The following changes since commit 76d20ea0f1b26ebd5da2f5fb2fdf3250cde887bb: Merge remote-tracking branch 'armbru/tags/pull-qapi-2017-05-04-v3' into staging (2017-05-09 15:49:14 -0400) are available in the git repository at: git://repo.or.cz/qemu/kevin.git tags/for-upstream for you to fetch changes up to d541e201bd3ad888f02abeddf0e14f7b0c126529: Merge remote-tracking branch 'mreitz/tags/pull-block-2017-05-11' into queue-block (2017-05-11 14:34:56 +0200) ---------------------------------------------------------------- Block layer patches ---------------------------------------------------------------- Anton Nefedov (1): qemu-img: wait for convert coroutines to complete Christoph Hellwig (1): nvme: Implement Write Zeroes Eric Blake (21): qemu-io: Improve alignment checks qemu-io: Switch 'alloc' command to byte-based length qemu-io: Switch 'map' output to byte-based reporting blkdebug: Sanity check block layer guarantees blkdebug: Refactor error injection blkdebug: Add pass-through write_zero and discard support blkdebug: Simplify override logic blkdebug: Add ability to override unmap geometries tests: Add coverage for recent block geometry fixes qcow2: Nicer variable names in qcow2_update_snapshot_refcount() qcow2: Use consistent switch indentation block: Update comments on BDRV_BLOCK_* meanings qcow2: Correctly report status of preallocated zero clusters qcow2: Name typedef for cluster type qcow2: Make distinction between zero cluster types obvious qcow2: Optimize zero_single_l2() to minimize L2 churn iotests: Improve _filter_qemu_img_map iotests: Add test 179 to cover write zeroes with unmap qcow2: Optimize write zero of unaligned tail cluster qcow2: Assert that cluster operations are aligned qcow2: Discard/zero clusters by byte count Fam Zheng (23): block: Make bdrv_perm_names public block: Add, parse and store "force-share" option block: Respect "force-share" in perm propagating qemu-img: Add --force-share option to subcommands qemu-img: Update documentation for -U qemu-io: Add --force-share option iotests: 030: Prepare for image locking iotests: 046: Prepare for image locking iotests: 055: Don't attach the target image already for drive-backup iotests: 085: Avoid image locking conflict iotests: 087: Don't attach test image twice iotests: 091: Quit QEMU before checking image iotests: 172: Use separate images for multiple devices tests: Use null-co:// instead of /dev/null as the dummy image file-posix: Add 'locking' option file-win32: Error out if locking=on tests: Disable image lock in test-replication block: Reuse bs as backing hd for drive-backup sync=none osdep: Add qemu_lock_fd and qemu_unlock_fd osdep: Fall back to posix lock when OFD lock is unavailable file-posix: Add image locking to perm operations qemu-iotests: Add test case 153 for image locking tests: Add POSIX image locking test case 182 John Snow (1): blockdev: use drained_begin/end for qmp_block_resize Kevin Wolf (7): migration: Unify block node activation error handling block: New BdrvChildRole.activate() for blk_resume_after_migration() block: Drop permissions when migration completes block: Inactivate parents before children block: Fix write/resize permissions for inactive images file-posix: Remove .bdrv_inactivate/invalidate_cache Merge remote-tracking branch 'mreitz/tags/pull-block-2017-05-11' into queue-block Max Reitz (5): qcow2: Fix preallocation size formula qcow2: Reuse preallocated zero clusters qcow2: Discard preallocated zero clusters iotests: Extend test 066 MAINTAINERS: Add qemu-progress to the block layer MAINTAINERS | 1 + block.c | 127 +++++++++++-- block/blkdebug.c | 264 +++++++++++++++++++++----- block/block-backend.c | 81 +++++--- block/file-posix.c | 248 +++++++++++++++++++++++- block/file-win32.c | 5 + block/qcow2-cluster.c | 252 ++++++++++++++---------- block/qcow2-refcount.c | 148 +++++++-------- block/qcow2-snapshot.c | 7 +- block/qcow2.c | 47 +++-- block/qcow2.h | 26 ++- blockdev.c | 20 +- hw/block/nvme.c | 26 +++ hw/block/nvme.h | 1 + include/block/block.h | 41 ++-- include/block/block_int.h | 14 ++ include/qemu/osdep.h | 3 + migration/migration.c | 13 +- migration/savevm.c | 9 +- qapi/block-core.json | 40 +++- qemu-img-cmds.hx | 36 ++-- qemu-img.c | 179 ++++++++++++----- qemu-io-cmds.c | 61 +++--- qemu-io.c | 42 +++- qmp.c | 18 +- tests/drive_del-test.c | 2 +- tests/nvme-test.c | 2 +- tests/qemu-iotests/019.out | 8 +- tests/qemu-iotests/030 | 18 +- tests/qemu-iotests/046 | 2 +- tests/qemu-iotests/055 | 32 ++-- tests/qemu-iotests/060.out | 6 +- tests/qemu-iotests/066 | 128 ++++++++++++- tests/qemu-iotests/066.out | 46 +++++ tests/qemu-iotests/085 | 33 ++-- tests/qemu-iotests/085.out | 3 +- tests/qemu-iotests/087 | 6 +- tests/qemu-iotests/091 | 2 + tests/qemu-iotests/102.out | 4 +- tests/qemu-iotests/122.out | 16 +- tests/qemu-iotests/146.out | 30 +-- tests/qemu-iotests/153 | 233 +++++++++++++++++++++++ tests/qemu-iotests/153.out | 390 ++++++++++++++++++++++++++++++++++++++ tests/qemu-iotests/154 | 160 +++++++++++++++- tests/qemu-iotests/154.out | 158 +++++++++++++-- tests/qemu-iotests/172 | 55 +++--- tests/qemu-iotests/172.out | 50 ++--- tests/qemu-iotests/177 | 114 +++++++++++ tests/qemu-iotests/177.out | 49 +++++ tests/qemu-iotests/179 | 130 +++++++++++++ tests/qemu-iotests/179.out | 156 +++++++++++++++ tests/qemu-iotests/182 | 68 +++++++ tests/qemu-iotests/182.out | 8 + tests/qemu-iotests/common.filter | 4 +- tests/qemu-iotests/common.pattern | 2 +- tests/qemu-iotests/group | 4 + tests/test-replication.c | 9 +- tests/usb-hcd-uhci-test.c | 2 +- tests/usb-hcd-xhci-test.c | 2 +- tests/virtio-blk-test.c | 2 +- tests/virtio-scsi-test.c | 5 +- util/osdep.c | 48 +++++ 62 files changed, 3086 insertions(+), 610 deletions(-) create mode 100755 tests/qemu-iotests/153 create mode 100644 tests/qemu-iotests/153.out create mode 100755 tests/qemu-iotests/177 create mode 100644 tests/qemu-iotests/177.out create mode 100755 tests/qemu-iotests/179 create mode 100644 tests/qemu-iotests/179.out create mode 100755 tests/qemu-iotests/182 create mode 100644 tests/qemu-iotests/182.out From: Fam Zheng <famz@redhat.com> It can be used outside of block.c for making user friendly messages. Signed-off-by: Fam Zheng <famz@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com> --- block.c | 2 +- include/block/block.h | 2 ++ 2 files changed, 3 insertions(+), 1 deletion(-) diff --git a/block.c b/block.c index XXXXXXX..XXXXXXX 100644 --- a/block.c +++ b/block.c @@ -XXX,XX +XXX,XX @@ static char *bdrv_child_user_desc(BdrvChild *c) return g_strdup("another user"); } -static char *bdrv_perm_names(uint64_t perm) +char *bdrv_perm_names(uint64_t perm) { struct perm_name { uint64_t perm; diff --git a/include/block/block.h b/include/block/block.h index XXXXXXX..XXXXXXX 100644 --- a/include/block/block.h +++ b/include/block/block.h @@ -XXX,XX +XXX,XX @@ enum { BLK_PERM_ALL = 0x1f, }; +char *bdrv_perm_names(uint64_t perm); + /* disk I/O throttling */ void bdrv_init(void); void bdrv_init_with_whitelist(void); -- 1.8.3.1 From: Fam Zheng <famz@redhat.com> Signed-off-by: Fam Zheng <famz@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com> --- block.c | 17 +++++++++++++++++ include/block/block.h | 1 + include/block/block_int.h | 1 + qapi/block-core.json | 3 +++ 4 files changed, 22 insertions(+) diff --git a/block.c b/block.c index XXXXXXX..XXXXXXX 100644 --- a/block.c +++ b/block.c @@ -XXX,XX +XXX,XX @@ static void bdrv_inherited_options(int *child_flags, QDict *child_options, * the parent. */ qdict_copy_default(child_options, parent_options, BDRV_OPT_CACHE_DIRECT); qdict_copy_default(child_options, parent_options, BDRV_OPT_CACHE_NO_FLUSH); + qdict_copy_default(child_options, parent_options, BDRV_OPT_FORCE_SHARE); /* Inherit the read-only option from the parent if it's not set */ qdict_copy_default(child_options, parent_options, BDRV_OPT_READ_ONLY); @@ -XXX,XX +XXX,XX @@ static void bdrv_backing_options(int *child_flags, QDict *child_options, * which is only applied on the top level (BlockBackend) */ qdict_copy_default(child_options, parent_options, BDRV_OPT_CACHE_DIRECT); qdict_copy_default(child_options, parent_options, BDRV_OPT_CACHE_NO_FLUSH); + qdict_copy_default(child_options, parent_options, BDRV_OPT_FORCE_SHARE); /* backing files always opened read-only */ qdict_set_default_str(child_options, BDRV_OPT_READ_ONLY, "on"); @@ -XXX,XX +XXX,XX @@ QemuOptsList bdrv_runtime_opts = { .type = QEMU_OPT_STRING, .help = "discard operation (ignore/off, unmap/on)", }, + { + .name = BDRV_OPT_FORCE_SHARE, + .type = QEMU_OPT_BOOL, + .help = "always accept other writers (default: off)", + }, { /* end of list */ } }, }; @@ -XXX,XX +XXX,XX @@ static int bdrv_open_common(BlockDriverState *bs, BlockBackend *file, drv = bdrv_find_format(driver_name); assert(drv != NULL); + bs->force_share = qemu_opt_get_bool(opts, BDRV_OPT_FORCE_SHARE, false); + + if (bs->force_share && (bs->open_flags & BDRV_O_RDWR)) { + error_setg(errp, + BDRV_OPT_FORCE_SHARE + "=on can only be used with read-only images"); + ret = -EINVAL; + goto fail_opts; + } + if (file != NULL) { filename = blk_bs(file)->filename; } else { diff --git a/include/block/block.h b/include/block/block.h index XXXXXXX..XXXXXXX 100644 --- a/include/block/block.h +++ b/include/block/block.h @@ -XXX,XX +XXX,XX @@ typedef struct HDGeometry { #define BDRV_OPT_CACHE_NO_FLUSH "cache.no-flush" #define BDRV_OPT_READ_ONLY "read-only" #define BDRV_OPT_DISCARD "discard" +#define BDRV_OPT_FORCE_SHARE "force-share" #define BDRV_SECTOR_BITS 9 diff --git a/include/block/block_int.h b/include/block/block_int.h index XXXXXXX..XXXXXXX 100644 --- a/include/block/block_int.h +++ b/include/block/block_int.h @@ -XXX,XX +XXX,XX @@ struct BlockDriverState { bool valid_key; /* if true, a valid encryption key has been set */ bool sg; /* if true, the device is a /dev/sg* */ bool probed; /* if true, format was probed rather than specified */ + bool force_share; /* if true, always allow all shared permissions */ BlockDriver *drv; /* NULL means no media */ void *opaque; diff --git a/qapi/block-core.json b/qapi/block-core.json index XXXXXXX..XXXXXXX 100644 --- a/qapi/block-core.json +++ b/qapi/block-core.json @@ -XXX,XX +XXX,XX @@ # (default: false) # @detect-zeroes: detect and optimize zero writes (Since 2.1) # (default: off) +# @force-share: force share all permission on added nodes. +# Requires read-only=true. (Since 2.10) # # Remaining options are determined by the block driver. # @@ -XXX,XX +XXX,XX @@ '*discard': 'BlockdevDiscardOptions', '*cache': 'BlockdevCacheOptions', '*read-only': 'bool', + '*force-share': 'bool', '*detect-zeroes': 'BlockdevDetectZeroesOptions' }, 'discriminator': 'driver', 'data': { -- 1.8.3.1 From: Fam Zheng <famz@redhat.com> Signed-off-by: Fam Zheng <famz@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com> --- block.c | 32 ++++++++++++++++++++++++-------- 1 file changed, 24 insertions(+), 8 deletions(-) diff --git a/block.c b/block.c index XXXXXXX..XXXXXXX 100644 --- a/block.c +++ b/block.c @@ -XXX,XX +XXX,XX @@ static int bdrv_child_check_perm(BdrvChild *c, uint64_t perm, uint64_t shared, static void bdrv_child_abort_perm_update(BdrvChild *c); static void bdrv_child_set_perm(BdrvChild *c, uint64_t perm, uint64_t shared); +static void bdrv_child_perm(BlockDriverState *bs, BlockDriverState *child_bs, + BdrvChild *c, + const BdrvChildRole *role, + uint64_t parent_perm, uint64_t parent_shared, + uint64_t *nperm, uint64_t *nshared) +{ + if (bs->drv && bs->drv->bdrv_child_perm) { + bs->drv->bdrv_child_perm(bs, c, role, + parent_perm, parent_shared, + nperm, nshared); + } + if (child_bs && child_bs->force_share) { + *nshared = BLK_PERM_ALL; + } +} + /* * Check whether permissions on this node can be changed in a way that * @cumulative_perms and @cumulative_shared_perms are the new cumulative @@ -XXX,XX +XXX,XX @@ static int bdrv_check_perm(BlockDriverState *bs, uint64_t cumulative_perms, /* Check all children */ QLIST_FOREACH(c, &bs->children, next) { uint64_t cur_perm, cur_shared; - drv->bdrv_child_perm(bs, c, c->role, - cumulative_perms, cumulative_shared_perms, - &cur_perm, &cur_shared); + bdrv_child_perm(bs, c->bs, c, c->role, + cumulative_perms, cumulative_shared_perms, + &cur_perm, &cur_shared); ret = bdrv_child_check_perm(c, cur_perm, cur_shared, ignore_children, errp); if (ret < 0) { @@ -XXX,XX +XXX,XX @@ static void bdrv_set_perm(BlockDriverState *bs, uint64_t cumulative_perms, /* Update all children */ QLIST_FOREACH(c, &bs->children, next) { uint64_t cur_perm, cur_shared; - drv->bdrv_child_perm(bs, c, c->role, - cumulative_perms, cumulative_shared_perms, - &cur_perm, &cur_shared); + bdrv_child_perm(bs, c->bs, c, c->role, + cumulative_perms, cumulative_shared_perms, + &cur_perm, &cur_shared); bdrv_child_set_perm(c, cur_perm, cur_shared); } } @@ -XXX,XX +XXX,XX @@ BdrvChild *bdrv_attach_child(BlockDriverState *parent_bs, assert(parent_bs->drv); assert(bdrv_get_aio_context(parent_bs) == bdrv_get_aio_context(child_bs)); - parent_bs->drv->bdrv_child_perm(parent_bs, NULL, child_role, - perm, shared_perm, &perm, &shared_perm); + bdrv_child_perm(parent_bs, child_bs, NULL, child_role, + perm, shared_perm, &perm, &shared_perm); child = bdrv_root_attach_child(child_bs, child_name, child_role, perm, shared_perm, parent_bs, errp); -- 1.8.3.1 From: Fam Zheng <famz@redhat.com> This will force the opened images to allow sharing all permissions with other programs. Signed-off-by: Fam Zheng <famz@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com> --- qemu-img.c | 153 ++++++++++++++++++++++++++++++++++++++++++++++--------------- 1 file changed, 117 insertions(+), 36 deletions(-) diff --git a/qemu-img.c b/qemu-img.c index XXXXXXX..XXXXXXX 100644 --- a/qemu-img.c +++ b/qemu-img.c @@ -XXX,XX +XXX,XX @@ #include "qapi/qobject-output-visitor.h" #include "qapi/qmp/qerror.h" #include "qapi/qmp/qjson.h" +#include "qapi/qmp/qbool.h" #include "qemu/cutils.h" #include "qemu/config-file.h" #include "qemu/option.h" @@ -XXX,XX +XXX,XX @@ static int img_open_password(BlockBackend *blk, const char *filename, static BlockBackend *img_open_opts(const char *optstr, QemuOpts *opts, int flags, bool writethrough, - bool quiet) + bool quiet, bool force_share) { QDict *options; Error *local_err = NULL; BlockBackend *blk; options = qemu_opts_to_qdict(opts, NULL); + if (force_share) { + if (qdict_haskey(options, BDRV_OPT_FORCE_SHARE) + && !qdict_get_bool(options, BDRV_OPT_FORCE_SHARE)) { + error_report("--force-share/-U conflicts with image options"); + return NULL; + } + qdict_put(options, BDRV_OPT_FORCE_SHARE, qbool_from_bool(true)); + } blk = blk_new_open(NULL, NULL, options, flags, &local_err); if (!blk) { error_reportf_err(local_err, "Could not open '%s': ", optstr); @@ -XXX,XX +XXX,XX @@ static BlockBackend *img_open_opts(const char *optstr, static BlockBackend *img_open_file(const char *filename, const char *fmt, int flags, - bool writethrough, bool quiet) + bool writethrough, bool quiet, + bool force_share) { BlockBackend *blk; Error *local_err = NULL; - QDict *options = NULL; + QDict *options = qdict_new(); if (fmt) { - options = qdict_new(); qdict_put_str(options, "driver", fmt); } + if (force_share) { + qdict_put(options, BDRV_OPT_FORCE_SHARE, qbool_from_bool(true)); + } blk = blk_new_open(filename, NULL, options, flags, &local_err); if (!blk) { error_reportf_err(local_err, "Could not open '%s': ", filename); @@ -XXX,XX +XXX,XX @@ static BlockBackend *img_open_file(const char *filename, static BlockBackend *img_open(bool image_opts, const char *filename, const char *fmt, int flags, bool writethrough, - bool quiet) + bool quiet, bool force_share) { BlockBackend *blk; if (image_opts) { @@ -XXX,XX +XXX,XX @@ static BlockBackend *img_open(bool image_opts, if (!opts) { return NULL; } - blk = img_open_opts(filename, opts, flags, writethrough, quiet); + blk = img_open_opts(filename, opts, flags, writethrough, quiet, + force_share); } else { - blk = img_open_file(filename, fmt, flags, writethrough, quiet); + blk = img_open_file(filename, fmt, flags, writethrough, quiet, + force_share); } return blk; } @@ -XXX,XX +XXX,XX @@ static int img_check(int argc, char **argv) ImageCheck *check; bool quiet = false; bool image_opts = false; + bool force_share = false; fmt = NULL; output = NULL; @@ -XXX,XX +XXX,XX @@ static int img_check(int argc, char **argv) {"output", required_argument, 0, OPTION_OUTPUT}, {"object", required_argument, 0, OPTION_OBJECT}, {"image-opts", no_argument, 0, OPTION_IMAGE_OPTS}, + {"force-share", no_argument, 0, 'U'}, {0, 0, 0, 0} }; - c = getopt_long(argc, argv, ":hf:r:T:q", + c = getopt_long(argc, argv, ":hf:r:T:qU", long_options, &option_index); if (c == -1) { break; @@ -XXX,XX +XXX,XX @@ static int img_check(int argc, char **argv) case 'q': quiet = true; break; + case 'U': + force_share = true; + break; case OPTION_OBJECT: { QemuOpts *opts; opts = qemu_opts_parse_noisily(&qemu_object_opts, @@ -XXX,XX +XXX,XX @@ static int img_check(int argc, char **argv) return 1; } - blk = img_open(image_opts, filename, fmt, flags, writethrough, quiet); + blk = img_open(image_opts, filename, fmt, flags, writethrough, quiet, + force_share); if (!blk) { return 1; } @@ -XXX,XX +XXX,XX @@ static int img_commit(int argc, char **argv) return 1; } - blk = img_open(image_opts, filename, fmt, flags, writethrough, quiet); + blk = img_open(image_opts, filename, fmt, flags, writethrough, quiet, + false); if (!blk) { return 1; } @@ -XXX,XX +XXX,XX @@ static int img_compare(int argc, char **argv) int c, pnum; uint64_t progress_base; bool image_opts = false; + bool force_share = false; cache = BDRV_DEFAULT_CACHE; for (;;) { @@ -XXX,XX +XXX,XX @@ static int img_compare(int argc, char **argv) {"help", no_argument, 0, 'h'}, {"object", required_argument, 0, OPTION_OBJECT}, {"image-opts", no_argument, 0, OPTION_IMAGE_OPTS}, + {"force-share", no_argument, 0, 'U'}, {0, 0, 0, 0} }; - c = getopt_long(argc, argv, ":hf:F:T:pqs", + c = getopt_long(argc, argv, ":hf:F:T:pqsU", long_options, NULL); if (c == -1) { break; @@ -XXX,XX +XXX,XX @@ static int img_compare(int argc, char **argv) case 's': strict = true; break; + case 'U': + force_share = true; + break; case OPTION_OBJECT: { QemuOpts *opts; opts = qemu_opts_parse_noisily(&qemu_object_opts, @@ -XXX,XX +XXX,XX @@ static int img_compare(int argc, char **argv) goto out3; } - blk1 = img_open(image_opts, filename1, fmt1, flags, writethrough, quiet); + blk1 = img_open(image_opts, filename1, fmt1, flags, writethrough, quiet, + force_share); if (!blk1) { ret = 2; goto out3; } - blk2 = img_open(image_opts, filename2, fmt2, flags, writethrough, quiet); + blk2 = img_open(image_opts, filename2, fmt2, flags, writethrough, quiet, + force_share); if (!blk2) { ret = 2; goto out2; @@ -XXX,XX +XXX,XX @@ static int img_convert(int argc, char **argv) bool writethrough, src_writethrough, quiet = false, image_opts = false, skip_create = false, progress = false; int64_t ret = -EINVAL; + bool force_share = false; ImgConvertState s = (ImgConvertState) { /* Need at least 4k of zeros for sparse detection */ @@ -XXX,XX +XXX,XX @@ static int img_convert(int argc, char **argv) {"help", no_argument, 0, 'h'}, {"object", required_argument, 0, OPTION_OBJECT}, {"image-opts", no_argument, 0, OPTION_IMAGE_OPTS}, + {"force-share", no_argument, 0, 'U'}, {0, 0, 0, 0} }; - c = getopt_long(argc, argv, ":hf:O:B:ce6o:s:l:S:pt:T:qnm:W", + c = getopt_long(argc, argv, ":hf:O:B:ce6o:s:l:S:pt:T:qnm:WU", long_options, NULL); if (c == -1) { break; @@ -XXX,XX +XXX,XX @@ static int img_convert(int argc, char **argv) case 'W': s.wr_in_order = false; break; + case 'U': + force_share = true; + break; case OPTION_OBJECT: { QemuOpts *object_opts; object_opts = qemu_opts_parse_noisily(&qemu_object_opts, @@ -XXX,XX +XXX,XX @@ static int img_convert(int argc, char **argv) for (bs_i = 0; bs_i < s.src_num; bs_i++) { s.src[bs_i] = img_open(image_opts, argv[optind + bs_i], - fmt, src_flags, src_writethrough, quiet); + fmt, src_flags, src_writethrough, quiet, + force_share); if (!s.src[bs_i]) { ret = -1; goto out; @@ -XXX,XX +XXX,XX @@ static int img_convert(int argc, char **argv) * the bdrv_create() call which takes different params. * Not critical right now, so fix can wait... */ - s.target = img_open_file(out_filename, out_fmt, flags, writethrough, quiet); + s.target = img_open_file(out_filename, out_fmt, flags, writethrough, quiet, + false); if (!s.target) { ret = -1; goto out; @@ -XXX,XX +XXX,XX @@ static gboolean str_equal_func(gconstpointer a, gconstpointer b) static ImageInfoList *collect_image_info_list(bool image_opts, const char *filename, const char *fmt, - bool chain) + bool chain, bool force_share) { ImageInfoList *head = NULL; ImageInfoList **last = &head; @@ -XXX,XX +XXX,XX @@ static ImageInfoList *collect_image_info_list(bool image_opts, g_hash_table_insert(filenames, (gpointer)filename, NULL); blk = img_open(image_opts, filename, fmt, - BDRV_O_NO_BACKING | BDRV_O_NO_IO, false, false); + BDRV_O_NO_BACKING | BDRV_O_NO_IO, false, false, + force_share); if (!blk) { goto err; } @@ -XXX,XX +XXX,XX @@ static int img_info(int argc, char **argv) const char *filename, *fmt, *output; ImageInfoList *list; bool image_opts = false; + bool force_share = false; fmt = NULL; output = NULL; @@ -XXX,XX +XXX,XX @@ static int img_info(int argc, char **argv) {"backing-chain", no_argument, 0, OPTION_BACKING_CHAIN}, {"object", required_argument, 0, OPTION_OBJECT}, {"image-opts", no_argument, 0, OPTION_IMAGE_OPTS}, + {"force-share", no_argument, 0, 'U'}, {0, 0, 0, 0} }; - c = getopt_long(argc, argv, ":f:h", + c = getopt_long(argc, argv, ":f:hU", long_options, &option_index); if (c == -1) { break; @@ -XXX,XX +XXX,XX @@ static int img_info(int argc, char **argv) case 'f': fmt = optarg; break; + case 'U': + force_share = true; + break; case OPTION_OUTPUT: output = optarg; break; @@ -XXX,XX +XXX,XX @@ static int img_info(int argc, char **argv) return 1; } - list = collect_image_info_list(image_opts, filename, fmt, chain); + list = collect_image_info_list(image_opts, filename, fmt, chain, + force_share); if (!list) { return 1; } @@ -XXX,XX +XXX,XX @@ static int img_map(int argc, char **argv) MapEntry curr = { .length = 0 }, next; int ret = 0; bool image_opts = false; + bool force_share = false; fmt = NULL; output = NULL; @@ -XXX,XX +XXX,XX @@ static int img_map(int argc, char **argv) {"output", required_argument, 0, OPTION_OUTPUT}, {"object", required_argument, 0, OPTION_OBJECT}, {"image-opts", no_argument, 0, OPTION_IMAGE_OPTS}, + {"force-share", no_argument, 0, 'U'}, {0, 0, 0, 0} }; - c = getopt_long(argc, argv, ":f:h", + c = getopt_long(argc, argv, ":f:hU", long_options, &option_index); if (c == -1) { break; @@ -XXX,XX +XXX,XX @@ static int img_map(int argc, char **argv) case 'f': fmt = optarg; break; + case 'U': + force_share = true; + break; case OPTION_OUTPUT: output = optarg; break; @@ -XXX,XX +XXX,XX @@ static int img_map(int argc, char **argv) return 1; } - blk = img_open(image_opts, filename, fmt, 0, false, false); + blk = img_open(image_opts, filename, fmt, 0, false, false, force_share); if (!blk) { return 1; } @@ -XXX,XX +XXX,XX @@ static int img_snapshot(int argc, char **argv) bool quiet = false; Error *err = NULL; bool image_opts = false; + bool force_share = false; bdrv_oflags = BDRV_O_RDWR; /* Parse commandline parameters */ @@ -XXX,XX +XXX,XX @@ static int img_snapshot(int argc, char **argv) {"help", no_argument, 0, 'h'}, {"object", required_argument, 0, OPTION_OBJECT}, {"image-opts", no_argument, 0, OPTION_IMAGE_OPTS}, + {"force-share", no_argument, 0, 'U'}, {0, 0, 0, 0} }; - c = getopt_long(argc, argv, ":la:c:d:hq", + c = getopt_long(argc, argv, ":la:c:d:hqU", long_options, NULL); if (c == -1) { break; @@ -XXX,XX +XXX,XX @@ static int img_snapshot(int argc, char **argv) case 'q': quiet = true; break; + case 'U': + force_share = true; + break; case OPTION_OBJECT: { QemuOpts *opts; opts = qemu_opts_parse_noisily(&qemu_object_opts, @@ -XXX,XX +XXX,XX @@ static int img_snapshot(int argc, char **argv) } /* Open the image */ - blk = img_open(image_opts, filename, NULL, bdrv_oflags, false, quiet); + blk = img_open(image_opts, filename, NULL, bdrv_oflags, false, quiet, + force_share); if (!blk) { return 1; } @@ -XXX,XX +XXX,XX @@ static int img_rebase(int argc, char **argv) int c, flags, src_flags, ret; bool writethrough, src_writethrough; int unsafe = 0; + bool force_share = false; int progress = 0; bool quiet = false; Error *local_err = NULL; @@ -XXX,XX +XXX,XX @@ static int img_rebase(int argc, char **argv) {"help", no_argument, 0, 'h'}, {"object", required_argument, 0, OPTION_OBJECT}, {"image-opts", no_argument, 0, OPTION_IMAGE_OPTS}, + {"force-share", no_argument, 0, 'U'}, {0, 0, 0, 0} }; - c = getopt_long(argc, argv, ":hf:F:b:upt:T:q", + c = getopt_long(argc, argv, ":hf:F:b:upt:T:qU", long_options, NULL); if (c == -1) { break; @@ -XXX,XX +XXX,XX @@ static int img_rebase(int argc, char **argv) case OPTION_IMAGE_OPTS: image_opts = true; break; + case 'U': + force_share = true; + break; } } @@ -XXX,XX +XXX,XX @@ static int img_rebase(int argc, char **argv) * Ignore the old backing file for unsafe rebase in case we want to correct * the reference to a renamed or moved backing file. */ - blk = img_open(image_opts, filename, fmt, flags, writethrough, quiet); + blk = img_open(image_opts, filename, fmt, flags, writethrough, quiet, + false); if (!blk) { ret = -1; goto out; @@ -XXX,XX +XXX,XX @@ static int img_rebase(int argc, char **argv) qdict_put_str(options, "driver", bs->backing_format); } + if (force_share) { + if (!options) { + options = qdict_new(); + } + qdict_put(options, BDRV_OPT_FORCE_SHARE, + qbool_from_bool(true)); + } bdrv_get_backing_filename(bs, backing_name, sizeof(backing_name)); blk_old_backing = blk_new_open(backing_name, NULL, options, src_flags, &local_err); @@ -XXX,XX +XXX,XX @@ static int img_rebase(int argc, char **argv) } if (out_baseimg[0]) { + options = qdict_new(); if (out_basefmt) { - options = qdict_new(); qdict_put_str(options, "driver", out_basefmt); - } else { - options = NULL; + } + if (force_share) { + qdict_put_bool(options, BDRV_OPT_FORCE_SHARE, true); } blk_new_backing = blk_new_open(out_baseimg, NULL, @@ -XXX,XX +XXX,XX @@ static int img_resize(int argc, char **argv) qemu_opts_del(param); blk = img_open(image_opts, filename, fmt, - BDRV_O_RDWR | BDRV_O_RESIZE, false, quiet); + BDRV_O_RDWR | BDRV_O_RESIZE, false, quiet, + false); if (!blk) { ret = -1; goto out; @@ -XXX,XX +XXX,XX @@ static int img_amend(int argc, char **argv) goto out; } - blk = img_open(image_opts, filename, fmt, flags, writethrough, quiet); + blk = img_open(image_opts, filename, fmt, flags, writethrough, quiet, + false); if (!blk) { ret = -1; goto out; @@ -XXX,XX +XXX,XX @@ static int img_bench(int argc, char **argv) bool writethrough = false; struct timeval t1, t2; int i; + bool force_share = false; for (;;) { static const struct option long_options[] = { @@ -XXX,XX +XXX,XX @@ static int img_bench(int argc, char **argv) {"image-opts", no_argument, 0, OPTION_IMAGE_OPTS}, {"pattern", required_argument, 0, OPTION_PATTERN}, {"no-drain", no_argument, 0, OPTION_NO_DRAIN}, + {"force-share", no_argument, 0, 'U'}, {0, 0, 0, 0} }; - c = getopt_long(argc, argv, ":hc:d:f:no:qs:S:t:w", long_options, NULL); + c = getopt_long(argc, argv, ":hc:d:f:no:qs:S:t:wU", long_options, NULL); if (c == -1) { break; } @@ -XXX,XX +XXX,XX @@ static int img_bench(int argc, char **argv) flags |= BDRV_O_RDWR; is_write = true; break; + case 'U': + force_share = true; + break; case OPTION_PATTERN: { unsigned long res; @@ -XXX,XX +XXX,XX @@ static int img_bench(int argc, char **argv) goto out; } - blk = img_open(image_opts, filename, fmt, flags, writethrough, quiet); + blk = img_open(image_opts, filename, fmt, flags, writethrough, quiet, + force_share); if (!blk) { ret = -1; goto out; @@ -XXX,XX +XXX,XX @@ static int img_dd(int argc, char **argv) const char *fmt = NULL; int64_t size = 0; int64_t block_count = 0, out_pos, in_pos; + bool force_share = false; struct DdInfo dd = { .flags = 0, .count = 0, @@ -XXX,XX +XXX,XX @@ static int img_dd(int argc, char **argv) const struct option long_options[] = { { "help", no_argument, 0, 'h'}, { "image-opts", no_argument, 0, OPTION_IMAGE_OPTS}, + { "force-share", no_argument, 0, 'U'}, { 0, 0, 0, 0 } }; - while ((c = getopt_long(argc, argv, ":hf:O:", long_options, NULL))) { + while ((c = getopt_long(argc, argv, ":hf:O:U", long_options, NULL))) { if (c == EOF) { break; } @@ -XXX,XX +XXX,XX @@ static int img_dd(int argc, char **argv) case 'h': help(); break; + case 'U': + force_share = true; + break; case OPTION_IMAGE_OPTS: image_opts = true; break; @@ -XXX,XX +XXX,XX @@ static int img_dd(int argc, char **argv) ret = -1; goto out; } - blk1 = img_open(image_opts, in.filename, fmt, 0, false, false); + blk1 = img_open(image_opts, in.filename, fmt, 0, false, false, + force_share); if (!blk1) { ret = -1; @@ -XXX,XX +XXX,XX @@ static int img_dd(int argc, char **argv) } blk2 = img_open(image_opts, out.filename, out_fmt, BDRV_O_RDWR, - false, false); + false, false, false); if (!blk2) { ret = -1; -- 1.8.3.1 From: Fam Zheng <famz@redhat.com> Signed-off-by: Fam Zheng <famz@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com> --- qemu-img-cmds.hx | 36 ++++++++++++++++++------------------ 1 file changed, 18 insertions(+), 18 deletions(-) diff --git a/qemu-img-cmds.hx b/qemu-img-cmds.hx index XXXXXXX..XXXXXXX 100644 --- a/qemu-img-cmds.hx +++ b/qemu-img-cmds.hx @@ -XXX,XX +XXX,XX @@ STEXI ETEXI DEF("bench", img_bench, - "bench [-c count] [-d depth] [-f fmt] [--flush-interval=flush_interval] [-n] [--no-drain] [-o offset] [--pattern=pattern] [-q] [-s buffer_size] [-S step_size] [-t cache] [-w] filename") + "bench [-c count] [-d depth] [-f fmt] [--flush-interval=flush_interval] [-n] [--no-drain] [-o offset] [--pattern=pattern] [-q] [-s buffer_size] [-S step_size] [-t cache] [-w] [-U] filename") STEXI -@item bench [-c @var{count}] [-d @var{depth}] [-f @var{fmt}] [--flush-interval=@var{flush_interval}] [-n] [--no-drain] [-o @var{offset}] [--pattern=@var{pattern}] [-q] [-s @var{buffer_size}] [-S @var{step_size}] [-t @var{cache}] [-w] @var{filename} +@item bench [-c @var{count}] [-d @var{depth}] [-f @var{fmt}] [--flush-interval=@var{flush_interval}] [-n] [--no-drain] [-o @var{offset}] [--pattern=@var{pattern}] [-q] [-s @var{buffer_size}] [-S @var{step_size}] [-t @var{cache}] [-w] [-U] @var{filename} ETEXI DEF("check", img_check, - "check [-q] [--object objectdef] [--image-opts] [-f fmt] [--output=ofmt] [-r [leaks | all]] [-T src_cache] filename") + "check [-q] [--object objectdef] [--image-opts] [-f fmt] [--output=ofmt] [-r [leaks | all]] [-T src_cache] [-U] filename") STEXI -@item check [--object @var{objectdef}] [--image-opts] [-q] [-f @var{fmt}] [--output=@var{ofmt}] [-r [leaks | all]] [-T @var{src_cache}] @var{filename} +@item check [--object @var{objectdef}] [--image-opts] [-q] [-f @var{fmt}] [--output=@var{ofmt}] [-r [leaks | all]] [-T @var{src_cache}] [-U] @var{filename} ETEXI DEF("create", img_create, @@ -XXX,XX +XXX,XX @@ STEXI ETEXI DEF("compare", img_compare, - "compare [--object objectdef] [--image-opts] [-f fmt] [-F fmt] [-T src_cache] [-p] [-q] [-s] filename1 filename2") + "compare [--object objectdef] [--image-opts] [-f fmt] [-F fmt] [-T src_cache] [-p] [-q] [-s] [-U] filename1 filename2") STEXI -@item compare [--object @var{objectdef}] [--image-opts] [-f @var{fmt}] [-F @var{fmt}] [-T @var{src_cache}] [-p] [-q] [-s] @var{filename1} @var{filename2} +@item compare [--object @var{objectdef}] [--image-opts] [-f @var{fmt}] [-F @var{fmt}] [-T @var{src_cache}] [-p] [-q] [-s] [-U] @var{filename1} @var{filename2} ETEXI DEF("convert", img_convert, - "convert [--object objectdef] [--image-opts] [-c] [-p] [-q] [-n] [-f fmt] [-t cache] [-T src_cache] [-O output_fmt] [-B backing_file] [-o options] [-s snapshot_id_or_name] [-l snapshot_param] [-S sparse_size] [-m num_coroutines] [-W] filename [filename2 [...]] output_filename") + "convert [--object objectdef] [--image-opts] [-U] [-c] [-p] [-q] [-n] [-f fmt] [-t cache] [-T src_cache] [-O output_fmt] [-o options] [-s snapshot_id_or_name] [-l snapshot_param] [-S sparse_size] [-m num_coroutines] [-W] filename [filename2 [...]] output_filename") STEXI -@item convert [--object @var{objectdef}] [--image-opts] [-c] [-p] [-q] [-n] [-f @var{fmt}] [-t @var{cache}] [-T @var{src_cache}] [-O @var{output_fmt}] [-B @var{backing_file}] [-o @var{options}] [-s @var{snapshot_id_or_name}] [-l @var{snapshot_param}] [-S @var{sparse_size}] [-m @var{num_coroutines}] [-W] @var{filename} [@var{filename2} [...]] @var{output_filename} +@item convert [--object @var{objectdef}] [--image-opts] [-U] [-c] [-p] [-q] [-n] [-f @var{fmt}] [-t @var{cache}] [-T @var{src_cache}] [-O @var{output_fmt}] [-o @var{options}] [-s @var{snapshot_id_or_name}] [-l @var{snapshot_param}] [-S @var{sparse_size}] [-m @var{num_coroutines}] [-W] @var{filename} [@var{filename2} [...]] @var{output_filename} ETEXI DEF("dd", img_dd, - "dd [--image-opts] [-f fmt] [-O output_fmt] [bs=block_size] [count=blocks] [skip=blocks] if=input of=output") + "dd [--image-opts] [-U] [-f fmt] [-O output_fmt] [bs=block_size] [count=blocks] [skip=blocks] if=input of=output") STEXI -@item dd [--image-opts] [-f @var{fmt}] [-O @var{output_fmt}] [bs=@var{block_size}] [count=@var{blocks}] [skip=@var{blocks}] if=@var{input} of=@var{output} +@item dd [--image-opts] [-U] [-f @var{fmt}] [-O @var{output_fmt}] [bs=@var{block_size}] [count=@var{blocks}] [skip=@var{blocks}] if=@var{input} of=@var{output} ETEXI DEF("info", img_info, - "info [--object objectdef] [--image-opts] [-f fmt] [--output=ofmt] [--backing-chain] filename") + "info [--object objectdef] [--image-opts] [-f fmt] [--output=ofmt] [--backing-chain] [-U] filename") STEXI -@item info [--object @var{objectdef}] [--image-opts] [-f @var{fmt}] [--output=@var{ofmt}] [--backing-chain] @var{filename} +@item info [--object @var{objectdef}] [--image-opts] [-f @var{fmt}] [--output=@var{ofmt}] [--backing-chain] [-U] @var{filename} ETEXI DEF("map", img_map, - "map [--object objectdef] [--image-opts] [-f fmt] [--output=ofmt] filename") + "map [--object objectdef] [--image-opts] [-f fmt] [--output=ofmt] [-U] filename") STEXI -@item map [--object @var{objectdef}] [--image-opts] [-f @var{fmt}] [--output=@var{ofmt}] @var{filename} +@item map [--object @var{objectdef}] [--image-opts] [-f @var{fmt}] [--output=@var{ofmt}] [-U] @var{filename} ETEXI DEF("snapshot", img_snapshot, - "snapshot [--object objectdef] [--image-opts] [-q] [-l | -a snapshot | -c snapshot | -d snapshot] filename") + "snapshot [--object objectdef] [--image-opts] [-U] [-q] [-l | -a snapshot | -c snapshot | -d snapshot] filename") STEXI -@item snapshot [--object @var{objectdef}] [--image-opts] [-q] [-l | -a @var{snapshot} | -c @var{snapshot} | -d @var{snapshot}] @var{filename} +@item snapshot [--object @var{objectdef}] [--image-opts] [-U] [-q] [-l | -a @var{snapshot} | -c @var{snapshot} | -d @var{snapshot}] @var{filename} ETEXI DEF("rebase", img_rebase, - "rebase [--object objectdef] [--image-opts] [-q] [-f fmt] [-t cache] [-T src_cache] [-p] [-u] -b backing_file [-F backing_fmt] filename") + "rebase [--object objectdef] [--image-opts] [-U] [-q] [-f fmt] [-t cache] [-T src_cache] [-p] [-u] -b backing_file [-F backing_fmt] filename") STEXI -@item rebase [--object @var{objectdef}] [--image-opts] [-q] [-f @var{fmt}] [-t @var{cache}] [-T @var{src_cache}] [-p] [-u] -b @var{backing_file} [-F @var{backing_fmt}] @var{filename} +@item rebase [--object @var{objectdef}] [--image-opts] [-U] [-q] [-f @var{fmt}] [-t @var{cache}] [-T @var{src_cache}] [-p] [-u] -b @var{backing_file} [-F @var{backing_fmt}] @var{filename} ETEXI DEF("resize", img_resize, -- 1.8.3.1 From: Fam Zheng <famz@redhat.com> Add --force-share/-U to program options and -U to open subcommand. Signed-off-by: Fam Zheng <famz@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com> --- qemu-io.c | 42 ++++++++++++++++++++++++++++++++++-------- 1 file changed, 34 insertions(+), 8 deletions(-) diff --git a/qemu-io.c b/qemu-io.c index XXXXXXX..XXXXXXX 100644 --- a/qemu-io.c +++ b/qemu-io.c @@ -XXX,XX +XXX,XX @@ #include "qemu/readline.h" #include "qemu/log.h" #include "qapi/qmp/qstring.h" +#include "qapi/qmp/qbool.h" #include "qom/object_interfaces.h" #include "sysemu/block-backend.h" #include "block/block_int.h" @@ -XXX,XX +XXX,XX @@ static const cmdinfo_t close_cmd = { .oneline = "close the current open file", }; -static int openfile(char *name, int flags, bool writethrough, QDict *opts) +static int openfile(char *name, int flags, bool writethrough, bool force_share, + QDict *opts) { Error *local_err = NULL; BlockDriverState *bs; @@ -XXX,XX +XXX,XX @@ static int openfile(char *name, int flags, bool writethrough, QDict *opts) return 1; } + if (force_share) { + if (!opts) { + opts = qdict_new(); + } + if (qdict_haskey(opts, BDRV_OPT_FORCE_SHARE) + && !qdict_get_bool(opts, BDRV_OPT_FORCE_SHARE)) { + error_report("-U conflicts with image options"); + QDECREF(opts); + return 1; + } + qdict_put(opts, BDRV_OPT_FORCE_SHARE, qbool_from_bool(true)); + } qemuio_blk = blk_new_open(name, NULL, opts, flags, &local_err); if (!qemuio_blk) { error_reportf_err(local_err, "can't open%s%s: ", @@ -XXX,XX +XXX,XX @@ static void open_help(void) " -r, -- open file read-only\n" " -s, -- use snapshot file\n" " -n, -- disable host cache, short for -t none\n" +" -U, -- force shared permissions\n" " -k, -- use kernel AIO implementation (on Linux only)\n" " -t, -- use the given cache mode for the image\n" " -d, -- use the given discard mode for the image\n" @@ -XXX,XX +XXX,XX @@ static const cmdinfo_t open_cmd = { .argmin = 1, .argmax = -1, .flags = CMD_NOFILE_OK, - .args = "[-rsnk] [-t cache] [-d discard] [-o options] [path]", + .args = "[-rsnkU] [-t cache] [-d discard] [-o options] [path]", .oneline = "open the file specified by path", .help = open_help, }; @@ -XXX,XX +XXX,XX @@ static int open_f(BlockBackend *blk, int argc, char **argv) int c; QemuOpts *qopts; QDict *opts; + bool force_share = false; - while ((c = getopt(argc, argv, "snro:kt:d:")) != -1) { + while ((c = getopt(argc, argv, "snro:kt:d:U")) != -1) { switch (c) { case 's': flags |= BDRV_O_SNAPSHOT; @@ -XXX,XX +XXX,XX @@ static int open_f(BlockBackend *blk, int argc, char **argv) return 0; } break; + case 'U': + force_share = true; + break; default: qemu_opts_reset(&empty_opts); return qemuio_command_usage(&open_cmd); @@ -XXX,XX +XXX,XX @@ static int open_f(BlockBackend *blk, int argc, char **argv) qemu_opts_reset(&empty_opts); if (optind == argc - 1) { - return openfile(argv[optind], flags, writethrough, opts); + return openfile(argv[optind], flags, writethrough, force_share, opts); } else if (optind == argc) { - return openfile(NULL, flags, writethrough, opts); + return openfile(NULL, flags, writethrough, force_share, opts); } else { QDECREF(opts); return qemuio_command_usage(&open_cmd); @@ -XXX,XX +XXX,XX @@ static void usage(const char *name) " -T, --trace [[enable=]<pattern>][,events=<file>][,file=<file>]\n" " specify tracing options\n" " see qemu-img(1) man page for full description\n" +" -U, --force-share force shared permissions\n" " -h, --help display this help and exit\n" " -V, --version output version information and exit\n" "\n" @@ -XXX,XX +XXX,XX @@ static QemuOptsList file_opts = { int main(int argc, char **argv) { int readonly = 0; - const char *sopt = "hVc:d:f:rsnmkt:T:"; + const char *sopt = "hVc:d:f:rsnmkt:T:U"; const struct option lopt[] = { { "help", no_argument, NULL, 'h' }, { "version", no_argument, NULL, 'V' }, @@ -XXX,XX +XXX,XX @@ int main(int argc, char **argv) { "trace", required_argument, NULL, 'T' }, { "object", required_argument, NULL, OPTION_OBJECT }, { "image-opts", no_argument, NULL, OPTION_IMAGE_OPTS }, + { "force-share", no_argument, 0, 'U'}, { NULL, 0, NULL, 0 } }; int c; @@ -XXX,XX +XXX,XX @@ int main(int argc, char **argv) QDict *opts = NULL; const char *format = NULL; char *trace_file = NULL; + bool force_share = false; #ifdef CONFIG_POSIX signal(SIGPIPE, SIG_IGN); @@ -XXX,XX +XXX,XX @@ int main(int argc, char **argv) case 'h': usage(progname); exit(0); + case 'U': + force_share = true; + break; case OPTION_OBJECT: { QemuOpts *qopts; qopts = qemu_opts_parse_noisily(&qemu_object_opts, @@ -XXX,XX +XXX,XX @@ int main(int argc, char **argv) exit(1); } opts = qemu_opts_to_qdict(qopts, NULL); - if (openfile(NULL, flags, writethrough, opts)) { + if (openfile(NULL, flags, writethrough, force_share, opts)) { exit(1); } } else { @@ -XXX,XX +XXX,XX @@ int main(int argc, char **argv) opts = qdict_new(); qdict_put_str(opts, "driver", format); } - if (openfile(argv[optind], flags, writethrough, opts)) { + if (openfile(argv[optind], flags, writethrough, + force_share, opts)) { exit(1); } } -- 1.8.3.1 From: Fam Zheng <famz@redhat.com> qemu-img and qemu-io commands when guest is running need "-U" option, add it. Signed-off-by: Fam Zheng <famz@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com> --- tests/qemu-iotests/030 | 18 +++++++++--------- 1 file changed, 9 insertions(+), 9 deletions(-) diff --git a/tests/qemu-iotests/030 b/tests/qemu-iotests/030 index XXXXXXX..XXXXXXX 100755 --- a/tests/qemu-iotests/030 +++ b/tests/qemu-iotests/030 @@ -XXX,XX +XXX,XX @@ class TestSingleDrive(iotests.QMPTestCase): def test_stream_intermediate(self): self.assert_no_active_block_jobs() - self.assertNotEqual(qemu_io('-f', 'raw', '-c', 'map', backing_img), - qemu_io('-f', iotests.imgfmt, '-c', 'map', mid_img), + self.assertNotEqual(qemu_io('-f', 'raw', '-rU', '-c', 'map', backing_img), + qemu_io('-f', iotests.imgfmt, '-rU', '-c', 'map', mid_img), 'image file map matches backing file before streaming') result = self.vm.qmp('block-stream', device='mid', job_id='stream-mid') @@ -XXX,XX +XXX,XX @@ class TestSingleDrive(iotests.QMPTestCase): self.assert_no_active_block_jobs() # The image map is empty before the operation - empty_map = qemu_io('-f', iotests.imgfmt, '-c', 'map', test_img) + empty_map = qemu_io('-f', iotests.imgfmt, '-rU', '-c', 'map', test_img) # This is a no-op: no data should ever be copied from the base image result = self.vm.qmp('block-stream', device='drive0', base=mid_img) @@ -XXX,XX +XXX,XX @@ class TestParallelOps(iotests.QMPTestCase): # Check that the maps don't match before the streaming operations for i in range(2, self.num_imgs, 2): - self.assertNotEqual(qemu_io('-f', iotests.imgfmt, '-c', 'map', self.imgs[i]), - qemu_io('-f', iotests.imgfmt, '-c', 'map', self.imgs[i-1]), + self.assertNotEqual(qemu_io('-f', iotests.imgfmt, '-rU', '-c', 'map', self.imgs[i]), + qemu_io('-f', iotests.imgfmt, '-rU', '-c', 'map', self.imgs[i-1]), 'image file map matches backing file before streaming') # Create all streaming jobs @@ -XXX,XX +XXX,XX @@ class TestParallelOps(iotests.QMPTestCase): def test_stream_base_node_name(self): self.assert_no_active_block_jobs() - self.assertNotEqual(qemu_io('-f', iotests.imgfmt, '-c', 'map', self.imgs[4]), - qemu_io('-f', iotests.imgfmt, '-c', 'map', self.imgs[3]), + self.assertNotEqual(qemu_io('-f', iotests.imgfmt, '-rU', '-c', 'map', self.imgs[4]), + qemu_io('-f', iotests.imgfmt, '-rU', '-c', 'map', self.imgs[3]), 'image file map matches backing file before streaming') # Error: the base node does not exist @@ -XXX,XX +XXX,XX @@ class TestQuorum(iotests.QMPTestCase): if not iotests.supports_quorum(): return - self.assertNotEqual(qemu_io('-f', iotests.imgfmt, '-c', 'map', self.children[0]), - qemu_io('-f', iotests.imgfmt, '-c', 'map', self.backing[0]), + self.assertNotEqual(qemu_io('-f', iotests.imgfmt, '-rU', '-c', 'map', self.children[0]), + qemu_io('-f', iotests.imgfmt, '-rU', '-c', 'map', self.backing[0]), 'image file map matches backing file before streaming') self.assert_no_active_block_jobs() -- 1.8.3.1 From: Fam Zheng <famz@redhat.com> The qemu-img info command is executed while VM is running, add -U option to avoid the image locking error. Signed-off-by: Fam Zheng <famz@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com> --- tests/qemu-iotests/046 | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/tests/qemu-iotests/046 b/tests/qemu-iotests/046 index XXXXXXX..XXXXXXX 100755 --- a/tests/qemu-iotests/046 +++ b/tests/qemu-iotests/046 @@ -XXX,XX +XXX,XX @@ echo "== Verify image content ==" function verify_io() { - if ($QEMU_IMG info -f "$IMGFMT" "$TEST_IMG" | grep "compat: 0.10" > /dev/null); then + if ($QEMU_IMG info -U -f "$IMGFMT" "$TEST_IMG" | grep "compat: 0.10" > /dev/null); then # For v2 images, discarded clusters are read from the backing file # Keep the variable empty so that the backing file value can be used as # the default below -- 1.8.3.1 From: Fam Zheng <famz@redhat.com> Double attach is not a valid usage of the target image, drive-backup will open the blockdev itself so skip the add_drive call in this case. Signed-off-by: Fam Zheng <famz@redhat.com> Reviewed-by: Max Reitz <mreitz@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com> --- tests/qemu-iotests/055 | 32 ++++++++++++++++++-------------- 1 file changed, 18 insertions(+), 14 deletions(-) diff --git a/tests/qemu-iotests/055 b/tests/qemu-iotests/055 index XXXXXXX..XXXXXXX 100755 --- a/tests/qemu-iotests/055 +++ b/tests/qemu-iotests/055 @@ -XXX,XX +XXX,XX @@ class TestDriveCompression(iotests.QMPTestCase): except OSError: pass - def do_prepare_drives(self, fmt, args): + def do_prepare_drives(self, fmt, args, attach_target): self.vm = iotests.VM().add_drive(test_img) qemu_img('create', '-f', fmt, blockdev_target_img, str(TestDriveCompression.image_len), *args) - self.vm.add_drive(blockdev_target_img, format=fmt, interface="none") + if attach_target: + self.vm.add_drive(blockdev_target_img, format=fmt, interface="none") self.vm.launch() - def do_test_compress_complete(self, cmd, format, **args): - self.do_prepare_drives(format['type'], format['args']) + def do_test_compress_complete(self, cmd, format, attach_target, **args): + self.do_prepare_drives(format['type'], format['args'], attach_target) self.assert_no_active_block_jobs() @@ -XXX,XX +XXX,XX @@ class TestDriveCompression(iotests.QMPTestCase): def test_complete_compress_drive_backup(self): for format in TestDriveCompression.fmt_supports_compression: - self.do_test_compress_complete('drive-backup', format, + self.do_test_compress_complete('drive-backup', format, False, target=blockdev_target_img, mode='existing') def test_complete_compress_blockdev_backup(self): for format in TestDriveCompression.fmt_supports_compression: - self.do_test_compress_complete('blockdev-backup', format, target='drive1') + self.do_test_compress_complete('blockdev-backup', format, True, + target='drive1') - def do_test_compress_cancel(self, cmd, format, **args): - self.do_prepare_drives(format['type'], format['args']) + def do_test_compress_cancel(self, cmd, format, attach_target, **args): + self.do_prepare_drives(format['type'], format['args'], attach_target) self.assert_no_active_block_jobs() @@ -XXX,XX +XXX,XX @@ class TestDriveCompression(iotests.QMPTestCase): def test_compress_cancel_drive_backup(self): for format in TestDriveCompression.fmt_supports_compression: - self.do_test_compress_cancel('drive-backup', format, + self.do_test_compress_cancel('drive-backup', format, False, target=blockdev_target_img, mode='existing') def test_compress_cancel_blockdev_backup(self): for format in TestDriveCompression.fmt_supports_compression: - self.do_test_compress_cancel('blockdev-backup', format, target='drive1') + self.do_test_compress_cancel('blockdev-backup', format, True, + target='drive1') - def do_test_compress_pause(self, cmd, format, **args): - self.do_prepare_drives(format['type'], format['args']) + def do_test_compress_pause(self, cmd, format, attach_target, **args): + self.do_prepare_drives(format['type'], format['args'], attach_target) self.assert_no_active_block_jobs() @@ -XXX,XX +XXX,XX @@ class TestDriveCompression(iotests.QMPTestCase): def test_compress_pause_drive_backup(self): for format in TestDriveCompression.fmt_supports_compression: - self.do_test_compress_pause('drive-backup', format, + self.do_test_compress_pause('drive-backup', format, False, target=blockdev_target_img, mode='existing') def test_compress_pause_blockdev_backup(self): for format in TestDriveCompression.fmt_supports_compression: - self.do_test_compress_pause('blockdev-backup', format, target='drive1') + self.do_test_compress_pause('blockdev-backup', format, True, + target='drive1') if __name__ == '__main__': iotests.main(supported_fmts=['raw', 'qcow2']) -- 1.8.3.1 From: Fam Zheng <famz@redhat.com> In the case where we test the expected error when a blockdev-snapshot target already has a backing image, the backing chain is opened multiple times. This will