[Qemu-devel] [PATCH V13 10/13] quorum: Add quorum_co_flush().

[Benoît Canet]

From: Benoît Canet <address@hidden>

Makes a vote to select error if any.

Signed-off-by: Benoit Canet <address@hidden>
---
 block/quorum.c | 34 ++++++++++++++++++++++++++++++++++
 1 file changed, 34 insertions(+)

diff --git a/block/quorum.c b/block/quorum.c
index 0f4f476..43144a5 100644
--- a/block/quorum.c
+++ b/block/quorum.c
@@ -670,12 +670,46 @@ free_exit:
     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_64bits_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,
-- 
1.8.3.2