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Commit | Line | Data |
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5cb5a6ff LP |
1 | /*-*- Mode: C; c-basic-offset: 8 -*-*/ |
2 | ||
a7334b09 LP |
3 | /*** |
4 | This file is part of systemd. | |
5 | ||
6 | Copyright 2010 Lennart Poettering | |
7 | ||
8 | systemd is free software; you can redistribute it and/or modify it | |
9 | under the terms of the GNU General Public License as published by | |
10 | the Free Software Foundation; either version 2 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 | General Public License for more details. | |
17 | ||
18 | You should have received a copy of the GNU General Public License | |
19 | along with systemd; If not, see <http://www.gnu.org/licenses/>. | |
20 | ***/ | |
21 | ||
83c60c9f LP |
22 | #include <sys/types.h> |
23 | #include <sys/stat.h> | |
24 | #include <unistd.h> | |
25 | #include <errno.h> | |
26 | #include <fcntl.h> | |
f94ea366 | 27 | #include <sys/epoll.h> |
034c6ed7 | 28 | #include <signal.h> |
83c60c9f | 29 | |
87f0e418 | 30 | #include "unit.h" |
5cb5a6ff | 31 | #include "socket.h" |
83c60c9f LP |
32 | #include "log.h" |
33 | ||
acbb0225 | 34 | static const UnitActiveState state_translation_table[_SOCKET_STATE_MAX] = { |
87f0e418 LP |
35 | [SOCKET_DEAD] = UNIT_INACTIVE, |
36 | [SOCKET_START_PRE] = UNIT_ACTIVATING, | |
37 | [SOCKET_START_POST] = UNIT_ACTIVATING, | |
38 | [SOCKET_LISTENING] = UNIT_ACTIVE, | |
39 | [SOCKET_RUNNING] = UNIT_ACTIVE, | |
40 | [SOCKET_STOP_PRE] = UNIT_DEACTIVATING, | |
41 | [SOCKET_STOP_PRE_SIGTERM] = UNIT_DEACTIVATING, | |
42 | [SOCKET_STOP_PRE_SIGKILL] = UNIT_DEACTIVATING, | |
43 | [SOCKET_STOP_POST] = UNIT_DEACTIVATING, | |
44 | [SOCKET_STOP_POST_SIGTERM] = UNIT_DEACTIVATING, | |
45 | [SOCKET_STOP_POST_SIGKILL] = UNIT_DEACTIVATING, | |
46 | [SOCKET_MAINTAINANCE] = UNIT_INACTIVE, | |
83c60c9f | 47 | }; |
5cb5a6ff | 48 | |
acbb0225 LP |
49 | static const char* const state_string_table[_SOCKET_STATE_MAX] = { |
50 | [SOCKET_DEAD] = "dead", | |
51 | [SOCKET_START_PRE] = "start-pre", | |
52 | [SOCKET_START_POST] = "start-post", | |
53 | [SOCKET_LISTENING] = "listening", | |
54 | [SOCKET_RUNNING] = "running", | |
55 | [SOCKET_STOP_PRE] = "stop-pre", | |
56 | [SOCKET_STOP_PRE_SIGTERM] = "stop-pre-sigterm", | |
57 | [SOCKET_STOP_PRE_SIGKILL] = "stop-pre-sigkill", | |
58 | [SOCKET_STOP_POST] = "stop-post", | |
59 | [SOCKET_STOP_POST_SIGTERM] = "stop-post-sigterm", | |
60 | [SOCKET_STOP_POST_SIGKILL] = "stop-post-sigkill", | |
61 | [SOCKET_MAINTAINANCE] = "maintainance" | |
62 | }; | |
63 | ||
87f0e418 LP |
64 | static void socket_done(Unit *u) { |
65 | Socket *s = SOCKET(u); | |
034c6ed7 LP |
66 | SocketPort *p; |
67 | ||
68 | assert(s); | |
69 | ||
70 | while ((p = s->ports)) { | |
71 | LIST_REMOVE(SocketPort, port, s->ports, p); | |
72 | ||
73 | if (p->fd >= 0) | |
74 | close_nointr(p->fd); | |
75 | free(p->path); | |
76 | free(p); | |
77 | } | |
78 | ||
79 | exec_context_done(&s->exec_context); | |
80 | exec_command_free_array(s->exec_command, _SOCKET_EXEC_MAX); | |
81 | s->control_command = NULL; | |
82 | ||
83 | if (s->control_pid > 0) { | |
87f0e418 | 84 | unit_unwatch_pid(u, s->control_pid); |
034c6ed7 LP |
85 | s->control_pid = 0; |
86 | } | |
87 | ||
88 | s->service = NULL; | |
89 | ||
acbb0225 LP |
90 | free(s->bind_to_device); |
91 | ||
92 | unit_unwatch_timer(u, &s->timer_watch); | |
5cb5a6ff LP |
93 | } |
94 | ||
87f0e418 LP |
95 | static int socket_init(Unit *u) { |
