diff options
| -rw-r--r-- | contrib/vhost-user-blk/vhost-user-blk.c | 110 | ||||
| -rw-r--r-- | docs/interop/vhost-user.json | 31 | ||||
| -rw-r--r-- | docs/interop/vhost-user.rst | 17 |
3 files changed, 113 insertions, 45 deletions
diff --git a/contrib/vhost-user-blk/vhost-user-blk.c b/contrib/vhost-user-blk/vhost-user-blk.c index ae61034656..6fd91c7e99 100644 --- a/contrib/vhost-user-blk/vhost-user-blk.c +++ b/contrib/vhost-user-blk/vhost-user-blk.c @@ -576,70 +576,90 @@ vub_new(char *blk_file) return vdev_blk; } +static int opt_fdnum = -1; +static char *opt_socket_path; +static char *opt_blk_file; +static gboolean opt_print_caps; +static gboolean opt_read_only; + +static GOptionEntry entries[] = { + { "print-capabilities", 'c', 0, G_OPTION_ARG_NONE, &opt_print_caps, + "Print capabilities", NULL }, + { "fd", 'f', 0, G_OPTION_ARG_INT, &opt_fdnum, + "Use inherited fd socket", "FDNUM" }, + { "socket-path", 's', 0, G_OPTION_ARG_FILENAME, &opt_socket_path, + "Use UNIX socket path", "PATH" }, + {"blk-file", 'b', 0, G_OPTION_ARG_FILENAME, &opt_blk_file, + "block device or file path", "PATH"}, + { "read-only", 'r', 0, G_OPTION_ARG_NONE, &opt_read_only, + "Enable read-only", NULL } +}; + int main(int argc, char **argv) { - int opt; - char *unix_socket = NULL; - char *blk_file = NULL; - bool enable_ro = false; int lsock = -1, csock = -1; VubDev *vdev_blk = NULL; - - while ((opt = getopt(argc, argv, "b:rs:h")) != -1) { - switch (opt) { - case 'b': - blk_file = g_strdup(optarg); - break; - case 's': - unix_socket = g_strdup(optarg); - break; - case 'r': - enable_ro = true; - break; - case 'h': - default: - printf("Usage: %s [ -b block device or file, -s UNIX domain socket" - " | -r Enable read-only ] | [ -h ]\n", argv[0]); - return 0; + GError *error = NULL; + GOptionContext *context; + + context = g_option_context_new(NULL); + g_option_context_add_main_entries(context, entries, NULL); + if (!g_option_context_parse(context, &argc, &argv, &error)) { + g_printerr("Option parsing failed: %s\n", error->message); + exit(EXIT_FAILURE); + } + if (opt_print_caps) { + g_print("{\n"); + g_print(" \"type\": \"block\",\n"); + g_print(" \"features\": [\n"); + g_print(" \"read-only\",\n"); + g_print(" \"blk-file\"\n"); + g_print(" ]\n"); + g_print("}\n"); + exit(EXIT_SUCCESS); + } + + if (!opt_blk_file) { + g_print("%s\n", g_option_context_get_help(context, true, NULL)); + exit(EXIT_FAILURE); + } + + if (opt_socket_path) { + lsock = unix_sock_new(opt_socket_path); + if (lsock < 0) { + exit(EXIT_FAILURE); } + } else if (opt_fdnum < 0) { + g_print("%s\n", g_option_context_get_help(context, true, NULL)); + exit(EXIT_FAILURE); + } else { + lsock = opt_fdnum; } - if (!unix_socket || !blk_file) { - printf("Usage: %s [ -b block device or file, -s UNIX domain socket" - " | -r Enable read-only ] | [ -h ]\n", argv[0]); - return -1; - } - - lsock = unix_sock_new(unix_socket); - if (lsock < 0) { - goto err; - } - - csock = accept(lsock, (void *)0, (void *)0); + csock = accept(lsock, NULL, NULL); if (csock < 0) { - fprintf(stderr, "Accept error %s\n", strerror(errno)); - goto err; + g_printerr("Accept error %s\n", strerror(errno)); + exit(EXIT_FAILURE); } - vdev_blk = vub_new(blk_file); + vdev_blk = vub_new(opt_blk_file); if (!vdev_blk) { - goto err; + exit(EXIT_FAILURE); } - if (enable_ro) { + if (opt_read_only) { vdev_blk->enable_ro = true; } if (!vug_init(&vdev_blk->parent, VHOST_USER_BLK_MAX_QUEUES, csock, vub_panic_cb, &vub_iface)) { - fprintf(stderr, "Failed to initialized libvhost-user-glib\n"); - goto err; + g_printerr("Failed to initialize libvhost-user-glib\n"); + exit(EXIT_FAILURE); } g_main_loop_run(vdev_blk->loop); - + g_main_loop_unref(vdev_blk->loop); + g_option_context_free(context); vug_deinit(&vdev_blk->parent); - -err: vub_free(vdev_blk); if (csock >= 0) { close(csock); @@ -647,8 +667,8 @@ err: if (lsock >= 0) { close(lsock); } - g_free(unix_socket); - g_free(blk_file); + g_free(opt_socket_path); + g_free(opt_blk_file); return 0; } diff --git a/docs/interop/vhost-user.json b/docs/interop/vhost-user.json index da6aaf51c8..ce0ef74db5 100644 --- a/docs/interop/vhost-user.json +++ b/docs/interop/vhost-user.json @@ -55,6 +55,37 @@ } ## +# @VHostUserBackendBlockFeature: +# +# List of vhost user "block" features. +# +# @read-only: The --read-only command line option is supported. +# @blk-file: The --blk-file command line option is supported. +# +# Since: 5.0 +## +{ + 'enum': 'VHostUserBackendBlockFeature', + 'data': [ 'read-only', 'blk-file' ] +} + +## +# @VHostUserBackendCapabilitiesBlock: +# +# Capabilities reported by vhost user "block" backends +# +# @features: list of supported features. +# +# Since: 5.0 +## +{ + 'struct': 'VHostUserBackendCapabilitiesBlock', + 'data': { + 'features': [ 'VHostUserBackendBlockFeature' ] + } +} + +## # @VHostUserBackendInputFeature: # # List of vhost user "input" features. diff --git a/docs/interop/vhost-user.rst b/docs/interop/vhost-user.rst index 7827b710aa..015ac08177 100644 --- a/docs/interop/vhost-user.rst +++ b/docs/interop/vhost-user.rst @@ -1376,3 +1376,20 @@ Command line options: Enable virgl rendering support. (optional) + +vhost-user-blk +-------------- + +Command line options: + +--blk-file=PATH + + Specify block device or file path. + + (optional) + +--read-only + + Enable read-only. + + (optional) |