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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" |
218cfe23 | 16 | #include "fs-util.h" |
4f5dd394 | 17 | #include "fstab-util.h" |
baa6a42d | 18 | #include "initrd-util.h" |
fb36b133 | 19 | #include "libmount-util.h" |
4f5dd394 LP |
20 | #include "log.h" |
21 | #include "manager.h" | |
35cd0ba5 | 22 | #include "mkdir-label.h" |
4f5dd394 LP |
23 | #include "mount-setup.h" |
24 | #include "mount.h" | |
049af8ad | 25 | #include "mountpoint-util.h" |
6bedfcbb | 26 | #include "parse-util.h" |
4f5dd394 | 27 | #include "path-util.h" |
7b3e062c | 28 | #include "process-util.h" |
d68c645b | 29 | #include "serialize.h" |
4f5dd394 | 30 | #include "special.h" |
218cfe23 | 31 | #include "stat-util.h" |
8b43440b | 32 | #include "string-table.h" |
b5efdb8a | 33 | #include "string-util.h" |
4f5dd394 LP |
34 | #include "strv.h" |
35 | #include "unit-name.h" | |
36 | #include "unit.h" | |
5cb5a6ff | 37 | |
7d54a03a LP |
38 | #define RETRY_UMOUNT_MAX 32 |
39 | ||
f50e0a01 LP |
40 | static const UnitActiveState state_translation_table[_MOUNT_STATE_MAX] = { |
41 | [MOUNT_DEAD] = UNIT_INACTIVE, | |
42 | [MOUNT_MOUNTING] = UNIT_ACTIVATING, | |
b6ba0c16 | 43 | [MOUNT_MOUNTING_DONE] = UNIT_ACTIVATING, |
f50e0a01 | 44 | [MOUNT_MOUNTED] = UNIT_ACTIVE, |
032ff4af | 45 | [MOUNT_REMOUNTING] = UNIT_RELOADING, |
f50e0a01 | 46 | [MOUNT_UNMOUNTING] = UNIT_DEACTIVATING, |
032ff4af LP |
47 | [MOUNT_REMOUNTING_SIGTERM] = UNIT_RELOADING, |
48 | [MOUNT_REMOUNTING_SIGKILL] = UNIT_RELOADING, | |
e537352b LP |
49 | [MOUNT_UNMOUNTING_SIGTERM] = UNIT_DEACTIVATING, |
50 | [MOUNT_UNMOUNTING_SIGKILL] = UNIT_DEACTIVATING, | |
17e9d53d YW |
51 | [MOUNT_FAILED] = UNIT_FAILED, |
52 | [MOUNT_CLEANING] = UNIT_MAINTENANCE, | |
f50e0a01 | 53 | }; |
5cb5a6ff | 54 | |
718db961 LP |
55 | static int mount_dispatch_timer(sd_event_source *source, usec_t usec, void *userdata); |
56 | static int mount_dispatch_io(sd_event_source *source, int fd, uint32_t revents, void *userdata); | |
01400460 YW |
57 | static void mount_enter_dead(Mount *m, MountResult f); |
58 | static void mount_enter_mounted(Mount *m, MountResult f); | |
59 | static void mount_cycle_clear(Mount *m); | |
35080486 | 60 | static int mount_process_proc_self_mountinfo(Manager *m); |
718db961 | 61 | |
c634f3d2 LP |
62 | static bool MOUNT_STATE_WITH_PROCESS(MountState state) { |
63 | return IN_SET(state, | |
64 | MOUNT_MOUNTING, | |
65 | MOUNT_MOUNTING_DONE, | |
66 | MOUNT_REMOUNTING, | |
67 | MOUNT_REMOUNTING_SIGTERM, | |
68 | MOUNT_REMOUNTING_SIGKILL, | |
69 | MOUNT_UNMOUNTING, | |
70 | MOUNT_UNMOUNTING_SIGTERM, | |
17e9d53d YW |
71 | MOUNT_UNMOUNTING_SIGKILL, |
72 | MOUNT_CLEANING); | |
c634f3d2 LP |
73 | } |
74 | ||
47cd17ea LP |
75 | static MountParameters* get_mount_parameters_fragment(Mount *m) { |
76 | assert(m); | |
77 | ||
78 | if (m->from_fragment) | |
79 | return &m->parameters_fragment; | |
80 | ||
81 | return NULL; | |
82 | } | |
83 | ||
84 | static MountParameters* get_mount_parameters(Mount *m) { | |
85 | assert(m); | |
86 | ||
87 | if (m->from_proc_self_mountinfo) | |
88 | return &m->parameters_proc_self_mountinfo; | |
89 | ||
90 | return get_mount_parameters_fragment(m); | |
91 | } | |
92 | ||
7121cbcf LP |
93 | static bool mount_is_network(const MountParameters *p) { |
94 | assert(p); | |
95 | ||
96 | if (fstab_test_option(p->options, "_netdev\0")) | |
fc676b00 ZJS |
97 | return true; |
98 | ||
7121cbcf | 99 | if (p->fstype && fstype_is_network(p->fstype)) |
fc676b00 ZJS |
100 | return true; |
101 | ||
102 | return false; | |
103 | } | |
104 | ||
5a7c4f4f FB |
105 | static bool mount_is_nofail(const Mount *m) { |
106 | assert(m); | |
107 | ||
108 | if (!m->from_fragment) | |
109 | return false; | |
110 | ||
111 | return fstab_test_yes_no_option(m->parameters_fragment.options, "nofail\0" "fail\0"); | |
112 | } | |
113 | ||
d3bd0986 MK |
114 | static bool mount_is_loop(const MountParameters *p) { |
115 | assert(p); | |
116 | ||
117 | if (fstab_test_option(p->options, "loop\0")) | |
118 | return true; | |
119 | ||
120 | return false; | |
121 | } | |
122 | ||
e6a7b9f4 | 123 | static bool mount_is_bind(const MountParameters *p) { |
fc676b00 | 124 | assert(p); |
35df78cd | 125 | return fstab_is_bind(p->options, p->fstype); |
fc676b00 ZJS |
126 | } |
127 | ||
707ecf14 MY |
128 | static int mount_is_bound_to_device(Mount *m) { |
129 | _cleanup_free_ char *value = NULL; | |
ebc8968b | 130 | const MountParameters *p; |
707ecf14 | 131 | int r; |
ebc8968b | 132 | |
47cd17ea LP |
133 | assert(m); |
134 | ||
135 | /* Determines whether to place a Requires= or BindsTo= dependency on the backing device unit. We do | |
707ecf14 | 136 | * this by checking for the x-systemd.device-bound= mount option. If it is enabled we use BindsTo=, |
47cd17ea LP |
137 | * otherwise Requires=. But note that we might combine the latter with StopPropagatedFrom=, see |
138 | * below. */ | |
139 | ||
140 | p = get_mount_parameters(m); | |
141 | if (!p) | |
142 | return false; | |
ebc8968b | 143 | |
707ecf14 MY |
144 | r = fstab_filter_options(p->options, "x-systemd.device-bound\0", NULL, &value, NULL, NULL); |
145 | if (r < 0) | |
146 | return r; | |
147 | if (r == 0) | |
148 | return -EIDRM; /* If unspecified at all, return recognizable error */ | |
149 | ||
150 | if (isempty(value)) | |
151 | return true; | |
152 | ||
153 | return parse_boolean(value); | |
ebc8968b FB |
154 | } |
155 | ||
47cd17ea | 156 | static bool mount_propagate_stop(Mount *m) { |
707ecf14 MY |
157 | int r; |
158 | ||
47cd17ea LP |
159 | assert(m); |
160 | ||
707ecf14 MY |
161 | r = mount_is_bound_to_device(m); |
162 | if (r >= 0) | |
163 | /* If x-systemd.device-bound=no is explicitly requested by user, don't try to set StopPropagatedFrom=. | |
164 | * Also don't bother if true, since with BindsTo= the stop propagation is implicit. */ | |
47cd17ea | 165 | return false; |
707ecf14 MY |
166 | if (r != -EIDRM) |
167 | log_debug_errno(r, "Failed to get x-systemd.device-bound= option, ignoring: %m"); | |
47cd17ea LP |
168 | |
169 | return m->from_fragment; /* let's propagate stop whenever this is an explicitly configured unit, | |
170 | * otherwise let's not bother. */ | |
171 | } | |
172 | ||
06e457b1 | 173 | static bool mount_needs_quota(const MountParameters *p) { |
fc676b00 ZJS |
174 | assert(p); |
175 | ||
d72f4a38 | 176 | if (p->fstype && !fstype_needs_quota(p->fstype)) |
fc676b00 ZJS |
177 | return false; |
178 | ||
179 | if (mount_is_bind(p)) | |
180 | return false; | |
181 | ||
d15d0333 ZJS |
182 | return fstab_test_option(p->options, |
183 | "usrquota\0" "grpquota\0" "quota\0" "usrjquota\0" "grpjquota\0"); | |
fc676b00 ZJS |
184 | } |
185 | ||
a16e1123 LP |
186 | static void mount_init(Unit *u) { |
187 | Mount *m = MOUNT(u); | |
5cb5a6ff | 188 | |
c73f413d | 189 | assert(m); |
a16e1123 | 190 | assert(u); |
ac155bb8 | 191 | assert(u->load_state == UNIT_STUB); |
a16e1123 | 192 | |
c9e120e0 | 193 | m->timeout_usec = u->manager->defaults.timeout_start_usec; |
5804e1b6 | 194 | |
c9e120e0 LP |
195 | m->exec_context.std_output = u->manager->defaults.std_output; |
196 | m->exec_context.std_error = u->manager->defaults.std_error; | |
5804e1b6 | 197 | |
3e5235b0 LP |
198 | m->directory_mode = 0755; |
199 | ||
f00929ad DJL |
200 | /* We need to make sure that /usr/bin/mount is always called |
201 | * in the same process group as us, so that the autofs kernel | |
a16e1123 LP |
202 | * side doesn't send us another mount request while we are |
203 | * already trying to comply its last one. */ | |
74922904 | 204 | m->exec_context.same_pgrp = true; |
8d567588 | 205 | |
360f384f | 206 | m->control_pid = PIDREF_NULL; |
a16e1123 | 207 | m->control_command_id = _MOUNT_EXEC_COMMAND_INVALID; |
c8f4d764 | 208 | |
5bcb0f2b | 209 | u->ignore_on_isolate = true; |
8d567588 LP |
210 | } |
211 | ||
e9276800 | 212 | static int mount_arm_timer(Mount *m, bool relative, usec_t usec) { |
718db961 LP |
213 | assert(m); |
214 | ||
e9276800 | 215 | return unit_arm_timer(UNIT(m), &m->timer_event_source, relative, usec, mount_dispatch_timer); |
718db961 LP |
216 | } |
217 | ||
a16e1123 | 218 | static void mount_unwatch_control_pid(Mount *m) { |
5e94833f LP |
219 | assert(m); |
220 | ||
360f384f | 221 | if (!pidref_is_set(&m->control_pid)) |
5e94833f LP |
222 | return; |
223 | ||
495e75ed | 224 | unit_unwatch_pidref(UNIT(m), &m->control_pid); |
360f384f | 225 | pidref_done(&m->control_pid); |
5e94833f LP |
226 | } |
227 | ||
e537352b LP |
228 | static void mount_parameters_done(MountParameters *p) { |
229 | assert(p); | |
230 | ||
a26592cf LP |
231 | p->what = mfree(p->what); |
232 | p->options = mfree(p->options); | |
233 | p->fstype = mfree(p->fstype); | |
e537352b LP |
234 | } |
235 | ||
87f0e418 | 236 | static void mount_done(Unit *u) { |
ef734fd6 | 237 | Mount *m = MOUNT(u); |
034c6ed7 | 238 | |
ef734fd6 | 239 | assert(m); |
034c6ed7 | 240 | |
a1e58e8e | 241 | m->where = mfree(m->where); |
f50e0a01 | 242 | |
e537352b LP |
243 | mount_parameters_done(&m->parameters_proc_self_mountinfo); |
244 | mount_parameters_done(&m->parameters_fragment); | |
ef734fd6 | 245 | |
28135da3 | 246 | m->exec_runtime = exec_runtime_free(m->exec_runtime); |
e537352b LP |
247 | exec_command_done_array(m->exec_command, _MOUNT_EXEC_COMMAND_MAX); |
248 | m->control_command = NULL; | |
f50e0a01 | 249 | |
a16e1123 | 250 | mount_unwatch_control_pid(m); |
f50e0a01 | 251 | |
5dcadb4c | 252 | m->timer_event_source = sd_event_source_disable_unref(m->timer_event_source); |
f50e0a01 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 | ||
bcf58ff5 YW |
266 | r = free_and_strdup(&p->what, what); |
267 | if (r < 0) | |
268 | return r; | |
aaf7b0e4 | 269 | |
bcf58ff5 YW |
270 | q = free_and_strdup(&p->options, options); |
271 | if (q < 0) | |
272 | return q; | |
b7bbf890 ZJS |
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 | 293 | |
45519d13 LP |
294 | r = path_extract_directory(m->where, &parent); |
295 | if (r < 0) | |
296 | return r; | |
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) { |
87c734ee | 341 | UnitDependencyMask mask; |
eef85c4a | 342 | MountParameters *p; |
ebc8968b | 343 | UnitDependency dep; |
9fff8a1f | 344 | int r; |
173a8d04 LP |
345 | |
346 | assert(m); | |
347 | ||
556b6f4e DDM |
348 | log_unit_trace(UNIT(m), "Processing implicit device dependencies"); |
349 | ||
06e97888 | 350 | p = get_mount_parameters(m); |
556b6f4e DDM |
351 | if (!p) { |
352 | log_unit_trace(UNIT(m), "Missing mount parameters, skipping implicit device dependencies"); | |
173a8d04 | 353 | return 0; |
556b6f4e | 354 | } |
173a8d04 | 355 | |
556b6f4e DDM |
356 | if (!p->what) { |
357 | log_unit_trace(UNIT(m), "Missing mount source, skipping implicit device dependencies"); | |
173a8d04 | 358 | return 0; |
556b6f4e | 359 | } |
5c78d8e2 | 360 | |
556b6f4e DDM |
361 | if (mount_is_bind(p)) { |
362 | log_unit_trace(UNIT(m), "Mount unit is a bind mount, skipping implicit device dependencies"); | |
dd144c63 | 363 | return 0; |
556b6f4e | 364 | } |
dd144c63 | 365 | |
556b6f4e DDM |
366 | if (!is_device_path(p->what)) { |
367 | log_unit_trace(UNIT(m), "Mount source is not a device path, skipping implicit device dependencies"); | |
dd144c63 | 368 | return 0; |
556b6f4e | 369 | } |
dd144c63 | 370 | |
5de0acf4 LP |
371 | /* /dev/root is a really weird thing, it's not a real device, but just a path the kernel exports for |
372 | * the root file system specified on the kernel command line. Ignore it here. */ | |
556b6f4e DDM |
373 | if (PATH_IN_SET(p->what, "/dev/root", "/dev/nfs")) { |
374 | log_unit_trace(UNIT(m), "Mount source is in /dev/root or /dev/nfs, skipping implicit device dependencies"); | |
7ba2711d | 375 | return 0; |
556b6f4e | 376 | } |
7ba2711d | 377 | |
556b6f4e DDM |
378 | if (path_equal(m->where, "/")) { |
379 | log_unit_trace(UNIT(m), "Mount destination is '/', skipping implicit device dependencies"); | |
dd144c63 | 380 | return 0; |
556b6f4e | 381 | } |
dd144c63 | 382 | |
44b0d1fd | 383 | /* Mount units from /proc/self/mountinfo are not bound to devices by default since they're subject to |
