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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" |
c3350683 | 27 | #include "cgroup-util.h" |
c3350683 LP |
28 | #include "bus-util.h" |
29 | #include "bus-error.h" | |
c34255bd | 30 | #include "label.h" |
24882e06 LP |
31 | #include "formats-util.h" |
32 | #include "signal-util.h" | |
1ddb263d | 33 | #include "machine-image.h" |
ebeccf9e | 34 | #include "machined.h" |
1ee306e1 LP |
35 | |
36 | Manager *manager_new(void) { | |
37 | Manager *m; | |
c3350683 | 38 | int r; |
1ee306e1 LP |
39 | |
40 | m = new0(Manager, 1); | |
41 | if (!m) | |
42 | return NULL; | |
43 | ||
d5099efc MS |
44 | m->machines = hashmap_new(&string_hash_ops); |
45 | m->machine_units = hashmap_new(&string_hash_ops); | |
46 | m->machine_leaders = hashmap_new(NULL); | |
1ee306e1 | 47 | |
d3e84ddb | 48 | if (!m->machines || !m->machine_units || !m->machine_leaders) { |
c3350683 LP |
49 | manager_free(m); |
50 | return NULL; | |
51 | } | |
52 | ||
afc6adb5 | 53 | r = sd_event_default(&m->event); |
a658cafa | 54 | if (r < 0) { |
1ee306e1 LP |
55 | manager_free(m); |
56 | return NULL; | |
57 | } | |
58 | ||
cde93897 LP |
59 | sd_event_set_watchdog(m->event, true); |
60 | ||
1ee306e1 LP |
61 | return m; |
62 | } | |
63 | ||
64 | void manager_free(Manager *m) { | |
65 | Machine *machine; | |
1ddb263d | 66 | Image *i; |
1ee306e1 LP |
67 | |
68 | assert(m); | |
69 | ||
70 | while ((machine = hashmap_first(m->machines))) | |
71 | machine_free(machine); | |
72 | ||
73 | hashmap_free(m->machines); | |
74 | hashmap_free(m->machine_units); | |
d3e84ddb | 75 | hashmap_free(m->machine_leaders); |
1ee306e1 | 76 | |
1ddb263d LP |
77 | while ((i = hashmap_steal_first(m->image_cache))) |
78 | image_unref(i); | |
79 | ||
80 | hashmap_free(m->image_cache); | |
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 | ||
89 | free(m); | |
90 | } | |
91 | ||
1ee306e1 LP |
92 | int manager_enumerate_machines(Manager *m) { |
93 | _cleanup_closedir_ DIR *d = NULL; | |
94 | struct dirent *de; | |
95 | int r = 0; | |
96 | ||
97 | assert(m); | |
98 | ||
99 | /* Read in machine data stored on disk */ | |
100 | d = opendir("/run/systemd/machines"); | |
101 | if (!d) { | |
102 | if (errno == ENOENT) | |
103 | return 0; | |
104 | ||
56f64d95 | 105 | log_error_errno(errno, "Failed to open /run/systemd/machines: %m"); |
1ee306e1 LP |
106 | return -errno; |
107 | } | |
108 | ||
109 | FOREACH_DIRENT(de, d, return -errno) { | |
110 | struct Machine *machine; | |
111 | int k; | |
112 | ||
113 | if (!dirent_is_file(de)) | |
114 | continue; | |
115 | ||
b87633c4 LP |
116 | /* Ignore symlinks that map the unit name to the machine */ |
117 | if (startswith(de->d_name, "unit:")) | |
118 | continue; | |
119 | ||
1ee306e1 LP |
120 | k = manager_add_machine(m, de->d_name, &machine); |
121 | if (k < 0) { | |
da927ba9 | 122 | log_error_errno(k, "Failed to add machine by file name %s: %m", de->d_name); |
1ee306e1 LP |
123 | |
124 | r = k; | |
125 | continue; | |
126 | } | |
127 | ||
128 | machine_add_to_gc_queue(machine); | |
129 | ||
130 | k = machine_load(machine); | |
131 | if (k < 0) | |
132 | r = k; | |
133 | } | |
134 | ||
135 | return r; | |
136 | } | |
137 | ||
1ee306e1 | 138 | static int manager_connect_bus(Manager *m) { |
c3350683 | 139 | _cleanup_bus_error_free_ sd_bus_error error = SD_BUS_ERROR_NULL; |
1ee306e1 | 140 | int r; |
1ee306e1 LP |
141 | |
142 | assert(m); | |
143 | assert(!m->bus); | |
1ee306e1 | 144 | |
76b54375 | 145 | r = sd_bus_default_system(&m->bus); |
f647962d MS |
146 | if (r < 0) |
147 | return log_error_errno(r, "Failed to connect to system bus: %m"); | |
1ee306e1 | 148 | |
19befb2d | 149 | r = sd_bus_add_object_vtable(m->bus, NULL, "/org/freedesktop/machine1", "org.freedesktop.machine1.Manager", manager_vtable, m); |
