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Commit | Line | Data |
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53e1b683 | 1 | /* SPDX-License-Identifier: LGPL-2.1+ */ |
1ee306e1 LP |
2 | |
3 | #include <errno.h> | |
1ee306e1 LP |
4 | #include <string.h> |
5 | #include <unistd.h> | |
1ee306e1 | 6 | |
c3350683 | 7 | #include "sd-daemon.h" |
3ffd4af2 | 8 | |
b5efdb8a | 9 | #include "alloc-util.h" |
c3350683 | 10 | #include "bus-error.h" |
3ffd4af2 LP |
11 | #include "bus-util.h" |
12 | #include "cgroup-util.h" | |
a0956174 | 13 | #include "dirent-util.h" |
3ffd4af2 | 14 | #include "fd-util.h" |
f97b34a6 | 15 | #include "format-util.h" |
25300b5a | 16 | #include "hostname-util.h" |
3ffd4af2 | 17 | #include "label.h" |
1ddb263d | 18 | #include "machine-image.h" |
ebeccf9e | 19 | #include "machined.h" |
df0ff127 | 20 | #include "process-util.h" |
3ffd4af2 | 21 | #include "signal-util.h" |
e5af6e0e | 22 | #include "special.h" |
1ee306e1 | 23 | |
730fa7ce LP |
24 | static Manager* manager_unref(Manager *m); |
25 | DEFINE_TRIVIAL_CLEANUP_FUNC(Manager*, manager_unref); | |
26 | ||
27 | static int manager_new(Manager **ret) { | |
28 | _cleanup_(manager_unrefp) Manager *m = NULL; | |
c3350683 | 29 | int r; |
1ee306e1 | 30 | |
730fa7ce LP |
31 | assert(ret); |
32 | ||
1ee306e1 LP |
33 | m = new0(Manager, 1); |
34 | if (!m) | |
730fa7ce | 35 | return -ENOMEM; |
1ee306e1 | 36 | |
d5099efc MS |
37 | m->machines = hashmap_new(&string_hash_ops); |
38 | m->machine_units = hashmap_new(&string_hash_ops); | |
39 | m->machine_leaders = hashmap_new(NULL); | |
1ee306e1 | 40 | |
730fa7ce LP |
41 | if (!m->machines || !m->machine_units || !m->machine_leaders) |
42 | return -ENOMEM; | |
c3350683 | 43 | |
afc6adb5 | 44 | r = sd_event_default(&m->event); |
730fa7ce LP |
45 | if (r < 0) |
46 | return r; | |
47 | ||
48 | r = sd_event_add_signal(m->event, NULL, SIGINT, NULL, NULL); | |
49 | if (r < 0) | |
50 | return r; | |
51 | ||
52 | r = sd_event_add_signal(m->event, NULL, SIGTERM, NULL, NULL); | |
53 | if (r < 0) | |
54 | return r; | |
1ee306e1 | 55 | |
730fa7ce | 56 | (void) sd_event_set_watchdog(m->event, true); |
cde93897 | 57 | |
730fa7ce LP |
58 | *ret = TAKE_PTR(m); |
59 | return 0; | |
1ee306e1 LP |
60 | } |
61 | ||
730fa7ce | 62 | static Manager* manager_unref(Manager *m) { |
1ee306e1 LP |
63 | Machine *machine; |
64 | ||
c8f05436 LP |
65 | if (!m) |
66 | return NULL; | |
1ee306e1 | 67 | |
56599585 LP |
68 | while (m->operations) |
69 | operation_free(m->operations); | |
70 | ||
71 | assert(m->n_operations == 0); | |
72 | ||
1ee306e1 LP |
73 | while ((machine = hashmap_first(m->machines))) |
74 | machine_free(machine); | |
75 | ||
76 | hashmap_free(m->machines); | |
77 | hashmap_free(m->machine_units); | |
d3e84ddb | 78 | hashmap_free(m->machine_leaders); |
1ee306e1 | 79 | |
224b0e7a | 80 | hashmap_free_with_destructor(m->image_cache, image_unref); |
