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d6c9574f | 1 | /*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/ |
5cb5a6ff | 2 | |
a7334b09 LP |
3 | /*** |
4 | This file is part of systemd. | |
5 | ||
6 | Copyright 2010 Lennart Poettering | |
7 | ||
8 | systemd is free software; you can redistribute it and/or modify it | |
5430f7f2 LP |
9 | under the terms of the GNU Lesser General Public License as published by |
10 | the Free Software Foundation; either version 2.1 of the License, or | |
a7334b09 LP |
11 | (at your option) any later version. |
12 | ||
13 | systemd is distributed in the hope that it will be useful, but | |
14 | WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
5430f7f2 | 16 | Lesser General Public License for more details. |
a7334b09 | 17 | |
5430f7f2 | 18 | You should have received a copy of the GNU Lesser General Public License |
a7334b09 LP |
19 | along with systemd; If not, see <http://www.gnu.org/licenses/>. |
20 | ***/ | |
21 | ||
5cb5a6ff | 22 | #include <errno.h> |
4f5dd394 | 23 | #include <signal.h> |
b08d03ff | 24 | #include <stdio.h> |
ef734fd6 | 25 | #include <sys/epoll.h> |
5cb5a6ff | 26 | |
20ad4cfd | 27 | #include "sd-messages.h" |
4f5dd394 | 28 | |
b5efdb8a | 29 | #include "alloc-util.h" |
4139c1b2 | 30 | #include "dbus-mount.h" |
4f5dd394 | 31 | #include "escape.h" |
9a57c629 | 32 | #include "exit-status.h" |
6482f626 | 33 | #include "formats-util.h" |
4f5dd394 LP |
34 | #include "fstab-util.h" |
35 | #include "log.h" | |
36 | #include "manager.h" | |
37 | #include "mkdir.h" | |
38 | #include "mount-setup.h" | |
4e036b7a | 39 | #include "mount-util.h" |
4f5dd394 | 40 | #include "mount.h" |
6bedfcbb | 41 | #include "parse-util.h" |
4f5dd394 | 42 | #include "path-util.h" |
7b3e062c | 43 | #include "process-util.h" |
4f5dd394 | 44 | #include "special.h" |
8b43440b | 45 | #include "string-table.h" |
b5efdb8a | 46 | #include "string-util.h" |
4f5dd394 LP |
47 | #include "strv.h" |
48 | #include "unit-name.h" | |
49 | #include "unit.h" | |
5cb5a6ff | 50 | |
7d54a03a LP |
51 | #define RETRY_UMOUNT_MAX 32 |
52 | ||
4e920142 ZJS |
53 | DEFINE_TRIVIAL_CLEANUP_FUNC(struct libmnt_table*, mnt_free_table); |
54 | DEFINE_TRIVIAL_CLEANUP_FUNC(struct libmnt_iter*, mnt_free_iter); | |
55 | ||
f50e0a01 LP |
56 | static const UnitActiveState state_translation_table[_MOUNT_STATE_MAX] = { |
57 | [MOUNT_DEAD] = UNIT_INACTIVE, | |
58 | [MOUNT_MOUNTING] = UNIT_ACTIVATING, | |
e537352b | 59 | [MOUNT_MOUNTING_DONE] = UNIT_ACTIVE, |
f50e0a01 | 60 | [MOUNT_MOUNTED] = UNIT_ACTIVE, |
032ff4af | 61 | [MOUNT_REMOUNTING] = UNIT_RELOADING, |
f50e0a01 | 62 | [MOUNT_UNMOUNTING] = UNIT_DEACTIVATING, |
e537352b LP |
63 | [MOUNT_MOUNTING_SIGTERM] = UNIT_DEACTIVATING, |
64 | [MOUNT_MOUNTING_SIGKILL] = UNIT_DEACTIVATING, | |
032ff4af LP |
65 | [MOUNT_REMOUNTING_SIGTERM] = UNIT_RELOADING, |
66 | [MOUNT_REMOUNTING_SIGKILL] = UNIT_RELOADING, | |
e537352b LP |
67 | [MOUNT_UNMOUNTING_SIGTERM] = UNIT_DEACTIVATING, |
68 | [MOUNT_UNMOUNTING_SIGKILL] = UNIT_DEACTIVATING, | |
fdf20a31 | 69 | [MOUNT_FAILED] = UNIT_FAILED |
f50e0a01 | 70 | }; |
5cb5a6ff | 71 | |
718db961 LP |
72 | static int mount_dispatch_timer(sd_event_source *source, usec_t usec, void *userdata); |
73 | static int mount_dispatch_io(sd_event_source *source, int fd, uint32_t revents, void *userdata); | |
74 | ||
affc3d83 | 75 | static bool mount_needs_network(const char *options, const char *fstype) { |
d15d0333 | 76 | if (fstab_test_option(options, "_netdev\0")) |
fc676b00 ZJS |
77 | return true; |
78 | ||
affc3d83 | 79 | if (fstype && fstype_is_network(fstype)) |
fc676b00 ZJS |
80 | return true; |
81 | ||
82 | return false; | |
83 | } | |
84 | ||
e6a7b9f4 | 85 | static bool mount_is_network(const MountParameters *p) { |
affc3d83 CL |
86 | assert(p); |
87 | ||
88 | return mount_needs_network(p->options, p->fstype); | |
89 | } | |
90 | ||
e6a7b9f4 | 91 | static bool mount_is_bind(const MountParameters *p) { |
fc676b00 ZJS |
92 | assert(p); |
93 | ||
d15d0333 | 94 | if (fstab_test_option(p->options, "bind\0" "rbind\0")) |
fc676b00 ZJS |
95 | return true; |
96 | ||
d15d0333 | 97 | if (p->fstype && STR_IN_SET(p->fstype, "bind", "rbind")) |
fc676b00 ZJS |
98 | return true; |
99 | ||
100 | return false; | |
101 | } | |
102 | ||
e6a7b9f4 | 103 | static bool mount_is_auto(const MountParameters *p) { |
fc676b00 ZJS |
104 | assert(p); |
105 | ||
d15d0333 | 106 | return !fstab_test_option(p->options, "noauto\0"); |
fc676b00 ZJS |
107 | } |
108 | ||
e6a7b9f4 | 109 | static bool needs_quota(const MountParameters *p) { |
fc676b00 ZJS |
110 | assert(p); |
111 | ||
11041c84 | 112 | /* Quotas are not enabled on network filesystems, |
340a1d23 | 113 | * but we want them, for example, on storage connected via iscsi */ |
11041c84 | 114 | if (p->fstype && fstype_is_network(p->fstype)) |
fc676b00 ZJS |
115 | return false; |
116 | ||
117 | if (mount_is_bind(p)) | |
118 | return false; | |
119 | ||
d15d0333 ZJS |
120 | return fstab_test_option(p->options, |
121 | "usrquota\0" "grpquota\0" "quota\0" "usrjquota\0" "grpjquota\0"); | |
fc676b00 ZJS |
122 | } |
123 | ||
a16e1123 LP |
124 | static void mount_init(Unit *u) { |
125 | Mount *m = MOUNT(u); | |
5cb5a6ff | 126 | |
a16e1123 | 127 | assert(u); |
ac155bb8 | 128 | assert(u->load_state == UNIT_STUB); |
a16e1123 | 129 | |
1f19a534 | 130 | m->timeout_usec = u->manager->default_timeout_start_usec; |
3e5235b0 LP |
131 | m->directory_mode = 0755; |
132 | ||
6b1dc2bd LP |
133 | if (unit_has_name(u, "-.mount")) { |
134 | /* Don't allow start/stop for root directory */ | |
5bcb0f2b LP |
135 | u->refuse_manual_start = true; |
136 | u->refuse_manual_stop = true; | |
6b1dc2bd LP |
137 | } else { |
138 | /* The stdio/kmsg bridge socket is on /, in order to avoid a | |
139 | * dep loop, don't use kmsg logging for -.mount */ | |
ac155bb8 MS |
140 | m->exec_context.std_output = u->manager->default_std_output; |
141 | m->exec_context.std_error = u->manager->default_std_error; | |
f6cebb3b | 142 | } |
c3686083 | 143 | |
f00929ad DJL |
144 | /* We need to make sure that /usr/bin/mount is always called |
145 | * in the same process group as us, so that the autofs kernel | |
a16e1123 LP |
146 | * side doesn't send us another mount request while we are |
147 | * already trying to comply its last one. */ | |
74922904 | 148 | m->exec_context.same_pgrp = true; |
8d567588 | 149 | |
a16e1123 | 150 | m->control_command_id = _MOUNT_EXEC_COMMAND_INVALID; |
c8f4d764 | 151 | |
5bcb0f2b | 152 | u->ignore_on_isolate = true; |
8d567588 LP |
153 | } |
154 | ||
718db961 LP |
155 | static int mount_arm_timer(Mount *m) { |
156 | int r; | |
157 | ||
158 | assert(m); | |
159 | ||
160 | if (m->timeout_usec <= 0) { | |
161 | m->timer_event_source = sd_event_source_unref(m->timer_event_source); | |
162 | return 0; | |
163 | } | |
164 | ||
165 | if (m->timer_event_source) { | |
166 | r = sd_event_source_set_time(m->timer_event_source, now(CLOCK_MONOTONIC) + m->timeout_usec); | |
167 | if (r < 0) | |
168 | return r; | |
169 | ||
170 | return sd_event_source_set_enabled(m->timer_event_source, SD_EVENT_ONESHOT); | |
171 | } | |
172 | ||
7dfbe2e3 | 173 | r = sd_event_add_time( |
6a0f1f6d LP |
174 | UNIT(m)->manager->event, |
175 | &m->timer_event_source, | |
176 | CLOCK_MONOTONIC, | |
177 | now(CLOCK_MONOTONIC) + m->timeout_usec, 0, | |
178 | mount_dispatch_timer, m); | |
7dfbe2e3 TG |
179 | if (r < 0) |
180 | return r; | |
181 | ||
182 | (void) sd_event_source_set_description(m->timer_event_source, "mount-timer"); | |
183 | ||
184 | return 0; | |
718db961 LP |
185 | } |
186 | ||
a16e1123 | 187 | static void mount_unwatch_control_pid(Mount *m) { |
5e94833f LP |
188 | assert(m); |
189 | ||
190 | if (m->control_pid <= 0) | |
191 | return; | |
192 | ||
193 | unit_unwatch_pid(UNIT(m), m->control_pid); | |
194 | m->control_pid = 0; | |
195 | } | |
196 | ||
e537352b LP |
197 | static void mount_parameters_done(MountParameters *p) { |
198 | assert(p); | |
199 | ||
200 | free(p->what); | |
201 | free(p->options); | |
202 | free(p->fstype); | |
203 | ||
204 | p->what = p->options = p->fstype = NULL; | |
205 | } | |
206 | ||
87f0e418 | 207 | static void mount_done(Unit *u) { |
ef734fd6 | 208 | Mount *m = MOUNT(u); |
034c6ed7 | 209 | |
ef734fd6 | 210 | assert(m); |
034c6ed7 | 211 | |
a1e58e8e | 212 | m->where = mfree(m->where); |
f50e0a01 | 213 | |
e537352b LP |
214 | mount_parameters_done(&m->parameters_proc_self_mountinfo); |
215 | mount_parameters_done(&m->parameters_fragment); | |
ef734fd6 | 216 | |
613b411c | 217 | m->exec_runtime = exec_runtime_unref(m->exec_runtime); |
e537352b LP |
218 | exec_command_done_array(m->exec_command, _MOUNT_EXEC_COMMAND_MAX); |
219 | m->control_command = NULL; | |
f50e0a01 | 220 | |
a16e1123 | 221 | mount_unwatch_control_pid(m); |
f50e0a01 | 222 | |
