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migration: introduce SaveVMHandlers.resume_prepare

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This is hook function to be called when a postcopy migration wants to
resume from a failure. For each module, it should provide its own
recovery logic before we switch to the postcopy-active state.

Reviewed-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
Signed-off-by: Peter Xu <peterx@redhat.com>
Message-Id: <20180502104740.12123-16-peterx@redhat.com>
Signed-off-by: Juan Quintela <quintela@redhat.com>
This commit is contained in:
Peter Xu 2018-05-02 18:47:31 +08:00 • committed by Juan Quintela
parent 13955b89ce
commit d1b8eadbc4
5 changed files with 48 additions and 1 deletions
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2
include/migration/register.h
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@ -64,6 +64,8 @@ typedef struct SaveVMHandlers {
LoadStateHandler *load_state;
int (*load_setup)(QEMUFile *f, void *opaque);
int (*load_cleanup)(void *opaque);
/* Called when postcopy migration wants to resume from failure */
int (*resume_prepare)(MigrationState *s, void *opaque);
} SaveVMHandlers;
int register_savevm_live(DeviceState *dev,