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Commit | Line | Data |
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5cb5a6ff LP |
1 | /*-*- Mode: C; c-basic-offset: 8 -*-*/ |
2 | ||
83c60c9f LP |
3 | #include <sys/types.h> |
4 | #include <sys/stat.h> | |
5 | #include <unistd.h> | |
6 | #include <errno.h> | |
7 | #include <fcntl.h> | |
9152c765 | 8 | #include <sys/poll.h> |
034c6ed7 | 9 | #include <signal.h> |
83c60c9f | 10 | |
87f0e418 | 11 | #include "unit.h" |
5cb5a6ff | 12 | #include "socket.h" |
83c60c9f LP |
13 | #include "log.h" |
14 | ||
acbb0225 | 15 | static const UnitActiveState state_translation_table[_SOCKET_STATE_MAX] = { |
87f0e418 LP |
16 | [SOCKET_DEAD] = UNIT_INACTIVE, |
17 | [SOCKET_START_PRE] = UNIT_ACTIVATING, | |
18 | [SOCKET_START_POST] = UNIT_ACTIVATING, | |
19 | [SOCKET_LISTENING] = UNIT_ACTIVE, | |
20 | [SOCKET_RUNNING] = UNIT_ACTIVE, | |
21 | [SOCKET_STOP_PRE] = UNIT_DEACTIVATING, | |
22 | [SOCKET_STOP_PRE_SIGTERM] = UNIT_DEACTIVATING, | |
23 | [SOCKET_STOP_PRE_SIGKILL] = UNIT_DEACTIVATING, | |
24 | [SOCKET_STOP_POST] = UNIT_DEACTIVATING, | |
25 | [SOCKET_STOP_POST_SIGTERM] = UNIT_DEACTIVATING, | |
26 | [SOCKET_STOP_POST_SIGKILL] = UNIT_DEACTIVATING, | |
27 | [SOCKET_MAINTAINANCE] = UNIT_INACTIVE, | |
83c60c9f | 28 | }; |
5cb5a6ff | 29 | |
acbb0225 LP |
30 | static const char* const state_string_table[_SOCKET_STATE_MAX] = { |
31 | [SOCKET_DEAD] = "dead", | |
32 | [SOCKET_START_PRE] = "start-pre", | |
33 | [SOCKET_START_POST] = "start-post", | |
34 | [SOCKET_LISTENING] = "listening", | |
35 | [SOCKET_RUNNING] = "running", | |
36 | [SOCKET_STOP_PRE] = "stop-pre", | |
37 | [SOCKET_STOP_PRE_SIGTERM] = "stop-pre-sigterm", | |
38 | [SOCKET_STOP_PRE_SIGKILL] = "stop-pre-sigkill", | |
39 | [SOCKET_STOP_POST] = "stop-post", | |
40 | [SOCKET_STOP_POST_SIGTERM] = "stop-post-sigterm", | |
41 | [SOCKET_STOP_POST_SIGKILL] = "stop-post-sigkill", | |
42 | [SOCKET_MAINTAINANCE] = "maintainance" | |
43 | }; | |
44 | ||
87f0e418 LP |
45 | static void socket_done(Unit *u) { |
46 | Socket *s = SOCKET(u); | |
034c6ed7 LP |
47 | SocketPort *p; |
48 | ||
49 | assert(s); | |
50 | ||
51 | while ((p = s->ports)) { | |
52 | LIST_REMOVE(SocketPort, port, s->ports, p); | |
53 | ||
54 | if (p->fd >= 0) | |
55 | close_nointr(p->fd); | |
56 | free(p->path); | |
57 | free(p); | |
58 | } | |
59 | ||
60 | exec_context_done(&s->exec_context); | |
61 | exec_command_free_array(s->exec_command, _SOCKET_EXEC_MAX); | |
62 | s->control_command = NULL; | |
63 | ||
64 | if (s->control_pid > 0) { | |
87f0e418 | 65 | unit_unwatch_pid(u, s->control_pid); |
034c6ed7 LP |
66 | s->control_pid = 0; |
67 | } | |
68 | ||
69 | s->service = NULL; | |
70 | ||
acbb0225 LP |
71 | free(s->bind_to_device); |
72 | ||
73 | unit_unwatch_timer(u, &s->timer_watch); | |
5cb5a6ff LP |
74 | } |
75 | ||
87f0e418 LP |
76 | static int socket_init(Unit *u) { |
77 | Socket *s = SOCKET(u); | |
44d8db9e LP |
78 | char *t; |
79 | int r; | |
80 | ||
81 | /* First, reset everything to the defaults, in case this is a | |
82 | * reload */ | |
83 | ||
84 | s->state = 0; | |
acbb0225 | 85 | s->timer_watch.type = WATCH_INVALID; |
44d8db9e LP |
86 | s->bind_ipv6_only = false; |
87 | s->backlog = SOMAXCONN; | |
88 | s->timeout_usec = DEFAULT_TIMEOUT_USEC; | |
89 | exec_context_init(&s->exec_context); | |
90 | ||
