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Commit | Line | Data |
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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 TG |
253 | sd_event *e; |
254 | uint64_t usec; | |
693d371d | 255 | |
c6aa11f2 | 256 | assert(worker); |
693d371d | 257 | assert(worker->manager); |
c6aa11f2 TG |
258 | assert(event); |
259 | assert(!event->worker); | |
260 | assert(!worker->event); | |
261 | ||
39c19cf1 | 262 | worker->state = WORKER_RUNNING; |
39c19cf1 TG |
263 | worker->event = event; |
264 | event->state = EVENT_RUNNING; | |
c6aa11f2 | 265 | event->worker = worker; |
693d371d TG |
266 | |
267 | e = worker->manager->event; | |
268 | ||
3285baa8 | 269 | assert_se(sd_event_now(e, CLOCK_MONOTONIC, &usec) >= 0); |
693d371d | 270 | |
d8f462b4 | 271 | (void) sd_event_add_time(e, &event->timeout_warning_event, CLOCK_MONOTONIC, |
66f737b4 | 272 | usec + udev_warn_timeout(arg_event_timeout_usec), USEC_PER_SEC, on_event_timeout_warning, event); |
693d371d | 273 | |
d8f462b4 | 274 | (void) sd_event_add_time(e, &event->timeout_event, CLOCK_MONOTONIC, |
693d371d | 275 | usec + arg_event_timeout_usec, USEC_PER_SEC, on_event_timeout, event); |
39c19cf1 TG |
276 | } |
277 | ||
0bed242c YW |
278 | static void manager_clear_for_worker(Manager *manager) { |
279 | assert(manager); | |
280 | ||
0bed242c YW |
281 | manager->inotify_event = sd_event_source_unref(manager->inotify_event); |
282 | manager->kill_workers_event = sd_event_source_unref(manager->kill_workers_event); | |
283 | ||
284 | manager->event = sd_event_unref(manager->event); | |
285 | ||
956833b4 | 286 | manager->workers = hashmap_free(manager->workers); |
0bed242c YW |
287 | event_queue_cleanup(manager, EVENT_UNDEF); |
288 | ||
7f2e3a14 | 289 | manager->monitor = sd_device_monitor_unref(manager->monitor); |
0bed242c YW |
290 | manager->ctrl = udev_ctrl_unref(manager->ctrl); |
291 | ||
292 | manager->worker_watch[READ_END] = safe_close(manager->worker_watch[READ_END]); | |
293 | } | |
294 | ||
e237d8cb TG |
295 | static void manager_free(Manager *manager) { |
296 | if (!manager) | |
297 | return; | |
298 | ||
2024ed61 | 299 | udev_builtin_exit(); |
b2d21d93 | 300 | |
76e62a4d YW |
301 | if (manager->pid == getpid_cached()) |
302 | udev_ctrl_cleanup(manager->ctrl); | |
303 | ||
0bed242c | 304 | manager_clear_for_worker(manager); |
693d371d | 305 | |
0bed242c | 306 | sd_netlink_unref(manager->rtnl); |
e237d8cb | 307 | |
9b5150b6 | 308 | hashmap_free_free_free(manager->properties); |
981fae90 | 309 | udev_rules_free(manager->rules); |
e237d8cb | 310 | |
e237d8cb TG |
311 | safe_close(manager->fd_inotify); |
312 | safe_close_pair(manager->worker_watch); | |
313 | ||
314 | free(manager); | |
315 | } | |
316 | ||
317 | DEFINE_TRIVIAL_CLEANUP_FUNC(Manager*, manager_free); | |
318 | ||
9a73bd7c TG |
319 | static int worker_send_message(int fd) { |
320 | struct worker_message message = {}; | |
321 | ||
322 | return loop_write(fd, &message, sizeof(message), false); | |
323 | } | |
324 | ||
b97897e3 | 325 | static int worker_lock_block_device(sd_device *dev, int *ret_fd) { |
0bed242c | 326 | _cleanup_close_ int fd = -1; |
b97897e3 YW |
327 | const char *val; |
328 | int r; | |
fee854ee | 329 | |
0bed242c YW |
330 | assert(dev); |
331 | assert(ret_fd); | |
332 | ||
333 | /* | |
334 | * Take a shared lock on the device node; this establishes | |
335 | * a concept of device "ownership" to serialize device | |
336 | * access. External processes holding an exclusive lock will | |
337 | * cause udev to skip the event handling; in the case udev | |
338 | * acquired the lock, the external process can block until | |
339 | * udev has finished its event handling. | |
340 | */ | |
341 | ||
d4d690fa | 342 | if (device_for_action(dev, DEVICE_ACTION_REMOVE)) |
0bed242c YW |
343 | return 0; |
344 | ||
b97897e3 YW |
345 | r = sd_device_get_subsystem(dev, &val); |
346 | if (r < 0) | |
347 | return log_device_debug_errno(dev, r, "Failed to get subsystem: %m"); | |
348 | ||
349 | if (!streq(val, "block")) | |
0bed242c | 350 | return 0; |
fee854ee | 351 | |
b97897e3 YW |
352 | r = sd_device_get_sysname(dev, &val); |
353 | if (r < 0) | |
354 | return log_device_debug_errno(dev, r, "Failed to get sysname: %m"); | |
355 | ||
49fe5c09 | 356 | if (STARTSWITH_SET(val, "dm-", "md", "drbd")) |
0bed242c YW |
357 | return 0; |
358 | ||
b97897e3 YW |
359 | r = sd_device_get_devtype(dev, &val); |
360 | if (r < 0 && r != -ENOENT) | |
361 | return log_device_debug_errno(dev, r, "Failed to get devtype: %m"); | |
362 | if (r >= 0 && streq(val, "partition")) { | |
363 | r = sd_device_get_parent(dev, &dev); | |
364 | if (r < 0) | |
365 | return log_device_debug_errno(dev, r, "Failed to get parent device: %m"); | |
366 | } | |
0bed242c | 367 | |
b97897e3 YW |
368 | r = sd_device_get_devname(dev, &val); |
369 | if (r == -ENOENT) | |
0bed242c | 370 | return 0; |
b97897e3 YW |
371 | if (r < 0) |
372 | return log_device_debug_errno(dev, r, "Failed to get devname: %m"); | |
0bed242c | 373 | |
b97897e3 YW |
374 | fd = open(val, O_RDONLY|O_CLOEXEC|O_NOFOLLOW|O_NONBLOCK); |
375 | if (fd < 0) { | |
376 | log_device_debug_errno(dev, errno, "Failed to open '%s', ignoring: %m", val); | |
0bed242c | 377 | return 0; |
b97897e3 | 378 | } |
0bed242c YW |
379 | |
380 | if (flock(fd, LOCK_SH|LOCK_NB) < 0) | |
b97897e3 | 381 | return log_device_debug_errno(dev, errno, "Failed to flock(%s): %m", val); |
0bed242c YW |
382 | |
383 | *ret_fd = TAKE_FD(fd); | |
384 | return 1; | |
fee854ee RK |
385 | } |
386 | ||
95ac5230 LP |
387 | static int worker_mark_block_device_read_only(sd_device *dev) { |
388 | _cleanup_close_ int fd = -1; | |
389 | const char *val; | |
390 | int state = 1, r; | |
391 | ||
392 | assert(dev); | |
393 | ||
394 | if (!arg_blockdev_read_only) | |
395 | return 0; | |
396 | ||
397 | /* Do this only once, when the block device is new. If the device is later retriggered let's not | |
398 | * toggle the bit again, so that people can boot up with full read-only mode and then unset the bit | |
399 | * for specific devices only. */ | |
400 | if (!device_for_action(dev, DEVICE_ACTION_ADD)) | |
401 | return 0; | |
402 | ||
403 | r = sd_device_get_subsystem(dev, &val); | |
404 | if (r < 0) | |
405 | return log_device_debug_errno(dev, r, "Failed to get subsystem: %m"); | |
406 | ||
407 | if (!streq(val, "block")) | |
408 | return 0; | |
409 | ||
410 | r = sd_device_get_sysname(dev, &val); | |
411 | if (r < 0) | |
412 | return log_device_debug_errno(dev, r, "Failed to get sysname: %m"); | |
413 | ||
414 | /* Exclude synthetic devices for now, this is supposed to be a safety feature to avoid modification | |
415 | * of physical devices, and what sits on top of those doesn't really matter if we don't allow the | |
cb713f16 | 416 | * underlying block devices to receive changes. */ |
95ac5230 LP |
417 | if (STARTSWITH_SET(val, "dm-", "md", "drbd", "loop", "nbd", "zram")) |
418 | return 0; | |
419 | ||
420 | r = sd_device_get_devname(dev, &val); | |
421 | if (r == -ENOENT) | |
422 | return 0; | |
423 | if (r < 0) | |
424 | return log_device_debug_errno(dev, r, "Failed to get devname: %m"); | |
425 | ||
426 | fd = open(val, O_RDONLY|O_CLOEXEC|O_NOFOLLOW|O_NONBLOCK); | |
427 | if (fd < 0) | |
428 | return log_device_debug_errno(dev, errno, "Failed to open '%s', ignoring: %m", val); | |
429 | ||
430 | if (ioctl(fd, BLKROSET, &state) < 0) | |
431 | return log_device_warning_errno(dev, errno, "Failed to mark block device '%s' read-only: %m", val); | |
432 | ||
433 | log_device_info(dev, "Successfully marked block device '%s' read-only.", val); | |
434 | return 0; | |
435 | } | |
436 | ||
abde5ea8 | 437 | static int worker_process_device(Manager *manager, sd_device *dev) { |
2e088715 | 438 | _cleanup_(udev_event_freep) UdevEvent *udev_event = NULL; |
0bed242c | 439 | _cleanup_close_ int fd_lock = -1; |
d4d690fa YW |
440 | DeviceAction action; |
441 | uint64_t seqnum; | |
0bed242c | 442 | int r; |
912541b0 | 443 | |
0bed242c YW |
444 | assert(manager); |
445 | assert(dev); | |
446 | ||
d4d690fa | 447 | r = device_get_seqnum(dev, &seqnum); |
abde5ea8 | 448 | if (r < 0) |
25d4f5b0 | 449 | return log_device_debug_errno(dev, r, "Failed to get SEQNUM: %m"); |
abde5ea8 | 450 | |
d4d690fa | 451 | r = device_get_action(dev, &action); |
c0ff3d6c YW |
452 | if (r < 0) |
453 | return log_device_debug_errno(dev, r, "Failed to get ACTION: %m"); | |
454 | ||
d4d690fa YW |
455 | log_device_debug(dev, "Processing device (SEQNUM=%"PRIu64", ACTION=%s)", |
