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core: use an AF_UNIX/SOCK_DGRAM socket for cgroup agent notification
[thirdparty/systemd.git] / src / core / manager.c
1 /***
2 This file is part of systemd.
3
4 Copyright 2010 Lennart Poettering
5
6 systemd is free software; you can redistribute it and/or modify it
7 under the terms of the GNU Lesser General Public License as published by
8 the Free Software Foundation; either version 2.1 of the License, or
9 (at your option) any later version.
10
11 systemd is distributed in the hope that it will be useful, but
12 WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 Lesser General Public License for more details.
15
16 You should have received a copy of the GNU Lesser General Public License
17 along with systemd; If not, see <http://www.gnu.org/licenses/>.
18 ***/
19
20 #include <dirent.h>
21 #include <errno.h>
22 #include <fcntl.h>
23 #include <linux/kd.h>
24 #include <signal.h>
25 #include <string.h>
26 #include <sys/epoll.h>
27 #include <sys/inotify.h>
28 #include <sys/ioctl.h>
29 #include <sys/reboot.h>
30 #include <sys/timerfd.h>
31 #include <sys/wait.h>
32 #include <unistd.h>
33
34 #ifdef HAVE_AUDIT
35 #include <libaudit.h>
36 #endif
37
38 #include "sd-daemon.h"
39 #include "sd-messages.h"
40
41 #include "alloc-util.h"
42 #include "audit-fd.h"
43 #include "boot-timestamps.h"
44 #include "bus-common-errors.h"
45 #include "bus-error.h"
46 #include "bus-kernel.h"
47 #include "bus-util.h"
48 #include "dbus-job.h"
49 #include "dbus-manager.h"
50 #include "dbus-unit.h"
51 #include "dbus.h"
52 #include "dirent-util.h"
53 #include "env-util.h"
54 #include "escape.h"
55 #include "exit-status.h"
56 #include "fd-util.h"
57 #include "fileio.h"
58 #include "fs-util.h"
59 #include "hashmap.h"
60 #include "io-util.h"
61 #include "locale-setup.h"
62 #include "log.h"
63 #include "macro.h"
64 #include "manager.h"
65 #include "missing.h"
66 #include "mkdir.h"
67 #include "mkdir.h"
68 #include "parse-util.h"
69 #include "path-lookup.h"
70 #include "path-util.h"
71 #include "process-util.h"
72 #include "ratelimit.h"
73 #include "rm-rf.h"
74 #include "signal-util.h"
75 #include "special.h"
76 #include "stat-util.h"
77 #include "string-table.h"
78 #include "string-util.h"
79 #include "strv.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 "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 (5*USEC_PER_SEC)
94 #define JOBS_IN_PROGRESS_PERIOD_USEC (USEC_PER_SEC / 3)
95 #define JOBS_IN_PROGRESS_PERIOD_DIVISOR 3
96
97 static int manager_dispatch_notify_fd(sd_event_source *source, int fd, uint32_t revents, void *userdata);
98 static int manager_dispatch_cgroups_agent_fd(sd_event_source *source, int fd, uint32_t revents, void *userdata);
99 static int manager_dispatch_signal_fd(sd_event_source *source, int fd, uint32_t revents, void *userdata);
100 static int manager_dispatch_time_change_fd(sd_event_source *source, int fd, uint32_t revents, void *userdata);
101 static int manager_dispatch_idle_pipe_fd(sd_event_source *source, int fd, uint32_t revents, void *userdata);
102 static int manager_dispatch_jobs_in_progress(sd_event_source *source, usec_t usec, void *userdata);
103 static int manager_dispatch_run_queue(sd_event_source *source, void *userdata);
104 static int manager_run_generators(Manager *m);
105
106 static void manager_watch_jobs_in_progress(Manager *m) {
107 usec_t next;
108 int r;
109
110 assert(m);
111
112 if (m->jobs_in_progress_event_source)
113 return;
114
115 next = now(CLOCK_MONOTONIC) + JOBS_IN_PROGRESS_WAIT_USEC;
116 r = sd_event_add_time(
117 m->event,
118 &m->jobs_in_progress_event_source,
119 CLOCK_MONOTONIC,
120 next, 0,
121 manager_dispatch_jobs_in_progress, m);
122 if (r < 0)
123 return;
124
125 (void) sd_event_source_set_description(m->jobs_in_progress_event_source, "manager-jobs-in-progress");
126 }
127
128 #define CYLON_BUFFER_EXTRA (2*(sizeof(ANSI_RED)-1) + sizeof(ANSI_HIGHLIGHT_RED)-1 + 2*(sizeof(ANSI_NORMAL)-1))
129
130 static void draw_cylon(char buffer[], size_t buflen, unsigned width, unsigned pos) {
131 char *p = buffer;
132
133 assert(buflen >= CYLON_BUFFER_EXTRA + width + 1);
134 assert(pos <= width+1); /* 0 or width+1 mean that the center light is behind the corner */
135
136 if (pos > 1) {
137 if (pos > 2)
138 p = mempset(p, ' ', pos-2);
139 p = stpcpy(p, ANSI_RED);
140 *p++ = '*';
141 }
142
143 if (pos > 0 && pos <= width) {
144 p = stpcpy(p, ANSI_HIGHLIGHT_RED);
145 *p++ = '*';
146 }
147
148 p = stpcpy(p, ANSI_NORMAL);
149
150 if (pos < width) {
151 p = stpcpy(p, ANSI_RED);
152 *p++ = '*';
153 if (pos < width-1)
154 p = mempset(p, ' ', width-1-pos);
155 strcpy(p, ANSI_NORMAL);
156 }
157 }
158
159 void manager_flip_auto_status(Manager *m, bool enable) {
160 assert(m);
161
162 if (enable) {
163 if (m->show_status == SHOW_STATUS_AUTO)
164 manager_set_show_status(m, SHOW_STATUS_TEMPORARY);
165 } else {
166 if (m->show_status == SHOW_STATUS_TEMPORARY)
167 manager_set_show_status(m, SHOW_STATUS_AUTO);
168 }
169 }
170
171 static void manager_print_jobs_in_progress(Manager *m) {
172 _cleanup_free_ char *job_of_n = NULL;
173 Iterator i;
174 Job *j;
175 unsigned counter = 0, print_nr;
176 char cylon[6 + CYLON_BUFFER_EXTRA + 1];
177 unsigned cylon_pos;
178 char time[FORMAT_TIMESPAN_MAX], limit[FORMAT_TIMESPAN_MAX] = "no limit";
179 uint64_t x;
180
181 assert(m);
182 assert(m->n_running_jobs > 0);
183
184 manager_flip_auto_status(m, true);
185
186 print_nr = (m->jobs_in_progress_iteration / JOBS_IN_PROGRESS_PERIOD_DIVISOR) % m->n_running_jobs;
187
188 HASHMAP_FOREACH(j, m->jobs, i)
189 if (j->state == JOB_RUNNING && counter++ == print_nr)
190 break;
191
192 /* m->n_running_jobs must be consistent with the contents of m->jobs,
193 * so the above loop must have succeeded in finding j. */
194 assert(counter == print_nr + 1);
195 assert(j);
196
197 cylon_pos = m->jobs_in_progress_iteration % 14;
198 if (cylon_pos >= 8)
199 cylon_pos = 14 - cylon_pos;
200 draw_cylon(cylon, sizeof(cylon), 6, cylon_pos);
201
202 m->jobs_in_progress_iteration++;
203
204 if (m->n_running_jobs > 1) {
205 if (asprintf(&job_of_n, "(%u of %u) ", counter, m->n_running_jobs) < 0)
206 job_of_n = NULL;
207 }
208
209 format_timespan(time, sizeof(time), now(CLOCK_MONOTONIC) - j->begin_usec, 1*USEC_PER_SEC);
210 if (job_get_timeout(j, &x) > 0)
211 format_timespan(limit, sizeof(limit), x - j->begin_usec, 1*USEC_PER_SEC);
212
213 manager_status_printf(m, STATUS_TYPE_EPHEMERAL, cylon,
214 "%sA %s job is running for %s (%s / %s)",
215 strempty(job_of_n),
216 job_type_to_string(j->type),
217 unit_description(j->unit),
218 time, limit);
219 }
220
221 static int have_ask_password(void) {
222 _cleanup_closedir_ DIR *dir;
223
224 dir = opendir("/run/systemd/ask-password");
225 if (!dir) {
226 if (errno == ENOENT)
227 return false;
228 else
229 return -errno;
230 }
231
232 for (;;) {
233 struct dirent *de;
234
235 errno = 0;
236 de = readdir(dir);
237 if (!de && errno > 0)
238 return -errno;
239 if (!de)
240 return false;
241
242 if (startswith(de->d_name, "ask."))
243 return true;
244 }
245 }
246
247 static int manager_dispatch_ask_password_fd(sd_event_source *source,
248 int fd, uint32_t revents, void *userdata) {
249 Manager *m = userdata;
250
251 assert(m);
252
253 flush_fd(fd);
254
255 m->have_ask_password = have_ask_password();
256 if (m->have_ask_password < 0)
257 /* Log error but continue. Negative have_ask_password
258 * is treated as unknown status. */
259 log_error_errno(m->have_ask_password, "Failed to list /run/systemd/ask-password: %m");
260
261 return 0;
262 }
263
264 static void manager_close_ask_password(Manager *m) {
265 assert(m);
266
267 m->ask_password_event_source = sd_event_source_unref(m->ask_password_event_source);
268 m->ask_password_inotify_fd = safe_close(m->ask_password_inotify_fd);
269 m->have_ask_password = -EINVAL;
270 }
271
272 static int manager_check_ask_password(Manager *m) {
273 int r;
274
275 assert(m);
276
277 if (!m->ask_password_event_source) {
278 assert(m->ask_password_inotify_fd < 0);
279
280 mkdir_p_label("/run/systemd/ask-password", 0755);
281
282 m->ask_password_inotify_fd = inotify_init1(IN_NONBLOCK|IN_CLOEXEC);
283 if (m->ask_password_inotify_fd < 0)
284 return log_error_errno(errno, "inotify_init1() failed: %m");
285
286 if (inotify_add_watch(m->ask_password_inotify_fd, "/run/systemd/ask-password", IN_CREATE|IN_DELETE|IN_MOVE) < 0) {
287 log_error_errno(errno, "Failed to add watch on /run/systemd/ask-password: %m");
288 manager_close_ask_password(m);
289 return -errno;
290 }
291
292 r = sd_event_add_io(m->event, &m->ask_password_event_source,
293 m->ask_password_inotify_fd, EPOLLIN,
294 manager_dispatch_ask_password_fd, m);
295 if (r < 0) {
296 log_error_errno(errno, "Failed to add event source for /run/systemd/ask-password: %m");
297 manager_close_ask_password(m);
298 return -errno;
299 }
300
301 (void) sd_event_source_set_description(m->ask_password_event_source, "manager-ask-password");
302
303 /* Queries might have been added meanwhile... */
304 manager_dispatch_ask_password_fd(m->ask_password_event_source,
305 m->ask_password_inotify_fd, EPOLLIN, m);
306 }
307
308 return m->have_ask_password;
309 }
310
311 static int manager_watch_idle_pipe(Manager *m) {
312 int r;
313
314 assert(m);
315
316 if (m->idle_pipe_event_source)
317 return 0;
318
319 if (m->idle_pipe[2] < 0)
320 return 0;
321
322 r = sd_event_add_io(m->event, &m->idle_pipe_event_source, m->idle_pipe[2], EPOLLIN, manager_dispatch_idle_pipe_fd, m);
323 if (r < 0)
324 return log_error_errno(r, "Failed to watch idle pipe: %m");
325
326 (void) sd_event_source_set_description(m->idle_pipe_event_source, "manager-idle-pipe");
327
328 return 0;
329 }
330
331 static void manager_close_idle_pipe(Manager *m) {
332 assert(m);
333
334 m->idle_pipe_event_source = sd_event_source_unref(m->idle_pipe_event_source);
335
336 safe_close_pair(m->idle_pipe);
337 safe_close_pair(m->idle_pipe + 2);
338 }
339
340 static int manager_setup_time_change(Manager *m) {
341 int r;
342
343 /* We only care for the cancellation event, hence we set the
344 * timeout to the latest possible value. */
345 struct itimerspec its = {
346 .it_value.tv_sec = TIME_T_MAX,
347 };
348
349 assert(m);
350 assert_cc(sizeof(time_t) == sizeof(TIME_T_MAX));
351
352 if (m->test_run)
353 return 0;
354
355 /* Uses TFD_TIMER_CANCEL_ON_SET to get notifications whenever
356 * CLOCK_REALTIME makes a jump relative to CLOCK_MONOTONIC */
357
358 m->time_change_fd = timerfd_create(CLOCK_REALTIME, TFD_NONBLOCK|TFD_CLOEXEC);
359 if (m->time_change_fd < 0)
360 return log_error_errno(errno, "Failed to create timerfd: %m");
361
362 if (timerfd_settime(m->time_change_fd, TFD_TIMER_ABSTIME|TFD_TIMER_CANCEL_ON_SET, &its, NULL) < 0) {
363 log_debug_errno(errno, "Failed to set up TFD_TIMER_CANCEL_ON_SET, ignoring: %m");
364 m->time_change_fd = safe_close(m->time_change_fd);
365 return 0;
366 }
367
368 r = sd_event_add_io(m->event, &m->time_change_event_source, m->time_change_fd, EPOLLIN, manager_dispatch_time_change_fd, m);
369 if (r < 0)
370 return log_error_errno(r, "Failed to create time change event source: %m");
371
372 (void) sd_event_source_set_description(m->time_change_event_source, "manager-time-change");
373
374 log_debug("Set up TFD_TIMER_CANCEL_ON_SET timerfd.");
375
376 return 0;
377 }
378
379 static int enable_special_signals(Manager *m) {
380 _cleanup_close_ int fd = -1;
381
382 assert(m);
383
384 if (m->test_run)
385 return 0;
386
387 /* Enable that we get SIGINT on control-alt-del. In containers
388 * this will fail with EPERM (older) or EINVAL (newer), so
389 * ignore that. */
390 if (reboot(RB_DISABLE_CAD) < 0 && errno != EPERM && errno != EINVAL)
391 log_warning_errno(errno, "Failed to enable ctrl-alt-del handling: %m");
392
393 fd = open_terminal("/dev/tty0", O_RDWR|O_NOCTTY|O_CLOEXEC);
394 if (fd < 0) {
