]>
Commit | Line | Data |
---|---|---|
db9ecf05 | 1 | /* SPDX-License-Identifier: LGPL-2.1-or-later */ |
a7334b09 | 2 | |
5cb5a6ff | 3 | #include <errno.h> |
8d567588 | 4 | #include <fcntl.h> |
07630cea LP |
5 | #include <limits.h> |
6 | #include <linux/auto_dev-ioctl.h> | |
7 | #include <linux/auto_fs4.h> | |
8d567588 | 8 | #include <sys/epoll.h> |
07630cea | 9 | #include <sys/mount.h> |
8d567588 | 10 | #include <sys/stat.h> |
07630cea | 11 | #include <unistd.h> |
5cb5a6ff | 12 | |
b5efdb8a | 13 | #include "alloc-util.h" |
07630cea | 14 | #include "async.h" |
3ffd4af2 | 15 | #include "automount.h" |
07630cea LP |
16 | #include "bus-error.h" |
17 | #include "bus-util.h" | |
18 | #include "dbus-automount.h" | |
6fcbec6f | 19 | #include "dbus-unit.h" |
3ffd4af2 | 20 | #include "fd-util.h" |
f97b34a6 | 21 | #include "format-util.h" |
c004493c | 22 | #include "io-util.h" |
e51bc1a2 | 23 | #include "label.h" |
49e942b2 | 24 | #include "mkdir.h" |
4349cd7c | 25 | #include "mount-util.h" |
07630cea | 26 | #include "mount.h" |
049af8ad | 27 | #include "mountpoint-util.h" |
6bedfcbb | 28 | #include "parse-util.h" |
9eb977db | 29 | #include "path-util.h" |
0b452006 | 30 | #include "process-util.h" |
d68c645b | 31 | #include "serialize.h" |
07630cea | 32 | #include "special.h" |
15a5e950 | 33 | #include "stdio-util.h" |
8b43440b | 34 | #include "string-table.h" |
07630cea LP |
35 | #include "string-util.h" |
36 | #include "unit-name.h" | |
37 | #include "unit.h" | |
5cb5a6ff | 38 | |
e537352b LP |
39 | static const UnitActiveState state_translation_table[_AUTOMOUNT_STATE_MAX] = { |
40 | [AUTOMOUNT_DEAD] = UNIT_INACTIVE, | |
41 | [AUTOMOUNT_WAITING] = UNIT_ACTIVE, | |
42 | [AUTOMOUNT_RUNNING] = UNIT_ACTIVE, | |
74ac3cbd | 43 | [AUTOMOUNT_FAILED] = UNIT_FAILED |
e537352b | 44 | }; |
5cb5a6ff | 45 | |
deb0a77c MO |
46 | struct expire_data { |
47 | int dev_autofs_fd; | |
48 | int ioctl_fd; | |
49 | }; | |
50 | ||
75db809a | 51 | static struct expire_data* expire_data_free(struct expire_data *data) { |
deb0a77c | 52 | if (!data) |
75db809a | 53 | return NULL; |
deb0a77c MO |
54 | |
55 | safe_close(data->dev_autofs_fd); | |
56 | safe_close(data->ioctl_fd); | |
75db809a | 57 | return mfree(data); |
deb0a77c MO |
58 | } |
59 | ||
60 | DEFINE_TRIVIAL_CLEANUP_FUNC(struct expire_data*, expire_data_free); | |
61 | ||
a16e1123 | 62 | static int open_dev_autofs(Manager *m); |
718db961 | 63 | static int automount_dispatch_io(sd_event_source *s, int fd, uint32_t events, void *userdata); |
dbb0578e LP |
64 | static int automount_start_expire(Automount *a); |
65 | static void automount_stop_expire(Automount *a); | |
66 | static int automount_send_ready(Automount *a, Set *tokens, int status); | |
8d567588 | 67 | |
e537352b LP |
68 | static void automount_init(Unit *u) { |
69 | Automount *a = AUTOMOUNT(u); | |
5cb5a6ff | 70 | |
8d567588 | 71 | assert(u); |
ac155bb8 | 72 | assert(u->load_state == UNIT_STUB); |
8d567588 | 73 | |
718db961 | 74 | a->pipe_fd = -1; |
1cf18f27 | 75 | a->directory_mode = 0755; |
1124fe6f | 76 | UNIT(a)->ignore_on_isolate = true; |
8d567588 LP |
77 | } |
78 | ||
8d567588 | 79 | static void unmount_autofs(Automount *a) { |
3f2c0bec LP |
80 | int r; |
81 | ||
8d567588 LP |
82 | assert(a); |
83 | ||
84 | if (a->pipe_fd < 0) | |
85 | return; | |
86 | ||
5dcadb4c | 87 | a->pipe_event_source = sd_event_source_disable_unref(a->pipe_event_source); |
03e334a1 | 88 | a->pipe_fd = safe_close(a->pipe_fd); |
8d567588 | 89 | |
e350ca3f | 90 | /* If we reload/reexecute things we keep the mount point around */ |
af41e508 | 91 | if (!IN_SET(UNIT(a)->manager->objective, MANAGER_RELOAD, MANAGER_REEXECUTE)) { |
e350ca3f | 92 | |
87d41d62 MO |
93 | automount_send_ready(a, a->tokens, -EHOSTDOWN); |
94 | automount_send_ready(a, a->expire_tokens, -EHOSTDOWN); | |
95 | ||
e350ca3f | 96 | if (a->where) { |
30f5d104 | 97 | r = repeat_unmount(a->where, MNT_DETACH|UMOUNT_NOFOLLOW); |
e350ca3f LP |
98 | if (r < 0) |
99 | log_error_errno(r, "Failed to unmount: %m"); | |
100 | } | |
3f2c0bec | 101 | } |
8d567588 LP |
102 | } |
103 | ||
104 | static void automount_done(Unit *u) { | |
105 | Automount *a = AUTOMOUNT(u); | |
106 | ||
107 | assert(a); | |
108 | ||
109 | unmount_autofs(a); | |
8d567588 | 110 | |
a1e58e8e | 111 | a->where = mfree(a->where); |
a16e1123 | 112 | |
525d3cc7 LP |
113 | a->tokens = set_free(a->tokens); |
114 | a->expire_tokens = set_free(a->expire_tokens); | |
deb0a77c | 115 | |
5dcadb4c | 116 | a->expire_event_source = sd_event_source_disable_unref(a->expire_event_source); |
8d567588 LP |
117 | } |
118 | ||
eef85c4a LP |
119 | static int automount_add_trigger_dependencies(Automount *a) { |
120 | Unit *x; | |
121 | int r; | |
122 | ||
123 | assert(a); | |
124 | ||
125 | r = unit_load_related_unit(UNIT(a), ".mount", &x); | |
126 | if (r < 0) | |
127 | return r; | |
128 | ||
129 | return unit_add_two_dependencies(UNIT(a), UNIT_BEFORE, UNIT_TRIGGERS, x, true, UNIT_DEPENDENCY_IMPLICIT); | |
130 | } | |
131 | ||
132 | static int automount_add_mount_dependencies(Automount *a) { | |
a57f7e2c | 133 | _cleanup_free_ char *parent = NULL; |
6e2ef85b LP |
134 | |
135 | assert(a); | |
1b560190 | 136 | |
5f311f8c LP |
137 | parent = dirname_malloc(a->where); |
138 | if (!parent) | |
139 | return -ENOMEM; | |
6e2ef85b | 140 | |