456 | seqnum, device_action_to_string(action)); | |
abde5ea8 YW |
457 | |
458 | udev_event = udev_event_new(dev, arg_exec_delay_usec, manager->rtnl); | |
0bed242c YW |
459 | if (!udev_event) |
460 | return -ENOMEM; | |
461 | ||
abde5ea8 | 462 | r = worker_lock_block_device(dev, &fd_lock); |
b6aab8ef | 463 | if (r < 0) |
0bed242c | 464 | return r; |
912541b0 | 465 | |
95ac5230 LP |
466 | (void) worker_mark_block_device_read_only(dev); |
467 | ||
0bed242c | 468 | /* apply rules, create node, symlinks */ |
e2099267 | 469 | r = udev_event_execute_rules(udev_event, arg_event_timeout_usec, arg_timeout_signal, manager->properties, manager->rules); |
99058cd6 YW |
470 | if (r < 0) |
471 | return r; | |
472 | ||
e2099267 | 473 | udev_event_execute_run(udev_event, arg_event_timeout_usec, arg_timeout_signal); |
2dd9f98d | 474 | |
0bed242c YW |
475 | if (!manager->rtnl) |
476 | /* in case rtnl was initialized */ | |
477 | manager->rtnl = sd_netlink_ref(udev_event->rtnl); | |
912541b0 | 478 | |
0bed242c YW |
479 | /* apply/restore inotify watch */ |
480 | if (udev_event->inotify_watch) { | |
abde5ea8 YW |
481 | (void) udev_watch_begin(dev); |
482 | r = device_update_db(dev); | |
483 | if (r < 0) | |
484 | return log_device_debug_errno(dev, r, "Failed to update database under /run/udev/data/: %m"); | |
0bed242c | 485 | } |
912541b0 | 486 | |
d4d690fa YW |
487 | log_device_debug(dev, "Device (SEQNUM=%"PRIu64", ACTION=%s) processed", |
488 | seqnum, device_action_to_string(action)); | |
912541b0 | 489 | |
0bed242c YW |
490 | return 0; |
491 | } | |
912541b0 | 492 | |
e2130348 YW |
493 | static int worker_device_monitor_handler(sd_device_monitor *monitor, sd_device *dev, void *userdata) { |
494 | Manager *manager = userdata; | |
495 | int r; | |
496 | ||
497 | assert(dev); | |
498 | assert(manager); | |
499 | ||
500 | r = worker_process_device(manager, dev); | |
5abee64e LP |
501 | if (r == -EAGAIN) |
502 | /* if we couldn't acquire the flock(), then proceed quietly */ | |
503 | log_device_debug_errno(dev, r, "Device currently locked, not processing."); | |
504 | else { | |
505 | if (r < 0) | |
506 | log_device_warning_errno(dev, r, "Failed to process device, ignoring: %m"); | |
e2130348 | 507 | |
5abee64e LP |
508 | /* send processed event back to libudev listeners */ |
509 | r = device_monitor_send_device(monitor, NULL, dev); | |
510 | if (r < 0) | |
511 | log_device_warning_errno(dev, r, "Failed to send device, ignoring: %m"); | |
512 | } | |
e2130348 YW |
513 | |
514 | /* send udevd the result of the event execution */ | |
515 | r = worker_send_message(manager->worker_watch[WRITE_END]); | |
516 | if (r < 0) | |
517 | log_device_warning_errno(dev, r, "Failed to send signal to main daemon, ignoring: %m"); | |
518 | ||
519 | return 1; | |
520 | } | |
521 | ||
7f2e3a14 YW |
522 | static int worker_main(Manager *_manager, sd_device_monitor *monitor, sd_device *first_device) { |
523 | _cleanup_(sd_device_unrefp) sd_device *dev = first_device; | |
0bed242c | 524 | _cleanup_(manager_freep) Manager *manager = _manager; |
44dcf454 | 525 | int r; |
145dae7e | 526 | |
0bed242c YW |
527 | assert(manager); |
528 | assert(monitor); | |
529 | assert(dev); | |
912541b0 | 530 | |
0bed242c | 531 | unsetenv("NOTIFY_SOCKET"); |
3b64e4d4 | 532 | |
e2130348 YW |
533 | assert_se(sigprocmask_many(SIG_BLOCK, NULL, SIGTERM, -1) >= 0); |
534 | ||
535 | /* Reset OOM score, we only protect the main daemon. */ | |
536 | r = set_oom_score_adjust(0); | |
537 | if (r < 0) | |
538 | log_debug_errno(r, "Failed to reset OOM score, ignoring: %m"); | |
912541b0 | 539 | |
e2130348 YW |
540 | /* Clear unnecessary data in Manager object.*/ |
541 | manager_clear_for_worker(manager); | |
3ebdb81e | 542 | |
e2130348 YW |
543 | r = sd_event_new(&manager->event); |
544 | if (r < 0) | |
545 | return log_error_errno(r, "Failed to allocate event loop: %m"); | |
912541b0 | 546 | |
e2130348 YW |
547 | r = sd_event_add_signal(manager->event, NULL, SIGTERM, NULL, NULL); |
548 | if (r < 0) | |
549 | return log_error_errno(r, "Failed to set SIGTERM event: %m"); | |
4c83d994 | 550 | |
e2130348 YW |
551 | r = sd_device_monitor_attach_event(monitor, manager->event); |
552 | if (r < 0) | |
553 | return log_error_errno(r, "Failed to attach event loop to device monitor: %m"); | |
912541b0 | 554 | |
e2130348 | 555 | r = sd_device_monitor_start(monitor, worker_device_monitor_handler, manager); |
0bed242c | 556 | if (r < 0) |
e2130348 | 557 | return log_error_errno(r, "Failed to start device monitor: %m"); |
912541b0 | 558 | |
e2130348 | 559 | (void) sd_event_source_set_description(sd_device_monitor_get_event_source(monitor), "worker-device-monitor"); |
b66f29a1 | 560 | |
e2130348 YW |
561 | /* Process first device */ |
562 | (void) worker_device_monitor_handler(monitor, dev, manager); | |
912541b0 | 563 | |
e2130348 YW |
564 | r = sd_event_loop(manager->event); |
565 | if (r < 0) | |
566 | return log_error_errno(r, "Event loop failed: %m"); | |
567 | ||
44dcf454 | 568 | return 0; |
0bed242c YW |
569 | } |
570 | ||
7443654e | 571 | static int worker_spawn(Manager *manager, struct event *event) { |
7f2e3a14 | 572 | _cleanup_(sd_device_monitor_unrefp) sd_device_monitor *worker_monitor = NULL; |
7443654e | 573 | struct worker *worker; |
0bed242c | 574 | pid_t pid; |
7443654e | 575 | int r; |
0bed242c YW |
576 | |
577 | /* listen for new events */ | |
7f2e3a14 YW |
578 | r = device_monitor_new_full(&worker_monitor, MONITOR_GROUP_NONE, -1); |
579 | if (r < 0) | |
580 | return r; | |
7443654e | 581 | |
0bed242c | 582 | /* allow the main daemon netlink address to send devices to the worker */ |
7f2e3a14 YW |
583 | r = device_monitor_allow_unicast_sender(worker_monitor, manager->monitor); |
584 | if (r < 0) | |
585 | return log_error_errno(r, "Worker: Failed to set unicast sender: %m"); | |
586 | ||
587 | r = device_monitor_enable_receiving(worker_monitor); | |
0bed242c | 588 | if (r < 0) |
7f2e3a14 | 589 | return log_error_errno(r, "Worker: Failed to enable receiving of device: %m"); |
0bed242c | 590 | |
ff86c92e | 591 | r = safe_fork(NULL, FORK_DEATHSIG, &pid); |
7443654e YW |
592 | if (r < 0) { |
593 | event->state = EVENT_QUEUED; | |
594 | return log_error_errno(r, "Failed to fork() worker: %m"); | |
595 | } | |
596 | if (r == 0) { | |
597 | /* Worker process */ | |
eb546b35 | 598 | r = worker_main(manager, worker_monitor, sd_device_ref(event->dev)); |
baa30fbc | 599 | log_close(); |
8b46c3fc | 600 | _exit(r < 0 ? EXIT_FAILURE : EXIT_SUCCESS); |
912541b0 | 601 | } |
e03c7cc2 | 602 | |
7443654e YW |
603 | r = worker_new(&worker, manager, worker_monitor, pid); |
604 | if (r < 0) | |
605 | return log_error_errno(r, "Failed to create worker object: %m"); | |
e03c7cc2 | 606 | |
7443654e | 607 | worker_attach_event(worker, event); |
39c19cf1 | 608 | |
eb546b35 | 609 | log_device_debug(event->dev, "Worker ["PID_FMT"] is forked for processing SEQNUM=%"PRIu64".", pid, event->seqnum); |
7443654e | 610 | return 0; |
7fafc032 KS |
611 | } |
612 | ||
c0c6806b | 613 | static void event_run(Manager *manager, struct event *event) { |
5406c368 | 614 | static bool log_children_max_reached = true; |
a505965d TG |
615 | struct worker *worker; |
616 | Iterator i; | |
7f2e3a14 | 617 | int r; |
912541b0 | 618 | |
c0c6806b TG |
619 | assert(manager); |
620 | assert(event); | |
621 | ||
7600dbb8 UKK |
622 | if (DEBUG_LOGGING) { |
623 | DeviceAction action; | |
624 | ||
625 | r = device_get_action(event->dev, &action); | |
626 | log_device_debug(event->dev, "Device (SEQNUM=%"PRIu64", ACTION=%s) ready for processing", | |
627 | event->seqnum, r >= 0 ? device_action_to_string(action) : "<unknown>"); | |
628 | } | |
629 | ||
c0c6806b | 630 | HASHMAP_FOREACH(worker, manager->workers, i) { |
912541b0 KS |
631 | if (worker->state != WORKER_IDLE) |
632 | continue; | |
633 | ||
eb546b35 | 634 | r = device_monitor_send_device(manager->monitor, worker->monitor, event->dev); |
7f2e3a14 | 635 | if (r < 0) { |
eb546b35 | 636 | log_device_error_errno(event->dev, r, "Worker ["PID_FMT"] did not accept message, killing the worker: %m", |
7f2e3a14 | 637 | worker->pid); |
cb542e84 | 638 | (void) kill(worker->pid, SIGKILL); |
912541b0 KS |
639 | worker->state = WORKER_KILLED; |
640 | continue; | |
641 | } | |
39c19cf1 | 642 | worker_attach_event(worker, event); |
912541b0 KS |
643 | return; |
644 | } | |
645 | ||
c0c6806b | 646 | if (hashmap_size(manager->workers) >= arg_children_max) { |
5406c368 FB |
647 | |
648 | /* Avoid spamming the debug logs if the limit is already reached and | |
