From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id E1038C83F22 for ; Tue, 15 Jul 2025 19:39:06 +0000 (UTC) Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1ublRY-0007L4-MY; Tue, 15 Jul 2025 15:36:00 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1ubkxB-00048I-Iq for qemu-devel@nongnu.org; Tue, 15 Jul 2025 15:04:42 -0400 Received: from us-smtp-delivery-124.mimecast.com ([170.10.129.124]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1ubkx9-0001On-Jb for qemu-devel@nongnu.org; Tue, 15 Jul 2025 15:04:36 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1752606274; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=rEObCe5SI4WFqr30JFWEG6IuI2pn5Gii5i/TnHZnrbo=; b=idsRIJjOH8S4xL4/SO3fO8qUz1aG5Mqrt9tRxFTClw2MOjsC4gsvK6rPU1iTPoamPrEhzX dwzg/3D4MKMDu38/ZjP9+dKoCOz5WU5g9TEq3w70lXkTj/XPoTUVrcrZt++u3nhMwlcDQv 5j5v4hnbLDRNx8Uh6nKCmmjyavhiQeg= Received: from mx-prod-mc-01.mail-002.prod.us-west-2.aws.redhat.com (ec2-54-186-198-63.us-west-2.compute.amazonaws.com [54.186.198.63]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.3, cipher=TLS_AES_256_GCM_SHA384) id us-mta-9-b-OykTV4Pu6dBMbrr8-RaQ-1; Tue, 15 Jul 2025 15:04:32 -0400 X-MC-Unique: b-OykTV4Pu6dBMbrr8-RaQ-1 X-Mimecast-MFC-AGG-ID: b-OykTV4Pu6dBMbrr8-RaQ_1752606270 Received: from mx-prod-int-05.mail-002.prod.us-west-2.aws.redhat.com (mx-prod-int-05.mail-002.prod.us-west-2.aws.redhat.com [10.30.177.17]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits) server-digest SHA256) (No client certificate requested) by mx-prod-mc-01.mail-002.prod.us-west-2.aws.redhat.com (Postfix) with ESMTPS id A4C51195608E; Tue, 15 Jul 2025 19:04:30 +0000 (UTC) Received: from merkur.redhat.com (unknown [10.44.34.84]) by mx-prod-int-05.mail-002.prod.us-west-2.aws.redhat.com (Postfix) with ESMTP id 254D2197702B; Tue, 15 Jul 2025 19:04:28 +0000 (UTC) From: Kevin Wolf To: qemu-block@nongnu.org Cc: kwolf@redhat.com, stefanha@redhat.com, qemu-devel@nongnu.org Subject: [PULL 25/57] block: mark bdrv_open_child_common() and its callers GRAPH_UNLOCKED Date: Tue, 15 Jul 2025 21:02:58 +0200 Message-ID: <20250715190330.378764-26-kwolf@redhat.com> In-Reply-To: <20250715190330.378764-1-kwolf@redhat.com> References: <20250715190330.378764-1-kwolf@redhat.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Scanned-By: MIMEDefang 3.0 on 10.30.177.17 Received-SPF: pass client-ip=170.10.129.124; envelope-from=kwolf@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-Spam_score_int: -20 X-Spam_score: -2.1 X-Spam_bar: -- X-Spam_report: (-2.1 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.001, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_NONE=-0.0001, RCVD_IN_MSPIKE_H5=0.001, RCVD_IN_MSPIKE_WL=0.001, RCVD_IN_VALIDITY_RPBL_BLOCKED=0.001, RCVD_IN_VALIDITY_SAFE_BLOCKED=0.001, SPF_HELO_PASS=-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: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org From: Fiona Ebner The function bdrv_open_child_common() calls bdrv_graph_wrlock_drained(), which must be called with the graph unlocked. Mark it and its two callers bdrv_open_file_child() and bdrv_open_child() as GRAPH_UNLOCKED. This requires temporarily unlocking in