eef85c4a | 141 | return unit_require_mounts_for(UNIT(a), parent, UNIT_DEPENDENCY_IMPLICIT); |
6e2ef85b LP |
142 | } |
143 | ||
2edd4434 LP |
144 | static int automount_add_default_dependencies(Automount *a) { |
145 | int r; | |
146 | ||
147 | assert(a); | |
148 | ||
4c9ea260 LP |
149 | if (!UNIT(a)->default_dependencies) |
150 | return 0; | |
151 | ||
463d0d15 | 152 | if (!MANAGER_IS_SYSTEM(UNIT(a)->manager)) |
6b1dc2bd | 153 | return 0; |
2a77d31d | 154 | |
b3d7aef5 FB |
155 | r = unit_add_dependency_by_name(UNIT(a), UNIT_BEFORE, SPECIAL_LOCAL_FS_TARGET, true, UNIT_DEPENDENCY_DEFAULT); |
156 | if (r < 0) | |
157 | return r; | |
158 | ||
9432f882 ZJS |
159 | r = unit_add_dependency_by_name(UNIT(a), UNIT_AFTER, SPECIAL_LOCAL_FS_PRE_TARGET, true, UNIT_DEPENDENCY_DEFAULT); |
160 | if (r < 0) | |
161 | return r; | |
162 | ||
5a724170 | 163 | r = unit_add_two_dependencies_by_name(UNIT(a), UNIT_BEFORE, UNIT_CONFLICTS, SPECIAL_UMOUNT_TARGET, true, UNIT_DEPENDENCY_DEFAULT); |
6b1dc2bd LP |
164 | if (r < 0) |
165 | return r; | |
2edd4434 LP |
166 | |
167 | return 0; | |
168 | } | |
169 | ||
8d567588 | 170 | static int automount_verify(Automount *a) { |
e1d75803 | 171 | _cleanup_free_ char *e = NULL; |
7410616c LP |
172 | int r; |
173 | ||
8d567588 | 174 | assert(a); |
75193d41 | 175 | assert(UNIT(a)->load_state == UNIT_LOADED); |
8d567588 | 176 | |
d85ff944 YW |
177 | if (path_equal(a->where, "/")) |
178 | return log_unit_error_errno(UNIT(a), SYNTHETIC_ERRNO(ENOEXEC), "Cannot have an automount unit for the root directory. Refusing."); | |
41e45059 | 179 | |
7410616c LP |
180 | r = unit_name_from_path(a->where, ".automount", &e); |
181 | if (r < 0) | |
b8b846d7 | 182 | return log_unit_error_errno(UNIT(a), r, "Failed to generate unit name from path: %m"); |
8d567588 | 183 | |
d85ff944 YW |
184 | if (!unit_has_name(UNIT(a), e)) |
185 | return log_unit_error_errno(UNIT(a), SYNTHETIC_ERRNO(ENOEXEC), "Where= setting doesn't match unit name. Refusing."); | |
8d567588 LP |
186 | |
187 | return 0; | |
e537352b | 188 | } |
5cb5a6ff | 189 | |
e350ca3f LP |
190 | static int automount_set_where(Automount *a) { |
191 | int r; | |
192 | ||
193 | assert(a); | |
194 | ||
195 | if (a->where) | |
196 | return 0; | |
197 | ||
198 | r = unit_name_to_path(UNIT(a)->id, &a->where); | |
199 | if (r < 0) | |
200 | return r; | |
201 | ||
4ff361cc | 202 | path_simplify(a->where); |
e350ca3f LP |
203 | return 1; |
204 | } | |
205 | ||
75193d41 ZJS |
206 | static int automount_add_extras(Automount *a) { |
207 | int r; | |
208 | ||
209 | r = automount_set_where(a); | |
210 | if (r < 0) | |
211 | return r; | |
212 | ||
213 | r = automount_add_trigger_dependencies(a); | |
214 | if (r < 0) | |
215 | return r; | |
216 | ||
217 | r = automount_add_mount_dependencies(a); | |
218 | if (r < 0) | |
219 | return r; | |
220 | ||
221 | return automount_add_default_dependencies(a); | |
222 | } | |
223 | ||
e537352b | 224 | static int automount_load(Unit *u) { |
e537352b | 225 | Automount *a = AUTOMOUNT(u); |
3ecaa09b | 226 | int r; |
23a177ef | 227 | |
e537352b | 228 | assert(u); |
ac155bb8 | 229 | assert(u->load_state == UNIT_STUB); |
5cb5a6ff | 230 | |
e537352b | 231 | /* Load a .automount file */ |
c3620770 | 232 | r = unit_load_fragment_and_dropin(u, true); |
0b2665c3 | 233 | if (r < 0) |
e537352b | 234 | return r; |
23a177ef | 235 | |
75193d41 ZJS |
236 | if (u->load_state != UNIT_LOADED) |
237 | return 0; | |
4e67ddd6 | 238 | |
75193d41 ZJS |
239 | r = automount_add_extras(a); |
240 | if (r < 0) | |
241 | return r; | |
23a177ef | 242 | |
8d567588 | 243 | return automount_verify(a); |
5cb5a6ff LP |
244 | } |
245 | ||
8d567588 LP |
246 | static void automount_set_state(Automount *a, AutomountState state) { |
247 | AutomountState old_state; | |
e537352b | 248 | assert(a); |
034c6ed7 | 249 | |
6fcbec6f LP |
250 | if (a->state != state) |
251 | bus_unit_send_pending_change_signal(UNIT(a), false); | |
252 | ||
8d567588 LP |
253 | old_state = a->state; |
254 | a->state = state; | |
255 | ||
dbb0578e LP |
256 | if (state != AUTOMOUNT_RUNNING) |
257 | automount_stop_expire(a); | |
258 | ||
ec2ce0c5 | 259 | if (!IN_SET(state, AUTOMOUNT_WAITING, AUTOMOUNT_RUNNING)) |
8d567588 LP |
260 | unmount_autofs(a); |
261 | ||
262 | if (state != old_state) | |
f2341e0a | 263 | log_unit_debug(UNIT(a), "Changed %s -> %s", automount_state_to_string(old_state), automount_state_to_string(state)); |
8d567588 | 264 | |
2ad2e41a | 265 | unit_notify(UNIT(a), state_translation_table[old_state], state_translation_table[state], 0); |
034c6ed7 LP |
266 | } |
267 | ||
be847e82 | 268 | static int automount_coldplug(Unit *u) { |
a16e1123 LP |
269 | Automount *a = AUTOMOUNT(u); |
270 | int r; | |
271 | ||
272 | assert(a); | |
273 | assert(a->state == AUTOMOUNT_DEAD); | |
274 | ||
e350ca3f LP |
275 | if (a->deserialized_state == a->state) |
276 | return 0; | |
277 | ||
278 | if (IN_SET(a->deserialized_state, AUTOMOUNT_WAITING, AUTOMOUNT_RUNNING)) { | |
279 | ||
280 | r = automount_set_where(a); | |
281 | if (r < 0) | |
282 | return r; | |
a16e1123 | 283 | |
0b2665c3 LP |
284 | r = open_dev_autofs(u->manager); |
285 | if (r < 0) | |
a16e1123 LP |
286 | return r; |
287 | ||
e350ca3f LP |
288 | assert(a->pipe_fd >= 0); |
289 | ||
290 | r = sd_event_add_io(u->manager->event, &a->pipe_event_source, a->pipe_fd, EPOLLIN, automount_dispatch_io, u); | |
291 | if (r < 0) | |
