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Commit | Line | Data |
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f13467ec | 1 | /* SPDX-License-Identifier: GPL-2.0-or-later */ |
7fafc032 | 2 | /* |
810adae9 LP |
3 | * Copyright © 2004 Chris Friesen <chris_friesen@sympatico.ca> |
4 | * Copyright © 2009 Canonical Ltd. | |
5 | * Copyright © 2009 Scott James Remnant <scott@netsplit.com> | |
7fafc032 KS |
6 | */ |
7 | ||
7fafc032 | 8 | #include <errno.h> |
618234a5 LP |
9 | #include <fcntl.h> |
10 | #include <getopt.h> | |
618234a5 LP |
11 | #include <stdbool.h> |
12 | #include <stddef.h> | |
7fafc032 KS |
13 | #include <stdio.h> |
14 | #include <stdlib.h> | |
618234a5 | 15 | #include <sys/epoll.h> |
3ebdb81e | 16 | #include <sys/file.h> |
618234a5 LP |
17 | #include <sys/inotify.h> |
18 | #include <sys/ioctl.h> | |
19 | #include <sys/mount.h> | |
1e03b754 | 20 | #include <sys/prctl.h> |
1e03b754 | 21 | #include <sys/signalfd.h> |
dc117daa | 22 | #include <sys/stat.h> |
618234a5 LP |
23 | #include <sys/time.h> |
24 | #include <sys/wait.h> | |
25 | #include <unistd.h> | |
7fafc032 | 26 | |
392ef7a2 | 27 | #include "sd-daemon.h" |
693d371d | 28 | #include "sd-event.h" |
8314de1d | 29 | |
b5efdb8a | 30 | #include "alloc-util.h" |
a1f4fd38 | 31 | #include "cgroup-setup.h" |
194bbe33 | 32 | #include "cgroup-util.h" |
618234a5 | 33 | #include "cpu-set-util.h" |
5ba2dc25 | 34 | #include "dev-setup.h" |
7f2e3a14 | 35 | #include "device-monitor-private.h" |
abde5ea8 | 36 | #include "device-private.h" |
70068602 | 37 | #include "device-util.h" |
6467bda5 | 38 | #include "errno-list.h" |
6d63048a | 39 | #include "event-util.h" |
3ffd4af2 | 40 | #include "fd-util.h" |
a5c32cff | 41 | #include "fileio.h" |
f97b34a6 | 42 | #include "format-util.h" |
f4f15635 | 43 | #include "fs-util.h" |
a505965d | 44 | #include "hashmap.h" |
9e5fd717 | 45 | #include "inotify-util.h" |
c004493c | 46 | #include "io-util.h" |
eefc66aa | 47 | #include "limits-util.h" |
40a57716 | 48 | #include "list.h" |
0c5a109a | 49 | #include "main-func.h" |
5ea78a39 | 50 | #include "mkdir.h" |
618234a5 | 51 | #include "netlink-util.h" |
6bedfcbb | 52 | #include "parse-util.h" |
a1f4fd38 | 53 | #include "path-util.h" |
294bf0c3 | 54 | #include "pretty-print.h" |
4e731273 | 55 | #include "proc-cmdline.h" |
618234a5 LP |
56 | #include "process-util.h" |
57 | #include "selinux-util.h" | |
58 | #include "signal-util.h" | |
8f328d36 | 59 | #include "socket-util.h" |
07630cea | 60 | #include "string-util.h" |
49fe5c09 | 61 | #include "strv.h" |
5ea78a39 | 62 | #include "strxcpyx.h" |
46f0fbd8 | 63 | #include "syslog-util.h" |
63e2d171 | 64 | #include "udevd.h" |
07a26e42 | 65 | #include "udev-builtin.h" |
7d68eb1b | 66 | #include "udev-ctrl.h" |
25de7aa7 | 67 | #include "udev-event.h" |
618234a5 | 68 | #include "udev-util.h" |
70068602 | 69 | #include "udev-watch.h" |
ee104e11 | 70 | #include "user-util.h" |
47350c5f | 71 | #include "version.h" |
7fafc032 | 72 | |
88bd5a32 | 73 | #define WORKER_NUM_MAX 2048U |
5d354e52 YW |
74 | #define EVENT_RETRY_INTERVAL_USEC (200 * USEC_PER_MSEC) |
75 | #define EVENT_RETRY_TIMEOUT_USEC (3 * USEC_PER_MINUTE) | |
88bd5a32 | 76 | |
bba7a484 TG |
77 | static bool arg_debug = false; |
78 | static int arg_daemonize = false; | |
c4d44cba | 79 | static ResolveNameTiming arg_resolve_name_timing = RESOLVE_NAME_EARLY; |
216e8bbe | 80 | static unsigned arg_children_max = 0; |
6b92f429 | 81 | static usec_t arg_exec_delay_usec = 0; |
bba7a484 | 82 | static usec_t arg_event_timeout_usec = 180 * USEC_PER_SEC; |
e2099267 | 83 | static int arg_timeout_signal = SIGKILL; |
95ac5230 | 84 | static bool arg_blockdev_read_only = false; |
c0c6806b | 85 | |
d9239923 YW |
86 | typedef struct Event Event; |
87 | typedef struct Worker Worker; | |
88 | ||
c0c6806b | 89 | typedef struct Manager { |
693d371d | 90 | sd_event *event; |
c0c6806b | 91 | Hashmap *workers; |
d9239923 | 92 | LIST_HEAD(Event, events); |
a1f4fd38 | 93 | char *cgroup; |
cb49a4f2 | 94 | pid_t pid; /* the process that originally allocated the manager object */ |
1a0bd015 | 95 | int log_level; |
c0c6806b | 96 | |
9a07157d | 97 | UdevRules *rules; |
9b5150b6 | 98 | Hashmap *properties; |
c0c6806b | 99 | |
0bed242c YW |
100 | sd_netlink *rtnl; |
101 | ||
7f2e3a14 | 102 | sd_device_monitor *monitor; |
e0d61dac | 103 | UdevCtrl *ctrl; |
e237d8cb TG |
104 | int worker_watch[2]; |
105 | ||
df7ee959 YW |
106 | /* used by udev-watch */ |
107 | int inotify_fd; | |
693d371d | 108 | sd_event_source *inotify_event; |
df7ee959 | 109 | |
eca195ec | 110 | sd_event_source *kill_workers_event; |
693d371d | 111 | |
7c4c7e89 TG |
112 | usec_t last_usec; |
113 | ||
481f24d1 YW |
114 | bool stop_exec_queue; |
115 | bool exit; | |
c0c6806b | 116 | } Manager; |
1e03b754 | 117 | |
d9239923 | 118 | typedef enum EventState { |
912541b0 KS |
119 | EVENT_UNDEF, |
120 | EVENT_QUEUED, | |
121 | EVENT_RUNNING, | |
d9239923 | 122 | } EventState; |
1e03b754 | 123 | |
d9239923 | 124 | typedef struct Event { |
cb49a4f2 | 125 | Manager *manager; |
d9239923 YW |
126 | Worker *worker; |
127 | EventState state; | |
eb546b35 YW |
128 | |
129 | sd_device *dev; | |
eb546b35 | 130 | |
0c3d8182 | 131 | sd_device_action_t action; |
eb546b35 | 132 | uint64_t seqnum; |
a1fa99d8 | 133 | uint64_t blocker_seqnum; |
5d354e52 YW |
134 | usec_t retry_again_next_usec; |
135 | usec_t retry_again_timeout_usec; | |
d8f462b4 YW |
136 | |
137 | sd_event_source *timeout_warning_event; | |
138 | sd_event_source *timeout_event; | |
eb546b35 | 139 | |
d9239923 YW |
140 | LIST_FIELDS(Event, event); |
141 | } Event; | |
1e03b754 | 142 | |
d9239923 | 143 | typedef enum WorkerState { |
912541b0 KS |
144 | WORKER_UNDEF, |
145 | WORKER_RUNNING, | |
146 | WORKER_IDLE, | |
147 | WORKER_KILLED, | |
f257a8fc | 148 | WORKER_KILLING, |
d9239923 | 149 | } WorkerState; |
1e03b754 | 150 | |
d9239923 | 151 | typedef struct Worker { |
c0c6806b | 152 | Manager *manager; |
912541b0 | 153 | pid_t pid; |
7f2e3a14 | 154 | sd_device_monitor *monitor; |
d9239923 YW |
155 | WorkerState state; |
156 | Event *event; | |
157 | } Worker; | |
1e03b754 KS |
158 | |
159 | /* passed from worker to main process */ | |
5d354e52 | 160 | typedef enum EventResult { |
6467bda5 YW |
161 | EVENT_RESULT_NERRNO_MIN = -ERRNO_MAX, |
162 | EVENT_RESULT_NERRNO_MAX = -1, | |
163 | EVENT_RESULT_EXIT_STATUS_BASE = 0, | |
164 | EVENT_RESULT_EXIT_STATUS_MAX = 255, | |
165 | EVENT_RESULT_TRY_AGAIN = 256, /* when the block device is locked by another process. */ | |
166 | EVENT_RESULT_SIGNAL_BASE = 257, | |
167 | EVENT_RESULT_SIGNAL_MAX = EVENT_RESULT_SIGNAL_BASE + _NSIG, | |
5d354e52 | 168 | _EVENT_RESULT_MAX, |
6467bda5 | 169 | _EVENT_RESULT_INVALID = -EINVAL, |
5d354e52 | 170 | } EventResult; |
1e03b754 | 171 | |
5393c528 | 172 | static Event *event_free(Event *event) { |
c6aa11f2 | 173 | if (!event) |
5393c528 | 174 | return NULL; |
ba47b71c | 175 | |
40a57716 | 176 | assert(event->manager); |
c6aa11f2 | 177 | |
40a57716 | 178 | LIST_REMOVE(event, event->manager->events, event); |
eb546b35 | 179 | sd_device_unref(event->dev); |
c6aa11f2 | 180 | |
72151060 YW |
181 | /* Do not use sd_event_source_disable_unref() here, as this is called by both workers and the |
182 | * main process. */ | |
183 | sd_event_source_unref(event->timeout_warning_event); | |
184 | sd_event_source_unref(event->timeout_event); | |
693d371d | 185 | |
c6aa11f2 TG |
186 | if (event->worker) |
187 | event->worker->event = NULL; | |
188 | ||
5393c528 | 189 | return mfree(event); |
aa8734ff | 190 | } |
7a770250 | 191 | |
419ec631 | 192 | static void event_queue_cleanup(Manager *manager, EventState match_state) { |
80a226b2 | 193 | LIST_FOREACH(event, event, manager->events) { |
419ec631 YW |
194 | if (match_state != EVENT_UNDEF && match_state != event->state) |
195 | continue; | |
196 | ||
197 | event_free(event); | |
198 | } | |
199 | } | |
200 | ||
d9239923 | 201 | static Worker *worker_free(Worker *worker) { |
c6aa11f2 | 202 | if (!worker) |
75db809a | 203 | return NULL; |
bc113de9 | 204 | |
c0c6806b TG |
205 | assert(worker->manager); |
206 | ||
4a0b58c4 | 207 | hashmap_remove(worker->manager->workers, PID_TO_PTR(worker->pid)); |
7f2e3a14 | 208 | sd_device_monitor_unref(worker->monitor); |
c6aa11f2 TG |
209 | event_free(worker->event); |
210 | ||
75db809a | 211 | return mfree(worker); |
ff2c503d KS |
212 | } |
213 | ||
d9239923 YW |
214 | DEFINE_TRIVIAL_CLEANUP_FUNC(Worker*, worker_free); |
215 | DEFINE_PRIVATE_HASH_OPS_WITH_VALUE_DESTRUCTOR(worker_hash_op, void, trivial_hash_func, trivial_compare_func, Worker, worker_free); | |
fc465079 | 216 | |
419ec631 YW |
217 | static void manager_clear_for_worker(Manager *manager) { |
218 | assert(manager); | |
219 | ||
f777e745 YW |
220 | /* Do not use sd_event_source_disable_unref() here, as this is called by both workers and the |
221 | * main process. */ | |
222 | manager->inotify_event = sd_event_source_unref(manager->inotify_event); | |
223 | manager->kill_workers_event = sd_event_source_unref(manager->kill_workers_event); | |
419ec631 YW |
224 | |
225 | manager->event = sd_event_unref(manager->event); | |
226 | ||
227 | manager->workers = hashmap_free(manager->workers); | |
228 | event_queue_cleanup(manager, EVENT_UNDEF); | |
229 | ||
230 | manager->monitor = sd_device_monitor_unref(manager->monitor); | |
231 | manager->ctrl = udev_ctrl_unref(manager->ctrl); | |
232 | ||
233 | manager->worker_watch[READ_END] = safe_close(manager->worker_watch[READ_END]); | |
234 | } | |
235 | ||
236 | static Manager* manager_free(Manager *manager) { | |
237 | if (!manager) | |
238 | return NULL; | |
239 | ||
240 | udev_builtin_exit(); | |
241 | ||
419ec631 YW |
242 | manager_clear_for_worker(manager); |
243 | ||
244 | sd_netlink_unref(manager->rtnl); | |
245 | ||
246 | hashmap_free_free_free(manager->properties); | |
247 | udev_rules_free(manager->rules); | |
248 | ||
249 | safe_close(manager->inotify_fd); | |
250 | safe_close_pair(manager->worker_watch); | |
251 | ||
a1f4fd38 | 252 | free(manager->cgroup); |
419ec631 YW |
253 | return mfree(manager); |
254 | } | |
255 | ||
256 | DEFINE_TRIVIAL_CLEANUP_FUNC(Manager*, manager_free); | |
257 | ||
d9239923 YW |
258 | static int worker_new(Worker **ret, Manager *manager, sd_device_monitor *worker_monitor, pid_t pid) { |
259 | _cleanup_(worker_freep) Worker *worker = NULL; | |
a505965d | 260 | int r; |
3a19b32a TG |
261 | |
262 | assert(ret); | |
c0c6806b | 263 | assert(manager); |
3a19b32a TG |
264 | assert(worker_monitor); |
265 | assert(pid > 1); | |
266 | ||
d4053464 YW |
267 | /* close monitor, but keep address around */ |
268 | device_monitor_disconnect(worker_monitor); | |
269 | ||
d9239923 | 270 | worker = new(Worker, 1); |
3a19b32a TG |
271 | if (!worker) |
272 | return -ENOMEM; | |
273 | ||
d9239923 | 274 | *worker = (Worker) { |
d4053464 YW |
275 | .manager = manager, |
276 | .monitor = sd_device_monitor_ref(worker_monitor), | |
277 | .pid = pid, | |
278 | }; | |
a505965d | 279 | |
92a74c47 | 280 | r = hashmap_ensure_put(&manager->workers, &worker_hash_op, PID_TO_PTR(pid), worker); |
a505965d TG |
281 | if (r < 0) |
282 | return r; | |
283 | ||
ae2a15bc | 284 | *ret = TAKE_PTR(worker); |
3a19b32a TG |
285 | |
286 | return 0; | |
