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db9ecf05 | 1 | /* SPDX-License-Identifier: LGPL-2.1-or-later */ |
a7334b09 | 2 | |
5cb5a6ff | 3 | #include <errno.h> |
4f5dd394 | 4 | #include <signal.h> |
b08d03ff | 5 | #include <stdio.h> |
ef734fd6 | 6 | #include <sys/epoll.h> |
5cb5a6ff | 7 | |
20ad4cfd | 8 | #include "sd-messages.h" |
4f5dd394 | 9 | |
b5efdb8a | 10 | #include "alloc-util.h" |
4139c1b2 | 11 | #include "dbus-mount.h" |
6fcbec6f | 12 | #include "dbus-unit.h" |
57b7a260 | 13 | #include "device.h" |
9a57c629 | 14 | #include "exit-status.h" |
f97b34a6 | 15 | #include "format-util.h" |
4f5dd394 | 16 | #include "fstab-util.h" |
fb36b133 | 17 | #include "libmount-util.h" |
4f5dd394 LP |
18 | #include "log.h" |
19 | #include "manager.h" | |
20 | #include "mkdir.h" | |
21 | #include "mount-setup.h" | |
22 | #include "mount.h" | |
049af8ad | 23 | #include "mountpoint-util.h" |
6bedfcbb | 24 | #include "parse-util.h" |
4f5dd394 | 25 | #include "path-util.h" |
7b3e062c | 26 | #include "process-util.h" |
d68c645b | 27 | #include "serialize.h" |
4f5dd394 | 28 | #include "special.h" |
8b43440b | 29 | #include "string-table.h" |
b5efdb8a | 30 | #include "string-util.h" |
4f5dd394 LP |
31 | #include "strv.h" |
32 | #include "unit-name.h" | |
33 | #include "unit.h" | |
5cb5a6ff | 34 | |
7d54a03a LP |
35 | #define RETRY_UMOUNT_MAX 32 |
36 | ||
f50e0a01 LP |
37 | static const UnitActiveState state_translation_table[_MOUNT_STATE_MAX] = { |
38 | [MOUNT_DEAD] = UNIT_INACTIVE, | |
39 | [MOUNT_MOUNTING] = UNIT_ACTIVATING, | |
b6ba0c16 | 40 | [MOUNT_MOUNTING_DONE] = UNIT_ACTIVATING, |
f50e0a01 | 41 | [MOUNT_MOUNTED] = UNIT_ACTIVE, |
032ff4af | 42 | [MOUNT_REMOUNTING] = UNIT_RELOADING, |
f50e0a01 | 43 | [MOUNT_UNMOUNTING] = UNIT_DEACTIVATING, |
032ff4af LP |
44 | [MOUNT_REMOUNTING_SIGTERM] = UNIT_RELOADING, |
45 | [MOUNT_REMOUNTING_SIGKILL] = UNIT_RELOADING, | |
e537352b LP |
46 | [MOUNT_UNMOUNTING_SIGTERM] = UNIT_DEACTIVATING, |
47 | [MOUNT_UNMOUNTING_SIGKILL] = UNIT_DEACTIVATING, | |
17e9d53d YW |
48 | [MOUNT_FAILED] = UNIT_FAILED, |
49 | [MOUNT_CLEANING] = UNIT_MAINTENANCE, | |
f50e0a01 | 50 | }; |
5cb5a6ff | 51 | |
718db961 LP |
52 | static int mount_dispatch_timer(sd_event_source *source, usec_t usec, void *userdata); |
53 | static int mount_dispatch_io(sd_event_source *source, int fd, uint32_t revents, void *userdata); | |
35080486 | 54 | static int mount_process_proc_self_mountinfo(Manager *m); |
718db961 | 55 | |
c634f3d2 LP |
56 | static bool MOUNT_STATE_WITH_PROCESS(MountState state) { |
57 | return IN_SET(state, | |
58 | MOUNT_MOUNTING, | |
59 | MOUNT_MOUNTING_DONE, | |
60 | MOUNT_REMOUNTING, | |
61 | MOUNT_REMOUNTING_SIGTERM, | |
62 | MOUNT_REMOUNTING_SIGKILL, | |
63 | MOUNT_UNMOUNTING, | |
64 | MOUNT_UNMOUNTING_SIGTERM, | |
17e9d53d YW |
65 | MOUNT_UNMOUNTING_SIGKILL, |
66 | MOUNT_CLEANING); | |
c634f3d2 LP |
67 | } |
68 | ||
457d6593 FB |
69 | static bool mount_is_automount(const MountParameters *p) { |
70 | assert(p); | |
71 | ||
72 | return fstab_test_option(p->options, | |
73 | "comment=systemd.automount\0" | |
74 | "x-systemd.automount\0"); | |
75 | } | |
76 | ||
7121cbcf LP |
77 | static bool mount_is_network(const MountParameters *p) { |
78 | assert(p); | |
79 | ||
80 | if (fstab_test_option(p->options, "_netdev\0")) | |
fc676b00 ZJS |
81 | return true; |
82 | ||
7121cbcf | 83 | if (p->fstype && fstype_is_network(p->fstype)) |
fc676b00 ZJS |
84 | return true; |
85 | ||
86 | return false; | |
87 | } | |
88 | ||
5a7c4f4f FB |
89 | static bool mount_is_nofail(const Mount *m) { |
90 | assert(m); | |
91 | ||
92 | if (!m->from_fragment) | |
93 | return false; | |
94 | ||
95 | return fstab_test_yes_no_option(m->parameters_fragment.options, "nofail\0" "fail\0"); | |
96 | } | |
97 | ||
d3bd0986 MK |
98 | static bool mount_is_loop(const MountParameters *p) { |
99 | assert(p); | |
100 | ||
101 | if (fstab_test_option(p->options, "loop\0")) | |
102 | return true; | |
103 | ||
104 | return false; | |
105 | } | |
106 | ||
e6a7b9f4 | 107 | static bool mount_is_bind(const MountParameters *p) { |
fc676b00 ZJS |
108 | assert(p); |
109 | ||
d15d0333 | 110 | if (fstab_test_option(p->options, "bind\0" "rbind\0")) |
fc676b00 ZJS |
111 | return true; |
112 | ||
d15d0333 | 113 | if (p->fstype && STR_IN_SET(p->fstype, "bind", "rbind")) |
fc676b00 ZJS |
114 | return true; |
115 | ||
116 | return false; | |
117 | } | |
118 | ||
ebc8968b FB |
119 | static bool mount_is_bound_to_device(const Mount *m) { |
120 | const MountParameters *p; | |
121 | ||
122 | if (m->from_fragment) | |
123 | return true; | |
124 | ||
125 | p = &m->parameters_proc_self_mountinfo; | |
126 | return fstab_test_option(p->options, "x-systemd.device-bound\0"); | |
127 | } | |
128 | ||
06e457b1 | 129 | static bool mount_needs_quota(const MountParameters *p) { |
fc676b00 ZJS |
130 | assert(p); |
131 | ||
06e457b1 LP |
132 | /* Quotas are not enabled on network filesystems, but we want them, for example, on storage connected via |
133 | * iscsi. We hence don't use mount_is_network() here, as that would also return true for _netdev devices. */ | |
11041c84 | 134 | if (p->fstype && fstype_is_network(p->fstype)) |
fc676b00 ZJS |
135 | return false; |
136 | ||
137 | if (mount_is_bind(p)) | |
138 | return false; | |
139 | ||
d15d0333 ZJS |
140 | return fstab_test_option(p->options, |
141 | "usrquota\0" "grpquota\0" "quota\0" "usrjquota\0" "grpjquota\0"); | |
fc676b00 ZJS |
142 | } |
143 | ||
a16e1123 LP |
144 | static void mount_init(Unit *u) { |
145 | Mount *m = MOUNT(u); | |
5cb5a6ff | 146 | |
a16e1123 | 147 | assert(u); |
ac155bb8 | 148 | assert(u->load_state == UNIT_STUB); |
a16e1123 | 149 | |
1f19a534 | 150 | m->timeout_usec = u->manager->default_timeout_start_usec; |
5804e1b6 AJ |
151 | |
152 | m->exec_context.std_output = u->manager->default_std_output; | |
153 | m->exec_context.std_error = u->manager->default_std_error; | |
154 | ||
3e5235b0 LP |
155 | m->directory_mode = 0755; |
156 | ||
f00929ad DJL |
157 | /* We need to make sure that /usr/bin/mount is always called |
158 | * in the same process group as us, so that the autofs kernel | |
a16e1123 LP |
159 | * side doesn't send us another mount request while we are |
160 | * already trying to comply its last one. */ | |
74922904 | 161 | m->exec_context.same_pgrp = true; |
8d567588 | 162 | |
a16e1123 | 163 | m->control_command_id = _MOUNT_EXEC_COMMAND_INVALID; |
c8f4d764 | 164 | |
5bcb0f2b | 165 | u->ignore_on_isolate = true; |
8d567588 LP |
166 | } |
167 | ||
36c16a7c | 168 | static int mount_arm_timer(Mount *m, usec_t usec) { |
718db961 LP |
169 | int r; |
170 | ||
171 | assert(m); | |
172 | ||
718db961 | 173 | if (m->timer_event_source) { |
36c16a7c | 174 | r = sd_event_source_set_time(m->timer_event_source, usec); |
718db961 LP |
175 | if (r < 0) |
176 | return r; | |
177 | ||
178 | return sd_event_source_set_enabled(m->timer_event_source, SD_EVENT_ONESHOT); | |
179 | } | |
180 | ||
36c16a7c LP |
181 | if (usec == USEC_INFINITY) |
182 | return 0; | |
183 | ||
7dfbe2e3 | 184 | r = sd_event_add_time( |
6a0f1f6d LP |
185 | UNIT(m)->manager->event, |
186 | &m->timer_event_source, | |
187 | CLOCK_MONOTONIC, | |
36c16a7c | 188 | usec, 0, |
6a0f1f6d | 189 | mount_dispatch_timer, m); |
7dfbe2e3 TG |
190 | if (r < 0) |
191 | return r; | |
192 | ||
193 | (void) sd_event_source_set_description(m->timer_event_source, "mount-timer"); | |
194 | ||
195 | return 0; | |
718db961 LP |
196 | } |
197 | ||
a16e1123 | 198 | static void mount_unwatch_control_pid(Mount *m) { |
5e94833f LP |
199 | assert(m); |
200 | ||
201 | if (m->control_pid <= 0) | |
202 | return; | |
203 | ||
204 | unit_unwatch_pid(UNIT(m), m->control_pid); | |
205 | m->control_pid = 0; | |
206 | } | |
207 | ||
e537352b LP |
208 | static void mount_parameters_done(MountParameters *p) { |
209 | assert(p); | |
210 | ||
a26592cf LP |
211 | p->what = mfree(p->what); |
212 | p->options = mfree(p->options); | |
213 | p->fstype = mfree(p->fstype); | |
e537352b LP |
214 | } |
215 | ||
87f0e418 | 216 | static void mount_done(Unit *u) { |
ef734fd6 | 217 | Mount *m = MOUNT(u); |
034c6ed7 | 218 | |
ef734fd6 | 219 | assert(m); |
034c6ed7 | 220 | |
a1e58e8e | 221 | m->where = mfree(m->where); |
f50e0a01 | 222 | |
e537352b LP |
223 | mount_parameters_done(&m->parameters_proc_self_mountinfo); |
224 | mount_parameters_done(&m->parameters_fragment); | |
ef734fd6 | 225 | |
e8a565cb | 226 | m->exec_runtime = exec_runtime_unref(m->exec_runtime, false); |
e537352b LP |
227 | exec_command_done_array(m->exec_command, _MOUNT_EXEC_COMMAND_MAX); |
228 | m->control_command = NULL; | |
f50e0a01 | 229 | |
29206d46 LP |
230 | dynamic_creds_unref(&m->dynamic_creds); |
231 | ||
a16e1123 | 232 | mount_unwatch_control_pid(m); |
f50e0a01 | 233 | |
718db961 | 234 | m->timer_event_source = sd_event_source_unref(m->timer_event_source); |
f50e0a01 LP |
235 | } |
236 | ||
219f3cd9 | 237 | static MountParameters* get_mount_parameters_fragment(Mount *m) { |
cb39ed3f LP |
238 | assert(m); |
239 | ||
240 | if (m->from_fragment) | |
241 | return &m->parameters_fragment; | |
cb39ed3f LP |
242 | |
243 | return NULL; | |
244 | } | |
245 | ||
219f3cd9 | 246 | static MountParameters* get_mount_parameters(Mount *m) { |
cb39ed3f LP |
247 | assert(m); |
248 | ||
249 | if (m->from_proc_self_mountinfo) | |
250 | return &m->parameters_proc_self_mountinfo; | |
251 | ||
6b1dc2bd | 252 | return get_mount_parameters_fragment(m); |
cb39ed3f LP |
253 | } |
254 | ||
9ddaa3e4 | 255 | static int update_parameters_proc_self_mountinfo( |
b7bbf890 ZJS |
256 | Mount *m, |
257 | const char *what, | |
258 | const char *options, | |
259 | const char *fstype) { | |
260 | ||
261 | MountParameters *p; | |
262 | int r, q, w; | |
263 | ||
264 | p = &m->parameters_proc_self_mountinfo; | |
265 | ||
266 | r = free_and_strdup(&p->what, what); | |
267 | if (r < 0) | |
268 | return r; | |
269 | ||
270 | q = free_and_strdup(&p->options, options); | |
271 | if (q < 0) | |
272 | return q; | |
273 | ||
274 | w = free_and_strdup(&p->fstype, fstype); | |
275 | if (w < 0) | |
276 | return w; | |
277 | ||
278 | return r > 0 || q > 0 || w > 0; | |
279 | } | |
280 | ||
eef85c4a | 281 | static int mount_add_mount_dependencies(Mount *m) { |
5c78d8e2 | 282 | MountParameters *pm; |
ac155bb8 | 283 | Unit *other; |
a57f7e2c | 284 | Set *s; |
b08d03ff LP |
285 | int r; |
286 | ||
6e2ef85b | 287 | assert(m); |
b08d03ff | 288 | |
a57f7e2c | 289 | if (!path_equal(m->where, "/")) { |
eef85c4a LP |
290 | _cleanup_free_ char *parent = NULL; |
291 | ||
292 | /* Adds in links to other mount points that might lie further up in the hierarchy */ | |
5f311f8c LP |
293 | |
294 | parent = dirname_malloc(m->where); | |
295 | if (!parent) | |
296 | return -ENOMEM; | |
01f78473 | 297 | |
eef85c4a | 298 | r = unit_require_mounts_for(UNIT(m), parent, UNIT_DEPENDENCY_IMPLICIT); |
4f0eedb7 | 299 | if (r < 0) |
01f78473 | 300 | return r; |
4f0eedb7 | 301 | } |
01f78473 | 302 | |
eef85c4a LP |
303 | /* Adds in dependencies to other mount points that might be needed for the source path (if this is a bind mount |