292 | return r; | |
a16e1123 | 293 | |
e350ca3f LP |
294 | (void) sd_event_source_set_description(a->pipe_event_source, "automount-io"); |
295 | if (a->deserialized_state == AUTOMOUNT_RUNNING) { | |
296 | r = automount_start_expire(a); | |
0b2665c3 | 297 | if (r < 0) |
e350ca3f | 298 | log_unit_warning_errno(UNIT(a), r, "Failed to start expiration timer, ignoring: %m"); |
a16e1123 LP |
299 | } |
300 | ||
301 | automount_set_state(a, a->deserialized_state); | |
302 | } | |
303 | ||
304 | return 0; | |
305 | } | |
306 | ||
87f0e418 | 307 | static void automount_dump(Unit *u, FILE *f, const char *prefix) { |
a16e1123 | 308 | Automount *a = AUTOMOUNT(u); |
5cb5a6ff | 309 | |
a16e1123 | 310 | assert(a); |
5cb5a6ff LP |
311 | |
312 | fprintf(f, | |
a16e1123 | 313 | "%sAutomount State: %s\n" |
81a5c6d0 | 314 | "%sResult: %s\n" |
1cf18f27 | 315 | "%sWhere: %s\n" |
deb0a77c MO |
316 | "%sDirectoryMode: %04o\n" |
317 | "%sTimeoutIdleUSec: %s\n", | |
a16e1123 | 318 | prefix, automount_state_to_string(a->state), |
81a5c6d0 | 319 | prefix, automount_result_to_string(a->result), |
1cf18f27 | 320 | prefix, a->where, |
deb0a77c | 321 | prefix, a->directory_mode, |
5291f26d | 322 | prefix, FORMAT_TIMESPAN(a->timeout_idle_usec, USEC_PER_SEC)); |
5cb5a6ff LP |
323 | } |
324 | ||
81a5c6d0 | 325 | static void automount_enter_dead(Automount *a, AutomountResult f) { |
8d567588 LP |
326 | assert(a); |
327 | ||
a0fef983 | 328 | if (a->result == AUTOMOUNT_SUCCESS) |
81a5c6d0 | 329 | a->result = f; |
8d567588 | 330 | |
aac99f30 | 331 | unit_log_result(UNIT(a), a->result == AUTOMOUNT_SUCCESS, automount_result_to_string(a->result)); |
81a5c6d0 | 332 | automount_set_state(a, a->result != AUTOMOUNT_SUCCESS ? AUTOMOUNT_FAILED : AUTOMOUNT_DEAD); |
8d567588 LP |
333 | } |
334 | ||
335 | static int open_dev_autofs(Manager *m) { | |
336 | struct autofs_dev_ioctl param; | |
337 | ||
338 | assert(m); | |
339 | ||
340 | if (m->dev_autofs_fd >= 0) | |
341 | return m->dev_autofs_fd; | |
342 | ||
08c84981 | 343 | (void) label_fix("/dev/autofs", 0); |
56cf987f | 344 | |
0b2665c3 | 345 | m->dev_autofs_fd = open("/dev/autofs", O_CLOEXEC|O_RDONLY); |
4a62c710 MS |
346 | if (m->dev_autofs_fd < 0) |
347 | return log_error_errno(errno, "Failed to open /dev/autofs: %m"); | |
8d567588 LP |
348 | |
349 | init_autofs_dev_ioctl(¶m); | |
350 | if (ioctl(m->dev_autofs_fd, AUTOFS_DEV_IOCTL_VERSION, ¶m) < 0) { | |
03e334a1 | 351 | m->dev_autofs_fd = safe_close(m->dev_autofs_fd); |
8d567588 LP |
352 | return -errno; |
353 | } | |
354 | ||
355 | log_debug("Autofs kernel version %i.%i", param.ver_major, param.ver_minor); | |
356 | ||
357 | return m->dev_autofs_fd; | |
358 | } | |
359 | ||
360 | static int open_ioctl_fd(int dev_autofs_fd, const char *where, dev_t devid) { | |
361 | struct autofs_dev_ioctl *param; | |
362 | size_t l; | |
8d567588 LP |
363 | |
364 | assert(dev_autofs_fd >= 0); | |
365 | assert(where); | |
366 | ||
367 | l = sizeof(struct autofs_dev_ioctl) + strlen(where) + 1; | |
0b2665c3 | 368 | param = alloca(l); |
8d567588 LP |
369 | |
370 | init_autofs_dev_ioctl(param); | |
371 | param->size = l; | |
372 | param->ioctlfd = -1; | |
373 | param->openmount.devid = devid; | |
374 | strcpy(param->path, where); | |
375 | ||
0b2665c3 LP |
376 | if (ioctl(dev_autofs_fd, AUTOFS_DEV_IOCTL_OPENMOUNT, param) < 0) |
377 | return -errno; | |
8d567588 | 378 | |
0b2665c3 LP |
379 | if (param->ioctlfd < 0) |
380 | return -EIO; | |
8d567588 | 381 | |
f34beace | 382 | (void) fd_cloexec(param->ioctlfd, true); |
0b2665c3 | 383 | return param->ioctlfd; |
8d567588 LP |
384 | } |
385 | ||
386 | static int autofs_protocol(int dev_autofs_fd, int ioctl_fd) { | |
387 | uint32_t major, minor; | |
388 | struct autofs_dev_ioctl param; | |
389 | ||
390 | assert(dev_autofs_fd >= 0); | |
391 | assert(ioctl_fd >= 0); | |
392 | ||
393 | init_autofs_dev_ioctl(¶m); | |
394 | param.ioctlfd = ioctl_fd; | |
395 | ||
396 | if (ioctl(dev_autofs_fd, AUTOFS_DEV_IOCTL_PROTOVER, ¶m) < 0) | |
397 | return -errno; | |
398 | ||
399 | major = param.protover.version; | |
400 | ||
401 | init_autofs_dev_ioctl(¶m); | |
402 | param.ioctlfd = ioctl_fd; | |
403 | ||
404 | if (ioctl(dev_autofs_fd, AUTOFS_DEV_IOCTL_PROTOSUBVER, ¶m) < 0) | |
405 | return -errno; | |
406 | ||
407 | minor = param.protosubver.sub_version; | |
408 | ||
409 | log_debug("Autofs protocol version %i.%i", major, minor); | |
410 | return 0; | |
411 | } | |
412 | ||
deb0a77c | 413 | static int autofs_set_timeout(int dev_autofs_fd, int ioctl_fd, usec_t usec) { |
8d567588 LP |
414 | struct autofs_dev_ioctl param; |
415 | ||
416 | assert(dev_autofs_fd >= 0); | |
417 | assert(ioctl_fd >= 0); | |
418 | ||
419 | init_autofs_dev_ioctl(¶m); | |
420 | param.ioctlfd = ioctl_fd; | |
deb0a77c | 421 | |
2d79a0bb N |
422 | if (usec == USEC_INFINITY) |
423 | param.timeout.timeout = 0; | |
424 | else | |
425 | /* Convert to seconds, rounding up. */ | |
be6b0c21 | 426 | param.timeout.timeout = DIV_ROUND_UP(usec, USEC_PER_SEC); |
8d567588 LP |
427 | |
428 | if (ioctl(dev_autofs_fd, AUTOFS_DEV_IOCTL_TIMEOUT, ¶m) < 0) | |
429 | return -errno; | |
430 | ||
431 | return 0; | |
432 | } | |
433 | ||
434 | static int autofs_send_ready(int dev_autofs_fd, int ioctl_fd, uint32_t token, int status) { | |
435 | struct autofs_dev_ioctl param; | |
436 | ||
437 | assert(dev_autofs_fd >= 0); | |
