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663996b3 MS |
1 | /*** |
2 | This file is part of systemd. | |
3 | ||
4 | Copyright 2010 Lennart Poettering | |
5 | ||
6 | systemd is free software; you can redistribute it and/or modify it | |
7 | under the terms of the GNU Lesser General Public License as published by | |
8 | the Free Software Foundation; either version 2.1 of the License, or | |
9 | (at your option) any later version. | |
10 | ||
11 | systemd is distributed in the hope that it will be useful, but | |
12 | WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
14 | Lesser General Public License for more details. | |
15 | ||
16 | You should have received a copy of the GNU Lesser General Public License | |
17 | along with systemd; If not, see <http://www.gnu.org/licenses/>. | |
18 | ***/ | |
19 | ||
6300502b | 20 | #include <arpa/inet.h> |
663996b3 MS |
21 | #include <errno.h> |
22 | #include <fcntl.h> | |
663996b3 | 23 | #include <mqueue.h> |
6300502b MP |
24 | #include <netinet/tcp.h> |
25 | #include <signal.h> | |
26 | #include <sys/epoll.h> | |
27 | #include <sys/stat.h> | |
28 | #include <unistd.h> | |
4c89c718 | 29 | #include <linux/sctp.h> |
663996b3 | 30 | |
db2df898 | 31 | #include "alloc-util.h" |
6300502b MP |
32 | #include "bus-error.h" |
33 | #include "bus-util.h" | |
34 | #include "copy.h" | |
35 | #include "dbus-socket.h" | |
36 | #include "def.h" | |
37 | #include "exit-status.h" | |
db2df898 | 38 | #include "fd-util.h" |
6300502b | 39 | #include "formats-util.h" |
aa27b158 | 40 | #include "io-util.h" |
6300502b | 41 | #include "label.h" |
663996b3 | 42 | #include "log.h" |
6300502b | 43 | #include "missing.h" |
663996b3 | 44 | #include "mkdir.h" |
db2df898 | 45 | #include "parse-util.h" |
663996b3 | 46 | #include "path-util.h" |
db2df898 | 47 | #include "process-util.h" |
e735f4d4 | 48 | #include "selinux-util.h" |
86f210e9 | 49 | #include "signal-util.h" |
6300502b | 50 | #include "smack-util.h" |
86f210e9 | 51 | #include "socket.h" |
6300502b | 52 | #include "special.h" |
db2df898 MP |
53 | #include "string-table.h" |
54 | #include "string-util.h" | |
6300502b MP |
55 | #include "strv.h" |
56 | #include "unit-name.h" | |
57 | #include "unit-printf.h" | |
58 | #include "unit.h" | |
db2df898 | 59 | #include "user-util.h" |
663996b3 MS |
60 | |
61 | static const UnitActiveState state_translation_table[_SOCKET_STATE_MAX] = { | |
62 | [SOCKET_DEAD] = UNIT_INACTIVE, | |
63 | [SOCKET_START_PRE] = UNIT_ACTIVATING, | |
60f067b4 | 64 | [SOCKET_START_CHOWN] = UNIT_ACTIVATING, |
663996b3 MS |
65 | [SOCKET_START_POST] = UNIT_ACTIVATING, |
66 | [SOCKET_LISTENING] = UNIT_ACTIVE, | |
67 | [SOCKET_RUNNING] = UNIT_ACTIVE, | |
68 | [SOCKET_STOP_PRE] = UNIT_DEACTIVATING, | |
69 | [SOCKET_STOP_PRE_SIGTERM] = UNIT_DEACTIVATING, | |
70 | [SOCKET_STOP_PRE_SIGKILL] = UNIT_DEACTIVATING, | |
71 | [SOCKET_STOP_POST] = UNIT_DEACTIVATING, | |
72 | [SOCKET_FINAL_SIGTERM] = UNIT_DEACTIVATING, | |
73 | [SOCKET_FINAL_SIGKILL] = UNIT_DEACTIVATING, | |
74 | [SOCKET_FAILED] = UNIT_FAILED | |
75 | }; | |
76 | ||
60f067b4 JS |
77 | static int socket_dispatch_io(sd_event_source *source, int fd, uint32_t revents, void *userdata); |
78 | static int socket_dispatch_timer(sd_event_source *source, usec_t usec, void *userdata); | |
79 | ||
663996b3 MS |
80 | static void socket_init(Unit *u) { |
81 | Socket *s = SOCKET(u); | |
82 | ||
83 | assert(u); | |
84 | assert(u->load_state == UNIT_STUB); | |
85 | ||
86 | s->backlog = SOMAXCONN; | |
60f067b4 | 87 | s->timeout_usec = u->manager->default_timeout_start_usec; |
663996b3 MS |
88 | s->directory_mode = 0755; |
89 | s->socket_mode = 0666; | |
90 | ||
91 | s->max_connections = 64; | |
92 | ||
93 | s->priority = -1; | |
94 | s->ip_tos = -1; | |
95 | s->ip_ttl = -1; | |
96 | s->mark = -1; | |
97 | ||
663996b3 MS |
98 | s->exec_context.std_output = u->manager->default_std_output; |
99 | s->exec_context.std_error = u->manager->default_std_error; | |
663996b3 MS |
100 | |
101 | s->control_command_id = _SOCKET_EXEC_COMMAND_INVALID; | |
aa27b158 MP |
102 | |
103 | s->trigger_limit.interval = USEC_INFINITY; | |
104 | s->trigger_limit.burst = (unsigned) -1; | |
663996b3 MS |
105 | } |
106 | ||
107 | static void socket_unwatch_control_pid(Socket *s) { | |
108 | assert(s); | |
109 | ||
110 | if (s->control_pid <= 0) | |
111 | return; | |
112 | ||
113 | unit_unwatch_pid(UNIT(s), s->control_pid); | |
114 | s->control_pid = 0; | |
115 | } | |
116 | ||
6300502b | 117 | static void socket_cleanup_fd_list(SocketPort *p) { |
db2df898 | 118 | assert(p); |
6300502b | 119 | |
db2df898 | 120 | close_many(p->auxiliary_fds, p->n_auxiliary_fds); |
6300502b MP |
121 | p->auxiliary_fds = mfree(p->auxiliary_fds); |
122 | p->n_auxiliary_fds = 0; | |
123 | } | |
124 | ||
663996b3 MS |
125 | void socket_free_ports(Socket *s) { |
126 | SocketPort *p; | |
127 | ||
128 | assert(s); | |
129 | ||
130 | while ((p = s->ports)) { | |
60f067b4 | 131 | LIST_REMOVE(port, s->ports, p); |
663996b3 | 132 | |
60f067b4 | 133 | sd_event_source_unref(p->event_source); |
663996b3 | 134 | |
6300502b | 135 | socket_cleanup_fd_list(p); |
60f067b4 | 136 | safe_close(p->fd); |
663996b3 MS |
137 | free(p->path); |
138 | free(p); | |
139 | } | |
140 | } | |
141 | ||
142 | static void socket_done(Unit *u) { | |
143 | Socket *s = SOCKET(u); | |
144 | ||
145 | assert(s); | |
146 | ||
147 | socket_free_ports(s); | |
148 | ||
60f067b4 | 149 | s->exec_runtime = exec_runtime_unref(s->exec_runtime); |
663996b3 MS |
150 | exec_command_free_array(s->exec_command, _SOCKET_EXEC_COMMAND_MAX); |
151 | s->control_command = NULL; | |
152 | ||
153 | socket_unwatch_control_pid(s); | |
154 | ||
155 | unit_ref_unset(&s->service); | |
156 | ||
6300502b MP |
157 | s->tcp_congestion = mfree(s->tcp_congestion); |
158 | s->bind_to_device = mfree(s->bind_to_device); | |
663996b3 | 159 | |
4c89c718 MP |
160 | s->smack = mfree(s->smack); |
161 | s->smack_ip_in = mfree(s->smack_ip_in); | |
162 | s->smack_ip_out = mfree(s->smack_ip_out); | |
663996b3 | 163 | |
60f067b4 JS |
164 | strv_free(s->symlinks); |
165 | ||
4c89c718 MP |
166 | s->user = mfree(s->user); |
167 | s->group = mfree(s->group); | |
168 | ||
169 | s->fdname = mfree(s->fdname); | |
60f067b4 JS |
170 | |
171 | s->timer_event_source = sd_event_source_unref(s->timer_event_source); | |
172 | } | |
173 | ||
4c89c718 | 174 | static int socket_arm_timer(Socket *s, usec_t usec) { |
60f067b4 JS |
175 | int r; |
176 | ||
177 | assert(s); | |
178 | ||
60f067b4 | 179 | if (s->timer_event_source) { |
4c89c718 | 180 | r = sd_event_source_set_time(s->timer_event_source, usec); |
60f067b4 JS |
181 | if (r < 0) |
182 | return r; | |
183 | ||
184 | return sd_event_source_set_enabled(s->timer_event_source, SD_EVENT_ONESHOT); | |
185 | } | |
186 | ||
4c89c718 MP |
187 | if (usec == USEC_INFINITY) |
188 | return 0; | |
189 | ||
e3bff60a | 190 | r = sd_event_add_time( |
60f067b4 JS |
191 | UNIT(s)->manager->event, |
192 | &s->timer_event_source, | |
193 | CLOCK_MONOTONIC, | |
4c89c718 | 194 | usec, 0, |
60f067b4 | 195 | socket_dispatch_timer, s); |
e3bff60a MP |
196 | if (r < 0) |
197 | return r; | |
198 | ||
199 | (void) sd_event_source_set_description(s->timer_event_source, "socket-timer"); | |
200 | ||
201 | return 0; | |
663996b3 MS |
202 | } |
203 | ||
5eef597e MP |
204 | int socket_instantiate_service(Socket *s) { |
205 | _cleanup_free_ char *prefix = NULL, *name = NULL; | |
663996b3 MS |
206 | int r; |
207 | Unit *u; | |
208 | ||
209 | assert(s); | |
210 | ||
211 | /* This fills in s->service if it isn't filled in yet. For | |
212 | * Accept=yes sockets we create the next connection service | |
213 | * here. For Accept=no this is mostly a NOP since the service | |
214 | * is figured out at load time anyway. */ | |
215 | ||
e3bff60a | 216 | if (UNIT_DEREF(s->service)) |
663996b3 MS |
217 | return 0; |
218 | ||
e3bff60a MP |
219 | if (!s->accept) |
220 | return 0; | |
221 | ||
222 | r = unit_name_to_prefix(UNIT(s)->id, &prefix); | |
223 | if (r < 0) | |
224 | return r; | |
663996b3 | 225 | |
60f067b4 | 226 | if (asprintf(&name, "%s@%u.service", prefix, s->n_accepted) < 0) |
663996b3 MS |
227 | return -ENOMEM; |
228 | ||
229 | r = manager_load_unit(UNIT(s)->manager, name, NULL, NULL, &u); | |
663996b3 MS |
230 | if (r < 0) |
231 | return r; | |
232 | ||
663996b3 MS |
233 | unit_ref_set(&s->service, u); |
234 | ||
235 | return unit_add_two_dependencies(UNIT(s), UNIT_BEFORE, UNIT_TRIGGERS, u, false); | |
236 | } | |
237 | ||
238 | static bool have_non_accept_socket(Socket *s) { | |
239 | SocketPort *p; | |
240 | ||
241 | assert(s); | |
242 | ||
243 | if (!s->accept) | |
244 | return true; | |
245 | ||
246 | LIST_FOREACH(port, p, s->ports) { | |
247 | ||
248 | if (p->type != SOCKET_SOCKET) | |
249 | return true; | |
250 | ||
251 | if (!socket_address_can_accept(&p->address)) | |
252 | return true; | |
253 | } | |
254 | ||
255 | return false; | |
256 | } | |
257 | ||
14228c0d | 258 | static int socket_add_mount_links(Socket *s) { |
663996b3 | 259 | SocketPort *p; |
663996b3 MS |
260 | int r; |
261 | ||
262 | assert(s); | |
663996b3 | 263 | |
14228c0d MB |
264 | LIST_FOREACH(port, p, s->ports) { |
265 | const char *path = NULL; | |
663996b3 | 266 | |
14228c0d MB |
267 | if (p->type == SOCKET_SOCKET) |
268 | path = socket_address_get_path(&p->address); | |
6300502b | 269 | else if (IN_SET(p->type, SOCKET_FIFO, SOCKET_SPECIAL, SOCKET_USB_FUNCTION)) |
14228c0d | 270 | path = p->path; |
663996b3 | 271 | |
14228c0d MB |
272 | if (!path) |
273 | continue; | |
663996b3 | 274 | |
14228c0d | 275 | r = unit_require_mounts_for(UNIT(s), path); |
663996b3 MS |
276 | if (r < 0) |
277 | return r; | |
278 | } | |
279 | ||
280 | return 0; | |
281 | } | |
282 | ||
283 | static int socket_add_device_link(Socket *s) { | |
284 | char *t; | |
663996b3 MS |
285 | |
286 | assert(s); | |
287 | ||
288 | if (!s->bind_to_device || streq(s->bind_to_device, "lo")) | |
289 | return 0; | |
290 | ||
e735f4d4 | 291 | t = strjoina("/sys/subsystem/net/devices/", s->bind_to_device); |
4c89c718 | 292 | return unit_add_node_link(UNIT(s), t, false, UNIT_BINDS_TO); |
663996b3 MS |
293 | } |
294 | ||
295 | static int socket_add_default_dependencies(Socket *s) { | |
296 | int r; | |
297 | assert(s); | |
298 | ||
db2df898 MP |
299 | if (!UNIT(s)->default_dependencies) |
300 | return 0; | |
301 | ||
663996b3 MS |
302 | r = unit_add_dependency_by_name(UNIT(s), UNIT_BEFORE, SPECIAL_SOCKETS_TARGET, NULL, true); |
303 | if (r < 0) | |
304 | return r; | |
305 | ||
aa27b158 | 306 | if (MANAGER_IS_SYSTEM(UNIT(s)->manager)) { |
663996b3 MS |
307 | r = unit_add_two_dependencies_by_name(UNIT(s), UNIT_AFTER, UNIT_REQUIRES, SPECIAL_SYSINIT_TARGET, NULL, true); |
308 | if (r < 0) | |
309 | return r; | |
310 | } | |
311 | ||
312 | return unit_add_two_dependencies_by_name(UNIT(s), UNIT_BEFORE, UNIT_CONFLICTS, SPECIAL_SHUTDOWN_TARGET, NULL, true); | |
313 | } | |
314 | ||
315 | _pure_ static bool socket_has_exec(Socket *s) { | |
316 | unsigned i; | |
317 | assert(s); | |
318 | ||
319 | for (i = 0; i < _SOCKET_EXEC_COMMAND_MAX; i++) | |
320 | if (s->exec_command[i]) | |
321 | return true; | |
322 | ||
323 | return false; | |
324 | } | |
325 | ||
60f067b4 JS |
326 | static int socket_add_extras(Socket *s) { |
327 | Unit *u = UNIT(s); | |
663996b3 MS |
328 | int r; |
329 | ||
60f067b4 | 330 | assert(s); |
663996b3 | 331 | |
aa27b158 MP |
332 | /* Pick defaults for the trigger limit, if nothing was explicitly configured. We pick a relatively high limit |
333 | * in Accept=yes mode, and a lower limit for Accept=no. Reason: in Accept=yes mode we are invoking accept() | |
334 | * ourselves before the trigger limit can hit, thus incoming connections are taken off the socket queue quickly | |
335 | * and reliably. This is different for Accept=no, where the spawned service has to take the incoming traffic | |
