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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 | |
7f2e3a14 YW |
443 | static int worker_main(Manager *_manager, sd_device_monitor *monitor, sd_device *first_device) { |
444 | _cleanup_(sd_device_unrefp) sd_device *dev = first_device; | |
0bed242c YW |
445 | _cleanup_(manager_freep) Manager *manager = _manager; |
446 | _cleanup_close_ int fd_signal = -1, fd_ep = -1; | |
447 | struct epoll_event ep_signal = { .events = EPOLLIN }; | |
448 | struct epoll_event ep_monitor = { .events = EPOLLIN }; | |
449 | int fd_monitor, r; | |
450 | sigset_t mask; | |
145dae7e | 451 | |
0bed242c YW |
452 | assert(manager); |
453 | assert(monitor); | |
454 | assert(dev); | |
912541b0 | 455 | |
0bed242c | 456 | unsetenv("NOTIFY_SOCKET"); |
3b64e4d4 | 457 | |
0bed242c YW |
458 | /* Clear unnecessary data form worker in Manager object.*/ |
459 | manager_clear_for_worker(manager); | |
912541b0 | 460 | |
0bed242c YW |
461 | sigfillset(&mask); |
462 | fd_signal = signalfd(-1, &mask, SFD_NONBLOCK|SFD_CLOEXEC); | |
463 | if (fd_signal < 0) | |
464 | return log_error_errno(errno, "error creating signalfd %m"); | |
465 | ep_signal.data.fd = fd_signal; | |
3ebdb81e | 466 | |
7f2e3a14 | 467 | fd_monitor = device_monitor_get_fd(monitor); |
0bed242c | 468 | ep_monitor.data.fd = fd_monitor; |
912541b0 | 469 | |
0bed242c YW |
470 | fd_ep = epoll_create1(EPOLL_CLOEXEC); |
471 | if (fd_ep < 0) | |
472 | return log_error_errno(errno, "error creating epoll fd: %m"); | |
4c83d994 | 473 | |
0bed242c YW |
474 | if (epoll_ctl(fd_ep, EPOLL_CTL_ADD, fd_signal, &ep_signal) < 0 || |
475 | epoll_ctl(fd_ep, EPOLL_CTL_ADD, fd_monitor, &ep_monitor) < 0) | |
476 | return log_error_errno(errno, "fail to add fds to epoll: %m"); | |
912541b0 | 477 | |
0bed242c YW |
478 | /* Reset OOM score, we only protect the main daemon. */ |
479 | r = set_oom_score_adjust(0); | |
480 | if (r < 0) | |
481 | log_debug_errno(r, "Failed to reset OOM score, ignoring: %m"); | |
912541b0 | 482 | |
0bed242c | 483 | for (;;) { |
7f2e3a14 | 484 | r = worker_process_device(manager, dev); |
0bed242c | 485 | if (r < 0) |
7f2e3a14 | 486 | log_device_warning_errno(dev, r, "Failed to process device, ignoring: %m"); |
b66f29a1 | 487 | |
0bed242c | 488 | /* send processed event back to libudev listeners */ |
7f2e3a14 | 489 | r = device_monitor_send_device(monitor, NULL, dev); |
0bed242c | 490 | if (r < 0) |
7f2e3a14 | 491 | log_device_warning_errno(dev, r, "Failed to send device to udev event listeners, ignoring: %m"); |
912541b0 | 492 | |
0bed242c YW |
493 | /* send udevd the result of the event execution */ |
494 | r = worker_send_message(manager->worker_watch[WRITE_END]); | |
495 | if (r < 0) | |
7f2e3a14 | 496 | log_device_warning_errno(dev, r, "Failed to send result to main daemon: %m"); |
0bed242c | 497 | |
7f2e3a14 | 498 | dev = sd_device_unref(dev); |
0bed242c YW |
499 | |
500 | /* wait for more device messages from main udevd, or term signal */ | |
501 | while (!dev) { | |
502 | struct epoll_event ev[4]; | |
503 | int fdcount; | |
504 | int i; | |
505 | ||
506 | fdcount = epoll_wait(fd_ep, ev, ELEMENTSOF(ev), -1); | |
507 | if (fdcount < 0) { | |
508 | if (errno == EINTR) | |
509 | continue; | |
510 | return log_error_errno(errno, "failed to poll: %m"); | |
511 | } | |
912541b0 | 512 | |
0bed242c YW |
513 | for (i = 0; i < fdcount; i++) { |
514 | if (ev[i].data.fd == fd_monitor && ev[i].events & EPOLLIN) { | |
7f2e3a14 | 515 | (void) device_monitor_receive_device(monitor, &dev); |
0bed242c YW |
516 | break; |
517 | } else if (ev[i].data.fd == fd_signal && ev[i].events & EPOLLIN) { | |
518 | struct signalfd_siginfo fdsi; | |
519 | ssize_t size; | |
912541b0 | 520 | |
0bed242c YW |
521 | size = read(fd_signal, &fdsi, sizeof(struct signalfd_siginfo)); |
522 | if (size != sizeof(struct signalfd_siginfo)) | |
912541b0 | 523 | continue; |
0bed242c YW |
524 | switch (fdsi.ssi_signo) { |
525 | case SIGTERM: | |
526 | return 0; | |
912541b0 KS |
527 | } |
528 | } | |
529 | } | |
530 | } | |
0bed242c YW |
531 | } |
532 | } | |
533 | ||
7443654e | 534 | static int worker_spawn(Manager *manager, struct event *event) { |
7f2e3a14 | 535 | _cleanup_(sd_device_monitor_unrefp) sd_device_monitor *worker_monitor = NULL; |
7443654e | 536 | struct worker *worker; |
0bed242c | 537 | pid_t pid; |
7443654e | 538 | int r; |
0bed242c YW |
539 | |
540 | /* listen for new events */ | |
7f2e3a14 YW |
541 | r = device_monitor_new_full(&worker_monitor, MONITOR_GROUP_NONE, -1); |
542 | if (r < 0) | |
543 | return r; | |
7443654e | 544 | |
0bed242c | 545 | /* allow the main daemon netlink address to send devices to the worker */ |
7f2e3a14 YW |
546 | r = device_monitor_allow_unicast_sender(worker_monitor, manager->monitor); |
547 | if (r < 0) | |
548 | return log_error_errno(r, "Worker: Failed to set unicast sender: %m"); | |
549 | ||
550 | r = device_monitor_enable_receiving(worker_monitor); | |
0bed242c | 551 | if (r < 0) |
7f2e3a14 | 552 | return log_error_errno(r, "Worker: Failed to enable receiving of device: %m"); |
0bed242c | 553 | |
7443654e YW |
554 | r = safe_fork(NULL, FORK_DEATHSIG, &pid); |
555 | if (r < 0) { | |
556 | event->state = EVENT_QUEUED; | |
557 | return log_error_errno(r, "Failed to fork() worker: %m"); | |
558 | } | |
559 | if (r == 0) { | |
560 | /* Worker process */ | |
7f2e3a14 | 561 | r = worker_main(manager, worker_monitor, sd_device_ref(event->dev->device)); |
baa30fbc | 562 | log_close(); |
8b46c3fc | 563 | _exit(r < 0 ? EXIT_FAILURE : EXIT_SUCCESS); |
912541b0 | 564 | } |
e03c7cc2 | 565 | |
7443654e YW |
566 | r = worker_new(&worker, manager, worker_monitor, pid); |
567 | if (r < 0) | |
568 | return log_error_errno(r, "Failed to create worker object: %m"); | |
e03c7cc2 | 569 | |
7443654e | 570 | worker_attach_event(worker, event); |
39c19cf1 | 571 | |
7443654e YW |
572 | log_device_debug(event->dev->device, "seq %llu forked new worker ["PID_FMT"]", event->seqnum, pid); |
573 | return 0; | |
7fafc032 KS |
574 | } |
575 | ||
c0c6806b | 576 | static void event_run(Manager *manager, struct event *event) { |
a505965d TG |
577 | struct worker *worker; |
578 | Iterator i; | |
7f2e3a14 | 579 | int r; |
912541b0 | 580 | |
c0c6806b TG |
581 | assert(manager); |
582 | assert(event); | |
583 | ||
584 | HASHMAP_FOREACH(worker, manager->workers, i) { | |
912541b0 KS |
585 | if (worker->state != WORKER_IDLE) |
586 | continue; | |
587 | ||
7f2e3a14 YW |
588 | r = device_monitor_send_device(manager->monitor, worker->monitor, event->dev->device); |
589 | if (r < 0) { | |
590 | log_device_error_errno(event->dev->device, r, "Worker ["PID_FMT"] did not accept message, killing the worker: %m", | |
591 | worker->pid); | |
cb542e84 | 592 | (void) kill(worker->pid, SIGKILL); |
912541b0 KS |
593 | worker->state = WORKER_KILLED; |
594 | continue; | |
595 | } | |
39c19cf1 | 596 | worker_attach_event(worker, event); |
912541b0 KS |
597 | return; |
598 | } | |
599 | ||
