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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" |
618234a5 | 49 | #include "netlink-util.h" |
6bedfcbb | 50 | #include "parse-util.h" |
4e731273 | 51 | #include "proc-cmdline.h" |
618234a5 LP |
52 | #include "process-util.h" |
53 | #include "selinux-util.h" | |
54 | #include "signal-util.h" | |
8f328d36 | 55 | #include "socket-util.h" |
07630cea | 56 | #include "string-util.h" |
46f0fbd8 | 57 | #include "syslog-util.h" |
618234a5 | 58 | #include "terminal-util.h" |
07a26e42 | 59 | #include "udev-builtin.h" |
7d68eb1b | 60 | #include "udev-ctrl.h" |
618234a5 | 61 | #include "udev-util.h" |
70068602 | 62 | #include "udev-watch.h" |
618234a5 | 63 | #include "udev.h" |
ee104e11 | 64 | #include "user-util.h" |
7fafc032 | 65 | |
bba7a484 TG |
66 | static bool arg_debug = false; |
67 | static int arg_daemonize = false; | |
c4d44cba | 68 | static ResolveNameTiming arg_resolve_name_timing = RESOLVE_NAME_EARLY; |
216e8bbe | 69 | static unsigned arg_children_max = 0; |
6b92f429 | 70 | static usec_t arg_exec_delay_usec = 0; |
bba7a484 | 71 | static usec_t arg_event_timeout_usec = 180 * USEC_PER_SEC; |
c0c6806b TG |
72 | |
73 | typedef struct Manager { | |
693d371d | 74 | sd_event *event; |
c0c6806b | 75 | Hashmap *workers; |
40a57716 | 76 | LIST_HEAD(struct event, events); |
c26d1879 | 77 | const char *cgroup; |
cb49a4f2 | 78 | pid_t pid; /* the process that originally allocated the manager object */ |
c0c6806b | 79 | |
ecb17862 | 80 | struct udev_rules *rules; |
9b5150b6 | 81 | Hashmap *properties; |
c0c6806b | 82 | |
0bed242c YW |
83 | sd_netlink *rtnl; |
84 | ||
7f2e3a14 | 85 | sd_device_monitor *monitor; |
c0c6806b TG |
86 | struct udev_ctrl *ctrl; |
87 | struct udev_ctrl_connection *ctrl_conn_blocking; | |
e237d8cb | 88 | int fd_inotify; |
e237d8cb TG |
89 | int worker_watch[2]; |
90 | ||
693d371d TG |
91 | sd_event_source *ctrl_event; |
92 | sd_event_source *uevent_event; | |
93 | sd_event_source *inotify_event; | |
eca195ec | 94 | sd_event_source *kill_workers_event; |
693d371d | 95 | |
7c4c7e89 TG |
96 | usec_t last_usec; |
97 | ||
c0c6806b | 98 | bool stop_exec_queue:1; |
c0c6806b TG |
99 | bool exit:1; |
100 | } Manager; | |
1e03b754 | 101 | |
1e03b754 | 102 | enum event_state { |
912541b0 KS |
103 | EVENT_UNDEF, |
104 | EVENT_QUEUED, | |
105 | EVENT_RUNNING, | |
1e03b754 KS |
106 | }; |
107 | ||
108 | struct event { | |
40a57716 | 109 | LIST_FIELDS(struct event, event); |
cb49a4f2 | 110 | Manager *manager; |
912541b0 | 111 | struct udev_device *dev; |
6969c349 | 112 | struct udev_device *dev_kernel; |
c6aa11f2 | 113 | struct worker *worker; |
912541b0 | 114 | enum event_state state; |
912541b0 KS |
115 | unsigned long long int delaying_seqnum; |
116 | unsigned long long int seqnum; | |
117 | const char *devpath; | |
118 | size_t devpath_len; | |
119 | const char *devpath_old; | |
120 | dev_t devnum; | |
912541b0 | 121 | int ifindex; |
ea6039a3 | 122 | bool is_block; |
693d371d TG |
123 | sd_event_source *timeout_warning; |
124 | sd_event_source *timeout; | |
1e03b754 KS |
125 | }; |
126 | ||
ecb17862 | 127 | static void event_queue_cleanup(Manager *manager, enum event_state type); |
ff2c503d | 128 | |
1e03b754 | 129 | enum worker_state { |
912541b0 KS |
130 | WORKER_UNDEF, |
131 | WORKER_RUNNING, | |
132 | WORKER_IDLE, | |
133 | WORKER_KILLED, | |
1e03b754 KS |
134 | }; |
135 | ||
136 | struct worker { | |
c0c6806b | 137 | Manager *manager; |
912541b0 | 138 | pid_t pid; |
7f2e3a14 | 139 | sd_device_monitor *monitor; |
912541b0 KS |
140 | enum worker_state state; |
141 | struct event *event; | |
1e03b754 KS |
142 | }; |
143 | ||
144 | /* passed from worker to main process */ | |
145 | struct worker_message { | |
1e03b754 KS |
146 | }; |
147 | ||
c6aa11f2 | 148 | static void event_free(struct event *event) { |
cb49a4f2 TG |
149 | int r; |
150 | ||
c6aa11f2 TG |
151 | if (!event) |
152 | return; | |
40a57716 | 153 | assert(event->manager); |
c6aa11f2 | 154 | |
40a57716 | 155 | LIST_REMOVE(event, event->manager->events, event); |
912541b0 | 156 | udev_device_unref(event->dev); |
6969c349 | 157 | udev_device_unref(event->dev_kernel); |
c6aa11f2 | 158 | |
693d371d TG |
159 | sd_event_source_unref(event->timeout_warning); |
160 | sd_event_source_unref(event->timeout); | |
161 | ||
c6aa11f2 TG |
162 | if (event->worker) |
163 | event->worker->event = NULL; | |
164 | ||
40a57716 | 165 | if (LIST_IS_EMPTY(event->manager->events)) { |
cb49a4f2 | 166 | /* only clean up the queue from the process that created it */ |
df0ff127 | 167 | if (event->manager->pid == getpid_cached()) { |
cb49a4f2 TG |
168 | r = unlink("/run/udev/queue"); |
169 | if (r < 0) | |
170 | log_warning_errno(errno, "could not unlink /run/udev/queue: %m"); | |
171 | } | |
172 | } | |
173 | ||
912541b0 | 174 | free(event); |
aa8734ff | 175 | } |
7a770250 | 176 | |
c6aa11f2 TG |
177 | static void worker_free(struct worker *worker) { |
178 | if (!worker) | |
179 | return; | |
bc113de9 | 180 | |
c0c6806b TG |
181 | assert(worker->manager); |
182 | ||
4a0b58c4 | 183 | hashmap_remove(worker->manager->workers, PID_TO_PTR(worker->pid)); |
7f2e3a14 | 184 | sd_device_monitor_unref(worker->monitor); |
c6aa11f2 TG |
185 | event_free(worker->event); |
186 | ||
c6aa11f2 | 187 | free(worker); |
ff2c503d KS |
188 | } |
189 | ||
c0c6806b | 190 | static void manager_workers_free(Manager *manager) { |
a505965d TG |
191 | struct worker *worker; |
192 | Iterator i; | |
ff2c503d | 193 | |
c0c6806b TG |
194 | assert(manager); |
195 | ||
196 | HASHMAP_FOREACH(worker, manager->workers, i) | |
c6aa11f2 | 197 | worker_free(worker); |
a505965d | 198 | |
c0c6806b | 199 | manager->workers = hashmap_free(manager->workers); |
fc465079 KS |
200 | } |
201 | ||
7f2e3a14 | 202 | static int worker_new(struct worker **ret, Manager *manager, sd_device_monitor *worker_monitor, pid_t pid) { |
a505965d TG |
203 | _cleanup_free_ struct worker *worker = NULL; |
204 | int r; | |
3a19b32a TG |
205 | |
206 | assert(ret); | |
c0c6806b | 207 | assert(manager); |
3a19b32a TG |
208 | assert(worker_monitor); |
209 | assert(pid > 1); | |
210 | ||
211 | worker = new0(struct worker, 1); | |
212 | if (!worker) | |
213 | return -ENOMEM; | |
214 | ||
c0c6806b | 215 | worker->manager = manager; |
3a19b32a | 216 | /* close monitor, but keep address around */ |
7f2e3a14 YW |
217 | device_monitor_disconnect(worker_monitor); |
218 | worker->monitor = sd_device_monitor_ref(worker_monitor); | |
3a19b32a | 219 | worker->pid = pid; |
a505965d | 220 | |
c0c6806b | 221 | r = hashmap_ensure_allocated(&manager->workers, NULL); |
a505965d TG |
222 | if (r < 0) |
223 | return r; | |
224 | ||
4a0b58c4 | 225 | r = hashmap_put(manager->workers, PID_TO_PTR(pid), worker); |
a505965d TG |
226 | if (r < 0) |
227 | return r; | |
228 | ||
ae2a15bc | 229 | *ret = TAKE_PTR(worker); |
3a19b32a TG |
230 | |
231 | return 0; | |
232 | } | |
233 | ||
4fa4d885 TG |
234 | static int on_event_timeout(sd_event_source *s, uint64_t usec, void *userdata) { |
235 | struct event *event = userdata; | |
236 | ||
237 | assert(event); | |
238 | assert(event->worker); | |
239 | ||
240 | kill_and_sigcont(event->worker->pid, SIGKILL); | |
241 | event->worker->state = WORKER_KILLED; | |
242 | ||
243 | log_error("seq %llu '%s' killed", udev_device_get_seqnum(event->dev), event->devpath); | |
244 | ||
245 | return 1; | |
246 | } | |
247 | ||
248 | static int on_event_timeout_warning(sd_event_source *s, uint64_t usec, void *userdata) { | |
249 | struct event *event = userdata; | |
250 | ||
251 | assert(event); | |
252 | ||
253 | log_warning("seq %llu '%s' is taking a long time", udev_device_get_seqnum(event->dev), event->devpath); | |
254 | ||
255 | return 1; | |
256 | } | |
257 | ||
39c19cf1 | 258 | static void worker_attach_event(struct worker *worker, struct event *event) { |
693d371d TG |
259 | sd_event *e; |
260 | uint64_t usec; | |
693d371d | 261 | |
c6aa11f2 | 262 | assert(worker); |
693d371d | 263 | assert(worker->manager); |
c6aa11f2 TG |
264 | assert(event); |
265 | assert(!event->worker); | |
266 | assert(!worker->event); | |
267 | ||
39c19cf1 | 268 | worker->state = WORKER_RUNNING; |
39c19cf1 TG |
269 | worker->event = event; |
270 | event->state = EVENT_RUNNING; | |
c6aa11f2 | 271 | event->worker = worker; |
693d371d TG |
272 | |
273 | e = worker->manager->event; | |
274 | ||
3285baa8 | 275 | assert_se(sd_event_now(e, CLOCK_MONOTONIC, &usec) >= 0); |
693d371d | 276 | |
3285baa8 | 277 | (void) sd_event_add_time(e, &event->timeout_warning, CLOCK_MONOTONIC, |
66f737b4 | 278 | usec + udev_warn_timeout(arg_event_timeout_usec), USEC_PER_SEC, on_event_timeout_warning, event); |
693d371d | 279 | |
3285baa8 | 280 | (void) sd_event_add_time(e, &event->timeout, CLOCK_MONOTONIC, |
