]>
Commit | Line | Data |
---|---|---|
e7145211 | 1 | /* SPDX-License-Identifier: GPL-2.0+ */ |
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> | |
11 | #include <signal.h> | |
12 | #include <stdbool.h> | |
13 | #include <stddef.h> | |
7fafc032 KS |
14 | #include <stdio.h> |
15 | #include <stdlib.h> | |
16 | #include <string.h> | |
618234a5 | 17 | #include <sys/epoll.h> |
3ebdb81e | 18 | #include <sys/file.h> |
618234a5 LP |
19 | #include <sys/inotify.h> |
20 | #include <sys/ioctl.h> | |
21 | #include <sys/mount.h> | |
1e03b754 | 22 | #include <sys/prctl.h> |
1e03b754 | 23 | #include <sys/signalfd.h> |
618234a5 | 24 | #include <sys/socket.h> |
dc117daa | 25 | #include <sys/stat.h> |
618234a5 LP |
26 | #include <sys/time.h> |
27 | #include <sys/wait.h> | |
28 | #include <unistd.h> | |
7fafc032 | 29 | |
392ef7a2 | 30 | #include "sd-daemon.h" |
693d371d | 31 | #include "sd-event.h" |
8314de1d | 32 | |
b5efdb8a | 33 | #include "alloc-util.h" |
194bbe33 | 34 | #include "cgroup-util.h" |
618234a5 | 35 | #include "cpu-set-util.h" |
5ba2dc25 | 36 | #include "dev-setup.h" |
7f2e3a14 | 37 | #include "device-monitor-private.h" |
abde5ea8 | 38 | #include "device-private.h" |
70068602 | 39 | #include "device-util.h" |
6d63048a | 40 | #include "event-util.h" |
3ffd4af2 | 41 | #include "fd-util.h" |
a5c32cff | 42 | #include "fileio.h" |
f97b34a6 | 43 | #include "format-util.h" |
f4f15635 | 44 | #include "fs-util.h" |
a505965d | 45 | #include "hashmap.h" |
c004493c | 46 | #include "io-util.h" |
70068602 | 47 | #include "libudev-device-internal.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" |
294bf0c3 | 53 | #include "pretty-print.h" |
4e731273 | 54 | #include "proc-cmdline.h" |
618234a5 LP |
55 | #include "process-util.h" |
56 | #include "selinux-util.h" | |
57 | #include "signal-util.h" | |
8f328d36 | 58 | #include "socket-util.h" |
07630cea | 59 | #include "string-util.h" |
49fe5c09 | 60 | #include "strv.h" |
5ea78a39 | 61 | #include "strxcpyx.h" |
46f0fbd8 | 62 | #include "syslog-util.h" |
07a26e42 | 63 | #include "udev-builtin.h" |
7d68eb1b | 64 | #include "udev-ctrl.h" |
618234a5 | 65 | #include "udev-util.h" |
70068602 | 66 | #include "udev-watch.h" |
618234a5 | 67 | #include "udev.h" |
ee104e11 | 68 | #include "user-util.h" |
7fafc032 | 69 | |
bba7a484 TG |
70 | static bool arg_debug = false; |
71 | static int arg_daemonize = false; | |
c4d44cba | 72 | static ResolveNameTiming arg_resolve_name_timing = RESOLVE_NAME_EARLY; |
216e8bbe | 73 | static unsigned arg_children_max = 0; |
6b92f429 | 74 | static usec_t arg_exec_delay_usec = 0; |
bba7a484 | 75 | static usec_t arg_event_timeout_usec = 180 * USEC_PER_SEC; |
c0c6806b TG |
76 | |
77 | typedef struct Manager { | |
693d371d | 78 | sd_event *event; |
c0c6806b | 79 | Hashmap *workers; |
40a57716 | 80 | LIST_HEAD(struct event, events); |
c26d1879 | 81 | const char *cgroup; |
cb49a4f2 | 82 | pid_t pid; /* the process that originally allocated the manager object */ |
c0c6806b | 83 | |
9a07157d | 84 | UdevRules *rules; |
9b5150b6 | 85 | Hashmap *properties; |
c0c6806b | 86 | |
0bed242c YW |
87 | sd_netlink *rtnl; |
88 | ||
7f2e3a14 | 89 | sd_device_monitor *monitor; |
c0c6806b TG |
90 | struct udev_ctrl *ctrl; |
91 | struct udev_ctrl_connection *ctrl_conn_blocking; | |
e237d8cb | 92 | int fd_inotify; |
e237d8cb TG |
93 | int worker_watch[2]; |
94 | ||
693d371d TG |
95 | sd_event_source *ctrl_event; |
96 | sd_event_source *uevent_event; | |
97 | sd_event_source *inotify_event; | |
eca195ec | 98 | sd_event_source *kill_workers_event; |
693d371d | 99 | |
7c4c7e89 TG |
100 | usec_t last_usec; |
101 | ||
c0c6806b | 102 | bool stop_exec_queue:1; |
c0c6806b TG |
103 | bool exit:1; |
104 | } Manager; | |
1e03b754 | 105 | |
1e03b754 | 106 | enum event_state { |
912541b0 KS |
107 | EVENT_UNDEF, |
108 | EVENT_QUEUED, | |
109 | EVENT_RUNNING, | |
1e03b754 KS |
110 | }; |
111 | ||
112 | struct event { | |
cb49a4f2 | 113 | Manager *manager; |
c6aa11f2 | 114 | struct worker *worker; |
912541b0 | 115 | enum event_state state; |
eb546b35 YW |
116 | |
117 | sd_device *dev; | |
118 | sd_device *dev_kernel; /* clone of originally received device */ | |
119 | ||
120 | uint64_t seqnum; | |
121 | uint64_t delaying_seqnum; | |
d8f462b4 YW |
122 | |
123 | sd_event_source *timeout_warning_event; | |
124 | sd_event_source *timeout_event; | |
eb546b35 YW |
125 | |
126 | LIST_FIELDS(struct event, event); | |
1e03b754 KS |
127 | }; |
128 | ||
ecb17862 | 129 | static void event_queue_cleanup(Manager *manager, enum event_state type); |
ff2c503d | 130 | |
1e03b754 | 131 | enum worker_state { |
912541b0 KS |
132 | WORKER_UNDEF, |
133 | WORKER_RUNNING, | |
134 | WORKER_IDLE, | |
135 | WORKER_KILLED, | |
1e03b754 KS |
136 | }; |
137 | ||
138 | struct worker { | |
c0c6806b | 139 | Manager *manager; |
912541b0 | 140 | pid_t pid; |
7f2e3a14 | 141 | sd_device_monitor *monitor; |
912541b0 KS |
142 | enum worker_state state; |
143 | struct event *event; | |
1e03b754 KS |
144 | }; |
145 | ||
146 | /* passed from worker to main process */ | |
147 | struct worker_message { | |
1e03b754 KS |
148 | }; |
149 | ||
c6aa11f2 TG |
150 | static void event_free(struct event *event) { |
151 | if (!event) | |
152 | return; | |
ba47b71c | 153 | |
40a57716 | 154 | assert(event->manager); |
c6aa11f2 | 155 | |
40a57716 | 156 | LIST_REMOVE(event, event->manager->events, event); |
eb546b35 YW |
157 | sd_device_unref(event->dev); |
158 | sd_device_unref(event->dev_kernel); | |
c6aa11f2 | 159 | |
d8f462b4 YW |
160 | sd_event_source_unref(event->timeout_warning_event); |
161 | sd_event_source_unref(event->timeout_event); | |
693d371d | 162 | |
c6aa11f2 TG |
163 | if (event->worker) |
164 | event->worker->event = NULL; | |
165 | ||
ba47b71c YW |
166 | /* only clean up the queue from the process that created it */ |
167 | if (LIST_IS_EMPTY(event->manager->events) && | |
168 | event->manager->pid == getpid_cached()) | |
169 | if (unlink("/run/udev/queue") < 0) | |
170 | log_warning_errno(errno, "Failed to unlink /run/udev/queue: %m"); | |
cb49a4f2 | 171 | |
912541b0 | 172 | free(event); |
aa8734ff | 173 | } |
7a770250 | 174 | |
c6aa11f2 TG |
175 | static void worker_free(struct worker *worker) { |
176 | if (!worker) | |
177 | return; | |
bc113de9 | 178 | |
c0c6806b TG |
179 | assert(worker->manager); |
180 | ||
4a0b58c4 | 181 | hashmap_remove(worker->manager->workers, PID_TO_PTR(worker->pid)); |
7f2e3a14 | 182 | sd_device_monitor_unref(worker->monitor); |
c6aa11f2 TG |
183 | event_free(worker->event); |
184 | ||
c6aa11f2 | 185 | free(worker); |
ff2c503d KS |
186 | } |
187 | ||
c0c6806b | 188 | static void manager_workers_free(Manager *manager) { |
a505965d TG |
189 | struct worker *worker; |
190 | Iterator i; | |
ff2c503d | 191 | |
c0c6806b TG |
192 | assert(manager); |
193 | ||
194 | HASHMAP_FOREACH(worker, manager->workers, i) | |
c6aa11f2 | 195 | worker_free(worker); |
a505965d | 196 | |
c0c6806b | 197 | manager->workers = hashmap_free(manager->workers); |
fc465079 KS |
198 | } |
199 | ||
7f2e3a14 | 200 | static int worker_new(struct worker **ret, Manager *manager, sd_device_monitor *worker_monitor, pid_t pid) { |
a505965d TG |
201 | _cleanup_free_ struct worker *worker = NULL; |
202 | int r; | |
3a19b32a TG |
203 | |
204 | assert(ret); | |
c0c6806b | 205 | assert(manager); |
3a19b32a TG |
206 | assert(worker_monitor); |
207 | assert(pid > 1); | |
208 | ||
209 | worker = new0(struct worker, 1); | |
210 | if (!worker) | |
211 | return -ENOMEM; | |
212 | ||
c0c6806b | 213 | worker->manager = manager; |
3a19b32a | 214 | /* close monitor, but keep address around */ |
7f2e3a14 YW |
215 | device_monitor_disconnect(worker_monitor); |
216 | worker->monitor = sd_device_monitor_ref(worker_monitor); | |
3a19b32a | 217 | worker->pid = pid; |
a505965d | 218 | |
c0c6806b | 219 | r = hashmap_ensure_allocated(&manager->workers, NULL); |
a505965d TG |
220 | if (r < 0) |
221 | return r; | |
222 | ||
4a0b58c4 | 223 | r = hashmap_put(manager->workers, PID_TO_PTR(pid), worker); |
a505965d TG |
224 | if (r < 0) |
225 | return r; | |
226 | ||
ae2a15bc | 227 | *ret = TAKE_PTR(worker); |
3a19b32a TG |
228 | |
229 | return 0; | |
230 | } | |
231 | ||
4fa4d885 TG |
232 | static int on_event_timeout(sd_event_source *s, uint64_t usec, void *userdata) { |
233 | struct event *event = userdata; | |
234 | ||
235 | assert(event); | |
236 | assert(event->worker); | |
237 | ||
238 | kill_and_sigcont(event->worker->pid, SIGKILL); | |
239 | event->worker->state = WORKER_KILLED; | |
240 | ||
eb546b35 | 241 | log_device_error(event->dev, "Worker ["PID_FMT"] processing SEQNUM=%"PRIu64" killed", event->worker->pid, event->seqnum); |
4fa4d885 TG |
242 | |
243 | return 1; | |
244 | } | |
245 | ||
246 | static int on_event_timeout_warning(sd_event_source *s, uint64_t usec, void *userdata) { | |
247 | struct event *event = userdata; | |
248 | ||
249 | assert(event); | |
044497e2 | 250 | assert(event->worker); |
4fa4d885 | 251 | |
eb546b35 | 252 | log_device_warning(event->dev, "Worker ["PID_FMT"] processing SEQNUM=%"PRIu64" is taking a long time", event->worker->pid, event->seqnum); |
4fa4d885 TG |
253 | |
254 | return 1; | |
255 | } | |
256 | ||
39c19cf1 | 257 | static void worker_attach_event(struct worker *worker, struct event *event) { |
693d371d TG |
258 | sd_event *e; |
