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Commit | Line | Data |
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7fafc032 | 1 | /* |
ff2c503d | 2 | * Copyright (C) 2004-2011 Kay Sievers <kay.sievers@vrfy.org> |
2f6cbd19 | 3 | * Copyright (C) 2004 Chris Friesen <chris_friesen@sympatico.ca> |
bb38678e SJR |
4 | * Copyright (C) 2009 Canonical Ltd. |
5 | * Copyright (C) 2009 Scott James Remnant <scott@netsplit.com> | |
7fafc032 | 6 | * |
55e9959b KS |
7 | * This program is free software: you can redistribute it and/or modify |
8 | * it under the terms of the GNU General Public License as published by | |
9 | * the Free Software Foundation, either version 2 of the License, or | |
10 | * (at your option) any later version. | |
7fafc032 | 11 | * |
55e9959b KS |
12 | * This program is distributed in the hope that it will be useful, |
13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | * GNU General Public License for more details. | |
7fafc032 | 16 | * |
55e9959b KS |
17 | * You should have received a copy of the GNU General Public License |
18 | * along with this program. If not, see <http://www.gnu.org/licenses/>. | |
7fafc032 KS |
19 | */ |
20 | ||
a695feae | 21 | #include <stddef.h> |
7fafc032 KS |
22 | #include <signal.h> |
23 | #include <unistd.h> | |
24 | #include <errno.h> | |
25 | #include <stdio.h> | |
26 | #include <stdlib.h> | |
c3804728 | 27 | #include <stdbool.h> |
7fafc032 | 28 | #include <string.h> |
085cce37 | 29 | #include <ctype.h> |
085cce37 | 30 | #include <fcntl.h> |
0b3dfb3d | 31 | #include <time.h> |
b52a01ee | 32 | #include <getopt.h> |
78230c0d | 33 | #include <dirent.h> |
820fc48f | 34 | #include <sys/time.h> |
1e03b754 KS |
35 | #include <sys/prctl.h> |
36 | #include <sys/socket.h> | |
a65aa40f | 37 | #include <sys/un.h> |
1e03b754 | 38 | #include <sys/signalfd.h> |
ff2c503d | 39 | #include <sys/epoll.h> |
3210a72b | 40 | #include <sys/poll.h> |
138068d6 | 41 | #include <sys/wait.h> |
dc117daa | 42 | #include <sys/stat.h> |
c895fd00 | 43 | #include <sys/ioctl.h> |
01618658 | 44 | #include <sys/inotify.h> |
761dfddc | 45 | #include <sys/utsname.h> |
7fafc032 KS |
46 | |
47 | #include "udev.h" | |
392ef7a2 | 48 | #include "sd-daemon.h" |
7fafc032 | 49 | |
c3804728 | 50 | static bool debug; |
9e8fe79b | 51 | |
80df994c | 52 | void udev_main_log(struct udev *udev, int priority, |
7d563a17 KS |
53 | const char *file, int line, const char *fn, |
54 | const char *format, va_list args) | |
55 | { | |
56 | if (debug) { | |
820fc48f | 57 | char buf[1024]; |
29bbefe4 | 58 | struct timespec ts; |
820fc48f KS |
59 | |
60 | vsnprintf(buf, sizeof(buf), format, args); | |
29bbefe4 | 61 | clock_gettime(CLOCK_MONOTONIC, &ts); |
2dd7eed2 | 62 | fprintf(stderr, "[%llu.%06u] [%u] %s: %s", |
29bbefe4 | 63 | (unsigned long long) ts.tv_sec, (unsigned int) ts.tv_nsec/1000, |
820fc48f | 64 | (int) getpid(), fn, buf); |
7d563a17 KS |
65 | } else { |
66 | vsyslog(priority, format, args); | |
67 | } | |
68 | } | |
69 | ||
d7ddce18 | 70 | static struct udev_rules *rules; |
f503f6b2 | 71 | static struct udev_queue_export *udev_queue_export; |
d59f11e1 | 72 | static struct udev_ctrl *udev_ctrl; |
1e03b754 | 73 | static struct udev_monitor *monitor; |
3c6ee190 | 74 | static int worker_watch[2] = { -1, -1 }; |
ff2c503d KS |
75 | static int fd_signal = -1; |
76 | static int fd_ep = -1; | |
77 | static int fd_inotify = -1; | |
c3804728 | 78 | static bool stop_exec_queue; |
7c85d636 | 79 | static bool reload; |
87d55ff6 KS |
80 | static int children; |
81 | static int children_max; | |
c830e98d | 82 | static int exec_delay; |
2181d30a | 83 | static sigset_t sigmask_orig; |
ff2c503d KS |
84 | static UDEV_LIST(event_list); |
85 | static UDEV_LIST(worker_list); | |
c3804728 | 86 | static bool udev_exit; |
1e03b754 | 87 | |
1e03b754 KS |
88 | enum event_state { |
89 | EVENT_UNDEF, | |
90 | EVENT_QUEUED, | |
91 | EVENT_RUNNING, | |
92 | }; | |
93 | ||
94 | struct event { | |
95 | struct udev_list_node node; | |
96 | struct udev *udev; | |
97 | struct udev_device *dev; | |
98 | enum event_state state; | |
99 | int exitcode; | |
100 | unsigned long long int delaying_seqnum; | |
101 | unsigned long long int seqnum; | |
102 | const char *devpath; | |
103 | size_t devpath_len; | |
104 | const char *devpath_old; | |
19711e19 KS |
105 | dev_t devnum; |
106 | bool is_block; | |
fc416258 | 107 | int ifindex; |
1e03b754 KS |
108 | }; |
109 | ||
110 | static struct event *node_to_event(struct udev_list_node *node) | |
7e027927 KS |
111 | { |
112 | char *event; | |
113 | ||
114 | event = (char *)node; | |
1e03b754 KS |
115 | event -= offsetof(struct event, node); |
116 | return (struct event *)event; | |
117 | } | |
118 | ||
ff2c503d KS |
119 | static void event_queue_cleanup(struct udev *udev, enum event_state type); |
120 | ||
1e03b754 KS |
121 | enum worker_state { |
122 | WORKER_UNDEF, | |
123 | WORKER_RUNNING, | |
124 | WORKER_IDLE, | |
125 | WORKER_KILLED, | |
126 | }; | |
127 | ||
128 | struct worker { | |
129 | struct udev_list_node node; | |
bc113de9 KS |
130 | struct udev *udev; |
131 | int refcount; | |
1e03b754 KS |
132 | pid_t pid; |
133 | struct udev_monitor *monitor; | |
134 | enum worker_state state; | |
135 | struct event *event; | |
136 | }; | |
137 | ||
138 | /* passed from worker to main process */ | |
139 | struct worker_message { | |
140 | pid_t pid; | |
141 | int exitcode; | |
142 | }; | |
143 | ||
144 | static struct worker *node_to_worker(struct udev_list_node *node) | |
145 | { | |
146 | char *worker; | |
147 | ||
148 | worker = (char *)node; | |
149 | worker -= offsetof(struct worker, node); | |
150 | return (struct worker *)worker; | |
7e027927 KS |
151 | } |
152 | ||
ff2c503d | 153 | static void event_queue_delete(struct event *event, bool export) |
fc465079 | 154 | { |
7e027927 | 155 | udev_list_node_remove(&event->node); |
7a770250 | 156 | |
ff2c503d | 157 | if (export) { |
289a1821 | 158 | udev_queue_export_device_finished(udev_queue_export, event->dev); |
ff2c503d KS |
159 | info(event->udev, "seq %llu done with %i\n", udev_device_get_seqnum(event->dev), event->exitcode); |
160 | } | |
aa8734ff | 161 | udev_device_unref(event->dev); |
1e03b754 | 162 | free(event); |
aa8734ff | 163 | } |
7a770250 | 164 | |
bc113de9 KS |
165 | static struct worker *worker_ref(struct worker *worker) |
166 | { | |
167 | worker->refcount++; | |
168 | return worker; | |
169 | } | |
170 | ||
ff2c503d KS |
171 | static void worker_cleanup(struct worker *worker) |
172 | { | |
173 | udev_list_node_remove(&worker->node); | |
174 | udev_monitor_unref(worker->monitor); | |
175 | children--; | |
176 | free(worker); | |
177 | } | |
178 | ||
1e03b754 KS |
179 | static void worker_unref(struct worker *worker) |
180 | { | |
bc113de9 KS |
181 | worker->refcount--; |
182 | if (worker->refcount > 0) | |
183 | return; | |
bc113de9 | 184 | info(worker->udev, "worker [%u] cleaned up\n", worker->pid); |
ff2c503d KS |
185 | worker_cleanup(worker); |
186 | } | |
187 | ||
188 | static void worker_list_cleanup(struct udev *udev) | |
189 | { | |
190 | struct udev_list_node *loop, *tmp; | |
191 | ||
192 | udev_list_node_foreach_safe(loop, tmp, &worker_list) { | |
193 | struct worker *worker = node_to_worker(loop); | |
194 | ||
195 | worker_cleanup(worker); | |
196 | } | |
fc465079 KS |
197 | } |
198 | ||
1e03b754 | 199 | static void worker_new(struct event *event) |
7fafc032 | 200 | { |
ff2c503d | 201 | struct udev *udev = event->udev; |
1e03b754 KS |
202 | struct worker *worker; |
203 | struct udev_monitor *worker_monitor; | |
90c210eb | 204 | pid_t pid; |
ce449f89 | 205 | |
1e03b754 | 206 | /* listen for new events */ |
ff2c503d | 207 | worker_monitor = udev_monitor_new_from_netlink(udev, NULL); |
1e03b754 KS |
208 | if (worker_monitor == NULL) |
209 | return; | |
210 | /* allow the main daemon netlink address to send devices to the worker */ | |
211 | udev_monitor_allow_unicast_sender(worker_monitor, monitor); | |
