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[thirdparty/systemd.git] / src / core / manager.c
1 /* SPDX-License-Identifier: LGPL-2.1-or-later */
2
3 #include <errno.h>
4 #include <fcntl.h>
5 #include <linux/kd.h>
6 #include <sys/epoll.h>
7 #include <sys/inotify.h>
8 #include <sys/ioctl.h>
9 #include <sys/reboot.h>
10 #include <sys/timerfd.h>
11 #include <sys/wait.h>
12 #include <unistd.h>
13
14 #if HAVE_AUDIT
15 #include <libaudit.h>
16 #endif
17
18 #include "sd-daemon.h"
19 #include "sd-messages.h"
20 #include "sd-path.h"
21
22 #include "all-units.h"
23 #include "alloc-util.h"
24 #include "audit-fd.h"
25 #include "boot-timestamps.h"
26 #include "bus-common-errors.h"
27 #include "bus-error.h"
28 #include "bus-kernel.h"
29 #include "bus-util.h"
30 #include "clean-ipc.h"
31 #include "clock-util.h"
32 #include "core-varlink.h"
33 #include "creds-util.h"
34 #include "dbus-job.h"
35 #include "dbus-manager.h"
36 #include "dbus-unit.h"
37 #include "dbus.h"
38 #include "def.h"
39 #include "dirent-util.h"
40 #include "env-util.h"
41 #include "escape.h"
42 #include "exec-util.h"
43 #include "execute.h"
44 #include "exit-status.h"
45 #include "fd-util.h"
46 #include "fileio.h"
47 #include "generator-setup.h"
48 #include "hashmap.h"
49 #include "inotify-util.h"
50 #include "install.h"
51 #include "io-util.h"
52 #include "label.h"
53 #include "load-fragment.h"
54 #include "locale-setup.h"
55 #include "log.h"
56 #include "macro.h"
57 #include "manager.h"
58 #include "manager-dump.h"
59 #include "manager-serialize.h"
60 #include "memory-util.h"
61 #include "mkdir-label.h"
62 #include "parse-util.h"
63 #include "path-lookup.h"
64 #include "path-util.h"
65 #include "process-util.h"
66 #include "ratelimit.h"
67 #include "rlimit-util.h"
68 #include "rm-rf.h"
69 #include "selinux-util.h"
70 #include "signal-util.h"
71 #include "socket-util.h"
72 #include "special.h"
73 #include "stat-util.h"
74 #include "string-table.h"
75 #include "string-util.h"
76 #include "strv.h"
77 #include "strxcpyx.h"
78 #include "sysctl-util.h"
79 #include "syslog-util.h"
80 #include "terminal-util.h"
81 #include "time-util.h"
82 #include "transaction.h"
83 #include "umask-util.h"
84 #include "unit-name.h"
85 #include "user-util.h"
86 #include "virt.h"
87 #include "watchdog.h"
88
89 #define NOTIFY_RCVBUF_SIZE (8*1024*1024)
90 #define CGROUPS_AGENT_RCVBUF_SIZE (8*1024*1024)
91
92 /* Initial delay and the interval for printing status messages about running jobs */
93 #define JOBS_IN_PROGRESS_WAIT_USEC (2*USEC_PER_SEC)
94 #define JOBS_IN_PROGRESS_QUIET_WAIT_USEC (25*USEC_PER_SEC)
95 #define JOBS_IN_PROGRESS_PERIOD_USEC (USEC_PER_SEC / 3)
96 #define JOBS_IN_PROGRESS_PERIOD_DIVISOR 3
97
98 /* If there are more than 1K bus messages queue across our API and direct buses, then let's not add more on top until
99 * the queue gets more empty. */
100 #define MANAGER_BUS_BUSY_THRESHOLD 1024LU
101
102 /* How many units and jobs to process of the bus queue before returning to the event loop. */
103 #define MANAGER_BUS_MESSAGE_BUDGET 100U
104
105 static int manager_dispatch_notify_fd(sd_event_source *source, int fd, uint32_t revents, void *userdata);
106 static int manager_dispatch_cgroups_agent_fd(sd_event_source *source, int fd, uint32_t revents, void *userdata);
107 static int manager_dispatch_signal_fd(sd_event_source *source, int fd, uint32_t revents, void *userdata);
108 static int manager_dispatch_time_change_fd(sd_event_source *source, int fd, uint32_t revents, void *userdata);
109 static int manager_dispatch_idle_pipe_fd(sd_event_source *source, int fd, uint32_t revents, void *userdata);
110 static int manager_dispatch_user_lookup_fd(sd_event_source *source, int fd, uint32_t revents, void *userdata);
111 static int manager_dispatch_jobs_in_progress(sd_event_source *source, usec_t usec, void *userdata);
112 static int manager_dispatch_run_queue(sd_event_source *source, void *userdata);
113 static int manager_dispatch_sigchld(sd_event_source *source, void *userdata);
114 static int manager_dispatch_timezone_change(sd_event_source *source, const struct inotify_event *event, void *userdata);
115 static int manager_run_environment_generators(Manager *m);
116 static int manager_run_generators(Manager *m);
117 static void manager_vacuum(Manager *m);
118
119 static usec_t manager_watch_jobs_next_time(Manager *m) {
120 usec_t timeout;
121
122 if (MANAGER_IS_USER(m))
123 /* Let the user manager without a timeout show status quickly, so the system manager can make
124 * use of it, if it wants to. */
125 timeout = JOBS_IN_PROGRESS_WAIT_USEC * 2 / 3;
126 else if (show_status_on(m->show_status))
127 /* When status is on, just use the usual timeout. */
128 timeout = JOBS_IN_PROGRESS_WAIT_USEC;
129 else
130 timeout = JOBS_IN_PROGRESS_QUIET_WAIT_USEC;
131
132 return usec_add(now(CLOCK_MONOTONIC), timeout);
133 }
134
135 static void manager_watch_jobs_in_progress(Manager *m) {
136 usec_t next;
137 int r;
138
139 assert(m);
140
141 /* We do not want to show the cylon animation if the user
142 * needs to confirm service executions otherwise confirmation
143 * messages will be screwed by the cylon animation. */
144 if (!manager_is_confirm_spawn_disabled(m))
145 return;
146
147 if (m->jobs_in_progress_event_source)
148 return;
149
150 next = manager_watch_jobs_next_time(m);
151 r = sd_event_add_time(
152 m->event,
153 &m->jobs_in_progress_event_source,
154 CLOCK_MONOTONIC,
155 next, 0,
156 manager_dispatch_jobs_in_progress, m);
157 if (r < 0)
158 return;
159
160 (void) sd_event_source_set_description(m->jobs_in_progress_event_source, "manager-jobs-in-progress");
161 }
162
163 #define CYLON_BUFFER_EXTRA (2*STRLEN(ANSI_RED) + STRLEN(ANSI_HIGHLIGHT_RED) + 2*STRLEN(ANSI_NORMAL))
164
165 static void draw_cylon(char buffer[], size_t buflen, unsigned width, unsigned pos) {
166 char *p = buffer;
167
168 assert(buflen >= CYLON_BUFFER_EXTRA + width + 1);
169 assert(pos <= width+1); /* 0 or width+1 mean that the center light is behind the corner */
170
171 if (pos > 1) {
172 if (pos > 2)
173 p = mempset(p, ' ', pos-2);
174 if (log_get_show_color())
175 p = stpcpy(p, ANSI_RED);
176 *p++ = '*';
177 }
178
179 if (pos > 0 && pos <= width) {
180 if (log_get_show_color())
181 p = stpcpy(p, ANSI_HIGHLIGHT_RED);
182 *p++ = '*';
183 }
184
185 if (log_get_show_color())
186 p = stpcpy(p, ANSI_NORMAL);
187
188 if (pos < width) {
189 if (log_get_show_color())
190 p = stpcpy(p, ANSI_RED);
191 *p++ = '*';
192 if (pos < width-1)
193 p = mempset(p, ' ', width-1-pos);
194 if (log_get_show_color())
195 strcpy(p, ANSI_NORMAL);
196 }
197 }
198
199 static void manager_flip_auto_status(Manager *m, bool enable, const char *reason) {
200 assert(m);
201
202 if (enable) {
203 if (m->show_status == SHOW_STATUS_AUTO)
204 manager_set_show_status(m, SHOW_STATUS_TEMPORARY, reason);
205 } else {
206 if (m->show_status == SHOW_STATUS_TEMPORARY)
207 manager_set_show_status(m, SHOW_STATUS_AUTO, reason);
208 }
209 }
210
211 static void manager_print_jobs_in_progress(Manager *m) {
212 Job *j;
213 unsigned counter = 0, print_nr;
214 char cylon[6 + CYLON_BUFFER_EXTRA + 1];
215 unsigned cylon_pos;
216 uint64_t x;
217
218 assert(m);
219 assert(m->n_running_jobs > 0);
220
221 manager_flip_auto_status(m, true, "delay");
222
223 print_nr = (m->jobs_in_progress_iteration / JOBS_IN_PROGRESS_PERIOD_DIVISOR) % m->n_running_jobs;
224
225 HASHMAP_FOREACH(j, m->jobs)
226 if (j->state == JOB_RUNNING && counter++ == print_nr)
227 break;
228
229 /* m->n_running_jobs must be consistent with the contents of m->jobs,
230 * so the above loop must have succeeded in finding j. */
231 assert(counter == print_nr + 1);
232 assert(j);
233
234 cylon_pos = m->jobs_in_progress_iteration % 14;
235 if (cylon_pos >= 8)
236 cylon_pos = 14 - cylon_pos;
237 draw_cylon(cylon, sizeof(cylon), 6, cylon_pos);
238
239 m->jobs_in_progress_iteration++;
240
241 char job_of_n[STRLEN("( of ) ") + DECIMAL_STR_MAX(unsigned)*2] = "";
242 if (m->n_running_jobs > 1)
243 xsprintf(job_of_n, "(%u of %u) ", counter, m->n_running_jobs);
244
245 bool have_timeout = job_get_timeout(j, &x) > 0;
246
247 /* We want to use enough information for the user to identify previous lines talking about the same
248 * unit, but keep the message as short as possible. So if 'Starting foo.service' or 'Starting
249 * foo.service - Description' were used, 'foo.service' is enough here. On the other hand, if we used
250 * 'Starting Description' before, then we shall also use 'Description' here. So we pass NULL as the
251 * second argument to unit_status_string(). */
252 const char *ident = unit_status_string(j->unit, NULL);
253
254 const char *time = FORMAT_TIMESPAN(now(CLOCK_MONOTONIC) - j->begin_usec, 1*USEC_PER_SEC);
255 const char *limit = have_timeout ? FORMAT_TIMESPAN(x - j->begin_usec, 1*USEC_PER_SEC) : "no limit";
256
257 if (m->status_unit_format == STATUS_UNIT_FORMAT_DESCRIPTION)
258 /* When using 'Description', we effectively don't have enough space to show the nested status
259 * without ellipsization, so let's not even try. */
260 manager_status_printf(m, STATUS_TYPE_EPHEMERAL, cylon,
261 "%sA %s job is running for %s (%s / %s)",
262 job_of_n,
263 job_type_to_string(j->type),
264 ident,
265 time, limit);
266 else {
267 const char *status_text = unit_status_text(j->unit);
268
269 manager_status_printf(m, STATUS_TYPE_EPHEMERAL, cylon,
270 "%sJob %s/%s running (%s / %s)%s%s",
271 job_of_n,
272 ident,
273 job_type_to_string(j->type),
274 time, limit,
275 status_text ? ": " : "",
276 strempty(status_text));
277 }
278
279 sd_notifyf(false,
280 "STATUS=%sUser job %s/%s running (%s / %s)...",
281 job_of_n,
282 ident,
283 job_type_to_string(j->type),
284 time, limit);
285 m->status_ready = false;
286 }
287
288 static int have_ask_password(void) {
289 _cleanup_closedir_ DIR *dir = NULL;
290
291 dir = opendir("/run/systemd/ask-password");
292 if (!dir) {
293 if (errno == ENOENT)
294 return false;
295 else
296 return -errno;
297 }
298
299 FOREACH_DIRENT_ALL(de, dir, return -errno)
300 if (startswith(de->d_name, "ask."))
301 return true;
302 return false;
303 }
304
305 static int manager_dispatch_ask_password_fd(sd_event_source *source,
306 int fd, uint32_t revents, void *userdata) {
307 Manager *m = userdata;
308
309 assert(m);
310
311 (void) flush_fd(fd);
312
313 m->have_ask_password = have_ask_password();
314 if (m->have_ask_password < 0)
315 /* Log error but continue. Negative have_ask_password
316 * is treated as unknown status. */
317 log_error_errno(m->have_ask_password, "Failed to list /run/systemd/ask-password: %m");
318
319 return 0;
320 }
321
322 static void manager_close_ask_password(Manager *m) {
323 assert(m);
324
325 m->ask_password_event_source = sd_event_source_disable_unref(m->ask_password_event_source);
326 m->ask_password_inotify_fd = safe_close(m->ask_password_inotify_fd);
327 m->have_ask_password = -EINVAL;
328 }
329
330 static int manager_check_ask_password(Manager *m) {
331 int r;
332
333 assert(m);
334
335 if (!m->ask_password_event_source) {
336 assert(m->ask_password_inotify_fd < 0);
337
338 (void) mkdir_p_label("/run/systemd/ask-password", 0755);
339
340 m->ask_password_inotify_fd = inotify_init1(IN_NONBLOCK|IN_CLOEXEC);
341 if (m->ask_password_inotify_fd < 0)
342 return log_error_errno(errno, "Failed to create inotify object: %m");
343
344 r = inotify_add_watch_and_warn(m->ask_password_inotify_fd,
345 "/run/systemd/ask-password",
346 IN_CREATE|IN_DELETE|IN_MOVE);
347 if (r < 0) {
348 manager_close_ask_password(m);
349 return r;
350 }
351
352 r = sd_event_add_io(m->event, &m->ask_password_event_source,
353 m->ask_password_inotify_fd, EPOLLIN,
354 manager_dispatch_ask_password_fd, m);
355 if (r < 0) {
356 log_error_errno(r, "Failed to add event source for /run/systemd/ask-password: %m");
357 manager_close_ask_password(m);
358 return r;
359 }
360
361 (void) sd_event_source_set_description(m->ask_password_event_source, "manager-ask-password");
362
363 /* Queries might have been added meanwhile... */
364 manager_dispatch_ask_password_fd(m->ask_password_event_source,
365 m->ask_password_inotify_fd, EPOLLIN, m);
366 }
367
368 return m->have_ask_password;
369 }
370
371 static int manager_watch_idle_pipe(Manager *m) {
372 int r;
373
374 assert(m);
375
376 if (m->idle_pipe_event_source)
377 return 0;
378
379 if (m->idle_pipe[2] < 0)
380 return 0;
381
382 r = sd_event_add_io(m->event, &m->idle_pipe_event_source, m->idle_pipe[2], EPOLLIN, manager_dispatch_idle_pipe_fd, m);
383 if (r < 0)
384 return log_error_errno(r, "Failed to watch idle pipe: %m");
385
386 (void) sd_event_source_set_description(m->idle_pipe_event_source, "manager-idle-pipe");
387
388 return 0;
389 }
390
391 static void manager_close_idle_pipe(Manager *m) {
392 assert(m);
393
394 m->idle_pipe_event_source = sd_event_source_disable_unref(m->idle_pipe_event_source);
395
396 safe_close_pair(m->idle_pipe);
397 safe_close_pair(m->idle_pipe + 2);
398 }
399
400 static int manager_setup_time_change(Manager *m) {
401 int r;
402
403 assert(m);
404
405 if (MANAGER_IS_TEST_RUN(m))
406 return 0;
407
408 m->time_change_event_source = sd_event_source_disable_unref(m->time_change_event_source);
409 m->time_change_fd = safe_close(m->time_change_fd);
410
411 m->time_change_fd = time_change_fd();
412 if (m->time_change_fd < 0)
413 return log_error_errno(m->time_change_fd, "Failed to create timer change timer fd: %m");
414
415 r = sd_event_add_io(m->event, &m->time_change_event_source, m->time_change_fd, EPOLLIN, manager_dispatch_time_change_fd, m);
416 if (r < 0)
417 return log_error_errno(r, "Failed to create time change event source: %m");
418
419 /* Schedule this slightly earlier than the .timer event sources */
420 r = sd_event_source_set_priority(m->time_change_event_source, SD_EVENT_PRIORITY_NORMAL-1);
421 if (r < 0)
422 return log_error_errno(r, "Failed to set priority of time change event sources: %m");
423
424 (void) sd_event_source_set_description(m->time_change_event_source, "manager-time-change");
425
426 log_debug("Set up TFD_TIMER_CANCEL_ON_SET timerfd.");
427
428 return 0;
429 }
430
431 static int manager_read_timezone_stat(Manager *m) {
432 struct stat st;
433 bool changed;
434
435 assert(m);
436
437 /* Read the current stat() data of /etc/localtime so that we detect changes */
438 if (lstat("/etc/localtime", &st) < 0) {
439 log_debug_errno(errno, "Failed to stat /etc/localtime, ignoring: %m");
440 changed = m->etc_localtime_accessible;
441 m->etc_localtime_accessible = false;
442 } else {
443 usec_t k;
444
445 k = timespec_load(&st.st_mtim);
446 changed = !m->etc_localtime_accessible || k != m->etc_localtime_mtime;
447
448 m->etc_localtime_mtime = k;
449 m->etc_localtime_accessible = true;
450 }
451
452 return changed;
453 }
454
455 static int manager_setup_timezone_change(Manager *m) {
456 _cleanup_(sd_event_source_unrefp) sd_event_source *new_event = NULL;
457 int r;
458
459 assert(m);
460
461 if (MANAGER_IS_TEST_RUN(m))
462 return 0;
463
464 /* We watch /etc/localtime for three events: change of the link count (which might mean removal from /etc even
465 * though another link might be kept), renames, and file close operations after writing. Note we don't bother
466 * with IN_DELETE_SELF, as that would just report when the inode is removed entirely, i.e. after the link count
467 * went to zero and all fds to it are closed.
468 *
469 * Note that we never follow symlinks here. This is a simplification, but should cover almost all cases
470 * correctly.
471 *
472 * Note that we create the new event source first here, before releasing the old one. This should optimize
473 * behaviour as this way sd-event can reuse the old watch in case the inode didn't change. */
474
475 r = sd_event_add_inotify(m->event, &new_event, "/etc/localtime",
476 IN_ATTRIB|IN_MOVE_SELF|IN_CLOSE_WRITE|IN_DONT_FOLLOW, manager_dispatch_timezone_change, m);
477 if (r == -ENOENT) {
478 /* If the file doesn't exist yet, subscribe to /etc instead, and wait until it is created either by
479 * O_CREATE or by rename() */
480
481 log_debug_errno(r, "/etc/localtime doesn't exist yet, watching /etc instead.");
482 r = sd_event_add_inotify(m->event, &new_event, "/etc",
483 IN_CREATE|IN_MOVED_TO|IN_ONLYDIR, manager_dispatch_timezone_change, m);
484 }
485 if (r < 0)
486 return log_error_errno(r, "Failed to create timezone change event source: %m");
487
488 /* Schedule this slightly earlier than the .timer event sources */
489 r = sd_event_source_set_priority(new_event, SD_EVENT_PRIORITY_NORMAL-1);
490 if (r < 0)
491 return log_error_errno(r, "Failed to set priority of timezone change event sources: %m");
492
493 sd_event_source_unref(m->timezone_change_event_source);
494 m->timezone_change_event_source = TAKE_PTR(new_event);
495
496 return 0;
497 }
498
499 static int enable_special_signals(Manager *m) {
500 _cleanup_close_ int fd = -1;
501
502 assert(m);
503
504 if (MANAGER_IS_TEST_RUN(m))
505 return 0;
506
507 /* Enable that we get SIGINT on control-alt-del. In containers
508 * this will fail with EPERM (older) or EINVAL (newer), so
509 * ignore that. */
510 if (reboot(RB_DISABLE_CAD) < 0 && !IN_SET(errno, EPERM, EINVAL))
511 log_warning_errno(errno, "Failed to enable ctrl-alt-del handling: %m");
512
513 fd = open_terminal("/dev/tty0", O_RDWR|O_NOCTTY|O_CLOEXEC);
514 if (fd < 0) {
515 /* Support systems without virtual console */
516 if (fd != -ENOENT)
517 log_warning_errno(errno, "Failed to open /dev/tty0: %m");
518 } else {
519 /* Enable that we get SIGWINCH on kbrequest */
520 if (ioctl(fd, KDSIGACCEPT, SIGWINCH) < 0)
521 log_warning_errno(errno, "Failed to enable kbrequest handling: %m");
522 }
523
524 return 0;
525 }
526
527 #define RTSIG_IF_AVAILABLE(signum) (signum <= SIGRTMAX ? signum : -1)
528
529 static int manager_setup_signals(Manager *m) {
530 struct sigaction sa = {
531 .sa_handler = SIG_DFL,
532 .sa_flags = SA_NOCLDSTOP|SA_RESTART,
533 };
534 sigset_t mask;
535 int r;
536
537 assert(m);
538
539 assert_se(sigaction(SIGCHLD, &sa, NULL) == 0);
540
541 /* We make liberal use of realtime signals here. On
542 * Linux/glibc we have 30 of them (with the exception of Linux
543 * on hppa, see below), between SIGRTMIN+0 ... SIGRTMIN+30
544 * (aka SIGRTMAX). */
545
546 assert_se(sigemptyset(&mask) == 0);
547 sigset_add_many(&mask,
548 SIGCHLD, /* Child died */
549 SIGTERM, /* Reexecute daemon */
550 SIGHUP, /* Reload configuration */
551 SIGUSR1, /* systemd: reconnect to D-Bus */
552 SIGUSR2, /* systemd: dump status */
553 SIGINT, /* Kernel sends us this on control-alt-del */
554 SIGWINCH, /* Kernel sends us this on kbrequest (alt-arrowup) */
555 SIGPWR, /* Some kernel drivers and upsd send us this on power failure */
556
557 SIGRTMIN+0, /* systemd: start default.target */
558 SIGRTMIN+1, /* systemd: isolate rescue.target */
559 SIGRTMIN+2, /* systemd: isolate emergency.target */
560 SIGRTMIN+3, /* systemd: start halt.target */
561 SIGRTMIN+4, /* systemd: start poweroff.target */
562 SIGRTMIN+5, /* systemd: start reboot.target */
563 SIGRTMIN+6, /* systemd: start kexec.target */
564
565 /* ... space for more special targets ... */
566
567 SIGRTMIN+13, /* systemd: Immediate halt */
568 SIGRTMIN+14, /* systemd: Immediate poweroff */
569 SIGRTMIN+15, /* systemd: Immediate reboot */
570 SIGRTMIN+16, /* systemd: Immediate kexec */
571
572 /* ... space for more immediate system state changes ... */
573
574 SIGRTMIN+20, /* systemd: enable status messages */
575 SIGRTMIN+21, /* systemd: disable status messages */
576 SIGRTMIN+22, /* systemd: set log level to LOG_DEBUG */
577 SIGRTMIN+23, /* systemd: set log level to LOG_INFO */
578 SIGRTMIN+24, /* systemd: Immediate exit (--user only) */
579 SIGRTMIN+25, /* systemd: reexecute manager */
580
581 /* Apparently Linux on hppa had fewer RT signals until v3.18,
582 * SIGRTMAX was SIGRTMIN+25, and then SIGRTMIN was lowered,
583 * see commit v3.17-7614-g1f25df2eff.