c0c6806b | 600 | if (hashmap_size(manager->workers) >= arg_children_max) { |
bba7a484 | 601 | if (arg_children_max > 1) |
c0c6806b | 602 | log_debug("maximum number (%i) of children reached", hashmap_size(manager->workers)); |
912541b0 KS |
603 | return; |
604 | } | |
605 | ||
606 | /* start new worker and pass initial device */ | |
c0c6806b | 607 | worker_spawn(manager, event); |
1e03b754 KS |
608 | } |
609 | ||
ecb17862 | 610 | static int event_queue_insert(Manager *manager, struct udev_device *dev) { |
912541b0 | 611 | struct event *event; |
cb49a4f2 | 612 | int r; |
912541b0 | 613 | |
ecb17862 TG |
614 | assert(manager); |
615 | assert(dev); | |
616 | ||
040e6896 TG |
617 | /* only one process can add events to the queue */ |
618 | if (manager->pid == 0) | |
df0ff127 | 619 | manager->pid = getpid_cached(); |
040e6896 | 620 | |
df0ff127 | 621 | assert(manager->pid == getpid_cached()); |
cb49a4f2 | 622 | |
955d98c9 | 623 | event = new0(struct event, 1); |
cb49a4f2 TG |
624 | if (!event) |
625 | return -ENOMEM; | |
912541b0 | 626 | |
cb49a4f2 | 627 | event->manager = manager; |
912541b0 | 628 | event->dev = dev; |
6969c349 TG |
629 | event->dev_kernel = udev_device_shallow_clone(dev); |
630 | udev_device_copy_properties(event->dev_kernel, dev); | |
912541b0 KS |
631 | event->seqnum = udev_device_get_seqnum(dev); |
632 | event->devpath = udev_device_get_devpath(dev); | |
633 | event->devpath_len = strlen(event->devpath); | |
634 | event->devpath_old = udev_device_get_devpath_old(dev); | |
635 | event->devnum = udev_device_get_devnum(dev); | |
ea6039a3 | 636 | event->is_block = streq("block", udev_device_get_subsystem(dev)); |
912541b0 KS |
637 | event->ifindex = udev_device_get_ifindex(dev); |
638 | ||
9f6445e3 | 639 | log_debug("seq %llu queued, '%s' '%s'", udev_device_get_seqnum(dev), |
912541b0 KS |
640 | udev_device_get_action(dev), udev_device_get_subsystem(dev)); |
641 | ||
642 | event->state = EVENT_QUEUED; | |
cb49a4f2 | 643 | |
40a57716 | 644 | if (LIST_IS_EMPTY(manager->events)) { |
cb49a4f2 TG |
645 | r = touch("/run/udev/queue"); |
646 | if (r < 0) | |
647 | log_warning_errno(r, "could not touch /run/udev/queue: %m"); | |
648 | } | |
649 | ||
40a57716 | 650 | LIST_APPEND(event, manager->events, event); |
cb49a4f2 | 651 | |
912541b0 | 652 | return 0; |
fc465079 KS |
653 | } |
654 | ||
c0c6806b | 655 | static void manager_kill_workers(Manager *manager) { |
a505965d TG |
656 | struct worker *worker; |
657 | Iterator i; | |
1e03b754 | 658 | |
c0c6806b TG |
659 | assert(manager); |
660 | ||
661 | HASHMAP_FOREACH(worker, manager->workers, i) { | |
912541b0 KS |
662 | if (worker->state == WORKER_KILLED) |
663 | continue; | |
1e03b754 | 664 | |
912541b0 | 665 | worker->state = WORKER_KILLED; |
cb542e84 | 666 | (void) kill(worker->pid, SIGTERM); |
912541b0 | 667 | } |
1e03b754 KS |
668 | } |
669 | ||
e3196993 | 670 | /* lookup event for identical, parent, child device */ |
ecb17862 | 671 | static bool is_devpath_busy(Manager *manager, struct event *event) { |
40a57716 | 672 | struct event *loop_event; |
912541b0 KS |
673 | size_t common; |
674 | ||
675 | /* check if queue contains events we depend on */ | |
40a57716 | 676 | LIST_FOREACH(event, loop_event, manager->events) { |
87ac8d99 | 677 | /* we already found a later event, earlier cannot block us, no need to check again */ |
912541b0 KS |
678 | if (loop_event->seqnum < event->delaying_seqnum) |
679 | continue; | |
680 | ||
681 | /* event we checked earlier still exists, no need to check again */ | |
682 | if (loop_event->seqnum == event->delaying_seqnum) | |
683 | return true; | |
684 | ||
685 | /* found ourself, no later event can block us */ | |
686 | if (loop_event->seqnum >= event->seqnum) | |
687 | break; | |
688 | ||
689 | /* check major/minor */ | |
690 | if (major(event->devnum) != 0 && event->devnum == loop_event->devnum && event->is_block == loop_event->is_block) | |
691 | return true; | |
692 | ||
693 | /* check network device ifindex */ | |
edc81c1c | 694 | if (event->ifindex > 0 && event->ifindex == loop_event->ifindex) |
912541b0 KS |
695 | return true; |
696 | ||
697 | /* check our old name */ | |
edc81c1c | 698 | if (event->devpath_old && streq(loop_event->devpath, event->devpath_old)) { |
912541b0 KS |
699 | event->delaying_seqnum = loop_event->seqnum; |
700 | return true; | |
701 | } | |
702 | ||
703 | /* compare devpath */ | |
704 | common = MIN(loop_event->devpath_len, event->devpath_len); | |
705 | ||
706 | /* one devpath is contained in the other? */ | |
707 | if (memcmp(loop_event->devpath, event->devpath, common) != 0) | |
708 | continue; | |
709 | ||
710 | /* identical device event found */ | |
711 | if (loop_event->devpath_len == event->devpath_len) { | |
712 | /* devices names might have changed/swapped in the meantime */ | |
edc81c1c | 713 | if (major(event->devnum) != 0 || event->ifindex > 0) |
912541b0 KS |
714 | continue; |
715 | event->delaying_seqnum = loop_event->seqnum; | |
716 | return true; | |
717 | } | |
718 | ||
719 | /* parent device event found */ | |
720 | if (event->devpath[common] == '/') { | |
721 | event->delaying_seqnum = loop_event->seqnum; | |
722 | return true; | |
723 | } | |
724 | ||
725 | /* child device event found */ | |
726 | if (loop_event->devpath[common] == '/') { | |
727 | event->delaying_seqnum = loop_event->seqnum; | |
728 | return true; | |
729 | } | |
912541b0 KS |
730 | } |
731 | ||
732 | return false; | |
7fafc032 KS |
733 | } |
734 | ||
693d371d TG |
735 | static int on_exit_timeout(sd_event_source *s, uint64_t usec, void *userdata) { |
736 | Manager *manager = userdata; | |
737 | ||
738 | assert(manager); | |
739 | ||
740 | log_error_errno(ETIMEDOUT, "giving up waiting for workers to finish"); | |
741 | ||
742 | sd_event_exit(manager->event, -ETIMEDOUT); | |
743 | ||
744 | return 1; | |
745 | } | |
746 | ||
62d43dac | 747 | static void manager_exit(Manager *manager) { |
693d371d TG |
748 | uint64_t usec; |
749 | int r; | |
62d43dac TG |
750 | |
751 | assert(manager); | |
752 | ||
753 | manager->exit = true; | |
754 | ||
b79aacbf TG |
755 | sd_notify(false, |
756 | "STOPPING=1\n" | |
757 | "STATUS=Starting shutdown..."); | |
758 | ||
62d43dac | 759 | /* close sources of new events and discard buffered events */ |
693d371d | 760 | manager->ctrl_event = sd_event_source_unref(manager->ctrl_event); |
ab7854df | 761 | manager->ctrl = udev_ctrl_unref(manager->ctrl); |
62d43dac | 762 | |
693d371d | 763 | manager->inotify_event = sd_event_source_unref(manager->inotify_event); |
ab7854df | 764 | manager->fd_inotify = safe_close(manager->fd_inotify); |
62d43dac | 765 | |
693d371d | 766 | manager->uevent_event = sd_event_source_unref(manager->uevent_event); |
7f2e3a14 | 767 | manager->monitor = sd_device_monitor_unref(manager->monitor); |
62d43dac TG |
768 | |
769 | /* discard queued events and kill workers */ | |
770 | event_queue_cleanup(manager, EVENT_QUEUED); | |
771 | manager_kill_workers(manager); | |
693d371d | 772 | |