be a problem when we use image locking, so use a different backing file that is not already open. Signed-off-by: Fam Zheng <famz@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com> --- tests/qemu-iotests/085 | 33 +++++++++++++++++++-------------- tests/qemu-iotests/085.out | 3 ++- 2 files changed, 21 insertions(+), 15 deletions(-) diff --git a/tests/qemu-iotests/085 b/tests/qemu-iotests/085 index XXXXXXX..XXXXXXX 100755 --- a/tests/qemu-iotests/085 +++ b/tests/qemu-iotests/085 @@ -XXX,XX +XXX,XX @@ _cleanup() rm -f "${TEST_DIR}/${i}-${snapshot_virt0}" rm -f "${TEST_DIR}/${i}-${snapshot_virt1}" done - rm -f "${TEST_IMG}.1" "${TEST_IMG}.2" + rm -f "${TEST_IMG}" "${TEST_IMG}.1" "${TEST_IMG}.2" "${TEST_IMG}.base" } trap "_cleanup; exit \$status" 0 1 2 3 15 @@ -XXX,XX +XXX,XX @@ function create_group_snapshot() } # ${1}: unique identifier for the snapshot filename -# ${2}: true: open backing images; false: don't open them (default) +# ${2}: extra_params to the blockdev-add command +# ${3}: filename +function do_blockdev_add() +{ + cmd="{ 'execute': 'blockdev-add', 'arguments': + { 'driver': 'qcow2', 'node-name': 'snap_${1}', ${2} + 'file': + { 'driver': 'file', 'filename': '${3}', + 'node-name': 'file_${1}' } } }" + _send_qemu_cmd $h "${cmd}" "return" +} + +# ${1}: unique identifier for the snapshot filename function add_snapshot_image() { - if [ "${2}" = "true" ]; then - extra_params="" - else - extra_params="'backing': '', " - fi base_image="${TEST_DIR}/$((${1}-1))-${snapshot_virt0}" snapshot_file="${TEST_DIR}/${1}-${snapshot_virt0}" _make_test_img -b "${base_image}" "$size" mv "${TEST_IMG}" "${snapshot_file}" - cmd="{ 'execute': 'blockdev-add', 'arguments': - { 'driver': 'qcow2', 'node-name': 'snap_${1}', ${extra_params} - 'file': - { 'driver': 'file', 'filename': '${snapshot_file}', - 'node-name': 'file_${1}' } } }" - _send_qemu_cmd $h "${cmd}" "return" + do_blockdev_add "$1" "'backing': '', " "${snapshot_file}" } # ${1}: unique identifier for the snapshot filename @@ -XXX,XX +XXX,XX @@ echo === Invalid command - snapshot node has a backing image === echo SNAPSHOTS=$((${SNAPSHOTS}+1)) -add_snapshot_image ${SNAPSHOTS} true + +TEST_IMG="$TEST_IMG.base" _make_test_img "$size" +_make_test_img -b "${TEST_IMG}.base" "$size" +do_blockdev_add ${SNAPSHOTS} "" "${TEST_IMG}" blockdev_snapshot ${SNAPSHOTS} error echo diff --git a/tests/qemu-iotests/085.out b/tests/qemu-iotests/085.out index XXXXXXX..XXXXXXX 100644 --- a/tests/qemu-iotests/085.out +++ b/tests/qemu-iotests/085.out @@ -XXX,XX +XXX,XX @@ Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=134217728 backing_file=TEST_DIR/ === Invalid command - snapshot node has a backing image === -Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=134217728 backing_file=TEST_DIR/12-snapshot-v0.IMGFMT +Formatting 'TEST_DIR/t.IMGFMT.base', fmt=IMGFMT size=134217728 +Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=134217728 backing_file=TEST_DIR/t.IMGFMT.base {"return": {}} {"error": {"class": "GenericError", "desc": "The snapshot already has a backing image"}} -- 1.8.3.1 From: Fam Zheng <famz@redhat.com> The test scenario doesn't require the same image, instead it focuses on the duplicated node-name, so use null-co to avoid locking conflict. Reviewed-by: Max Reitz <mreitz@redhat.com> Signed-off-by: Fam Zheng <famz@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com> --- tests/qemu-iotests/087 | 6 ++---- 1 file changed, 2 insertions(+), 4 deletions(-) diff --git a/tests/qemu-iotests/087 b/tests/qemu-iotests/087 index XXXXXXX..XXXXXXX 100755 --- a/tests/qemu-iotests/087 +++ b/tests/qemu-iotests/087 @@ -XXX,XX +XXX,XX @@ run_qemu -drive driver=$IMGFMT,id=disk,node-name=test-node,file="$TEST_IMG" <<EO "driver": "$IMGFMT", "node-name": "disk", "file": { - "driver": "file", - "filename": "$TEST_IMG" + "driver": "null-co" } } } @@ -XXX,XX +XXX,XX @@ run_qemu -drive driver=$IMGFMT,id=disk,node-name=test-node,file="$TEST_IMG" <<EO "driver": "$IMGFMT", "node-name": "test-node", "file": { - "driver": "file", - "filename": "$TEST_IMG" + "driver": "null-co" } } } -- 1.8.3.1 From: Fam Zheng <famz@redhat.com> Signed-off-by: Fam Zheng <famz@redhat.com> Reviewed-by: Max Reitz <mreitz@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com> --- tests/qemu-iotests/091 | 2 ++ 1 file changed, 2 insertions(+) diff --git a/tests/qemu-iotests/091 b/tests/qemu-iotests/091 index XXXXXXX..XXXXXXX 100755 --- a/tests/qemu-iotests/091 +++ b/tests/qemu-iotests/091 @@ -XXX,XX +XXX,XX @@ echo "vm2: qemu process running successfully" echo "vm2: flush io, and quit" _send_qemu_cmd $h2 'qemu-io disk flush' "(qemu)" _send_qemu_cmd $h2 'quit' "" +_send_qemu_cmd $h1 'quit' "" +wait echo "Check image pattern" ${QEMU_IO} -c "read -P 0x22 0 4M" "${TEST_IMG}" | _filter_testdir | _filter_qemu_io -- 1.8.3.1 From: Fam Zheng <famz@redhat.com> To avoid image lock failures. Signed-off-by: Fam Zheng <famz@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com> --- tests/qemu-iotests/172 | 55 +++++++++++++++++++++++++--------------------- tests/qemu-iotests/172.out | 50 +++++++++++++++++++++-------------------- 2 files changed, 56 insertions(+), 49 deletions(-) diff --git a/tests/qemu-iotests/172 b/tests/qemu-iotests/172 index XXXXXXX..XXXXXXX 100755 --- a/tests/qemu-iotests/172 +++ b/tests/qemu-iotests/172 @@ -XXX,XX +XXX,XX @@ status=1 # failure is the default! _cleanup() { _cleanup_test_img + rm -f "$TEST_IMG.2" + rm -f "$TEST_IMG.3" } trap "_cleanup; exit \$status" 0 1 2 3 15 @@ -XXX,XX +XXX,XX @@ size=720k _make_test_img $size +TEST_IMG="$TEST_IMG.2" _make_test_img $size +TEST_IMG="$TEST_IMG.3" _make_test_img $size + # Default drive semantics: # # By default you get a single empty floppy drive. You can override it with @@ -XXX,XX +XXX,XX @@ echo === Using -fda/-fdb options === check_floppy_qtree -fda "$TEST_IMG" check_floppy_qtree -fdb "$TEST_IMG" -check_floppy_qtree -fda "$TEST_IMG" -fdb "$TEST_IMG" +check_floppy_qtree -fda "$TEST_IMG" -fdb "$TEST_IMG.2" echo @@ -XXX,XX +XXX,XX @@ echo === Using -drive options === check_floppy_qtree -drive if=floppy,file="$TEST_IMG" check_floppy_qtree -drive if=floppy,file="$TEST_IMG",index=1 -check_floppy_qtree -drive if=floppy,file="$TEST_IMG" -drive if=floppy,file="$TEST_IMG",index=1 +check_floppy_qtree -drive if=floppy,file="$TEST_IMG" -drive if=floppy,file="$TEST_IMG.2",index=1 echo echo @@ -XXX,XX +XXX,XX @@ echo === Using -drive if=none and -global === check_floppy_qtree -drive if=none,file="$TEST_IMG" -global isa-fdc.driveA=none0 check_floppy_qtree -drive if=none,file="$TEST_IMG" -global isa-fdc.driveB=none0 -check_floppy_qtree -drive if=none,file="$TEST_IMG" -drive if=none,file="$TEST_IMG" \ +check_floppy_qtree -drive if=none,file="$TEST_IMG" -drive if=none,file="$TEST_IMG.2" \ -global isa-fdc.driveA=none0 -global isa-fdc.driveB=none1 echo @@ -XXX,XX +XXX,XX @@ echo === Using -drive if=none and -device === check_floppy_qtree -drive if=none,file="$TEST_IMG" -device floppy,drive=none0 check_floppy_qtree -drive if=none,file="$TEST_IMG" -device floppy,drive=none0,unit=1 -check_floppy_qtree -drive if=none,file="$TEST_IMG" -drive if=none,file="$TEST_IMG" \ +check_floppy_qtree -drive if=none,file="$TEST_IMG" -drive if=none,file="$TEST_IMG.2" \ -device floppy,drive=none0 -device floppy,drive=none1,unit=1 echo @@ -XXX,XX +XXX,XX @@ echo echo === Mixing -fdX and -global === # Working -check_floppy_qtree -fda "$TEST_IMG" -drive if=none,file="$TEST_IMG" -global isa-fdc.driveB=none0 -check_floppy_qtree -fdb "$TEST_IMG" -drive if=none,file="$TEST_IMG" -global isa-fdc.driveA=none0 +check_floppy_qtree -fda "$TEST_IMG" -drive if=none,file="$TEST_IMG.2" -global isa-fdc.driveB=none0 +check_floppy_qtree -fdb "$TEST_IMG" -drive if=none,file="$TEST_IMG.2" -global isa-fdc.driveA=none0 # Conflicting (-fdX wins) -check_floppy_qtree -fda "$TEST_IMG" -drive if=none,file="$TEST_IMG" -global isa-fdc.driveA=none0 -check_floppy_qtree -fdb "$TEST_IMG" -drive if=none,file="$TEST_IMG" -global isa-fdc.driveB=none0 +check_floppy_qtree -fda "$TEST_IMG" -drive if=none,file="$TEST_IMG.2" -global isa-fdc.driveA=none0 +check_floppy_qtree -fdb "$TEST_IMG" -drive if=none,file="$TEST_IMG.2" -global isa-fdc.driveB=none0 echo echo echo === Mixing -fdX and -device === # Working -check_floppy_qtree -fda "$TEST_IMG" -drive if=none,file="$TEST_IMG" -device floppy,drive=none0 -check_floppy_qtree -fda "$TEST_IMG" -drive if=none,file="$TEST_IMG" -device floppy,drive=none0,unit=1 +check_floppy_qtree -fda "$TEST_IMG" -drive if=none,file="$TEST_IMG.2" -device floppy,drive=none0 +check_floppy_qtree -fda "$TEST_IMG" -drive if=none,file="$TEST_IMG.2" -device floppy,drive=none0,unit=1 -check_floppy_qtree -fdb "$TEST_IMG" -drive if=none,file="$TEST_IMG" -device floppy,drive=none0 -check_floppy_qtree -fdb "$TEST_IMG" -drive if=none,file="$TEST_IMG" -device floppy,drive=none0,unit=0 +check_floppy_qtree -fdb "$TEST_IMG" -drive if=none,file="$TEST_IMG.2" -device floppy,drive=none0 +check_floppy_qtree -fdb "$TEST_IMG" -drive if=none,file="$TEST_IMG.2" -device floppy,drive=none0,unit=0 # Conflicting -check_floppy_qtree -fda "$TEST_IMG" -drive if=none,file="$TEST_IMG" -device floppy,drive=none0,unit=0 -check_floppy_qtree -fdb "$TEST_IMG" -drive if=none,file="$TEST_IMG" -device floppy,drive=none0,unit=1 +check_floppy_qtree -fda "$TEST_IMG" -drive if=none,file="$TEST_IMG.2" -device floppy,drive=none0,unit=0 +check_floppy_qtree -fdb "$TEST_IMG" -drive if=none,file="$TEST_IMG.2" -device floppy,drive=none0,unit=1 echo echo echo === Mixing -drive and -device === # Working -check_floppy_qtree -drive if=floppy,file="$TEST_IMG" -drive if=none,file="$TEST_IMG" -device floppy,drive=none0 -check_floppy_qtree -drive if=floppy,file="$TEST_IMG" -drive if=none,file="$TEST_IMG" -device floppy,drive=none0,unit=1 +check_floppy_qtree -drive if=floppy,file="$TEST_IMG" -drive if=none,file="$TEST_IMG.2" -device floppy,drive=none0 +check_floppy_qtree -drive if=floppy,file="$TEST_IMG" -drive if=none,file="$TEST_IMG.2" -device floppy,drive=none0,unit=1 # Conflicting -check_floppy_qtree -drive if=floppy,file="$TEST_IMG" -drive if=none,file="$TEST_IMG" -device floppy,drive=none0,unit=0 +check_floppy_qtree -drive if=floppy,file="$TEST_IMG" -drive if=none,file="$TEST_IMG.2" -device floppy,drive=none0,unit=0 echo echo echo === Mixing -global and -device === # Working -check_floppy_qtree -drive if=none,file="$TEST_IMG" -drive if=none,file="$TEST_IMG" \ +check_floppy_qtree -drive if=none,file="$TEST_IMG" -drive if=none,file="$TEST_IMG.2" \ -global isa-fdc.driveA=none0 -device floppy,drive=none1 -check_floppy_qtree -drive if=none,file="$TEST_IMG" -drive if=none,file="$TEST_IMG" \ +check_floppy_qtree -drive if=none,file="$TEST_IMG" -drive if=none,file="$TEST_IMG.2" \ -global isa-fdc.driveA=none0 -device floppy,drive=none1,unit=1 -check_floppy_qtree -drive if=none,file="$TEST_IMG" -drive if=none,file="$TEST_IMG" \ +check_floppy_qtree -drive if=none,file="$TEST_IMG" -drive if=none,file="$TEST_IMG.2" \ -global isa-fdc.driveB=none0 -device floppy,drive=none1 -check_floppy_qtree -drive if=none,file="$TEST_IMG" -drive if=none,file="$TEST_IMG" \ +check_floppy_qtree -drive if=none,file="$TEST_IMG" -drive if=none,file="$TEST_IMG.2" \ -global isa-fdc.driveB=none0 -device floppy,drive=none1,unit=0 # Conflicting -check_floppy_qtree -drive if=none,file="$TEST_IMG" -drive if=none,file="$TEST_IMG" \ +check_floppy_qtree -drive if=none,file="$TEST_IMG" -drive if=none,file="$TEST_IMG.2" \ -global isa-fdc.driveA=none0 -device floppy,drive=none1,unit=0 -check_floppy_qtree -drive if=none,file="$TEST_IMG" -drive if=none,file="$TEST_IMG" \ +check_floppy_qtree -drive if=none,file="$TEST_IMG" -drive if=none,file="$TEST_IMG.2" \ -global isa-fdc.driveB=none0 -device floppy,drive=none1,unit=1 echo @@ -XXX,XX +XXX,XX @@ echo === Too many floppy drives === # Working check_floppy_qtree -drive if=floppy,file="$TEST_IMG" \ - -drive if=none,file="$TEST_IMG" \ - -drive if=none,file="$TEST_IMG" \ + -drive if=none,file="$TEST_IMG.2" \ + -drive if=none,file="$TEST_IMG.3" \ -global isa-fdc.driveB=none0 \ -device floppy,drive=none1 diff --git a/tests/qemu-iotests/172.out b/tests/qemu-iotests/172.out index XXXXXXX..XXXXXXX 100644 --- a/tests/qemu-iotests/172.out +++ b/tests/qemu-iotests/172.out @@ -XXX,XX +XXX,XX @@ QA output created by 172 Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=737280 +Formatting 'TEST_DIR/t.IMGFMT.2', fmt=IMGFMT size=737280 +Formatting 'TEST_DIR/t.IMGFMT.3', fmt=IMGFMT size=737280 === Default === @@ -XXX,XX +XXX,XX @@ Testing: -fdb TEST_DIR/t.qcow2 share-rw = false drive-type = "288" -Testing: -fda TEST_DIR/t.qcow2 -fdb TEST_DIR/t.qcow2 +Testing: -fda TEST_DIR/t.qcow2 -fdb TEST_DIR/t.qcow2.2 dev: isa-fdc, id "" iobase = 1008 (0x3f0) @@ -XXX,XX +XXX,XX @@ Testing: -drive if=floppy,file=TEST_DIR/t.qcow2,index=1 share-rw = false drive-type = "288" -Testing: -drive if=floppy,file=TEST_DIR/t.qcow2 -drive if=floppy,file=TEST_DIR/t.qcow2,index=1 +Testing: -drive if=floppy,file=TEST_DIR/t.qcow2 -drive if=floppy,file=TEST_DIR/t.qcow2.2,index=1 dev: isa-fdc, id "" iobase = 1008 (0x3f0) @@ -XXX,XX +XXX,XX @@ Testing: -drive if=none,file=TEST_DIR/t.qcow2 -global isa-fdc.driveB=none0 share-rw = false drive-type = "144" -Testing: -drive if=none,file=TEST_DIR/t.qcow2 -drive if=none,file=TEST_DIR/t.qcow2 -global isa-fdc.driveA=none0 -global isa-fdc.driveB=none1 +Testing: -drive if=none,file=TEST_DIR/t.qcow2 -drive if=none,file=TEST_DIR/t.qcow2.2 -global isa-fdc.driveA=none0 -global isa-fdc.driveB=none1 dev: isa-fdc, id "" iobase = 1008 (0x3f0) @@ -XXX,XX +XXX,XX @@ Testing: -drive if=none,file=TEST_DIR/t.qcow2 -device floppy,drive=none0,unit=1 share-rw = false drive-type = "144" -Testing: -drive if=none,file=TEST_DIR/t.qcow2 -drive if=none,file=TEST_DIR/t.qcow2 -device floppy,drive=none0 -device floppy,drive=none1,unit=1 +Testing: -drive if=none,file=TEST_DIR/t.qcow2 -drive if=none,file=TEST_DIR/t.qcow2.2 -device floppy,drive=none0 -device floppy,drive=none1,unit=1 dev: isa-fdc, id "" iobase = 1008 (0x3f0) @@ -XXX,XX +XXX,XX @@ Testing: -drive if=none,file=TEST_DIR/t.qcow2 -drive if=none,file=TEST_DIR/t.qco === Mixing -fdX and -global === -Testing: -fda TEST_DIR/t.qcow2 -drive if=none,file=TEST_DIR/t.qcow2 -global isa-fdc.driveB=none0 +Testing: -fda TEST_DIR/t.qcow2 -drive if=none,file=TEST_DIR/t.qcow2.2 -global isa-fdc.driveB=none0 dev: isa-fdc, id "" iobase = 1008 (0x3f0) @@ -XXX,XX +XXX,XX @@ Testing: -fda TEST_DIR/t.qcow2 -drive if=none,file=TEST_DIR/t.qcow2 -global isa- share-rw = false drive-type = "144" -Testing: -fdb TEST_DIR/t.qcow2 -drive if=none,file=TEST_DIR/t.qcow2 -global isa-fdc.driveA=none0 +Testing: -fdb TEST_DIR/t.qcow2 -drive if=none,file=TEST_DIR/t.qcow2.2 -global isa-fdc.driveA=none0 dev: isa-fdc, id "" iobase = 1008 (0x3f0) @@ -XXX,XX +XXX,XX @@ Testing: -fdb TEST_DIR/t.qcow2 -drive if=none,file=TEST_DIR/t.qcow2 -global isa- share-rw = false drive-type = "144" -Testing: -fda TEST_DIR/t.qcow2 -drive if=none,file=TEST_DIR/t.qcow2 -global isa-fdc.driveA=none0 +Testing: -fda TEST_DIR/t.qcow2 -drive if=none,file=TEST_DIR/t.qcow2.2 -global isa-fdc.driveA=none0 dev: isa-fdc, id "" iobase = 1008 (0x3f0) @@ -XXX,XX +XXX,XX @@ Testing: -fda TEST_DIR/t.qcow2 -drive if=none,file=TEST_DIR/t.qcow2 -global isa- share-rw = false drive-type = "144" -Testing: -fdb TEST_DIR/t.qcow2 -drive if=none,file=TEST_DIR/t.qcow2 -global isa-fdc.driveB=none0 +Testing: -fdb TEST_DIR/t.qcow2 -drive if=none,file=TEST_DIR/t.qcow2.2 -global isa-fdc.driveB=none0 dev: isa-fdc, id "" iobase = 1008 (0x3f0) @@ -XXX,XX +XXX,XX @@ Testing: -fdb TEST_DIR/t.qcow2 -drive if=none,file=TEST_DIR/t.qcow2 -global isa- === Mixing -fdX and -device === -Testing: -fda TEST_DIR/t.qcow2 -drive if=none,file=TEST_DIR/t.qcow2 -device floppy,drive=none0 +Testing: -fda TEST_DIR/t.qcow2 -drive if=none,file=TEST_DIR/t.qcow2.2 -device floppy,drive=none0 dev: isa-fdc, id "" iobase = 1008 (0x3f0) @@ -XXX,XX +XXX,XX @@ Testing: -fda TEST_DIR/t.qcow2 -drive if=none,file=TEST_DIR/t.qcow2 -device flop share-rw = false drive-type = "144" -Testing: -fda TEST_DIR/t.qcow2 -drive if=none,file=TEST_DIR/t.qcow2 -device floppy,drive=none0,unit=1 +Testing: -fda TEST_DIR/t.qcow2 -drive if=none,file=TEST_DIR/t.qcow2.2 -device floppy,drive=none0,unit=1 dev: isa-fdc, id "" iobase = 1008 (0x3f0) @@ -XXX,XX +XXX,XX @@ Testing: -fda TEST_DIR/t.qcow2 -drive if=none,file=TEST_DIR/t.qcow2 -device flop share-rw = false drive-type = "144" -Testing: -fdb TEST_DIR/t.qcow2 -drive if=none,file=TEST_DIR/t.qcow2 -device floppy,drive=none0 +Testing: -fdb TEST_DIR/t.qcow2 -drive if=none,file=TEST_DIR/t.qcow2.2 -device floppy,drive=none0 dev: isa-fdc, id "" iobase = 1008 (0x3f0) @@ -XXX,XX +XXX,XX @@ Testing: -fdb TEST_DIR/t.qcow2 -drive if=none,file=TEST_DIR/t.qcow2 -device flop share-rw = false drive-type = "144" -Testing: -fdb TEST_DIR/t.qcow2 -drive if=none,file=TEST_DIR/t.qcow2 -device floppy,drive=none0,unit=0 +Testing: -fdb TEST_DIR/t.qcow2 -drive if=none,file=TEST_DIR/t.qcow2.2 -device floppy,drive=none0,unit=0 dev: isa-fdc, id "" iobase = 1008 (0x3f0) @@ -XXX,XX +XXX,XX @@ Testing: -fdb TEST_DIR/t.qcow2 -drive if=none,file=TEST_DIR/t.qcow2 -device flop share-rw = false drive-type = "144" -Testing: -fda TEST_DIR/t.qcow2 -drive if=none,file=TEST_DIR/t.qcow2 -device floppy,drive=none0,unit=0 +Testing: -fda TEST_DIR/t.qcow2 -drive if=none,file=TEST_DIR/t.qcow2.2 -device floppy,drive=none0,unit=0 QEMU_PROG: -device floppy,drive=none0,unit=0: Floppy unit 0 is in use QEMU_PROG: -device floppy,drive=none0,unit=0: Device initialization failed. -Testing: -fdb TEST_DIR/t.qcow2 -drive if=none,file=TEST_DIR/t.qcow2 -device floppy,drive=none0,unit=1 +Testing: -fdb TEST_DIR/t.qcow2 -drive if=none,file=TEST_DIR/t.qcow2.2 -device floppy,drive=none0,unit=1 QEMU_PROG: -device floppy,drive=none0,unit=1: Floppy unit 1 is in use QEMU_PROG: -device floppy,drive=none0,unit=1: Device initialization failed. === Mixing -drive and -device === -Testing: -drive if=floppy,file=TEST_DIR/t.qcow2 -drive if=none,file=TEST_DIR/t.qcow2 -device floppy,drive=none0 +Testing: -drive if=floppy,file=TEST_DIR/t.qcow2 -drive if=none,file=TEST_DIR/t.qcow2.2 -device floppy,drive=none0 dev: isa-fdc, id "" iobase = 1008 (0x3f0) @@ -XXX,XX +XXX,XX @@ Testing: -drive if=floppy,file=TEST_DIR/t.qcow2 -drive if=none,file=TEST_DIR/t.q share-rw = false drive-type = "144" -Testing: -drive if=floppy,file=TEST_DIR/t.qcow2 -drive if=none,file=TEST_DIR/t.qcow2 -device floppy,drive=none0,unit=1 +Testing: -drive if=floppy,file=TEST_DIR/t.qcow2 -drive if=none,file=TEST_DIR/t.qcow2.2 -device floppy,drive=none0,unit=1 dev: isa-fdc, id "" iobase = 1008 (0x3f0) @@ -XXX,XX +XXX,XX @@ Testing: -drive if=floppy,file=TEST_DIR/t.qcow2 -drive if=none,file=TEST_DIR/t.q share-rw = false drive-type = "144" -Testing: -drive if=floppy,file=TEST_DIR/t.qcow2 -drive if=none,file=TEST_DIR/t.qcow2 -device floppy,drive=none0,unit=0 +Testing: -drive if=floppy,file=TEST_DIR/t.qcow2 -drive if=none,file=TEST_DIR/t.qcow2.2 -device floppy,drive=none0,unit=0 QEMU_PROG: -device floppy,drive=none0,unit=0: Floppy unit 0 is in use QEMU_PROG: -device floppy,drive=none0,unit=0: Device initialization failed. === Mixing -global and -device === -Testing: -drive if=none,file=TEST_DIR/t.qcow2 -drive if=none,file=TEST_DIR/t.qcow2 -global isa-fdc.driveA=none0 -device floppy,drive=none1 +Testing: -drive if=none,file=TEST_DIR/t.qcow2 -drive if=none,file=TEST_DIR/t.qcow2.2 -global isa-fdc.driveA=none0 -device floppy,drive=none1 dev: isa-fdc, id "" iobase = 1008 (0x3f0) @@ -XXX,XX +XXX,XX @@ Testing: -drive if=none,file=TEST_DIR/t.qcow2 -drive if=none,file=TEST_DIR/t.qco share-rw = false drive-type = "144" -Testing: -drive if=none,file=TEST_DIR/t.qcow2 -drive if=none,file=TEST_DIR/t.qcow2 -global isa-fdc.driveA=none0 -device floppy,drive=none1,unit=1 +Testing: -drive if=none,file=TEST_DIR/t.qcow2 -drive if=none,file=TEST_DIR/t.qcow2.2 -global isa-fdc.driveA=none0 -device floppy,drive=none1,unit=1 dev: isa-fdc, id "" iobase = 1008 (0x3f0) @@ -XXX,XX +XXX,XX @@ Testing: -drive if=none,file=TEST_DIR/t.qcow2 -drive if=none,file=TEST_DIR/t.qco share-rw = false drive-type = "144" -Testing: -drive if=none,file=TEST_DIR/t.qcow2 -drive if=none,file=TEST_DIR/t.qcow2 -global isa-fdc.driveB=none0 -device floppy,drive=none1 +Testing: -drive if=none,file=TEST_DIR/t.qcow2 -drive if=none,file=TEST_DIR/t.qcow2.2 -global isa-fdc.driveB=none0 -device floppy,drive=none1 dev: isa-fdc, id "" iobase = 1008 (0x3f0) @@ -XXX,XX +XXX,XX @@ Testing: -drive if=none,file=TEST_DIR/t.qcow2 -drive if=none,file=TEST_DIR/t.qco share-rw = false drive-type = "144" -Testing: -drive if=none,file=TEST_DIR/t.qcow2 -drive if=none,file=TEST_DIR/t.qcow2 -global isa-fdc.driveB=none0 -device floppy,drive=none1,unit=0 +Testing: -drive if=none,file=TEST_DIR/t.qcow2 -drive if=none,file=TEST_DIR/t.qcow2.2 -global isa-fdc.driveB=none0 -device floppy,drive=none1,unit=0 dev: isa-fdc, id "" iobase = 1008 (0x3f0) @@ -XXX,XX +XXX,XX @@ Testing: -drive if=none,file=TEST_DIR/t.qcow2 -drive if=none,file=TEST_DIR/t.qco share-rw = false drive-type = "144" -Testing: -drive if=none,file=TEST_DIR/t.qcow2 -drive if=none,file=TEST_DIR/t.qcow2 -global isa-fdc.driveA=none0 -device floppy,drive=none1,unit=0 +Testing: -drive if=none,file=TEST_DIR/t.qcow2 -drive if=none,file=TEST_DIR/t.qcow2.2 -global isa-fdc.driveA=none0 -device floppy,drive=none1,unit=0 QEMU_PROG: -device floppy,drive=none1,unit=0: Floppy unit 0 is in use QEMU_PROG: -device floppy,drive=none1,unit=0: Device initialization failed. -Testing: -drive if=none,file=TEST_DIR/t.qcow2 -drive if=none,file=TEST_DIR/t.qcow2 -global isa-fdc.driveB=none0 -device floppy,drive=none1,unit=1 +Testing: -drive if=none,file=TEST_DIR/t.qcow2 -drive if=none,file=TEST_DIR/t.qcow2.2 -global isa-fdc.driveB=none0 -device floppy,drive=none1,unit=1 QEMU_PROG: -device floppy,drive=none1,unit=1: Floppy unit 1 is in use QEMU_PROG: -device floppy,drive=none1,unit=1: Device initialization failed. === Too many floppy drives === -Testing: -drive if=floppy,file=TEST_DIR/t.qcow2 -drive if=none,file=TEST_DIR/t.qcow2 -drive if=none,file=TEST_DIR/t.qcow2 -global isa-fdc.driveB=none0 -device floppy,drive=none1 +Testing: -drive if=floppy,file=TEST_DIR/t.qcow2 -drive if=none,file=TEST_DIR/t.qcow2.2 -drive if=none,file=TEST_DIR/t.qcow2.3 -global isa-fdc.driveB=none0 -device floppy,drive=none1 QEMU_PROG: -device floppy,drive=none1: Can't create floppy unit 2, bus supports only 2 units QEMU_PROG: -device floppy,drive=none1: Device initialization failed. -- 1.8.3.1 From: Fam Zheng <famz@redhat.com> Signed-off-by: Fam Zheng <famz@redhat.com> Reviewed-by: Max Reitz <mreitz@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com> --- tests/drive_del-test.c | 2 +- tests/nvme-test.c | 2 +- tests/usb-hcd-uhci-test.c | 2 +- tests/usb-hcd-xhci-test.c | 2 +- tests/virtio-blk-test.c | 2 +- tests/virtio-scsi-test.c | 5 +++-- 6 files changed, 8 insertions(+), 7 deletions(-) diff --git a/tests/drive_del-test.c b/tests/drive_del-test.c index XXXXXXX..XXXXXXX 100644 --- a/tests/drive_del-test.c +++ b/tests/drive_del-test.c @@ -XXX,XX +XXX,XX @@ static void test_after_failed_device_add(void) static void test_drive_del_device_del(void) { /* Start with a drive used by a device that unplugs instantaneously */ - qtest_start("-drive if=none,id=drive0,file=/dev/null,format=raw" + qtest_start("-drive if=none,id=drive0,file=null-co://,format=raw" " -device virtio-scsi-pci" " -device scsi-hd,drive=drive0,id=dev0"); diff --git a/tests/nvme-test.c b/tests/nvme-test.c index XXXXXXX..XXXXXXX 100644 --- a/tests/nvme-test.c +++ b/tests/nvme-test.c @@ -XXX,XX +XXX,XX @@ int main(int argc, char **argv) g_test_init(&argc, &argv, NULL); qtest_add_func("/nvme/nop", nop); - qtest_start("-drive id=drv0,if=none,file=/dev/null,format=raw " + qtest_start("-drive id=drv0,if=none,file=null-co://,format=raw " "-device nvme,drive=drv0,serial=foo"); ret = g_test_run(); diff --git a/tests/usb-hcd-uhci-test.c b/tests/usb-hcd-uhci-test.c index XXXXXXX..XXXXXXX 100644 --- a/tests/usb-hcd-uhci-test.c +++ b/tests/usb-hcd-uhci-test.c @@ -XXX,XX +XXX,XX @@ int main(int argc, char **argv) { const char *arch = qtest_get_arch(); const char *cmd = "-device piix3-usb-uhci,id=uhci,addr=1d.0" - " -drive id=drive0,if=none,file=/dev/null,format=raw" + " -drive id=drive0,if=none,file=null-co://,format=raw" " -device usb-tablet,bus=uhci.0,port=1"; int ret; diff --git a/tests/usb-hcd-xhci-test.c b/tests/usb-hcd-xhci-test.c index XXXXXXX..XXXXXXX 100644 --- a/tests/usb-hcd-xhci-test.c +++ b/tests/usb-hcd-xhci-test.c @@ -XXX,XX +XXX,XX @@ int main(int argc, char **argv) qtest_add_func("/xhci/pci/hotplug/usb-uas", test_usb_uas_hotplug); qtest_start("-device nec-usb-xhci,id=xhci" - " -drive id=drive0,if=none,file=/dev/null,format=raw"); + " -drive id=drive0,if=none,file=null-co://,format=raw"); ret = g_test_run(); qtest_end(); diff --git a/tests/virtio-blk-test.c b/tests/virtio-blk-test.c index XXXXXXX..XXXXXXX 100644 --- a/tests/virtio-blk-test.c +++ b/tests/virtio-blk-test.c @@ -XXX,XX +XXX,XX @@ static QOSState *pci_test_start(void) const char *arch = qtest_get_arch(); char *tmp_path; const char *cmd = "-drive if=none,id=drive0,file=%s,format=raw " - "-drive if=none,id=drive1,file=/dev/null,format=raw " + "-drive if=none,id=drive1,file=null-co://,format=raw " "-device virtio-blk-pci,id=drv0,drive=drive0," "addr=%x.%x"; diff --git a/tests/virtio-scsi-test.c b/tests/virtio-scsi-test.c index XXXXXXX..XXXXXXX 100644 --- a/tests/virtio-scsi-test.c +++ b/tests/virtio-scsi-test.c @@ -XXX,XX +XXX,XX @@ typedef struct { static QOSState *qvirtio_scsi_start(const char *extra_opts) { const char *arch = qtest_get_arch(); - const char *cmd = "-drive id=drv0,if=none,file=/dev/null,format=raw " + const char *cmd = "-drive id=drv0,if=none,file=null-co://,format=raw " "-device virtio-scsi-pci,id=vs0 " "-device scsi-hd,bus=vs0.0,drive=drv0 %s"; @@ -XXX,XX +XXX,XX @@ static void hotplug(void) QDict *response; QOSState *qs; - qs = qvirtio_scsi_start("-drive id=drv1,if=none,file=/dev/null,format=raw"); + qs = qvirtio_scsi_start( + "-drive id=drv1,if=none,file=null-co://,format=raw"); response = qmp("{\"execute\": \"device_add\"," " \"arguments\": {" " \"driver\": \"scsi-hd\"," -- 1.8.3.1 From: Fam Zheng <famz@redhat.com> Making this option available even before implementing it will let converting tests easier: in coming patches they can specify the option already when necessary, before we actually write code to lock the images. Signed-off-by: Fam Zheng <famz@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com> --- block/file-posix.c | 5 +++++ qapi/block-core.json | 4 ++++ 2 files changed, 9 insertions(+) diff --git a/block/file-posix.c b/block/file-posix.c index XXXXXXX..XXXXXXX 100644 --- a/block/file-posix.c +++ b/block/file-posix.c @@ -XXX,XX +XXX,XX @@ static QemuOptsList raw_runtime_opts = { .type = QEMU_OPT_STRING, .help = "host AIO implementation (threads, native)", }, + { + .name = "locking", + .type = QEMU_OPT_STRING, + .help = "file locking mode (on/off/auto, default: auto)", + }, { /* end of list */ } }, }; diff --git a/qapi/block-core.json b/qapi/block-core.json index XXXXXXX..XXXXXXX 100644 --- a/qapi/block-core.json +++ b/qapi/block-core.json @@ -XXX,XX +XXX,XX @@ # # @filename: path to the image file # @aio: AIO backend (default: threads) (since: 2.8) +# @locking: whether to enable file locking. If set to 'auto', only enable +# when Open File Descriptor (OFD) locking API is available +# (default: auto, since 2.10) # # Since: 2.9 ## { 'struct': 'BlockdevOptionsFile', 'data': { 'filename': 'str', + '*locking': 'OnOffAuto', '*aio': 'BlockdevAioOptions' } } ## -- 1.8.3.1 From: Fam Zheng <famz@redhat.com> We share the same set of QAPI options with file-posix, but locking is not supported here. So error out if it is specified as 'on' for now. Signed-off-by: Fam Zheng <famz@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com> --- block/file-win32.c | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/block/file-win32.c b/block/file-win32.c index XXXXXXX..XXXXXXX 100644 --- a/block/file-win32.c +++ b/block/file-win32.c @@ -XXX,XX +XXX,XX @@ static int raw_open(BlockDriverState *bs, QDict *options, int flags, goto fail; } + if (qdict_get_try_bool(options, "locking", false)) { + error_setg(errp, "locking=on is not supported on Windows"); + goto fail; + } + filename = qemu_opt_get(opts, "filename"); use_aio = get_aio_option(opts, flags, &local_err); -- 1.8.3.1 From: Fam Zheng <famz@redhat.com> The COLO block replication architecture requires one disk to be shared between primary and secondary, in the test both processes use posix file protocol (instead of over NBD) so it is affected by image locking. Disable the lock. Signed-off-by: Fam Zheng <famz@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com> --- tests/test-replication.c | 9 +++++++-- 1 file changed, 7 insertions(+), 2 deletions(-) diff --git a/tests/test-replication.c b/tests/test-replication.c index XXXXXXX..XXXXXXX 100644 --- a/tests/test-replication.c +++ b/tests/test-replication.c @@ -XXX,XX +XXX,XX @@ static BlockBackend *start_primary(void) char *cmdline; cmdline = g_strdup_printf("driver=replication,mode=primary,node-name=xxx," - "file.driver=qcow2,file.file.filename=%s" + "file.driver=qcow2,file.file.filename=%s," + "file.file.locking=off" , p_local_disk); opts = qemu_opts_parse_noisily(&qemu_drive_opts, cmdline, false); g_free(cmdline); @@ -XXX,XX +XXX,XX @@ static BlockBackend *start_secondary(void) Error *local_err = NULL; /* add s_local_disk and forge S_LOCAL_DISK_ID */ - cmdline = g_strdup_printf("file.filename=%s,driver=qcow2", s_local_disk); + cmdline = g_strdup_printf("file.filename=%s,driver=qcow2," + "file.locking=off", + s_local_disk); opts = qemu_opts_parse_noisily(&qemu_drive_opts, cmdline, false); g_free(cmdline); @@ -XXX,XX +XXX,XX @@ static BlockBackend *start_secondary(void) /* add S_(ACTIVE/HIDDEN)_DISK and forge S_ID */ cmdline = g_strdup_printf("driver=replication,mode=secondary,top-id=%s," "file.driver=qcow2,file.file.filename=%s," + "file.file.locking=off," "file.backing.driver=qcow2," "file.backing.file.filename=%s," + "file.backing.file.locking=off," "file.backing.backing=%s" , S_ID, s_active_disk, s_hidden_disk , S_LOCAL_DISK_ID); -- 1.8.3.1 From: Fam Zheng <famz@redhat.com> Opening the backing image for the second time is bad, especially here when it is also in use as the active image as the source. The drive-backup job itself doesn't read from target->backing for COW, instead it gets data from the write notifier, so it's not a big problem. However, exporting the target to NBD etc. won't work, because of the likely stale metadata cache. Use BDRV_O_NO_BACKING in this case and manually set up the backing BdrvChild. Cc: qemu-stable@nongnu.org Signed-off-by: Fam Zheng <famz@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com> --- blockdev.c | 15 ++++++++++++++- 1 file changed, 14 insertions(+), 1 deletion(-) diff --git a/blockdev.c b/blockdev.c index XXXXXXX..XXXXXXX 100644 --- a/blockdev.c +++ b/blockdev.c @@ -XXX,XX +XXX,XX @@ static BlockJob *do_drive_backup(DriveBackup *backup, BlockJobTxn *txn, Error *local_err = NULL; int flags; int64_t size; + bool set_backing_hd = false; if (!backup->has_speed) { backup->speed = 0; @@ -XXX,XX +XXX,XX @@ static BlockJob *do_drive_backup(DriveBackup *backup, BlockJobTxn *txn, } if (backup->sync == MIRROR_SYNC_MODE_NONE) { source = bs; + flags |= BDRV_O_NO_BACKING; + set_backing_hd = true; } size = bdrv_getlength(bs); @@ -XXX,XX +XXX,XX @@ static BlockJob *do_drive_backup(DriveBackup *backup, BlockJobTxn *txn, } if (backup->format) { - options = qdict_new(); + if (!options) { + options = qdict_new(); + } qdict_put_str(options, "driver", backup->format); } @@ -XXX,XX +XXX,XX @@ static BlockJob *do_drive_backup(DriveBackup *backup, BlockJobTxn *txn, bdrv_set_aio_context(target_bs, aio_context); + if (set_backing_hd) { + bdrv_set_backing_hd(target_bs, source, &local_err); + if (local_err) { + bdrv_unref(target_bs); + goto out; + } + } + if (backup->has_bitmap) { bmap = bdrv_find_dirty_bitmap(bs, backup->bitmap); if (!bmap) { -- 1.8.3.1 From: Fam Zheng <famz@redhat.com> They are wrappers of POSIX fcntl "file private locking", with a convenient "try lock" wrapper implemented with F_OFD_GETLK. Signed-off-by: Fam Zheng <famz@redhat.com> Reviewed-by: Max Reitz <mreitz@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com> --- include/qemu/osdep.h | 3 +++ util/osdep.c | 48 ++++++++++++++++++++++++++++++++++++++++++++++++ 2 files changed, 51 insertions(+) diff --git a/include/qemu/osdep.h b/include/qemu/osdep.h index XXXXXXX..XXXXXXX 100644 --- a/include/qemu/osdep.h +++ b/include/qemu/osdep.h @@ -XXX,XX +XXX,XX @@ int qemu_close(int fd); #ifndef _WIN32 int qemu_dup(int fd); #endif +int qemu_lock_fd(int fd, int64_t start, int64_t len, bool exclusive); +int qemu_unlock_fd(int fd, int64_t start, int64_t len); +int qemu_lock_fd_test(int fd, int64_t start, int64_t len, bool exclusive); #if defined(__HAIKU__) && defined(__i386__) #define FMT_pid "%ld" diff --git a/util/osdep.c b/util/osdep.c index XXXXXXX..XXXXXXX 100644 --- a/util/osdep.c +++ b/util/osdep.c @@ -XXX,XX +XXX,XX @@ static int qemu_parse_fdset(const char *param) { return qemu_parse_fd(param); } + +static int qemu_lock_fcntl(int fd, int64_t start, int64_t len, int fl_type) +{ +#ifdef F_OFD_SETLK + int ret; + struct flock fl = { + .l_whence = SEEK_SET, + .l_start = start, + .l_len = len, + .l_type = fl_type, + }; + ret = fcntl(fd, F_OFD_SETLK, &fl); + return ret == -1 ? -errno : 0; +#else + return -ENOTSUP; +#endif +} + +int qemu_lock_fd(int fd, int64_t start, int64_t len, bool exclusive) +{ + return qemu_lock_fcntl(fd, start, len, exclusive ? F_WRLCK : F_RDLCK); +} + +int qemu_unlock_fd(int fd, int64_t start, int64_t len) +{ + return qemu_lock_fcntl(fd, start, len, F_UNLCK); +} + +int qemu_lock_fd_test(int fd, int64_t start, int64_t len, bool exclusive) +{ +#ifdef F_OFD_SETLK + int ret; + struct flock fl = { + .l_whence = SEEK_SET, + .l_start = start, + .l_len = len, + .l_type = exclusive ? F_WRLCK : F_RDLCK, + }; + ret = fcntl(fd, F_OFD_GETLK, &fl); + if (ret == -1) { + return -errno; + } else { + return fl.l_type == F_UNLCK ? 0 : -EAGAIN; + } +#else + return -ENOTSUP; +#endif +} #endif /* -- 1.8.3.1 From: Fam Zheng <famz@redhat.com> Signed-off-by: Fam Zheng <famz@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com> --- util/osdep.c | 20 ++++++++++---------- 1 file changed, 10 insertions(+), 10 deletions(-) diff --git a/util/osdep.c b/util/osdep.c index XXXXXXX..XXXXXXX 100644 --- a/util/osdep.c +++ b/util/osdep.c @@ -XXX,XX +XXX,XX @@ extern int madvise(caddr_t, size_t, int); #include "qemu/error-report.h" #include "monitor/monitor.h" +#ifdef F_OFD_SETLK +#define QEMU_SETLK F_OFD_SETLK +#define QEMU_GETLK F_OFD_GETLK +#else +#define QEMU_SETLK F_SETLK +#define QEMU_GETLK F_GETLK +#endif + static bool fips_enabled = false; static const char *hw_version = QEMU_HW_VERSION; @@ -XXX,XX +XXX,XX @@ static int qemu_parse_fdset(const char *param) static int qemu_lock_fcntl(int fd, int64_t start, int64_t len, int fl_type) { -#ifdef F_OFD_SETLK int ret; struct flock fl = { .l_whence = SEEK_SET, @@ -XXX,XX +XXX,XX @@ static int qemu_lock_fcntl(int fd, int64_t start, int64_t len, int fl_type) .l_len = len, .l_type = fl_type, }; - ret = fcntl(fd, F_OFD_SETLK, &fl); + ret = fcntl(fd, QEMU_SETLK, &fl); return ret == -1 ? -errno : 0; -#else - return -ENOTSUP; -#endif } int qemu_lock_fd(int fd, int64_t start, int64_t len, bool exclusive) @@ -XXX,XX +XXX,XX @@ int qemu_unlock_fd(int fd, int64_t start, int64_t len) int qemu_lock_fd_test(int fd, int64_t start, int64_t len, bool exclusive) { -#ifdef F_OFD_SETLK int ret; struct flock fl = { .l_whence = SEEK_SET, @@ -XXX,XX +XXX,XX @@ int qemu_lock_fd_test(int fd, int64_t start, int64_t len, bool exclusive) .l_len = len, .l_type = exclusive ? F_WRLCK : F_RDLCK, }; - ret = fcntl(fd, F_OFD_GETLK, &fl); + ret = fcntl(fd, QEMU_GETLK, &fl); if (ret == -1) { return -errno; } else { return fl.l_type == F_UNLCK ? 0 : -EAGAIN; } -#else - return -ENOTSUP; -#endif } #endif -- 1.8.3.1 From: Fam Zheng <famz@redhat.com> This extends the permission bits of op blocker API to external using Linux OFD locks. Each permission in @perm and @shared_perm is represented by a locked byte in the image file. Requesting a permission in @perm is translated to a shared lock of the corresponding byte; rejecting to share the same permission is translated to a shared lock of a separate byte. With that, we use 2x number of bytes of distinct permission types. virtlockd in libvirt locks the first byte, so we do locking from a higher offset. Suggested-by: Kevin Wolf <kwolf@redhat.com> Signed-off-by: Fam Zheng <famz@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com> --- block/file-posix.c | 276 ++++++++++++++++++++++++++++++++++++++++++++++++++++- 1 file changed, 275 insertions(+), 1 deletion(-) diff --git a/block/file-posix.c b/block/file-posix.c index XXXXXXX..XXXXXXX 100644 --- a/block/file-posix.c +++ b/block/file-posix.c @@ -XXX,XX +XXX,XX @@ do { \ #define MAX_BLOCKSIZE 4096 +/* Posix file locking bytes. Libvirt takes byte 0, we start from higher bytes, + * leaving a few more bytes for its future use. */ +#define RAW_LOCK_PERM_BASE 100 +#define RAW_LOCK_SHARED_BASE 200 + typedef struct BDRVRawState { int fd; + int lock_fd; + bool use_lock; int type; int open_flags; size_t buf_align; + /* The current permissions. */ + uint64_t perm; + uint64_t shared_perm; + #ifdef CONFIG_XFS bool is_xfs:1; #endif @@ -XXX,XX +XXX,XX @@ static int raw_open_common(BlockDriverState *bs, QDict *options, BlockdevAioOptions aio, aio_default; int fd, ret; struct stat st; + OnOffAuto locking; opts = qemu_opts_create(&raw_runtime_opts, NULL, 0, &error_abort); qemu_opts_absorb_qdict(opts, options, &local_err); @@ -XXX,XX +XXX,XX @@ static int raw_open_common(BlockDriverState *bs, QDict *options, } s->use_linux_aio = (aio == BLOCKDEV_AIO_OPTIONS_NATIVE); + locking = qapi_enum_parse(OnOffAuto_lookup, qemu_opt_get(opts, "locking"), + ON_OFF_AUTO__MAX, ON_OFF_AUTO_AUTO, &local_err); + if (local_err) { + error_propagate(errp, local_err); + ret = -EINVAL; + goto fail; + } + switch (locking) { + case ON_OFF_AUTO_ON: + s->use_lock = true; +#ifndef F_OFD_SETLK + fprintf(stderr, + "File lock requested but OFD locking syscall is unavailable, " + "falling back to POSIX file locks.\n" + "Due to the implementation, locks can be lost unexpectedly.\n"); +#endif + break; + case ON_OFF_AUTO_OFF: + s->use_lock = false; + break; + case ON_OFF_AUTO_AUTO: +#ifdef F_OFD_SETLK + s->use_lock = true; +#else + s->use_lock = false; +#endif + break; + default: + abort(); + } + s->open_flags = open_flags; raw_parse_flags(bdrv_flags, &s->open_flags); @@ -XXX,XX +XXX,XX @@ static int raw_open_common(BlockDriverState *bs, QDict *options, } s->fd = fd; + s->lock_fd = -1; + if (s->use_lock) { + fd = qemu_open(filename, s->open_flags); + if (fd < 0) { + ret = -errno; + error_setg_errno(errp, errno, "Could not open '%s' for locking", + filename); + qemu_close(s->fd); + goto fail; + } + s->lock_fd = fd; + } + s->perm = 0; + s->shared_perm = BLK_PERM_ALL; + #ifdef CONFIG_LINUX_AIO /* Currently Linux does AIO only for files opened with O_DIRECT */ if (s->use_linux_aio && !(s->open_flags & O_DIRECT)) { @@ -XXX,XX +XXX,XX @@ static int raw_open(BlockDriverState *bs, QDict *options, int flags, return raw_open_common(bs, options, flags, 0, errp); } +typedef enum { + RAW_PL_PREPARE, + RAW_PL_COMMIT, + RAW_PL_ABORT, +} RawPermLockOp; + +#define PERM_FOREACH(i) \ + for ((i) = 0; (1ULL << (i)) <= BLK_PERM_ALL; i++) + +/* Lock bytes indicated by @perm_lock_bits and @shared_perm_lock_bits in the + * file; if @unlock == true, also unlock the unneeded bytes. + * @shared_perm_lock_bits is the mask of all permissions that are NOT shared. + */ +static int raw_apply_lock_bytes(BDRVRawState *s, + uint64_t perm_lock_bits, + uint64_t shared_perm_lock_bits, + bool unlock, Error **errp) +{ + int ret; + int i; + + PERM_FOREACH(i) { + int off = RAW_LOCK_PERM_BASE + i; + if (perm_lock_bits & (1ULL << i)) { + ret = qemu_lock_fd(s->lock_fd, off, 1, false); + if (ret) { + error_setg(errp, "Failed to lock byte %d", off); + return ret; + } + } else if (unlock) { + ret = qemu_unlock_fd(s->lock_fd, off, 1); + if (ret) { + error_setg(errp, "Failed to unlock byte %d", off); + return ret; + } + } + } + PERM_FOREACH(i) { + int off = RAW_LOCK_SHARED_BASE + i; + if (shared_perm_lock_bits & (1ULL << i)) { + ret = qemu_lock_fd(s->lock_fd, off, 1, false); + if (ret) { + error_setg(errp, "Failed to lock byte %d", off); + return ret; + } + } else if (unlock) { + ret = qemu_unlock_fd(s->lock_fd, off, 1); + if (ret) { + error_setg(errp, "Failed to unlock byte %d", off); + return ret; + } + } + } + return 0; +} + +/* Check "unshared" bytes implied by @perm and ~@shared_perm in the file. */ +static int raw_check_lock_bytes(BDRVRawState *s, + uint64_t perm, uint64_t shared_perm, + Error **errp) +{ + int ret; + int i; + + PERM_FOREACH(i) { + int off = RAW_LOCK_SHARED_BASE + i; + uint64_t p = 1ULL << i; + if (perm & p) { + ret = qemu_lock_fd_test(s->lock_fd, off, 1, true); + if (ret) { + char *perm_name = bdrv_perm_names(p); + error_setg(errp, + "Failed to get \"%s\" lock", + perm_name); + g_free(perm_name); + error_append_hint(errp, + "Is another process using the image?\n"); + return ret; + } + } + } + PERM_FOREACH(i) { + int off = RAW_LOCK_PERM_BASE + i; + uint64_t p = 1ULL << i; + if (!(shared_perm & p)) { + ret = qemu_lock_fd_test(s->lock_fd, off, 1, true); + if (ret) { + char *perm_name = bdrv_perm_names(p); + error_setg(errp, + "Failed to get shared \"%s\" lock", + perm_name); + g_free(perm_name); + error_append_hint(errp, + "Is another process using the image?\n"); + return ret; + } + } + } + return 0; +} + +static int raw_handle_perm_lock(BlockDriverState *bs, + RawPermLockOp op, + uint64_t new_perm, uint64_t new_shared, + Error **errp) +{ + BDRVRawState *s = bs->opaque; + int ret = 0; + Error *local_err = NULL; + + if (!s->use_lock) { + return 0; + } + + if (bdrv_get_flags(bs) & BDRV_O_INACTIVE) { + return 0; + } + + assert(s->lock_fd > 0); + + switch (op) { + case RAW_PL_PREPARE: + ret = raw_apply_lock_bytes(s, s->perm | new_perm, + ~s->shared_perm | ~new_shared, + false, errp); + if (!ret) { + ret = raw_check_lock_bytes(s, new_perm, new_shared, errp); + if (!ret) { + return 0; + } + } + op = RAW_PL_ABORT; + /* fall through to unlock bytes. */ + case RAW_PL_ABORT: + raw_apply_lock_bytes(s, s->perm, ~s->shared_perm, true, &local_err); + if (local_err) { + /* Theoretically the above call only unlocks bytes and it cannot + * fail. Something weird happened, report it. + */ + error_report_err(local_err); + } + break; + case RAW_PL_COMMIT: + raw_apply_lock_bytes(s, new_perm, ~new_shared, true, &local_err); + if (local_err) { + /* Theoretically the above call only unlocks bytes and it cannot + * fail. Something weird happened, report it. + */ + error_report_err(local_err); + } + break; + } + return ret; +} + static int raw_reopen_prepare(BDRVReopenState *state, BlockReopenQueue *queue, Error **errp) { @@ -XXX,XX +XXX,XX @@ static void raw_close(BlockDriverState *bs) qemu_close(s->fd); s->fd = -1; } + if (s->lock_fd >= 0) { + qemu_close(s->lock_fd); + s->lock_fd = -1; + } } static int raw_truncate(BlockDriverState *bs, int64_t offset, Error **errp) @@ -XXX,XX +XXX,XX @@ static QemuOptsList raw_create_opts = { } }; +static int raw_check_perm(BlockDriverState *bs, uint64_t perm, uint64_t shared, + Error **errp) +{ + return raw_handle_perm_lock(bs, RAW_PL_PREPARE, perm, shared, errp); +} + +static void raw_set_perm(BlockDriverState *bs, uint64_t perm, uint64_t shared) +{ + BDRVRawState *s = bs->opaque; + raw_handle_perm_lock(bs, RAW_PL_COMMIT, perm, shared, NULL); + s->perm = perm; + s->shared_perm = shared; +} + +static void raw_abort_perm_update(BlockDriverState *bs) +{ + raw_handle_perm_lock(bs, RAW_PL_ABORT, 0, 0, NULL); +} + +static int raw_inactivate(BlockDriverState *bs) +{ + int ret; + uint64_t perm = 0; + uint64_t shared = BLK_PERM_ALL; + + ret = raw_handle_perm_lock(bs, RAW_PL_PREPARE, perm, shared, NULL); + if (ret) { + return ret; + } + raw_handle_perm_lock(bs, RAW_PL_COMMIT, perm, shared, NULL); + return 0; +} + + +static void raw_invalidate_cache(BlockDriverState *bs, Error **errp) +{ + BDRVRawState *s = bs->opaque; + int ret; + + assert(!(bdrv_get_flags(bs) & BDRV_O_INACTIVE)); + ret = raw_handle_perm_lock(bs, RAW_PL_PREPARE, s->perm, s->shared_perm, + errp); + if (ret) { + return; + } + raw_handle_perm_lock(bs, RAW_PL_COMMIT, s->perm, s->shared_perm, NULL); +} + BlockDriver bdrv_file = { .format_name = "file", .protocol_name = "file", @@ -XXX,XX +XXX,XX @@ BlockDriver bdrv_file = { .bdrv_get_info = raw_get_info, .bdrv_get_allocated_file_size = raw_get_allocated_file_size, - + .bdrv_inactivate = raw_inactivate, + .bdrv_invalidate_cache = raw_invalidate_cache, + .bdrv_check_perm = raw_check_perm, + .bdrv_set_perm = raw_set_perm, + .bdrv_abort_perm_update = raw_abort_perm_update, .create_opts = &raw_create_opts, }; @@ -XXX,XX +XXX,XX @@ static BlockDriver bdrv_host_device = { .bdrv_get_info = raw_get_info, .bdrv_get_allocated_file_size = raw_get_allocated_file_size, + .bdrv_inactivate = raw_inactivate, + .bdrv_invalidate_cache = raw_invalidate_cache, + .bdrv_check_perm = raw_check_perm, + .bdrv_set_perm = raw_set_perm, + .bdrv_abort_perm_update = raw_abort_perm_update, .bdrv_probe_blocksizes = hdev_probe_blocksizes, .bdrv_probe_geometry = hdev_probe_geometry, -- 1.8.3.1 From: Fam Zheng <famz@redhat.com> Signed-off-by: Fam Zheng <famz@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com> --- tests/qemu-iotests/153 | 233 +++++++++++++++++++++++++++ tests/qemu-iotests/153.out | 390 +++++++++++++++++++++++++++++++++++++++++++++ tests/qemu-iotests/group | 1 + 3 files changed, 624 insertions(+) create mode 100755 tests/qemu-iotests/153 create mode 100644 tests/qemu-iotests/153.out diff --git a/tests/qemu-iotests/153 b/tests/qemu-iotests/153 new file mode 100755 index XXXXXXX..XXXXXXX --- /dev/null +++ b/tests/qemu-iotests/153 @@ -XXX,XX +XXX,XX @@ +#!/bin/bash +# +# Test image locking +# +# Copyright 2016, 2017 Red Hat, Inc. +# +# This program is free software; you can redistribute it and/or modify +# it under the terms of the GNU General Public License as published by +# the Free Software Foundation; either version 2 of the License, or +# (at your option) any later version. +# +# This program is distributed in the hope that it will be useful, +# but WITHOUT ANY WARRANTY; without even the implied warranty of +# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +# GNU General Public License for more details. +# +# You should have received a copy of the GNU General Public License +# along with this program. If not, see <http://www.gnu.org/licenses/>. +# + +# creator +owner=famz@redhat.com + +seq="$(basename $0)" +echo "QA output created by $seq" + +here="$PWD" +tmp=/tmp/$$ +status=1 # failure is the default! + +_cleanup() +{ + _cleanup_test_img + rm -f "${TEST_IMG}.base" + rm -f "${TEST_IMG}.convert" + rm -f "${TEST_IMG}.a" + rm -f "${TEST_IMG}.b" + rm -f "${TEST_IMG}.lnk" +} +trap "_cleanup; exit \$status" 0 1 2 3 15 + +# get standard environment, filters and checks +. ./common.rc +. ./common.filter +. ./common.qemu + +size=32M + +_check_ofd() +{ + _make_test_img $size >/dev/null + if $QEMU_IMG_PROG info --image-opts "driver=file,locking=on,filename=$TEST_IMG" 2>&1 | + grep -q 'falling back to POSIX file'; then + return 1 + else + return 0 + fi +} + +_check_ofd || _notrun "OFD lock not available" + +_supported_fmt qcow2 +_supported_proto file +_supported_os Linux + +_run_cmd() +{ + echo + (echo "$@"; "$@" 2>&1 1>/dev/null) | _filter_testdir +} + +function _do_run_qemu() +{ + ( + if ! test -t 0; then + while read cmd; do + echo $cmd + done + fi + echo quit + ) | $QEMU -nographic -monitor stdio -serial none "$@" 1>/dev/null +} + +function _run_qemu_with_images() +{ + _do_run_qemu \ + $(for i in $@; do echo "-drive if=none,file=$i"; done) 2>&1 \ + | _filter_testdir | _filter_qemu +} + +echo "== readonly=off,force-share=on should be rejected ==" +_run_qemu_with_images null-co://,readonly=off,force-share=on + +for opts1 in "" "read-only=on" "read-only=on,force-share=on"; do + echo + echo "== Creating base image ==" + TEST_IMG="${TEST_IMG}.base" _make_test_img $size + + echo + echo "== Creating test image ==" + $QEMU_IMG create -f $IMGFMT "${TEST_IMG}" -b ${TEST_IMG}.base | _filter_img_create + + echo + echo "== Launching QEMU, opts: '$opts1' ==" + _launch_qemu -drive file="${TEST_IMG}",if=none,$opts1 + h=$QEMU_HANDLE + + for opts2 in "" "read-only=on" "read-only=on,force-share=on"; do + echo + echo "== Launching another QEMU, opts: '$opts2' ==" + echo "quit" | \ + $QEMU -nographic -monitor stdio \ + -drive file="${TEST_IMG}",if=none,$opts2 2>&1 1>/dev/null | \ + _filter_testdir | _filter_qemu + done + + for L in "" "-U"; do + + echo + echo "== Running utility commands $L ==" + _run_cmd $QEMU_IO $L -c "read 0 512" "${TEST_IMG}" + _run_cmd $QEMU_IO $L -r -c "read 0 512" "${TEST_IMG}" + _run_cmd $QEMU_IO -c "open $L ${TEST_IMG}" -c "read 0 512" + _run_cmd $QEMU_IO -c "open -r $L ${TEST_IMG}" -c "read 0 512" + _run_cmd $QEMU_IMG info $L "${TEST_IMG}" + _run_cmd $QEMU_IMG check $L "${TEST_IMG}" + _run_cmd $QEMU_IMG compare $L "${TEST_IMG}" "${TEST_IMG}" + _run_cmd $QEMU_IMG map $L "${TEST_IMG}" + _run_cmd $QEMU_IMG amend -o "" $L "${TEST_IMG}" + _run_cmd $QEMU_IMG commit $L "${TEST_IMG}" + _run_cmd $QEMU_IMG resize $L "${TEST_IMG}" $size + _run_cmd $QEMU_IMG rebase $L "${TEST_IMG}" -b "${TEST_IMG}.base" + _run_cmd $QEMU_IMG snapshot -l $L "${TEST_IMG}" + _run_cmd $QEMU_IMG convert $L "${TEST_IMG}" "${TEST_IMG}.convert" + _run_cmd $QEMU_IMG dd $L if="${TEST_IMG}" of="${TEST_IMG}.convert" bs=512 count=1 + _run_cmd $QEMU_IMG bench $L -c 1 "${TEST_IMG}" + _run_cmd $QEMU_IMG bench $L -w -c 1 "${TEST_IMG}" + done + _send_qemu_cmd $h "{ 'execute': 'quit', }" "" + echo + echo "Round done" + _cleanup_qemu +done + +for opt1 in $test_opts; do + for opt2 in $test_opts; do + echo + echo "== Two devices with the same image ($opt1 - $opt2) ==" + _run_qemu_with_images "${TEST_IMG},$opt1" "${TEST_IMG},$opt2" + done +done + +echo "== Creating ${TEST_IMG}.