212 | udev_monitor_enable_receiving(worker_monitor); | |
213 | ||
214 | worker = calloc(1, sizeof(struct worker)); | |
1851332c YK |
215 | if (worker == NULL) { |
216 | udev_monitor_unref(worker_monitor); | |
1e03b754 | 217 | return; |
1851332c | 218 | } |
bc113de9 KS |
219 | /* worker + event reference */ |
220 | worker->refcount = 2; | |
ff2c503d | 221 | worker->udev = udev; |
0bc74ea7 | 222 | |
90c210eb KS |
223 | pid = fork(); |
224 | switch (pid) { | |
1e03b754 | 225 | case 0: { |
82063a88 KS |
226 | struct udev_device *dev = NULL; |
227 | int fd_monitor; | |
228 | struct epoll_event ep_signal, ep_monitor; | |
229 | sigset_t mask; | |
230 | int rc = EXIT_SUCCESS; | |
1e03b754 | 231 | |
ff2c503d KS |
232 | /* move initial device from queue */ |
233 | dev = event->dev; | |
234 | event->dev = NULL; | |
235 | ||
236 | free(worker); | |
237 | worker_list_cleanup(udev); | |
238 | event_queue_cleanup(udev, EVENT_UNDEF); | |
f503f6b2 | 239 | udev_queue_export_unref(udev_queue_export); |
9290143d | 240 | udev_monitor_unref(monitor); |
d59f11e1 | 241 | udev_ctrl_unref(udev_ctrl); |
ff2c503d KS |
242 | close(fd_signal); |
243 | close(fd_ep); | |
1e03b754 | 244 | close(worker_watch[READ_END]); |
b437ec95 | 245 | |
82063a88 KS |
246 | sigfillset(&mask); |
247 | fd_signal = signalfd(-1, &mask, SFD_NONBLOCK|SFD_CLOEXEC); | |
248 | if (fd_signal < 0) { | |
249 | err(udev, "error creating signalfd %m\n"); | |
250 | rc = 2; | |
251 | goto out; | |
252 | } | |
253 | ||
254 | fd_ep = epoll_create1(EPOLL_CLOEXEC); | |
255 | if (fd_ep < 0) { | |
256 | err(udev, "error creating epoll fd: %m\n"); | |
257 | rc = 3; | |
258 | goto out; | |
259 | } | |
260 | ||
261 | memset(&ep_signal, 0, sizeof(struct epoll_event)); | |
262 | ep_signal.events = EPOLLIN; | |
263 | ep_signal.data.fd = fd_signal; | |
264 | ||
265 | fd_monitor = udev_monitor_get_fd(worker_monitor); | |
266 | memset(&ep_monitor, 0, sizeof(struct epoll_event)); | |
267 | ep_monitor.events = EPOLLIN; | |
268 | ep_monitor.data.fd = fd_monitor; | |
269 | ||
270 | if (epoll_ctl(fd_ep, EPOLL_CTL_ADD, fd_signal, &ep_signal) < 0 || | |
271 | epoll_ctl(fd_ep, EPOLL_CTL_ADD, fd_monitor, &ep_monitor) < 0) { | |
272 | err(udev, "fail to add fds to epoll: %m\n"); | |
273 | rc = 4; | |
274 | goto out; | |
275 | } | |
aa8734ff | 276 | |
1e03b754 KS |
277 | /* request TERM signal if parent exits */ |
278 | prctl(PR_SET_PDEATHSIG, SIGTERM); | |
aa8734ff | 279 | |
82063a88 | 280 | for (;;) { |
1e03b754 | 281 | struct udev_event *udev_event; |
2181d30a | 282 | struct worker_message msg; |
2181d30a | 283 | int err; |
aa8734ff | 284 | |
ff2c503d | 285 | info(udev, "seq %llu running\n", udev_device_get_seqnum(dev)); |
1e03b754 | 286 | udev_event = udev_event_new(dev); |
82063a88 KS |
287 | if (udev_event == NULL) { |
288 | rc = 5; | |
289 | goto out; | |
290 | } | |
0bc74ea7 | 291 | |
2181d30a KS |
292 | /* needed for SIGCHLD/SIGTERM in spawn() */ |
293 | udev_event->fd_signal = fd_signal; | |
1e03b754 | 294 | |
c830e98d KS |
295 | if (exec_delay > 0) |
296 | udev_event->exec_delay = exec_delay; | |
297 | ||
1e03b754 | 298 | /* apply rules, create node, symlinks */ |
2181d30a | 299 | err = udev_event_execute_rules(udev_event, rules, &sigmask_orig); |
1e03b754 | 300 | |
f46d2e54 | 301 | if (err == 0) |
289a1821 | 302 | udev_event_execute_run(udev_event, &sigmask_orig); |
1e03b754 KS |
303 | |
304 | /* apply/restore inotify watch */ | |
305 | if (err == 0 && udev_event->inotify_watch) { | |
ff2c503d | 306 | udev_watch_begin(udev, dev); |
1e03b754 KS |
307 | udev_device_update_db(dev); |
308 | } | |
5ae82640 | 309 | |
1e03b754 KS |
310 | /* send processed event back to libudev listeners */ |
311 | udev_monitor_send_device(worker_monitor, NULL, dev); | |
11625409 | 312 | |
f46d2e54 | 313 | /* send udevd the result of the event execution */ |
2181d30a | 314 | memset(&msg, 0, sizeof(struct worker_message)); |
f7c5b04f KS |
315 | if (err != 0) |
316 | msg.exitcode = err; | |
1e03b754 KS |
317 | msg.pid = getpid(); |
318 | send(worker_watch[WRITE_END], &msg, sizeof(struct worker_message), 0); | |
319 | ||
ff2c503d | 320 | info(udev, "seq %llu processed with %i\n", udev_device_get_seqnum(dev), err); |
2181d30a | 321 | |
adda4c68 KS |
322 | udev_device_unref(dev); |
323 | dev = NULL; | |
324 | ||
2181d30a KS |
325 | if (udev_event->sigterm) { |
326 | udev_event_unref(udev_event); | |
327 | goto out; | |
328 | } | |
329 | ||
330 | udev_event_unref(udev_event); | |
331 | ||
82063a88 KS |
332 | /* wait for more device messages from main udevd, or term signal */ |
333 | while (dev == NULL) { | |
334 | struct epoll_event ev[4]; | |
adda4c68 | 335 | int fdcount; |
82063a88 | 336 | int i; |
adda4c68 | 337 | |
82063a88 | 338 | fdcount = epoll_wait(fd_ep, ev, ARRAY_SIZE(ev), -1); |
2181d30a KS |
339 | if (fdcount < 0) { |
340 | if (errno == EINTR) | |
341 | continue; | |
342 | err = -errno; | |
343 | err(udev, "failed to poll: %m\n"); | |
344 | goto out; | |
345 | } | |
adda4c68 | 346 | |
82063a88 KS |
347 | for (i = 0; i < fdcount; i++) { |
348 | if (ev[i].data.fd == fd_monitor && ev[i].events & EPOLLIN) { | |
349 | dev = udev_monitor_receive_device(worker_monitor); | |
7944a13a | 350 | break; |
82063a88 KS |
351 | } else if (ev[i].data.fd == fd_signal && ev[i].events & EPOLLIN) { |
352 | struct signalfd_siginfo fdsi; | |
353 | ssize_t size; | |
354 | ||
355 | size = read(fd_signal, &fdsi, sizeof(struct signalfd_siginfo)); | |
356 | if (size != sizeof(struct signalfd_siginfo)) | |
357 | continue; | |
358 | switch (fdsi.ssi_signo) { | |
359 | case SIGTERM: | |
360 | goto out; | |
82063a88 KS |
361 | } |
362 | } | |
adda4c68 KS |
363 | } |
364 | } | |
82063a88 KS |
365 | } |
366 | out: | |
367 | udev_device_unref(dev); | |
368 | if (fd_signal >= 0) | |
369 | close(fd_signal); | |
370 | if (fd_ep >= 0) | |
371 | close(fd_ep); | |
ff2c503d KS |
372 | close(fd_inotify); |
373 | close(worker_watch[WRITE_END]); | |
374 | udev_rules_unref(rules); | |
1e03b754 | 375 | udev_monitor_unref(worker_monitor); |
ff2c503d | 376 | udev_unref(udev); |
9060b066 | 377 | udev_log_close(); |
82063a88 | 378 | exit(rc); |
1e03b754 | 379 | } |
90c210eb | 380 | case -1: |
1e03b754 KS |
381 | udev_monitor_unref(worker_monitor); |
382 | event->state = EVENT_QUEUED; | |
383 | free(worker); | |
ff2c503d | 384 | err(udev, "fork of child failed: %m\n"); |
2f6cbd19 | 385 | break; |
90c210eb | 386 | default: |
1e03b754 KS |
387 | /* close monitor, but keep address around */ |
388 | udev_monitor_disconnect(worker_monitor); | |
389 | worker->monitor = worker_monitor; | |
390 | worker->pid = pid; | |
391 | worker->state = WORKER_RUNNING; | |
392 | worker->event = event; | |
393 | event->state = EVENT_RUNNING; | |
394 | udev_list_node_append(&worker->node, &worker_list); | |
87d55ff6 | 395 | children++; |
ff2c503d | 396 | info(udev, "seq %llu forked new worker [%u]\n", udev_device_get_seqnum(event->dev), pid); |
1e03b754 | 397 | break; |
90c210eb | 398 | } |
7fafc032 KS |
399 | } |
400 | ||
57c6f8ae | 401 | static void event_run(struct event *event) |
fc465079 | 402 | { |
1e03b754 KS |
403 | struct udev_list_node *loop; |
404 | ||
405 | udev_list_node_foreach(loop, &worker_list) { | |
406 | struct worker *worker = node_to_worker(loop); | |
407 | ssize_t count; | |
7baada47 | 408 | |
1e03b754 KS |
409 | if (worker->state != WORKER_IDLE) |
410 | continue; | |
0f624f16 | 411 | |
1e03b754 KS |
412 | count = udev_monitor_send_device(monitor, worker->monitor, event->dev); |
413 | if (count < 0) { | |
a073cfa8 | 414 | err(event->udev, "worker [%u] did not accept message %zi (%m), kill it\n", worker->pid, count); |
1e03b754 | 415 | kill(worker->pid, SIGKILL); |
bc113de9 | 416 | worker->state = WORKER_KILLED; |
1e03b754 KS |
417 | continue; |
418 | } | |
bc113de9 KS |
419 | worker_ref(worker); |
420 | worker->event = event; | |
421 | worker->state = WORKER_RUNNING; | |
422 | event->state = EVENT_RUNNING; | |
1e03b754 KS |
423 | return; |