96 | Socket *s = SOCKET(u); | |
44d8db9e LP |
97 | char *t; |
98 | int r; | |
99 | ||
100 | /* First, reset everything to the defaults, in case this is a | |
101 | * reload */ | |
102 | ||
103 | s->state = 0; | |
acbb0225 | 104 | s->timer_watch.type = WATCH_INVALID; |
44d8db9e LP |
105 | s->bind_ipv6_only = false; |
106 | s->backlog = SOMAXCONN; | |
107 | s->timeout_usec = DEFAULT_TIMEOUT_USEC; | |
108 | exec_context_init(&s->exec_context); | |
109 | ||
d46de8a1 LP |
110 | if ((r = unit_load_fragment_and_dropin(u)) <= 0) { |
111 | if (r == 0) | |
112 | r = -ENOENT; | |
44d8db9e | 113 | goto fail; |
d46de8a1 | 114 | } |
44d8db9e | 115 | |
87f0e418 | 116 | if (!(t = unit_name_change_suffix(unit_id(u), ".service"))) { |
44d8db9e LP |
117 | r = -ENOMEM; |
118 | goto fail; | |
119 | } | |
120 | ||
87f0e418 | 121 | r = manager_load_unit(u->meta.manager, t, (Unit**) &s->service); |
44d8db9e LP |
122 | free(t); |
123 | ||
124 | if (r < 0) | |
125 | goto fail; | |
126 | ||
87f0e418 | 127 | if ((r = unit_add_dependency(u, UNIT_BEFORE, UNIT(s->service))) < 0) |
44d8db9e LP |
128 | goto fail; |
129 | ||
130 | return 0; | |
131 | ||
132 | fail: | |
87f0e418 | 133 | socket_done(u); |
44d8db9e LP |
134 | return r; |
135 | } | |
136 | ||
542563ba LP |
137 | static const char* listen_lookup(int type) { |
138 | ||
139 | if (type == SOCK_STREAM) | |
140 | return "ListenStream"; | |
141 | else if (type == SOCK_DGRAM) | |
142 | return "ListenDatagram"; | |
143 | else if (type == SOCK_SEQPACKET) | |
144 | return "ListenSequentialPacket"; | |
145 | ||
034c6ed7 | 146 | assert_not_reached("Unknown socket type"); |
542563ba LP |
147 | return NULL; |
148 | } | |
149 | ||
87f0e418 | 150 | static void socket_dump(Unit *u, FILE *f, const char *prefix) { |
5cb5a6ff | 151 | |
5cb5a6ff LP |
152 | static const char* const command_table[_SOCKET_EXEC_MAX] = { |
153 | [SOCKET_EXEC_START_PRE] = "StartPre", | |
154 | [SOCKET_EXEC_START_POST] = "StartPost", | |
155 | [SOCKET_EXEC_STOP_PRE] = "StopPre", | |
156 | [SOCKET_EXEC_STOP_POST] = "StopPost" | |
157 | }; | |
158 | ||
159 | SocketExecCommand c; | |
87f0e418 | 160 | Socket *s = SOCKET(u); |
542563ba | 161 | SocketPort *p; |
82ba9f08 LP |
162 | const char *prefix2; |
163 | char *p2; | |
5cb5a6ff LP |
164 | |
165 | assert(s); | |
fa068367 | 166 | assert(f); |
5cb5a6ff | 167 | |
82ba9f08 LP |
168 | p2 = strappend(prefix, "\t"); |
169 | prefix2 = p2 ? p2 : prefix; | |
c43d20a0 | 170 | |
5cb5a6ff LP |
171 | fprintf(f, |
172 | "%sSocket State: %s\n" | |
542563ba LP |
173 | "%sBindIPv6Only: %s\n" |
174 | "%sBacklog: %u\n", | |
acbb0225 | 175 | prefix, state_string_table[s->state], |
542563ba LP |
176 | prefix, yes_no(s->bind_ipv6_only), |
177 | prefix, s->backlog); | |
178 | ||
acbb0225 LP |
179 | if (s->bind_to_device) |
180 | fprintf(f, | |
181 | "%sBindToDevice: %s\n", | |
182 | prefix, s->bind_to_device); | |
183 | ||
034c6ed7 | 184 | LIST_FOREACH(port, p, s->ports) { |
5cb5a6ff | 185 | |
542563ba LP |
186 | if (p->type == SOCKET_SOCKET) { |
187 | const char *t; | |
188 | int r; | |
189 | char *k; | |
190 | ||
191 | if ((r = socket_address_print(&p->address, &k)) < 0) | |
192 | t = strerror(-r); | |
193 | else | |
194 | t = k; | |
195 | ||
196 | fprintf(f, "%s%s: %s\n", prefix, listen_lookup(p->address.type), k); | |
197 | free(k); | |
198 | } else | |
199 | fprintf(f, "%sListenFIFO: %s\n", prefix, p->path); | |
200 | } | |
5cb5a6ff LP |
201 | |
202 | exec_context_dump(&s->exec_context, f, prefix); | |
203 | ||