f647962d MS |
150 | if (r < 0) |
151 | return log_error_errno(r, "Failed to add manager object vtable: %m"); | |
1ee306e1 | 152 | |
19befb2d | 153 | 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 |
154 | if (r < 0) |
155 | return log_error_errno(r, "Failed to add machine object vtable: %m"); | |
c3350683 | 156 | |
19befb2d | 157 | r = sd_bus_add_node_enumerator(m->bus, NULL, "/org/freedesktop/machine1/machine", machine_node_enumerator, m); |
f647962d MS |
158 | if (r < 0) |
159 | return log_error_errno(r, "Failed to add machine enumerator: %m"); | |
1ee306e1 | 160 | |
ebeccf9e LP |
161 | r = sd_bus_add_fallback_vtable(m->bus, NULL, "/org/freedesktop/machine1/image", "org.freedesktop.machine1.Image", image_vtable, image_object_find, m); |
162 | if (r < 0) | |
163 | return log_error_errno(r, "Failed to add image object vtable: %m"); | |
164 | ||
165 | r = sd_bus_add_node_enumerator(m->bus, NULL, "/org/freedesktop/machine1/image", image_node_enumerator, m); | |
166 | if (r < 0) | |
167 | return log_error_errno(r, "Failed to add image enumerator: %m"); | |
168 | ||
c3350683 | 169 | r = sd_bus_add_match(m->bus, |
19befb2d | 170 | NULL, |
c3350683 LP |
171 | "type='signal'," |
172 | "sender='org.freedesktop.systemd1'," | |
173 | "interface='org.freedesktop.systemd1.Manager'," | |
174 | "member='JobRemoved'," | |
175 | "path='/org/freedesktop/systemd1'", | |
176 | match_job_removed, | |
177 | m); | |
f647962d MS |
178 | if (r < 0) |
179 | return log_error_errno(r, "Failed to add match for JobRemoved: %m"); | |
1ee306e1 | 180 | |
c3350683 | 181 | r = sd_bus_add_match(m->bus, |
19befb2d | 182 | NULL, |
c3350683 LP |
183 | "type='signal'," |
184 | "sender='org.freedesktop.systemd1'," | |
185 | "interface='org.freedesktop.systemd1.Manager'," | |
186 | "member='UnitRemoved'," | |
187 | "path='/org/freedesktop/systemd1'", | |
188 | match_unit_removed, | |
189 | m); | |
f647962d MS |
190 | if (r < 0) |
191 | return log_error_errno(r, "Failed to add match for UnitRemoved: %m"); | |
943aca8e | 192 | |
c3350683 | 193 | r = sd_bus_add_match(m->bus, |
19befb2d | 194 | NULL, |
c3350683 LP |
195 | "type='signal'," |
196 | "sender='org.freedesktop.systemd1'," | |
197 | "interface='org.freedesktop.DBus.Properties'," | |
11b90e69 LP |
198 | "member='PropertiesChanged'," |
199 | "arg0='org.freedesktop.systemd1.Unit'", | |
c3350683 LP |
200 | match_properties_changed, |
201 | m); | |
f647962d MS |
202 | if (r < 0) |
203 | return log_error_errno(r, "Failed to add match for PropertiesChanged: %m"); | |
1ee306e1 | 204 | |
c3350683 | 205 | r = sd_bus_add_match(m->bus, |
19befb2d | 206 | NULL, |
c3350683 LP |
207 | "type='signal'," |
208 | "sender='org.freedesktop.systemd1'," | |
209 | "interface='org.freedesktop.systemd1.Manager'," | |
210 | "member='Reloading'," | |
211 | "path='/org/freedesktop/systemd1'", | |
212 | match_reloading, | |
213 | m); | |
f647962d MS |
214 | if (r < 0) |
215 | return log_error_errno(r, "Failed to add match for Reloading: %m"); | |
6797c324 | 216 | |
c3350683 | 217 | r = sd_bus_call_method( |
1ee306e1 LP |
218 | m->bus, |
219 | "org.freedesktop.systemd1", | |
220 | "/org/freedesktop/systemd1", | |
221 | "org.freedesktop.systemd1.Manager", | |
222 | "Subscribe", | |
1ee306e1 | 223 | &error, |
c3350683 | 224 | NULL, NULL); |
1ee306e1 | 225 | if (r < 0) { |
c3350683 LP |
226 | log_error("Failed to enable subscription: %s", bus_error_message(&error, r)); |
227 | return r; | |
1ee306e1 LP |
228 | } |
229 | ||
5bb658a1 | 230 | r = sd_bus_request_name(m->bus, "org.freedesktop.machine1", 0); |
f647962d MS |
231 | if (r < 0) |
232 | return log_error_errno(r, "Failed to register name: %m"); | |
1ee306e1 | 233 | |
c3350683 | 234 | r = sd_bus_attach_event(m->bus, m->event, 0); |