87f0e418 | 91 | if ((r = unit_load_fragment_and_dropin(u)) < 0) |
44d8db9e LP |
92 | goto fail; |
93 | ||
87f0e418 | 94 | if (!(t = unit_name_change_suffix(unit_id(u), ".service"))) { |
44d8db9e LP |
95 | r = -ENOMEM; |
96 | goto fail; | |
97 | } | |
98 | ||
87f0e418 | 99 | r = manager_load_unit(u->meta.manager, t, (Unit**) &s->service); |
44d8db9e LP |
100 | free(t); |
101 | ||
102 | if (r < 0) | |
103 | goto fail; | |
104 | ||
87f0e418 | 105 | if ((r = unit_add_dependency(u, UNIT_BEFORE, UNIT(s->service))) < 0) |
44d8db9e LP |
106 | goto fail; |
107 | ||
108 | return 0; | |
109 | ||
110 | fail: | |
87f0e418 | 111 | socket_done(u); |
44d8db9e LP |
112 | return r; |
113 | } | |
114 | ||
542563ba LP |
115 | static const char* listen_lookup(int type) { |
116 | ||
117 | if (type == SOCK_STREAM) | |
118 | return "ListenStream"; | |
119 | else if (type == SOCK_DGRAM) | |
120 | return "ListenDatagram"; | |
121 | else if (type == SOCK_SEQPACKET) | |
122 | return "ListenSequentialPacket"; | |
123 | ||
034c6ed7 | 124 | assert_not_reached("Unknown socket type"); |
542563ba LP |
125 | return NULL; |
126 | } | |
127 | ||
87f0e418 | 128 | static void socket_dump(Unit *u, FILE *f, const char *prefix) { |
5cb5a6ff | 129 | |
5cb5a6ff LP |
130 | static const char* const command_table[_SOCKET_EXEC_MAX] = { |
131 | [SOCKET_EXEC_START_PRE] = "StartPre", | |
132 | [SOCKET_EXEC_START_POST] = "StartPost", | |
133 | [SOCKET_EXEC_STOP_PRE] = "StopPre", | |
134 | [SOCKET_EXEC_STOP_POST] = "StopPost" | |
135 | }; | |
136 | ||
137 | SocketExecCommand c; | |
87f0e418 | 138 | Socket *s = SOCKET(u); |
542563ba | 139 | SocketPort *p; |
c43d20a0 | 140 | char *prefix2; |
5cb5a6ff LP |
141 | |
142 | assert(s); | |
fa068367 | 143 | assert(f); |
5cb5a6ff | 144 | |
c43d20a0 LP |
145 | prefix2 = strappend(prefix, "\t"); |
146 | if (!prefix2) | |
147 | prefix2 = ""; | |
148 | ||
5cb5a6ff LP |
149 | fprintf(f, |
150 | "%sSocket State: %s\n" | |
542563ba LP |
151 | "%sBindIPv6Only: %s\n" |
152 | "%sBacklog: %u\n", | |
acbb0225 | 153 | prefix, state_string_table[s->state], |
542563ba LP |
154 | prefix, yes_no(s->bind_ipv6_only), |
155 | prefix, s->backlog); | |
156 | ||
acbb0225 LP |
157 | if (s->bind_to_device) |
158 | fprintf(f, | |
159 | "%sBindToDevice: %s\n", | |
160 | prefix, s->bind_to_device); | |
161 | ||
034c6ed7 | 162 | LIST_FOREACH(port, p, s->ports) { |
5cb5a6ff | 163 | |
542563ba LP |
164 | if (p->type == SOCKET_SOCKET) { |
165 | const char *t; | |
166 | int r; | |
167 | char *k; | |
168 | ||
169 | if ((r = socket_address_print(&p->address, &k)) < 0) | |
170 | t = strerror(-r); | |
171 | else | |
172 | t = k; | |
173 | ||
174 | fprintf(f, "%s%s: %s\n", prefix, listen_lookup(p->address.type), k); | |
175 | free(k); | |
176 | } else | |
177 | fprintf(f, "%sListenFIFO: %s\n", prefix, p->path); | |
178 | } | |
5cb5a6ff LP |
179 | |
180 | exec_context_dump(&s->exec_context, f, prefix); | |
181 | ||
182 | for (c = 0; c < _SOCKET_EXEC_MAX; c++) { | |
c43d20a0 LP |
183 | if (!s->exec_command[c]) |
184 | continue; | |
5cb5a6ff | 185 | |
c43d20a0 LP |
186 | fprintf(f, "%s→ %s:\n", |
187 | prefix, command_table[c]); | |
188 | ||
189 | exec_command_dump_list(s->exec_command[c], f, prefix2); | |
5cb5a6ff | 190 | } |
c43d20a0 LP |
191 | |
192 | free(prefix2); | |
5cb5a6ff LP |
193 | } |
194 | ||
034c6ed7 | 195 | static void socket_close_fds(Socket *s) { |