204 | for (c = 0; c < _SOCKET_EXEC_MAX; c++) { | |
c43d20a0 LP |
205 | if (!s->exec_command[c]) |
206 | continue; | |
5cb5a6ff | 207 | |
c43d20a0 LP |
208 | fprintf(f, "%s→ %s:\n", |
209 | prefix, command_table[c]); | |
210 | ||
211 | exec_command_dump_list(s->exec_command[c], f, prefix2); | |
5cb5a6ff | 212 | } |
c43d20a0 | 213 | |
82ba9f08 | 214 | free(p2); |
5cb5a6ff LP |
215 | } |
216 | ||
034c6ed7 | 217 | static void socket_close_fds(Socket *s) { |
83c60c9f LP |
218 | SocketPort *p; |
219 | ||
220 | assert(s); | |
221 | ||
034c6ed7 | 222 | LIST_FOREACH(port, p, s->ports) { |
83c60c9f LP |
223 | if (p->fd < 0) |
224 | continue; | |
225 | ||
acbb0225 | 226 | unit_unwatch_fd(UNIT(s), &p->fd_watch); |
9152c765 LP |
227 | assert_se(close_nointr(p->fd) >= 0); |
228 | ||
83c60c9f LP |
229 | p->fd = -1; |
230 | } | |
231 | } | |
232 | ||
034c6ed7 | 233 | static int socket_open_fds(Socket *s) { |
83c60c9f LP |
234 | SocketPort *p; |
235 | int r; | |
236 | ||
237 | assert(s); | |
238 | ||
034c6ed7 | 239 | LIST_FOREACH(port, p, s->ports) { |
83c60c9f | 240 | |
034c6ed7 LP |
241 | if (p->fd >= 0) |
242 | continue; | |
83c60c9f LP |
243 | |
244 | if (p->type == SOCKET_SOCKET) { | |
245 | ||
acbb0225 | 246 | if ((r = socket_address_listen(&p->address, s->backlog, s->bind_ipv6_only, s->bind_to_device, &p->fd)) < 0) |
83c60c9f LP |
247 | goto rollback; |
248 | ||
249 | } else { | |
250 | struct stat st; | |
251 | assert(p->type == SOCKET_FIFO); | |
252 | ||
253 | if (mkfifo(p->path, 0666 & ~s->exec_context.umask) < 0 && errno != EEXIST) { | |
254 | r = -errno; | |
255 | goto rollback; | |
256 | } | |
257 | ||
258 | if ((p->fd = open(p->path, O_RDWR|O_CLOEXEC|O_NOCTTY|O_NONBLOCK|O_NOFOLLOW)) < 0) { | |
259 | r = -errno; | |
260 | goto rollback; | |
261 | } | |
262 | ||
263 | if (fstat(p->fd, &st) < 0) { | |
264 | r = -errno; | |
265 | goto rollback; | |
266 | } | |
267 | ||
268 | /* FIXME verify user, access mode */ | |
269 | ||
270 | if (!S_ISFIFO(st.st_mode)) { | |
271 | r = -EEXIST; | |
272 | goto rollback; | |
273 | } | |
274 | } | |
034c6ed7 LP |
275 | } |
276 | ||
277 | return 0; | |
278 | ||
279 | rollback: | |
280 | socket_close_fds(s); | |
281 | return r; | |
282 | } | |
283 | ||
284 | static void socket_unwatch_fds(Socket *s) { | |
285 | SocketPort *p; | |
9152c765 | 286 | |
034c6ed7 LP |
287 | assert(s); |
288 | ||
289 | LIST_FOREACH(port, p, s->ports) { | |
290 | if (p->fd < 0) | |
291 | continue; | |
292 | ||
acbb0225 | 293 | unit_unwatch_fd(UNIT(s), &p->fd_watch); |
83c60c9f | 294 | } |
034c6ed7 LP |
295 | } |
296 | ||
297 | static int socket_watch_fds(Socket *s) { | |
298 | SocketPort *p; | |
299 | int r; | |
300 | ||
301 | assert(s); | |
83c60c9f | 302 | |
034c6ed7 LP |
303 | LIST_FOREACH(port, p, s->ports) { |
304 | if (p->fd < 0) | |
305 | continue; | |
306 | ||
f94ea366 | 307 | if ((r = unit_watch_fd(UNIT(s), p->fd, EPOLLIN, &p->fd_watch)) < 0) |
034c6ed7 LP |
308 | goto fail; |
309 | } | |
83c60c9f | 310 | |
542563ba | 311 | return 0; |
83c60c9f | 312 | |
034c6ed7 LP |
313 | fail: |
314 | socket_unwatch_fds(s); | |
315 | return r; | |
316 | } | |
317 | ||
318 | static void socket_set_state(Socket *s, SocketState state) { | |
319 | SocketState old_state; | |
320 | assert(s); | |
321 | ||
322 | old_state = s->state; | |
323 | s->state = state; | |
324 | ||
325 | if (state != SOCKET_START_PRE && | |
326 | state != SOCKET_START_POST && | |
327 | state != SOCKET_STOP_PRE && | |
328 | state != SOCKET_STOP_PRE_SIGTERM && | |