424 | } | |
425 | ||
57c6f8ae | 426 | if (children >= children_max) { |
c830e98d KS |
427 | if (children_max > 1) |
428 | info(event->udev, "maximum number (%i) of children reached\n", children); | |
1e03b754 KS |
429 | return; |
430 | } | |
431 | ||
432 | /* start new worker and pass initial device */ | |
433 | worker_new(event); | |
434 | } | |
435 | ||
40929a02 | 436 | static int event_queue_insert(struct udev_device *dev) |
1e03b754 KS |
437 | { |
438 | struct event *event; | |
439 | ||
440 | event = calloc(1, sizeof(struct event)); | |
441 | if (event == NULL) | |
40929a02 | 442 | return -1; |
1e03b754 KS |
443 | |
444 | event->udev = udev_device_get_udev(dev); | |
445 | event->dev = dev; | |
446 | event->seqnum = udev_device_get_seqnum(dev); | |
447 | event->devpath = udev_device_get_devpath(dev); | |
448 | event->devpath_len = strlen(event->devpath); | |
449 | event->devpath_old = udev_device_get_devpath_old(dev); | |
19711e19 KS |
450 | event->devnum = udev_device_get_devnum(dev); |
451 | event->is_block = (strcmp("block", udev_device_get_subsystem(dev)) == 0); | |
fc416258 | 452 | event->ifindex = udev_device_get_ifindex(dev); |
1e03b754 KS |
453 | |
454 | udev_queue_export_device_queued(udev_queue_export, dev); | |
455 | info(event->udev, "seq %llu queued, '%s' '%s'\n", udev_device_get_seqnum(dev), | |
456 | udev_device_get_action(dev), udev_device_get_subsystem(dev)); | |
457 | ||
458 | event->state = EVENT_QUEUED; | |
0bc74ea7 | 459 | udev_list_node_append(&event->node, &event_list); |
40929a02 | 460 | return 0; |
fc465079 KS |
461 | } |
462 | ||
adda4c68 | 463 | static void worker_kill(struct udev *udev, int retain) |
1e03b754 KS |
464 | { |
465 | struct udev_list_node *loop; | |
466 | int max; | |
467 | ||
87d55ff6 | 468 | if (children <= retain) |
1e03b754 KS |
469 | return; |
470 | ||
87d55ff6 | 471 | max = children - retain; |
1e03b754 KS |
472 | |
473 | udev_list_node_foreach(loop, &worker_list) { | |
474 | struct worker *worker = node_to_worker(loop); | |
475 | ||
476 | if (max-- <= 0) | |
477 | break; | |
478 | ||
479 | if (worker->state == WORKER_KILLED) | |
480 | continue; | |
481 | ||
482 | worker->state = WORKER_KILLED; | |
483 | kill(worker->pid, SIGTERM); | |
484 | } | |
485 | } | |
486 | ||
e3196993 | 487 | /* lookup event for identical, parent, child device */ |
19711e19 | 488 | static bool is_devpath_busy(struct event *event) |
7fafc032 | 489 | { |
7e027927 | 490 | struct udev_list_node *loop; |
1e03b754 | 491 | size_t common; |
7b6571a9 | 492 | |
0bc74ea7 KS |
493 | /* check if queue contains events we depend on */ |
494 | udev_list_node_foreach(loop, &event_list) { | |
1e03b754 | 495 | struct event *loop_event = node_to_event(loop); |
7e027927 | 496 | |
0bc74ea7 | 497 | /* we already found a later event, earlier can not block us, no need to check again */ |
1e03b754 | 498 | if (loop_event->seqnum < event->delaying_seqnum) |
0bc74ea7 KS |
499 | continue; |
500 | ||
501 | /* event we checked earlier still exists, no need to check again */ | |
1e03b754 | 502 | if (loop_event->seqnum == event->delaying_seqnum) |
19711e19 | 503 | return true; |
0bc74ea7 KS |
504 | |
505 | /* found ourself, no later event can block us */ | |
1e03b754 | 506 | if (loop_event->seqnum >= event->seqnum) |
fc630eda KS |
507 | break; |
508 | ||
19711e19 KS |
509 | /* check major/minor */ |
510 | if (major(event->devnum) != 0 && event->devnum == loop_event->devnum && event->is_block == loop_event->is_block) | |
511 | return true; | |
512 | ||
fc416258 KS |
513 | /* check network device ifindex */ |
514 | if (event->ifindex != 0 && event->ifindex == loop_event->ifindex) | |
515 | return true; | |
516 | ||
a2f2270e | 517 | /* check our old name */ |
19711e19 KS |
518 | if (event->devpath_old != NULL && strcmp(loop_event->devpath, event->devpath_old) == 0) { |
519 | event->delaying_seqnum = loop_event->seqnum; | |
520 | return true; | |
521 | } | |
a2f2270e | 522 | |
1e03b754 KS |
523 | /* compare devpath */ |
524 | common = MIN(loop_event->devpath_len, event->devpath_len); | |
525 | ||
526 | /* one devpath is contained in the other? */ | |
527 | if (memcmp(loop_event->devpath, event->devpath, common) != 0) | |
528 | continue; | |
529 | ||
530 | /* identical device event found */ | |
531 | if (loop_event->devpath_len == event->devpath_len) { | |
fc416258 KS |
532 | /* devices names might have changed/swapped in the meantime */ |
533 | if (major(event->devnum) != 0 && (event->devnum != loop_event->devnum || event->is_block != loop_event->is_block)) | |
534 | continue; | |
535 | if (event->ifindex != 0 && event->ifindex != loop_event->ifindex) | |
536 | continue; | |
1e03b754 | 537 | event->delaying_seqnum = loop_event->seqnum; |
19711e19 | 538 | return true; |
c3b145a3 | 539 | } |
1e03b754 KS |
540 | |
541 | /* parent device event found */ | |
542 | if (event->devpath[common] == '/') { | |
543 | event->delaying_seqnum = loop_event->seqnum; | |
19711e19 | 544 | return true; |
1e03b754 KS |
545 | } |
546 | ||
547 | /* child device event found */ | |
548 | if (loop_event->devpath[common] == '/') { | |
549 | event->delaying_seqnum = loop_event->seqnum; | |
19711e19 | 550 | return true; |
1e03b754 KS |
551 | } |
552 | ||
553 | /* no matching device */ | |
554 | continue; | |
80513ea3 | 555 | } |
1e03b754 | 556 | |
19711e19 | 557 | return false; |
7fafc032 KS |
558 | } |
559 | ||
ff2c503d | 560 | static void event_queue_start(struct udev *udev) |
7fafc032 | 561 | { |
7e027927 | 562 | struct udev_list_node *loop; |
8ab44e3f | 563 | |
1e03b754 KS |
564 | udev_list_node_foreach(loop, &event_list) { |
565 | struct event *event = node_to_event(loop); | |
0bc74ea7 | 566 | |
1e03b754 | 567 | if (event->state != EVENT_QUEUED) |
0bc74ea7 KS |
568 | continue; |
569 | ||
570 | /* do not start event if parent or child event is still running */ | |
19711e19 | 571 | if (is_devpath_busy(event)) { |
1e03b754 | 572 | dbg(udev, "delay seq %llu (%s)\n", event->seqnum, event->devpath); |
fc465079 KS |
573 | continue; |
574 | } | |
575 | ||
57c6f8ae | 576 | event_run(event); |
1e03b754 KS |
577 | } |
578 | } | |
579 | ||
ff2c503d KS |
580 | static void event_queue_cleanup(struct udev *udev, enum event_state match_type) |
581 | { | |
582 | struct udev_list_node *loop, *tmp; | |
583 | ||
584 | udev_list_node_foreach_safe(loop, tmp, &event_list) { | |
585 | struct event *event = node_to_event(loop); | |
586 | ||
587 | if (match_type != EVENT_UNDEF && match_type != event->state) | |
588 | continue; | |
589 | ||
590 | event_queue_delete(event, false); | |
591 | } | |
592 | } | |
593 | ||
594 | static void worker_returned(int fd_worker) | |
1e03b754 | 595 | { |
88cbfb09 | 596 | for (;;) { |
1e03b754 KS |
597 | struct worker_message msg; |
598 | ssize_t size; | |
599 | struct udev_list_node *loop; | |
600 | ||
ff2c503d | 601 | size = recv(fd_worker, &msg, sizeof(struct worker_message), MSG_DONTWAIT); |
1e03b754 KS |
602 | if (size != sizeof(struct worker_message)) |
603 | break; | |
604 | ||
605 | /* lookup worker who sent the signal */ | |
606 | udev_list_node_foreach(loop, &worker_list) { | |
607 | struct worker *worker = node_to_worker(loop); | |
d1cc6562 | 608 | |
1e03b754 KS |
609 | if (worker->pid != msg.pid) |
610 | continue; | |
611 | ||
612 | /* worker returned */ | |
613 | worker->event->exitcode = msg.exitcode; | |
ff2c503d | 614 | event_queue_delete(worker->event, true); |
1e03b754 | 615 | worker->event = NULL; |
adda4c68 KS |
616 | if (worker->state != WORKER_KILLED) |
617 | worker->state = WORKER_IDLE; | |
bc113de9 | 618 | worker_unref(worker); |
1e03b754 | 619 | break; |
d1cc6562 | 620 | } |
e825b59b | 621 | } |
88f4b648 KS |
622 | } |
623 | ||
3b47c739 | 624 | /* receive the udevd message from userspace */ |
ff2c503d | 625 | static struct udev_ctrl_connection *handle_ctrl_msg(struct udev_ctrl *uctrl) |
7fafc032 | 626 | { |
d59f11e1 | 627 | struct udev *udev = udev_ctrl_get_udev(uctrl); |
ff2c503d KS |
