From patchwork Thu Jul 7 12:11:33 2016 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Kevin Wolf X-Patchwork-Id: 9218861 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 C042D60574 for ; Thu, 7 Jul 2016 12:17:06 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id B16AC288CE for ; Thu, 7 Jul 2016 12:17:06 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id A2F26288D1; Thu, 7 Jul 2016 12:17:06 +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 430A4288CB for ; Thu, 7 Jul 2016 12:17:06 +0000 (UTC) Received: from localhost ([::1]:39481 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1bL8Eq-00066y-Lr for patchwork-qemu-devel@patchwork.kernel.org; Thu, 07 Jul 2016 08:17:04 -0400 Received: from eggs.gnu.org ([2001:4830:134:3::10]:42008) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1bL8A6-0008UH-FH for qemu-devel@nongnu.org; Thu, 07 Jul 2016 08:12:11 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1bL8A5-00069a-Eu for qemu-devel@nongnu.org; Thu, 07 Jul 2016 08:12:10 -0400 Received: from mx1.redhat.com ([209.132.183.28]:58744) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1bL89y-000678-U3; Thu, 07 Jul 2016 08:12:03 -0400 Received: from int-mx13.intmail.prod.int.phx2.redhat.com (int-mx13.intmail.prod.int.phx2.redhat.com [10.5.11.26]) (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 98DB6C0467C8; Thu, 7 Jul 2016 12:12:02 +0000 (UTC) Received: from noname.redhat.com (ovpn-204-113.brq.redhat.com [10.40.204.113]) by int-mx13.intmail.prod.int.phx2.redhat.com (8.14.4/8.14.4) with ESMTP id u67CBgme015882; Thu, 7 Jul 2016 08:12:01 -0400 From: Kevin Wolf To: qemu-block@nongnu.org Date: Thu, 7 Jul 2016 14:11:33 +0200 Message-Id: <1467893497-2434-8-git-send-email-kwolf@redhat.com> In-Reply-To: <1467893497-2434-1-git-send-email-kwolf@redhat.com> References: <1467893497-2434-1-git-send-email-kwolf@redhat.com> X-Scanned-By: MIMEDefang 2.68 on 10.5.11.26 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.31]); Thu, 07 Jul 2016 12:12:02 +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 v3 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 +++------------ qapi/block-core.json | 3 ++- qmp-commands.hx | 3 ++- 3 files changed, 7 insertions(+), 14 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); diff --git a/qapi/block-core.json b/qapi/block-core.json index a64b598..6ab3c91 100644 --- a/qapi/block-core.json +++ b/qapi/block-core.json @@ -985,7 +985,8 @@ # @image-node-name: The name of the block driver state node of the # image to modify. # -# @device: The name of the device that owns image-node-name. +# @device: The device name or node-name of the root node that owns +# image-node-name. # # @backing-file: The string to write as the backing file. This # string is not validated, so care should be taken diff --git a/qmp-commands.hx b/qmp-commands.hx index 4aebb32..e15bcf5 100644 --- a/qmp-commands.hx +++ b/qmp-commands.hx @@ -1794,7 +1794,8 @@ Arguments: "device". (json-string, optional) -- "device": The name of the device. +- "device": The device name or node-name of the root node that owns + image-node-name. (json-string) - "backing-file": The string to write as the backing file. This string is