718db961 | 223 | m->timer_event_source = sd_event_source_unref(m->timer_event_source); |
f50e0a01 LP |
224 | } |
225 | ||
44a6b1b6 | 226 | _pure_ static MountParameters* get_mount_parameters_fragment(Mount *m) { |
cb39ed3f LP |
227 | assert(m); |
228 | ||
229 | if (m->from_fragment) | |
230 | return &m->parameters_fragment; | |
cb39ed3f LP |
231 | |
232 | return NULL; | |
233 | } | |
234 | ||
44a6b1b6 | 235 | _pure_ static MountParameters* get_mount_parameters(Mount *m) { |
cb39ed3f LP |
236 | assert(m); |
237 | ||
238 | if (m->from_proc_self_mountinfo) | |
239 | return &m->parameters_proc_self_mountinfo; | |
240 | ||
6b1dc2bd | 241 | return get_mount_parameters_fragment(m); |
cb39ed3f LP |
242 | } |
243 | ||
6e2ef85b | 244 | static int mount_add_mount_links(Mount *m) { |
a57f7e2c | 245 | _cleanup_free_ char *parent = NULL; |
5c78d8e2 | 246 | MountParameters *pm; |
ac155bb8 | 247 | Unit *other; |
a57f7e2c LP |
248 | Iterator i; |
249 | Set *s; | |
b08d03ff LP |
250 | int r; |
251 | ||
6e2ef85b | 252 | assert(m); |
b08d03ff | 253 | |
a57f7e2c LP |
254 | if (!path_equal(m->where, "/")) { |
255 | /* Adds in links to other mount points that might lie further | |
256 | * up in the hierarchy */ | |
5f311f8c LP |
257 | |
258 | parent = dirname_malloc(m->where); | |
259 | if (!parent) | |
260 | return -ENOMEM; | |
01f78473 | 261 | |
a57f7e2c | 262 | r = unit_require_mounts_for(UNIT(m), parent); |
4f0eedb7 | 263 | if (r < 0) |
01f78473 | 264 | return r; |
4f0eedb7 | 265 | } |
01f78473 | 266 | |
a57f7e2c LP |
267 | /* Adds in links to other mount points that might be needed |
268 | * for the source path (if this is a bind mount) to be | |
269 | * available. */ | |
270 | pm = get_mount_parameters_fragment(m); | |
fc676b00 ZJS |
271 | if (pm && pm->what && |
272 | path_is_absolute(pm->what) && | |
273 | !mount_is_network(pm)) { | |
274 | ||
a57f7e2c | 275 | r = unit_require_mounts_for(UNIT(m), pm->what); |
4f0eedb7 | 276 | if (r < 0) |
6e2ef85b | 277 | return r; |
4f0eedb7 | 278 | } |
b08d03ff | 279 | |
a57f7e2c LP |
280 | /* Adds in links to other units that use this path or paths |
281 | * further down in the hierarchy */ | |
282 | s = manager_get_units_requiring_mounts_for(UNIT(m)->manager, m->where); | |
283 | SET_FOREACH(other, s, i) { | |
b08d03ff | 284 | |
a57f7e2c LP |
285 | if (other->load_state != UNIT_LOADED) |
286 | continue; | |
b08d03ff | 287 | |
a57f7e2c LP |
288 | if (other == UNIT(m)) |
289 | continue; | |
b08d03ff | 290 | |
a57f7e2c | 291 | r = unit_add_dependency(other, UNIT_AFTER, UNIT(m), true); |
4f0eedb7 | 292 | if (r < 0) |
6e2ef85b | 293 | return r; |
b08d03ff | 294 | |
a57f7e2c LP |
295 | if (UNIT(m)->fragment_path) { |
296 | /* If we have fragment configuration, then make this dependency required */ | |
297 | r = unit_add_dependency(other, UNIT_REQUIRES, UNIT(m), true); | |
298 | if (r < 0) | |
299 | return r; | |
300 | } | |
7c8fa05c LP |
301 | } |
302 | ||
303 | return 0; | |
304 | } | |
305 | ||
173a8d04 LP |
306 | static int mount_add_device_links(Mount *m) { |
307 | MountParameters *p; | |
5073f89f | 308 | bool device_wants_mount = false; |
9fff8a1f | 309 | int r; |
173a8d04 LP |
310 | |
311 | assert(m); | |
312 | ||
06e97888 | 313 | p = get_mount_parameters(m); |
6b1dc2bd | 314 | if (!p) |
173a8d04 LP |
315 | return 0; |
316 | ||
9fff8a1f | 317 | if (!p->what) |
173a8d04 | 318 | return 0; |
5c78d8e2 | 319 | |
dd144c63 LP |
320 | if (mount_is_bind(p)) |
321 | return 0; | |
322 | ||
323 | if (!is_device_path(p->what)) | |
324 | return 0; | |
325 | ||
7ba2711d LP |
326 | /* /dev/root is a really weird thing, it's not a real device, |
327 | * but just a path the kernel exports for the root file system | |
328 | * specified on the kernel command line. Ignore it here. */ | |
329 | if (path_equal(p->what, "/dev/root")) | |
330 | return 0; | |
331 | ||
dd144c63 LP |
332 | if (path_equal(m->where, "/")) |
333 | return 0; | |
334 | ||
b2c23da8 | 335 | if (mount_is_auto(p) && UNIT(m)->manager->running_as == MANAGER_SYSTEM) |
5073f89f TG |
336 | device_wants_mount = true; |
337 | ||
9d06297e | 338 | r = unit_add_node_link(UNIT(m), p->what, device_wants_mount, m->from_fragment ? UNIT_BINDS_TO : UNIT_REQUIRES); |
dd144c63 LP |
339 | if (r < 0) |
340 | return r; | |
9fff8a1f | 341 | |
9fff8a1f | 342 | return 0; |
173a8d04 LP |
343 | } |
344 | ||
6b1dc2bd LP |
345 | static int mount_add_quota_links(Mount *m) { |
346 | int r; | |
347 | MountParameters *p; | |
348 | ||
349 | assert(m); | |
350 | ||
b2c23da8 | 351 | if (UNIT(m)->manager->running_as != MANAGER_SYSTEM) |
6b1dc2bd LP |
352 | return 0; |
353 | ||
354 | p = get_mount_parameters_fragment(m); | |
355 | if (!p) | |
356 | return 0; | |
357 | ||
358 | if (!needs_quota(p)) | |
359 | return 0; | |
360 | ||
361 | r = unit_add_two_dependencies_by_name(UNIT(m), UNIT_BEFORE, UNIT_WANTS, SPECIAL_QUOTACHECK_SERVICE, NULL, true); | |
362 | if (r < 0) | |
363 | return r; | |
364 | ||
365 | r = unit_add_two_dependencies_by_name(UNIT(m), UNIT_BEFORE, UNIT_WANTS, SPECIAL_QUOTAON_SERVICE, NULL, true); | |
366 | if (r < 0) | |
367 | return r; | |
368 | ||
369 | return 0; | |
370 | } | |
371 | ||
88ac30a1 TG |
372 | static bool should_umount(Mount *m) { |
373 | MountParameters *p; | |
374 | ||
375 | if (path_equal(m->where, "/") || | |
376 | path_equal(m->where, "/usr")) | |
377 | return false; | |
378 | ||
379 | p = get_mount_parameters(m); | |
d15d0333 | 380 | if (p && fstab_test_option(p->options, "x-initrd.mount\0") && |
88ac30a1 TG |
381 | !in_initrd()) |
382 | return false; | |
383 | ||
384 | return true; | |
385 | } | |
386 | ||
2edd4434 | 387 | static int mount_add_default_dependencies(Mount *m) { |
9ddc4a26 | 388 | MountParameters *p; |
ea0ec5ce | 389 | const char *after; |
0c17fbce | 390 | int r; |
2edd4434 LP |
391 | |
392 | assert(m); | |
393 | ||
4c9ea260 LP |
394 | if (!UNIT(m)->default_dependencies) |
395 | return 0; | |
396 | ||
b2c23da8 | 397 | if (UNIT(m)->manager->running_as != MANAGER_SYSTEM) |
9ddc4a26 | 398 | return 0; |
cb39ed3f | 399 | |
874d3404 LP |
400 | /* We do not add any default dependencies to / and /usr, since |
401 | * they are guaranteed to stay mounted the whole time, since | |
402 | * our system is on it. Also, don't bother with anything | |
403 | * mounted below virtual file systems, it's also going to be | |
404 | * virtual, and hence not worth the effort. */ | |
405 | if (path_equal(m->where, "/") || | |
406 | path_equal(m->where, "/usr") || | |
407 | path_startswith(m->where, "/proc") || | |
408 | path_startswith(m->where, "/sys") || | |
409 | path_startswith(m->where, "/dev")) | |
6b1dc2bd | 410 | return 0; |
2edd4434 | 411 | |
874d3404 LP |
412 | p = get_mount_parameters(m); |
413 | if (!p) | |
6b1dc2bd LP |
414 | return 0; |
415 | ||
e8d2f6cd | 416 | if (mount_is_network(p)) { |
ea0ec5ce LP |
417 | /* We order ourselves after network.target. This is |
418 | * primarily useful at shutdown: services that take | |
419 | * down the network should order themselves before | |
420 | * network.target, so that they are shut down only | |
421 | * after this mount unit is stopped. */ | |
6b1dc2bd | 422 | |
ea0ec5ce | 423 | r = unit_add_dependency_by_name(UNIT(m), UNIT_AFTER, SPECIAL_NETWORK_TARGET, NULL, true); |
a63a5c46 LP |
424 | if (r < 0) |
425 | return r; | |
a63a5c46 | 426 | |
ea0ec5ce LP |
427 | /* We pull in network-online.target, and order |
428 | * ourselves after it. This is useful at start-up to | |
429 | * actively pull in tools that want to be started | |
430 | * before we start mounting network file systems, and | |
431 | * whose purpose it is to delay this until the network | |
432 | * is "up". */ | |
433 | ||
434 | r = unit_add_two_dependencies_by_name(UNIT(m), UNIT_WANTS, UNIT_AFTER, SPECIAL_NETWORK_ONLINE_TARGET, NULL, true); | |
e8d2f6cd LP |
435 | if (r < 0) |
436 | return r; | |
ea0ec5ce LP |
437 | |
438 | after = SPECIAL_REMOTE_FS_PRE_TARGET; | |
439 | } else | |
440 | after = SPECIAL_LOCAL_FS_PRE_TARGET; | |
441 | ||
442 | r = unit_add_dependency_by_name(UNIT(m), UNIT_AFTER, after, NULL, true); | |
443 | if (r < 0) | |
444 | return r; | |
e8d2f6cd | 445 | |
88ac30a1 TG |
446 | if (should_umount(m)) { |
447 | r = unit_add_two_dependencies_by_name(UNIT(m), UNIT_BEFORE, UNIT_CONFLICTS, SPECIAL_UMOUNT_TARGET, NULL, true); | |
448 | if (r < 0) | |
449 | return r; | |
450 | } | |
2edd4434 LP |
451 | |
452 | return 0; | |
453 | } | |
454 | ||
8d567588 | 455 | static int mount_verify(Mount *m) { |
a57f7e2c | 456 | _cleanup_free_ char *e = NULL; |
7410616c | 457 | int r; |
a57f7e2c | 458 | |
8d567588 LP |
459 | assert(m); |
460 | ||
1124fe6f | 461 | if (UNIT(m)->load_state != UNIT_LOADED) |
8d567588 LP |
462 | return 0; |
463 | ||
6b1dc2bd | 464 | if (!m->from_fragment && !m->from_proc_self_mountinfo) |
8cbef760 LP |
465 | return -ENOENT; |