83c60c9f LP |
196 | SocketPort *p; |
197 | ||
198 | assert(s); | |
199 | ||
034c6ed7 | 200 | LIST_FOREACH(port, p, s->ports) { |
83c60c9f LP |
201 | if (p->fd < 0) |
202 | continue; | |
203 | ||
acbb0225 | 204 | unit_unwatch_fd(UNIT(s), &p->fd_watch); |
9152c765 LP |
205 | assert_se(close_nointr(p->fd) >= 0); |
206 | ||
83c60c9f LP |
207 | p->fd = -1; |
208 | } | |
209 | } | |
210 | ||
034c6ed7 | 211 | static int socket_open_fds(Socket *s) { |
83c60c9f LP |
212 | SocketPort *p; |
213 | int r; | |
214 | ||
215 | assert(s); | |
216 | ||
034c6ed7 | 217 | LIST_FOREACH(port, p, s->ports) { |
83c60c9f | 218 | |
034c6ed7 LP |
219 | if (p->fd >= 0) |
220 | continue; | |
83c60c9f LP |
221 | |
222 | if (p->type == SOCKET_SOCKET) { | |
223 | ||
acbb0225 | 224 | if ((r = socket_address_listen(&p->address, s->backlog, s->bind_ipv6_only, s->bind_to_device, &p->fd)) < 0) |
83c60c9f LP |
225 | goto rollback; |
226 | ||
227 | } else { | |
228 | struct stat st; | |
229 | assert(p->type == SOCKET_FIFO); | |
230 | ||
231 | if (mkfifo(p->path, 0666 & ~s->exec_context.umask) < 0 && errno != EEXIST) { | |
232 | r = -errno; | |
233 | goto rollback; | |
234 | } | |
235 | ||
236 | if ((p->fd = open(p->path, O_RDWR|O_CLOEXEC|O_NOCTTY|O_NONBLOCK|O_NOFOLLOW)) < 0) { | |
237 | r = -errno; | |
238 | goto rollback; | |
239 | } | |
240 | ||
241 | if (fstat(p->fd, &st) < 0) { | |
242 | r = -errno; | |
243 | goto rollback; | |
244 | } | |
245 | ||
246 | /* FIXME verify user, access mode */ | |
247 | ||
248 | if (!S_ISFIFO(st.st_mode)) { | |
249 | r = -EEXIST; | |
250 | goto rollback; | |
251 | } | |
252 | } | |
034c6ed7 LP |
253 | } |
254 | ||
255 | return 0; | |
256 | ||
257 | rollback: | |
258 | socket_close_fds(s); | |
259 | return r; | |
260 | } | |
261 | ||
262 | static void socket_unwatch_fds(Socket *s) { | |
263 | SocketPort *p; | |
9152c765 | 264 | |
034c6ed7 LP |
265 | assert(s); |
266 | ||
267 | LIST_FOREACH(port, p, s->ports) { | |
268 | if (p->fd < 0) | |
269 | continue; | |
270 | ||
acbb0225 | 271 | unit_unwatch_fd(UNIT(s), &p->fd_watch); |
83c60c9f | 272 | } |
034c6ed7 LP |
273 | } |
274 | ||
275 | static int socket_watch_fds(Socket *s) { | |
276 | SocketPort *p; | |
277 | int r; | |
278 | ||
279 | assert(s); | |
83c60c9f | 280 | |
034c6ed7 LP |
281 | LIST_FOREACH(port, p, s->ports) { |
282 | if (p->fd < 0) | |
283 | continue; | |
284 | ||
acbb0225 | 285 | if ((r = unit_watch_fd(UNIT(s), p->fd, POLLIN, &p->fd_watch)) < 0) |
034c6ed7 LP |
286 | goto fail; |
287 | } | |
83c60c9f | 288 | |
542563ba | 289 | return 0; |
83c60c9f | 290 | |
034c6ed7 LP |
291 | fail: |
292 | socket_unwatch_fds(s); | |
293 | return r; | |
294 | } | |
295 | ||
296 | static void socket_set_state(Socket *s, SocketState state) { | |
297 | SocketState old_state; | |
298 | assert(s); | |
299 | ||
300 | old_state = s->state; | |
301 | s->state = state; | |
302 | ||
303 | if (state != SOCKET_START_PRE && | |
304 | state != SOCKET_START_POST && | |
305 | state != SOCKET_STOP_PRE && | |
306 | state != SOCKET_STOP_PRE_SIGTERM && | |
307 | state != SOCKET_STOP_PRE_SIGKILL && | |
308 | state != SOCKET_STOP_POST && | |
309 | state != SOCKET_STOP_POST_SIGTERM && | |
310 | state != SOCKET_STOP_POST_SIGKILL) | |
acbb0225 | 311 | unit_unwatch_timer(UNIT(s), &s->timer_watch); |
034c6ed7 LP |
312 | |
313 | if (state != SOCKET_START_PRE && | |