47cd17ea LP |
384 | * races when mounts are established by other tools with different backing devices than what we |
385 | * maintain. The user can still force this to be a BindsTo= dependency with an appropriate option (or | |
386 | * udev property) so the mount units are automatically stopped when the device disappears | |
44b0d1fd | 387 | * suddenly. */ |
707ecf14 | 388 | dep = mount_is_bound_to_device(m) > 0 ? UNIT_BINDS_TO : UNIT_REQUIRES; |
ebc8968b | 389 | |
87c734ee FB |
390 | /* We always use 'what' from /proc/self/mountinfo if mounted */ |
391 | mask = m->from_proc_self_mountinfo ? UNIT_DEPENDENCY_MOUNTINFO : UNIT_DEPENDENCY_MOUNT_FILE; | |
392 | ||
393 | r = unit_add_node_dependency(UNIT(m), p->what, dep, mask); | |
dd144c63 LP |
394 | if (r < 0) |
395 | return r; | |
556b6f4e DDM |
396 | if (r > 0) |
397 | log_unit_trace(UNIT(m), "Added %s dependency on %s", unit_dependency_to_string(dep), p->what); | |
398 | ||
47cd17ea | 399 | if (mount_propagate_stop(m)) { |
87c734ee | 400 | r = unit_add_node_dependency(UNIT(m), p->what, UNIT_STOP_PROPAGATED_FROM, mask); |
47cd17ea LP |
401 | if (r < 0) |
402 | return r; | |
556b6f4e DDM |
403 | if (r > 0) |
404 | log_unit_trace(UNIT(m), "Added %s dependency on %s", | |
405 | unit_dependency_to_string(UNIT_STOP_PROPAGATED_FROM), p->what); | |
47cd17ea | 406 | } |
9fff8a1f | 407 | |
87c734ee | 408 | r = unit_add_blockdev_dependency(UNIT(m), p->what, mask); |
556b6f4e DDM |
409 | if (r > 0) |
410 | log_unit_trace(UNIT(m), "Added %s dependency on %s", unit_dependency_to_string(UNIT_AFTER), p->what); | |
411 | ||
49267b1b | 412 | return 0; |
173a8d04 LP |
413 | } |
414 | ||
eef85c4a | 415 | static int mount_add_quota_dependencies(Mount *m) { |
6b1dc2bd | 416 | MountParameters *p; |
eef85c4a | 417 | int r; |
6b1dc2bd LP |
418 | |
419 | assert(m); | |
420 | ||
463d0d15 | 421 | if (!MANAGER_IS_SYSTEM(UNIT(m)->manager)) |
6b1dc2bd LP |
422 | return 0; |
423 | ||
424 | p = get_mount_parameters_fragment(m); | |
425 | if (!p) | |
426 | return 0; | |
427 | ||
06e457b1 | 428 | if (!mount_needs_quota(p)) |
6b1dc2bd LP |
429 | return 0; |
430 | ||
c5d82021 FB |
431 | r = unit_add_two_dependencies_by_name(UNIT(m), UNIT_BEFORE, UNIT_WANTS, SPECIAL_QUOTACHECK_SERVICE, |
432 | /* add_reference= */ true, UNIT_DEPENDENCY_FILE); | |
6b1dc2bd LP |
433 | if (r < 0) |
434 | return r; | |
435 | ||
c5d82021 FB |
436 | r = unit_add_two_dependencies_by_name(UNIT(m), UNIT_BEFORE, UNIT_WANTS, SPECIAL_QUOTAON_SERVICE, |
437 | /* add_reference= */true, UNIT_DEPENDENCY_FILE); | |
6b1dc2bd LP |
438 | if (r < 0) |
439 | return r; | |
440 | ||
441 | return 0; | |
442 | } | |
443 | ||
39c79477 | 444 | static bool mount_is_extrinsic(Unit *u) { |
88ac30a1 | 445 | MountParameters *p; |
39c79477 | 446 | Mount *m = MOUNT(u); |
ad2706db | 447 | assert(m); |
88ac30a1 | 448 | |
bc9e5a4c FB |
449 | /* Returns true for all units that are "magic" and should be excluded from the usual |
450 | * start-up and shutdown dependencies. We call them "extrinsic" here, as they are generally | |
451 | * mounted outside of the systemd dependency logic. We shouldn't attempt to manage them | |
452 | * ourselves but it's fine if the user operates on them with us. */ | |
ad2706db | 453 | |
bc9e5a4c | 454 | /* We only automatically manage mounts if we are in system mode */ |
39c79477 | 455 | if (MANAGER_IS_USER(u->manager)) |
b8e5776d LP |
456 | return true; |
457 | ||
88ac30a1 | 458 | p = get_mount_parameters(m); |
bc9e5a4c | 459 | if (p && fstab_is_extrinsic(m->where, p->options)) |
ad2706db | 460 | return true; |
88ac30a1 | 461 | |
ad2706db | 462 | return false; |
88ac30a1 TG |
463 | } |
464 | ||
92e64e9a LP |
465 | static bool mount_is_credentials(Mount *m) { |
466 | const char *e; | |
467 | ||
468 | assert(m); | |
469 | ||
470 | /* Returns true if this is a credentials mount. We don't want automatic dependencies on credential | |
471 | * mounts, since they are managed by us for even the earliest services, and we never want anything to | |
472 | * be ordered before them hence. */ | |
473 | ||
474 | e = path_startswith(m->where, UNIT(m)->manager->prefix[EXEC_DIRECTORY_RUNTIME]); | |
475 | if (!e) | |
476 | return false; | |
477 | ||
478 | return !isempty(path_startswith(e, "credentials")); | |
479 | } | |
480 | ||
87c734ee | 481 | static int mount_add_default_ordering_dependencies(Mount *m, MountParameters *p, UnitDependencyMask mask) { |
83cdc870 | 482 | const char *after, *before, *e; |
d54bab90 | 483 | int r; |
2edd4434 LP |
484 | |
485 | assert(m); | |
486 | ||
83cdc870 FB |
487 | e = path_startswith(m->where, "/sysroot"); |
488 | if (e && in_initrd()) { | |
489 | /* All mounts under /sysroot need to happen later, at initrd-fs.target time. IOW, | |
490 | * it's not technically part of the basic initrd filesystem itself, and so | |
6e017b19 WF |
491 | * shouldn't inherit the default Before=local-fs.target dependency. However, |
492 | * these mounts still need to start after local-fs-pre.target, as a sync point | |
760e99bb | 493 | * for things like systemd-hibernate-resume.service that should start before |
6e017b19 | 494 | * any mounts. */ |
83cdc870 | 495 | |
6e017b19 | 496 | after = SPECIAL_LOCAL_FS_PRE_TARGET; |
83cdc870 FB |
497 | before = isempty(e) ? SPECIAL_INITRD_ROOT_FS_TARGET : SPECIAL_INITRD_FS_TARGET; |
498 | ||
dbfc0960 | 499 | } else if (in_initrd() && path_startswith(m->where, "/sysusr/usr")) { |
6e017b19 | 500 | after = SPECIAL_LOCAL_FS_PRE_TARGET; |
dbfc0960 YW |
501 | before = SPECIAL_INITRD_USR_FS_TARGET; |
502 | ||
92e64e9a LP |
503 | } else if (mount_is_credentials(m)) |
504 | after = before = NULL; | |
505 | ||
506 | else if (mount_is_network(p)) { | |
ea0ec5ce | 507 | after = SPECIAL_REMOTE_FS_PRE_TARGET; |
d54bab90 | 508 | before = SPECIAL_REMOTE_FS_TARGET; |
2ec15c4f | 509 | |
d54bab90 | 510 | } else { |
ea0ec5ce | 511 | after = SPECIAL_LOCAL_FS_PRE_TARGET; |
d54bab90 LP |
512 | before = SPECIAL_LOCAL_FS_TARGET; |
513 | } | |
514 | ||
92e64e9a | 515 | if (before && !mount_is_nofail(m)) { |
87c734ee | 516 | r = unit_add_dependency_by_name(UNIT(m), UNIT_BEFORE, before, /* add_reference= */ true, mask); |
8c8203db YW |
517 | if (r < 0) |
518 | return r; | |
519 | } | |
ea0ec5ce | 520 | |
92e64e9a LP |
521 | if (after) { |
522 | r = unit_add_dependency_by_name(UNIT(m), UNIT_AFTER, after, /* add_reference= */ true, mask); | |
523 | if (r < 0) | |
524 | return r; | |
525 | } | |
526 | ||
527 | r = unit_add_two_dependencies_by_name(UNIT(m), UNIT_BEFORE, UNIT_CONFLICTS, SPECIAL_UMOUNT_TARGET, | |
528 | /* add_reference= */ true, mask); | |
6e017b19 WF |
529 | if (r < 0) |
530 | return r; | |
e8d2f6cd | 531 | |
92e64e9a LP |
532 | /* If this is a tmpfs mount then we have to unmount it before we try to deactivate swaps */ |
533 | if (streq_ptr(p->fstype, "tmpfs") && !mount_is_credentials(m)) { | |
534 | r = unit_add_dependency_by_name(UNIT(m), UNIT_AFTER, SPECIAL_SWAP_TARGET, | |
535 | /* add_reference= */ true, mask); | |
536 | if (r < 0) | |
537 | return r; | |
538 | } | |
539 | ||
540 | return 0; | |
61154cf9 FB |
541 | } |
542 | ||
75b09529 LP |
543 | static int mount_add_default_network_dependencies(Mount *m, MountParameters *p, UnitDependencyMask mask) { |
544 | int r; | |
545 | ||
546 | assert(m); | |
547 | ||
548 | if (!mount_is_network(p)) | |
549 | return 0; | |
550 | ||
551 | /* We order ourselves after network.target. This is primarily useful at shutdown: services that take | |
552 | * down the network should order themselves before network.target, so that they are shut down only | |
553 | * after this mount unit is stopped. */ | |
554 | ||
555 | r = unit_add_dependency_by_name(UNIT(m), UNIT_AFTER, SPECIAL_NETWORK_TARGET, | |
556 | /* add_reference= */ true, mask); | |
6e017b19 WF |
557 | if (r < 0) |
558 | return r; | |
e8d2f6cd | 559 | |
75b09529 LP |
560 | /* We pull in network-online.target, and order ourselves after it. This is useful at start-up to |
561 | * actively pull in tools that want to be started before we start mounting network file systems, and | |
562 | * whose purpose it is to delay this until the network is "up". */ | |
563 | ||
564 | return unit_add_two_dependencies_by_name(UNIT(m), UNIT_WANTS, UNIT_AFTER, SPECIAL_NETWORK_ONLINE_TARGET, | |
87c734ee | 565 | /* add_reference= */ true, mask); |
61154cf9 FB |
566 | } |
567 | ||
2edd4434 | 568 | static int mount_add_default_dependencies(Mount *m) { |
87c734ee | 569 | UnitDependencyMask mask; |
9ddc4a26 | 570 | MountParameters *p; |
d54bab90 | 571 | int r; |
2edd4434 LP |
572 | |
573 | assert(m); | |
574 | ||
4c9ea260 LP |
575 | if (!UNIT(m)->default_dependencies) |
576 | return 0; | |
577 | ||
61154cf9 FB |
578 | /* We do not add any default dependencies to /, /usr or /run/initramfs/, since they are |
579 | * guaranteed to stay mounted the whole time, since our system is on it. Also, don't | |
580 | * bother with anything mounted below virtual file systems, it's also going to be virtual, | |
581 | * and hence not worth the effort. */ | |
39c79477 | 582 | if (mount_is_extrinsic(UNIT(m))) |
6b1dc2bd | 583 | return 0; |
2edd4434 | 584 | |
874d3404 LP |
585 | p = get_mount_parameters(m); |
586 | if (!p) | |
6b1dc2bd LP |
587 | return 0; |
588 | ||
87c734ee FB |
589 | mask = m->from_proc_self_mountinfo ? UNIT_DEPENDENCY_MOUNTINFO : UNIT_DEPENDENCY_MOUNT_FILE; |
590 | ||
591 | r = mount_add_default_ordering_dependencies(m, p, mask); | |
ad2706db LP |
592 | if (r < 0) |
593 | return r; | |
eef85c4a | 594 | |
75b09529 LP |
595 | r = mount_add_default_network_dependencies(m, p, mask); |
596 | if (r < 0) | |
597 | return r; | |
3e3852b3 | 598 | |
84214541 | 599 | return 0; |
2edd4434 LP |
600 | } |
601 | ||
8d567588 | 602 | static int mount_verify(Mount *m) { |
a57f7e2c | 603 | _cleanup_free_ char *e = NULL; |
b294b79f | 604 | MountParameters *p; |
7410616c | 605 | int r; |
a57f7e2c | 606 | |
8d567588 | 607 | assert(m); |
75193d41 | 608 | assert(UNIT(m)->load_state == UNIT_LOADED); |
8d567588 | 609 | |
1df96fcb | 610 | if (!m->from_fragment && !m->from_proc_self_mountinfo && !UNIT(m)->perpetual) |
8cbef760 LP |
611 | return -ENOENT; |
612 | ||
7410616c LP |
613 | r = unit_name_from_path(m->where, ".mount", &e); |
614 | if (r < 0) | |
f2341e0a | 615 | return log_unit_error_errno(UNIT(m), r, "Failed to generate unit name from mount path: %m"); |
8d567588 | 616 | |
d85ff944 YW |
617 | if (!unit_has_name(UNIT(m), e)) |
618 | return log_unit_error_errno(UNIT(m), SYNTHETIC_ERRNO(ENOEXEC), "Where= setting doesn't match unit name. Refusing."); | |
8d567588 | 619 | |
d85ff944 YW |
620 | if (mount_point_is_api(m->where) || mount_point_ignore(m->where)) |
621 | return log_unit_error_errno(UNIT(m), SYNTHETIC_ERRNO(ENOEXEC), "Cannot create mount unit for API file system %s. Refusing.", m->where); | |
33ff02c9 | 622 | |
b294b79f | 623 | p = get_mount_parameters_fragment(m); |
0879fbd6 LP |
624 | if (p && !p->what && !UNIT(m)->perpetual) |
625 | return log_unit_error_errno(UNIT(m), SYNTHETIC_ERRNO(ENOEXEC), | |
626 | "What= setting is missing. Refusing."); | |
4e85aff4 | 627 | |
d85ff944 YW |
628 | if (m->exec_context.pam_name && m->kill_context.kill_mode != KILL_CONTROL_GROUP) |
629 | return log_unit_error_errno(UNIT(m), SYNTHETIC_ERRNO(ENOEXEC), "Unit has PAM enabled. Kill mode must be set to control-group'. Refusing."); | |
4d0e5dbd | 630 | |
8d567588 LP |
631 | return 0; |
632 | } | |
633 | ||
bf7eedbf LP |
634 | static int mount_add_non_exec_dependencies(Mount *m) { |
635 | int r; | |
49267b1b | 636 | |
bf7eedbf LP |
637 | assert(m); |
638 | ||
9c77ffc7 FB |
639 | /* We may be called due to this mount appearing in /proc/self/mountinfo, hence we clear all existing |
640 | * dependencies that were initialized from the unit file but whose final value really depends on the | |
641 | * content of /proc/self/mountinfo. Some (such as m->where) might have become stale now. */ | |
87c734ee | 642 | unit_remove_dependencies(UNIT(m), UNIT_DEPENDENCY_MOUNTINFO | UNIT_DEPENDENCY_MOUNT_FILE); |
49267b1b YW |
643 | |
644 | if (!m->where) | |
645 | return 0; | |
646 | ||
bf7eedbf LP |
