From patchwork Wed Jul 6 15:20:43 2016 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Kevin Wolf X-Patchwork-Id: 9216497 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id A3FA960752 for ; Wed, 6 Jul 2016 15:25:37 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 95D3826785 for ; Wed, 6 Jul 2016 15:25:37 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 89D6A2684F; Wed, 6 Jul 2016 15:25:37 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-6.9 required=2.0 tests=BAYES_00,RCVD_IN_DNSWL_HI autolearn=ham version=3.3.1 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.wl.linuxfoundation.org (Postfix) with ESMTPS id 387A726785 for ; Wed, 6 Jul 2016 15:25:37 +0000 (UTC) Received: from localhost ([::1]:34209 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1bKohk-0004aV-76 for patchwork-qemu-devel@patchwork.kernel.org; Wed, 06 Jul 2016 11:25:36 -0400 Received: from eggs.gnu.org ([2001:4830:134:3::10]:59638) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1bKodt-0000NK-NY for qemu-devel@nongnu.org; Wed, 06 Jul 2016 11:21:42 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1bKodo-0000q1-1w for qemu-devel@nongnu.org; Wed, 06 Jul 2016 11:21:36 -0400 Received: from mx1.redhat.com ([209.132.183.28]:58562) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1bKodc-0000kU-UA; Wed, 06 Jul 2016 11:21:21 -0400 Received: from int-mx14.intmail.prod.int.phx2.redhat.com (int-mx14.intmail.prod.int.phx2.redhat.com [10.5.11.27]) (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 94851C04B303; Wed, 6 Jul 2016 15:21:20 +0000 (UTC) Received: from noname.str.redhat.com. (dhcp-192-197.str.redhat.com [10.33.192.197]) by int-mx14.intmail.prod.int.phx2.redhat.com (8.14.4/8.14.4) with ESMTP id u66FLA1n000888; Wed, 6 Jul 2016 11:21:19 -0400 From: Kevin Wolf To: qemu-block@nongnu.org Date: Wed, 6 Jul 2016 17:20:43 +0200 Message-Id: <1467818447-2728-8-git-send-email-kwolf@redhat.com> In-Reply-To: <1467818447-2728-1-git-send-email-kwolf@redhat.com> References: <1467818447-2728-1-git-send-email-kwolf@redhat.com> X-Scanned-By: MIMEDefang 2.68 on 10.5.11.27 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.31]); Wed, 06 Jul 2016 15:21:20 +0000 (UTC) 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 v2 07/11] block: Accept node-name for change-backing-file 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: kwolf@redhat.com, qemu-devel@nongnu.org, mreitz@redhat.com Errors-To: qemu-devel-bounces+patchwork-qemu-devel=patchwork.kernel.org@nongnu.org Sender: "Qemu-devel" X-Virus-Scanned: ClamAV using ClamSMTP In order to remove the necessity to use BlockBackend names in the external API, we want to allow node-names everywhere. This converts change-backing-file to accept a node-name without lifting the restriction that we're operating at a root node. In case of an invalid device name, the command returns the GenericError error class now instead of DeviceNotFound, because this is what qmp_get_root_bs() returns. Signed-off-by: Kevin Wolf --- blockdev.c | 15 +++------------ 1 file changed, 3 insertions(+), 12 deletions(-) diff --git a/blockdev.c b/blockdev.c index 7a0890f..ca28ff7 100644 --- a/blockdev.c +++ b/blockdev.c @@ -3796,7 +3796,6 @@ void qmp_change_backing_file(const char *device, const char *backing_file, Error **errp) { - BlockBackend *blk; BlockDriverState *bs = NULL; AioContext *aio_context; BlockDriverState *image_bs = NULL; @@ -3805,22 +3804,14 @@ void qmp_change_backing_file(const char *device, int open_flags; int ret; - blk = blk_by_name(device); - if (!blk) { - error_set(errp, ERROR_CLASS_DEVICE_NOT_FOUND, - "Device '%s' not found", device); + bs = qmp_get_root_bs(device, errp); + if (!bs) { return; } - aio_context = blk_get_aio_context(blk); + aio_context = bdrv_get_aio_context(bs); aio_context_acquire(aio_context); - if (!blk_is_available(blk)) { - error_setg(errp, "Device '%s' has no medium", device); - goto out; - } - bs = blk_bs(blk); - image_bs = bdrv_lookup_bs(NULL, image_node_name, &local_err); if (local_err) { error_propagate(errp, local_err);