336 | * off the queues, which it might not necessarily do. Moreover, while Accept=no services are supposed to | |
337 | * process whatever is queued in one go, and thus should normally never have to be started frequently. This is | |
338 | * different for Accept=yes where each connection is processed by a new service instance, and thus frequent | |
339 | * service starts are typical. */ | |
340 | ||
341 | if (s->trigger_limit.interval == USEC_INFINITY) | |
342 | s->trigger_limit.interval = 2 * USEC_PER_SEC; | |
343 | ||
344 | if (s->trigger_limit.burst == (unsigned) -1) { | |
345 | if (s->accept) | |
346 | s->trigger_limit.burst = 200; | |
347 | else | |
348 | s->trigger_limit.burst = 20; | |
349 | } | |
350 | ||
60f067b4 | 351 | if (have_non_accept_socket(s)) { |
663996b3 | 352 | |
60f067b4 JS |
353 | if (!UNIT_DEREF(s->service)) { |
354 | Unit *x; | |
663996b3 | 355 | |
60f067b4 | 356 | r = unit_load_related_unit(u, ".service", &x); |
663996b3 MS |
357 | if (r < 0) |
358 | return r; | |
60f067b4 JS |
359 | |
360 | unit_ref_set(&s->service, x); | |
663996b3 MS |
361 | } |
362 | ||
60f067b4 JS |
363 | r = unit_add_two_dependencies(u, UNIT_BEFORE, UNIT_TRIGGERS, UNIT_DEREF(s->service), true); |
364 | if (r < 0) | |
663996b3 | 365 | return r; |
60f067b4 | 366 | } |
663996b3 | 367 | |
60f067b4 JS |
368 | r = socket_add_mount_links(s); |
369 | if (r < 0) | |
370 | return r; | |
371 | ||
372 | r = socket_add_device_link(s); | |
373 | if (r < 0) | |
374 | return r; | |
375 | ||
376 | r = unit_patch_contexts(u); | |
377 | if (r < 0) | |
378 | return r; | |
379 | ||
380 | if (socket_has_exec(s)) { | |
381 | r = unit_add_exec_dependencies(u, &s->exec_context); | |
382 | if (r < 0) | |
663996b3 MS |
383 | return r; |
384 | ||
d9dfd233 | 385 | r = unit_set_default_slice(u); |
60f067b4 JS |
386 | if (r < 0) |
387 | return r; | |
388 | } | |
663996b3 | 389 | |
db2df898 MP |
390 | r = socket_add_default_dependencies(s); |
391 | if (r < 0) | |
392 | return r; | |
663996b3 | 393 | |
60f067b4 JS |
394 | return 0; |
395 | } | |
396 | ||
397 | static const char *socket_find_symlink_target(Socket *s) { | |
398 | const char *found = NULL; | |
399 | SocketPort *p; | |
400 | ||
401 | LIST_FOREACH(port, p, s->ports) { | |
402 | const char *f = NULL; | |
403 | ||
404 | switch (p->type) { | |
663996b3 | 405 | |
60f067b4 JS |
406 | case SOCKET_FIFO: |
407 | f = p->path; | |
408 | break; | |
409 | ||
410 | case SOCKET_SOCKET: | |
411 | if (p->address.sockaddr.un.sun_path[0] != 0) | |
412 | f = p->address.sockaddr.un.sun_path; | |
413 | break; | |
414 | ||
415 | default: | |
416 | break; | |
417 | } | |
418 | ||
419 | if (f) { | |
420 | if (found) | |
421 | return NULL; | |
422 | ||
423 | found = f; | |
424 | } | |
425 | } | |
426 | ||
427 | return found; | |
428 | } | |
429 | ||
430 | static int socket_verify(Socket *s) { | |
431 | assert(s); | |
432 | ||
433 | if (UNIT(s)->load_state != UNIT_LOADED) | |
434 | return 0; | |
435 | ||
436 | if (!s->ports) { | |
e3bff60a | 437 | log_unit_error(UNIT(s), "Unit lacks Listen setting. Refusing."); |
60f067b4 JS |
438 | return -EINVAL; |
439 | } | |
440 | ||
441 | if (s->accept && have_non_accept_socket(s)) { | |
e3bff60a | 442 | log_unit_error(UNIT(s), "Unit configured for accepting sockets, but sockets are non-accepting. Refusing."); |
60f067b4 JS |
443 | return -EINVAL; |
444 | } | |
445 | ||
446 | if (s->accept && s->max_connections <= 0) { | |
e3bff60a | 447 | log_unit_error(UNIT(s), "MaxConnection= setting too small. Refusing."); |
60f067b4 JS |
448 | return -EINVAL; |
449 | } | |
450 | ||
451 | if (s->accept && UNIT_DEREF(s->service)) { | |
e3bff60a | 452 | log_unit_error(UNIT(s), "Explicit service configuration for accepting socket units not supported. Refusing."); |
60f067b4 JS |
453 | return -EINVAL; |
454 | } | |
455 | ||
456 | if (s->exec_context.pam_name && s->kill_context.kill_mode != KILL_CONTROL_GROUP) { | |
e3bff60a | 457 | log_unit_error(UNIT(s), "Unit has PAM enabled. Kill mode must be set to 'control-group'. Refusing."); |
60f067b4 JS |
458 | return -EINVAL; |
459 | } | |
460 | ||
461 | if (!strv_isempty(s->symlinks) && !socket_find_symlink_target(s)) { | |
e3bff60a | 462 | log_unit_error(UNIT(s), "Unit has symlinks set but none or more than one node in the file system. Refusing."); |
60f067b4 JS |
463 | return -EINVAL; |
464 | } | |
465 | ||
466 | return 0; | |
467 | } | |
468 | ||
469 | static int socket_load(Unit *u) { | |
470 | Socket *s = SOCKET(u); | |
471 | int r; | |
472 | ||
473 | assert(u); | |
474 | assert(u->load_state == UNIT_STUB); | |
475 | ||
476 | r = unit_load_fragment_and_dropin(u); | |
477 | if (r < 0) | |
478 | return r; | |
479 | ||
480 | if (u->load_state == UNIT_LOADED) { | |
481 | /* This is a new unit? Then let's add in some extras */ | |
482 | r = socket_add_extras(s); | |
663996b3 MS |
483 | if (r < 0) |
484 | return r; | |
485 | } | |
486 | ||
487 | return socket_verify(s); | |
488 | } | |
489 | ||
490 | _const_ static const char* listen_lookup(int family, int type) { | |
491 | ||
492 | if (family == AF_NETLINK) | |
493 | return "ListenNetlink"; | |
494 | ||
495 | if (type == SOCK_STREAM) | |
496 | return "ListenStream"; | |
497 | else if (type == SOCK_DGRAM) | |
498 | return "ListenDatagram"; | |
499 | else if (type == SOCK_SEQPACKET) | |
500 | return "ListenSequentialPacket"; | |
501 | ||
502 | assert_not_reached("Unknown socket type"); | |
503 | return NULL; | |
504 | } | |
505 | ||
506 | static void socket_dump(Unit *u, FILE *f, const char *prefix) { | |
5eef597e | 507 | char time_string[FORMAT_TIMESPAN_MAX]; |
663996b3 MS |
508 | SocketExecCommand c; |
509 | Socket *s = SOCKET(u); | |
510 | SocketPort *p; | |
511 | const char *prefix2; | |
663996b3 MS |
512 | |
513 | assert(s); | |
514 | assert(f); | |
515 | ||
5eef597e | 516 | prefix = strempty(prefix); |
e735f4d4 | 517 | prefix2 = strjoina(prefix, "\t"); |
663996b3 MS |
518 | |
519 | fprintf(f, | |
520 | "%sSocket State: %s\n" | |
521 | "%sResult: %s\n" | |
522 | "%sBindIPv6Only: %s\n" | |
523 | "%sBacklog: %u\n" | |
524 | "%sSocketMode: %04o\n" | |
525 | "%sDirectoryMode: %04o\n" | |
526 | "%sKeepAlive: %s\n" | |
5eef597e | 527 | "%sNoDelay: %s\n" |
663996b3 MS |
528 | "%sFreeBind: %s\n" |
529 | "%sTransparent: %s\n" | |
530 | "%sBroadcast: %s\n" | |
531 | "%sPassCredentials: %s\n" | |
532 | "%sPassSecurity: %s\n" | |
60f067b4 | 533 | "%sTCPCongestion: %s\n" |
5eef597e | 534 | "%sRemoveOnStop: %s\n" |
6300502b MP |
535 | "%sWritable: %s\n" |
536 | "%sFDName: %s\n" | |
5eef597e | 537 | "%sSELinuxContextFromNet: %s\n", |
663996b3 MS |
538 | prefix, socket_state_to_string(s->state), |
539 | prefix, socket_result_to_string(s->result), | |
540 | prefix, socket_address_bind_ipv6_only_to_string(s->bind_ipv6_only), | |
541 | prefix, s->backlog, | |
542 | prefix, s->socket_mode, | |
543 | prefix, s->directory_mode, | |
544 | prefix, yes_no(s->keep_alive), | |
5eef597e | 545 | prefix, yes_no(s->no_delay), |
663996b3 MS |
546 | prefix, yes_no(s->free_bind), |
547 | prefix, yes_no(s->transparent), | |
548 | prefix, yes_no(s->broadcast), | |
549 | prefix, yes_no(s->pass_cred), | |
550 | prefix, yes_no(s->pass_sec), | |
60f067b4 | 551 | prefix, strna(s->tcp_congestion), |
5eef597e | 552 | prefix, yes_no(s->remove_on_stop), |
6300502b MP |
553 | prefix, yes_no(s->writable), |
554 | prefix, socket_fdname(s), | |
5eef597e | 555 | prefix, yes_no(s->selinux_context_from_net)); |
663996b3 MS |
556 | |
557 | if (s->control_pid > 0) | |
558 | fprintf(f, | |
60f067b4 JS |
559 | "%sControl PID: "PID_FMT"\n", |
560 | prefix, s->control_pid); | |
663996b3 MS |
561 | |
562 | if (s->bind_to_device) | |
563 | fprintf(f, | |
564 | "%sBindToDevice: %s\n", | |
565 | prefix, s->bind_to_device); | |
566 | ||
567 | if (s->accept) | |
568 | fprintf(f, | |
569 | "%sAccepted: %u\n" | |
570 | "%sNConnections: %u\n" | |
571 | "%sMaxConnections: %u\n", | |
572 | prefix, s->n_accepted, | |
573 | prefix, s->n_connections, | |
574 | prefix, s->max_connections); | |
575 | ||
576 | if (s->priority >= 0) | |
577 | fprintf(f, | |
578 | "%sPriority: %i\n", | |
579 | prefix, s->priority); | |
580 | ||
581 | if (s->receive_buffer > 0) | |
582 | fprintf(f, | |
583 | "%sReceiveBuffer: %zu\n", | |
584 | prefix, s->receive_buffer); | |
585 | ||
586 | if (s->send_buffer > 0) | |
587 | fprintf(f, | |
588 | "%sSendBuffer: %zu\n", | |
589 | prefix, s->send_buffer); | |
590 | ||
591 | if (s->ip_tos >= 0) | |
592 | fprintf(f, | |
593 | "%sIPTOS: %i\n", | |
594 | prefix, s->ip_tos); | |
595 | ||
596 | if (s->ip_ttl >= 0) | |
597 | fprintf(f, | |
598 | "%sIPTTL: %i\n", | |
599 | prefix, s->ip_ttl); | |
600 | ||
601 | if (s->pipe_size > 0) | |
602 | fprintf(f, | |
603 | "%sPipeSize: %zu\n", | |
604 | prefix, s->pipe_size); | |
605 | ||
606 | if (s->mark >= 0) | |
607 | fprintf(f, | |
608 | "%sMark: %i\n", | |
609 | prefix, s->mark); | |
610 | ||
611 | if (s->mq_maxmsg > 0) | |
612 | fprintf(f, | |
613 | "%sMessageQueueMaxMessages: %li\n", | |
614 | prefix, s->mq_maxmsg); | |
615 | ||
616 | if (s->mq_msgsize > 0) | |
617 | fprintf(f, | |
618 | "%sMessageQueueMessageSize: %li\n", | |
619 | prefix, s->mq_msgsize); | |
620 | ||
60f067b4 | 621 | if (s->reuse_port) |
14228c0d MB |
622 | fprintf(f, |
623 | "%sReusePort: %s\n", | |
60f067b4 | 624 | prefix, yes_no(s->reuse_port)); |
14228c0d | 625 | |
663996b3 MS |
626 | if (s->smack) |
627 | fprintf(f, | |
628 | "%sSmackLabel: %s\n", | |
629 | prefix, s->smack); | |
630 | ||
631 | if (s->smack_ip_in) | |
632 | fprintf(f, | |
633 | "%sSmackLabelIPIn: %s\n", | |
634 | prefix, s->smack_ip_in); | |
635 | ||
636 | if (s->smack_ip_out) | |
637 | fprintf(f, | |
638 | "%sSmackLabelIPOut: %s\n", | |
639 | prefix, s->smack_ip_out); | |
640 | ||
60f067b4 JS |
641 | if (!isempty(s->user) || !isempty(s->group)) |
642 | fprintf(f, | |
aa27b158 MP |
643 | "%sSocketUser: %s\n" |
644 | "%sSocketGroup: %s\n", | |
60f067b4 JS |
645 | prefix, strna(s->user), |
646 | prefix, strna(s->group)); | |
647 | ||
5eef597e MP |
648 | if (s->keep_alive_time > 0) |
649 | fprintf(f, | |
650 | "%sKeepAliveTimeSec: %s\n", | |
651 | prefix, format_timespan(time_string, FORMAT_TIMESPAN_MAX, s->keep_alive_time, USEC_PER_SEC)); | |
652 | ||
653 | if (s->keep_alive_interval) | |
654 | fprintf(f, | |
655 | "%sKeepAliveIntervalSec: %s\n", | |
656 | prefix, format_timespan(time_string, FORMAT_TIMESPAN_MAX, s->keep_alive_interval, USEC_PER_SEC)); | |
657 | ||
658 | if (s->keep_alive_cnt) | |
659 | fprintf(f, | |
660 | "%sKeepAliveProbes: %u\n", | |
661 | prefix, s->keep_alive_cnt); | |
662 | ||
663 | if (s->defer_accept) | |
664 | fprintf(f, | |
665 | "%sDeferAcceptSec: %s\n", | |
666 | prefix, format_timespan(time_string, FORMAT_TIMESPAN_MAX, s->defer_accept, USEC_PER_SEC)); | |
667 | ||
663996b3 MS |
668 | LIST_FOREACH(port, p, s->ports) { |
669 | ||
670 | if (p->type == SOCKET_SOCKET) { | |
671 | const char *t; | |
672 | int r; | |
673 | char *k = NULL; | |
674 | ||
6300502b MP |
675 | r = socket_address_print(&p->address, &k); |
676 | if (r < 0) | |
663996b3 MS |
677 | t = strerror(-r); |
678 | else | |
679 | t = k; | |
680 | ||
681 | fprintf(f, "%s%s: %s\n", prefix, listen_lookup(socket_address_family(&p->address), p->address.type), t); | |
682 | free(k); | |
683 | } else if (p->type == SOCKET_SPECIAL) | |
684 | fprintf(f, "%sListenSpecial: %s\n", prefix, p->path); | |
6300502b MP |
685 | else if (p->type == SOCKET_USB_FUNCTION) |
686 | fprintf(f, "%sListenUSBFunction: %s\n", prefix, p->path); | |
663996b3 MS |
687 | else if (p->type == SOCKET_MQUEUE) |
688 | fprintf(f, "%sListenMessageQueue: %s\n", prefix, p->path); | |
689 | else | |
690 | fprintf(f, "%sListenFIFO: %s\n", prefix, p->path); | |
691 | } | |
692 | ||
aa27b158 MP |
693 | fprintf(f, |
694 | "%sTriggerLimitIntervalSec: %s\n" | |
695 | "%sTriggerLimitBurst: %u\n", | |
696 | prefix, format_timespan(time_string, FORMAT_TIMESPAN_MAX, s->trigger_limit.interval, USEC_PER_SEC), | |
