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This patch series add a new extension - zoned format - to the qcow2 driver thereby allowing full zoned storage emulation on the qcow2 img file. Users can attach such a qcow2 file to the guest as a zoned device. To create a qcow2 file with zoned format, use command like this: $ qemu-img create -f qcow2 test.qcow2 -o size=768M -o zone_size=64M -o zone_capacity=64M -o nr_conv_zones=0 -o max_append_sectors=512 -o max_open_zones=0 -o max_active_zones=0 -o zone_model=1 Then add it to the QEMU command line: -blockdev node-name=drive1,driver=qcow2,file.driver=file,file.filename=../qemu/test.qcow2 \ -device virtio-blk-pci,drive=drive1 \ v2->v3: - drop zoned_profile option [Klaus] - reformat doc comments of qcow2 [Markus] - add input validation and checks for zoned information [Stefan] - code style: format, comments, documentation, naming [Stefan] - add tracing function for wp tracking [Stefan] - reconstruct io path in check_zone_resources [Stefan] v1->v2: - add more tests to qemu-io zoned commands - make zone append change state to full when wp reaches end - add documentation to qcow2 zoned extension header - address review comments (Stefan): * fix zoned_mata allocation size * use bitwise or than addition * fix wp index overflow and locking * cleanups: comments, naming Sam Li (4): docs/qcow2: add the zoned format feature qcow2: add configurations for zoned format extension qcow2: add zoned emulation capability iotests: test the zoned format feature for qcow2 file block/qcow2.c | 831 ++++++++++++++++++++++- block/qcow2.h | 22 + block/trace-events | 1 + docs/interop/qcow2.txt | 42 ++ docs/system/qemu-block-drivers.rst.inc | 39 ++ include/block/block_int-common.h | 13 + qapi/block-core.json | 30 +- tests/qemu-iotests/tests/zoned-qcow2 | 135 ++++ tests/qemu-iotests/tests/zoned-qcow2.out | 140 ++++ 9 files changed, 1250 insertions(+), 3 deletions(-) create mode 100755 tests/qemu-iotests/tests/zoned-qcow2 create mode 100644 tests/qemu-iotests/tests/zoned-qcow2.out -- 2.40.1
Add the specs for the zoned format feature of the qcow2 driver. The qcow2 file can be taken as zoned device and passed through by virtio-blk device or NVMe ZNS device to the guest given zoned information. Signed-off-by: Sam Li <faithilikerun@gmail.com> --- docs/system/qemu-block-drivers.rst.inc | 39 ++++++++++++++++++++++++++ 1 file changed, 39 insertions(+) diff --git a/docs/system/qemu-block-drivers.rst.inc b/docs/system/qemu-block-drivers.rst.inc index XXXXXXX..XXXXXXX 100644 --- a/docs/system/qemu-block-drivers.rst.inc +++ b/docs/system/qemu-block-drivers.rst.inc @@ -XXX,XX +XXX,XX @@ This section describes each format and the options that are supported for it. filename`` to check if the NOCOW flag is set or not (Capital 'C' is NOCOW flag). + .. option:: zoned + The zoned interface of zoned storage divices can different forms which + is referred to as models. This option uses number to represent, 1 for + host-managed and 0 for non-zoned. + + .. option:: zone_size + + The size of a zone of the zoned device in bytes. The device is divided + into zones of this size with the exception of the last zone, which may + be smaller. + + .. option:: zone_capacity + + The initial capacity value for all zones. The capacity must be less than + or equal to zone size. If the last zone is smaller, then its capacity is + capped. The device follows the ZBC protocol tends to have the same size + as its zone. + + The zone capacity is per zone and may be different between zones in real + devices. For simplicity, limits QCow2 emulation to the same zone capacity + for all zones. + + .. option:: zone_nr_conv + + The number of conventional zones of the zoned device. + + .. option:: max_open_zones + + The maximal allowed open zones. + + .. option:: max_active_zones + + The limit of the zones with implicit open, explicit open or closed state. + + .. option:: max_append_sectors + + The maximal sectors in 512B blocks that is allowed to append to zones + while writing. + .. program:: image-formats .. option:: qed -- 2.40.1
To configure the zoned format feature on the qcow2 driver, it requires following arguments: the device size, zoned profile, zone model, zone size, zone capacity, number of conventional zones, limits on zone resources (max append sectors, max open zones, and max_active_zones). To create a qcow2 file with zoned format, use command like this: $ qemu-img create -f qcow2 test.qcow2 -o size=768M -o zone_size=64M -o zone_capacity=64M -o nr_conv_zones=0 -o max_append_sectors=512 -o max_open_zones=0 -o max_active_zones=0 -o zone_model=1 Signed-off-by: Sam Li <faithilikerun@gmail.com> --- block/qcow2.c | 176 ++++++++++++++++++++++++++++++- block/qcow2.h | 20 ++++ docs/interop/qcow2.txt | 36 +++++++ include/block/block_int-common.h | 13 +++ qapi/block-core.json | 30 +++++- 5 files changed, 273 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 @@ typedef struct { #define QCOW2_EXT_MAGIC_CRYPTO_HEADER 0x0537be77 #define QCOW2_EXT_MAGIC_BITMAPS 0x23852875 #define QCOW2_EXT_MAGIC_DATA_FILE 0x44415441 +#define QCOW2_EXT_MAGIC_ZONED_FORMAT 0x7a6264 static int coroutine_fn qcow2_co_preadv_compressed(BlockDriverState *bs, @@ -XXX,XX +XXX,XX @@ qcow2_read_extensions(BlockDriverState *bs, uint64_t start_offset, uint64_t offset; int ret; Qcow2BitmapHeaderExt bitmaps_ext; + Qcow2ZonedHeaderExtension zoned_ext; if (need_update_header != NULL) { *need_update_header = false; @@ -XXX,XX +XXX,XX @@ qcow2_read_extensions(BlockDriverState *bs, uint64_t start_offset, break; } + case QCOW2_EXT_MAGIC_ZONED_FORMAT: + { + if (ext.len != sizeof(zoned_ext)) { + error_setg(errp, "zoned_ext: Invalid extension length"); + return -EINVAL; + } + ret = bdrv_pread(bs->file, offset, ext.len, &zoned_ext, 0); + if (ret < 0) { + error_setg_errno(errp, -ret, "zoned_ext: " + "Could not read ext header"); + return ret; + } + + zoned_ext.zone_size = be32_to_cpu(zoned_ext.zone_size); + zoned_ext.zone_capacity = be32_to_cpu(zoned_ext.zone_capacity); + zoned_ext.nr_conv_zones = be32_to_cpu(zoned_ext.nr_conv_zones); + zoned_ext.nr_zones = be32_to_cpu(zoned_ext.nr_zones); + zoned_ext.max_open_zones = be32_to_cpu(zoned_ext.max_open_zones); + zoned_ext.max_active_zones = + be32_to_cpu(zoned_ext.max_active_zones); + zoned_ext.max_append_sectors = + be32_to_cpu(zoned_ext.max_append_sectors); + s->zoned_header = zoned_ext; + + /* refuse to open broken images */ + if (zoned_ext.zone_size == 0) { + error_setg(errp, "Zoned extension header zone_size field " + "can not be 0"); + return -EINVAL; + } + if (zoned_ext.zone_capacity > zoned_ext.zone_size) { + error_setg(errp, "Zoned extension header zone_capacity field " + "can not be larger that zone_size field"); + return -EINVAL; + } + if (zoned_ext.nr_zones != DIV_ROUND_UP( + bs->total_sectors * BDRV_SECTOR_SIZE, zoned_ext.zone_size)) { + error_setg(errp, "Zoned extension header nr_zones field " + "gets wrong"); + return -EINVAL; + } + +#ifdef DEBUG_EXT + printf("Qcow2: Got zoned format extension: " + "offset=%" PRIu32 "\n", offset); +#endif + break; + } + default: /* unknown magic - save it in case we need to rewrite the header */ /* If you add a new feature, make sure to also update the fast @@ -XXX,XX +XXX,XX @@ static void qcow2_refresh_limits(BlockDriverState *bs, Error **errp) } bs->bl.pwrite_zeroes_alignment = s->subcluster_size; bs->bl.pdiscard_alignment = s->cluster_size; + bs->bl.zoned = s->zoned_header.zoned; + bs->bl.nr_zones = s->zoned_header.nr_zones; + bs->wps = s->wps; + bs->bl.max_append_sectors = s->zoned_header.max_append_sectors; + bs->bl.max_active_zones = s->zoned_header.max_active_zones; + bs->bl.max_open_zones = s->zoned_header.max_open_zones; + bs->bl.zone_size = s->zoned_header.zone_size; + bs->bl.write_granularity = BDRV_SECTOR_SIZE; } static int qcow2_reopen_prepare(BDRVReopenState *state, @@ -XXX,XX +XXX,XX @@ int qcow2_update_header(BlockDriverState *bs) buflen -= ret; } + /* Zoned devices header extension */ + if (s->zoned_header.zoned == BLK_Z_HM) { + Qcow2ZonedHeaderExtension zoned_header = { + .zoned = s->zoned_header.zoned, + .zone_size = cpu_to_be32(s->zoned_header.zone_size), + .zone_capacity = cpu_to_be32(s->zoned_header.zone_capacity), + .nr_conv_zones = cpu_to_be32(s->zoned_header.nr_conv_zones), + .nr_zones = cpu_to_be32(s->zoned_header.nr_zones), + .max_open_zones = cpu_to_be32(s->zoned_header.max_open_zones), + .max_active_zones = + cpu_to_be32(s->zoned_header.max_active_zones), + .max_append_sectors = + cpu_to_be32(s->zoned_header.max_append_sectors) + }; + ret = header_ext_add(buf, QCOW2_EXT_MAGIC_ZONED_FORMAT, + &zoned_header, sizeof(zoned_header), + buflen); + if (ret < 0) { + goto fail; + } + buf += ret; + buflen -= ret; + } + /* Keep unknown header extensions */ QLIST_FOREACH(uext, &s->unknown_header_ext, next) { ret = header_ext_add(buf, uext->magic, uext->data, uext->len, buflen); @@ -XXX,XX +XXX,XX @@ qcow2_co_create(BlockdevCreateOptions *create_options, Error **errp) } /* Set the external data file if necessary */ + BDRVQcow2State *s = blk_bs(blk)->opaque; if (data_bs) { - BDRVQcow2State *s = blk_bs(blk)->opaque; s->image_data_file = g_strdup(data_bs->filename); } + if (qcow2_opts->has_zone_model && qcow2_opts->zone_model == BLK_Z_HM) { + if (qcow2_opts->has_zone_size && qcow2_opts->zone_size == 0) { + s->zoned_header.zoned = BLK_Z_NONE; + error_setg(errp, "Zoned devices can not allow a larger-than-zero " + "zone_size"); + goto out; + } + s->zoned_header.zoned = qcow2_opts->zone_model; + s->zoned_header.zone_size = qcow2_opts->zone_size; + s->zoned_header.nr_zones = DIV_ROUND_UP(qcow2_opts->size, + qcow2_opts->zone_size); + + if (qcow2_opts->has_zone_capacity) { + if (qcow2_opts->zone_capacity > qcow2_opts->zone_size) { + s->zoned_header.zoned = BLK_Z_NONE; + error_setg(errp, "zone capacity %" PRIu64 "B exceeds zone size " + "%" PRIu64"B", qcow2_opts->zone_capacity, + qcow2_opts->zone_size); + goto out; + } + s->zoned_header.zone_capacity = qcow2_opts->zone_capacity; + } else { + s->zoned_header.zone_capacity = qcow2_opts->zone_size; + } + + if (qcow2_opts->has_nr_conv_zones) { + s->zoned_header.nr_conv_zones = qcow2_opts->nr_conv_zones; + } + + if (qcow2_opts->has_max_active_zones) { + if (qcow2_opts->max_open_zones > qcow2_opts->max_active_zones) { + s->zoned_header.zoned = BLK_Z_NONE; + error_setg(errp, "max_open_zones %" PRIu32 " exceeds " + "max_active_zones %" PRIu32"", + qcow2_opts->max_open_zones, + qcow2_opts->max_active_zones); + goto out; + } + if (qcow2_opts->has_max_open_zones) { + s->zoned_header.max_open_zones = qcow2_opts->max_active_zones; + } else { + s->zoned_header.max_open_zones = qcow2_opts->max_active_zones; + } + } + s->zoned_header.max_append_sectors = qcow2_opts->max_append_sectors; + } else { + s->zoned_header.zoned = BLK_Z_NONE; + } + /* Create a full header (including things like feature table) */ ret = qcow2_update_header(blk_bs(blk)); bdrv_graph_co_rdunlock(); @@ -XXX,XX +XXX,XX @@ qcow2_co_create_opts(BlockDriver *drv, const char *filename, QemuOpts *opts, { BLOCK_OPT_COMPAT_LEVEL, "version" }, { BLOCK_OPT_DATA_FILE_RAW, "data-file-raw" }, { BLOCK_OPT_COMPRESSION_TYPE, "compression-type" }, + { BLOCK_OPT_Z_MODEL, "zone-model"}, + { BLOCK_OPT_Z_NR_COV, "nr-conv-zones"}, + { BLOCK_OPT_Z_MOZ, "max-open-zones"}, + { BLOCK_OPT_Z_MAZ, "max-active-zones"}, + { BLOCK_OPT_Z_MAS, "max-append-sectors"}, + { BLOCK_OPT_Z_SIZE, "zone-size"}, + { BLOCK_OPT_Z_CAP, "zone-capacity"}, { NULL, NULL }, }; @@ -XXX,XX +XXX,XX @@ static QemuOptsList qcow2_create_opts = { .help = "Compression method used for image cluster " \ "compression", \ .def_value_str = "zlib" \ + }, \ + { \ + .name = BLOCK_OPT_Z_MODEL, \ + .type = QEMU_OPT_NUMBER, \ + .help = "zone model", \ + }, \ + { \ + .name = BLOCK_OPT_Z_SIZE, \ + .type = QEMU_OPT_SIZE, \ + .help = "zone size", \ + }, \ + { \ + .name = BLOCK_OPT_Z_CAP, \ + .type = QEMU_OPT_SIZE, \ + .help = "zone capacity", \ + }, \ + { \ + .name = BLOCK_OPT_Z_NR_COV, \ + .type = QEMU_OPT_NUMBER, \ + .help = "numbers of conventional zones", \ + }, \ + { \ + .name = BLOCK_OPT_Z_MAS, \ + .type = QEMU_OPT_NUMBER, \ + .help = "max append sectors", \ + }, \ + { \ + .name = BLOCK_OPT_Z_MAZ, \ + .type = QEMU_OPT_NUMBER, \ + .help = "max active zones", \ + }, \ + { \ + .name = BLOCK_OPT_Z_MOZ, \ + .type = QEMU_OPT_NUMBER, \ + .help = "max open zones", \ }, QCOW_COMMON_OPTIONS, { /* end of list */ } 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 Qcow2CryptoHeaderExtension { uint64_t length; } QEMU_PACKED Qcow2CryptoHeaderExtension; +typedef struct Qcow2ZonedHeaderExtension { + /* Zoned device attributes */ + uint8_t zoned; + uint8_t reserved[3]; + uint32_t zone_size; + uint32_t zone_capacity; + uint32_t nr_conv_zones; + uint32_t nr_zones; + uint32_t max_active_zones; + uint32_t max_open_zones; + uint32_t max_append_sectors; +} QEMU_PACKED Qcow2ZonedHeaderExtension; + typedef struct Qcow2UnknownHeaderExtension { uint32_t magic; uint32_t len; @@ -XXX,XX +XXX,XX @@ typedef struct BDRVQcow2State { * is to convert the image with the desired compression type set. */ Qcow2CompressionType compression_type; + + /* States of zoned device */ + Qcow2ZonedHeaderExtension zoned_header; + uint32_t nr_zones_exp_open; + uint32_t nr_zones_imp_open; + uint32_t nr_zones_closed; + BlockZoneWps *wps; } BDRVQcow2State; typedef struct Qcow2COWRegion { 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 fields of the bitmaps extension are: Offset into the image file at which the bitmap directory starts. Must be aligned to a cluster boundary. +== Zoned extension == + +The zoned extension is an optional header extension. It contains fields for +emulating the zoned stroage model (https://zonedstorage.io/). + +The fields of the zoned extension are: + Byte 0: zoned + Zoned model, 1 for host-managed and 0 for non-zoned devices. + + 1 - 3: Reserved, must be zero. + + 4 - 7: zone_size + Total number of logical blocks within the zones in bytes. + + 8 - 11: zone_capacity + The number of writable logical blocks within the zones in + bytes. A zone capacity is always smaller or equal to the + zone size. + + 12 - 15: nr_conv_zones + The number of conventional zones. + + 16 - 19: nr_zones + The number of zones. + + 20 - 23: max_active_zones + The limit of the zones that have the implicit open, + explicit open or closed state. + + 24 - 27: max_open_zones + The maximal allowed open zones. + + 28 - 35: max_append_sectors + The maximal data size in sectors of a zone + append request that can be issued to the device. + == Full disk encryption header pointer == The full disk encryption header must be present if, and only if, the diff --git a/include/block/block_int-common.h b/include/block/block_int-common.h index XXXXXXX..XXXXXXX 100644 --- a/include/block/block_int-common.h +++ b/include/block/block_int-common.h @@ -XXX,XX +XXX,XX @@ #define BLOCK_OPT_DATA_FILE_RAW "data_file_raw" #define BLOCK_OPT_COMPRESSION_TYPE "compression_type" #define BLOCK_OPT_EXTL2 "extended_l2" +#define BLOCK_OPT_Z_MODEL "zone_model" +#define BLOCK_OPT_Z_SIZE "zone_size" +#define BLOCK_OPT_Z_CAP "zone_capacity" +#define BLOCK_OPT_Z_NR_COV "nr_conv_zones" +#define BLOCK_OPT_Z_MAS "max_append_sectors" +#define BLOCK_OPT_Z_MAZ "max_active_zones" +#define BLOCK_OPT_Z_MOZ "max_open_zones" #define BLOCK_PROBE_BUF_SIZE 512 @@ -XXX,XX +XXX,XX @@ typedef struct BlockLimits { /* zone size expressed in bytes */ uint32_t zone_size; + /* + * the number of usable logical blocks within the zone, expressed + * in bytes. A zone capacity is smaller or equal to the zone size. + */ + uint32_t zone_capacity; + /* total number of zones */ uint32_t nr_zones; 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 @@ # @compression-type: The image cluster compression method # (default: zlib, since 5.1) # +# @zone-model: Zoned device model, 1 for host-managed and 0 for +# non-zoned devices (default: 0, since 8.0) +# +# @zone-size: Total number of logical blocks within zones in bytes +# (since 8.0) +# +# @zone-capacity: The number of usable logical blocks within zones +# in bytes. A zone capacity is always smaller or equal to the +# zone size. (since 8.0) +# +# @nr-conv-zones: The number of conventional zones of the zoned device +# (since 8.0) +# +# @max-open-zones: The maximal allowed open zones (since 8.0) +# +# @max-active-zones: The limit of the zones that have the implicit +# open, explicit open or closed state (since 8.0) +# +# @max-append-sectors: The maximal data size in sectors of a zone +# append request that can be issued to the device. (since 8.0) +# # Since: 2.12 ## { 'struct': 'BlockdevCreateOptionsQcow2', @@ -XXX,XX +XXX,XX @@ '*preallocation': 'PreallocMode', '*lazy-refcounts': 'bool', '*refcount-bits': 'int', - '*compression-type':'Qcow2CompressionType' } } + '*compression-type':'Qcow2CompressionType', + '*zone-model': 'uint8', + '*zone-size': 'size', + '*zone-capacity': 'size', + '*nr-conv-zones': 'uint32', + '*max-open-zones': 'uint32', + '*max-active-zones': 'uint32', + '*max-append-sectors': 'uint32' } } ## # @BlockdevCreateOptionsQed: -- 2.40.1