329 | state != SOCKET_STOP_PRE_SIGKILL && | |
330 | state != SOCKET_STOP_POST && | |
331 | state != SOCKET_STOP_POST_SIGTERM && | |
332 | state != SOCKET_STOP_POST_SIGKILL) | |
acbb0225 | 333 | unit_unwatch_timer(UNIT(s), &s->timer_watch); |
034c6ed7 LP |
334 | |
335 | if (state != SOCKET_START_PRE && | |
336 | state != SOCKET_START_POST && | |
337 | state != SOCKET_STOP_PRE && | |
338 | state != SOCKET_STOP_PRE_SIGTERM && | |
339 | state != SOCKET_STOP_PRE_SIGKILL && | |
340 | state != SOCKET_STOP_POST && | |
341 | state != SOCKET_STOP_POST_SIGTERM && | |
342 | state != SOCKET_STOP_POST_SIGKILL) | |
acbb0225 | 343 | if (s->control_pid > 0) { |
87f0e418 | 344 | unit_unwatch_pid(UNIT(s), s->control_pid); |
034c6ed7 LP |
345 | s->control_pid = 0; |
346 | } | |
347 | ||
348 | if (state != SOCKET_START_PRE && | |
349 | state != SOCKET_START_POST && | |
350 | state != SOCKET_STOP_PRE && | |
351 | state != SOCKET_STOP_POST) | |
352 | s->control_command = NULL; | |
353 | ||
354 | if (state != SOCKET_START_POST && | |
355 | state != SOCKET_LISTENING && | |
356 | state != SOCKET_RUNNING && | |
357 | state != SOCKET_STOP_PRE && | |
358 | state != SOCKET_STOP_PRE_SIGTERM && | |
359 | state != SOCKET_STOP_PRE_SIGKILL) | |
360 | socket_close_fds(s); | |
361 | ||
362 | if (state != SOCKET_LISTENING) | |
363 | socket_unwatch_fds(s); | |
364 | ||
d6ea93e3 | 365 | log_debug("%s changed %s → %s", unit_id(UNIT(s)), state_string_table[old_state], state_string_table[state]); |
acbb0225 LP |
366 | |
367 | unit_notify(UNIT(s), state_translation_table[old_state], state_translation_table[state]); | |
034c6ed7 LP |
368 | } |
369 | ||
370 | static int socket_spawn(Socket *s, ExecCommand *c, bool timeout, pid_t *_pid) { | |
371 | pid_t pid; | |
372 | int r; | |
373 | ||
374 | assert(s); | |
375 | assert(c); | |
376 | assert(_pid); | |
377 | ||
378 | if (timeout) { | |
acbb0225 | 379 | if ((r = unit_watch_timer(UNIT(s), s->timeout_usec, &s->timer_watch)) < 0) |
034c6ed7 LP |
380 | goto fail; |
381 | } else | |
acbb0225 | 382 | unit_unwatch_timer(UNIT(s), &s->timer_watch); |
034c6ed7 LP |
383 | |
384 | if ((r = exec_spawn(c, &s->exec_context, NULL, 0, &pid)) < 0) | |
385 | goto fail; | |
386 | ||
87f0e418 | 387 | if ((r = unit_watch_pid(UNIT(s), pid)) < 0) |
034c6ed7 LP |
388 | /* FIXME: we need to do something here */ |
389 | goto fail; | |
83c60c9f | 390 | |
034c6ed7 LP |
391 | *_pid = pid; |
392 | ||
393 | return 0; | |
394 | ||
395 | fail: | |
396 | if (timeout) | |
acbb0225 | 397 | unit_unwatch_timer(UNIT(s), &s->timer_watch); |
83c60c9f LP |
398 | |
399 | return r; | |
542563ba LP |
400 | } |
401 | ||
034c6ed7 LP |
402 | static void socket_enter_dead(Socket *s, bool success) { |
403 | assert(s); | |
404 | ||
405 | if (!success) | |
406 | s->failure = true; | |
407 | ||
408 | socket_set_state(s, s->failure ? SOCKET_MAINTAINANCE : SOCKET_DEAD); | |
409 | } | |
410 | ||
411 | static void socket_enter_stop_post(Socket *s, bool success) { | |
412 | int r; | |
413 | assert(s); | |
414 | ||
415 | if (!success) | |
416 | s->failure = true; | |
417 | ||
d6ea93e3 | 418 | if ((s->control_command = s->exec_command[SOCKET_EXEC_STOP_POST])) |
034c6ed7 LP |
419 | if ((r = socket_spawn(s, s->control_command, true, &s->control_pid)) < 0) |
420 | goto fail; | |
421 | ||
d6ea93e3 LP |
422 | socket_set_state(s, SOCKET_STOP_POST); |
423 | ||
424 | if (!s->control_command) | |
034c6ed7 LP |
425 | socket_enter_dead(s, true); |
426 | ||
427 | return; | |
428 | ||
