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[V17,09/12] quorum: Add quorum_co_flush().

Message ID 1392242799-16364-10-git-send-email-benoit.canet@irqsave.net
State New
Headers show

Commit Message

Benoît Canet Feb. 12, 2014, 10:06 p.m. UTC 
From: Benoît Canet <benoit@irqsave.net>

Makes a vote to select error if any.

Signed-off-by: Benoit Canet <benoit@irqsave.net>
---
 block/quorum.c | 28 ++++++++++++++++++++++++++++
 1 file changed, 28 insertions(+)

Comments

Max Reitz Feb. 15, 2014, 1:54 a.m. UTC | #1 
On 12.02.2014 23:06, Benoît Canet wrote:
> From: Benoît Canet <benoit@irqsave.net>
>
> Makes a vote to select error if any.
>
> Signed-off-by: Benoit Canet <benoit@irqsave.net>
> ---
>   block/quorum.c | 28 ++++++++++++++++++++++++++++
>   1 file changed, 28 insertions(+)

Reviewed-by: Max Reitz <mreitz@redhat.com>
diff mbox

Patch

diff --git a/block/quorum.c b/block/quorum.c
index 5f8f626..818c72c 100644
--- a/block/quorum.c
+++ b/block/quorum.c
@@ -634,12 +634,40 @@  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,