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.
These patches have been around for a while, but it's time to finish it now that 2.12 is open for patches. Based-on: <20180213170529.10858-1-kw...@redhat.com> (Kevin's [PULL 00/55] Block layer patches) The overall conversion currently looks like: part 1: bdrv_is_allocated (merged, commit 51b0a488, 2.10) part 2: dirty-bitmap (merged, commit ca759622, 2.11) part 3: bdrv_get_block_status (merged, commit f0a9c18f, 2.11) part 4: .bdrv_co_block_status (this series, v7 was here [1]) [1] https://lists.gnu.org/archive/html/qemu-devel/2018-01/msg00954.html Available as a tag at: git fetch git://repo.or.cz/qemu/ericb.git nbd-byte-callback-v8 Since v7: - rebase to master (more iscsi context changes, nvme driver is new) - add a few more R-bys Eric Blake (21): block: Add .bdrv_co_block_status() callback nvme: Drop pointless .bdrv_co_get_block_status() 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.h | 14 ++--- include/block/block_int.h | 51 +++++++++------ block/io.c | 86 +++++++++++-------------- block/blkdebug.c | 20 +++--- block/commit.c | 2 +- block/file-posix.c | 62 +++++++++--------- block/gluster.c | 70 ++++++++++----------- block/iscsi.c | 157 ++++++++++++++++++++++++---------------------- block/mirror.c | 2 +- block/null.c | 23 +++---- block/nvme.c | 14 ----- block/parallels.c | 22 ++++--- block/qcow.c | 27 ++++---- block/qcow2.c | 24 +++---- block/qed.c | 84 +++++++++---------------- block/raw-format.c | 16 ++--- block/sheepdog.c | 26 ++++---- block/throttle.c | 2 +- block/vdi.c | 45 +++++++------ block/vmdk.c | 38 +++++------ block/vpc.c | 45 ++++++------- block/vvfat.c | 16 +++-- 22 files changed, 404 insertions(+), 442 deletions(-) -- 2.14.3