3285baa8 | 773 | assert_se(sd_event_now(manager->event, CLOCK_MONOTONIC, &usec) >= 0); |
693d371d | 774 | |
3285baa8 | 775 | r = sd_event_add_time(manager->event, NULL, CLOCK_MONOTONIC, |
693d371d TG |
776 | usec + 30 * USEC_PER_SEC, USEC_PER_SEC, on_exit_timeout, manager); |
777 | if (r < 0) | |
778 | return; | |
62d43dac TG |
779 | } |
780 | ||
781 | /* reload requested, HUP signal received, rules changed, builtin changed */ | |
782 | static void manager_reload(Manager *manager) { | |
783 | ||
784 | assert(manager); | |
785 | ||
b79aacbf TG |
786 | sd_notify(false, |
787 | "RELOADING=1\n" | |
788 | "STATUS=Flushing configuration..."); | |
789 | ||
62d43dac TG |
790 | manager_kill_workers(manager); |
791 | manager->rules = udev_rules_unref(manager->rules); | |
2024ed61 | 792 | udev_builtin_exit(); |
b79aacbf | 793 | |
1ef72b55 MS |
794 | sd_notifyf(false, |
795 | "READY=1\n" | |
796 | "STATUS=Processing with %u children at max", arg_children_max); | |
62d43dac TG |
797 | } |
798 | ||
eca195ec YW |
799 | static int on_kill_workers_event(sd_event_source *s, uint64_t usec, void *userdata) { |
800 | Manager *manager = userdata; | |
801 | ||
802 | assert(manager); | |
803 | ||
804 | log_debug("Cleanup idle workers"); | |
805 | manager_kill_workers(manager); | |
806 | ||
807 | return 1; | |
808 | } | |
809 | ||
c0c6806b | 810 | static void event_queue_start(Manager *manager) { |
40a57716 | 811 | struct event *event; |
693d371d | 812 | usec_t usec; |
0725c4b9 | 813 | int r; |
8ab44e3f | 814 | |
c0c6806b TG |
815 | assert(manager); |
816 | ||
40a57716 | 817 | if (LIST_IS_EMPTY(manager->events) || |
7c4c7e89 TG |
818 | manager->exit || manager->stop_exec_queue) |
819 | return; | |
820 | ||
3285baa8 | 821 | assert_se(sd_event_now(manager->event, CLOCK_MONOTONIC, &usec) >= 0); |
38a03f06 LP |
822 | /* check for changed config, every 3 seconds at most */ |
823 | if (manager->last_usec == 0 || | |
824 | (usec - manager->last_usec) > 3 * USEC_PER_SEC) { | |
825 | if (udev_rules_check_timestamp(manager->rules) || | |
2024ed61 | 826 | udev_builtin_validate()) |
38a03f06 | 827 | manager_reload(manager); |
693d371d | 828 | |
38a03f06 | 829 | manager->last_usec = usec; |
7c4c7e89 TG |
830 | } |
831 | ||
0725c4b9 YW |
832 | r = event_source_disable(manager->kill_workers_event); |
833 | if (r < 0) | |
834 | log_warning_errno(r, "Failed to disable event source for cleaning up idle workers, ignoring: %m"); | |
eca195ec | 835 | |
2024ed61 | 836 | udev_builtin_init(); |
7c4c7e89 TG |
837 | |
838 | if (!manager->rules) { | |
c4d44cba | 839 | manager->rules = udev_rules_new(arg_resolve_name_timing); |
7c4c7e89 TG |
840 | if (!manager->rules) |
841 | return; | |
842 | } | |
843 | ||
40a57716 | 844 | LIST_FOREACH(event,event,manager->events) { |
912541b0 KS |
845 | if (event->state != EVENT_QUEUED) |
846 | continue; | |
0bc74ea7 | 847 | |
912541b0 | 848 | /* do not start event if parent or child event is still running */ |
ecb17862 | 849 | if (is_devpath_busy(manager, event)) |
912541b0 | 850 | continue; |
fc465079 | 851 | |
c0c6806b | 852 | event_run(manager, event); |
912541b0 | 853 | } |
1e03b754 KS |
854 | } |
855 | ||
ecb17862 | 856 | static void event_queue_cleanup(Manager *manager, enum event_state match_type) { |
40a57716 | 857 | struct event *event, *tmp; |
ff2c503d | 858 | |
40a57716 | 859 | LIST_FOREACH_SAFE(event, event, tmp, manager->events) { |
912541b0 KS |
860 | if (match_type != EVENT_UNDEF && match_type != event->state) |
861 | continue; | |
ff2c503d | 862 | |
c6aa11f2 | 863 | event_free(event); |
912541b0 | 864 | } |
ff2c503d KS |
865 | } |
866 | ||
e82e8fa5 | 867 | static int on_worker(sd_event_source *s, int fd, uint32_t revents, void *userdata) { |
c0c6806b TG |
868 | Manager *manager = userdata; |
869 | ||
870 | assert(manager); | |
871 | ||
912541b0 KS |
872 | for (;;) { |
873 | struct worker_message msg; | |
979558f3 TG |
874 | struct iovec iovec = { |
875 | .iov_base = &msg, | |
876 | .iov_len = sizeof(msg), | |
877 | }; | |
878 | union { | |
879 | struct cmsghdr cmsghdr; | |
880 | uint8_t buf[CMSG_SPACE(sizeof(struct ucred))]; | |
881 | } control = {}; | |
882 | struct msghdr msghdr = { | |
883 | .msg_iov = &iovec, | |
884 | .msg_iovlen = 1, | |
885 | .msg_control = &control, | |
886 | .msg_controllen = sizeof(control), | |
887 | }; | |
888 | struct cmsghdr *cmsg; | |
912541b0 | 889 | ssize_t size; |
979558f3 | 890 | struct ucred *ucred = NULL; |
a505965d | 891 | struct worker *worker; |
912541b0 | 892 | |
e82e8fa5 | 893 | size = recvmsg(fd, &msghdr, MSG_DONTWAIT); |
979558f3 | 894 | if (size < 0) { |
738a7907 TG |
895 | if (errno == EINTR) |
896 | continue; | |
897 | else if (errno == EAGAIN) | |
898 | /* nothing more to read */ | |
899 | break; | |
979558f3 | 900 | |
e82e8fa5 | 901 | return log_error_errno(errno, "failed to receive message: %m"); |
979558f3 TG |
902 | } else if (size != sizeof(struct worker_message)) { |
903 | log_warning_errno(EIO, "ignoring worker message with invalid size %zi bytes", size); | |
e82e8fa5 | 904 | continue; |
979558f3 TG |
905 | } |
906 | ||
2a1288ff | 907 | CMSG_FOREACH(cmsg, &msghdr) { |
979558f3 TG |
908 | if (cmsg->cmsg_level == SOL_SOCKET && |
909 | cmsg->cmsg_type == SCM_CREDENTIALS && | |
910 | cmsg->cmsg_len == CMSG_LEN(sizeof(struct ucred))) | |
911 | ucred = (struct ucred*) CMSG_DATA(cmsg); | |
912 | } | |
913 | ||
914 | if (!ucred || ucred->pid <= 0) { | |
915 | log_warning_errno(EIO, "ignoring worker message without valid PID"); | |
916 | continue; | |
917 | } | |
912541b0 KS |
918 | |
919 | /* lookup worker who sent the signal */ | |
4a0b58c4 | 920 | worker = hashmap_get(manager->workers, PID_TO_PTR(ucred->pid)); |
a505965d TG |
921 | if (!worker) { |
922 | log_debug("worker ["PID_FMT"] returned, but is no longer tracked", ucred->pid); | |
923 | continue; | |
912541b0 | 924 | } |
c0bbfd72 | 925 | |
a505965d TG |
926 | if (worker->state != WORKER_KILLED) |
927 | worker->state = WORKER_IDLE; | |
928 | ||
929 | /* worker returned */ | |
930 | event_free(worker->event); | |
912541b0 | 931 | } |
e82e8fa5 | 932 | |
8302fe5a TG |
933 | /* we have free workers, try to schedule events */ |
934 | event_queue_start(manager); | |
935 | ||
e82e8fa5 TG |
936 | return 1; |
937 | } | |
938 | ||
f00d2b6d | 939 | static int on_uevent(sd_device_monitor *monitor, sd_device *dev, void *userdata) { |
7f2e3a14 | 940 | _cleanup_(udev_device_unrefp) struct udev_device *udev_device = NULL; |
c0c6806b | 941 | Manager *manager = userdata; |
e82e8fa5 TG |
942 | int r; |
943 | ||
c0c6806b | 944 | assert(manager); |
e82e8fa5 | 945 | |
7f2e3a14 YW |
946 | device_ensure_usec_initialized(dev, NULL); |
947 | ||
948 | udev_device = udev_device_new(NULL, dev); | |
949 | if (!udev_device) | |
950 | return 1; | |
951 | ||
952 | r = event_queue_insert(manager, udev_device); | |
953 | if (r < 0) | |
954 | return 1; | |
955 | ||
956 | udev_device = NULL; | |
957 | ||
958 | /* we have fresh events, try to schedule them */ | |