584 *
585 * We cannot unconditionally make use of those signals here,
586 * so let's use a runtime check. Since these commands are
587 * accessible by different means and only really a safety
588 * net, the missing functionality on hppa shouldn't matter.
589 */
590
591 RTSIG_IF_AVAILABLE(SIGRTMIN+26), /* systemd: set log target to journal-or-kmsg */
592 RTSIG_IF_AVAILABLE(SIGRTMIN+27), /* systemd: set log target to console */
593 RTSIG_IF_AVAILABLE(SIGRTMIN+28), /* systemd: set log target to kmsg */
594 RTSIG_IF_AVAILABLE(SIGRTMIN+29), /* systemd: set log target to syslog-or-kmsg (obsolete) */
595
596 /* ... one free signal here SIGRTMIN+30 ... */
597 -1);
598 assert_se(sigprocmask(SIG_SETMASK, &mask, NULL) == 0);
599
600 m->signal_fd = signalfd(-1, &mask, SFD_NONBLOCK|SFD_CLOEXEC);
601 if (m->signal_fd < 0)
602 return -errno;
603
604 r = sd_event_add_io(m->event, &m->signal_event_source, m->signal_fd, EPOLLIN, manager_dispatch_signal_fd, m);
605 if (r < 0)
606 return r;
607
608 (void) sd_event_source_set_description(m->signal_event_source, "manager-signal");
609
610 /* Process signals a bit earlier than the rest of things, but later than notify_fd processing, so that the
611 * notify processing can still figure out to which process/service a message belongs, before we reap the
612 * process. Also, process this before handling cgroup notifications, so that we always collect child exit
613 * status information before detecting that there's no process in a cgroup. */
614 r = sd_event_source_set_priority(m->signal_event_source, SD_EVENT_PRIORITY_NORMAL-6);
615 if (r < 0)
616 return r;
617
618 if (MANAGER_IS_SYSTEM(m))
619 return enable_special_signals(m);
620
621 return 0;
622 }
623
624 static char** sanitize_environment(char **l) {
625
626 /* Let's remove some environment variables that we need ourselves to communicate with our clients */
627 strv_env_unset_many(
628 l,
629 "CACHE_DIRECTORY",
630 "CONFIGURATION_DIRECTORY",
631 "CREDENTIALS_DIRECTORY",
632 "EXIT_CODE",
633 "EXIT_STATUS",
634 "INVOCATION_ID",
635 "JOURNAL_STREAM",
636 "LISTEN_FDNAMES",
637 "LISTEN_FDS",
638 "LISTEN_PID",
639 "LOGS_DIRECTORY",
640 "MAINPID",
641 "MANAGERPID",
642 "NOTIFY_SOCKET",
643 "PIDFILE",
644 "REMOTE_ADDR",
645 "REMOTE_PORT",
646 "RUNTIME_DIRECTORY",
647 "SERVICE_RESULT",
648 "STATE_DIRECTORY",
649 "WATCHDOG_PID",
650 "WATCHDOG_USEC",
651 NULL);
652
653 /* Let's order the environment alphabetically, just to make it pretty */
654 return strv_sort(l);
655 }
656
657 int manager_default_environment(Manager *m) {
658 int r;
659
660 assert(m);
661
662 m->transient_environment = strv_free(m->transient_environment);
663
664 if (MANAGER_IS_SYSTEM(m)) {
665 /* The system manager always starts with a clean
666 * environment for its children. It does not import
667 * the kernel's or the parents' exported variables.
668 *
669 * The initial passed environment is untouched to keep
670 * /proc/self/environ valid; it is used for tagging
671 * the init process inside containers. */
672 m->transient_environment = strv_new("PATH=" DEFAULT_PATH);
673 if (!m->transient_environment)
674 return log_oom();
675
676 /* Import locale variables LC_*= from configuration */
677 (void) locale_setup(&m->transient_environment);
678 } else {
679 /* The user manager passes its own environment along to its children, except for $PATH. */
680 m->transient_environment = strv_copy(environ);
681 if (!m->transient_environment)
682 return log_oom();
683
684 r = strv_env_replace_strdup(&m->transient_environment, "PATH=" DEFAULT_USER_PATH);
685 if (r < 0)
686 return log_oom();
687 }
688
689 sanitize_environment(m->transient_environment);
690
691 return 0;
692 }
693
694 static int manager_setup_prefix(Manager *m) {
695 struct table_entry {
696 uint64_t type;
697 const char *suffix;
698 };
699
700 static const struct table_entry paths_system[_EXEC_DIRECTORY_TYPE_MAX] = {
701 [EXEC_DIRECTORY_RUNTIME] = { SD_PATH_SYSTEM_RUNTIME, NULL },
702 [EXEC_DIRECTORY_STATE] = { SD_PATH_SYSTEM_STATE_PRIVATE, NULL },
703 [EXEC_DIRECTORY_CACHE] = { SD_PATH_SYSTEM_STATE_CACHE, NULL },
704 [EXEC_DIRECTORY_LOGS] = { SD_PATH_SYSTEM_STATE_LOGS, NULL },
705 [EXEC_DIRECTORY_CONFIGURATION] = { SD_PATH_SYSTEM_CONFIGURATION, NULL },
706 };
707
708 static const struct table_entry paths_user[_EXEC_DIRECTORY_TYPE_MAX] = {
709 [EXEC_DIRECTORY_RUNTIME] = { SD_PATH_USER_RUNTIME, NULL },
710 [EXEC_DIRECTORY_STATE] = { SD_PATH_USER_CONFIGURATION, NULL },
711 [EXEC_DIRECTORY_CACHE] = { SD_PATH_USER_STATE_CACHE, NULL },
712 [EXEC_DIRECTORY_LOGS] = { SD_PATH_USER_CONFIGURATION, "log" },
713 [EXEC_DIRECTORY_CONFIGURATION] = { SD_PATH_USER_CONFIGURATION, NULL },
714 };
715
716 assert(m);
717
718 const struct table_entry *p = MANAGER_IS_SYSTEM(m) ? paths_system : paths_user;
719 int r;
720
721 for (ExecDirectoryType i = 0; i < _EXEC_DIRECTORY_TYPE_MAX; i++) {
722 r = sd_path_lookup(p[i].type, p[i].suffix, &m->prefix[i]);
723 if (r < 0)
724 return log_warning_errno(r, "Failed to lookup %s path: %m",
725 exec_directory_type_to_string(i));
726 }
727
728 return 0;
729 }
730
731 static void manager_free_unit_name_maps(Manager *m) {
732 m->unit_id_map = hashmap_free(m->unit_id_map);
733 m->unit_name_map = hashmap_free(m->unit_name_map);
734 m->unit_path_cache = set_free(m->unit_path_cache);
735 m->unit_cache_timestamp_hash = 0;
736 }
737
738 static int manager_setup_run_queue(Manager *m) {
739 int r;
740
741 assert(m);
742 assert(!m->run_queue_event_source);
743
744 r = sd_event_add_defer(m->event, &m->run_queue_event_source, manager_dispatch_run_queue, m);
745 if (r < 0)
746 return r;
747
748 r = sd_event_source_set_priority(m->run_queue_event_source, SD_EVENT_PRIORITY_IDLE);
749 if (r < 0)
750 return r;
751
752 r = sd_event_source_set_enabled(m->run_queue_event_source, SD_EVENT_OFF);
753 if (r < 0)
754 return r;
755
756 (void) sd_event_source_set_description(m->run_queue_event_source, "manager-run-queue");
757
758 return 0;
759 }
760
761 static int manager_setup_sigchld_event_source(Manager *m) {
762 int r;
763
764 assert(m);
765 assert(!m->sigchld_event_source);
766
767 r = sd_event_add_defer(m->event, &m->sigchld_event_source, manager_dispatch_sigchld, m);
768 if (r < 0)
769 return r;
770
771 r = sd_event_source_set_priority(m->sigchld_event_source, SD_EVENT_PRIORITY_NORMAL-7);
772 if (r < 0)
773 return r;
774
775 r = sd_event_source_set_enabled(m->sigchld_event_source, SD_EVENT_OFF);
776 if (r < 0)
777 return r;
778
779 (void) sd_event_source_set_description(m->sigchld_event_source, "manager-sigchld");
780
781 return 0;
782 }
783
784 int manager_new(UnitFileScope scope, ManagerTestRunFlags test_run_flags, Manager **_m) {
785 _cleanup_(manager_freep) Manager *m = NULL;
786 const char *e;
787 int r;
788
789 assert(_m);
790 assert(IN_SET(scope, UNIT_FILE_SYSTEM, UNIT_FILE_USER));
791
792 m = new(Manager, 1);
793 if (!m)
794 return -ENOMEM;
795
796 *m = (Manager) {
797 .unit_file_scope = scope,
798 .objective = _MANAGER_OBJECTIVE_INVALID,
799
800 .status_unit_format = STATUS_UNIT_FORMAT_DEFAULT,
801
802 .default_timer_accuracy_usec = USEC_PER_MINUTE,
803 .default_memory_accounting = MEMORY_ACCOUNTING_DEFAULT,
804 .default_tasks_accounting = true,
805 .default_tasks_max = TASKS_MAX_UNSET,
806 .default_timeout_start_usec = DEFAULT_TIMEOUT_USEC,
807 .default_timeout_stop_usec = DEFAULT_TIMEOUT_USEC,
808 .default_restart_usec = DEFAULT_RESTART_USEC,
809
810 .original_log_level = -1,
811 .original_log_target = _LOG_TARGET_INVALID,
812
813 .watchdog_overridden[WATCHDOG_RUNTIME] = USEC_INFINITY,
814 .watchdog_overridden[WATCHDOG_REBOOT] = USEC_INFINITY,
815 .watchdog_overridden[WATCHDOG_KEXEC] = USEC_INFINITY,
816 .watchdog_overridden[WATCHDOG_PRETIMEOUT] = USEC_INFINITY,
817
818 .show_status_overridden = _SHOW_STATUS_INVALID,
819
820 .notify_fd = -1,
821 .cgroups_agent_fd = -1,
822 .signal_fd = -1,
823 .time_change_fd = -1,
824 .user_lookup_fds = { -1, -1 },
825 .private_listen_fd = -1,
826 .dev_autofs_fd = -1,
827 .cgroup_inotify_fd = -1,
828 .pin_cgroupfs_fd = -1,
829 .ask_password_inotify_fd = -1,
830 .idle_pipe = { -1, -1, -1, -1},
831
832 /* start as id #1, so that we can leave #0 around as "null-like" value */
833 .current_job_id = 1,
834
835 .have_ask_password = -EINVAL, /* we don't know */
836 .first_boot = -1,
837 .test_run_flags = test_run_flags,
838
839 .default_oom_policy = OOM_STOP,
840 };
841
842 #if ENABLE_EFI
843 if (MANAGER_IS_SYSTEM(m) && detect_container() <= 0)
844 boot_timestamps(m->timestamps + MANAGER_TIMESTAMP_USERSPACE,
845 m->timestamps + MANAGER_TIMESTAMP_FIRMWARE,
846 m->timestamps + MANAGER_TIMESTAMP_LOADER);
847 #endif
848
849 /* Prepare log fields we can use for structured logging */
850 if (MANAGER_IS_SYSTEM(m)) {
851 m->unit_log_field = "UNIT=";
852 m->unit_log_format_string = "UNIT=%s";
853
854 m->invocation_log_field = "INVOCATION_ID=";
855 m->invocation_log_format_string = "INVOCATION_ID=%s";
856 } else {
857 m->unit_log_field = "USER_UNIT=";
858 m->unit_log_format_string = "USER_UNIT=%s";
859
860 m->invocation_log_field = "USER_INVOCATION_ID=";
861 m->invocation_log_format_string = "USER_INVOCATION_ID=%s";
862 }
863
864 /* Reboot immediately if the user hits C-A-D more often than 7x per 2s */
865 m->ctrl_alt_del_ratelimit = (RateLimit) { .interval = 2 * USEC_PER_SEC, .burst = 7 };
866
867 r = manager_default_environment(m);
868 if (r < 0)
869 return r;
870
871 r = hashmap_ensure_allocated(&m->units, &string_hash_ops);
872 if (r < 0)
873 return r;
874
875 r = hashmap_ensure_allocated(&m->cgroup_unit, &path_hash_ops);
876 if (r < 0)
877 return r;
878
879 r = hashmap_ensure_allocated(&m->watch_bus, &string_hash_ops);
880 if (r < 0)
881 return r;
882
883 r = prioq_ensure_allocated(&m->run_queue, compare_job_priority);
884 if (r < 0)
885 return r;
886
887 r = manager_setup_prefix(m);
888 if (r < 0)
889 return r;
890
891 r = get_credentials_dir(&e);
892 if (r >= 0) {
893 m->received_credentials = strdup(e);
894 if (!m->received_credentials)
895 return -ENOMEM;
896 }
897
898 r = sd_event_default(&m->event);
899 if (r < 0)
900 return r;
901
902 r = manager_setup_run_queue(m);
903 if (r < 0)
904 return r;
905
906 if (FLAGS_SET(test_run_flags, MANAGER_TEST_RUN_MINIMAL)) {
907 m->cgroup_root = strdup("");
908 if (!m->cgroup_root)
909 return -ENOMEM;
910 } else {
911 r = manager_setup_signals(m);
912 if (r < 0)
913 return r;
914
915 r = manager_setup_cgroup(m);
916 if (r < 0)
917 return r;
918
919 r = manager_setup_time_change(m);
920 if (r < 0)
921 return r;
922
923 r = manager_read_timezone_stat(m);
924 if (r < 0)
925 return r;
926
927 (void) manager_setup_timezone_change(m);
928
929 r = manager_setup_sigchld_event_source(m);
930 if (r < 0)
931 return r;
932
933 #if HAVE_LIBBPF
934 if (MANAGER_IS_SYSTEM(m) && lsm_bpf_supported()) {
935 r = lsm_bpf_setup(m);
936 if (r < 0)
937 log_warning_errno(r, "Failed to setup LSM BPF, ignoring: %m");
938 }
939 #endif
940 }
941
942 if (test_run_flags == 0) {
943 if (MANAGER_IS_SYSTEM(m))
944 r = mkdir_label("/run/systemd/units", 0755);
945 else {
946 _cleanup_free_ char *units_path = NULL;
947 r = xdg_user_runtime_dir(&units_path, "/systemd/units");
948 if (r < 0)
949 return r;
950 r = mkdir_p_label(units_path, 0755);
951 }
952
953 if (r < 0 && r != -EEXIST)
954 return r;
955 }
956
957 m->taint_usr =
958 !in_initrd() &&
959 dir_is_empty("/usr") > 0;
960
961 /* Note that we do not set up the notify fd here. We do that after deserialization,
962 * since they might have gotten serialized across the reexec. */
963
964 *_m = TAKE_PTR(m);
965
966 return 0;
967 }
968
969 static int manager_setup_notify(Manager *m) {
970 int r;
971
972 if (MANAGER_IS_TEST_RUN(m))
973 return 0;
974
975 if (m->notify_fd < 0) {
976 _cleanup_close_ int fd = -1;
977 union sockaddr_union sa;
978 socklen_t sa_len;
979
980 /* First free all secondary fields */
981 m->notify_socket = mfree(m->notify_socket);
982 m->notify_event_source = sd_event_source_disable_unref(m->notify_event_source);
983
984 fd = socket(AF_UNIX, SOCK_DGRAM|SOCK_CLOEXEC|SOCK_NONBLOCK, 0);
985 if (fd < 0)
986 return log_error_errno(errno, "Failed to allocate notification socket: %m");
987
988 fd_inc_rcvbuf(fd, NOTIFY_RCVBUF_SIZE);
989
990 m->notify_socket = path_join(m->prefix[EXEC_DIRECTORY_RUNTIME], "systemd/notify");
991 if (!m->notify_socket)
992 return log_oom();
993
994 r = sockaddr_un_set_path(&sa.un, m->notify_socket);
995 if (r < 0)
996 return log_error_errno(r, "Notify socket '%s' not valid for AF_UNIX socket address, refusing.",
997 m->notify_socket);
998 sa_len = r;
999
1000 (void) mkdir_parents_label(m->notify_socket, 0755);
1001 (void) sockaddr_un_unlink(&sa.un);
1002
1003 r = mac_selinux_bind(fd, &sa.sa, sa_len);
1004 if (r < 0)
1005 return log_error_errno(r, "bind(%s) failed: %m", m->notify_socket);
1006
1007 r = setsockopt_int(fd, SOL_SOCKET, SO_PASSCRED, true);
1008 if (r < 0)
1009 return log_error_errno(r, "SO_PASSCRED failed: %m");
1010
1011 m->notify_fd = TAKE_FD(fd);
1012
1013 log_debug("Using notification socket %s", m->notify_socket);
1014 }
1015
1016 if (!m->notify_event_source) {
1017 r = sd_event_add_io(m->event, &m->notify_event_source, m->notify_fd, EPOLLIN, manager_dispatch_notify_fd, m);
1018 if (r < 0)
1019 return log_error_errno(r, "Failed to allocate notify event source: %m");
1020
1021 /* Process notification messages a bit earlier than SIGCHLD, so that we can still identify to which
1022 * service an exit message belongs. */
1023 r = sd_event_source_set_priority(m->notify_event_source, SD_EVENT_PRIORITY_NORMAL-8);
1024 if (r < 0)
1025 return log_error_errno(r, "Failed to set priority of notify event source: %m");
1026
1027 (void) sd_event_source_set_description(m->notify_event_source, "manager-notify");
1028 }
1029
1030 return 0;
1031 }
1032
1033 static int manager_setup_cgroups_agent(Manager *m) {
1034
1035 static const union sockaddr_union sa = {
1036 .un.sun_family = AF_UNIX,
1037 .un.sun_path = "/run/systemd/cgroups-agent",
1038 };
1039 int r;
1040
1041 /* This creates a listening socket we receive cgroups agent messages on. We do not use D-Bus for delivering
1042 * these messages from the cgroups agent binary to PID 1, as the cgroups agent binary is very short-living, and
1043 * each instance of it needs a new D-Bus connection. Since D-Bus connections are SOCK_STREAM/AF_UNIX, on
1044 * overloaded systems the backlog of the D-Bus socket becomes relevant, as not more than the configured number
1045 * of D-Bus connections may be queued until the kernel will start dropping further incoming connections,
1046 * possibly resulting in lost cgroups agent messages. To avoid this, we'll use a private SOCK_DGRAM/AF_UNIX
1047 * socket, where no backlog is relevant as communication may take place without an actual connect() cycle, and
1048 * we thus won't lose messages.
