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9444b1f2 LP |
1 | /*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/ |
2 | ||
3 | /*** | |
4 | This file is part of systemd. | |
5 | ||
6 | Copyright 2011 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 <string.h> | |
23 | #include <unistd.h> | |
24 | #include <errno.h> | |
25 | ||
fb6becb4 LP |
26 | #include <systemd/sd-messages.h> |
27 | ||
9444b1f2 LP |
28 | #include "util.h" |
29 | #include "mkdir.h" | |
30 | #include "cgroup-util.h" | |
31 | #include "hashmap.h" | |
32 | #include "strv.h" | |
33 | #include "fileio.h" | |
34 | #include "special.h" | |
fb6becb4 LP |
35 | #include "unit-name.h" |
36 | #include "dbus-common.h" | |
37 | #include "logind-machine.h" | |
9444b1f2 LP |
38 | |
39 | Machine* machine_new(Manager *manager, const char *name) { | |
40 | Machine *m; | |
41 | ||
42 | assert(manager); | |
43 | assert(name); | |
44 | ||
45 | m = new0(Machine, 1); | |
46 | if (!m) | |
47 | return NULL; | |
48 | ||
49 | m->name = strdup(name); | |
50 | if (!m->name) | |
51 | goto fail; | |
52 | ||
53 | m->state_file = strappend("/run/systemd/machines/", m->name); | |
54 | if (!m->state_file) | |
55 | goto fail; | |
56 | ||
57 | if (hashmap_put(manager->machines, m->name, m) < 0) | |
58 | goto fail; | |
59 | ||
60 | m->class = _MACHINE_CLASS_INVALID; | |
61 | m->manager = manager; | |
62 | ||
63 | return m; | |
64 | ||
65 | fail: | |
66 | free(m->state_file); | |
67 | free(m->name); | |
68 | free(m); | |
69 | ||
70 | return NULL; | |
71 | } | |
72 | ||
73 | void machine_free(Machine *m) { | |
74 | assert(m); | |
75 | ||
76 | if (m->in_gc_queue) | |
77 | LIST_REMOVE(Machine, gc_queue, m->manager->machine_gc_queue, m); | |
78 | ||
fb6becb4 LP |
79 | if (m->scope) { |
80 | hashmap_remove(m->manager->machine_units, m->scope); | |
81 | free(m->scope); | |
9444b1f2 LP |
82 | } |
83 | ||
fb6becb4 LP |
84 | free(m->scope_job); |
85 | ||
9444b1f2 LP |
86 | hashmap_remove(m->manager->machines, m->name); |
87 | ||
fb6becb4 LP |
88 | if (m->create_message) |
89 | dbus_message_unref(m->create_message); | |
90 | ||
9444b1f2 LP |
91 | free(m->name); |
92 | free(m->state_file); | |
93 | free(m->service); | |
9444b1f2 LP |
94 | free(m->root_directory); |
95 | free(m); | |
96 | } | |
97 | ||
98 | int machine_save(Machine *m) { | |
99 | _cleanup_free_ char *temp_path = NULL; | |
100 | _cleanup_fclose_ FILE *f = NULL; | |
101 | int r; | |
102 | ||
103 | assert(m); | |
104 | assert(m->state_file); | |
105 | ||
106 | if (!m->started) | |
107 | return 0; | |
108 | ||
109 | r = mkdir_safe_label("/run/systemd/machines", 0755, 0, 0); | |
110 | if (r < 0) | |
111 | goto finish; | |
112 | ||
113 | r = fopen_temporary(m->state_file, &f, &temp_path); | |
114 | if (r < 0) | |
115 | goto finish; | |
116 | ||
117 | fchmod(fileno(f), 0644); | |
118 | ||
119 | fprintf(f, | |