959 | event_queue_start(manager); | |
e82e8fa5 TG |
960 | |
961 | return 1; | |
88f4b648 KS |
962 | } |
963 | ||
3b47c739 | 964 | /* receive the udevd message from userspace */ |
e82e8fa5 | 965 | static int on_ctrl_msg(sd_event_source *s, int fd, uint32_t revents, void *userdata) { |
c0c6806b | 966 | Manager *manager = userdata; |
8e766630 LP |
967 | _cleanup_(udev_ctrl_connection_unrefp) struct udev_ctrl_connection *ctrl_conn = NULL; |
968 | _cleanup_(udev_ctrl_msg_unrefp) struct udev_ctrl_msg *ctrl_msg = NULL; | |
912541b0 | 969 | const char *str; |
9b5150b6 | 970 | int i, r; |
912541b0 | 971 | |
c0c6806b | 972 | assert(manager); |
e4f66b77 | 973 | |
c0c6806b | 974 | ctrl_conn = udev_ctrl_get_connection(manager->ctrl); |
e4f66b77 | 975 | if (!ctrl_conn) |
e82e8fa5 | 976 | return 1; |
912541b0 KS |
977 | |
978 | ctrl_msg = udev_ctrl_receive_msg(ctrl_conn); | |
e4f66b77 | 979 | if (!ctrl_msg) |
e82e8fa5 | 980 | return 1; |
912541b0 KS |
981 | |
982 | i = udev_ctrl_get_set_log_level(ctrl_msg); | |
983 | if (i >= 0) { | |
ed14edc0 | 984 | log_debug("udevd message (SET_LOG_LEVEL) received, log_priority=%i", i); |
baa30fbc | 985 | log_set_max_level(i); |
c0c6806b | 986 | manager_kill_workers(manager); |
912541b0 KS |
987 | } |
988 | ||
989 | if (udev_ctrl_get_stop_exec_queue(ctrl_msg) > 0) { | |
9f6445e3 | 990 | log_debug("udevd message (STOP_EXEC_QUEUE) received"); |
c0c6806b | 991 | manager->stop_exec_queue = true; |
912541b0 KS |
992 | } |
993 | ||
994 | if (udev_ctrl_get_start_exec_queue(ctrl_msg) > 0) { | |
9f6445e3 | 995 | log_debug("udevd message (START_EXEC_QUEUE) received"); |
c0c6806b | 996 | manager->stop_exec_queue = false; |
8302fe5a | 997 | event_queue_start(manager); |
912541b0 KS |
998 | } |
999 | ||
1000 | if (udev_ctrl_get_reload(ctrl_msg) > 0) { | |
9f6445e3 | 1001 | log_debug("udevd message (RELOAD) received"); |
62d43dac | 1002 | manager_reload(manager); |
912541b0 KS |
1003 | } |
1004 | ||
1005 | str = udev_ctrl_get_set_env(ctrl_msg); | |
9b5150b6 YW |
1006 | if (str) { |
1007 | _cleanup_free_ char *key = NULL, *val = NULL, *old_key = NULL, *old_val = NULL; | |
1008 | char *eq; | |
1009 | ||
1010 | eq = strchr(str, '='); | |
1011 | if (!eq) { | |
1012 | log_error("Invalid key format '%s'", str); | |
1013 | return 1; | |
1014 | } | |
1015 | ||
1016 | key = strndup(str, eq - str); | |
1017 | if (!key) { | |
1018 | log_oom(); | |
1019 | return 1; | |
1020 | } | |
1021 | ||
1022 | old_val = hashmap_remove2(manager->properties, key, (void **) &old_key); | |
1023 | ||
1024 | r = hashmap_ensure_allocated(&manager->properties, &string_hash_ops); | |
1025 | if (r < 0) { | |
1026 | log_oom(); | |
1027 | return 1; | |
912541b0 | 1028 | } |
9b5150b6 YW |
1029 | |
1030 | eq++; | |
1031 | if (!isempty(eq)) { | |
1032 | log_debug("udevd message (ENV) received, unset '%s'", key); | |
1033 | ||
1034 | r = hashmap_put(manager->properties, key, NULL); | |
1035 | if (r < 0) { | |
1036 | log_oom(); | |
1037 | return 1; | |
1038 | } | |
1039 | } else { | |
1040 | val = strdup(eq); | |
1041 | if (!val) { | |
1042 | log_oom(); | |
1043 | return 1; | |
1044 | } | |
1045 | ||
1046 | log_debug("udevd message (ENV) received, set '%s=%s'", key, val); | |
1047 | ||
1048 | r = hashmap_put(manager->properties, key, val); | |
1049 | if (r < 0) { | |
1050 | log_oom(); | |
1051 | return 1; | |
1052 | } | |
1053 | } | |
1054 | ||
1055 | key = val = NULL; | |
c0c6806b | 1056 | manager_kill_workers(manager); |
912541b0 KS |
1057 | } |
1058 | ||
1059 | i = udev_ctrl_get_set_children_max(ctrl_msg); | |
1060 | if (i >= 0) { | |
9f6445e3 | 1061 | log_debug("udevd message (SET_MAX_CHILDREN) received, children_max=%i", i); |
bba7a484 | 1062 | arg_children_max = i; |
1ef72b55 MS |
1063 | |
1064 | (void) sd_notifyf(false, | |
1065 | "READY=1\n" | |
1066 | "STATUS=Processing with %u children at max", arg_children_max); | |
912541b0 KS |
1067 | } |
1068 | ||
cb49a4f2 | 1069 | if (udev_ctrl_get_ping(ctrl_msg) > 0) |
9f6445e3 | 1070 | log_debug("udevd message (SYNC) received"); |
912541b0 KS |
1071 | |
1072 | if (udev_ctrl_get_exit(ctrl_msg) > 0) { | |
9f6445e3 | 1073 | log_debug("udevd message (EXIT) received"); |
62d43dac | 1074 | manager_exit(manager); |
c0c6806b TG |
1075 | /* keep reference to block the client until we exit |
1076 | TODO: deal with several blocking exit requests */ | |
1077 | manager->ctrl_conn_blocking = udev_ctrl_connection_ref(ctrl_conn); | |
912541b0 | 1078 | } |
e4f66b77 | 1079 | |
e82e8fa5 | 1080 | return 1; |
88f4b648 | 1081 | } |
4a231017 | 1082 | |
70068602 YW |
1083 | static int synthesize_change(sd_device *dev) { |
1084 | const char *subsystem, *sysname, *devname, *syspath, *devtype; | |
1085 | char filename[PATH_MAX]; | |
f3a740a5 | 1086 | int r; |
edd32000 | 1087 | |
70068602 YW |
1088 | r = sd_device_get_subsystem(dev, &subsystem); |
1089 | if (r < 0) | |
1090 | return r; | |
1091 | ||
1092 | r = sd_device_get_sysname(dev, &sysname); | |
1093 | if (r < 0) | |
1094 | return r; | |
1095 | ||
1096 | r = sd_device_get_devname(dev, &devname); | |
1097 | if (r < 0) | |
1098 | return r; | |
1099 | ||
1100 | r = sd_device_get_syspath(dev, &syspath); | |
1101 | if (r < 0) | |
1102 | return r; | |
1103 | ||
1104 | r = sd_device_get_devtype(dev, &devtype); | |
1105 | if (r < 0) | |
1106 | return r; | |
1107 | ||
1108 | if (streq_ptr("block", subsystem) && | |
1109 | streq_ptr("disk", devtype) && | |
1110 | !startswith(sysname, "dm-")) { | |
1111 | _cleanup_(sd_device_enumerator_unrefp) sd_device_enumerator *e = NULL; | |
1112 | bool part_table_read = false, has_partitions = false; | |
1113 | sd_device *d; | |
ede34445 | 1114 | int fd; |
f3a740a5 | 1115 | |
ede34445 | 1116 | /* |
e9fc29f4 KS |
1117 | * Try to re-read the partition table. This only succeeds if |
1118 | * none of the devices is busy. The kernel returns 0 if no | |
1119 | * partition table is found, and we will not get an event for | |
1120 | * the disk. | |
ede34445 | 1121 | */ |
70068602 | 1122 | fd = open(devname, O_RDONLY|O_CLOEXEC|O_NOFOLLOW|O_NONBLOCK); |
ede34445 | 1123 | if (fd >= 0) { |
02ba8fb3 KS |
1124 | r = flock(fd, LOCK_EX|LOCK_NB); |
1125 | if (r >= 0) | |
1126 | r = ioctl(fd, BLKRRPART, 0); | |
1127 | ||
ede34445 KS |
1128 | close(fd); |
1129 | if (r >= 0) | |
e9fc29f4 | 1130 | part_table_read = true; |
ede34445 KS |
1131 | } |
1132 | ||
e9fc29f4 | 1133 | /* search for partitions */ |
70068602 | 1134 | r = sd_device_enumerator_new(&e); |
f3a740a5 KS |
1135 | if (r < 0) |
1136 | return r; | |
1137 | ||
70068602 | 1138 | r = sd_device_enumerator_allow_uninitialized(e); |
f3a740a5 KS |
1139 | if (r < 0) |
1140 | return r; | |
1141 | ||
70068602 | 1142 | r = sd_device_enumerator_add_match_parent(e, dev); |
47a3fa0f TA |
1143 | if (r < 0) |
1144 | return r; | |
e9fc29f4 | 1145 | |
70068602 YW |
1146 | r = sd_device_enumerator_add_match_subsystem(e, "block", true); |
1147 | if (r < 0) | |
1148 | return r; | |
e9fc29f4 | 1149 | |
70068602 YW |
1150 | FOREACH_DEVICE(e, d) { |
