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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" | |
8dbab37d | 37 | #include "utf8.h" |
5cb5a6ff | 38 | |
7d54a03a LP |
39 | #define RETRY_UMOUNT_MAX 32 |
40 | ||
f50e0a01 | 41 | static const UnitActiveState state_translation_table[_MOUNT_STATE_MAX] = { |
17f6b640 YW |
42 | [MOUNT_DEAD] = UNIT_INACTIVE, |
43 | [MOUNT_MOUNTING] = UNIT_ACTIVATING, | |
44 | [MOUNT_MOUNTING_DONE] = UNIT_ACTIVATING, | |
45 | [MOUNT_MOUNTED] = UNIT_ACTIVE, | |
46 | [MOUNT_REMOUNTING] = UNIT_RELOADING, | |
47 | [MOUNT_UNMOUNTING] = UNIT_DEACTIVATING, | |
032ff4af LP |
48 | [MOUNT_REMOUNTING_SIGTERM] = UNIT_RELOADING, |
49 | [MOUNT_REMOUNTING_SIGKILL] = UNIT_RELOADING, | |
e537352b LP |
50 | [MOUNT_UNMOUNTING_SIGTERM] = UNIT_DEACTIVATING, |
51 | [MOUNT_UNMOUNTING_SIGKILL] = UNIT_DEACTIVATING, | |
17f6b640 YW |
52 | [MOUNT_FAILED] = UNIT_FAILED, |
53 | [MOUNT_CLEANING] = UNIT_MAINTENANCE, | |
f50e0a01 | 54 | }; |
5cb5a6ff | 55 | |
718db961 LP |
56 | static int mount_dispatch_timer(sd_event_source *source, usec_t usec, void *userdata); |
57 | static int mount_dispatch_io(sd_event_source *source, int fd, uint32_t revents, void *userdata); | |
e3783068 | 58 | static void mount_enter_dead(Mount *m, MountResult f, bool flush_result); |
01400460 YW |
59 | static void mount_enter_mounted(Mount *m, MountResult f); |
60 | static void mount_cycle_clear(Mount *m); | |
35080486 | 61 | static int mount_process_proc_self_mountinfo(Manager *m); |
718db961 | 62 | |
c634f3d2 LP |
63 | static bool MOUNT_STATE_WITH_PROCESS(MountState state) { |
64 | return IN_SET(state, | |
65 | MOUNT_MOUNTING, | |
66 | MOUNT_MOUNTING_DONE, | |
67 | MOUNT_REMOUNTING, | |
68 | MOUNT_REMOUNTING_SIGTERM, | |
69 | MOUNT_REMOUNTING_SIGKILL, | |
70 | MOUNT_UNMOUNTING, | |
71 | MOUNT_UNMOUNTING_SIGTERM, | |
17e9d53d YW |
72 | MOUNT_UNMOUNTING_SIGKILL, |
73 | MOUNT_CLEANING); | |
c634f3d2 LP |
74 | } |
75 | ||
47cd17ea LP |
76 | static MountParameters* get_mount_parameters_fragment(Mount *m) { |
77 | assert(m); | |
78 | ||
79 | if (m->from_fragment) | |
80 | return &m->parameters_fragment; | |
81 | ||
82 | return NULL; | |
83 | } | |
84 | ||
85 | static MountParameters* get_mount_parameters(Mount *m) { | |
86 | assert(m); | |
87 | ||
88 | if (m->from_proc_self_mountinfo) | |
89 | return &m->parameters_proc_self_mountinfo; | |
90 | ||
91 | return get_mount_parameters_fragment(m); | |
92 | } | |
93 | ||
7121cbcf LP |
94 | static bool mount_is_network(const MountParameters *p) { |
95 | assert(p); | |
96 | ||
97 | if (fstab_test_option(p->options, "_netdev\0")) | |
fc676b00 ZJS |
98 | return true; |
99 | ||
7121cbcf | 100 | if (p->fstype && fstype_is_network(p->fstype)) |
fc676b00 ZJS |
101 | return true; |
102 | ||
103 | return false; | |
104 | } | |
105 | ||
5a7c4f4f FB |
106 | static bool mount_is_nofail(const Mount *m) { |
107 | assert(m); | |
108 | ||
109 | if (!m->from_fragment) | |
110 | return false; | |
111 | ||
112 | return fstab_test_yes_no_option(m->parameters_fragment.options, "nofail\0" "fail\0"); | |
113 | } | |
114 | ||
d3bd0986 MK |
115 | static bool mount_is_loop(const MountParameters *p) { |
116 | assert(p); | |
117 | ||
118 | if (fstab_test_option(p->options, "loop\0")) | |
119 | return true; | |
120 | ||
121 | return false; | |
122 | } | |
123 | ||
e6a7b9f4 | 124 | static bool mount_is_bind(const MountParameters *p) { |
fc676b00 | 125 | assert(p); |
35df78cd | 126 | return fstab_is_bind(p->options, p->fstype); |
fc676b00 ZJS |
127 | } |
128 | ||
707ecf14 MY |
129 | static int mount_is_bound_to_device(Mount *m) { |
130 | _cleanup_free_ char *value = NULL; | |
ebc8968b | 131 | const MountParameters *p; |
707ecf14 | 132 | int r; |
ebc8968b | 133 | |
47cd17ea LP |
134 | assert(m); |
135 | ||
136 | /* Determines whether to place a Requires= or BindsTo= dependency on the backing device unit. We do | |
707ecf14 | 137 | * this by checking for the x-systemd.device-bound= mount option. If it is enabled we use BindsTo=, |
47cd17ea LP |
138 | * otherwise Requires=. But note that we might combine the latter with StopPropagatedFrom=, see |
139 | * below. */ | |
140 | ||
141 | p = get_mount_parameters(m); | |
142 | if (!p) | |
143 | return false; | |
ebc8968b | 144 | |
707ecf14 MY |
145 | r = fstab_filter_options(p->options, "x-systemd.device-bound\0", NULL, &value, NULL, NULL); |
146 | if (r < 0) | |
147 | return r; | |
148 | if (r == 0) | |
149 | return -EIDRM; /* If unspecified at all, return recognizable error */ | |
150 | ||
151 | if (isempty(value)) | |
152 | return true; | |
153 | ||
154 | return parse_boolean(value); | |
ebc8968b FB |
155 | } |
156 | ||
47cd17ea | 157 | static bool mount_propagate_stop(Mount *m) { |
707ecf14 MY |
158 | int r; |
159 | ||
47cd17ea LP |
160 | assert(m); |
161 | ||
707ecf14 MY |
162 | r = mount_is_bound_to_device(m); |
163 | if (r >= 0) | |
164 | /* If x-systemd.device-bound=no is explicitly requested by user, don't try to set StopPropagatedFrom=. | |
165 | * Also don't bother if true, since with BindsTo= the stop propagation is implicit. */ | |
47cd17ea | 166 | return false; |
707ecf14 MY |
167 | if (r != -EIDRM) |
168 | log_debug_errno(r, "Failed to get x-systemd.device-bound= option, ignoring: %m"); | |
47cd17ea LP |
169 | |
170 | return m->from_fragment; /* let's propagate stop whenever this is an explicitly configured unit, | |
171 | * otherwise let's not bother. */ | |
172 | } | |
173 | ||
a16e1123 | 174 | static void mount_init(Unit *u) { |
e9fa1bf7 | 175 | Mount *m = ASSERT_PTR(MOUNT(u)); |
5cb5a6ff | 176 | |
ac155bb8 | 177 | assert(u->load_state == UNIT_STUB); |
a16e1123 | 178 | |
c9e120e0 | 179 | m->timeout_usec = u->manager->defaults.timeout_start_usec; |
5804e1b6 | 180 | |
c9e120e0 LP |
181 | m->exec_context.std_output = u->manager->defaults.std_output; |
182 | m->exec_context.std_error = u->manager->defaults.std_error; | |
5804e1b6 | 183 | |
3e5235b0 LP |
184 | m->directory_mode = 0755; |
185 | ||
f00929ad DJL |
186 | /* We need to make sure that /usr/bin/mount is always called |
187 | * in the same process group as us, so that the autofs kernel | |
a16e1123 LP |
188 | * side doesn't send us another mount request while we are |
189 | * already trying to comply its last one. */ | |
74922904 | 190 | m->exec_context.same_pgrp = true; |
8d567588 | 191 | |
360f384f | 192 | m->control_pid = PIDREF_NULL; |
a16e1123 | 193 | m->control_command_id = _MOUNT_EXEC_COMMAND_INVALID; |
c8f4d764 | 194 | |
5bcb0f2b | 195 | u->ignore_on_isolate = true; |
8d567588 LP |
196 | } |
197 | ||
e9276800 | 198 | static int mount_arm_timer(Mount *m, bool relative, usec_t usec) { |
718db961 LP |
199 | assert(m); |
200 | ||
e9276800 | 201 | return unit_arm_timer(UNIT(m), &m->timer_event_source, relative, usec, mount_dispatch_timer); |
718db961 LP |
202 | } |
203 | ||
a16e1123 | 204 | static void mount_unwatch_control_pid(Mount *m) { |
5e94833f | 205 | assert(m); |
ea1e0bf1 | 206 | unit_unwatch_pidref_done(UNIT(m), &m->control_pid); |
5e94833f LP |
207 | } |
208 | ||
e537352b LP |
209 | static void mount_parameters_done(MountParameters *p) { |
210 | assert(p); | |
211 | ||
a26592cf LP |
212 | p->what = mfree(p->what); |
213 | p->options = mfree(p->options); | |
214 | p->fstype = mfree(p->fstype); | |
e537352b LP |
215 | } |
216 | ||
87f0e418 | 217 | static void mount_done(Unit *u) { |
e9fa1bf7 | 218 | Mount *m = ASSERT_PTR(MOUNT(u)); |
034c6ed7 | 219 | |
a1e58e8e | 220 | m->where = mfree(m->where); |
f50e0a01 | 221 | |
e537352b LP |
222 | mount_parameters_done(&m->parameters_proc_self_mountinfo); |
223 | mount_parameters_done(&m->parameters_fragment); | |
ef734fd6 | 224 | |
28135da3 | 225 | m->exec_runtime = exec_runtime_free(m->exec_runtime); |
9cc54544 | 226 | |
e537352b LP |
227 | exec_command_done_array(m->exec_command, _MOUNT_EXEC_COMMAND_MAX); |
228 | m->control_command = NULL; | |
f50e0a01 | 229 | |
a16e1123 | 230 | mount_unwatch_control_pid(m); |
f50e0a01 | 231 | |
5dcadb4c | 232 | m->timer_event_source = sd_event_source_disable_unref(m->timer_event_source); |
f50e0a01 LP |
233 | } |
234 | ||
9ddaa3e4 | 235 | static int update_parameters_proc_self_mountinfo( |
b7bbf890 ZJS |
236 | Mount *m, |
237 | const char *what, | |
238 | const char *options, | |
239 | const char *fstype) { | |
240 | ||
241 | MountParameters *p; | |
242 | int r, q, w; | |
243 | ||
e9fa1bf7 MY |
244 | assert(m); |
245 | ||
b7bbf890 ZJS |
246 | p = &m->parameters_proc_self_mountinfo; |
247 | ||
bcf58ff5 YW |
248 | r = free_and_strdup(&p->what, what); |
249 | if (r < 0) | |
250 | return r; | |
aaf7b0e4 | 251 | |
bcf58ff5 YW |
252 | q = free_and_strdup(&p->options, options); |
253 | if (q < 0) | |
254 | return q; | |
b7bbf890 ZJS |
255 | |
256 | w = free_and_strdup(&p->fstype, fstype); | |
257 | if (w < 0) | |
258 | return w; | |
259 | ||
260 | return r > 0 || q > 0 || w > 0; | |
261 | } | |
262 | ||
eef85c4a | 263 | static int mount_add_mount_dependencies(Mount *m) { |
5c78d8e2 | 264 | MountParameters *pm; |
b08d03ff LP |
265 | int r; |
266 | ||
6e2ef85b | 267 | assert(m); |
b08d03ff | 268 | |
a57f7e2c | 269 | if (!path_equal(m->where, "/")) { |
eef85c4a LP |
270 | _cleanup_free_ char *parent = NULL; |
271 | ||
272 | /* Adds in links to other mount points that might lie further up in the hierarchy */ | |
5f311f8c | 273 | |
45519d13 LP |
274 | r = path_extract_directory(m->where, &parent); |
275 | if (r < 0) | |
276 | return r; | |
01f78473 | 277 | |
9e615fa3 | 278 | r = unit_add_mounts_for(UNIT(m), parent, UNIT_DEPENDENCY_IMPLICIT, UNIT_MOUNT_REQUIRES); |
4f0eedb7 | 279 | if (r < 0) |
01f78473 | 280 | return r; |
4f0eedb7 | 281 | } |
01f78473 | 282 | |
eef85c4a LP |
283 | /* Adds in dependencies to other mount points that might be needed for the source path (if this is a bind mount |
284 | * or a loop mount) to be available. */ | |
a57f7e2c | 285 | pm = get_mount_parameters_fragment(m); |
fc676b00 ZJS |
286 | if (pm && pm->what && |
287 | path_is_absolute(pm->what) && | |
d3bd0986 | 288 | (mount_is_bind(pm) || mount_is_loop(pm) || !mount_is_network(pm))) { |
fc676b00 | 289 | |
9e615fa3 | 290 | r = unit_add_mounts_for(UNIT(m), pm->what, UNIT_DEPENDENCY_FILE, UNIT_MOUNT_REQUIRES); |
4f0eedb7 | 291 | if (r < 0) |
6e2ef85b | 292 | return r; |
4f0eedb7 | 293 | } |
b08d03ff | 294 | |
eef85c4a | 295 | /* Adds in dependencies to other units that use this path or paths further down in the hierarchy */ |
9e615fa3 LB |
296 | for (UnitMountDependencyType t = 0; t < _UNIT_MOUNT_DEPENDENCY_TYPE_MAX; ++t) { |
297 | Unit *other; | |
298 | Set *s = manager_get_units_needing_mounts_for(UNIT(m)->manager, m->where, t); | |
299 | ||
300 | SET_FOREACH(other, s) { | |
301 | if (other->load_state != UNIT_LOADED) | |
302 | continue; | |
303 | ||
304 | if (other == UNIT(m)) | |
305 | continue; | |
306 | ||
307 | r = unit_add_dependency( | |
308 | other, | |
309 | UNIT_AFTER, | |
310 | UNIT(m), | |
311 | /* add_reference= */ true, | |
312 | UNIT_DEPENDENCY_PATH); | |
a57f7e2c LP |
313 | if (r < 0) |
314 | return r; | |
9e615fa3 LB |
315 | |
316 | if (UNIT(m)->fragment_path) { | |
317 | /* If we have fragment configuration, then make this dependency required/wanted */ | |
318 | r = unit_add_dependency( | |
319 | other, | |
320 | unit_mount_dependency_type_to_dependency_type(t), | |
321 | UNIT(m), | |
322 | /* add_reference= */ true, | |
323 | UNIT_DEPENDENCY_PATH); | |
324 | if (r < 0) | |
325 | return r; | |
326 | } | |
a57f7e2c | 327 | } |
7c8fa05c LP |
328 | } |
329 | ||
330 | return 0; | |
331 | } | |
332 | ||
eef85c4a | 333 | static int mount_add_device_dependencies(Mount *m) { |
87c734ee | 334 | UnitDependencyMask mask; |
eef85c4a | 335 | MountParameters *p; |
ebc8968b | 336 | UnitDependency dep; |
9fff8a1f | 337 | int r; |
173a8d04 LP |
338 | |
339 | assert(m); | |
340 | ||
556b6f4e DDM |
341 | log_unit_trace(UNIT(m), "Processing implicit device dependencies"); |
342 | ||
06e97888 | 343 | p = get_mount_parameters(m); |
556b6f4e DDM |
344 | if (!p) { |
345 | log_unit_trace(UNIT(m), "Missing mount parameters, skipping implicit device dependencies"); | |
173a8d04 | 346 | return 0; |
556b6f4e | 347 | } |
173a8d04 | 348 | |
556b6f4e DDM |
349 | if (!p->what) { |
350 | log_unit_trace(UNIT(m), "Missing mount source, skipping implicit device dependencies"); | |
173a8d04 | 351 | return 0; |
556b6f4e | 352 | } |
5c78d8e2 | 353 | |
556b6f4e DDM |
354 | if (mount_is_bind(p)) { |
355 | log_unit_trace(UNIT(m), "Mount unit is a bind mount, skipping implicit device dependencies"); | |
dd144c63 | 356 | return 0; |
556b6f4e | 357 | } |
dd144c63 | 358 | |
556b6f4e DDM |
359 | if (!is_device_path(p->what)) { |
360 | log_unit_trace(UNIT(m), "Mount source is not a device path, skipping implicit device dependencies"); | |
dd144c63 | 361 | return 0; |
556b6f4e | 362 | } |
dd144c63 | 363 | |
5de0acf4 LP |
364 | /* /dev/root is a really weird thing, it's not a real device, but just a path the kernel exports for |