1049 *
1050 * Note that PID 1 will forward the agent message to system bus, so that the user systemd instance may listen
1051 * to it. The system instance hence listens on this special socket, but the user instances listen on the system
1052 * bus for these messages. */
1053
1054 if (MANAGER_IS_TEST_RUN(m))
1055 return 0;
1056
1057 if (!MANAGER_IS_SYSTEM(m))
1058 return 0;
1059
1060 r = cg_unified_controller(SYSTEMD_CGROUP_CONTROLLER);
1061 if (r < 0)
1062 return log_error_errno(r, "Failed to determine whether unified cgroups hierarchy is used: %m");
1063 if (r > 0) /* We don't need this anymore on the unified hierarchy */
1064 return 0;
1065
1066 if (m->cgroups_agent_fd < 0) {
1067 _cleanup_close_ int fd = -1;
1068
1069 /* First free all secondary fields */
1070 m->cgroups_agent_event_source = sd_event_source_disable_unref(m->cgroups_agent_event_source);
1071
1072 fd = socket(AF_UNIX, SOCK_DGRAM|SOCK_CLOEXEC|SOCK_NONBLOCK, 0);
1073 if (fd < 0)
1074 return log_error_errno(errno, "Failed to allocate cgroups agent socket: %m");
1075
1076 fd_inc_rcvbuf(fd, CGROUPS_AGENT_RCVBUF_SIZE);
1077
1078 (void) sockaddr_un_unlink(&sa.un);
1079
1080 /* Only allow root to connect to this socket */
1081 RUN_WITH_UMASK(0077)
1082 r = bind(fd, &sa.sa, SOCKADDR_UN_LEN(sa.un));
1083 if (r < 0)
1084 return log_error_errno(errno, "bind(%s) failed: %m", sa.un.sun_path);
1085
1086 m->cgroups_agent_fd = TAKE_FD(fd);
1087 }
1088
1089 if (!m->cgroups_agent_event_source) {
1090 r = sd_event_add_io(m->event, &m->cgroups_agent_event_source, m->cgroups_agent_fd, EPOLLIN, manager_dispatch_cgroups_agent_fd, m);
1091 if (r < 0)
1092 return log_error_errno(r, "Failed to allocate cgroups agent event source: %m");
1093
1094 /* Process cgroups notifications early. Note that when the agent notification is received
1095 * we'll just enqueue the unit in the cgroup empty queue, hence pick a high priority than
1096 * that. Also see handling of cgroup inotify for the unified cgroup stuff. */
1097 r = sd_event_source_set_priority(m->cgroups_agent_event_source, SD_EVENT_PRIORITY_NORMAL-9);
1098 if (r < 0)
1099 return log_error_errno(r, "Failed to set priority of cgroups agent event source: %m");
1100
1101 (void) sd_event_source_set_description(m->cgroups_agent_event_source, "manager-cgroups-agent");
1102 }
1103
1104 return 0;
1105 }
1106
1107 static int manager_setup_user_lookup_fd(Manager *m) {
1108 int r;
1109
1110 assert(m);
1111
1112 /* Set up the socket pair used for passing UID/GID resolution results from forked off processes to PID
1113 * 1. Background: we can't do name lookups (NSS) from PID 1, since it might involve IPC and thus activation,
1114 * and we might hence deadlock on ourselves. Hence we do all user/group lookups asynchronously from the forked
1115 * off processes right before executing the binaries to start. In order to be able to clean up any IPC objects
1116 * created by a unit (see RemoveIPC=) we need to know in PID 1 the used UID/GID of the executed processes,
1117 * hence we establish this communication channel so that forked off processes can pass their UID/GID
1118 * information back to PID 1. The forked off processes send their resolved UID/GID to PID 1 in a simple
1119 * datagram, along with their unit name, so that we can share one communication socket pair among all units for
1120 * this purpose.
1121 *
1122 * You might wonder why we need a communication channel for this that is independent of the usual notification
1123 * socket scheme (i.e. $NOTIFY_SOCKET). The primary difference is about trust: data sent via the $NOTIFY_SOCKET
1124 * channel is only accepted if it originates from the right unit and if reception was enabled for it. The user
1125 * lookup socket OTOH is only accessible by PID 1 and its children until they exec(), and always available.
1126 *
1127 * Note that this function is called under two circumstances: when we first initialize (in which case we
1128 * allocate both the socket pair and the event source to listen on it), and when we deserialize after a reload
1129 * (in which case the socket pair already exists but we still need to allocate the event source for it). */
1130
1131 if (m->user_lookup_fds[0] < 0) {
1132
1133 /* Free all secondary fields */
1134 safe_close_pair(m->user_lookup_fds);
1135 m->user_lookup_event_source = sd_event_source_disable_unref(m->user_lookup_event_source);
1136
1137 if (socketpair(AF_UNIX, SOCK_DGRAM|SOCK_CLOEXEC, 0, m->user_lookup_fds) < 0)
1138 return log_error_errno(errno, "Failed to allocate user lookup socket: %m");
1139
1140 (void) fd_inc_rcvbuf(m->user_lookup_fds[0], NOTIFY_RCVBUF_SIZE);
1141 }
1142
1143 if (!m->user_lookup_event_source) {
1144 r = sd_event_add_io(m->event, &m->user_lookup_event_source, m->user_lookup_fds[0], EPOLLIN, manager_dispatch_user_lookup_fd, m);
1145 if (r < 0)
1146 return log_error_errno(errno, "Failed to allocate user lookup event source: %m");
1147
1148 /* Process even earlier than the notify event source, so that we always know first about valid UID/GID
1149 * resolutions */
1150 r = sd_event_source_set_priority(m->user_lookup_event_source, SD_EVENT_PRIORITY_NORMAL-11);
1151 if (r < 0)
1152 return log_error_errno(errno, "Failed to set priority of user lookup event source: %m");
1153
1154 (void) sd_event_source_set_description(m->user_lookup_event_source, "user-lookup");
1155 }
1156
1157 return 0;
1158 }
1159
1160 static unsigned manager_dispatch_cleanup_queue(Manager *m) {
1161 Unit *u;
1162 unsigned n = 0;
1163
1164 assert(m);
1165
1166 while ((u = m->cleanup_queue)) {
1167 assert(u->in_cleanup_queue);
1168
1169 unit_free(u);
1170 n++;
1171 }
1172
1173 return n;
1174 }
1175
1176 enum {
1177 GC_OFFSET_IN_PATH, /* This one is on the path we were traveling */
1178 GC_OFFSET_UNSURE, /* No clue */
1179 GC_OFFSET_GOOD, /* We still need this unit */
1180 GC_OFFSET_BAD, /* We don't need this unit anymore */
1181 _GC_OFFSET_MAX
1182 };
1183
1184 static void unit_gc_mark_good(Unit *u, unsigned gc_marker) {
1185 Unit *other;
1186
1187 u->gc_marker = gc_marker + GC_OFFSET_GOOD;
1188
1189 /* Recursively mark referenced units as GOOD as well */
1190 UNIT_FOREACH_DEPENDENCY(other, u, UNIT_ATOM_REFERENCES)
1191 if (other->gc_marker == gc_marker + GC_OFFSET_UNSURE)
1192 unit_gc_mark_good(other, gc_marker);
1193 }
1194
1195 static void unit_gc_sweep(Unit *u, unsigned gc_marker) {
1196 Unit *other;
1197 bool is_bad;
1198
1199 assert(u);
1200
1201 if (IN_SET(u->gc_marker - gc_marker,
1202 GC_OFFSET_GOOD, GC_OFFSET_BAD, GC_OFFSET_UNSURE, GC_OFFSET_IN_PATH))
1203 return;
1204
1205 if (u->in_cleanup_queue)
1206 goto bad;
1207
1208 if (!unit_may_gc(u))
1209 goto good;
1210
1211 u->gc_marker = gc_marker + GC_OFFSET_IN_PATH;
1212
1213 is_bad = true;
1214
1215 UNIT_FOREACH_DEPENDENCY(other, u, UNIT_ATOM_REFERENCED_BY) {
1216 unit_gc_sweep(other, gc_marker);
1217
1218 if (other->gc_marker == gc_marker + GC_OFFSET_GOOD)
1219 goto good;
1220
1221 if (other->gc_marker != gc_marker + GC_OFFSET_BAD)
1222 is_bad = false;
1223 }
1224
1225 LIST_FOREACH(refs_by_target, ref, u->refs_by_target) {
1226 unit_gc_sweep(ref->source, gc_marker);
1227
1228 if (ref->source->gc_marker == gc_marker + GC_OFFSET_GOOD)
1229 goto good;
1230
1231 if (ref->source->gc_marker != gc_marker + GC_OFFSET_BAD)
1232 is_bad = false;
1233 }
1234
1235 if (is_bad)
1236 goto bad;
1237
1238 /* We were unable to find anything out about this entry, so
1239 * let's investigate it later */
1240 u->gc_marker = gc_marker + GC_OFFSET_UNSURE;
1241 unit_add_to_gc_queue(u);
1242 return;
1243
1244 bad:
1245 /* We definitely know that this one is not useful anymore, so
1246 * let's mark it for deletion */
1247 u->gc_marker = gc_marker + GC_OFFSET_BAD;
1248 unit_add_to_cleanup_queue(u);
1249 return;
1250
1251 good:
1252 unit_gc_mark_good(u, gc_marker);
1253 }
1254
1255 static unsigned manager_dispatch_gc_unit_queue(Manager *m) {
1256 unsigned n = 0, gc_marker;
1257 Unit *u;
1258
1259 assert(m);
1260
1261 /* log_debug("Running GC..."); */
1262
1263 m->gc_marker += _GC_OFFSET_MAX;
1264 if (m->gc_marker + _GC_OFFSET_MAX <= _GC_OFFSET_MAX)
1265 m->gc_marker = 1;
1266
1267 gc_marker = m->gc_marker;
1268
1269 while ((u = m->gc_unit_queue)) {
1270 assert(u->in_gc_queue);
1271
1272 unit_gc_sweep(u, gc_marker);
1273
1274 LIST_REMOVE(gc_queue, m->gc_unit_queue, u);
1275 u->in_gc_queue = false;
1276
1277 n++;
1278
1279 if (IN_SET(u->gc_marker - gc_marker,
1280 GC_OFFSET_BAD, GC_OFFSET_UNSURE)) {
1281 if (u->id)
1282 log_unit_debug(u, "Collecting.");
1283 u->gc_marker = gc_marker + GC_OFFSET_BAD;
1284 unit_add_to_cleanup_queue(u);
1285 }
1286 }
1287
1288 return n;
1289 }
1290
1291 static unsigned manager_dispatch_gc_job_queue(Manager *m) {
1292 unsigned n = 0;
1293 Job *j;
1294
1295 assert(m);
1296
1297 while ((j = m->gc_job_queue)) {
1298 assert(j->in_gc_queue);
1299
1300 LIST_REMOVE(gc_queue, m->gc_job_queue, j);
1301 j->in_gc_queue = false;
1302
1303 n++;
1304
1305 if (!job_may_gc(j))
1306 continue;
1307
1308 log_unit_debug(j->unit, "Collecting job.");
1309 (void) job_finish_and_invalidate(j, JOB_COLLECTED, false, false);
1310 }
1311
1312 return n;
1313 }
1314
1315 static unsigned manager_dispatch_stop_when_unneeded_queue(Manager *m) {
1316 unsigned n = 0;
1317 Unit *u;
1318 int r;
1319
1320 assert(m);
1321
1322 while ((u = m->stop_when_unneeded_queue)) {
1323 _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL;
1324
1325 assert(u->in_stop_when_unneeded_queue);
1326 LIST_REMOVE(stop_when_unneeded_queue, m->stop_when_unneeded_queue, u);
1327 u->in_stop_when_unneeded_queue = false;
1328
1329 n++;
1330
1331 if (!unit_is_unneeded(u))
1332 continue;
1333
1334 log_unit_debug(u, "Unit is not needed anymore.");
1335
1336 /* If stopping a unit fails continuously we might enter a stop loop here, hence stop acting on the
1337 * service being unnecessary after a while. */
1338
1339 if (!ratelimit_below(&u->auto_start_stop_ratelimit)) {
1340 log_unit_warning(u, "Unit not needed anymore, but not stopping since we tried this too often recently.");
1341 continue;
1342 }
1343
1344 /* Ok, nobody needs us anymore. Sniff. Then let's commit suicide */
1345 r = manager_add_job(u->manager, JOB_STOP, u, JOB_FAIL, NULL, &error, NULL);
1346 if (r < 0)
1347 log_unit_warning_errno(u, r, "Failed to enqueue stop job, ignoring: %s", bus_error_message(&error, r));
1348 }
1349
1350 return n;
1351 }
1352
1353 static unsigned manager_dispatch_start_when_upheld_queue(Manager *m) {
1354 unsigned n = 0;
1355 Unit *u;
1356 int r;
1357
1358 assert(m);
1359
1360 while ((u = m->start_when_upheld_queue)) {
1361 _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL;
1362 Unit *culprit = NULL;
1363
1364 assert(u->in_start_when_upheld_queue);
1365 LIST_REMOVE(start_when_upheld_queue, m->start_when_upheld_queue, u);
1366 u->in_start_when_upheld_queue = false;
1367
1368 n++;
1369
1370 if (!unit_is_upheld_by_active(u, &culprit))
1371 continue;
1372
1373 log_unit_debug(u, "Unit is started because upheld by active unit %s.", culprit->id);
1374
1375 /* If stopping a unit fails continuously we might enter a stop loop here, hence stop acting on the
1376 * service being unnecessary after a while. */
1377
1378 if (!ratelimit_below(&u->auto_start_stop_ratelimit)) {
1379 log_unit_warning(u, "Unit needs to be started because active unit %s upholds it, but not starting since we tried this too often recently.", culprit->id);
1380 continue;
1381 }
1382
1383 r = manager_add_job(u->manager, JOB_START, u, JOB_FAIL, NULL, &error, NULL);
1384 if (r < 0)
1385 log_unit_warning_errno(u, r, "Failed to enqueue start job, ignoring: %s", bus_error_message(&error, r));
1386 }
1387
1388 return n;
1389 }
1390
1391 static unsigned manager_dispatch_stop_when_bound_queue(Manager *m) {
1392 unsigned n = 0;
1393 Unit *u;
1394 int r;
1395
1396 assert(m);
1397
1398 while ((u = m->stop_when_bound_queue)) {
1399 _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL;
1400 Unit *culprit = NULL;
1401
1402 assert(u->in_stop_when_bound_queue);
1403 LIST_REMOVE(stop_when_bound_queue, m->stop_when_bound_queue, u);
1404 u->in_stop_when_bound_queue = false;
1405
1406 n++;
1407
1408 if (!unit_is_bound_by_inactive(u, &culprit))
1409 continue;
1410
1411 log_unit_debug(u, "Unit is stopped because bound to inactive unit %s.", culprit->id);
1412
1413 /* If stopping a unit fails continuously we might enter a stop loop here, hence stop acting on the
1414 * service being unnecessary after a while. */
1415
1416 if (!ratelimit_below(&u->auto_start_stop_ratelimit)) {
1417 log_unit_warning(u, "Unit needs to be stopped because it is bound to inactive unit %s it, but not stopping since we tried this too often recently.", culprit->id);
1418 continue;
1419 }
1420
1421 r = manager_add_job(u->manager, JOB_STOP, u, JOB_REPLACE, NULL, &error, NULL);
1422 if (r < 0)
1423 log_unit_warning_errno(u, r, "Failed to enqueue stop job, ignoring: %s", bus_error_message(&error, r));
1424 }
1425
1426 return n;
1427 }
1428
1429 static void manager_clear_jobs_and_units(Manager *m) {
1430 Unit *u;
1431
1432 assert(m);
1433
1434 while ((u = hashmap_first(m->units)))
1435 unit_free(u);
1436
1437 manager_dispatch_cleanup_queue(m);
1438
1439 assert(!m->load_queue);
1440 assert(prioq_isempty(m->run_queue));
1441 assert(!m->dbus_unit_queue);
1442 assert(!m->dbus_job_queue);
1443 assert(!m->cleanup_queue);
1444 assert(!m->gc_unit_queue);
1445 assert(!m->gc_job_queue);
1446 assert(!m->cgroup_realize_queue);
1447 assert(!m->cgroup_empty_queue);
1448 assert(!m->cgroup_oom_queue);
1449 assert(!m->target_deps_queue);
1450 assert(!m->stop_when_unneeded_queue);
1451 assert(!m->start_when_upheld_queue);
1452 assert(!m->stop_when_bound_queue);
1453
1454 assert(hashmap_isempty(m->jobs));
1455 assert(hashmap_isempty(m->units));
1456
1457 m->n_on_console = 0;
1458 m->n_running_jobs = 0;
1459 m->n_installed_jobs = 0;
1460 m->n_failed_jobs = 0;
1461 }
1462
1463 Manager* manager_free(Manager *m) {
1464 if (!m)
1465 return NULL;
1466
1467 manager_clear_jobs_and_units(m);
1468
1469 for (UnitType c = 0; c < _UNIT_TYPE_MAX; c++)
1470 if (unit_vtable[c]->shutdown)
1471 unit_vtable[c]->shutdown(m);
1472
1473 /* Keep the cgroup hierarchy in place except when we know we are going down for good */
1474 manager_shutdown_cgroup(m, IN_SET(m->objective, MANAGER_EXIT, MANAGER_REBOOT, MANAGER_POWEROFF, MANAGER_HALT, MANAGER_KEXEC));
1475
1476 lookup_paths_flush_generator(&m->lookup_paths);
1477
1478 bus_done(m);
1479 manager_varlink_done(m);
1480
1481 exec_runtime_vacuum(m);
1482 hashmap_free(m->exec_runtime_by_id);
1483
1484 dynamic_user_vacuum(m, false);
1485 hashmap_free(m->dynamic_users);
1486
1487 hashmap_free(m->units);
1488 hashmap_free(m->units_by_invocation_id);
1489 hashmap_free(m->jobs);
1490 hashmap_free(m->watch_pids);
1491 hashmap_free(m->watch_bus);
1492
1493 prioq_free(m->run_queue);
1494
1495 set_free(m->startup_units);
1496 set_free(m->failed_units);
1497
1498 sd_event_source_unref(m->signal_event_source);
1499 sd_event_source_unref(m->sigchld_event_source);
1500 sd_event_source_unref(m->notify_event_source);
1501 sd_event_source_unref(m->cgroups_agent_event_source);
1502 sd_event_source_unref(m->time_change_event_source);
1503 sd_event_source_unref(m->timezone_change_event_source);
1504 sd_event_source_unref(m->jobs_in_progress_event_source);
1505 sd_event_source_unref(m->run_queue_event_source);
1506 sd_event_source_unref(m->user_lookup_event_source);
1507
1508 safe_close(m->signal_fd);
1509 safe_close(m->notify_fd);
1510 safe_close(m->cgroups_agent_fd);
1511 safe_close(m->time_change_fd);
1512 safe_close_pair(m->user_lookup_fds);
1513
1514 manager_close_ask_password(m);
1515
1516 manager_close_idle_pipe(m);
1517
1518 sd_event_unref(m->event);
1519
1520 free(m->notify_socket);
1521
1522 lookup_paths_free(&m->lookup_paths);
1523 strv_free(m->transient_environment);
1524 strv_free(m->client_environment);
1525
1526 hashmap_free(m->cgroup_unit);
1527 manager_free_unit_name_maps(m);
1528
1529 free(m->switch_root);
1530 free(m->switch_root_init);
1531
1532 rlimit_free_all(m->rlimit);
1533
1534 assert(hashmap_isempty(m->units_requiring_mounts_for));
1535 hashmap_free(m->units_requiring_mounts_for);
1536
1537 hashmap_free(m->uid_refs);
1538 hashmap_free(m->gid_refs);
1539
1540 for (ExecDirectoryType dt = 0; dt < _EXEC_DIRECTORY_TYPE_MAX; dt++)
1541 m->prefix[dt] = mfree(m->prefix[dt]);
1542 free(m->received_credentials);
1543
1544 free(m->watchdog_pretimeout_governor);
1545 free(m->watchdog_pretimeout_governor_overridden);
1546
1547 #if BPF_FRAMEWORK
1548 lsm_bpf_destroy(m->restrict_fs);
1549 #endif
1550
1551 return mfree(m);
1552 }
1553
1554 static void manager_enumerate_perpetual(Manager *m) {
1555 assert(m);
1556
1557 if (FLAGS_SET(m->test_run_flags, MANAGER_TEST_RUN_MINIMAL))
1558 return;
1559
1560 /* Let's ask every type to load all units from disk/kernel that it might know */
1561 for (UnitType c = 0; c < _UNIT_TYPE_MAX; c++) {
1562 if (!unit_type_supported(c)) {
