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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> | |
618234a5 LP |
11 | #include <stdbool.h> |
12 | #include <stddef.h> | |
7fafc032 KS |
13 | #include <stdio.h> |
14 | #include <stdlib.h> | |
618234a5 | 15 | #include <sys/epoll.h> |
3ebdb81e | 16 | #include <sys/file.h> |
618234a5 LP |
17 | #include <sys/inotify.h> |
18 | #include <sys/ioctl.h> | |
19 | #include <sys/mount.h> | |
1e03b754 | 20 | #include <sys/prctl.h> |
1e03b754 | 21 | #include <sys/signalfd.h> |
dc117daa | 22 | #include <sys/stat.h> |
618234a5 LP |
23 | #include <sys/time.h> |
24 | #include <sys/wait.h> | |
25 | #include <unistd.h> | |
7fafc032 | 26 | |
392ef7a2 | 27 | #include "sd-daemon.h" |
693d371d | 28 | #include "sd-event.h" |
8314de1d | 29 | |
b5efdb8a | 30 | #include "alloc-util.h" |
681bd2c5 | 31 | #include "build.h" |
194bbe33 | 32 | #include "cgroup-util.h" |
618234a5 | 33 | #include "cpu-set-util.h" |
5ba2dc25 | 34 | #include "dev-setup.h" |
7f2e3a14 | 35 | #include "device-monitor-private.h" |
abde5ea8 | 36 | #include "device-private.h" |
70068602 | 37 | #include "device-util.h" |
6d63048a | 38 | #include "event-util.h" |
3ffd4af2 | 39 | #include "fd-util.h" |
a5c32cff | 40 | #include "fileio.h" |
f97b34a6 | 41 | #include "format-util.h" |
f4f15635 | 42 | #include "fs-util.h" |
a505965d | 43 | #include "hashmap.h" |
c004493c | 44 | #include "io-util.h" |
70068602 | 45 | #include "libudev-device-internal.h" |
eefc66aa | 46 | #include "limits-util.h" |
40a57716 | 47 | #include "list.h" |
0c5a109a | 48 | #include "main-func.h" |
5ea78a39 | 49 | #include "mkdir.h" |
618234a5 | 50 | #include "netlink-util.h" |
6bedfcbb | 51 | #include "parse-util.h" |
294bf0c3 | 52 | #include "pretty-print.h" |
4e731273 | 53 | #include "proc-cmdline.h" |
618234a5 LP |
54 | #include "process-util.h" |
55 | #include "selinux-util.h" | |
56 | #include "signal-util.h" | |
8f328d36 | 57 | #include "socket-util.h" |
07630cea | 58 | #include "string-util.h" |
49fe5c09 | 59 | #include "strv.h" |
5ea78a39 | 60 | #include "strxcpyx.h" |
46f0fbd8 | 61 | #include "syslog-util.h" |
63e2d171 | 62 | #include "udevd.h" |
07a26e42 | 63 | #include "udev-builtin.h" |
7d68eb1b | 64 | #include "udev-ctrl.h" |
25de7aa7 | 65 | #include "udev-event.h" |
618234a5 | 66 | #include "udev-util.h" |
70068602 | 67 | #include "udev-watch.h" |
ee104e11 | 68 | #include "user-util.h" |
7fafc032 | 69 | |
88bd5a32 FB |
70 | #define WORKER_NUM_MAX 2048U |
71 | ||
bba7a484 TG |
72 | static bool arg_debug = false; |
73 | static int arg_daemonize = false; | |
c4d44cba | 74 | static ResolveNameTiming arg_resolve_name_timing = RESOLVE_NAME_EARLY; |
216e8bbe | 75 | static unsigned arg_children_max = 0; |
6b92f429 | 76 | static usec_t arg_exec_delay_usec = 0; |
bba7a484 | 77 | static usec_t arg_event_timeout_usec = 180 * USEC_PER_SEC; |
e2099267 | 78 | static int arg_timeout_signal = SIGKILL; |
95ac5230 | 79 | static bool arg_blockdev_read_only = false; |
c0c6806b TG |
80 | |
81 | typedef struct Manager { | |
693d371d | 82 | sd_event *event; |
c0c6806b | 83 | Hashmap *workers; |
40a57716 | 84 | LIST_HEAD(struct event, events); |
c26d1879 | 85 | const char *cgroup; |
cb49a4f2 | 86 | pid_t pid; /* the process that originally allocated the manager object */ |
c0c6806b | 87 | |
9a07157d | 88 | UdevRules *rules; |
9b5150b6 | 89 | Hashmap *properties; |
c0c6806b | 90 | |
0bed242c YW |
91 | sd_netlink *rtnl; |
92 | ||
7f2e3a14 | 93 | sd_device_monitor *monitor; |
c0c6806b | 94 | struct udev_ctrl *ctrl; |
e237d8cb | 95 | int fd_inotify; |
e237d8cb TG |
96 | int worker_watch[2]; |
97 | ||
693d371d | 98 | sd_event_source *inotify_event; |
eca195ec | 99 | sd_event_source *kill_workers_event; |
693d371d | 100 | |
7c4c7e89 TG |
101 | usec_t last_usec; |
102 | ||
c0c6806b | 103 | bool stop_exec_queue:1; |
c0c6806b TG |
104 | bool exit:1; |
105 | } Manager; | |
1e03b754 | 106 | |
1e03b754 | 107 | enum event_state { |
912541b0 KS |
108 | EVENT_UNDEF, |
109 | EVENT_QUEUED, | |
110 | EVENT_RUNNING, | |
1e03b754 KS |
111 | }; |
112 | ||
113 | struct event { | |
cb49a4f2 | 114 | Manager *manager; |
c6aa11f2 | 115 | struct worker *worker; |
912541b0 | 116 | enum event_state state; |
eb546b35 YW |
117 | |
118 | sd_device *dev; | |
119 | sd_device *dev_kernel; /* clone of originally received device */ | |
120 | ||
121 | uint64_t seqnum; | |
122 | uint64_t delaying_seqnum; | |
d8f462b4 YW |
123 | |
124 | sd_event_source *timeout_warning_event; | |
125 | sd_event_source *timeout_event; | |
eb546b35 YW |
126 | |
127 | LIST_FIELDS(struct event, event); | |
1e03b754 KS |
128 | }; |
129 | ||
ecb17862 | 130 | static void event_queue_cleanup(Manager *manager, enum event_state type); |
ff2c503d | 131 | |
1e03b754 | 132 | enum worker_state { |
912541b0 KS |
133 | WORKER_UNDEF, |
134 | WORKER_RUNNING, | |
135 | WORKER_IDLE, | |
136 | WORKER_KILLED, | |
1e03b754 KS |
137 | }; |
138 | ||
139 | struct worker { | |
c0c6806b | 140 | Manager *manager; |
912541b0 | 141 | pid_t pid; |
7f2e3a14 | 142 | sd_device_monitor *monitor; |
912541b0 KS |
143 | enum worker_state state; |
144 | struct event *event; | |
1e03b754 KS |
145 | }; |
146 | ||
147 | /* passed from worker to main process */ | |
148 | struct worker_message { | |
1e03b754 KS |
149 | }; |
150 | ||
c6aa11f2 TG |
151 | static void event_free(struct event *event) { |
152 | if (!event) | |
153 | return; | |
ba47b71c | 154 | |
40a57716 | 155 | assert(event->manager); |
c6aa11f2 | 156 | |
40a57716 | 157 | LIST_REMOVE(event, event->manager->events, event); |
eb546b35 YW |
158 | sd_device_unref(event->dev); |
159 | sd_device_unref(event->dev_kernel); | |
c6aa11f2 | 160 | |
d8f462b4 YW |
161 | sd_event_source_unref(event->timeout_warning_event); |
162 | sd_event_source_unref(event->timeout_event); | |
693d371d | 163 | |
c6aa11f2 TG |
164 | if (event->worker) |
165 | event->worker->event = NULL; | |
166 | ||
ba47b71c YW |
167 | /* only clean up the queue from the process that created it */ |
168 | if (LIST_IS_EMPTY(event->manager->events) && | |
169 | event->manager->pid == getpid_cached()) | |
170 | if (unlink("/run/udev/queue") < 0) | |
171 | log_warning_errno(errno, "Failed to unlink /run/udev/queue: %m"); | |
cb49a4f2 | 172 | |
912541b0 | 173 | free(event); |
aa8734ff | 174 | } |
7a770250 | 175 | |
c6aa11f2 TG |
176 | static void worker_free(struct worker *worker) { |
177 | if (!worker) | |
178 | return; | |
bc113de9 | 179 | |
c0c6806b TG |
180 | assert(worker->manager); |
181 | ||
4a0b58c4 | 182 | hashmap_remove(worker->manager->workers, PID_TO_PTR(worker->pid)); |
7f2e3a14 | 183 | sd_device_monitor_unref(worker->monitor); |
c6aa11f2 TG |
184 | event_free(worker->event); |
185 | ||
c6aa11f2 | 186 | free(worker); |
ff2c503d KS |
187 | } |
188 | ||
1f3f6bd0 | 189 | DEFINE_TRIVIAL_CLEANUP_FUNC(struct worker *, worker_free); |
956833b4 | 190 | DEFINE_PRIVATE_HASH_OPS_WITH_VALUE_DESTRUCTOR(worker_hash_op, void, trivial_hash_func, trivial_compare_func, struct worker, worker_free); |
fc465079 | 191 | |
7f2e3a14 | 192 | static int worker_new(struct worker **ret, Manager *manager, sd_device_monitor *worker_monitor, pid_t pid) { |
1f3f6bd0 | 193 | _cleanup_(worker_freep) struct worker *worker = NULL; |
a505965d | 194 | int r; |
3a19b32a TG |
195 | |
196 | assert(ret); | |
c0c6806b | 197 | assert(manager); |
3a19b32a TG |
198 | assert(worker_monitor); |
199 | assert(pid > 1); | |
200 | ||
d4053464 YW |
201 | /* close monitor, but keep address around */ |
202 | device_monitor_disconnect(worker_monitor); | |
203 | ||
204 | worker = new(struct worker, 1); | |
3a19b32a TG |
205 | if (!worker) |
206 | return -ENOMEM; | |
207 | ||
d4053464 YW |
208 | *worker = (struct worker) { |
209 | .manager = manager, | |
210 | .monitor = sd_device_monitor_ref(worker_monitor), | |
211 | .pid = pid, | |
212 | }; | |
a505965d | 213 | |
956833b4 | 214 | r = hashmap_ensure_allocated(&manager->workers, &worker_hash_op); |
a505965d TG |
215 | if (r < 0) |
216 | return r; | |
217 | ||
4a0b58c4 | 218 | r = hashmap_put(manager->workers, PID_TO_PTR(pid), worker); |
a505965d TG |
219 | if (r < 0) |
220 | return r; | |
221 | ||
ae2a15bc | 222 | *ret = TAKE_PTR(worker); |
3a19b32a TG |
223 | |
224 | return 0; | |
225 | } | |
226 | ||
4fa4d885 TG |
227 | static int on_event_timeout(sd_event_source *s, uint64_t usec, void *userdata) { |
228 | struct event *event = userdata; | |
229 | ||
230 | assert(event); | |
231 | assert(event->worker); | |
232 | ||
e2099267 | 233 | kill_and_sigcont(event->worker->pid, arg_timeout_signal); |
4fa4d885 TG |
234 | event->worker->state = WORKER_KILLED; |
235 | ||
eb546b35 | 236 | log_device_error(event->dev, "Worker ["PID_FMT"] processing SEQNUM=%"PRIu64" killed", event->worker->pid, event->seqnum); |
4fa4d885 TG |
237 | |
238 | return 1; | |
239 | } | |
240 | ||
241 | static int on_event_timeout_warning(sd_event_source *s, uint64_t usec, void *userdata) { | |
242 | struct event *event = userdata; | |
243 | ||
244 | assert(event); | |
044497e2 | 245 | assert(event->worker); |
4fa4d885 | 246 | |
eb546b35 | 247 | log_device_warning(event->dev, "Worker ["PID_FMT"] processing SEQNUM=%"PRIu64" is taking a long time", event->worker->pid, event->seqnum); |
4fa4d885 TG |
248 | |
249 | return 1; | |
250 | } | |
251 | ||
39c19cf1 | 252 | static void worker_attach_event(struct worker *worker, struct event *event) { |
693d371d | 253 | sd_event *e; |
693d371d | 254 | |
c6aa11f2 | 255 | assert(worker); |
693d371d | 256 | assert(worker->manager); |
c6aa11f2 TG |
257 | assert(event); |
258 | assert(!event->worker); | |
259 | assert(!worker->event); | |
260 | ||
39c19cf1 | 261 | worker->state = WORKER_RUNNING; |
39c19cf1 TG |
262 | worker->event = event; |
263 | event->state = EVENT_RUNNING; | |