649 | * many events still need to be processed */ | |
650 | if (log_children_max_reached && arg_children_max > 1) { | |
044497e2 | 651 | log_debug("Maximum number (%u) of children reached.", hashmap_size(manager->workers)); |
5406c368 FB |
652 | log_children_max_reached = false; |
653 | } | |
912541b0 KS |
654 | return; |
655 | } | |
656 | ||
5406c368 FB |
657 | /* Re-enable the debug message for the next batch of events */ |
658 | log_children_max_reached = true; | |
659 | ||
912541b0 | 660 | /* start new worker and pass initial device */ |
c0c6806b | 661 | worker_spawn(manager, event); |
1e03b754 KS |
662 | } |
663 | ||
eb546b35 YW |
664 | static int event_queue_insert(Manager *manager, sd_device *dev) { |
665 | _cleanup_(sd_device_unrefp) sd_device *clone = NULL; | |
912541b0 | 666 | struct event *event; |
d4d690fa | 667 | DeviceAction action; |
eb546b35 | 668 | uint64_t seqnum; |
cb49a4f2 | 669 | int r; |
912541b0 | 670 | |
ecb17862 TG |
671 | assert(manager); |
672 | assert(dev); | |
673 | ||
040e6896 | 674 | /* only one process can add events to the queue */ |
df0ff127 | 675 | assert(manager->pid == getpid_cached()); |
cb49a4f2 | 676 | |
eb546b35 | 677 | /* We only accepts devices received by device monitor. */ |
d4d690fa | 678 | r = device_get_seqnum(dev, &seqnum); |
eb546b35 YW |
679 | if (r < 0) |
680 | return r; | |
681 | ||
e0b7a5d1 | 682 | /* Refuse devices do not have ACTION property. */ |
d4d690fa | 683 | r = device_get_action(dev, &action); |
e0b7a5d1 YW |
684 | if (r < 0) |
685 | return r; | |
686 | ||
eb546b35 YW |
687 | /* Save original device to restore the state on failures. */ |
688 | r = device_shallow_clone(dev, &clone); | |
689 | if (r < 0) | |
690 | return r; | |
691 | ||
692 | r = device_copy_properties(clone, dev); | |
693 | if (r < 0) | |
694 | return r; | |
912541b0 | 695 | |
eb546b35 YW |
696 | event = new(struct event, 1); |
697 | if (!event) | |
698 | return -ENOMEM; | |
912541b0 | 699 | |
eb546b35 YW |
700 | *event = (struct event) { |
701 | .manager = manager, | |
702 | .dev = sd_device_ref(dev), | |
703 | .dev_kernel = TAKE_PTR(clone), | |
704 | .seqnum = seqnum, | |
705 | .state = EVENT_QUEUED, | |
706 | }; | |
cb49a4f2 | 707 | |
40a57716 | 708 | if (LIST_IS_EMPTY(manager->events)) { |
cb49a4f2 TG |
709 | r = touch("/run/udev/queue"); |
710 | if (r < 0) | |
044497e2 | 711 | log_warning_errno(r, "Failed to touch /run/udev/queue: %m"); |
cb49a4f2 TG |
712 | } |
713 | ||
40a57716 | 714 | LIST_APPEND(event, manager->events, event); |
cb49a4f2 | 715 | |
d4d690fa YW |
716 | log_device_debug(dev, "Device (SEQNUM=%"PRIu64", ACTION=%s) is queued", |
717 | seqnum, device_action_to_string(action)); | |
eb546b35 | 718 | |
912541b0 | 719 | return 0; |
fc465079 KS |
720 | } |
721 | ||
c0c6806b | 722 | static void manager_kill_workers(Manager *manager) { |
a505965d TG |
723 | struct worker *worker; |
724 | Iterator i; | |
1e03b754 | 725 | |
c0c6806b TG |
726 | assert(manager); |
727 | ||
728 | HASHMAP_FOREACH(worker, manager->workers, i) { | |
912541b0 KS |
729 | if (worker->state == WORKER_KILLED) |
730 | continue; | |
1e03b754 | 731 | |
912541b0 | 732 | worker->state = WORKER_KILLED; |
cb542e84 | 733 | (void) kill(worker->pid, SIGTERM); |
912541b0 | 734 | } |
1e03b754 KS |
735 | } |
736 | ||
e3196993 | 737 | /* lookup event for identical, parent, child device */ |
eb546b35 YW |
738 | static int is_device_busy(Manager *manager, struct event *event) { |
739 | const char *subsystem, *devpath, *devpath_old = NULL; | |
740 | dev_t devnum = makedev(0, 0); | |
40a57716 | 741 | struct event *loop_event; |
eb546b35 YW |
742 | size_t devpath_len; |
743 | int r, ifindex = 0; | |
744 | bool is_block; | |
745 | ||
746 | r = sd_device_get_subsystem(event->dev, &subsystem); | |
747 | if (r < 0) | |
748 | return r; | |
749 | ||
750 | is_block = streq(subsystem, "block"); | |
751 | ||
752 | r = sd_device_get_devpath(event->dev, &devpath); | |
753 | if (r < 0) | |
754 | return r; | |
755 | ||
756 | devpath_len = strlen(devpath); | |
757 | ||
758 | r = sd_device_get_property_value(event->dev, "DEVPATH_OLD", &devpath_old); | |
759 | if (r < 0 && r != -ENOENT) | |
760 | return r; | |
761 | ||
762 | r = sd_device_get_devnum(event->dev, &devnum); | |
763 | if (r < 0 && r != -ENOENT) | |
764 | return r; | |
765 | ||
766 | r = sd_device_get_ifindex(event->dev, &ifindex); | |
767 | if (r < 0 && r != -ENOENT) | |
768 | return r; | |
912541b0 KS |
769 | |
770 | /* check if queue contains events we depend on */ | |
40a57716 | 771 | LIST_FOREACH(event, loop_event, manager->events) { |
eb546b35 YW |
772 | size_t loop_devpath_len, common; |
773 | const char *loop_devpath; | |
774 | ||
87ac8d99 | 775 | /* we already found a later event, earlier cannot block us, no need to check again */ |
912541b0 KS |
776 | if (loop_event->seqnum < event->delaying_seqnum) |
777 | continue; | |
778 | ||
779 | /* event we checked earlier still exists, no need to check again */ | |
780 | if (loop_event->seqnum == event->delaying_seqnum) | |
781 | return true; | |
782 | ||
783 | /* found ourself, no later event can block us */ | |
784 | if (loop_event->seqnum >= event->seqnum) | |
785 | break; | |
786 | ||
787 | /* check major/minor */ | |
eb546b35 YW |
788 | if (major(devnum) != 0) { |
789 | const char *s; | |
790 | dev_t d; | |
791 | ||
792 | if (sd_device_get_subsystem(loop_event->dev, &s) < 0) | |
793 | continue; | |
794 | ||
795 | if (sd_device_get_devnum(loop_event->dev, &d) >= 0 && | |
796 | devnum == d && is_block == streq(s, "block")) | |
86714116 | 797 | goto set_delaying_seqnum; |
eb546b35 | 798 | } |
912541b0 KS |
799 | |
800 | /* check network device ifindex */ | |
eb546b35 YW |
801 | if (ifindex > 0) { |
802 | int i; | |
803 | ||
804 | if (sd_device_get_ifindex(loop_event->dev, &i) >= 0 && | |
805 | ifindex == i) | |
86714116 | 806 | goto set_delaying_seqnum; |
eb546b35 YW |
807 | } |
808 | ||
809 | if (sd_device_get_devpath(loop_event->dev, &loop_devpath) < 0) | |
810 | continue; | |
912541b0 KS |
811 | |
812 | /* check our old name */ | |
0bd0407e YW |
813 | if (devpath_old && streq(devpath_old, loop_devpath)) |
814 | goto set_delaying_seqnum; | |
912541b0 | 815 | |
eb546b35 YW |
816 | loop_devpath_len = strlen(loop_devpath); |
817 | ||
912541b0 | 818 | /* compare devpath */ |
eb546b35 | 819 | common = MIN(devpath_len, loop_devpath_len); |
912541b0 KS |
820 | |
821 | /* one devpath is contained in the other? */ | |
eb546b35 | 822 | if (!strneq(devpath, loop_devpath, common)) |
912541b0 KS |
823 | continue; |
824 | ||
825 | /* identical device event found */ | |
baa461fc | 826 | if (devpath_len == loop_devpath_len) |
0bd0407e | 827 | goto set_delaying_seqnum; |
912541b0 KS |
828 | |
829 | /* parent device event found */ | |
0bd0407e YW |
830 | if (devpath[common] == '/') |
831 | goto set_delaying_seqnum; | |
912541b0 KS |
832 | |
833 | /* child device event found */ | |
0bd0407e YW |
834 | if (loop_devpath[common] == '/') |
835 | goto set_delaying_seqnum; | |
912541b0 KS |
836 | } |
837 | ||
838 | return false; | |
0bd0407e YW |
839 | |
840 | set_delaying_seqnum: | |
7600dbb8 UKK |
841 | log_device_debug(event->dev, "SEQNUM=%" PRIu64 " blocked by SEQNUM=%" PRIu64, |
842 | event->seqnum, loop_event->seqnum); | |
843 | ||
0bd0407e YW |
844 | event->delaying_seqnum = loop_event->seqnum; |
845 | return true; | |
7fafc032 KS |
846 | } |
847 | ||
62d43dac | 848 | static void manager_exit(Manager *manager) { |
62d43dac TG |
849 | assert(manager); |
850 | ||
851 | manager->exit = true; | |
852 | ||
b79aacbf TG |
853 | sd_notify(false, |
854 | "STOPPING=1\n" | |
855 | "STATUS=Starting shutdown..."); | |
856 | ||
62d43dac | 857 | /* close sources of new events and discard buffered events */ |
ab7854df | 858 | manager->ctrl = udev_ctrl_unref(manager->ctrl); |
62d43dac | 859 | |
693d371d | 860 | manager->inotify_event = sd_event_source_unref(manager->inotify_event); |
ab7854df | 861 | manager->fd_inotify = safe_close(manager->fd_inotify); |
62d43dac | 862 | |
3cabdc23 MW |
863 | manager->monitor = sd_device_monitor_unref(manager->monitor); |
864 | ||
62d43dac TG |
865 | /* discard queued events and kill workers */ |
866 | event_queue_cleanup(manager, EVENT_QUEUED); | |
867 | manager_kill_workers(manager); | |
868 | } | |
869 | ||
870 | /* reload requested, HUP signal received, rules changed, builtin changed */ | |
871 | static void manager_reload(Manager *manager) { | |
872 | ||
873 | assert(manager); | |
874 | ||
b79aacbf TG |
875 | sd_notify(false, |
876 | "RELOADING=1\n" | |