395 /* Support systems without virtual console */
396 if (fd != -ENOENT)
397 log_warning_errno(errno, "Failed to open /dev/tty0: %m");
398 } else {
399 /* Enable that we get SIGWINCH on kbrequest */
400 if (ioctl(fd, KDSIGACCEPT, SIGWINCH) < 0)
401 log_warning_errno(errno, "Failed to enable kbrequest handling: %m");
402 }
403
404 return 0;
405 }
406
407 static int manager_setup_signals(Manager *m) {
408 struct sigaction sa = {
409 .sa_handler = SIG_DFL,
410 .sa_flags = SA_NOCLDSTOP|SA_RESTART,
411 };
412 sigset_t mask;
413 int r;
414
415 assert(m);
416
417 assert_se(sigaction(SIGCHLD, &sa, NULL) == 0);
418
419 /* We make liberal use of realtime signals here. On
420 * Linux/glibc we have 30 of them (with the exception of Linux
421 * on hppa, see below), between SIGRTMIN+0 ... SIGRTMIN+30
422 * (aka SIGRTMAX). */
423
424 assert_se(sigemptyset(&mask) == 0);
425 sigset_add_many(&mask,
426 SIGCHLD, /* Child died */
427 SIGTERM, /* Reexecute daemon */
428 SIGHUP, /* Reload configuration */
429 SIGUSR1, /* systemd/upstart: reconnect to D-Bus */
430 SIGUSR2, /* systemd: dump status */
431 SIGINT, /* Kernel sends us this on control-alt-del */
432 SIGWINCH, /* Kernel sends us this on kbrequest (alt-arrowup) */
433 SIGPWR, /* Some kernel drivers and upsd send us this on power failure */
434
435 SIGRTMIN+0, /* systemd: start default.target */
436 SIGRTMIN+1, /* systemd: isolate rescue.target */
437 SIGRTMIN+2, /* systemd: isolate emergency.target */
438 SIGRTMIN+3, /* systemd: start halt.target */
439 SIGRTMIN+4, /* systemd: start poweroff.target */
440 SIGRTMIN+5, /* systemd: start reboot.target */
441 SIGRTMIN+6, /* systemd: start kexec.target */
442
443 /* ... space for more special targets ... */
444
445 SIGRTMIN+13, /* systemd: Immediate halt */
446 SIGRTMIN+14, /* systemd: Immediate poweroff */
447 SIGRTMIN+15, /* systemd: Immediate reboot */
448 SIGRTMIN+16, /* systemd: Immediate kexec */
449
450 /* ... space for more immediate system state changes ... */
451
452 SIGRTMIN+20, /* systemd: enable status messages */
453 SIGRTMIN+21, /* systemd: disable status messages */
454 SIGRTMIN+22, /* systemd: set log level to LOG_DEBUG */
455 SIGRTMIN+23, /* systemd: set log level to LOG_INFO */
456 SIGRTMIN+24, /* systemd: Immediate exit (--user only) */
457
458 /* .. one free signal here ... */
459
460 #if !defined(__hppa64__) && !defined(__hppa__)
461 /* Apparently Linux on hppa has fewer RT
462 * signals (SIGRTMAX is SIGRTMIN+25 there),
463 * hence let's not try to make use of them
464 * here. Since these commands are accessible
465 * by different means and only really a safety
466 * net, the missing functionality on hppa
467 * shouldn't matter. */
468
469 SIGRTMIN+26, /* systemd: set log target to journal-or-kmsg */
470 SIGRTMIN+27, /* systemd: set log target to console */
471 SIGRTMIN+28, /* systemd: set log target to kmsg */
472 SIGRTMIN+29, /* systemd: set log target to syslog-or-kmsg (obsolete) */
473
474 /* ... one free signal here SIGRTMIN+30 ... */
475 #endif
476 -1);
477 assert_se(sigprocmask(SIG_SETMASK, &mask, NULL) == 0);
478
479 m->signal_fd = signalfd(-1, &mask, SFD_NONBLOCK|SFD_CLOEXEC);
480 if (m->signal_fd < 0)
481 return -errno;
482
483 r = sd_event_add_io(m->event, &m->signal_event_source, m->signal_fd, EPOLLIN, manager_dispatch_signal_fd, m);
484 if (r < 0)
485 return r;
486
487 (void) sd_event_source_set_description(m->signal_event_source, "manager-signal");
488
489 /* Process signals a bit earlier than the rest of things, but later than notify_fd processing, so that the
490 * notify processing can still figure out to which process/service a message belongs, before we reap the
491 * process. Also, process this before handling cgroup notifications, so that we always collect child exit
492 * status information before detecting that there's no process in a cgroup. */
493 r = sd_event_source_set_priority(m->signal_event_source, SD_EVENT_PRIORITY_NORMAL-6);
494 if (r < 0)
495 return r;
496
497 if (MANAGER_IS_SYSTEM(m))
498 return enable_special_signals(m);
499
500 return 0;
501 }
502
503 static void manager_clean_environment(Manager *m) {
504 assert(m);
505
506 /* Let's remove some environment variables that we
507 * need ourselves to communicate with our clients */
508 strv_env_unset_many(
509 m->environment,
510 "NOTIFY_SOCKET",
511 "MAINPID",
512 "MANAGERPID",
513 "LISTEN_PID",
514 "LISTEN_FDS",
515 "LISTEN_FDNAMES",
516 "WATCHDOG_PID",
517 "WATCHDOG_USEC",
518 NULL);
519 }
520
521 static int manager_default_environment(Manager *m) {
522 assert(m);
523
524 if (MANAGER_IS_SYSTEM(m)) {
525 /* The system manager always starts with a clean
526 * environment for its children. It does not import
527 * the kernel or the parents exported variables.
528 *
529 * The initial passed environ is untouched to keep
530 * /proc/self/environ valid; it is used for tagging
531 * the init process inside containers. */
532 m->environment = strv_new("PATH=" DEFAULT_PATH,
533 NULL);
534
535 /* Import locale variables LC_*= from configuration */
536 locale_setup(&m->environment);
537 } else {
538 /* The user manager passes its own environment
539 * along to its children. */
540 m->environment = strv_copy(environ);
541 }
542
543 if (!m->environment)
544 return -ENOMEM;
545
546 manager_clean_environment(m);
547 strv_sort(m->environment);
548
549 return 0;
550 }
551
552
553 int manager_new(UnitFileScope scope, bool test_run, Manager **_m) {
554 Manager *m;
555 int r;
556
557 assert(_m);
558 assert(IN_SET(scope, UNIT_FILE_SYSTEM, UNIT_FILE_USER));
559
560 m = new0(Manager, 1);
561 if (!m)
562 return -ENOMEM;
563
564 m->unit_file_scope = scope;
565 m->exit_code = _MANAGER_EXIT_CODE_INVALID;
566 m->default_timer_accuracy_usec = USEC_PER_MINUTE;
567 m->default_tasks_accounting = true;
568 m->default_tasks_max = UINT64_C(512);
569
570 #ifdef ENABLE_EFI
571 if (MANAGER_IS_SYSTEM(m) && detect_container() <= 0)
572 boot_timestamps(&m->userspace_timestamp, &m->firmware_timestamp, &m->loader_timestamp);
573 #endif
574
575 /* Prepare log fields we can use for structured logging */
576 if (MANAGER_IS_SYSTEM(m)) {
577 m->unit_log_field = "UNIT=";
578 m->unit_log_format_string = "UNIT=%s";
579 } else {
580 m->unit_log_field = "USER_UNIT=";
581 m->unit_log_format_string = "USER_UNIT=%s";
582 }
583
584 m->idle_pipe[0] = m->idle_pipe[1] = m->idle_pipe[2] = m->idle_pipe[3] = -1;
585
586 m->pin_cgroupfs_fd = m->notify_fd = m->cgroups_agent_fd = m->signal_fd = m->time_change_fd =
587 m->dev_autofs_fd = m->private_listen_fd = m->kdbus_fd = m->cgroup_inotify_fd =
588 m->ask_password_inotify_fd = -1;
589
590 m->current_job_id = 1; /* start as id #1, so that we can leave #0 around as "null-like" value */
591
592 m->have_ask_password = -EINVAL; /* we don't know */
593 m->first_boot = -1;
594
595 m->test_run = test_run;
596
597 /* Reboot immediately if the user hits C-A-D more often than 7x per 2s */
598 RATELIMIT_INIT(m->ctrl_alt_del_ratelimit, 2 * USEC_PER_SEC, 7);
599
600 r = manager_default_environment(m);
601 if (r < 0)
602 goto fail;
603
604 r = hashmap_ensure_allocated(&m->units, &string_hash_ops);
605 if (r < 0)
606 goto fail;
607
608 r = hashmap_ensure_allocated(&m->jobs, NULL);
609 if (r < 0)
610 goto fail;
611
612 r = hashmap_ensure_allocated(&m->cgroup_unit, &string_hash_ops);
613 if (r < 0)
614 goto fail;
615
616 r = hashmap_ensure_allocated(&m->watch_bus, &string_hash_ops);
617 if (r < 0)
618 goto fail;
619
620 r = sd_event_default(&m->event);
621 if (r < 0)
622 goto fail;
623
624 r = sd_event_add_defer(m->event, &m->run_queue_event_source, manager_dispatch_run_queue, m);
625 if (r < 0)
626 goto fail;
627
628 r = sd_event_source_set_priority(m->run_queue_event_source, SD_EVENT_PRIORITY_IDLE);
629 if (r < 0)
630 goto fail;
631
632 r = sd_event_source_set_enabled(m->run_queue_event_source, SD_EVENT_OFF);
633 if (r < 0)
634 goto fail;
635
636 (void) sd_event_source_set_description(m->run_queue_event_source, "manager-run-queue");
637
638 r = manager_setup_signals(m);
639 if (r < 0)
640 goto fail;
641
642 r = manager_setup_cgroup(m);
643 if (r < 0)
644 goto fail;
645
646 r = manager_setup_time_change(m);
647 if (r < 0)
648 goto fail;
649
650 m->udev = udev_new();
651 if (!m->udev) {
652 r = -ENOMEM;
653 goto fail;
654 }
655
656 /* Note that we set up neither kdbus, nor the notify fd
657 * here. We do that after deserialization, since they might
658 * have gotten serialized across the reexec. */
659
660 m->taint_usr = dir_is_empty("/usr") > 0;
661
662 *_m = m;
663 return 0;
664
665 fail:
666 manager_free(m);
667 return r;
668 }
669
670 static int manager_setup_notify(Manager *m) {
671 int r;
672
673 if (m->test_run)
674 return 0;
675
676 if (m->notify_fd < 0) {
677 _cleanup_close_ int fd = -1;
678 union sockaddr_union sa = {
679 .sa.sa_family = AF_UNIX,
680 };
681 static const int one = 1;
682 const char *e;
683
684 /* First free all secondary fields */
685 m->notify_socket = mfree(m->notify_socket);
686 m->notify_event_source = sd_event_source_unref(m->notify_event_source);
687
688 fd = socket(AF_UNIX, SOCK_DGRAM|SOCK_CLOEXEC|SOCK_NONBLOCK, 0);
689 if (fd < 0)
690 return log_error_errno(errno, "Failed to allocate notification socket: %m");
691
692 fd_inc_rcvbuf(fd, NOTIFY_RCVBUF_SIZE);
693
694 e = manager_get_runtime_prefix(m);
695 if (!e) {
696 log_error("Failed to determine runtime prefix.");
697 return -EINVAL;
698 }
699
700 m->notify_socket = strappend(e, "/systemd/notify");
701 if (!m->notify_socket)
702 return log_oom();
703
704 (void) mkdir_parents_label(m->notify_socket, 0755);
705 (void) unlink(m->notify_socket);
706
707 strncpy(sa.un.sun_path, m->notify_socket, sizeof(sa.un.sun_path)-1);
708 r = bind(fd, &sa.sa, offsetof(struct sockaddr_un, sun_path) + strlen(sa.un.sun_path));
709 if (r < 0)
710 return log_error_errno(errno, "bind(%s) failed: %m", sa.un.sun_path);
711
712 r = setsockopt(fd, SOL_SOCKET, SO_PASSCRED, &one, sizeof(one));
713 if (r < 0)
714 return log_error_errno(errno, "SO_PASSCRED failed: %m");
715
716 m->notify_fd = fd;
717 fd = -1;
718
719 log_debug("Using notification socket %s", m->notify_socket);
720 }
721
722 if (!m->notify_event_source) {
723 r = sd_event_add_io(m->event, &m->notify_event_source, m->notify_fd, EPOLLIN, manager_dispatch_notify_fd, m);
724 if (r < 0)
725 return log_error_errno(r, "Failed to allocate notify event source: %m");
726
727 /* Process notification messages a bit earlier than SIGCHLD, so that we can still identify to which
728 * service an exit message belongs. */
729 r = sd_event_source_set_priority(m->notify_event_source, SD_EVENT_PRIORITY_NORMAL-7);
730 if (r < 0)
731 return log_error_errno(r, "Failed to set priority of notify event source: %m");
732
733 (void) sd_event_source_set_description(m->notify_event_source, "manager-notify");
734 }
735
736 return 0;
737 }
738
739 static int manager_setup_cgroups_agent(Manager *m) {
740
741 static const union sockaddr_union sa = {
742 .un.sun_family = AF_UNIX,
743 .un.sun_path = "/run/systemd/cgroups-agent",
744 };
745 int r;
746
747 /* This creates a listening socket we receive cgroups agent messages on. We do not use D-Bus for delivering
748 * these messages from the cgroups agent binary to PID 1, as the cgroups agent binary is very short-living, and
749 * each instance of it needs a new D-Bus connection. Since D-Bus connections are SOCK_STREAM/AF_UNIX, on
750 * overloaded systems the backlog of the D-Bus socket becomes relevant, as not more than the configured number
751 * of D-Bus connections may be queued until the kernel will start dropping further incoming connections,
752 * possibly resulting in lost cgroups agent messages. To avoid this, we'll use a private SOCK_DGRAM/AF_UNIX
753 * socket, where no backlog is relevant as communication may take place without an actual connect() cycle, and
754 * we thus won't lose messages.
