qapi2texi: Fix up output around #optional
[qemu.git] / qga / main.c
1 /*
2 * QEMU Guest Agent
3 *
4 * Copyright IBM Corp. 2011
5 *
6 * Authors:
7 * Adam Litke <aglitke@linux.vnet.ibm.com>
8 * Michael Roth <mdroth@linux.vnet.ibm.com>
9 *
10 * This work is licensed under the terms of the GNU GPL, version 2 or later.
11 * See the COPYING file in the top-level directory.
12 */
13 #include "qemu/osdep.h"
14 #include <getopt.h>
15 #include <glib/gstdio.h>
16 #ifndef _WIN32
17 #include <syslog.h>
18 #include <sys/wait.h>
19 #endif
20 #include "qapi/qmp/json-streamer.h"
21 #include "qapi/qmp/json-parser.h"
22 #include "qapi/qmp/qint.h"
23 #include "qapi/qmp/qjson.h"
24 #include "qga/guest-agent-core.h"
25 #include "qemu/module.h"
26 #include "qapi/qmp/qerror.h"
27 #include "qapi/qmp/dispatch.h"
28 #include "qga/channel.h"
29 #include "qemu/bswap.h"
30 #include "qemu/help_option.h"
31 #include "qemu/sockets.h"
32 #ifdef _WIN32
33 #include "qga/service-win32.h"
34 #include "qga/vss-win32.h"
35 #endif
36 #ifdef __linux__
37 #include <linux/fs.h>
38 #ifdef FIFREEZE
39 #define CONFIG_FSFREEZE
40 #endif
41 #endif
42
43 #ifndef _WIN32
44 #define QGA_VIRTIO_PATH_DEFAULT "/dev/virtio-ports/org.qemu.guest_agent.0"
45 #define QGA_STATE_RELATIVE_DIR "run"
46 #define QGA_SERIAL_PATH_DEFAULT "/dev/ttyS0"
47 #else
48 #define QGA_VIRTIO_PATH_DEFAULT "\\\\.\\Global\\org.qemu.guest_agent.0"
49 #define QGA_STATE_RELATIVE_DIR "qemu-ga"
50 #define QGA_SERIAL_PATH_DEFAULT "COM1"
51 #endif
52 #ifdef CONFIG_FSFREEZE
53 #define QGA_FSFREEZE_HOOK_DEFAULT CONFIG_QEMU_CONFDIR "/fsfreeze-hook"
54 #endif
55 #define QGA_SENTINEL_BYTE 0xFF
56 #define QGA_CONF_DEFAULT CONFIG_QEMU_CONFDIR G_DIR_SEPARATOR_S "qemu-ga.conf"
57
58 static struct {
59 const char *state_dir;
60 const char *pidfile;
61 } dfl_pathnames;
62
63 typedef struct GAPersistentState {
64 #define QGA_PSTATE_DEFAULT_FD_COUNTER 1000
65 int64_t fd_counter;
66 } GAPersistentState;
67
68 struct GAState {
69 JSONMessageParser parser;
70 GMainLoop *main_loop;
71 GAChannel *channel;
72 bool virtio; /* fastpath to check for virtio to deal with poll() quirks */
73 GACommandState *command_state;
74 GLogLevelFlags log_level;
75 FILE *log_file;
76 bool logging_enabled;
77 #ifdef _WIN32
78 GAService service;
79 #endif
80 bool delimit_response;
81 bool frozen;
82 GList *blacklist;
83 char *state_filepath_isfrozen;
84 struct {
85 const char *log_filepath;
86 const char *pid_filepath;
87 } deferred_options;
88 #ifdef CONFIG_FSFREEZE
89 const char *fsfreeze_hook;
90 #endif
91 gchar *pstate_filepath;
92 GAPersistentState pstate;
93 };
94
95 struct GAState *ga_state;
96 QmpCommandList ga_commands;
97
98 /* commands that are safe to issue while filesystems are frozen */
99 static const char *ga_freeze_whitelist[] = {
100 "guest-ping",
101 "guest-info",
102 "guest-sync",
103 "guest-sync-delimited",
104 "guest-fsfreeze-status",
105 "guest-fsfreeze-thaw",
106 NULL
107 };
108
109 #ifdef _WIN32
110 DWORD WINAPI service_ctrl_handler(DWORD ctrl, DWORD type, LPVOID data,
111 LPVOID ctx);
112 VOID WINAPI service_main(DWORD argc, TCHAR *argv[]);
113 #endif
114
115 static void
116 init_dfl_pathnames(void)
117 {
118 g_assert(dfl_pathnames.state_dir == NULL);
119 g_assert(dfl_pathnames.pidfile == NULL);
120 dfl_pathnames.state_dir = qemu_get_local_state_pathname(
121 QGA_STATE_RELATIVE_DIR);
122 dfl_pathnames.pidfile = qemu_get_local_state_pathname(
123 QGA_STATE_RELATIVE_DIR G_DIR_SEPARATOR_S "qemu-ga.pid");
124 }
125
126 static void quit_handler(int sig)
127 {
128 /* if we're frozen, don't exit unless we're absolutely forced to,
129 * because it's basically impossible for graceful exit to complete
130 * unless all log/pid files are on unfreezable filesystems. there's
131 * also a very likely chance killing the agent before unfreezing
132 * the filesystems is a mistake (or will be viewed as one later).
133 */
134 if (ga_is_frozen(ga_state)) {
135 return;
136 }
137 g_debug("received signal num %d, quitting", sig);
138
139 if (g_main_loop_is_running(ga_state->main_loop)) {
140 g_main_loop_quit(ga_state->main_loop);
141 }
142 }
143
144 #ifndef _WIN32
145 static gboolean register_signal_handlers(void)
146 {
147 struct sigaction sigact;
148 int ret;
149
150 memset(&sigact, 0, sizeof(struct sigaction));
151 sigact.sa_handler = quit_handler;
152
153 ret = sigaction(SIGINT, &sigact, NULL);
154 if (ret == -1) {
155 g_error("error configuring signal handler: %s", strerror(errno));
156 }
157 ret = sigaction(SIGTERM, &sigact, NULL);
158 if (ret == -1) {
159 g_error("error configuring signal handler: %s", strerror(errno));
160 }
161
162 sigact.sa_handler = SIG_IGN;
163 if (sigaction(SIGPIPE, &sigact, NULL) != 0) {
164 g_error("error configuring SIGPIPE signal handler: %s",
165 strerror(errno));
166 }
167
168 return true;
169 }
170
171 /* TODO: use this in place of all post-fork() fclose(std*) callers */
172 void reopen_fd_to_null(int fd)
173 {
174 int nullfd;
175
176 nullfd = open("/dev/null", O_RDWR);
177 if (nullfd < 0) {
178 return;
179 }
180
181 dup2(nullfd, fd);
182
183 if (nullfd != fd) {
184 close(nullfd);
185 }
186 }
187 #endif
188
189 /**
190 * get_listen_fd:
191 * @consume: true to prevent future calls from succeeding
192 *
193 * Fetch a listen file descriptor that was passed via systemd socket
194 * activation. Use @consume to prevent child processes from thinking a file
195 * descriptor was passed.
