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Raman Dzehtsiar 3d3911f16b blockdev-backup: Add error handling option for copy-before-write jobs 
This patch extends the blockdev-backup QMP command to allow users to specify
how to behave when IO errors occur during copy-before-write operations.
Previously, the behavior was fixed and could not be controlled by the user.

The new 'on-cbw-error' option can be set to one of two values:
- 'break-guest-write': Forwards the IO error to the guest and triggers
  the on-source-error policy. This preserves snapshot integrity at the
  expense of guest IO operations.
- 'break-snapshot': Allows the guest OS to continue running normally,
  but invalidates the snapshot and aborts related jobs. This prioritizes
  guest operation over backup consistency.

This enhancement provides more flexibility for backup operations in different
environments where requirements for guest availability versus backup
consistency may vary.

The default behavior remains unchanged to maintain backward compatibility.

Signed-off-by: Raman Dzehtsiar <Raman.Dzehtsiar@gmail.com>
Message-ID: <20250414090025.828660-1-Raman.Dzehtsiar@gmail.com>
Acked-by: Markus Armbruster <armbru@redhat.com>
[vsementsov: fix long lines]
Reviewed-by: Vladimir Sementsov-Ogievskiy <vsementsov@yandex-team.ru>
Tested-by: Vladimir Sementsov-Ogievskiy <vsementsov@yandex-team.ru>
Signed-off-by: Vladimir Sementsov-Ogievskiy <vsementsov@yandex-team.ru>
2025-05-12 18:19:31 +03:00
..
acpi.json qapi: convert "Example" sections without titles 2024-07-17 10:20:53 +02:00
audio.json dbus: add -audio dbus nsamples option 2025-02-03 21:16:07 +04:00
authz.json qapi: Reformat doc comments to conform to current conventions 2023-05-10 10:01:01 +02:00
block-core.json blockdev-backup: Add error handling option for copy-before-write jobs 2025-05-12 18:19:31 +03:00
block-export.json qapi: merge common parts of NbdServerOptions and nbd-server-start data 2025-03-04 16:44:48 -06:00
block.json qapi: Refill doc comments to conform to conventions 2024-08-05 09:31:51 +02:00
char.json qapi/char.json: minor doc rewording for hub device 2025-02-24 13:48:26 +01:00
common.json hw/qdev-properties-system: Introduce EndianMode QAPI enum 2025-02-16 14:33:39 +01:00
compat.json qapi: Belatedly update CompatPolicy documentation for unstable 2023-10-19 07:02:29 +02:00
control.json qapi: Refill doc comments to conform to conventions 2024-08-05 09:31:51 +02:00
crypto.json crypto: Introduce SM3 hash hmac pbkdf algorithm 2024-11-05 18:37:18 +00:00
cryptodev.json qapi: Document QCryptodevBackendServiceType 2024-10-02 09:10:01 +02:00
cxl.json qapi: fix colon in Since tag section 2025-02-10 15:45:04 +01:00
dump.json qapi: Refill doc comments to conform to conventions 2024-08-05 09:31:51 +02:00
ebpf.json qapi/ebpf: Drop temporary 'prefix' 2024-09-10 13:22:47 +02:00
error.json qapi: Reformat doc comments to conform to current conventions 2023-05-10 10:01:01 +02:00
introspect.json qapi/introspect: Supply missing member documentation 2024-10-02 09:10:01 +02:00
job.json qapi: synchronize jobs and block-jobs documentation 2025-05-01 12:12:19 +03:00
machine-common.json qapi/qom: Define cache enumeration and properties for machine 2024-11-05 23:32:25 +00:00
machine-target.json qapi/machine: Rename CpuS390* to S390Cpu*, and drop 'prefix' 2024-09-10 13:22:47 +02:00
machine.json qapi: Rename TargetInfo structure as QemuTargetInfo 2025-04-25 17:09:58 +02:00
meson.build hw/uefi: add var-service-json.c + qapi for NV vars. 2025-03-04 12:02:50 +01:00
