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1ee306e1 LP |
1 | /*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/ |
2 | ||
3 | /*** | |
4 | This file is part of systemd. | |
5 | ||
6 | Copyright 2013 Lennart Poettering | |
7 | ||
8 | systemd is free software; you can redistribute it and/or modify it | |
9 | under the terms of the GNU Lesser General Public License as published by | |
10 | the Free Software Foundation; either version 2.1 of the License, or | |
11 | (at your option) any later version. | |
12 | ||
13 | systemd is distributed in the hope that it will be useful, but | |
14 | WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
16 | Lesser General Public License for more details. | |
17 | ||
18 | You should have received a copy of the GNU Lesser General Public License | |
19 | along with systemd; If not, see <http://www.gnu.org/licenses/>. | |
20 | ***/ | |
21 | ||
22 | #include <errno.h> | |
1ee306e1 LP |
23 | #include <string.h> |
24 | #include <unistd.h> | |
1ee306e1 | 25 | |
c3350683 | 26 | #include "sd-daemon.h" |
3ffd4af2 | 27 | |
c3350683 | 28 | #include "bus-error.h" |
3ffd4af2 LP |
29 | #include "bus-util.h" |
30 | #include "cgroup-util.h" | |
a0956174 | 31 | #include "dirent-util.h" |
3ffd4af2 | 32 | #include "fd-util.h" |
24882e06 | 33 | #include "formats-util.h" |
25300b5a | 34 | #include "hostname-util.h" |
3ffd4af2 | 35 | #include "label.h" |
1ddb263d | 36 | #include "machine-image.h" |
ebeccf9e | 37 | #include "machined.h" |
3ffd4af2 | 38 | #include "signal-util.h" |
1ee306e1 LP |
39 | |
40 | Manager *manager_new(void) { | |
41 | Manager *m; | |
c3350683 | 42 | int r; |
1ee306e1 LP |
43 | |
44 | m = new0(Manager, 1); | |
45 | if (!m) | |
46 | return NULL; | |
47 | ||
d5099efc MS |
48 | m->machines = hashmap_new(&string_hash_ops); |
49 | m->machine_units = hashmap_new(&string_hash_ops); | |
50 | m->machine_leaders = hashmap_new(NULL); | |
1ee306e1 | 51 | |
d3e84ddb | 52 | if (!m->machines || !m->machine_units || !m->machine_leaders) { |
c3350683 LP |
53 | manager_free(m); |
54 | return NULL; | |
55 | } | |
56 | ||
afc6adb5 | 57 | r = sd_event_default(&m->event); |
a658cafa | 58 | if (r < 0) { |
1ee306e1 LP |
59 | manager_free(m); |
60 | return NULL; | |
61 | } | |
62 | ||
cde93897 LP |
63 | sd_event_set_watchdog(m->event, true); |
64 | ||
1ee306e1 LP |
65 | return m; |
66 | } | |
67 | ||
68 | void manager_free(Manager *m) { | |
69 | Machine *machine; | |
1ddb263d | 70 | Image *i; |
1ee306e1 LP |
71 | |
72 | assert(m); | |
73 | ||
74 | while ((machine = hashmap_first(m->machines))) | |
75 | machine_free(machine); | |
76 | ||
77 | hashmap_free(m->machines); | |
78 | hashmap_free(m->machine_units); | |
d3e84ddb | 79 | hashmap_free(m->machine_leaders); |
1ee306e1 | 80 | |
1ddb263d LP |
81 | while ((i = hashmap_steal_first(m->image_cache))) |
82 | image_unref(i); | |
83 | ||
84 | hashmap_free(m->image_cache); | |
85 | ||
86 | sd_event_source_unref(m->image_cache_defer_event); | |
87 | ||
d04c1fb8 LP |
88 | bus_verify_polkit_async_registry_free(m->polkit_registry); |
89 | ||
c3350683 LP |
90 | sd_bus_unref(m->bus); |
91 | sd_event_unref(m->event); | |
92 | ||
93 | free(m); | |
94 | } | |
95 | ||
fbe55073 LP |
96 | static int manager_add_host_machine(Manager *m) { |
97 | _cleanup_free_ char *rd = NULL, *unit = NULL; | |
98 | sd_id128_t mid; | |
99 | Machine *t; | |
100 | int r; | |
101 | ||
102 | if (m->host_machine) | |
103 | return 0; | |
104 | ||
105 | r = sd_id128_get_machine(&mid); | |
106 | if (r < 0) | |