304 | * or a loop mount) to be available. */ | |
a57f7e2c | 305 | pm = get_mount_parameters_fragment(m); |
fc676b00 ZJS |
306 | if (pm && pm->what && |
307 | path_is_absolute(pm->what) && | |
d3bd0986 | 308 | (mount_is_bind(pm) || mount_is_loop(pm) || !mount_is_network(pm))) { |
fc676b00 | 309 | |
eef85c4a | 310 | r = unit_require_mounts_for(UNIT(m), pm->what, UNIT_DEPENDENCY_FILE); |
4f0eedb7 | 311 | if (r < 0) |
6e2ef85b | 312 | return r; |
4f0eedb7 | 313 | } |
b08d03ff | 314 | |
eef85c4a | 315 | /* Adds in dependencies to other units that use this path or paths further down in the hierarchy */ |
a57f7e2c | 316 | s = manager_get_units_requiring_mounts_for(UNIT(m)->manager, m->where); |
90e74a66 | 317 | SET_FOREACH(other, s) { |
b08d03ff | 318 | |
a57f7e2c LP |
319 | if (other->load_state != UNIT_LOADED) |
320 | continue; | |
b08d03ff | 321 | |
a57f7e2c LP |
322 | if (other == UNIT(m)) |
323 | continue; | |
b08d03ff | 324 | |
eef85c4a | 325 | r = unit_add_dependency(other, UNIT_AFTER, UNIT(m), true, UNIT_DEPENDENCY_PATH); |
4f0eedb7 | 326 | if (r < 0) |
6e2ef85b | 327 | return r; |
b08d03ff | 328 | |
a57f7e2c LP |
329 | if (UNIT(m)->fragment_path) { |
330 | /* If we have fragment configuration, then make this dependency required */ | |
eef85c4a | 331 | r = unit_add_dependency(other, UNIT_REQUIRES, UNIT(m), true, UNIT_DEPENDENCY_PATH); |
a57f7e2c LP |
332 | if (r < 0) |
333 | return r; | |
334 | } | |
7c8fa05c LP |
335 | } |
336 | ||
337 | return 0; | |
338 | } | |
339 | ||
eef85c4a | 340 | static int mount_add_device_dependencies(Mount *m) { |
eef85c4a LP |
341 | UnitDependencyMask mask; |
342 | MountParameters *p; | |
ebc8968b | 343 | UnitDependency dep; |
9fff8a1f | 344 | int r; |
173a8d04 LP |
345 | |
346 | assert(m); | |
347 | ||
06e97888 | 348 | p = get_mount_parameters(m); |
6b1dc2bd | 349 | if (!p) |
173a8d04 LP |
350 | return 0; |
351 | ||
9fff8a1f | 352 | if (!p->what) |
173a8d04 | 353 | return 0; |
5c78d8e2 | 354 | |
dd144c63 LP |
355 | if (mount_is_bind(p)) |
356 | return 0; | |
357 | ||
358 | if (!is_device_path(p->what)) | |
359 | return 0; | |
360 | ||
5de0acf4 LP |
361 | /* /dev/root is a really weird thing, it's not a real device, but just a path the kernel exports for |
362 | * the root file system specified on the kernel command line. Ignore it here. */ | |
363 | if (PATH_IN_SET(p->what, "/dev/root", "/dev/nfs")) | |
7ba2711d LP |
364 | return 0; |
365 | ||
dd144c63 LP |
366 | if (path_equal(m->where, "/")) |
367 | return 0; | |
368 | ||
44b0d1fd LP |
369 | /* Mount units from /proc/self/mountinfo are not bound to devices by default since they're subject to |
370 | * races when devices are unplugged. But the user can still force this dep with an appropriate option | |
371 | * (or udev property) so the mount units are automatically stopped when the device disappears | |
372 | * suddenly. */ | |
ebc8968b FB |
373 | dep = mount_is_bound_to_device(m) ? UNIT_BINDS_TO : UNIT_REQUIRES; |
374 | ||
c52c2dc6 ZJS |
375 | /* We always use 'what' from /proc/self/mountinfo if mounted */ |
376 | mask = m->from_proc_self_mountinfo ? UNIT_DEPENDENCY_MOUNTINFO_IMPLICIT : UNIT_DEPENDENCY_FILE; | |
eef85c4a | 377 | |
d336ba9f | 378 | r = unit_add_node_dependency(UNIT(m), p->what, dep, mask); |
dd144c63 LP |
379 | if (r < 0) |
380 | return r; | |
9fff8a1f | 381 | |
44b0d1fd | 382 | return unit_add_blockdev_dependency(UNIT(m), p->what, mask); |
173a8d04 LP |
383 | } |
384 | ||
eef85c4a LP |
385 | static int mount_add_quota_dependencies(Mount *m) { |
386 | UnitDependencyMask mask; | |
6b1dc2bd | 387 | MountParameters *p; |
eef85c4a | 388 | int r; |
6b1dc2bd LP |
389 | |
390 | assert(m); | |
391 | ||
463d0d15 | 392 | if (!MANAGER_IS_SYSTEM(UNIT(m)->manager)) |
6b1dc2bd LP |
393 | return 0; |
394 | ||
395 | p = get_mount_parameters_fragment(m); | |
396 | if (!p) | |
397 | return 0; | |
398 | ||
06e457b1 | 399 | if (!mount_needs_quota(p)) |
6b1dc2bd LP |
400 | return 0; |
401 | ||
eef85c4a LP |
402 | mask = m->from_fragment ? UNIT_DEPENDENCY_FILE : UNIT_DEPENDENCY_MOUNTINFO_IMPLICIT; |
403 | ||
5a724170 | 404 | r = unit_add_two_dependencies_by_name(UNIT(m), UNIT_BEFORE, UNIT_WANTS, SPECIAL_QUOTACHECK_SERVICE, true, mask); |
6b1dc2bd LP |
405 | if (r < 0) |
406 | return r; | |
407 | ||
5a724170 | 408 | r = unit_add_two_dependencies_by_name(UNIT(m), UNIT_BEFORE, UNIT_WANTS, SPECIAL_QUOTAON_SERVICE, true, mask); |
6b1dc2bd LP |
409 | if (r < 0) |
410 | return r; | |
411 | ||
412 | return 0; | |
413 | } | |
414 | ||
39c79477 | 415 | static bool mount_is_extrinsic(Unit *u) { |
88ac30a1 | 416 | MountParameters *p; |
39c79477 | 417 | Mount *m = MOUNT(u); |
ad2706db | 418 | assert(m); |
88ac30a1 | 419 | |
bc9e5a4c FB |
420 | /* Returns true for all units that are "magic" and should be excluded from the usual |
421 | * start-up and shutdown dependencies. We call them "extrinsic" here, as they are generally | |
422 | * mounted outside of the systemd dependency logic. We shouldn't attempt to manage them | |
423 | * ourselves but it's fine if the user operates on them with us. */ | |
ad2706db | 424 | |
bc9e5a4c | 425 | /* We only automatically manage mounts if we are in system mode */ |
39c79477 | 426 | if (MANAGER_IS_USER(u->manager)) |
b8e5776d LP |
427 | return true; |
428 | ||
88ac30a1 | 429 | p = get_mount_parameters(m); |
bc9e5a4c | 430 | if (p && fstab_is_extrinsic(m->where, p->options)) |
ad2706db | 431 | return true; |
88ac30a1 | 432 | |
ad2706db | 433 | return false; |
88ac30a1 TG |
434 | } |
435 | ||
61154cf9 FB |
436 | static int mount_add_default_ordering_dependencies( |
437 | Mount *m, | |
438 | MountParameters *p, | |
439 | UnitDependencyMask mask) { | |
440 | ||
83cdc870 | 441 | const char *after, *before, *e; |
d54bab90 | 442 | int r; |
2edd4434 LP |
443 | |
444 | assert(m); | |
445 | ||
83cdc870 FB |
446 | e = path_startswith(m->where, "/sysroot"); |
447 | if (e && in_initrd()) { | |
448 | /* All mounts under /sysroot need to happen later, at initrd-fs.target time. IOW, | |
449 | * it's not technically part of the basic initrd filesystem itself, and so | |
450 | * shouldn't inherit the default Before=local-fs.target dependency. */ | |
451 | ||
452 | after = NULL; | |
453 | before = isempty(e) ? SPECIAL_INITRD_ROOT_FS_TARGET : SPECIAL_INITRD_FS_TARGET; | |
454 | ||
455 | } else if (mount_is_network(p)) { | |
ea0ec5ce | 456 | after = SPECIAL_REMOTE_FS_PRE_TARGET; |
d54bab90 | 457 | before = SPECIAL_REMOTE_FS_TARGET; |
2ec15c4f | 458 | |
d54bab90 | 459 | } else { |
ea0ec5ce | 460 | after = SPECIAL_LOCAL_FS_PRE_TARGET; |
d54bab90 LP |
461 | before = SPECIAL_LOCAL_FS_TARGET; |
462 | } | |
463 | ||
5a7c4f4f | 464 | if (!mount_is_nofail(m) && !mount_is_automount(p)) { |
8c8203db YW |
465 | r = unit_add_dependency_by_name(UNIT(m), UNIT_BEFORE, before, true, mask); |
466 | if (r < 0) | |
467 | return r; | |
468 | } | |
ea0ec5ce | 469 | |
83cdc870 FB |
470 | if (after) { |
471 | r = unit_add_dependency_by_name(UNIT(m), UNIT_AFTER, after, true, mask); | |
472 | if (r < 0) | |
473 | return r; | |
474 | } | |
e8d2f6cd | 475 | |
61154cf9 FB |
476 | return unit_add_two_dependencies_by_name(UNIT(m), UNIT_BEFORE, UNIT_CONFLICTS, |
477 | SPECIAL_UMOUNT_TARGET, true, mask); | |
478 | } | |
479 | ||
2edd4434 | 480 | static int mount_add_default_dependencies(Mount *m) { |
eef85c4a | 481 | UnitDependencyMask mask; |
9ddc4a26 | 482 | MountParameters *p; |
d54bab90 | 483 | int r; |
2edd4434 LP |
484 | |
485 | assert(m); | |
486 | ||
4c9ea260 LP |
487 | if (!UNIT(m)->default_dependencies) |
488 | return 0; | |
489 | ||
61154cf9 FB |
490 | /* We do not add any default dependencies to /, /usr or /run/initramfs/, since they are |
491 | * guaranteed to stay mounted the whole time, since our system is on it. Also, don't | |
492 | * bother with anything mounted below virtual file systems, it's also going to be virtual, | |
493 | * and hence not worth the effort. */ | |
39c79477 | 494 | if (mount_is_extrinsic(UNIT(m))) |
6b1dc2bd | 495 | return 0; |
2edd4434 | 496 | |
874d3404 LP |
497 | p = get_mount_parameters(m); |
498 | if (!p) | |
6b1dc2bd LP |
499 | return 0; |
500 | ||
eef85c4a | 501 | mask = m->from_fragment ? UNIT_DEPENDENCY_FILE : UNIT_DEPENDENCY_MOUNTINFO_DEFAULT; |
61154cf9 FB |
502 | |
503 | r = mount_add_default_ordering_dependencies(m, p, mask); | |
ad2706db LP |
504 | if (r < 0) |
505 | return r; | |
eef85c4a | 506 | |
e8d2f6cd | 507 | if (mount_is_network(p)) { |
2ec15c4f FB |
508 | /* We order ourselves after network.target. This is primarily useful at shutdown: |
509 | * services that take down the network should order themselves before | |
510 | * network.target, so that they are shut down only after this mount unit is | |
511 | * stopped. */ | |
6b1dc2bd | 512 | |
35d8c19a | 513 | r = unit_add_dependency_by_name(UNIT(m), UNIT_AFTER, SPECIAL_NETWORK_TARGET, true, mask); |
a63a5c46 LP |
514 | if (r < 0) |
515 | return r; | |
a63a5c46 | 516 | |
2ec15c4f FB |
517 | /* We pull in network-online.target, and order ourselves after it. This is useful |
518 | * at start-up to actively pull in tools that want to be started before we start | |
519 | * mounting network file systems, and whose purpose it is to delay this until the | |
520 | * network is "up". */ | |
ea0ec5ce | 521 | |
5a724170 | 522 | r = unit_add_two_dependencies_by_name(UNIT(m), UNIT_WANTS, UNIT_AFTER, SPECIAL_NETWORK_ONLINE_TARGET, true, mask); |
e8d2f6cd LP |
523 | if (r < 0) |
524 | return r; | |
d54bab90 LP |
525 | } |
526 | ||
3e3852b3 | 527 | /* If this is a tmpfs mount then we have to unmount it before we try to deactivate swaps */ |
74b1731c | 528 | if (streq_ptr(p->fstype, "tmpfs")) { |
35d8c19a | 529 | r = unit_add_dependency_by_name(UNIT(m), UNIT_AFTER, SPECIAL_SWAP_TARGET, true, mask); |
3e3852b3 LP |
530 | if (r < 0) |
531 | return r; | |
532 | } | |
533 | ||
2edd4434 LP |
534 | return 0; |
535 | } | |
536 | ||
8d567588 | 537 | static int mount_verify(Mount *m) { |
a57f7e2c | 538 | _cleanup_free_ char *e = NULL; |
b294b79f | 539 | MountParameters *p; |
7410616c | 540 | int r; |
a57f7e2c | 541 | |
8d567588 | 542 | assert(m); |
75193d41 | 543 | assert(UNIT(m)->load_state == UNIT_LOADED); |
8d567588 | 544 | |
1df96fcb | 545 | if (!m->from_fragment && !m->from_proc_self_mountinfo && !UNIT(m)->perpetual) |
8cbef760 LP |
546 | return -ENOENT; |
547 | ||
7410616c LP |
548 | r = unit_name_from_path(m->where, ".mount", &e); |
549 | if (r < 0) | |
f2341e0a | 550 | return log_unit_error_errno(UNIT(m), r, "Failed to generate unit name from mount path: %m"); |
8d567588 | 551 | |
d85ff944 YW |
552 | if (!unit_has_name(UNIT(m), e)) |
553 | return log_unit_error_errno(UNIT(m), SYNTHETIC_ERRNO(ENOEXEC), "Where= setting doesn't match unit name. Refusing."); | |
8d567588 | 554 | |
d85ff944 YW |
555 | if (mount_point_is_api(m->where) || mount_point_ignore(m->where)) |
556 | return log_unit_error_errno(UNIT(m), SYNTHETIC_ERRNO(ENOEXEC), "Cannot create mount unit for API file system %s. Refusing.", m->where); | |
33ff02c9 | 557 | |