By adding zone operations and zoned metadata, the zoned emulation capability enables full emulation support of zoned device using a qcow2 file. The zoned device metadata includes zone type, zoned device state and write pointer of each zone, which is stored to an array of unsigned integers. Each zone of a zoned device makes state transitions following the zone state machine. The zone state machine mainly describes five states, IMPLICIT OPEN, EXPLICIT OPEN, FULL, EMPTY and CLOSED. READ ONLY and OFFLINE states will generally be affected by device internal events. The operations on zones cause corresponding state changing. Zoned devices have a limit on zone resources, which puts constraints on write operations into zones. Signed-off-by: Sam Li <faithilikerun@gmail.com> --- block/qcow2.c | 657 ++++++++++++++++++++++++++++++++++++++++- block/qcow2.h | 2 + block/trace-events | 1 + docs/interop/qcow2.txt | 6 + 4 files changed, 664 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 @@ qcow2_extract_crypto_opts(QemuOpts *opts, const char *fmt, Error **errp) return cryptoopts_qdict; } +#define QCOW2_ZT_IS_CONV(wp) (wp & 1ULL << 59) + +static inline int qcow2_get_wp(uint64_t wp) +{ + /* clear state and type information */ + return ((wp << 5) >> 5); +} + +static inline int qcow2_get_zs(uint64_t wp) +{ + return (wp >> 60); +} + +static inline void qcow2_set_zs(uint64_t *wp, BlockZoneState zs) +{ + uint64_t addr = qcow2_get_wp(*wp); + addr |= ((uint64_t)zs << 60); + *wp = addr; +} + +/* + * Perform a state assignment and a flush operation that writes the new wp + * value to the dedicated location of the disk file. + */ +static int qcow2_write_wp_at(BlockDriverState *bs, uint64_t *wp, + uint32_t index, BlockZoneState zs) { + BDRVQcow2State *s = bs->opaque; + uint64_t wpv = *wp; + int ret; + + qcow2_set_zs(wp, zs); + ret = bdrv_pwrite(bs->file, s->zoned_header.zonedmeta_offset + + sizeof(uint64_t) * index, sizeof(uint64_t), wp, 0); + + if (ret < 0) { + goto exit; + } + trace_qcow2_wp_tracking(index, qcow2_get_wp(*wp) >> BDRV_SECTOR_BITS); + return ret; + +exit: + *wp = wpv; + error_report("Failed to write metadata with file"); + return ret; +} + +static bool qcow2_check_active_zones(BlockDriverState *bs) +{ + BDRVQcow2State *s = bs->opaque; + + if (!s->zoned_header.max_active_zones) { + return true; + } + + if (s->nr_zones_exp_open + s->nr_zones_imp_open + s->nr_zones_closed + < s->zoned_header.max_active_zones) { + return true; + } + + return false; +} + +static int qcow2_check_open_zones(BlockDriverState *bs) +{ + BDRVQcow2State *s = bs->opaque; + int ret; + + if (!s->zoned_header.max_open_zones) { + return 0; + } + + if (s->nr_zones_exp_open + s->nr_zones_imp_open + < s->zoned_header.max_open_zones) { + return 0; + } + + if(s->nr_zones_imp_open && qcow2_check_active_zones(bs)) { + /* TODO: it takes O(n) time complexity (n = nr_zones). + * Optimizations required. */ + /* close one implicitly open zones to make it available */ + for (int i = s->zoned_header.nr_conv_zones; + i < bs->bl.nr_zones; ++i) { + uint64_t *wp = &bs->wps->wp[i]; + if (qcow2_get_zs(*wp) == BLK_ZS_IOPEN) { + ret = qcow2_write_wp_at(bs, wp, i, BLK_ZS_CLOSED); + if (ret < 0) { + return ret; + } + bs->wps->wp[i] = *wp; + s->nr_zones_imp_open--; + s->nr_zones_closed++; + break; + } + } + return 0; + } + + return -EINVAL; +} + +/* + * The zoned device has limited zone resources of open, closed, active + * zones. + */ +static int qcow2_check_zone_resources(BlockDriverState *bs, + BlockZoneState zs) +{ + int ret = 0; + + switch (zs) { + case BLK_ZS_EMPTY: + if (!qcow2_check_active_zones(bs)) { + error_report("No enough active zones"); + return -EINVAL; + } + return ret; + case BLK_ZS_CLOSED: + ret = qcow2_check_open_zones(bs); + if (ret < 0) { + error_report("No enough open zones"); + return ret; + } + return ret; + default: + return -EINVAL; + } + +} + +static inline int qcow2_refresh_zonedmeta(BlockDriverState *bs) +{ + int ret; + BDRVQcow2State *s = bs->opaque; + uint64_t wps_size = s->zoned_header.zonedmeta_size; + g_autofree uint64_t *temp = NULL; + temp = g_new(uint64_t, wps_size); + ret = bdrv_pread(bs->file, s->zoned_header.zonedmeta_offset, + wps_size, temp, 0); + if (ret < 0) { + error_report("Can not read metadata"); + return ret; + } + + memcpy(s->wps->wp, temp, wps_size); + return 0; +} + /* * read qcow2 extension and fill bs * start reading from start_offset @@ -XXX,XX +XXX,XX @@ qcow2_read_extensions(BlockDriverState *bs, uint64_t start_offset, be32_to_cpu(zoned_ext.max_active_zones); zoned_ext.max_append_sectors = be32_to_cpu(zoned_ext.max_append_sectors); + zoned_ext.zonedmeta_offset = + be64_to_cpu(zoned_ext.zonedmeta_offset); + zoned_ext.zonedmeta_size = be64_to_cpu(zoned_ext.zonedmeta_size); s->zoned_header = zoned_ext; + s->wps = g_malloc(sizeof(BlockZoneWps) + + s->zoned_header.zonedmeta_size); + ret = qcow2_refresh_zonedmeta(bs); + if (ret < 0) { + error_setg_errno(errp, -ret, "zonedmeta: " + "Could not update zoned meta"); + return ret; + } + qemu_co_mutex_init(&s->wps->colock); /* refuse to open broken images */ if (zoned_ext.zone_size == 0) { @@ -XXX,XX +XXX,XX @@ qcow2_co_pwritev_part(BlockDriverState *bs, int64_t offset, int64_t bytes, uint64_t host_offset; QCowL2Meta *l2meta = NULL; AioTaskPool *aio = NULL; + int64_t start_offset, start_bytes; + BlockZoneState zs; + int64_t end; + uint64_t *wp; + int64_t zone_size = bs->bl.zone_size; + int index; trace_qcow2_writev_start_req(qemu_coroutine_self(), offset, bytes); + start_offset = offset; + start_bytes = bytes; + /* The offset should not less than the wp of that + * zone where offset starts. */ + if (zone_size) { + index = start_offset / zone_size; + wp = &bs->wps->wp[index]; + if (offset < qcow2_get_wp(*wp)) { + return -EINVAL; + } + } while (bytes != 0 && aio_task_pool_status(aio) == 0) { l2meta = NULL; @@ -XXX,XX +XXX,XX @@ qcow2_co_pwritev_part(BlockDriverState *bs, int64_t offset, int64_t bytes, qiov_offset += cur_bytes; trace_qcow2_writev_done_part(qemu_coroutine_self(), cur_bytes); } + + if (zone_size) { + index = start_offset / zone_size; + wp = &bs->wps->wp[index]; + uint64_t wpv = *wp; + if (!QCOW2_ZT_IS_CONV(wpv)) { + /* + * Implicitly open one closed zone to write if there are zone resources + * left. + */ + zs = qcow2_get_zs(wpv); + if (zs == BLK_ZS_CLOSED || zs == BLK_ZS_EMPTY) { + ret = qcow2_check_zone_resources(bs, zs); + if (ret < 0) { + goto fail_nometa; + } + + if (zs == BLK_ZS_CLOSED) { + s->nr_zones_closed--; + s->nr_zones_imp_open++; + } else { + s->nr_zones_imp_open++; + } + } + + /* align up (start_offset, zone_size), the start offset is not + * necessarily power of two. */ + end = ((start_offset + zone_size) / zone_size) * zone_size; + if (start_offset + start_bytes <= end) { + *wp = start_offset + start_bytes; + } else { + ret = -EINVAL; + goto fail_nometa; + } + + ret = qcow2_write_wp_at(bs, wp, index,BLK_ZS_IOPEN); + if (ret < 0) { + goto fail_nometa; + } + } + } ret = 0; qemu_co_mutex_lock(&s->lock); @@ -XXX,XX +XXX,XX @@ int qcow2_update_header(BlockDriverState *bs) .max_active_zones = cpu_to_be32(s->zoned_header.max_active_zones), .max_append_sectors = - cpu_to_be32(s->zoned_header.max_append_sectors) + cpu_to_be32(s->zoned_header.max_append_sectors), + .zonedmeta_offset = cpu_to_be64(s->zoned_header.zonedmeta_offset), + .zonedmeta_size = cpu_to_be64(s->zoned_header.zonedmeta_size) }; ret = header_ext_add(buf, QCOW2_EXT_MAGIC_ZONED_FORMAT, &zoned_header, sizeof(zoned_header), @@ -XXX,XX +XXX,XX @@ qcow2_co_create(BlockdevCreateOptions *create_options, Error **errp) int version; int refcount_order; uint64_t *refcount_table; - int ret; + uint64_t zoned_meta_size, zoned_clusterlen; + int ret, offset, i; uint8_t compression_type = QCOW2_COMPRESSION_TYPE_ZLIB; assert(create_options->driver == BLOCKDEV_DRIVER_QCOW2); @@ -XXX,XX +XXX,XX @@ qcow2_co_create(BlockdevCreateOptions *create_options, Error **errp) } } s->zoned_header.max_append_sectors = qcow2_opts->max_append_sectors; + + uint32_t nrz = s->zoned_header.nr_zones; + zoned_meta_size = sizeof(uint64_t) * nrz; + g_autofree uint64_t *meta = NULL; + meta = g_new0(uint64_t, nrz); + + for (i = 0; i < s->zoned_header.nr_conv_zones; ++i) { + meta[i] = i * s->zoned_header.zone_size; + meta[i] |= 1ULL << 59; + } + + for (; i < nrz; ++i) { + meta[i] = i * s->zoned_header.zone_size; + /* For sequential zones, the first four most significant bit + * indicates zone states. */ + meta[i] |= ((uint64_t)BLK_ZS_EMPTY << 60); + } + + offset = qcow2_alloc_clusters(blk_bs(blk), zoned_meta_size); + if (offset < 0) { + error_setg_errno(errp, -offset, "Could not allocate clusters " + "for zoned metadata size"); + goto out; + } + s->zoned_header.zonedmeta_offset = offset; + s->zoned_header.zonedmeta_size = zoned_meta_size; + + zoned_clusterlen = size_to_clusters(s, zoned_meta_size) + * s->cluster_size; + assert(qcow2_pre_write_overlap_check(bs, 0, offset, + zoned_clusterlen,false) == 0); + ret = bdrv_pwrite_zeroes(blk_bs(blk)->file, offset, + zoned_clusterlen, 0); + if (ret < 0) { + error_setg_errno(errp, -ret, "Could not zero fill zoned metadata"); + goto out; + } + ret = bdrv_pwrite(blk_bs(blk)->file, offset, zoned_meta_size, meta, 0); + if (ret < 0) { + error_setg_errno(errp, -ret, "Could not write zoned metadata " + "to disk"); + goto out; + } } else { s->zoned_header.zoned = BLK_Z_NONE; } @@ -XXX,XX +XXX,XX @@ static coroutine_fn int qcow2_co_pdiscard(BlockDriverState *bs, return ret; } +static int coroutine_fn +qcow2_co_zone_report(BlockDriverState *bs, int64_t offset, + unsigned int *nr_zones, BlockZoneDescriptor *zones) +{ + BDRVQcow2State *s = bs->opaque; + uint64_t zone_size = s->zoned_header.zone_size; + int64_t capacity = bs->total_sectors << BDRV_SECTOR_BITS; + int64_t size = bs->bl.nr_zones * zone_size; + unsigned int nrz = *nr_zones; + int i = 0; + int si; + + if (offset >= capacity) { + error_report("offset %" PRId64 " is equal to or greater than the" + "device capacity %" PRId64 "", offset, capacity); + return -EINVAL; + } + + if (nrz > bs->bl.nr_zones) { + error_report("nr_zones %" PRId32 " should not exceed the device zones" + "%" PRId32 "", nrz, bs->bl.nr_zones); + return -EINVAL; + } + + if (zone_size > 0) { + si = offset / zone_size; + qemu_co_mutex_lock(&bs->wps->colock); + for (; i < nrz; ++i) { + if (i + si >= bs->bl.nr_zones) { + break; + } + + zones[i].start = (si + i) * zone_size; + + /* The last zone can be smaller than the zone size */ + if ((si + i + 1) == bs->bl.nr_zones && size > capacity) { + uint32_t l = zone_size - (size - capacity); + zones[i].length = l; + zones[i].cap = l; + } else { + zones[i].length = zone_size; + zones[i].cap = zone_size; + } + + uint64_t wp = bs->wps->wp[si + i]; + if (QCOW2_ZT_IS_CONV(wp)) { + zones[i].type = BLK_ZT_CONV; + zones[i].state = BLK_ZS_NOT_WP; + /* Clear the zone type bit */ + wp &= ~(1ULL << 59); + } else { + zones[i].type = BLK_ZT_SWR; + zones[i].state = qcow2_get_zs(wp); + /* Clear the zone state bits */ + wp = qcow2_get_wp(wp); + } + zones[i].wp = wp; + } + qemu_co_mutex_unlock(&bs->wps->colock); + } + *nr_zones = i; + return 0; +} + +static int qcow2_open_zone(BlockDriverState *bs, uint32_t index) { + BDRVQcow2State *s = bs->opaque; + int ret; + + qemu_co_mutex_lock(&bs->wps->colock); + uint64_t *wp = &bs->wps->wp[index]; + BlockZoneState zs = qcow2_get_zs(*wp); + + switch(zs) { + case BLK_ZS_EMPTY: + ret = qcow2_check_zone_resources(bs, BLK_ZS_EMPTY); + if (ret < 0) { + goto unlock; + } + break; + case BLK_ZS_IOPEN: + s->nr_zones_imp_open--; + break; + case BLK_ZS_EOPEN: + return 0; + case BLK_ZS_CLOSED: + ret = qcow2_check_zone_resources(bs, BLK_ZS_CLOSED); + if (ret < 0) { + goto unlock; + } + s->nr_zones_closed--; + break; + case BLK_ZS_FULL: + break; + default: + ret = -EINVAL; + goto unlock; + } + ret = qcow2_write_wp_at(bs, wp, index, BLK_ZS_EOPEN); + if (!ret) { + s->nr_zones_exp_open++; + } + +unlock: + qemu_co_mutex_unlock(&bs->wps->colock); + return ret; +} + +static int qcow2_close_zone(BlockDriverState *bs, uint32_t index) { + BDRVQcow2State *s = bs->opaque; + int ret; + + qemu_co_mutex_lock(&bs->wps->colock); + uint64_t *wp = &bs->wps->wp[index]; + BlockZoneState zs = qcow2_get_zs(*wp); + + switch(zs) { + case BLK_ZS_EMPTY: + break; + case BLK_ZS_IOPEN: + s->nr_zones_imp_open--; + break; + case BLK_ZS_EOPEN: + s->nr_zones_exp_open--; + break; + case BLK_ZS_CLOSED: + ret = qcow2_check_zone_resources(bs, BLK_ZS_CLOSED); + if (ret < 0) { + goto unlock; + } + s->nr_zones_closed--; + break; + case BLK_ZS_FULL: + break; + default: + ret = -EINVAL; + goto unlock; + } + + if (zs == BLK_ZS_EMPTY) { + ret = qcow2_write_wp_at(bs, wp, index, BLK_ZS_EMPTY); + } else { + ret = qcow2_write_wp_at(bs, wp, index, BLK_ZS_CLOSED); + if (!ret) { + s->nr_zones_closed++; + } + } + +unlock: + qemu_co_mutex_unlock(&bs->wps->colock); + return ret; +} + +static int qcow2_finish_zone(BlockDriverState *bs, uint32_t index) { + BDRVQcow2State *s = bs->opaque; + int ret; + + qemu_co_mutex_lock(&bs->wps->colock); + uint64_t *wp = &bs->wps->wp[index]; + BlockZoneState zs = qcow2_get_zs(*wp); + + switch(zs) { + case BLK_ZS_EMPTY: + ret = qcow2_check_zone_resources(bs, BLK_ZS_EMPTY); + if (ret < 0) { + goto unlock; + } + break; + case BLK_ZS_IOPEN: + s->nr_zones_imp_open--; + break; + case BLK_ZS_EOPEN: + s->nr_zones_exp_open--; + break; + case BLK_ZS_CLOSED: + ret = qcow2_check_zone_resources(bs, BLK_ZS_CLOSED); + if (ret < 0) { + goto unlock; + } + s->nr_zones_closed--; + break; + case BLK_ZS_FULL: + ret = 0; + goto unlock; + default: + ret = -EINVAL; + goto unlock; + } + + *wp = ((uint64_t)index + 1) * s->zoned_header.zone_size; + ret = qcow2_write_wp_at(bs, wp, index, BLK_ZS_FULL); + +unlock: + qemu_co_mutex_unlock(&bs->wps->colock); + return ret; +} + +static int qcow2_reset_zone(BlockDriverState *bs, uint32_t index, + int64_t len) { + BDRVQcow2State *s = bs->opaque; + int nrz = bs->bl.nr_zones; + int zone_size = bs->bl.zone_size; + int n, ret = 0; + + qemu_co_mutex_lock(&bs->wps->colock); + uint64_t *wp = &bs->wps->wp[index]; + if (len == bs->total_sectors << BDRV_SECTOR_BITS) { + n = nrz; + index = 0; + } else { + n = len / zone_size; + } + + for (int i = 0; i < n; ++i) { + uint64_t *wp_i = (uint64_t *)(wp + i); + uint64_t wpi_v = *wp_i; + if (QCOW2_ZT_IS_CONV(wpi_v)) { + continue; + } + + BlockZoneState zs = qcow2_get_zs(wpi_v); + switch (zs) { + case BLK_ZS_EMPTY: + break; + case BLK_ZS_IOPEN: + s->nr_zones_imp_open--; + break; + case BLK_ZS_EOPEN: + s->nr_zones_exp_open--; + break; + case BLK_ZS_CLOSED: + s->nr_zones_closed--; + break; + case BLK_ZS_FULL: + break; + default: + ret = -EINVAL; + goto unlock; + } + + if (zs == BLK_ZS_EMPTY) { + continue; + } + + *wp_i = ((uint64_t)index + i) * zone_size; + ret = qcow2_write_wp_at(bs, wp_i, index + i, BLK_ZS_EMPTY); + if (ret < 0) { + goto unlock; + } + /* clear data */ + ret = qcow2_co_pwrite_zeroes(bs, qcow2_get_wp(*wp_i), zone_size, 0); + if (ret < 0) { + error_report("Failed to reset zone at 0x%" PRIx64 "", *wp_i); + } + } + +unlock: + qemu_co_mutex_unlock(&bs->wps->colock); + return ret; +} + +static int coroutine_fn qcow2_co_zone_mgmt(BlockDriverState *bs, BlockZoneOp op, + int64_t offset, int64_t len) +{ + BDRVQcow2State *s = bs->opaque; + int ret = 0; + int64_t capacity = bs->total_sectors << BDRV_SECTOR_BITS; + int64_t zone_size = s->zoned_header.zone_size; + int64_t zone_size_mask = zone_size - 1; + uint32_t index = offset / zone_size; + BlockZoneWps *wps = bs->wps; + + if (offset >= capacity) { + error_report("offset %" PRId64 " is equal to or greater than the" + "device capacity %" PRId64 "", offset, capacity); + return -EINVAL; + } + + if (offset & zone_size_mask) { + error_report("sector offset %" PRId64 " is not aligned to zone size" + " %" PRId64 "", offset / 512, zone_size / 512); + return -EINVAL; + } + + if (((offset + len) < capacity && len & zone_size_mask) || + offset + len > capacity) { + error_report("number of sectors %" PRId64 " is not aligned to zone" + " size %" PRId64 "", len / 512, zone_size / 512); + return -EINVAL; + } + + qemu_co_mutex_lock(&wps->colock); + uint64_t wpv = wps->wp[index]; + if (QCOW2_ZT_IS_CONV(wpv) && len != capacity) { + error_report("zone mgmt operations are not allowed for " + "conventional zones"); + ret = -EIO; + goto unlock; + } + qemu_co_mutex_unlock(&wps->colock); + + switch(op) { + case BLK_ZO_OPEN: + ret = qcow2_open_zone(bs, index); + break; + case BLK_ZO_CLOSE: + ret = qcow2_close_zone(bs, index); + break; + case BLK_ZO_FINISH: + ret = qcow2_finish_zone(bs, index); + break; + case BLK_ZO_RESET: + ret = qcow2_reset_zone(bs, index, len); + break; + default: + error_report("Unsupported zone op: 0x%x", op); + ret = -ENOTSUP; + break; + } + return ret; + +unlock: + qemu_co_mutex_unlock(&wps->colock); + return ret; +} + +static int coroutine_fn +qcow2_co_zone_append(BlockDriverState *bs, int64_t *offset, QEMUIOVector *qiov, + BdrvRequestFlags flags) +{ + assert(flags == 0); + int64_t capacity = bs->total_sectors << BDRV_SECTOR_BITS; + uint32_t index; + int ret; + int64_t zone_size_mask = bs->bl.zone_size - 1; + int64_t iov_len = 0; + int64_t len = 0; + + if (*offset >= capacity) { + error_report("*offset %" PRId64 " is equal to or greater than the" + "device capacity %" PRId64 "", *offset, capacity); + return -EINVAL; + } + + /* offset + len should not pass the end of that zone starting from offset */ + if (*offset & zone_size_mask) { + error_report("sector offset %" PRId64 " is not aligned to zone size " + "%" PRId32 "", *offset / 512, bs->bl.zone_size / 512); + return -EINVAL; + } + + int64_t wg = bs->bl.write_granularity; + int64_t wg_mask = wg - 1; + for (int i = 0; i < qiov->niov; i++) { + iov_len = qiov->iov[i].iov_len; + if (iov_len & wg_mask) { + error_report("len of IOVector[%d] %" PRId64 " is not aligned to " + "block size %" PRId64 "", i, iov_len, wg); + return -EINVAL; + } + } + len = qiov->size; + index = *offset / bs->bl.zone_size; + + if ((len >> BDRV_SECTOR_BITS) > bs->bl.max_append_sectors) { + return -ENOTSUP; + } + + qemu_co_mutex_lock(&bs->wps->colock); + uint64_t wp = bs->wps->wp[index]; + uint64_t wp_i = qcow2_get_wp(wp); + ret = qcow2_co_pwritev_part(bs, wp_i, len, qiov, 0, 0); + if (ret == 0) { + *offset = wp_i; + /* the zone state is set to full when the wp reaches the end */ + uint64_t wp_final = bs->wps->wp[index]; + if (!(qcow2_get_wp(wp_final) & zone_size_mask)) { + ret = qcow2_write_wp_at(bs, &wp_final, index, BLK_ZS_FULL); + } + } else { + error_report("qcow2: zap failed"); + } + + qemu_co_mutex_unlock(&bs->wps->colock); + return ret; +} + static int coroutine_fn GRAPH_RDLOCK qcow2_co_copy_range_from(BlockDriverState *bs, BdrvChild *src, int64_t src_offset, @@ -XXX,XX +XXX,XX @@ BlockDriver bdrv_qcow2 = { .bdrv_co_pwritev_part = qcow2_co_pwritev_part, .bdrv_co_flush_to_os = qcow2_co_flush_to_os, + .bdrv_co_zone_report = qcow2_co_zone_report, + .bdrv_co_zone_mgmt = qcow2_co_zone_mgmt, + .bdrv_co_zone_append = qcow2_co_zone_append, + .bdrv_co_pwrite_zeroes = qcow2_co_pwrite_zeroes, .bdrv_co_pdiscard = qcow2_co_pdiscard, .bdrv_co_copy_range_from = qcow2_co_copy_range_from, 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 Qcow2ZonedHeaderExtension { uint32_t max_active_zones; uint32_t max_open_zones; uint32_t max_append_sectors; + uint64_t zonedmeta_offset; + uint64_t zonedmeta_size; } QEMU_PACKED Qcow2ZonedHeaderExtension; typedef struct Qcow2UnknownHeaderExtension { diff --git a/block/trace-events b/block/trace-events index XXXXXXX..XXXXXXX 100644 --- a/block/trace-events +++ b/block/trace-events @@ -XXX,XX +XXX,XX @@ qcow2_writev_data(void *co, uint64_t offset) "co %p offset 0x%" PRIx64 qcow2_pwrite_zeroes_start_req(void *co, int64_t offset, int64_t bytes) "co %p offset 0x%" PRIx64 " bytes %" PRId64 qcow2_pwrite_zeroes(void *co, int64_t offset, int64_t bytes) "co %p offset 0x%" PRIx64 " bytes %" PRId64 qcow2_skip_cow(void *co, uint64_t offset, int nb_clusters) "co %p offset 0x%" PRIx64 " nb_clusters %d" +qcow2_wp_tracking(int index, uint64_t wp) "wps[%d]: 0x%" PRIx64 # qcow2-cluster.c qcow2_alloc_clusters_offset(void *co, uint64_t offset, int bytes) "co %p offset 0x%" PRIx64 " bytes %d" 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 fields of the zoned extension are: The maximal data size in sectors of a zone append request that can be issued to the device. + 36 - 43: zonedmeta_offset + The offset of zoned metadata structure in the file in bytes. + + 44 - 51: zonedmeta_size + The size of zoned metadata in bytes. + == Full disk encryption header pointer == The full disk encryption header must be present if, and only if, the -- 2.40.1
The zoned format feature can be tested by: $ tests/qemu-iotests/check -qcow2 zoned-qcow2 Signed-off-by: Sam Li <faithilikerun@gmail.com> Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com> --- tests/qemu-iotests/tests/zoned-qcow2 | 135 ++++++++++++++++++++++ tests/qemu-iotests/tests/zoned-qcow2.out | 140 +++++++++++++++++++++++ 2 files changed, 275 insertions(+) create mode 100755 tests/qemu-iotests/tests/zoned-qcow2 create mode 100644 tests/qemu-iotests/tests/zoned-qcow2.out diff --git a/tests/qemu-iotests/tests/zoned-qcow2 b/tests/qemu-iotests/tests/zoned-qcow2 new file mode 100755 index XXXXXXX..XXXXXXX --- /dev/null +++ b/tests/qemu-iotests/tests/zoned-qcow2 @@ -XXX,XX +XXX,XX @@ +#!/usr/bin/env bash +# +# Test zone management operations for qcow2 file. +# + +seq="$(basename $0)" +echo "QA output created by $seq" +status=1 # failure is the default! + +file_name="zbc.qcow2" +_cleanup() +{ + _cleanup_test_img + _rm_test_img "$file_name" +} +trap "_cleanup; exit \$status" 0 1 2 3 15 + +# get standard environment, filters and checks +. ../common.rc +. ../common.filter +. ../common.qemu + +# This test only runs on Linux hosts with qcow2 image files. +_supported_fmt qcow2 +_supported_proto file +_supported_os Linux + +echo +echo "=== Initial image setup ===" +echo + +$QEMU_IMG create -f qcow2 $file_name -o size=768M -o zone_size=64M \ +-o zone_capacity=64M -o nr_conv_zones=0 -o max_append_sectors=131072 \ +-o max_open_zones=0 -o max_active_zones=0 -o zone_model=1 + +IMG="--image-opts -n driver=qcow2,file.driver=file,file.filename=$file_name" +QEMU_IO_OPTIONS=$QEMU_IO_OPTIONS_NO_FMT + +echo +echo "=== Testing a qcow2 img with zoned format ===" +echo +echo "case 1: test if one zone operation works" + +echo "(1) report zones[0]:" +$QEMU_IO $IMG -c "zrp 0 1" +echo +echo "report zones[0~9]:" +$QEMU_IO $IMG -c "zrp 0 10" +echo +echo "report the last zone:" +$QEMU_IO $IMG -c "zrp 0x2C000000 2" # 0x2C000000 / 512 = 0x160000 +echo +echo +echo "open zones[0]:" +$QEMU_IO $IMG -c "zo 0 0x4000000" # 0x4000000 / 512 = 0x20000 +$QEMU_IO $IMG -c "zrp 0 1" +echo +echo "open zones[1]" +$QEMU_IO $IMG -c "zo 0x4000000 0x4000000" +$QEMU_IO $IMG -c "zrp 0x4000000 1" +echo +echo "open the last zone" +$QEMU_IO $IMG -c "zo 0x2C000000 0x4000000" +$QEMU_IO $IMG -c "zrp 0x2C000000 2" +echo +echo +echo "close zones[0]" +$QEMU_IO $IMG -c "zc 0 0x4000000" +$QEMU_IO $IMG -c "zrp 0 1" +echo +echo "close the last zone" +$QEMU_IO $IMG -c "zc 0x3e70000000 0x4000000" +$QEMU_IO $IMG -c "zrp 0x3e70000000 2" +echo +echo +echo "(4) finish zones[1]" +$QEMU_IO $IMG -c "zf 0x4000000 0x4000000" +$QEMU_IO $IMG -c "zrp 0x4000000 1" +echo +echo +echo "(5) reset zones[1]" +$QEMU_IO $IMG -c "zrs 0x4000000 0x4000000" +$QEMU_IO $IMG -c "zrp 0x4000000 1" +echo +echo +echo "(6) append write with (4k, 8k) data" # the physical block size of the device is 4096 +$QEMU_IO $IMG -c "zrp 0 12" +echo "Append write zones[0] one time:" +$QEMU_IO $IMG -c "zap -p 0 0x1000 0x2000" +$QEMU_IO $IMG -c "zrp 0 1" +echo +echo "Append write zones[0] twice:" +$QEMU_IO $IMG -c "zap -p 0 0x1000 0x2000" +$QEMU_IO $IMG -c "zrp 0 1" +echo +echo "Append write zones[1] one time:" +$QEMU_IO $IMG -c "zap -p 0x4000000 0x1000 0x2000" +$QEMU_IO $IMG -c "zrp 0x4000000 1" +echo +echo "Append write zones[1] twice:" +$QEMU_IO $IMG -c "zap -p 0x4000000 0x1000 0x2000" +$QEMU_IO $IMG -c "zrp 0x4000000 1" +echo +echo "Reset all:" +$QEMU_IO $IMG -c "zrs 0 768M" +$QEMU_IO $IMG -c "zrp 0 12" +echo +echo +echo "case 2: test a sets of ops that works or not" + +echo "(1) append write (4k, 4k) and then write to full" +$QEMU_IO $IMG -c "zap -p 0 0x1000 0x1000" +echo "wrote (4k, 4k):" +$QEMU_IO $IMG -c "zrp 0 1" +$QEMU_IO $IMG -c "zap -p 0 0x1000 0x3ffd000" +echo "wrote to full:" +$QEMU_IO $IMG -c "zrp 0 1" +echo "Reset zones[0]:" +$QEMU_IO $IMG -c "zrs 0 64M" +$QEMU_IO $IMG -c "zrp 0 1" + +echo "(2) write in zones[0], zones[3], zones[8], and then reset all" +$QEMU_IO $IMG -c "zap -p 0 0x1000 0x1000" +$QEMU_IO $IMG -c "zap -p 0xc000000 0x1000 0x1000" +$QEMU_IO $IMG -c "zap -p 0x20000000 0x1000 0x1000" +echo "wrote three zones:" +$QEMU_IO $IMG -c "zrp 0 12" +echo "Reset all:" +$QEMU_IO $IMG -c "zrs 0 768M" +$QEMU_IO $IMG -c "zrp 0 12" + +# success, all done +echo "*** done" +rm -f $seq.full +status=0 diff --git a/tests/qemu-iotests/tests/zoned-qcow2.out b/tests/qemu-iotests/tests/zoned-qcow2.out new file mode 100644 index XXXXXXX..XXXXXXX --- /dev/null +++ b/tests/qemu-iotests/tests/zoned-qcow2.out @@ -XXX,XX +XXX,XX @@ +QA output created by zoned-qcow2 + +=== Initial image setup === + +Formatting 'zbc.qcow2', fmt=qcow2 cluster_size=65536 extended_l2=off compression_type=zlib zone_model=1 zone_size=67108864 zone_capacity=67108864 nr_conv_zones=0 max_append_sectors=131072 max_active_zones=0 max_open_zones=0 size=805306368 lazy_refcounts=off refcount_bits=16 + +=== Testing a qcow2 img with zoned format === + +case 1: test if one zone operation works +(1) report zones[0]: +start: 0x0, len 0x20000, cap 0x20000, wptr 0x0, zcond:1, [type: 2] + +report zones[0~9]: +start: 0x0, len 0x20000, cap 0x20000, wptr 0x0, zcond:1, [type: 2] +start: 0x20000, len 0x20000, cap 0x20000, wptr 0x20000, zcond:1, [type: 2] +start: 0x40000, len 0x20000, cap 0x20000, wptr 0x40000, zcond:1, [type: 2] +start: 0x60000, len 0x20000, cap 0x20000, wptr 0x60000, zcond:1, [type: 2] +start: 0x80000, len 0x20000, cap 0x20000, wptr 0x80000, zcond:1, [type: 2] +start: 0xa0000, len 0x20000, cap 0x20000, wptr 0xa0000, zcond:1, [type: 2] +start: 0xc0000, len 0x20000, cap 0x20000, wptr 0xc0000, zcond:1, [type: 2] +start: 0xe0000, len 0x20000, cap 0x20000, wptr 0xe0000, zcond:1, [type: 2] +start: 0x100000, len 0x20000, cap 0x20000, wptr 0x100000, zcond:1, [type: 2] +start: 0x120000, len 0x20000, cap 0x20000, wptr 0x120000, zcond:1, [type: 2] + +report the last zone: +start: 0x160000, len 0x20000, cap 0x20000, wptr 0x160000, zcond:1, [type: 2] + + +open zones[0]: +start: 0x0, len 0x20000, cap 0x20000, wptr 0x0, zcond:3, [type: 2] + +open zones[1] +start: 0x20000, len 0x20000, cap 0x20000, wptr 0x20000, zcond:3, [type: 2] + +open the last zone +start: 0x160000, len 0x20000, cap 0x20000, wptr 0x160000, zcond:3, [type: 2] + + +close zones[0] +start: 0x0, len 0x20000, cap 0x20000, wptr 0x0, zcond:4, [type: 2] + +close the last zone +zone close failed: Input/output error +qemu-io: offset 268167020544 is equal to or greater than thedevice capacity 805306368 +zone report failed: Invalid argument + + +(4) finish zones[1] +start: 0x20000, len 0x20000, cap 0x20000, wptr 0x40000, zcond:14, [type: 2] + + +(5) reset zones[1] +start: 0x20000, len 0x20000, cap 0x20000, wptr 0x20000, zcond:1, [type: 2] + + +(6) append write with (4k, 8k) data +start: 0x0, len 0x20000, cap 0x20000, wptr 0x0, zcond:4, [type: 2] +start: 0x20000, len 0x20000, cap 0x20000, wptr 0x20000, zcond:1, [type: 2] +start: 0x40000, len 0x20000, cap 0x20000, wptr 0x40000, zcond:1, [type: 2] +start: 0x60000, len 0x20000, cap 0x20000, wptr 