693d371d | 281 | usec + arg_event_timeout_usec, USEC_PER_SEC, on_event_timeout, event); |
39c19cf1 TG |
282 | } |
283 | ||
0bed242c YW |
284 | static void manager_clear_for_worker(Manager *manager) { |
285 | assert(manager); | |
286 | ||
287 | manager->ctrl_event = sd_event_source_unref(manager->ctrl_event); | |
288 | manager->uevent_event = sd_event_source_unref(manager->uevent_event); | |
289 | manager->inotify_event = sd_event_source_unref(manager->inotify_event); | |
290 | manager->kill_workers_event = sd_event_source_unref(manager->kill_workers_event); | |
291 | ||
292 | manager->event = sd_event_unref(manager->event); | |
293 | ||
294 | manager_workers_free(manager); | |
295 | event_queue_cleanup(manager, EVENT_UNDEF); | |
296 | ||
7f2e3a14 | 297 | manager->monitor = sd_device_monitor_unref(manager->monitor); |
0bed242c YW |
298 | manager->ctrl_conn_blocking = udev_ctrl_connection_unref(manager->ctrl_conn_blocking); |
299 | manager->ctrl = udev_ctrl_unref(manager->ctrl); | |
300 | ||
301 | manager->worker_watch[READ_END] = safe_close(manager->worker_watch[READ_END]); | |
302 | } | |
303 | ||
e237d8cb TG |
304 | static void manager_free(Manager *manager) { |
305 | if (!manager) | |
306 | return; | |
307 | ||
2024ed61 | 308 | udev_builtin_exit(); |
b2d21d93 | 309 | |
0bed242c | 310 | manager_clear_for_worker(manager); |
693d371d | 311 | |
0bed242c | 312 | sd_netlink_unref(manager->rtnl); |
e237d8cb | 313 | |
9b5150b6 | 314 | hashmap_free_free_free(manager->properties); |
e237d8cb | 315 | udev_rules_unref(manager->rules); |
e237d8cb | 316 | |
e237d8cb TG |
317 | safe_close(manager->fd_inotify); |
318 | safe_close_pair(manager->worker_watch); | |
319 | ||
320 | free(manager); | |
321 | } | |
322 | ||
323 | DEFINE_TRIVIAL_CLEANUP_FUNC(Manager*, manager_free); | |
324 | ||
9a73bd7c TG |
325 | static int worker_send_message(int fd) { |
326 | struct worker_message message = {}; | |
327 | ||
328 | return loop_write(fd, &message, sizeof(message), false); | |
329 | } | |
330 | ||
b97897e3 | 331 | static int worker_lock_block_device(sd_device *dev, int *ret_fd) { |
0bed242c | 332 | _cleanup_close_ int fd = -1; |
b97897e3 YW |
333 | const char *val; |
334 | int r; | |
fee854ee | 335 | |
0bed242c YW |
336 | assert(dev); |
337 | assert(ret_fd); | |
338 | ||
339 | /* | |
340 | * Take a shared lock on the device node; this establishes | |
341 | * a concept of device "ownership" to serialize device | |
342 | * access. External processes holding an exclusive lock will | |
343 | * cause udev to skip the event handling; in the case udev | |
344 | * acquired the lock, the external process can block until | |
345 | * udev has finished its event handling. | |
346 | */ | |
347 | ||
b97897e3 YW |
348 | r = sd_device_get_property_value(dev, "ACTION", &val); |
349 | if (r < 0) | |
350 | return log_device_debug_errno(dev, r, "Failed to get the value of property 'ACTION': %m"); | |
351 | ||
352 | if (streq(val, "remove")) | |
0bed242c YW |
353 | return 0; |
354 | ||
b97897e3 YW |
355 | r = sd_device_get_subsystem(dev, &val); |
356 | if (r < 0) | |
357 | return log_device_debug_errno(dev, r, "Failed to get subsystem: %m"); | |
358 | ||
359 | if (!streq(val, "block")) | |
0bed242c | 360 | return 0; |
fee854ee | 361 | |
b97897e3 YW |
362 | r = sd_device_get_sysname(dev, &val); |
363 | if (r < 0) | |
364 | return log_device_debug_errno(dev, r, "Failed to get sysname: %m"); | |
365 | ||
366 | if (startswith(val, "dm-") || | |
367 | startswith(val, "md") || | |
368 | startswith(val, "drbd")) | |
0bed242c YW |
369 | return 0; |
370 | ||
b97897e3 YW |
371 | r = sd_device_get_devtype(dev, &val); |
372 | if (r < 0 && r != -ENOENT) | |
373 | return log_device_debug_errno(dev, r, "Failed to get devtype: %m"); | |
374 | if (r >= 0 && streq(val, "partition")) { | |
375 | r = sd_device_get_parent(dev, &dev); | |
376 | if (r < 0) | |
377 | return log_device_debug_errno(dev, r, "Failed to get parent device: %m"); | |
378 | } | |
0bed242c | 379 | |
b97897e3 YW |
380 | r = sd_device_get_devname(dev, &val); |
381 | if (r == -ENOENT) | |
0bed242c | 382 | return 0; |
b97897e3 YW |
383 | if (r < 0) |
384 | return log_device_debug_errno(dev, r, "Failed to get devname: %m"); | |
0bed242c | 385 | |
b97897e3 YW |
386 | fd = open(val, O_RDONLY|O_CLOEXEC|O_NOFOLLOW|O_NONBLOCK); |
387 | if (fd < 0) { | |
388 | log_device_debug_errno(dev, errno, "Failed to open '%s', ignoring: %m", val); | |
0bed242c | 389 | return 0; |
b97897e3 | 390 | } |
0bed242c YW |
391 | |
392 | if (flock(fd, LOCK_SH|LOCK_NB) < 0) | |
b97897e3 | 393 | return log_device_debug_errno(dev, errno, "Failed to flock(%s): %m", val); |
0bed242c YW |
394 | |
395 | *ret_fd = TAKE_FD(fd); | |
396 | return 1; | |
fee854ee RK |
397 | } |
398 | ||
abde5ea8 | 399 | static int worker_process_device(Manager *manager, sd_device *dev) { |
0bed242c YW |
400 | _cleanup_(udev_event_freep) struct udev_event *udev_event = NULL; |
401 | _cleanup_close_ int fd_lock = -1; | |
abde5ea8 | 402 | const char *seqnum; |
0bed242c | 403 | int r; |
912541b0 | 404 | |
0bed242c YW |
405 | assert(manager); |
406 | assert(dev); | |
407 | ||
abde5ea8 YW |
408 | r = sd_device_get_property_value(dev, "SEQNUM", &seqnum); |
409 | if (r < 0) | |
410 | log_device_debug_errno(dev, r, "Failed to get SEQNUM: %m"); | |
411 | ||
412 | log_device_debug(dev, "Processing device (SEQNUM=%s)", seqnum); | |
413 | ||
414 | udev_event = udev_event_new(dev, arg_exec_delay_usec, manager->rtnl); | |
0bed242c YW |
415 | if (!udev_event) |
416 | return -ENOMEM; | |
417 | ||
abde5ea8 | 418 | r = worker_lock_block_device(dev, &fd_lock); |
b6aab8ef | 419 | if (r < 0) |
0bed242c | 420 | return r; |
912541b0 | 421 | |
0bed242c YW |
422 | /* apply rules, create node, symlinks */ |
423 | udev_event_execute_rules(udev_event, arg_event_timeout_usec, manager->properties, manager->rules); | |
424 | udev_event_execute_run(udev_event, arg_event_timeout_usec); | |
2dd9f98d | 425 | |
0bed242c YW |
426 | if (!manager->rtnl) |
427 | /* in case rtnl was initialized */ | |
428 | manager->rtnl = sd_netlink_ref(udev_event->rtnl); | |
912541b0 | 429 | |
0bed242c YW |
430 | /* apply/restore inotify watch */ |
431 | if (udev_event->inotify_watch) { | |
abde5ea8 YW |
432 | (void) udev_watch_begin(dev); |
433 | r = device_update_db(dev); | |
434 | if (r < 0) | |
435 | return log_device_debug_errno(dev, r, "Failed to update database under /run/udev/data/: %m"); | |
0bed242c | 436 | } |
912541b0 | 437 | |
abde5ea8 | 438 | log_device_debug(dev, "Device (SEQNUM=%s) processed", seqnum); |
912541b0 | 439 | |
0bed242c YW |
440 | return 0; |
441 | } | |
912541b0 | 442 | |
e2130348 YW |
443 | static int worker_device_monitor_handler(sd_device_monitor *monitor, sd_device *dev, void *userdata) { |
444 | Manager *manager = userdata; | |
445 | int r; | |
446 | ||
447 | assert(dev); | |
448 | assert(manager); | |
449 | ||
450 | r = worker_process_device(manager, dev); | |
451 | if (r < 0) | |
452 | log_device_warning_errno(dev, r, "Failed to process device, ignoring: %m"); | |
453 | ||
454 | /* send processed event back to libudev listeners */ | |
455 | r = device_monitor_send_device(monitor, NULL, dev); | |
456 | if (r < 0) | |
457 | log_device_warning_errno(dev, r, "Failed to send device, ignoring: %m"); | |
458 | ||
459 | /* send udevd the result of the event execution */ | |
460 | r = worker_send_message(manager->worker_watch[WRITE_END]); | |
461 | if (r < 0) | |
462 | log_device_warning_errno(dev, r, "Failed to send signal to main daemon, ignoring: %m"); | |
463 | ||
464 | return 1; | |
465 | } | |
466 | ||
7f2e3a14 YW |
467 | static int worker_main(Manager *_manager, sd_device_monitor *monitor, sd_device *first_device) { |
468 | _cleanup_(sd_device_unrefp) sd_device *dev = first_device; | |
0bed242c | 469 | _cleanup_(manager_freep) Manager *manager = _manager; |
e2130348 | 470 | int r, ret; |
145dae7e | 471 | |
0bed242c YW |
472 | assert(manager); |
473 | assert(monitor); | |
474 | assert(dev); | |
912541b0 | 475 | |
0bed242c | 476 | unsetenv("NOTIFY_SOCKET"); |
3b64e4d4 | 477 | |
e2130348 YW |
478 | assert_se(sigprocmask_many(SIG_BLOCK, NULL, SIGTERM, -1) >= 0); |
479 | ||
480 | /* Reset OOM score, we only protect the main daemon. */ | |
481 | r = set_oom_score_adjust(0); | |
482 | if (r < 0) | |
483 | log_debug_errno(r, "Failed to reset OOM score, ignoring: %m"); | |
912541b0 | 484 | |
e2130348 YW |
485 | /* Clear unnecessary data in Manager object.*/ |
486 | manager_clear_for_worker(manager); | |
3ebdb81e | 487 | |
e2130348 YW |
488 | r = sd_event_new(&manager->event); |
489 | if (r < 0) | |
490 | return log_error_errno(r, "Failed to allocate event loop: %m"); | |
912541b0 | 491 | |
e2130348 YW |
492 | r = sd_event_add_signal(manager->event, NULL, SIGTERM, NULL, NULL); |
493 | if (r < 0) | |
494 | return log_error_errno(r, "Failed to set SIGTERM event: %m"); | |