697 | prefix, s->trigger_limit.burst); | |
698 | ||
663996b3 MS |
699 | exec_context_dump(&s->exec_context, f, prefix); |
700 | kill_context_dump(&s->kill_context, f, prefix); | |
701 | ||
702 | for (c = 0; c < _SOCKET_EXEC_COMMAND_MAX; c++) { | |
703 | if (!s->exec_command[c]) | |
704 | continue; | |
705 | ||
706 | fprintf(f, "%s-> %s:\n", | |
707 | prefix, socket_exec_command_to_string(c)); | |
708 | ||
709 | exec_command_dump_list(s->exec_command[c], f, prefix2); | |
710 | } | |
663996b3 MS |
711 | } |
712 | ||
713 | static int instance_from_socket(int fd, unsigned nr, char **instance) { | |
714 | socklen_t l; | |
715 | char *r; | |
60f067b4 | 716 | union sockaddr_union local, remote; |
663996b3 MS |
717 | |
718 | assert(fd >= 0); | |
719 | assert(instance); | |
720 | ||
721 | l = sizeof(local); | |
722 | if (getsockname(fd, &local.sa, &l) < 0) | |
723 | return -errno; | |
724 | ||
725 | l = sizeof(remote); | |
726 | if (getpeername(fd, &remote.sa, &l) < 0) | |
727 | return -errno; | |
728 | ||
729 | switch (local.sa.sa_family) { | |
730 | ||
731 | case AF_INET: { | |
732 | uint32_t | |
5a920b42 MP |
733 | a = be32toh(local.in.sin_addr.s_addr), |
734 | b = be32toh(remote.in.sin_addr.s_addr); | |
663996b3 MS |
735 | |
736 | if (asprintf(&r, | |
737 | "%u-%u.%u.%u.%u:%u-%u.%u.%u.%u:%u", | |
738 | nr, | |
739 | a >> 24, (a >> 16) & 0xFF, (a >> 8) & 0xFF, a & 0xFF, | |
5a920b42 | 740 | be16toh(local.in.sin_port), |
663996b3 | 741 | b >> 24, (b >> 16) & 0xFF, (b >> 8) & 0xFF, b & 0xFF, |
5a920b42 | 742 | be16toh(remote.in.sin_port)) < 0) |
663996b3 MS |
743 | return -ENOMEM; |
744 | ||
745 | break; | |
746 | } | |
747 | ||
748 | case AF_INET6: { | |
749 | static const unsigned char ipv4_prefix[] = { | |
750 | 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0xFF, 0xFF | |
751 | }; | |
752 | ||
753 | if (memcmp(&local.in6.sin6_addr, ipv4_prefix, sizeof(ipv4_prefix)) == 0 && | |
754 | memcmp(&remote.in6.sin6_addr, ipv4_prefix, sizeof(ipv4_prefix)) == 0) { | |
755 | const uint8_t | |
756 | *a = local.in6.sin6_addr.s6_addr+12, | |
757 | *b = remote.in6.sin6_addr.s6_addr+12; | |
758 | ||
759 | if (asprintf(&r, | |
760 | "%u-%u.%u.%u.%u:%u-%u.%u.%u.%u:%u", | |
761 | nr, | |
762 | a[0], a[1], a[2], a[3], | |
5a920b42 | 763 | be16toh(local.in6.sin6_port), |
663996b3 | 764 | b[0], b[1], b[2], b[3], |
5a920b42 | 765 | be16toh(remote.in6.sin6_port)) < 0) |
663996b3 MS |
766 | return -ENOMEM; |
767 | } else { | |
768 | char a[INET6_ADDRSTRLEN], b[INET6_ADDRSTRLEN]; | |
769 | ||
770 | if (asprintf(&r, | |
771 | "%u-%s:%u-%s:%u", | |
772 | nr, | |
773 | inet_ntop(AF_INET6, &local.in6.sin6_addr, a, sizeof(a)), | |
5a920b42 | 774 | be16toh(local.in6.sin6_port), |
663996b3 | 775 | inet_ntop(AF_INET6, &remote.in6.sin6_addr, b, sizeof(b)), |
5a920b42 | 776 | be16toh(remote.in6.sin6_port)) < 0) |
663996b3 MS |
777 | return -ENOMEM; |
778 | } | |
779 | ||
780 | break; | |
781 | } | |
782 | ||
783 | case AF_UNIX: { | |
784 | struct ucred ucred; | |
60f067b4 | 785 | int k; |
663996b3 | 786 | |
60f067b4 JS |
787 | k = getpeercred(fd, &ucred); |
788 | if (k >= 0) { | |
789 | if (asprintf(&r, | |
790 | "%u-"PID_FMT"-"UID_FMT, | |
791 | nr, ucred.pid, ucred.uid) < 0) | |
792 | return -ENOMEM; | |
793 | } else if (k == -ENODATA) { | |
794 | /* This handles the case where somebody is | |
795 | * connecting from another pid/uid namespace | |
796 | * (e.g. from outside of our container). */ | |
797 | if (asprintf(&r, | |
798 | "%u-unknown", | |
799 | nr) < 0) | |
800 | return -ENOMEM; | |
801 | } else | |
802 | return k; | |
663996b3 MS |
803 | |
804 | break; | |
805 | } | |
806 | ||
807 | default: | |
808 | assert_not_reached("Unhandled socket type."); | |
809 | } | |
810 | ||
811 | *instance = r; | |
812 | return 0; | |
813 | } | |
814 | ||
815 | static void socket_close_fds(Socket *s) { | |
816 | SocketPort *p; | |
60f067b4 | 817 | char **i; |
663996b3 MS |
818 | |
819 | assert(s); | |
820 | ||
821 | LIST_FOREACH(port, p, s->ports) { | |
aa27b158 | 822 | bool was_open; |
60f067b4 | 823 | |
aa27b158 | 824 | was_open = p->fd >= 0; |
663996b3 | 825 | |
aa27b158 | 826 | p->event_source = sd_event_source_unref(p->event_source); |
60f067b4 | 827 | p->fd = safe_close(p->fd); |
6300502b | 828 | socket_cleanup_fd_list(p); |
60f067b4 | 829 | |
aa27b158 MP |
830 | /* One little note: we should normally not delete any sockets in the file system here! After all some |
831 | * other process we spawned might still have a reference of this fd and wants to continue to use | |
832 | * it. Therefore we normally delete sockets in the file system before we create a new one, not after we | |
833 | * stopped using one! That all said, if the user explicitly requested this, we'll delete them here | |
834 | * anyway, but only then. */ | |
60f067b4 | 835 | |
aa27b158 MP |
836 | if (!was_open || !s->remove_on_stop) |
837 | continue; | |
60f067b4 | 838 | |
aa27b158 | 839 | switch (p->type) { |
60f067b4 | 840 | |
aa27b158 MP |
841 | case SOCKET_FIFO: |
842 | (void) unlink(p->path); | |
843 | break; | |
663996b3 | 844 | |
aa27b158 MP |
845 | case SOCKET_MQUEUE: |
846 | (void) mq_unlink(p->path); | |
847 | break; | |
663996b3 | 848 | |
aa27b158 MP |
849 | case SOCKET_SOCKET: |
850 | (void) socket_address_unlink(&p->address); | |
851 | break; | |
852 | ||
853 | default: | |
854 | break; | |
60f067b4 | 855 | } |
663996b3 | 856 | } |
60f067b4 JS |
857 | |
858 | if (s->remove_on_stop) | |
859 | STRV_FOREACH(i, s->symlinks) | |
aa27b158 | 860 | (void) unlink(*i); |
663996b3 MS |
861 | } |
862 | ||
863 | static void socket_apply_socket_options(Socket *s, int fd) { | |
5eef597e MP |
864 | int r; |
865 | ||
663996b3 MS |
866 | assert(s); |
867 | assert(fd >= 0); | |
868 | ||
869 | if (s->keep_alive) { | |
870 | int b = s->keep_alive; | |
871 | if (setsockopt(fd, SOL_SOCKET, SO_KEEPALIVE, &b, sizeof(b)) < 0) | |
e3bff60a | 872 | log_unit_warning_errno(UNIT(s), errno, "SO_KEEPALIVE failed: %m"); |
663996b3 MS |
873 | } |
874 | ||
5eef597e MP |
875 | if (s->keep_alive_time) { |
876 | int value = s->keep_alive_time / USEC_PER_SEC; | |
877 | if (setsockopt(fd, SOL_TCP, TCP_KEEPIDLE, &value, sizeof(value)) < 0) | |
e3bff60a | 878 | log_unit_warning_errno(UNIT(s), errno, "TCP_KEEPIDLE failed: %m"); |
5eef597e MP |
879 | } |
880 | ||
881 | if (s->keep_alive_interval) { | |
86f210e9 | 882 | int value = s->keep_alive_interval / USEC_PER_SEC; |
5eef597e | 883 | if (setsockopt(fd, SOL_TCP, TCP_KEEPINTVL, &value, sizeof(value)) < 0) |
e3bff60a | 884 | log_unit_warning_errno(UNIT(s), errno, "TCP_KEEPINTVL failed: %m"); |
5eef597e MP |
885 | } |
886 | ||
887 | if (s->keep_alive_cnt) { | |
888 | int value = s->keep_alive_cnt; | |
d9dfd233 | 889 | if (setsockopt(fd, SOL_TCP, TCP_KEEPCNT, &value, sizeof(value)) < 0) |
e3bff60a | 890 | log_unit_warning_errno(UNIT(s), errno, "TCP_KEEPCNT failed: %m"); |
5eef597e MP |
891 | } |
892 | ||
893 | if (s->defer_accept) { | |
894 | int value = s->defer_accept / USEC_PER_SEC; | |
895 | if (setsockopt(fd, SOL_TCP, TCP_DEFER_ACCEPT, &value, sizeof(value)) < 0) | |
e3bff60a | 896 | log_unit_warning_errno(UNIT(s), errno, "TCP_DEFER_ACCEPT failed: %m"); |
5eef597e MP |
897 | } |
898 | ||
899 | if (s->no_delay) { | |
900 | int b = s->no_delay; | |
4c89c718 MP |
901 | |
902 | if (s->socket_protocol == IPPROTO_SCTP) { | |
903 | if (setsockopt(fd, SOL_SCTP, SCTP_NODELAY, &b, sizeof(b)) < 0) | |
904 | log_unit_warning_errno(UNIT(s), errno, "SCTP_NODELAY failed: %m"); | |
905 | } else { | |
906 | if (setsockopt(fd, SOL_TCP, TCP_NODELAY, &b, sizeof(b)) < 0) | |
907 | log_unit_warning_errno(UNIT(s), errno, "TCP_NODELAY failed: %m"); | |
908 | } | |
5eef597e MP |
909 | } |
910 | ||
663996b3 MS |
911 | if (s->broadcast) { |
912 | int one = 1; | |
913 | if (setsockopt(fd, SOL_SOCKET, SO_BROADCAST, &one, sizeof(one)) < 0) | |
e3bff60a | 914 | log_unit_warning_errno(UNIT(s), errno, "SO_BROADCAST failed: %m"); |
663996b3 MS |
915 | } |
916 | ||
917 | if (s->pass_cred) { | |
918 | int one = 1; | |
919 | if (setsockopt(fd, SOL_SOCKET, SO_PASSCRED, &one, sizeof(one)) < 0) | |
e3bff60a | 920 | log_unit_warning_errno(UNIT(s), errno, "SO_PASSCRED failed: %m"); |
663996b3 MS |
921 | } |
922 | ||
923 | if (s->pass_sec) { | |
924 | int one = 1; | |
925 | if (setsockopt(fd, SOL_SOCKET, SO_PASSSEC, &one, sizeof(one)) < 0) | |
e3bff60a | 926 | log_unit_warning_errno(UNIT(s), errno, "SO_PASSSEC failed: %m"); |
663996b3 MS |
927 | } |
928 | ||
929 | if (s->priority >= 0) | |
930 | if (setsockopt(fd, SOL_SOCKET, SO_PRIORITY, &s->priority, sizeof(s->priority)) < 0) | |
e3bff60a | 931 | log_unit_warning_errno(UNIT(s), errno, "SO_PRIORITY failed: %m"); |
663996b3 MS |
932 | |
933 | if (s->receive_buffer > 0) { | |
934 | int value = (int) s->receive_buffer; | |
935 | ||
936 | /* We first try with SO_RCVBUFFORCE, in case we have the perms for that */ | |
937 | ||
938 | if (setsockopt(fd, SOL_SOCKET, SO_RCVBUFFORCE, &value, sizeof(value)) < 0) | |
939 | if (setsockopt(fd, SOL_SOCKET, SO_RCVBUF, &value, sizeof(value)) < 0) | |
e3bff60a | 940 | log_unit_warning_errno(UNIT(s), errno, "SO_RCVBUF failed: %m"); |
663996b3 MS |
941 | } |
942 | ||
943 | if (s->send_buffer > 0) { | |
944 | int value = (int) s->send_buffer; | |
945 | if (setsockopt(fd, SOL_SOCKET, SO_SNDBUFFORCE, &value, sizeof(value)) < 0) | |
946 | if (setsockopt(fd, SOL_SOCKET, SO_SNDBUF, &value, sizeof(value)) < 0) | |
e3bff60a | 947 | log_unit_warning_errno(UNIT(s), errno, "SO_SNDBUF failed: %m"); |
663996b3 MS |
948 | } |
949 | ||
950 | if (s->mark >= 0) | |
951 | if (setsockopt(fd, SOL_SOCKET, SO_MARK, &s->mark, sizeof(s->mark)) < 0) | |
e3bff60a | 952 | log_unit_warning_errno(UNIT(s), errno, "SO_MARK failed: %m"); |
663996b3 MS |
953 | |
954 | if (s->ip_tos >= 0) | |
955 | if (setsockopt(fd, IPPROTO_IP, IP_TOS, &s->ip_tos, sizeof(s->ip_tos)) < 0) | |
e3bff60a | 956 | log_unit_warning_errno(UNIT(s), errno, "IP_TOS failed: %m"); |
663996b3 MS |
957 | |
958 | if (s->ip_ttl >= 0) { | |
5eef597e | 959 | int x; |
663996b3 MS |
960 | |
961 | r = setsockopt(fd, IPPROTO_IP, IP_TTL, &s->ip_ttl, sizeof(s->ip_ttl)); | |
962 | ||
963 | if (socket_ipv6_is_supported()) | |
964 | x = setsockopt(fd, IPPROTO_IPV6, IPV6_UNICAST_HOPS, &s->ip_ttl, sizeof(s->ip_ttl)); | |
965 | else { | |
966 | x = -1; | |
967 | errno = EAFNOSUPPORT; | |
968 | } | |
969 | ||
970 | if (r < 0 && x < 0) | |
e3bff60a | 971 | log_unit_warning_errno(UNIT(s), errno, "IP_TTL/IPV6_UNICAST_HOPS failed: %m"); |
663996b3 MS |
972 | } |
973 | ||
974 | if (s->tcp_congestion) | |
975 | if (setsockopt(fd, SOL_TCP, TCP_CONGESTION, s->tcp_congestion, strlen(s->tcp_congestion)+1) < 0) | |
e3bff60a | 976 | log_unit_warning_errno(UNIT(s), errno, "TCP_CONGESTION failed: %m"); |
663996b3 | 977 | |
5eef597e | 978 | if (s->smack_ip_in) { |
13d276d0 | 979 | r = mac_smack_apply_fd(fd, SMACK_ATTR_IPIN, s->smack_ip_in); |
5eef597e | 980 | if (r < 0) |
e3bff60a | 981 | log_unit_error_errno(UNIT(s), r, "mac_smack_apply_ip_in_fd: %m"); |
5eef597e | 982 | } |
663996b3 | 983 | |
5eef597e | 984 | if (s->smack_ip_out) { |
13d276d0 | 985 | r = mac_smack_apply_fd(fd, SMACK_ATTR_IPOUT, s->smack_ip_out); |
5eef597e | 986 | if (r < 0) |
e3bff60a | 987 | log_unit_error_errno(UNIT(s), r, "mac_smack_apply_ip_out_fd: %m"); |
5eef597e | 988 | } |
663996b3 MS |
989 | } |
990 | ||
991 | static void socket_apply_fifo_options(Socket *s, int fd) { | |
5eef597e MP |
992 | int r; |
993 | ||
663996b3 MS |
994 | assert(s); |
995 | assert(fd >= 0); | |
996 | ||
997 | if (s->pipe_size > 0) | |
998 | if (fcntl(fd, F_SETPIPE_SZ, s->pipe_size) < 0) | |
6300502b | 999 | log_unit_warning_errno(UNIT(s), errno, "Setting pipe size failed, ignoring: %m"); |
663996b3 | 1000 | |
5eef597e | 1001 | if (s->smack) { |
13d276d0 | 1002 | r = mac_smack_apply_fd(fd, SMACK_ATTR_ACCESS, s->smack); |
5eef597e | 1003 | if (r < 0) |
6300502b | 1004 | log_unit_error_errno(UNIT(s), r, "SMACK relabelling failed, ignoring: %m"); |