628 | struct udev_ctrl_connection *ctrl_conn; |
629 | struct udev_ctrl_msg *ctrl_msg = NULL; | |
d59f11e1 KS |
630 | const char *str; |
631 | int i; | |
7b1cbec9 | 632 | |
ff2c503d KS |
633 | ctrl_conn = udev_ctrl_get_connection(uctrl); |
634 | if (ctrl_conn == NULL) | |
635 | goto out; | |
636 | ||
637 | ctrl_msg = udev_ctrl_receive_msg(ctrl_conn); | |
d59f11e1 | 638 | if (ctrl_msg == NULL) |
ff2c503d | 639 | goto out; |
4a231017 | 640 | |
d59f11e1 KS |
641 | i = udev_ctrl_get_set_log_level(ctrl_msg); |
642 | if (i >= 0) { | |
643 | info(udev, "udevd message (SET_LOG_PRIORITY) received, log_priority=%i\n", i); | |
644 | udev_set_log_priority(udev, i); | |
adda4c68 | 645 | worker_kill(udev, 0); |
0028653c KS |
646 | } |
647 | ||
d59f11e1 | 648 | if (udev_ctrl_get_stop_exec_queue(ctrl_msg) > 0) { |
7d563a17 | 649 | info(udev, "udevd message (STOP_EXEC_QUEUE) received\n"); |
c3804728 | 650 | stop_exec_queue = true; |
d59f11e1 KS |
651 | } |
652 | ||
653 | if (udev_ctrl_get_start_exec_queue(ctrl_msg) > 0) { | |
7d563a17 | 654 | info(udev, "udevd message (START_EXEC_QUEUE) received\n"); |
c3804728 | 655 | stop_exec_queue = false; |
d59f11e1 KS |
656 | } |
657 | ||
7c85d636 KS |
658 | if (udev_ctrl_get_reload(ctrl_msg) > 0) { |
659 | info(udev, "udevd message (RELOAD) received\n"); | |
660 | reload = true; | |
3b47c739 | 661 | } |
d59f11e1 KS |
662 | |
663 | str = udev_ctrl_get_set_env(ctrl_msg); | |
664 | if (str != NULL) { | |
aa8734ff KS |
665 | char *key; |
666 | ||
667 | key = strdup(str); | |
668 | if (key != NULL) { | |
669 | char *val; | |
670 | ||
671 | val = strchr(key, '='); | |
672 | if (val != NULL) { | |
673 | val[0] = '\0'; | |
674 | val = &val[1]; | |
675 | if (val[0] == '\0') { | |
676 | info(udev, "udevd message (ENV) received, unset '%s'\n", key); | |
677 | udev_add_property(udev, key, NULL); | |
678 | } else { | |
679 | info(udev, "udevd message (ENV) received, set '%s=%s'\n", key, val); | |
680 | udev_add_property(udev, key, val); | |
681 | } | |
d59f11e1 | 682 | } else { |
aa8734ff | 683 | err(udev, "wrong key format '%s'\n", key); |
d59f11e1 | 684 | } |
aa8734ff | 685 | free(key); |
d59f11e1 | 686 | } |
adda4c68 | 687 | worker_kill(udev, 0); |
d59f11e1 KS |
688 | } |
689 | ||
87d55ff6 | 690 | i = udev_ctrl_get_set_children_max(ctrl_msg); |
d59f11e1 | 691 | if (i >= 0) { |
87d55ff6 KS |
692 | info(udev, "udevd message (SET_MAX_CHILDREN) received, children_max=%i\n", i); |
693 | children_max = i; | |
d59f11e1 | 694 | } |
bb38678e | 695 | |
ff2c503d KS |
696 | if (udev_ctrl_get_ping(ctrl_msg) > 0) |
697 | info(udev, "udevd message (SYNC) received\n"); | |
698 | ||
699 | if (udev_ctrl_get_exit(ctrl_msg) > 0) { | |
700 | info(udev, "udevd message (EXIT) received\n"); | |
701 | udev_exit = true; | |
702 | /* keep reference to block the client until we exit */ | |
703 | udev_ctrl_connection_ref(ctrl_conn); | |
bb38678e | 704 | } |
ff2c503d | 705 | out: |
d59f11e1 | 706 | udev_ctrl_msg_unref(ctrl_msg); |
ff2c503d | 707 | return udev_ctrl_connection_unref(ctrl_conn); |
88f4b648 | 708 | } |
4a231017 | 709 | |
bd284db1 SJR |
710 | /* read inotify messages */ |
711 | static int handle_inotify(struct udev *udev) | |
712 | { | |
4daa146b | 713 | int nbytes, pos; |
bd284db1 SJR |
714 | char *buf; |
715 | struct inotify_event *ev; | |
bd284db1 | 716 | |
ff2c503d | 717 | if ((ioctl(fd_inotify, FIONREAD, &nbytes) < 0) || (nbytes <= 0)) |
bd284db1 SJR |
718 | return 0; |
719 | ||
720 | buf = malloc(nbytes); | |
721 | if (buf == NULL) { | |
45798927 | 722 | err(udev, "error getting buffer for inotify\n"); |
1e03b754 | 723 | return -1; |
bd284db1 SJR |
724 | } |
725 | ||
ff2c503d | 726 | nbytes = read(fd_inotify, buf, nbytes); |
bd284db1 | 727 | |
80be8c48 | 728 | for (pos = 0; pos < nbytes; pos += sizeof(struct inotify_event) + ev->len) { |
047f88bc | 729 | struct udev_device *dev; |
bd284db1 | 730 | |
80be8c48 | 731 | ev = (struct inotify_event *)(buf + pos); |
047f88bc SJR |
732 | dev = udev_watch_lookup(udev, ev->wd); |
733 | if (dev != NULL) { | |
79e1912b | 734 | info(udev, "inotify event: %x for %s\n", ev->mask, udev_device_get_devnode(dev)); |
bd284db1 SJR |
735 | if (ev->mask & IN_CLOSE_WRITE) { |
736 | char filename[UTIL_PATH_SIZE]; | |
737 | int fd; | |
738 | ||
047f88bc | 739 | info(udev, "device %s closed, synthesising 'change'\n", udev_device_get_devnode(dev)); |
065db052 | 740 | util_strscpyl(filename, sizeof(filename), udev_device_get_syspath(dev), "/uevent", NULL); |
bd284db1 | 741 | fd = open(filename, O_WRONLY); |
e48e2912 KS |
742 | if (fd >= 0) { |
743 | if (write(fd, "change", 6) < 0) | |
744 | info(udev, "error writing uevent: %m\n"); | |
745 | close(fd); | |
746 | } | |
bd284db1 SJR |
747 | } |
748 | if (ev->mask & IN_IGNORED) | |
047f88bc SJR |
749 | udev_watch_end(udev, dev); |
750 | ||
751 | udev_device_unref(dev); | |
bd284db1 | 752 | } |
b8e96d67 | 753 | |
bd284db1 SJR |
754 | } |
755 | ||
1e03b754 | 756 | free(buf); |
4aca304e | 757 | return 0; |
bd284db1 SJR |
758 | } |
759 | ||
45798927 | 760 | static void handle_signal(struct udev *udev, int signo) |
7fafc032 | 761 | { |
1e03b754 KS |
762 | switch (signo) { |
763 | case SIGINT: | |
764 | case SIGTERM: | |
c3804728 | 765 | udev_exit = true; |
1e03b754 KS |
766 | break; |
767 | case SIGCHLD: | |
88cbfb09 | 768 | for (;;) { |
1e03b754 | 769 | pid_t pid; |
45798927 | 770 | int status; |
1e03b754 | 771 | struct udev_list_node *loop, *tmp; |
5a73b25f | 772 | |
45798927 | 773 | pid = waitpid(-1, &status, WNOHANG); |
1e03b754 KS |
774 | if (pid <= 0) |
775 | break; | |
7fafc032 | 776 | |
1e03b754 KS |
777 | udev_list_node_foreach_safe(loop, tmp, &worker_list) { |
778 | struct worker *worker = node_to_worker(loop); | |
7e027927 | 779 | |
1e03b754 KS |
780 | if (worker->pid != pid) |
781 | continue; | |
bc113de9 | 782 | info(udev, "worker [%u] exit\n", pid); |
b466e9ab | 783 | |
a95f0385 KS |
784 | if (WIFEXITED(status)) { |
785 | if (WEXITSTATUS(status) != 0) | |
786 | err(udev, "worker [%u] exit with return code %i\n", pid, WEXITSTATUS(status)); | |
787 | } else if (WIFSIGNALED(status)) { | |
788 | err(udev, "worker [%u] terminated by signal %i (%s)\n", | |
789 | pid, WTERMSIG(status), strsignal(WTERMSIG(status))); | |
790 | } else if (WIFSTOPPED(status)) { | |
791 | err(udev, "worker [%u] stopped\n", pid); | |
792 | } else if (WIFCONTINUED(status)) { | |
793 | err(udev, "worker [%u] continued\n", pid); | |
794 | } else { | |
795 | err(udev, "worker [%u] exit with status 0x%04x\n", pid, status); | |
796 | } | |
797 | ||
798 | if (!WIFEXITED(status) || WEXITSTATUS(status) != 0) { | |
bc113de9 | 799 | if (worker->event != NULL) { |
a95f0385 KS |
800 | err(udev, "worker [%u] failed while handling '%s'\n", |
801 | pid, worker->event->devpath); | |
bc113de9 | 802 | worker->event->exitcode = -32; |
ff2c503d | 803 | event_queue_delete(worker->event, true); |
a95f0385 | 804 | /* drop reference taken for state 'running' */ |
bc113de9 KS |
805 | worker_unref(worker); |
806 | } | |
1e03b754 | 807 | } |
1e03b754 | 808 | worker_unref(worker); |
1e03b754 KS |
809 | break; |
810 | } | |
811 | } | |
812 | break; | |
813 | case SIGHUP: | |
7c85d636 | 814 | reload = true; |
1e03b754 | 815 | break; |
f27125f9 | 816 | } |
817 | } | |
818 | ||
761dfddc KS |
819 | static void static_dev_create_from_modules(struct udev *udev) |
820 | { | |
821 | struct utsname kernel; | |
822 | char modules[UTIL_PATH_SIZE]; | |
823 | char buf[4096]; | |
824 | FILE *f; | |
825 | ||
826 | uname(&kernel); | |
827 | util_strscpyl(modules, sizeof(modules), "/lib/modules/", kernel.release, "/modules.devname", NULL); | |
828 | f = fopen(modules, "r"); | |
829 | if (f == NULL) | |
830 | return; | |
831 | ||
832 | while (fgets(buf, sizeof(buf), f) != NULL) { | |
833 | char *s; | |
834 | const char *modname; | |
835 | const char *devname; | |
836 | const char *devno; | |
837 | int maj, min; | |
838 | char type; | |
839 | mode_t mode; | |
840 | char filename[UTIL_PATH_SIZE]; | |
841 | ||