0x60000, zcond:1, [type: 2] +start: 0x80000, len 0x20000, cap 0x20000, wptr 0x80000, zcond:1, [type: 2] +start: 0xa0000, len 0x20000, cap 0x20000, wptr 0xa0000, zcond:1, [type: 2] +start: 0xc0000, len 0x20000, cap 0x20000, wptr 0xc0000, zcond:1, [type: 2] +start: 0xe0000, len 0x20000, cap 0x20000, wptr 0xe0000, zcond:1, [type: 2] +start: 0x100000, len 0x20000, cap 0x20000, wptr 0x100000, zcond:1, [type: 2] +start: 0x120000, len 0x20000, cap 0x20000, wptr 0x120000, zcond:1, [type: 2] +start: 0x140000, len 0x20000, cap 0x20000, wptr 0x140000, zcond:1, [type: 2] +start: 0x160000, len 0x20000, cap 0x20000, wptr 0x160000, zcond:3, [type: 2] +Append write zones[0] one time: +After zap done, the append sector is 0x0 +start: 0x0, len 0x20000, cap 0x20000, wptr 0x18, zcond:2, [type: 2] + +Append write zones[0] twice: +After zap done, the append sector is 0x18 +start: 0x0, len 0x20000, cap 0x20000, wptr 0x30, zcond:2, [type: 2] + +Append write zones[1] one time: +After zap done, the append sector is 0x20000 +start: 0x20000, len 0x20000, cap 0x20000, wptr 0x20018, zcond:2, [type: 2] + +Append write zones[1] twice: +After zap done, the append sector is 0x20018 +start: 0x20000, len 0x20000, cap 0x20000, wptr 0x20030, zcond:2, [type: 2] + +Reset all: +start: 0x0, len 0x20000, cap 0x20000, wptr 0x0, zcond:1, [type: 2] +start: 0x20000, len 0x20000, cap 0x20000, wptr 0x20000, zcond:1, [type: 2] +start: 0x40000, len 0x20000, cap 0x20000, wptr 0x40000, zcond:1, [type: 2] +start: 0x60000, len 0x20000, cap 0x20000, wptr 0x60000, zcond:1, [type: 2] +start: 0x80000, len 0x20000, cap 0x20000, wptr 0x80000, zcond:1, [type: 2] +start: 0xa0000, len 0x20000, cap 0x20000, wptr 0xa0000, zcond:1, [type: 2] +start: 0xc0000, len 0x20000, cap 0x20000, wptr 0xc0000, zcond:1, [type: 2] +start: 0xe0000, len 0x20000, cap 0x20000, wptr 0xe0000, zcond:1, [type: 2] +start: 0x100000, len 0x20000, cap 0x20000, wptr 0x100000, zcond:1, [type: 2] +start: 0x120000, len 0x20000, cap 0x20000, wptr 0x120000, zcond:1, [type: 2] +start: 0x140000, len 0x20000, cap 0x20000, wptr 0x140000, zcond:1, [type: 2] +start: 0x160000, len 0x20000, cap 0x20000, wptr 0x160000, zcond:1, [type: 2] + + +case 2: test a sets of ops that works or not +(1) append write (4k, 4k) and then write to full +After zap done, the append sector is 0x0 +wrote (4k, 4k): +start: 0x0, len 0x20000, cap 0x20000, wptr 0x10, zcond:2, [type: 2] +After zap done, the append sector is 0x10 +wrote to full: +start: 0x0, len 0x20000, cap 0x20000, wptr 0x20000, zcond:14, [type: 2] +Reset zones[0]: +start: 0x0, len 0x20000, cap 0x20000, wptr 0x0, zcond:1, [type: 2] +(2) write in zones[0], zones[3], zones[8], and then reset all +After zap done, the append sector is 0x0 +After zap done, the append sector is 0x60000 +After zap done, the append sector is 0x100000 +wrote three zones: +start: 0x0, len 0x20000, cap 0x20000, wptr 0x10, zcond:2, [type: 2] +start: 0x20000, len 0x20000, cap 0x20000, wptr 0x20000, zcond:1, [type: 2] +start: 0x40000, len 0x20000, cap 0x20000, wptr 0x40000, zcond:1, [type: 2] +start: 0x60000, len 0x20000, cap 0x20000, wptr 0x60010, zcond:2, [type: 2] +start: 0x80000, len 0x20000, cap 0x20000, wptr 0x80000, zcond:1, [type: 2] +start: 0xa0000, len 0x20000, cap 0x20000, wptr 0xa0000, zcond:1, [type: 2] +start: 0xc0000, len 0x20000, cap 0x20000, wptr 0xc0000, zcond:1, [type: 2] +start: 0xe0000, len 0x20000, cap 0x20000, wptr 0xe0000, zcond:1, [type: 2] +start: 0x100000, len 0x20000, cap 0x20000, wptr 0x100010, zcond:2, [type: 2] +start: 0x120000, len 0x20000, cap 0x20000, wptr 0x120000, zcond:1, [type: 2] +start: 0x140000, len 0x20000, cap 0x20000, wptr 0x140000, zcond:1, [type: 2] +start: 0x160000, len 0x20000, cap 0x20000, wptr 0x160000, zcond:1, [type: 2] +Reset all: +start: 0x0, len 0x20000, cap 0x20000, wptr 0x0, zcond:1, [type: 2] +start: 0x20000, len 0x20000, cap 0x20000, wptr 0x20000, zcond:1, [type: 2] +start: 0x40000, len 0x20000, cap 0x20000, wptr 0x40000, zcond:1, [type: 2] +start: 0x60000, len 0x20000, cap 0x20000, wptr 0x60000, zcond:1, [type: 2] +start: 0x80000, len 0x20000, cap 0x20000, wptr 0x80000, zcond:1, [type: 2] +start: 0xa0000, len 0x20000, cap 0x20000, wptr 0xa0000, zcond:1, [type: 2] +start: 0xc0000, len 0x20000, cap 0x20000, wptr 0xc0000, zcond:1, [type: 2] +start: 0xe0000, len 0x20000, cap 0x20000, wptr 0xe0000, zcond:1, [type: 2] +start: 0x100000, len 0x20000, cap 0x20000, wptr 0x100000, zcond:1, [type: 2] +start: 0x120000, len 0x20000, cap 0x20000, wptr 0x120000, zcond:1, [type: 2] +start: 0x140000, len 0x20000, cap 0x20000, wptr 0x140000, zcond:1, [type: 2] +start: 0x160000, len 0x20000, cap 0x20000, wptr 0x160000, zcond:1, [type: 2] +*** done -- 2.40.1
This patch series add a new extension - zoned format - to the qcow2 driver thereby allowing full zoned storage emulation on the qcow2 img file. Users can attach such a qcow2 file to the guest as a zoned device. Write pointer are preserved in the zoned metadata. It will be recovered after power cycle. Meanwhile, any open (implicit or explicit) zone will show up as closed. Zone states are in memory. Read-only and offline states are device-internal events, which are not considerred in qcow2 emulation for simplicity. The other zone states (closed, empty, full) can be inferred from write poiner values, presistent across QEMU reboots. The open states are kept in memory using open zone lists. To create a qcow2 file with zoned format, use command like this: Then add it to the QEMU command line: -blockdev node-name=drive1,driver=qcow2,file.driver=file,file.filename=../qemu/test.qcow2 \ -device virtio-blk-pci,drive=drive1 \ v6->v7: - modify zone resource managemant (style) [Damien] - fix accessing list with negative index err - add some tests for zrm in iotests - address review comments [Markus] v5->v6: - fix docs and specs [Eric, Markus, Stefan] - add general sanity checks for zoned device configurations while creation and opening [Eric] - fix LRU when implicitly open a zone for a long time [Stefan] v4->v5: - add incompatible bit for zoned format [Eric] - fix and manage zone resources via LRU [Damien] - renaming functions and fields, spec changes [Markus, Damien] - add closed zone list - make qemu iotests for zoned device consecutive [Stefan] v3->v4: - use QLIST for implicit, explicit open zones management [Stefan] - keep zone states in memory and drop state bits in wp metadata structure [Damien, Stefan] - change zone resource management and iotests accordingly - add tracing for number of implicit zones - address review comments [Stefan, Markus]: * documentation, config, style v2->v3: - drop zoned_profile option [Klaus] - reformat doc comments of qcow2 [Markus] - add input validation and checks for zoned information [Stefan] - code style: format, comments, documentation, naming [Stefan] - add tracing function for wp tracking [Stefan] - reconstruct io path in check_zone_resources [Stefan] v1->v2: - add more tests to qemu-io zoned commands - make zone append change state to full when wp reaches end - add documentation to qcow2 zoned extension header - address review comments (Stefan): * fix zoned_mata allocation size * use bitwise or than addition * fix wp index overflow and locking * cleanups: comments, naming Sam Li (4): docs/qcow2: add the zoned format feature qcow2: add configurations for zoned format extension qcow2: add zoned emulation capability iotests: test the zoned format feature for qcow2 file block/qcow2.c | 1041 +++++++++++++++++++++- block/qcow2.h | 36 +- block/trace-events | 2 + docs/interop/qcow2.txt | 107 ++- docs/system/qemu-block-drivers.rst.inc | 42 + include/block/block_int-common.h | 13 + include/qemu/queue.h | 1 + qapi/block-core.json | 67 +- tests/qemu-iotests/tests/zoned-qcow2 | 147 +++ tests/qemu-iotests/tests/zoned-qcow2.out | 172 ++++ 10 files changed, 1621 insertions(+), 7 deletions(-) create mode 100755 tests/qemu-iotests/tests/zoned-qcow2 create mode 100644 tests/qemu-iotests/tests/zoned-qcow2.out -- 2.40.1
Add the specs for the zoned format feature of the qcow2 driver. The qcow2 file then can emulate real zoned devices, either passed through by virtio-blk device or NVMe ZNS drive to the guest given zoned information. Signed-off-by: Sam Li <faithilikerun@gmail.com> Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com> --- docs/system/qemu-block-drivers.rst.inc | 42 ++++++++++++++++++++++++++ 1 file changed, 42 insertions(+) diff --git a/docs/system/qemu-block-drivers.rst.inc b/docs/system/qemu-block-drivers.rst.inc index XXXXXXX..XXXXXXX 100644 --- a/docs/system/qemu-block-drivers.rst.inc +++ b/docs/system/qemu-block-drivers.rst.inc @@ -XXX,XX +XXX,XX @@ This section describes each format and the options that are supported for it. filename`` to check if the NOCOW flag is set or not (Capital 'C' is NOCOW flag). + .. option:: zone.mode + If this is set to ``host-managed``, the image is an emulated zoned + block device. This option is only valid to emulated zoned device files. + + .. option:: zone.size + + The size of a zone in bytes. The device is divided into zones of this + size with the exception of the last zone, which may be smaller. + + .. option:: zone.capacity + + The initial capacity value, in bytes, for all zones. The capacity must + be less than or equal to zone size. If the last zone is smaller, then + its capacity is capped. + + The zone capacity is per zone and may be different between zones in real + devices. QCow2 sets all zones to the same capacity. + + .. option:: zone.conventional_zones + + The number of conventional zones of the zoned device. + + .. option:: zone.max_active_zones + + The limit of the zones with implicit open, explicit open or closed state. + + The max active zones must be less or equal to the number of SWR + (sequential write required) zones of the device. + + .. option:: zone.max_open_zones + + The maximal allowed open zones. The max open zones must not be larger than + the max active zones. + + If the limits of open zones or active zones are equal to the number of + SWR zones, then it is the same as having no limits. + + .. option:: zone.max_append_bytes + + The number of bytes in a zone append request that can be issued to the + device. It must be 512-byte aligned and less than the zone capacity. + .. program:: image-formats .. option:: qed -- 2.40.1
To configure the zoned format feature on the qcow2 driver, it requires settings as: the device size, zone model, zone size, zone capacity, number of conventional zones, limits on zone resources (max append bytes, max open zones, and max_active_zones). To create a qcow2 image with zoned format feature, use command like this: qemu-img create -f qcow2 zbc.qcow2 -o size=768M \ -o zone.size=64M -o zone.capacity=64M -o zone.conventional_zones=0 \ -o zone.max_append_bytes=4096 -o zone.max_open_zones=6 \ -o zone.max_active_zones=8 -o zone.mode=host-managed Signed-off-by: Sam Li <faithilikerun@gmail.com> --- block/qcow2.c | 252 ++++++++++++++++++++++++++++++- block/qcow2.h | 36 ++++- docs/interop/qcow2.txt | 107 ++++++++++++- include/block/block_int-common.h | 13 ++ qapi/block-core.json | 67 +++++++- 5 files changed, 469 insertions(+), 6 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 @@ typedef struct { #define QCOW2_EXT_MAGIC_CRYPTO_HEADER 0x0537be77 #define QCOW2_EXT_MAGIC_BITMAPS 0x23852875 #define QCOW2_EXT_MAGIC_DATA_FILE 0x44415441 +#define QCOW2_EXT_MAGIC_ZONED_FORMAT 0x007a6264 static int coroutine_fn qcow2_co_preadv_compressed(BlockDriverState *bs, @@ -XXX,XX +XXX,XX @@ qcow2_extract_crypto_opts(QemuOpts *opts, const char *fmt, Error **errp) return cryptoopts_qdict; } +/* + * Passing by the zoned device configurations by a zoned_header struct, check + * if the zone device options are under constraints. Return false when some + * option is invalid + */ +static inline bool +qcow2_check_zone_options(Qcow2ZonedHeaderExtension *zone_opt) +{ + if (zone_opt) { + uint32_t sequential_zones; + + if (zone_opt->zone_size == 0) { + error_report("Zoned extension header zone_size field " + "can not be 0"); + return false; + } + + if (zone_opt->zone_capacity > zone_opt->zone_size) { + error_report("zone capacity %" PRIu32 "B exceeds zone size " + "%" PRIu32 "B", zone_opt->zone_capacity, + zone_opt->zone_size); + return false; + } + + if (zone_opt->max_append_bytes + BDRV_SECTOR_SIZE >= + zone_opt->zone_capacity) { + error_report("max append bytes %" PRIu32 "B exceeds zone " + "capacity %" PRIu32 "B by more than block size", + zone_opt->zone_capacity, + zone_opt->max_append_bytes); + return false; + } + + if (zone_opt->max_active_zones > zone_opt->nr_zones) { + error_report("Max_active_zones %" PRIu32 " exceeds " + "nr_zones %" PRIu32 ". Set it to nr_zones.", + zone_opt->max_active_zones, zone_opt->nr_zones); + zone_opt->max_active_zones = zone_opt->nr_zones; + } + + if (zone_opt->max_open_zones > zone_opt->max_active_zones) { + error_report("Max_open_zones %" PRIu32 " exceeds " + "max_active_zones %" PRIu32 ". Set it to " + "max_active_zones.", + zone_opt->max_open_zones, + zone_opt->max_active_zones); + zone_opt->max_open_zones = zone_opt->max_active_zones; + } + + sequential_zones = zone_opt->nr_zones - zone_opt->conventional_zones; + if (zone_opt->max_open_zones > sequential_zones) { + error_report("Max_open_zones field can not be larger " + "than the number of SWR zones. Set it to number of " + "SWR zones %" PRIu32 ".", sequential_zones); + zone_opt->max_open_zones = sequential_zones; + } + + return true; + } + return false; +} + /* * read qcow2 extension and fill bs * start reading from start_offset @@ -XXX,XX +XXX,XX @@ qcow2_read_extensions(BlockDriverState *bs, uint64_t start_offset, uint64_t offset; int ret; Qcow2BitmapHeaderExt bitmaps_ext; + Qcow2ZonedHeaderExtension zoned_ext; if (need_update_header != NULL) { *need_update_header = false; @@ -XXX,XX +XXX,XX @@ qcow2_read_extensions(BlockDriverState *bs, uint64_t start_offset, break; } + case QCOW2_EXT_MAGIC_ZONED_FORMAT: + { + if (ext.len < sizeof(zoned_ext)) { + /* Missing fields */ + error_setg(errp, "zoned_ext: len=%" PRIu32 " too small " + "(<%zu)", ext.len, sizeof(zoned_ext)); + return -EINVAL; + } + ret = bdrv_pread(bs->file, offset, ext.len, &zoned_ext, 0); + if (ret < 0) { + error_setg_errno(errp, -ret, "zoned_ext: " + "Could not read ext header"); + return ret; + } + + zoned_ext.zone_size = be32_to_cpu(zoned_ext.zone_size); + zoned_ext.zone_capacity = be32_to_cpu(zoned_ext.zone_capacity); + zoned_ext.conventional_zones = + be32_to_cpu(zoned_ext.conventional_zones); + zoned_ext.nr_zones = be32_to_cpu(zoned_ext.nr_zones); + zoned_ext.max_open_zones = be32_to_cpu(zoned_ext.max_open_zones); + zoned_ext.max_active_zones = + be32_to_cpu(zoned_ext.max_active_zones); + zoned_ext.max_append_bytes = + be32_to_cpu(zoned_ext.max_append_bytes); + s->zoned_header = zoned_ext; + + /* refuse to open broken images */ + if (zoned_ext.nr_zones != DIV_ROUND_UP(bs->total_sectors * + BDRV_SECTOR_SIZE, zoned_ext.zone_size)) { + error_setg(errp, "Zoned extension header nr_zones field " + "is wrong"); + return -EINVAL; + } + if (!qcow2_check_zone_options(&zoned_ext)) { + return -EINVAL; + } + +#ifdef DEBUG_EXT + printf("Qcow2: Got zoned format extension: " + "offset=%" PRIu32 "\n", offset); +#endif + break; + } + default: /* unknown magic - save it in case we need to rewrite the header */ /* If you add a new feature, make sure to also update the fast @@ -XXX,XX +XXX,XX @@ static void qcow2_refresh_limits(BlockDriverState *bs, Error **errp) } bs->bl.pwrite_zeroes_alignment = s->subcluster_size; bs->bl.pdiscard_alignment = s->cluster_size; + bs->bl.zoned = s->zoned_header.zoned; + bs->bl.nr_zones = s->zoned_header.nr_zones; + bs->bl.max_append_sectors = s->zoned_header.max_append_bytes + >> BDRV_SECTOR_BITS; + bs->bl.max_active_zones = s->zoned_header.max_active_zones; + bs->bl.max_open_zones = s->zoned_header.max_open_zones; + bs->bl.zone_size = s->zoned_header.zone_size; + bs->bl.zone_capacity = s->zoned_header.zone_capacity; + bs->bl.write_granularity = BDRV_SECTOR_SIZE; } static int GRAPH_UNLOCKED @@ -XXX,XX +XXX,XX @@ int qcow2_update_header(BlockDriverState *bs) .bit = QCOW2_INCOMPAT_EXTL2_BITNR, .name = "extended L2 entries", }, + { + .type = QCOW2_FEAT_TYPE_INCOMPATIBLE, + .bit = QCOW2_INCOMPAT_ZONED_FORMAT_BITNR, + .name = "zoned format", + }, { .type = QCOW2_FEAT_TYPE_COMPATIBLE, .bit = QCOW2_COMPAT_LAZY_REFCOUNTS_BITNR, @@ -XXX,XX +XXX,XX @@ int qcow2_update_header(BlockDriverState *bs) buflen -= ret; } + /* Zoned devices header extension */ + if (s->zoned_header.zoned == BLK_Z_HM) { + Qcow2ZonedHeaderExtension zoned_header = { + .zoned = s->zoned_header.zoned, + .zone_size = cpu_to_be32(s->zoned_header.zone_size), + .zone_capacity = cpu_to_be32(s->zoned_header.zone_capacity), + .conventional_zones = + cpu_to_be32(s->zoned_header.conventional_zones), + .nr_zones = cpu_to_be32(s->zoned_header.nr_zones), + .max_open_zones = cpu_to_be32(s->zoned_header.max_open_zones), + .max_active_zones = + cpu_to_be32(s->zoned_header.max_active_zones), + .max_append_bytes = + cpu_to_be32(s->zoned_header.max_append_bytes) + }; + ret = header_ext_add(buf, QCOW2_EXT_MAGIC_ZONED_FORMAT, + &zoned_header, sizeof(zoned_header), + buflen); + if (ret < 0) { + goto fail; + } + buf += ret; + buflen -= ret; + } + /* Keep unknown header extensions */ QLIST_FOREACH(uext, &s->unknown_header_ext, next) { ret = header_ext_add(buf, uext->magic, uext->data, uext->len, buflen); @@ -XXX,XX +XXX,XX @@ qcow2_co_create(BlockdevCreateOptions *create_options, Error **errp) { BlockdevCreateOptionsQcow2 *qcow2_opts; QDict *options; + Qcow2ZoneCreateOptions *zone_struct; + Qcow2ZoneHostManaged *zone_host_managed; /* * Open the image file and write a minimal qcow2 header. @@ -XXX,XX +XXX,XX @@ qcow2_co_create(BlockdevCreateOptions *create_options, Error **errp) assert(create_options->driver == BLOCKDEV_DRIVER_QCOW2); qcow2_opts = &create_options->u.qcow2; + zone_struct = create_options->u.qcow2.zone; + zone_host_managed = &create_options->u.qcow2.zone->u.host_managed; bs = bdrv_co_open_blockdev_ref(qcow2_opts->file, errp); if (bs == NULL) { @@ -XXX,XX +XXX,XX @@ qcow2_co_create(BlockdevCreateOptions *create_options, Error **errp) header->incompatible_features |= cpu_to_be64(QCOW2_INCOMPAT_DATA_FILE); } + if (zone_struct->mode == QCOW2_ZONE_MODEL_HOST_MANAGED) { + /* + * The incompatible bit must be set when the zone model is + * host-managed + */ + header->incompatible_features |= + cpu_to_be64(QCOW2_INCOMPAT_ZONED_FORMAT); + } if (qcow2_opts->data_file_raw) { header->autoclear_features |= cpu_to_be64(QCOW2_AUTOCLEAR_DATA_FILE_RAW); @@ -XXX,XX +XXX,XX @@ qcow2_co_create(BlockdevCreateOptions *create_options, Error **errp) bdrv_graph_co_rdlock(); ret = qcow2_alloc_clusters(blk_bs(blk), 3 * cluster_size); if (ret < 0) { - bdrv_graph_co_rdunlock(); error_setg_errno(errp, -ret, "Could not allocate clusters for qcow2 " "header and refcount table"); - goto out; + goto unlock; } else if (ret != 0) { error_report("Huh, first cluster in empty image is already in use?"); @@ -XXX,XX +XXX,XX @@ qcow2_co_create(BlockdevCreateOptions *create_options, Error **errp) } /* Set the external data file if necessary */ + BDRVQcow2State *s = blk_bs(blk)->opaque; if (data_bs) { - BDRVQcow2State *s = blk_bs(blk)->opaque; s->image_data_file = g_strdup(data_bs->filename); } + if (zone_struct->mode == QCOW2_ZONE_MODEL_HOST_MANAGED) { + if (!zone_host_managed->has_size) { + error_setg(errp, "Missing zone_size parameter"); + ret = -EINVAL; + goto unlock; + } + + s->zoned_header.zoned = BLK_Z_HM; + s->zoned_header.zone_size = zone_host_managed->size; + s->zoned_header.nr_zones = DIV_ROUND_UP(qcow2_opts->size, + zone_host_managed->size); + if (zone_host_managed->has_capacity) { + s->zoned_header.zone_capacity = zone_host_managed->capacity; + } else { + s->zoned_header.zone_capacity = zone_host_managed->size; + } + + if (zone_host_managed->has_conventional_zones) { + s->zoned_header.conventional_zones = + zone_host_managed->conventional_zones; + } + + if (zone_host_managed->has_max_active_zones) { + s->zoned_header.max_active_zones = + zone_host_managed->max_active_zones; + + if (zone_host_managed->has_max_open_zones) { + s->zoned_header.max_open_zones = + zone_host_managed->max_open_zones; + } else { + s->zoned_header.max_open_zones = + zone_host_managed->max_active_zones; + } + } + s->zoned_header.max_append_bytes = zone_host_managed->max_append_bytes; + + if (!qcow2_check_zone_options(&s->zoned_header)) { + s->zoned_header.zoned = BLK_Z_NONE; + ret = -EINVAL; + goto unlock; + } + } else { + s->zoned_header.zoned = BLK_Z_NONE; + } + /* Create a full header (including things like feature table) */ ret = qcow2_update_header(blk_bs(blk)); bdrv_graph_co_rdunlock(); @@ -XXX,XX +XXX,XX @@ qcow2_co_create(BlockdevCreateOptions *create_options, Error **errp) } ret = 0; + goto out; +unlock: + bdrv_graph_co_rdunlock(); out: blk_co_unref(blk); bdrv_co_unref(bs); @@ -XXX,XX +XXX,XX @@ qcow2_co_create_opts(BlockDriver *drv, const char *filename, QemuOpts *opts, { BLOCK_OPT_COMPAT_LEVEL, "version" }, { BLOCK_OPT_DATA_FILE_RAW, "data-file-raw" }, { BLOCK_OPT_COMPRESSION_TYPE, "compression-type" }, + { BLOCK_OPT_CONVENTIONAL_ZONES, "zone.conventional-zones" }, + { BLOCK_OPT_MAX_OPEN_ZONES, "zone.max-open-zones" }, + { BLOCK_OPT_MAX_ACTIVE_ZONES, "zone.max-active-zones" }, + { BLOCK_OPT_MAX_APPEND_BYTES, "zone.max-append-bytes" }, { NULL, NULL }, }; @@ -XXX,XX +XXX,XX @@ static QemuOptsList qcow2_create_opts = { .help = "Compression method used for image cluster " \ "compression", \ .def_value_str = "zlib" \ + }, \ + { \ + .name = BLOCK_OPT_ZONE_MODEL, \ + .type = QEMU_OPT_STRING, \ + .help = "zone model modes, mode choice: host-managed", \ + }, \ + { \ + .name = BLOCK_OPT_ZONE_SIZE, \ + .type = QEMU_OPT_SIZE, \ + .help = "zone size", \ + }, \ + { \ + .name = BLOCK_OPT_ZONE_CAPACITY, \ + .type = QEMU_OPT_SIZE, \ + .help = "zone capacity", \ + }, \ + { \ + .name = BLOCK_OPT_CONVENTIONAL_ZONES, \ + .type = QEMU_OPT_NUMBER, \ + .help = "numbers of conventional zones", \ + }, \ + { \ + .name = BLOCK_OPT_MAX_APPEND_BYTES, \ + .type = QEMU_OPT_SIZE, \ + .help = "max append bytes", \ + }, \ + { \ + .name = BLOCK_OPT_MAX_ACTIVE_ZONES, \ + .type = QEMU_OPT_NUMBER, \ + .help = "max active zones", \ + }, \ + { \ + .name = BLOCK_OPT_MAX_OPEN_ZONES, \ + .type = QEMU_OPT_NUMBER, \ + .help = "max open zones", \ }, QCOW_COMMON_OPTIONS, { /* end of list */ } 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 Qcow2CryptoHeaderExtension { uint64_t length; } QEMU_PACKED Qcow2CryptoHeaderExtension; +typedef struct Qcow2ZonedHeaderExtension { + /* Zoned device attributes */ + uint8_t zoned; + uint8_t reserved[3]; + uint32_t zone_size; + uint32_t zone_capacity; + uint32_t conventional_zones; + uint32_t nr_zones; + uint32_t max_active_zones; + uint32_t max_open_zones; + uint32_t max_append_bytes; + uint64_t zonedmeta_size; + uint64_t zonedmeta_offset; +} QEMU_PACKED Qcow2ZonedHeaderExtension; + +typedef struct Qcow2ZoneListEntry { + QLIST_ENTRY(Qcow2ZoneListEntry) exp_open_zone_entry; + QLIST_ENTRY(Qcow2ZoneListEntry) imp_open_zone_entry; + QLIST_ENTRY(Qcow2ZoneListEntry) closed_zone_entry; +} Qcow2ZoneListEntry; + typedef struct Qcow2UnknownHeaderExtension { uint32_t magic; uint32_t len; @@ -XXX,XX +XXX,XX @@ enum { QCOW2_INCOMPAT_DATA_FILE_BITNR = 2, QCOW2_INCOMPAT_COMPRESSION_BITNR = 3, QCOW2_INCOMPAT_EXTL2_BITNR = 4, + QCOW2_INCOMPAT_ZONED_FORMAT_BITNR = 5, QCOW2_INCOMPAT_DIRTY = 1 << QCOW2_INCOMPAT_DIRTY_BITNR, QCOW2_INCOMPAT_CORRUPT = 1 << QCOW2_INCOMPAT_CORRUPT_BITNR, QCOW2_INCOMPAT_DATA_FILE = 1 << QCOW2_INCOMPAT_DATA_FILE_BITNR, QCOW2_INCOMPAT_COMPRESSION = 1 << QCOW2_INCOMPAT_COMPRESSION_BITNR, QCOW2_INCOMPAT_EXTL2 = 1 << QCOW2_INCOMPAT_EXTL2_BITNR, + QCOW2_INCOMPAT_ZONED_FORMAT = 1 << QCOW2_INCOMPAT_ZONED_FORMAT_BITNR, QCOW2_INCOMPAT_MASK = QCOW2_INCOMPAT_DIRTY | QCOW2_INCOMPAT_CORRUPT | QCOW2_INCOMPAT_DATA_FILE | QCOW2_INCOMPAT_COMPRESSION - | QCOW2_INCOMPAT_EXTL2, + | QCOW2_INCOMPAT_EXTL2 + | QCOW2_INCOMPAT_ZONED_FORMAT, }; /* Compatible feature bits */ @@ -XXX,XX +XXX,XX @@ typedef struct BDRVQcow2State { * is to convert the image with the desired compression type set. */ Qcow2CompressionType compression_type; + + /* States of zoned device */ + Qcow2ZonedHeaderExtension zoned_header; + QLIST_HEAD(, Qcow2ZoneListEntry) exp_open_zones; + QLIST_HEAD(, Qcow2ZoneListEntry) imp_open_zones; + QLIST_HEAD(, Qcow2ZoneListEntry) closed_zones; + Qcow2ZoneListEntry *zone_list_entries; + uint32_t nr_zones_exp_open; + uint32_t nr_zones_imp_open; + uint32_t nr_zones_closed; } BDRVQcow2State; typedef struct Qcow2COWRegion { 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 next fields through header_length. allows subcluster-based allocation. See the Extended L2 Entries section for more details. - Bits 5-63: Reserved (set to 0) + Bit 5: Zoned extension bit. If this bit is set then + the file is an emulated zoned device. The + zoned extension must be present. + Implementations that do not support zoned + emulation cannot open this file because it + generally only make sense to interpret the + data along with the zone information and + write pointers. + + It is unsafe when any qcow2 user without + knowing the zoned extension reads or edits + a file with the zoned extension. The write + pointer tracking can be corrupted when a + writer edits a file, like overwriting beyond + the write pointer locations. Or a reader tries + to access a file without knowing write + pointers where the software setup will cause + invalid reads. + + Bits 6-63: Reserved (set to 0) 80 - 87: compatible_features Bitmask of compatible features. An implementation can @@ -XXX,XX +XXX,XX @@ be stored. Each extension has a structure like the following: 0x23852875 - Bitmaps extension 0x0537be77 - Full disk encryption header pointer 0x44415441 - External data file name string + 0x007a6264 - Zoned extension other - Unknown header extension, can be safely ignored @@ -XXX,XX +XXX,XX @@ The fields of the bitmaps extension are: Offset into the image file at which the bitmap directory starts. Must be aligned to a cluster boundary. +== Zoned extension == + +The zoned extension must be present if the incompatible bit is set, and +omitted when the incompatible bit is clear. It contains fields for +emulating the zoned storage model (https://zonedstorage.io/). When the +zone model mode is not host-managed, it is regarded as incompatible +and reports an error to users. + +The write pointers for each zone are stored in an area called zonedmeta +clusters. It is 8 bytes per zone. The offset and size of the zonedmeta +are kept in the zoned extension header. + +The fields of the zoned extension are: + Byte 0: zoned + The bit represents the zoned model of the device. 0 is for + a non-zoned device (all other information in this header + is ignored). 1 is for a host-managed device, which only + allows for sequential writes within each zone. Other + values may be added later, the implementation must refuse + to open a device containing an unknown zone model. + + 1 - 3: Reserved, must be zero. + + 4 - 7: zone_size + Total size of each zone, in bytes. It is less than 4GB + in the qcow2 image for simplicity. The maximum zone size + of real zoned devices are 2TB. If there are usages for + emulating devices whose zone sizes are larger than 4G, + the field needs to be sized bigger then. + + The value must be power of 2. Linux currently requires + the zone size to be a power of 2 number of LBAs. Qcow2 + following this is mainly to allow emulating a real + ZNS drive configuration. It is not relevant to the cluster + size. + + 8 - 11: zone_capacity + The number of writable bytes within the zones. The bytes + between zone capacity and zone size are unusable: reads + will return 0s and writes will fail. + + A zone capacity is always smaller or equal to the zone + size. It is for emulating a real ZNS drive configuration, + which has the constraint of aligning to some hardware erase + block size. + + 12 - 15: conventional_zones + The number of conventional zones. The conventional zones + allow sequential writes and random writes. While the + sequential zones only allow sequential writes. + + 16 - 19: nr_zones + The number of zones. It is the sum of conventional zones + and sequential zones. + + 20 - 23: max_active_zones + The number of the zones that can be in the implicit open, + explicit open or closed state. The max active zones cannot + be larger than the max open zones. + + 24 - 27: max_open_zones + The maximal number of open (implicitly open or explicitly + open) zones. It cannot be larger than the number of SWR + zones of the device. + + If the limits of open zones or active zones are equal to + the total number of SWR zones, then it's the same as having + no limits therefore max open zones and max active zones are + set to 0. + + 28 - 31: max_append_bytes + The number of bytes of a zone append request that can be + issued to the device. It must be 512-byte aligned and less + than the zone capacity. + + 32 - 39: zonedmeta_size + The size of zoned metadata in bytes. It contains no more + than 4GB. The zoned metadata structure is the write + pointers for each zone whose size is the number of zones + multiplied by the zone size. + + 40 - 47: zonedmeta_offset + The offset of zoned metadata structure in the contained + image, in bytes. + == Full disk encryption header pointer == The full disk encryption header must be present if, and only if, the diff --git a/include/block/block_int-common.h b/include/block/block_int-common.h index XXXXXXX..XXXXXXX 100644 --- a/include/block/block_int-common.h +++ b/include/block/block_int-common.h @@ -XXX,XX +XXX,XX @@ #define BLOCK_OPT_DATA_FILE_RAW "data_file_raw" #define BLOCK_OPT_COMPRESSION_TYPE "compression_type" #define BLOCK_OPT_EXTL2 "extended_l2" +#define BLOCK_OPT_ZONE_MODEL "zone.mode" +#define BLOCK_OPT_ZONE_SIZE "zone.size" +#define BLOCK_OPT_ZONE_CAPACITY "zone.capacity" +#define BLOCK_OPT_CONVENTIONAL_ZONES "zone.conventional_zones" +#define BLOCK_OPT_MAX_APPEND_BYTES "zone.max_append_bytes" +#define BLOCK_OPT_MAX_ACTIVE_ZONES "zone.max_active_zones" +#define BLOCK_OPT_MAX_OPEN_ZONES "zone.max_open_zones" #define BLOCK_PROBE_BUF_SIZE 512 @@ -XXX,XX +XXX,XX @@ typedef struct BlockLimits { /* zone size expressed in bytes */ uint32_t zone_size; + /* + * the number of usable logical blocks within the zone, expressed + * in bytes. A zone capacity is smaller or equal to the zone size. + */ + uint32_t zone_capacity; + /* total number of zones */ uint32_t nr_zones; 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 @@ { 'enum': 'Qcow2CompressionType', 'data': [ 'zlib', { 'name': 'zstd', 'if': 'CONFIG_ZSTD' } ] } +## +# @Qcow2ZoneModel: +# +# Zoned device model used in qcow2 image file +# +# @host-managed: The host-managed model only allows sequential write over the +# device zones. +# +# Since 8.2 +## +{ 'enum': 'Qcow2ZoneModel', + 'data': [ 'host-managed'] } + +## +# @Qcow2ZoneHostManaged: +# +# The host-managed zone model. It only allows sequential writes. +# +# @size: Total number of bytes within zones. +# +# @capacity: The number of usable logical blocks within zones +# in bytes. A zone capacity is always smaller or equal to the +# zone size. +# +# @conventional-zones: The number of conventional zones of the +# zoned device (default 0). +# +# @max-open-zones: The maximal number of open zones. It is less than +# or equal to the number of sequential write required zones of +# the device (default 0). +# +# @max-active-zones: The maximal number of zones in the implicit +# open, explicit open or closed state. It is less than or equal +# to the max open zones (default 0). +# +# @max-append-bytes: The maximal number of bytes of a zone +# append request that can be issued to the device. It must be +# 512-byte aligned and less than the zone capacity. +# +# Since 8.2 +## +{ 'struct': 'Qcow2ZoneHostManaged', + 'data': { '*size': 'size', + '*capacity': 'size', + '*conventional-zones': 'uint32', + '*max-open-zones': 'uint32', + '*max-active-zones': 'uint32', + '*max-append-bytes': 'size' } } + +## +# @Qcow2ZoneCreateOptions: +# +# The zone device model for the qcow2 image. +# +# Since 8.2 +## +{ 'union': 'Qcow2ZoneCreateOptions', + 'base': { 'mode': 'Qcow2ZoneModel' }, + 'discriminator': 'mode', + 'data': { 'host-managed': 'Qcow2ZoneHostManaged' } } + ## # @BlockdevCreateOptionsQcow2: # @@ -XXX,XX +XXX,XX @@ # @compression-type: The image cluster compression method # (default: zlib, since 5.1) # +# @zone: The zone device model modes. The default is that the device is +# not zoned. (since 8.2) +# # Since: 2.12 ## { 'struct': 'BlockdevCreateOptionsQcow2', @@ -XXX,XX +XXX,XX @@ '*preallocation': 'PreallocMode', '*lazy-refcounts': 'bool', '*refcount-bits': 'int', - '*compression-type':'Qcow2CompressionType' } } + '*compression-type':'Qcow2CompressionType', + '*zone': 'Qcow2ZoneCreateOptions' } } ## # @BlockdevCreateOptionsQed: -- 2.40.1
By adding zone operations and zoned metadata, the zoned emulation capability enables full emulation support of zoned device using a qcow2 file. The zoned device metadata includes zone type, zoned device state and write pointer of each zone, which is stored to an array of unsigned integers. Each zone of a zoned device makes state transitions following the zone state machine. The zone state machine mainly describes five states, IMPLICIT OPEN, EXPLICIT OPEN, FULL, EMPTY and CLOSED. READ ONLY and OFFLINE states will generally be affected by device internal events. The operations on zones cause corresponding state changing. Zoned devices have a limit on zone resources, which puts constraints on write operations into zones. It is managed by active zone lists following LRU policy. Signed-off-by: Sam Li <faithilikerun@gmail.com> --- block/qcow2.c | 791 ++++++++++++++++++++++++++++++++++++++++++- block/trace-events | 2 + include/qemu/queue.h | 1 + 3 files changed, 792 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 @@ qcow2_extract_crypto_opts(QemuOpts *opts, const char *fmt, Error **errp) return cryptoopts_qdict; } +#define QCOW2_ZT_IS_CONV(wp) (wp & 1ULL << 59) + +/* + * To emulate a real zoned device, closed, empty and full states are + * preserved after a power cycle. The open states are in-memory and will + * be lost after closing the device. Read-only and offline states are + * device-internal events, which are not considered for simplicity. + */ +static inline BlockZoneState qcow2_get_zone_state(BlockDriverState *bs, + uint32_t index) +{ + BDRVQcow2State *s = bs->opaque; + Qcow2ZoneListEntry *zone_entry = &s->zone_list_entries[index]; + uint64_t zone_wp = bs->wps->wp[index]; + uint64_t zone_start; + + if (QCOW2_ZT_IS_CONV(zone_wp)) { + return BLK_ZS_NOT_WP; + } + + if (QLIST_IS_INSERTED(zone_entry, exp_open_zone_entry)) { + return BLK_ZS_EOPEN; + } + if (QLIST_IS_INSERTED(zone_entry, imp_open_zone_entry)) { + return BLK_ZS_IOPEN; + } + + zone_start = index * bs->bl.zone_size; + if (zone_wp == zone_start) { + return BLK_ZS_EMPTY; + } + if (zone_wp >= zone_start + bs->bl.zone_capacity) { + return BLK_ZS_FULL; + } + if (zone_wp > zone_start) { + if (!QLIST_IS_INSERTED(zone_entry, closed_zone_entry)) { + /* + * The number of closed zones is not always updated in time when + * the device is closed. However, it only matters when doing + * zone report. Refresh the count and list of closed zones to + * provide correct zone states for zone report. + */ + QLIST_INSERT_HEAD(&s->closed_zones, zone_entry, closed_zone_entry); + s->nr_zones_closed++; + } + return BLK_ZS_CLOSED; + } + return BLK_ZS_NOT_WP; +} + +static void qcow2_rm_exp_open_zone(BDRVQcow2State *s, + uint32_t index) +{ + Qcow2ZoneListEntry *zone_entry = &s->zone_list_entries[index]; + + QLIST_REMOVE(zone_entry, exp_open_zone_entry); + s->nr_zones_exp_open--; +} + +static void qcow2_rm_imp_open_zone(BDRVQcow2State *s, + int32_t index) +{ + Qcow2ZoneListEntry *zone_entry; + if (index < 0) { + /* Apply LRU when the index is not specified. */ + zone_entry = QLIST_LAST(&s->imp_open_zones, imp_open_zone_entry); + } else { + zone_entry = &s->zone_list_entries[index]; + } + + QLIST_REMOVE(zone_entry, imp_open_zone_entry); + s->nr_zones_imp_open--; +} + +static void qcow2_rm_open_zone(BDRVQcow2State *s, + uint32_t index) +{ + Qcow2ZoneListEntry *zone_entry = &s->zone_list_entries[index]; + + if (QLIST_IS_INSERTED(zone_entry, exp_open_zone_entry)) { + qcow2_rm_exp_open_zone(s, index); + } else if (QLIST_IS_INSERTED(zone_entry, imp_open_zone_entry)) { + qcow2_rm_imp_open_zone(s, index); + } +} + +static void qcow2_rm_closed_zone(BDRVQcow2State *s, + uint32_t index) +{ + Qcow2ZoneListEntry *zone_entry = &s->zone_list_entries[index]; + + QLIST_REMOVE(zone_entry, closed_zone_entry); + s->nr_zones_closed--; +} + +static void qcow2_do_imp_open_zone(BDRVQcow2State *s, + uint32_t index, + BlockZoneState zs) +{ + Qcow2ZoneListEntry *zone_entry = &s->zone_list_entries[index]; + + switch (zs) { + case BLK_ZS_EMPTY: + break; + case BLK_ZS_CLOSED: + s->nr_zones_closed--; + break; + case BLK_ZS_IOPEN: + /* + * The LRU policy: update the zone that is most recently + * used to the head of the zone list + */ + if (zone_entry == QLIST_FIRST(&s->imp_open_zones)) { + return; + } + QLIST_REMOVE(zone_entry, imp_open_zone_entry); + s->nr_zones_imp_open--; + break; + default: + return; + } + + QLIST_INSERT_HEAD(&s->imp_open_zones, zone_entry, imp_open_zone_entry); + s->nr_zones_imp_open++; +} + +static void qcow2_do_exp_open_zone(BDRVQcow2State *s, + uint32_t index) +{ + Qcow2ZoneListEntry *zone_entry = &s->zone_list_entries[index]; + + QLIST_INSERT_HEAD(&s->exp_open_zones, zone_entry, exp_open_zone_entry); + s->nr_zones_exp_open++; +} + +/* + * The list of zones is managed using an LRU policy: the last + * zone of the list is always the one that was least recently used + * for writing and is chosen as the zone to close to be able to + * implicitly open another zone. + * + * We can only close the open zones. The index is not specified + * when it is less than 0. + */ +static void qcow2_do_close_zone(BlockDriverState *bs, + int32_t index, + BlockZoneState zs) +{ + BDRVQcow2State *s = bs->opaque; + Qcow2ZoneListEntry *zone_entry; + + if (index < 0 && zs == BLK_ZS_IOPEN) { + /* before removal of the last implicitly open zone */ + zone_entry = QLIST_LAST(&s->imp_open_zones, imp_open_zone_entry); + qcow2_rm_imp_open_zone(s, index); + goto close_zone; + } + + if (index >= 0 && zs == BLK_ZS_EOPEN) { + zone_entry = &s->zone_list_entries[index]; + qcow2_rm_exp_open_zone(s, index); + /* + * The zone state changes when the zone is removed from the list of + * open zones (explicitly open -> empty) + */ + qcow2_get_zone_state(bs, index); + } + return; + +close_zone: + QLIST_INSERT_HEAD(&s->closed_zones, zone_entry, closed_zone_entry); + s->nr_zones_closed++; +} + +/* + * Write the new wp value to the dedicated location of the image file. + */ +static int coroutine_fn GRAPH_RDLOCK +qcow2_write_wp_at(BlockDriverState *bs, uint64_t *wp, + int32_t index) { + BDRVQcow2State *s = bs->opaque; + uint64_t wpv = *wp; + int ret; + + ret = bdrv_pwrite(bs->file, s->zoned_header.zonedmeta_offset + + sizeof(uint64_t) * index, sizeof(uint64_t), wp, 0); + if (ret < 0) { + goto exit; + } + trace_qcow2_wp_tracking(index, *wp >> BDRV_SECTOR_BITS); + return ret; + +exit: + *wp = wpv; + error_report("Failed to write metadata with file"); + return ret; +} + +static bool qcow2_can_activate_zone(BlockDriverState *bs) +{ + BDRVQcow2State *s = bs->opaque; + + /* When the max active zone is zero, there is no limit on active zones */ + if (!s->zoned_header.max_active_zones) { + return true; + } + + /* Active zones are zones that are open or closed */ + return s->nr_zones_exp_open + s->nr_zones_imp_open + s->nr_zones_closed + < s->zoned_header.max_active_zones; +} + +/* + * This function manages open zones under active zones limit. It checks + * if a zone can transition to open state while maintaining max open and + * active zone limits. + */ +static bool qcow2_can_open_zone(BlockDriverState *bs) +{ + BDRVQcow2State *s = bs->opaque; + + /* When the max open zone is zero, there is no limit on open zones */ + if (!s->zoned_header.max_open_zones) { + return true; + } + + /* + * The open zones are zones with the states of explicitly and + * implicitly open. + */ + if (s->nr_zones_imp_open + s->nr_zones_exp_open < + s->zoned_header.max_open_zones) { + return true; + } + + /* + * Zones are managed one at a time. Thus, the number of implicitly open + * zone can never be over the open zone limit. When the active zone limit + * is not reached, close only one implicitly open zone. + */ + if (qcow2_can_activate_zone(bs)) { + qcow2_do_close_zone(bs, -1, BLK_ZS_IOPEN); + trace_qcow2_imp_open_zones(0x23, s->nr_zones_imp_open); + return true; + } + return false; +} + +static inline int coroutine_fn GRAPH_RDLOCK +qcow2_refresh_zonedmeta(BlockDriverState *bs) +{ + int ret; + BDRVQcow2State *s = bs->opaque; + uint64_t wps_size = s->zoned_header.zonedmeta_size; + g_autofree uint64_t *temp; + + temp = g_new(uint64_t, wps_size); + ret = bdrv_pread(bs->file, s->zoned_header.zonedmeta_offset, + wps_size, temp, 0); + if (ret < 0) { + error_report("Can not read metadata"); + return ret; + } + + memcpy(bs->wps->wp, temp, wps_size); + return 0; +} + /* * Passing by the zoned device configurations by a zoned_header struct, check * if the zone device options are under constraints. Return false when some @@ -XXX,XX +XXX,XX @@ qcow2_read_extensions(BlockDriverState *bs, uint64_t start_offset, be32_to_cpu(zoned_ext.max_active_zones); zoned_ext.max_append_bytes = be32_to_cpu(zoned_ext.max_append_bytes); + zoned_ext.zonedmeta_offset = + be64_to_cpu(zoned_ext.zonedmeta_offset); + zoned_ext.zonedmeta_size = be64_to_cpu(zoned_ext.zonedmeta_size); s->zoned_header = zoned_ext; + bs->wps = g_malloc(sizeof(BlockZoneWps) + + s->zoned_header.zonedmeta_size); + ret = qcow2_refresh_zonedmeta(bs); + if (ret < 0) { + return ret; + } + + s->zone_list_entries = g_new0(Qcow2ZoneListEntry, + zoned_ext.nr_zones); + QLIST_INIT(&s->exp_open_zones); + QLIST_INIT(&s->imp_open_zones); + QLIST_INIT(&s->closed_zones); + qemu_co_mutex_init(&bs->wps->colock); /* refuse to open broken images */ if (zoned_ext.nr_zones != DIV_ROUND_UP(bs->total_sectors * @@ -XXX,XX +XXX,XX @@ qcow2_co_pwritev_part(BlockDriverState *bs, int64_t offset, int64_t bytes, uint64_t host_offset; QCowL2Meta *l2meta = NULL; AioTaskPool *aio = NULL; + int64_t start_offset, start_bytes; + BlockZoneState zs; + int64_t end_zone, end_offset; + uint64_t *wp; + int64_t zone_size = bs->bl.zone_size; + int64_t zone_capacity = bs->bl.zone_capacity; + int index; trace_qcow2_writev_start_req(qemu_coroutine_self(), offset, bytes); + start_offset = offset; + start_bytes = bytes; + end_offset = start_offset + start_bytes; + if (bs->bl.zoned == BLK_Z_HM) { + index = start_offset / zone_size; + wp = &bs->wps->wp[index]; + if (!QCOW2_ZT_IS_CONV(*wp)) { + /* The write offset must be equal to the zone write pointer */ + if (offset != *wp) { + return -EINVAL; + } + + /* Only allow writes when there are zone resources left */ + zs = qcow2_get_zone_state(bs, index); + if (zs == BLK_ZS_CLOSED || zs == BLK_ZS_EMPTY) { + if (!qcow2_can_open_zone(bs)) { + return -EINVAL; + } + } + + /* + * Align up (start_offset, zone_size), the start offset is not + * necessarily power of two. + */ + end_zone = index * zone_size + zone_capacity; + /* Write cannot exceed the zone capacity. */ + if (end_offset > end_zone) { + return -EINVAL; + } + + /* + * Real drives change states before it can write to the zone. If + * the write fails, the zone state may have changed. + * + * The zone state transitions to implicit open when the original + * state is empty or closed. When the wp reaches the end, the + * open states (explicit open, implicit open) become full. + */ + zs = qcow2_get_zone_state(bs, index); + if (!