From patchwork Mon Jan 28 17:07:22 2013 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit Subject: [RFC,V8,10/13] quorum: Add quorum_co_flush(). Date: Mon, 28 Jan 2013 07:07:22 -0000 From: =?utf-8?q?Beno=C3=AEt_Canet_=3Cbenoit=40irqsave=2Enet=3E?= X-Patchwork-Id: 216293 Message-Id: <1359392845-15905-11-git-send-email-benoit@irqsave.net> To: qemu-devel@nongnu.org Cc: kwolf@redhat.com, =?UTF-8?q?Beno=C3=AEt=20Canet?= , stefanha@redhat.com Makes a vote to select error if any. Signed-off-by: Benoit Canet --- block/quorum.c | 34 ++++++++++++++++++++++++++++++++++ 1 file changed, 34 insertions(+) diff --git a/block/quorum.c b/block/quorum.c index 459434f..306a2df 100644 --- a/block/quorum.c +++ b/block/quorum.c @@ -577,12 +577,46 @@ static int coroutine_fn quorum_co_is_allocated(BlockDriverState *bs, return result; } +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; + bool error = false; + + QLIST_INIT(&error_votes.vote_list); + error_votes.compare = quorum_long_compare; + + for (i = 0; i < s->total; i++) { + result = bdrv_co_flush(s->bs[i]); + if (result) { + error = true; + result_value.l = result; + quorum_count_vote(&error_votes, &result_value, i); + } + } + + if (error) { + 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,