755 *
756 * Note that PID 1 will forward the agent message to system bus, so that the user systemd instance may listen
757 * to it. The system instance hence listens on this special socket, but the user instances listen on the system
758 * bus for these messages. */
759
760 if (m->test_run)
761 return 0;
762
763 if (!MANAGER_IS_SYSTEM(m))
764 return 0;
765
766 if (cg_unified() > 0) /* We don't need this anymore on the unified hierarchy */
767 return 0;
768
769 if (m->cgroups_agent_fd < 0) {
770 _cleanup_close_ int fd = -1;
771
772 /* First free all secondary fields */
773 m->cgroups_agent_event_source = sd_event_source_unref(m->cgroups_agent_event_source);
774
775 fd = socket(AF_UNIX, SOCK_DGRAM|SOCK_CLOEXEC|SOCK_NONBLOCK, 0);
776 if (fd < 0)
777 return log_error_errno(errno, "Failed to allocate cgroups agent socket: %m");
778
779 fd_inc_rcvbuf(fd, CGROUPS_AGENT_RCVBUF_SIZE);
780
781 (void) unlink(sa.un.sun_path);
782
783 /* Only allow root to connect to this socket */
784 RUN_WITH_UMASK(0077)
785 r = bind(fd, &sa.sa, offsetof(struct sockaddr_un, sun_path) + strlen(sa.un.sun_path));
786 if (r < 0)
787 return log_error_errno(errno, "bind(%s) failed: %m", sa.un.sun_path);
788
789 m->cgroups_agent_fd = fd;
790 fd = -1;
791 }
792
793 if (!m->cgroups_agent_event_source) {
794 r = sd_event_add_io(m->event, &m->cgroups_agent_event_source, m->cgroups_agent_fd, EPOLLIN, manager_dispatch_cgroups_agent_fd, m);
795 if (r < 0)
796 return log_error_errno(r, "Failed to allocate cgroups agent event source: %m");
797
798 /* Process cgroups notifications early, but after having processed service notification messages or
799 * SIGCHLD signals, so that a cgroup running empty is always just the last safety net of notification,
800 * and we collected the metadata the notification and SIGCHLD stuff offers first. Also see handling of
801 * cgroup inotify for the unified cgroup stuff. */
802 r = sd_event_source_set_priority(m->cgroups_agent_event_source, SD_EVENT_PRIORITY_NORMAL-5);
803 if (r < 0)
804 return log_error_errno(r, "Failed to set priority of cgroups agent event source: %m");
805
806 (void) sd_event_source_set_description(m->cgroups_agent_event_source, "manager-cgroups-agent");
807 }
808
809 return 0;
810 }
811
812 static int manager_setup_kdbus(Manager *m) {
813 _cleanup_free_ char *p = NULL;
814
815 assert(m);
816
817 if (m->test_run || m->kdbus_fd >= 0)
818 return 0;
819 if (!is_kdbus_available())
820 return -ESOCKTNOSUPPORT;
821
822 m->kdbus_fd = bus_kernel_create_bus(
823 MANAGER_IS_SYSTEM(m) ? "system" : "user",
824 MANAGER_IS_SYSTEM(m), &p);
825
826 if (m->kdbus_fd < 0)
827 return log_debug_errno(m->kdbus_fd, "Failed to set up kdbus: %m");
828
829 log_debug("Successfully set up kdbus on %s", p);
830
831 return 0;
832 }
833
834 static int manager_connect_bus(Manager *m, bool reexecuting) {
835 bool try_bus_connect;
836
837 assert(m);
838
839 if (m->test_run)
840 return 0;
841
842 try_bus_connect =
843 m->kdbus_fd >= 0 ||
844 reexecuting ||
845 (MANAGER_IS_USER(m) && getenv("DBUS_SESSION_BUS_ADDRESS"));
846
847 /* Try to connect to the buses, if possible. */
848 return bus_init(m, try_bus_connect);
849 }
850
851 static unsigned manager_dispatch_cleanup_queue(Manager *m) {
852 Unit *u;
853 unsigned n = 0;
854
855 assert(m);
856
857 while ((u = m->cleanup_queue)) {
858 assert(u->in_cleanup_queue);
859
860 unit_free(u);
861 n++;
862 }
863
864 return n;
865 }
866
867 enum {
868 GC_OFFSET_IN_PATH, /* This one is on the path we were traveling */
869 GC_OFFSET_UNSURE, /* No clue */
870 GC_OFFSET_GOOD, /* We still need this unit */
871 GC_OFFSET_BAD, /* We don't need this unit anymore */
872 _GC_OFFSET_MAX
873 };
874
875 static void unit_gc_sweep(Unit *u, unsigned gc_marker) {
876 Iterator i;
877 Unit *other;
878 bool is_bad;
879
880 assert(u);
881
882 if (u->gc_marker == gc_marker + GC_OFFSET_GOOD ||
883 u->gc_marker == gc_marker + GC_OFFSET_BAD ||
884 u->gc_marker == gc_marker + GC_OFFSET_IN_PATH)
885 return;
886
887 if (u->in_cleanup_queue)
888 goto bad;
889
890 if (unit_check_gc(u))
891 goto good;
892
893 u->gc_marker = gc_marker + GC_OFFSET_IN_PATH;
894
895 is_bad = true;
896
897 SET_FOREACH(other, u->dependencies[UNIT_REFERENCED_BY], i) {
898 unit_gc_sweep(other, gc_marker);
899
900 if (other->gc_marker == gc_marker + GC_OFFSET_GOOD)
901 goto good;
902
903 if (other->gc_marker != gc_marker + GC_OFFSET_BAD)
904 is_bad = false;
905 }
906
907 if (is_bad)
908 goto bad;
909
910 /* We were unable to find anything out about this entry, so
911 * let's investigate it later */
912 u->gc_marker = gc_marker + GC_OFFSET_UNSURE;
913 unit_add_to_gc_queue(u);
914 return;
915
916 bad:
917 /* We definitely know that this one is not useful anymore, so
918 * let's mark it for deletion */
919 u->gc_marker = gc_marker + GC_OFFSET_BAD;
920 unit_add_to_cleanup_queue(u);
921 return;
922
923 good:
924 u->gc_marker = gc_marker + GC_OFFSET_GOOD;
925 }
926
927 static unsigned manager_dispatch_gc_queue(Manager *m) {
928 Unit *u;
929 unsigned n = 0;
930 unsigned gc_marker;
931
932 assert(m);
933
934 /* log_debug("Running GC..."); */
935
936 m->gc_marker += _GC_OFFSET_MAX;
937 if (m->gc_marker + _GC_OFFSET_MAX <= _GC_OFFSET_MAX)
938 m->gc_marker = 1;
939
940 gc_marker = m->gc_marker;
941
942 while ((u = m->gc_queue)) {
943 assert(u->in_gc_queue);
944
945 unit_gc_sweep(u, gc_marker);
946
947 LIST_REMOVE(gc_queue, m->gc_queue, u);
948 u->in_gc_queue = false;
949
950 n++;
951
952 if (u->gc_marker == gc_marker + GC_OFFSET_BAD ||
953 u->gc_marker == gc_marker + GC_OFFSET_UNSURE) {
954 if (u->id)
955 log_unit_debug(u, "Collecting.");
956 u->gc_marker = gc_marker + GC_OFFSET_BAD;
957 unit_add_to_cleanup_queue(u);
958 }
959 }
960
961 m->n_in_gc_queue = 0;
962
963 return n;
964 }
965
966 static void manager_clear_jobs_and_units(Manager *m) {
967 Unit *u;
968
969 assert(m);
970
971 while ((u = hashmap_first(m->units)))
972 unit_free(u);
973
974 manager_dispatch_cleanup_queue(m);
975
976 assert(!m->load_queue);
977 assert(!m->run_queue);
978 assert(!m->dbus_unit_queue);
979 assert(!m->dbus_job_queue);
980 assert(!m->cleanup_queue);
981 assert(!m->gc_queue);
982
983 assert(hashmap_isempty(m->jobs));
984 assert(hashmap_isempty(m->units));
985
986 m->n_on_console = 0;
987 m->n_running_jobs = 0;
988 }
989
990 Manager* manager_free(Manager *m) {
991 UnitType c;
992 int i;
993
994 if (!m)
995 return NULL;
996
997 manager_clear_jobs_and_units(m);
998
999 for (c = 0; c < _UNIT_TYPE_MAX; c++)
1000 if (unit_vtable[c]->shutdown)
1001 unit_vtable[c]->shutdown(m);
1002
1003 /* If we reexecute ourselves, we keep the root cgroup
1004 * around */
1005 manager_shutdown_cgroup(m, m->exit_code != MANAGER_REEXECUTE);
1006
1007 lookup_paths_flush_generator(&m->lookup_paths);
1008
1009 bus_done(m);
1010
1011 hashmap_free(m->units);
1012 hashmap_free(m->jobs);
1013 hashmap_free(m->watch_pids1);
1014 hashmap_free(m->watch_pids2);
1015 hashmap_free(m->watch_bus);
1016
1017 set_free(m->startup_units);
1018 set_free(m->failed_units);
1019
1020 sd_event_source_unref(m->signal_event_source);
1021 sd_event_source_unref(m->notify_event_source);
1022 sd_event_source_unref(m->cgroups_agent_event_source);
1023 sd_event_source_unref(m->time_change_event_source);
1024 sd_event_source_unref(m->jobs_in_progress_event_source);
1025 sd_event_source_unref(m->run_queue_event_source);
1026
1027 safe_close(m->signal_fd);
1028 safe_close(m->notify_fd);
1029 safe_close(m->cgroups_agent_fd);
1030 safe_close(m->time_change_fd);
1031 safe_close(m->kdbus_fd);
1032
1033 manager_close_ask_password(m);
1034
1035 manager_close_idle_pipe(m);
1036
1037 udev_unref(m->udev);
1038 sd_event_unref(m->event);
1039
1040 free(m->notify_socket);
1041
1042 lookup_paths_free(&m->lookup_paths);
1043 strv_free(m->environment);
1044
1045 hashmap_free(m->cgroup_unit);
1046 set_free_free(m->unit_path_cache);
1047
1048 free(m->switch_root);
1049 free(m->switch_root_init);
1050
1051 for (i = 0; i < _RLIMIT_MAX; i++)
1052 m->rlimit[i] = mfree(m->rlimit[i]);
1053
1054 assert(hashmap_isempty(m->units_requiring_mounts_for));
1055 hashmap_free(m->units_requiring_mounts_for);
1056
1057 free(m);
1058 return NULL;
1059 }
1060
1061 void manager_enumerate(Manager *m) {
1062 UnitType c;
1063
1064 assert(m);
1065
1066 /* Let's ask every type to load all units from disk/kernel
1067 * that it might know */
1068 for (c = 0; c < _UNIT_TYPE_MAX; c++) {
1069 if (!unit_type_supported(c)) {
1070 log_debug("Unit type .%s is not supported on this system.", unit_type_to_string(c));
1071 continue;
1072 }
1073
1074 if (!unit_vtable[c]->enumerate)
1075 continue;
1076
1077 unit_vtable[c]->enumerate(m);
1078 }
1079
1080 manager_dispatch_load_queue(m);
1081 }
1082
1083 static void manager_coldplug(Manager *m) {
1084 Iterator i;
1085 Unit *u;
1086 char *k;
1087 int r;
1088
1089 assert(m);
1090
1091 /* Then, let's set up their initial state. */
1092 HASHMAP_FOREACH_KEY(u, k, m->units, i) {
1093
1094 /* ignore aliases */
1095 if (u->id != k)
1096 continue;
1097
1098 r = unit_coldplug(u);
1099 if (r < 0)
1100 log_warning_errno(r, "We couldn't coldplug %s, proceeding anyway: %m", u->id);
1101 }
1102 }
1103
1104 static void manager_build_unit_path_cache(Manager *m) {
1105 char **i;
1106 int r;
1107
1108 assert(m);
1109
1110 set_free_free(m->unit_path_cache);
1111
1112 m->unit_path_cache = set_new(&string_hash_ops);
1113 if (!m->unit_path_cache) {
1114 r = -ENOMEM;
1115 goto fail;
1116 }
1117
1118 /* This simply builds a list of files we know exist, so that
1119 * we don't always have to go to disk */
1120
1121 STRV_FOREACH(i, m->lookup_paths.search_path) {
1122 _cleanup_closedir_ DIR *d = NULL;
1123 struct dirent *de;
1124
1125 d = opendir(*i);
1126 if (!d) {
1127 if (errno != ENOENT)
1128 log_warning_errno(errno, "Failed to open directory %s, ignoring: %m", *i);
1129 continue;
1130 }
1131
1132 FOREACH_DIRENT(de, d, r = -errno; goto fail) {
1133 char *p;
1134
1135 p = strjoin(streq(*i, "/") ? "" : *i, "/", de->d_name, NULL);
1136 if (!p) {
1137 r = -ENOMEM;
1138 goto fail;
1139 }
1140
1141 r = set_consume(m->unit_path_cache, p);
1142 if (r < 0)
1143 goto fail;
1144 }
1145 }
1146
1147 return;
1148
1149 fail:
1150 log_warning_errno(r, "Failed to build unit path cache, proceeding without: %m");
1151 m->unit_path_cache = set_free_free(m->unit_path_cache);
1152 }
1153
1154 static void manager_distribute_fds(Manager *m, FDSet *fds) {
1155 Iterator i;
1156 Unit *u;
1157
1158 assert(m);
1159
1160 HASHMAP_FOREACH(u, m->units, i) {
1161
1162 if (fdset_size(fds) <= 0)
1163 break;
1164
1165 if (!UNIT_VTABLE(u)->distribute_fds)
1166 continue;
1167
1168 UNIT_VTABLE(u)->distribute_fds(u, fds);