196 *
197 * Returns: file descriptor or -1 if no fd was passed
198 */
199 static int get_listen_fd(bool consume)
200 {
201 #ifdef _WIN32
202 return -1; /* no fd passing expected, unsetenv(3) not available */
203 #else
204 const char *listen_fds = getenv("LISTEN_FDS");
205 int fd = STDERR_FILENO + 1;
206
207 if (!listen_fds || strcmp(listen_fds, "1") != 0) {
208 return -1;
209 }
210
211 if (consume) {
212 unsetenv("LISTEN_FDS");
213 }
214
215 qemu_set_cloexec(fd);
216 return fd;
217 #endif /* !_WIN32 */
218 }
219
220 static void usage(const char *cmd)
221 {
222 printf(
223 "Usage: %s [-m <method> -p <path>] [<options>]\n"
224 "QEMU Guest Agent %s\n"
225 "\n"
226 " -m, --method transport method: one of unix-listen, virtio-serial,\n"
227 " isa-serial, or vsock-listen (virtio-serial is the default)\n"
228 " -p, --path device/socket path (the default for virtio-serial is:\n"
229 " %s,\n"
230 " the default for isa-serial is:\n"
231 " %s)\n"
232 " -l, --logfile set logfile path, logs to stderr by default\n"
233 " -f, --pidfile specify pidfile (default is %s)\n"
234 #ifdef CONFIG_FSFREEZE
235 " -F, --fsfreeze-hook\n"
236 " enable fsfreeze hook. Accepts an optional argument that\n"
237 " specifies script to run on freeze/thaw. Script will be\n"
238 " called with 'freeze'/'thaw' arguments accordingly.\n"
239 " (default is %s)\n"
240 " If using -F with an argument, do not follow -F with a\n"
241 " space.\n"
242 " (for example: -F/var/run/fsfreezehook.sh)\n"
243 #endif
244 " -t, --statedir specify dir to store state information (absolute paths\n"
245 " only, default is %s)\n"
246 " -v, --verbose log extra debugging information\n"
247 " -V, --version print version information and exit\n"
248 " -d, --daemonize become a daemon\n"
249 #ifdef _WIN32
250 " -s, --service service commands: install, uninstall, vss-install, vss-uninstall\n"
251 #endif
252 " -b, --blacklist comma-separated list of RPCs to disable (no spaces, \"?\"\n"
253 " to list available RPCs)\n"
254 " -D, --dump-conf dump a qemu-ga config file based on current config\n"
255 " options / command-line parameters to stdout\n"
256 " -h, --help display this help and exit\n"
257 "\n"
258 "Report bugs to <mdroth@linux.vnet.ibm.com>\n"
259 , cmd, QEMU_VERSION, QGA_VIRTIO_PATH_DEFAULT, QGA_SERIAL_PATH_DEFAULT,
260 dfl_pathnames.pidfile,
261 #ifdef CONFIG_FSFREEZE
262 QGA_FSFREEZE_HOOK_DEFAULT,
263 #endif
264 dfl_pathnames.state_dir);
265 }
266
267 static const char *ga_log_level_str(GLogLevelFlags level)
268 {
269 switch (level & G_LOG_LEVEL_MASK) {
270 case G_LOG_LEVEL_ERROR:
271 return "error";
272 case G_LOG_LEVEL_CRITICAL:
273 return "critical";
274 case G_LOG_LEVEL_WARNING:
275 return "warning";
276 case G_LOG_LEVEL_MESSAGE:
277 return "message";
278 case G_LOG_LEVEL_INFO:
279 return "info";
280 case G_LOG_LEVEL_DEBUG:
281 return "debug";
282 default:
283 return "user";
284 }
285 }
286
287 bool ga_logging_enabled(GAState *s)
288 {
289 return s->logging_enabled;
290 }
291
292 void ga_disable_logging(GAState *s)
293 {
294 s->logging_enabled = false;
295 }
296
297 void ga_enable_logging(GAState *s)
298 {
299 s->logging_enabled = true;
300 }
301
302 static void ga_log(const gchar *domain, GLogLevelFlags level,
303 const gchar *msg, gpointer opaque)
304 {
305 GAState *s = opaque;
306 GTimeVal time;
307 const char *level_str = ga_log_level_str(level);
308
309 if (!ga_logging_enabled(s)) {
310 return;
311 }
312
313 level &= G_LOG_LEVEL_MASK;
314 #ifndef _WIN32
315 if (g_strcmp0(domain, "syslog") == 0) {
316 syslog(LOG_INFO, "%s: %s", level_str, msg);
317 } else if (level & s->log_level) {
318 #else
319 if (level & s->log_level) {
320 #endif
321 g_get_current_time(&time);
322 fprintf(s->log_file,
323 "%lu.%lu: %s: %s\n", time.tv_sec, time.tv_usec, level_str, msg);
324 fflush(s->log_file);
325 }
326 }
327
328 void ga_set_response_delimited(GAState *s)
329 {
330 s->delimit_response = true;
331 }
332
333 static FILE *ga_open_logfile(const char *logfile)
334 {
335 FILE *f;
336
337 f = fopen(logfile, "a");
338 if (!f) {
339 return NULL;
340 }
341
342 qemu_set_cloexec(fileno(f));
343 return f;
344 }
345
346 #ifndef _WIN32
347 static bool ga_open_pidfile(const char *pidfile)
348 {
349 int pidfd;
350 char pidstr[32];
351
352 pidfd = qemu_open(pidfile, O_CREAT|O_WRONLY, S_IRUSR|S_IWUSR);
353 if (pidfd == -1 || lockf(pidfd, F_TLOCK, 0)) {
354 g_critical("Cannot lock pid file, %s", strerror(errno));
355 if (pidfd != -1) {
356 close(pidfd);
357 }
358 return false;
359 }
360
361 if (ftruncate(pidfd, 0)) {
362 g_critical("Failed to truncate pid file");
363 goto fail;
364 }
365 snprintf(pidstr, sizeof(pidstr), "%d\n", getpid());
366 if (write(pidfd, pidstr, strlen(pidstr)) != strlen(pidstr)) {
367 g_critical("Failed to write pid file");
368 goto fail;
369 }
370
371 /* keep pidfile open & locked forever */
372 return true;
373
374 fail:
375 unlink(pidfile);
376 close(pidfd);
377 return false;
378 }
379 #else /* _WIN32 */
380 static bool ga_open_pidfile(const char *pidfile)
381 {
382 return true;
383 }
384 #endif
385
386 static gint ga_strcmp(gconstpointer str1, gconstpointer str2)