429 | fail: | |
87f0e418 | 430 | log_warning("%s failed to run stop-post executable: %s", unit_id(UNIT(s)), strerror(-r)); |
034c6ed7 LP |
431 | socket_enter_dead(s, false); |
432 | } | |
433 | ||
434 | static void socket_enter_signal(Socket *s, SocketState state, bool success) { | |
435 | int r; | |
436 | ||
437 | assert(s); | |
438 | ||
439 | if (!success) | |
440 | s->failure = true; | |
441 | ||
442 | if (s->control_pid > 0) { | |
443 | int sig; | |
444 | ||
445 | sig = (state == SOCKET_STOP_PRE_SIGTERM || state == SOCKET_STOP_POST_SIGTERM) ? SIGTERM : SIGKILL; | |
446 | ||
447 | if (kill(s->control_pid, sig) < 0 && errno != ESRCH) { | |
448 | r = -errno; | |
449 | goto fail; | |
450 | } | |
d6ea93e3 | 451 | } |
034c6ed7 | 452 | |
d6ea93e3 LP |
453 | socket_set_state(s, state); |
454 | ||
455 | if (s->control_pid <= 0) | |
034c6ed7 LP |
456 | socket_enter_dead(s, true); |
457 | ||
458 | return; | |
459 | ||
460 | fail: | |
87f0e418 | 461 | log_warning("%s failed to kill processes: %s", unit_id(UNIT(s)), strerror(-r)); |
034c6ed7 LP |
462 | |
463 | if (state == SOCKET_STOP_PRE_SIGTERM || state == SOCKET_STOP_PRE_SIGKILL) | |
464 | socket_enter_stop_post(s, false); | |
465 | else | |
466 | socket_enter_dead(s, false); | |
467 | } | |
468 | ||
469 | static void socket_enter_stop_pre(Socket *s, bool success) { | |
470 | int r; | |
471 | assert(s); | |
472 | ||
473 | if (!success) | |
474 | s->failure = true; | |
475 | ||
d6ea93e3 | 476 | if ((s->control_command = s->exec_command[SOCKET_EXEC_STOP_PRE])) |
034c6ed7 LP |
477 | if ((r = socket_spawn(s, s->control_command, true, &s->control_pid)) < 0) |
478 | goto fail; | |
479 | ||
d6ea93e3 LP |
480 | socket_set_state(s, SOCKET_STOP_PRE); |
481 | ||
482 | if (!s->control_command) | |
034c6ed7 LP |
483 | socket_enter_stop_post(s, true); |
484 | ||
485 | return; | |
486 | ||
487 | fail: | |
87f0e418 | 488 | log_warning("%s failed to run stop-pre executable: %s", unit_id(UNIT(s)), strerror(-r)); |
034c6ed7 LP |
489 | socket_enter_stop_post(s, false); |
490 | } | |
491 | ||
e9af15c3 LP |
492 | static void socket_enter_listening(Socket *s) { |
493 | int r; | |
494 | assert(s); | |
495 | ||
496 | if ((r = socket_watch_fds(s)) < 0) { | |
497 | log_warning("%s failed to watch sockets: %s", unit_id(UNIT(s)), strerror(-r)); | |
498 | goto fail; | |
499 | } | |
500 | ||
501 | socket_set_state(s, SOCKET_LISTENING); | |
502 | return; | |
503 | ||
504 | fail: | |
505 | socket_enter_stop_pre(s, false); | |
506 | } | |
507 | ||
034c6ed7 LP |
508 | static void socket_enter_start_post(Socket *s) { |
509 | int r; | |
510 | assert(s); | |
511 | ||
e9af15c3 | 512 | if ((r = socket_open_fds(s)) < 0) { |
87f0e418 | 513 | log_warning("%s failed to listen on sockets: %s", unit_id(UNIT(s)), strerror(-r)); |
034c6ed7 LP |
514 | goto fail; |
515 | } | |
516 | ||
d6ea93e3 | 517 | if ((s->control_command = s->exec_command[SOCKET_EXEC_START_POST])) |
034c6ed7 | 518 | if ((r = socket_spawn(s, s->control_command, true, &s->control_pid)) < 0) { |
87f0e418 | 519 | log_warning("%s failed to run start-post executable: %s", unit_id(UNIT(s)), strerror(-r)); |
034c6ed7 LP |
520 | goto fail; |
521 | } | |
522 | ||
d6ea93e3 LP |
523 | socket_set_state(s, SOCKET_START_POST); |
524 | ||
525 | if (!s->control_command) | |
e9af15c3 | 526 | socket_enter_listening(s); |
034c6ed7 LP |
527 | |
528 | return; | |
529 | ||
530 | fail: | |
531 | socket_enter_stop_pre(s, false); | |
532 | } | |
533 | ||