287 | } | |
288 | ||
419ec631 YW |
289 | static void manager_kill_workers(Manager *manager, bool force) { |
290 | Worker *worker; | |
4fa4d885 | 291 | |
419ec631 | 292 | assert(manager); |
4fa4d885 | 293 | |
419ec631 YW |
294 | HASHMAP_FOREACH(worker, manager->workers) { |
295 | if (worker->state == WORKER_KILLED) | |
296 | continue; | |
4fa4d885 | 297 | |
419ec631 YW |
298 | if (worker->state == WORKER_RUNNING && !force) { |
299 | worker->state = WORKER_KILLING; | |
300 | continue; | |
301 | } | |
4fa4d885 | 302 | |
419ec631 YW |
303 | worker->state = WORKER_KILLED; |
304 | (void) kill(worker->pid, SIGTERM); | |
305 | } | |
4fa4d885 TG |
306 | } |
307 | ||
419ec631 YW |
308 | static void manager_exit(Manager *manager) { |
309 | assert(manager); | |
693d371d | 310 | |
419ec631 | 311 | manager->exit = true; |
693d371d | 312 | |
419ec631 YW |
313 | sd_notify(false, |
314 | "STOPPING=1\n" | |
315 | "STATUS=Starting shutdown..."); | |
39c19cf1 | 316 | |
419ec631 YW |
317 | /* close sources of new events and discard buffered events */ |
318 | manager->ctrl = udev_ctrl_unref(manager->ctrl); | |
0bed242c | 319 | |
9612da36 | 320 | manager->inotify_event = sd_event_source_disable_unref(manager->inotify_event); |
419ec631 | 321 | manager->inotify_fd = safe_close(manager->inotify_fd); |
0bed242c | 322 | |
7f2e3a14 | 323 | manager->monitor = sd_device_monitor_unref(manager->monitor); |
0bed242c | 324 | |
419ec631 YW |
325 | /* discard queued events and kill workers */ |
326 | event_queue_cleanup(manager, EVENT_QUEUED); | |
327 | manager_kill_workers(manager, true); | |
0bed242c YW |
328 | } |
329 | ||
4bf4f50f ZJS |
330 | static void notify_ready(void) { |
331 | int r; | |
332 | ||
333 | r = sd_notifyf(false, | |
334 | "READY=1\n" | |
335 | "STATUS=Processing with %u children at max", arg_children_max); | |
336 | if (r < 0) | |
337 | log_warning_errno(r, "Failed to send readiness notification, ignoring: %m"); | |
338 | } | |
339 | ||
419ec631 YW |
340 | /* reload requested, HUP signal received, rules changed, builtin changed */ |
341 | static void manager_reload(Manager *manager) { | |
419ec631 | 342 | assert(manager); |
b2d21d93 | 343 | |
419ec631 YW |
344 | sd_notify(false, |
345 | "RELOADING=1\n" | |
346 | "STATUS=Flushing configuration..."); | |
76e62a4d | 347 | |
419ec631 YW |
348 | manager_kill_workers(manager, false); |
349 | manager->rules = udev_rules_free(manager->rules); | |
350 | udev_builtin_exit(); | |
693d371d | 351 | |
4bf4f50f | 352 | notify_ready(); |
419ec631 | 353 | } |
e237d8cb | 354 | |
419ec631 YW |
355 | static int on_kill_workers_event(sd_event_source *s, uint64_t usec, void *userdata) { |
356 | Manager *manager = userdata; | |
e237d8cb | 357 | |
419ec631 | 358 | assert(manager); |
e237d8cb | 359 | |
419ec631 YW |
360 | log_debug("Cleanup idle workers"); |
361 | manager_kill_workers(manager, false); | |
e237d8cb | 362 | |
419ec631 YW |
363 | return 1; |
364 | } | |
e237d8cb | 365 | |
6467bda5 | 366 | static void device_broadcast(sd_device_monitor *monitor, sd_device *dev, int result) { |
c17ab900 YW |
367 | int r; |
368 | ||
369 | assert(dev); | |
370 | ||
371 | /* On exit, manager->monitor is already NULL. */ | |
372 | if (!monitor) | |
373 | return; | |
374 | ||
6467bda5 YW |
375 | if (result != 0) { |
376 | (void) device_add_property(dev, "UDEV_WORKER_FAILED", "1"); | |
377 | ||
378 | switch (result) { | |
fb544617 YW |
379 | case EVENT_RESULT_NERRNO_MIN ... EVENT_RESULT_NERRNO_MAX: { |
380 | const char *str; | |
381 | ||
6467bda5 | 382 | (void) device_add_propertyf(dev, "UDEV_WORKER_ERRNO", "%i", -result); |
6467bda5 | 383 | |
fb544617 YW |
384 | str = errno_to_name(result); |
385 | if (str) | |
386 | (void) device_add_property(dev, "UDEV_WORKER_ERRNO_NAME", str); | |
387 | break; | |
388 | } | |
6467bda5 YW |
389 | case EVENT_RESULT_EXIT_STATUS_BASE ... EVENT_RESULT_EXIT_STATUS_MAX: |
390 | (void) device_add_propertyf(dev, "UDEV_WORKER_EXIT_STATUS", "%i", result - EVENT_RESULT_EXIT_STATUS_BASE); | |
391 | break; | |
392 | ||
393 | case EVENT_RESULT_TRY_AGAIN: | |
394 | assert_not_reached(); | |
395 | break; | |
396 | ||
fb544617 YW |
397 | case EVENT_RESULT_SIGNAL_BASE ... EVENT_RESULT_SIGNAL_MAX: { |
398 | const char *str; | |
399 | ||
6467bda5 | 400 | (void) device_add_propertyf(dev, "UDEV_WORKER_SIGNAL", "%i", result - EVENT_RESULT_SIGNAL_BASE); |
6467bda5 | 401 | |
fb544617 YW |
402 | str = signal_to_string(result - EVENT_RESULT_SIGNAL_BASE); |
403 | if (str) | |
404 | (void) device_add_property(dev, "UDEV_WORKER_SIGNAL_NAME", str); | |
405 | break; | |
406 | } | |
6467bda5 YW |
407 | default: |
408 | log_device_warning(dev, "Unknown event result \"%i\", ignoring.", result); | |
409 | } | |
410 | } | |
411 | ||
c17ab900 YW |
412 | r = device_monitor_send_device(monitor, NULL, dev); |
413 | if (r < 0) | |
414 | log_device_warning_errno(dev, r, | |
415 | "Failed to broadcast event to libudev listeners, ignoring: %m"); | |
416 | } | |
417 | ||
6467bda5 | 418 | static int worker_send_result(Manager *manager, int result) { |
5d354e52 YW |
419 | assert(manager); |
420 | assert(manager->worker_watch[WRITE_END] >= 0); | |
9a73bd7c | 421 | |
5d354e52 | 422 | return loop_write(manager->worker_watch[WRITE_END], &result, sizeof(result), false); |
9a73bd7c TG |
423 | } |
424 | ||
78e278ad | 425 | static int device_get_whole_disk(sd_device *dev, sd_device **ret_device, const char **ret_devname) { |
b97897e3 YW |
426 | const char *val; |
427 | int r; | |
fee854ee | 428 | |
0bed242c | 429 | assert(dev); |
a1130022 LP |
430 | |
431 | if (device_for_action(dev, SD_DEVICE_REMOVE)) | |
7b7959fb | 432 | goto irrelevant; |
0bed242c | 433 | |
b97897e3 YW |
434 | r = sd_device_get_subsystem(dev, &val); |
435 | if (r < 0) | |
436 | return log_device_debug_errno(dev, r, "Failed to get subsystem: %m"); | |
437 | ||
438 | if (!streq(val, "block")) | |
7b7959fb | 439 | goto irrelevant; |
fee854ee | 440 | |
b97897e3 YW |
441 | r = sd_device_get_sysname(dev, &val); |
442 | if (r < 0) | |
443 | return log_device_debug_errno(dev, r, "Failed to get sysname: %m"); | |
444 | ||
a9e83209 YW |
445 | /* Exclude the following devices: |
446 | * For "dm-", see the comment added by e918a1b5a94f270186dca59156354acd2a596494. | |
447 | * For "md", see the commit message of 2e5b17d01347d3c3118be2b8ad63d20415dbb1f0, | |
448 | * but not sure the assumption is still valid even when partitions are created on the md | |
449 | * devices, surprisingly which seems to be possible, see PR #22973. | |
450 | * For "drbd", see the commit message of fee854ee8ccde0cd28e0f925dea18cce35f3993d. */ | |
49fe5c09 | 451 | if (STARTSWITH_SET(val, "dm-", "md", "drbd")) |
7b7959fb | 452 | goto irrelevant; |
0bed242c | 453 | |
b97897e3 YW |
454 | r = sd_device_get_devtype(dev, &val); |
455 | if (r < 0 && r != -ENOENT) | |
456 | return log_device_debug_errno(dev, r, "Failed to get devtype: %m"); | |
457 | if (r >= 0 && streq(val, "partition")) { | |
458 | r = sd_device_get_parent(dev, &dev); | |
20ba5a3f YW |
459 | if (r == -ENOENT) /* The device may be already removed. */ |
460 | goto irrelevant; | |
b97897e3 YW |
461 | if (r < 0) |
462 | return log_device_debug_errno(dev, r, "Failed to get parent device: %m"); | |
463 | } | |
0bed242c | 464 | |
b97897e3 YW |
465 | r = sd_device_get_devname(dev, &val); |
466 | if (r == -ENOENT) | |
7b7959fb | 467 | goto irrelevant; |
b97897e3 YW |
468 | if (r < 0) |
469 | return log_device_debug_errno(dev, r, "Failed to get devname: %m"); | |
0bed242c | 470 | |
78e278ad YW |
471 | if (ret_device) |
472 | *ret_device = dev; | |
473 | if (ret_devname) | |
474 | *ret_devname = val; | |
7b7959fb YW |
475 | return 1; |
476 | ||
477 | irrelevant: | |
78e278ad YW |
478 | if (ret_device) |
479 | *ret_device = NULL; | |
480 | if (ret_devname) | |
481 | *ret_devname = NULL; | |
7b7959fb YW |
482 | return 0; |
483 | } | |
484 | ||
03a24ce7 | 485 | static int worker_lock_whole_disk(sd_device *dev, int *ret_fd) { |
7b7959fb | 486 | _cleanup_close_ int fd = -1; |
78e278ad | 487 | sd_device *dev_whole_disk; |
7b7959fb YW |
488 | const char *val; |
489 | int r; | |
490 | ||
491 | assert(dev); | |
492 | assert(ret_fd); | |
493 | ||
494 | /* Take a shared lock on the device node; this establishes a concept of device "ownership" to | |
495 | * serialize device access. External processes holding an exclusive lock will cause udev to skip the | |
496 | * event handling; in the case udev acquired the lock, the external process can block until udev has | |
497 | * finished its event handling. */ | |
498 | ||
78e278ad | 499 | r = device_get_whole_disk(dev, &dev_whole_disk, &val); |
7b7959fb YW |
500 | if (r < 0) |
501 | return r; | |
502 | if (r == 0) | |
503 | goto nolock; | |
504 | ||
78e278ad | 505 | fd = sd_device_open(dev_whole_disk, O_RDONLY|O_CLOEXEC|O_NONBLOCK); |
b97897e3 | 506 | if (fd < 0) { |
78e278ad | 507 | bool ignore = ERRNO_IS_DEVICE_ABSENT(fd); |
ef400c38 | 508 | |
78e278ad | 509 | log_device_debug_errno(dev, fd, "Failed to open '%s'%s: %m", val, ignore ? ", ignoring" : ""); |
7b7959fb | 510 | if (!ignore) |
78e278ad | 511 | return fd; |
7b7959fb YW |
512 | |
513 | goto nolock; | |
b97897e3 | 514 | } |
0bed242c YW |
515 | |
516 | if (flock(fd, LOCK_SH|LOCK_NB) < 0) | |
b97897e3 | 517 | return log_device_debug_errno(dev, errno, "Failed to flock(%s): %m", val); |
0bed242c YW |
518 | |
519 | *ret_fd = TAKE_FD(fd); | |
520 | return 1; | |
7b7959fb YW |
521 | |
522 | nolock: | |
523 | *ret_fd = -1; | |
524 | return 0; | |
fee854ee RK |
525 | } |
526 | ||
95ac5230 LP |
527 | static int worker_mark_block_device_read_only(sd_device *dev) { |
528 | _cleanup_close_ int fd = -1; | |
529 | const char *val; | |
530 | int state = 1, r; | |
531 | ||
532 | assert(dev); | |
533 | ||
534 | if (!arg_blockdev_read_only) | |
535 | return 0; | |
536 | ||
537 | /* Do this only once, when the block device is new. If the device is later retriggered let's not | |
538 | * toggle the bit again, so that people can boot up with full read-only mode and then unset the bit | |
539 | * for specific devices only. */ | |
a1130022 | 540 | if (!device_for_action(dev, SD_DEVICE_ADD)) |
95ac5230 LP |
541 | return 0; |
542 | ||
543 | r = sd_device_get_subsystem(dev, &val); | |
544 | if (r < 0) | |
545 | return log_device_debug_errno(dev, r, "Failed to get subsystem: %m"); | |
546 | ||
547 | if (!streq(val, "block")) | |
548 | return 0; | |
549 | ||
550 | r = sd_device_get_sysname(dev, &val); | |
551 | if (r < 0) | |
552 | return log_device_debug_errno(dev, r, "Failed to get sysname: %m"); | |
553 | ||
554 | /* Exclude synthetic devices for now, this is supposed to be a safety feature to avoid modification | |
555 | * of physical devices, and what sits on top of those doesn't really matter if we don't allow the | |
cb713f16 | 556 | * underlying block devices to receive changes. */ |
95ac5230 LP |
557 | if (STARTSWITH_SET(val, "dm-", "md", "drbd", "loop", "nbd", "zram")) |
558 | return 0; | |
559 | ||
78e278ad | 560 | fd = sd_device_open(dev, O_RDONLY|O_CLOEXEC|O_NONBLOCK); |
95ac5230 | 561 | if (fd < 0) |
78e278ad | 562 | return log_device_debug_errno(dev, fd, "Failed to open '%s', ignoring: %m", val); |
95ac5230 LP |
563 | |
564 | if (ioctl(fd, BLKROSET, &state) < 0) | |
