| /* |
| * QEMU storage daemon |
| * |
| * Copyright (c) 2003-2008 Fabrice Bellard |
| * Copyright (c) 2019 Kevin Wolf <kwolf@redhat.com> |
| * |
| * Permission is hereby granted, free of charge, to any person obtaining a copy |
| * of this software and associated documentation files (the "Software"), to deal |
| * in the Software without restriction, including without limitation the rights |
| * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell |
| * copies of the Software, and to permit persons to whom the Software is |
| * furnished to do so, subject to the following conditions: |
| * |
| * The above copyright notice and this permission notice shall be included in |
| * all copies or substantial portions of the Software. |
| * |
| * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
| * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
| * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL |
| * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER |
| * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, |
| * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN |
| * THE SOFTWARE. |
| */ |
| |
| #include "qemu/osdep.h" |
| |
| #include <getopt.h> |
| |
| #include "block/block.h" |
| #include "block/nbd.h" |
| #include "chardev/char.h" |
| #include "crypto/init.h" |
| #include "monitor/monitor.h" |
| #include "monitor/monitor-internal.h" |
| |
| #include "qapi/error.h" |
| #include "qapi/qapi-visit-block-core.h" |
| #include "qapi/qapi-visit-block-export.h" |
| #include "qapi/qapi-visit-control.h" |
| #include "qapi/qmp/qdict.h" |
| #include "qapi/qmp/qstring.h" |
| #include "qapi/qobject-input-visitor.h" |
| |
| #include "qemu-common.h" |
| #include "qemu-version.h" |
| #include "qemu/config-file.h" |
| #include "qemu/error-report.h" |
| #include "qemu/help_option.h" |
| #include "qemu/log.h" |
| #include "qemu/main-loop.h" |
| #include "qemu/module.h" |
| #include "qemu/option.h" |
| #include "qom/object_interfaces.h" |
| |
| #include "storage-daemon/qapi/qapi-commands.h" |
| #include "storage-daemon/qapi/qapi-init-commands.h" |
| |
| #include "sysemu/runstate.h" |
| #include "trace/control.h" |
| |
| static const char *pid_file; |
| static volatile bool exit_requested = false; |
| |
| void qemu_system_killed(int signal, pid_t pid) |
| { |
| exit_requested = true; |
| } |
| |
| void qmp_quit(Error **errp) |
| { |
| exit_requested = true; |
| } |
| |
| static void help(void) |
| { |
| printf( |
| "Usage: %s [options]\n" |
| "QEMU storage daemon\n" |
| "\n" |
| " -h, --help display this help and exit\n" |
| " -T, --trace [[enable=]<pattern>][,events=<file>][,file=<file>]\n" |
| " specify tracing options\n" |
| " -V, --version output version information and exit\n" |
| "\n" |
| " --blockdev [driver=]<driver>[,node-name=<N>][,discard=ignore|unmap]\n" |
| " [,cache.direct=on|off][,cache.no-flush=on|off]\n" |
| " [,read-only=on|off][,auto-read-only=on|off]\n" |
| " [,force-share=on|off][,detect-zeroes=on|off|unmap]\n" |
| " [,driver specific parameters...]\n" |
| " configure a block backend\n" |
| "\n" |
| " --chardev <options> configure a character device backend\n" |
| " (see the qemu(1) man page for possible options)\n" |
| "\n" |
| " --export [type=]nbd,id=<id>,node-name=<node-name>[,name=<export-name>]\n" |
| " [,writable=on|off][,bitmap=<name>]\n" |
| " export the specified block node over NBD\n" |
| " (requires --nbd-server)\n" |
