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db9ecf05 | 1 | /* SPDX-License-Identifier: LGPL-2.1-or-later */ |
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" |
9b71e4ab | 13 | #include "bus-locator.h" |
ac9f55ed | 14 | #include "bus-log-control-api.h" |
269e4d2d | 15 | #include "bus-polkit.h" |
3ffd4af2 | 16 | #include "cgroup-util.h" |
a0956174 | 17 | #include "dirent-util.h" |
3ffd4af2 | 18 | #include "fd-util.h" |
f97b34a6 | 19 | #include "format-util.h" |
25300b5a | 20 | #include "hostname-util.h" |
3ffd4af2 | 21 | #include "label.h" |
1ddb263d | 22 | #include "machine-image.h" |
4751364e | 23 | #include "machined-varlink.h" |
ebeccf9e | 24 | #include "machined.h" |
5e332028 | 25 | #include "main-func.h" |
df0ff127 | 26 | #include "process-util.h" |
fc021a5b | 27 | #include "service-util.h" |
3ffd4af2 | 28 | #include "signal-util.h" |
e5af6e0e | 29 | #include "special.h" |
1ee306e1 | 30 | |
730fa7ce LP |
31 | static Manager* manager_unref(Manager *m); |
32 | DEFINE_TRIVIAL_CLEANUP_FUNC(Manager*, manager_unref); | |
33 | ||
5be61bea | 34 | DEFINE_PRIVATE_HASH_OPS_WITH_VALUE_DESTRUCTOR(machine_hash_ops, char, string_hash_func, string_compare_func, Machine, machine_free); |
bb1a05d6 | 35 | |
730fa7ce LP |
36 | static int manager_new(Manager **ret) { |
37 | _cleanup_(manager_unrefp) Manager *m = NULL; | |
c3350683 | 38 | int r; |
1ee306e1 | 39 | |
730fa7ce LP |
40 | assert(ret); |
41 | ||
1ee306e1 LP |
42 | m = new0(Manager, 1); |
43 | if (!m) | |
730fa7ce | 44 | return -ENOMEM; |
1ee306e1 | 45 | |
5be61bea | 46 | m->machines = hashmap_new(&machine_hash_ops); |
d5099efc | 47 | m->machine_units = hashmap_new(&string_hash_ops); |
5be61bea | 48 | m->machine_leaders = hashmap_new(NULL); |
1ee306e1 | 49 | |
730fa7ce LP |
50 | if (!m->machines || !m->machine_units || !m->machine_leaders) |
51 | return -ENOMEM; | |
c3350683 | 52 | |
afc6adb5 | 53 | r = sd_event_default(&m->event); |
730fa7ce LP |
54 | if (r < 0) |
55 | return r; | |
56 | ||
57 | r = sd_event_add_signal(m->event, NULL, SIGINT, NULL, NULL); | |
58 | if (r < 0) | |
59 | return r; | |
60 | ||
61 | r = sd_event_add_signal(m->event, NULL, SIGTERM, NULL, NULL); | |
62 | if (r < 0) | |
63 | return r; | |
1ee306e1 | 64 | |
730fa7ce | 65 | (void) sd_event_set_watchdog(m->event, true); |
cde93897 | 66 | |
730fa7ce LP |
67 | *ret = TAKE_PTR(m); |
68 | return 0; | |
1ee306e1 LP |
69 | } |
70 | ||
730fa7ce | 71 | static Manager* manager_unref(Manager *m) { |
c8f05436 LP |
72 | if (!m) |
73 | return NULL; | |
1ee306e1 | 74 | |
56599585 LP |
75 | while (m->operations) |
76 | operation_free(m->operations); | |
77 | ||
78 | assert(m->n_operations == 0); | |
79 | ||
5be61bea | 80 | hashmap_free(m->machines); /* This will free all machines, so that the machine_units/machine_leaders is empty */ |
1ee306e1 | 81 | hashmap_free(m->machine_units); |
d3e84ddb | 82 | hashmap_free(m->machine_leaders); |
b07ec5a1 | 83 | hashmap_free(m->image_cache); |
1ddb263d LP |
84 | |
85 | sd_event_source_unref(m->image_cache_defer_event); | |
7e0079f9 | 86 | #if ENABLE_NSCD |
9fdcbae5 | 87 | sd_event_source_unref(m->nscd_cache_flush_event); |
7e0079f9 | 88 | #endif |
1ddb263d | 89 | |
d04c1fb8 LP |
90 | bus_verify_polkit_async_registry_free(m->polkit_registry); |
91 | ||
4751364e LP |
92 | manager_varlink_done(m); |
