| /* |
| * QEMU Guest Agent |
| * |
| * Copyright IBM Corp. 2011 |
| * |
| * Authors: |
| * Adam Litke <aglitke@linux.vnet.ibm.com> |
| * Michael Roth <mdroth@linux.vnet.ibm.com> |
| * |
| * This work is licensed under the terms of the GNU GPL, version 2 or later. |
| * See the COPYING file in the top-level directory. |
| */ |
| |
| #include "qemu/osdep.h" |
| #include <getopt.h> |
| #include <glib/gstdio.h> |
| #ifndef _WIN32 |
| #include <syslog.h> |
| #include <sys/wait.h> |
| #endif |
| #include "qemu-common.h" |
| #include "qapi/qmp/json-parser.h" |
| #include "qapi/qmp/qdict.h" |
| #include "qapi/qmp/qjson.h" |
| #include "qapi/qmp/qstring.h" |
| #include "guest-agent-core.h" |
| #include "qga-qapi-init-commands.h" |
| #include "qapi/qmp/qerror.h" |
| #include "qapi/error.h" |
| #include "channel.h" |
| #include "qemu/bswap.h" |
| #include "qemu/help_option.h" |
| #include "qemu/sockets.h" |
| #include "qemu/systemd.h" |
| #include "qemu-version.h" |
| #ifdef _WIN32 |
| #include <dbt.h> |
| #include "qga/service-win32.h" |
| #include "qga/vss-win32.h" |
| #endif |
| #ifdef __linux__ |
| #include <linux/fs.h> |
| #ifdef FIFREEZE |
| #define CONFIG_FSFREEZE |
| #endif |
| #endif |
| |
| #ifndef _WIN32 |
| #define QGA_VIRTIO_PATH_DEFAULT "/dev/virtio-ports/org.qemu.guest_agent.0" |
| #define QGA_STATE_RELATIVE_DIR "run" |
| #define QGA_SERIAL_PATH_DEFAULT "/dev/ttyS0" |
| #else |
| #define QGA_VIRTIO_PATH_DEFAULT "\\\\.\\Global\\org.qemu.guest_agent.0" |
| #define QGA_STATE_RELATIVE_DIR "qemu-ga" |
| #define QGA_SERIAL_PATH_DEFAULT "COM1" |
| #endif |
| #ifdef CONFIG_FSFREEZE |
| #define QGA_FSFREEZE_HOOK_DEFAULT CONFIG_QEMU_CONFDIR "/fsfreeze-hook" |
| #endif |
| #define QGA_SENTINEL_BYTE 0xFF |
| #define QGA_CONF_DEFAULT CONFIG_QEMU_CONFDIR G_DIR_SEPARATOR_S "qemu-ga.conf" |
| #define QGA_RETRY_INTERVAL 5 |
| |
| static struct { |
| const char *state_dir; |
| const char *pidfile; |
| } dfl_pathnames; |
| |
| typedef struct GAPersistentState { |
| #define QGA_PSTATE_DEFAULT_FD_COUNTER 1000 |
| int64_t fd_counter; |
| } GAPersistentState; |
| |
| typedef struct GAConfig GAConfig; |
| |
| struct GAState { |
| JSONMessageParser parser; |
| GMainLoop *main_loop; |
| GAChannel *channel; |
| bool virtio; /* fastpath to check for virtio to deal with poll() quirks */ |
| GACommandState *command_state; |
| GLogLevelFlags log_level; |
| FILE *log_file; |
| bool logging_enabled; |
| #ifdef _WIN32 |
| GAService service; |
| HANDLE wakeup_event; |
| #endif |
| bool delimit_response; |
| bool frozen; |
| GList *blacklist; |
| char *state_filepath_isfrozen; |
| struct { |
| const char *log_filepath; |
| const char *pid_filepath; |
| } deferred_options; |
| #ifdef CONFIG_FSFREEZE |
| const char *fsfreeze_hook; |
| #endif |
| gchar *pstate_filepath; |
| GAPersistentState pstate; |
| GAConfig *config; |
| int socket_activation; |
| bool force_exit; |
| }; |
| |
| struct GAState *ga_state; |
| QmpCommandList ga_commands; |
| |
| /* commands that are safe to issue while filesystems are frozen */ |
| static const char *ga_freeze_whitelist[] = { |
| "guest-ping", |
| "guest-info", |
| "guest-sync", |
| "guest-sync-delimited", |
| "guest-fsfreeze-status", |
| "guest-fsfreeze-thaw", |
| NULL |
| }; |
| |
| #ifdef _WIN32 |
| DWORD WINAPI service_ctrl_handler(DWORD ctrl, DWORD type, LPVOID data, |
| LPVOID ctx); |
| DWORD WINAPI handle_serial_device_events(DWORD type, LPVOID data); |
| VOID WINAPI service_main(DWORD argc, TCHAR *argv[]); |
| #endif |
| static int run_agent(GAState *s); |
| static void stop_agent(GAState *s, bool requested); |
| |
| static void |
| init_dfl_pathnames(void) |
| { |
| g_assert(dfl_pathnames.state_dir == NULL); |
| g_assert(dfl_pathnames.pidfile == NULL); |
| dfl_pathnames.state_dir = qemu_get_local_state_pathname( |
| QGA_STATE_RELATIVE_DIR); |
| dfl_pathnames.pidfile = qemu_get_local_state_pathname( |
| QGA_STATE_RELATIVE_DIR G_DIR_SEPARATOR_S "qemu-ga.pid"); |
| } |
| |
| static void quit_handler(int sig) |
| { |
| /* if we're frozen, don't exit unless we're absolutely forced to, |
| * because it's basically impossible for graceful exit to complete |
| * unless all log/pid files are on unfreezable filesystems. there's |
| * also a very likely chance killing the agent before unfreezing |
| * the filesystems is a mistake (or will be viewed as one later). |
| * On Windows the freeze interval is limited to 10 seconds, so |
| * we should quit, but first we should wait for the timeout, thaw |
| * the filesystem and quit. |
| */ |
| if (ga_is_frozen(ga_state)) { |
| #ifdef _WIN32 |
| int i = 0; |
| Error *err = NULL; |
| HANDLE hEventTimeout; |
| |
| g_debug("Thawing filesystems before exiting"); |
| |
| hEventTimeout = OpenEvent(EVENT_ALL_ACCESS, FALSE, EVENT_NAME_TIMEOUT); |
| if (hEventTimeout) { |
| WaitForSingleObject(hEventTimeout, 0); |
| CloseHandle(hEventTimeout); |
| } |
| qga_vss_fsfreeze(&i, false, NULL, &err); |
| if (err) { |
| g_debug("Error unfreezing filesystems prior to exiting: %s", |
| error_get_pretty(err)); |
| error_free(err); |
| } |
| #else |
| return; |
| #endif |
| } |
| g_debug("received signal num %d, quitting", sig); |
| |
| stop_agent(ga_state, true); |
| } |
| |
| #ifndef _WIN32 |
| static gboolean register_signal_handlers(void) |
| { |
| struct sigaction sigact; |
| int ret; |
| |
| memset(&sigact, 0, sizeof(struct sigaction)); |
| sigact.sa_handler = quit_handler; |
| |
| ret = sigaction(SIGINT, &sigact, NULL); |
| if (ret == -1) { |