| "\n" |
| " --monitor [chardev=]name[,mode=control][,pretty[=on|off]]\n" |
| " configure a QMP monitor\n" |
| "\n" |
| " --nbd-server addr.type=inet,addr.host=<host>,addr.port=<port>\n" |
| " [,tls-creds=<id>][,tls-authz=<id>][,max-connections=<n>]\n" |
| " --nbd-server addr.type=unix,addr.path=<path>\n" |
| " [,tls-creds=<id>][,tls-authz=<id>][,max-connections=<n>]\n" |
| " start an NBD server for exporting block nodes\n" |
| "\n" |
| " --object help list object types that can be added\n" |
| " --object <type>,help list properties for the given object type\n" |
| " --object <type>[,<property>=<value>...]\n" |
| " create a new object of type <type>, setting\n" |
| " properties in the order they are specified. Note\n" |
| " that the 'id' property must be set.\n" |
| " See the qemu(1) man page for documentation of the\n" |
| " objects that can be added.\n" |
| "\n" |
| " --pidfile <path> write process ID to a file after startup\n" |
| "\n" |
| QEMU_HELP_BOTTOM "\n", |
| error_get_progname()); |
| } |
| |
| enum { |
| OPTION_BLOCKDEV = 256, |
| OPTION_CHARDEV, |
| OPTION_EXPORT, |
| OPTION_MONITOR, |
| OPTION_NBD_SERVER, |
| OPTION_OBJECT, |
| OPTION_PIDFILE, |
| }; |
| |
| extern QemuOptsList qemu_chardev_opts; |
| |
| static void init_qmp_commands(void) |
| { |
| qmp_init_marshal(&qmp_commands); |
| |
| QTAILQ_INIT(&qmp_cap_negotiation_commands); |
| qmp_register_command(&qmp_cap_negotiation_commands, "qmp_capabilities", |
| qmp_marshal_qmp_capabilities, QCO_ALLOW_PRECONFIG); |
| } |
| |
| static int getopt_set_loc(int argc, char **argv, const char *optstring, |
| const struct option *longopts) |
| { |
| int c, save_index; |
| |
| optarg = NULL; |
| save_index = optind; |
| c = getopt_long(argc, argv, optstring, longopts, NULL); |
| if (optarg) { |
| loc_set_cmdline(argv, save_index, MAX(1, optind - save_index)); |
| } |
| return c; |
| } |
| |
| static void process_options(int argc, char *argv[]) |
| { |
| int c; |
| |
| static const struct option long_options[] = { |
| {"blockdev", required_argument, NULL, OPTION_BLOCKDEV}, |
| {"chardev", required_argument, NULL, OPTION_CHARDEV}, |
| {"export", required_argument, NULL, OPTION_EXPORT}, |
| {"help", no_argument, NULL, 'h'}, |
| {"monitor", required_argument, NULL, OPTION_MONITOR}, |
| {"nbd-server", required_argument, NULL, OPTION_NBD_SERVER}, |
| {"object", required_argument, NULL, OPTION_OBJECT}, |
| {"pidfile", required_argument, NULL, OPTION_PIDFILE}, |
| {"trace", required_argument, NULL, 'T'}, |
| {"version", no_argument, NULL, 'V'}, |
| {0, 0, 0, 0} |
| }; |
| |
| /* |
| * In contrast to the system emulator, options are processed in the order |
| * they are given on the command lines. This means that things must be |
| * defined first before they can be referenced in another option. |
| */ |
| while ((c = getopt_set_loc(argc, argv, "-hT:V", long_options)) != -1) { |
| switch (c) { |
| case '?': |
| exit(EXIT_FAILURE); |
| case 'h': |
| help(); |
| exit(EXIT_SUCCESS); |
| case 'T': |
| trace_opt_parse(optarg); |
| trace_init_file(); |
| break; |
| case 'V': |
| printf("qemu-storage-daemon version " |
| QEMU_FULL_VERSION "\n" QEMU_COPYRIGHT "\n"); |
| exit(EXIT_SUCCESS); |
| case OPTION_BLOCKDEV: |
| { |
| Visitor *v; |
| BlockdevOptions *options; |
| |
| v = qobject_input_visitor_new_str(optarg, "driver", |
| &error_fatal); |
| |
| visit_type_BlockdevOptions(v, NULL, &options, &error_fatal); |