1ddb263d LP |
81 | |
82 | sd_event_source_unref(m->image_cache_defer_event); | |
83 | ||
d04c1fb8 LP |
84 | bus_verify_polkit_async_registry_free(m->polkit_registry); |
85 | ||
c3350683 LP |
86 | sd_bus_unref(m->bus); |
87 | sd_event_unref(m->event); | |
88 | ||
730fa7ce | 89 | return mfree(m); |
c3350683 LP |
90 | } |
91 | ||
fbe55073 LP |
92 | static int manager_add_host_machine(Manager *m) { |
93 | _cleanup_free_ char *rd = NULL, *unit = NULL; | |
94 | sd_id128_t mid; | |
95 | Machine *t; | |
96 | int r; | |
97 | ||
98 | if (m->host_machine) | |
99 | return 0; | |
100 | ||
101 | r = sd_id128_get_machine(&mid); | |
102 | if (r < 0) | |
103 | return log_error_errno(r, "Failed to get machine ID: %m"); | |
104 | ||
105 | rd = strdup("/"); | |
106 | if (!rd) | |
107 | return log_oom(); | |
108 | ||
e5af6e0e | 109 | unit = strdup(SPECIAL_ROOT_SLICE); |
fbe55073 LP |
110 | if (!unit) |
111 | return log_oom(); | |
112 | ||
113 | t = machine_new(m, MACHINE_HOST, ".host"); | |
114 | if (!t) | |
115 | return log_oom(); | |
116 | ||
117 | t->leader = 1; | |
118 | t->id = mid; | |
119 | ||
1cc6c93a YW |
120 | t->root_directory = TAKE_PTR(rd); |
121 | t->unit = TAKE_PTR(unit); | |
fbe55073 LP |
122 | |
123 | dual_timestamp_from_boottime_or_monotonic(&t->timestamp, 0); | |
124 | ||
125 | m->host_machine = t; | |
126 | ||
127 | return 0; | |
128 | } | |
129 | ||
730fa7ce | 130 | static int manager_enumerate_machines(Manager *m) { |
1ee306e1 LP |
131 | _cleanup_closedir_ DIR *d = NULL; |
132 | struct dirent *de; | |
133 | int r = 0; | |
134 | ||
135 | assert(m); | |
136 | ||
fbe55073 LP |
137 | r = manager_add_host_machine(m); |
138 | if (r < 0) | |
139 | return r; | |
140 | ||
1ee306e1 LP |
141 | /* Read in machine data stored on disk */ |
142 | d = opendir("/run/systemd/machines"); | |
143 | if (!d) { | |
144 | if (errno == ENOENT) | |
145 | return 0; | |
146 | ||
e1427b13 | 147 | return log_error_errno(errno, "Failed to open /run/systemd/machines: %m"); |
1ee306e1 LP |
148 | } |
149 | ||
150 | FOREACH_DIRENT(de, d, return -errno) { | |
151 | struct Machine *machine; | |
152 | int k; | |
153 | ||
154 | if (!dirent_is_file(de)) | |
155 | continue; | |
156 | ||
b87633c4 LP |
157 | /* Ignore symlinks that map the unit name to the machine */ |
158 | if (startswith(de->d_name, "unit:")) | |
159 | continue; | |
160 | ||
b9a8d250 LP |
161 | if (!machine_name_is_valid(de->d_name)) |
162 | continue; | |
163 | ||
1ee306e1 LP |
164 | k = manager_add_machine(m, de->d_name, &machine); |
165 | if (k < 0) { | |
fbe55073 | 166 | r = log_error_errno(k, "Failed to add machine by file name %s: %m", de->d_name); |
1ee306e1 LP |
167 | continue; |
168 | } | |
169 | ||
170 | machine_add_to_gc_queue(machine); | |
171 | ||
172 | k = machine_load(machine); | |
173 | if (k < 0) | |
174 | r = k; | |
175 | } | |
176 | ||