259 | uint64_t usec; | |
693d371d | 260 | |
c6aa11f2 | 261 | assert(worker); |
693d371d | 262 | assert(worker->manager); |
c6aa11f2 TG |
263 | assert(event); |
264 | assert(!event->worker); | |
265 | assert(!worker->event); | |
266 | ||
39c19cf1 | 267 | worker->state = WORKER_RUNNING; |
39c19cf1 TG |
268 | worker->event = event; |
269 | event->state = EVENT_RUNNING; | |
c6aa11f2 | 270 | event->worker = worker; |
693d371d TG |
271 | |
272 | e = worker->manager->event; | |
273 | ||
3285baa8 | 274 | assert_se(sd_event_now(e, CLOCK_MONOTONIC, &usec) >= 0); |
693d371d | 275 | |
d8f462b4 | 276 | (void) sd_event_add_time(e, &event->timeout_warning_event, CLOCK_MONOTONIC, |
66f737b4 | 277 | usec + udev_warn_timeout(arg_event_timeout_usec), USEC_PER_SEC, on_event_timeout_warning, event); |
693d371d | 278 | |
d8f462b4 | 279 | (void) sd_event_add_time(e, &event->timeout_event, CLOCK_MONOTONIC, |
693d371d | 280 | usec + arg_event_timeout_usec, USEC_PER_SEC, on_event_timeout, event); |
39c19cf1 TG |
281 | } |
282 | ||
0bed242c YW |
283 | static void manager_clear_for_worker(Manager *manager) { |
284 | assert(manager); | |
285 | ||
286 | manager->ctrl_event = sd_event_source_unref(manager->ctrl_event); | |
287 | manager->uevent_event = sd_event_source_unref(manager->uevent_event); | |
288 | manager->inotify_event = sd_event_source_unref(manager->inotify_event); | |
289 | manager->kill_workers_event = sd_event_source_unref(manager->kill_workers_event); | |
290 | ||
291 | manager->event = sd_event_unref(manager->event); | |
292 | ||
293 | manager_workers_free(manager); | |
294 | event_queue_cleanup(manager, EVENT_UNDEF); | |
295 | ||
7f2e3a14 | 296 | manager->monitor = sd_device_monitor_unref(manager->monitor); |
0bed242c YW |
297 | manager->ctrl_conn_blocking = udev_ctrl_connection_unref(manager->ctrl_conn_blocking); |
298 | manager->ctrl = udev_ctrl_unref(manager->ctrl); | |
299 | ||
300 | manager->worker_watch[READ_END] = safe_close(manager->worker_watch[READ_END]); | |
301 | } | |
302 | ||
e237d8cb TG |
303 | static void manager_free(Manager *manager) { |
304 | if (!manager) | |
305 | return; | |
306 | ||
2024ed61 | 307 | udev_builtin_exit(); |
b2d21d93 | 308 | |
0bed242c | 309 | manager_clear_for_worker(manager); |
693d371d | 310 | |
0bed242c | 311 | sd_netlink_unref(manager->rtnl); |
e237d8cb | 312 | |
9b5150b6 | 313 | hashmap_free_free_free(manager->properties); |
981fae90 | 314 | udev_rules_free(manager->rules); |
e237d8cb | 315 | |
e237d8cb TG |
316 | safe_close(manager->fd_inotify); |
317 | safe_close_pair(manager->worker_watch); | |
318 | ||
319 | free(manager); | |
320 | } | |
321 | ||
322 | DEFINE_TRIVIAL_CLEANUP_FUNC(Manager*, manager_free); | |
323 | ||
9a73bd7c TG |
324 | static int worker_send_message(int fd) { |
325 | struct worker_message message = {}; | |
326 | ||
327 | return loop_write(fd, &message, sizeof(message), false); | |
328 | } | |
329 | ||
b97897e3 | 330 | static int worker_lock_block_device(sd_device *dev, int *ret_fd) { |
0bed242c | 331 | _cleanup_close_ int fd = -1; |
b97897e3 YW |
332 | const char *val; |
333 | int r; | |
fee854ee | 334 | |
0bed242c YW |
335 | assert(dev); |
336 | assert(ret_fd); | |
337 | ||
338 | /* | |
339 | * Take a shared lock on the device node; this establishes | |
340 | * a concept of device "ownership" to serialize device | |
341 | * access. External processes holding an exclusive lock will | |
342 | * cause udev to skip the event handling; in the case udev | |
343 | * acquired the lock, the external process can block until | |
344 | * udev has finished its event handling. | |
345 | */ | |
346 | ||
b97897e3 YW |
347 | r = sd_device_get_property_value(dev, "ACTION", &val); |
348 | if (r < 0) | |
349 | return log_device_debug_errno(dev, r, "Failed to get the value of property 'ACTION': %m"); | |
350 | ||
351 | if (streq(val, "remove")) | |
0bed242c YW |
352 | return 0; |
353 | ||
b97897e3 YW |
354 | r = sd_device_get_subsystem(dev, &val); |
355 | if (r < 0) | |
356 | return log_device_debug_errno(dev, r, "Failed to get subsystem: %m"); | |
357 | ||
358 | if (!streq(val, "block")) | |
0bed242c | 359 | return 0; |
fee854ee | 360 | |
b97897e3 YW |
361 | r = sd_device_get_sysname(dev, &val); |
362 | if (r < 0) | |
363 | return log_device_debug_errno(dev, r, "Failed to get sysname: %m"); | |
364 | ||
49fe5c09 | 365 | if (STARTSWITH_SET(val, "dm-", "md", "drbd")) |
0bed242c YW |
366 | return 0; |
367 | ||
b97897e3 YW |
368 | r = sd_device_get_devtype(dev, &val); |
369 | if (r < 0 && r != -ENOENT) | |
370 | return log_device_debug_errno(dev, r, "Failed to get devtype: %m"); | |
371 | if (r >= 0 && streq(val, "partition")) { | |
372 | r = sd_device_get_parent(dev, &dev); | |
373 | if (r < 0) | |
374 | return log_device_debug_errno(dev, r, "Failed to get parent device: %m"); | |
375 | } | |
0bed242c | 376 | |
b97897e3 YW |
377 | r = sd_device_get_devname(dev, &val); |
378 | if (r == -ENOENT) | |
0bed242c | 379 | return 0; |
b97897e3 YW |
380 | if (r < 0) |
381 | return log_device_debug_errno(dev, r, "Failed to get devname: %m"); | |
0bed242c | 382 | |
b97897e3 YW |
383 | fd = open(val, O_RDONLY|O_CLOEXEC|O_NOFOLLOW|O_NONBLOCK); |
384 | if (fd < 0) { | |
385 | log_device_debug_errno(dev, errno, "Failed to open '%s', ignoring: %m", val); | |
0bed242c | 386 | return 0; |
b97897e3 | 387 | } |
0bed242c YW |
388 | |
389 | if (flock(fd, LOCK_SH|LOCK_NB) < 0) | |
b97897e3 | 390 | return log_device_debug_errno(dev, errno, "Failed to flock(%s): %m", val); |
0bed242c YW |
391 | |
392 | *ret_fd = TAKE_FD(fd); | |
393 | return 1; | |
fee854ee RK |
394 | } |
395 | ||
abde5ea8 | 396 | static int worker_process_device(Manager *manager, sd_device *dev) { |
2e088715 | 397 | _cleanup_(udev_event_freep) UdevEvent *udev_event = NULL; |
0bed242c | 398 | _cleanup_close_ int fd_lock = -1; |
abde5ea8 | 399 | const char *seqnum; |
0bed242c | 400 | int r; |
912541b0 | 401 | |
0bed242c YW |
402 | assert(manager); |
403 | assert(dev); | |
404 | ||
abde5ea8 YW |
405 | r = sd_device_get_property_value(dev, "SEQNUM", &seqnum); |
406 | if (r < 0) | |
407 | log_device_debug_errno(dev, r, "Failed to get SEQNUM: %m"); | |
408 | ||
409 | log_device_debug(dev, "Processing device (SEQNUM=%s)", seqnum); | |
410 | ||
411 | udev_event = udev_event_new(dev, arg_exec_delay_usec, manager->rtnl); | |
0bed242c YW |
412 | if (!udev_event) |
413 | return -ENOMEM; | |
414 | ||
abde5ea8 | 415 | r = worker_lock_block_device(dev, &fd_lock); |
b6aab8ef | 416 | if (r < 0) |
0bed242c | 417 | return r; |
912541b0 | 418 | |
0bed242c YW |
419 | /* apply rules, create node, symlinks */ |
420 | udev_event_execute_rules(udev_event, arg_event_timeout_usec, manager->properties, manager->rules); | |
421 | udev_event_execute_run(udev_event, arg_event_timeout_usec); | |
2dd9f98d | 422 | |
0bed242c YW |
423 | if (!manager->rtnl) |
424 | /* in case rtnl was initialized */ | |
425 | manager->rtnl = sd_netlink_ref(udev_event->rtnl); | |
912541b0 | 426 | |
0bed242c YW |
427 | /* apply/restore inotify watch */ |
428 | if (udev_event->inotify_watch) { | |
abde5ea8 YW |
429 | (void) udev_watch_begin(dev); |
430 | r = device_update_db(dev); | |
431 | if (r < 0) | |
432 | return log_device_debug_errno(dev, r, "Failed to update database under /run/udev/data/: %m"); | |
0bed242c | 433 | } |
912541b0 | 434 | |
abde5ea8 | 435 | log_device_debug(dev, "Device (SEQNUM=%s) processed", seqnum); |
912541b0 | 436 | |
0bed242c YW |
437 | return 0; |
438 | } | |
912541b0 | 439 | |
e2130348 YW |
440 | static int worker_device_monitor_handler(sd_device_monitor *monitor, sd_device *dev, void *userdata) { |
441 | Manager *manager = userdata; | |
442 | int r; | |
443 | ||
444 | assert(dev); | |
445 | assert(manager); | |
446 | ||
447 | r = worker_process_device(manager, dev); | |
448 | if (r < 0) | |
449 | log_device_warning_errno(dev, r, "Failed to process device, ignoring: %m"); | |
450 | ||
451 | /* send processed event back to libudev listeners */ | |
452 | r = device_monitor_send_device(monitor, NULL, dev); | |
453 | if (r < 0) | |
454 | log_device_warning_errno(dev, r, "Failed to send device, ignoring: %m"); | |
455 | ||
456 | /* send udevd the result of the event execution */ | |
457 | r = worker_send_message(manager->worker_watch[WRITE_END]); | |
458 | if (r < 0) | |
459 | log_device_warning_errno(dev, r, "Failed to send signal to main daemon, ignoring: %m"); | |
460 | ||
461 | return 1; | |
462 | } | |
463 | ||
7f2e3a14 YW |
464 | static int worker_main(Manager *_manager, sd_device_monitor *monitor, sd_device *first_device) { |
465 | _cleanup_(sd_device_unrefp) sd_device *dev = first_device; | |
0bed242c | 466 | _cleanup_(manager_freep) Manager *manager = _manager; |
e2130348 | 467 | int r, ret; |
145dae7e | 468 | |
0bed242c YW |
469 | assert(manager); |
470 | assert(monitor); | |
471 | assert(dev); | |
912541b0 | 472 | |
0bed242c | 473 | unsetenv("NOTIFY_SOCKET"); |
3b64e4d4 | 474 | |
e2130348 YW |
475 | assert_se(sigprocmask_many(SIG_BLOCK, NULL, SIGTERM, -1) >= 0); |
476 | ||
477 | /* Reset OOM score, we only protect the main daemon. */ | |
478 | r = set_oom_score_adjust(0); | |
479 | if (r < 0) | |
480 | log_debug_errno(r, "Failed to reset OOM score, ignoring: %m"); | |
912541b0 | 481 | |
e2130348 YW |
482 | /* Clear unnecessary data in Manager object.*/ |