387 {
388 return strcmp(str1, str2);
389 }
390
391 /* disable commands that aren't safe for fsfreeze */
392 static void ga_disable_non_whitelisted(QmpCommand *cmd, void *opaque)
393 {
394 bool whitelisted = false;
395 int i = 0;
396 const char *name = qmp_command_name(cmd);
397
398 while (ga_freeze_whitelist[i] != NULL) {
399 if (strcmp(name, ga_freeze_whitelist[i]) == 0) {
400 whitelisted = true;
401 }
402 i++;
403 }
404 if (!whitelisted) {
405 g_debug("disabling command: %s", name);
406 qmp_disable_command(&ga_commands, name);
407 }
408 }
409
410 /* [re-]enable all commands, except those explicitly blacklisted by user */
411 static void ga_enable_non_blacklisted(QmpCommand *cmd, void *opaque)
412 {
413 GList *blacklist = opaque;
414 const char *name = qmp_command_name(cmd);
415
416 if (g_list_find_custom(blacklist, name, ga_strcmp) == NULL &&
417 !qmp_command_is_enabled(cmd)) {
418 g_debug("enabling command: %s", name);
419 qmp_enable_command(&ga_commands, name);
420 }
421 }
422
423 static bool ga_create_file(const char *path)
424 {
425 int fd = open(path, O_CREAT | O_WRONLY, S_IWUSR | S_IRUSR);
426 if (fd == -1) {
427 g_warning("unable to open/create file %s: %s", path, strerror(errno));
428 return false;
429 }
430 close(fd);
431 return true;
432 }
433
434 static bool ga_delete_file(const char *path)
435 {
436 int ret = unlink(path);
437 if (ret == -1) {
438 g_warning("unable to delete file: %s: %s", path, strerror(errno));
439 return false;
440 }
441
442 return true;
443 }
444
445 bool ga_is_frozen(GAState *s)
446 {
447 return s->frozen;
448 }
449
450 void ga_set_frozen(GAState *s)
451 {
452 if (ga_is_frozen(s)) {
453 return;
454 }
455 /* disable all non-whitelisted (for frozen state) commands */
456 qmp_for_each_command(&ga_commands, ga_disable_non_whitelisted, NULL);
457 g_warning("disabling logging due to filesystem freeze");
458 ga_disable_logging(s);
459 s->frozen = true;
460 if (!ga_create_file(s->state_filepath_isfrozen)) {
461 g_warning("unable to create %s, fsfreeze may not function properly",
462 s->state_filepath_isfrozen);
463 }
464 }
465
466 void ga_unset_frozen(GAState *s)
467 {
468 if (!ga_is_frozen(s)) {
469 return;
470 }
471
472 /* if we delayed creation/opening of pid/log files due to being
473 * in a frozen state at start up, do it now
474 */
475 if (s->deferred_options.log_filepath) {
476 s->log_file = ga_open_logfile(s->deferred_options.log_filepath);
477 if (!s->log_file) {
478 s->log_file = stderr;
479 }
480 s->deferred_options.log_filepath = NULL;
481 }
482 ga_enable_logging(s);
483 g_warning("logging re-enabled due to filesystem unfreeze");
484 if (s->deferred_options.pid_filepath) {
485 if (!ga_open_pidfile(s->deferred_options.pid_filepath)) {
486 g_warning("failed to create/open pid file");
487 }
488 s->deferred_options.pid_filepath = NULL;
489 }
490
491 /* enable all disabled, non-blacklisted commands */
492 qmp_for_each_command(&ga_commands, ga_enable_non_blacklisted, s->blacklist);
493 s->frozen = false;
494 if (!ga_delete_file(s->state_filepath_isfrozen)) {
495 g_warning("unable to delete %s, fsfreeze may not function properly",
496 s->state_filepath_isfrozen);
497 }
498 }
499
500 #ifdef CONFIG_FSFREEZE
501 const char *ga_fsfreeze_hook(GAState *s)
502 {
503 return s->fsfreeze_hook;
504 }
505 #endif
506
507 static void become_daemon(const char *pidfile)
508 {
509 #ifndef _WIN32
510 pid_t pid, sid;
511
512 pid = fork();
513 if (pid < 0) {
514 exit(EXIT_FAILURE);
515 }
516 if (pid > 0) {
517 exit(EXIT_SUCCESS);
518 }
519
520 if (pidfile) {
521 if (!ga_open_pidfile(pidfile)) {
522 g_critical("failed to create pidfile");
523 exit(EXIT_FAILURE);
524 }
525 }
526
527 umask(S_IRWXG | S_IRWXO);
528 sid = setsid();
529 if (sid < 0) {
530 goto fail;
531 }
532 if ((chdir("/")) < 0) {
533 goto fail;
534 }
535
536 reopen_fd_to_null(STDIN_FILENO);
537 reopen_fd_to_null(STDOUT_FILENO);
538 reopen_fd_to_null(STDERR_FILENO);
539 return;
540
541 fail:
542 if (pidfile) {
543 unlink(pidfile);
544 }
545 g_critical("failed to daemonize");
546 exit(EXIT_FAILURE);
547 #endif
548 }
549
550 static int send_response(GAState *s, QObject *payload)
551 {
552 const char *buf;
553 QString *payload_qstr, *response_qstr;
554 GIOStatus status;
555
556 g_assert(payload && s->channel);
557
558 payload_qstr = qobject_to_json(payload);
559 if (!payload_qstr) {
560 return -EINVAL;
561 }
562
563 if (s->delimit_response) {
564 s->delimit_response = false;
565 response_qstr = qstring_new();
566 qstring_append_chr(response_qstr, QGA_SENTINEL_BYTE);
567 qstring_append(response_qstr, qstring_get_str(payload_qstr));
568 QDECREF(payload_qstr);
569 } else {
570 response_qstr = payload_qstr;
571 }
572
573 qstring_append_chr(response_qstr, '\n');
574 buf = qstring_get_str(response_qstr);
575 status = ga_channel_write_all(s->channel, buf, strlen(buf));
576 QDECREF(response_qstr);
577 if (status != G_IO_STATUS_NORMAL) {
578 return -EIO;
579 }
580
581 return 0;
582 }
583
584 static void process_command(GAState *s, QDict *req)
585 {
586 QObject *rsp = NULL;