534 | static void socket_enter_start_pre(Socket *s) { | |
535 | int r; | |
536 | assert(s); | |
537 | ||
d6ea93e3 | 538 | if ((s->control_command = s->exec_command[SOCKET_EXEC_START_PRE])) |
034c6ed7 LP |
539 | if ((r = socket_spawn(s, s->control_command, true, &s->control_pid)) < 0) |
540 | goto fail; | |
541 | ||
d6ea93e3 LP |
542 | socket_set_state(s, SOCKET_START_PRE); |
543 | ||
544 | if (!s->control_command) | |
034c6ed7 LP |
545 | socket_enter_start_post(s); |
546 | ||
547 | return; | |
548 | ||
549 | fail: | |
87f0e418 | 550 | log_warning("%s failed to run start-pre exectuable: %s", unit_id(UNIT(s)), strerror(-r)); |
034c6ed7 LP |
551 | socket_enter_dead(s, false); |
552 | } | |
553 | ||
554 | static void socket_enter_running(Socket *s) { | |
555 | int r; | |
556 | ||
557 | assert(s); | |
558 | ||
87f0e418 | 559 | if ((r = manager_add_job(UNIT(s)->meta.manager, JOB_START, UNIT(s->service), JOB_REPLACE, true, NULL)) < 0) |
034c6ed7 LP |
560 | goto fail; |
561 | ||
562 | socket_set_state(s, SOCKET_RUNNING); | |
563 | return; | |
564 | ||
565 | fail: | |
87f0e418 | 566 | log_warning("%s failed to queue socket startup job: %s", unit_id(UNIT(s)), strerror(-r)); |
034c6ed7 LP |
567 | socket_enter_dead(s, false); |
568 | } | |
569 | ||
570 | static void socket_run_next(Socket *s, bool success) { | |
571 | int r; | |
572 | ||
573 | assert(s); | |
574 | assert(s->control_command); | |
575 | assert(s->control_command->command_next); | |
576 | ||
577 | if (!success) | |
578 | s->failure = true; | |
579 | ||
580 | s->control_command = s->control_command->command_next; | |
581 | ||
582 | if ((r = socket_spawn(s, s->control_command, true, &s->control_pid)) < 0) | |
583 | goto fail; | |
584 | ||
585 | return; | |
586 | ||
587 | fail: | |
588 | if (s->state == SOCKET_STOP_PRE) | |
589 | socket_enter_stop_post(s, false); | |
590 | else if (s->state == SOCKET_STOP_POST) | |
591 | socket_enter_dead(s, false); | |
592 | else | |
593 | socket_enter_stop_pre(s, false); | |
594 | } | |
595 | ||
87f0e418 LP |
596 | static int socket_start(Unit *u) { |
597 | Socket *s = SOCKET(u); | |
83c60c9f LP |
598 | |
599 | assert(s); | |
600 | ||
034c6ed7 LP |
601 | /* We cannot fulfill this request right now, try again later |
602 | * please! */ | |
603 | if (s->state == SOCKET_STOP_PRE || | |
604 | s->state == SOCKET_STOP_PRE_SIGKILL || | |
605 | s->state == SOCKET_STOP_PRE_SIGTERM || | |
606 | s->state == SOCKET_STOP_POST || | |
607 | s->state == SOCKET_STOP_POST_SIGTERM || | |
608 | s->state == SOCKET_STOP_POST_SIGKILL) | |
609 | return -EAGAIN; | |
610 | ||
83c60c9f LP |
611 | if (s->state == SOCKET_START_PRE || |
612 | s->state == SOCKET_START_POST) | |
034c6ed7 | 613 | return 0; |
83c60c9f | 614 | |
034c6ed7 | 615 | /* Cannot run this without the service being around */ |
87f0e418 | 616 | if (s->service->meta.load_state != UNIT_LOADED) |
034c6ed7 | 617 | return -ENOENT; |
83c60c9f | 618 | |
034c6ed7 | 619 | assert(s->state == SOCKET_DEAD || s->state == SOCKET_MAINTAINANCE); |
83c60c9f | 620 | |
034c6ed7 LP |
621 | s->failure = false; |
622 | socket_enter_start_pre(s); | |
623 | return 0; | |
624 | } | |
83c60c9f | 625 | |
87f0e418 LP |
626 | static int socket_stop(Unit *u) { |
627 | Socket *s = SOCKET(u); | |
034c6ed7 LP |
628 | |
629 | assert(s); | |
630 | ||
631 | /* We cannot fulfill this request right now, try again later | |
632 | * please! */ | |
633 | if (s->state == SOCKET_START_PRE || | |
634 | s->state == SOCKET_START_POST) | |
635 | return -EAGAIN; | |