565 | return log_device_warning_errno(dev, errno, "Failed to mark block device '%s' read-only: %m", val); | |
566 | ||
567 | log_device_info(dev, "Successfully marked block device '%s' read-only.", val); | |
568 | return 0; | |
569 | } | |
570 | ||
abde5ea8 | 571 | static int worker_process_device(Manager *manager, sd_device *dev) { |
2e088715 | 572 | _cleanup_(udev_event_freep) UdevEvent *udev_event = NULL; |
0bed242c YW |
573 | _cleanup_close_ int fd_lock = -1; |
574 | int r; | |
912541b0 | 575 | |
0bed242c YW |
576 | assert(manager); |
577 | assert(dev); | |
578 | ||
b2d9e58f | 579 | log_device_uevent(dev, "Processing device"); |
abde5ea8 | 580 | |
1a0bd015 | 581 | udev_event = udev_event_new(dev, arg_exec_delay_usec, manager->rtnl, manager->log_level); |
0bed242c YW |
582 | if (!udev_event) |
583 | return -ENOMEM; | |
584 | ||
5d354e52 YW |
585 | /* If this is a block device and the device is locked currently via the BSD advisory locks, |
586 | * someone else is using it exclusively. We don't run our udev rules now to not interfere. | |
587 | * Instead of processing the event, we requeue the event and will try again after a delay. | |
588 | * | |
589 | * The user-facing side of this: https://systemd.io/BLOCK_DEVICE_LOCKING */ | |
03a24ce7 | 590 | r = worker_lock_whole_disk(dev, &fd_lock); |
6467bda5 YW |
591 | if (r == -EAGAIN) |
592 | return EVENT_RESULT_TRY_AGAIN; | |
b6aab8ef | 593 | if (r < 0) |
0bed242c | 594 | return r; |
912541b0 | 595 | |
95ac5230 LP |
596 | (void) worker_mark_block_device_read_only(dev); |
597 | ||
0bed242c | 598 | /* apply rules, create node, symlinks */ |
df7ee959 YW |
599 | r = udev_event_execute_rules( |
600 | udev_event, | |
601 | manager->inotify_fd, | |
602 | arg_event_timeout_usec, | |
603 | arg_timeout_signal, | |
604 | manager->properties, | |
605 | manager->rules); | |
99058cd6 YW |
606 | if (r < 0) |
607 | return r; | |
608 | ||
e2099267 | 609 | udev_event_execute_run(udev_event, arg_event_timeout_usec, arg_timeout_signal); |
2dd9f98d | 610 | |
0bed242c YW |
611 | if (!manager->rtnl) |
612 | /* in case rtnl was initialized */ | |
613 | manager->rtnl = sd_netlink_ref(udev_event->rtnl); | |
912541b0 | 614 | |
0d77bc4a YW |
615 | r = udev_event_process_inotify_watch(udev_event, manager->inotify_fd); |
616 | if (r < 0) | |
617 | return r; | |
912541b0 | 618 | |
b2d9e58f | 619 | log_device_uevent(dev, "Device processed"); |
0bed242c YW |
620 | return 0; |
621 | } | |
912541b0 | 622 | |
e2130348 YW |
623 | static int worker_device_monitor_handler(sd_device_monitor *monitor, sd_device *dev, void *userdata) { |
624 | Manager *manager = userdata; | |
625 | int r; | |
626 | ||
627 | assert(dev); | |
628 | assert(manager); | |
629 | ||
630 | r = worker_process_device(manager, dev); | |
6467bda5 | 631 | if (r == EVENT_RESULT_TRY_AGAIN) |
5d354e52 | 632 | /* if we couldn't acquire the flock(), then requeue the event */ |
6467bda5 YW |
633 | log_device_debug(dev, "Block device is currently locked, requeueing the event."); |
634 | else { | |
635 | if (r < 0) | |
636 | log_device_warning_errno(dev, r, "Failed to process device, ignoring: %m"); | |
e2130348 | 637 | |
5abee64e | 638 | /* send processed event back to libudev listeners */ |
6467bda5 YW |
639 | device_broadcast(monitor, dev, r); |
640 | } | |
e2130348 YW |
641 | |
642 | /* send udevd the result of the event execution */ | |
6467bda5 | 643 | r = worker_send_result(manager, r); |
e2130348 YW |
644 | if (r < 0) |
645 | log_device_warning_errno(dev, r, "Failed to send signal to main daemon, ignoring: %m"); | |
646 | ||
1a0bd015 | 647 | /* Reset the log level, as it might be changed by "OPTIONS=log_level=". */ |
3cc6b14a | 648 | log_set_max_level(manager->log_level); |
1a0bd015 | 649 | |
e2130348 YW |
650 | return 1; |
651 | } | |
652 | ||
7f2e3a14 YW |
653 | static int worker_main(Manager *_manager, sd_device_monitor *monitor, sd_device *first_device) { |
654 | _cleanup_(sd_device_unrefp) sd_device *dev = first_device; | |
0bed242c | 655 | _cleanup_(manager_freep) Manager *manager = _manager; |
44dcf454 | 656 | int r; |
145dae7e | 657 | |
0bed242c YW |
658 | assert(manager); |
659 | assert(monitor); | |
660 | assert(dev); | |
912541b0 | 661 | |
44ee03d1 | 662 | assert_se(unsetenv("NOTIFY_SOCKET") == 0); |
3b64e4d4 | 663 | |
e2130348 YW |
664 | assert_se(sigprocmask_many(SIG_BLOCK, NULL, SIGTERM, -1) >= 0); |
665 | ||
666 | /* Reset OOM score, we only protect the main daemon. */ | |
667 | r = set_oom_score_adjust(0); | |
668 | if (r < 0) | |
669 | log_debug_errno(r, "Failed to reset OOM score, ignoring: %m"); | |
912541b0 | 670 | |
7802194a | 671 | /* Clear unnecessary data in Manager object. */ |
e2130348 | 672 | manager_clear_for_worker(manager); |
3ebdb81e | 673 | |
e2130348 YW |
674 | r = sd_event_new(&manager->event); |
675 | if (r < 0) | |
676 | return log_error_errno(r, "Failed to allocate event loop: %m"); | |
912541b0 | 677 | |
e2130348 YW |
678 | r = sd_event_add_signal(manager->event, NULL, SIGTERM, NULL, NULL); |
679 | if (r < 0) | |
680 | return log_error_errno(r, "Failed to set SIGTERM event: %m"); | |
4c83d994 | 681 | |
e2130348 YW |
682 | r = sd_device_monitor_attach_event(monitor, manager->event); |
683 | if (r < 0) | |
684 | return log_error_errno(r, "Failed to attach event loop to device monitor: %m"); | |
912541b0 | 685 | |
e2130348 | 686 | r = sd_device_monitor_start(monitor, worker_device_monitor_handler, manager); |
0bed242c | 687 | if (r < 0) |
e2130348 | 688 | return log_error_errno(r, "Failed to start device monitor: %m"); |
912541b0 | 689 | |
e2130348 | 690 | (void) sd_event_source_set_description(sd_device_monitor_get_event_source(monitor), "worker-device-monitor"); |
b66f29a1 | 691 | |
e2130348 YW |
692 | /* Process first device */ |
693 | (void) worker_device_monitor_handler(monitor, dev, manager); | |
912541b0 | 694 | |
e2130348 YW |
695 | r = sd_event_loop(manager->event); |
696 | if (r < 0) | |
697 | return log_error_errno(r, "Event loop failed: %m"); | |
698 | ||
44dcf454 | 699 | return 0; |
0bed242c YW |
700 | } |
701 | ||
419ec631 YW |
702 | static int on_event_timeout(sd_event_source *s, uint64_t usec, void *userdata) { |
703 | Event *event = userdata; | |
704 | ||
705 | assert(event); | |
706 | assert(event->worker); | |
707 | ||
708 | kill_and_sigcont(event->worker->pid, arg_timeout_signal); | |
709 | event->worker->state = WORKER_KILLED; | |
710 | ||
711 | log_device_error(event->dev, "Worker ["PID_FMT"] processing SEQNUM=%"PRIu64" killed", event->worker->pid, event->seqnum); | |
712 | ||
713 | return 1; | |
714 | } | |
715 | ||
716 | static int on_event_timeout_warning(sd_event_source *s, uint64_t usec, void *userdata) { | |
717 | Event *event = userdata; | |
718 | ||
719 | assert(event); | |
720 | assert(event->worker); | |
721 | ||
722 | log_device_warning(event->dev, "Worker ["PID_FMT"] processing SEQNUM=%"PRIu64" is taking a long time", event->worker->pid, event->seqnum); | |
723 | ||
724 | return 1; | |
725 | } | |
726 | ||
727 | static void worker_attach_event(Worker *worker, Event *event) { | |
728 | sd_event *e; | |
729 | ||
730 | assert(worker); | |
731 | assert(worker->manager); | |
732 | assert(event); | |
733 | assert(!event->worker); | |
734 | assert(!worker->event); | |
735 | ||
736 | worker->state = WORKER_RUNNING; | |
737 | worker->event = event; | |
738 | event->state = EVENT_RUNNING; | |
739 | event->worker = worker; | |
740 | ||
741 | e = worker->manager->event; | |
742 | ||
743 | (void) sd_event_add_time_relative(e, &event->timeout_warning_event, CLOCK_MONOTONIC, | |
744 | udev_warn_timeout(arg_event_timeout_usec), USEC_PER_SEC, | |
745 | on_event_timeout_warning, event); | |
746 | ||
747 | (void) sd_event_add_time_relative(e, &event->timeout_event, CLOCK_MONOTONIC, | |
748 | arg_event_timeout_usec, USEC_PER_SEC, | |
749 | on_event_timeout, event); | |
750 | } | |
751 | ||
d9239923 | 752 | static int worker_spawn(Manager *manager, Event *event) { |
7f2e3a14 | 753 | _cleanup_(sd_device_monitor_unrefp) sd_device_monitor *worker_monitor = NULL; |
d9239923 | 754 | Worker *worker; |
0bed242c | 755 | pid_t pid; |
7443654e | 756 | int r; |
0bed242c YW |
757 | |
758 | /* listen for new events */ | |
7f2e3a14 YW |
759 | r = device_monitor_new_full(&worker_monitor, MONITOR_GROUP_NONE, -1); |
760 | if (r < 0) | |
761 | return r; | |
7443654e | 762 | |
0bed242c | 763 | /* allow the main daemon netlink address to send devices to the worker */ |
7f2e3a14 YW |
764 | r = device_monitor_allow_unicast_sender(worker_monitor, manager->monitor); |
765 | if (r < 0) | |
766 | return log_error_errno(r, "Worker: Failed to set unicast sender: %m"); | |
767 | ||
768 | r = device_monitor_enable_receiving(worker_monitor); | |
0bed242c | 769 | if (r < 0) |
7f2e3a14 | 770 | return log_error_errno(r, "Worker: Failed to enable receiving of device: %m"); |
0bed242c | 771 | |
ff86c92e | 772 | r = safe_fork(NULL, FORK_DEATHSIG, &pid); |
7443654e YW |
773 | if (r < 0) { |
774 | event->state = EVENT_QUEUED; | |
775 | return log_error_errno(r, "Failed to fork() worker: %m"); | |
776 | } | |
777 | if (r == 0) { | |
b428efa5 MS |
778 | DEVICE_TRACE_POINT(worker_spawned, event->dev, getpid()); |
779 | ||
7443654e | 780 | /* Worker process */ |
eb546b35 | 781 | r = worker_main(manager, worker_monitor, sd_device_ref(event->dev)); |
baa30fbc | 782 | log_close(); |
8b46c3fc | 783 | _exit(r < 0 ? EXIT_FAILURE : EXIT_SUCCESS); |
912541b0 | 784 | } |
e03c7cc2 | 785 | |
7443654e YW |
786 | r = worker_new(&worker, manager, worker_monitor, pid); |
787 | if (r < 0) | |
788 | return log_error_errno(r, "Failed to create worker object: %m"); | |
e03c7cc2 | 789 | |
7443654e | 790 | worker_attach_event(worker, event); |
39c19cf1 | 791 | |
eb546b35 | 792 | log_device_debug(event->dev, "Worker ["PID_FMT"] is forked for processing SEQNUM=%"PRIu64".", pid, event->seqnum); |
7443654e | 793 | return 0; |
7fafc032 KS |
794 | } |
795 | ||
f2a5412b | 796 | static int event_run(Event *event) { |
5406c368 | 797 | static bool log_children_max_reached = true; |
f2a5412b | 798 | Manager *manager; |
d9239923 | 799 | Worker *worker; |
7f2e3a14 | 800 | int r; |
912541b0 | 801 | |
c0c6806b | 802 | assert(event); |
f2a5412b | 803 | assert(event->manager); |
c0c6806b | 804 | |
b2d9e58f | 805 | log_device_uevent(event->dev, "Device ready for processing"); |
7600dbb8 | 806 | |
f2a5412b | 807 | manager = event->manager; |
90e74a66 | 808 | HASHMAP_FOREACH(worker, manager->workers) { |
912541b0 KS |
809 | if (worker->state != WORKER_IDLE) |
810 | continue; | |
811 | ||
eb546b35 | 812 | r = device_monitor_send_device(manager->monitor, worker->monitor, event->dev); |
7f2e3a14 | 813 | if (r < 0) { |
eb546b35 | 814 | log_device_error_errno(event->dev, r, "Worker ["PID_FMT"] did not accept message, killing the worker: %m", |
7f2e3a14 | 815 | worker->pid); |
cb542e84 | 816 | (void) kill(worker->pid, SIGKILL); |
912541b0 KS |
817 | worker->state = WORKER_KILLED; |
818 | continue; | |
819 | } | |
39c19cf1 | 820 | worker_attach_event(worker, event); |
f2a5412b | 821 | return 1; /* event is now processing. */ |
912541b0 KS |
822 | } |
823 | ||
c0c6806b | 824 | if (hashmap_size(manager->workers) >= arg_children_max) { |
5406c368 FB |