1169 }
1170 }
1171
1172 int manager_startup(Manager *m, FILE *serialization, FDSet *fds) {
1173 int r, q;
1174
1175 assert(m);
1176
1177 r = lookup_paths_init(&m->lookup_paths, m->unit_file_scope, 0, NULL);
1178 if (r < 0)
1179 return r;
1180
1181 /* Make sure the transient directory always exists, so that it remains in the search path */
1182 r = mkdir_p_label(m->lookup_paths.transient, 0755);
1183 if (r < 0)
1184 return r;
1185
1186 dual_timestamp_get(&m->generators_start_timestamp);
1187 r = manager_run_generators(m);
1188 dual_timestamp_get(&m->generators_finish_timestamp);
1189 if (r < 0)
1190 return r;
1191
1192 lookup_paths_reduce(&m->lookup_paths);
1193 manager_build_unit_path_cache(m);
1194
1195 /* If we will deserialize make sure that during enumeration
1196 * this is already known, so we increase the counter here
1197 * already */
1198 if (serialization)
1199 m->n_reloading++;
1200
1201 /* First, enumerate what we can from all config files */
1202 dual_timestamp_get(&m->units_load_start_timestamp);
1203 manager_enumerate(m);
1204 dual_timestamp_get(&m->units_load_finish_timestamp);
1205
1206 /* Second, deserialize if there is something to deserialize */
1207 if (serialization)
1208 r = manager_deserialize(m, serialization, fds);
1209
1210 /* Any fds left? Find some unit which wants them. This is
1211 * useful to allow container managers to pass some file
1212 * descriptors to us pre-initialized. This enables
1213 * socket-based activation of entire containers. */
1214 manager_distribute_fds(m, fds);
1215
1216 /* We might have deserialized the notify fd, but if we didn't
1217 * then let's create the bus now */
1218 q = manager_setup_notify(m);
1219 if (q < 0 && r == 0)
1220 r = q;
1221
1222 q = manager_setup_cgroups_agent(m);
1223 if (q < 0 && r == 0)
1224 r = q;
1225
1226 /* We might have deserialized the kdbus control fd, but if we
1227 * didn't, then let's create the bus now. */
1228 manager_setup_kdbus(m);
1229 manager_connect_bus(m, !!serialization);
1230 bus_track_coldplug(m, &m->subscribed, &m->deserialized_subscribed);
1231
1232 /* Third, fire things up! */
1233 manager_coldplug(m);
1234
1235 if (serialization) {
1236 assert(m->n_reloading > 0);
1237 m->n_reloading--;
1238
1239 /* Let's wait for the UnitNew/JobNew messages being
1240 * sent, before we notify that the reload is
1241 * finished */
1242 m->send_reloading_done = true;
1243 }
1244
1245 return r;
1246 }
1247
1248 int manager_add_job(Manager *m, JobType type, Unit *unit, JobMode mode, sd_bus_error *e, Job **_ret) {
1249 int r;
1250 Transaction *tr;
1251
1252 assert(m);
1253 assert(type < _JOB_TYPE_MAX);
1254 assert(unit);
1255 assert(mode < _JOB_MODE_MAX);
1256
1257 if (mode == JOB_ISOLATE && type != JOB_START)
1258 return sd_bus_error_setf(e, SD_BUS_ERROR_INVALID_ARGS, "Isolate is only valid for start.");
1259
1260 if (mode == JOB_ISOLATE && !unit->allow_isolate)
1261 return sd_bus_error_setf(e, BUS_ERROR_NO_ISOLATION, "Operation refused, unit may not be isolated.");
1262
1263 log_unit_debug(unit, "Trying to enqueue job %s/%s/%s", unit->id, job_type_to_string(type), job_mode_to_string(mode));
1264
1265 type = job_type_collapse(type, unit);
1266
1267 tr = transaction_new(mode == JOB_REPLACE_IRREVERSIBLY);
1268 if (!tr)
1269 return -ENOMEM;
1270
1271 r = transaction_add_job_and_dependencies(tr, type, unit, NULL, true, false,
1272 mode == JOB_IGNORE_DEPENDENCIES || mode == JOB_IGNORE_REQUIREMENTS,
1273 mode == JOB_IGNORE_DEPENDENCIES, e);
1274 if (r < 0)
1275 goto tr_abort;
1276
1277 if (mode == JOB_ISOLATE) {
1278 r = transaction_add_isolate_jobs(tr, m);
1279 if (r < 0)
1280 goto tr_abort;
1281 }
1282
1283 r = transaction_activate(tr, m, mode, e);
1284 if (r < 0)
1285 goto tr_abort;
1286
1287 log_unit_debug(unit,
1288 "Enqueued job %s/%s as %u", unit->id,
1289 job_type_to_string(type), (unsigned) tr->anchor_job->id);
1290
1291 if (_ret)
1292 *_ret = tr->anchor_job;
1293
1294 transaction_free(tr);
1295 return 0;
1296
1297 tr_abort:
1298 transaction_abort(tr);
1299 transaction_free(tr);
1300 return r;
1301 }
1302
1303 int manager_add_job_by_name(Manager *m, JobType type, const char *name, JobMode mode, sd_bus_error *e, Job **ret) {
1304 Unit *unit;
1305 int r;
1306
1307 assert(m);
1308 assert(type < _JOB_TYPE_MAX);
1309 assert(name);
1310 assert(mode < _JOB_MODE_MAX);
1311
1312 r = manager_load_unit(m, name, NULL, NULL, &unit);
1313 if (r < 0)
1314 return r;
1315
1316 return manager_add_job(m, type, unit, mode, e, ret);
1317 }
1318
1319 int manager_add_job_by_name_and_warn(Manager *m, JobType type, const char *name, JobMode mode, Job **ret) {
1320 _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL;
1321 int r;
1322
1323 assert(m);
1324 assert(type < _JOB_TYPE_MAX);
1325 assert(name);
1326 assert(mode < _JOB_MODE_MAX);
1327
1328 r = manager_add_job_by_name(m, type, name, mode, &error, ret);
1329 if (r < 0)
1330 return log_warning_errno(r, "Failed to enqueue %s job for %s: %s", job_mode_to_string(mode), name, bus_error_message(&error, r));
1331
1332 return r;
1333 }
1334
1335 Job *manager_get_job(Manager *m, uint32_t id) {
1336 assert(m);
1337
1338 return hashmap_get(m->jobs, UINT32_TO_PTR(id));
1339 }
1340
1341 Unit *manager_get_unit(Manager *m, const char *name) {
1342 assert(m);
1343 assert(name);
1344
1345 return hashmap_get(m->units, name);
1346 }
1347
1348 unsigned manager_dispatch_load_queue(Manager *m) {
1349 Unit *u;
1350 unsigned n = 0;
1351
1352 assert(m);
1353
1354 /* Make sure we are not run recursively */
1355 if (m->dispatching_load_queue)
1356 return 0;
1357
1358 m->dispatching_load_queue = true;
1359
1360 /* Dispatches the load queue. Takes a unit from the queue and
1361 * tries to load its data until the queue is empty */
1362
1363 while ((u = m->load_queue)) {
1364 assert(u->in_load_queue);
1365
1366 unit_load(u);
1367 n++;
1368 }
1369
1370 m->dispatching_load_queue = false;
1371 return n;
1372 }
1373
1374 int manager_load_unit_prepare(
1375 Manager *m,
1376 const char *name,
1377 const char *path,
1378 sd_bus_error *e,
1379 Unit **_ret) {
1380
1381 Unit *ret;
1382 UnitType t;
1383 int r;
1384
1385 assert(m);
1386 assert(name || path);
1387
1388 /* This will prepare the unit for loading, but not actually
1389 * load anything from disk. */
1390
1391 if (path && !is_path(path))
1392 return sd_bus_error_setf(e, SD_BUS_ERROR_INVALID_ARGS, "Path %s is not absolute.", path);
1393
1394 if (!name)
1395 name = basename(path);
1396
1397 t = unit_name_to_type(name);
1398
1399 if (t == _UNIT_TYPE_INVALID || !unit_name_is_valid(name, UNIT_NAME_PLAIN|UNIT_NAME_INSTANCE)) {
1400 if (unit_name_is_valid(name, UNIT_NAME_TEMPLATE))
1401 return sd_bus_error_setf(e, SD_BUS_ERROR_INVALID_ARGS, "Unit name %s is missing the instance name.", name);
1402
1403 return sd_bus_error_setf(e, SD_BUS_ERROR_INVALID_ARGS, "Unit name %s is not valid.", name);
1404 }
1405
1406 ret = manager_get_unit(m, name);
1407 if (ret) {
1408 *_ret = ret;
1409 return 1;
1410 }
1411
1412 ret = unit_new(m, unit_vtable[t]->object_size);
1413 if (!ret)
1414 return -ENOMEM;
1415
1416 if (path) {
1417 ret->fragment_path = strdup(path);
1418 if (!ret->fragment_path) {
1419 unit_free(ret);
1420 return -ENOMEM;
1421 }
1422 }
1423
1424 r = unit_add_name(ret, name);
1425 if (r < 0) {
1426 unit_free(ret);
1427 return r;
1428 }
1429
1430 unit_add_to_load_queue(ret);
1431 unit_add_to_dbus_queue(ret);
1432 unit_add_to_gc_queue(ret);
1433
1434 if (_ret)
1435 *_ret = ret;
1436
1437 return 0;
1438 }
1439
1440 int manager_load_unit(
1441 Manager *m,
1442 const char *name,
1443 const char *path,
1444 sd_bus_error *e,
1445 Unit **_ret) {
1446
1447 int r;
1448
1449 assert(m);
1450
1451 /* This will load the service information files, but not actually
1452 * start any services or anything. */
1453
1454 r = manager_load_unit_prepare(m, name, path, e, _ret);
1455 if (r != 0)
1456 return r;
1457
1458 manager_dispatch_load_queue(m);
1459
1460 if (_ret)
1461 *_ret = unit_follow_merge(*_ret);
1462
1463 return 0;
1464 }
1465
1466 void manager_dump_jobs(Manager *s, FILE *f, const char *prefix) {
1467 Iterator i;
1468 Job *j;
1469
1470 assert(s);
1471 assert(f);
1472
1473 HASHMAP_FOREACH(j, s->jobs, i)
1474 job_dump(j, f, prefix);
1475 }
1476
1477 void manager_dump_units(Manager *s, FILE *f, const char *prefix) {
1478 Iterator i;
1479 Unit *u;
1480 const char *t;
1481
1482 assert(s);
1483 assert(f);
1484
1485 HASHMAP_FOREACH_KEY(u, t, s->units, i)
1486 if (u->id == t)
1487 unit_dump(u, f, prefix);
1488 }
1489
1490 void manager_clear_jobs(Manager *m) {
1491 Job *j;
1492
1493 assert(m);
1494
1495 while ((j = hashmap_first(m->jobs)))
1496 /* No need to recurse. We're cancelling all jobs. */
1497 job_finish_and_invalidate(j, JOB_CANCELED, false);
1498 }
1499
1500 static int manager_dispatch_run_queue(sd_event_source *source, void *userdata) {
1501 Manager *m = userdata;
1502 Job *j;
1503
1504 assert(source);
1505 assert(m);
1506
1507 while ((j = m->run_queue)) {
1508 assert(j->installed);
1509 assert(j->in_run_queue);
1510
1511 job_run_and_invalidate(j);
1512 }
1513
1514 if (m->n_running_jobs > 0)
1515 manager_watch_jobs_in_progress(m);
1516
1517 if (m->n_on_console > 0)
1518 manager_watch_idle_pipe(m);
1519
1520 return 1;
1521 }
1522
1523 static unsigned manager_dispatch_dbus_queue(Manager *m) {
1524 Job *j;
1525 Unit *u;
1526 unsigned n = 0;
1527
1528 assert(m);
1529
1530 if (m->dispatching_dbus_queue)
1531 return 0;
1532
1533 m->dispatching_dbus_queue = true;
1534
1535 while ((u = m->dbus_unit_queue)) {
1536 assert(u->in_dbus_queue);
1537
1538 bus_unit_send_change_signal(u);
1539 n++;
1540 }
1541
1542 while ((j = m->dbus_job_queue)) {
1543 assert(j->in_dbus_queue);
1544
1545 bus_job_send_change_signal(j);
1546 n++;
1547 }
1548
1549 m->dispatching_dbus_queue = false;
1550
1551 if (m->send_reloading_done) {
1552 m->send_reloading_done = false;
1553
1554 bus_manager_send_reloading(m, false);
1555 }
1556
1557 if (m->queued_message)
1558 bus_send_queued_message(m);
1559
1560 return n;
1561 }
1562
1563 static int manager_dispatch_cgroups_agent_fd(sd_event_source *source, int fd, uint32_t revents, void *userdata) {
1564 Manager *m = userdata;
1565 char buf[PATH_MAX+1];
1566 ssize_t n;
1567
1568 n = recv(fd, buf, sizeof(buf), 0);
1569 if (n < 0)
1570 return log_error_errno(errno, "Failed to read cgroups agent message: %m");
1571 if (n == 0) {
1572 log_error("Got zero-length cgroups agent message, ignoring.");
1573 return 0;
1574 }
1575 if ((size_t) n >= sizeof(buf)) {
1576 log_error("Got overly long cgroups agent message, ignoring.");
1577 return 0;
1578 }
1579
1580 if (memchr(buf, 0, n)) {