[abc] ==" | _filter_testdir +( + $QEMU_IMG create -f qcow2 "${TEST_IMG}.a" -b "${TEST_IMG}" + $QEMU_IMG create -f qcow2 "${TEST_IMG}.b" -b "${TEST_IMG}" + $QEMU_IMG create -f qcow2 "${TEST_IMG}.c" -b "${TEST_IMG}.b" +) | _filter_img_create + +echo +echo "== Two devices sharing the same file in backing chain ==" +_run_qemu_with_images "${TEST_IMG}.a" "${TEST_IMG}.b" +_run_qemu_with_images "${TEST_IMG}.a" "${TEST_IMG}.c" + +echo +echo "== Backing image also as an active device ==" +_run_qemu_with_images "${TEST_IMG}.a" "${TEST_IMG}" + +echo +echo "== Backing image also as an active device (ro) ==" +_run_qemu_with_images "${TEST_IMG}.a" "${TEST_IMG},readonly=on" + +echo +echo "== Symbolic link ==" +rm -f "${TEST_IMG}.lnk" &>/dev/null +ln -s ${TEST_IMG} "${TEST_IMG}.lnk" || echo "Failed to create link" +_run_qemu_with_images "${TEST_IMG}.lnk" "${TEST_IMG}" + +echo +echo "== Closing an image should unlock it ==" +_launch_qemu + +_send_qemu_cmd $QEMU_HANDLE \ + "{ 'execute': 'qmp_capabilities' }" \ + 'return' + +echo "Adding drive" +_send_qemu_cmd $QEMU_HANDLE \ + "{ 'execute': 'human-monitor-command', + 'arguments': { 'command-line': 'drive_add 0 if=none,id=d0,file=${TEST_IMG}' } }" \ + "" + +_run_cmd $QEMU_IO "${TEST_IMG}" -c 'write 0 512' + +echo "Closing drive" +_send_qemu_cmd $QEMU_HANDLE \ + "{ 'execute': 'human-monitor-command', + 'arguments': { 'command-line': 'drive_del d0' } }" \ + "" + +_run_cmd $QEMU_IO "${TEST_IMG}" -c 'write 0 512' + +echo "Adding two and closing one" +for d in d0 d1; do + _send_qemu_cmd $QEMU_HANDLE \ + "{ 'execute': 'human-monitor-command', + 'arguments': { 'command-line': 'drive_add 0 if=none,id=$d,file=${TEST_IMG},readonly=on' } }" \ + "" +done + +_run_cmd $QEMU_IMG info "${TEST_IMG}" + +_send_qemu_cmd $QEMU_HANDLE \ + "{ 'execute': 'human-monitor-command', + 'arguments': { 'command-line': 'drive_del d0' } }" \ + "" + +_run_cmd $QEMU_IO "${TEST_IMG}" -c 'write 0 512' + +echo "Closing the other" +_send_qemu_cmd $QEMU_HANDLE \ + "{ 'execute': 'human-monitor-command', + 'arguments': { 'command-line': 'drive_del d1' } }" \ + "" + +_run_cmd $QEMU_IO "${TEST_IMG}" -c 'write 0 512' + +_cleanup_qemu + +# success, all done +echo "*** done" +rm -f $seq.full +status=0 diff --git a/tests/qemu-iotests/153.out b/tests/qemu-iotests/153.out new file mode 100644 index XXXXXXX..XXXXXXX --- /dev/null +++ b/tests/qemu-iotests/153.out @@ -XXX,XX +XXX,XX @@ +QA output created by 153 +== readonly=off,force-share=on should be rejected == +QEMU_PROG: -drive if=none,file=null-co://,readonly=off,force-share=on: force-share=on can only be used with read-only images + +== Creating base image == +Formatting 'TEST_DIR/t.IMGFMT.base', fmt=IMGFMT size=33554432 + +== Creating test image == +Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=33554432 backing_file=TEST_DIR/t.IMGFMT.base + +== Launching QEMU, opts: '' == + +== Launching another QEMU, opts: '' == +QEMU_PROG: -drive file=TEST_DIR/t.qcow2,if=none,: Failed to get "write" lock +Is another process using the image? + +== Launching another QEMU, opts: 'read-only=on' == +QEMU_PROG: -drive file=TEST_DIR/t.qcow2,if=none,read-only=on: Failed to get shared "write" lock +Is another process using the image? + +== Launching another QEMU, opts: 'read-only=on,force-share=on' == + +== Running utility commands == + +_qemu_io_wrapper -c read 0 512 TEST_DIR/t.qcow2 +can't open device TEST_DIR/t.qcow2: Failed to get "write" lock +Is another process using the image? + +_qemu_io_wrapper -r -c read 0 512 TEST_DIR/t.qcow2 +can't open device TEST_DIR/t.qcow2: Failed to get shared "write" lock +Is another process using the image? + +_qemu_io_wrapper -c open TEST_DIR/t.qcow2 -c read 0 512 +can't open device TEST_DIR/t.qcow2: Failed to get "write" lock +Is another process using the image? + +_qemu_io_wrapper -c open -r TEST_DIR/t.qcow2 -c read 0 512 +can't open device TEST_DIR/t.qcow2: Failed to get shared "write" lock +Is another process using the image? + +_qemu_img_wrapper info TEST_DIR/t.qcow2 +qemu-img: Could not open 'TEST_DIR/t.qcow2': Failed to get shared "write" lock +Is another process using the image? + +_qemu_img_wrapper check TEST_DIR/t.qcow2 +qemu-img: Could not open 'TEST_DIR/t.qcow2': Failed to get shared "write" lock +Is another process using the image? + +_qemu_img_wrapper compare TEST_DIR/t.qcow2 TEST_DIR/t.qcow2 +qemu-img: Could not open 'TEST_DIR/t.qcow2': Failed to get shared "write" lock +Is another process using the image? + +_qemu_img_wrapper map TEST_DIR/t.qcow2 +qemu-img: Could not open 'TEST_DIR/t.qcow2': Failed to get shared "write" lock +Is another process using the image? + +_qemu_img_wrapper amend -o TEST_DIR/t.qcow2 +qemu-img: Could not open 'TEST_DIR/t.qcow2': Failed to get "write" lock +Is another process using the image? + +_qemu_img_wrapper commit TEST_DIR/t.qcow2 +qemu-img: Could not open 'TEST_DIR/t.qcow2': Failed to get "write" lock +Is another process using the image? + +_qemu_img_wrapper resize TEST_DIR/t.qcow2 32M +qemu-img: Could not open 'TEST_DIR/t.qcow2': Failed to get "write" lock +Is another process using the image? + +_qemu_img_wrapper rebase TEST_DIR/t.qcow2 -b TEST_DIR/t.qcow2.base +qemu-img: Could not open 'TEST_DIR/t.qcow2': Failed to get "write" lock +Is another process using the image? + +_qemu_img_wrapper snapshot -l TEST_DIR/t.qcow2 +qemu-img: Could not open 'TEST_DIR/t.qcow2': Failed to get shared "write" lock +Is another process using the image? + +_qemu_img_wrapper convert TEST_DIR/t.qcow2 TEST_DIR/t.qcow2.convert +qemu-img: Could not open 'TEST_DIR/t.qcow2': Failed to get shared "write" lock +Is another process using the image? + +_qemu_img_wrapper dd if=TEST_DIR/t.qcow2 of=TEST_DIR/t.qcow2.convert bs=512 count=1 +qemu-img: Could not open 'TEST_DIR/t.qcow2': Failed to get shared "write" lock +Is another process using the image? + +_qemu_img_wrapper bench -c 1 TEST_DIR/t.qcow2 +qemu-img: Could not open 'TEST_DIR/t.qcow2': Failed to get shared "write" lock +Is another process using the image? + +_qemu_img_wrapper bench -w -c 1 TEST_DIR/t.qcow2 +qemu-img: Could not open 'TEST_DIR/t.qcow2': Failed to get "write" lock +Is another process using the image? + +== Running utility commands -U == + +_qemu_io_wrapper -U -c read 0 512 TEST_DIR/t.qcow2 +can't open device TEST_DIR/t.qcow2: force-share=on can only be used with read-only images + +_qemu_io_wrapper -U -r -c read 0 512 TEST_DIR/t.qcow2 + +_qemu_io_wrapper -c open -U TEST_DIR/t.qcow2 -c read 0 512 +can't open device TEST_DIR/t.qcow2: force-share=on can only be used with read-only images + +_qemu_io_wrapper -c open -r -U TEST_DIR/t.qcow2 -c read 0 512 + +_qemu_img_wrapper info -U TEST_DIR/t.qcow2 + +_qemu_img_wrapper check -U TEST_DIR/t.qcow2 + +_qemu_img_wrapper compare -U TEST_DIR/t.qcow2 TEST_DIR/t.qcow2 + +_qemu_img_wrapper map -U TEST_DIR/t.qcow2 + +_qemu_img_wrapper amend -o -U TEST_DIR/t.qcow2 +qemu-img: unrecognized option '-U' +Try 'qemu-img --help' for more information + +_qemu_img_wrapper commit -U TEST_DIR/t.qcow2 +qemu-img: unrecognized option '-U' +Try 'qemu-img --help' for more information + +_qemu_img_wrapper resize -U TEST_DIR/t.qcow2 32M +qemu-img: unrecognized option '-U' +Try 'qemu-img --help' for more information + +_qemu_img_wrapper rebase -U TEST_DIR/t.qcow2 -b TEST_DIR/t.qcow2.base +qemu-img: Could not open 'TEST_DIR/t.qcow2': Failed to get "write" lock +Is another process using the image? + +_qemu_img_wrapper snapshot -l -U TEST_DIR/t.qcow2 + +_qemu_img_wrapper convert -U TEST_DIR/t.qcow2 TEST_DIR/t.qcow2.convert + +_qemu_img_wrapper dd -U if=TEST_DIR/t.qcow2 of=TEST_DIR/t.qcow2.convert bs=512 count=1 + +_qemu_img_wrapper bench -U -c 1 TEST_DIR/t.qcow2 + +_qemu_img_wrapper bench -U -w -c 1 TEST_DIR/t.qcow2 +qemu-img: Could not open 'TEST_DIR/t.qcow2': force-share=on can only be used with read-only images + +Round done + +== Creating base image == +Formatting 'TEST_DIR/t.IMGFMT.base', fmt=IMGFMT size=33554432 + +== Creating test image == +Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=33554432 backing_file=TEST_DIR/t.IMGFMT.base + +== Launching QEMU, opts: 'read-only=on' == + +== Launching another QEMU, opts: '' == +QEMU_PROG: -drive file=TEST_DIR/t.qcow2,if=none,: Failed to get "write" lock +Is another process using the image? + +== Launching another QEMU, opts: 'read-only=on' == + +== Launching another QEMU, opts: 'read-only=on,force-share=on' == + +== Running utility commands == + +_qemu_io_wrapper -c read 0 512 TEST_DIR/t.qcow2 +can't open device TEST_DIR/t.qcow2: Failed to get "write" lock +Is another process using the image? + +_qemu_io_wrapper -r -c read 0 512 TEST_DIR/t.qcow2 + +_qemu_io_wrapper -c open TEST_DIR/t.qcow2 -c read 0 512 +can't open device TEST_DIR/t.qcow2: Failed to get "write" lock +Is another process using the image? + +_qemu_io_wrapper -c open -r TEST_DIR/t.qcow2 -c read 0 512 + +_qemu_img_wrapper info TEST_DIR/t.qcow2 + +_qemu_img_wrapper check TEST_DIR/t.qcow2 + +_qemu_img_wrapper compare TEST_DIR/t.qcow2 TEST_DIR/t.qcow2 + +_qemu_img_wrapper map TEST_DIR/t.qcow2 + +_qemu_img_wrapper amend -o TEST_DIR/t.qcow2 +qemu-img: Could not open 'TEST_DIR/t.qcow2': Failed to get "write" lock +Is another process using the image? + +_qemu_img_wrapper commit TEST_DIR/t.qcow2 +qemu-img: Could not open 'TEST_DIR/t.qcow2': Failed to get "write" lock +Is another process using the image? + +_qemu_img_wrapper resize TEST_DIR/t.qcow2 32M +qemu-img: Could not open 'TEST_DIR/t.qcow2': Failed to get "write" lock +Is another process using the image? + +_qemu_img_wrapper rebase TEST_DIR/t.qcow2 -b TEST_DIR/t.qcow2.base +qemu-img: Could not open 'TEST_DIR/t.qcow2': Failed to get "write" lock +Is another process using the image? + +_qemu_img_wrapper snapshot -l TEST_DIR/t.qcow2 + +_qemu_img_wrapper convert TEST_DIR/t.qcow2 TEST_DIR/t.qcow2.convert + +_qemu_img_wrapper dd if=TEST_DIR/t.qcow2 of=TEST_DIR/t.qcow2.convert bs=512 count=1 + +_qemu_img_wrapper bench -c 1 TEST_DIR/t.qcow2 + +_qemu_img_wrapper bench -w -c 1 TEST_DIR/t.qcow2 +qemu-img: Could not open 'TEST_DIR/t.qcow2': Failed to get "write" lock +Is another process using the image? + +== Running utility commands -U == + +_qemu_io_wrapper -U -c read 0 512 TEST_DIR/t.qcow2 +can't open device TEST_DIR/t.qcow2: force-share=on can only be used with read-only images + +_qemu_io_wrapper -U -r -c read 0 512 TEST_DIR/t.qcow2 + +_qemu_io_wrapper -c open -U TEST_DIR/t.qcow2 -c read 0 512 +can't open device TEST_DIR/t.qcow2: force-share=on can only be used with read-only images + +_qemu_io_wrapper -c open -r -U TEST_DIR/t.qcow2 -c read 0 512 + +_qemu_img_wrapper info -U TEST_DIR/t.qcow2 + +_qemu_img_wrapper check -U TEST_DIR/t.qcow2 + +_qemu_img_wrapper compare -U TEST_DIR/t.qcow2 TEST_DIR/t.qcow2 + +_qemu_img_wrapper map -U TEST_DIR/t.qcow2 + +_qemu_img_wrapper amend -o -U TEST_DIR/t.qcow2 +qemu-img: unrecognized option '-U' +Try 'qemu-img --help' for more information + +_qemu_img_wrapper commit -U TEST_DIR/t.qcow2 +qemu-img: unrecognized option '-U' +Try 'qemu-img --help' for more information + +_qemu_img_wrapper resize -U TEST_DIR/t.qcow2 32M +qemu-img: unrecognized option '-U' +Try 'qemu-img --help' for more information + +_qemu_img_wrapper rebase -U TEST_DIR/t.qcow2 -b TEST_DIR/t.qcow2.base +qemu-img: Could not open 'TEST_DIR/t.qcow2': Failed to get "write" lock +Is another process using the image? + +_qemu_img_wrapper snapshot -l -U TEST_DIR/t.qcow2 + +_qemu_img_wrapper convert -U TEST_DIR/t.qcow2 TEST_DIR/t.qcow2.convert + +_qemu_img_wrapper dd -U if=TEST_DIR/t.qcow2 of=TEST_DIR/t.qcow2.convert bs=512 count=1 + +_qemu_img_wrapper bench -U -c 1 TEST_DIR/t.qcow2 + +_qemu_img_wrapper bench -U -w -c 1 TEST_DIR/t.qcow2 +qemu-img: Could not open 'TEST_DIR/t.qcow2': force-share=on can only be used with read-only images + +Round done + +== Creating base image == +Formatting 'TEST_DIR/t.IMGFMT.base', fmt=IMGFMT size=33554432 + +== Creating test image == +Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=33554432 backing_file=TEST_DIR/t.IMGFMT.base + +== Launching QEMU, opts: 'read-only=on,force-share=on' == + +== Launching another QEMU, opts: '' == + +== Launching another QEMU, opts: 'read-only=on' == + +== Launching another QEMU, opts: 'read-only=on,force-share=on' == + +== Running utility commands == + +_qemu_io_wrapper -c read 0 512 TEST_DIR/t.qcow2 + +_qemu_io_wrapper -r -c read 0 512 TEST_DIR/t.qcow2 + +_qemu_io_wrapper -c open TEST_DIR/t.qcow2 -c read 0 512 + +_qemu_io_wrapper -c open -r TEST_DIR/t.qcow2 -c read 0 512 + +_qemu_img_wrapper info TEST_DIR/t.qcow2 + +_qemu_img_wrapper check TEST_DIR/t.qcow2 + +_qemu_img_wrapper compare TEST_DIR/t.qcow2 TEST_DIR/t.qcow2 + +_qemu_img_wrapper map TEST_DIR/t.qcow2 + +_qemu_img_wrapper amend -o TEST_DIR/t.qcow2 + +_qemu_img_wrapper commit TEST_DIR/t.qcow2 + +_qemu_img_wrapper resize TEST_DIR/t.qcow2 32M + +_qemu_img_wrapper rebase TEST_DIR/t.qcow2 -b TEST_DIR/t.qcow2.base + +_qemu_img_wrapper snapshot -l TEST_DIR/t.qcow2 + +_qemu_img_wrapper convert TEST_DIR/t.qcow2 TEST_DIR/t.qcow2.convert + +_qemu_img_wrapper dd if=TEST_DIR/t.qcow2 of=TEST_DIR/t.qcow2.convert bs=512 count=1 + +_qemu_img_wrapper bench -c 1 TEST_DIR/t.qcow2 + +_qemu_img_wrapper bench -w -c 1 TEST_DIR/t.qcow2 + +== Running utility commands -U == + +_qemu_io_wrapper -U -c read 0 512 TEST_DIR/t.qcow2 +can't open device TEST_DIR/t.qcow2: force-share=on can only be used with read-only images + +_qemu_io_wrapper -U -r -c read 0 512 TEST_DIR/t.qcow2 + +_qemu_io_wrapper -c open -U TEST_DIR/t.qcow2 -c read 0 512 +can't open device TEST_DIR/t.qcow2: force-share=on can only be used with read-only images + +_qemu_io_wrapper -c open -r -U TEST_DIR/t.qcow2 -c read 0 512 + +_qemu_img_wrapper info -U TEST_DIR/t.qcow2 + +_qemu_img_wrapper check -U TEST_DIR/t.qcow2 + +_qemu_img_wrapper compare -U TEST_DIR/t.qcow2 TEST_DIR/t.qcow2 + +_qemu_img_wrapper map -U TEST_DIR/t.qcow2 + +_qemu_img_wrapper amend -o -U TEST_DIR/t.qcow2 +qemu-img: unrecognized option '-U' +Try 'qemu-img --help' for more information + +_qemu_img_wrapper commit -U TEST_DIR/t.qcow2 +qemu-img: unrecognized option '-U' +Try 'qemu-img --help' for more information + +_qemu_img_wrapper resize -U TEST_DIR/t.qcow2 32M +qemu-img: unrecognized option '-U' +Try 'qemu-img --help' for more information + +_qemu_img_wrapper rebase -U TEST_DIR/t.qcow2 -b TEST_DIR/t.qcow2.base + +_qemu_img_wrapper snapshot -l -U TEST_DIR/t.qcow2 + +_qemu_img_wrapper convert -U TEST_DIR/t.qcow2 TEST_DIR/t.qcow2.convert + +_qemu_img_wrapper dd -U if=TEST_DIR/t.qcow2 of=TEST_DIR/t.qcow2.convert bs=512 count=1 + +_qemu_img_wrapper bench -U -c 1 TEST_DIR/t.qcow2 + +_qemu_img_wrapper bench -U -w -c 1 TEST_DIR/t.qcow2 +qemu-img: Could not open 'TEST_DIR/t.qcow2': force-share=on can only be used with read-only images + +Round done +== Creating TEST_DIR/t.qcow2.[abc] == +Formatting 'TEST_DIR/t.IMGFMT.a', fmt=IMGFMT size=33554432 backing_file=TEST_DIR/t.IMGFMT +Formatting 'TEST_DIR/t.IMGFMT.b', fmt=IMGFMT size=33554432 backing_file=TEST_DIR/t.IMGFMT +Formatting 'TEST_DIR/t.IMGFMT.c', fmt=IMGFMT size=33554432 backing_file=TEST_DIR/t.IMGFMT.b + +== Two devices sharing the same file in backing chain == + +== Backing image also as an active device == +QEMU_PROG: -drive if=none,file=TEST_DIR/t.qcow2: Failed to get "write" lock +Is another process using the image? + +== Backing image also as an active device (ro) == + +== Symbolic link == +QEMU_PROG: -drive if=none,file=TEST_DIR/t.qcow2: Failed to get "write" lock +Is another process using the image? + +== Closing an image should unlock it == +{"return": {}} +Adding drive + +_qemu_io_wrapper TEST_DIR/t.qcow2 -c write 0 512 +can't open device TEST_DIR/t.qcow2: Failed to get "write" lock +Is another process using the image? +Closing drive + +_qemu_io_wrapper TEST_DIR/t.qcow2 -c write 0 512 +Adding two and closing one + +_qemu_img_wrapper info TEST_DIR/t.qcow2 + +_qemu_io_wrapper TEST_DIR/t.qcow2 -c write 0 512 +can't open device TEST_DIR/t.qcow2: Failed to get "write" lock +Is another process using the image? +Closing the other + +_qemu_io_wrapper TEST_DIR/t.qcow2 -c write 0 512 +*** done diff --git a/tests/qemu-iotests/group b/tests/qemu-iotests/group index XXXXXXX..XXXXXXX 100644 --- a/tests/qemu-iotests/group +++ b/tests/qemu-iotests/group @@ -XXX,XX +XXX,XX @@ 149 rw auto sudo 150 rw auto quick 152 rw auto quick +153 rw auto quick 154 rw auto backing quick 155 rw auto 156 rw auto quick -- 1.8.3.1 From: Fam Zheng <famz@redhat.com> Signed-off-by: Fam Zheng <famz@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com> --- tests/qemu-iotests/182 | 68 ++++++++++++++++++++++++++++++++++++++++++++++ tests/qemu-iotests/182.out | 8 ++++++ tests/qemu-iotests/group | 1 + 3 files changed, 77 insertions(+) create mode 100755 tests/qemu-iotests/182 create mode 100644 tests/qemu-iotests/182.out diff --git a/tests/qemu-iotests/182 b/tests/qemu-iotests/182 new file mode 100755 index XXXXXXX..XXXXXXX --- /dev/null +++ b/tests/qemu-iotests/182 @@ -XXX,XX +XXX,XX @@ +#!/bin/bash +# +# Test image locking for POSIX locks +# +# Copyright 2017 Red Hat, Inc. +# +# This program is free software; you can redistribute it and/or modify +# it under the terms of the GNU General Public License as published by +# the Free Software Foundation; either version 2 of the License, or +# (at your option) any later version. +# +# This program is distributed in the hope that it will be useful, +# but WITHOUT ANY WARRANTY; without even the implied warranty of +# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +# GNU General Public License for more details. +# +# You should have received a copy of the GNU General Public License +# along with this program. If not, see <http://www.gnu.org/licenses/>. +# + +# creator +owner=famz@redhat.com + +seq="$(basename $0)" +echo "QA output created by $seq" + +here="$PWD" +tmp=/tmp/$$ +status=1 # failure is the default! + +_cleanup() +{ + _cleanup_test_img +} +trap "_cleanup; exit \$status" 0 1 2 3 15 + +# get standard environment, filters and checks +. ./common.rc +. ./common.filter +. ./common.qemu + +_supported_fmt qcow2 +_supported_proto file +_supported_os Linux + +size=32M + +_make_test_img $size + +echo "Starting QEMU" +_launch_qemu -drive file=$TEST_IMG,if=none,id=drive0,file.locking=on \ + -device virtio-blk-pci,drive=drive0 + +echo +echo "Starting a second QEMU using the same image should fail" +echo 'quit' | $QEMU -monitor stdio \ + -drive file=$TEST_IMG,if=none,id=drive0,file.locking=on \ + -device virtio-blk-pci,drive=drive0 2>&1 | _filter_testdir 2>&1 | + _filter_qemu | + sed -e '/falling back to POSIX file/d' \ + -e '/locks can be lost unexpectedly/d' + +_cleanup_qemu + +# success, all done +echo "*** done" +rm -f $seq.full +status=0 diff --git a/tests/qemu-iotests/182.out b/tests/qemu-iotests/182.out new file mode 100644 index XXXXXXX..XXXXXXX --- /dev/null +++ b/tests/qemu-iotests/182.out @@ -XXX,XX +XXX,XX @@ +QA output created by 182 +Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=33554432 +Starting QEMU + +Starting a second QEMU using the same image should fail +QEMU_PROG: -drive file=TEST_DIR/t.qcow2,if=none,id=drive0,file.locking=on: Failed to get "write" lock +Is another process using the image? +*** done diff --git a/tests/qemu-iotests/group b/tests/qemu-iotests/group index XXXXXXX..XXXXXXX 100644 --- a/tests/qemu-iotests/group +++ b/tests/qemu-iotests/group @@ -XXX,XX +XXX,XX @@ 175 auto quick 176 rw auto backing 181 rw auto migration +182 rw auto quick -- 1.8.3.1 From: Max Reitz <mreitz@redhat.com> When calculating the number of reftable entries, we should actually use the number of refblocks and not (wrongly[1]) re-calculate it. [1] "Wrongly" means: Dividing the number of clusters by the number of entries per refblock and rounding down instead of up. Reported-by: Eric Blake <eblake@redhat.com> Signed-off-by: Max Reitz <mreitz@redhat.com> Reviewed-by: Eric Blake <eblake@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com> --- block/qcow2.c | 9 +++++---- 1 file changed, 5 insertions(+), 4 deletions(-) diff --git a/block/qcow2.c b/block/qcow2.c index XXXXXXX..XXXXXXX 100644 --- a/block/qcow2.c +++ b/block/qcow2.c @@ -XXX,XX +XXX,XX @@ static int qcow2_create2(const char *filename, int64_t total_size, * too, as long as the bulk is allocated here). Therefore, using * floating point arithmetic is fine. */ int64_t meta_size = 0; - uint64_t nreftablee, nrefblocke, nl1e, nl2e; + uint64_t nreftablee, nrefblocke, nl1e, nl2e, refblock_count; int64_t aligned_total_size = align_offset(total_size, cluster_size); int refblock_bits, refblock_size; /* refcount entry size in bytes */ @@ -XXX,XX +XXX,XX @@ static int qcow2_create2(const char *filename, int64_t total_size, nrefblocke = (aligned_total_size + meta_size + cluster_size) / (cluster_size - rces - rces * sizeof(uint64_t) / cluster_size); - meta_size += DIV_ROUND_UP(nrefblocke, refblock_size) * cluster_size; + refblock_count = DIV_ROUND_UP(nrefblocke, refblock_size); + meta_size += refblock_count * cluster_size; /* total size of refcount tables */ - nreftablee = nrefblocke / refblock_size; - nreftablee = align_offset(nreftablee, cluster_size / sizeof(uint64_t)); + nreftablee = align_offset(refblock_count, + cluster_size / sizeof(uint64_t)); meta_size += nreftablee * sizeof(uint64_t); qemu_opt_set_number(opts, BLOCK_OPT_SIZE, -- 1.8.3.1 From: Max Reitz <mreitz@redhat.com> Instead of just freeing preallocated zero clusters and completely allocating them from scratch, reuse them. We cannot do this in handle_copied(), however, since this is a COW operation. Therefore, we have to add the new logic to handle_alloc() and simply return the existing offset if it exists. The only catch is that we have to convince qcow2_alloc_cluster_link_l2() not to free the old clusters (because we have reused them). Reported-by: Eric Blake <eblake@redhat.com> Signed-off-by: Max Reitz <mreitz@redhat.com> Reviewed-by: Eric Blake <eblake@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com> --- block/qcow2-cluster.c | 80 +++++++++++++++++++++++++++++++++++---------------- block/qcow2.h | 3 ++ 2 files changed, 59 insertions(+), 24 deletions(-) diff --git a/block/qcow2-cluster.c b/block/qcow2-cluster.c index XXXXXXX..XXXXXXX 100644 --- a/block/qcow2-cluster.c +++ b/block/qcow2-cluster.c @@ -XXX,XX +XXX,XX @@ static int count_contiguous_clusters(int nb_clusters, int cluster_size, uint64_t *l2_table, uint64_t stop_flags) { int i; + int first_cluster_type; uint64_t mask = stop_flags | L2E_OFFSET_MASK | QCOW_OFLAG_COMPRESSED; uint64_t first_entry = be64_to_cpu(l2_table[0]); uint64_t offset = first_entry & mask; - if (!offset) + if (!offset) { return 0; + } - assert(qcow2_get_cluster_type(first_entry) == QCOW2_CLUSTER_NORMAL); + /* must be allocated */ + first_cluster_type = qcow2_get_cluster_type(first_entry); + assert(first_cluster_type == QCOW2_CLUSTER_NORMAL || + (first_cluster_type == QCOW2_CLUSTER_ZERO && + (first_entry & L2E_OFFSET_MASK) != 0)); for (i = 0; i < nb_clusters; i++) { uint64_t l2_entry = be64_to_cpu(l2_table[i]) & mask; @@ -XXX,XX +XXX,XX @@ int qcow2_alloc_cluster_link_l2(BlockDriverState *bs, QCowL2Meta *m) * Don't discard clusters that reach a refcount of 0 (e.g. compressed * clusters), the next write will reuse them anyway. */ - if (j != 0) { + if (!m->keep_old_clusters && j != 0) { for (i = 0; i < j; i++) { qcow2_free_any_clusters(bs, be64_to_cpu(old_cluster[i]), 1, QCOW2_DISCARD_NEVER); @@ -XXX,XX +XXX,XX @@ static int handle_alloc(BlockDriverState *bs, uint64_t guest_offset, uint64_t entry; uint64_t nb_clusters; int ret; + bool keep_old_clusters = false; - uint64_t alloc_cluster_offset; + uint64_t alloc_cluster_offset = 0; trace_qcow2_handle_alloc(qemu_coroutine_self(), guest_offset, *host_offset, *bytes); @@ -XXX,XX +XXX,XX @@ static int handle_alloc(BlockDriverState *bs, uint64_t guest_offset, * wrong with our code. */ assert(nb_clusters > 0); - qcow2_cache_put(bs, s->l2_table_cache, (void **) &l2_table); + if (qcow2_get_cluster_type(entry) == QCOW2_CLUSTER_ZERO && + (entry & L2E_OFFSET_MASK) != 0 && (entry & QCOW_OFLAG_COPIED) && + (!*host_offset || + start_of_cluster(s, *host_offset) == (entry & L2E_OFFSET_MASK))) + { + /* Try to reuse preallocated zero clusters; contiguous normal clusters + * would be fine, too, but count_cow_clusters() above has limited + * nb_clusters already to a range of COW clusters */ + int preallocated_nb_clusters = + count_contiguous_clusters(nb_clusters, s->cluster_size, + &l2_table[l2_index], QCOW_OFLAG_COPIED); + assert(preallocated_nb_clusters > 0); - /* Allocate, if necessary at a given offset in the image file */ - alloc_cluster_offset = start_of_cluster(s, *host_offset); - ret = do_alloc_cluster_offset(bs, guest_offset, &alloc_cluster_offset, - &nb_clusters); - if (ret < 0) { - goto fail; - } + nb_clusters = preallocated_nb_clusters; + alloc_cluster_offset = entry & L2E_OFFSET_MASK; - /* Can't extend contiguous allocation */ - if (nb_clusters == 0) { - *bytes = 0; - return 0; + /* We want to reuse these clusters, so qcow2_alloc_cluster_link_l2() + * should not free them. */ + keep_old_clusters = true; } - /* !*host_offset would overwrite the image header and is reserved for "no - * host offset preferred". If 0 was a valid host offset, it'd trigger the - * following overlap check; do that now to avoid having an invalid value in - * *host_offset. */ + qcow2_cache_put(bs, s->l2_table_cache, (void **) &l2_table); + if (!alloc_cluster_offset) { - ret = qcow2_pre_write_overlap_check(bs, 0, alloc_cluster_offset, - nb_clusters * s->cluster_size); - assert(ret < 0); - goto fail; + /* Allocate, if necessary at a given offset in the image file */ + alloc_cluster_offset = start_of_cluster(s, *host_offset); + ret = do_alloc_cluster_offset(bs, guest_offset, &alloc_cluster_offset, + &nb_clusters); + if (ret < 0) { + goto fail; + } + + /* Can't extend contiguous allocation */ + if (nb_clusters == 0) { + *bytes = 0; + return 0; + } + + /* !*host_offset would overwrite the image header and is reserved for + * "no host offset preferred". If 0 was a valid host offset, it'd + * trigger the following overlap check; do that now to avoid having an + * invalid value in *host_offset. */ + if (!alloc_cluster_offset) { + ret = qcow2_pre_write_overlap_check(bs, 0, alloc_cluster_offset, + nb_clusters * s->cluster_size); + assert(ret < 0); + goto fail; + } } /* @@ -XXX,XX +XXX,XX @@ static int handle_alloc(BlockDriverState *bs, uint64_t guest_offset, .offset = start_of_cluster(s, guest_offset), .nb_clusters = nb_clusters, + .keep_old_clusters = keep_old_clusters, + .cow_start = { .offset = 0, .nb_bytes = offset_into_cluster(s, guest_offset), diff --git a/block/qcow2.h b/block/qcow2.h index XXXXXXX..XXXXXXX 100644 --- a/block/qcow2.h +++ b/block/qcow2.h @@ -XXX,XX +XXX,XX @@ typedef struct QCowL2Meta /** Number of newly allocated clusters */ int nb_clusters; + /** Do not free the old clusters */ + bool keep_old_clusters; + /** * Requests that overlap with this allocation and wait to be restarted * when the allocating request has completed. -- 1.8.3.1 From: Max Reitz <mreitz@redhat.com> In discard_single_l2(), we completely discard normal clusters instead of simply turning them into preallocated zero clusters. That means we should probably do the same with such preallocated zero clusters: Discard them instead of keeping them allocated. Reported-by: Eric Blake <eblake@redhat.com> Signed-off-by: Max Reitz <mreitz@redhat.com> Reviewed-by: Eric Blake <eblake@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com> --- block/qcow2-cluster.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/block/qcow2-cluster.c b/block/qcow2-cluster.c index XXXXXXX..XXXXXXX 100644 --- a/block/qcow2-cluster.c +++ b/block/qcow2-cluster.c @@ -XXX,XX +XXX,XX @@ static int discard_single_l2(BlockDriverState *bs, uint64_t offset, break; case QCOW2_CLUSTER_ZERO: - if (!full_discard) { + /* Preallocated zero clusters should be discarded in any case */ + if (!full_discard && (old_l2_entry & L2E_OFFSET_MASK) == 0) { continue; } break; -- 1.8.3.1 From: Max Reitz <mreitz@redhat.com> 066 was supposed to be a test "for discarding preallocated zero clusters", but it did so incompletely: While it did check the image file's integrity after the operation, it did not confirm that the clusters are indeed freed. This patch adds this test. In addition, new cases for writing to preallocated zero clusters are added. Signed-off-by: Max Reitz <mreitz@redhat.com> Reviewed-by: Eric Blake <eblake@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com> --- tests/qemu-iotests/066 | 128 ++++++++++++++++++++++++++++++++++++++++++++- tests/qemu-iotests/066.out | 46 ++++++++++++++++ 2 files changed, 173 insertions(+), 1 deletion(-) diff --git a/tests/qemu-iotests/066 b/tests/qemu-iotests/066 index XXXXXXX..XXXXXXX 100755 --- a/tests/qemu-iotests/066 +++ b/tests/qemu-iotests/066 @@ -XXX,XX +XXX,XX @@ #!/bin/bash # -# Test case for discarding preallocated zero clusters in qcow2 +# Test case for preallocated zero clusters in qcow2 # # Copyright (C) 2013 Red Hat, Inc. # @@ -XXX,XX +XXX,XX @@ _make_test_img $IMG_SIZE $QEMU_IO -c "write 0 256k" -c "write -z 0 256k" -c "write 64M 512" \ -c "discard 0 $IMG_SIZE" -c "read -P 0 0 $IMG_SIZE" "$TEST_IMG" \ | _filter_qemu_io + # Check the image (there shouldn't be any leaks) _check_test_img +# Map the image (we want all clusters to be gone) +$QEMU_IMG map "$TEST_IMG" + +_cleanup_test_img + + +echo +echo '=== Writing to preallocated zero clusters ===' +echo + +_make_test_img $IMG_SIZE + +# Create data clusters (not aligned to an L2 table) +$QEMU_IO -c 'write -P 42 1M 256k' "$TEST_IMG" | _filter_qemu_io +orig_map=$($QEMU_IMG map --output=json "$TEST_IMG") + +# Convert the data clusters to preallocated zero clusters +$QEMU_IO -c 'write -z 1M 256k' "$TEST_IMG" | _filter_qemu_io + +# Now write to them (with a COW needed for the head and tail) +$QEMU_IO -c "write -P 23 $(((1024 + 32) * 1024)) 192k" "$TEST_IMG" \ + | _filter_qemu_io + +# Check metadata correctness +_check_test_img + +# Check data correctness +$QEMU_IO -c "read -P 0 $(( 1024 * 1024)) 32k" \ + -c "read -P 23 $(((1024 + 32) * 1024)) 192k" \ + -c "read -P 0 $(((1024 + 32 + 192) * 1024)) 32k" \ + "$TEST_IMG" \ + | _filter_qemu_io + +# Check that we have actually reused the original area +new_map=$($QEMU_IMG map --output=json "$TEST_IMG") +if [ "$new_map" = "$orig_map" ]; then + echo 'Successfully reused original clusters.' +else + echo 'Failed to reuse original clusters.' + echo 'Original map:' + echo "$orig_map" + echo 'New map:' + echo "$new_map" +fi + +_cleanup_test_img + + +echo +echo '=== Writing to a snapshotted preallocated zero cluster ===' +echo + +_make_test_img 64k + +# Create a preallocated zero cluster +$QEMU_IO -c 'write -P 42 0 64k' -c 'write -z 0 64k' "$TEST_IMG" \ + | _filter_qemu_io + +# Snapshot it +$QEMU_IMG snapshot -c foo "$TEST_IMG" + +# Write to the cluster +$QEMU_IO -c 'write -P 23 0 64k' "$TEST_IMG" | _filter_qemu_io + +# Check metadata correctness +_check_test_img + +# Check data correctness +$QEMU_IO -c 'read -P 23 0 64k' "$TEST_IMG" | _filter_qemu_io +$QEMU_IMG snapshot -a foo "$TEST_IMG" +$QEMU_IO -c 'read -P 0 0 64k' "$TEST_IMG" | _filter_qemu_io + +_cleanup_test_img + + +echo +echo '=== Consecutive write to a preallocated zero cluster ===' +echo + +_make_test_img 192k + +# Create three normal clusters +$QEMU_IO -c 'write -P 42 0 192k' "$TEST_IMG" | _filter_qemu_io +orig_map=$($QEMU_IMG map --output=json "$TEST_IMG") + +# Make the middle cluster a preallocated zero cluster +$QEMU_IO -c 'write -z 64k 64k' "$TEST_IMG" | _filter_qemu_io + +# Try to overwrite everything: This should reuse the whole range. To test that +# this only issues a single continuous write request, use blkdebug. +$QEMU_IO -c 'write -P 42 0 192k' \ + "json:{ + 'driver': '$IMGFMT', + 'file': { + 'driver': 'blkdebug', + 'image.filename': '$TEST_IMG', + 'set-state': [{ + 'event': 'write_aio', + 'new_state': 2 + }], + 'inject-error': [{ + 'event': 'write_aio', + 'state': 2 + }] + } + }" \ + | _filter_qemu_io + +# Check metadata correctness +_check_test_img + +# Check that we have actually reused the original area +new_map=$($QEMU_IMG map --output=json "$TEST_IMG") +if [ "$new_map" = "$orig_map" ]; then + echo 'Successfully reused original clusters.' +else + echo 'Failed to reuse original clusters.' + echo 'Original map:' + echo "$orig_map" + echo 'New map:' + echo "$new_map" +fi + +_cleanup_test_img + # success, all done echo "*** done" diff --git a/tests/qemu-iotests/066.out b/tests/qemu-iotests/066.out index XXXXXXX..XXXXXXX 100644 --- a/tests/qemu-iotests/066.out +++ b/tests/qemu-iotests/066.out @@ -XXX,XX +XXX,XX @@ discard 67109376/67109376 bytes at offset 0 read 67109376/67109376 bytes at offset 0 64 MiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec) No errors were found on the image. +Offset Length Mapped to File + +=== Writing to preallocated zero clusters === + +Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=67109376 +wrote 262144/262144 bytes at offset 1048576 +256 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec) +wrote 262144/262144 bytes at offset 1048576 +256 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec) +wrote 196608/196608 bytes at offset 1081344 +192 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec) +No errors were found on the image. +read 32768/32768 bytes at offset 1048576 +32 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec) +read 196608/196608 bytes at offset 1081344 +192 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec) +read 32768/32768 bytes at offset 1277952 +32 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec) +Successfully reused original clusters. + +=== Writing to a snapshotted preallocated zero cluster === + +Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=65536 +wrote 65536/65536 bytes at offset 0 +64 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec) +wrote 65536/65536 bytes at offset 0 +64 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec) +wrote 65536/65536 bytes at offset 0 +64 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec) +No errors were found on the image. +read 65536/65536 bytes at offset 0 +64 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec) +read 65536/65536 bytes at offset 0 +64 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec) + +=== Consecutive write to a preallocated zero cluster === + +Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=196608 +wrote 196608/196608 bytes at offset 0 +192 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec) +wrote 65536/65536 bytes at offset 65536 +64 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec) +wrote 196608/196608 bytes at offset 0 +192 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec) +No errors were found on the image. +Successfully reused original clusters. *** done -- 1.8.3.1 Migration code activates all block driver nodes on the destination when the migration completes. It does so by calling bdrv_invalidate_cache_all() and blk_resume_after_migration(). There is one code path for precopy and one for postcopy migration, resulting in four function calls, which used to have three different failure modes. This patch unifies the behaviour so that failure to activate all block nodes is non-fatal, but the error message is logged and the VM isn't automatically started. 'cont' will retry activating the block nodes. Signed-off-by: Kevin Wolf <kwolf@redhat.com> Reviewed-by: Eric Blake <eblake@redhat.com> --- migration/migration.c | 16 +++++----------- migration/savevm.c | 12 +++++------- qmp.c | 18 +++++++++--------- 3 files changed, 19 insertions(+), 27 deletions(-) diff --git a/migration/migration.c b/migration/migration.c index XXXXXXX..XXXXXXX 100644 --- a/migration/migration.c +++ b/migration/migration.c @@ -XXX,XX +XXX,XX @@ static void process_incoming_migration_bh(void *opaque) Error *local_err = NULL; MigrationIncomingState *mis = opaque; - /* Make sure all file formats flush their mutable metadata */ + /* Make sure all file formats flush their mutable metadata. + * If we get an error here, just don't restart the VM yet. */ bdrv_invalidate_cache_all(&local_err); - if (local_err) { - migrate_set_state(&mis->state, MIGRATION_STATUS_ACTIVE, - MIGRATION_STATUS_FAILED); - error_report_err(local_err); - migrate_decompress_threads_join(); - exit(EXIT_FAILURE); + if (!local_err) { + blk_resume_after_migration(&local_err); } - - /* If we get an error here, just don't restart the VM yet. */ - blk_resume_after_migration(&local_err); if (local_err) { - error_free(local_err); + error_report_err(local_err); local_err = NULL; autostart = false; } diff --git a/migration/savevm.c b/migration/savevm.c index XXXXXXX..XXXXXXX 100644 --- a/migration/savevm.c +++ b/migration/savevm.c @@ -XXX,XX +XXX,XX @@ static void loadvm_postcopy_handle_run_bh(void *opaque) qemu_announce_self(); - /* Make sure all file formats flush their mutable metadata */ + /* Make sure all file formats flush their mutable metadata. + * If we get an error here, just don't restart the VM yet. */ bdrv_invalidate_cache_all(&local_err); - if (local_err) { - error_report_err(local_err); + if (!local_err) { + blk_resume_after_migration(&local_err); } - - /* If we get an error here, just don't restart the VM yet. */ - blk_resume_after_migration(&local_err); if (local_err) { - error_free(local_err); + error_report_err(local_err); local_err = NULL; autostart = false; } diff --git a/qmp.c b/qmp.c index XXXXXXX..XXXXXXX 100644 --- a/qmp.c +++ b/qmp.c @@ -XXX,XX +XXX,XX @@ void qmp_cont(Error **errp) } /* Continuing after completed migration. Images have been inactivated to - * allow the destination to take control. Need to get control back now. */ - if (runstate_check(RUN_STATE_FINISH_MIGRATE) || - runstate_check(RUN_STATE_POSTMIGRATE)) - { - bdrv_invalidate_cache_all(&local_err); - if (local_err) { - error_propagate(errp, local_err); - return; - } + * allow the destination to take control. Need to get control back now. + * + * If there are no inactive block nodes (e.g. because the VM was just + * paused rather than completing a migration), bdrv_inactivate_all() simply + * doesn't do anything. */ + bdrv_invalidate_cache_all(&local_err); + if (local_err) { + error_propagate(errp, local_err); + return; } blk_resume_after_migration(&local_err); -- 1.8.3.1 Instead of manually calling blk_resume_after_migration() in migration code after doing bdrv_invalidate_cache_all(), integrate the BlockBackend activation with cache invalidation into a single function. This is achieved with a new callback in BdrvChildRole that is called by bdrv_invalidate_cache_all(). Signed-off-by: Kevin Wolf <kwolf@redhat.com> Reviewed-by: Eric Blake <eblake@redhat.com> --- block.c | 12 +++++++++- block/block-backend.c | 56 +++++++++++++++++++++++------------------------ include/block/block.h | 2 -- include/block/block_int.h | 5 +++++ migration/migration.c | 3 --- migration/savevm.c | 3 --- qmp.c | 6 ----- 7 files changed, 44 insertions(+), 43 deletions(-) diff --git a/block.c b/block.c index XXXXXXX..XXXXXXX 100644 --- a/block.c +++ b/block.c @@ -XXX,XX +XXX,XX @@ void bdrv_init_with_whitelist(void) void bdrv_invalidate_cache(BlockDriverState *bs, Error **errp) { - BdrvChild *child; + BdrvChild *child, *parent; Error *local_err = NULL; int ret; @@ -XXX,XX +XXX,XX @@ void bdrv_invalidate_cache(BlockDriverState *bs, Error **errp) error_setg_errno(errp, -ret, "Could not refresh total sector count"); return; } + + QLIST_FOREACH(parent, &bs->parents, next_parent) { + if (parent->role->activate) { + parent->role->activate(parent, &local_err); + if (local_err) { + error_propagate(errp, local_err); + return; + } + } + } } void bdrv_invalidate_cache_all(Error **errp) diff --git a/block/block-backend.c b/block/block-backend.c index XXXXXXX..XXXXXXX 100644 --- a/block/block-backend.c +++ b/block/block-backend.c @@ -XXX,XX +XXX,XX @@ static const char *blk_root_get_name(BdrvChild *child) return blk_name(child->opaque); } +/* + * Notifies the user of the BlockBackend that migration has completed. qdev + * devices can tighten their permissions in response (specifically revoke + * shared write permissions that we needed for storage migration). + * + * If an error is returned, the VM cannot be allowed to be resumed. + */ +static void blk_root_activate(BdrvChild *child, Error **errp) +{ + BlockBackend *blk = child->opaque; + Error *local_err = NULL; + + if (!blk->disable_perm) { + return; + } + + blk->disable_perm = false; + + blk_set_perm(blk, blk->perm, blk->shared_perm, &local_err); + if (local_err) { + error_propagate(errp, local_err); + blk->disable_perm = true; + return; + } +} + static const BdrvChildRole child_root = { .inherit_options = blk_root_inherit_options, @@ -XXX,XX +XXX,XX @@ static const BdrvChildRole child_root = { .drained_begin = blk_root_drained_begin, .drained_end = blk_root_drained_end, + + .activate = blk_root_activate, }; /* @@ -XXX,XX +XXX,XX @@ void blk_get_perm(BlockBackend *blk, uint64_t *perm, uint64_t *shared_perm) *shared_perm = blk->shared_perm; } -/* - * Notifies the user of all BlockBackends that migration has completed. qdev - * devices can tighten their permissions in response (specifically revoke - * shared write permissions that we needed for storage migration). - * - * If an error is returned, the VM cannot be allowed to be resumed. - */ -void blk_resume_after_migration(Error **errp) -{ - BlockBackend *blk; - Error *local_err = NULL; - - for (blk = blk_all_next(NULL); blk; blk = blk_all_next(blk)) { - if (!blk->disable_perm) { - continue; - } - - blk->disable_perm = false; - - blk_set_perm(blk, blk->perm, blk->shared_perm, &local_err); - if (local_err) { - error_propagate(errp, local_err); - blk->disable_perm = true; - return; - } - } -} - static int blk_do_attach_dev(BlockBackend *blk, void *dev) { if (blk->dev) { diff --git a/include/block/block.h b/include/block/block.h index XXXXXXX..XXXXXXX 100644 --- a/include/block/block.h +++ b/include/block/block.h @@ -XXX,XX +XXX,XX @@ void bdrv_invalidate_cache(BlockDriverState *bs, Error **errp); void bdrv_invalidate_cache_all(Error **errp); int bdrv_inactivate_all(void); -void blk_resume_after_migration(Error **errp); - /* Ensure contents are flushed to disk. */ int bdrv_flush(BlockDriverState *bs); int coroutine_fn bdrv_co_flush(BlockDriverState *bs); diff --git a/include/block/block_int.h b/include/block/block_int.h index XXXXXXX..XXXXXXX 100644 --- a/include/block/block_int.h +++ b/include/block/block_int.h @@ -XXX,XX +XXX,XX @@ struct BdrvChildRole { void (*drained_begin)(BdrvChild *child); void (*drained_end)(BdrvChild *child); + /* Notifies the parent that the child has been activated (e.g. when + * migration is completing) and it can start requesting permissions and + * doing I/O on it. */ + void (*activate)(BdrvChild *child, Error **errp); + void (*attach)(BdrvChild *child); void (*detach)(BdrvChild *child); }; diff --git a/migration/migration.c b/migration/migration.c index XXXXXXX..XXXXXXX 100644 --- a/migration/migration.c +++ b/migration/migration.c @@ -XXX,XX +XXX,XX @@ static void process_incoming_migration_bh(void *opaque) /* Make sure all file formats flush their mutable metadata. * If we get an error here, just don't restart the VM yet. */ bdrv_invalidate_cache_all(&local_err); - if (!local_err) { - blk_resume_after_migration(&local_err); - } if (local_err) { error_report_err(local_err); local_err = NULL; diff --git a/migration/savevm.c b/migration/savevm.c index XXXXXXX..XXXXXXX 100644 --- a/migration/savevm.c +++ b/migration/savevm.c @@ -XXX,XX +XXX,XX @@ static void loadvm_postcopy_handle_run_bh(void *opaque) /* Make sure all file formats flush their mutable metadata. * If we get an error here, just don't restart the VM yet. */ bdrv_invalidate_cache_all(&local_err); - if (!local_err) { - blk_resume_after_migration(&local_err); - } if (local_err) { error_report_err(local_err); local_err = NULL; diff --git a/qmp.c b/qmp.c index XXXXXXX..XXXXXXX 100644 --- a/qmp.c +++ b/qmp.c @@ -XXX,XX +XXX,XX @@ void qmp_cont(Error **errp) return; } - blk_resume_after_migration(&local_err); - if (local_err) { - error_propagate(errp, local_err); - return; - } - if (runstate_check(RUN_STATE_INMIGRATE)) { autostart = 1; } else { -- 1.8.3.1 With image locking, permissions affect other qemu processes as well. We want to be sure that the destination can run, so let's drop permissions on the source when migration completes. Signed-off-by: Kevin Wolf <kwolf@redhat.com> Reviewed-by: Eric Blake <eblake@redhat.com> --- block.c | 12 +++++++++++- block/block-backend.c | 25 +++++++++++++++++++++++++ include/block/block_int.h | 7 ++++--- 3 files changed, 40 insertions(+), 4 deletions(-) diff --git a/block.c b/block.c index XXXXXXX..XXXXXXX 100644 --- a/block.c +++ b/block.c @@ -XXX,XX +XXX,XX @@ void bdrv_invalidate_cache_all(Error **errp) static int bdrv_inactivate_recurse(BlockDriverState *bs, bool setting_flag) { - BdrvChild *child; + BdrvChild *child, *parent; int ret; if (!setting_flag && bs->drv->bdrv_inactivate) { @@ -XXX,XX +XXX,XX @@ static int bdrv_inactivate_recurse(BlockDriverState *bs, if (setting_flag) { bs->open_flags |= BDRV_O_INACTIVE; + + QLIST_FOREACH(parent, &bs->parents, next_parent) { + if (parent->role->inactivate) { + ret = parent->role->inactivate(parent); + if (ret < 0) { + bs->open_flags &= ~BDRV_O_INACTIVE; + return ret; + } + } + } } return 0; } diff --git a/block/block-backend.c b/block/block-backend.c index XXXXXXX..XXXXXXX 100644 --- a/block/block-backend.c +++ b/block/block-backend.c @@ -XXX,XX +XXX,XX @@ static void blk_root_activate(BdrvChild *child, Error **errp) } } +static int blk_root_inactivate(BdrvChild *child) +{ + BlockBackend *blk = child->opaque; + + if (blk->disable_perm) { + return 0; + } + + /* Only inactivate BlockBackends for guest devices (which are inactive at + * this point because the VM is stopped) and unattached monitor-owned + * BlockBackends. If there is still any other user like a block job, then + * we simply can't inactivate the image. */ + if (!blk->dev && !blk->name[0]) { + return -EPERM; + } + + blk->disable_perm = true; + if (blk->root) { + bdrv_child_try_set_perm(blk->root, 0, BLK_PERM_ALL, &error_abort); + } + + return 0; +} + static const BdrvChildRole child_root = { .inherit_options = blk_root_inherit_options, @@ -XXX,XX +XXX,XX @@ static const BdrvChildRole child_root = { .drained_end = blk_root_drained_end, .activate = blk_root_activate, + .inactivate = blk_root_inactivate, }; /* diff --git a/include/block/block_int.h b/include/block/block_int.h index XXXXXXX..XXXXXXX 100644 --- a/include/block/block_int.h +++ b/include/block/block_int.h @@ -XXX,XX +XXX,XX @@ struct BdrvChildRole { void (*drained_begin)(BdrvChild *child); void (*drained_end)(BdrvChild *child); - /* Notifies the parent that the child has been activated (e.g. when - * migration is completing) and it can start requesting permissions and - * doing I/O on it. */ + /* Notifies the parent that the child has been activated/inactivated (e.g. + * when migration is completing) and it can start/stop requesting + * permissions and doing I/O on it. */ void (*activate)(BdrvChild *child, Error **errp); + int (*inactivate)(BdrvChild *child); void (*attach)(BdrvChild *child); void (*detach)(BdrvChild *child); -- 1.8.3.1 The proper order for inactivating block nodes is that first the parents get inactivated and then the children. If we do things in this order, we can assert that we didn't accidentally leave a parent activated when one of its child nodes is inactive. Signed-off-by: Kevin Wolf <kwolf@redhat.com> Reviewed-by: Eric Blake <eblake@redhat.com> --- block.c | 25 ++++++++++++++++++------- 1 file changed, 18 insertions(+), 7 deletions(-) diff --git a/block.c b/block.c index XXXXXXX..XXXXXXX 100644 --- a/block.c +++ b/block.c @@ -XXX,XX +XXX,XX @@ static void bdrv_child_cb_drained_end(BdrvChild *child) bdrv_drained_end(bs); } +static int bdrv_child_cb_inactivate(BdrvChild *child) +{ + BlockDriverState *bs = child->opaque; + assert(bs->open_flags & BDRV_O_INACTIVE); + return 0; +} + /* * Returns the options and flags that a temporary snapshot should get, based on * the originally requested flags (the originally requested image will have @@ -XXX,XX +XXX,XX @@ const BdrvChildRole child_file = { .inherit_options = bdrv_inherited_options, .drained_begin = bdrv_child_cb_drained_begin, .drained_end = bdrv_child_cb_drained_end, + .inactivate = bdrv_child_cb_inactivate, }; /* @@ -XXX,XX +XXX,XX @@ const BdrvChildRole child_format = { .inherit_options = bdrv_inherited_fmt_options, .drained_begin = bdrv_child_cb_drained_begin, .drained_end = bdrv_child_cb_drained_end, + .inactivate = bdrv_child_cb_inactivate, }; static void bdrv_backing_attach(BdrvChild *c) @@ -XXX,XX +XXX,XX @@ const BdrvChildRole child_backing = { .inherit_options = bdrv_backing_options, .drained_begin = bdrv_child_cb_drained_begin, .drained_end = bdrv_child_cb_drained_end, + .inactivate = bdrv_child_cb_inactivate, }; static int bdrv_open_flags(BlockDriverState *bs, int flags) @@ -XXX,XX +XXX,XX @@ static int bdrv_inactivate_recurse(BlockDriverState *bs, } } - QLIST_FOREACH(child, &bs->children, next) { - ret = bdrv_inactivate_recurse(child->bs, setting_flag); - if (ret < 0) { - return ret; - } - } - if (setting_flag) { bs->open_flags |= BDRV_O_INACTIVE; @@ -XXX,XX +XXX,XX @@ static int bdrv_inactivate_recurse(BlockDriverState *bs, } } } + + QLIST_FOREACH(child, &bs->children, next) { + ret = bdrv_inactivate_recurse(child->bs, setting_flag); + if (ret < 0) { + return ret; + } + } + return 0; } -- 1.8.3.1 Format drivers for inactive nodes don't need write/resize permissions on their bs->file and can share write/resize with another VM (in fact, this is the whole point of keeping images inactive). Represent this fact in the op blocker system, so that image locking does the right thing without special-casing inactive images. Signed-off-by: Kevin Wolf <kwolf@redhat.com> Reviewed-by: Eric Blake <eblake@redhat.com> --- block.c | 35 +++++++++++++++++++++++++++++++++-- include/block/block.h | 1 + 2 files changed, 34 insertions(+), 2 deletions(-) diff --git a/block.c b/block.c index XXXXXXX..XXXXXXX 100644 --- a/block.c +++ b/block.c @@ -XXX,XX +XXX,XX @@ void path_combine(char *dest, int dest_size, } } +/* Returns whether the image file is opened as read-only. Note that this can + * return false and writing to the image file is still not possible because the + * image is inactivated. */ bool bdrv_is_read_only(BlockDriverState *bs) { return bs->read_only; } +/* Returns whether the image file can be written to right now */ +bool bdrv_is_writable(BlockDriverState *bs) +{ + return !bdrv_is_read_only(bs) && !