From patchwork Mon Mar 14 13:36:58 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: 12780163 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 44084C433EF for ; Mon, 14 Mar 2022 13:48:25 +0000 (UTC) Received: from localhost ([::1]:56986 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1nTl3g-0003gt-06 for qemu-devel@archiver.kernel.org; Mon, 14 Mar 2022 09:48:24 -0400 Received: from eggs.gnu.org ([209.51.188.92]:43024) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1nTkt9-0006r5-D8 for qemu-devel@nongnu.org; Mon, 14 Mar 2022 09:37:31 -0400 Received: from us-smtp-delivery-124.mimecast.com ([170.10.133.124]:27277) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1nTksy-0001bg-Ha for qemu-devel@nongnu.org; Mon, 14 Mar 2022 09:37:28 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1647265039; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=N6zcf9HlT+vVTOMe2Zk+e6Xm7QO8FGIoH/Sw/SadCNg=; b=FsZb4RAq1zFDCafpKV9SS+FdRD+Fw526kq1/Jb/YII5Do5DSO8VrlcgNOUUAJ3vnx+XAuQ DifQ44BxpkEbTUF0toEkXjp3ZG6KjWIEsYd32BOiY6fama9CqxuCEWq5tlatbQxC9vbbp/ x7gdFHooYzxcjMY6sCxDuIYLQW37t/s= Received: from mimecast-mx02.redhat.com (mx3-rdu2.redhat.com [66.187.233.73]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id us-mta-670-okddv8GkMhuJ1R0Zd3sTwg-1; Mon, 14 Mar 2022 09:37:16 -0400 X-MC-Unique: okddv8GkMhuJ1R0Zd3sTwg-1 Received: from smtp.corp.redhat.com (int-mx10.intmail.prod.int.rdu2.redhat.com [10.11.54.10]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx02.redhat.com (Postfix) with ESMTPS id 59C9629AB44A; Mon, 14 Mar 2022 13:37:16 +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 08F22403144; Mon, 14 Mar 2022 13:37:16 +0000 (UTC) From: Emanuele Giuseppe Esposito To: qemu-block@nongnu.org Subject: [PATCH v6 09/18] block/mirror.c: use of job helpers in drivers to avoid TOC/TOU Date: Mon, 14 Mar 2022 09:36:58 -0400 Message-Id: <20220314133707.2206082-10-eesposit@redhat.com> In-Reply-To: <20220314133707.2206082-1-eesposit@redhat.com> References: <20220314133707.2206082-1-eesposit@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.85 on 10.11.54.10 Authentication-Results: relay.mimecast.com; auth=pass smtp.auth=CUSA124A263 smtp.mailfrom=eesposit@redhat.com X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Received-SPF: pass client-ip=170.10.133.124; envelope-from=eesposit@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-Spam_score_int: -21 X-Spam_score: -2.2 X-Spam_bar: -- X-Spam_report: (-2.2 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.082, 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, SPF_HELO_NONE=0.001, SPF_PASS=-0.001, T_SCC_BODY_TEXT_LINE=-0.01 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: , Cc: Kevin Wolf , Fam Zheng , Vladimir Sementsov-Ogievskiy , Wen Congyang , Xie Changlong , Emanuele Giuseppe Esposito , Markus Armbruster , qemu-devel@nongnu.org, Hanna Reitz , Stefan Hajnoczi , Paolo Bonzini , John Snow Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" Once job lock is used and aiocontext is removed, mirror has to perform job operations under the same critical section, using the helpers prepared in previous commit. Note: at this stage, job_{lock/unlock} and job lock guard macros are *nop*. Signed-off-by: Emanuele Giuseppe Esposito Reviewed-by: Stefan Hajnoczi --- block/mirror.c | 19 ++++++++++++++----- 1 file changed, 14 insertions(+), 5 deletions(-) diff --git a/block/mirror.c b/block/mirror.c index ce6bc58d1f..b3b64a280a 100644 --- a/block/mirror.c +++ b/block/mirror.c @@ -653,9 +653,13 @@ static int mirror_exit_common(Job *job) BlockDriverState *target_bs; BlockDriverState *mirror_top_bs; Error *local_err = NULL; - bool abort = job->ret < 0; + bool abort; int ret = 0; + WITH_JOB_LOCK_GUARD() { + abort = job->ret < 0; + } + if (s->prepared) { return 0; } @@ -1151,8 +1155,10 @@ static void mirror_complete(Job *job, Error **errp) s->should_complete = true; /* If the job is paused, it will be re-entered when it is resumed */ - if (!job->paused) { - job_enter(job); + WITH_JOB_LOCK_GUARD() { + if (!job->paused) { + job_enter_cond(job, NULL); + } } } @@ -1172,8 +1178,11 @@ static bool mirror_drained_poll(BlockJob *job) * from one of our own drain sections, to avoid a deadlock waiting for * ourselves. */ - if (!s->common.job.paused && !job_is_cancelled(&job->job) && !s->in_drain) { - return true; + WITH_JOB_LOCK_GUARD() { + if (!s->common.job.paused && !job_is_cancelled_locked(&job->job) + && !s->in_drain) { + return true; + } } return !!s->in_flight;