5eef597e | 1005 | } |
663996b3 MS |
1006 | } |
1007 | ||
1008 | static int fifo_address_create( | |
1009 | const char *path, | |
1010 | mode_t directory_mode, | |
6300502b | 1011 | mode_t socket_mode) { |
663996b3 | 1012 | |
6300502b | 1013 | _cleanup_close_ int fd = -1; |
663996b3 | 1014 | mode_t old_mask; |
6300502b MP |
1015 | struct stat st; |
1016 | int r; | |
663996b3 MS |
1017 | |
1018 | assert(path); | |
663996b3 MS |
1019 | |
1020 | mkdir_parents_label(path, directory_mode); | |
1021 | ||
5eef597e | 1022 | r = mac_selinux_create_file_prepare(path, S_IFIFO); |
663996b3 | 1023 | if (r < 0) |
6300502b | 1024 | return r; |
663996b3 MS |
1025 | |
1026 | /* Enforce the right access mode for the fifo */ | |
1027 | old_mask = umask(~ socket_mode); | |
1028 | ||
1029 | /* Include the original umask in our mask */ | |
6300502b | 1030 | (void) umask(~socket_mode | old_mask); |
663996b3 MS |
1031 | |
1032 | r = mkfifo(path, socket_mode); | |
6300502b | 1033 | (void) umask(old_mask); |
663996b3 MS |
1034 | |
1035 | if (r < 0 && errno != EEXIST) { | |
1036 | r = -errno; | |
1037 | goto fail; | |
1038 | } | |
1039 | ||
6300502b MP |
1040 | fd = open(path, O_RDWR | O_CLOEXEC | O_NOCTTY | O_NONBLOCK | O_NOFOLLOW); |
1041 | if (fd < 0) { | |
663996b3 MS |
1042 | r = -errno; |
1043 | goto fail; | |
1044 | } | |
1045 | ||
5eef597e | 1046 | mac_selinux_create_file_clear(); |
663996b3 MS |
1047 | |
1048 | if (fstat(fd, &st) < 0) { | |
1049 | r = -errno; | |
1050 | goto fail; | |
1051 | } | |
1052 | ||
1053 | if (!S_ISFIFO(st.st_mode) || | |
1054 | (st.st_mode & 0777) != (socket_mode & ~old_mask) || | |
1055 | st.st_uid != getuid() || | |
1056 | st.st_gid != getgid()) { | |
663996b3 MS |
1057 | r = -EEXIST; |
1058 | goto fail; | |
1059 | } | |
1060 | ||
6300502b MP |
1061 | r = fd; |
1062 | fd = -1; | |
1063 | ||
1064 | return r; | |
663996b3 MS |
1065 | |
1066 | fail: | |
5eef597e | 1067 | mac_selinux_create_file_clear(); |
663996b3 MS |
1068 | return r; |
1069 | } | |
1070 | ||
6300502b MP |
1071 | static int special_address_create(const char *path, bool writable) { |
1072 | _cleanup_close_ int fd = -1; | |
663996b3 | 1073 | struct stat st; |
6300502b | 1074 | int r; |
663996b3 MS |
1075 | |
1076 | assert(path); | |
663996b3 | 1077 | |
6300502b MP |
1078 | fd = open(path, (writable ? O_RDWR : O_RDONLY)|O_CLOEXEC|O_NOCTTY|O_NONBLOCK|O_NOFOLLOW); |
1079 | if (fd < 0) | |
1080 | return -errno; | |
663996b3 | 1081 | |
6300502b MP |
1082 | if (fstat(fd, &st) < 0) |
1083 | return -errno; | |
663996b3 MS |
1084 | |
1085 | /* Check whether this is a /proc, /sys or /dev file or char device */ | |
6300502b MP |
1086 | if (!S_ISREG(st.st_mode) && !S_ISCHR(st.st_mode)) |
1087 | return -EEXIST; | |
663996b3 | 1088 | |
6300502b MP |
1089 | r = fd; |
1090 | fd = -1; | |
663996b3 | 1091 | |
6300502b MP |
1092 | return r; |
1093 | } | |
1094 | ||
1095 | static int usbffs_address_create(const char *path) { | |
1096 | _cleanup_close_ int fd = -1; | |
1097 | struct stat st; | |
1098 | int r; | |
1099 | ||
1100 | assert(path); | |
1101 | ||
1102 | fd = open(path, O_RDWR|O_CLOEXEC|O_NOCTTY|O_NONBLOCK|O_NOFOLLOW); | |
1103 | if (fd < 0) | |
1104 | return -errno; | |
1105 | ||
1106 | if (fstat(fd, &st) < 0) | |
1107 | return -errno; | |
1108 | ||
1109 | /* Check whether this is a regular file (ffs endpoint)*/ | |
1110 | if (!S_ISREG(st.st_mode)) | |
1111 | return -EEXIST; | |
1112 | ||
1113 | r = fd; | |
1114 | fd = -1; | |
663996b3 MS |
1115 | |
1116 | return r; | |
1117 | } | |
1118 | ||
1119 | static int mq_address_create( | |
1120 | const char *path, | |
1121 | mode_t mq_mode, | |
1122 | long maxmsg, | |
6300502b | 1123 | long msgsize) { |
663996b3 | 1124 | |
6300502b | 1125 | _cleanup_close_ int fd = -1; |
663996b3 MS |
1126 | struct stat st; |
1127 | mode_t old_mask; | |
1128 | struct mq_attr _attr, *attr = NULL; | |
6300502b | 1129 | int r; |
663996b3 MS |
1130 | |
1131 | assert(path); | |
663996b3 MS |
1132 | |
1133 | if (maxmsg > 0 && msgsize > 0) { | |
6300502b MP |
1134 | _attr = (struct mq_attr) { |
1135 | .mq_flags = O_NONBLOCK, | |
1136 | .mq_maxmsg = maxmsg, | |
1137 | .mq_msgsize = msgsize, | |
1138 | }; | |
663996b3 MS |
1139 | attr = &_attr; |
1140 | } | |
1141 | ||
1142 | /* Enforce the right access mode for the mq */ | |
1143 | old_mask = umask(~ mq_mode); | |
1144 | ||
1145 | /* Include the original umask in our mask */ | |
6300502b | 1146 | (void) umask(~mq_mode | old_mask); |
663996b3 | 1147 | fd = mq_open(path, O_RDONLY|O_CLOEXEC|O_NONBLOCK|O_CREAT, mq_mode, attr); |
6300502b | 1148 | (void) umask(old_mask); |
663996b3 | 1149 | |
6300502b MP |
1150 | if (fd < 0) |
1151 | return -errno; | |
663996b3 | 1152 | |
6300502b MP |
1153 | if (fstat(fd, &st) < 0) |
1154 | return -errno; | |
663996b3 MS |
1155 | |
1156 | if ((st.st_mode & 0777) != (mq_mode & ~old_mask) || | |
1157 | st.st_uid != getuid() || | |
6300502b MP |
1158 | st.st_gid != getgid()) |
1159 | return -EEXIST; | |
663996b3 | 1160 | |
6300502b MP |
1161 | r = fd; |
1162 | fd = -1; | |
663996b3 | 1163 | |
663996b3 MS |
1164 | return r; |
1165 | } | |
1166 | ||
60f067b4 JS |
1167 | static int socket_symlink(Socket *s) { |
1168 | const char *p; | |
1169 | char **i; | |
1170 | ||
1171 | assert(s); | |
1172 | ||
1173 | p = socket_find_symlink_target(s); | |
1174 | if (!p) | |
1175 | return 0; | |
1176 | ||
1177 | STRV_FOREACH(i, s->symlinks) | |
5eef597e | 1178 | symlink_label(p, *i); |
60f067b4 JS |
1179 | |
1180 | return 0; | |
1181 | } | |
1182 | ||
6300502b MP |
1183 | static int usbffs_write_descs(int fd, Service *s) { |
1184 | int r; | |
1185 | ||
1186 | if (!s->usb_function_descriptors || !s->usb_function_strings) | |
1187 | return -EINVAL; | |
1188 | ||
1189 | r = copy_file_fd(s->usb_function_descriptors, fd, false); | |
1190 | if (r < 0) | |
1191 | return r; | |
1192 | ||
1193 | return copy_file_fd(s->usb_function_strings, fd, false); | |
1194 | } | |
1195 | ||
1196 | static int usbffs_select_ep(const struct dirent *d) { | |
1197 | return d->d_name[0] != '.' && !streq(d->d_name, "ep0"); | |
1198 | } | |
1199 | ||
1200 | static int usbffs_dispatch_eps(SocketPort *p) { | |
1201 | _cleanup_free_ struct dirent **ent = NULL; | |
1202 | _cleanup_free_ char *path = NULL; | |
1203 | int r, i, n, k; | |
1204 | ||
db2df898 MP |
1205 | path = dirname_malloc(p->path); |
1206 | if (!path) | |
1207 | return -ENOMEM; | |
6300502b MP |
1208 | |
1209 | r = scandir(path, &ent, usbffs_select_ep, alphasort); | |
1210 | if (r < 0) | |
1211 | return -errno; | |
1212 | ||
1213 | n = r; | |
1214 | p->auxiliary_fds = new(int, n); | |
1215 | if (!p->auxiliary_fds) | |
1216 | return -ENOMEM; | |
1217 | ||
1218 | p->n_auxiliary_fds = n; | |
1219 | ||
1220 | k = 0; | |
1221 | for (i = 0; i < n; ++i) { | |
1222 | _cleanup_free_ char *ep = NULL; | |
1223 | ||
1224 | ep = path_make_absolute(ent[i]->d_name, path); | |
1225 | if (!ep) | |
1226 | return -ENOMEM; | |
1227 | ||
1228 | path_kill_slashes(ep); | |
1229 | ||
1230 | r = usbffs_address_create(ep); | |
1231 | if (r < 0) | |
1232 | goto fail; | |
1233 | ||
1234 | p->auxiliary_fds[k] = r; | |
1235 | ||
1236 | ++k; | |
1237 | free(ent[i]); | |
1238 | } | |
1239 | ||
1240 | return r; | |
1241 | ||
1242 | fail: | |
1243 | close_many(p->auxiliary_fds, k); | |
1244 | p->auxiliary_fds = mfree(p->auxiliary_fds); | |
1245 | p->n_auxiliary_fds = 0; | |
1246 | ||
1247 | return r; | |
1248 | } | |
1249 | ||
aa27b158 MP |
1250 | static int socket_determine_selinux_label(Socket *s, char **ret) { |
1251 | ExecCommand *c; | |
1252 | int r; | |
1253 | ||
1254 | assert(s); | |
1255 | assert(ret); | |
1256 | ||
1257 | if (s->selinux_context_from_net) { | |
1258 | /* If this is requested, get label from the network label */ | |
1259 | ||
1260 | r = mac_selinux_get_our_label(ret); | |
1261 | if (r == -EOPNOTSUPP) | |
1262 | goto no_label; | |
1263 | ||
1264 | } else { | |
1265 | /* Otherwise, get it from the executable we are about to start */ | |
1266 | r = socket_instantiate_service(s); | |
1267 | if (r < 0) | |
1268 | return r; | |
1269 | ||
1270 | if (!UNIT_ISSET(s->service)) | |
1271 | goto no_label; | |
1272 | ||
1273 | c = SERVICE(UNIT_DEREF(s->service))->exec_command[SERVICE_EXEC_START]; | |
1274 | if (!c) | |
1275 | goto no_label; | |
1276 | ||
1277 | r = mac_selinux_get_create_label_from_exe(c->path, ret); | |
1278 | if (r == -EPERM || r == -EOPNOTSUPP) | |
1279 | goto no_label; | |
1280 | } | |
1281 | ||
1282 | return r; | |
1283 | ||
1284 | no_label: | |
1285 | *ret = NULL; | |
1286 | return 0; | |
1287 | } | |
1288 | ||
663996b3 | 1289 | static int socket_open_fds(Socket *s) { |
6300502b MP |
1290 | _cleanup_(mac_selinux_freep) char *label = NULL; |
1291 | bool know_label = false; | |
663996b3 MS |
1292 | SocketPort *p; |
1293 | int r; | |
663996b3 MS |
1294 | |
1295 | assert(s); | |
1296 | ||
1297 | LIST_FOREACH(port, p, s->ports) { | |
1298 | ||
1299 | if (p->fd >= 0) | |
1300 | continue; | |
1301 | ||
6300502b MP |
1302 | switch (p->type) { |
1303 | ||
1304 | case SOCKET_SOCKET: | |
663996b3 MS |
1305 | |
1306 | if (!know_label) { | |
aa27b158 MP |
1307 | /* Figure out label, if we don't it know yet. We do it once, for the first socket where |
1308 | * we need this and remember it for the rest. */ | |
5eef597e | 1309 | |
aa27b158 MP |
1310 | r = socket_determine_selinux_label(s, &label); |
1311 | if (r < 0) | |
1312 | goto rollback; | |
663996b3 MS |
1313 | |
1314 | know_label = true; | |
1315 | } | |
1316 | ||
4c89c718 | 1317 | /* Apply the socket protocol */ |
aa27b158 MP |
1318 | switch (p->address.type) { |
1319 | ||
4c89c718 MP |
1320 | case SOCK_STREAM: |
1321 | case SOCK_SEQPACKET: | |
aa27b158 MP |
1322 | if (s->socket_protocol == IPPROTO_SCTP) |
1323 | p->address.protocol = s->socket_protocol; | |
4c89c718 | 1324 | break; |
aa27b158 | 1325 | |
4c89c718 | 1326 | case SOCK_DGRAM: |
aa27b158 MP |
1327 | if (s->socket_protocol == IPPROTO_UDPLITE) |
1328 | p->address.protocol = s->socket_protocol; | |
4c89c718 MP |
1329 | break; |
1330 | } | |
1331 | ||
60f067b4 JS |
1332 | r = socket_address_listen( |
1333 | &p->address, | |
1334 | SOCK_CLOEXEC|SOCK_NONBLOCK, | |
1335 | s->backlog, | |
1336 | s->bind_ipv6_only, | |
1337 | s->bind_to_device, | |
fb183854 | 1338 | s->reuse_port, |
60f067b4 JS |
1339 | s->free_bind, |
1340 | s->transparent, | |
1341 | s->directory_mode, | |
1342 | s->socket_mode, | |
1343 | label); | |
1344 | if (r < 0) | |
663996b3 MS |
1345 | goto rollback; |
1346 | ||
60f067b4 | 1347 | p->fd = r; |
663996b3 | 1348 | socket_apply_socket_options(s, p->fd); |
60f067b4 | 1349 | socket_symlink(s); |
6300502b | 1350 | break; |
663996b3 | 1351 | |
6300502b | 1352 | case SOCKET_SPECIAL: |
663996b3 | 1353 | |
6300502b MP |
1354 | p->fd = special_address_create(p->path, s->writable); |
1355 | if (p->fd < 0) { | |
1356 | r = p->fd; | |
663996b3 | 1357 | goto rollback; |
6300502b MP |
1358 | } |
1359 | break; | |
663996b3 | 1360 | |
6300502b | 1361 | case SOCKET_FIFO: |
663996b3 | 1362 | |
6300502b | 1363 | p->fd = fifo_address_create( |
60f067b4 JS |
1364 | p->path, |
1365 | s->directory_mode, | |
6300502b MP |
1366 | s->socket_mode); |
1367 | if (p->fd < 0) { | |
1368 | r = p->fd; | |
663996b3 | 1369 | goto rollback; |
6300502b | 1370 | } |
663996b3 MS |
1371 | |
1372 | socket_apply_fifo_options(s, p->fd); | |
60f067b4 | 1373 | socket_symlink(s); |
6300502b | 1374 | break; |
60f067b4 | 1375 | |
6300502b | 1376 | case SOCKET_MQUEUE: |
663996b3 | 1377 | |
6300502b | 1378 | p->fd = mq_address_create( |
60f067b4 JS |
1379 | p->path, |
1380 | s->socket_mode, | |
1381 | s->mq_maxmsg, | |
6300502b MP |
1382 | s->mq_msgsize); |
1383 | if (p->fd < 0) { | |
1384 | r = p->fd; | |
1385 | goto rollback; | |
1386 | } | |
1387 | break; | |
1388 | ||
aa27b158 MP |
1389 | case SOCKET_USB_FUNCTION: { |
1390 | _cleanup_free_ char *ep = NULL; | |
6300502b | 1391 | |
aa27b158 MP |
1392 | ep = path_make_absolute("ep0", p->path); |