| g_error("error configuring signal handler: %s", strerror(errno)); |
| } |
| ret = sigaction(SIGTERM, &sigact, NULL); |
| if (ret == -1) { |
| g_error("error configuring signal handler: %s", strerror(errno)); |
| } |
| |
| sigact.sa_handler = SIG_IGN; |
| if (sigaction(SIGPIPE, &sigact, NULL) != 0) { |
| g_error("error configuring SIGPIPE signal handler: %s", |
| strerror(errno)); |
| } |
| |
| return true; |
| } |
| |
| /* TODO: use this in place of all post-fork() fclose(std*) callers */ |
| void reopen_fd_to_null(int fd) |
| { |
| int nullfd; |
| |
| nullfd = open("/dev/null", O_RDWR); |
| if (nullfd < 0) { |
| return; |
| } |
| |
| dup2(nullfd, fd); |
| |
| if (nullfd != fd) { |
| close(nullfd); |
| } |
| } |
| #endif |
| |
| static void usage(const char *cmd) |
| { |
| printf( |
| "Usage: %s [-m <method> -p <path>] [<options>]\n" |
| "QEMU Guest Agent " QEMU_FULL_VERSION "\n" |
| QEMU_COPYRIGHT "\n" |
| "\n" |
| " -m, --method transport method: one of unix-listen, virtio-serial,\n" |
| " isa-serial, or vsock-listen (virtio-serial is the default)\n" |
| " -p, --path device/socket path (the default for virtio-serial is:\n" |
| " %s,\n" |
| " the default for isa-serial is:\n" |
| " %s).\n" |
| " Socket addresses for vsock-listen are written as\n" |
| " <cid>:<port>.\n" |
| " -l, --logfile set logfile path, logs to stderr by default\n" |
| " -f, --pidfile specify pidfile (default is %s)\n" |
| #ifdef CONFIG_FSFREEZE |
| " -F, --fsfreeze-hook\n" |
| " enable fsfreeze hook. Accepts an optional argument that\n" |
| " specifies script to run on freeze/thaw. Script will be\n" |
| " called with 'freeze'/'thaw' arguments accordingly.\n" |
| " (default is %s)\n" |
| " If using -F with an argument, do not follow -F with a\n" |
| " space.\n" |
| " (for example: -F/var/run/fsfreezehook.sh)\n" |
| #endif |
| " -t, --statedir specify dir to store state information (absolute paths\n" |
| " only, default is %s)\n" |
| " -v, --verbose log extra debugging information\n" |
| " -V, --version print version information and exit\n" |
| " -d, --daemonize become a daemon\n" |
| #ifdef _WIN32 |
| " -s, --service service commands: install, uninstall, vss-install, vss-uninstall\n" |
| #endif |
| " -b, --blacklist comma-separated list of RPCs to disable (no spaces, \"?\"\n" |
| " to list available RPCs)\n" |
| " -D, --dump-conf dump a qemu-ga config file based on current config\n" |
| " options / command-line parameters to stdout\n" |
| " -r, --retry-path attempt re-opening path if it's unavailable or closed\n" |
| " due to an error which may be recoverable in the future\n" |
| " (virtio-serial driver re-install, serial device hot\n" |
| " plug/unplug, etc.)\n" |
| " -h, --help display this help and exit\n" |
| "\n" |
| QEMU_HELP_BOTTOM "\n" |
| , cmd, QGA_VIRTIO_PATH_DEFAULT, QGA_SERIAL_PATH_DEFAULT, |
| dfl_pathnames.pidfile, |
| #ifdef CONFIG_FSFREEZE |
| QGA_FSFREEZE_HOOK_DEFAULT, |
| #endif |
| dfl_pathnames.state_dir); |
| } |
| |
| static const char *ga_log_level_str(GLogLevelFlags level) |
| { |
| switch (level & G_LOG_LEVEL_MASK) { |
| case G_LOG_LEVEL_ERROR: |
| return "error"; |
| case G_LOG_LEVEL_CRITICAL: |
| return "critical"; |
| case G_LOG_LEVEL_WARNING: |
| return "warning"; |
| case G_LOG_LEVEL_MESSAGE: |
| return "message"; |
| case G_LOG_LEVEL_INFO: |
| return "info"; |
| case G_LOG_LEVEL_DEBUG: |
| return "debug"; |
| default: |
| return "user"; |
| } |
| } |
| |
| bool ga_logging_enabled(GAState *s) |
| { |
| return s->logging_enabled; |
| } |
| |
| void ga_disable_logging(GAState *s) |
| { |
| s->logging_enabled = false; |
| } |
| |
| void ga_enable_logging(GAState *s) |
| { |
| s->logging_enabled = true; |
| } |
| |
| static void ga_log(const gchar *domain, GLogLevelFlags level, |
| const gchar *msg, gpointer opaque) |
| { |
| GAState *s = opaque; |
| GTimeVal time; |
| const char *level_str = ga_log_level_str(level); |
| |
| if (!ga_logging_enabled(s)) { |
| return; |
| } |
| |
| level &= G_LOG_LEVEL_MASK; |
| #ifndef _WIN32 |
| if (g_strcmp0(domain, "syslog") == 0) { |
| syslog(LOG_INFO, "%s: %s", level_str, msg); |
| } else if (level & s->log_level) { |
| #else |
| if (level & s->log_level) { |
| #endif |
| g_get_current_time(&time); |
| fprintf(s->log_file, |
| "%lu.%lu: %s: %s\n", time.tv_sec, time.tv_usec, level_str, msg); |
| fflush(s->log_file); |
| } |
| } |
| |
| void ga_set_response_delimited(GAState *s) |
| { |
| s->delimit_response = true; |
| } |
| |
| static FILE *ga_open_logfile(const char *logfile) |
| { |
| FILE *f; |
| |
| f = fopen(logfile, "a"); |
| if (!f) { |
| return NULL; |
| } |
| |
| qemu_set_cloexec(fileno(f)); |
| return f; |
| } |
| |
| static gint ga_strcmp(gconstpointer str1, gconstpointer str2) |
| { |
| return strcmp(str1, str2); |
| } |
| |
| /* disable commands that aren't safe for fsfreeze */ |
| static void ga_disable_non_whitelisted(const QmpCommand *cmd, void *opaque) |
| { |
| bool whitelisted = false; |
| int i = 0; |
| const char *name = qmp_command_name(cmd); |
| |
| while (ga_freeze_whitelist[i] != NULL) { |
| if (strcmp(name, ga_freeze_whitelist[i]) == 0) { |
| whitelisted = true; |
| } |
| i++; |
| } |
| if (!whitelisted) { |
| g_debug("disabling command: %s", name); |
| qmp_disable_command(&ga_commands, name); |
| } |
| } |
| |
| /* [re-]enable all commands, except those explicitly blacklisted by user */ |
| static void ga_enable_non_blacklisted(const QmpCommand *cmd, void *opaque) |
| { |
| GList *blacklist = opaque; |
