From patchwork Tue Oct 23 12:23:49 2012 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: =?utf-8?q?Beno=C3=AEt_Canet?= X-Patchwork-Id: 193481 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Received: from lists.gnu.org (lists.gnu.org [208.118.235.17]) (using TLSv1 with cipher AES256-SHA (256/256 bits)) (Client did not present a certificate) by ozlabs.org (Postfix) with ESMTPS id 2623C2C007D for ; Tue, 23 Oct 2012 23:56:54 +1100 (EST) Received: from localhost ([::1]:38674 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1TQe2O-00040Z-BO for incoming@patchwork.ozlabs.org; Tue, 23 Oct 2012 08:56:52 -0400 Received: from eggs.gnu.org ([208.118.235.92]:44030) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1TQdXD-0001Ln-54 for qemu-devel@nongnu.org; Tue, 23 Oct 2012 08:24:44 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1TQdXB-0007EX-WC for qemu-devel@nongnu.org; Tue, 23 Oct 2012 08:24:39 -0400 Received: from nodalink.pck.nerim.net ([62.212.105.220]:50975 helo=paradis.irqsave.net) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1TQdXB-0007EP-Nj for qemu-devel@nongnu.org; Tue, 23 Oct 2012 08:24:37 -0400 Received: by paradis.irqsave.net (Postfix, from userid 1002) id 8BEDE874306; Tue, 23 Oct 2012 14:32:14 +0200 (CEST) Received: from localhost.localdomain (unknown [192.168.77.1]) by paradis.irqsave.net (Postfix) with ESMTP id 649BD87430B; Tue, 23 Oct 2012 14:31:19 +0200 (CEST) From: =?UTF-8?q?Beno=C3=AEt=20Canet?= To: qemu-devel@nongnu.org Date: Tue, 23 Oct 2012 14:23:49 +0200 Message-Id: <1350995029-29128-12-git-send-email-benoit@irqsave.net> X-Mailer: git-send-email 1.7.10.4 In-Reply-To: <1350995029-29128-1-git-send-email-benoit@irqsave.net> References: <1350995029-29128-1-git-send-email-benoit@irqsave.net> X-detected-operating-system: by eggs.gnu.org: Genre and OS details not recognized. X-Received-From: 62.212.105.220 Cc: kwolf@redhat.com, pbonzini@redhat.com, =?UTF-8?q?Beno=C3=AEt=20Canet?= , stefanha@redhat.com Subject: [Qemu-devel] [PATCH 11/11] quorum: Add quorum_co_is_allocated. X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.14 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org Sender: qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org Signed-off-by: Benoit Canet --- block/quorum.c | 32 ++++++++++++++++++++++++++++++++ 1 file changed, 32 insertions(+) diff --git a/block/quorum.c b/block/quorum.c index 9550216..587796d 100644 --- a/block/quorum.c +++ b/block/quorum.c @@ -632,6 +632,37 @@ static void quorum_invalidate_cache(BlockDriverState *bs) } } +static int coroutine_fn quorum_co_is_allocated(BlockDriverState *bs, + int64_t sector_num, + int nb_sectors, + int *pnum) +{ + BDRVQuorumState *s = bs->opaque; + QuorumVoteVersion *winner = NULL; + QuorumVotes result_votes, num_votes; + int i, result, num; + + QLIST_INIT(&result_votes.vote_list); + QLIST_INIT(&num_votes.vote_list); + + for (i = 0; i < s->total; i++) { + result = bdrv_co_is_allocated(s->bs[i], sector_num, nb_sectors, &num); + quorum_count_vote(&result_votes, result, i); + quorum_count_vote(&num_votes, num, i); + } + + winner = quorum_get_vote_winner(&result_votes); + result = winner->value; + + winner = quorum_get_vote_winner(&num_votes); + *pnum = winner->value; + + quorum_free_vote_list(&result_votes); + quorum_free_vote_list(&num_votes); + + return result; +} + static BlockDriver bdrv_quorum = { .format_name = "quorum", .protocol_name = "quorum", @@ -647,6 +678,7 @@ static BlockDriver bdrv_quorum = { .bdrv_aio_readv = quorum_aio_readv, .bdrv_aio_writev = quorum_aio_writev, .bdrv_invalidate_cache = quorum_invalidate_cache, + .bdrv_co_is_allocated = quorum_co_is_allocated, }; static void bdrv_quorum_init(void)