1393 | ||
1394 | p->fd = usbffs_address_create(ep); | |
6300502b MP |
1395 | if (p->fd < 0) { |
1396 | r = p->fd; | |
1397 | goto rollback; | |
1398 | } | |
1399 | ||
1400 | r = usbffs_write_descs(p->fd, SERVICE(UNIT_DEREF(s->service))); | |
60f067b4 | 1401 | if (r < 0) |
663996b3 | 1402 | goto rollback; |
6300502b MP |
1403 | |
1404 | r = usbffs_dispatch_eps(p); | |
1405 | if (r < 0) | |
1406 | goto rollback; | |
1407 | ||
1408 | break; | |
aa27b158 | 1409 | } |
6300502b | 1410 | default: |
663996b3 | 1411 | assert_not_reached("Unknown port type"); |
6300502b | 1412 | } |
663996b3 MS |
1413 | } |
1414 | ||
663996b3 MS |
1415 | return 0; |
1416 | ||
1417 | rollback: | |
1418 | socket_close_fds(s); | |
663996b3 MS |
1419 | return r; |
1420 | } | |
1421 | ||
1422 | static void socket_unwatch_fds(Socket *s) { | |
1423 | SocketPort *p; | |
60f067b4 | 1424 | int r; |
663996b3 MS |
1425 | |
1426 | assert(s); | |
1427 | ||
1428 | LIST_FOREACH(port, p, s->ports) { | |
1429 | if (p->fd < 0) | |
1430 | continue; | |
1431 | ||
60f067b4 JS |
1432 | if (!p->event_source) |
1433 | continue; | |
1434 | ||
1435 | r = sd_event_source_set_enabled(p->event_source, SD_EVENT_OFF); | |
1436 | if (r < 0) | |
e3bff60a | 1437 | log_unit_debug_errno(UNIT(s), r, "Failed to disable event source: %m"); |
663996b3 MS |
1438 | } |
1439 | } | |
1440 | ||
1441 | static int socket_watch_fds(Socket *s) { | |
1442 | SocketPort *p; | |
1443 | int r; | |
1444 | ||
1445 | assert(s); | |
1446 | ||
1447 | LIST_FOREACH(port, p, s->ports) { | |
1448 | if (p->fd < 0) | |
1449 | continue; | |
1450 | ||
e3bff60a | 1451 | if (p->event_source) { |
60f067b4 | 1452 | r = sd_event_source_set_enabled(p->event_source, SD_EVENT_ON); |
e3bff60a MP |
1453 | if (r < 0) |
1454 | goto fail; | |
1455 | } else { | |
60f067b4 | 1456 | r = sd_event_add_io(UNIT(s)->manager->event, &p->event_source, p->fd, EPOLLIN, socket_dispatch_io, p); |
e3bff60a MP |
1457 | if (r < 0) |
1458 | goto fail; | |
663996b3 | 1459 | |
e3bff60a | 1460 | (void) sd_event_source_set_description(p->event_source, "socket-port-io"); |
60f067b4 | 1461 | } |
663996b3 MS |
1462 | } |
1463 | ||
1464 | return 0; | |
1465 | ||
1466 | fail: | |
e3bff60a | 1467 | log_unit_warning_errno(UNIT(s), r, "Failed to watch listening fds: %m"); |
663996b3 MS |
1468 | socket_unwatch_fds(s); |
1469 | return r; | |
1470 | } | |
1471 | ||
aa27b158 MP |
1472 | enum { |
1473 | SOCKET_OPEN_NONE, | |
1474 | SOCKET_OPEN_SOME, | |
1475 | SOCKET_OPEN_ALL, | |
1476 | }; | |
1477 | ||
1478 | static int socket_check_open(Socket *s) { | |
1479 | bool have_open = false, have_closed = false; | |
1480 | SocketPort *p; | |
1481 | ||
1482 | assert(s); | |
1483 | ||
1484 | LIST_FOREACH(port, p, s->ports) { | |
1485 | if (p->fd < 0) | |
1486 | have_closed = true; | |
1487 | else | |
1488 | have_open = true; | |
1489 | ||
1490 | if (have_open && have_closed) | |
1491 | return SOCKET_OPEN_SOME; | |
1492 | } | |
1493 | ||
1494 | if (have_open) | |
1495 | return SOCKET_OPEN_ALL; | |
1496 | ||
1497 | return SOCKET_OPEN_NONE; | |
1498 | } | |
1499 | ||
663996b3 MS |
1500 | static void socket_set_state(Socket *s, SocketState state) { |
1501 | SocketState old_state; | |
1502 | assert(s); | |
1503 | ||
1504 | old_state = s->state; | |
1505 | s->state = state; | |
1506 | ||
60f067b4 JS |
1507 | if (!IN_SET(state, |
1508 | SOCKET_START_PRE, | |
1509 | SOCKET_START_CHOWN, | |
1510 | SOCKET_START_POST, | |
1511 | SOCKET_STOP_PRE, | |
1512 | SOCKET_STOP_PRE_SIGTERM, | |
1513 | SOCKET_STOP_PRE_SIGKILL, | |
1514 | SOCKET_STOP_POST, | |
1515 | SOCKET_FINAL_SIGTERM, | |
1516 | SOCKET_FINAL_SIGKILL)) { | |
1517 | ||
1518 | s->timer_event_source = sd_event_source_unref(s->timer_event_source); | |
663996b3 MS |
1519 | socket_unwatch_control_pid(s); |
1520 | s->control_command = NULL; | |
1521 | s->control_command_id = _SOCKET_EXEC_COMMAND_INVALID; | |
1522 | } | |
1523 | ||
1524 | if (state != SOCKET_LISTENING) | |
1525 | socket_unwatch_fds(s); | |
1526 | ||
60f067b4 JS |
1527 | if (!IN_SET(state, |
1528 | SOCKET_START_CHOWN, | |
1529 | SOCKET_START_POST, | |
1530 | SOCKET_LISTENING, | |
1531 | SOCKET_RUNNING, | |
1532 | SOCKET_STOP_PRE, | |
1533 | SOCKET_STOP_PRE_SIGTERM, | |
1534 | SOCKET_STOP_PRE_SIGKILL)) | |
663996b3 MS |
1535 | socket_close_fds(s); |
1536 | ||
1537 | if (state != old_state) | |
e3bff60a | 1538 | log_unit_debug(UNIT(s), "Changed %s -> %s", socket_state_to_string(old_state), socket_state_to_string(state)); |
663996b3 MS |
1539 | |
1540 | unit_notify(UNIT(s), state_translation_table[old_state], state_translation_table[state], true); | |
1541 | } | |
1542 | ||
1543 | static int socket_coldplug(Unit *u) { | |
1544 | Socket *s = SOCKET(u); | |
1545 | int r; | |
1546 | ||
1547 | assert(s); | |
1548 | assert(s->state == SOCKET_DEAD); | |
1549 | ||
60f067b4 JS |
1550 | if (s->deserialized_state == s->state) |
1551 | return 0; | |
663996b3 | 1552 | |
db2df898 MP |
1553 | if (s->control_pid > 0 && |
1554 | pid_is_unwaited(s->control_pid) && | |
1555 | IN_SET(s->deserialized_state, | |
60f067b4 JS |
1556 | SOCKET_START_PRE, |
1557 | SOCKET_START_CHOWN, | |
1558 | SOCKET_START_POST, | |
1559 | SOCKET_STOP_PRE, | |
1560 | SOCKET_STOP_PRE_SIGTERM, | |
1561 | SOCKET_STOP_PRE_SIGKILL, | |
1562 | SOCKET_STOP_POST, | |
1563 | SOCKET_FINAL_SIGTERM, | |
1564 | SOCKET_FINAL_SIGKILL)) { | |
1565 | ||
60f067b4 JS |
1566 | r = unit_watch_pid(UNIT(s), s->control_pid); |
1567 | if (r < 0) | |
1568 | return r; | |
663996b3 | 1569 | |
4c89c718 | 1570 | r = socket_arm_timer(s, usec_add(u->state_change_timestamp.monotonic, s->timeout_usec)); |
60f067b4 JS |
1571 | if (r < 0) |
1572 | return r; | |
1573 | } | |
663996b3 | 1574 | |
60f067b4 JS |
1575 | if (IN_SET(s->deserialized_state, |
1576 | SOCKET_START_CHOWN, | |
1577 | SOCKET_START_POST, | |
1578 | SOCKET_LISTENING, | |
aa27b158 MP |
1579 | SOCKET_RUNNING)) { |
1580 | ||
1581 | /* Originally, we used to simply reopen all sockets here that we didn't have file descriptors | |
1582 | * for. However, this is problematic, as we won't traverse throught the SOCKET_START_CHOWN state for | |
1583 | * them, and thus the UID/GID wouldn't be right. Hence, instead simply check if we have all fds open, | |
1584 | * and if there's a mismatch, warn loudly. */ | |
1585 | ||
1586 | r = socket_check_open(s); | |
1587 | if (r == SOCKET_OPEN_NONE) | |
1588 | log_unit_warning(UNIT(s), | |
1589 | "Socket unit configuration has changed while unit has been running, " | |
1590 | "no open socket file descriptor left. " | |
1591 | "The socket unit is not functional until restarted."); | |
1592 | else if (r == SOCKET_OPEN_SOME) | |
1593 | log_unit_warning(UNIT(s), | |
1594 | "Socket unit configuration has changed while unit has been running, " | |
1595 | "and some socket file descriptors have not been opened yet. " | |
1596 | "The socket unit is not fully functional until restarted."); | |
60f067b4 | 1597 | } |
663996b3 | 1598 | |
60f067b4 JS |
1599 | if (s->deserialized_state == SOCKET_LISTENING) { |
1600 | r = socket_watch_fds(s); | |
1601 | if (r < 0) | |
1602 | return r; | |
663996b3 MS |
1603 | } |
1604 | ||
60f067b4 | 1605 | socket_set_state(s, s->deserialized_state); |
663996b3 MS |
1606 | return 0; |
1607 | } | |
1608 | ||
1609 | static int socket_spawn(Socket *s, ExecCommand *c, pid_t *_pid) { | |
60f067b4 | 1610 | _cleanup_free_ char **argv = NULL; |
663996b3 MS |
1611 | pid_t pid; |
1612 | int r; | |
5eef597e MP |
1613 | ExecParameters exec_params = { |
1614 | .apply_permissions = true, | |
1615 | .apply_chroot = true, | |
1616 | .apply_tty_stdin = true, | |
db2df898 MP |
1617 | .stdin_fd = -1, |
1618 | .stdout_fd = -1, | |
1619 | .stderr_fd = -1, | |
5eef597e | 1620 | }; |
663996b3 MS |
1621 | |
1622 | assert(s); | |
1623 | assert(c); | |
1624 | assert(_pid); | |
1625 | ||
e3bff60a MP |
1626 | (void) unit_realize_cgroup(UNIT(s)); |
1627 | if (s->reset_cpu_usage) { | |
1628 | (void) unit_reset_cpu_usage(UNIT(s)); | |
1629 | s->reset_cpu_usage = false; | |
1630 | } | |
14228c0d | 1631 | |
60f067b4 JS |
1632 | r = unit_setup_exec_runtime(UNIT(s)); |
1633 | if (r < 0) | |
4c89c718 | 1634 | return r; |
60f067b4 | 1635 | |
4c89c718 | 1636 | r = socket_arm_timer(s, usec_add(now(CLOCK_MONOTONIC), s->timeout_usec)); |
663996b3 | 1637 | if (r < 0) |
4c89c718 | 1638 | return r; |
663996b3 | 1639 | |
14228c0d MB |
1640 | r = unit_full_printf_strv(UNIT(s), c->argv, &argv); |
1641 | if (r < 0) | |
4c89c718 | 1642 | return r; |
663996b3 | 1643 | |
5eef597e MP |
1644 | exec_params.argv = argv; |
1645 | exec_params.environment = UNIT(s)->manager->environment; | |
1646 | exec_params.confirm_spawn = UNIT(s)->manager->confirm_spawn; | |
1647 | exec_params.cgroup_supported = UNIT(s)->manager->cgroup_supported; | |
1648 | exec_params.cgroup_path = UNIT(s)->cgroup_path; | |
f47781d8 | 1649 | exec_params.cgroup_delegate = s->cgroup_context.delegate; |
5eef597e | 1650 | exec_params.runtime_prefix = manager_get_runtime_prefix(UNIT(s)->manager); |
5eef597e | 1651 | |
e3bff60a MP |
1652 | r = exec_spawn(UNIT(s), |
1653 | c, | |
663996b3 | 1654 | &s->exec_context, |
5eef597e | 1655 | &exec_params, |
60f067b4 | 1656 | s->exec_runtime, |
663996b3 | 1657 | &pid); |
e842803a | 1658 | if (r < 0) |
4c89c718 | 1659 | return r; |
663996b3 | 1660 | |
60f067b4 | 1661 | r = unit_watch_pid(UNIT(s), pid); |
663996b3 | 1662 | if (r < 0) |
663996b3 | 1663 | /* FIXME: we need to do something here */ |
4c89c718 | 1664 | return r; |
663996b3 MS |
1665 | |
1666 | *_pid = pid; | |
663996b3 | 1667 | return 0; |
60f067b4 JS |
1668 | } |
1669 | ||
1670 | static int socket_chown(Socket *s, pid_t *_pid) { | |
1671 | pid_t pid; | |
1672 | int r; | |
663996b3 | 1673 | |
4c89c718 | 1674 | r = socket_arm_timer(s, usec_add(now(CLOCK_MONOTONIC), s->timeout_usec)); |
60f067b4 JS |
1675 | if (r < 0) |
1676 | goto fail; | |
1677 | ||
1678 | /* We have to resolve the user names out-of-process, hence | |
1679 | * let's fork here. It's messy, but well, what can we do? */ | |
1680 | ||
1681 | pid = fork(); | |
1682 | if (pid < 0) | |
1683 | return -errno; | |
1684 | ||
1685 | if (pid == 0) { | |
1686 | SocketPort *p; | |
f47781d8 MP |
1687 | uid_t uid = UID_INVALID; |
1688 | gid_t gid = GID_INVALID; | |
60f067b4 JS |
1689 | int ret; |
1690 | ||
86f210e9 MP |
1691 | (void) default_signals(SIGNALS_CRASH_HANDLER, SIGNALS_IGNORE, -1); |
1692 | (void) ignore_signals(SIGPIPE, -1); | |
60f067b4 JS |
1693 | log_forget_fds(); |
1694 | ||
1695 | if (!isempty(s->user)) { | |
1696 | const char *user = s->user; | |
1697 | ||
1698 | r = get_user_creds(&user, &uid, &gid, NULL, NULL); | |
1699 | if (r < 0) { | |
1700 | ret = EXIT_USER; | |
1701 | goto fail_child; | |
1702 | } | |
1703 | } | |
1704 | ||
1705 | if (!isempty(s->group)) { | |
1706 | const char *group = s->group; | |
1707 | ||
1708 | r = get_group_creds(&group, &gid); | |
1709 | if (r < 0) { | |
1710 | ret = EXIT_GROUP; | |
1711 | goto fail_child; | |
1712 | } | |
1713 | } | |
1714 | ||
1715 | LIST_FOREACH(port, p, s->ports) { | |
1716 | const char *path = NULL; | |
1717 | ||
1718 | if (p->type == SOCKET_SOCKET) | |
1719 | path = socket_address_get_path(&p->address); | |
1720 | else if (p->type == SOCKET_FIFO) | |
1721 | path = p->path; | |
1722 | ||
1723 | if (!path) | |
1724 | continue; | |
1725 | ||
1726 | if (chown(path, uid, gid) < 0) { | |
1727 | r = -errno; | |
1728 | ret = EXIT_CHOWN; | |
1729 | goto fail_child; | |
1730 | } | |
1731 | } | |
1732 | ||
1733 | _exit(0); | |
1734 | ||
1735 | fail_child: | |
1736 | log_open(); | |
f47781d8 | 1737 | log_error_errno(r, "Failed to chown socket at step %s: %m", exit_status_to_string(ret, EXIT_STATUS_SYSTEMD)); |
60f067b4 JS |
1738 | |
1739 | _exit(ret); | |
1740 | } | |
1741 | ||
1742 | r = unit_watch_pid(UNIT(s), pid); | |
1743 | if (r < 0) | |
1744 | goto fail; | |
1745 | ||
1746 | *_pid = pid; | |
1747 | return 0; | |
1748 | ||
1749 | fail: | |