877 | "STATUS=Flushing configuration..."); | |
878 | ||
62d43dac | 879 | manager_kill_workers(manager); |
981fae90 | 880 | manager->rules = udev_rules_free(manager->rules); |
2024ed61 | 881 | udev_builtin_exit(); |
b79aacbf | 882 | |
1ef72b55 MS |
883 | sd_notifyf(false, |
884 | "READY=1\n" | |
885 | "STATUS=Processing with %u children at max", arg_children_max); | |
62d43dac TG |
886 | } |
887 | ||
eca195ec YW |
888 | static int on_kill_workers_event(sd_event_source *s, uint64_t usec, void *userdata) { |
889 | Manager *manager = userdata; | |
890 | ||
891 | assert(manager); | |
892 | ||
893 | log_debug("Cleanup idle workers"); | |
894 | manager_kill_workers(manager); | |
895 | ||
896 | return 1; | |
897 | } | |
898 | ||
c0c6806b | 899 | static void event_queue_start(Manager *manager) { |
40a57716 | 900 | struct event *event; |
693d371d | 901 | usec_t usec; |
0725c4b9 | 902 | int r; |
8ab44e3f | 903 | |
c0c6806b TG |
904 | assert(manager); |
905 | ||
40a57716 | 906 | if (LIST_IS_EMPTY(manager->events) || |
7c4c7e89 TG |
907 | manager->exit || manager->stop_exec_queue) |
908 | return; | |
909 | ||
3285baa8 | 910 | assert_se(sd_event_now(manager->event, CLOCK_MONOTONIC, &usec) >= 0); |
38a03f06 LP |
911 | /* check for changed config, every 3 seconds at most */ |
912 | if (manager->last_usec == 0 || | |
33ad742a | 913 | usec - manager->last_usec > 3 * USEC_PER_SEC) { |
38a03f06 | 914 | if (udev_rules_check_timestamp(manager->rules) || |
2024ed61 | 915 | udev_builtin_validate()) |
38a03f06 | 916 | manager_reload(manager); |
693d371d | 917 | |
38a03f06 | 918 | manager->last_usec = usec; |
7c4c7e89 TG |
919 | } |
920 | ||
0725c4b9 YW |
921 | r = event_source_disable(manager->kill_workers_event); |
922 | if (r < 0) | |
923 | log_warning_errno(r, "Failed to disable event source for cleaning up idle workers, ignoring: %m"); | |
eca195ec | 924 | |
2024ed61 | 925 | udev_builtin_init(); |
7c4c7e89 TG |
926 | |
927 | if (!manager->rules) { | |
c238a1f5 | 928 | r = udev_rules_load(&manager->rules, arg_resolve_name_timing); |
1d791281 ZJS |
929 | if (r < 0) { |
930 | log_warning_errno(r, "Failed to read udev rules: %m"); | |
7c4c7e89 | 931 | return; |
1d791281 | 932 | } |
7c4c7e89 TG |
933 | } |
934 | ||
eb546b35 | 935 | LIST_FOREACH(event, event, manager->events) { |
912541b0 KS |
936 | if (event->state != EVENT_QUEUED) |
937 | continue; | |
0bc74ea7 | 938 | |
912541b0 | 939 | /* do not start event if parent or child event is still running */ |
eb546b35 | 940 | if (is_device_busy(manager, event) != 0) |
912541b0 | 941 | continue; |
fc465079 | 942 | |
c0c6806b | 943 | event_run(manager, event); |
912541b0 | 944 | } |
1e03b754 KS |
945 | } |
946 | ||
ecb17862 | 947 | static void event_queue_cleanup(Manager *manager, enum event_state match_type) { |
40a57716 | 948 | struct event *event, *tmp; |
ff2c503d | 949 | |
40a57716 | 950 | LIST_FOREACH_SAFE(event, event, tmp, manager->events) { |
912541b0 KS |
951 | if (match_type != EVENT_UNDEF && match_type != event->state) |
952 | continue; | |
ff2c503d | 953 | |
c6aa11f2 | 954 | event_free(event); |
912541b0 | 955 | } |
ff2c503d KS |
956 | } |
957 | ||
e82e8fa5 | 958 | static int on_worker(sd_event_source *s, int fd, uint32_t revents, void *userdata) { |
c0c6806b TG |
959 | Manager *manager = userdata; |
960 | ||
961 | assert(manager); | |
962 | ||
912541b0 KS |
963 | for (;;) { |
964 | struct worker_message msg; | |
979558f3 TG |
965 | struct iovec iovec = { |
966 | .iov_base = &msg, | |
967 | .iov_len = sizeof(msg), | |
968 | }; | |
fb29cdbe | 969 | CMSG_BUFFER_TYPE(CMSG_SPACE(sizeof(struct ucred))) control; |
979558f3 TG |
970 | struct msghdr msghdr = { |
971 | .msg_iov = &iovec, | |
972 | .msg_iovlen = 1, | |
973 | .msg_control = &control, | |
974 | .msg_controllen = sizeof(control), | |
975 | }; | |
912541b0 | 976 | ssize_t size; |
371d72e0 | 977 | struct ucred *ucred; |
a505965d | 978 | struct worker *worker; |
912541b0 | 979 | |
3691bcf3 LP |
980 | size = recvmsg_safe(fd, &msghdr, MSG_DONTWAIT); |
981 | if (size == -EINTR) | |
982 | continue; | |
983 | if (size == -EAGAIN) | |
984 | /* nothing more to read */ | |
985 | break; | |
986 | if (size < 0) | |
987 | return log_error_errno(size, "Failed to receive message: %m"); | |
988 | ||
989 | cmsg_close_all(&msghdr); | |
979558f3 | 990 | |
3691bcf3 | 991 | if (size != sizeof(struct worker_message)) { |
d4e98880 | 992 | log_warning("Ignoring worker message with invalid size %zi bytes", size); |
e82e8fa5 | 993 | continue; |
979558f3 TG |
994 | } |
995 | ||
371d72e0 | 996 | ucred = CMSG_FIND_DATA(&msghdr, SOL_SOCKET, SCM_CREDENTIALS, struct ucred); |
979558f3 | 997 | if (!ucred || ucred->pid <= 0) { |
d4e98880 | 998 | log_warning("Ignoring worker message without valid PID"); |
979558f3 TG |
999 | continue; |
1000 | } | |
912541b0 KS |
1001 | |
1002 | /* lookup worker who sent the signal */ | |
4a0b58c4 | 1003 | worker = hashmap_get(manager->workers, PID_TO_PTR(ucred->pid)); |
a505965d | 1004 | if (!worker) { |
044497e2 | 1005 | log_debug("Worker ["PID_FMT"] returned, but is no longer tracked", ucred->pid); |
a505965d | 1006 | continue; |
912541b0 | 1007 | } |
c0bbfd72 | 1008 | |
a505965d TG |
1009 | if (worker->state != WORKER_KILLED) |
1010 | worker->state = WORKER_IDLE; | |
1011 | ||
1012 | /* worker returned */ | |
1013 | event_free(worker->event); | |
912541b0 | 1014 | } |
e82e8fa5 | 1015 | |
8302fe5a TG |
1016 | /* we have free workers, try to schedule events */ |
1017 | event_queue_start(manager); | |
1018 | ||
e82e8fa5 TG |
1019 | return 1; |
1020 | } | |
1021 | ||
f00d2b6d | 1022 | static int on_uevent(sd_device_monitor *monitor, sd_device *dev, void *userdata) { |
c0c6806b | 1023 | Manager *manager = userdata; |
e82e8fa5 TG |
1024 | int r; |
1025 | ||
c0c6806b | 1026 | assert(manager); |
e82e8fa5 | 1027 | |
7f2e3a14 YW |
1028 | device_ensure_usec_initialized(dev, NULL); |
1029 | ||
eb546b35 YW |
1030 | r = event_queue_insert(manager, dev); |
1031 | if (r < 0) { | |
1032 | log_device_error_errno(dev, r, "Failed to insert device into event queue: %m"); | |
7f2e3a14 | 1033 | return 1; |
eb546b35 | 1034 | } |
7f2e3a14 YW |
1035 | |
1036 | /* we have fresh events, try to schedule them */ | |
1037 | event_queue_start(manager); | |
e82e8fa5 TG |
1038 | |
1039 | return 1; | |
88f4b648 KS |
1040 | } |
1041 | ||
3b47c739 | 1042 | /* receive the udevd message from userspace */ |
d02c6f54 | 1043 | 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 | 1044 | Manager *manager = userdata; |
d02c6f54 | 1045 | int r; |
912541b0 | 1046 | |
d02c6f54 | 1047 | assert(value); |
c0c6806b | 1048 | assert(manager); |
e4f66b77 | 1049 | |
d02c6f54 YW |
1050 | switch (type) { |
1051 | case UDEV_CTRL_SET_LOG_LEVEL: | |
1052 | log_debug("Received udev control message (SET_LOG_LEVEL), setting log_priority=%i", value->intval); | |
1053 | log_set_max_level_realm(LOG_REALM_UDEV, value->intval); | |
1054 | log_set_max_level_realm(LOG_REALM_SYSTEMD, value->intval); | |
c0c6806b | 1055 | manager_kill_workers(manager); |
d02c6f54 YW |
1056 | break; |
1057 | case UDEV_CTRL_STOP_EXEC_QUEUE: | |
044497e2 | 1058 | log_debug("Received udev control message (STOP_EXEC_QUEUE)"); |
c0c6806b | 1059 | manager->stop_exec_queue = true; |
d02c6f54 YW |
1060 | break; |
1061 | case UDEV_CTRL_START_EXEC_QUEUE: | |
044497e2 | 1062 | log_debug("Received udev control message (START_EXEC_QUEUE)"); |
c0c6806b | 1063 | manager->stop_exec_queue = false; |
8302fe5a | 1064 | event_queue_start(manager); |
d02c6f54 YW |
1065 | break; |
1066 | case UDEV_CTRL_RELOAD: | |
044497e2 | 1067 | log_debug("Received udev control message (RELOAD)"); |
62d43dac | 1068 | manager_reload(manager); |
d02c6f54 YW |
1069 | break; |
1070 | case UDEV_CTRL_SET_ENV: { | |
9b5150b6 | 1071 | _cleanup_free_ char *key = NULL, *val = NULL, *old_key = NULL, *old_val = NULL; |
d02c6f54 | 1072 | const char *eq; |
9b5150b6 | 1073 | |
d02c6f54 | 1074 | eq = strchr(value->buf, '='); |
9b5150b6 | 1075 | if (!eq) { |
d02c6f54 | 1076 | log_error("Invalid key format '%s'", value->buf); |
9b5150b6 YW |
1077 | return 1; |
1078 | } | |
1079 | ||
d02c6f54 | 1080 | key = strndup(value->buf, eq - value->buf); |
9b5150b6 YW |
1081 | if (!key) { |
1082 | log_oom(); | |
1083 | return 1; | |
1084 | } | |
1085 | ||
1086 | old_val = hashmap_remove2(manager->properties, key, (void **) &old_key); | |
1087 | ||
1088 | r = hashmap_ensure_allocated(&manager->properties, &string_hash_ops); | |
1089 | if (r < 0) { | |
1090 | log_oom(); | |
1091 | return 1; | |