587 int ret;
588
589 g_assert(req);
590 g_debug("processing command");
591 rsp = qmp_dispatch(&ga_commands, QOBJECT(req));
592 if (rsp) {
593 ret = send_response(s, rsp);
594 if (ret < 0) {
595 g_warning("error sending response: %s", strerror(-ret));
596 }
597 qobject_decref(rsp);
598 }
599 }
600
601 /* handle requests/control events coming in over the channel */
602 static void process_event(JSONMessageParser *parser, GQueue *tokens)
603 {
604 GAState *s = container_of(parser, GAState, parser);
605 QDict *qdict;
606 Error *err = NULL;
607 int ret;
608
609 g_assert(s && parser);
610
611 g_debug("process_event: called");
612 qdict = qobject_to_qdict(json_parser_parse_err(tokens, NULL, &err));
613 if (err || !qdict) {
614 QDECREF(qdict);
615 qdict = qdict_new();
616 if (!err) {
617 g_warning("failed to parse event: unknown error");
618 error_setg(&err, QERR_JSON_PARSING);
619 } else {
620 g_warning("failed to parse event: %s", error_get_pretty(err));
621 }
622 qdict_put_obj(qdict, "error", qmp_build_error_object(err));
623 error_free(err);
624 }
625
626 /* handle host->guest commands */
627 if (qdict_haskey(qdict, "execute")) {
628 process_command(s, qdict);
629 } else {
630 if (!qdict_haskey(qdict, "error")) {
631 QDECREF(qdict);
632 qdict = qdict_new();
633 g_warning("unrecognized payload format");
634 error_setg(&err, QERR_UNSUPPORTED);
635 qdict_put_obj(qdict, "error", qmp_build_error_object(err));
636 error_free(err);
637 }
638 ret = send_response(s, QOBJECT(qdict));
639 if (ret < 0) {
640 g_warning("error sending error response: %s", strerror(-ret));
641 }
642 }
643
644 QDECREF(qdict);
645 }
646
647 /* false return signals GAChannel to close the current client connection */
648 static gboolean channel_event_cb(GIOCondition condition, gpointer data)
649 {
650 GAState *s = data;
651 gchar buf[QGA_READ_COUNT_DEFAULT+1];
652 gsize count;
653 GIOStatus status = ga_channel_read(s->channel, buf, QGA_READ_COUNT_DEFAULT, &count);
654 switch (status) {
655 case G_IO_STATUS_ERROR:
656 g_warning("error reading channel");
657 return false;
658 case G_IO_STATUS_NORMAL:
659 buf[count] = 0;
660 g_debug("read data, count: %d, data: %s", (int)count, buf);
661 json_message_parser_feed(&s->parser, (char *)buf, (int)count);
662 break;
663 case G_IO_STATUS_EOF:
664 g_debug("received EOF");
665 if (!s->virtio) {
666 return false;
667 }
668 /* fall through */
669 case G_IO_STATUS_AGAIN:
670 /* virtio causes us to spin here when no process is attached to
671 * host-side chardev. sleep a bit to mitigate this
672 */
673 if (s->virtio) {
674 usleep(100*1000);
675 }
676 return true;
677 default:
678 g_warning("unknown channel read status, closing");
679 return false;
680 }
681 return true;
682 }
683
684 static gboolean channel_init(GAState *s, const gchar *method, const gchar *path,
685 int listen_fd)
686 {
687 GAChannelMethod channel_method;
688
689 if (strcmp(method, "virtio-serial") == 0) {
690 s->virtio = true; /* virtio requires special handling in some cases */
691 channel_method = GA_CHANNEL_VIRTIO_SERIAL;
692 } else if (strcmp(method, "isa-serial") == 0) {
693 channel_method = GA_CHANNEL_ISA_SERIAL;
694 } else if (strcmp(method, "unix-listen") == 0) {
695 channel_method = GA_CHANNEL_UNIX_LISTEN;
696 } else if (strcmp(method, "vsock-listen") == 0) {
697 channel_method = GA_CHANNEL_VSOCK_LISTEN;
698 } else {
699 g_critical("unsupported channel method/type: %s", method);
700 return false;
701 }
702
703 s->channel = ga_channel_new(channel_method, path, listen_fd,
704 channel_event_cb, s);
705 if (!s->channel) {
706 g_critical("failed to create guest agent channel");
707 return false;
708 }
709
710 return true;
711 }
712
713 #ifdef _WIN32
714 DWORD WINAPI service_ctrl_handler(DWORD ctrl, DWORD type, LPVOID data,
715 LPVOID ctx)
716 {
717 DWORD ret = NO_ERROR;
718 GAService *service = &ga_state->service;
719
720 switch (ctrl)
721 {
722 case SERVICE_CONTROL_STOP:
723 case SERVICE_CONTROL_SHUTDOWN:
724 quit_handler(SIGTERM);
725 service->status.dwCurrentState = SERVICE_STOP_PENDING;
726 SetServiceStatus(service->status_handle, &service->status);
727 break;
728
729 default:
730 ret = ERROR_CALL_NOT_IMPLEMENTED;
731 }
732 return ret;
733 }
734
735 VOID WINAPI service_main(DWORD argc, TCHAR *argv[])
736 {
737 GAService *service = &ga_state->service;
738
739 service->status_handle = RegisterServiceCtrlHandlerEx(QGA_SERVICE_NAME,
740 service_ctrl_handler, NULL);
741
742 if (service->status_handle == 0) {
743 g_critical("Failed to register extended requests function!\n");
744 return;
745 }
746
747 service->status.dwServiceType = SERVICE_WIN32;
748 service->status.dwCurrentState = SERVICE_RUNNING;
749 service->status.dwControlsAccepted = SERVICE_ACCEPT_STOP | SERVICE_ACCEPT_SHUTDOWN;
750 service->status.dwWin32ExitCode = NO_ERROR;
751 service->status.dwServiceSpecificExitCode = NO_ERROR;
752 service->status.dwCheckPoint = 0;
753 service->status.dwWaitHint = 0;
754 SetServiceStatus(service->status_handle, &service->status);
755
756 g_main_loop_run(ga_state->main_loop);
757
758 service->status.dwCurrentState = SERVICE_STOPPED;