825 | /* Avoid spamming the debug logs if the limit is already reached and |
826 | * many events still need to be processed */ | |
827 | if (log_children_max_reached && arg_children_max > 1) { | |
044497e2 | 828 | log_debug("Maximum number (%u) of children reached.", hashmap_size(manager->workers)); |
5406c368 FB |
829 | log_children_max_reached = false; |
830 | } | |
f2a5412b | 831 | return 0; /* no free worker */ |
912541b0 KS |
832 | } |
833 | ||
5406c368 FB |
834 | /* Re-enable the debug message for the next batch of events */ |
835 | log_children_max_reached = true; | |
836 | ||
912541b0 | 837 | /* start new worker and pass initial device */ |
f2a5412b YW |
838 | r = worker_spawn(manager, event); |
839 | if (r < 0) | |
840 | return r; | |
841 | ||
842 | return 1; /* event is now processing. */ | |
1e03b754 KS |
843 | } |
844 | ||
a1fa99d8 | 845 | static int event_is_blocked(Event *event) { |
eb546b35 YW |
846 | const char *subsystem, *devpath, *devpath_old = NULL; |
847 | dev_t devnum = makedev(0, 0); | |
03677889 | 848 | Event *loop_event = NULL; |
eb546b35 YW |
849 | size_t devpath_len; |
850 | int r, ifindex = 0; | |
851 | bool is_block; | |
852 | ||
a1fa99d8 YW |
853 | /* lookup event for identical, parent, child device */ |
854 | ||
044ac33c YW |
855 | assert(event); |
856 | assert(event->manager); | |
857 | assert(event->blocker_seqnum <= event->seqnum); | |
858 | ||
5d354e52 YW |
859 | if (event->retry_again_next_usec > 0) { |
860 | usec_t now_usec; | |
861 | ||
ba4e0427 | 862 | r = sd_event_now(event->manager->event, CLOCK_BOOTTIME, &now_usec); |
5d354e52 YW |
863 | if (r < 0) |
864 | return r; | |
865 | ||
866 | if (event->retry_again_next_usec <= now_usec) | |
867 | return true; | |
868 | } | |
869 | ||
044ac33c YW |
870 | if (event->blocker_seqnum == event->seqnum) |
871 | /* we have checked previously and no blocker found */ | |
872 | return false; | |
873 | ||
03677889 YW |
874 | LIST_FOREACH(event, e, event->manager->events) { |
875 | loop_event = e; | |
876 | ||
044ac33c YW |
877 | /* we already found a later event, earlier cannot block us, no need to check again */ |
878 | if (loop_event->seqnum < event->blocker_seqnum) | |
879 | continue; | |
880 | ||
881 | /* event we checked earlier still exists, no need to check again */ | |
882 | if (loop_event->seqnum == event->blocker_seqnum) | |
883 | return true; | |
884 | ||
885 | /* found ourself, no later event can block us */ | |
886 | if (loop_event->seqnum >= event->seqnum) | |
887 | goto no_blocker; | |
888 | ||
889 | /* found event we have not checked */ | |
890 | break; | |
891 | } | |
892 | ||
893 | assert(loop_event); | |
894 | assert(loop_event->seqnum > event->blocker_seqnum && | |
895 | loop_event->seqnum < event->seqnum); | |
896 | ||
eb546b35 YW |
897 | r = sd_device_get_subsystem(event->dev, &subsystem); |
898 | if (r < 0) | |
899 | return r; | |
900 | ||
901 | is_block = streq(subsystem, "block"); | |
902 | ||
903 | r = sd_device_get_devpath(event->dev, &devpath); | |
904 | if (r < 0) | |
905 | return r; | |
906 | ||
907 | devpath_len = strlen(devpath); | |
908 | ||
909 | r = sd_device_get_property_value(event->dev, "DEVPATH_OLD", &devpath_old); | |
910 | if (r < 0 && r != -ENOENT) | |
911 | return r; | |
912 | ||
913 | r = sd_device_get_devnum(event->dev, &devnum); | |
914 | if (r < 0 && r != -ENOENT) | |
915 | return r; | |
916 | ||
917 | r = sd_device_get_ifindex(event->dev, &ifindex); | |
918 | if (r < 0 && r != -ENOENT) | |
919 | return r; | |
912541b0 KS |
920 | |
921 | /* check if queue contains events we depend on */ | |
03677889 | 922 | LIST_FOREACH(event, e, loop_event) { |
eb546b35 YW |
923 | size_t loop_devpath_len, common; |
924 | const char *loop_devpath; | |
925 | ||
03677889 YW |
926 | loop_event = e; |
927 | ||
912541b0 KS |
928 | /* found ourself, no later event can block us */ |
929 | if (loop_event->seqnum >= event->seqnum) | |
044ac33c | 930 | goto no_blocker; |
912541b0 KS |
931 | |
932 | /* check major/minor */ | |
eb546b35 YW |
933 | if (major(devnum) != 0) { |
934 | const char *s; | |
935 | dev_t d; | |
936 | ||
937 | if (sd_device_get_subsystem(loop_event->dev, &s) < 0) | |
938 | continue; | |
939 | ||
940 | if (sd_device_get_devnum(loop_event->dev, &d) >= 0 && | |
941 | devnum == d && is_block == streq(s, "block")) | |
a1fa99d8 | 942 | break; |
eb546b35 | 943 | } |
912541b0 KS |
944 | |
945 | /* check network device ifindex */ | |
eb546b35 YW |
946 | if (ifindex > 0) { |
947 | int i; | |
948 | ||
949 | if (sd_device_get_ifindex(loop_event->dev, &i) >= 0 && | |
950 | ifindex == i) | |
a1fa99d8 | 951 | break; |
eb546b35 YW |
952 | } |
953 | ||
954 | if (sd_device_get_devpath(loop_event->dev, &loop_devpath) < 0) | |
955 | continue; | |
912541b0 KS |
956 | |
957 | /* check our old name */ | |
0bd0407e | 958 | if (devpath_old && streq(devpath_old, loop_devpath)) |
a1fa99d8 | 959 | break; |
912541b0 | 960 | |
eb546b35 YW |
961 | loop_devpath_len = strlen(loop_devpath); |
962 | ||
912541b0 | 963 | /* compare devpath */ |
eb546b35 | 964 | common = MIN(devpath_len, loop_devpath_len); |
912541b0 KS |
965 | |
966 | /* one devpath is contained in the other? */ | |
eb546b35 | 967 | if (!strneq(devpath, loop_devpath, common)) |
912541b0 KS |
968 | continue; |
969 | ||
970 | /* identical device event found */ | |
baa461fc | 971 | if (devpath_len == loop_devpath_len) |
a1fa99d8 | 972 | break; |
912541b0 KS |
973 | |
974 | /* parent device event found */ | |
0bd0407e | 975 | if (devpath[common] == '/') |
a1fa99d8 | 976 | break; |
912541b0 KS |
977 | |
978 | /* child device event found */ | |
0bd0407e | 979 | if (loop_devpath[common] == '/') |
a1fa99d8 | 980 | break; |
912541b0 KS |
981 | } |
982 | ||
a1fa99d8 | 983 | assert(loop_event); |
0bd0407e | 984 | |
7600dbb8 UKK |
985 | log_device_debug(event->dev, "SEQNUM=%" PRIu64 " blocked by SEQNUM=%" PRIu64, |
986 | event->seqnum, loop_event->seqnum); | |
987 | ||
a1fa99d8 | 988 | event->blocker_seqnum = loop_event->seqnum; |
0bd0407e | 989 | return true; |
044ac33c YW |
990 | |
991 | no_blocker: | |
992 | event->blocker_seqnum = event->seqnum; | |
993 | return false; | |
7fafc032 KS |
994 | } |
995 | ||
0744e74c | 996 | static int event_queue_start(Manager *manager) { |
693d371d | 997 | usec_t usec; |
0725c4b9 | 998 | int r; |
8ab44e3f | 999 | |
c0c6806b TG |
1000 | assert(manager); |
1001 | ||
40a57716 | 1002 | if (LIST_IS_EMPTY(manager->events) || |
7c4c7e89 | 1003 | manager->exit || manager->stop_exec_queue) |
0744e74c | 1004 | return 0; |
7c4c7e89 | 1005 | |
3285baa8 | 1006 | assert_se(sd_event_now(manager->event, CLOCK_MONOTONIC, &usec) >= 0); |
38a03f06 LP |
1007 | /* check for changed config, every 3 seconds at most */ |
1008 | if (manager->last_usec == 0 || | |
92fd70ad | 1009 | usec > usec_add(manager->last_usec, 3 * USEC_PER_SEC)) { |
38a03f06 | 1010 | if (udev_rules_check_timestamp(manager->rules) || |
2024ed61 | 1011 | udev_builtin_validate()) |
38a03f06 | 1012 | manager_reload(manager); |
693d371d | 1013 | |
38a03f06 | 1014 | manager->last_usec = usec; |
7c4c7e89 TG |
1015 | } |
1016 | ||
0725c4b9 YW |
1017 | r = event_source_disable(manager->kill_workers_event); |
1018 | if (r < 0) | |
1019 | log_warning_errno(r, "Failed to disable event source for cleaning up idle workers, ignoring: %m"); | |
eca195ec | 1020 | |
2024ed61 | 1021 | udev_builtin_init(); |
7c4c7e89 TG |
1022 | |
1023 | if (!manager->rules) { | |
c238a1f5 | 1024 | r = udev_rules_load(&manager->rules, arg_resolve_name_timing); |
0744e74c YW |
1025 | if (r < 0) |
1026 | return log_warning_errno(r, "Failed to read udev rules: %m"); | |
7c4c7e89 TG |
1027 | } |
1028 | ||
c02fb804 YW |
1029 | /* fork with up-to-date SELinux label database, so the child inherits the up-to-date db |
1030 | * and, until the next SELinux policy changes, we safe further reloads in future children */ | |
1031 | mac_selinux_maybe_reload(); | |
1032 | ||
80a226b2 | 1033 | LIST_FOREACH(event, event, manager->events) { |
912541b0 KS |
1034 | if (event->state != EVENT_QUEUED) |
1035 | continue; | |
0bc74ea7 | 1036 | |
c6f78234 YW |
1037 | /* do not start event if parent or child event is still running or queued */ |
1038 | r = event_is_blocked(event); | |
2d40f02e YW |
1039 | if (r > 0) |
1040 | continue; | |
0c3d8182 | 1041 | if (r < 0) |
c6f78234 | 1042 | log_device_warning_errno(event->dev, r, |
2d40f02e YW |
1043 | "Failed to check dependencies for event (SEQNUM=%"PRIu64", ACTION=%s), " |
1044 | "assuming there is no blocking event, ignoring: %m", | |
c6f78234 | 1045 | event->seqnum, |
0c3d8182 | 1046 | strna(device_action_to_string(event->action))); |
fc465079 | 1047 | |
f2a5412b | 1048 | r = event_run(event); |
2d40f02e | 1049 | if (r <= 0) /* 0 means there are no idle workers. Let's escape from the loop. */ |
f2a5412b | 1050 | return r; |
912541b0 | 1051 | } |
0744e74c YW |
1052 | |
1053 | return 0; | |
1e03b754 KS |
1054 | } |
1055 | ||
5d354e52 YW |
1056 | static int event_requeue(Event *event) { |
1057 | usec_t now_usec; | |
1058 | int r; | |
1059 | ||
1060 | assert(event); | |
1061 | assert(event->manager); | |
1062 | assert(event->manager->event); | |
1063 | ||
1064 | event->timeout_warning_event = sd_event_source_disable_unref(event->timeout_warning_event); | |
1065 | event->timeout_event = sd_event_source_disable_unref(event->timeout_event); | |
1066 | ||
1067 | /* add a short delay to suppress busy loop */ | |
ba4e0427 | 1068 | r = sd_event_now(event->manager->event, CLOCK_BOOTTIME, &now_usec); |
5d354e52 YW |
1069 | if (r < 0) |
1070 | return log_device_warning_errno(event->dev, r, | |
1071 | "Failed to get current time, " | |
1072 | "skipping event (SEQNUM=%"PRIu64", ACTION=%s): %m", | |
1073 | event->seqnum, strna(device_action_to_string(event->action))); | |
1074 | ||
1075 | if (event->retry_again_timeout_usec > 0 && event->retry_again_timeout_usec <= now_usec) | |
1076 | return log_device_warning_errno(event->dev, SYNTHETIC_ERRNO(ETIMEDOUT), | |
1077 | "The underlying block device is locked by a process more than %s, " | |
1078 | "skipping event (SEQNUM=%"PRIu64", ACTION=%s).", | |
1079 | FORMAT_TIMESPAN(EVENT_RETRY_TIMEOUT_USEC, USEC_PER_MINUTE), | |
1080 | event->seqnum, strna(device_action_to_string(event->action))); | |
1081 | ||
1082 | event->retry_again_next_usec = usec_add(now_usec, EVENT_RETRY_INTERVAL_USEC); | |
1083 | if (event->retry_again_timeout_usec == 0) | |
1084 | event->retry_again_timeout_usec = usec_add(now_usec, EVENT_RETRY_TIMEOUT_USEC); | |
1085 | ||
1086 | if (event->worker && event->worker->event == event) | |
1087 | event->worker->event = NULL; | |
1088 | event->worker = NULL; | |
1089 | ||
1090 | event->state = EVENT_QUEUED; | |
1091 | return 0; | |
1092 | } | |
1093 | ||
82a5de9f YW |
1094 | static int event_queue_assume_block_device_unlocked(Manager *manager, sd_device *dev) { |
1095 | const char *devname; | |
1096 | int r; | |
1097 | ||
1098 | /* When a new event for a block device is queued or we get an inotify event, assume that the | |
1099 | * device is not locked anymore. The assumption may not be true, but that should not cause any | |
1100 | * issues, as in that case events will be requeued soon. */ | |
1101 | ||
78e278ad | 1102 | r = device_get_whole_disk(dev, NULL, &devname); |