483 | manager_clear_for_worker(manager); | |
3ebdb81e | 484 | |
e2130348 YW |
485 | r = sd_event_new(&manager->event); |
486 | if (r < 0) | |
487 | return log_error_errno(r, "Failed to allocate event loop: %m"); | |
912541b0 | 488 | |
e2130348 YW |
489 | r = sd_event_add_signal(manager->event, NULL, SIGTERM, NULL, NULL); |
490 | if (r < 0) | |
491 | return log_error_errno(r, "Failed to set SIGTERM event: %m"); | |
4c83d994 | 492 | |
e2130348 YW |
493 | r = sd_device_monitor_attach_event(monitor, manager->event); |
494 | if (r < 0) | |
495 | return log_error_errno(r, "Failed to attach event loop to device monitor: %m"); | |
912541b0 | 496 | |
e2130348 | 497 | r = sd_device_monitor_start(monitor, worker_device_monitor_handler, manager); |
0bed242c | 498 | if (r < 0) |
e2130348 | 499 | return log_error_errno(r, "Failed to start device monitor: %m"); |
912541b0 | 500 | |
e2130348 | 501 | (void) sd_event_source_set_description(sd_device_monitor_get_event_source(monitor), "worker-device-monitor"); |
b66f29a1 | 502 | |
e2130348 YW |
503 | /* Process first device */ |
504 | (void) worker_device_monitor_handler(monitor, dev, manager); | |
912541b0 | 505 | |
e2130348 YW |
506 | r = sd_event_loop(manager->event); |
507 | if (r < 0) | |
508 | return log_error_errno(r, "Event loop failed: %m"); | |
509 | ||
510 | r = sd_event_get_exit_code(manager->event, &ret); | |
511 | if (r < 0) | |
512 | return log_error_errno(r, "Failed to get exit code: %m"); | |
513 | ||
514 | return ret; | |
0bed242c YW |
515 | } |
516 | ||
7443654e | 517 | static int worker_spawn(Manager *manager, struct event *event) { |
7f2e3a14 | 518 | _cleanup_(sd_device_monitor_unrefp) sd_device_monitor *worker_monitor = NULL; |
7443654e | 519 | struct worker *worker; |
0bed242c | 520 | pid_t pid; |
7443654e | 521 | int r; |
0bed242c YW |
522 | |
523 | /* listen for new events */ | |
7f2e3a14 YW |
524 | r = device_monitor_new_full(&worker_monitor, MONITOR_GROUP_NONE, -1); |
525 | if (r < 0) | |
526 | return r; | |
7443654e | 527 | |
0bed242c | 528 | /* allow the main daemon netlink address to send devices to the worker */ |
7f2e3a14 YW |
529 | r = device_monitor_allow_unicast_sender(worker_monitor, manager->monitor); |
530 | if (r < 0) | |
531 | return log_error_errno(r, "Worker: Failed to set unicast sender: %m"); | |
532 | ||
533 | r = device_monitor_enable_receiving(worker_monitor); | |
0bed242c | 534 | if (r < 0) |
7f2e3a14 | 535 | return log_error_errno(r, "Worker: Failed to enable receiving of device: %m"); |
0bed242c | 536 | |
49f3ee7e | 537 | r = safe_fork("(worker)", FORK_DEATHSIG, &pid); |
7443654e YW |
538 | if (r < 0) { |
539 | event->state = EVENT_QUEUED; | |
540 | return log_error_errno(r, "Failed to fork() worker: %m"); | |
541 | } | |
542 | if (r == 0) { | |
543 | /* Worker process */ | |
eb546b35 | 544 | r = worker_main(manager, worker_monitor, sd_device_ref(event->dev)); |
baa30fbc | 545 | log_close(); |
8b46c3fc | 546 | _exit(r < 0 ? EXIT_FAILURE : EXIT_SUCCESS); |
912541b0 | 547 | } |
e03c7cc2 | 548 | |
7443654e YW |
549 | r = worker_new(&worker, manager, worker_monitor, pid); |
550 | if (r < 0) | |
551 | return log_error_errno(r, "Failed to create worker object: %m"); | |
e03c7cc2 | 552 | |
7443654e | 553 | worker_attach_event(worker, event); |
39c19cf1 | 554 | |
eb546b35 | 555 | log_device_debug(event->dev, "Worker ["PID_FMT"] is forked for processing SEQNUM=%"PRIu64".", pid, event->seqnum); |
7443654e | 556 | return 0; |
7fafc032 KS |
557 | } |
558 | ||
c0c6806b | 559 | static void event_run(Manager *manager, struct event *event) { |
a505965d TG |
560 | struct worker *worker; |
561 | Iterator i; | |
7f2e3a14 | 562 | int r; |
912541b0 | 563 | |
c0c6806b TG |
564 | assert(manager); |
565 | assert(event); | |
566 | ||
567 | HASHMAP_FOREACH(worker, manager->workers, i) { | |
912541b0 KS |
568 | if (worker->state != WORKER_IDLE) |
569 | continue; | |
570 | ||
eb546b35 | 571 | r = device_monitor_send_device(manager->monitor, worker->monitor, event->dev); |
7f2e3a14 | 572 | if (r < 0) { |
eb546b35 | 573 | log_device_error_errno(event->dev, r, "Worker ["PID_FMT"] did not accept message, killing the worker: %m", |
7f2e3a14 | 574 | worker->pid); |
cb542e84 | 575 | (void) kill(worker->pid, SIGKILL); |
912541b0 KS |
576 | worker->state = WORKER_KILLED; |
577 | continue; | |
578 | } | |
39c19cf1 | 579 | worker_attach_event(worker, event); |
912541b0 KS |
580 | return; |
581 | } | |
582 | ||
c0c6806b | 583 | if (hashmap_size(manager->workers) >= arg_children_max) { |
bba7a484 | 584 | if (arg_children_max > 1) |
044497e2 | 585 | log_debug("Maximum number (%u) of children reached.", hashmap_size(manager->workers)); |
912541b0 KS |
586 | return; |
587 | } | |
588 | ||
589 | /* start new worker and pass initial device */ | |
c0c6806b | 590 | worker_spawn(manager, event); |
1e03b754 KS |
591 | } |
592 | ||
eb546b35 YW |
593 | static int event_queue_insert(Manager *manager, sd_device *dev) { |
594 | _cleanup_(sd_device_unrefp) sd_device *clone = NULL; | |
912541b0 | 595 | struct event *event; |
eb546b35 YW |
596 | const char *val; |
597 | uint64_t seqnum; | |
cb49a4f2 | 598 | int r; |
912541b0 | 599 | |
ecb17862 TG |
600 | assert(manager); |
601 | assert(dev); | |
602 | ||
040e6896 TG |
603 | /* only one process can add events to the queue */ |
604 | if (manager->pid == 0) | |
df0ff127 | 605 | manager->pid = getpid_cached(); |
040e6896 | 606 | |
df0ff127 | 607 | assert(manager->pid == getpid_cached()); |
cb49a4f2 | 608 | |
eb546b35 YW |
609 | /* We only accepts devices received by device monitor. */ |
610 | r = sd_device_get_property_value(dev, "SEQNUM", &val); | |
611 | if (r < 0) | |
612 | return r; | |
613 | ||
614 | r = safe_atou64(val, &seqnum); | |
615 | if (r < 0) | |
616 | return r; | |
617 | ||
618 | if (seqnum == 0) | |
619 | return -EINVAL; | |
912541b0 | 620 | |
eb546b35 YW |
621 | /* Save original device to restore the state on failures. */ |
622 | r = device_shallow_clone(dev, &clone); | |
623 | if (r < 0) | |
624 | return r; | |
625 | ||
626 | r = device_copy_properties(clone, dev); | |
627 | if (r < 0) | |
628 | return r; | |
912541b0 | 629 | |
eb546b35 YW |
630 | event = new(struct event, 1); |
631 | if (!event) | |
632 | return -ENOMEM; | |
912541b0 | 633 | |
eb546b35 YW |
634 | *event = (struct event) { |
635 | .manager = manager, | |
636 | .dev = sd_device_ref(dev), | |
637 | .dev_kernel = TAKE_PTR(clone), | |
638 | .seqnum = seqnum, | |
639 | .state = EVENT_QUEUED, | |
640 | }; | |
cb49a4f2 | 641 | |
40a57716 | 642 | if (LIST_IS_EMPTY(manager->events)) { |
cb49a4f2 TG |
643 | r = touch("/run/udev/queue"); |
644 | if (r < 0) | |
044497e2 | 645 | log_warning_errno(r, "Failed to touch /run/udev/queue: %m"); |
cb49a4f2 TG |
646 | } |
647 | ||
40a57716 | 648 | LIST_APPEND(event, manager->events, event); |
cb49a4f2 | 649 | |
eb546b35 YW |
650 | if (DEBUG_LOGGING) { |
651 | if (sd_device_get_property_value(dev, "ACTION", &val) < 0) | |
652 | val = NULL; | |
653 | ||
654 | log_device_debug(dev, "Device (SEQNUM=%"PRIu64", ACTION=%s) is queued", seqnum, strnull(val)); | |
655 | } | |
656 | ||
912541b0 | 657 | return 0; |
fc465079 KS |
658 | } |
659 | ||
c0c6806b | 660 | static void manager_kill_workers(Manager *manager) { |
a505965d TG |
661 | struct worker *worker; |
662 | Iterator i; | |
1e03b754 | 663 | |
c0c6806b TG |
664 | assert(manager); |
665 | ||
666 | HASHMAP_FOREACH(worker, manager->workers, i) { | |
912541b0 KS |
667 | if (worker->state == WORKER_KILLED) |
668 | continue; | |
1e03b754 | 669 | |
912541b0 | 670 | worker->state = WORKER_KILLED; |
cb542e84 | 671 | (void) kill(worker->pid, SIGTERM); |
912541b0 | 672 | } |
1e03b754 KS |
673 | } |
674 | ||
e3196993 | 675 | /* lookup event for identical, parent, child device */ |
eb546b35 YW |
676 | static int is_device_busy(Manager *manager, struct event *event) { |
677 | const char *subsystem, *devpath, *devpath_old = NULL; | |
678 | dev_t devnum = makedev(0, 0); | |
40a57716 | 679 | struct event *loop_event; |
eb546b35 YW |
680 | size_t devpath_len; |
681 | int r, ifindex = 0; | |
682 | bool is_block; | |
683 | ||
684 | r = sd_device_get_subsystem(event->dev, &subsystem); | |
685 | if (r < 0) | |
686 | return r; | |
687 | ||
688 | is_block = streq(subsystem, "block"); | |
689 | ||
690 | r = sd_device_get_devpath(event->dev, &devpath); | |
691 | if (r < 0) | |
692 | return r; | |
693 | ||
694 | devpath_len = strlen(devpath); | |
695 | ||
696 | r = sd_device_get_property_value(event->dev, "DEVPATH_OLD", &devpath_old); | |
697 | if (r < 0 && r != -ENOENT) | |
698 | return r; | |
699 | ||
700 | r = sd_device_get_devnum(event->dev, &devnum); | |
701 | if (r < 0 && r != -ENOENT) | |
702 | return r; | |
703 | ||
704 | r = sd_device_get_ifindex(event->dev, &ifindex); | |
705 | if (r < 0 && r != -ENOENT) | |
706 | return r; | |
912541b0 KS |
707 | |
708 | /* check if queue contains events we depend on */ | |
40a57716 | 709 | LIST_FOREACH(event, loop_event, manager->events) { |
eb546b35 YW |
710 | size_t loop_devpath_len, common; |
711 | const char *loop_devpath; | |
712 | ||
87ac8d99 | 713 | /* we already found a later event, earlier cannot block us, no need to check again */ |
912541b0 KS |
714 | if (loop_event->seqnum < event->delaying_seqnum) |
715 | continue; | |
716 | ||
717 | /* event we checked earlier still exists, no need to check again */ | |