120 | "# This is private data. Do not parse.\n" | |
121 | "NAME=%s\n", | |
122 | m->name); | |
123 | ||
fb6becb4 LP |
124 | if (m->scope) |
125 | fprintf(f, "SCOPE=%s\n", m->scope); | |
126 | ||
127 | if (m->scope_job) | |
128 | fprintf(f, "SCOPE_JOB=%s\n", m->scope_job); | |
9444b1f2 LP |
129 | |
130 | if (m->service) | |
131 | fprintf(f, "SERVICE=%s\n", m->service); | |
132 | ||
9444b1f2 LP |
133 | if (m->root_directory) |
134 | fprintf(f, "ROOT=%s\n", m->root_directory); | |
135 | ||
136 | if (!sd_id128_equal(m->id, SD_ID128_NULL)) | |
137 | fprintf(f, "ID=" SD_ID128_FORMAT_STR "\n", SD_ID128_FORMAT_VAL(m->id)); | |
138 | ||
139 | if (m->leader != 0) | |
140 | fprintf(f, "LEADER=%lu\n", (unsigned long) m->leader); | |
141 | ||
142 | if (m->class != _MACHINE_CLASS_INVALID) | |
143 | fprintf(f, "CLASS=%s\n", machine_class_to_string(m->class)); | |
144 | ||
145 | if (dual_timestamp_is_set(&m->timestamp)) | |
146 | fprintf(f, | |
147 | "REALTIME=%llu\n" | |
148 | "MONOTONIC=%llu\n", | |
149 | (unsigned long long) m->timestamp.realtime, | |
150 | (unsigned long long) m->timestamp.monotonic); | |
151 | ||
152 | fflush(f); | |
153 | ||
154 | if (ferror(f) || rename(temp_path, m->state_file) < 0) { | |
155 | r = -errno; | |
156 | unlink(m->state_file); | |
157 | unlink(temp_path); | |
158 | } | |
159 | ||
160 | finish: | |
161 | if (r < 0) | |
162 | log_error("Failed to save machine data for %s: %s", m->name, strerror(-r)); | |
163 | ||
164 | return r; | |
165 | } | |
166 | ||
167 | int machine_load(Machine *m) { | |
168 | _cleanup_free_ char *realtime = NULL, *monotonic = NULL, *id = NULL, *leader = NULL, *class = NULL; | |
169 | int r; | |
170 | ||
171 | assert(m); | |
172 | ||
173 | r = parse_env_file(m->state_file, NEWLINE, | |
fb6becb4 LP |
174 | "SCOPE", &m->scope, |
175 | "SCOPE_JOB", &m->scope_job, | |
9444b1f2 | 176 | "SERVICE", &m->service, |
9444b1f2 LP |
177 | "ROOT", &m->root_directory, |
178 | "ID", &id, | |
179 | "LEADER", &leader, | |
180 | "CLASS", &class, | |
181 | "REALTIME", &realtime, | |
182 | "MONOTONIC", &monotonic, | |
183 | NULL); | |
184 | if (r < 0) { | |
185 | if (r == -ENOENT) | |
186 | return 0; | |
187 | ||
188 | log_error("Failed to read %s: %s", m->state_file, strerror(-r)); | |
189 | return r; | |
190 | } | |
191 | ||
192 | if (id) | |
193 | sd_id128_from_string(id, &m->id); | |
194 | ||
195 | if (leader) | |
196 | parse_pid(leader, &m->leader); | |
197 | ||
198 | if (class) { | |
199 | MachineClass c; | |
200 | ||
201 | c = machine_class_from_string(class); | |
202 | if (c >= 0) | |
203 | m->class = c; | |
204 | } | |
205 | ||
206 | if (realtime) { | |
207 | unsigned long long l; | |
208 | if (sscanf(realtime, "%llu", &l) > 0) | |
209 | m->timestamp.realtime = l; | |
210 | } | |
211 | ||
212 | if (monotonic) { | |
213 | unsigned long long l; | |
214 | if (sscanf(monotonic, "%llu", &l) > 0) | |
215 | m->timestamp.monotonic = l; | |
