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block: package committing code in qmp_transaction() 

The code is simply moved into a separate function.

Signed-off-by: Wenchao Xia <xiawenc@linux.vnet.ibm.com>
Reviewed-by: Kevin Wolf <kwolf@redhat.com>
Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
master
Wenchao Xia 2013-05-08 18:25:14 +08:00 committed by Stefan Hajnoczi
parent e2a31e8798
commit 3b0047e86a
1 changed files with 12 additions and 7 deletions
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19
blockdev.c
View File

@ -871,6 +871,17 @@ static void external_snapshot_prepare(BlockdevAction *action,
}
}
static void external_snapshot_commit(BlkTransactionStates *states)
{
/* This removes our old bs from the bdrv_states, and adds the new bs */
bdrv_append(states->new_bs, states->old_bs);
/* We don't need (or want) to use the transactional
* bdrv_reopen_multiple() across all the entries at once, because we
* don't want to abort all of them if one of them fails the reopen */
bdrv_reopen(states->new_bs, states->new_bs->open_flags & ~BDRV_O_RDWR,
NULL);
}
/*
* 'Atomic' group snapshots. The snapshots are taken as a set, and if any fail
* then we do not pivot any of the devices in the group, and abandon the
@ -916,13 +927,7 @@ void qmp_transaction(BlockdevActionList *dev_list, Error **errp)
/* Now we are going to do the actual pivot. Everything up to this point
* is reversible, but we are committed at this point */
QSIMPLEQ_FOREACH(states, &snap_bdrv_states, entry) {
/* This removes our old bs from the bdrv_states, and adds the new bs */
bdrv_append(states->new_bs, states->old_bs);
/* We don't need (or want) to use the transactional
* bdrv_reopen_multiple() across all the entries at once, because we
* don't want to abort all of them if one of them fails the reopen */
bdrv_reopen(states->new_bs, states->new_bs->open_flags & ~BDRV_O_RDWR,
NULL);
external_snapshot_commit(states);
}
/* success */