912541b0 | 1092 | } |
9b5150b6 YW |
1093 | |
1094 | eq++; | |
f053fc33 | 1095 | if (isempty(eq)) { |
044497e2 | 1096 | log_debug("Received udev control message (ENV), unsetting '%s'", key); |
9b5150b6 YW |
1097 | |
1098 | r = hashmap_put(manager->properties, key, NULL); | |
1099 | if (r < 0) { | |
1100 | log_oom(); | |
1101 | return 1; | |
1102 | } | |
1103 | } else { | |
1104 | val = strdup(eq); | |
1105 | if (!val) { | |
1106 | log_oom(); | |
1107 | return 1; | |
1108 | } | |
1109 | ||
044497e2 | 1110 | log_debug("Received udev control message (ENV), setting '%s=%s'", key, val); |
9b5150b6 YW |
1111 | |
1112 | r = hashmap_put(manager->properties, key, val); | |
1113 | if (r < 0) { | |
1114 | log_oom(); | |
1115 | return 1; | |
1116 | } | |
1117 | } | |
1118 | ||
1119 | key = val = NULL; | |
c0c6806b | 1120 | manager_kill_workers(manager); |
d02c6f54 | 1121 | break; |
912541b0 | 1122 | } |
d02c6f54 YW |
1123 | case UDEV_CTRL_SET_CHILDREN_MAX: |
1124 | if (value->intval <= 0) { | |
1125 | log_debug("Received invalid udev control message (SET_MAX_CHILDREN, %i), ignoring.", value->intval); | |
1126 | return 0; | |
1127 | } | |
912541b0 | 1128 | |
d02c6f54 YW |
1129 | log_debug("Received udev control message (SET_MAX_CHILDREN), setting children_max=%i", value->intval); |
1130 | arg_children_max = value->intval; | |
1ef72b55 MS |
1131 | |
1132 | (void) sd_notifyf(false, | |
1133 | "READY=1\n" | |
1134 | "STATUS=Processing with %u children at max", arg_children_max); | |
d02c6f54 YW |
1135 | break; |
1136 | case UDEV_CTRL_PING: | |
d30f43ee | 1137 | log_debug("Received udev control message (PING)"); |
d02c6f54 YW |
1138 | break; |
1139 | case UDEV_CTRL_EXIT: | |
044497e2 | 1140 | log_debug("Received udev control message (EXIT)"); |
62d43dac | 1141 | manager_exit(manager); |
d02c6f54 YW |
1142 | break; |
1143 | default: | |
1144 | log_debug("Received unknown udev control message, ignoring"); | |
912541b0 | 1145 | } |
e4f66b77 | 1146 | |
e82e8fa5 | 1147 | return 1; |
88f4b648 | 1148 | } |
4a231017 | 1149 | |
0584b17a ZJS |
1150 | static int synthesize_change_one(sd_device *dev, const char *syspath) { |
1151 | const char *filename; | |
1152 | int r; | |
1153 | ||
1154 | filename = strjoina(syspath, "/uevent"); | |
1155 | log_device_debug(dev, "device is closed, synthesising 'change' on %s", syspath); | |
1156 | r = write_string_file(filename, "change", WRITE_STRING_FILE_DISABLE_BUFFER); | |
1157 | if (r < 0) | |
1158 | return log_device_debug_errno(dev, r, "Failed to write 'change' to %s: %m", filename); | |
1159 | return 0; | |
1160 | } | |
1161 | ||
70068602 YW |
1162 | static int synthesize_change(sd_device *dev) { |
1163 | const char *subsystem, *sysname, *devname, *syspath, *devtype; | |
f3a740a5 | 1164 | int r; |
edd32000 | 1165 | |
70068602 YW |
1166 | r = sd_device_get_subsystem(dev, &subsystem); |
1167 | if (r < 0) | |
1168 | return r; | |
1169 | ||
1170 | r = sd_device_get_sysname(dev, &sysname); | |
1171 | if (r < 0) | |
1172 | return r; | |
1173 | ||
1174 | r = sd_device_get_devname(dev, &devname); | |
1175 | if (r < 0) | |
1176 | return r; | |
1177 | ||
1178 | r = sd_device_get_syspath(dev, &syspath); | |
1179 | if (r < 0) | |
1180 | return r; | |
1181 | ||
1182 | r = sd_device_get_devtype(dev, &devtype); | |
1183 | if (r < 0) | |
1184 | return r; | |
1185 | ||
1186 | if (streq_ptr("block", subsystem) && | |
1187 | streq_ptr("disk", devtype) && | |
1188 | !startswith(sysname, "dm-")) { | |
1189 | _cleanup_(sd_device_enumerator_unrefp) sd_device_enumerator *e = NULL; | |
1190 | bool part_table_read = false, has_partitions = false; | |
1191 | sd_device *d; | |
ede34445 | 1192 | int fd; |
f3a740a5 | 1193 | |
ede34445 | 1194 | /* |
e9fc29f4 KS |
1195 | * Try to re-read the partition table. This only succeeds if |
1196 | * none of the devices is busy. The kernel returns 0 if no | |
1197 | * partition table is found, and we will not get an event for | |
1198 | * the disk. | |
ede34445 | 1199 | */ |
70068602 | 1200 | fd = open(devname, O_RDONLY|O_CLOEXEC|O_NOFOLLOW|O_NONBLOCK); |
ede34445 | 1201 | if (fd >= 0) { |
02ba8fb3 KS |
1202 | r = flock(fd, LOCK_EX|LOCK_NB); |
1203 | if (r >= 0) | |
1204 | r = ioctl(fd, BLKRRPART, 0); | |
1205 | ||
ede34445 KS |
1206 | close(fd); |
1207 | if (r >= 0) | |
e9fc29f4 | 1208 | part_table_read = true; |
ede34445 KS |
1209 | } |
1210 | ||
e9fc29f4 | 1211 | /* search for partitions */ |
70068602 | 1212 | r = sd_device_enumerator_new(&e); |
f3a740a5 KS |
1213 | if (r < 0) |
1214 | return r; | |
1215 | ||
70068602 | 1216 | r = sd_device_enumerator_allow_uninitialized(e); |
f3a740a5 KS |
1217 | if (r < 0) |
1218 | return r; | |
1219 | ||
70068602 | 1220 | r = sd_device_enumerator_add_match_parent(e, dev); |
47a3fa0f TA |
1221 | if (r < 0) |
1222 | return r; | |
e9fc29f4 | 1223 | |
70068602 YW |
1224 | r = sd_device_enumerator_add_match_subsystem(e, "block", true); |
1225 | if (r < 0) | |
1226 | return r; | |
e9fc29f4 | 1227 | |
70068602 YW |
1228 | FOREACH_DEVICE(e, d) { |
1229 | const char *t; | |
e9fc29f4 | 1230 | |
70068602 YW |
1231 | if (sd_device_get_devtype(d, &t) < 0 || |
1232 | !streq("partition", t)) | |
e9fc29f4 KS |
1233 | continue; |
1234 | ||
1235 | has_partitions = true; | |
1236 | break; | |
1237 | } | |
1238 | ||
1239 | /* | |
1240 | * We have partitions and re-read the table, the kernel already sent | |
1241 | * out a "change" event for the disk, and "remove/add" for all | |
1242 | * partitions. | |
1243 | */ | |
1244 | if (part_table_read && has_partitions) | |
1245 | return 0; | |
1246 | ||
1247 | /* | |
1248 | * We have partitions but re-reading the partition table did not | |
1249 | * work, synthesize "change" for the disk and all partitions. | |
1250 | */ | |
0584b17a | 1251 | (void) synthesize_change_one(dev, syspath); |
e9fc29f4 | 1252 | |
70068602 YW |
1253 | FOREACH_DEVICE(e, d) { |
1254 | const char *t, *n, *s; | |
f3a740a5 | 1255 | |
70068602 YW |
1256 | if (sd_device_get_devtype(d, &t) < 0 || |
1257 | !streq("partition", t)) | |
f3a740a5 KS |
1258 | continue; |
1259 | ||
70068602 YW |
1260 | if (sd_device_get_devname(d, &n) < 0 || |
1261 | sd_device_get_syspath(d, &s) < 0) | |
f3a740a5 KS |
1262 | continue; |
1263 | ||
0584b17a | 1264 | (void) synthesize_change_one(dev, s); |
f3a740a5 | 1265 | } |
ede34445 | 1266 | |
0584b17a ZJS |
1267 | } else |
1268 | (void) synthesize_change_one(dev, syspath); | |
ede34445 | 1269 | |
f3a740a5 | 1270 | return 0; |
edd32000 KS |
1271 | } |
1272 | ||
e82e8fa5 | 1273 | static int on_inotify(sd_event_source *s, int fd, uint32_t revents, void *userdata) { |
c0c6806b | 1274 | Manager *manager = userdata; |
0254e944 | 1275 | union inotify_event_buffer buffer; |
f7c1ad4f LP |
1276 | struct inotify_event *e; |
1277 | ssize_t l; | |
0725c4b9 | 1278 | int r; |
912541b0 | 1279 | |
c0c6806b | 1280 | assert(manager); |
e82e8fa5 | 1281 | |
0725c4b9 YW |
1282 | r = event_source_disable(manager->kill_workers_event); |
1283 | if (r < 0) | |
1284 | log_warning_errno(r, "Failed to disable event source for cleaning up idle workers, ignoring: %m"); | |
eca195ec | 1285 | |
e82e8fa5 | 1286 | l = read(fd, &buffer, sizeof(buffer)); |
f7c1ad4f | 1287 | if (l < 0) { |
3742095b | 1288 | if (IN_SET(errno, EAGAIN, EINTR)) |
e82e8fa5 | 1289 | return 1; |
912541b0 | 1290 | |
f7c1ad4f | 1291 | return log_error_errno(errno, "Failed to read inotify fd: %m"); |
912541b0 KS |
1292 | } |
1293 | ||
f7c1ad4f | 1294 | FOREACH_INOTIFY_EVENT(e, buffer, l) { |
70068602 YW |
1295 | _cleanup_(sd_device_unrefp) sd_device *dev = NULL; |
1296 | const char *devnode; | |
1297 | ||
7fe3324c | 1298 | if (udev_watch_lookup(e->wd, &dev) <= 0) |
70068602 | 1299 | continue; |
912541b0 | 1300 | |
70068602 | 1301 | if (sd_device_get_devname(dev, &devnode) < 0) |
edd32000 | 1302 | continue; |
912541b0 | 1303 | |
7fe3324c | 1304 | log_device_debug(dev, "Inotify event: %x for %s", e->mask, devnode); |
da143134 | 1305 | if (e->mask & IN_CLOSE_WRITE) |
edd32000 | 1306 | synthesize_change(dev); |
da143134 | 1307 | else if (e->mask & IN_IGNORED) |
2024ed61 | 1308 | udev_watch_end(dev); |
912541b0 KS |
1309 | } |
1310 | ||
e82e8fa5 | 1311 | return 1; |
bd284db1 SJR |
1312 | } |
1313 | ||
0561329d | 1314 | static int on_sigterm(sd_event_source *s, const struct signalfd_siginfo *si, void *userdata) { |
c0c6806b TG |
1315 | Manager *manager = userdata; |
1316 | ||
1317 | assert(manager); | |
1318 | ||
62d43dac | 1319 | manager_exit(manager); |
912541b0 | 1320 | |
e82e8fa5 TG |
1321 | return 1; |
1322 | } | |
912541b0 | 1323 | |