438 | assert(ioctl_fd >= 0); | |
439 | ||
440 | init_autofs_dev_ioctl(¶m); | |
441 | param.ioctlfd = ioctl_fd; | |
442 | ||
9703a8ad | 443 | if (status != 0) { |
8d567588 LP |
444 | param.fail.token = token; |
445 | param.fail.status = status; | |
446 | } else | |
447 | param.ready.token = token; | |
448 | ||
449 | if (ioctl(dev_autofs_fd, status ? AUTOFS_DEV_IOCTL_FAIL : AUTOFS_DEV_IOCTL_READY, ¶m) < 0) | |
450 | return -errno; | |
451 | ||
452 | return 0; | |
453 | } | |
454 | ||
deb0a77c | 455 | static int automount_send_ready(Automount *a, Set *tokens, int status) { |
03e334a1 | 456 | _cleanup_close_ int ioctl_fd = -1; |
8d567588 | 457 | unsigned token; |
03e334a1 | 458 | int r; |
8d567588 LP |
459 | |
460 | assert(a); | |
461 | assert(status <= 0); | |
462 | ||
deb0a77c | 463 | if (set_isempty(tokens)) |
8d567588 LP |
464 | return 0; |
465 | ||
0b2665c3 | 466 | ioctl_fd = open_ioctl_fd(UNIT(a)->manager->dev_autofs_fd, a->where, a->dev_id); |
03e334a1 LP |
467 | if (ioctl_fd < 0) |
468 | return ioctl_fd; | |
8d567588 | 469 | |
9703a8ad | 470 | if (status != 0) |
f2341e0a | 471 | log_unit_debug_errno(UNIT(a), status, "Sending failure: %m"); |
8d567588 | 472 | else |
f2341e0a | 473 | log_unit_debug(UNIT(a), "Sending success."); |
8d567588 | 474 | |
e364ad06 LP |
475 | r = 0; |
476 | ||
8d567588 | 477 | /* Autofs thankfully does not hand out 0 as a token */ |
deb0a77c | 478 | while ((token = PTR_TO_UINT(set_steal_first(tokens)))) { |
8d567588 LP |
479 | int k; |
480 | ||
ca5b440a | 481 | /* Autofs fun fact: |
8d567588 | 482 | * |
ca5b440a N |
483 | * if you pass a positive status code here, kernels |
484 | * prior to 4.12 will freeze! Yay! */ | |
8d567588 | 485 | |
0b2665c3 LP |
486 | k = autofs_send_ready(UNIT(a)->manager->dev_autofs_fd, |
487 | ioctl_fd, | |
488 | token, | |
489 | status); | |
490 | if (k < 0) | |
8d567588 LP |
491 | r = k; |
492 | } | |
493 | ||
8d567588 LP |
494 | return r; |
495 | } | |
496 | ||
fae03ed3 LP |
497 | static void automount_trigger_notify(Unit *u, Unit *other) { |
498 | Automount *a = AUTOMOUNT(u); | |
3dbadf9e MO |
499 | int r; |
500 | ||
deb0a77c | 501 | assert(a); |
fae03ed3 LP |
502 | assert(other); |
503 | ||
504 | /* Filter out invocations with bogus state */ | |
0377cd29 LP |
505 | assert(UNIT_IS_LOAD_COMPLETE(other->load_state)); |
506 | assert(other->type == UNIT_MOUNT); | |
fae03ed3 LP |
507 | |
508 | /* Don't propagate state changes from the mount if we are already down */ | |
509 | if (!IN_SET(a->state, AUTOMOUNT_WAITING, AUTOMOUNT_RUNNING)) | |
510 | return; | |
deb0a77c | 511 | |
fae03ed3 LP |
512 | /* Propagate start limit hit state */ |
513 | if (other->start_limit_hit) { | |
514 | automount_enter_dead(a, AUTOMOUNT_FAILURE_MOUNT_START_LIMIT_HIT); | |
515 | return; | |
516 | } | |
9703a8ad | 517 | |
fae03ed3 LP |
518 | /* Don't propagate anything if there's still a job queued */ |
519 | if (other->job) | |
520 | return; | |
521 | ||
522 | /* The mount is successfully established */ | |
523 | if (IN_SET(MOUNT(other)->state, MOUNT_MOUNTED, MOUNT_REMOUNTING)) { | |
524 | (void) automount_send_ready(a, a->tokens, 0); | |
deb0a77c | 525 | |
3dbadf9e MO |
526 | r = automount_start_expire(a); |
527 | if (r < 0) | |
528 | log_unit_warning_errno(UNIT(a), r, "Failed to start expiration timer, ignoring: %m"); | |
deb0a77c | 529 | |
fae03ed3 | 530 | automount_set_state(a, AUTOMOUNT_RUNNING); |
deb0a77c MO |
531 | } |
532 | ||
0a62f810 MO |
533 | if (IN_SET(MOUNT(other)->state, |
534 | MOUNT_MOUNTING, MOUNT_MOUNTING_DONE, | |
535 | MOUNT_MOUNTED, MOUNT_REMOUNTING, | |
0a62f810 MO |
536 | MOUNT_REMOUNTING_SIGTERM, MOUNT_REMOUNTING_SIGKILL, |
537 | MOUNT_UNMOUNTING_SIGTERM, MOUNT_UNMOUNTING_SIGKILL, | |
d46b79bb | 538 | MOUNT_FAILED)) |
0a62f810 | 539 | (void) automount_send_ready(a, a->expire_tokens, -ENODEV); |
0a62f810 MO |
540 | |
541 | if (MOUNT(other)->state == MOUNT_DEAD) | |
542 | (void) automount_send_ready(a, a->expire_tokens, 0); | |
543 | ||
fae03ed3 LP |
544 | /* The mount is in some unhappy state now, let's unfreeze any waiting clients */ |
545 | if (IN_SET(MOUNT(other)->state, | |
546 | MOUNT_DEAD, MOUNT_UNMOUNTING, | |
fae03ed3 LP |
547 | MOUNT_REMOUNTING_SIGTERM, MOUNT_REMOUNTING_SIGKILL, |
548 | MOUNT_UNMOUNTING_SIGTERM, MOUNT_UNMOUNTING_SIGKILL, | |
549 | MOUNT_FAILED)) { | |
deb0a77c | 550 | |
fae03ed3 | 551 | (void) automount_send_ready(a, a->tokens, -ENODEV); |
deb0a77c | 552 | |
fae03ed3 LP |
553 | automount_set_state(a, AUTOMOUNT_WAITING); |
554 | } | |
deb0a77c MO |
555 | } |
556 | ||
8d567588 | 557 | static void automount_enter_waiting(Automount *a) { |
03e334a1 | 558 | _cleanup_close_ int ioctl_fd = -1; |
8d567588 | 559 | int p[2] = { -1, -1 }; |
fbd0b64f LP |
560 | char name[STRLEN("systemd-") + DECIMAL_STR_MAX(pid_t) + 1]; |
561 | char options[STRLEN("fd=,pgrp=,minproto=5,maxproto=5,direct") | |
5ffa8c81 | 562 | + DECIMAL_STR_MAX(int) + DECIMAL_STR_MAX(gid_t) + 1]; |
8d567588 | 563 | bool mounted = false; |
03e334a1 | 564 | int r, dev_autofs_fd; |
8d567588 LP |
565 | struct stat st; |
566 | ||
567 | assert(a); | |
568 | assert(a->pipe_fd < 0); | |
569 | assert(a->where); | |
570 | ||
f2341e0a LP |
571 | set_clear(a->tokens); |
572 | ||
25cd4964 | 573 | r = unit_fail_if_noncanonical(UNIT(a), a->where); |
f2341e0a LP |
574 | if (r < 0) |
575 | goto fail; | |
576 | ||