365 | * the root file system specified on the kernel command line. Ignore it here. */ | |
556b6f4e DDM |
366 | if (PATH_IN_SET(p->what, "/dev/root", "/dev/nfs")) { |
367 | log_unit_trace(UNIT(m), "Mount source is in /dev/root or /dev/nfs, skipping implicit device dependencies"); | |
7ba2711d | 368 | return 0; |
556b6f4e | 369 | } |
7ba2711d | 370 | |
556b6f4e DDM |
371 | if (path_equal(m->where, "/")) { |
372 | log_unit_trace(UNIT(m), "Mount destination is '/', skipping implicit device dependencies"); | |
dd144c63 | 373 | return 0; |
556b6f4e | 374 | } |
dd144c63 | 375 | |
44b0d1fd | 376 | /* Mount units from /proc/self/mountinfo are not bound to devices by default since they're subject to |
47cd17ea LP |
377 | * races when mounts are established by other tools with different backing devices than what we |
378 | * maintain. The user can still force this to be a BindsTo= dependency with an appropriate option (or | |
379 | * udev property) so the mount units are automatically stopped when the device disappears | |
44b0d1fd | 380 | * suddenly. */ |
707ecf14 | 381 | dep = mount_is_bound_to_device(m) > 0 ? UNIT_BINDS_TO : UNIT_REQUIRES; |
ebc8968b | 382 | |
87c734ee FB |
383 | /* We always use 'what' from /proc/self/mountinfo if mounted */ |
384 | mask = m->from_proc_self_mountinfo ? UNIT_DEPENDENCY_MOUNTINFO : UNIT_DEPENDENCY_MOUNT_FILE; | |
385 | ||
386 | r = unit_add_node_dependency(UNIT(m), p->what, dep, mask); | |
dd144c63 LP |
387 | if (r < 0) |
388 | return r; | |
556b6f4e DDM |
389 | if (r > 0) |
390 | log_unit_trace(UNIT(m), "Added %s dependency on %s", unit_dependency_to_string(dep), p->what); | |
391 | ||
47cd17ea | 392 | if (mount_propagate_stop(m)) { |
87c734ee | 393 | r = unit_add_node_dependency(UNIT(m), p->what, UNIT_STOP_PROPAGATED_FROM, mask); |
47cd17ea 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", | |
398 | unit_dependency_to_string(UNIT_STOP_PROPAGATED_FROM), p->what); | |
47cd17ea | 399 | } |
9fff8a1f | 400 | |
87c734ee | 401 | r = unit_add_blockdev_dependency(UNIT(m), p->what, mask); |
556b6f4e DDM |
402 | if (r > 0) |
403 | log_unit_trace(UNIT(m), "Added %s dependency on %s", unit_dependency_to_string(UNIT_AFTER), p->what); | |
404 | ||
49267b1b | 405 | return 0; |
173a8d04 LP |
406 | } |
407 | ||
39c79477 | 408 | static bool mount_is_extrinsic(Unit *u) { |
e9fa1bf7 | 409 | Mount *m = ASSERT_PTR(MOUNT(u)); |
88ac30a1 TG |
410 | MountParameters *p; |
411 | ||
bc9e5a4c FB |
412 | /* Returns true for all units that are "magic" and should be excluded from the usual |
413 | * start-up and shutdown dependencies. We call them "extrinsic" here, as they are generally | |
414 | * mounted outside of the systemd dependency logic. We shouldn't attempt to manage them | |
415 | * ourselves but it's fine if the user operates on them with us. */ | |
ad2706db | 416 | |
bc9e5a4c | 417 | /* We only automatically manage mounts if we are in system mode */ |
39c79477 | 418 | if (MANAGER_IS_USER(u->manager)) |
b8e5776d LP |
419 | return true; |
420 | ||
88ac30a1 | 421 | p = get_mount_parameters(m); |
bc9e5a4c | 422 | if (p && fstab_is_extrinsic(m->where, p->options)) |
ad2706db | 423 | return true; |
88ac30a1 | 424 | |
ad2706db | 425 | return false; |
88ac30a1 TG |
426 | } |
427 | ||
92e64e9a LP |
428 | static bool mount_is_credentials(Mount *m) { |
429 | const char *e; | |
430 | ||
431 | assert(m); | |
432 | ||
433 | /* Returns true if this is a credentials mount. We don't want automatic dependencies on credential | |
434 | * mounts, since they are managed by us for even the earliest services, and we never want anything to | |
435 | * be ordered before them hence. */ | |
436 | ||
437 | e = path_startswith(m->where, UNIT(m)->manager->prefix[EXEC_DIRECTORY_RUNTIME]); | |
438 | if (!e) | |
439 | return false; | |
440 | ||
441 | return !isempty(path_startswith(e, "credentials")); | |
442 | } | |
443 | ||
87c734ee | 444 | static int mount_add_default_ordering_dependencies(Mount *m, MountParameters *p, UnitDependencyMask mask) { |
83cdc870 | 445 | const char *after, *before, *e; |
d54bab90 | 446 | int r; |
2edd4434 LP |
447 | |
448 | assert(m); | |
449 | ||
83cdc870 FB |
450 | e = path_startswith(m->where, "/sysroot"); |
451 | if (e && in_initrd()) { | |
452 | /* All mounts under /sysroot need to happen later, at initrd-fs.target time. IOW, | |
453 | * it's not technically part of the basic initrd filesystem itself, and so | |
6e017b19 WF |
454 | * shouldn't inherit the default Before=local-fs.target dependency. However, |
455 | * these mounts still need to start after local-fs-pre.target, as a sync point | |
760e99bb | 456 | * for things like systemd-hibernate-resume.service that should start before |
6e017b19 | 457 | * any mounts. */ |
83cdc870 | 458 | |
6e017b19 | 459 | after = SPECIAL_LOCAL_FS_PRE_TARGET; |
83cdc870 FB |
460 | before = isempty(e) ? SPECIAL_INITRD_ROOT_FS_TARGET : SPECIAL_INITRD_FS_TARGET; |
461 | ||
dbfc0960 | 462 | } else if (in_initrd() && path_startswith(m->where, "/sysusr/usr")) { |
6e017b19 | 463 | after = SPECIAL_LOCAL_FS_PRE_TARGET; |
dbfc0960 YW |
464 | before = SPECIAL_INITRD_USR_FS_TARGET; |
465 | ||
3c0a1b1e | 466 | } else if (mount_is_network(p)) { |
ea0ec5ce | 467 | after = SPECIAL_REMOTE_FS_PRE_TARGET; |
d54bab90 | 468 | before = SPECIAL_REMOTE_FS_TARGET; |
2ec15c4f | 469 | |
d54bab90 | 470 | } else { |
ea0ec5ce | 471 | after = SPECIAL_LOCAL_FS_PRE_TARGET; |
d54bab90 LP |
472 | before = SPECIAL_LOCAL_FS_TARGET; |
473 | } | |
474 | ||
92e64e9a | 475 | if (before && !mount_is_nofail(m)) { |
87c734ee | 476 | r = unit_add_dependency_by_name(UNIT(m), UNIT_BEFORE, before, /* add_reference= */ true, mask); |
8c8203db YW |
477 | if (r < 0) |
478 | return r; | |
479 | } | |
ea0ec5ce | 480 | |
92e64e9a LP |
481 | if (after) { |
482 | r = unit_add_dependency_by_name(UNIT(m), UNIT_AFTER, after, /* add_reference= */ true, mask); | |
483 | if (r < 0) | |
484 | return r; | |
485 | } | |
486 | ||
487 | r = unit_add_two_dependencies_by_name(UNIT(m), UNIT_BEFORE, UNIT_CONFLICTS, SPECIAL_UMOUNT_TARGET, | |
488 | /* add_reference= */ true, mask); | |
6e017b19 WF |
489 | if (r < 0) |
490 | return r; | |
e8d2f6cd | 491 | |
92e64e9a LP |
492 | /* If this is a tmpfs mount then we have to unmount it before we try to deactivate swaps */ |
493 | if (streq_ptr(p->fstype, "tmpfs") && !mount_is_credentials(m)) { | |
494 | r = unit_add_dependency_by_name(UNIT(m), UNIT_AFTER, SPECIAL_SWAP_TARGET, | |
495 | /* add_reference= */ true, mask); | |
496 | if (r < 0) | |
497 | return r; | |
498 | } | |
499 | ||
500 | return 0; | |
61154cf9 FB |
501 | } |
502 | ||
75b09529 LP |
503 | static int mount_add_default_network_dependencies(Mount *m, MountParameters *p, UnitDependencyMask mask) { |
504 | int r; | |
505 | ||
506 | assert(m); | |
507 | ||
508 | if (!mount_is_network(p)) | |
509 | return 0; | |
510 | ||
511 | /* We order ourselves after network.target. This is primarily useful at shutdown: services that take | |
512 | * down the network should order themselves before network.target, so that they are shut down only | |
513 | * after this mount unit is stopped. */ | |
514 | ||
515 | r = unit_add_dependency_by_name(UNIT(m), UNIT_AFTER, SPECIAL_NETWORK_TARGET, | |
516 | /* add_reference= */ true, mask); | |
6e017b19 WF |
517 | if (r < 0) |
518 | return r; | |
e8d2f6cd | 519 | |
75b09529 LP |
520 | /* We pull in network-online.target, and order ourselves after it. This is useful at start-up to |
521 | * actively pull in tools that want to be started before we start mounting network file systems, and | |
522 | * whose purpose it is to delay this until the network is "up". */ | |
523 | ||
524 | return unit_add_two_dependencies_by_name(UNIT(m), UNIT_WANTS, UNIT_AFTER, SPECIAL_NETWORK_ONLINE_TARGET, | |
87c734ee | 525 | /* add_reference= */ true, mask); |
61154cf9 FB |
526 | } |
527 | ||
2edd4434 | 528 | static int mount_add_default_dependencies(Mount *m) { |
87c734ee | 529 | UnitDependencyMask mask; |
9ddc4a26 | 530 | MountParameters *p; |
d54bab90 | 531 | int r; |
2edd4434 LP |
532 | |
533 | assert(m); | |
534 | ||
4c9ea260 LP |
535 | if (!UNIT(m)->default_dependencies) |
536 | return 0; | |
537 | ||
61154cf9 FB |
538 | /* We do not add any default dependencies to /, /usr or /run/initramfs/, since they are |
539 | * guaranteed to stay mounted the whole time, since our system is on it. Also, don't | |
540 | * bother with anything mounted below virtual file systems, it's also going to be virtual, | |
541 | * and hence not worth the effort. */ | |
39c79477 | 542 | if (mount_is_extrinsic(UNIT(m))) |
6b1dc2bd | 543 | return 0; |
2edd4434 | 544 | |
874d3404 LP |
545 | p = get_mount_parameters(m); |
546 | if (!p) | |
6b1dc2bd LP |
547 | return 0; |
548 | ||
87c734ee FB |
549 | mask = m->from_proc_self_mountinfo ? UNIT_DEPENDENCY_MOUNTINFO : UNIT_DEPENDENCY_MOUNT_FILE; |
550 | ||
551 | r = mount_add_default_ordering_dependencies(m, p, mask); | |
ad2706db LP |
552 | if (r < 0) |
553 | return r; | |
eef85c4a | 554 | |
75b09529 LP |
555 | r = mount_add_default_network_dependencies(m, p, mask); |
556 | if (r < 0) | |
557 | return r; | |
3e3852b3 | 558 | |
84214541 | 559 | return 0; |
2edd4434 LP |
560 | } |
561 | ||
8d567588 | 562 | static int mount_verify(Mount *m) { |
a57f7e2c | 563 | _cleanup_free_ char *e = NULL; |
b294b79f | 564 | MountParameters *p; |
7410616c | 565 | int r; |
a57f7e2c | 566 | |
8d567588 | 567 | assert(m); |
75193d41 | 568 | assert(UNIT(m)->load_state == UNIT_LOADED); |
8d567588 | 569 | |
1df96fcb | 570 | if (!m->from_fragment && !m->from_proc_self_mountinfo && !UNIT(m)->perpetual) |
8cbef760 LP |
571 | return -ENOENT; |
572 | ||
7410616c LP |
573 | r = unit_name_from_path(m->where, ".mount", &e); |
574 | if (r < 0) | |
f2341e0a | 575 | return log_unit_error_errno(UNIT(m), r, "Failed to generate unit name from mount path: %m"); |
8d567588 | 576 | |
d85ff944 YW |
577 | if (!unit_has_name(UNIT(m), e)) |
578 | return log_unit_error_errno(UNIT(m), SYNTHETIC_ERRNO(ENOEXEC), "Where= setting doesn't match unit name. Refusing."); | |
8d567588 | 579 | |
d85ff944 YW |
580 | if (mount_point_is_api(m->where) || mount_point_ignore(m->where)) |
581 | return log_unit_error_errno(UNIT(m), SYNTHETIC_ERRNO(ENOEXEC), "Cannot create mount unit for API file system %s. Refusing.", m->where); | |
33ff02c9 | 582 | |
b294b79f | 583 | p = get_mount_parameters_fragment(m); |
0879fbd6 LP |
584 | if (p && !p->what && !UNIT(m)->perpetual) |
585 | return log_unit_error_errno(UNIT(m), SYNTHETIC_ERRNO(ENOEXEC), | |
586 | "What= setting is missing. Refusing."); | |
4e85aff4 | 587 | |
d85ff944 YW |
588 | if (m->exec_context.pam_name && m->kill_context.kill_mode != KILL_CONTROL_GROUP) |
589 | return log_unit_error_errno(UNIT(m), SYNTHETIC_ERRNO(ENOEXEC), "Unit has PAM enabled. Kill mode must be set to control-group'. Refusing."); | |
4d0e5dbd | 590 | |
8d567588 LP |
591 | return 0; |
592 | } | |
593 | ||
bf7eedbf LP |
594 | static int mount_add_non_exec_dependencies(Mount *m) { |
595 | int r; | |
49267b1b | 596 | |
bf7eedbf LP |
597 | assert(m); |
598 | ||
9c77ffc7 FB |
599 | /* We may be called due to this mount appearing in /proc/self/mountinfo, hence we clear all existing |
600 | * dependencies that were initialized from the unit file but whose final value really depends on the | |
601 | * content of /proc/self/mountinfo. Some (such as m->where) might have become stale now. */ | |
87c734ee | 602 | unit_remove_dependencies(UNIT(m), UNIT_DEPENDENCY_MOUNTINFO | UNIT_DEPENDENCY_MOUNT_FILE); |
49267b1b YW |
603 | |
604 | if (!m->where) | |
605 | return 0; | |
606 | ||
bf7eedbf LP |
607 | /* Adds in all dependencies directly responsible for ordering the mount, as opposed to dependencies |
608 | * resulting from the ExecContext and such. */ | |
609 | ||
610 | r = mount_add_device_dependencies(m); | |
611 | if (r < 0) | |
612 | return r; | |
613 | ||
614 | r = mount_add_mount_dependencies(m); | |
615 | if (r < 0) | |
616 | return r; | |
617 | ||
bf7eedbf LP |
618 | r = mount_add_default_dependencies(m); |
619 | if (r < 0) | |
620 | return r; | |
621 | ||
622 | return 0; | |
623 | } | |
624 | ||
1a4ac875 | 625 | static int mount_add_extras(Mount *m) { |
e9fa1bf7 | 626 | Unit *u = UNIT(ASSERT_PTR(m)); |
e537352b LP |
627 | int r; |
628 | ||
1f736476 LP |
629 | /* Note: this call might be called after we already have been loaded once (and even when it has already been |
630 | * activated), in case data from /proc/self/mountinfo has changed. This means all code here needs to be ready | |
631 | * to run with an already set up unit. */ | |
632 | ||
e821075a | 633 | if (u->fragment_path) |
1a4ac875 | 634 | m->from_fragment = true; |
e537352b | 635 | |
1a4ac875 | 636 | if (!m->where) { |
7410616c | 637 | r = unit_name_to_path(u->id, &m->where); |
1d0727e7 MS |
638 | if (r == -ENAMETOOLONG) |
