From nobody Tue Nov 18 02:53:49 2025 Delivered-To: importer@patchew.org Authentication-Results: mx.zohomail.com; spf=pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org; dmarc=pass(p=none dis=none) header.from=nongnu.org ARC-Seal: i=1; a=rsa-sha256; t=1606934025; cv=none; d=zohomail.com; s=zohoarc; b=LZrmfPX1mGIhsZrIremEIHGOE7GIKY31YSuToRFA4RZdKNuzPjDrJGgT04+bNJNpmlWuKvnMrJMkb6AGoLtGmeOxnpB6fLlm+igZSerSwrBN/sM4Ua5QKhU9ir+Z+P1gIRVyMOQrj4G0mQNmCEjNo6wd9JE4O0WHQ3PgN/5YiEg= ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=zohomail.com; s=zohoarc; t=1606934025; h=Cc:Date:From:In-Reply-To:List-Subscribe:List-Post:List-Id:List-Archive:List-Help:List-Unsubscribe:Message-ID:Reply-To:References:Sender:Subject:To; bh=CiehN0pdGjGuABl+GcAI87m3np+2rBLG/hu4c0nWGBw=; b=ZyMK0d6pjcMx4gzqmB3qSU73wyYajYPekpJSmrNEb4+5l2ClZhDIJ7vpaq2Xh6s7j4GIqQNsPyArLVgGhZc3oj5reQRVp88ggny5tzMY2tklPm2EAj/YgIQhajKZP6/+aTk8VNP2yERQDlWEALIbvgYbLPTfM8iH3TsRbQEopR8= ARC-Authentication-Results: i=1; mx.zohomail.com; spf=pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org; dmarc=pass header.from= (p=none dis=none) header.from= Return-Path: Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) by mx.zohomail.com with SMTPS id 1606934025977524.9442395736489; Wed, 2 Dec 2020 10:33:45 -0800 (PST) Received: from localhost ([::1]:45232 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1kkWwi-0004AZ-T2 for importer@patchew.org; Wed, 02 Dec 2020 13:33:44 -0500 Received: from eggs.gnu.org ([2001:470:142:3::10]:50300) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1kkWuJ-0001gQ-Lj; Wed, 02 Dec 2020 13:31:15 -0500 Received: from relay.sw.ru ([185.231.240.75]:49920 helo=relay3.sw.ru) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1kkWuB-000103-Cg; Wed, 02 Dec 2020 13:31:15 -0500 Received: from [172.16.25.136] (helo=localhost.sw.ru) by relay3.sw.ru with esmtp (Exim 4.94) (envelope-from ) id 1kkWtu-00BTPZ-9B; Wed, 02 Dec 2020 21:30:50 +0300 To: qemu-block@nongnu.org Cc: qemu-devel@nongnu.org, kwolf@redhat.com, mreitz@redhat.com, stefanha@redhat.com, fam@euphon.net, armbru@redhat.com, jsnow@redhat.com, eblake@redhat.com, den@openvz.org, vsementsov@virtuozzo.com, andrey.shinkevich@virtuozzo.com Subject: [PATCH v13 02/10] block: add API function to insert a node Date: Wed, 2 Dec 2020 21:30:53 +0300 Message-Id: <1606933861-297777-3-git-send-email-andrey.shinkevich@virtuozzo.com> X-Mailer: git-send-email 1.8.3.1 In-Reply-To: <1606933861-297777-1-git-send-email-andrey.shinkevich@virtuozzo.com> References: <1606933861-297777-1-git-send-email-andrey.shinkevich@virtuozzo.com> Received-SPF: pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) client-ip=209.51.188.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Received-SPF: pass client-ip=185.231.240.75; envelope-from=andrey.shinkevich@virtuozzo.com; helo=relay3.sw.ru X-Spam_score_int: -18 X-Spam_score: -1.9 X-Spam_bar: - X-Spam_report: (-1.9 / 5.0 requ) BAYES_00=-1.9, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" Reply-to: Andrey Shinkevich From: Andrey Shinkevich via Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Provide API for insertion a node to backing chain. Suggested-by: Max Reitz Signed-off-by: Andrey Shinkevich Reviewed-by: Vladimir Sementsov-Ogievskiy --- block.c | 25 +++++++++++++++++++++++++ include/block/block.h | 2 ++ 2 files changed, 27 insertions(+) diff --git a/block.c b/block.c index f1cedac..b71c39f 100644 --- a/block.c +++ b/block.c @@ -4698,6 +4698,31 @@ static void bdrv_delete(BlockDriverState *bs) g_free(bs); } =20 +BlockDriverState *bdrv_insert_node(BlockDriverState *bs, QDict *node_optio= ns, + int flags, Error **errp) +{ + BlockDriverState *new_node_bs; + Error *local_err =3D NULL; + + new_node_bs =3D bdrv_open(NULL, NULL, node_options, flags, errp); + if (new_node_bs =3D=3D NULL) { + error_prepend(errp, "Could not create node: "); + return NULL; + } + + bdrv_drained_begin(bs); + bdrv_replace_node(bs, new_node_bs, &local_err); + bdrv_drained_end(bs); + + if (local_err) { + bdrv_unref(new_node_bs); + error_propagate(errp, local_err); + return NULL; + } + + return new_node_bs; +} + /* * Run consistency checks on an image * diff --git a/include/block/block.h b/include/block/block.h index c9d7c58..81a3894 100644 --- a/include/block/block.h +++ b/include/block/block.h @@ -350,6 +350,8 @@ void bdrv_append(BlockDriverState *bs_new, BlockDriverS= tate *bs_top, Error **errp); void bdrv_replace_node(BlockDriverState *from, BlockDriverState *to, Error **errp); +BlockDriverState *bdrv_insert_node(BlockDriverState *bs, QDict *node_optio= ns, + int flags, Error **errp); =20 int bdrv_parse_aio(const char *mode, int *flags); int bdrv_parse_cache_mode(const char *mode, int *flags, bool *writethrough= ); --=20 1.8.3.1