466 | ||
7410616c LP |
467 | r = unit_name_from_path(m->where, ".mount", &e); |
468 | if (r < 0) | |
f2341e0a | 469 | return log_unit_error_errno(UNIT(m), r, "Failed to generate unit name from mount path: %m"); |
8d567588 | 470 | |
7410616c | 471 | if (!unit_has_name(UNIT(m), e)) { |
f2341e0a | 472 | log_unit_error(UNIT(m), "Where= setting doesn't match unit name. Refusing."); |
8d567588 LP |
473 | return -EINVAL; |
474 | } | |
475 | ||
33ff02c9 | 476 | if (mount_point_is_api(m->where) || mount_point_ignore(m->where)) { |
f2341e0a | 477 | log_unit_error(UNIT(m), "Cannot create mount unit for API file system %s. Refusing.", m->where); |
33ff02c9 LP |
478 | return -EINVAL; |
479 | } | |
480 | ||
1124fe6f | 481 | if (UNIT(m)->fragment_path && !m->parameters_fragment.what) { |
f2341e0a | 482 | log_unit_error(UNIT(m), "What= setting is missing. Refusing."); |
4e85aff4 LP |
483 | return -EBADMSG; |
484 | } | |
485 | ||
4819ff03 | 486 | if (m->exec_context.pam_name && m->kill_context.kill_mode != KILL_CONTROL_GROUP) { |
f2341e0a | 487 | log_unit_error(UNIT(m), "Unit has PAM enabled. Kill mode must be set to control-group'. Refusing."); |
4d0e5dbd LP |
488 | return -EINVAL; |
489 | } | |
490 | ||
8d567588 LP |
491 | return 0; |
492 | } | |
493 | ||
1a4ac875 MS |
494 | static int mount_add_extras(Mount *m) { |
495 | Unit *u = UNIT(m); | |
e537352b LP |
496 | int r; |
497 | ||
e821075a LP |
498 | assert(m); |
499 | ||
500 | if (u->fragment_path) | |
1a4ac875 | 501 | m->from_fragment = true; |
e537352b | 502 | |
1a4ac875 | 503 | if (!m->where) { |
7410616c LP |
504 | r = unit_name_to_path(u->id, &m->where); |
505 | if (r < 0) | |
506 | return r; | |
1a4ac875 | 507 | } |
a16e1123 | 508 | |
1a4ac875 | 509 | path_kill_slashes(m->where); |
e537352b | 510 | |
e821075a | 511 | if (!u->description) { |
1a4ac875 MS |
512 | r = unit_set_description(u, m->where); |
513 | if (r < 0) | |
173a8d04 | 514 | return r; |
1a4ac875 | 515 | } |
6e2ef85b | 516 | |
1a4ac875 MS |
517 | r = mount_add_device_links(m); |
518 | if (r < 0) | |
519 | return r; | |
6e2ef85b | 520 | |
1a4ac875 MS |
521 | r = mount_add_mount_links(m); |
522 | if (r < 0) | |
523 | return r; | |
6e2ef85b | 524 | |
1a4ac875 MS |
525 | r = mount_add_quota_links(m); |
526 | if (r < 0) | |
527 | return r; | |
e537352b | 528 | |
598459ce LP |
529 | r = unit_patch_contexts(u); |
530 | if (r < 0) | |
531 | return r; | |
4e67ddd6 | 532 | |
598459ce | 533 | r = unit_add_exec_dependencies(u, &m->exec_context); |
a016b922 LP |
534 | if (r < 0) |
535 | return r; | |
536 | ||
d79200e2 | 537 | r = unit_set_default_slice(u); |
1a4ac875 MS |
538 | if (r < 0) |
539 | return r; | |
540 | ||
4c9ea260 LP |
541 | r = mount_add_default_dependencies(m); |
542 | if (r < 0) | |
543 | return r; | |
598459ce | 544 | |
1a4ac875 MS |
545 | return 0; |
546 | } | |
547 | ||
548 | static int mount_load(Unit *u) { | |
549 | Mount *m = MOUNT(u); | |
550 | int r; | |
551 | ||
552 | assert(u); | |
553 | assert(u->load_state == UNIT_STUB); | |
554 | ||
8eba616f MS |
555 | if (m->from_proc_self_mountinfo) |
556 | r = unit_load_fragment_and_dropin_optional(u); | |
557 | else | |
558 | r = unit_load_fragment_and_dropin(u); | |
559 | ||
1a4ac875 MS |
560 | if (r < 0) |
561 | return r; | |
155da457 | 562 | |
1a4ac875 MS |
563 | /* This is a new unit? Then let's add in some extras */ |
564 | if (u->load_state == UNIT_LOADED) { | |
565 | r = mount_add_extras(m); | |
566 | if (r < 0) | |
567 | return r; | |
e537352b LP |
568 | } |
569 | ||
8d567588 | 570 | return mount_verify(m); |
e537352b LP |
571 | } |
572 | ||
deb0a77c | 573 | static int mount_notify_automount(Mount *m, MountState old_state, MountState state) { |
a16e1123 LP |
574 | Unit *p; |
575 | int r; | |
57020a3a | 576 | Iterator i; |
a16e1123 LP |
577 | |
578 | assert(m); | |
579 | ||
1124fe6f | 580 | SET_FOREACH(p, UNIT(m)->dependencies[UNIT_TRIGGERED_BY], i) |
ac155bb8 | 581 | if (p->type == UNIT_AUTOMOUNT) { |
deb0a77c | 582 | r = automount_update_mount(AUTOMOUNT(p), old_state, state); |
57020a3a LP |
583 | if (r < 0) |
584 | return r; | |
585 | } | |
a16e1123 | 586 | |
57020a3a | 587 | return 0; |
a16e1123 LP |
588 | } |
589 | ||
e537352b LP |
590 | static void mount_set_state(Mount *m, MountState state) { |
591 | MountState old_state; | |
592 | assert(m); | |
593 | ||
594 | old_state = m->state; | |
595 | m->state = state; | |
596 | ||
597 | if (state != MOUNT_MOUNTING && | |
598 | state != MOUNT_MOUNTING_DONE && | |
599 | state != MOUNT_REMOUNTING && | |
600 | state != MOUNT_UNMOUNTING && | |
601 | state != MOUNT_MOUNTING_SIGTERM && | |
602 | state != MOUNT_MOUNTING_SIGKILL && | |
603 | state != MOUNT_UNMOUNTING_SIGTERM && | |
604 | state != MOUNT_UNMOUNTING_SIGKILL && | |
605 | state != MOUNT_REMOUNTING_SIGTERM && | |
606 | state != MOUNT_REMOUNTING_SIGKILL) { | |
718db961 | 607 | m->timer_event_source = sd_event_source_unref(m->timer_event_source); |
a16e1123 | 608 | mount_unwatch_control_pid(m); |
e537352b | 609 | m->control_command = NULL; |
a16e1123 | 610 | m->control_command_id = _MOUNT_EXEC_COMMAND_INVALID; |
e537352b LP |
611 | } |
612 | ||
deb0a77c | 613 | mount_notify_automount(m, old_state, state); |
8d567588 | 614 | |
e537352b | 615 | if (state != old_state) |
f2341e0a | 616 | log_unit_debug(UNIT(m), "Changed %s -> %s", mount_state_to_string(old_state), mount_state_to_string(state)); |
e537352b | 617 | |
9d2f5178 LP |
618 | unit_notify(UNIT(m), state_translation_table[old_state], state_translation_table[state], m->reload_result == MOUNT_SUCCESS); |
619 | m->reload_result = MOUNT_SUCCESS; | |
e537352b LP |
620 | } |
621 | ||
be847e82 | 622 | static int mount_coldplug(Unit *u) { |
e537352b | 623 | Mount *m = MOUNT(u); |
a16e1123 LP |
624 | MountState new_state = MOUNT_DEAD; |
625 | int r; | |
e537352b LP |
626 | |
627 | assert(m); | |
628 | assert(m->state == MOUNT_DEAD); | |
629 | ||
a16e1123 LP |
630 | if (m->deserialized_state != m->state) |
631 | new_state = m->deserialized_state; | |
632 | else if (m->from_proc_self_mountinfo) | |
633 | new_state = MOUNT_MOUNTED; | |
e537352b | 634 | |
5bcb0f2b LP |
635 | if (new_state == m->state) |
636 | return 0; | |
e537352b | 637 | |
c386f588 LP |
638 | if (m->control_pid > 0 && |
639 | pid_is_unwaited(m->control_pid) && | |
640 | IN_SET(new_state, | |
641 | MOUNT_MOUNTING, | |
642 | MOUNT_MOUNTING_DONE, | |
643 | MOUNT_REMOUNTING, | |
644 | MOUNT_UNMOUNTING, | |
645 | MOUNT_MOUNTING_SIGTERM, | |
646 | MOUNT_MOUNTING_SIGKILL, | |
647 | MOUNT_UNMOUNTING_SIGTERM, | |
648 | MOUNT_UNMOUNTING_SIGKILL, | |
649 | MOUNT_REMOUNTING_SIGTERM, | |
650 | MOUNT_REMOUNTING_SIGKILL)) { | |
5bcb0f2b LP |
651 | |
652 | r = unit_watch_pid(UNIT(m), m->control_pid); | |
653 | if (r < 0) | |
654 | return r; | |
e537352b | 655 | |
5bcb0f2b LP |
656 | r = mount_arm_timer(m); |
657 | if (r < 0) | |
658 | return r; | |
a16e1123 | 659 | } |
e537352b | 660 | |
5bcb0f2b | 661 | mount_set_state(m, new_state); |
e537352b | 662 | return 0; |
e537352b LP |
663 | } |
664 | ||
665 | static void mount_dump(Unit *u, FILE *f, const char *prefix) { | |
666 | Mount *m = MOUNT(u); | |
667 | MountParameters *p; | |
668 | ||
669 | assert(m); | |
670 | assert(f); | |
671 | ||
cb39ed3f | 672 | p = get_mount_parameters(m); |
e537352b LP |
673 | |
674 | fprintf(f, | |
675 | "%sMount State: %s\n" | |
81a5c6d0 | 676 | "%sResult: %s\n" |
e537352b LP |
677 | "%sWhere: %s\n" |
678 | "%sWhat: %s\n" | |
679 | "%sFile System Type: %s\n" | |
680 | "%sOptions: %s\n" | |
e537352b LP |
681 | "%sFrom /proc/self/mountinfo: %s\n" |
682 | "%sFrom fragment: %s\n" | |
2a2e1b36 | 683 | "%sDirectoryMode: %04o\n", |
a16e1123 | 684 | prefix, mount_state_to_string(m->state), |
81a5c6d0 | 685 | prefix, mount_result_to_string(m->result), |
e537352b | 686 | prefix, m->where, |
1e4fc9b1 HH |
687 | prefix, p ? strna(p->what) : "n/a", |
688 | prefix, p ? strna(p->fstype) : "n/a", | |
689 | prefix, p ? strna(p->options) : "n/a", | |
e537352b LP |
690 | prefix, yes_no(m->from_proc_self_mountinfo), |
691 | prefix, yes_no(m->from_fragment), | |
2a2e1b36 | 692 | prefix, m->directory_mode); |
e537352b LP |
693 | |
694 | if (m->control_pid > 0) | |
695 | fprintf(f, | |
ccd06097 ZJS |
696 | "%sControl PID: "PID_FMT"\n", |
697 | prefix, m->control_pid); | |
e537352b LP |
698 | |
699 | exec_context_dump(&m->exec_context, f, prefix); | |
4819ff03 | 700 | kill_context_dump(&m->kill_context, f, prefix); |
e537352b LP |
701 | } |
702 | ||
a16e1123 LP |
703 | static int mount_spawn(Mount *m, ExecCommand *c, pid_t *_pid) { |
704 | pid_t pid; | |
705 | int r; | |
9fa95f85 DM |
706 | ExecParameters exec_params = { |
707 | .apply_permissions = true, | |
708 | .apply_chroot = true, | |
709 | .apply_tty_stdin = true, | |
6f856a09 | 710 | .bus_endpoint_fd = -1, |
a34ceba6 LP |
711 | .stdin_fd = -1, |