(bs->open_flags & BDRV_O_INACTIVE); +} + int bdrv_can_set_read_only(BlockDriverState *bs, bool read_only, Error **errp) { /* Do not set read_only if copy_on_read is enabled */ @@ -XXX,XX +XXX,XX @@ static int bdrv_check_perm(BlockDriverState *bs, uint64_t cumulative_perms, /* Write permissions never work with read-only images */ if ((cumulative_perms & (BLK_PERM_WRITE | BLK_PERM_WRITE_UNCHANGED)) && - bdrv_is_read_only(bs)) + !bdrv_is_writable(bs)) { error_setg(errp, "Block node is read-only"); return -EPERM; @@ -XXX,XX +XXX,XX @@ void bdrv_format_default_perms(BlockDriverState *bs, BdrvChild *c, bdrv_filter_default_perms(bs, c, role, perm, shared, &perm, &shared); /* Format drivers may touch metadata even if the guest doesn't write */ - if (!bdrv_is_read_only(bs)) { + if (bdrv_is_writable(bs)) { perm |= BLK_PERM_WRITE | BLK_PERM_RESIZE; } @@ -XXX,XX +XXX,XX @@ void bdrv_format_default_perms(BlockDriverState *bs, BdrvChild *c, BLK_PERM_WRITE_UNCHANGED; } + if (bs->open_flags & BDRV_O_INACTIVE) { + shared |= BLK_PERM_WRITE | BLK_PERM_RESIZE; + } + *nperm = perm; *nshared = shared; } @@ -XXX,XX +XXX,XX @@ void bdrv_init_with_whitelist(void) void bdrv_invalidate_cache(BlockDriverState *bs, Error **errp) { BdrvChild *child, *parent; + uint64_t perm, shared_perm; Error *local_err = NULL; int ret; @@ -XXX,XX +XXX,XX @@ void bdrv_invalidate_cache(BlockDriverState *bs, Error **errp) return; } + /* Update permissions, they may differ for inactive nodes */ + bdrv_get_cumulative_perm(bs, &perm, &shared_perm); + ret = bdrv_check_perm(bs, perm, shared_perm, NULL, &local_err); + if (ret < 0) { + bs->open_flags |= BDRV_O_INACTIVE; + error_propagate(errp, local_err); + return; + } + bdrv_set_perm(bs, perm, shared_perm); + QLIST_FOREACH(parent, &bs->parents, next_parent) { if (parent->role->activate) { parent->role->activate(parent, &local_err); @@ -XXX,XX +XXX,XX @@ static int bdrv_inactivate_recurse(BlockDriverState *bs, } if (setting_flag) { + uint64_t perm, shared_perm; + bs->open_flags |= BDRV_O_INACTIVE; QLIST_FOREACH(parent, &bs->parents, next_parent) { @@ -XXX,XX +XXX,XX @@ static int bdrv_inactivate_recurse(BlockDriverState *bs, } } } + + /* Update permissions, they may differ for inactive nodes */ + bdrv_get_cumulative_perm(bs, &perm, &shared_perm); + bdrv_check_perm(bs, perm, shared_perm, NULL, &error_abort); + bdrv_set_perm(bs, perm, shared_perm); } QLIST_FOREACH(child, &bs->children, next) { diff --git a/include/block/block.h b/include/block/block.h index XXXXXXX..XXXXXXX 100644 --- a/include/block/block.h +++ b/include/block/block.h @@ -XXX,XX +XXX,XX @@ int bdrv_is_allocated_above(BlockDriverState *top, BlockDriverState *base, int64_t sector_num, int nb_sectors, int *pnum); bool bdrv_is_read_only(BlockDriverState *bs); +bool bdrv_is_writable(BlockDriverState *bs); int bdrv_can_set_read_only(BlockDriverState *bs, bool read_only, Error **errp); int bdrv_set_read_only(BlockDriverState *bs, bool read_only, Error **errp); bool bdrv_is_sg(BlockDriverState *bs); -- 1.8.3.1 Now that the block layer takes care to request a lot less permissions for inactive nodes, the special-casing in file-posix isn't necessary any more. Signed-off-by: Kevin Wolf <kwolf@redhat.com> Reviewed-by: Eric Blake <eblake@redhat.com> --- block/file-posix.c | 33 --------------------------------- 1 file changed, 33 deletions(-) diff --git a/block/file-posix.c b/block/file-posix.c index XXXXXXX..XXXXXXX 100644 --- a/block/file-posix.c +++ b/block/file-posix.c @@ -XXX,XX +XXX,XX @@ static void raw_abort_perm_update(BlockDriverState *bs) raw_handle_perm_lock(bs, RAW_PL_ABORT, 0, 0, NULL); } -static int raw_inactivate(BlockDriverState *bs) -{ - int ret; - uint64_t perm = 0; - uint64_t shared = BLK_PERM_ALL; - - ret = raw_handle_perm_lock(bs, RAW_PL_PREPARE, perm, shared, NULL); - if (ret) { - return ret; - } - raw_handle_perm_lock(bs, RAW_PL_COMMIT, perm, shared, NULL); - return 0; -} - - -static void raw_invalidate_cache(BlockDriverState *bs, Error **errp) -{ - BDRVRawState *s = bs->opaque; - int ret; - - assert(!(bdrv_get_flags(bs) & BDRV_O_INACTIVE)); - ret = raw_handle_perm_lock(bs, RAW_PL_PREPARE, s->perm, s->shared_perm, - errp); - if (ret) { - return; - } - raw_handle_perm_lock(bs, RAW_PL_COMMIT, s->perm, s->shared_perm, NULL); -} - BlockDriver bdrv_file = { .format_name = "file", .protocol_name = "file", @@ -XXX,XX +XXX,XX @@ BlockDriver bdrv_file = { .bdrv_get_info = raw_get_info, .bdrv_get_allocated_file_size = raw_get_allocated_file_size, - .bdrv_inactivate = raw_inactivate, - .bdrv_invalidate_cache = raw_invalidate_cache, .bdrv_check_perm = raw_check_perm, .bdrv_set_perm = raw_set_perm, .bdrv_abort_perm_update = raw_abort_perm_update, @@ -XXX,XX +XXX,XX @@ static BlockDriver bdrv_host_device = { .bdrv_get_info = raw_get_info, .bdrv_get_allocated_file_size = raw_get_allocated_file_size, - .bdrv_inactivate = raw_inactivate, - .bdrv_invalidate_cache = raw_invalidate_cache, .bdrv_check_perm = raw_check_perm, .bdrv_set_perm = raw_set_perm, .bdrv_abort_perm_update = raw_abort_perm_update, -- 1.8.3.1 From: Anton Nefedov <anton.nefedov@virtuozzo.com> On error path (like i/o error in one of the coroutines), it's required to - wait for coroutines completion before cleaning the common structures - reenter dependent coroutines so they ever finish Introduced in 2d9187bc65. Cc: qemu-stable@nongnu.org Signed-off-by: Anton Nefedov <anton.nefedov@virtuozzo.com> Reviewed-by: Peter Lieven <pl@kamp.de> Signed-off-by: Kevin Wolf <kwolf@redhat.com> --- qemu-img.c | 26 +++++++++++--------------- 1 file changed, 11 insertions(+), 15 deletions(-) diff --git a/qemu-img.c b/qemu-img.c index XXXXXXX..XXXXXXX 100644 --- a/qemu-img.c +++ b/qemu-img.c @@ -XXX,XX +XXX,XX @@ static void coroutine_fn convert_co_do_copy(void *opaque) qemu_co_mutex_lock(&s->lock); if (s->ret != -EINPROGRESS || s->sector_num >= s->total_sectors) { qemu_co_mutex_unlock(&s->lock); - goto out; + break; } n = convert_iteration_sectors(s, s->sector_num); if (n < 0) { qemu_co_mutex_unlock(&s->lock); s->ret = n; - goto out; + break; } /* save current sector and allocation status to local variables */ sector_num = s->sector_num; @@ -XXX,XX +XXX,XX @@ static void coroutine_fn convert_co_do_copy(void *opaque) error_report("error while reading sector %" PRId64 ": %s", sector_num, strerror(-ret)); s->ret = ret; - goto out; } } else if (!s->min_sparse && status == BLK_ZERO) { status = BLK_DATA; @@ -XXX,XX +XXX,XX @@ static void coroutine_fn convert_co_do_copy(void *opaque) if (s->wr_in_order) { /* keep writes in order */ - while (s->wr_offs != sector_num) { - if (s->ret != -EINPROGRESS) { - goto out; - } + while (s->wr_offs != sector_num && s->ret == -EINPROGRESS) { s->wait_sector_num[index] = sector_num; qemu_coroutine_yield(); } s->wait_sector_num[index] = -1; } - ret = convert_co_write(s, sector_num, n, buf, status); - if (ret < 0) { - error_report("error while writing sector %" PRId64 - ": %s", sector_num, strerror(-ret)); - s->ret = ret; - goto out; + if (s->ret == -EINPROGRESS) { + ret = convert_co_write(s, sector_num, n, buf, status); + if (ret < 0) { + error_report("error while writing sector %" PRId64 + ": %s", sector_num, strerror(-ret)); + s->ret = ret; + } } if (s->wr_in_order) { @@ -XXX,XX +XXX,XX @@ static void coroutine_fn convert_co_do_copy(void *opaque) } } -out: qemu_vfree(buf); s->co[index] = NULL; s->running_coroutines--; @@ -XXX,XX +XXX,XX @@ static int convert_do_copy(ImgConvertState *s) qemu_coroutine_enter(s->co[i]); } - while (s->ret == -EINPROGRESS) { + while (s->running_coroutines) { main_loop_wait(false); } -- 1.8.3.1 From: Christoph Hellwig <hch@lst.de> Signed-off-by: Keith Busch <keith.busch@intel.com> [hch: ported over from qemu-nvme.git to mainline] Signed-off-by: Christoph Hellwig <hch@lst.de> Acked-by: Keith Busch <keith.busch@intel.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com> --- hw/block/nvme.c | 26 ++++++++++++++++++++++++++ hw/block/nvme.h | 1 + 2 files changed, 27 insertions(+) diff --git a/hw/block/nvme.c b/hw/block/nvme.c index XXXXXXX..XXXXXXX 100644 --- a/hw/block/nvme.c +++ b/hw/block/nvme.c @@ -XXX,XX +XXX,XX @@ static uint16_t nvme_flush(NvmeCtrl *n, NvmeNamespace *ns, NvmeCmd *cmd, return NVME_NO_COMPLETE; } +static uint16_t nvme_write_zeros(NvmeCtrl *n, NvmeNamespace *ns, NvmeCmd *cmd, + NvmeRequest *req) +{ + NvmeRwCmd *rw = (NvmeRwCmd *)cmd; + const uint8_t lba_index = NVME_ID_NS_FLBAS_INDEX(ns->id_ns.flbas); + const uint8_t data_shift = ns->id_ns.lbaf[lba_index].ds; + uint64_t slba = le64_to_cpu(rw->slba); + uint32_t nlb = le16_to_cpu(rw->nlb) + 1; + uint64_t aio_slba = slba << (data_shift - BDRV_SECTOR_BITS); + uint32_t aio_nlb = nlb << (data_shift - BDRV_SECTOR_BITS); + + if (slba + nlb > ns->id_ns.nsze) { + return NVME_LBA_RANGE | NVME_DNR; + } + + req->has_sg = false; + block_acct_start(blk_get_stats(n->conf.blk), &req->acct, 0, + BLOCK_ACCT_WRITE); + req->aiocb = blk_aio_pwrite_zeroes(n->conf.blk, aio_slba, aio_nlb, + BDRV_REQ_MAY_UNMAP, nvme_rw_cb, req); + return NVME_NO_COMPLETE; +} + static uint16_t nvme_rw(NvmeCtrl *n, NvmeNamespace *ns, NvmeCmd *cmd, NvmeRequest *req) { @@ -XXX,XX +XXX,XX @@ static uint16_t nvme_io_cmd(NvmeCtrl *n, NvmeCmd *cmd, NvmeRequest *req) switch (cmd->opcode) { case NVME_CMD_FLUSH: return nvme_flush(n, ns, cmd, req); + case NVME_CMD_WRITE_ZEROS: + return nvme_write_zeros(n, ns, cmd, req); case NVME_CMD_WRITE: case NVME_CMD_READ: return nvme_rw(n, ns, cmd, req); @@ -XXX,XX +XXX,XX @@ static int nvme_init(PCIDevice *pci_dev) id->sqes = (0x6 << 4) | 0x6; id->cqes = (0x4 << 4) | 0x4; id->nn = cpu_to_le32(n->num_namespaces); + id->oncs = cpu_to_le16(NVME_ONCS_WRITE_ZEROS); id->psd[0].mp = cpu_to_le16(0x9c4); id->psd[0].enlat = cpu_to_le32(0x10); id->psd[0].exlat = cpu_to_le32(0x4); diff --git a/hw/block/nvme.h b/hw/block/nvme.h index XXXXXXX..XXXXXXX 100644 --- a/hw/block/nvme.h +++ b/hw/block/nvme.h @@ -XXX,XX +XXX,XX @@ enum NvmeIoCommands { NVME_CMD_READ = 0x02, NVME_CMD_WRITE_UNCOR = 0x04, NVME_CMD_COMPARE = 0x05, + NVME_CMD_WRITE_ZEROS = 0x08, NVME_CMD_DSM = 0x09, }; -- 1.8.3.1 From: John Snow <jsnow@redhat.com> Fixes: https://bugzilla.redhat.com/show_bug.cgi?id=1447551 If one tries to issue a block_resize while a guest is busy accessing the disk, it is possible that qemu may deadlock when invoking aio_poll from both the main loop and the iothread. Replace another instance of bdrv_drain_all that doesn't quite belong. Cc: qemu-stable@nongnu.org Suggested-by: Paolo Bonzini <pbonzini@redhat.com> Signed-off-by: John Snow <jsnow@redhat.com> Reviewed-by: Eric Blake <eblake@redhat.com> Reviewed-by: Paolo Bonzini <pbonzini@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com> --- blockdev.c | 5 ++--- 1 file changed, 2 insertions(+), 3 deletions(-) diff --git a/blockdev.c b/blockdev.c index XXXXXXX..XXXXXXX 100644 --- a/blockdev.c +++ b/blockdev.c @@ -XXX,XX +XXX,XX @@ void qmp_block_resize(bool has_device, const char *device, goto out; } - /* complete all in-flight operations before resizing the device */ - bdrv_drain_all(); - + bdrv_drained_begin(bs); ret = blk_truncate(blk, size, errp); + bdrv_drained_end(bs); out: blk_unref(blk); -- 1.8.3.1 From: Eric Blake <eblake@redhat.com> Several copy-and-pasted alignment checks exist in qemu-io, which could use some minor improvements: - Manual comparison against 0x1ff is not as clean as using our alignment macros (QEMU_IS_ALIGNED) from osdep.h. - The error messages aren't quite grammatically correct. Suggested-by: Philippe Mathieu-Daudé <f4bug@amsat.org> Suggested-by: Max Reitz <mreitz@redhat.com> Signed-off-by: Eric Blake <eblake@redhat.com> Message-id: 20170429191419.30051-2-eblake@redhat.com Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org> Reviewed-by: Max Reitz <mreitz@redhat.com> Signed-off-by: Max Reitz <mreitz@redhat.com> --- qemu-io-cmds.c | 20 ++++++++++---------- 1 file changed, 10 insertions(+), 10 deletions(-) diff --git a/qemu-io-cmds.c b/qemu-io-cmds.c index XXXXXXX..XXXXXXX 100644 --- a/qemu-io-cmds.c +++ b/qemu-io-cmds.c @@ -XXX,XX +XXX,XX @@ static int read_f(BlockBackend *blk, int argc, char **argv) } if (bflag) { - if (offset & 0x1ff) { - printf("offset %" PRId64 " is not sector aligned\n", + if (!QEMU_IS_ALIGNED(offset, BDRV_SECTOR_SIZE)) { + printf("%" PRId64 " is not a sector-aligned value for 'offset'\n", offset); return 0; } - if (count & 0x1ff) { - printf("count %"PRId64" is not sector aligned\n", + if (!QEMU_IS_ALIGNED(count, BDRV_SECTOR_SIZE)) { + printf("%"PRId64" is not a sector-aligned value for 'count'\n", count); return 0; } @@ -XXX,XX +XXX,XX @@ static int write_f(BlockBackend *blk, int argc, char **argv) } if (bflag || cflag) { - if (offset & 0x1ff) { - printf("offset %" PRId64 " is not sector aligned\n", + if (!QEMU_IS_ALIGNED(offset, BDRV_SECTOR_SIZE)) { + printf("%" PRId64 " is not a sector-aligned value for 'offset'\n", offset); return 0; } - if (count & 0x1ff) { - printf("count %"PRId64" is not sector aligned\n", + if (!QEMU_IS_ALIGNED(count, BDRV_SECTOR_SIZE)) { + printf("%"PRId64" is not a sector-aligned value for 'count'\n", count); return 0; } @@ -XXX,XX +XXX,XX @@ static int alloc_f(BlockBackend *blk, int argc, char **argv) if (offset < 0) { print_cvtnum_err(offset, argv[1]); return 0; - } else if (offset & 0x1ff) { - printf("offset %" PRId64 " is not sector aligned\n", + } else if (!QEMU_IS_ALIGNED(offset, BDRV_SECTOR_SIZE)) { + printf("%" PRId64 " is not a sector-aligned value for 'offset'\n", offset); return 0; } -- 1.8.3.1 From: Eric Blake <eblake@redhat.com> For the 'alloc' command, accepting an offset in bytes but a length in sectors, and reporting output in sectors, is confusing. Do everything in bytes, and adjust the expected output accordingly. Signed-off-by: Eric Blake <eblake@redhat.com> Message-id: 20170429191419.30051-3-eblake@redhat.com Reviewed-by: Max Reitz <mreitz@redhat.com> Signed-off-by: Max Reitz <mreitz@redhat.com> --- qemu-io-cmds.c | 30 ++++++++++++++++++------------ tests/qemu-iotests/019.out | 8 ++++---- tests/qemu-iotests/common.pattern | 2 +- 3 files changed, 23 insertions(+), 17 deletions(-) diff --git a/qemu-io-cmds.c b/qemu-io-cmds.c index XXXXXXX..XXXXXXX 100644 --- a/qemu-io-cmds.c +++ b/qemu-io-cmds.c @@ -XXX,XX +XXX,XX @@ out: static int alloc_f(BlockBackend *blk, int argc, char **argv) { BlockDriverState *bs = blk_bs(blk); - int64_t offset, sector_num, nb_sectors, remaining; + int64_t offset, sector_num, nb_sectors, remaining, count; char s1[64]; int num, ret; int64_t sum_alloc; @@ -XXX,XX +XXX,XX @@ static int alloc_f(BlockBackend *blk, int argc, char **argv) } if (argc == 3) { - nb_sectors = cvtnum(argv[2]); - if (nb_sectors < 0) { - print_cvtnum_err(nb_sectors, argv[2]); + count = cvtnum(argv[2]); + if (count < 0) { + print_cvtnum_err(count, argv[2]); return 0; - } else if (nb_sectors > INT_MAX) { - printf("length argument cannot exceed %d, given %s\n", - INT_MAX, argv[2]); + } else if (count > INT_MAX * BDRV_SECTOR_SIZE) { + printf("length argument cannot exceed %llu, given %s\n", + INT_MAX * BDRV_SECTOR_SIZE, argv[2]); return 0; } } else { - nb_sectors = 1; + count = BDRV_SECTOR_SIZE; + } + if (!QEMU_IS_ALIGNED(count, BDRV_SECTOR_SIZE)) { + printf("%" PRId64 " is not a sector-aligned value for 'count'\n", + count); + return 0; } + nb_sectors = count >> BDRV_SECTOR_BITS; remaining = nb_sectors; sum_alloc = 0; @@ -XXX,XX +XXX,XX @@ static int alloc_f(BlockBackend *blk, int argc, char **argv) cvtstr(offset, s1, sizeof(s1)); - printf("%"PRId64"/%"PRId64" sectors allocated at offset %s\n", - sum_alloc, nb_sectors, s1); + printf("%"PRId64"/%"PRId64" bytes allocated at offset %s\n", + sum_alloc << BDRV_SECTOR_BITS, nb_sectors << BDRV_SECTOR_BITS, s1); return 0; } @@ -XXX,XX +XXX,XX @@ static const cmdinfo_t alloc_cmd = { .argmin = 1, .argmax = 2, .cfunc = alloc_f, - .args = "off [sectors]", - .oneline = "checks if a sector is present in the file", + .args = "offset [count]", + .oneline = "checks if offset is allocated in the file", }; diff --git a/tests/qemu-iotests/019.out b/tests/qemu-iotests/019.out index XXXXXXX..XXXXXXX 100644 --- a/tests/qemu-iotests/019.out +++ b/tests/qemu-iotests/019.out @@ -XXX,XX +XXX,XX @@ Testing conversion with -B TEST_DIR/t.IMGFMT.base Checking if backing clusters are allocated when they shouldn't -0/128 sectors allocated at offset 1 MiB -0/128 sectors allocated at offset 4.001 GiB +0/65536 bytes allocated at offset 1 MiB +0/65536 bytes allocated at offset 4.001 GiB Reading === IO: pattern 42 @@ -XXX,XX +XXX,XX @@ Testing conversion with -o backing_file=TEST_DIR/t.IMGFMT.base Checking if backing clusters are allocated when they shouldn't -0/128 sectors allocated at offset 1 MiB -0/128 sectors allocated at offset 4.001 GiB +0/65536 bytes allocated at offset 1 MiB +0/65536 bytes allocated at offset 4.001 GiB Reading === IO: pattern 42 diff --git a/tests/qemu-iotests/common.pattern b/tests/qemu-iotests/common.pattern index XXXXXXX..XXXXXXX 100644 --- a/tests/qemu-iotests/common.pattern +++ b/tests/qemu-iotests/common.pattern @@ -XXX,XX +XXX,XX @@ function do_is_allocated() { local start=$1 - local size=$(( $2 / 512)) + local size=$2 local step=$3 local count=$4 -- 1.8.3.1 From: Eric Blake <eblake@redhat.com> Mixing byte offset and sector allocation counts is a bit confusing. Also, reporting n/m sectors, where m decreases according to the remaining size of the file, isn't really adding any useful information; and reporting an offset at both the front and end of the line, with large amounts of whitespace, is pointless. Update the output to use byte counts and shorter lines, then adjust the affected tests (./check -qcow2 102, ./check -vpc 146). Note that 'qemu-io map' is MUCH weaker than 'qemu-img map'; the former only shows which regions of the active layer are allocated, without regards to where the allocation comes from or whether the allocated portion is known to read as zero (because it is using the weaker bdrv_is_allocated()); while the latter (especially in --output=json mode) reports more details from bdrv_get_block_status(). Signed-off-by: Eric Blake <eblake@redhat.com> Message-id: 20170429191419.30051-4-eblake@redhat.com Reviewed-by: Max Reitz <mreitz@redhat.com> Signed-off-by: Max Reitz <mreitz@redhat.com> --- qemu-io-cmds.c | 11 ++++++----- tests/qemu-iotests/102.out | 4 ++-- tests/qemu-iotests/146.out | 30 +++++++++++++++--------------- 3 files changed, 23 insertions(+), 22 deletions(-) diff --git a/qemu-io-cmds.c b/qemu-io-cmds.c index XXXXXXX..XXXXXXX 100644 --- a/qemu-io-cmds.c +++ b/qemu-io-cmds.c @@ -XXX,XX +XXX,XX @@ static int map_f(BlockBackend *blk, int argc, char **argv) { int64_t offset; int64_t nb_sectors, total_sectors; - char s1[64]; + char s1[64], s2[64]; int64_t num; int ret; const char *retstr; @@ -XXX,XX +XXX,XX @@ static int map_f(BlockBackend *blk, int argc, char **argv) } retstr = ret ? " allocated" : "not allocated"; - cvtstr(offset << 9ULL, s1, sizeof(s1)); - printf("[% 24" PRId64 "] % 8" PRId64 "/% 8" PRId64 " sectors %s " - "at offset %s (%d)\n", - offset << 9ULL, num, nb_sectors, retstr, s1, ret); + cvtstr(num << BDRV_SECTOR_BITS, s1, sizeof(s1)); + cvtstr(offset << BDRV_SECTOR_BITS, s2, sizeof(s2)); + printf("%s (0x%" PRIx64 ") bytes %s at offset %s (0x%" PRIx64 ")\n", + s1, num << BDRV_SECTOR_BITS, retstr, + s2, offset << BDRV_SECTOR_BITS); offset += num; nb_sectors -= num; diff --git a/tests/qemu-iotests/102.out b/tests/qemu-iotests/102.out index XXXXXXX..XXXXXXX 100644 --- a/tests/qemu-iotests/102.out +++ b/tests/qemu-iotests/102.out @@ -XXX,XX +XXX,XX @@ Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=65536 wrote 65536/65536 bytes at offset 0 64 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec) Image resized. -[ 0] 128/ 128 sectors allocated at offset 0 bytes (1) +64 KiB (0x10000) bytes allocated at offset 0 bytes (0x0) Offset Length Mapped to File === Testing map on an image file truncated outside of qemu === @@ -XXX,XX +XXX,XX @@ wrote 65536/65536 bytes at offset 0 Image resized. QEMU X.Y.Z monitor - type 'help' for more information (qemu) qemu-io drv0 map -[ 0] 128/ 128 sectors allocated at offset 0 bytes (1) +64 KiB (0x10000) bytes allocated at offset 0 bytes (0x0) *** done diff --git a/tests/qemu-iotests/146.out b/tests/qemu-iotests/146.out index XXXXXXX..XXXXXXX 100644 --- a/tests/qemu-iotests/146.out +++ b/tests/qemu-iotests/146.out @@ -XXX,XX +XXX,XX @@ QA output created by 146 === Testing VPC Autodetect === -[ 0] 266334240/ 266334240 sectors not allocated at offset 0 bytes (0) +126.998 GiB (0x1fbfe04000) bytes not allocated at offset 0 bytes (0x0) === Testing VPC with current_size force === -[ 0] 266338304/ 266338304 sectors not allocated at offset 0 bytes (0) +127 GiB (0x1fc0000000) bytes not allocated at offset 0 bytes (0x0) === Testing VPC with chs force === -[ 0] 266334240/ 266334240 sectors not allocated at offset 0 bytes (0) +126.998 GiB (0x1fbfe04000) bytes not allocated at offset 0 bytes (0x0) === Testing Hyper-V Autodetect === -[ 0] 266338304/ 266338304 sectors not allocated at offset 0 bytes (0) +127 GiB (0x1fc0000000) bytes not allocated at offset 0 bytes (0x0) === Testing Hyper-V with current_size force === -[ 0] 266338304/ 266338304 sectors not allocated at offset 0 bytes (0) +127 GiB (0x1fc0000000) bytes not allocated at offset 0 bytes (0x0) === Testing Hyper-V with chs force === -[ 0] 266334240/ 266334240 sectors not allocated at offset 0 bytes (0) +126.998 GiB (0x1fbfe04000) bytes not allocated at offset 0 bytes (0x0) === Testing d2v Autodetect === -[ 0] 514560/ 514560 sectors allocated at offset 0 bytes (1) +251.250 MiB (0xfb40000) bytes allocated at offset 0 bytes (0x0) === Testing d2v with current_size force === -[ 0] 514560/ 514560 sectors allocated at offset 0 bytes (1) +251.250 MiB (0xfb40000) bytes allocated at offset 0 bytes (0x0) === Testing d2v with chs force === -[ 0] 514560/ 514560 sectors allocated at offset 0 bytes (1) +251.250 MiB (0xfb40000) bytes allocated at offset 0 bytes (0x0) === Testing Image create, default === @@ -XXX,XX +XXX,XX @@ Formatting 'TEST_DIR/IMGFMT-create-test.IMGFMT', fmt=IMGFMT size=4294967296 === Read created image, default opts ==== -[ 0] 8389584/ 8389584 sectors not allocated at offset 0 bytes (0) +4 GiB (0x10007a000) bytes not allocated at offset 0 bytes (0x0) === Read created image, force_size_calc=chs ==== -[ 0] 8389584/ 8389584 sectors not allocated at offset 0 bytes (0) +4 GiB (0x10007a000) bytes not allocated at offset 0 bytes (0x0) === Read created image, force_size_calc=current_size ==== -[ 0] 8389584/ 8389584 sectors not allocated at offset 0 bytes (0) +4 GiB (0x10007a000) bytes not allocated at offset 0 bytes (0x0) === Testing Image create, force_size === @@ -XXX,XX +XXX,XX @@ Formatting 'TEST_DIR/IMGFMT-create-test.IMGFMT', fmt=IMGFMT size=4294967296 forc === Read created image, default opts ==== -[ 0] 8388608/ 8388608 sectors not allocated at offset 0 bytes (0) +4 GiB (0x100000000) bytes not allocated at offset 0 bytes (0x0) === Read created image, force_size_calc=chs ==== -[ 0] 8388608/ 8388608 sectors not allocated at offset 0 bytes (0) +4 GiB (0x100000000) bytes not allocated at offset 0 bytes (0x0) === Read created image, force_size_calc=current_size ==== -[ 0] 8388608/ 8388608 sectors not allocated at offset 0 bytes (0) +4 GiB (0x100000000) bytes not allocated at offset 0 bytes (0x0) *** done -- 1.8.3.1 From: Eric Blake <eblake@redhat.com> Commits 04ed95f4 and 1a62d0ac updated the block layer to auto-fragment any I/O to fit within device boundaries. Additionally, when using a minimum alignment of 4k, we want to ensure the block layer does proper read-modify-write rather than requesting I/O on a slice of a sector. Let's enforce that the contract is obeyed when using blkdebug. For now, blkdebug only allows alignment overrides, and just inherits other limits from whatever device it is wrapping, but a future patch will further enhance things. Signed-off-by: Eric Blake <eblake@redhat.com> Reviewed-by: Kevin Wolf <kwolf@redhat.com> Reviewed-by: Max Reitz <mreitz@redhat.com> Message-id: 20170429191419.30051-5-eblake@redhat.com Signed-off-by: Max Reitz <mreitz@redhat.com> --- block/blkdebug.c | 14 ++++++++++++++ 1 file changed, 14 insertions(+) diff --git a/block/blkdebug.c b/block/blkdebug.c index XXXXXXX..XXXXXXX 100644 --- a/block/blkdebug.c +++ b/block/blkdebug.c @@ -XXX,XX +XXX,XX @@ blkdebug_co_preadv(BlockDriverState *bs, uint64_t offset, uint64_t bytes, BDRVBlkdebugState *s = bs->opaque; BlkdebugRule *rule = NULL; + /* Sanity check block layer guarantees */ + assert(QEMU_IS_ALIGNED(offset, bs->bl.request_alignment)); + assert(QEMU_IS_ALIGNED(bytes, bs->bl.request_alignment)); + if (bs->bl.max_transfer) { + assert(bytes <= bs->bl.max_transfer); + } + QSIMPLEQ_FOREACH(rule, &s->active_rules, active_next) { uint64_t inject_offset = rule->options.inject.offset; @@ -XXX,XX +XXX,XX @@ blkdebug_co_pwritev(BlockDriverState *bs, uint64_t offset, uint64_t bytes, BDRVBlkdebugState *s = bs->opaque; BlkdebugRule *rule = NULL; + /* Sanity check block layer guarantees */ + assert(QEMU_IS_ALIGNED(offset, bs->bl.request_alignment)); + assert(QEMU_IS_ALIGNED(bytes, bs->bl.request_alignment)); + if (bs->bl.max_transfer) { + assert(bytes <= bs->bl.max_transfer); + } + QSIMPLEQ_FOREACH(rule, &s->active_rules, active_next) { uint64_t inject_offset = rule->options.inject.offset; -- 1.8.3.1 From: Eric Blake <eblake@redhat.com> Rather than repeat the logic at each caller of checking if a Rule exists that warrants an error injection, fold that logic into inject_error(); and rename it to rule_check() for legibility. This will help the next patch, which adds two more callers that need to check rules for the potential of injecting errors. Signed-off-by: Eric Blake <eblake@redhat.com> Reviewed-by: Max Reitz <mreitz@redhat.com> Message-id: 20170429191419.30051-6-eblake@redhat.com Signed-off-by: Max Reitz <mreitz@redhat.com> --- block/blkdebug.c | 74 +++++++++++++++++++++++++------------------------------- 1 file changed, 33 insertions(+), 41 deletions(-) diff --git a/block/blkdebug.c b/block/blkdebug.c index XXXXXXX..XXXXXXX 100644 --- a/block/blkdebug.c +++ b/block/blkdebug.c @@ -XXX,XX +XXX,XX @@ out: return ret; } -static int inject_error(BlockDriverState *bs, BlkdebugRule *rule) +static int rule_check(BlockDriverState *bs, uint64_t offset, uint64_t bytes) { BDRVBlkdebugState *s = bs->opaque; - int error = rule->options.inject.error; - bool immediately = rule->options.inject.immediately; + BlkdebugRule *rule = NULL; + int error; + bool immediately; + + QSIMPLEQ_FOREACH(rule, &s->active_rules, active_next) { + uint64_t inject_offset = rule->options.inject.offset; + + if (inject_offset == -1 || + (bytes && inject_offset >= offset && + inject_offset < offset + bytes)) + { + break; + } + } + + if (!rule || !rule->options.inject.error) { + return 0; + } + + immediately = rule->options.inject.immediately; + error = rule->options.inject.error; if (rule->options.inject.once) { QSIMPLEQ_REMOVE(&s->active_rules, rule, BlkdebugRule, active_next); @@ -XXX,XX +XXX,XX @@ static int coroutine_fn blkdebug_co_preadv(BlockDriverState *bs, uint64_t offset, uint64_t bytes, QEMUIOVector *qiov, int flags) { - BDRVBlkdebugState *s = bs->opaque; - BlkdebugRule *rule = NULL; + int err; /* Sanity check block layer guarantees */ assert(QEMU_IS_ALIGNED(offset, bs->bl.request_alignment)); @@ -XXX,XX +XXX,XX @@ blkdebug_co_preadv(BlockDriverState *bs, uint64_t offset, uint64_t bytes, assert(bytes <= bs->bl.max_transfer); } - QSIMPLEQ_FOREACH(rule, &s->active_rules, active_next) { - uint64_t inject_offset = rule->options.inject.offset; - - if (inject_offset == -1 || - (inject_offset >= offset && inject_offset < offset + bytes)) - { - break; - } - } - - if (rule && rule->options.inject.error) { - return inject_error(bs, rule); + err = rule_check(bs, offset, bytes); + if (err) { + return err; } return bdrv_co_preadv(bs->file, offset, bytes, qiov, flags); @@ -XXX,XX +XXX,XX @@ static int coroutine_fn blkdebug_co_pwritev(BlockDriverState *bs, uint64_t offset, uint64_t bytes, QEMUIOVector *qiov, int flags) { - BDRVBlkdebugState *s = bs->opaque; - BlkdebugRule *rule = NULL; + int err; /* Sanity check block layer guarantees */ assert(QEMU_IS_ALIGNED(offset, bs->bl.request_alignment)); @@ -XXX,XX +XXX,XX @@ blkdebug_co_pwritev(BlockDriverState *bs, uint64_t offset, uint64_t bytes, assert(bytes <= bs->bl.max_transfer); } - QSIMPLEQ_FOREACH(rule, &s->active_rules, active_next) { - uint64_t inject_offset = rule->options.inject.offset; - - if (inject_offset == -1 || - (inject_offset >= offset && inject_offset < offset + bytes)) - { - break; - } - } - - if (rule && rule->options.inject.error) { - return inject_error(bs, rule); + err = rule_check(bs, offset, bytes); + if (err) { + return err; } return bdrv_co_pwritev(bs->file, offset, bytes, qiov, flags); @@ -XXX,XX +XXX,XX @@ blkdebug_co_pwritev(BlockDriverState *bs, uint64_t offset, uint64_t bytes, static int blkdebug_co_flush(BlockDriverState *bs) { - BDRVBlkdebugState *s = bs->opaque; - BlkdebugRule *rule = NULL; - - QSIMPLEQ_FOREACH(rule, &s->active_rules, active_next) { - if (rule->options.inject.offset == -1) { - break; - } - } + int err = rule_check(bs, 0, 0); - if (rule && rule->options.inject.error) { - return inject_error(bs, rule); + if (err) { + return err; } return bdrv_co_flush(bs->file->bs); -- 1.8.3.1 From: Eric Blake <eblake@redhat.com> In order to test the effects of artificial geometry constraints on operations like write zero or discard, we first need blkdebug to manage these actions. It also allows us to inject errors on those operations, just like we can for read/write/flush. We can also test the contract promised by the block layer; namely, if a device has specified limits on alignment or maximum size, then those limits must be obeyed (for now, the blkdebug driver merely inherits limits from whatever it is wrapping, but the next patch will further enhance it to allow specific limit overrides). This patch intentionally refuses to service requests smaller than the requested alignments; this is because an upcoming patch adds a qemu-iotest to prove that the block layer is correctly handling fragmentation, but the test only works if there is a way to tell the difference at artificial alignment boundaries when blkdebug is using a larger-than-default alignment. If we let the blkdebug layer always defer to the underlying layer, which potentially has a smaller granularity, the iotest will be thwarted. Tested by setting up an NBD server with export 'foo', then invoking: $ ./qemu-io qemu-io> open -o driver=blkdebug blkdebug::nbd://localhost:10809/foo qemu-io> d 0 15M qemu-io> w -z 0 15M Pre-patch, the server never sees the discard (it was silently eaten by the block layer); post-patch it is passed across the wire. Likewise, pre-patch the write is always passed with NBD_WRITE (with 15M of zeroes on the wire), while post-patch it can utilize NBD_WRITE_ZEROES (for less traffic). Signed-off-by: Eric Blake <eblake@redhat.com> Reviewed-by: Max Reitz <mreitz@redhat.com> Message-id: 20170429191419.30051-7-eblake@redhat.com Signed-off-by: Max Reitz <mreitz@redhat.com> --- block/blkdebug.c | 74 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 74 insertions(+) diff --git a/block/blkdebug.c b/block/blkdebug.c index XXXXXXX..XXXXXXX 100644 --- a/block/blkdebug.c +++ b/block/blkdebug.c @@ -XXX,XX +XXX,XX @@ /* * Block protocol for I/O error injection * + * Copyright (C) 2016-2017 Red Hat, Inc. * Copyright (c) 2010 Kevin Wolf <kwolf@redhat.com> * * Permission is hereby granted, free of charge, to any person obtaining a copy @@ -XXX,XX +XXX,XX @@ static int blkdebug_open(BlockDriverState *bs, QDict *options, int flags, goto out; } + bs->supported_write_flags = BDRV_REQ_FUA & + bs->file->bs->supported_write_flags; + bs->supported_zero_flags = (BDRV_REQ_FUA | BDRV_REQ_MAY_UNMAP) & + bs->file->bs->supported_zero_flags; + /* Set request alignment */ align = qemu_opt_get_size(opts, "align", 0); if (align < INT_MAX && is_power_of_2(align)) { @@ -XXX,XX +XXX,XX @@ static int blkdebug_co_flush(BlockDriverState *bs) return bdrv_co_flush(bs->file->bs); } +static int coroutine_fn blkdebug_co_pwrite_zeroes(BlockDriverState *bs, + int64_t offset, int count, + BdrvRequestFlags flags) +{ + uint32_t align = MAX(bs->bl.request_alignment, + bs->bl.pwrite_zeroes_alignment); + int err; + + /* Only pass through requests that are larger than requested + * preferred alignment (so that we test the fallback to writes on + * unaligned portions), and check that the block layer never hands + * us anything unaligned that crosses an alignment boundary. */ + if (count < align) { + assert(QEMU_IS_ALIGNED(offset, align) || + QEMU_IS_ALIGNED(offset + count, align) || + DIV_ROUND_UP(offset, align) == + DIV_ROUND_UP(offset + count, align)); + return -ENOTSUP; + } + assert(QEMU_IS_ALIGNED(offset, align)); + assert(QEMU_IS_ALIGNED(count, align)); + if (bs->bl.max_pwrite_zeroes) { + assert(count <= bs->bl.max_pwrite_zeroes); + } + + err = rule_check(bs, offset, count); + if (err) { + return err; + } + + return bdrv_co_pwrite_zeroes(bs->file, offset, count, flags); +} + +static int coroutine_fn blkdebug_co_pdiscard(BlockDriverState *bs, + int64_t offset, int count) +{ + uint32_t align = bs->bl.pdiscard_alignment; + int err; + + /* Only pass through requests that are larger than requested + * minimum alignment, and ensure that unaligned requests do not + * cross optimum discard boundaries. */ + if (count < bs->bl.request_alignment) { + assert(QEMU_IS_ALIGNED(offset, align) || + QEMU_IS_ALIGNED(offset + count, align) || + DIV_ROUND_UP(offset, align) == + DIV_ROUND_UP(offset + count, align)); + return -ENOTSUP; + } + assert(QEMU_IS_ALIGNED(offset, bs->bl.request_alignment)); + assert(QEMU_IS_ALIGNED(count, bs->bl.request_alignment)); + if (align && count >= align) { + assert(QEMU_IS_ALIGNED(offset, align)); + assert(QEMU_IS_ALIGNED(count, align)); + } + if (bs->bl.max_pdiscard) { + assert(count <= bs->bl.max_pdiscard); + } + + err = rule_check(bs, offset, count); + if (err) { + return err; + } + + return bdrv_co_pdiscard(bs->file->bs, offset, count); +} static void blkdebug_close(BlockDriverState *bs) { @@ -XXX,XX +XXX,XX @@ static BlockDriver bdrv_blkdebug = { .bdrv_co_preadv = blkdebug_co_preadv, .bdrv_co_pwritev = blkdebug_co_pwritev, .bdrv_co_flush_to_disk = blkdebug_co_flush, + .bdrv_co_pwrite_zeroes = blkdebug_co_pwrite_zeroes, + .bdrv_co_pdiscard = blkdebug_co_pdiscard, .bdrv_debug_event = blkdebug_debug_event, .bdrv_debug_breakpoint = blkdebug_debug_breakpoint, -- 1.8.3.1 From: Eric Blake <eblake@redhat.com> Rather than store into a local variable, then copy to the struct if the value is valid, then reporting errors otherwise, it is simpler to just store into the struct and report errors if the value is invalid. This however requires that the struct store a 64-bit number, rather than a narrower type. Likewise, setting a sane errno value in ret prior to the sequence of parsing and jumping to out: on error makes it easier for the next patch to add a chain of similar checks. Signed-off-by: Eric Blake <eblake@redhat.com> Message-id: 20170429191419.30051-8-eblake@redhat.com Reviewed-by: Max Reitz <mreitz@redhat.com> Signed-off-by: Max Reitz <mreitz@redhat.com> --- block/blkdebug.c | 16 ++++++---------- 1 file changed, 6 insertions(+), 10 deletions(-) diff --git a/block/blkdebug.c b/block/blkdebug.c index XXXXXXX..XXXXXXX 100644 --- a/block/blkdebug.c +++ b/block/blkdebug.c @@ -XXX,XX +XXX,XX @@ typedef struct BDRVBlkdebugState { int state; int new_state; - int align; + uint64_t align; /* For blkdebug_refresh_filename() */ char *config_file; @@ -XXX,XX +XXX,XX @@ static int blkdebug_open(BlockDriverState *bs, QDict *options, int flags, BDRVBlkdebugState *s = bs->opaque; QemuOpts *opts; Error *local_err = NULL; - uint64_t align; int ret; opts = qemu_opts_create(&runtime_opts, NULL, 0, &error_abort); @@ -XXX,XX +XXX,XX @@ static int blkdebug_open(BlockDriverState *bs, QDict *options, int flags, bs->file->bs->supported_write_flags; bs->supported_zero_flags = (BDRV_REQ_FUA | BDRV_REQ_MAY_UNMAP) & bs->file->bs->supported_zero_flags; + ret = -EINVAL; /* Set request alignment */ - align = qemu_opt_get_size(opts, "align", 0); - if (align < INT_MAX && is_power_of_2(align)) { - s->align = align; - } else if (align) { - error_setg(errp, "Invalid alignment"); - ret = -EINVAL; + s->align = qemu_opt_get_size(opts, "align", 0); + if (s->align && (s->align >= INT_MAX || !is_power_of_2(s->align))) { + error_setg(errp, "Cannot meet constraints with align %" PRIu64, + s->align); goto out; } ret = 0; - goto out; - out: if (ret < 0) { g_free(s->config_file); -- 1.8.3.1 From: Eric Blake <eblake@redhat.com> Make it easier to simulate various unusual hardware setups (for example, recent commits 3482b9b and b8d0a98 affect the Dell Equallogic iSCSI with its 15M preferred and maximum unmap and write zero sizing, or b2f95fe deals with the Linux loopback block device having a max_transfer of 64k), by allowing blkdebug to wrap any other device with further restrictions on various alignments. Signed-off-by: Eric Blake <eblake@redhat.com> Reviewed-by: Max Reitz <mreitz@redhat.com> Message-id: 20170429191419.30051-9-eblake@redhat.com Signed-off-by: Max Reitz <mreitz@redhat.com> --- block/blkdebug.c | 96 +++++++++++++++++++++++++++++++++++++++++++++++++++- qapi/block-core.json | 33 ++++++++++++++++-- 2 files changed, 125 insertions(+), 4 deletions(-) diff --git a/block/blkdebug.c b/block/blkdebug.c index XXXXXXX..XXXXXXX 100644 --- a/block/blkdebug.c +++ b/block/blkdebug.c @@ -XXX,XX +XXX,XX @@ typedef struct BDRVBlkdebugState { int state; int new_state; uint64_t align; + uint64_t max_transfer; + uint64_t opt_write_zero; + uint64_t max_write_zero; + uint64_t opt_discard; + uint64_t max_discard; /* For blkdebug_refresh_filename() */ char *config_file; @@ -XXX,XX +XXX,XX @@ static QemuOptsList runtime_opts = { .type = QEMU_OPT_SIZE, .help = "Required alignment in bytes", }, + { + .name = "max-transfer", + .type = QEMU_OPT_SIZE, + .help = "Maximum transfer size in bytes", + }, + { + .name = "opt-write-zero", + .type = QEMU_OPT_SIZE, + .help = "Optimum write zero alignment in bytes", + }, + { + .name = "max-write-zero", + .type = QEMU_OPT_SIZE, + .help = "Maximum write zero size in bytes", + }, + { + .name = "opt-discard", + .type = QEMU_OPT_SIZE, + .help = "Optimum discard alignment in bytes", + }, + { + .name = "max-discard", + .type = QEMU_OPT_SIZE, + .help = "Maximum discard size in bytes", + }, { /* end of list */ } }, }; @@ -XXX,XX +XXX,XX @@ static int blkdebug_open(BlockDriverState *bs, QDict *options, int flags, QemuOpts *opts; Error *local_err = NULL; int ret; + uint64_t align; opts = qemu_opts_create(&runtime_opts, NULL, 0, &error_abort); qemu_opts_absorb_qdict(opts, options, &local_err); @@ -XXX,XX +XXX,XX @@ static int blkdebug_open(BlockDriverState *bs, QDict *options, int flags, bs->file->bs->supported_zero_flags; ret = -EINVAL; - /* Set request alignment */ + /* Set alignment overrides */ s->align = qemu_opt_get_size(opts, "align", 0); if (s->align && (s->align >= INT_MAX || !is_power_of_2(s->align))) { error_setg(errp, "Cannot meet constraints with align %" PRIu64, s->align); goto out; } + align = MAX(s->align, bs->file->bs->bl.request_alignment); + + s->max_transfer = qemu_opt_get_size(opts, "max-transfer", 0); + if (s->max_transfer && + (s->max_transfer >= INT_MAX || + !QEMU_IS_ALIGNED(s->max_transfer, align))) { + error_setg(errp, "Cannot meet constraints with max-transfer %" PRIu64, + s->max_transfer); + goto out; + } + + s->opt_write_zero = qemu_opt_get_size(opts, "opt-write-zero", 0); + if (s->opt_write_zero && + (s->opt_write_zero >= INT_MAX || + !QEMU_IS_ALIGNED(s->opt_write_zero, align))) { + error_setg(errp, "Cannot meet constraints with opt-write-zero %" PRIu64, + s->opt_write_zero); + goto out; + } + + s->max_write_zero = qemu_opt_get_size(opts, "max-write-zero", 0); + if (s->max_write_zero && + (s->max_write_zero >= INT_MAX || + !QEMU_IS_ALIGNED(s->max_write_zero, + MAX(s->opt_write_zero, align)))) { + error_setg(errp, "Cannot meet constraints with max-write-zero %" PRIu64, + s->max_write_zero); + goto out; + } + + s->opt_discard = qemu_opt_get_size(opts, "opt-discard", 0); + if (s->opt_discard && + (s->opt_discard >= INT_MAX || + !QEMU_IS_ALIGNED(s->opt_discard, align))) { + error_setg(errp, "Cannot meet constraints with opt-discard %" PRIu64, + s->opt_discard); + goto out; + } + + s->max_discard = qemu_opt_get_size(opts, "max-discard", 0); + if (s->max_discard && + (s->max_discard >= INT_MAX || + !QEMU_IS_ALIGNED(s->max_discard, + MAX(s->opt_discard, align)))) { + error_setg(errp, "Cannot meet constraints with max-discard %" PRIu64, + s->max_discard); + goto out; + } ret = 0; out: @@ -XXX,XX +XXX,XX @@ static void blkdebug_refresh_limits(BlockDriverState *bs, Error **errp) if (s->align) { bs->bl.request_alignment = s->align; } + if (s->max_transfer) { + bs->bl.max_transfer = s->max_transfer; + } + if (s->opt_write_zero) { + bs->bl.pwrite_zeroes_alignment = s->opt_write_zero; + } + if (s->max_write_zero) { + bs->bl.max_pwrite_zeroes = s->max_write_zero; + } + if (s->opt_discard) { + bs->bl.pdiscard_alignment = s->opt_discard; + } + if (s->max_discard) { + bs->bl.max_pdiscard = s->max_discard; + } } static int blkdebug_reopen_prepare(BDRVReopenState *reopen_state, diff --git a/qapi/block-core.json b/qapi/block-core.json index XXXXXXX..XXXXXXX 100644 --- a/qapi/block-core.json +++ b/qapi/block-core.json @@ -XXX,XX +XXX,XX @@ # # @config: filename of the configuration file # -# @align: required alignment for requests in bytes, -# must be power of 2, or 0 for default +# @align: required alignment for requests in bytes, must be +# positive power of 2, or 0 for default +# +# @max-transfer: maximum size for I/O transfers in bytes, must be +# positive multiple of @align and of the underlying +# file's request alignment (but need not be a power of +# 2), or 0 for default (since 2.10) +# +# @opt-write-zero: preferred alignment for write zero requests in bytes, +# must be positive multiple of @align and of the +# underlying file's request alignment (but need not be a +# power of 2), or 0 for default (since 2.10) +# +# @max-write-zero: maximum size for write zero requests in bytes, must be +# positive multiple of @align, of @opt-write-zero, and of +# the underlying file's request alignment (but need not +# be a power of 2), or 0 for default (since 2.10) +# +# @opt-discard: preferred alignment for discard requests in bytes, must +# be positive multiple of @align and of the underlying +# file's request alignment (but need not be a power of +# 2), or 0 for default (since 2.10) +# +# @max-discard: maximum size for discard requests in bytes, must be +# positive multiple of @align, of @opt-discard, and of +# the underlying file's request alignment (but need not +# be a power of 2), or 0 for default (since 2.10) # # @inject-error: array of error injection descriptions # @@ -XXX,XX +XXX,XX @@ { 'struct': 'BlockdevOptionsBlkdebug', 'data': { 'image': 'BlockdevRef', '*config': 'str', - '*align': 'int', + '*align': 'int', '*max-transfer': 'int32', + '*opt-write-zero': 'int32', '*max-write-zero': 'int32', + '*opt-discard': 'int32', '*max-discard': 'int32', '*inject-error': ['BlkdebugInjectErrorOptions'], '*set-state': ['BlkdebugSetStateOptions'] } } -- 1.8.3.1 From: Eric Blake <eblake@redhat.com> Use blkdebug's new geometry constraints to emulate setups that have needed past regression fixes: write zeroes asserting when running through a loopback block device with max-transfer smaller than cluster size, and discard rounding away portions of requests not aligned to preferred boundaries. Also, add coverage that the block layer is honoring max transfer limits. For now, a single iotest performs all actions, with the idea that we can add future blkdebug constraint test cases in the same file; but it can be split into multiple iotests if we find reason to run one portion of the test in more setups than what are possible in the other. For reference, the final portion of the test (checking whether discard passes as much as possible to the lowest layers of the stack) works as follows: qemu-io: discard 30M at 80000001, passed to blkdebug blkdebug: discard 511 bytes at 80000001, -ENOTSUP (smaller than blkdebug's 512 align) blkdebug: discard 14371328 bytes at 80000512, passed to qcow2 qcow2: discard 739840 bytes at 80000512, -ENOTSUP (smaller than qcow2's 1M align) qcow2: discard 13M bytes at 77M, succeeds blkdebug: discard 15M bytes at 90M, passed to qcow2 qcow2: discard 15M bytes at 90M, succeeds blkdebug: discard 1356800 bytes at 105M, passed to qcow2 qcow2: discard 1M at 105M, succeeds qcow2: discard 308224 bytes at 106M, -ENOTSUP (smaller than qcow2's 1M align) blkdebug: discard 1 byte at 111457280, -ENOTSUP (smaller than blkdebug's 512 align) Signed-off-by: Eric Blake <eblake@redhat.com> Reviewed-by: Max Reitz <mreitz@redhat.com> Message-id: 20170429191419.30051-10-eblake@redhat.com [mreitz: For cooperation with image locking, add -r to the qemu-io invocation which verifies the image content] Signed-off-by: Max Reitz <mreitz@redhat.com> --- tests/qemu-iotests/177 | 114 +++++++++++++++++++++++++++++++++++++++++++++ tests/qemu-iotests/177.out | 49 +++++++++++++++++++ tests/qemu-iotests/group | 1 + 3 files changed, 164 insertions(+) create mode 100755 tests/qemu-iotests/177 create mode 100644 tests/qemu-iotests/177.out diff --git a/tests/qemu-iotests/177 b/tests/qemu-iotests/177 new file mode 100755 index XXXXXXX..XXXXXXX --- /dev/null +++ b/tests/qemu-iotests/177 @@ -XXX,XX +XXX,XX @@ +#!