314 | state != SOCKET_START_POST && | |
315 | state != SOCKET_STOP_PRE && | |
316 | state != SOCKET_STOP_PRE_SIGTERM && | |
317 | state != SOCKET_STOP_PRE_SIGKILL && | |
318 | state != SOCKET_STOP_POST && | |
319 | state != SOCKET_STOP_POST_SIGTERM && | |
320 | state != SOCKET_STOP_POST_SIGKILL) | |
acbb0225 | 321 | if (s->control_pid > 0) { |
87f0e418 | 322 | unit_unwatch_pid(UNIT(s), s->control_pid); |
034c6ed7 LP |
323 | s->control_pid = 0; |
324 | } | |
325 | ||
326 | if (state != SOCKET_START_PRE && | |
327 | state != SOCKET_START_POST && | |
328 | state != SOCKET_STOP_PRE && | |
329 | state != SOCKET_STOP_POST) | |
330 | s->control_command = NULL; | |
331 | ||
332 | if (state != SOCKET_START_POST && | |
333 | state != SOCKET_LISTENING && | |
334 | state != SOCKET_RUNNING && | |
335 | state != SOCKET_STOP_PRE && | |
336 | state != SOCKET_STOP_PRE_SIGTERM && | |
337 | state != SOCKET_STOP_PRE_SIGKILL) | |
338 | socket_close_fds(s); | |
339 | ||
340 | if (state != SOCKET_LISTENING) | |
341 | socket_unwatch_fds(s); | |
342 | ||
acbb0225 LP |
343 | log_debug("%s changing %s → %s", unit_id(UNIT(s)), state_string_table[old_state], state_string_table[state]); |
344 | ||
345 | unit_notify(UNIT(s), state_translation_table[old_state], state_translation_table[state]); | |
034c6ed7 LP |
346 | } |
347 | ||
348 | static int socket_spawn(Socket *s, ExecCommand *c, bool timeout, pid_t *_pid) { | |
349 | pid_t pid; | |
350 | int r; | |
351 | ||
352 | assert(s); | |
353 | assert(c); | |
354 | assert(_pid); | |
355 | ||
356 | if (timeout) { | |
acbb0225 | 357 | if ((r = unit_watch_timer(UNIT(s), s->timeout_usec, &s->timer_watch)) < 0) |
034c6ed7 LP |
358 | goto fail; |
359 | } else | |
acbb0225 | 360 | unit_unwatch_timer(UNIT(s), &s->timer_watch); |
034c6ed7 LP |
361 | |
362 | if ((r = exec_spawn(c, &s->exec_context, NULL, 0, &pid)) < 0) | |
363 | goto fail; | |
364 | ||
87f0e418 | 365 | if ((r = unit_watch_pid(UNIT(s), pid)) < 0) |
034c6ed7 LP |
366 | /* FIXME: we need to do something here */ |
367 | goto fail; | |
83c60c9f | 368 | |
034c6ed7 LP |
369 | *_pid = pid; |
370 | ||
371 | return 0; | |
372 | ||
373 | fail: | |
374 | if (timeout) | |
acbb0225 | 375 | unit_unwatch_timer(UNIT(s), &s->timer_watch); |
83c60c9f LP |
376 | |
377 | return r; | |
542563ba LP |
378 | } |
379 | ||
034c6ed7 LP |
380 | static void socket_enter_dead(Socket *s, bool success) { |
381 | assert(s); | |
382 | ||
383 | if (!success) | |
384 | s->failure = true; | |
385 | ||
386 | socket_set_state(s, s->failure ? SOCKET_MAINTAINANCE : SOCKET_DEAD); | |
387 | } | |
388 | ||
389 | static void socket_enter_stop_post(Socket *s, bool success) { | |
390 | int r; | |
391 | assert(s); | |
392 | ||
393 | if (!success) | |
394 | s->failure = true; | |
395 | ||
396 | if ((s->control_command = s->exec_command[SOCKET_EXEC_STOP_POST])) { | |
397 | ||
398 | if ((r = socket_spawn(s, s->control_command, true, &s->control_pid)) < 0) | |
399 | goto fail; | |
400 | ||
401 | socket_set_state(s, SOCKET_STOP_POST); | |
402 | } else | |
403 | socket_enter_dead(s, true); | |
404 | ||
405 | return; | |
406 | ||
407 | fail: | |
87f0e418 | 408 | log_warning("%s failed to run stop-post executable: %s", unit_id(UNIT(s)), strerror(-r)); |
034c6ed7 LP |
409 | socket_enter_dead(s, false); |
410 | } | |
411 | ||
412 | static void socket_enter_signal(Socket *s, SocketState state, bool success) { | |