1563 log_debug("Unit type .%s is not supported on this system.", unit_type_to_string(c));
1564 continue;
1565 }
1566
1567 if (unit_vtable[c]->enumerate_perpetual)
1568 unit_vtable[c]->enumerate_perpetual(m);
1569 }
1570 }
1571
1572 static void manager_enumerate(Manager *m) {
1573 assert(m);
1574
1575 if (FLAGS_SET(m->test_run_flags, MANAGER_TEST_RUN_MINIMAL))
1576 return;
1577
1578 /* Let's ask every type to load all units from disk/kernel that it might know */
1579 for (UnitType c = 0; c < _UNIT_TYPE_MAX; c++) {
1580 if (!unit_type_supported(c)) {
1581 log_debug("Unit type .%s is not supported on this system.", unit_type_to_string(c));
1582 continue;
1583 }
1584
1585 if (unit_vtable[c]->enumerate)
1586 unit_vtable[c]->enumerate(m);
1587 }
1588
1589 manager_dispatch_load_queue(m);
1590 }
1591
1592 static void manager_coldplug(Manager *m) {
1593 Unit *u;
1594 char *k;
1595 int r;
1596
1597 assert(m);
1598
1599 log_debug("Invoking unit coldplug() handlers…");
1600
1601 /* Let's place the units back into their deserialized state */
1602 HASHMAP_FOREACH_KEY(u, k, m->units) {
1603
1604 /* ignore aliases */
1605 if (u->id != k)
1606 continue;
1607
1608 r = unit_coldplug(u);
1609 if (r < 0)
1610 log_warning_errno(r, "We couldn't coldplug %s, proceeding anyway: %m", u->id);
1611 }
1612 }
1613
1614 static void manager_catchup(Manager *m) {
1615 Unit *u;
1616 char *k;
1617
1618 assert(m);
1619
1620 log_debug("Invoking unit catchup() handlers…");
1621
1622 /* Let's catch up on any state changes that happened while we were reloading/reexecing */
1623 HASHMAP_FOREACH_KEY(u, k, m->units) {
1624
1625 /* ignore aliases */
1626 if (u->id != k)
1627 continue;
1628
1629 unit_catchup(u);
1630 }
1631 }
1632
1633 static void manager_distribute_fds(Manager *m, FDSet *fds) {
1634 Unit *u;
1635
1636 assert(m);
1637
1638 HASHMAP_FOREACH(u, m->units) {
1639
1640 if (fdset_size(fds) <= 0)
1641 break;
1642
1643 if (!UNIT_VTABLE(u)->distribute_fds)
1644 continue;
1645
1646 UNIT_VTABLE(u)->distribute_fds(u, fds);
1647 }
1648 }
1649
1650 static bool manager_dbus_is_running(Manager *m, bool deserialized) {
1651 Unit *u;
1652
1653 assert(m);
1654
1655 /* This checks whether the dbus instance we are supposed to expose our APIs on is up. We check both the socket
1656 * and the service unit. If the 'deserialized' parameter is true we'll check the deserialized state of the unit
1657 * rather than the current one. */
1658
1659 if (MANAGER_IS_TEST_RUN(m))
1660 return false;
1661
1662 u = manager_get_unit(m, SPECIAL_DBUS_SOCKET);
1663 if (!u)
1664 return false;
1665 if ((deserialized ? SOCKET(u)->deserialized_state : SOCKET(u)->state) != SOCKET_RUNNING)
1666 return false;
1667
1668 u = manager_get_unit(m, SPECIAL_DBUS_SERVICE);
1669 if (!u)
1670 return false;
1671 if (!IN_SET((deserialized ? SERVICE(u)->deserialized_state : SERVICE(u)->state), SERVICE_RUNNING, SERVICE_RELOAD))
1672 return false;
1673
1674 return true;
1675 }
1676
1677 static void manager_setup_bus(Manager *m) {
1678 assert(m);
1679
1680 /* Let's set up our private bus connection now, unconditionally */
1681 (void) bus_init_private(m);
1682
1683 /* If we are in --user mode also connect to the system bus now */
1684 if (MANAGER_IS_USER(m))
1685 (void) bus_init_system(m);
1686
1687 /* Let's connect to the bus now, but only if the unit is supposed to be up */
1688 if (manager_dbus_is_running(m, MANAGER_IS_RELOADING(m))) {
1689 (void) bus_init_api(m);
1690
1691 if (MANAGER_IS_SYSTEM(m))
1692 (void) bus_init_system(m);
1693 }
1694 }
1695
1696 static void manager_preset_all(Manager *m) {
1697 int r;
1698
1699 assert(m);
1700
1701 if (m->first_boot <= 0)
1702 return;
1703
1704 if (!MANAGER_IS_SYSTEM(m))
1705 return;
1706
1707 if (MANAGER_IS_TEST_RUN(m))
1708 return;
1709
1710 /* If this is the first boot, and we are in the host system, then preset everything */
1711 r = unit_file_preset_all(UNIT_FILE_SYSTEM, 0, NULL, UNIT_FILE_PRESET_ENABLE_ONLY, NULL, 0);
1712 if (r < 0)
1713 log_full_errno(r == -EEXIST ? LOG_NOTICE : LOG_WARNING, r,
1714 "Failed to populate /etc with preset unit settings, ignoring: %m");
1715 else
1716 log_info("Populated /etc with preset unit settings.");
1717 }
1718
1719 static void manager_ready(Manager *m) {
1720 assert(m);
1721
1722 /* After having loaded everything, do the final round of catching up with what might have changed */
1723
1724 m->objective = MANAGER_OK; /* Tell everyone we are up now */
1725
1726 /* It might be safe to log to the journal now and connect to dbus */
1727 manager_recheck_journal(m);
1728 manager_recheck_dbus(m);
1729
1730 /* Let's finally catch up with any changes that took place while we were reloading/reexecing */
1731 manager_catchup(m);
1732
1733 /* Create a file which will indicate when the manager started loading units the last time. */
1734 if (MANAGER_IS_SYSTEM(m))
1735 (void) touch_file("/run/systemd/systemd-units-load", false,
1736 m->timestamps[MANAGER_TIMESTAMP_UNITS_LOAD].realtime ?: now(CLOCK_REALTIME),
1737 UID_INVALID, GID_INVALID, 0444);
1738
1739 m->honor_device_enumeration = true;
1740 }
1741
1742 Manager* manager_reloading_start(Manager *m) {
1743 m->n_reloading++;
1744 dual_timestamp_get(m->timestamps + MANAGER_TIMESTAMP_UNITS_LOAD);
1745 return m;
1746 }
1747
1748 void manager_reloading_stopp(Manager **m) {
1749 if (*m) {
1750 assert((*m)->n_reloading > 0);
1751 (*m)->n_reloading--;
1752 }
1753 }
1754
1755 int manager_startup(Manager *m, FILE *serialization, FDSet *fds, const char *root) {
1756 int r;
1757
1758 assert(m);
1759
1760 /* If we are running in test mode, we still want to run the generators,
1761 * but we should not touch the real generator directories. */
1762 r = lookup_paths_init(&m->lookup_paths, m->unit_file_scope,
1763 MANAGER_IS_TEST_RUN(m) ? LOOKUP_PATHS_TEMPORARY_GENERATED : 0,
1764 root);
1765 if (r < 0)
1766 return log_error_errno(r, "Failed to initialize path lookup table: %m");
1767
1768 dual_timestamp_get(m->timestamps + manager_timestamp_initrd_mangle(MANAGER_TIMESTAMP_GENERATORS_START));
1769 r = manager_run_environment_generators(m);
1770 if (r >= 0)
1771 r = manager_run_generators(m);
1772 dual_timestamp_get(m->timestamps + manager_timestamp_initrd_mangle(MANAGER_TIMESTAMP_GENERATORS_FINISH));
1773 if (r < 0)
1774 return r;
1775
1776 manager_preset_all(m);
1777
1778 lookup_paths_log(&m->lookup_paths);
1779
1780 {
1781 /* This block is (optionally) done with the reloading counter bumped */
1782 _unused_ _cleanup_(manager_reloading_stopp) Manager *reloading = NULL;
1783
1784 /* If we will deserialize make sure that during enumeration this is already known, so we increase the
1785 * counter here already */
1786 if (serialization)
1787 reloading = manager_reloading_start(m);
1788
1789 /* First, enumerate what we can from all config files */
1790 dual_timestamp_get(m->timestamps + manager_timestamp_initrd_mangle(MANAGER_TIMESTAMP_UNITS_LOAD_START));
1791 manager_enumerate_perpetual(m);
1792 manager_enumerate(m);
1793 dual_timestamp_get(m->timestamps + manager_timestamp_initrd_mangle(MANAGER_TIMESTAMP_UNITS_LOAD_FINISH));
1794
1795 /* Second, deserialize if there is something to deserialize */
1796 if (serialization) {
1797 r = manager_deserialize(m, serialization, fds);
1798 if (r < 0)
1799 return log_error_errno(r, "Deserialization failed: %m");
1800 }
1801
1802 /* Any fds left? Find some unit which wants them. This is useful to allow container managers to pass
1803 * some file descriptors to us pre-initialized. This enables socket-based activation of entire
1804 * containers. */
1805 manager_distribute_fds(m, fds);
1806
1807 /* We might have deserialized the notify fd, but if we didn't then let's create the bus now */
1808 r = manager_setup_notify(m);
1809 if (r < 0)
1810 /* No sense to continue without notifications, our children would fail anyway. */
1811 return r;
1812
1813 r = manager_setup_cgroups_agent(m);
1814 if (r < 0)
1815 /* Likewise, no sense to continue without empty cgroup notifications. */
1816 return r;
1817
1818 r = manager_setup_user_lookup_fd(m);
1819 if (r < 0)
1820 /* This shouldn't fail, except if things are really broken. */
1821 return r;
1822
1823 /* Connect to the bus if we are good for it */
1824 manager_setup_bus(m);
1825
1826 /* Now that we are connected to all possible buses, let's deserialize who is tracking us. */
1827 r = bus_track_coldplug(m, &m->subscribed, false, m->deserialized_subscribed);
1828 if (r < 0)
1829 log_warning_errno(r, "Failed to deserialized tracked clients, ignoring: %m");
1830 m->deserialized_subscribed = strv_free(m->deserialized_subscribed);
1831
1832 r = manager_varlink_init(m);
1833 if (r < 0)
1834 log_warning_errno(r, "Failed to set up Varlink, ignoring: %m");
1835
1836 /* Third, fire things up! */
1837 manager_coldplug(m);
1838
1839 /* Clean up runtime objects */
1840 manager_vacuum(m);
1841
1842 if (serialization)
1843 /* Let's wait for the UnitNew/JobNew messages being sent, before we notify that the
1844 * reload is finished */
1845 m->send_reloading_done = true;
1846 }
1847
1848 manager_ready(m);
1849
1850 return 0;
1851 }
1852
1853 int manager_add_job(
1854 Manager *m,
1855 JobType type,
1856 Unit *unit,
1857 JobMode mode,
1858 Set *affected_jobs,
1859 sd_bus_error *error,
1860 Job **ret) {
1861
1862 Transaction *tr;
1863 int r;
1864
1865 assert(m);
1866 assert(type < _JOB_TYPE_MAX);
1867 assert(unit);
1868 assert(mode < _JOB_MODE_MAX);
1869
1870 if (mode == JOB_ISOLATE && type != JOB_START)
1871 return sd_bus_error_set(error, SD_BUS_ERROR_INVALID_ARGS, "Isolate is only valid for start.");
1872
1873 if (mode == JOB_ISOLATE && !unit->allow_isolate)
1874 return sd_bus_error_set(error, BUS_ERROR_NO_ISOLATION, "Operation refused, unit may not be isolated.");
1875
1876 if (mode == JOB_TRIGGERING && type != JOB_STOP)
1877 return sd_bus_error_set(error, SD_BUS_ERROR_INVALID_ARGS, "--job-mode=triggering is only valid for stop.");
1878
1879 log_unit_debug(unit, "Trying to enqueue job %s/%s/%s", unit->id, job_type_to_string(type), job_mode_to_string(mode));
1880
1881 type = job_type_collapse(type, unit);
1882
1883 tr = transaction_new(mode == JOB_REPLACE_IRREVERSIBLY);
1884 if (!tr)
1885 return -ENOMEM;
1886
1887 r = transaction_add_job_and_dependencies(tr, type, unit, NULL, true, false,
1888 IN_SET(mode, JOB_IGNORE_DEPENDENCIES, JOB_IGNORE_REQUIREMENTS),
1889 mode == JOB_IGNORE_DEPENDENCIES, error);
1890 if (r < 0)
1891 goto tr_abort;
1892
1893 if (mode == JOB_ISOLATE) {
1894 r = transaction_add_isolate_jobs(tr, m);
1895 if (r < 0)
1896 goto tr_abort;
1897 }
1898
1899 if (mode == JOB_TRIGGERING) {
1900 r = transaction_add_triggering_jobs(tr, unit);
1901 if (r < 0)
1902 goto tr_abort;
1903 }
1904
1905 r = transaction_activate(tr, m, mode, affected_jobs, error);
1906 if (r < 0)
1907 goto tr_abort;
1908
1909 log_unit_debug(unit,
1910 "Enqueued job %s/%s as %u", unit->id,
1911 job_type_to_string(type), (unsigned) tr->anchor_job->id);
1912
1913 if (ret)
1914 *ret = tr->anchor_job;
1915
1916 transaction_free(tr);
1917 return 0;
1918
1919 tr_abort:
1920 transaction_abort(tr);
1921 transaction_free(tr);
1922 return r;
1923 }
1924
1925 int manager_add_job_by_name(Manager *m, JobType type, const char *name, JobMode mode, Set *affected_jobs, sd_bus_error *e, Job **ret) {
1926 Unit *unit = NULL; /* just to appease gcc, initialization is not really necessary */
1927 int r;
1928
1929 assert(m);
1930 assert(type < _JOB_TYPE_MAX);
1931 assert(name);
1932 assert(mode < _JOB_MODE_MAX);
1933
1934 r = manager_load_unit(m, name, NULL, NULL, &unit);
1935 if (r < 0)
1936 return r;
1937 assert(unit);
1938
1939 return manager_add_job(m, type, unit, mode, affected_jobs, e, ret);
1940 }
1941
1942 int manager_add_job_by_name_and_warn(Manager *m, JobType type, const char *name, JobMode mode, Set *affected_jobs, Job **ret) {
1943 _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL;
1944 int r;
1945
1946 assert(m);
1947 assert(type < _JOB_TYPE_MAX);
1948 assert(name);
1949 assert(mode < _JOB_MODE_MAX);
1950
1951 r = manager_add_job_by_name(m, type, name, mode, affected_jobs, &error, ret);
1952 if (r < 0)
1953 return log_warning_errno(r, "Failed to enqueue %s job for %s: %s", job_mode_to_string(mode), name, bus_error_message(&error, r));
1954
1955 return r;
1956 }
1957
1958 int manager_propagate_reload(Manager *m, Unit *unit, JobMode mode, sd_bus_error *e) {
1959 int r;
1960 Transaction *tr;
1961
1962 assert(m);
1963 assert(unit);
1964 assert(mode < _JOB_MODE_MAX);
1965 assert(mode != JOB_ISOLATE); /* Isolate is only valid for start */
1966
1967 tr = transaction_new(mode == JOB_REPLACE_IRREVERSIBLY);
1968 if (!tr)
1969 return -ENOMEM;
1970
1971 /* We need an anchor job */
1972 r = transaction_add_job_and_dependencies(tr, JOB_NOP, unit, NULL, false, false, true, true, e);
1973 if (r < 0)
1974 goto tr_abort;
1975
1976 /* Failure in adding individual dependencies is ignored, so this always succeeds. */
1977 transaction_add_propagate_reload_jobs(tr, unit, tr->anchor_job, mode == JOB_IGNORE_DEPENDENCIES, e);
1978
1979 r = transaction_activate(tr, m, mode, NULL, e);
1980 if (r < 0)
1981 goto tr_abort;
1982
1983 transaction_free(tr);
1984 return 0;
1985
1986 tr_abort:
1987 transaction_abort(tr);
1988 transaction_free(tr);
1989 return r;
1990 }
1991
1992 Job *manager_get_job(Manager *m, uint32_t id) {
1993 assert(m);
1994
1995 return hashmap_get(m->jobs, UINT32_TO_PTR(id));
1996 }
1997
1998 Unit *manager_get_unit(Manager *m, const char *name) {
1999 assert(m);
2000 assert(name);
2001
2002 return hashmap_get(m->units, name);
2003 }
2004
2005 static int manager_dispatch_target_deps_queue(Manager *m) {
2006 Unit *u;
2007 int r = 0;
2008
2009 assert(m);
2010
2011 while ((u = m->target_deps_queue)) {
2012 _cleanup_free_ Unit **targets = NULL;
2013 int n_targets;
2014
2015 assert(u->in_target_deps_queue);
2016
2017 LIST_REMOVE(target_deps_queue, u->manager->target_deps_queue, u);
2018 u->in_target_deps_queue = false;
2019
2020 /* Take an "atomic" snapshot of dependencies here, as the call below will likely modify the
2021 * dependencies, and we can't have it that hash tables we iterate through are modified while
2022 * we are iterating through them. */
2023 n_targets = unit_get_dependency_array(u, UNIT_ATOM_DEFAULT_TARGET_DEPENDENCIES, &targets);
2024 if (n_targets < 0)
2025 return n_targets;
2026
2027 for (int i = 0; i < n_targets; i++) {
2028 r = unit_add_default_target_dependency(u, targets[i]);
2029 if (r < 0)
2030 return r;
2031 }
2032 }
2033
2034 return r;
2035 }
2036
2037 unsigned manager_dispatch_load_queue(Manager *m) {
2038 Unit *u;
2039 unsigned n = 0;
2040
2041 assert(m);
2042
2043 /* Make sure we are not run recursively */
2044 if (m->dispatching_load_queue)
2045 return 0;
2046
2047 m->dispatching_load_queue = true;
2048
2049 /* Dispatches the load queue. Takes a unit from the queue and
2050 * tries to load its data until the queue is empty */
2051
2052 while ((u = m->load_queue)) {
2053 assert(u->in_load_queue);
2054
2055 unit_load(u);
2056 n++;
2057 }
2058
2059 m->dispatching_load_queue = false;
2060
2061 /* Dispatch the units waiting for their target dependencies to be added now, as all targets that we know about
2062 * should be loaded and have aliases resolved */
2063 (void) manager_dispatch_target_deps_queue(m);
2064
2065 return n;
2066 }
2067
2068 bool manager_unit_cache_should_retry_load(Unit *u) {
2069 assert(u);
2070
2071 /* Automatic reloading from disk only applies to units which were not found sometime in the past, and
2072 * the not-found stub is kept pinned in the unit graph by dependencies. For units that were
2073 * previously loaded, we don't do automatic reloading, and daemon-reload is necessary to update. */
2074 if (u->load_state != UNIT_NOT_FOUND)
2075 return false;
2076
2077 /* The cache has been updated since the last time we tried to load the unit. There might be new
2078 * fragment paths to read. */
2079 if (u->manager->unit_cache_timestamp_hash != u->fragment_not_found_timestamp_hash)
2080 return true;
2081
2082 /* The cache needs to be updated because there are modifications on disk. */
2083 return !lookup_paths_timestamp_hash_same(&u->manager->lookup_paths, u->manager->unit_cache_timestamp_hash, NULL);
2084 }
2085
2086 int manager_load_unit_prepare(
2087 Manager *m,
2088 const char *name,
2089 const char *path,
2090 sd_bus_error *e,
2091 Unit **_ret) {
2092
2093 _cleanup_(unit_freep) Unit *cleanup_ret = NULL;
2094 Unit *ret;
2095 UnitType t;
2096 int r;
2097
2098 assert(m);
2099 assert(_ret);
2100
2101 /* This will prepare the unit for loading, but not actually load anything from disk. */
2102
2103 if (path && !path_is_absolute(path))
2104 return sd_bus_error_setf(e, SD_BUS_ERROR_INVALID_ARGS, "Path %s is not absolute.", path);
2105
2106 if (!name) {
2107 /* 'name' and 'path' must not both be null. Check here 'path' using assert_se() to
2108 * workaround a bug in gcc that generates a -Wnonnull warning when calling basename(),
2109 * but this cannot be possible in any code path (See #6119). */
2110 assert_se(path);
