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authorBenoƮt Canet <benoit@irqsave.net>2014-02-21 22:21:18 +0100
committerKevin Wolf <kwolf@redhat.com>2014-02-21 22:29:51 +0100
commit1c508d174d4b9dfd066c3729a2560afeef5e081f (patch)
treea271590b33522812a961e9baf6ea9705fe23178d /block
parenta28e4c408b28e4d55c5bd327a19290e1da3855dd (diff)
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quorum: Add quorum_co_flush().
Makes a vote to select error if any. Signed-off-by: Benoit Canet <benoit@irqsave.net> Reviewed-by: Max Reitz <mreitz@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Diffstat (limited to 'block')
-rw-r--r--block/quorum.c28
1 files changed, 28 insertions, 0 deletions
diff --git a/block/quorum.c b/block/quorum.c
index 38bc217..840afda 100644
--- a/block/quorum.c
+++ b/block/quorum.c
@@ -629,12 +629,40 @@ static void quorum_invalidate_cache(BlockDriverState *bs)
}
}
+static coroutine_fn int quorum_co_flush(BlockDriverState *bs)
+{
+ BDRVQuorumState *s = bs->opaque;
+ QuorumVoteVersion *winner = NULL;
+ QuorumVotes error_votes;
+ QuorumVoteValue result_value;
+ int i;
+ int result = 0;
+
+ QLIST_INIT(&error_votes.vote_list);
+ error_votes.compare = quorum_64bits_compare;
+
+ for (i = 0; i < s->num_children; i++) {
+ result = bdrv_co_flush(s->bs[i]);
+ result_value.l = result;
+ quorum_count_vote(&error_votes, &result_value, i);
+ }
+
+ winner = quorum_get_vote_winner(&error_votes);
+ result = winner->value.l;
+
+ quorum_free_vote_list(&error_votes);
+
+ return result;
+}
+
static BlockDriver bdrv_quorum = {
.format_name = "quorum",
.protocol_name = "quorum",
.instance_size = sizeof(BDRVQuorumState),
+ .bdrv_co_flush_to_disk = quorum_co_flush,
+
.bdrv_getlength = quorum_getlength,
.bdrv_aio_readv = quorum_aio_readv,