| const char *name = qmp_command_name(cmd); |
| |
| if (g_list_find_custom(blacklist, name, ga_strcmp) == NULL && |
| !qmp_command_is_enabled(cmd)) { |
| g_debug("enabling command: %s", name); |
| qmp_enable_command(&ga_commands, name); |
| } |
| } |
| |
| static bool ga_create_file(const char *path) |
| { |
| int fd = open(path, O_CREAT | O_WRONLY, S_IWUSR | S_IRUSR); |
| if (fd == -1) { |
| g_warning("unable to open/create file %s: %s", path, strerror(errno)); |
| return false; |
| } |
| close(fd); |
| return true; |
| } |
| |
| static bool ga_delete_file(const char *path) |
| { |
| int ret = unlink(path); |
| if (ret == -1) { |
| g_warning("unable to delete file: %s: %s", path, strerror(errno)); |
| return false; |
| } |
| |
| return true; |
| } |
| |
| bool ga_is_frozen(GAState *s) |
| { |
| return s->frozen; |
| } |
| |
| void ga_set_frozen(GAState *s) |
| { |
| if (ga_is_frozen(s)) { |
| return; |
| } |
| /* disable all non-whitelisted (for frozen state) commands */ |
| qmp_for_each_command(&ga_commands, ga_disable_non_whitelisted, NULL); |
| g_warning("disabling logging due to filesystem freeze"); |
| ga_disable_logging(s); |
| s->frozen = true; |
| if (!ga_create_file(s->state_filepath_isfrozen)) { |
| g_warning("unable to create %s, fsfreeze may not function properly", |
| s->state_filepath_isfrozen); |
| } |
| } |
| |
| void ga_unset_frozen(GAState *s) |
| { |
| if (!ga_is_frozen(s)) { |
| return; |
| } |
| |
| /* if we delayed creation/opening of pid/log files due to being |
| * in a frozen state at start up, do it now |
| */ |
| if (s->deferred_options.log_filepath) { |
| s->log_file = ga_open_logfile(s->deferred_options.log_filepath); |
| if (!s->log_file) { |
| s->log_file = stderr; |
| } |
| s->deferred_options.log_filepath = NULL; |
| } |
| ga_enable_logging(s); |
| g_warning("logging re-enabled due to filesystem unfreeze"); |
| if (s->deferred_options.pid_filepath) { |
| Error *err = NULL; |
| |
| if (!qemu_write_pidfile(s->deferred_options.pid_filepath, &err)) { |
| g_warning("%s", error_get_pretty(err)); |
| error_free(err); |
| } |
| s->deferred_options.pid_filepath = NULL; |
| } |
| |
| /* enable all disabled, non-blacklisted commands */ |
| qmp_for_each_command(&ga_commands, ga_enable_non_blacklisted, s->blacklist); |
| s->frozen = false; |
| if (!ga_delete_file(s->state_filepath_isfrozen)) { |
| g_warning("unable to delete %s, fsfreeze may not function properly", |
| s->state_filepath_isfrozen); |
| } |
| } |
| |
| #ifdef CONFIG_FSFREEZE |
| const char *ga_fsfreeze_hook(GAState *s) |
| { |
| return s->fsfreeze_hook; |
| } |
| #endif |
| |
| static void become_daemon(const char *pidfile) |
| { |
| #ifndef _WIN32 |
| pid_t pid, sid; |
| |
| pid = fork(); |
| if (pid < 0) { |
| exit(EXIT_FAILURE); |
| } |
| if (pid > 0) { |
| exit(EXIT_SUCCESS); |
| } |
| |
| if (pidfile) { |
| Error *err = NULL; |
| |
| if (!qemu_write_pidfile(pidfile, &err)) { |
| g_critical("%s", error_get_pretty(err)); |
| error_free(err); |
| exit(EXIT_FAILURE); |
| } |
| } |
| |
| umask(S_IRWXG | S_IRWXO); |
| sid = setsid(); |
| if (sid < 0) { |
| goto fail; |
| } |
| if ((chdir("/")) < 0) { |
| goto fail; |
| } |
| |
| reopen_fd_to_null(STDIN_FILENO); |
| reopen_fd_to_null(STDOUT_FILENO); |
| reopen_fd_to_null(STDERR_FILENO); |
| return; |
| |
| fail: |
| if (pidfile) { |
| unlink(pidfile); |
| } |
| g_critical("failed to daemonize"); |
| exit(EXIT_FAILURE); |
| #endif |
| } |
| |
| static int send_response(GAState *s, const QDict *rsp) |
| { |
| const char *buf; |
| QString *payload_qstr, *response_qstr; |
| GIOStatus status; |
| |
| g_assert(rsp && s->channel); |
| |
| payload_qstr = qobject_to_json(QOBJECT(rsp)); |
| if (!payload_qstr) { |
| return -EINVAL; |
| } |
| |
| if (s->delimit_response) { |
| s->delimit_response = false; |
| response_qstr = qstring_new(); |
| qstring_append_chr(response_qstr, QGA_SENTINEL_BYTE); |
| qstring_append(response_qstr, qstring_get_str(payload_qstr)); |
| qobject_unref(payload_qstr); |
| } else { |
| response_qstr = payload_qstr; |
| } |
| |
| qstring_append_chr(response_qstr, '\n'); |
| buf = qstring_get_str(response_qstr); |
| status = ga_channel_write_all(s->channel, buf, strlen(buf)); |
| qobject_unref(response_qstr); |
| if (status != G_IO_STATUS_NORMAL) { |
| return -EIO; |
| } |
| |
| return 0; |
| } |
| |
| /* handle requests/control events coming in over the channel */ |
| static void process_event(void *opaque, QObject *obj, Error *err) |
| { |
| GAState *s = opaque; |
| QDict *rsp; |
| int ret; |
| |
| g_debug("process_event: called"); |
| assert(!obj != !err); |
| if (err) { |
| rsp = qmp_error_response(err); |
| goto end; |
| } |
| |
| g_debug("processing command"); |
| rsp = qmp_dispatch(&ga_commands, obj, false); |
| |
| end: |
| ret = send_response(s, rsp); |
| if (ret < 0) { |
| g_warning("error sending error response: %s", strerror(-ret)); |
| } |
| qobject_unref(rsp); |
| qobject_unref(obj); |
| } |
| |
| /* false return signals GAChannel to close the current client connection */ |
| static gboolean channel_event_cb(GIOCondition condition, gpointer data) |
| { |
| GAState *s = data; |
| gchar buf[QGA_READ_COUNT_DEFAULT+1]; |
| gsize count; |
| GIOStatus status = ga_channel_read(s->channel, buf, QGA_READ_COUNT_DEFAULT, &count); |
| switch (status) { |
| case G_IO_STATUS_ERROR: |
| g_warning("error reading channel"); |
| stop_agent(s, false); |
| return false; |
| case G_IO_STATUS_NORMAL: |
| buf[count] = 0; |