759 SetServiceStatus(service->status_handle, &service->status);
760 }
761 #endif
762
763 static void set_persistent_state_defaults(GAPersistentState *pstate)
764 {
765 g_assert(pstate);
766 pstate->fd_counter = QGA_PSTATE_DEFAULT_FD_COUNTER;
767 }
768
769 static void persistent_state_from_keyfile(GAPersistentState *pstate,
770 GKeyFile *keyfile)
771 {
772 g_assert(pstate);
773 g_assert(keyfile);
774 /* if any fields are missing, either because the file was tampered with
775 * by agents of chaos, or because the field wasn't present at the time the
776 * file was created, the best we can ever do is start over with the default
777 * values. so load them now, and ignore any errors in accessing key-value
778 * pairs
779 */
780 set_persistent_state_defaults(pstate);
781
782 if (g_key_file_has_key(keyfile, "global", "fd_counter", NULL)) {
783 pstate->fd_counter =
784 g_key_file_get_integer(keyfile, "global", "fd_counter", NULL);
785 }
786 }
787
788 static void persistent_state_to_keyfile(const GAPersistentState *pstate,
789 GKeyFile *keyfile)
790 {
791 g_assert(pstate);
792 g_assert(keyfile);
793
794 g_key_file_set_integer(keyfile, "global", "fd_counter", pstate->fd_counter);
795 }
796
797 static gboolean write_persistent_state(const GAPersistentState *pstate,
798 const gchar *path)
799 {
800 GKeyFile *keyfile = g_key_file_new();
801 GError *gerr = NULL;
802 gboolean ret = true;
803 gchar *data = NULL;
804 gsize data_len;
805
806 g_assert(pstate);
807
808 persistent_state_to_keyfile(pstate, keyfile);
809 data = g_key_file_to_data(keyfile, &data_len, &gerr);
810 if (gerr) {
811 g_critical("failed to convert persistent state to string: %s",
812 gerr->message);
813 ret = false;
814 goto out;
815 }
816
817 g_file_set_contents(path, data, data_len, &gerr);
818 if (gerr) {
819 g_critical("failed to write persistent state to %s: %s",
820 path, gerr->message);
821 ret = false;
822 goto out;
823 }
824
825 out:
826 if (gerr) {
827 g_error_free(gerr);
828 }
829 if (keyfile) {
830 g_key_file_free(keyfile);
831 }
832 g_free(data);
833 return ret;
834 }
835
836 static gboolean read_persistent_state(GAPersistentState *pstate,
837 const gchar *path, gboolean frozen)
838 {
839 GKeyFile *keyfile = NULL;
840 GError *gerr = NULL;
841 struct stat st;
842 gboolean ret = true;
843
844 g_assert(pstate);
845
846 if (stat(path, &st) == -1) {
847 /* it's okay if state file doesn't exist, but any other error
848 * indicates a permissions issue or some other misconfiguration
849 * that we likely won't be able to recover from.
850 */
851 if (errno != ENOENT) {
852 g_critical("unable to access state file at path %s: %s",
853 path, strerror(errno));
854 ret = false;
855 goto out;
856 }
857
858 /* file doesn't exist. initialize state to default values and
859 * attempt to save now. (we could wait till later when we have
860 * modified state we need to commit, but if there's a problem,
861 * such as a missing parent directory, we want to catch it now)
862 *
863 * there is a potential scenario where someone either managed to
864 * update the agent from a version that didn't use a key store
865 * while qemu-ga thought the filesystem was frozen, or
866 * deleted the key store prior to issuing a fsfreeze, prior
867 * to restarting the agent. in this case we go ahead and defer
868 * initial creation till we actually have modified state to
869 * write, otherwise fail to recover from freeze.
870 */
871 set_persistent_state_defaults(pstate);
872 if (!frozen) {
873 ret = write_persistent_state(pstate, path);
874 if (!ret) {
875 g_critical("unable to create state file at path %s", path);
876 ret = false;
877 goto out;
878 }
879 }
880 ret = true;
881 goto out;
882 }
883
884 keyfile = g_key_file_new();
885 g_key_file_load_from_file(keyfile, path, 0, &gerr);
886 if (gerr) {
887 g_critical("error loading persistent state from path: %s, %s",
888 path, gerr->message);
889 ret = false;
890 goto out;
891 }
892
893 persistent_state_from_keyfile(pstate, keyfile);
894
895 out:
896 if (keyfile) {
897 g_key_file_free(keyfile);
898 }
899 if (gerr) {
900 g_error_free(gerr);
901 }
902
903 return ret;
904 }
905
906 int64_t ga_get_fd_handle(GAState *s, Error **errp)
907 {
908 int64_t handle;
909
910 g_assert(s->pstate_filepath);
911 /* we blacklist commands and avoid operations that potentially require
912 * writing to disk when we're in a frozen state. this includes opening
913 * new files, so we should never get here in that situation
914 */
915 g_assert(!ga_is_frozen(s));
916
917 handle = s->pstate.fd_counter++;
918
919 /* This should never happen on a reasonable timeframe, as guest-file-open
920 * would have to be issued 2^63 times */
921 if (s->pstate.fd_counter == INT64_MAX) {
922 abort();
923 }
924
925 if (!write_persistent_state(&s->pstate, s->pstate_filepath)) {
926 error_setg(errp, "failed to commit persistent state to disk");
927 return -1;
928 }
929
930 return handle;
931 }
932
933 static void ga_print_cmd(QmpCommand *cmd, void *opaque)
934 {
935 printf("%s\n", qmp_command_name(cmd));
936 }
937
