]>
Commit | Line | Data |
---|---|---|
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> | |
23 | #include <pwd.h> | |
24 | #include <fcntl.h> | |
25 | #include <string.h> | |
26 | #include <unistd.h> | |
27 | #include <sys/epoll.h> | |
28 | ||
c3350683 | 29 | #include "sd-daemon.h" |
1ee306e1 | 30 | |
1ee306e1 LP |
31 | #include "strv.h" |
32 | #include "conf-parser.h" | |
c3350683 | 33 | #include "cgroup-util.h" |
1ee306e1 | 34 | #include "mkdir.h" |
c3350683 LP |
35 | #include "bus-util.h" |
36 | #include "bus-error.h" | |
37 | #include "machined.h" | |
1ee306e1 LP |
38 | |
39 | Manager *manager_new(void) { | |
40 | Manager *m; | |
c3350683 | 41 | int r; |
1ee306e1 LP |
42 | |
43 | m = new0(Manager, 1); | |
44 | if (!m) | |
45 | return NULL; | |
46 | ||
d5099efc MS |
47 | m->machines = hashmap_new(&string_hash_ops); |
48 | m->machine_units = hashmap_new(&string_hash_ops); | |
49 | m->machine_leaders = hashmap_new(NULL); | |
1ee306e1 | 50 | |
d3e84ddb | 51 | if (!m->machines || !m->machine_units || !m->machine_leaders) { |
c3350683 LP |
52 | manager_free(m); |
53 | return NULL; | |
54 | } | |
55 | ||
afc6adb5 | 56 | r = sd_event_default(&m->event); |
a658cafa | 57 | if (r < 0) { |
1ee306e1 LP |
58 | manager_free(m); |
59 | return NULL; | |
60 | } | |
61 | ||
cde93897 LP |
62 | sd_event_set_watchdog(m->event, true); |
63 | ||
1ee306e1 LP |
64 | return m; |
65 | } | |
66 | ||
67 | void manager_free(Manager *m) { | |
68 | Machine *machine; | |
69 | ||
70 | assert(m); | |
71 | ||
72 | while ((machine = hashmap_first(m->machines))) | |
73 | machine_free(machine); | |
74 | ||
75 | hashmap_free(m->machines); | |
76 | hashmap_free(m->machine_units); | |
d3e84ddb | 77 | hashmap_free(m->machine_leaders); |
1ee306e1 | 78 | |
c3350683 LP |
79 | sd_bus_unref(m->bus); |
80 | sd_event_unref(m->event); | |
81 | ||
82 | free(m); | |
83 | } | |
84 | ||
1ee306e1 LP |
85 | int manager_enumerate_machines(Manager *m) { |
86 | _cleanup_closedir_ DIR *d = NULL; | |
87 | struct dirent *de; | |
88 | int r = 0; | |
89 | ||
90 | assert(m); | |
91 | ||
92 | /* Read in machine data stored on disk */ | |
93 | d = opendir("/run/systemd/machines"); | |
94 | if (!d) { | |
95 | if (errno == ENOENT) | |
96 | return 0; | |
97 | ||
98 | log_error("Failed to open /run/systemd/machines: %m"); | |
99 | return -errno; | |
100 | } | |
101 | ||
102 | FOREACH_DIRENT(de, d, return -errno) { | |
103 | struct Machine *machine; | |
104 | int k; | |
105 | ||
106 | if (!dirent_is_file(de)) | |
107 | continue; | |
108 | ||
b87633c4 LP |
109 | /* Ignore symlinks that map the unit name to the machine */ |
110 | if (startswith(de->d_name, "unit:")) | |
111 | continue; | |
112 | ||
1ee306e1 LP |
113 | k = manager_add_machine(m, de->d_name, &machine); |
114 | if (k < 0) { | |
115 | log_error("Failed to add machine by file name %s: %s", de->d_name, strerror(-k)); | |
116 | ||
117 | r = k; | |
118 | continue; | |
119 | } | |
120 | ||
121 | machine_add_to_gc_queue(machine); | |
122 | ||
123 | k = machine_load(machine); | |
124 | if (k < 0) | |
125 | r = k; | |
126 | } | |
127 | ||
128 | return r; | |
129 | } | |
130 | ||
1ee306e1 | 131 | static int manager_connect_bus(Manager *m) { |
c3350683 | 132 | _cleanup_bus_error_free_ sd_bus_error error = SD_BUS_ERROR_NULL; |
1ee306e1 | 133 | int r; |
1ee306e1 LP |
134 | |
135 | assert(m); | |
136 | assert(!m->bus); | |
1ee306e1 | 137 | |
76b54375 | 138 | r = sd_bus_default_system(&m->bus); |
c3350683 LP |