177 | return r; | |
178 | } | |
179 | ||
1ee306e1 | 180 | static int manager_connect_bus(Manager *m) { |
1ee306e1 | 181 | int r; |
1ee306e1 LP |
182 | |
183 | assert(m); | |
184 | assert(!m->bus); | |
1ee306e1 | 185 | |
76b54375 | 186 | r = sd_bus_default_system(&m->bus); |
f647962d MS |
187 | if (r < 0) |
188 | return log_error_errno(r, "Failed to connect to system bus: %m"); | |
1ee306e1 | 189 | |
19befb2d | 190 | r = sd_bus_add_object_vtable(m->bus, NULL, "/org/freedesktop/machine1", "org.freedesktop.machine1.Manager", manager_vtable, m); |
f647962d MS |
191 | if (r < 0) |
192 | return log_error_errno(r, "Failed to add manager object vtable: %m"); | |
1ee306e1 | 193 | |
19befb2d | 194 | r = sd_bus_add_fallback_vtable(m->bus, NULL, "/org/freedesktop/machine1/machine", "org.freedesktop.machine1.Machine", machine_vtable, machine_object_find, m); |
f647962d MS |
195 | if (r < 0) |
196 | return log_error_errno(r, "Failed to add machine object vtable: %m"); | |
c3350683 | 197 | |
19befb2d | 198 | r = sd_bus_add_node_enumerator(m->bus, NULL, "/org/freedesktop/machine1/machine", machine_node_enumerator, m); |
f647962d MS |
199 | if (r < 0) |
200 | return log_error_errno(r, "Failed to add machine enumerator: %m"); | |
1ee306e1 | 201 | |
ebeccf9e LP |
202 | r = sd_bus_add_fallback_vtable(m->bus, NULL, "/org/freedesktop/machine1/image", "org.freedesktop.machine1.Image", image_vtable, image_object_find, m); |
203 | if (r < 0) | |
204 | return log_error_errno(r, "Failed to add image object vtable: %m"); | |
205 | ||
206 | r = sd_bus_add_node_enumerator(m->bus, NULL, "/org/freedesktop/machine1/image", image_node_enumerator, m); | |
207 | if (r < 0) | |
208 | return log_error_errno(r, "Failed to add image enumerator: %m"); | |
209 | ||
75152a4d LP |
210 | r = sd_bus_match_signal_async( |
211 | m->bus, | |
212 | NULL, | |
213 | "org.freedesktop.systemd1", | |
214 | "/org/freedesktop/systemd1", | |
215 | "org.freedesktop.systemd1.Manager", | |
216 | "JobRemoved", | |
217 | match_job_removed, NULL, m); | |
f647962d MS |
218 | if (r < 0) |
219 | return log_error_errno(r, "Failed to add match for JobRemoved: %m"); | |
1ee306e1 | 220 | |
75152a4d LP |
221 | r = sd_bus_match_signal_async( |
222 | m->bus, | |
223 | NULL, | |
224 | "org.freedesktop.systemd1", | |
225 | "/org/freedesktop/systemd1", | |
226 | "org.freedesktop.systemd1.Manager", | |
227 | "UnitRemoved", | |
228 | match_unit_removed, NULL, m); | |
f647962d | 229 | if (r < 0) |
75152a4d LP |
230 | return log_error_errno(r, "Failed to request match for UnitRemoved: %m"); |
231 | ||
232 | r = sd_bus_match_signal_async( | |
233 | m->bus, | |
234 | NULL, | |
235 | "org.freedesktop.systemd1", | |
236 | NULL, | |
237 | "org.freedesktop.DBus.Properties", | |
238 | "PropertiesChanged", | |
239 | match_properties_changed, NULL, m); | |
f647962d | 240 | if (r < 0) |
75152a4d LP |