639 | log_unit_error_errno(u, r, "Failed to derive mount point path from unit name, because unit name is hashed. " | |
640 | "Set \"Where=\" in the unit file explicitly."); | |
7410616c LP |
641 | if (r < 0) |
642 | return r; | |
1a4ac875 | 643 | } |
a16e1123 | 644 | |
4ff361cc | 645 | path_simplify(m->where); |
e537352b | 646 | |
e821075a | 647 | if (!u->description) { |
1a4ac875 MS |
648 | r = unit_set_description(u, m->where); |
649 | if (r < 0) | |
173a8d04 | 650 | return r; |
1a4ac875 | 651 | } |
6e2ef85b | 652 | |
3c0a1b1e DDM |
653 | if (mount_is_credentials(m)) |
654 | u->default_dependencies = false; | |
655 | ||
598459ce LP |
656 | r = unit_patch_contexts(u); |
657 | if (r < 0) | |
658 | return r; | |
4e67ddd6 | 659 | |
598459ce | 660 | r = unit_add_exec_dependencies(u, &m->exec_context); |
a016b922 LP |
661 | if (r < 0) |
662 | return r; | |
663 | ||
d79200e2 | 664 | r = unit_set_default_slice(u); |
1a4ac875 MS |
665 | if (r < 0) |
666 | return r; | |
667 | ||
bf7eedbf | 668 | r = mount_add_non_exec_dependencies(m); |
4c9ea260 LP |
669 | if (r < 0) |
670 | return r; | |
598459ce | 671 | |
1a4ac875 MS |
672 | return 0; |
673 | } | |
674 | ||
75193d41 | 675 | static void mount_load_root_mount(Unit *u) { |
e9fa1bf7 | 676 | Mount *m = ASSERT_PTR(MOUNT(u)); |
11222d0f LP |
677 | |
678 | if (!unit_has_name(u, SPECIAL_ROOT_MOUNT)) | |
75193d41 | 679 | return; |
11222d0f LP |
680 | |
681 | u->perpetual = true; | |
682 | u->default_dependencies = false; | |
683 | ||
684 | /* The stdio/kmsg bridge socket is on /, in order to avoid a dep loop, don't use kmsg logging for -.mount */ | |
e9fa1bf7 MY |
685 | m->exec_context.std_output = EXEC_OUTPUT_NULL; |
686 | m->exec_context.std_input = EXEC_INPUT_NULL; | |
11222d0f LP |
687 | |
688 | if (!u->description) | |
689 | u->description = strdup("Root Mount"); | |
11222d0f LP |
690 | } |
691 | ||
1a4ac875 | 692 | static int mount_load(Unit *u) { |
e9fa1bf7 MY |
693 | Mount *m = ASSERT_PTR(MOUNT(u)); |
694 | int r; | |
1a4ac875 | 695 | |
1a4ac875 MS |
696 | assert(u->load_state == UNIT_STUB); |
697 | ||
75193d41 | 698 | mount_load_root_mount(u); |
11222d0f | 699 | |
4ecb673e MY |
700 | bool from_kernel = m->from_proc_self_mountinfo || u->perpetual; |
701 | ||
702 | r = unit_load_fragment_and_dropin(u, /* fragment_required = */ !from_kernel); | |
780ae022 LP |
703 | |
704 | /* Add in some extras. Note we do this in all cases (even if we failed to load the unit) when announced by the | |
705 | * kernel, because we need some things to be set up no matter what when the kernel establishes a mount and thus | |
706 | * we need to update the state in our unit to track it. After all, consider that we don't allow changing the | |
707 | * 'slice' field for a unit once it is active. */ | |
4ecb673e MY |
708 | if (u->load_state == UNIT_LOADED || from_kernel) |
709 | RET_GATHER(r, mount_add_extras(m)); | |
780ae022 | 710 | |
1a4ac875 MS |
711 | if (r < 0) |
712 | return r; | |
4ecb673e | 713 | |
75193d41 ZJS |
714 | if (u->load_state != UNIT_LOADED) |
715 | return 0; | |
e537352b | 716 | |
8d567588 | 717 | return mount_verify(m); |
e537352b LP |
718 | } |
719 | ||
720 | static void mount_set_state(Mount *m, MountState state) { | |
721 | MountState old_state; | |
e9fa1bf7 | 722 | |
e537352b LP |
723 | assert(m); |
724 | ||
6fcbec6f LP |
725 | if (m->state != state) |
726 | bus_unit_send_pending_change_signal(UNIT(m), false); | |
727 | ||
e537352b LP |
728 | old_state = m->state; |
729 | m->state = state; | |
730 | ||
c634f3d2 | 731 | if (!MOUNT_STATE_WITH_PROCESS(state)) { |
5dcadb4c | 732 | m->timer_event_source = sd_event_source_disable_unref(m->timer_event_source); |
a16e1123 | 733 | mount_unwatch_control_pid(m); |
e537352b | 734 | m->control_command = NULL; |
a16e1123 | 735 | m->control_command_id = _MOUNT_EXEC_COMMAND_INVALID; |
e537352b LP |
736 | } |
737 | ||
738 | if (state != old_state) | |
f2341e0a | 739 | log_unit_debug(UNIT(m), "Changed %s -> %s", mount_state_to_string(old_state), mount_state_to_string(state)); |
e537352b | 740 | |
96b09de5 | 741 | unit_notify(UNIT(m), state_translation_table[old_state], state_translation_table[state], m->reload_result == MOUNT_SUCCESS); |
e537352b LP |
742 | } |
743 | ||
be847e82 | 744 | static int mount_coldplug(Unit *u) { |
e9fa1bf7 | 745 | Mount *m = ASSERT_PTR(MOUNT(u)); |
a16e1123 | 746 | int r; |
e537352b | 747 | |
e537352b LP |
748 | assert(m->state == MOUNT_DEAD); |
749 | ||
01400460 | 750 | if (m->deserialized_state == m->state) |
5bcb0f2b | 751 | return 0; |
e537352b | 752 | |
360f384f | 753 | if (pidref_is_set(&m->control_pid) && |
4d9f092b | 754 | pidref_is_unwaited(&m->control_pid) > 0 && |
01400460 | 755 | MOUNT_STATE_WITH_PROCESS(m->deserialized_state)) { |
5bcb0f2b | 756 | |
495e75ed | 757 | r = unit_watch_pidref(UNIT(m), &m->control_pid, /* exclusive= */ false); |
5bcb0f2b LP |
758 | if (r < 0) |
759 | return r; | |
e537352b | 760 | |
e9276800 | 761 | r = mount_arm_timer(m, /* relative= */ false, usec_add(u->state_change_timestamp.monotonic, m->timeout_usec)); |
5bcb0f2b LP |
762 | if (r < 0) |
763 | return r; | |
a16e1123 | 764 | } |
e537352b | 765 | |
9cc54544 | 766 | if (!IN_SET(m->deserialized_state, MOUNT_DEAD, MOUNT_FAILED)) { |
e8a565cb | 767 | (void) unit_setup_exec_runtime(u); |
9cc54544 LP |
768 | (void) unit_setup_cgroup_runtime(u); |
769 | } | |
29206d46 | 770 | |
01400460 | 771 | mount_set_state(m, m->deserialized_state); |
e537352b | 772 | return 0; |
e537352b LP |
773 | } |
774 | ||
01400460 | 775 | static void mount_catchup(Unit *u) { |
e9fa1bf7 | 776 | Mount *m = ASSERT_PTR(MOUNT(u)); |
01400460 YW |
777 | |
778 | /* Adjust the deserialized state. See comments in mount_process_proc_self_mountinfo(). */ | |
779 | if (m->from_proc_self_mountinfo) | |
780 | switch (m->state) { | |
781 | case MOUNT_DEAD: | |
782 | case MOUNT_FAILED: | |
360f384f | 783 | assert(!pidref_is_set(&m->control_pid)); |
039f4284 | 784 | (void) unit_acquire_invocation_id(u); |
01400460 YW |
785 | mount_cycle_clear(m); |
786 | mount_enter_mounted(m, MOUNT_SUCCESS); | |
787 | break; | |
788 | case MOUNT_MOUNTING: | |
360f384f | 789 | assert(pidref_is_set(&m->control_pid)); |
01400460 YW |
790 | mount_set_state(m, MOUNT_MOUNTING_DONE); |
791 | break; | |
792 | default: | |
793 | break; | |
794 | } | |
795 | else | |
796 | switch (m->state) { | |
797 | case MOUNT_MOUNTING_DONE: | |
360f384f | 798 | assert(pidref_is_set(&m->control_pid)); |
01400460 YW |
799 | mount_set_state(m, MOUNT_MOUNTING); |
800 | break; | |
801 | case MOUNT_MOUNTED: | |
360f384f | 802 | assert(!pidref_is_set(&m->control_pid)); |
e3783068 | 803 | mount_enter_dead(m, MOUNT_SUCCESS, /* flush_result = */ false); |
01400460 YW |
804 | break; |
805 | default: | |
806 | break; | |
807 | } | |
808 | } | |
809 | ||
e537352b | 810 | static void mount_dump(Unit *u, FILE *f, const char *prefix) { |
e9fa1bf7 | 811 | Mount *m = ASSERT_PTR(MOUNT(u)); |
e537352b | 812 | MountParameters *p; |
b9e4d9ba | 813 | const char *prefix2; |
e537352b | 814 | |
e537352b LP |
815 | assert(f); |
816 | ||
b9e4d9ba LP |
817 | prefix = strempty(prefix); |
818 | prefix2 = strjoina(prefix, "\t"); | |
819 | ||
cb39ed3f | 820 | p = get_mount_parameters(m); |
e537352b LP |
821 | |
822 | fprintf(f, | |
823 | "%sMount State: %s\n" | |
81a5c6d0 | 824 | "%sResult: %s\n" |
17e9d53d | 825 | "%sClean Result: %s\n" |
e537352b LP |
826 | "%sWhere: %s\n" |
827 | "%sWhat: %s\n" | |
828 | "%sFile System Type: %s\n" | |
829 | "%sOptions: %s\n" | |
e537352b LP |
830 | "%sFrom /proc/self/mountinfo: %s\n" |
831 | "%sFrom fragment: %s\n" | |
ad2706db | 832 | "%sExtrinsic: %s\n" |
e520950a | 833 | "%sDirectoryMode: %04o\n" |
49915de2 | 834 | "%sSloppyOptions: %s\n" |
4f8d40a9 | 835 | "%sLazyUnmount: %s\n" |
91899792 | 836 | "%sForceUnmount: %s\n" |
c600357b | 837 | "%sReadWriteOnly: %s\n" |
ac8956ef | 838 | "%sTimeoutSec: %s\n", |
a16e1123 | 839 | prefix, mount_state_to_string(m->state), |
81a5c6d0 | 840 | prefix, mount_result_to_string(m->result), |
17e9d53d | 841 | prefix, mount_result_to_string(m->clean_result), |
e537352b | 842 | prefix, m->where, |
1e4fc9b1 HH |
843 | prefix, p ? strna(p->what) : "n/a", |
844 | prefix, p ? strna(p->fstype) : "n/a", | |
845 | prefix, p ? strna(p->options) : "n/a", | |
e537352b LP |
846 | prefix, yes_no(m->from_proc_self_mountinfo), |
847 | prefix, yes_no(m->from_fragment), | |
39c79477 | 848 | prefix, yes_no(mount_is_extrinsic(u)), |
e520950a | 849 | prefix, m->directory_mode, |
49915de2 | 850 | prefix, yes_no(m->sloppy_options), |
4f8d40a9 | 851 | prefix, yes_no(m->lazy_unmount), |
91899792 | 852 | prefix, yes_no(m->force_unmount), |
c600357b | 853 | prefix, yes_no(m->read_write_only), |
5291f26d | 854 | prefix, FORMAT_TIMESPAN(m->timeout_usec, USEC_PER_SEC)); |
e537352b | 855 | |
360f384f | 856 | if (pidref_is_set(&m->control_pid)) |
e537352b | 857 | fprintf(f, |
ccd06097 | 858 | "%sControl PID: "PID_FMT"\n", |
360f384f | 859 | prefix, m->control_pid.pid); |
e537352b LP |
860 | |
861 | exec_context_dump(&m->exec_context, f, prefix); | |
4819ff03 | 862 | kill_context_dump(&m->kill_context, f, prefix); |
bc0623df | 863 | cgroup_context_dump(UNIT(m), f, prefix); |
b9e4d9ba LP |
864 | |
865 | for (MountExecCommand c = 0; c < _MOUNT_EXEC_COMMAND_MAX; c++) { | |
866 | if (!m->exec_command[c].argv) | |
867 | continue; | |
868 | ||
869 | fprintf(f, "%s%s %s:\n", | |
870 | prefix, special_glyph(SPECIAL_GLYPH_ARROW_RIGHT), mount_exec_command_to_string(c)); | |
871 | ||
872 | exec_command_dump(m->exec_command + c, f, prefix2); | |
873 | } | |
e537352b LP |
874 | } |
875 | ||
360f384f | 876 | static int mount_spawn(Mount *m, ExecCommand *c, PidRef *ret_pid) { |
fba173ff | 877 | _cleanup_(exec_params_shallow_clear) ExecParameters exec_params = EXEC_PARAMETERS_INIT( |
b646fc32 | 878 | EXEC_APPLY_SANDBOXING|EXEC_APPLY_CHROOT|EXEC_APPLY_TTY_STDIN); |
360f384f | 879 | _cleanup_(pidref_done) PidRef pidref = PIDREF_NULL; |
3c7416b6 | 880 | int r; |
a16e1123 LP |
881 | |
882 | assert(m); | |
883 | assert(c); | |
ef25552e | 884 | assert(ret_pid); |
a16e1123 | 885 | |
3c7416b6 | 886 | r = unit_prepare_exec(UNIT(m)); |
29206d46 LP |
887 | if (r < 0) |
888 | return r; | |
889 | ||
e9276800 | 890 | r = mount_arm_timer(m, /* relative= */ true, m->timeout_usec); |
36697dc0 | 891 | if (r < 0) |
36c16a7c | 892 | return r; |
a16e1123 | 893 | |
1ad6e8b3 LP |
894 | r = unit_set_exec_params(UNIT(m), &exec_params); |
895 | if (r < 0) | |
896 | return r; | |
9fa95f85 | 897 | |
f2341e0a LP |
898 | r = exec_spawn(UNIT(m), |
899 | c, | |
4ad49000 | 900 | &m->exec_context, |
9fa95f85 | 901 | &exec_params, |
613b411c | 902 | m->exec_runtime, |
6bb00842 | 903 | &m->cgroup_context, |
556d2bc4 | 904 | &pidref); |
4ad49000 | 905 | if (r < 0) |
36c16a7c | 906 | return r; |
a16e1123 | 907 | |
495e75ed | 908 | r = unit_watch_pidref(UNIT(m), &pidref, /* exclusive= */ true); |
360f384f LP |
909 | if (r < 0) |
910 | return r; | |
911 | ||
912 | *ret_pid = TAKE_PIDREF(pidref); | |
a16e1123 | 913 | return 0; |
a16e1123 LP |
914 | } |
915 | ||
e3783068 | 916 | static void mount_enter_dead(Mount *m, MountResult f, bool flush_result) { |
e537352b LP |
917 | assert(m); |
918 | ||
e3783068 | 919 | if (m->result == MOUNT_SUCCESS || flush_result) |
9d2f5178 | 920 | m->result = f; |
e537352b | 921 | |
aac99f30 | 922 | unit_log_result(UNIT(m), m->result == MOUNT_SUCCESS, mount_result_to_string(m->result)); |
4c425434 LP |
923 | unit_warn_leftover_processes(UNIT(m), unit_log_leftover_process_stop); |
924 | ||
29206d46 LP |
925 | mount_set_state(m, m->result != MOUNT_SUCCESS ? MOUNT_FAILED : MOUNT_DEAD); |
926 | ||
28135da3 | 927 | m->exec_runtime = exec_runtime_destroy(m->exec_runtime); |
613b411c | 928 | |
bb0c0d6f | 929 | unit_destroy_runtime_data(UNIT(m), &m->exec_context); |
e66cf1a3 | 930 | |
00d9ef85 LP |
931 | unit_unref_uid_gid(UNIT(m), true); |
932 | ||
49267b1b YW |
933 | /* Any dependencies based on /proc/self/mountinfo are now stale. Let's re-generate dependencies from |
934 | * .mount unit. */ | |
935 | (void) mount_add_non_exec_dependencies(m); | |
e537352b LP |
936 | } |
937 | ||
9d2f5178 | 938 | static void mount_enter_mounted(Mount *m, MountResult f) { |
80876c20 LP |
939 | assert(m); |
940 | ||
a0fef983 | 941 | if (m->result == MOUNT_SUCCESS) |
9d2f5178 | 942 | m->result = f; |
80876c20 LP |
943 | |
944 | mount_set_state(m, MOUNT_MOUNTED); | |
945 | } | |
946 | ||
e3783068 | 947 | static void mount_enter_dead_or_mounted(Mount *m, MountResult f, bool flush_result) { |
22af0e58 LP |
948 | assert(m); |
949 | ||
e3783068 MY |
950 | /* Enter DEAD or MOUNTED state, depending on what the kernel currently says about the mount point. |
951 | * We use this whenever we executed an operation, so that our internal state reflects what | |
952 | * the kernel says again, after all ultimately we just mirror the kernel's internal state on this. | |
953 | * | |
954 | * Note that flush_result only applies to mount_enter_dead(), since that's when the result gets | |
