From patchwork Wed Apr 13 09:09:56 2016 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Fam Zheng X-Patchwork-Id: 8819721 Return-Path: X-Original-To: patchwork-qemu-devel@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork1.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.29.136]) by patchwork1.web.kernel.org (Postfix) with ESMTP id 44DD49F36E for ; Wed, 13 Apr 2016 09:10:57 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 9BCD82025A for ; Wed, 13 Apr 2016 09:10:56 +0000 (UTC) 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.kernel.org (Postfix) with ESMTPS id DCB4B201FE for ; Wed, 13 Apr 2016 09:10:54 +0000 (UTC) Received: from localhost ([::1]:39501 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1aqGp3-0006nj-Uq for patchwork-qemu-devel@patchwork.kernel.org; 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Wed, 13 Apr 2016 05:10:24 -0400 From: Fam Zheng To: qemu-devel@nongnu.org Date: Wed, 13 Apr 2016 17:09:56 +0800 Message-Id: <1460538604-12132-8-git-send-email-famz@redhat.com> In-Reply-To: <1460538604-12132-1-git-send-email-famz@redhat.com> References: <1460538604-12132-1-git-send-email-famz@redhat.com> X-Scanned-By: MIMEDefang 2.68 on 10.5.11.27 X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] X-Received-From: 209.132.183.28 Subject: [Qemu-devel] [PATCH for-2.7 07/15] qemu-io: Add "-L" option for BDRV_O_NO_LOCK 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: Kevin Wolf , qemu-block@nongnu.org, Jeff Cody , Markus Armbruster , Max Reitz , den@openvz.org, pbonzini@redhat.com, John Snow Errors-To: qemu-devel-bounces+patchwork-qemu-devel=patchwork.kernel.org@nongnu.org Sender: "Qemu-devel" X-Spam-Status: No, score=-6.9 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_HI, UNPARSEABLE_RELAY autolearn=unavailable version=3.3.1 X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP Signed-off-by: Fam Zheng --- qemu-io.c | 22 ++++++++++++++++++++-- 1 file changed, 20 insertions(+), 2 deletions(-) diff --git a/qemu-io.c b/qemu-io.c index 288bba8..6bb6232 100644 --- a/qemu-io.c +++ b/qemu-io.c @@ -107,6 +107,7 @@ static void open_help(void) " -r, -- open file read-only\n" " -s, -- use snapshot file\n" " -n, -- disable host cache\n" +" -L, -- disable image lock\n" " -o, -- options to be given to the block driver" "\n"); } @@ -139,12 +140,13 @@ static int open_f(BlockBackend *blk, int argc, char **argv) { int flags = 0; int readonly = 0; + int nolock = 0; bool writethrough = true; int c; QemuOpts *qopts; QDict *opts; - while ((c = getopt(argc, argv, "snrgo:")) != -1) { + while ((c = getopt(argc, argv, "snrgLo:")) != -1) { switch (c) { case 's': flags |= BDRV_O_SNAPSHOT; @@ -156,6 +158,9 @@ static int open_f(BlockBackend *blk, int argc, char **argv) case 'r': readonly = 1; break; + case 'L': + nolock = 1; + break; case 'o': if (imageOpts) { printf("--image-opts and 'open -o' are mutually exclusive\n"); @@ -176,6 +181,10 @@ static int open_f(BlockBackend *blk, int argc, char **argv) flags |= BDRV_O_RDWR; } + if (nolock) { + flags |= BDRV_O_NO_LOCK; + } + if (imageOpts && (optind == argc - 1)) { if (!qemu_opts_parse_noisily(&empty_opts, argv[optind], false)) { qemu_opts_reset(&empty_opts); @@ -410,7 +419,8 @@ static QemuOptsList file_opts = { int main(int argc, char **argv) { int readonly = 0; - const char *sopt = "hVc:d:f:rsnmgkt:T:"; + int nolock = 0; + const char *sopt = "hVc:d:f:rLsnmgkt:T:"; const struct option lopt[] = { { "help", no_argument, NULL, 'h' }, { "version", no_argument, NULL, 'V' }, @@ -418,6 +428,7 @@ int main(int argc, char **argv) { "cmd", required_argument, NULL, 'c' }, { "format", required_argument, NULL, 'f' }, { "read-only", no_argument, NULL, 'r' }, + { "no-lock", no_argument, NULL, 'L' }, { "snapshot", no_argument, NULL, 's' }, { "nocache", no_argument, NULL, 'n' }, { "misalign", no_argument, NULL, 'm' }, @@ -477,6 +488,9 @@ int main(int argc, char **argv) case 'r': readonly = 1; break; + case 'L': + nolock = 1; + break; case 'm': qemuio_misalign = true; break; @@ -558,6 +572,10 @@ int main(int argc, char **argv) flags |= BDRV_O_RDWR; } + if (nolock) { + flags |= BDRV_O_NO_LOCK; + } + if ((argc - optind) == 1) { if (imageOpts) { QemuOpts *qopts = NULL;