From nobody Thu May 15 22:49:10 2025 Delivered-To: importer@patchew.org Received-SPF: pass (zoho.com: domain of redhat.com designates 209.132.183.28 as permitted sender) client-ip=209.132.183.28; envelope-from=libvir-list-bounces@redhat.com; helo=mx1.redhat.com; Authentication-Results: mx.zohomail.com; spf=pass (zoho.com: domain of redhat.com designates 209.132.183.28 as permitted sender) smtp.mailfrom=libvir-list-bounces@redhat.com Return-Path: Received: from mx1.redhat.com (mx1.redhat.com [209.132.183.28]) by mx.zohomail.com with SMTPS id 1501545936636880.4936993736734; Mon, 31 Jul 2017 17:05:36 -0700 (PDT) Received: from smtp.corp.redhat.com (int-mx01.intmail.prod.int.phx2.redhat.com [10.5.11.11]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id 47C9BC0E4148; Tue, 1 Aug 2017 00:05:34 +0000 (UTC) Received: from colo-mx.corp.redhat.com (colo-mx02.intmail.prod.int.phx2.redhat.com [10.5.11.21]) by smtp.corp.redhat.com (Postfix) with ESMTPS id 1747160178; Tue, 1 Aug 2017 00:05:34 +0000 (UTC) Received: from lists01.pubmisc.prod.ext.phx2.redhat.com (lists01.pubmisc.prod.ext.phx2.redhat.com [10.5.19.33]) by colo-mx.corp.redhat.com (Postfix) with ESMTP id B43F114B24; Tue, 1 Aug 2017 00:05:33 +0000 (UTC) Received: from smtp.corp.redhat.com (int-mx06.intmail.prod.int.phx2.redhat.com [10.5.11.16]) by lists01.pubmisc.prod.ext.phx2.redhat.com (8.13.8/8.13.8) with ESMTP id v7105C5q013830 for ; Mon, 31 Jul 2017 20:05:12 -0400 Received: by smtp.corp.redhat.com (Postfix) id CC77C6376C; Tue, 1 Aug 2017 00:05:12 +0000 (UTC) Received: from localhost.localdomain.com (ovpn-117-46.phx2.redhat.com [10.3.117.46]) by smtp.corp.redhat.com (Postfix) with ESMTP id 91ABF63767 for ; Tue, 1 Aug 2017 00:05:12 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mx1.redhat.com 47C9BC0E4148 Authentication-Results: ext-mx08.extmail.prod.ext.phx2.redhat.com; dmarc=none (p=none dis=none) header.from=redhat.com Authentication-Results: ext-mx08.extmail.prod.ext.phx2.redhat.com; spf=fail smtp.mailfrom=libvir-list-bounces@redhat.com From: John Ferlan To: libvir-list@redhat.com Date: Mon, 31 Jul 2017 20:05:03 -0400 Message-Id: <20170801000508.14341-4-jferlan@redhat.com> In-Reply-To: <20170801000508.14341-1-jferlan@redhat.com> References: <20170801000508.14341-1-jferlan@redhat.com> X-Scanned-By: MIMEDefang 2.79 on 10.5.11.16 X-loop: libvir-list@redhat.com Subject: [libvirt] [PATCH v2 3/8] util: Only have virObjectLock handle virObjectLockable X-BeenThere: libvir-list@redhat.com X-Mailman-Version: 2.1.12 Precedence: junk List-Id: Development discussions about the libvirt library & tools List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Sender: libvir-list-bounces@redhat.com Errors-To: libvir-list-bounces@redhat.com X-Scanned-By: MIMEDefang 2.79 on 10.5.11.11 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.32]); Tue, 01 Aug 2017 00:05:35 +0000 (UTC) X-ZohoMail: RSF_0 Z_629925259 SPT_0 Content-Type: text/plain; charset="utf-8" Now that virObjectRWLockWrite exists to handle the virObjectRWLockable objects, let's restore virObjectLock to only handle virObjectLockable class locks. There still exists the possibility that the input @anyobj isn't a valid object and the resource isn't truly locked, but that also exists before commit id '77f4593b'. This also restores some logic that commit id '77f4593b' removed with respect to a common code path that commit id '10c2bb2b' had introduced as virObjectGetLockableObj. This code path merely does the same checks as the original virObjectLock commit 'b545f65d', but in callable/reusable helper to ensure the @obj at least has some validity before using. Signed-off-by: John Ferlan --- src/util/virobject.c | 37 +++++++++++++++++++++++-------------- 1 file changed, 23 insertions(+), 14 deletions(-) diff --git a/src/util/virobject.c b/src/util/virobject.c index f49af62..4903393 100644 --- a/src/util/virobject.c +++ b/src/util/virobject.c @@ -367,13 +367,28 @@ virObjectRef(void *anyobj) } =20 =20 +static virObjectLockablePtr +virObjectGetLockableObj(void *anyobj) +{ + virObjectPtr obj; + + if (virObjectIsClass(anyobj, virObjectLockableClass)) + return anyobj; + + obj =3D anyobj; + VIR_WARN("Object %p (%s) is not a virObjectLockable instance", + anyobj, obj ? obj->klass->name : "(unknown)"); + + return NULL; +} + + /** * virObjectLock: * @anyobj: any instance of virObjectLockable or virObjectRWLockable * * Acquire a lock on @anyobj. The lock must be released by - * virObjectUnlock. In case the passed object is instance of - * virObjectRWLockable a write lock is acquired. + * virObjectUnlock. * * The caller is expected to have acquired a reference * on the object before locking it (eg virObjectRef). @@ -383,18 +398,12 @@ virObjectRef(void *anyobj) void virObjectLock(void *anyobj) { - if (virObjectIsClass(anyobj, virObjectLockableClass)) { - virObjectLockablePtr obj =3D anyobj; - virMutexLock(&obj->lock); - } else if (virObjectIsClass(anyobj, virObjectRWLockableClass)) { - virObjectRWLockablePtr obj =3D anyobj; - virRWLockWrite(&obj->lock); - } else { - virObjectPtr obj =3D anyobj; - VIR_WARN("Object %p (%s) is not a virObjectLockable " - "nor virObjectRWLockable instance", - anyobj, obj ? obj->klass->name : "(unknown)"); - } + virObjectLockablePtr obj =3D virObjectGetLockableObj(anyobj); + + if (!obj) + return; + + virMutexLock(&obj->lock); } =20 =20 --=20 2.9.4 -- libvir-list mailing list libvir-list@redhat.com https://www.redhat.com/mailman/listinfo/libvir-list