712 | .stdout_fd = -1, | |
713 | .stderr_fd = -1, | |
9fa95f85 | 714 | }; |
a16e1123 LP |
715 | |
716 | assert(m); | |
717 | assert(c); | |
718 | assert(_pid); | |
719 | ||
5ad096b3 LP |
720 | (void) unit_realize_cgroup(UNIT(m)); |
721 | if (m->reset_cpu_usage) { | |
722 | (void) unit_reset_cpu_usage(UNIT(m)); | |
723 | m->reset_cpu_usage = false; | |
724 | } | |
4ad49000 | 725 | |
613b411c LP |
726 | r = unit_setup_exec_runtime(UNIT(m)); |
727 | if (r < 0) | |
728 | goto fail; | |
729 | ||
718db961 | 730 | r = mount_arm_timer(m); |
36697dc0 | 731 | if (r < 0) |
a16e1123 LP |
732 | goto fail; |
733 | ||
9fa95f85 DM |
734 | exec_params.environment = UNIT(m)->manager->environment; |
735 | exec_params.confirm_spawn = UNIT(m)->manager->confirm_spawn; | |
736 | exec_params.cgroup_supported = UNIT(m)->manager->cgroup_supported; | |
737 | exec_params.cgroup_path = UNIT(m)->cgroup_path; | |
a931ad47 | 738 | exec_params.cgroup_delegate = m->cgroup_context.delegate; |
9fa95f85 | 739 | exec_params.runtime_prefix = manager_get_runtime_prefix(UNIT(m)->manager); |
9fa95f85 | 740 | |
f2341e0a LP |
741 | r = exec_spawn(UNIT(m), |
742 | c, | |
4ad49000 | 743 | &m->exec_context, |
9fa95f85 | 744 | &exec_params, |
613b411c | 745 | m->exec_runtime, |
4ad49000 LP |
746 | &pid); |
747 | if (r < 0) | |
a16e1123 LP |
748 | goto fail; |
749 | ||
4ad49000 LP |
750 | r = unit_watch_pid(UNIT(m), pid); |
751 | if (r < 0) | |
a16e1123 LP |
752 | /* FIXME: we need to do something here */ |
753 | goto fail; | |
754 | ||
755 | *_pid = pid; | |
756 | ||
757 | return 0; | |
758 | ||
759 | fail: | |
718db961 | 760 | m->timer_event_source = sd_event_source_unref(m->timer_event_source); |
a16e1123 LP |
761 | |
762 | return r; | |
763 | } | |
764 | ||
9d2f5178 | 765 | static void mount_enter_dead(Mount *m, MountResult f) { |
e537352b LP |
766 | assert(m); |
767 | ||
9d2f5178 LP |
768 | if (f != MOUNT_SUCCESS) |
769 | m->result = f; | |
e537352b | 770 | |
613b411c LP |
771 | exec_runtime_destroy(m->exec_runtime); |
772 | m->exec_runtime = exec_runtime_unref(m->exec_runtime); | |
773 | ||
e66cf1a3 LP |
774 | exec_context_destroy_runtime_directory(&m->exec_context, manager_get_runtime_prefix(UNIT(m)->manager)); |
775 | ||
9d2f5178 | 776 | mount_set_state(m, m->result != MOUNT_SUCCESS ? MOUNT_FAILED : MOUNT_DEAD); |
e537352b LP |
777 | } |
778 | ||
9d2f5178 | 779 | static void mount_enter_mounted(Mount *m, MountResult f) { |
80876c20 LP |
780 | assert(m); |
781 | ||
9d2f5178 LP |
782 | if (f != MOUNT_SUCCESS) |
783 | m->result = f; | |
80876c20 LP |
784 | |
785 | mount_set_state(m, MOUNT_MOUNTED); | |
786 | } | |
787 | ||
9d2f5178 | 788 | static void mount_enter_signal(Mount *m, MountState state, MountResult f) { |
e537352b LP |
789 | int r; |
790 | ||
791 | assert(m); | |
792 | ||
9d2f5178 LP |
793 | if (f != MOUNT_SUCCESS) |
794 | m->result = f; | |
e537352b | 795 | |
cd2086fe LP |
796 | r = unit_kill_context( |
797 | UNIT(m), | |
798 | &m->kill_context, | |
db2cb23b UTL |
799 | (state != MOUNT_MOUNTING_SIGTERM && state != MOUNT_UNMOUNTING_SIGTERM && state != MOUNT_REMOUNTING_SIGTERM) ? |
800 | KILL_KILL : KILL_TERMINATE, | |
cd2086fe LP |
801 | -1, |
802 | m->control_pid, | |
803 | false); | |
804 | if (r < 0) | |
805 | goto fail; | |
e537352b | 806 | |
cd2086fe | 807 | if (r > 0) { |
718db961 | 808 | r = mount_arm_timer(m); |
36697dc0 | 809 | if (r < 0) |
80876c20 | 810 | goto fail; |
e537352b | 811 | |
80876c20 | 812 | mount_set_state(m, state); |
ac84d1fb LP |
813 | } else if (state == MOUNT_REMOUNTING_SIGTERM) |
814 | mount_enter_signal(m, MOUNT_REMOUNTING_SIGKILL, MOUNT_SUCCESS); | |
815 | else if (state == MOUNT_REMOUNTING_SIGKILL) | |
9d2f5178 | 816 | mount_enter_mounted(m, MOUNT_SUCCESS); |
ac84d1fb LP |
817 | else if (state == MOUNT_MOUNTING_SIGTERM) |
818 | mount_enter_signal(m, MOUNT_MOUNTING_SIGKILL, MOUNT_SUCCESS); | |
819 | else if (state == MOUNT_UNMOUNTING_SIGTERM) | |
820 | mount_enter_signal(m, MOUNT_UNMOUNTING_SIGKILL, MOUNT_SUCCESS); | |
80876c20 | 821 | else |
9d2f5178 | 822 | mount_enter_dead(m, MOUNT_SUCCESS); |
e537352b LP |
823 | |
824 | return; | |
825 | ||
826 | fail: | |
f2341e0a | 827 | log_unit_warning_errno(UNIT(m), r, "Failed to kill processes: %m"); |
e537352b | 828 | |
80876c20 | 829 | if (state == MOUNT_REMOUNTING_SIGTERM || state == MOUNT_REMOUNTING_SIGKILL) |
9d2f5178 | 830 | mount_enter_mounted(m, MOUNT_FAILURE_RESOURCES); |
80876c20 | 831 | else |
9d2f5178 | 832 | mount_enter_dead(m, MOUNT_FAILURE_RESOURCES); |
5261ba90 TT |
833 | } |
834 | ||
9d2f5178 | 835 | static void mount_enter_unmounting(Mount *m) { |
e537352b LP |
836 | int r; |
837 | ||
838 | assert(m); | |
839 | ||
7d54a03a LP |
840 | /* Start counting our attempts */ |
841 | if (!IN_SET(m->state, | |
842 | MOUNT_UNMOUNTING, | |
843 | MOUNT_UNMOUNTING_SIGTERM, | |
844 | MOUNT_UNMOUNTING_SIGKILL)) | |
845 | m->n_retry_umount = 0; | |
846 | ||
a16e1123 LP |
847 | m->control_command_id = MOUNT_EXEC_UNMOUNT; |
848 | m->control_command = m->exec_command + MOUNT_EXEC_UNMOUNT; | |
e537352b | 849 | |
f00929ad | 850 | r = exec_command_set(m->control_command, UMOUNT_PATH, m->where, NULL); |
7d54a03a | 851 | if (r < 0) |
e537352b LP |
852 | goto fail; |
853 | ||
a16e1123 | 854 | mount_unwatch_control_pid(m); |
5e94833f | 855 | |
7d54a03a LP |
856 | r = mount_spawn(m, m->control_command, &m->control_pid); |
857 | if (r < 0) | |
e537352b LP |
858 | goto fail; |
859 | ||
860 | mount_set_state(m, MOUNT_UNMOUNTING); | |
861 | ||
862 | return; | |
863 | ||
864 | fail: | |
f2341e0a | 865 | log_unit_warning_errno(UNIT(m), r, "Failed to run 'umount' task: %m"); |
9d2f5178 | 866 | mount_enter_mounted(m, MOUNT_FAILURE_RESOURCES); |
e537352b LP |
867 | } |
868 | ||
2a2e1b36 LP |
869 | static int mount_get_opts(Mount *m, char **ret) { |
870 | return fstab_filter_options(m->parameters_fragment.options, | |
871 | "nofail\0" "noauto\0" "auto\0", NULL, NULL, ret); | |
46a01aba SW |
872 | } |
873 | ||
8d567588 | 874 | static void mount_enter_mounting(Mount *m) { |
e537352b | 875 | int r; |
cb39ed3f | 876 | MountParameters *p; |
e537352b LP |
877 | |
878 | assert(m); | |
879 | ||
a16e1123 LP |
880 | m->control_command_id = MOUNT_EXEC_MOUNT; |
881 | m->control_command = m->exec_command + MOUNT_EXEC_MOUNT; | |
e537352b | 882 | |
f2341e0a LP |
883 | r = unit_fail_if_symlink(UNIT(m), m->where); |
884 | if (r < 0) | |
885 | goto fail; | |
886 | ||
887 | (void) mkdir_p_label(m->where, m->directory_mode); | |
3e5235b0 | 888 | |
f2341e0a | 889 | unit_warn_if_dir_nonempty(UNIT(m), m->where); |
257f1d8e | 890 | |
cb39ed3f | 891 | /* Create the source directory for bind-mounts if needed */ |
6b1dc2bd | 892 | p = get_mount_parameters_fragment(m); |
cb39ed3f | 893 | if (p && mount_is_bind(p)) |
f2341e0a | 894 | (void) mkdir_p_label(p->what, m->directory_mode); |
5261ba90 | 895 | |
e86b3761 | 896 | if (m->from_fragment) { |
17a1c597 ZJS |
897 | _cleanup_free_ char *opts = NULL; |
898 | ||
46a01aba | 899 | r = mount_get_opts(m, &opts); |
17a1c597 ZJS |
900 | if (r < 0) |
901 | goto fail; | |
902 | ||
f00929ad | 903 | r = exec_command_set(m->control_command, MOUNT_PATH, |
e86b3761 | 904 | m->parameters_fragment.what, m->where, NULL); |
e86b3761 ZJS |
905 | if (r >= 0 && m->sloppy_options) |
906 | r = exec_command_append(m->control_command, "-s", NULL); | |
907 | if (r >= 0 && m->parameters_fragment.fstype) | |
908 | r = exec_command_append(m->control_command, "-t", m->parameters_fragment.fstype, NULL); | |
0c47569a | 909 | if (r >= 0 && !isempty(opts)) |
17a1c597 | 910 | r = exec_command_append(m->control_command, "-o", opts, NULL); |
e86b3761 | 911 | } else |
e537352b LP |
912 | r = -ENOENT; |
913 | ||
914 | if (r < 0) | |
915 | goto fail; | |
916 | ||
a16e1123 | 917 | mount_unwatch_control_pid(m); |
5e94833f | 918 | |
257f1d8e LP |
919 | r = mount_spawn(m, m->control_command, &m->control_pid); |
920 | if (r < 0) | |
e537352b LP |
921 | goto fail; |
922 | ||
923 | mount_set_state(m, MOUNT_MOUNTING); | |
924 | ||
925 | return; | |
926 | ||
927 | fail: | |
f2341e0a | 928 | log_unit_warning_errno(UNIT(m), r, "Failed to run 'mount' task: %m"); |
9d2f5178 | 929 | mount_enter_dead(m, MOUNT_FAILURE_RESOURCES); |
e537352b LP |
930 | } |
931 | ||
9d2f5178 | 932 | static void mount_enter_remounting(Mount *m) { |
e537352b LP |
933 | int r; |
934 | ||
935 | assert(m); | |
936 | ||
a16e1123 LP |
937 | m->control_command_id = MOUNT_EXEC_REMOUNT; |
938 | m->control_command = m->exec_command + MOUNT_EXEC_REMOUNT; | |
e537352b LP |
939 | |
940 | if (m->from_fragment) { | |
e537352b LP |
941 | const char *o; |
942 | ||
718db961 | 943 | if (m->parameters_fragment.options) |
63c372cb | 944 | o = strjoina("remount,", m->parameters_fragment.options); |
718db961 | 945 | else |
e537352b LP |
946 | o = "remount"; |
947 | ||