938 static GList *split_list(const gchar *str, const gchar *delim)
939 {
940 GList *list = NULL;
941 int i;
942 gchar **strv;
943
944 strv = g_strsplit(str, delim, -1);
945 for (i = 0; strv[i]; i++) {
946 list = g_list_prepend(list, strv[i]);
947 }
948 g_free(strv);
949
950 return list;
951 }
952
953 typedef struct GAConfig {
954 char *channel_path;
955 char *method;
956 char *log_filepath;
957 char *pid_filepath;
958 #ifdef CONFIG_FSFREEZE
959 char *fsfreeze_hook;
960 #endif
961 char *state_dir;
962 #ifdef _WIN32
963 const char *service;
964 #endif
965 gchar *bliststr; /* blacklist may point to this string */
966 GList *blacklist;
967 int daemonize;
968 GLogLevelFlags log_level;
969 int dumpconf;
970 } GAConfig;
971
972 static void config_load(GAConfig *config)
973 {
974 GError *gerr = NULL;
975 GKeyFile *keyfile;
976 const char *conf = g_getenv("QGA_CONF") ?: QGA_CONF_DEFAULT;
977
978 /* read system config */
979 keyfile = g_key_file_new();
980 if (!g_key_file_load_from_file(keyfile, conf, 0, &gerr)) {
981 goto end;
982 }
983 if (g_key_file_has_key(keyfile, "general", "daemon", NULL)) {
984 config->daemonize =
985 g_key_file_get_boolean(keyfile, "general", "daemon", &gerr);
986 }
987 if (g_key_file_has_key(keyfile, "general", "method", NULL)) {
988 config->method =
989 g_key_file_get_string(keyfile, "general", "method", &gerr);
990 }
991 if (g_key_file_has_key(keyfile, "general", "path", NULL)) {
992 config->channel_path =
993 g_key_file_get_string(keyfile, "general", "path", &gerr);
994 }
995 if (g_key_file_has_key(keyfile, "general", "logfile", NULL)) {
996 config->log_filepath =
997 g_key_file_get_string(keyfile, "general", "logfile", &gerr);
998 }
999 if (g_key_file_has_key(keyfile, "general", "pidfile", NULL)) {
1000 config->pid_filepath =
1001 g_key_file_get_string(keyfile, "general", "pidfile", &gerr);
1002 }
1003 #ifdef CONFIG_FSFREEZE
1004 if (g_key_file_has_key(keyfile, "general", "fsfreeze-hook", NULL)) {
1005 config->fsfreeze_hook =
1006 g_key_file_get_string(keyfile,
1007 "general", "fsfreeze-hook", &gerr);
1008 }
1009 #endif
1010 if (g_key_file_has_key(keyfile, "general", "statedir", NULL)) {
1011 config->state_dir =
1012 g_key_file_get_string(keyfile, "general", "statedir", &gerr);
1013 }
1014 if (g_key_file_has_key(keyfile, "general", "verbose", NULL) &&
1015 g_key_file_get_boolean(keyfile, "general", "verbose", &gerr)) {
1016 /* enable all log levels */
1017 config->log_level = G_LOG_LEVEL_MASK;
1018 }
1019 if (g_key_file_has_key(keyfile, "general", "blacklist", NULL)) {
1020 config->bliststr =
1021 g_key_file_get_string(keyfile, "general", "blacklist", &gerr);
1022 config->blacklist = g_list_concat(config->blacklist,
1023 split_list(config->bliststr, ","));
1024 }
1025
1026 end:
1027 g_key_file_free(keyfile);
1028 if (gerr &&
1029 !(gerr->domain == G_FILE_ERROR && gerr->code == G_FILE_ERROR_NOENT)) {
1030 g_critical("error loading configuration from path: %s, %s",
1031 QGA_CONF_DEFAULT, gerr->message);
1032 exit(EXIT_FAILURE);
1033 }
1034 g_clear_error(&gerr);
1035 }
1036
1037 static gchar *list_join(GList *list, const gchar separator)
1038 {
1039 GString *str = g_string_new("");
1040
1041 while (list) {
1042 str = g_string_append(str, (gchar *)list->data);
1043 list = g_list_next(list);
1044 if (list) {
1045 str = g_string_append_c(str, separator);
1046 }
1047 }
1048
1049 return g_string_free(str, FALSE);
1050 }
1051
1052 static void config_dump(GAConfig *config)
1053 {
1054 GError *error = NULL;
1055 GKeyFile *keyfile;
1056 gchar *tmp;
1057
1058 keyfile = g_key_file_new();
1059 g_assert(keyfile);
1060
1061 g_key_file_set_boolean(keyfile, "general", "daemon", config->daemonize);
1062 g_key_file_set_string(keyfile, "general", "method", config->method);
1063 if (config->channel_path) {
1064 g_key_file_set_string(keyfile, "general", "path", config->channel_path);
1065 }
1066 if (config->log_filepath) {
1067 g_key_file_set_string(keyfile, "general", "logfile",
1068 config->log_filepath);
1069 }
1070 g_key_file_set_string(keyfile, "general", "pidfile", config->pid_filepath);
1071 #ifdef CONFIG_FSFREEZE
1072 if (config->fsfreeze_hook) {
1073 g_key_file_set_string(keyfile, "general", "fsfreeze-hook",
1074 config->fsfreeze_hook);
1075 }
1076 #endif
1077 g_key_file_set_string(keyfile, "general", "statedir", config->state_dir);
1078 g_key_file_set_boolean(keyfile, "general", "verbose",
1079 config->log_level == G_LOG_LEVEL_MASK);
1080 tmp = list_join(config->blacklist, ',');
1081 g_key_file_set_string(keyfile, "general", "blacklist", tmp);
1082 g_free(tmp);
1083
1084 tmp = g_key_file_to_data(keyfile, NULL, &error);
1085 printf("%s", tmp);
1086
1087 g_free(tmp);
1088 g_key_file_free(keyfile);
1089 }
1090
1091 static void config_parse(GAConfig *config, int argc, char **argv)
1092 {
1093 const char *sopt = "hVvdm:p:l:f:F::b:s:t:D";
1094 int opt_ind = 0, ch;
1095 const struct option lopt[] = {
1096 { "help", 0, NULL, 'h' },
1097 { "version", 0, NULL, 'V' },
1098 { "dump-conf", 0, NULL, 'D' },
1099 { "logfile", 1, NULL, 'l' },
1100 { "pidfile", 1, NULL, 'f' },