842 | if (buf[0] == '#') | |
843 | continue; | |
844 | ||
845 | modname = buf; | |
846 | s = strchr(modname, ' '); | |
847 | if (s == NULL) | |
848 | continue; | |
849 | s[0] = '\0'; | |
850 | ||
851 | devname = &s[1]; | |
852 | s = strchr(devname, ' '); | |
853 | if (s == NULL) | |
854 | continue; | |
855 | s[0] = '\0'; | |
856 | ||
857 | devno = &s[1]; | |
858 | s = strchr(devno, ' '); | |
859 | if (s == NULL) | |
860 | s = strchr(devno, '\n'); | |
861 | if (s != NULL) | |
862 | s[0] = '\0'; | |
863 | if (sscanf(devno, "%c%u:%u", &type, &maj, &min) != 3) | |
864 | continue; | |
865 | ||
866 | if (type == 'c') | |
220893b3 | 867 | mode = S_IFCHR; |
761dfddc | 868 | else if (type == 'b') |
220893b3 | 869 | mode = S_IFBLK; |
761dfddc KS |
870 | else |
871 | continue; | |
872 | ||
873 | util_strscpyl(filename, sizeof(filename), udev_get_dev_path(udev), "/", devname, NULL); | |
51f43b53 | 874 | util_create_path_selinux(udev, filename); |
761dfddc KS |
875 | udev_selinux_setfscreatecon(udev, filename, mode); |
876 | info(udev, "mknod '%s' %c%u:%u\n", filename, type, maj, min); | |
877 | if (mknod(filename, mode, makedev(maj, min)) < 0 && errno == EEXIST) | |
878 | utimensat(AT_FDCWD, filename, NULL, 0); | |
879 | udev_selinux_resetfscreatecon(udev); | |
880 | } | |
881 | ||
882 | fclose(f); | |
883 | } | |
884 | ||
51f43b53 | 885 | static int copy_dev_dir(struct udev *udev, DIR *dir_from, DIR *dir_to, int maxdepth) |
cb9a0eee KS |
886 | { |
887 | struct dirent *dent; | |
888 | ||
889 | for (dent = readdir(dir_from); dent != NULL; dent = readdir(dir_from)) { | |
890 | struct stat stats; | |
891 | ||
892 | if (dent->d_name[0] == '.') | |
893 | continue; | |
894 | if (fstatat(dirfd(dir_from), dent->d_name, &stats, AT_SYMLINK_NOFOLLOW) != 0) | |
895 | continue; | |
896 | ||
897 | if (S_ISBLK(stats.st_mode) || S_ISCHR(stats.st_mode)) { | |
898 | udev_selinux_setfscreateconat(udev, dirfd(dir_to), dent->d_name, stats.st_mode & 0777); | |
899 | if (mknodat(dirfd(dir_to), dent->d_name, stats.st_mode, stats.st_rdev) == 0) { | |
900 | fchmodat(dirfd(dir_to), dent->d_name, stats.st_mode & 0777, 0); | |
901 | fchownat(dirfd(dir_to), dent->d_name, stats.st_uid, stats.st_gid, 0); | |
902 | } else { | |
903 | utimensat(dirfd(dir_to), dent->d_name, NULL, 0); | |
904 | } | |
905 | udev_selinux_resetfscreatecon(udev); | |
906 | } else if (S_ISLNK(stats.st_mode)) { | |
907 | char target[UTIL_PATH_SIZE]; | |
908 | ssize_t len; | |
909 | ||
910 | len = readlinkat(dirfd(dir_from), dent->d_name, target, sizeof(target)); | |
911 | if (len <= 0 || len == (ssize_t)sizeof(target)) | |
912 | continue; | |
913 | target[len] = '\0'; | |
914 | udev_selinux_setfscreateconat(udev, dirfd(dir_to), dent->d_name, S_IFLNK); | |
915 | if (symlinkat(target, dirfd(dir_to), dent->d_name) < 0 && errno == EEXIST) | |
916 | utimensat(dirfd(dir_to), dent->d_name, NULL, AT_SYMLINK_NOFOLLOW); | |
917 | udev_selinux_resetfscreatecon(udev); | |
918 | } else if (S_ISDIR(stats.st_mode)) { | |
919 | DIR *dir2_from, *dir2_to; | |
920 | ||
921 | if (maxdepth == 0) | |
922 | continue; | |
923 | ||
924 | udev_selinux_setfscreateconat(udev, dirfd(dir_to), dent->d_name, S_IFDIR|0755); | |
925 | mkdirat(dirfd(dir_to), dent->d_name, 0755); | |
926 | udev_selinux_resetfscreatecon(udev); | |
927 | ||
928 | dir2_to = fdopendir(openat(dirfd(dir_to), dent->d_name, O_RDONLY|O_NONBLOCK|O_DIRECTORY|O_CLOEXEC)); | |
929 | if (dir2_to == NULL) | |
930 | continue; | |
931 | ||
932 | dir2_from = fdopendir(openat(dirfd(dir_from), dent->d_name, O_RDONLY|O_NONBLOCK|O_DIRECTORY|O_CLOEXEC)); | |
933 | if (dir2_from == NULL) { | |
934 | closedir(dir2_to); | |
935 | continue; | |
936 | } | |
937 | ||
51f43b53 | 938 | copy_dev_dir(udev, dir2_from, dir2_to, maxdepth-1); |
cb9a0eee KS |
939 | |
940 | closedir(dir2_to); | |
941 | closedir(dir2_from); | |
942 | } | |
943 | } | |
944 | ||
945 | return 0; | |
946 | } | |
947 | ||
761dfddc | 948 | static void static_dev_create_links(struct udev *udev, DIR *dir) |
cb9a0eee KS |
949 | { |
950 | struct stdlinks { | |
951 | const char *link; | |
952 | const char *target; | |
953 | }; | |
954 | static const struct stdlinks stdlinks[] = { | |
955 | { "core", "/proc/kcore" }, | |
4bfa5cf5 | 956 | { "fd", "/proc/self/fd" }, |
cb9a0eee KS |
957 | { "stdin", "/proc/self/fd/0" }, |
958 | { "stdout", "/proc/self/fd/1" }, | |
959 | { "stderr", "/proc/self/fd/2" }, | |
960 | }; | |
961 | unsigned int i; | |
cb9a0eee | 962 | |
cb9a0eee | 963 | for (i = 0; i < ARRAY_SIZE(stdlinks); i++) { |
08f11597 YK |
964 | struct stat sb; |
965 | ||
966 | if (stat(stdlinks[i].target, &sb) == 0) { | |
967 | udev_selinux_setfscreateconat(udev, dirfd(dir), stdlinks[i].link, S_IFLNK); | |
968 | if (symlinkat(stdlinks[i].target, dirfd(dir), stdlinks[i].link) < 0 && errno == EEXIST) | |
969 | utimensat(dirfd(dir), stdlinks[i].link, NULL, AT_SYMLINK_NOFOLLOW); | |
970 | udev_selinux_resetfscreatecon(udev); | |
971 | } | |
cb9a0eee | 972 | } |
761dfddc KS |
973 | } |
974 | ||
975 | static void static_dev_create_from_devices(struct udev *udev, DIR *dir) | |
976 | { | |
977 | DIR *dir_from; | |
cb9a0eee | 978 | |
14957190 | 979 | dir_from = opendir(PKGLIBEXECDIR "/devices"); |
761dfddc KS |
980 | if (dir_from == NULL) |
981 | return; | |
51f43b53 | 982 | copy_dev_dir(udev, dir_from, dir, 8); |
761dfddc KS |
983 | closedir(dir_from); |
984 | } | |
985 | ||
986 | static void static_dev_create(struct udev *udev) | |
987 | { | |
988 | DIR *dir; | |
cb9a0eee | 989 | |
761dfddc KS |
990 | dir = opendir(udev_get_dev_path(udev)); |
991 | if (dir == NULL) | |
992 | return; | |
993 | ||
994 | static_dev_create_links(udev, dir); | |
995 | static_dev_create_from_devices(udev, dir); | |
996 | ||
997 | closedir(dir); | |
cb9a0eee KS |
998 | } |
999 | ||
1000 | static int mem_size_mb(void) | |
1001 | { | |
1002 | FILE *f; | |
1003 | char buf[4096]; | |
1004 | long int memsize = -1; | |
1005 | ||
1006 | f = fopen("/proc/meminfo", "r"); | |
1007 | if (f == NULL) | |
1008 | return -1; | |
1009 | ||
1010 | while (fgets(buf, sizeof(buf), f) != NULL) { | |
1011 | long int value; | |
1012 | ||
1013 | if (sscanf(buf, "MemTotal: %ld kB", &value) == 1) { | |
1014 | memsize = value / 1024; | |
1015 | break; | |
1016 | } | |
1017 | } | |
1018 | ||
1019 | fclose(f); | |
1020 | return memsize; | |
1021 | } | |
1022 | ||
5f59fa09 KS |
1023 | static int convert_db(struct udev *udev) |
1024 | { | |
1025 | char filename[UTIL_PATH_SIZE]; | |
1026 | FILE *f; | |
1027 | struct udev_enumerate *udev_enumerate; | |
1028 | struct udev_list_entry *list_entry; | |
1029 | ||
1030 | /* current database */ | |
4ec9c3e7 | 1031 | util_strscpyl(filename, sizeof(filename), udev_get_run_path(udev), "/data", NULL); |
5f59fa09 KS |
1032 | if (access(filename, F_OK) >= 0) |
1033 | return 0; | |
1034 | ||
1035 | /* make sure we do not get here again */ | |
5f59fa09 | 1036 | util_create_path(udev, filename); |
4ec9c3e7 | 1037 | mkdir(filename, 0755); |
5f59fa09 KS |
1038 | |
1039 | /* old database */ | |
1040 | util_strscpyl(filename, sizeof(filename), udev_get_dev_path(udev), "/.udev/db", NULL); | |
1041 | if (access(filename, F_OK) < 0) | |
1042 | return 0; | |
1043 | ||
1044 | f = fopen("/dev/kmsg", "w"); | |
1045 | if (f != NULL) { | |
dff107dc | 1046 | fprintf(f, "<30>udevd[%u]: converting old udev database\n", getpid()); |
5f59fa09 KS |
1047 | fclose(f); |
1048 | } | |
1049 | ||
1050 | udev_enumerate = udev_enumerate_new(udev); | |
1051 | if (udev_enumerate == NULL) | |
1052 | return -1; | |
1053 | udev_enumerate_scan_devices(udev_enumerate); | |
1054 | udev_list_entry_foreach(list_entry, udev_enumerate_get_list_entry(udev_enumerate)) { | |
1055 | struct udev_device *device; | |
1056 | ||
1057 | device = udev_device_new_from_syspath(udev, udev_list_entry_get_name(list_entry)); | |
1058 | if (device == NULL) | |
1059 | continue; | |
1060 | ||
1061 | /* try to find the old database for devices without a current one */ | |