f00929ad | 948 | r = exec_command_set(m->control_command, MOUNT_PATH, |
e86b3761 ZJS |
949 | m->parameters_fragment.what, m->where, |
950 | "-o", o, NULL); | |
e86b3761 ZJS |
951 | if (r >= 0 && m->sloppy_options) |
952 | r = exec_command_append(m->control_command, "-s", NULL); | |
953 | if (r >= 0 && m->parameters_fragment.fstype) | |
954 | r = exec_command_append(m->control_command, "-t", m->parameters_fragment.fstype, NULL); | |
6b1dc2bd | 955 | } else |
e537352b LP |
956 | r = -ENOENT; |
957 | ||
60b912f6 | 958 | if (r < 0) |
e537352b | 959 | goto fail; |
e537352b | 960 | |
a16e1123 | 961 | mount_unwatch_control_pid(m); |
5e94833f | 962 | |
718db961 LP |
963 | r = mount_spawn(m, m->control_command, &m->control_pid); |
964 | if (r < 0) | |
e537352b LP |
965 | goto fail; |
966 | ||
967 | mount_set_state(m, MOUNT_REMOUNTING); | |
968 | ||
969 | return; | |
970 | ||
971 | fail: | |
f2341e0a | 972 | log_unit_warning_errno(UNIT(m), r, "Failed to run 'remount' task: %m"); |
9d2f5178 LP |
973 | m->reload_result = MOUNT_FAILURE_RESOURCES; |
974 | mount_enter_mounted(m, MOUNT_SUCCESS); | |
e537352b LP |
975 | } |
976 | ||
977 | static int mount_start(Unit *u) { | |
978 | Mount *m = MOUNT(u); | |
979 | ||
980 | assert(m); | |
981 | ||
982 | /* We cannot fulfill this request right now, try again later | |
983 | * please! */ | |
984 | if (m->state == MOUNT_UNMOUNTING || | |
985 | m->state == MOUNT_UNMOUNTING_SIGTERM || | |
60b912f6 LP |
986 | m->state == MOUNT_UNMOUNTING_SIGKILL || |
987 | m->state == MOUNT_MOUNTING_SIGTERM || | |
988 | m->state == MOUNT_MOUNTING_SIGKILL) | |
e537352b LP |
989 | return -EAGAIN; |
990 | ||
991 | /* Already on it! */ | |
60b912f6 | 992 | if (m->state == MOUNT_MOUNTING) |
e537352b LP |
993 | return 0; |
994 | ||
fdf20a31 | 995 | assert(m->state == MOUNT_DEAD || m->state == MOUNT_FAILED); |
e537352b | 996 | |
9d2f5178 LP |
997 | m->result = MOUNT_SUCCESS; |
998 | m->reload_result = MOUNT_SUCCESS; | |
5ad096b3 | 999 | m->reset_cpu_usage = true; |
9d2f5178 | 1000 | |
8d567588 | 1001 | mount_enter_mounting(m); |
82a2b6bb | 1002 | return 1; |
e537352b LP |
1003 | } |
1004 | ||
1005 | static int mount_stop(Unit *u) { | |
1006 | Mount *m = MOUNT(u); | |
1007 | ||
1008 | assert(m); | |
1009 | ||
e537352b LP |
1010 | /* Already on it */ |
1011 | if (m->state == MOUNT_UNMOUNTING || | |
1012 | m->state == MOUNT_UNMOUNTING_SIGKILL || | |
60b912f6 LP |
1013 | m->state == MOUNT_UNMOUNTING_SIGTERM || |
1014 | m->state == MOUNT_MOUNTING_SIGTERM || | |
1015 | m->state == MOUNT_MOUNTING_SIGKILL) | |
e537352b LP |
1016 | return 0; |
1017 | ||
3f6c78dc LP |
1018 | assert(m->state == MOUNT_MOUNTING || |
1019 | m->state == MOUNT_MOUNTING_DONE || | |
1020 | m->state == MOUNT_MOUNTED || | |
3f6c78dc LP |
1021 | m->state == MOUNT_REMOUNTING || |
1022 | m->state == MOUNT_REMOUNTING_SIGTERM || | |
1023 | m->state == MOUNT_REMOUNTING_SIGKILL); | |
e537352b | 1024 | |
9d2f5178 | 1025 | mount_enter_unmounting(m); |
82a2b6bb | 1026 | return 1; |
e537352b LP |
1027 | } |
1028 | ||
1029 | static int mount_reload(Unit *u) { | |
1030 | Mount *m = MOUNT(u); | |
1031 | ||
1032 | assert(m); | |
1033 | ||
1034 | if (m->state == MOUNT_MOUNTING_DONE) | |
1035 | return -EAGAIN; | |
1036 | ||
1037 | assert(m->state == MOUNT_MOUNTED); | |
1038 | ||
9d2f5178 | 1039 | mount_enter_remounting(m); |
2d018ae2 | 1040 | return 1; |
e537352b LP |
1041 | } |
1042 | ||
a16e1123 LP |
1043 | static int mount_serialize(Unit *u, FILE *f, FDSet *fds) { |
1044 | Mount *m = MOUNT(u); | |
1045 | ||
1046 | assert(m); | |
1047 | assert(f); | |
1048 | assert(fds); | |
1049 | ||
1050 | unit_serialize_item(u, f, "state", mount_state_to_string(m->state)); | |
9d2f5178 LP |
1051 | unit_serialize_item(u, f, "result", mount_result_to_string(m->result)); |
1052 | unit_serialize_item(u, f, "reload-result", mount_result_to_string(m->reload_result)); | |
a16e1123 LP |
1053 | |
1054 | if (m->control_pid > 0) | |
ccd06097 | 1055 | unit_serialize_item_format(u, f, "control-pid", PID_FMT, m->control_pid); |
a16e1123 LP |
1056 | |
1057 | if (m->control_command_id >= 0) | |
1058 | unit_serialize_item(u, f, "control-command", mount_exec_command_to_string(m->control_command_id)); | |
1059 | ||
1060 | return 0; | |
1061 | } | |
1062 | ||
1063 | static int mount_deserialize_item(Unit *u, const char *key, const char *value, FDSet *fds) { | |
1064 | Mount *m = MOUNT(u); | |
a16e1123 LP |
1065 | |
1066 | assert(u); | |
1067 | assert(key); | |
1068 | assert(value); | |
1069 | assert(fds); | |
1070 | ||
1071 | if (streq(key, "state")) { | |
1072 | MountState state; | |
1073 | ||
1074 | if ((state = mount_state_from_string(value)) < 0) | |
f2341e0a | 1075 | log_unit_debug(u, "Failed to parse state value: %s", value); |
a16e1123 LP |
1076 | else |
1077 | m->deserialized_state = state; | |
9d2f5178 LP |
1078 | } else if (streq(key, "result")) { |
1079 | MountResult f; | |
a16e1123 | 1080 | |
9d2f5178 LP |
1081 | f = mount_result_from_string(value); |
1082 | if (f < 0) | |
f2341e0a | 1083 | log_unit_debug(u, "Failed to parse result value: %s", value); |
9d2f5178 LP |
1084 | else if (f != MOUNT_SUCCESS) |
1085 | m->result = f; | |
1086 | ||
1087 | } else if (streq(key, "reload-result")) { | |
1088 | MountResult f; | |
1089 | ||
1090 | f = mount_result_from_string(value); | |
1091 | if (f < 0) | |
f2341e0a | 1092 | log_unit_debug(u, "Failed to parse reload result value: %s", value); |
9d2f5178 LP |
1093 | else if (f != MOUNT_SUCCESS) |
1094 | m->reload_result = f; | |
a16e1123 LP |
1095 | |
1096 | } else if (streq(key, "control-pid")) { | |
5925dd3c | 1097 | pid_t pid; |
a16e1123 | 1098 | |
e364ad06 | 1099 | if (parse_pid(value, &pid) < 0) |
f2341e0a | 1100 | log_unit_debug(u, "Failed to parse control-pid value: %s", value); |
a16e1123 | 1101 | else |
5925dd3c | 1102 | m->control_pid = pid; |
a16e1123 LP |
1103 | } else if (streq(key, "control-command")) { |
1104 | MountExecCommand id; | |
1105 | ||
f2341e0a LP |
1106 | id = mount_exec_command_from_string(value); |
1107 | if (id < 0) | |
1108 | log_unit_debug(u, "Failed to parse exec-command value: %s", value); | |
a16e1123 LP |
1109 | else { |
1110 | m->control_command_id = id; | |
1111 | m->control_command = m->exec_command + id; | |
1112 | } | |
a16e1123 | 1113 | } else |
f2341e0a | 1114 | log_unit_debug(u, "Unknown serialization key: %s", key); |
a16e1123 LP |
1115 | |
1116 | return 0; | |
1117 | } | |
1118 | ||
44a6b1b6 | 1119 | _pure_ static UnitActiveState mount_active_state(Unit *u) { |
e537352b LP |
1120 | assert(u); |
1121 | ||
1122 | return state_translation_table[MOUNT(u)->state]; | |
1123 | } | |
1124 | ||
44a6b1b6 | 1125 | _pure_ static const char *mount_sub_state_to_string(Unit *u) { |
10a94420 LP |
1126 | assert(u); |
1127 | ||
a16e1123 | 1128 | return mount_state_to_string(MOUNT(u)->state); |
10a94420 LP |
1129 | } |
1130 | ||
44a6b1b6 | 1131 | _pure_ static bool mount_check_gc(Unit *u) { |
701cc384 LP |
1132 | Mount *m = MOUNT(u); |
1133 | ||
1134 | assert(m); | |
1135 | ||
6b1dc2bd | 1136 | return m->from_proc_self_mountinfo; |
701cc384 LP |
1137 | } |
1138 | ||
e537352b LP |
1139 | static void mount_sigchld_event(Unit *u, pid_t pid, int code, int status) { |
1140 | Mount *m = MOUNT(u); | |
9d2f5178 | 1141 | MountResult f; |
e537352b LP |
1142 | |
1143 | assert(m); | |
1144 | assert(pid >= 0); | |
1145 | ||
8c47c732 LP |
1146 | if (pid != m->control_pid) |
1147 | return; | |
e537352b | 1148 | |
e537352b LP |
1149 | m->control_pid = 0; |
1150 | ||
96342de6 | 1151 | if (is_clean_exit(code, status, NULL)) |
9d2f5178 LP |
1152 | f = MOUNT_SUCCESS; |
1153 | else if (code == CLD_EXITED) | |
1154 | f = MOUNT_FAILURE_EXIT_CODE; | |
1155 | else if (code == CLD_KILLED) | |
1156 | f = MOUNT_FAILURE_SIGNAL; | |
1157 | else if (code == CLD_DUMPED) | |
1158 | f = MOUNT_FAILURE_CORE_DUMP; | |
1159 | else | |
1160 | assert_not_reached("Unknown code"); | |
1161 | ||
1162 | if (f != MOUNT_SUCCESS) | |
1163 | m->result = f; | |
8c47c732 | 1164 | |
a16e1123 | 1165 | if (m->control_command) { |
6ea832a2 | 1166 | exec_status_exit(&m->control_command->exec_status, &m->exec_context, pid, code, status); |
9d2f5178 | 1167 | |
a16e1123 LP |
1168 | m->control_command = NULL; |
1169 | m->control_command_id = _MOUNT_EXEC_COMMAND_INVALID; | |
1170 | } | |
1171 | ||
f2341e0a LP |
1172 | log_unit_full(u, f == MOUNT_SUCCESS ? LOG_DEBUG : LOG_NOTICE, 0, |
1173 | "Mount process exited, code=%s status=%i", sigchld_code_to_string(code), status); | |
e537352b LP |
1174 | |
1175 | /* Note that mount(8) returning and the kernel sending us a | |
1176 | * mount table change event might happen out-of-order. If an | |
1177 | * operation succeed we assume the kernel will follow soon too | |
1178 | * and already change into the resulting state. If it fails | |