migration.json migration: Update migrate_cancel documentation 2025-02-14 15:19:06 -03:00
misc-target.json qapi/machine: Make @dump-skeys command generic 2025-04-23 07:51:25 +02:00
misc.json qapi: Refill doc comments to conform to conventions 2024-08-05 09:31:51 +02:00
net.json net: vhost-user: add QAPI events to report connection state 2025-02-21 07:21:25 -05:00
opts-visitor.c qapi: Inline and remove QERR_INVALID_PARAMETER definition 2024-04-24 09:50:58 +02:00
pci.json qapi/pci: Supply missing member documentation 2024-10-02 09:10:01 +02:00
pragma.json qapi: Document QCryptodevBackendServiceType 2024-10-02 09:10:01 +02:00
qapi-clone-visitor.c qapi: Move include/qapi/qmp/ to include/qobject/ 2025-02-10 15:33:16 +01:00
qapi-dealloc-visitor.c qapi: Move include/qapi/qmp/ to include/qobject/ 2025-02-10 15:33:16 +01:00
qapi-forward-visitor.c qapi: change 'unsigned special_features' to 'uint64_t features' 2025-02-10 15:45:04 +01:00
qapi-schema.json qapi/qapi-schema: Address the introduction's bit rot 2025-04-08 09:04:34 +02:00
qapi-type-helpers.c qapi: New strv_from_str_list() 2024-03-04 07:12:40 +01:00
qapi-util.c qapi: change 'unsigned special_features' to 'uint64_t features' 2025-02-10 15:45:04 +01:00
qapi-visit-core.c qapi: change 'unsigned special_features' to 'uint64_t features' 2025-02-10 15:45:04 +01:00
qdev.json docs: Fix some typos (found by codespell and typos) 2025-04-13 13:45:04 +03:00
qmp-dispatch.c qapi: change 'unsigned special_features' to 'uint64_t features' 2025-02-10 15:45:04 +01:00
qmp-event.c qapi: Move include/qapi/qmp/ to include/qobject/ 2025-02-10 15:33:16 +01:00
qmp-registry.c qapi: change 'unsigned special_features' to 'uint64_t features' 2025-02-10 15:45:04 +01:00
qobject-input-visitor.c qapi: change 'unsigned special_features' to 'uint64_t features' 2025-02-10 15:45:04 +01:00
qobject-output-visitor.c qapi: change 'unsigned special_features' to 'uint64_t features' 2025-02-10 15:45:04 +01:00
qom.json qapi/qom: Change Since entry for AcpiGenericPortProperties to 9.2 2024-11-26 17:18:06 -05:00
replay.json qapi: convert "Example" sections without titles 2024-07-17 10:20:53 +02:00
rocker.json qapi/rocker: Tidy up query-rocker-of-dpa-flows example 2025-04-08 09:04:20 +02:00
run-state.json qapi: Refill doc comments to conform to conventions 2024-08-05 09:31:51 +02:00
sockets.json qapi: Refill doc comments to conform to conventions 2024-08-05 09:31:51 +02:00
stats.json qapi: Refill doc comments to conform to conventions 2024-08-05 09:31:51 +02:00
string-input-visitor.c qapi: Move include/qapi/qmp/ to include/qobject/ 2025-02-10 15:33:16 +01:00
string-output-visitor.c string-output-visitor: Fix (pseudo) struct handling 2024-01-26 11:16:58 +01:00
tpm.json qapi: convert "Example" sections without titles 2024-07-17 10:20:53 +02:00
trace-events qapi: Generalize struct member policy checking 2021-10-29 18:23:09 +02:00
trace.h trace: switch position of headers to what Meson requires 2020-08-21 06:18:24 -04:00
trace.json qapi: convert "Example" sections without titles 2024-07-17 10:20:53 +02:00
transaction.json qapi: Refill doc comments to conform to conventions 2024-08-05 09:31:51 +02:00
uefi.json hw/uefi: add var-service-json.c + qapi for NV vars. 2025-03-04 12:02:50 +01:00
ui.json qapi/ui: Fix documentation of upper bound value in InputMoveEvent 2025-02-10 15:45:04 +01:00
vfio.json qapi/vfio: Rename VfioMigrationState to Qapi*, and drop prefix 2024-09-10 14:03:45 +02:00
virtio.json hw/vmapple/virtio-blk: Add support for apple virtio-blk 2025-03-04 14:45:34 +01:00
yank.json qapi: convert "Example" sections without titles 2024-07-17 10:20:53 +02:00