1101 #ifdef CONFIG_FSFREEZE
1102 { "fsfreeze-hook", 2, NULL, 'F' },
1103 #endif
1104 { "verbose", 0, NULL, 'v' },
1105 { "method", 1, NULL, 'm' },
1106 { "path", 1, NULL, 'p' },
1107 { "daemonize", 0, NULL, 'd' },
1108 { "blacklist", 1, NULL, 'b' },
1109 #ifdef _WIN32
1110 { "service", 1, NULL, 's' },
1111 #endif
1112 { "statedir", 1, NULL, 't' },
1113 { NULL, 0, NULL, 0 }
1114 };
1115
1116 while ((ch = getopt_long(argc, argv, sopt, lopt, &opt_ind)) != -1) {
1117 switch (ch) {
1118 case 'm':
1119 g_free(config->method);
1120 config->method = g_strdup(optarg);
1121 break;
1122 case 'p':
1123 g_free(config->channel_path);
1124 config->channel_path = g_strdup(optarg);
1125 break;
1126 case 'l':
1127 g_free(config->log_filepath);
1128 config->log_filepath = g_strdup(optarg);
1129 break;
1130 case 'f':
1131 g_free(config->pid_filepath);
1132 config->pid_filepath = g_strdup(optarg);
1133 break;
1134 #ifdef CONFIG_FSFREEZE
1135 case 'F':
1136 g_free(config->fsfreeze_hook);
1137 config->fsfreeze_hook = g_strdup(optarg ?: QGA_FSFREEZE_HOOK_DEFAULT);
1138 break;
1139 #endif
1140 case 't':
1141 g_free(config->state_dir);
1142 config->state_dir = g_strdup(optarg);
1143 break;
1144 case 'v':
1145 /* enable all log levels */
1146 config->log_level = G_LOG_LEVEL_MASK;
1147 break;
1148 case 'V':
1149 printf("QEMU Guest Agent %s\n", QEMU_VERSION);
1150 exit(EXIT_SUCCESS);
1151 case 'd':
1152 config->daemonize = 1;
1153 break;
1154 case 'D':
1155 config->dumpconf = 1;
1156 break;
1157 case 'b': {
1158 if (is_help_option(optarg)) {
1159 qmp_for_each_command(&ga_commands, ga_print_cmd, NULL);
1160 exit(EXIT_SUCCESS);
1161 }
1162 config->blacklist = g_list_concat(config->blacklist,
1163 split_list(optarg, ","));
1164 break;
1165 }
1166 #ifdef _WIN32
1167 case 's':
1168 config->service = optarg;
1169 if (strcmp(config->service, "install") == 0) {
1170 if (ga_install_vss_provider()) {
1171 exit(EXIT_FAILURE);
1172 }
1173 if (ga_install_service(config->channel_path,
1174 config->log_filepath, config->state_dir)) {
1175 exit(EXIT_FAILURE);
1176 }
1177 exit(EXIT_SUCCESS);
1178 } else if (strcmp(config->service, "uninstall") == 0) {
1179 ga_uninstall_vss_provider();
1180 exit(ga_uninstall_service());
1181 } else if (strcmp(config->service, "vss-install") == 0) {
1182 if (ga_install_vss_provider()) {
1183 exit(EXIT_FAILURE);
1184 }
1185 exit(EXIT_SUCCESS);
1186 } else if (strcmp(config->service, "vss-uninstall") == 0) {
1187 ga_uninstall_vss_provider();
1188 exit(EXIT_SUCCESS);
1189 } else {
1190 printf("Unknown service command.\n");
1191 exit(EXIT_FAILURE);
1192 }
1193 break;
1194 #endif
1195 case 'h':
1196 usage(argv[0]);
1197 exit(EXIT_SUCCESS);
1198 case '?':
1199 g_print("Unknown option, try '%s --help' for more information.\n",
1200 argv[0]);
1201 exit(EXIT_FAILURE);
1202 }
1203 }
1204 }
1205
1206 static void config_free(GAConfig *config)
1207 {
1208 g_free(config->method);
1209 g_free(config->log_filepath);
1210 g_free(config->pid_filepath);
1211 g_free(config->state_dir);
1212 g_free(config->channel_path);
1213 g_free(config->bliststr);
1214 #ifdef CONFIG_FSFREEZE
1215 g_free(config->fsfreeze_hook);
1216 #endif
1217 g_list_free_full(config->blacklist, g_free);
1218 g_free(config);
1219 }
1220
1221 static bool check_is_frozen(GAState *s)
1222 {
1223 #ifndef _WIN32
1224 /* check if a previous instance of qemu-ga exited with filesystems' state
1225 * marked as frozen. this could be a stale value (a non-qemu-ga process
1226 * or reboot may have since unfrozen them), but better to require an
1227 * uneeded unfreeze than to risk hanging on start-up
1228 */
1229 struct stat st;
1230 if (stat(s->state_filepath_isfrozen, &st) == -1) {
1231 /* it's okay if the file doesn't exist, but if we can't access for
1232 * some other reason, such as permissions, there's a configuration
1233 * that needs to be addressed. so just bail now before we get into
1234 * more trouble later
1235 */
1236 if (errno != ENOENT) {
1237 g_critical("unable to access state file at path %s: %s",
1238 s->state_filepath_isfrozen, strerror(errno));
1239 return EXIT_FAILURE;
1240 }
1241 } else {
1242 g_warning("previous instance appears to have exited with frozen"
1243 " filesystems. deferring logging/pidfile creation and"
1244 " disabling non-fsfreeze-safe commands until"
1245 " guest-fsfreeze-thaw is issued, or filesystems are"
1246 " manually unfrozen and the file %s is removed",
1247 s->state_filepath_isfrozen);
1248 return true;
1249 }
1250 #endif
1251 return false;
1252 }
1253
1254 static int run_agent(GAState *s, GAConfig *config)
1255 {
1256 ga_state = s;
1257
1258 g_log_set_default_handler(ga_log, s);
1259 g_log_set_fatal_mask(NULL, G_LOG_LEVEL_ERROR);
1260 ga_enable_logging(s);
1261
1262 #ifdef _WIN32
1263 /* On win32 the state directory is application specific (be it the default
1264 * or a user override). We got past the command line parsing; let's create
1265 * the directory (with any intermediate directories). If we run into an
1266 * error later on, we won't try to clean up the directory, it is considered
1267 * persistent.