216 | } | |
217 | ||
218 | return r; | |
219 | } | |
220 | ||
fb6becb4 LP |
221 | static int machine_start_scope(Machine *m) { |
222 | _cleanup_free_ char *description = NULL; | |
223 | DBusError error; | |
224 | char *job; | |
9444b1f2 LP |
225 | int r; |
226 | ||
227 | assert(m); | |
228 | ||
fb6becb4 | 229 | dbus_error_init(&error); |
9444b1f2 | 230 | |
fb6becb4 LP |
231 | if (!m->scope) { |
232 | _cleanup_free_ char *escaped = NULL; | |
9444b1f2 | 233 | |
fb6becb4 | 234 | escaped = unit_name_escape(m->name); |
9444b1f2 LP |
235 | if (!escaped) |
236 | return log_oom(); | |
237 | ||
374ec6ab | 238 | m->scope = strjoin("machine-", m->name, ".scope", NULL); |
fb6becb4 | 239 | if (!m->scope) |
9444b1f2 | 240 | return log_oom(); |
9444b1f2 | 241 | |
fb6becb4 | 242 | r = hashmap_put(m->manager->machine_units, m->scope, m); |
9444b1f2 | 243 | if (r < 0) |
fb6becb4 | 244 | log_warning("Failed to create mapping between unit and machine"); |
9444b1f2 LP |
245 | } |
246 | ||
fb6becb4 LP |
247 | description = strappend(m->class == MACHINE_VM ? "Virtual Machine " : "Container ", m->name); |
248 | ||
249 | r = manager_start_scope(m->manager, m->scope, m->leader, SPECIAL_MACHINE_SLICE, description, &error, &job); | |
250 | if (r < 0) { | |
251 | log_error("Failed to start machine scope: %s", bus_error(&error, r)); | |
252 | dbus_error_free(&error); | |
9444b1f2 LP |
253 | } |
254 | ||
fb6becb4 LP |
255 | free(m->scope_job); |
256 | m->scope_job = job; | |
9444b1f2 | 257 | |
fb6becb4 | 258 | return r; |
9444b1f2 LP |
259 | } |
260 | ||
261 | int machine_start(Machine *m) { | |
262 | int r; | |
263 | ||
264 | assert(m); | |
265 | ||
266 | if (m->started) | |
267 | return 0; | |
268 | ||
fb6becb4 LP |
269 | /* Create cgroup */ |
270 | r = machine_start_scope(m); | |
271 | if (r < 0) | |
272 | return r; | |
273 | ||
9444b1f2 LP |
274 | log_struct(LOG_INFO, |
275 | MESSAGE_ID(SD_MESSAGE_MACHINE_START), | |
276 | "NAME=%s", m->name, | |
277 | "LEADER=%lu", (unsigned long) m->leader, | |
278 | "MESSAGE=New machine %s.", m->name, | |
279 | NULL); | |
280 | ||
9444b1f2 LP |
281 | if (!dual_timestamp_is_set(&m->timestamp)) |
282 | dual_timestamp_get(&m->timestamp); | |
283 | ||
284 | m->started = true; | |
285 | ||
286 | /* Save new machine data */ | |
287 | machine_save(m); | |
288 | ||
289 | machine_send_signal(m, true); | |
290 | ||
291 | return 0; | |
292 | } | |
293 | ||
fb6becb4 LP |
294 | static int machine_stop_scope(Machine *m) { |
295 | DBusError error; | |
296 | char *job; | |
9444b1f2 | 297 | int r; |
9444b1f2 LP |
298 | |
299 | assert(m); | |
300 | ||
fb6becb4 | 301 | dbus_error_init(&error); |
9444b1f2 | 302 | |
fb6becb4 LP |
303 | if (!m->scope) |
304 | return 0; | |
9444b1f2 | 305 | |
fb6becb4 LP |
306 | r = manager_stop_unit(m->manager, m->scope, &error, &job); |
307 | if (r < 0) { | |