(end_offset & (zone_capacity - 1))) { + /* Being aligned to zone capacity implies full state */ + qcow2_rm_open_zone(s, index); + trace_qcow2_imp_open_zones(0x24, + s->nr_zones_imp_open); + } else { + qcow2_do_imp_open_zone(s, index, zs); + trace_qcow2_imp_open_zones(0x24, + s->nr_zones_imp_open); + } + } + } + while (bytes != 0 && aio_task_pool_status(aio) == 0) { l2meta = NULL; @@ -XXX,XX +XXX,XX @@ qcow2_co_pwritev_part(BlockDriverState *bs, int64_t offset, int64_t bytes, qiov_offset += cur_bytes; trace_qcow2_writev_done_part(qemu_coroutine_self(), cur_bytes); } + + if (bs->bl.zoned == BLK_Z_HM) { + index = start_offset / zone_size; + wp = &bs->wps->wp[index]; + if (!QCOW2_ZT_IS_CONV(*wp)) { + /* Advance the write pointer when the write completes */ + *wp = end_offset; + ret = qcow2_write_wp_at(bs, wp, index); + if (ret < 0) { + goto fail_nometa; + } + } + } ret = 0; qemu_co_mutex_lock(&s->lock); @@ -XXX,XX +XXX,XX @@ static int GRAPH_RDLOCK qcow2_inactivate(BlockDriverState *bs) return result; } +static void qcow2_do_close_all_zone(BDRVQcow2State *s) +{ + Qcow2ZoneListEntry *zone_entry, *next; + + QLIST_FOREACH_SAFE(zone_entry, &s->imp_open_zones, imp_open_zone_entry, + next) { + QLIST_REMOVE(zone_entry, imp_open_zone_entry); + s->nr_zones_imp_open--; + } + + QLIST_FOREACH_SAFE(zone_entry, &s->exp_open_zones, exp_open_zone_entry, + next) { + QLIST_REMOVE(zone_entry, exp_open_zone_entry); + s->nr_zones_exp_open--; + } + + assert(s->nr_zones_imp_open + s->nr_zones_exp_open == 0); +} + static void coroutine_mixed_fn GRAPH_RDLOCK qcow2_do_close(BlockDriverState *bs, bool close_data_file) { @@ -XXX,XX +XXX,XX @@ qcow2_do_close(BlockDriverState *bs, bool close_data_file) qcow2_refcount_close(bs); qcow2_free_snapshots(bs); + qcow2_do_close_all_zone(s); + g_free(bs->wps); } static void GRAPH_UNLOCKED qcow2_close(BlockDriverState *bs) @@ -XXX,XX +XXX,XX @@ int qcow2_update_header(BlockDriverState *bs) .max_active_zones = cpu_to_be32(s->zoned_header.max_active_zones), .max_append_bytes = - cpu_to_be32(s->zoned_header.max_append_bytes) + cpu_to_be32(s->zoned_header.max_append_bytes), + .zonedmeta_offset = + cpu_to_be64(s->zoned_header.zonedmeta_offset), + .zonedmeta_size = cpu_to_be64(s->zoned_header.zonedmeta_size), }; ret = header_ext_add(buf, QCOW2_EXT_MAGIC_ZONED_FORMAT, &zoned_header, sizeof(zoned_header), @@ -XXX,XX +XXX,XX @@ qcow2_co_create(BlockdevCreateOptions *create_options, Error **errp) int version; int refcount_order; uint64_t *refcount_table; - int ret; + uint64_t zoned_meta_size, zoned_clusterlen; + int ret, offset, i; uint8_t compression_type = QCOW2_COMPRESSION_TYPE_ZLIB; assert(create_options->driver == BLOCKDEV_DRIVER_QCOW2); @@ -XXX,XX +XXX,XX @@ qcow2_co_create(BlockdevCreateOptions *create_options, Error **errp) ret = -EINVAL; goto unlock; } + + uint32_t nrz = s->zoned_header.nr_zones; + zoned_meta_size = sizeof(uint64_t) * nrz; + g_autofree uint64_t *meta = NULL; + meta = g_new0(uint64_t, nrz); + + for (i = 0; i < s->zoned_header.conventional_zones; ++i) { + meta[i] = i * s->zoned_header.zone_size; + meta[i] |= 1ULL << 59; + } + + for (; i < nrz; ++i) { + meta[i] = i * s->zoned_header.zone_size; + } + + offset = qcow2_alloc_clusters(blk_bs(blk), zoned_meta_size); + if (offset < 0) { + error_setg_errno(errp, -offset, "Could not allocate clusters " + "for zoned metadata size"); + goto unlock; + } + s->zoned_header.zonedmeta_offset = offset; + s->zoned_header.zonedmeta_size = zoned_meta_size; + + zoned_clusterlen = size_to_clusters(s, zoned_meta_size) + * s->cluster_size; + assert(qcow2_pre_write_overlap_check(bs, 0, offset, + zoned_clusterlen,false) == 0); + ret = bdrv_pwrite_zeroes(blk_bs(blk)->file, offset, + zoned_clusterlen, 0); + if (ret < 0) { + error_setg_errno(errp, -ret, "Could not zero fill zoned metadata"); + goto unlock; + } + ret = bdrv_pwrite(blk_bs(blk)->file, offset, zoned_meta_size, meta, 0); + if (ret < 0) { + error_setg_errno(errp, -ret, "Could not write zoned metadata " + "to disk"); + goto unlock; + } } else { s->zoned_header.zoned = BLK_Z_NONE; } @@ -XXX,XX +XXX,XX @@ qcow2_co_pdiscard(BlockDriverState *bs, int64_t offset, int64_t bytes) return ret; } +static int coroutine_fn +qcow2_co_zone_report(BlockDriverState *bs, int64_t offset, + unsigned int *nr_zones, BlockZoneDescriptor *zones) +{ + BDRVQcow2State *s = bs->opaque; + uint64_t zone_size = s->zoned_header.zone_size; + int64_t capacity = bs->total_sectors << BDRV_SECTOR_BITS; + int64_t size = bs->bl.nr_zones * zone_size; + unsigned int nrz; + int i = 0; + int si; + + if (offset >= capacity) { + error_report("offset %" PRId64 " is equal to or greater than the " + "device capacity %" PRId64 "", offset, capacity); + return -EINVAL; + } + + nrz = ((*nr_zones) < bs->bl.nr_zones) ? (*nr_zones) : bs->bl.nr_zones; + si = offset / zone_size; /* Zone size cannot be 0 for zoned device */ + qemu_co_mutex_lock(&bs->wps->colock); + for (; i < nrz; ++i) { + if (i + si >= bs->bl.nr_zones) { + break; + } + + zones[i].start = (si + i) * zone_size; + + /* The last zone can be smaller than the zone size */ + if ((si + i + 1) == bs->bl.nr_zones && size > capacity) { + uint32_t l = zone_size - (size - capacity); + zones[i].length = l; + zones[i].cap = l; + } else { + zones[i].length = zone_size; + zones[i].cap = zone_size; + } + + uint64_t wp = bs->wps->wp[si + i]; + if (QCOW2_ZT_IS_CONV(wp)) { + zones[i].type = BLK_ZT_CONV; + zones[i].state = BLK_ZS_NOT_WP; + /* Clear the zone type bit */ + wp &= ~(1ULL << 59); + } else { + zones[i].type = BLK_ZT_SWR; + zones[i].state = qcow2_get_zone_state(bs, si + i); + } + zones[i].wp = wp; + } + qemu_co_mutex_unlock(&bs->wps->colock); + *nr_zones = i; + return 0; +} + +static int coroutine_fn GRAPH_RDLOCK +qcow2_open_zone(BlockDriverState *bs, uint32_t index) { + BDRVQcow2State *s = bs->opaque; + int ret; + + qemu_co_mutex_lock(&bs->wps->colock); + BlockZoneState zs = qcow2_get_zone_state(bs, index); + trace_qcow2_imp_open_zones(BLK_ZO_OPEN, s->nr_zones_imp_open); + + switch(zs) { + case BLK_ZS_EMPTY: + if (!qcow2_can_activate_zone(bs)) { + ret = -EBUSY; + goto unlock; + } + break; + case BLK_ZS_IOPEN: + qcow2_rm_imp_open_zone(s, index); + break; + case BLK_ZS_EOPEN: + return 0; + case BLK_ZS_CLOSED: + if (!qcow2_can_open_zone(bs)) { + ret = -EINVAL; + goto unlock; + } + s->nr_zones_closed--; + break; + case BLK_ZS_FULL: + break; + default: + ret = -EINVAL; + goto unlock; + } + + qcow2_do_exp_open_zone(s, index); + ret = 0; + +unlock: + qemu_co_mutex_unlock(&bs->wps->colock); + return ret; +} + +static int qcow2_close_zone(BlockDriverState *bs, uint32_t index) { + int ret; + + qemu_co_mutex_lock(&bs->wps->colock); + BlockZoneState zs = qcow2_get_zone_state(bs, index); + + switch(zs) { + case BLK_ZS_EMPTY: + break; + case BLK_ZS_IOPEN: + break; + case BLK_ZS_EOPEN: + break; + case BLK_ZS_CLOSED: + /* Closing a closed zone is not an error */ + ret = 0; + goto unlock; + case BLK_ZS_FULL: + break; + default: + ret = -EINVAL; + goto unlock; + } + qcow2_do_close_zone(bs, index, zs); + ret = 0; + +unlock: + qemu_co_mutex_unlock(&bs->wps->colock); + return ret; +} + +static int coroutine_fn GRAPH_RDLOCK +qcow2_finish_zone(BlockDriverState *bs, uint32_t index) { + BDRVQcow2State *s = bs->opaque; + int ret; + + qemu_co_mutex_lock(&bs->wps->colock); + uint64_t *wp = &bs->wps->wp[index]; + BlockZoneState zs = qcow2_get_zone_state(bs, index); + + switch(zs) { + case BLK_ZS_EMPTY: + if (!qcow2_can_activate_zone(bs)) { + ret = -EBUSY; + goto unlock; + } + break; + case BLK_ZS_IOPEN: + qcow2_rm_imp_open_zone(s, index); + trace_qcow2_imp_open_zones(BLK_ZO_FINISH, s->nr_zones_imp_open); + break; + case BLK_ZS_EOPEN: + qcow2_rm_exp_open_zone(s, index); + break; + case BLK_ZS_CLOSED: + if (!qcow2_can_open_zone(bs)) { + ret = -EINVAL; + goto unlock; + } + qcow2_rm_closed_zone(s, index); + break; + case BLK_ZS_FULL: + ret = 0; + goto unlock; + default: + ret = -EINVAL; + goto unlock; + } + + *wp = ((uint64_t)index + 1) * s->zoned_header.zone_size; + ret = qcow2_write_wp_at(bs, wp, index); + +unlock: + qemu_co_mutex_unlock(&bs->wps->colock); + return ret; +} + +static int coroutine_fn GRAPH_RDLOCK +qcow2_reset_zone(BlockDriverState *bs, uint32_t index, + int64_t len) { + BDRVQcow2State *s = bs->opaque; + int nrz = bs->bl.nr_zones; + int zone_size = bs->bl.zone_size; + int n, ret = 0; + + qemu_co_mutex_lock(&bs->wps->colock); + uint64_t *wp = &bs->wps->wp[index]; + if (len == bs->total_sectors << BDRV_SECTOR_BITS) { + n = nrz; + index = 0; + } else { + n = len / zone_size; + } + + for (int i = 0; i < n; ++i) { + uint64_t *wp_i = (uint64_t *)(wp + i); + uint64_t wpi_v = *wp_i; + if (QCOW2_ZT_IS_CONV(wpi_v)) { + continue; + } + + BlockZoneState zs = qcow2_get_zone_state(bs, index + i); + switch (zs) { + case BLK_ZS_EMPTY: + break; + case BLK_ZS_IOPEN: + qcow2_rm_imp_open_zone(s, index + i); + trace_qcow2_imp_open_zones(BLK_ZO_RESET, s->nr_zones_imp_open); + break; + case BLK_ZS_EOPEN: + qcow2_rm_exp_open_zone(s, index + i); + break; + case BLK_ZS_CLOSED: + qcow2_rm_closed_zone(s, index + i); + break; + case BLK_ZS_FULL: + break; + default: + ret = -EINVAL; + goto unlock; + } + + if (zs == BLK_ZS_EMPTY) { + continue; + } + + *wp_i = ((uint64_t)index + i) * zone_size; + ret = qcow2_write_wp_at(bs, wp_i, index + i); + if (ret < 0) { + goto unlock; + } + /* clear data */ + ret = qcow2_co_pwrite_zeroes(bs, *wp_i, zone_size, 0); + if (ret < 0) { + error_report("Failed to reset zone at 0x%" PRIx64 "", *wp_i); + } + } + +unlock: + qemu_co_mutex_unlock(&bs->wps->colock); + return ret; +} + +static int coroutine_fn GRAPH_RDLOCK +qcow2_co_zone_mgmt(BlockDriverState *bs, BlockZoneOp op, + int64_t offset, int64_t len) +{ + BDRVQcow2State *s = bs->opaque; + int ret = 0; + int64_t capacity = bs->total_sectors << BDRV_SECTOR_BITS; + int64_t zone_size = s->zoned_header.zone_size; + int64_t zone_size_mask = zone_size - 1; + uint32_t index = offset / zone_size; + BlockZoneWps *wps = bs->wps; + + if (offset >= capacity) { + error_report("offset %" PRId64 " is equal to or greater than the" + "device capacity %" PRId64 "", offset, capacity); + return -EINVAL; + } + + if (offset & zone_size_mask) { + error_report("sector offset %" PRId64 " is not aligned to zone size" + " %" PRId64 "", offset / 512, zone_size / 512); + return -EINVAL; + } + + if (((offset + len) < capacity && len & zone_size_mask) || + offset + len > capacity) { + error_report("number of sectors %" PRId64 " is not aligned to zone" + " size %" PRId64 "", len / 512, zone_size / 512); + return -EINVAL; + } + + qemu_co_mutex_lock(&wps->colock); + uint64_t wpv = wps->wp[index]; + if (QCOW2_ZT_IS_CONV(wpv) && len != capacity) { + error_report("zone mgmt operations are not allowed for " + "conventional zones"); + ret = -EIO; + goto unlock; + } + qemu_co_mutex_unlock(&wps->colock); + + switch(op) { + case BLK_ZO_OPEN: + ret = qcow2_open_zone(bs, index); + break; + case BLK_ZO_CLOSE: + ret = qcow2_close_zone(bs, index); + break; + case BLK_ZO_FINISH: + ret = qcow2_finish_zone(bs, index); + break; + case BLK_ZO_RESET: + ret = qcow2_reset_zone(bs, index, len); + break; + default: + error_report("Unsupported zone op: 0x%x", op); + ret = -ENOTSUP; + break; + } + return ret; + +unlock: + qemu_co_mutex_unlock(&wps->colock); + return ret; +} + +static int coroutine_fn GRAPH_RDLOCK +qcow2_co_zone_append(BlockDriverState *bs, int64_t *offset, QEMUIOVector *qiov, + BdrvRequestFlags flags) +{ + assert(flags == 0); + int64_t capacity = bs->total_sectors << BDRV_SECTOR_BITS; + uint32_t index; + int ret; + int64_t zone_size_mask = bs->bl.zone_size - 1; + int64_t iov_len = 0; + int64_t len = 0; + + if (*offset >= capacity) { + error_report("*offset %" PRId64 " is equal to or greater than the" + "device capacity %" PRId64 "", *offset, capacity); + return -EINVAL; + } + + /* offset + len should not pass the end of that zone starting from offset */ + if (*offset & zone_size_mask) { + error_report("sector offset %" PRId64 " is not aligned to zone size " + "%" PRId32 "", *offset / 512, bs->bl.zone_size / 512); + return -EINVAL; + } + + int64_t wg = bs->bl.write_granularity; + int64_t wg_mask = wg - 1; + for (int i = 0; i < qiov->niov; i++) { + iov_len = qiov->iov[i].iov_len; + if (iov_len & wg_mask) { + error_report("len of IOVector[%d] %" PRId64 " is not aligned to " + "block size %" PRId64 "", i, iov_len, wg); + return -EINVAL; + } + } + len = qiov->size; + index = *offset / bs->bl.zone_size; + + if ((len >> BDRV_SECTOR_BITS) > bs->bl.max_append_sectors) { + return -ENOTSUP; + } + + qemu_co_mutex_lock(&bs->wps->colock); + uint64_t wp_i = bs->wps->wp[index]; + ret = qcow2_co_pwritev_part(bs, wp_i, len, qiov, 0, 0); + if (ret == 0) { + *offset = wp_i; + } else { + error_report("qcow2: zap failed"); + } + + qemu_co_mutex_unlock(&bs->wps->colock); + return ret; +} + static int coroutine_fn GRAPH_RDLOCK qcow2_co_copy_range_from(BlockDriverState *bs, BdrvChild *src, int64_t src_offset, @@ -XXX,XX +XXX,XX @@ BlockDriver bdrv_qcow2 = { .bdrv_co_pwritev_compressed_part = qcow2_co_pwritev_compressed_part, .bdrv_make_empty = qcow2_make_empty, + .bdrv_co_zone_report = qcow2_co_zone_report, + .bdrv_co_zone_mgmt = qcow2_co_zone_mgmt, + .bdrv_co_zone_append = qcow2_co_zone_append, + .bdrv_snapshot_create = qcow2_snapshot_create, .bdrv_snapshot_goto = qcow2_snapshot_goto, .bdrv_snapshot_delete = qcow2_snapshot_delete, diff --git a/block/trace-events b/block/trace-events index XXXXXXX..XXXXXXX 100644 --- a/block/trace-events +++ b/block/trace-events @@ -XXX,XX +XXX,XX @@ qcow2_writev_data(void *co, uint64_t offset) "co %p offset 0x%" PRIx64 qcow2_pwrite_zeroes_start_req(void *co, int64_t offset, int64_t bytes) "co %p offset 0x%" PRIx64 " bytes %" PRId64 qcow2_pwrite_zeroes(void *co, int64_t offset, int64_t bytes) "co %p offset 0x%" PRIx64 " bytes %" PRId64 qcow2_skip_cow(void *co, uint64_t offset, int nb_clusters) "co %p offset 0x%" PRIx64 " nb_clusters %d" +qcow2_wp_tracking(int index, uint64_t wp) "wps[%d]: 0x%" PRIx64 +qcow2_imp_open_zones(uint8_t op, int nrz) "nr_imp_open_zones after op 0x%x: %d" # qcow2-cluster.c qcow2_alloc_clusters_offset(void *co, uint64_t offset, int bytes) "co %p offset 0x%" PRIx64 " bytes %d" diff --git a/include/qemu/queue.h b/include/qemu/queue.h index XXXXXXX..XXXXXXX 100644 --- a/include/qemu/queue.h +++ b/include/qemu/queue.h @@ -XXX,XX +XXX,XX @@ struct { \ #define QLIST_EMPTY(head) ((head)->lh_first == NULL) #define QLIST_FIRST(head) ((head)->lh_first) #define QLIST_NEXT(elm, field) ((elm)->field.le_next) +#define QLIST_LAST(head, field) (*(head)->lh_first->field.le_prev) /* -- 2.40.1