139 | if (r < 0) { |
140 | log_error("Failed to connect to system bus: %s", strerror(-r)); | |
141 | return r; | |
142 | } | |
1ee306e1 | 143 | |
19befb2d | 144 | r = sd_bus_add_object_vtable(m->bus, NULL, "/org/freedesktop/machine1", "org.freedesktop.machine1.Manager", manager_vtable, m); |
c3350683 LP |
145 | if (r < 0) { |
146 | log_error("Failed to add manager object vtable: %s", strerror(-r)); | |
147 | return r; | |
1ee306e1 LP |
148 | } |
149 | ||
19befb2d | 150 | r = sd_bus_add_fallback_vtable(m->bus, NULL, "/org/freedesktop/machine1/machine", "org.freedesktop.machine1.Machine", machine_vtable, machine_object_find, m); |
c3350683 LP |
151 | if (r < 0) { |
152 | log_error("Failed to add machine object vtable: %s", strerror(-r)); | |
153 | return r; | |
154 | } | |
155 | ||
19befb2d | 156 | r = sd_bus_add_node_enumerator(m->bus, NULL, "/org/freedesktop/machine1/machine", machine_node_enumerator, m); |
c3350683 LP |
157 | if (r < 0) { |
158 | log_error("Failed to add machine enumerator: %s", strerror(-r)); | |
159 | return r; | |
1ee306e1 LP |
160 | } |
161 | ||
c3350683 | 162 | r = sd_bus_add_match(m->bus, |
19befb2d | 163 | NULL, |
c3350683 LP |
164 | "type='signal'," |
165 | "sender='org.freedesktop.systemd1'," | |
166 | "interface='org.freedesktop.systemd1.Manager'," | |
167 | "member='JobRemoved'," | |
168 | "path='/org/freedesktop/systemd1'", | |
169 | match_job_removed, | |
170 | m); | |
171 | if (r < 0) { | |
172 | log_error("Failed to add match for JobRemoved: %s", strerror(-r)); | |
173 | return r; | |
1ee306e1 LP |
174 | } |
175 | ||
c3350683 | 176 | r = sd_bus_add_match(m->bus, |
19befb2d | 177 | NULL, |
c3350683 LP |
178 | "type='signal'," |
179 | "sender='org.freedesktop.systemd1'," | |
180 | "interface='org.freedesktop.systemd1.Manager'," | |
181 | "member='UnitRemoved'," | |
182 | "path='/org/freedesktop/systemd1'", | |
183 | match_unit_removed, | |
184 | m); | |
185 | if (r < 0) { | |
186 | log_error("Failed to add match for UnitRemoved: %s", strerror(-r)); | |
187 | return r; | |
943aca8e LP |
188 | } |
189 | ||
c3350683 | 190 | r = sd_bus_add_match(m->bus, |
19befb2d | 191 | NULL, |
c3350683 LP |
192 | "type='signal'," |
193 | "sender='org.freedesktop.systemd1'," | |
194 | "interface='org.freedesktop.DBus.Properties'," | |
195 | "member='PropertiesChanged'", | |
196 | match_properties_changed, | |
197 | m); | |
198 | if (r < 0) { | |
199 | log_error("Failed to add match for PropertiesChanged: %s", strerror(-r)); | |
200 | return r; | |
1ee306e1 LP |
201 | } |
202 | ||
c3350683 | 203 | r = sd_bus_add_match(m->bus, |
19befb2d | 204 | NULL, |
c3350683 LP |
205 | "type='signal'," |
206 | "sender='org.freedesktop.systemd1'," | |
207 | "interface='org.freedesktop.systemd1.Manager'," | |
208 | "member='Reloading'," | |
209 | "path='/org/freedesktop/systemd1'", | |
210 | match_reloading, | |
211 | m); | |
212 | if (r < 0) { | |
213 | log_error("Failed to add match for Reloading: %s", strerror(-r)); | |
214 | return r; | |
6797c324 LP |
215 | } |
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); |
c3350683 LP |
231 | if (r < 0) { |
232 | log_error("Failed to register name: %s", strerror(-r)); | |
233 | return r; | |
1ee306e1 LP |
234 | } |
235 | ||
c3350683 LP |
236 | r = sd_bus_attach_event(m->bus, m->event, 0); |
237 | if (r < 0) { | |
238 | log_error("Failed to attach bus to event loop: %s", strerror(-r)); | |
239 | return r; | |
1ee306e1 LP |
240 | } |
241 | ||