718 | if (loop_event->seqnum == event->delaying_seqnum) | |
719 | return true; | |
720 | ||
721 | /* found ourself, no later event can block us */ | |
722 | if (loop_event->seqnum >= event->seqnum) | |
723 | break; | |
724 | ||
725 | /* check major/minor */ | |
eb546b35 YW |
726 | if (major(devnum) != 0) { |
727 | const char *s; | |
728 | dev_t d; | |
729 | ||
730 | if (sd_device_get_subsystem(loop_event->dev, &s) < 0) | |
731 | continue; | |
732 | ||
733 | if (sd_device_get_devnum(loop_event->dev, &d) >= 0 && | |
734 | devnum == d && is_block == streq(s, "block")) | |
735 | return true; | |
736 | } | |
912541b0 KS |
737 | |
738 | /* check network device ifindex */ | |
eb546b35 YW |
739 | if (ifindex > 0) { |
740 | int i; | |
741 | ||
742 | if (sd_device_get_ifindex(loop_event->dev, &i) >= 0 && | |
743 | ifindex == i) | |
744 | return true; | |
745 | } | |
746 | ||
747 | if (sd_device_get_devpath(loop_event->dev, &loop_devpath) < 0) | |
748 | continue; | |
912541b0 KS |
749 | |
750 | /* check our old name */ | |
eb546b35 | 751 | if (devpath_old && streq(devpath_old, loop_devpath)) { |
912541b0 KS |
752 | event->delaying_seqnum = loop_event->seqnum; |
753 | return true; | |
754 | } | |
755 | ||
eb546b35 YW |
756 | loop_devpath_len = strlen(loop_devpath); |
757 | ||
912541b0 | 758 | /* compare devpath */ |
eb546b35 | 759 | common = MIN(devpath_len, loop_devpath_len); |
912541b0 KS |
760 | |
761 | /* one devpath is contained in the other? */ | |
eb546b35 | 762 | if (!strneq(devpath, loop_devpath, common)) |
912541b0 KS |
763 | continue; |
764 | ||
765 | /* identical device event found */ | |
eb546b35 | 766 | if (devpath_len == loop_devpath_len) { |
912541b0 | 767 | /* devices names might have changed/swapped in the meantime */ |
eb546b35 | 768 | if (major(devnum) != 0 || ifindex > 0) |
912541b0 KS |
769 | continue; |
770 | event->delaying_seqnum = loop_event->seqnum; | |
771 | return true; | |
772 | } | |
773 | ||
774 | /* parent device event found */ | |
eb546b35 | 775 | if (devpath[common] == '/') { |
912541b0 KS |
776 | event->delaying_seqnum = loop_event->seqnum; |
777 | return true; | |
778 | } | |
779 | ||
780 | /* child device event found */ | |
eb546b35 | 781 | if (loop_devpath[common] == '/') { |
912541b0 KS |
782 | event->delaying_seqnum = loop_event->seqnum; |
783 | return true; | |
784 | } | |
912541b0 KS |
785 | } |
786 | ||
787 | return false; | |
7fafc032 KS |
788 | } |
789 | ||
693d371d TG |
790 | static int on_exit_timeout(sd_event_source *s, uint64_t usec, void *userdata) { |
791 | Manager *manager = userdata; | |
792 | ||
793 | assert(manager); | |
794 | ||
d4e98880 | 795 | log_error("Giving up waiting for workers to finish."); |
693d371d TG |
796 | sd_event_exit(manager->event, -ETIMEDOUT); |
797 | ||
798 | return 1; | |
799 | } | |
800 | ||
62d43dac | 801 | static void manager_exit(Manager *manager) { |
693d371d TG |
802 | uint64_t usec; |
803 | int r; | |
62d43dac TG |
804 | |
805 | assert(manager); | |
806 | ||
807 | manager->exit = true; | |
808 | ||
b79aacbf TG |
809 | sd_notify(false, |
810 | "STOPPING=1\n" | |
811 | "STATUS=Starting shutdown..."); | |
812 | ||
62d43dac | 813 | /* close sources of new events and discard buffered events */ |
693d371d | 814 | manager->ctrl_event = sd_event_source_unref(manager->ctrl_event); |
ab7854df | 815 | manager->ctrl = udev_ctrl_unref(manager->ctrl); |
62d43dac | 816 | |
693d371d | 817 | manager->inotify_event = sd_event_source_unref(manager->inotify_event); |
ab7854df | 818 | manager->fd_inotify = safe_close(manager->fd_inotify); |
62d43dac | 819 | |
693d371d | 820 | manager->uevent_event = sd_event_source_unref(manager->uevent_event); |
7f2e3a14 | 821 | manager->monitor = sd_device_monitor_unref(manager->monitor); |
62d43dac TG |
822 | |
823 | /* discard queued events and kill workers */ | |
824 | event_queue_cleanup(manager, EVENT_QUEUED); | |
825 | manager_kill_workers(manager); | |
693d371d | 826 | |
3285baa8 | 827 | assert_se(sd_event_now(manager->event, CLOCK_MONOTONIC, &usec) >= 0); |
693d371d | 828 | |
3285baa8 | 829 | r = sd_event_add_time(manager->event, NULL, CLOCK_MONOTONIC, |
693d371d TG |
830 | usec + 30 * USEC_PER_SEC, USEC_PER_SEC, on_exit_timeout, manager); |
831 | if (r < 0) | |
832 | return; | |
62d43dac TG |
833 | } |
834 | ||
835 | /* reload requested, HUP signal received, rules changed, builtin changed */ | |
836 | static void manager_reload(Manager *manager) { | |
837 | ||
838 | assert(manager); | |
839 | ||
b79aacbf TG |
840 | sd_notify(false, |
841 | "RELOADING=1\n" | |
842 | "STATUS=Flushing configuration..."); | |
843 | ||
62d43dac | 844 | manager_kill_workers(manager); |
981fae90 | 845 | manager->rules = udev_rules_free(manager->rules); |
2024ed61 | 846 | udev_builtin_exit(); |
b79aacbf | 847 | |
1ef72b55 MS |
848 | sd_notifyf(false, |
849 | "READY=1\n" | |
850 | "STATUS=Processing with %u children at max", arg_children_max); | |
62d43dac TG |
851 | } |
852 | ||
eca195ec YW |
853 | static int on_kill_workers_event(sd_event_source *s, uint64_t usec, void *userdata) { |
854 | Manager *manager = userdata; | |
855 | ||
856 | assert(manager); | |
857 | ||
858 | log_debug("Cleanup idle workers"); | |
859 | manager_kill_workers(manager); | |
860 | ||
861 | return 1; | |
862 | } | |
863 | ||
c0c6806b | 864 | static void event_queue_start(Manager *manager) { |
40a57716 | 865 | struct event *event; |
693d371d | 866 | usec_t usec; |
0725c4b9 | 867 | int r; |
8ab44e3f | 868 | |
c0c6806b TG |
869 | assert(manager); |
870 | ||
40a57716 | 871 | if (LIST_IS_EMPTY(manager->events) || |
7c4c7e89 TG |
872 | manager->exit || manager->stop_exec_queue) |
873 | return; | |
874 | ||
3285baa8 | 875 | assert_se(sd_event_now(manager->event, CLOCK_MONOTONIC, &usec) >= 0); |
38a03f06 LP |
876 | /* check for changed config, every 3 seconds at most */ |
877 | if (manager->last_usec == 0 || | |
878 | (usec - manager->last_usec) > 3 * USEC_PER_SEC) { | |
879 | if (udev_rules_check_timestamp(manager->rules) || | |
2024ed61 | 880 | udev_builtin_validate()) |
38a03f06 | 881 | manager_reload(manager); |
693d371d | 882 | |
38a03f06 | 883 | manager->last_usec = usec; |
7c4c7e89 TG |
884 | } |
885 | ||
0725c4b9 YW |
886 | r = event_source_disable(manager->kill_workers_event); |
887 | if (r < 0) | |
888 | log_warning_errno(r, "Failed to disable event source for cleaning up idle workers, ignoring: %m"); | |
eca195ec | 889 | |
2024ed61 | 890 | udev_builtin_init(); |
7c4c7e89 TG |
891 | |
892 | if (!manager->rules) { | |
1d791281 ZJS |
893 | r = udev_rules_new(&manager->rules, arg_resolve_name_timing); |
894 | if (r < 0) { | |
895 | log_warning_errno(r, "Failed to read udev rules: %m"); | |
7c4c7e89 | 896 | return; |
1d791281 | 897 | } |
7c4c7e89 TG |
898 | } |
899 | ||
eb546b35 | 900 | LIST_FOREACH(event, event, manager->events) { |
912541b0 KS |
901 | if (event->state != EVENT_QUEUED) |
902 | continue; | |
0bc74ea7 | 903 | |
912541b0 | 904 | /* do not start event if parent or child event is still running */ |
eb546b35 | 905 | if (is_device_busy(manager, event) != 0) |
912541b0 | 906 | continue; |
fc465079 | 907 | |
c0c6806b | 908 | event_run(manager, event); |
912541b0 | 909 | } |
1e03b754 KS |
910 | } |
911 | ||
ecb17862 | 912 | static void event_queue_cleanup(Manager *manager, enum event_state match_type) { |
40a57716 | 913 | struct event *event, *tmp; |
ff2c503d | 914 | |
40a57716 | 915 | LIST_FOREACH_SAFE(event, event, tmp, manager->events) { |
912541b0 KS |
916 | if (match_type != EVENT_UNDEF && match_type != event->state) |
917 | continue; | |
ff2c503d | 918 | |
c6aa11f2 | 919 | event_free(event); |
912541b0 | 920 | } |
ff2c503d KS |
921 | } |
922 | ||
e82e8fa5 | 923 | static int on_worker(sd_event_source *s, int fd, uint32_t revents, void *userdata) { |
c0c6806b TG |
924 | Manager *manager = userdata; |
925 | ||
926 | assert(manager); | |
927 | ||
912541b0 KS |
928 | for (;;) { |
929 | struct worker_message msg; | |
979558f3 TG |
930 | struct iovec iovec = { |
931 | .iov_base = &msg, | |
932 | .iov_len = sizeof(msg), | |
933 | }; | |
934 | union { | |
935 | struct cmsghdr cmsghdr; | |
936 | uint8_t buf[CMSG_SPACE(sizeof(struct ucred))]; | |
937 | } control = {}; | |
938 | struct msghdr msghdr = { | |
939 | .msg_iov = &iovec, | |
940 | .msg_iovlen = 1, | |
941 | .msg_control = &control, | |
942 | .msg_controllen = sizeof(control), | |
943 | }; | |
944 | struct cmsghdr *cmsg; | |
912541b0 | 945 | ssize_t size; |
979558f3 | 946 | struct ucred *ucred = NULL; |
a505965d | 947 | struct worker *worker; |
912541b0 | 948 | |
e82e8fa5 | 949 | size = recvmsg(fd, &msghdr, MSG_DONTWAIT); |
979558f3 | 950 | if (size < 0) { |
738a7907 TG |
951 | if (errno == EINTR) |
952 | continue; | |
953 | else if (errno == EAGAIN) | |
954 | /* nothing more to read */ | |
955 | break; | |
979558f3 | 956 | |
044497e2 | 957 | return log_error_errno(errno, "Failed to receive message: %m"); |
979558f3 | 958 | } else if (size != sizeof(struct worker_message)) { |
d4e98880 | 959 | log_warning("Ignoring worker message with invalid size %zi bytes", size); |
e82e8fa5 | 960 | continue; |
979558f3 TG |
961 | } |
962 | ||
2a1288ff | 963 | CMSG_FOREACH(cmsg, &msghdr) { |
979558f3 TG |
964 | if (cmsg->cmsg_level == SOL_SOCKET && |
965 | cmsg->cmsg_type == SCM_CREDENTIALS && | |