1151 | const char *t; | |
e9fc29f4 | 1152 | |
70068602 YW |
1153 | if (sd_device_get_devtype(d, &t) < 0 || |
1154 | !streq("partition", t)) | |
e9fc29f4 KS |
1155 | continue; |
1156 | ||
1157 | has_partitions = true; | |
1158 | break; | |
1159 | } | |
1160 | ||
1161 | /* | |
1162 | * We have partitions and re-read the table, the kernel already sent | |
1163 | * out a "change" event for the disk, and "remove/add" for all | |
1164 | * partitions. | |
1165 | */ | |
1166 | if (part_table_read && has_partitions) | |
1167 | return 0; | |
1168 | ||
1169 | /* | |
1170 | * We have partitions but re-reading the partition table did not | |
1171 | * work, synthesize "change" for the disk and all partitions. | |
1172 | */ | |
70068602 YW |
1173 | log_debug("Device '%s' is closed, synthesising 'change'", devname); |
1174 | strscpyl(filename, sizeof(filename), syspath, "/uevent", NULL); | |
57512c89 | 1175 | write_string_file(filename, "change", WRITE_STRING_FILE_DISABLE_BUFFER); |
e9fc29f4 | 1176 | |
70068602 YW |
1177 | FOREACH_DEVICE(e, d) { |
1178 | const char *t, *n, *s; | |
f3a740a5 | 1179 | |
70068602 YW |
1180 | if (sd_device_get_devtype(d, &t) < 0 || |
1181 | !streq("partition", t)) | |
f3a740a5 KS |
1182 | continue; |
1183 | ||
70068602 YW |
1184 | if (sd_device_get_devname(d, &n) < 0 || |
1185 | sd_device_get_syspath(d, &s) < 0) | |
f3a740a5 KS |
1186 | continue; |
1187 | ||
70068602 YW |
1188 | log_debug("Device '%s' is closed, synthesising partition '%s' 'change'", devname, n); |
1189 | strscpyl(filename, sizeof(filename), s, "/uevent", NULL); | |
57512c89 | 1190 | write_string_file(filename, "change", WRITE_STRING_FILE_DISABLE_BUFFER); |
f3a740a5 | 1191 | } |
ede34445 KS |
1192 | |
1193 | return 0; | |
f3a740a5 KS |
1194 | } |
1195 | ||
70068602 YW |
1196 | log_debug("Device %s is closed, synthesising 'change'", devname); |
1197 | strscpyl(filename, sizeof(filename), syspath, "/uevent", NULL); | |
57512c89 | 1198 | write_string_file(filename, "change", WRITE_STRING_FILE_DISABLE_BUFFER); |
ede34445 | 1199 | |
f3a740a5 | 1200 | return 0; |
edd32000 KS |
1201 | } |
1202 | ||
e82e8fa5 | 1203 | static int on_inotify(sd_event_source *s, int fd, uint32_t revents, void *userdata) { |
c0c6806b | 1204 | Manager *manager = userdata; |
0254e944 | 1205 | union inotify_event_buffer buffer; |
f7c1ad4f LP |
1206 | struct inotify_event *e; |
1207 | ssize_t l; | |
0725c4b9 | 1208 | int r; |
912541b0 | 1209 | |
c0c6806b | 1210 | assert(manager); |
e82e8fa5 | 1211 | |
0725c4b9 YW |
1212 | r = event_source_disable(manager->kill_workers_event); |
1213 | if (r < 0) | |
1214 | log_warning_errno(r, "Failed to disable event source for cleaning up idle workers, ignoring: %m"); | |
eca195ec | 1215 | |
e82e8fa5 | 1216 | l = read(fd, &buffer, sizeof(buffer)); |
f7c1ad4f | 1217 | if (l < 0) { |
3742095b | 1218 | if (IN_SET(errno, EAGAIN, EINTR)) |
e82e8fa5 | 1219 | return 1; |
912541b0 | 1220 | |
f7c1ad4f | 1221 | return log_error_errno(errno, "Failed to read inotify fd: %m"); |
912541b0 KS |
1222 | } |
1223 | ||
f7c1ad4f | 1224 | FOREACH_INOTIFY_EVENT(e, buffer, l) { |
70068602 YW |
1225 | _cleanup_(sd_device_unrefp) sd_device *dev = NULL; |
1226 | const char *devnode; | |
1227 | ||
7fe3324c | 1228 | if (udev_watch_lookup(e->wd, &dev) <= 0) |
70068602 | 1229 | continue; |
912541b0 | 1230 | |
70068602 | 1231 | if (sd_device_get_devname(dev, &devnode) < 0) |
edd32000 | 1232 | continue; |
912541b0 | 1233 | |
7fe3324c | 1234 | log_device_debug(dev, "Inotify event: %x for %s", e->mask, devnode); |
da143134 | 1235 | if (e->mask & IN_CLOSE_WRITE) |
edd32000 | 1236 | synthesize_change(dev); |
da143134 | 1237 | else if (e->mask & IN_IGNORED) |
2024ed61 | 1238 | udev_watch_end(dev); |
912541b0 KS |
1239 | } |
1240 | ||
e82e8fa5 | 1241 | return 1; |
bd284db1 SJR |
1242 | } |
1243 | ||
0561329d | 1244 | static int on_sigterm(sd_event_source *s, const struct signalfd_siginfo *si, void *userdata) { |
c0c6806b TG |
1245 | Manager *manager = userdata; |
1246 | ||
1247 | assert(manager); | |
1248 | ||
62d43dac | 1249 | manager_exit(manager); |
912541b0 | 1250 | |
e82e8fa5 TG |
1251 | return 1; |
1252 | } | |
912541b0 | 1253 | |
0561329d | 1254 | static int on_sighup(sd_event_source *s, const struct signalfd_siginfo *si, void *userdata) { |
c0c6806b TG |
1255 | Manager *manager = userdata; |
1256 | ||
1257 | assert(manager); | |
1258 | ||
62d43dac | 1259 | manager_reload(manager); |
912541b0 | 1260 | |
e82e8fa5 TG |
1261 | return 1; |
1262 | } | |
912541b0 | 1263 | |
e82e8fa5 | 1264 | static int on_sigchld(sd_event_source *s, const struct signalfd_siginfo *si, void *userdata) { |
c0c6806b | 1265 | Manager *manager = userdata; |
0725c4b9 | 1266 | int r; |
c0c6806b TG |
1267 | |
1268 | assert(manager); | |
1269 | ||
e82e8fa5 TG |
1270 | for (;;) { |
1271 | pid_t pid; | |
1272 | int status; | |
1273 | struct worker *worker; | |
d1317d02 | 1274 | |
e82e8fa5 TG |
1275 | pid = waitpid(-1, &status, WNOHANG); |
1276 | if (pid <= 0) | |
f29328d6 | 1277 | break; |
e82e8fa5 | 1278 | |
4a0b58c4 | 1279 | worker = hashmap_get(manager->workers, PID_TO_PTR(pid)); |
e82e8fa5 TG |
1280 | if (!worker) { |
1281 | log_warning("worker ["PID_FMT"] is unknown, ignoring", pid); | |
f29328d6 | 1282 | continue; |
912541b0 | 1283 | } |
e82e8fa5 TG |
1284 | |
1285 | if (WIFEXITED(status)) { | |
1286 | if (WEXITSTATUS(status) == 0) | |
1287 | log_debug("worker ["PID_FMT"] exited", pid); | |
1288 | else | |
1289 | log_warning("worker ["PID_FMT"] exited with return code %i", pid, WEXITSTATUS(status)); | |
1290 | } else if (WIFSIGNALED(status)) { | |
76341acc | 1291 | log_warning("worker ["PID_FMT"] terminated by signal %i (%s)", pid, WTERMSIG(status), signal_to_string(WTERMSIG(status))); |
e82e8fa5 TG |
1292 | } else if (WIFSTOPPED(status)) { |
1293 | log_info("worker ["PID_FMT"] stopped", pid); | |
f29328d6 | 1294 | continue; |
e82e8fa5 TG |
1295 | } else if (WIFCONTINUED(status)) { |
1296 | log_info("worker ["PID_FMT"] continued", pid); | |
f29328d6 | 1297 | continue; |
e82e8fa5 TG |
1298 | } else |
1299 | log_warning("worker ["PID_FMT"] exit with status 0x%04x", pid, status); | |
1300 | ||
05e6d9c6 YW |
1301 | if ((!WIFEXITED(status) || WEXITSTATUS(status) != 0) && worker->event) { |
1302 | log_error("worker ["PID_FMT"] failed while handling '%s'", pid, worker->event->devpath); | |
1303 | /* delete state from disk */ | |
1304 | udev_device_delete_db(worker->event->dev); | |
1305 | udev_device_tag_index(worker->event->dev, NULL, false); | |
1306 | /* forward kernel event without amending it */ | |
7f2e3a14 | 1307 | device_monitor_send_device(manager->monitor, NULL, worker->event->dev_kernel->device); |
e82e8fa5 TG |
1308 | } |
1309 | ||
1310 | worker_free(worker); | |
912541b0 | 1311 | } |
e82e8fa5 | 1312 | |
8302fe5a TG |
1313 | /* we can start new workers, try to schedule events */ |
1314 | event_queue_start(manager); | |
1315 | ||
eca195ec | 1316 | /* Disable unnecessary cleanup event */ |
0725c4b9 YW |