| g_debug("read data, count: %d, data: %s", (int)count, buf); |
| json_message_parser_feed(&s->parser, (char *)buf, (int)count); |
| break; |
| case G_IO_STATUS_EOF: |
| g_debug("received EOF"); |
| if (!s->virtio) { |
| return false; |
| } |
| /* fall through */ |
| case G_IO_STATUS_AGAIN: |
| /* virtio causes us to spin here when no process is attached to |
| * host-side chardev. sleep a bit to mitigate this |
| */ |
| if (s->virtio) { |
| usleep(100*1000); |
| } |
| return true; |
| default: |
| g_warning("unknown channel read status, closing"); |
| return false; |
| } |
| return true; |
| } |
| |
| static gboolean channel_init(GAState *s, const gchar *method, const gchar *path, |
| int listen_fd) |
| { |
| GAChannelMethod channel_method; |
| |
| if (strcmp(method, "virtio-serial") == 0) { |
| s->virtio = true; /* virtio requires special handling in some cases */ |
| channel_method = GA_CHANNEL_VIRTIO_SERIAL; |
| } else if (strcmp(method, "isa-serial") == 0) { |
| channel_method = GA_CHANNEL_ISA_SERIAL; |
| } else if (strcmp(method, "unix-listen") == 0) { |
| channel_method = GA_CHANNEL_UNIX_LISTEN; |
| } else if (strcmp(method, "vsock-listen") == 0) { |
| channel_method = GA_CHANNEL_VSOCK_LISTEN; |
| } else { |
| g_critical("unsupported channel method/type: %s", method); |
| return false; |
| } |
| |
| s->channel = ga_channel_new(channel_method, path, listen_fd, |
| channel_event_cb, s); |
| if (!s->channel) { |
| g_critical("failed to create guest agent channel"); |
| return false; |
| } |
| |
| return true; |
| } |
| |
| #ifdef _WIN32 |
| DWORD WINAPI handle_serial_device_events(DWORD type, LPVOID data) |
| { |
| DWORD ret = NO_ERROR; |
| PDEV_BROADCAST_HDR broadcast_header = (PDEV_BROADCAST_HDR)data; |
| |
| if (broadcast_header->dbch_devicetype == DBT_DEVTYP_DEVICEINTERFACE) { |
| switch (type) { |
| /* Device inserted */ |
| case DBT_DEVICEARRIVAL: |
| /* Start QEMU-ga's service */ |
| if (!SetEvent(ga_state->wakeup_event)) { |
| ret = GetLastError(); |
| } |
| break; |
| /* Device removed */ |
| case DBT_DEVICEQUERYREMOVE: |
| case DBT_DEVICEREMOVEPENDING: |
| case DBT_DEVICEREMOVECOMPLETE: |
| /* Stop QEMU-ga's service */ |
| if (!ResetEvent(ga_state->wakeup_event)) { |
| ret = GetLastError(); |
| } |
| break; |
| default: |
| ret = ERROR_CALL_NOT_IMPLEMENTED; |
| } |
| } |
| return ret; |
| } |
| |
| DWORD WINAPI service_ctrl_handler(DWORD ctrl, DWORD type, LPVOID data, |
| LPVOID ctx) |
| { |
| DWORD ret = NO_ERROR; |
| GAService *service = &ga_state->service; |
| |
| switch (ctrl) |
| { |
| case SERVICE_CONTROL_STOP: |
| case SERVICE_CONTROL_SHUTDOWN: |
| quit_handler(SIGTERM); |
| SetEvent(ga_state->wakeup_event); |
| service->status.dwCurrentState = SERVICE_STOP_PENDING; |
| SetServiceStatus(service->status_handle, &service->status); |
| break; |
| case SERVICE_CONTROL_DEVICEEVENT: |
| handle_serial_device_events(type, data); |
| break; |
| |
| default: |
| ret = ERROR_CALL_NOT_IMPLEMENTED; |
| } |
| return ret; |
| } |
| |
| VOID WINAPI service_main(DWORD argc, TCHAR *argv[]) |
| { |
| GAService *service = &ga_state->service; |
| |
| service->status_handle = RegisterServiceCtrlHandlerEx(QGA_SERVICE_NAME, |
| service_ctrl_handler, NULL); |
| |
| if (service->status_handle == 0) { |
| g_critical("Failed to register extended requests function!\n"); |
| return; |
| } |
| |
| service->status.dwServiceType = SERVICE_WIN32; |
| service->status.dwCurrentState = SERVICE_RUNNING; |
| service->status.dwControlsAccepted = SERVICE_ACCEPT_STOP | SERVICE_ACCEPT_SHUTDOWN; |
| service->status.dwWin32ExitCode = NO_ERROR; |
| service->status.dwServiceSpecificExitCode = NO_ERROR; |
| service->status.dwCheckPoint = 0; |
| service->status.dwWaitHint = 0; |
| DEV_BROADCAST_DEVICEINTERFACE notification_filter; |
| ZeroMemory(¬ification_filter, sizeof(notification_filter)); |
| notification_filter.dbcc_devicetype = DBT_DEVTYP_DEVICEINTERFACE; |
| notification_filter.dbcc_size = sizeof(DEV_BROADCAST_DEVICEINTERFACE); |
| notification_filter.dbcc_classguid = GUID_VIOSERIAL_PORT; |
| |
| service->device_notification_handle = |
| RegisterDeviceNotification(service->status_handle, |
| ¬ification_filter, DEVICE_NOTIFY_SERVICE_HANDLE); |
| if (!service->device_notification_handle) { |
| g_critical("Failed to register device notification handle!\n"); |
| return; |
| } |
| SetServiceStatus(service->status_handle, &service->status); |
| |
| run_agent(ga_state); |
| |
| UnregisterDeviceNotification(service->device_notification_handle); |
| service->status.dwCurrentState = SERVICE_STOPPED; |
| SetServiceStatus(service->status_handle, &service->status); |
| } |
| #endif |
| |
| static void set_persistent_state_defaults(GAPersistentState *pstate) |
| { |
| g_assert(pstate); |
| pstate->fd_counter = QGA_PSTATE_DEFAULT_FD_COUNTER; |
| } |
| |
| static void persistent_state_from_keyfile(GAPersistentState *pstate, |
| GKeyFile *keyfile) |
| { |
| g_assert(pstate); |
| g_assert(keyfile); |
| /* if any fields are missing, either because the file was tampered with |
| * by agents of chaos, or because the field wasn't present at the time the |
| * file was created, the best we can ever do is start over with the default |
| * values. so load them now, and ignore any errors in accessing key-value |
| * pairs |
| */ |
| set_persistent_state_defaults(pstate); |
| |
| if (g_key_file_has_key(keyfile, "global", "fd_counter", NULL)) { |
| pstate->fd_counter = |
| g_key_file_get_integer(keyfile, "global", "fd_counter", NULL); |