/bin/bash +# +# Test corner cases with unusual block geometries +# +# Copyright (C) 2016-2017 Red Hat, Inc. +# +# This program is free software; you can redistribute it and/or modify +# it under the terms of the GNU General Public License as published by +# the Free Software Foundation; either version 2 of the License, or +# (at your option) any later version. +# +# This program is distributed in the hope that it will be useful, +# but WITHOUT ANY WARRANTY; without even the implied warranty of +# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +# GNU General Public License for more details. +# +# You should have received a copy of the GNU General Public License +# along with this program. If not, see <http://www.gnu.org/licenses/>. +# + +# creator +owner=eblake@redhat.com + +seq=`basename $0` +echo "QA output created by $seq" + +here=`pwd` +status=1 # failure is the default! + +_cleanup() +{ + _cleanup_test_img +} +trap "_cleanup; exit \$status" 0 1 2 3 15 + +# get standard environment, filters and checks +. ./common.rc +. ./common.filter + +_supported_fmt qcow2 +_supported_proto file + +CLUSTER_SIZE=1M +size=128M +options=driver=blkdebug,image.driver=qcow2 + +echo +echo "== setting up files ==" + +TEST_IMG="$TEST_IMG.base" _make_test_img $size +$QEMU_IO -c "write -P 11 0 $size" "$TEST_IMG.base" | _filter_qemu_io +_make_test_img -b "$TEST_IMG.base" +$QEMU_IO -c "write -P 22 0 $size" "$TEST_IMG" | _filter_qemu_io + +# Limited to 64k max-transfer +echo +echo "== constrained alignment and max-transfer ==" +limits=align=4k,max-transfer=64k +$QEMU_IO -c "open -o $options,$limits blkdebug::$TEST_IMG" \ + -c "write -P 33 1000 128k" -c "read -P 33 1000 128k" | _filter_qemu_io + +echo +echo "== write zero with constrained max-transfer ==" +limits=align=512,max-transfer=64k,opt-write-zero=$CLUSTER_SIZE +$QEMU_IO -c "open -o $options,$limits blkdebug::$TEST_IMG" \ + -c "write -z 8003584 2093056" | _filter_qemu_io + +# non-power-of-2 write-zero/discard alignments +echo +echo "== non-power-of-2 write zeroes limits ==" + +limits=align=512,opt-write-zero=15M,max-write-zero=15M,opt-discard=15M,max-discard=15M +$QEMU_IO -c "open -o $options,$limits blkdebug::$TEST_IMG" \ + -c "write -z 32M 32M" | _filter_qemu_io + +echo +echo "== non-power-of-2 discard limits ==" + +limits=align=512,opt-write-zero=15M,max-write-zero=15M,opt-discard=15M,max-discard=15M +$QEMU_IO -c "open -o $options,$limits blkdebug::$TEST_IMG" \ + -c "discard 80000001 30M" | _filter_qemu_io + +echo +echo "== verify image content ==" + +function verify_io() +{ + if ($QEMU_IMG info -f "$IMGFMT" "$TEST_IMG" | + grep "compat: 0.10" > /dev/null); then + # For v2 images, discarded clusters are read from the backing file + discarded=11 + else + # Discarded clusters are zeroed for v3 or later + discarded=0 + fi + + echo read -P 22 0 1000 + echo read -P 33 1000 128k + echo read -P 22 132072 7871512 + echo read -P 0 8003584 2093056 + echo read -P 22 10096640 23457792 + echo read -P 0 32M 32M + echo read -P 22 64M 13M + echo read -P $discarded 77M 29M + echo read -P 22 106M 22M +} + +verify_io | $QEMU_IO -r "$TEST_IMG" | _filter_qemu_io + +_check_test_img + +# success, all done +echo "*** done" +status=0 diff --git a/tests/qemu-iotests/177.out b/tests/qemu-iotests/177.out new file mode 100644 index XXXXXXX..XXXXXXX --- /dev/null +++ b/tests/qemu-iotests/177.out @@ -XXX,XX +XXX,XX @@ +QA output created by 177 + +== setting up files == +Formatting 'TEST_DIR/t.IMGFMT.base', fmt=IMGFMT size=134217728 +wrote 134217728/134217728 bytes at offset 0 +128 MiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec) +Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=134217728 backing_file=TEST_DIR/t.IMGFMT.base +wrote 134217728/134217728 bytes at offset 0 +128 MiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec) + +== constrained alignment and max-transfer == +wrote 131072/131072 bytes at offset 1000 +128 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec) +read 131072/131072 bytes at offset 1000 +128 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec) + +== write zero with constrained max-transfer == +wrote 2093056/2093056 bytes at offset 8003584 +1.996 MiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec) + +== non-power-of-2 write zeroes limits == +wrote 33554432/33554432 bytes at offset 33554432 +32 MiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec) + +== non-power-of-2 discard limits == +discard 31457280/31457280 bytes at offset 80000001 +30 MiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec) + +== verify image content == +read 1000/1000 bytes at offset 0 +1000 bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec) +read 131072/131072 bytes at offset 1000 +128 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec) +read 7871512/7871512 bytes at offset 132072 +7.507 MiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec) +read 2093056/2093056 bytes at offset 8003584 +1.996 MiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec) +read 23457792/23457792 bytes at offset 10096640 +22.371 MiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec) +read 33554432/33554432 bytes at offset 33554432 +32 MiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec) +read 13631488/13631488 bytes at offset 67108864 +13 MiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec) +read 30408704/30408704 bytes at offset 80740352 +29 MiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec) +read 23068672/23068672 bytes at offset 111149056 +22 MiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec) +No errors were found on the image. +*** done diff --git a/tests/qemu-iotests/group b/tests/qemu-iotests/group index XXXXXXX..XXXXXXX 100644 --- a/tests/qemu-iotests/group +++ b/tests/qemu-iotests/group @@ -XXX,XX +XXX,XX @@ 174 auto 175 auto quick 176 rw auto backing +177 rw auto quick 181 rw auto migration 182 rw auto quick -- 1.8.3.1 From: Eric Blake <eblake@redhat.com> In order to keep checkpatch happy when the next patch changes indentation, we first have to shorten some long lines. The easiest approach is to use a new variable in place of 'offset & L2E_OFFSET_MASK', except that 'offset' is the best name for that variable. Change '[old_]offset' to '[old_]entry' to make room. While touching things, also fix checkpatch warnings about unusual 'for' statements. Suggested by Max Reitz <mreitz@redhat.com> Signed-off-by: Eric Blake <eblake@redhat.com> Message-id: 20170507000552.20847-2-eblake@redhat.com Reviewed-by: Max Reitz <mreitz@redhat.com> Signed-off-by: Max Reitz <mreitz@redhat.com> --- block/qcow2-refcount.c | 42 ++++++++++++++++++++++-------------------- 1 file changed, 22 insertions(+), 20 deletions(-) diff --git a/block/qcow2-refcount.c b/block/qcow2-refcount.c index XXXXXXX..XXXXXXX 100644 --- a/block/qcow2-refcount.c +++ b/block/qcow2-refcount.c @@ -XXX,XX +XXX,XX @@ int qcow2_update_snapshot_refcount(BlockDriverState *bs, int64_t l1_table_offset, int l1_size, int addend) { BDRVQcow2State *s = bs->opaque; - uint64_t *l1_table, *l2_table, l2_offset, offset, l1_size2, refcount; + uint64_t *l1_table, *l2_table, l2_offset, entry, l1_size2, refcount; bool l1_allocated = false; - int64_t old_offset, old_l2_offset; + int64_t old_entry, old_l2_offset; int i, j, l1_modified = 0, nb_csectors; int ret; @@ -XXX,XX +XXX,XX @@ int qcow2_update_snapshot_refcount(BlockDriverState *bs, goto fail; } - for(i = 0;i < l1_size; i++) + for (i = 0; i < l1_size; i++) { be64_to_cpus(&l1_table[i]); + } } else { assert(l1_size == s->l1_size); l1_table = s->l1_table; l1_allocated = false; } - for(i = 0; i < l1_size; i++) { + for (i = 0; i < l1_size; i++) { l2_offset = l1_table[i]; if (l2_offset) { old_l2_offset = l2_offset; @@ -XXX,XX +XXX,XX @@ int qcow2_update_snapshot_refcount(BlockDriverState *bs, goto fail; } - for(j = 0; j < s->l2_size; j++) { + for (j = 0; j < s->l2_size; j++) { uint64_t cluster_index; + uint64_t offset; - offset = be64_to_cpu(l2_table[j]); - old_offset = offset; - offset &= ~QCOW_OFLAG_COPIED; + entry = be64_to_cpu(l2_table[j]); + old_entry = entry; + entry &= ~QCOW_OFLAG_COPIED; + offset = entry & L2E_OFFSET_MASK; - switch (qcow2_get_cluster_type(offset)) { + switch (qcow2_get_cluster_type(entry)) { case QCOW2_CLUSTER_COMPRESSED: - nb_csectors = ((offset >> s->csize_shift) & + nb_csectors = ((entry >> s->csize_shift) & s->csize_mask) + 1; if (addend != 0) { ret = update_refcount(bs, - (offset & s->cluster_offset_mask) & ~511, + (entry & s->cluster_offset_mask) & ~511, nb_csectors * 512, abs(addend), addend < 0, QCOW2_DISCARD_SNAPSHOT); if (ret < 0) { @@ -XXX,XX +XXX,XX @@ int qcow2_update_snapshot_refcount(BlockDriverState *bs, case QCOW2_CLUSTER_NORMAL: case QCOW2_CLUSTER_ZERO: - if (offset_into_cluster(s, offset & L2E_OFFSET_MASK)) { + if (offset_into_cluster(s, offset)) { qcow2_signal_corruption(bs, true, -1, -1, "Data " - "cluster offset %#llx " - "unaligned (L2 offset: %#" + "cluster offset %#" PRIx64 + " unaligned (L2 offset: %#" PRIx64 ", L2 index: %#x)", - offset & L2E_OFFSET_MASK, - l2_offset, j); + offset, l2_offset, j); ret = -EIO; goto fail; } - cluster_index = (offset & L2E_OFFSET_MASK) >> s->cluster_bits; + cluster_index = offset >> s->cluster_bits; if (!cluster_index) { /* unallocated */ refcount = 0; @@ -XXX,XX +XXX,XX @@ int qcow2_update_snapshot_refcount(BlockDriverState *bs, } if (refcount == 1) { - offset |= QCOW_OFLAG_COPIED; + entry |= QCOW_OFLAG_COPIED; } - if (offset != old_offset) { + if (entry != old_entry) { if (addend > 0) { qcow2_cache_set_dependency(bs, s->l2_table_cache, s->refcount_block_cache); } - l2_table[j] = cpu_to_be64(offset); + l2_table[j] = cpu_to_be64(entry); qcow2_cache_entry_mark_dirty(bs, s->l2_table_cache, l2_table); } -- 1.8.3.1 From: Eric Blake <eblake@redhat.com> Fix a couple of inconsistent indentations, before an upcoming patch further tweaks the switch statements. (best viewed with 'git diff -b'). Signed-off-by: Eric Blake <eblake@redhat.com> Reviewed-by: Max Reitz <mreitz@redhat.com> Message-id: 20170507000552.20847-3-eblake@redhat.com Signed-off-by: Max Reitz <mreitz@redhat.com> --- block/qcow2-cluster.c | 32 +++++++++---------- block/qcow2-refcount.c | 84 +++++++++++++++++++++++++------------------------- 2 files changed, 58 insertions(+), 58 deletions(-) diff --git a/block/qcow2-cluster.c b/block/qcow2-cluster.c index XXXXXXX..XXXXXXX 100644 --- a/block/qcow2-cluster.c +++ b/block/qcow2-cluster.c @@ -XXX,XX +XXX,XX @@ static int discard_single_l2(BlockDriverState *bs, uint64_t offset, * but rather fall through to the backing file. */ switch (qcow2_get_cluster_type(old_l2_entry)) { - case QCOW2_CLUSTER_UNALLOCATED: - if (full_discard || !bs->backing) { - continue; - } - break; + case QCOW2_CLUSTER_UNALLOCATED: + if (full_discard || !bs->backing) { + continue; + } + break; - case QCOW2_CLUSTER_ZERO: - /* Preallocated zero clusters should be discarded in any case */ - if (!full_discard && (old_l2_entry & L2E_OFFSET_MASK) == 0) { - continue; - } - break; + case QCOW2_CLUSTER_ZERO: + /* Preallocated zero clusters should be discarded in any case */ + if (!full_discard && (old_l2_entry & L2E_OFFSET_MASK) == 0) { + continue; + } + break; - case QCOW2_CLUSTER_NORMAL: - case QCOW2_CLUSTER_COMPRESSED: - break; + case QCOW2_CLUSTER_NORMAL: + case QCOW2_CLUSTER_COMPRESSED: + break; - default: - abort(); + default: + abort(); } /* First remove L2 entries */ diff --git a/block/qcow2-refcount.c b/block/qcow2-refcount.c index XXXXXXX..XXXXXXX 100644 --- a/block/qcow2-refcount.c +++ b/block/qcow2-refcount.c @@ -XXX,XX +XXX,XX @@ int qcow2_update_snapshot_refcount(BlockDriverState *bs, offset = entry & L2E_OFFSET_MASK; switch (qcow2_get_cluster_type(entry)) { - case QCOW2_CLUSTER_COMPRESSED: - nb_csectors = ((entry >> s->csize_shift) & - s->csize_mask) + 1; - if (addend != 0) { - ret = update_refcount(bs, + case QCOW2_CLUSTER_COMPRESSED: + nb_csectors = ((entry >> s->csize_shift) & + s->csize_mask) + 1; + if (addend != 0) { + ret = update_refcount(bs, (entry & s->cluster_offset_mask) & ~511, nb_csectors * 512, abs(addend), addend < 0, QCOW2_DISCARD_SNAPSHOT); - if (ret < 0) { - goto fail; - } - } - /* compressed clusters are never modified */ - refcount = 2; - break; - - case QCOW2_CLUSTER_NORMAL: - case QCOW2_CLUSTER_ZERO: - if (offset_into_cluster(s, offset)) { - qcow2_signal_corruption(bs, true, -1, -1, "Data " - "cluster offset %#" PRIx64 - " unaligned (L2 offset: %#" - PRIx64 ", L2 index: %#x)", - offset, l2_offset, j); - ret = -EIO; + if (ret < 0) { goto fail; } + } + /* compressed clusters are never modified */ + refcount = 2; + break; + + case QCOW2_CLUSTER_NORMAL: + case QCOW2_CLUSTER_ZERO: + if (offset_into_cluster(s, offset)) { + qcow2_signal_corruption(bs, true, -1, -1, "Data " + "cluster offset %#" PRIx64 + " unaligned (L2 offset: %#" + PRIx64 ", L2 index: %#x)", + offset, l2_offset, j); + ret = -EIO; + goto fail; + } - cluster_index = offset >> s->cluster_bits; - if (!cluster_index) { - /* unallocated */ - refcount = 0; - break; - } - if (addend != 0) { - ret = qcow2_update_cluster_refcount(bs, + cluster_index = offset >> s->cluster_bits; + if (!cluster_index) { + /* unallocated */ + refcount = 0; + break; + } + if (addend != 0) { + ret = qcow2_update_cluster_refcount(bs, cluster_index, abs(addend), addend < 0, QCOW2_DISCARD_SNAPSHOT); - if (ret < 0) { - goto fail; - } - } - - ret = qcow2_get_refcount(bs, cluster_index, &refcount); if (ret < 0) { goto fail; } - break; + } - case QCOW2_CLUSTER_UNALLOCATED: - refcount = 0; - break; + ret = qcow2_get_refcount(bs, cluster_index, &refcount); + if (ret < 0) { + goto fail; + } + break; + + case QCOW2_CLUSTER_UNALLOCATED: + refcount = 0; + break; - default: - abort(); + default: + abort(); } if (refcount == 1) { -- 1.8.3.1 From: Eric Blake <eblake@redhat.com> We had some conflicting documentation: a nice 8-way table that described all possible combinations of DATA, ZERO, and OFFSET_VALID, contrasted with text that implied that OFFSET_VALID always meant raw data could be read directly. Furthermore, the text refers a lot to bs->file, even though the interface was updated back in 67a0fd2a to let the driver pass back a specific BDS (not necessarily bs->file). As the 8-way table is the intended semantics, simplify the rest of the text to get rid of the confusion. ALLOCATED is always set by the block layer for convenience (drivers do not have to worry about it). RAW is used only internally, but by more than the raw driver. Document these additional items on the driver callback. Suggested-by: Max Reitz <mreitz@redhat.com> Signed-off-by: Eric Blake <eblake@redhat.com> Reviewed-by: Max Reitz <mreitz@redhat.com> Message-id: 20170507000552.20847-4-eblake@redhat.com Signed-off-by: Max Reitz <mreitz@redhat.com> --- include/block/block.h | 35 +++++++++++++++++++---------------- include/block/block_int.h | 7 +++++++ 2 files changed, 26 insertions(+), 16 deletions(-) diff --git a/include/block/block.h b/include/block/block.h index XXXXXXX..XXXXXXX 100644 --- a/include/block/block.h +++ b/include/block/block.h @@ -XXX,XX +XXX,XX @@ typedef struct HDGeometry { #define BDRV_REQUEST_MAX_BYTES (BDRV_REQUEST_MAX_SECTORS << BDRV_SECTOR_BITS) /* - * Allocation status flags - * BDRV_BLOCK_DATA: data is read from a file returned by bdrv_get_block_status. - * BDRV_BLOCK_ZERO: sectors read as zero - * BDRV_BLOCK_OFFSET_VALID: sector stored as raw data in a file returned by - * bdrv_get_block_status. + * Allocation status flags for bdrv_get_block_status() and friends. + * + * Public flags: + * BDRV_BLOCK_DATA: allocation for data at offset is tied to this layer + * BDRV_BLOCK_ZERO: offset reads as zero + * BDRV_BLOCK_OFFSET_VALID: an associated offset exists for accessing raw data * BDRV_BLOCK_ALLOCATED: the content of the block is determined by this - * layer (as opposed to the backing file) - * BDRV_BLOCK_RAW: used internally to indicate that the request - * was answered by the raw driver and that one - * should look in bs->file directly. + * layer (short for DATA || ZERO), set by block layer * - * If BDRV_BLOCK_OFFSET_VALID is set, bits 9-62 represent the offset in - * bs->file where sector data can be read from as raw data. + * Internal flag: + * BDRV_BLOCK_RAW: used internally to indicate that the request was + * answered by a passthrough driver such as raw and that the + * block layer should recompute the answer from bs->file. * - * DATA == 0 && ZERO == 0 means that data is read from backing_hd if present. + * If BDRV_BLOCK_OFFSET_VALID is set, bits 9-62 (BDRV_BLOCK_OFFSET_MASK) + * represent the offset in the returned BDS that is allocated for the + * corresponding raw data; however, whether that offset actually contains + * data also depends on BDRV_BLOCK_DATA and BDRV_BLOCK_ZERO, as follows: * * DATA ZERO OFFSET_VALID - * t t t sectors read as zero, bs->file is zero at offset - * t f t sectors read as valid from bs->file at offset - * f t t sectors preallocated, read as zero, bs->file not + * t t t sectors read as zero, returned file is zero at offset + * t f t sectors read as valid from file at offset + * f t t sectors preallocated, read as zero, returned file not * necessarily zero at offset * f f t sectors preallocated but read from backing_hd, - * bs->file contains garbage at offset + * returned file contains garbage at offset * t t f sectors preallocated, read as zero, unknown offset * t f f sectors read from unknown file or offset * f t f not allocated or unknown offset, read as zero diff --git a/include/block/block_int.h b/include/block/block_int.h index XXXXXXX..XXXXXXX 100644 --- a/include/block/block_int.h +++ b/include/block/block_int.h @@ -XXX,XX +XXX,XX @@ struct BlockDriver { int64_t offset, int count, BdrvRequestFlags flags); int coroutine_fn (*bdrv_co_pdiscard)(BlockDriverState *bs, int64_t offset, int count); + + /* + * Building block for bdrv_block_status[_above]. The driver should + * answer only according to the current layer, and should not + * set BDRV_BLOCK_ALLOCATED, but may set BDRV_BLOCK_RAW. See block.h + * for the meaning of _DATA, _ZERO, and _OFFSET_VALID. + */ int64_t coroutine_fn (*bdrv_co_get_block_status)(BlockDriverState *bs, int64_t sector_num, int nb_sectors, int *pnum, BlockDriverState **file); -- 1.8.3.1 From: Eric Blake <eblake@redhat.com> We were throwing away the preallocation information associated with zero clusters. But we should be matching the well-defined semantics in bdrv_get_block_status(), where (BDRV_BLOCK_ZERO | BDRV_BLOCK_OFFSET_VALID) informs the user which offset is reserved, while still reminding the user that reading from that offset is likely to read garbage. count_contiguous_clusters_by_type() is now used only for unallocated cluster runs, hence it gets renamed and tightened. Making this change lets us see which portions of an image are zero but preallocated, when using qemu-img map --output=json. The --output=human side intentionally ignores all zero clusters, whether or not they are preallocated. The fact that there is no change to qemu-iotests './check -qcow2' merely means that we aren't yet testing this aspect of qemu-img; a later patch will add a test. Signed-off-by: Eric Blake <eblake@redhat.com> Reviewed-by: Max Reitz <mreitz@redhat.com> Message-id: 20170507000552.20847-5-eblake@redhat.com Signed-off-by: Max Reitz <mreitz@redhat.com> --- block/qcow2-cluster.c | 45 +++++++++++++++++++++++++++++++++++---------- 1 file changed, 35 insertions(+), 10 deletions(-) diff --git a/block/qcow2-cluster.c b/block/qcow2-cluster.c index XXXXXXX..XXXXXXX 100644 --- a/block/qcow2-cluster.c +++ b/block/qcow2-cluster.c @@ -XXX,XX +XXX,XX @@ static int count_contiguous_clusters(int nb_clusters, int cluster_size, return i; } -static int count_contiguous_clusters_by_type(int nb_clusters, - uint64_t *l2_table, - int wanted_type) +/* + * Checks how many consecutive unallocated clusters in a given L2 + * table have the same cluster type. + */ +static int count_contiguous_clusters_unallocated(int nb_clusters, + uint64_t *l2_table, + int wanted_type) { int i; + assert(wanted_type == QCOW2_CLUSTER_ZERO || + wanted_type == QCOW2_CLUSTER_UNALLOCATED); for (i = 0; i < nb_clusters; i++) { - int type = qcow2_get_cluster_type(be64_to_cpu(l2_table[i])); + uint64_t entry = be64_to_cpu(l2_table[i]); + int type = qcow2_get_cluster_type(entry); - if (type != wanted_type) { + if (type != wanted_type || entry & L2E_OFFSET_MASK) { break; } } @@ -XXX,XX +XXX,XX @@ int qcow2_get_cluster_offset(BlockDriverState *bs, uint64_t offset, ret = -EIO; goto fail; } - c = count_contiguous_clusters_by_type(nb_clusters, &l2_table[l2_index], - QCOW2_CLUSTER_ZERO); - *cluster_offset = 0; + /* Distinguish between pure zero clusters and pre-allocated ones */ + if (*cluster_offset & L2E_OFFSET_MASK) { + c = count_contiguous_clusters(nb_clusters, s->cluster_size, + &l2_table[l2_index], QCOW_OFLAG_ZERO); + *cluster_offset &= L2E_OFFSET_MASK; + if (offset_into_cluster(s, *cluster_offset)) { + qcow2_signal_corruption(bs, true, -1, -1, + "Preallocated zero cluster offset %#" + PRIx64 " unaligned (L2 offset: %#" + PRIx64 ", L2 index: %#x)", + *cluster_offset, l2_offset, l2_index); + ret = -EIO; + goto fail; + } + } else { + c = count_contiguous_clusters_unallocated(nb_clusters, + &l2_table[l2_index], + QCOW2_CLUSTER_ZERO); + *cluster_offset = 0; + } break; case QCOW2_CLUSTER_UNALLOCATED: /* how many empty clusters ? */ - c = count_contiguous_clusters_by_type(nb_clusters, &l2_table[l2_index], - QCOW2_CLUSTER_UNALLOCATED); + c = count_contiguous_clusters_unallocated(nb_clusters, + &l2_table[l2_index], + QCOW2_CLUSTER_UNALLOCATED); *cluster_offset = 0; break; case QCOW2_CLUSTER_NORMAL: -- 1.8.3.1 From: Eric Blake <eblake@redhat.com> Although it doesn't add all that much type safety (this is C, after all), it does add a bit of legibility to use the name QCow2ClusterType instead of a plain int. In particular, qcow2_get_cluster_offset() has an overloaded return type; a QCow2ClusterType on success, and -errno on failure; keeping the cluster type in a separate variable makes it slightly easier for the next patch to make further computations based on the type. Suggested-by: Max Reitz <mreitz@redhat.com> Signed-off-by: Eric Blake <eblake@redhat.com> Message-id: 20170507000552.20847-6-eblake@redhat.com [mreitz: Use the new type in two more places (one of them pulled from the next patch)] Signed-off-by: Max Reitz <mreitz@redhat.com> --- block/qcow2-cluster.c | 21 +++++++++++---------- block/qcow2-refcount.c | 2 +- block/qcow2.h | 6 +++--- 3 files changed, 15 insertions(+), 14 deletions(-) diff --git a/block/qcow2-cluster.c b/block/qcow2-cluster.c index XXXXXXX..XXXXXXX 100644 --- a/block/qcow2-cluster.c +++ b/block/qcow2-cluster.c @@ -XXX,XX +XXX,XX @@ static int count_contiguous_clusters(int nb_clusters, int cluster_size, uint64_t *l2_table, uint64_t stop_flags) { int i; - int first_cluster_type; + QCow2ClusterType first_cluster_type; uint64_t mask = stop_flags | L2E_OFFSET_MASK | QCOW_OFLAG_COMPRESSED; uint64_t first_entry = be64_to_cpu(l2_table[0]); uint64_t offset = first_entry & mask; @@ -XXX,XX +XXX,XX @@ static int count_contiguous_clusters(int nb_clusters, int cluster_size, */ static int count_contiguous_clusters_unallocated(int nb_clusters, uint64_t *l2_table, - int wanted_type) + QCow2ClusterType wanted_type) { int i; @@ -XXX,XX +XXX,XX @@ static int count_contiguous_clusters_unallocated(int nb_clusters, wanted_type == QCOW2_CLUSTER_UNALLOCATED); for (i = 0; i < nb_clusters; i++) { uint64_t entry = be64_to_cpu(l2_table[i]); - int type = qcow2_get_cluster_type(entry); + QCow2ClusterType type = qcow2_get_cluster_type(entry); if (type != wanted_type || entry & L2E_OFFSET_MASK) { break; @@ -XXX,XX +XXX,XX @@ int qcow2_get_cluster_offset(BlockDriverState *bs, uint64_t offset, int l1_bits, c; unsigned int offset_in_cluster; uint64_t bytes_available, bytes_needed, nb_clusters; + QCow2ClusterType type; int ret; offset_in_cluster = offset_into_cluster(s, offset); @@ -XXX,XX +XXX,XX @@ int qcow2_get_cluster_offset(BlockDriverState *bs, uint64_t offset, l1_index = offset >> l1_bits; if (l1_index >= s->l1_size) { - ret = QCOW2_CLUSTER_UNALLOCATED; + type = QCOW2_CLUSTER_UNALLOCATED; goto out; } l2_offset = s->l1_table[l1_index] & L1E_OFFSET_MASK; if (!l2_offset) { - ret = QCOW2_CLUSTER_UNALLOCATED; + type = QCOW2_CLUSTER_UNALLOCATED; goto out; } @@ -XXX,XX +XXX,XX @@ int qcow2_get_cluster_offset(BlockDriverState *bs, uint64_t offset, * true */ assert(nb_clusters <= INT_MAX); - ret = qcow2_get_cluster_type(*cluster_offset); - switch (ret) { + type = qcow2_get_cluster_type(*cluster_offset); + switch (type) { case QCOW2_CLUSTER_COMPRESSED: /* Compressed clusters can only be processed one by one */ c = 1; @@ -XXX,XX +XXX,XX @@ out: assert(bytes_available - offset_in_cluster <= UINT_MAX); *bytes = bytes_available - offset_in_cluster; - return ret; + return type; fail: qcow2_cache_put(bs, s->l2_table_cache, (void **)&l2_table); @@ -XXX,XX +XXX,XX @@ static int count_cow_clusters(BDRVQcow2State *s, int nb_clusters, for (i = 0; i < nb_clusters; i++) { uint64_t l2_entry = be64_to_cpu(l2_table[l2_index + i]); - int cluster_type = qcow2_get_cluster_type(l2_entry); + QCow2ClusterType cluster_type = qcow2_get_cluster_type(l2_entry); switch(cluster_type) { case QCOW2_CLUSTER_NORMAL: @@ -XXX,XX +XXX,XX @@ static int expand_zero_clusters_in_l1(BlockDriverState *bs, uint64_t *l1_table, for (j = 0; j < s->l2_size; j++) { uint64_t l2_entry = be64_to_cpu(l2_table[j]); int64_t offset = l2_entry & L2E_OFFSET_MASK; - int cluster_type = qcow2_get_cluster_type(l2_entry); + QCow2ClusterType cluster_type = qcow2_get_cluster_type(l2_entry); bool preallocated = offset != 0; if (cluster_type != QCOW2_CLUSTER_ZERO) { diff --git a/block/qcow2-refcount.c b/block/qcow2-refcount.c index XXXXXXX..XXXXXXX 100644 --- a/block/qcow2-refcount.c +++ b/block/qcow2-refcount.c @@ -XXX,XX +XXX,XX @@ static int check_oflag_copied(BlockDriverState *bs, BdrvCheckResult *res, for (j = 0; j < s->l2_size; j++) { uint64_t l2_entry = be64_to_cpu(l2_table[j]); uint64_t data_offset = l2_entry & L2E_OFFSET_MASK; - int cluster_type = qcow2_get_cluster_type(l2_entry); + QCow2ClusterType cluster_type = qcow2_get_cluster_type(l2_entry); if ((cluster_type == QCOW2_CLUSTER_NORMAL) || ((cluster_type == QCOW2_CLUSTER_ZERO) && (data_offset != 0))) { diff --git a/block/qcow2.h b/block/qcow2.h index XXXXXXX..XXXXXXX 100644 --- a/block/qcow2.h +++ b/block/qcow2.h @@ -XXX,XX +XXX,XX @@ typedef struct QCowL2Meta QLIST_ENTRY(QCowL2Meta) next_in_flight; } QCowL2Meta; -enum { +typedef enum QCow2ClusterType { QCOW2_CLUSTER_UNALLOCATED, QCOW2_CLUSTER_NORMAL, QCOW2_CLUSTER_COMPRESSED, QCOW2_CLUSTER_ZERO -}; +} QCow2ClusterType; typedef enum QCow2MetadataOverlap { QCOW2_OL_MAIN_HEADER_BITNR = 0, @@ -XXX,XX +XXX,XX @@ static inline uint64_t qcow2_max_refcount_clusters(BDRVQcow2State *s) return QCOW_MAX_REFTABLE_SIZE >> s->cluster_bits; } -static inline int qcow2_get_cluster_type(uint64_t l2_entry) +static inline QCow2ClusterType qcow2_get_cluster_type(uint64_t l2_entry) { if (l2_entry & QCOW_OFLAG_COMPRESSED) { return QCOW2_CLUSTER_COMPRESSED; -- 1.8.3.1 From: Eric Blake <eblake@redhat.com> Treat plain zero clusters differently from allocated ones, so that we can simplify the logic of checking whether an offset is present. Do this by splitting QCOW2_CLUSTER_ZERO into two new enums, QCOW2_CLUSTER_ZERO_PLAIN and QCOW2_CLUSTER_ZERO_ALLOC. I tried to arrange the enum so that we could use 'ret <= QCOW2_CLUSTER_ZERO_PLAIN' for all unallocated types, and 'ret >= QCOW2_CLUSTER_ZERO_ALLOC' for allocated types, although I didn't actually end up taking advantage of the layout. In many cases, this leads to simpler code, by properly combining cases (sometimes, both zero types pair together, other times, plain zero is more like unallocated while allocated zero is more like normal). Signed-off-by: Eric Blake <eblake@redhat.com> Message-id: 20170507000552.20847-7-eblake@redhat.com Reviewed-by: Max Reitz <mreitz@redhat.com> Signed-off-by: Max Reitz <mreitz@redhat.com> --- block/qcow2-cluster.c | 79 ++++++++++++++++++---------------------------- block/qcow2-refcount.c | 44 +++++++++++--------------- block/qcow2.c | 9 ++++-- block/qcow2.h | 8 +++-- tests/qemu-iotests/060.out | 6 ++-- 5 files changed, 63 insertions(+), 83 deletions(-) diff --git a/block/qcow2-cluster.c b/block/qcow2-cluster.c index XXXXXXX..XXXXXXX 100644 --- a/block/qcow2-cluster.c +++ b/block/qcow2-cluster.c @@ -XXX,XX +XXX,XX @@ static int count_contiguous_clusters(int nb_clusters, int cluster_size, /* must be allocated */ first_cluster_type = qcow2_get_cluster_type(first_entry); assert(first_cluster_type == QCOW2_CLUSTER_NORMAL || - (first_cluster_type == QCOW2_CLUSTER_ZERO && - (first_entry & L2E_OFFSET_MASK) != 0)); + first_cluster_type == QCOW2_CLUSTER_ZERO_ALLOC); for (i = 0; i < nb_clusters; i++) { uint64_t l2_entry = be64_to_cpu(l2_table[i]) & mask; @@ -XXX,XX +XXX,XX @@ static int count_contiguous_clusters_unallocated(int nb_clusters, { int i; - assert(wanted_type == QCOW2_CLUSTER_ZERO || + assert(wanted_type == QCOW2_CLUSTER_ZERO_PLAIN || wanted_type == QCOW2_CLUSTER_UNALLOCATED); for (i = 0; i < nb_clusters; i++) { uint64_t entry = be64_to_cpu(l2_table[i]); QCow2ClusterType type = qcow2_get_cluster_type(entry); - if (type != wanted_type || entry & L2E_OFFSET_MASK) { + if (type != wanted_type) { break; } } @@ -XXX,XX +XXX,XX @@ int qcow2_get_cluster_offset(BlockDriverState *bs, uint64_t offset, assert(nb_clusters <= INT_MAX); type = qcow2_get_cluster_type(*cluster_offset); + if (s->qcow_version < 3 && (type == QCOW2_CLUSTER_ZERO_PLAIN || + type == QCOW2_CLUSTER_ZERO_ALLOC)) { + qcow2_signal_corruption(bs, true, -1, -1, "Zero cluster entry found" + " in pre-v3 image (L2 offset: %#" PRIx64 + ", L2 index: %#x)", l2_offset, l2_index); + ret = -EIO; + goto fail; + } switch (type) { case QCOW2_CLUSTER_COMPRESSED: /* Compressed clusters can only be processed one by one */ c = 1; *cluster_offset &= L2E_COMPRESSED_OFFSET_SIZE_MASK; break; - case QCOW2_CLUSTER_ZERO: - if (s->qcow_version < 3) { - qcow2_signal_corruption(bs, true, -1, -1, "Zero cluster entry found" - " in pre-v3 image (L2 offset: %#" PRIx64 - ", L2 index: %#x)", l2_offset, l2_index); - ret = -EIO; - goto fail; - } - /* Distinguish between pure zero clusters and pre-allocated ones */ - if (*cluster_offset & L2E_OFFSET_MASK) { - c = count_contiguous_clusters(nb_clusters, s->cluster_size, - &l2_table[l2_index], QCOW_OFLAG_ZERO); - *cluster_offset &= L2E_OFFSET_MASK; - if (offset_into_cluster(s, *cluster_offset)) { - qcow2_signal_corruption(bs, true, -1, -1, - "Preallocated zero cluster offset %#" - PRIx64 " unaligned (L2 offset: %#" - PRIx64 ", L2 index: %#x)", - *cluster_offset, l2_offset, l2_index); - ret = -EIO; - goto fail; - } - } else { - c = count_contiguous_clusters_unallocated(nb_clusters, - &l2_table[l2_index], - QCOW2_CLUSTER_ZERO); - *cluster_offset = 0; - } - break; + case QCOW2_CLUSTER_ZERO_PLAIN: case QCOW2_CLUSTER_UNALLOCATED: /* how many empty clusters ? */ c = count_contiguous_clusters_unallocated(nb_clusters, - &l2_table[l2_index], - QCOW2_CLUSTER_UNALLOCATED); + &l2_table[l2_index], type); *cluster_offset = 0; break; + case QCOW2_CLUSTER_ZERO_ALLOC: case QCOW2_CLUSTER_NORMAL: /* how many allocated clusters ? */ c = count_contiguous_clusters(nb_clusters, s->cluster_size, - &l2_table[l2_index], QCOW_OFLAG_ZERO); + &l2_table[l2_index], QCOW_OFLAG_ZERO); *cluster_offset &= L2E_OFFSET_MASK; if (offset_into_cluster(s, *cluster_offset)) { - qcow2_signal_corruption(bs, true, -1, -1, "Data cluster offset %#" + qcow2_signal_corruption(bs, true, -1, -1, + "Cluster allocation offset %#" PRIx64 " unaligned (L2 offset: %#" PRIx64 ", L2 index: %#x)", *cluster_offset, l2_offset, l2_index); @@ -XXX,XX +XXX,XX @@ static int count_cow_clusters(BDRVQcow2State *s, int nb_clusters, break; case QCOW2_CLUSTER_UNALLOCATED: case QCOW2_CLUSTER_COMPRESSED: - case QCOW2_CLUSTER_ZERO: + case QCOW2_CLUSTER_ZERO_PLAIN: + case QCOW2_CLUSTER_ZERO_ALLOC: break; default: abort(); @@ -XXX,XX +XXX,XX @@ static int handle_alloc(BlockDriverState *bs, uint64_t guest_offset, * wrong with our code. */ assert(nb_clusters > 0); - if (qcow2_get_cluster_type(entry) == QCOW2_CLUSTER_ZERO && - (entry & L2E_OFFSET_MASK) != 0 && (entry & QCOW_OFLAG_COPIED) && + if (qcow2_get_cluster_type(entry) == QCOW2_CLUSTER_ZERO_ALLOC && + (entry & QCOW_OFLAG_COPIED) && (!*host_offset || start_of_cluster(s, *host_offset) == (entry & L2E_OFFSET_MASK))) { @@ -XXX,XX +XXX,XX @@ static int discard_single_l2(BlockDriverState *bs, uint64_t offset, } break; - case QCOW2_CLUSTER_ZERO: - /* Preallocated zero clusters should be discarded in any case */ - if (!full_discard && (old_l2_entry & L2E_OFFSET_MASK) == 0) { + case QCOW2_CLUSTER_ZERO_PLAIN: + if (!full_discard) { continue; } break; + case QCOW2_CLUSTER_ZERO_ALLOC: case QCOW2_CLUSTER_NORMAL: case QCOW2_CLUSTER_COMPRESSED: break; @@ -XXX,XX +XXX,XX @@ static int expand_zero_clusters_in_l1(BlockDriverState *bs, uint64_t *l1_table, uint64_t l2_entry = be64_to_cpu(l2_table[j]); int64_t offset = l2_entry & L2E_OFFSET_MASK; QCow2ClusterType cluster_type = qcow2_get_cluster_type(l2_entry); - bool preallocated = offset != 0; - if (cluster_type != QCOW2_CLUSTER_ZERO) { + if (cluster_type != QCOW2_CLUSTER_ZERO_PLAIN && + cluster_type != QCOW2_CLUSTER_ZERO_ALLOC) { continue; } - if (!preallocated) { + if (cluster_type == QCOW2_CLUSTER_ZERO_PLAIN) { if (!bs->backing) { /* not backed; therefore we can simply deallocate the * cluster */ @@ -XXX,XX +XXX,XX @@ static int expand_zero_clusters_in_l1(BlockDriverState *bs, uint64_t *l1_table, "%#" PRIx64 " unaligned (L2 offset: %#" PRIx64 ", L2 index: %#x)", offset, l2_offset, j); - if (!preallocated) { + if (cluster_type == QCOW2_CLUSTER_ZERO_PLAIN) { qcow2_free_clusters(bs, offset, s->cluster_size, QCOW2_DISCARD_ALWAYS); } @@ -XXX,XX +XXX,XX @@ static int expand_zero_clusters_in_l1(BlockDriverState *bs, uint64_t *l1_table, ret = qcow2_pre_write_overlap_check(bs, 0, offset, s->cluster_size); if (ret < 0) { - if (!preallocated) { + if (cluster_type == QCOW2_CLUSTER_ZERO_PLAIN) { qcow2_free_clusters(bs, offset, s->cluster_size, QCOW2_DISCARD_ALWAYS); } @@ -XXX,XX +XXX,XX @@ static int expand_zero_clusters_in_l1(BlockDriverState *bs, uint64_t *l1_table, ret = bdrv_pwrite_zeroes(bs->file, offset, s->cluster_size, 0); if (ret < 0) { - if (!preallocated) { + if (cluster_type == QCOW2_CLUSTER_ZERO_PLAIN) { qcow2_free_clusters(bs, offset, s->cluster_size, QCOW2_DISCARD_ALWAYS); } diff --git a/block/qcow2-refcount.c b/block/qcow2-refcount.c index XXXXXXX..XXXXXXX 100644 --- a/block/qcow2-refcount.c +++ b/block/qcow2-refcount.c @@ -XXX,XX +XXX,XX @@ void qcow2_free_any_clusters(BlockDriverState *bs, uint64_t l2_entry, } break; case QCOW2_CLUSTER_NORMAL: - case QCOW2_CLUSTER_ZERO: - if (l2_entry & L2E_OFFSET_MASK) { - if (offset_into_cluster(s, l2_entry & L2E_OFFSET_MASK)) { - qcow2_signal_corruption(bs, false, -1, -1, - "Cannot free unaligned cluster %#llx", - l2_entry & L2E_OFFSET_MASK); - } else { - qcow2_free_clusters(bs, l2_entry & L2E_OFFSET_MASK, - nb_clusters << s->cluster_bits, type); - } + case QCOW2_CLUSTER_ZERO_ALLOC: + if (offset_into_cluster(s, l2_entry & L2E_OFFSET_MASK)) { + qcow2_signal_corruption(bs, false, -1, -1, + "Cannot free unaligned cluster %#llx", + l2_entry & L2E_OFFSET_MASK); + } else { + qcow2_free_clusters(bs, l2_entry & L2E_OFFSET_MASK, + nb_clusters << s->cluster_bits, type); } break; + case QCOW2_CLUSTER_ZERO_PLAIN: case QCOW2_CLUSTER_UNALLOCATED: break; default: @@ -XXX,XX +XXX,XX @@ int qcow2_update_snapshot_refcount(BlockDriverState *bs, break; case QCOW2_CLUSTER_NORMAL: - case QCOW2_CLUSTER_ZERO: + case QCOW2_CLUSTER_ZERO_ALLOC: if (offset_into_cluster(s, offset)) { - qcow2_signal_corruption(bs, true, -1, -1, "Data " - "cluster offset %#" PRIx64 + qcow2_signal_corruption(bs, true, -1, -1, "Cluster " + "allocation offset %#" PRIx64 " unaligned (L2 offset: %#" PRIx64 ", L2 index: %#x)", offset, l2_offset, j); @@ -XXX,XX +XXX,XX @@ int qcow2_update_snapshot_refcount(BlockDriverState *bs, } cluster_index = offset >> s->cluster_bits; - if (!cluster_index) { - /* unallocated */ - refcount = 0; - break; - } + assert(cluster_index); if (addend != 0) { ret = qcow2_update_cluster_refcount(bs, cluster_index, abs(addend), addend < 0, @@ -XXX,XX +XXX,XX @@ int qcow2_update_snapshot_refcount(BlockDriverState *bs, } break; + case QCOW2_CLUSTER_ZERO_PLAIN: case QCOW2_CLUSTER_UNALLOCATED: refcount = 0; break; @@ -XXX,XX +XXX,XX @@ static int check_refcounts_l2(BlockDriverState *bs, BdrvCheckResult *res, } break; - case QCOW2_CLUSTER_ZERO: - if ((l2_entry & L2E_OFFSET_MASK) == 0) { - break; - } - /* fall through */ - + case QCOW2_CLUSTER_ZERO_ALLOC: case QCOW2_CLUSTER_NORMAL: { uint64_t offset = l2_entry & L2E_OFFSET_MASK; @@ -XXX,XX +XXX,XX @@ static int check_refcounts_l2(BlockDriverState *bs, BdrvCheckResult *res, break; } + case QCOW2_CLUSTER_ZERO_PLAIN: case QCOW2_CLUSTER_UNALLOCATED: break; @@ -XXX,XX +XXX,XX @@ static int check_oflag_copied(BlockDriverState *bs, BdrvCheckResult *res, uint64_t data_offset = l2_entry & L2E_OFFSET_MASK; QCow2ClusterType cluster_type = qcow2_get_cluster_type(l2_entry); - if ((cluster_type == QCOW2_CLUSTER_NORMAL) || - ((cluster_type == QCOW2_CLUSTER_ZERO) && (data_offset != 0))) { + if (cluster_type == QCOW2_CLUSTER_NORMAL || + cluster_type == QCOW2_CLUSTER_ZERO_ALLOC) { ret = qcow2_get_refcount(bs, data_offset >> s->cluster_bits, &refcount); diff --git a/block/qcow2.c b/block/qcow2.c index XXXXXXX..XXXXXXX 100644 --- a/block/qcow2.c +++ b/block/qcow2.c @@ -XXX,XX +XXX,XX @@ static int64_t coroutine_fn qcow2_co_get_block_status(BlockDriverState *bs, *file = bs->file->bs; status |= BDRV_BLOCK_OFFSET_VALID | cluster_offset; } - if (ret == QCOW2_CLUSTER_ZERO) { + if (ret == QCOW2_CLUSTER_ZERO_PLAIN || ret == QCOW2_CLUSTER_ZERO_ALLOC) { status |= BDRV_BLOCK_ZERO; } else if (ret != QCOW2_CLUSTER_UNALLOCATED) { status |= BDRV_BLOCK_DATA; @@ -XXX,XX +XXX,XX @@ static coroutine_fn int qcow2_co_preadv(BlockDriverState *bs, uint64_t offset, } break; - case QCOW2_CLUSTER_ZERO: + case QCOW2_CLUSTER_ZERO_PLAIN: + case QCOW2_CLUSTER_ZERO_ALLOC: qemu_iovec_memset(&hd_qiov, 0, 0, cur_bytes); break; @@ -XXX,XX +XXX,XX @@ static coroutine_fn int qcow2_co_pwrite_zeroes(BlockDriverState *bs, count = s->cluster_size; nr = s->cluster_size; ret = qcow2_get_cluster_offset(bs, offset, &nr, &off); - if (ret != QCOW2_CLUSTER_UNALLOCATED && ret != QCOW2_CLUSTER_ZERO) { + if (ret != QCOW2_CLUSTER_UNALLOCATED && + ret != QCOW2_CLUSTER_ZERO_PLAIN && + ret != QCOW2_CLUSTER_ZERO_ALLOC) { qemu_co_mutex_unlock(&s->lock); return -ENOTSUP; } diff --git a/block/qcow2.h b/block/qcow2.h index XXXXXXX..XXXXXXX 100644 --- a/block/qcow2.h +++ b/block/qcow2.h @@ -XXX,XX +XXX,XX @@ typedef struct QCowL2Meta typedef enum QCow2ClusterType { QCOW2_CLUSTER_UNALLOCATED, + QCOW2_CLUSTER_ZERO_PLAIN, + QCOW2_CLUSTER_ZERO_ALLOC, QCOW2_CLUSTER_NORMAL, QCOW2_CLUSTER_COMPRESSED, - QCOW2_CLUSTER_ZERO } QCow2ClusterType; typedef enum QCow2MetadataOverlap { @@ -XXX,XX +XXX,XX @@ static inline QCow2ClusterType qcow2_get_cluster_type(uint64_t l2_entry) if (l2_entry & QCOW_OFLAG_COMPRESSED) { return QCOW2_CLUSTER_COMPRESSED; } else if (l2_entry & QCOW_OFLAG_ZERO) { - return QCOW2_CLUSTER_ZERO; + if (l2_entry & L2E_OFFSET_MASK) { + return QCOW2_CLUSTER_ZERO_ALLOC; + } + return QCOW2_CLUSTER_ZERO_PLAIN; } else if (!(l2_entry & L2E_OFFSET_MASK)) { return QCOW2_CLUSTER_UNALLOCATED; } else { diff --git a/tests/qemu-iotests/060.out b/tests/qemu-iotests/060.out index XXXXXXX..XXXXXXX 100644 --- a/tests/qemu-iotests/060.out +++ b/tests/qemu-iotests/060.out @@ -XXX,XX +XXX,XX @@ qemu-img: Error while amending options: Input/output error Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=67108864 wrote 65536/65536 bytes at offset 0 64 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec) -qcow2: Marking image as corrupt: Data cluster offset 0x52a00 unaligned (L2 offset: 0x40000, L2 index: 0); further corruption events will be suppressed +qcow2: Marking image as corrupt: Cluster allocation offset 0x52a00 unaligned (L2 offset: 0x40000, L2 index: 0); further corruption events will be suppressed read failed: Input/output error === Testing unaligned pre-allocated zero cluster === @@ -XXX,XX +XXX,XX @@ discard 65536/65536 bytes at offset 0 Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=67108864 wrote 65536/65536 bytes at offset 0 64 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec) -qcow2: Image is corrupt: Data cluster offset 0x52a00 unaligned (L2 offset: 0x40000, L2 index: 0); further non-fatal corruption events will be suppressed +qcow2: Image is corrupt: Cluster allocation offset 0x52a00 unaligned (L2 offset: 0x40000, L2 index: 0); further non-fatal corruption events will be suppressed read failed: Input/output error read failed: Input/output error @@ -XXX,XX +XXX,XX @@ Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=67108864 wrote 131072/131072 bytes at offset 0 128 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec) qcow2: Image is corrupt: Cannot free unaligned cluster 0x52a00; further non-fatal corruption events will be suppressed -qcow2: Marking image as corrupt: Data cluster offset 0x62a00 unaligned (L2 offset: 0x40000, L2 index: 0x1); further corruption events will be suppressed +qcow2: Marking image as corrupt: Cluster allocation offset 0x62a00 unaligned (L2 offset: 0x40000, L2 index: 0x1); further corruption events will be suppressed discard 65536/65536 bytes at offset 0 64 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec) read failed: Input/output error -- 1.8.3.1 From: Eric Blake <eblake@redhat.com> Similar to discard_single_l2(), we should try to avoid dirtying the L2 cache when the cluster we are changing already has the right characteristics. Note that by the time we get to zero_single_l2(), BDRV_REQ_MAY_UNMAP is a requirement to unallocate a cluster (this is because the block layer clears that flag if discard.* flags during open requested that we never punch holes - see the conversation around commit 170f4b2e, https://lists.gnu.org/archive/html/qemu-devel/2016-09/msg07306.html). Therefore, this patch can only reuse a zero cluster as-is if either unmapping is not requested, or if the zero cluster was not associated with an allocation. Technically, there are some cases where an unallocated cluster already reads as all zeroes (namely, when there is no backing file [easy: check bs->backing], or when the backing file also reads as zeroes [harder: we can't check bdrv_get_block_status since we are already holding the lock]), where the guest would not immediately see a difference if we left that cluster unallocated. But if the user did not request unmapping, leaving an unallocated cluster is wrong; and even if the user DID request unmapping, keeping a cluster unallocated risks a subtle semantic change of guest-visible contents if a backing file is later added, and it is not worth auditing whether all internal uses such as mirror properly avoid an unmap request. Thus, this patch is intentionally limited to just clusters that are already marked as zero. Signed-off-by: Eric Blake <eblake@redhat.com> Reviewed-by: Max Reitz <mreitz@redhat.com> Message-id: 20170507000552.20847-8-eblake@redhat.com Signed-off-by: Max Reitz <mreitz@redhat.com> --- block/qcow2-cluster.c | 15 +++++++++++++-- 1 file changed, 13 insertions(+), 2 deletions(-) diff --git a/block/qcow2-cluster.c b/block/qcow2-cluster.c index XXXXXXX..XXXXXXX 100644 --- a/block/qcow2-cluster.c +++ b/block/qcow2-cluster.c @@ -XXX,XX +XXX,XX @@ static int zero_single_l2(BlockDriverState *bs, uint64_t offset, int l2_index; int ret; int i; + bool unmap = !!