2111 name = basename(path);
2112 }
2113
2114 t = unit_name_to_type(name);
2115
2116 if (t == _UNIT_TYPE_INVALID || !unit_name_is_valid(name, UNIT_NAME_PLAIN|UNIT_NAME_INSTANCE)) {
2117 if (unit_name_is_valid(name, UNIT_NAME_TEMPLATE))
2118 return sd_bus_error_setf(e, SD_BUS_ERROR_INVALID_ARGS, "Unit name %s is missing the instance name.", name);
2119
2120 return sd_bus_error_setf(e, SD_BUS_ERROR_INVALID_ARGS, "Unit name %s is not valid.", name);
2121 }
2122
2123 ret = manager_get_unit(m, name);
2124 if (ret) {
2125 /* The time-based cache allows to start new units without daemon-reload,
2126 * but if they are already referenced (because of dependencies or ordering)
2127 * then we have to force a load of the fragment. As an optimization, check
2128 * first if anything in the usual paths was modified since the last time
2129 * the cache was loaded. Also check if the last time an attempt to load the
2130 * unit was made was before the most recent cache refresh, so that we know
2131 * we need to try again — even if the cache is current, it might have been
2132 * updated in a different context before we had a chance to retry loading
2133 * this particular unit. */
2134 if (manager_unit_cache_should_retry_load(ret))
2135 ret->load_state = UNIT_STUB;
2136 else {
2137 *_ret = ret;
2138 return 1;
2139 }
2140 } else {
2141 ret = cleanup_ret = unit_new(m, unit_vtable[t]->object_size);
2142 if (!ret)
2143 return -ENOMEM;
2144 }
2145
2146 if (path) {
2147 r = free_and_strdup(&ret->fragment_path, path);
2148 if (r < 0)
2149 return r;
2150 }
2151
2152 r = unit_add_name(ret, name);
2153 if (r < 0)
2154 return r;
2155
2156 unit_add_to_load_queue(ret);
2157 unit_add_to_dbus_queue(ret);
2158 unit_add_to_gc_queue(ret);
2159
2160 *_ret = ret;
2161 cleanup_ret = NULL;
2162
2163 return 0;
2164 }
2165
2166 int manager_load_unit(
2167 Manager *m,
2168 const char *name,
2169 const char *path,
2170 sd_bus_error *e,
2171 Unit **_ret) {
2172
2173 int r;
2174
2175 assert(m);
2176 assert(_ret);
2177
2178 /* This will load the service information files, but not actually
2179 * start any services or anything. */
2180
2181 r = manager_load_unit_prepare(m, name, path, e, _ret);
2182 if (r != 0)
2183 return r;
2184
2185 manager_dispatch_load_queue(m);
2186
2187 *_ret = unit_follow_merge(*_ret);
2188 return 0;
2189 }
2190
2191 int manager_load_startable_unit_or_warn(
2192 Manager *m,
2193 const char *name,
2194 const char *path,
2195 Unit **ret) {
2196
2197 /* Load a unit, make sure it loaded fully and is not masked. */
2198
2199 _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL;
2200 Unit *unit;
2201 int r;
2202
2203 r = manager_load_unit(m, name, path, &error, &unit);
2204 if (r < 0)
2205 return log_error_errno(r, "Failed to load %s %s: %s",
2206 name ? "unit" : "unit file", name ?: path,
2207 bus_error_message(&error, r));
2208
2209 r = bus_unit_validate_load_state(unit, &error);
2210 if (r < 0)
2211 return log_error_errno(r, "%s", bus_error_message(&error, r));
2212
2213 *ret = unit;
2214 return 0;
2215 }
2216
2217 void manager_clear_jobs(Manager *m) {
2218 Job *j;
2219
2220 assert(m);
2221
2222 while ((j = hashmap_first(m->jobs)))
2223 /* No need to recurse. We're cancelling all jobs. */
2224 job_finish_and_invalidate(j, JOB_CANCELED, false, false);
2225 }
2226
2227 void manager_unwatch_pid(Manager *m, pid_t pid) {
2228 assert(m);
2229
2230 /* First let's drop the unit keyed as "pid". */
2231 (void) hashmap_remove(m->watch_pids, PID_TO_PTR(pid));
2232
2233 /* Then, let's also drop the array keyed by -pid. */
2234 free(hashmap_remove(m->watch_pids, PID_TO_PTR(-pid)));
2235 }
2236
2237 static int manager_dispatch_run_queue(sd_event_source *source, void *userdata) {
2238 Manager *m = userdata;
2239 Job *j;
2240
2241 assert(source);
2242 assert(m);
2243
2244 while ((j = prioq_peek(m->run_queue))) {
2245 assert(j->installed);
2246 assert(j->in_run_queue);
2247
2248 (void) job_run_and_invalidate(j);
2249 }
2250
2251 if (m->n_running_jobs > 0)
2252 manager_watch_jobs_in_progress(m);
2253
2254 if (m->n_on_console > 0)
2255 manager_watch_idle_pipe(m);
2256
2257 return 1;
2258 }
2259
2260 void manager_trigger_run_queue(Manager *m) {
2261 int r;
2262
2263 assert(m);
2264
2265 r = sd_event_source_set_enabled(
2266 m->run_queue_event_source,
2267 prioq_isempty(m->run_queue) ? SD_EVENT_OFF : SD_EVENT_ONESHOT);
2268 if (r < 0)
2269 log_warning_errno(r, "Failed to enable job run queue event source, ignoring: %m");
2270 }
2271
2272 static unsigned manager_dispatch_dbus_queue(Manager *m) {
2273 unsigned n = 0, budget;
2274 Unit *u;
2275 Job *j;
2276
2277 assert(m);
2278
2279 /* When we are reloading, let's not wait with generating signals, since we need to exit the manager as quickly
2280 * as we can. There's no point in throttling generation of signals in that case. */
2281 if (MANAGER_IS_RELOADING(m) || m->send_reloading_done || m->pending_reload_message)
2282 budget = UINT_MAX; /* infinite budget in this case */
2283 else {
2284 /* Anything to do at all? */
2285 if (!m->dbus_unit_queue && !m->dbus_job_queue)
2286 return 0;
2287
2288 /* Do we have overly many messages queued at the moment? If so, let's not enqueue more on top, let's
2289 * sit this cycle out, and process things in a later cycle when the queues got a bit emptier. */
2290 if (manager_bus_n_queued_write(m) > MANAGER_BUS_BUSY_THRESHOLD)
2291 return 0;
2292
2293 /* Only process a certain number of units/jobs per event loop iteration. Even if the bus queue wasn't
2294 * overly full before this call we shouldn't increase it in size too wildly in one step, and we
2295 * shouldn't monopolize CPU time with generating these messages. Note the difference in counting of
2296 * this "budget" and the "threshold" above: the "budget" is decreased only once per generated message,
2297 * regardless how many buses/direct connections it is enqueued on, while the "threshold" is applied to
2298 * each queued instance of bus message, i.e. if the same message is enqueued to five buses/direct
2299 * connections it will be counted five times. This difference in counting ("references"
2300 * vs. "instances") is primarily a result of the fact that it's easier to implement it this way,
2301 * however it also reflects the thinking that the "threshold" should put a limit on used queue memory,
2302 * i.e. space, while the "budget" should put a limit on time. Also note that the "threshold" is
2303 * currently chosen much higher than the "budget". */
2304 budget = MANAGER_BUS_MESSAGE_BUDGET;
2305 }
2306
2307 while (budget != 0 && (u = m->dbus_unit_queue)) {
2308
2309 assert(u->in_dbus_queue);
2310
2311 bus_unit_send_change_signal(u);
2312 n++;
2313
2314 if (budget != UINT_MAX)
2315 budget--;
2316 }
2317
2318 while (budget != 0 && (j = m->dbus_job_queue)) {
2319 assert(j->in_dbus_queue);
2320
2321 bus_job_send_change_signal(j);
2322 n++;
2323
2324 if (budget != UINT_MAX)
2325 budget--;
2326 }
2327
2328 if (m->send_reloading_done) {
2329 m->send_reloading_done = false;
2330 bus_manager_send_reloading(m, false);
2331 n++;
2332 }
2333
2334 if (m->pending_reload_message) {
2335 bus_send_pending_reload_message(m);
2336 n++;
2337 }
2338
2339 return n;
2340 }
2341
2342 static int manager_dispatch_cgroups_agent_fd(sd_event_source *source, int fd, uint32_t revents, void *userdata) {
2343 Manager *m = userdata;
2344 char buf[PATH_MAX];
2345 ssize_t n;
2346
2347 n = recv(fd, buf, sizeof(buf), 0);
2348 if (n < 0)
2349 return log_error_errno(errno, "Failed to read cgroups agent message: %m");
2350 if (n == 0) {
2351 log_error("Got zero-length cgroups agent message, ignoring.");
2352 return 0;
2353 }
2354 if ((size_t) n >= sizeof(buf)) {
2355 log_error("Got overly long cgroups agent message, ignoring.");
2356 return 0;
2357 }
2358
2359 if (memchr(buf, 0, n)) {
2360 log_error("Got cgroups agent message with embedded NUL byte, ignoring.");
2361 return 0;
2362 }
2363 buf[n] = 0;
2364
2365 manager_notify_cgroup_empty(m, buf);
2366 (void) bus_forward_agent_released(m, buf);
2367
2368 return 0;
2369 }
2370
2371 static bool manager_process_barrier_fd(char * const *tags, FDSet *fds) {
2372
2373 /* nothing else must be sent when using BARRIER=1 */
2374 if (strv_contains(tags, "BARRIER=1")) {
2375 if (strv_length(tags) == 1) {
2376 if (fdset_size(fds) != 1)
2377 log_warning("Got incorrect number of fds with BARRIER=1, closing them.");
2378 } else
2379 log_warning("Extra notification messages sent with BARRIER=1, ignoring everything.");
2380
2381 /* Drop the message if BARRIER=1 was found */
2382 return true;
2383 }
2384
2385 return false;
2386 }
2387
2388 static void manager_invoke_notify_message(
2389 Manager *m,
2390 Unit *u,
2391 const struct ucred *ucred,
2392 char * const *tags,
2393 FDSet *fds) {
2394
2395 assert(m);
2396 assert(u);
2397 assert(ucred);
2398 assert(tags);
2399
2400 if (u->notifygen == m->notifygen) /* Already invoked on this same unit in this same iteration? */
2401 return;
2402 u->notifygen = m->notifygen;
2403
2404 if (UNIT_VTABLE(u)->notify_message)
2405 UNIT_VTABLE(u)->notify_message(u, ucred, tags, fds);
2406
2407 else if (DEBUG_LOGGING) {
2408 _cleanup_free_ char *buf = NULL, *x = NULL, *y = NULL;
2409
2410 buf = strv_join(tags, ", ");
2411 if (buf)
2412 x = ellipsize(buf, 20, 90);
2413 if (x)
2414 y = cescape(x);
2415
2416 log_unit_debug(u, "Got notification message \"%s\", ignoring.", strnull(y));
2417 }
2418 }
2419
2420 static int manager_dispatch_notify_fd(sd_event_source *source, int fd, uint32_t revents, void *userdata) {
2421
2422 _cleanup_fdset_free_ FDSet *fds = NULL;
2423 Manager *m = userdata;
2424 char buf[NOTIFY_BUFFER_MAX+1];
2425 struct iovec iovec = {
2426 .iov_base = buf,
2427 .iov_len = sizeof(buf)-1,
2428 };
2429 CMSG_BUFFER_TYPE(CMSG_SPACE(sizeof(struct ucred)) +
2430 CMSG_SPACE(sizeof(int) * NOTIFY_FD_MAX)) control;
2431 struct msghdr msghdr = {
2432 .msg_iov = &iovec,
2433 .msg_iovlen = 1,
2434 .msg_control = &control,
2435 .msg_controllen = sizeof(control),
2436 };
2437
2438 struct cmsghdr *cmsg;
2439 struct ucred *ucred = NULL;
2440 _cleanup_free_ Unit **array_copy = NULL;
2441 _cleanup_strv_free_ char **tags = NULL;
2442 Unit *u1, *u2, **array;
2443 int r, *fd_array = NULL;
2444 size_t n_fds = 0;
2445 bool found = false;
2446 ssize_t n;
2447
2448 assert(m);
2449 assert(m->notify_fd == fd);
2450
2451 if (revents != EPOLLIN) {
2452 log_warning("Got unexpected poll event for notify fd.");
2453 return 0;
2454 }
2455
2456 n = recvmsg_safe(m->notify_fd, &msghdr, MSG_DONTWAIT|MSG_CMSG_CLOEXEC|MSG_TRUNC);
2457 if (n < 0) {
2458 if (ERRNO_IS_TRANSIENT(n))
2459 return 0; /* Spurious wakeup, try again */
2460 if (n == -EXFULL) {
2461 log_warning("Got message with truncated control data (too many fds sent?), ignoring.");
2462 return 0;
2463 }
2464 /* If this is any other, real error, then let's stop processing this socket. This of course
2465 * means we won't take notification messages anymore, but that's still better than busy
2466 * looping around this: being woken up over and over again but being unable to actually read
2467 * the message off the socket. */
2468 return log_error_errno(n, "Failed to receive notification message: %m");
2469 }
2470
2471 CMSG_FOREACH(cmsg, &msghdr) {
2472 if (cmsg->cmsg_level == SOL_SOCKET && cmsg->cmsg_type == SCM_RIGHTS) {
2473
2474 assert(!fd_array);
2475 fd_array = (int*) CMSG_DATA(cmsg);
2476 n_fds = (cmsg->cmsg_len - CMSG_LEN(0)) / sizeof(int);
2477
2478 } else if (cmsg->cmsg_level == SOL_SOCKET &&
2479 cmsg->cmsg_type == SCM_CREDENTIALS &&
2480 cmsg->cmsg_len == CMSG_LEN(sizeof(struct ucred))) {
2481
2482 assert(!ucred);
2483 ucred = (struct ucred*) CMSG_DATA(cmsg);
2484 }
2485 }
2486
2487 if (n_fds > 0) {
2488 assert(fd_array);
2489
2490 r = fdset_new_array(&fds, fd_array, n_fds);
2491 if (r < 0) {
2492 close_many(fd_array, n_fds);
2493 log_oom();
2494 return 0;
2495 }
2496 }
2497
2498 if (!ucred || !pid_is_valid(ucred->pid)) {
2499 log_warning("Received notify message without valid credentials. Ignoring.");
2500 return 0;
2501 }
2502
2503 if ((size_t) n >= sizeof(buf) || (msghdr.msg_flags & MSG_TRUNC)) {
2504 log_warning("Received notify message exceeded maximum size. Ignoring.");
2505 return 0;
2506 }
2507
2508 /* As extra safety check, let's make sure the string we get doesn't contain embedded NUL bytes. We permit one
2509 * trailing NUL byte in the message, but don't expect it. */
2510 if (n > 1 && memchr(buf, 0, n-1)) {
2511 log_warning("Received notify message with embedded NUL bytes. Ignoring.");
2512 return 0;
2513 }
2514
2515 /* Make sure it's NUL-terminated, then parse it to obtain the tags list */
2516 buf[n] = 0;
2517 tags = strv_split_newlines(buf);
2518 if (!tags) {
2519 log_oom();
2520 return 0;
2521 }
2522
2523 /* possibly a barrier fd, let's see */
2524 if (manager_process_barrier_fd(tags, fds))
2525 return 0;
2526
2527 /* Increase the generation counter used for filtering out duplicate unit invocations. */
2528 m->notifygen++;
2529
2530 /* Notify every unit that might be interested, which might be multiple. */
2531 u1 = manager_get_unit_by_pid_cgroup(m, ucred->pid);
2532 u2 = hashmap_get(m->watch_pids, PID_TO_PTR(ucred->pid));
2533 array = hashmap_get(m->watch_pids, PID_TO_PTR(-ucred->pid));
2534 if (array) {
2535 size_t k = 0;
2536
2537 while (array[k])
2538 k++;
2539
2540 array_copy = newdup(Unit*, array, k+1);
2541 if (!array_copy)
2542 log_oom();
2543 }
2544 /* And now invoke the per-unit callbacks. Note that manager_invoke_notify_message() will handle duplicate units
2545 * make sure we only invoke each unit's handler once. */
2546 if (u1) {
2547 manager_invoke_notify_message(m, u1, ucred, tags, fds);
2548 found = true;
2549 }
2550 if (u2) {
2551 manager_invoke_notify_message(m, u2, ucred, tags, fds);
2552 found = true;
2553 }
2554 if (array_copy)
2555 for (size_t i = 0; array_copy[i]; i++) {
2556 manager_invoke_notify_message(m, array_copy[i], ucred, tags, fds);
2557 found = true;
2558 }
2559
2560 if (!found)
2561 log_warning("Cannot find unit for notify message of PID "PID_FMT", ignoring.", ucred->pid);
2562
2563 if (fdset_size(fds) > 0)
2564 log_warning("Got extra auxiliary fds with notification message, closing them.");
2565
2566 return 0;
2567 }
2568
2569 static void manager_invoke_sigchld_event(
2570 Manager *m,
2571 Unit *u,
2572 const siginfo_t *si) {
2573
2574 assert(m);
2575 assert(u);
2576 assert(si);
2577
2578 /* Already invoked the handler of this unit in this iteration? Then don't process this again */
2579 if (u->sigchldgen == m->sigchldgen)
2580 return;
2581 u->sigchldgen = m->sigchldgen;
2582
2583 log_unit_debug(u, "Child "PID_FMT" belongs to %s.", si->si_pid, u->id);
2584 unit_unwatch_pid(u, si->si_pid);
2585
2586 if (UNIT_VTABLE(u)->sigchld_event)
2587 UNIT_VTABLE(u)->sigchld_event(u, si->si_pid, si->si_code, si->si_status);
2588 }
2589
2590 static int manager_dispatch_sigchld(sd_event_source *source, void *userdata) {
2591 Manager *m = userdata;
2592 siginfo_t si = {};
2593 int r;
2594
2595 assert(source);
2596 assert(m);
2597
2598 /* First we call waitid() for a PID and do not reap the zombie. That way we can still access /proc/$PID for it
2599 * while it is a zombie. */
2600
2601 if (waitid(P_ALL, 0, &si, WEXITED|WNOHANG|WNOWAIT) < 0) {
2602
2603 if (errno != ECHILD)
2604 log_error_errno(errno, "Failed to peek for child with waitid(), ignoring: %m");
2605
2606 goto turn_off;
2607 }
2608
2609 if (si.si_pid <= 0)
2610 goto turn_off;
2611
2612 if (IN_SET(si.si_code, CLD_EXITED, CLD_KILLED, CLD_DUMPED)) {
2613 _cleanup_free_ Unit **array_copy = NULL;
2614 _cleanup_free_ char *name = NULL;
2615 Unit *u1, *u2, **array;
2616
2617 (void) get_process_comm(si.si_pid, &name);
2618
2619 log_debug("Child "PID_FMT" (%s) died (code=%s, status=%i/%s)",
2620 si.si_pid, strna(name),
2621 sigchld_code_to_string(si.si_code),
2622 si.si_status,
2623 strna(si.si_code == CLD_EXITED
2624 ? exit_status_to_string(si.si_status, EXIT_STATUS_FULL)
2625 : signal_to_string(si.si_status)));
2626
2627 /* Increase the generation counter used for filtering out duplicate unit invocations */
2628 m->sigchldgen++;
2629
2630 /* And now figure out the unit this belongs to, it might be multiple... */
2631 u1 = manager_get_unit_by_pid_cgroup(m, si.si_pid);
2632 u2 = hashmap_get(m->watch_pids, PID_TO_PTR(si.si_pid));
2633 array = hashmap_get(m->watch_pids, PID_TO_PTR(-si.si_pid));
2634 if (array) {
2635 size_t n = 0;
2636
2637 /* Count how many entries the array has */
2638 while (array[n])
2639 n++;
2640
2641 /* Make a copy of the array so that we don't trip up on the array changing beneath us */
2642 array_copy = newdup(Unit*, array, n+1);
2643 if (!array_copy)
2644 log_oom();
2645 }
2646
2647 /* Finally, execute them all. Note that u1, u2 and the array might contain duplicates, but
2648 * that's fine, manager_invoke_sigchld_event() will ensure we only invoke the handlers once for
2649 * each iteration. */
2650 if (u1) {
2651 /* We check for oom condition, in case we got SIGCHLD before the oom notification.