| } |
| } |
| |
| static void persistent_state_to_keyfile(const GAPersistentState *pstate, |
| GKeyFile *keyfile) |
| { |
| g_assert(pstate); |
| g_assert(keyfile); |
| |
| g_key_file_set_integer(keyfile, "global", "fd_counter", pstate->fd_counter); |
| } |
| |
| static gboolean write_persistent_state(const GAPersistentState *pstate, |
| const gchar *path) |
| { |
| GKeyFile *keyfile = g_key_file_new(); |
| GError *gerr = NULL; |
| gboolean ret = true; |
| gchar *data = NULL; |
| gsize data_len; |
| |
| g_assert(pstate); |
| |
| persistent_state_to_keyfile(pstate, keyfile); |
| data = g_key_file_to_data(keyfile, &data_len, &gerr); |
| if (gerr) { |
| g_critical("failed to convert persistent state to string: %s", |
| gerr->message); |
| ret = false; |
| goto out; |
| } |
| |
| g_file_set_contents(path, data, data_len, &gerr); |
| if (gerr) { |
| g_critical("failed to write persistent state to %s: %s", |
| path, gerr->message); |
| ret = false; |
| goto out; |
| } |
| |
| out: |
| if (gerr) { |
| g_error_free(gerr); |
| } |
| if (keyfile) { |
| g_key_file_free(keyfile); |
| } |
| g_free(data); |
| return ret; |
| } |
| |
| static gboolean read_persistent_state(GAPersistentState *pstate, |
| const gchar *path, gboolean frozen) |
| { |
| GKeyFile *keyfile = NULL; |
| GError *gerr = NULL; |
| struct stat st; |
| gboolean ret = true; |
| |
| g_assert(pstate); |
| |
| if (stat(path, &st) == -1) { |
| /* it's okay if state file doesn't exist, but any other error |
| * indicates a permissions issue or some other misconfiguration |
| * that we likely won't be able to recover from. |
| */ |
| if (errno != ENOENT) { |
| g_critical("unable to access state file at path %s: %s", |
| path, strerror(errno)); |
| ret = false; |
| goto out; |
| } |
| |
| /* file doesn't exist. initialize state to default values and |
| * attempt to save now. (we could wait till later when we have |
| * modified state we need to commit, but if there's a problem, |
| * such as a missing parent directory, we want to catch it now) |
| * |
| * there is a potential scenario where someone either managed to |
| * update the agent from a version that didn't use a key store |
| * while qemu-ga thought the filesystem was frozen, or |
| * deleted the key store prior to issuing a fsfreeze, prior |
| * to restarting the agent. in this case we go ahead and defer |
| * initial creation till we actually have modified state to |
| * write, otherwise fail to recover from freeze. |
| */ |
| set_persistent_state_defaults(pstate); |
| if (!frozen) { |
| ret = write_persistent_state(pstate, path); |
| if (!ret) { |
| g_critical("unable to create state file at path %s", path); |
| ret = false; |
| goto out; |
| } |
| } |
| ret = true; |
| goto out; |
| } |
| |
| keyfile = g_key_file_new(); |
| g_key_file_load_from_file(keyfile, path, 0, &gerr); |
| if (gerr) { |
| g_critical("error loading persistent state from path: %s, %s", |
| path, gerr->message); |
| ret = false; |
| goto out; |
| } |
| |
| persistent_state_from_keyfile(pstate, keyfile); |
| |
| out: |
| if (keyfile) { |
| g_key_file_free(keyfile); |
| } |
| if (gerr) { |
| g_error_free(gerr); |
| } |
| |
| return ret; |
| } |
| |
| int64_t ga_get_fd_handle(GAState *s, Error **errp) |
| { |
| int64_t handle; |
| |
| g_assert(s->pstate_filepath); |
| /* we blacklist commands and avoid operations that potentially require |
| * writing to disk when we're in a frozen state. this includes opening |
| * new files, so we should never get here in that situation |
| */ |
| g_assert(!ga_is_frozen(s)); |
| |
| handle = s->pstate.fd_counter++; |
| |
| /* This should never happen on a reasonable timeframe, as guest-file-open |
| * would have to be issued 2^63 times */ |
| if (s->pstate.fd_counter == INT64_MAX) { |
| abort(); |
| } |
| |
| if (!write_persistent_state(&s->pstate, s->pstate_filepath)) { |
| error_setg(errp, "failed to commit persistent state to disk"); |
| return -1; |
| } |
| |
| return handle; |
| } |
| |
| static void ga_print_cmd(const QmpCommand *cmd, void *opaque) |
| { |
| printf("%s\n", qmp_command_name(cmd)); |
| } |
| |
| static GList *split_list(const gchar *str, const gchar *delim) |
| { |
| GList *list = NULL; |
| int i; |
| gchar **strv; |
| |
| strv = g_strsplit(str, delim, -1); |
| for (i = 0; strv[i]; i++) { |
| list = g_list_prepend(list, strv[i]); |
| } |
| g_free(strv); |
| |
| return list; |
| } |
| |
| struct GAConfig { |
| char *channel_path; |
| char *method; |
| char *log_filepath; |
| char *pid_filepath; |
| #ifdef CONFIG_FSFREEZE |
| char *fsfreeze_hook; |
| #endif |
| char *state_dir; |
| #ifdef _WIN32 |
| const char *service; |
| #endif |
| gchar *bliststr; /* blacklist may point to this string */ |
| GList *blacklist; |
| int daemonize; |
| GLogLevelFlags log_level; |
| int dumpconf; |
| bool retry_path; |
| }; |
| |
| static void config_load(GAConfig *config) |
| { |
| GError *gerr = NULL; |
| GKeyFile *keyfile; |
| const char *conf = g_getenv("QGA_CONF") ?: QGA_CONF_DEFAULT; |
| |
| /* read system config */ |
| keyfile = g_key_file_new(); |
| if (!g_key_file_load_from_file(keyfile, conf, 0, &gerr)) { |
| goto end; |
| } |
| if (g_key_file_has_key(keyfile, "general", "daemon", NULL)) { |
| config->daemonize = |
| g_key_file_get_boolean(keyfile, "general", "daemon", &gerr); |
| } |
| if (g_key_file_has_key(keyfile, "general", "method", NULL)) { |
| config->method = |
| g_key_file_get_string(keyfile, "general", "method", &gerr); |
| } |