0561329d | 1324 | static int on_sighup(sd_event_source *s, const struct signalfd_siginfo *si, void *userdata) { |
c0c6806b TG |
1325 | Manager *manager = userdata; |
1326 | ||
1327 | assert(manager); | |
1328 | ||
62d43dac | 1329 | manager_reload(manager); |
912541b0 | 1330 | |
e82e8fa5 TG |
1331 | return 1; |
1332 | } | |
912541b0 | 1333 | |
e82e8fa5 | 1334 | static int on_sigchld(sd_event_source *s, const struct signalfd_siginfo *si, void *userdata) { |
c0c6806b | 1335 | Manager *manager = userdata; |
0725c4b9 | 1336 | int r; |
c0c6806b TG |
1337 | |
1338 | assert(manager); | |
1339 | ||
e82e8fa5 TG |
1340 | for (;;) { |
1341 | pid_t pid; | |
1342 | int status; | |
1343 | struct worker *worker; | |
d1317d02 | 1344 | |
e82e8fa5 TG |
1345 | pid = waitpid(-1, &status, WNOHANG); |
1346 | if (pid <= 0) | |
f29328d6 | 1347 | break; |
e82e8fa5 | 1348 | |
4a0b58c4 | 1349 | worker = hashmap_get(manager->workers, PID_TO_PTR(pid)); |
e82e8fa5 | 1350 | if (!worker) { |
dc7faf2a | 1351 | log_warning("Worker ["PID_FMT"] is unknown, ignoring", pid); |
f29328d6 | 1352 | continue; |
912541b0 | 1353 | } |
e82e8fa5 TG |
1354 | |
1355 | if (WIFEXITED(status)) { | |
1356 | if (WEXITSTATUS(status) == 0) | |
dc7faf2a | 1357 | log_debug("Worker ["PID_FMT"] exited", pid); |
e82e8fa5 | 1358 | else |
dc7faf2a | 1359 | log_warning("Worker ["PID_FMT"] exited with return code %i", pid, WEXITSTATUS(status)); |
33ad742a | 1360 | } else if (WIFSIGNALED(status)) |
dc7faf2a | 1361 | log_warning("Worker ["PID_FMT"] terminated by signal %i (%s)", pid, WTERMSIG(status), signal_to_string(WTERMSIG(status))); |
33ad742a | 1362 | else if (WIFSTOPPED(status)) { |
dc7faf2a | 1363 | log_info("Worker ["PID_FMT"] stopped", pid); |
f29328d6 | 1364 | continue; |
e82e8fa5 | 1365 | } else if (WIFCONTINUED(status)) { |
dc7faf2a | 1366 | log_info("Worker ["PID_FMT"] continued", pid); |
f29328d6 | 1367 | continue; |
e82e8fa5 | 1368 | } else |
dc7faf2a | 1369 | log_warning("Worker ["PID_FMT"] exit with status 0x%04x", pid, status); |
e82e8fa5 | 1370 | |
05e6d9c6 | 1371 | if ((!WIFEXITED(status) || WEXITSTATUS(status) != 0) && worker->event) { |
eb546b35 | 1372 | log_device_error(worker->event->dev, "Worker ["PID_FMT"] failed", pid); |
dc7faf2a | 1373 | |
05e6d9c6 | 1374 | /* delete state from disk */ |
eb546b35 YW |
1375 | device_delete_db(worker->event->dev); |
1376 | device_tag_index(worker->event->dev, NULL, false); | |
dc7faf2a | 1377 | |
030f4571 MW |
1378 | if (manager->monitor) { |
1379 | /* forward kernel event without amending it */ | |
1380 | r = device_monitor_send_device(manager->monitor, NULL, worker->event->dev_kernel); | |
1381 | if (r < 0) | |
1382 | log_device_error_errno(worker->event->dev_kernel, r, "Failed to send back device to kernel: %m"); | |
1383 | } | |
e82e8fa5 TG |
1384 | } |
1385 | ||
1386 | worker_free(worker); | |
912541b0 | 1387 | } |
e82e8fa5 | 1388 | |
8302fe5a TG |
1389 | /* we can start new workers, try to schedule events */ |
1390 | event_queue_start(manager); | |
1391 | ||
eca195ec | 1392 | /* Disable unnecessary cleanup event */ |
0725c4b9 YW |
1393 | if (hashmap_isempty(manager->workers)) { |
1394 | r = event_source_disable(manager->kill_workers_event); | |
1395 | if (r < 0) | |
1396 | log_warning_errno(r, "Failed to disable event source for cleaning up idle workers, ignoring: %m"); | |
1397 | } | |
eca195ec | 1398 | |
e82e8fa5 | 1399 | return 1; |
f27125f9 | 1400 | } |
1401 | ||
693d371d TG |
1402 | static int on_post(sd_event_source *s, void *userdata) { |
1403 | Manager *manager = userdata; | |
693d371d TG |
1404 | |
1405 | assert(manager); | |
1406 | ||
b6107f01 YW |
1407 | if (!LIST_IS_EMPTY(manager->events)) |
1408 | return 1; | |
1409 | ||
1410 | /* There are no pending events. Let's cleanup idle process. */ | |
1411 | ||
1412 | if (!hashmap_isempty(manager->workers)) { | |
1413 | /* There are idle workers */ | |
6d63048a YW |
1414 | (void) event_reset_time(manager->event, &manager->kill_workers_event, CLOCK_MONOTONIC, |
1415 | now(CLOCK_MONOTONIC) + 3 * USEC_PER_SEC, USEC_PER_SEC, | |
1416 | on_kill_workers_event, manager, 0, "kill-workers-event", false); | |
b6107f01 | 1417 | return 1; |
693d371d TG |
1418 | } |
1419 | ||
b6107f01 YW |
1420 | /* There are no idle workers. */ |
1421 | ||
1422 | if (manager->exit) | |
1423 | return sd_event_exit(manager->event, 0); | |
1424 | ||
1425 | if (manager->cgroup) | |
1426 | /* cleanup possible left-over processes in our cgroup */ | |
1427 | (void) cg_kill(SYSTEMD_CGROUP_CONTROLLER, manager->cgroup, SIGKILL, CGROUP_IGNORE_SELF, NULL, NULL, NULL); | |
1428 | ||
693d371d TG |
1429 | return 1; |
1430 | } | |
1431 | ||
c4b69e99 | 1432 | static int listen_fds(int *ret_ctrl, int *ret_netlink) { |
fcff1e72 | 1433 | int ctrl_fd = -1, netlink_fd = -1; |
c4b69e99 | 1434 | int fd, n; |
912541b0 | 1435 | |
c4b69e99 YW |
1436 | assert(ret_ctrl); |
1437 | assert(ret_netlink); | |
fcff1e72 | 1438 | |
912541b0 | 1439 | n = sd_listen_fds(true); |
fcff1e72 TG |
1440 | if (n < 0) |
1441 | return n; | |
912541b0 KS |
1442 | |
1443 | for (fd = SD_LISTEN_FDS_START; fd < n + SD_LISTEN_FDS_START; fd++) { | |
c52cff07 | 1444 | if (sd_is_socket(fd, AF_LOCAL, SOCK_SEQPACKET, -1) > 0) { |
fcff1e72 TG |
1445 | if (ctrl_fd >= 0) |
1446 | return -EINVAL; | |
1447 | ctrl_fd = fd; | |
912541b0 KS |
1448 | continue; |
1449 | } | |
1450 | ||
c52cff07 | 1451 | if (sd_is_socket(fd, AF_NETLINK, SOCK_RAW, -1) > 0) { |
fcff1e72 TG |
1452 | if (netlink_fd >= 0) |
1453 | return -EINVAL; | |
1454 | netlink_fd = fd; | |
912541b0 KS |
1455 | continue; |
1456 | } | |
1457 | ||
fcff1e72 | 1458 | return -EINVAL; |
912541b0 KS |
1459 | } |
1460 | ||
c4b69e99 YW |
1461 | *ret_ctrl = ctrl_fd; |
1462 | *ret_netlink = netlink_fd; | |
912541b0 | 1463 | |
912541b0 | 1464 | return 0; |
7459bcdc KS |
1465 | } |
1466 | ||
e6f86cac | 1467 | /* |
3f85ef0f | 1468 | * read the kernel command line, in case we need to get into debug mode |
1d84ad94 LP |
1469 | * udev.log_priority=<level> syslog priority |
1470 | * udev.children_max=<number of workers> events are fully serialized if set to 1 | |
1471 | * udev.exec_delay=<number of seconds> delay execution of every executed program | |
1472 | * udev.event_timeout=<number of seconds> seconds to wait before terminating an event | |
95ac5230 | 1473 | * udev.blockdev_read_only<=bool> mark all block devices read-only when they appear |
e6f86cac | 1474 | */ |
96287a49 | 1475 | static int parse_proc_cmdline_item(const char *key, const char *value, void *data) { |
95ac5230 | 1476 | int r; |
e6f86cac | 1477 | |
614a823c | 1478 | assert(key); |
e6f86cac | 1479 | |
1d84ad94 LP |
1480 | if (proc_cmdline_key_streq(key, "udev.log_priority")) { |
1481 | ||
1482 | if (proc_cmdline_value_missing(key, value)) | |
1483 | return 0; | |
1484 | ||
46f0fbd8 | 1485 | r = log_level_from_string(value); |
92e72467 ZJS |
1486 | if (r >= 0) |
1487 | log_set_max_level(r); | |
1d84ad94 LP |
1488 | |
1489 | } else if (proc_cmdline_key_streq(key, "udev.event_timeout")) { | |
1490 | ||
1491 | if (proc_cmdline_value_missing(key, value)) | |
1492 | return 0; | |
1493 | ||
9d9264ba | 1494 | r = parse_sec(value, &arg_event_timeout_usec); |
1d84ad94 LP |
1495 | |
1496 | } else if (proc_cmdline_key_streq(key, "udev.children_max")) { | |
1497 | ||
1498 | if (proc_cmdline_value_missing(key, value)) | |
1499 | return 0; | |
1500 | ||
020328e1 | 1501 | r = safe_atou(value, &arg_children_max); |
1d84ad94 LP |
1502 | |
1503 | } else if (proc_cmdline_key_streq(key, "udev.exec_delay")) { | |
1504 | ||
1505 | if (proc_cmdline_value_missing(key, value)) | |
1506 | return 0; | |
1507 | ||
6b92f429 | 1508 | r = parse_sec(value, &arg_exec_delay_usec); |
1d84ad94 | 1509 | |
e2099267 | 1510 | } else if (proc_cmdline_key_streq(key, "udev.timeout_signal")) { |
95ac5230 | 1511 | |
e2099267 MS |
1512 | if (proc_cmdline_value_missing(key, value)) |
1513 | return 0; | |
1514 | ||
1515 | r = signal_from_string(value); | |
1516 | if (r > 0) | |
1517 | arg_timeout_signal = r; | |
95ac5230 LP |
1518 | |
1519 | } else if (proc_cmdline_key_streq(key, "udev.blockdev_read_only")) { | |
1520 | ||
1521 | if (!value) | |
1522 | arg_blockdev_read_only = true; | |
1523 | else { | |
1524 | r = parse_boolean(value); | |
1525 | if (r < 0) | |
1526 | log_warning_errno(r, "Failed to parse udev.blockdev-read-only argument, ignoring: %s", value); | |
1527 | else | |
1528 | arg_blockdev_read_only = r; | |
1529 | } | |
1530 | ||
1531 | if (arg_blockdev_read_only) | |
1532 | log_notice("All physical block devices will be marked read-only."); | |