1750 | s->timer_event_source = sd_event_source_unref(s->timer_event_source); | |
663996b3 MS |
1751 | return r; |
1752 | } | |
1753 | ||
1754 | static void socket_enter_dead(Socket *s, SocketResult f) { | |
1755 | assert(s); | |
1756 | ||
1757 | if (f != SOCKET_SUCCESS) | |
1758 | s->result = f; | |
1759 | ||
60f067b4 JS |
1760 | exec_runtime_destroy(s->exec_runtime); |
1761 | s->exec_runtime = exec_runtime_unref(s->exec_runtime); | |
1762 | ||
1763 | exec_context_destroy_runtime_directory(&s->exec_context, manager_get_runtime_prefix(UNIT(s)->manager)); | |
1764 | ||
663996b3 MS |
1765 | socket_set_state(s, s->result != SOCKET_SUCCESS ? SOCKET_FAILED : SOCKET_DEAD); |
1766 | } | |
1767 | ||
1768 | static void socket_enter_signal(Socket *s, SocketState state, SocketResult f); | |
1769 | ||
1770 | static void socket_enter_stop_post(Socket *s, SocketResult f) { | |
1771 | int r; | |
1772 | assert(s); | |
1773 | ||
1774 | if (f != SOCKET_SUCCESS) | |
1775 | s->result = f; | |
1776 | ||
1777 | socket_unwatch_control_pid(s); | |
663996b3 | 1778 | s->control_command_id = SOCKET_EXEC_STOP_POST; |
60f067b4 | 1779 | s->control_command = s->exec_command[SOCKET_EXEC_STOP_POST]; |
663996b3 | 1780 | |
60f067b4 JS |
1781 | if (s->control_command) { |
1782 | r = socket_spawn(s, s->control_command, &s->control_pid); | |
1783 | if (r < 0) | |
663996b3 MS |
1784 | goto fail; |
1785 | ||
1786 | socket_set_state(s, SOCKET_STOP_POST); | |
1787 | } else | |
1788 | socket_enter_signal(s, SOCKET_FINAL_SIGTERM, SOCKET_SUCCESS); | |
1789 | ||
1790 | return; | |
1791 | ||
1792 | fail: | |
e3bff60a | 1793 | log_unit_warning_errno(UNIT(s), r, "Failed to run 'stop-post' task: %m"); |
663996b3 MS |
1794 | socket_enter_signal(s, SOCKET_FINAL_SIGTERM, SOCKET_FAILURE_RESOURCES); |
1795 | } | |
1796 | ||
1797 | static void socket_enter_signal(Socket *s, SocketState state, SocketResult f) { | |
1798 | int r; | |
1799 | ||
1800 | assert(s); | |
1801 | ||
1802 | if (f != SOCKET_SUCCESS) | |
1803 | s->result = f; | |
1804 | ||
1805 | r = unit_kill_context( | |
1806 | UNIT(s), | |
1807 | &s->kill_context, | |
5eef597e MP |
1808 | (state != SOCKET_STOP_PRE_SIGTERM && state != SOCKET_FINAL_SIGTERM) ? |
1809 | KILL_KILL : KILL_TERMINATE, | |
663996b3 MS |
1810 | -1, |
1811 | s->control_pid, | |
1812 | false); | |
1813 | if (r < 0) | |
1814 | goto fail; | |
1815 | ||
1816 | if (r > 0) { | |
4c89c718 | 1817 | r = socket_arm_timer(s, usec_add(now(CLOCK_MONOTONIC), s->timeout_usec)); |
663996b3 MS |
1818 | if (r < 0) |
1819 | goto fail; | |
1820 | ||
1821 | socket_set_state(s, state); | |
60f067b4 JS |
1822 | } else if (state == SOCKET_STOP_PRE_SIGTERM) |
1823 | socket_enter_signal(s, SOCKET_STOP_PRE_SIGKILL, SOCKET_SUCCESS); | |
1824 | else if (state == SOCKET_STOP_PRE_SIGKILL) | |
663996b3 | 1825 | socket_enter_stop_post(s, SOCKET_SUCCESS); |
60f067b4 JS |
1826 | else if (state == SOCKET_FINAL_SIGTERM) |
1827 | socket_enter_signal(s, SOCKET_FINAL_SIGKILL, SOCKET_SUCCESS); | |
663996b3 MS |
1828 | else |
1829 | socket_enter_dead(s, SOCKET_SUCCESS); | |
1830 | ||
1831 | return; | |
1832 | ||
1833 | fail: | |
e3bff60a | 1834 | log_unit_warning_errno(UNIT(s), r, "Failed to kill processes: %m"); |
663996b3 MS |
1835 | |
1836 | if (state == SOCKET_STOP_PRE_SIGTERM || state == SOCKET_STOP_PRE_SIGKILL) | |
1837 | socket_enter_stop_post(s, SOCKET_FAILURE_RESOURCES); | |
1838 | else | |
1839 | socket_enter_dead(s, SOCKET_FAILURE_RESOURCES); | |
1840 | } | |
1841 | ||
1842 | static void socket_enter_stop_pre(Socket *s, SocketResult f) { | |
1843 | int r; | |
1844 | assert(s); | |
1845 | ||
1846 | if (f != SOCKET_SUCCESS) | |
1847 | s->result = f; | |
1848 | ||
1849 | socket_unwatch_control_pid(s); | |
663996b3 | 1850 | s->control_command_id = SOCKET_EXEC_STOP_PRE; |
60f067b4 | 1851 | s->control_command = s->exec_command[SOCKET_EXEC_STOP_PRE]; |
663996b3 | 1852 | |
60f067b4 JS |
1853 | if (s->control_command) { |
1854 | r = socket_spawn(s, s->control_command, &s->control_pid); | |
1855 | if (r < 0) | |
663996b3 MS |
1856 | goto fail; |
1857 | ||
1858 | socket_set_state(s, SOCKET_STOP_PRE); | |
1859 | } else | |
1860 | socket_enter_stop_post(s, SOCKET_SUCCESS); | |
1861 | ||
1862 | return; | |
1863 | ||
1864 | fail: | |
e3bff60a | 1865 | log_unit_warning_errno(UNIT(s), r, "Failed to run 'stop-pre' task: %m"); |
663996b3 MS |
1866 | socket_enter_stop_post(s, SOCKET_FAILURE_RESOURCES); |
1867 | } | |
1868 | ||
1869 | static void socket_enter_listening(Socket *s) { | |
1870 | int r; | |
1871 | assert(s); | |
1872 | ||
1873 | r = socket_watch_fds(s); | |
1874 | if (r < 0) { | |
e3bff60a | 1875 | log_unit_warning_errno(UNIT(s), r, "Failed to watch sockets: %m"); |
663996b3 MS |
1876 | goto fail; |
1877 | } | |
1878 | ||
1879 | socket_set_state(s, SOCKET_LISTENING); | |
1880 | return; | |
1881 | ||
1882 | fail: | |
1883 | socket_enter_stop_pre(s, SOCKET_FAILURE_RESOURCES); | |
1884 | } | |
1885 | ||
1886 | static void socket_enter_start_post(Socket *s) { | |
1887 | int r; | |
1888 | assert(s); | |
1889 | ||
60f067b4 JS |
1890 | socket_unwatch_control_pid(s); |
1891 | s->control_command_id = SOCKET_EXEC_START_POST; | |
1892 | s->control_command = s->exec_command[SOCKET_EXEC_START_POST]; | |
1893 | ||
1894 | if (s->control_command) { | |
1895 | r = socket_spawn(s, s->control_command, &s->control_pid); | |
1896 | if (r < 0) { | |
e3bff60a | 1897 | log_unit_warning_errno(UNIT(s), r, "Failed to run 'start-post' task: %m"); |
60f067b4 JS |
1898 | goto fail; |
1899 | } | |
1900 | ||
1901 | socket_set_state(s, SOCKET_START_POST); | |
1902 | } else | |
1903 | socket_enter_listening(s); | |
1904 | ||
1905 | return; | |
1906 | ||
1907 | fail: | |
1908 | socket_enter_stop_pre(s, SOCKET_FAILURE_RESOURCES); | |
1909 | } | |
1910 | ||
1911 | static void socket_enter_start_chown(Socket *s) { | |
1912 | int r; | |
1913 | ||
1914 | assert(s); | |
1915 | ||
663996b3 MS |
1916 | r = socket_open_fds(s); |
1917 | if (r < 0) { | |
e3bff60a | 1918 | log_unit_warning_errno(UNIT(s), r, "Failed to listen on sockets: %m"); |
663996b3 MS |
1919 | goto fail; |
1920 | } | |
1921 | ||
60f067b4 | 1922 | if (!isempty(s->user) || !isempty(s->group)) { |
663996b3 | 1923 | |
60f067b4 JS |
1924 | socket_unwatch_control_pid(s); |
1925 | s->control_command_id = SOCKET_EXEC_START_CHOWN; | |
1926 | s->control_command = NULL; | |
663996b3 | 1927 | |
60f067b4 | 1928 | r = socket_chown(s, &s->control_pid); |
663996b3 | 1929 | if (r < 0) { |
e3bff60a | 1930 | log_unit_warning_errno(UNIT(s), r, "Failed to fork 'start-chown' task: %m"); |
663996b3 MS |
1931 | goto fail; |
1932 | } | |
1933 | ||
60f067b4 | 1934 | socket_set_state(s, SOCKET_START_CHOWN); |
663996b3 | 1935 | } else |
60f067b4 | 1936 | socket_enter_start_post(s); |
663996b3 MS |
1937 | |
1938 | return; | |
1939 | ||
1940 | fail: | |
1941 | socket_enter_stop_pre(s, SOCKET_FAILURE_RESOURCES); | |
1942 | } | |
1943 | ||
1944 | static void socket_enter_start_pre(Socket *s) { | |
1945 | int r; | |
1946 | assert(s); | |
1947 | ||
1948 | socket_unwatch_control_pid(s); | |
663996b3 | 1949 | s->control_command_id = SOCKET_EXEC_START_PRE; |
60f067b4 | 1950 | s->control_command = s->exec_command[SOCKET_EXEC_START_PRE]; |
663996b3 | 1951 | |
60f067b4 JS |
1952 | if (s->control_command) { |
1953 | r = socket_spawn(s, s->control_command, &s->control_pid); | |
1954 | if (r < 0) { | |
e3bff60a | 1955 | log_unit_warning_errno(UNIT(s), r, "Failed to run 'start-pre' task: %m"); |
663996b3 | 1956 | goto fail; |
60f067b4 | 1957 | } |
663996b3 MS |
1958 | |
1959 | socket_set_state(s, SOCKET_START_PRE); | |
1960 | } else | |
60f067b4 | 1961 | socket_enter_start_chown(s); |
663996b3 MS |
1962 | |
1963 | return; | |
1964 | ||
1965 | fail: | |
663996b3 MS |
1966 | socket_enter_dead(s, SOCKET_FAILURE_RESOURCES); |
1967 | } | |
1968 | ||
aa27b158 MP |
1969 | static void flush_ports(Socket *s) { |
1970 | SocketPort *p; | |
1971 | ||
1972 | /* Flush all incoming traffic, regardless if actual bytes or new connections, so that this socket isn't busy | |
1973 | * anymore */ | |
1974 | ||
1975 | LIST_FOREACH(port, p, s->ports) { | |
1976 | if (p->fd < 0) | |
1977 | continue; | |
1978 | ||
1979 | (void) flush_accept(p->fd); | |
1980 | (void) flush_fd(p->fd); | |
1981 | } | |
1982 | } | |
1983 | ||
663996b3 | 1984 | static void socket_enter_running(Socket *s, int cfd) { |
4c89c718 | 1985 | _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL; |
663996b3 | 1986 | int r; |
663996b3 | 1987 | |
aa27b158 MP |
1988 | /* Note that this call takes possession of the connection fd passed. It either has to assign it somewhere or |
1989 | * close it. */ | |
1990 | ||
663996b3 | 1991 | assert(s); |
663996b3 | 1992 | |
aa27b158 | 1993 | /* We don't take connections anymore if we are supposed to shut down anyway */ |
663996b3 | 1994 | if (unit_stop_pending(UNIT(s))) { |
60f067b4 | 1995 | |
e3bff60a | 1996 | log_unit_debug(UNIT(s), "Suppressing connection request since unit stop is scheduled."); |
663996b3 MS |
1997 | |
1998 | if (cfd >= 0) | |
aa27b158 MP |
1999 | cfd = safe_close(cfd); |
2000 | else | |
2001 | flush_ports(s); | |
60f067b4 | 2002 | |
aa27b158 MP |
2003 | return; |
2004 | } | |
663996b3 | 2005 | |
aa27b158 MP |
2006 | if (!ratelimit_test(&s->trigger_limit)) { |
2007 | safe_close(cfd); | |
2008 | log_unit_warning(UNIT(s), "Trigger limit hit, refusing further activation."); | |
2009 | socket_enter_stop_pre(s, SOCKET_FAILURE_TRIGGER_LIMIT_HIT); | |
663996b3 MS |
2010 | return; |
2011 | } | |
2012 | ||
2013 | if (cfd < 0) { | |
2014 | Iterator i; | |
60f067b4 | 2015 | Unit *other; |
663996b3 MS |
2016 | bool pending = false; |
2017 | ||
2018 | /* If there's already a start pending don't bother to | |
2019 | * do anything */ | |
60f067b4 JS |
2020 | SET_FOREACH(other, UNIT(s)->dependencies[UNIT_TRIGGERS], i) |
2021 | if (unit_active_or_pending(other)) { | |
663996b3 MS |
2022 | pending = true; |
2023 | break; | |
2024 | } | |
2025 | ||
2026 | if (!pending) { | |
60f067b4 | 2027 | if (!UNIT_ISSET(s->service)) { |
e3bff60a | 2028 | log_unit_error(UNIT(s), "Service to activate vanished, refusing activation."); |
60f067b4 JS |
2029 | r = -ENOENT; |
2030 | goto fail; | |
2031 | } | |
2032 | ||
db2df898 | 2033 | r = manager_add_job(UNIT(s)->manager, JOB_START, UNIT_DEREF(s->service), JOB_REPLACE, &error, NULL); |
663996b3 MS |
2034 | if (r < 0) |
2035 | goto fail; | |
2036 | } | |
2037 | ||
2038 | socket_set_state(s, SOCKET_RUNNING); | |
2039 | } else { | |
60f067b4 | 2040 | _cleanup_free_ char *prefix = NULL, *instance = NULL, *name = NULL; |
663996b3 MS |
2041 | Service *service; |
2042 | ||
2043 | if (s->n_connections >= s->max_connections) { | |
aa27b158 | 2044 | log_unit_warning(UNIT(s), "Too many incoming connections (%u), refusing connection attempt.", s->n_connections); |
60f067b4 | 2045 | safe_close(cfd); |
663996b3 MS |
2046 | return; |
2047 | } | |
2048 | ||
2049 | r = socket_instantiate_service(s); | |
2050 | if (r < 0) | |
2051 | goto fail; | |
2052 | ||
2053 | r = instance_from_socket(cfd, s->n_accepted, &instance); | |
2054 | if (r < 0) { | |
2055 | if (r != -ENOTCONN) | |
2056 | goto fail; | |
2057 | ||
2058 | /* ENOTCONN is legitimate if TCP RST was received. | |
2059 | * This connection is over, but the socket unit lives on. */ | |
aa27b158 | 2060 | log_unit_debug(UNIT(s), "Got ENOTCONN on incoming socket, assuming aborted connection attempt, ignoring."); |
60f067b4 | 2061 | safe_close(cfd); |
663996b3 MS |
2062 | return; |
2063 | } | |
2064 | ||
e3bff60a MP |
2065 | r = unit_name_to_prefix(UNIT(s)->id, &prefix); |
2066 | if (r < 0) | |
663996b3 | 2067 | goto fail; |
663996b3 | 2068 | |
e3bff60a MP |
2069 | r = unit_name_build(prefix, instance, ".service", &name); |
2070 | if (r < 0) | |
663996b3 | 2071 | goto fail; |
663996b3 MS |
2072 | |
2073 | r = unit_add_name(UNIT_DEREF(s->service), name); | |
60f067b4 | 2074 | if (r < 0) |
