From nobody Tue Oct 28 04:13:15 2025 Delivered-To: importer@patchew.org Received-SPF: pass (zoho.com: domain of gnu.org designates 208.118.235.17 as permitted sender) client-ip=208.118.235.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Authentication-Results: mx.zohomail.com; spf=pass (zoho.com: domain of gnu.org designates 208.118.235.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org Return-Path: Received: from lists.gnu.org (lists.gnu.org [208.118.235.17]) by mx.zohomail.com with SMTPS id 1514271264101549.3556311756587; Mon, 25 Dec 2017 22:54:24 -0800 (PST) Received: from localhost ([::1]:56175 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1eTj7u-00044o-Kb for importer@patchew.org; Tue, 26 Dec 2017 01:54:14 -0500 Received: from eggs.gnu.org ([2001:4830:134:3::10]:50922) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1eTj6t-0003bN-DU for qemu-devel@nongnu.org; Tue, 26 Dec 2017 01:53:12 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1eTj6s-0004XC-Mg for qemu-devel@nongnu.org; Tue, 26 Dec 2017 01:53:11 -0500 Received: from mx1.redhat.com ([209.132.183.28]:33092) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1eTj6o-0004Uv-FY; Tue, 26 Dec 2017 01:53:06 -0500 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 mx1.redhat.com (Postfix) with ESMTPS id 4C217C0587C9; Tue, 26 Dec 2017 06:53:05 +0000 (UTC) Received: from lemon.redhat.com (ovpn-12-61.pek2.redhat.com [10.72.12.61]) by smtp.corp.redhat.com (Postfix) with ESMTP id 732E85D75C; Tue, 26 Dec 2017 06:53:01 +0000 (UTC) From: Fam Zheng To: qemu-devel@nongnu.org Date: Tue, 26 Dec 2017 14:53:00 +0800 Message-Id: <20171226065300.9890-1-famz@redhat.com> X-Scanned-By: MIMEDefang 2.79 on 10.5.11.15 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.32]); Tue, 26 Dec 2017 06:53:05 +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] [PATCH] osdep: Retry SETLK upon EINTR 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: kwolf@redhat.com, famz@redhat.com, qemu-stable@nongnu.org, qemu-block@nongnu.org Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" X-ZohoMail: RSF_0 Z_629925259 SPT_0 Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" We could hit lock failure if there is a signal that makes fcntl return -1 and errno set to EINTR. In this case we should retry. Cc: qemu-stable@nongnu.org Signed-off-by: Fam Zheng Reviewed-by: Eric Blake --- util/osdep.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/util/osdep.c b/util/osdep.c index 1231f9f876..a73de0e1ba 100644 --- a/util/osdep.c +++ b/util/osdep.c @@ -244,7 +244,9 @@ static int qemu_lock_fcntl(int fd, int64_t start, int64= _t len, int fl_type) .l_type =3D fl_type, }; qemu_probe_lock_ops(); - ret =3D fcntl(fd, fcntl_op_setlk, &fl); + do { + ret =3D fcntl(fd, fcntl_op_setlk, &fl); + } while (ret =3D=3D -1 && errno =3D=3D EINTR); return ret =3D=3D -1 ? -errno : 0; } =20 --=20 2.14.3