955 | * turned into unit end state. */ | |
22af0e58 LP |
956 | |
957 | if (m->from_proc_self_mountinfo) | |
958 | mount_enter_mounted(m, f); | |
959 | else | |
e3783068 | 960 | mount_enter_dead(m, f, flush_result); |
22af0e58 LP |
961 | } |
962 | ||
963 | static int state_to_kill_operation(MountState state) { | |
964 | switch (state) { | |
965 | ||
966 | case MOUNT_REMOUNTING_SIGTERM: | |
a232ebcc ZJS |
967 | return KILL_RESTART; |
968 | ||
22af0e58 LP |
969 | case MOUNT_UNMOUNTING_SIGTERM: |
970 | return KILL_TERMINATE; | |
971 | ||
972 | case MOUNT_REMOUNTING_SIGKILL: | |
973 | case MOUNT_UNMOUNTING_SIGKILL: | |
974 | return KILL_KILL; | |
975 | ||
976 | default: | |
977 | return _KILL_OPERATION_INVALID; | |
978 | } | |
979 | } | |
980 | ||
9d2f5178 | 981 | static void mount_enter_signal(Mount *m, MountState state, MountResult f) { |
e537352b LP |
982 | int r; |
983 | ||
984 | assert(m); | |
985 | ||
a0fef983 | 986 | if (m->result == MOUNT_SUCCESS) |
9d2f5178 | 987 | m->result = f; |
e537352b | 988 | |
b826e317 | 989 | r = unit_kill_context(UNIT(m), state_to_kill_operation(state)); |
d30eb0b5 LP |
990 | if (r < 0) { |
991 | log_unit_warning_errno(UNIT(m), r, "Failed to kill processes: %m"); | |
cd2086fe | 992 | goto fail; |
d30eb0b5 | 993 | } |
e537352b | 994 | |
cd2086fe | 995 | if (r > 0) { |
e9276800 | 996 | r = mount_arm_timer(m, /* relative= */ true, m->timeout_usec); |
d30eb0b5 LP |
997 | if (r < 0) { |
998 | log_unit_warning_errno(UNIT(m), r, "Failed to install timer: %m"); | |
80876c20 | 999 | goto fail; |
d30eb0b5 | 1000 | } |
e537352b | 1001 | |
80876c20 | 1002 | mount_set_state(m, state); |
22af0e58 | 1003 | } else if (state == MOUNT_REMOUNTING_SIGTERM && m->kill_context.send_sigkill) |
ac84d1fb | 1004 | mount_enter_signal(m, MOUNT_REMOUNTING_SIGKILL, MOUNT_SUCCESS); |
22af0e58 | 1005 | else if (IN_SET(state, MOUNT_REMOUNTING_SIGTERM, MOUNT_REMOUNTING_SIGKILL)) |
9d2f5178 | 1006 | mount_enter_mounted(m, MOUNT_SUCCESS); |
22af0e58 | 1007 | else if (state == MOUNT_UNMOUNTING_SIGTERM && m->kill_context.send_sigkill) |
ac84d1fb | 1008 | mount_enter_signal(m, MOUNT_UNMOUNTING_SIGKILL, MOUNT_SUCCESS); |
80876c20 | 1009 | else |
e3783068 | 1010 | mount_enter_dead_or_mounted(m, MOUNT_SUCCESS, /* flush_result = */ false); |
e537352b LP |
1011 | |
1012 | return; | |
1013 | ||
1014 | fail: | |
e3783068 | 1015 | mount_enter_dead_or_mounted(m, MOUNT_FAILURE_RESOURCES, /* flush_result = */ false); |
5261ba90 TT |
1016 | } |
1017 | ||
d30eb0b5 LP |
1018 | static int mount_set_umount_command(Mount *m, ExecCommand *c) { |
1019 | int r; | |
1020 | ||
1021 | assert(m); | |
1022 | assert(c); | |
1023 | ||
1024 | r = exec_command_set(c, UMOUNT_PATH, m->where, "-c", NULL); | |
1025 | if (r < 0) | |
1026 | return r; | |
1027 | ||
1028 | if (m->lazy_unmount) { | |
1029 | r = exec_command_append(c, "-l", NULL); | |
1030 | if (r < 0) | |
1031 | return r; | |
1032 | } | |
1033 | ||
1034 | if (m->force_unmount) { | |
1035 | r = exec_command_append(c, "-f", NULL); | |
1036 | if (r < 0) | |
1037 | return r; | |
1038 | } | |
1039 | ||
1040 | return 0; | |
1041 | } | |
1042 | ||
9d2f5178 | 1043 | static void mount_enter_unmounting(Mount *m) { |
e537352b LP |
1044 | int r; |
1045 | ||
1046 | assert(m); | |
1047 | ||
7d54a03a LP |
1048 | /* Start counting our attempts */ |
1049 | if (!IN_SET(m->state, | |
1050 | MOUNT_UNMOUNTING, | |
1051 | MOUNT_UNMOUNTING_SIGTERM, | |
e323d2e4 | 1052 | MOUNT_UNMOUNTING_SIGKILL)) |
7d54a03a LP |
1053 | m->n_retry_umount = 0; |
1054 | ||
a16e1123 LP |
1055 | m->control_command_id = MOUNT_EXEC_UNMOUNT; |
1056 | m->control_command = m->exec_command + MOUNT_EXEC_UNMOUNT; | |
e537352b | 1057 | |
d30eb0b5 LP |
1058 | r = mount_set_umount_command(m, m->control_command); |
1059 | if (r < 0) { | |
1060 | log_unit_warning_errno(UNIT(m), r, "Failed to prepare umount command line: %m"); | |
e537352b | 1061 | goto fail; |
d30eb0b5 | 1062 | } |
e537352b | 1063 | |
a16e1123 | 1064 | mount_unwatch_control_pid(m); |
5e94833f | 1065 | |
7d54a03a | 1066 | r = mount_spawn(m, m->control_command, &m->control_pid); |
d30eb0b5 LP |
1067 | if (r < 0) { |
1068 | log_unit_warning_errno(UNIT(m), r, "Failed to spawn 'umount' task: %m"); | |
e537352b | 1069 | goto fail; |
d30eb0b5 | 1070 | } |
e537352b LP |
1071 | |
1072 | mount_set_state(m, MOUNT_UNMOUNTING); | |
e323d2e4 | 1073 | |
e537352b LP |
1074 | return; |
1075 | ||
1076 | fail: | |
e3783068 | 1077 | mount_enter_dead_or_mounted(m, MOUNT_FAILURE_RESOURCES, /* flush_result = */ false); |
e537352b LP |
1078 | } |
1079 | ||
d30eb0b5 LP |
1080 | static int mount_set_mount_command(Mount *m, ExecCommand *c, const MountParameters *p) { |
1081 | int r; | |
1082 | ||
1083 | assert(m); | |
1084 | assert(c); | |
1085 | assert(p); | |
1086 | ||
1087 | r = exec_command_set(c, MOUNT_PATH, p->what, m->where, NULL); | |
1088 | if (r < 0) | |
1089 | return r; | |
1090 | ||
1091 | if (m->sloppy_options) { | |
1092 | r = exec_command_append(c, "-s", NULL); | |
1093 | if (r < 0) | |
1094 | return r; | |
1095 | } | |
1096 | ||
1097 | if (m->read_write_only) { | |
1098 | r = exec_command_append(c, "-w", NULL); | |
1099 | if (r < 0) | |
1100 | return r; | |
1101 | } | |
1102 | ||
1103 | if (p->fstype) { | |
1104 | r = exec_command_append(c, "-t", p->fstype, NULL); | |
1105 | if (r < 0) | |
1106 | return r; | |
1107 | } | |
1108 | ||
1109 | _cleanup_free_ char *opts = NULL; | |
1110 | r = fstab_filter_options(p->options, "nofail\0" "noauto\0" "auto\0", NULL, NULL, NULL, &opts); | |
1111 | if (r < 0) | |
1112 | return r; | |
1113 | ||
1114 | if (!isempty(opts)) { | |
1115 | r = exec_command_append(c, "-o", opts, NULL); | |
1116 | if (r < 0) | |
1117 | return r; | |
1118 | } | |
1119 | ||
1120 | return 0; | |
1121 | } | |
1122 | ||
8d567588 | 1123 | static void mount_enter_mounting(Mount *m) { |
cb39ed3f | 1124 | MountParameters *p; |
218cfe23 | 1125 | bool source_is_dir = true; |
e9fa1bf7 | 1126 | int r; |
e537352b LP |
1127 | |
1128 | assert(m); | |
1129 | ||
25cd4964 | 1130 | r = unit_fail_if_noncanonical(UNIT(m), m->where); |
f2341e0a LP |
1131 | if (r < 0) |
1132 | goto fail; | |
1133 | ||
218cfe23 DT |
1134 | p = get_mount_parameters_fragment(m); |
1135 | if (p && mount_is_bind(p)) { | |
1136 | r = is_dir(p->what, /* follow = */ true); | |
1137 | if (r < 0 && r != -ENOENT) | |
1138 | log_unit_info_errno(UNIT(m), r, "Failed to determine type of bind mount source '%s', ignoring: %m", p->what); | |
1139 | else if (r == 0) | |
1140 | source_is_dir = false; | |
1141 | } | |
3e5235b0 | 1142 | |
218cfe23 | 1143 | if (source_is_dir) |
ce427d0e | 1144 | r = mkdir_p_label(m->where, m->directory_mode); |
218cfe23 | 1145 | else |
ce427d0e DDM |
1146 | r = touch_file(m->where, /* parents = */ true, USEC_INFINITY, UID_INVALID, GID_INVALID, MODE_INVALID); |
1147 | if (r < 0 && r != -EEXIST) | |
1148 | log_unit_warning_errno(UNIT(m), r, "Failed to create mount point '%s', ignoring: %m", m->where); | |
218cfe23 | 1149 | |
6c75eff6 | 1150 | /* If we are asked to create an OverlayFS, create the upper/work directories if they are missing */ |
9614dd54 | 1151 | if (p && streq_ptr(p->fstype, "overlay")) { |
6c75eff6 LB |
1152 | _cleanup_strv_free_ char **dirs = NULL; |
1153 | ||
1154 | r = fstab_filter_options( | |
1155 | p->options, | |
1156 | "upperdir\0workdir\0", | |
1157 | /* ret_namefound= */ NULL, | |
1158 | /* ret_value= */ NULL, | |
1159 | &dirs, | |
1160 | /* ret_filtered= */ NULL); | |
1161 | if (r < 0) | |
1162 | log_unit_warning_errno( | |
1163 | UNIT(m), | |
1164 | r, | |
1165 | "Failed to determine upper directory for OverlayFS, ignoring: %m"); | |
1166 | else | |
1167 | STRV_FOREACH(d, dirs) { | |
1168 | r = mkdir_p_label(*d, m->directory_mode); | |
1169 | if (r < 0 && r != -EEXIST) | |
1170 | log_unit_warning_errno( | |
1171 | UNIT(m), | |
1172 | r, | |
1173 | "Failed to create overlay directory '%s', ignoring: %m", | |
1174 | *d); | |
1175 | } | |
1176 | } | |
1177 | ||
218cfe23 DT |
1178 | if (source_is_dir) |
1179 | unit_warn_if_dir_nonempty(UNIT(m), m->where); | |
4c425434 | 1180 | unit_warn_leftover_processes(UNIT(m), unit_log_leftover_process_start); |
a4634b21 LP |
1181 | |
1182 | m->control_command_id = MOUNT_EXEC_MOUNT; | |
1183 | m->control_command = m->exec_command + MOUNT_EXEC_MOUNT; | |
1184 | ||
cb39ed3f | 1185 | /* Create the source directory for bind-mounts if needed */ |
5dc60faa AP |
1186 | if (p && mount_is_bind(p)) { |
1187 | r = mkdir_p_label(p->what, m->directory_mode); | |
237ecfee | 1188 | /* mkdir_p_label() can return -EEXIST if the target path exists and is not a directory - which is |
574febda YW |
1189 | * totally OK, in case the user wants us to overmount a non-directory inode. Also -EROFS can be |
1190 | * returned on read-only filesystem. Moreover, -EACCES (and also maybe -EPERM?) may be returned | |
1191 | * when the path is on NFS. See issue #24120. All such errors will be logged in the debug level. */ | |
e5e6b7c2 | 1192 | if (r < 0 && r != -EEXIST) |
574febda YW |
1193 | log_unit_full_errno(UNIT(m), |
1194 | (r == -EROFS || ERRNO_IS_PRIVILEGE(r)) ? LOG_DEBUG : LOG_WARNING, | |
1195 | r, "Failed to make bind mount source '%s', ignoring: %m", p->what); | |
5dc60faa | 1196 | } |
5261ba90 | 1197 | |
b294b79f | 1198 | if (p) { |
d30eb0b5 LP |
1199 | r = mount_set_mount_command(m, m->control_command, p); |
1200 | if (r < 0) { | |
1201 | log_unit_warning_errno(UNIT(m), r, "Failed to prepare mount command line: %m"); | |
17a1c597 | 1202 | goto fail; |
d30eb0b5 LP |
1203 | } |
1204 | } else { | |
1205 | r = log_unit_warning_errno(UNIT(m), SYNTHETIC_ERRNO(ENOENT), "No mount parameters to operate on."); | |
e537352b | 1206 | goto fail; |
d30eb0b5 | 1207 | } |
e537352b | 1208 | |
a16e1123 | 1209 | mount_unwatch_control_pid(m); |
5e94833f | 1210 | |
257f1d8e | 1211 | r = mount_spawn(m, m->control_command, &m->control_pid); |
d30eb0b5 LP |
1212 | if (r < 0) { |
1213 | log_unit_warning_errno(UNIT(m), r, "Failed to spawn 'mount' task: %m"); | |
e537352b | 1214 | goto fail; |
d30eb0b5 | 1215 | } |
e537352b LP |
1216 | |
1217 | mount_set_state(m, MOUNT_MOUNTING); | |
e537352b LP |
1218 | return; |
1219 | ||
1220 | fail: | |
e3783068 | 1221 | mount_enter_dead_or_mounted(m, MOUNT_FAILURE_RESOURCES, /* flush_result = */ false); |
e537352b LP |
1222 | } |
1223 | ||
850b7410 LP |
1224 | static void mount_set_reload_result(Mount *m, MountResult result) { |
1225 | assert(m); | |
1226 | ||
1227 | /* Only store the first error we encounter */ | |
1228 | if (m->reload_result != MOUNT_SUCCESS) | |
1229 | return; | |
1230 | ||
1231 | m->reload_result = result; | |
1232 | } | |
1233 | ||
9d2f5178 | 1234 | static void mount_enter_remounting(Mount *m) { |
b294b79f | 1235 | MountParameters *p; |
e9fa1bf7 | 1236 | int r; |
e537352b LP |
1237 | |
1238 | assert(m); | |
1239 | ||
850b7410 LP |
1240 | /* Reset reload result when we are about to start a new remount operation */ |
1241 | m->reload_result = MOUNT_SUCCESS; | |
1242 | ||
a16e1123 LP |
1243 | m->control_command_id = MOUNT_EXEC_REMOUNT; |
1244 | m->control_command = m->exec_command + MOUNT_EXEC_REMOUNT; | |
e537352b | 1245 | |
b294b79f MO |
1246 | p = get_mount_parameters_fragment(m); |
1247 | if (p) { | |
e537352b LP |
1248 | const char *o; |
1249 | ||
b294b79f MO |
1250 | if (p->options) |
1251 | o = strjoina("remount,", p->options); | |
718db961 | 1252 | else |
e537352b LP |
1253 | o = "remount"; |
1254 | ||
f00929ad | 1255 | r = exec_command_set(m->control_command, MOUNT_PATH, |
b294b79f | 1256 | p->what, m->where, |
e86b3761 | 1257 | "-o", o, NULL); |
e86b3761 ZJS |
1258 | if (r >= 0 && m->sloppy_options) |
1259 | r = exec_command_append(m->control_command, "-s", NULL); | |
c600357b MH |
1260 | if (r >= 0 && m->read_write_only) |
1261 | r = exec_command_append(m->control_command, "-w", NULL); | |
b294b79f MO |
1262 | if (r >= 0 && p->fstype) |
1263 | r = exec_command_append(m->control_command, "-t", p->fstype, NULL); | |
d30eb0b5 LP |
1264 | if (r < 0) { |
1265 | log_unit_warning_errno(UNIT(m), r, "Failed to prepare remount command line: %m"); | |
1266 | goto fail; | |
1267 | } | |
1268 | ||
1269 | } else { | |
1270 | r = log_unit_warning_errno(UNIT(m), SYNTHETIC_ERRNO(ENOENT), "No mount parameters to operate on."); | |
e537352b | 1271 | goto fail; |
d30eb0b5 | 1272 | } |
e537352b | 1273 | |
a16e1123 | 1274 | mount_unwatch_control_pid(m); |
5e94833f | 1275 | |
718db961 | 1276 | r = mount_spawn(m, m->control_command, &m->control_pid); |
d30eb0b5 LP |
1277 | if (r < 0) { |
1278 | log_unit_warning_errno(UNIT(m), r, "Failed to spawn 'remount' task: %m"); | |
e537352b | 1279 | goto fail; |
d30eb0b5 | 1280 | } |
e537352b LP |
1281 | |
1282 | mount_set_state(m, MOUNT_REMOUNTING); | |
e537352b LP |
1283 | return; |
1284 | ||
1285 | fail: | |
850b7410 | 1286 | mount_set_reload_result(m, MOUNT_FAILURE_RESOURCES); |