663996b3 | 2075 | goto fail; |
663996b3 MS |
2076 | |
2077 | service = SERVICE(UNIT_DEREF(s->service)); | |
2078 | unit_ref_unset(&s->service); | |
663996b3 | 2079 | |
aa27b158 | 2080 | s->n_accepted++; |
663996b3 | 2081 | unit_choose_id(UNIT(service), name); |
663996b3 | 2082 | |
5eef597e | 2083 | r = service_set_socket_fd(service, cfd, s, s->selinux_context_from_net); |
663996b3 MS |
2084 | if (r < 0) |
2085 | goto fail; | |
2086 | ||
aa27b158 MP |
2087 | cfd = -1; /* We passed ownership of the fd to the service now. Forget it here. */ |
2088 | s->n_connections++; | |
663996b3 | 2089 | |
db2df898 | 2090 | r = manager_add_job(UNIT(s)->manager, JOB_START, UNIT(service), JOB_REPLACE, &error, NULL); |
aa27b158 MP |
2091 | if (r < 0) { |
2092 | /* We failed to activate the new service, but it still exists. Let's make sure the service | |
2093 | * closes and forgets the connection fd again, immediately. */ | |
2094 | service_close_socket_fd(service); | |
663996b3 | 2095 | goto fail; |
aa27b158 | 2096 | } |
663996b3 MS |
2097 | |
2098 | /* Notify clients about changed counters */ | |
2099 | unit_add_to_dbus_queue(UNIT(s)); | |
2100 | } | |
2101 | ||
2102 | return; | |
2103 | ||
2104 | fail: | |
e3bff60a MP |
2105 | log_unit_warning(UNIT(s), "Failed to queue service startup job (Maybe the service file is missing or not a %s unit?): %s", |
2106 | cfd >= 0 ? "template" : "non-template", | |
60f067b4 | 2107 | bus_error_message(&error, r)); |
663996b3 | 2108 | |
60f067b4 JS |
2109 | socket_enter_stop_pre(s, SOCKET_FAILURE_RESOURCES); |
2110 | safe_close(cfd); | |
663996b3 MS |
2111 | } |
2112 | ||
2113 | static void socket_run_next(Socket *s) { | |
2114 | int r; | |
2115 | ||
2116 | assert(s); | |
2117 | assert(s->control_command); | |
2118 | assert(s->control_command->command_next); | |
2119 | ||
2120 | socket_unwatch_control_pid(s); | |
2121 | ||
2122 | s->control_command = s->control_command->command_next; | |
2123 | ||
60f067b4 JS |
2124 | r = socket_spawn(s, s->control_command, &s->control_pid); |
2125 | if (r < 0) | |
663996b3 MS |
2126 | goto fail; |
2127 | ||
2128 | return; | |
2129 | ||
2130 | fail: | |
e3bff60a | 2131 | log_unit_warning_errno(UNIT(s), r, "Failed to run next task: %m"); |
663996b3 MS |
2132 | |
2133 | if (s->state == SOCKET_START_POST) | |
2134 | socket_enter_stop_pre(s, SOCKET_FAILURE_RESOURCES); | |
2135 | else if (s->state == SOCKET_STOP_POST) | |
2136 | socket_enter_dead(s, SOCKET_FAILURE_RESOURCES); | |
2137 | else | |
2138 | socket_enter_signal(s, SOCKET_FINAL_SIGTERM, SOCKET_FAILURE_RESOURCES); | |
2139 | } | |
2140 | ||
2141 | static int socket_start(Unit *u) { | |
2142 | Socket *s = SOCKET(u); | |
aa27b158 | 2143 | int r; |
663996b3 MS |
2144 | |
2145 | assert(s); | |
2146 | ||
2147 | /* We cannot fulfill this request right now, try again later | |
2148 | * please! */ | |
60f067b4 JS |
2149 | if (IN_SET(s->state, |
2150 | SOCKET_STOP_PRE, | |
2151 | SOCKET_STOP_PRE_SIGKILL, | |
2152 | SOCKET_STOP_PRE_SIGTERM, | |
2153 | SOCKET_STOP_POST, | |
2154 | SOCKET_FINAL_SIGTERM, | |
2155 | SOCKET_FINAL_SIGKILL)) | |
663996b3 MS |
2156 | return -EAGAIN; |
2157 | ||
60f067b4 JS |
2158 | /* Already on it! */ |
2159 | if (IN_SET(s->state, | |
2160 | SOCKET_START_PRE, | |
2161 | SOCKET_START_CHOWN, | |
2162 | SOCKET_START_POST)) | |
663996b3 MS |
2163 | return 0; |
2164 | ||
2165 | /* Cannot run this without the service being around */ | |
14228c0d | 2166 | if (UNIT_ISSET(s->service)) { |
663996b3 MS |
2167 | Service *service; |
2168 | ||
2169 | service = SERVICE(UNIT_DEREF(s->service)); | |
2170 | ||
2171 | if (UNIT(service)->load_state != UNIT_LOADED) { | |
e3bff60a | 2172 | log_unit_error(u, "Socket service %s not loaded, refusing.", UNIT(service)->id); |
663996b3 MS |
2173 | return -ENOENT; |
2174 | } | |
2175 | ||
2176 | /* If the service is already active we cannot start the | |
2177 | * socket */ | |
2178 | if (service->state != SERVICE_DEAD && | |
2179 | service->state != SERVICE_FAILED && | |
2180 | service->state != SERVICE_AUTO_RESTART) { | |
e3bff60a | 2181 | log_unit_error(u, "Socket service %s already active, refusing.", UNIT(service)->id); |
663996b3 MS |
2182 | return -EBUSY; |
2183 | } | |
663996b3 MS |
2184 | } |
2185 | ||
2186 | assert(s->state == SOCKET_DEAD || s->state == SOCKET_FAILED); | |
2187 | ||
aa27b158 MP |
2188 | r = unit_start_limit_test(u); |
2189 | if (r < 0) { | |
2190 | socket_enter_dead(s, SOCKET_FAILURE_START_LIMIT_HIT); | |
2191 | return r; | |
2192 | } | |
2193 | ||
663996b3 | 2194 | s->result = SOCKET_SUCCESS; |
e3bff60a MP |
2195 | s->reset_cpu_usage = true; |
2196 | ||
663996b3 | 2197 | socket_enter_start_pre(s); |
60f067b4 | 2198 | |
e735f4d4 | 2199 | return 1; |
663996b3 MS |
2200 | } |
2201 | ||
2202 | static int socket_stop(Unit *u) { | |
2203 | Socket *s = SOCKET(u); | |
2204 | ||
2205 | assert(s); | |
2206 | ||
2207 | /* Already on it */ | |
60f067b4 JS |
2208 | if (IN_SET(s->state, |
2209 | SOCKET_STOP_PRE, | |
2210 | SOCKET_STOP_PRE_SIGTERM, | |
2211 | SOCKET_STOP_PRE_SIGKILL, | |
2212 | SOCKET_STOP_POST, | |
2213 | SOCKET_FINAL_SIGTERM, | |
2214 | SOCKET_FINAL_SIGKILL)) | |
663996b3 MS |
2215 | return 0; |
2216 | ||
2217 | /* If there's already something running we go directly into | |
2218 | * kill mode. */ | |
60f067b4 JS |
2219 | if (IN_SET(s->state, |
2220 | SOCKET_START_PRE, | |
2221 | SOCKET_START_CHOWN, | |
2222 | SOCKET_START_POST)) { | |
663996b3 MS |
2223 | socket_enter_signal(s, SOCKET_STOP_PRE_SIGTERM, SOCKET_SUCCESS); |
2224 | return -EAGAIN; | |
2225 | } | |
2226 | ||
2227 | assert(s->state == SOCKET_LISTENING || s->state == SOCKET_RUNNING); | |
2228 | ||
2229 | socket_enter_stop_pre(s, SOCKET_SUCCESS); | |
e735f4d4 | 2230 | return 1; |
663996b3 MS |
2231 | } |
2232 | ||
2233 | static int socket_serialize(Unit *u, FILE *f, FDSet *fds) { | |
2234 | Socket *s = SOCKET(u); | |
2235 | SocketPort *p; | |
2236 | int r; | |
2237 | ||
2238 | assert(u); | |
2239 | assert(f); | |
2240 | assert(fds); | |
2241 | ||
2242 | unit_serialize_item(u, f, "state", socket_state_to_string(s->state)); | |
2243 | unit_serialize_item(u, f, "result", socket_result_to_string(s->result)); | |
2244 | unit_serialize_item_format(u, f, "n-accepted", "%u", s->n_accepted); | |
2245 | ||
2246 | if (s->control_pid > 0) | |
60f067b4 | 2247 | unit_serialize_item_format(u, f, "control-pid", PID_FMT, s->control_pid); |
663996b3 MS |
2248 | |
2249 | if (s->control_command_id >= 0) | |
2250 | unit_serialize_item(u, f, "control-command", socket_exec_command_to_string(s->control_command_id)); | |
2251 | ||
2252 | LIST_FOREACH(port, p, s->ports) { | |
2253 | int copy; | |
2254 | ||
2255 | if (p->fd < 0) | |
2256 | continue; | |
2257 | ||
60f067b4 JS |
2258 | copy = fdset_put_dup(fds, p->fd); |
2259 | if (copy < 0) | |
663996b3 MS |
2260 | return copy; |
2261 | ||
2262 | if (p->type == SOCKET_SOCKET) { | |
60f067b4 | 2263 | _cleanup_free_ char *t = NULL; |
663996b3 MS |
2264 | |
2265 | r = socket_address_print(&p->address, &t); | |
2266 | if (r < 0) | |
2267 | return r; | |
2268 | ||
2269 | if (socket_address_family(&p->address) == AF_NETLINK) | |
2270 | unit_serialize_item_format(u, f, "netlink", "%i %s", copy, t); | |
2271 | else | |
2272 | unit_serialize_item_format(u, f, "socket", "%i %i %s", copy, p->address.type, t); | |
60f067b4 | 2273 | |
663996b3 MS |
2274 | } else if (p->type == SOCKET_SPECIAL) |
2275 | unit_serialize_item_format(u, f, "special", "%i %s", copy, p->path); | |
2276 | else if (p->type == SOCKET_MQUEUE) | |
2277 | unit_serialize_item_format(u, f, "mqueue", "%i %s", copy, p->path); | |
6300502b MP |
2278 | else if (p->type == SOCKET_USB_FUNCTION) |
2279 | unit_serialize_item_format(u, f, "ffs", "%i %s", copy, p->path); | |
663996b3 MS |
2280 | else { |
2281 | assert(p->type == SOCKET_FIFO); | |
2282 | unit_serialize_item_format(u, f, "fifo", "%i %s", copy, p->path); | |
2283 | } | |
2284 | } | |
2285 | ||
663996b3 MS |
2286 | return 0; |
2287 | } | |
2288 | ||
2289 | static int socket_deserialize_item(Unit *u, const char *key, const char *value, FDSet *fds) { | |
2290 | Socket *s = SOCKET(u); | |
2291 | ||
2292 | assert(u); | |
2293 | assert(key); | |
2294 | assert(value); | |
663996b3 MS |
2295 | |
2296 | if (streq(key, "state")) { | |
2297 | SocketState state; | |
2298 | ||
2299 | state = socket_state_from_string(value); | |
2300 | if (state < 0) | |
e3bff60a | 2301 | log_unit_debug(u, "Failed to parse state value: %s", value); |
663996b3 MS |
2302 | else |
2303 | s->deserialized_state = state; | |
2304 | } else if (streq(key, "result")) { | |
2305 | SocketResult f; | |
2306 | ||
2307 | f = socket_result_from_string(value); | |
2308 | if (f < 0) | |
e3bff60a | 2309 | log_unit_debug(u, "Failed to parse result value: %s", value); |
663996b3 MS |
2310 | else if (f != SOCKET_SUCCESS) |
2311 | s->result = f; | |
2312 | ||
2313 | } else if (streq(key, "n-accepted")) { | |
2314 | unsigned k; | |
2315 | ||
2316 | if (safe_atou(value, &k) < 0) | |
e3bff60a | 2317 | log_unit_debug(u, "Failed to parse n-accepted value: %s", value); |
663996b3 MS |
2318 | else |
2319 | s->n_accepted += k; | |
2320 | } else if (streq(key, "control-pid")) { | |
2321 | pid_t pid; | |
2322 | ||
2323 | if (parse_pid(value, &pid) < 0) | |
e3bff60a | 2324 | log_unit_debug(u, "Failed to parse control-pid value: %s", value); |
663996b3 MS |
2325 | else |
2326 | s->control_pid = pid; | |
2327 | } else if (streq(key, "control-command")) { | |
2328 | SocketExecCommand id; | |
2329 | ||
2330 | id = socket_exec_command_from_string(value); | |
2331 | if (id < 0) | |
e3bff60a | 2332 | log_unit_debug(u, "Failed to parse exec-command value: %s", value); |
663996b3 MS |
2333 | else { |
2334 | s->control_command_id = id; | |
2335 | s->control_command = s->exec_command[id]; | |
2336 | } | |
2337 | } else if (streq(key, "fifo")) { | |
2338 | int fd, skip = 0; | |
2339 | SocketPort *p; | |
2340 | ||
2341 | if (sscanf(value, "%i %n", &fd, &skip) < 1 || fd < 0 || !fdset_contains(fds, fd)) | |
e3bff60a | 2342 | log_unit_debug(u, "Failed to parse fifo value: %s", value); |
663996b3 MS |
2343 | else { |
2344 | ||
2345 | LIST_FOREACH(port, p, s->ports) | |
2346 | if (p->type == SOCKET_FIFO && | |
e3bff60a | 2347 | path_equal_or_files_same(p->path, value+skip)) |
663996b3 MS |
2348 | break; |
2349 | ||
2350 | if (p) { | |
60f067b4 | 2351 | safe_close(p->fd); |
663996b3 MS |
2352 | p->fd = fdset_remove(fds, fd); |
2353 | } | |
2354 | } | |
2355 | ||
2356 | } else if (streq(key, "special")) { | |
2357 | int fd, skip = 0; | |
2358 | SocketPort *p; | |
2359 | ||
2360 | if (sscanf(value, "%i %n", &fd, &skip) < 1 || fd < 0 || !fdset_contains(fds, fd)) | |
e3bff60a | 2361 | log_unit_debug(u, "Failed to parse special value: %s", value); |
663996b3 MS |
2362 | else { |
2363 | ||
2364 | LIST_FOREACH(port, p, s->ports) | |
2365 | if (p->type == SOCKET_SPECIAL && | |
e3bff60a | 2366 | path_equal_or_files_same(p->path, value+skip)) |
663996b3 MS |
2367 | break; |
2368 | ||
2369 | if (p) { | |
60f067b4 | 2370 | safe_close(p->fd); |
663996b3 MS |
2371 | p->fd = fdset_remove(fds, fd); |
2372 | } | |
2373 | } | |
2374 | ||
2375 | } else if (streq(key, "mqueue")) { | |
2376 | int fd, skip = 0; | |
2377 | SocketPort *p; | |
2378 | ||
2379 | if (sscanf(value, "%i %n", &fd, &skip) < 1 || fd < 0 || !fdset_contains(fds, fd)) | |
e3bff60a | 2380 | log_unit_debug(u, "Failed to parse mqueue value: %s", value); |
663996b3 MS |
2381 | else { |
2382 | ||
2383 | LIST_FOREACH(port, p, s->ports) | |
2384 | if (p->type == SOCKET_MQUEUE && | |
e3bff60a | 2385 | streq(p->path, value+skip)) |
663996b3 MS |
2386 | break; |
2387 | ||
2388 | if (p) { | |
60f067b4 | 2389 | safe_close(p->fd); |
663996b3 MS |
2390 | p->fd = fdset_remove(fds, fd); |
2391 | } | |
2392 | } | |
2393 | ||
2394 | } else if (streq(key, "socket")) { | |
2395 | int fd, type, skip = 0; | |
2396 | SocketPort *p; | |
2397 | ||