83c60c9f | 636 | |
034c6ed7 | 637 | assert(s->state == SOCKET_LISTENING || s->state == SOCKET_RUNNING); |
83c60c9f | 638 | |
034c6ed7 | 639 | socket_enter_stop_pre(s, true); |
542563ba LP |
640 | return 0; |
641 | } | |
642 | ||
87f0e418 LP |
643 | static UnitActiveState socket_active_state(Unit *u) { |
644 | assert(u); | |
5cb5a6ff | 645 | |
acbb0225 | 646 | return state_translation_table[SOCKET(u)->state]; |
5cb5a6ff LP |
647 | } |
648 | ||
acbb0225 | 649 | static void socket_fd_event(Unit *u, int fd, uint32_t events, Watch *w) { |
87f0e418 | 650 | Socket *s = SOCKET(u); |
9152c765 | 651 | |
034c6ed7 | 652 | assert(s); |
9152c765 | 653 | |
e9af15c3 | 654 | log_debug("Incoming traffic on %s", unit_id(u)); |
9152c765 | 655 | |
f94ea366 | 656 | if (events != EPOLLIN) |
034c6ed7 | 657 | socket_enter_stop_pre(s, false); |
9152c765 | 658 | |
034c6ed7 | 659 | socket_enter_running(s); |
9152c765 LP |
660 | } |
661 | ||
87f0e418 LP |
662 | static void socket_sigchld_event(Unit *u, pid_t pid, int code, int status) { |
663 | Socket *s = SOCKET(u); | |
034c6ed7 | 664 | bool success; |
5cb5a6ff LP |
665 | |
666 | assert(s); | |
034c6ed7 | 667 | assert(pid >= 0); |
5cb5a6ff | 668 | |
bd982a8b | 669 | success = code == CLD_EXITED && status == 0; |
034c6ed7 | 670 | s->failure = s->failure || !success; |
542563ba | 671 | |
034c6ed7 LP |
672 | assert(s->control_pid == pid); |
673 | assert(s->control_command); | |
674 | ||
675 | exec_status_fill(&s->control_command->exec_status, pid, code, status); | |
676 | s->control_pid = 0; | |
677 | ||
94f04347 | 678 | log_debug("%s control process exited, code=%s status=%i", unit_id(u), sigchld_code_to_string(code), status); |
034c6ed7 LP |
679 | |
680 | if (s->control_command->command_next && | |
acbb0225 LP |
681 | (success || (s->state == SOCKET_EXEC_STOP_PRE || s->state == SOCKET_EXEC_STOP_POST))) { |
682 | log_debug("%s running next command for the state %s", unit_id(u), state_string_table[s->state]); | |
034c6ed7 | 683 | socket_run_next(s, success); |
acbb0225 | 684 | } else { |
034c6ed7 LP |
685 | /* No further commands for this step, so let's figure |
686 | * out what to do next */ | |
5cb5a6ff | 687 | |
bd982a8b | 688 | log_debug("%s got final SIGCHLD for state %s", unit_id(u), state_string_table[s->state]); |
acbb0225 | 689 | |
034c6ed7 LP |
690 | switch (s->state) { |
691 | ||
692 | case SOCKET_START_PRE: | |
693 | if (success) | |
acbb0225 | 694 | socket_enter_start_post(s); |
034c6ed7 LP |
695 | else |
696 | socket_enter_stop_pre(s, false); | |
697 | break; | |
698 | ||
699 | case SOCKET_START_POST: | |
700 | if (success) | |
e9af15c3 | 701 | socket_enter_listening(s); |
034c6ed7 LP |
702 | else |
703 | socket_enter_stop_pre(s, false); | |
704 | break; | |
705 | ||
706 | case SOCKET_STOP_PRE: | |
707 | case SOCKET_STOP_PRE_SIGTERM: | |
708 | case SOCKET_STOP_PRE_SIGKILL: | |
709 | socket_enter_stop_post(s, success); | |
710 | break; | |
711 | ||
712 | case SOCKET_STOP_POST: | |
713 | case SOCKET_STOP_POST_SIGTERM: | |
714 | case SOCKET_STOP_POST_SIGKILL: | |
715 | socket_enter_dead(s, success); | |
716 | break; | |
717 | ||
718 | default: | |
719 | assert_not_reached("Uh, control process died at wrong time."); | |
720 | } | |
721 | } | |
722 | } | |
5cb5a6ff | 723 | |
acbb0225 | 724 | static void socket_timer_event(Unit *u, uint64_t elapsed, Watch *w) { |
87f0e418 | 725 | Socket *s = SOCKET(u); |
5cb5a6ff | 726 | |
034c6ed7 LP |
727 | assert(s); |
728 | assert(elapsed == 1); | |
729 | ||