b294b79f | 558 | p = get_mount_parameters_fragment(m); |
0879fbd6 LP |
559 | if (p && !p->what && !UNIT(m)->perpetual) |
560 | return log_unit_error_errno(UNIT(m), SYNTHETIC_ERRNO(ENOEXEC), | |
561 | "What= setting is missing. Refusing."); | |
4e85aff4 | 562 | |
d85ff944 YW |
563 | if (m->exec_context.pam_name && m->kill_context.kill_mode != KILL_CONTROL_GROUP) |
564 | return log_unit_error_errno(UNIT(m), SYNTHETIC_ERRNO(ENOEXEC), "Unit has PAM enabled. Kill mode must be set to control-group'. Refusing."); | |
4d0e5dbd | 565 | |
8d567588 LP |
566 | return 0; |
567 | } | |
568 | ||
bf7eedbf LP |
569 | static int mount_add_non_exec_dependencies(Mount *m) { |
570 | int r; | |
571 | assert(m); | |
572 | ||
573 | /* Adds in all dependencies directly responsible for ordering the mount, as opposed to dependencies | |
574 | * resulting from the ExecContext and such. */ | |
575 | ||
576 | r = mount_add_device_dependencies(m); | |
577 | if (r < 0) | |
578 | return r; | |
579 | ||
580 | r = mount_add_mount_dependencies(m); | |
581 | if (r < 0) | |
582 | return r; | |
583 | ||
584 | r = mount_add_quota_dependencies(m); | |
585 | if (r < 0) | |
586 | return r; | |
587 | ||
588 | r = mount_add_default_dependencies(m); | |
589 | if (r < 0) | |
590 | return r; | |
591 | ||
592 | return 0; | |
593 | } | |
594 | ||
1a4ac875 MS |
595 | static int mount_add_extras(Mount *m) { |
596 | Unit *u = UNIT(m); | |
e537352b LP |
597 | int r; |
598 | ||
e821075a LP |
599 | assert(m); |
600 | ||
1f736476 LP |
601 | /* Note: this call might be called after we already have been loaded once (and even when it has already been |
602 | * activated), in case data from /proc/self/mountinfo has changed. This means all code here needs to be ready | |
603 | * to run with an already set up unit. */ | |
604 | ||
e821075a | 605 | if (u->fragment_path) |
1a4ac875 | 606 | m->from_fragment = true; |
e537352b | 607 | |
1a4ac875 | 608 | if (!m->where) { |
7410616c LP |
609 | r = unit_name_to_path(u->id, &m->where); |
610 | if (r < 0) | |
611 | return r; | |
1a4ac875 | 612 | } |
a16e1123 | 613 | |
858d36c1 | 614 | path_simplify(m->where, false); |
e537352b | 615 | |
e821075a | 616 | if (!u->description) { |
1a4ac875 MS |
617 | r = unit_set_description(u, m->where); |
618 | if (r < 0) | |
173a8d04 | 619 | return r; |
1a4ac875 | 620 | } |
6e2ef85b | 621 | |
598459ce LP |
622 | r = unit_patch_contexts(u); |
623 | if (r < 0) | |
624 | return r; | |
4e67ddd6 | 625 | |
598459ce | 626 | r = unit_add_exec_dependencies(u, &m->exec_context); |
a016b922 LP |
627 | if (r < 0) |
628 | return r; | |
629 | ||
d79200e2 | 630 | r = unit_set_default_slice(u); |
1a4ac875 MS |
631 | if (r < 0) |
632 | return r; | |
633 | ||
bf7eedbf | 634 | r = mount_add_non_exec_dependencies(m); |
4c9ea260 LP |
635 | if (r < 0) |
636 | return r; | |
598459ce | 637 | |
1a4ac875 MS |
638 | return 0; |
639 | } | |
640 | ||
75193d41 | 641 | static void mount_load_root_mount(Unit *u) { |
11222d0f LP |
642 | assert(u); |
643 | ||
644 | if (!unit_has_name(u, SPECIAL_ROOT_MOUNT)) | |
75193d41 | 645 | return; |
11222d0f LP |
646 | |
647 | u->perpetual = true; | |
648 | u->default_dependencies = false; | |
649 | ||
650 | /* The stdio/kmsg bridge socket is on /, in order to avoid a dep loop, don't use kmsg logging for -.mount */ | |
651 | MOUNT(u)->exec_context.std_output = EXEC_OUTPUT_NULL; | |
652 | MOUNT(u)->exec_context.std_input = EXEC_INPUT_NULL; | |
653 | ||
654 | if (!u->description) | |
655 | u->description = strdup("Root Mount"); | |
11222d0f LP |
656 | } |
657 | ||
1a4ac875 MS |
658 | static int mount_load(Unit *u) { |
659 | Mount *m = MOUNT(u); | |
75193d41 | 660 | int r, q = 0; |
1a4ac875 MS |
661 | |
662 | assert(u); | |
663 | assert(u->load_state == UNIT_STUB); | |
664 | ||
75193d41 | 665 | mount_load_root_mount(u); |
11222d0f | 666 | |
c3620770 | 667 | bool fragment_optional = m->from_proc_self_mountinfo || u->perpetual; |
75193d41 | 668 | r = unit_load_fragment_and_dropin(u, !fragment_optional); |
780ae022 LP |
669 | |
670 | /* Add in some extras. Note we do this in all cases (even if we failed to load the unit) when announced by the | |
671 | * kernel, because we need some things to be set up no matter what when the kernel establishes a mount and thus | |
672 | * we need to update the state in our unit to track it. After all, consider that we don't allow changing the | |
673 | * 'slice' field for a unit once it is active. */ | |
674 | if (u->load_state == UNIT_LOADED || m->from_proc_self_mountinfo || u->perpetual) | |
75193d41 | 675 | q = mount_add_extras(m); |
780ae022 | 676 | |
1a4ac875 MS |
677 | if (r < 0) |
678 | return r; | |
780ae022 LP |
679 | if (q < 0) |
680 | return q; | |
75193d41 ZJS |
681 | if (u->load_state != UNIT_LOADED) |
682 | return 0; | |
e537352b | 683 | |
8d567588 | 684 | return mount_verify(m); |
e537352b LP |
685 | } |
686 | ||
687 | static void mount_set_state(Mount *m, MountState state) { | |
688 | MountState old_state; | |
689 | assert(m); | |
690 | ||
6fcbec6f LP |
691 | if (m->state != state) |
692 | bus_unit_send_pending_change_signal(UNIT(m), false); | |
693 | ||
e537352b LP |
694 | old_state = m->state; |
695 | m->state = state; | |
696 | ||
c634f3d2 | 697 | if (!MOUNT_STATE_WITH_PROCESS(state)) { |
718db961 | 698 | m->timer_event_source = sd_event_source_unref(m->timer_event_source); |
a16e1123 | 699 | mount_unwatch_control_pid(m); |
e537352b | 700 | m->control_command = NULL; |
a16e1123 | 701 | m->control_command_id = _MOUNT_EXEC_COMMAND_INVALID; |
e537352b LP |
702 | } |
703 | ||
704 | if (state != old_state) | |
f2341e0a | 705 | log_unit_debug(UNIT(m), "Changed %s -> %s", mount_state_to_string(old_state), mount_state_to_string(state)); |
e537352b | 706 | |
2ad2e41a LP |
707 | unit_notify(UNIT(m), state_translation_table[old_state], state_translation_table[state], |
708 | m->reload_result == MOUNT_SUCCESS ? 0 : UNIT_NOTIFY_RELOAD_FAILURE); | |
e537352b LP |
709 | } |
710 | ||
be847e82 | 711 | static int mount_coldplug(Unit *u) { |
e537352b | 712 | Mount *m = MOUNT(u); |
a16e1123 LP |
713 | MountState new_state = MOUNT_DEAD; |
714 | int r; | |
e537352b LP |
715 | |
716 | assert(m); | |
717 | assert(m->state == MOUNT_DEAD); | |
718 | ||
a16e1123 LP |
719 | if (m->deserialized_state != m->state) |
720 | new_state = m->deserialized_state; | |
721 | else if (m->from_proc_self_mountinfo) | |
722 | new_state = MOUNT_MOUNTED; | |
e537352b | 723 | |
5bcb0f2b LP |
724 | if (new_state == m->state) |
725 | return 0; | |
e537352b | 726 | |
c386f588 LP |
727 | if (m->control_pid > 0 && |
728 | pid_is_unwaited(m->control_pid) && | |
c634f3d2 | 729 | MOUNT_STATE_WITH_PROCESS(new_state)) { |
5bcb0f2b | 730 | |
f75f613d | 731 | r = unit_watch_pid(UNIT(m), m->control_pid, false); |
5bcb0f2b LP |
732 | if (r < 0) |
733 | return r; | |
e537352b | 734 | |
36c16a7c | 735 | r = mount_arm_timer(m, usec_add(u->state_change_timestamp.monotonic, m->timeout_usec)); |
5bcb0f2b LP |
736 | if (r < 0) |
737 | return r; | |
a16e1123 | 738 | } |
e537352b | 739 | |
e8a565cb | 740 | if (!IN_SET(new_state, MOUNT_DEAD, MOUNT_FAILED)) { |
29206d46 | 741 | (void) unit_setup_dynamic_creds(u); |
e8a565cb YW |
742 | (void) unit_setup_exec_runtime(u); |
743 | } | |
29206d46 | 744 | |
5bcb0f2b | 745 | mount_set_state(m, new_state); |
e537352b | 746 | return 0; |
e537352b LP |
747 | } |
748 | ||
749 | static void mount_dump(Unit *u, FILE *f, const char *prefix) { | |
f2e18ef1 | 750 | char buf[FORMAT_TIMESPAN_MAX]; |
e537352b LP |
751 | Mount *m = MOUNT(u); |
752 | MountParameters *p; | |
753 | ||
754 | assert(m); | |
755 | assert(f); | |
756 | ||
cb39ed3f | 757 | p = get_mount_parameters(m); |
e537352b LP |
758 | |
759 | fprintf(f, | |
760 | "%sMount State: %s\n" | |
81a5c6d0 | 761 | "%sResult: %s\n" |
17e9d53d | 762 | "%sClean Result: %s\n" |
e537352b LP |
763 | "%sWhere: %s\n" |
764 | "%sWhat: %s\n" | |
765 | "%sFile System Type: %s\n" | |
766 | "%sOptions: %s\n" | |
e537352b LP |
767 | "%sFrom /proc/self/mountinfo: %s\n" |
768 | "%sFrom fragment: %s\n" | |
ad2706db | 769 | "%sExtrinsic: %s\n" |
e520950a | 770 | "%sDirectoryMode: %04o\n" |
49915de2 | 771 | "%sSloppyOptions: %s\n" |
4f8d40a9 | 772 | "%sLazyUnmount: %s\n" |
91899792 | 773 | "%sForceUnmount: %s\n" |
c600357b | 774 | "%sReadWriteOnly: %s\n" |
ac8956ef | 775 | "%sTimeoutSec: %s\n", |
a16e1123 | 776 | prefix, mount_state_to_string(m->state), |
81a5c6d0 | 777 | prefix, mount_result_to_string(m->result), |
17e9d53d | 778 | prefix, mount_result_to_string(m->clean_result), |
e537352b | 779 | prefix, m->where, |
1e4fc9b1 HH |
780 | prefix, p ? strna(p->what) : "n/a", |
781 | prefix, p ? strna(p->fstype) : "n/a", | |
782 | prefix, p ? strna(p->options) : "n/a", | |
e537352b LP |
783 | prefix, yes_no(m->from_proc_self_mountinfo), |
784 | prefix, yes_no(m->from_fragment), | |
39c79477 | 785 | prefix, yes_no(mount_is_extrinsic(u)), |
e520950a | 786 | prefix, m->directory_mode, |
49915de2 | 787 | prefix, yes_no(m->sloppy_options), |
4f8d40a9 | 788 | prefix, yes_no(m->lazy_unmount), |
91899792 | 789 | prefix, yes_no(m->force_unmount), |
c600357b | 790 | prefix, yes_no(m->read_write_only), |
91899792 | 791 | prefix, format_timespan(buf, sizeof(buf), m->timeout_usec, USEC_PER_SEC)); |
e537352b LP |
792 | |
793 | if (m->control_pid > 0) | |
794 | fprintf(f, | |
ccd06097 ZJS |
795 | "%sControl PID: "PID_FMT"\n", |
796 | prefix, m->control_pid); | |
e537352b LP |
797 | |
798 | exec_context_dump(&m->exec_context, f, prefix); | |
4819ff03 | 799 | kill_context_dump(&m->kill_context, f, prefix); |
bc0623df | 800 | cgroup_context_dump(UNIT(m), f, prefix); |
e537352b LP |
801 | } |
802 | ||
a16e1123 | 803 | static int mount_spawn(Mount *m, ExecCommand *c, pid_t *_pid) { |
3c7416b6 | 804 | |
b9c04eaf | 805 | _cleanup_(exec_params_clear) ExecParameters exec_params = { |
5686391b LP |
806 | .flags = EXEC_APPLY_SANDBOXING|EXEC_APPLY_CHROOT|EXEC_APPLY_TTY_STDIN, |
807 | .stdin_fd = -1, | |
808 | .stdout_fd = -1, | |
809 | .stderr_fd = -1, | |
810 | .exec_fd = -1, | |
9fa95f85 | 811 | }; |
3c7416b6 LP |
812 | pid_t pid; |
813 | int r; | |
a16e1123 LP |
814 | |
815 | assert(m); | |
816 | assert(c); | |
817 | assert(_pid); | |
818 | ||
3c7416b6 | 819 | r = unit_prepare_exec(UNIT(m)); |
29206d46 LP |
820 | if (r < 0) |
821 | return r; | |
822 | ||
36c16a7c | 823 | r = mount_arm_timer(m, usec_add(now(CLOCK_MONOTONIC), m->timeout_usec)); |
36697dc0 | 824 | if (r < 0) |
36c16a7c | 825 | return r; |
a16e1123 | 826 | |
1ad6e8b3 LP |
827 | r = unit_set_exec_params(UNIT(m), &exec_params); |
828 | if (r < 0) | |
829 | return r; | |
9fa95f85 | 830 | |
f2341e0a LP |
831 | r = exec_spawn(UNIT(m), |
832 | c, | |
4ad49000 | 833 | &m->exec_context, |
9fa95f85 | 834 | &exec_params, |
613b411c | 835 | m->exec_runtime, |
29206d46 | 836 | &m->dynamic_creds, |
4ad49000 LP |
837 | &pid); |
838 | if (r < 0) | |
36c16a7c | 839 | return r; |
a16e1123 | 840 | |
f75f613d | 841 | r = unit_watch_pid(UNIT(m), pid, true); |
4ad49000 | 842 | if (r < 0) |
36c16a7c | 843 | return r; |
a16e1123 LP |
844 | |
845 | *_pid = pid; | |
