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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" | |
9444b1f2 LP |
30 | #include "hashmap.h" |
31 | #include "strv.h" | |
32 | #include "fileio.h" | |
33 | #include "special.h" | |
fb6becb4 LP |
34 | #include "unit-name.h" |
35 | #include "dbus-common.h" | |
1ee306e1 | 36 | #include "machine.h" |
9444b1f2 LP |
37 | |
38 | Machine* machine_new(Manager *manager, const char *name) { | |
39 | Machine *m; | |
40 | ||
41 | assert(manager); | |
42 | assert(name); | |
43 | ||
44 | m = new0(Machine, 1); | |
45 | if (!m) | |
46 | return NULL; | |
47 | ||
48 | m->name = strdup(name); | |
49 | if (!m->name) | |
50 | goto fail; | |
51 | ||
52 | m->state_file = strappend("/run/systemd/machines/", m->name); | |
53 | if (!m->state_file) | |
54 | goto fail; | |
55 | ||
56 | if (hashmap_put(manager->machines, m->name, m) < 0) | |
57 | goto fail; | |
58 | ||
59 | m->class = _MACHINE_CLASS_INVALID; | |
60 | m->manager = manager; | |
61 | ||
62 | return m; | |
63 | ||
64 | fail: | |
65 | free(m->state_file); | |
66 | free(m->name); | |
67 | free(m); | |
68 | ||
69 | return NULL; | |
70 | } | |
71 | ||
72 | void machine_free(Machine *m) { | |
73 | assert(m); | |
74 | ||
75 | if (m->in_gc_queue) | |
76 | LIST_REMOVE(Machine, gc_queue, m->manager->machine_gc_queue, m); | |
77 | ||
fb6becb4 LP |
78 | if (m->scope) { |
79 | hashmap_remove(m->manager->machine_units, m->scope); | |
80 | free(m->scope); | |
9444b1f2 LP |
81 | } |
82 | ||
fb6becb4 LP |
83 | free(m->scope_job); |
84 | ||
9444b1f2 LP |
85 | hashmap_remove(m->manager->machines, m->name); |
86 | ||
fb6becb4 LP |
87 | if (m->create_message) |
88 | dbus_message_unref(m->create_message); | |
89 | ||
9444b1f2 LP |
90 | free(m->name); |
91 | free(m->state_file); | |
92 | free(m->service); | |
9444b1f2 LP |
93 | free(m->root_directory); |
94 | free(m); | |
95 | } | |
96 | ||
97 | int machine_save(Machine *m) { | |
98 | _cleanup_free_ char *temp_path = NULL; | |
99 | _cleanup_fclose_ FILE *f = NULL; | |
100 | int r; | |
101 | ||
102 | assert(m); | |
103 | assert(m->state_file); | |
104 | ||
105 | if (!m->started) | |
106 | return 0; | |
107 | ||
108 | r = mkdir_safe_label("/run/systemd/machines", 0755, 0, 0); | |
109 | if (r < 0) | |
110 | goto finish; | |
111 | ||
112 | r = fopen_temporary(m->state_file, &f, &temp_path); | |
113 | if (r < 0) | |
114 | goto finish; | |
115 | ||
116 | fchmod(fileno(f), 0644); | |
117 | ||
118 | fprintf(f, | |
119 | "# This is private data. Do not parse.\n" | |
120 | "NAME=%s\n", | |
121 | m->name); | |
122 | ||
fb6becb4 LP |
123 | if (m->scope) |
124 | fprintf(f, "SCOPE=%s\n", m->scope); | |
125 | ||
126 | if (m->scope_job) | |
127 | fprintf(f, "SCOPE_JOB=%s\n", m->scope_job); | |
9444b1f2 LP |
128 | |
129 | if (m->service) | |
130 | fprintf(f, "SERVICE=%s\n", m->service); | |