1062 | if (udev_device_read_db(device, NULL) < 0) { | |
1063 | bool have_db; | |
1064 | const char *id; | |
1065 | struct stat stats; | |
1066 | char devpath[UTIL_PATH_SIZE]; | |
1067 | char from[UTIL_PATH_SIZE]; | |
1068 | ||
1069 | have_db = false; | |
1070 | ||
1071 | /* find database in old location */ | |
1072 | id = udev_device_get_id_filename(device); | |
1073 | util_strscpyl(from, sizeof(from), udev_get_dev_path(udev), "/.udev/db/", id, NULL); | |
1074 | if (lstat(from, &stats) == 0) { | |
1075 | if (!have_db) { | |
1076 | udev_device_read_db(device, from); | |
1077 | have_db = true; | |
1078 | } | |
1079 | unlink(from); | |
1080 | } | |
1081 | ||
1082 | /* find old database with $subsys:$sysname name */ | |
1083 | util_strscpyl(from, sizeof(from), udev_get_dev_path(udev), | |
1084 | "/.udev/db/", udev_device_get_subsystem(device), ":", | |
1085 | udev_device_get_sysname(device), NULL); | |
1086 | if (lstat(from, &stats) == 0) { | |
1087 | if (!have_db) { | |
1088 | udev_device_read_db(device, from); | |
1089 | have_db = true; | |
1090 | } | |
1091 | unlink(from); | |
1092 | } | |
1093 | ||
1094 | /* find old database with the encoded devpath name */ | |
1095 | util_path_encode(udev_device_get_devpath(device), devpath, sizeof(devpath)); | |
4ec9c3e7 | 1096 | util_strscpyl(from, sizeof(from), udev_get_dev_path(udev), "/.udev/db/", devpath, NULL); |
5f59fa09 KS |
1097 | if (lstat(from, &stats) == 0) { |
1098 | if (!have_db) { | |
1099 | udev_device_read_db(device, from); | |
1100 | have_db = true; | |
1101 | } | |
1102 | unlink(from); | |
1103 | } | |
1104 | ||
1105 | /* write out new database */ | |
1106 | if (have_db) | |
1107 | udev_device_update_db(device); | |
1108 | } | |
1109 | udev_device_unref(device); | |
1110 | } | |
1111 | udev_enumerate_unref(udev_enumerate); | |
1112 | return 0; | |
1113 | } | |
1114 | ||
7459bcdc KS |
1115 | static int systemd_fds(struct udev *udev, int *rctrl, int *rnetlink) |
1116 | { | |
1117 | int ctrl = -1, netlink = -1; | |
1118 | int fd, n; | |
1119 | ||
1120 | n = sd_listen_fds(true); | |
1121 | if (n <= 0) | |
1122 | return -1; | |
1123 | ||
1124 | for (fd = SD_LISTEN_FDS_START; fd < n + SD_LISTEN_FDS_START; fd++) { | |
1125 | if (sd_is_socket(fd, AF_LOCAL, SOCK_SEQPACKET, -1)) { | |
1126 | if (ctrl >= 0) | |
1127 | return -1; | |
1128 | ctrl = fd; | |
1129 | continue; | |
1130 | } | |
1131 | ||
1132 | if (sd_is_socket(fd, AF_NETLINK, SOCK_RAW, -1)) { | |
1133 | if (netlink >= 0) | |
1134 | return -1; | |
1135 | netlink = fd; | |
1136 | continue; | |
1137 | } | |
1138 | ||
1139 | return -1; | |
1140 | } | |
1141 | ||
1142 | if (ctrl < 0 || netlink < 0) | |
1143 | return -1; | |
1144 | ||
1145 | info(udev, "ctrl=%i netlink=%i\n", ctrl, netlink); | |
1146 | *rctrl = ctrl; | |
1147 | *rnetlink = netlink; | |
1148 | return 0; | |
1149 | } | |
1150 | ||
4f1795cc KS |
1151 | static bool check_rules_timestamp(struct udev *udev) |
1152 | { | |
1153 | char **p; | |
1154 | unsigned long long *stamp_usec; | |
1155 | int i, n; | |
1156 | bool changed = false; | |
1157 | ||
1158 | n = udev_get_rules_path(udev, &p, &stamp_usec); | |
1159 | for (i = 0; i < n; i++) { | |
1160 | struct stat stats; | |
1161 | ||
1162 | if (stat(p[i], &stats) < 0) | |
1163 | continue; | |
1164 | ||
1165 | if (stamp_usec[i] == ts_usec(&stats.st_mtim)) | |
1166 | continue; | |
1167 | ||
1168 | /* first check */ | |
1169 | if (stamp_usec[i] != 0) { | |
1170 | info(udev, "reload - timestamp of '%s' changed\n", p[i]); | |
1171 | changed = true; | |
1172 | } | |
1173 | ||
1174 | /* update timestamp */ | |
1175 | stamp_usec[i] = ts_usec(&stats.st_mtim); | |
1176 | } | |
1177 | ||
1178 | return changed; | |
1179 | } | |
1180 | ||
59345311 | 1181 | int main(int argc, char *argv[]) |
c2cf4012 | 1182 | { |
7d563a17 | 1183 | struct udev *udev; |
3c189886 | 1184 | FILE *f; |
1e03b754 | 1185 | sigset_t mask; |
c3804728 | 1186 | int daemonize = false; |
5f03ed8a | 1187 | int resolve_names = 1; |
b52a01ee | 1188 | static const struct option options[] = { |
033e9f8c | 1189 | { "daemon", no_argument, NULL, 'd' }, |
033e9f8c | 1190 | { "debug", no_argument, NULL, 'D' }, |
337d1027 | 1191 | { "children-max", required_argument, NULL, 'c' }, |
c830e98d | 1192 | { "exec-delay", required_argument, NULL, 'e' }, |
337d1027 | 1193 | { "resolve-names", required_argument, NULL, 'N' }, |
033e9f8c KS |
1194 | { "help", no_argument, NULL, 'h' }, |
1195 | { "version", no_argument, NULL, 'V' }, | |
b52a01ee KS |
1196 | {} |
1197 | }; | |
ff2c503d KS |
1198 | int fd_ctrl = -1; |
1199 | int fd_netlink = -1; | |
1200 | int fd_worker = -1; | |
1201 | struct epoll_event ep_ctrl, ep_inotify, ep_signal, ep_netlink, ep_worker; | |
1202 | struct udev_ctrl_connection *ctrl_conn = NULL; | |
4f1795cc | 1203 | char **s; |
e3396a2d | 1204 | int rc = 1; |
53921bfa | 1205 | |
7d563a17 KS |
1206 | udev = udev_new(); |
1207 | if (udev == NULL) | |
1208 | goto exit; | |
1209 | ||
9060b066 | 1210 | udev_log_init("udevd"); |
80df994c | 1211 | udev_set_log_fn(udev, udev_main_log); |
aa8734ff | 1212 | info(udev, "version %s\n", VERSION); |
c3b1fa66 | 1213 | udev_selinux_init(udev); |
95a6f4c8 | 1214 | |
88cbfb09 | 1215 | for (;;) { |
7d563a17 KS |
1216 | int option; |
1217 | ||
6ee9b2cb | 1218 | option = getopt_long(argc, argv, "c:deDtN:hV", options, NULL); |
b52a01ee KS |
1219 | if (option == -1) |
1220 | break; | |
1221 | ||
1222 | switch (option) { | |
1223 | case 'd': | |
c3804728 | 1224 | daemonize = true; |
b52a01ee | 1225 | break; |
337d1027 | 1226 | case 'c': |
c830e98d KS |
1227 | children_max = strtoul(optarg, NULL, 0); |
1228 | break; | |
1229 | case 'e': | |
1230 | exec_delay = strtoul(optarg, NULL, 0); | |
c7c00276 | 1231 | break; |
c70560fe | 1232 | case 'D': |
c3804728 | 1233 | debug = true; |
7d563a17 KS |
1234 | if (udev_get_log_priority(udev) < LOG_INFO) |
1235 | udev_set_log_priority(udev, LOG_INFO); | |
9e8fe79b | 1236 | break; |
5f03ed8a SJR |
1237 | case 'N': |
1238 | if (strcmp (optarg, "early") == 0) { | |
1239 | resolve_names = 1; | |
9032f119 SJR |
1240 | } else if (strcmp (optarg, "late") == 0) { |
1241 | resolve_names = 0; | |
5f03ed8a SJR |
1242 | } else if (strcmp (optarg, "never") == 0) { |
1243 | resolve_names = -1; | |
1244 | } else { | |
9032f119 SJR |
1245 | fprintf(stderr, "resolve-names must be early, late or never\n"); |
1246 | err(udev, "resolve-names must be early, late or never\n"); | |
5f03ed8a SJR |
1247 | goto exit; |
1248 | } | |
1249 | break; | |
b52a01ee | 1250 | case 'h': |
c830e98d KS |
1251 | printf("Usage: udevd OPTIONS\n" |
1252 | " --daemon\n" | |
1253 | " --debug\n" | |
1254 | " --children-max=<maximum number of workers>\n" | |
1255 | " --exec-delay=<seconds to wait before executing RUN=>\n" | |
ad29a9f1 | 1256 | " --resolve-names=early|late|never\n" |
c830e98d KS |
1257 | " --version\n" |
1258 | " --help\n" | |
1259 | "\n"); | |
841e168c MS |
1260 | goto exit; |
1261 | case 'V': | |
01618658 | 1262 | printf("%s\n", VERSION); |
e3396a2d | 1263 | goto exit; |
b52a01ee KS |
1264 | default: |
1265 | goto exit; | |
561d4c5a | 1266 | } |
561d4c5a | 1267 | } |
40caaeec | 1268 | |
c830e98d KS |
1269 | /* |
1270 | * read the kernel commandline, in case we need to get into debug mode | |
1271 | * udev.log-priority=<level> syslog priority | |
1272 | * udev.children-max=<number of workers> events are fully serialized if set to 1 | |
1273 | * | |
1274 | */ | |
1275 | f = fopen("/proc/cmdline", "r"); | |
1276 | if (f != NULL) { | |
1277 | char cmdline[4096]; | |
1278 | ||
1279 | if (fgets(cmdline, sizeof(cmdline), f) != NULL) { | |
1280 | char *pos; | |
1281 | ||
1282 | pos = strstr(cmdline, "udev.log-priority="); | |
1283 | if (pos != NULL) { | |
1284 | pos += strlen("udev.log-priority="); | |
1285 | udev_set_log_priority(udev, util_log_priority(pos)); | |
1286 | } | |
1287 | ||
1288 | pos = strstr(cmdline, "udev.children-max="); | |
1289 | if (pos != NULL) { | |
1290 | pos += strlen("udev.children-max="); | |