82a5de9f YW |
1103 | if (r <= 0) |
1104 | return r; | |
1105 | ||
1106 | LIST_FOREACH(event, event, manager->events) { | |
1107 | const char *event_devname; | |
1108 | ||
1109 | if (event->state != EVENT_QUEUED) | |
1110 | continue; | |
1111 | ||
1112 | if (event->retry_again_next_usec == 0) | |
1113 | continue; | |
1114 | ||
78e278ad | 1115 | if (device_get_whole_disk(event->dev, NULL, &event_devname) <= 0) |
82a5de9f YW |
1116 | continue; |
1117 | ||
1118 | if (!streq(devname, event_devname)) | |
1119 | continue; | |
1120 | ||
1121 | event->retry_again_next_usec = 0; | |
1122 | } | |
1123 | ||
1124 | return 0; | |
1125 | } | |
1126 | ||
419ec631 | 1127 | static int event_queue_insert(Manager *manager, sd_device *dev) { |
0c3d8182 | 1128 | sd_device_action_t action; |
419ec631 | 1129 | uint64_t seqnum; |
c9473aaa | 1130 | Event *event; |
419ec631 | 1131 | int r; |
ff2c503d | 1132 | |
419ec631 YW |
1133 | assert(manager); |
1134 | assert(dev); | |
ff2c503d | 1135 | |
419ec631 YW |
1136 | /* only one process can add events to the queue */ |
1137 | assert(manager->pid == getpid_cached()); | |
1138 | ||
1139 | /* We only accepts devices received by device monitor. */ | |
1140 | r = sd_device_get_seqnum(dev, &seqnum); | |
1141 | if (r < 0) | |
1142 | return r; | |
1143 | ||
0c3d8182 YW |
1144 | r = sd_device_get_action(dev, &action); |
1145 | if (r < 0) | |
1146 | return r; | |
1147 | ||
419ec631 YW |
1148 | event = new(Event, 1); |
1149 | if (!event) | |
1150 | return -ENOMEM; | |
1151 | ||
1152 | *event = (Event) { | |
1153 | .manager = manager, | |
1154 | .dev = sd_device_ref(dev), | |
419ec631 | 1155 | .seqnum = seqnum, |
0c3d8182 | 1156 | .action = action, |
419ec631 YW |
1157 | .state = EVENT_QUEUED, |
1158 | }; | |
1159 | ||
1160 | if (LIST_IS_EMPTY(manager->events)) { | |
1161 | r = touch("/run/udev/queue"); | |
1162 | if (r < 0) | |
6be97d67 | 1163 | log_warning_errno(r, "Failed to touch /run/udev/queue, ignoring: %m"); |
912541b0 | 1164 | } |
419ec631 YW |
1165 | |
1166 | LIST_APPEND(event, manager->events, event); | |
1167 | ||
1168 | log_device_uevent(dev, "Device is queued"); | |
1169 | ||
1170 | return 0; | |
1171 | } | |
1172 | ||
1173 | static int on_uevent(sd_device_monitor *monitor, sd_device *dev, void *userdata) { | |
1174 | Manager *manager = userdata; | |
1175 | int r; | |
1176 | ||
1177 | assert(manager); | |
1178 | ||
1179 | DEVICE_TRACE_POINT(kernel_uevent_received, dev); | |
1180 | ||
1181 | device_ensure_usec_initialized(dev, NULL); | |
1182 | ||
1183 | r = event_queue_insert(manager, dev); | |
1184 | if (r < 0) { | |
1185 | log_device_error_errno(dev, r, "Failed to insert device into event queue: %m"); | |
1186 | return 1; | |
1187 | } | |
1188 | ||
82a5de9f YW |
1189 | (void) event_queue_assume_block_device_unlocked(manager, dev); |
1190 | ||
419ec631 YW |
1191 | /* we have fresh events, try to schedule them */ |
1192 | event_queue_start(manager); | |
1193 | ||
1194 | return 1; | |
ff2c503d KS |
1195 | } |
1196 | ||
e82e8fa5 | 1197 | static int on_worker(sd_event_source *s, int fd, uint32_t revents, void *userdata) { |
c0c6806b TG |
1198 | Manager *manager = userdata; |
1199 | ||
1200 | assert(manager); | |
1201 | ||
912541b0 | 1202 | for (;;) { |
6467bda5 | 1203 | int result; |
5d354e52 | 1204 | struct iovec iovec = IOVEC_MAKE(&result, sizeof(result)); |
fb29cdbe | 1205 | CMSG_BUFFER_TYPE(CMSG_SPACE(sizeof(struct ucred))) control; |
979558f3 TG |
1206 | struct msghdr msghdr = { |
1207 | .msg_iov = &iovec, | |
1208 | .msg_iovlen = 1, | |
1209 | .msg_control = &control, | |
1210 | .msg_controllen = sizeof(control), | |
1211 | }; | |
912541b0 | 1212 | ssize_t size; |
371d72e0 | 1213 | struct ucred *ucred; |
d9239923 | 1214 | Worker *worker; |
912541b0 | 1215 | |
3691bcf3 LP |
1216 | size = recvmsg_safe(fd, &msghdr, MSG_DONTWAIT); |
1217 | if (size == -EINTR) | |
1218 | continue; | |
1219 | if (size == -EAGAIN) | |
1220 | /* nothing more to read */ | |
1221 | break; | |
1222 | if (size < 0) | |
1223 | return log_error_errno(size, "Failed to receive message: %m"); | |
1224 | ||
1225 | cmsg_close_all(&msghdr); | |
979558f3 | 1226 | |
6467bda5 | 1227 | if (size != sizeof(result)) { |
d4e98880 | 1228 | log_warning("Ignoring worker message with invalid size %zi bytes", size); |
e82e8fa5 | 1229 | continue; |
979558f3 TG |
1230 | } |
1231 | ||
371d72e0 | 1232 | ucred = CMSG_FIND_DATA(&msghdr, SOL_SOCKET, SCM_CREDENTIALS, struct ucred); |
979558f3 | 1233 | if (!ucred || ucred->pid <= 0) { |
d4e98880 | 1234 | log_warning("Ignoring worker message without valid PID"); |
979558f3 TG |
1235 | continue; |
1236 | } | |
912541b0 KS |
1237 | |
1238 | /* lookup worker who sent the signal */ | |
4a0b58c4 | 1239 | worker = hashmap_get(manager->workers, PID_TO_PTR(ucred->pid)); |
a505965d | 1240 | if (!worker) { |
044497e2 | 1241 | log_debug("Worker ["PID_FMT"] returned, but is no longer tracked", ucred->pid); |
a505965d | 1242 | continue; |
912541b0 | 1243 | } |
c0bbfd72 | 1244 | |
f257a8fc YG |
1245 | if (worker->state == WORKER_KILLING) { |
1246 | worker->state = WORKER_KILLED; | |
1247 | (void) kill(worker->pid, SIGTERM); | |
1248 | } else if (worker->state != WORKER_KILLED) | |
a505965d TG |
1249 | worker->state = WORKER_IDLE; |
1250 | ||
1251 | /* worker returned */ | |
5d354e52 YW |
1252 | if (result == EVENT_RESULT_TRY_AGAIN && |
1253 | event_requeue(worker->event) < 0) | |
6467bda5 | 1254 | device_broadcast(manager->monitor, worker->event->dev, -ETIMEDOUT); |
5d354e52 YW |
1255 | |
1256 | /* When event_requeue() succeeds, worker->event is NULL, and event_free() handles NULL gracefully. */ | |
a505965d | 1257 | event_free(worker->event); |
912541b0 | 1258 | } |
e82e8fa5 | 1259 | |
8302fe5a TG |
1260 | /* we have free workers, try to schedule events */ |
1261 | event_queue_start(manager); | |
1262 | ||
e82e8fa5 TG |
1263 | return 1; |
1264 | } | |
1265 | ||
3b47c739 | 1266 | /* receive the udevd message from userspace */ |
e0d61dac | 1267 | static int on_ctrl_msg(UdevCtrl *uctrl, UdevCtrlMessageType type, const UdevCtrlMessageValue *value, void *userdata) { |
c0c6806b | 1268 | Manager *manager = userdata; |
d02c6f54 | 1269 | int r; |
912541b0 | 1270 | |
d02c6f54 | 1271 | assert(value); |
c0c6806b | 1272 | assert(manager); |
e4f66b77 | 1273 | |
d02c6f54 YW |
1274 | switch (type) { |
1275 | case UDEV_CTRL_SET_LOG_LEVEL: | |
64a3494c | 1276 | log_debug("Received udev control message (SET_LOG_LEVEL), setting log_level=%i", value->intval); |
3cc6b14a | 1277 | log_set_max_level(value->intval); |
1a0bd015 | 1278 | manager->log_level = value->intval; |
f257a8fc | 1279 | manager_kill_workers(manager, false); |
d02c6f54 YW |
1280 | break; |
1281 | case UDEV_CTRL_STOP_EXEC_QUEUE: | |
044497e2 | 1282 | log_debug("Received udev control message (STOP_EXEC_QUEUE)"); |
c0c6806b | 1283 | manager->stop_exec_queue = true; |
d02c6f54 YW |
1284 | break; |
1285 | case UDEV_CTRL_START_EXEC_QUEUE: | |
044497e2 | 1286 | log_debug("Received udev control message (START_EXEC_QUEUE)"); |
c0c6806b | 1287 | manager->stop_exec_queue = false; |
8302fe5a | 1288 | event_queue_start(manager); |
d02c6f54 YW |
1289 | break; |
1290 | case UDEV_CTRL_RELOAD: | |
044497e2 | 1291 | log_debug("Received udev control message (RELOAD)"); |
62d43dac | 1292 | manager_reload(manager); |
d02c6f54 YW |
1293 | break; |
1294 | case UDEV_CTRL_SET_ENV: { | |
d7ac0952 FS |
1295 | _unused_ _cleanup_free_ char *old_val = NULL; |
1296 | _cleanup_free_ char *key = NULL, *val = NULL, *old_key = NULL; | |
d02c6f54 | 1297 | const char *eq; |
9b5150b6 | 1298 | |
d02c6f54 | 1299 | eq = strchr(value->buf, '='); |
9b5150b6 | 1300 | if (!eq) { |
d02c6f54 | 1301 | log_error("Invalid key format '%s'", value->buf); |
9b5150b6 YW |
1302 | return 1; |
1303 | } | |
1304 | ||
d02c6f54 | 1305 | key = strndup(value->buf, eq - value->buf); |
9b5150b6 YW |
1306 | if (!key) { |
1307 | log_oom(); | |
1308 | return 1; | |
1309 | } | |
1310 | ||
1311 | old_val = hashmap_remove2(manager->properties, key, (void **) &old_key); | |
1312 | ||
1313 | r = hashmap_ensure_allocated(&manager->properties, &string_hash_ops); | |
1314 | if (r < 0) { | |
1315 | log_oom(); | |
1316 | return 1; | |
912541b0 | 1317 | } |
9b5150b6 YW |
1318 | |
1319 | eq++; | |
f053fc33 | 1320 | if (isempty(eq)) { |
044497e2 | 1321 | log_debug("Received udev control message (ENV), unsetting '%s'", key); |
9b5150b6 YW |
1322 | |
1323 | r = hashmap_put(manager->properties, key, NULL); | |
1324 | if (r < 0) { | |
1325 | log_oom(); | |
1326 | return 1; | |
1327 | } | |
1328 | } else { | |
1329 | val = strdup(eq); | |
1330 | if (!val) { | |
1331 | log_oom(); | |
1332 | return 1; | |
1333 | } | |
1334 | ||
044497e2 | 1335 | log_debug("Received udev control message (ENV), setting '%s=%s'", key, val); |
9b5150b6 YW |
1336 | |
1337 | r = hashmap_put(manager->properties, key, val); | |
1338 | if (r < 0) { | |
1339 | log_oom(); | |
1340 | return 1; | |
1341 | } | |
1342 | } | |
1343 | ||
1344 | key = val = NULL; | |
f257a8fc | 1345 | manager_kill_workers(manager, false); |
d02c6f54 | 1346 | break; |
912541b0 | 1347 | } |
d02c6f54 YW |
1348 | case UDEV_CTRL_SET_CHILDREN_MAX: |
1349 | if (value->intval <= 0) { | |
1350 | log_debug("Received invalid udev control message (SET_MAX_CHILDREN, %i), ignoring.", value->intval); | |
1351 | return 0; | |
1352 | } | |
912541b0 | 1353 | |
d02c6f54 YW |
1354 | log_debug("Received udev control message (SET_MAX_CHILDREN), setting children_max=%i", value->intval); |
1355 | arg_children_max = value->intval; | |
1ef72b55 | 1356 | |
4bf4f50f | 1357 | notify_ready(); |
d02c6f54 YW |
1358 | break; |
1359 | case UDEV_CTRL_PING: | |
d30f43ee | 1360 | log_debug("Received udev control message (PING)"); |
d02c6f54 YW |
1361 | break; |
1362 | case UDEV_CTRL_EXIT: | |
044497e2 | 1363 | log_debug("Received udev control message (EXIT)"); |
62d43dac | 1364 | manager_exit(manager); |
d02c6f54 YW |
1365 | break; |
1366 | default: | |
1367 | log_debug("Received unknown udev control message, ignoring"); | |
912541b0 | 1368 | } |
e4f66b77 | 1369 | |
e82e8fa5 | 1370 | return 1; |
88f4b648 | 1371 | } |
4a231017 | 1372 | |
25677a05 | 1373 | static int synthesize_change_one(sd_device *dev, sd_device *target) { |
0584b17a ZJS |
1374 | int r; |
1375 | ||
25677a05 YW |
1376 | if (DEBUG_LOGGING) { |
1377 | const char *syspath = NULL; | |
1378 | (void) sd_device_get_syspath(target, &syspath); | |
1379 | log_device_debug(dev, "device is closed, synthesising 'change' on %s", strna(syspath)); | |
1380 | } | |
1381 | ||
1382 | r = sd_device_trigger(target, SD_DEVICE_CHANGE); | |
0584b17a | 1383 | if (r < 0) |
25677a05 YW |
1384 | return log_device_debug_errno(target, r, "Failed to trigger 'change' uevent: %m"); |
1385 | ||
b428efa5 MS |
1386 | DEVICE_TRACE_POINT(synthetic_change_event, dev); |
1387 | ||
0584b17a ZJS |
1388 | return 0; |
1389 | } | |
1390 | ||
70068602 | 1391 | static int synthesize_change(sd_device *dev) { |
25677a05 | 1392 | const char *subsystem, *sysname, *devtype; |
f3a740a5 | 1393 | int r; |
edd32000 | 1394 | |
70068602 YW |
1395 | r = sd_device_get_subsystem(dev, &subsystem); |
1396 | if (r < 0) | |
1397 | return r; | |
1398 | ||
25677a05 | 1399 | r = sd_device_get_devtype(dev, &devtype); |
70068602 YW |