846 | ||
847 | return 0; | |
a16e1123 LP |
848 | } |
849 | ||
9d2f5178 | 850 | static void mount_enter_dead(Mount *m, MountResult f) { |
e537352b LP |
851 | assert(m); |
852 | ||
a0fef983 | 853 | if (m->result == MOUNT_SUCCESS) |
9d2f5178 | 854 | m->result = f; |
e537352b | 855 | |
aac99f30 | 856 | unit_log_result(UNIT(m), m->result == MOUNT_SUCCESS, mount_result_to_string(m->result)); |
4c425434 LP |
857 | unit_warn_leftover_processes(UNIT(m), unit_log_leftover_process_stop); |
858 | ||
29206d46 LP |
859 | mount_set_state(m, m->result != MOUNT_SUCCESS ? MOUNT_FAILED : MOUNT_DEAD); |
860 | ||
e8a565cb | 861 | m->exec_runtime = exec_runtime_unref(m->exec_runtime, true); |
613b411c | 862 | |
bb0c0d6f | 863 | unit_destroy_runtime_data(UNIT(m), &m->exec_context); |
e66cf1a3 | 864 | |
00d9ef85 LP |
865 | unit_unref_uid_gid(UNIT(m), true); |
866 | ||
29206d46 | 867 | dynamic_creds_destroy(&m->dynamic_creds); |
c52c2dc6 ZJS |
868 | |
869 | /* Any dependencies based on /proc/self/mountinfo are now stale */ | |
870 | unit_remove_dependencies(UNIT(m), UNIT_DEPENDENCY_MOUNTINFO_IMPLICIT); | |
e537352b LP |
871 | } |
872 | ||
9d2f5178 | 873 | static void mount_enter_mounted(Mount *m, MountResult f) { |
80876c20 LP |
874 | assert(m); |
875 | ||
a0fef983 | 876 | if (m->result == MOUNT_SUCCESS) |
9d2f5178 | 877 | m->result = f; |
80876c20 LP |
878 | |
879 | mount_set_state(m, MOUNT_MOUNTED); | |
880 | } | |
881 | ||
22af0e58 LP |
882 | static void mount_enter_dead_or_mounted(Mount *m, MountResult f) { |
883 | assert(m); | |
884 | ||
885 | /* Enter DEAD or MOUNTED state, depending on what the kernel currently says about the mount point. We use this | |
886 | * whenever we executed an operation, so that our internal state reflects what the kernel says again, after all | |
887 | * ultimately we just mirror the kernel's internal state on this. */ | |
888 | ||
889 | if (m->from_proc_self_mountinfo) | |
890 | mount_enter_mounted(m, f); | |
891 | else | |
892 | mount_enter_dead(m, f); | |
893 | } | |
894 | ||
895 | static int state_to_kill_operation(MountState state) { | |
896 | switch (state) { | |
897 | ||
898 | case MOUNT_REMOUNTING_SIGTERM: | |
a232ebcc ZJS |
899 | return KILL_RESTART; |
900 | ||
22af0e58 LP |
901 | case MOUNT_UNMOUNTING_SIGTERM: |
902 | return KILL_TERMINATE; | |
903 | ||
904 | case MOUNT_REMOUNTING_SIGKILL: | |
905 | case MOUNT_UNMOUNTING_SIGKILL: | |
906 | return KILL_KILL; | |
907 | ||
908 | default: | |
909 | return _KILL_OPERATION_INVALID; | |
910 | } | |
911 | } | |
912 | ||
9d2f5178 | 913 | static void mount_enter_signal(Mount *m, MountState state, MountResult f) { |
e537352b LP |
914 | int r; |
915 | ||
916 | assert(m); | |
917 | ||
a0fef983 | 918 | if (m->result == MOUNT_SUCCESS) |
9d2f5178 | 919 | m->result = f; |
e537352b | 920 | |
cd2086fe LP |
921 | r = unit_kill_context( |
922 | UNIT(m), | |
923 | &m->kill_context, | |
22af0e58 | 924 | state_to_kill_operation(state), |
cd2086fe LP |
925 | -1, |
926 | m->control_pid, | |
927 | false); | |
928 | if (r < 0) | |
929 | goto fail; | |
e537352b | 930 | |
cd2086fe | 931 | if (r > 0) { |
36c16a7c | 932 | r = mount_arm_timer(m, usec_add(now(CLOCK_MONOTONIC), m->timeout_usec)); |
36697dc0 | 933 | if (r < 0) |
80876c20 | 934 | goto fail; |
e537352b | 935 | |
80876c20 | 936 | mount_set_state(m, state); |
22af0e58 | 937 | } else if (state == MOUNT_REMOUNTING_SIGTERM && m->kill_context.send_sigkill) |
ac84d1fb | 938 | mount_enter_signal(m, MOUNT_REMOUNTING_SIGKILL, MOUNT_SUCCESS); |
22af0e58 | 939 | else if (IN_SET(state, MOUNT_REMOUNTING_SIGTERM, MOUNT_REMOUNTING_SIGKILL)) |
9d2f5178 | 940 | mount_enter_mounted(m, MOUNT_SUCCESS); |
22af0e58 | 941 | else if (state == MOUNT_UNMOUNTING_SIGTERM && m->kill_context.send_sigkill) |
ac84d1fb | 942 | mount_enter_signal(m, MOUNT_UNMOUNTING_SIGKILL, MOUNT_SUCCESS); |
80876c20 | 943 | else |
22af0e58 | 944 | mount_enter_dead_or_mounted(m, MOUNT_SUCCESS); |
e537352b LP |
945 | |
946 | return; | |
947 | ||
948 | fail: | |
f2341e0a | 949 | log_unit_warning_errno(UNIT(m), r, "Failed to kill processes: %m"); |
22af0e58 | 950 | mount_enter_dead_or_mounted(m, MOUNT_FAILURE_RESOURCES); |
5261ba90 TT |
951 | } |
952 | ||
9d2f5178 | 953 | static void mount_enter_unmounting(Mount *m) { |
e537352b LP |
954 | int r; |
955 | ||
956 | assert(m); | |
957 | ||
7d54a03a LP |
958 | /* Start counting our attempts */ |
959 | if (!IN_SET(m->state, | |
960 | MOUNT_UNMOUNTING, | |
961 | MOUNT_UNMOUNTING_SIGTERM, | |
962 | MOUNT_UNMOUNTING_SIGKILL)) | |
963 | m->n_retry_umount = 0; | |
964 | ||
a16e1123 LP |
965 | m->control_command_id = MOUNT_EXEC_UNMOUNT; |
966 | m->control_command = m->exec_command + MOUNT_EXEC_UNMOUNT; | |
e537352b | 967 | |
83897d54 | 968 | r = exec_command_set(m->control_command, UMOUNT_PATH, m->where, "-c", NULL); |
e520950a BR |
969 | if (r >= 0 && m->lazy_unmount) |
970 | r = exec_command_append(m->control_command, "-l", NULL); | |
4f8d40a9 BR |
971 | if (r >= 0 && m->force_unmount) |
972 | r = exec_command_append(m->control_command, "-f", NULL); | |
7d54a03a | 973 | if (r < 0) |
e537352b LP |
974 | goto fail; |
975 | ||
a16e1123 | 976 | mount_unwatch_control_pid(m); |
5e94833f | 977 | |
7d54a03a LP |
978 | r = mount_spawn(m, m->control_command, &m->control_pid); |
979 | if (r < 0) | |
e537352b LP |
980 | goto fail; |
981 | ||
982 | mount_set_state(m, MOUNT_UNMOUNTING); | |
983 | ||
984 | return; | |
985 | ||
986 | fail: | |
f2341e0a | 987 | log_unit_warning_errno(UNIT(m), r, "Failed to run 'umount' task: %m"); |
22af0e58 | 988 | mount_enter_dead_or_mounted(m, MOUNT_FAILURE_RESOURCES); |
e537352b LP |
989 | } |
990 | ||
8d567588 | 991 | static void mount_enter_mounting(Mount *m) { |
e537352b | 992 | int r; |
cb39ed3f | 993 | MountParameters *p; |
e537352b LP |
994 | |
995 | assert(m); | |
996 | ||
25cd4964 | 997 | r = unit_fail_if_noncanonical(UNIT(m), m->where); |
f2341e0a LP |
998 | if (r < 0) |
999 | goto fail; | |
1000 | ||
1001 | (void) mkdir_p_label(m->where, m->directory_mode); | |
3e5235b0 | 1002 | |
f2341e0a | 1003 | unit_warn_if_dir_nonempty(UNIT(m), m->where); |
4c425434 | 1004 | unit_warn_leftover_processes(UNIT(m), unit_log_leftover_process_start); |
a4634b21 LP |
1005 | |
1006 | m->control_command_id = MOUNT_EXEC_MOUNT; | |
1007 | m->control_command = m->exec_command + MOUNT_EXEC_MOUNT; | |
1008 | ||
cb39ed3f | 1009 | /* Create the source directory for bind-mounts if needed */ |
6b1dc2bd | 1010 | p = get_mount_parameters_fragment(m); |
5dc60faa AP |
1011 | if (p && mount_is_bind(p)) { |
1012 | r = mkdir_p_label(p->what, m->directory_mode); | |
1013 | if (r < 0) | |
1014 | log_unit_error_errno(UNIT(m), r, "Failed to make bind mount source '%s': %m", p->what); | |
1015 | } | |
5261ba90 | 1016 | |
b294b79f | 1017 | if (p) { |
17a1c597 ZJS |
1018 | _cleanup_free_ char *opts = NULL; |
1019 | ||
b294b79f | 1020 | r = fstab_filter_options(p->options, "nofail\0" "noauto\0" "auto\0", NULL, NULL, &opts); |
17a1c597 ZJS |
1021 | if (r < 0) |
1022 | goto fail; | |
1023 | ||
b294b79f | 1024 | r = exec_command_set(m->control_command, MOUNT_PATH, p->what, m->where, NULL); |
e86b3761 ZJS |
1025 | if (r >= 0 && m->sloppy_options) |
1026 | r = exec_command_append(m->control_command, "-s", NULL); | |
c600357b MH |
1027 | if (r >= 0 && m->read_write_only) |
1028 | r = exec_command_append(m->control_command, "-w", NULL); | |
b294b79f MO |
1029 | if (r >= 0 && p->fstype) |
1030 | r = exec_command_append(m->control_command, "-t", p->fstype, NULL); | |
0c47569a | 1031 | if (r >= 0 && !isempty(opts)) |
17a1c597 | 1032 | r = exec_command_append(m->control_command, "-o", opts, NULL); |
e86b3761 | 1033 | } else |
e537352b | 1034 | r = -ENOENT; |
e537352b LP |
1035 | if (r < 0) |
1036 | goto fail; | |
1037 | ||
a16e1123 | 1038 | mount_unwatch_control_pid(m); |
5e94833f | 1039 | |
257f1d8e LP |
1040 | r = mount_spawn(m, m->control_command, &m->control_pid); |
1041 | if (r < 0) | |
e537352b LP |
1042 | goto fail; |
1043 | ||
1044 | mount_set_state(m, MOUNT_MOUNTING); | |
1045 | ||
1046 | return; | |
1047 | ||
1048 | fail: | |
f2341e0a | 1049 | log_unit_warning_errno(UNIT(m), r, "Failed to run 'mount' task: %m"); |
22af0e58 | 1050 | mount_enter_dead_or_mounted(m, MOUNT_FAILURE_RESOURCES); |
e537352b LP |
1051 | } |
1052 | ||
850b7410 LP |
1053 | static void mount_set_reload_result(Mount *m, MountResult result) { |
1054 | assert(m); | |
1055 | ||
1056 | /* Only store the first error we encounter */ | |
1057 | if (m->reload_result != MOUNT_SUCCESS) | |
1058 | return; | |
1059 | ||
1060 | m->reload_result = result; | |
1061 | } | |
1062 | ||
9d2f5178 | 1063 | static void mount_enter_remounting(Mount *m) { |
e537352b | 1064 | int r; |
b294b79f | 1065 | MountParameters *p; |
e537352b LP |
1066 | |
1067 | assert(m); | |
1068 | ||
850b7410 LP |
1069 | /* Reset reload result when we are about to start a new remount operation */ |
1070 | m->reload_result = MOUNT_SUCCESS; | |
1071 | ||
a16e1123 LP |
1072 | m->control_command_id = MOUNT_EXEC_REMOUNT; |
1073 | m->control_command = m->exec_command + MOUNT_EXEC_REMOUNT; | |
e537352b | 1074 | |
b294b79f MO |
1075 | p = get_mount_parameters_fragment(m); |
1076 | if (p) { | |
e537352b LP |
1077 | const char *o; |
1078 | ||
b294b79f MO |
1079 | if (p->options) |
1080 | o = strjoina("remount,", p->options); | |
718db961 | 1081 | else |
e537352b LP |
1082 | o = "remount"; |
1083 | ||
f00929ad | 1084 | r = exec_command_set(m->control_command, MOUNT_PATH, |
b294b79f | 1085 | p->what, m->where, |
e86b3761 | 1086 | "-o", o, NULL); |
e86b3761 ZJS |
1087 | if (r >= 0 && m->sloppy_options) |
1088 | r = exec_command_append(m->control_command, "-s", NULL); | |
c600357b MH |
1089 | if (r >= 0 && m->read_write_only) |
1090 | r = exec_command_append(m->control_command, "-w", NULL); | |
b294b79f MO |
1091 | if (r >= 0 && p->fstype) |
1092 | r = exec_command_append(m->control_command, "-t", p->fstype, NULL); | |
6b1dc2bd | 1093 | } else |
e537352b | 1094 | r = -ENOENT; |
60b912f6 | 1095 | if (r < 0) |
e537352b | 1096 | goto fail; |
e537352b | 1097 | |
a16e1123 | 1098 | mount_unwatch_control_pid(m); |
5e94833f | 1099 | |
718db961 LP |
1100 | r = mount_spawn(m, m->control_command, &m->control_pid); |
1101 | if (r < 0) | |
e537352b LP |
1102 | goto fail; |
1103 | ||
1104 | mount_set_state(m, MOUNT_REMOUNTING); | |
1105 | ||
1106 | return; | |
1107 | ||
1108 | fail: | |
f2341e0a | 1109 | log_unit_warning_errno(UNIT(m), r, "Failed to run 'remount' task: %m"); |
850b7410 | 1110 | mount_set_reload_result(m, MOUNT_FAILURE_RESOURCES); |
22af0e58 | 1111 | mount_enter_dead_or_mounted(m, MOUNT_SUCCESS); |
e537352b LP |
1112 | } |
1113 | ||
7eba1463 LP |
1114 | static void mount_cycle_clear(Mount *m) { |
1115 | assert(m); | |
1116 | ||
1117 | /* Clear all state we shall forget for this new cycle */ | |
1118 | ||
1119 | m->result = MOUNT_SUCCESS; | |
1120 | m->reload_result = MOUNT_SUCCESS; | |
1121 | exec_command_reset_status_array(m->exec_command, _MOUNT_EXEC_COMMAND_MAX); | |
1122 | UNIT(m)->reset_accounting = true; | |
1123 | } | |
1124 | ||
