From patchwork Thu Feb 4 13:50:08 2016 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: =?utf-8?q?Daniel_P=2E_Berrang=C3=A9?= X-Patchwork-Id: 8221711 Return-Path: X-Original-To: patchwork-qemu-devel@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork2.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.29.136]) by patchwork2.web.kernel.org (Postfix) with ESMTP id 0C67BBEEE5 for ; Thu, 4 Feb 2016 13:53:09 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 511602034C for ; Thu, 4 Feb 2016 13:53:08 +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 8089D201CD for ; Thu, 4 Feb 2016 13:53:07 +0000 (UTC) Received: from localhost ([::1]:41911 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1aRKLK-0006um-UI for patchwork-qemu-devel@patchwork.kernel.org; Thu, 04 Feb 2016 08:53:06 -0500 Received: from eggs.gnu.org ([2001:4830:134:3::10]:35766) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1aRKIw-0003M9-EN for qemu-devel@nongnu.org; Thu, 04 Feb 2016 08:50:43 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1aRKIu-00036T-FO for qemu-devel@nongnu.org; Thu, 04 Feb 2016 08:50:38 -0500 Received: from mx1.redhat.com ([209.132.183.28]:48819) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1aRKIt-00035p-Rb for qemu-devel@nongnu.org; Thu, 04 Feb 2016 08:50:36 -0500 Received: from int-mx09.intmail.prod.int.phx2.redhat.com (int-mx09.intmail.prod.int.phx2.redhat.com [10.5.11.22]) by mx1.redhat.com (Postfix) with ESMTPS id 7529E8051C for ; Thu, 4 Feb 2016 13:50:35 +0000 (UTC) Received: from t530wlan.home.berrange.com.com (vpn1-6-8.ams2.redhat.com [10.36.6.8]) by int-mx09.intmail.prod.int.phx2.redhat.com (8.14.4/8.14.4) with ESMTP id u14DoTEI028626; Thu, 4 Feb 2016 08:50:34 -0500 From: "Daniel P. Berrange" To: qemu-devel@nongnu.org Date: Thu, 4 Feb 2016 13:50:08 +0000 Message-Id: <1454593822-7321-3-git-send-email-berrange@redhat.com> In-Reply-To: <1454593822-7321-1-git-send-email-berrange@redhat.com> References: <1454593822-7321-1-git-send-email-berrange@redhat.com> X-Scanned-By: MIMEDefang 2.68 on 10.5.11.22 X-detected-operating-system: by eggs.gnu.org: GNU/Linux 3.x X-Received-From: 209.132.183.28 Cc: Kevin Wolf , Paolo Bonzini , Max Reitz Subject: [Qemu-devel] [PATCH v5 02/16] qemu-nbd: add support for --object command line arg X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.14 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+patchwork-qemu-devel=patchwork.kernel.org@nongnu.org Sender: qemu-devel-bounces+patchwork-qemu-devel=patchwork.kernel.org@nongnu.org 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 Allow creation of user creatable object types with qemu-nbd via a new --object command line arg. This will be used to supply passwords and/or encryption keys to the various block driver backends via the recently added 'secret' object type. # printf letmein > mypasswd.txt # qemu-nbd --object secret,id=sec0,file=mypasswd.txt \ ...other nbd args... Reviewed-by: Eric Blake Signed-off-by: Daniel P. Berrange --- qemu-nbd.c | 34 ++++++++++++++++++++++++++++++++++ qemu-nbd.texi | 6 ++++++ 2 files changed, 40 insertions(+) diff --git a/qemu-nbd.c b/qemu-nbd.c index ede4a54..0e019c1 100644 --- a/qemu-nbd.c +++ b/qemu-nbd.c @@ -23,9 +23,11 @@ #include "qemu/main-loop.h" #include "qemu/sockets.h" #include "qemu/error-report.h" +#include "qemu/config-file.h" #include "block/snapshot.h" #include "qapi/util.h" #include "qapi/qmp/qstring.h" +#include "qom/object_interfaces.h" #include #include @@ -44,6 +46,7 @@ #define QEMU_NBD_OPT_AIO 2 #define QEMU_NBD_OPT_DISCARD 3 #define QEMU_NBD_OPT_DETECT_ZEROES 4 +#define QEMU_NBD_OPT_OBJECT 5 static NBDExport *exp; static int verbose; @@ -77,6 +80,9 @@ static void usage(const char *name) " -o, --offset=OFFSET offset into the image\n" " -P, --partition=NUM only expose partition NUM\n" "\n" +"General purpose options:\n" +" --object type,id=ID,... define an object such as 'secret' for providing\n" +" passwords and/or encryption keys\n" #ifdef __linux__ "Kernel NBD client support:\n" " -c, --connect=DEV connect FILE to the local NBD device DEV\n" @@ -374,6 +380,16 @@ static SocketAddress *nbd_build_socket_address(const char *sockpath, } +static QemuOptsList qemu_object_opts = { + .name = "object", + .implied_opt_name = "qom-type", + .head = QTAILQ_HEAD_INITIALIZER(qemu_object_opts.head), + .desc = { + { } + }, +}; + + int main(int argc, char **argv) { BlockBackend *blk; @@ -411,6 +427,7 @@ int main(int argc, char **argv) { "format", 1, NULL, 'f' }, { "persistent", 0, NULL, 't' }, { "verbose", 0, NULL, 'v' }, + { "object", 1, NULL, QEMU_NBD_OPT_OBJECT }, { NULL, 0, NULL, 0 } }; int ch; @@ -436,6 +453,8 @@ int main(int argc, char **argv) memset(&sa_sigterm, 0, sizeof(sa_sigterm)); sa_sigterm.sa_handler = termsig_handler; sigaction(SIGTERM, &sa_sigterm, NULL); + module_call_init(MODULE_INIT_QOM); + qemu_add_opts(&qemu_object_opts); qemu_init_exec_dir(argv[0]); while ((ch = getopt_long(argc, argv, sopt, lopt, &opt_ind)) != -1) { @@ -591,6 +610,14 @@ int main(int argc, char **argv) case '?': error_report("Try `%s --help' for more information.", argv[0]); exit(EXIT_FAILURE); + case QEMU_NBD_OPT_OBJECT: { + QemuOpts *opts; + opts = qemu_opts_parse_noisily(&qemu_object_opts, + optarg, true); + if (!opts) { + exit(EXIT_FAILURE); + } + } break; } } @@ -600,6 +627,13 @@ int main(int argc, char **argv) exit(EXIT_FAILURE); } + if (qemu_opts_foreach(&qemu_object_opts, + user_creatable_add_opts_foreach, + NULL, &local_err)) { + error_report_err(local_err); + exit(EXIT_FAILURE); + } + if (disconnect) { fd = open(argv[optind], O_RDWR); if (fd < 0) { diff --git a/qemu-nbd.texi b/qemu-nbd.texi index 46fd483..9f9daca 100644 --- a/qemu-nbd.texi +++ b/qemu-nbd.texi @@ -14,6 +14,12 @@ Export QEMU disk image using NBD protocol. @table @option @item @var{filename} is a disk image filename +@item --object type,id=@var{id},...props... + define a new instance of the @var{type} object class identified by @var{id}. + See the @code{qemu(1)} manual page for full details of the properties + supported. The common object type that it makes sense to define is the + @code{secret} object, which is used to supply passwords and/or encryption + keys. @item -p, --port=@var{port} port to listen on (default @samp{10809}) @item -o, --offset=@var{offset}