413 | int r; | |
414 | ||
415 | assert(s); | |
416 | ||
417 | if (!success) | |
418 | s->failure = true; | |
419 | ||
420 | if (s->control_pid > 0) { | |
421 | int sig; | |
422 | ||
423 | sig = (state == SOCKET_STOP_PRE_SIGTERM || state == SOCKET_STOP_POST_SIGTERM) ? SIGTERM : SIGKILL; | |
424 | ||
425 | if (kill(s->control_pid, sig) < 0 && errno != ESRCH) { | |
426 | r = -errno; | |
427 | goto fail; | |
428 | } | |
429 | ||
430 | socket_set_state(s, state); | |
431 | } else | |
432 | socket_enter_dead(s, true); | |
433 | ||
434 | return; | |
435 | ||
436 | fail: | |
87f0e418 | 437 | log_warning("%s failed to kill processes: %s", unit_id(UNIT(s)), strerror(-r)); |
034c6ed7 LP |
438 | |
439 | if (state == SOCKET_STOP_PRE_SIGTERM || state == SOCKET_STOP_PRE_SIGKILL) | |
440 | socket_enter_stop_post(s, false); | |
441 | else | |
442 | socket_enter_dead(s, false); | |
443 | } | |
444 | ||
445 | static void socket_enter_stop_pre(Socket *s, bool success) { | |
446 | int r; | |
447 | assert(s); | |
448 | ||
449 | if (!success) | |
450 | s->failure = true; | |
451 | ||
452 | if ((s->control_command = s->exec_command[SOCKET_EXEC_STOP_PRE])) { | |
453 | ||
454 | if ((r = socket_spawn(s, s->control_command, true, &s->control_pid)) < 0) | |
455 | goto fail; | |
456 | ||
457 | socket_set_state(s, SOCKET_STOP_PRE); | |
458 | } else | |
459 | socket_enter_stop_post(s, true); | |
460 | ||
461 | return; | |
462 | ||
463 | fail: | |
87f0e418 | 464 | log_warning("%s failed to run stop-pre executable: %s", unit_id(UNIT(s)), strerror(-r)); |
034c6ed7 LP |
465 | socket_enter_stop_post(s, false); |
466 | } | |
467 | ||
e9af15c3 LP |
468 | static void socket_enter_listening(Socket *s) { |
469 | int r; | |
470 | assert(s); | |
471 | ||
472 | if ((r = socket_watch_fds(s)) < 0) { | |
473 | log_warning("%s failed to watch sockets: %s", unit_id(UNIT(s)), strerror(-r)); | |
474 | goto fail; | |
475 | } | |
476 | ||
477 | socket_set_state(s, SOCKET_LISTENING); | |
478 | return; | |
479 | ||
480 | fail: | |
481 | socket_enter_stop_pre(s, false); | |
482 | } | |
483 | ||
034c6ed7 LP |
484 | static void socket_enter_start_post(Socket *s) { |
485 | int r; | |
486 | assert(s); | |
487 | ||
e9af15c3 | 488 | if ((r = socket_open_fds(s)) < 0) { |
87f0e418 | 489 | log_warning("%s failed to listen on sockets: %s", unit_id(UNIT(s)), strerror(-r)); |
034c6ed7 LP |
490 | goto fail; |
491 | } | |
492 | ||
493 | if ((s->control_command = s->exec_command[SOCKET_EXEC_START_POST])) { | |
494 | ||
495 | if ((r = socket_spawn(s, s->control_command, true, &s->control_pid)) < 0) { | |
87f0e418 | 496 | log_warning("%s failed to run start-post executable: %s", unit_id(UNIT(s)), strerror(-r)); |
034c6ed7 LP |
497 | goto fail; |
498 | } | |
499 | ||
500 | socket_set_state(s, SOCKET_START_POST); | |
501 | } else | |
e9af15c3 | 502 | socket_enter_listening(s); |
034c6ed7 LP |
503 | |
504 | return; | |
505 | ||
506 | fail: | |
507 | socket_enter_stop_pre(s, false); | |
508 | } | |
509 | ||
510 | static void socket_enter_start_pre(Socket *s) { | |
511 | int r; | |
512 | assert(s); | |
513 | ||
514 | if ((s->control_command = s->exec_command[SOCKET_EXEC_START_PRE])) { | |
515 | ||
516 | if ((r = socket_spawn(s, s->control_command, true, &s->control_pid)) < 0) | |
517 | goto fail; | |
518 | ||
519 | socket_set_state(s, SOCKET_START_PRE); | |