f647962d MS |
235 | if (r < 0) |
236 | return log_error_errno(r, "Failed to attach bus to event loop: %m"); | |
1ee306e1 | 237 | |
1ee306e1 | 238 | return 0; |
1ee306e1 LP |
239 | } |
240 | ||
241 | void manager_gc(Manager *m, bool drop_not_started) { | |
242 | Machine *machine; | |
243 | ||
244 | assert(m); | |
245 | ||
246 | while ((machine = m->machine_gc_queue)) { | |
71fda00f | 247 | LIST_REMOVE(gc_queue, m->machine_gc_queue, machine); |
1ee306e1 LP |
248 | machine->in_gc_queue = false; |
249 | ||
a658cafa | 250 | if (!machine_check_gc(machine, drop_not_started)) { |
1ee306e1 LP |
251 | machine_stop(machine); |
252 | machine_free(machine); | |
253 | } | |
254 | } | |
255 | } | |
256 | ||
257 | int manager_startup(Manager *m) { | |
1ee306e1 LP |
258 | Machine *machine; |
259 | Iterator i; | |
c3350683 | 260 | int r; |
1ee306e1 LP |
261 | |
262 | assert(m); | |
1ee306e1 LP |
263 | |
264 | /* Connect to the bus */ | |
265 | r = manager_connect_bus(m); | |
266 | if (r < 0) | |
267 | return r; | |
268 | ||
269 | /* Deserialize state */ | |
270 | manager_enumerate_machines(m); | |
271 | ||
272 | /* Remove stale objects before we start them */ | |
273 | manager_gc(m, false); | |
274 | ||
275 | /* And start everything */ | |
276 | HASHMAP_FOREACH(machine, m->machines, i) | |
c3350683 | 277 | machine_start(machine, NULL, NULL); |
1ee306e1 LP |
278 | |
279 | return 0; | |
280 | } | |
281 | ||
d9e34bfd LP |
282 | static bool check_idle(void *userdata) { |
283 | Manager *m = userdata; | |
1ee306e1 | 284 | |
d9e34bfd | 285 | manager_gc(m, true); |
1ee306e1 | 286 | |
d9e34bfd LP |
287 | return hashmap_isempty(m->machines); |
288 | } | |
1ee306e1 | 289 | |
d9e34bfd LP |
290 | int manager_run(Manager *m) { |
291 | assert(m); | |
1ee306e1 | 292 | |
d9e34bfd LP |
293 | return bus_event_loop_with_idle( |
294 | m->event, | |
295 | m->bus, | |
296 | "org.freedesktop.machine1", | |
297 | DEFAULT_EXIT_USEC, | |
298 | check_idle, m); | |
1ee306e1 LP |
299 | } |
300 | ||
301 | int main(int argc, char *argv[]) { | |
302 | Manager *m = NULL; | |
303 | int r; | |
304 | ||
305 | log_set_target(LOG_TARGET_AUTO); | |
306 | log_set_facility(LOG_AUTH); | |
307 | log_parse_environment(); | |
308 | log_open(); | |
309 | ||
310 | umask(0022); | |
311 | ||
312 | if (argc != 1) { | |
313 | log_error("This program takes no arguments."); | |
314 | r = -EINVAL; | |
315 | goto finish; | |
316 | } | |
317 | ||
318 | /* Always create the directories people can create inotify | |
319 | * watches in. Note that some applications might check for the | |
c3350683 LP |
320 | * existence of /run/systemd/machines/ to determine whether |
321 | * machined is available, so please always make sure this | |
322 | * check stays in. */ | |
1ee306e1 LP |
323 | mkdir_label("/run/systemd/machines", 0755); |
324 | ||
72c0a2c2 | 325 | assert_se(sigprocmask_many(SIG_BLOCK, NULL, SIGCHLD, -1) >= 0); |
0370612e | 326 | |
1ee306e1 LP |
327 | m = manager_new(); |
328 | if (!m) { | |
329 | r = log_oom(); | |
330 | goto finish; | |
331 | } | |
332 | ||
333 | r = manager_startup(m); | |
334 | if (r < 0) { | |
da927ba9 | 335 | log_error_errno(r, "Failed to fully start up daemon: %m"); |
1ee306e1 LP |
336 | goto finish; |
337 | } | |
338 | ||
de0671ee | 339 | log_debug("systemd-machined running as pid "PID_FMT, getpid()); |
1ee306e1 LP |
340 | |
341 | sd_notify(false, | |
342 | "READY=1\n" | |
343 | "STATUS=Processing requests..."); | |
344 | ||
345 | r = manager_run(m); | |
346 | ||
de0671ee | 347 | log_debug("systemd-machined stopped as pid "PID_FMT, getpid()); |
1ee306e1 LP |
348 | |
349 | finish: | |
1ee306e1 LP |
350 | if (m) |
351 | manager_free(m); | |
352 | ||
353 | return r < 0 ? EXIT_FAILURE : EXIT_SUCCESS; | |
354 | } |