647 | /* Adds in all dependencies directly responsible for ordering the mount, as opposed to dependencies |
648 | * resulting from the ExecContext and such. */ | |
649 | ||
650 | r = mount_add_device_dependencies(m); | |
651 | if (r < 0) | |
652 | return r; | |
653 | ||
654 | r = mount_add_mount_dependencies(m); | |
655 | if (r < 0) | |
656 | return r; | |
657 | ||
658 | r = mount_add_quota_dependencies(m); | |
659 | if (r < 0) | |
660 | return r; | |
661 | ||
662 | r = mount_add_default_dependencies(m); | |
663 | if (r < 0) | |
664 | return r; | |
665 | ||
666 | return 0; | |
667 | } | |
668 | ||
1a4ac875 MS |
669 | static int mount_add_extras(Mount *m) { |
670 | Unit *u = UNIT(m); | |
e537352b LP |
671 | int r; |
672 | ||
e821075a LP |
673 | assert(m); |
674 | ||
1f736476 LP |
675 | /* Note: this call might be called after we already have been loaded once (and even when it has already been |
676 | * activated), in case data from /proc/self/mountinfo has changed. This means all code here needs to be ready | |
677 | * to run with an already set up unit. */ | |
678 | ||
e821075a | 679 | if (u->fragment_path) |
1a4ac875 | 680 | m->from_fragment = true; |
e537352b | 681 | |
1a4ac875 | 682 | if (!m->where) { |
7410616c | 683 | r = unit_name_to_path(u->id, &m->where); |
1d0727e7 MS |
684 | if (r == -ENAMETOOLONG) |
685 | log_unit_error_errno(u, r, "Failed to derive mount point path from unit name, because unit name is hashed. " | |
686 | "Set \"Where=\" in the unit file explicitly."); | |
7410616c LP |
687 | if (r < 0) |
688 | return r; | |
1a4ac875 | 689 | } |
a16e1123 | 690 | |
4ff361cc | 691 | path_simplify(m->where); |
e537352b | 692 | |
e821075a | 693 | if (!u->description) { |
1a4ac875 MS |
694 | r = unit_set_description(u, m->where); |
695 | if (r < 0) | |
173a8d04 | 696 | return r; |
1a4ac875 | 697 | } |
6e2ef85b | 698 | |
598459ce LP |
699 | r = unit_patch_contexts(u); |
700 | if (r < 0) | |
701 | return r; | |
4e67ddd6 | 702 | |
598459ce | 703 | r = unit_add_exec_dependencies(u, &m->exec_context); |
a016b922 LP |
704 | if (r < 0) |
705 | return r; | |
706 | ||
d79200e2 | 707 | r = unit_set_default_slice(u); |
1a4ac875 MS |
708 | if (r < 0) |
709 | return r; | |
710 | ||
bf7eedbf | 711 | r = mount_add_non_exec_dependencies(m); |
4c9ea260 LP |
712 | if (r < 0) |
713 | return r; | |
598459ce | 714 | |
1a4ac875 MS |
715 | return 0; |
716 | } | |
717 | ||
75193d41 | 718 | static void mount_load_root_mount(Unit *u) { |
11222d0f LP |
719 | assert(u); |
720 | ||
721 | if (!unit_has_name(u, SPECIAL_ROOT_MOUNT)) | |
75193d41 | 722 | return; |
11222d0f LP |
723 | |
724 | u->perpetual = true; | |
725 | u->default_dependencies = false; | |
726 | ||
727 | /* The stdio/kmsg bridge socket is on /, in order to avoid a dep loop, don't use kmsg logging for -.mount */ | |
728 | MOUNT(u)->exec_context.std_output = EXEC_OUTPUT_NULL; | |
729 | MOUNT(u)->exec_context.std_input = EXEC_INPUT_NULL; | |
730 | ||
731 | if (!u->description) | |
732 | u->description = strdup("Root Mount"); | |
11222d0f LP |
733 | } |
734 | ||
1a4ac875 MS |
735 | static int mount_load(Unit *u) { |
736 | Mount *m = MOUNT(u); | |
75193d41 | 737 | int r, q = 0; |
1a4ac875 | 738 | |
c73f413d | 739 | assert(m); |
1a4ac875 MS |
740 | assert(u); |
741 | assert(u->load_state == UNIT_STUB); | |
742 | ||
75193d41 | 743 | mount_load_root_mount(u); |
11222d0f | 744 | |
c3620770 | 745 | bool fragment_optional = m->from_proc_self_mountinfo || u->perpetual; |
75193d41 | 746 | r = unit_load_fragment_and_dropin(u, !fragment_optional); |
780ae022 LP |
747 | |
748 | /* Add in some extras. Note we do this in all cases (even if we failed to load the unit) when announced by the | |
749 | * kernel, because we need some things to be set up no matter what when the kernel establishes a mount and thus | |
750 | * we need to update the state in our unit to track it. After all, consider that we don't allow changing the | |
751 | * 'slice' field for a unit once it is active. */ | |
752 | if (u->load_state == UNIT_LOADED || m->from_proc_self_mountinfo || u->perpetual) | |
75193d41 | 753 | q = mount_add_extras(m); |
780ae022 | 754 | |
1a4ac875 MS |
755 | if (r < 0) |
756 | return r; | |
780ae022 LP |
757 | if (q < 0) |
758 | return q; | |
75193d41 ZJS |
759 | if (u->load_state != UNIT_LOADED) |
760 | return 0; | |
e537352b | 761 | |
8d567588 | 762 | return mount_verify(m); |
e537352b LP |
763 | } |
764 | ||
765 | static void mount_set_state(Mount *m, MountState state) { | |
766 | MountState old_state; | |
767 | assert(m); | |
768 | ||
6fcbec6f LP |
769 | if (m->state != state) |
770 | bus_unit_send_pending_change_signal(UNIT(m), false); | |
771 | ||
e537352b LP |
772 | old_state = m->state; |
773 | m->state = state; | |
774 | ||
c634f3d2 | 775 | if (!MOUNT_STATE_WITH_PROCESS(state)) { |
5dcadb4c | 776 | m->timer_event_source = sd_event_source_disable_unref(m->timer_event_source); |
a16e1123 | 777 | mount_unwatch_control_pid(m); |
e537352b | 778 | m->control_command = NULL; |
a16e1123 | 779 | m->control_command_id = _MOUNT_EXEC_COMMAND_INVALID; |
e537352b LP |
780 | } |
781 | ||
782 | if (state != old_state) | |
f2341e0a | 783 | log_unit_debug(UNIT(m), "Changed %s -> %s", mount_state_to_string(old_state), mount_state_to_string(state)); |
e537352b | 784 | |
96b09de5 | 785 | unit_notify(UNIT(m), state_translation_table[old_state], state_translation_table[state], m->reload_result == MOUNT_SUCCESS); |
e537352b LP |
786 | } |
787 | ||
be847e82 | 788 | static int mount_coldplug(Unit *u) { |
e537352b | 789 | Mount *m = MOUNT(u); |
a16e1123 | 790 | int r; |
e537352b LP |
791 | |
792 | assert(m); | |
793 | assert(m->state == MOUNT_DEAD); | |
794 | ||
01400460 | 795 | if (m->deserialized_state == m->state) |
5bcb0f2b | 796 | return 0; |
e537352b | 797 | |
360f384f LP |
798 | if (pidref_is_set(&m->control_pid) && |
799 | pid_is_unwaited(m->control_pid.pid) && | |
01400460 | 800 | MOUNT_STATE_WITH_PROCESS(m->deserialized_state)) { |
5bcb0f2b | 801 | |
495e75ed | 802 | r = unit_watch_pidref(UNIT(m), &m->control_pid, /* exclusive= */ false); |
5bcb0f2b LP |
803 | if (r < 0) |
804 | return r; | |
e537352b | 805 | |
e9276800 | 806 | r = mount_arm_timer(m, /* relative= */ false, usec_add(u->state_change_timestamp.monotonic, m->timeout_usec)); |
5bcb0f2b LP |
807 | if (r < 0) |
808 | return r; | |
a16e1123 | 809 | } |
e537352b | 810 | |
15220772 | 811 | if (!IN_SET(m->deserialized_state, MOUNT_DEAD, MOUNT_FAILED)) |
e8a565cb | 812 | (void) unit_setup_exec_runtime(u); |
29206d46 | 813 | |
01400460 | 814 | mount_set_state(m, m->deserialized_state); |
e537352b | 815 | return 0; |
e537352b LP |
816 | } |
817 | ||
01400460 YW |
818 | static void mount_catchup(Unit *u) { |
819 | Mount *m = MOUNT(ASSERT_PTR(u)); | |
820 | ||
821 | assert(m); | |
822 | ||
823 | /* Adjust the deserialized state. See comments in mount_process_proc_self_mountinfo(). */ | |
824 | if (m->from_proc_self_mountinfo) | |
825 | switch (m->state) { | |
826 | case MOUNT_DEAD: | |
827 | case MOUNT_FAILED: | |
360f384f | 828 | assert(!pidref_is_set(&m->control_pid)); |
039f4284 | 829 | (void) unit_acquire_invocation_id(u); |
01400460 YW |
830 | mount_cycle_clear(m); |
831 | mount_enter_mounted(m, MOUNT_SUCCESS); | |
832 | break; | |
833 | case MOUNT_MOUNTING: | |
360f384f | 834 | assert(pidref_is_set(&m->control_pid)); |
01400460 YW |
835 | mount_set_state(m, MOUNT_MOUNTING_DONE); |
836 | break; | |
837 | default: | |
838 | break; | |
839 | } | |
840 | else | |
841 | switch (m->state) { | |
842 | case MOUNT_MOUNTING_DONE: | |
360f384f | 843 | assert(pidref_is_set(&m->control_pid)); |
01400460 YW |
844 | mount_set_state(m, MOUNT_MOUNTING); |
845 | break; | |
846 | case MOUNT_MOUNTED: | |
360f384f | 847 | assert(!pidref_is_set(&m->control_pid)); |
01400460 YW |
848 | mount_enter_dead(m, MOUNT_SUCCESS); |
849 | break; | |
850 | default: | |
851 | break; | |
852 | } | |
853 | } | |
854 | ||
e537352b LP |
855 | static void mount_dump(Unit *u, FILE *f, const char *prefix) { |
856 | Mount *m = MOUNT(u); | |
857 | MountParameters *p; | |
858 | ||
859 | assert(m); | |
860 | assert(f); | |
861 | ||
cb39ed3f | 862 | p = get_mount_parameters(m); |
e537352b LP |
863 | |
864 | fprintf(f, | |
865 | "%sMount State: %s\n" | |
81a5c6d0 | 866 | "%sResult: %s\n" |
17e9d53d | 867 | "%sClean Result: %s\n" |
e537352b LP |
868 | "%sWhere: %s\n" |
869 | "%sWhat: %s\n" | |
870 | "%sFile System Type: %s\n" | |
871 | "%sOptions: %s\n" | |
e537352b LP |
872 | "%sFrom /proc/self/mountinfo: %s\n" |
873 | "%sFrom fragment: %s\n" | |
ad2706db | 874 | "%sExtrinsic: %s\n" |
e520950a | 875 | "%sDirectoryMode: %04o\n" |
49915de2 | 876 | "%sSloppyOptions: %s\n" |
4f8d40a9 | 877 | "%sLazyUnmount: %s\n" |
91899792 | 878 | "%sForceUnmount: %s\n" |
c600357b | 879 | "%sReadWriteOnly: %s\n" |
ac8956ef | 880 | "%sTimeoutSec: %s\n", |
a16e1123 | 881 | prefix, mount_state_to_string(m->state), |
81a5c6d0 | 882 | prefix, mount_result_to_string(m->result), |
17e9d53d | 883 | prefix, mount_result_to_string(m->clean_result), |
e537352b | 884 | prefix, m->where, |
1e4fc9b1 HH |
885 | prefix, p ? strna(p->what) : "n/a", |
886 | prefix, p ? strna(p->fstype) : "n/a", | |
887 | prefix, p ? strna(p->options) : "n/a", | |
e537352b LP |
888 | prefix, yes_no(m->from_proc_self_mountinfo), |
889 | prefix, yes_no(m->from_fragment), | |
39c79477 | 890 | prefix, yes_no(mount_is_extrinsic(u)), |
e520950a | 891 | prefix, m->directory_mode, |
49915de2 | 892 | prefix, yes_no(m->sloppy_options), |
4f8d40a9 | 893 | prefix, yes_no(m->lazy_unmount), |
91899792 | 894 | prefix, yes_no(m->force_unmount), |
c600357b | 895 | prefix, yes_no(m->read_write_only), |
5291f26d | 896 | prefix, FORMAT_TIMESPAN(m->timeout_usec, USEC_PER_SEC)); |
e537352b | 897 | |
360f384f | 898 | if (pidref_is_set(&m->control_pid)) |
e537352b | 899 | fprintf(f, |
ccd06097 | 900 | "%sControl PID: "PID_FMT"\n", |
360f384f | 901 | prefix, m->control_pid.pid); |
e537352b LP |
902 | |
903 | exec_context_dump(&m->exec_context, f, prefix); | |
4819ff03 | 904 | kill_context_dump(&m->kill_context, f, prefix); |
bc0623df | 905 | cgroup_context_dump(UNIT(m), f, prefix); |
e537352b LP |
906 | } |
907 | ||
360f384f | 908 | static int mount_spawn(Mount *m, ExecCommand *c, PidRef *ret_pid) { |
3c7416b6 | 909 | |
b646fc32 LB |
910 | _cleanup_(exec_params_clear) ExecParameters exec_params = EXEC_PARAMETERS_INIT( |
911 | EXEC_APPLY_SANDBOXING|EXEC_APPLY_CHROOT|EXEC_APPLY_TTY_STDIN); | |
360f384f | 912 | _cleanup_(pidref_done) PidRef pidref = PIDREF_NULL; |
3c7416b6 LP |
913 | pid_t pid; |
914 | int r; | |
a16e1123 LP |
915 | |
916 | assert(m); | |
917 | assert(c); | |
ef25552e | 918 | assert(ret_pid); |
a16e1123 | 919 | |
3c7416b6 | 920 | r = unit_prepare_exec(UNIT(m)); |
29206d46 LP |
921 | if (r < 0) |
922 | return r; | |
923 | ||
e9276800 | 924 | r = mount_arm_timer(m, /* relative= */ true, m->timeout_usec); |
36697dc0 | 925 | if (r < 0) |
36c16a7c | 926 | return r; |
a16e1123 | 927 | |
1ad6e8b3 LP |
928 | r = unit_set_exec_params(UNIT(m), &exec_params); |
929 | if (r < 0) | |
930 | return r; | |
9fa95f85 | 931 | |
f2341e0a LP |
932 | r = exec_spawn(UNIT(m), |
933 | c, | |
4ad49000 | 934 | &m->exec_context, |
9fa95f85 | 935 | &exec_params, |
613b411c | 936 | m->exec_runtime, |
6bb00842 | 937 | &m->cgroup_context, |
4ad49000 LP |
938 | &pid); |
939 | if (r < 0) | |
36c16a7c | 940 | return r; |
a16e1123 | 941 | |
360f384f | 942 | r = pidref_set_pid(&pidref, pid); |
4ad49000 | 943 | if (r < 0) |
36c16a7c | 944 | return r; |
a16e1123 | 945 | |
495e75ed | 946 | r = unit_watch_pidref(UNIT(m), &pidref, /* exclusive= */ true); |
360f384f LP |
947 | if (r < 0) |
948 | return r; | |
949 | ||
950 | *ret_pid = TAKE_PIDREF(pidref); | |
a16e1123 | 951 | return 0; |
a16e1123 LP |
952 | } |
953 | ||
9d2f5178 | 954 | static void mount_enter_dead(Mount *m, MountResult f) { |
e537352b LP |
955 | assert(m); |
956 | ||
a0fef983 | 957 | if (m->result == MOUNT_SUCCESS) |
9d2f5178 | 958 | m->result = f; |
e537352b | 959 | |
aac99f30 | 960 | unit_log_result(UNIT(m), m->result == MOUNT_SUCCESS, mount_result_to_string(m->result)); |