c6aa11f2 | 264 | event->worker = worker; |
693d371d TG |
265 | |
266 | e = worker->manager->event; | |
267 | ||
39cf0351 LP |
268 | (void) sd_event_add_time_relative(e, &event->timeout_warning_event, CLOCK_MONOTONIC, |
269 | udev_warn_timeout(arg_event_timeout_usec), USEC_PER_SEC, | |
270 | on_event_timeout_warning, event); | |
693d371d | 271 | |
39cf0351 LP |
272 | (void) sd_event_add_time_relative(e, &event->timeout_event, CLOCK_MONOTONIC, |
273 | arg_event_timeout_usec, USEC_PER_SEC, | |
274 | on_event_timeout, event); | |
39c19cf1 TG |
275 | } |
276 | ||
0bed242c YW |
277 | static void manager_clear_for_worker(Manager *manager) { |
278 | assert(manager); | |
279 | ||
0bed242c YW |
280 | manager->inotify_event = sd_event_source_unref(manager->inotify_event); |
281 | manager->kill_workers_event = sd_event_source_unref(manager->kill_workers_event); | |
282 | ||
283 | manager->event = sd_event_unref(manager->event); | |
284 | ||
956833b4 | 285 | manager->workers = hashmap_free(manager->workers); |
0bed242c YW |
286 | event_queue_cleanup(manager, EVENT_UNDEF); |
287 | ||
7f2e3a14 | 288 | manager->monitor = sd_device_monitor_unref(manager->monitor); |
0bed242c YW |
289 | manager->ctrl = udev_ctrl_unref(manager->ctrl); |
290 | ||
291 | manager->worker_watch[READ_END] = safe_close(manager->worker_watch[READ_END]); | |
292 | } | |
293 | ||
e237d8cb TG |
294 | static void manager_free(Manager *manager) { |
295 | if (!manager) | |
296 | return; | |
297 | ||
2024ed61 | 298 | udev_builtin_exit(); |
b2d21d93 | 299 | |
76e62a4d YW |
300 | if (manager->pid == getpid_cached()) |
301 | udev_ctrl_cleanup(manager->ctrl); | |
302 | ||
0bed242c | 303 | manager_clear_for_worker(manager); |
693d371d | 304 | |
0bed242c | 305 | sd_netlink_unref(manager->rtnl); |
e237d8cb | 306 | |
9b5150b6 | 307 | hashmap_free_free_free(manager->properties); |
981fae90 | 308 | udev_rules_free(manager->rules); |
e237d8cb | 309 | |
e237d8cb TG |
310 | safe_close(manager->fd_inotify); |
311 | safe_close_pair(manager->worker_watch); | |
312 | ||
313 | free(manager); | |
314 | } | |
315 | ||
316 | DEFINE_TRIVIAL_CLEANUP_FUNC(Manager*, manager_free); | |
317 | ||
9a73bd7c TG |
318 | static int worker_send_message(int fd) { |
319 | struct worker_message message = {}; | |
320 | ||
321 | return loop_write(fd, &message, sizeof(message), false); | |
322 | } | |
323 | ||
b97897e3 | 324 | static int worker_lock_block_device(sd_device *dev, int *ret_fd) { |
0bed242c | 325 | _cleanup_close_ int fd = -1; |
b97897e3 YW |
326 | const char *val; |
327 | int r; | |
fee854ee | 328 | |
0bed242c YW |
329 | assert(dev); |
330 | assert(ret_fd); | |
331 | ||
332 | /* | |
333 | * Take a shared lock on the device node; this establishes | |
334 | * a concept of device "ownership" to serialize device | |
335 | * access. External processes holding an exclusive lock will | |
336 | * cause udev to skip the event handling; in the case udev | |
337 | * acquired the lock, the external process can block until | |
338 | * udev has finished its event handling. | |
339 | */ | |
340 | ||
d4d690fa | 341 | if (device_for_action(dev, DEVICE_ACTION_REMOVE)) |
0bed242c YW |
342 | return 0; |
343 | ||
b97897e3 YW |
344 | r = sd_device_get_subsystem(dev, &val); |
345 | if (r < 0) | |
346 | return log_device_debug_errno(dev, r, "Failed to get subsystem: %m"); | |
347 | ||
348 | if (!streq(val, "block")) | |
0bed242c | 349 | return 0; |
fee854ee | 350 | |
b97897e3 YW |
351 | r = sd_device_get_sysname(dev, &val); |
352 | if (r < 0) | |
353 | return log_device_debug_errno(dev, r, "Failed to get sysname: %m"); | |
354 | ||
49fe5c09 | 355 | if (STARTSWITH_SET(val, "dm-", "md", "drbd")) |
0bed242c YW |
356 | return 0; |
357 | ||
b97897e3 YW |
358 | r = sd_device_get_devtype(dev, &val); |
359 | if (r < 0 && r != -ENOENT) | |
360 | return log_device_debug_errno(dev, r, "Failed to get devtype: %m"); | |
361 | if (r >= 0 && streq(val, "partition")) { | |
362 | r = sd_device_get_parent(dev, &dev); | |
363 | if (r < 0) | |
364 | return log_device_debug_errno(dev, r, "Failed to get parent device: %m"); | |
365 | } | |
0bed242c | 366 | |
b97897e3 YW |
367 | r = sd_device_get_devname(dev, &val); |
368 | if (r == -ENOENT) | |
0bed242c | 369 | return 0; |
b97897e3 YW |
370 | if (r < 0) |
371 | return log_device_debug_errno(dev, r, "Failed to get devname: %m"); | |
0bed242c | 372 | |
b97897e3 YW |
373 | fd = open(val, O_RDONLY|O_CLOEXEC|O_NOFOLLOW|O_NONBLOCK); |
374 | if (fd < 0) { | |
375 | log_device_debug_errno(dev, errno, "Failed to open '%s', ignoring: %m", val); | |
0bed242c | 376 | return 0; |
b97897e3 | 377 | } |
0bed242c YW |
378 | |
379 | if (flock(fd, LOCK_SH|LOCK_NB) < 0) | |
b97897e3 | 380 | return log_device_debug_errno(dev, errno, "Failed to flock(%s): %m", val); |
0bed242c YW |
381 | |
382 | *ret_fd = TAKE_FD(fd); | |
383 | return 1; | |
fee854ee RK |
384 | } |
385 | ||
95ac5230 LP |
386 | static int worker_mark_block_device_read_only(sd_device *dev) { |
387 | _cleanup_close_ int fd = -1; | |
388 | const char *val; | |
389 | int state = 1, r; | |
390 | ||
391 | assert(dev); | |
392 | ||
393 | if (!arg_blockdev_read_only) | |
394 | return 0; | |
395 | ||
396 | /* Do this only once, when the block device is new. If the device is later retriggered let's not | |
397 | * toggle the bit again, so that people can boot up with full read-only mode and then unset the bit | |
398 | * for specific devices only. */ | |
399 | if (!device_for_action(dev, DEVICE_ACTION_ADD)) | |
400 | return 0; | |
401 | ||
402 | r = sd_device_get_subsystem(dev, &val); | |
403 | if (r < 0) | |
404 | return log_device_debug_errno(dev, r, "Failed to get subsystem: %m"); | |
405 | ||
406 | if (!streq(val, "block")) | |
407 | return 0; | |
408 | ||
409 | r = sd_device_get_sysname(dev, &val); | |
410 | if (r < 0) | |
411 | return log_device_debug_errno(dev, r, "Failed to get sysname: %m"); | |
412 | ||
413 | /* Exclude synthetic devices for now, this is supposed to be a safety feature to avoid modification | |
414 | * of physical devices, and what sits on top of those doesn't really matter if we don't allow the | |
cb713f16 | 415 | * underlying block devices to receive changes. */ |
95ac5230 LP |
416 | if (STARTSWITH_SET(val, "dm-", "md", "drbd", "loop", "nbd", "zram")) |
417 | return 0; | |
418 | ||
419 | r = sd_device_get_devname(dev, &val); | |
420 | if (r == -ENOENT) | |
421 | return 0; | |
422 | if (r < 0) | |
423 | return log_device_debug_errno(dev, r, "Failed to get devname: %m"); | |
424 | ||
425 | fd = open(val, O_RDONLY|O_CLOEXEC|O_NOFOLLOW|O_NONBLOCK); | |
426 | if (fd < 0) | |
427 | return log_device_debug_errno(dev, errno, "Failed to open '%s', ignoring: %m", val); | |
428 | ||
429 | if (ioctl(fd, BLKROSET, &state) < 0) | |
430 | return log_device_warning_errno(dev, errno, "Failed to mark block device '%s' read-only: %m", val); | |
431 | ||
432 | log_device_info(dev, "Successfully marked block device '%s' read-only.", val); | |
433 | return 0; | |
434 | } | |
435 | ||
abde5ea8 | 436 | static int worker_process_device(Manager *manager, sd_device *dev) { |
2e088715 | 437 | _cleanup_(udev_event_freep) UdevEvent *udev_event = NULL; |
0bed242c | 438 | _cleanup_close_ int fd_lock = -1; |
d4d690fa YW |
439 | DeviceAction action; |
440 | uint64_t seqnum; | |
0bed242c | 441 | int r; |
912541b0 | 442 | |
0bed242c YW |
443 | assert(manager); |
444 | assert(dev); | |
445 | ||
d4d690fa | 446 | r = device_get_seqnum(dev, &seqnum); |
abde5ea8 | 447 | if (r < 0) |
25d4f5b0 | 448 | return log_device_debug_errno(dev, r, "Failed to get SEQNUM: %m"); |
abde5ea8 | 449 | |
d4d690fa | 450 | r = device_get_action(dev, &action); |
c0ff3d6c YW |
451 | if (r < 0) |
452 | return log_device_debug_errno(dev, r, "Failed to get ACTION: %m"); | |
453 | ||
d4d690fa YW |
454 | log_device_debug(dev, "Processing device (SEQNUM=%"PRIu64", ACTION=%s)", |
455 | seqnum, device_action_to_string(action)); | |
abde5ea8 YW |
456 | |
457 | udev_event = udev_event_new(dev, arg_exec_delay_usec, manager->rtnl); | |
0bed242c YW |
458 | if (!udev_event) |
459 | return -ENOMEM; | |
460 | ||
abde5ea8 | 461 | r = worker_lock_block_device(dev, &fd_lock); |
b6aab8ef | 462 | if (r < 0) |
0bed242c | 463 | return r; |
912541b0 | 464 | |
95ac5230 LP |
465 | (void) worker_mark_block_device_read_only(dev); |
466 | ||
0bed242c | 467 | /* apply rules, create node, symlinks */ |
e2099267 | 468 | r = udev_event_execute_rules(udev_event, arg_event_timeout_usec, arg_timeout_signal, manager->properties, manager->rules); |
99058cd6 YW |
469 | if (r < 0) |
470 | return r; | |
471 | ||
e2099267 | 472 | udev_event_execute_run(udev_event, arg_event_timeout_usec, arg_timeout_signal); |
2dd9f98d | 473 | |
0bed242c YW |
474 | if (!manager->rtnl) |
475 | /* in case rtnl was initialized */ | |
476 | manager->rtnl = sd_netlink_ref(udev_event->rtnl); | |
912541b0 | 477 | |
0bed242c YW |
478 | /* apply/restore inotify watch */ |
479 | if (udev_event->inotify_watch) { | |
abde5ea8 YW |
480 | (void) udev_watch_begin(dev); |
481 | r = device_update_db(dev); | |
482 | if (r < 0) | |
483 | return log_device_debug_errno(dev, r, "Failed to update database under /run/udev/data/: %m"); | |
0bed242c | 484 | } |
912541b0 | 485 | |
d4d690fa YW |
486 | log_device_debug(dev, "Device (SEQNUM=%"PRIu64", ACTION=%s) processed", |
487 | seqnum, device_action_to_string(action)); | |
912541b0 | 488 | |
0bed242c YW |
489 | return 0; |
490 | } | |
912541b0 | 491 | |
e2130348 YW |
492 | static int worker_device_monitor_handler(sd_device_monitor *monitor, sd_device *dev, void *userdata) { |
493 | Manager *manager = userdata; | |
494 | int r; | |
495 | ||
496 | assert(dev); | |
497 | assert(manager); | |
498 | ||