1533 | ||
1534 | return 0; | |
1535 | ||
1536 | } else { | |
1537 | if (startswith(key, "udev.")) | |
1538 | log_warning("Unknown udev kernel command line option \"%s\", ignoring.", key); | |
1539 | ||
1540 | return 0; | |
1541 | } | |
614a823c | 1542 | |
92e72467 ZJS |
1543 | if (r < 0) |
1544 | log_warning_errno(r, "Failed to parse \"%s=%s\", ignoring: %m", key, value); | |
1d84ad94 | 1545 | |
614a823c | 1546 | return 0; |
e6f86cac KS |
1547 | } |
1548 | ||
37ec0fdd LP |
1549 | static int help(void) { |
1550 | _cleanup_free_ char *link = NULL; | |
1551 | int r; | |
1552 | ||
1553 | r = terminal_urlify_man("systemd-udevd.service", "8", &link); | |
1554 | if (r < 0) | |
1555 | return log_oom(); | |
1556 | ||
ed216e1f | 1557 | printf("%s [OPTIONS...]\n\n" |
d1109e12 | 1558 | "Rule-based manager for device events and files.\n\n" |
5ac0162c | 1559 | " -h --help Print this message\n" |
2d19c17e MF |
1560 | " -V --version Print version of the program\n" |
1561 | " -d --daemon Detach and run in the background\n" | |
1562 | " -D --debug Enable debug output\n" | |
1563 | " -c --children-max=INT Set maximum number of workers\n" | |
1564 | " -e --exec-delay=SECONDS Seconds to wait before executing RUN=\n" | |
1565 | " -t --event-timeout=SECONDS Seconds to wait before terminating an event\n" | |
1566 | " -N --resolve-names=early|late|never\n" | |
5ac0162c | 1567 | " When to resolve users and groups\n" |
37ec0fdd LP |
1568 | "\nSee the %s for details.\n" |
1569 | , program_invocation_short_name | |
1570 | , link | |
1571 | ); | |
1572 | ||
1573 | return 0; | |
ed216e1f TG |
1574 | } |
1575 | ||
bba7a484 | 1576 | static int parse_argv(int argc, char *argv[]) { |
e2099267 MS |
1577 | enum { |
1578 | ARG_TIMEOUT_SIGNAL, | |
1579 | }; | |
1580 | ||
912541b0 | 1581 | static const struct option options[] = { |
e2099267 MS |
1582 | { "daemon", no_argument, NULL, 'd' }, |
1583 | { "debug", no_argument, NULL, 'D' }, | |
1584 | { "children-max", required_argument, NULL, 'c' }, | |
1585 | { "exec-delay", required_argument, NULL, 'e' }, | |
1586 | { "event-timeout", required_argument, NULL, 't' }, | |
1587 | { "resolve-names", required_argument, NULL, 'N' }, | |
1588 | { "help", no_argument, NULL, 'h' }, | |
1589 | { "version", no_argument, NULL, 'V' }, | |
1590 | { "timeout-signal", required_argument, NULL, ARG_TIMEOUT_SIGNAL }, | |
912541b0 KS |
1591 | {} |
1592 | }; | |
689a97f5 | 1593 | |
044497e2 | 1594 | int c, r; |
689a97f5 | 1595 | |
bba7a484 TG |
1596 | assert(argc >= 0); |
1597 | assert(argv); | |
912541b0 | 1598 | |
e14b6f21 | 1599 | while ((c = getopt_long(argc, argv, "c:de:Dt:N:hV", options, NULL)) >= 0) { |
bba7a484 | 1600 | switch (c) { |
912541b0 | 1601 | |
912541b0 | 1602 | case 'd': |
bba7a484 | 1603 | arg_daemonize = true; |
912541b0 KS |
1604 | break; |
1605 | case 'c': | |
020328e1 | 1606 | r = safe_atou(optarg, &arg_children_max); |
6f5cf8a8 | 1607 | if (r < 0) |
389f9bf2 | 1608 | log_warning_errno(r, "Failed to parse --children-max= value '%s', ignoring: %m", optarg); |
912541b0 KS |
1609 | break; |
1610 | case 'e': | |
6b92f429 | 1611 | r = parse_sec(optarg, &arg_exec_delay_usec); |
6f5cf8a8 | 1612 | if (r < 0) |
6b92f429 | 1613 | log_warning_errno(r, "Failed to parse --exec-delay= value '%s', ignoring: %m", optarg); |
912541b0 | 1614 | break; |
e2099267 MS |
1615 | case ARG_TIMEOUT_SIGNAL: |
1616 | r = signal_from_string(optarg); | |
1617 | if (r <= 0) | |
1618 | log_warning_errno(r, "Failed to parse --timeout-signal= value '%s', ignoring: %m", optarg); | |
1619 | else | |
1620 | arg_timeout_signal = r; | |
1621 | ||
1622 | break; | |
9719859c | 1623 | case 't': |
9d9264ba | 1624 | r = parse_sec(optarg, &arg_event_timeout_usec); |
f1e8664e | 1625 | if (r < 0) |
9d9264ba | 1626 | log_warning_errno(r, "Failed to parse --event-timeout= value '%s', ignoring: %m", optarg); |
9719859c | 1627 | break; |
912541b0 | 1628 | case 'D': |
bba7a484 | 1629 | arg_debug = true; |
912541b0 | 1630 | break; |
c4d44cba YW |
1631 | case 'N': { |
1632 | ResolveNameTiming t; | |
1633 | ||
1634 | t = resolve_name_timing_from_string(optarg); | |
1635 | if (t < 0) | |
1636 | log_warning("Invalid --resolve-names= value '%s', ignoring.", optarg); | |
1637 | else | |
1638 | arg_resolve_name_timing = t; | |
912541b0 | 1639 | break; |
c4d44cba | 1640 | } |
912541b0 | 1641 | case 'h': |
37ec0fdd | 1642 | return help(); |
912541b0 | 1643 | case 'V': |
681bd2c5 | 1644 | printf("%s\n", GIT_VERSION); |
bba7a484 TG |
1645 | return 0; |
1646 | case '?': | |
1647 | return -EINVAL; | |
912541b0 | 1648 | default: |
bba7a484 TG |
1649 | assert_not_reached("Unhandled option"); |
1650 | ||
912541b0 KS |
1651 | } |
1652 | } | |
1653 | ||
bba7a484 TG |
1654 | return 1; |
1655 | } | |
1656 | ||
b7f74dd4 | 1657 | static int manager_new(Manager **ret, int fd_ctrl, int fd_uevent, const char *cgroup) { |
c0c6806b | 1658 | _cleanup_(manager_freep) Manager *manager = NULL; |
b5af8c8c | 1659 | int r; |
c0c6806b TG |
1660 | |
1661 | assert(ret); | |
1662 | ||
6f19b42f | 1663 | manager = new(Manager, 1); |
c0c6806b TG |
1664 | if (!manager) |
1665 | return log_oom(); | |
1666 | ||
6f19b42f YW |
1667 | *manager = (Manager) { |
1668 | .fd_inotify = -1, | |
1669 | .worker_watch = { -1, -1 }, | |
1670 | .cgroup = cgroup, | |
1671 | }; | |
e237d8cb | 1672 | |
100bc5bf YW |
1673 | r = udev_ctrl_new_from_fd(&manager->ctrl, fd_ctrl); |
1674 | if (r < 0) | |
1675 | return log_error_errno(r, "Failed to initialize udev control socket: %m"); | |
e237d8cb | 1676 | |
b5af8c8c ZJS |
1677 | r = udev_ctrl_enable_receiving(manager->ctrl); |
1678 | if (r < 0) | |
1679 | return log_error_errno(r, "Failed to bind udev control socket: %m"); | |
c4b69e99 | 1680 | |
7f2e3a14 YW |
1681 | r = device_monitor_new_full(&manager->monitor, MONITOR_GROUP_KERNEL, fd_uevent); |
1682 | if (r < 0) | |
1683 | return log_error_errno(r, "Failed to initialize device monitor: %m"); | |
e237d8cb | 1684 | |
1ffadeaa FB |
1685 | /* Bump receiver buffer, but only if we are not called via socket activation, as in that |
1686 | * case systemd sets the receive buffer size for us, and the value in the .socket unit | |
1687 | * should take full effect. */ | |
1688 | if (fd_uevent < 0) | |
1689 | (void) sd_device_monitor_set_receive_buffer_size(manager->monitor, 128 * 1024 * 1024); | |
c4b69e99 | 1690 | |
b5af8c8c ZJS |
1691 | r = device_monitor_enable_receiving(manager->monitor); |
1692 | if (r < 0) | |
1693 | return log_error_errno(r, "Failed to bind netlink socket: %m"); | |
1694 | ||
1695 | *ret = TAKE_PTR(manager); | |
1696 | ||
1697 | return 0; | |
1698 | } | |
1699 | ||
1700 | static int main_loop(Manager *manager) { | |
d02c6f54 | 1701 | int fd_worker, r; |
b5af8c8c | 1702 | |
76e62a4d YW |
1703 | manager->pid = getpid_cached(); |
1704 | ||
e237d8cb TG |
1705 | /* unnamed socket from workers to the main daemon */ |
1706 | r = socketpair(AF_LOCAL, SOCK_DGRAM|SOCK_CLOEXEC, 0, manager->worker_watch); | |
1707 | if (r < 0) | |
044497e2 | 1708 | return log_error_errno(errno, "Failed to create socketpair for communicating with workers: %m"); |
e237d8cb | 1709 | |
693d371d | 1710 | fd_worker = manager->worker_watch[READ_END]; |
e237d8cb | 1711 | |
2ff48e98 | 1712 | r = setsockopt_int(fd_worker, SOL_SOCKET, SO_PASSCRED, true); |
e237d8cb | 1713 | if (r < 0) |
044497e2 | 1714 | return log_error_errno(r, "Failed to enable SO_PASSCRED: %m"); |
e237d8cb | 1715 | |
b7759e04 YW |
1716 | r = udev_watch_init(); |
1717 | if (r < 0) | |
1718 | return log_error_errno(r, "Failed to create inotify descriptor: %m"); | |
1719 | manager->fd_inotify = r; | |
e237d8cb | 1720 | |
2024ed61 | 1721 | udev_watch_restore(); |
e237d8cb TG |
1722 | |
1723 | /* block and listen to all signals on signalfd */ | |
72c0a2c2 | 1724 | assert_se(sigprocmask_many(SIG_BLOCK, NULL, SIGTERM, SIGINT, SIGHUP, SIGCHLD, -1) >= 0); |
693d371d | 1725 | |
49f997f3 TG |
1726 | r = sd_event_default(&manager->event); |
1727 | if (r < 0) | |
044497e2 | 1728 | return log_error_errno(r, "Failed to allocate event loop: %m"); |
49f997f3 | 1729 | |
693d371d TG |
1730 | r = sd_event_add_signal(manager->event, NULL, SIGINT, on_sigterm, manager); |
1731 | if (r < 0) | |
044497e2 | 1732 | return log_error_errno(r, "Failed to create SIGINT event source: %m"); |
693d371d TG |
1733 | |
1734 | r = sd_event_add_signal(manager->event, NULL, SIGTERM, on_sigterm, manager); | |
1735 | if (r < 0) | |
044497e2 | 1736 | return log_error_errno(r, "Failed to create SIGTERM event source: %m"); |
693d371d TG |