e537352b LP |
1125 | static int mount_start(Unit *u) { |
1126 | Mount *m = MOUNT(u); | |
07299350 | 1127 | int r; |
e537352b LP |
1128 | |
1129 | assert(m); | |
1130 | ||
1131 | /* We cannot fulfill this request right now, try again later | |
1132 | * please! */ | |
f2aed307 LP |
1133 | if (IN_SET(m->state, |
1134 | MOUNT_UNMOUNTING, | |
1135 | MOUNT_UNMOUNTING_SIGTERM, | |
17e9d53d YW |
1136 | MOUNT_UNMOUNTING_SIGKILL, |
1137 | MOUNT_CLEANING)) | |
e537352b LP |
1138 | return -EAGAIN; |
1139 | ||
1140 | /* Already on it! */ | |
db39a627 | 1141 | if (IN_SET(m->state, MOUNT_MOUNTING, MOUNT_MOUNTING_DONE)) |
e537352b LP |
1142 | return 0; |
1143 | ||
f2aed307 | 1144 | assert(IN_SET(m->state, MOUNT_DEAD, MOUNT_FAILED)); |
e537352b | 1145 | |
97a3f4ee | 1146 | r = unit_test_start_limit(u); |
07299350 LP |
1147 | if (r < 0) { |
1148 | mount_enter_dead(m, MOUNT_FAILURE_START_LIMIT_HIT); | |
1149 | return r; | |
1150 | } | |
1151 | ||
4b58153d LP |
1152 | r = unit_acquire_invocation_id(u); |
1153 | if (r < 0) | |
1154 | return r; | |
1155 | ||
7eba1463 | 1156 | mount_cycle_clear(m); |
8d567588 | 1157 | mount_enter_mounting(m); |
7eba1463 | 1158 | |
82a2b6bb | 1159 | return 1; |
e537352b LP |
1160 | } |
1161 | ||
1162 | static int mount_stop(Unit *u) { | |
1163 | Mount *m = MOUNT(u); | |
1164 | ||
1165 | assert(m); | |
1166 | ||
22af0e58 LP |
1167 | switch (m->state) { |
1168 | ||
1169 | case MOUNT_UNMOUNTING: | |
1170 | case MOUNT_UNMOUNTING_SIGKILL: | |
1171 | case MOUNT_UNMOUNTING_SIGTERM: | |
1172 | /* Already on it */ | |
e537352b LP |
1173 | return 0; |
1174 | ||
22af0e58 LP |
1175 | case MOUNT_MOUNTING: |
1176 | case MOUNT_MOUNTING_DONE: | |
1177 | case MOUNT_REMOUNTING: | |
1178 | /* If we are still waiting for /bin/mount, we go directly into kill mode. */ | |
1179 | mount_enter_signal(m, MOUNT_UNMOUNTING_SIGTERM, MOUNT_SUCCESS); | |
1180 | return 0; | |
e537352b | 1181 | |
22af0e58 LP |
1182 | case MOUNT_REMOUNTING_SIGTERM: |
1183 | /* If we are already waiting for a hung remount, convert this to the matching unmounting state */ | |
1184 | mount_set_state(m, MOUNT_UNMOUNTING_SIGTERM); | |
1185 | return 0; | |
1186 | ||
1187 | case MOUNT_REMOUNTING_SIGKILL: | |
1188 | /* as above */ | |
1189 | mount_set_state(m, MOUNT_UNMOUNTING_SIGKILL); | |
1190 | return 0; | |
1191 | ||
1192 | case MOUNT_MOUNTED: | |
1193 | mount_enter_unmounting(m); | |
1194 | return 1; | |
1195 | ||
17e9d53d YW |
1196 | case MOUNT_CLEANING: |
1197 | /* If we are currently cleaning, then abort it, brutally. */ | |
1198 | mount_enter_signal(m, MOUNT_UNMOUNTING_SIGKILL, MOUNT_SUCCESS); | |
1199 | return 0; | |
1200 | ||
22af0e58 LP |
1201 | default: |
1202 | assert_not_reached("Unexpected state."); | |
1203 | } | |
e537352b LP |
1204 | } |
1205 | ||
1206 | static int mount_reload(Unit *u) { | |
1207 | Mount *m = MOUNT(u); | |
1208 | ||
1209 | assert(m); | |
e537352b LP |
1210 | assert(m->state == MOUNT_MOUNTED); |
1211 | ||
9d2f5178 | 1212 | mount_enter_remounting(m); |
22af0e58 | 1213 | |
2d018ae2 | 1214 | return 1; |
e537352b LP |
1215 | } |
1216 | ||
a16e1123 LP |
1217 | static int mount_serialize(Unit *u, FILE *f, FDSet *fds) { |
1218 | Mount *m = MOUNT(u); | |
1219 | ||
1220 | assert(m); | |
1221 | assert(f); | |
1222 | assert(fds); | |
1223 | ||
d68c645b LP |
1224 | (void) serialize_item(f, "state", mount_state_to_string(m->state)); |
1225 | (void) serialize_item(f, "result", mount_result_to_string(m->result)); | |
1226 | (void) serialize_item(f, "reload-result", mount_result_to_string(m->reload_result)); | |
2c09fb81 | 1227 | (void) serialize_item_format(f, "n-retry-umount", "%u", m->n_retry_umount); |
a16e1123 LP |
1228 | |
1229 | if (m->control_pid > 0) | |
d68c645b | 1230 | (void) serialize_item_format(f, "control-pid", PID_FMT, m->control_pid); |
a16e1123 LP |
1231 | |
1232 | if (m->control_command_id >= 0) | |
d68c645b | 1233 | (void) serialize_item(f, "control-command", mount_exec_command_to_string(m->control_command_id)); |
a16e1123 LP |
1234 | |
1235 | return 0; | |
1236 | } | |
1237 | ||
1238 | static int mount_deserialize_item(Unit *u, const char *key, const char *value, FDSet *fds) { | |
1239 | Mount *m = MOUNT(u); | |
2c09fb81 | 1240 | int r; |
a16e1123 LP |
1241 | |
1242 | assert(u); | |
1243 | assert(key); | |
1244 | assert(value); | |
1245 | assert(fds); | |
1246 | ||
1247 | if (streq(key, "state")) { | |
1248 | MountState state; | |
1249 | ||
1250 | if ((state = mount_state_from_string(value)) < 0) | |
f2341e0a | 1251 | log_unit_debug(u, "Failed to parse state value: %s", value); |
a16e1123 LP |
1252 | else |
1253 | m->deserialized_state = state; | |
2c09fb81 | 1254 | |
9d2f5178 LP |
1255 | } else if (streq(key, "result")) { |
1256 | MountResult f; | |
a16e1123 | 1257 | |
9d2f5178 LP |
1258 | f = mount_result_from_string(value); |
1259 | if (f < 0) | |
f2341e0a | 1260 | log_unit_debug(u, "Failed to parse result value: %s", value); |
9d2f5178 LP |
1261 | else if (f != MOUNT_SUCCESS) |
1262 | m->result = f; | |
1263 | ||
1264 | } else if (streq(key, "reload-result")) { | |
1265 | MountResult f; | |
1266 | ||
1267 | f = mount_result_from_string(value); | |
1268 | if (f < 0) | |
f2341e0a | 1269 | log_unit_debug(u, "Failed to parse reload result value: %s", value); |
9d2f5178 LP |
1270 | else if (f != MOUNT_SUCCESS) |
1271 | m->reload_result = f; | |
a16e1123 | 1272 | |
2c09fb81 LP |
1273 | } else if (streq(key, "n-retry-umount")) { |
1274 | ||
1275 | r = safe_atou(value, &m->n_retry_umount); | |
1276 | if (r < 0) | |
1277 | log_unit_debug(u, "Failed to parse n-retry-umount value: %s", value); | |
1278 | ||
a16e1123 | 1279 | } else if (streq(key, "control-pid")) { |
a16e1123 | 1280 | |
3f459cd9 | 1281 | if (parse_pid(value, &m->control_pid) < 0) |
f2341e0a | 1282 | log_unit_debug(u, "Failed to parse control-pid value: %s", value); |
3f459cd9 | 1283 | |
a16e1123 LP |
1284 | } else if (streq(key, "control-command")) { |
1285 | MountExecCommand id; | |
1286 | ||
f2341e0a LP |
1287 | id = mount_exec_command_from_string(value); |
1288 | if (id < 0) | |
1289 | log_unit_debug(u, "Failed to parse exec-command value: %s", value); | |
a16e1123 LP |
1290 | else { |
1291 | m->control_command_id = id; | |
1292 | m->control_command = m->exec_command + id; | |
1293 | } | |
a16e1123 | 1294 | } else |
f2341e0a | 1295 | log_unit_debug(u, "Unknown serialization key: %s", key); |
a16e1123 LP |
1296 | |
1297 | return 0; | |
1298 | } | |
1299 | ||
44a6b1b6 | 1300 | _pure_ static UnitActiveState mount_active_state(Unit *u) { |
e537352b LP |
1301 | assert(u); |
1302 | ||
1303 | return state_translation_table[MOUNT(u)->state]; | |
1304 | } | |
1305 | ||
44a6b1b6 | 1306 | _pure_ static const char *mount_sub_state_to_string(Unit *u) { |
10a94420 LP |
1307 | assert(u); |
1308 | ||
a16e1123 | 1309 | return mount_state_to_string(MOUNT(u)->state); |
10a94420 LP |
1310 | } |
1311 | ||
f2f725e5 | 1312 | _pure_ static bool mount_may_gc(Unit *u) { |
701cc384 LP |
1313 | Mount *m = MOUNT(u); |
1314 | ||
1315 | assert(m); | |
1316 | ||
f2f725e5 ZJS |
1317 | if (m->from_proc_self_mountinfo) |
1318 | return false; | |
1319 | ||
1320 | return true; | |
701cc384 LP |
1321 | } |
1322 | ||
e537352b LP |
1323 | static void mount_sigchld_event(Unit *u, pid_t pid, int code, int status) { |
1324 | Mount *m = MOUNT(u); | |
9d2f5178 | 1325 | MountResult f; |
e537352b LP |
1326 | |
1327 | assert(m); | |
1328 | assert(pid >= 0); | |
1329 | ||
8c47c732 LP |
1330 | if (pid != m->control_pid) |
1331 | return; | |
e537352b | 1332 | |
35080486 LP |
1333 | /* So here's the thing, we really want to know before /usr/bin/mount or /usr/bin/umount exit whether |
1334 | * they established/remove a mount. This is important when mounting, but even more so when unmounting | |
1335 | * since we need to deal with nested mounts and otherwise cannot safely determine whether to repeat | |
1336 | * the unmounts. In theory, the kernel fires /proc/self/mountinfo changes off before returning from | |
1337 | * the mount() or umount() syscalls, and thus we should see the changes to the proc file before we | |
1338 | * process the waitid() for the /usr/bin/(u)mount processes. However, this is unfortunately racy: we | |
1339 | * have to waitid() for processes using P_ALL (since we need to reap unexpected children that got | |
1340 | * reparented to PID 1), but when using P_ALL we might end up reaping processes that terminated just | |
1341 | * instants ago, i.e. already after our last event loop iteration (i.e. after the last point we might | |
1342 | * have noticed /proc/self/mountinfo events via epoll). This means event loop priorities for | |
1343 | * processing SIGCHLD vs. /proc/self/mountinfo IO events are not as relevant as we want. To fix that | |
1344 | * race, let's explicitly scan /proc/self/mountinfo before we start processing /usr/bin/(u)mount | |
1345 | * dying. It's ugly, but it makes our ordering systematic again, and makes sure we always see | |
1346 | * /proc/self/mountinfo changes before our mount/umount exits. */ | |
1347 | (void) mount_process_proc_self_mountinfo(u->manager); | |
1348 | ||
e537352b LP |
1349 | m->control_pid = 0; |
1350 | ||
1f0958f6 | 1351 | if (is_clean_exit(code, status, EXIT_CLEAN_COMMAND, NULL)) |
9d2f5178 LP |
1352 | f = MOUNT_SUCCESS; |
1353 | else if (code == CLD_EXITED) | |
1354 | f = MOUNT_FAILURE_EXIT_CODE; | |
1355 | else if (code == CLD_KILLED) | |
1356 | f = MOUNT_FAILURE_SIGNAL; | |
1357 | else if (code == CLD_DUMPED) | |
1358 | f = MOUNT_FAILURE_CORE_DUMP; | |
1359 | else | |
1360 | assert_not_reached("Unknown code"); | |
1361 | ||
850b7410 LP |
1362 | if (IN_SET(m->state, MOUNT_REMOUNTING, MOUNT_REMOUNTING_SIGKILL, MOUNT_REMOUNTING_SIGTERM)) |
1363 | mount_set_reload_result(m, f); | |
1364 | else if (m->result == MOUNT_SUCCESS) | |
9d2f5178 | 1365 | m->result = f; |
8c47c732 | 1366 | |
a16e1123 | 1367 | if (m->control_command) { |
6ea832a2 | 1368 | exec_status_exit(&m->control_command->exec_status, &m->exec_context, pid, code, status); |
9d2f5178 | 1369 | |
a16e1123 LP |
1370 | m->control_command = NULL; |
1371 | m->control_command_id = _MOUNT_EXEC_COMMAND_INVALID; | |
1372 | } | |
1373 | ||
91bbd9b7 | 1374 | unit_log_process_exit( |
5cc2cd1c | 1375 | u, |
91bbd9b7 LP |
1376 | "Mount process", |
1377 | mount_exec_command_to_string(m->control_command_id), | |
5cc2cd1c | 1378 | f == MOUNT_SUCCESS, |
91bbd9b7 | 1379 | code, status); |
e537352b | 1380 | |
006aabbd AJ |
1381 | /* Note that due to the io event priority logic, we can be sure the new mountinfo is loaded |
1382 | * before we process the SIGCHLD for the mount command. */ | |
e537352b LP |
1383 | |
1384 | switch (m->state) { | |
1385 | ||
1386 | case MOUNT_MOUNTING: | |
006aabbd | 1387 | /* Our mount point has not appeared in mountinfo. Something went wrong. */ |
e537352b | 1388 | |
006aabbd AJ |
1389 | if (f == MOUNT_SUCCESS) { |
1390 | /* Either /bin/mount has an unexpected definition of success, | |
1391 | * or someone raced us and we lost. */ | |
1392 | log_unit_warning(UNIT(m), "Mount process finished, but there is no mount."); | |