499 | r = worker_process_device(manager, dev); | |
5abee64e LP |
500 | if (r == -EAGAIN) |
501 | /* if we couldn't acquire the flock(), then proceed quietly */ | |
502 | log_device_debug_errno(dev, r, "Device currently locked, not processing."); | |
503 | else { | |
504 | if (r < 0) | |
505 | log_device_warning_errno(dev, r, "Failed to process device, ignoring: %m"); | |
e2130348 | 506 | |
5abee64e LP |
507 | /* send processed event back to libudev listeners */ |
508 | r = device_monitor_send_device(monitor, NULL, dev); | |
509 | if (r < 0) | |
510 | log_device_warning_errno(dev, r, "Failed to send device, ignoring: %m"); | |
511 | } | |
e2130348 YW |
512 | |
513 | /* send udevd the result of the event execution */ | |
514 | r = worker_send_message(manager->worker_watch[WRITE_END]); | |
515 | if (r < 0) | |
516 | log_device_warning_errno(dev, r, "Failed to send signal to main daemon, ignoring: %m"); | |
517 | ||
518 | return 1; | |
519 | } | |
520 | ||
7f2e3a14 YW |
521 | static int worker_main(Manager *_manager, sd_device_monitor *monitor, sd_device *first_device) { |
522 | _cleanup_(sd_device_unrefp) sd_device *dev = first_device; | |
0bed242c | 523 | _cleanup_(manager_freep) Manager *manager = _manager; |
44dcf454 | 524 | int r; |
145dae7e | 525 | |
0bed242c YW |
526 | assert(manager); |
527 | assert(monitor); | |
528 | assert(dev); | |
912541b0 | 529 | |
0bed242c | 530 | unsetenv("NOTIFY_SOCKET"); |
3b64e4d4 | 531 | |
e2130348 YW |
532 | assert_se(sigprocmask_many(SIG_BLOCK, NULL, SIGTERM, -1) >= 0); |
533 | ||
534 | /* Reset OOM score, we only protect the main daemon. */ | |
535 | r = set_oom_score_adjust(0); | |
536 | if (r < 0) | |
537 | log_debug_errno(r, "Failed to reset OOM score, ignoring: %m"); | |
912541b0 | 538 | |
e2130348 YW |
539 | /* Clear unnecessary data in Manager object.*/ |
540 | manager_clear_for_worker(manager); | |
3ebdb81e | 541 | |
e2130348 YW |
542 | r = sd_event_new(&manager->event); |
543 | if (r < 0) | |
544 | return log_error_errno(r, "Failed to allocate event loop: %m"); | |
912541b0 | 545 | |
e2130348 YW |
546 | r = sd_event_add_signal(manager->event, NULL, SIGTERM, NULL, NULL); |
547 | if (r < 0) | |
548 | return log_error_errno(r, "Failed to set SIGTERM event: %m"); | |
4c83d994 | 549 | |
e2130348 YW |
550 | r = sd_device_monitor_attach_event(monitor, manager->event); |
551 | if (r < 0) | |
552 | return log_error_errno(r, "Failed to attach event loop to device monitor: %m"); | |
912541b0 | 553 | |
e2130348 | 554 | r = sd_device_monitor_start(monitor, worker_device_monitor_handler, manager); |
0bed242c | 555 | if (r < 0) |
e2130348 | 556 | return log_error_errno(r, "Failed to start device monitor: %m"); |
912541b0 | 557 | |
e2130348 | 558 | (void) sd_event_source_set_description(sd_device_monitor_get_event_source(monitor), "worker-device-monitor"); |
b66f29a1 | 559 | |
e2130348 YW |
560 | /* Process first device */ |
561 | (void) worker_device_monitor_handler(monitor, dev, manager); | |
912541b0 | 562 | |
e2130348 YW |
563 | r = sd_event_loop(manager->event); |
564 | if (r < 0) | |
565 | return log_error_errno(r, "Event loop failed: %m"); | |
566 | ||
44dcf454 | 567 | return 0; |
0bed242c YW |
568 | } |
569 | ||
7443654e | 570 | static int worker_spawn(Manager *manager, struct event *event) { |
7f2e3a14 | 571 | _cleanup_(sd_device_monitor_unrefp) sd_device_monitor *worker_monitor = NULL; |
7443654e | 572 | struct worker *worker; |
0bed242c | 573 | pid_t pid; |
7443654e | 574 | int r; |
0bed242c YW |
575 | |
576 | /* listen for new events */ | |
7f2e3a14 YW |
577 | r = device_monitor_new_full(&worker_monitor, MONITOR_GROUP_NONE, -1); |
578 | if (r < 0) | |
579 | return r; | |
7443654e | 580 | |
0bed242c | 581 | /* allow the main daemon netlink address to send devices to the worker */ |
7f2e3a14 YW |
582 | r = device_monitor_allow_unicast_sender(worker_monitor, manager->monitor); |
583 | if (r < 0) | |
584 | return log_error_errno(r, "Worker: Failed to set unicast sender: %m"); | |
585 | ||
586 | r = device_monitor_enable_receiving(worker_monitor); | |
0bed242c | 587 | if (r < 0) |
7f2e3a14 | 588 | return log_error_errno(r, "Worker: Failed to enable receiving of device: %m"); |
0bed242c | 589 | |
ff86c92e | 590 | r = safe_fork(NULL, FORK_DEATHSIG, &pid); |
7443654e YW |
591 | if (r < 0) { |
592 | event->state = EVENT_QUEUED; | |
593 | return log_error_errno(r, "Failed to fork() worker: %m"); | |
594 | } | |
595 | if (r == 0) { | |
596 | /* Worker process */ | |
eb546b35 | 597 | r = worker_main(manager, worker_monitor, sd_device_ref(event->dev)); |
baa30fbc | 598 | log_close(); |
8b46c3fc | 599 | _exit(r < 0 ? EXIT_FAILURE : EXIT_SUCCESS); |
912541b0 | 600 | } |
e03c7cc2 | 601 | |
7443654e YW |
602 | r = worker_new(&worker, manager, worker_monitor, pid); |
603 | if (r < 0) | |
604 | return log_error_errno(r, "Failed to create worker object: %m"); | |
e03c7cc2 | 605 | |
7443654e | 606 | worker_attach_event(worker, event); |
39c19cf1 | 607 | |
eb546b35 | 608 | log_device_debug(event->dev, "Worker ["PID_FMT"] is forked for processing SEQNUM=%"PRIu64".", pid, event->seqnum); |
7443654e | 609 | return 0; |
7fafc032 KS |
610 | } |
611 | ||
c0c6806b | 612 | static void event_run(Manager *manager, struct event *event) { |
5406c368 | 613 | static bool log_children_max_reached = true; |
a505965d | 614 | struct worker *worker; |
7f2e3a14 | 615 | int r; |
912541b0 | 616 | |
c0c6806b TG |
617 | assert(manager); |
618 | assert(event); | |
619 | ||
7600dbb8 UKK |
620 | if (DEBUG_LOGGING) { |
621 | DeviceAction action; | |
622 | ||
623 | r = device_get_action(event->dev, &action); | |
624 | log_device_debug(event->dev, "Device (SEQNUM=%"PRIu64", ACTION=%s) ready for processing", | |
625 | event->seqnum, r >= 0 ? device_action_to_string(action) : "<unknown>"); | |
626 | } | |
627 | ||
90e74a66 | 628 | HASHMAP_FOREACH(worker, manager->workers) { |
912541b0 KS |
629 | if (worker->state != WORKER_IDLE) |
630 | continue; | |
631 | ||
eb546b35 | 632 | r = device_monitor_send_device(manager->monitor, worker->monitor, event->dev); |
7f2e3a14 | 633 | if (r < 0) { |
eb546b35 | 634 | log_device_error_errno(event->dev, r, "Worker ["PID_FMT"] did not accept message, killing the worker: %m", |
7f2e3a14 | 635 | worker->pid); |
cb542e84 | 636 | (void) kill(worker->pid, SIGKILL); |
912541b0 KS |
637 | worker->state = WORKER_KILLED; |
638 | continue; | |
639 | } | |
39c19cf1 | 640 | worker_attach_event(worker, event); |
912541b0 KS |
641 | return; |
642 | } | |
643 | ||
c0c6806b | 644 | if (hashmap_size(manager->workers) >= arg_children_max) { |
5406c368 FB |
645 | |
646 | /* Avoid spamming the debug logs if the limit is already reached and | |
647 | * many events still need to be processed */ | |
648 | if (log_children_max_reached && arg_children_max > 1) { | |
044497e2 | 649 | log_debug("Maximum number (%u) of children reached.", hashmap_size(manager->workers)); |
5406c368 FB |
650 | log_children_max_reached = false; |
651 | } | |
912541b0 KS |
652 | return; |
653 | } | |
654 | ||
5406c368 FB |
655 | /* Re-enable the debug message for the next batch of events */ |
656 | log_children_max_reached = true; | |
657 | ||
2df2152c CG |
658 | /* fork with up-to-date SELinux label database, so the child inherits the up-to-date db |
659 | and, until the next SELinux policy changes, we safe further reloads in future children */ | |
660 | mac_selinux_maybe_reload(); | |
661 | ||
912541b0 | 662 | /* start new worker and pass initial device */ |
c0c6806b | 663 | worker_spawn(manager, event); |
1e03b754 KS |
664 | } |
665 | ||
eb546b35 YW |
666 | static int event_queue_insert(Manager *manager, sd_device *dev) { |
667 | _cleanup_(sd_device_unrefp) sd_device *clone = NULL; | |
912541b0 | 668 | struct event *event; |
d4d690fa | 669 | DeviceAction action; |
eb546b35 | 670 | uint64_t seqnum; |
cb49a4f2 | 671 | int r; |
912541b0 | 672 | |
ecb17862 TG |
673 | assert(manager); |
674 | assert(dev); | |
675 | ||
040e6896 | 676 | /* only one process can add events to the queue */ |
df0ff127 | 677 | assert(manager->pid == getpid_cached()); |
cb49a4f2 | 678 | |
eb546b35 | 679 | /* We only accepts devices received by device monitor. */ |
d4d690fa | 680 | r = device_get_seqnum(dev, &seqnum); |
eb546b35 YW |
681 | if (r < 0) |
682 | return r; | |
683 | ||
e0b7a5d1 | 684 | /* Refuse devices do not have ACTION property. */ |
d4d690fa | 685 | r = device_get_action(dev, &action); |
e0b7a5d1 YW |
686 | if (r < 0) |
687 | return r; | |
688 | ||
eb546b35 YW |
689 | /* Save original device to restore the state on failures. */ |
690 | r = device_shallow_clone(dev, &clone); | |
691 | if (r < 0) | |
692 | return r; | |
693 | ||
694 | r = device_copy_properties(clone, dev); | |
695 | if (r < 0) | |
696 | return r; | |
912541b0 | 697 | |
eb546b35 YW |
698 | event = new(struct event, 1); |
699 | if (!event) | |
700 | return -ENOMEM; | |
912541b0 | 701 | |
eb546b35 YW |
702 | *event = (struct event) { |
703 | .manager = manager, | |
704 | .dev = sd_device_ref(dev), | |
705 | .dev_kernel = TAKE_PTR(clone), | |
706 | .seqnum = seqnum, | |
707 | .state = EVENT_QUEUED, | |
708 | }; | |
cb49a4f2 | 709 | |
40a57716 | 710 | if (LIST_IS_EMPTY(manager->events)) { |
cb49a4f2 TG |
711 | r = touch("/run/udev/queue"); |
712 | if (r < 0) | |
044497e2 | 713 | log_warning_errno(r, "Failed to touch /run/udev/queue: %m"); |
cb49a4f2 TG |
714 | } |
715 | ||
40a57716 | 716 | LIST_APPEND(event, manager->events, event); |
cb49a4f2 | 717 | |
d4d690fa YW |
718 | log_device_debug(dev, "Device (SEQNUM=%"PRIu64", ACTION=%s) is queued", |
719 | seqnum, device_action_to_string(action)); | |
eb546b35 | 720 | |
912541b0 | 721 | return 0; |
fc465079 KS |
722 | } |
723 | ||
c0c6806b | 724 | static void manager_kill_workers(Manager *manager) { |