1268 */
1269 if (g_mkdir_with_parents(config->state_dir, S_IRWXU) == -1) {
1270 g_critical("unable to create (an ancestor of) the state directory"
1271 " '%s': %s", config->state_dir, strerror(errno));
1272 return EXIT_FAILURE;
1273 }
1274 #endif
1275
1276 if (ga_is_frozen(s)) {
1277 if (config->daemonize) {
1278 /* delay opening/locking of pidfile till filesystems are unfrozen */
1279 s->deferred_options.pid_filepath = config->pid_filepath;
1280 become_daemon(NULL);
1281 }
1282 if (config->log_filepath) {
1283 /* delay opening the log file till filesystems are unfrozen */
1284 s->deferred_options.log_filepath = config->log_filepath;
1285 }
1286 ga_disable_logging(s);
1287 qmp_for_each_command(&ga_commands, ga_disable_non_whitelisted, NULL);
1288 } else {
1289 if (config->daemonize) {
1290 become_daemon(config->pid_filepath);
1291 }
1292 if (config->log_filepath) {
1293 FILE *log_file = ga_open_logfile(config->log_filepath);
1294 if (!log_file) {
1295 g_critical("unable to open specified log file: %s",
1296 strerror(errno));
1297 return EXIT_FAILURE;
1298 }
1299 s->log_file = log_file;
1300 }
1301 }
1302
1303 /* load persistent state from disk */
1304 if (!read_persistent_state(&s->pstate,
1305 s->pstate_filepath,
1306 ga_is_frozen(s))) {
1307 g_critical("failed to load persistent state");
1308 return EXIT_FAILURE;
1309 }
1310
1311 config->blacklist = ga_command_blacklist_init(config->blacklist);
1312 if (config->blacklist) {
1313 GList *l = config->blacklist;
1314 s->blacklist = config->blacklist;
1315 do {
1316 g_debug("disabling command: %s", (char *)l->data);
1317 qmp_disable_command(&ga_commands, l->data);
1318 l = g_list_next(l);
1319 } while (l);
1320 }
1321 s->command_state = ga_command_state_new();
1322 ga_command_state_init(s, s->command_state);
1323 ga_command_state_init_all(s->command_state);
1324 json_message_parser_init(&s->parser, process_event);
1325 ga_state = s;
1326 #ifndef _WIN32
1327 if (!register_signal_handlers()) {
1328 g_critical("failed to register signal handlers");
1329 return EXIT_FAILURE;
1330 }
1331 #endif
1332
1333 s->main_loop = g_main_loop_new(NULL, false);
1334
1335 if (!channel_init(ga_state, config->method, config->channel_path,
1336 get_listen_fd(true))) {
1337 g_critical("failed to initialize guest agent channel");
1338 return EXIT_FAILURE;
1339 }
1340 #ifndef _WIN32
1341 g_main_loop_run(ga_state->main_loop);
1342 #else
1343 if (config->daemonize) {
1344 SERVICE_TABLE_ENTRY service_table[] = {
1345 { (char *)QGA_SERVICE_NAME, service_main }, { NULL, NULL } };
1346 StartServiceCtrlDispatcher(service_table);
1347 } else {
1348 g_main_loop_run(ga_state->main_loop);
1349 }
1350 #endif
1351
1352 return EXIT_SUCCESS;
1353 }
1354
1355 int main(int argc, char **argv)
1356 {
1357 int ret = EXIT_SUCCESS;
1358 GAState *s = g_new0(GAState, 1);
1359 GAConfig *config = g_new0(GAConfig, 1);
1360 int listen_fd;
1361
1362 config->log_level = G_LOG_LEVEL_ERROR | G_LOG_LEVEL_CRITICAL;
1363
1364 qga_qmp_init_marshal(&ga_commands);
1365
1366 init_dfl_pathnames();
1367 config_load(config);
1368 config_parse(config, argc, argv);
1369
1370 if (config->pid_filepath == NULL) {
1371 config->pid_filepath = g_strdup(dfl_pathnames.pidfile);
1372 }
1373
1374 if (config->state_dir == NULL) {
1375 config->state_dir = g_strdup(dfl_pathnames.state_dir);
1376 }
1377
1378 if (config->method == NULL) {
1379 config->method = g_strdup("virtio-serial");
1380 }
1381
1382 listen_fd = get_listen_fd(false);
1383 if (listen_fd >= 0) {
1384 SocketAddress *addr;
1385
1386 g_free(config->method);
1387 g_free(config->channel_path);
1388 config->method = NULL;
1389 config->channel_path = NULL;
1390
1391 addr = socket_local_address(listen_fd, NULL);
1392 if (addr) {
1393 if (addr->type == SOCKET_ADDRESS_KIND_UNIX) {
1394 config->method = g_strdup("unix-listen");
1395 } else if (addr->type == SOCKET_ADDRESS_KIND_VSOCK) {
1396 config->method = g_strdup("vsock-listen");
1397 }
1398
1399 qapi_free_SocketAddress(addr);
1400 }
1401
1402 if (!config->method) {
1403 g_critical("unsupported listen fd type");
1404 ret = EXIT_FAILURE;
1405 goto end;
1406 }
1407 } else if (config->channel_path == NULL) {
1408 if (strcmp(config->method, "virtio-serial") == 0) {
1409 /* try the default path for the virtio-serial port */
1410 config->channel_path = g_strdup(QGA_VIRTIO_PATH_DEFAULT);
1411 } else if (strcmp(config->method, "isa-serial") == 0) {
1412 /* try the default path for the serial port - COM1 */
1413 config->channel_path = g_strdup(QGA_SERIAL_PATH_DEFAULT);
1414 } else {
1415 g_critical("must specify a path for this channel");
1416 ret = EXIT_FAILURE;
1417 goto end;
1418 }
1419 }
1420
1421 s->log_level = config->log_level;
1422 s->log_file = stderr;
1423 #ifdef CONFIG_FSFREEZE
1424 s->fsfreeze_hook = config->fsfreeze_hook;
1425 #endif
1426 s->pstate_filepath = g_strdup_printf("%s/qga.state", config->state_dir);
1427 s->state_filepath_isfrozen = g_strdup_printf("%s/qga.state.isfrozen",
1428 config->state_dir);
1429 s->frozen = check_is_frozen(s);
1430
1431 if (config->dumpconf) {
1432 config_dump(config);
1433 goto end;
1434 }
1435
1436 ret = run_agent(s, config);
1437
1438 end:
1439 if (s->command_state) {
1440 ga_command_state_cleanup_all(s->command_state);
1441 ga_command_state_free(s->command_state);
1442 json_message_parser_destroy(&s->parser);
1443 }
1444 if (s->channel) {
1445 ga_channel_free(s->channel);
1446 }
1447 g_free(s->pstate_filepath);
1448 g_free(s->state_filepath_isfrozen);
1449
1450 if (config->daemonize) {
1451 unlink(config->pid_filepath);
1452 }
1453
1454 config_free(config);
1455 if (s->main_loop) {
1456 g_main_loop_unref(s->main_loop);
1457 }
1458 g_free(s);
1459
1460 return ret;
1461 }