2652 * We only do this for the cgroup the PID belonged to. */
2653 (void) unit_check_oom(u1);
2654
2655 /* This only logs for now. In the future when the interface for kills/notifications
2656 * is more stable we can extend service results table similar to how kernel oom kills
2657 * are managed. */
2658 (void) unit_check_oomd_kill(u1);
2659
2660 manager_invoke_sigchld_event(m, u1, &si);
2661 }
2662 if (u2)
2663 manager_invoke_sigchld_event(m, u2, &si);
2664 if (array_copy)
2665 for (size_t i = 0; array_copy[i]; i++)
2666 manager_invoke_sigchld_event(m, array_copy[i], &si);
2667 }
2668
2669 /* And now, we actually reap the zombie. */
2670 if (waitid(P_PID, si.si_pid, &si, WEXITED) < 0) {
2671 log_error_errno(errno, "Failed to dequeue child, ignoring: %m");
2672 return 0;
2673 }
2674
2675 return 0;
2676
2677 turn_off:
2678 /* All children processed for now, turn off event source */
2679
2680 r = sd_event_source_set_enabled(m->sigchld_event_source, SD_EVENT_OFF);
2681 if (r < 0)
2682 return log_error_errno(r, "Failed to disable SIGCHLD event source: %m");
2683
2684 return 0;
2685 }
2686
2687 static void manager_start_special(Manager *m, const char *name, JobMode mode) {
2688 Job *job;
2689
2690 if (manager_add_job_by_name_and_warn(m, JOB_START, name, mode, NULL, &job) < 0)
2691 return;
2692
2693 const char *s = unit_status_string(job->unit, NULL);
2694
2695 log_info("Activating special unit %s...", s);
2696
2697 sd_notifyf(false,
2698 "STATUS=Activating special unit %s...", s);
2699 m->status_ready = false;
2700 }
2701
2702 static void manager_handle_ctrl_alt_del(Manager *m) {
2703 /* If the user presses C-A-D more than
2704 * 7 times within 2s, we reboot/shutdown immediately,
2705 * unless it was disabled in system.conf */
2706
2707 if (ratelimit_below(&m->ctrl_alt_del_ratelimit) || m->cad_burst_action == EMERGENCY_ACTION_NONE)
2708 manager_start_special(m, SPECIAL_CTRL_ALT_DEL_TARGET, JOB_REPLACE_IRREVERSIBLY);
2709 else
2710 emergency_action(m, m->cad_burst_action, EMERGENCY_ACTION_WARN, NULL, -1,
2711 "Ctrl-Alt-Del was pressed more than 7 times within 2s");
2712 }
2713
2714 static int manager_dispatch_signal_fd(sd_event_source *source, int fd, uint32_t revents, void *userdata) {
2715 Manager *m = userdata;
2716 ssize_t n;
2717 struct signalfd_siginfo sfsi;
2718 int r;
2719
2720 assert(m);
2721 assert(m->signal_fd == fd);
2722
2723 if (revents != EPOLLIN) {
2724 log_warning("Got unexpected events from signal file descriptor.");
2725 return 0;
2726 }
2727
2728 n = read(m->signal_fd, &sfsi, sizeof(sfsi));
2729 if (n < 0) {
2730 if (ERRNO_IS_TRANSIENT(errno))
2731 return 0;
2732
2733 /* We return an error here, which will kill this handler,
2734 * to avoid a busy loop on read error. */
2735 return log_error_errno(errno, "Reading from signal fd failed: %m");
2736 }
2737 if (n != sizeof(sfsi)) {
2738 log_warning("Truncated read from signal fd (%zu bytes), ignoring!", n);
2739 return 0;
2740 }
2741
2742 log_received_signal(sfsi.ssi_signo == SIGCHLD ||
2743 (sfsi.ssi_signo == SIGTERM && MANAGER_IS_USER(m))
2744 ? LOG_DEBUG : LOG_INFO,
2745 &sfsi);
2746
2747 switch (sfsi.ssi_signo) {
2748
2749 case SIGCHLD:
2750 r = sd_event_source_set_enabled(m->sigchld_event_source, SD_EVENT_ON);
2751 if (r < 0)
2752 log_warning_errno(r, "Failed to enable SIGCHLD event source, ignoring: %m");
2753
2754 break;
2755
2756 case SIGTERM:
2757 if (MANAGER_IS_SYSTEM(m)) {
2758 /* This is for compatibility with the original sysvinit */
2759 if (verify_run_space_and_log("Refusing to reexecute") < 0)
2760 break;
2761
2762 m->objective = MANAGER_REEXECUTE;
2763 break;
2764 }
2765
2766 _fallthrough_;
2767 case SIGINT:
2768 if (MANAGER_IS_SYSTEM(m))
2769 manager_handle_ctrl_alt_del(m);
2770 else
2771 manager_start_special(m, SPECIAL_EXIT_TARGET, JOB_REPLACE_IRREVERSIBLY);
2772 break;
2773
2774 case SIGWINCH:
2775 /* This is a nop on non-init */
2776 if (MANAGER_IS_SYSTEM(m))
2777 manager_start_special(m, SPECIAL_KBREQUEST_TARGET, JOB_REPLACE);
2778
2779 break;
2780
2781 case SIGPWR:
2782 /* This is a nop on non-init */
2783 if (MANAGER_IS_SYSTEM(m))
2784 manager_start_special(m, SPECIAL_SIGPWR_TARGET, JOB_REPLACE);
2785
2786 break;
2787
2788 case SIGUSR1:
2789 if (manager_dbus_is_running(m, false)) {
2790 log_info("Trying to reconnect to bus...");
2791
2792 (void) bus_init_api(m);
2793
2794 if (MANAGER_IS_SYSTEM(m))
2795 (void) bus_init_system(m);
2796 } else
2797 manager_start_special(m, SPECIAL_DBUS_SERVICE, JOB_REPLACE);
2798
2799 break;
2800
2801 case SIGUSR2: {
2802 _cleanup_free_ char *dump = NULL;
2803
2804 r = manager_get_dump_string(m, &dump);
2805 if (r < 0) {
2806 log_warning_errno(errno, "Failed to acquire manager dump: %m");
2807 break;
2808 }
2809
2810 log_dump(LOG_INFO, dump);
2811 break;
2812 }
2813
2814 case SIGHUP:
2815 if (verify_run_space_and_log("Refusing to reload") < 0)
2816 break;
2817
2818 m->objective = MANAGER_RELOAD;
2819 break;
2820
2821 default: {
2822
2823 /* Starting SIGRTMIN+0 */
2824 static const struct {
2825 const char *target;
2826 JobMode mode;
2827 } target_table[] = {
2828 [0] = { SPECIAL_DEFAULT_TARGET, JOB_ISOLATE },
2829 [1] = { SPECIAL_RESCUE_TARGET, JOB_ISOLATE },
2830 [2] = { SPECIAL_EMERGENCY_TARGET, JOB_ISOLATE },
2831 [3] = { SPECIAL_HALT_TARGET, JOB_REPLACE_IRREVERSIBLY },
2832 [4] = { SPECIAL_POWEROFF_TARGET, JOB_REPLACE_IRREVERSIBLY },
2833 [5] = { SPECIAL_REBOOT_TARGET, JOB_REPLACE_IRREVERSIBLY },
2834 [6] = { SPECIAL_KEXEC_TARGET, JOB_REPLACE_IRREVERSIBLY },
2835 };
2836
2837 /* Starting SIGRTMIN+13, so that target halt and system halt are 10 apart */
2838 static const ManagerObjective objective_table[] = {
2839 [0] = MANAGER_HALT,
2840 [1] = MANAGER_POWEROFF,
2841 [2] = MANAGER_REBOOT,
2842 [3] = MANAGER_KEXEC,
2843 };
2844
2845 if ((int) sfsi.ssi_signo >= SIGRTMIN+0 &&
2846 (int) sfsi.ssi_signo < SIGRTMIN+(int) ELEMENTSOF(target_table)) {
2847 int idx = (int) sfsi.ssi_signo - SIGRTMIN;
2848 manager_start_special(m, target_table[idx].target, target_table[idx].mode);
2849 break;
2850 }
2851
2852 if ((int) sfsi.ssi_signo >= SIGRTMIN+13 &&
2853 (int) sfsi.ssi_signo < SIGRTMIN+13+(int) ELEMENTSOF(objective_table)) {
2854 m->objective = objective_table[sfsi.ssi_signo - SIGRTMIN - 13];
2855 break;
2856 }
2857
2858 switch (sfsi.ssi_signo - SIGRTMIN) {
2859
2860 case 20:
2861 manager_override_show_status(m, SHOW_STATUS_YES, "signal");
2862 break;
2863
2864 case 21:
2865 manager_override_show_status(m, SHOW_STATUS_NO, "signal");
2866 break;
2867
2868 case 22:
2869 manager_override_log_level(m, LOG_DEBUG);
2870 break;
2871
2872 case 23:
2873 manager_restore_original_log_level(m);
2874 break;
2875
2876 case 24:
2877 if (MANAGER_IS_USER(m)) {
2878 m->objective = MANAGER_EXIT;
2879 return 0;
2880 }
2881
2882 /* This is a nop on init */
2883 break;
2884
2885 case 25:
2886 m->objective = MANAGER_REEXECUTE;
2887 break;
2888
2889 case 26:
2890 case 29: /* compatibility: used to be mapped to LOG_TARGET_SYSLOG_OR_KMSG */
2891 manager_restore_original_log_target(m);
2892 break;
2893
2894 case 27:
2895 manager_override_log_target(m, LOG_TARGET_CONSOLE);
2896 break;
2897
2898 case 28:
2899 manager_override_log_target(m, LOG_TARGET_KMSG);
2900 break;
2901
2902 default:
2903 log_warning("Got unhandled signal <%s>.", signal_to_string(sfsi.ssi_signo));
2904 }
2905 }}
2906
2907 return 0;
2908 }
2909
2910 static int manager_dispatch_time_change_fd(sd_event_source *source, int fd, uint32_t revents, void *userdata) {
2911 Manager *m = userdata;
2912 Unit *u;
2913
2914 assert(m);
2915 assert(m->time_change_fd == fd);
2916
2917 log_struct(LOG_DEBUG,
2918 "MESSAGE_ID=" SD_MESSAGE_TIME_CHANGE_STR,
2919 LOG_MESSAGE("Time has been changed"));
2920
2921 /* Restart the watch */
2922 (void) manager_setup_time_change(m);
2923
2924 HASHMAP_FOREACH(u, m->units)
2925 if (UNIT_VTABLE(u)->time_change)
2926 UNIT_VTABLE(u)->time_change(u);
2927
2928 return 0;
2929 }
2930
2931 static int manager_dispatch_timezone_change(
2932 sd_event_source *source,
2933 const struct inotify_event *e,
2934 void *userdata) {
2935
2936 Manager *m = userdata;
2937 int changed;
2938 Unit *u;
2939
2940 assert(m);
2941
2942 log_debug("inotify event for /etc/localtime");
2943
2944 changed = manager_read_timezone_stat(m);
2945 if (changed <= 0)
2946 return changed;
2947
2948 /* Something changed, restart the watch, to ensure we watch the new /etc/localtime if it changed */
2949 (void) manager_setup_timezone_change(m);
2950
2951 /* Read the new timezone */
2952 tzset();
2953
2954 log_debug("Timezone has been changed (now: %s).", tzname[daylight]);
2955
2956 HASHMAP_FOREACH(u, m->units)
2957 if (UNIT_VTABLE(u)->timezone_change)
2958 UNIT_VTABLE(u)->timezone_change(u);
2959
2960 return 0;
2961 }
2962
2963 static int manager_dispatch_idle_pipe_fd(sd_event_source *source, int fd, uint32_t revents, void *userdata) {
2964 Manager *m = userdata;
2965
2966 assert(m);
2967 assert(m->idle_pipe[2] == fd);
2968
2969 /* There's at least one Type=idle child that just gave up on us waiting for the boot process to complete. Let's
2970 * now turn off any further console output if there's at least one service that needs console access, so that
2971 * from now on our own output should not spill into that service's output anymore. After all, we support
2972 * Type=idle only to beautify console output and it generally is set on services that want to own the console
2973 * exclusively without our interference. */
2974 m->no_console_output = m->n_on_console > 0;
2975
2976 /* Acknowledge the child's request, and let all all other children know too that they shouldn't wait any longer
2977 * by closing the pipes towards them, which is what they are waiting for. */
2978 manager_close_idle_pipe(m);
2979
2980 return 0;
2981 }
2982
2983 static int manager_dispatch_jobs_in_progress(sd_event_source *source, usec_t usec, void *userdata) {
2984 Manager *m = userdata;
2985 int r;
2986
2987 assert(m);
2988 assert(source);
2989
2990 manager_print_jobs_in_progress(m);
2991
2992 r = sd_event_source_set_time_relative(source, JOBS_IN_PROGRESS_PERIOD_USEC);
2993 if (r < 0)
2994 return r;
2995
2996 return sd_event_source_set_enabled(source, SD_EVENT_ONESHOT);
2997 }
2998
2999 int manager_loop(Manager *m) {
3000 RateLimit rl = { .interval = 1*USEC_PER_SEC, .burst = 50000 };
3001 int r;
3002
3003 assert(m);
3004 assert(m->objective == MANAGER_OK); /* Ensure manager_startup() has been called */
3005
3006 manager_check_finished(m);
3007
3008 /* There might still be some zombies hanging around from before we were exec()'ed. Let's reap them. */
3009 r = sd_event_source_set_enabled(m->sigchld_event_source, SD_EVENT_ON);
3010 if (r < 0)
3011 return log_error_errno(r, "Failed to enable SIGCHLD event source: %m");
3012
3013 while (m->objective == MANAGER_OK) {
3014
3015 (void) watchdog_ping();
3016
3017 if (!ratelimit_below(&rl)) {
3018 /* Yay, something is going seriously wrong, pause a little */
3019 log_warning("Looping too fast. Throttling execution a little.");
3020 sleep(1);
3021 }
3022
3023 if (manager_dispatch_load_queue(m) > 0)
3024 continue;
3025
3026 if (manager_dispatch_gc_job_queue(m) > 0)
3027 continue;
3028
3029 if (manager_dispatch_gc_unit_queue(m) > 0)
3030 continue;
3031
3032 if (manager_dispatch_cleanup_queue(m) > 0)
3033 continue;
3034
3035 if (manager_dispatch_cgroup_realize_queue(m) > 0)
3036 continue;
3037
3038 if (manager_dispatch_start_when_upheld_queue(m) > 0)
3039 continue;
3040
3041 if (manager_dispatch_stop_when_bound_queue(m) > 0)
3042 continue;
3043
3044 if (manager_dispatch_stop_when_unneeded_queue(m) > 0)
3045 continue;
3046
3047 if (manager_dispatch_dbus_queue(m) > 0)
3048 continue;
3049
3050 /* Sleep for watchdog runtime wait time */
3051 r = sd_event_run(m->event, watchdog_runtime_wait());
3052 if (r < 0)
3053 return log_error_errno(r, "Failed to run event loop: %m");
3054 }
3055
3056 return m->objective;
3057 }
3058
3059 int manager_load_unit_from_dbus_path(Manager *m, const char *s, sd_bus_error *e, Unit **_u) {
3060 _cleanup_free_ char *n = NULL;
3061 sd_id128_t invocation_id;
3062 Unit *u;
3063 int r;
3064
3065 assert(m);
3066 assert(s);
3067 assert(_u);
3068
3069 r = unit_name_from_dbus_path(s, &n);
3070 if (r < 0)
3071 return r;
3072
3073 /* Permit addressing units by invocation ID: if the passed bus path is suffixed by a 128bit ID then we use it
3074 * as invocation ID. */
3075 r = sd_id128_from_string(n, &invocation_id);
3076 if (r >= 0) {
3077 u = hashmap_get(m->units_by_invocation_id, &invocation_id);
3078 if (u) {
3079 *_u = u;
3080 return 0;
3081 }
3082
3083 return sd_bus_error_setf(e, BUS_ERROR_NO_UNIT_FOR_INVOCATION_ID,
3084 "No unit with the specified invocation ID " SD_ID128_FORMAT_STR " known.",
3085 SD_ID128_FORMAT_VAL(invocation_id));
3086 }
3087
3088 /* If this didn't work, we check if this is a unit name */
3089 if (!unit_name_is_valid(n, UNIT_NAME_PLAIN|UNIT_NAME_INSTANCE)) {
3090 _cleanup_free_ char *nn = NULL;
3091
3092 nn = cescape(n);
3093 return sd_bus_error_setf(e, SD_BUS_ERROR_INVALID_ARGS,
3094 "Unit name %s is neither a valid invocation ID nor unit name.", strnull(nn));
3095 }
3096
3097 r = manager_load_unit(m, n, NULL, e, &u);
3098 if (r < 0)
3099 return r;
3100
3101 *_u = u;
3102 return 0;
3103 }
3104
3105 int manager_get_job_from_dbus_path(Manager *m, const char *s, Job **_j) {
3106 const char *p;
3107 unsigned id;
3108 Job *j;
3109 int r;
3110
3111 assert(m);
3112 assert(s);
3113 assert(_j);
3114
3115 p = startswith(s, "/org/freedesktop/systemd1/job/");
3116 if (!p)
3117 return -EINVAL;
3118
3119 r = safe_atou(p, &id);
3120 if (r < 0)
3121 return r;
3122
3123 j = manager_get_job(m, id);
3124 if (!j)
3125 return -ENOENT;
3126
3127 *_j = j;
3128
3129 return 0;
3130 }
3131
3132 void manager_send_unit_audit(Manager *m, Unit *u, int type, bool success) {
3133
3134 #if HAVE_AUDIT
3135 _cleanup_free_ char *p = NULL;
3136 const char *msg;
3137 int audit_fd, r;
3138
3139 if (!MANAGER_IS_SYSTEM(m))
3140 return;
3141
3142 audit_fd = get_audit_fd();
3143 if (audit_fd < 0)
3144 return;
3145
3146 /* Don't generate audit events if the service was already
3147 * started and we're just deserializing */
3148 if (MANAGER_IS_RELOADING(m))
3149 return;
3150
3151 if (u->type != UNIT_SERVICE)
3152 return;
3153
3154 r = unit_name_to_prefix_and_instance(u->id, &p);
3155 if (r < 0) {
3156 log_error_errno(r, "Failed to extract prefix and instance of unit name: %m");
3157 return;
3158 }
3159
3160 msg = strjoina("unit=", p);
3161 if (audit_log_user_comm_message(audit_fd, type, msg, "systemd", NULL, NULL, NULL, success) < 0) {
3162 if (errno == EPERM)
3163 /* We aren't allowed to send audit messages?
3164 * Then let's not retry again. */
3165 close_audit_fd();
3166 else
3167 log_warning_errno(errno, "Failed to send audit message: %m");
3168 }
3169 #endif
3170
3171 }
3172
3173 void manager_send_unit_plymouth(Manager *m, Unit *u) {
3174 static const union sockaddr_union sa = PLYMOUTH_SOCKET;
3175 _cleanup_free_ char *message = NULL;
3176 _cleanup_close_ int fd = -1;
3177 int n = 0;
3178
3179 /* Don't generate plymouth events if the service was already
3180 * started and we're just deserializing */
3181 if (MANAGER_IS_RELOADING(m))
3182 return;
3183
3184 if (!MANAGER_IS_SYSTEM(m))
3185 return;
3186
3187 if (detect_container() > 0)
3188 return;
3189
3190 if (!IN_SET(u->type, UNIT_SERVICE, UNIT_MOUNT, UNIT_SWAP))
3191 return;
3192
3193 /* We set SOCK_NONBLOCK here so that we rather drop the
3194 * message then wait for plymouth */
3195 fd = socket(AF_UNIX, SOCK_STREAM|SOCK_CLOEXEC|SOCK_NONBLOCK, 0);
3196 if (fd < 0) {
3197 log_error_errno(errno, "socket() failed: %m");
3198 return;
3199 }
3200
3201 if (connect(fd, &sa.sa, SOCKADDR_UN_LEN(sa.un)) < 0) {
3202 if (!IN_SET(errno, EAGAIN, ENOENT) && !ERRNO_IS_DISCONNECT(errno))
3203 log_error_errno(errno, "connect() failed: %m");
3204 return;
3205 }
3206
3207 if (asprintf(&message, "U\002%c%s%n", (int) (strlen(u->id) + 1), u->id, &n) < 0)
3208 return (void) log_oom();
3209
3210 errno = 0;
3211 if (write(fd, message, n + 1) != n + 1)
3212 if (!IN_SET(errno, EAGAIN, ENOENT) && !ERRNO_IS_DISCONNECT(errno))
3213 log_error_errno(errno, "Failed to write Plymouth message: %m");
3214 }
3215
3216 usec_t manager_get_watchdog(Manager *m, WatchdogType t) {
3217 assert(m);
3218
3219 if (MANAGER_IS_USER(m))
3220 return USEC_INFINITY;
3221
3222 if (timestamp_is_set(m->watchdog_overridden[t]))
3223 return m->watchdog_overridden[t];
3224
3225 return m->watchdog[t];
3226 }
3227
3228 void manager_set_watchdog(Manager *m, WatchdogType t, usec_t timeout) {
3229
3230 assert(m);
3231
3232 if (MANAGER_IS_USER(m))
3233 return;
3234
3235 if (m->watchdog[t] == timeout)
3236 return;
3237
3238 if (t == WATCHDOG_RUNTIME) {
3239 if (!timestamp_is_set(m->watchdog_overridden[WATCHDOG_RUNTIME]))
3240 (void) watchdog_setup(timeout);
3241 } else if (t == WATCHDOG_PRETIMEOUT)
3242 if (m->watchdog_overridden[WATCHDOG_PRETIMEOUT] == USEC_INFINITY)
3243 (void) watchdog_setup_pretimeout(timeout);
3244
3245 m->watchdog[t] = timeout;
3246 }
3247
3248 void manager_override_watchdog(Manager *m, WatchdogType t, usec_t timeout) {
3249
3250 assert(m);
3251
3252 if (MANAGER_IS_USER(m))
3253 return;
3254
3255 if (m->watchdog_overridden[t] == timeout)
3256 return;
3257
3258 if (t == WATCHDOG_RUNTIME) {
3259 usec_t usec = timestamp_is_set(timeout) ? timeout : m->watchdog[t];
3260
3261 (void) watchdog_setup(usec);
3262 } else if (t == WATCHDOG_PRETIMEOUT)
3263 (void) watchdog_setup_pretimeout(timeout);
3264
3265 m->watchdog_overridden[t] = timeout;
3266 }
3267
3268 int manager_set_watchdog_pretimeout_governor(Manager *m, const char *governor) {
3269 _cleanup_free_ char *p = NULL;
3270 int r;
3271
3272 assert(m);
3273
3274 if (MANAGER_IS_USER(m))
3275 return 0;
3276
3277 if (streq_ptr(m->watchdog_pretimeout_governor, governor))
3278 return 0;
3279
3280 p = strdup(governor);
3281 if (!p)
3282 return -ENOMEM;
3283
3284 r = watchdog_setup_pretimeout_governor(governor);
3285 if (r < 0)
3286 return r;
3287
3288 return free_and_replace(m->watchdog_pretimeout_governor, p);
3289 }
3290
3291 int manager_override_watchdog_pretimeout_governor(Manager *m, const char *governor) {
3292 _cleanup_free_ char *p = NULL;
3293 int r;
3294
3295 assert(m);
3296
3297 if (MANAGER_IS_USER(m))
3298 return 0;
3299
3300 if (streq_ptr(m->watchdog_pretimeout_governor_overridden, governor))
3301 return 0;
3302
3303 p = strdup(governor);
3304 if (!p)
3305 return -ENOMEM;
3306
3307 r = watchdog_setup_pretimeout_governor(governor);
3308 if (r < 0)
3309 return r;
3310
3311 return free_and_replace(m->watchdog_pretimeout_governor_overridden, p);
3312 }
3313
3314 int manager_reload(Manager *m) {
3315 _unused_ _cleanup_(manager_reloading_stopp) Manager *reloading = NULL;
3316 _cleanup_fdset_free_ FDSet *fds = NULL;
3317 _cleanup_fclose_ FILE *f = NULL;
3318 int r;
3319
3320 assert(m);
3321
3322 r = manager_open_serialization(m, &f);
3323 if (r < 0)
3324 return log_error_errno(r, "Failed to create serialization file: %m");
3325
3326 fds = fdset_new();
3327 if (!fds)
3328 return log_oom();
3329
3330 /* We are officially in reload mode from here on. */
3331 reloading = manager_reloading_start(m);
3332
3333 r = manager_serialize(m, f, fds, false);
3334 if (r < 0)
3335 return r;
3336
3337 if (fseeko(f, 0, SEEK_SET) < 0)
3338 return log_error_errno(errno, "Failed to seek to beginning of serialization: %m");
3339
3340 /* 💀 This is the point of no return, from here on there is no way back. 💀 */
3341 reloading = NULL;
3342
3343 bus_manager_send_reloading(m, true);
3344
3345 /* Start by flushing out all jobs and units, all generated units, all runtime environments, all dynamic users
3346 * and everything else that is worth flushing out. We'll get it all back from the serialization — if we need
3347 * it. */
3348