107 | return log_error_errno(r, "Failed to get machine ID: %m"); | |
108 | ||
109 | rd = strdup("/"); | |
110 | if (!rd) | |
111 | return log_oom(); | |
112 | ||
113 | unit = strdup("-.slice"); | |
114 | if (!unit) | |
115 | return log_oom(); | |
116 | ||
117 | t = machine_new(m, MACHINE_HOST, ".host"); | |
118 | if (!t) | |
119 | return log_oom(); | |
120 | ||
121 | t->leader = 1; | |
122 | t->id = mid; | |
123 | ||
124 | t->root_directory = rd; | |
125 | t->unit = unit; | |
126 | rd = unit = NULL; | |
127 | ||
128 | dual_timestamp_from_boottime_or_monotonic(&t->timestamp, 0); | |
129 | ||
130 | m->host_machine = t; | |
131 | ||
132 | return 0; | |
133 | } | |
134 | ||
1ee306e1 LP |
135 | int manager_enumerate_machines(Manager *m) { |
136 | _cleanup_closedir_ DIR *d = NULL; | |
137 | struct dirent *de; | |
138 | int r = 0; | |
139 | ||
140 | assert(m); | |
141 | ||
fbe55073 LP |
142 | r = manager_add_host_machine(m); |
143 | if (r < 0) | |
144 | return r; | |
145 | ||
1ee306e1 LP |
146 | /* Read in machine data stored on disk */ |
147 | d = opendir("/run/systemd/machines"); | |
148 | if (!d) { | |
149 | if (errno == ENOENT) | |
150 | return 0; | |
151 | ||
56f64d95 | 152 | log_error_errno(errno, "Failed to open /run/systemd/machines: %m"); |
1ee306e1 LP |
153 | return -errno; |
154 | } | |
155 | ||
156 | FOREACH_DIRENT(de, d, return -errno) { | |
157 | struct Machine *machine; | |
158 | int k; | |
159 | ||
160 | if (!dirent_is_file(de)) | |
161 | continue; | |
162 | ||
b87633c4 LP |
163 | /* Ignore symlinks that map the unit name to the machine */ |
164 | if (startswith(de->d_name, "unit:")) | |
165 | continue; | |
166 | ||
b9a8d250 LP |
167 | if (!machine_name_is_valid(de->d_name)) |
168 | continue; | |
169 | ||
1ee306e1 LP |
170 | k = manager_add_machine(m, de->d_name, &machine); |
171 | if (k < 0) { | |
fbe55073 | 172 | r = log_error_errno(k, "Failed to add machine by file name %s: %m", de->d_name); |
1ee306e1 LP |
173 | continue; |
174 | } | |
175 | ||
176 | machine_add_to_gc_queue(machine); | |
177 | ||
178 | k = machine_load(machine); | |
179 | if (k < 0) | |
180 | r = k; | |
181 | } | |
182 | ||
183 | return r; | |
184 | } | |
185 | ||
1ee306e1 | 186 | static int manager_connect_bus(Manager *m) { |
c3350683 | 187 | _cleanup_bus_error_free_ sd_bus_error error = SD_BUS_ERROR_NULL; |
1ee306e1 | 188 | int r; |
1ee306e1 LP |
189 | |
190 | assert(m); | |
191 | assert(!m->bus); | |
1ee306e1 | 192 | |
76b54375 | 193 | r = sd_bus_default_system(&m->bus); |
f647962d MS |
194 | if (r < 0) |
195 | return log_error_errno(r, "Failed to connect to system bus: %m"); | |
1ee306e1 | 196 | |
19befb2d | 197 | r = sd_bus_add_object_vtable(m->bus, NULL, "/org/freedesktop/machine1", "org.freedesktop.machine1.Manager", manager_vtable, m); |
f647962d MS |
198 | if (r < 0) |
199 | return log_error_errno(r, "Failed to add manager object vtable: %m"); | |
1ee306e1 | 200 | |
19befb2d | 201 | 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 |
202 | if (r < 0) |
203 | return log_error_errno(r, "Failed to add machine object vtable: %m"); | |
c3350683 | 204 | |
19befb2d | 205 | r = sd_bus_add_node_enumerator(m->bus, NULL, "/org/freedesktop/machine1/machine", machine_node_enumerator, m); |
f647962d MS |
206 | if (r < 0) |
207 | return log_error_errno(r, "Failed to add machine enumerator: %m"); | |
1ee306e1 | 208 | |
ebeccf9e LP |
209 | r = sd_bus_add_fallback_vtable(m->bus, NULL, "/org/freedesktop/machine1/image", "org.freedesktop.machine1.Image", image_vtable, image_object_find, m); |
210 | if (r < 0) | |