4c83d994 | 495 | |
e2130348 YW |
496 | r = sd_device_monitor_attach_event(monitor, manager->event); |
497 | if (r < 0) | |
498 | return log_error_errno(r, "Failed to attach event loop to device monitor: %m"); | |
912541b0 | 499 | |
e2130348 | 500 | r = sd_device_monitor_start(monitor, worker_device_monitor_handler, manager); |
0bed242c | 501 | if (r < 0) |
e2130348 | 502 | return log_error_errno(r, "Failed to start device monitor: %m"); |
912541b0 | 503 | |
e2130348 | 504 | (void) sd_event_source_set_description(sd_device_monitor_get_event_source(monitor), "worker-device-monitor"); |
b66f29a1 | 505 | |
e2130348 YW |
506 | /* Process first device */ |
507 | (void) worker_device_monitor_handler(monitor, dev, manager); | |
912541b0 | 508 | |
e2130348 YW |
509 | r = sd_event_loop(manager->event); |
510 | if (r < 0) | |
511 | return log_error_errno(r, "Event loop failed: %m"); | |
512 | ||
513 | r = sd_event_get_exit_code(manager->event, &ret); | |
514 | if (r < 0) | |
515 | return log_error_errno(r, "Failed to get exit code: %m"); | |
516 | ||
517 | return ret; | |
0bed242c YW |
518 | } |
519 | ||
7443654e | 520 | static int worker_spawn(Manager *manager, struct event *event) { |
7f2e3a14 | 521 | _cleanup_(sd_device_monitor_unrefp) sd_device_monitor *worker_monitor = NULL; |
7443654e | 522 | struct worker *worker; |
0bed242c | 523 | pid_t pid; |
7443654e | 524 | int r; |
0bed242c YW |
525 | |
526 | /* listen for new events */ | |
7f2e3a14 YW |
527 | r = device_monitor_new_full(&worker_monitor, MONITOR_GROUP_NONE, -1); |
528 | if (r < 0) | |
529 | return r; | |
7443654e | 530 | |
0bed242c | 531 | /* allow the main daemon netlink address to send devices to the worker */ |
7f2e3a14 YW |
532 | r = device_monitor_allow_unicast_sender(worker_monitor, manager->monitor); |
533 | if (r < 0) | |
534 | return log_error_errno(r, "Worker: Failed to set unicast sender: %m"); | |
535 | ||
536 | r = device_monitor_enable_receiving(worker_monitor); | |
0bed242c | 537 | if (r < 0) |
7f2e3a14 | 538 | return log_error_errno(r, "Worker: Failed to enable receiving of device: %m"); |
0bed242c | 539 | |
7443654e YW |
540 | r = safe_fork(NULL, FORK_DEATHSIG, &pid); |
541 | if (r < 0) { | |
542 | event->state = EVENT_QUEUED; | |
543 | return log_error_errno(r, "Failed to fork() worker: %m"); | |
544 | } | |
545 | if (r == 0) { | |
546 | /* Worker process */ | |
7f2e3a14 | 547 | r = worker_main(manager, worker_monitor, sd_device_ref(event->dev->device)); |
baa30fbc | 548 | log_close(); |
8b46c3fc | 549 | _exit(r < 0 ? EXIT_FAILURE : EXIT_SUCCESS); |
912541b0 | 550 | } |
e03c7cc2 | 551 | |
7443654e YW |
552 | r = worker_new(&worker, manager, worker_monitor, pid); |
553 | if (r < 0) | |
554 | return log_error_errno(r, "Failed to create worker object: %m"); | |
e03c7cc2 | 555 | |
7443654e | 556 | worker_attach_event(worker, event); |
39c19cf1 | 557 | |
7443654e YW |
558 | log_device_debug(event->dev->device, "seq %llu forked new worker ["PID_FMT"]", event->seqnum, pid); |
559 | return 0; | |
7fafc032 KS |
560 | } |
561 | ||
c0c6806b | 562 | static void event_run(Manager *manager, struct event *event) { |
a505965d TG |
563 | struct worker *worker; |
564 | Iterator i; | |
7f2e3a14 | 565 | int r; |
912541b0 | 566 | |
c0c6806b TG |
567 | assert(manager); |
568 | assert(event); | |
569 | ||
570 | HASHMAP_FOREACH(worker, manager->workers, i) { | |
912541b0 KS |
571 | if (worker->state != WORKER_IDLE) |
572 | continue; | |
573 | ||
7f2e3a14 YW |
574 | r = device_monitor_send_device(manager->monitor, worker->monitor, event->dev->device); |
575 | if (r < 0) { | |
576 | log_device_error_errno(event->dev->device, r, "Worker ["PID_FMT"] did not accept message, killing the worker: %m", | |
577 | worker->pid); | |
cb542e84 | 578 | (void) kill(worker->pid, SIGKILL); |
912541b0 KS |
579 | worker->state = WORKER_KILLED; |
580 | continue; | |
581 | } | |
39c19cf1 | 582 | worker_attach_event(worker, event); |
912541b0 KS |
583 | return; |
584 | } | |
585 | ||
c0c6806b | 586 | if (hashmap_size(manager->workers) >= arg_children_max) { |
bba7a484 | 587 | if (arg_children_max > 1) |
c0c6806b | 588 | log_debug("maximum number (%i) of children reached", hashmap_size(manager->workers)); |
912541b0 KS |
589 | return; |
590 | } | |
591 | ||
592 | /* start new worker and pass initial device */ | |
c0c6806b | 593 | worker_spawn(manager, event); |
1e03b754 KS |
594 | } |
595 | ||
ecb17862 | 596 | static int event_queue_insert(Manager *manager, struct udev_device *dev) { |
912541b0 | 597 | struct event *event; |
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 | |
955d98c9 | 609 | event = new0(struct event, 1); |
cb49a4f2 TG |
610 | if (!event) |
611 | return -ENOMEM; | |
912541b0 | 612 | |
cb49a4f2 | 613 | event->manager = manager; |
912541b0 | 614 | event->dev = dev; |
6969c349 TG |
615 | event->dev_kernel = udev_device_shallow_clone(dev); |
616 | udev_device_copy_properties(event->dev_kernel, dev); | |
912541b0 KS |
617 | event->seqnum = udev_device_get_seqnum(dev); |
618 | event->devpath = udev_device_get_devpath(dev); | |
619 | event->devpath_len = strlen(event->devpath); | |
620 | event->devpath_old = udev_device_get_devpath_old(dev); | |
621 | event->devnum = udev_device_get_devnum(dev); | |
ea6039a3 | 622 | event->is_block = streq("block", udev_device_get_subsystem(dev)); |
912541b0 KS |
623 | event->ifindex = udev_device_get_ifindex(dev); |
624 | ||
9f6445e3 | 625 | log_debug("seq %llu queued, '%s' '%s'", udev_device_get_seqnum(dev), |
912541b0 KS |
626 | udev_device_get_action(dev), udev_device_get_subsystem(dev)); |
627 | ||
628 | event->state = EVENT_QUEUED; | |
cb49a4f2 | 629 | |
40a57716 | 630 | if (LIST_IS_EMPTY(manager->events)) { |
cb49a4f2 TG |
631 | r = touch("/run/udev/queue"); |
632 | if (r < 0) | |
633 | log_warning_errno(r, "could not touch /run/udev/queue: %m"); | |
634 | } | |
635 | ||
40a57716 | 636 | LIST_APPEND(event, manager->events, event); |
cb49a4f2 | 637 | |
912541b0 | 638 | return 0; |
fc465079 KS |
639 | } |
640 | ||
c0c6806b | 641 | static void manager_kill_workers(Manager *manager) { |
a505965d TG |
642 | struct worker *worker; |
643 | Iterator i; | |
1e03b754 | 644 | |
c0c6806b TG |
645 | assert(manager); |
646 | ||
647 | HASHMAP_FOREACH(worker, manager->workers, i) { | |
912541b0 KS |
648 | if (worker->state == WORKER_KILLED) |
649 | continue; | |
1e03b754 | 650 | |
912541b0 | 651 | worker->state = WORKER_KILLED; |
cb542e84 | 652 | (void) kill(worker->pid, SIGTERM); |
912541b0 | 653 | } |
1e03b754 KS |
654 | } |
655 | ||
e3196993 | 656 | /* lookup event for identical, parent, child device */ |
ecb17862 | 657 | static bool is_devpath_busy(Manager *manager, struct event *event) { |
40a57716 | 658 | struct event *loop_event; |
912541b0 KS |
659 | size_t common; |
660 | ||
661 | /* check if queue contains events we depend on */ | |
40a57716 | 662 | LIST_FOREACH(event, loop_event, manager->events) { |
87ac8d99 | 663 | /* we already found a later event, earlier cannot block us, no need to check again */ |
912541b0 KS |
664 | if (loop_event->seqnum < event->delaying_seqnum) |
665 | continue; | |
666 | ||
667 | /* event we checked earlier still exists, no need to check again */ | |
668 | if (loop_event->seqnum == event->delaying_seqnum) | |
669 | return true; | |
670 | ||
671 | /* found ourself, no later event can block us */ | |
672 | if (loop_event->seqnum >= event->seqnum) | |
673 | break; | |
674 | ||
675 | /* check major/minor */ | |
676 | if (major(event->devnum) != 0 && event->devnum == loop_event->devnum && event->is_block == loop_event->is_block) | |
677 | return true; | |
678 | ||
679 | /* check network device ifindex */ | |
edc81c1c | 680 | if (event->ifindex > 0 && event->ifindex == loop_event->ifindex) |
912541b0 KS |
681 | return true; |
682 | ||
683 | /* check our old name */ | |
edc81c1c | 684 | if (event->devpath_old && streq(loop_event->devpath, event->devpath_old)) { |
912541b0 KS |
685 | event->delaying_seqnum = loop_event->seqnum; |
686 | return true; | |
687 | } | |
688 | ||
689 | /* compare devpath */ | |
690 | common = MIN(loop_event->devpath_len, event->devpath_len); | |
691 | ||
692 | /* one devpath is contained in the other? */ | |
693 | if (memcmp(loop_event->devpath, event->devpath, common) != 0) | |
694 | continue; | |
695 | ||
696 | /* identical device event found */ | |
697 | if (loop_event->devpath_len == event->devpath_len) { | |
698 | /* devices names might have changed/swapped in the meantime */ | |
edc81c1c | 699 | if (major(event->devnum) != 0 || event->ifindex > 0) |
912541b0 KS |
700 | continue; |
701 | event->delaying_seqnum = loop_event->seqnum; | |
702 | return true; | |
703 | } | |
704 | ||
705 | /* parent device event found */ | |
706 | if (event->devpath[common] == '/') { | |