vmdk_parse_extents() and making the locked section shorter in vmdk_open(). Signed-off-by: Fiona Ebner Message-ID: <20250530151125.955508-48-f.ebner@proxmox.com> Reviewed-by: Kevin Wolf Signed-off-by: Kevin Wolf --- include/block/block-global-state.h | 9 +++++---- block.c | 13 ++++++------- block/vmdk.c | 6 ++++-- 3 files changed, 15 insertions(+), 13 deletions(-) diff --git a/include/block/block-global-state.h b/include/block/block-global-state.h index e7c9acd2ba..62da83c616 100644 --- a/include/block/block-global-state.h +++ b/include/block/block-global-state.h @@ -81,7 +81,7 @@ bdrv_insert_node(BlockDriverState *bs, QDict *node_options, int flags, Error **errp); int bdrv_drop_filter(BlockDriverState *bs, Error **errp); -BdrvChild * no_coroutine_fn +BdrvChild * no_coroutine_fn GRAPH_UNLOCKED bdrv_open_child(const char *filename, QDict *options, const char *bdref_key, BlockDriverState *parent, const BdrvChildClass *child_class, BdrvChildRole child_role, bool allow_none, Error **errp); @@ -91,9 +91,10 @@ bdrv_co_open_child(const char *filename, QDict *options, const char *bdref_key, BlockDriverState *parent, const BdrvChildClass *child_class, BdrvChildRole child_role, bool allow_none, Error **errp); -int bdrv_open_file_child(const char *filename, - QDict *options, const char *bdref_key, - BlockDriverState *parent, Error **errp); +int GRAPH_UNLOCKED +bdrv_open_file_child(const char *filename, QDict *options, + const char *bdref_key, BlockDriverState *parent, + Error **errp); BlockDriverState * no_coroutine_fn bdrv_open_blockdev_ref(BlockdevRef *ref, Error **errp); diff --git a/block.c b/block.c index 8d3dd5a8e3..8848e9a7ed 100644 --- a/block.c +++ b/block.c @@ -3766,13 +3766,12 @@ done: return bs; } -static BdrvChild *bdrv_open_child_common(const char *filename, - QDict *options, const char *bdref_key, - BlockDriverState *parent, - const BdrvChildClass *child_class, - BdrvChildRole child_role, - bool allow_none, bool parse_filename, - Error **errp) +static BdrvChild * GRAPH_UNLOCKED +bdrv_open_child_common(const char *filename, QDict *options, + const char *bdref_key, BlockDriverState *parent, + const BdrvChildClass *child_class, + BdrvChildRole child_role, bool allow_none, + bool parse_filename, Error **errp) { BlockDriverState *bs; BdrvChild *child; diff --git a/block/vmdk.c b/block/vmdk.c index 04986c8d55..7b98debc2b 100644 --- a/block/vmdk.c +++ b/block/vmdk.c @@ -1229,9 +1229,11 @@ vmdk_parse_extents(const char *desc, BlockDriverState *bs, QDict *options, extent_role |= BDRV_CHILD_METADATA; } + bdrv_graph_rdunlock_main_loop(); extent_file = bdrv_open_child(extent_path, options, extent_opt_prefix, bs, &child_of_bds, extent_role, false, &local_err); + bdrv_graph_rdlock_main_loop(); g_free(extent_path); if (!extent_file) { error_propagate(errp, local_err); @@ -1352,13 +1354,13 @@ static int vmdk_open(BlockDriverState *bs, QDict *options, int flags, BDRVVmdkState *s = bs->opaque; uint32_t magic; - GRAPH_RDLOCK_GUARD_MAINLOOP(); - ret = bdrv_open_file_child(NULL, options, "file", bs, errp); if (ret < 0) { return ret; } + GRAPH_RDLOCK_GUARD_MAINLOOP(); + buf = vmdk_read_desc(bs->file, 0, errp); if (!buf) { return -EINVAL; -- 2.50.1