e3783068 | 1287 | mount_enter_dead_or_mounted(m, MOUNT_SUCCESS, /* flush_result = */ false); |
e537352b LP |
1288 | } |
1289 | ||
7eba1463 LP |
1290 | static void mount_cycle_clear(Mount *m) { |
1291 | assert(m); | |
1292 | ||
1293 | /* Clear all state we shall forget for this new cycle */ | |
1294 | ||
1295 | m->result = MOUNT_SUCCESS; | |
1296 | m->reload_result = MOUNT_SUCCESS; | |
1297 | exec_command_reset_status_array(m->exec_command, _MOUNT_EXEC_COMMAND_MAX); | |
9cc54544 LP |
1298 | |
1299 | if (m->cgroup_runtime) | |
1300 | m->cgroup_runtime->reset_accounting = true; | |
7eba1463 LP |
1301 | } |
1302 | ||
e537352b | 1303 | static int mount_start(Unit *u) { |
e9fa1bf7 | 1304 | Mount *m = ASSERT_PTR(MOUNT(u)); |
07299350 | 1305 | int r; |
e537352b | 1306 | |
e537352b LP |
1307 | /* We cannot fulfill this request right now, try again later |
1308 | * please! */ | |
f2aed307 LP |
1309 | if (IN_SET(m->state, |
1310 | MOUNT_UNMOUNTING, | |
1311 | MOUNT_UNMOUNTING_SIGTERM, | |
17e9d53d YW |
1312 | MOUNT_UNMOUNTING_SIGKILL, |
1313 | MOUNT_CLEANING)) | |
e537352b LP |
1314 | return -EAGAIN; |
1315 | ||
1316 | /* Already on it! */ | |
db39a627 | 1317 | if (IN_SET(m->state, MOUNT_MOUNTING, MOUNT_MOUNTING_DONE)) |
e537352b LP |
1318 | return 0; |
1319 | ||
f2aed307 | 1320 | assert(IN_SET(m->state, MOUNT_DEAD, MOUNT_FAILED)); |
e537352b | 1321 | |
4b58153d LP |
1322 | r = unit_acquire_invocation_id(u); |
1323 | if (r < 0) | |
1324 | return r; | |
1325 | ||
7eba1463 | 1326 | mount_cycle_clear(m); |
8d567588 | 1327 | mount_enter_mounting(m); |
7eba1463 | 1328 | |
82a2b6bb | 1329 | return 1; |
e537352b LP |
1330 | } |
1331 | ||
1332 | static int mount_stop(Unit *u) { | |
e9fa1bf7 | 1333 | Mount *m = ASSERT_PTR(MOUNT(u)); |
e537352b | 1334 | |
1e122561 YW |
1335 | /* When we directly call umount() for a path, then the state of the corresponding mount unit may be |
1336 | * outdated. Let's re-read mountinfo now and update the state. */ | |
1337 | if (m->invalidated_state) | |
1338 | (void) mount_process_proc_self_mountinfo(u->manager); | |
1339 | ||
22af0e58 LP |
1340 | switch (m->state) { |
1341 | ||
1342 | case MOUNT_UNMOUNTING: | |
1343 | case MOUNT_UNMOUNTING_SIGKILL: | |
1344 | case MOUNT_UNMOUNTING_SIGTERM: | |
1345 | /* Already on it */ | |
e537352b LP |
1346 | return 0; |
1347 | ||
22af0e58 LP |
1348 | case MOUNT_MOUNTING: |
1349 | case MOUNT_MOUNTING_DONE: | |
1350 | case MOUNT_REMOUNTING: | |
1351 | /* If we are still waiting for /bin/mount, we go directly into kill mode. */ | |
1352 | mount_enter_signal(m, MOUNT_UNMOUNTING_SIGTERM, MOUNT_SUCCESS); | |
1353 | return 0; | |
e537352b | 1354 | |
22af0e58 LP |
1355 | case MOUNT_REMOUNTING_SIGTERM: |
1356 | /* If we are already waiting for a hung remount, convert this to the matching unmounting state */ | |
1357 | mount_set_state(m, MOUNT_UNMOUNTING_SIGTERM); | |
1358 | return 0; | |
1359 | ||
1360 | case MOUNT_REMOUNTING_SIGKILL: | |
1361 | /* as above */ | |
1362 | mount_set_state(m, MOUNT_UNMOUNTING_SIGKILL); | |
1363 | return 0; | |
1364 | ||
1365 | case MOUNT_MOUNTED: | |
1366 | mount_enter_unmounting(m); | |
1367 | return 1; | |
1368 | ||
17e9d53d YW |
1369 | case MOUNT_CLEANING: |
1370 | /* If we are currently cleaning, then abort it, brutally. */ | |
1371 | mount_enter_signal(m, MOUNT_UNMOUNTING_SIGKILL, MOUNT_SUCCESS); | |
1372 | return 0; | |
1373 | ||
1e122561 YW |
1374 | case MOUNT_DEAD: |
1375 | case MOUNT_FAILED: | |
1376 | /* The mount has just been unmounted by somebody else. */ | |
1377 | return 0; | |
1378 | ||
22af0e58 | 1379 | default: |
04499a70 | 1380 | assert_not_reached(); |
22af0e58 | 1381 | } |
e537352b LP |
1382 | } |
1383 | ||
1384 | static int mount_reload(Unit *u) { | |
e9fa1bf7 | 1385 | Mount *m = ASSERT_PTR(MOUNT(u)); |
e537352b | 1386 | |
e537352b LP |
1387 | assert(m->state == MOUNT_MOUNTED); |
1388 | ||
9d2f5178 | 1389 | mount_enter_remounting(m); |
22af0e58 | 1390 | |
2d018ae2 | 1391 | return 1; |
e537352b LP |
1392 | } |
1393 | ||
a16e1123 | 1394 | static int mount_serialize(Unit *u, FILE *f, FDSet *fds) { |
e9fa1bf7 | 1395 | Mount *m = ASSERT_PTR(MOUNT(u)); |
a16e1123 | 1396 | |
a16e1123 LP |
1397 | assert(f); |
1398 | assert(fds); | |
1399 | ||
d68c645b LP |
1400 | (void) serialize_item(f, "state", mount_state_to_string(m->state)); |
1401 | (void) serialize_item(f, "result", mount_result_to_string(m->result)); | |
1402 | (void) serialize_item(f, "reload-result", mount_result_to_string(m->reload_result)); | |
2c09fb81 | 1403 | (void) serialize_item_format(f, "n-retry-umount", "%u", m->n_retry_umount); |
2a7451dc | 1404 | (void) serialize_pidref(f, fds, "control-pid", &m->control_pid); |
a16e1123 LP |
1405 | |
1406 | if (m->control_command_id >= 0) | |
d68c645b | 1407 | (void) serialize_item(f, "control-command", mount_exec_command_to_string(m->control_command_id)); |
a16e1123 LP |
1408 | |
1409 | return 0; | |
1410 | } | |
1411 | ||
1412 | static int mount_deserialize_item(Unit *u, const char *key, const char *value, FDSet *fds) { | |
e9fa1bf7 | 1413 | Mount *m = ASSERT_PTR(MOUNT(u)); |
2c09fb81 | 1414 | int r; |
a16e1123 | 1415 | |
a16e1123 LP |
1416 | assert(key); |
1417 | assert(value); | |
1418 | assert(fds); | |
1419 | ||
1420 | if (streq(key, "state")) { | |
1421 | MountState state; | |
1422 | ||
7fb1d980 YW |
1423 | state = mount_state_from_string(value); |
1424 | if (state < 0) | |
1425 | log_unit_debug_errno(u, state, "Failed to parse state value: %s", value); | |
a16e1123 LP |
1426 | else |
1427 | m->deserialized_state = state; | |
2c09fb81 | 1428 | |
9d2f5178 LP |
1429 | } else if (streq(key, "result")) { |
1430 | MountResult f; | |
a16e1123 | 1431 | |
9d2f5178 LP |
1432 | f = mount_result_from_string(value); |
1433 | if (f < 0) | |
7fb1d980 | 1434 | log_unit_debug_errno(u, f, "Failed to parse result value: %s", value); |
9d2f5178 LP |
1435 | else if (f != MOUNT_SUCCESS) |
1436 | m->result = f; | |
1437 | ||
1438 | } else if (streq(key, "reload-result")) { | |
1439 | MountResult f; | |
1440 | ||
1441 | f = mount_result_from_string(value); | |
1442 | if (f < 0) | |
7fb1d980 | 1443 | log_unit_debug_errno(u, f, "Failed to parse reload result value: %s", value); |
9d2f5178 LP |
1444 | else if (f != MOUNT_SUCCESS) |
1445 | m->reload_result = f; | |
a16e1123 | 1446 | |
2c09fb81 LP |
1447 | } else if (streq(key, "n-retry-umount")) { |
1448 | ||
1449 | r = safe_atou(value, &m->n_retry_umount); | |
1450 | if (r < 0) | |
7fb1d980 | 1451 | log_unit_debug_errno(u, r, "Failed to parse n-retry-umount value: %s", value); |
2c09fb81 | 1452 | |
a16e1123 | 1453 | } else if (streq(key, "control-pid")) { |
a16e1123 | 1454 | |
aaa872a7 DDM |
1455 | if (!pidref_is_set(&m->control_pid)) |
1456 | (void) deserialize_pidref(fds, value, &m->control_pid); | |
3f459cd9 | 1457 | |
a16e1123 LP |
1458 | } else if (streq(key, "control-command")) { |
1459 | MountExecCommand id; | |
1460 | ||
f2341e0a LP |
1461 | id = mount_exec_command_from_string(value); |
1462 | if (id < 0) | |
7fb1d980 | 1463 | log_unit_debug_errno(u, id, "Failed to parse exec-command value: %s", value); |
a16e1123 LP |
1464 | else { |
1465 | m->control_command_id = id; | |
1466 | m->control_command = m->exec_command + id; | |
1467 | } | |
a16e1123 | 1468 | } else |
f2341e0a | 1469 | log_unit_debug(u, "Unknown serialization key: %s", key); |
a16e1123 LP |
1470 | |
1471 | return 0; | |
1472 | } | |
1473 | ||
d1e8e8b5 | 1474 | static UnitActiveState mount_active_state(Unit *u) { |
e9fa1bf7 | 1475 | Mount *m = ASSERT_PTR(MOUNT(u)); |
e537352b | 1476 | |
e9fa1bf7 | 1477 | return state_translation_table[m->state]; |
e537352b LP |
1478 | } |
1479 | ||
d1e8e8b5 | 1480 | static const char *mount_sub_state_to_string(Unit *u) { |
e9fa1bf7 | 1481 | Mount *m = ASSERT_PTR(MOUNT(u)); |
10a94420 | 1482 | |
e9fa1bf7 | 1483 | return mount_state_to_string(m->state); |
10a94420 LP |
1484 | } |
1485 | ||
d1e8e8b5 | 1486 | static bool mount_may_gc(Unit *u) { |
e9fa1bf7 | 1487 | Mount *m = ASSERT_PTR(MOUNT(u)); |
701cc384 | 1488 | |
f2f725e5 ZJS |
1489 | if (m->from_proc_self_mountinfo) |
1490 | return false; | |
1491 | ||
1492 | return true; | |
701cc384 LP |
1493 | } |
1494 | ||
e537352b | 1495 | static void mount_sigchld_event(Unit *u, pid_t pid, int code, int status) { |
e9fa1bf7 | 1496 | Mount *m = ASSERT_PTR(MOUNT(u)); |
9d2f5178 | 1497 | MountResult f; |
e537352b | 1498 | |
e537352b LP |
1499 | assert(pid >= 0); |
1500 | ||
360f384f | 1501 | if (pid != m->control_pid.pid) |
8c47c732 | 1502 | return; |
e537352b | 1503 | |
35080486 LP |
1504 | /* So here's the thing, we really want to know before /usr/bin/mount or /usr/bin/umount exit whether |
1505 | * they established/remove a mount. This is important when mounting, but even more so when unmounting | |
1506 | * since we need to deal with nested mounts and otherwise cannot safely determine whether to repeat | |
1507 | * the unmounts. In theory, the kernel fires /proc/self/mountinfo changes off before returning from | |
1508 | * the mount() or umount() syscalls, and thus we should see the changes to the proc file before we | |
1509 | * process the waitid() for the /usr/bin/(u)mount processes. However, this is unfortunately racy: we | |
1510 | * have to waitid() for processes using P_ALL (since we need to reap unexpected children that got | |
1511 | * reparented to PID 1), but when using P_ALL we might end up reaping processes that terminated just | |
1512 | * instants ago, i.e. already after our last event loop iteration (i.e. after the last point we might | |
1513 | * have noticed /proc/self/mountinfo events via epoll). This means event loop priorities for | |
1514 | * processing SIGCHLD vs. /proc/self/mountinfo IO events are not as relevant as we want. To fix that | |
1515 | * race, let's explicitly scan /proc/self/mountinfo before we start processing /usr/bin/(u)mount | |
1516 | * dying. It's ugly, but it makes our ordering systematic again, and makes sure we always see | |
1517 | * /proc/self/mountinfo changes before our mount/umount exits. */ | |
1518 | (void) mount_process_proc_self_mountinfo(u->manager); | |
1519 | ||
360f384f | 1520 | pidref_done(&m->control_pid); |
e537352b | 1521 | |
1f0958f6 | 1522 | if (is_clean_exit(code, status, EXIT_CLEAN_COMMAND, NULL)) |
9d2f5178 LP |
1523 | f = MOUNT_SUCCESS; |
1524 | else if (code == CLD_EXITED) | |
1525 | f = MOUNT_FAILURE_EXIT_CODE; | |
1526 | else if (code == CLD_KILLED) | |
1527 | f = MOUNT_FAILURE_SIGNAL; | |
1528 | else if (code == CLD_DUMPED) | |
1529 | f = MOUNT_FAILURE_CORE_DUMP; | |
1530 | else | |
04499a70 | 1531 | assert_not_reached(); |
9d2f5178 | 1532 | |
850b7410 LP |
1533 | if (IN_SET(m->state, MOUNT_REMOUNTING, MOUNT_REMOUNTING_SIGKILL, MOUNT_REMOUNTING_SIGTERM)) |
1534 | mount_set_reload_result(m, f); | |
8e94bb62 MY |
1535 | else if (m->result == MOUNT_SUCCESS && !IN_SET(m->state, MOUNT_MOUNTING, MOUNT_UNMOUNTING)) |
1536 | /* MOUNT_MOUNTING and MOUNT_UNMOUNTING states need to be patched, see below. */ | |
9d2f5178 | 1537 | m->result = f; |
8c47c732 | 1538 | |
a16e1123 | 1539 | if (m->control_command) { |
6ea832a2 | 1540 | exec_status_exit(&m->control_command->exec_status, &m->exec_context, pid, code, status); |
9d2f5178 | 1541 | |
a16e1123 LP |
1542 | m->control_command = NULL; |
1543 | m->control_command_id = _MOUNT_EXEC_COMMAND_INVALID; | |
1544 | } | |
1545 | ||
91bbd9b7 | 1546 | unit_log_process_exit( |
5cc2cd1c | 1547 | u, |
91bbd9b7 LP |
1548 | "Mount process", |
1549 | mount_exec_command_to_string(m->control_command_id), | |
5cc2cd1c | 1550 | f == MOUNT_SUCCESS, |
91bbd9b7 | 1551 | code, status); |
e537352b | 1552 | |
006aabbd AJ |
1553 | /* Note that due to the io event priority logic, we can be sure the new mountinfo is loaded |
1554 | * before we process the SIGCHLD for the mount command. */ | |
e537352b LP |
1555 | |
1556 | switch (m->state) { | |
1557 | ||
1558 | case MOUNT_MOUNTING: | |
8e94bb62 | 1559 | /* Our mount point has not appeared in mountinfo. Something went wrong. */ |
e537352b | 1560 | |
006aabbd | 1561 | if (f == MOUNT_SUCCESS) { |
8e94bb62 MY |
1562 | /* Either /bin/mount has an unexpected definition of success, or someone raced us |
1563 | * and we lost. */ | |
006aabbd AJ |
1564 | log_unit_warning(UNIT(m), "Mount process finished, but there is no mount."); |
1565 | f = MOUNT_FAILURE_PROTOCOL; | |
1566 | } | |
e3783068 | 1567 | mount_enter_dead(m, f, /* flush_result = */ false); |
006aabbd AJ |
1568 | break; |
1569 | ||
1570 | case MOUNT_MOUNTING_DONE: | |
1571 | mount_enter_mounted(m, f); | |
e537352b LP |
1572 | break; |
1573 | ||
e2f3b44c | 1574 | case MOUNT_REMOUNTING: |
e2f3b44c | 1575 | case MOUNT_REMOUNTING_SIGTERM: |
22af0e58 | 1576 | case MOUNT_REMOUNTING_SIGKILL: |
e3783068 | 1577 | mount_enter_dead_or_mounted(m, MOUNT_SUCCESS, /* flush_result = */ false); |
e2f3b44c LP |
1578 | break; |
1579 | ||
e537352b | 1580 | case MOUNT_UNMOUNTING: |