93 | ||
92e31da1 | 94 | sd_bus_flush_close_unref(m->bus); |
c3350683 LP |
95 | sd_event_unref(m->event); |
96 | ||
730fa7ce | 97 | return mfree(m); |
c3350683 LP |
98 | } |
99 | ||
fbe55073 LP |
100 | static int manager_add_host_machine(Manager *m) { |
101 | _cleanup_free_ char *rd = NULL, *unit = NULL; | |
102 | sd_id128_t mid; | |
103 | Machine *t; | |
104 | int r; | |
105 | ||
106 | if (m->host_machine) | |
107 | return 0; | |
108 | ||
109 | r = sd_id128_get_machine(&mid); | |
110 | if (r < 0) | |
111 | return log_error_errno(r, "Failed to get machine ID: %m"); | |
112 | ||
113 | rd = strdup("/"); | |
114 | if (!rd) | |
115 | return log_oom(); | |
116 | ||
e5af6e0e | 117 | unit = strdup(SPECIAL_ROOT_SLICE); |
fbe55073 LP |
118 | if (!unit) |
119 | return log_oom(); | |
120 | ||
121 | t = machine_new(m, MACHINE_HOST, ".host"); | |
122 | if (!t) | |
123 | return log_oom(); | |
124 | ||
125 | t->leader = 1; | |
126 | t->id = mid; | |
127 | ||
1cc6c93a YW |
128 | t->root_directory = TAKE_PTR(rd); |
129 | t->unit = TAKE_PTR(unit); | |
fbe55073 LP |
130 | |
131 | dual_timestamp_from_boottime_or_monotonic(&t->timestamp, 0); | |
132 | ||
133 | m->host_machine = t; | |
134 | ||
135 | return 0; | |
136 | } | |
137 | ||
730fa7ce | 138 | static int manager_enumerate_machines(Manager *m) { |
1ee306e1 LP |
139 | _cleanup_closedir_ DIR *d = NULL; |
140 | struct dirent *de; | |
6d95e7d9 | 141 | int r; |
1ee306e1 LP |
142 | |
143 | assert(m); | |
144 | ||
fbe55073 LP |
145 | r = manager_add_host_machine(m); |
146 | if (r < 0) | |
147 | return r; | |
148 | ||
1ee306e1 LP |
149 | /* Read in machine data stored on disk */ |
150 | d = opendir("/run/systemd/machines"); | |
151 | if (!d) { | |
152 | if (errno == ENOENT) | |
153 | return 0; | |
154 | ||
e1427b13 | 155 | return log_error_errno(errno, "Failed to open /run/systemd/machines: %m"); |
1ee306e1 LP |
156 | } |
157 | ||
158 | FOREACH_DIRENT(de, d, return -errno) { | |
159 | struct Machine *machine; | |
160 | int k; | |
161 | ||
162 | if (!dirent_is_file(de)) | |
163 | continue; | |
164 | ||
b87633c4 LP |
165 | /* Ignore symlinks that map the unit name to the machine */ |
166 | if (startswith(de->d_name, "unit:")) | |
167 | continue; | |
168 | ||
52ef5dd7 | 169 | if (!hostname_is_valid(de->d_name, 0)) |
b9a8d250 LP |
170 | continue; |
171 | ||
1ee306e1 LP |
172 | k = manager_add_machine(m, de->d_name, &machine); |
173 | if (k < 0) { | |
fbe55073 | 174 | r = log_error_errno(k, "Failed to add machine by file name %s: %m", de->d_name); |
1ee306e1 LP |
175 | continue; |
176 | } | |
177 | ||
178 | machine_add_to_gc_queue(machine); | |
179 | ||
180 | k = machine_load(machine); | |
181 | if (k < 0) | |
182 | r = k; | |
183 | } | |
184 | ||
185 | return r; | |
186 | } | |
187 | ||
1ee306e1 | 188 | static int manager_connect_bus(Manager *m) { |
1ee306e1 | 189 | int r; |
1ee306e1 LP |
190 | |
191 | assert(m); | |
192 | assert(!m->bus); | |
1ee306e1 | 193 | |
76b54375 | 194 | r = sd_bus_default_system(&m->bus); |
f647962d MS |
195 | if (r < 0) |
196 | return log_error_errno(r, "Failed to connect to system bus: %m"); | |
1ee306e1 | 197 | |
4faa530c | 198 | r = bus_add_implementation(m->bus, &manager_object, m); |
f647962d | 199 | if (r < 0) |
4faa530c | 200 | return r; |
ebeccf9e | 201 | |
