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block/replication.c: Ignore requests after failover

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After failover the Secondary side of replication shouldn't change state, because
it now functions as our primary disk.

In replication_start, replication_do_checkpoint, replication_stop, ignore
the request if current state is BLOCK_REPLICATION_DONE (sucessful failover) or
BLOCK_REPLICATION_FAILOVER (failover in progres i.e. currently merging active
and hidden images into the base image).

Signed-off-by: Lukas Straub <lukasstraub2@web.de>
Reviewed-by: Zhang Chen <chen.zhang@intel.com>
Acked-by: Max Reitz <mreitz@redhat.com>
Signed-off-by: Jason Wang <jasowang@redhat.com>
This commit is contained in:
Lukas Straub 2019-10-24 16:25:35 +02:00 committed by Jason Wang
parent dda8f1854b
commit 08ddb4eb6d
1 changed files with 34 additions and 1 deletions
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35
block/replication.c
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@ -450,6 +450,17 @@ static void replication_start(ReplicationState *rs, ReplicationMode mode,
aio_context_acquire(aio_context);
s = bs->opaque;
if (s->stage == BLOCK_REPLICATION_DONE ||
s->stage == BLOCK_REPLICATION_FAILOVER) {
/*
* This case happens when a secondary is promoted to primary.
* Ignore the request because the secondary side of replication
* doesn't have to do anything anymore.
*/
aio_context_release(aio_context);
return;
}
if (s->stage != BLOCK_REPLICATION_NONE) {
error_setg(errp, "Block replication is running or done");
aio_context_release(aio_context);
@ -574,6 +585,17 @@ static void replication_do_checkpoint(ReplicationState *rs, Error **errp)
aio_context_acquire(aio_context);
s = bs->opaque;
if (s->stage == BLOCK_REPLICATION_DONE ||
s->stage == BLOCK_REPLICATION_FAILOVER) {
/*
* This case happens when a secondary was promoted to primary.
* Ignore the request because the secondary side of replication
* doesn't have to do anything anymore.
*/
aio_context_release(aio_context);
return;
}
if (s->mode == REPLICATION_MODE_SECONDARY) {
secondary_do_checkpoint(s, errp);
}
@ -590,7 +612,7 @@ static void replication_get_error(ReplicationState *rs, Error **errp)
aio_context_acquire(aio_context);
s = bs->opaque;
if (s->stage != BLOCK_REPLICATION_RUNNING) {
if (s->stage == BLOCK_REPLICATION_NONE) {
error_setg(errp, "Block replication is not running");
aio_context_release(aio_context);
return;
@ -632,6 +654,17 @@ static void replication_stop(ReplicationState *rs, bool failover, Error **errp)
aio_context_acquire(aio_context);
s = bs->opaque;
if (s->stage == BLOCK_REPLICATION_DONE ||
s->stage == BLOCK_REPLICATION_FAILOVER) {
/*
* This case happens when a secondary was promoted to primary.
* Ignore the request because the secondary side of replication
* doesn't have to do anything anymore.
*/
aio_context_release(aio_context);
return;
}
if (s->stage != BLOCK_REPLICATION_RUNNING) {
error_setg(errp, "Block replication is not running");
aio_context_release(aio_context);