a505965d | 725 | struct worker *worker; |
1e03b754 | 726 | |
c0c6806b TG |
727 | assert(manager); |
728 | ||
90e74a66 | 729 | HASHMAP_FOREACH(worker, manager->workers) { |
912541b0 KS |
730 | if (worker->state == WORKER_KILLED) |
731 | continue; | |
1e03b754 | 732 | |
912541b0 | 733 | worker->state = WORKER_KILLED; |
cb542e84 | 734 | (void) kill(worker->pid, SIGTERM); |
912541b0 | 735 | } |
1e03b754 KS |
736 | } |
737 | ||
e3196993 | 738 | /* lookup event for identical, parent, child device */ |
eb546b35 YW |
739 | static int is_device_busy(Manager *manager, struct event *event) { |
740 | const char *subsystem, *devpath, *devpath_old = NULL; | |
741 | dev_t devnum = makedev(0, 0); | |
40a57716 | 742 | struct event *loop_event; |
eb546b35 YW |
743 | size_t devpath_len; |
744 | int r, ifindex = 0; | |
745 | bool is_block; | |
746 | ||
747 | r = sd_device_get_subsystem(event->dev, &subsystem); | |
748 | if (r < 0) | |
749 | return r; | |
750 | ||
751 | is_block = streq(subsystem, "block"); | |
752 | ||
753 | r = sd_device_get_devpath(event->dev, &devpath); | |
754 | if (r < 0) | |
755 | return r; | |
756 | ||
757 | devpath_len = strlen(devpath); | |
758 | ||
759 | r = sd_device_get_property_value(event->dev, "DEVPATH_OLD", &devpath_old); | |
760 | if (r < 0 && r != -ENOENT) | |
761 | return r; | |
762 | ||
763 | r = sd_device_get_devnum(event->dev, &devnum); | |
764 | if (r < 0 && r != -ENOENT) | |
765 | return r; | |
766 | ||
767 | r = sd_device_get_ifindex(event->dev, &ifindex); | |
768 | if (r < 0 && r != -ENOENT) | |
769 | return r; | |
912541b0 KS |
770 | |
771 | /* check if queue contains events we depend on */ | |
40a57716 | 772 | LIST_FOREACH(event, loop_event, manager->events) { |
eb546b35 YW |
773 | size_t loop_devpath_len, common; |
774 | const char *loop_devpath; | |
775 | ||
87ac8d99 | 776 | /* we already found a later event, earlier cannot block us, no need to check again */ |
912541b0 KS |
777 | if (loop_event->seqnum < event->delaying_seqnum) |
778 | continue; | |
779 | ||
780 | /* event we checked earlier still exists, no need to check again */ | |
781 | if (loop_event->seqnum == event->delaying_seqnum) | |
782 | return true; | |
783 | ||
784 | /* found ourself, no later event can block us */ | |
785 | if (loop_event->seqnum >= event->seqnum) | |
786 | break; | |
787 | ||
788 | /* check major/minor */ | |
eb546b35 YW |
789 | if (major(devnum) != 0) { |
790 | const char *s; | |
791 | dev_t d; | |
792 | ||
793 | if (sd_device_get_subsystem(loop_event->dev, &s) < 0) | |
794 | continue; | |
795 | ||
796 | if (sd_device_get_devnum(loop_event->dev, &d) >= 0 && | |
797 | devnum == d && is_block == streq(s, "block")) | |
86714116 | 798 | goto set_delaying_seqnum; |
eb546b35 | 799 | } |
912541b0 KS |
800 | |
801 | /* check network device ifindex */ | |
eb546b35 YW |
802 | if (ifindex > 0) { |
803 | int i; | |
804 | ||
805 | if (sd_device_get_ifindex(loop_event->dev, &i) >= 0 && | |
806 | ifindex == i) | |
86714116 | 807 | goto set_delaying_seqnum; |
eb546b35 YW |
808 | } |
809 | ||
810 | if (sd_device_get_devpath(loop_event->dev, &loop_devpath) < 0) | |
811 | continue; | |
912541b0 KS |
812 | |
813 | /* check our old name */ | |
0bd0407e YW |
814 | if (devpath_old && streq(devpath_old, loop_devpath)) |
815 | goto set_delaying_seqnum; | |
912541b0 | 816 | |
eb546b35 YW |
817 | loop_devpath_len = strlen(loop_devpath); |
818 | ||
912541b0 | 819 | /* compare devpath */ |
eb546b35 | 820 | common = MIN(devpath_len, loop_devpath_len); |
912541b0 KS |
821 | |
822 | /* one devpath is contained in the other? */ | |
eb546b35 | 823 | if (!strneq(devpath, loop_devpath, common)) |
912541b0 KS |
824 | continue; |
825 | ||
826 | /* identical device event found */ | |
baa461fc | 827 | if (devpath_len == loop_devpath_len) |
0bd0407e | 828 | goto set_delaying_seqnum; |
912541b0 KS |
829 | |
830 | /* parent device event found */ | |
0bd0407e YW |
831 | if (devpath[common] == '/') |
832 | goto set_delaying_seqnum; | |
912541b0 KS |
833 | |
834 | /* child device event found */ | |
0bd0407e YW |
835 | if (loop_devpath[common] == '/') |
836 | goto set_delaying_seqnum; | |
912541b0 KS |
837 | } |
838 | ||
839 | return false; | |
0bd0407e YW |
840 | |
841 | set_delaying_seqnum: | |
7600dbb8 UKK |
842 | log_device_debug(event->dev, "SEQNUM=%" PRIu64 " blocked by SEQNUM=%" PRIu64, |
843 | event->seqnum, loop_event->seqnum); | |
844 | ||
0bd0407e YW |
845 | event->delaying_seqnum = loop_event->seqnum; |
846 | return true; | |
7fafc032 KS |
847 | } |
848 | ||
62d43dac | 849 | static void manager_exit(Manager *manager) { |
62d43dac TG |
850 | assert(manager); |
851 | ||
852 | manager->exit = true; | |
853 | ||
b79aacbf TG |
854 | sd_notify(false, |
855 | "STOPPING=1\n" | |
856 | "STATUS=Starting shutdown..."); | |
857 | ||
62d43dac | 858 | /* close sources of new events and discard buffered events */ |
ab7854df | 859 | manager->ctrl = udev_ctrl_unref(manager->ctrl); |
62d43dac | 860 | |
693d371d | 861 | manager->inotify_event = sd_event_source_unref(manager->inotify_event); |
ab7854df | 862 | manager->fd_inotify = safe_close(manager->fd_inotify); |
62d43dac | 863 | |
3cabdc23 MW |
864 | manager->monitor = sd_device_monitor_unref(manager->monitor); |
865 | ||
62d43dac TG |
866 | /* discard queued events and kill workers */ |
867 | event_queue_cleanup(manager, EVENT_QUEUED); | |
868 | manager_kill_workers(manager); | |
869 | } | |
870 | ||
871 | /* reload requested, HUP signal received, rules changed, builtin changed */ | |
872 | static void manager_reload(Manager *manager) { | |
873 | ||
874 | assert(manager); | |
875 | ||
b79aacbf TG |
876 | sd_notify(false, |
877 | "RELOADING=1\n" | |
878 | "STATUS=Flushing configuration..."); | |
879 | ||
62d43dac | 880 | manager_kill_workers(manager); |
981fae90 | 881 | manager->rules = udev_rules_free(manager->rules); |
2024ed61 | 882 | udev_builtin_exit(); |
b79aacbf | 883 | |
1ef72b55 MS |
884 | sd_notifyf(false, |
885 | "READY=1\n" | |
886 | "STATUS=Processing with %u children at max", arg_children_max); | |
62d43dac TG |
887 | } |
888 | ||
eca195ec YW |
889 | static int on_kill_workers_event(sd_event_source *s, uint64_t usec, void *userdata) { |
890 | Manager *manager = userdata; | |
891 | ||
892 | assert(manager); | |
893 | ||
894 | log_debug("Cleanup idle workers"); | |
895 | manager_kill_workers(manager); | |
896 | ||
897 | return 1; | |
898 | } | |
899 | ||
c0c6806b | 900 | static void event_queue_start(Manager *manager) { |
40a57716 | 901 | struct event *event; |
693d371d | 902 | usec_t usec; |
0725c4b9 | 903 | int r; |
8ab44e3f | 904 | |
c0c6806b TG |
905 | assert(manager); |
906 | ||
40a57716 | 907 | if (LIST_IS_EMPTY(manager->events) || |
7c4c7e89 TG |
908 | manager->exit || manager->stop_exec_queue) |
909 | return; | |
910 | ||
3285baa8 | 911 | assert_se(sd_event_now(manager->event, CLOCK_MONOTONIC, &usec) >= 0); |
38a03f06 LP |
912 | /* check for changed config, every 3 seconds at most */ |
913 | if (manager->last_usec == 0 || | |
33ad742a | 914 | usec - manager->last_usec > 3 * USEC_PER_SEC) { |
38a03f06 | 915 | if (udev_rules_check_timestamp(manager->rules) || |
2024ed61 | 916 | udev_builtin_validate()) |
38a03f06 | 917 | manager_reload(manager); |
693d371d | 918 | |
38a03f06 | 919 | manager->last_usec = usec; |
7c4c7e89 TG |
920 | } |
921 | ||
0725c4b9 YW |
922 | r = event_source_disable(manager->kill_workers_event); |
923 | if (r < 0) | |
924 | log_warning_errno(r, "Failed to disable event source for cleaning up idle workers, ignoring: %m"); | |
eca195ec | 925 | |
2024ed61 | 926 | udev_builtin_init(); |
7c4c7e89 TG |
927 | |
928 | if (!manager->rules) { | |
c238a1f5 | 929 | r = udev_rules_load(&manager->rules, arg_resolve_name_timing); |
1d791281 ZJS |
930 | if (r < 0) { |
931 | log_warning_errno(r, "Failed to read udev rules: %m"); | |
7c4c7e89 | 932 | return; |
1d791281 | 933 | } |
7c4c7e89 TG |
934 | } |
935 | ||
eb546b35 | 936 | LIST_FOREACH(event, event, manager->events) { |
912541b0 KS |
937 | if (event->state != EVENT_QUEUED) |
938 | continue; | |
0bc74ea7 | 939 | |
912541b0 | 940 | /* do not start event if parent or child event is still running */ |
eb546b35 | 941 | if (is_device_busy(manager, event) != 0) |
912541b0 | 942 | continue; |
fc465079 | 943 | |
c0c6806b | 944 | event_run(manager, event); |
912541b0 | 945 | } |
1e03b754 KS |
946 | } |
947 | ||
ecb17862 | 948 | static void event_queue_cleanup(Manager *manager, enum event_state match_type) { |
40a57716 | 949 | struct event *event, *tmp; |
ff2c503d | 950 | |
40a57716 | 951 | LIST_FOREACH_SAFE(event, event, tmp, manager->events) { |
912541b0 KS |
952 | if (match_type != EVENT_UNDEF && match_type != event->state) |
953 | continue; | |
ff2c503d | 954 | |
c6aa11f2 | 955 | event_free(event); |
912541b0 | 956 | } |
ff2c503d KS |
957 | } |
958 | ||
e82e8fa5 | 959 | static int on_worker(sd_event_source *s, int fd, uint32_t revents, void *userdata) { |
c0c6806b TG |
960 | Manager *manager = userdata; |
961 | ||
962 | assert(manager); | |
963 | ||
912541b0 KS |
964 | for (;;) { |
965 | struct worker_message msg; | |
979558f3 TG |
966 | struct iovec iovec = { |
967 | .iov_base = &msg, | |
968 | .iov_len = sizeof(msg), | |
969 | }; | |
fb29cdbe | 970 | CMSG_BUFFER_TYPE(CMSG_SPACE(sizeof(struct ucred))) control; |
979558f3 TG |
971 | struct msghdr msghdr = { |
972 | .msg_iov = &iovec, | |
973 | .msg_iovlen = 1, | |
974 | .msg_control = &control, | |
975 | .msg_controllen = sizeof(control), | |
976 | }; | |
912541b0 | 977 | ssize_t size; |
371d72e0 | 978 | struct ucred *ucred; |
a505965d | 979 | struct worker *worker; |
912541b0 | 980 | |
3691bcf3 LP |
981 | size = recvmsg_safe(fd, &msghdr, MSG_DONTWAIT); |
982 | if (size == -EINTR) | |
983 | continue; | |