1581 log_error("Got cgroups agent message with embedded NUL byte, ignoring.");
1582 return 0;
1583 }
1584 buf[n] = 0;
1585
1586 manager_notify_cgroup_empty(m, buf);
1587 bus_forward_agent_released(m, buf);
1588
1589 return 0;
1590 }
1591
1592 static void manager_invoke_notify_message(Manager *m, Unit *u, pid_t pid, const char *buf, size_t n, FDSet *fds) {
1593 _cleanup_strv_free_ char **tags = NULL;
1594
1595 assert(m);
1596 assert(u);
1597 assert(buf);
1598 assert(n > 0);
1599
1600 tags = strv_split(buf, "\n\r");
1601 if (!tags) {
1602 log_oom();
1603 return;
1604 }
1605
1606 if (UNIT_VTABLE(u)->notify_message)
1607 UNIT_VTABLE(u)->notify_message(u, pid, tags, fds);
1608 else
1609 log_unit_debug(u, "Got notification message for unit. Ignoring.");
1610 }
1611
1612 static int manager_dispatch_notify_fd(sd_event_source *source, int fd, uint32_t revents, void *userdata) {
1613 _cleanup_fdset_free_ FDSet *fds = NULL;
1614 Manager *m = userdata;
1615
1616 char buf[NOTIFY_BUFFER_MAX+1];
1617 struct iovec iovec = {
1618 .iov_base = buf,
1619 .iov_len = sizeof(buf)-1,
1620 };
1621 union {
1622 struct cmsghdr cmsghdr;
1623 uint8_t buf[CMSG_SPACE(sizeof(struct ucred)) +
1624 CMSG_SPACE(sizeof(int) * NOTIFY_FD_MAX)];
1625 } control = {};
1626 struct msghdr msghdr = {
1627 .msg_iov = &iovec,
1628 .msg_iovlen = 1,
1629 .msg_control = &control,
1630 .msg_controllen = sizeof(control),
1631 };
1632
1633 struct cmsghdr *cmsg;
1634 struct ucred *ucred = NULL;
1635 bool found = false;
1636 Unit *u1, *u2, *u3;
1637 int r, *fd_array = NULL;
1638 unsigned n_fds = 0;
1639 ssize_t n;
1640
1641 assert(m);
1642 assert(m->notify_fd == fd);
1643
1644 if (revents != EPOLLIN) {
1645 log_warning("Got unexpected poll event for notify fd.");
1646 return 0;
1647 }
1648
1649 n = recvmsg(m->notify_fd, &msghdr, MSG_DONTWAIT|MSG_CMSG_CLOEXEC);
1650 if (n < 0) {
1651 if (errno == EAGAIN || errno == EINTR)
1652 return 0;
1653
1654 return -errno;
1655 }
1656
1657 CMSG_FOREACH(cmsg, &msghdr) {
1658 if (cmsg->cmsg_level == SOL_SOCKET && cmsg->cmsg_type == SCM_RIGHTS) {
1659
1660 fd_array = (int*) CMSG_DATA(cmsg);
1661 n_fds = (cmsg->cmsg_len - CMSG_LEN(0)) / sizeof(int);
1662
1663 } else if (cmsg->cmsg_level == SOL_SOCKET &&
1664 cmsg->cmsg_type == SCM_CREDENTIALS &&
1665 cmsg->cmsg_len == CMSG_LEN(sizeof(struct ucred))) {
1666
1667 ucred = (struct ucred*) CMSG_DATA(cmsg);
1668 }
1669 }
1670
1671 if (n_fds > 0) {
1672 assert(fd_array);
1673
1674 r = fdset_new_array(&fds, fd_array, n_fds);
1675 if (r < 0) {
1676 close_many(fd_array, n_fds);
1677 return log_oom();
1678 }
1679 }
1680
1681 if (!ucred || ucred->pid <= 0) {
1682 log_warning("Received notify message without valid credentials. Ignoring.");
1683 return 0;
1684 }
1685
1686 if ((size_t) n >= sizeof(buf)) {
1687 log_warning("Received notify message exceeded maximum size. Ignoring.");
1688 return 0;
1689 }
1690
1691 buf[n] = 0;
1692
1693 /* Notify every unit that might be interested, but try
1694 * to avoid notifying the same one multiple times. */
1695 u1 = manager_get_unit_by_pid_cgroup(m, ucred->pid);
1696 if (u1) {
1697 manager_invoke_notify_message(m, u1, ucred->pid, buf, n, fds);
1698 found = true;
1699 }
1700
1701 u2 = hashmap_get(m->watch_pids1, PID_TO_PTR(ucred->pid));
1702 if (u2 && u2 != u1) {
1703 manager_invoke_notify_message(m, u2, ucred->pid, buf, n, fds);
1704 found = true;
1705 }
1706
1707 u3 = hashmap_get(m->watch_pids2, PID_TO_PTR(ucred->pid));
1708 if (u3 && u3 != u2 && u3 != u1) {
1709 manager_invoke_notify_message(m, u3, ucred->pid, buf, n, fds);
1710 found = true;
1711 }
1712
1713 if (!found)
1714 log_warning("Cannot find unit for notify message of PID "PID_FMT".", ucred->pid);
1715
1716 if (fdset_size(fds) > 0)
1717 log_warning("Got auxiliary fds with notification message, closing all.");
1718
1719 return 0;
1720 }
1721
1722 static void invoke_sigchld_event(Manager *m, Unit *u, const siginfo_t *si) {
1723 assert(m);
1724 assert(u);
1725 assert(si);
1726
1727 log_unit_debug(u, "Child "PID_FMT" belongs to %s", si->si_pid, u->id);
1728
1729 unit_unwatch_pid(u, si->si_pid);
1730
1731 if (UNIT_VTABLE(u)->sigchld_event)
1732 UNIT_VTABLE(u)->sigchld_event(u, si->si_pid, si->si_code, si->si_status);
1733 }
1734
1735 static int manager_dispatch_sigchld(Manager *m) {
1736 assert(m);
1737
1738 for (;;) {
1739 siginfo_t si = {};
1740
1741 /* First we call waitd() for a PID and do not reap the
1742 * zombie. That way we can still access /proc/$PID for
1743 * it while it is a zombie. */
1744 if (waitid(P_ALL, 0, &si, WEXITED|WNOHANG|WNOWAIT) < 0) {
1745
1746 if (errno == ECHILD)
1747 break;
1748
1749 if (errno == EINTR)
1750 continue;
1751
1752 return -errno;
1753 }
1754
1755 if (si.si_pid <= 0)
1756 break;
1757
1758 if (si.si_code == CLD_EXITED || si.si_code == CLD_KILLED || si.si_code == CLD_DUMPED) {
1759 _cleanup_free_ char *name = NULL;
1760 Unit *u1, *u2, *u3;
1761
1762 get_process_comm(si.si_pid, &name);
1763
1764 log_debug("Child "PID_FMT" (%s) died (code=%s, status=%i/%s)",
1765 si.si_pid, strna(name),
1766 sigchld_code_to_string(si.si_code),
1767 si.si_status,
1768 strna(si.si_code == CLD_EXITED
1769 ? exit_status_to_string(si.si_status, EXIT_STATUS_FULL)
1770 : signal_to_string(si.si_status)));
1771
1772 /* And now figure out the unit this belongs
1773 * to, it might be multiple... */
1774 u1 = manager_get_unit_by_pid_cgroup(m, si.si_pid);
1775 if (u1)
1776 invoke_sigchld_event(m, u1, &si);
1777 u2 = hashmap_get(m->watch_pids1, PID_TO_PTR(si.si_pid));
1778 if (u2 && u2 != u1)
1779 invoke_sigchld_event(m, u2, &si);
1780 u3 = hashmap_get(m->watch_pids2, PID_TO_PTR(si.si_pid));
1781 if (u3 && u3 != u2 && u3 != u1)
1782 invoke_sigchld_event(m, u3, &si);
1783 }
1784
1785 /* And now, we actually reap the zombie. */
1786 if (waitid(P_PID, si.si_pid, &si, WEXITED) < 0) {
1787 if (errno == EINTR)
1788 continue;
1789
1790 return -errno;
1791 }
1792 }
1793
1794 return 0;
1795 }
1796
1797 static int manager_start_target(Manager *m, const char *name, JobMode mode) {
1798 _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL;
1799 int r;
1800
1801 log_debug("Activating special unit %s", name);
1802
1803 r = manager_add_job_by_name(m, JOB_START, name, mode, &error, NULL);
1804 if (r < 0)
1805 log_error("Failed to enqueue %s job: %s", name, bus_error_message(&error, r));
1806
1807 return r;
1808 }
1809
1810 static int manager_dispatch_signal_fd(sd_event_source *source, int fd, uint32_t revents, void *userdata) {
1811 Manager *m = userdata;
1812 ssize_t n;
1813 struct signalfd_siginfo sfsi;
1814 bool sigchld = false;
1815 int r;
1816
1817 assert(m);
1818 assert(m->signal_fd == fd);
1819
1820 if (revents != EPOLLIN) {
1821 log_warning("Got unexpected events from signal file descriptor.");
1822 return 0;
1823 }
1824
1825 for (;;) {
1826 n = read(m->signal_fd, &sfsi, sizeof(sfsi));
1827 if (n != sizeof(sfsi)) {
1828
1829 if (n >= 0)
1830 return -EIO;
1831
1832 if (errno == EINTR || errno == EAGAIN)
1833 break;
1834
1835 return -errno;
1836 }
1837
1838 log_received_signal(sfsi.ssi_signo == SIGCHLD ||
1839 (sfsi.ssi_signo == SIGTERM && MANAGER_IS_USER(m))
1840 ? LOG_DEBUG : LOG_INFO,
1841 &sfsi);
1842
1843 switch (sfsi.ssi_signo) {
1844
1845 case SIGCHLD:
1846 sigchld = true;
1847 break;
1848
1849 case SIGTERM:
1850 if (MANAGER_IS_SYSTEM(m)) {
1851 /* This is for compatibility with the
1852 * original sysvinit */
1853 m->exit_code = MANAGER_REEXECUTE;
1854 break;
1855 }
1856
1857 /* Fall through */
1858
1859 case SIGINT:
1860 if (MANAGER_IS_SYSTEM(m)) {
1861
1862 /* If the user presses C-A-D more than
1863 * 7 times within 2s, we reboot
1864 * immediately. */
1865
1866 if (ratelimit_test(&m->ctrl_alt_del_ratelimit))
1867 manager_start_target(m, SPECIAL_CTRL_ALT_DEL_TARGET, JOB_REPLACE_IRREVERSIBLY);
1868 else {
1869 log_notice("Ctrl-Alt-Del was pressed more than 7 times within 2s, rebooting immediately.");
1870 status_printf(NULL, true, false, "Ctrl-Alt-Del was pressed more than 7 times within 2s, rebooting immediately.");
1871 m->exit_code = MANAGER_REBOOT;
1872 }
1873
1874 break;
1875 }
1876
1877 /* Run the exit target if there is one, if not, just exit. */
1878 if (manager_start_target(m, SPECIAL_EXIT_TARGET, JOB_REPLACE) < 0) {
1879 m->exit_code = MANAGER_EXIT;
1880 return 0;
1881 }
1882
1883 break;
1884
1885 case SIGWINCH:
1886 if (MANAGER_IS_SYSTEM(m))
1887 manager_start_target(m, SPECIAL_KBREQUEST_TARGET, JOB_REPLACE);
1888
1889 /* This is a nop on non-init */
1890 break;
1891
1892 case SIGPWR:
1893 if (MANAGER_IS_SYSTEM(m))
1894 manager_start_target(m, SPECIAL_SIGPWR_TARGET, JOB_REPLACE);
1895
1896 /* This is a nop on non-init */
1897 break;
1898
1899 case SIGUSR1: {
1900 Unit *u;
1901
1902 u = manager_get_unit(m, SPECIAL_DBUS_SERVICE);
1903
1904 if (!u || UNIT_IS_ACTIVE_OR_RELOADING(unit_active_state(u))) {
1905 log_info("Trying to reconnect to bus...");
1906 bus_init(m, true);
1907 }
1908
1909 if (!u || !UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(u))) {
1910 log_info("Loading D-Bus service...");
1911 manager_start_target(m, SPECIAL_DBUS_SERVICE, JOB_REPLACE);
1912 }
1913
1914 break;
1915 }
1916
1917 case SIGUSR2: {
1918 _cleanup_free_ char *dump = NULL;
1919 _cleanup_fclose_ FILE *f = NULL;
1920 size_t size;
1921
1922 f = open_memstream(&dump, &size);
1923 if (!f) {
1924 log_warning_errno(errno, "Failed to allocate memory stream: %m");
1925 break;
1926 }
1927
1928 manager_dump_units(m, f, "\t");
1929 manager_dump_jobs(m, f, "\t");
1930
1931 r = fflush_and_check(f);
1932 if (r < 0) {
1933 log_warning_errno(r, "Failed to write status stream: %m");
1934 break;
1935 }
1936
1937 log_dump(LOG_INFO, dump);
1938 break;
1939 }
1940
1941 case SIGHUP:
1942 m->exit_code = MANAGER_RELOAD;
1943 break;
1944
1945 default: {
1946
1947 /* Starting SIGRTMIN+0 */
1948 static const char * const target_table[] = {
1949 [0] = SPECIAL_DEFAULT_TARGET,
1950 [1] = SPECIAL_RESCUE_TARGET,
1951 [2] = SPECIAL_EMERGENCY_TARGET,
1952 [3] = SPECIAL_HALT_TARGET,
1953 [4] = SPECIAL_POWEROFF_TARGET,
1954 [5] = SPECIAL_REBOOT_TARGET,
1955 [6] = SPECIAL_KEXEC_TARGET
1956 };
1957
1958 /* Starting SIGRTMIN+13, so that target halt and system halt are 10 apart */
1959 static const ManagerExitCode code_table[] = {
1960 [0] = MANAGER_HALT,
1961 [1] = MANAGER_POWEROFF,
1962 [2] = MANAGER_REBOOT,
1963 [3] = MANAGER_KEXEC
1964 };
1965
1966 if ((int) sfsi.ssi_signo >= SIGRTMIN+0 &&
1967 (int) sfsi.ssi_signo < SIGRTMIN+(int) ELEMENTSOF(target_table)) {
1968 int idx = (int) sfsi.ssi_signo - SIGRTMIN;
1969 manager_start_target(m, target_table[idx],
1970 (idx == 1 || idx == 2) ? JOB_ISOLATE : JOB_REPLACE);
1971 break;