520 | } else | |
521 | socket_enter_start_post(s); | |
522 | ||
523 | return; | |
524 | ||
525 | fail: | |
87f0e418 | 526 | log_warning("%s failed to run start-pre exectuable: %s", unit_id(UNIT(s)), strerror(-r)); |
034c6ed7 LP |
527 | socket_enter_dead(s, false); |
528 | } | |
529 | ||
530 | static void socket_enter_running(Socket *s) { | |
531 | int r; | |
532 | ||
533 | assert(s); | |
534 | ||
87f0e418 | 535 | if ((r = manager_add_job(UNIT(s)->meta.manager, JOB_START, UNIT(s->service), JOB_REPLACE, true, NULL)) < 0) |
034c6ed7 LP |
536 | goto fail; |
537 | ||
538 | socket_set_state(s, SOCKET_RUNNING); | |
539 | return; | |
540 | ||
541 | fail: | |
87f0e418 | 542 | log_warning("%s failed to queue socket startup job: %s", unit_id(UNIT(s)), strerror(-r)); |
034c6ed7 LP |
543 | socket_enter_dead(s, false); |
544 | } | |
545 | ||
546 | static void socket_run_next(Socket *s, bool success) { | |
547 | int r; | |
548 | ||
549 | assert(s); | |
550 | assert(s->control_command); | |
551 | assert(s->control_command->command_next); | |
552 | ||
553 | if (!success) | |
554 | s->failure = true; | |
555 | ||
556 | s->control_command = s->control_command->command_next; | |
557 | ||
558 | if ((r = socket_spawn(s, s->control_command, true, &s->control_pid)) < 0) | |
559 | goto fail; | |
560 | ||
561 | return; | |
562 | ||
563 | fail: | |
564 | if (s->state == SOCKET_STOP_PRE) | |
565 | socket_enter_stop_post(s, false); | |
566 | else if (s->state == SOCKET_STOP_POST) | |
567 | socket_enter_dead(s, false); | |
568 | else | |
569 | socket_enter_stop_pre(s, false); | |
570 | } | |
571 | ||
87f0e418 LP |
572 | static int socket_start(Unit *u) { |
573 | Socket *s = SOCKET(u); | |
83c60c9f LP |
574 | |
575 | assert(s); | |
576 | ||
034c6ed7 LP |
577 | /* We cannot fulfill this request right now, try again later |
578 | * please! */ | |
579 | if (s->state == SOCKET_STOP_PRE || | |
580 | s->state == SOCKET_STOP_PRE_SIGKILL || | |
581 | s->state == SOCKET_STOP_PRE_SIGTERM || | |
582 | s->state == SOCKET_STOP_POST || | |
583 | s->state == SOCKET_STOP_POST_SIGTERM || | |
584 | s->state == SOCKET_STOP_POST_SIGKILL) | |
585 | return -EAGAIN; | |
586 | ||
83c60c9f LP |
587 | if (s->state == SOCKET_START_PRE || |
588 | s->state == SOCKET_START_POST) | |
034c6ed7 | 589 | return 0; |
83c60c9f | 590 | |
034c6ed7 | 591 | /* Cannot run this without the service being around */ |
87f0e418 | 592 | if (s->service->meta.load_state != UNIT_LOADED) |
034c6ed7 | 593 | return -ENOENT; |
83c60c9f | 594 | |
034c6ed7 | 595 | assert(s->state == SOCKET_DEAD || s->state == SOCKET_MAINTAINANCE); |
83c60c9f | 596 | |
034c6ed7 LP |
597 | s->failure = false; |
598 | socket_enter_start_pre(s); | |
599 | return 0; | |
600 | } | |
83c60c9f | 601 | |
87f0e418 LP |
602 | static int socket_stop(Unit *u) { |
603 | Socket *s = SOCKET(u); | |
034c6ed7 LP |
604 | |
605 | assert(s); | |
606 | ||
607 | /* We cannot fulfill this request right now, try again later | |
608 | * please! */ | |
609 | if (s->state == SOCKET_START_PRE || | |
610 | s->state == SOCKET_START_POST) | |
611 | return -EAGAIN; | |
83c60c9f | 612 | |
034c6ed7 | 613 | assert(s->state == SOCKET_LISTENING || s->state == SOCKET_RUNNING); |
83c60c9f | 614 | |
034c6ed7 | 615 | socket_enter_stop_pre(s, true); |
542563ba LP |
616 | return 0; |
617 | } | |
618 | ||
87f0e418 LP |