984 | if (size == -EAGAIN) | |
985 | /* nothing more to read */ | |
986 | break; | |
987 | if (size < 0) | |
988 | return log_error_errno(size, "Failed to receive message: %m"); | |
989 | ||
990 | cmsg_close_all(&msghdr); | |
979558f3 | 991 | |
3691bcf3 | 992 | if (size != sizeof(struct worker_message)) { |
d4e98880 | 993 | log_warning("Ignoring worker message with invalid size %zi bytes", size); |
e82e8fa5 | 994 | continue; |
979558f3 TG |
995 | } |
996 | ||
371d72e0 | 997 | ucred = CMSG_FIND_DATA(&msghdr, SOL_SOCKET, SCM_CREDENTIALS, struct ucred); |
979558f3 | 998 | if (!ucred || ucred->pid <= 0) { |
d4e98880 | 999 | log_warning("Ignoring worker message without valid PID"); |
979558f3 TG |
1000 | continue; |
1001 | } | |
912541b0 KS |
1002 | |
1003 | /* lookup worker who sent the signal */ | |
4a0b58c4 | 1004 | worker = hashmap_get(manager->workers, PID_TO_PTR(ucred->pid)); |
a505965d | 1005 | if (!worker) { |
044497e2 | 1006 | log_debug("Worker ["PID_FMT"] returned, but is no longer tracked", ucred->pid); |
a505965d | 1007 | continue; |
912541b0 | 1008 | } |
c0bbfd72 | 1009 | |
a505965d TG |
1010 | if (worker->state != WORKER_KILLED) |
1011 | worker->state = WORKER_IDLE; | |
1012 | ||
1013 | /* worker returned */ | |
1014 | event_free(worker->event); | |
912541b0 | 1015 | } |
e82e8fa5 | 1016 | |
8302fe5a TG |
1017 | /* we have free workers, try to schedule events */ |
1018 | event_queue_start(manager); | |
1019 | ||
e82e8fa5 TG |
1020 | return 1; |
1021 | } | |
1022 | ||
f00d2b6d | 1023 | static int on_uevent(sd_device_monitor *monitor, sd_device *dev, void *userdata) { |
c0c6806b | 1024 | Manager *manager = userdata; |
e82e8fa5 TG |
1025 | int r; |
1026 | ||
c0c6806b | 1027 | assert(manager); |
e82e8fa5 | 1028 | |
7f2e3a14 YW |
1029 | device_ensure_usec_initialized(dev, NULL); |
1030 | ||
eb546b35 YW |
1031 | r = event_queue_insert(manager, dev); |
1032 | if (r < 0) { | |
1033 | log_device_error_errno(dev, r, "Failed to insert device into event queue: %m"); | |
7f2e3a14 | 1034 | return 1; |
eb546b35 | 1035 | } |
7f2e3a14 YW |
1036 | |
1037 | /* we have fresh events, try to schedule them */ | |
1038 | event_queue_start(manager); | |
e82e8fa5 TG |
1039 | |
1040 | return 1; | |
88f4b648 KS |
1041 | } |
1042 | ||
3b47c739 | 1043 | /* receive the udevd message from userspace */ |
d02c6f54 | 1044 | static int on_ctrl_msg(struct udev_ctrl *uctrl, enum udev_ctrl_msg_type type, const union udev_ctrl_msg_value *value, void *userdata) { |
c0c6806b | 1045 | Manager *manager = userdata; |
d02c6f54 | 1046 | int r; |
912541b0 | 1047 | |
d02c6f54 | 1048 | assert(value); |
c0c6806b | 1049 | assert(manager); |
e4f66b77 | 1050 | |
d02c6f54 YW |
1051 | switch (type) { |
1052 | case UDEV_CTRL_SET_LOG_LEVEL: | |
64a3494c | 1053 | log_debug("Received udev control message (SET_LOG_LEVEL), setting log_level=%i", value->intval); |
d02c6f54 YW |
1054 | log_set_max_level_realm(LOG_REALM_UDEV, value->intval); |
1055 | log_set_max_level_realm(LOG_REALM_SYSTEMD, value->intval); | |
c0c6806b | 1056 | manager_kill_workers(manager); |
d02c6f54 YW |
1057 | break; |
1058 | case UDEV_CTRL_STOP_EXEC_QUEUE: | |
044497e2 | 1059 | log_debug("Received udev control message (STOP_EXEC_QUEUE)"); |
c0c6806b | 1060 | manager->stop_exec_queue = true; |
d02c6f54 YW |
1061 | break; |
1062 | case UDEV_CTRL_START_EXEC_QUEUE: | |
044497e2 | 1063 | log_debug("Received udev control message (START_EXEC_QUEUE)"); |
c0c6806b | 1064 | manager->stop_exec_queue = false; |
8302fe5a | 1065 | event_queue_start(manager); |
d02c6f54 YW |
1066 | break; |
1067 | case UDEV_CTRL_RELOAD: | |
044497e2 | 1068 | log_debug("Received udev control message (RELOAD)"); |
62d43dac | 1069 | manager_reload(manager); |
d02c6f54 YW |
1070 | break; |
1071 | case UDEV_CTRL_SET_ENV: { | |
9b5150b6 | 1072 | _cleanup_free_ char *key = NULL, *val = NULL, *old_key = NULL, *old_val = NULL; |
d02c6f54 | 1073 | const char *eq; |
9b5150b6 | 1074 | |
d02c6f54 | 1075 | eq = strchr(value->buf, '='); |
9b5150b6 | 1076 | if (!eq) { |
d02c6f54 | 1077 | log_error("Invalid key format '%s'", value->buf); |
9b5150b6 YW |
1078 | return 1; |
1079 | } | |
1080 | ||
d02c6f54 | 1081 | key = strndup(value->buf, eq - value->buf); |
9b5150b6 YW |
1082 | if (!key) { |
1083 | log_oom(); | |
1084 | return 1; | |
1085 | } | |
1086 | ||
1087 | old_val = hashmap_remove2(manager->properties, key, (void **) &old_key); | |
1088 | ||
1089 | r = hashmap_ensure_allocated(&manager->properties, &string_hash_ops); | |
1090 | if (r < 0) { | |
1091 | log_oom(); | |
1092 | return 1; | |
912541b0 | 1093 | } |
9b5150b6 YW |
1094 | |
1095 | eq++; | |
f053fc33 | 1096 | if (isempty(eq)) { |
044497e2 | 1097 | log_debug("Received udev control message (ENV), unsetting '%s'", key); |
9b5150b6 YW |
1098 | |
1099 | r = hashmap_put(manager->properties, key, NULL); | |
1100 | if (r < 0) { | |
1101 | log_oom(); | |
1102 | return 1; | |
1103 | } | |
1104 | } else { | |
1105 | val = strdup(eq); | |
1106 | if (!val) { | |
1107 | log_oom(); | |
1108 | return 1; | |
1109 | } | |
1110 | ||
044497e2 | 1111 | log_debug("Received udev control message (ENV), setting '%s=%s'", key, val); |
9b5150b6 YW |
1112 | |
1113 | r = hashmap_put(manager->properties, key, val); | |
1114 | if (r < 0) { | |
1115 | log_oom(); | |
1116 | return 1; | |
1117 | } | |
1118 | } | |
1119 | ||
1120 | key = val = NULL; | |
c0c6806b | 1121 | manager_kill_workers(manager); |
d02c6f54 | 1122 | break; |
912541b0 | 1123 | } |
d02c6f54 YW |
1124 | case UDEV_CTRL_SET_CHILDREN_MAX: |
1125 | if (value->intval <= 0) { | |
1126 | log_debug("Received invalid udev control message (SET_MAX_CHILDREN, %i), ignoring.", value->intval); | |
1127 | return 0; | |
1128 | } | |
912541b0 | 1129 | |
d02c6f54 YW |
1130 | log_debug("Received udev control message (SET_MAX_CHILDREN), setting children_max=%i", value->intval); |
1131 | arg_children_max = value->intval; | |
1ef72b55 MS |
1132 | |
1133 | (void) sd_notifyf(false, | |
1134 | "READY=1\n" | |
1135 | "STATUS=Processing with %u children at max", arg_children_max); | |
d02c6f54 YW |
1136 | break; |
1137 | case UDEV_CTRL_PING: | |
d30f43ee | 1138 | log_debug("Received udev control message (PING)"); |
d02c6f54 YW |
1139 | break; |
1140 | case UDEV_CTRL_EXIT: | |
044497e2 | 1141 | log_debug("Received udev control message (EXIT)"); |
62d43dac | 1142 | manager_exit(manager); |
d02c6f54 YW |
1143 | break; |
1144 | default: | |
1145 | log_debug("Received unknown udev control message, ignoring"); | |
912541b0 | 1146 | } |
e4f66b77 | 1147 | |
e82e8fa5 | 1148 | return 1; |
88f4b648 | 1149 | } |
4a231017 | 1150 | |
0584b17a ZJS |
1151 | static int synthesize_change_one(sd_device *dev, const char *syspath) { |
1152 | const char *filename; | |
1153 | int r; | |
1154 | ||
1155 | filename = strjoina(syspath, "/uevent"); | |
1156 | log_device_debug(dev, "device is closed, synthesising 'change' on %s", syspath); | |
1157 | r = write_string_file(filename, "change", WRITE_STRING_FILE_DISABLE_BUFFER); | |
1158 | if (r < 0) | |
1159 | return log_device_debug_errno(dev, r, "Failed to write 'change' to %s: %m", filename); | |
1160 | return 0; | |
1161 | } | |
1162 | ||
70068602 YW |
1163 | static int synthesize_change(sd_device *dev) { |
1164 | const char *subsystem, *sysname, *devname, *syspath, *devtype; | |
f3a740a5 | 1165 | int r; |
edd32000 | 1166 | |
70068602 YW |
1167 | r = sd_device_get_subsystem(dev, &subsystem); |
1168 | if (r < 0) | |
1169 | return r; | |
1170 | ||
1171 | r = sd_device_get_sysname(dev, &sysname); | |
1172 | if (r < 0) | |
1173 | return r; | |
1174 | ||
1175 | r = sd_device_get_devname(dev, &devname); | |
1176 | if (r < 0) | |
1177 | return r; | |
1178 | ||
1179 | r = sd_device_get_syspath(dev, &syspath); | |
1180 | if (r < 0) | |
1181 | return r; | |
1182 | ||
1183 | r = sd_device_get_devtype(dev, &devtype); | |
1184 | if (r < 0) | |
1185 | return r; | |
1186 | ||
1187 | if (streq_ptr("block", subsystem) && | |
1188 | streq_ptr("disk", devtype) && | |
1189 | !startswith(sysname, "dm-")) { | |
1190 | _cleanup_(sd_device_enumerator_unrefp) sd_device_enumerator *e = NULL; | |
1191 | bool part_table_read = false, has_partitions = false; | |
1192 | sd_device *d; | |
ede34445 | 1193 | int fd; |
f3a740a5 | 1194 | |
ede34445 | 1195 | /* |
e9fc29f4 KS |
1196 | * Try to re-read the partition table. This only succeeds if |
1197 | * none of the devices is busy. The kernel returns 0 if no | |
1198 | * partition table is found, and we will not get an event for | |
1199 | * the disk. | |
ede34445 | 1200 | */ |
70068602 | 1201 | fd = open(devname, O_RDONLY|O_CLOEXEC|O_NOFOLLOW|O_NONBLOCK); |
ede34445 | 1202 | if (fd >= 0) { |
02ba8fb3 KS |
1203 | r = flock(fd, LOCK_EX|LOCK_NB); |
1204 | if (r >= 0) | |
1205 | r = ioctl(fd, BLKRRPART, 0); | |
1206 | ||
ede34445 KS |
1207 | close(fd); |
1208 | if (r >= 0) | |
e9fc29f4 | 1209 | part_table_read = true; |
ede34445 KS |
1210 | } |
1211 | ||
e9fc29f4 | 1212 | /* search for partitions */ |
70068602 | 1213 | r = sd_device_enumerator_new(&e); |
f3a740a5 KS |
1214 | if (r < 0) |
1215 | return r; | |
1216 | ||
70068602 | 1217 | r = sd_device_enumerator_allow_uninitialized(e); |
f3a740a5 KS |
1218 | if (r < 0) |
1219 | return r; | |
1220 | ||
70068602 | 1221 | r = sd_device_enumerator_add_match_parent(e, dev); |
47a3fa0f TA |
1222 | if (r < 0) |
1223 | return r; | |
e9fc29f4 | 1224 | |
70068602 YW |
1225 | r = sd_device_enumerator_add_match_subsystem(e, "block", true); |
1226 | if (r < 0) | |
1227 | return r; | |
e9fc29f4 | 1228 | |
70068602 YW |
1229 | FOREACH_DEVICE(e, d) { |
1230 | const char *t; | |
e9fc29f4 | 1231 | |
70068602 YW |
1232 | if (sd_device_get_devtype(d, &t) < 0 || |
1233 | !streq("partition", t)) | |
e9fc29f4 KS |
1234 | continue; |