308 | log_error("Failed to stop machine scope: %s", bus_error(&error, r)); | |
309 | dbus_error_free(&error); | |
310 | return r; | |
311 | } | |
9444b1f2 | 312 | |
fb6becb4 LP |
313 | free(m->scope_job); |
314 | m->scope_job = job; | |
9444b1f2 LP |
315 | |
316 | return r; | |
317 | } | |
318 | ||
319 | int machine_stop(Machine *m) { | |
320 | int r = 0, k; | |
321 | assert(m); | |
322 | ||
323 | if (m->started) | |
324 | log_struct(LOG_INFO, | |
325 | MESSAGE_ID(SD_MESSAGE_MACHINE_STOP), | |
326 | "NAME=%s", m->name, | |
327 | "LEADER=%lu", (unsigned long) m->leader, | |
328 | "MESSAGE=Machine %s terminated.", m->name, | |
329 | NULL); | |
330 | ||
331 | /* Kill cgroup */ | |
fb6becb4 | 332 | k = machine_stop_scope(m); |
9444b1f2 LP |
333 | if (k < 0) |
334 | r = k; | |
335 | ||
336 | unlink(m->state_file); | |
337 | machine_add_to_gc_queue(m); | |
338 | ||
339 | if (m->started) | |
340 | machine_send_signal(m, false); | |
341 | ||
342 | m->started = false; | |
343 | ||
344 | return r; | |
345 | } | |
346 | ||
347 | int machine_check_gc(Machine *m, bool drop_not_started) { | |
9444b1f2 LP |
348 | assert(m); |
349 | ||
350 | if (drop_not_started && !m->started) | |
351 | return 0; | |
352 | ||
fb6becb4 LP |
353 | if (m->scope_job) |
354 | return 1; | |
9444b1f2 | 355 | |
fb6becb4 LP |
356 | if (m->scope) |
357 | return manager_unit_is_active(m->manager, m->scope) != 0; | |
9444b1f2 LP |
358 | |
359 | return 0; | |
360 | } | |
361 | ||
362 | void machine_add_to_gc_queue(Machine *m) { | |
363 | assert(m); | |
364 | ||
365 | if (m->in_gc_queue) | |
366 | return; | |
367 | ||
368 | LIST_PREPEND(Machine, gc_queue, m->manager->machine_gc_queue, m); | |
369 | m->in_gc_queue = true; | |
370 | } | |
371 | ||
fb6becb4 LP |
372 | MachineState machine_get_state(Machine *s) { |
373 | assert(s); | |
9444b1f2 | 374 | |
fb6becb4 LP |
375 | if (s->scope_job) |
376 | return s->started ? MACHINE_OPENING : MACHINE_CLOSING; | |
9444b1f2 | 377 | |
fb6becb4 LP |
378 | return MACHINE_RUNNING; |
379 | } | |
9444b1f2 | 380 | |
fb6becb4 LP |
381 | int machine_kill(Machine *m, KillWho who, int signo) { |
382 | assert(m); | |
9444b1f2 | 383 | |
fb6becb4 LP |
384 | if (!m->scope) |
385 | return -ESRCH; | |
9444b1f2 | 386 | |
fb6becb4 | 387 | return manager_kill_unit(m->manager, m->scope, who, signo, NULL); |
9444b1f2 LP |
388 | } |
389 | ||
390 | static const char* const machine_class_table[_MACHINE_CLASS_MAX] = { | |
391 | [MACHINE_CONTAINER] = "container", | |
392 | [MACHINE_VM] = "vm" | |
393 | }; | |
394 | ||
395 | DEFINE_STRING_TABLE_LOOKUP(machine_class, MachineClass); | |
fb6becb4 LP |
396 | |
397 | static const char* const machine_state_table[_MACHINE_STATE_MAX] = { | |
398 | [MACHINE_OPENING] = "opening", | |
399 | [MACHINE_RUNNING] = "running", | |
400 | [MACHINE_CLOSING] = "closing" | |
401 | }; | |
402 | ||
403 | DEFINE_STRING_TABLE_LOOKUP(machine_state, MachineState); |