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Vladimir Sementsov-Ogievskiy f1bb39a8a5 block/copy-before-write: add on-cbw-error open parameter 
Currently, behavior on copy-before-write operation failure is simple:
report error to the guest.

Let's implement alternative behavior: break the whole copy-before-write
process (and corresponding backup job or NBD client) but keep guest
working. It's needed if we consider guest stability as more important.

The realisation is simple: on copy-before-write failure we set
s->snapshot_ret and continue guest operations. s->snapshot_ret being
set will lead to all further snapshot API requests. Note that all
in-flight snapshot-API requests may still success: we do wait for them
on BREAK_SNAPSHOT-failure path in cbw_do_copy_before_write().

Signed-off-by: Vladimir Sementsov-Ogievskiy <vsementsov@openvz.org>
Reviewed-by: Hanna Reitz <hreitz@redhat.com>
Signed-off-by: Vladimir Sementsov-Ogievskiy <vsementsov@yandex-team.ru>
2022-06-28 10:20:31 +03:00
..
export
vduse-blk: Add name option
2022-06-24 17:07:06 +02:00
monitor
block: improve block_dirty_bitmap_merge(): don't allocate extra bitmap
2022-06-24 17:07:06 +02:00
accounting.c
block/accounting: Use lock guard macros
2020-12-11 17:52:39 +01:00
aio_task.c
block/aio_task: assert max_busy_tasks is greater than 0
2021-10-05 18:56:41 +02:00
amend.c
block/amend: Keep strong reference to BDS
2022-03-04 18:18:26 +01:00
backup.c
block: simplify handling of try to merge different sized bitmaps
2022-06-24 17:07:06 +02:00
blkdebug.c
block: use int64_t instead of int in driver discard handlers
2021-09-29 13:46:32 -05:00
blklogwrites.c
block: use int64_t instead of int in driver discard handlers
2021-09-29 13:46:32 -05:00
blkreplay.c
block: use int64_t instead of int in driver discard handlers
2021-09-29 13:46:32 -05:00
blkverify.c
Replace GCC_FMT_ATTR with G_GNUC_PRINTF
2022-03-22 14:40:51 +04:00
block-backend.c
block: Support passing NULL ops to blk_set_dev_ops()
2022-06-24 17:07:06 +02:00
block-copy.c
target-arm queue:
2022-03-08 15:26:10 +00:00
block-gen.h
scripts: add block-coroutine-wrapper.py
2020-10-05 10:59:06 +01:00
bochs.c
block: use int64_t instead of uint64_t in driver read handlers
2021-09-29 13:46:31 -05:00
cloop.c
block: use int64_t instead of uint64_t in driver read handlers
2021-09-29 13:46:31 -05:00
commit.c
osdep: Move memalign-related functions to their own header
2022-03-07 13:16:49 +00:00
copy-before-write.c
block/copy-before-write: add on-cbw-error open parameter
2022-06-28 10:20:31 +03:00
copy-before-write.h
block/copy-before-write.h: global state API + assertions
2022-03-04 18:18:25 +01:00
copy-on-read.c
block: use int64_t instead of int in driver discard handlers
2021-09-29 13:46:32 -05:00
copy-on-read.h
Clean up ill-advised or unusual header guards
2022-05-11 16:50:01 +02:00
coroutines.h
Clean up header guards that don't match their file name
2022-05-11 16:49:06 +02:00
create.c
block_int-common.h: assertions in the callers of BlockDriver function pointers
2022-03-04 18:18:25 +01:00
crypto.c
osdep: Move memalign-related functions to their own header
2022-03-07 13:16:49 +00:00
crypto.h
nomaintainer: Fix Lesser GPL version number
2020-11-15 17:04:40 +01:00
curl.c
block/curl.c: Check error return from curl_easy_setopt()
2022-03-07 09:19:20 +01:00
dirty-bitmap.c
block: simplify handling of try to merge different sized bitmaps
2022-06-24 17:07:06 +02:00
dmg-bz2.c
Include qemu-common.h exactly where needed
2019-06-12 13:20:20 +02:00
dmg-lzfse.c
block: Remove unused include
2020-11-09 15:44:21 +01:00
dmg.c
osdep: Move memalign-related functions to their own header
2022-03-07 13:16:49 +00:00
dmg.h
Include qemu-common.h exactly where needed
2019-06-12 13:20:20 +02:00
file-posix.c
block: move fcntl_setfl()
2022-05-03 15:17:53 +04:00
file-win32.c
block: use int64_t instead of uint64_t in driver write handlers
2021-09-29 13:46:31 -05:00
filter-compress.c
block: use int64_t instead of int in driver discard handlers
2021-09-29 13:46:32 -05:00
gluster.c
block/gluster: correctly set max_pdiscard
2022-06-24 17:07:06 +02:00
io_uring.c
Use io_uring_register_ring_fd() to skip fd operations
2022-06-15 14:50:41 +01:00
io.c
block: drop unused bdrv_co_drain() API
2022-06-24 17:07:06 +02:00
iscsi-opts.c
modules: add block module annotations
2021-07-09 18:20:27 +02:00
iscsi.c
include: move qemu_get_vm_name() to sysemu.h
2022-04-06 14:31:43 +02:00
linux-aio.c
linux-aio: explain why max batch is checked in laio_io_unplug()
2022-06-15 16:43:42 +01:00
meson.build