| if (g_key_file_has_key(keyfile, "general", "path", NULL)) { |
| config->channel_path = |
| g_key_file_get_string(keyfile, "general", "path", &gerr); |
| } |
| if (g_key_file_has_key(keyfile, "general", "logfile", NULL)) { |
| config->log_filepath = |
| g_key_file_get_string(keyfile, "general", "logfile", &gerr); |
| } |
| if (g_key_file_has_key(keyfile, "general", "pidfile", NULL)) { |
| config->pid_filepath = |
| g_key_file_get_string(keyfile, "general", "pidfile", &gerr); |
| } |
| #ifdef CONFIG_FSFREEZE |
| if (g_key_file_has_key(keyfile, "general", "fsfreeze-hook", NULL)) { |
| config->fsfreeze_hook = |
| g_key_file_get_string(keyfile, |
| "general", "fsfreeze-hook", &gerr); |
| } |
| #endif |
| if (g_key_file_has_key(keyfile, "general", "statedir", NULL)) { |
| config->state_dir = |
| g_key_file_get_string(keyfile, "general", "statedir", &gerr); |
| } |
| if (g_key_file_has_key(keyfile, "general", "verbose", NULL) && |
| g_key_file_get_boolean(keyfile, "general", "verbose", &gerr)) { |
| /* enable all log levels */ |
| config->log_level = G_LOG_LEVEL_MASK; |
| } |
| if (g_key_file_has_key(keyfile, "general", "retry-path", NULL)) { |
| config->retry_path = |
| g_key_file_get_boolean(keyfile, "general", "retry-path", &gerr); |
| } |
| if (g_key_file_has_key(keyfile, "general", "blacklist", NULL)) { |
| config->bliststr = |
| g_key_file_get_string(keyfile, "general", "blacklist", &gerr); |
| config->blacklist = g_list_concat(config->blacklist, |
| split_list(config->bliststr, ",")); |
| } |
| |
| end: |
| g_key_file_free(keyfile); |
| if (gerr && |
| !(gerr->domain == G_FILE_ERROR && gerr->code == G_FILE_ERROR_NOENT)) { |
| g_critical("error loading configuration from path: %s, %s", |
| QGA_CONF_DEFAULT, gerr->message); |
| exit(EXIT_FAILURE); |
| } |
| g_clear_error(&gerr); |
| } |
| |
| static gchar *list_join(GList *list, const gchar separator) |
| { |
| GString *str = g_string_new(""); |
| |
| while (list) { |
| str = g_string_append(str, (gchar *)list->data); |
| list = g_list_next(list); |
| if (list) { |
| str = g_string_append_c(str, separator); |
| } |
| } |
| |
| return g_string_free(str, FALSE); |
| } |
| |
| static void config_dump(GAConfig *config) |
| { |
| GError *error = NULL; |
| GKeyFile *keyfile; |
| gchar *tmp; |
| |
| keyfile = g_key_file_new(); |
| g_assert(keyfile); |
| |
| g_key_file_set_boolean(keyfile, "general", "daemon", config->daemonize); |
| g_key_file_set_string(keyfile, "general", "method", config->method); |
| if (config->channel_path) { |
| g_key_file_set_string(keyfile, "general", "path", config->channel_path); |
| } |
| if (config->log_filepath) { |
| g_key_file_set_string(keyfile, "general", "logfile", |
| config->log_filepath); |
| } |
| g_key_file_set_string(keyfile, "general", "pidfile", config->pid_filepath); |
| #ifdef CONFIG_FSFREEZE |
| if (config->fsfreeze_hook) { |
| g_key_file_set_string(keyfile, "general", "fsfreeze-hook", |
| config->fsfreeze_hook); |
| } |
| #endif |
| g_key_file_set_string(keyfile, "general", "statedir", config->state_dir); |
| g_key_file_set_boolean(keyfile, "general", "verbose", |
| config->log_level == G_LOG_LEVEL_MASK); |
| g_key_file_set_boolean(keyfile, "general", "retry-path", |
| config->retry_path); |
| tmp = list_join(config->blacklist, ','); |
| g_key_file_set_string(keyfile, "general", "blacklist", tmp); |
| g_free(tmp); |
| |
| tmp = g_key_file_to_data(keyfile, NULL, &error); |
| if (error) { |
| g_critical("Failed to dump keyfile: %s", error->message); |
| g_clear_error(&error); |
| } else { |
| printf("%s", tmp); |
| } |
| |
| g_free(tmp); |
| g_key_file_free(keyfile); |
| } |
| |
| static void config_parse(GAConfig *config, int argc, char **argv) |
| { |
| const char *sopt = "hVvdm:p:l:f:F::b:s:t:Dr"; |
| int opt_ind = 0, ch; |
| const struct option lopt[] = { |
| { "help", 0, NULL, 'h' }, |
| { "version", 0, NULL, 'V' }, |
| { "dump-conf", 0, NULL, 'D' }, |
| { "logfile", 1, NULL, 'l' }, |
| { "pidfile", 1, NULL, 'f' }, |
| #ifdef CONFIG_FSFREEZE |
| { "fsfreeze-hook", 2, NULL, 'F' }, |
| #endif |
| { "verbose", 0, NULL, 'v' }, |
| { "method", 1, NULL, 'm' }, |
| { "path", 1, NULL, 'p' }, |
| { "daemonize", 0, NULL, 'd' }, |
| { "blacklist", 1, NULL, 'b' }, |
| #ifdef _WIN32 |
| { "service", 1, NULL, 's' }, |
| #endif |
| { "statedir", 1, NULL, 't' }, |
| { "retry-path", 0, NULL, 'r' }, |
| { NULL, 0, NULL, 0 } |
| }; |
| |
| while ((ch = getopt_long(argc, argv, sopt, lopt, &opt_ind)) != -1) { |
| switch (ch) { |
| case 'm': |
| g_free(config->method); |
| config->method = g_strdup(optarg); |
| break; |
| case 'p': |
| g_free(config->channel_path); |
| config->channel_path = g_strdup(optarg); |
| break; |
| case 'l': |
| g_free(config->log_filepath); |
| config->log_filepath = g_strdup(optarg); |
| break; |
| case 'f': |
| g_free(config->pid_filepath); |
| config->pid_filepath = g_strdup(optarg); |
| break; |
| #ifdef CONFIG_FSFREEZE |
| case 'F': |
| g_free(config->fsfreeze_hook); |
| config->fsfreeze_hook = g_strdup(optarg ?: QGA_FSFREEZE_HOOK_DEFAULT); |
| break; |
| #endif |
| case 't': |
| g_free(config->state_dir); |
| config->state_dir = g_strdup(optarg); |
| break; |
| case 'v': |
| /* enable all log levels */ |
| config->log_level = G_LOG_LEVEL_MASK; |
| break; |
| case 'V': |
| printf("QEMU Guest Agent %s\n", QEMU_VERSION); |
| exit(EXIT_SUCCESS); |
| case 'd': |
| config->daemonize = 1; |
| break; |
| case 'D': |
| config->dumpconf = 1; |
| break; |
| case 'r': |
| config->retry_path = true; |