1972 }
1973
1974 if ((int) sfsi.ssi_signo >= SIGRTMIN+13 &&
1975 (int) sfsi.ssi_signo < SIGRTMIN+13+(int) ELEMENTSOF(code_table)) {
1976 m->exit_code = code_table[sfsi.ssi_signo - SIGRTMIN - 13];
1977 break;
1978 }
1979
1980 switch (sfsi.ssi_signo - SIGRTMIN) {
1981
1982 case 20:
1983 manager_set_show_status(m, SHOW_STATUS_YES);
1984 break;
1985
1986 case 21:
1987 manager_set_show_status(m, SHOW_STATUS_NO);
1988 break;
1989
1990 case 22:
1991 log_set_max_level(LOG_DEBUG);
1992 log_info("Setting log level to debug.");
1993 break;
1994
1995 case 23:
1996 log_set_max_level(LOG_INFO);
1997 log_info("Setting log level to info.");
1998 break;
1999
2000 case 24:
2001 if (MANAGER_IS_USER(m)) {
2002 m->exit_code = MANAGER_EXIT;
2003 return 0;
2004 }
2005
2006 /* This is a nop on init */
2007 break;
2008
2009 case 26:
2010 case 29: /* compatibility: used to be mapped to LOG_TARGET_SYSLOG_OR_KMSG */
2011 log_set_target(LOG_TARGET_JOURNAL_OR_KMSG);
2012 log_notice("Setting log target to journal-or-kmsg.");
2013 break;
2014
2015 case 27:
2016 log_set_target(LOG_TARGET_CONSOLE);
2017 log_notice("Setting log target to console.");
2018 break;
2019
2020 case 28:
2021 log_set_target(LOG_TARGET_KMSG);
2022 log_notice("Setting log target to kmsg.");
2023 break;
2024
2025 default:
2026 log_warning("Got unhandled signal <%s>.", signal_to_string(sfsi.ssi_signo));
2027 }
2028 }
2029 }
2030 }
2031
2032 if (sigchld)
2033 manager_dispatch_sigchld(m);
2034
2035 return 0;
2036 }
2037
2038 static int manager_dispatch_time_change_fd(sd_event_source *source, int fd, uint32_t revents, void *userdata) {
2039 Manager *m = userdata;
2040 Iterator i;
2041 Unit *u;
2042
2043 assert(m);
2044 assert(m->time_change_fd == fd);
2045
2046 log_struct(LOG_INFO,
2047 LOG_MESSAGE_ID(SD_MESSAGE_TIME_CHANGE),
2048 LOG_MESSAGE("Time has been changed"),
2049 NULL);
2050
2051 /* Restart the watch */
2052 m->time_change_event_source = sd_event_source_unref(m->time_change_event_source);
2053 m->time_change_fd = safe_close(m->time_change_fd);
2054
2055 manager_setup_time_change(m);
2056
2057 HASHMAP_FOREACH(u, m->units, i)
2058 if (UNIT_VTABLE(u)->time_change)
2059 UNIT_VTABLE(u)->time_change(u);
2060
2061 return 0;
2062 }
2063
2064 static int manager_dispatch_idle_pipe_fd(sd_event_source *source, int fd, uint32_t revents, void *userdata) {
2065 Manager *m = userdata;
2066
2067 assert(m);
2068 assert(m->idle_pipe[2] == fd);
2069
2070 m->no_console_output = m->n_on_console > 0;
2071
2072 manager_close_idle_pipe(m);
2073
2074 return 0;
2075 }
2076
2077 static int manager_dispatch_jobs_in_progress(sd_event_source *source, usec_t usec, void *userdata) {
2078 Manager *m = userdata;
2079 int r;
2080 uint64_t next;
2081
2082 assert(m);
2083 assert(source);
2084
2085 manager_print_jobs_in_progress(m);
2086
2087 next = now(CLOCK_MONOTONIC) + JOBS_IN_PROGRESS_PERIOD_USEC;
2088 r = sd_event_source_set_time(source, next);
2089 if (r < 0)
2090 return r;
2091
2092 return sd_event_source_set_enabled(source, SD_EVENT_ONESHOT);
2093 }
2094
2095 int manager_loop(Manager *m) {
2096 int r;
2097
2098 RATELIMIT_DEFINE(rl, 1*USEC_PER_SEC, 50000);
2099
2100 assert(m);
2101 m->exit_code = MANAGER_OK;
2102
2103 /* Release the path cache */
2104 m->unit_path_cache = set_free_free(m->unit_path_cache);
2105
2106 manager_check_finished(m);
2107
2108 /* There might still be some zombies hanging around from
2109 * before we were exec()'ed. Let's reap them. */
2110 r = manager_dispatch_sigchld(m);
2111 if (r < 0)
2112 return r;
2113
2114 while (m->exit_code == MANAGER_OK) {
2115 usec_t wait_usec;
2116
2117 if (m->runtime_watchdog > 0 && m->runtime_watchdog != USEC_INFINITY && MANAGER_IS_SYSTEM(m))
2118 watchdog_ping();
2119
2120 if (!ratelimit_test(&rl)) {
2121 /* Yay, something is going seriously wrong, pause a little */
2122 log_warning("Looping too fast. Throttling execution a little.");
2123 sleep(1);
2124 }
2125
2126 if (manager_dispatch_load_queue(m) > 0)
2127 continue;
2128
2129 if (manager_dispatch_gc_queue(m) > 0)
2130 continue;
2131
2132 if (manager_dispatch_cleanup_queue(m) > 0)
2133 continue;
2134
2135 if (manager_dispatch_cgroup_queue(m) > 0)
2136 continue;
2137
2138 if (manager_dispatch_dbus_queue(m) > 0)
2139 continue;
2140
2141 /* Sleep for half the watchdog time */
2142 if (m->runtime_watchdog > 0 && m->runtime_watchdog != USEC_INFINITY && MANAGER_IS_SYSTEM(m)) {
2143 wait_usec = m->runtime_watchdog / 2;
2144 if (wait_usec <= 0)
2145 wait_usec = 1;
2146 } else
2147 wait_usec = USEC_INFINITY;
2148
2149 r = sd_event_run(m->event, wait_usec);
2150 if (r < 0)
2151 return log_error_errno(r, "Failed to run event loop: %m");
2152 }
2153
2154 return m->exit_code;
2155 }
2156
2157 int manager_load_unit_from_dbus_path(Manager *m, const char *s, sd_bus_error *e, Unit **_u) {
2158 _cleanup_free_ char *n = NULL;
2159 Unit *u;
2160 int r;
2161
2162 assert(m);
2163 assert(s);
2164 assert(_u);
2165
2166 r = unit_name_from_dbus_path(s, &n);
2167 if (r < 0)
2168 return r;
2169
2170 r = manager_load_unit(m, n, NULL, e, &u);
2171 if (r < 0)
2172 return r;
2173
2174 *_u = u;
2175
2176 return 0;
2177 }
2178
2179 int manager_get_job_from_dbus_path(Manager *m, const char *s, Job **_j) {
2180 const char *p;
2181 unsigned id;
2182 Job *j;
2183 int r;
2184
2185 assert(m);
2186 assert(s);
2187 assert(_j);
2188
2189 p = startswith(s, "/org/freedesktop/systemd1/job/");
2190 if (!p)
2191 return -EINVAL;
2192
2193 r = safe_atou(p, &id);
2194 if (r < 0)
2195 return r;
2196
2197 j = manager_get_job(m, id);
2198 if (!j)
2199 return -ENOENT;
2200
2201 *_j = j;
2202
2203 return 0;
2204 }
2205
2206 void manager_send_unit_audit(Manager *m, Unit *u, int type, bool success) {
2207
2208 #ifdef HAVE_AUDIT
2209 _cleanup_free_ char *p = NULL;
2210 const char *msg;
2211 int audit_fd, r;
2212
2213 if (!MANAGER_IS_SYSTEM(m))
2214 return;
2215
2216 audit_fd = get_audit_fd();
2217 if (audit_fd < 0)
2218 return;
2219
2220 /* Don't generate audit events if the service was already
2221 * started and we're just deserializing */
2222 if (MANAGER_IS_RELOADING(m))
2223 return;
2224
2225 if (u->type != UNIT_SERVICE)
2226 return;
2227
2228 r = unit_name_to_prefix_and_instance(u->id, &p);
2229 if (r < 0) {
2230 log_error_errno(r, "Failed to extract prefix and instance of unit name: %m");
2231 return;
2232 }
2233
2234 msg = strjoina("unit=", p);
2235 if (audit_log_user_comm_message(audit_fd, type, msg, "systemd", NULL, NULL, NULL, success) < 0) {
2236 if (errno == EPERM)
2237 /* We aren't allowed to send audit messages?
2238 * Then let's not retry again. */
2239 close_audit_fd();
2240 else
2241 log_warning_errno(errno, "Failed to send audit message: %m");
2242 }
2243 #endif
2244
2245 }
2246
2247 void manager_send_unit_plymouth(Manager *m, Unit *u) {
2248 union sockaddr_union sa = PLYMOUTH_SOCKET;
2249
2250 int n = 0;
2251 _cleanup_free_ char *message = NULL;
2252 _cleanup_close_ int fd = -1;
2253
2254 /* Don't generate plymouth events if the service was already
2255 * started and we're just deserializing */
2256 if (MANAGER_IS_RELOADING(m))
2257 return;
2258
2259 if (!MANAGER_IS_SYSTEM(m))
2260 return;
2261
2262 if (detect_container() > 0)
2263 return;
2264
2265 if (u->type != UNIT_SERVICE &&
2266 u->type != UNIT_MOUNT &&
2267 u->type != UNIT_SWAP)
2268 return;
2269
2270 /* We set SOCK_NONBLOCK here so that we rather drop the
2271 * message then wait for plymouth */
2272 fd = socket(AF_UNIX, SOCK_STREAM|SOCK_CLOEXEC|SOCK_NONBLOCK, 0);
2273 if (fd < 0) {
2274 log_error_errno(errno, "socket() failed: %m");
2275 return;
2276 }
2277
2278 if (connect(fd, &sa.sa, offsetof(struct sockaddr_un, sun_path) + 1 + strlen(sa.un.sun_path+1)) < 0) {
2279
2280 if (!IN_SET(errno, EPIPE, EAGAIN, ENOENT, ECONNREFUSED, ECONNRESET, ECONNABORTED))
2281 log_error_errno(errno, "connect() failed: %m");
2282 return;
2283 }
2284
2285 if (asprintf(&message, "U\002%c%s%n", (int) (strlen(u->id) + 1), u->id, &n) < 0) {
2286 log_oom();
2287 return;
2288 }
2289
2290 errno = 0;
2291 if (write(fd, message, n + 1) != n + 1)
2292 if (!IN_SET(errno, EPIPE, EAGAIN, ENOENT, ECONNREFUSED, ECONNRESET, ECONNABORTED))
2293 log_error_errno(errno, "Failed to write Plymouth message: %m");
2294 }
2295
2296 int manager_open_serialization(Manager *m, FILE **_f) {
2297 const char *path;
2298 int fd = -1;
2299 FILE *f;
2300
2301 assert(_f);
2302
2303 path = MANAGER_IS_SYSTEM(m) ? "/run/systemd" : "/tmp";
2304 fd = open_tmpfile_unlinkable(path, O_RDWR|O_CLOEXEC);
2305 if (fd < 0)
2306 return -errno;
2307
2308 log_debug("Serializing state to %s", path);
2309
2310 f = fdopen(fd, "w+");
2311 if (!f) {
2312 safe_close(fd);
2313 return -errno;
2314 }
2315
2316 *_f = f;
2317
2318 return 0;
2319 }
2320
2321 int manager_serialize(Manager *m, FILE *f, FDSet *fds, bool switching_root) {
2322 Iterator i;
2323 Unit *u;
2324 const char *t;
2325 char **e;
2326 int r;
2327
2328 assert(m);
2329 assert(f);
2330 assert(fds);
2331
2332 m->n_reloading++;
2333
2334 fprintf(f, "current-job-id=%"PRIu32"\n", m->current_job_id);
2335 fprintf(f, "taint-usr=%s\n", yes_no(m->taint_usr));
2336 fprintf(f, "n-installed-jobs=%u\n", m->n_installed_jobs);
2337 fprintf(f, "n-failed-jobs=%u\n", m->n_failed_jobs);
2338
2339 dual_timestamp_serialize(f, "firmware-timestamp", &m->firmware_timestamp);
2340 dual_timestamp_serialize(f, "loader-timestamp", &m->loader_timestamp);
2341 dual_timestamp_serialize(f, "kernel-timestamp", &m->kernel_timestamp);
2342 dual_timestamp_serialize(f, "initrd-timestamp", &m->initrd_timestamp);
2343
2344 if (!in_initrd()) {
2345 dual_timestamp_serialize(f, "userspace-timestamp", &m->userspace_timestamp);
2346 dual_timestamp_serialize(f, "finish-timestamp", &m->finish_timestamp);
2347 dual_timestamp_serialize(f, "security-start-timestamp", &m->security_start_timestamp);
2348 dual_timestamp_serialize(f, "security-finish-timestamp", &m->security_finish_timestamp);
2349 dual_timestamp_serialize(f, "generators-start-timestamp", &m->generators_start_timestamp);
2350 dual_timestamp_serialize(f, "generators-finish-timestamp", &m->generators_finish_timestamp);
2351 dual_timestamp_serialize(f, "units-load-start-timestamp", &m->units_load_start_timestamp);
2352 dual_timestamp_serialize(f, "units-load-finish-timestamp", &m->units_load_finish_timestamp);
2353 }
2354
2355 if (!switching_root) {
2356 STRV_FOREACH(e, m->environment) {
2357 _cleanup_free_ char *ce;
2358
2359 ce = cescape(*e);
2360 if (!ce)
2361 return -ENOMEM;
2362
2363 fprintf(f, "env=%s\n", *e);
2364 }
2365 }
2366
2367 if (m->notify_fd >= 0) {
2368 int copy;
2369
2370 copy = fdset_put_dup(fds, m->notify_fd);
2371 if (copy < 0)
2372 return copy;