211 | return log_error_errno(r, "Failed to add image object vtable: %m"); | |
212 | ||
213 | r = sd_bus_add_node_enumerator(m->bus, NULL, "/org/freedesktop/machine1/image", image_node_enumerator, m); | |
214 | if (r < 0) | |
215 | return log_error_errno(r, "Failed to add image enumerator: %m"); | |
216 | ||
c3350683 | 217 | r = sd_bus_add_match(m->bus, |
19befb2d | 218 | NULL, |
c3350683 LP |
219 | "type='signal'," |
220 | "sender='org.freedesktop.systemd1'," | |
221 | "interface='org.freedesktop.systemd1.Manager'," | |
222 | "member='JobRemoved'," | |
223 | "path='/org/freedesktop/systemd1'", | |
224 | match_job_removed, | |
225 | m); | |
f647962d MS |
226 | if (r < 0) |
227 | return log_error_errno(r, "Failed to add match for JobRemoved: %m"); | |
1ee306e1 | 228 | |
c3350683 | 229 | r = sd_bus_add_match(m->bus, |
19befb2d | 230 | NULL, |
c3350683 LP |
231 | "type='signal'," |
232 | "sender='org.freedesktop.systemd1'," | |
233 | "interface='org.freedesktop.systemd1.Manager'," | |
234 | "member='UnitRemoved'," | |
235 | "path='/org/freedesktop/systemd1'", | |
236 | match_unit_removed, | |
237 | m); | |
f647962d MS |
238 | if (r < 0) |
239 | return log_error_errno(r, "Failed to add match for UnitRemoved: %m"); | |
943aca8e | 240 | |
c3350683 | 241 | r = sd_bus_add_match(m->bus, |
19befb2d | 242 | NULL, |
c3350683 LP |
243 | "type='signal'," |
244 | "sender='org.freedesktop.systemd1'," | |
245 | "interface='org.freedesktop.DBus.Properties'," | |
11b90e69 LP |
246 | "member='PropertiesChanged'," |
247 | "arg0='org.freedesktop.systemd1.Unit'", | |
c3350683 LP |
248 | match_properties_changed, |
249 | m); | |
f647962d MS |
250 | if (r < 0) |
251 | return log_error_errno(r, "Failed to add match for PropertiesChanged: %m"); | |
1ee306e1 | 252 | |
c3350683 | 253 | r = sd_bus_add_match(m->bus, |
19befb2d | 254 | NULL, |
c3350683 LP |
255 | "type='signal'," |
256 | "sender='org.freedesktop.systemd1'," | |
257 | "interface='org.freedesktop.systemd1.Manager'," | |
258 | "member='Reloading'," | |
259 | "path='/org/freedesktop/systemd1'", | |
260 | match_reloading, | |
261 | m); | |
f647962d MS |
262 | if (r < 0) |
263 | return log_error_errno(r, "Failed to add match for Reloading: %m"); | |
6797c324 | 264 | |
c3350683 | 265 | r = sd_bus_call_method( |
1ee306e1 LP |
266 | m->bus, |
267 | "org.freedesktop.systemd1", | |
268 | "/org/freedesktop/systemd1", | |
269 | "org.freedesktop.systemd1.Manager", | |
270 | "Subscribe", | |
1ee306e1 | 271 | &error, |
c3350683 | 272 | NULL, NULL); |
1ee306e1 | 273 | if (r < 0) { |
c3350683 LP |
274 | log_error("Failed to enable subscription: %s", bus_error_message(&error, r)); |
275 | return r; | |
1ee306e1 LP |
276 | } |
277 | ||
5bb658a1 | 278 | r = sd_bus_request_name(m->bus, "org.freedesktop.machine1", 0); |
f647962d MS |
279 | if (r < 0) |
280 | return log_error_errno(r, "Failed to register name: %m"); | |
1ee306e1 | 281 | |
c3350683 | 282 | r = sd_bus_attach_event(m->bus, m->event, 0); |
f647962d MS |
283 | if (r < 0) |
284 | return log_error_errno(r, "Failed to attach bus to event loop: %m"); | |
1ee306e1 | 285 | |
1ee306e1 | 286 | return 0; |
1ee306e1 LP |
287 | } |
288 | ||
289 | void manager_gc(Manager *m, bool drop_not_started) { | |
290 | Machine *machine; | |
291 | ||
292 | assert(m); | |
293 | ||
294 | while ((machine = m->machine_gc_queue)) { | |
71fda00f | 295 | LIST_REMOVE(gc_queue, m->machine_gc_queue, machine); |
1ee306e1 LP |
296 | machine->in_gc_queue = false; |
297 | ||
49f3fffd LP |
298 | /* First, if we are not closing yet, initiate stopping */ |