966 | cmsg->cmsg_len == CMSG_LEN(sizeof(struct ucred))) | |
967 | ucred = (struct ucred*) CMSG_DATA(cmsg); | |
968 | } | |
969 | ||
970 | if (!ucred || ucred->pid <= 0) { | |
d4e98880 | 971 | log_warning("Ignoring worker message without valid PID"); |
979558f3 TG |
972 | continue; |
973 | } | |
912541b0 KS |
974 | |
975 | /* lookup worker who sent the signal */ | |
4a0b58c4 | 976 | worker = hashmap_get(manager->workers, PID_TO_PTR(ucred->pid)); |
a505965d | 977 | if (!worker) { |
044497e2 | 978 | log_debug("Worker ["PID_FMT"] returned, but is no longer tracked", ucred->pid); |
a505965d | 979 | continue; |
912541b0 | 980 | } |
c0bbfd72 | 981 | |
a505965d TG |
982 | if (worker->state != WORKER_KILLED) |
983 | worker->state = WORKER_IDLE; | |
984 | ||
985 | /* worker returned */ | |
986 | event_free(worker->event); | |
912541b0 | 987 | } |
e82e8fa5 | 988 | |
8302fe5a TG |
989 | /* we have free workers, try to schedule events */ |
990 | event_queue_start(manager); | |
991 | ||
e82e8fa5 TG |
992 | return 1; |
993 | } | |
994 | ||
f00d2b6d | 995 | static int on_uevent(sd_device_monitor *monitor, sd_device *dev, void *userdata) { |
c0c6806b | 996 | Manager *manager = userdata; |
e82e8fa5 TG |
997 | int r; |
998 | ||
c0c6806b | 999 | assert(manager); |
e82e8fa5 | 1000 | |
7f2e3a14 YW |
1001 | device_ensure_usec_initialized(dev, NULL); |
1002 | ||
eb546b35 YW |
1003 | r = event_queue_insert(manager, dev); |
1004 | if (r < 0) { | |
1005 | log_device_error_errno(dev, r, "Failed to insert device into event queue: %m"); | |
7f2e3a14 | 1006 | return 1; |
eb546b35 | 1007 | } |
7f2e3a14 YW |
1008 | |
1009 | /* we have fresh events, try to schedule them */ | |
1010 | event_queue_start(manager); | |
e82e8fa5 TG |
1011 | |
1012 | return 1; | |
88f4b648 KS |
1013 | } |
1014 | ||
3b47c739 | 1015 | /* receive the udevd message from userspace */ |
e82e8fa5 | 1016 | static int on_ctrl_msg(sd_event_source *s, int fd, uint32_t revents, void *userdata) { |
c0c6806b | 1017 | Manager *manager = userdata; |
8e766630 LP |
1018 | _cleanup_(udev_ctrl_connection_unrefp) struct udev_ctrl_connection *ctrl_conn = NULL; |
1019 | _cleanup_(udev_ctrl_msg_unrefp) struct udev_ctrl_msg *ctrl_msg = NULL; | |
912541b0 | 1020 | const char *str; |
9b5150b6 | 1021 | int i, r; |
912541b0 | 1022 | |
c0c6806b | 1023 | assert(manager); |
e4f66b77 | 1024 | |
c0c6806b | 1025 | ctrl_conn = udev_ctrl_get_connection(manager->ctrl); |
e4f66b77 | 1026 | if (!ctrl_conn) |
e82e8fa5 | 1027 | return 1; |
912541b0 KS |
1028 | |
1029 | ctrl_msg = udev_ctrl_receive_msg(ctrl_conn); | |
e4f66b77 | 1030 | if (!ctrl_msg) |
e82e8fa5 | 1031 | return 1; |
912541b0 KS |
1032 | |
1033 | i = udev_ctrl_get_set_log_level(ctrl_msg); | |
1034 | if (i >= 0) { | |
044497e2 | 1035 | log_debug("Received udev control message (SET_LOG_LEVEL), setting log_priority=%i", i); |
baa30fbc | 1036 | log_set_max_level(i); |
c0c6806b | 1037 | manager_kill_workers(manager); |
912541b0 KS |
1038 | } |
1039 | ||
1040 | if (udev_ctrl_get_stop_exec_queue(ctrl_msg) > 0) { | |
044497e2 | 1041 | log_debug("Received udev control message (STOP_EXEC_QUEUE)"); |
c0c6806b | 1042 | manager->stop_exec_queue = true; |
912541b0 KS |
1043 | } |
1044 | ||
1045 | if (udev_ctrl_get_start_exec_queue(ctrl_msg) > 0) { | |
044497e2 | 1046 | log_debug("Received udev control message (START_EXEC_QUEUE)"); |
c0c6806b | 1047 | manager->stop_exec_queue = false; |
8302fe5a | 1048 | event_queue_start(manager); |
912541b0 KS |
1049 | } |
1050 | ||
1051 | if (udev_ctrl_get_reload(ctrl_msg) > 0) { | |
044497e2 | 1052 | log_debug("Received udev control message (RELOAD)"); |
62d43dac | 1053 | manager_reload(manager); |
912541b0 KS |
1054 | } |
1055 | ||
1056 | str = udev_ctrl_get_set_env(ctrl_msg); | |
9b5150b6 YW |
1057 | if (str) { |
1058 | _cleanup_free_ char *key = NULL, *val = NULL, *old_key = NULL, *old_val = NULL; | |
1059 | char *eq; | |
1060 | ||
1061 | eq = strchr(str, '='); | |
1062 | if (!eq) { | |
1063 | log_error("Invalid key format '%s'", str); | |
1064 | return 1; | |
1065 | } | |
1066 | ||
1067 | key = strndup(str, eq - str); | |
1068 | if (!key) { | |
1069 | log_oom(); | |
1070 | return 1; | |
1071 | } | |
1072 | ||
1073 | old_val = hashmap_remove2(manager->properties, key, (void **) &old_key); | |
1074 | ||
1075 | r = hashmap_ensure_allocated(&manager->properties, &string_hash_ops); | |
1076 | if (r < 0) { | |
1077 | log_oom(); | |
1078 | return 1; | |
912541b0 | 1079 | } |
9b5150b6 YW |
1080 | |
1081 | eq++; | |
1082 | if (!isempty(eq)) { | |
044497e2 | 1083 | log_debug("Received udev control message (ENV), unsetting '%s'", key); |
9b5150b6 YW |
1084 | |
1085 | r = hashmap_put(manager->properties, key, NULL); | |
1086 | if (r < 0) { | |
1087 | log_oom(); | |
1088 | return 1; | |
1089 | } | |
1090 | } else { | |
1091 | val = strdup(eq); | |
1092 | if (!val) { | |
1093 | log_oom(); | |
1094 | return 1; | |
1095 | } | |
1096 | ||
044497e2 | 1097 | log_debug("Received udev control message (ENV), setting '%s=%s'", key, val); |
9b5150b6 YW |
1098 | |
1099 | r = hashmap_put(manager->properties, key, val); | |
1100 | if (r < 0) { | |
1101 | log_oom(); | |
1102 | return 1; | |
1103 | } | |
1104 | } | |
1105 | ||
1106 | key = val = NULL; | |
c0c6806b | 1107 | manager_kill_workers(manager); |
912541b0 KS |
1108 | } |
1109 | ||
1110 | i = udev_ctrl_get_set_children_max(ctrl_msg); | |
1111 | if (i >= 0) { | |
044497e2 | 1112 | log_debug("Receivd udev control message (SET_MAX_CHILDREN), setting children_max=%i", i); |
bba7a484 | 1113 | arg_children_max = i; |
1ef72b55 MS |
1114 | |
1115 | (void) sd_notifyf(false, | |
1116 | "READY=1\n" | |
1117 | "STATUS=Processing with %u children at max", arg_children_max); | |
912541b0 KS |
1118 | } |
1119 | ||
cb49a4f2 | 1120 | if (udev_ctrl_get_ping(ctrl_msg) > 0) |
044497e2 | 1121 | log_debug("Received udev control message (SYNC)"); |
912541b0 KS |
1122 | |
1123 | if (udev_ctrl_get_exit(ctrl_msg) > 0) { | |
044497e2 | 1124 | log_debug("Received udev control message (EXIT)"); |
62d43dac | 1125 | manager_exit(manager); |
c0c6806b TG |
1126 | /* keep reference to block the client until we exit |
1127 | TODO: deal with several blocking exit requests */ | |
1128 | manager->ctrl_conn_blocking = udev_ctrl_connection_ref(ctrl_conn); | |
912541b0 | 1129 | } |
e4f66b77 | 1130 | |
e82e8fa5 | 1131 | return 1; |
88f4b648 | 1132 | } |
4a231017 | 1133 | |
70068602 YW |
1134 | static int synthesize_change(sd_device *dev) { |
1135 | const char *subsystem, *sysname, *devname, *syspath, *devtype; | |
1136 | char filename[PATH_MAX]; | |
f3a740a5 | 1137 | int r; |
edd32000 | 1138 | |
70068602 YW |
1139 | r = sd_device_get_subsystem(dev, &subsystem); |
1140 | if (r < 0) | |
1141 | return r; | |
1142 | ||
1143 | r = sd_device_get_sysname(dev, &sysname); | |
1144 | if (r < 0) | |
1145 | return r; | |
1146 | ||
1147 | r = sd_device_get_devname(dev, &devname); | |
1148 | if (r < 0) | |
1149 | return r; | |
1150 | ||
1151 | r = sd_device_get_syspath(dev, &syspath); | |
1152 | if (r < 0) | |
1153 | return r; | |
1154 | ||
1155 | r = sd_device_get_devtype(dev, &devtype); | |
1156 | if (r < 0) | |
1157 | return r; | |
1158 | ||
1159 | if (streq_ptr("block", subsystem) && | |
1160 | streq_ptr("disk", devtype) && | |
1161 | !startswith(sysname, "dm-")) { | |
1162 | _cleanup_(sd_device_enumerator_unrefp) sd_device_enumerator *e = NULL; | |
1163 | bool part_table_read = false, has_partitions = false; | |
1164 | sd_device *d; | |
ede34445 | 1165 | int fd; |
f3a740a5 | 1166 | |
ede34445 | 1167 | /* |
e9fc29f4 KS |
1168 | * Try to re-read the partition table. This only succeeds if |
1169 | * none of the devices is busy. The kernel returns 0 if no | |
1170 | * partition table is found, and we will not get an event for | |
1171 | * the disk. | |
ede34445 | 1172 | */ |
70068602 | 1173 | fd = open(devname, O_RDONLY|O_CLOEXEC|O_NOFOLLOW|O_NONBLOCK); |
ede34445 | 1174 | if (fd >= 0) { |
02ba8fb3 KS |
1175 | r = flock(fd, LOCK_EX|LOCK_NB); |
1176 | if (r >= 0) | |
1177 | r = ioctl(fd, BLKRRPART, 0); | |
1178 | ||
ede34445 KS |
1179 | close(fd); |
1180 | if (r >= 0) | |
e9fc29f4 | 1181 | part_table_read = true; |
ede34445 KS |
1182 | } |
1183 | ||
e9fc29f4 | 1184 | /* search for partitions */ |
70068602 | 1185 | r = sd_device_enumerator_new(&e); |
f3a740a5 KS |
1186 | if (r < 0) |
1187 | return r; | |
1188 | ||
70068602 | 1189 | r = sd_device_enumerator_allow_uninitialized(e); |
f3a740a5 KS |
1190 | if (r < 0) |
1191 | return r; | |
1192 | ||
70068602 | 1193 | r = sd_device_enumerator_add_match_parent(e, dev); |
47a3fa0f TA |
1194 | if (r < 0) |
1195 | return r; | |
e9fc29f4 | 1196 | |
70068602 YW |
1197 | r = sd_device_enumerator_add_match_subsystem(e, "block", true); |
1198 | if (r < 0) | |
1199 | return r; | |
e9fc29f4 | 1200 | |
70068602 YW |
1201 | FOREACH_DEVICE(e, d) { |
1202 | const char *t; | |
e9fc29f4 | 1203 | |
70068602 YW |
1204 | if (sd_device_get_devtype(d, &t) < 0 || |
1205 | !streq("partition", t)) | |
e9fc29f4 KS |
1206 | continue; |
1207 | ||
1208 | has_partitions = true; | |
1209 | break; | |
1210 | } | |
1211 | ||
1212 | /* | |
1213 | * We have partitions and re-read the table, the kernel already sent | |
1214 | * out a "change" event for the disk, and "remove/add" for all | |
1215 | * partitions. | |
1216 | */ | |