619 | static UnitActiveState socket_active_state(Unit *u) { |
620 | assert(u); | |
5cb5a6ff | 621 | |
acbb0225 | 622 | return state_translation_table[SOCKET(u)->state]; |
5cb5a6ff LP |
623 | } |
624 | ||
acbb0225 | 625 | static void socket_fd_event(Unit *u, int fd, uint32_t events, Watch *w) { |
87f0e418 | 626 | Socket *s = SOCKET(u); |
9152c765 | 627 | |
034c6ed7 | 628 | assert(s); |
9152c765 | 629 | |
e9af15c3 | 630 | log_debug("Incoming traffic on %s", unit_id(u)); |
9152c765 | 631 | |
034c6ed7 LP |
632 | if (events != POLLIN) |
633 | socket_enter_stop_pre(s, false); | |
9152c765 | 634 | |
034c6ed7 | 635 | socket_enter_running(s); |
9152c765 LP |
636 | } |
637 | ||
87f0e418 LP |
638 | static void socket_sigchld_event(Unit *u, pid_t pid, int code, int status) { |
639 | Socket *s = SOCKET(u); | |
034c6ed7 | 640 | bool success; |
5cb5a6ff LP |
641 | |
642 | assert(s); | |
034c6ed7 | 643 | assert(pid >= 0); |
5cb5a6ff | 644 | |
bd982a8b | 645 | success = code == CLD_EXITED && status == 0; |
034c6ed7 | 646 | s->failure = s->failure || !success; |
542563ba | 647 | |
034c6ed7 LP |
648 | assert(s->control_pid == pid); |
649 | assert(s->control_command); | |
650 | ||
651 | exec_status_fill(&s->control_command->exec_status, pid, code, status); | |
652 | s->control_pid = 0; | |
653 | ||
acbb0225 | 654 | log_debug("%s control process exited, code=%s status=%i", unit_id(u), sigchld_code(code), status); |
034c6ed7 LP |
655 | |
656 | if (s->control_command->command_next && | |
acbb0225 LP |
657 | (success || (s->state == SOCKET_EXEC_STOP_PRE || s->state == SOCKET_EXEC_STOP_POST))) { |
658 | log_debug("%s running next command for the state %s", unit_id(u), state_string_table[s->state]); | |
034c6ed7 | 659 | socket_run_next(s, success); |
acbb0225 | 660 | } else { |
034c6ed7 LP |
661 | /* No further commands for this step, so let's figure |
662 | * out what to do next */ | |
5cb5a6ff | 663 | |
bd982a8b | 664 | log_debug("%s got final SIGCHLD for state %s", unit_id(u), state_string_table[s->state]); |
acbb0225 | 665 | |
034c6ed7 LP |
666 | switch (s->state) { |
667 | ||
668 | case SOCKET_START_PRE: | |
669 | if (success) | |
acbb0225 | 670 | socket_enter_start_post(s); |
034c6ed7 LP |
671 | else |
672 | socket_enter_stop_pre(s, false); | |
673 | break; | |
674 | ||
675 | case SOCKET_START_POST: | |
676 | if (success) | |
e9af15c3 | 677 | socket_enter_listening(s); |
034c6ed7 LP |
678 | else |
679 | socket_enter_stop_pre(s, false); | |
680 | break; | |
681 | ||
682 | case SOCKET_STOP_PRE: | |
683 | case SOCKET_STOP_PRE_SIGTERM: | |
684 | case SOCKET_STOP_PRE_SIGKILL: | |
685 | socket_enter_stop_post(s, success); | |
686 | break; | |
687 | ||
688 | case SOCKET_STOP_POST: | |
689 | case SOCKET_STOP_POST_SIGTERM: | |
690 | case SOCKET_STOP_POST_SIGKILL: | |
691 | socket_enter_dead(s, success); | |
692 | break; | |
693 | ||
694 | default: | |
695 | assert_not_reached("Uh, control process died at wrong time."); | |
696 | } | |
697 | } | |
698 | } | |
5cb5a6ff | 699 | |
acbb0225 | 700 | static void socket_timer_event(Unit *u, uint64_t elapsed, Watch *w) { |
87f0e418 | 701 | Socket *s = SOCKET(u); |
5cb5a6ff | 702 | |
034c6ed7 LP |
703 | assert(s); |
704 | assert(elapsed == 1); | |
705 | ||
acbb0225 | 706 | assert(w == &s->timer_watch); |
034c6ed7 LP |
707 | |
708 | switch (s->state) { | |
709 | ||
710 | case SOCKET_START_PRE: | |