3cc96856 | 1581 | if (f == MOUNT_SUCCESS && m->from_proc_self_mountinfo) { |
22af0e58 | 1582 | /* Still a mount point? If so, let's try again. Most likely there were multiple mount points |
57018361 AJ |
1583 | * stacked on top of each other. We might exceed the timeout specified by the user overall, |
1584 | * but we will stop as soon as any one umount times out. */ | |
22af0e58 LP |
1585 | |
1586 | if (m->n_retry_umount < RETRY_UMOUNT_MAX) { | |
1587 | log_unit_debug(u, "Mount still present, trying again."); | |
1588 | m->n_retry_umount++; | |
1589 | mount_enter_unmounting(m); | |
1590 | } else { | |
006aabbd | 1591 | log_unit_warning(u, "Mount still present after %u attempts to unmount, giving up.", m->n_retry_umount); |
9c7c3d9c | 1592 | mount_enter_mounted(m, MOUNT_FAILURE_PROTOCOL); |
22af0e58 | 1593 | } |
8e94bb62 MY |
1594 | } else if (f == MOUNT_FAILURE_EXIT_CODE && !m->from_proc_self_mountinfo) { |
1595 | /* Hmm, umount process spawned by us failed, but the mount disappeared anyway? | |
1596 | * Maybe someone else is trying to unmount at the same time. */ | |
1597 | log_unit_notice(u, "Mount disappeared even though umount process failed, continuing."); | |
e3783068 | 1598 | mount_enter_dead(m, MOUNT_SUCCESS, /* flush_result = */ true); |
22af0e58 | 1599 | } else |
e3783068 MY |
1600 | /* At this point, either the unmount succeeded or unexpected error occurred. We usually |
1601 | * remember the first error in 'result', but here let's update that forcibly, since | |
1602 | * there could previous failed attempts yet we only care about the most recent | |
1603 | * attempt. IOW, if we eventually managed to unmount the stuff, don't enter failed | |
1604 | * end state. */ | |
1605 | mount_enter_dead_or_mounted(m, f, /* flush_result = */ true); | |
22af0e58 | 1606 | |
e537352b | 1607 | break; |
57018361 | 1608 | |
57018361 | 1609 | case MOUNT_UNMOUNTING_SIGTERM: |
8e94bb62 | 1610 | case MOUNT_UNMOUNTING_SIGKILL: |
e3783068 | 1611 | mount_enter_dead_or_mounted(m, f, /* flush_result = */ false); |
57018361 | 1612 | break; |
e537352b | 1613 | |
17e9d53d YW |
1614 | case MOUNT_CLEANING: |
1615 | if (m->clean_result == MOUNT_SUCCESS) | |
1616 | m->clean_result = f; | |
1617 | ||
e3783068 | 1618 | mount_enter_dead(m, MOUNT_SUCCESS, /* flush_result = */ false); |
17e9d53d YW |
1619 | break; |
1620 | ||
e537352b | 1621 | default: |
04499a70 | 1622 | assert_not_reached(); |
e537352b | 1623 | } |
c4e2ceae LP |
1624 | |
1625 | /* Notify clients about changed exit status */ | |
1626 | unit_add_to_dbus_queue(u); | |
e537352b LP |
1627 | } |
1628 | ||
718db961 | 1629 | static int mount_dispatch_timer(sd_event_source *source, usec_t usec, void *userdata) { |
e9fa1bf7 | 1630 | Mount *m = ASSERT_PTR(MOUNT(userdata)); |
e537352b | 1631 | |
718db961 | 1632 | assert(m->timer_event_source == source); |
e537352b LP |
1633 | |
1634 | switch (m->state) { | |
1635 | ||
1636 | case MOUNT_MOUNTING: | |
1637 | case MOUNT_MOUNTING_DONE: | |
22af0e58 LP |
1638 | log_unit_warning(UNIT(m), "Mounting timed out. Terminating."); |
1639 | mount_enter_signal(m, MOUNT_UNMOUNTING_SIGTERM, MOUNT_FAILURE_TIMEOUT); | |
e537352b LP |
1640 | break; |
1641 | ||
1642 | case MOUNT_REMOUNTING: | |
79aafbd1 | 1643 | log_unit_warning(UNIT(m), "Remounting timed out. Terminating remount process."); |
22af0e58 LP |
1644 | mount_set_reload_result(m, MOUNT_FAILURE_TIMEOUT); |
1645 | mount_enter_signal(m, MOUNT_REMOUNTING_SIGTERM, MOUNT_SUCCESS); | |
e537352b LP |
1646 | break; |
1647 | ||
22af0e58 LP |
1648 | case MOUNT_REMOUNTING_SIGTERM: |
1649 | mount_set_reload_result(m, MOUNT_FAILURE_TIMEOUT); | |
e537352b | 1650 | |
4819ff03 | 1651 | if (m->kill_context.send_sigkill) { |
22af0e58 LP |
1652 | log_unit_warning(UNIT(m), "Remounting timed out. Killing."); |
1653 | mount_enter_signal(m, MOUNT_REMOUNTING_SIGKILL, MOUNT_SUCCESS); | |
ba035df2 | 1654 | } else { |
22af0e58 | 1655 | log_unit_warning(UNIT(m), "Remounting timed out. Skipping SIGKILL. Ignoring."); |
e3783068 | 1656 | mount_enter_dead_or_mounted(m, MOUNT_SUCCESS, /* flush_result = */ false); |
ba035df2 | 1657 | } |
e537352b LP |
1658 | break; |
1659 | ||
22af0e58 LP |
1660 | case MOUNT_REMOUNTING_SIGKILL: |
1661 | mount_set_reload_result(m, MOUNT_FAILURE_TIMEOUT); | |
ba035df2 | 1662 | |
22af0e58 | 1663 | log_unit_warning(UNIT(m), "Mount process still around after SIGKILL. Ignoring."); |
e3783068 | 1664 | mount_enter_dead_or_mounted(m, MOUNT_SUCCESS, /* flush_result = */ false); |
22af0e58 LP |
1665 | break; |
1666 | ||
1667 | case MOUNT_UNMOUNTING: | |
79aafbd1 | 1668 | log_unit_warning(UNIT(m), "Unmounting timed out. Terminating."); |
22af0e58 | 1669 | mount_enter_signal(m, MOUNT_UNMOUNTING_SIGTERM, MOUNT_FAILURE_TIMEOUT); |
e537352b LP |
1670 | break; |
1671 | ||
1672 | case MOUNT_UNMOUNTING_SIGTERM: | |
4819ff03 | 1673 | if (m->kill_context.send_sigkill) { |
22af0e58 | 1674 | log_unit_warning(UNIT(m), "Mount process timed out. Killing."); |
9d2f5178 | 1675 | mount_enter_signal(m, MOUNT_UNMOUNTING_SIGKILL, MOUNT_FAILURE_TIMEOUT); |
ba035df2 | 1676 | } else { |
22af0e58 | 1677 | log_unit_warning(UNIT(m), "Mount process timed out. Skipping SIGKILL. Ignoring."); |
e3783068 | 1678 | mount_enter_dead_or_mounted(m, MOUNT_FAILURE_TIMEOUT, /* flush_result = */ false); |
ba035df2 | 1679 | } |
e537352b LP |
1680 | break; |
1681 | ||
e537352b | 1682 | case MOUNT_UNMOUNTING_SIGKILL: |
22af0e58 | 1683 | log_unit_warning(UNIT(m), "Mount process still around after SIGKILL. Ignoring."); |
e3783068 | 1684 | mount_enter_dead_or_mounted(m, MOUNT_FAILURE_TIMEOUT, /* flush_result = */ false); |
e537352b LP |
1685 | break; |
1686 | ||
17e9d53d YW |
1687 | case MOUNT_CLEANING: |
1688 | log_unit_warning(UNIT(m), "Cleaning timed out. killing."); | |
1689 | ||
1690 | if (m->clean_result == MOUNT_SUCCESS) | |
1691 | m->clean_result = MOUNT_FAILURE_TIMEOUT; | |
1692 | ||
1693 | mount_enter_signal(m, MOUNT_UNMOUNTING_SIGKILL, 0); | |
1694 | break; | |
1695 | ||
e537352b | 1696 | default: |
04499a70 | 1697 | assert_not_reached(); |
e537352b | 1698 | } |
718db961 LP |
1699 | |
1700 | return 0; | |
e537352b LP |
1701 | } |
1702 | ||
03b8cfed | 1703 | static int mount_setup_new_unit( |
839ee058 LP |
1704 | Manager *m, |
1705 | const char *name, | |
03b8cfed FB |
1706 | const char *what, |
1707 | const char *where, | |
1708 | const char *options, | |
1709 | const char *fstype, | |
ec88d1ea | 1710 | MountProcFlags *ret_flags, |
839ee058 | 1711 | Unit **ret) { |
03b8cfed | 1712 | |
839ee058 | 1713 | _cleanup_(unit_freep) Unit *u = NULL; |
f1dfc20a | 1714 | Mount *mnt; |
bbee24bc | 1715 | int r; |
03b8cfed | 1716 | |
839ee058 LP |
1717 | assert(m); |
1718 | assert(name); | |
ec88d1ea | 1719 | assert(ret_flags); |
839ee058 LP |
1720 | assert(ret); |
1721 | ||
1722 | r = unit_new_for_name(m, sizeof(Mount), name, &u); | |
1723 | if (r < 0) | |
1724 | return r; | |
03b8cfed | 1725 | |
f1dfc20a MY |
1726 | mnt = ASSERT_PTR(MOUNT(u)); |
1727 | ||
e10fe042 LP |
1728 | r = free_and_strdup(&u->source_path, "/proc/self/mountinfo"); |
1729 | if (r < 0) | |
1730 | return r; | |
03b8cfed | 1731 | |
f1dfc20a | 1732 | r = free_and_strdup(&mnt->where, where); |
e10fe042 LP |
1733 | if (r < 0) |
1734 | return r; | |
03b8cfed | 1735 | |
f1dfc20a | 1736 | r = update_parameters_proc_self_mountinfo(mnt, what, options, fstype); |
bbee24bc LP |
1737 | if (r < 0) |
1738 | return r; | |
03b8cfed | 1739 | |
09f4d843 ZJS |
1740 | /* This unit was generated because /proc/self/mountinfo reported it. Remember this, so that by the |
1741 | * time we load the unit file for it (and thus add in extra deps right after) we know what source to | |
1742 | * attributes the deps to. */ | |
f1dfc20a | 1743 | mnt->from_proc_self_mountinfo = true; |
6d7e89b0 | 1744 | |
f1dfc20a | 1745 | r = mount_add_non_exec_dependencies(mnt); |
b9e6d23d YW |
1746 | if (r < 0) |
1747 | return r; | |
1748 | ||
09f4d843 ZJS |
1749 | /* We have only allocated the stub now, let's enqueue this unit for loading now, so that everything |
1750 | * else is loaded in now. */ | |
cfcd4318 | 1751 | unit_add_to_load_queue(u); |
26e35b16 | 1752 | |
ec88d1ea | 1753 | *ret_flags = MOUNT_PROC_IS_MOUNTED | MOUNT_PROC_JUST_MOUNTED | MOUNT_PROC_JUST_CHANGED; |
839ee058 | 1754 | *ret = TAKE_PTR(u); |
03b8cfed FB |
1755 | return 0; |
1756 | } | |
1757 | ||
1758 | static int mount_setup_existing_unit( | |
1759 | Unit *u, | |
1760 | const char *what, | |
1761 | const char *where, | |
1762 | const char *options, | |
1763 | const char *fstype, | |
ec88d1ea | 1764 | MountProcFlags *ret_flags) { |
03b8cfed | 1765 | |
e9fa1bf7 | 1766 | Mount *m = ASSERT_PTR(MOUNT(u)); |
bbee24bc | 1767 | int r; |
03b8cfed FB |
1768 | |
1769 | assert(u); | |
f1dfc20a | 1770 | assert(where); |
4bb68f2f | 1771 | assert(ret_flags); |
03b8cfed | 1772 | |
e9fa1bf7 MY |
1773 | if (!m->where) { |
1774 | m->where = strdup(where); | |
1775 | if (!m->where) | |
03b8cfed FB |
1776 | return -ENOMEM; |
1777 | } | |
1778 | ||
4bb68f2f LP |
1779 | /* In case we have multiple mounts established on the same mount point, let's merge flags set already |
1780 | * for the current unit. Note that the flags field is reset on each iteration of reading | |
1781 | * /proc/self/mountinfo, hence we know for sure anything already set here is from the current | |
1782 | * iteration and thus worthy of taking into account. */ | |
e9fa1bf7 | 1783 | MountProcFlags flags = m->proc_flags | MOUNT_PROC_IS_MOUNTED; |
4bb68f2f | 1784 | |
e9fa1bf7 | 1785 | r = update_parameters_proc_self_mountinfo(m, what, options, fstype); |
bbee24bc LP |
1786 | if (r < 0) |
1787 | return r; | |
ec88d1ea LP |
1788 | if (r > 0) |
1789 | flags |= MOUNT_PROC_JUST_CHANGED; | |
03b8cfed | 1790 | |
4bb68f2f LP |
1791 | /* There are two conditions when we consider a mount point just mounted: when we haven't seen it in |
1792 | * /proc/self/mountinfo before or when MOUNT_MOUNTING is our current state. Why bother with the | |
1793 | * latter? Shouldn't that be covered by the former? No, during reload it is not because we might then | |
1794 | * encounter a new /proc/self/mountinfo in combination with an old mount unit state (since it stems | |
1795 | * from the serialized state), and need to catch up. Since we know that the MOUNT_MOUNTING state is | |
1796 | * reached when we wait for the mount to appear we hence can assume that if we are in it, we are | |
1797 | * actually seeing it established for the first time. */ | |
e9fa1bf7 | 1798 | if (!m->from_proc_self_mountinfo || m->state == MOUNT_MOUNTING) |
ec88d1ea | 1799 | flags |= MOUNT_PROC_JUST_MOUNTED; |
d253a45e | 1800 | |
e9fa1bf7 | 1801 | m->from_proc_self_mountinfo = true; |
03b8cfed | 1802 | |
dc4c5871 | 1803 | if (UNIT_IS_LOAD_ERROR(u->load_state)) { |
f8064c4f LP |
1804 | /* The unit was previously not found or otherwise not loaded. Now that the unit shows up in |
1805 | * /proc/self/mountinfo we should reconsider it this, hence set it to UNIT_LOADED. */ | |
03b8cfed FB |
1806 | u->load_state = UNIT_LOADED; |
1807 | u->load_error = 0; | |
1808 | ||
ec88d1ea | 1809 | flags |= MOUNT_PROC_JUST_CHANGED; |
03b8cfed FB |
1810 | } |
1811 | ||
ec88d1ea | 1812 | if (FLAGS_SET(flags, MOUNT_PROC_JUST_CHANGED)) { |
a3742204 LP |
1813 | /* If things changed, then make sure that all deps are regenerated. Let's |
1814 | * first remove all automatic deps, and then add in the new ones. */ | |
e9fa1bf7 | 1815 | r = mount_add_non_exec_dependencies(m); |
a3742204 LP |
1816 | if (r < 0) |
1817 | return r; | |
1818 | } | |
03b8cfed | 1819 | |
ec88d1ea | 1820 | *ret_flags = flags; |
03b8cfed FB |
1821 | return 0; |
1822 | } | |
1823 | ||
628c89cc | 1824 | static int mount_setup_unit( |
e537352b LP |
1825 | Manager *m, |
1826 | const char *what, | |
1827 | const char *where, | |
1828 | const char *options, | |
1829 | const char *fstype, | |
e537352b | 1830 | bool set_flags) { |
057d9ab8 | 1831 | |
03b8cfed | 1832 | _cleanup_free_ char *e = NULL; |
ec88d1ea | 1833 | MountProcFlags flags; |
057d9ab8 LP |
1834 | Unit *u; |
1835 | int r; | |
b08d03ff | 1836 | |
f50e0a01 | 1837 | assert(m); |
b08d03ff LP |
1838 | assert(what); |
1839 | assert(where); | |
e537352b LP |
1840 | assert(options); |
1841 | assert(fstype); | |
1842 | ||
e537352b LP |
1843 | /* Ignore API mount points. They should never be referenced in |
1844 | * dependencies ever. */ | |
33ff02c9 | 1845 | if (mount_point_is_api(where) || mount_point_ignore(where)) |
57f2a956 | 1846 | return 0; |
b08d03ff | 1847 | |
8d567588 LP |
1848 | if (streq(fstype, "autofs")) |
1849 | return 0; | |
1850 | ||
4e85aff4 LP |
1851 | /* probably some kind of swap, ignore */ |
1852 | if (!is_path(where)) | |
b08d03ff LP |
1853 | return 0; |
1854 | ||
7410616c | 1855 | r = unit_name_from_path(where, ".mount", &e); |
03e52e8c | 1856 | if (r < 0) |
2c905207 | 1857 | return log_struct_errno( |
03e52e8c | 1858 | LOG_WARNING, r, |
2c905207 LP |