3349 manager_clear_jobs_and_units(m);
3350 lookup_paths_flush_generator(&m->lookup_paths);
3351 lookup_paths_free(&m->lookup_paths);
3352 exec_runtime_vacuum(m);
3353 dynamic_user_vacuum(m, false);
3354 m->uid_refs = hashmap_free(m->uid_refs);
3355 m->gid_refs = hashmap_free(m->gid_refs);
3356
3357 r = lookup_paths_init(&m->lookup_paths, m->unit_file_scope, 0, NULL);
3358 if (r < 0)
3359 log_warning_errno(r, "Failed to initialize path lookup table, ignoring: %m");
3360
3361 (void) manager_run_environment_generators(m);
3362 (void) manager_run_generators(m);
3363
3364 lookup_paths_log(&m->lookup_paths);
3365
3366 /* We flushed out generated files, for which we don't watch mtime, so we should flush the old map. */
3367 manager_free_unit_name_maps(m);
3368
3369 /* First, enumerate what we can from kernel and suchlike */
3370 manager_enumerate_perpetual(m);
3371 manager_enumerate(m);
3372
3373 /* Second, deserialize our stored data */
3374 r = manager_deserialize(m, f, fds);
3375 if (r < 0)
3376 log_warning_errno(r, "Deserialization failed, proceeding anyway: %m");
3377
3378 /* We don't need the serialization anymore */
3379 f = safe_fclose(f);
3380
3381 /* Re-register notify_fd as event source, and set up other sockets/communication channels we might need */
3382 (void) manager_setup_notify(m);
3383 (void) manager_setup_cgroups_agent(m);
3384 (void) manager_setup_user_lookup_fd(m);
3385
3386 /* Third, fire things up! */
3387 manager_coldplug(m);
3388
3389 /* Clean up runtime objects no longer referenced */
3390 manager_vacuum(m);
3391
3392 /* Clean up deserialized tracked clients */
3393 m->deserialized_subscribed = strv_free(m->deserialized_subscribed);
3394
3395 /* Consider the reload process complete now. */
3396 assert(m->n_reloading > 0);
3397 m->n_reloading--;
3398
3399 /* On manager reloading, device tag data should exists, thus, we should honor the results of device
3400 * enumeration. The flag should be always set correctly by the serialized data, but it may fail. So,
3401 * let's always set the flag here for safety. */
3402 m->honor_device_enumeration = true;
3403
3404 manager_ready(m);
3405
3406 m->send_reloading_done = true;
3407 return 0;
3408 }
3409
3410 void manager_reset_failed(Manager *m) {
3411 Unit *u;
3412
3413 assert(m);
3414
3415 HASHMAP_FOREACH(u, m->units)
3416 unit_reset_failed(u);
3417 }
3418
3419 bool manager_unit_inactive_or_pending(Manager *m, const char *name) {
3420 Unit *u;
3421
3422 assert(m);
3423 assert(name);
3424
3425 /* Returns true if the unit is inactive or going down */
3426 u = manager_get_unit(m, name);
3427 if (!u)
3428 return true;
3429
3430 return unit_inactive_or_pending(u);
3431 }
3432
3433 static void log_taint_string(Manager *m) {
3434 _cleanup_free_ char *taint = NULL;
3435
3436 assert(m);
3437
3438 if (MANAGER_IS_USER(m) || m->taint_logged)
3439 return;
3440
3441 m->taint_logged = true; /* only check for taint once */
3442
3443 taint = manager_taint_string(m);
3444 if (isempty(taint))
3445 return;
3446
3447 log_struct(LOG_NOTICE,
3448 LOG_MESSAGE("System is tainted: %s", taint),
3449 "TAINT=%s", taint,
3450 "MESSAGE_ID=" SD_MESSAGE_TAINTED_STR);
3451 }
3452
3453 static void manager_notify_finished(Manager *m) {
3454 usec_t firmware_usec, loader_usec, kernel_usec, initrd_usec, userspace_usec, total_usec;
3455
3456 if (MANAGER_IS_TEST_RUN(m))
3457 return;
3458
3459 if (MANAGER_IS_SYSTEM(m) && detect_container() <= 0) {
3460 char buf[FORMAT_TIMESPAN_MAX + STRLEN(" (firmware) + ") + FORMAT_TIMESPAN_MAX + STRLEN(" (loader) + ")]
3461 = {};
3462 char *p = buf;
3463 size_t size = sizeof buf;
3464
3465 /* Note that MANAGER_TIMESTAMP_KERNEL's monotonic value is always at 0, and
3466 * MANAGER_TIMESTAMP_FIRMWARE's and MANAGER_TIMESTAMP_LOADER's monotonic value should be considered
3467 * negative values. */
3468
3469 firmware_usec = m->timestamps[MANAGER_TIMESTAMP_FIRMWARE].monotonic - m->timestamps[MANAGER_TIMESTAMP_LOADER].monotonic;
3470 loader_usec = m->timestamps[MANAGER_TIMESTAMP_LOADER].monotonic - m->timestamps[MANAGER_TIMESTAMP_KERNEL].monotonic;
3471 userspace_usec = m->timestamps[MANAGER_TIMESTAMP_FINISH].monotonic - m->timestamps[MANAGER_TIMESTAMP_USERSPACE].monotonic;
3472 total_usec = m->timestamps[MANAGER_TIMESTAMP_FIRMWARE].monotonic + m->timestamps[MANAGER_TIMESTAMP_FINISH].monotonic;
3473
3474 if (firmware_usec > 0)
3475 size = strpcpyf(&p, size, "%s (firmware) + ", FORMAT_TIMESPAN(firmware_usec, USEC_PER_MSEC));
3476 if (loader_usec > 0)
3477 size = strpcpyf(&p, size, "%s (loader) + ", FORMAT_TIMESPAN(loader_usec, USEC_PER_MSEC));
3478
3479 if (dual_timestamp_is_set(&m->timestamps[MANAGER_TIMESTAMP_INITRD])) {
3480
3481 /* The initrd case on bare-metal */
3482 kernel_usec = m->timestamps[MANAGER_TIMESTAMP_INITRD].monotonic - m->timestamps[MANAGER_TIMESTAMP_KERNEL].monotonic;
3483 initrd_usec = m->timestamps[MANAGER_TIMESTAMP_USERSPACE].monotonic - m->timestamps[MANAGER_TIMESTAMP_INITRD].monotonic;
3484
3485 log_struct(LOG_INFO,
3486 "MESSAGE_ID=" SD_MESSAGE_STARTUP_FINISHED_STR,
3487 "KERNEL_USEC="USEC_FMT, kernel_usec,
3488 "INITRD_USEC="USEC_FMT, initrd_usec,
3489 "USERSPACE_USEC="USEC_FMT, userspace_usec,
3490 LOG_MESSAGE("Startup finished in %s%s (kernel) + %s (initrd) + %s (userspace) = %s.",
3491 buf,
3492 FORMAT_TIMESPAN(kernel_usec, USEC_PER_MSEC),
3493 FORMAT_TIMESPAN(initrd_usec, USEC_PER_MSEC),
3494 FORMAT_TIMESPAN(userspace_usec, USEC_PER_MSEC),
3495 FORMAT_TIMESPAN(total_usec, USEC_PER_MSEC)));
3496 } else {
3497 /* The initrd-less case on bare-metal */
3498
3499 kernel_usec = m->timestamps[MANAGER_TIMESTAMP_USERSPACE].monotonic - m->timestamps[MANAGER_TIMESTAMP_KERNEL].monotonic;
3500 initrd_usec = 0;
3501
3502 log_struct(LOG_INFO,
3503 "MESSAGE_ID=" SD_MESSAGE_STARTUP_FINISHED_STR,
3504 "KERNEL_USEC="USEC_FMT, kernel_usec,
3505 "USERSPACE_USEC="USEC_FMT, userspace_usec,
3506 LOG_MESSAGE("Startup finished in %s%s (kernel) + %s (userspace) = %s.",
3507 buf,
3508 FORMAT_TIMESPAN(kernel_usec, USEC_PER_MSEC),
3509 FORMAT_TIMESPAN(userspace_usec, USEC_PER_MSEC),
3510 FORMAT_TIMESPAN(total_usec, USEC_PER_MSEC)));
3511 }
3512 } else {
3513 /* The container and --user case */
3514 firmware_usec = loader_usec = initrd_usec = kernel_usec = 0;
3515 total_usec = userspace_usec = m->timestamps[MANAGER_TIMESTAMP_FINISH].monotonic - m->timestamps[MANAGER_TIMESTAMP_USERSPACE].monotonic;
3516
3517 log_struct(LOG_INFO,
3518 "MESSAGE_ID=" SD_MESSAGE_USER_STARTUP_FINISHED_STR,
3519 "USERSPACE_USEC="USEC_FMT, userspace_usec,
3520 LOG_MESSAGE("Startup finished in %s.",
3521 FORMAT_TIMESPAN(total_usec, USEC_PER_MSEC)));
3522 }
3523
3524 bus_manager_send_finished(m, firmware_usec, loader_usec, kernel_usec, initrd_usec, userspace_usec, total_usec);
3525
3526 log_taint_string(m);
3527 }
3528
3529 static void user_manager_send_ready(Manager *m) {
3530 int r;
3531
3532 assert(m);
3533
3534 /* We send READY=1 on reaching basic.target only when running in --user mode. */
3535 if (!MANAGER_IS_USER(m) || m->ready_sent)
3536 return;
3537
3538 r = sd_notify(false,
3539 "READY=1\n"
3540 "STATUS=Reached " SPECIAL_BASIC_TARGET ".");
3541 if (r < 0)
3542 log_warning_errno(r, "Failed to send readiness notification, ignoring: %m");
3543
3544 m->ready_sent = true;
3545 m->status_ready = false;
3546 }
3547
3548 static void manager_send_ready(Manager *m) {
3549 int r;
3550
3551 if (m->ready_sent && m->status_ready)
3552 /* Skip the notification if nothing changed. */
3553 return;
3554
3555 r = sd_notify(false,
3556 "READY=1\n"
3557 "STATUS=Ready.");
3558 if (r < 0)
3559 log_full_errno(m->ready_sent ? LOG_DEBUG : LOG_WARNING, r,
3560 "Failed to send readiness notification, ignoring: %m");
3561
3562 m->ready_sent = m->status_ready = true;
3563 }
3564
3565 static void manager_check_basic_target(Manager *m) {
3566 Unit *u;
3567
3568 assert(m);
3569
3570 /* Small shortcut */
3571 if (m->ready_sent && m->taint_logged)
3572 return;
3573
3574 u = manager_get_unit(m, SPECIAL_BASIC_TARGET);
3575 if (!u || !UNIT_IS_ACTIVE_OR_RELOADING(unit_active_state(u)))
3576 return;
3577
3578 /* For user managers, send out READY=1 as soon as we reach basic.target */
3579 user_manager_send_ready(m);
3580
3581 /* Log the taint string as soon as we reach basic.target */
3582 log_taint_string(m);
3583 }
3584
3585 void manager_check_finished(Manager *m) {
3586 assert(m);
3587
3588 if (MANAGER_IS_RELOADING(m))
3589 return;
3590
3591 /* Verify that we have entered the event loop already, and not left it again. */
3592 if (!MANAGER_IS_RUNNING(m))
3593 return;
3594
3595 manager_check_basic_target(m);
3596
3597 if (hashmap_size(m->jobs) > 0) {
3598 if (m->jobs_in_progress_event_source)
3599 /* Ignore any failure, this is only for feedback */
3600 (void) sd_event_source_set_time(m->jobs_in_progress_event_source,
3601 manager_watch_jobs_next_time(m));
3602 return;
3603 }
3604
3605 /* The jobs hashmap tends to grow a lot during boot, and then it's not reused until shutdown. Let's
3606 kill the hashmap if it is relatively large. */
3607 if (hashmap_buckets(m->jobs) > hashmap_size(m->units) / 10)
3608 m->jobs = hashmap_free(m->jobs);
3609
3610 manager_send_ready(m);
3611
3612 /* Notify Type=idle units that we are done now */
3613 manager_close_idle_pipe(m);
3614
3615 if (MANAGER_IS_FINISHED(m))
3616 return;
3617
3618 manager_flip_auto_status(m, false, "boot finished");
3619
3620 /* Turn off confirm spawn now */
3621 m->confirm_spawn = NULL;
3622
3623 /* No need to update ask password status when we're going non-interactive */
3624 manager_close_ask_password(m);
3625
3626 /* This is no longer the first boot */
3627 manager_set_first_boot(m, false);
3628
3629 dual_timestamp_get(m->timestamps + MANAGER_TIMESTAMP_FINISH);
3630
3631 manager_notify_finished(m);
3632
3633 manager_invalidate_startup_units(m);
3634 }
3635
3636 static bool generator_path_any(const char* const* paths) {
3637 bool found = false;
3638
3639 /* Optimize by skipping the whole process by not creating output directories
3640 * if no generators are found. */
3641 STRV_FOREACH(path, (char**) paths)
3642 if (access(*path, F_OK) == 0)
3643 found = true;
3644 else if (errno != ENOENT)
3645 log_warning_errno(errno, "Failed to open generator directory %s: %m", *path);
3646
3647 return found;
3648 }
3649
3650 static int manager_run_environment_generators(Manager *m) {
3651 char **tmp = NULL; /* this is only used in the forked process, no cleanup here */
3652 _cleanup_strv_free_ char **paths = NULL;
3653 void* args[] = {
3654 [STDOUT_GENERATE] = &tmp,
3655 [STDOUT_COLLECT] = &tmp,
3656 [STDOUT_CONSUME] = &m->transient_environment,
3657 };
3658 int r;
3659
3660 if (MANAGER_IS_TEST_RUN(m) && !(m->test_run_flags & MANAGER_TEST_RUN_ENV_GENERATORS))
3661 return 0;
3662
3663 paths = env_generator_binary_paths(MANAGER_IS_SYSTEM(m));
3664 if (!paths)
3665 return log_oom();
3666
3667 if (!generator_path_any((const char* const*) paths))
3668 return 0;
3669
3670 RUN_WITH_UMASK(0022)
3671 r = execute_directories((const char* const*) paths, DEFAULT_TIMEOUT_USEC, gather_environment,
3672 args, NULL, m->transient_environment,
3673 EXEC_DIR_PARALLEL | EXEC_DIR_IGNORE_ERRORS | EXEC_DIR_SET_SYSTEMD_EXEC_PID);
3674 return r;
3675 }
3676
3677 static int manager_run_generators(Manager *m) {
3678 _cleanup_strv_free_ char **paths = NULL;
3679 const char *argv[5];
3680 int r;
3681
3682 assert(m);
3683
3684 if (MANAGER_IS_TEST_RUN(m) && !(m->test_run_flags & MANAGER_TEST_RUN_GENERATORS))
3685 return 0;
3686
3687 paths = generator_binary_paths(m->unit_file_scope);
3688 if (!paths)
3689 return log_oom();
3690
3691 if (!generator_path_any((const char* const*) paths))
3692 return 0;
3693
3694 r = lookup_paths_mkdir_generator(&m->lookup_paths);
3695 if (r < 0) {
3696 log_error_errno(r, "Failed to create generator directories: %m");
3697 goto finish;
3698 }
3699
3700 argv[0] = NULL; /* Leave this empty, execute_directory() will fill something in */
3701 argv[1] = m->lookup_paths.generator;
3702 argv[2] = m->lookup_paths.generator_early;
3703 argv[3] = m->lookup_paths.generator_late;
3704 argv[4] = NULL;
3705
3706 RUN_WITH_UMASK(0022)
3707 (void) execute_directories((const char* const*) paths, DEFAULT_TIMEOUT_USEC, NULL, NULL,
3708 (char**) argv, m->transient_environment,
3709 EXEC_DIR_PARALLEL | EXEC_DIR_IGNORE_ERRORS | EXEC_DIR_SET_SYSTEMD_EXEC_PID);
3710
3711 r = 0;
3712
3713 finish:
3714 lookup_paths_trim_generator(&m->lookup_paths);
3715 return r;
3716 }
3717
3718 int manager_transient_environment_add(Manager *m, char **plus) {
3719 char **a;
3720
3721 assert(m);
3722
3723 if (strv_isempty(plus))
3724 return 0;
3725
3726 a = strv_env_merge(m->transient_environment, plus);
3727 if (!a)
3728 return log_oom();
3729
3730 sanitize_environment(a);
3731
3732 return strv_free_and_replace(m->transient_environment, a);
3733 }
3734
3735 int manager_client_environment_modify(
3736 Manager *m,
3737 char **minus,
3738 char **plus) {
3739
3740 char **a = NULL, **b = NULL, **l;
3741
3742 assert(m);
3743
3744 if (strv_isempty(minus) && strv_isempty(plus))
3745 return 0;
3746
3747 l = m->client_environment;
3748
3749 if (!strv_isempty(minus)) {
3750 a = strv_env_delete(l, 1, minus);
3751 if (!a)
3752 return -ENOMEM;
3753
3754 l = a;
3755 }
3756
3757 if (!strv_isempty(plus)) {
3758 b = strv_env_merge(l, plus);
3759 if (!b) {
3760 strv_free(a);
3761 return -ENOMEM;
3762 }
3763
3764 l = b;
3765 }
3766
3767 if (m->client_environment != l)
3768 strv_free(m->client_environment);
3769
3770 if (a != l)
3771 strv_free(a);
3772 if (b != l)
3773 strv_free(b);
3774
3775 m->client_environment = sanitize_environment(l);
3776 return 0;
3777 }
3778
3779 int manager_get_effective_environment(Manager *m, char ***ret) {
3780 char **l;
3781
3782 assert(m);
3783 assert(ret);
3784
3785 l = strv_env_merge(m->transient_environment, m->client_environment);
3786 if (!l)
3787 return -ENOMEM;
3788
3789 *ret = l;
3790 return 0;
3791 }
3792
3793 int manager_set_default_rlimits(Manager *m, struct rlimit **default_rlimit) {
3794 assert(m);
3795
3796 for (unsigned i = 0; i < _RLIMIT_MAX; i++) {
3797 m->rlimit[i] = mfree(m->rlimit[i]);
3798
3799 if (!default_rlimit[i])
3800 continue;
3801
3802 m->rlimit[i] = newdup(struct rlimit, default_rlimit[i], 1);
3803 if (!m->rlimit[i])
3804 return log_oom();
3805 }
3806
3807 return 0;
3808 }
3809
3810 void manager_recheck_dbus(Manager *m) {
3811 assert(m);
3812
3813 /* Connects to the bus if the dbus service and socket are running. If we are running in user mode this is all
3814 * it does. In system mode we'll also connect to the system bus (which will most likely just reuse the
3815 * connection of the API bus). That's because the system bus after all runs as service of the system instance,
3816 * while in the user instance we can assume it's already there. */
3817
3818 if (MANAGER_IS_RELOADING(m))
3819 return; /* don't check while we are reloading… */
3820
3821 if (manager_dbus_is_running(m, false)) {
3822 (void) bus_init_api(m);
3823
3824 if (MANAGER_IS_SYSTEM(m))
3825 (void) bus_init_system(m);
3826 } else {
3827 (void) bus_done_api(m);
3828
3829 if (MANAGER_IS_SYSTEM(m))
3830 (void) bus_done_system(m);
3831 }
3832 }
3833
3834 static bool manager_journal_is_running(Manager *m) {
3835 Unit *u;
3836
3837 assert(m);
3838
3839 if (MANAGER_IS_TEST_RUN(m))
3840 return false;
3841
3842 /* If we are the user manager we can safely assume that the journal is up */
3843 if (!MANAGER_IS_SYSTEM(m))
3844 return true;
3845
3846 /* Check that the socket is not only up, but in RUNNING state */
3847 u = manager_get_unit(m, SPECIAL_JOURNALD_SOCKET);
3848 if (!u)
3849 return false;
3850 if (SOCKET(u)->state != SOCKET_RUNNING)
3851 return false;
3852
3853 /* Similar, check if the daemon itself is fully up, too */
3854 u = manager_get_unit(m, SPECIAL_JOURNALD_SERVICE);
3855 if (!u)
3856 return false;
3857 if (!IN_SET(SERVICE(u)->state, SERVICE_RELOAD, SERVICE_RUNNING))
3858 return false;
3859
3860 return true;
3861 }
3862
3863 void disable_printk_ratelimit(void) {
3864 /* Disable kernel's printk ratelimit.
3865 *
3866 * Logging to /dev/kmsg is most useful during early boot and shutdown, where normal logging
3867 * mechanisms are not available. The semantics of this sysctl are such that any kernel command-line
3868 * setting takes precedence. */
3869 int r;
3870
3871 r = sysctl_write("kernel/printk_devkmsg", "on");
3872 if (r < 0)
3873 log_debug_errno(r, "Failed to set sysctl kernel.printk_devkmsg=on: %m");
3874 }
3875
3876 void manager_recheck_journal(Manager *m) {
3877
3878 assert(m);
3879
3880 /* Don't bother with this unless we are in the special situation of being PID 1 */
3881 if (getpid_cached() != 1)
3882 return;
3883
3884 /* Don't check this while we are reloading, things might still change */
3885 if (MANAGER_IS_RELOADING(m))
3886 return;
3887
3888 /* The journal is fully and entirely up? If so, let's permit logging to it, if that's configured. If the
3889 * journal is down, don't ever log to it, otherwise we might end up deadlocking ourselves as we might trigger
3890 * an activation ourselves we can't fulfill. */
3891 log_set_prohibit_ipc(!manager_journal_is_running(m));
3892 log_open();
3893 }
3894
3895 static ShowStatus manager_get_show_status(Manager *m) {
3896 assert(m);
3897
3898 if (MANAGER_IS_USER(m))
3899 return _SHOW_STATUS_INVALID;
3900
3901 if (m->show_status_overridden != _SHOW_STATUS_INVALID)
3902 return m->show_status_overridden;
3903
3904 return m->show_status;
3905 }
3906
3907 bool manager_get_show_status_on(Manager *m) {
3908 assert(m);
3909
3910 return show_status_on(manager_get_show_status(m));
3911 }
3912
3913 static void set_show_status_marker(bool b) {
3914 if (b)
3915 (void) touch("/run/systemd/show-status");
3916 else
3917 (void) unlink("/run/systemd/show-status");
3918 }
3919
3920 void manager_set_show_status(Manager *m, ShowStatus mode, const char *reason) {
3921 assert(m);
3922 assert(reason);
3923 assert(mode >= 0 && mode < _SHOW_STATUS_MAX);
3924
3925 if (MANAGER_IS_USER(m))
3926 return;
3927
3928 if (mode == m->show_status)
3929 return;
3930
3931 if (m->show_status_overridden == _SHOW_STATUS_INVALID) {
3932 bool enabled;
3933
3934 enabled = show_status_on(mode);
3935 log_debug("%s (%s) showing of status (%s).",
3936 enabled ? "Enabling" : "Disabling",
3937 strna(show_status_to_string(mode)),
3938 reason);
3939
3940 set_show_status_marker(enabled);
3941 }
3942
3943 m->show_status = mode;
3944 }
3945
3946 void manager_override_show_status(Manager *m, ShowStatus mode, const char *reason) {
3947 assert(m);
3948 assert(mode < _SHOW_STATUS_MAX);
3949
3950 if (MANAGER_IS_USER(m))
3951 return;
3952
3953 if (mode == m->show_status_overridden)
3954 return;
3955
3956 m->show_status_overridden = mode;
3957
3958 if (mode == _SHOW_STATUS_INVALID)
3959 mode = m->show_status;
3960
3961 log_debug("%s (%s) showing of status (%s).",
3962 m->show_status_overridden != _SHOW_STATUS_INVALID ? "Overriding" : "Restoring",
3963 strna(show_status_to_string(mode)),
3964 reason);
3965
3966 set_show_status_marker(show_status_on(mode));
3967 }
3968
3969 const char *manager_get_confirm_spawn(Manager *m) {
3970 static int last_errno = 0;
3971 struct stat st;
3972 int r;
3973
3974 assert(m);
3975
3976 /* Here's the deal: we want to test the validity of the console but don't want
3977 * PID1 to go through the whole console process which might block. But we also
3978 * want to warn the user only once if something is wrong with the console so we
3979 * cannot do the sanity checks after spawning our children. So here we simply do
3980 * really basic tests to hopefully trap common errors.
3981 *
3982 * If the console suddenly disappear at the time our children will really it
3983 * then they will simply fail to acquire it and a positive answer will be
3984 * assumed. New children will fall back to /dev/console though.