707 | event->delaying_seqnum = loop_event->seqnum; | |
708 | return true; | |
709 | } | |
710 | ||
711 | /* child device event found */ | |
712 | if (loop_event->devpath[common] == '/') { | |
713 | event->delaying_seqnum = loop_event->seqnum; | |
714 | return true; | |
715 | } | |
912541b0 KS |
716 | } |
717 | ||
718 | return false; | |
7fafc032 KS |
719 | } |
720 | ||
693d371d TG |
721 | static int on_exit_timeout(sd_event_source *s, uint64_t usec, void *userdata) { |
722 | Manager *manager = userdata; | |
723 | ||
724 | assert(manager); | |
725 | ||
726 | log_error_errno(ETIMEDOUT, "giving up waiting for workers to finish"); | |
727 | ||
728 | sd_event_exit(manager->event, -ETIMEDOUT); | |
729 | ||
730 | return 1; | |
731 | } | |
732 | ||
62d43dac | 733 | static void manager_exit(Manager *manager) { |
693d371d TG |
734 | uint64_t usec; |
735 | int r; | |
62d43dac TG |
736 | |
737 | assert(manager); | |
738 | ||
739 | manager->exit = true; | |
740 | ||
b79aacbf TG |
741 | sd_notify(false, |
742 | "STOPPING=1\n" | |
743 | "STATUS=Starting shutdown..."); | |
744 | ||
62d43dac | 745 | /* close sources of new events and discard buffered events */ |
693d371d | 746 | manager->ctrl_event = sd_event_source_unref(manager->ctrl_event); |
ab7854df | 747 | manager->ctrl = udev_ctrl_unref(manager->ctrl); |
62d43dac | 748 | |
693d371d | 749 | manager->inotify_event = sd_event_source_unref(manager->inotify_event); |
ab7854df | 750 | manager->fd_inotify = safe_close(manager->fd_inotify); |
62d43dac | 751 | |
693d371d | 752 | manager->uevent_event = sd_event_source_unref(manager->uevent_event); |
7f2e3a14 | 753 | manager->monitor = sd_device_monitor_unref(manager->monitor); |
62d43dac TG |
754 | |
755 | /* discard queued events and kill workers */ | |
756 | event_queue_cleanup(manager, EVENT_QUEUED); | |
757 | manager_kill_workers(manager); | |
693d371d | 758 | |
3285baa8 | 759 | assert_se(sd_event_now(manager->event, CLOCK_MONOTONIC, &usec) >= 0); |
693d371d | 760 | |
3285baa8 | 761 | r = sd_event_add_time(manager->event, NULL, CLOCK_MONOTONIC, |
693d371d TG |
762 | usec + 30 * USEC_PER_SEC, USEC_PER_SEC, on_exit_timeout, manager); |
763 | if (r < 0) | |
764 | return; | |
62d43dac TG |
765 | } |
766 | ||
767 | /* reload requested, HUP signal received, rules changed, builtin changed */ | |
768 | static void manager_reload(Manager *manager) { | |
769 | ||
770 | assert(manager); | |
771 | ||
b79aacbf TG |
772 | sd_notify(false, |
773 | "RELOADING=1\n" | |
774 | "STATUS=Flushing configuration..."); | |
775 | ||
62d43dac TG |
776 | manager_kill_workers(manager); |
777 | manager->rules = udev_rules_unref(manager->rules); | |
2024ed61 | 778 | udev_builtin_exit(); |
b79aacbf | 779 | |
1ef72b55 MS |
780 | sd_notifyf(false, |
781 | "READY=1\n" | |
782 | "STATUS=Processing with %u children at max", arg_children_max); | |
62d43dac TG |
783 | } |
784 | ||
eca195ec YW |
785 | static int on_kill_workers_event(sd_event_source *s, uint64_t usec, void *userdata) { |
786 | Manager *manager = userdata; | |
787 | ||
788 | assert(manager); | |
789 | ||
790 | log_debug("Cleanup idle workers"); | |
791 | manager_kill_workers(manager); | |
792 | ||
793 | return 1; | |
794 | } | |
795 | ||
c0c6806b | 796 | static void event_queue_start(Manager *manager) { |
40a57716 | 797 | struct event *event; |
693d371d | 798 | usec_t usec; |
0725c4b9 | 799 | int r; |
8ab44e3f | 800 | |
c0c6806b TG |
801 | assert(manager); |
802 | ||
40a57716 | 803 | if (LIST_IS_EMPTY(manager->events) || |
7c4c7e89 TG |
804 | manager->exit || manager->stop_exec_queue) |
805 | return; | |
806 | ||
3285baa8 | 807 | assert_se(sd_event_now(manager->event, CLOCK_MONOTONIC, &usec) >= 0); |
38a03f06 LP |
808 | /* check for changed config, every 3 seconds at most */ |
809 | if (manager->last_usec == 0 || | |
810 | (usec - manager->last_usec) > 3 * USEC_PER_SEC) { | |
811 | if (udev_rules_check_timestamp(manager->rules) || | |
2024ed61 | 812 | udev_builtin_validate()) |
38a03f06 | 813 | manager_reload(manager); |
693d371d | 814 | |
38a03f06 | 815 | manager->last_usec = usec; |
7c4c7e89 TG |
816 | } |
817 | ||
0725c4b9 YW |
818 | r = event_source_disable(manager->kill_workers_event); |
819 | if (r < 0) | |
820 | log_warning_errno(r, "Failed to disable event source for cleaning up idle workers, ignoring: %m"); | |
eca195ec | 821 | |
2024ed61 | 822 | udev_builtin_init(); |
7c4c7e89 TG |
823 | |
824 | if (!manager->rules) { | |
c4d44cba | 825 | manager->rules = udev_rules_new(arg_resolve_name_timing); |
7c4c7e89 TG |
826 | if (!manager->rules) |
827 | return; | |
828 | } | |
829 | ||
40a57716 | 830 | LIST_FOREACH(event,event,manager->events) { |
912541b0 KS |
831 | if (event->state != EVENT_QUEUED) |
832 | continue; | |
0bc74ea7 | 833 | |
912541b0 | 834 | /* do not start event if parent or child event is still running */ |
ecb17862 | 835 | if (is_devpath_busy(manager, event)) |
912541b0 | 836 | continue; |
fc465079 | 837 | |
c0c6806b | 838 | event_run(manager, event); |
912541b0 | 839 | } |
1e03b754 KS |
840 | } |
841 | ||
ecb17862 | 842 | static void event_queue_cleanup(Manager *manager, enum event_state match_type) { |
40a57716 | 843 | struct event *event, *tmp; |
ff2c503d | 844 | |
40a57716 | 845 | LIST_FOREACH_SAFE(event, event, tmp, manager->events) { |
912541b0 KS |
846 | if (match_type != EVENT_UNDEF && match_type != event->state) |
847 | continue; | |
ff2c503d | 848 | |
c6aa11f2 | 849 | event_free(event); |
912541b0 | 850 | } |
ff2c503d KS |
851 | } |
852 | ||
e82e8fa5 | 853 | static int on_worker(sd_event_source *s, int fd, uint32_t revents, void *userdata) { |
c0c6806b TG |
854 | Manager *manager = userdata; |
855 | ||
856 | assert(manager); | |
857 | ||
912541b0 KS |
858 | for (;;) { |
859 | struct worker_message msg; | |
979558f3 TG |
860 | struct iovec iovec = { |
861 | .iov_base = &msg, | |
862 | .iov_len = sizeof(msg), | |
863 | }; | |
864 | union { | |
865 | struct cmsghdr cmsghdr; | |
866 | uint8_t buf[CMSG_SPACE(sizeof(struct ucred))]; | |
867 | } control = {}; | |
868 | struct msghdr msghdr = { | |
869 | .msg_iov = &iovec, | |
870 | .msg_iovlen = 1, | |
871 | .msg_control = &control, | |
872 | .msg_controllen = sizeof(control), | |
873 | }; | |
874 | struct cmsghdr *cmsg; | |
912541b0 | 875 | ssize_t size; |
979558f3 | 876 | struct ucred *ucred = NULL; |
a505965d | 877 | struct worker *worker; |
912541b0 | 878 | |
e82e8fa5 | 879 | size = recvmsg(fd, &msghdr, MSG_DONTWAIT); |
979558f3 | 880 | if (size < 0) { |
738a7907 TG |
881 | if (errno == EINTR) |
882 | continue; | |
883 | else if (errno == EAGAIN) | |
884 | /* nothing more to read */ | |
885 | break; | |
979558f3 | 886 | |
e82e8fa5 | 887 | return log_error_errno(errno, "failed to receive message: %m"); |
979558f3 TG |
888 | } else if (size != sizeof(struct worker_message)) { |
889 | log_warning_errno(EIO, "ignoring worker message with invalid size %zi bytes", size); | |
e82e8fa5 | 890 | continue; |
979558f3 TG |
891 | } |
892 | ||
2a1288ff | 893 | CMSG_FOREACH(cmsg, &msghdr) { |
979558f3 TG |
894 | if (cmsg->cmsg_level == SOL_SOCKET && |
895 | cmsg->cmsg_type == SCM_CREDENTIALS && | |
896 | cmsg->cmsg_len == CMSG_LEN(sizeof(struct ucred))) | |
897 | ucred = (struct ucred*) CMSG_DATA(cmsg); | |
898 | } | |
899 | ||
900 | if (!ucred || ucred->pid <= 0) { | |
901 | log_warning_errno(EIO, "ignoring worker message without valid PID"); | |
902 | continue; | |
903 | } | |
912541b0 KS |
904 | |
905 | /* lookup worker who sent the signal */ | |
4a0b58c4 | 906 | worker = hashmap_get(manager->workers, PID_TO_PTR(ucred->pid)); |
a505965d TG |
907 | if (!worker) { |
908 | log_debug("worker ["PID_FMT"] returned, but is no longer tracked", ucred->pid); | |
909 | continue; | |
912541b0 | 910 | } |
c0bbfd72 | 911 | |
a505965d TG |
912 | if (worker->state != WORKER_KILLED) |
913 | worker->state = WORKER_IDLE; | |
914 | ||
915 | /* worker returned */ | |
916 | event_free(worker->event); | |
912541b0 | 917 | } |
e82e8fa5 | 918 | |
8302fe5a TG |
919 | /* we have free workers, try to schedule events */ |
920 | event_queue_start(manager); | |
921 | ||
e82e8fa5 TG |
922 | return 1; |
923 | } | |
924 | ||
f00d2b6d | 925 | static int on_uevent(sd_device_monitor *monitor, sd_device *dev, void *userdata) { |
7f2e3a14 | 926 | _cleanup_(udev_device_unrefp) struct udev_device *udev_device = NULL; |
c0c6806b | 927 | Manager *manager = userdata; |
e82e8fa5 TG |
928 | int r; |
929 | ||
c0c6806b | 930 | assert(manager); |
e82e8fa5 | 931 | |
7f2e3a14 YW |
932 | device_ensure_usec_initialized(dev, NULL); |
933 | ||
934 | udev_device = udev_device_new(NULL, dev); | |
935 | if (!udev_device) | |
936 | return 1; | |
937 | ||
938 | r = event_queue_insert(manager, udev_device); | |
939 | if (r < 0) | |
940 | return 1; | |
941 | ||
942 | udev_device = NULL; | |
943 | ||
