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xemu/block
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Anton Nefedov 18a59f03c3 block: fix write with zero flag set and iovector provided 
The normal bdrv_co_pwritev() use is either
  - BDRV_REQ_ZERO_WRITE clear and iovector provided
  - BDRV_REQ_ZERO_WRITE set and iovector == NULL

while
  - the flag clear and iovector == NULL is an assertion failure
    in bdrv_co_do_zero_pwritev()
  - the flag set and iovector provided is in fact allowed
    (the flag prevails and zeroes are written)

However the alignment logic does not support the latter case so the padding
areas get overwritten with zeroes.

Currently, general functions like bdrv_rw_co() do provide iovector
regardless of flags. So, keep it supported and use bdrv_co_do_zero_pwritev()
alignment for it which also makes the code a bit more obvious anyway.

Signed-off-by: Anton Nefedov <anton.nefedov@virtuozzo.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Reviewed-by: Alberto Garcia <berto@igalia.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2018-03-02 18:39:07 +01:00
..
accounting.c block: make accounting thread-safe 2017-06-16 07:55:00 +08:00
backup.c backup: use copy_bitmap in incremental backup 2017-12-18 10:54:13 -05:00
blkdebug.c block: Switch passthrough drivers to .bdrv_co_block_status() 2018-03-02 18:39:07 +01:00
blkreplay.c block: change variable names in BlockDriverState 2017-06-26 14:54:46 +02:00
blkverify.c Move include qemu/option.h from qemu-common.h to actual users 2018-02-09 13:52:16 +01:00
block-backend.c Move include qemu/option.h from qemu-common.h to actual users 2018-02-09 13:52:16 +01:00
bochs.c block: Deprecate bdrv_set_read_only() and users 2017-11-17 13:35:59 +01:00
cloop.c block: Deprecate bdrv_set_read_only() and users 2017-11-17 13:35:59 +01:00
commit.c block: Switch passthrough drivers to .bdrv_co_block_status() 2018-03-02 18:39:07 +01:00
crypto.c block: Simplify bdrv_can_write_zeroes_with_unmap() 2018-02-09 12:32:44 -06:00
crypto.h qcow: convert QCow to use QCryptoBlock for encryption 2017-07-11 17:44:56 +02:00
curl.c Move include qemu/option.h from qemu-common.h to actual users 2018-02-09 13:52:16 +01:00
dirty-bitmap.c block: maintain persistent disabled bitmaps 2018-02-13 16:59:58 +01:00
dmg-bz2.c dmg: Move libbz2 code to dmg-bz2.so 2016-10-07 14:14:06 +02:00
dmg.c block: Deprecate bdrv_set_read_only() and users 2017-11-17 13:35:59 +01:00
dmg.h block: remove "qemu/osdep.h" from header file 2017-12-18 17:07:02 +03:00
file-posix.c file-posix: Switch to .bdrv_co_block_status() 2018-03-02 18:39:07 +01:00
file-win32.c Move include qemu/option.h from qemu-common.h to actual users 2018-02-09 13:52:16 +01:00
gluster.c gluster: Switch to .bdrv_co_block_status() 2018-03-02 18:39:07 +01:00
io.c block: fix write with zero flag set and iovector provided 2018-03-02 18:39:07 +01:00
iscsi-opts.c Move include qemu/option.h from qemu-common.h to actual users 2018-02-09 13:52:16 +01:00
iscsi.c iscsi: Switch to .bdrv_co_block_status() 2018-03-02 18:39:07 +01:00
linux-aio.c block: explicitly acquire aiocontext in aio callbacks that need it 2017-02-21 11:39:39 +00:00
Makefile.objs block: Add VFIO based NVMe driver 2018-02-08 09:22:03 +08:00
mirror.c block: Switch passthrough drivers to .bdrv_co_block_status() 2018-03-02 18:39:07 +01:00
nbd-client.c nbd: Honor server's advertised minimum block size 2018-03-01 14:02:32 -06:00
nbd-client.h nbd: Minimal structured read for client 2017-10-30 21:48:41 +01:00
nbd.c nbd: Honor server's advertised minimum block size 2018-03-01 14:02:32 -06:00