| break; |
| case 'b': { |
| if (is_help_option(optarg)) { |
| qmp_for_each_command(&ga_commands, ga_print_cmd, NULL); |
| exit(EXIT_SUCCESS); |
| } |
| config->blacklist = g_list_concat(config->blacklist, |
| split_list(optarg, ",")); |
| break; |
| } |
| #ifdef _WIN32 |
| case 's': |
| config->service = optarg; |
| if (strcmp(config->service, "install") == 0) { |
| if (ga_install_vss_provider()) { |
| exit(EXIT_FAILURE); |
| } |
| if (ga_install_service(config->channel_path, |
| config->log_filepath, config->state_dir)) { |
| exit(EXIT_FAILURE); |
| } |
| exit(EXIT_SUCCESS); |
| } else if (strcmp(config->service, "uninstall") == 0) { |
| ga_uninstall_vss_provider(); |
| exit(ga_uninstall_service()); |
| } else if (strcmp(config->service, "vss-install") == 0) { |
| if (ga_install_vss_provider()) { |
| exit(EXIT_FAILURE); |
| } |
| exit(EXIT_SUCCESS); |
| } else if (strcmp(config->service, "vss-uninstall") == 0) { |
| ga_uninstall_vss_provider(); |
| exit(EXIT_SUCCESS); |
| } else { |
| printf("Unknown service command.\n"); |
| exit(EXIT_FAILURE); |
| } |
| break; |
| #endif |
| case 'h': |
| usage(argv[0]); |
| exit(EXIT_SUCCESS); |
| case '?': |
| g_print("Unknown option, try '%s --help' for more information.\n", |
| argv[0]); |
| exit(EXIT_FAILURE); |
| } |
| } |
| } |
| |
| static void config_free(GAConfig *config) |
| { |
| g_free(config->method); |
| g_free(config->log_filepath); |
| g_free(config->pid_filepath); |
| g_free(config->state_dir); |
| g_free(config->channel_path); |
| g_free(config->bliststr); |
| #ifdef CONFIG_FSFREEZE |
| g_free(config->fsfreeze_hook); |
| #endif |
| g_list_free_full(config->blacklist, g_free); |
| g_free(config); |
| } |
| |
| static bool check_is_frozen(GAState *s) |
| { |
| #ifndef _WIN32 |
| /* check if a previous instance of qemu-ga exited with filesystems' state |
| * marked as frozen. this could be a stale value (a non-qemu-ga process |
| * or reboot may have since unfrozen them), but better to require an |
| * uneeded unfreeze than to risk hanging on start-up |
| */ |
| struct stat st; |
| if (stat(s->state_filepath_isfrozen, &st) == -1) { |
| /* it's okay if the file doesn't exist, but if we can't access for |
| * some other reason, such as permissions, there's a configuration |
| * that needs to be addressed. so just bail now before we get into |
| * more trouble later |
| */ |
| if (errno != ENOENT) { |
| g_critical("unable to access state file at path %s: %s", |
| s->state_filepath_isfrozen, strerror(errno)); |
| return EXIT_FAILURE; |
| } |
| } else { |
| g_warning("previous instance appears to have exited with frozen" |
| " filesystems. deferring logging/pidfile creation and" |
| " disabling non-fsfreeze-safe commands until" |
| " guest-fsfreeze-thaw is issued, or filesystems are" |
| " manually unfrozen and the file %s is removed", |
| s->state_filepath_isfrozen); |
| return true; |
| } |
| #endif |
| return false; |
| } |
| |
| static GAState *initialize_agent(GAConfig *config, int socket_activation) |
| { |
| GAState *s = g_new0(GAState, 1); |
| |
| g_assert(ga_state == NULL); |
| |
| s->log_level = config->log_level; |
| s->log_file = stderr; |
| #ifdef CONFIG_FSFREEZE |
| s->fsfreeze_hook = config->fsfreeze_hook; |
| #endif |
| s->pstate_filepath = g_strdup_printf("%s/qga.state", config->state_dir); |
| s->state_filepath_isfrozen = g_strdup_printf("%s/qga.state.isfrozen", |
| config->state_dir); |
| s->frozen = check_is_frozen(s); |
| |
| g_log_set_default_handler(ga_log, s); |
| g_log_set_fatal_mask(NULL, G_LOG_LEVEL_ERROR); |
| ga_enable_logging(s); |
| |
| #ifdef _WIN32 |
| /* On win32 the state directory is application specific (be it the default |
| * or a user override). We got past the command line parsing; let's create |
| * the directory (with any intermediate directories). If we run into an |
| * error later on, we won't try to clean up the directory, it is considered |
| * persistent. |
| */ |
| if (g_mkdir_with_parents(config->state_dir, S_IRWXU) == -1) { |
| g_critical("unable to create (an ancestor of) the state directory" |
| " '%s': %s", config->state_dir, strerror(errno)); |
| return NULL; |
| } |
| #endif |
| |
| if (ga_is_frozen(s)) { |
| if (config->daemonize) { |
| /* delay opening/locking of pidfile till filesystems are unfrozen */ |
| s->deferred_options.pid_filepath = config->pid_filepath; |
| become_daemon(NULL); |
| } |
| if (config->log_filepath) { |
| /* delay opening the log file till filesystems are unfrozen */ |
| s->deferred_options.log_filepath = config->log_filepath; |
| } |
| ga_disable_logging(s); |
| qmp_for_each_command(&ga_commands, ga_disable_non_whitelisted, NULL); |
| } else { |
| if (config->daemonize) { |
| become_daemon(config->pid_filepath); |
| } |
| if (config->log_filepath) { |
| FILE *log_file = ga_open_logfile(config->log_filepath); |
| if (!log_file) { |
| g_critical("unable to open specified log file: %s", |
| strerror(errno)); |
| return NULL; |
| } |
| s->log_file = log_file; |
| } |
| } |
| |
| /* load persistent state from disk */ |
| if (!read_persistent_state(&s->pstate, |
| s->pstate_filepath, |
| ga_is_frozen(s))) { |
| g_critical("failed to load persistent state"); |
| return NULL; |
| } |
| |
| config->blacklist = ga_command_blacklist_init(config->blacklist); |
| if (config->blacklist) { |
| GList *l = config->blacklist; |
| s->blacklist = config->blacklist; |
| do { |
| g_debug("disabling command: %s", (char *)l->data); |