1859 | "MESSAGE_ID=" SD_MESSAGE_MOUNT_POINT_PATH_NOT_SUITABLE_STR, |
1860 | "MOUNT_POINT=%s", where, | |
03e52e8c YW |
1861 | LOG_MESSAGE("Failed to generate valid unit name from mount point path '%s', ignoring mount point: %m", |
1862 | where)); | |
b08d03ff | 1863 | |
7d17cfbc | 1864 | u = manager_get_unit(m, e); |
839ee058 | 1865 | if (u) |
03b8cfed | 1866 | r = mount_setup_existing_unit(u, what, where, options, fstype, &flags); |
839ee058 | 1867 | else |
09f4d843 ZJS |
1868 | /* First time we see this mount point meaning that it's not been initiated by a mount unit |
1869 | * but rather by the sysadmin having called mount(8) directly. */ | |
839ee058 | 1870 | r = mount_setup_new_unit(m, e, what, where, options, fstype, &flags, &u); |
03b8cfed | 1871 | if (r < 0) |
2c905207 | 1872 | return log_warning_errno(r, "Failed to set up mount unit for '%s': %m", where); |
ff5f34d0 | 1873 | |
ec88d1ea LP |
1874 | /* If the mount changed properties or state, let's notify our clients */ |
1875 | if (flags & (MOUNT_PROC_JUST_CHANGED|MOUNT_PROC_JUST_MOUNTED)) | |
ff5f34d0 | 1876 | unit_add_to_dbus_queue(u); |
c1e1601e | 1877 | |
ec88d1ea LP |
1878 | if (set_flags) |
1879 | MOUNT(u)->proc_flags = flags; | |
1880 | ||
b08d03ff | 1881 | return 0; |
b08d03ff LP |
1882 | } |
1883 | ||
ef734fd6 | 1884 | static int mount_load_proc_self_mountinfo(Manager *m, bool set_flags) { |
13dcfe46 ZJS |
1885 | _cleanup_(mnt_free_tablep) struct libmnt_table *table = NULL; |
1886 | _cleanup_(mnt_free_iterp) struct libmnt_iter *iter = NULL; | |
ba0d56f5 | 1887 | int r; |
b08d03ff LP |
1888 | |
1889 | assert(m); | |
1890 | ||
e2857b3d | 1891 | r = libmount_parse(NULL, NULL, &table, &iter); |
5cca8def | 1892 | if (r < 0) |
628c89cc | 1893 | return log_error_errno(r, "Failed to parse /proc/self/mountinfo: %m"); |
e537352b | 1894 | |
5cca8def | 1895 | for (;;) { |
95b862b0 | 1896 | struct libmnt_fs *fs; |
8d3ae2bd | 1897 | const char *device, *path, *options, *fstype; |
b08d03ff | 1898 | |
13dcfe46 ZJS |
1899 | r = mnt_table_next_fs(table, iter, &fs); |
1900 | if (r == 1) | |
5cca8def | 1901 | break; |
13dcfe46 ZJS |
1902 | if (r < 0) |
1903 | return log_error_errno(r, "Failed to get next entry from /proc/self/mountinfo: %m"); | |
5cca8def | 1904 | |
8d3ae2bd CL |
1905 | device = mnt_fs_get_source(fs); |
1906 | path = mnt_fs_get_target(fs); | |
1907 | options = mnt_fs_get_options(fs); | |
1908 | fstype = mnt_fs_get_fstype(fs); | |
a2e0f3d3 | 1909 | |
c0a7f8d3 DM |
1910 | if (!device || !path) |
1911 | continue; | |
1912 | ||
9d1b2b22 | 1913 | device_found_node(m, device, DEVICE_FOUND_MOUNT, DEVICE_FOUND_MOUNT); |
628c89cc | 1914 | |
9d1b2b22 | 1915 | (void) mount_setup_unit(m, device, path, options, fstype, set_flags); |
b08d03ff LP |
1916 | } |
1917 | ||
ba0d56f5 | 1918 | return 0; |
e537352b LP |
1919 | } |
1920 | ||
1921 | static void mount_shutdown(Manager *m) { | |
1922 | assert(m); | |
1923 | ||
5dcadb4c | 1924 | m->mount_event_source = sd_event_source_disable_unref(m->mount_event_source); |
718db961 | 1925 | |
d379d442 KZ |
1926 | mnt_unref_monitor(m->mount_monitor); |
1927 | m->mount_monitor = NULL; | |
b08d03ff LP |
1928 | } |
1929 | ||
19ae8986 LP |
1930 | static void mount_handoff_timestamp( |
1931 | Unit *u, | |
1932 | const struct ucred *ucred, | |
1933 | const dual_timestamp *ts) { | |
1934 | ||
1935 | Mount *m = ASSERT_PTR(MOUNT(u)); | |
1936 | ||
1937 | assert(ucred); | |
1938 | assert(ts); | |
1939 | ||
1940 | if (m->control_pid.pid == ucred->pid && m->control_command) { | |
1941 | exec_status_handoff(&m->control_command->exec_status, ucred, ts); | |
1942 | unit_add_to_dbus_queue(u); | |
1943 | } | |
1944 | } | |
1945 | ||
7a7821c8 | 1946 | static int mount_get_timeout(Unit *u, usec_t *timeout) { |
e9fa1bf7 | 1947 | Mount *m = ASSERT_PTR(MOUNT(u)); |
7a7821c8 | 1948 | usec_t t; |
68db7a3b ZJS |
1949 | int r; |
1950 | ||
1951 | if (!m->timer_event_source) | |
1952 | return 0; | |
1953 | ||
7a7821c8 | 1954 | r = sd_event_source_get_time(m->timer_event_source, &t); |
68db7a3b ZJS |
1955 | if (r < 0) |
1956 | return r; | |
7a7821c8 LP |
1957 | if (t == USEC_INFINITY) |
1958 | return 0; | |
68db7a3b | 1959 | |
7a7821c8 | 1960 | *timeout = t; |
68db7a3b ZJS |
1961 | return 1; |
1962 | } | |
1963 | ||
04eb582a | 1964 | static void mount_enumerate_perpetual(Manager *m) { |
11222d0f LP |
1965 | Unit *u; |
1966 | int r; | |
1967 | ||
1968 | assert(m); | |
1969 | ||
1970 | /* Whatever happens, we know for sure that the root directory is around, and cannot go away. Let's | |
1971 | * unconditionally synthesize it here and mark it as perpetual. */ | |
1972 | ||
1973 | u = manager_get_unit(m, SPECIAL_ROOT_MOUNT); | |
1974 | if (!u) { | |
a581e45a | 1975 | r = unit_new_for_name(m, sizeof(Mount), SPECIAL_ROOT_MOUNT, &u); |
04eb582a LP |
1976 | if (r < 0) { |
1977 | log_error_errno(r, "Failed to allocate the special " SPECIAL_ROOT_MOUNT " unit: %m"); | |
1978 | return; | |
1979 | } | |
11222d0f LP |
1980 | } |
1981 | ||
1982 | u->perpetual = true; | |
1983 | MOUNT(u)->deserialized_state = MOUNT_MOUNTED; | |
1984 | ||
1985 | unit_add_to_load_queue(u); | |
1986 | unit_add_to_dbus_queue(u); | |
1987 | } | |
1988 | ||
1989 | static bool mount_is_mounted(Mount *m) { | |
1990 | assert(m); | |
1991 | ||
ec88d1ea | 1992 | return UNIT(m)->perpetual || FLAGS_SET(m->proc_flags, MOUNT_PROC_IS_MOUNTED); |
11222d0f LP |
1993 | } |
1994 | ||
edc027b4 | 1995 | static int mount_on_ratelimit_expire(sd_event_source *s, void *userdata) { |
99534007 | 1996 | Manager *m = ASSERT_PTR(userdata); |
c29e6a95 | 1997 | Job *j; |
edc027b4 | 1998 | |
c29e6a95 MS |
1999 | /* Let's enqueue all start jobs that were previously skipped because of active ratelimit. */ |
2000 | HASHMAP_FOREACH(j, m->jobs) { | |
2001 | if (j->unit->type != UNIT_MOUNT) | |
2002 | continue; | |
2003 | ||
2004 | job_add_to_run_queue(j); | |
2005 | } | |
2006 | ||
b0c4b282 LP |
2007 | /* By entering ratelimited state we made all mount start jobs not runnable, now rate limit is over so |
2008 | * let's make sure we dispatch them in the next iteration. */ | |
2009 | manager_trigger_run_queue(m); | |
edc027b4 MS |
2010 | |
2011 | return 0; | |
2012 | } | |
2013 | ||
ba64af90 | 2014 | static void mount_enumerate(Manager *m) { |
b08d03ff | 2015 | int r; |
d379d442 | 2016 | |
b08d03ff LP |
2017 | assert(m); |
2018 | ||
8d3ae2bd CL |
2019 | mnt_init_debug(0); |
2020 | ||
d379d442 | 2021 | if (!m->mount_monitor) { |
24a4542c | 2022 | unsigned mount_rate_limit_burst = 5; |
d379d442 | 2023 | int fd; |
ef734fd6 | 2024 | |
d379d442 KZ |
2025 | m->mount_monitor = mnt_new_monitor(); |
2026 | if (!m->mount_monitor) { | |
ba64af90 | 2027 | log_oom(); |
718db961 | 2028 | goto fail; |
d379d442 | 2029 | } |
29083707 | 2030 | |
d379d442 | 2031 | r = mnt_monitor_enable_kernel(m->mount_monitor, 1); |
ba64af90 LP |
2032 | if (r < 0) { |
2033 | log_error_errno(r, "Failed to enable watching of kernel mount events: %m"); | |
29083707 | 2034 | goto fail; |
ba64af90 LP |
2035 | } |
2036 | ||
d379d442 | 2037 | r = mnt_monitor_enable_userspace(m->mount_monitor, 1, NULL); |
ba64af90 LP |
2038 | if (r < 0) { |
2039 | log_error_errno(r, "Failed to enable watching of userspace mount events: %m"); | |
f7c1ad4f | 2040 | goto fail; |
ba64af90 | 2041 | } |
90598531 | 2042 | |
d379d442 KZ |
2043 | /* mnt_unref_monitor() will close the fd */ |
2044 | fd = r = mnt_monitor_get_fd(m->mount_monitor); | |
ba64af90 LP |
2045 | if (r < 0) { |
2046 | log_error_errno(r, "Failed to acquire watch file descriptor: %m"); | |
f7c1ad4f | 2047 | goto fail; |
ba64af90 | 2048 | } |
befb6d54 | 2049 | |
d379d442 | 2050 | r = sd_event_add_io(m->event, &m->mount_event_source, fd, EPOLLIN, mount_dispatch_io, m); |
ba64af90 LP |
2051 | if (r < 0) { |
2052 | log_error_errno(r, "Failed to watch mount file descriptor: %m"); | |
befb6d54 | 2053 | goto fail; |
ba64af90 | 2054 | } |
befb6d54 | 2055 | |
d42b61d2 | 2056 | r = sd_event_source_set_priority(m->mount_event_source, EVENT_PRIORITY_MOUNT_TABLE); |
ba64af90 LP |
2057 | if (r < 0) { |
2058 | log_error_errno(r, "Failed to adjust mount watch priority: %m"); | |
befb6d54 | 2059 | goto fail; |
ba64af90 | 2060 | } |
7dfbe2e3 | 2061 | |
24a4542c LB |
2062 | /* Let users override the default (5 in 1s), as it stalls the boot sequence on busy systems. */ |
2063 | const char *e = secure_getenv("SYSTEMD_DEFAULT_MOUNT_RATE_LIMIT_BURST"); | |
2064 | if (e) { | |
2065 | r = safe_atou(e, &mount_rate_limit_burst); | |
2066 | if (r < 0) | |
2067 | log_debug("Invalid value in $SYSTEMD_DEFAULT_MOUNT_RATE_LIMIT_BURST, ignoring: %s", e); | |
2068 | } | |
2069 | ||
2070 | r = sd_event_source_set_ratelimit(m->mount_event_source, 1 * USEC_PER_SEC, mount_rate_limit_burst); | |
d586f642 MS |
2071 | if (r < 0) { |
2072 | log_error_errno(r, "Failed to enable rate limit for mount events: %m"); | |
2073 | goto fail; | |
2074 | } | |
2075 | ||
edc027b4 MS |
2076 | r = sd_event_source_set_ratelimit_expire_callback(m->mount_event_source, mount_on_ratelimit_expire); |
2077 | if (r < 0) { | |
2078 | log_error_errno(r, "Failed to enable rate limit for mount events: %m"); | |
2079 | goto fail; | |
2080 | } | |
2081 | ||
d379d442 | 2082 | (void) sd_event_source_set_description(m->mount_event_source, "mount-monitor-dispatch"); |
befb6d54 CL |
2083 | } |
2084 | ||
e62d8c39 ZJS |
2085 | r = mount_load_proc_self_mountinfo(m, false); |
2086 | if (r < 0) | |
b08d03ff LP |
2087 | goto fail; |
2088 | ||
ba64af90 | 2089 | return; |
b08d03ff LP |
2090 | |
2091 | fail: | |
2092 | mount_shutdown(m); | |
5cb5a6ff LP |
2093 | } |
2094 | ||
fcd8e119 LP |
2095 | static int drain_libmount(Manager *m) { |
2096 | bool rescan = false; | |
2097 | int r; | |
2098 | ||
2099 | assert(m); | |
2100 | ||
2101 | /* Drain all events and verify that the event is valid. | |
2102 | * | |
2103 | * Note that libmount also monitors /run/mount mkdir if the directory does not exist yet. The mkdir | |
2104 | * may generate event which is irrelevant for us. | |
2105 | * | |
2106 | * error: r < 0; valid: r == 0, false positive: r == 1 */ | |
2107 | do { | |
2108 | r = mnt_monitor_next_change(m->mount_monitor, NULL, NULL); | |
2109 | if (r < 0) | |
2110 | return log_error_errno(r, "Failed to drain libmount events: %m"); | |
2111 | if (r == 0) | |
2112 | rescan = true; | |
2113 | } while (r == 0); | |
2114 | ||
2115 | return rescan; | |
2116 | } | |
2117 | ||
35080486 | 2118 | static int mount_process_proc_self_mountinfo(Manager *m) { |
6688b72d | 2119 | _cleanup_set_free_ Set *around = NULL, *gone = NULL; |
ec8126d7 | 2120 | const char *what; |
ef734fd6 LP |
2121 | int r; |
2122 | ||
2123 | assert(m); | |
ef734fd6 | 2124 | |
fcd8e119 LP |
2125 | r = drain_libmount(m); |
2126 | if (r <= 0) | |
2127 | return r; | |
ef734fd6 | 2128 | |
4f0eedb7 ZJS |
2129 | r = mount_load_proc_self_mountinfo(m, true); |
2130 | if (r < 0) { | |
e537352b | 2131 | /* Reset flags, just in case, for later calls */ |
ec88d1ea LP |
2132 | LIST_FOREACH(units_by_type, u, m->units_by_type[UNIT_MOUNT]) |
2133 | MOUNT(u)->proc_flags = 0; | |
e537352b | 2134 | |
ec8126d7 | 2135 | return 0; |
ef734fd6 LP |
2136 | } |
2137 | ||
2138 | manager_dispatch_load_queue(m); | |
2139 | ||
595ed347 MS |
2140 | LIST_FOREACH(units_by_type, u, m->units_by_type[UNIT_MOUNT]) { |
2141 | Mount *mount = MOUNT(u); | |
ef734fd6 | 2142 | |
1e122561 YW |
2143 | mount->invalidated_state = false; |
2144 | ||
11222d0f | 2145 | if (!mount_is_mounted(mount)) { |
e537352b | 2146 | |
1483892a | 2147 | /* A mount point is not around right now. It might be gone, or might never have |
394763f6 LP |
2148 | * existed. */ |
2149 | ||
2150 | if (mount->from_proc_self_mountinfo && | |
6688b72d | 2151 | mount->parameters_proc_self_mountinfo.what) |
394763f6 | 2152 | /* Remember that this device might just have disappeared */ |
6688b72d | 2153 | if (set_put_strdup_full(&gone, &path_hash_ops_free, mount->parameters_proc_self_mountinfo.what) < 0) |
394763f6 | 2154 | log_oom(); /* we don't care too much about OOM here... */ |
fcd8b266 | 2155 | |
ef734fd6 | 2156 | mount->from_proc_self_mountinfo = false; |
9ddaa3e4 | 2157 | assert_se(update_parameters_proc_self_mountinfo(mount, NULL, NULL, NULL) >= 0); |
e537352b LP |
2158 | |
2159 | switch (mount->state) { | |
2160 | ||
2161 | case MOUNT_MOUNTED: | |
e3783068 MY |
2162 | /* This has just been unmounted by somebody else, follow the state change. |
2163 | * Also explicitly override the result (see the comment in mount_sigchld_event()), | |
2164 | * but more aggressively here since the state change is extrinsic. */ | |
2165 | mount_cycle_clear(mount); | |
2166 | mount_enter_dead(mount, MOUNT_SUCCESS, /* flush_result = */ true); | |
e537352b LP |
2167 | break; |
2168 | ||
2fa0bd7d YW |
2169 | case MOUNT_MOUNTING_DONE: |
2170 | /* The mount command may add the corresponding proc mountinfo entry and | |
2171 | * then remove it because of an internal error. E.g., fuse.sshfs seems | |