4c425434 LP |
961 | unit_warn_leftover_processes(UNIT(m), unit_log_leftover_process_stop); |
962 | ||
29206d46 LP |
963 | mount_set_state(m, m->result != MOUNT_SUCCESS ? MOUNT_FAILED : MOUNT_DEAD); |
964 | ||
28135da3 | 965 | m->exec_runtime = exec_runtime_destroy(m->exec_runtime); |
613b411c | 966 | |
bb0c0d6f | 967 | unit_destroy_runtime_data(UNIT(m), &m->exec_context); |
e66cf1a3 | 968 | |
00d9ef85 LP |
969 | unit_unref_uid_gid(UNIT(m), true); |
970 | ||
49267b1b YW |
971 | /* Any dependencies based on /proc/self/mountinfo are now stale. Let's re-generate dependencies from |
972 | * .mount unit. */ | |
973 | (void) mount_add_non_exec_dependencies(m); | |
e537352b LP |
974 | } |
975 | ||
9d2f5178 | 976 | static void mount_enter_mounted(Mount *m, MountResult f) { |
80876c20 LP |
977 | assert(m); |
978 | ||
a0fef983 | 979 | if (m->result == MOUNT_SUCCESS) |
9d2f5178 | 980 | m->result = f; |
80876c20 LP |
981 | |
982 | mount_set_state(m, MOUNT_MOUNTED); | |
983 | } | |
984 | ||
22af0e58 LP |
985 | static void mount_enter_dead_or_mounted(Mount *m, MountResult f) { |
986 | assert(m); | |
987 | ||
988 | /* Enter DEAD or MOUNTED state, depending on what the kernel currently says about the mount point. We use this | |
989 | * whenever we executed an operation, so that our internal state reflects what the kernel says again, after all | |
990 | * ultimately we just mirror the kernel's internal state on this. */ | |
991 | ||
992 | if (m->from_proc_self_mountinfo) | |
993 | mount_enter_mounted(m, f); | |
994 | else | |
995 | mount_enter_dead(m, f); | |
996 | } | |
997 | ||
998 | static int state_to_kill_operation(MountState state) { | |
999 | switch (state) { | |
1000 | ||
1001 | case MOUNT_REMOUNTING_SIGTERM: | |
a232ebcc ZJS |
1002 | return KILL_RESTART; |
1003 | ||
22af0e58 LP |
1004 | case MOUNT_UNMOUNTING_SIGTERM: |
1005 | return KILL_TERMINATE; | |
1006 | ||
1007 | case MOUNT_REMOUNTING_SIGKILL: | |
1008 | case MOUNT_UNMOUNTING_SIGKILL: | |
1009 | return KILL_KILL; | |
1010 | ||
1011 | default: | |
1012 | return _KILL_OPERATION_INVALID; | |
1013 | } | |
1014 | } | |
1015 | ||
9d2f5178 | 1016 | static void mount_enter_signal(Mount *m, MountState state, MountResult f) { |
e537352b LP |
1017 | int r; |
1018 | ||
1019 | assert(m); | |
1020 | ||
a0fef983 | 1021 | if (m->result == MOUNT_SUCCESS) |
9d2f5178 | 1022 | m->result = f; |
e537352b | 1023 | |
cd2086fe LP |
1024 | r = unit_kill_context( |
1025 | UNIT(m), | |
1026 | &m->kill_context, | |
22af0e58 | 1027 | state_to_kill_operation(state), |
7901288a LP |
1028 | /* main_pid= */ NULL, |
1029 | &m->control_pid, | |
1030 | /* main_pid_alien= */ false); | |
d30eb0b5 LP |
1031 | if (r < 0) { |
1032 | log_unit_warning_errno(UNIT(m), r, "Failed to kill processes: %m"); | |
cd2086fe | 1033 | goto fail; |
d30eb0b5 | 1034 | } |
e537352b | 1035 | |
cd2086fe | 1036 | if (r > 0) { |
e9276800 | 1037 | r = mount_arm_timer(m, /* relative= */ true, m->timeout_usec); |
d30eb0b5 LP |
1038 | if (r < 0) { |
1039 | log_unit_warning_errno(UNIT(m), r, "Failed to install timer: %m"); | |
80876c20 | 1040 | goto fail; |
d30eb0b5 | 1041 | } |
e537352b | 1042 | |
80876c20 | 1043 | mount_set_state(m, state); |
22af0e58 | 1044 | } else if (state == MOUNT_REMOUNTING_SIGTERM && m->kill_context.send_sigkill) |
ac84d1fb | 1045 | mount_enter_signal(m, MOUNT_REMOUNTING_SIGKILL, MOUNT_SUCCESS); |
22af0e58 | 1046 | else if (IN_SET(state, MOUNT_REMOUNTING_SIGTERM, MOUNT_REMOUNTING_SIGKILL)) |
9d2f5178 | 1047 | mount_enter_mounted(m, MOUNT_SUCCESS); |
22af0e58 | 1048 | else if (state == MOUNT_UNMOUNTING_SIGTERM && m->kill_context.send_sigkill) |
ac84d1fb | 1049 | mount_enter_signal(m, MOUNT_UNMOUNTING_SIGKILL, MOUNT_SUCCESS); |
80876c20 | 1050 | else |
22af0e58 | 1051 | mount_enter_dead_or_mounted(m, MOUNT_SUCCESS); |
e537352b LP |
1052 | |
1053 | return; | |
1054 | ||
1055 | fail: | |
22af0e58 | 1056 | mount_enter_dead_or_mounted(m, MOUNT_FAILURE_RESOURCES); |
5261ba90 TT |
1057 | } |
1058 | ||
d30eb0b5 LP |
1059 | static int mount_set_umount_command(Mount *m, ExecCommand *c) { |
1060 | int r; | |
1061 | ||
1062 | assert(m); | |
1063 | assert(c); | |
1064 | ||
1065 | r = exec_command_set(c, UMOUNT_PATH, m->where, "-c", NULL); | |
1066 | if (r < 0) | |
1067 | return r; | |
1068 | ||
1069 | if (m->lazy_unmount) { | |
1070 | r = exec_command_append(c, "-l", NULL); | |
1071 | if (r < 0) | |
1072 | return r; | |
1073 | } | |
1074 | ||
1075 | if (m->force_unmount) { | |
1076 | r = exec_command_append(c, "-f", NULL); | |
1077 | if (r < 0) | |
1078 | return r; | |
1079 | } | |
1080 | ||
1081 | return 0; | |
1082 | } | |
1083 | ||
9d2f5178 | 1084 | static void mount_enter_unmounting(Mount *m) { |
e537352b LP |
1085 | int r; |
1086 | ||
1087 | assert(m); | |
1088 | ||
7d54a03a LP |
1089 | /* Start counting our attempts */ |
1090 | if (!IN_SET(m->state, | |
1091 | MOUNT_UNMOUNTING, | |
1092 | MOUNT_UNMOUNTING_SIGTERM, | |
e323d2e4 | 1093 | MOUNT_UNMOUNTING_SIGKILL)) |
7d54a03a LP |
1094 | m->n_retry_umount = 0; |
1095 | ||
a16e1123 LP |
1096 | m->control_command_id = MOUNT_EXEC_UNMOUNT; |
1097 | m->control_command = m->exec_command + MOUNT_EXEC_UNMOUNT; | |
e537352b | 1098 | |
d30eb0b5 LP |
1099 | r = mount_set_umount_command(m, m->control_command); |
1100 | if (r < 0) { | |
1101 | log_unit_warning_errno(UNIT(m), r, "Failed to prepare umount command line: %m"); | |
e537352b | 1102 | goto fail; |
d30eb0b5 | 1103 | } |
e537352b | 1104 | |
a16e1123 | 1105 | mount_unwatch_control_pid(m); |
5e94833f | 1106 | |
7d54a03a | 1107 | r = mount_spawn(m, m->control_command, &m->control_pid); |
d30eb0b5 LP |
1108 | if (r < 0) { |
1109 | log_unit_warning_errno(UNIT(m), r, "Failed to spawn 'umount' task: %m"); | |
e537352b | 1110 | goto fail; |
d30eb0b5 | 1111 | } |
e537352b LP |
1112 | |
1113 | mount_set_state(m, MOUNT_UNMOUNTING); | |
e323d2e4 | 1114 | |
e537352b LP |
1115 | return; |
1116 | ||
1117 | fail: | |
22af0e58 | 1118 | mount_enter_dead_or_mounted(m, MOUNT_FAILURE_RESOURCES); |
e537352b LP |
1119 | } |
1120 | ||
d30eb0b5 LP |
1121 | static int mount_set_mount_command(Mount *m, ExecCommand *c, const MountParameters *p) { |
1122 | int r; | |
1123 | ||
1124 | assert(m); | |
1125 | assert(c); | |
1126 | assert(p); | |
1127 | ||
1128 | r = exec_command_set(c, MOUNT_PATH, p->what, m->where, NULL); | |
1129 | if (r < 0) | |
1130 | return r; | |
1131 | ||
1132 | if (m->sloppy_options) { | |
1133 | r = exec_command_append(c, "-s", NULL); | |
1134 | if (r < 0) | |
1135 | return r; | |
1136 | } | |
1137 | ||
1138 | if (m->read_write_only) { | |
1139 | r = exec_command_append(c, "-w", NULL); | |
1140 | if (r < 0) | |
1141 | return r; | |
1142 | } | |
1143 | ||
1144 | if (p->fstype) { | |
1145 | r = exec_command_append(c, "-t", p->fstype, NULL); | |
1146 | if (r < 0) | |
1147 | return r; | |
1148 | } | |
1149 | ||
1150 | _cleanup_free_ char *opts = NULL; | |
1151 | r = fstab_filter_options(p->options, "nofail\0" "noauto\0" "auto\0", NULL, NULL, NULL, &opts); | |
1152 | if (r < 0) | |
1153 | return r; | |
1154 | ||
1155 | if (!isempty(opts)) { | |
1156 | r = exec_command_append(c, "-o", opts, NULL); | |
1157 | if (r < 0) | |
1158 | return r; | |
1159 | } | |
1160 | ||
1161 | return 0; | |
1162 | } | |
1163 | ||
8d567588 | 1164 | static void mount_enter_mounting(Mount *m) { |
e537352b | 1165 | int r; |
cb39ed3f | 1166 | MountParameters *p; |
218cfe23 | 1167 | bool source_is_dir = true; |
e537352b LP |
1168 | |
1169 | assert(m); | |
1170 | ||
25cd4964 | 1171 | r = unit_fail_if_noncanonical(UNIT(m), m->where); |
f2341e0a LP |
1172 | if (r < 0) |
1173 | goto fail; | |
1174 | ||
218cfe23 DT |
1175 | p = get_mount_parameters_fragment(m); |
1176 | if (p && mount_is_bind(p)) { | |
1177 | r = is_dir(p->what, /* follow = */ true); | |
1178 | if (r < 0 && r != -ENOENT) | |
1179 | log_unit_info_errno(UNIT(m), r, "Failed to determine type of bind mount source '%s', ignoring: %m", p->what); | |
1180 | else if (r == 0) | |
1181 | source_is_dir = false; | |
1182 | } | |
3e5235b0 | 1183 | |
218cfe23 | 1184 | if (source_is_dir) |
ce427d0e | 1185 | r = mkdir_p_label(m->where, m->directory_mode); |
218cfe23 | 1186 | else |
ce427d0e DDM |
1187 | r = touch_file(m->where, /* parents = */ true, USEC_INFINITY, UID_INVALID, GID_INVALID, MODE_INVALID); |
1188 | if (r < 0 && r != -EEXIST) | |
1189 | log_unit_warning_errno(UNIT(m), r, "Failed to create mount point '%s', ignoring: %m", m->where); | |
218cfe23 DT |
1190 | |
1191 | if (source_is_dir) | |
1192 | unit_warn_if_dir_nonempty(UNIT(m), m->where); | |
4c425434 | 1193 | unit_warn_leftover_processes(UNIT(m), unit_log_leftover_process_start); |
a4634b21 LP |
1194 | |
1195 | m->control_command_id = MOUNT_EXEC_MOUNT; | |
1196 | m->control_command = m->exec_command + MOUNT_EXEC_MOUNT; | |
1197 | ||
cb39ed3f | 1198 | /* Create the source directory for bind-mounts if needed */ |
5dc60faa AP |
1199 | if (p && mount_is_bind(p)) { |
1200 | r = mkdir_p_label(p->what, m->directory_mode); | |
237ecfee | 1201 | /* mkdir_p_label() can return -EEXIST if the target path exists and is not a directory - which is |
574febda YW |
1202 | * totally OK, in case the user wants us to overmount a non-directory inode. Also -EROFS can be |
1203 | * returned on read-only filesystem. Moreover, -EACCES (and also maybe -EPERM?) may be returned | |
1204 | * when the path is on NFS. See issue #24120. All such errors will be logged in the debug level. */ | |
e5e6b7c2 | 1205 | if (r < 0 && r != -EEXIST) |
574febda YW |
1206 | log_unit_full_errno(UNIT(m), |
1207 | (r == -EROFS || ERRNO_IS_PRIVILEGE(r)) ? LOG_DEBUG : LOG_WARNING, | |
1208 | r, "Failed to make bind mount source '%s', ignoring: %m", p->what); | |
5dc60faa | 1209 | } |
5261ba90 | 1210 | |
b294b79f | 1211 | if (p) { |
d30eb0b5 LP |
1212 | r = mount_set_mount_command(m, m->control_command, p); |
1213 | if (r < 0) { | |
1214 | log_unit_warning_errno(UNIT(m), r, "Failed to prepare mount command line: %m"); | |
17a1c597 | 1215 | goto fail; |
d30eb0b5 LP |
1216 | } |
1217 | } else { | |
1218 | r = log_unit_warning_errno(UNIT(m), SYNTHETIC_ERRNO(ENOENT), "No mount parameters to operate on."); | |
e537352b | 1219 | goto fail; |
d30eb0b5 | 1220 | } |
e537352b | 1221 | |
a16e1123 | 1222 | mount_unwatch_control_pid(m); |
5e94833f | 1223 | |
257f1d8e | 1224 | r = mount_spawn(m, m->control_command, &m->control_pid); |
d30eb0b5 LP |
1225 | if (r < 0) { |
1226 | log_unit_warning_errno(UNIT(m), r, "Failed to spawn 'mount' task: %m"); | |
e537352b | 1227 | goto fail; |
d30eb0b5 | 1228 | } |
e537352b LP |
1229 | |
1230 | mount_set_state(m, MOUNT_MOUNTING); | |
e537352b LP |
1231 | return; |
1232 | ||
1233 | fail: | |
22af0e58 | 1234 | mount_enter_dead_or_mounted(m, MOUNT_FAILURE_RESOURCES); |
e537352b LP |
1235 | } |
1236 | ||
850b7410 LP |
1237 | static void mount_set_reload_result(Mount *m, MountResult result) { |
1238 | assert(m); | |
1239 | ||
1240 | /* Only store the first error we encounter */ | |
1241 | if (m->reload_result != MOUNT_SUCCESS) | |
1242 | return; | |
1243 | ||
1244 | m->reload_result = result; | |
1245 | } | |
1246 | ||
9d2f5178 | 1247 | static void mount_enter_remounting(Mount *m) { |
e537352b | 1248 | int r; |
b294b79f | 1249 | MountParameters *p; |
e537352b LP |
1250 | |
1251 | assert(m); | |
1252 | ||
850b7410 LP |
1253 | /* Reset reload result when we are about to start a new remount operation */ |
1254 | m->reload_result = MOUNT_SUCCESS; | |
1255 | ||
a16e1123 LP |
1256 | m->control_command_id = MOUNT_EXEC_REMOUNT; |
1257 | m->control_command = m->exec_command + MOUNT_EXEC_REMOUNT; | |
e537352b | 1258 | |
b294b79f MO |
1259 | p = get_mount_parameters_fragment(m); |
1260 | if (p) { | |
e537352b LP |
1261 | const char *o; |
1262 | ||
b294b79f MO |
1263 | if (p->options) |
1264 | o = strjoina("remount,", p->options); | |
718db961 | 1265 | else |
e537352b LP |
1266 | o = "remount"; |
1267 | ||
f00929ad | 1268 | r = exec_command_set(m->control_command, MOUNT_PATH, |
b294b79f | 1269 | p->what, m->where, |
e86b3761 | 1270 | "-o", o, NULL); |
e86b3761 ZJS |
1271 | if (r >= 0 && m->sloppy_options) |