944 | /* we have fresh events, try to schedule them */ | |
945 | event_queue_start(manager); | |
e82e8fa5 TG |
946 | |
947 | return 1; | |
88f4b648 KS |
948 | } |
949 | ||
3b47c739 | 950 | /* receive the udevd message from userspace */ |
e82e8fa5 | 951 | static int on_ctrl_msg(sd_event_source *s, int fd, uint32_t revents, void *userdata) { |
c0c6806b | 952 | Manager *manager = userdata; |
8e766630 LP |
953 | _cleanup_(udev_ctrl_connection_unrefp) struct udev_ctrl_connection *ctrl_conn = NULL; |
954 | _cleanup_(udev_ctrl_msg_unrefp) struct udev_ctrl_msg *ctrl_msg = NULL; | |
912541b0 | 955 | const char *str; |
9b5150b6 | 956 | int i, r; |
912541b0 | 957 | |
c0c6806b | 958 | assert(manager); |
e4f66b77 | 959 | |
c0c6806b | 960 | ctrl_conn = udev_ctrl_get_connection(manager->ctrl); |
e4f66b77 | 961 | if (!ctrl_conn) |
e82e8fa5 | 962 | return 1; |
912541b0 KS |
963 | |
964 | ctrl_msg = udev_ctrl_receive_msg(ctrl_conn); | |
e4f66b77 | 965 | if (!ctrl_msg) |
e82e8fa5 | 966 | return 1; |
912541b0 KS |
967 | |
968 | i = udev_ctrl_get_set_log_level(ctrl_msg); | |
969 | if (i >= 0) { | |
ed14edc0 | 970 | log_debug("udevd message (SET_LOG_LEVEL) received, log_priority=%i", i); |
baa30fbc | 971 | log_set_max_level(i); |
c0c6806b | 972 | manager_kill_workers(manager); |
912541b0 KS |
973 | } |
974 | ||
975 | if (udev_ctrl_get_stop_exec_queue(ctrl_msg) > 0) { | |
9f6445e3 | 976 | log_debug("udevd message (STOP_EXEC_QUEUE) received"); |
c0c6806b | 977 | manager->stop_exec_queue = true; |
912541b0 KS |
978 | } |
979 | ||
980 | if (udev_ctrl_get_start_exec_queue(ctrl_msg) > 0) { | |
9f6445e3 | 981 | log_debug("udevd message (START_EXEC_QUEUE) received"); |
c0c6806b | 982 | manager->stop_exec_queue = false; |
8302fe5a | 983 | event_queue_start(manager); |
912541b0 KS |
984 | } |
985 | ||
986 | if (udev_ctrl_get_reload(ctrl_msg) > 0) { | |
9f6445e3 | 987 | log_debug("udevd message (RELOAD) received"); |
62d43dac | 988 | manager_reload(manager); |
912541b0 KS |
989 | } |
990 | ||
991 | str = udev_ctrl_get_set_env(ctrl_msg); | |
9b5150b6 YW |
992 | if (str) { |
993 | _cleanup_free_ char *key = NULL, *val = NULL, *old_key = NULL, *old_val = NULL; | |
994 | char *eq; | |
995 | ||
996 | eq = strchr(str, '='); | |
997 | if (!eq) { | |
998 | log_error("Invalid key format '%s'", str); | |
999 | return 1; | |
1000 | } | |
1001 | ||
1002 | key = strndup(str, eq - str); | |
1003 | if (!key) { | |
1004 | log_oom(); | |
1005 | return 1; | |
1006 | } | |
1007 | ||
1008 | old_val = hashmap_remove2(manager->properties, key, (void **) &old_key); | |
1009 | ||
1010 | r = hashmap_ensure_allocated(&manager->properties, &string_hash_ops); | |
1011 | if (r < 0) { | |
1012 | log_oom(); | |
1013 | return 1; | |
912541b0 | 1014 | } |
9b5150b6 YW |
1015 | |
1016 | eq++; | |
1017 | if (!isempty(eq)) { | |
1018 | log_debug("udevd message (ENV) received, unset '%s'", key); | |
1019 | ||
1020 | r = hashmap_put(manager->properties, key, NULL); | |
1021 | if (r < 0) { | |
1022 | log_oom(); | |
1023 | return 1; | |
1024 | } | |
1025 | } else { | |
1026 | val = strdup(eq); | |
1027 | if (!val) { | |
1028 | log_oom(); | |
1029 | return 1; | |
1030 | } | |
1031 | ||
1032 | log_debug("udevd message (ENV) received, set '%s=%s'", key, val); | |
1033 | ||
1034 | r = hashmap_put(manager->properties, key, val); | |
1035 | if (r < 0) { | |
1036 | log_oom(); | |
1037 | return 1; | |
1038 | } | |
1039 | } | |
1040 | ||
1041 | key = val = NULL; | |
c0c6806b | 1042 | manager_kill_workers(manager); |
912541b0 KS |
1043 | } |
1044 | ||
1045 | i = udev_ctrl_get_set_children_max(ctrl_msg); | |
1046 | if (i >= 0) { | |
9f6445e3 | 1047 | log_debug("udevd message (SET_MAX_CHILDREN) received, children_max=%i", i); |
bba7a484 | 1048 | arg_children_max = i; |
1ef72b55 MS |
1049 | |
1050 | (void) sd_notifyf(false, | |
1051 | "READY=1\n" | |
1052 | "STATUS=Processing with %u children at max", arg_children_max); | |
912541b0 KS |
1053 | } |
1054 | ||
cb49a4f2 | 1055 | if (udev_ctrl_get_ping(ctrl_msg) > 0) |
9f6445e3 | 1056 | log_debug("udevd message (SYNC) received"); |
912541b0 KS |
1057 | |
1058 | if (udev_ctrl_get_exit(ctrl_msg) > 0) { | |
9f6445e3 | 1059 | log_debug("udevd message (EXIT) received"); |
62d43dac | 1060 | manager_exit(manager); |
c0c6806b TG |
1061 | /* keep reference to block the client until we exit |
1062 | TODO: deal with several blocking exit requests */ | |
1063 | manager->ctrl_conn_blocking = udev_ctrl_connection_ref(ctrl_conn); | |
912541b0 | 1064 | } |
e4f66b77 | 1065 | |
e82e8fa5 | 1066 | return 1; |
88f4b648 | 1067 | } |
4a231017 | 1068 | |
70068602 YW |
1069 | static int synthesize_change(sd_device *dev) { |
1070 | const char *subsystem, *sysname, *devname, *syspath, *devtype; | |
1071 | char filename[PATH_MAX]; | |
f3a740a5 | 1072 | int r; |
edd32000 | 1073 | |
70068602 YW |
1074 | r = sd_device_get_subsystem(dev, &subsystem); |
1075 | if (r < 0) | |
1076 | return r; | |
1077 | ||
1078 | r = sd_device_get_sysname(dev, &sysname); | |
1079 | if (r < 0) | |
1080 | return r; | |
1081 | ||
1082 | r = sd_device_get_devname(dev, &devname); | |
1083 | if (r < 0) | |
1084 | return r; | |
1085 | ||
1086 | r = sd_device_get_syspath(dev, &syspath); | |
1087 | if (r < 0) | |
1088 | return r; | |
1089 | ||
1090 | r = sd_device_get_devtype(dev, &devtype); | |
1091 | if (r < 0) | |
1092 | return r; | |
1093 | ||
1094 | if (streq_ptr("block", subsystem) && | |
1095 | streq_ptr("disk", devtype) && | |
1096 | !startswith(sysname, "dm-")) { | |
1097 | _cleanup_(sd_device_enumerator_unrefp) sd_device_enumerator *e = NULL; | |
1098 | bool part_table_read = false, has_partitions = false; | |
1099 | sd_device *d; | |
ede34445 | 1100 | int fd; |
f3a740a5 | 1101 | |
ede34445 | 1102 | /* |
e9fc29f4 KS |
1103 | * Try to re-read the partition table. This only succeeds if |
1104 | * none of the devices is busy. The kernel returns 0 if no | |
1105 | * partition table is found, and we will not get an event for | |
1106 | * the disk. | |
ede34445 | 1107 | */ |
70068602 | 1108 | fd = open(devname, O_RDONLY|O_CLOEXEC|O_NOFOLLOW|O_NONBLOCK); |
ede34445 | 1109 | if (fd >= 0) { |
02ba8fb3 KS |
1110 | r = flock(fd, LOCK_EX|LOCK_NB); |
1111 | if (r >= 0) | |
1112 | r = ioctl(fd, BLKRRPART, 0); | |
1113 | ||
ede34445 KS |
1114 | close(fd); |
1115 | if (r >= 0) | |
e9fc29f4 | 1116 | part_table_read = true; |
ede34445 KS |
1117 | } |
1118 | ||
e9fc29f4 | 1119 | /* search for partitions */ |
70068602 | 1120 | r = sd_device_enumerator_new(&e); |
f3a740a5 KS |
1121 | if (r < 0) |
1122 | return r; | |
1123 | ||
70068602 | 1124 | r = sd_device_enumerator_allow_uninitialized(e); |
f3a740a5 KS |
1125 | if (r < 0) |
1126 | return r; | |
1127 | ||
70068602 | 1128 | r = sd_device_enumerator_add_match_parent(e, dev); |
47a3fa0f TA |
1129 | if (r < 0) |
1130 | return r; | |
e9fc29f4 | 1131 | |
70068602 YW |
1132 | r = sd_device_enumerator_add_match_subsystem(e, "block", true); |
1133 | if (r < 0) | |
1134 | return r; | |
e9fc29f4 | 1135 | |
70068602 YW |
1136 | FOREACH_DEVICE(e, d) { |
1137 | const char *t; | |
e9fc29f4 | 1138 | |
70068602 YW |
1139 | if (sd_device_get_devtype(d, &t) < 0 || |
1140 | !streq("partition", t)) | |
e9fc29f4 KS |
1141 | continue; |
1142 | ||
1143 | has_partitions = true; | |
1144 | break; | |
1145 | } | |
1146 | ||
1147 | /* | |
1148 | * We have partitions and re-read the table, the kernel already sent | |
1149 | * out a "change" event for the disk, and "remove/add" for all | |
1150 | * partitions. | |
1151 | */ | |
1152 | if (part_table_read && has_partitions) | |
1153 | return 0; | |
1154 | ||
1155 | /* | |
1156 | * We have partitions but re-reading the partition table did not | |
1157 | * work, synthesize "change" for the disk and all partitions. | |
1158 | */ | |
70068602 YW |
1159 | log_debug("Device '%s' is closed, synthesising 'change'", devname); |
1160 | strscpyl(filename, sizeof(filename), syspath, "/uevent", NULL); | |
57512c89 | 1161 | write_string_file(filename, "change", WRITE_STRING_FILE_DISABLE_BUFFER); |
e9fc29f4 | 1162 | |
70068602 YW |
1163 | FOREACH_DEVICE(e, d) { |
1164 | const char *t, *n, *s; | |
f3a740a5 | 1165 | |
70068602 YW |
1166 | if (sd_device_get_devtype(d, &t) < 0 || |
1167 | !streq("partition", t)) | |
f3a740a5 KS |
1168 | continue; |
1169 | ||
70068602 YW |
1170 | if (sd_device_get_devname(d, &n) < 0 || |
1171 | sd_device_get_syspath(d, &s) < 0) | |
f3a740a5 KS |
1172 | continue; |
1173 | ||
70068602 YW |
1174 | log_debug("Device '%s' is closed, synthesising partition '%s' 'change'", devname, n); |
1175 | strscpyl(filename, sizeof(filename), s, "/uevent", NULL); | |
57512c89 | 1176 | write_string_file(filename, "change", WRITE_STRING_FILE_DISABLE_BUFFER); |
f3a740a5 | 1177 | } |
ede34445 KS |
1178 | |
1179 | return 0; | |
f3a740a5 KS |
1180 | } |
1181 | ||