1235 | ||
1236 | has_partitions = true; | |
1237 | break; | |
1238 | } | |
1239 | ||
1240 | /* | |
1241 | * We have partitions and re-read the table, the kernel already sent | |
1242 | * out a "change" event for the disk, and "remove/add" for all | |
1243 | * partitions. | |
1244 | */ | |
1245 | if (part_table_read && has_partitions) | |
1246 | return 0; | |
1247 | ||
1248 | /* | |
1249 | * We have partitions but re-reading the partition table did not | |
1250 | * work, synthesize "change" for the disk and all partitions. | |
1251 | */ | |
0584b17a | 1252 | (void) synthesize_change_one(dev, syspath); |
e9fc29f4 | 1253 | |
70068602 YW |
1254 | FOREACH_DEVICE(e, d) { |
1255 | const char *t, *n, *s; | |
f3a740a5 | 1256 | |
70068602 YW |
1257 | if (sd_device_get_devtype(d, &t) < 0 || |
1258 | !streq("partition", t)) | |
f3a740a5 KS |
1259 | continue; |
1260 | ||
70068602 YW |
1261 | if (sd_device_get_devname(d, &n) < 0 || |
1262 | sd_device_get_syspath(d, &s) < 0) | |
f3a740a5 KS |
1263 | continue; |
1264 | ||
0584b17a | 1265 | (void) synthesize_change_one(dev, s); |
f3a740a5 | 1266 | } |
ede34445 | 1267 | |
0584b17a ZJS |
1268 | } else |
1269 | (void) synthesize_change_one(dev, syspath); | |
ede34445 | 1270 | |
f3a740a5 | 1271 | return 0; |
edd32000 KS |
1272 | } |
1273 | ||
e82e8fa5 | 1274 | static int on_inotify(sd_event_source *s, int fd, uint32_t revents, void *userdata) { |
c0c6806b | 1275 | Manager *manager = userdata; |
0254e944 | 1276 | union inotify_event_buffer buffer; |
f7c1ad4f LP |
1277 | struct inotify_event *e; |
1278 | ssize_t l; | |
0725c4b9 | 1279 | int r; |
912541b0 | 1280 | |
c0c6806b | 1281 | assert(manager); |
e82e8fa5 | 1282 | |
0725c4b9 YW |
1283 | r = event_source_disable(manager->kill_workers_event); |
1284 | if (r < 0) | |
1285 | log_warning_errno(r, "Failed to disable event source for cleaning up idle workers, ignoring: %m"); | |
eca195ec | 1286 | |
e82e8fa5 | 1287 | l = read(fd, &buffer, sizeof(buffer)); |
f7c1ad4f | 1288 | if (l < 0) { |
3742095b | 1289 | if (IN_SET(errno, EAGAIN, EINTR)) |
e82e8fa5 | 1290 | return 1; |
912541b0 | 1291 | |
f7c1ad4f | 1292 | return log_error_errno(errno, "Failed to read inotify fd: %m"); |
912541b0 KS |
1293 | } |
1294 | ||
f7c1ad4f | 1295 | FOREACH_INOTIFY_EVENT(e, buffer, l) { |
70068602 YW |
1296 | _cleanup_(sd_device_unrefp) sd_device *dev = NULL; |
1297 | const char *devnode; | |
1298 | ||
7fe3324c | 1299 | if (udev_watch_lookup(e->wd, &dev) <= 0) |
70068602 | 1300 | continue; |
912541b0 | 1301 | |
70068602 | 1302 | if (sd_device_get_devname(dev, &devnode) < 0) |
edd32000 | 1303 | continue; |
912541b0 | 1304 | |
7fe3324c | 1305 | log_device_debug(dev, "Inotify event: %x for %s", e->mask, devnode); |
da143134 | 1306 | if (e->mask & IN_CLOSE_WRITE) |
edd32000 | 1307 | synthesize_change(dev); |
da143134 | 1308 | else if (e->mask & IN_IGNORED) |
2024ed61 | 1309 | udev_watch_end(dev); |
912541b0 KS |
1310 | } |
1311 | ||
e82e8fa5 | 1312 | return 1; |
bd284db1 SJR |
1313 | } |
1314 | ||
0561329d | 1315 | static int on_sigterm(sd_event_source *s, const struct signalfd_siginfo *si, void *userdata) { |
c0c6806b TG |
1316 | Manager *manager = userdata; |
1317 | ||
1318 | assert(manager); | |
1319 | ||
62d43dac | 1320 | manager_exit(manager); |
912541b0 | 1321 | |
e82e8fa5 TG |
1322 | return 1; |
1323 | } | |
912541b0 | 1324 | |
0561329d | 1325 | static int on_sighup(sd_event_source *s, const struct signalfd_siginfo *si, void *userdata) { |
c0c6806b TG |
1326 | Manager *manager = userdata; |
1327 | ||
1328 | assert(manager); | |
1329 | ||
62d43dac | 1330 | manager_reload(manager); |
912541b0 | 1331 | |
e82e8fa5 TG |
1332 | return 1; |
1333 | } | |
912541b0 | 1334 | |
e82e8fa5 | 1335 | static int on_sigchld(sd_event_source *s, const struct signalfd_siginfo *si, void *userdata) { |
c0c6806b | 1336 | Manager *manager = userdata; |
0725c4b9 | 1337 | int r; |
c0c6806b TG |
1338 | |
1339 | assert(manager); | |
1340 | ||
e82e8fa5 TG |
1341 | for (;;) { |
1342 | pid_t pid; | |
1343 | int status; | |
1344 | struct worker *worker; | |
d1317d02 | 1345 | |
e82e8fa5 TG |
1346 | pid = waitpid(-1, &status, WNOHANG); |
1347 | if (pid <= 0) | |
f29328d6 | 1348 | break; |
e82e8fa5 | 1349 | |
4a0b58c4 | 1350 | worker = hashmap_get(manager->workers, PID_TO_PTR(pid)); |
e82e8fa5 | 1351 | if (!worker) { |
dc7faf2a | 1352 | log_warning("Worker ["PID_FMT"] is unknown, ignoring", pid); |
f29328d6 | 1353 | continue; |
912541b0 | 1354 | } |
e82e8fa5 TG |
1355 | |
1356 | if (WIFEXITED(status)) { | |
1357 | if (WEXITSTATUS(status) == 0) | |
dc7faf2a | 1358 | log_debug("Worker ["PID_FMT"] exited", pid); |
e82e8fa5 | 1359 | else |
dc7faf2a | 1360 | log_warning("Worker ["PID_FMT"] exited with return code %i", pid, WEXITSTATUS(status)); |
33ad742a | 1361 | } else if (WIFSIGNALED(status)) |
dc7faf2a | 1362 | log_warning("Worker ["PID_FMT"] terminated by signal %i (%s)", pid, WTERMSIG(status), signal_to_string(WTERMSIG(status))); |
33ad742a | 1363 | else if (WIFSTOPPED(status)) { |
dc7faf2a | 1364 | log_info("Worker ["PID_FMT"] stopped", pid); |
f29328d6 | 1365 | continue; |
e82e8fa5 | 1366 | } else if (WIFCONTINUED(status)) { |
dc7faf2a | 1367 | log_info("Worker ["PID_FMT"] continued", pid); |
f29328d6 | 1368 | continue; |
e82e8fa5 | 1369 | } else |
dc7faf2a | 1370 | log_warning("Worker ["PID_FMT"] exit with status 0x%04x", pid, status); |
e82e8fa5 | 1371 | |
05e6d9c6 | 1372 | if ((!WIFEXITED(status) || WEXITSTATUS(status) != 0) && worker->event) { |
eb546b35 | 1373 | log_device_error(worker->event->dev, "Worker ["PID_FMT"] failed", pid); |
dc7faf2a | 1374 | |
05e6d9c6 | 1375 | /* delete state from disk */ |
eb546b35 YW |
1376 | device_delete_db(worker->event->dev); |
1377 | device_tag_index(worker->event->dev, NULL, false); | |
dc7faf2a | 1378 | |
030f4571 MW |
1379 | if (manager->monitor) { |
1380 | /* forward kernel event without amending it */ | |
1381 | r = device_monitor_send_device(manager->monitor, NULL, worker->event->dev_kernel); | |
1382 | if (r < 0) | |
1383 | log_device_error_errno(worker->event->dev_kernel, r, "Failed to send back device to kernel: %m"); | |
1384 | } | |
e82e8fa5 TG |
1385 | } |
1386 | ||
1387 | worker_free(worker); | |
912541b0 | 1388 | } |
e82e8fa5 | 1389 | |
8302fe5a TG |
1390 | /* we can start new workers, try to schedule events */ |
1391 | event_queue_start(manager); | |
1392 | ||
eca195ec | 1393 | /* Disable unnecessary cleanup event */ |
0725c4b9 YW |
1394 | if (hashmap_isempty(manager->workers)) { |
1395 | r = event_source_disable(manager->kill_workers_event); | |
1396 | if (r < 0) | |
1397 | log_warning_errno(r, "Failed to disable event source for cleaning up idle workers, ignoring: %m"); | |
1398 | } | |
eca195ec | 1399 | |
e82e8fa5 | 1400 | return 1; |
f27125f9 | 1401 | } |
1402 | ||
693d371d TG |
1403 | static int on_post(sd_event_source *s, void *userdata) { |
1404 | Manager *manager = userdata; | |
693d371d TG |
1405 | |
1406 | assert(manager); | |
1407 | ||
b6107f01 YW |
1408 | if (!LIST_IS_EMPTY(manager->events)) |
1409 | return 1; | |
1410 | ||
1411 | /* There are no pending events. Let's cleanup idle process. */ | |
1412 | ||
1413 | if (!hashmap_isempty(manager->workers)) { | |
1414 | /* There are idle workers */ | |
6d63048a YW |
1415 | (void) event_reset_time(manager->event, &manager->kill_workers_event, CLOCK_MONOTONIC, |
1416 | now(CLOCK_MONOTONIC) + 3 * USEC_PER_SEC, USEC_PER_SEC, | |
1417 | on_kill_workers_event, manager, 0, "kill-workers-event", false); | |
b6107f01 | 1418 | return 1; |
693d371d TG |
1419 | } |
1420 | ||
b6107f01 YW |
1421 | /* There are no idle workers. */ |
1422 | ||
1423 | if (manager->exit) | |
1424 | return sd_event_exit(manager->event, 0); | |
1425 | ||
1426 | if (manager->cgroup) | |
1427 | /* cleanup possible left-over processes in our cgroup */ | |
1428 | (void) cg_kill(SYSTEMD_CGROUP_CONTROLLER, manager->cgroup, SIGKILL, CGROUP_IGNORE_SELF, NULL, NULL, NULL); | |
1429 | ||
693d371d TG |
1430 | return 1; |
1431 | } | |
1432 | ||
c4b69e99 | 1433 | static int listen_fds(int *ret_ctrl, int *ret_netlink) { |
fcff1e72 | 1434 | int ctrl_fd = -1, netlink_fd = -1; |
c4b69e99 | 1435 | int fd, n; |
912541b0 | 1436 | |
c4b69e99 YW |
1437 | assert(ret_ctrl); |
1438 | assert(ret_netlink); | |
fcff1e72 | 1439 | |
912541b0 | 1440 | n = sd_listen_fds(true); |
fcff1e72 TG |
1441 | if (n < 0) |
1442 | return n; | |
912541b0 KS |
1443 | |
1444 | for (fd = SD_LISTEN_FDS_START; fd < n + SD_LISTEN_FDS_START; fd++) { | |
c52cff07 | 1445 | if (sd_is_socket(fd, AF_LOCAL, SOCK_SEQPACKET, -1) > 0) { |
fcff1e72 TG |
1446 | if (ctrl_fd >= 0) |
1447 | return -EINVAL; | |
1448 | ctrl_fd = fd; | |
912541b0 KS |
1449 | continue; |
1450 | } | |
1451 | ||
c52cff07 | 1452 | if (sd_is_socket(fd, AF_NETLINK, SOCK_RAW, -1) > 0) { |
fcff1e72 TG |
1453 | if (netlink_fd >= 0) |
1454 | return -EINVAL; | |
1455 | netlink_fd = fd; | |
912541b0 KS |
1456 | continue; |
1457 | } | |
1458 | ||
fcff1e72 | 1459 | return -EINVAL; |
912541b0 KS |
1460 | } |
1461 | ||
c4b69e99 YW |
1462 | *ret_ctrl = ctrl_fd; |
1463 | *ret_netlink = netlink_fd; | |
912541b0 | 1464 | |
912541b0 | 1465 | return 0; |
7459bcdc KS |
1466 | } |
1467 | ||
e6f86cac | 1468 | /* |
3f85ef0f | 1469 | * read the kernel command line, in case we need to get into debug mode |
64a3494c | 1470 | * udev.log_level=<level> syslog priority |
1d84ad94 LP |
1471 | * udev.children_max=<number of workers> events are fully serialized if set to 1 |
1472 | * udev.exec_delay=<number of seconds> delay execution of every executed program | |
1473 | * udev.event_timeout=<number of seconds> seconds to wait before terminating an event | |
95ac5230 | 1474 | * udev.blockdev_read_only<=bool> mark all block devices read-only when they appear |
