From patchwork Fri Apr 15 03:27:56 2016 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Fam Zheng X-Patchwork-Id: 8844601 Return-Path: X-Original-To: patchwork-qemu-devel@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork2.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.29.136]) by patchwork2.web.kernel.org (Postfix) with ESMTP id DF7FAC0553 for ; Fri, 15 Apr 2016 03:34:27 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 453E020374 for ; Fri, 15 Apr 2016 03:34:27 +0000 (UTC) Received: from lists.gnu.org (lists.gnu.org [208.118.235.17]) (using TLSv1 with cipher AES256-SHA (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 8DBCA20373 for ; Fri, 15 Apr 2016 03:34:26 +0000 (UTC) Received: from localhost ([::1]:52876 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1aquWX-0007nf-Vu for patchwork-qemu-devel@patchwork.kernel.org; Thu, 14 Apr 2016 23:34:25 -0400 Received: from eggs.gnu.org ([2001:4830:134:3::10]:54090) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1aquQs-0004SI-4H for qemu-devel@nongnu.org; Thu, 14 Apr 2016 23:28:35 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1aquQq-00034y-QG for qemu-devel@nongnu.org; Thu, 14 Apr 2016 23:28:34 -0400 Received: from mx1.redhat.com ([209.132.183.28]:36610) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1aquQo-00033b-JM; Thu, 14 Apr 2016 23:28:30 -0400 Received: from int-mx11.intmail.prod.int.phx2.redhat.com (int-mx11.intmail.prod.int.phx2.redhat.com [10.5.11.24]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id 0ABCA7822B; Fri, 15 Apr 2016 03:28:27 +0000 (UTC) Received: from lemon.nay.redhat.com (dhcp-14-170.nay.redhat.com [10.66.14.170]) by int-mx11.intmail.prod.int.phx2.redhat.com (8.14.4/8.14.4) with ESMTP id u3F3S2RP008188; Thu, 14 Apr 2016 23:28:23 -0400 From: Fam Zheng To: qemu-devel@nongnu.org Date: Fri, 15 Apr 2016 11:27:56 +0800 Message-Id: <1460690887-32751-7-git-send-email-famz@redhat.com> In-Reply-To: <1460690887-32751-1-git-send-email-famz@redhat.com> References: <1460690887-32751-1-git-send-email-famz@redhat.com> X-Scanned-By: MIMEDefang 2.68 on 10.5.11.24 X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] X-Received-From: 209.132.183.28 Subject: [Qemu-devel] [PATCH for-2.7 v2 06/17] gluster: Implement .bdrv_lockf X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Kevin Wolf , qemu-block@nongnu.org, Jeff Cody , Markus Armbruster , Max Reitz , den@openvz.org, pbonzini@redhat.com, John Snow Errors-To: qemu-devel-bounces+patchwork-qemu-devel=patchwork.kernel.org@nongnu.org Sender: "Qemu-devel" X-Spam-Status: No, score=-6.9 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_HI, UNPARSEABLE_RELAY autolearn=unavailable version=3.3.1 X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP Signed-off-by: Fam Zheng Reviewed-by: Niels de Vos --- block/gluster.c | 30 ++++++++++++++++++++++++++++++ 1 file changed, 30 insertions(+) diff --git a/block/gluster.c b/block/gluster.c index 51e154c..c23e944 100644 --- a/block/gluster.c +++ b/block/gluster.c @@ -672,6 +672,32 @@ static void qemu_gluster_close(BlockDriverState *bs) glfs_fini(s->glfs); } +static int qemu_gluster_lockf(BlockDriverState *bs, BdrvLockfCmd cmd) +{ + BDRVGlusterState *s = bs->opaque; + int ret; + struct flock fl = (struct flock) { + .l_start = 0, + .l_whence = SEEK_SET, + .l_len = 0, + }; + switch (cmd) { + case BDRV_LOCKF_RWLOCK: + fl.l_type = F_WRLCK; + break; + case BDRV_LOCKF_ROLOCK: + fl.l_type = F_RDLCK; + break; + case BDRV_LOCKF_UNLOCK: + fl.l_type = F_UNLCK; + break; + default: + abort(); + } + ret = glfs_posix_lock(s->fd, F_SETLK, &fl); + return ret == -1 ? -errno : 0; +} + static int qemu_gluster_has_zero_init(BlockDriverState *bs) { /* GlusterFS volume could be backed by a block device */ @@ -713,6 +739,7 @@ static BlockDriver bdrv_gluster = { .bdrv_co_readv = qemu_gluster_co_readv, .bdrv_co_writev = qemu_gluster_co_writev, .bdrv_co_flush_to_disk = qemu_gluster_co_flush_to_disk, + .bdrv_lockf = qemu_gluster_lockf, .bdrv_has_zero_init = qemu_gluster_has_zero_init, #ifdef CONFIG_GLUSTERFS_DISCARD .bdrv_co_discard = qemu_gluster_co_discard, @@ -740,6 +767,7 @@ static BlockDriver bdrv_gluster_tcp = { .bdrv_co_readv = qemu_gluster_co_readv, .bdrv_co_writev = qemu_gluster_co_writev, .bdrv_co_flush_to_disk = qemu_gluster_co_flush_to_disk, + .bdrv_lockf = qemu_gluster_lockf, .bdrv_has_zero_init = qemu_gluster_has_zero_init, #ifdef CONFIG_GLUSTERFS_DISCARD .bdrv_co_discard = qemu_gluster_co_discard, @@ -767,6 +795,7 @@ static BlockDriver bdrv_gluster_unix = { .bdrv_co_readv = qemu_gluster_co_readv, .bdrv_co_writev = qemu_gluster_co_writev, .bdrv_co_flush_to_disk = qemu_gluster_co_flush_to_disk, + .bdrv_lockf = qemu_gluster_lockf, .bdrv_has_zero_init = qemu_gluster_has_zero_init, #ifdef CONFIG_GLUSTERFS_DISCARD .bdrv_co_discard = qemu_gluster_co_discard, @@ -794,6 +823,7 @@ static BlockDriver bdrv_gluster_rdma = { .bdrv_co_readv = qemu_gluster_co_readv, .bdrv_co_writev = qemu_gluster_co_writev, .bdrv_co_flush_to_disk = qemu_gluster_co_flush_to_disk, + .bdrv_lockf = qemu_gluster_lockf, .bdrv_has_zero_init = qemu_gluster_has_zero_init, #ifdef CONFIG_GLUSTERFS_DISCARD .bdrv_co_discard = qemu_gluster_co_discard,