8084dcb9 | 577 | (void) mkdir_p_label(a->where, a->directory_mode); |
f2341e0a LP |
578 | |
579 | unit_warn_if_dir_nonempty(UNIT(a), a->where); | |
8d567588 | 580 | |
0b2665c3 LP |
581 | dev_autofs_fd = open_dev_autofs(UNIT(a)->manager); |
582 | if (dev_autofs_fd < 0) { | |
8d567588 LP |
583 | r = dev_autofs_fd; |
584 | goto fail; | |
585 | } | |
586 | ||
1cae151d | 587 | if (pipe2(p, O_CLOEXEC) < 0) { |
8d567588 LP |
588 | r = -errno; |
589 | goto fail; | |
590 | } | |
1cae151d N |
591 | r = fd_nonblock(p[0], true); |
592 | if (r < 0) | |
593 | goto fail; | |
8d567588 | 594 | |
5ffa8c81 | 595 | xsprintf(options, "fd=%i,pgrp="PID_FMT",minproto=5,maxproto=5,direct", p[1], getpgrp()); |
df0ff127 | 596 | xsprintf(name, "systemd-"PID_FMT, getpid_cached()); |
511a8cfe LP |
597 | r = mount_nofollow(name, a->where, "autofs", 0, options); |
598 | if (r < 0) | |
8d567588 | 599 | goto fail; |
8d567588 LP |
600 | |
601 | mounted = true; | |
602 | ||
03e334a1 | 603 | p[1] = safe_close(p[1]); |
8d567588 LP |
604 | |
605 | if (stat(a->where, &st) < 0) { | |
606 | r = -errno; | |
607 | goto fail; | |
608 | } | |
609 | ||
0b2665c3 LP |
610 | ioctl_fd = open_ioctl_fd(dev_autofs_fd, a->where, st.st_dev); |
611 | if (ioctl_fd < 0) { | |
8d567588 LP |
612 | r = ioctl_fd; |
613 | goto fail; | |
614 | } | |
615 | ||
0b2665c3 LP |
616 | r = autofs_protocol(dev_autofs_fd, ioctl_fd); |
617 | if (r < 0) | |
8d567588 LP |
618 | goto fail; |
619 | ||
deb0a77c | 620 | r = autofs_set_timeout(dev_autofs_fd, ioctl_fd, a->timeout_idle_usec); |
0b2665c3 | 621 | if (r < 0) |
8d567588 LP |
622 | goto fail; |
623 | ||
151b9b96 | 624 | r = sd_event_add_io(UNIT(a)->manager->event, &a->pipe_event_source, p[0], EPOLLIN, automount_dispatch_io, a); |
0b2665c3 | 625 | if (r < 0) |
8d567588 LP |
626 | goto fail; |
627 | ||
7dfbe2e3 TG |
628 | (void) sd_event_source_set_description(a->pipe_event_source, "automount-io"); |
629 | ||
8d567588 LP |
630 | a->pipe_fd = p[0]; |
631 | a->dev_id = st.st_dev; | |
632 | ||
633 | automount_set_state(a, AUTOMOUNT_WAITING); | |
634 | ||
635 | return; | |
636 | ||
637 | fail: | |
3f2c0bec LP |
638 | log_unit_error_errno(UNIT(a), r, "Failed to initialize automounter: %m"); |
639 | ||
3d94f76c | 640 | safe_close_pair(p); |
8d567588 | 641 | |
3f2c0bec | 642 | if (mounted) { |
30f5d104 | 643 | r = repeat_unmount(a->where, MNT_DETACH|UMOUNT_NOFOLLOW); |
3f2c0bec LP |
644 | if (r < 0) |
645 | log_error_errno(r, "Failed to unmount, ignoring: %m"); | |
646 | } | |
8d567588 | 647 | |
81a5c6d0 | 648 | automount_enter_dead(a, AUTOMOUNT_FAILURE_RESOURCES); |
8d567588 LP |
649 | } |
650 | ||
deb0a77c MO |
651 | static void *expire_thread(void *p) { |
652 | struct autofs_dev_ioctl param; | |
edb83bce | 653 | _cleanup_(expire_data_freep) struct expire_data *data = p; |
deb0a77c MO |
654 | int r; |
655 | ||
656 | assert(data->dev_autofs_fd >= 0); | |
657 | assert(data->ioctl_fd >= 0); | |
658 | ||
659 | init_autofs_dev_ioctl(¶m); | |
660 | param.ioctlfd = data->ioctl_fd; | |
661 | ||
662 | do { | |
663 | r = ioctl(data->dev_autofs_fd, AUTOFS_DEV_IOCTL_EXPIRE, ¶m); | |
664 | } while (r >= 0); | |
665 | ||
666 | if (errno != EAGAIN) | |
667 | log_warning_errno(errno, "Failed to expire automount, ignoring: %m"); | |
668 | ||
669 | return NULL; | |
670 | } | |
671 | ||
deb0a77c MO |
672 | static int automount_dispatch_expire(sd_event_source *source, usec_t usec, void *userdata) { |
673 | Automount *a = AUTOMOUNT(userdata); | |
674 | _cleanup_(expire_data_freep) struct expire_data *data = NULL; | |
675 | int r; | |
676 | ||
677 | assert(a); | |
678 | assert(source == a->expire_event_source); | |
679 | ||
680 | data = new0(struct expire_data, 1); | |
681 | if (!data) | |
682 | return log_oom(); | |
683 | ||
684 | data->ioctl_fd = -1; | |
685 | ||
686 | data->dev_autofs_fd = fcntl(UNIT(a)->manager->dev_autofs_fd, F_DUPFD_CLOEXEC, 3); | |
687 | if (data->dev_autofs_fd < 0) | |
f2341e0a | 688 | return log_unit_error_errno(UNIT(a), errno, "Failed to duplicate autofs fd: %m"); |
deb0a77c MO |
689 | |
690 | data->ioctl_fd = open_ioctl_fd(UNIT(a)->manager->dev_autofs_fd, a->where, a->dev_id); | |
691 | if (data->ioctl_fd < 0) | |
f2341e0a | 692 | return log_unit_error_errno(UNIT(a), data->ioctl_fd, "Couldn't open autofs ioctl fd: %m"); |
deb0a77c MO |
693 | |
694 | r = asynchronous_job(expire_thread, data); | |
695 | if (r < 0) | |
f2341e0a | 696 | return log_unit_error_errno(UNIT(a), r, "Failed to start expire job: %m"); |
deb0a77c MO |
697 | |
698 | data = NULL; | |
699 | ||
700 | return automount_start_expire(a); | |
701 | } | |
702 | ||
703 | static int automount_start_expire(Automount *a) { | |
deb0a77c | 704 | usec_t timeout; |
39cf0351 | 705 | int r; |
deb0a77c MO |
706 | |
707 | assert(a); | |
708 | ||
93a3b53b DM |
709 | if (a->timeout_idle_usec == 0) |
710 | return 0; | |
711 | ||
39cf0351 | 712 | timeout = MAX(a->timeout_idle_usec/3, USEC_PER_SEC); |
deb0a77c MO |
713 | |
714 | if (a->expire_event_source) { | |
39cf0351 | 715 | r = sd_event_source_set_time_relative(a->expire_event_source, timeout); |
deb0a77c MO |
716 | if (r < 0) |
717 | return r; | |
718 | ||
719 | return sd_event_source_set_enabled(a->expire_event_source, SD_EVENT_ONESHOT); | |
720 | } | |
721 | ||
39cf0351 | 722 | r = sd_event_add_time_relative( |
deb0a77c MO |
723 | UNIT(a)->manager->event, |