1317 | if (hashmap_isempty(manager->workers)) { |
1318 | r = event_source_disable(manager->kill_workers_event); | |
1319 | if (r < 0) | |
1320 | log_warning_errno(r, "Failed to disable event source for cleaning up idle workers, ignoring: %m"); | |
1321 | } | |
eca195ec | 1322 | |
e82e8fa5 | 1323 | return 1; |
f27125f9 | 1324 | } |
1325 | ||
693d371d TG |
1326 | static int on_post(sd_event_source *s, void *userdata) { |
1327 | Manager *manager = userdata; | |
693d371d TG |
1328 | |
1329 | assert(manager); | |
1330 | ||
b6107f01 YW |
1331 | if (!LIST_IS_EMPTY(manager->events)) |
1332 | return 1; | |
1333 | ||
1334 | /* There are no pending events. Let's cleanup idle process. */ | |
1335 | ||
1336 | if (!hashmap_isempty(manager->workers)) { | |
1337 | /* There are idle workers */ | |
6d63048a YW |
1338 | (void) event_reset_time(manager->event, &manager->kill_workers_event, CLOCK_MONOTONIC, |
1339 | now(CLOCK_MONOTONIC) + 3 * USEC_PER_SEC, USEC_PER_SEC, | |
1340 | on_kill_workers_event, manager, 0, "kill-workers-event", false); | |
b6107f01 | 1341 | return 1; |
693d371d TG |
1342 | } |
1343 | ||
b6107f01 YW |
1344 | /* There are no idle workers. */ |
1345 | ||
1346 | if (manager->exit) | |
1347 | return sd_event_exit(manager->event, 0); | |
1348 | ||
1349 | if (manager->cgroup) | |
1350 | /* cleanup possible left-over processes in our cgroup */ | |
1351 | (void) cg_kill(SYSTEMD_CGROUP_CONTROLLER, manager->cgroup, SIGKILL, CGROUP_IGNORE_SELF, NULL, NULL, NULL); | |
1352 | ||
693d371d TG |
1353 | return 1; |
1354 | } | |
1355 | ||
c4b69e99 | 1356 | static int listen_fds(int *ret_ctrl, int *ret_netlink) { |
fcff1e72 | 1357 | int ctrl_fd = -1, netlink_fd = -1; |
c4b69e99 | 1358 | int fd, n; |
912541b0 | 1359 | |
c4b69e99 YW |
1360 | assert(ret_ctrl); |
1361 | assert(ret_netlink); | |
fcff1e72 | 1362 | |
912541b0 | 1363 | n = sd_listen_fds(true); |
fcff1e72 TG |
1364 | if (n < 0) |
1365 | return n; | |
912541b0 KS |
1366 | |
1367 | for (fd = SD_LISTEN_FDS_START; fd < n + SD_LISTEN_FDS_START; fd++) { | |
c52cff07 | 1368 | if (sd_is_socket(fd, AF_LOCAL, SOCK_SEQPACKET, -1) > 0) { |
fcff1e72 TG |
1369 | if (ctrl_fd >= 0) |
1370 | return -EINVAL; | |
1371 | ctrl_fd = fd; | |
912541b0 KS |
1372 | continue; |
1373 | } | |
1374 | ||
c52cff07 | 1375 | if (sd_is_socket(fd, AF_NETLINK, SOCK_RAW, -1) > 0) { |
fcff1e72 TG |
1376 | if (netlink_fd >= 0) |
1377 | return -EINVAL; | |
1378 | netlink_fd = fd; | |
912541b0 KS |
1379 | continue; |
1380 | } | |
1381 | ||
fcff1e72 | 1382 | return -EINVAL; |
912541b0 KS |
1383 | } |
1384 | ||
c4b69e99 YW |
1385 | *ret_ctrl = ctrl_fd; |
1386 | *ret_netlink = netlink_fd; | |
912541b0 | 1387 | |
912541b0 | 1388 | return 0; |
7459bcdc KS |
1389 | } |
1390 | ||
e6f86cac | 1391 | /* |
3f85ef0f | 1392 | * read the kernel command line, in case we need to get into debug mode |
1d84ad94 LP |
1393 | * udev.log_priority=<level> syslog priority |
1394 | * udev.children_max=<number of workers> events are fully serialized if set to 1 | |
1395 | * udev.exec_delay=<number of seconds> delay execution of every executed program | |
1396 | * udev.event_timeout=<number of seconds> seconds to wait before terminating an event | |
e6f86cac | 1397 | */ |
96287a49 | 1398 | static int parse_proc_cmdline_item(const char *key, const char *value, void *data) { |
92e72467 | 1399 | int r = 0; |
e6f86cac | 1400 | |
614a823c | 1401 | assert(key); |
e6f86cac | 1402 | |
614a823c TG |
1403 | if (!value) |
1404 | return 0; | |
e6f86cac | 1405 | |
1d84ad94 LP |
1406 | if (proc_cmdline_key_streq(key, "udev.log_priority")) { |
1407 | ||
1408 | if (proc_cmdline_value_missing(key, value)) | |
1409 | return 0; | |
1410 | ||
46f0fbd8 | 1411 | r = log_level_from_string(value); |
92e72467 ZJS |
1412 | if (r >= 0) |
1413 | log_set_max_level(r); | |
1d84ad94 LP |
1414 | |
1415 | } else if (proc_cmdline_key_streq(key, "udev.event_timeout")) { | |
1416 | ||
1417 | if (proc_cmdline_value_missing(key, value)) | |
1418 | return 0; | |
1419 | ||
9d9264ba | 1420 | r = parse_sec(value, &arg_event_timeout_usec); |
1d84ad94 LP |
1421 | |
1422 | } else if (proc_cmdline_key_streq(key, "udev.children_max")) { | |
1423 | ||
1424 | if (proc_cmdline_value_missing(key, value)) | |
1425 | return 0; | |
1426 | ||
020328e1 | 1427 | r = safe_atou(value, &arg_children_max); |
1d84ad94 LP |
1428 | |
1429 | } else if (proc_cmdline_key_streq(key, "udev.exec_delay")) { | |
1430 | ||
1431 | if (proc_cmdline_value_missing(key, value)) | |
1432 | return 0; | |
1433 | ||
6b92f429 | 1434 | r = parse_sec(value, &arg_exec_delay_usec); |
1d84ad94 LP |
1435 | |
1436 | } else if (startswith(key, "udev.")) | |
92e72467 | 1437 | log_warning("Unknown udev kernel command line option \"%s\"", key); |
614a823c | 1438 | |
92e72467 ZJS |
1439 | if (r < 0) |
1440 | log_warning_errno(r, "Failed to parse \"%s=%s\", ignoring: %m", key, value); | |
1d84ad94 | 1441 | |
614a823c | 1442 | return 0; |
e6f86cac KS |
1443 | } |
1444 | ||
37ec0fdd LP |
1445 | static int help(void) { |
1446 | _cleanup_free_ char *link = NULL; | |
1447 | int r; | |
1448 | ||
1449 | r = terminal_urlify_man("systemd-udevd.service", "8", &link); | |
1450 | if (r < 0) | |
1451 | return log_oom(); | |
1452 | ||
ed216e1f TG |
1453 | printf("%s [OPTIONS...]\n\n" |
1454 | "Manages devices.\n\n" | |
5ac0162c | 1455 | " -h --help Print this message\n" |
2d19c17e MF |
1456 | " -V --version Print version of the program\n" |
1457 | " -d --daemon Detach and run in the background\n" | |
1458 | " -D --debug Enable debug output\n" | |
1459 | " -c --children-max=INT Set maximum number of workers\n" | |
1460 | " -e --exec-delay=SECONDS Seconds to wait before executing RUN=\n" | |
1461 | " -t --event-timeout=SECONDS Seconds to wait before terminating an event\n" | |
1462 | " -N --resolve-names=early|late|never\n" | |
5ac0162c | 1463 | " When to resolve users and groups\n" |
37ec0fdd LP |
1464 | "\nSee the %s for details.\n" |
1465 | , program_invocation_short_name | |
1466 | , link | |
1467 | ); | |
1468 | ||
1469 | return 0; | |
ed216e1f TG |
1470 | } |
1471 | ||
bba7a484 | 1472 | static int parse_argv(int argc, char *argv[]) { |
912541b0 | 1473 | static const struct option options[] = { |
bba7a484 TG |
1474 | { "daemon", no_argument, NULL, 'd' }, |
1475 | { "debug", no_argument, NULL, 'D' }, | |
1476 | { "children-max", required_argument, NULL, 'c' }, | |
1477 | { "exec-delay", required_argument, NULL, 'e' }, | |
1478 | { "event-timeout", required_argument, NULL, 't' }, | |
1479 | { "resolve-names", required_argument, NULL, 'N' }, | |
1480 | { "help", no_argument, NULL, 'h' }, | |
1481 | { "version", no_argument, NULL, 'V' }, | |
912541b0 KS |
1482 | {} |
1483 | }; | |
689a97f5 | 1484 | |
bba7a484 | 1485 | int c; |
689a97f5 | 1486 | |
bba7a484 TG |
1487 | assert(argc >= 0); |
1488 | assert(argv); | |
912541b0 | 1489 | |
e14b6f21 | 1490 | while ((c = getopt_long(argc, argv, "c:de:Dt:N:hV", options, NULL)) >= 0) { |
f1e8664e | 1491 | int r; |
912541b0 | 1492 | |
