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xemu/block
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Eric Blake 365fed5111 qed: Simplify backing reads 
The other four drivers that support backing files (qcow, qcow2,
parallels, vmdk) all rely on the block layer to populate zeroes when
reading beyond EOF of a short backing file.  We can simplify the qed
code by doing likewise.

Signed-off-by: Eric Blake <eblake@redhat.com>
Reviewed-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com>
Message-Id: <20200528094405.145708-11-vsementsov@virtuozzo.com>
Signed-off-by: Max Reitz <mreitz@redhat.com>
2020-07-06 10:34:14 +02:00
..
monitor
blockdev: Split off basic bitmap operations for qemu-img
2020-05-19 10:32:14 -05:00
accounting.c
block: add empty account cookie type
2019-10-10 10:56:18 +02:00
aio_task.c
block: introduce aio task pool
2019-10-10 10:56:17 +02:00
amend.c
block/core: add generic infrastructure for x-blockdev-amend qmp command
2020-07-06 08:49:28 +02:00
backup-top.c
block: Drop @child_class from bdrv_child_perm()
2020-05-18 19:05:25 +02:00
backup-top.h
block: introduce backup-top filter driver
2019-10-10 10:56:18 +02:00
backup.c
backup: Make sure that source and target size match
2020-05-08 13:26:35 +02:00
blkdebug.c
block: Drop @child_class from bdrv_child_perm()
2020-05-18 19:05:25 +02:00
blklogwrites.c
block: Drop @child_class from bdrv_child_perm()
2020-05-18 19:05:25 +02:00
blkreplay.c
block: Use bdrv_default_perms()
2020-05-18 19:05:25 +02:00
blkverify.c
block: Use bdrv_default_perms()
2020-05-18 19:05:25 +02:00
block-backend.c
block: Pass BdrvChildRole in remaining cases
2020-05-18 19:05:25 +02:00
block-copy.c
block/block-copy: block_copy_dirty_clusters: fix failure check
2020-07-06 08:33:06 +02:00
bochs.c
block: Use bdrv_default_perms()
2020-05-18 19:05:25 +02:00
cloop.c
block: Use bdrv_default_perms()
2020-05-18 19:05:25 +02:00
commit.c
block: Drop @child_class from bdrv_child_perm()
2020-05-18 19:05:25 +02:00
copy-on-read.c
block: Drop @child_class from bdrv_child_perm()
2020-05-18 19:05:25 +02:00
create.c
block/create: Do not abort if a block driver is not available
2019-09-13 12:18:37 +02:00
crypto.c
block/crypto: drop unallocated_blocks_are_zero
2020-07-06 10:34:14 +02:00
crypto.h
block/crypto: implement the encryption key management
2020-07-06 08:49:28 +02:00
curl.c
block/curl: HTTP header field names are case insensitive
2020-03-11 12:42:29 +01:00
dirty-bitmap.c
block/dirty-bitmap: add bdrv_has_named_bitmaps helper
2020-05-28 13:15:22 -05:00
dmg-bz2.c
Include qemu-common.h exactly where needed
2019-06-12 13:20:20 +02:00
dmg-lzfse.c
…
dmg.c
block: Use bdrv_default_perms()
2020-05-18 19:05:25 +02:00
dmg.h
Include qemu-common.h exactly where needed
2019-06-12 13:20:20 +02:00
file-posix.c
block/file-posix: drop unallocated_blocks_are_zero
2020-07-06 10:34:14 +02:00
file-win32.c
block: Drop unused .bdrv_has_zero_init_truncate
2020-05-08 13:26:35 +02:00
filter-compress.c
block: Use bdrv_default_perms()
2020-05-18 19:05:25 +02:00
gluster.c
gluster: Drop useless has_zero_init callback
2020-05-08 13:26:35 +02:00
io_uring.c
io_uring: use io_uring_cq_ready() to check for ready cqes
2020-06-05 09:54:48 +01:00
io.c
block: drop unallocated_blocks_are_zero
2020-07-06 10:34:14 +02:00
iscsi-opts.c
…
iscsi.c
block/iscsi: drop unallocated_blocks_are_zero
2020-07-06 10:34:14 +02:00
linux-aio.c
misc: Replace zero-length arrays with flexible array member (automatic)