131 | ||
9444b1f2 LP |
132 | if (m->root_directory) |
133 | fprintf(f, "ROOT=%s\n", m->root_directory); | |
134 | ||
135 | if (!sd_id128_equal(m->id, SD_ID128_NULL)) | |
136 | fprintf(f, "ID=" SD_ID128_FORMAT_STR "\n", SD_ID128_FORMAT_VAL(m->id)); | |
137 | ||
138 | if (m->leader != 0) | |
139 | fprintf(f, "LEADER=%lu\n", (unsigned long) m->leader); | |
140 | ||
141 | if (m->class != _MACHINE_CLASS_INVALID) | |
142 | fprintf(f, "CLASS=%s\n", machine_class_to_string(m->class)); | |
143 | ||
144 | if (dual_timestamp_is_set(&m->timestamp)) | |
145 | fprintf(f, | |
146 | "REALTIME=%llu\n" | |
147 | "MONOTONIC=%llu\n", | |
148 | (unsigned long long) m->timestamp.realtime, | |
149 | (unsigned long long) m->timestamp.monotonic); | |
150 | ||
151 | fflush(f); | |
152 | ||
153 | if (ferror(f) || rename(temp_path, m->state_file) < 0) { | |
154 | r = -errno; | |
155 | unlink(m->state_file); | |
156 | unlink(temp_path); | |
157 | } | |
158 | ||
159 | finish: | |
160 | if (r < 0) | |
161 | log_error("Failed to save machine data for %s: %s", m->name, strerror(-r)); | |
162 | ||
163 | return r; | |
164 | } | |
165 | ||
166 | int machine_load(Machine *m) { | |
167 | _cleanup_free_ char *realtime = NULL, *monotonic = NULL, *id = NULL, *leader = NULL, *class = NULL; | |
168 | int r; | |
169 | ||
170 | assert(m); | |
171 | ||
172 | r = parse_env_file(m->state_file, NEWLINE, | |
fb6becb4 LP |
173 | "SCOPE", &m->scope, |
174 | "SCOPE_JOB", &m->scope_job, | |
9444b1f2 | 175 | "SERVICE", &m->service, |
9444b1f2 LP |
176 | "ROOT", &m->root_directory, |
177 | "ID", &id, | |
178 | "LEADER", &leader, | |
179 | "CLASS", &class, | |
180 | "REALTIME", &realtime, | |
181 | "MONOTONIC", &monotonic, | |
182 | NULL); | |
183 | if (r < 0) { | |
184 | if (r == -ENOENT) | |
185 | return 0; | |
186 | ||
187 | log_error("Failed to read %s: %s", m->state_file, strerror(-r)); | |
188 | return r; | |
189 | } | |
190 | ||
191 | if (id) | |
192 | sd_id128_from_string(id, &m->id); | |
193 | ||
194 | if (leader) | |
195 | parse_pid(leader, &m->leader); | |
196 | ||
197 | if (class) { | |
198 | MachineClass c; | |
199 | ||
200 | c = machine_class_from_string(class); | |
201 | if (c >= 0) | |
202 | m->class = c; | |
203 | } | |
204 | ||
205 | if (realtime) { | |
206 | unsigned long long l; | |
207 | if (sscanf(realtime, "%llu", &l) > 0) | |
208 | m->timestamp.realtime = l; | |
209 | } | |
210 | ||
211 | if (monotonic) { | |
212 | unsigned long long l; | |
213 | if (sscanf(monotonic, "%llu", &l) > 0) | |
214 | m->timestamp.monotonic = l; | |
215 | } | |
216 | ||
217 | return r; | |
218 | } | |
219 | ||
fb6becb4 LP |
220 | static int machine_start_scope(Machine *m) { |
221 | _cleanup_free_ char *description = NULL; | |
222 | DBusError error; | |
223 | char *job; | |
9444b1f2 LP |
224 | int r; |
225 | ||
226 | assert(m); | |
227 | ||
