Raman Dzehtsiar <raman.dzehts...@gmail.com> writes: > 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.dzehts...@gmail.com>
Acked-by: Markus Armbruster <arm...@redhat.com>