acbb0225 | 730 | assert(w == &s->timer_watch); |
034c6ed7 LP |
731 | |
732 | switch (s->state) { | |
733 | ||
734 | case SOCKET_START_PRE: | |
735 | case SOCKET_START_POST: | |
87f0e418 | 736 | log_warning("%s operation timed out. Stopping.", unit_id(u)); |
034c6ed7 LP |
737 | socket_enter_stop_pre(s, false); |
738 | break; | |
739 | ||
740 | case SOCKET_STOP_PRE: | |
87f0e418 | 741 | log_warning("%s stopping timed out. Terminating.", unit_id(u)); |
034c6ed7 LP |
742 | socket_enter_signal(s, SOCKET_STOP_PRE_SIGTERM, false); |
743 | break; | |
744 | ||
745 | case SOCKET_STOP_PRE_SIGTERM: | |
87f0e418 | 746 | log_warning("%s stopping timed out. Killing.", unit_id(u)); |
034c6ed7 LP |
747 | socket_enter_signal(s, SOCKET_STOP_PRE_SIGKILL, false); |
748 | break; | |
749 | ||
750 | case SOCKET_STOP_PRE_SIGKILL: | |
87f0e418 | 751 | log_warning("%s still around after SIGKILL. Ignoring.", unit_id(u)); |
034c6ed7 LP |
752 | socket_enter_stop_post(s, false); |
753 | break; | |
754 | ||
755 | case SOCKET_STOP_POST: | |
87f0e418 | 756 | log_warning("%s stopping timed out (2). Terminating.", unit_id(u)); |
034c6ed7 LP |
757 | socket_enter_signal(s, SOCKET_STOP_POST_SIGTERM, false); |
758 | break; | |
759 | ||
760 | case SOCKET_STOP_POST_SIGTERM: | |
87f0e418 | 761 | log_warning("%s stopping timed out (2). Killing.", unit_id(u)); |
034c6ed7 LP |
762 | socket_enter_signal(s, SOCKET_STOP_POST_SIGKILL, false); |
763 | break; | |
764 | ||
765 | case SOCKET_STOP_POST_SIGKILL: | |
87f0e418 | 766 | log_warning("%s still around after SIGKILL (2). Entering maintainance mode.", unit_id(u)); |
034c6ed7 LP |
767 | socket_enter_dead(s, false); |
768 | break; | |
769 | ||
770 | default: | |
771 | assert_not_reached("Timeout at wrong time."); | |
772 | } | |
5cb5a6ff LP |
773 | } |
774 | ||
44d8db9e LP |
775 | int socket_collect_fds(Socket *s, int **fds, unsigned *n_fds) { |
776 | int *rfds; | |
777 | unsigned rn_fds, k; | |
778 | SocketPort *p; | |
779 | ||
780 | assert(s); | |
781 | assert(fds); | |
782 | assert(n_fds); | |
783 | ||
784 | /* Called from the service code for requesting our fds */ | |
785 | ||
786 | rn_fds = 0; | |
787 | LIST_FOREACH(port, p, s->ports) | |
788 | if (p->fd >= 0) | |
789 | rn_fds++; | |
790 | ||
791 | if (!(rfds = new(int, rn_fds)) < 0) | |
792 | return -ENOMEM; | |
793 | ||
794 | k = 0; | |
795 | LIST_FOREACH(port, p, s->ports) | |
796 | if (p->fd >= 0) | |
797 | rfds[k++] = p->fd; | |
798 | ||
799 | assert(k == rn_fds); | |
800 | ||
801 | *fds = rfds; | |
802 | *n_fds = rn_fds; | |
803 | ||
804 | return 0; | |
805 | } | |
806 | ||
ceee3d82 LP |
807 | void socket_notify_service_dead(Socket *s) { |
808 | assert(s); | |
809 | ||
810 | /* The service is dead. Dang. */ | |
811 | ||
812 | if (s->state == SOCKET_RUNNING) { | |
813 | log_debug("%s got notified about service death.", unit_id(UNIT(s))); | |
814 | socket_enter_listening(s); | |
815 | } | |
816 | } | |
817 | ||
87f0e418 | 818 | const UnitVTable socket_vtable = { |
5cb5a6ff LP |
819 | .suffix = ".socket", |
820 | ||
034c6ed7 LP |
821 | .init = socket_init, |
822 | .done = socket_done, | |
823 | ||
5cb5a6ff LP |
824 | .dump = socket_dump, |
825 | ||
542563ba LP |
826 | .start = socket_start, |
827 | .stop = socket_stop, | |
5cb5a6ff LP |
828 | |
829 | .active_state = socket_active_state, | |
830 | ||
9152c765 | 831 | .fd_event = socket_fd_event, |
034c6ed7 LP |
832 | .sigchld_event = socket_sigchld_event, |
833 | .timer_event = socket_timer_event | |
5cb5a6ff | 834 | }; |