70068602 YW |
1182 | log_debug("Device %s is closed, synthesising 'change'", devname); |
1183 | strscpyl(filename, sizeof(filename), syspath, "/uevent", NULL); | |
57512c89 | 1184 | write_string_file(filename, "change", WRITE_STRING_FILE_DISABLE_BUFFER); |
ede34445 | 1185 | |
f3a740a5 | 1186 | return 0; |
edd32000 KS |
1187 | } |
1188 | ||
e82e8fa5 | 1189 | static int on_inotify(sd_event_source *s, int fd, uint32_t revents, void *userdata) { |
c0c6806b | 1190 | Manager *manager = userdata; |
0254e944 | 1191 | union inotify_event_buffer buffer; |
f7c1ad4f LP |
1192 | struct inotify_event *e; |
1193 | ssize_t l; | |
0725c4b9 | 1194 | int r; |
912541b0 | 1195 | |
c0c6806b | 1196 | assert(manager); |
e82e8fa5 | 1197 | |
0725c4b9 YW |
1198 | r = event_source_disable(manager->kill_workers_event); |
1199 | if (r < 0) | |
1200 | log_warning_errno(r, "Failed to disable event source for cleaning up idle workers, ignoring: %m"); | |
eca195ec | 1201 | |
e82e8fa5 | 1202 | l = read(fd, &buffer, sizeof(buffer)); |
f7c1ad4f | 1203 | if (l < 0) { |
3742095b | 1204 | if (IN_SET(errno, EAGAIN, EINTR)) |
e82e8fa5 | 1205 | return 1; |
912541b0 | 1206 | |
f7c1ad4f | 1207 | return log_error_errno(errno, "Failed to read inotify fd: %m"); |
912541b0 KS |
1208 | } |
1209 | ||
f7c1ad4f | 1210 | FOREACH_INOTIFY_EVENT(e, buffer, l) { |
70068602 YW |
1211 | _cleanup_(sd_device_unrefp) sd_device *dev = NULL; |
1212 | const char *devnode; | |
1213 | ||
7fe3324c | 1214 | if (udev_watch_lookup(e->wd, &dev) <= 0) |
70068602 | 1215 | continue; |
912541b0 | 1216 | |
70068602 | 1217 | if (sd_device_get_devname(dev, &devnode) < 0) |
edd32000 | 1218 | continue; |
912541b0 | 1219 | |
7fe3324c | 1220 | log_device_debug(dev, "Inotify event: %x for %s", e->mask, devnode); |
da143134 | 1221 | if (e->mask & IN_CLOSE_WRITE) |
edd32000 | 1222 | synthesize_change(dev); |
da143134 | 1223 | else if (e->mask & IN_IGNORED) |
2024ed61 | 1224 | udev_watch_end(dev); |
912541b0 KS |
1225 | } |
1226 | ||
e82e8fa5 | 1227 | return 1; |
bd284db1 SJR |
1228 | } |
1229 | ||
0561329d | 1230 | static int on_sigterm(sd_event_source *s, const struct signalfd_siginfo *si, void *userdata) { |
c0c6806b TG |
1231 | Manager *manager = userdata; |
1232 | ||
1233 | assert(manager); | |
1234 | ||
62d43dac | 1235 | manager_exit(manager); |
912541b0 | 1236 | |
e82e8fa5 TG |
1237 | return 1; |
1238 | } | |
912541b0 | 1239 | |
0561329d | 1240 | static int on_sighup(sd_event_source *s, const struct signalfd_siginfo *si, void *userdata) { |
c0c6806b TG |
1241 | Manager *manager = userdata; |
1242 | ||
1243 | assert(manager); | |
1244 | ||
62d43dac | 1245 | manager_reload(manager); |
912541b0 | 1246 | |
e82e8fa5 TG |
1247 | return 1; |
1248 | } | |
912541b0 | 1249 | |
e82e8fa5 | 1250 | static int on_sigchld(sd_event_source *s, const struct signalfd_siginfo *si, void *userdata) { |
c0c6806b | 1251 | Manager *manager = userdata; |
0725c4b9 | 1252 | int r; |
c0c6806b TG |
1253 | |
1254 | assert(manager); | |
1255 | ||
e82e8fa5 TG |
1256 | for (;;) { |
1257 | pid_t pid; | |
1258 | int status; | |
1259 | struct worker *worker; | |
d1317d02 | 1260 | |
e82e8fa5 TG |
1261 | pid = waitpid(-1, &status, WNOHANG); |
1262 | if (pid <= 0) | |
f29328d6 | 1263 | break; |
e82e8fa5 | 1264 | |
4a0b58c4 | 1265 | worker = hashmap_get(manager->workers, PID_TO_PTR(pid)); |
e82e8fa5 | 1266 | if (!worker) { |
dc7faf2a | 1267 | log_warning("Worker ["PID_FMT"] is unknown, ignoring", pid); |
f29328d6 | 1268 | continue; |
912541b0 | 1269 | } |
e82e8fa5 TG |
1270 | |
1271 | if (WIFEXITED(status)) { | |
1272 | if (WEXITSTATUS(status) == 0) | |
dc7faf2a | 1273 | log_debug("Worker ["PID_FMT"] exited", pid); |
e82e8fa5 | 1274 | else |
dc7faf2a | 1275 | log_warning("Worker ["PID_FMT"] exited with return code %i", pid, WEXITSTATUS(status)); |
e82e8fa5 | 1276 | } else if (WIFSIGNALED(status)) { |
dc7faf2a | 1277 | log_warning("Worker ["PID_FMT"] terminated by signal %i (%s)", pid, WTERMSIG(status), signal_to_string(WTERMSIG(status))); |
e82e8fa5 | 1278 | } else if (WIFSTOPPED(status)) { |
dc7faf2a | 1279 | log_info("Worker ["PID_FMT"] stopped", pid); |
f29328d6 | 1280 | continue; |
e82e8fa5 | 1281 | } else if (WIFCONTINUED(status)) { |
dc7faf2a | 1282 | log_info("Worker ["PID_FMT"] continued", pid); |
f29328d6 | 1283 | continue; |
e82e8fa5 | 1284 | } else |
dc7faf2a | 1285 | log_warning("Worker ["PID_FMT"] exit with status 0x%04x", pid, status); |
e82e8fa5 | 1286 | |
05e6d9c6 | 1287 | if ((!WIFEXITED(status) || WEXITSTATUS(status) != 0) && worker->event) { |
dc7faf2a YW |
1288 | log_device_error(worker->event->dev->device, "Worker ["PID_FMT"] failed", pid); |
1289 | ||
05e6d9c6 YW |
1290 | /* delete state from disk */ |
1291 | udev_device_delete_db(worker->event->dev); | |
1292 | udev_device_tag_index(worker->event->dev, NULL, false); | |
dc7faf2a | 1293 | |
05e6d9c6 | 1294 | /* forward kernel event without amending it */ |
dc7faf2a YW |
1295 | r = device_monitor_send_device(manager->monitor, NULL, worker->event->dev_kernel->device); |
1296 | if (r < 0) | |
1297 | log_device_error_errno(worker->event->dev_kernel->device, r, "Failed to send back device to kernel: %m"); | |
e82e8fa5 TG |
1298 | } |
1299 | ||
1300 | worker_free(worker); | |
912541b0 | 1301 | } |
e82e8fa5 | 1302 | |
8302fe5a TG |
1303 | /* we can start new workers, try to schedule events */ |
1304 | event_queue_start(manager); | |
1305 | ||
eca195ec | 1306 | /* Disable unnecessary cleanup event */ |
0725c4b9 YW |
1307 | if (hashmap_isempty(manager->workers)) { |
1308 | r = event_source_disable(manager->kill_workers_event); | |
1309 | if (r < 0) | |
1310 | log_warning_errno(r, "Failed to disable event source for cleaning up idle workers, ignoring: %m"); | |
1311 | } | |
eca195ec | 1312 | |
e82e8fa5 | 1313 | return 1; |
f27125f9 | 1314 | } |
1315 | ||
693d371d TG |
1316 | static int on_post(sd_event_source *s, void *userdata) { |
1317 | Manager *manager = userdata; | |
693d371d TG |
1318 | |
1319 | assert(manager); | |
1320 | ||
b6107f01 YW |
1321 | if (!LIST_IS_EMPTY(manager->events)) |
1322 | return 1; | |
1323 | ||
1324 | /* There are no pending events. Let's cleanup idle process. */ | |
1325 | ||
1326 | if (!hashmap_isempty(manager->workers)) { | |
1327 | /* There are idle workers */ | |
6d63048a YW |
1328 | (void) event_reset_time(manager->event, &manager->kill_workers_event, CLOCK_MONOTONIC, |
1329 | now(CLOCK_MONOTONIC) + 3 * USEC_PER_SEC, USEC_PER_SEC, | |
1330 | on_kill_workers_event, manager, 0, "kill-workers-event", false); | |
b6107f01 | 1331 | return 1; |
693d371d TG |
1332 | } |
1333 | ||
b6107f01 YW |
1334 | /* There are no idle workers. */ |
1335 | ||
1336 | if (manager->exit) | |
1337 | return sd_event_exit(manager->event, 0); | |
1338 | ||
1339 | if (manager->cgroup) | |
1340 | /* cleanup possible left-over processes in our cgroup */ | |
1341 | (void) cg_kill(SYSTEMD_CGROUP_CONTROLLER, manager->cgroup, SIGKILL, CGROUP_IGNORE_SELF, NULL, NULL, NULL); | |
1342 | ||
693d371d TG |
1343 | return 1; |
1344 | } | |
1345 | ||
c4b69e99 | 1346 | static int listen_fds(int *ret_ctrl, int *ret_netlink) { |
fcff1e72 | 1347 | int ctrl_fd = -1, netlink_fd = -1; |
c4b69e99 | 1348 | int fd, n; |
912541b0 | 1349 | |
c4b69e99 YW |
1350 | assert(ret_ctrl); |
1351 | assert(ret_netlink); | |
fcff1e72 | 1352 | |
912541b0 | 1353 | n = sd_listen_fds(true); |
fcff1e72 TG |
1354 | if (n < 0) |
1355 | return n; | |
912541b0 KS |
1356 | |
1357 | for (fd = SD_LISTEN_FDS_START; fd < n + SD_LISTEN_FDS_START; fd++) { | |
c52cff07 | 1358 | if (sd_is_socket(fd, AF_LOCAL, SOCK_SEQPACKET, -1) > 0) { |
fcff1e72 TG |
1359 | if (ctrl_fd >= 0) |
1360 | return -EINVAL; | |
1361 | ctrl_fd = fd; | |
912541b0 KS |
1362 | continue; |
1363 | } | |
1364 | ||
c52cff07 | 1365 | if (sd_is_socket(fd, AF_NETLINK, SOCK_RAW, -1) > 0) { |
fcff1e72 TG |
1366 | if (netlink_fd >= 0) |
1367 | return -EINVAL; | |
1368 | netlink_fd = fd; | |
912541b0 KS |
1369 | continue; |
1370 | } | |
1371 | ||
fcff1e72 | 1372 | return -EINVAL; |
912541b0 KS |
1373 | } |
1374 | ||
c4b69e99 YW |
1375 | *ret_ctrl = ctrl_fd; |
1376 | *ret_netlink = netlink_fd; | |
912541b0 | 1377 | |
912541b0 | 1378 | return 0; |
7459bcdc KS |
1379 | } |
1380 | ||
e6f86cac | 1381 | /* |
3f85ef0f | 1382 | * read the kernel command line, in case we need to get into debug mode |
1d84ad94 LP |
1383 | * udev.log_priority=<level> syslog priority |
1384 | * udev.children_max=<number of workers> events are fully serialized if set to 1 | |
1385 | * udev.exec_delay=<number of seconds> delay execution of every executed program | |
1386 | * udev.event_timeout=<number of seconds> seconds to wait before terminating an event | |
e6f86cac | 1387 | */ |
96287a49 | 1388 | static int parse_proc_cmdline_item(const char *key, const char *value, void *data) { |
92e72467 | 1389 | int r = 0; |