1272 | r = exec_command_append(m->control_command, "-s", NULL); | |
c600357b MH |
1273 | if (r >= 0 && m->read_write_only) |
1274 | r = exec_command_append(m->control_command, "-w", NULL); | |
b294b79f MO |
1275 | if (r >= 0 && p->fstype) |
1276 | r = exec_command_append(m->control_command, "-t", p->fstype, NULL); | |
d30eb0b5 LP |
1277 | if (r < 0) { |
1278 | log_unit_warning_errno(UNIT(m), r, "Failed to prepare remount command line: %m"); | |
1279 | goto fail; | |
1280 | } | |
1281 | ||
1282 | } else { | |
1283 | r = log_unit_warning_errno(UNIT(m), SYNTHETIC_ERRNO(ENOENT), "No mount parameters to operate on."); | |
e537352b | 1284 | goto fail; |
d30eb0b5 | 1285 | } |
e537352b | 1286 | |
a16e1123 | 1287 | mount_unwatch_control_pid(m); |
5e94833f | 1288 | |
718db961 | 1289 | r = mount_spawn(m, m->control_command, &m->control_pid); |
d30eb0b5 LP |
1290 | if (r < 0) { |
1291 | log_unit_warning_errno(UNIT(m), r, "Failed to spawn 'remount' task: %m"); | |
e537352b | 1292 | goto fail; |
d30eb0b5 | 1293 | } |
e537352b LP |
1294 | |
1295 | mount_set_state(m, MOUNT_REMOUNTING); | |
e537352b LP |
1296 | return; |
1297 | ||
1298 | fail: | |
850b7410 | 1299 | mount_set_reload_result(m, MOUNT_FAILURE_RESOURCES); |
22af0e58 | 1300 | mount_enter_dead_or_mounted(m, MOUNT_SUCCESS); |
e537352b LP |
1301 | } |
1302 | ||
7eba1463 LP |
1303 | static void mount_cycle_clear(Mount *m) { |
1304 | assert(m); | |
1305 | ||
1306 | /* Clear all state we shall forget for this new cycle */ | |
1307 | ||
1308 | m->result = MOUNT_SUCCESS; | |
1309 | m->reload_result = MOUNT_SUCCESS; | |
1310 | exec_command_reset_status_array(m->exec_command, _MOUNT_EXEC_COMMAND_MAX); | |
1311 | UNIT(m)->reset_accounting = true; | |
1312 | } | |
1313 | ||
e537352b LP |
1314 | static int mount_start(Unit *u) { |
1315 | Mount *m = MOUNT(u); | |
07299350 | 1316 | int r; |
e537352b LP |
1317 | |
1318 | assert(m); | |
1319 | ||
1320 | /* We cannot fulfill this request right now, try again later | |
1321 | * please! */ | |
f2aed307 LP |
1322 | if (IN_SET(m->state, |
1323 | MOUNT_UNMOUNTING, | |
1324 | MOUNT_UNMOUNTING_SIGTERM, | |
17e9d53d YW |
1325 | MOUNT_UNMOUNTING_SIGKILL, |
1326 | MOUNT_CLEANING)) | |
e537352b LP |
1327 | return -EAGAIN; |
1328 | ||
1329 | /* Already on it! */ | |
db39a627 | 1330 | if (IN_SET(m->state, MOUNT_MOUNTING, MOUNT_MOUNTING_DONE)) |
e537352b LP |
1331 | return 0; |
1332 | ||
f2aed307 | 1333 | assert(IN_SET(m->state, MOUNT_DEAD, MOUNT_FAILED)); |
e537352b | 1334 | |
4b58153d LP |
1335 | r = unit_acquire_invocation_id(u); |
1336 | if (r < 0) | |
1337 | return r; | |
1338 | ||
7eba1463 | 1339 | mount_cycle_clear(m); |
8d567588 | 1340 | mount_enter_mounting(m); |
7eba1463 | 1341 | |
82a2b6bb | 1342 | return 1; |
e537352b LP |
1343 | } |
1344 | ||
1345 | static int mount_stop(Unit *u) { | |
1346 | Mount *m = MOUNT(u); | |
1347 | ||
1348 | assert(m); | |
1349 | ||
1e122561 YW |
1350 | /* When we directly call umount() for a path, then the state of the corresponding mount unit may be |
1351 | * outdated. Let's re-read mountinfo now and update the state. */ | |
1352 | if (m->invalidated_state) | |
1353 | (void) mount_process_proc_self_mountinfo(u->manager); | |
1354 | ||
22af0e58 LP |
1355 | switch (m->state) { |
1356 | ||
1357 | case MOUNT_UNMOUNTING: | |
1358 | case MOUNT_UNMOUNTING_SIGKILL: | |
1359 | case MOUNT_UNMOUNTING_SIGTERM: | |
1360 | /* Already on it */ | |
e537352b LP |
1361 | return 0; |
1362 | ||
22af0e58 LP |
1363 | case MOUNT_MOUNTING: |
1364 | case MOUNT_MOUNTING_DONE: | |
1365 | case MOUNT_REMOUNTING: | |
1366 | /* If we are still waiting for /bin/mount, we go directly into kill mode. */ | |
1367 | mount_enter_signal(m, MOUNT_UNMOUNTING_SIGTERM, MOUNT_SUCCESS); | |
1368 | return 0; | |
e537352b | 1369 | |
22af0e58 LP |
1370 | case MOUNT_REMOUNTING_SIGTERM: |
1371 | /* If we are already waiting for a hung remount, convert this to the matching unmounting state */ | |
1372 | mount_set_state(m, MOUNT_UNMOUNTING_SIGTERM); | |
1373 | return 0; | |
1374 | ||
1375 | case MOUNT_REMOUNTING_SIGKILL: | |
1376 | /* as above */ | |
1377 | mount_set_state(m, MOUNT_UNMOUNTING_SIGKILL); | |
1378 | return 0; | |
1379 | ||
1380 | case MOUNT_MOUNTED: | |
1381 | mount_enter_unmounting(m); | |
1382 | return 1; | |
1383 | ||
17e9d53d YW |
1384 | case MOUNT_CLEANING: |
1385 | /* If we are currently cleaning, then abort it, brutally. */ | |
1386 | mount_enter_signal(m, MOUNT_UNMOUNTING_SIGKILL, MOUNT_SUCCESS); | |
1387 | return 0; | |
1388 | ||
1e122561 YW |
1389 | case MOUNT_DEAD: |
1390 | case MOUNT_FAILED: | |
1391 | /* The mount has just been unmounted by somebody else. */ | |
1392 | return 0; | |
1393 | ||
22af0e58 | 1394 | default: |
04499a70 | 1395 | assert_not_reached(); |
22af0e58 | 1396 | } |
e537352b LP |
1397 | } |
1398 | ||
1399 | static int mount_reload(Unit *u) { | |
1400 | Mount *m = MOUNT(u); | |
1401 | ||
1402 | assert(m); | |
e537352b LP |
1403 | assert(m->state == MOUNT_MOUNTED); |
1404 | ||
9d2f5178 | 1405 | mount_enter_remounting(m); |
22af0e58 | 1406 | |
2d018ae2 | 1407 | return 1; |
e537352b LP |
1408 | } |
1409 | ||
a16e1123 LP |
1410 | static int mount_serialize(Unit *u, FILE *f, FDSet *fds) { |
1411 | Mount *m = MOUNT(u); | |
1412 | ||
1413 | assert(m); | |
1414 | assert(f); | |
1415 | assert(fds); | |
1416 | ||
d68c645b LP |
1417 | (void) serialize_item(f, "state", mount_state_to_string(m->state)); |
1418 | (void) serialize_item(f, "result", mount_result_to_string(m->result)); | |
1419 | (void) serialize_item(f, "reload-result", mount_result_to_string(m->reload_result)); | |
2c09fb81 | 1420 | (void) serialize_item_format(f, "n-retry-umount", "%u", m->n_retry_umount); |
2a7451dc | 1421 | (void) serialize_pidref(f, fds, "control-pid", &m->control_pid); |
a16e1123 LP |
1422 | |
1423 | if (m->control_command_id >= 0) | |
d68c645b | 1424 | (void) serialize_item(f, "control-command", mount_exec_command_to_string(m->control_command_id)); |
a16e1123 LP |
1425 | |
1426 | return 0; | |
1427 | } | |
1428 | ||
1429 | static int mount_deserialize_item(Unit *u, const char *key, const char *value, FDSet *fds) { | |
1430 | Mount *m = MOUNT(u); | |
2c09fb81 | 1431 | int r; |
a16e1123 | 1432 | |
c73f413d | 1433 | assert(m); |
a16e1123 LP |
1434 | assert(u); |
1435 | assert(key); | |
1436 | assert(value); | |
1437 | assert(fds); | |
1438 | ||
1439 | if (streq(key, "state")) { | |
1440 | MountState state; | |
1441 | ||
7fb1d980 YW |
1442 | state = mount_state_from_string(value); |
1443 | if (state < 0) | |
1444 | log_unit_debug_errno(u, state, "Failed to parse state value: %s", value); | |
a16e1123 LP |
1445 | else |
1446 | m->deserialized_state = state; | |
2c09fb81 | 1447 | |
9d2f5178 LP |
1448 | } else if (streq(key, "result")) { |
1449 | MountResult f; | |
a16e1123 | 1450 | |
9d2f5178 LP |
1451 | f = mount_result_from_string(value); |
1452 | if (f < 0) | |
7fb1d980 | 1453 | log_unit_debug_errno(u, f, "Failed to parse result value: %s", value); |
9d2f5178 LP |
1454 | else if (f != MOUNT_SUCCESS) |
1455 | m->result = f; | |
1456 | ||
1457 | } else if (streq(key, "reload-result")) { | |
1458 | MountResult f; | |
1459 | ||
1460 | f = mount_result_from_string(value); | |
1461 | if (f < 0) | |
7fb1d980 | 1462 | log_unit_debug_errno(u, f, "Failed to parse reload result value: %s", value); |
9d2f5178 LP |
1463 | else if (f != MOUNT_SUCCESS) |
1464 | m->reload_result = f; | |
a16e1123 | 1465 | |
2c09fb81 LP |
1466 | } else if (streq(key, "n-retry-umount")) { |
1467 | ||
1468 | r = safe_atou(value, &m->n_retry_umount); | |
1469 | if (r < 0) | |
7fb1d980 | 1470 | log_unit_debug_errno(u, r, "Failed to parse n-retry-umount value: %s", value); |
2c09fb81 | 1471 | |
a16e1123 | 1472 | } else if (streq(key, "control-pid")) { |
a16e1123 | 1473 | |
360f384f | 1474 | pidref_done(&m->control_pid); |
2a7451dc | 1475 | (void) deserialize_pidref(fds, value, &m->control_pid); |
3f459cd9 | 1476 | |
a16e1123 LP |
1477 | } else if (streq(key, "control-command")) { |
1478 | MountExecCommand id; | |
1479 | ||
f2341e0a LP |
1480 | id = mount_exec_command_from_string(value); |
1481 | if (id < 0) | |
7fb1d980 | 1482 | log_unit_debug_errno(u, id, "Failed to parse exec-command value: %s", value); |
a16e1123 LP |
1483 | else { |
1484 | m->control_command_id = id; | |
1485 | m->control_command = m->exec_command + id; | |
1486 | } | |
a16e1123 | 1487 | } else |
f2341e0a | 1488 | log_unit_debug(u, "Unknown serialization key: %s", key); |
a16e1123 LP |
1489 | |
1490 | return 0; | |
1491 | } | |
1492 | ||
d1e8e8b5 | 1493 | static UnitActiveState mount_active_state(Unit *u) { |
e537352b LP |
1494 | assert(u); |
1495 | ||
1496 | return state_translation_table[MOUNT(u)->state]; | |
1497 | } | |
1498 | ||
d1e8e8b5 | 1499 | static const char *mount_sub_state_to_string(Unit *u) { |
10a94420 LP |
1500 | assert(u); |
1501 | ||
a16e1123 | 1502 | return mount_state_to_string(MOUNT(u)->state); |
10a94420 LP |
1503 | } |
1504 | ||
d1e8e8b5 | 1505 | static bool mount_may_gc(Unit *u) { |
701cc384 LP |
1506 | Mount *m = MOUNT(u); |
1507 | ||
1508 | assert(m); | |
1509 | ||
f2f725e5 ZJS |
1510 | if (m->from_proc_self_mountinfo) |
1511 | return false; | |
1512 | ||
1513 | return true; | |
701cc384 LP |
1514 | } |
1515 | ||
e537352b LP |
1516 | static void mount_sigchld_event(Unit *u, pid_t pid, int code, int status) { |
1517 | Mount *m = MOUNT(u); | |
9d2f5178 | 1518 | MountResult f; |
e537352b LP |
1519 | |
1520 | assert(m); | |
1521 | assert(pid >= 0); | |
1522 | ||
360f384f | 1523 | if (pid != m->control_pid.pid) |
8c47c732 | 1524 | return; |
e537352b | 1525 | |
35080486 LP |
1526 | /* So here's the thing, we really want to know before /usr/bin/mount or /usr/bin/umount exit whether |
1527 | * they established/remove a mount. This is important when mounting, but even more so when unmounting | |
1528 | * since we need to deal with nested mounts and otherwise cannot safely determine whether to repeat | |
1529 | * the unmounts. In theory, the kernel fires /proc/self/mountinfo changes off before returning from | |
1530 | * the mount() or umount() syscalls, and thus we should see the changes to the proc file before we | |
1531 | * process the waitid() for the /usr/bin/(u)mount processes. However, this is unfortunately racy: we | |
1532 | * have to waitid() for processes using P_ALL (since we need to reap unexpected children that got | |
1533 | * reparented to PID 1), but when using P_ALL we might end up reaping processes that terminated just | |
1534 | * instants ago, i.e. already after our last event loop iteration (i.e. after the last point we might | |
1535 | * have noticed /proc/self/mountinfo events via epoll). This means event loop priorities for | |
1536 | * processing SIGCHLD vs. /proc/self/mountinfo IO events are not as relevant as we want. To fix that | |
1537 | * race, let's explicitly scan /proc/self/mountinfo before we start processing /usr/bin/(u)mount | |
1538 | * dying. It's ugly, but it makes our ordering systematic again, and makes sure we always see | |
1539 | * /proc/self/mountinfo changes before our mount/umount exits. */ | |
1540 | (void) mount_process_proc_self_mountinfo(u->manager); | |
1541 | ||
360f384f | 1542 | pidref_done(&m->control_pid); |
e537352b | 1543 | |
1f0958f6 | 1544 | if (is_clean_exit(code, status, EXIT_CLEAN_COMMAND, NULL)) |
9d2f5178 LP |
1545 | f = MOUNT_SUCCESS; |
1546 | else if (code == CLD_EXITED) | |
1547 | f = MOUNT_FAILURE_EXIT_CODE; | |
1548 | else if (code == CLD_KILLED) | |
1549 | f = MOUNT_FAILURE_SIGNAL; | |
1550 | else if (code == CLD_DUMPED) | |
1551 | f = MOUNT_FAILURE_CORE_DUMP; | |
1552 | else | |
04499a70 | 1553 | assert_not_reached(); |
9d2f5178 | 1554 | |
850b7410 LP |
1555 | if (IN_SET(m->state, MOUNT_REMOUNTING, MOUNT_REMOUNTING_SIGKILL, MOUNT_REMOUNTING_SIGTERM)) |
1556 | mount_set_reload_result(m, f); | |
1557 | else if (m->result == MOUNT_SUCCESS) | |
9d2f5178 | 1558 | m->result = f; |
8c47c732 | 1559 | |
a16e1123 | 1560 | if (m->control_command) { |
6ea832a2 | 1561 | exec_status_exit(&m->control_command->exec_status, &m->exec_context, pid, code, status); |
9d2f5178 | 1562 | |
a16e1123 LP |