1393 | f = MOUNT_FAILURE_PROTOCOL; | |
1394 | } | |
1395 | mount_enter_dead(m, f); | |
1396 | break; | |
1397 | ||
1398 | case MOUNT_MOUNTING_DONE: | |
1399 | mount_enter_mounted(m, f); | |
e537352b LP |
1400 | break; |
1401 | ||
e2f3b44c | 1402 | case MOUNT_REMOUNTING: |
e2f3b44c | 1403 | case MOUNT_REMOUNTING_SIGTERM: |
22af0e58 LP |
1404 | case MOUNT_REMOUNTING_SIGKILL: |
1405 | mount_enter_dead_or_mounted(m, MOUNT_SUCCESS); | |
e2f3b44c LP |
1406 | break; |
1407 | ||
e537352b | 1408 | case MOUNT_UNMOUNTING: |
e537352b | 1409 | |
3cc96856 | 1410 | if (f == MOUNT_SUCCESS && m->from_proc_self_mountinfo) { |
22af0e58 LP |
1411 | |
1412 | /* Still a mount point? If so, let's try again. Most likely there were multiple mount points | |
57018361 AJ |
1413 | * stacked on top of each other. We might exceed the timeout specified by the user overall, |
1414 | * but we will stop as soon as any one umount times out. */ | |
22af0e58 LP |
1415 | |
1416 | if (m->n_retry_umount < RETRY_UMOUNT_MAX) { | |
1417 | log_unit_debug(u, "Mount still present, trying again."); | |
1418 | m->n_retry_umount++; | |
1419 | mount_enter_unmounting(m); | |
1420 | } else { | |
006aabbd | 1421 | log_unit_warning(u, "Mount still present after %u attempts to unmount, giving up.", m->n_retry_umount); |
22af0e58 LP |
1422 | mount_enter_mounted(m, f); |
1423 | } | |
1424 | } else | |
3cc96856 | 1425 | mount_enter_dead_or_mounted(m, f); |
22af0e58 | 1426 | |
e537352b | 1427 | break; |
57018361 AJ |
1428 | |
1429 | case MOUNT_UNMOUNTING_SIGKILL: | |
1430 | case MOUNT_UNMOUNTING_SIGTERM: | |
1431 | mount_enter_dead_or_mounted(m, f); | |
1432 | break; | |
e537352b | 1433 | |
17e9d53d YW |
1434 | case MOUNT_CLEANING: |
1435 | if (m->clean_result == MOUNT_SUCCESS) | |
1436 | m->clean_result = f; | |
1437 | ||
1438 | mount_enter_dead(m, MOUNT_SUCCESS); | |
1439 | break; | |
1440 | ||
e537352b LP |
1441 | default: |
1442 | assert_not_reached("Uh, control process died at wrong time."); | |
1443 | } | |
c4e2ceae LP |
1444 | |
1445 | /* Notify clients about changed exit status */ | |
1446 | unit_add_to_dbus_queue(u); | |
e537352b LP |
1447 | } |
1448 | ||
718db961 LP |
1449 | static int mount_dispatch_timer(sd_event_source *source, usec_t usec, void *userdata) { |
1450 | Mount *m = MOUNT(userdata); | |
e537352b LP |
1451 | |
1452 | assert(m); | |
718db961 | 1453 | assert(m->timer_event_source == source); |
e537352b LP |
1454 | |
1455 | switch (m->state) { | |
1456 | ||
1457 | case MOUNT_MOUNTING: | |
1458 | case MOUNT_MOUNTING_DONE: | |
22af0e58 LP |
1459 | log_unit_warning(UNIT(m), "Mounting timed out. Terminating."); |
1460 | mount_enter_signal(m, MOUNT_UNMOUNTING_SIGTERM, MOUNT_FAILURE_TIMEOUT); | |
e537352b LP |
1461 | break; |
1462 | ||
1463 | case MOUNT_REMOUNTING: | |
79aafbd1 | 1464 | log_unit_warning(UNIT(m), "Remounting timed out. Terminating remount process."); |
22af0e58 LP |
1465 | mount_set_reload_result(m, MOUNT_FAILURE_TIMEOUT); |
1466 | mount_enter_signal(m, MOUNT_REMOUNTING_SIGTERM, MOUNT_SUCCESS); | |
e537352b LP |
1467 | break; |
1468 | ||
22af0e58 LP |
1469 | case MOUNT_REMOUNTING_SIGTERM: |
1470 | mount_set_reload_result(m, MOUNT_FAILURE_TIMEOUT); | |
e537352b | 1471 | |
4819ff03 | 1472 | if (m->kill_context.send_sigkill) { |
22af0e58 LP |
1473 | log_unit_warning(UNIT(m), "Remounting timed out. Killing."); |
1474 | mount_enter_signal(m, MOUNT_REMOUNTING_SIGKILL, MOUNT_SUCCESS); | |
ba035df2 | 1475 | } else { |
22af0e58 LP |
1476 | log_unit_warning(UNIT(m), "Remounting timed out. Skipping SIGKILL. Ignoring."); |
1477 | mount_enter_dead_or_mounted(m, MOUNT_SUCCESS); | |
ba035df2 | 1478 | } |
e537352b LP |
1479 | break; |
1480 | ||
22af0e58 LP |
1481 | case MOUNT_REMOUNTING_SIGKILL: |
1482 | mount_set_reload_result(m, MOUNT_FAILURE_TIMEOUT); | |
ba035df2 | 1483 | |
22af0e58 LP |
1484 | log_unit_warning(UNIT(m), "Mount process still around after SIGKILL. Ignoring."); |
1485 | mount_enter_dead_or_mounted(m, MOUNT_SUCCESS); | |
1486 | break; | |
1487 | ||
1488 | case MOUNT_UNMOUNTING: | |
79aafbd1 | 1489 | log_unit_warning(UNIT(m), "Unmounting timed out. Terminating."); |
22af0e58 | 1490 | mount_enter_signal(m, MOUNT_UNMOUNTING_SIGTERM, MOUNT_FAILURE_TIMEOUT); |
e537352b LP |
1491 | break; |
1492 | ||
1493 | case MOUNT_UNMOUNTING_SIGTERM: | |
4819ff03 | 1494 | if (m->kill_context.send_sigkill) { |
22af0e58 | 1495 | log_unit_warning(UNIT(m), "Mount process timed out. Killing."); |
9d2f5178 | 1496 | mount_enter_signal(m, MOUNT_UNMOUNTING_SIGKILL, MOUNT_FAILURE_TIMEOUT); |
ba035df2 | 1497 | } else { |
22af0e58 LP |
1498 | log_unit_warning(UNIT(m), "Mount process timed out. Skipping SIGKILL. Ignoring."); |
1499 | mount_enter_dead_or_mounted(m, MOUNT_FAILURE_TIMEOUT); | |
ba035df2 | 1500 | } |
e537352b LP |
1501 | break; |
1502 | ||
e537352b | 1503 | case MOUNT_UNMOUNTING_SIGKILL: |
22af0e58 LP |
1504 | log_unit_warning(UNIT(m), "Mount process still around after SIGKILL. Ignoring."); |
1505 | mount_enter_dead_or_mounted(m, MOUNT_FAILURE_TIMEOUT); | |
e537352b LP |
1506 | break; |
1507 | ||
17e9d53d YW |
1508 | case MOUNT_CLEANING: |
1509 | log_unit_warning(UNIT(m), "Cleaning timed out. killing."); | |
1510 | ||
1511 | if (m->clean_result == MOUNT_SUCCESS) | |
1512 | m->clean_result = MOUNT_FAILURE_TIMEOUT; | |
1513 | ||
1514 | mount_enter_signal(m, MOUNT_UNMOUNTING_SIGKILL, 0); | |
1515 | break; | |
1516 | ||
e537352b LP |
1517 | default: |
1518 | assert_not_reached("Timeout at wrong time."); | |
1519 | } | |
718db961 LP |
1520 | |
1521 | return 0; | |
e537352b LP |
1522 | } |
1523 | ||
03b8cfed | 1524 | static int mount_setup_new_unit( |
839ee058 LP |
1525 | Manager *m, |
1526 | const char *name, | |
03b8cfed FB |
1527 | const char *what, |
1528 | const char *where, | |
1529 | const char *options, | |
1530 | const char *fstype, | |
ec88d1ea | 1531 | MountProcFlags *ret_flags, |
839ee058 | 1532 | Unit **ret) { |
03b8cfed | 1533 | |
839ee058 | 1534 | _cleanup_(unit_freep) Unit *u = NULL; |
bbee24bc | 1535 | int r; |
03b8cfed | 1536 | |
839ee058 LP |
1537 | assert(m); |
1538 | assert(name); | |
ec88d1ea | 1539 | assert(ret_flags); |
839ee058 LP |
1540 | assert(ret); |
1541 | ||
1542 | r = unit_new_for_name(m, sizeof(Mount), name, &u); | |
1543 | if (r < 0) | |
1544 | return r; | |
03b8cfed | 1545 | |
e10fe042 LP |
1546 | r = free_and_strdup(&u->source_path, "/proc/self/mountinfo"); |
1547 | if (r < 0) | |
1548 | return r; | |
03b8cfed | 1549 | |
e10fe042 LP |
1550 | r = free_and_strdup(&MOUNT(u)->where, where); |
1551 | if (r < 0) | |
1552 | return r; | |
03b8cfed | 1553 | |
9ddaa3e4 | 1554 | r = update_parameters_proc_self_mountinfo(MOUNT(u), what, options, fstype); |
bbee24bc LP |
1555 | if (r < 0) |
1556 | return r; | |
03b8cfed | 1557 | |
6d7e89b0 LP |
1558 | /* This unit was generated because /proc/self/mountinfo reported it. Remember this, so that by the time we load |
1559 | * the unit file for it (and thus add in extra deps right after) we know what source to attributes the deps | |
1560 | * to.*/ | |
1561 | MOUNT(u)->from_proc_self_mountinfo = true; | |
1562 | ||
1563 | /* We have only allocated the stub now, let's enqueue this unit for loading now, so that everything else is | |
1564 | * loaded in now. */ | |
cfcd4318 | 1565 | unit_add_to_load_queue(u); |
26e35b16 | 1566 | |
ec88d1ea | 1567 | *ret_flags = MOUNT_PROC_IS_MOUNTED | MOUNT_PROC_JUST_MOUNTED | MOUNT_PROC_JUST_CHANGED; |
839ee058 | 1568 | *ret = TAKE_PTR(u); |
03b8cfed FB |
1569 | return 0; |
1570 | } | |
1571 | ||
1572 | static int mount_setup_existing_unit( | |
1573 | Unit *u, | |
1574 | const char *what, | |
1575 | const char *where, | |
1576 | const char *options, | |
1577 | const char *fstype, | |
ec88d1ea | 1578 | MountProcFlags *ret_flags) { |
03b8cfed | 1579 | |
bbee24bc | 1580 | int r; |
03b8cfed FB |
1581 | |
1582 | assert(u); | |
4bb68f2f | 1583 | assert(ret_flags); |
03b8cfed FB |
1584 | |
1585 | if (!MOUNT(u)->where) { | |
1586 | MOUNT(u)->where = strdup(where); | |
1587 | if (!MOUNT(u)->where) | |
1588 | return -ENOMEM; | |
1589 | } | |
1590 | ||
4bb68f2f LP |
1591 | /* In case we have multiple mounts established on the same mount point, let's merge flags set already |
1592 | * for the current unit. Note that the flags field is reset on each iteration of reading | |
1593 | * /proc/self/mountinfo, hence we know for sure anything already set here is from the current | |
1594 | * iteration and thus worthy of taking into account. */ | |
1595 | MountProcFlags flags = | |
1596 | MOUNT(u)->proc_flags | MOUNT_PROC_IS_MOUNTED; | |
1597 | ||
9ddaa3e4 | 1598 | r = update_parameters_proc_self_mountinfo(MOUNT(u), what, options, fstype); |
bbee24bc LP |
1599 | if (r < 0) |
1600 | return r; | |
ec88d1ea LP |
1601 | if (r > 0) |
1602 | flags |= MOUNT_PROC_JUST_CHANGED; | |
03b8cfed | 1603 | |
4bb68f2f LP |
1604 | /* There are two conditions when we consider a mount point just mounted: when we haven't seen it in |
1605 | * /proc/self/mountinfo before or when MOUNT_MOUNTING is our current state. Why bother with the | |
1606 | * latter? Shouldn't that be covered by the former? No, during reload it is not because we might then | |
1607 | * encounter a new /proc/self/mountinfo in combination with an old mount unit state (since it stems | |
1608 | * from the serialized state), and need to catch up. Since we know that the MOUNT_MOUNTING state is | |
1609 | * reached when we wait for the mount to appear we hence can assume that if we are in it, we are | |
1610 | * actually seeing it established for the first time. */ | |
1611 | if (!MOUNT(u)->from_proc_self_mountinfo || MOUNT(u)->state == MOUNT_MOUNTING) | |
ec88d1ea | 1612 | flags |= MOUNT_PROC_JUST_MOUNTED; |
d253a45e YW |
1613 | |
1614 | MOUNT(u)->from_proc_self_mountinfo = true; | |
03b8cfed | 1615 | |
f8064c4f LP |
1616 | if (IN_SET(u->load_state, UNIT_NOT_FOUND, UNIT_BAD_SETTING, UNIT_ERROR)) { |
1617 | /* The unit was previously not found or otherwise not loaded. Now that the unit shows up in | |
1618 | * /proc/self/mountinfo we should reconsider it this, hence set it to UNIT_LOADED. */ | |
03b8cfed FB |
1619 | u->load_state = UNIT_LOADED; |
1620 | u->load_error = 0; | |
1621 | ||
ec88d1ea | 1622 | flags |= MOUNT_PROC_JUST_CHANGED; |
03b8cfed FB |
1623 | } |
1624 | ||
ec88d1ea | 1625 | if (FLAGS_SET(flags, MOUNT_PROC_JUST_CHANGED)) { |
a3742204 LP |
1626 | /* If things changed, then make sure that all deps are regenerated. Let's |
1627 | * first remove all automatic deps, and then add in the new ones. */ | |
1628 | ||
1629 | unit_remove_dependencies(u, UNIT_DEPENDENCY_MOUNTINFO_IMPLICIT); | |
1630 | ||
bf7eedbf | 1631 | r = mount_add_non_exec_dependencies(MOUNT(u)); |
a3742204 LP |
1632 | if (r < 0) |
1633 | return r; | |
1634 | } | |
03b8cfed | 1635 | |
ec88d1ea | 1636 | *ret_flags = flags; |
03b8cfed FB |
1637 | return 0; |
1638 | } | |
1639 | ||
628c89cc | 1640 | static int mount_setup_unit( |
e537352b LP |
1641 | Manager *m, |
1642 | const char *what, | |
1643 | const char *where, | |
1644 | const char *options, | |