(flags & BDRV_REQ_MAY_UNMAP); ret = get_cluster_table(bs, offset, &l2_table, &l2_index); if (ret < 0) { @@ -XXX,XX +XXX,XX @@ static int zero_single_l2(BlockDriverState *bs, uint64_t offset, for (i = 0; i < nb_clusters; i++) { uint64_t old_offset; + QCow2ClusterType cluster_type; old_offset = be64_to_cpu(l2_table[l2_index + i]); - /* Update L2 entries */ + /* + * Minimize L2 changes if the cluster already reads back as + * zeroes with correct allocation. + */ + cluster_type = qcow2_get_cluster_type(old_offset); + if (cluster_type == QCOW2_CLUSTER_ZERO_PLAIN || + (cluster_type == QCOW2_CLUSTER_ZERO_ALLOC && !unmap)) { + continue; + } + qcow2_cache_entry_mark_dirty(bs, s->l2_table_cache, l2_table); - if (old_offset & QCOW_OFLAG_COMPRESSED || flags & BDRV_REQ_MAY_UNMAP) { + if (cluster_type == QCOW2_CLUSTER_COMPRESSED || unmap) { l2_table[l2_index + i] = cpu_to_be64(QCOW_OFLAG_ZERO); qcow2_free_any_clusters(bs, old_offset, 1, QCOW2_DISCARD_REQUEST); } else { -- 1.8.3.1 From: Eric Blake <eblake@redhat.com> Although _filter_qemu_img_map documents that it scrubs offsets, it was only doing so for human mode. Of the existing tests using the filter (97, 122, 150, 154, 176), two of them are affected, but it does not hurt the validity of the tests to not require particular mappings (another test, 66, uses offsets but intentionally does not pass through _filter_qemu_img_map, because it checks that offsets are unchanged before and after an operation). Another justification for this patch is that it will allow a future patch to utilize 'qemu-img map --output=json' to check the status of preallocated zero clusters without regards to the mapping (since the qcow2 mapping can be very sensitive to the chosen cluster size, when preallocation is not in use). Signed-off-by: Eric Blake <eblake@redhat.com> Reviewed-by: Max Reitz <mreitz@redhat.com> Message-id: 20170507000552.20847-9-eblake@redhat.com Signed-off-by: Max Reitz <mreitz@redhat.com> --- tests/qemu-iotests/122.out | 16 ++++++++-------- tests/qemu-iotests/154.out | 30 +++++++++++++++--------------- tests/qemu-iotests/common.filter | 4 +++- 3 files changed, 26 insertions(+), 24 deletions(-) diff --git a/tests/qemu-iotests/122.out b/tests/qemu-iotests/122.out index XXXXXXX..XXXXXXX 100644 --- a/tests/qemu-iotests/122.out +++ b/tests/qemu-iotests/122.out @@ -XXX,XX +XXX,XX @@ read 3145728/3145728 bytes at offset 0 3 MiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec) read 63963136/63963136 bytes at offset 3145728 61 MiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec) -[{ "start": 0, "length": 67108864, "depth": 0, "zero": false, "data": true, "offset": 327680}] +[{ "start": 0, "length": 67108864, "depth": 0, "zero": false, "data": true, "offset": OFFSET}] convert -c -S 0: read 3145728/3145728 bytes at offset 0 @@ -XXX,XX +XXX,XX @@ read 30408704/30408704 bytes at offset 3145728 29 MiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec) read 33554432/33554432 bytes at offset 33554432 32 MiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec) -[{ "start": 0, "length": 67108864, "depth": 0, "zero": false, "data": true, "offset": 327680}] +[{ "start": 0, "length": 67108864, "depth": 0, "zero": false, "data": true, "offset": OFFSET}] convert -c -S 0 with source backing file: read 3145728/3145728 bytes at offset 0 @@ -XXX,XX +XXX,XX @@ read 30408704/30408704 bytes at offset 3145728 29 MiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec) read 33554432/33554432 bytes at offset 33554432 32 MiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec) -[{ "start": 0, "length": 67108864, "depth": 0, "zero": false, "data": true, "offset": 327680}] +[{ "start": 0, "length": 67108864, "depth": 0, "zero": false, "data": true, "offset": OFFSET}] convert -c -S 0 -B ... read 3145728/3145728 bytes at offset 0 @@ -XXX,XX +XXX,XX @@ wrote 1024/1024 bytes at offset 17408 1 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec) convert -S 4k -[{ "start": 0, "length": 1024, "depth": 0, "zero": false, "data": true, "offset": 8192}, +[{ "start": 0, "length": 1024, "depth": 0, "zero": false, "data": true, "offset": OFFSET}, { "start": 1024, "length": 7168, "depth": 0, "zero": true, "data": false}, -{ "start": 8192, "length": 1024, "depth": 0, "zero": false, "data": true, "offset": 9216}, +{ "start": 8192, "length": 1024, "depth": 0, "zero": false, "data": true, "offset": OFFSET}, { "start": 9216, "length": 8192, "depth": 0, "zero": true, "data": false}, -{ "start": 17408, "length": 1024, "depth": 0, "zero": false, "data": true, "offset": 10240}, +{ "start": 17408, "length": 1024, "depth": 0, "zero": false, "data": true, "offset": OFFSET}, { "start": 18432, "length": 67090432, "depth": 0, "zero": true, "data": false}] convert -c -S 4k @@ -XXX,XX +XXX,XX @@ convert -c -S 4k { "start": 18432, "length": 67090432, "depth": 0, "zero": true, "data": false}] convert -S 8k -[{ "start": 0, "length": 9216, "depth": 0, "zero": false, "data": true, "offset": 8192}, +[{ "start": 0, "length": 9216, "depth": 0, "zero": false, "data": true, "offset": OFFSET}, { "start": 9216, "length": 8192, "depth": 0, "zero": true, "data": false}, -{ "start": 17408, "length": 1024, "depth": 0, "zero": false, "data": true, "offset": 17408}, +{ "start": 17408, "length": 1024, "depth": 0, "zero": false, "data": true, "offset": OFFSET}, { "start": 18432, "length": 67090432, "depth": 0, "zero": true, "data": false}] convert -c -S 8k diff --git a/tests/qemu-iotests/154.out b/tests/qemu-iotests/154.out index XXXXXXX..XXXXXXX 100644 --- a/tests/qemu-iotests/154.out +++ b/tests/qemu-iotests/154.out @@ -XXX,XX +XXX,XX @@ read 1024/1024 bytes at offset 65536 read 2048/2048 bytes at offset 67584 2 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec) [{ "start": 0, "length": 32768, "depth": 1, "zero": true, "data": false}, -{ "start": 32768, "length": 4096, "depth": 0, "zero": false, "data": true, "offset": 20480}, +{ "start": 32768, "length": 4096, "depth": 0, "zero": false, "data": true, "offset": OFFSET}, { "start": 36864, "length": 28672, "depth": 1, "zero": true, "data": false}, -{ "start": 65536, "length": 4096, "depth": 0, "zero": false, "data": true, "offset": 24576}, +{ "start": 65536, "length": 4096, "depth": 0, "zero": false, "data": true, "offset": OFFSET}, { "start": 69632, "length": 134148096, "depth": 1, "zero": true, "data": false}] == backing file contains non-zero data after write_zeroes == @@ -XXX,XX +XXX,XX @@ read 1024/1024 bytes at offset 44032 read 3072/3072 bytes at offset 40960 3 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec) [{ "start": 0, "length": 32768, "depth": 1, "zero": true, "data": false}, -{ "start": 32768, "length": 4096, "depth": 0, "zero": false, "data": true, "offset": 20480}, +{ "start": 32768, "length": 4096, "depth": 0, "zero": false, "data": true, "offset": OFFSET}, { "start": 36864, "length": 4096, "depth": 1, "zero": true, "data": false}, -{ "start": 40960, "length": 4096, "depth": 0, "zero": false, "data": true, "offset": 24576}, +{ "start": 40960, "length": 4096, "depth": 0, "zero": false, "data": true, "offset": OFFSET}, { "start": 45056, "length": 134172672, "depth": 1, "zero": true, "data": false}] == write_zeroes covers non-zero data == @@ -XXX,XX +XXX,XX @@ read 1024/1024 bytes at offset 67584 read 5120/5120 bytes at offset 68608 5 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec) [{ "start": 0, "length": 32768, "depth": 1, "zero": true, "data": false}, -{ "start": 32768, "length": 4096, "depth": 0, "zero": false, "data": true, "offset": 20480}, +{ "start": 32768, "length": 4096, "depth": 0, "zero": false, "data": true, "offset": OFFSET}, { "start": 36864, "length": 4096, "depth": 0, "zero": true, "data": false}, { "start": 40960, "length": 8192, "depth": 1, "zero": true, "data": false}, -{ "start": 49152, "length": 4096, "depth": 0, "zero": false, "data": true, "offset": 24576}, +{ "start": 49152, "length": 4096, "depth": 0, "zero": false, "data": true, "offset": OFFSET}, { "start": 53248, "length": 4096, "depth": 0, "zero": true, "data": false}, { "start": 57344, "length": 8192, "depth": 1, "zero": true, "data": false}, -{ "start": 65536, "length": 4096, "depth": 0, "zero": false, "data": true, "offset": 28672}, +{ "start": 65536, "length": 4096, "depth": 0, "zero": false, "data": true, "offset": OFFSET}, { "start": 69632, "length": 4096, "depth": 0, "zero": true, "data": false}, { "start": 73728, "length": 134144000, "depth": 1, "zero": true, "data": false}] @@ -XXX,XX +XXX,XX @@ read 1024/1024 bytes at offset 72704 1 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec) [{ "start": 0, "length": 32768, "depth": 1, "zero": true, "data": false}, { "start": 32768, "length": 4096, "depth": 0, "zero": true, "data": false}, -{ "start": 36864, "length": 4096, "depth": 0, "zero": false, "data": true, "offset": 20480}, +{ "start": 36864, "length": 4096, "depth": 0, "zero": false, "data": true, "offset": OFFSET}, { "start": 40960, "length": 8192, "depth": 1, "zero": true, "data": false}, { "start": 49152, "length": 4096, "depth": 0, "zero": true, "data": false}, -{ "start": 53248, "length": 4096, "depth": 0, "zero": false, "data": true, "offset": 24576}, +{ "start": 53248, "length": 4096, "depth": 0, "zero": false, "data": true, "offset": OFFSET}, { "start": 57344, "length": 8192, "depth": 1, "zero": true, "data": false}, { "start": 65536, "length": 4096, "depth": 0, "zero": true, "data": false}, -{ "start": 69632, "length": 4096, "depth": 0, "zero": false, "data": true, "offset": 28672}, +{ "start": 69632, "length": 4096, "depth": 0, "zero": false, "data": true, "offset": OFFSET}, { "start": 73728, "length": 134144000, "depth": 1, "zero": true, "data": false}] == spanning two clusters, partially overwriting backing file == @@ -XXX,XX +XXX,XX @@ read 1024/1024 bytes at offset 5120 1 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec) read 2048/2048 bytes at offset 6144 2 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec) -[{ "start": 0, "length": 8192, "depth": 0, "zero": false, "data": true, "offset": 20480}, +[{ "start": 0, "length": 8192, "depth": 0, "zero": false, "data": true, "offset": OFFSET}, { "start": 8192, "length": 134209536, "depth": 1, "zero": true, "data": false}] == spanning multiple clusters, non-zero in first cluster == @@ -XXX,XX +XXX,XX @@ read 2048/2048 bytes at offset 65536 read 10240/10240 bytes at offset 67584 10 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec) [{ "start": 0, "length": 65536, "depth": 1, "zero": true, "data": false}, -{ "start": 65536, "length": 4096, "depth": 0, "zero": false, "data": true, "offset": 20480}, +{ "start": 65536, "length": 4096, "depth": 0, "zero": false, "data": true, "offset": OFFSET}, { "start": 69632, "length": 8192, "depth": 0, "zero": true, "data": false}, { "start": 77824, "length": 134139904, "depth": 1, "zero": true, "data": false}] @@ -XXX,XX +XXX,XX @@ read 2048/2048 bytes at offset 75776 2 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec) [{ "start": 0, "length": 65536, "depth": 1, "zero": true, "data": false}, { "start": 65536, "length": 8192, "depth": 0, "zero": true, "data": false}, -{ "start": 73728, "length": 4096, "depth": 0, "zero": false, "data": true, "offset": 20480}, +{ "start": 73728, "length": 4096, "depth": 0, "zero": false, "data": true, "offset": OFFSET}, { "start": 77824, "length": 134139904, "depth": 1, "zero": true, "data": false}] == spanning multiple clusters, partially overwriting backing file == @@ -XXX,XX +XXX,XX @@ read 2048/2048 bytes at offset 74752 read 1024/1024 bytes at offset 76800 1 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec) [{ "start": 0, "length": 65536, "depth": 1, "zero": true, "data": false}, -{ "start": 65536, "length": 4096, "depth": 0, "zero": false, "data": true, "offset": 20480}, +{ "start": 65536, "length": 4096, "depth": 0, "zero": false, "data": true, "offset": OFFSET}, { "start": 69632, "length": 4096, "depth": 0, "zero": true, "data": false}, -{ "start": 73728, "length": 4096, "depth": 0, "zero": false, "data": true, "offset": 24576}, +{ "start": 73728, "length": 4096, "depth": 0, "zero": false, "data": true, "offset": OFFSET}, { "start": 77824, "length": 134139904, "depth": 1, "zero": true, "data": false}] *** done diff --git a/tests/qemu-iotests/common.filter b/tests/qemu-iotests/common.filter index XXXXXXX..XXXXXXX 100644 --- a/tests/qemu-iotests/common.filter +++ b/tests/qemu-iotests/common.filter @@ -XXX,XX +XXX,XX @@ _filter_img_info() -e "/log_size: [0-9]\\+/d" } -# filter out offsets and file names from qemu-img map +# filter out offsets and file names from qemu-img map; good for both +# human and json output _filter_qemu_img_map() { sed -e 's/\([0-9a-fx]* *[0-9a-fx]* *\)[0-9a-fx]* */\1/g' \ + -e 's/"offset": [0-9]\+/"offset": OFFSET/g' \ -e 's/Mapped to *//' | _filter_testdir | _filter_imgfmt } -- 1.8.3.1 From: Eric Blake <eblake@redhat.com> No tests were covering write zeroes with unmap. Additionally, I needed to prove that my previous patches for correct status reporting and write zeroes optimizations actually had an impact. The test works for cluster_size between 8k and 2M (for smaller sizes, it fails because our allocation patterns are not contiguous with small clusters - in part, the largest consecutive allocation we tend to get is often bounded by the size covered by one L2 table). Note that testing for zero clusters is tricky: 'qemu-io map' reports whether data comes from the current layer of the image (useful for sniffing out which regions of the file have QCOW_OFLAG_ZERO) - but doesn't show which clusters have mappings; while 'qemu-img map' sees "zero":true for both unallocated and zero clusters for any qcow2 with no backing layer (so less useful at detecting true zero clusters), but reliably shows mappings. So we have to rely on both queries side-by-side at each point of the test. Signed-off-by: Eric Blake <eblake@redhat.com> Reviewed-by: Max Reitz <mreitz@redhat.com> Message-id: 20170507000552.20847-10-eblake@redhat.com Signed-off-by: Max Reitz <mreitz@redhat.com> --- tests/qemu-iotests/179 | 130 +++++++++++++++++++++++++++++++++++++ tests/qemu-iotests/179.out | 156 +++++++++++++++++++++++++++++++++++++++++++++ tests/qemu-iotests/group | 1 + 3 files changed, 287 insertions(+) create mode 100755 tests/qemu-iotests/179 create mode 100644 tests/qemu-iotests/179.out diff --git a/tests/qemu-iotests/179 b/tests/qemu-iotests/179 new file mode 100755 index XXXXXXX..XXXXXXX --- /dev/null +++ b/tests/qemu-iotests/179 @@ -XXX,XX +XXX,XX @@ +#!/bin/bash +# +# Test case for write zeroes with unmap +# +# Copyright (C) 2017 Red Hat, Inc. +# +# This program is free software; you can redistribute it and/or modify +# it under the terms of the GNU General Public License as published by +# the Free Software Foundation; either version 2 of the License, or +# (at your option) any later version. +# +# This program is distributed in the hope that it will be useful, +# but WITHOUT ANY WARRANTY; without even the implied warranty of +# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +# GNU General Public License for more details. +# +# You should have received a copy of the GNU General Public License +# along with this program. If not, see <http://www.gnu.org/licenses/>. +# + +# creator +owner=eblake@redhat.com + +seq="$(basename $0)" +echo "QA output created by $seq" + +here="$PWD" +status=1 # failure is the default! + +_cleanup() +{ + _cleanup_test_img +} +trap "_cleanup; exit \$status" 0 1 2 3 15 + +# get standard environment, filters and checks +. ./common.rc +. ./common.filter + +_supported_fmt qcow2 +_supported_proto file +_supported_os Linux + +# v2 images can't mark clusters as zero +_unsupported_imgopts compat=0.10 + +echo +echo '=== Testing write zeroes with unmap ===' +echo + +TEST_IMG="$TEST_IMG.base" _make_test_img 64M +_make_test_img -b "$TEST_IMG.base" + +# Offsets chosen at or near 2M boundaries so test works at all cluster sizes +# 8k and larger (smaller clusters fail due to non-contiguous allocations) + +# Aligned writes to unallocated cluster should not allocate mapping, but must +# mark cluster as zero, whether or not unmap was requested +$QEMU_IO -c "write -z -u 2M 2M" "$TEST_IMG.base" | _filter_qemu_io +$QEMU_IO -c "write -z 6M 2M" "$TEST_IMG.base" | _filter_qemu_io +$QEMU_IO -c "map" "$TEST_IMG.base" | _filter_qemu_io +$QEMU_IMG map --output=json "$TEST_IMG.base" | _filter_qemu_img_map + +# Unaligned writes need not allocate mapping if the cluster already reads +# as zero, but must mark cluster as zero, whether or not unmap was requested +$QEMU_IO -c "write -z -u 10485761 2097150" "$TEST_IMG.base" | _filter_qemu_io +$QEMU_IO -c "write -z 14680065 2097150" "$TEST_IMG.base" | _filter_qemu_io +$QEMU_IO -c "map" "$TEST_IMG.base" | _filter_qemu_io +$QEMU_IMG map --output=json "$TEST_IMG.base" | _filter_qemu_img_map + +# Requesting unmap of normal data must deallocate; omitting unmap should +# preserve the mapping +$QEMU_IO -c "write 18M 14M" "$TEST_IMG.base" | _filter_qemu_io +$QEMU_IO -c "write -z -u 20M 2M" "$TEST_IMG.base" | _filter_qemu_io +$QEMU_IO -c "write -z 24M 6M" "$TEST_IMG.base" | _filter_qemu_io +$QEMU_IO -c "map" "$TEST_IMG.base" | _filter_qemu_io +$QEMU_IMG map --output=json "$TEST_IMG.base" | _filter_qemu_img_map + +# Likewise when writing on already-mapped zero data +$QEMU_IO -c "write -z -u 26M 2M" "$TEST_IMG.base" | _filter_qemu_io +$QEMU_IO -c "write -z 28M 2M" "$TEST_IMG.base" | _filter_qemu_io +$QEMU_IO -c "map" "$TEST_IMG.base" | _filter_qemu_io +$QEMU_IMG map --output=json "$TEST_IMG.base" | _filter_qemu_img_map + +# Writing on unmapped zeroes does not allocate +$QEMU_IO -c "write -z 32M 8M" "$TEST_IMG.base" | _filter_qemu_io +$QEMU_IO -c "write -z -u 34M 2M" "$TEST_IMG.base" | _filter_qemu_io +$QEMU_IO -c "write -z 36M 2M" "$TEST_IMG.base" | _filter_qemu_io +$QEMU_IO -c "map" "$TEST_IMG.base" | _filter_qemu_io +$QEMU_IMG map --output=json "$TEST_IMG.base" | _filter_qemu_img_map + +# Writing zero overrides a backing file, regardless of backing cluster type +$QEMU_IO -c "write -z 40M 8M" "$TEST_IMG.base" | _filter_qemu_io +$QEMU_IO -c "write 48M 8M" "$TEST_IMG.base" | _filter_qemu_io +$QEMU_IO -c "write -z -u 42M 2M" "$TEST_IMG" | _filter_qemu_io +$QEMU_IO -c "write -z 44M 2M" "$TEST_IMG" | _filter_qemu_io +$QEMU_IO -c "write -z -u 50M 2M" "$TEST_IMG" | _filter_qemu_io +$QEMU_IO -c "write -z 52M 2M" "$TEST_IMG" | _filter_qemu_io +$QEMU_IO -c "write -z -u 58M 2M" "$TEST_IMG" | _filter_qemu_io +$QEMU_IO -c "write -z 60M 2M" "$TEST_IMG" | _filter_qemu_io +$QEMU_IO -c "map" "$TEST_IMG" | _filter_qemu_io +$QEMU_IMG map --output=json "$TEST_IMG" | _filter_qemu_img_map + +# Final check that mappings are correct and images are still sane +TEST_IMG="$TEST_IMG.base" _check_test_img +_check_test_img + +echo +echo '=== Testing cache optimization ===' +echo + +BLKDBG_TEST_IMG="blkdebug:$TEST_DIR/blkdebug.conf:$TEST_IMG.base" + +cat > "$TEST_DIR/blkdebug.conf" <<EOF +[inject-error] +event = "l2_update" +errno = "5" +immediately = "on" +once = "off" +EOF + +# None of the following writes should trigger an L2 update, because the +# cluster already reads as zero, and we don't have to change allocation +$QEMU_IO -c "w -z -u 20M 2M" "$BLKDBG_TEST_IMG" | _filter_qemu_io +$QEMU_IO -c "w -z 20M 2M" "$BLKDBG_TEST_IMG" | _filter_qemu_io +$QEMU_IO -c "w -z 28M 2M" "$BLKDBG_TEST_IMG" | _filter_qemu_io + +# success, all done +echo '*** done' +status=0 diff --git a/tests/qemu-iotests/179.out b/tests/qemu-iotests/179.out new file mode 100644 index XXXXXXX..XXXXXXX --- /dev/null +++ b/tests/qemu-iotests/179.out @@ -XXX,XX +XXX,XX @@ +QA output created by 179 + +=== Testing write zeroes with unmap === + +Formatting 'TEST_DIR/t.IMGFMT.base', fmt=IMGFMT size=67108864 +Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=67108864 backing_file=TEST_DIR/t.IMGFMT.base +wrote 2097152/2097152 bytes at offset 2097152 +2 MiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec) +wrote 2097152/2097152 bytes at offset 6291456 +2 MiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec) +2 MiB (0x200000) bytes not allocated at offset 0 bytes (0x0) +2 MiB (0x200000) bytes allocated at offset 2 MiB (0x200000) +2 MiB (0x200000) bytes not allocated at offset 4 MiB (0x400000) +2 MiB (0x200000) bytes allocated at offset 6 MiB (0x600000) +56 MiB (0x3800000) bytes not allocated at offset 8 MiB (0x800000) +[{ "start": 0, "length": 67108864, "depth": 0, "zero": true, "data": false}] +wrote 2097150/2097150 bytes at offset 10485761 +2 MiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec) +wrote 2097150/2097150 bytes at offset 14680065 +2 MiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec) +2 MiB (0x200000) bytes not allocated at offset 0 bytes (0x0) +2 MiB (0x200000) bytes allocated at offset 2 MiB (0x200000) +2 MiB (0x200000) bytes not allocated at offset 4 MiB (0x400000) +2 MiB (0x200000) bytes allocated at offset 6 MiB (0x600000) +2 MiB (0x200000) bytes not allocated at offset 8 MiB (0x800000) +2 MiB (0x200000) bytes allocated at offset 10 MiB (0xa00000) +2 MiB (0x200000) bytes not allocated at offset 12 MiB (0xc00000) +2 MiB (0x200000) bytes allocated at offset 14 MiB (0xe00000) +48 MiB (0x3000000) bytes not allocated at offset 16 MiB (0x1000000) +[{ "start": 0, "length": 67108864, "depth": 0, "zero": true, "data": false}] +wrote 14680064/14680064 bytes at offset 18874368 +14 MiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec) +wrote 2097152/2097152 bytes at offset 20971520 +2 MiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec) +wrote 6291456/6291456 bytes at offset 25165824 +6 MiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec) +2 MiB (0x200000) bytes not allocated at offset 0 bytes (0x0) +2 MiB (0x200000) bytes allocated at offset 2 MiB (0x200000) +2 MiB (0x200000) bytes not allocated at offset 4 MiB (0x400000) +2 MiB (0x200000) bytes allocated at offset 6 MiB (0x600000) +2 MiB (0x200000) bytes not allocated at offset 8 MiB (0x800000) +2 MiB (0x200000) bytes allocated at offset 10 MiB (0xa00000) +2 MiB (0x200000) bytes not allocated at offset 12 MiB (0xc00000) +2 MiB (0x200000) bytes allocated at offset 14 MiB (0xe00000) +2 MiB (0x200000) bytes not allocated at offset 16 MiB (0x1000000) +14 MiB (0xe00000) bytes allocated at offset 18 MiB (0x1200000) +32 MiB (0x2000000) bytes not allocated at offset 32 MiB (0x2000000) +[{ "start": 0, "length": 18874368, "depth": 0, "zero": true, "data": false}, +{ "start": 18874368, "length": 2097152, "depth": 0, "zero": false, "data": true, "offset": OFFSET}, +{ "start": 20971520, "length": 2097152, "depth": 0, "zero": true, "data": false}, +{ "start": 23068672, "length": 2097152, "depth": 0, "zero": false, "data": true, "offset": OFFSET}, +{ "start": 25165824, "length": 6291456, "depth": 0, "zero": true, "data": false, "offset": OFFSET}, +{ "start": 31457280, "length": 2097152, "depth": 0, "zero": false, "data": true, "offset": OFFSET}, +{ "start": 33554432, "length": 33554432, "depth": 0, "zero": true, "data": false}] +wrote 2097152/2097152 bytes at offset 27262976 +2 MiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec) +wrote 2097152/2097152 bytes at offset 29360128 +2 MiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec) +2 MiB (0x200000) bytes not allocated at offset 0 bytes (0x0) +2 MiB (0x200000) bytes allocated at offset 2 MiB (0x200000) +2 MiB (0x200000) bytes not allocated at offset 4 MiB (0x400000) +2 MiB (0x200000) bytes allocated at offset 6 MiB (0x600000) +2 MiB (0x200000) bytes not allocated at offset 8 MiB (0x800000) +2 MiB (0x200000) bytes allocated at offset 10 MiB (0xa00000) +2 MiB (0x200000) bytes not allocated at offset 12 MiB (0xc00000) +2 MiB (0x200000) bytes allocated at offset 14 MiB (0xe00000) +2 MiB (0x200000) bytes not allocated at offset 16 MiB (0x1000000) +14 MiB (0xe00000) bytes allocated at offset 18 MiB (0x1200000) +32 MiB (0x2000000) bytes not allocated at offset 32 MiB (0x2000000) +[{ "start": 0, "length": 18874368, "depth": 0, "zero": true, "data": false}, +{ "start": 18874368, "length": 2097152, "depth": 0, "zero": false, "data": true, "offset": OFFSET}, +{ "start": 20971520, "length": 2097152, "depth": 0, "zero": true, "data": false}, +{ "start": 23068672, "length": 2097152, "depth": 0, "zero": false, "data": true, "offset": OFFSET}, +{ "start": 25165824, "length": 2097152, "depth": 0, "zero": true, "data": false, "offset": OFFSET}, +{ "start": 27262976, "length": 2097152, "depth": 0, "zero": true, "data": false}, +{ "start": 29360128, "length": 2097152, "depth": 0, "zero": true, "data": false, "offset": OFFSET}, +{ "start": 31457280, "length": 2097152, "depth": 0, "zero": false, "data": true, "offset": OFFSET}, +{ "start": 33554432, "length": 33554432, "depth": 0, "zero": true, "data": false}] +wrote 8388608/8388608 bytes at offset 33554432 +8 MiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec) +wrote 2097152/2097152 bytes at offset 35651584 +2 MiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec) +wrote 2097152/2097152 bytes at offset 37748736 +2 MiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec) +2 MiB (0x200000) bytes not allocated at offset 0 bytes (0x0) +2 MiB (0x200000) bytes allocated at offset 2 MiB (0x200000) +2 MiB (0x200000) bytes not allocated at offset 4 MiB (0x400000) +2 MiB (0x200000) bytes allocated at offset 6 MiB (0x600000) +2 MiB (0x200000) bytes not allocated at offset 8 MiB (0x800000) +2 MiB (0x200000) bytes allocated at offset 10 MiB (0xa00000) +2 MiB (0x200000) bytes not allocated at offset 12 MiB (0xc00000) +2 MiB (0x200000) bytes allocated at offset 14 MiB (0xe00000) +2 MiB (0x200000) bytes not allocated at offset 16 MiB (0x1000000) +22 MiB (0x1600000) bytes allocated at offset 18 MiB (0x1200000) +24 MiB (0x1800000) bytes not allocated at offset 40 MiB (0x2800000) +[{ "start": 0, "length": 18874368, "depth": 0, "zero": true, "data": false}, +{ "start": 18874368, "length": 2097152, "depth": 0, "zero": false, "data": true, "offset": OFFSET}, +{ "start": 20971520, "length": 2097152, "depth": 0, "zero": true, "data": false}, +{ "start": 23068672, "length": 2097152, "depth": 0, "zero": false, "data": true, "offset": OFFSET}, +{ "start": 25165824, "length": 2097152, "depth": 0, "zero": true, "data": false, "offset": OFFSET}, +{ "start": 27262976, "length": 2097152, "depth": 0, "zero": true, "data": false}, +{ "start": 29360128, "length": 2097152, "depth": 0, "zero": true, "data": false, "offset": OFFSET}, +{ "start": 31457280, "length": 2097152, "depth": 0, "zero": false, "data": true, "offset": OFFSET}, +{ "start": 33554432, "length": 33554432, "depth": 0, "zero": true, "data": false}] +wrote 8388608/8388608 bytes at offset 41943040 +8 MiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec) +wrote 8388608/8388608 bytes at offset 50331648 +8 MiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec) +wrote 2097152/2097152 bytes at offset 44040192 +2 MiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec) +wrote 2097152/2097152 bytes at offset 46137344 +2 MiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec) +wrote 2097152/2097152 bytes at offset 52428800 +2 MiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec) +wrote 2097152/2097152 bytes at offset 54525952 +2 MiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec) +wrote 2097152/2097152 bytes at offset 60817408 +2 MiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec) +wrote 2097152/2097152 bytes at offset 62914560 +2 MiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec) +42 MiB (0x2a00000) bytes not allocated at offset 0 bytes (0x0) +4 MiB (0x400000) bytes allocated at offset 42 MiB (0x2a00000) +4 MiB (0x400000) bytes not allocated at offset 46 MiB (0x2e00000) +4 MiB (0x400000) bytes allocated at offset 50 MiB (0x3200000) +4 MiB (0x400000) bytes not allocated at offset 54 MiB (0x3600000) +4 MiB (0x400000) bytes allocated at offset 58 MiB (0x3a00000) +2 MiB (0x200000) bytes not allocated at offset 62 MiB (0x3e00000) +[{ "start": 0, "length": 18874368, "depth": 1, "zero": true, "data": false}, +{ "start": 18874368, "length": 2097152, "depth": 1, "zero": false, "data": true, "offset": OFFSET}, +{ "start": 20971520, "length": 2097152, "depth": 1, "zero": true, "data": false}, +{ "start": 23068672, "length": 2097152, "depth": 1, "zero": false, "data": true, "offset": OFFSET}, +{ "start": 25165824, "length": 2097152, "depth": 1, "zero": true, "data": false, "offset": OFFSET}, +{ "start": 27262976, "length": 2097152, "depth": 1, "zero": true, "data": false}, +{ "start": 29360128, "length": 2097152, "depth": 1, "zero": true, "data": false, "offset": OFFSET}, +{ "start": 31457280, "length": 2097152, "depth": 1, "zero": false, "data": true, "offset": OFFSET}, +{ "start": 33554432, "length": 10485760, "depth": 1, "zero": true, "data": false}, +{ "start": 44040192, "length": 4194304, "depth": 0, "zero": true, "data": false}, +{ "start": 48234496, "length": 2097152, "depth": 1, "zero": true, "data": false}, +{ "start": 50331648, "length": 2097152, "depth": 1, "zero": false, "data": true, "offset": OFFSET}, +{ "start": 52428800, "length": 4194304, "depth": 0, "zero": true, "data": false}, +{ "start": 56623104, "length": 2097152, "depth": 1, "zero": false, "data": true, "offset": OFFSET}, +{ "start": 58720256, "length": 2097152, "depth": 1, "zero": true, "data": false}, +{ "start": 60817408, "length": 4194304, "depth": 0, "zero": true, "data": false}, +{ "start": 65011712, "length": 2097152, "depth": 1, "zero": true, "data": false}] +No errors were found on the image. +No errors were found on the image. + +=== Testing cache optimization === + +wrote 2097152/2097152 bytes at offset 20971520 +2 MiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec) +wrote 2097152/2097152 bytes at offset 20971520 +2 MiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec) +wrote 2097152/2097152 bytes at offset 29360128 +2 MiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec) +*** done diff --git a/tests/qemu-iotests/group b/tests/qemu-iotests/group index XXXXXXX..XXXXXXX 100644 --- a/tests/qemu-iotests/group +++ b/tests/qemu-iotests/group @@ -XXX,XX +XXX,XX @@ 175 auto quick 176 rw auto backing 177 rw auto quick +179 rw auto quick 181 rw auto migration 182 rw auto quick -- 1.8.3.1 From: Eric Blake <eblake@redhat.com> We've already improved discards to operate efficiently on the tail of an unaligned qcow2 image; it's time to make a similar improvement to write zeroes. The special case is only valid at the tail cluster of a file, where we must recognize that any sectors beyond the image end would implicitly read as zero, and therefore should not penalize our logic for widening a partial cluster into writing the whole cluster as zero. However, note that for now, the special case of end-of-file is only recognized if there is no backing file, or if the backing file has the same length; that's because when the backing file is shorter than the active layer, we don't have code in place to recognize that reads of a sector unallocated at the top and beyond the backing end-of-file are implicitly zero. It's not much of a real loss, because most people don't use images that aren't cluster-aligned, or where the active layer is a different size than the backing layer (especially where the difference falls within a single cluster). Update test 154 to cover the new scenarios, using two images of intentionally differing length. While at it, fix the test to gracefully skip when run as ./check -qcow2 -o compat=0.10 154 since the older format lacks zero clusters already required earlier in the test. Signed-off-by: Eric Blake <eblake@redhat.com> Reviewed-by: Max Reitz <mreitz@redhat.com> Message-id: 20170507000552.20847-11-eblake@redhat.com Signed-off-by: Max Reitz <mreitz@redhat.com> --- block/qcow2.c | 7 ++ tests/qemu-iotests/154 | 160 ++++++++++++++++++++++++++++++++++++++++++++- tests/qemu-iotests/154.out | 128 ++++++++++++++++++++++++++++++++++++ 3 files changed, 293 insertions(+), 2 deletions(-) diff --git a/block/qcow2.c b/block/qcow2.c index XXXXXXX..XXXXXXX 100644 --- a/block/qcow2.c +++ b/block/qcow2.c @@ -XXX,XX +XXX,XX @@ static bool is_zero_sectors(BlockDriverState *bs, int64_t start, BlockDriverState *file; int64_t res; + if (start + count > bs->total_sectors) { + count = bs->total_sectors - start; + } + if (!count) { return true; } @@ -XXX,XX +XXX,XX @@ static coroutine_fn int qcow2_co_pwrite_zeroes(BlockDriverState *bs, uint32_t tail = (offset + count) % s->cluster_size; trace_qcow2_pwrite_zeroes_start_req(qemu_coroutine_self(), offset, count); + if (offset + count == bs->total_sectors * BDRV_SECTOR_SIZE) { + tail = 0; + } if (head || tail) { int64_t cl_start = (offset - head) >> BDRV_SECTOR_BITS; diff --git a/tests/qemu-iotests/154 b/tests/qemu-iotests/154 index XXXXXXX..XXXXXXX 100755 --- a/tests/qemu-iotests/154 +++ b/tests/qemu-iotests/154 @@ -XXX,XX +XXX,XX @@ # # qcow2 specific bdrv_pwrite_zeroes tests with backing files (complements 034) # -# Copyright (C) 2016 Red Hat, Inc. +# Copyright (C) 2016-2017 Red Hat, Inc. # # This program is free software; you can redistribute it and/or modify # it under the terms of the GNU General Public License as published by @@ -XXX,XX +XXX,XX @@ _supported_proto file _supported_os Linux CLUSTER_SIZE=4k -size=128M +size=$((128 * 1024 * 1024)) + +# This test requires zero clusters, added in v3 images +_unsupported_imgopts compat=0.10 echo echo == backing file contains zeros == @@ -XXX,XX +XXX,XX @@ $QEMU_IO -c "read -P 0 75k 1k" "$TEST_IMG" | _filter_qemu_io $QEMU_IMG map --output=json "$TEST_IMG" | _filter_qemu_img_map +echo +echo == unaligned image tail cluster, no allocation needed == + +# With no backing file, write to all or part of unallocated partial cluster +# will mark the cluster as zero, but does not allocate. +# Re-create the image each time to get back to unallocated clusters. + +# Write at the front: sector-wise, the request is: 128m... | 00 -- -- -- +_make_test_img $((size + 2048)) +$QEMU_IO -c "write -z $size 512" "$TEST_IMG" | _filter_qemu_io +$QEMU_IO -c "alloc $size 2048" "$TEST_IMG" | _filter_qemu_io +$QEMU_IMG map --output=json "$TEST_IMG" | _filter_qemu_img_map + +# Write at the back: sector-wise, the request is: 128m... | -- -- -- 00 +_make_test_img $((size + 2048)) +$QEMU_IO -c "write -z $((size + 1536)) 512" "$TEST_IMG" | _filter_qemu_io +$QEMU_IO -c "alloc $size 2048" "$TEST_IMG" | _filter_qemu_io +$QEMU_IMG map --output=json "$TEST_IMG" | _filter_qemu_img_map + +# Write at middle: sector-wise, the request is: 128m... | -- 00 00 -- +_make_test_img $((size + 2048)) +$QEMU_IO -c "write -z $((size + 512)) 1024" "$TEST_IMG" | _filter_qemu_io +$QEMU_IO -c "alloc $size 2048" "$TEST_IMG" | _filter_qemu_io +$QEMU_IMG map --output=json "$TEST_IMG" | _filter_qemu_img_map + +# Write entire cluster: sector-wise, the request is: 128m... | 00 00 00 00 +_make_test_img $((size + 2048)) +$QEMU_IO -c "write -z $size 2048" "$TEST_IMG" | _filter_qemu_io +$QEMU_IO -c "alloc $size 2048" "$TEST_IMG" | _filter_qemu_io +$QEMU_IMG map --output=json "$TEST_IMG" | _filter_qemu_img_map + +# Repeat with backing file holding unallocated cluster. +# TODO: Note that this forces an allocation, because we aren't yet able to +# quickly detect that reads beyond EOF of the backing file are always zero +CLUSTER_SIZE=2048 TEST_IMG="$TEST_IMG.base" _make_test_img $((size + 1024)) + +# Write at the front: sector-wise, the request is: +# backing: 128m... | -- -- +# active: 128m... | 00 -- -- -- +_make_test_img -b "$TEST_IMG.base" $((size + 2048)) +$QEMU_IO -c "write -z $size 512" "$TEST_IMG" | _filter_qemu_io +$QEMU_IO -c "alloc $size 2048" "$TEST_IMG" | _filter_qemu_io +$QEMU_IMG map --output=json "$TEST_IMG" | _filter_qemu_img_map + +# Write at the back: sector-wise, the request is: +# backing: 128m... | -- -- +# active: 128m... | -- -- -- 00 +_make_test_img -b "$TEST_IMG.base" $((size + 2048)) +$QEMU_IO -c "write -z $((size + 1536)) 512" "$TEST_IMG" | _filter_qemu_io +$QEMU_IO -c "alloc $size 2048" "$TEST_IMG" | _filter_qemu_io +$QEMU_IMG map --output=json "$TEST_IMG" | _filter_qemu_img_map + +# Write at middle: sector-wise, the request is: +# backing: 128m... | -- -- +# active: 128m... | -- 00 00 -- +_make_test_img -b "$TEST_IMG.base" $((size + 2048)) +$QEMU_IO -c "write -z $((size + 512)) 1024" "$TEST_IMG" | _filter_qemu_io +$QEMU_IO -c "alloc $size 2048" "$TEST_IMG" | _filter_qemu_io +$QEMU_IMG map --output=json "$TEST_IMG" | _filter_qemu_img_map + +# Write entire cluster: sector-wise, the request is: +# backing: 128m... | -- -- +# active: 128m... | 00 00 00 00 +_make_test_img -b "$TEST_IMG.base" $((size + 2048)) +$QEMU_IO -c "write -z $size 2048" "$TEST_IMG" | _filter_qemu_io +$QEMU_IO -c "alloc $size 2048" "$TEST_IMG" | _filter_qemu_io +$QEMU_IMG map --output=json "$TEST_IMG" | _filter_qemu_img_map + +# Repeat with backing file holding zero'd cluster +# TODO: Note that this forces an allocation, because we aren't yet able to +# quickly detect that reads beyond EOF of the backing file are always zero +$QEMU_IO -c "write -z $size 512" "$TEST_IMG.base" | _filter_qemu_io + +# Write at the front: sector-wise, the request is: +# backing: 128m... | 00 00 +# active: 128m... | 00 -- -- -- +_make_test_img -b "$TEST_IMG.base" $((size + 2048)) +$QEMU_IO -c "write -z $size 512" "$TEST_IMG" | _filter_qemu_io +$QEMU_IO -c "alloc $size 2048" "$TEST_IMG" | _filter_qemu_io +$QEMU_IMG map --output=json "$TEST_IMG" | _filter_qemu_img_map + +# Write at the back: sector-wise, the request is: +# backing: 128m... | 00 00 +# active: 128m... | -- -- -- 00 +_make_test_img -b "$TEST_IMG.base" $((size + 2048)) +$QEMU_IO -c "write -z $((size + 1536)) 512" "$TEST_IMG" | _filter_qemu_io +$QEMU_IO -c "alloc $size 2048" "$TEST_IMG" | _filter_qemu_io +$QEMU_IMG map --output=json "$TEST_IMG" | _filter_qemu_img_map + +# Write at middle: sector-wise, the request is: +# backing: 128m... | 00 00 +# active: 128m... | -- 00 00 -- +_make_test_img -b "$TEST_IMG.base" $((size + 2048)) +$QEMU_IO -c "write -z $((size + 512)) 1024" "$TEST_IMG" | _filter_qemu_io +$QEMU_IO -c "alloc $size 2048" "$TEST_IMG" | _filter_qemu_io +$QEMU_IMG map --output=json "$TEST_IMG" | _filter_qemu_img_map + +# Write entire cluster: sector-wise, the request is: +# backing: 128m... | 00 00 +# active: 128m... | 00 00 00 00 +_make_test_img -b "$TEST_IMG.base" $((size + 2048)) +$QEMU_IO -c "write -z $size 2048" "$TEST_IMG" | _filter_qemu_io +$QEMU_IO -c "alloc $size 2048" "$TEST_IMG" | _filter_qemu_io +$QEMU_IMG map --output=json "$TEST_IMG" | _filter_qemu_img_map + +# A preallocated cluster maintains its allocation, whether it stays as +# data due to a partial write: +# Convert 128m... | XX XX => ... | XX 00 +_make_test_img $((size + 1024)) +$QEMU_IO -c "write -P 1 $((size)) 1024" "$TEST_IMG" | _filter_qemu_io +$QEMU_IO -c "write -z $((size + 512)) 512" "$TEST_IMG" | _filter_qemu_io +$QEMU_IO -c "read -P 1 $((size)) 512" "$TEST_IMG" | _filter_qemu_io +$QEMU_IO -c "read -P 0 $((size + 512)) 512" "$TEST_IMG" | _filter_qemu_io +$QEMU_IO -c "alloc $size 1024" "$TEST_IMG" | _filter_qemu_io +$QEMU_IMG map --output=json "$TEST_IMG" | _filter_qemu_img_map + +# or because it is the entire cluster and can use the zero flag: +# Convert 128m... | XX XX => ... | 00 00 +$QEMU_IO -c "write -z $((size)) 1024" "$TEST_IMG" | _filter_qemu_io +$QEMU_IO -c "alloc $size 1024" "$TEST_IMG" | _filter_qemu_io +$QEMU_IO -c "read -P 0 $size 1024" "$TEST_IMG" | _filter_qemu_io +$QEMU_IMG map --output=json "$TEST_IMG" | _filter_qemu_img_map + +echo +echo == unaligned image tail cluster, allocation required == + +# Write beyond backing file must COW +# Backing file: 128m... | XX -- +# Active layer: 128m... | -- -- 00 -- +CLUSTER_SIZE=512 TEST_IMG="$TEST_IMG.base" _make_test_img $((size + 1024)) +_make_test_img -b "$TEST_IMG.base" $((size + 2048)) +$QEMU_IO -c "write -P 1 $((size)) 512" "$TEST_IMG.base" | _filter_qemu_io +$QEMU_IO -c "write -z $((size + 1024)) 512" "$TEST_IMG" | _filter_qemu_io +$QEMU_IO -c "read -P 1 $((size)) 512" "$TEST_IMG" | _filter_qemu_io +$QEMU_IO -c "read -P 0 $((size + 512)) 1536" "$TEST_IMG" | _filter_qemu_io +$QEMU_IMG map --output=json "$TEST_IMG" | _filter_qemu_img_map + +# Writes at boundaries of (partial) cluster must not lose mid-cluster data +# Backing file: 128m: ... | -- XX +# Active layer: 128m: ... | 00 -- -- 00 +CLUSTER_SIZE=512 TEST_IMG="$TEST_IMG.base" _make_test_img $((size + 1024)) +_make_test_img -b "$TEST_IMG.base" $((size + 2048)) +$QEMU_IO -c "write -P 1 $((size + 512)) 512" "$TEST_IMG.base" | _filter_qemu_io +$QEMU_IO -c "write -z $((size)) 512" "$TEST_IMG" | _filter_qemu_io +$QEMU_IO -c "read -P 0 $((size)) 512" "$TEST_IMG" | _filter_qemu_io +$QEMU_IO -c "read -P 1 $((size + 512)) 512" "$TEST_IMG" | _filter_qemu_io +$QEMU_IO -c "read -P 0 $((size + 1024)) 1024" "$TEST_IMG" | _filter_qemu_io +$QEMU_IO -c "write -z $((size + 1536)) 512" "$TEST_IMG" | _filter_qemu_io +$QEMU_IO -c "read -P 0 $((size)) 512" "$TEST_IMG" | _filter_qemu_io +$QEMU_IO -c "read -P 1 $((size + 512)) 512" "$TEST_IMG" | _filter_qemu_io +$QEMU_IO -c "read -P 0 $((size + 1024)) 1024" "$TEST_IMG" | _filter_qemu_io +$QEMU_IMG map --output=json "$TEST_IMG" | _filter_qemu_img_map + # success, all done echo "*** done" rm -f $seq.full diff --git a/tests/qemu-iotests/154.out b/tests/qemu-iotests/154.out index XXXXXXX..XXXXXXX 100644 --- a/tests/qemu-iotests/154.out +++ b/tests/qemu-iotests/154.out @@ -XXX,XX +XXX,XX @@ read 1024/1024 bytes at offset 76800 { "start": 69632, "length": 4096, "depth": 0, "zero": true, "data": false}, { "start": 73728, "length": 4096, "depth": 0, "zero": false, "data": true, "offset": OFFSET}, { "start": 77824, "length": 134139904, "depth": 1, "zero": true, "data": false}] + +== unaligned image tail cluster, no allocation needed == +Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=134219776 +wrote 512/512 bytes at offset 134217728 +512 bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec) +2048/2048 bytes allocated at offset 128 MiB +[{ "start": 0, "length": 134219776, "depth": 0, "zero": true, "data": false}] +Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=134219776 +wrote 512/512 bytes at offset 134219264 +512 bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec) +2048/2048 bytes allocated at offset 128 MiB +[{ "start": 0, "length": 134219776, "depth": 0, "zero": true, "data": false}] +Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=134219776 +wrote 1024/1024 bytes at offset 134218240 +1 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec) +2048/2048 bytes allocated at offset 128 MiB +[{ "start": 0, "length": 134219776, "depth": 0, "zero": true, "data": false}] +Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=134219776 +wrote 2048/2048 bytes at offset 134217728 +2 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec) +2048/2048 bytes allocated at offset 128 MiB +[{ "start": 0, "length": 134219776, "depth": 0, "zero": true, "data": false}] +Formatting 'TEST_DIR/t.IMGFMT.base', fmt=IMGFMT size=134218752 +Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=134219776 backing_file=TEST_DIR/t.IMGFMT.base +wrote 512/512 bytes at offset 134217728 +512 bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec) +2048/2048 bytes allocated at offset 128 MiB +[{ "start": 0, "length": 134217728, "depth": 1, "zero": true, "data": false}, +{ "start": 134217728, "length": 2048, "depth": 0, "zero": false, "data": true, "offset": OFFSET}] +Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=134219776 backing_file=TEST_DIR/t.IMGFMT.base +wrote 512/512 bytes at offset 134219264 +512 bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec) +2048/2048 bytes allocated at offset 128 MiB +[{ "start": 0, "length": 134217728, "depth": 1, "zero": true, "data": false}, +{ "start": 134217728, "length": 2048, "depth": 0, "zero": false, "data": true, "offset": OFFSET}] +Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=134219776 backing_file=TEST_DIR/t.IMGFMT.base +wrote 1024/1024 bytes at offset 134218240 +1 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec) +2048/2048 bytes allocated at offset 128 MiB +[{ "start": 0, "length": 134217728, "depth": 1, "zero": true, "data": false}, +{ "start": 134217728, "length": 2048, "depth": 0, "zero": false, "data": true, "offset": OFFSET}] +Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=134219776 backing_file=TEST_DIR/t.IMGFMT.base +wrote 2048/2048 bytes at offset 134217728 +2 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec) +2048/2048 bytes allocated at offset 128 MiB +[{ "start": 0, "length": 134217728, "depth": 1, "zero": true, "data": false}, +{ "start": 134217728, "length": 2048, "depth": 0, "zero": true, "data": false}] +wrote 512/512 bytes at offset 134217728 +512 bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec) +Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=134219776 backing_file=TEST_DIR/t.IMGFMT.base +wrote 512/512 bytes at offset 134217728 +512 bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec) +2048/2048 bytes allocated at offset 128 MiB +[{ "start": 0, "length": 134217728, "depth": 1, "zero": true, "data": false}, +{ "start": 134217728, "length": 2048, "depth": 0, "zero": false, "data": true, "offset": OFFSET}] +Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=134219776 backing_file=TEST_DIR/t.IMGFMT.base +wrote 512/512 bytes at offset 134219264 +512 bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec) +2048/2048 bytes allocated at offset 128 MiB +[{ "start": 0, "length": 134217728, "depth": 1, "zero": true, "data": false}, +{ "start": 134217728, "length": 2048, "depth": 0, "zero": false, "data": true, "offset": OFFSET}] +Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=134219776 backing_file=TEST_DIR/t.IMGFMT.base +wrote 1024/1024 bytes at offset 134218240 +1 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec) +2048/2048 bytes allocated at offset 128 MiB +[{ "start": 0, "length": 134217728, "depth": 1, "zero": true, "data": false}, +{ "start": 134217728, "length": 2048, "depth": 0, "zero": false, "data": true, "offset": OFFSET}] +Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=134219776 backing_file=TEST_DIR/t.IMGFMT.base +wrote 2048/2048 bytes at offset 134217728 +2 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec) +2048/2048 bytes allocated at offset 128 MiB +[{ "start": 0, "length": 134217728, "depth": 1, "zero": true, "data": false}, +{ "start": 134217728, "length": 2048, "depth": 0, "zero": true, "data": false}] +Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=134218752 +wrote 1024/1024 bytes at offset 134217728 +1 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec) +wrote 512/512 bytes at offset 134218240 +512 bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec) +read 512/512 bytes at offset 134217728 +512 bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec) +read 512/512 bytes at offset 134218240 +512 bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec) +1024/1024 bytes allocated at offset 128 MiB +[{ "start": 0, "length": 134217728, "depth": 0, "zero": true, "data": false}, +{ "start": 134217728, "length": 1024, "depth": 0, "zero": false, "data": true, "offset": OFFSET}] +wrote 1024/1024 bytes at offset 134217728 +1 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec) +1024/1024 bytes allocated at offset 128 MiB +read 1024/1024 bytes at offset 134217728 +1 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec) +[{ "start": 0, "length": 134217728, "depth": 0, "zero": true, "data": false}, +{ "start": 134217728, "length": 1024, "depth": 0, "zero": true, "data": false, "offset": OFFSET}] + +== unaligned image tail cluster, allocation required == +Formatting 'TEST_DIR/t.IMGFMT.base', fmt=IMGFMT size=134218752 +Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=134219776 backing_file=TEST_DIR/t.IMGFMT.base +wrote 512/512 bytes at offset 134217728 +512 bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec) +wrote 512/512 bytes at offset 134218752 +512 bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec) +read 512/512 bytes at offset 134217728 +512 bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec) +read 1536/1536 bytes at offset 134218240 +1.500 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec) +[{ "start": 0, "length": 134217728, "depth": 1, "zero": true, "data": false}, +{ "start": 134217728, "length": 2048, "depth": 0, "zero": false, "data": true, "offset": OFFSET}] +Formatting 'TEST_DIR/t.IMGFMT.base', fmt=IMGFMT size=134218752 +Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=134219776 backing_file=TEST_DIR/t.IMGFMT.base +wrote 512/512 bytes at offset 134218240 +512 bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec) +wrote 512/512 bytes at offset 134217728 +512 bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec) +read 512/512 bytes at offset 134217728 +512 bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec) +read 512/512 bytes at offset 134218240 +512 bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec) +read 1024/1024 bytes at offset 134218752 +1 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec) +wrote 512/512 bytes at offset 134219264 +512 bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec) +read 512/512 bytes at offset 134217728 +512 bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec) +read 512/512 bytes at offset 134218240 +512 bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec) +read 1024/1024 bytes at offset 134218752 +1 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec) +[{ "start": 0, "length": 134217728, "depth": 1, "zero": true, "data": false}, +{ "start": 134217728, "length": 2048, "depth": 0, "zero": false, "data": true, "offset": OFFSET}] *** done -- 1.8.3.1 From: Eric Blake <eblake@redhat.com> We already audited (in commit 0c1bd469) that qcow2_discard_clusters() is only passed cluster-aligned start values; but we can further tighten the assertion that the only unaligned end value is at EOF. Recent commits have taken advantage of an unaligned tail cluster, for both discard and write zeroes. Signed-off-by: Eric Blake <eblake@redhat.com> Reviewed-by: Max Reitz <mreitz@redhat.com> Message-id: 20170507000552.20847-12-eblake@redhat.com Signed-off-by: Max Reitz <mreitz@redhat.com> --- block/qcow2-cluster.c | 15 +++++++++++---- 1 file changed, 11 insertions(+), 4 deletions(-) diff --git a/block/qcow2-cluster.c b/block/qcow2-cluster.c index XXXXXXX..XXXXXXX 100644 --- a/block/qcow2-cluster.c +++ b/block/qcow2-cluster.c @@ -XXX,XX +XXX,XX @@ int qcow2_discard_clusters(BlockDriverState *bs, uint64_t offset, end_offset = offset + (nb_sectors << BDRV_SECTOR_BITS); - /* The caller must cluster-align start; round end down except at EOF */ + /* Caller must pass aligned values, except at image end */ assert(QEMU_IS_ALIGNED(offset, s->cluster_size)); - if (end_offset != bs->total_sectors * BDRV_SECTOR_SIZE) { - end_offset = start_of_cluster(s, end_offset); - } + assert(QEMU_IS_ALIGNED(end_offset, s->cluster_size) || + end_offset == bs->total_sectors << BDRV_SECTOR_BITS); nb_clusters = size_to_clusters(s, end_offset - offset); @@ -XXX,XX +XXX,XX @@ int qcow2_zero_clusters(BlockDriverState *bs, uint64_t offset, int nb_sectors, int flags) { BDRVQcow2State *s = bs->opaque; + uint64_t end_offset; uint64_t nb_clusters; int ret; + end_offset = offset + (nb_sectors << BDRV_SECTOR_BITS); + + /* Caller must pass aligned values, except at image end */ + assert(QEMU_IS_ALIGNED(offset, s->cluster_size)); + assert(QEMU_IS_ALIGNED(end_offset, s->cluster_size) || + end_offset == bs->total_sectors << BDRV_SECTOR_BITS); + /* The zero flag is only supported by version 3 and newer */ if (s->qcow_version < 3) { return -ENOTSUP; -- 1.8.3.1 From: Eric Blake <eblake@redhat.com> Passing a byte offset, but sector count, when we ultimately want to operate on cluster granularity, is madness. Clean up the external interfaces to take both offset and count as bytes, while still keeping the assertion added previously that the caller must align the values to a cluster. Then rename things to make sure backports don't get confused by changed units: instead of qcow2_discard_clusters() and qcow2_zero_clusters(), we now have qcow2_cluster_discard() and qcow2_cluster_zeroize(). The internal functions still operate on clusters at a time, and return an int for number of cleared clusters; but on an image with 2M clusters, a single L2 table holds 256k entries that each represent a 2M cluster, totalling well over INT_MAX bytes if we ever had a request for that many bytes at once. All our callers currently limit themselves to 32-bit bytes (and therefore fewer clusters), but by making this function 64-bit clean, we have one less place to clean up if we later improve the block layer to support 64-bit bytes through all operations (with the block layer auto-fragmenting on behalf of more-limited drivers), rather than the current state where some interfaces are artificially limited to INT_MAX at a time. Signed-off-by: Eric Blake <eblake@redhat.com> Reviewed-by: Max Reitz <mreitz@redhat.com> Message-id: 