1400 | if (r < 0) |
1401 | return r; | |
1402 | ||
25677a05 | 1403 | r = sd_device_get_sysname(dev, &sysname); |
70068602 YW |
1404 | if (r < 0) |
1405 | return r; | |
1406 | ||
25677a05 YW |
1407 | if (streq_ptr(subsystem, "block") && |
1408 | streq_ptr(devtype, "disk") && | |
70068602 YW |
1409 | !startswith(sysname, "dm-")) { |
1410 | _cleanup_(sd_device_enumerator_unrefp) sd_device_enumerator *e = NULL; | |
1411 | bool part_table_read = false, has_partitions = false; | |
1412 | sd_device *d; | |
ede34445 | 1413 | int fd; |
f3a740a5 | 1414 | |
25677a05 YW |
1415 | /* Try to re-read the partition table. This only succeeds if none of the devices is |
1416 | * busy. The kernel returns 0 if no partition table is found, and we will not get an | |
1417 | * event for the disk. */ | |
78e278ad | 1418 | fd = sd_device_open(dev, O_RDONLY|O_CLOEXEC|O_NONBLOCK); |
ede34445 | 1419 | if (fd >= 0) { |
02ba8fb3 KS |
1420 | r = flock(fd, LOCK_EX|LOCK_NB); |
1421 | if (r >= 0) | |
1422 | r = ioctl(fd, BLKRRPART, 0); | |
1423 | ||
ede34445 KS |
1424 | close(fd); |
1425 | if (r >= 0) | |
e9fc29f4 | 1426 | part_table_read = true; |
ede34445 KS |
1427 | } |
1428 | ||
e9fc29f4 | 1429 | /* search for partitions */ |
70068602 | 1430 | r = sd_device_enumerator_new(&e); |
f3a740a5 KS |
1431 | if (r < 0) |
1432 | return r; | |
1433 | ||
70068602 | 1434 | r = sd_device_enumerator_allow_uninitialized(e); |
f3a740a5 KS |
1435 | if (r < 0) |
1436 | return r; | |
1437 | ||
70068602 | 1438 | r = sd_device_enumerator_add_match_parent(e, dev); |
47a3fa0f TA |
1439 | if (r < 0) |
1440 | return r; | |
e9fc29f4 | 1441 | |
70068602 YW |
1442 | r = sd_device_enumerator_add_match_subsystem(e, "block", true); |
1443 | if (r < 0) | |
1444 | return r; | |
e9fc29f4 | 1445 | |
70068602 YW |
1446 | FOREACH_DEVICE(e, d) { |
1447 | const char *t; | |
e9fc29f4 | 1448 | |
25677a05 | 1449 | if (sd_device_get_devtype(d, &t) < 0 || !streq(t, "partition")) |
e9fc29f4 KS |
1450 | continue; |
1451 | ||
1452 | has_partitions = true; | |
1453 | break; | |
1454 | } | |
1455 | ||
25677a05 YW |
1456 | /* We have partitions and re-read the table, the kernel already sent out a "change" |
1457 | * event for the disk, and "remove/add" for all partitions. */ | |
e9fc29f4 KS |
1458 | if (part_table_read && has_partitions) |
1459 | return 0; | |
1460 | ||
25677a05 YW |
1461 | /* We have partitions but re-reading the partition table did not work, synthesize |
1462 | * "change" for the disk and all partitions. */ | |
1463 | (void) synthesize_change_one(dev, dev); | |
e9fc29f4 | 1464 | |
70068602 | 1465 | FOREACH_DEVICE(e, d) { |
25677a05 | 1466 | const char *t; |
f3a740a5 | 1467 | |
25677a05 | 1468 | if (sd_device_get_devtype(d, &t) < 0 || !streq(t, "partition")) |
f3a740a5 KS |
1469 | continue; |
1470 | ||
25677a05 | 1471 | (void) synthesize_change_one(dev, d); |
f3a740a5 | 1472 | } |
ede34445 | 1473 | |
0584b17a | 1474 | } else |
25677a05 | 1475 | (void) synthesize_change_one(dev, dev); |
ede34445 | 1476 | |
f3a740a5 | 1477 | return 0; |
edd32000 KS |
1478 | } |
1479 | ||
e82e8fa5 | 1480 | static int on_inotify(sd_event_source *s, int fd, uint32_t revents, void *userdata) { |
c0c6806b | 1481 | Manager *manager = userdata; |
0254e944 | 1482 | union inotify_event_buffer buffer; |
f7c1ad4f | 1483 | ssize_t l; |
0725c4b9 | 1484 | int r; |
912541b0 | 1485 | |
c0c6806b | 1486 | assert(manager); |
e82e8fa5 | 1487 | |
0725c4b9 YW |
1488 | r = event_source_disable(manager->kill_workers_event); |
1489 | if (r < 0) | |
1490 | log_warning_errno(r, "Failed to disable event source for cleaning up idle workers, ignoring: %m"); | |
eca195ec | 1491 | |
e82e8fa5 | 1492 | l = read(fd, &buffer, sizeof(buffer)); |
f7c1ad4f | 1493 | if (l < 0) { |
8add30a0 | 1494 | if (ERRNO_IS_TRANSIENT(errno)) |
e82e8fa5 | 1495 | return 1; |
912541b0 | 1496 | |
f7c1ad4f | 1497 | return log_error_errno(errno, "Failed to read inotify fd: %m"); |
912541b0 KS |
1498 | } |
1499 | ||
00adc340 | 1500 | FOREACH_INOTIFY_EVENT_WARN(e, buffer, l) { |
70068602 YW |
1501 | _cleanup_(sd_device_unrefp) sd_device *dev = NULL; |
1502 | const char *devnode; | |
1503 | ||
e7f781e4 YW |
1504 | r = device_new_from_watch_handle(&dev, e->wd); |
1505 | if (r < 0) { | |
1506 | log_debug_errno(r, "Failed to create sd_device object from watch handle, ignoring: %m"); | |
70068602 | 1507 | continue; |
e7f781e4 | 1508 | } |
912541b0 | 1509 | |
70068602 | 1510 | if (sd_device_get_devname(dev, &devnode) < 0) |
edd32000 | 1511 | continue; |
912541b0 | 1512 | |
7fe3324c | 1513 | log_device_debug(dev, "Inotify event: %x for %s", e->mask, devnode); |
82a5de9f YW |
1514 | if (e->mask & IN_CLOSE_WRITE) { |
1515 | (void) event_queue_assume_block_device_unlocked(manager, dev); | |
e7f781e4 | 1516 | (void) synthesize_change(dev); |
82a5de9f | 1517 | } |
e7f781e4 YW |
1518 | |
1519 | /* Do not handle IN_IGNORED here. It should be handled by worker in 'remove' uevent; | |
1520 | * udev_event_execute_rules() -> event_execute_rules_on_remove() -> udev_watch_end(). */ | |
912541b0 KS |
1521 | } |
1522 | ||
e82e8fa5 | 1523 | return 1; |
bd284db1 SJR |
1524 | } |
1525 | ||
0561329d | 1526 | static int on_sigterm(sd_event_source *s, const struct signalfd_siginfo *si, void *userdata) { |
c0c6806b TG |
1527 | Manager *manager = userdata; |
1528 | ||
1529 | assert(manager); | |
1530 | ||
62d43dac | 1531 | manager_exit(manager); |
912541b0 | 1532 | |
e82e8fa5 TG |
1533 | return 1; |
1534 | } | |
912541b0 | 1535 | |
0561329d | 1536 | static int on_sighup(sd_event_source *s, const struct signalfd_siginfo *si, void *userdata) { |
c0c6806b TG |
1537 | Manager *manager = userdata; |
1538 | ||
1539 | assert(manager); | |
1540 | ||
62d43dac | 1541 | manager_reload(manager); |
912541b0 | 1542 | |
e82e8fa5 TG |
1543 | return 1; |
1544 | } | |
912541b0 | 1545 | |
e82e8fa5 | 1546 | static int on_sigchld(sd_event_source *s, const struct signalfd_siginfo *si, void *userdata) { |
c0c6806b | 1547 | Manager *manager = userdata; |
0725c4b9 | 1548 | int r; |
c0c6806b TG |
1549 | |
1550 | assert(manager); | |
1551 | ||
e82e8fa5 TG |
1552 | for (;;) { |
1553 | pid_t pid; | |
1554 | int status; | |
d9239923 | 1555 | Worker *worker; |
d1317d02 | 1556 | |
e82e8fa5 TG |
1557 | pid = waitpid(-1, &status, WNOHANG); |
1558 | if (pid <= 0) | |
f29328d6 | 1559 | break; |
e82e8fa5 | 1560 | |
4a0b58c4 | 1561 | worker = hashmap_get(manager->workers, PID_TO_PTR(pid)); |
e82e8fa5 | 1562 | if (!worker) { |
dc7faf2a | 1563 | log_warning("Worker ["PID_FMT"] is unknown, ignoring", pid); |
f29328d6 | 1564 | continue; |
912541b0 | 1565 | } |
e82e8fa5 TG |
1566 | |
1567 | if (WIFEXITED(status)) { | |
1568 | if (WEXITSTATUS(status) == 0) | |
dc7faf2a | 1569 | log_debug("Worker ["PID_FMT"] exited", pid); |
e82e8fa5 | 1570 | else |
dc7faf2a | 1571 | log_warning("Worker ["PID_FMT"] exited with return code %i", pid, WEXITSTATUS(status)); |
33ad742a | 1572 | } else if (WIFSIGNALED(status)) |
dc7faf2a | 1573 | log_warning("Worker ["PID_FMT"] terminated by signal %i (%s)", pid, WTERMSIG(status), signal_to_string(WTERMSIG(status))); |
33ad742a | 1574 | else if (WIFSTOPPED(status)) { |
dc7faf2a | 1575 | log_info("Worker ["PID_FMT"] stopped", pid); |
f29328d6 | 1576 | continue; |
e82e8fa5 | 1577 | } else if (WIFCONTINUED(status)) { |
dc7faf2a | 1578 | log_info("Worker ["PID_FMT"] continued", pid); |
f29328d6 | 1579 | continue; |
e82e8fa5 | 1580 | } else |
dc7faf2a | 1581 | log_warning("Worker ["PID_FMT"] exit with status 0x%04x", pid, status); |
e82e8fa5 | 1582 | |
05e6d9c6 | 1583 | if ((!WIFEXITED(status) || WEXITSTATUS(status) != 0) && worker->event) { |
eb546b35 | 1584 | log_device_error(worker->event->dev, "Worker ["PID_FMT"] failed", pid); |
dc7faf2a | 1585 | |
05e6d9c6 | 1586 | /* delete state from disk */ |
eb546b35 YW |
1587 | device_delete_db(worker->event->dev); |
1588 | device_tag_index(worker->event->dev, NULL, false); | |
dc7faf2a | 1589 | |
c17ab900 | 1590 | /* Forward kernel event to libudev listeners */ |
6467bda5 YW |
1591 | device_broadcast(manager->monitor, worker->event->dev, |
1592 | WIFEXITED(status) ? EVENT_RESULT_EXIT_STATUS_BASE + WEXITSTATUS(status): | |
1593 | WIFSIGNALED(status) ? EVENT_RESULT_SIGNAL_BASE + WTERMSIG(status) : 0); | |
e82e8fa5 TG |
1594 | } |
1595 | ||
1596 | worker_free(worker); | |
912541b0 | 1597 | } |
e82e8fa5 | 1598 | |
8302fe5a TG |
1599 | /* we can start new workers, try to schedule events */ |
1600 | event_queue_start(manager); | |
1601 | ||
eca195ec | 1602 | /* Disable unnecessary cleanup event */ |
0725c4b9 YW |
1603 | if (hashmap_isempty(manager->workers)) { |
1604 | r = event_source_disable(manager->kill_workers_event); | |
1605 | if (r < 0) | |
1606 | log_warning_errno(r, "Failed to disable event source for cleaning up idle workers, ignoring: %m"); | |
1607 | } | |
eca195ec | 1608 | |
e82e8fa5 | 1609 | return 1; |
f27125f9 | 1610 | } |
1611 | ||
693d371d TG |
1612 | static int on_post(sd_event_source *s, void *userdata) { |
1613 | Manager *manager = userdata; | |
693d371d TG |
1614 | |
1615 | assert(manager); | |
1616 | ||
5d354e52 YW |
1617 | if (!LIST_IS_EMPTY(manager->events)) { |
1618 | /* Try to process pending events if idle workers exist. Why is this necessary? | |
1619 | * When a worker finished an event and became idle, even if there was a pending event, | |
1620 | * the corresponding device might have been locked and the processing of the event | |
1621 | * delayed for a while, preventing the worker from processing the event immediately. | |
1622 | * Now, the device may be unlocked. Let's try again! */ | |
1623 | event_queue_start(manager); | |
b6107f01 | 1624 | return 1; |
5d354e52 | 1625 | } |
b6107f01 | 1626 | |
40293280 YW |
1627 | /* There are no queued events. Let's remove /run/udev/queue and clean up the idle processes. */ |
1628 | ||
1629 | if (unlink("/run/udev/queue") < 0) { | |
1630 | if (errno != ENOENT) | |
1631 | log_warning_errno(errno, "Failed to unlink /run/udev/queue, ignoring: %m"); | |
1632 | } else | |
1633 | log_debug("No events are queued, removing /run/udev/queue."); | |
b6107f01 YW |
1634 | |
1635 | if (!hashmap_isempty(manager->workers)) { | |
1636 | /* There are idle workers */ | |
6d63048a YW |
1637 | (void) event_reset_time(manager->event, &manager->kill_workers_event, CLOCK_MONOTONIC, |
1638 | now(CLOCK_MONOTONIC) + 3 * USEC_PER_SEC, USEC_PER_SEC, | |
1639 | on_kill_workers_event, manager, 0, "kill-workers-event", false); | |
b6107f01 | 1640 | return 1; |
693d371d TG |
1641 | } |
1642 | ||
b6107f01 YW |
1643 | /* There are no idle workers. */ |
1644 | ||
1645 | if (manager->exit) | |
1646 | return sd_event_exit(manager->event, 0); | |
1647 | ||
42670846 YW |
1648 | if (manager->cgroup) |
1649 | /* cleanup possible left-over processes in our cgroup */ | |
1650 | (void) cg_kill(SYSTEMD_CGROUP_CONTROLLER, manager->cgroup, SIGKILL, CGROUP_IGNORE_SELF, NULL, NULL, NULL); | |
b6107f01 | 1651 | |
693d371d TG |
1652 | return 1; |
1653 | } | |
1654 | ||
c4b69e99 | 1655 | static int listen_fds(int *ret_ctrl, int *ret_netlink) { |
fcff1e72 | 1656 | int ctrl_fd = -1, netlink_fd = -1; |
c4b69e99 | 1657 | int fd, n; |
912541b0 | 1658 | |
c4b69e99 YW |
1659 | assert(ret_ctrl); |
1660 | assert(ret_netlink); | |
fcff1e72 | 1661 | |