1179 | * we check if the kernel still knows about the mount. and | |
1180 | * change state accordingly. */ | |
1181 | ||
1182 | switch (m->state) { | |
1183 | ||
1184 | case MOUNT_MOUNTING: | |
1185 | case MOUNT_MOUNTING_DONE: | |
1186 | case MOUNT_MOUNTING_SIGKILL: | |
1187 | case MOUNT_MOUNTING_SIGTERM: | |
e537352b | 1188 | |
9d2f5178 LP |
1189 | if (f == MOUNT_SUCCESS) |
1190 | mount_enter_mounted(m, f); | |
e537352b | 1191 | else if (m->from_proc_self_mountinfo) |
9d2f5178 | 1192 | mount_enter_mounted(m, f); |
e537352b | 1193 | else |
9d2f5178 | 1194 | mount_enter_dead(m, f); |
e537352b LP |
1195 | break; |
1196 | ||
e2f3b44c LP |
1197 | case MOUNT_REMOUNTING: |
1198 | case MOUNT_REMOUNTING_SIGKILL: | |
1199 | case MOUNT_REMOUNTING_SIGTERM: | |
1200 | ||
9d2f5178 | 1201 | m->reload_result = f; |
e2f3b44c | 1202 | if (m->from_proc_self_mountinfo) |
9d2f5178 | 1203 | mount_enter_mounted(m, MOUNT_SUCCESS); |
e2f3b44c | 1204 | else |
9d2f5178 | 1205 | mount_enter_dead(m, MOUNT_SUCCESS); |
e2f3b44c LP |
1206 | |
1207 | break; | |
1208 | ||
e537352b LP |
1209 | case MOUNT_UNMOUNTING: |
1210 | case MOUNT_UNMOUNTING_SIGKILL: | |
1211 | case MOUNT_UNMOUNTING_SIGTERM: | |
1212 | ||
7d54a03a LP |
1213 | if (f == MOUNT_SUCCESS) { |
1214 | ||
1215 | if (m->from_proc_self_mountinfo) { | |
1216 | ||
1217 | /* Still a mount point? If so, let's | |
1218 | * try again. Most likely there were | |
1219 | * multiple mount points stacked on | |
1220 | * top of each other. Note that due to | |
1221 | * the io event priority logic we can | |
1222 | * be sure the new mountinfo is loaded | |
1223 | * before we process the SIGCHLD for | |
1224 | * the mount command. */ | |
1225 | ||
1226 | if (m->n_retry_umount < RETRY_UMOUNT_MAX) { | |
f2341e0a | 1227 | log_unit_debug(u, "Mount still present, trying again."); |
7d54a03a LP |
1228 | m->n_retry_umount++; |
1229 | mount_enter_unmounting(m); | |
1230 | } else { | |
f2341e0a | 1231 | log_unit_debug(u, "Mount still present after %u attempts to unmount, giving up.", m->n_retry_umount); |
7d54a03a LP |
1232 | mount_enter_mounted(m, f); |
1233 | } | |
1234 | } else | |
1235 | mount_enter_dead(m, f); | |
1236 | ||
1237 | } else if (m->from_proc_self_mountinfo) | |
9d2f5178 | 1238 | mount_enter_mounted(m, f); |
e537352b | 1239 | else |
9d2f5178 | 1240 | mount_enter_dead(m, f); |
e537352b LP |
1241 | break; |
1242 | ||
1243 | default: | |
1244 | assert_not_reached("Uh, control process died at wrong time."); | |
1245 | } | |
c4e2ceae LP |
1246 | |
1247 | /* Notify clients about changed exit status */ | |
1248 | unit_add_to_dbus_queue(u); | |
e537352b LP |
1249 | } |
1250 | ||
718db961 LP |
1251 | static int mount_dispatch_timer(sd_event_source *source, usec_t usec, void *userdata) { |
1252 | Mount *m = MOUNT(userdata); | |
e537352b LP |
1253 | |
1254 | assert(m); | |
718db961 | 1255 | assert(m->timer_event_source == source); |
e537352b LP |
1256 | |
1257 | switch (m->state) { | |
1258 | ||
1259 | case MOUNT_MOUNTING: | |
1260 | case MOUNT_MOUNTING_DONE: | |
f2341e0a | 1261 | log_unit_warning(UNIT(m), "Mounting timed out. Stopping."); |
9d2f5178 | 1262 | mount_enter_signal(m, MOUNT_MOUNTING_SIGTERM, MOUNT_FAILURE_TIMEOUT); |
e537352b LP |
1263 | break; |
1264 | ||
1265 | case MOUNT_REMOUNTING: | |
f2341e0a | 1266 | log_unit_warning(UNIT(m), "Remounting timed out. Stopping."); |
9d2f5178 LP |
1267 | m->reload_result = MOUNT_FAILURE_TIMEOUT; |
1268 | mount_enter_mounted(m, MOUNT_SUCCESS); | |
e537352b LP |
1269 | break; |
1270 | ||
1271 | case MOUNT_UNMOUNTING: | |
f2341e0a | 1272 | log_unit_warning(UNIT(m), "Unmounting timed out. Stopping."); |
9d2f5178 | 1273 | mount_enter_signal(m, MOUNT_UNMOUNTING_SIGTERM, MOUNT_FAILURE_TIMEOUT); |
e537352b LP |
1274 | break; |
1275 | ||
1276 | case MOUNT_MOUNTING_SIGTERM: | |
4819ff03 | 1277 | if (m->kill_context.send_sigkill) { |
f2341e0a | 1278 | log_unit_warning(UNIT(m), "Mounting timed out. Killing."); |
9d2f5178 | 1279 | mount_enter_signal(m, MOUNT_MOUNTING_SIGKILL, MOUNT_FAILURE_TIMEOUT); |
ba035df2 | 1280 | } else { |
f2341e0a | 1281 | log_unit_warning(UNIT(m), "Mounting timed out. Skipping SIGKILL. Ignoring."); |
ba035df2 LP |
1282 | |
1283 | if (m->from_proc_self_mountinfo) | |
9d2f5178 | 1284 | mount_enter_mounted(m, MOUNT_FAILURE_TIMEOUT); |
ba035df2 | 1285 | else |
9d2f5178 | 1286 | mount_enter_dead(m, MOUNT_FAILURE_TIMEOUT); |
ba035df2 | 1287 | } |
e537352b LP |
1288 | break; |
1289 | ||
1290 | case MOUNT_REMOUNTING_SIGTERM: | |
4819ff03 | 1291 | if (m->kill_context.send_sigkill) { |
f2341e0a | 1292 | log_unit_warning(UNIT(m), "Remounting timed out. Killing."); |
9d2f5178 | 1293 | mount_enter_signal(m, MOUNT_REMOUNTING_SIGKILL, MOUNT_FAILURE_TIMEOUT); |
ba035df2 | 1294 | } else { |
f2341e0a | 1295 | log_unit_warning(UNIT(m), "Remounting timed out. Skipping SIGKILL. Ignoring."); |
ba035df2 LP |
1296 | |
1297 | if (m->from_proc_self_mountinfo) | |
9d2f5178 | 1298 | mount_enter_mounted(m, MOUNT_FAILURE_TIMEOUT); |
ba035df2 | 1299 | else |
9d2f5178 | 1300 | mount_enter_dead(m, MOUNT_FAILURE_TIMEOUT); |
ba035df2 | 1301 | } |
e537352b LP |
1302 | break; |
1303 | ||
1304 | case MOUNT_UNMOUNTING_SIGTERM: | |
4819ff03 | 1305 | if (m->kill_context.send_sigkill) { |
f2341e0a | 1306 | log_unit_warning(UNIT(m), "Unmounting timed out. Killing."); |
9d2f5178 | 1307 | mount_enter_signal(m, MOUNT_UNMOUNTING_SIGKILL, MOUNT_FAILURE_TIMEOUT); |
ba035df2 | 1308 | } else { |
f2341e0a | 1309 | log_unit_warning(UNIT(m), "Unmounting timed out. Skipping SIGKILL. Ignoring."); |
ba035df2 LP |
1310 | |
1311 | if (m->from_proc_self_mountinfo) | |
9d2f5178 | 1312 | mount_enter_mounted(m, MOUNT_FAILURE_TIMEOUT); |
ba035df2 | 1313 | else |
9d2f5178 | 1314 | mount_enter_dead(m, MOUNT_FAILURE_TIMEOUT); |
ba035df2 | 1315 | } |
e537352b LP |
1316 | break; |
1317 | ||
1318 | case MOUNT_MOUNTING_SIGKILL: | |
1319 | case MOUNT_REMOUNTING_SIGKILL: | |
1320 | case MOUNT_UNMOUNTING_SIGKILL: | |
f2341e0a | 1321 | log_unit_warning(UNIT(m),"Mount process still around after SIGKILL. Ignoring."); |
e537352b LP |
1322 | |
1323 | if (m->from_proc_self_mountinfo) | |
9d2f5178 | 1324 | mount_enter_mounted(m, MOUNT_FAILURE_TIMEOUT); |
e537352b | 1325 | else |
9d2f5178 | 1326 | mount_enter_dead(m, MOUNT_FAILURE_TIMEOUT); |
e537352b LP |
1327 | break; |
1328 | ||
1329 | default: | |
1330 | assert_not_reached("Timeout at wrong time."); | |
1331 | } | |
718db961 LP |
1332 | |
1333 | return 0; | |
e537352b LP |
1334 | } |
1335 | ||
628c89cc | 1336 | static int mount_setup_unit( |
e537352b LP |
1337 | Manager *m, |
1338 | const char *what, | |
1339 | const char *where, | |
1340 | const char *options, | |
1341 | const char *fstype, | |
e537352b | 1342 | bool set_flags) { |
057d9ab8 LP |
1343 | |
1344 | _cleanup_free_ char *e = NULL, *w = NULL, *o = NULL, *f = NULL; | |
b87705cd | 1345 | bool load_extras = false; |
057d9ab8 | 1346 | MountParameters *p; |
ff5f34d0 | 1347 | bool delete, changed = false; |
057d9ab8 LP |
1348 | Unit *u; |
1349 | int r; | |
b08d03ff | 1350 | |
f50e0a01 | 1351 | assert(m); |
b08d03ff LP |
1352 | assert(what); |
1353 | assert(where); | |
e537352b LP |
1354 | assert(options); |
1355 | assert(fstype); | |
1356 | ||
e537352b LP |
1357 | /* Ignore API mount points. They should never be referenced in |
1358 | * dependencies ever. */ | |
33ff02c9 | 1359 | if (mount_point_is_api(where) || mount_point_ignore(where)) |
57f2a956 | 1360 | return 0; |
b08d03ff | 1361 | |
8d567588 LP |
1362 | if (streq(fstype, "autofs")) |
1363 | return 0; | |
1364 | ||
4e85aff4 LP |
1365 | /* probably some kind of swap, ignore */ |
1366 | if (!is_path(where)) | |
b08d03ff LP |
1367 | return 0; |
1368 | ||
7410616c LP |
1369 | r = unit_name_from_path(where, ".mount", &e); |
1370 | if (r < 0) | |
1371 | return r; | |
b08d03ff | 1372 | |
7d17cfbc MS |
1373 | u = manager_get_unit(m, e); |
1374 | if (!u) { | |
b08d03ff LP |
1375 | delete = true; |
1376 | ||
7d17cfbc | 1377 | u = unit_new(m, sizeof(Mount)); |
057d9ab8 | 1378 | if (!u) |
628c89cc | 1379 | return log_oom(); |
b08d03ff LP |
1380 | |
1381 | r = unit_add_name(u, e); | |
b08d03ff LP |
1382 | if (r < 0) |
1383 | goto fail; | |
1384 | ||
7d17cfbc MS |
1385 | MOUNT(u)->where = strdup(where); |
1386 | if (!MOUNT(u)->where) { | |
07b0b134 ML |
1387 | r = -ENOMEM; |
1388 | goto fail; | |
1389 | } | |
f50e0a01 | 1390 | |
47a81ba2 UTL |
1391 | u->source_path = strdup("/proc/self/mountinfo"); |
1392 | if (!u->source_path) { | |
1393 | r = -ENOMEM; | |
1394 | goto fail; | |
1395 | } | |
1396 | ||
b2c23da8 | 1397 | if (m->running_as == MANAGER_SYSTEM) { |
057d9ab8 LP |
1398 | const char* target; |
1399 | ||
affc3d83 | 1400 | target = mount_needs_network(options, fstype) ? SPECIAL_REMOTE_FS_TARGET : SPECIAL_LOCAL_FS_TARGET; |
057d9ab8 | 1401 | r = unit_add_dependency_by_name(u, UNIT_BEFORE, target, NULL, true); |
