From patchwork Wed Jul 7 16:58:10 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: 1501911 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Authentication-Results: ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=nongnu.org (client-ip=209.51.188.17; helo=lists.gnu.org; envelope-from=qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org; receiver=) Authentication-Results: ozlabs.org; dkim=fail reason="signature verification failed" (1024-bit key; unprotected) header.d=redhat.com header.i=@redhat.com header.a=rsa-sha256 header.s=mimecast20190719 header.b=GBZJn6Tk; dkim-atps=neutral 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 ozlabs.org (Postfix) with ESMTPS id 4GKm1N2xZvz9sRK for ; Thu, 8 Jul 2021 03:02:00 +1000 (AEST) Received: from localhost ([::1]:37618 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1m1Avu-0007Fk-4g for incoming@patchwork.ozlabs.org; Wed, 07 Jul 2021 13:01:58 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:41756) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1m1Asi-0002e1-6B for qemu-devel@nongnu.org; Wed, 07 Jul 2021 12:58:40 -0400 Received: from us-smtp-delivery-124.mimecast.com ([216.205.24.124]:56879) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1m1Asg-0000Cx-Cw for qemu-devel@nongnu.org; Wed, 07 Jul 2021 12:58:39 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1625677117; 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=W7TYMUwf6IpkICteKnmbomuPmxZgg9fNxbNqStYaMgg=; b=GBZJn6TkVOqfNLcV97kyZoMeITIC29ME5pTjck+MRuBJGEkCBdVgLGWT5T3zl+XZFu/NNp jPw/Xf3OT0W6LvBZMqUbgtfhsSyJ+ZUvFbfrT21tMN5+Zg3EZyUnnIUR2SrghF0LrQi3kG a2MUkrbrGJ+wvm+7JxmtP96diQ5V3ZU= 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-589-0fWQ8cgtMnuez65sQ6DtvQ-1; Wed, 07 Jul 2021 12:58:34 -0400 X-MC-Unique: 0fWQ8cgtMnuez65sQ6DtvQ-1 Received: from smtp.corp.redhat.com (int-mx07.intmail.prod.int.phx2.redhat.com [10.5.11.22]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx01.redhat.com (Postfix) with ESMTPS id 14740801107; Wed, 7 Jul 2021 16:58:33 +0000 (UTC) Received: from localhost.localdomain (ovpn-115-49.ams2.redhat.com [10.36.115.49]) by smtp.corp.redhat.com (Postfix) with ESMTP id 884E3100EB3D; Wed, 7 Jul 2021 16:58:30 +0000 (UTC) From: Emanuele Giuseppe Esposito To: qemu-block@nongnu.org Subject: [RFC PATCH 3/6] job: minor changes to simplify locking Date: Wed, 7 Jul 2021 18:58:10 +0200 Message-Id: <20210707165813.55361-4-eesposit@redhat.com> In-Reply-To: <20210707165813.55361-1-eesposit@redhat.com> References: <20210707165813.55361-1-eesposit@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.84 on 10.5.11.22 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: -41 X-Spam_score: -4.2 X-Spam_bar: ---- X-Spam_report: (-4.2 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-1.439, 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_H4=0.001, RCVD_IN_MSPIKE_WL=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: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Kevin Wolf , Emanuele Giuseppe Esposito , Vladimir Sementsov-Ogievskiy , qemu-devel@nongnu.org, Wen Congyang , Xie Changlong , Markus Armbruster , Max Reitz , Stefan Hajnoczi , Paolo Bonzini , John Snow Errors-To: qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org Sender: "Qemu-devel" Check for NULL id to job_get, so that in the next patch we can move job_get inside a single critical section of job_create. Also add missing notifier_list_init for the on_idle NotifierList, which seems to have been forgot. Signed-off-by: Emanuele Giuseppe Esposito --- job.c | 16 ++++++++++++---- 1 file changed, 12 insertions(+), 4 deletions(-) diff --git a/job.c b/job.c index 96fb8e9730..48b304c3ff 100644 --- a/job.c +++ b/job.c @@ -375,6 +375,10 @@ Job *job_get(const char *id) { Job *job; + if (!id) { + return NULL; + } + QLIST_FOREACH(job, &jobs, job_list) { if (job->id && !strcmp(id, job->id)) { return job; @@ -406,15 +410,18 @@ void *job_create(const char *job_id, const JobDriver *driver, JobTxn *txn, error_setg(errp, "Invalid job ID '%s'", job_id); return NULL; } - if (job_get(job_id)) { - error_setg(errp, "Job ID '%s' already in use", job_id); - return NULL; - } } else if (!(flags & JOB_INTERNAL)) { error_setg(errp, "An explicit job ID is required"); return NULL; } + job_lock(); + if (job_get(job_id)) { + error_setg(errp, "Job ID '%s' already in use", job_id); + job_unlock(); + return NULL; + } + job = g_malloc0(driver->instance_size); job->driver = driver; job->id = g_strdup(job_id); @@ -434,6 +441,7 @@ void *job_create(const char *job_id, const JobDriver *driver, JobTxn *txn, notifier_list_init(&job->on_finalize_completed); notifier_list_init(&job->on_pending); notifier_list_init(&job->on_ready); + notifier_list_init(&job->on_idle); job_state_transition(job, JOB_STATUS_CREATED); aio_timer_init(qemu_get_aio_context(), &job->sleep_timer,