From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:38716) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1WmdBJ-0006Iz-I2 for qemu-devel@nongnu.org; Tue, 20 May 2014 02:05:51 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1WmdBD-0001Tj-Bb for qemu-devel@nongnu.org; Tue, 20 May 2014 02:05:45 -0400 Received: from mx1.redhat.com ([209.132.183.28]:56284) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1WmdBD-0001Tc-3c for qemu-devel@nongnu.org; Tue, 20 May 2014 02:05:39 -0400 Received: from int-mx02.intmail.prod.int.phx2.redhat.com (int-mx02.intmail.prod.int.phx2.redhat.com [10.5.11.12]) by mx1.redhat.com (8.14.4/8.14.4) with ESMTP id s4K65cbD011260 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=OK) for ; Tue, 20 May 2014 02:05:38 -0400 From: Fam Zheng Date: Tue, 20 May 2014 14:04:37 +0800 Message-Id: <1400565880-13409-13-git-send-email-famz@redhat.com> In-Reply-To: <1400565880-13409-1-git-send-email-famz@redhat.com> References: <1400565880-13409-1-git-send-email-famz@redhat.com> Subject: [Qemu-devel] [PATCH v20 12/15] block: Allow backup on referenced named BlockDriverState List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: qemu-devel@nongnu.org Cc: kwolf@redhat.com, jcody@redhat.com, hbrock@redhat.com, rjones@redhat.com, armbru@redhat.com, imain@redhat.com, stefanha@redhat.com, pbonzini@redhat.com Drive backup is a read only operation on source bs. We want to allow this specific case to enable image-fleecing. Note that when image-fleecing job starts, the job still add its blocker to source bs, and any other operation on it will be blocked by that. Signed-off-by: Fam Zheng --- block.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/block.c b/block.c index e0d7984..2aebf45 100644 --- a/block.c +++ b/block.c @@ -1120,6 +1120,8 @@ void bdrv_set_backing_hd(BlockDriverState *bs, BlockDriverState *backing_hd) /* Otherwise we won't be able to commit due to check in bdrv_commit */ bdrv_op_unblock(bs->backing_hd, BLOCK_OP_TYPE_COMMIT, bs->backing_blocker); + bdrv_op_unblock(bs->backing_hd, BLOCK_OP_TYPE_BACKUP_SOURCE, + bs->backing_blocker); out: bdrv_refresh_limits(bs); } -- 1.9.2