724 | &a->expire_event_source, | |
725 | CLOCK_MONOTONIC, timeout, 0, | |
726 | automount_dispatch_expire, a); | |
7dfbe2e3 TG |
727 | if (r < 0) |
728 | return r; | |
729 | ||
730 | (void) sd_event_source_set_description(a->expire_event_source, "automount-expire"); | |
731 | ||
732 | return 0; | |
deb0a77c MO |
733 | } |
734 | ||
dbb0578e LP |
735 | static void automount_stop_expire(Automount *a) { |
736 | assert(a); | |
737 | ||
738 | if (!a->expire_event_source) | |
739 | return; | |
740 | ||
741 | (void) sd_event_source_set_enabled(a->expire_event_source, SD_EVENT_OFF); | |
742 | } | |
743 | ||
e7d54bf5 | 744 | static void automount_enter_running(Automount *a) { |
4afd3348 | 745 | _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL; |
e7d54bf5 | 746 | Unit *trigger; |
3ecaa09b LP |
747 | struct stat st; |
748 | int r; | |
8d567588 LP |
749 | |
750 | assert(a); | |
8d567588 | 751 | |
e350ca3f LP |
752 | /* If the user masked our unit in the meantime, fail */ |
753 | if (UNIT(a)->load_state != UNIT_LOADED) { | |
754 | log_unit_error(UNIT(a), "Suppressing automount event since unit is no longer loaded."); | |
755 | goto fail; | |
756 | } | |
757 | ||
ba3e67a7 LP |
758 | /* We don't take mount requests anymore if we are supposed to |
759 | * shut down anyway */ | |
31afa0a4 | 760 | if (unit_stop_pending(UNIT(a))) { |
f2341e0a | 761 | log_unit_debug(UNIT(a), "Suppressing automount request since unit stop is scheduled."); |
deb0a77c MO |
762 | automount_send_ready(a, a->tokens, -EHOSTDOWN); |
763 | automount_send_ready(a, a->expire_tokens, -EHOSTDOWN); | |
ba3e67a7 LP |
764 | return; |
765 | } | |
766 | ||
6e5dcce4 | 767 | (void) mkdir_p_label(a->where, a->directory_mode); |
8d567588 | 768 | |
1cf18f27 LP |
769 | /* Before we do anything, let's see if somebody is playing games with us? */ |
770 | if (lstat(a->where, &st) < 0) { | |
f2341e0a | 771 | log_unit_warning_errno(UNIT(a), errno, "Failed to stat automount point: %m"); |
8d567588 LP |
772 | goto fail; |
773 | } | |
774 | ||
e7d54bf5 AC |
775 | /* The mount unit may have been explicitly started before we got the |
776 | * autofs request. Ack it to unblock anything waiting on the mount point. */ | |
777 | if (!S_ISDIR(st.st_mode) || st.st_dev != a->dev_id) { | |
f2341e0a | 778 | log_unit_info(UNIT(a), "Automount point already active?"); |
e7d54bf5 AC |
779 | automount_send_ready(a, a->tokens, 0); |
780 | return; | |
781 | } | |
e903182e | 782 | |
e7d54bf5 AC |
783 | trigger = UNIT_TRIGGER(UNIT(a)); |
784 | if (!trigger) { | |
785 | log_unit_error(UNIT(a), "Unit to trigger vanished."); | |
786 | goto fail; | |
787 | } | |
e903182e | 788 | |
50cbaba4 | 789 | r = manager_add_job(UNIT(a)->manager, JOB_START, trigger, JOB_REPLACE, NULL, &error, NULL); |
e7d54bf5 AC |
790 | if (r < 0) { |
791 | log_unit_warning(UNIT(a), "Failed to queue mount startup job: %s", bus_error_message(&error, r)); | |
792 | goto fail; | |
8d567588 LP |
793 | } |
794 | ||
795 | automount_set_state(a, AUTOMOUNT_RUNNING); | |
796 | return; | |
797 | ||
798 | fail: | |
81a5c6d0 | 799 | automount_enter_dead(a, AUTOMOUNT_FAILURE_RESOURCES); |
8d567588 LP |
800 | } |
801 | ||
802 | static int automount_start(Unit *u) { | |
803 | Automount *a = AUTOMOUNT(u); | |
07299350 | 804 | int r; |
8d567588 LP |
805 | |
806 | assert(a); | |
3742095b | 807 | assert(IN_SET(a->state, AUTOMOUNT_DEAD, AUTOMOUNT_FAILED)); |
01f78473 | 808 | |
d85ff944 YW |
809 | if (path_is_mount_point(a->where, NULL, 0) > 0) |
810 | return log_unit_error_errno(u, SYNTHETIC_ERRNO(EEXIST), "Path %s is already a mount point, refusing start.", a->where); | |
8d567588 | 811 | |
a4191c9f LP |
812 | r = unit_test_trigger_loaded(u); |
813 | if (r < 0) | |
814 | return r; | |
8d567588 | 815 | |
97a3f4ee | 816 | r = unit_test_start_limit(u); |
07299350 LP |
817 | if (r < 0) { |
818 | automount_enter_dead(a, AUTOMOUNT_FAILURE_START_LIMIT_HIT); | |
819 | return r; | |
820 | } | |
821 | ||
4b58153d LP |
822 | r = unit_acquire_invocation_id(u); |
823 | if (r < 0) | |
824 | return r; | |
825 | ||
81a5c6d0 | 826 | a->result = AUTOMOUNT_SUCCESS; |
8d567588 | 827 | automount_enter_waiting(a); |
82a2b6bb | 828 | return 1; |
8d567588 LP |
829 | } |
830 | ||
831 | static int automount_stop(Unit *u) { | |
832 | Automount *a = AUTOMOUNT(u); | |
833 | ||
834 | assert(a); | |
3742095b | 835 | assert(IN_SET(a->state, AUTOMOUNT_WAITING, AUTOMOUNT_RUNNING)); |
8d567588 | 836 | |
81a5c6d0 | 837 | automount_enter_dead(a, AUTOMOUNT_SUCCESS); |
82a2b6bb | 838 | return 1; |
8d567588 LP |
839 | } |
840 | ||
a16e1123 LP |
841 | static int automount_serialize(Unit *u, FILE *f, FDSet *fds) { |
842 | Automount *a = AUTOMOUNT(u); | |
a34ceba6 LP |
843 | void *p; |
844 | int r; | |
a16e1123 LP |
845 | |
846 | assert(a); | |
847 | assert(f); | |
848 | assert(fds); | |
849 | ||
d68c645b LP |
850 | (void) serialize_item(f, "state", automount_state_to_string(a->state)); |
851 | (void) serialize_item(f, "result", automount_result_to_string(a->result)); | |
852 | (void) serialize_item_format(f, "dev-id", "%lu", (unsigned long) a->dev_id); | |
a16e1123 | 853 | |
90e74a66 | 854 | SET_FOREACH(p, a->tokens) |
d68c645b | 855 | (void) serialize_item_format(f, "token", "%u", PTR_TO_UINT(p)); |
90e74a66 | 856 | SET_FOREACH(p, a->expire_tokens) |
d68c645b | 857 | (void) serialize_item_format(f, "expire-token", "%u", PTR_TO_UINT(p)); |