2172 | * to do that when the connection fails. See #17617. To handle such the | |
2173 | * case, let's once set the state back to mounting. Then, the unit can | |
8e94bb62 | 2174 | * correctly enter the failed state later in mount_sigchld_event(). */ |
2fa0bd7d YW |
2175 | mount_set_state(mount, MOUNT_MOUNTING); |
2176 | break; | |
2177 | ||
e537352b | 2178 | default: |
e537352b | 2179 | break; |
e537352b LP |
2180 | } |
2181 | ||
ec88d1ea | 2182 | } else if (mount->proc_flags & (MOUNT_PROC_JUST_MOUNTED|MOUNT_PROC_JUST_CHANGED)) { |
e537352b | 2183 | |
fcd8b266 | 2184 | /* A mount point was added or changed */ |
e537352b LP |
2185 | |
2186 | switch (mount->state) { | |
2187 | ||
2188 | case MOUNT_DEAD: | |
fdf20a31 | 2189 | case MOUNT_FAILED: |
4b58153d LP |
2190 | |
2191 | /* This has just been mounted by somebody else, follow the state change, but let's | |
2192 | * generate a new invocation ID for this implicitly and automatically. */ | |
7eba1463 LP |
2193 | (void) unit_acquire_invocation_id(u); |
2194 | mount_cycle_clear(mount); | |
9d2f5178 | 2195 | mount_enter_mounted(mount, MOUNT_SUCCESS); |
e537352b LP |
2196 | break; |
2197 | ||
2198 | case MOUNT_MOUNTING: | |
5bcb0f2b | 2199 | mount_set_state(mount, MOUNT_MOUNTING_DONE); |
e537352b LP |
2200 | break; |
2201 | ||
2202 | default: | |
1483892a LP |
2203 | /* Nothing really changed, but let's issue an notification call nonetheless, |
2204 | * in case somebody is waiting for this. (e.g. file system ro/rw | |
2205 | * remounts.) */ | |
e537352b LP |
2206 | mount_set_state(mount, mount->state); |
2207 | break; | |
2208 | } | |
394763f6 | 2209 | } |
fcd8b266 | 2210 | |
11222d0f | 2211 | if (mount_is_mounted(mount) && |
394763f6 | 2212 | mount->from_proc_self_mountinfo && |
6688b72d | 2213 | mount->parameters_proc_self_mountinfo.what) |
b6418dc9 | 2214 | /* Track devices currently used */ |
6688b72d | 2215 | if (set_put_strdup_full(&around, &path_hash_ops_free, mount->parameters_proc_self_mountinfo.what) < 0) |
394763f6 | 2216 | log_oom(); |
e537352b LP |
2217 | |
2218 | /* Reset the flags for later calls */ | |
ec88d1ea | 2219 | mount->proc_flags = 0; |
e537352b | 2220 | } |
718db961 | 2221 | |
90e74a66 | 2222 | SET_FOREACH(what, gone) { |
fcd8b266 LP |
2223 | if (set_contains(around, what)) |
2224 | continue; | |
2225 | ||
2226 | /* Let the device units know that the device is no longer mounted */ | |
b1ba0ce8 | 2227 | device_found_node(m, what, DEVICE_NOT_FOUND, DEVICE_FOUND_MOUNT); |
fcd8b266 | 2228 | } |
ec8126d7 ZJS |
2229 | |
2230 | return 0; | |
e537352b LP |
2231 | } |
2232 | ||
35080486 | 2233 | static int mount_dispatch_io(sd_event_source *source, int fd, uint32_t revents, void *userdata) { |
99534007 | 2234 | Manager *m = ASSERT_PTR(userdata); |
35080486 | 2235 | |
35080486 LP |
2236 | assert(revents & EPOLLIN); |
2237 | ||
2238 | return mount_process_proc_self_mountinfo(m); | |
2239 | } | |
2240 | ||
1e122561 YW |
2241 | int mount_invalidate_state_by_path(Manager *manager, const char *path) { |
2242 | _cleanup_free_ char *name = NULL; | |
2243 | Unit *u; | |
2244 | int r; | |
2245 | ||
2246 | assert(manager); | |
2247 | assert(path); | |
2248 | ||
2249 | r = unit_name_from_path(path, ".mount", &name); | |
2250 | if (r < 0) | |
2251 | return log_debug_errno(r, "Failed to generate unit name from path \"%s\", ignoring: %m", path); | |
2252 | ||
2253 | u = manager_get_unit(manager, name); | |
2254 | if (!u) | |
2255 | return -ENOENT; | |
2256 | ||
2257 | MOUNT(u)->invalidated_state = true; | |
2258 | return 0; | |
2259 | } | |
2260 | ||
fdf20a31 | 2261 | static void mount_reset_failed(Unit *u) { |
5632e374 LP |
2262 | Mount *m = MOUNT(u); |
2263 | ||
2264 | assert(m); | |
2265 | ||
fdf20a31 | 2266 | if (m->state == MOUNT_FAILED) |
5632e374 LP |
2267 | mount_set_state(m, MOUNT_DEAD); |
2268 | ||
9d2f5178 LP |
2269 | m->result = MOUNT_SUCCESS; |
2270 | m->reload_result = MOUNT_SUCCESS; | |
17e9d53d | 2271 | m->clean_result = MOUNT_SUCCESS; |
5632e374 LP |
2272 | } |
2273 | ||
37eb258e LP |
2274 | static PidRef* mount_control_pid(Unit *u) { |
2275 | return &ASSERT_PTR(MOUNT(u))->control_pid; | |
291d565a LP |
2276 | } |
2277 | ||
17e9d53d YW |
2278 | static int mount_clean(Unit *u, ExecCleanMask mask) { |
2279 | _cleanup_strv_free_ char **l = NULL; | |
2280 | Mount *m = MOUNT(u); | |
2281 | int r; | |
2282 | ||
2283 | assert(m); | |
2284 | assert(mask != 0); | |
2285 | ||
2286 | if (m->state != MOUNT_DEAD) | |
2287 | return -EBUSY; | |
2288 | ||
2289 | r = exec_context_get_clean_directories(&m->exec_context, u->manager->prefix, mask, &l); | |
2290 | if (r < 0) | |
2291 | return r; | |
2292 | ||
2293 | if (strv_isempty(l)) | |
2294 | return -EUNATCH; | |
2295 | ||
2296 | mount_unwatch_control_pid(m); | |
2297 | m->clean_result = MOUNT_SUCCESS; | |
2298 | m->control_command = NULL; | |
2299 | m->control_command_id = _MOUNT_EXEC_COMMAND_INVALID; | |
2300 | ||
e9276800 | 2301 | r = mount_arm_timer(m, /* relative= */ true, m->exec_context.timeout_clean_usec); |
d30eb0b5 LP |
2302 | if (r < 0) { |
2303 | log_unit_warning_errno(u, r, "Failed to install timer: %m"); | |
17e9d53d | 2304 | goto fail; |
d30eb0b5 | 2305 | } |
17e9d53d | 2306 | |
4775b55d | 2307 | r = unit_fork_and_watch_rm_rf(u, l, &m->control_pid); |
d30eb0b5 LP |
2308 | if (r < 0) { |
2309 | log_unit_warning_errno(u, r, "Failed to spawn cleaning task: %m"); | |
360f384f | 2310 | goto fail; |
d30eb0b5 | 2311 | } |
17e9d53d | 2312 | |
360f384f | 2313 | mount_set_state(m, MOUNT_CLEANING); |
17e9d53d YW |
2314 | return 0; |
2315 | ||
2316 | fail: | |
17e9d53d | 2317 | m->clean_result = MOUNT_FAILURE_RESOURCES; |
5dcadb4c | 2318 | m->timer_event_source = sd_event_source_disable_unref(m->timer_event_source); |
17e9d53d YW |
2319 | return r; |
2320 | } | |
2321 | ||
2322 | static int mount_can_clean(Unit *u, ExecCleanMask *ret) { | |
e9fa1bf7 | 2323 | Mount *m = ASSERT_PTR(MOUNT(u)); |
17e9d53d YW |
2324 | |
2325 | return exec_context_get_clean_mask(&m->exec_context, ret); | |
2326 | } | |
2327 | ||
705578c3 | 2328 | static int mount_can_start(Unit *u) { |
e9fa1bf7 | 2329 | Mount *m = ASSERT_PTR(MOUNT(u)); |
9727f242 DDM |
2330 | int r; |
2331 | ||
9727f242 DDM |
2332 | r = unit_test_start_limit(u); |
2333 | if (r < 0) { | |
e3783068 | 2334 | mount_enter_dead(m, MOUNT_FAILURE_START_LIMIT_HIT, /* flush_result = */ false); |
9727f242 DDM |
2335 | return r; |
2336 | } | |
2337 | ||
705578c3 | 2338 | return 1; |
9727f242 DDM |
2339 | } |
2340 | ||
47261967 LP |
2341 | static int mount_subsystem_ratelimited(Manager *m) { |
2342 | assert(m); | |
2343 | ||
2344 | if (!m->mount_event_source) | |
2345 | return false; | |
2346 | ||
2347 | return sd_event_source_is_ratelimited(m->mount_event_source); | |
2348 | } | |
2349 | ||
8dbab37d DDM |
2350 | char* mount_get_what_escaped(const Mount *m) { |
2351 | _cleanup_free_ char *escaped = NULL; | |
2352 | const char *s = NULL; | |
2353 | ||
2354 | assert(m); | |
2355 | ||
2356 | if (m->from_proc_self_mountinfo && m->parameters_proc_self_mountinfo.what) | |
2357 | s = m->parameters_proc_self_mountinfo.what; | |
2358 | else if (m->from_fragment && m->parameters_fragment.what) | |
2359 | s = m->parameters_fragment.what; | |
2360 | ||
2361 | if (s) { | |
2362 | escaped = utf8_escape_invalid(s); | |
2363 | if (!escaped) | |
2364 | return NULL; | |
2365 | } | |
2366 | ||
2367 | return escaped ? TAKE_PTR(escaped) : strdup(""); | |
2368 | } | |
2369 | ||
2370 | char* mount_get_options_escaped(const Mount *m) { | |
2371 | _cleanup_free_ char *escaped = NULL; | |
2372 | const char *s = NULL; | |
2373 | ||
2374 | assert(m); | |
2375 | ||
2376 | if (m->from_proc_self_mountinfo && m->parameters_proc_self_mountinfo.options) | |
2377 | s = m->parameters_proc_self_mountinfo.options; | |
2378 | else if (m->from_fragment && m->parameters_fragment.options) | |
2379 | s = m->parameters_fragment.options; | |
2380 | ||
2381 | if (s) { | |
2382 | escaped = utf8_escape_invalid(s); | |
2383 | if (!escaped) | |
2384 | return NULL; | |
2385 | } | |
2386 | ||
2387 | return escaped ? TAKE_PTR(escaped) : strdup(""); | |
2388 | } | |
2389 | ||
2390 | const char* mount_get_fstype(const Mount *m) { | |
2391 | assert(m); | |
2392 | ||
2393 | if (m->from_proc_self_mountinfo && m->parameters_proc_self_mountinfo.fstype) | |
2394 | return m->parameters_proc_self_mountinfo.fstype; | |
2395 | ||
2396 | if (m->from_fragment && m->parameters_fragment.fstype) | |
2397 | return m->parameters_fragment.fstype; | |
2398 | ||
2399 | return NULL; | |
2400 | } | |
2401 | ||
a16e1123 | 2402 | static const char* const mount_exec_command_table[_MOUNT_EXEC_COMMAND_MAX] = { |
48d83e33 | 2403 | [MOUNT_EXEC_MOUNT] = "ExecMount", |
a16e1123 LP |
2404 | [MOUNT_EXEC_UNMOUNT] = "ExecUnmount", |
2405 | [MOUNT_EXEC_REMOUNT] = "ExecRemount", | |
2406 | }; | |
2407 | ||
2408 | DEFINE_STRING_TABLE_LOOKUP(mount_exec_command, MountExecCommand); | |
2409 | ||
9d2f5178 | 2410 | static const char* const mount_result_table[_MOUNT_RESULT_MAX] = { |
48d83e33 ZJS |
2411 | [MOUNT_SUCCESS] = "success", |
2412 | [MOUNT_FAILURE_RESOURCES] = "resources", | |
2413 | [MOUNT_FAILURE_TIMEOUT] = "timeout", | |
2414 | [MOUNT_FAILURE_EXIT_CODE] = "exit-code", | |
2415 | [MOUNT_FAILURE_SIGNAL] = "signal", | |
2416 | [MOUNT_FAILURE_CORE_DUMP] = "core-dump", | |
07299350 | 2417 | [MOUNT_FAILURE_START_LIMIT_HIT] = "start-limit-hit", |
48d83e33 | 2418 | [MOUNT_FAILURE_PROTOCOL] = "protocol", |
9d2f5178 LP |
2419 | }; |
2420 | ||
2421 | DEFINE_STRING_TABLE_LOOKUP(mount_result, MountResult); | |
2422 | ||
87f0e418 | 2423 | const UnitVTable mount_vtable = { |
7d17cfbc | 2424 | .object_size = sizeof(Mount), |
718db961 LP |
2425 | .exec_context_offset = offsetof(Mount, exec_context), |
2426 | .cgroup_context_offset = offsetof(Mount, cgroup_context), | |
2427 | .kill_context_offset = offsetof(Mount, kill_context), | |
613b411c | 2428 | .exec_runtime_offset = offsetof(Mount, exec_runtime), |
9cc54544 | 2429 | .cgroup_runtime_offset = offsetof(Mount, cgroup_runtime), |
3ef63c31 | 2430 | |
f975e971 LP |
2431 | .sections = |
2432 | "Unit\0" | |
2433 | "Mount\0" | |
2434 | "Install\0", | |
4ad49000 | 2435 | .private_section = "Mount", |
71645aca | 2436 | |
c80a9a33 LP |
2437 | .can_transient = true, |
2438 | .can_fail = true, | |
755021d4 | 2439 | .exclude_from_switch_root_serialization = true, |
c80a9a33 | 2440 | |
e537352b LP |
2441 | .init = mount_init, |
2442 | .load = mount_load, | |
034c6ed7 | 2443 | .done = mount_done, |
e537352b | 2444 | |
f50e0a01 | 2445 | .coldplug = mount_coldplug, |
01400460 | 2446 | .catchup = mount_catchup, |
f50e0a01 | 2447 | |
034c6ed7 | 2448 | .dump = mount_dump, |
5cb5a6ff | 2449 | |
e537352b LP |
2450 | .start = mount_start, |
2451 | .stop = mount_stop, | |
2452 | .reload = mount_reload, | |
2453 | ||
17e9d53d YW |
2454 | .clean = mount_clean, |
2455 | .can_clean = mount_can_clean, | |
8a0867d6 | 2456 | |
a16e1123 LP |
2457 | .serialize = mount_serialize, |
2458 | .deserialize_item = mount_deserialize_item, | |
2459 | ||
f50e0a01 | 2460 | .active_state = mount_active_state, |
10a94420 | 2461 | .sub_state_to_string = mount_sub_state_to_string, |
b08d03ff | 2462 | |
52a12341 YW |
2463 | .will_restart = unit_will_restart_default, |
2464 | ||
f2f725e5 | 2465 | .may_gc = mount_may_gc, |
39c79477 | 2466 | .is_extrinsic = mount_is_extrinsic, |
701cc384 | 2467 | |
e537352b | 2468 | .sigchld_event = mount_sigchld_event, |
e537352b | 2469 | |
fdf20a31 | 2470 | .reset_failed = mount_reset_failed, |
291d565a | 2471 | |
19ae8986 LP |
2472 | .notify_handoff_timestamp = mount_handoff_timestamp, |
2473 | ||
291d565a | 2474 | .control_pid = mount_control_pid, |
5632e374 | 2475 | |
74c964d3 LP |
2476 | .bus_set_property = bus_mount_set_property, |
2477 | .bus_commit_properties = bus_mount_commit_properties, | |
4139c1b2 | 2478 | |
68db7a3b ZJS |
2479 | .get_timeout = mount_get_timeout, |
2480 | ||
04eb582a | 2481 | .enumerate_perpetual = mount_enumerate_perpetual, |
f50e0a01 | 2482 | .enumerate = mount_enumerate, |
c6918296 | 2483 | .shutdown = mount_shutdown, |
47261967 | 2484 | .subsystem_ratelimited = mount_subsystem_ratelimited, |
c6918296 MS |
2485 | |
2486 | .status_message_formats = { | |
2487 | .starting_stopping = { | |
2488 | [0] = "Mounting %s...", | |
2489 | [1] = "Unmounting %s...", | |
2490 | }, | |
2491 | .finished_start_job = { | |
2492 | [JOB_DONE] = "Mounted %s.", | |
2493 | [JOB_FAILED] = "Failed to mount %s.", | |
c6918296 MS |
2494 | [JOB_TIMEOUT] = "Timed out mounting %s.", |
2495 | }, | |
2496 | .finished_stop_job = { | |
2497 | [JOB_DONE] = "Unmounted %s.", | |
2498 | [JOB_FAILED] = "Failed unmounting %s.", | |
2499 | [JOB_TIMEOUT] = "Timed out unmounting %s.", | |
2500 | }, | |
2501 | }, | |
9727f242 | 2502 | |
705578c3 | 2503 | .can_start = mount_can_start, |
b2bfd121 LP |
2504 | |
2505 | .notify_plymouth = true, | |
5cb5a6ff | 2506 | }; |