20170507000552.20847-13-eblake@redhat.com Signed-off-by: Max Reitz <mreitz@redhat.com> --- block/qcow2-cluster.c | 42 ++++++++++++++++++++++-------------------- block/qcow2-snapshot.c | 7 +++---- block/qcow2.c | 22 +++++++++------------- block/qcow2.h | 9 +++++---- 4 files changed, 39 insertions(+), 41 deletions(-) diff --git a/block/qcow2-cluster.c b/block/qcow2-cluster.c index XXXXXXX..XXXXXXX 100644 --- a/block/qcow2-cluster.c +++ b/block/qcow2-cluster.c @@ -XXX,XX +XXX,XX @@ static int discard_single_l2(BlockDriverState *bs, uint64_t offset, return nb_clusters; } -int qcow2_discard_clusters(BlockDriverState *bs, uint64_t offset, - int nb_sectors, enum qcow2_discard_type type, bool full_discard) +int qcow2_cluster_discard(BlockDriverState *bs, uint64_t offset, + uint64_t bytes, enum qcow2_discard_type type, + bool full_discard) { BDRVQcow2State *s = bs->opaque; - uint64_t end_offset; + uint64_t end_offset = offset + bytes; uint64_t nb_clusters; + int64_t cleared; int ret; - end_offset = offset + (nb_sectors << BDRV_SECTOR_BITS); - /* Caller must pass aligned values, except at image end */ assert(QEMU_IS_ALIGNED(offset, s->cluster_size)); assert(QEMU_IS_ALIGNED(end_offset, s->cluster_size) || end_offset == bs->total_sectors << BDRV_SECTOR_BITS); - nb_clusters = size_to_clusters(s, end_offset - offset); + nb_clusters = size_to_clusters(s, bytes); s->cache_discards = true; /* Each L2 table is handled by its own loop iteration */ while (nb_clusters > 0) { - ret = discard_single_l2(bs, offset, nb_clusters, type, full_discard); - if (ret < 0) { + cleared = discard_single_l2(bs, offset, nb_clusters, type, + full_discard); + if (cleared < 0) { + ret = cleared; goto fail; } - nb_clusters -= ret; - offset += (ret * s->cluster_size); + nb_clusters -= cleared; + offset += (cleared * s->cluster_size); } ret = 0; @@ -XXX,XX +XXX,XX @@ static int zero_single_l2(BlockDriverState *bs, uint64_t offset, return nb_clusters; } -int qcow2_zero_clusters(BlockDriverState *bs, uint64_t offset, int nb_sectors, - int flags) +int qcow2_cluster_zeroize(BlockDriverState *bs, uint64_t offset, + uint64_t bytes, int flags) { BDRVQcow2State *s = bs->opaque; - uint64_t end_offset; + uint64_t end_offset = offset + bytes; uint64_t nb_clusters; + int64_t cleared; int ret; - end_offset = offset + (nb_sectors << BDRV_SECTOR_BITS); - /* Caller must pass aligned values, except at image end */ assert(QEMU_IS_ALIGNED(offset, s->cluster_size)); assert(QEMU_IS_ALIGNED(end_offset, s->cluster_size) || @@ -XXX,XX +XXX,XX @@ int qcow2_zero_clusters(BlockDriverState *bs, uint64_t offset, int nb_sectors, } /* Each L2 table is handled by its own loop iteration */ - nb_clusters = size_to_clusters(s, nb_sectors << BDRV_SECTOR_BITS); + nb_clusters = size_to_clusters(s, bytes); s->cache_discards = true; while (nb_clusters > 0) { - ret = zero_single_l2(bs, offset, nb_clusters, flags); - if (ret < 0) { + cleared = zero_single_l2(bs, offset, nb_clusters, flags); + if (cleared < 0) { + ret = cleared; goto fail; } - nb_clusters -= ret; - offset += (ret * s->cluster_size); + nb_clusters -= cleared; + offset += (cleared * s->cluster_size); } ret = 0; diff --git a/block/qcow2-snapshot.c b/block/qcow2-snapshot.c index XXXXXXX..XXXXXXX 100644 --- a/block/qcow2-snapshot.c +++ b/block/qcow2-snapshot.c @@ -XXX,XX +XXX,XX @@ int qcow2_snapshot_create(BlockDriverState *bs, QEMUSnapshotInfo *sn_info) /* The VM state isn't needed any more in the active L1 table; in fact, it * hurts by causing expensive COW for the next snapshot. */ - qcow2_discard_clusters(bs, qcow2_vm_state_offset(s), - align_offset(sn->vm_state_size, s->cluster_size) - >> BDRV_SECTOR_BITS, - QCOW2_DISCARD_NEVER, false); + qcow2_cluster_discard(bs, qcow2_vm_state_offset(s), + align_offset(sn->vm_state_size, s->cluster_size), + QCOW2_DISCARD_NEVER, false); #ifdef DEBUG_ALLOC { diff --git a/block/qcow2.c b/block/qcow2.c index XXXXXXX..XXXXXXX 100644 --- a/block/qcow2.c +++ b/block/qcow2.c @@ -XXX,XX +XXX,XX @@ static coroutine_fn int qcow2_co_pwrite_zeroes(BlockDriverState *bs, trace_qcow2_pwrite_zeroes(qemu_coroutine_self(), offset, count); /* Whatever is left can use real zero clusters */ - ret = qcow2_zero_clusters(bs, offset, count >> BDRV_SECTOR_BITS, flags); + ret = qcow2_cluster_zeroize(bs, offset, count, flags); qemu_co_mutex_unlock(&s->lock); return ret; @@ -XXX,XX +XXX,XX @@ static coroutine_fn int qcow2_co_pdiscard(BlockDriverState *bs, } qemu_co_mutex_lock(&s->lock); - ret = qcow2_discard_clusters(bs, offset, count >> BDRV_SECTOR_BITS, - QCOW2_DISCARD_REQUEST, false); + ret = qcow2_cluster_discard(bs, offset, count, QCOW2_DISCARD_REQUEST, + false); qemu_co_mutex_unlock(&s->lock); return ret; } @@ -XXX,XX +XXX,XX @@ fail: static int qcow2_make_empty(BlockDriverState *bs) { BDRVQcow2State *s = bs->opaque; - uint64_t start_sector; - int sector_step = (QEMU_ALIGN_DOWN(INT_MAX, s->cluster_size) / - BDRV_SECTOR_SIZE); + uint64_t offset, end_offset; + int step = QEMU_ALIGN_DOWN(INT_MAX, s->cluster_size); int l1_clusters, ret = 0; l1_clusters = DIV_ROUND_UP(s->l1_size, s->cluster_size / sizeof(uint64_t)); @@ -XXX,XX +XXX,XX @@ static int qcow2_make_empty(BlockDriverState *bs) /* This fallback code simply discards every active cluster; this is slow, * but works in all cases */ - for (start_sector = 0; start_sector < bs->total_sectors; - start_sector += sector_step) - { + end_offset = bs->total_sectors * BDRV_SECTOR_SIZE; + for (offset = 0; offset < end_offset; offset += step) { /* As this function is generally used after committing an external * snapshot, QCOW2_DISCARD_SNAPSHOT seems appropriate. Also, the * default action for this kind of discard is to pass the discard, * which will ideally result in an actually smaller image file, as * is probably desired. */ - ret = qcow2_discard_clusters(bs, start_sector * BDRV_SECTOR_SIZE, - MIN(sector_step, - bs->total_sectors - start_sector), - QCOW2_DISCARD_SNAPSHOT, true); + ret = qcow2_cluster_discard(bs, offset, MIN(step, end_offset - offset), + QCOW2_DISCARD_SNAPSHOT, true); if (ret < 0) { break; } diff --git a/block/qcow2.h b/block/qcow2.h index XXXXXXX..XXXXXXX 100644 --- a/block/qcow2.h +++ b/block/qcow2.h @@ -XXX,XX +XXX,XX @@ uint64_t qcow2_alloc_compressed_cluster_offset(BlockDriverState *bs, int compressed_size); int qcow2_alloc_cluster_link_l2(BlockDriverState *bs, QCowL2Meta *m); -int qcow2_discard_clusters(BlockDriverState *bs, uint64_t offset, - int nb_sectors, enum qcow2_discard_type type, bool full_discard); -int qcow2_zero_clusters(BlockDriverState *bs, uint64_t offset, int nb_sectors, - int flags); +int qcow2_cluster_discard(BlockDriverState *bs, uint64_t offset, + uint64_t bytes, enum qcow2_discard_type type, + bool full_discard); +int qcow2_cluster_zeroize(BlockDriverState *bs, uint64_t offset, + uint64_t bytes, int flags); int qcow2_expand_zero_clusters(BlockDriverState *bs, BlockDriverAmendStatusCB *status_cb, -- 1.8.3.1 From: Max Reitz <mreitz@redhat.com> util/qemu-progress.c is currently unmaintained. The only user of its functionality is qemu-img, so it effectively is part of the block layer. Suggested-by: Fam Zheng <famz@redhat.com> Signed-off-by: Max Reitz <mreitz@redhat.com> Message-id: 20170428165517.30341-1-mreitz@redhat.com Reviewed-by: Eric Blake <eblake@redhat.com> Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com> Signed-off-by: Max Reitz <mreitz@redhat.com> --- MAINTAINERS | 1 + 1 file changed, 1 insertion(+) diff --git a/MAINTAINERS b/MAINTAINERS index XXXXXXX..XXXXXXX 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -XXX,XX +XXX,XX @@ F: include/block/ F: qemu-img* F: qemu-io* F: tests/qemu-iotests/ +F: util/qemu-progress.c T: git git://repo.or.cz/qemu/kevin.git block Block I/O path -- 1.8.3.1 The following changes since commit 16aaacb307ed607b9780c12702c44f0fe52edc7e: Merge remote-tracking branch 'remotes/cohuck/tags/s390x-20200430' into staging (2020-04-30 14:00:36 +0100) are available in the Git repository at: git://repo.or.cz/qemu/kevin.git tags/for-upstream for you to fetch changes up to eaae29ef89d498d0eac553c77b554f310a47f809: qemu-storage-daemon: Fix non-string --object properties (2020-04-30 17:51:07 +0200) ---------------------------------------------------------------- Block layer patches: - Fix resize (extending) of short overlays - nvme: introduce PMR support from NVMe 1.4 spec - qemu-storage-daemon: Fix non-string --object properties ---------------------------------------------------------------- Alberto Garcia (1): qcow2: Add incompatibility note between backing files and raw external data files Andrzej Jakowski (1): nvme: introduce PMR support from NVMe 1.4 spec Kevin Wolf (12): block: Add flags to BlockDriver.bdrv_co_truncate() block: Add flags to bdrv(_co)_truncate() block-backend: Add flags to blk_truncate() qcow2: Support BDRV_REQ_ZERO_WRITE for truncate raw-format: Support BDRV_REQ_ZERO_WRITE for truncate file-posix: Support BDRV_REQ_ZERO_WRITE for truncate block: truncate: Don't make backing file data visible iotests: Filter testfiles out in filter_img_info() iotests: Test committing to short backing file qcow2: Forward ZERO_WRITE flag for full preallocation qom: Factor out user_creatable_add_dict() qemu-storage-daemon: Fix non-string --object properties Paolo Bonzini (1): qemu-iotests: allow qcow2 external discarded clusters to contain stale data docs/interop/qcow2.txt | 3 + hw/block/nvme.h | 2 + include/block/block.h | 5 +- include/block/block_int.h | 10 +- include/block/nvme.h | 172 ++++++++++++++++++++++++++ include/qom/object_interfaces.h | 16 +++ include/sysemu/block-backend.h | 2 +- block.c | 3 +- block/block-backend.c | 4 +- block/commit.c | 4 +- block/crypto.c | 7 +- block/file-posix.c | 6 +- block/file-win32.c | 2 +- block/gluster.c | 1 + block/io.c | 43 ++++++- block/iscsi.c | 2 +- block/mirror.c | 2 +- block/nfs.c | 3 +- block/parallels.c | 6 +- block/qcow.c | 4 +- block/qcow2-cluster.c | 2 +- block/qcow2-refcount.c | 2 +- block/qcow2.c | 73 +++++++++-- block/qed.c | 3 +- block/raw-format.c | 6 +- block/rbd.c | 1 + block/sheepdog.c | 4 +- block/ssh.c | 2 +- block/vdi.c | 2 +- block/vhdx-log.c | 2 +- block/vhdx.c | 6 +- block/vmdk.c | 8 +- block/vpc.c | 2 +- blockdev.c | 2 +- hw/block/nvme.c | 109 ++++++++++++++++ qemu-img.c | 2 +- qemu-io-cmds.c | 2 +- qemu-storage-daemon.c | 4 +- qom/object_interfaces.c | 31 +++++ qom/qom-qmp-cmds.c | 24 +--- tests/test-block-iothread.c | 9 +- tests/qemu-iotests/iotests.py | 5 +- hw/block/Makefile.objs | 2 +- hw/block/trace-events | 4 + tests/qemu-iotests/244 | 10 +- tests/qemu-iotests/244.out | 9 +- tests/qemu-iotests/274 | 155 +++++++++++++++++++++++ tests/qemu-iotests/274.out | 268 ++++++++++++++++++++++++++++++++++++++++ tests/qemu-iotests/group | 1 + 49 files changed, 951 insertions(+), 96 deletions(-) create mode 100755 tests/qemu-iotests/274 create mode 100644 tests/qemu-iotests/274.out From: Alberto Garcia <berto@igalia.com> Backing files and raw external data files are mutually exclusive. The documentation of the raw external data bit (in autoclear_features) already indicates that, but we should also mention it on the other side. Suggested-by: Eric Blake <eblake@redhat.com> Signed-off-by: Alberto Garcia <berto@igalia.com> Message-Id: <20200410121816.8334-1-berto@igalia.com> Reviewed-by: Eric Blake <eblake@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com> --- docs/interop/qcow2.txt | 3 +++ 1 file changed, 3 insertions(+) diff --git a/docs/interop/qcow2.txt b/docs/interop/qcow2.txt index XXXXXXX..XXXXXXX 100644 --- a/docs/interop/qcow2.txt +++ b/docs/interop/qcow2.txt @@ -XXX,XX +XXX,XX @@ The first cluster of a qcow2 image contains the file header: is stored (NB: The string is not null terminated). 0 if the image doesn't have a backing file. + Note: backing files are incompatible with raw external data + files (auto-clear feature bit 1). + 16 - 19: backing_file_size Length of the backing file name in bytes. Must not be longer than 1023 bytes. Undefined if the image doesn't have -- 2.25.3 From: Paolo Bonzini <pbonzini@redhat.com> Test 244 checks the expected behavior of qcow2 external data files with respect to zero and discarded clusters. Filesystems however are free to ignore discard requests, and this seems to be the case for overlayfs. Relax the tests to skip checks on the external data file for discarded areas, which implies not using qemu-img compare in the data_file_raw=on case. This fixes docker tests on RHEL8. Cc: Kevin Wolf <kwolf@redhat.com> Cc: qemu-block@nongnu.org Signed-off-by: Paolo Bonzini <pbonzini@redhat.com> Message-Id: <20200409191006.24429-1-pbonzini@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com> --- tests/qemu-iotests/244 | 10 ++++++++-- tests/qemu-iotests/244.out | 9 ++++++--- 2 files changed, 14 insertions(+), 5 deletions(-) diff --git a/tests/qemu-iotests/244 b/tests/qemu-iotests/244 index XXXXXXX..XXXXXXX 100755 --- a/tests/qemu-iotests/244 +++ b/tests/qemu-iotests/244 @@ -XXX,XX +XXX,XX @@ $QEMU_IO -c 'read -P 0 0 1M' \ echo $QEMU_IO -c 'read -P 0 0 1M' \ -c 'read -P 0x11 1M 1M' \ - -c 'read -P 0 2M 2M' \ -c 'read -P 0x11 4M 1M' \ -c 'read -P 0 5M 1M' \ -f raw "$TEST_IMG.data" | @@ -XXX,XX +XXX,XX @@ $QEMU_IO -c 'read -P 0 0 1M' \ -f $IMGFMT "$TEST_IMG" | _filter_qemu_io +# Discarded clusters are only marked as such in the qcow2 metadata, but +# they can contain stale data in the external data file. Instead, zero +# clusters must be zeroed in the external data file too. echo -$QEMU_IMG compare "$TEST_IMG" "$TEST_IMG.data" +$QEMU_IO -c 'read -P 0 0 1M' \ + -c 'read -P 0x11 1M 1M' \ + -c 'read -P 0 3M 3M' \ + -f raw "$TEST_IMG".data | + _filter_qemu_io echo -n "qcow2 file size after I/O: " du -b $TEST_IMG | cut -f1 diff --git a/tests/qemu-iotests/244.out b/tests/qemu-iotests/244.out index XXXXXXX..XXXXXXX 100644 --- a/tests/qemu-iotests/244.out +++ b/tests/qemu-iotests/244.out @@ -XXX,XX +XXX,XX @@ read 1048576/1048576 bytes at offset 0 1 MiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec) read 1048576/1048576 bytes at offset 1048576 1 MiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec) -read 2097152/2097152 bytes at offset 2097152 -2 MiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec) read 1048576/1048576 bytes at offset 4194304 1 MiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec) read 1048576/1048576 bytes at offset 5242880 @@ -XXX,XX +XXX,XX @@ read 1048576/1048576 bytes at offset 1048576 read 4194304/4194304 bytes at offset 2097152 4 MiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec) -Images are identical. +read 1048576/1048576 bytes at offset 0 +1 MiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec) +read 1048576/1048576 bytes at offset 1048576 +1 MiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec) +read 3145728/3145728 bytes at offset 3145728 +3 MiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec) qcow2 file size after I/O: 327680 === bdrv_co_block_status test for file and offset=0 === -- 2.25.3 This adds a new BdrvRequestFlags parameter to the .bdrv_co_truncate() driver callbacks, and a supported_truncate_flags field in BlockDriverState that allows drivers to advertise support for request flags in the context of truncate. For now, we always pass 0 and no drivers declare support for any flag. Signed-off-by: Kevin Wolf <kwolf@redhat.com> Reviewed-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com> Reviewed-by: Alberto Garcia <berto@igalia.com> Reviewed-by: Max Reitz <mreitz@redhat.com> Message-Id: <20200424125448.63318-2-kwolf@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com> --- include/block/block_int.h | 10 +++++++++- block/crypto.c | 3 ++- block/file-posix.c | 2 +- block/file-win32.c | 2 +- block/gluster.c | 1 + block/io.c | 8 +++++++- block/iscsi.c | 2 +- block/nfs.c | 3 ++- block/qcow2.c | 2 +- block/qed.c | 1 + block/raw-format.c | 2 +- block/rbd.c | 1 + block/sheepdog.c | 4 ++-- block/ssh.c | 2 +- tests/test-block-iothread.c | 3 ++- 15 files changed, 33 insertions(+), 13 deletions(-) diff --git a/include/block/block_int.h b/include/block/block_int.h index XXXXXXX..XXXXXXX 100644 --- a/include/block/block_int.h +++ b/include/block/block_int.h @@ -XXX,XX +XXX,XX @@ struct BlockDriver { */ int coroutine_fn (*bdrv_co_truncate)(BlockDriverState *bs, int64_t offset, bool exact, PreallocMode prealloc, - Error **errp); + BdrvRequestFlags flags, Error **errp); int64_t (*bdrv_getlength)(BlockDriverState *bs); bool has_variable_length; @@ -XXX,XX +XXX,XX @@ struct BlockDriverState { /* Flags honored during pwrite_zeroes (so far: BDRV_REQ_FUA, * BDRV_REQ_MAY_UNMAP, BDRV_REQ_WRITE_UNCHANGED) */ unsigned int supported_zero_flags; + /* + * Flags honoured during truncate (so far: BDRV_REQ_ZERO_WRITE). + * + * If BDRV_REQ_ZERO_WRITE is given, the truncate operation must make sure + * that any added space reads as all zeros. If this can't be guaranteed, + * the operation must fail. + */ + unsigned int supported_truncate_flags; /* the following member gives a name to every node on the bs graph. */ char node_name[32]; diff --git a/block/crypto.c b/block/crypto.c index XXXXXXX..XXXXXXX 100644 --- a/block/crypto.c +++ b/block/crypto.c @@ -XXX,XX +XXX,XX @@ static int block_crypto_co_create_generic(BlockDriverState *bs, static int coroutine_fn block_crypto_co_truncate(BlockDriverState *bs, int64_t offset, bool exact, - PreallocMode prealloc, Error **errp) + PreallocMode prealloc, BdrvRequestFlags flags, + Error **errp) { BlockCrypto *crypto = bs->opaque; uint64_t payload_offset = diff --git a/block/file-posix.c b/block/file-posix.c index XXXXXXX..XXXXXXX 100644 --- a/block/file-posix.c +++ b/block/file-posix.c @@ -XXX,XX +XXX,XX @@ raw_regular_truncate(BlockDriverState *bs, int fd, int64_t offset, static int coroutine_fn raw_co_truncate(BlockDriverState *bs, int64_t offset, bool exact, PreallocMode prealloc, - Error **errp) + BdrvRequestFlags flags, Error **errp) { BDRVRawState *s = bs->opaque; struct stat st; diff --git a/block/file-win32.c b/block/file-win32.c index XXXXXXX..XXXXXXX 100644 --- a/block/file-win32.c +++ b/block/file-win32.c @@ -XXX,XX +XXX,XX @@ static void raw_close(BlockDriverState *bs) static int coroutine_fn raw_co_truncate(BlockDriverState *bs, int64_t offset, bool exact, PreallocMode prealloc, - Error **errp) + BdrvRequestFlags flags, Error **errp) { BDRVRawState *s = bs->opaque; LONG low, high; diff --git a/block/gluster.c b/block/gluster.c index XXXXXXX..XXXXXXX 100644 --- a/block/gluster.c +++ b/block/gluster.c @@ -XXX,XX +XXX,XX @@ static coroutine_fn int qemu_gluster_co_truncate(BlockDriverState *bs, int64_t offset, bool exact, PreallocMode prealloc, + BdrvRequestFlags flags, Error **errp) { BDRVGlusterState *s = bs->opaque; diff --git a/block/io.c b/block/io.c index XXXXXXX..XXXXXXX 100644 --- a/block/io.c +++ b/block/io.c @@ -XXX,XX +XXX,XX @@ int coroutine_fn bdrv_co_truncate(BdrvChild *child, int64_t offset, bool exact, BlockDriverState *bs = child->bs; BlockDriver *drv = bs->drv; BdrvTrackedRequest req; + BdrvRequestFlags flags = 0; int64_t old_size, new_bytes; int ret; @@ -XXX,XX +XXX,XX @@ int coroutine_fn bdrv_co_truncate(BdrvChild *child, int64_t offset, bool exact, } if (drv->bdrv_co_truncate) { - ret = drv->bdrv_co_truncate(bs, offset, exact, prealloc, errp); + if (flags & ~bs->supported_truncate_flags) { + error_setg(errp, "Block driver does not support requested flags"); + ret = -ENOTSUP; + goto out; + } + ret = drv->bdrv_co_truncate(bs, offset, exact, prealloc, flags, errp); } else if (bs->file && drv->is_filter) { ret = bdrv_co_truncate(bs->file, offset, exact, prealloc, errp); } else { diff --git a/block/iscsi.c b/block/iscsi.c index XXXXXXX..XXXXXXX 100644 --- a/block/iscsi.c +++ b/block/iscsi.c @@ -XXX,XX +XXX,XX @@ static void iscsi_reopen_commit(BDRVReopenState *reopen_state) static int coroutine_fn iscsi_co_truncate(BlockDriverState *bs, int64_t offset, bool exact, PreallocMode prealloc, - Error **errp) + BdrvRequestFlags flags, Error **errp) { IscsiLun *iscsilun = bs->opaque; int64_t cur_length; diff --git a/block/nfs.c b/block/nfs.c index XXXXXXX..XXXXXXX 100644 --- a/block/nfs.c +++ b/block/nfs.c @@ -XXX,XX +XXX,XX @@ static int64_t nfs_get_allocated_file_size(BlockDriverState *bs) static int coroutine_fn nfs_file_co_truncate(BlockDriverState *bs, int64_t offset, bool exact, - PreallocMode prealloc, Error **errp) + PreallocMode prealloc, BdrvRequestFlags flags, + Error **errp) { NFSClient *client = bs->opaque; int ret; diff --git a/block/qcow2.c b/block/qcow2.c index XXXXXXX..XXXXXXX 100644 --- a/block/qcow2.c +++ b/block/qcow2.c @@ -XXX,XX +XXX,XX @@ fail: static int coroutine_fn qcow2_co_truncate(BlockDriverState *bs, int64_t offset, bool exact, PreallocMode prealloc, - Error **errp) + BdrvRequestFlags flags, Error **errp) { BDRVQcow2State *s = bs->opaque; uint64_t old_length; diff --git a/block/qed.c b/block/qed.c index XXXXXXX..XXXXXXX 100644 --- a/block/qed.c +++ b/block/qed.c @@ -XXX,XX +XXX,XX @@ static int coroutine_fn bdrv_qed_co_truncate(BlockDriverState *bs, int64_t offset, bool exact, PreallocMode prealloc, + BdrvRequestFlags flags, Error **errp) { BDRVQEDState *s = bs->opaque; diff --git a/block/raw-format.c b/block/raw-format.c index XXXXXXX..XXXXXXX 100644 --- a/block/raw-format.c +++ b/block/raw-format.c @@ -XXX,XX +XXX,XX @@ static void raw_refresh_limits(BlockDriverState *bs, Error **errp) static int coroutine_fn raw_co_truncate(BlockDriverState *bs, int64_t offset, bool exact, PreallocMode prealloc, - Error **errp) + BdrvRequestFlags flags, Error **errp) { BDRVRawState *s = bs->opaque; diff --git a/block/rbd.c b/block/rbd.c index XXXXXXX..XXXXXXX 100644 --- a/block/rbd.c +++ b/block/rbd.c @@ -XXX,XX +XXX,XX @@ static int coroutine_fn qemu_rbd_co_truncate(BlockDriverState *bs, int64_t offset, bool exact, PreallocMode prealloc, + BdrvRequestFlags flags, Error **errp) { int r; diff --git a/block/sheepdog.c b/block/sheepdog.c index XXXXXXX..XXXXXXX 100644 --- a/block/sheepdog.c +++ b/block/sheepdog.c @@ -XXX,XX +XXX,XX @@ static int64_t sd_getlength(BlockDriverState *bs) static int coroutine_fn sd_co_truncate(BlockDriverState *bs, int64_t offset, bool exact, PreallocMode prealloc, - Error **errp) + BdrvRequestFlags flags, Error **errp) { BDRVSheepdogState *s = bs->opaque; int ret, fd; @@ -XXX,XX +XXX,XX @@ static coroutine_fn int sd_co_writev(BlockDriverState *bs, int64_t sector_num, assert(!flags); if (offset > s->inode.vdi_size) { - ret = sd_co_truncate(bs, offset, false, PREALLOC_MODE_OFF, NULL); + ret = sd_co_truncate(bs, offset, false, PREALLOC_MODE_OFF, 0, NULL); if (ret < 0) { return ret; } diff --git a/block/ssh.c b/block/ssh.c index XXXXXXX..XXXXXXX 100644 --- a/block/ssh.c +++ b/block/ssh.c @@ -XXX,XX +XXX,XX @@ static int64_t ssh_getlength(BlockDriverState *bs) static int coroutine_fn ssh_co_truncate(BlockDriverState *bs, int64_t offset, bool exact, PreallocMode prealloc, - Error **errp) + BdrvRequestFlags flags, Error **errp) { BDRVSSHState *s = bs->opaque; diff --git a/tests/test-block-iothread.c b/tests/test-block-iothread.c index XXXXXXX..XXXXXXX 100644 --- a/tests/test-block-iothread.c +++ b/tests/test-block-iothread.c @@ -XXX,XX +XXX,XX @@ static int coroutine_fn bdrv_test_co_pdiscard(BlockDriverState *bs, static int coroutine_fn bdrv_test_co_truncate(BlockDriverState *bs, int64_t offset, bool exact, - PreallocMode prealloc, Error **errp) + PreallocMode prealloc, BdrvRequestFlags flags, + Error **errp) { return 0; } -- 2.25.3 Now that block drivers can support flags for .bdrv_co_truncate, expose the parameter in the node level interfaces bdrv_co_truncate() and bdrv_truncate(). Signed-off-by: Kevin Wolf <kwolf@redhat.com> Reviewed-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com> Reviewed-by: Alberto Garcia <berto@igalia.com> Reviewed-by: Max Reitz <mreitz@redhat.com> Message-Id: <20200424125448.63318-3-kwolf@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com> --- include/block/block.h | 5 +++-- block/block-backend.c | 2 +- block/crypto.c | 2 +- block/io.c | 12 +++++++----- block/parallels.c | 6 +++--- block/qcow.c | 4 ++-- block/qcow2-refcount.c | 2 +- block/qcow2.c | 15 +++++++++------ block/raw-format.c | 2 +- block/vhdx-log.c | 2 +- block/vhdx.c | 2 +- block/vmdk.c | 2 +- tests/test-block-iothread.c | 6 +++--- 13 files changed, 34 insertions(+), 28 deletions(-) diff --git a/include/block/block.h b/include/block/block.h index XXXXXXX..XXXXXXX 100644 --- a/include/block/block.h +++ b/include/block/block.h @@ -XXX,XX +XXX,XX @@ BlockDriverState *bdrv_find_backing_image(BlockDriverState *bs, void bdrv_refresh_filename(BlockDriverState *bs); int coroutine_fn bdrv_co_truncate(BdrvChild *child, int64_t offset, bool exact, - PreallocMode prealloc, Error **errp); + PreallocMode prealloc, BdrvRequestFlags flags, + Error **errp); int bdrv_truncate(BdrvChild *child, int64_t offset, bool exact, - PreallocMode prealloc, Error **errp); + PreallocMode prealloc, BdrvRequestFlags flags, Error **errp); int64_t bdrv_nb_sectors(BlockDriverState *bs); int64_t bdrv_getlength(BlockDriverState *bs); diff --git a/block/block-backend.c b/block/block-backend.c index XXXXXXX..XXXXXXX 100644 --- a/block/block-backend.c +++ b/block/block-backend.c @@ -XXX,XX +XXX,XX @@ int blk_truncate(BlockBackend *blk, int64_t offset, bool exact, return -ENOMEDIUM; } - return bdrv_truncate(blk->root, offset, exact, prealloc, errp); + return bdrv_truncate(blk->root, offset, exact, prealloc, 0, errp); } int blk_save_vmstate(BlockBackend *blk, const uint8_t *buf, diff --git a/block/crypto.c b/block/crypto.c index XXXXXXX..XXXXXXX 100644 --- a/block/crypto.c +++ b/block/crypto.c @@ -XXX,XX +XXX,XX @@ block_crypto_co_truncate(BlockDriverState *bs, int64_t offset, bool exact, offset += payload_offset; - return bdrv_co_truncate(bs->file, offset, exact, prealloc, errp); + return bdrv_co_truncate(bs->file, offset, exact, prealloc, 0, errp); } static void block_crypto_close(BlockDriverState *bs) diff --git a/block/io.c b/block/io.c index XXXXXXX..XXXXXXX 100644 --- a/block/io.c +++ b/block/io.c @@ -XXX,XX +XXX,XX @@ static void bdrv_parent_cb_resize(BlockDriverState *bs) * 'offset' bytes in length. */ int coroutine_fn bdrv_co_truncate(BdrvChild *child, int64_t offset, bool exact, - PreallocMode prealloc, Error **errp) + PreallocMode prealloc, BdrvRequestFlags flags, + Error **errp) { BlockDriverState *bs = child->bs; BlockDriver *drv = bs->drv; BdrvTrackedRequest req; - BdrvRequestFlags flags = 0; int64_t old_size, new_bytes; int ret; @@ -XXX,XX +XXX,XX @@ int coroutine_fn bdrv_co_truncate(BdrvChild *child, int64_t offset, bool exact, } ret = drv->bdrv_co_truncate(bs, offset, exact, prealloc, flags, errp); } else if (bs->file && drv->is_filter) { - ret = bdrv_co_truncate(bs->file, offset, exact, prealloc, errp); + ret = bdrv_co_truncate(bs->file, offset, exact, prealloc, flags, errp); } else { error_setg(errp, "Image format driver does not support resize"); ret = -ENOTSUP; @@ -XXX,XX +XXX,XX @@ typedef struct TruncateCo { int64_t offset; bool exact; PreallocMode prealloc; + BdrvRequestFlags flags; Error **errp; int ret; } TruncateCo; @@ -XXX,XX +XXX,XX @@ static void coroutine_fn bdrv_truncate_co_entry(void *opaque) { TruncateCo *tco = opaque; tco->ret = bdrv_co_truncate(tco->child, tco->offset, tco->exact, - tco->prealloc, tco->errp); + tco->prealloc, tco->flags, tco->errp); aio_wait_kick(); } int bdrv_truncate(BdrvChild *child, int64_t offset, bool exact, - PreallocMode prealloc, Error **errp) + PreallocMode prealloc, BdrvRequestFlags flags, Error **errp) { Coroutine *co; TruncateCo tco = { @@ -XXX,XX +XXX,XX @@ int bdrv_truncate(BdrvChild *child, int64_t offset, bool exact, .offset = offset, .exact = exact, .prealloc = prealloc, + .flags = flags, .errp = errp, .ret = NOT_DONE, }; diff --git a/block/parallels.c b/block/parallels.c index XXXXXXX..XXXXXXX 100644 --- a/block/parallels.c +++ b/block/parallels.c @@ -XXX,XX +XXX,XX @@ static int64_t allocate_clusters(BlockDriverState *bs, int64_t sector_num, } else { ret = bdrv_truncate(bs->file, (s->data_end + space) << BDRV_SECTOR_BITS, - false, PREALLOC_MODE_OFF, NULL); + false, PREALLOC_MODE_OFF, 0, NULL); } if (ret < 0) { return ret; @@ -XXX,XX +XXX,XX @@ static int coroutine_fn parallels_co_check(BlockDriverState *bs, * That means we have to pass exact=true. */ ret = bdrv_truncate(bs->file, res->image_end_offset, true, - PREALLOC_MODE_OFF, &local_err); + PREALLOC_MODE_OFF, 0, &local_err); if (ret < 0) { error_report_err(local_err); res->check_errors++; @@ -XXX,XX +XXX,XX @@ static void parallels_close(BlockDriverState *bs) /* errors are ignored, so we might as well pass exact=true */ bdrv_truncate(bs->file, s->data_end << BDRV_SECTOR_BITS, true, - PREALLOC_MODE_OFF, NULL); + PREALLOC_MODE_OFF, 0, NULL); } g_free(s->bat_dirty_bmap); diff --git a/block/qcow.c b/block/qcow.c index XXXXXXX..XXXXXXX 100644 --- a/block/qcow.c +++ b/block/qcow.c @@ -XXX,XX +XXX,XX @@ static int get_cluster_offset(BlockDriverState *bs, return -E2BIG; } ret = bdrv_truncate(bs->file, cluster_offset + s->cluster_size, - false, PREALLOC_MODE_OFF, NULL); + false, PREALLOC_MODE_OFF, 0, NULL); if (ret < 0) { return ret; } @@ -XXX,XX +XXX,XX @@ static int qcow_make_empty(BlockDriverState *bs) l1_length) < 0) return -1; ret = bdrv_truncate(bs->file, s->l1_table_offset + l1_length, false, - PREALLOC_MODE_OFF, NULL); + PREALLOC_MODE_OFF, 0, NULL); if (ret < 0) return ret; diff --git a/block/qcow2-refcount.c b/block/qcow2-refcount.c index XXXXXXX..XXXXXXX 100644 --- a/block/qcow2-refcount.c +++ b/block/qcow2-refcount.c @@ -XXX,XX +XXX,XX @@ static int check_refblocks(BlockDriverState *bs, BdrvCheckResult *res, } ret = bdrv_truncate(bs->file, offset + s->cluster_size, false, - PREALLOC_MODE_OFF, &local_err); + PREALLOC_MODE_OFF, 0, &local_err); if (ret < 0) { error_report_err(local_err); goto resize_fail; diff --git a/block/qcow2.c b/block/qcow2.c index XXXXXXX..XXXXXXX 100644 --- a/block/qcow2.c +++ b/block/qcow2.c @@ -XXX,XX +XXX,XX @@ static int coroutine_fn preallocate_co(BlockDriverState *bs, uint64_t offset, mode = PREALLOC_MODE_OFF; } ret = bdrv_co_truncate(s->data_file, host_offset + cur_bytes, false, - mode, errp); + mode, 0, errp); if (ret < 0) { return ret; } @@ -XXX,XX +XXX,XX @@ static int coroutine_fn qcow2_co_truncate(BlockDriverState *bs, int64_t offset, * always fulfilled, so there is no need to pass it on.) */ bdrv_co_truncate(bs->file, (last_cluster + 1) * s->cluster_size, - false, PREALLOC_MODE_OFF, &local_err); + false, PREALLOC_MODE_OFF, 0, &local_err); if (local_err) { warn_reportf_err(local_err, "Failed to truncate the tail of the image: "); @@ -XXX,XX +XXX,XX @@ static int coroutine_fn qcow2_co_truncate(BlockDriverState *bs, int64_t offset, * file should be resized to the exact target size, too, * so we pass @exact here. */ - ret = bdrv_co_truncate(s->data_file, offset, exact, prealloc, errp); + ret = bdrv_co_truncate(s->data_file, offset, exact, prealloc, 0, + errp); if (ret < 0) { goto fail; } @@ -XXX,XX +XXX,XX @@ static int coroutine_fn qcow2_co_truncate(BlockDriverState *bs, int64_t offset, new_file_size = allocation_start + nb_new_data_clusters * s->cluster_size; /* Image file grows, so @exact does not matter */ - ret = bdrv_co_truncate(bs->file, new_file_size, false, prealloc, errp); + ret = bdrv_co_truncate(bs->file, new_file_size, false, prealloc, 0, + errp); if (ret < 0) { error_prepend(errp, "Failed to resize underlying file: "); qcow2_free_clusters(bs, allocation_start, @@ -XXX,XX +XXX,XX @@ qcow2_co_pwritev_compressed_part(BlockDriverState *bs, if (len < 0) { return len; } - return bdrv_co_truncate(bs->file, len, false, PREALLOC_MODE_OFF, NULL); + return bdrv_co_truncate(bs->file, len, false, PREALLOC_MODE_OFF, 0, + NULL); } if (offset_into_cluster(s, offset)) { @@ -XXX,XX +XXX,XX @@ static int make_completely_empty(BlockDriverState *bs) } ret = bdrv_truncate(bs->file, (3 + l1_clusters) * s->cluster_size, false, - PREALLOC_MODE_OFF, &local_err); + PREALLOC_MODE_OFF, 0, &local_err); if (ret < 0) { error_report_err(local_err); goto fail; diff --git a/block/raw-format.c b/block/raw-format.c index XXXXXXX..XXXXXXX 100644 --- a/block/raw-format.c +++ b/block/raw-format.c @@ -XXX,XX +XXX,XX @@ static int coroutine_fn raw_co_truncate(BlockDriverState *bs, int64_t offset, s->size = offset; offset += s->offset; - return bdrv_co_truncate(bs->file, offset, exact, prealloc, errp); + return bdrv_co_truncate(bs->file, offset, exact, prealloc, 0, errp); } static void raw_eject(BlockDriverState *bs, bool eject_flag) diff --git a/block/vhdx-log.c b/block/vhdx-log.c index XXXXXXX..XXXXXXX 100644 --- a/block/vhdx-log.c +++ b/block/vhdx-log.c @@ -XXX,XX +XXX,XX @@ static int vhdx_log_flush(BlockDriverState *bs, BDRVVHDXState *s, goto exit; } ret = bdrv_truncate(bs->file, new_file_size, false, - PREALLOC_MODE_OFF, NULL); + PREALLOC_MODE_OFF, 0, NULL); if (ret < 0) { goto exit; } diff --git a/block/vhdx.c b/block/vhdx.c index XXXXXXX..XXXXXXX 100644 --- a/block/vhdx.c +++ b/block/vhdx.c @@ -XXX,XX +XXX,XX @@ static int vhdx_allocate_block(BlockDriverState *bs, BDRVVHDXState *s, } return bdrv_truncate(bs->file, *new_offset + s->block_size, false, - PREALLOC_MODE_OFF, NULL); + PREALLOC_MODE_OFF, 0, NULL); } /* diff --git a/block/vmdk.c b/block/vmdk.c index XXXXXXX..XXXXXXX 100644 --- a/block/vmdk.c +++ b/block/vmdk.c @@ -XXX,XX +XXX,XX @@ vmdk_co_pwritev_compressed(BlockDriverState *bs, uint64_t offset, } length = QEMU_ALIGN_UP(length, BDRV_SECTOR_SIZE); ret = bdrv_truncate(s->extents[i].file, length, false, - PREALLOC_MODE_OFF, NULL); + PREALLOC_MODE_OFF, 0, NULL); if (ret < 0) { return ret; } diff --git a/tests/test-block-iothread.c b/tests/test-block-iothread.c index XXXXXXX..XXXXXXX 100644 --- a/tests/test-block-iothread.c +++ b/tests/test-block-iothread.c @@ -XXX,XX +XXX,XX @@ static void test_sync_op_truncate(BdrvChild *c) int ret; /* Normal success path */ - ret = bdrv_truncate(c, 65536, false, PREALLOC_MODE_OFF, NULL); + ret = bdrv_truncate(c, 65536, false, PREALLOC_MODE_OFF, 0, NULL); g_assert_cmpint(ret, ==, 0); /* Early error: Negative offset */ - ret = bdrv_truncate(c, -2, false, PREALLOC_MODE_OFF, NULL); + ret = bdrv_truncate(c, -2, false, PREALLOC_MODE_OFF, 0, NULL); g_assert_cmpint(ret, ==, -EINVAL); /* Error: Read-only image */ c->bs->read_only = true; c->bs->open_flags &= ~BDRV_O_RDWR; - ret = bdrv_truncate(c, 65536, false, PREALLOC_MODE_OFF, NULL); + ret = bdrv_truncate(c, 65536, false, PREALLOC_MODE_OFF, 0, NULL); g_assert_cmpint(ret, ==, -EACCES); c->bs->read_only = false; -- 2.25.3 Now that node level interface bdrv_truncate() supports passing request flags to the block driver, expose this on the BlockBackend level, too. Signed-off-by: Kevin Wolf <kwolf@redhat.com> Reviewed-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com> Reviewed-by: Alberto Garcia <berto@igalia.com> Reviewed-by: Max Reitz <mreitz@redhat.com> Message-Id: <20200424125448.63318-4-kwolf@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com> --- include/sysemu/block-backend.h | 2 +- block.c | 3 ++- block/block-backend.c | 4 ++-- block/commit.c | 4 ++-- block/crypto.c | 2 +- block/mirror.c | 2 +- block/qcow2.c | 4 ++-- block/qed.c | 2 +- block/vdi.c | 2 +- block/vhdx.c | 4 ++-- block/vmdk.c | 6 +++--- block/vpc.c | 2 +- blockdev.c | 2 +- qemu-img.c | 2 +- qemu-io-cmds.c | 2 +- 15 files changed, 22 insertions(+), 21 deletions(-) diff --git a/include/sysemu/block-backend.h b/include/sysemu/block-backend.h index XXXXXXX..XXXXXXX 100644 --- a/include/sysemu/block-backend.h +++ b/include/sysemu/block-backend.h @@ -XXX,XX +XXX,XX @@ int coroutine_fn blk_co_pwrite_zeroes(BlockBackend *blk, int64_t offset, int blk_pwrite_compressed(BlockBackend *blk, int64_t offset, const void *buf, int bytes); int blk_truncate(BlockBackend *blk, int64_t offset, bool exact, - PreallocMode prealloc, Error **errp); + PreallocMode prealloc, BdrvRequestFlags flags, Error **errp); int blk_pdiscard(BlockBackend *blk, int64_t offset, int bytes); int blk_save_vmstate(BlockBackend *blk, const uint8_t *buf, int64_t pos, int size); diff --git a/block.c b/block.c index XXXXXXX..XXXXXXX 100644 --- a/block.c +++ b/block.c @@ -XXX,XX +XXX,XX @@ static int64_t create_file_fallback_truncate(BlockBackend *blk, int64_t size; int ret; - ret = blk_truncate(blk, minimum_size, false, PREALLOC_MODE_OFF, &local_err); + ret = blk_truncate(blk, minimum_size, false, PREALLOC_MODE_OFF, 0, + &local_err); if (ret < 0 && ret != -ENOTSUP) { error_propagate(errp, local_err); return ret; diff --git a/block/block-backend.c b/block/block-backend.c index XXXXXXX..XXXXXXX 100644 --- a/block/block-backend.c +++ b/block/block-backend.c @@ -XXX,XX +XXX,XX @@ int blk_pwrite_compressed(BlockBackend *blk, int64_t offset, const void *buf, } int blk_truncate(BlockBackend *blk, int64_t offset, bool exact, - PreallocMode prealloc, Error **errp) + PreallocMode prealloc, BdrvRequestFlags flags, Error **errp) { if (!blk_is_available(blk)) { error_setg(errp, "No medium inserted"); return -ENOMEDIUM; } - return bdrv_truncate(blk->root, offset, exact, prealloc, 0, errp); + return bdrv_truncate(blk->root, offset, exact, prealloc, flags, errp); } int blk_save_vmstate(BlockBackend *blk, const uint8_t *buf, diff --git a/block/commit.c b/block/commit.c index XXXXXXX..XXXXXXX 100644 --- a/block/commit.c +++ b/block/commit.c @@ -XXX,XX +XXX,XX @@ static int coroutine_fn commit_run(Job *job, Error **errp) } if (base_len < len) { - ret = blk_truncate(s->base, len, false, PREALLOC_MODE_OFF, NULL); + ret = blk_truncate(s->base, len, false, PREALLOC_MODE_OFF, 0, NULL); if (ret) { goto out; } @@ -XXX,XX +XXX,XX @@ int bdrv_commit(BlockDriverState *bs) * grow the backing file image if possible. If not possible, * we must return an error */ if (length > backing_length) { - ret = blk_truncate(backing, length, false, PREALLOC_MODE_OFF, + ret = blk_truncate(backing, length, false, PREALLOC_MODE_OFF, 0, &local_err); if (ret < 0) { error_report_err(local_err); diff --git a/block/crypto.c b/block/crypto.c index XXXXXXX..XXXXXXX 100644 --- a/block/crypto.c +++ b/block/crypto.c @@ -XXX,XX +XXX,XX @@ static ssize_t block_crypto_init_func(QCryptoBlock *block, * which will be used by the crypto header */ return blk_truncate(data->blk, data->size + headerlen, false, - data->prealloc, errp); + data->prealloc, 0, errp); } diff --git a/block/mirror.c b/block/mirror.c index XXXXXXX..XXXXXXX 100644 --- a/block/mirror.c +++ b/block/mirror.c @@ -XXX,XX +XXX,XX @@ static int coroutine_fn mirror_run(Job *job, Error **errp) if (s->bdev_length > base_length) { ret = blk_truncate(s->target, s->bdev_length, false, - PREALLOC_MODE_OFF, NULL); + PREALLOC_MODE_OFF, 0, NULL); if (ret < 0) { goto immediate_exit; } diff --git a/block/qcow2.c b/block/qcow2.c index XXXXXXX..XXXXXXX 100644 --- a/block/qcow2.c +++ b/block/qcow2.c @@ -XXX,XX +XXX,XX @@ qcow2_co_create(BlockdevCreateOptions *create_options, Error **errp) /* Okay, now that we have a valid image, let's give it the right size */ ret = blk_truncate(blk, qcow2_opts->size, false, qcow2_opts->preallocation, - errp); + 0, errp); if (ret < 0) { error_prepend(errp, "Could not resize image: "); goto out; @@ -XXX,XX +XXX,XX @@ static int qcow2_amend_options(BlockDriverState *bs, QemuOpts *opts, * Amending image options should ensure that the image has * exactly the given new values, so pass exact=true here. */ - ret = blk_truncate(blk, new_size, true, PREALLOC_MODE_OFF, errp); + ret = blk_truncate(blk, new_size, true, PREALLOC_MODE_OFF, 0, errp); blk_unref(blk); if (ret < 0) { return ret; diff --git a/block/qed.c b/block/qed.c index XXXXXXX..XXXXXXX 100644 --- a/block/qed.c +++ b/block/qed.c @@ -XXX,XX +XXX,XX @@ static int coroutine_fn bdrv_qed_co_create(BlockdevCreateOptions *opts, * The QED format associates file length with allocation status, * so a new file (which is empty) must have a length of 0. */ - ret = blk_truncate(blk, 0, true, PREALLOC_MODE_OFF, errp); + ret = blk_truncate(blk, 0, true, PREALLOC_MODE_OFF, 0, errp); if (ret < 0) { goto out; } diff --git a/block/vdi.c b/block/vdi.c index XXXXXXX..XXXXXXX 100644 --- a/block/vdi.c +++ b/block/vdi.c @@ -XXX,XX +XXX,XX @@ static int coroutine_fn vdi_co_do_create(BlockdevCreateOptions *create_options, if (image_type == VDI_TYPE_STATIC) { ret = blk_truncate(blk, offset + blocks * block_size, false, - PREALLOC_MODE_OFF, errp); + PREALLOC_MODE_OFF, 0, errp); if (ret < 0) { error_prepend(errp, "Failed to statically allocate file"); goto exit; diff --git a/block/vhdx.c b/block/vhdx.c index XXXXXXX..XXXXXXX 100644 --- a/block/vhdx.c +++ b/block/vhdx.c @@ -XXX,XX +XXX,XX @@ static int vhdx_create_bat(BlockBackend *blk, BDRVVHDXState *s, /* All zeroes, so we can just extend the file - the end of the BAT * is the furthest thing we have written yet */ ret = blk_truncate(blk, data_file_offset, false, PREALLOC_MODE_OFF, - errp); + 0, errp); if (ret < 0) { goto exit; } } else if (type == VHDX_TYPE_FIXED) { ret = blk_truncate(blk, data_file_offset + image_size, false, - PREALLOC_MODE_OFF, errp); + PREALLOC_MODE_OFF, 0, errp); if (ret < 0) { goto exit; } diff --git a/block/vmdk.c b/block/vmdk.c index XXXXXXX..XXXXXXX 100644 --- a/block/vmdk.c +++ b/block/vmdk.c @@ -XXX,XX +XXX,XX @@ static int vmdk_init_extent(BlockBackend *blk, int gd_buf_size; if (flat) { - ret = blk_truncate(blk, filesize, false, PREALLOC_MODE_OFF, errp); + ret = blk_truncate(blk, filesize, false, PREALLOC_MODE_OFF, 0, errp); goto exit; } magic = cpu_to_be32(VMDK4_MAGIC); @@ -XXX,XX +XXX,XX @@ static int vmdk_init_extent(BlockBackend *blk, } ret = blk_truncate(blk, le64_to_cpu(header.grain_offset) << 9, false, - PREALLOC_MODE_OFF, errp); + PREALLOC_MODE_OFF, 0, errp); if (ret < 0) { goto exit; } @@ -XXX,XX +XXX,XX @@ static int coroutine_fn vmdk_co_do_create(int64_t size, /* bdrv_pwrite write padding zeros to align to sector, we don't need that * for description file */ if (desc_offset == 0) { - ret = blk_truncate(blk, desc_len, false, PREALLOC_MODE_OFF, errp); + ret = blk_truncate(blk, desc_len, false, PREALLOC_MODE_OFF, 0, errp); if (ret < 0) { goto exit; } diff --git a/block/vpc.c b/block/vpc.c index XXXXXXX..XXXXXXX 100644 --- a/block/vpc.c +++ b/block/vpc.c @@ -XXX,XX +XXX,XX @@ static int create_fixed_disk(BlockBackend *blk, uint8_t *buf, /* Add footer to total size */ total_size += HEADER_SIZE; - ret = blk_truncate(blk, total_size, false, PREALLOC_MODE_OFF, errp); + ret = blk_truncate(blk, total_size, false, PREALLOC_MODE_OFF, 0, errp); if (ret < 0) { return ret; } diff --git a/blockdev.c b/blockdev.c index XXXXXXX..XXXXXXX 100644 --- a/blockdev.c +++ b/blockdev.c @@ -XXX,XX +XXX,XX @@ void qmp_block_resize(bool has_device, const char *device, } bdrv_drained_begin(bs); - ret = blk_truncate(blk, size, false, PREALLOC_MODE_OFF, errp); + ret = blk_truncate(blk, size, false, PREALLOC_MODE_OFF, 0, errp); bdrv_drained_end(bs); out: diff --git a/qemu-img.c b/qemu-img.c index XXXXXXX..XXXXXXX 100644 --- a/qemu-img.c +++ b/qemu-img.c @@ -XXX,XX +XXX,XX @@ static int img_resize(int argc, char **argv) * resizing, so pass @exact=true. It is of no use to report * success when the image has not actually been resized. */ - ret = blk_truncate(blk, total_size, true, prealloc, &err); + ret = blk_truncate(blk, total_size, true, prealloc, 0, &err); if (!ret) { qprintf(quiet, "Image resized.\n"); } else { diff --git a/qemu-io-cmds.c b/qemu-io-cmds.c index XXXXXXX..XXXXXXX 100644 --- a/qemu-io-cmds.c +++ b/qemu-io-cmds.c @@ -XXX,XX +XXX,XX @@ static int truncate_f(BlockBackend *blk, int argc, char **argv) * exact=true. It is better to err on the "emit more errors" side * than to be overly permissive. */ - ret = blk_truncate(blk, offset, true, PREALLOC_MODE_OFF, &local_err); + ret = blk_truncate(blk, offset, true, PREALLOC_MODE_OFF, 0, &local_err); if (ret < 0) { error_report_err(local_err); return ret; -- 2.25.3 If BDRV_REQ_ZERO_WRITE is set and we're extending the image, calling qcow2_cluster_zeroize() with flags=0 does the right thing: It doesn't undo any previous preallocation, but just adds the zero flag to all relevant L2 entries. If an external data file is in use, a write_zeroes request to the data file is made instead. Signed-off-by: Kevin Wolf <kwolf@redhat.com> Message-Id: <20200424125448.63318-5-kwolf@redhat.com> Reviewed-by: Eric Blake <eblake@redhat.com> Reviewed-by: Max Reitz <mreitz@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com> --- block/qcow2-cluster.c | 2 +- block/qcow2.c | 34 ++++++++++++++++++++++++++++++++++ 2 files changed, 35 insertions(+), 1 deletion(-) diff --git a/block/qcow2-cluster.c b/block/qcow2-cluster.c index XXXXXXX..XXXXXXX 100644 --- a/block/qcow2-cluster.c +++ b/block/qcow2-cluster.c @@ -XXX,XX +XXX,XX @@ int qcow2_cluster_zeroize(BlockDriverState *bs, uint64_t offset, /* Caller must pass aligned values, except at image end */ assert(QEMU_IS_ALIGNED(offset, s->cluster_size)); assert(QEMU_IS_ALIGNED(end_offset, s->cluster_size) || - end_offset == bs->total_sectors << BDRV_SECTOR_BITS); + end_offset >= bs->total_sectors << BDRV_SECTOR_BITS); /* The zero flag is only supported by version 3 and newer */ if (s->qcow_version < 3) { diff --git a/block/qcow2.c b/block/qcow2.c index XXXXXXX..XXXXXXX 100644 --- a/block/qcow2.c +++ b/block/qcow2.c @@ -XXX,XX +XXX,XX @@ static int coroutine_fn qcow2_do_open(BlockDriverState *bs, QDict *options, bs->supported_zero_flags = header.version >= 3 ? BDRV_REQ_MAY_UNMAP | BDRV_REQ_NO_FALLBACK : 0; + bs->supported_truncate_flags = BDRV_REQ_ZERO_WRITE; /* Repair image if dirty */ if (!(flags & (BDRV_O_CHECK | BDRV_O_INACTIVE)) && !bs->read_only && @@ -XXX,XX +XXX,XX @@ static int coroutine_fn qcow2_co_truncate(BlockDriverState *bs, int64_t offset, g_assert_not_reached(); } + if ((flags & BDRV_REQ_ZERO_WRITE) && offset > old_length) { + uint64_t zero_start = QEMU_ALIGN_UP(old_length, s->cluster_size); + + /* + * Use zero clusters as much as we can. qcow2_cluster_zeroize() + * requires a cluster-aligned start. The end may be unaligned if it is + * at the end of the image (which it is here). + */ + ret = qcow2_cluster_zeroize(bs, zero_start, offset - zero_start, 0); + if (ret < 0) { + error_setg_errno(errp, -ret, "Failed to zero out new clusters"); + goto fail; + } + + /* Write explicit zeros for the unaligned head */ + if (zero_start > old_length) { + uint64_t len = zero_start - old_length; + uint8_t *buf = qemu_blockalign0(bs, len); + QEMUIOVector qiov; + qemu_iovec_init_buf(&qiov, buf, len); + + qemu_co_mutex_unlock(&s->lock); + ret = qcow2_co_pwritev_part(bs, old_length, len, &qiov, 0, 0); + qemu_co_mutex_lock(&s->lock); + + qemu_vfree(buf); + if (ret < 0) { + error_setg_errno(errp, -ret, "Failed to zero out the new area"); + goto fail; + } + } + } + if (prealloc != PREALLOC_MODE_OFF) { /* Flush metadata before actually changing the image size */ ret = qcow2_write_caches(bs); -- 2.25.3 The raw format driver can simply forward the flag and let its bs->file child take care of actually providing the zeros. Signed-off-by: Kevin Wolf <kwolf@redhat.com> Reviewed-by: Max Reitz <mreitz@redhat.com> Reviewed-by: Eric Blake <eblake@redhat.com> Reviewed-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com> Message-Id: <20200424125448.63318-6-kwolf@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com> --- block/raw-format.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/block/raw-format.c b/block/raw-format.c index XXXXXXX..XXXXXXX 100644 --- a/block/raw-format.c +++ b/block/raw-format.c @@ -XXX,XX +XXX,XX @@ static int coroutine_fn raw_co_truncate(BlockDriverState *bs, int64_t offset, s->size = offset; offset += s->offset; - return bdrv_co_truncate(bs->file, offset, exact, prealloc, 0, errp); + return bdrv_co_truncate(bs->file, offset, exact, prealloc, flags, errp); } static void raw_eject(BlockDriverState *bs, bool eject_flag) @@ -XXX,XX +XXX,XX @@ static int raw_open(BlockDriverState *bs, QDict *options, int flags, bs->supported_zero_flags = BDRV_REQ_WRITE_UNCHANGED | ((BDRV_REQ_FUA | BDRV_REQ_MAY_UNMAP | BDRV_REQ_NO_FALLBACK) & bs->file->bs->supported_zero_flags); + bs->supported_truncate_flags = bs->file->bs->supported_truncate_flags & + BDRV_REQ_ZERO_WRITE; if (bs->probed && !bdrv_is_read_only(bs)) { bdrv_refresh_filename(bs->file->bs); -- 2.25.3 For regular files, we always get BDRV_REQ_ZERO_WRITE behaviour from the OS, so we can advertise the flag and just ignore it. Signed-off-by: Kevin Wolf <kwolf@redhat.com> Reviewed-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com> Reviewed-by: Alberto Garcia <berto@igalia.com> Reviewed-by: Max Reitz <mreitz@redhat.com> Message-Id: <20200424125448.63318-7-kwolf@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com> --- block/file-posix.