1645 | const char *fstype, | |
e537352b | 1646 | bool set_flags) { |
057d9ab8 | 1647 | |
03b8cfed | 1648 | _cleanup_free_ char *e = NULL; |
ec88d1ea | 1649 | MountProcFlags flags; |
057d9ab8 LP |
1650 | Unit *u; |
1651 | int r; | |
b08d03ff | 1652 | |
f50e0a01 | 1653 | assert(m); |
b08d03ff LP |
1654 | assert(what); |
1655 | assert(where); | |
e537352b LP |
1656 | assert(options); |
1657 | assert(fstype); | |
1658 | ||
e537352b LP |
1659 | /* Ignore API mount points. They should never be referenced in |
1660 | * dependencies ever. */ | |
33ff02c9 | 1661 | if (mount_point_is_api(where) || mount_point_ignore(where)) |
57f2a956 | 1662 | return 0; |
b08d03ff | 1663 | |
8d567588 LP |
1664 | if (streq(fstype, "autofs")) |
1665 | return 0; | |
1666 | ||
4e85aff4 LP |
1667 | /* probably some kind of swap, ignore */ |
1668 | if (!is_path(where)) | |
b08d03ff LP |
1669 | return 0; |
1670 | ||
2c905207 LP |
1671 | /* Mount unit names have to be (like all other unit names) short enough to fit into file names. This |
1672 | * means there's a good chance that overly long mount point paths after mangling them to look like a | |
1673 | * unit name would result in unit names we don't actually consider valid. This should be OK however | |
1674 | * as such long mount point paths should not happen on regular systems — and if they appear | |
1675 | * nonetheless they are generally synthesized by software, and thus managed by that other | |
1676 | * software. Having such long names just means you cannot use systemd to manage those specific mount | |
1677 | * points, which should be an OK restriction to make. After all we don't have to be able to manage | |
1678 | * all mount points in the world — as long as we don't choke on them when we encounter them. */ | |
7410616c | 1679 | r = unit_name_from_path(where, ".mount", &e); |
2c905207 LP |
1680 | if (r < 0) { |
1681 | static RateLimit rate_limit = { /* Let's log about this at warning level at most once every | |
1682 | * 5s. Given that we generate this whenever we read the file | |
1683 | * otherwise we probably shouldn't flood the logs with | |
1684 | * this */ | |
1685 | .interval = 5 * USEC_PER_SEC, | |
1686 | .burst = 1, | |
1687 | }; | |
1688 | ||
1689 | return log_struct_errno( | |
1690 | ratelimit_below(&rate_limit) ? LOG_WARNING : LOG_DEBUG, r, | |
1691 | "MESSAGE_ID=" SD_MESSAGE_MOUNT_POINT_PATH_NOT_SUITABLE_STR, | |
1692 | "MOUNT_POINT=%s", where, | |
1693 | LOG_MESSAGE("Failed to generate valid unit name from path '%s', ignoring mount point: %m", where)); | |
1694 | } | |
b08d03ff | 1695 | |
7d17cfbc | 1696 | u = manager_get_unit(m, e); |
839ee058 | 1697 | if (u) |
03b8cfed | 1698 | r = mount_setup_existing_unit(u, what, where, options, fstype, &flags); |
839ee058 LP |
1699 | else |
1700 | /* First time we see this mount point meaning that it's not been initiated by a mount unit but rather | |
1701 | * by the sysadmin having called mount(8) directly. */ | |
1702 | r = mount_setup_new_unit(m, e, what, where, options, fstype, &flags, &u); | |
03b8cfed | 1703 | if (r < 0) |
2c905207 | 1704 | return log_warning_errno(r, "Failed to set up mount unit for '%s': %m", where); |
ff5f34d0 | 1705 | |
ec88d1ea LP |
1706 | /* If the mount changed properties or state, let's notify our clients */ |
1707 | if (flags & (MOUNT_PROC_JUST_CHANGED|MOUNT_PROC_JUST_MOUNTED)) | |
ff5f34d0 | 1708 | unit_add_to_dbus_queue(u); |
c1e1601e | 1709 | |
ec88d1ea LP |
1710 | if (set_flags) |
1711 | MOUNT(u)->proc_flags = flags; | |
1712 | ||
b08d03ff | 1713 | return 0; |
b08d03ff LP |
1714 | } |
1715 | ||
ef734fd6 | 1716 | static int mount_load_proc_self_mountinfo(Manager *m, bool set_flags) { |
13dcfe46 ZJS |
1717 | _cleanup_(mnt_free_tablep) struct libmnt_table *table = NULL; |
1718 | _cleanup_(mnt_free_iterp) struct libmnt_iter *iter = NULL; | |
ba0d56f5 | 1719 | int r; |
b08d03ff LP |
1720 | |
1721 | assert(m); | |
1722 | ||
e2857b3d | 1723 | r = libmount_parse(NULL, NULL, &table, &iter); |
5cca8def | 1724 | if (r < 0) |
628c89cc | 1725 | return log_error_errno(r, "Failed to parse /proc/self/mountinfo: %m"); |
e537352b | 1726 | |
5cca8def | 1727 | for (;;) { |
95b862b0 | 1728 | struct libmnt_fs *fs; |
8d3ae2bd | 1729 | const char *device, *path, *options, *fstype; |
b08d03ff | 1730 | |
13dcfe46 ZJS |
1731 | r = mnt_table_next_fs(table, iter, &fs); |
1732 | if (r == 1) | |
5cca8def | 1733 | break; |
13dcfe46 ZJS |
1734 | if (r < 0) |
1735 | return log_error_errno(r, "Failed to get next entry from /proc/self/mountinfo: %m"); | |
5cca8def | 1736 | |
8d3ae2bd CL |
1737 | device = mnt_fs_get_source(fs); |
1738 | path = mnt_fs_get_target(fs); | |
1739 | options = mnt_fs_get_options(fs); | |
1740 | fstype = mnt_fs_get_fstype(fs); | |
a2e0f3d3 | 1741 | |
c0a7f8d3 DM |
1742 | if (!device || !path) |
1743 | continue; | |
1744 | ||
9d1b2b22 | 1745 | device_found_node(m, device, DEVICE_FOUND_MOUNT, DEVICE_FOUND_MOUNT); |
628c89cc | 1746 | |
9d1b2b22 | 1747 | (void) mount_setup_unit(m, device, path, options, fstype, set_flags); |
b08d03ff LP |
1748 | } |
1749 | ||
ba0d56f5 | 1750 | return 0; |
e537352b LP |
1751 | } |
1752 | ||
1753 | static void mount_shutdown(Manager *m) { | |
1754 | assert(m); | |
1755 | ||
718db961 LP |
1756 | m->mount_event_source = sd_event_source_unref(m->mount_event_source); |
1757 | ||
d379d442 KZ |
1758 | mnt_unref_monitor(m->mount_monitor); |
1759 | m->mount_monitor = NULL; | |
b08d03ff LP |
1760 | } |
1761 | ||
7a7821c8 | 1762 | static int mount_get_timeout(Unit *u, usec_t *timeout) { |
68db7a3b | 1763 | Mount *m = MOUNT(u); |
7a7821c8 | 1764 | usec_t t; |
68db7a3b ZJS |
1765 | int r; |
1766 | ||
1767 | if (!m->timer_event_source) | |
1768 | return 0; | |
1769 | ||
7a7821c8 | 1770 | r = sd_event_source_get_time(m->timer_event_source, &t); |
68db7a3b ZJS |
1771 | if (r < 0) |
1772 | return r; | |
7a7821c8 LP |
1773 | if (t == USEC_INFINITY) |
1774 | return 0; | |
68db7a3b | 1775 | |
7a7821c8 | 1776 | *timeout = t; |
68db7a3b ZJS |
1777 | return 1; |
1778 | } | |
1779 | ||
04eb582a | 1780 | static void mount_enumerate_perpetual(Manager *m) { |
11222d0f LP |
1781 | Unit *u; |
1782 | int r; | |
1783 | ||
1784 | assert(m); | |
1785 | ||
1786 | /* Whatever happens, we know for sure that the root directory is around, and cannot go away. Let's | |
1787 | * unconditionally synthesize it here and mark it as perpetual. */ | |
1788 | ||
1789 | u = manager_get_unit(m, SPECIAL_ROOT_MOUNT); | |
1790 | if (!u) { | |
a581e45a | 1791 | r = unit_new_for_name(m, sizeof(Mount), SPECIAL_ROOT_MOUNT, &u); |
04eb582a LP |
1792 | if (r < 0) { |
1793 | log_error_errno(r, "Failed to allocate the special " SPECIAL_ROOT_MOUNT " unit: %m"); | |
1794 | return; | |
1795 | } | |
11222d0f LP |
1796 | } |
1797 | ||
1798 | u->perpetual = true; | |
1799 | MOUNT(u)->deserialized_state = MOUNT_MOUNTED; | |
1800 | ||
1801 | unit_add_to_load_queue(u); | |
1802 | unit_add_to_dbus_queue(u); | |
1803 | } | |
1804 | ||
1805 | static bool mount_is_mounted(Mount *m) { | |
1806 | assert(m); | |
1807 | ||
ec88d1ea | 1808 | return UNIT(m)->perpetual || FLAGS_SET(m->proc_flags, MOUNT_PROC_IS_MOUNTED); |
11222d0f LP |
1809 | } |
1810 | ||
ba64af90 | 1811 | static void mount_enumerate(Manager *m) { |
b08d03ff | 1812 | int r; |
d379d442 | 1813 | |
b08d03ff LP |
1814 | assert(m); |
1815 | ||
8d3ae2bd CL |
1816 | mnt_init_debug(0); |
1817 | ||
d379d442 KZ |
1818 | if (!m->mount_monitor) { |
1819 | int fd; | |
ef734fd6 | 1820 | |
d379d442 KZ |
1821 | m->mount_monitor = mnt_new_monitor(); |
1822 | if (!m->mount_monitor) { | |
ba64af90 | 1823 | log_oom(); |
718db961 | 1824 | goto fail; |
d379d442 | 1825 | } |
29083707 | 1826 | |
d379d442 | 1827 | r = mnt_monitor_enable_kernel(m->mount_monitor, 1); |
ba64af90 LP |
1828 | if (r < 0) { |
1829 | log_error_errno(r, "Failed to enable watching of kernel mount events: %m"); | |
29083707 | 1830 | goto fail; |
ba64af90 LP |
1831 | } |
1832 | ||
d379d442 | 1833 | r = mnt_monitor_enable_userspace(m->mount_monitor, 1, NULL); |
ba64af90 LP |
1834 | if (r < 0) { |
1835 | log_error_errno(r, "Failed to enable watching of userspace mount events: %m"); | |
f7c1ad4f | 1836 | goto fail; |
ba64af90 | 1837 | } |
90598531 | 1838 | |
d379d442 KZ |
1839 | /* mnt_unref_monitor() will close the fd */ |
1840 | fd = r = mnt_monitor_get_fd(m->mount_monitor); | |
ba64af90 LP |
1841 | if (r < 0) { |
1842 | log_error_errno(r, "Failed to acquire watch file descriptor: %m"); | |
f7c1ad4f | 1843 | goto fail; |
ba64af90 | 1844 | } |
befb6d54 | 1845 | |
d379d442 | 1846 | r = sd_event_add_io(m->event, &m->mount_event_source, fd, EPOLLIN, mount_dispatch_io, m); |
ba64af90 LP |
1847 | if (r < 0) { |
1848 | log_error_errno(r, "Failed to watch mount file descriptor: %m"); | |
befb6d54 | 1849 | goto fail; |
ba64af90 | 1850 | } |
befb6d54 | 1851 | |
83231637 | 1852 | r = sd_event_source_set_priority(m->mount_event_source, SD_EVENT_PRIORITY_NORMAL-10); |
ba64af90 LP |
1853 | if (r < 0) { |
1854 | log_error_errno(r, "Failed to adjust mount watch priority: %m"); | |
befb6d54 | 1855 | goto fail; |
ba64af90 | 1856 | } |
7dfbe2e3 | 1857 | |
d379d442 | 1858 | (void) sd_event_source_set_description(m->mount_event_source, "mount-monitor-dispatch"); |
befb6d54 CL |
1859 | } |
1860 | ||
e62d8c39 ZJS |
1861 | r = mount_load_proc_self_mountinfo(m, false); |
1862 | if (r < 0) | |
b08d03ff LP |
1863 | goto fail; |
1864 | ||
ba64af90 | 1865 | return; |
b08d03ff LP |
1866 | |
1867 | fail: | |
1868 | mount_shutdown(m); | |
5cb5a6ff LP |
1869 | } |
1870 | ||
fcd8e119 LP |
1871 | static int drain_libmount(Manager *m) { |
1872 | bool rescan = false; | |
1873 | int r; | |
1874 | ||
1875 | assert(m); | |
1876 | ||
1877 | /* Drain all events and verify that the event is valid. | |
1878 | * | |
1879 | * Note that libmount also monitors /run/mount mkdir if the directory does not exist yet. The mkdir | |
1880 | * may generate event which is irrelevant for us. | |
1881 | * | |
1882 | * error: r < 0; valid: r == 0, false positive: r == 1 */ | |
1883 | do { | |
1884 | r = mnt_monitor_next_change(m->mount_monitor, NULL, NULL); | |
1885 | if (r < 0) | |
1886 | return log_error_errno(r, "Failed to drain libmount events: %m"); | |
1887 | if (r == 0) | |
1888 | rescan = true; | |
1889 | } while (r == 0); | |
1890 | ||
1891 | return rescan; | |
1892 | } | |
1893 | ||
35080486 | 1894 | static int mount_process_proc_self_mountinfo(Manager *m) { |
ec8126d7 | 1895 | _cleanup_set_free_free_ Set *around = NULL, *gone = NULL; |
ec8126d7 | 1896 | const char *what; |
ec8126d7 | 1897 | Unit *u; |
ef734fd6 LP |
1898 | int r; |
1899 | ||
1900 | assert(m); | |
ef734fd6 | 1901 | |
fcd8e119 LP |
1902 | r = drain_libmount(m); |
1903 | if (r <= 0) | |
1904 | return r; | |
ef734fd6 | 1905 | |
4f0eedb7 ZJS |
1906 | r = mount_load_proc_self_mountinfo(m, true); |
1907 | if (r < 0) { | |
e537352b | 1908 | /* Reset flags, just in case, for later calls */ |
ec88d1ea LP |
1909 | LIST_FOREACH(units_by_type, u, m->units_by_type[UNIT_MOUNT]) |
1910 | MOUNT(u)->proc_flags = 0; | |
e537352b | 1911 | |
