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53e1b683 | 1 | /* SPDX-License-Identifier: LGPL-2.1+ */ |
1ee306e1 LP |
2 | |
3 | #include <errno.h> | |
1ee306e1 | 4 | #include <string.h> |
ca78ad1d ZJS |
5 | #include <sys/stat.h> |
6 | #include <sys/types.h> | |
1ee306e1 | 7 | #include <unistd.h> |
1ee306e1 | 8 | |
c3350683 | 9 | #include "sd-daemon.h" |
3ffd4af2 | 10 | |
b5efdb8a | 11 | #include "alloc-util.h" |
c3350683 | 12 | #include "bus-error.h" |
3ffd4af2 LP |
13 | #include "bus-util.h" |
14 | #include "cgroup-util.h" | |
a0956174 | 15 | #include "dirent-util.h" |
3ffd4af2 | 16 | #include "fd-util.h" |
f97b34a6 | 17 | #include "format-util.h" |
25300b5a | 18 | #include "hostname-util.h" |
3ffd4af2 | 19 | #include "label.h" |
1ddb263d | 20 | #include "machine-image.h" |
ebeccf9e | 21 | #include "machined.h" |
5e332028 | 22 | #include "main-func.h" |
df0ff127 | 23 | #include "process-util.h" |
3ffd4af2 | 24 | #include "signal-util.h" |
e5af6e0e | 25 | #include "special.h" |
1ee306e1 | 26 | |
730fa7ce LP |
27 | static Manager* manager_unref(Manager *m); |
28 | DEFINE_TRIVIAL_CLEANUP_FUNC(Manager*, manager_unref); | |
29 | ||
5be61bea | 30 | DEFINE_PRIVATE_HASH_OPS_WITH_VALUE_DESTRUCTOR(machine_hash_ops, char, string_hash_func, string_compare_func, Machine, machine_free); |
bb1a05d6 | 31 | |
730fa7ce LP |
32 | static int manager_new(Manager **ret) { |
33 | _cleanup_(manager_unrefp) Manager *m = NULL; | |
c3350683 | 34 | int r; |
1ee306e1 | 35 | |
730fa7ce LP |
36 | assert(ret); |
37 | ||
1ee306e1 LP |
38 | m = new0(Manager, 1); |
39 | if (!m) | |
730fa7ce | 40 | return -ENOMEM; |
1ee306e1 | 41 | |
5be61bea | 42 | m->machines = hashmap_new(&machine_hash_ops); |
d5099efc | 43 | m->machine_units = hashmap_new(&string_hash_ops); |
5be61bea | 44 | m->machine_leaders = hashmap_new(NULL); |
1ee306e1 | 45 | |
730fa7ce LP |
46 | if (!m->machines || !m->machine_units || !m->machine_leaders) |
47 | return -ENOMEM; | |
c3350683 | 48 | |
afc6adb5 | 49 | r = sd_event_default(&m->event); |
730fa7ce LP |
50 | if (r < 0) |
51 | return r; | |
52 | ||
53 | r = sd_event_add_signal(m->event, NULL, SIGINT, NULL, NULL); | |
54 | if (r < 0) | |
55 | return r; | |
56 | ||
57 | r = sd_event_add_signal(m->event, NULL, SIGTERM, NULL, NULL); | |
58 | if (r < 0) | |
59 | return r; | |
1ee306e1 | 60 | |
730fa7ce | 61 | (void) sd_event_set_watchdog(m->event, true); |
cde93897 | 62 | |
730fa7ce LP |
63 | *ret = TAKE_PTR(m); |
64 | return 0; | |
1ee306e1 LP |
65 | } |
66 | ||
730fa7ce | 67 | static Manager* manager_unref(Manager *m) { |
c8f05436 LP |
68 | if (!m) |
69 | return NULL; | |
1ee306e1 | 70 | |
56599585 LP |
71 | while (m->operations) |
72 | operation_free(m->operations); | |
73 | ||
74 | assert(m->n_operations == 0); | |
75 | ||
5be61bea | 76 | hashmap_free(m->machines); /* This will free all machines, so that the machine_units/machine_leaders is empty */ |
1ee306e1 | 77 | hashmap_free(m->machine_units); |
d3e84ddb | 78 | hashmap_free(m->machine_leaders); |
b07ec5a1 | 79 | hashmap_free(m->image_cache); |
1ddb263d LP |
80 | |
81 | sd_event_source_unref(m->image_cache_defer_event); | |
9fdcbae5 | 82 | sd_event_source_unref(m->nscd_cache_flush_event); |
1ddb263d | 83 | |
d04c1fb8 LP |
84 | bus_verify_polkit_async_registry_free(m->polkit_registry); |
85 | ||
92e31da1 | 86 | sd_bus_flush_close_unref(m->bus); |
c3350683 LP |
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 | ||
9b58b5ad | 348 | static int run(int argc, char *argv[]) { |
730fa7ce | 349 | _cleanup_(manager_unrefp) Manager *m = NULL; |
1ee306e1 LP |
350 | int r; |
351 | ||
1ee306e1 | 352 | log_set_facility(LOG_AUTH); |
6bf3c61c | 353 | log_setup_service(); |
1ee306e1 LP |
354 | |
355 | umask(0022); | |
356 | ||
357 | if (argc != 1) { | |
358 | log_error("This program takes no arguments."); | |
9b58b5ad | 359 | return -EINVAL; |
1ee306e1 LP |
360 | } |
361 | ||
730fa7ce LP |
362 | /* Always create the directories people can create inotify watches in. Note that some applications might check |
363 | * for the existence of /run/systemd/machines/ to determine whether machined is available, so please always | |
364 | * make sure this check stays in. */ | |
365 | (void) mkdir_label("/run/systemd/machines", 0755); | |
1ee306e1 | 366 | |
730fa7ce | 367 | assert_se(sigprocmask_many(SIG_BLOCK, NULL, SIGCHLD, SIGTERM, SIGINT, -1) >= 0); |
0370612e | 368 | |
730fa7ce | 369 | r = manager_new(&m); |
9b58b5ad ZJS |
370 | if (r < 0) |
371 | return log_error_errno(r, "Failed to allocate manager object: %m"); | |
1ee306e1 LP |
372 | |
373 | r = manager_startup(m); | |
9b58b5ad ZJS |
374 | if (r < 0) |
375 | return log_error_errno(r, "Failed to fully start up daemon: %m"); | |
1ee306e1 | 376 | |
df0ff127 | 377 | log_debug("systemd-machined running as pid "PID_FMT, getpid_cached()); |
c8f05436 LP |
378 | (void) sd_notify(false, |
379 | "READY=1\n" | |
380 | "STATUS=Processing requests..."); | |
1ee306e1 LP |
381 | |
382 | r = manager_run(m); | |
383 | ||
df0ff127 | 384 | log_debug("systemd-machined stopped as pid "PID_FMT, getpid_cached()); |
c8f05436 LP |
385 | (void) sd_notify(false, |
386 | "STOPPING=1\n" | |
387 | "STATUS=Shutting down..."); | |
388 | ||
9b58b5ad | 389 | return r; |
1ee306e1 | 390 | } |
9b58b5ad ZJS |
391 | |
392 | DEFINE_MAIN_FUNCTION(run); |