912541b0 | 1662 | n = sd_listen_fds(true); |
fcff1e72 TG |
1663 | if (n < 0) |
1664 | return n; | |
912541b0 KS |
1665 | |
1666 | for (fd = SD_LISTEN_FDS_START; fd < n + SD_LISTEN_FDS_START; fd++) { | |
c52cff07 | 1667 | if (sd_is_socket(fd, AF_LOCAL, SOCK_SEQPACKET, -1) > 0) { |
fcff1e72 TG |
1668 | if (ctrl_fd >= 0) |
1669 | return -EINVAL; | |
1670 | ctrl_fd = fd; | |
912541b0 KS |
1671 | continue; |
1672 | } | |
1673 | ||
c52cff07 | 1674 | if (sd_is_socket(fd, AF_NETLINK, SOCK_RAW, -1) > 0) { |
fcff1e72 TG |
1675 | if (netlink_fd >= 0) |
1676 | return -EINVAL; | |
1677 | netlink_fd = fd; | |
912541b0 KS |
1678 | continue; |
1679 | } | |
1680 | ||
fcff1e72 | 1681 | return -EINVAL; |
912541b0 KS |
1682 | } |
1683 | ||
c4b69e99 YW |
1684 | *ret_ctrl = ctrl_fd; |
1685 | *ret_netlink = netlink_fd; | |
912541b0 | 1686 | |
912541b0 | 1687 | return 0; |
7459bcdc KS |
1688 | } |
1689 | ||
e6f86cac | 1690 | /* |
3f85ef0f | 1691 | * read the kernel command line, in case we need to get into debug mode |
64a3494c | 1692 | * udev.log_level=<level> syslog priority |
1d84ad94 LP |
1693 | * udev.children_max=<number of workers> events are fully serialized if set to 1 |
1694 | * udev.exec_delay=<number of seconds> delay execution of every executed program | |
1695 | * udev.event_timeout=<number of seconds> seconds to wait before terminating an event | |
95ac5230 | 1696 | * udev.blockdev_read_only<=bool> mark all block devices read-only when they appear |
e6f86cac | 1697 | */ |
96287a49 | 1698 | static int parse_proc_cmdline_item(const char *key, const char *value, void *data) { |
95ac5230 | 1699 | int r; |
e6f86cac | 1700 | |
614a823c | 1701 | assert(key); |
e6f86cac | 1702 | |
64a3494c FB |
1703 | if (proc_cmdline_key_streq(key, "udev.log_level") || |
1704 | proc_cmdline_key_streq(key, "udev.log_priority")) { /* kept for backward compatibility */ | |
1d84ad94 LP |
1705 | |
1706 | if (proc_cmdline_value_missing(key, value)) | |
1707 | return 0; | |
1708 | ||
46f0fbd8 | 1709 | r = log_level_from_string(value); |
92e72467 ZJS |
1710 | if (r >= 0) |
1711 | log_set_max_level(r); | |
1d84ad94 LP |
1712 | |
1713 | } else if (proc_cmdline_key_streq(key, "udev.event_timeout")) { | |
1714 | ||
1715 | if (proc_cmdline_value_missing(key, value)) | |
1716 | return 0; | |
1717 | ||
9d9264ba | 1718 | r = parse_sec(value, &arg_event_timeout_usec); |
1d84ad94 LP |
1719 | |
1720 | } else if (proc_cmdline_key_streq(key, "udev.children_max")) { | |
1721 | ||
1722 | if (proc_cmdline_value_missing(key, value)) | |
1723 | return 0; | |
1724 | ||
020328e1 | 1725 | r = safe_atou(value, &arg_children_max); |
1d84ad94 LP |
1726 | |
1727 | } else if (proc_cmdline_key_streq(key, "udev.exec_delay")) { | |
1728 | ||
1729 | if (proc_cmdline_value_missing(key, value)) | |
1730 | return 0; | |
1731 | ||
6b92f429 | 1732 | r = parse_sec(value, &arg_exec_delay_usec); |
1d84ad94 | 1733 | |
e2099267 | 1734 | } else if (proc_cmdline_key_streq(key, "udev.timeout_signal")) { |
95ac5230 | 1735 | |
e2099267 MS |
1736 | if (proc_cmdline_value_missing(key, value)) |
1737 | return 0; | |
1738 | ||
1739 | r = signal_from_string(value); | |
1740 | if (r > 0) | |
1741 | arg_timeout_signal = r; | |
95ac5230 LP |
1742 | |
1743 | } else if (proc_cmdline_key_streq(key, "udev.blockdev_read_only")) { | |
1744 | ||
1745 | if (!value) | |
1746 | arg_blockdev_read_only = true; | |
1747 | else { | |
1748 | r = parse_boolean(value); | |
1749 | if (r < 0) | |
1750 | log_warning_errno(r, "Failed to parse udev.blockdev-read-only argument, ignoring: %s", value); | |
1751 | else | |
1752 | arg_blockdev_read_only = r; | |
1753 | } | |
1754 | ||
1755 | if (arg_blockdev_read_only) | |
1756 | log_notice("All physical block devices will be marked read-only."); | |
1757 | ||
1758 | return 0; | |
1759 | ||
1760 | } else { | |
1761 | if (startswith(key, "udev.")) | |
1762 | log_warning("Unknown udev kernel command line option \"%s\", ignoring.", key); | |
1763 | ||
1764 | return 0; | |
1765 | } | |
614a823c | 1766 | |
92e72467 ZJS |
1767 | if (r < 0) |
1768 | log_warning_errno(r, "Failed to parse \"%s=%s\", ignoring: %m", key, value); | |
1d84ad94 | 1769 | |
614a823c | 1770 | return 0; |
e6f86cac KS |
1771 | } |
1772 | ||
37ec0fdd LP |
1773 | static int help(void) { |
1774 | _cleanup_free_ char *link = NULL; | |
1775 | int r; | |
1776 | ||
1777 | r = terminal_urlify_man("systemd-udevd.service", "8", &link); | |
1778 | if (r < 0) | |
1779 | return log_oom(); | |
1780 | ||
ed216e1f | 1781 | printf("%s [OPTIONS...]\n\n" |
d1109e12 | 1782 | "Rule-based manager for device events and files.\n\n" |
5ac0162c | 1783 | " -h --help Print this message\n" |
2d19c17e MF |
1784 | " -V --version Print version of the program\n" |
1785 | " -d --daemon Detach and run in the background\n" | |
1786 | " -D --debug Enable debug output\n" | |
1787 | " -c --children-max=INT Set maximum number of workers\n" | |
1788 | " -e --exec-delay=SECONDS Seconds to wait before executing RUN=\n" | |
1789 | " -t --event-timeout=SECONDS Seconds to wait before terminating an event\n" | |
1790 | " -N --resolve-names=early|late|never\n" | |
5ac0162c | 1791 | " When to resolve users and groups\n" |
bc556335 DDM |
1792 | "\nSee the %s for details.\n", |
1793 | program_invocation_short_name, | |
1794 | link); | |
37ec0fdd LP |
1795 | |
1796 | return 0; | |
ed216e1f TG |
1797 | } |
1798 | ||
bba7a484 | 1799 | static int parse_argv(int argc, char *argv[]) { |
e2099267 MS |
1800 | enum { |
1801 | ARG_TIMEOUT_SIGNAL, | |
1802 | }; | |
1803 | ||
912541b0 | 1804 | static const struct option options[] = { |
e2099267 MS |
1805 | { "daemon", no_argument, NULL, 'd' }, |
1806 | { "debug", no_argument, NULL, 'D' }, | |
1807 | { "children-max", required_argument, NULL, 'c' }, | |
1808 | { "exec-delay", required_argument, NULL, 'e' }, | |
1809 | { "event-timeout", required_argument, NULL, 't' }, | |
1810 | { "resolve-names", required_argument, NULL, 'N' }, | |
1811 | { "help", no_argument, NULL, 'h' }, | |
1812 | { "version", no_argument, NULL, 'V' }, | |
1813 | { "timeout-signal", required_argument, NULL, ARG_TIMEOUT_SIGNAL }, | |
912541b0 KS |
1814 | {} |
1815 | }; | |
689a97f5 | 1816 | |
044497e2 | 1817 | int c, r; |
689a97f5 | 1818 | |
bba7a484 TG |
1819 | assert(argc >= 0); |
1820 | assert(argv); | |
912541b0 | 1821 | |
e14b6f21 | 1822 | while ((c = getopt_long(argc, argv, "c:de:Dt:N:hV", options, NULL)) >= 0) { |
bba7a484 | 1823 | switch (c) { |
912541b0 | 1824 | |
912541b0 | 1825 | case 'd': |
bba7a484 | 1826 | arg_daemonize = true; |
912541b0 KS |
1827 | break; |
1828 | case 'c': | |
020328e1 | 1829 | r = safe_atou(optarg, &arg_children_max); |
6f5cf8a8 | 1830 | if (r < 0) |
389f9bf2 | 1831 | log_warning_errno(r, "Failed to parse --children-max= value '%s', ignoring: %m", optarg); |
912541b0 KS |
1832 | break; |
1833 | case 'e': | |
6b92f429 | 1834 | r = parse_sec(optarg, &arg_exec_delay_usec); |
6f5cf8a8 | 1835 | if (r < 0) |
6b92f429 | 1836 | log_warning_errno(r, "Failed to parse --exec-delay= value '%s', ignoring: %m", optarg); |
912541b0 | 1837 | break; |
e2099267 MS |
1838 | case ARG_TIMEOUT_SIGNAL: |
1839 | r = signal_from_string(optarg); | |
1840 | if (r <= 0) | |
1841 | log_warning_errno(r, "Failed to parse --timeout-signal= value '%s', ignoring: %m", optarg); | |
1842 | else | |
1843 | arg_timeout_signal = r; | |
1844 | ||
1845 | break; | |
9719859c | 1846 | case 't': |
9d9264ba | 1847 | r = parse_sec(optarg, &arg_event_timeout_usec); |
f1e8664e | 1848 | if (r < 0) |
9d9264ba | 1849 | log_warning_errno(r, "Failed to parse --event-timeout= value '%s', ignoring: %m", optarg); |
9719859c | 1850 | break; |
912541b0 | 1851 | case 'D': |
bba7a484 | 1852 | arg_debug = true; |
912541b0 | 1853 | break; |
c4d44cba YW |
1854 | case 'N': { |
1855 | ResolveNameTiming t; | |
1856 | ||
1857 | t = resolve_name_timing_from_string(optarg); | |
1858 | if (t < 0) | |
1859 | log_warning("Invalid --resolve-names= value '%s', ignoring.", optarg); | |
1860 | else | |
1861 | arg_resolve_name_timing = t; | |
912541b0 | 1862 | break; |
c4d44cba | 1863 | } |
912541b0 | 1864 | case 'h': |
37ec0fdd | 1865 | return help(); |
912541b0 | 1866 | case 'V': |
681bd2c5 | 1867 | printf("%s\n", GIT_VERSION); |
bba7a484 TG |
1868 | return 0; |
1869 | case '?': | |
1870 | return -EINVAL; | |
912541b0 | 1871 | default: |
04499a70 | 1872 | assert_not_reached(); |
bba7a484 | 1873 | |
912541b0 KS |
1874 | } |
1875 | } | |
1876 | ||
bba7a484 TG |
1877 | return 1; |
1878 | } | |
1879 | ||
a1f4fd38 YW |
1880 | static int create_subcgroup(char **ret) { |
1881 | _cleanup_free_ char *cgroup = NULL, *subcgroup = NULL; | |
1882 | int r; | |
1883 | ||
1884 | if (getppid() != 1) | |
1885 | return log_debug_errno(SYNTHETIC_ERRNO(EOPNOTSUPP), "Not invoked by PID1."); | |
1886 | ||
1887 | r = sd_booted(); | |
1888 | if (r < 0) | |
1889 | return log_debug_errno(r, "Failed to check if systemd is running: %m"); | |
1890 | if (r == 0) | |
1891 | return log_debug_errno(SYNTHETIC_ERRNO(EOPNOTSUPP), "systemd is not running."); | |
1892 | ||
1893 | /* Get our own cgroup, we regularly kill everything udev has left behind. | |
1894 | * We only do this on systemd systems, and only if we are directly spawned | |
1895 | * by PID1. Otherwise we are not guaranteed to have a dedicated cgroup. */ | |
1896 | ||
1897 | r = cg_pid_get_path(SYSTEMD_CGROUP_CONTROLLER, 0, &cgroup); | |
1898 | if (r < 0) { | |
1899 | if (IN_SET(r, -ENOENT, -ENOMEDIUM)) | |
1900 | return log_debug_errno(r, "Dedicated cgroup not found: %m"); | |
1901 | return log_debug_errno(r, "Failed to get cgroup: %m"); | |
1902 | } | |
1903 | ||
1904 | r = cg_get_xattr_bool(SYSTEMD_CGROUP_CONTROLLER, cgroup, "trusted.delegate"); | |
1905 | if (IN_SET(r, 0, -ENODATA)) | |
1906 | return log_debug_errno(SYNTHETIC_ERRNO(EOPNOTSUPP), "The cgroup %s is not delegated to us.", cgroup); | |
1907 | if (r < 0) | |
1908 | return log_debug_errno(r, "Failed to read trusted.delegate attribute: %m"); | |
1909 | ||
1910 | /* We are invoked with our own delegated cgroup tree, let's move us one level down, so that we | |
1911 | * don't collide with the "no processes in inner nodes" rule of cgroups, when the service | |
1912 | * manager invokes the ExecReload= job in the .control/ subcgroup. */ | |
1913 | ||
1914 | subcgroup = path_join(cgroup, "/udev"); | |
1915 | if (!subcgroup) | |
1916 | return log_oom_debug(); | |
1917 | ||
1918 | r = cg_create_and_attach(SYSTEMD_CGROUP_CONTROLLER, subcgroup, 0); | |
1919 | if (r < 0) | |
1920 | return log_debug_errno(r, "Failed to create %s subcgroup: %m", subcgroup); | |
1921 | ||
1922 | log_debug("Created %s subcgroup.", subcgroup); | |
1923 | if (ret) | |
1924 | *ret = TAKE_PTR(subcgroup); | |
1925 | return 0; | |
1926 | } | |
1927 | ||
1928 | static int manager_new(Manager **ret, int fd_ctrl, int fd_uevent) { | |
c0c6806b | 1929 | _cleanup_(manager_freep) Manager *manager = NULL; |
a1f4fd38 | 1930 | _cleanup_free_ char *cgroup = NULL; |
b5af8c8c | 1931 | int r; |
c0c6806b TG |
1932 | |
1933 | assert(ret); | |
1934 | ||
a1f4fd38 YW |
1935 | (void) create_subcgroup(&cgroup); |
1936 | ||
6f19b42f | 1937 | manager = new(Manager, 1); |
c0c6806b TG |
1938 | if (!manager) |
1939 | return log_oom(); | |
1940 | ||