bba7a484 | 1493 | switch (c) { |
912541b0 | 1494 | |
912541b0 | 1495 | case 'd': |
bba7a484 | 1496 | arg_daemonize = true; |
912541b0 KS |
1497 | break; |
1498 | case 'c': | |
020328e1 | 1499 | r = safe_atou(optarg, &arg_children_max); |
6f5cf8a8 | 1500 | if (r < 0) |
389f9bf2 | 1501 | log_warning_errno(r, "Failed to parse --children-max= value '%s', ignoring: %m", optarg); |
912541b0 KS |
1502 | break; |
1503 | case 'e': | |
6b92f429 | 1504 | r = parse_sec(optarg, &arg_exec_delay_usec); |
6f5cf8a8 | 1505 | if (r < 0) |
6b92f429 | 1506 | log_warning_errno(r, "Failed to parse --exec-delay= value '%s', ignoring: %m", optarg); |
912541b0 | 1507 | break; |
9719859c | 1508 | case 't': |
9d9264ba | 1509 | r = parse_sec(optarg, &arg_event_timeout_usec); |
f1e8664e | 1510 | if (r < 0) |
9d9264ba | 1511 | log_warning_errno(r, "Failed to parse --event-timeout= value '%s', ignoring: %m", optarg); |
9719859c | 1512 | break; |
912541b0 | 1513 | case 'D': |
bba7a484 | 1514 | arg_debug = true; |
912541b0 | 1515 | break; |
c4d44cba YW |
1516 | case 'N': { |
1517 | ResolveNameTiming t; | |
1518 | ||
1519 | t = resolve_name_timing_from_string(optarg); | |
1520 | if (t < 0) | |
1521 | log_warning("Invalid --resolve-names= value '%s', ignoring.", optarg); | |
1522 | else | |
1523 | arg_resolve_name_timing = t; | |
912541b0 | 1524 | break; |
c4d44cba | 1525 | } |
912541b0 | 1526 | case 'h': |
37ec0fdd | 1527 | return help(); |
912541b0 | 1528 | case 'V': |
948aaa7c | 1529 | printf("%s\n", PACKAGE_VERSION); |
bba7a484 TG |
1530 | return 0; |
1531 | case '?': | |
1532 | return -EINVAL; | |
912541b0 | 1533 | default: |
bba7a484 TG |
1534 | assert_not_reached("Unhandled option"); |
1535 | ||
912541b0 KS |
1536 | } |
1537 | } | |
1538 | ||
bba7a484 TG |
1539 | return 1; |
1540 | } | |
1541 | ||
b7f74dd4 | 1542 | static int manager_new(Manager **ret, int fd_ctrl, int fd_uevent, const char *cgroup) { |
c0c6806b | 1543 | _cleanup_(manager_freep) Manager *manager = NULL; |
6d5e65f6 | 1544 | int r, fd_worker; |
c0c6806b TG |
1545 | |
1546 | assert(ret); | |
1547 | ||
6f19b42f | 1548 | manager = new(Manager, 1); |
c0c6806b TG |
1549 | if (!manager) |
1550 | return log_oom(); | |
1551 | ||
6f19b42f YW |
1552 | *manager = (Manager) { |
1553 | .fd_inotify = -1, | |
1554 | .worker_watch = { -1, -1 }, | |
1555 | .cgroup = cgroup, | |
1556 | }; | |
e237d8cb | 1557 | |
2024ed61 | 1558 | udev_builtin_init(); |
b2d21d93 | 1559 | |
c4d44cba | 1560 | manager->rules = udev_rules_new(arg_resolve_name_timing); |
ecb17862 TG |
1561 | if (!manager->rules) |
1562 | return log_error_errno(ENOMEM, "error reading rules"); | |
1563 | ||
2024ed61 | 1564 | manager->ctrl = udev_ctrl_new_from_fd(fd_ctrl); |
f59118ec TG |
1565 | if (!manager->ctrl) |
1566 | return log_error_errno(EINVAL, "error taking over udev control socket"); | |
e237d8cb | 1567 | |
c4b69e99 YW |
1568 | r = udev_ctrl_enable_receiving(manager->ctrl); |
1569 | if (r < 0) | |
1570 | return log_error_errno(r, "Failed to bind udev control socket: %m"); | |
1571 | ||
1572 | fd_ctrl = udev_ctrl_get_fd(manager->ctrl); | |
1573 | if (fd_ctrl < 0) | |
1574 | return log_error_errno(fd_ctrl, "Failed to get udev control fd: %m"); | |
1575 | ||
7f2e3a14 YW |
1576 | r = device_monitor_new_full(&manager->monitor, MONITOR_GROUP_KERNEL, fd_uevent); |
1577 | if (r < 0) | |
1578 | return log_error_errno(r, "Failed to initialize device monitor: %m"); | |
e237d8cb | 1579 | |
7f2e3a14 | 1580 | (void) sd_device_monitor_set_receive_buffer_size(manager->monitor, 128 * 1024 * 1024); |
c4b69e99 | 1581 | |
e237d8cb TG |
1582 | /* unnamed socket from workers to the main daemon */ |
1583 | r = socketpair(AF_LOCAL, SOCK_DGRAM|SOCK_CLOEXEC, 0, manager->worker_watch); | |
1584 | if (r < 0) | |
1585 | return log_error_errno(errno, "error creating socketpair: %m"); | |
1586 | ||
693d371d | 1587 | fd_worker = manager->worker_watch[READ_END]; |
e237d8cb | 1588 | |
2ff48e98 | 1589 | r = setsockopt_int(fd_worker, SOL_SOCKET, SO_PASSCRED, true); |
e237d8cb | 1590 | if (r < 0) |
2ff48e98 | 1591 | return log_error_errno(r, "could not enable SO_PASSCRED: %m"); |
e237d8cb | 1592 | |
b7759e04 YW |
1593 | r = udev_watch_init(); |
1594 | if (r < 0) | |
1595 | return log_error_errno(r, "Failed to create inotify descriptor: %m"); | |
1596 | manager->fd_inotify = r; | |
e237d8cb | 1597 | |
2024ed61 | 1598 | udev_watch_restore(); |
e237d8cb TG |
1599 | |
1600 | /* block and listen to all signals on signalfd */ | |
72c0a2c2 | 1601 | assert_se(sigprocmask_many(SIG_BLOCK, NULL, SIGTERM, SIGINT, SIGHUP, SIGCHLD, -1) >= 0); |
693d371d | 1602 | |
49f997f3 TG |
1603 | r = sd_event_default(&manager->event); |
1604 | if (r < 0) | |
709f6e46 | 1605 | return log_error_errno(r, "could not allocate event loop: %m"); |
49f997f3 | 1606 | |
693d371d TG |
1607 | r = sd_event_add_signal(manager->event, NULL, SIGINT, on_sigterm, manager); |
1608 | if (r < 0) | |
1609 | return log_error_errno(r, "error creating sigint event source: %m"); | |
1610 | ||
1611 | r = sd_event_add_signal(manager->event, NULL, SIGTERM, on_sigterm, manager); | |
1612 | if (r < 0) | |
1613 | return log_error_errno(r, "error creating sigterm event source: %m"); | |
1614 | ||
1615 | r = sd_event_add_signal(manager->event, NULL, SIGHUP, on_sighup, manager); | |
1616 | if (r < 0) | |
1617 | return log_error_errno(r, "error creating sighup event source: %m"); | |
1618 | ||
1619 | r = sd_event_add_signal(manager->event, NULL, SIGCHLD, on_sigchld, manager); | |
1620 | if (r < 0) | |
1621 | return log_error_errno(r, "error creating sigchld event source: %m"); | |
1622 | ||
1623 | r = sd_event_set_watchdog(manager->event, true); | |
1624 | if (r < 0) | |
1625 | return log_error_errno(r, "error creating watchdog event source: %m"); | |
1626 | ||
11b1dd8c | 1627 | r = sd_event_add_io(manager->event, &manager->ctrl_event, fd_ctrl, EPOLLIN, on_ctrl_msg, manager); |
693d371d TG |
1628 | if (r < 0) |
1629 | return log_error_errno(r, "error creating ctrl event source: %m"); | |
1630 | ||
1631 | /* This needs to be after the inotify and uevent handling, to make sure | |
1632 | * that the ping is send back after fully processing the pending uevents | |
1633 | * (including the synthetic ones we may create due to inotify events). | |
1634 | */ | |
1635 | r = sd_event_source_set_priority(manager->ctrl_event, SD_EVENT_PRIORITY_IDLE); | |
1636 | if (r < 0) | |
1637 | return log_error_errno(r, "cold not set IDLE event priority for ctrl event source: %m"); | |
1638 | ||
1639 | r = sd_event_add_io(manager->event, &manager->inotify_event, manager->fd_inotify, EPOLLIN, on_inotify, manager); | |
1640 | if (r < 0) | |
1641 | return log_error_errno(r, "error creating inotify event source: %m"); | |
1642 | ||
f00d2b6d YW |
1643 | r = sd_device_monitor_attach_event(manager->monitor, manager->event); |
1644 | if (r < 0) | |
1645 | return log_error_errno(r, "Failed to attach event to device monitor: %m"); | |
1646 | ||