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/block/file-posix.c b/block/file-posix.c index XXXXXXX..XXXXXXX 100644 --- a/block/file-posix.c +++ b/block/file-posix.c @@ -XXX,XX +XXX,XX @@ static int raw_open_common(BlockDriverState *bs, QDict *options, #endif bs->supported_zero_flags = BDRV_REQ_MAY_UNMAP | BDRV_REQ_NO_FALLBACK; + if (S_ISREG(st.st_mode)) { + /* When extending regular files, we get zeros from the OS */ + bs->supported_truncate_flags = BDRV_REQ_ZERO_WRITE; + } ret = 0; fail: if (filename && (bdrv_flags & BDRV_O_TEMPORARY)) { -- 2.25.3 When extending the size of an image that has a backing file larger than its old size, make sure that the backing file data doesn't become visible in the guest, but the added area is properly zeroed out. Consider the following scenario where the overlay is shorter than its backing file: base.qcow2: AAAAAAAA overlay.qcow2: BBBB When resizing (extending) overlay.qcow2, the new blocks should not stay unallocated and make the additional As from base.qcow2 visible like before this patch, but zeros should be read. A similar case happens with the various variants of a commit job when an intermediate file is short (- for unallocated): base.qcow2: A-A-AAAA mid.qcow2: BB-B top.qcow2: C--C--C- After commit top.qcow2 to mid.qcow2, the following happens: mid.qcow2: CB-C00C0 (correct result) mid.qcow2: CB-C--C- (before this fix) Without the fix, blocks that previously read as zeros on top.qcow2 suddenly turn into A. Signed-off-by: Kevin Wolf <kwolf@redhat.com> Reviewed-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com> Message-Id: <20200424125448.63318-8-kwolf@redhat.com> Reviewed-by: Max Reitz <mreitz@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com> --- block/io.c | 25 +++++++++++++++++++++++++ 1 file changed, 25 insertions(+) diff --git a/block/io.c b/block/io.c index XXXXXXX..XXXXXXX 100644 --- a/block/io.c +++ b/block/io.c @@ -XXX,XX +XXX,XX @@ int coroutine_fn bdrv_co_truncate(BdrvChild *child, int64_t offset, bool exact, goto out; } + /* + * If the image has a backing file that is large enough that it would + * provide data for the new area, we cannot leave it unallocated because + * then the backing file content would become visible. Instead, zero-fill + * the new area. + * + * Note that if the image has a backing file, but was opened without the + * backing file, taking care of keeping things consistent with that backing + * file is the user's responsibility. + */ + if (new_bytes && bs->backing) { + int64_t backing_len; + + backing_len = bdrv_getlength(backing_bs(bs)); + if (backing_len < 0) { + ret = backing_len; + error_setg_errno(errp, -ret, "Could not get backing file size"); + goto out; + } + + if (backing_len > old_size) { + flags |= BDRV_REQ_ZERO_WRITE; + } + } + if (drv->bdrv_co_truncate) { if (flags & ~bs->supported_truncate_flags) { error_setg(errp, "Block driver does not support requested flags"); -- 2.25.3 We want to keep TEST_IMG for the full path of the main test image, but filter_testfiles() must be called for other test images before replacing other things like the image format because the test directory path could contain the format as a substring. Insert a filter_testfiles() call between both. Signed-off-by: Kevin Wolf <kwolf@redhat.com> Reviewed-by: Max Reitz <mreitz@redhat.com> Reviewed-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com> Message-Id: <20200424125448.63318-9-kwolf@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com> --- tests/qemu-iotests/iotests.py | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-) diff --git a/tests/qemu-iotests/iotests.py b/tests/qemu-iotests/iotests.py index XXXXXXX..XXXXXXX 100644 --- a/tests/qemu-iotests/iotests.py +++ b/tests/qemu-iotests/iotests.py @@ -XXX,XX +XXX,XX @@ def filter_img_info(output, filename): for line in output.split('\n'): if 'disk size' in line or 'actual-size' in line: continue - line = line.replace(filename, 'TEST_IMG') \ - .replace(imgfmt, 'IMGFMT') + line = line.replace(filename, 'TEST_IMG') + line = filter_testfiles(line) + line = line.replace(imgfmt, 'IMGFMT') line = re.sub('iters: [0-9]+', 'iters: XXX', line) line = re.sub('uuid: [-a-f0-9]+', 'uuid: XXXXXXXX-XXXX-XXXX-XXXX-XXXXXXXXXXXX', line) line = re.sub('cid: [0-9]+', 'cid: XXXXXXXXXX', line) -- 2.25.3 Signed-off-by: Kevin Wolf <kwolf@redhat.com> Message-Id: <20200424125448.63318-10-kwolf@redhat.com> Reviewed-by: Max Reitz <mreitz@redhat.com> Reviewed-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com> --- tests/qemu-iotests/274 | 155 +++++++++++++++++++++ tests/qemu-iotests/274.out | 268 +++++++++++++++++++++++++++++++++++++ tests/qemu-iotests/group | 1 + 3 files changed, 424 insertions(+) create mode 100755 tests/qemu-iotests/274 create mode 100644 tests/qemu-iotests/274.out diff --git a/tests/qemu-iotests/274 b/tests/qemu-iotests/274 new file mode 100755 index XXXXXXX..XXXXXXX --- /dev/null +++ b/tests/qemu-iotests/274 @@ -XXX,XX +XXX,XX @@ +#!/usr/bin/env python3 +# +# Copyright (C) 2019 Red Hat, Inc. +# +# This program is free software; you can redistribute it and/or modify +# it under the terms of the GNU General Public License as published by +# the Free Software Foundation; either version 2 of the License, or +# (at your option) any later version. +# +# This program is distributed in the hope that it will be useful, +# but WITHOUT ANY WARRANTY; without even the implied warranty of +# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +# GNU General Public License for more details. +# +# You should have received a copy of the GNU General Public License +# along with this program. If not, see <http://www.gnu.org/licenses/>. +# +# Creator/Owner: Kevin Wolf <kwolf@redhat.com> +# +# Some tests for short backing files and short overlays + +import iotests + +iotests.verify_image_format(supported_fmts=['qcow2']) +iotests.verify_platform(['linux']) + +size_short = 1 * 1024 * 1024 +size_long = 2 * 1024 * 1024 +size_diff = size_long - size_short + +def create_chain() -> None: + iotests.qemu_img_log('create', '-f', iotests.imgfmt, base, + str(size_long)) + iotests.qemu_img_log('create', '-f', iotests.imgfmt, '-b', base, mid, + str(size_short)) + iotests.qemu_img_log('create', '-f', iotests.imgfmt, '-b', mid, top, + str(size_long)) + + iotests.qemu_io_log('-c', 'write -P 1 0 %d' % size_long, base) + +def create_vm() -> iotests.VM: + vm = iotests.VM() + vm.add_blockdev('file,filename=%s,node-name=base-file' % base) + vm.add_blockdev('%s,file=base-file,node-name=base' % iotests.imgfmt) + vm.add_blockdev('file,filename=%s,node-name=mid-file' % mid) + vm.add_blockdev('%s,file=mid-file,node-name=mid,backing=base' + % iotests.imgfmt) + vm.add_drive(top, 'backing=mid,node-name=top') + return vm + +with iotests.FilePath('base') as base, \ + iotests.FilePath('mid') as mid, \ + iotests.FilePath('top') as top: + + iotests.log('== Commit tests ==') + + create_chain() + + iotests.log('=== Check visible data ===') + + iotests.qemu_io_log('-c', 'read -P 1 0 %d' % size_short, top) + iotests.qemu_io_log('-c', 'read -P 0 %d %d' % (size_short, size_diff), top) + + iotests.log('=== Checking allocation status ===') + + iotests.qemu_io_log('-c', 'alloc 0 %d' % size_short, + '-c', 'alloc %d %d' % (size_short, size_diff), + base) + + iotests.qemu_io_log('-c', 'alloc 0 %d' % size_short, + '-c', 'alloc %d %d' % (size_short, size_diff), + mid) + + iotests.qemu_io_log('-c', 'alloc 0 %d' % size_short, + '-c', 'alloc %d %d' % (size_short, size_diff), + top) + + iotests.log('=== Checking map ===') + + iotests.qemu_img_log('map', '--output=json', base) + iotests.qemu_img_log('map', '--output=human', base) + iotests.qemu_img_log('map', '--output=json', mid) + iotests.qemu_img_log('map', '--output=human', mid) + iotests.qemu_img_log('map', '--output=json', top) + iotests.qemu_img_log('map', '--output=human', top) + + iotests.log('=== Testing qemu-img commit (top -> mid) ===') + + iotests.qemu_img_log('commit', top) + iotests.img_info_log(mid) + iotests.qemu_io_log('-c', 'read -P 1 0 %d' % size_short, mid) + iotests.qemu_io_log('-c', 'read -P 0 %d %d' % (size_short, size_diff), mid) + + iotests.log('=== Testing HMP commit (top -> mid) ===') + + create_chain() + with create_vm() as vm: + vm.launch() + vm.qmp_log('human-monitor-command', command_line='commit drive0') + + iotests.img_info_log(mid) + iotests.qemu_io_log('-c', 'read -P 1 0 %d' % size_short, mid) + iotests.qemu_io_log('-c', 'read -P 0 %d %d' % (size_short, size_diff), mid) + + iotests.log('=== Testing QMP active commit (top -> mid) ===') + + create_chain() + with create_vm() as vm: + vm.launch() + vm.qmp_log('block-commit', device='top', base_node='mid', + job_id='job0', auto_dismiss=False) + vm.run_job('job0', wait=5) + + iotests.img_info_log(mid) + iotests.qemu_io_log('-c', 'read -P 1 0 %d' % size_short, mid) + iotests.qemu_io_log('-c', 'read -P 0 %d %d' % (size_short, size_diff), mid) + + + iotests.log('== Resize tests ==') + + # Use different sizes for different allocation modes: + # + # We want to have at least one test where 32 bit truncation in the size of + # the overlapping area becomes visible. This is covered by the + # prealloc='off' case (1G to 6G is an overlap of 5G). + # + # However, we can only do this for modes that don't preallocate data + # because otherwise we might run out of space on the test host. + # + # We also want to test some unaligned combinations. + for (prealloc, base_size, top_size_old, top_size_new, off) in [ + ('off', '6G', '1G', '8G', '5G'), + ('metadata', '32G', '30G', '33G', '31G'), + ('falloc', '10M', '5M', '15M', '9M'), + ('full', '16M', '8M', '12M', '11M'), + ('off', '384k', '253k', '512k', '253k'), + ('off', '400k', '256k', '512k', '336k'), + ('off', '512k', '256k', '500k', '436k')]: + + iotests.log('=== preallocation=%s ===' % prealloc) + iotests.qemu_img_log('create', '-f', iotests.imgfmt, base, base_size) + iotests.qemu_img_log('create', '-f', iotests.imgfmt, '-b', base, top, + top_size_old) + iotests.qemu_io_log('-c', 'write -P 1 %s 64k' % off, base) + + # After this, top_size_old to base_size should be allocated/zeroed. + # + # In theory, leaving base_size to top_size_new unallocated would be + # correct, but in practice, if we zero out anything, we zero out + # everything up to top_size_new. + iotests.qemu_img_log('resize', '-f', iotests.imgfmt, + '--preallocation', prealloc, top, top_size_new) + iotests.qemu_io_log('-c', 'read -P 0 %s 64k' % off, top) + iotests.qemu_io_log('-c', 'map', top) + iotests.qemu_img_log('map', '--output=json', top) diff --git a/tests/qemu-iotests/274.out b/tests/qemu-iotests/274.out new file mode 100644 index XXXXXXX..XXXXXXX --- /dev/null +++ b/tests/qemu-iotests/274.out @@ -XXX,XX +XXX,XX @@ +== Commit tests == +Formatting 'TEST_DIR/PID-base', fmt=qcow2 size=2097152 cluster_size=65536 lazy_refcounts=off refcount_bits=16 + +Formatting 'TEST_DIR/PID-mid', fmt=qcow2 size=1048576 backing_file=TEST_DIR/PID-base cluster_size=65536 lazy_refcounts=off refcount_bits=16 + +Formatting 'TEST_DIR/PID-top', fmt=qcow2 size=2097152 backing_file=TEST_DIR/PID-mid cluster_size=65536 lazy_refcounts=off refcount_bits=16 + +wrote 2097152/2097152 bytes at offset 0 +2 MiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec) + +=== Check visible data === +read 1048576/1048576 bytes at offset 0 +1 MiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec) + +read 1048576/1048576 bytes at offset 1048576 +1 MiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec) + +=== Checking allocation status === +1048576/1048576 bytes allocated at offset 0 bytes +1048576/1048576 bytes allocated at offset 1 MiB + +0/1048576 bytes allocated at offset 0 bytes +0/0 bytes allocated at offset 1 MiB + +0/1048576 bytes allocated at offset 0 bytes +0/1048576 bytes allocated at offset 1 MiB + +=== Checking map === +[{ "start": 0, "length": 2097152, "depth": 0, "zero": false, "data": true, "offset": 327680}] + +Offset Length Mapped to File +0 0x200000 0x50000 TEST_DIR/PID-base + +[{ "start": 0, "length": 1048576, "depth": 1, "zero": false, "data": true, "offset": 327680}] + +Offset Length Mapped to File +0 0x100000 0x50000 TEST_DIR/PID-base + +[{ "start": 0, "length": 1048576, "depth": 2, "zero": false, "data": true, "offset": 327680}, +{ "start": 1048576, "length": 1048576, "depth": 0, "zero": true, "data": false}] + +Offset Length Mapped to File +0 0x100000 0x50000 TEST_DIR/PID-base + +=== Testing qemu-img commit (top -> mid) === +Image committed. + +image: TEST_IMG +file format: IMGFMT +virtual size: 2 MiB (2097152 bytes) +cluster_size: 65536 +backing file: TEST_DIR/PID-base +Format specific information: + compat: 1.1 + lazy refcounts: false + refcount bits: 16 + corrupt: false + +read 1048576/1048576 bytes at offset 0 +1 MiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec) + +read 1048576/1048576 bytes at offset 1048576 +1 MiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec) + +=== Testing HMP commit (top -> mid) === +Formatting 'TEST_DIR/PID-base', fmt=qcow2 size=2097152 cluster_size=65536 lazy_refcounts=off refcount_bits=16 + +Formatting 'TEST_DIR/PID-mid', fmt=qcow2 size=1048576 backing_file=TEST_DIR/PID-base cluster_size=65536 lazy_refcounts=off refcount_bits=16 + +Formatting 'TEST_DIR/PID-top', fmt=qcow2 size=2097152 backing_file=TEST_DIR/PID-mid cluster_size=65536 lazy_refcounts=off refcount_bits=16 + +wrote 2097152/2097152 bytes at offset 0 +2 MiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec) + +{"execute": "human-monitor-command", "arguments": {"command-line": "commit drive0"}} +{"return": ""} +image: TEST_IMG +file format: IMGFMT +virtual size: 2 MiB (2097152 bytes) +cluster_size: 65536 +backing file: TEST_DIR/PID-base +Format specific information: + compat: 1.1 + lazy refcounts: false + refcount bits: 16 + corrupt: false + +read 1048576/1048576 bytes at offset 0 +1 MiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec) + +read 1048576/1048576 bytes at offset 1048576 +1 MiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec) + +=== Testing QMP active commit (top -> mid) === +Formatting 'TEST_DIR/PID-base', fmt=qcow2 size=2097152 cluster_size=65536 lazy_refcounts=off refcount_bits=16 + +Formatting 'TEST_DIR/PID-mid', fmt=qcow2 size=1048576 backing_file=TEST_DIR/PID-base cluster_size=65536 lazy_refcounts=off refcount_bits=16 + +Formatting 'TEST_DIR/PID-top', fmt=qcow2 size=2097152 backing_file=TEST_DIR/PID-mid cluster_size=65536 lazy_refcounts=off refcount_bits=16 + +wrote 2097152/2097152 bytes at offset 0 +2 MiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec) + +{"execute": "block-commit", "arguments": {"auto-dismiss": false, "base-node": "mid", "device": "top", "job-id": "job0"}} +{"return": {}} +{"execute": "job-complete", "arguments": {"id": "job0"}} +{"return": {}} +{"data": {"device": "job0", "len": 0, "offset": 0, "speed": 0, "type": "commit"}, "event": "BLOCK_JOB_READY", "timestamp": {"microseconds": "USECS", "seconds": "SECS"}} +{"data": {"device": "job0", "len": 0, "offset": 0, "speed": 0, "type": "commit"}, "event": "BLOCK_JOB_COMPLETED", "timestamp": {"microseconds": "USECS", "seconds": "SECS"}} +{"execute": "job-dismiss", "arguments": {"id": "job0"}} +{"return": {}} +image: TEST_IMG +file format: IMGFMT +virtual size: 2 MiB (2097152 bytes) +cluster_size: 65536 +backing file: TEST_DIR/PID-base +Format specific information: + compat: 1.1 + lazy refcounts: false + refcount bits: 16 + corrupt: false + +read 1048576/1048576 bytes at offset 0 +1 MiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec) + +read 1048576/1048576 bytes at offset 1048576 +1 MiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec) + +== Resize tests == +=== preallocation=off === +Formatting 'TEST_DIR/PID-base', fmt=qcow2 size=6442450944 cluster_size=65536 lazy_refcounts=off refcount_bits=16 + +Formatting 'TEST_DIR/PID-top', fmt=qcow2 size=1073741824 backing_file=TEST_DIR/PID-base cluster_size=65536 lazy_refcounts=off refcount_bits=16 + +wrote 65536/65536 bytes at offset 5368709120 +64 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec) + +Image resized. + +read 65536/65536 bytes at offset 5368709120 +64 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec) + +1 GiB (0x40000000) bytes not allocated at offset 0 bytes (0x0) +7 GiB (0x1c0000000) bytes allocated at offset 1 GiB (0x40000000) + +[{ "start": 0, "length": 1073741824, "depth": 1, "zero": true, "data": false}, +{ "start": 1073741824, "length": 7516192768, "depth": 0, "zero": true, "data": false}] + +=== preallocation=metadata === +Formatting 'TEST_DIR/PID-base', fmt=qcow2 size=34359738368 cluster_size=65536 lazy_refcounts=off refcount_bits=16 + +Formatting 'TEST_DIR/PID-top', fmt=qcow2 size=32212254720 backing_file=TEST_DIR/PID-base cluster_size=65536 lazy_refcounts=off refcount_bits=16 + +wrote 65536/65536 bytes at offset 33285996544 +64 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec) + +Image resized. + +read 65536/65536 bytes at offset 33285996544 +64 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec) + +30 GiB (0x780000000) bytes not allocated at offset 0 bytes (0x0) +3 GiB (0xc0000000) bytes allocated at offset 30 GiB (0x780000000) + +[{ "start": 0, "length": 32212254720, "depth": 1, "zero": true, "data": false}, +{ "start": 32212254720, "length": 536870912, "depth": 0, "zero": true, "data": false, "offset": 327680}, +{ "start": 32749125632, "length": 536870912, "depth": 0, "zero": true, "data": false, "offset": 537264128}, +{ "start": 33285996544, "length": 536870912, "depth": 0, "zero": true, "data": false, "offset": 1074200576}, +{ "start": 33822867456, "length": 536870912, "depth": 0, "zero": true, "data": false, "offset": 1611137024}, +{ "start": 34359738368, "length": 536870912, "depth": 0, "zero": true, "data": false, "offset": 2148139008}, +{ "start": 34896609280, "length": 536870912, "depth": 0, "zero": true, "data": false, "offset": 2685075456}] + +=== preallocation=falloc === +Formatting 'TEST_DIR/PID-base', fmt=qcow2 size=10485760 cluster_size=65536 lazy_refcounts=off refcount_bits=16 + +Formatting 'TEST_DIR/PID-top', fmt=qcow2 size=5242880 backing_file=TEST_DIR/PID-base cluster_size=65536 lazy_refcounts=off refcount_bits=16 + +wrote 65536/65536 bytes at offset 9437184 +64 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec) + +Image resized. + +read 65536/65536 bytes at offset 9437184 +64 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec) + +5 MiB (0x500000) bytes not allocated at offset 0 bytes (0x0) +10 MiB (0xa00000) bytes allocated at offset 5 MiB (0x500000) + +[{ "start": 0, "length": 5242880, "depth": 1, "zero": true, "data": false}, +{ "start": 5242880, "length": 10485760, "depth": 0, "zero": true, "data": false, "offset": 327680}] + +=== preallocation=full === +Formatting 'TEST_DIR/PID-base', fmt=qcow2 size=16777216 cluster_size=65536 lazy_refcounts=off refcount_bits=16 + +Formatting 'TEST_DIR/PID-top', fmt=qcow2 size=8388608 backing_file=TEST_DIR/PID-base cluster_size=65536 lazy_refcounts=off refcount_bits=16 + +wrote 65536/65536 bytes at offset 11534336 +64 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec) + +Image resized. + +read 65536/65536 bytes at offset 11534336 +64 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec) + +8 MiB (0x800000) bytes not allocated at offset 0 bytes (0x0) +4 MiB (0x400000) bytes allocated at offset 8 MiB (0x800000) + +[{ "start": 0, "length": 8388608, "depth": 1, "zero": true, "data": false}, +{ "start": 8388608, "length": 4194304, "depth": 0, "zero": true, "data": false, "offset": 327680}] + +=== preallocation=off === +Formatting 'TEST_DIR/PID-base', fmt=qcow2 size=393216 cluster_size=65536 lazy_refcounts=off refcount_bits=16 + +Formatting 'TEST_DIR/PID-top', fmt=qcow2 size=259072 backing_file=TEST_DIR/PID-base cluster_size=65536 lazy_refcounts=off refcount_bits=16 + +wrote 65536/65536 bytes at offset 259072 +64 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec) + +Image resized. + +read 65536/65536 bytes at offset 259072 +64 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec) + +192 KiB (0x30000) bytes not allocated at offset 0 bytes (0x0) +320 KiB (0x50000) bytes allocated at offset 192 KiB (0x30000) + +[{ "start": 0, "length": 196608, "depth": 1, "zero": true, "data": false}, +{ "start": 196608, "length": 65536, "depth": 0, "zero": false, "data": true, "offset": 327680}, +{ "start": 262144, "length": 262144, "depth": 0, "zero": true, "data": false}] + +=== preallocation=off === +Formatting 'TEST_DIR/PID-base', fmt=qcow2 size=409600 cluster_size=65536 lazy_refcounts=off refcount_bits=16 + +Formatting 'TEST_DIR/PID-top', fmt=qcow2 size=262144 backing_file=TEST_DIR/PID-base cluster_size=65536 lazy_refcounts=off refcount_bits=16 + +wrote 65536/65536 bytes at offset 344064 +64 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec) + +Image resized. + +read 65536/65536 bytes at offset 344064 +64 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec) + +256 KiB (0x40000) bytes not allocated at offset 0 bytes (0x0) +256 KiB (0x40000) bytes allocated at offset 256 KiB (0x40000) + +[{ "start": 0, "length": 262144, "depth": 1, "zero": true, "data": false}, +{ "start": 262144, "length": 262144, "depth": 0, "zero": true, "data": false}] + +=== preallocation=off === +Formatting 'TEST_DIR/PID-base', fmt=qcow2 size=524288 cluster_size=65536 lazy_refcounts=off refcount_bits=16 + +Formatting 'TEST_DIR/PID-top', fmt=qcow2 size=262144 backing_file=TEST_DIR/PID-base cluster_size=65536 lazy_refcounts=off refcount_bits=16 + +wrote 65536/65536 bytes at offset 446464 +64 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec) + +Image resized. + +read 65536/65536 bytes at offset 446464 +64 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec) + +256 KiB (0x40000) bytes not allocated at offset 0 bytes (0x0) +244 KiB (0x3d000) bytes allocated at offset 256 KiB (0x40000) + +[{ "start": 0, "length": 262144, "depth": 1, "zero": true, "data": false}, +{ "start": 262144, "length": 249856, "depth": 0, "zero": true, "data": false}] + diff --git a/tests/qemu-iotests/group b/tests/qemu-iotests/group index XXXXXXX..XXXXXXX 100644 --- a/tests/qemu-iotests/group +++ b/tests/qemu-iotests/group @@ -XXX,XX +XXX,XX @@ 270 rw backing quick 272 rw 273 backing quick +274 rw backing 277 rw quick 279 rw backing quick 280 rw migration quick -- 2.25.3 The BDRV_REQ_ZERO_WRITE is currently implemented in a way that first the image is possibly preallocated and then the zero flag is added to all clusters. This means that a copy-on-write operation may be needed when writing to these clusters, despite having used preallocation, negating one of the major benefits of preallocation. Instead, try to forward the BDRV_REQ_ZERO_WRITE to the protocol driver, and if the protocol driver can ensure that the new area reads as zeros, we can skip setting the zero flag in the qcow2 layer. Unfortunately, the same approach doesn't work for metadata preallocation, so we'll still set the zero flag there. Signed-off-by: Kevin Wolf <kwolf@redhat.com> Reviewed-by: Max Reitz <mreitz@redhat.com> Message-Id: <20200424142701.67053-1-kwolf@redhat.com> Reviewed-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com> --- block/qcow2.c | 22 +++++++++++++++++++--- tests/qemu-iotests/274.out | 4 ++-- 2 files changed, 21 insertions(+), 5 deletions(-) diff --git a/block/qcow2.c b/block/qcow2.c index XXXXXXX..XXXXXXX 100644 --- a/block/qcow2.c +++ b/block/qcow2.c @@ -XXX,XX +XXX,XX @@ static int coroutine_fn qcow2_co_truncate(BlockDriverState *bs, int64_t offset, /* Allocate the data area */ new_file_size = allocation_start + nb_new_data_clusters * s->cluster_size; - /* Image file grows, so @exact does not matter */ - ret = bdrv_co_truncate(bs->file, new_file_size, false, prealloc, 0, - errp); + /* + * Image file grows, so @exact does not matter. + * + * If we need to zero out the new area, try first whether the protocol + * driver can already take care of this. + */ + if (flags & BDRV_REQ_ZERO_WRITE) { + ret = bdrv_co_truncate(bs->file, new_file_size, false, prealloc, + BDRV_REQ_ZERO_WRITE, NULL); + if (ret >= 0) { + flags &= ~BDRV_REQ_ZERO_WRITE; + } + } else { + ret = -1; + } + if (ret < 0) { + ret = bdrv_co_truncate(bs->file, new_file_size, false, prealloc, 0, + errp); + } if (ret < 0) { error_prepend(errp, "Failed to resize underlying file: "); qcow2_free_clusters(bs, allocation_start, diff --git a/tests/qemu-iotests/274.out b/tests/qemu-iotests/274.out index XXXXXXX..XXXXXXX 100644 --- a/tests/qemu-iotests/274.out +++ b/tests/qemu-iotests/274.out @@ -XXX,XX +XXX,XX @@ read 65536/65536 bytes at offset 9437184 10 MiB (0xa00000) bytes allocated at offset 5 MiB (0x500000) [{ "start": 0, "length": 5242880, "depth": 1, "zero": true, "data": false}, -{ "start": 5242880, "length": 10485760, "depth": 0, "zero": true, "data": false, "offset": 327680}] +{ "start": 5242880, "length": 10485760, "depth": 0, "zero": false, "data": true, "offset": 327680}] === preallocation=full === Formatting 'TEST_DIR/PID-base', fmt=qcow2 size=16777216 cluster_size=65536 lazy_refcounts=off refcount_bits=16 @@ -XXX,XX +XXX,XX @@ read 65536/65536 bytes at offset 11534336 4 MiB (0x400000) bytes allocated at offset 8 MiB (0x800000) [{ "start": 0, "length": 8388608, "depth": 1, "zero": true, "data": false}, -{ "start": 8388608, "length": 4194304, "depth": 0, "zero": true, "data": false, "offset": 327680}] +{ "start": 8388608, "length": 4194304, "depth": 0, "zero": false, "data": true, "offset": 327680}] === preallocation=off === Formatting 'TEST_DIR/PID-base', fmt=qcow2 size=393216 cluster_size=65536 lazy_refcounts=off refcount_bits=16 -- 2.25.3 From: Andrzej Jakowski <andrzej.jakowski@linux.intel.com> This patch introduces support for PMR that has been defined as part of NVMe 1.4 spec. User can now specify a pmrdev option that should point to HostMemoryBackend. pmrdev memory region will subsequently be exposed as PCI BAR 2 in emulated NVMe device. Guest OS can perform mmio read and writes to the PMR region that will stay persistent across system reboot. Signed-off-by: Andrzej Jakowski <andrzej.jakowski@linux.intel.com> Reviewed-by: Klaus Jensen <k.jensen@samsung.com> Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com> Message-Id: <20200330164656.9348-1-andrzej.jakowski@linux.intel.com> Reviewed-by: Keith Busch <kbusch@kernel.org> Signed-off-by: Kevin Wolf <kwolf@redhat.com> --- hw/block/nvme.h | 2 + include/block/nvme.h | 172 +++++++++++++++++++++++++++++++++++++++++ hw/block/nvme.c | 109 ++++++++++++++++++++++++++ hw/block/Makefile.objs | 2 +- hw/block/trace-events | 4 + 5 files changed, 288 insertions(+), 1 deletion(-) diff --git a/hw/block/nvme.h b/hw/block/nvme.h index XXXXXXX..XXXXXXX 100644 --- a/hw/block/nvme.h +++ b/hw/block/nvme.h @@ -XXX,XX +XXX,XX @@ typedef struct NvmeCtrl { uint64_t timestamp_set_qemu_clock_ms; /* QEMU clock time */ char *serial; + HostMemoryBackend *pmrdev; + NvmeNamespace *namespaces; NvmeSQueue **sq; NvmeCQueue **cq; diff --git a/include/block/nvme.h b/include/block/nvme.h index XXXXXXX..XXXXXXX 100644 --- a/include/block/nvme.h +++ b/include/block/nvme.h @@ -XXX,XX +XXX,XX @@ typedef struct NvmeBar { uint64_t acq; uint32_t cmbloc; uint32_t cmbsz; + uint8_t padding[3520]; /* not used by QEMU */ + uint32_t pmrcap; + uint32_t pmrctl; + uint32_t pmrsts; + uint32_t pmrebs; + uint32_t pmrswtp; + uint32_t pmrmsc; } NvmeBar; enum NvmeCapShift { @@ -XXX,XX +XXX,XX @@ enum NvmeCapShift { CAP_CSS_SHIFT = 37, CAP_MPSMIN_SHIFT = 48, CAP_MPSMAX_SHIFT = 52, + CAP_PMR_SHIFT = 56, }; enum NvmeCapMask { @@ -XXX,XX +XXX,XX @@ enum NvmeCapMask { CAP_CSS_MASK = 0xff, CAP_MPSMIN_MASK = 0xf, CAP_MPSMAX_MASK = 0xf, + CAP_PMR_MASK = 0x1, }; #define NVME_CAP_MQES(cap) (((cap) >> CAP_MQES_SHIFT) & CAP_MQES_MASK) @@ -XXX,XX +XXX,XX @@ enum NvmeCapMask { << CAP_MPSMIN_SHIFT) #define NVME_CAP_SET_MPSMAX(cap, val) (cap |= (uint64_t)(val & CAP_MPSMAX_MASK)\ << CAP_MPSMAX_SHIFT) +#define NVME_CAP_SET_PMRS(cap, val) (cap |= (uint64_t)(val & CAP_PMR_MASK)\ + << CAP_PMR_SHIFT) enum NvmeCcShift { CC_EN_SHIFT = 0, @@ -XXX,XX +XXX,XX @@ enum NvmeCmbszMask { #define NVME_CMBSZ_GETSIZE(cmbsz) \ (NVME_CMBSZ_SZ(cmbsz) * (1 << (12 + 4 * NVME_CMBSZ_SZU(cmbsz)))) +enum NvmePmrcapShift { + PMRCAP_RDS_SHIFT = 3, + PMRCAP_WDS_SHIFT = 4, + PMRCAP_BIR_SHIFT = 5, + PMRCAP_PMRTU_SHIFT = 8, + PMRCAP_PMRWBM_SHIFT = 10, + PMRCAP_PMRTO_SHIFT = 16, + PMRCAP_CMSS_SHIFT = 24, +}; + +enum NvmePmrcapMask { + PMRCAP_RDS_MASK = 0x1, + PMRCAP_WDS_MASK = 0x1, + PMRCAP_BIR_MASK = 0x7, + PMRCAP_PMRTU_MASK = 0x3, + PMRCAP_PMRWBM_MASK = 0xf, + PMRCAP_PMRTO_MASK = 0xff, + PMRCAP_CMSS_MASK = 0x1, +}; + +#define NVME_PMRCAP_RDS(pmrcap) \ + ((pmrcap >> PMRCAP_RDS_SHIFT) & PMRCAP_RDS_MASK) +#define NVME_PMRCAP_WDS(pmrcap) \ + ((pmrcap >> PMRCAP_WDS_SHIFT) & PMRCAP_WDS_MASK) +#define NVME_PMRCAP_BIR(pmrcap) \ + ((pmrcap >> PMRCAP_BIR_SHIFT) & PMRCAP_BIR_MASK) +#define NVME_PMRCAP_PMRTU(pmrcap) \ + ((pmrcap >> PMRCAP_PMRTU_SHIFT) & PMRCAP_PMRTU_MASK) +#define NVME_PMRCAP_PMRWBM(pmrcap) \ + ((pmrcap >> PMRCAP_PMRWBM_SHIFT) & PMRCAP_PMRWBM_MASK) +#define NVME_PMRCAP_PMRTO(pmrcap) \ + ((pmrcap >> PMRCAP_PMRTO_SHIFT) & PMRCAP_PMRTO_MASK) +#define NVME_PMRCAP_CMSS(pmrcap) \ + ((pmrcap >> PMRCAP_CMSS_SHIFT) & PMRCAP_CMSS_MASK) + +#define NVME_PMRCAP_SET_RDS(pmrcap, val) \ + (pmrcap |= (uint64_t)(val & PMRCAP_RDS_MASK) << PMRCAP_RDS_SHIFT) +#define NVME_PMRCAP_SET_WDS(pmrcap, val) \ + (pmrcap |= (uint64_t)(val & PMRCAP_WDS_MASK) << PMRCAP_WDS_SHIFT) +#define NVME_PMRCAP_SET_BIR(pmrcap, val) \ + (pmrcap |= (uint64_t)(val & PMRCAP_BIR_MASK) << PMRCAP_BIR_SHIFT) +#define NVME_PMRCAP_SET_PMRTU(pmrcap, val) \ + (pmrcap |= (uint64_t)(val & PMRCAP_PMRTU_MASK) << PMRCAP_PMRTU_SHIFT) +#define NVME_PMRCAP_SET_PMRWBM(pmrcap, val) \ + (pmrcap |= (uint64_t)(val & PMRCAP_PMRWBM_MASK) << PMRCAP_PMRWBM_SHIFT) +#define NVME_PMRCAP_SET_PMRTO(pmrcap, val) \ + (pmrcap |= (uint64_t)(val & PMRCAP_PMRTO_MASK) << PMRCAP_PMRTO_SHIFT) +#define NVME_PMRCAP_SET_CMSS(pmrcap, val) \ + (pmrcap |= (uint64_t)(val & PMRCAP_CMSS_MASK) << PMRCAP_CMSS_SHIFT) + +enum NvmePmrctlShift { + PMRCTL_EN_SHIFT = 0, +}; + +enum NvmePmrctlMask { + PMRCTL_EN_MASK = 0x1, +}; + +#define NVME_PMRCTL_EN(pmrctl) ((pmrctl >> PMRCTL_EN_SHIFT) & PMRCTL_EN_MASK) + +#define NVME_PMRCTL_SET_EN(pmrctl, val) \ + (pmrctl |= (uint64_t)(val & PMRCTL_EN_MASK) << PMRCTL_EN_SHIFT) + +enum NvmePmrstsShift { + PMRSTS_ERR_SHIFT = 0, + PMRSTS_NRDY_SHIFT = 8, + PMRSTS_HSTS_SHIFT = 9, + PMRSTS_CBAI_SHIFT = 12, +}; + +enum NvmePmrstsMask { + PMRSTS_ERR_MASK = 0xff, + PMRSTS_NRDY_MASK = 0x1, + PMRSTS_HSTS_MASK = 0x7, + PMRSTS_CBAI_MASK = 0x1, +}; + +#define NVME_PMRSTS_ERR(pmrsts) \ + ((pmrsts >> PMRSTS_ERR_SHIFT) & PMRSTS_ERR_MASK) +#define NVME_PMRSTS_NRDY(pmrsts) \ + ((pmrsts >> PMRSTS_NRDY_SHIFT) & PMRSTS_NRDY_MASK) +#define NVME_PMRSTS_HSTS(pmrsts) \ + ((pmrsts >> PMRSTS_HSTS_SHIFT) & PMRSTS_HSTS_MASK) +#define NVME_PMRSTS_CBAI(pmrsts) \ + ((pmrsts >> PMRSTS_CBAI_SHIFT) & PMRSTS_CBAI_MASK) + +#define NVME_PMRSTS_SET_ERR(pmrsts, val) \ + (pmrsts |= (uint64_t)(val & PMRSTS_ERR_MASK) << PMRSTS_ERR_SHIFT) +#define NVME_PMRSTS_SET_NRDY(pmrsts, val) \ + (pmrsts |= (uint64_t)(val & PMRSTS_NRDY_MASK) << PMRSTS_NRDY_SHIFT) +#define NVME_PMRSTS_SET_HSTS(pmrsts, val) \ + (pmrsts |= (uint64_t)(val & PMRSTS_HSTS_MASK) << PMRSTS_HSTS_SHIFT) +#define NVME_PMRSTS_SET_CBAI(pmrsts, val) \ + (pmrsts |= (uint64_t)(val & PMRSTS_CBAI_MASK) << PMRSTS_CBAI_SHIFT) + +enum NvmePmrebsShift { + PMREBS_PMRSZU_SHIFT = 0, + PMREBS_RBB_SHIFT = 4, + PMREBS_PMRWBZ_SHIFT = 8, +}; + +enum NvmePmrebsMask { + PMREBS_PMRSZU_MASK = 0xf, + PMREBS_RBB_MASK = 0x1, + PMREBS_PMRWBZ_MASK = 0xffffff, +}; + +#define NVME_PMREBS_PMRSZU(pmrebs) \ + ((pmrebs >> PMREBS_PMRSZU_SHIFT) & PMREBS_PMRSZU_MASK) +#define NVME_PMREBS_RBB(pmrebs) \ + ((pmrebs >> PMREBS_RBB_SHIFT) & PMREBS_RBB_MASK) +#define NVME_PMREBS_PMRWBZ(pmrebs) \ + ((pmrebs >> PMREBS_PMRWBZ_SHIFT) & PMREBS_PMRWBZ_MASK) + +#define NVME_PMREBS_SET_PMRSZU(pmrebs, val) \ + (pmrebs |= (uint64_t)(val & PMREBS_PMRSZU_MASK) << PMREBS_PMRSZU_SHIFT) +#define NVME_PMREBS_SET_RBB(pmrebs, val) \ + (pmrebs |= (uint64_t)(val & PMREBS_RBB_MASK) << PMREBS_RBB_SHIFT) +#define NVME_PMREBS_SET_PMRWBZ(pmrebs, val) \ + (pmrebs |= (uint64_t)(val & PMREBS_PMRWBZ_MASK) << PMREBS_PMRWBZ_SHIFT) + +enum NvmePmrswtpShift { + PMRSWTP_PMRSWTU_SHIFT = 0, + PMRSWTP_PMRSWTV_SHIFT = 8, +}; + +enum NvmePmrswtpMask { + PMRSWTP_PMRSWTU_MASK = 0xf, + PMRSWTP_PMRSWTV_MASK = 0xffffff, +}; + +#define NVME_PMRSWTP_PMRSWTU(pmrswtp) \ + ((pmrswtp >> PMRSWTP_PMRSWTU_SHIFT) & PMRSWTP_PMRSWTU_MASK) +#define NVME_PMRSWTP_PMRSWTV(pmrswtp) \ + ((pmrswtp >> PMRSWTP_PMRSWTV_SHIFT) & PMRSWTP_PMRSWTV_MASK) + +#define NVME_PMRSWTP_SET_PMRSWTU(pmrswtp, val) \ + (pmrswtp |= (uint64_t)(val & PMRSWTP_PMRSWTU_MASK) << PMRSWTP_PMRSWTU_SHIFT) +#define NVME_PMRSWTP_SET_PMRSWTV(pmrswtp, val) \ + (pmrswtp |= (uint64_t)(val & PMRSWTP_PMRSWTV_MASK) << PMRSWTP_PMRSWTV_SHIFT) + +enum NvmePmrmscShift { + PMRMSC_CMSE_SHIFT = 1, + PMRMSC_CBA_SHIFT = 12, +}; + +enum NvmePmrmscMask { + PMRMSC_CMSE_MASK = 0x1, + PMRMSC_CBA_MASK = 0xfffffffffffff, +}; + +#define NVME_PMRMSC_CMSE(pmrmsc) \ + ((pmrmsc >> PMRMSC_CMSE_SHIFT) & PMRMSC_CMSE_MASK) +#define NVME_PMRMSC_CBA(pmrmsc) \ + ((pmrmsc >> PMRMSC_CBA_SHIFT) & PMRMSC_CBA_MASK) + +#define NVME_PMRMSC_SET_CMSE(pmrmsc, val) \ + (pmrmsc |= (uint64_t)(val & PMRMSC_CMSE_MASK) << PMRMSC_CMSE_SHIFT) +#define NVME_PMRMSC_SET_CBA(pmrmsc, val) \ + (pmrmsc |= (uint64_t)(val & PMRMSC_CBA_MASK) << PMRMSC_CBA_SHIFT) + typedef struct NvmeCmd { uint8_t opcode; uint8_t fuse; diff --git a/hw/block/nvme.c b/hw/block/nvme.c index XXXXXXX..XXXXXXX 100644 --- a/hw/block/nvme.c +++ b/hw/block/nvme.c @@ -XXX,XX +XXX,XX @@ * -drive file=<file>,if=none,id=<drive_id> * -device nvme,drive=<drive_id>,serial=<serial>,id=<id[optional]>, \ * cmb_size_mb=<cmb_size_mb[optional]>, \ + * [pmrdev=<mem_backend_file_id>,] \ * num_queues=<N[optional]> * * Note cmb_size_mb denotes size of CMB in MB. CMB is assumed to be at * offset 0 in BAR2 and supports only WDS, RDS and SQS for now. + * + * cmb_size_mb= and pmrdev= options are mutually exclusive due to limitation + * in available BAR's. cmb_size_mb= will take precedence over pmrdev= when + * both provided. + * Enabling pmr emulation can be achieved by pointing to memory-backend-file. + * For example: + * -object memory-backend-file,id=<mem_id>,share=on,mem-path=<file_path>, \ + * size=<size> .... -device nvme,...,pmrdev=<mem_id> */ #include "qemu/osdep.h" @@ -XXX,XX +XXX,XX @@ #include "sysemu/sysemu.h" #include "qapi/error.h" #include "qapi/visitor.h" +#include "sysemu/hostmem.h" #include "sysemu/block-backend.h" +#include "exec/ram_addr.h" #include "qemu/log.h" #include "qemu/module.h" @@ -XXX,XX +XXX,XX @@ static void nvme_write_bar(NvmeCtrl *n, hwaddr offset, uint64_t data, NVME_GUEST_ERR(nvme_ub_mmiowr_cmbsz_readonly, "invalid write to read only CMBSZ, ignored"); return; + case 0xE00: /* PMRCAP */ + NVME_GUEST_ERR(nvme_ub_mmiowr_pmrcap_readonly, + "invalid write to PMRCAP register, ignored"); + return; + case 0xE04: /* TODO PMRCTL */ + break; + case 0xE08: /* PMRSTS */ + NVME_GUEST_ERR(nvme_ub_mmiowr_pmrsts_readonly, + "invalid write to PMRSTS register, ignored"); + return; + case 0xE0C: /* PMREBS */ + NVME_GUEST_ERR(nvme_ub_mmiowr_pmrebs_readonly, + "invalid write to PMREBS register, ignored"); + return; + case 0xE10: /* PMRSWTP */ + NVME_GUEST_ERR(nvme_ub_mmiowr_pmrswtp_readonly, + "invalid write to PMRSWTP register, ignored"); + return; + case 0xE14: /* TODO PMRMSC */ + break; default: NVME_GUEST_ERR(nvme_ub_mmiowr_invalid, "invalid MMIO write," @@ -XXX,XX +XXX,XX @@ static uint64_t nvme_mmio_read(void *opaque, hwaddr addr, unsigned size) } if (addr < sizeof(n->bar)) { + /* + * When PMRWBM bit 1 is set then read from + * from PMRSTS should ensure prior writes + * made it to persistent media + */ + if (addr == 0xE08 && + (NVME_PMRCAP_PMRWBM(n->bar.pmrcap) & 0x02)) { + qemu_ram_writeback(n->pmrdev->mr.ram_block, + 0, n->pmrdev->size); + } memcpy(&val, ptr + addr, size); } else { NVME_GUEST_ERR(nvme_ub_mmiord_invalid_ofs, @@ -XXX,XX +XXX,XX @@ static void nvme_realize(PCIDevice *pci_dev, Error **errp) error_setg(errp, "serial property not set"); return; } + + if (!n->cmb_size_mb && n->pmrdev) { + if (host_memory_backend_is_mapped(n->pmrdev)) { + char *path = object_get_canonical_path_component(OBJECT(n->pmrdev)); + error_setg(errp, "can't use already busy memdev: %s", path); + g_free(path); + return; + } + + if (!is_power_of_2(n->pmrdev->size)) { + error_setg(errp, "pmr backend size needs to be power of 2 in size"); + return; + } + + host_memory_backend_set_mapped(n->pmrdev, true); + } + blkconf_blocksizes(&n->conf); if (!blkconf_apply_backend_options(&n->conf, blk_is_read_only(n->conf.blk), false, errp)) { @@ -XXX,XX +XXX,XX @@ static void nvme_realize(PCIDevice *pci_dev, Error **errp) PCI_BASE_ADDRESS_SPACE_MEMORY | PCI_BASE_ADDRESS_MEM_TYPE_64 | PCI_BASE_ADDRESS_MEM_PREFETCH, &n->ctrl_mem); + } else if (n->pmrdev) { + /* Controller Capabilities register */ + NVME_CAP_SET_PMRS(n->bar.cap, 1); + + /* PMR Capabities register */ + n->bar.pmrcap = 0; + NVME_PMRCAP_SET_RDS(n->bar.pmrcap, 0); + NVME_PMRCAP_SET_WDS(n->bar.pmrcap, 0); + NVME_PMRCAP_SET_BIR(n->bar.pmrcap, 2); + NVME_PMRCAP_SET_PMRTU(n->bar.pmrcap, 0); + /* Turn on bit 1 support */ + NVME_PMRCAP_SET_PMRWBM(n->bar.pmrcap, 0x02); + NVME_PMRCAP_SET_PMRTO(n->bar.pmrcap, 0); + NVME_PMRCAP_SET_CMSS(n->bar.pmrcap, 0); + + /* PMR Control register */ + n->bar.pmrctl = 0; + NVME_PMRCTL_SET_EN(n->bar.pmrctl, 0); + + /* PMR Status register */ + n->bar.pmrsts = 0; + NVME_PMRSTS_SET_ERR(n->bar.pmrsts, 0); + NVME_PMRSTS_SET_NRDY(n->bar.pmrsts, 0); + NVME_PMRSTS_SET_HSTS(n->bar.pmrsts, 0); + NVME_PMRSTS_SET_CBAI(n->bar.pmrsts, 0); + + /* PMR Elasticity Buffer Size register */ + n->bar.pmrebs = 0; + NVME_PMREBS_SET_PMRSZU(n->bar.pmrebs, 0); + NVME_PMREBS_SET_RBB(n->bar.pmrebs, 0); + NVME_PMREBS_SET_PMRWBZ(n->bar.pmrebs, 0); + + /* PMR Sustained Write Throughput register */ + n->bar.pmrswtp = 0; + NVME_PMRSWTP_SET_PMRSWTU(n->bar.pmrswtp, 0); + NVME_PMRSWTP_SET_PMRSWTV(n->bar.pmrswtp, 0); + + /* PMR Memory Space Control register */ + n->bar.pmrmsc = 0; + NVME_PMRMSC_SET_CMSE(n->bar.pmrmsc, 0); + NVME_PMRMSC_SET_CBA(n->bar.pmrmsc, 0); + + pci_register_bar(pci_dev, NVME_PMRCAP_BIR(n->bar.pmrcap), + PCI_BASE_ADDRESS_SPACE_MEMORY | PCI_BASE_ADDRESS_MEM_TYPE_64 | + PCI_BASE_ADDRESS_MEM_PREFETCH, &n->pmrdev->mr); } for (i = 0; i < n->num_namespaces; i++) { @@ -XXX,XX +XXX,XX @@ static void nvme_exit(PCIDevice *pci_dev) if (n->cmb_size_mb) { g_free(n->cmbuf); } + + if (n->pmrdev) { + host_memory_backend_set_mapped(n->pmrdev, false); + } msix_uninit_exclusive_bar(pci_dev); } static Property nvme_props[] = { DEFINE_BLOCK_PROPERTIES(NvmeCtrl, conf), + DEFINE_PROP_LINK("pmrdev", NvmeCtrl, pmrdev, TYPE_MEMORY_BACKEND, + HostMemoryBackend *), DEFINE_PROP_STRING("serial", NvmeCtrl, serial), DEFINE_PROP_UINT32("cmb_size_mb", NvmeCtrl, cmb_size_mb, 0), DEFINE_PROP_UINT32("num_queues", NvmeCtrl, num_queues, 64), diff --git a/hw/block/Makefile.objs b/hw/block/Makefile.objs index XXXXXXX..XXXXXXX 100644 --- a/hw/block/Makefile.objs +++ b/hw/block/Makefile.objs @@ -XXX,XX +XXX,XX @@ common-obj-$(CONFIG_PFLASH_CFI02) += pflash_cfi02.o common-obj-$(CONFIG_XEN) += xen-block.o common-obj-$(CONFIG_ECC) += ecc.o common-obj-$(CONFIG_ONENAND) += onenand.o -common-obj-$(CONFIG_NVME_PCI) += nvme.o common-obj-$(CONFIG_SWIM) += swim.o common-obj-$(CONFIG_SH4) += tc58128.o obj-$(CONFIG_VIRTIO_BLK) += virtio-blk.o obj-$(CONFIG_VHOST_USER_BLK) += vhost-user-blk.o +obj-$(CONFIG_NVME_PCI) += nvme.o obj-y += dataplane/ diff --git a/hw/block/trace-events b/hw/block/trace-events index XXXXXXX..XXXXXXX 100644 --- a/hw/block/trace-events +++ b/hw/block/trace-events @@ -XXX,XX +XXX,XX @@ nvme_ub_mmiowr_ssreset_w1c_unsupported(void) "attempted to W1C CSTS.NSSRO but CA nvme_ub_mmiowr_ssreset_unsupported(void) "attempted NVM subsystem reset but CAP.NSSRS is zero (not supported)" nvme_ub_mmiowr_cmbloc_reserved(void) "invalid write to reserved CMBLOC when CMBSZ is zero, ignored" nvme_ub_mmiowr_cmbsz_readonly(void) "invalid write to read only CMBSZ, ignored" +nvme_ub_mmiowr_pmrcap_readonly(void) "invalid write to read only PMRCAP, ignored" +nvme_ub_mmiowr_pmrsts_readonly(void) "invalid write to read only PMRSTS, ignored" +nvme_ub_mmiowr_pmrebs_readonly(void) "invalid write to read only PMREBS, ignored" +nvme_ub_mmiowr_pmrswtp_readonly(void) "invalid write to read only PMRSWTP, ignored" nvme_ub_mmiowr_invalid(uint64_t offset, uint64_t data) "invalid MMIO write, offset=0x%"PRIx64", data=0x%"PRIx64"" nvme_ub_mmiord_misaligned32(uint64_t offset) "MMIO read not 32-bit aligned, offset=0x%"PRIx64"" nvme_ub_mmiord_toosmall(uint64_t offset) "MMIO read smaller than 32-bits, offset=0x%"PRIx64"" -- 2.25.3 The QMP handler qmp_object_add() and the implementation of --object in qemu-storage-daemon can share most of the code. Currently, qemu-storage-daemon calls qmp_object_add(), but this is not correct because different visitors need to be used. As a first step towards a fix, make qmp_object_add() a wrapper around a new function user_creatable_add_dict() that can get an additional parameter. The handling of "props" is only required for compatibility and not required for the qemu-storage-daemon command line, so it stays in qmp_object_add(). Signed-off-by: Kevin Wolf <kwolf@redhat.com> --- include/qom/object_interfaces.h | 12 ++++++++++++ qom/object_interfaces.c | 27 +++++++++++++++++++++++++++ qom/qom-qmp-cmds.c | 24 +----------------------- 3 files changed, 40 insertions(+), 23 deletions(-) diff --git a/include/qom/object_interfaces.h b/include/qom/object_interfaces.h index XXXXXXX..XXXXXXX 100644 --- a/include/qom/object_interfaces.h +++ b/include/qom/object_interfaces.h @@ -XXX,XX +XXX,XX @@ Object *user_creatable_add_type(const char *type, const char *id, const QDict *qdict, Visitor *v, Error **errp); +/** + * user_creatable_add_dict: + * @qdict: the object definition + * @errp: if an error occurs, a pointer to an area to store the error + * + * Create an instance of the user creatable object that is defined by + * @qdict. The object type is taken from the QDict key 'qom-type', its + * ID from the key 'id'. The remaining entries in @qdict are used to + * initialize the object properties. + */ +void user_creatable_add_dict(QDict *qdict, Error **errp); + /** * user_creatable_add_opts: * @opts: the object definition diff --git a/qom/object_interfaces.c b/qom/object_interfaces.c index XXXXXXX..XXXXXXX 100644 --- a/qom/object_interfaces.c +++ b/qom/object_interfaces.c @@ -XXX,XX +XXX,XX @@ #include "qapi/qmp/qerror.h" #include "qapi/qmp/qjson.h" #include "qapi/qmp/qstring.h" +#include "qapi/qobject-input-visitor.h" #include "qom/object_interfaces.h" #include "qemu/help_option.h" #include "qemu/module.h" @@ -XXX,XX +XXX,XX @@ out: return obj; } +void user_creatable_add_dict(QDict *qdict, Error **errp) +{ + Visitor *v; + Object *obj; + g_autofree char *type = NULL; + g_autofree char *id = NULL; + + type = g_strdup(qdict_get_try_str(qdict, "qom-type")); + if (!type) { + error_setg(errp, QERR_MISSING_PARAMETER, "qom-type"); + return; + } + qdict_del(qdict, "qom-type"); + + id = g_strdup(qdict_get_try_str(qdict, "id")); + if (!id) { + error_setg(errp, QERR_MISSING_PARAMETER, "id"); + return; + } + qdict_del(qdict, "id"); + + v = qobject_input_visitor_new(QOBJECT(qdict)); + obj = user_creatable_add_type(type, id, qdict, v, errp); + visit_free(v); + object_unref(obj); +} Object *user_creatable_add_opts(QemuOpts *opts, Error **errp) { diff --git a/qom/qom-qmp-cmds.c b/qom/qom-qmp-cmds.c index XXXXXXX..XXXXXXX 100644 --- a/qom/qom-qmp-cmds.c +++ b/qom/qom-qmp-cmds.c @@ -XXX,XX +XXX,XX @@ #include "qapi/qapi-commands-qom.h" #include "qapi/qmp/qdict.h" #include "qapi/qmp/qerror.h" -#include "qapi/qobject-input-visitor.h" #include "qemu/cutils.h" #include "qom/object_interfaces.h" #include "qom/qom-qobject.h" @@ -XXX,XX +XXX,XX @@ void qmp_object_add(QDict *qdict, QObject **ret_data, Error **errp) { QObject *props; QDict *pdict; - Visitor *v; - Object *obj; - g_autofree char *type = NULL; - g_autofree char *id = NULL; - - type = g_strdup(qdict_get_try_str(qdict, "qom-type")); - if (!type) { - error_setg(errp, QERR_MISSING_PARAMETER, "qom-type"); - return; - } - qdict_del(qdict, "qom-type"); - - id = g_strdup(qdict_get_try_str(qdict, "id")); - if (!id) { - error_setg(errp, QERR_MISSING_PARAMETER, "id"); - return; - } - qdict_del(qdict, "id"); props = qdict_get(qdict, "props"); if (props) { @@ -XXX,XX +XXX,XX @@ void qmp_object_add(QDict *qdict, QObject **ret_data, Error **errp) qobject_unref(pdict); } - v = qobject_input_visitor_new(QOBJECT(qdict)); - obj = user_creatable_add_type(type, id, qdict, v, errp); - visit_free(v); - object_unref(obj); + user_creatable_add_dict(qdict, errp); } void qmp_object_del(const char *id, Error **errp) -- 2.25.3 After processing the option string with the keyval parser, we get a QDict that contains only strings. This QDict must be fed to a keyval visitor which converts the strings into the right data types. qmp_object_add(), however, uses the normal QObject input visitor, which expects a QDict where all properties already have the QType that matches the data type required by the QOM object type. Change the --object implementation in qemu-storage-daemon so that it doesn't call qmp_object_add(), but calls user_creatable_add_dict() directly instead and pass it a new keyval boolean that decides which visitor must be used. Reported-by: Coiby Xu <coiby.xu@gmail.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com> --- include/qom/object_interfaces.h | 6 +++++- qemu-storage-daemon.c | 4 +--- qom/object_interfaces.c | 8 ++++++-- qom/qom-qmp-cmds.c | 2 +- 4 files changed, 13 insertions(+), 7 deletions(-) diff --git a/include/qom/object_interfaces.h b/include/qom/object_interfaces.h index XXXXXXX..XXXXXXX 100644 --- a/include/qom/object_interfaces.h +++ b/include/qom/object_interfaces.h @@ -XXX,XX +XXX,XX @@ Object *user_creatable_add_type(const char *type, const char *id, /** * user_creatable_add_dict: * @qdict: the object definition + * @keyval: if true, use a keyval visitor for processing @qdict (i.e. + * assume that all @qdict values are strings); otherwise, use + * the normal QObject visitor (i.e. assume all @qdict values + * have the QType expected by the QOM object type) * @errp: if an error occurs, a pointer to an area to store the error * * Create an instance of the user creatable object that is defined by @@ -XXX,XX +XXX,XX @@ Object *user_creatable_add_type(const char *type, const char *id, * ID from the key 'id'. The remaining entries in @qdict are used to * initialize the object properties. */ -void user_creatable_add_dict(QDict *qdict, Error **errp); +void user_creatable_add_dict(QDict *qdict, bool keyval, Error **errp); /** * user_creatable_add_opts: diff --git a/qemu-storage-daemon.c b/qemu-storage-daemon.c index XXXXXXX..XXXXXXX 100644 --- a/qemu-storage-daemon.c +++ b/qemu-storage-daemon.c @@ -XXX,XX +XXX,XX @@ static void process_options(int argc, char *argv[]) QemuOpts *opts; const char *type; QDict *args; - QObject *ret_data = NULL; /* FIXME The keyval parser rejects 'help' arguments, so we must * unconditionall try QemuOpts first. */ @@ -XXX,XX +XXX,XX @@ static void process_options(int argc, char *argv[]) qemu_opts_del(opts); args = keyval_parse(optarg, "qom-type", &error_fatal); - qmp_object_add(args, &ret_data, &error_fatal); + user_creatable_add_dict(args, true, &error_fatal); qobject_unref(args); - qobject_unref(ret_data); break; } default: diff --git a/qom/object_interfaces.c b/qom/object_interfaces.c index XXXXXXX..XXXXXXX 100644 --- a/qom/object_interfaces.c +++ b/qom/object_interfaces.c @@ -XXX,XX +XXX,XX @@ out: return obj; } -void user_creatable_add_dict(QDict *qdict, Error **errp) +void user_creatable_add_dict(QDict *qdict, bool keyval, Error **errp) { Visitor *v; Object *obj; @@ -XXX,XX +XXX,XX @@ void user_creatable_add_dict(QDict *qdict, Error **errp) } qdict_del(qdict, "id"); - v = qobject_input_visitor_new(QOBJECT(qdict)); + if (keyval) { + v = qobject_input_visitor_new_keyval(QOBJECT(qdict)); + } else { + v = qobject_input_visitor_new(QOBJECT(qdict)); + } obj = user_creatable_add_type(type, id, qdict, v, errp); visit_free(v); object_unref(obj); diff --git a/qom/qom-qmp-cmds.c b/qom/qom-qmp-cmds.c index XXXXXXX..XXXXXXX 100644 --- a/qom/qom-qmp-cmds.c +++ b/qom/qom-qmp-cmds.c @@ -XXX,XX +XXX,XX @@ void qmp_object_add(QDict *qdict, QObject **ret_data, Error **errp) qobject_unref(pdict); } - user_creatable_add_dict(qdict, errp); + user_creatable_add_dict(qdict, false, errp); } void qmp_object_del(const char *id, Error **errp) -- 2.25.3