1217 | if (part_table_read && has_partitions) | |
1218 | return 0; | |
1219 | ||
1220 | /* | |
1221 | * We have partitions but re-reading the partition table did not | |
1222 | * work, synthesize "change" for the disk and all partitions. | |
1223 | */ | |
70068602 YW |
1224 | log_debug("Device '%s' is closed, synthesising 'change'", devname); |
1225 | strscpyl(filename, sizeof(filename), syspath, "/uevent", NULL); | |
57512c89 | 1226 | write_string_file(filename, "change", WRITE_STRING_FILE_DISABLE_BUFFER); |
e9fc29f4 | 1227 | |
70068602 YW |
1228 | FOREACH_DEVICE(e, d) { |
1229 | const char *t, *n, *s; | |
f3a740a5 | 1230 | |
70068602 YW |
1231 | if (sd_device_get_devtype(d, &t) < 0 || |
1232 | !streq("partition", t)) | |
f3a740a5 KS |
1233 | continue; |
1234 | ||
70068602 YW |
1235 | if (sd_device_get_devname(d, &n) < 0 || |
1236 | sd_device_get_syspath(d, &s) < 0) | |
f3a740a5 KS |
1237 | continue; |
1238 | ||
70068602 YW |
1239 | log_debug("Device '%s' is closed, synthesising partition '%s' 'change'", devname, n); |
1240 | strscpyl(filename, sizeof(filename), s, "/uevent", NULL); | |
57512c89 | 1241 | write_string_file(filename, "change", WRITE_STRING_FILE_DISABLE_BUFFER); |
f3a740a5 | 1242 | } |
ede34445 KS |
1243 | |
1244 | return 0; | |
f3a740a5 KS |
1245 | } |
1246 | ||
70068602 YW |
1247 | log_debug("Device %s is closed, synthesising 'change'", devname); |
1248 | strscpyl(filename, sizeof(filename), syspath, "/uevent", NULL); | |
57512c89 | 1249 | write_string_file(filename, "change", WRITE_STRING_FILE_DISABLE_BUFFER); |
ede34445 | 1250 | |
f3a740a5 | 1251 | return 0; |
edd32000 KS |
1252 | } |
1253 | ||
e82e8fa5 | 1254 | static int on_inotify(sd_event_source *s, int fd, uint32_t revents, void *userdata) { |
c0c6806b | 1255 | Manager *manager = userdata; |
0254e944 | 1256 | union inotify_event_buffer buffer; |
f7c1ad4f LP |
1257 | struct inotify_event *e; |
1258 | ssize_t l; | |
0725c4b9 | 1259 | int r; |
912541b0 | 1260 | |
c0c6806b | 1261 | assert(manager); |
e82e8fa5 | 1262 | |
0725c4b9 YW |
1263 | r = event_source_disable(manager->kill_workers_event); |
1264 | if (r < 0) | |
1265 | log_warning_errno(r, "Failed to disable event source for cleaning up idle workers, ignoring: %m"); | |
eca195ec | 1266 | |
e82e8fa5 | 1267 | l = read(fd, &buffer, sizeof(buffer)); |
f7c1ad4f | 1268 | if (l < 0) { |
3742095b | 1269 | if (IN_SET(errno, EAGAIN, EINTR)) |
e82e8fa5 | 1270 | return 1; |
912541b0 | 1271 | |
f7c1ad4f | 1272 | return log_error_errno(errno, "Failed to read inotify fd: %m"); |
912541b0 KS |
1273 | } |
1274 | ||
f7c1ad4f | 1275 | FOREACH_INOTIFY_EVENT(e, buffer, l) { |
70068602 YW |
1276 | _cleanup_(sd_device_unrefp) sd_device *dev = NULL; |
1277 | const char *devnode; | |
1278 | ||
7fe3324c | 1279 | if (udev_watch_lookup(e->wd, &dev) <= 0) |
70068602 | 1280 | continue; |
912541b0 | 1281 | |
70068602 | 1282 | if (sd_device_get_devname(dev, &devnode) < 0) |
edd32000 | 1283 | continue; |
912541b0 | 1284 | |
7fe3324c | 1285 | log_device_debug(dev, "Inotify event: %x for %s", e->mask, devnode); |
da143134 | 1286 | if (e->mask & IN_CLOSE_WRITE) |
edd32000 | 1287 | synthesize_change(dev); |
da143134 | 1288 | else if (e->mask & IN_IGNORED) |
2024ed61 | 1289 | udev_watch_end(dev); |
912541b0 KS |
1290 | } |
1291 | ||
e82e8fa5 | 1292 | return 1; |
bd284db1 SJR |
1293 | } |
1294 | ||
0561329d | 1295 | static int on_sigterm(sd_event_source *s, const struct signalfd_siginfo *si, void *userdata) { |
c0c6806b TG |
1296 | Manager *manager = userdata; |
1297 | ||
1298 | assert(manager); | |
1299 | ||
62d43dac | 1300 | manager_exit(manager); |
912541b0 | 1301 | |
e82e8fa5 TG |
1302 | return 1; |
1303 | } | |
912541b0 | 1304 | |
0561329d | 1305 | static int on_sighup(sd_event_source *s, const struct signalfd_siginfo *si, void *userdata) { |
c0c6806b TG |
1306 | Manager *manager = userdata; |
1307 | ||
1308 | assert(manager); | |
1309 | ||
62d43dac | 1310 | manager_reload(manager); |
912541b0 | 1311 | |
e82e8fa5 TG |
1312 | return 1; |
1313 | } | |
912541b0 | 1314 | |
e82e8fa5 | 1315 | static int on_sigchld(sd_event_source *s, const struct signalfd_siginfo *si, void *userdata) { |
c0c6806b | 1316 | Manager *manager = userdata; |
0725c4b9 | 1317 | int r; |
c0c6806b TG |
1318 | |
1319 | assert(manager); | |
1320 | ||
e82e8fa5 TG |
1321 | for (;;) { |
1322 | pid_t pid; | |
1323 | int status; | |
1324 | struct worker *worker; | |
d1317d02 | 1325 | |
e82e8fa5 TG |
1326 | pid = waitpid(-1, &status, WNOHANG); |
1327 | if (pid <= 0) | |
f29328d6 | 1328 | break; |
e82e8fa5 | 1329 | |
4a0b58c4 | 1330 | worker = hashmap_get(manager->workers, PID_TO_PTR(pid)); |
e82e8fa5 | 1331 | if (!worker) { |
dc7faf2a | 1332 | log_warning("Worker ["PID_FMT"] is unknown, ignoring", pid); |
f29328d6 | 1333 | continue; |
912541b0 | 1334 | } |
e82e8fa5 TG |
1335 | |
1336 | if (WIFEXITED(status)) { | |
1337 | if (WEXITSTATUS(status) == 0) | |
dc7faf2a | 1338 | log_debug("Worker ["PID_FMT"] exited", pid); |
e82e8fa5 | 1339 | else |
dc7faf2a | 1340 | log_warning("Worker ["PID_FMT"] exited with return code %i", pid, WEXITSTATUS(status)); |
e82e8fa5 | 1341 | } else if (WIFSIGNALED(status)) { |
dc7faf2a | 1342 | log_warning("Worker ["PID_FMT"] terminated by signal %i (%s)", pid, WTERMSIG(status), signal_to_string(WTERMSIG(status))); |
e82e8fa5 | 1343 | } else if (WIFSTOPPED(status)) { |
dc7faf2a | 1344 | log_info("Worker ["PID_FMT"] stopped", pid); |
f29328d6 | 1345 | continue; |
e82e8fa5 | 1346 | } else if (WIFCONTINUED(status)) { |
dc7faf2a | 1347 | log_info("Worker ["PID_FMT"] continued", pid); |
f29328d6 | 1348 | continue; |
e82e8fa5 | 1349 | } else |
dc7faf2a | 1350 | log_warning("Worker ["PID_FMT"] exit with status 0x%04x", pid, status); |
e82e8fa5 | 1351 | |
05e6d9c6 | 1352 | if ((!WIFEXITED(status) || WEXITSTATUS(status) != 0) && worker->event) { |
eb546b35 | 1353 | log_device_error(worker->event->dev, "Worker ["PID_FMT"] failed", pid); |
dc7faf2a | 1354 | |
05e6d9c6 | 1355 | /* delete state from disk */ |
eb546b35 YW |
1356 | device_delete_db(worker->event->dev); |
1357 | device_tag_index(worker->event->dev, NULL, false); | |
dc7faf2a | 1358 | |
05e6d9c6 | 1359 | /* forward kernel event without amending it */ |
eb546b35 | 1360 | r = device_monitor_send_device(manager->monitor, NULL, worker->event->dev_kernel); |
dc7faf2a | 1361 | if (r < 0) |
eb546b35 | 1362 | log_device_error_errno(worker->event->dev_kernel, r, "Failed to send back device to kernel: %m"); |
e82e8fa5 TG |
1363 | } |
1364 | ||
1365 | worker_free(worker); | |
912541b0 | 1366 | } |
e82e8fa5 | 1367 | |
8302fe5a TG |
1368 | /* we can start new workers, try to schedule events */ |
1369 | event_queue_start(manager); | |
1370 | ||
eca195ec | 1371 | /* Disable unnecessary cleanup event */ |
0725c4b9 YW |
1372 | if (hashmap_isempty(manager->workers)) { |
1373 | r = event_source_disable(manager->kill_workers_event); | |
1374 | if (r < 0) | |
1375 | log_warning_errno(r, "Failed to disable event source for cleaning up idle workers, ignoring: %m"); | |
1376 | } | |
eca195ec | 1377 | |
e82e8fa5 | 1378 | return 1; |
f27125f9 | 1379 | } |
1380 | ||
693d371d TG |
1381 | static int on_post(sd_event_source *s, void *userdata) { |
1382 | Manager *manager = userdata; | |
693d371d TG |
1383 | |
1384 | assert(manager); | |
1385 | ||
b6107f01 YW |
1386 | if (!LIST_IS_EMPTY(manager->events)) |
1387 | return 1; | |
1388 | ||
1389 | /* There are no pending events. Let's cleanup idle process. */ | |
1390 | ||
1391 | if (!hashmap_isempty(manager->workers)) { | |
1392 | /* There are idle workers */ | |
6d63048a YW |
1393 | (void) event_reset_time(manager->event, &manager->kill_workers_event, CLOCK_MONOTONIC, |
1394 | now(CLOCK_MONOTONIC) + 3 * USEC_PER_SEC, USEC_PER_SEC, | |
1395 | on_kill_workers_event, manager, 0, "kill-workers-event", false); | |
b6107f01 | 1396 | return 1; |
693d371d TG |
1397 | } |
1398 | ||
b6107f01 YW |
1399 | /* There are no idle workers. */ |
1400 | ||
1401 | if (manager->exit) | |
1402 | return sd_event_exit(manager->event, 0); | |
1403 | ||
1404 | if (manager->cgroup) | |
1405 | /* cleanup possible left-over processes in our cgroup */ | |
1406 | (void) cg_kill(SYSTEMD_CGROUP_CONTROLLER, manager->cgroup, SIGKILL, CGROUP_IGNORE_SELF, NULL, NULL, NULL); | |
1407 | ||
693d371d TG |
1408 | return 1; |
1409 | } | |
1410 | ||
c4b69e99 | 1411 | static int listen_fds(int *ret_ctrl, int *ret_netlink) { |
fcff1e72 | 1412 | int ctrl_fd = -1, netlink_fd = -1; |
c4b69e99 | 1413 | int fd, n; |
912541b0 | 1414 | |
c4b69e99 YW |
1415 | assert(ret_ctrl); |
1416 | assert(ret_netlink); | |
fcff1e72 | 1417 | |
912541b0 | 1418 | n = sd_listen_fds(true); |
fcff1e72 TG |
1419 | if (n < 0) |
1420 | return n; | |
912541b0 KS |
1421 | |
1422 | for (fd = SD_LISTEN_FDS_START; fd < n + SD_LISTEN_FDS_START; fd++) { | |
c52cff07 | 1423 | if (sd_is_socket(fd, AF_LOCAL, SOCK_SEQPACKET, -1) > 0) { |
fcff1e72 TG |
1424 | if (ctrl_fd >= 0) |
1425 | return -EINVAL; | |
1426 | ctrl_fd = fd; | |
912541b0 KS |
1427 | continue; |
1428 | } | |
1429 | ||
c52cff07 | 1430 | if (sd_is_socket(fd, AF_NETLINK, SOCK_RAW, -1) > 0) { |
fcff1e72 TG |
1431 | if (netlink_fd >= 0) |
1432 | return -EINVAL; | |
1433 | netlink_fd = fd; | |
912541b0 KS |
1434 | continue; |
1435 | } | |
1436 | ||
fcff1e72 | 1437 | return -EINVAL; |
912541b0 KS |
1438 | } |
