From patchwork Mon Dec 17 23:16:38 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Paolo Bonzini X-Patchwork-Id: 10734489 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 38879924 for ; Mon, 17 Dec 2018 23:26:14 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 279B62A5E8 for ; Mon, 17 Dec 2018 23:26:14 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 1B7532A5EE; Mon, 17 Dec 2018 23:26:14 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-7.9 required=2.0 tests=BAYES_00,MAILING_LIST_MULTI, RCVD_IN_DNSWL_HI autolearn=ham version=3.3.1 Received: from lists.gnu.org (lists.gnu.org [208.118.235.17]) (using TLSv1 with cipher AES256-SHA (256/256 bits)) (No client certificate requested) by mail.wl.linuxfoundation.org (Postfix) with ESMTPS id C40352A5E8 for ; Mon, 17 Dec 2018 23:26:13 +0000 (UTC) Received: from localhost ([::1]:50496 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1gZ2H6-0007Ei-W8 for patchwork-qemu-devel@patchwork.kernel.org; Mon, 17 Dec 2018 18:26:13 -0500 Received: from eggs.gnu.org ([2001:4830:134:3::10]:43225) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1gZ28q-0000VT-6A for qemu-devel@nongnu.org; Mon, 17 Dec 2018 18:17:41 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1gZ28p-0003kn-B4 for qemu-devel@nongnu.org; Mon, 17 Dec 2018 18:17:40 -0500 Received: from mx1.redhat.com ([209.132.183.28]:60822) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1gZ28n-0003hx-5P for qemu-devel@nongnu.org; Mon, 17 Dec 2018 18:17:39 -0500 Received: from smtp.corp.redhat.com (int-mx04.intmail.prod.int.phx2.redhat.com [10.5.11.14]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id 54A1890902 for ; Mon, 17 Dec 2018 23:17:33 +0000 (UTC) Received: from donizetti.redhat.com (unknown [10.36.112.10]) by smtp.corp.redhat.com (Postfix) with ESMTP id EBDAB5D9C5; Mon, 17 Dec 2018 23:17:31 +0000 (UTC) From: Paolo Bonzini To: qemu-devel@nongnu.org Date: Tue, 18 Dec 2018 00:16:38 +0100 Message-Id: <20181217231700.24482-14-pbonzini@redhat.com> In-Reply-To: <20181217231700.24482-1-pbonzini@redhat.com> References: <20181217231700.24482-1-pbonzini@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.79 on 10.5.11.14 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.29]); Mon, 17 Dec 2018 23:17:33 +0000 (UTC) X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] [fuzzy] X-Received-From: 209.132.183.28 Subject: [Qemu-devel] [PULL 13/35] block/iscsi: take iscsilun->mutex in iscsi_timed_check_events() X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Stefan Hajnoczi Errors-To: qemu-devel-bounces+patchwork-qemu-devel=patchwork.kernel.org@nongnu.org Sender: "Qemu-devel" X-Virus-Scanned: ClamAV using ClamSMTP From: Stefan Hajnoczi Commit d045c466d9e62b4321fadf586d024d54ddfd8bd4 ("iscsi: do not use aio_context_acquire/release") introduced iscsilun->mutex but appears to have overlooked iscsi_timed_check_events() when introducing the mutex. iscsi_service() and iscsi_set_events() must be called with iscsilun->mutex held. iscsi_timed_check_events() is invoked from the AioContext and does not take the mutex. Signed-off-by: Stefan Hajnoczi Message-Id: <20180203061621.7033-3-stefanha@redhat.com> Reviewed-by: Paolo Bonzini Signed-off-by: Paolo Bonzini --- block/iscsi.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/block/iscsi.c b/block/iscsi.c index a4e3730a82..1924a2b58e 100644 --- a/block/iscsi.c +++ b/block/iscsi.c @@ -344,6 +344,8 @@ static void iscsi_timed_check_events(void *opaque) { IscsiLun *iscsilun = opaque; + qemu_mutex_lock(&iscsilun->mutex); + /* check for timed out requests */ iscsi_service(iscsilun->iscsi, 0); @@ -356,6 +358,8 @@ static void iscsi_timed_check_events(void *opaque) * to return to service once this situation changes. */ iscsi_set_events(iscsilun); + qemu_mutex_unlock(&iscsilun->mutex); + timer_mod(iscsilun->event_timer, qemu_clock_get_ms(QEMU_CLOCK_REALTIME) + EVENT_INTERVAL); }