The zoned format feature can be tested by: $ tests/qemu-iotests/check -qcow2 zoned-qcow2 Signed-off-by: Sam Li <faithilikerun@gmail.com> Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com> --- tests/qemu-iotests/tests/zoned-qcow2 | 147 +++++++++++++++++++ tests/qemu-iotests/tests/zoned-qcow2.out | 172 +++++++++++++++++++++++ 2 files changed, 319 insertions(+) create mode 100755 tests/qemu-iotests/tests/zoned-qcow2 create mode 100644 tests/qemu-iotests/tests/zoned-qcow2.out diff --git a/tests/qemu-iotests/tests/zoned-qcow2 b/tests/qemu-iotests/tests/zoned-qcow2 new file mode 100755 index XXXXXXX..XXXXXXX --- /dev/null +++ b/tests/qemu-iotests/tests/zoned-qcow2 @@ -XXX,XX +XXX,XX @@ +#!/usr/bin/env bash +# +# Test zone management operations for qcow2 file. +# + +seq="$(basename $0)" +echo "QA output created by $seq" +status=1 # failure is the default! + +file_name="zbc.qcow2" +_cleanup() +{ + _cleanup_test_img + _rm_test_img "$file_name" +} +trap "_cleanup; exit \$status" 0 1 2 3 15 + +# get standard environment, filters and checks +. ../common.rc +. ../common.filter +. ../common.qemu + +# This test only runs on Linux hosts with qcow2 image files. +_supported_fmt qcow2 +_supported_proto file +_supported_os Linux + +echo +echo "=== Initial image setup ===" +echo + +$QEMU_IMG create -f qcow2 $file_name -o size=768M -o zone.size=64M -o \ +zone.capacity=64M -o zone.conventional_zones=0 -o zone.max_append_bytes=32M \ +-o zone.max_open_zones=6 -o zone.max_active_zones=8 -o zone.mode=host-managed + +IMG="--image-opts -n driver=qcow2,file.driver=file,file.filename=$file_name" +QEMU_IO_OPTIONS=$QEMU_IO_OPTIONS_NO_FMT + +echo +echo "=== Testing a qcow2 img with zoned format ===" +echo +echo "case 1: test zone operations one by one" + +echo "(1) report zones[0]:" +$QEMU_IO $IMG -c "zrp 0 1" +echo +echo "report zones[0~9]:" +$QEMU_IO $IMG -c "zrp 0 10" +echo +echo "report zones[-1]:" # zones[-1] dictates the last zone +$QEMU_IO $IMG -c "zrp 0x2C000000 2" # 0x2C000000 / 512 = 0x160000 +echo +echo +echo "(2) open zones[0], zones[1], zones[-1] then close, finish, reset:" +$QEMU_IO $IMG << EOF +zo 0 0x4000000 +zrp 0 1 +zo 0x4000000 0x4000000 +zrp 0x4000000 1 +zo 0x2C000000 0x4000000 +zrp 0x2C000000 2 +zc 0 0x4000000 +zrp 0 1 +zc 0x4000000 0x4000000 +zrp 0x4000000 1 +zc 0x2C000000 0x4000000 +zrp 0x2C000000 2 +zf 0 0x4000000 +zrp 0 1 +zf 64M 64M +zrp 0x4000000 2 +zf 0x2C000000 0x4000000 +zrp 0x2C000000 2 +zrs 0 0x4000000 +zrp 0 1 +zrs 0x4000000 0x4000000 +zrp 0x4000000 1 +zrs 0x2C000000 0x4000000 +zrp 0x2C000000 2 +EOF + +echo +echo "(3) append write with (4k, 8k) data" +$QEMU_IO $IMG -c "zrp 0 12" # the physical block size of the device is 4096 +echo "Append write zones[0], zones[1] twice" +$QEMU_IO $IMG << EOF +zap -p 0 0x1000 0x2000 +zrp 0 1 +zap -p 0 0x1000 0x2000 +zrp 0 1 +zap -p 0x4000000 0x1000 0x2000 +zrp 0x4000000 1 +zap -p 0x4000000 0x1000 0x2000 +zrp 0x4000000 1 +EOF + +echo +echo "Reset all:" +$QEMU_IO $IMG -c "zrp 0 12" -c "zrs 0 768M" -c "zrp 0 12" +echo +echo + +echo "case 2: test a sets of ops that works or not" +echo "(1) append write (4k, 4k) and then write to full" +$QEMU_IO $IMG << EOF +zap -p 0 0x1000 0x1000 +zrp 0 1 +zap -p 0 0x1000 0x3ffd000 +zrp 0 1 +EOF + +echo "Reset zones[0]:" +$QEMU_IO $IMG -c "zrs 0 64M" -c "zrp 0 1" + +echo "(2) write in zones[0], zones[3], zones[8], and then reset all" +$QEMU_IO $IMG << EOF +zap -p 0 0x1000 0x1000 +zap -p 0xc000000 0x1000 0x1000 +zap -p 0x20000000 0x1000 0x1000 +zrp 0 12 +zrs 0 768M +zrp 0 12 +EOF + +echo "case 3: test zone resource management" +echo "(1) write in zones[0], zones[1], zones[2] and then close it" +$QEMU_IO $IMG << EOF +zap -p 0 0x1000 0x1000 +zap -p 0x4000000 0x1000 0x1000 +zap -p 0x8000000 0x1000 0x1000 +zrp 0 12 +zc 0 64M +zc 0x4000000 64M +zc 0x8000000 64M +zrp 0 12 +EOF + +echo "(2) reset all after 3(1)" +$QEMU_IO $IMG << EOF +zrs 0 768M +zrp 0 12 +EOF + +# success, all done +echo "*** done" +rm -f $seq.full +status=0 diff --git a/tests/qemu-iotests/tests/zoned-qcow2.out b/tests/qemu-iotests/tests/zoned-qcow2.out new file mode 100644 index XXXXXXX..XXXXXXX --- /dev/null +++ b/tests/qemu-iotests/tests/zoned-qcow2.out @@ -XXX,XX +XXX,XX @@ +QA output created by zoned-qcow2 + +=== Initial image setup === + +Formatting 'zbc.qcow2', fmt=qcow2 cluster_size=65536 extended_l2=off compression_type=zlib zone.mode=host-managed zone.size=67108864 zone.capacity=67108864 zone.conventional_zones=0 zone.max_append_bytes=33554432 zone.max_active_zones=8 zone.max_open_zones=6 size=805306368 lazy_refcounts=off refcount_bits=16 + +=== Testing a qcow2 img with zoned format === + +case 1: test zone operations one by one +(1) report zones[0]: +start: 0x0, len 0x20000, cap 0x20000, wptr 0x0, zcond:1, [type: 2] + +report zones[0~9]: +start: 0x0, len 0x20000, cap 0x20000, wptr 0x0, zcond:1, [type: 2] +start: 0x20000, len 0x20000, cap 0x20000, wptr 0x20000, zcond:1, [type: 2] +start: 0x40000, len 0x20000, cap 0x20000, wptr 0x40000, zcond:1, [type: 2] +start: 0x60000, len 0x20000, cap 0x20000, wptr 0x60000, zcond:1, [type: 2] +start: 0x80000, len 0x20000, cap 0x20000, wptr 0x80000, zcond:1, [type: 2] +start: 0xa0000, len 0x20000, cap 0x20000, wptr 0xa0000, zcond:1, [type: 2] +start: 0xc0000, len 0x20000, cap 0x20000, wptr 0xc0000, zcond:1, [type: 2] +start: 0xe0000, len 0x20000, cap 0x20000, wptr 0xe0000, zcond:1, [type: 2] +start: 0x100000, len 0x20000, cap 0x20000, wptr 0x100000, zcond:1, [type: 2] +start: 0x120000, len 0x20000, cap 0x20000, wptr 0x120000, zcond:1, [type: 2] + +report zones[-1]: +start: 0x160000, len 0x20000, cap 0x20000, wptr 0x160000, zcond:1, [type: 2] + + +(2) open zones[0], zones[1], zones[-1] then close, finish, reset: +qemu-io> qemu-io> start: 0x0, len 0x20000, cap 0x20000, wptr 0x0, zcond:3, [type: 2] +qemu-io> qemu-io> start: 0x20000, len 0x20000, cap 0x20000, wptr 0x20000, zcond:3, [type: 2] +qemu-io> qemu-io> start: 0x160000, len 0x20000, cap 0x20000, wptr 0x160000, zcond:3, [type: 2] +qemu-io> qemu-io> start: 0x0, len 0x20000, cap 0x20000, wptr 0x0, zcond:1, [type: 2] +qemu-io> qemu-io> start: 0x20000, len 0x20000, cap 0x20000, wptr 0x20000, zcond:1, [type: 2] +qemu-io> qemu-io> start: 0x160000, len 0x20000, cap 0x20000, wptr 0x160000, zcond:1, [type: 2] +qemu-io> qemu-io> start: 0x0, len 0x20000, cap 0x20000, wptr 0x20000, zcond:14, [type: 2] +qemu-io> qemu-io> start: 0x20000, len 0x20000, cap 0x20000, wptr 0x40000, zcond:14, [type: 2] +start: 0x40000, len 0x20000, cap 0x20000, wptr 0x40000, zcond:1, [type: 2] +qemu-io> qemu-io> start: 0x160000, len 0x20000, cap 0x20000, wptr 0x180000, zcond:14, [type: 2] +qemu-io> qemu-io> start: 0x0, len 0x20000, cap 0x20000, wptr 0x0, zcond:1, [type: 2] +qemu-io> qemu-io> start: 0x20000, len 0x20000, cap 0x20000, wptr 0x20000, zcond:1, [type: 2] +qemu-io> qemu-io> start: 0x160000, len 0x20000, cap 0x20000, wptr 0x160000, zcond:1, [type: 2] +qemu-io> +(3) append write with (4k, 8k) data +start: 0x0, len 0x20000, cap 0x20000, wptr 0x0, zcond:1, [type: 2] +start: 0x20000, len 0x20000, cap 0x20000, wptr 0x20000, zcond:1, [type: 2] +start: 0x40000, len 0x20000, cap 0x20000, wptr 0x40000, zcond:1, [type: 2] +start: 0x60000, len 0x20000, cap 0x20000, wptr 0x60000, zcond:1, [type: 2] +start: 0x80000, len 0x20000, cap 0x20000, wptr 0x80000, zcond:1, [type: 2] +start: 0xa0000, len 0x20000, cap 0x20000, wptr 0xa0000, zcond:1, [type: 2] +start: 0xc0000, len 0x20000, cap 0x20000, wptr 0xc0000, zcond:1, [type: 2] +start: 0xe0000, len 0x20000, cap 0x20000, wptr 0xe0000, zcond:1, [type: 2] +start: 0x100000, len 0x20000, cap 0x20000, wptr 0x100000, zcond:1, [type: 2] +start: 0x120000, len 0x20000, cap 0x20000, wptr 0x120000, zcond:1, [type: 2] +start: 0x140000, len 0x20000, cap 0x20000, wptr 0x140000, zcond:1, [type: 2] +start: 0x160000, len 0x20000, cap 0x20000, wptr 0x160000, zcond:1, [type: 2] +Append write zones[0], zones[1] twice +qemu-io> After zap done, the append sector is 0x0 +qemu-io> start: 0x0, len 0x20000, cap 0x20000, wptr 0x18, zcond:2, [type: 2] +qemu-io> After zap done, the append sector is 0x18 +qemu-io> start: 0x0, len 0x20000, cap 0x20000, wptr 0x30, zcond:2, [type: 2] +qemu-io> After zap done, the append sector is 0x20000 +qemu-io> start: 0x20000, len 0x20000, cap 0x20000, wptr 0x20018, zcond:2, [type: 2] +qemu-io> After zap done, the append sector is 0x20018 +qemu-io> start: 0x20000, len 0x20000, cap 0x20000, wptr 0x20030, zcond:2, [type: 2] +qemu-io> +Reset all: +start: 0x0, len 0x20000, cap 0x20000, wptr 0x30, zcond:4, [type: 2] +start: 0x20000, len 0x20000, cap 0x20000, wptr 0x20030, zcond:4, [type: 2] +start: 0x40000, len 0x20000, cap 0x20000, wptr 0x40000, zcond:1, [type: 2] +start: 0x60000, len 0x20000, cap 0x20000, wptr 0x60000, zcond:1, [type: 2] +start: 0x80000, len 0x20000, cap 0x20000, wptr 0x80000, zcond:1, [type: 2] +start: 0xa0000, len 0x20000, cap 0x20000, wptr 0xa0000, zcond:1, [type: 2] +start: 0xc0000, len 0x20000, cap 0x20000, wptr 0xc0000, zcond:1, [type: 2] +start: 0xe0000, len 0x20000, cap 0x20000, wptr 0xe0000, zcond:1, [type: 2] +start: 0x100000, len 0x20000, cap 0x20000, wptr 0x100000, zcond:1, [type: 2] +start: 0x120000, len 0x20000, cap 0x20000, wptr 0x120000, zcond:1, [type: 2] +start: 0x140000, len 0x20000, cap 0x20000, wptr 0x140000, zcond:1, [type: 2] +start: 0x160000, len 0x20000, cap 0x20000, wptr 0x160000, zcond:1, [type: 2] +start: 0x0, len 0x20000, cap 0x20000, wptr 0x0, zcond:1, [type: 2] +start: 0x20000, len 0x20000, cap 0x20000, wptr 0x20000, zcond:1, [type: 2] +start: 0x40000, len 0x20000, cap 0x20000, wptr 0x40000, zcond:1, [type: 2] +start: 0x60000, len 0x20000, cap 0x20000, wptr 0x60000, zcond:1, [type: 2] +start: 0x80000, len 0x20000, cap 0x20000, wptr 0x80000, zcond:1, [type: 2] +start: 0xa0000, len 0x20000, cap 0x20000, wptr 0xa0000, zcond:1, [type: 2] +start: 0xc0000, len 0x20000, cap 0x20000, wptr 0xc0000, zcond:1, [type: 2] +start: 0xe0000, len 0x20000, cap 0x20000, wptr 0xe0000, zcond:1, [type: 2] +start: 0x100000, len 0x20000, cap 0x20000, wptr 0x100000, zcond:1, [type: 2] +start: 0x120000, len 0x20000, cap 0x20000, wptr 0x120000, zcond:1, [type: 2] +start: 0x140000, len 0x20000, cap 0x20000, wptr 0x140000, zcond:1, [type: 2] +start: 0x160000, len 0x20000, cap 0x20000, wptr 0x160000, zcond:1, [type: 2] + + +case 2: test a sets of ops that works or not +(1) append write (4k, 4k) and then write to full +qemu-io> After zap done, the append sector is 0x0 +qemu-io> start: 0x0, len 0x20000, cap 0x20000, wptr 0x10, zcond:2, [type: 2] +qemu-io> zone append failed: Operation not supported +qemu-io> start: 0x0, len 0x20000, cap 0x20000, wptr 0x10, zcond:2, [type: 2] +qemu-io> Reset zones[0]: +start: 0x0, len 0x20000, cap 0x20000, wptr 0x0, zcond:1, [type: 2] +(2) write in zones[0], zones[3], zones[8], and then reset all +qemu-io> After zap done, the append sector is 0x0 +qemu-io> After zap done, the append sector is 0x60000 +qemu-io> After zap done, the append sector is 0x100000 +qemu-io> start: 0x0, len 0x20000, cap 0x20000, wptr 0x10, zcond:2, [type: 2] +start: 0x20000, len 0x20000, cap 0x20000, wptr 0x20000, zcond:1, [type: 2] +start: 0x40000, len 0x20000, cap 0x20000, wptr 0x40000, zcond:1, [type: 2] +start: 0x60000, len 0x20000, cap 0x20000, wptr 0x60010, zcond:2, [type: 2] +start: 0x80000, len 0x20000, cap 0x20000, wptr 0x80000, zcond:1, [type: 2] +start: 0xa0000, len 0x20000, cap 0x20000, wptr 0xa0000, zcond:1, [type: 2] +start: 0xc0000, len 0x20000, cap 0x20000, wptr 0xc0000, zcond:1, [type: 2] +start: 0xe0000, len 0x20000, cap 0x20000, wptr 0xe0000, zcond:1, [type: 2] +start: 0x100000, len 0x20000, cap 0x20000, wptr 0x100010, zcond:2, [type: 2] +start: 0x120000, len 0x20000, cap 0x20000, wptr 0x120000, zcond:1, [type: 2] +start: 0x140000, len 0x20000, cap 0x20000, wptr 0x140000, zcond:1, [type: 2] +start: 0x160000, len 0x20000, cap 0x20000, wptr 0x160000, zcond:1, [type: 2] +qemu-io> qemu-io> start: 0x0, len 0x20000, cap 0x20000, wptr 0x0, zcond:1, [type: 2] +start: 0x20000, len 0x20000, cap 0x20000, wptr 0x20000, zcond:1, [type: 2] +start: 0x40000, len 0x20000, cap 0x20000, wptr 0x40000, zcond:1, [type: 2] +start: 0x60000, len 0x20000, cap 0x20000, wptr 0x60000, zcond:1, [type: 2] +start: 0x80000, len 0x20000, cap 0x20000, wptr 0x80000, zcond:1, [type: 2] +start: 0xa0000, len 0x20000, cap 0x20000, wptr 0xa0000, zcond:1, [type: 2] +start: 0xc0000, len 0x20000, cap 0x20000, wptr 0xc0000, zcond:1, [type: 2] +start: 0xe0000, len 0x20000, cap 0x20000, wptr 0xe0000, zcond:1, [type: 2] +start: 0x100000, len 0x20000, cap 0x20000, wptr 0x100000, zcond:1, [type: 2] +start: 0x120000, len 0x20000, cap 0x20000, wptr 0x120000, zcond:1, [type: 2] +start: 0x140000, len 0x20000, cap 0x20000, wptr 0x140000, zcond:1, [type: 2] +start: 0x160000, len 0x20000, cap 0x20000, wptr 0x160000, zcond:1, [type: 2] +qemu-io> case 3: test zone resource management +(1) write in zones[0], zones[1], zones[2] and then close it +qemu-io> After zap done, the append sector is 0x0 +qemu-io> After zap done, the append sector is 0x20000 +qemu-io> After zap done, the append sector is 0x40000 +qemu-io> start: 0x0, len 0x20000, cap 0x20000, wptr 0x10, zcond:2, [type: 2] +start: 0x20000, len 0x20000, cap 0x20000, wptr 0x20010, zcond:2, [type: 2] +start: 0x40000, len 0x20000, cap 0x20000, wptr 0x40010, zcond:2, [type: 2] +start: 0x60000, len 0x20000, cap 0x20000, wptr 0x60000, zcond:1, [type: 2] +start: 0x80000, len 0x20000, cap 0x20000, wptr 0x80000, zcond:1, [type: 2] +start: 0xa0000, len 0x20000, cap 0x20000, wptr 0xa0000, zcond:1, [type: 2] +start: 0xc0000, len 0x20000, cap 0x20000, wptr 0xc0000, zcond:1, [type: 2] +start: 0xe0000, len 0x20000, cap 0x20000, wptr 0xe0000, zcond:1, [type: 2] +start: 0x100000, len 0x20000, cap 0x20000, wptr 0x100000, zcond:1, [type: 2] +start: 0x120000, len 0x20000, cap 0x20000, wptr 0x120000, zcond:1, [type: 2] +start: 0x140000, len 0x20000, cap 0x20000, wptr 0x140000, zcond:1, [type: 2] +start: 0x160000, len 0x20000, cap 0x20000, wptr 0x160000, zcond:1, [type: 2] +qemu-io> qemu-io> qemu-io> qemu-io> start: 0x0, len 0x20000, cap 0x20000, wptr 0x10, zcond:2, [type: 2] +start: 0x20000, len 0x20000, cap 0x20000, wptr 0x20010, zcond:2, [type: 2] +start: 0x40000, len 0x20000, cap 0x20000, wptr 0x40010, zcond:2, [type: 2] +start: 0x60000, len 0x20000, cap 0x20000, wptr 0x60000, zcond:1, [type: 2] +start: 0x80000, len 0x20000, cap 0x20000, wptr 0x80000, zcond:1, [type: 2] +start: 0xa0000, len 0x20000, cap 0x20000, wptr 0xa0000, zcond:1, [type: 2] +start: 0xc0000, len 0x20000, cap 0x20000, wptr 0xc0000, zcond:1, [type: 2] +start: 0xe0000, len 0x20000, cap 0x20000, wptr 0xe0000, zcond:1, [type: 2] +start: 0x100000, len 0x20000, cap 0x20000, wptr 0x100000, zcond:1, [type: 2] +start: 0x120000, len 0x20000, cap 0x20000, wptr 0x120000, zcond:1, [type: 2] +start: 0x140000, len 0x20000, cap 0x20000, wptr 0x140000, zcond:1, [type: 2] +start: 0x160000, len 0x20000, cap 0x20000, wptr 0x160000, zcond:1, [type: 2] +qemu-io> (2) reset all after 3(1) +qemu-io> qemu-io> start: 0x0, len 0x20000, cap 0x20000, wptr 0x0, zcond:1, [type: 2] +start: 0x20000, len 0x20000, cap 0x20000, wptr 0x20000, zcond:1, [type: 2] +start: 0x40000, len 0x20000, cap 0x20000, wptr 0x40000, zcond:1, [type: 2] +start: 0x60000, len 0x20000, cap 0x20000, wptr 0x60000, zcond:1, [type: 2] +start: 0x80000, len 0x20000, cap 0x20000, wptr 0x80000, zcond:1, [type: 2] +start: 0xa0000, len 0x20000, cap 0x20000, wptr 0xa0000, zcond:1, [type: 2] +start: 0xc0000, len 0x20000, cap 0x20000, wptr 0xc0000, zcond:1, [type: 2] +start: 0xe0000, len 0x20000, cap 0x20000, wptr 0xe0000, zcond:1, [type: 2] +start: 0x100000, len 0x20000, cap 0x20000, wptr 0x100000, zcond:1, [type: 2] +start: 0x120000, len 0x20000, cap 0x20000, wptr 0x120000, zcond:1, [type: 2] +start: 0x140000, len 0x20000, cap 0x20000, wptr 0x140000, zcond:1, [type: 2] +start: 0x160000, len 0x20000, cap 0x20000, wptr 0x160000, zcond:1, [type: 2] +qemu-io> *** done -- 2.40.1