fb6becb4 | 228 | dbus_error_init(&error); |
9444b1f2 | 229 | |
fb6becb4 | 230 | if (!m->scope) { |
1ee306e1 | 231 | char *escaped = NULL; |
9444b1f2 | 232 | |
fb6becb4 | 233 | escaped = unit_name_escape(m->name); |
9444b1f2 LP |
234 | if (!escaped) |
235 | return log_oom(); | |
236 | ||
1ee306e1 LP |
237 | m->scope = strjoin("machine-", escaped, ".scope", NULL); |
238 | free(escaped); | |
239 | ||
fb6becb4 | 240 | if (!m->scope) |
9444b1f2 | 241 | return log_oom(); |
9444b1f2 | 242 | |
fb6becb4 | 243 | r = hashmap_put(m->manager->machine_units, m->scope, m); |
9444b1f2 | 244 | if (r < 0) |
fb6becb4 | 245 | log_warning("Failed to create mapping between unit and machine"); |
9444b1f2 LP |
246 | } |
247 | ||
fb6becb4 LP |
248 | description = strappend(m->class == MACHINE_VM ? "Virtual Machine " : "Container ", m->name); |
249 | ||
250 | r = manager_start_scope(m->manager, m->scope, m->leader, SPECIAL_MACHINE_SLICE, description, &error, &job); | |
251 | if (r < 0) { | |
252 | log_error("Failed to start machine scope: %s", bus_error(&error, r)); | |
253 | dbus_error_free(&error); | |
1ee306e1 LP |
254 | } else { |
255 | free(m->scope_job); | |
256 | m->scope_job = job; | |
9444b1f2 LP |
257 | } |
258 | ||
fb6becb4 | 259 | return r; |
9444b1f2 LP |
260 | } |
261 | ||
262 | int machine_start(Machine *m) { | |
263 | int r; | |
264 | ||
265 | assert(m); | |
266 | ||
267 | if (m->started) | |
268 | return 0; | |
269 | ||
fb6becb4 LP |
270 | /* Create cgroup */ |
271 | r = machine_start_scope(m); | |
272 | if (r < 0) | |
273 | return r; | |
274 | ||
9444b1f2 LP |
275 | log_struct(LOG_INFO, |
276 | MESSAGE_ID(SD_MESSAGE_MACHINE_START), | |
277 | "NAME=%s", m->name, | |
278 | "LEADER=%lu", (unsigned long) m->leader, | |
279 | "MESSAGE=New machine %s.", m->name, | |
280 | NULL); | |
281 | ||
9444b1f2 LP |
282 | if (!dual_timestamp_is_set(&m->timestamp)) |
283 | dual_timestamp_get(&m->timestamp); | |
284 | ||
285 | m->started = true; | |
286 | ||
287 | /* Save new machine data */ | |
288 | machine_save(m); | |
289 | ||
290 | machine_send_signal(m, true); | |
291 | ||
292 | return 0; | |
293 | } | |
294 | ||
fb6becb4 LP |
295 | static int machine_stop_scope(Machine *m) { |
296 | DBusError error; | |
297 | char *job; | |
9444b1f2 | 298 | int r; |
9444b1f2 LP |
299 | |
300 | assert(m); | |
301 | ||
fb6becb4 | 302 | dbus_error_init(&error); |
9444b1f2 | 303 | |
fb6becb4 LP |
304 | if (!m->scope) |
305 | return 0; | |
9444b1f2 | 306 | |
fb6becb4 LP |
307 | r = manager_stop_unit(m->manager, m->scope, &error, &job); |
308 | if (r < 0) { | |
309 | log_error("Failed to stop machine scope: %s", bus_error(&error, r)); | |
310 | dbus_error_free(&error); | |
311 | return r; | |
312 | } | |
9444b1f2 | 313 | |
fb6becb4 LP |
314 | free(m->scope_job); |
315 | m->scope_job = job; | |
9444b1f2 LP |
316 | |
317 | return r; | |
318 | } | |