ec8126d7 | 1912 | return 0; |
ef734fd6 LP |
1913 | } |
1914 | ||
1915 | manager_dispatch_load_queue(m); | |
1916 | ||
595ed347 MS |
1917 | LIST_FOREACH(units_by_type, u, m->units_by_type[UNIT_MOUNT]) { |
1918 | Mount *mount = MOUNT(u); | |
ef734fd6 | 1919 | |
11222d0f | 1920 | if (!mount_is_mounted(mount)) { |
e537352b | 1921 | |
394763f6 LP |
1922 | /* A mount point is not around right now. It |
1923 | * might be gone, or might never have | |
1924 | * existed. */ | |
1925 | ||
1926 | if (mount->from_proc_self_mountinfo && | |
1927 | mount->parameters_proc_self_mountinfo.what) { | |
1928 | ||
1929 | /* Remember that this device might just have disappeared */ | |
548f6937 | 1930 | if (set_ensure_allocated(&gone, &path_hash_ops) < 0 || |
be327321 | 1931 | set_put_strdup(&gone, mount->parameters_proc_self_mountinfo.what) < 0) |
394763f6 LP |
1932 | log_oom(); /* we don't care too much about OOM here... */ |
1933 | } | |
fcd8b266 | 1934 | |
ef734fd6 | 1935 | mount->from_proc_self_mountinfo = false; |
9ddaa3e4 | 1936 | assert_se(update_parameters_proc_self_mountinfo(mount, NULL, NULL, NULL) >= 0); |
e537352b LP |
1937 | |
1938 | switch (mount->state) { | |
1939 | ||
1940 | case MOUNT_MOUNTED: | |
7eba1463 | 1941 | /* This has just been unmounted by somebody else, follow the state change. */ |
9d2f5178 | 1942 | mount_enter_dead(mount, MOUNT_SUCCESS); |
e537352b LP |
1943 | break; |
1944 | ||
2fa0bd7d YW |
1945 | case MOUNT_MOUNTING_DONE: |
1946 | /* The mount command may add the corresponding proc mountinfo entry and | |
1947 | * then remove it because of an internal error. E.g., fuse.sshfs seems | |
1948 | * to do that when the connection fails. See #17617. To handle such the | |
1949 | * case, let's once set the state back to mounting. Then, the unit can | |
1950 | * correctly enter the failed state later in mount_sigchld(). */ | |
1951 | mount_set_state(mount, MOUNT_MOUNTING); | |
1952 | break; | |
1953 | ||
e537352b | 1954 | default: |
e537352b | 1955 | break; |
e537352b LP |
1956 | } |
1957 | ||
ec88d1ea | 1958 | } else if (mount->proc_flags & (MOUNT_PROC_JUST_MOUNTED|MOUNT_PROC_JUST_CHANGED)) { |
e537352b | 1959 | |
fcd8b266 | 1960 | /* A mount point was added or changed */ |
e537352b LP |
1961 | |
1962 | switch (mount->state) { | |
1963 | ||
1964 | case MOUNT_DEAD: | |
fdf20a31 | 1965 | case MOUNT_FAILED: |
4b58153d LP |
1966 | |
1967 | /* This has just been mounted by somebody else, follow the state change, but let's | |
1968 | * generate a new invocation ID for this implicitly and automatically. */ | |
7eba1463 LP |
1969 | (void) unit_acquire_invocation_id(u); |
1970 | mount_cycle_clear(mount); | |
9d2f5178 | 1971 | mount_enter_mounted(mount, MOUNT_SUCCESS); |
e537352b LP |
1972 | break; |
1973 | ||
1974 | case MOUNT_MOUNTING: | |
5bcb0f2b | 1975 | mount_set_state(mount, MOUNT_MOUNTING_DONE); |
e537352b LP |
1976 | break; |
1977 | ||
1978 | default: | |
1979 | /* Nothing really changed, but let's | |
1980 | * issue an notification call | |
1981 | * nonetheless, in case somebody is | |
1982 | * waiting for this. (e.g. file system | |
1983 | * ro/rw remounts.) */ | |
1984 | mount_set_state(mount, mount->state); | |
1985 | break; | |
1986 | } | |
394763f6 | 1987 | } |
fcd8b266 | 1988 | |
11222d0f | 1989 | if (mount_is_mounted(mount) && |
394763f6 LP |
1990 | mount->from_proc_self_mountinfo && |
1991 | mount->parameters_proc_self_mountinfo.what) { | |
b6418dc9 | 1992 | /* Track devices currently used */ |
fcd8b266 | 1993 | |
548f6937 | 1994 | if (set_ensure_allocated(&around, &path_hash_ops) < 0 || |
be327321 | 1995 | set_put_strdup(&around, mount->parameters_proc_self_mountinfo.what) < 0) |
394763f6 | 1996 | log_oom(); |
e537352b LP |
1997 | } |
1998 | ||
1999 | /* Reset the flags for later calls */ | |
ec88d1ea | 2000 | mount->proc_flags = 0; |
e537352b | 2001 | } |
718db961 | 2002 | |
90e74a66 | 2003 | SET_FOREACH(what, gone) { |
fcd8b266 LP |
2004 | if (set_contains(around, what)) |
2005 | continue; | |
2006 | ||
2007 | /* Let the device units know that the device is no longer mounted */ | |
485ae697 | 2008 | device_found_node(m, what, 0, DEVICE_FOUND_MOUNT); |
fcd8b266 | 2009 | } |
ec8126d7 ZJS |
2010 | |
2011 | return 0; | |
e537352b LP |
2012 | } |
2013 | ||
35080486 LP |
2014 | static int mount_dispatch_io(sd_event_source *source, int fd, uint32_t revents, void *userdata) { |
2015 | Manager *m = userdata; | |
2016 | ||
2017 | assert(m); | |
2018 | assert(revents & EPOLLIN); | |
2019 | ||
2020 | return mount_process_proc_self_mountinfo(m); | |
2021 | } | |
2022 | ||
fdf20a31 | 2023 | static void mount_reset_failed(Unit *u) { |
5632e374 LP |
2024 | Mount *m = MOUNT(u); |
2025 | ||
2026 | assert(m); | |
2027 | ||
fdf20a31 | 2028 | if (m->state == MOUNT_FAILED) |
5632e374 LP |
2029 | mount_set_state(m, MOUNT_DEAD); |
2030 | ||
9d2f5178 LP |
2031 | m->result = MOUNT_SUCCESS; |
2032 | m->reload_result = MOUNT_SUCCESS; | |
17e9d53d | 2033 | m->clean_result = MOUNT_SUCCESS; |
5632e374 LP |
2034 | } |
2035 | ||
718db961 | 2036 | static int mount_kill(Unit *u, KillWho who, int signo, sd_bus_error *error) { |
22af0e58 LP |
2037 | Mount *m = MOUNT(u); |
2038 | ||
2039 | assert(m); | |
2040 | ||
ee36fed4 | 2041 | return unit_kill_common(u, who, signo, -1, m->control_pid, error); |
8a0867d6 LP |
2042 | } |
2043 | ||
291d565a LP |
2044 | static int mount_control_pid(Unit *u) { |
2045 | Mount *m = MOUNT(u); | |
2046 | ||
2047 | assert(m); | |
2048 | ||
2049 | return m->control_pid; | |
2050 | } | |
2051 | ||
17e9d53d YW |
2052 | static int mount_clean(Unit *u, ExecCleanMask mask) { |
2053 | _cleanup_strv_free_ char **l = NULL; | |
2054 | Mount *m = MOUNT(u); | |
2055 | int r; | |
2056 | ||
2057 | assert(m); | |
2058 | assert(mask != 0); | |
2059 | ||
2060 | if (m->state != MOUNT_DEAD) | |
2061 | return -EBUSY; | |
2062 | ||
2063 | r = exec_context_get_clean_directories(&m->exec_context, u->manager->prefix, mask, &l); | |
2064 | if (r < 0) | |
2065 | return r; | |
2066 | ||
2067 | if (strv_isempty(l)) | |
2068 | return -EUNATCH; | |
2069 | ||
2070 | mount_unwatch_control_pid(m); | |
2071 | m->clean_result = MOUNT_SUCCESS; | |
2072 | m->control_command = NULL; | |
2073 | m->control_command_id = _MOUNT_EXEC_COMMAND_INVALID; | |
2074 | ||
2075 | r = mount_arm_timer(m, usec_add(now(CLOCK_MONOTONIC), m->exec_context.timeout_clean_usec)); | |
2076 | if (r < 0) | |
2077 | goto fail; | |
2078 | ||
2079 | r = unit_fork_and_watch_rm_rf(u, l, &m->control_pid); | |
2080 | if (r < 0) | |
2081 | goto fail; | |
2082 | ||
2083 | mount_set_state(m, MOUNT_CLEANING); | |
2084 | ||
2085 | return 0; | |
2086 | ||
2087 | fail: | |
2088 | log_unit_warning_errno(u, r, "Failed to initiate cleaning: %m"); | |
2089 | m->clean_result = MOUNT_FAILURE_RESOURCES; | |
2090 | m->timer_event_source = sd_event_source_unref(m->timer_event_source); | |
2091 | return r; | |
2092 | } | |
2093 | ||
2094 | static int mount_can_clean(Unit *u, ExecCleanMask *ret) { | |
2095 | Mount *m = MOUNT(u); | |
2096 | ||
2097 | assert(m); | |
2098 | ||
2099 | return exec_context_get_clean_mask(&m->exec_context, ret); | |
2100 | } | |
2101 | ||
a16e1123 LP |
2102 | static const char* const mount_exec_command_table[_MOUNT_EXEC_COMMAND_MAX] = { |
2103 | [MOUNT_EXEC_MOUNT] = "ExecMount", | |
2104 | [MOUNT_EXEC_UNMOUNT] = "ExecUnmount", | |
2105 | [MOUNT_EXEC_REMOUNT] = "ExecRemount", | |
2106 | }; | |
2107 | ||
2108 | DEFINE_STRING_TABLE_LOOKUP(mount_exec_command, MountExecCommand); | |
2109 | ||
9d2f5178 LP |
2110 | static const char* const mount_result_table[_MOUNT_RESULT_MAX] = { |
2111 | [MOUNT_SUCCESS] = "success", | |
2112 | [MOUNT_FAILURE_RESOURCES] = "resources", | |
2113 | [MOUNT_FAILURE_TIMEOUT] = "timeout", | |
2114 | [MOUNT_FAILURE_EXIT_CODE] = "exit-code", | |
2115 | [MOUNT_FAILURE_SIGNAL] = "signal", | |
07299350 LP |
2116 | [MOUNT_FAILURE_CORE_DUMP] = "core-dump", |
2117 | [MOUNT_FAILURE_START_LIMIT_HIT] = "start-limit-hit", | |
006aabbd | 2118 | [MOUNT_FAILURE_PROTOCOL] = "protocol", |
9d2f5178 LP |
2119 | }; |
2120 | ||
2121 | DEFINE_STRING_TABLE_LOOKUP(mount_result, MountResult); | |
2122 | ||
87f0e418 | 2123 | const UnitVTable mount_vtable = { |
7d17cfbc | 2124 | .object_size = sizeof(Mount), |
718db961 LP |
2125 | .exec_context_offset = offsetof(Mount, exec_context), |
2126 | .cgroup_context_offset = offsetof(Mount, cgroup_context), | |
2127 | .kill_context_offset = offsetof(Mount, kill_context), | |
613b411c | 2128 | .exec_runtime_offset = offsetof(Mount, exec_runtime), |
29206d46 | 2129 | .dynamic_creds_offset = offsetof(Mount, dynamic_creds), |
3ef63c31 | 2130 | |
f975e971 LP |
2131 | .sections = |
2132 | "Unit\0" | |
2133 | "Mount\0" | |
2134 | "Install\0", | |
4ad49000 | 2135 | .private_section = "Mount", |
71645aca | 2136 | |
c80a9a33 LP |
2137 | .can_transient = true, |
2138 | .can_fail = true, | |
2139 | ||
e537352b LP |
2140 | .init = mount_init, |
2141 | .load = mount_load, | |
034c6ed7 | 2142 | .done = mount_done, |
e537352b | 2143 | |
f50e0a01 LP |
2144 | .coldplug = mount_coldplug, |
2145 | ||
034c6ed7 | 2146 | .dump = mount_dump, |
5cb5a6ff | 2147 | |
e537352b LP |
2148 | .start = mount_start, |
2149 | .stop = mount_stop, | |
2150 | .reload = mount_reload, | |
2151 | ||
8a0867d6 | 2152 | .kill = mount_kill, |
17e9d53d YW |
2153 | .clean = mount_clean, |
2154 | .can_clean = mount_can_clean, | |
8a0867d6 | 2155 | |
a16e1123 LP |
2156 | .serialize = mount_serialize, |
2157 | .deserialize_item = mount_deserialize_item, | |
2158 | ||
f50e0a01 | 2159 | .active_state = mount_active_state, |
10a94420 | 2160 | .sub_state_to_string = mount_sub_state_to_string, |
b08d03ff | 2161 | |
52a12341 YW |
2162 | .will_restart = unit_will_restart_default, |
2163 | ||
f2f725e5 | 2164 | .may_gc = mount_may_gc, |
39c79477 | 2165 | .is_extrinsic = mount_is_extrinsic, |
701cc384 | 2166 | |
e537352b | 2167 | .sigchld_event = mount_sigchld_event, |
e537352b | 2168 | |
fdf20a31 | 2169 | .reset_failed = mount_reset_failed, |
291d565a LP |
2170 | |
2171 | .control_pid = mount_control_pid, | |
5632e374 | 2172 | |
74c964d3 LP |
2173 | .bus_set_property = bus_mount_set_property, |
2174 | .bus_commit_properties = bus_mount_commit_properties, | |
4139c1b2 | 2175 | |
68db7a3b ZJS |
2176 | .get_timeout = mount_get_timeout, |
2177 | ||
04eb582a | 2178 | .enumerate_perpetual = mount_enumerate_perpetual, |
f50e0a01 | 2179 | .enumerate = mount_enumerate, |
c6918296 MS |
2180 | .shutdown = mount_shutdown, |
2181 | ||
2182 | .status_message_formats = { | |
2183 | .starting_stopping = { | |
2184 | [0] = "Mounting %s...", | |
2185 | [1] = "Unmounting %s...", | |
2186 | }, | |
2187 | .finished_start_job = { | |
2188 | [JOB_DONE] = "Mounted %s.", | |
2189 | [JOB_FAILED] = "Failed to mount %s.", | |
c6918296 MS |
2190 | [JOB_TIMEOUT] = "Timed out mounting %s.", |
2191 | }, | |
2192 | .finished_stop_job = { | |
2193 | [JOB_DONE] = "Unmounted %s.", | |
2194 | [JOB_FAILED] = "Failed unmounting %s.", | |
2195 | [JOB_TIMEOUT] = "Timed out unmounting %s.", | |
2196 | }, | |
2197 | }, | |
5cb5a6ff | 2198 | }; |