6f19b42f | 1941 | *manager = (Manager) { |
df7ee959 | 1942 | .inotify_fd = -1, |
6f19b42f | 1943 | .worker_watch = { -1, -1 }, |
a1f4fd38 | 1944 | .cgroup = TAKE_PTR(cgroup), |
6f19b42f | 1945 | }; |
e237d8cb | 1946 | |
100bc5bf YW |
1947 | r = udev_ctrl_new_from_fd(&manager->ctrl, fd_ctrl); |
1948 | if (r < 0) | |
1949 | return log_error_errno(r, "Failed to initialize udev control socket: %m"); | |
e237d8cb | 1950 | |
b5af8c8c ZJS |
1951 | r = udev_ctrl_enable_receiving(manager->ctrl); |
1952 | if (r < 0) | |
1953 | return log_error_errno(r, "Failed to bind udev control socket: %m"); | |
c4b69e99 | 1954 | |
7f2e3a14 YW |
1955 | r = device_monitor_new_full(&manager->monitor, MONITOR_GROUP_KERNEL, fd_uevent); |
1956 | if (r < 0) | |
1957 | return log_error_errno(r, "Failed to initialize device monitor: %m"); | |
e237d8cb | 1958 | |
1ffadeaa FB |
1959 | /* Bump receiver buffer, but only if we are not called via socket activation, as in that |
1960 | * case systemd sets the receive buffer size for us, and the value in the .socket unit | |
1961 | * should take full effect. */ | |
e77f52e5 YW |
1962 | if (fd_uevent < 0) { |
1963 | r = sd_device_monitor_set_receive_buffer_size(manager->monitor, 128 * 1024 * 1024); | |
1964 | if (r < 0) | |
1965 | log_warning_errno(r, "Failed to set receive buffer size for device monitor, ignoring: %m"); | |
1966 | } | |
c4b69e99 | 1967 | |
b5af8c8c ZJS |
1968 | r = device_monitor_enable_receiving(manager->monitor); |
1969 | if (r < 0) | |
1970 | return log_error_errno(r, "Failed to bind netlink socket: %m"); | |
1971 | ||
1a0bd015 YW |
1972 | manager->log_level = log_get_max_level(); |
1973 | ||
b5af8c8c ZJS |
1974 | *ret = TAKE_PTR(manager); |
1975 | ||
1976 | return 0; | |
1977 | } | |
1978 | ||
1979 | static int main_loop(Manager *manager) { | |
d02c6f54 | 1980 | int fd_worker, r; |
b5af8c8c | 1981 | |
76e62a4d YW |
1982 | manager->pid = getpid_cached(); |
1983 | ||
e237d8cb TG |
1984 | /* unnamed socket from workers to the main daemon */ |
1985 | r = socketpair(AF_LOCAL, SOCK_DGRAM|SOCK_CLOEXEC, 0, manager->worker_watch); | |
1986 | if (r < 0) | |
044497e2 | 1987 | return log_error_errno(errno, "Failed to create socketpair for communicating with workers: %m"); |
e237d8cb | 1988 | |
693d371d | 1989 | fd_worker = manager->worker_watch[READ_END]; |
e237d8cb | 1990 | |
2ff48e98 | 1991 | r = setsockopt_int(fd_worker, SOL_SOCKET, SO_PASSCRED, true); |
e237d8cb | 1992 | if (r < 0) |
044497e2 | 1993 | return log_error_errno(r, "Failed to enable SO_PASSCRED: %m"); |
e237d8cb | 1994 | |
df7ee959 YW |
1995 | manager->inotify_fd = inotify_init1(IN_CLOEXEC); |
1996 | if (manager->inotify_fd < 0) | |
1997 | return log_error_errno(errno, "Failed to create inotify descriptor: %m"); | |
e237d8cb | 1998 | |
df7ee959 | 1999 | udev_watch_restore(manager->inotify_fd); |
e237d8cb TG |
2000 | |
2001 | /* block and listen to all signals on signalfd */ | |
72c0a2c2 | 2002 | assert_se(sigprocmask_many(SIG_BLOCK, NULL, SIGTERM, SIGINT, SIGHUP, SIGCHLD, -1) >= 0); |
693d371d | 2003 | |
49f997f3 TG |
2004 | r = sd_event_default(&manager->event); |
2005 | if (r < 0) | |
044497e2 | 2006 | return log_error_errno(r, "Failed to allocate event loop: %m"); |
49f997f3 | 2007 | |
693d371d TG |
2008 | r = sd_event_add_signal(manager->event, NULL, SIGINT, on_sigterm, manager); |
2009 | if (r < 0) | |
044497e2 | 2010 | return log_error_errno(r, "Failed to create SIGINT event source: %m"); |
693d371d TG |
2011 | |
2012 | r = sd_event_add_signal(manager->event, NULL, SIGTERM, on_sigterm, manager); | |
2013 | if (r < 0) | |
044497e2 | 2014 | return log_error_errno(r, "Failed to create SIGTERM event source: %m"); |
693d371d TG |
2015 | |
2016 | r = sd_event_add_signal(manager->event, NULL, SIGHUP, on_sighup, manager); | |
2017 | if (r < 0) | |
044497e2 | 2018 | return log_error_errno(r, "Failed to create SIGHUP event source: %m"); |
693d371d TG |
2019 | |
2020 | r = sd_event_add_signal(manager->event, NULL, SIGCHLD, on_sigchld, manager); | |
2021 | if (r < 0) | |
044497e2 | 2022 | return log_error_errno(r, "Failed to create SIGCHLD event source: %m"); |
693d371d TG |
2023 | |
2024 | r = sd_event_set_watchdog(manager->event, true); | |
2025 | if (r < 0) | |
044497e2 | 2026 | return log_error_errno(r, "Failed to create watchdog event source: %m"); |
693d371d | 2027 | |
d02c6f54 YW |
2028 | r = udev_ctrl_attach_event(manager->ctrl, manager->event); |
2029 | if (r < 0) | |
2030 | return log_error_errno(r, "Failed to attach event to udev control: %m"); | |
b5af8c8c | 2031 | |
d02c6f54 | 2032 | r = udev_ctrl_start(manager->ctrl, on_ctrl_msg, manager); |
693d371d | 2033 | if (r < 0) |
d02c6f54 | 2034 | return log_error_errno(r, "Failed to start device monitor: %m"); |
693d371d TG |
2035 | |
2036 | /* This needs to be after the inotify and uevent handling, to make sure | |
2037 | * that the ping is send back after fully processing the pending uevents | |
2038 | * (including the synthetic ones we may create due to inotify events). | |
2039 | */ | |
d02c6f54 | 2040 | r = sd_event_source_set_priority(udev_ctrl_get_event_source(manager->ctrl), SD_EVENT_PRIORITY_IDLE); |
693d371d | 2041 | if (r < 0) |
044497e2 | 2042 | return log_error_errno(r, "Failed to set IDLE event priority for udev control event source: %m"); |
693d371d | 2043 | |
df7ee959 | 2044 | r = sd_event_add_io(manager->event, &manager->inotify_event, manager->inotify_fd, EPOLLIN, on_inotify, manager); |
693d371d | 2045 | if (r < 0) |
044497e2 | 2046 | return log_error_errno(r, "Failed to create inotify event source: %m"); |
693d371d | 2047 | |
f00d2b6d YW |
2048 | r = sd_device_monitor_attach_event(manager->monitor, manager->event); |
2049 | if (r < 0) | |
2050 | return log_error_errno(r, "Failed to attach event to device monitor: %m"); | |
2051 | ||
2052 | r = sd_device_monitor_start(manager->monitor, on_uevent, manager); | |
693d371d | 2053 | if (r < 0) |
f00d2b6d YW |
2054 | return log_error_errno(r, "Failed to start device monitor: %m"); |
2055 | ||
2056 | (void) sd_event_source_set_description(sd_device_monitor_get_event_source(manager->monitor), "device-monitor"); | |
693d371d TG |
2057 | |
2058 | r = sd_event_add_io(manager->event, NULL, fd_worker, EPOLLIN, on_worker, manager); | |
2059 | if (r < 0) | |
044497e2 | 2060 | return log_error_errno(r, "Failed to create worker event source: %m"); |
693d371d TG |
2061 | |
2062 | r = sd_event_add_post(manager->event, NULL, on_post, manager); | |
2063 | if (r < 0) | |
044497e2 | 2064 | return log_error_errno(r, "Failed to create post event source: %m"); |
e237d8cb | 2065 | |
b5af8c8c | 2066 | udev_builtin_init(); |
077fc5e2 | 2067 | |
c238a1f5 | 2068 | r = udev_rules_load(&manager->rules, arg_resolve_name_timing); |
b5af8c8c ZJS |
2069 | if (!manager->rules) |
2070 | return log_error_errno(r, "Failed to read udev rules: %m"); | |
077fc5e2 DH |
2071 | |
2072 | r = udev_rules_apply_static_dev_perms(manager->rules); | |
2073 | if (r < 0) | |
044497e2 | 2074 | log_error_errno(r, "Failed to apply permissions on static device nodes: %m"); |
077fc5e2 | 2075 | |
4bf4f50f | 2076 | notify_ready(); |
077fc5e2 DH |
2077 | |
2078 | r = sd_event_loop(manager->event); | |
44dcf454 | 2079 | if (r < 0) |
044497e2 | 2080 | log_error_errno(r, "Event loop failed: %m"); |
077fc5e2 | 2081 | |
077fc5e2 DH |
2082 | sd_notify(false, |
2083 | "STOPPING=1\n" | |
2084 | "STATUS=Shutting down..."); | |
077fc5e2 DH |
2085 | return r; |
2086 | } | |
2087 | ||
63e2d171 | 2088 | int run_udevd(int argc, char *argv[]) { |
b5af8c8c | 2089 | _cleanup_(manager_freep) Manager *manager = NULL; |
efa1606e | 2090 | int fd_ctrl = -1, fd_uevent = -1; |
e5d7bce1 | 2091 | int r; |
bba7a484 | 2092 | |
bba7a484 | 2093 | log_set_target(LOG_TARGET_AUTO); |
6b413782 | 2094 | log_open(); |
e2099267 | 2095 | udev_parse_config_full(&arg_children_max, &arg_exec_delay_usec, &arg_event_timeout_usec, &arg_resolve_name_timing, &arg_timeout_signal); |
bba7a484 | 2096 | log_parse_environment(); |
6b413782 | 2097 | log_open(); /* Done again to update after reading configuration. */ |
bba7a484 | 2098 | |
bba7a484 TG |
2099 | r = parse_argv(argc, argv); |
2100 | if (r <= 0) | |
0c5a109a | 2101 | return r; |
bba7a484 | 2102 | |
1d84ad94 | 2103 | r = proc_cmdline_parse(parse_proc_cmdline_item, NULL, PROC_CMDLINE_STRIP_RD_PREFIX); |
614a823c | 2104 | if (r < 0) |
044497e2 | 2105 | log_warning_errno(r, "Failed to parse kernel command line, ignoring: %m"); |
912541b0 | 2106 | |
78d3e041 KS |
2107 | if (arg_debug) { |
2108 | log_set_target(LOG_TARGET_CONSOLE); | |
bba7a484 | 2109 | log_set_max_level(LOG_DEBUG); |
78d3e041 | 2110 | } |
bba7a484 | 2111 | |
fba868fa LP |
2112 | r = must_be_root(); |
2113 | if (r < 0) | |
0c5a109a | 2114 | return r; |
912541b0 | 2115 | |
712cebf1 | 2116 | if (arg_children_max == 0) { |
fe56acd8 | 2117 | unsigned long cpu_limit, mem_limit, cpu_count = 1; |
d457ff83 | 2118 | |
fe56acd8 LP |
2119 | r = cpus_in_affinity_mask(); |
2120 | if (r < 0) | |
2121 | log_warning_errno(r, "Failed to determine number of local CPUs, ignoring: %m"); | |
2122 | else | |
2123 | cpu_count = r; | |
88bd5a32 FB |
2124 | |
2125 | cpu_limit = cpu_count * 2 + 16; | |
2126 | mem_limit = MAX(physical_memory() / (128UL*1024*1024), 10U); | |
912541b0 | 2127 | |
88bd5a32 FB |
2128 | arg_children_max = MIN(cpu_limit, mem_limit); |
2129 | arg_children_max = MIN(WORKER_NUM_MAX, arg_children_max); | |
e438c57a | 2130 | |
044497e2 | 2131 | log_debug("Set children_max to %u", arg_children_max); |
d457ff83 | 2132 | } |
912541b0 | 2133 | |
712cebf1 | 2134 | /* set umask before creating any file/directory */ |
712cebf1 | 2135 | umask(022); |
912541b0 | 2136 | |
c3dacc8b | 2137 | r = mac_selinux_init(); |
0c5a109a | 2138 | if (r < 0) |
a9ba0e32 | 2139 | return r; |
912541b0 | 2140 | |
3f692e2e | 2141 | r = RET_NERRNO(mkdir("/run/udev", 0755)); |
0c5a109a ZJS |
2142 | if (r < 0 && r != -EEXIST) |
2143 | return log_error_errno(r, "Failed to create /run/udev: %m"); | |
712cebf1 | 2144 | |
b7f74dd4 | 2145 | r = listen_fds(&fd_ctrl, &fd_uevent); |
0c5a109a ZJS |
2146 | if (r < 0) |
2147 | return log_error_errno(r, "Failed to listen on fds: %m"); | |
b7f74dd4 | 2148 | |
a1f4fd38 | 2149 | r = manager_new(&manager, fd_ctrl, fd_uevent); |
b5af8c8c ZJS |
2150 | if (r < 0) |
2151 | return log_error_errno(r, "Failed to create manager: %m"); | |
2152 | ||
bba7a484 | 2153 | if (arg_daemonize) { |
912541b0 | 2154 | pid_t pid; |
912541b0 | 2155 | |
b5af8c8c | 2156 | log_info("Starting version " GIT_VERSION); |
3cbb2057 | 2157 | |
40e749b5 | 2158 | /* connect /dev/null to stdin, stdout, stderr */ |
c76cf844 AK |
2159 | if (log_get_max_level() < LOG_DEBUG) { |
2160 | r = make_null_stdio(); | |
2161 | if (r < 0) | |
2162 | log_warning_errno(r, "Failed to redirect standard streams to /dev/null: %m"); | |
2163 | } | |
2164 | ||
912541b0 | 2165 | pid = fork(); |
0c5a109a ZJS |
2166 | if (pid < 0) |
2167 | return log_error_errno(errno, "Failed to fork daemon: %m"); | |
2168 | if (pid > 0) | |
2169 | /* parent */ | |
2170 | return 0; | |
912541b0 | 2171 | |
0c5a109a | 2172 | /* child */ |
ece0fe12 | 2173 | (void) setsid(); |
7500cd5e | 2174 | } |
912541b0 | 2175 | |
76e62a4d | 2176 | return main_loop(manager); |
7fafc032 | 2177 | } |