1563 | m->control_command = NULL; |
1564 | m->control_command_id = _MOUNT_EXEC_COMMAND_INVALID; | |
1565 | } | |
1566 | ||
91bbd9b7 | 1567 | unit_log_process_exit( |
5cc2cd1c | 1568 | u, |
91bbd9b7 LP |
1569 | "Mount process", |
1570 | mount_exec_command_to_string(m->control_command_id), | |
5cc2cd1c | 1571 | f == MOUNT_SUCCESS, |
91bbd9b7 | 1572 | code, status); |
e537352b | 1573 | |
006aabbd AJ |
1574 | /* Note that due to the io event priority logic, we can be sure the new mountinfo is loaded |
1575 | * before we process the SIGCHLD for the mount command. */ | |
e537352b LP |
1576 | |
1577 | switch (m->state) { | |
1578 | ||
1579 | case MOUNT_MOUNTING: | |
006aabbd | 1580 | /* Our mount point has not appeared in mountinfo. Something went wrong. */ |
e537352b | 1581 | |
006aabbd AJ |
1582 | if (f == MOUNT_SUCCESS) { |
1583 | /* Either /bin/mount has an unexpected definition of success, | |
1584 | * or someone raced us and we lost. */ | |
1585 | log_unit_warning(UNIT(m), "Mount process finished, but there is no mount."); | |
1586 | f = MOUNT_FAILURE_PROTOCOL; | |
1587 | } | |
1588 | mount_enter_dead(m, f); | |
1589 | break; | |
1590 | ||
1591 | case MOUNT_MOUNTING_DONE: | |
1592 | mount_enter_mounted(m, f); | |
e537352b LP |
1593 | break; |
1594 | ||
e2f3b44c | 1595 | case MOUNT_REMOUNTING: |
e2f3b44c | 1596 | case MOUNT_REMOUNTING_SIGTERM: |
22af0e58 LP |
1597 | case MOUNT_REMOUNTING_SIGKILL: |
1598 | mount_enter_dead_or_mounted(m, MOUNT_SUCCESS); | |
e2f3b44c LP |
1599 | break; |
1600 | ||
e537352b | 1601 | case MOUNT_UNMOUNTING: |
e537352b | 1602 | |
3cc96856 | 1603 | if (f == MOUNT_SUCCESS && m->from_proc_self_mountinfo) { |
22af0e58 LP |
1604 | |
1605 | /* Still a mount point? If so, let's try again. Most likely there were multiple mount points | |
57018361 AJ |
1606 | * stacked on top of each other. We might exceed the timeout specified by the user overall, |
1607 | * but we will stop as soon as any one umount times out. */ | |
22af0e58 LP |
1608 | |
1609 | if (m->n_retry_umount < RETRY_UMOUNT_MAX) { | |
1610 | log_unit_debug(u, "Mount still present, trying again."); | |
1611 | m->n_retry_umount++; | |
1612 | mount_enter_unmounting(m); | |
1613 | } else { | |
006aabbd | 1614 | log_unit_warning(u, "Mount still present after %u attempts to unmount, giving up.", m->n_retry_umount); |
22af0e58 LP |
1615 | mount_enter_mounted(m, f); |
1616 | } | |
1617 | } else | |
3cc96856 | 1618 | mount_enter_dead_or_mounted(m, f); |
22af0e58 | 1619 | |
e537352b | 1620 | break; |
57018361 AJ |
1621 | |
1622 | case MOUNT_UNMOUNTING_SIGKILL: | |
1623 | case MOUNT_UNMOUNTING_SIGTERM: | |
1624 | mount_enter_dead_or_mounted(m, f); | |
1625 | break; | |
e537352b | 1626 | |
17e9d53d YW |
1627 | case MOUNT_CLEANING: |
1628 | if (m->clean_result == MOUNT_SUCCESS) | |
1629 | m->clean_result = f; | |
1630 | ||
1631 | mount_enter_dead(m, MOUNT_SUCCESS); | |
1632 | break; | |
1633 | ||
e537352b | 1634 | default: |
04499a70 | 1635 | assert_not_reached(); |
e537352b | 1636 | } |
c4e2ceae LP |
1637 | |
1638 | /* Notify clients about changed exit status */ | |
1639 | unit_add_to_dbus_queue(u); | |
e537352b LP |
1640 | } |
1641 | ||
718db961 LP |
1642 | static int mount_dispatch_timer(sd_event_source *source, usec_t usec, void *userdata) { |
1643 | Mount *m = MOUNT(userdata); | |
e537352b LP |
1644 | |
1645 | assert(m); | |
718db961 | 1646 | assert(m->timer_event_source == source); |
e537352b LP |
1647 | |
1648 | switch (m->state) { | |
1649 | ||
1650 | case MOUNT_MOUNTING: | |
1651 | case MOUNT_MOUNTING_DONE: | |
22af0e58 LP |
1652 | log_unit_warning(UNIT(m), "Mounting timed out. Terminating."); |
1653 | mount_enter_signal(m, MOUNT_UNMOUNTING_SIGTERM, MOUNT_FAILURE_TIMEOUT); | |
e537352b LP |
1654 | break; |
1655 | ||
1656 | case MOUNT_REMOUNTING: | |
79aafbd1 | 1657 | log_unit_warning(UNIT(m), "Remounting timed out. Terminating remount process."); |
22af0e58 LP |
1658 | mount_set_reload_result(m, MOUNT_FAILURE_TIMEOUT); |
1659 | mount_enter_signal(m, MOUNT_REMOUNTING_SIGTERM, MOUNT_SUCCESS); | |
e537352b LP |
1660 | break; |
1661 | ||
22af0e58 LP |
1662 | case MOUNT_REMOUNTING_SIGTERM: |
1663 | mount_set_reload_result(m, MOUNT_FAILURE_TIMEOUT); | |
e537352b | 1664 | |
4819ff03 | 1665 | if (m->kill_context.send_sigkill) { |
22af0e58 LP |
1666 | log_unit_warning(UNIT(m), "Remounting timed out. Killing."); |
1667 | mount_enter_signal(m, MOUNT_REMOUNTING_SIGKILL, MOUNT_SUCCESS); | |
ba035df2 | 1668 | } else { |
22af0e58 LP |
1669 | log_unit_warning(UNIT(m), "Remounting timed out. Skipping SIGKILL. Ignoring."); |
1670 | mount_enter_dead_or_mounted(m, MOUNT_SUCCESS); | |
ba035df2 | 1671 | } |
e537352b LP |
1672 | break; |
1673 | ||
22af0e58 LP |
1674 | case MOUNT_REMOUNTING_SIGKILL: |
1675 | mount_set_reload_result(m, MOUNT_FAILURE_TIMEOUT); | |
ba035df2 | 1676 | |
22af0e58 LP |
1677 | log_unit_warning(UNIT(m), "Mount process still around after SIGKILL. Ignoring."); |
1678 | mount_enter_dead_or_mounted(m, MOUNT_SUCCESS); | |
1679 | break; | |
1680 | ||
1681 | case MOUNT_UNMOUNTING: | |
79aafbd1 | 1682 | log_unit_warning(UNIT(m), "Unmounting timed out. Terminating."); |
22af0e58 | 1683 | mount_enter_signal(m, MOUNT_UNMOUNTING_SIGTERM, MOUNT_FAILURE_TIMEOUT); |
e537352b LP |
1684 | break; |
1685 | ||
1686 | case MOUNT_UNMOUNTING_SIGTERM: | |
4819ff03 | 1687 | if (m->kill_context.send_sigkill) { |
22af0e58 | 1688 | log_unit_warning(UNIT(m), "Mount process timed out. Killing."); |
9d2f5178 | 1689 | mount_enter_signal(m, MOUNT_UNMOUNTING_SIGKILL, MOUNT_FAILURE_TIMEOUT); |
ba035df2 | 1690 | } else { |
22af0e58 LP |
1691 | log_unit_warning(UNIT(m), "Mount process timed out. Skipping SIGKILL. Ignoring."); |
1692 | mount_enter_dead_or_mounted(m, MOUNT_FAILURE_TIMEOUT); | |
ba035df2 | 1693 | } |
e537352b LP |
1694 | break; |
1695 | ||
e537352b | 1696 | case MOUNT_UNMOUNTING_SIGKILL: |
22af0e58 LP |
1697 | log_unit_warning(UNIT(m), "Mount process still around after SIGKILL. Ignoring."); |
1698 | mount_enter_dead_or_mounted(m, MOUNT_FAILURE_TIMEOUT); | |
e537352b LP |
1699 | break; |
1700 | ||
17e9d53d YW |
1701 | case MOUNT_CLEANING: |
1702 | log_unit_warning(UNIT(m), "Cleaning timed out. killing."); | |
1703 | ||
1704 | if (m->clean_result == MOUNT_SUCCESS) | |
1705 | m->clean_result = MOUNT_FAILURE_TIMEOUT; | |
1706 | ||
1707 | mount_enter_signal(m, MOUNT_UNMOUNTING_SIGKILL, 0); | |
1708 | break; | |
1709 | ||
e537352b | 1710 | default: |
04499a70 | 1711 | assert_not_reached(); |
e537352b | 1712 | } |
718db961 LP |
1713 | |
1714 | return 0; | |
e537352b LP |
1715 | } |
1716 | ||
03b8cfed | 1717 | static int mount_setup_new_unit( |
839ee058 LP |
1718 | Manager *m, |
1719 | const char *name, | |
03b8cfed FB |
1720 | const char *what, |
1721 | const char *where, | |
1722 | const char *options, | |
1723 | const char *fstype, | |
ec88d1ea | 1724 | MountProcFlags *ret_flags, |
839ee058 | 1725 | Unit **ret) { |
03b8cfed | 1726 | |
839ee058 | 1727 | _cleanup_(unit_freep) Unit *u = NULL; |
bbee24bc | 1728 | int r; |
03b8cfed | 1729 | |
839ee058 LP |
1730 | assert(m); |
1731 | assert(name); | |
ec88d1ea | 1732 | assert(ret_flags); |
839ee058 LP |
1733 | assert(ret); |
1734 | ||
1735 | r = unit_new_for_name(m, sizeof(Mount), name, &u); | |
1736 | if (r < 0) | |
1737 | return r; | |
03b8cfed | 1738 | |
e10fe042 LP |
1739 | r = free_and_strdup(&u->source_path, "/proc/self/mountinfo"); |
1740 | if (r < 0) | |
1741 | return r; | |
03b8cfed | 1742 | |
e10fe042 LP |
1743 | r = free_and_strdup(&MOUNT(u)->where, where); |
1744 | if (r < 0) | |
1745 | return r; | |
03b8cfed | 1746 | |
9ddaa3e4 | 1747 | r = update_parameters_proc_self_mountinfo(MOUNT(u), what, options, fstype); |
bbee24bc LP |
1748 | if (r < 0) |
1749 | return r; | |
03b8cfed | 1750 | |
09f4d843 ZJS |
1751 | /* This unit was generated because /proc/self/mountinfo reported it. Remember this, so that by the |
1752 | * time we load the unit file for it (and thus add in extra deps right after) we know what source to | |
1753 | * attributes the deps to. */ | |
6d7e89b0 LP |
1754 | MOUNT(u)->from_proc_self_mountinfo = true; |
1755 | ||
b9e6d23d YW |
1756 | r = mount_add_non_exec_dependencies(MOUNT(u)); |
1757 | if (r < 0) | |
1758 | return r; | |
1759 | ||
09f4d843 ZJS |
1760 | /* We have only allocated the stub now, let's enqueue this unit for loading now, so that everything |
1761 | * else is loaded in now. */ | |
cfcd4318 | 1762 | unit_add_to_load_queue(u); |
26e35b16 | 1763 | |
ec88d1ea | 1764 | *ret_flags = MOUNT_PROC_IS_MOUNTED | MOUNT_PROC_JUST_MOUNTED | MOUNT_PROC_JUST_CHANGED; |
839ee058 | 1765 | *ret = TAKE_PTR(u); |
03b8cfed FB |
1766 | return 0; |
1767 | } | |
1768 | ||
1769 | static int mount_setup_existing_unit( | |
1770 | Unit *u, | |
1771 | const char *what, | |
1772 | const char *where, | |
1773 | const char *options, | |
1774 | const char *fstype, | |
ec88d1ea | 1775 | MountProcFlags *ret_flags) { |
03b8cfed | 1776 | |
bbee24bc | 1777 | int r; |
03b8cfed FB |
1778 | |
1779 | assert(u); | |
4bb68f2f | 1780 | assert(ret_flags); |
03b8cfed FB |
1781 | |
1782 | if (!MOUNT(u)->where) { | |
1783 | MOUNT(u)->where = strdup(where); | |
1784 | if (!MOUNT(u)->where) | |
1785 | return -ENOMEM; | |
1786 | } | |
1787 | ||
4bb68f2f LP |
1788 | /* In case we have multiple mounts established on the same mount point, let's merge flags set already |
1789 | * for the current unit. Note that the flags field is reset on each iteration of reading | |
1790 | * /proc/self/mountinfo, hence we know for sure anything already set here is from the current | |
1791 | * iteration and thus worthy of taking into account. */ | |
1792 | MountProcFlags flags = | |
1793 | MOUNT(u)->proc_flags | MOUNT_PROC_IS_MOUNTED; | |
1794 | ||
9ddaa3e4 | 1795 | r = update_parameters_proc_self_mountinfo(MOUNT(u), what, options, fstype); |
bbee24bc LP |
1796 | if (r < 0) |
1797 | return r; | |
ec88d1ea LP |
1798 | if (r > 0) |
1799 | flags |= MOUNT_PROC_JUST_CHANGED; | |
03b8cfed | 1800 | |
4bb68f2f LP |
1801 | /* There are two conditions when we consider a mount point just mounted: when we haven't seen it in |
1802 | * /proc/self/mountinfo before or when MOUNT_MOUNTING is our current state. Why bother with the | |
1803 | * latter? Shouldn't that be covered by the former? No, during reload it is not because we might then | |
1804 | * encounter a new /proc/self/mountinfo in combination with an old mount unit state (since it stems | |
1805 | * from the serialized state), and need to catch up. Since we know that the MOUNT_MOUNTING state is | |
1806 | * reached when we wait for the mount to appear we hence can assume that if we are in it, we are | |
1807 | * actually seeing it established for the first time. */ | |
1808 | if (!MOUNT(u)->from_proc_self_mountinfo || MOUNT(u)->state == MOUNT_MOUNTING) | |
ec88d1ea | 1809 | flags |= MOUNT_PROC_JUST_MOUNTED; |
d253a45e YW |
1810 | |
1811 | MOUNT(u)->from_proc_self_mountinfo = true; | |
03b8cfed | 1812 | |
f8064c4f LP |
1813 | if (IN_SET(u->load_state, UNIT_NOT_FOUND, UNIT_BAD_SETTING, UNIT_ERROR)) { |
1814 | /* The unit was previously not found or otherwise not loaded. Now that the unit shows up in | |
1815 | * /proc/self/mountinfo we should reconsider it this, hence set it to UNIT_LOADED. */ | |
03b8cfed FB |
1816 | u->load_state = UNIT_LOADED; |
1817 | u->load_error = 0; | |
1818 | ||
ec88d1ea | 1819 | flags |= MOUNT_PROC_JUST_CHANGED; |
03b8cfed FB |
1820 | } |
1821 | ||
ec88d1ea | 1822 | if (FLAGS_SET(flags, MOUNT_PROC_JUST_CHANGED)) { |
a3742204 LP |
1823 | /* If things changed, then make sure that all deps are regenerated. Let's |
1824 | * first remove all automatic deps, and then add in the new ones. */ | |
bf7eedbf | 1825 | r = mount_add_non_exec_dependencies(MOUNT(u)); |
a3742204 LP |
1826 | if (r < 0) |
1827 | return r; | |
1828 | } | |
03b8cfed | 1829 | |
ec88d1ea | 1830 | *ret_flags = flags; |
03b8cfed FB |
1831 | return 0; |
1832 | } | |
1833 | ||
628c89cc | 1834 | static int mount_setup_unit( |
e537352b LP |
1835 | Manager *m, |
1836 | const char *what, | |
1837 | const char *where, | |
1838 | const char *options, | |
1839 | const char *fstype, | |
