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[Qemu-devel] [RFC V5 09/11] quorum: Add quorum_getlength().
From: |
Benoît Canet |
Subject: |
[Qemu-devel] [RFC V5 09/11] quorum: Add quorum_getlength(). |
Date: |
Mon, 27 Aug 2012 09:30:27 +0200 |
Signed-off-by: Benoit Canet <address@hidden>
---
block/quorum.c | 24 ++++++++++++++++++++++++
1 file changed, 24 insertions(+)
diff --git a/block/quorum.c b/block/quorum.c
index 3fa9d53..09eed84 100644
--- a/block/quorum.c
+++ b/block/quorum.c
@@ -549,12 +549,36 @@ static coroutine_fn int quorum_co_flush(BlockDriverState
*bs)
return 0;
}
+static int64_t quorum_getlength(BlockDriverState *bs)
+{
+ BDRVQuorumState *s = bs->opaque;
+ QuorumVoteVersion *winner = NULL;
+ QuorumVotes votes;
+ int64_t value;
+ int i;
+
+ QLIST_INIT(&votes.vote_list);
+ for (i = 0; i < s->total; i++) {
+ quorum_count_vote(&votes, (unsigned long) bdrv_getlength(s->bs[i]), i);
+ }
+
+ /* vote to select the most represented version */
+ winner = quorum_get_vote_winner(&votes);
+
+ value = (int64_t) winner->value;
+ quorum_free_vote_list(&votes);
+
+ return value;
+}
+
static BlockDriver bdrv_quorum = {
.format_name = "quorum",
.protocol_name = "quorum",
.instance_size = sizeof(BDRVQuorumState),
+ .bdrv_getlength = quorum_getlength,
+
.bdrv_file_open = quorum_open,
.bdrv_close = quorum_close,
.bdrv_co_flush_to_disk = quorum_co_flush,
--
1.7.9.5
- [Qemu-devel] [RFC V5 05/11] blkverify: Extract qemu_iovec_clone() and qemu_iovec_compare() from blkverify., (continued)
- [Qemu-devel] [RFC V5 05/11] blkverify: Extract qemu_iovec_clone() and qemu_iovec_compare() from blkverify., Benoît Canet, 2012/08/27
- [Qemu-devel] [RFC V5 04/11] quorum: Add quorum_aio_writev and its dependencies., Benoît Canet, 2012/08/27
- [Qemu-devel] [RFC V5 03/11] quorum: Add quorum_open() and quorum_close()., Benoît Canet, 2012/08/27
- [Qemu-devel] [RFC V5 07/11] quorum: Add quorum_aio_readv., Benoît Canet, 2012/08/27
- [Qemu-devel] [RFC V5 08/11] quorum: Add quorum mechanism., Benoît Canet, 2012/08/27
- [Qemu-devel] [RFC V5 06/11] quorum: Add quorum_co_flush()., Benoît Canet, 2012/08/27
- [Qemu-devel] [RFC V5 10/11] quorum: Add quorum_invalidate_cache()., Benoît Canet, 2012/08/27
- [Qemu-devel] [RFC V5 11/11] quorum: Add quorum_co_is_allocated., Benoît Canet, 2012/08/27
- [Qemu-devel] [RFC V5 09/11] quorum: Add quorum_getlength().,
Benoît Canet <=