2373
2374 fprintf(f, "notify-fd=%i\n", copy);
2375 fprintf(f, "notify-socket=%s\n", m->notify_socket);
2376 }
2377
2378 if (m->cgroups_agent_fd >= 0) {
2379 int copy;
2380
2381 copy = fdset_put_dup(fds, m->cgroups_agent_fd);
2382 if (copy < 0)
2383 return copy;
2384
2385 fprintf(f, "cgroups-agent-fd=%i\n", copy);
2386 }
2387
2388 if (m->kdbus_fd >= 0) {
2389 int copy;
2390
2391 copy = fdset_put_dup(fds, m->kdbus_fd);
2392 if (copy < 0)
2393 return copy;
2394
2395 fprintf(f, "kdbus-fd=%i\n", copy);
2396 }
2397
2398 bus_track_serialize(m->subscribed, f);
2399
2400 fputc('\n', f);
2401
2402 HASHMAP_FOREACH_KEY(u, t, m->units, i) {
2403 if (u->id != t)
2404 continue;
2405
2406 /* Start marker */
2407 fputs(u->id, f);
2408 fputc('\n', f);
2409
2410 r = unit_serialize(u, f, fds, !switching_root);
2411 if (r < 0) {
2412 m->n_reloading--;
2413 return r;
2414 }
2415 }
2416
2417 assert(m->n_reloading > 0);
2418 m->n_reloading--;
2419
2420 if (ferror(f))
2421 return -EIO;
2422
2423 r = bus_fdset_add_all(m, fds);
2424 if (r < 0)
2425 return r;
2426
2427 return 0;
2428 }
2429
2430 int manager_deserialize(Manager *m, FILE *f, FDSet *fds) {
2431 int r = 0;
2432
2433 assert(m);
2434 assert(f);
2435
2436 log_debug("Deserializing state...");
2437
2438 m->n_reloading++;
2439
2440 for (;;) {
2441 char line[LINE_MAX], *l;
2442
2443 if (!fgets(line, sizeof(line), f)) {
2444 if (feof(f))
2445 r = 0;
2446 else
2447 r = -errno;
2448
2449 goto finish;
2450 }
2451
2452 char_array_0(line);
2453 l = strstrip(line);
2454
2455 if (l[0] == 0)
2456 break;
2457
2458 if (startswith(l, "current-job-id=")) {
2459 uint32_t id;
2460
2461 if (safe_atou32(l+15, &id) < 0)
2462 log_debug("Failed to parse current job id value %s", l+15);
2463 else
2464 m->current_job_id = MAX(m->current_job_id, id);
2465
2466 } else if (startswith(l, "n-installed-jobs=")) {
2467 uint32_t n;
2468
2469 if (safe_atou32(l+17, &n) < 0)
2470 log_debug("Failed to parse installed jobs counter %s", l+17);
2471 else
2472 m->n_installed_jobs += n;
2473
2474 } else if (startswith(l, "n-failed-jobs=")) {
2475 uint32_t n;
2476
2477 if (safe_atou32(l+14, &n) < 0)
2478 log_debug("Failed to parse failed jobs counter %s", l+14);
2479 else
2480 m->n_failed_jobs += n;
2481
2482 } else if (startswith(l, "taint-usr=")) {
2483 int b;
2484
2485 b = parse_boolean(l+10);
2486 if (b < 0)
2487 log_debug("Failed to parse taint /usr flag %s", l+10);
2488 else
2489 m->taint_usr = m->taint_usr || b;
2490
2491 } else if (startswith(l, "firmware-timestamp="))
2492 dual_timestamp_deserialize(l+19, &m->firmware_timestamp);
2493 else if (startswith(l, "loader-timestamp="))
2494 dual_timestamp_deserialize(l+17, &m->loader_timestamp);
2495 else if (startswith(l, "kernel-timestamp="))
2496 dual_timestamp_deserialize(l+17, &m->kernel_timestamp);
2497 else if (startswith(l, "initrd-timestamp="))
2498 dual_timestamp_deserialize(l+17, &m->initrd_timestamp);
2499 else if (startswith(l, "userspace-timestamp="))
2500 dual_timestamp_deserialize(l+20, &m->userspace_timestamp);
2501 else if (startswith(l, "finish-timestamp="))
2502 dual_timestamp_deserialize(l+17, &m->finish_timestamp);
2503 else if (startswith(l, "security-start-timestamp="))
2504 dual_timestamp_deserialize(l+25, &m->security_start_timestamp);
2505 else if (startswith(l, "security-finish-timestamp="))
2506 dual_timestamp_deserialize(l+26, &m->security_finish_timestamp);
2507 else if (startswith(l, "generators-start-timestamp="))
2508 dual_timestamp_deserialize(l+27, &m->generators_start_timestamp);
2509 else if (startswith(l, "generators-finish-timestamp="))
2510 dual_timestamp_deserialize(l+28, &m->generators_finish_timestamp);
2511 else if (startswith(l, "units-load-start-timestamp="))
2512 dual_timestamp_deserialize(l+27, &m->units_load_start_timestamp);
2513 else if (startswith(l, "units-load-finish-timestamp="))
2514 dual_timestamp_deserialize(l+28, &m->units_load_finish_timestamp);
2515 else if (startswith(l, "env=")) {
2516 _cleanup_free_ char *uce = NULL;
2517 char **e;
2518
2519 r = cunescape(l + 4, UNESCAPE_RELAX, &uce);
2520 if (r < 0)
2521 goto finish;
2522
2523 e = strv_env_set(m->environment, uce);
2524 if (!e) {
2525 r = -ENOMEM;
2526 goto finish;
2527 }
2528
2529 strv_free(m->environment);
2530 m->environment = e;
2531
2532 } else if (startswith(l, "notify-fd=")) {
2533 int fd;
2534
2535 if (safe_atoi(l + 10, &fd) < 0 || fd < 0 || !fdset_contains(fds, fd))
2536 log_debug("Failed to parse notify fd: %s", l + 10);
2537 else {
2538 m->notify_event_source = sd_event_source_unref(m->notify_event_source);
2539 safe_close(m->notify_fd);
2540 m->notify_fd = fdset_remove(fds, fd);
2541 }
2542
2543 } else if (startswith(l, "notify-socket=")) {
2544 char *n;
2545
2546 n = strdup(l+14);
2547 if (!n) {
2548 r = -ENOMEM;
2549 goto finish;
2550 }
2551
2552 free(m->notify_socket);
2553 m->notify_socket = n;
2554
2555 } else if (startswith(l, "cgroups-agent-fd=")) {
2556 int fd;
2557
2558 if (safe_atoi(l + 17, &fd) < 0 || fd < 0 || !fdset_contains(fds, fd))
2559 log_debug("Failed to parse cgroups agent fd: %s", l + 10);
2560 else {
2561 m->cgroups_agent_event_source = sd_event_source_unref(m->cgroups_agent_event_source);
2562 safe_close(m->cgroups_agent_fd);
2563 m->cgroups_agent_fd = fdset_remove(fds, fd);
2564 }
2565
2566 } else if (startswith(l, "kdbus-fd=")) {
2567 int fd;
2568
2569 if (safe_atoi(l + 9, &fd) < 0 || fd < 0 || !fdset_contains(fds, fd))
2570 log_debug("Failed to parse kdbus fd: %s", l + 9);
2571 else {
2572 safe_close(m->kdbus_fd);
2573 m->kdbus_fd = fdset_remove(fds, fd);
2574 }
2575
2576 } else {
2577 int k;
2578
2579 k = bus_track_deserialize_item(&m->deserialized_subscribed, l);
2580 if (k < 0)
2581 log_debug_errno(k, "Failed to deserialize bus tracker object: %m");
2582 else if (k == 0)
2583 log_debug("Unknown serialization item '%s'", l);
2584 }
2585 }
2586
2587 for (;;) {
2588 Unit *u;
2589 char name[UNIT_NAME_MAX+2];
2590
2591 /* Start marker */
2592 if (!fgets(name, sizeof(name), f)) {
2593 if (feof(f))
2594 r = 0;
2595 else
2596 r = -errno;
2597
2598 goto finish;
2599 }
2600
2601 char_array_0(name);
2602
2603 r = manager_load_unit(m, strstrip(name), NULL, NULL, &u);
2604 if (r < 0)
2605 goto finish;
2606
2607 r = unit_deserialize(u, f, fds);
2608 if (r < 0)
2609 goto finish;
2610 }
2611
2612 finish:
2613 if (ferror(f))
2614 r = -EIO;
2615
2616 assert(m->n_reloading > 0);
2617 m->n_reloading--;
2618
2619 return r;
2620 }
2621
2622 int manager_reload(Manager *m) {
2623 int r, q;
2624 _cleanup_fclose_ FILE *f = NULL;
2625 _cleanup_fdset_free_ FDSet *fds = NULL;
2626
2627 assert(m);
2628
2629 r = manager_open_serialization(m, &f);
2630 if (r < 0)
2631 return r;
2632
2633 m->n_reloading++;
2634 bus_manager_send_reloading(m, true);
2635
2636 fds = fdset_new();
2637 if (!fds) {
2638 m->n_reloading--;
2639 return -ENOMEM;
2640 }
2641
2642 r = manager_serialize(m, f, fds, false);
2643 if (r < 0) {
2644 m->n_reloading--;
2645 return r;
2646 }
2647
2648 if (fseeko(f, 0, SEEK_SET) < 0) {
2649 m->n_reloading--;
2650 return -errno;
2651 }
2652
2653 /* From here on there is no way back. */
2654 manager_clear_jobs_and_units(m);
2655 lookup_paths_flush_generator(&m->lookup_paths);
2656 lookup_paths_free(&m->lookup_paths);
2657
2658 q = lookup_paths_init(&m->lookup_paths, m->unit_file_scope, 0, NULL);
2659 if (q < 0 && r >= 0)
2660 r = q;
2661
2662 /* Find new unit paths */
2663 q = manager_run_generators(m);
2664 if (q < 0 && r >= 0)
2665 r = q;
2666
2667 lookup_paths_reduce(&m->lookup_paths);
2668 manager_build_unit_path_cache(m);
2669
2670 /* First, enumerate what we can from all config files */
2671 manager_enumerate(m);
2672
2673 /* Second, deserialize our stored data */
2674 q = manager_deserialize(m, f, fds);
2675 if (q < 0 && r >= 0)
2676 r = q;
2677
2678 fclose(f);
2679 f = NULL;
2680
2681 /* Re-register notify_fd as event source */
2682 q = manager_setup_notify(m);
2683 if (q < 0 && r >= 0)
2684 r = q;
2685
2686 q = manager_setup_cgroups_agent(m);
2687 if (q < 0 && r >= 0)
2688 r = q;
2689
2690 /* Third, fire things up! */
2691 manager_coldplug(m);
2692
2693 /* Sync current state of bus names with our set of listening units */
2694 if (m->api_bus)
2695 manager_sync_bus_names(m, m->api_bus);
2696
2697 assert(m->n_reloading > 0);
2698 m->n_reloading--;
2699
2700 m->send_reloading_done = true;
2701
2702 return r;
2703 }
2704
2705 void manager_reset_failed(Manager *m) {
2706 Unit *u;
2707 Iterator i;
2708
2709 assert(m);
2710
2711 HASHMAP_FOREACH(u, m->units, i)
2712 unit_reset_failed(u);
2713 }
2714
2715 bool manager_unit_inactive_or_pending(Manager *m, const char *name) {
2716 Unit *u;
2717
2718 assert(m);
2719 assert(name);
2720
2721 /* Returns true if the unit is inactive or going down */
2722 u = manager_get_unit(m, name);
2723 if (!u)
2724 return true;
2725
2726 return unit_inactive_or_pending(u);
2727 }
2728
2729 static void manager_notify_finished(Manager *m) {
2730 char userspace[FORMAT_TIMESPAN_MAX], initrd[FORMAT_TIMESPAN_MAX], kernel[FORMAT_TIMESPAN_MAX], sum[FORMAT_TIMESPAN_MAX];
2731 usec_t firmware_usec, loader_usec, kernel_usec, initrd_usec, userspace_usec, total_usec;
2732
2733 if (m->test_run)
2734 return;
2735
2736 if (MANAGER_IS_SYSTEM(m) && detect_container() <= 0) {
2737
2738 /* Note that m->kernel_usec.monotonic is always at 0,
2739 * and m->firmware_usec.monotonic and
2740 * m->loader_usec.monotonic should be considered
2741 * negative values. */
2742
2743 firmware_usec = m->firmware_timestamp.monotonic - m->loader_timestamp.monotonic;
2744 loader_usec = m->loader_timestamp.monotonic - m->kernel_timestamp.monotonic;
2745 userspace_usec = m->finish_timestamp.monotonic - m->userspace_timestamp.monotonic;
2746 total_usec = m->firmware_timestamp.monotonic + m->finish_timestamp.monotonic;
2747
2748 if (dual_timestamp_is_set(&m->initrd_timestamp)) {
2749
2750 kernel_usec = m->initrd_timestamp.monotonic - m->kernel_timestamp.monotonic;
2751 initrd_usec = m->userspace_timestamp.monotonic - m->initrd_timestamp.monotonic;
2752
2753 log_struct(LOG_INFO,
2754 LOG_MESSAGE_ID(SD_MESSAGE_STARTUP_FINISHED),
2755 "KERNEL_USEC="USEC_FMT, kernel_usec,
2756 "INITRD_USEC="USEC_FMT, initrd_usec,
2757 "USERSPACE_USEC="USEC_FMT, userspace_usec,
2758 LOG_MESSAGE("Startup finished in %s (kernel) + %s (initrd) + %s (userspace) = %s.",
2759 format_timespan(kernel, sizeof(kernel), kernel_usec, USEC_PER_MSEC),
2760 format_timespan(initrd, sizeof(initrd), initrd_usec, USEC_PER_MSEC),
2761 format_timespan(userspace, sizeof(userspace), userspace_usec, USEC_PER_MSEC),
2762 format_timespan(sum, sizeof(sum), total_usec, USEC_PER_MSEC)),
2763 NULL);
