From patchwork Thu Mar 25 16:43:38 2010 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Aneesh Kumar K.V" X-Patchwork-Id: 48581 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Received: from lists.gnu.org (lists.gnu.org [199.232.76.165]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (Client did not present a certificate) by ozlabs.org (Postfix) with ESMTPS id CC42FB7067 for ; Fri, 26 Mar 2010 05:32:41 +1100 (EST) Received: from localhost ([127.0.0.1]:51765 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.43) id 1NurrA-0002rW-TZ for incoming@patchwork.ozlabs.org; Thu, 25 Mar 2010 14:32:36 -0400 Received: from mailman by lists.gnu.org with tmda-scanned (Exim 4.43) id 1NuqBH-0007Oq-BY for qemu-devel@nongnu.org; Thu, 25 Mar 2010 12:45:15 -0400 Received: from [140.186.70.92] (port=50876 helo=eggs.gnu.org) by lists.gnu.org with esmtp (Exim 4.43) id 1NuqB4-0007KJ-5c for qemu-devel@nongnu.org; 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Fri, 26 Mar 2010 03:44:47 +1100 From: "Aneesh Kumar K.V" To: qemu-devel@nongnu.org Date: Thu, 25 Mar 2010 22:13:38 +0530 Message-Id: <1269535420-31206-31-git-send-email-aneesh.kumar@linux.vnet.ibm.com> X-Mailer: git-send-email 1.7.0.2.323.g0d092 In-Reply-To: <1269535420-31206-1-git-send-email-aneesh.kumar@linux.vnet.ibm.com> References: <1269535420-31206-1-git-send-email-aneesh.kumar@linux.vnet.ibm.com> X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.6, seldom 2.4 (older, 4) Cc: ericvh@gmail.com, aliguori@us.ibm.com, "Aneesh Kumar K.V" , Gautham R Shenoy Subject: [Qemu-devel] [PATCH -V3 30/32] virtio-9p: Create a syntactic shortcut for the file-system pass-thru X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: qemu-devel.nongnu.org List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org Errors-To: qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org From: Gautham R Shenoy Currently the commandline to create a virtual-filesystem pass-through between the guest and the host is as follows: #qemu -fsdev fstype,id=ID,path=path/to/share \ -device virtio-9p-pci,fsdev=ID,mount_tag=tag \ This patch provides a syntactic short-cut to achieve the same as follows: #qemu -virtfs fstype,path=path/to/share,mount_tag=tag This will be internally expanded as: #qemu -fsdev fstype,id=tag,path=path/to/share, \ -device virtio-9p-pci,fsdev=tag,mount_tag=tag \ Signed-off-by: Gautham R Shenoy Signed-off-by: Aneesh Kumar K.V --- qemu-config.c | 20 ++++++++++++++++++++ qemu-config.h | 1 + qemu-options.hx | 32 ++++++++++++++++++++++++++++++++ vl.c | 42 ++++++++++++++++++++++++++++++++++++++++++ 4 files changed, 95 insertions(+), 0 deletions(-) diff --git a/qemu-config.c b/qemu-config.c index 0c06e1b..5564a24 100644 --- a/qemu-config.c +++ b/qemu-config.c @@ -167,6 +167,26 @@ QemuOptsList qemu_fsdev_opts = { }, }; +QemuOptsList qemu_virtfs_opts = { + .name = "virtfs", + .implied_opt_name = "fstype", + .head = QTAILQ_HEAD_INITIALIZER(qemu_virtfs_opts.head), + .desc = { + { + .name = "fstype", + .type = QEMU_OPT_STRING, + },{ + .name = "path", + .type = QEMU_OPT_STRING, + },{ + .name = "mount_tag", + .type = QEMU_OPT_STRING, + }, + + { /*End of list */ } + }, +}; + QemuOptsList qemu_device_opts = { .name = "device", .implied_opt_name = "driver", diff --git a/qemu-config.h b/qemu-config.h index b01306c..8612747 100644 --- a/qemu-config.h +++ b/qemu-config.h @@ -4,6 +4,7 @@ extern QemuOptsList qemu_drive_opts; extern QemuOptsList qemu_chardev_opts; extern QemuOptsList qemu_fsdev_opts; +extern QemuOptsList qemu_virtfs_opts; extern QemuOptsList qemu_device_opts; extern QemuOptsList qemu_netdev_opts; extern QemuOptsList qemu_net_opts; diff --git a/qemu-options.hx b/qemu-options.hx index 71a6fda..cbdc22b 100644 --- a/qemu-options.hx +++ b/qemu-options.hx @@ -498,6 +498,38 @@ Create a file-system-"device" for local-filesystem. @end table ETEXI +DEFHEADING(Virtual File system pass-through options:) + +DEF("virtfs", HAS_ARG, QEMU_OPTION_virtfs, + "-virtfs local,path=path,mount_tag=tag\n") + +STEXI + +The general form of a Virtual File system pass-through option is: +@table @option + +@item -virtfs @var{fstype} [,@var{options}] +@findex -virtfs +Fstype is one of: +@option{local}, +The specific Fstype will determine the applicable options. + +Options to each backend are described below. + +@item -virtfs local ,path=@var{path} ,mount_tag=@var{mount_tag} + +Create a Virtual file-system-pass through for local-filesystem. + +@option{local} is only available on Linux. + +@option{path} specifies the path to be exported. @option{path} is required. + +@option{mount_tag} specifies the tag with which the exported file is mounted. +@option{mount_tag} is required. + +@end table +ETEXI + DEFHEADING() DEF("name", HAS_ARG, QEMU_OPTION_name, diff --git a/vl.c b/vl.c index 0228045..e9e597b 100644 --- a/vl.c +++ b/vl.c @@ -3747,6 +3747,8 @@ int main(int argc, char **argv, char **envp) CPUState *env; int show_vnc_port = 0; int defconfig = 1; + char *arg_fsdev = NULL; + char *arg_9p = NULL; error_set_progname(argv[0]); @@ -4272,6 +4274,46 @@ int main(int argc, char **argv, char **envp) exit(1); } break; + case QEMU_OPTION_virtfs: + opts = qemu_opts_parse(&qemu_virtfs_opts, optarg, 1); + if (!opts) { + fprintf(stderr, "parse error: %s\n", optarg); + exit(1); + } + + qemu_asprintf(&arg_fsdev, "%s,id=%s,path=%s", + qemu_opt_get(opts, "fstype"), + qemu_opt_get(opts, "mount_tag"), + qemu_opt_get(opts, "path")); + if (!arg_fsdev) { + fprintf(stderr, "No memory to parse -fsdev for %s\n", + optarg); + exit(1); + } + + + qemu_asprintf(&arg_9p, "virtio-9p-pci,fsdev=%s,mount_tag=%s", + qemu_opt_get(opts, "mount_tag"), + qemu_opt_get(opts, "mount_tag")); + if (!arg_9p) { + fprintf(stderr, "No memory to parse -device for %s\n", + optarg); + exit(1); + } + + if (!qemu_opts_parse(&qemu_fsdev_opts, arg_fsdev, 1)) { + fprintf(stderr, "parse error [fsdev]: %s\n", optarg); + exit(1); + } + + if (!qemu_opts_parse(&qemu_device_opts, arg_9p, 1)) { + fprintf(stderr, "parse error [device]: %s\n", optarg); + exit(1); + } + + qemu_free(arg_fsdev); + qemu_free(arg_9p); + break; case QEMU_OPTION_serial: add_device_config(DEV_SERIAL, optarg); default_serial = 0;