a16e1123 | 858 | |
d68c645b | 859 | r = serialize_fd(f, fds, "pipe-fd", a->pipe_fd); |
a34ceba6 LP |
860 | if (r < 0) |
861 | return r; | |
a16e1123 LP |
862 | |
863 | return 0; | |
864 | } | |
865 | ||
866 | static int automount_deserialize_item(Unit *u, const char *key, const char *value, FDSet *fds) { | |
867 | Automount *a = AUTOMOUNT(u); | |
868 | int r; | |
869 | ||
870 | assert(a); | |
871 | assert(fds); | |
872 | ||
873 | if (streq(key, "state")) { | |
874 | AutomountState state; | |
875 | ||
0b2665c3 LP |
876 | state = automount_state_from_string(value); |
877 | if (state < 0) | |
f2341e0a | 878 | log_unit_debug(u, "Failed to parse state value: %s", value); |
a16e1123 LP |
879 | else |
880 | a->deserialized_state = state; | |
81a5c6d0 LP |
881 | } else if (streq(key, "result")) { |
882 | AutomountResult f; | |
883 | ||
884 | f = automount_result_from_string(value); | |
885 | if (f < 0) | |
f2341e0a | 886 | log_unit_debug(u, "Failed to parse result value: %s", value); |
81a5c6d0 LP |
887 | else if (f != AUTOMOUNT_SUCCESS) |
888 | a->result = f; | |
a16e1123 | 889 | |
a16e1123 | 890 | } else if (streq(key, "dev-id")) { |
a2a44444 | 891 | unsigned long d; |
a16e1123 | 892 | |
a2a44444 | 893 | if (safe_atolu(value, &d) < 0) |
f2341e0a | 894 | log_unit_debug(u, "Failed to parse dev-id value: %s", value); |
a16e1123 | 895 | else |
a2a44444 LP |
896 | a->dev_id = (dev_t) d; |
897 | ||
a16e1123 LP |
898 | } else if (streq(key, "token")) { |
899 | unsigned token; | |
900 | ||
901 | if (safe_atou(value, &token) < 0) | |
f2341e0a | 902 | log_unit_debug(u, "Failed to parse token value: %s", value); |
a16e1123 | 903 | else { |
de7fef4b | 904 | r = set_ensure_put(&a->tokens, NULL, UINT_TO_PTR(token)); |
0b2665c3 | 905 | if (r < 0) |
f2341e0a | 906 | log_unit_error_errno(u, r, "Failed to add token to set: %m"); |
a16e1123 | 907 | } |
deb0a77c MO |
908 | } else if (streq(key, "expire-token")) { |
909 | unsigned token; | |
910 | ||
911 | if (safe_atou(value, &token) < 0) | |
f2341e0a | 912 | log_unit_debug(u, "Failed to parse token value: %s", value); |
deb0a77c | 913 | else { |
de7fef4b | 914 | r = set_ensure_put(&a->expire_tokens, NULL, UINT_TO_PTR(token)); |
deb0a77c | 915 | if (r < 0) |
f2341e0a | 916 | log_unit_error_errno(u, r, "Failed to add expire token to set: %m"); |
deb0a77c | 917 | } |
a16e1123 LP |
918 | } else if (streq(key, "pipe-fd")) { |
919 | int fd; | |
920 | ||
921 | if (safe_atoi(value, &fd) < 0 || fd < 0 || !fdset_contains(fds, fd)) | |
f2341e0a | 922 | log_unit_debug(u, "Failed to parse pipe-fd value: %s", value); |
a16e1123 | 923 | else { |
03e334a1 | 924 | safe_close(a->pipe_fd); |
a16e1123 LP |
925 | a->pipe_fd = fdset_remove(fds, fd); |
926 | } | |
927 | } else | |
f2341e0a | 928 | log_unit_debug(u, "Unknown serialization key: %s", key); |
a16e1123 LP |
929 | |
930 | return 0; | |
931 | } | |
932 | ||
87f0e418 | 933 | static UnitActiveState automount_active_state(Unit *u) { |
a16e1123 | 934 | assert(u); |
87f0e418 | 935 | |
e537352b | 936 | return state_translation_table[AUTOMOUNT(u)->state]; |
5cb5a6ff LP |
937 | } |
938 | ||
10a94420 LP |
939 | static const char *automount_sub_state_to_string(Unit *u) { |
940 | assert(u); | |
941 | ||
a16e1123 | 942 | return automount_state_to_string(AUTOMOUNT(u)->state); |
10a94420 LP |
943 | } |
944 | ||
f2f725e5 ZJS |
945 | static bool automount_may_gc(Unit *u) { |
946 | Unit *t; | |
947 | ||
3ecaa09b | 948 | assert(u); |
701cc384 | 949 | |
f2f725e5 ZJS |
950 | t = UNIT_TRIGGER(u); |
951 | if (!t) | |
952 | return true; | |
7573916f | 953 | |
f2f725e5 | 954 | return UNIT_VTABLE(t)->may_gc(t); |
701cc384 LP |
955 | } |
956 | ||
718db961 | 957 | static int automount_dispatch_io(sd_event_source *s, int fd, uint32_t events, void *userdata) { |
4afd3348 | 958 | _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL; |
8d567588 | 959 | union autofs_v5_packet_union packet; |
718db961 | 960 | Automount *a = AUTOMOUNT(userdata); |
e903182e | 961 | Unit *trigger; |
8d567588 LP |
962 | int r; |
963 | ||
8d567588 LP |
964 | assert(a); |
965 | assert(fd == a->pipe_fd); | |
966 | ||
acd156d1 LP |
967 | if (events & (EPOLLHUP|EPOLLERR)) { |
968 | log_unit_error(UNIT(a), "Got hangup/error on autofs pipe from kernel. Likely our automount point has been unmounted by someone or something else?"); | |
969 | automount_enter_dead(a, AUTOMOUNT_FAILURE_UNMOUNTED); | |
970 | return 0; | |
971 | } | |
972 | ||
8d567588 | 973 | if (events != EPOLLIN) { |
f2341e0a | 974 | log_unit_error(UNIT(a), "Got invalid poll event %"PRIu32" on pipe (fd=%d)", events, fd); |
8d567588 LP |
975 | goto fail; |
976 | } | |
977 | ||
a6dcc7e5 ZJS |
978 | r = loop_read_exact(a->pipe_fd, &packet, sizeof(packet), true); |
979 | if (r < 0) { | |
f2341e0a | 980 | log_unit_error_errno(UNIT(a), r, "Invalid read from pipe: %m"); |
8d567588 LP |
981 | goto fail; |
982 | } | |
983 | ||
984 | switch (packet.hdr.type) { | |
985 | ||
986 | case autofs_ptype_missing_direct: | |
941a4041 LP |
987 | |
988 | if (packet.v5_packet.pid > 0) { | |
e42e801b | 989 | _cleanup_free_ char *p = NULL; |
941a4041 | 990 | |
74d6421d | 991 | (void) get_process_comm(packet.v5_packet.pid, &p); |
f2341e0a | 992 | log_unit_info(UNIT(a), "Got automount request for %s, triggered by %"PRIu32" (%s)", a->where, packet.v5_packet.pid, strna(p)); |
