From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:48618) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1WARQO-0008Lu-UF for qemu-devel@nongnu.org; Mon, 03 Feb 2014 16:51:33 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1WARQJ-0008JX-Lo for qemu-devel@nongnu.org; Mon, 03 Feb 2014 16:51:28 -0500 Received: from paradis.irqsave.net ([62.212.105.220]:49094) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1WARQJ-0008If-2B for qemu-devel@nongnu.org; Mon, 03 Feb 2014 16:51:23 -0500 From: =?UTF-8?q?Beno=C3=AEt=20Canet?= Date: Mon, 3 Feb 2014 22:51:16 +0100 Message-Id: <1391464280-25627-10-git-send-email-benoit.canet@irqsave.net> In-Reply-To: <1391464280-25627-1-git-send-email-benoit.canet@irqsave.net> References: <1391464280-25627-1-git-send-email-benoit.canet@irqsave.net> MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: quoted-printable Subject: [Qemu-devel] [PATCH V15 09/13] quorum: Add quorum_co_get_block_status. List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: qemu-devel@nongnu.org Cc: kwolf@redhat.com, =?UTF-8?q?Beno=C3=AEt=20Canet?= , stefanha@redhat.com, mreitz@redhat.com From: Beno=C3=AEt Canet Signed-off-by: Benoit Canet Reviewed-by: Max Reitz --- block/quorum.c | 51 +++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 51 insertions(+) diff --git a/block/quorum.c b/block/quorum.c index cef4424..677a96d 100644 --- a/block/quorum.c +++ b/block/quorum.c @@ -619,6 +619,56 @@ static void quorum_invalidate_cache(BlockDriverState= *bs) } } =20 +static int64_t coroutine_fn quorum_co_get_block_status(BlockDriverState = *bs, + int64_t sector_nu= m, + int nb_sectors, + int *pnum) +{ + BDRVQuorumState *s =3D bs->opaque; + QuorumVoteVersion *winner =3D NULL; + QuorumVotes result_votes, num_votes; + QuorumVoteValue result_value, num_value; + int i, num; + int64_t result =3D 0; + + QLIST_INIT(&result_votes.vote_list); + QLIST_INIT(&num_votes.vote_list); + result_votes.compare =3D quorum_64bits_compare; + num_votes.compare =3D quorum_64bits_compare; + + for (i =3D 0; i < s->total; i++) { + result =3D bdrv_get_block_status(s->bs[i], sector_num, nb_sector= s, &num); + /* skip failed requests */ + if (result < 0) { + continue; + } + result_value.l =3D result & BDRV_BLOCK_DATA; + num_value.l =3D num; + quorum_count_vote(&result_votes, &result_value, i); + quorum_count_vote(&num_votes, &num_value, i); + } + + winner =3D quorum_get_vote_winner(&result_votes); + if (winner->vote_count < s->threshold) { + result =3D -EIO; + goto free_exit; + } + result =3D winner->value.l; + + winner =3D quorum_get_vote_winner(&num_votes); + if (winner->vote_count < s->threshold) { + result =3D -EIO; + goto free_exit; + } + *pnum =3D winner->value.l; + +free_exit: + quorum_free_vote_list(&result_votes); + quorum_free_vote_list(&num_votes); + + return result; +} + static BlockDriver bdrv_quorum =3D { .format_name =3D "quorum", .protocol_name =3D "quorum", @@ -630,6 +680,7 @@ static BlockDriver bdrv_quorum =3D { .bdrv_aio_readv =3D quorum_aio_readv, .bdrv_aio_writev =3D quorum_aio_writev, .bdrv_invalidate_cache =3D quorum_invalidate_cache, + .bdrv_co_get_block_status =3D quorum_co_get_block_status, }; =20 static void bdrv_quorum_init(void) --=20 1.8.3.2