2020-03-16 22:07:42 +01:00
Makefile.objs
block/core: add generic infrastructure for x-blockdev-amend qmp command
2020-07-06 08:49:28 +02:00
mirror.c
block: Drop @child_class from bdrv_child_perm()
2020-05-18 19:05:25 +02:00
nbd.c
block: Call attention to truncation of long NBD exports
2020-06-10 12:58:59 -05:00
nfs.c
block: Drop unused .bdrv_has_zero_init_truncate
2020-05-08 13:26:35 +02:00
null.c
replay: add BH oneshot event for block layer
2019-10-14 17:12:48 +02:00
nvme.c
block/nvme: support nested aio_poll()
2020-06-23 15:46:08 +01:00
parallels.c
block: Use bdrv_default_perms()
2020-05-18 19:05:25 +02:00
parallels.h
…
qapi-sysemu.c
block: Move system emulator QMP commands to block/qapi-sysemu.c
2020-03-06 17:15:38 +01:00
qapi.c
block: Fix VM size field width in snapshot dump
2020-02-20 16:43:42 +01:00
qcow2-bitmap.c
qcow2: Tweak comments on qcow2_get_persistent_dirty_bitmap_size
2020-06-17 14:53:39 +02:00
qcow2-cache.c
core: replace getpagesize() with qemu_real_host_page_size
2019-10-26 15:38:06 +02:00
qcow2-cluster.c
qcow2: Support BDRV_REQ_ZERO_WRITE for truncate
2020-04-30 17:51:07 +02:00
qcow2-refcount.c
block: Comment cleanups
2020-05-05 13:17:36 +02:00
qcow2-snapshot.c
qcow2: Allow resize of images with internal snapshots
2020-05-05 13:17:36 +02:00
qcow2-threads.c
qcow2: add zstd cluster compression
2020-05-13 14:20:31 +02:00
qcow2.c
block: drop unallocated_blocks_are_zero
2020-07-06 10:34:14 +02:00
qcow2.h
qcow2: Expose bitmaps' size during measure
2020-05-28 13:16:16 -05:00
qcow.c
block: Use bdrv_default_perms()
2020-05-18 19:05:25 +02:00
qed-check.c
…
qed-cluster.c
…
qed-l2-cache.c
…
qed-table.c
…
qed.c
qed: Simplify backing reads
2020-07-06 10:34:14 +02:00
qed.h
qed: Simplify backing reads
2020-07-06 10:34:14 +02:00
quorum.c
block: Drop @child_class from bdrv_child_perm()
2020-05-18 19:05:25 +02:00
raw-format.c
qcow2: Expose bitmaps' size during measure
2020-05-28 13:16:16 -05:00
rbd.c
block: Drop unused .bdrv_has_zero_init_truncate
2020-05-08 13:26:35 +02:00
replication.c
block: Drop @child_class from bdrv_child_perm()
2020-05-18 19:05:25 +02:00
sheepdog.c
block: Drop unused .bdrv_has_zero_init_truncate
2020-05-08 13:26:35 +02:00
snapshot.c
block/snapshot: rename Error ** parameter to more common errp
2019-12-18 08:43:19 +01:00
ssh.c
block: Drop unused .bdrv_has_zero_init_truncate
2020-05-08 13:26:35 +02:00
stream.c
block/stream: Remove redundant statement in stream_run()
2020-03-09 15:59:31 +01:00
throttle-groups.c
qom: Drop parameter @errp of object_property_add() & friends
2020-05-15 07:07:58 +02:00
throttle.c
block: Use bdrv_default_perms()
2020-05-18 19:05:25 +02:00
trace-events
block/nvme: support nested aio_poll()
2020-06-23 15:46:08 +01:00
vdi.c
block/vdi: return ZERO block-status when appropriate
2020-07-06 08:49:28 +02:00
vhdx-endian.c
Include qemu-common.h exactly where needed
2019-06-12 13:20:20 +02:00
vhdx-log.c
block: Add flags to bdrv(_co)_truncate()
2020-04-30 17:51:07 +02:00
vhdx.c
block/vhdx: drop unallocated_blocks_are_zero
2020-07-06 10:34:14 +02:00
vhdx.h
…
vmdk.c
block: Use bdrv_default_perms()
2020-05-18 19:05:25 +02:00
vpc.c
block/vpc: return ZERO block-status when appropriate
2020-07-06 10:32:38 +02:00
vvfat.c
vvfat: Fix array_remove_slice()
2020-07-03 09:37:03 +02:00
vxhs.c
replay: add BH oneshot event for block layer
2019-10-14 17:12:48 +02:00
win32-aio.c
…
write-threshold.c
…