1291 | children_max = strtoul(pos, NULL, 0); | |
1292 | } | |
1293 | ||
1294 | pos = strstr(cmdline, "udev.exec-delay="); | |
1295 | if (pos != NULL) { | |
1296 | pos += strlen("udev.exec-delay="); | |
1297 | exec_delay = strtoul(pos, NULL, 0); | |
1298 | } | |
1299 | } | |
1300 | fclose(f); | |
1301 | } | |
1302 | ||
1182b947 KS |
1303 | if (getuid() != 0) { |
1304 | fprintf(stderr, "root privileges required\n"); | |
1305 | err(udev, "root privileges required\n"); | |
1306 | goto exit; | |
1307 | } | |
1308 | ||
1309 | /* set umask before creating any file/directory */ | |
1310 | chdir("/"); | |
1311 | umask(022); | |
1312 | ||
86a0d004 KS |
1313 | /* /run/udev */ |
1314 | mkdir(udev_get_run_path(udev), 0755); | |
1315 | ||
1a6ab670 MS |
1316 | /* create standard links, copy static nodes, create nodes from modules */ |
1317 | static_dev_create(udev); | |
1318 | static_dev_create_from_modules(udev); | |
1319 | ||
1182b947 | 1320 | /* before opening new files, make sure std{in,out,err} fds are in a sane state */ |
8b463136 KS |
1321 | if (daemonize) { |
1322 | int fd; | |
1323 | ||
1324 | fd = open("/dev/null", O_RDWR); | |
1325 | if (fd >= 0) { | |
1326 | if (write(STDOUT_FILENO, 0, 0) < 0) | |
1327 | dup2(fd, STDOUT_FILENO); | |
1328 | if (write(STDERR_FILENO, 0, 0) < 0) | |
1329 | dup2(fd, STDERR_FILENO); | |
1330 | if (fd > STDERR_FILENO) | |
1331 | close(fd); | |
1332 | } else { | |
1333 | fprintf(stderr, "cannot open /dev/null\n"); | |
1334 | err(udev, "cannot open /dev/null\n"); | |
1335 | } | |
5edec024 | 1336 | } |
5edec024 | 1337 | |
7459bcdc KS |
1338 | if (systemd_fds(udev, &fd_ctrl, &fd_netlink) >= 0) { |
1339 | /* get control and netlink socket from from systemd */ | |
5cc4112e | 1340 | udev_ctrl = udev_ctrl_new_from_fd(udev, fd_ctrl); |
7459bcdc KS |
1341 | if (udev_ctrl == NULL) { |
1342 | err(udev, "error taking over udev control socket"); | |
1343 | rc = 1; | |
1344 | goto exit; | |
1345 | } | |
1346 | ||
1347 | monitor = udev_monitor_new_from_netlink_fd(udev, "kernel", fd_netlink); | |
1348 | if (monitor == NULL) { | |
1349 | err(udev, "error taking over netlink socket\n"); | |
1350 | rc = 3; | |
1351 | goto exit; | |
1352 | } | |
1353 | } else { | |
1354 | /* open control and netlink socket */ | |
5cc4112e | 1355 | udev_ctrl = udev_ctrl_new(udev); |
7459bcdc KS |
1356 | if (udev_ctrl == NULL) { |
1357 | fprintf(stderr, "error initializing udev control socket"); | |
1358 | err(udev, "error initializing udev control socket"); | |
1359 | rc = 1; | |
1360 | goto exit; | |
1361 | } | |
1362 | fd_ctrl = udev_ctrl_get_fd(udev_ctrl); | |
1363 | ||
1364 | monitor = udev_monitor_new_from_netlink(udev, "kernel"); | |
1365 | if (monitor == NULL) { | |
1366 | fprintf(stderr, "error initializing netlink socket\n"); | |
1367 | err(udev, "error initializing netlink socket\n"); | |
1368 | rc = 3; | |
1369 | goto exit; | |
1370 | } | |
1371 | fd_netlink = udev_monitor_get_fd(monitor); | |
1372 | } | |
1373 | ||
1374 | if (udev_monitor_enable_receiving(monitor) < 0) { | |
1375 | fprintf(stderr, "error binding netlink socket\n"); | |
1376 | err(udev, "error binding netlink socket\n"); | |
1377 | rc = 3; | |
d59f11e1 KS |
1378 | goto exit; |
1379 | } | |
7459bcdc | 1380 | |
d59f11e1 | 1381 | if (udev_ctrl_enable_receiving(udev_ctrl) < 0) { |
fc1de713 KS |
1382 | fprintf(stderr, "error binding udev control socket\n"); |
1383 | err(udev, "error binding udev control socket\n"); | |
d59f11e1 | 1384 | rc = 1; |
833b3c68 KS |
1385 | goto exit; |
1386 | } | |
1387 | ||
1e03b754 | 1388 | udev_monitor_set_receive_buffer_size(monitor, 128*1024*1024); |
1e03b754 | 1389 | |
2738ec2c KS |
1390 | /* create queue file before signalling 'ready', to make sure we block 'settle' */ |
1391 | udev_queue_export = udev_queue_export_new(udev); | |
1392 | if (udev_queue_export == NULL) { | |
1393 | err(udev, "error creating queue file\n"); | |
1394 | goto exit; | |
1395 | } | |
1396 | ||
ff2c503d KS |
1397 | if (daemonize) { |
1398 | pid_t pid; | |
8b463136 | 1399 | int fd; |
ff2c503d KS |
1400 | |
1401 | pid = fork(); | |
1402 | switch (pid) { | |
1403 | case 0: | |
1404 | break; | |
1405 | case -1: | |
1406 | err(udev, "fork of daemon failed: %m\n"); | |
1407 | rc = 4; | |
1408 | goto exit; | |
1409 | default: | |
2738ec2c | 1410 | rc = EXIT_SUCCESS; |
1f5a5100 | 1411 | goto exit_daemonize; |
ff2c503d | 1412 | } |
8b463136 KS |
1413 | |
1414 | setsid(); | |
1415 | ||
1416 | fd = open("/proc/self/oom_score_adj", O_RDWR); | |
1417 | if (fd < 0) { | |
1418 | /* Fallback to old interface */ | |
1419 | fd = open("/proc/self/oom_adj", O_RDWR); | |
1420 | if (fd < 0) { | |
1421 | err(udev, "error disabling OOM: %m\n"); | |
1422 | } else { | |
1423 | /* OOM_DISABLE == -17 */ | |
1424 | write(fd, "-17", 3); | |
1425 | close(fd); | |
1426 | } | |
1427 | } else { | |
1428 | write(fd, "-1000", 5); | |
1429 | close(fd); | |
1430 | } | |
ff2c503d KS |
1431 | } else { |
1432 | sd_notify(1, "READY=1"); | |
1433 | } | |
1434 | ||
8b463136 KS |
1435 | f = fopen("/dev/kmsg", "w"); |
1436 | if (f != NULL) { | |
dff107dc | 1437 | fprintf(f, "<30>udevd[%u]: starting version " VERSION "\n", getpid()); |
8b463136 KS |
1438 | fclose(f); |
1439 | } | |
1440 | ||
1441 | if (!debug) { | |
1442 | int fd; | |
1443 | ||
1444 | fd = open("/dev/null", O_RDWR); | |
1445 | if (fd >= 0) { | |
1446 | dup2(fd, STDIN_FILENO); | |
1447 | dup2(fd, STDOUT_FILENO); | |
1448 | dup2(fd, STDERR_FILENO); | |
1449 | close(fd); | |
1450 | } | |
1451 | } | |
1452 | ||
ff2c503d KS |
1453 | fd_inotify = udev_watch_init(udev); |
1454 | if (fd_inotify < 0) { | |
1e03b754 KS |
1455 | fprintf(stderr, "error initializing inotify\n"); |
1456 | err(udev, "error initializing inotify\n"); | |
1457 | rc = 4; | |
1458 | goto exit; | |
1459 | } | |
1e03b754 KS |
1460 | udev_watch_restore(udev); |
1461 | ||
1462 | /* block and listen to all signals on signalfd */ | |
1463 | sigfillset(&mask); | |
2181d30a | 1464 | sigprocmask(SIG_SETMASK, &mask, &sigmask_orig); |
82063a88 | 1465 | fd_signal = signalfd(-1, &mask, SFD_NONBLOCK|SFD_CLOEXEC); |
ff2c503d | 1466 | if (fd_signal < 0) { |
82063a88 KS |
1467 | fprintf(stderr, "error creating signalfd\n"); |
1468 | err(udev, "error creating signalfd\n"); | |
1e03b754 KS |
1469 | rc = 5; |
1470 | goto exit; | |
1471 | } | |
1472 | ||
1473 | /* unnamed socket from workers to the main daemon */ | |
26347a4c | 1474 | if (socketpair(AF_LOCAL, SOCK_DGRAM|SOCK_CLOEXEC, 0, worker_watch) < 0) { |
82063a88 KS |
1475 | fprintf(stderr, "error creating socketpair\n"); |
1476 | err(udev, "error creating socketpair\n"); | |
1e03b754 KS |
1477 | rc = 6; |
1478 | goto exit; | |
1479 | } | |
ff2c503d | 1480 | fd_worker = worker_watch[READ_END]; |
833b3c68 | 1481 | |
779f4de1 | 1482 | udev_builtin_init(udev); |
aa29418a | 1483 | |
5f03ed8a | 1484 | rules = udev_rules_new(udev, resolve_names); |
d7ddce18 KS |
1485 | if (rules == NULL) { |
1486 | err(udev, "error reading rules\n"); | |
1487 | goto exit; | |
1488 | } | |
1e03b754 | 1489 | |
ff2c503d KS |
1490 | memset(&ep_ctrl, 0, sizeof(struct epoll_event)); |
1491 | ep_ctrl.events = EPOLLIN; | |
1492 | ep_ctrl.data.fd = fd_ctrl; | |
7459bcdc | 1493 | |
ff2c503d KS |
1494 | memset(&ep_inotify, 0, sizeof(struct epoll_event)); |
1495 | ep_inotify.events = EPOLLIN; | |
1496 | ep_inotify.data.fd = fd_inotify; | |
7459bcdc | 1497 | |
ff2c503d KS |
1498 | memset(&ep_signal, 0, sizeof(struct epoll_event)); |
1499 | ep_signal.events = EPOLLIN; | |
1500 | ep_signal.data.fd = fd_signal; | |
7459bcdc | 1501 | |
ff2c503d KS |
1502 | memset(&ep_netlink, 0, sizeof(struct epoll_event)); |
1503 | ep_netlink.events = EPOLLIN; | |
1504 | ep_netlink.data.fd = fd_netlink; | |
7459bcdc | 1505 | |
ff2c503d KS |
1506 | memset(&ep_worker, 0, sizeof(struct epoll_event)); |
1507 | ep_worker.events = EPOLLIN; | |
1508 | ep_worker.data.fd = fd_worker; | |
7459bcdc | 1509 | |
ff2c503d KS |
1510 | fd_ep = epoll_create1(EPOLL_CLOEXEC); |