711 | case SOCKET_START_POST: | |
87f0e418 | 712 | log_warning("%s operation timed out. Stopping.", unit_id(u)); |
034c6ed7 LP |
713 | socket_enter_stop_pre(s, false); |
714 | break; | |
715 | ||
716 | case SOCKET_STOP_PRE: | |
87f0e418 | 717 | log_warning("%s stopping timed out. Terminating.", unit_id(u)); |
034c6ed7 LP |
718 | socket_enter_signal(s, SOCKET_STOP_PRE_SIGTERM, false); |
719 | break; | |
720 | ||
721 | case SOCKET_STOP_PRE_SIGTERM: | |
87f0e418 | 722 | log_warning("%s stopping timed out. Killing.", unit_id(u)); |
034c6ed7 LP |
723 | socket_enter_signal(s, SOCKET_STOP_PRE_SIGKILL, false); |
724 | break; | |
725 | ||
726 | case SOCKET_STOP_PRE_SIGKILL: | |
87f0e418 | 727 | log_warning("%s still around after SIGKILL. Ignoring.", unit_id(u)); |
034c6ed7 LP |
728 | socket_enter_stop_post(s, false); |
729 | break; | |
730 | ||
731 | case SOCKET_STOP_POST: | |
87f0e418 | 732 | log_warning("%s stopping timed out (2). Terminating.", unit_id(u)); |
034c6ed7 LP |
733 | socket_enter_signal(s, SOCKET_STOP_POST_SIGTERM, false); |
734 | break; | |
735 | ||
736 | case SOCKET_STOP_POST_SIGTERM: | |
87f0e418 | 737 | log_warning("%s stopping timed out (2). Killing.", unit_id(u)); |
034c6ed7 LP |
738 | socket_enter_signal(s, SOCKET_STOP_POST_SIGKILL, false); |
739 | break; | |
740 | ||
741 | case SOCKET_STOP_POST_SIGKILL: | |
87f0e418 | 742 | log_warning("%s still around after SIGKILL (2). Entering maintainance mode.", unit_id(u)); |
034c6ed7 LP |
743 | socket_enter_dead(s, false); |
744 | break; | |
745 | ||
746 | default: | |
747 | assert_not_reached("Timeout at wrong time."); | |
748 | } | |
5cb5a6ff LP |
749 | } |
750 | ||
44d8db9e LP |
751 | int socket_collect_fds(Socket *s, int **fds, unsigned *n_fds) { |
752 | int *rfds; | |
753 | unsigned rn_fds, k; | |
754 | SocketPort *p; | |
755 | ||
756 | assert(s); | |
757 | assert(fds); | |
758 | assert(n_fds); | |
759 | ||
760 | /* Called from the service code for requesting our fds */ | |
761 | ||
762 | rn_fds = 0; | |
763 | LIST_FOREACH(port, p, s->ports) | |
764 | if (p->fd >= 0) | |
765 | rn_fds++; | |
766 | ||
767 | if (!(rfds = new(int, rn_fds)) < 0) | |
768 | return -ENOMEM; | |
769 | ||
770 | k = 0; | |
771 | LIST_FOREACH(port, p, s->ports) | |
772 | if (p->fd >= 0) | |
773 | rfds[k++] = p->fd; | |
774 | ||
775 | assert(k == rn_fds); | |
776 | ||
777 | *fds = rfds; | |
778 | *n_fds = rn_fds; | |
779 | ||
780 | return 0; | |
781 | } | |
782 | ||
ceee3d82 LP |
783 | void socket_notify_service_dead(Socket *s) { |
784 | assert(s); | |
785 | ||
786 | /* The service is dead. Dang. */ | |
787 | ||
788 | if (s->state == SOCKET_RUNNING) { | |
789 | log_debug("%s got notified about service death.", unit_id(UNIT(s))); | |
790 | socket_enter_listening(s); | |
791 | } | |
792 | } | |
793 | ||
87f0e418 | 794 | const UnitVTable socket_vtable = { |
5cb5a6ff LP |
795 | .suffix = ".socket", |
796 | ||
034c6ed7 LP |
797 | .init = socket_init, |
798 | .done = socket_done, | |
799 | ||
5cb5a6ff LP |
800 | .dump = socket_dump, |
801 | ||
542563ba LP |
802 | .start = socket_start, |
803 | .stop = socket_stop, | |
5cb5a6ff LP |
804 | |
805 | .active_state = socket_active_state, | |
806 | ||
9152c765 | 807 | .fd_event = socket_fd_event, |
034c6ed7 LP |
808 | .sigchld_event = socket_sigchld_event, |
809 | .timer_event = socket_timer_event | |
5cb5a6ff | 810 | }; |