e537352b | 1840 | bool set_flags) { |
057d9ab8 | 1841 | |
03b8cfed | 1842 | _cleanup_free_ char *e = NULL; |
ec88d1ea | 1843 | MountProcFlags flags; |
057d9ab8 LP |
1844 | Unit *u; |
1845 | int r; | |
b08d03ff | 1846 | |
f50e0a01 | 1847 | assert(m); |
b08d03ff LP |
1848 | assert(what); |
1849 | assert(where); | |
e537352b LP |
1850 | assert(options); |
1851 | assert(fstype); | |
1852 | ||
e537352b LP |
1853 | /* Ignore API mount points. They should never be referenced in |
1854 | * dependencies ever. */ | |
33ff02c9 | 1855 | if (mount_point_is_api(where) || mount_point_ignore(where)) |
57f2a956 | 1856 | return 0; |
b08d03ff | 1857 | |
8d567588 LP |
1858 | if (streq(fstype, "autofs")) |
1859 | return 0; | |
1860 | ||
4e85aff4 LP |
1861 | /* probably some kind of swap, ignore */ |
1862 | if (!is_path(where)) | |
b08d03ff LP |
1863 | return 0; |
1864 | ||
7410616c | 1865 | r = unit_name_from_path(where, ".mount", &e); |
03e52e8c | 1866 | if (r < 0) |
2c905207 | 1867 | return log_struct_errno( |
03e52e8c | 1868 | LOG_WARNING, r, |
2c905207 LP |
1869 | "MESSAGE_ID=" SD_MESSAGE_MOUNT_POINT_PATH_NOT_SUITABLE_STR, |
1870 | "MOUNT_POINT=%s", where, | |
03e52e8c YW |
1871 | LOG_MESSAGE("Failed to generate valid unit name from mount point path '%s', ignoring mount point: %m", |
1872 | where)); | |
b08d03ff | 1873 | |
7d17cfbc | 1874 | u = manager_get_unit(m, e); |
839ee058 | 1875 | if (u) |
03b8cfed | 1876 | r = mount_setup_existing_unit(u, what, where, options, fstype, &flags); |
839ee058 | 1877 | else |
09f4d843 ZJS |
1878 | /* First time we see this mount point meaning that it's not been initiated by a mount unit |
1879 | * but rather by the sysadmin having called mount(8) directly. */ | |
839ee058 | 1880 | r = mount_setup_new_unit(m, e, what, where, options, fstype, &flags, &u); |
03b8cfed | 1881 | if (r < 0) |
2c905207 | 1882 | return log_warning_errno(r, "Failed to set up mount unit for '%s': %m", where); |
ff5f34d0 | 1883 | |
ec88d1ea LP |
1884 | /* If the mount changed properties or state, let's notify our clients */ |
1885 | if (flags & (MOUNT_PROC_JUST_CHANGED|MOUNT_PROC_JUST_MOUNTED)) | |
ff5f34d0 | 1886 | unit_add_to_dbus_queue(u); |
c1e1601e | 1887 | |
ec88d1ea LP |
1888 | if (set_flags) |
1889 | MOUNT(u)->proc_flags = flags; | |
1890 | ||
b08d03ff | 1891 | return 0; |
b08d03ff LP |
1892 | } |
1893 | ||
ef734fd6 | 1894 | static int mount_load_proc_self_mountinfo(Manager *m, bool set_flags) { |
13dcfe46 ZJS |
1895 | _cleanup_(mnt_free_tablep) struct libmnt_table *table = NULL; |
1896 | _cleanup_(mnt_free_iterp) struct libmnt_iter *iter = NULL; | |
ba0d56f5 | 1897 | int r; |
b08d03ff LP |
1898 | |
1899 | assert(m); | |
1900 | ||
e2857b3d | 1901 | r = libmount_parse(NULL, NULL, &table, &iter); |
5cca8def | 1902 | if (r < 0) |
628c89cc | 1903 | return log_error_errno(r, "Failed to parse /proc/self/mountinfo: %m"); |
e537352b | 1904 | |
5cca8def | 1905 | for (;;) { |
95b862b0 | 1906 | struct libmnt_fs *fs; |
8d3ae2bd | 1907 | const char *device, *path, *options, *fstype; |
b08d03ff | 1908 | |
13dcfe46 ZJS |
1909 | r = mnt_table_next_fs(table, iter, &fs); |
1910 | if (r == 1) | |
5cca8def | 1911 | break; |
13dcfe46 ZJS |
1912 | if (r < 0) |
1913 | return log_error_errno(r, "Failed to get next entry from /proc/self/mountinfo: %m"); | |
5cca8def | 1914 | |
8d3ae2bd CL |
1915 | device = mnt_fs_get_source(fs); |
1916 | path = mnt_fs_get_target(fs); | |
1917 | options = mnt_fs_get_options(fs); | |
1918 | fstype = mnt_fs_get_fstype(fs); | |
a2e0f3d3 | 1919 | |
c0a7f8d3 DM |
1920 | if (!device || !path) |
1921 | continue; | |
1922 | ||
9d1b2b22 | 1923 | device_found_node(m, device, DEVICE_FOUND_MOUNT, DEVICE_FOUND_MOUNT); |
628c89cc | 1924 | |
9d1b2b22 | 1925 | (void) mount_setup_unit(m, device, path, options, fstype, set_flags); |
b08d03ff LP |
1926 | } |
1927 | ||
ba0d56f5 | 1928 | return 0; |
e537352b LP |
1929 | } |
1930 | ||
1931 | static void mount_shutdown(Manager *m) { | |
1932 | assert(m); | |
1933 | ||
5dcadb4c | 1934 | m->mount_event_source = sd_event_source_disable_unref(m->mount_event_source); |
718db961 | 1935 | |
d379d442 KZ |
1936 | mnt_unref_monitor(m->mount_monitor); |
1937 | m->mount_monitor = NULL; | |
b08d03ff LP |
1938 | } |
1939 | ||
7a7821c8 | 1940 | static int mount_get_timeout(Unit *u, usec_t *timeout) { |
68db7a3b | 1941 | Mount *m = MOUNT(u); |
7a7821c8 | 1942 | usec_t t; |
68db7a3b ZJS |
1943 | int r; |
1944 | ||
c73f413d FS |
1945 | assert(m); |
1946 | assert(u); | |
1947 | ||
68db7a3b ZJS |
1948 | if (!m->timer_event_source) |
1949 | return 0; | |
1950 | ||
7a7821c8 | 1951 | r = sd_event_source_get_time(m->timer_event_source, &t); |
68db7a3b ZJS |
1952 | if (r < 0) |
1953 | return r; | |
7a7821c8 LP |
1954 | if (t == USEC_INFINITY) |
1955 | return 0; | |
68db7a3b | 1956 | |
7a7821c8 | 1957 | *timeout = t; |
68db7a3b ZJS |
1958 | return 1; |
1959 | } | |
1960 | ||
04eb582a | 1961 | static void mount_enumerate_perpetual(Manager *m) { |
11222d0f LP |
1962 | Unit *u; |
1963 | int r; | |
1964 | ||
1965 | assert(m); | |
1966 | ||
1967 | /* Whatever happens, we know for sure that the root directory is around, and cannot go away. Let's | |
1968 | * unconditionally synthesize it here and mark it as perpetual. */ | |
1969 | ||
1970 | u = manager_get_unit(m, SPECIAL_ROOT_MOUNT); | |
1971 | if (!u) { | |
a581e45a | 1972 | r = unit_new_for_name(m, sizeof(Mount), SPECIAL_ROOT_MOUNT, &u); |
04eb582a LP |
1973 | if (r < 0) { |
1974 | log_error_errno(r, "Failed to allocate the special " SPECIAL_ROOT_MOUNT " unit: %m"); | |
1975 | return; | |
1976 | } | |
11222d0f LP |
1977 | } |
1978 | ||
1979 | u->perpetual = true; | |
1980 | MOUNT(u)->deserialized_state = MOUNT_MOUNTED; | |
1981 | ||
1982 | unit_add_to_load_queue(u); | |
1983 | unit_add_to_dbus_queue(u); | |
1984 | } | |
1985 | ||
1986 | static bool mount_is_mounted(Mount *m) { | |
1987 | assert(m); | |
1988 | ||
ec88d1ea | 1989 | return UNIT(m)->perpetual || FLAGS_SET(m->proc_flags, MOUNT_PROC_IS_MOUNTED); |
11222d0f LP |
1990 | } |
1991 | ||
edc027b4 | 1992 | static int mount_on_ratelimit_expire(sd_event_source *s, void *userdata) { |
99534007 | 1993 | Manager *m = ASSERT_PTR(userdata); |
c29e6a95 | 1994 | Job *j; |
edc027b4 | 1995 | |
c29e6a95 MS |
1996 | /* Let's enqueue all start jobs that were previously skipped because of active ratelimit. */ |
1997 | HASHMAP_FOREACH(j, m->jobs) { | |
1998 | if (j->unit->type != UNIT_MOUNT) | |
1999 | continue; | |
2000 | ||
2001 | job_add_to_run_queue(j); | |
2002 | } | |
2003 | ||
b0c4b282 LP |
2004 | /* By entering ratelimited state we made all mount start jobs not runnable, now rate limit is over so |
2005 | * let's make sure we dispatch them in the next iteration. */ | |
2006 | manager_trigger_run_queue(m); | |
edc027b4 MS |
2007 | |
2008 | return 0; | |
2009 | } | |
2010 | ||
ba64af90 | 2011 | static void mount_enumerate(Manager *m) { |
b08d03ff | 2012 | int r; |
d379d442 | 2013 | |
b08d03ff LP |
2014 | assert(m); |
2015 | ||
8d3ae2bd CL |
2016 | mnt_init_debug(0); |
2017 | ||
d379d442 | 2018 | if (!m->mount_monitor) { |
24a4542c | 2019 | unsigned mount_rate_limit_burst = 5; |
d379d442 | 2020 | int fd; |
ef734fd6 | 2021 | |
d379d442 KZ |
2022 | m->mount_monitor = mnt_new_monitor(); |
2023 | if (!m->mount_monitor) { | |
ba64af90 | 2024 | log_oom(); |
718db961 | 2025 | goto fail; |
d379d442 | 2026 | } |
29083707 | 2027 | |
d379d442 | 2028 | r = mnt_monitor_enable_kernel(m->mount_monitor, 1); |
ba64af90 LP |
2029 | if (r < 0) { |
2030 | log_error_errno(r, "Failed to enable watching of kernel mount events: %m"); | |
29083707 | 2031 | goto fail; |
ba64af90 LP |
2032 | } |
2033 | ||
d379d442 | 2034 | r = mnt_monitor_enable_userspace(m->mount_monitor, 1, NULL); |
ba64af90 LP |
2035 | if (r < 0) { |
2036 | log_error_errno(r, "Failed to enable watching of userspace mount events: %m"); | |
f7c1ad4f | 2037 | goto fail; |
ba64af90 | 2038 | } |
90598531 | 2039 | |
d379d442 KZ |
2040 | /* mnt_unref_monitor() will close the fd */ |
2041 | fd = r = mnt_monitor_get_fd(m->mount_monitor); | |
ba64af90 LP |
2042 | if (r < 0) { |
2043 | log_error_errno(r, "Failed to acquire watch file descriptor: %m"); | |
f7c1ad4f | 2044 | goto fail; |
ba64af90 | 2045 | } |
befb6d54 | 2046 | |
d379d442 | 2047 | r = sd_event_add_io(m->event, &m->mount_event_source, fd, EPOLLIN, mount_dispatch_io, m); |
ba64af90 LP |
2048 | if (r < 0) { |
2049 | log_error_errno(r, "Failed to watch mount file descriptor: %m"); | |
befb6d54 | 2050 | goto fail; |
ba64af90 | 2051 | } |
befb6d54 | 2052 | |
83231637 | 2053 | r = sd_event_source_set_priority(m->mount_event_source, SD_EVENT_PRIORITY_NORMAL-10); |
ba64af90 LP |
2054 | if (r < 0) { |
2055 | log_error_errno(r, "Failed to adjust mount watch priority: %m"); | |
befb6d54 | 2056 | goto fail; |
ba64af90 | 2057 | } |
7dfbe2e3 | 2058 | |
24a4542c LB |
2059 | /* Let users override the default (5 in 1s), as it stalls the boot sequence on busy systems. */ |
2060 | const char *e = secure_getenv("SYSTEMD_DEFAULT_MOUNT_RATE_LIMIT_BURST"); | |
2061 | if (e) { | |
2062 | r = safe_atou(e, &mount_rate_limit_burst); | |
2063 | if (r < 0) | |
2064 | log_debug("Invalid value in $SYSTEMD_DEFAULT_MOUNT_RATE_LIMIT_BURST, ignoring: %s", e); | |
2065 | } | |
2066 | ||
2067 | r = sd_event_source_set_ratelimit(m->mount_event_source, 1 * USEC_PER_SEC, mount_rate_limit_burst); | |
d586f642 MS |
2068 | if (r < 0) { |
2069 | log_error_errno(r, "Failed to enable rate limit for mount events: %m"); | |
2070 | goto fail; | |
2071 | } | |
2072 | ||
edc027b4 MS |
2073 | r = sd_event_source_set_ratelimit_expire_callback(m->mount_event_source, mount_on_ratelimit_expire); |
2074 | if (r < 0) { | |
2075 | log_error_errno(r, "Failed to enable rate limit for mount events: %m"); | |
2076 | goto fail; | |
2077 | } | |
2078 | ||
d379d442 | 2079 | (void) sd_event_source_set_description(m->mount_event_source, "mount-monitor-dispatch"); |
befb6d54 CL |
2080 | } |
2081 | ||
e62d8c39 ZJS |
2082 | r = mount_load_proc_self_mountinfo(m, false); |
2083 | if (r < 0) | |
b08d03ff LP |
2084 | goto fail; |
2085 | ||
ba64af90 | 2086 | return; |
b08d03ff LP |
2087 | |
2088 | fail: | |
2089 | mount_shutdown(m); | |
5cb5a6ff LP |
2090 | } |
2091 | ||
fcd8e119 LP |
2092 | static int drain_libmount(Manager *m) { |
2093 | bool rescan = false; | |
2094 | int r; | |
2095 | ||
2096 | assert(m); | |
2097 | ||
2098 | /* Drain all events and verify that the event is valid. | |
2099 | * | |
2100 | * Note that libmount also monitors /run/mount mkdir if the directory does not exist yet. The mkdir | |
2101 | * may generate event which is irrelevant for us. | |
2102 | * | |
2103 | * error: r < 0; valid: r == 0, false positive: r == 1 */ | |
2104 | do { | |
2105 | r = mnt_monitor_next_change(m->mount_monitor, NULL, NULL); | |
2106 | if (r < 0) | |
2107 | return log_error_errno(r, "Failed to drain libmount events: %m"); | |
2108 | if (r == 0) | |
2109 | rescan = true; | |
2110 | } while (r == 0); | |
2111 | ||
2112 | return rescan; | |
2113 | } | |
2114 | ||
35080486 | 2115 | static int mount_process_proc_self_mountinfo(Manager *m) { |
6688b72d | 2116 | _cleanup_set_free_ Set *around = NULL, *gone = NULL; |
ec8126d7 | 2117 | const char *what; |
ef734fd6 LP |
2118 | int r; |
2119 | ||
2120 | assert(m); | |
ef734fd6 | 2121 | |
fcd8e119 LP |
2122 | r = drain_libmount(m); |
2123 | if (r <= 0) | |
2124 | return r; | |
ef734fd6 | 2125 | |
4f0eedb7 ZJS |
2126 | r = mount_load_proc_self_mountinfo(m, true); |
2127 | if (r < 0) { | |
e537352b | 2128 | /* Reset flags, just in case, for later calls */ |
ec88d1ea LP |
2129 | LIST_FOREACH(units_by_type, u, m->units_by_type[UNIT_MOUNT]) |
2130 | MOUNT(u)->proc_flags = 0; | |
e537352b | 2131 | |
ec8126d7 | 2132 | return 0; |
ef734fd6 LP |
2133 | } |
2134 | ||
2135 | manager_dispatch_load_queue(m); | |
2136 | ||
595ed347 MS |
2137 | LIST_FOREACH(units_by_type, u, m->units_by_type[UNIT_MOUNT]) { |
2138 | Mount *mount = MOUNT(u); | |
ef734fd6 | 2139 | |
1e122561 YW |
2140 | mount->invalidated_state = false; |
2141 | ||
11222d0f | 2142 | if (!mount_is_mounted(mount)) { |
e537352b | 2143 | |