nfs.c Move include qemu/option.h from qemu-common.h to actual users 2018-02-09 13:52:16 +01:00
null.c null: Switch to .bdrv_co_block_status() 2018-03-02 18:39:07 +01:00
nvme.c nvme: Drop pointless .bdrv_co_get_block_status() 2018-03-02 18:39:07 +01:00
parallels.c parallels: Switch to .bdrv_co_block_status() 2018-03-02 18:39:07 +01:00
parallels.h Clean up includes 2018-02-09 05:05:11 +01:00
qapi.c Include qapi/qmp/qdict.h exactly where needed 2018-02-09 13:52:15 +01:00
qcow2-bitmap.c block: maintain persistent disabled bitmaps 2018-02-13 16:59:58 +01:00
qcow2-cache.c qcow2: Allow configuring the L2 slice size 2018-02-13 17:00:00 +01:00
qcow2-cluster.c qcow2: Rename l2_table in count_cow_clusters() 2018-02-13 17:00:00 +01:00
qcow2-refcount.c qcow2: Update qcow2_update_snapshot_refcount() to support L2 slices 2018-02-13 17:00:00 +01:00
qcow2-snapshot.c qcow2: Discard/zero clusters by byte count 2017-05-11 14:28:07 +02:00
qcow2.c qcow2: Switch to .bdrv_co_block_status() 2018-03-02 18:39:07 +01:00
qcow2.h qcow2: Allow configuring the L2 slice size 2018-02-13 17:00:00 +01:00
qcow.c qcow: Switch to .bdrv_co_block_status() 2018-03-02 18:39:07 +01:00
qed-check.c qed: Use DIV_ROUND_UP 2016-06-07 18:19:24 +03:00
qed-cluster.c qed: protect table cache with CoMutex 2017-07-17 11:34:11 +08:00
qed-l2-cache.c qed: protect table cache with CoMutex 2017-07-17 11:34:11 +08:00
qed-table.c qed: protect table cache with CoMutex 2017-07-17 11:34:11 +08:00
qed.c qed: Switch to .bdrv_co_block_status() 2018-03-02 18:39:07 +01:00
qed.h qed: protect table cache with CoMutex 2017-07-17 11:34:11 +08:00
quorum.c Move include qemu/option.h from qemu-common.h to actual users 2018-02-09 13:52:16 +01:00
raw-format.c raw: Switch to .bdrv_co_block_status() 2018-03-02 18:39:07 +01:00
rbd.c Move include qemu/option.h from qemu-common.h to actual users 2018-02-09 13:52:16 +01:00
replication.c Move include qemu/option.h from qemu-common.h to actual users 2018-02-09 13:52:16 +01:00
sheepdog.c sheepdog: Switch to .bdrv_co_block_status() 2018-03-02 18:39:07 +01:00
snapshot.c Move include qemu/option.h from qemu-common.h to actual users 2018-02-09 13:52:16 +01:00
ssh.c Move include qemu/option.h from qemu-common.h to actual users 2018-02-09 13:52:16 +01:00
stream.c blockjob: remove clock argument from block_job_sleep_ns 2017-11-29 15:11:02 +01:00
throttle-groups.c throttle-groups: forget timer and schedule next TGM on detach 2017-11-16 14:12:57 +00:00
throttle.c block: Switch passthrough drivers to .bdrv_co_block_status() 2018-03-02 18:39:07 +01:00
trace-events block: Add VFIO based NVMe driver 2018-02-08 09:22:03 +08:00
vdi.c vdi: Switch to .bdrv_co_block_status() 2018-03-02 18:39:07 +01:00
vhdx-endian.c vhdx: Use QEMU UUID API 2016-09-23 11:42:52 +08:00
vhdx-log.c vhdx: use QEMU_ALIGN_DOWN 2017-08-31 12:29:07 +02:00
vhdx.c Move include qemu/option.h from qemu-common.h to actual users 2018-02-09 13:52:16 +01:00
vhdx.h block: vhdx - update PAYLOAD_BLOCK_UNMAPPED value to match 1.00 spec 2014-12-12 15:42:22 +00:00
vmdk.c vmdk: Switch to .bdrv_co_block_status() 2018-03-02 18:39:07 +01:00
vpc.c vpc: Switch to .bdrv_co_block_status() 2018-03-02 18:39:07 +01:00
vvfat.c vvfat: Switch to .bdrv_co_block_status() 2018-03-02 18:39:07 +01:00
vxhs.c qobject: Use simpler QDict/QList scalar insertion macros 2017-05-09 09:13:51 +02:00
win32-aio.c block: explicitly acquire aiocontext in aio callbacks that need it 2017-02-21 11:39:39 +00:00
write-threshold.c Include qapi/error.h exactly where needed 2018-02-09 13:50:17 +01:00