| visit_free(v); |
| |
| qmp_blockdev_add(options, &error_fatal); |
| qapi_free_BlockdevOptions(options); |
| break; |
| } |
| case OPTION_CHARDEV: |
| { |
| /* TODO This interface is not stable until we QAPIfy it */ |
| QemuOpts *opts = qemu_opts_parse_noisily(&qemu_chardev_opts, |
| optarg, true); |
| if (opts == NULL) { |
| exit(EXIT_FAILURE); |
| } |
| |
| if (!qemu_chr_new_from_opts(opts, NULL, &error_fatal)) { |
| /* No error, but NULL returned means help was printed */ |
| exit(EXIT_SUCCESS); |
| } |
| qemu_opts_del(opts); |
| break; |
| } |
| case OPTION_EXPORT: |
| { |
| Visitor *v; |
| BlockExportOptions *export; |
| |
| v = qobject_input_visitor_new_str(optarg, "type", &error_fatal); |
| visit_type_BlockExportOptions(v, NULL, &export, &error_fatal); |
| visit_free(v); |
| |
| qmp_block_export_add(export, &error_fatal); |
| qapi_free_BlockExportOptions(export); |
| break; |
| } |
| case OPTION_MONITOR: |
| { |
| Visitor *v; |
| MonitorOptions *monitor; |
| |
| v = qobject_input_visitor_new_str(optarg, "chardev", |
| &error_fatal); |
| visit_type_MonitorOptions(v, NULL, &monitor, &error_fatal); |
| visit_free(v); |
| |
| /* TODO Catch duplicate monitor IDs */ |
| monitor_init(monitor, false, &error_fatal); |
| qapi_free_MonitorOptions(monitor); |
| break; |
| } |
| case OPTION_NBD_SERVER: |
| { |
| Visitor *v; |
| NbdServerOptions *options; |
| |
| v = qobject_input_visitor_new_str(optarg, NULL, &error_fatal); |
| visit_type_NbdServerOptions(v, NULL, &options, &error_fatal); |
| visit_free(v); |
| |
| nbd_server_start_options(options, &error_fatal); |
| qapi_free_NbdServerOptions(options); |
| break; |
| } |
| case OPTION_OBJECT: |
| user_creatable_process_cmdline(optarg); |
| break; |
| case OPTION_PIDFILE: |
| pid_file = optarg; |
| break; |
| case 1: |
| error_report("Unexpected argument"); |
| exit(EXIT_FAILURE); |
| default: |
| g_assert_not_reached(); |
| } |
| } |
| loc_set_none(); |
| } |
| |
| static void pid_file_cleanup(void) |
| { |
| unlink(pid_file); |
| } |
| |
| static void pid_file_init(void) |
| { |
| Error *err = NULL; |
| |
| if (!pid_file) { |
| return; |
| } |
| |
| if (!qemu_write_pidfile(pid_file, &err)) { |
| error_reportf_err(err, "cannot create PID file: "); |
| exit(EXIT_FAILURE); |
| } |
| |
| atexit(pid_file_cleanup); |
| } |
| |
| int main(int argc, char *argv[]) |
| { |
| #ifdef CONFIG_POSIX |
| signal(SIGPIPE, SIG_IGN); |
| #endif |
| |
| error_init(argv[0]); |
| qemu_init_exec_dir(argv[0]); |
| os_setup_signal_handling(); |
| |
| module_call_init(MODULE_INIT_QOM); |
| module_call_init(MODULE_INIT_TRACE); |
| qemu_add_opts(&qemu_trace_opts); |
| qcrypto_init(&error_fatal); |
| bdrv_init(); |
| monitor_init_globals_core(); |
| init_qmp_commands(); |
| |
| if (!trace_init_backends()) { |
| return EXIT_FAILURE; |
| } |
| qemu_set_log(LOG_TRACE); |
| |
| qemu_init_main_loop(&error_fatal); |
| process_options(argc, argv); |
| |
| /* |
| * Write the pid file after creating chardevs, exports, and NBD servers but |
| * before accepting connections. This ordering is documented. Do not change |
| * it. |
| */ |
| pid_file_init(); |
| |
| while (!exit_requested) { |
| main_loop_wait(false); |
| } |
| |
| blk_exp_close_all(); |
| bdrv_drain_all_begin(); |
| job_cancel_sync_all(); |
| bdrv_close_all(); |
| |
| monitor_cleanup(); |
| qemu_chr_cleanup(); |
| user_creatable_cleanup(); |
| |
| return EXIT_SUCCESS; |
| } |