1439 | ||
c4b69e99 YW |
1440 | *ret_ctrl = ctrl_fd; |
1441 | *ret_netlink = netlink_fd; | |
912541b0 | 1442 | |
912541b0 | 1443 | return 0; |
7459bcdc KS |
1444 | } |
1445 | ||
e6f86cac | 1446 | /* |
3f85ef0f | 1447 | * read the kernel command line, in case we need to get into debug mode |
1d84ad94 LP |
1448 | * udev.log_priority=<level> syslog priority |
1449 | * udev.children_max=<number of workers> events are fully serialized if set to 1 | |
1450 | * udev.exec_delay=<number of seconds> delay execution of every executed program | |
1451 | * udev.event_timeout=<number of seconds> seconds to wait before terminating an event | |
e6f86cac | 1452 | */ |
96287a49 | 1453 | static int parse_proc_cmdline_item(const char *key, const char *value, void *data) { |
92e72467 | 1454 | int r = 0; |
e6f86cac | 1455 | |
614a823c | 1456 | assert(key); |
e6f86cac | 1457 | |
614a823c TG |
1458 | if (!value) |
1459 | return 0; | |
e6f86cac | 1460 | |
1d84ad94 LP |
1461 | if (proc_cmdline_key_streq(key, "udev.log_priority")) { |
1462 | ||
1463 | if (proc_cmdline_value_missing(key, value)) | |
1464 | return 0; | |
1465 | ||
46f0fbd8 | 1466 | r = log_level_from_string(value); |
92e72467 ZJS |
1467 | if (r >= 0) |
1468 | log_set_max_level(r); | |
1d84ad94 LP |
1469 | |
1470 | } else if (proc_cmdline_key_streq(key, "udev.event_timeout")) { | |
1471 | ||
1472 | if (proc_cmdline_value_missing(key, value)) | |
1473 | return 0; | |
1474 | ||
9d9264ba | 1475 | r = parse_sec(value, &arg_event_timeout_usec); |
1d84ad94 LP |
1476 | |
1477 | } else if (proc_cmdline_key_streq(key, "udev.children_max")) { | |
1478 | ||
1479 | if (proc_cmdline_value_missing(key, value)) | |
1480 | return 0; | |
1481 | ||
020328e1 | 1482 | r = safe_atou(value, &arg_children_max); |
1d84ad94 LP |
1483 | |
1484 | } else if (proc_cmdline_key_streq(key, "udev.exec_delay")) { | |
1485 | ||
1486 | if (proc_cmdline_value_missing(key, value)) | |
1487 | return 0; | |
1488 | ||
6b92f429 | 1489 | r = parse_sec(value, &arg_exec_delay_usec); |
1d84ad94 LP |
1490 | |
1491 | } else if (startswith(key, "udev.")) | |
044497e2 | 1492 | log_warning("Unknown udev kernel command line option \"%s\", ignoring", key); |
614a823c | 1493 | |
92e72467 ZJS |
1494 | if (r < 0) |
1495 | log_warning_errno(r, "Failed to parse \"%s=%s\", ignoring: %m", key, value); | |
1d84ad94 | 1496 | |
614a823c | 1497 | return 0; |
e6f86cac KS |
1498 | } |
1499 | ||
37ec0fdd LP |
1500 | static int help(void) { |
1501 | _cleanup_free_ char *link = NULL; | |
1502 | int r; | |
1503 | ||
1504 | r = terminal_urlify_man("systemd-udevd.service", "8", &link); | |
1505 | if (r < 0) | |
1506 | return log_oom(); | |
1507 | ||
ed216e1f TG |
1508 | printf("%s [OPTIONS...]\n\n" |
1509 | "Manages devices.\n\n" | |
5ac0162c | 1510 | " -h --help Print this message\n" |
2d19c17e MF |
1511 | " -V --version Print version of the program\n" |
1512 | " -d --daemon Detach and run in the background\n" | |
1513 | " -D --debug Enable debug output\n" | |
1514 | " -c --children-max=INT Set maximum number of workers\n" | |
1515 | " -e --exec-delay=SECONDS Seconds to wait before executing RUN=\n" | |
1516 | " -t --event-timeout=SECONDS Seconds to wait before terminating an event\n" | |
1517 | " -N --resolve-names=early|late|never\n" | |
5ac0162c | 1518 | " When to resolve users and groups\n" |
37ec0fdd LP |
1519 | "\nSee the %s for details.\n" |
1520 | , program_invocation_short_name | |
1521 | , link | |
1522 | ); | |
1523 | ||
1524 | return 0; | |
ed216e1f TG |
1525 | } |
1526 | ||
bba7a484 | 1527 | static int parse_argv(int argc, char *argv[]) { |
912541b0 | 1528 | static const struct option options[] = { |
bba7a484 TG |
1529 | { "daemon", no_argument, NULL, 'd' }, |
1530 | { "debug", no_argument, NULL, 'D' }, | |
1531 | { "children-max", required_argument, NULL, 'c' }, | |
1532 | { "exec-delay", required_argument, NULL, 'e' }, | |
1533 | { "event-timeout", required_argument, NULL, 't' }, | |
1534 | { "resolve-names", required_argument, NULL, 'N' }, | |
1535 | { "help", no_argument, NULL, 'h' }, | |
1536 | { "version", no_argument, NULL, 'V' }, | |
912541b0 KS |
1537 | {} |
1538 | }; | |
689a97f5 | 1539 | |
044497e2 | 1540 | int c, r; |
689a97f5 | 1541 | |
bba7a484 TG |
1542 | assert(argc >= 0); |
1543 | assert(argv); | |
912541b0 | 1544 | |
e14b6f21 | 1545 | while ((c = getopt_long(argc, argv, "c:de:Dt:N:hV", options, NULL)) >= 0) { |
bba7a484 | 1546 | switch (c) { |
912541b0 | 1547 | |
912541b0 | 1548 | case 'd': |
bba7a484 | 1549 | arg_daemonize = true; |
912541b0 KS |
1550 | break; |
1551 | case 'c': | |
020328e1 | 1552 | r = safe_atou(optarg, &arg_children_max); |
6f5cf8a8 | 1553 | if (r < 0) |
389f9bf2 | 1554 | log_warning_errno(r, "Failed to parse --children-max= value '%s', ignoring: %m", optarg); |
912541b0 KS |
1555 | break; |
1556 | case 'e': | |
6b92f429 | 1557 | r = parse_sec(optarg, &arg_exec_delay_usec); |
6f5cf8a8 | 1558 | if (r < 0) |
6b92f429 | 1559 | log_warning_errno(r, "Failed to parse --exec-delay= value '%s', ignoring: %m", optarg); |
912541b0 | 1560 | break; |
9719859c | 1561 | case 't': |
9d9264ba | 1562 | r = parse_sec(optarg, &arg_event_timeout_usec); |
f1e8664e | 1563 | if (r < 0) |
9d9264ba | 1564 | log_warning_errno(r, "Failed to parse --event-timeout= value '%s', ignoring: %m", optarg); |
9719859c | 1565 | break; |
912541b0 | 1566 | case 'D': |
bba7a484 | 1567 | arg_debug = true; |
912541b0 | 1568 | break; |
c4d44cba YW |
1569 | case 'N': { |
1570 | ResolveNameTiming t; | |
1571 | ||
1572 | t = resolve_name_timing_from_string(optarg); | |
1573 | if (t < 0) | |
1574 | log_warning("Invalid --resolve-names= value '%s', ignoring.", optarg); | |
1575 | else | |
1576 | arg_resolve_name_timing = t; | |
912541b0 | 1577 | break; |
c4d44cba | 1578 | } |
912541b0 | 1579 | case 'h': |
37ec0fdd | 1580 | return help(); |
912541b0 | 1581 | case 'V': |
948aaa7c | 1582 | printf("%s\n", PACKAGE_VERSION); |
bba7a484 TG |
1583 | return 0; |
1584 | case '?': | |
1585 | return -EINVAL; | |
912541b0 | 1586 | default: |
bba7a484 TG |
1587 | assert_not_reached("Unhandled option"); |
1588 | ||
912541b0 KS |
1589 | } |
1590 | } | |
1591 | ||
bba7a484 TG |
1592 | return 1; |
1593 | } | |
1594 | ||
b7f74dd4 | 1595 | static int manager_new(Manager **ret, int fd_ctrl, int fd_uevent, const char *cgroup) { |
c0c6806b | 1596 | _cleanup_(manager_freep) Manager *manager = NULL; |
6d5e65f6 | 1597 | int r, fd_worker; |
c0c6806b TG |
1598 | |
1599 | assert(ret); | |
1600 | ||
6f19b42f | 1601 | manager = new(Manager, 1); |
c0c6806b TG |
1602 | if (!manager) |
1603 | return log_oom(); | |
1604 | ||
6f19b42f YW |
1605 | *manager = (Manager) { |
1606 | .fd_inotify = -1, | |
1607 | .worker_watch = { -1, -1 }, | |
1608 | .cgroup = cgroup, | |
1609 | }; | |
e237d8cb | 1610 | |
2024ed61 | 1611 | udev_builtin_init(); |
b2d21d93 | 1612 | |
1d791281 | 1613 | r = udev_rules_new(&manager->rules, arg_resolve_name_timing); |
ecb17862 | 1614 | if (!manager->rules) |
1d791281 | 1615 | return log_error_errno(r, "Failed to read udev rules: %m"); |
ecb17862 | 1616 | |
2024ed61 | 1617 | manager->ctrl = udev_ctrl_new_from_fd(fd_ctrl); |
f59118ec | 1618 | if (!manager->ctrl) |
886cf317 | 1619 | return log_error_errno(SYNTHETIC_ERRNO(EINVAL), "Failed to initialize udev control socket"); |
e237d8cb | 1620 | |
6acf1ccb YW |
1621 | if (fd_ctrl < 0) { |
1622 | r = udev_ctrl_enable_receiving(manager->ctrl); | |
1623 | if (r < 0) | |
1624 | return log_error_errno(r, "Failed to bind udev control socket: %m"); | |
1625 | } | |
c4b69e99 YW |
1626 | |
1627 | fd_ctrl = udev_ctrl_get_fd(manager->ctrl); | |
1628 | if (fd_ctrl < 0) | |
044497e2 | 1629 | return log_error_errno(fd_ctrl, "Failed to get udev control socket fd: %m"); |
c4b69e99 | 1630 | |
7f2e3a14 YW |
1631 | r = device_monitor_new_full(&manager->monitor, MONITOR_GROUP_KERNEL, fd_uevent); |
1632 | if (r < 0) | |
1633 | return log_error_errno(r, "Failed to initialize device monitor: %m"); | |
e237d8cb | 1634 | |
986ab0d2 YW |
1635 | if (fd_uevent < 0) |
1636 | (void) sd_device_monitor_set_receive_buffer_size(manager->monitor, 128 * 1024 * 1024); | |
c4b69e99 | 1637 | |
e237d8cb TG |
1638 | /* unnamed socket from workers to the main daemon */ |
1639 | r = socketpair(AF_LOCAL, SOCK_DGRAM|SOCK_CLOEXEC, 0, manager->worker_watch); | |
1640 | if (r < 0) | |
044497e2 | 1641 | return log_error_errno(errno, "Failed to create socketpair for communicating with workers: %m"); |
e237d8cb | 1642 | |
693d371d | 1643 | fd_worker = manager->worker_watch[READ_END]; |
e237d8cb | 1644 | |
2ff48e98 | 1645 | r = setsockopt_int(fd_worker, SOL_SOCKET, SO_PASSCRED, true); |
e237d8cb | 1646 | if (r < 0) |
044497e2 | 1647 | return log_error_errno(r, "Failed to enable SO_PASSCRED: %m"); |
e237d8cb | 1648 | |
b7759e04 YW |
1649 | r = udev_watch_init(); |
1650 | if (r < 0) | |
1651 | return log_error_errno(r, "Failed to create inotify descriptor: %m"); | |
1652 | manager->fd_inotify = r; | |
e237d8cb | 1653 | |
2024ed61 | 1654 | udev_watch_restore(); |
e237d8cb TG |
1655 | |
1656 | /* block and listen to all signals on signalfd */ | |
72c0a2c2 | 1657 | assert_se(sigprocmask_many(SIG_BLOCK, NULL, SIGTERM, SIGINT, SIGHUP, SIGCHLD, -1) >= 0); |
693d371d | 1658 | |
49f997f3 TG |
1659 | r = sd_event_default(&manager->event); |
1660 | if (r < 0) | |