1511 | if (fd_ep < 0) { | |
1512 | err(udev, "error creating epoll fd: %m\n"); | |
1513 | goto exit; | |
1514 | } | |
1515 | if (epoll_ctl(fd_ep, EPOLL_CTL_ADD, fd_ctrl, &ep_ctrl) < 0 || | |
1516 | epoll_ctl(fd_ep, EPOLL_CTL_ADD, fd_inotify, &ep_inotify) < 0 || | |
1517 | epoll_ctl(fd_ep, EPOLL_CTL_ADD, fd_signal, &ep_signal) < 0 || | |
1518 | epoll_ctl(fd_ep, EPOLL_CTL_ADD, fd_netlink, &ep_netlink) < 0 || | |
1519 | epoll_ctl(fd_ep, EPOLL_CTL_ADD, fd_worker, &ep_worker) < 0) { | |
1520 | err(udev, "fail to add fds to epoll: %m\n"); | |
1521 | goto exit; | |
1522 | } | |
1523 | ||
5f59fa09 KS |
1524 | /* if needed, convert old database from earlier udev version */ |
1525 | convert_db(udev); | |
1526 | ||
337d1027 | 1527 | if (children_max <= 0) { |
c830e98d KS |
1528 | int memsize = mem_size_mb(); |
1529 | ||
1530 | /* set value depending on the amount of RAM */ | |
1531 | if (memsize > 0) | |
1532 | children_max = 128 + (memsize / 8); | |
1533 | else | |
1534 | children_max = 128; | |
337d1027 KS |
1535 | } |
1536 | info(udev, "set children_max to %u\n", children_max); | |
a15f42c4 | 1537 | |
761dfddc KS |
1538 | udev_rules_apply_static_dev_perms(rules); |
1539 | ||
869c9031 KS |
1540 | udev_list_node_init(&event_list); |
1541 | udev_list_node_init(&worker_list); | |
1e03b754 | 1542 | |
ff2c503d | 1543 | for (;;) { |
4f1795cc | 1544 | static unsigned long long last_usec; |
ff2c503d | 1545 | struct epoll_event ev[8]; |
e9a77fd8 | 1546 | int fdcount; |
1e03b754 | 1547 | int timeout; |
ff2c503d KS |
1548 | bool is_worker, is_signal, is_inotify, is_netlink, is_ctrl; |
1549 | int i; | |
1550 | ||
1551 | if (udev_exit) { | |
1552 | /* close sources of new events and discard buffered events */ | |
1553 | if (fd_ctrl >= 0) { | |
1554 | epoll_ctl(fd_ep, EPOLL_CTL_DEL, fd_ctrl, NULL); | |
1555 | fd_ctrl = -1; | |
1556 | } | |
1557 | if (monitor != NULL) { | |
1558 | epoll_ctl(fd_ep, EPOLL_CTL_DEL, fd_netlink, NULL); | |
1559 | udev_monitor_unref(monitor); | |
1560 | monitor = NULL; | |
1561 | } | |
1562 | if (fd_inotify >= 0) { | |
1563 | epoll_ctl(fd_ep, EPOLL_CTL_DEL, fd_inotify, NULL); | |
1564 | close(fd_inotify); | |
1565 | fd_inotify = -1; | |
1566 | } | |
3210a72b | 1567 | |
ff2c503d KS |
1568 | /* discard queued events and kill workers */ |
1569 | event_queue_cleanup(udev, EVENT_QUEUED); | |
1570 | worker_kill(udev, 0); | |
1571 | ||
1572 | /* exit after all has cleaned up */ | |
869c9031 | 1573 | if (udev_list_node_is_empty(&event_list) && udev_list_node_is_empty(&worker_list)) |
ff2c503d KS |
1574 | break; |
1575 | ||
1576 | /* timeout at exit for workers to finish */ | |
1577 | timeout = 60 * 1000; | |
869c9031 | 1578 | } else if (udev_list_node_is_empty(&event_list) && children > 2) { |
ff2c503d | 1579 | /* set timeout to kill idle workers */ |
1e03b754 | 1580 | timeout = 3 * 1000; |
ff2c503d | 1581 | } else { |
1e03b754 | 1582 | timeout = -1; |
ff2c503d KS |
1583 | } |
1584 | fdcount = epoll_wait(fd_ep, ev, ARRAY_SIZE(ev), timeout); | |
1e03b754 KS |
1585 | if (fdcount < 0) |
1586 | continue; | |
021a294c | 1587 | |
ff2c503d KS |
1588 | if (fdcount == 0) { |
1589 | if (udev_exit) { | |
1590 | info(udev, "timeout, giving up waiting for workers to finish\n"); | |
1591 | break; | |
1592 | } | |
1593 | ||
1594 | /* timeout - kill idle workers */ | |
adda4c68 | 1595 | worker_kill(udev, 2); |
ff2c503d KS |
1596 | } |
1597 | ||
1598 | is_worker = is_signal = is_inotify = is_netlink = is_ctrl = false; | |
1599 | for (i = 0; i < fdcount; i++) { | |
1600 | if (ev[i].data.fd == fd_worker && ev[i].events & EPOLLIN) | |
1601 | is_worker = true; | |
1602 | else if (ev[i].data.fd == fd_netlink && ev[i].events & EPOLLIN) | |
1603 | is_netlink = true; | |
1604 | else if (ev[i].data.fd == fd_signal && ev[i].events & EPOLLIN) | |
1605 | is_signal = true; | |
1606 | else if (ev[i].data.fd == fd_inotify && ev[i].events & EPOLLIN) | |
1607 | is_inotify = true; | |
1608 | else if (ev[i].data.fd == fd_ctrl && ev[i].events & EPOLLIN) | |
1609 | is_ctrl = true; | |
1610 | } | |
e9a77fd8 | 1611 | |
4f1795cc KS |
1612 | /* check for changed config, every 3 seconds at most */ |
1613 | if ((now_usec() - last_usec) > 3 * 1000 * 1000) { | |
1614 | if (check_rules_timestamp(udev)) | |
1615 | reload = true; | |
1616 | if (udev_builtin_validate(udev)) | |
1617 | reload = true; | |
1618 | ||
1619 | last_usec = now_usec(); | |
1620 | } | |
1621 | ||
1622 | /* reload requested, HUP signal received, rules changed, builtin changed */ | |
1623 | if (reload) { | |
1624 | worker_kill(udev, 0); | |
1625 | rules = udev_rules_unref(rules); | |
1626 | udev_builtin_exit(udev); | |
1627 | reload = 0; | |
1628 | } | |
1629 | ||
1e03b754 | 1630 | /* event has finished */ |
ff2c503d KS |
1631 | if (is_worker) |
1632 | worker_returned(fd_worker); | |
e9a77fd8 | 1633 | |
ff2c503d | 1634 | if (is_netlink) { |
1e03b754 | 1635 | struct udev_device *dev; |
3210a72b | 1636 | |
1e03b754 | 1637 | dev = udev_monitor_receive_device(monitor); |
54da6290 | 1638 | if (dev != NULL) { |
a20a57a7 | 1639 | udev_device_set_usec_initialized(dev, now_usec()); |
40929a02 YK |
1640 | if (event_queue_insert(dev) < 0) |
1641 | udev_device_unref(dev); | |
54da6290 | 1642 | } |
2f6cbd19 | 1643 | } |
e5a2989e | 1644 | |
1e03b754 | 1645 | /* start new events */ |
7c85d636 KS |
1646 | if (!udev_list_node_is_empty(&event_list) && !udev_exit && !stop_exec_queue) { |
1647 | if (rules == NULL) | |
1648 | rules = udev_rules_new(udev, resolve_names); | |
1649 | if (rules != NULL) | |
1650 | event_queue_start(udev); | |
1651 | } | |
aa8734ff | 1652 | |
ff2c503d | 1653 | if (is_signal) { |
1e03b754 KS |
1654 | struct signalfd_siginfo fdsi; |
1655 | ssize_t size; | |
aa8734ff | 1656 | |
ff2c503d | 1657 | size = read(fd_signal, &fdsi, sizeof(struct signalfd_siginfo)); |
1e03b754 | 1658 | if (size == sizeof(struct signalfd_siginfo)) |
45798927 | 1659 | handle_signal(udev, fdsi.ssi_signo); |
021a294c | 1660 | } |
e5a2989e | 1661 | |
ff2c503d KS |
1662 | /* we are shutting down, the events below are not handled anymore */ |
1663 | if (udev_exit) | |
1664 | continue; | |
1665 | ||
4f1795cc | 1666 | /* device node watch */ |
ff2c503d | 1667 | if (is_inotify) |
4aca304e | 1668 | handle_inotify(udev); |
c895fd00 | 1669 | |
1e03b754 | 1670 | /* |
1e03b754 | 1671 | * This needs to be after the inotify handling, to make sure, |
ff2c503d | 1672 | * that the ping is send back after the possibly generated |
1e03b754 | 1673 | * "change" events by the inotify device node watch. |
ff2c503d KS |
1674 | * |
1675 | * A single time we may receive a client connection which we need to | |
1676 | * keep open to block the client. It will be closed right before we | |
1677 | * exit. | |
1e03b754 | 1678 | */ |
ff2c503d KS |
1679 | if (is_ctrl) |
1680 | ctrl_conn = handle_ctrl_msg(udev_ctrl); | |
53921bfa | 1681 | } |
1e03b754 | 1682 | |
2738ec2c | 1683 | rc = EXIT_SUCCESS; |
53921bfa | 1684 | exit: |
2738ec2c | 1685 | udev_queue_export_cleanup(udev_queue_export); |
1f5a5100 KS |
1686 | udev_ctrl_cleanup(udev_ctrl); |
1687 | exit_daemonize: | |
ff2c503d KS |
1688 | if (fd_ep >= 0) |
1689 | close(fd_ep); | |
1690 | worker_list_cleanup(udev); | |
1691 | event_queue_cleanup(udev, EVENT_UNDEF); | |
d7ddce18 | 1692 | udev_rules_unref(rules); |
779f4de1 | 1693 | udev_builtin_exit(udev); |
ff2c503d KS |
1694 | if (fd_signal >= 0) |
1695 | close(fd_signal); | |
1e03b754 KS |
1696 | if (worker_watch[READ_END] >= 0) |
1697 | close(worker_watch[READ_END]); | |
1698 | if (worker_watch[WRITE_END] >= 0) | |
1699 | close(worker_watch[WRITE_END]); | |
1700 | udev_monitor_unref(monitor); | |
ff2c503d KS |
1701 | udev_queue_export_unref(udev_queue_export); |
1702 | udev_ctrl_connection_unref(ctrl_conn); | |
1703 | udev_ctrl_unref(udev_ctrl); | |
c3b1fa66 | 1704 | udev_selinux_exit(udev); |
e598c573 | 1705 | udev_unref(udev); |
9060b066 | 1706 | udev_log_close(); |
833b3c68 | 1707 | return rc; |
7fafc032 | 1708 | } |