602c0e74 LP |
1402 | if (r < 0) |
1403 | goto fail; | |
057d9ab8 LP |
1404 | |
1405 | if (should_umount(MOUNT(u))) { | |
1406 | r = unit_add_dependency_by_name(u, UNIT_CONFLICTS, SPECIAL_UMOUNT_TARGET, NULL, true); | |
1407 | if (r < 0) | |
1408 | goto fail; | |
1409 | } | |
602c0e74 | 1410 | } |
89b1d5e0 | 1411 | |
f94ea366 | 1412 | unit_add_to_load_queue(u); |
ff5f34d0 | 1413 | changed = true; |
b08d03ff LP |
1414 | } else { |
1415 | delete = false; | |
8eba616f | 1416 | |
bcbd5405 WW |
1417 | if (!MOUNT(u)->where) { |
1418 | MOUNT(u)->where = strdup(where); | |
1419 | if (!MOUNT(u)->where) { | |
1420 | r = -ENOMEM; | |
1421 | goto fail; | |
1422 | } | |
1423 | } | |
1424 | ||
b2c23da8 | 1425 | if (m->running_as == MANAGER_SYSTEM && |
9d05dd2e | 1426 | mount_needs_network(options, fstype)) { |
a6d305f9 CL |
1427 | /* _netdev option may have shown up late, or on a |
1428 | * remount. Add remote-fs dependencies, even though | |
9d05dd2e ZJS |
1429 | * local-fs ones may already be there. */ |
1430 | unit_add_dependency_by_name(u, UNIT_BEFORE, SPECIAL_REMOTE_FS_TARGET, NULL, true); | |
1431 | load_extras = true; | |
a6d305f9 CL |
1432 | } |
1433 | ||
c2756a68 | 1434 | if (u->load_state == UNIT_NOT_FOUND) { |
8eba616f MS |
1435 | u->load_state = UNIT_LOADED; |
1436 | u->load_error = 0; | |
b87705cd LP |
1437 | |
1438 | /* Load in the extras later on, after we | |
1439 | * finished initialization of the unit */ | |
1440 | load_extras = true; | |
ff5f34d0 | 1441 | changed = true; |
8eba616f | 1442 | } |
b08d03ff LP |
1443 | } |
1444 | ||
dd7a22a9 LP |
1445 | w = strdup(what); |
1446 | o = strdup(options); | |
1447 | f = strdup(fstype); | |
1448 | if (!w || !o || !f) { | |
e537352b LP |
1449 | r = -ENOMEM; |
1450 | goto fail; | |
1451 | } | |
1452 | ||
6b1dc2bd | 1453 | p = &MOUNT(u)->parameters_proc_self_mountinfo; |
ff5f34d0 LP |
1454 | |
1455 | changed = changed || | |
1456 | !streq_ptr(p->options, options) || | |
1457 | !streq_ptr(p->what, what) || | |
1458 | !streq_ptr(p->fstype, fstype); | |
1459 | ||
6b1dc2bd LP |
1460 | if (set_flags) { |
1461 | MOUNT(u)->is_mounted = true; | |
1462 | MOUNT(u)->just_mounted = !MOUNT(u)->from_proc_self_mountinfo; | |
ff5f34d0 | 1463 | MOUNT(u)->just_changed = changed; |
ef734fd6 | 1464 | } |
f50e0a01 | 1465 | |
6b1dc2bd LP |
1466 | MOUNT(u)->from_proc_self_mountinfo = true; |
1467 | ||
4e85aff4 LP |
1468 | free(p->what); |
1469 | p->what = w; | |
057d9ab8 | 1470 | w = NULL; |
b08d03ff | 1471 | |
4e85aff4 LP |
1472 | free(p->options); |
1473 | p->options = o; | |
057d9ab8 | 1474 | o = NULL; |
e537352b | 1475 | |
4e85aff4 LP |
1476 | free(p->fstype); |
1477 | p->fstype = f; | |
057d9ab8 | 1478 | f = NULL; |
b08d03ff | 1479 | |
b87705cd LP |
1480 | if (load_extras) { |
1481 | r = mount_add_extras(MOUNT(u)); | |
1482 | if (r < 0) | |
1483 | goto fail; | |
1484 | } | |
1485 | ||
ff5f34d0 LP |
1486 | if (changed) |
1487 | unit_add_to_dbus_queue(u); | |
c1e1601e | 1488 | |
b08d03ff LP |
1489 | return 0; |
1490 | ||
1491 | fail: | |
628c89cc LP |
1492 | log_warning_errno(r, "Failed to set up mount unit: %m"); |
1493 | ||
b08d03ff LP |
1494 | if (delete && u) |
1495 | unit_free(u); | |
1496 | ||
4e85aff4 | 1497 | return r; |
b08d03ff LP |
1498 | } |
1499 | ||
ef734fd6 | 1500 | static int mount_load_proc_self_mountinfo(Manager *m, bool set_flags) { |
628c89cc LP |
1501 | _cleanup_(mnt_free_tablep) struct libmnt_table *t = NULL; |
1502 | _cleanup_(mnt_free_iterp) struct libmnt_iter *i = NULL; | |
60b912f6 | 1503 | int r = 0; |
b08d03ff LP |
1504 | |
1505 | assert(m); | |
1506 | ||
628c89cc LP |
1507 | t = mnt_new_table(); |
1508 | if (!t) | |
8d3ae2bd | 1509 | return log_oom(); |
b08d03ff | 1510 | |
628c89cc LP |
1511 | i = mnt_new_iter(MNT_ITER_FORWARD); |
1512 | if (!i) | |
1513 | return log_oom(); | |
1514 | ||
1515 | r = mnt_table_parse_mtab(t, NULL); | |
5cca8def | 1516 | if (r < 0) |
628c89cc | 1517 | return log_error_errno(r, "Failed to parse /proc/self/mountinfo: %m"); |
e537352b | 1518 | |
5cca8def ZJS |
1519 | r = 0; |
1520 | for (;;) { | |
8d3ae2bd | 1521 | const char *device, *path, *options, *fstype; |
527b7a42 | 1522 | _cleanup_free_ char *d = NULL, *p = NULL; |
628c89cc | 1523 | struct libmnt_fs *fs; |
8d3ae2bd | 1524 | int k; |
b08d03ff | 1525 | |
628c89cc | 1526 | k = mnt_table_next_fs(t, i, &fs); |
5cca8def ZJS |
1527 | if (k == 1) |
1528 | break; | |
628c89cc LP |
1529 | if (k < 0) |
1530 | return log_error_errno(k, "Failed to get next entry from /proc/self/mountinfo: %m"); | |
5cca8def | 1531 | |
8d3ae2bd CL |
1532 | device = mnt_fs_get_source(fs); |
1533 | path = mnt_fs_get_target(fs); | |
1534 | options = mnt_fs_get_options(fs); | |
1535 | fstype = mnt_fs_get_fstype(fs); | |
a2e0f3d3 | 1536 | |
c0a7f8d3 DM |
1537 | if (!device || !path) |
1538 | continue; | |
1539 | ||
527b7a42 | 1540 | if (cunescape(device, UNESCAPE_RELAX, &d) < 0) |
628c89cc LP |
1541 | return log_oom(); |
1542 | ||
527b7a42 | 1543 | if (cunescape(path, UNESCAPE_RELAX, &p) < 0) |
a57f7e2c | 1544 | return log_oom(); |
b08d03ff | 1545 | |
628c89cc LP |
1546 | (void) device_found_node(m, d, true, DEVICE_FOUND_MOUNT, set_flags); |
1547 | ||
1548 | k = mount_setup_unit(m, d, p, options, fstype, set_flags); | |
5cca8def | 1549 | if (r == 0 && k < 0) |
60b912f6 | 1550 | r = k; |
b08d03ff LP |
1551 | } |
1552 | ||
e537352b LP |
1553 | return r; |
1554 | } | |
1555 | ||
1556 | static void mount_shutdown(Manager *m) { | |
d379d442 | 1557 | |
e537352b LP |
1558 | assert(m); |
1559 | ||
718db961 LP |
1560 | m->mount_event_source = sd_event_source_unref(m->mount_event_source); |
1561 | ||
d379d442 KZ |
1562 | mnt_unref_monitor(m->mount_monitor); |
1563 | m->mount_monitor = NULL; | |
b08d03ff LP |
1564 | } |
1565 | ||
68db7a3b ZJS |
1566 | static int mount_get_timeout(Unit *u, uint64_t *timeout) { |
1567 | Mount *m = MOUNT(u); | |
1568 | int r; | |
1569 | ||
1570 | if (!m->timer_event_source) | |
1571 | return 0; | |
1572 | ||
1573 | r = sd_event_source_get_time(m->timer_event_source, timeout); | |
1574 | if (r < 0) | |
1575 | return r; | |
1576 | ||
1577 | return 1; | |
1578 | } | |
1579 | ||
ba64af90 | 1580 | static void mount_enumerate(Manager *m) { |
b08d03ff | 1581 | int r; |
d379d442 | 1582 | |
b08d03ff LP |
1583 | assert(m); |
1584 | ||
8d3ae2bd CL |
1585 | mnt_init_debug(0); |
1586 | ||
d379d442 KZ |
1587 | if (!m->mount_monitor) { |
1588 | int fd; | |
ef734fd6 | 1589 | |
d379d442 KZ |
1590 | m->mount_monitor = mnt_new_monitor(); |
1591 | if (!m->mount_monitor) { | |
ba64af90 | 1592 | log_oom(); |
718db961 | 1593 | goto fail; |
d379d442 | 1594 | } |
29083707 | 1595 | |
d379d442 | 1596 | r = mnt_monitor_enable_kernel(m->mount_monitor, 1); |
ba64af90 LP |
1597 | if (r < 0) { |
1598 | log_error_errno(r, "Failed to enable watching of kernel mount events: %m"); | |
29083707 | 1599 | goto fail; |
ba64af90 LP |
1600 | } |
1601 | ||
d379d442 | 1602 | r = mnt_monitor_enable_userspace(m->mount_monitor, 1, NULL); |
ba64af90 LP |
1603 | if (r < 0) { |
1604 | log_error_errno(r, "Failed to enable watching of userspace mount events: %m"); | |
f7c1ad4f | 1605 | goto fail; |
ba64af90 | 1606 | } |
90598531 | 1607 | |
d379d442 KZ |
1608 | /* mnt_unref_monitor() will close the fd */ |
1609 | fd = r = mnt_monitor_get_fd(m->mount_monitor); | |
ba64af90 LP |
1610 | if (r < 0) { |
1611 | log_error_errno(r, "Failed to acquire watch file descriptor: %m"); | |
f7c1ad4f | 1612 | goto fail; |
ba64af90 | 1613 | } |
befb6d54 | 1614 | |
d379d442 | 1615 | r = sd_event_add_io(m->event, &m->mount_event_source, fd, EPOLLIN, mount_dispatch_io, m); |
ba64af90 LP |
1616 | if (r < 0) { |
1617 | log_error_errno(r, "Failed to watch mount file descriptor: %m"); | |
befb6d54 | 1618 | goto fail; |
ba64af90 | 1619 | } |
befb6d54 | 1620 | |
d379d442 | 1621 | r = sd_event_source_set_priority(m->mount_event_source, -10); |
ba64af90 LP |
1622 | if (r < 0) { |
1623 | log_error_errno(r, "Failed to adjust mount watch priority: %m"); | |
befb6d54 | 1624 | goto fail; |
ba64af90 | 1625 | } |
7dfbe2e3 | 1626 | |
d379d442 | 1627 | (void) sd_event_source_set_description(m->mount_event_source, "mount-monitor-dispatch"); |
befb6d54 CL |
1628 | } |
1629 | ||
e62d8c39 ZJS |
1630 | r = mount_load_proc_self_mountinfo(m, false); |
1631 | if (r < 0) | |
b08d03ff LP |
1632 | goto fail; |
1633 | ||
ba64af90 | 1634 | return; |
b08d03ff LP |
1635 | |
1636 | fail: | |
1637 | mount_shutdown(m); | |
5cb5a6ff LP |
1638 | } |
1639 | ||
718db961 | 1640 | static int mount_dispatch_io(sd_event_source *source, int fd, uint32_t revents, void *userdata) { |
fcd8b266 | 1641 | _cleanup_set_free_ Set *around = NULL, *gone = NULL; |
718db961 | 1642 | Manager *m = userdata; |
fcd8b266 LP |
1643 | const char *what; |
1644 | Iterator i; | |
595ed347 | 1645 | Unit *u; |
ef734fd6 LP |
1646 | int r; |
