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migration: add has_postcopy savevm handler

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Now postcopy-able states are recognized by not NULL
save_live_complete_postcopy handler. But when we have several different
postcopy-able states, it is not convenient. Ram postcopy may be
disabled, while some other postcopy enabled, in this case Ram state
should behave as it is not postcopy-able.

This patch add separate has_postcopy handler to specify behaviour of
savevm state.

Signed-off-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com>
Reviewed-by: Juan Quintela <quintela@redhat.com>
Signed-off-by: Juan Quintela <quintela@redhat.com>
This commit is contained in:
Vladimir Sementsov-Ogievskiy 2017-07-10 19:30:14 +03:00 • committed by Juan Quintela
parent d7788151a0
commit c646762736
3 changed files with 11 additions and 2 deletions
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1
include/migration/register.h
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@ -24,6 +24,7 @@ typedef struct SaveVMHandlers {
/* This runs both outside and inside the iothread lock. */
bool (*is_active)(void *opaque);
bool (*has_postcopy)(void *opaque);
/* This runs outside the iothread lock in the migration case, and
* within the lock in the savevm case. The callback had better only