14456f76 | 202 | r = bus_match_signal_async(m->bus, NULL, bus_systemd_mgr, "JobRemoved", match_job_removed, NULL, m); |
f647962d MS |
203 | if (r < 0) |
204 | return log_error_errno(r, "Failed to add match for JobRemoved: %m"); | |
1ee306e1 | 205 | |
14456f76 | 206 | r = bus_match_signal_async(m->bus, NULL, bus_systemd_mgr, "UnitRemoved", match_unit_removed, NULL, m); |
f647962d | 207 | if (r < 0) |
75152a4d LP |
208 | return log_error_errno(r, "Failed to request match for UnitRemoved: %m"); |
209 | ||
210 | r = sd_bus_match_signal_async( | |
211 | m->bus, | |
212 | NULL, | |
213 | "org.freedesktop.systemd1", | |
214 | NULL, | |
215 | "org.freedesktop.DBus.Properties", | |
216 | "PropertiesChanged", | |
217 | match_properties_changed, NULL, m); | |
f647962d | 218 | if (r < 0) |
75152a4d LP |
219 | return log_error_errno(r, "Failed to request match for PropertiesChanged: %m"); |
220 | ||
14456f76 | 221 | r = bus_match_signal_async(m->bus, NULL, bus_systemd_mgr, "Reloading", match_reloading, NULL, m); |
f647962d | 222 | if (r < 0) |
75152a4d | 223 | return log_error_errno(r, "Failed to request match for Reloading: %m"); |
6797c324 | 224 | |
14456f76 | 225 | r = bus_call_method_async(m->bus, NULL, bus_systemd_mgr, "Subscribe", NULL, NULL, NULL); |
31b2cd5d LP |
226 | if (r < 0) |
227 | return log_error_errno(r, "Failed to enable subscription: %m"); | |
1ee306e1 | 228 | |
ac9f55ed LP |
229 | r = bus_log_control_api_register(m->bus); |
230 | if (r < 0) | |
231 | return r; | |
232 | ||
0c0b9306 | 233 | r = sd_bus_request_name_async(m->bus, NULL, "org.freedesktop.machine1", 0, NULL, NULL); |
f647962d | 234 | if (r < 0) |
0c0b9306 | 235 | return log_error_errno(r, "Failed to request name: %m"); |
1ee306e1 | 236 | |
c3350683 | 237 | r = sd_bus_attach_event(m->bus, m->event, 0); |
f647962d MS |
238 | if (r < 0) |
239 | return log_error_errno(r, "Failed to attach bus to event loop: %m"); | |
1ee306e1 | 240 | |
1ee306e1 | 241 | return 0; |
1ee306e1 LP |
242 | } |
243 | ||
730fa7ce | 244 | static void manager_gc(Manager *m, bool drop_not_started) { |
1ee306e1 LP |
245 | Machine *machine; |
246 | ||
247 | assert(m); | |
248 | ||
249 | while ((machine = m->machine_gc_queue)) { | |
71fda00f | 250 | LIST_REMOVE(gc_queue, m->machine_gc_queue, machine); |
1ee306e1 LP |
251 | machine->in_gc_queue = false; |
252 | ||
49f3fffd | 253 | /* First, if we are not closing yet, initiate stopping */ |
554ce41f | 254 | if (machine_may_gc(machine, drop_not_started) && |
49f3fffd | 255 | machine_get_state(machine) != MACHINE_CLOSING) |
1ee306e1 | 256 | machine_stop(machine); |
49f3fffd | 257 | |
61233823 | 258 | /* Now, the stop probably made this referenced |
49f3fffd LP |
259 | * again, but if it didn't, then it's time to let it |
260 | * go entirely. */ | |
554ce41f | 261 | if (machine_may_gc(machine, drop_not_started)) { |
49f3fffd | 262 | machine_finalize(machine); |
1ee306e1 LP |
263 | machine_free(machine); |
264 | } | |
265 | } | |
266 | } | |
267 | ||
730fa7ce | 268 | static int manager_startup(Manager *m) { |
1ee306e1 | 269 | Machine *machine; |
c3350683 | 270 | int r; |
1ee306e1 LP |
271 | |
272 | assert(m); | |
1ee306e1 LP |
273 | |
274 | /* Connect to the bus */ | |
275 | r = manager_connect_bus(m); | |
276 | if (r < 0) | |
277 | return r; | |
278 | ||
4751364e LP |
279 | /* Set up Varlink service */ |