1737 | |
1738 | r = sd_event_add_signal(manager->event, NULL, SIGHUP, on_sighup, manager); | |
1739 | if (r < 0) | |
044497e2 | 1740 | return log_error_errno(r, "Failed to create SIGHUP event source: %m"); |
693d371d TG |
1741 | |
1742 | r = sd_event_add_signal(manager->event, NULL, SIGCHLD, on_sigchld, manager); | |
1743 | if (r < 0) | |
044497e2 | 1744 | return log_error_errno(r, "Failed to create SIGCHLD event source: %m"); |
693d371d TG |
1745 | |
1746 | r = sd_event_set_watchdog(manager->event, true); | |
1747 | if (r < 0) | |
044497e2 | 1748 | return log_error_errno(r, "Failed to create watchdog event source: %m"); |
693d371d | 1749 | |
d02c6f54 YW |
1750 | r = udev_ctrl_attach_event(manager->ctrl, manager->event); |
1751 | if (r < 0) | |
1752 | return log_error_errno(r, "Failed to attach event to udev control: %m"); | |
b5af8c8c | 1753 | |
d02c6f54 | 1754 | r = udev_ctrl_start(manager->ctrl, on_ctrl_msg, manager); |
693d371d | 1755 | if (r < 0) |
d02c6f54 | 1756 | return log_error_errno(r, "Failed to start device monitor: %m"); |
693d371d TG |
1757 | |
1758 | /* This needs to be after the inotify and uevent handling, to make sure | |
1759 | * that the ping is send back after fully processing the pending uevents | |
1760 | * (including the synthetic ones we may create due to inotify events). | |
1761 | */ | |
d02c6f54 | 1762 | r = sd_event_source_set_priority(udev_ctrl_get_event_source(manager->ctrl), SD_EVENT_PRIORITY_IDLE); |
693d371d | 1763 | if (r < 0) |
044497e2 | 1764 | return log_error_errno(r, "Failed to set IDLE event priority for udev control event source: %m"); |
693d371d TG |
1765 | |
1766 | r = sd_event_add_io(manager->event, &manager->inotify_event, manager->fd_inotify, EPOLLIN, on_inotify, manager); | |
1767 | if (r < 0) | |
044497e2 | 1768 | return log_error_errno(r, "Failed to create inotify event source: %m"); |
693d371d | 1769 | |
f00d2b6d YW |
1770 | r = sd_device_monitor_attach_event(manager->monitor, manager->event); |
1771 | if (r < 0) | |
1772 | return log_error_errno(r, "Failed to attach event to device monitor: %m"); | |
1773 | ||
1774 | r = sd_device_monitor_start(manager->monitor, on_uevent, manager); | |
693d371d | 1775 | if (r < 0) |
f00d2b6d YW |
1776 | return log_error_errno(r, "Failed to start device monitor: %m"); |
1777 | ||
1778 | (void) sd_event_source_set_description(sd_device_monitor_get_event_source(manager->monitor), "device-monitor"); | |
693d371d TG |
1779 | |
1780 | r = sd_event_add_io(manager->event, NULL, fd_worker, EPOLLIN, on_worker, manager); | |
1781 | if (r < 0) | |
044497e2 | 1782 | return log_error_errno(r, "Failed to create worker event source: %m"); |
693d371d TG |
1783 | |
1784 | r = sd_event_add_post(manager->event, NULL, on_post, manager); | |
1785 | if (r < 0) | |
044497e2 | 1786 | return log_error_errno(r, "Failed to create post event source: %m"); |
e237d8cb | 1787 | |
b5af8c8c | 1788 | udev_builtin_init(); |
077fc5e2 | 1789 | |
c238a1f5 | 1790 | r = udev_rules_load(&manager->rules, arg_resolve_name_timing); |
b5af8c8c ZJS |
1791 | if (!manager->rules) |
1792 | return log_error_errno(r, "Failed to read udev rules: %m"); | |
077fc5e2 DH |
1793 | |
1794 | r = udev_rules_apply_static_dev_perms(manager->rules); | |
1795 | if (r < 0) | |
044497e2 | 1796 | log_error_errno(r, "Failed to apply permissions on static device nodes: %m"); |
077fc5e2 | 1797 | |
1ef72b55 MS |
1798 | (void) sd_notifyf(false, |
1799 | "READY=1\n" | |
1800 | "STATUS=Processing with %u children at max", arg_children_max); | |
077fc5e2 DH |
1801 | |
1802 | r = sd_event_loop(manager->event); | |
44dcf454 | 1803 | if (r < 0) |
044497e2 | 1804 | log_error_errno(r, "Event loop failed: %m"); |
077fc5e2 | 1805 | |
077fc5e2 DH |
1806 | sd_notify(false, |
1807 | "STOPPING=1\n" | |
1808 | "STATUS=Shutting down..."); | |
077fc5e2 DH |
1809 | return r; |
1810 | } | |
1811 | ||
63e2d171 | 1812 | int run_udevd(int argc, char *argv[]) { |
c26d1879 | 1813 | _cleanup_free_ char *cgroup = NULL; |
b5af8c8c | 1814 | _cleanup_(manager_freep) Manager *manager = NULL; |
efa1606e | 1815 | int fd_ctrl = -1, fd_uevent = -1; |
e5d7bce1 | 1816 | int r; |
bba7a484 | 1817 | |
bba7a484 | 1818 | log_set_target(LOG_TARGET_AUTO); |
6b413782 | 1819 | log_open(); |
e2099267 | 1820 | udev_parse_config_full(&arg_children_max, &arg_exec_delay_usec, &arg_event_timeout_usec, &arg_resolve_name_timing, &arg_timeout_signal); |
bba7a484 | 1821 | log_parse_environment(); |
6b413782 | 1822 | log_open(); /* Done again to update after reading configuration. */ |
bba7a484 | 1823 | |
bba7a484 TG |
1824 | r = parse_argv(argc, argv); |
1825 | if (r <= 0) | |
0c5a109a | 1826 | return r; |
bba7a484 | 1827 | |
1d84ad94 | 1828 | r = proc_cmdline_parse(parse_proc_cmdline_item, NULL, PROC_CMDLINE_STRIP_RD_PREFIX); |
614a823c | 1829 | if (r < 0) |
044497e2 | 1830 | log_warning_errno(r, "Failed to parse kernel command line, ignoring: %m"); |
912541b0 | 1831 | |
78d3e041 KS |
1832 | if (arg_debug) { |
1833 | log_set_target(LOG_TARGET_CONSOLE); | |
bba7a484 | 1834 | log_set_max_level(LOG_DEBUG); |
78d3e041 | 1835 | } |
bba7a484 | 1836 | |
6174a243 YW |
1837 | log_set_max_level_realm(LOG_REALM_SYSTEMD, log_get_max_level()); |
1838 | ||
fba868fa LP |
1839 | r = must_be_root(); |
1840 | if (r < 0) | |
0c5a109a | 1841 | return r; |
912541b0 | 1842 | |
712cebf1 | 1843 | if (arg_children_max == 0) { |
fe56acd8 | 1844 | unsigned long cpu_limit, mem_limit, cpu_count = 1; |
d457ff83 | 1845 | |
fe56acd8 LP |
1846 | r = cpus_in_affinity_mask(); |
1847 | if (r < 0) | |
1848 | log_warning_errno(r, "Failed to determine number of local CPUs, ignoring: %m"); | |
1849 | else | |
1850 | cpu_count = r; | |
88bd5a32 FB |
1851 | |
1852 | cpu_limit = cpu_count * 2 + 16; | |
1853 | mem_limit = MAX(physical_memory() / (128UL*1024*1024), 10U); | |
912541b0 | 1854 | |
88bd5a32 FB |
1855 | arg_children_max = MIN(cpu_limit, mem_limit); |
1856 | arg_children_max = MIN(WORKER_NUM_MAX, arg_children_max); | |
e438c57a | 1857 | |
044497e2 | 1858 | log_debug("Set children_max to %u", arg_children_max); |
d457ff83 | 1859 | } |
912541b0 | 1860 | |
712cebf1 | 1861 | /* set umask before creating any file/directory */ |
712cebf1 | 1862 | umask(022); |
912541b0 | 1863 | |
c3dacc8b | 1864 | r = mac_selinux_init(); |
0c5a109a | 1865 | if (r < 0) |
a9ba0e32 | 1866 | return r; |
912541b0 | 1867 | |
dae8b82e | 1868 | r = mkdir_errno_wrapper("/run/udev", 0755); |
0c5a109a ZJS |
1869 | if (r < 0 && r != -EEXIST) |
1870 | return log_error_errno(r, "Failed to create /run/udev: %m"); | |
712cebf1 | 1871 | |
31cbd202 YW |
1872 | if (getppid() == 1 && sd_booted() > 0) { |
1873 | /* Get our own cgroup, we regularly kill everything udev has left behind. | |
1874 | * We only do this on systemd systems, and only if we are directly spawned | |
1875 | * by PID1. Otherwise we are not guaranteed to have a dedicated cgroup. */ | |
c26d1879 | 1876 | r = cg_pid_get_path(SYSTEMD_CGROUP_CONTROLLER, 0, &cgroup); |
11b9fb15 | 1877 | if (r < 0) { |
a2d61f07 | 1878 | if (IN_SET(r, -ENOENT, -ENOMEDIUM)) |
044497e2 | 1879 | log_debug_errno(r, "Dedicated cgroup not found: %m"); |
11b9fb15 | 1880 | else |
044497e2 | 1881 | log_warning_errno(r, "Failed to get cgroup: %m"); |
11b9fb15 | 1882 | } |
c26d1879 TG |
1883 | } |
1884 | ||
b7f74dd4 | 1885 | r = listen_fds(&fd_ctrl, &fd_uevent); |
0c5a109a ZJS |
1886 | if (r < 0) |
1887 | return log_error_errno(r, "Failed to listen on fds: %m"); | |
b7f74dd4 | 1888 | |
b5af8c8c ZJS |
1889 | r = manager_new(&manager, fd_ctrl, fd_uevent, cgroup); |
1890 | if (r < 0) | |
1891 | return log_error_errno(r, "Failed to create manager: %m"); | |
1892 | ||
bba7a484 | 1893 | if (arg_daemonize) { |
912541b0 | 1894 | pid_t pid; |
912541b0 | 1895 | |
b5af8c8c | 1896 | log_info("Starting version " GIT_VERSION); |
3cbb2057 | 1897 | |
40e749b5 | 1898 | /* connect /dev/null to stdin, stdout, stderr */ |
c76cf844 AK |
1899 | if (log_get_max_level() < LOG_DEBUG) { |
1900 | r = make_null_stdio(); | |
1901 | if (r < 0) | |
1902 | log_warning_errno(r, "Failed to redirect standard streams to /dev/null: %m"); | |
1903 | } | |
1904 | ||
912541b0 | 1905 | pid = fork(); |
0c5a109a ZJS |
1906 | if (pid < 0) |
1907 | return log_error_errno(errno, "Failed to fork daemon: %m"); | |
1908 | if (pid > 0) | |
1909 | /* parent */ | |
1910 | return 0; | |
912541b0 | 1911 | |
0c5a109a | 1912 | /* child */ |
ece0fe12 | 1913 | (void) setsid(); |
7500cd5e | 1914 | } |
912541b0 | 1915 | |
76e62a4d | 1916 | return main_loop(manager); |
7fafc032 | 1917 | } |