From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([208.118.235.92]:49897) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1T5tmk-0001g8-Du for qemu-devel@nongnu.org; Mon, 27 Aug 2012 03:31:03 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1T5tmf-0000lw-IO for qemu-devel@nongnu.org; Mon, 27 Aug 2012 03:30:58 -0400 Received: from mail-wg0-f53.google.com ([74.125.82.53]:62199) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1T5tmf-0000iq-Cc for qemu-devel@nongnu.org; Mon, 27 Aug 2012 03:30:53 -0400 Received: by mail-wg0-f53.google.com with SMTP id fm10so2465980wgb.10 for ; Mon, 27 Aug 2012 00:30:53 -0700 (PDT) From: "=?UTF-8?q?Beno=C3=AEt=20Canet?=" Date: Mon, 27 Aug 2012 09:30:27 +0200 Message-Id: <1346052629-15686-10-git-send-email-benoit@irqsave.net> In-Reply-To: <1346052629-15686-1-git-send-email-benoit@irqsave.net> References: <1346052629-15686-1-git-send-email-benoit@irqsave.net> Subject: [Qemu-devel] [RFC V5 09/11] quorum: Add quorum_getlength(). List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: qemu-devel@nongnu.org Cc: kwolf@redhat.com, stefanha@linux.vnet.ibm.com, blauwirbel@gmail.com, pbonzini@redhat.com, eblake@redhat.com, =?UTF-8?q?Beno=C3=AEt=20Canet?= Signed-off-by: Benoit Canet --- 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