e6f86cac | 1390 | |
614a823c | 1391 | assert(key); |
e6f86cac | 1392 | |
614a823c TG |
1393 | if (!value) |
1394 | return 0; | |
e6f86cac | 1395 | |
1d84ad94 LP |
1396 | if (proc_cmdline_key_streq(key, "udev.log_priority")) { |
1397 | ||
1398 | if (proc_cmdline_value_missing(key, value)) | |
1399 | return 0; | |
1400 | ||
46f0fbd8 | 1401 | r = log_level_from_string(value); |
92e72467 ZJS |
1402 | if (r >= 0) |
1403 | log_set_max_level(r); | |
1d84ad94 LP |
1404 | |
1405 | } else if (proc_cmdline_key_streq(key, "udev.event_timeout")) { | |
1406 | ||
1407 | if (proc_cmdline_value_missing(key, value)) | |
1408 | return 0; | |
1409 | ||
9d9264ba | 1410 | r = parse_sec(value, &arg_event_timeout_usec); |
1d84ad94 LP |
1411 | |
1412 | } else if (proc_cmdline_key_streq(key, "udev.children_max")) { | |
1413 | ||
1414 | if (proc_cmdline_value_missing(key, value)) | |
1415 | return 0; | |
1416 | ||
020328e1 | 1417 | r = safe_atou(value, &arg_children_max); |
1d84ad94 LP |
1418 | |
1419 | } else if (proc_cmdline_key_streq(key, "udev.exec_delay")) { | |
1420 | ||
1421 | if (proc_cmdline_value_missing(key, value)) | |
1422 | return 0; | |
1423 | ||
6b92f429 | 1424 | r = parse_sec(value, &arg_exec_delay_usec); |
1d84ad94 LP |
1425 | |
1426 | } else if (startswith(key, "udev.")) | |
92e72467 | 1427 | log_warning("Unknown udev kernel command line option \"%s\"", key); |
614a823c | 1428 | |
92e72467 ZJS |
1429 | if (r < 0) |
1430 | log_warning_errno(r, "Failed to parse \"%s=%s\", ignoring: %m", key, value); | |
1d84ad94 | 1431 | |
614a823c | 1432 | return 0; |
e6f86cac KS |
1433 | } |
1434 | ||
37ec0fdd LP |
1435 | static int help(void) { |
1436 | _cleanup_free_ char *link = NULL; | |
1437 | int r; | |
1438 | ||
1439 | r = terminal_urlify_man("systemd-udevd.service", "8", &link); | |
1440 | if (r < 0) | |
1441 | return log_oom(); | |
1442 | ||
ed216e1f TG |
1443 | printf("%s [OPTIONS...]\n\n" |
1444 | "Manages devices.\n\n" | |
5ac0162c | 1445 | " -h --help Print this message\n" |
2d19c17e MF |
1446 | " -V --version Print version of the program\n" |
1447 | " -d --daemon Detach and run in the background\n" | |
1448 | " -D --debug Enable debug output\n" | |
1449 | " -c --children-max=INT Set maximum number of workers\n" | |
1450 | " -e --exec-delay=SECONDS Seconds to wait before executing RUN=\n" | |
1451 | " -t --event-timeout=SECONDS Seconds to wait before terminating an event\n" | |
1452 | " -N --resolve-names=early|late|never\n" | |
5ac0162c | 1453 | " When to resolve users and groups\n" |
37ec0fdd LP |
1454 | "\nSee the %s for details.\n" |
1455 | , program_invocation_short_name | |
1456 | , link | |
1457 | ); | |
1458 | ||
1459 | return 0; | |
ed216e1f TG |
1460 | } |
1461 | ||
bba7a484 | 1462 | static int parse_argv(int argc, char *argv[]) { |
912541b0 | 1463 | static const struct option options[] = { |
bba7a484 TG |
1464 | { "daemon", no_argument, NULL, 'd' }, |
1465 | { "debug", no_argument, NULL, 'D' }, | |
1466 | { "children-max", required_argument, NULL, 'c' }, | |
1467 | { "exec-delay", required_argument, NULL, 'e' }, | |
1468 | { "event-timeout", required_argument, NULL, 't' }, | |
1469 | { "resolve-names", required_argument, NULL, 'N' }, | |
1470 | { "help", no_argument, NULL, 'h' }, | |
1471 | { "version", no_argument, NULL, 'V' }, | |
912541b0 KS |
1472 | {} |
1473 | }; | |
689a97f5 | 1474 | |
bba7a484 | 1475 | int c; |
689a97f5 | 1476 | |
bba7a484 TG |
1477 | assert(argc >= 0); |
1478 | assert(argv); | |
912541b0 | 1479 | |
e14b6f21 | 1480 | while ((c = getopt_long(argc, argv, "c:de:Dt:N:hV", options, NULL)) >= 0) { |
f1e8664e | 1481 | int r; |
912541b0 | 1482 | |
bba7a484 | 1483 | switch (c) { |
912541b0 | 1484 | |
912541b0 | 1485 | case 'd': |
bba7a484 | 1486 | arg_daemonize = true; |
912541b0 KS |
1487 | break; |
1488 | case 'c': | |
020328e1 | 1489 | r = safe_atou(optarg, &arg_children_max); |
6f5cf8a8 | 1490 | if (r < 0) |
389f9bf2 | 1491 | log_warning_errno(r, "Failed to parse --children-max= value '%s', ignoring: %m", optarg); |
912541b0 KS |
1492 | break; |
1493 | case 'e': | |
6b92f429 | 1494 | r = parse_sec(optarg, &arg_exec_delay_usec); |
6f5cf8a8 | 1495 | if (r < 0) |
6b92f429 | 1496 | log_warning_errno(r, "Failed to parse --exec-delay= value '%s', ignoring: %m", optarg); |
912541b0 | 1497 | break; |
9719859c | 1498 | case 't': |
9d9264ba | 1499 | r = parse_sec(optarg, &arg_event_timeout_usec); |
f1e8664e | 1500 | if (r < 0) |
9d9264ba | 1501 | log_warning_errno(r, "Failed to parse --event-timeout= value '%s', ignoring: %m", optarg); |
9719859c | 1502 | break; |
912541b0 | 1503 | case 'D': |
bba7a484 | 1504 | arg_debug = true; |
912541b0 | 1505 | break; |
c4d44cba YW |
1506 | case 'N': { |
1507 | ResolveNameTiming t; | |
1508 | ||
1509 | t = resolve_name_timing_from_string(optarg); | |
1510 | if (t < 0) | |
1511 | log_warning("Invalid --resolve-names= value '%s', ignoring.", optarg); | |
1512 | else | |
1513 | arg_resolve_name_timing = t; | |
912541b0 | 1514 | break; |
c4d44cba | 1515 | } |
912541b0 | 1516 | case 'h': |
37ec0fdd | 1517 | return help(); |
912541b0 | 1518 | case 'V': |
948aaa7c | 1519 | printf("%s\n", PACKAGE_VERSION); |
bba7a484 TG |
1520 | return 0; |
1521 | case '?': | |
1522 | return -EINVAL; | |
912541b0 | 1523 | default: |
bba7a484 TG |
1524 | assert_not_reached("Unhandled option"); |
1525 | ||
912541b0 KS |
1526 | } |
1527 | } | |
1528 | ||
bba7a484 TG |
1529 | return 1; |
1530 | } | |
1531 | ||
b7f74dd4 | 1532 | static int manager_new(Manager **ret, int fd_ctrl, int fd_uevent, const char *cgroup) { |
c0c6806b | 1533 | _cleanup_(manager_freep) Manager *manager = NULL; |
6d5e65f6 | 1534 | int r, fd_worker; |
c0c6806b TG |
1535 | |
1536 | assert(ret); | |
1537 | ||
6f19b42f | 1538 | manager = new(Manager, 1); |
c0c6806b TG |
1539 | if (!manager) |
1540 | return log_oom(); | |
1541 | ||
6f19b42f YW |
1542 | *manager = (Manager) { |
1543 | .fd_inotify = -1, | |
1544 | .worker_watch = { -1, -1 }, | |
1545 | .cgroup = cgroup, | |
1546 | }; | |
e237d8cb | 1547 | |
2024ed61 | 1548 | udev_builtin_init(); |
b2d21d93 | 1549 | |
c4d44cba | 1550 | manager->rules = udev_rules_new(arg_resolve_name_timing); |
ecb17862 TG |
1551 | if (!manager->rules) |
1552 | return log_error_errno(ENOMEM, "error reading rules"); | |
1553 | ||
2024ed61 | 1554 | manager->ctrl = udev_ctrl_new_from_fd(fd_ctrl); |
f59118ec TG |
1555 | if (!manager->ctrl) |
1556 | return log_error_errno(EINVAL, "error taking over udev control socket"); | |
e237d8cb | 1557 | |
c4b69e99 YW |
1558 | r = udev_ctrl_enable_receiving(manager->ctrl); |
1559 | if (r < 0) | |
1560 | return log_error_errno(r, "Failed to bind udev control socket: %m"); | |
1561 | ||
1562 | fd_ctrl = udev_ctrl_get_fd(manager->ctrl); | |
1563 | if (fd_ctrl < 0) | |
1564 | return log_error_errno(fd_ctrl, "Failed to get udev control fd: %m"); | |
1565 | ||
7f2e3a14 YW |
1566 | r = device_monitor_new_full(&manager->monitor, MONITOR_GROUP_KERNEL, fd_uevent); |
1567 | if (r < 0) | |
1568 | return log_error_errno(r, "Failed to initialize device monitor: %m"); | |
e237d8cb | 1569 | |
7f2e3a14 | 1570 | (void) sd_device_monitor_set_receive_buffer_size(manager->monitor, 128 * 1024 * 1024); |
c4b69e99 | 1571 | |
e237d8cb TG |
1572 | /* unnamed socket from workers to the main daemon */ |
1573 | r = socketpair(AF_LOCAL, SOCK_DGRAM|SOCK_CLOEXEC, 0, manager->worker_watch); | |
1574 | if (r < 0) | |
1575 | return log_error_errno(errno, "error creating socketpair: %m"); | |
1576 | ||
693d371d | 1577 | fd_worker = manager->worker_watch[READ_END]; |
e237d8cb | 1578 | |
2ff48e98 | 1579 | r = setsockopt_int(fd_worker, SOL_SOCKET, SO_PASSCRED, true); |
e237d8cb | 1580 | if (r < 0) |
2ff48e98 | 1581 | return log_error_errno(r, "could not enable SO_PASSCRED: %m"); |
e237d8cb | 1582 | |
b7759e04 YW |
1583 | r = udev_watch_init(); |
1584 | if (r < 0) | |
1585 | return log_error_errno(r, "Failed to create inotify descriptor: %m"); | |
1586 | manager->fd_inotify = r; | |
e237d8cb | 1587 | |
2024ed61 | 1588 | udev_watch_restore(); |
e237d8cb TG |
1589 | |
1590 | /* block and listen to all signals on signalfd */ | |
72c0a2c2 | 1591 | assert_se(sigprocmask_many(SIG_BLOCK, NULL, SIGTERM, SIGINT, SIGHUP, SIGCHLD, -1) >= 0); |
693d371d | 1592 | |
49f997f3 TG |
1593 | r = sd_event_default(&manager->event); |
1594 | if (r < 0) | |
709f6e46 | 1595 | return log_error_errno(r, "could not allocate event loop: %m"); |
49f997f3 | 1596 | |
693d371d TG |
1597 | r = sd_event_add_signal(manager->event, NULL, SIGINT, on_sigterm, manager); |
1598 | if (r < 0) | |
1599 | return log_error_errno(r, "error creating sigint event source: %m"); | |
1600 | ||
1601 | r = sd_event_add_signal(manager->event, NULL, SIGTERM, on_sigterm, manager); | |
1602 | if (r < 0) | |
1603 | return log_error_errno(r, "error creating sigterm event source: %m"); | |