941a4041 | 993 | } else |
f2341e0a | 994 | log_unit_debug(UNIT(a), "Got direct mount request on %s", a->where); |
8d567588 | 995 | |
de7fef4b | 996 | r = set_ensure_put(&a->tokens, NULL, UINT_TO_PTR(packet.v5_packet.wait_queue_token)); |
0b2665c3 | 997 | if (r < 0) { |
f2341e0a | 998 | log_unit_error_errno(UNIT(a), r, "Failed to remember token: %m"); |
8d567588 LP |
999 | goto fail; |
1000 | } | |
1001 | ||
e7d54bf5 | 1002 | automount_enter_running(a); |
8d567588 LP |
1003 | break; |
1004 | ||
deb0a77c | 1005 | case autofs_ptype_expire_direct: |
f2341e0a | 1006 | log_unit_debug(UNIT(a), "Got direct umount request on %s", a->where); |
deb0a77c | 1007 | |
dbb0578e | 1008 | automount_stop_expire(a); |
deb0a77c | 1009 | |
de7fef4b | 1010 | r = set_ensure_put(&a->expire_tokens, NULL, UINT_TO_PTR(packet.v5_packet.wait_queue_token)); |
deb0a77c | 1011 | if (r < 0) { |
f2341e0a | 1012 | log_unit_error_errno(UNIT(a), r, "Failed to remember token: %m"); |
deb0a77c MO |
1013 | goto fail; |
1014 | } | |
5f8ae398 | 1015 | |
e903182e LP |
1016 | trigger = UNIT_TRIGGER(UNIT(a)); |
1017 | if (!trigger) { | |
1018 | log_unit_error(UNIT(a), "Unit to trigger vanished."); | |
1019 | goto fail; | |
1020 | } | |
1021 | ||
50cbaba4 | 1022 | r = manager_add_job(UNIT(a)->manager, JOB_STOP, trigger, JOB_REPLACE, NULL, &error, NULL); |
deb0a77c | 1023 | if (r < 0) { |
f2341e0a | 1024 | log_unit_warning(UNIT(a), "Failed to queue umount startup job: %s", bus_error_message(&error, r)); |
deb0a77c MO |
1025 | goto fail; |
1026 | } | |
1027 | break; | |
1028 | ||
8d567588 | 1029 | default: |
f2341e0a | 1030 | log_unit_error(UNIT(a), "Received unknown automount request %i", packet.hdr.type); |
8d567588 LP |
1031 | break; |
1032 | } | |
1033 | ||
718db961 | 1034 | return 0; |
8d567588 LP |
1035 | |
1036 | fail: | |
81a5c6d0 | 1037 | automount_enter_dead(a, AUTOMOUNT_FAILURE_RESOURCES); |
718db961 | 1038 | return 0; |
8d567588 LP |
1039 | } |
1040 | ||
1041 | static void automount_shutdown(Manager *m) { | |
1042 | assert(m); | |
1043 | ||
03e334a1 | 1044 | m->dev_autofs_fd = safe_close(m->dev_autofs_fd); |
8d567588 LP |
1045 | } |
1046 | ||
74ac3cbd | 1047 | static void automount_reset_failed(Unit *u) { |
5632e374 LP |
1048 | Automount *a = AUTOMOUNT(u); |
1049 | ||
1050 | assert(a); | |
1051 | ||
74ac3cbd | 1052 | if (a->state == AUTOMOUNT_FAILED) |
5632e374 LP |
1053 | automount_set_state(a, AUTOMOUNT_DEAD); |
1054 | ||
81a5c6d0 | 1055 | a->result = AUTOMOUNT_SUCCESS; |
5632e374 LP |
1056 | } |
1057 | ||
1c2e9646 | 1058 | static bool automount_supported(void) { |
0faacd47 LP |
1059 | static int supported = -1; |
1060 | ||
0faacd47 LP |
1061 | if (supported < 0) |
1062 | supported = access("/dev/autofs", F_OK) >= 0; | |
1063 | ||
1064 | return supported; | |
1065 | } | |
1066 | ||
81a5c6d0 LP |
1067 | static const char* const automount_result_table[_AUTOMOUNT_RESULT_MAX] = { |
1068 | [AUTOMOUNT_SUCCESS] = "success", | |
07299350 LP |
1069 | [AUTOMOUNT_FAILURE_RESOURCES] = "resources", |
1070 | [AUTOMOUNT_FAILURE_START_LIMIT_HIT] = "start-limit-hit", | |
fae03ed3 | 1071 | [AUTOMOUNT_FAILURE_MOUNT_START_LIMIT_HIT] = "mount-start-limit-hit", |
acd156d1 | 1072 | [AUTOMOUNT_FAILURE_UNMOUNTED] = "unmounted", |
81a5c6d0 LP |
1073 | }; |
1074 | ||
1075 | DEFINE_STRING_TABLE_LOOKUP(automount_result, AutomountResult); | |
1076 | ||
87f0e418 | 1077 | const UnitVTable automount_vtable = { |
7d17cfbc | 1078 | .object_size = sizeof(Automount), |
718db961 | 1079 | |
f975e971 LP |
1080 | .sections = |
1081 | "Unit\0" | |
1082 | "Automount\0" | |
1083 | "Install\0", | |
2fadbb45 | 1084 | .private_section = "Automount", |
5cb5a6ff | 1085 | |
c80a9a33 LP |
1086 | .can_transient = true, |
1087 | .can_fail = true, | |
1088 | .can_trigger = true, | |
755021d4 | 1089 | .exclude_from_switch_root_serialization = true, |
c80a9a33 | 1090 | |
034c6ed7 | 1091 | .init = automount_init, |
e537352b | 1092 | .load = automount_load, |
034c6ed7 | 1093 | .done = automount_done, |
5cb5a6ff | 1094 | |
a16e1123 LP |
1095 | .coldplug = automount_coldplug, |
1096 | ||
034c6ed7 | 1097 | .dump = automount_dump, |
5cb5a6ff | 1098 | |
8d567588 LP |
1099 | .start = automount_start, |
1100 | .stop = automount_stop, | |
1101 | ||
a16e1123 LP |
1102 | .serialize = automount_serialize, |
1103 | .deserialize_item = automount_deserialize_item, | |
1104 | ||
10a94420 | 1105 | .active_state = automount_active_state, |
8d567588 LP |
1106 | .sub_state_to_string = automount_sub_state_to_string, |
1107 | ||
f2f725e5 | 1108 | .may_gc = automount_may_gc, |
701cc384 | 1109 | |
fae03ed3 LP |
1110 | .trigger_notify = automount_trigger_notify, |
1111 | ||
74ac3cbd | 1112 | .reset_failed = automount_reset_failed, |
5632e374 | 1113 | |
afb14803 MO |
1114 | .bus_set_property = bus_automount_set_property, |
1115 | ||
c6918296 | 1116 | .shutdown = automount_shutdown, |
0faacd47 | 1117 | .supported = automount_supported, |
c6918296 MS |
1118 | |
1119 | .status_message_formats = { | |
1120 | .finished_start_job = { | |
1121 | [JOB_DONE] = "Set up automount %s.", | |
1122 | [JOB_FAILED] = "Failed to set up automount %s.", | |
c6918296 MS |
1123 | }, |
1124 | .finished_stop_job = { | |
1125 | [JOB_DONE] = "Unset automount %s.", | |
1126 | [JOB_FAILED] = "Failed to unset automount %s.", | |
1127 | }, | |
1128 | }, | |
5cb5a6ff | 1129 | }; |