1483892a | 2144 | /* A mount point is not around right now. It might be gone, or might never have |
394763f6 LP |
2145 | * existed. */ |
2146 | ||
2147 | if (mount->from_proc_self_mountinfo && | |
6688b72d | 2148 | mount->parameters_proc_self_mountinfo.what) |
394763f6 | 2149 | /* Remember that this device might just have disappeared */ |
6688b72d | 2150 | if (set_put_strdup_full(&gone, &path_hash_ops_free, mount->parameters_proc_self_mountinfo.what) < 0) |
394763f6 | 2151 | log_oom(); /* we don't care too much about OOM here... */ |
fcd8b266 | 2152 | |
ef734fd6 | 2153 | mount->from_proc_self_mountinfo = false; |
9ddaa3e4 | 2154 | assert_se(update_parameters_proc_self_mountinfo(mount, NULL, NULL, NULL) >= 0); |
e537352b LP |
2155 | |
2156 | switch (mount->state) { | |
2157 | ||
2158 | case MOUNT_MOUNTED: | |
7eba1463 | 2159 | /* This has just been unmounted by somebody else, follow the state change. */ |
9d2f5178 | 2160 | mount_enter_dead(mount, MOUNT_SUCCESS); |
e537352b LP |
2161 | break; |
2162 | ||
2fa0bd7d YW |
2163 | case MOUNT_MOUNTING_DONE: |
2164 | /* The mount command may add the corresponding proc mountinfo entry and | |
2165 | * then remove it because of an internal error. E.g., fuse.sshfs seems | |
2166 | * to do that when the connection fails. See #17617. To handle such the | |
2167 | * case, let's once set the state back to mounting. Then, the unit can | |
2168 | * correctly enter the failed state later in mount_sigchld(). */ | |
2169 | mount_set_state(mount, MOUNT_MOUNTING); | |
2170 | break; | |
2171 | ||
e537352b | 2172 | default: |
e537352b | 2173 | break; |
e537352b LP |
2174 | } |
2175 | ||
ec88d1ea | 2176 | } else if (mount->proc_flags & (MOUNT_PROC_JUST_MOUNTED|MOUNT_PROC_JUST_CHANGED)) { |
e537352b | 2177 | |
fcd8b266 | 2178 | /* A mount point was added or changed */ |
e537352b LP |
2179 | |
2180 | switch (mount->state) { | |
2181 | ||
2182 | case MOUNT_DEAD: | |
fdf20a31 | 2183 | case MOUNT_FAILED: |
4b58153d LP |
2184 | |
2185 | /* This has just been mounted by somebody else, follow the state change, but let's | |
2186 | * generate a new invocation ID for this implicitly and automatically. */ | |
7eba1463 LP |
2187 | (void) unit_acquire_invocation_id(u); |
2188 | mount_cycle_clear(mount); | |
9d2f5178 | 2189 | mount_enter_mounted(mount, MOUNT_SUCCESS); |
e537352b LP |
2190 | break; |
2191 | ||
2192 | case MOUNT_MOUNTING: | |
5bcb0f2b | 2193 | mount_set_state(mount, MOUNT_MOUNTING_DONE); |
e537352b LP |
2194 | break; |
2195 | ||
2196 | default: | |
1483892a LP |
2197 | /* Nothing really changed, but let's issue an notification call nonetheless, |
2198 | * in case somebody is waiting for this. (e.g. file system ro/rw | |
2199 | * remounts.) */ | |
e537352b LP |
2200 | mount_set_state(mount, mount->state); |
2201 | break; | |
2202 | } | |
394763f6 | 2203 | } |
fcd8b266 | 2204 | |
11222d0f | 2205 | if (mount_is_mounted(mount) && |
394763f6 | 2206 | mount->from_proc_self_mountinfo && |
6688b72d | 2207 | mount->parameters_proc_self_mountinfo.what) |
b6418dc9 | 2208 | /* Track devices currently used */ |
6688b72d | 2209 | if (set_put_strdup_full(&around, &path_hash_ops_free, mount->parameters_proc_self_mountinfo.what) < 0) |
394763f6 | 2210 | log_oom(); |
e537352b LP |
2211 | |
2212 | /* Reset the flags for later calls */ | |
ec88d1ea | 2213 | mount->proc_flags = 0; |
e537352b | 2214 | } |
718db961 | 2215 | |
90e74a66 | 2216 | SET_FOREACH(what, gone) { |
fcd8b266 LP |
2217 | if (set_contains(around, what)) |
2218 | continue; | |
2219 | ||
2220 | /* Let the device units know that the device is no longer mounted */ | |
b1ba0ce8 | 2221 | device_found_node(m, what, DEVICE_NOT_FOUND, DEVICE_FOUND_MOUNT); |
fcd8b266 | 2222 | } |
ec8126d7 ZJS |
2223 | |
2224 | return 0; | |
e537352b LP |
2225 | } |
2226 | ||
35080486 | 2227 | static int mount_dispatch_io(sd_event_source *source, int fd, uint32_t revents, void *userdata) { |
99534007 | 2228 | Manager *m = ASSERT_PTR(userdata); |
35080486 | 2229 | |
35080486 LP |
2230 | assert(revents & EPOLLIN); |
2231 | ||
2232 | return mount_process_proc_self_mountinfo(m); | |
2233 | } | |
2234 | ||
1e122561 YW |
2235 | int mount_invalidate_state_by_path(Manager *manager, const char *path) { |
2236 | _cleanup_free_ char *name = NULL; | |
2237 | Unit *u; | |
2238 | int r; | |
2239 | ||
2240 | assert(manager); | |
2241 | assert(path); | |
2242 | ||
2243 | r = unit_name_from_path(path, ".mount", &name); | |
2244 | if (r < 0) | |
2245 | return log_debug_errno(r, "Failed to generate unit name from path \"%s\", ignoring: %m", path); | |
2246 | ||
2247 | u = manager_get_unit(manager, name); | |
2248 | if (!u) | |
2249 | return -ENOENT; | |
2250 | ||
2251 | MOUNT(u)->invalidated_state = true; | |
2252 | return 0; | |
2253 | } | |
2254 | ||
fdf20a31 | 2255 | static void mount_reset_failed(Unit *u) { |
5632e374 LP |
2256 | Mount *m = MOUNT(u); |
2257 | ||
2258 | assert(m); | |
2259 | ||
fdf20a31 | 2260 | if (m->state == MOUNT_FAILED) |
5632e374 LP |
2261 | mount_set_state(m, MOUNT_DEAD); |
2262 | ||
9d2f5178 LP |
2263 | m->result = MOUNT_SUCCESS; |
2264 | m->reload_result = MOUNT_SUCCESS; | |
17e9d53d | 2265 | m->clean_result = MOUNT_SUCCESS; |
5632e374 LP |
2266 | } |
2267 | ||
37eb258e LP |
2268 | static PidRef* mount_control_pid(Unit *u) { |
2269 | return &ASSERT_PTR(MOUNT(u))->control_pid; | |
291d565a LP |
2270 | } |
2271 | ||
17e9d53d YW |
2272 | static int mount_clean(Unit *u, ExecCleanMask mask) { |
2273 | _cleanup_strv_free_ char **l = NULL; | |
2274 | Mount *m = MOUNT(u); | |
2275 | int r; | |
2276 | ||
2277 | assert(m); | |
2278 | assert(mask != 0); | |
2279 | ||
2280 | if (m->state != MOUNT_DEAD) | |
2281 | return -EBUSY; | |
2282 | ||
2283 | r = exec_context_get_clean_directories(&m->exec_context, u->manager->prefix, mask, &l); | |
2284 | if (r < 0) | |
2285 | return r; | |
2286 | ||
2287 | if (strv_isempty(l)) | |
2288 | return -EUNATCH; | |
2289 | ||
2290 | mount_unwatch_control_pid(m); | |
2291 | m->clean_result = MOUNT_SUCCESS; | |
2292 | m->control_command = NULL; | |
2293 | m->control_command_id = _MOUNT_EXEC_COMMAND_INVALID; | |
2294 | ||
e9276800 | 2295 | r = mount_arm_timer(m, /* relative= */ true, m->exec_context.timeout_clean_usec); |
d30eb0b5 LP |
2296 | if (r < 0) { |
2297 | log_unit_warning_errno(u, r, "Failed to install timer: %m"); | |
17e9d53d | 2298 | goto fail; |
d30eb0b5 | 2299 | } |
17e9d53d | 2300 | |
4775b55d | 2301 | r = unit_fork_and_watch_rm_rf(u, l, &m->control_pid); |
d30eb0b5 LP |
2302 | if (r < 0) { |
2303 | log_unit_warning_errno(u, r, "Failed to spawn cleaning task: %m"); | |
360f384f | 2304 | goto fail; |
d30eb0b5 | 2305 | } |
17e9d53d | 2306 | |
360f384f | 2307 | mount_set_state(m, MOUNT_CLEANING); |
17e9d53d YW |
2308 | return 0; |
2309 | ||
2310 | fail: | |
17e9d53d | 2311 | m->clean_result = MOUNT_FAILURE_RESOURCES; |
5dcadb4c | 2312 | m->timer_event_source = sd_event_source_disable_unref(m->timer_event_source); |
17e9d53d YW |
2313 | return r; |
2314 | } | |
2315 | ||
2316 | static int mount_can_clean(Unit *u, ExecCleanMask *ret) { | |
2317 | Mount *m = MOUNT(u); | |
2318 | ||
2319 | assert(m); | |
2320 | ||
2321 | return exec_context_get_clean_mask(&m->exec_context, ret); | |
2322 | } | |
2323 | ||
705578c3 | 2324 | static int mount_can_start(Unit *u) { |
9727f242 DDM |
2325 | Mount *m = MOUNT(u); |
2326 | int r; | |
2327 | ||
2328 | assert(m); | |
2329 | ||
2330 | r = unit_test_start_limit(u); | |
2331 | if (r < 0) { | |
2332 | mount_enter_dead(m, MOUNT_FAILURE_START_LIMIT_HIT); | |
2333 | return r; | |
2334 | } | |
2335 | ||
705578c3 | 2336 | return 1; |
9727f242 DDM |
2337 | } |
2338 | ||
47261967 LP |
2339 | static int mount_subsystem_ratelimited(Manager *m) { |
2340 | assert(m); | |
2341 | ||
2342 | if (!m->mount_event_source) | |
2343 | return false; | |
2344 | ||
2345 | return sd_event_source_is_ratelimited(m->mount_event_source); | |
2346 | } | |
2347 | ||
a16e1123 | 2348 | static const char* const mount_exec_command_table[_MOUNT_EXEC_COMMAND_MAX] = { |
48d83e33 | 2349 | [MOUNT_EXEC_MOUNT] = "ExecMount", |
a16e1123 LP |
2350 | [MOUNT_EXEC_UNMOUNT] = "ExecUnmount", |
2351 | [MOUNT_EXEC_REMOUNT] = "ExecRemount", | |
2352 | }; | |
2353 | ||
2354 | DEFINE_STRING_TABLE_LOOKUP(mount_exec_command, MountExecCommand); | |
2355 | ||
9d2f5178 | 2356 | static const char* const mount_result_table[_MOUNT_RESULT_MAX] = { |
48d83e33 ZJS |
2357 | [MOUNT_SUCCESS] = "success", |
2358 | [MOUNT_FAILURE_RESOURCES] = "resources", | |
2359 | [MOUNT_FAILURE_TIMEOUT] = "timeout", | |
2360 | [MOUNT_FAILURE_EXIT_CODE] = "exit-code", | |
2361 | [MOUNT_FAILURE_SIGNAL] = "signal", | |
2362 | [MOUNT_FAILURE_CORE_DUMP] = "core-dump", | |
07299350 | 2363 | [MOUNT_FAILURE_START_LIMIT_HIT] = "start-limit-hit", |
48d83e33 | 2364 | [MOUNT_FAILURE_PROTOCOL] = "protocol", |
9d2f5178 LP |
2365 | }; |
2366 | ||
2367 | DEFINE_STRING_TABLE_LOOKUP(mount_result, MountResult); | |
2368 | ||
87f0e418 | 2369 | const UnitVTable mount_vtable = { |
7d17cfbc | 2370 | .object_size = sizeof(Mount), |
718db961 LP |
2371 | .exec_context_offset = offsetof(Mount, exec_context), |
2372 | .cgroup_context_offset = offsetof(Mount, cgroup_context), | |
2373 | .kill_context_offset = offsetof(Mount, kill_context), | |
613b411c | 2374 | .exec_runtime_offset = offsetof(Mount, exec_runtime), |
3ef63c31 | 2375 | |
f975e971 LP |
2376 | .sections = |
2377 | "Unit\0" | |
2378 | "Mount\0" | |
2379 | "Install\0", | |
4ad49000 | 2380 | .private_section = "Mount", |
71645aca | 2381 | |
c80a9a33 LP |
2382 | .can_transient = true, |
2383 | .can_fail = true, | |
755021d4 | 2384 | .exclude_from_switch_root_serialization = true, |
c80a9a33 | 2385 | |
e537352b LP |
2386 | .init = mount_init, |
2387 | .load = mount_load, | |
034c6ed7 | 2388 | .done = mount_done, |
e537352b | 2389 | |
f50e0a01 | 2390 | .coldplug = mount_coldplug, |
01400460 | 2391 | .catchup = mount_catchup, |
f50e0a01 | 2392 | |
034c6ed7 | 2393 | .dump = mount_dump, |
5cb5a6ff | 2394 | |
e537352b LP |
2395 | .start = mount_start, |
2396 | .stop = mount_stop, | |
2397 | .reload = mount_reload, | |
2398 | ||
17e9d53d YW |
2399 | .clean = mount_clean, |
2400 | .can_clean = mount_can_clean, | |
8a0867d6 | 2401 | |
a16e1123 LP |
2402 | .serialize = mount_serialize, |
2403 | .deserialize_item = mount_deserialize_item, | |
2404 | ||
f50e0a01 | 2405 | .active_state = mount_active_state, |
10a94420 | 2406 | .sub_state_to_string = mount_sub_state_to_string, |
b08d03ff | 2407 | |
52a12341 YW |
2408 | .will_restart = unit_will_restart_default, |
2409 | ||
f2f725e5 | 2410 | .may_gc = mount_may_gc, |
39c79477 | 2411 | .is_extrinsic = mount_is_extrinsic, |
701cc384 | 2412 | |
e537352b | 2413 | .sigchld_event = mount_sigchld_event, |
e537352b | 2414 | |
fdf20a31 | 2415 | .reset_failed = mount_reset_failed, |
291d565a LP |
2416 | |
2417 | .control_pid = mount_control_pid, | |
5632e374 | 2418 | |
74c964d3 LP |
2419 | .bus_set_property = bus_mount_set_property, |
2420 | .bus_commit_properties = bus_mount_commit_properties, | |
4139c1b2 | 2421 | |
68db7a3b ZJS |
2422 | .get_timeout = mount_get_timeout, |
2423 | ||
04eb582a | 2424 | .enumerate_perpetual = mount_enumerate_perpetual, |
f50e0a01 | 2425 | .enumerate = mount_enumerate, |
c6918296 | 2426 | .shutdown = mount_shutdown, |
47261967 | 2427 | .subsystem_ratelimited = mount_subsystem_ratelimited, |
c6918296 MS |
2428 | |
2429 | .status_message_formats = { | |
2430 | .starting_stopping = { | |
2431 | [0] = "Mounting %s...", | |
2432 | [1] = "Unmounting %s...", | |
2433 | }, | |
2434 | .finished_start_job = { | |
2435 | [JOB_DONE] = "Mounted %s.", | |
2436 | [JOB_FAILED] = "Failed to mount %s.", | |
c6918296 MS |
2437 | [JOB_TIMEOUT] = "Timed out mounting %s.", |
2438 | }, | |
2439 | .finished_stop_job = { | |
2440 | [JOB_DONE] = "Unmounted %s.", | |
2441 | [JOB_FAILED] = "Failed unmounting %s.", | |
2442 | [JOB_TIMEOUT] = "Timed out unmounting %s.", | |
2443 | }, | |
2444 | }, | |
9727f242 | 2445 | |
705578c3 | 2446 | .can_start = mount_can_start, |
b2bfd121 LP |
2447 | |
2448 | .notify_plymouth = true, | |
5cb5a6ff | 2449 | }; |