299 | if (!machine_check_gc(machine, drop_not_started) && | |
300 | machine_get_state(machine) != MACHINE_CLOSING) | |
1ee306e1 | 301 | machine_stop(machine); |
49f3fffd LP |
302 | |
303 | /* Now, the stop stop probably made this referenced | |
304 | * again, but if it didn't, then it's time to let it | |
305 | * go entirely. */ | |
306 | if (!machine_check_gc(machine, drop_not_started)) { | |
307 | machine_finalize(machine); | |
1ee306e1 LP |
308 | machine_free(machine); |
309 | } | |
310 | } | |
311 | } | |
312 | ||
313 | int manager_startup(Manager *m) { | |
1ee306e1 LP |
314 | Machine *machine; |
315 | Iterator i; | |
c3350683 | 316 | int r; |
1ee306e1 LP |
317 | |
318 | assert(m); | |
1ee306e1 LP |
319 | |
320 | /* Connect to the bus */ | |
321 | r = manager_connect_bus(m); | |
322 | if (r < 0) | |
323 | return r; | |
324 | ||
325 | /* Deserialize state */ | |
326 | manager_enumerate_machines(m); | |
327 | ||
328 | /* Remove stale objects before we start them */ | |
329 | manager_gc(m, false); | |
330 | ||
331 | /* And start everything */ | |
332 | HASHMAP_FOREACH(machine, m->machines, i) | |
c3350683 | 333 | machine_start(machine, NULL, NULL); |
1ee306e1 LP |
334 | |
335 | return 0; | |
336 | } | |
337 | ||
d9e34bfd LP |
338 | static bool check_idle(void *userdata) { |
339 | Manager *m = userdata; | |
1ee306e1 | 340 | |
d9e34bfd | 341 | manager_gc(m, true); |
1ee306e1 | 342 | |
d9e34bfd LP |
343 | return hashmap_isempty(m->machines); |
344 | } | |
1ee306e1 | 345 | |
d9e34bfd LP |
346 | int manager_run(Manager *m) { |
347 | assert(m); | |
1ee306e1 | 348 | |
d9e34bfd LP |
349 | return bus_event_loop_with_idle( |
350 | m->event, | |
351 | m->bus, | |
352 | "org.freedesktop.machine1", | |
353 | DEFAULT_EXIT_USEC, | |
354 | check_idle, m); | |
1ee306e1 LP |
355 | } |
356 | ||
357 | int main(int argc, char *argv[]) { | |
358 | Manager *m = NULL; | |
359 | int r; | |
360 | ||
361 | log_set_target(LOG_TARGET_AUTO); | |
362 | log_set_facility(LOG_AUTH); | |
363 | log_parse_environment(); | |
364 | log_open(); | |
365 | ||
366 | umask(0022); | |
367 | ||
368 | if (argc != 1) { | |
369 | log_error("This program takes no arguments."); | |
370 | r = -EINVAL; | |
371 | goto finish; | |
372 | } | |
373 | ||
374 | /* Always create the directories people can create inotify | |
375 | * watches in. Note that some applications might check for the | |
c3350683 LP |
376 | * existence of /run/systemd/machines/ to determine whether |
377 | * machined is available, so please always make sure this | |
378 | * check stays in. */ | |
1ee306e1 LP |
379 | mkdir_label("/run/systemd/machines", 0755); |
380 | ||
72c0a2c2 | 381 | assert_se(sigprocmask_many(SIG_BLOCK, NULL, SIGCHLD, -1) >= 0); |
0370612e | 382 | |
1ee306e1 LP |
383 | m = manager_new(); |
384 | if (!m) { | |
385 | r = log_oom(); | |
386 | goto finish; | |
387 | } | |
388 | ||
389 | r = manager_startup(m); | |
390 | if (r < 0) { | |
da927ba9 | 391 | log_error_errno(r, "Failed to fully start up daemon: %m"); |
1ee306e1 LP |
392 | goto finish; |
393 | } | |
394 | ||
de0671ee | 395 | log_debug("systemd-machined running as pid "PID_FMT, getpid()); |
1ee306e1 LP |
396 | |
397 | sd_notify(false, | |
398 | "READY=1\n" | |
399 | "STATUS=Processing requests..."); | |
400 | ||
401 | r = manager_run(m); | |
402 | ||
de0671ee | 403 | log_debug("systemd-machined stopped as pid "PID_FMT, getpid()); |
1ee306e1 LP |
404 | |
405 | finish: | |
3e044c49 | 406 | manager_free(m); |
1ee306e1 LP |
407 | |
408 | return r < 0 ? EXIT_FAILURE : EXIT_SUCCESS; | |
409 | } |