1647 | ||
1648 | assert(m); | |
d379d442 | 1649 | assert(revents & EPOLLIN); |
ef734fd6 | 1650 | |
d379d442 | 1651 | if (fd == mnt_monitor_get_fd(m->mount_monitor)) { |
df63dda6 | 1652 | bool rescan = false; |
befb6d54 | 1653 | |
d379d442 KZ |
1654 | /* Drain all events and verify that the event is valid. |
1655 | * | |
1656 | * Note that libmount also monitors /run/mount mkdir if the | |
1657 | * directory does not exist yet. The mkdir may generate event | |
1658 | * which is irrelevant for us. | |
1659 | * | |
1660 | * error: r < 0; valid: r == 0, false positive: rc == 1 */ | |
1661 | do { | |
1662 | r = mnt_monitor_next_change(m->mount_monitor, NULL, NULL); | |
1663 | if (r == 0) | |
1664 | rescan = true; | |
1665 | else if (r < 0) | |
1666 | return log_error_errno(r, "Failed to drain libmount events"); | |
1667 | } while (r == 0); | |
1668 | ||
1669 | log_debug("libmount event [rescan: %s]", yes_no(rescan)); | |
befb6d54 CL |
1670 | if (!rescan) |
1671 | return 0; | |
1672 | } | |
ef734fd6 | 1673 | |
4f0eedb7 ZJS |
1674 | r = mount_load_proc_self_mountinfo(m, true); |
1675 | if (r < 0) { | |
e537352b | 1676 | /* Reset flags, just in case, for later calls */ |
595ed347 MS |
1677 | LIST_FOREACH(units_by_type, u, m->units_by_type[UNIT_MOUNT]) { |
1678 | Mount *mount = MOUNT(u); | |
e537352b LP |
1679 | |
1680 | mount->is_mounted = mount->just_mounted = mount->just_changed = false; | |
1681 | } | |
1682 | ||
718db961 | 1683 | return 0; |
ef734fd6 LP |
1684 | } |
1685 | ||
1686 | manager_dispatch_load_queue(m); | |
1687 | ||
595ed347 MS |
1688 | LIST_FOREACH(units_by_type, u, m->units_by_type[UNIT_MOUNT]) { |
1689 | Mount *mount = MOUNT(u); | |
ef734fd6 | 1690 | |
e537352b | 1691 | if (!mount->is_mounted) { |
e537352b | 1692 | |
394763f6 LP |
1693 | /* A mount point is not around right now. It |
1694 | * might be gone, or might never have | |
1695 | * existed. */ | |
1696 | ||
1697 | if (mount->from_proc_self_mountinfo && | |
1698 | mount->parameters_proc_self_mountinfo.what) { | |
1699 | ||
1700 | /* Remember that this device might just have disappeared */ | |
1701 | if (set_ensure_allocated(&gone, &string_hash_ops) < 0 || | |
1702 | set_put(gone, mount->parameters_proc_self_mountinfo.what) < 0) | |
1703 | log_oom(); /* we don't care too much about OOM here... */ | |
1704 | } | |
fcd8b266 | 1705 | |
ef734fd6 | 1706 | mount->from_proc_self_mountinfo = false; |
e537352b LP |
1707 | |
1708 | switch (mount->state) { | |
1709 | ||
1710 | case MOUNT_MOUNTED: | |
aef83136 LP |
1711 | /* This has just been unmounted by |
1712 | * somebody else, follow the state | |
1713 | * change. */ | |
9d2f5178 | 1714 | mount_enter_dead(mount, MOUNT_SUCCESS); |
e537352b LP |
1715 | break; |
1716 | ||
1717 | default: | |
e537352b | 1718 | break; |
e537352b LP |
1719 | } |
1720 | ||
1721 | } else if (mount->just_mounted || mount->just_changed) { | |
1722 | ||
fcd8b266 | 1723 | /* A mount point was added or changed */ |
e537352b LP |
1724 | |
1725 | switch (mount->state) { | |
1726 | ||
1727 | case MOUNT_DEAD: | |
fdf20a31 | 1728 | case MOUNT_FAILED: |
aef83136 LP |
1729 | /* This has just been mounted by |
1730 | * somebody else, follow the state | |
1731 | * change. */ | |
9d2f5178 | 1732 | mount_enter_mounted(mount, MOUNT_SUCCESS); |
e537352b LP |
1733 | break; |
1734 | ||
1735 | case MOUNT_MOUNTING: | |
5bcb0f2b | 1736 | mount_set_state(mount, MOUNT_MOUNTING_DONE); |
e537352b LP |
1737 | break; |
1738 | ||
1739 | default: | |
1740 | /* Nothing really changed, but let's | |
1741 | * issue an notification call | |
1742 | * nonetheless, in case somebody is | |
1743 | * waiting for this. (e.g. file system | |
1744 | * ro/rw remounts.) */ | |
1745 | mount_set_state(mount, mount->state); | |
1746 | break; | |
1747 | } | |
394763f6 | 1748 | } |
fcd8b266 | 1749 | |
394763f6 LP |
1750 | if (mount->is_mounted && |
1751 | mount->from_proc_self_mountinfo && | |
1752 | mount->parameters_proc_self_mountinfo.what) { | |
fcd8b266 | 1753 | |
394763f6 LP |
1754 | if (set_ensure_allocated(&around, &string_hash_ops) < 0 || |
1755 | set_put(around, mount->parameters_proc_self_mountinfo.what) < 0) | |
1756 | log_oom(); | |
e537352b LP |
1757 | } |
1758 | ||
1759 | /* Reset the flags for later calls */ | |
1760 | mount->is_mounted = mount->just_mounted = mount->just_changed = false; | |
1761 | } | |
718db961 | 1762 | |
fcd8b266 LP |
1763 | SET_FOREACH(what, gone, i) { |
1764 | if (set_contains(around, what)) | |
1765 | continue; | |
1766 | ||
1767 | /* Let the device units know that the device is no longer mounted */ | |
1768 | (void) device_found_node(m, what, false, DEVICE_FOUND_MOUNT, true); | |
1769 | } | |
1770 | ||
718db961 | 1771 | return 0; |
e537352b LP |
1772 | } |
1773 | ||
fdf20a31 | 1774 | static void mount_reset_failed(Unit *u) { |
5632e374 LP |
1775 | Mount *m = MOUNT(u); |
1776 | ||
1777 | assert(m); | |
1778 | ||
fdf20a31 | 1779 | if (m->state == MOUNT_FAILED) |
5632e374 LP |
1780 | mount_set_state(m, MOUNT_DEAD); |
1781 | ||
9d2f5178 LP |
1782 | m->result = MOUNT_SUCCESS; |
1783 | m->reload_result = MOUNT_SUCCESS; | |
5632e374 LP |
1784 | } |
1785 | ||
718db961 | 1786 | static int mount_kill(Unit *u, KillWho who, int signo, sd_bus_error *error) { |
814cc562 | 1787 | return unit_kill_common(u, who, signo, -1, MOUNT(u)->control_pid, error); |
8a0867d6 LP |
1788 | } |
1789 | ||
a16e1123 LP |
1790 | static const char* const mount_exec_command_table[_MOUNT_EXEC_COMMAND_MAX] = { |
1791 | [MOUNT_EXEC_MOUNT] = "ExecMount", | |
1792 | [MOUNT_EXEC_UNMOUNT] = "ExecUnmount", | |
1793 | [MOUNT_EXEC_REMOUNT] = "ExecRemount", | |
1794 | }; | |
1795 | ||
1796 | DEFINE_STRING_TABLE_LOOKUP(mount_exec_command, MountExecCommand); | |
1797 | ||
9d2f5178 LP |
1798 | static const char* const mount_result_table[_MOUNT_RESULT_MAX] = { |
1799 | [MOUNT_SUCCESS] = "success", | |
1800 | [MOUNT_FAILURE_RESOURCES] = "resources", | |
1801 | [MOUNT_FAILURE_TIMEOUT] = "timeout", | |
1802 | [MOUNT_FAILURE_EXIT_CODE] = "exit-code", | |
1803 | [MOUNT_FAILURE_SIGNAL] = "signal", | |
1804 | [MOUNT_FAILURE_CORE_DUMP] = "core-dump" | |
1805 | }; | |
1806 | ||
1807 | DEFINE_STRING_TABLE_LOOKUP(mount_result, MountResult); | |
1808 | ||
87f0e418 | 1809 | const UnitVTable mount_vtable = { |
7d17cfbc | 1810 | .object_size = sizeof(Mount), |
718db961 LP |
1811 | .exec_context_offset = offsetof(Mount, exec_context), |
1812 | .cgroup_context_offset = offsetof(Mount, cgroup_context), | |
1813 | .kill_context_offset = offsetof(Mount, kill_context), | |
613b411c | 1814 | .exec_runtime_offset = offsetof(Mount, exec_runtime), |
3ef63c31 | 1815 | |
f975e971 LP |
1816 | .sections = |
1817 | "Unit\0" | |
1818 | "Mount\0" | |
1819 | "Install\0", | |
4ad49000 | 1820 | .private_section = "Mount", |
71645aca | 1821 | |
e537352b | 1822 | .no_alias = true, |
9e2f7c11 | 1823 | .no_instances = true, |
e537352b LP |
1824 | |
1825 | .init = mount_init, | |
1826 | .load = mount_load, | |
034c6ed7 | 1827 | .done = mount_done, |
e537352b | 1828 | |
f50e0a01 LP |
1829 | .coldplug = mount_coldplug, |
1830 | ||
034c6ed7 | 1831 | .dump = mount_dump, |
5cb5a6ff | 1832 | |
e537352b LP |
1833 | .start = mount_start, |
1834 | .stop = mount_stop, | |
1835 | .reload = mount_reload, | |
1836 | ||
8a0867d6 LP |
1837 | .kill = mount_kill, |
1838 | ||
a16e1123 LP |
1839 | .serialize = mount_serialize, |
1840 | .deserialize_item = mount_deserialize_item, | |
1841 | ||
f50e0a01 | 1842 | .active_state = mount_active_state, |
10a94420 | 1843 | .sub_state_to_string = mount_sub_state_to_string, |
b08d03ff | 1844 | |
701cc384 LP |
1845 | .check_gc = mount_check_gc, |
1846 | ||
e537352b | 1847 | .sigchld_event = mount_sigchld_event, |
e537352b | 1848 | |
fdf20a31 | 1849 | .reset_failed = mount_reset_failed, |
5632e374 | 1850 | |
718db961 | 1851 | .bus_vtable = bus_mount_vtable, |
74c964d3 LP |
1852 | .bus_set_property = bus_mount_set_property, |
1853 | .bus_commit_properties = bus_mount_commit_properties, | |
4139c1b2 | 1854 | |
68db7a3b ZJS |
1855 | .get_timeout = mount_get_timeout, |
1856 | ||
0e252f6b TG |
1857 | .can_transient = true, |
1858 | ||
f50e0a01 | 1859 | .enumerate = mount_enumerate, |
c6918296 MS |
1860 | .shutdown = mount_shutdown, |
1861 | ||
1862 | .status_message_formats = { | |
1863 | .starting_stopping = { | |
1864 | [0] = "Mounting %s...", | |
1865 | [1] = "Unmounting %s...", | |
1866 | }, | |
1867 | .finished_start_job = { | |
1868 | [JOB_DONE] = "Mounted %s.", | |
1869 | [JOB_FAILED] = "Failed to mount %s.", | |
c6918296 MS |
1870 | [JOB_TIMEOUT] = "Timed out mounting %s.", |
1871 | }, | |
1872 | .finished_stop_job = { | |
1873 | [JOB_DONE] = "Unmounted %s.", | |
1874 | [JOB_FAILED] = "Failed unmounting %s.", | |
1875 | [JOB_TIMEOUT] = "Timed out unmounting %s.", | |
1876 | }, | |
1877 | }, | |
5cb5a6ff | 1878 | }; |