block: introduce snapshot-access block driver
2022-03-07 09:33:31 +01:00
mirror.c
osdep: Move memalign-related functions to their own header
2022-03-07 13:16:49 +00:00
nbd.c
nbd: Drop dead code spotted by Coverity
2022-06-24 17:07:06 +02:00
nfs.c
aio-posix: split poll check from ready handler
2022-01-12 17:09:39 +00:00
null.c
block: use int64_t instead of uint64_t in driver write handlers
2021-09-29 13:46:31 -05:00
nvme.c
Replace qemu_real_host_page variables with inlined functions
2022-04-06 10:50:38 +02:00
parallels-ext.c
block: Fix misleading hexadecimal format
2022-03-24 10:38:42 +00:00
parallels.c
Replace qemu_real_host_page variables with inlined functions
2022-04-06 10:50:38 +02:00
parallels.h
parallels: support bitmap extension for read-only mode
2021-03-08 14:56:55 +01:00
preallocate.c
block: fix preallocate filter: don't do unaligned preallocate requests
2022-03-07 09:19:20 +01:00
progress_meter.c
progressmeter: protect with a mutex
2021-06-25 14:24:24 +03:00
qapi-sysemu.c
block: add 'force' parameter to 'blockdev-change-medium' command
2022-04-25 12:02:36 +02:00
qapi.c
block: use GDateTime for formatting timestamp when dumping snapshot info
2021-06-14 13:28:50 +01:00
qcow2-bitmap.c
nbd patches for 2021-03-09
2021-03-11 13:57:08 +00:00
qcow2-cache.c
Replace qemu_real_host_page variables with inlined functions
2022-04-06 10:50:38 +02:00
qcow2-cluster.c
osdep: Move memalign-related functions to their own header
2022-03-07 13:16:49 +00:00
qcow2-refcount.c
qcow2: Add errp to rebuild_refcount_structure()
2022-04-20 12:09:17 +02:00
qcow2-snapshot.c
osdep: Move memalign-related functions to their own header
2022-03-07 13:16:49 +00:00
qcow2-threads.c
qcow2: add zstd cluster compression
2020-05-13 14:20:31 +02:00
qcow2.c
qcow2: Do not reopen data_file in invalidate_cache
2022-05-04 15:55:23 +02:00
qcow2.h
Replace GCC_FMT_ATTR with G_GNUC_PRINTF
2022-03-22 14:40:51 +04:00
qcow.c
osdep: Move memalign-related functions to their own header
2022-03-07 13:16:49 +00:00
qed-check.c
block/qed: add missed coroutine_fn markers
2019-04-30 15:29:00 +02:00
qed-cluster.c
…
qed-l2-cache.c
osdep: Move memalign-related functions to their own header
2022-03-07 13:16:49 +00:00
qed-table.c
osdep: Move memalign-related functions to their own header
2022-03-07 13:16:49 +00:00
qed.c
osdep: Move memalign-related functions to their own header
2022-03-07 13:16:49 +00:00
qed.h
qed: Simplify backing reads
2020-07-06 10:34:14 +02:00
quorum.c
osdep: Move memalign-related functions to their own header
2022-03-07 13:16:49 +00:00
raw-format.c
osdep: Move memalign-related functions to their own header
2022-03-07 13:16:49 +00:00
rbd.c
block/rbd: report a better error when namespace does not exist
2022-06-24 17:07:06 +02:00
replication.c
job: @force parameter for job_cancel_sync()
2021-10-07 10:42:09 +02:00
reqlist.c
block/reqlist: add reqlist_wait_all()
2022-03-07 09:33:30 +01:00
snapshot-access.c
block: introduce snapshot-access block driver
2022-03-07 09:33:31 +01:00
snapshot.c
include/block/snapshot: global state API + assertions
2022-03-04 18:18:25 +01:00
ssh.c
Replace GCC_FMT_ATTR with G_GNUC_PRINTF
2022-03-22 14:40:51 +04:00
stream.c
block/stream: Drain subtree around graph change
2022-03-29 16:30:55 +02:00
throttle-groups.c
block/throttle-groups: throttle_group_co_io_limits_intercept(): 64bit bytes
2021-02-03 08:14:00 -06:00
throttle.c
block: use int64_t instead of int in driver discard handlers
2021-09-29 13:46:32 -05:00
trace-events
block/nvme: Display CQ/SQ pointer in nvme_free_queue_pair()
2021-11-02 15:49:12 +01:00
trace.h
trace: switch position of headers to what Meson requires
2020-08-21 06:18:24 -04:00
vdi.c
osdep: Move memalign-related functions to their own header
2022-03-07 13:16:49 +00:00
vhdx-endian.c
Include qemu-common.h exactly where needed
2019-06-12 13:20:20 +02:00
vhdx-log.c
osdep: Move memalign-related functions to their own header
2022-03-07 13:16:49 +00:00
vhdx.c
osdep: Move memalign-related functions to their own header
2022-03-07 13:16:49 +00:00
vhdx.h
block/vhdx: Use IEC binary prefixes for size constants
2019-04-30 15:29:00 +02:00
vmdk.c
block/vmdk: Fix reopening bs->file
2022-05-04 15:55:23 +02:00
vpc.c
osdep: Move memalign-related functions to their own header
2022-03-07 13:16:49 +00:00
vvfat.c
vvfat: Fix vvfat_write() for writes before the root directory
2022-01-14 12:03:16 +01:00
win32-aio.c
osdep: Move memalign-related functions to their own header
2022-03-07 13:16:49 +00:00
write-threshold.c
write-threshold: deal with includes
2021-05-14 16:14:10 +02:00