044497e2 | 1661 | return log_error_errno(r, "Failed to allocate event loop: %m"); |
49f997f3 | 1662 | |
693d371d TG |
1663 | r = sd_event_add_signal(manager->event, NULL, SIGINT, on_sigterm, manager); |
1664 | if (r < 0) | |
044497e2 | 1665 | return log_error_errno(r, "Failed to create SIGINT event source: %m"); |
693d371d TG |
1666 | |
1667 | r = sd_event_add_signal(manager->event, NULL, SIGTERM, on_sigterm, manager); | |
1668 | if (r < 0) | |
044497e2 | 1669 | return log_error_errno(r, "Failed to create SIGTERM event source: %m"); |
693d371d TG |
1670 | |
1671 | r = sd_event_add_signal(manager->event, NULL, SIGHUP, on_sighup, manager); | |
1672 | if (r < 0) | |
044497e2 | 1673 | return log_error_errno(r, "Failed to create SIGHUP event source: %m"); |
693d371d TG |
1674 | |
1675 | r = sd_event_add_signal(manager->event, NULL, SIGCHLD, on_sigchld, manager); | |
1676 | if (r < 0) | |
044497e2 | 1677 | return log_error_errno(r, "Failed to create SIGCHLD event source: %m"); |
693d371d TG |
1678 | |
1679 | r = sd_event_set_watchdog(manager->event, true); | |
1680 | if (r < 0) | |
044497e2 | 1681 | return log_error_errno(r, "Failed to create watchdog event source: %m"); |
693d371d | 1682 | |
11b1dd8c | 1683 | r = sd_event_add_io(manager->event, &manager->ctrl_event, fd_ctrl, EPOLLIN, on_ctrl_msg, manager); |
693d371d | 1684 | if (r < 0) |
044497e2 | 1685 | return log_error_errno(r, "Failed to create udev control event source: %m"); |
693d371d TG |
1686 | |
1687 | /* This needs to be after the inotify and uevent handling, to make sure | |
1688 | * that the ping is send back after fully processing the pending uevents | |
1689 | * (including the synthetic ones we may create due to inotify events). | |
1690 | */ | |
1691 | r = sd_event_source_set_priority(manager->ctrl_event, SD_EVENT_PRIORITY_IDLE); | |
1692 | if (r < 0) | |
044497e2 | 1693 | return log_error_errno(r, "Failed to set IDLE event priority for udev control event source: %m"); |
693d371d TG |
1694 | |
1695 | r = sd_event_add_io(manager->event, &manager->inotify_event, manager->fd_inotify, EPOLLIN, on_inotify, manager); | |
1696 | if (r < 0) | |
044497e2 | 1697 | return log_error_errno(r, "Failed to create inotify event source: %m"); |
693d371d | 1698 | |
f00d2b6d YW |
1699 | r = sd_device_monitor_attach_event(manager->monitor, manager->event); |
1700 | if (r < 0) | |
1701 | return log_error_errno(r, "Failed to attach event to device monitor: %m"); | |
1702 | ||
1703 | r = sd_device_monitor_start(manager->monitor, on_uevent, manager); | |
693d371d | 1704 | if (r < 0) |
f00d2b6d YW |
1705 | return log_error_errno(r, "Failed to start device monitor: %m"); |
1706 | ||
1707 | (void) sd_event_source_set_description(sd_device_monitor_get_event_source(manager->monitor), "device-monitor"); | |
693d371d TG |
1708 | |
1709 | r = sd_event_add_io(manager->event, NULL, fd_worker, EPOLLIN, on_worker, manager); | |
1710 | if (r < 0) | |
044497e2 | 1711 | return log_error_errno(r, "Failed to create worker event source: %m"); |
693d371d TG |
1712 | |
1713 | r = sd_event_add_post(manager->event, NULL, on_post, manager); | |
1714 | if (r < 0) | |
044497e2 | 1715 | return log_error_errno(r, "Failed to create post event source: %m"); |
e237d8cb | 1716 | |
1cc6c93a | 1717 | *ret = TAKE_PTR(manager); |
11b1dd8c | 1718 | |
86c3bece | 1719 | return 0; |
c0c6806b TG |
1720 | } |
1721 | ||
0c5a109a | 1722 | static int main_loop(int fd_ctrl, int fd_uevent, const char *cgroup) { |
c0c6806b | 1723 | _cleanup_(manager_freep) Manager *manager = NULL; |
077fc5e2 DH |
1724 | int r; |
1725 | ||
1726 | r = manager_new(&manager, fd_ctrl, fd_uevent, cgroup); | |
1727 | if (r < 0) { | |
044497e2 | 1728 | r = log_error_errno(r, "Failed to allocate manager object: %m"); |
077fc5e2 DH |
1729 | goto exit; |
1730 | } | |
1731 | ||
1732 | r = udev_rules_apply_static_dev_perms(manager->rules); | |
1733 | if (r < 0) | |
044497e2 | 1734 | log_error_errno(r, "Failed to apply permissions on static device nodes: %m"); |
077fc5e2 | 1735 | |
1ef72b55 MS |
1736 | (void) sd_notifyf(false, |
1737 | "READY=1\n" | |
1738 | "STATUS=Processing with %u children at max", arg_children_max); | |
077fc5e2 DH |
1739 | |
1740 | r = sd_event_loop(manager->event); | |
1741 | if (r < 0) { | |
044497e2 | 1742 | log_error_errno(r, "Event loop failed: %m"); |
077fc5e2 DH |
1743 | goto exit; |
1744 | } | |
1745 | ||
1746 | sd_event_get_exit_code(manager->event, &r); | |
1747 | ||
1748 | exit: | |
1749 | sd_notify(false, | |
1750 | "STOPPING=1\n" | |
1751 | "STATUS=Shutting down..."); | |
1752 | if (manager) | |
1753 | udev_ctrl_cleanup(manager->ctrl); | |
1754 | return r; | |
1755 | } | |
1756 | ||
0c5a109a | 1757 | static int run(int argc, char *argv[]) { |
c26d1879 | 1758 | _cleanup_free_ char *cgroup = NULL; |
efa1606e | 1759 | int fd_ctrl = -1, fd_uevent = -1; |
e5d7bce1 | 1760 | int r; |
bba7a484 | 1761 | |
bba7a484 | 1762 | log_set_target(LOG_TARGET_AUTO); |
a14e7af1 | 1763 | udev_parse_config_full(&arg_children_max, &arg_exec_delay_usec, &arg_event_timeout_usec, &arg_resolve_name_timing); |
bba7a484 TG |
1764 | log_parse_environment(); |
1765 | log_open(); | |
1766 | ||
bba7a484 TG |
1767 | r = parse_argv(argc, argv); |
1768 | if (r <= 0) | |
0c5a109a | 1769 | return r; |
bba7a484 | 1770 | |
1d84ad94 | 1771 | r = proc_cmdline_parse(parse_proc_cmdline_item, NULL, PROC_CMDLINE_STRIP_RD_PREFIX); |
614a823c | 1772 | if (r < 0) |
044497e2 | 1773 | log_warning_errno(r, "Failed to parse kernel command line, ignoring: %m"); |
912541b0 | 1774 | |
78d3e041 KS |
1775 | if (arg_debug) { |
1776 | log_set_target(LOG_TARGET_CONSOLE); | |
bba7a484 | 1777 | log_set_max_level(LOG_DEBUG); |
78d3e041 | 1778 | } |
bba7a484 | 1779 | |
6174a243 YW |
1780 | log_set_max_level_realm(LOG_REALM_SYSTEMD, log_get_max_level()); |
1781 | ||
fba868fa LP |
1782 | r = must_be_root(); |
1783 | if (r < 0) | |
0c5a109a | 1784 | return r; |
912541b0 | 1785 | |
712cebf1 TG |
1786 | if (arg_children_max == 0) { |
1787 | cpu_set_t cpu_set; | |
e438c57a | 1788 | unsigned long mem_limit; |
ebc164ef | 1789 | |
712cebf1 | 1790 | arg_children_max = 8; |
d457ff83 | 1791 | |
ece174c5 | 1792 | if (sched_getaffinity(0, sizeof(cpu_set), &cpu_set) == 0) |
faae64fa | 1793 | arg_children_max += CPU_COUNT(&cpu_set) * 8; |
912541b0 | 1794 | |
e438c57a MW |
1795 | mem_limit = physical_memory() / (128LU*1024*1024); |
1796 | arg_children_max = MAX(10U, MIN(arg_children_max, mem_limit)); | |
1797 | ||
044497e2 | 1798 | log_debug("Set children_max to %u", arg_children_max); |
d457ff83 | 1799 | } |
912541b0 | 1800 | |
712cebf1 TG |
1801 | /* set umask before creating any file/directory */ |
1802 | r = chdir("/"); | |
0c5a109a ZJS |
1803 | if (r < 0) |
1804 | return log_error_errno(errno, "Failed to change dir to '/': %m"); | |
194bbe33 | 1805 | |
712cebf1 | 1806 | umask(022); |
912541b0 | 1807 | |
c3dacc8b | 1808 | r = mac_selinux_init(); |
0c5a109a ZJS |
1809 | if (r < 0) |
1810 | return log_error_errno(r, "Could not initialize labelling: %m"); | |
912541b0 | 1811 | |
dae8b82e | 1812 | r = mkdir_errno_wrapper("/run/udev", 0755); |
0c5a109a ZJS |
1813 | if (r < 0 && r != -EEXIST) |
1814 | return log_error_errno(r, "Failed to create /run/udev: %m"); | |
712cebf1 | 1815 | |
03cfe0d5 | 1816 | dev_setup(NULL, UID_INVALID, GID_INVALID); |
912541b0 | 1817 | |
c26d1879 TG |
1818 | if (getppid() == 1) { |
1819 | /* get our own cgroup, we regularly kill everything udev has left behind | |
1820 | we only do this on systemd systems, and only if we are directly spawned | |
1821 | by PID1. otherwise we are not guaranteed to have a dedicated cgroup */ | |
1822 | r = cg_pid_get_path(SYSTEMD_CGROUP_CONTROLLER, 0, &cgroup); | |
11b9fb15 | 1823 | if (r < 0) { |
a2d61f07 | 1824 | if (IN_SET(r, -ENOENT, -ENOMEDIUM)) |
044497e2 | 1825 | log_debug_errno(r, "Dedicated cgroup not found: %m"); |
11b9fb15 | 1826 | else |
044497e2 | 1827 | log_warning_errno(r, "Failed to get cgroup: %m"); |
11b9fb15 | 1828 | } |
c26d1879 TG |
1829 | } |
1830 | ||
b7f74dd4 | 1831 | r = listen_fds(&fd_ctrl, &fd_uevent); |
0c5a109a ZJS |
1832 | if (r < 0) |
1833 | return log_error_errno(r, "Failed to listen on fds: %m"); | |
b7f74dd4 | 1834 | |
bba7a484 | 1835 | if (arg_daemonize) { |
912541b0 | 1836 | pid_t pid; |
912541b0 | 1837 | |
948aaa7c | 1838 | log_info("starting version " PACKAGE_VERSION); |
3cbb2057 | 1839 | |
40e749b5 | 1840 | /* connect /dev/null to stdin, stdout, stderr */ |
c76cf844 AK |
1841 | if (log_get_max_level() < LOG_DEBUG) { |
1842 | r = make_null_stdio(); | |
1843 | if (r < 0) | |
1844 | log_warning_errno(r, "Failed to redirect standard streams to /dev/null: %m"); | |
1845 | } | |
1846 | ||
912541b0 | 1847 | pid = fork(); |
0c5a109a ZJS |
1848 | if (pid < 0) |
1849 | return log_error_errno(errno, "Failed to fork daemon: %m"); | |
1850 | if (pid > 0) | |
1851 | /* parent */ | |
1852 | return 0; | |
912541b0 | 1853 | |
0c5a109a | 1854 | /* child */ |
ece0fe12 | 1855 | (void) setsid(); |
912541b0 | 1856 | |
76cdddfb YW |
1857 | r = set_oom_score_adjust(-1000); |
1858 | if (r < 0) | |
1859 | log_debug_errno(r, "Failed to adjust OOM score, ignoring: %m"); | |
7500cd5e | 1860 | } |
912541b0 | 1861 | |
0c5a109a | 1862 | return main_loop(fd_ctrl, fd_uevent, cgroup); |
7fafc032 | 1863 | } |
0c5a109a ZJS |
1864 | |
1865 | DEFINE_MAIN_FUNCTION(run); |