e6f86cac | 1475 | */ |
96287a49 | 1476 | static int parse_proc_cmdline_item(const char *key, const char *value, void *data) { |
95ac5230 | 1477 | int r; |
e6f86cac | 1478 | |
614a823c | 1479 | assert(key); |
e6f86cac | 1480 | |
64a3494c FB |
1481 | if (proc_cmdline_key_streq(key, "udev.log_level") || |
1482 | proc_cmdline_key_streq(key, "udev.log_priority")) { /* kept for backward compatibility */ | |
1d84ad94 LP |
1483 | |
1484 | if (proc_cmdline_value_missing(key, value)) | |
1485 | return 0; | |
1486 | ||
46f0fbd8 | 1487 | r = log_level_from_string(value); |
92e72467 ZJS |
1488 | if (r >= 0) |
1489 | log_set_max_level(r); | |
1d84ad94 LP |
1490 | |
1491 | } else if (proc_cmdline_key_streq(key, "udev.event_timeout")) { | |
1492 | ||
1493 | if (proc_cmdline_value_missing(key, value)) | |
1494 | return 0; | |
1495 | ||
9d9264ba | 1496 | r = parse_sec(value, &arg_event_timeout_usec); |
1d84ad94 LP |
1497 | |
1498 | } else if (proc_cmdline_key_streq(key, "udev.children_max")) { | |
1499 | ||
1500 | if (proc_cmdline_value_missing(key, value)) | |
1501 | return 0; | |
1502 | ||
020328e1 | 1503 | r = safe_atou(value, &arg_children_max); |
1d84ad94 LP |
1504 | |
1505 | } else if (proc_cmdline_key_streq(key, "udev.exec_delay")) { | |
1506 | ||
1507 | if (proc_cmdline_value_missing(key, value)) | |
1508 | return 0; | |
1509 | ||
6b92f429 | 1510 | r = parse_sec(value, &arg_exec_delay_usec); |
1d84ad94 | 1511 | |
e2099267 | 1512 | } else if (proc_cmdline_key_streq(key, "udev.timeout_signal")) { |
95ac5230 | 1513 | |
e2099267 MS |
1514 | if (proc_cmdline_value_missing(key, value)) |
1515 | return 0; | |
1516 | ||
1517 | r = signal_from_string(value); | |
1518 | if (r > 0) | |
1519 | arg_timeout_signal = r; | |
95ac5230 LP |
1520 | |
1521 | } else if (proc_cmdline_key_streq(key, "udev.blockdev_read_only")) { | |
1522 | ||
1523 | if (!value) | |
1524 | arg_blockdev_read_only = true; | |
1525 | else { | |
1526 | r = parse_boolean(value); | |
1527 | if (r < 0) | |
1528 | log_warning_errno(r, "Failed to parse udev.blockdev-read-only argument, ignoring: %s", value); | |
1529 | else | |
1530 | arg_blockdev_read_only = r; | |
1531 | } | |
1532 | ||
1533 | if (arg_blockdev_read_only) | |
1534 | log_notice("All physical block devices will be marked read-only."); | |
1535 | ||
1536 | return 0; | |
1537 | ||
1538 | } else { | |
1539 | if (startswith(key, "udev.")) | |
1540 | log_warning("Unknown udev kernel command line option \"%s\", ignoring.", key); | |
1541 | ||
1542 | return 0; | |
1543 | } | |
614a823c | 1544 | |
92e72467 ZJS |
1545 | if (r < 0) |
1546 | log_warning_errno(r, "Failed to parse \"%s=%s\", ignoring: %m", key, value); | |
1d84ad94 | 1547 | |
614a823c | 1548 | return 0; |
e6f86cac KS |
1549 | } |
1550 | ||
37ec0fdd LP |
1551 | static int help(void) { |
1552 | _cleanup_free_ char *link = NULL; | |
1553 | int r; | |
1554 | ||
1555 | r = terminal_urlify_man("systemd-udevd.service", "8", &link); | |
1556 | if (r < 0) | |
1557 | return log_oom(); | |
1558 | ||
ed216e1f | 1559 | printf("%s [OPTIONS...]\n\n" |
d1109e12 | 1560 | "Rule-based manager for device events and files.\n\n" |
5ac0162c | 1561 | " -h --help Print this message\n" |
2d19c17e MF |
1562 | " -V --version Print version of the program\n" |
1563 | " -d --daemon Detach and run in the background\n" | |
1564 | " -D --debug Enable debug output\n" | |
1565 | " -c --children-max=INT Set maximum number of workers\n" | |
1566 | " -e --exec-delay=SECONDS Seconds to wait before executing RUN=\n" | |
1567 | " -t --event-timeout=SECONDS Seconds to wait before terminating an event\n" | |
1568 | " -N --resolve-names=early|late|never\n" | |
5ac0162c | 1569 | " When to resolve users and groups\n" |
37ec0fdd LP |
1570 | "\nSee the %s for details.\n" |
1571 | , program_invocation_short_name | |
1572 | , link | |
1573 | ); | |
1574 | ||
1575 | return 0; | |
ed216e1f TG |
1576 | } |
1577 | ||
bba7a484 | 1578 | static int parse_argv(int argc, char *argv[]) { |
e2099267 MS |
1579 | enum { |
1580 | ARG_TIMEOUT_SIGNAL, | |
1581 | }; | |
1582 | ||
912541b0 | 1583 | static const struct option options[] = { |
e2099267 MS |
1584 | { "daemon", no_argument, NULL, 'd' }, |
1585 | { "debug", no_argument, NULL, 'D' }, | |
1586 | { "children-max", required_argument, NULL, 'c' }, | |
1587 | { "exec-delay", required_argument, NULL, 'e' }, | |
1588 | { "event-timeout", required_argument, NULL, 't' }, | |
1589 | { "resolve-names", required_argument, NULL, 'N' }, | |
1590 | { "help", no_argument, NULL, 'h' }, | |
1591 | { "version", no_argument, NULL, 'V' }, | |
1592 | { "timeout-signal", required_argument, NULL, ARG_TIMEOUT_SIGNAL }, | |
912541b0 KS |
1593 | {} |
1594 | }; | |
689a97f5 | 1595 | |
044497e2 | 1596 | int c, r; |
689a97f5 | 1597 | |
bba7a484 TG |
1598 | assert(argc >= 0); |
1599 | assert(argv); | |
912541b0 | 1600 | |
e14b6f21 | 1601 | while ((c = getopt_long(argc, argv, "c:de:Dt:N:hV", options, NULL)) >= 0) { |
bba7a484 | 1602 | switch (c) { |
912541b0 | 1603 | |
912541b0 | 1604 | case 'd': |
bba7a484 | 1605 | arg_daemonize = true; |
912541b0 KS |
1606 | break; |
1607 | case 'c': | |
020328e1 | 1608 | r = safe_atou(optarg, &arg_children_max); |
6f5cf8a8 | 1609 | if (r < 0) |
389f9bf2 | 1610 | log_warning_errno(r, "Failed to parse --children-max= value '%s', ignoring: %m", optarg); |
912541b0 KS |
1611 | break; |
1612 | case 'e': | |
6b92f429 | 1613 | r = parse_sec(optarg, &arg_exec_delay_usec); |
6f5cf8a8 | 1614 | if (r < 0) |
6b92f429 | 1615 | log_warning_errno(r, "Failed to parse --exec-delay= value '%s', ignoring: %m", optarg); |
912541b0 | 1616 | break; |
e2099267 MS |
1617 | case ARG_TIMEOUT_SIGNAL: |
1618 | r = signal_from_string(optarg); | |
1619 | if (r <= 0) | |
1620 | log_warning_errno(r, "Failed to parse --timeout-signal= value '%s', ignoring: %m", optarg); | |
1621 | else | |
1622 | arg_timeout_signal = r; | |
1623 | ||
1624 | break; | |
9719859c | 1625 | case 't': |
9d9264ba | 1626 | r = parse_sec(optarg, &arg_event_timeout_usec); |
f1e8664e | 1627 | if (r < 0) |
9d9264ba | 1628 | log_warning_errno(r, "Failed to parse --event-timeout= value '%s', ignoring: %m", optarg); |
9719859c | 1629 | break; |
912541b0 | 1630 | case 'D': |
bba7a484 | 1631 | arg_debug = true; |
912541b0 | 1632 | break; |
c4d44cba YW |
1633 | case 'N': { |
1634 | ResolveNameTiming t; | |
1635 | ||
1636 | t = resolve_name_timing_from_string(optarg); | |
1637 | if (t < 0) | |
1638 | log_warning("Invalid --resolve-names= value '%s', ignoring.", optarg); | |
1639 | else | |
1640 | arg_resolve_name_timing = t; | |
912541b0 | 1641 | break; |
c4d44cba | 1642 | } |
912541b0 | 1643 | case 'h': |
37ec0fdd | 1644 | return help(); |
912541b0 | 1645 | case 'V': |
681bd2c5 | 1646 | printf("%s\n", GIT_VERSION); |
bba7a484 TG |
1647 | return 0; |
1648 | case '?': | |
1649 | return -EINVAL; | |
912541b0 | 1650 | default: |
bba7a484 TG |
1651 | assert_not_reached("Unhandled option"); |
1652 | ||
912541b0 KS |
1653 | } |
1654 | } | |
1655 | ||
bba7a484 TG |
1656 | return 1; |
1657 | } | |
1658 | ||
b7f74dd4 | 1659 | static int manager_new(Manager **ret, int fd_ctrl, int fd_uevent, const char *cgroup) { |
c0c6806b | 1660 | _cleanup_(manager_freep) Manager *manager = NULL; |
b5af8c8c | 1661 | int r; |
c0c6806b TG |
1662 | |
1663 | assert(ret); | |
1664 | ||
6f19b42f | 1665 | manager = new(Manager, 1); |
c0c6806b TG |
1666 | if (!manager) |
1667 | return log_oom(); | |
1668 | ||
6f19b42f YW |
1669 | *manager = (Manager) { |
1670 | .fd_inotify = -1, | |
1671 | .worker_watch = { -1, -1 }, | |
1672 | .cgroup = cgroup, | |
1673 | }; | |
e237d8cb | 1674 | |
100bc5bf YW |
1675 | r = udev_ctrl_new_from_fd(&manager->ctrl, fd_ctrl); |
1676 | if (r < 0) | |
1677 | return log_error_errno(r, "Failed to initialize udev control socket: %m"); | |
e237d8cb | 1678 | |
b5af8c8c ZJS |
1679 | r = udev_ctrl_enable_receiving(manager->ctrl); |
1680 | if (r < 0) | |
1681 | return log_error_errno(r, "Failed to bind udev control socket: %m"); | |
c4b69e99 | 1682 | |
7f2e3a14 YW |
1683 | r = device_monitor_new_full(&manager->monitor, MONITOR_GROUP_KERNEL, fd_uevent); |
1684 | if (r < 0) | |
1685 | return log_error_errno(r, "Failed to initialize device monitor: %m"); | |
e237d8cb | 1686 | |
1ffadeaa FB |
1687 | /* Bump receiver buffer, but only if we are not called via socket activation, as in that |
1688 | * case systemd sets the receive buffer size for us, and the value in the .socket unit | |
1689 | * should take full effect. */ | |
e77f52e5 YW |
1690 | if (fd_uevent < 0) { |
1691 | r = sd_device_monitor_set_receive_buffer_size(manager->monitor, 128 * 1024 * 1024); | |
1692 | if (r < 0) | |
1693 | log_warning_errno(r, "Failed to set receive buffer size for device monitor, ignoring: %m"); | |
1694 | } | |
c4b69e99 | 1695 | |
b5af8c8c ZJS |
1696 | r = device_monitor_enable_receiving(manager->monitor); |
1697 | if (r < 0) | |
1698 | return log_error_errno(r, "Failed to bind netlink socket: %m"); | |
1699 | ||
1700 | *ret = TAKE_PTR(manager); | |
1701 | ||
1702 | return 0; | |
1703 | } | |
1704 | ||
1705 | static int main_loop(Manager *manager) { | |
d02c6f54 | 1706 | int fd_worker, r; |
b5af8c8c | 1707 | |
76e62a4d YW |
1708 | manager->pid = getpid_cached(); |
1709 | ||
e237d8cb TG |
1710 | /* unnamed socket from workers to the main daemon */ |
1711 | r = socketpair(AF_LOCAL, SOCK_DGRAM|SOCK_CLOEXEC, 0, manager->worker_watch); | |
1712 | if (r < 0) | |
044497e2 | 1713 | return log_error_errno(errno, "Failed to create socketpair for communicating with workers: %m"); |
e237d8cb | 1714 | |
693d371d | 1715 | fd_worker = manager->worker_watch[READ_END]; |
e237d8cb | 1716 | |
2ff48e98 | 1717 | r = setsockopt_int(fd_worker, SOL_SOCKET, SO_PASSCRED, true); |
e237d8cb | 1718 | if (r < 0) |