| qmp_disable_command(&ga_commands, l->data); |
| l = g_list_next(l); |
| } while (l); |
| } |
| s->command_state = ga_command_state_new(); |
| ga_command_state_init(s, s->command_state); |
| ga_command_state_init_all(s->command_state); |
| json_message_parser_init(&s->parser, process_event, s, NULL); |
| |
| #ifndef _WIN32 |
| if (!register_signal_handlers()) { |
| g_critical("failed to register signal handlers"); |
| return NULL; |
| } |
| #endif |
| |
| s->main_loop = g_main_loop_new(NULL, false); |
| |
| s->config = config; |
| s->socket_activation = socket_activation; |
| |
| #ifdef _WIN32 |
| s->wakeup_event = CreateEvent(NULL, TRUE, FALSE, TEXT("WakeUp")); |
| if (s->wakeup_event == NULL) { |
| g_critical("CreateEvent failed"); |
| return NULL; |
| } |
| #endif |
| |
| ga_state = s; |
| return s; |
| } |
| |
| static void cleanup_agent(GAState *s) |
| { |
| #ifdef _WIN32 |
| CloseHandle(s->wakeup_event); |
| #endif |
| if (s->command_state) { |
| ga_command_state_cleanup_all(s->command_state); |
| ga_command_state_free(s->command_state); |
| json_message_parser_destroy(&s->parser); |
| } |
| g_free(s->pstate_filepath); |
| g_free(s->state_filepath_isfrozen); |
| if (s->main_loop) { |
| g_main_loop_unref(s->main_loop); |
| } |
| g_free(s); |
| ga_state = NULL; |
| } |
| |
| static int run_agent_once(GAState *s) |
| { |
| if (!channel_init(s, s->config->method, s->config->channel_path, |
| s->socket_activation ? FIRST_SOCKET_ACTIVATION_FD : -1)) { |
| g_critical("failed to initialize guest agent channel"); |
| return EXIT_FAILURE; |
| } |
| |
| g_main_loop_run(ga_state->main_loop); |
| |
| if (s->channel) { |
| ga_channel_free(s->channel); |
| } |
| |
| return EXIT_SUCCESS; |
| } |
| |
| static void wait_for_channel_availability(GAState *s) |
| { |
| g_warning("waiting for channel path..."); |
| #ifndef _WIN32 |
| sleep(QGA_RETRY_INTERVAL); |
| #else |
| DWORD dwWaitResult; |
| |
| dwWaitResult = WaitForSingleObject(s->wakeup_event, INFINITE); |
| |
| switch (dwWaitResult) { |
| case WAIT_OBJECT_0: |
| break; |
| case WAIT_TIMEOUT: |
| break; |
| default: |
| g_critical("WaitForSingleObject failed"); |
| } |
| #endif |
| } |
| |
| static int run_agent(GAState *s) |
| { |
| int ret = EXIT_SUCCESS; |
| |
| s->force_exit = false; |
| |
| do { |
| ret = run_agent_once(s); |
| if (s->config->retry_path && !s->force_exit) { |
| g_warning("agent stopped unexpectedly, restarting..."); |
| wait_for_channel_availability(s); |
| } |
| } while (s->config->retry_path && !s->force_exit); |
| |
| return ret; |
| } |
| |
| static void stop_agent(GAState *s, bool requested) |
| { |
| if (!s->force_exit) { |
| s->force_exit = requested; |
| } |
| |
| if (g_main_loop_is_running(s->main_loop)) { |
| g_main_loop_quit(s->main_loop); |
| } |
| } |
| |
| int main(int argc, char **argv) |
| { |
| int ret = EXIT_SUCCESS; |
| GAState *s; |
| GAConfig *config = g_new0(GAConfig, 1); |
| int socket_activation; |
| |
| config->log_level = G_LOG_LEVEL_ERROR | G_LOG_LEVEL_CRITICAL; |
| |
| qga_qmp_init_marshal(&ga_commands); |
| |
| init_dfl_pathnames(); |
| config_load(config); |
| config_parse(config, argc, argv); |
| |
| if (config->pid_filepath == NULL) { |
| config->pid_filepath = g_strdup(dfl_pathnames.pidfile); |
| } |
| |
| if (config->state_dir == NULL) { |
| config->state_dir = g_strdup(dfl_pathnames.state_dir); |
| } |
| |
| if (config->method == NULL) { |
| config->method = g_strdup("virtio-serial"); |
| } |
| |
| socket_activation = check_socket_activation(); |
| if (socket_activation > 1) { |
| g_critical("qemu-ga only supports listening on one socket"); |
| ret = EXIT_FAILURE; |
| goto end; |
| } |
| if (socket_activation) { |
| SocketAddress *addr; |
| |
| g_free(config->method); |
| g_free(config->channel_path); |
| config->method = NULL; |
| config->channel_path = NULL; |
| |
| addr = socket_local_address(FIRST_SOCKET_ACTIVATION_FD, NULL); |
| if (addr) { |
| if (addr->type == SOCKET_ADDRESS_TYPE_UNIX) { |
| config->method = g_strdup("unix-listen"); |
| } else if (addr->type == SOCKET_ADDRESS_TYPE_VSOCK) { |
| config->method = g_strdup("vsock-listen"); |
| } |
| |
| qapi_free_SocketAddress(addr); |
| } |
| |
| if (!config->method) { |
| g_critical("unsupported listen fd type"); |
| ret = EXIT_FAILURE; |
| goto end; |
| } |
| } else if (config->channel_path == NULL) { |
| if (strcmp(config->method, "virtio-serial") == 0) { |
| /* try the default path for the virtio-serial port */ |
| config->channel_path = g_strdup(QGA_VIRTIO_PATH_DEFAULT); |
| } else if (strcmp(config->method, "isa-serial") == 0) { |
| /* try the default path for the serial port - COM1 */ |
| config->channel_path = g_strdup(QGA_SERIAL_PATH_DEFAULT); |
| } else { |
| g_critical("must specify a path for this channel"); |
| ret = EXIT_FAILURE; |
| goto end; |
| } |
| } |
| |
| if (config->dumpconf) { |
| config_dump(config); |
| goto end; |
| } |
| |
| s = initialize_agent(config, socket_activation); |
| if (!s) { |
| g_critical("error initializing guest agent"); |
| goto end; |
| } |
| |
| #ifdef _WIN32 |
| if (config->daemonize) { |
| SERVICE_TABLE_ENTRY service_table[] = { |
| { (char *)QGA_SERVICE_NAME, service_main }, { NULL, NULL } }; |
| StartServiceCtrlDispatcher(service_table); |
| } else { |
| ret = run_agent(s); |
| } |
| #else |
| ret = run_agent(s); |
| #endif |
| |
| cleanup_agent(s); |
| |
| end: |
| if (config->daemonize) { |
| unlink(config->pid_filepath); |
| } |
| |
| config_free(config); |
| |
| return ret; |
| } |