241 | return log_error_errno(r, "Failed to request match for PropertiesChanged: %m"); |
242 | ||
243 | r = sd_bus_match_signal_async( | |
244 | m->bus, | |
245 | NULL, | |
246 | "org.freedesktop.systemd1", | |
247 | "/org/freedesktop/systemd1", | |
248 | "org.freedesktop.systemd1.Manager", | |
249 | "Reloading", | |
250 | match_reloading, NULL, m); | |
f647962d | 251 | if (r < 0) |
75152a4d | 252 | return log_error_errno(r, "Failed to request match for Reloading: %m"); |
6797c324 | 253 | |
31b2cd5d | 254 | r = sd_bus_call_method_async( |
1ee306e1 | 255 | m->bus, |
31b2cd5d | 256 | NULL, |
1ee306e1 LP |
257 | "org.freedesktop.systemd1", |
258 | "/org/freedesktop/systemd1", | |
259 | "org.freedesktop.systemd1.Manager", | |
260 | "Subscribe", | |
31b2cd5d LP |
261 | NULL, NULL, |
262 | NULL); | |
263 | if (r < 0) | |
264 | return log_error_errno(r, "Failed to enable subscription: %m"); | |
1ee306e1 | 265 | |
0c0b9306 | 266 | r = sd_bus_request_name_async(m->bus, NULL, "org.freedesktop.machine1", 0, NULL, NULL); |
f647962d | 267 | if (r < 0) |
0c0b9306 | 268 | return log_error_errno(r, "Failed to request name: %m"); |
1ee306e1 | 269 | |
c3350683 | 270 | r = sd_bus_attach_event(m->bus, m->event, 0); |
f647962d MS |
271 | if (r < 0) |
272 | return log_error_errno(r, "Failed to attach bus to event loop: %m"); | |
1ee306e1 | 273 | |
1ee306e1 | 274 | return 0; |
1ee306e1 LP |
275 | } |
276 | ||
730fa7ce | 277 | static void manager_gc(Manager *m, bool drop_not_started) { |
1ee306e1 LP |
278 | Machine *machine; |
279 | ||
280 | assert(m); | |
281 | ||
282 | while ((machine = m->machine_gc_queue)) { | |
71fda00f | 283 | LIST_REMOVE(gc_queue, m->machine_gc_queue, machine); |
1ee306e1 LP |
284 | machine->in_gc_queue = false; |
285 | ||
49f3fffd | 286 | /* First, if we are not closing yet, initiate stopping */ |
554ce41f | 287 | if (machine_may_gc(machine, drop_not_started) && |
49f3fffd | 288 | machine_get_state(machine) != MACHINE_CLOSING) |
1ee306e1 | 289 | machine_stop(machine); |
49f3fffd | 290 | |
61233823 | 291 | /* Now, the stop probably made this referenced |
49f3fffd LP |
292 | * again, but if it didn't, then it's time to let it |
293 | * go entirely. */ | |
554ce41f | 294 | if (machine_may_gc(machine, drop_not_started)) { |
49f3fffd | 295 | machine_finalize(machine); |
1ee306e1 LP |
296 | machine_free(machine); |
297 | } | |
298 | } | |
299 | } | |
300 | ||
730fa7ce | 301 | static int manager_startup(Manager *m) { |
1ee306e1 LP |
302 | Machine *machine; |
303 | Iterator i; | |
c3350683 | 304 | int r; |
1ee306e1 LP |
305 | |
306 | assert(m); | |
1ee306e1 LP |
307 | |
308 | /* Connect to the bus */ | |
309 | r = manager_connect_bus(m); | |
310 | if (r < 0) | |
311 | return r; | |
312 | ||
313 | /* Deserialize state */ | |
314 | manager_enumerate_machines(m); | |
315 | ||
316 | /* Remove stale objects before we start them */ | |