1604 | ||
1605 | r = sd_event_add_signal(manager->event, NULL, SIGHUP, on_sighup, manager); | |
1606 | if (r < 0) | |
1607 | return log_error_errno(r, "error creating sighup event source: %m"); | |
1608 | ||
1609 | r = sd_event_add_signal(manager->event, NULL, SIGCHLD, on_sigchld, manager); | |
1610 | if (r < 0) | |
1611 | return log_error_errno(r, "error creating sigchld event source: %m"); | |
1612 | ||
1613 | r = sd_event_set_watchdog(manager->event, true); | |
1614 | if (r < 0) | |
1615 | return log_error_errno(r, "error creating watchdog event source: %m"); | |
1616 | ||
11b1dd8c | 1617 | r = sd_event_add_io(manager->event, &manager->ctrl_event, fd_ctrl, EPOLLIN, on_ctrl_msg, manager); |
693d371d TG |
1618 | if (r < 0) |
1619 | return log_error_errno(r, "error creating ctrl event source: %m"); | |
1620 | ||
1621 | /* This needs to be after the inotify and uevent handling, to make sure | |
1622 | * that the ping is send back after fully processing the pending uevents | |
1623 | * (including the synthetic ones we may create due to inotify events). | |
1624 | */ | |
1625 | r = sd_event_source_set_priority(manager->ctrl_event, SD_EVENT_PRIORITY_IDLE); | |
1626 | if (r < 0) | |
1627 | return log_error_errno(r, "cold not set IDLE event priority for ctrl event source: %m"); | |
1628 | ||
1629 | r = sd_event_add_io(manager->event, &manager->inotify_event, manager->fd_inotify, EPOLLIN, on_inotify, manager); | |
1630 | if (r < 0) | |
1631 | return log_error_errno(r, "error creating inotify event source: %m"); | |
1632 | ||
f00d2b6d YW |
1633 | r = sd_device_monitor_attach_event(manager->monitor, manager->event); |
1634 | if (r < 0) | |
1635 | return log_error_errno(r, "Failed to attach event to device monitor: %m"); | |
1636 | ||
1637 | r = sd_device_monitor_start(manager->monitor, on_uevent, manager); | |
693d371d | 1638 | if (r < 0) |
f00d2b6d YW |
1639 | return log_error_errno(r, "Failed to start device monitor: %m"); |
1640 | ||
1641 | (void) sd_event_source_set_description(sd_device_monitor_get_event_source(manager->monitor), "device-monitor"); | |
693d371d TG |
1642 | |
1643 | r = sd_event_add_io(manager->event, NULL, fd_worker, EPOLLIN, on_worker, manager); | |
1644 | if (r < 0) | |
1645 | return log_error_errno(r, "error creating worker event source: %m"); | |
1646 | ||
1647 | r = sd_event_add_post(manager->event, NULL, on_post, manager); | |
1648 | if (r < 0) | |
1649 | return log_error_errno(r, "error creating post event source: %m"); | |
e237d8cb | 1650 | |
1cc6c93a | 1651 | *ret = TAKE_PTR(manager); |
11b1dd8c | 1652 | |
86c3bece | 1653 | return 0; |
c0c6806b TG |
1654 | } |
1655 | ||
077fc5e2 | 1656 | static int run(int fd_ctrl, int fd_uevent, const char *cgroup) { |
c0c6806b | 1657 | _cleanup_(manager_freep) Manager *manager = NULL; |
077fc5e2 DH |
1658 | int r; |
1659 | ||
1660 | r = manager_new(&manager, fd_ctrl, fd_uevent, cgroup); | |
1661 | if (r < 0) { | |
1662 | r = log_error_errno(r, "failed to allocate manager object: %m"); | |
1663 | goto exit; | |
1664 | } | |
1665 | ||
1666 | r = udev_rules_apply_static_dev_perms(manager->rules); | |
1667 | if (r < 0) | |
1668 | log_error_errno(r, "failed to apply permissions on static device nodes: %m"); | |
1669 | ||
1ef72b55 MS |
1670 | (void) sd_notifyf(false, |
1671 | "READY=1\n" | |
1672 | "STATUS=Processing with %u children at max", arg_children_max); | |
077fc5e2 DH |
1673 | |
1674 | r = sd_event_loop(manager->event); | |
1675 | if (r < 0) { | |
1676 | log_error_errno(r, "event loop failed: %m"); | |
1677 | goto exit; | |
1678 | } | |
1679 | ||
1680 | sd_event_get_exit_code(manager->event, &r); | |
1681 | ||
1682 | exit: | |
1683 | sd_notify(false, | |
1684 | "STOPPING=1\n" | |
1685 | "STATUS=Shutting down..."); | |
1686 | if (manager) | |
1687 | udev_ctrl_cleanup(manager->ctrl); | |
1688 | return r; | |
1689 | } | |
1690 | ||
1691 | int main(int argc, char *argv[]) { | |
c26d1879 | 1692 | _cleanup_free_ char *cgroup = NULL; |
efa1606e | 1693 | int fd_ctrl = -1, fd_uevent = -1; |
e5d7bce1 | 1694 | int r; |
bba7a484 | 1695 | |
bba7a484 | 1696 | log_set_target(LOG_TARGET_AUTO); |
a14e7af1 | 1697 | udev_parse_config_full(&arg_children_max, &arg_exec_delay_usec, &arg_event_timeout_usec, &arg_resolve_name_timing); |
bba7a484 TG |
1698 | log_parse_environment(); |
1699 | log_open(); | |
1700 | ||
bba7a484 TG |
1701 | r = parse_argv(argc, argv); |
1702 | if (r <= 0) | |
1703 | goto exit; | |
1704 | ||
1d84ad94 | 1705 | r = proc_cmdline_parse(parse_proc_cmdline_item, NULL, PROC_CMDLINE_STRIP_RD_PREFIX); |
614a823c TG |
1706 | if (r < 0) |
1707 | log_warning_errno(r, "failed to parse kernel command line, ignoring: %m"); | |
912541b0 | 1708 | |
78d3e041 KS |
1709 | if (arg_debug) { |
1710 | log_set_target(LOG_TARGET_CONSOLE); | |
bba7a484 | 1711 | log_set_max_level(LOG_DEBUG); |
78d3e041 | 1712 | } |
bba7a484 | 1713 | |
6174a243 YW |
1714 | log_set_max_level_realm(LOG_REALM_SYSTEMD, log_get_max_level()); |
1715 | ||
fba868fa LP |
1716 | r = must_be_root(); |
1717 | if (r < 0) | |
912541b0 | 1718 | goto exit; |
912541b0 | 1719 | |
712cebf1 TG |
1720 | if (arg_children_max == 0) { |
1721 | cpu_set_t cpu_set; | |
e438c57a | 1722 | unsigned long mem_limit; |
ebc164ef | 1723 | |
712cebf1 | 1724 | arg_children_max = 8; |
d457ff83 | 1725 | |
ece174c5 | 1726 | if (sched_getaffinity(0, sizeof(cpu_set), &cpu_set) == 0) |
faae64fa | 1727 | arg_children_max += CPU_COUNT(&cpu_set) * 8; |
912541b0 | 1728 | |
e438c57a MW |
1729 | mem_limit = physical_memory() / (128LU*1024*1024); |
1730 | arg_children_max = MAX(10U, MIN(arg_children_max, mem_limit)); | |
1731 | ||
712cebf1 | 1732 | log_debug("set children_max to %u", arg_children_max); |
d457ff83 | 1733 | } |
912541b0 | 1734 | |
712cebf1 TG |
1735 | /* set umask before creating any file/directory */ |
1736 | r = chdir("/"); | |
1737 | if (r < 0) { | |
1738 | r = log_error_errno(errno, "could not change dir to /: %m"); | |
1739 | goto exit; | |
1740 | } | |
194bbe33 | 1741 | |
712cebf1 | 1742 | umask(022); |
912541b0 | 1743 | |
c3dacc8b | 1744 | r = mac_selinux_init(); |
712cebf1 TG |
1745 | if (r < 0) { |
1746 | log_error_errno(r, "could not initialize labelling: %m"); | |
1747 | goto exit; | |
912541b0 KS |
1748 | } |
1749 | ||
dae8b82e ZJS |
1750 | r = mkdir_errno_wrapper("/run/udev", 0755); |
1751 | if (r < 0 && r != -EEXIST) { | |
1752 | log_error_errno(r, "could not create /run/udev: %m"); | |
712cebf1 TG |
1753 | goto exit; |
1754 | } | |
1755 | ||
03cfe0d5 | 1756 | dev_setup(NULL, UID_INVALID, GID_INVALID); |
912541b0 | 1757 | |
c26d1879 TG |
1758 | if (getppid() == 1) { |
1759 | /* get our own cgroup, we regularly kill everything udev has left behind | |
1760 | we only do this on systemd systems, and only if we are directly spawned | |
1761 | by PID1. otherwise we are not guaranteed to have a dedicated cgroup */ | |
1762 | r = cg_pid_get_path(SYSTEMD_CGROUP_CONTROLLER, 0, &cgroup); | |
11b9fb15 | 1763 | if (r < 0) { |
a2d61f07 | 1764 | if (IN_SET(r, -ENOENT, -ENOMEDIUM)) |
11b9fb15 TG |
1765 | log_debug_errno(r, "did not find dedicated cgroup: %m"); |
1766 | else | |
1767 | log_warning_errno(r, "failed to get cgroup: %m"); | |
1768 | } | |
c26d1879 TG |
1769 | } |
1770 | ||
b7f74dd4 TG |
1771 | r = listen_fds(&fd_ctrl, &fd_uevent); |
1772 | if (r < 0) { | |
1773 | r = log_error_errno(r, "could not listen on fds: %m"); | |
1774 | goto exit; | |
1775 | } | |
1776 | ||
bba7a484 | 1777 | if (arg_daemonize) { |
912541b0 | 1778 | pid_t pid; |
912541b0 | 1779 | |
948aaa7c | 1780 | log_info("starting version " PACKAGE_VERSION); |
3cbb2057 | 1781 | |
40e749b5 | 1782 | /* connect /dev/null to stdin, stdout, stderr */ |
c76cf844 AK |
1783 | if (log_get_max_level() < LOG_DEBUG) { |
1784 | r = make_null_stdio(); | |
1785 | if (r < 0) | |
1786 | log_warning_errno(r, "Failed to redirect standard streams to /dev/null: %m"); | |
1787 | } | |
1788 | ||
912541b0 KS |
1789 | pid = fork(); |
1790 | switch (pid) { | |
1791 | case 0: | |
1792 | break; | |
1793 | case -1: | |
6af5e6a4 | 1794 | r = log_error_errno(errno, "fork of daemon failed: %m"); |
912541b0 KS |
1795 | goto exit; |
1796 | default: | |
f53d1fcd TG |
1797 | mac_selinux_finish(); |
1798 | log_close(); | |
1799 | _exit(EXIT_SUCCESS); | |
912541b0 KS |
1800 | } |
1801 | ||
1802 | setsid(); | |
1803 | ||
76cdddfb YW |
1804 | r = set_oom_score_adjust(-1000); |
1805 | if (r < 0) | |
1806 | log_debug_errno(r, "Failed to adjust OOM score, ignoring: %m"); | |
7500cd5e | 1807 | } |
912541b0 | 1808 | |
077fc5e2 | 1809 | r = run(fd_ctrl, fd_uevent, cgroup); |
693d371d | 1810 | |
53921bfa | 1811 | exit: |
cc56fafe | 1812 | mac_selinux_finish(); |
baa30fbc | 1813 | log_close(); |
6af5e6a4 | 1814 | return r < 0 ? EXIT_FAILURE : EXIT_SUCCESS; |
7fafc032 | 1815 | } |