044497e2 | 1719 | return log_error_errno(r, "Failed to enable SO_PASSCRED: %m"); |
e237d8cb | 1720 | |
b7759e04 YW |
1721 | r = udev_watch_init(); |
1722 | if (r < 0) | |
1723 | return log_error_errno(r, "Failed to create inotify descriptor: %m"); | |
1724 | manager->fd_inotify = r; | |
e237d8cb | 1725 | |
2024ed61 | 1726 | udev_watch_restore(); |
e237d8cb TG |
1727 | |
1728 | /* block and listen to all signals on signalfd */ | |
72c0a2c2 | 1729 | assert_se(sigprocmask_many(SIG_BLOCK, NULL, SIGTERM, SIGINT, SIGHUP, SIGCHLD, -1) >= 0); |
693d371d | 1730 | |
49f997f3 TG |
1731 | r = sd_event_default(&manager->event); |
1732 | if (r < 0) | |
044497e2 | 1733 | return log_error_errno(r, "Failed to allocate event loop: %m"); |
49f997f3 | 1734 | |
693d371d TG |
1735 | r = sd_event_add_signal(manager->event, NULL, SIGINT, on_sigterm, manager); |
1736 | if (r < 0) | |
044497e2 | 1737 | return log_error_errno(r, "Failed to create SIGINT event source: %m"); |
693d371d TG |
1738 | |
1739 | r = sd_event_add_signal(manager->event, NULL, SIGTERM, on_sigterm, manager); | |
1740 | if (r < 0) | |
044497e2 | 1741 | return log_error_errno(r, "Failed to create SIGTERM event source: %m"); |
693d371d TG |
1742 | |
1743 | r = sd_event_add_signal(manager->event, NULL, SIGHUP, on_sighup, manager); | |
1744 | if (r < 0) | |
044497e2 | 1745 | return log_error_errno(r, "Failed to create SIGHUP event source: %m"); |
693d371d TG |
1746 | |
1747 | r = sd_event_add_signal(manager->event, NULL, SIGCHLD, on_sigchld, manager); | |
1748 | if (r < 0) | |
044497e2 | 1749 | return log_error_errno(r, "Failed to create SIGCHLD event source: %m"); |
693d371d TG |
1750 | |
1751 | r = sd_event_set_watchdog(manager->event, true); | |
1752 | if (r < 0) | |
044497e2 | 1753 | return log_error_errno(r, "Failed to create watchdog event source: %m"); |
693d371d | 1754 | |
d02c6f54 YW |
1755 | r = udev_ctrl_attach_event(manager->ctrl, manager->event); |
1756 | if (r < 0) | |
1757 | return log_error_errno(r, "Failed to attach event to udev control: %m"); | |
b5af8c8c | 1758 | |
d02c6f54 | 1759 | r = udev_ctrl_start(manager->ctrl, on_ctrl_msg, manager); |
693d371d | 1760 | if (r < 0) |
d02c6f54 | 1761 | return log_error_errno(r, "Failed to start device monitor: %m"); |
693d371d TG |
1762 | |
1763 | /* This needs to be after the inotify and uevent handling, to make sure | |
1764 | * that the ping is send back after fully processing the pending uevents | |
1765 | * (including the synthetic ones we may create due to inotify events). | |
1766 | */ | |
d02c6f54 | 1767 | r = sd_event_source_set_priority(udev_ctrl_get_event_source(manager->ctrl), SD_EVENT_PRIORITY_IDLE); |
693d371d | 1768 | if (r < 0) |
044497e2 | 1769 | return log_error_errno(r, "Failed to set IDLE event priority for udev control event source: %m"); |
693d371d TG |
1770 | |
1771 | r = sd_event_add_io(manager->event, &manager->inotify_event, manager->fd_inotify, EPOLLIN, on_inotify, manager); | |
1772 | if (r < 0) | |
044497e2 | 1773 | return log_error_errno(r, "Failed to create inotify event source: %m"); |
693d371d | 1774 | |
f00d2b6d YW |
1775 | r = sd_device_monitor_attach_event(manager->monitor, manager->event); |
1776 | if (r < 0) | |
1777 | return log_error_errno(r, "Failed to attach event to device monitor: %m"); | |
1778 | ||
1779 | r = sd_device_monitor_start(manager->monitor, on_uevent, manager); | |
693d371d | 1780 | if (r < 0) |
f00d2b6d YW |
1781 | return log_error_errno(r, "Failed to start device monitor: %m"); |
1782 | ||
1783 | (void) sd_event_source_set_description(sd_device_monitor_get_event_source(manager->monitor), "device-monitor"); | |
693d371d TG |
1784 | |
1785 | r = sd_event_add_io(manager->event, NULL, fd_worker, EPOLLIN, on_worker, manager); | |
1786 | if (r < 0) | |
044497e2 | 1787 | return log_error_errno(r, "Failed to create worker event source: %m"); |
693d371d TG |
1788 | |
1789 | r = sd_event_add_post(manager->event, NULL, on_post, manager); | |
1790 | if (r < 0) | |
044497e2 | 1791 | return log_error_errno(r, "Failed to create post event source: %m"); |
e237d8cb | 1792 | |
b5af8c8c | 1793 | udev_builtin_init(); |
077fc5e2 | 1794 | |
c238a1f5 | 1795 | r = udev_rules_load(&manager->rules, arg_resolve_name_timing); |
b5af8c8c ZJS |
1796 | if (!manager->rules) |
1797 | return log_error_errno(r, "Failed to read udev rules: %m"); | |
077fc5e2 DH |
1798 | |
1799 | r = udev_rules_apply_static_dev_perms(manager->rules); | |
1800 | if (r < 0) | |
044497e2 | 1801 | log_error_errno(r, "Failed to apply permissions on static device nodes: %m"); |
077fc5e2 | 1802 | |
1ef72b55 MS |
1803 | (void) sd_notifyf(false, |
1804 | "READY=1\n" | |
1805 | "STATUS=Processing with %u children at max", arg_children_max); | |
077fc5e2 DH |
1806 | |
1807 | r = sd_event_loop(manager->event); | |
44dcf454 | 1808 | if (r < 0) |
044497e2 | 1809 | log_error_errno(r, "Event loop failed: %m"); |
077fc5e2 | 1810 | |
077fc5e2 DH |
1811 | sd_notify(false, |
1812 | "STOPPING=1\n" | |
1813 | "STATUS=Shutting down..."); | |
077fc5e2 DH |
1814 | return r; |
1815 | } | |
1816 | ||
63e2d171 | 1817 | int run_udevd(int argc, char *argv[]) { |
c26d1879 | 1818 | _cleanup_free_ char *cgroup = NULL; |
b5af8c8c | 1819 | _cleanup_(manager_freep) Manager *manager = NULL; |
efa1606e | 1820 | int fd_ctrl = -1, fd_uevent = -1; |
e5d7bce1 | 1821 | int r; |
bba7a484 | 1822 | |
bba7a484 | 1823 | log_set_target(LOG_TARGET_AUTO); |
6b413782 | 1824 | log_open(); |
e2099267 | 1825 | udev_parse_config_full(&arg_children_max, &arg_exec_delay_usec, &arg_event_timeout_usec, &arg_resolve_name_timing, &arg_timeout_signal); |
bba7a484 | 1826 | log_parse_environment(); |
6b413782 | 1827 | log_open(); /* Done again to update after reading configuration. */ |
bba7a484 | 1828 | |
bba7a484 TG |
1829 | r = parse_argv(argc, argv); |
1830 | if (r <= 0) | |
0c5a109a | 1831 | return r; |
bba7a484 | 1832 | |
1d84ad94 | 1833 | r = proc_cmdline_parse(parse_proc_cmdline_item, NULL, PROC_CMDLINE_STRIP_RD_PREFIX); |
614a823c | 1834 | if (r < 0) |
044497e2 | 1835 | log_warning_errno(r, "Failed to parse kernel command line, ignoring: %m"); |
912541b0 | 1836 | |
78d3e041 KS |
1837 | if (arg_debug) { |
1838 | log_set_target(LOG_TARGET_CONSOLE); | |
bba7a484 | 1839 | log_set_max_level(LOG_DEBUG); |
78d3e041 | 1840 | } |
bba7a484 | 1841 | |
6174a243 YW |
1842 | log_set_max_level_realm(LOG_REALM_SYSTEMD, log_get_max_level()); |
1843 | ||
fba868fa LP |
1844 | r = must_be_root(); |
1845 | if (r < 0) | |
0c5a109a | 1846 | return r; |
912541b0 | 1847 | |
712cebf1 | 1848 | if (arg_children_max == 0) { |
fe56acd8 | 1849 | unsigned long cpu_limit, mem_limit, cpu_count = 1; |
d457ff83 | 1850 | |
fe56acd8 LP |
1851 | r = cpus_in_affinity_mask(); |
1852 | if (r < 0) | |
1853 | log_warning_errno(r, "Failed to determine number of local CPUs, ignoring: %m"); | |
1854 | else | |
1855 | cpu_count = r; | |
88bd5a32 FB |
1856 | |
1857 | cpu_limit = cpu_count * 2 + 16; | |
1858 | mem_limit = MAX(physical_memory() / (128UL*1024*1024), 10U); | |
912541b0 | 1859 | |
88bd5a32 FB |
1860 | arg_children_max = MIN(cpu_limit, mem_limit); |
1861 | arg_children_max = MIN(WORKER_NUM_MAX, arg_children_max); | |
e438c57a | 1862 | |
044497e2 | 1863 | log_debug("Set children_max to %u", arg_children_max); |
d457ff83 | 1864 | } |
912541b0 | 1865 | |
712cebf1 | 1866 | /* set umask before creating any file/directory */ |
712cebf1 | 1867 | umask(022); |
912541b0 | 1868 | |
c3dacc8b | 1869 | r = mac_selinux_init(); |
0c5a109a | 1870 | if (r < 0) |
a9ba0e32 | 1871 | return r; |
912541b0 | 1872 | |
dae8b82e | 1873 | r = mkdir_errno_wrapper("/run/udev", 0755); |
0c5a109a ZJS |
1874 | if (r < 0 && r != -EEXIST) |
1875 | return log_error_errno(r, "Failed to create /run/udev: %m"); | |
712cebf1 | 1876 | |
31cbd202 YW |
1877 | if (getppid() == 1 && sd_booted() > 0) { |
1878 | /* Get our own cgroup, we regularly kill everything udev has left behind. | |
1879 | * We only do this on systemd systems, and only if we are directly spawned | |
1880 | * by PID1. Otherwise we are not guaranteed to have a dedicated cgroup. */ | |
c26d1879 | 1881 | r = cg_pid_get_path(SYSTEMD_CGROUP_CONTROLLER, 0, &cgroup); |
11b9fb15 | 1882 | if (r < 0) { |
a2d61f07 | 1883 | if (IN_SET(r, -ENOENT, -ENOMEDIUM)) |
044497e2 | 1884 | log_debug_errno(r, "Dedicated cgroup not found: %m"); |
11b9fb15 | 1885 | else |
044497e2 | 1886 | log_warning_errno(r, "Failed to get cgroup: %m"); |
11b9fb15 | 1887 | } |
c26d1879 TG |
1888 | } |
1889 | ||
b7f74dd4 | 1890 | r = listen_fds(&fd_ctrl, &fd_uevent); |
0c5a109a ZJS |
1891 | if (r < 0) |
1892 | return log_error_errno(r, "Failed to listen on fds: %m"); | |
b7f74dd4 | 1893 | |
b5af8c8c ZJS |
1894 | r = manager_new(&manager, fd_ctrl, fd_uevent, cgroup); |
1895 | if (r < 0) | |
1896 | return log_error_errno(r, "Failed to create manager: %m"); | |
1897 | ||
bba7a484 | 1898 | if (arg_daemonize) { |
912541b0 | 1899 | pid_t pid; |
912541b0 | 1900 | |
b5af8c8c | 1901 | log_info("Starting version " GIT_VERSION); |
3cbb2057 | 1902 | |
40e749b5 | 1903 | /* connect /dev/null to stdin, stdout, stderr */ |
c76cf844 AK |
1904 | if (log_get_max_level() < LOG_DEBUG) { |
1905 | r = make_null_stdio(); | |
1906 | if (r < 0) | |
1907 | log_warning_errno(r, "Failed to redirect standard streams to /dev/null: %m"); | |
1908 | } | |
1909 | ||
912541b0 | 1910 | pid = fork(); |
0c5a109a ZJS |
1911 | if (pid < 0) |
1912 | return log_error_errno(errno, "Failed to fork daemon: %m"); | |
1913 | if (pid > 0) | |
1914 | /* parent */ | |
1915 | return 0; | |
912541b0 | 1916 | |
0c5a109a | 1917 | /* child */ |
ece0fe12 | 1918 | (void) setsid(); |
7500cd5e | 1919 | } |
912541b0 | 1920 | |
76e62a4d | 1921 | return main_loop(manager); |
7fafc032 | 1922 | } |