317 | manager_gc(m, false); | |
318 | ||
319 | /* And start everything */ | |
320 | HASHMAP_FOREACH(machine, m->machines, i) | |
c3350683 | 321 | machine_start(machine, NULL, NULL); |
1ee306e1 LP |
322 | |
323 | return 0; | |
324 | } | |
325 | ||
d9e34bfd LP |
326 | static bool check_idle(void *userdata) { |
327 | Manager *m = userdata; | |
1ee306e1 | 328 | |
56599585 LP |
329 | if (m->operations) |
330 | return false; | |
331 | ||
d9e34bfd | 332 | manager_gc(m, true); |
1ee306e1 | 333 | |
d9e34bfd LP |
334 | return hashmap_isempty(m->machines); |
335 | } | |
1ee306e1 | 336 | |
730fa7ce | 337 | static int manager_run(Manager *m) { |
d9e34bfd | 338 | assert(m); |
1ee306e1 | 339 | |
d9e34bfd LP |
340 | return bus_event_loop_with_idle( |
341 | m->event, | |
342 | m->bus, | |
343 | "org.freedesktop.machine1", | |
344 | DEFAULT_EXIT_USEC, | |
345 | check_idle, m); | |
1ee306e1 LP |
346 | } |
347 | ||
348 | int main(int argc, char *argv[]) { | |
730fa7ce | 349 | _cleanup_(manager_unrefp) Manager *m = NULL; |
1ee306e1 LP |
350 | int r; |
351 | ||
352 | log_set_target(LOG_TARGET_AUTO); | |
353 | log_set_facility(LOG_AUTH); | |
354 | log_parse_environment(); | |
355 | log_open(); | |
356 | ||
357 | umask(0022); | |
358 | ||
359 | if (argc != 1) { | |
360 | log_error("This program takes no arguments."); | |
361 | r = -EINVAL; | |
362 | goto finish; | |
363 | } | |
364 | ||
730fa7ce LP |
365 | /* Always create the directories people can create inotify watches in. Note that some applications might check |
366 | * for the existence of /run/systemd/machines/ to determine whether machined is available, so please always | |
367 | * make sure this check stays in. */ | |
368 | (void) mkdir_label("/run/systemd/machines", 0755); | |
1ee306e1 | 369 | |
730fa7ce | 370 | assert_se(sigprocmask_many(SIG_BLOCK, NULL, SIGCHLD, SIGTERM, SIGINT, -1) >= 0); |
0370612e | 371 | |
730fa7ce LP |
372 | r = manager_new(&m); |
373 | if (r < 0) { | |
374 | log_error_errno(r, "Failed to allocate manager object: %m"); | |
1ee306e1 LP |
375 | goto finish; |
376 | } | |
377 | ||
378 | r = manager_startup(m); | |
379 | if (r < 0) { | |
da927ba9 | 380 | log_error_errno(r, "Failed to fully start up daemon: %m"); |
1ee306e1 LP |
381 | goto finish; |
382 | } | |
383 | ||
df0ff127 | 384 | log_debug("systemd-machined running as pid "PID_FMT, getpid_cached()); |
1ee306e1 | 385 | |
c8f05436 LP |
386 | (void) sd_notify(false, |
387 | "READY=1\n" | |
388 | "STATUS=Processing requests..."); | |
1ee306e1 LP |
389 | |
390 | r = manager_run(m); | |
391 | ||
df0ff127 | 392 | log_debug("systemd-machined stopped as pid "PID_FMT, getpid_cached()); |
1ee306e1 | 393 | |
c8f05436 LP |
394 | (void) sd_notify(false, |
395 | "STOPPING=1\n" | |
396 | "STATUS=Shutting down..."); | |
397 | ||
1ee306e1 | 398 | finish: |
1ee306e1 LP |
399 | return r < 0 ? EXIT_FAILURE : EXIT_SUCCESS; |
400 | } |