From patchwork Thu Nov 4 14:53:22 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Emanuele Giuseppe Esposito X-Patchwork-Id: 12603305 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 mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 3F539C433EF for ; Thu, 4 Nov 2021 14:56:25 +0000 (UTC) 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 mail.kernel.org (Postfix) with ESMTPS id BAE81611C3 for ; Thu, 4 Nov 2021 14:56:24 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.4.1 mail.kernel.org BAE81611C3 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=redhat.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=nongnu.org Received: from localhost ([::1]:48454 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1mieAB-0006RZ-Uf for qemu-devel@archiver.kernel.org; Thu, 04 Nov 2021 10:56:23 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:51148) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1mie7x-000310-Q1 for qemu-devel@nongnu.org; Thu, 04 Nov 2021 10:54:05 -0400 Received: from us-smtp-delivery-124.mimecast.com ([216.205.24.124]:40745) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1mie7v-0006qo-MA for qemu-devel@nongnu.org; Thu, 04 Nov 2021 10:54:05 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1636037642; 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=WYVci7NHvihvWLwY3IHTnWLxXIfASM5N3xFOBb34Jmw=; b=Q5ItpYsYYrTJEo6ZgtvquKuBJEXIybLSXB55ySvC0MF8R0BuxWuvMWtGcmKWZyWvxSunWi NDMlBuulKmizv7GcvHT0F87CtgP8pn3DtTt7xW8kAh+3Pg34j/sFX06Asn/7WvM8u5BYEd GZG2iRnIZE8sakuDzdchiAxh3CgE4cs= Received: from mimecast-mx01.redhat.com (mimecast-mx01.redhat.com [209.132.183.4]) (Using TLS) by relay.mimecast.com with ESMTP id us-mta-429-2wkGjFs8MUq0ncpaRbIMJQ-1; Thu, 04 Nov 2021 10:53:59 -0400 X-MC-Unique: 2wkGjFs8MUq0ncpaRbIMJQ-1 Received: from smtp.corp.redhat.com (int-mx05.intmail.prod.int.phx2.redhat.com [10.5.11.15]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx01.redhat.com (Postfix) with ESMTPS id E35AD1007932; Thu, 4 Nov 2021 14:53:52 +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 ED32656A83; Thu, 4 Nov 2021 14:53:51 +0000 (UTC) From: Emanuele Giuseppe Esposito To: qemu-block@nongnu.org Subject: [RFC PATCH v2 02/14] job.h: categorize fields in struct Job Date: Thu, 4 Nov 2021 10:53:22 -0400 Message-Id: <20211104145334.1346363-3-eesposit@redhat.com> In-Reply-To: <20211104145334.1346363-1-eesposit@redhat.com> References: <20211104145334.1346363-1-eesposit@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.79 on 10.5.11.15 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=216.205.24.124; envelope-from=eesposit@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-Spam_score_int: -33 X-Spam_score: -3.4 X-Spam_bar: --- X-Spam_report: (-3.4 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.648, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_LOW=-0.7, RCVD_IN_MSPIKE_H2=-0.001, 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: 2.1.29 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" Categorize the fields in struct Job to understand which ones need to be protected by the job mutex and which don't. Signed-off-by: Emanuele Giuseppe Esposito --- include/qemu/job.h | 57 +++++++++++++++++++++++++++------------------- 1 file changed, 34 insertions(+), 23 deletions(-) diff --git a/include/qemu/job.h b/include/qemu/job.h index ccf7826426..f7036ac6b3 100644 --- a/include/qemu/job.h +++ b/include/qemu/job.h @@ -40,27 +40,52 @@ typedef struct JobTxn JobTxn; * Long-running operation. */ typedef struct Job { + + /* Fields set at initialization (job_create), and never modified */ + /** The ID of the job. May be NULL for internal jobs. */ char *id; - /** The type of this job. */ + /** + * The type of this job. + * All callbacks are called with job_mutex *not* held. + */ const JobDriver *driver; - /** Reference count of the block job */ - int refcnt; - - /** Current state; See @JobStatus for details. */ - JobStatus status; - /** AioContext to run the job coroutine in */ AioContext *aio_context; /** * The coroutine that executes the job. If not NULL, it is reentered when * busy is false and the job is cancelled. + * Initialized in job_start() */ Coroutine *co; + /** True if this job should automatically finalize itself */ + bool auto_finalize; + + /** True if this job should automatically dismiss itself */ + bool auto_dismiss; + + /** The completion function that will be called when the job completes. */ + BlockCompletionFunc *cb; + + /** The opaque value that is passed to the completion function. */ + void *opaque; + + /* ProgressMeter API is thread-safe */ + ProgressMeter progress; + + + /** Protected by job_mutex */ + + /** Reference count of the block job */ + int refcnt; + + /** Current state; See @JobStatus for details. */ + JobStatus status; + /** * Timer that is used by @job_sleep_ns. Accessed under job_mutex (in * job.c). @@ -76,7 +101,7 @@ typedef struct Job { /** * Set to false by the job while the coroutine has yielded and may be * re-entered by job_enter(). There may still be I/O or event loop activity - * pending. Accessed under block_job_mutex (in blockjob.c). + * pending. Accessed under job_mutex. * * When the job is deferred to the main loop, busy is true as long as the * bottom half is still pending. @@ -112,14 +137,6 @@ typedef struct Job { /** Set to true when the job has deferred work to the main loop. */ bool deferred_to_main_loop; - /** True if this job should automatically finalize itself */ - bool auto_finalize; - - /** True if this job should automatically dismiss itself */ - bool auto_dismiss; - - ProgressMeter progress; - /** * Return code from @run and/or @prepare callback(s). * Not final until the job has reached the CONCLUDED status. @@ -134,12 +151,6 @@ typedef struct Job { */ Error *err; - /** The completion function that will be called when the job completes. */ - BlockCompletionFunc *cb; - - /** The opaque value that is passed to the completion function. */ - void *opaque; - /** Notifiers called when a cancelled job is finalised */ NotifierList on_finalize_cancelled; @@ -167,6 +178,7 @@ typedef struct Job { /** * Callbacks and other information about a Job driver. + * All callbacks are invoked with job_mutex *not* held. */ struct JobDriver { @@ -460,7 +472,6 @@ void job_yield(Job *job); */ void coroutine_fn job_sleep_ns(Job *job, int64_t ns); - /** Returns the JobType of a given Job. */ JobType job_type(const Job *job);