From patchwork Wed Nov 16 13:48:41 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Emanuele Giuseppe Esposito X-Patchwork-Id: 13045233 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 0A61AC433FE for ; Wed, 16 Nov 2022 13:51:22 +0000 (UTC) Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1ovImw-0000kh-E1; Wed, 16 Nov 2022 08:49:14 -0500 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 1ovImr-0000gQ-R9 for qemu-devel@nongnu.org; Wed, 16 Nov 2022 08:49:11 -0500 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 1ovImk-00080g-Ei for qemu-devel@nongnu.org; Wed, 16 Nov 2022 08:49:09 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1668606539; 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=Mro4V6JNIQKqh1xbG4rtdd/lPqkptajad1lwxt70p2k=; b=iSV0RX6jPYB7n291azve8PH2yvHpCykDT8k9Cu6uuWcJlZsuYXk6/8GL2wNnK3IRtm+R/d BV7NRZGf0ZSj+SxN8WTAWxVIA7NtSv2wWuHuu+p2h3FxinuFkTg211b5KVdrsnJCGxI/oq n7z1fGhiAJxN5o7pqeXViRJtpig56TA= Received: from mimecast-mx02.redhat.com (mimecast-mx02.redhat.com [66.187.233.88]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id us-mta-529-33CxAhczMsee5qBMhDjQlg-1; Wed, 16 Nov 2022 08:48:56 -0500 X-MC-Unique: 33CxAhczMsee5qBMhDjQlg-1 Received: from smtp.corp.redhat.com (int-mx09.intmail.prod.int.rdu2.redhat.com [10.11.54.9]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx02.redhat.com (Postfix) with ESMTPS id 07F1F811E75; Wed, 16 Nov 2022 13:48:56 +0000 (UTC) Received: from virtlab701.virt.lab.eng.bos.redhat.com (virtlab701.virt.lab.eng.bos.redhat.com [10.19.152.228]) by smtp.corp.redhat.com (Postfix) with ESMTP id AEF7A4A9266; Wed, 16 Nov 2022 13:48:55 +0000 (UTC) From: Emanuele Giuseppe Esposito To: qemu-block@nongnu.org Cc: Kevin Wolf , Hanna Reitz , John Snow , Paolo Bonzini , Vladimir Sementsov-Ogievskiy , Stefan Hajnoczi , Fam Zheng , Eric Blake , Cleber Rosa , qemu-devel@nongnu.org, Emanuele Giuseppe Esposito Subject: [PATCH 11/20] block-gen: assert that bdrv_co_{check/invalidate_cache} are always called with graph rdlock taken Date: Wed, 16 Nov 2022 08:48:41 -0500 Message-Id: <20221116134850.3051419-12-eesposit@redhat.com> In-Reply-To: <20221116134850.3051419-1-eesposit@redhat.com> References: <20221116134850.3051419-1-eesposit@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 3.1 on 10.11.54.9 Received-SPF: pass client-ip=170.10.129.124; envelope-from=eesposit@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_H2=-0.001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=unavailable 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 The only callers of these functions are the respective generated_co_wrapper, and they already take the lock. Protecting bdrv_co_{check/invalidate_cache}() implies that BlockDriver->bdrv_co_{check/invalidate_cache}() is always called with graph rdlock taken. Signed-off-by: Emanuele Giuseppe Esposito --- block.c | 2 ++ include/block/block_int-common.h | 2 ++ 2 files changed, 4 insertions(+) diff --git a/block.c b/block.c index 1c870d85e6..c7611bed9e 100644 --- a/block.c +++ b/block.c @@ -5375,6 +5375,7 @@ int coroutine_fn bdrv_co_check(BlockDriverState *bs, BdrvCheckResult *res, BdrvCheckMode fix) { IO_CODE(); + assert_bdrv_graph_readable(); if (bs->drv == NULL) { return -ENOMEDIUM; } @@ -6590,6 +6591,7 @@ int coroutine_fn bdrv_co_invalidate_cache(BlockDriverState *bs, Error **errp) IO_CODE(); assert(!(bs->open_flags & BDRV_O_INACTIVE)); + assert_bdrv_graph_readable(); if (bs->drv->bdrv_co_invalidate_cache) { bs->drv->bdrv_co_invalidate_cache(bs, &local_err); diff --git a/include/block/block_int-common.h b/include/block/block_int-common.h index d666b0c441..f285a6b8f7 100644 --- a/include/block/block_int-common.h +++ b/include/block/block_int-common.h @@ -641,6 +641,7 @@ struct BlockDriver { /* * Invalidate any cached meta-data. + * Called with graph rdlock held. */ void coroutine_fn (*bdrv_co_invalidate_cache)(BlockDriverState *bs, Error **errp); @@ -726,6 +727,7 @@ struct BlockDriver { /* * Returns 0 for completed check, -errno for internal errors. * The check results are stored in result. + * Called with graph rdlock held. */ int coroutine_fn (*bdrv_co_check)(BlockDriverState *bs, BdrvCheckResult *result,