1ee306e1 | 242 | return 0; |
1ee306e1 LP |
243 | } |
244 | ||
245 | void manager_gc(Manager *m, bool drop_not_started) { | |
246 | Machine *machine; | |
247 | ||
248 | assert(m); | |
249 | ||
250 | while ((machine = m->machine_gc_queue)) { | |
71fda00f | 251 | LIST_REMOVE(gc_queue, m->machine_gc_queue, machine); |
1ee306e1 LP |
252 | machine->in_gc_queue = false; |
253 | ||
a658cafa | 254 | if (!machine_check_gc(machine, drop_not_started)) { |
1ee306e1 LP |
255 | machine_stop(machine); |
256 | machine_free(machine); | |
257 | } | |
258 | } | |
259 | } | |
260 | ||
261 | int manager_startup(Manager *m) { | |
1ee306e1 LP |
262 | Machine *machine; |
263 | Iterator i; | |
c3350683 | 264 | int r; |
1ee306e1 LP |
265 | |
266 | assert(m); | |
1ee306e1 LP |
267 | |
268 | /* Connect to the bus */ | |
269 | r = manager_connect_bus(m); | |
270 | if (r < 0) | |
271 | return r; | |
272 | ||
273 | /* Deserialize state */ | |
274 | manager_enumerate_machines(m); | |
275 | ||
276 | /* Remove stale objects before we start them */ | |
277 | manager_gc(m, false); | |
278 | ||
279 | /* And start everything */ | |
280 | HASHMAP_FOREACH(machine, m->machines, i) | |
c3350683 | 281 | machine_start(machine, NULL, NULL); |
1ee306e1 LP |
282 | |
283 | return 0; | |
284 | } | |
285 | ||
d9e34bfd LP |
286 | static bool check_idle(void *userdata) { |
287 | Manager *m = userdata; | |
1ee306e1 | 288 | |
d9e34bfd | 289 | manager_gc(m, true); |
1ee306e1 | 290 | |
d9e34bfd LP |
291 | return hashmap_isempty(m->machines); |
292 | } | |
1ee306e1 | 293 | |
d9e34bfd LP |
294 | int manager_run(Manager *m) { |
295 | assert(m); | |
1ee306e1 | 296 | |
d9e34bfd LP |
297 | return bus_event_loop_with_idle( |
298 | m->event, | |
299 | m->bus, | |
300 | "org.freedesktop.machine1", | |
301 | DEFAULT_EXIT_USEC, | |
302 | check_idle, m); | |
1ee306e1 LP |
303 | } |
304 | ||
305 | int main(int argc, char *argv[]) { | |
306 | Manager *m = NULL; | |
307 | int r; | |
308 | ||
309 | log_set_target(LOG_TARGET_AUTO); | |
310 | log_set_facility(LOG_AUTH); | |
311 | log_parse_environment(); | |
312 | log_open(); | |
313 | ||
314 | umask(0022); | |
315 | ||
316 | if (argc != 1) { | |
317 | log_error("This program takes no arguments."); | |
318 | r = -EINVAL; | |
319 | goto finish; | |
320 | } | |
321 | ||
322 | /* Always create the directories people can create inotify | |
323 | * watches in. Note that some applications might check for the | |
c3350683 LP |
324 | * existence of /run/systemd/machines/ to determine whether |
325 | * machined is available, so please always make sure this | |
326 | * check stays in. */ | |
1ee306e1 LP |
327 | mkdir_label("/run/systemd/machines", 0755); |
328 | ||
329 | m = manager_new(); | |
330 | if (!m) { | |
331 | r = log_oom(); | |
332 | goto finish; | |
333 | } | |
334 | ||
335 | r = manager_startup(m); | |
336 | if (r < 0) { | |
337 | log_error("Failed to fully start up daemon: %s", strerror(-r)); | |
338 | goto finish; | |
339 | } | |
340 | ||
de0671ee | 341 | log_debug("systemd-machined running as pid "PID_FMT, getpid()); |
1ee306e1 LP |
342 | |
343 | sd_notify(false, | |
344 | "READY=1\n" | |
345 | "STATUS=Processing requests..."); | |
346 | ||
347 | r = manager_run(m); | |
348 | ||
de0671ee | 349 | log_debug("systemd-machined stopped as pid "PID_FMT, getpid()); |
1ee306e1 LP |
350 | |
351 | finish: | |
1ee306e1 LP |
352 | if (m) |
353 | manager_free(m); | |
354 | ||
355 | return r < 0 ? EXIT_FAILURE : EXIT_SUCCESS; | |
356 | } |