2764 } else {
2765 kernel_usec = m->userspace_timestamp.monotonic - m->kernel_timestamp.monotonic;
2766 initrd_usec = 0;
2767
2768 log_struct(LOG_INFO,
2769 LOG_MESSAGE_ID(SD_MESSAGE_STARTUP_FINISHED),
2770 "KERNEL_USEC="USEC_FMT, kernel_usec,
2771 "USERSPACE_USEC="USEC_FMT, userspace_usec,
2772 LOG_MESSAGE("Startup finished in %s (kernel) + %s (userspace) = %s.",
2773 format_timespan(kernel, sizeof(kernel), kernel_usec, USEC_PER_MSEC),
2774 format_timespan(userspace, sizeof(userspace), userspace_usec, USEC_PER_MSEC),
2775 format_timespan(sum, sizeof(sum), total_usec, USEC_PER_MSEC)),
2776 NULL);
2777 }
2778 } else {
2779 firmware_usec = loader_usec = initrd_usec = kernel_usec = 0;
2780 total_usec = userspace_usec = m->finish_timestamp.monotonic - m->userspace_timestamp.monotonic;
2781
2782 log_struct(LOG_INFO,
2783 LOG_MESSAGE_ID(SD_MESSAGE_STARTUP_FINISHED),
2784 "USERSPACE_USEC="USEC_FMT, userspace_usec,
2785 LOG_MESSAGE("Startup finished in %s.",
2786 format_timespan(sum, sizeof(sum), total_usec, USEC_PER_MSEC)),
2787 NULL);
2788 }
2789
2790 bus_manager_send_finished(m, firmware_usec, loader_usec, kernel_usec, initrd_usec, userspace_usec, total_usec);
2791
2792 sd_notifyf(false,
2793 "READY=1\n"
2794 "STATUS=Startup finished in %s.",
2795 format_timespan(sum, sizeof(sum), total_usec, USEC_PER_MSEC));
2796 }
2797
2798 void manager_check_finished(Manager *m) {
2799 assert(m);
2800
2801 if (MANAGER_IS_RELOADING(m))
2802 return;
2803
2804 /* Verify that we are actually running currently. Initially
2805 * the exit code is set to invalid, and during operation it is
2806 * then set to MANAGER_OK */
2807 if (m->exit_code != MANAGER_OK)
2808 return;
2809
2810 if (hashmap_size(m->jobs) > 0) {
2811 if (m->jobs_in_progress_event_source)
2812 /* Ignore any failure, this is only for feedback */
2813 (void) sd_event_source_set_time(m->jobs_in_progress_event_source, now(CLOCK_MONOTONIC) + JOBS_IN_PROGRESS_WAIT_USEC);
2814
2815 return;
2816 }
2817
2818 manager_flip_auto_status(m, false);
2819
2820 /* Notify Type=idle units that we are done now */
2821 manager_close_idle_pipe(m);
2822
2823 /* Turn off confirm spawn now */
2824 m->confirm_spawn = false;
2825
2826 /* No need to update ask password status when we're going non-interactive */
2827 manager_close_ask_password(m);
2828
2829 /* This is no longer the first boot */
2830 manager_set_first_boot(m, false);
2831
2832 if (dual_timestamp_is_set(&m->finish_timestamp))
2833 return;
2834
2835 dual_timestamp_get(&m->finish_timestamp);
2836
2837 manager_notify_finished(m);
2838
2839 manager_invalidate_startup_units(m);
2840 }
2841
2842 static int manager_run_generators(Manager *m) {
2843 _cleanup_strv_free_ char **paths = NULL;
2844 const char *argv[5];
2845 char **path;
2846 int r;
2847
2848 assert(m);
2849
2850 if (m->test_run)
2851 return 0;
2852
2853 paths = generator_binary_paths(m->unit_file_scope);
2854 if (!paths)
2855 return log_oom();
2856
2857 /* Optimize by skipping the whole process by not creating output directories
2858 * if no generators are found. */
2859 STRV_FOREACH(path, paths) {
2860 if (access(*path, F_OK) >= 0)
2861 goto found;
2862 if (errno != ENOENT)
2863 log_warning_errno(errno, "Failed to open generator directory %s: %m", *path);
2864 }
2865
2866 return 0;
2867
2868 found:
2869 r = lookup_paths_mkdir_generator(&m->lookup_paths);
2870 if (r < 0)
2871 goto finish;
2872
2873 argv[0] = NULL; /* Leave this empty, execute_directory() will fill something in */
2874 argv[1] = m->lookup_paths.generator;
2875 argv[2] = m->lookup_paths.generator_early;
2876 argv[3] = m->lookup_paths.generator_late;
2877 argv[4] = NULL;
2878
2879 RUN_WITH_UMASK(0022)
2880 execute_directories((const char* const*) paths, DEFAULT_TIMEOUT_USEC, (char**) argv);
2881
2882 finish:
2883 lookup_paths_trim_generator(&m->lookup_paths);
2884 return r;
2885 }
2886
2887 int manager_environment_add(Manager *m, char **minus, char **plus) {
2888 char **a = NULL, **b = NULL, **l;
2889 assert(m);
2890
2891 l = m->environment;
2892
2893 if (!strv_isempty(minus)) {
2894 a = strv_env_delete(l, 1, minus);
2895 if (!a)
2896 return -ENOMEM;
2897
2898 l = a;
2899 }
2900
2901 if (!strv_isempty(plus)) {
2902 b = strv_env_merge(2, l, plus);
2903 if (!b) {
2904 strv_free(a);
2905 return -ENOMEM;
2906 }
2907
2908 l = b;
2909 }
2910
2911 if (m->environment != l)
2912 strv_free(m->environment);
2913 if (a != l)
2914 strv_free(a);
2915 if (b != l)
2916 strv_free(b);
2917
2918 m->environment = l;
2919 manager_clean_environment(m);
2920 strv_sort(m->environment);
2921
2922 return 0;
2923 }
2924
2925 int manager_set_default_rlimits(Manager *m, struct rlimit **default_rlimit) {
2926 int i;
2927
2928 assert(m);
2929
2930 for (i = 0; i < _RLIMIT_MAX; i++) {
2931 m->rlimit[i] = mfree(m->rlimit[i]);
2932
2933 if (!default_rlimit[i])
2934 continue;
2935
2936 m->rlimit[i] = newdup(struct rlimit, default_rlimit[i], 1);
2937 if (!m->rlimit[i])
2938 return -ENOMEM;
2939 }
2940
2941 return 0;
2942 }
2943
2944 void manager_recheck_journal(Manager *m) {
2945 Unit *u;
2946
2947 assert(m);
2948
2949 if (!MANAGER_IS_SYSTEM(m))
2950 return;
2951
2952 u = manager_get_unit(m, SPECIAL_JOURNALD_SOCKET);
2953 if (u && SOCKET(u)->state != SOCKET_RUNNING) {
2954 log_close_journal();
2955 return;
2956 }
2957
2958 u = manager_get_unit(m, SPECIAL_JOURNALD_SERVICE);
2959 if (u && SERVICE(u)->state != SERVICE_RUNNING) {
2960 log_close_journal();
2961 return;
2962 }
2963
2964 /* Hmm, OK, so the socket is fully up and the service is up
2965 * too, then let's make use of the thing. */
2966 log_open();
2967 }
2968
2969 void manager_set_show_status(Manager *m, ShowStatus mode) {
2970 assert(m);
2971 assert(IN_SET(mode, SHOW_STATUS_AUTO, SHOW_STATUS_NO, SHOW_STATUS_YES, SHOW_STATUS_TEMPORARY));
2972
2973 if (!MANAGER_IS_SYSTEM(m))
2974 return;
2975
2976 if (m->show_status != mode)
2977 log_debug("%s showing of status.",
2978 mode == SHOW_STATUS_NO ? "Disabling" : "Enabling");
2979 m->show_status = mode;
2980
2981 if (mode > 0)
2982 (void) touch("/run/systemd/show-status");
2983 else
2984 (void) unlink("/run/systemd/show-status");
2985 }
2986
2987 static bool manager_get_show_status(Manager *m, StatusType type) {
2988 assert(m);
2989
2990 if (!MANAGER_IS_SYSTEM(m))
2991 return false;
2992
2993 if (m->no_console_output)
2994 return false;
2995
2996 if (!IN_SET(manager_state(m), MANAGER_INITIALIZING, MANAGER_STARTING, MANAGER_STOPPING))
2997 return false;
2998
2999 /* If we cannot find out the status properly, just proceed. */
3000 if (type != STATUS_TYPE_EMERGENCY && manager_check_ask_password(m) > 0)
3001 return false;
3002
3003 if (m->show_status > 0)
3004 return true;
3005
3006 return false;
3007 }
3008
3009 void manager_set_first_boot(Manager *m, bool b) {
3010 assert(m);
3011
3012 if (!MANAGER_IS_SYSTEM(m))
3013 return;
3014
3015 if (m->first_boot != (int) b) {
3016 if (b)
3017 (void) touch("/run/systemd/first-boot");
3018 else
3019 (void) unlink("/run/systemd/first-boot");
3020 }
3021
3022 m->first_boot = b;
3023 }
3024
3025 void manager_status_printf(Manager *m, StatusType type, const char *status, const char *format, ...) {
3026 va_list ap;
3027
3028 /* If m is NULL, assume we're after shutdown and let the messages through. */
3029
3030 if (m && !manager_get_show_status(m, type))
3031 return;
3032
3033 /* XXX We should totally drop the check for ephemeral here
3034 * and thus effectively make 'Type=idle' pointless. */
3035 if (type == STATUS_TYPE_EPHEMERAL && m && m->n_on_console > 0)
3036 return;
3037
3038 va_start(ap, format);
3039 status_vprintf(status, true, type == STATUS_TYPE_EPHEMERAL, format, ap);
3040 va_end(ap);
3041 }
3042
3043 Set *manager_get_units_requiring_mounts_for(Manager *m, const char *path) {
3044 char p[strlen(path)+1];
3045
3046 assert(m);
3047 assert(path);
3048
3049 strcpy(p, path);
3050 path_kill_slashes(p);
3051
3052 return hashmap_get(m->units_requiring_mounts_for, streq(p, "/") ? "" : p);
3053 }
3054
3055 const char *manager_get_runtime_prefix(Manager *m) {
3056 assert(m);
3057
3058 return MANAGER_IS_SYSTEM(m) ?
3059 "/run" :
3060 getenv("XDG_RUNTIME_DIR");
3061 }
3062
3063 int manager_update_failed_units(Manager *m, Unit *u, bool failed) {
3064 unsigned size;
3065 int r;
3066
3067 assert(m);
3068 assert(u->manager == m);
3069
3070 size = set_size(m->failed_units);
3071
3072 if (failed) {
3073 r = set_ensure_allocated(&m->failed_units, NULL);
3074 if (r < 0)
3075 return log_oom();
3076
3077 if (set_put(m->failed_units, u) < 0)
3078 return log_oom();
3079 } else
3080 (void) set_remove(m->failed_units, u);
3081
3082 if (set_size(m->failed_units) != size)
3083 bus_manager_send_change_signal(m);
3084
3085 return 0;
3086 }
3087
3088 ManagerState manager_state(Manager *m) {
3089 Unit *u;
3090
3091 assert(m);
3092
3093 /* Did we ever finish booting? If not then we are still starting up */
3094 if (!dual_timestamp_is_set(&m->finish_timestamp)) {
3095
3096 u = manager_get_unit(m, SPECIAL_BASIC_TARGET);
3097 if (!u || !UNIT_IS_ACTIVE_OR_RELOADING(unit_active_state(u)))
3098 return MANAGER_INITIALIZING;
3099
3100 return MANAGER_STARTING;
3101 }
3102
3103 /* Is the special shutdown target queued? If so, we are in shutdown state */
3104 u = manager_get_unit(m, SPECIAL_SHUTDOWN_TARGET);
3105 if (u && u->job && IN_SET(u->job->type, JOB_START, JOB_RESTART, JOB_RELOAD_OR_START))
3106 return MANAGER_STOPPING;
3107
3108 /* Are the rescue or emergency targets active or queued? If so we are in maintenance state */
3109 u = manager_get_unit(m, SPECIAL_RESCUE_TARGET);
3110 if (u && (UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(u)) ||
3111 (u->job && IN_SET(u->job->type, JOB_START, JOB_RESTART, JOB_RELOAD_OR_START))))
3112 return MANAGER_MAINTENANCE;
3113
3114 u = manager_get_unit(m, SPECIAL_EMERGENCY_TARGET);
3115 if (u && (UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(u)) ||
3116 (u->job && IN_SET(u->job->type, JOB_START, JOB_RESTART, JOB_RELOAD_OR_START))))
3117 return MANAGER_MAINTENANCE;
3118
3119 /* Are there any failed units? If so, we are in degraded mode */
3120 if (set_size(m->failed_units) > 0)
3121 return MANAGER_DEGRADED;
3122
3123 return MANAGER_RUNNING;
3124 }
3125
3126 static const char *const manager_state_table[_MANAGER_STATE_MAX] = {
3127 [MANAGER_INITIALIZING] = "initializing",
3128 [MANAGER_STARTING] = "starting",
3129 [MANAGER_RUNNING] = "running",
3130 [MANAGER_DEGRADED] = "degraded",
3131 [MANAGER_MAINTENANCE] = "maintenance",
3132 [MANAGER_STOPPING] = "stopping",
3133 };
3134
3135 DEFINE_STRING_TABLE_LOOKUP(manager_state, ManagerState);
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