3985 *
3986 * Note: TTYs are devices that can come and go any time, and frequently aren't
3987 * available yet during early boot (consider a USB rs232 dongle...). If for any
3988 * reason the configured console is not ready, we fall back to the default
3989 * console. */
3990
3991 if (!m->confirm_spawn || path_equal(m->confirm_spawn, "/dev/console"))
3992 return m->confirm_spawn;
3993
3994 if (stat(m->confirm_spawn, &st) < 0) {
3995 r = -errno;
3996 goto fail;
3997 }
3998
3999 if (!S_ISCHR(st.st_mode)) {
4000 r = -ENOTTY;
4001 goto fail;
4002 }
4003
4004 last_errno = 0;
4005 return m->confirm_spawn;
4006
4007 fail:
4008 if (last_errno != r)
4009 last_errno = log_warning_errno(r, "Failed to open %s, using default console: %m", m->confirm_spawn);
4010
4011 return "/dev/console";
4012 }
4013
4014 void manager_set_first_boot(Manager *m, bool b) {
4015 assert(m);
4016
4017 if (!MANAGER_IS_SYSTEM(m))
4018 return;
4019
4020 if (m->first_boot != (int) b) {
4021 if (b)
4022 (void) touch("/run/systemd/first-boot");
4023 else
4024 (void) unlink("/run/systemd/first-boot");
4025 }
4026
4027 m->first_boot = b;
4028 }
4029
4030 void manager_disable_confirm_spawn(void) {
4031 (void) touch("/run/systemd/confirm_spawn_disabled");
4032 }
4033
4034 bool manager_is_confirm_spawn_disabled(Manager *m) {
4035 if (!m->confirm_spawn)
4036 return true;
4037
4038 return access("/run/systemd/confirm_spawn_disabled", F_OK) >= 0;
4039 }
4040
4041 static bool manager_should_show_status(Manager *m, StatusType type) {
4042 assert(m);
4043
4044 if (!MANAGER_IS_SYSTEM(m))
4045 return false;
4046
4047 if (m->no_console_output)
4048 return false;
4049
4050 if (!IN_SET(manager_state(m), MANAGER_INITIALIZING, MANAGER_STARTING, MANAGER_STOPPING))
4051 return false;
4052
4053 /* If we cannot find out the status properly, just proceed. */
4054 if (type != STATUS_TYPE_EMERGENCY && manager_check_ask_password(m) > 0)
4055 return false;
4056
4057 if (type == STATUS_TYPE_NOTICE && m->show_status != SHOW_STATUS_NO)
4058 return true;
4059
4060 return manager_get_show_status_on(m);
4061 }
4062
4063 void manager_status_printf(Manager *m, StatusType type, const char *status, const char *format, ...) {
4064 va_list ap;
4065
4066 /* If m is NULL, assume we're after shutdown and let the messages through. */
4067
4068 if (m && !manager_should_show_status(m, type))
4069 return;
4070
4071 /* XXX We should totally drop the check for ephemeral here
4072 * and thus effectively make 'Type=idle' pointless. */
4073 if (type == STATUS_TYPE_EPHEMERAL && m && m->n_on_console > 0)
4074 return;
4075
4076 va_start(ap, format);
4077 status_vprintf(status, SHOW_STATUS_ELLIPSIZE|(type == STATUS_TYPE_EPHEMERAL ? SHOW_STATUS_EPHEMERAL : 0), format, ap);
4078 va_end(ap);
4079 }
4080
4081 Set* manager_get_units_requiring_mounts_for(Manager *m, const char *path) {
4082 assert(m);
4083 assert(path);
4084
4085 if (path_equal(path, "/"))
4086 path = "";
4087
4088 return hashmap_get(m->units_requiring_mounts_for, path);
4089 }
4090
4091 int manager_update_failed_units(Manager *m, Unit *u, bool failed) {
4092 unsigned size;
4093 int r;
4094
4095 assert(m);
4096 assert(u->manager == m);
4097
4098 size = set_size(m->failed_units);
4099
4100 if (failed) {
4101 r = set_ensure_put(&m->failed_units, NULL, u);
4102 if (r < 0)
4103 return log_oom();
4104 } else
4105 (void) set_remove(m->failed_units, u);
4106
4107 if (set_size(m->failed_units) != size)
4108 bus_manager_send_change_signal(m);
4109
4110 return 0;
4111 }
4112
4113 ManagerState manager_state(Manager *m) {
4114 Unit *u;
4115
4116 assert(m);
4117
4118 /* Is the special shutdown target active or queued? If so, we are in shutdown state */
4119 u = manager_get_unit(m, SPECIAL_SHUTDOWN_TARGET);
4120 if (u && unit_active_or_pending(u))
4121 return MANAGER_STOPPING;
4122
4123 /* Did we ever finish booting? If not then we are still starting up */
4124 if (!MANAGER_IS_FINISHED(m)) {
4125
4126 u = manager_get_unit(m, SPECIAL_BASIC_TARGET);
4127 if (!u || !UNIT_IS_ACTIVE_OR_RELOADING(unit_active_state(u)))
4128 return MANAGER_INITIALIZING;
4129
4130 return MANAGER_STARTING;
4131 }
4132
4133 if (MANAGER_IS_SYSTEM(m)) {
4134 /* Are the rescue or emergency targets active or queued? If so we are in maintenance state */
4135 u = manager_get_unit(m, SPECIAL_RESCUE_TARGET);
4136 if (u && unit_active_or_pending(u))
4137 return MANAGER_MAINTENANCE;
4138
4139 u = manager_get_unit(m, SPECIAL_EMERGENCY_TARGET);
4140 if (u && unit_active_or_pending(u))
4141 return MANAGER_MAINTENANCE;
4142 }
4143
4144 /* Are there any failed units? If so, we are in degraded mode */
4145 if (set_size(m->failed_units) > 0)
4146 return MANAGER_DEGRADED;
4147
4148 return MANAGER_RUNNING;
4149 }
4150
4151 static void manager_unref_uid_internal(
4152 Hashmap *uid_refs,
4153 uid_t uid,
4154 bool destroy_now,
4155 int (*_clean_ipc)(uid_t uid)) {
4156
4157 uint32_t c, n;
4158
4159 assert(uid_is_valid(uid));
4160 assert(_clean_ipc);
4161
4162 /* A generic implementation, covering both manager_unref_uid() and manager_unref_gid(), under the assumption
4163 * that uid_t and gid_t are actually defined the same way, with the same validity rules.
4164 *
4165 * We store a hashmap where the key is the UID/GID and the value is a 32bit reference counter, whose highest
4166 * bit is used as flag for marking UIDs/GIDs whose IPC objects to remove when the last reference to the UID/GID
4167 * is dropped. The flag is set to on, once at least one reference from a unit where RemoveIPC= is set is added
4168 * on a UID/GID. It is reset when the UID's/GID's reference counter drops to 0 again. */
4169
4170 assert_cc(sizeof(uid_t) == sizeof(gid_t));
4171 assert_cc(UID_INVALID == (uid_t) GID_INVALID);
4172
4173 if (uid == 0) /* We don't keep track of root, and will never destroy it */
4174 return;
4175
4176 c = PTR_TO_UINT32(hashmap_get(uid_refs, UID_TO_PTR(uid)));
4177
4178 n = c & ~DESTROY_IPC_FLAG;
4179 assert(n > 0);
4180 n--;
4181
4182 if (destroy_now && n == 0) {
4183 hashmap_remove(uid_refs, UID_TO_PTR(uid));
4184
4185 if (c & DESTROY_IPC_FLAG) {
4186 log_debug("%s " UID_FMT " is no longer referenced, cleaning up its IPC.",
4187 _clean_ipc == clean_ipc_by_uid ? "UID" : "GID",
4188 uid);
4189 (void) _clean_ipc(uid);
4190 }
4191 } else {
4192 c = n | (c & DESTROY_IPC_FLAG);
4193 assert_se(hashmap_update(uid_refs, UID_TO_PTR(uid), UINT32_TO_PTR(c)) >= 0);
4194 }
4195 }
4196
4197 void manager_unref_uid(Manager *m, uid_t uid, bool destroy_now) {
4198 manager_unref_uid_internal(m->uid_refs, uid, destroy_now, clean_ipc_by_uid);
4199 }
4200
4201 void manager_unref_gid(Manager *m, gid_t gid, bool destroy_now) {
4202 manager_unref_uid_internal(m->gid_refs, (uid_t) gid, destroy_now, clean_ipc_by_gid);
4203 }
4204
4205 static int manager_ref_uid_internal(
4206 Hashmap **uid_refs,
4207 uid_t uid,
4208 bool clean_ipc) {
4209
4210 uint32_t c, n;
4211 int r;
4212
4213 assert(uid_refs);
4214 assert(uid_is_valid(uid));
4215
4216 /* A generic implementation, covering both manager_ref_uid() and manager_ref_gid(), under the assumption
4217 * that uid_t and gid_t are actually defined the same way, with the same validity rules. */
4218
4219 assert_cc(sizeof(uid_t) == sizeof(gid_t));
4220 assert_cc(UID_INVALID == (uid_t) GID_INVALID);
4221
4222 if (uid == 0) /* We don't keep track of root, and will never destroy it */
4223 return 0;
4224
4225 r = hashmap_ensure_allocated(uid_refs, &trivial_hash_ops);
4226 if (r < 0)
4227 return r;
4228
4229 c = PTR_TO_UINT32(hashmap_get(*uid_refs, UID_TO_PTR(uid)));
4230
4231 n = c & ~DESTROY_IPC_FLAG;
4232 n++;
4233
4234 if (n & DESTROY_IPC_FLAG) /* check for overflow */
4235 return -EOVERFLOW;
4236
4237 c = n | (c & DESTROY_IPC_FLAG) | (clean_ipc ? DESTROY_IPC_FLAG : 0);
4238
4239 return hashmap_replace(*uid_refs, UID_TO_PTR(uid), UINT32_TO_PTR(c));
4240 }
4241
4242 int manager_ref_uid(Manager *m, uid_t uid, bool clean_ipc) {
4243 return manager_ref_uid_internal(&m->uid_refs, uid, clean_ipc);
4244 }
4245
4246 int manager_ref_gid(Manager *m, gid_t gid, bool clean_ipc) {
4247 return manager_ref_uid_internal(&m->gid_refs, (uid_t) gid, clean_ipc);
4248 }
4249
4250 static void manager_vacuum_uid_refs_internal(
4251 Hashmap *uid_refs,
4252 int (*_clean_ipc)(uid_t uid)) {
4253
4254 void *p, *k;
4255
4256 assert(_clean_ipc);
4257
4258 HASHMAP_FOREACH_KEY(p, k, uid_refs) {
4259 uint32_t c, n;
4260 uid_t uid;
4261
4262 uid = PTR_TO_UID(k);
4263 c = PTR_TO_UINT32(p);
4264
4265 n = c & ~DESTROY_IPC_FLAG;
4266 if (n > 0)
4267 continue;
4268
4269 if (c & DESTROY_IPC_FLAG) {
4270 log_debug("Found unreferenced %s " UID_FMT " after reload/reexec. Cleaning up.",
4271 _clean_ipc == clean_ipc_by_uid ? "UID" : "GID",
4272 uid);
4273 (void) _clean_ipc(uid);
4274 }
4275
4276 assert_se(hashmap_remove(uid_refs, k) == p);
4277 }
4278 }
4279
4280 static void manager_vacuum_uid_refs(Manager *m) {
4281 manager_vacuum_uid_refs_internal(m->uid_refs, clean_ipc_by_uid);
4282 }
4283
4284 static void manager_vacuum_gid_refs(Manager *m) {
4285 manager_vacuum_uid_refs_internal(m->gid_refs, clean_ipc_by_gid);
4286 }
4287
4288 static void manager_vacuum(Manager *m) {
4289 assert(m);
4290
4291 /* Release any dynamic users no longer referenced */
4292 dynamic_user_vacuum(m, true);
4293
4294 /* Release any references to UIDs/GIDs no longer referenced, and destroy any IPC owned by them */
4295 manager_vacuum_uid_refs(m);
4296 manager_vacuum_gid_refs(m);
4297
4298 /* Release any runtimes no longer referenced */
4299 exec_runtime_vacuum(m);
4300 }
4301
4302 int manager_dispatch_user_lookup_fd(sd_event_source *source, int fd, uint32_t revents, void *userdata) {
4303 struct buffer {
4304 uid_t uid;
4305 gid_t gid;
4306 char unit_name[UNIT_NAME_MAX+1];
4307 } _packed_ buffer;
4308
4309 Manager *m = userdata;
4310 ssize_t l;
4311 size_t n;
4312 Unit *u;
4313
4314 assert_se(source);
4315 assert_se(m);
4316
4317 /* Invoked whenever a child process succeeded resolving its user/group to use and sent us the resulting UID/GID
4318 * in a datagram. We parse the datagram here and pass it off to the unit, so that it can add a reference to the
4319 * UID/GID so that it can destroy the UID/GID's IPC objects when the reference counter drops to 0. */
4320
4321 l = recv(fd, &buffer, sizeof(buffer), MSG_DONTWAIT);
4322 if (l < 0) {
4323 if (ERRNO_IS_TRANSIENT(errno))
4324 return 0;
4325
4326 return log_error_errno(errno, "Failed to read from user lookup fd: %m");
4327 }
4328
4329 if ((size_t) l <= offsetof(struct buffer, unit_name)) {
4330 log_warning("Received too short user lookup message, ignoring.");
4331 return 0;
4332 }
4333
4334 if ((size_t) l > offsetof(struct buffer, unit_name) + UNIT_NAME_MAX) {
4335 log_warning("Received too long user lookup message, ignoring.");
4336 return 0;
4337 }
4338
4339 if (!uid_is_valid(buffer.uid) && !gid_is_valid(buffer.gid)) {
4340 log_warning("Got user lookup message with invalid UID/GID pair, ignoring.");
4341 return 0;
4342 }
4343
4344 n = (size_t) l - offsetof(struct buffer, unit_name);
4345 if (memchr(buffer.unit_name, 0, n)) {
4346 log_warning("Received lookup message with embedded NUL character, ignoring.");
4347 return 0;
4348 }
4349
4350 buffer.unit_name[n] = 0;
4351 u = manager_get_unit(m, buffer.unit_name);
4352 if (!u) {
4353 log_debug("Got user lookup message but unit doesn't exist, ignoring.");
4354 return 0;
4355 }
4356
4357 log_unit_debug(u, "User lookup succeeded: uid=" UID_FMT " gid=" GID_FMT, buffer.uid, buffer.gid);
4358
4359 unit_notify_user_lookup(u, buffer.uid, buffer.gid);
4360 return 0;
4361 }
4362
4363 char *manager_taint_string(Manager *m) {
4364 _cleanup_free_ char *destination = NULL, *overflowuid = NULL, *overflowgid = NULL;
4365 char *buf, *e;
4366 int r;
4367
4368 /* Returns a "taint string", e.g. "local-hwclock:var-run-bad".
4369 * Only things that are detected at runtime should be tagged
4370 * here. For stuff that is set during compilation, emit a warning
4371 * in the configuration phase. */
4372
4373 assert(m);
4374
4375 buf = new(char, sizeof("split-usr:"
4376 "cgroups-missing:"
4377 "cgrousv1:"
4378 "local-hwclock:"
4379 "var-run-bad:"
4380 "overflowuid-not-65534:"
4381 "overflowgid-not-65534:"));
4382 if (!buf)
4383 return NULL;
4384
4385 e = buf;
4386 buf[0] = 0;
4387
4388 if (m->taint_usr)
4389 e = stpcpy(e, "split-usr:");
4390
4391 if (access("/proc/cgroups", F_OK) < 0)
4392 e = stpcpy(e, "cgroups-missing:");
4393
4394 if (cg_all_unified() == 0)
4395 e = stpcpy(e, "cgroupsv1:");
4396
4397 if (clock_is_localtime(NULL) > 0)
4398 e = stpcpy(e, "local-hwclock:");
4399
4400 r = readlink_malloc("/var/run", &destination);
4401 if (r < 0 || !PATH_IN_SET(destination, "../run", "/run"))
4402 e = stpcpy(e, "var-run-bad:");
4403
4404 r = read_one_line_file("/proc/sys/kernel/overflowuid", &overflowuid);
4405 if (r >= 0 && !streq(overflowuid, "65534"))
4406 e = stpcpy(e, "overflowuid-not-65534:");
4407
4408 r = read_one_line_file("/proc/sys/kernel/overflowgid", &overflowgid);
4409 if (r >= 0 && !streq(overflowgid, "65534"))
4410 e = stpcpy(e, "overflowgid-not-65534:");
4411
4412 /* remove the last ':' */
4413 if (e != buf)
4414 e[-1] = 0;
4415
4416 return buf;
4417 }
4418
4419 void manager_ref_console(Manager *m) {
4420 assert(m);
4421
4422 m->n_on_console++;
4423 }
4424
4425 void manager_unref_console(Manager *m) {
4426
4427 assert(m->n_on_console > 0);
4428 m->n_on_console--;
4429
4430 if (m->n_on_console == 0)
4431 m->no_console_output = false; /* unset no_console_output flag, since the console is definitely free now */
4432 }
4433
4434 void manager_override_log_level(Manager *m, int level) {
4435 _cleanup_free_ char *s = NULL;
4436 assert(m);
4437
4438 if (!m->log_level_overridden) {
4439 m->original_log_level = log_get_max_level();
4440 m->log_level_overridden = true;
4441 }
4442
4443 (void) log_level_to_string_alloc(level, &s);
4444 log_info("Setting log level to %s.", strna(s));
4445
4446 log_set_max_level(level);
4447 }
4448
4449 void manager_restore_original_log_level(Manager *m) {
4450 _cleanup_free_ char *s = NULL;
4451 assert(m);
4452
4453 if (!m->log_level_overridden)
4454 return;
4455
4456 (void) log_level_to_string_alloc(m->original_log_level, &s);
4457 log_info("Restoring log level to original (%s).", strna(s));
4458
4459 log_set_max_level(m->original_log_level);
4460 m->log_level_overridden = false;
4461 }
4462
4463 void manager_override_log_target(Manager *m, LogTarget target) {
4464 assert(m);
4465
4466 if (!m->log_target_overridden) {
4467 m->original_log_target = log_get_target();
4468 m->log_target_overridden = true;
4469 }
4470
4471 log_info("Setting log target to %s.", log_target_to_string(target));
4472 log_set_target(target);
4473 }
4474
4475 void manager_restore_original_log_target(Manager *m) {
4476 assert(m);
4477
4478 if (!m->log_target_overridden)
4479 return;
4480
4481 log_info("Restoring log target to original %s.", log_target_to_string(m->original_log_target));
4482
4483 log_set_target(m->original_log_target);
4484 m->log_target_overridden = false;
4485 }
4486
4487 ManagerTimestamp manager_timestamp_initrd_mangle(ManagerTimestamp s) {
4488 if (in_initrd() &&
4489 s >= MANAGER_TIMESTAMP_SECURITY_START &&
4490 s <= MANAGER_TIMESTAMP_UNITS_LOAD_FINISH)
4491 return s - MANAGER_TIMESTAMP_SECURITY_START + MANAGER_TIMESTAMP_INITRD_SECURITY_START;
4492 return s;
4493 }
4494
4495 static const char *const manager_state_table[_MANAGER_STATE_MAX] = {
4496 [MANAGER_INITIALIZING] = "initializing",
4497 [MANAGER_STARTING] = "starting",
4498 [MANAGER_RUNNING] = "running",
4499 [MANAGER_DEGRADED] = "degraded",
4500 [MANAGER_MAINTENANCE] = "maintenance",
4501 [MANAGER_STOPPING] = "stopping",
4502 };
4503
4504 DEFINE_STRING_TABLE_LOOKUP(manager_state, ManagerState);
4505
4506 static const char *const manager_timestamp_table[_MANAGER_TIMESTAMP_MAX] = {
4507 [MANAGER_TIMESTAMP_FIRMWARE] = "firmware",
4508 [MANAGER_TIMESTAMP_LOADER] = "loader",
4509 [MANAGER_TIMESTAMP_KERNEL] = "kernel",
4510 [MANAGER_TIMESTAMP_INITRD] = "initrd",
4511 [MANAGER_TIMESTAMP_USERSPACE] = "userspace",
4512 [MANAGER_TIMESTAMP_FINISH] = "finish",
4513 [MANAGER_TIMESTAMP_SECURITY_START] = "security-start",
4514 [MANAGER_TIMESTAMP_SECURITY_FINISH] = "security-finish",
4515 [MANAGER_TIMESTAMP_GENERATORS_START] = "generators-start",
4516 [MANAGER_TIMESTAMP_GENERATORS_FINISH] = "generators-finish",
4517 [MANAGER_TIMESTAMP_UNITS_LOAD_START] = "units-load-start",
4518 [MANAGER_TIMESTAMP_UNITS_LOAD_FINISH] = "units-load-finish",
4519 [MANAGER_TIMESTAMP_UNITS_LOAD] = "units-load",
4520 [MANAGER_TIMESTAMP_INITRD_SECURITY_START] = "initrd-security-start",
4521 [MANAGER_TIMESTAMP_INITRD_SECURITY_FINISH] = "initrd-security-finish",
4522 [MANAGER_TIMESTAMP_INITRD_GENERATORS_START] = "initrd-generators-start",
4523 [MANAGER_TIMESTAMP_INITRD_GENERATORS_FINISH] = "initrd-generators-finish",
4524 [MANAGER_TIMESTAMP_INITRD_UNITS_LOAD_START] = "initrd-units-load-start",
4525 [MANAGER_TIMESTAMP_INITRD_UNITS_LOAD_FINISH] = "initrd-units-load-finish",
4526 };
4527
4528 DEFINE_STRING_TABLE_LOOKUP(manager_timestamp, ManagerTimestamp);
4529
4530 static const char* const oom_policy_table[_OOM_POLICY_MAX] = {
4531 [OOM_CONTINUE] = "continue",
4532 [OOM_STOP] = "stop",
4533 [OOM_KILL] = "kill",
4534 };
4535
4536 DEFINE_STRING_TABLE_LOOKUP(oom_policy, OOMPolicy);
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