319 | ||
320 | int machine_stop(Machine *m) { | |
321 | int r = 0, k; | |
322 | assert(m); | |
323 | ||
324 | if (m->started) | |
325 | log_struct(LOG_INFO, | |
326 | MESSAGE_ID(SD_MESSAGE_MACHINE_STOP), | |
327 | "NAME=%s", m->name, | |
328 | "LEADER=%lu", (unsigned long) m->leader, | |
329 | "MESSAGE=Machine %s terminated.", m->name, | |
330 | NULL); | |
331 | ||
332 | /* Kill cgroup */ | |
fb6becb4 | 333 | k = machine_stop_scope(m); |
9444b1f2 LP |
334 | if (k < 0) |
335 | r = k; | |
336 | ||
337 | unlink(m->state_file); | |
338 | machine_add_to_gc_queue(m); | |
339 | ||
340 | if (m->started) | |
341 | machine_send_signal(m, false); | |
342 | ||
343 | m->started = false; | |
344 | ||
345 | return r; | |
346 | } | |
347 | ||
348 | int machine_check_gc(Machine *m, bool drop_not_started) { | |
9444b1f2 LP |
349 | assert(m); |
350 | ||
351 | if (drop_not_started && !m->started) | |
352 | return 0; | |
353 | ||
fb6becb4 LP |
354 | if (m->scope_job) |
355 | return 1; | |
9444b1f2 | 356 | |
fb6becb4 LP |
357 | if (m->scope) |
358 | return manager_unit_is_active(m->manager, m->scope) != 0; | |
9444b1f2 LP |
359 | |
360 | return 0; | |
361 | } | |
362 | ||
363 | void machine_add_to_gc_queue(Machine *m) { | |
364 | assert(m); | |
365 | ||
366 | if (m->in_gc_queue) | |
367 | return; | |
368 | ||
369 | LIST_PREPEND(Machine, gc_queue, m->manager->machine_gc_queue, m); | |
370 | m->in_gc_queue = true; | |
371 | } | |
372 | ||
fb6becb4 LP |
373 | MachineState machine_get_state(Machine *s) { |
374 | assert(s); | |
9444b1f2 | 375 | |
fb6becb4 LP |
376 | if (s->scope_job) |
377 | return s->started ? MACHINE_OPENING : MACHINE_CLOSING; | |
9444b1f2 | 378 | |
fb6becb4 LP |
379 | return MACHINE_RUNNING; |
380 | } | |
9444b1f2 | 381 | |
fb6becb4 LP |
382 | int machine_kill(Machine *m, KillWho who, int signo) { |
383 | assert(m); | |
9444b1f2 | 384 | |
fb6becb4 LP |
385 | if (!m->scope) |
386 | return -ESRCH; | |
9444b1f2 | 387 | |
fb6becb4 | 388 | return manager_kill_unit(m->manager, m->scope, who, signo, NULL); |
9444b1f2 LP |
389 | } |
390 | ||
391 | static const char* const machine_class_table[_MACHINE_CLASS_MAX] = { | |
392 | [MACHINE_CONTAINER] = "container", | |
393 | [MACHINE_VM] = "vm" | |
394 | }; | |
395 | ||
396 | DEFINE_STRING_TABLE_LOOKUP(machine_class, MachineClass); | |
fb6becb4 LP |
397 | |
398 | static const char* const machine_state_table[_MACHINE_STATE_MAX] = { | |
399 | [MACHINE_OPENING] = "opening", | |
400 | [MACHINE_RUNNING] = "running", | |
401 | [MACHINE_CLOSING] = "closing" | |
402 | }; | |
403 | ||
404 | DEFINE_STRING_TABLE_LOOKUP(machine_state, MachineState); | |
1ee306e1 LP |
405 | |
406 | static const char* const kill_who_table[_KILL_WHO_MAX] = { | |
407 | [KILL_LEADER] = "leader", | |
408 | [KILL_ALL] = "all" | |
409 | }; | |
410 | ||
411 | DEFINE_STRING_TABLE_LOOKUP(kill_who, KillWho); |