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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> | |
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 | ||
1ee306e1 LP |
47 | m->machines = hashmap_new(string_hash_func, string_compare_func); |
48 | m->machine_units = hashmap_new(string_hash_func, string_compare_func); | |
d3e84ddb | 49 | m->machine_leaders = hashmap_new(trivial_hash_func, trivial_compare_func); |
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 | |
c3350683 LP |
144 | r = sd_bus_add_object_vtable(m->bus, "/org/freedesktop/machine1", "org.freedesktop.machine1.Manager", manager_vtable, m); |
145 | if (r < 0) { | |
146 | log_error("Failed to add manager object vtable: %s", strerror(-r)); | |
147 | return r; | |
1ee306e1 LP |
148 | } |
149 | ||
c3350683 LP |
150 | r = sd_bus_add_fallback_vtable(m->bus, "/org/freedesktop/machine1/machine", "org.freedesktop.machine1.Machine", machine_vtable, machine_object_find, m); |
151 | if (r < 0) { | |
152 | log_error("Failed to add machine object vtable: %s", strerror(-r)); | |
153 | return r; | |
154 | } | |
155 | ||
156 | r = sd_bus_add_node_enumerator(m->bus, "/org/freedesktop/machine1/machine", machine_node_enumerator, m); | |
157 | if (r < 0) { | |
158 | log_error("Failed to add machine enumerator: %s", strerror(-r)); | |
159 | return r; | |
1ee306e1 LP |
160 | } |
161 | ||
c3350683 LP |
162 | r = sd_bus_add_match(m->bus, |
163 | "type='signal'," | |
164 | "sender='org.freedesktop.systemd1'," | |
165 | "interface='org.freedesktop.systemd1.Manager'," | |
166 | "member='JobRemoved'," | |
167 | "path='/org/freedesktop/systemd1'", | |
168 | match_job_removed, | |
169 | m); | |
170 | if (r < 0) { | |
171 | log_error("Failed to add match for JobRemoved: %s", strerror(-r)); | |
172 | return r; | |
1ee306e1 LP |
173 | } |
174 | ||
c3350683 LP |
175 | r = sd_bus_add_match(m->bus, |
176 | "type='signal'," | |
177 | "sender='org.freedesktop.systemd1'," | |
178 | "interface='org.freedesktop.systemd1.Manager'," | |
179 | "member='UnitRemoved'," | |
180 | "path='/org/freedesktop/systemd1'", | |
181 | match_unit_removed, | |
182 | m); | |
183 | if (r < 0) { | |
184 | log_error("Failed to add match for UnitRemoved: %s", strerror(-r)); | |
185 | return r; | |
943aca8e LP |
186 | } |
187 | ||
c3350683 LP |
188 | r = sd_bus_add_match(m->bus, |
189 | "type='signal'," | |
190 | "sender='org.freedesktop.systemd1'," | |
191 | "interface='org.freedesktop.DBus.Properties'," | |
192 | "member='PropertiesChanged'", | |
193 | match_properties_changed, | |
194 | m); | |
195 | if (r < 0) { | |
196 | log_error("Failed to add match for PropertiesChanged: %s", strerror(-r)); | |
197 | return r; | |
1ee306e1 LP |
198 | } |
199 | ||
c3350683 LP |
200 | r = sd_bus_add_match(m->bus, |
201 | "type='signal'," | |
202 | "sender='org.freedesktop.systemd1'," | |
203 | "interface='org.freedesktop.systemd1.Manager'," | |
204 | "member='Reloading'," | |
205 | "path='/org/freedesktop/systemd1'", | |
206 | match_reloading, | |
207 | m); | |
208 | if (r < 0) { | |
209 | log_error("Failed to add match for Reloading: %s", strerror(-r)); | |
210 | return r; | |
6797c324 LP |
211 | } |
212 | ||
c3350683 | 213 | r = sd_bus_call_method( |
1ee306e1 LP |
214 | m->bus, |
215 | "org.freedesktop.systemd1", | |
216 | "/org/freedesktop/systemd1", | |
217 | "org.freedesktop.systemd1.Manager", | |
218 | "Subscribe", | |
1ee306e1 | 219 | &error, |
c3350683 | 220 | NULL, NULL); |
1ee306e1 | 221 | if (r < 0) { |
c3350683 LP |
222 | log_error("Failed to enable subscription: %s", bus_error_message(&error, r)); |
223 | return r; | |
1ee306e1 LP |
224 | } |
225 | ||
5bb658a1 | 226 | r = sd_bus_request_name(m->bus, "org.freedesktop.machine1", 0); |
c3350683 LP |
227 | if (r < 0) { |
228 | log_error("Failed to register name: %s", strerror(-r)); | |
229 | return r; | |
1ee306e1 LP |
230 | } |
231 | ||
c3350683 LP |
232 | r = sd_bus_attach_event(m->bus, m->event, 0); |
233 | if (r < 0) { | |
234 | log_error("Failed to attach bus to event loop: %s", strerror(-r)); | |
235 | return r; | |
1ee306e1 LP |
236 | } |
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 | ||
325 | m = manager_new(); | |
326 | if (!m) { | |
327 | r = log_oom(); | |
328 | goto finish; | |
329 | } | |
330 | ||
331 | r = manager_startup(m); | |
332 | if (r < 0) { | |
333 | log_error("Failed to fully start up daemon: %s", strerror(-r)); | |
334 | goto finish; | |
335 | } | |
336 | ||
337 | log_debug("systemd-machined running as pid %lu", (unsigned long) getpid()); | |
338 | ||
339 | sd_notify(false, | |
340 | "READY=1\n" | |
341 | "STATUS=Processing requests..."); | |
342 | ||
343 | r = manager_run(m); | |
344 | ||
345 | log_debug("systemd-machined stopped as pid %lu", (unsigned long) getpid()); | |
346 | ||
347 | finish: | |
348 | sd_notify(false, | |
349 | "STATUS=Shutting down..."); | |
350 | ||
351 | if (m) | |
352 | manager_free(m); | |
353 | ||
354 | return r < 0 ? EXIT_FAILURE : EXIT_SUCCESS; | |
355 | } |