There are patches floating around to add NBD_CMD_BLOCK_STATUS,
but NBD wants to report status on byte granularity (even if the
reporting will probably be naturally aligned to sectors or even
much higher levels). I've therefore started the task of
converting our block status code to report at a byte granularity
rather than sectors.
The overall conversion currently looks like:
part 1: bdrv_is_allocated (merged, commit 51b0a488)
part 2: dirty-bitmap (v5 is posted [1], mostly reviewed)
part 3: bdrv_get_block_status (v3 is posted [2], mostly reviewed)
part 4: .bdrv_co_block_status (this series, second half of v1 [3])
Available as a tag at:
git fetch git://repo.or.cz/qemu/ericb.git nbd-byte-callback-v2
It depends on my dirty-bitmap patches [1], Manos' filter cleanups [4],
and my bdrv_get_block_status patches [2].
[1] https://lists.gnu.org/archive/html/qemu-devel/2017-07/msg03512.html
[2] https://lists.gnu.org/archive/html/qemu-devel/2017-07/msg03853.html
[3] https://lists.gnu.org/archive/html/qemu-devel/2017-04/msg02642.html
[4] https://lists.gnu.org/archive/html/qemu-devel/2017-07/msg03846.html
Since v1:
- rebase to master and changes in earlier series
- fix a couple of bugs
001/20:[0083] [FC] 'block: Add .bdrv_co_block_status() callback'
002/20:[down] 'block: Switch passthrough drivers to .bdrv_co_block_status()'
003/20:[0010] [FC] 'file-posix: Switch to .bdrv_co_block_status()'
004/20:[0017] [FC] 'gluster: Switch to .bdrv_co_block_status()'
005/20:[----] [--] 'iscsi: Switch cluster_sectors to byte-based'
006/20:[0016] [FC] 'iscsi: Switch iscsi_allocmap_update() to byte-based'
007/20:[0004] [FC] 'iscsi: Switch to .bdrv_co_block_status()'
008/20:[0001] [FC] 'null: Switch to .bdrv_co_block_status()'
009/20:[0006] [FC] 'parallels: Switch to .bdrv_co_block_status()'
010/20:[0005] [FC] 'qcow: Switch to .bdrv_co_block_status()'
011/20:[0006] [FC] 'qcow2: Switch to .bdrv_co_block_status()'
012/20:[0010] [FC] 'qed: Switch to .bdrv_co_block_status()'
013/20:[0001] [FC] 'raw: Switch to .bdrv_co_block_status()'
014/20:[0004] [FC] 'sheepdog: Switch to .bdrv_co_block_status()'
015/20:[----] [--] 'vdi: Avoid bitrot of debugging code'
016/20:[0005] [FC] 'vdi: Switch to .bdrv_co_block_status()'
017/20:[0005] [FC] 'vmdk: Switch to .bdrv_co_block_status()'
018/20:[0013] [FC] 'vpc: Switch to .bdrv_co_block_status()'
019/20:[0016] [FC] 'vvfat: Switch to .bdrv_co_block_status()'
020/20:[0068] [FC] 'block: Drop unused .bdrv_co_get_block_status()'
Eric Blake (20):
block: Add .bdrv_co_block_status() callback
block: Switch passthrough drivers to .bdrv_co_block_status()
file-posix: Switch to .bdrv_co_block_status()
gluster: Switch to .bdrv_co_block_status()
iscsi: Switch cluster_sectors to byte-based
iscsi: Switch iscsi_allocmap_update() to byte-based
iscsi: Switch to .bdrv_co_block_status()
null: Switch to .bdrv_co_block_status()
parallels: Switch to .bdrv_co_block_status()
qcow: Switch to .bdrv_co_block_status()
qcow2: Switch to .bdrv_co_block_status()
qed: Switch to .bdrv_co_block_status()
raw: Switch to .bdrv_co_block_status()
sheepdog: Switch to .bdrv_co_block_status()
vdi: Avoid bitrot of debugging code
vdi: Switch to .bdrv_co_block_status()
vmdk: Switch to .bdrv_co_block_status()
vpc: Switch to .bdrv_co_block_status()
vvfat: Switch to .bdrv_co_block_status()
block: Drop unused .bdrv_co_get_block_status()
include/block/block_int.h | 38 ++++++------
block/io.c | 60 ++++++++++---------
block/blkdebug.c | 19 +++---
block/commit.c | 2 +-
block/file-posix.c | 57 ++++++++++--------
block/gluster.c | 62 +++++++++++---------
block/iscsi.c | 146 +++++++++++++++++++++++++---------------------
block/mirror.c | 2 +-
block/null.c | 22 +++----
block/parallels.c | 19 ++++--
block/qcow.c | 25 ++++----
block/qcow2.c | 21 ++++---
block/qed.c | 22 +++----
block/raw-format.c | 17 +++---
block/sheepdog.c | 23 ++++----
block/vdi.c | 40 ++++++-------
block/vmdk.c | 27 +++++----
block/vpc.c | 40 ++++++-------
block/vvfat.c | 16 +++--
19 files changed, 349 insertions(+), 309 deletions(-)
--
2.9.4