280 | r = manager_varlink_init(m); | |
281 | if (r < 0) | |
282 | return r; | |
283 | ||
1ee306e1 LP |
284 | /* Deserialize state */ |
285 | manager_enumerate_machines(m); | |
286 | ||
287 | /* Remove stale objects before we start them */ | |
288 | manager_gc(m, false); | |
289 | ||
290 | /* And start everything */ | |
90e74a66 | 291 | HASHMAP_FOREACH(machine, m->machines) |
c3350683 | 292 | machine_start(machine, NULL, NULL); |
1ee306e1 LP |
293 | |
294 | return 0; | |
295 | } | |
296 | ||
d9e34bfd LP |
297 | static bool check_idle(void *userdata) { |
298 | Manager *m = userdata; | |
1ee306e1 | 299 | |
56599585 LP |
300 | if (m->operations) |
301 | return false; | |
302 | ||
4751364e LP |
303 | if (varlink_server_current_connections(m->varlink_server) > 0) |
304 | return false; | |
305 | ||
d9e34bfd | 306 | manager_gc(m, true); |
1ee306e1 | 307 | |
d9e34bfd LP |
308 | return hashmap_isempty(m->machines); |
309 | } | |
1ee306e1 | 310 | |
730fa7ce | 311 | static int manager_run(Manager *m) { |
d9e34bfd | 312 | assert(m); |
1ee306e1 | 313 | |
d9e34bfd LP |
314 | return bus_event_loop_with_idle( |
315 | m->event, | |
316 | m->bus, | |
317 | "org.freedesktop.machine1", | |
318 | DEFAULT_EXIT_USEC, | |
319 | check_idle, m); | |
1ee306e1 LP |
320 | } |
321 | ||
9b58b5ad | 322 | static int run(int argc, char *argv[]) { |
730fa7ce | 323 | _cleanup_(manager_unrefp) Manager *m = NULL; |
1ee306e1 LP |
324 | int r; |
325 | ||
1ee306e1 | 326 | log_set_facility(LOG_AUTH); |
6bf3c61c | 327 | log_setup_service(); |
1ee306e1 | 328 | |
fc021a5b ZJS |
329 | r = service_parse_argv("systemd-machined.service", |
330 | "Manage registrations of local VMs and containers.", | |
4faa530c ZJS |
331 | BUS_IMPLEMENTATIONS(&manager_object, |
332 | &log_control_object), | |
fc021a5b ZJS |
333 | argc, argv); |
334 | if (r <= 0) | |
335 | return r; | |
1ee306e1 | 336 | |
fc021a5b | 337 | umask(0022); |
1ee306e1 | 338 | |
730fa7ce LP |
339 | /* Always create the directories people can create inotify watches in. Note that some applications might check |
340 | * for the existence of /run/systemd/machines/ to determine whether machined is available, so please always | |
341 | * make sure this check stays in. */ | |
342 | (void) mkdir_label("/run/systemd/machines", 0755); | |
1ee306e1 | 343 | |
730fa7ce | 344 | assert_se(sigprocmask_many(SIG_BLOCK, NULL, SIGCHLD, SIGTERM, SIGINT, -1) >= 0); |
0370612e | 345 | |
730fa7ce | 346 | r = manager_new(&m); |
9b58b5ad ZJS |
347 | if (r < 0) |
348 | return log_error_errno(r, "Failed to allocate manager object: %m"); | |
1ee306e1 LP |
349 | |
350 | r = manager_startup(m); | |
9b58b5ad ZJS |
351 | if (r < 0) |
352 | return log_error_errno(r, "Failed to fully start up daemon: %m"); | |
1ee306e1 | 353 | |
df0ff127 | 354 | log_debug("systemd-machined running as pid "PID_FMT, getpid_cached()); |
c8f05436 LP |
355 | (void) sd_notify(false, |
356 | "READY=1\n" | |
357 | "STATUS=Processing requests..."); | |
1ee306e1 LP |
358 | |
359 | r = manager_run(m); | |
360 | ||
df0ff127 | 361 | log_debug("systemd-machined stopped as pid "PID_FMT, getpid_cached()); |
c8f05436 LP |
362 | (void) sd_notify(false, |
363 | "STOPPING=1\n" | |
364 | "STATUS=Shutting down..."); | |
365 | ||
9b58b5ad | 366 | return r; |
1ee306e1 | 367 | } |
9b58b5ad ZJS |
368 | |
369 | DEFINE_MAIN_FUNCTION(run); |