1647 | r = sd_device_monitor_start(manager->monitor, on_uevent, manager); | |
693d371d | 1648 | if (r < 0) |
f00d2b6d YW |
1649 | return log_error_errno(r, "Failed to start device monitor: %m"); |
1650 | ||
1651 | (void) sd_event_source_set_description(sd_device_monitor_get_event_source(manager->monitor), "device-monitor"); | |
693d371d TG |
1652 | |
1653 | r = sd_event_add_io(manager->event, NULL, fd_worker, EPOLLIN, on_worker, manager); | |
1654 | if (r < 0) | |
1655 | return log_error_errno(r, "error creating worker event source: %m"); | |
1656 | ||
1657 | r = sd_event_add_post(manager->event, NULL, on_post, manager); | |
1658 | if (r < 0) | |
1659 | return log_error_errno(r, "error creating post event source: %m"); | |
e237d8cb | 1660 | |
1cc6c93a | 1661 | *ret = TAKE_PTR(manager); |
11b1dd8c | 1662 | |
86c3bece | 1663 | return 0; |
c0c6806b TG |
1664 | } |
1665 | ||
077fc5e2 | 1666 | static int run(int fd_ctrl, int fd_uevent, const char *cgroup) { |
c0c6806b | 1667 | _cleanup_(manager_freep) Manager *manager = NULL; |
077fc5e2 DH |
1668 | int r; |
1669 | ||
1670 | r = manager_new(&manager, fd_ctrl, fd_uevent, cgroup); | |
1671 | if (r < 0) { | |
1672 | r = log_error_errno(r, "failed to allocate manager object: %m"); | |
1673 | goto exit; | |
1674 | } | |
1675 | ||
1676 | r = udev_rules_apply_static_dev_perms(manager->rules); | |
1677 | if (r < 0) | |
1678 | log_error_errno(r, "failed to apply permissions on static device nodes: %m"); | |
1679 | ||
1ef72b55 MS |
1680 | (void) sd_notifyf(false, |
1681 | "READY=1\n" | |
1682 | "STATUS=Processing with %u children at max", arg_children_max); | |
077fc5e2 DH |
1683 | |
1684 | r = sd_event_loop(manager->event); | |
1685 | if (r < 0) { | |
1686 | log_error_errno(r, "event loop failed: %m"); | |
1687 | goto exit; | |
1688 | } | |
1689 | ||
1690 | sd_event_get_exit_code(manager->event, &r); | |
1691 | ||
1692 | exit: | |
1693 | sd_notify(false, | |
1694 | "STOPPING=1\n" | |
1695 | "STATUS=Shutting down..."); | |
1696 | if (manager) | |
1697 | udev_ctrl_cleanup(manager->ctrl); | |
1698 | return r; | |
1699 | } | |
1700 | ||
1701 | int main(int argc, char *argv[]) { | |
c26d1879 | 1702 | _cleanup_free_ char *cgroup = NULL; |
efa1606e | 1703 | int fd_ctrl = -1, fd_uevent = -1; |
e5d7bce1 | 1704 | int r; |
bba7a484 | 1705 | |
bba7a484 | 1706 | log_set_target(LOG_TARGET_AUTO); |
a14e7af1 | 1707 | udev_parse_config_full(&arg_children_max, &arg_exec_delay_usec, &arg_event_timeout_usec, &arg_resolve_name_timing); |
bba7a484 TG |
1708 | log_parse_environment(); |
1709 | log_open(); | |
1710 | ||
bba7a484 TG |
1711 | r = parse_argv(argc, argv); |
1712 | if (r <= 0) | |
1713 | goto exit; | |
1714 | ||
1d84ad94 | 1715 | r = proc_cmdline_parse(parse_proc_cmdline_item, NULL, PROC_CMDLINE_STRIP_RD_PREFIX); |
614a823c TG |
1716 | if (r < 0) |
1717 | log_warning_errno(r, "failed to parse kernel command line, ignoring: %m"); | |
912541b0 | 1718 | |
78d3e041 KS |
1719 | if (arg_debug) { |
1720 | log_set_target(LOG_TARGET_CONSOLE); | |
bba7a484 | 1721 | log_set_max_level(LOG_DEBUG); |
78d3e041 | 1722 | } |
bba7a484 | 1723 | |
6174a243 YW |
1724 | log_set_max_level_realm(LOG_REALM_SYSTEMD, log_get_max_level()); |
1725 | ||
fba868fa LP |
1726 | r = must_be_root(); |
1727 | if (r < 0) | |
912541b0 | 1728 | goto exit; |
912541b0 | 1729 | |
712cebf1 TG |
1730 | if (arg_children_max == 0) { |
1731 | cpu_set_t cpu_set; | |
e438c57a | 1732 | unsigned long mem_limit; |
ebc164ef | 1733 | |
712cebf1 | 1734 | arg_children_max = 8; |
d457ff83 | 1735 | |
ece174c5 | 1736 | if (sched_getaffinity(0, sizeof(cpu_set), &cpu_set) == 0) |
faae64fa | 1737 | arg_children_max += CPU_COUNT(&cpu_set) * 8; |
912541b0 | 1738 | |
e438c57a MW |
1739 | mem_limit = physical_memory() / (128LU*1024*1024); |
1740 | arg_children_max = MAX(10U, MIN(arg_children_max, mem_limit)); | |
1741 | ||
712cebf1 | 1742 | log_debug("set children_max to %u", arg_children_max); |
d457ff83 | 1743 | } |
912541b0 | 1744 | |
712cebf1 TG |
1745 | /* set umask before creating any file/directory */ |
1746 | r = chdir("/"); | |
1747 | if (r < 0) { | |
1748 | r = log_error_errno(errno, "could not change dir to /: %m"); | |
1749 | goto exit; | |
1750 | } | |
194bbe33 | 1751 | |
712cebf1 | 1752 | umask(022); |
912541b0 | 1753 | |
c3dacc8b | 1754 | r = mac_selinux_init(); |
712cebf1 TG |
1755 | if (r < 0) { |
1756 | log_error_errno(r, "could not initialize labelling: %m"); | |
1757 | goto exit; | |
912541b0 KS |
1758 | } |
1759 | ||
dae8b82e ZJS |
1760 | r = mkdir_errno_wrapper("/run/udev", 0755); |
1761 | if (r < 0 && r != -EEXIST) { | |
1762 | log_error_errno(r, "could not create /run/udev: %m"); | |
712cebf1 TG |
1763 | goto exit; |
1764 | } | |
1765 | ||
03cfe0d5 | 1766 | dev_setup(NULL, UID_INVALID, GID_INVALID); |
912541b0 | 1767 | |
c26d1879 TG |
1768 | if (getppid() == 1) { |
1769 | /* get our own cgroup, we regularly kill everything udev has left behind | |
1770 | we only do this on systemd systems, and only if we are directly spawned | |
1771 | by PID1. otherwise we are not guaranteed to have a dedicated cgroup */ | |
1772 | r = cg_pid_get_path(SYSTEMD_CGROUP_CONTROLLER, 0, &cgroup); | |
11b9fb15 | 1773 | if (r < 0) { |
a2d61f07 | 1774 | if (IN_SET(r, -ENOENT, -ENOMEDIUM)) |
11b9fb15 TG |
1775 | log_debug_errno(r, "did not find dedicated cgroup: %m"); |
1776 | else | |
1777 | log_warning_errno(r, "failed to get cgroup: %m"); | |
1778 | } | |
c26d1879 TG |
1779 | } |
1780 | ||
b7f74dd4 TG |
1781 | r = listen_fds(&fd_ctrl, &fd_uevent); |
1782 | if (r < 0) { | |
1783 | r = log_error_errno(r, "could not listen on fds: %m"); | |
1784 | goto exit; | |
1785 | } | |
1786 | ||
bba7a484 | 1787 | if (arg_daemonize) { |
912541b0 | 1788 | pid_t pid; |
912541b0 | 1789 | |
948aaa7c | 1790 | log_info("starting version " PACKAGE_VERSION); |
3cbb2057 | 1791 | |
40e749b5 | 1792 | /* connect /dev/null to stdin, stdout, stderr */ |
c76cf844 AK |
1793 | if (log_get_max_level() < LOG_DEBUG) { |
1794 | r = make_null_stdio(); | |
1795 | if (r < 0) | |
1796 | log_warning_errno(r, "Failed to redirect standard streams to /dev/null: %m"); | |
1797 | } | |
1798 | ||
912541b0 KS |
1799 | pid = fork(); |
1800 | switch (pid) { | |
1801 | case 0: | |
1802 | break; | |
1803 | case -1: | |
6af5e6a4 | 1804 | r = log_error_errno(errno, "fork of daemon failed: %m"); |
912541b0 KS |
1805 | goto exit; |
1806 | default: | |
f53d1fcd TG |
1807 | mac_selinux_finish(); |
1808 | log_close(); | |
1809 | _exit(EXIT_SUCCESS); | |
912541b0 KS |
1810 | } |
1811 | ||
1812 | setsid(); | |
1813 | ||
76cdddfb YW |
1814 | r = set_oom_score_adjust(-1000); |
1815 | if (r < 0) | |
1816 | log_debug_errno(r, "Failed to adjust OOM score, ignoring: %m"); | |
7500cd5e | 1817 | } |
912541b0 | 1818 | |
077fc5e2 | 1819 | r = run(fd_ctrl, fd_uevent, cgroup); |
693d371d | 1820 | |
53921bfa | 1821 | exit: |
cc56fafe | 1822 | mac_selinux_finish(); |
baa30fbc | 1823 | log_close(); |
6af5e6a4 | 1824 | return r < 0 ? EXIT_FAILURE : EXIT_SUCCESS; |
7fafc032 | 1825 | } |