2398 | if (sscanf(value, "%i %i %n", &fd, &type, &skip) < 2 || fd < 0 || type < 0 || !fdset_contains(fds, fd)) | |
e3bff60a | 2399 | log_unit_debug(u, "Failed to parse socket value: %s", value); |
663996b3 MS |
2400 | else { |
2401 | ||
2402 | LIST_FOREACH(port, p, s->ports) | |
2403 | if (socket_address_is(&p->address, value+skip, type)) | |
2404 | break; | |
2405 | ||
2406 | if (p) { | |
60f067b4 | 2407 | safe_close(p->fd); |
663996b3 MS |
2408 | p->fd = fdset_remove(fds, fd); |
2409 | } | |
2410 | } | |
2411 | ||
2412 | } else if (streq(key, "netlink")) { | |
2413 | int fd, skip = 0; | |
2414 | SocketPort *p; | |
2415 | ||
2416 | if (sscanf(value, "%i %n", &fd, &skip) < 1 || fd < 0 || !fdset_contains(fds, fd)) | |
e3bff60a | 2417 | log_unit_debug(u, "Failed to parse socket value: %s", value); |
663996b3 MS |
2418 | else { |
2419 | ||
2420 | LIST_FOREACH(port, p, s->ports) | |
2421 | if (socket_address_is_netlink(&p->address, value+skip)) | |
2422 | break; | |
2423 | ||
2424 | if (p) { | |
60f067b4 | 2425 | safe_close(p->fd); |
663996b3 MS |
2426 | p->fd = fdset_remove(fds, fd); |
2427 | } | |
2428 | } | |
6300502b MP |
2429 | |
2430 | } else if (streq(key, "ffs")) { | |
2431 | int fd, skip = 0; | |
2432 | SocketPort *p; | |
2433 | ||
2434 | if (sscanf(value, "%i %n", &fd, &skip) < 1 || fd < 0 || !fdset_contains(fds, fd)) | |
2435 | log_unit_debug(u, "Failed to parse ffs value: %s", value); | |
2436 | else { | |
2437 | ||
2438 | LIST_FOREACH(port, p, s->ports) | |
2439 | if (p->type == SOCKET_USB_FUNCTION && | |
2440 | path_equal_or_files_same(p->path, value+skip)) | |
2441 | break; | |
2442 | ||
2443 | if (p) { | |
2444 | safe_close(p->fd); | |
2445 | p->fd = fdset_remove(fds, fd); | |
2446 | } | |
2447 | } | |
2448 | ||
663996b3 | 2449 | } else |
e3bff60a | 2450 | log_unit_debug(UNIT(s), "Unknown serialization key: %s", key); |
663996b3 MS |
2451 | |
2452 | return 0; | |
2453 | } | |
2454 | ||
db2df898 | 2455 | static void socket_distribute_fds(Unit *u, FDSet *fds) { |
663996b3 MS |
2456 | Socket *s = SOCKET(u); |
2457 | SocketPort *p; | |
2458 | ||
2459 | assert(u); | |
2460 | ||
2461 | LIST_FOREACH(port, p, s->ports) { | |
2462 | Iterator i; | |
2463 | int fd; | |
2464 | ||
2465 | if (p->type != SOCKET_SOCKET) | |
2466 | continue; | |
2467 | ||
2468 | if (p->fd >= 0) | |
2469 | continue; | |
2470 | ||
2471 | FDSET_FOREACH(fd, fds, i) { | |
2472 | if (socket_address_matches_fd(&p->address, fd)) { | |
2473 | p->fd = fdset_remove(fds, fd); | |
2474 | s->deserialized_state = SOCKET_LISTENING; | |
2475 | break; | |
2476 | } | |
2477 | } | |
2478 | } | |
663996b3 MS |
2479 | } |
2480 | ||
2481 | _pure_ static UnitActiveState socket_active_state(Unit *u) { | |
2482 | assert(u); | |
2483 | ||
2484 | return state_translation_table[SOCKET(u)->state]; | |
2485 | } | |
2486 | ||
2487 | _pure_ static const char *socket_sub_state_to_string(Unit *u) { | |
2488 | assert(u); | |
2489 | ||
2490 | return socket_state_to_string(SOCKET(u)->state); | |
2491 | } | |
2492 | ||
2493 | const char* socket_port_type_to_string(SocketPort *p) { | |
2494 | ||
2495 | assert(p); | |
2496 | ||
2497 | switch (p->type) { | |
60f067b4 JS |
2498 | |
2499 | case SOCKET_SOCKET: | |
2500 | ||
2501 | switch (p->address.type) { | |
2502 | ||
2503 | case SOCK_STREAM: | |
2504 | return "Stream"; | |
2505 | ||
2506 | case SOCK_DGRAM: | |
2507 | return "Datagram"; | |
2508 | ||
2509 | case SOCK_SEQPACKET: | |
2510 | return "SequentialPacket"; | |
2511 | ||
2512 | case SOCK_RAW: | |
2513 | if (socket_address_family(&p->address) == AF_NETLINK) | |
2514 | return "Netlink"; | |
2515 | ||
2516 | default: | |
2517 | return NULL; | |
2518 | } | |
2519 | ||
2520 | case SOCKET_SPECIAL: | |
2521 | return "Special"; | |
2522 | ||
2523 | case SOCKET_MQUEUE: | |
2524 | return "MessageQueue"; | |
2525 | ||
2526 | case SOCKET_FIFO: | |
2527 | return "FIFO"; | |
2528 | ||
6300502b MP |
2529 | case SOCKET_USB_FUNCTION: |
2530 | return "USBFunction"; | |
2531 | ||
60f067b4 JS |
2532 | default: |
2533 | return NULL; | |
663996b3 MS |
2534 | } |
2535 | } | |
2536 | ||
2537 | _pure_ static bool socket_check_gc(Unit *u) { | |
2538 | Socket *s = SOCKET(u); | |
2539 | ||
2540 | assert(u); | |
2541 | ||
2542 | return s->n_connections > 0; | |
2543 | } | |
2544 | ||
60f067b4 JS |
2545 | static int socket_dispatch_io(sd_event_source *source, int fd, uint32_t revents, void *userdata) { |
2546 | SocketPort *p = userdata; | |
663996b3 MS |
2547 | int cfd = -1; |
2548 | ||
60f067b4 | 2549 | assert(p); |
663996b3 MS |
2550 | assert(fd >= 0); |
2551 | ||
60f067b4 JS |
2552 | if (p->socket->state != SOCKET_LISTENING) |
2553 | return 0; | |
663996b3 | 2554 | |
e3bff60a | 2555 | log_unit_debug(UNIT(p->socket), "Incoming traffic"); |
663996b3 | 2556 | |
60f067b4 | 2557 | if (revents != EPOLLIN) { |
663996b3 | 2558 | |
60f067b4 | 2559 | if (revents & EPOLLHUP) |
e3bff60a | 2560 | log_unit_error(UNIT(p->socket), "Got POLLHUP on a listening socket. The service probably invoked shutdown() on it, and should better not do that."); |
663996b3 | 2561 | else |
e3bff60a | 2562 | log_unit_error(UNIT(p->socket), "Got unexpected poll event (0x%x) on socket.", revents); |
663996b3 MS |
2563 | goto fail; |
2564 | } | |
2565 | ||
60f067b4 JS |
2566 | if (p->socket->accept && |
2567 | p->type == SOCKET_SOCKET && | |
2568 | socket_address_can_accept(&p->address)) { | |
2569 | ||
663996b3 MS |
2570 | for (;;) { |
2571 | ||
2572 | cfd = accept4(fd, NULL, NULL, SOCK_NONBLOCK); | |
2573 | if (cfd < 0) { | |
2574 | ||
2575 | if (errno == EINTR) | |
2576 | continue; | |
2577 | ||
e3bff60a | 2578 | log_unit_error_errno(UNIT(p->socket), errno, "Failed to accept socket: %m"); |
663996b3 MS |
2579 | goto fail; |
2580 | } | |
2581 | ||
2582 | break; | |
2583 | } | |
2584 | ||
60f067b4 | 2585 | socket_apply_socket_options(p->socket, cfd); |
663996b3 MS |
2586 | } |
2587 | ||
60f067b4 JS |
2588 | socket_enter_running(p->socket, cfd); |
2589 | return 0; | |
663996b3 MS |
2590 | |
2591 | fail: | |
60f067b4 JS |
2592 | socket_enter_stop_pre(p->socket, SOCKET_FAILURE_RESOURCES); |
2593 | return 0; | |
663996b3 MS |
2594 | } |
2595 | ||
2596 | static void socket_sigchld_event(Unit *u, pid_t pid, int code, int status) { | |
2597 | Socket *s = SOCKET(u); | |
2598 | SocketResult f; | |
2599 | ||
2600 | assert(s); | |
2601 | assert(pid >= 0); | |
2602 | ||
2603 | if (pid != s->control_pid) | |
2604 | return; | |
2605 | ||
2606 | s->control_pid = 0; | |
2607 | ||
2608 | if (is_clean_exit(code, status, NULL)) | |
2609 | f = SOCKET_SUCCESS; | |
2610 | else if (code == CLD_EXITED) | |
2611 | f = SOCKET_FAILURE_EXIT_CODE; | |
2612 | else if (code == CLD_KILLED) | |
2613 | f = SOCKET_FAILURE_SIGNAL; | |
2614 | else if (code == CLD_DUMPED) | |
2615 | f = SOCKET_FAILURE_CORE_DUMP; | |
2616 | else | |
60f067b4 | 2617 | assert_not_reached("Unknown sigchld code"); |
663996b3 MS |
2618 | |
2619 | if (s->control_command) { | |
2620 | exec_status_exit(&s->control_command->exec_status, &s->exec_context, pid, code, status); | |
2621 | ||
2622 | if (s->control_command->ignore) | |
2623 | f = SOCKET_SUCCESS; | |
2624 | } | |
2625 | ||
e3bff60a MP |
2626 | log_unit_full(u, f == SOCKET_SUCCESS ? LOG_DEBUG : LOG_NOTICE, 0, |
2627 | "Control process exited, code=%s status=%i", | |
2628 | sigchld_code_to_string(code), status); | |
663996b3 MS |
2629 | |
2630 | if (f != SOCKET_SUCCESS) | |
2631 | s->result = f; | |
2632 | ||
2633 | if (s->control_command && | |
2634 | s->control_command->command_next && | |
2635 | f == SOCKET_SUCCESS) { | |
2636 | ||
e3bff60a | 2637 | log_unit_debug(u, "Running next command for state %s", socket_state_to_string(s->state)); |
663996b3 MS |
2638 | socket_run_next(s); |
2639 | } else { | |
2640 | s->control_command = NULL; | |
2641 | s->control_command_id = _SOCKET_EXEC_COMMAND_INVALID; | |
2642 | ||
2643 | /* No further commands for this step, so let's figure | |
2644 | * out what to do next */ | |
2645 | ||
e3bff60a | 2646 | log_unit_debug(u, "Got final SIGCHLD for state %s", socket_state_to_string(s->state)); |
663996b3 MS |
2647 | |
2648 | switch (s->state) { | |
2649 | ||
2650 | case SOCKET_START_PRE: | |
2651 | if (f == SOCKET_SUCCESS) | |
60f067b4 | 2652 | socket_enter_start_chown(s); |
663996b3 MS |
2653 | else |
2654 | socket_enter_signal(s, SOCKET_FINAL_SIGTERM, f); | |
2655 | break; | |
2656 | ||
60f067b4 JS |
2657 | case SOCKET_START_CHOWN: |
2658 | if (f == SOCKET_SUCCESS) | |
2659 | socket_enter_start_post(s); | |
2660 | else | |
2661 | socket_enter_stop_pre(s, f); | |
2662 | break; | |
2663 | ||
663996b3 MS |
2664 | case SOCKET_START_POST: |
2665 | if (f == SOCKET_SUCCESS) | |
2666 | socket_enter_listening(s); | |
2667 | else | |
2668 | socket_enter_stop_pre(s, f); | |
2669 | break; | |
2670 | ||
2671 | case SOCKET_STOP_PRE: | |
2672 | case SOCKET_STOP_PRE_SIGTERM: | |
2673 | case SOCKET_STOP_PRE_SIGKILL: | |
2674 | socket_enter_stop_post(s, f); | |
2675 | break; | |
2676 | ||
2677 | case SOCKET_STOP_POST: | |
2678 | case SOCKET_FINAL_SIGTERM: | |
2679 | case SOCKET_FINAL_SIGKILL: | |
2680 | socket_enter_dead(s, f); | |
2681 | break; | |
2682 | ||
2683 | default: | |
2684 | assert_not_reached("Uh, control process died at wrong time."); | |
2685 | } | |
2686 | } | |
2687 | ||
2688 | /* Notify clients about changed exit status */ | |
2689 | unit_add_to_dbus_queue(u); | |
2690 | } | |
2691 | ||
60f067b4 JS |
2692 | static int socket_dispatch_timer(sd_event_source *source, usec_t usec, void *userdata) { |
2693 | Socket *s = SOCKET(userdata); | |
663996b3 MS |
2694 | |
2695 | assert(s); | |
60f067b4 | 2696 | assert(s->timer_event_source == source); |
663996b3 MS |
2697 | |
2698 | switch (s->state) { | |
2699 | ||
2700 | case SOCKET_START_PRE: | |
e3bff60a | 2701 | log_unit_warning(UNIT(s), "Starting timed out. Terminating."); |
663996b3 MS |
2702 | socket_enter_signal(s, SOCKET_FINAL_SIGTERM, SOCKET_FAILURE_TIMEOUT); |
2703 | break; | |
2704 | ||
60f067b4 | 2705 | case SOCKET_START_CHOWN: |
663996b3 | 2706 | case SOCKET_START_POST: |
e3bff60a | 2707 | log_unit_warning(UNIT(s), "Starting timed out. Stopping."); |
663996b3 MS |
2708 | socket_enter_stop_pre(s, SOCKET_FAILURE_TIMEOUT); |
2709 | break; | |
2710 | ||
2711 | case SOCKET_STOP_PRE: | |
e3bff60a | 2712 | log_unit_warning(UNIT(s), "Stopping timed out. Terminating."); |
663996b3 MS |
2713 | socket_enter_signal(s, SOCKET_STOP_PRE_SIGTERM, SOCKET_FAILURE_TIMEOUT); |
2714 | break; | |
2715 | ||
2716 | case SOCKET_STOP_PRE_SIGTERM: | |
2717 | if (s->kill_context.send_sigkill) { | |
e3bff60a | 2718 | log_unit_warning(UNIT(s), "Stopping timed out. Killing."); |
663996b3 MS |
2719 | socket_enter_signal(s, SOCKET_STOP_PRE_SIGKILL, SOCKET_FAILURE_TIMEOUT); |
2720 | } else { | |
e3bff60a | 2721 | log_unit_warning(UNIT(s), "Stopping timed out. Skipping SIGKILL. Ignoring."); |
663996b3 MS |
2722 | socket_enter_stop_post(s, SOCKET_FAILURE_TIMEOUT); |
2723 | } | |
2724 | break; | |
2725 | ||
2726 | case SOCKET_STOP_PRE_SIGKILL: | |
e3bff60a | 2727 | log_unit_warning(UNIT(s), "Processes still around after SIGKILL. Ignoring."); |
663996b3 MS |
2728 | socket_enter_stop_post(s, SOCKET_FAILURE_TIMEOUT); |
2729 | break; | |
2730 | ||
2731 | case SOCKET_STOP_POST: | |
e3bff60a | 2732 | log_unit_warning(UNIT(s), "Stopping timed out (2). Terminating."); |
663996b3 MS |
2733 | socket_enter_signal(s, SOCKET_FINAL_SIGTERM, SOCKET_FAILURE_TIMEOUT); |
2734 | break; | |
2735 | ||
2736 | case SOCKET_FINAL_SIGTERM: | |
2737 | if (s->kill_context.send_sigkill) { | |
e3bff60a | 2738 | log_unit_warning(UNIT(s), "Stopping timed out (2). Killing."); |
663996b3 MS |
2739 | socket_enter_signal(s, SOCKET_FINAL_SIGKILL, SOCKET_FAILURE_TIMEOUT); |
2740 | } else { | |
e3bff60a | 2741 | log_unit_warning(UNIT(s), "Stopping timed out (2). Skipping SIGKILL. Ignoring."); |
663996b3 MS |
2742 | socket_enter_dead(s, SOCKET_FAILURE_TIMEOUT); |
2743 | } | |
2744 | break; | |
2745 | ||
2746 | case SOCKET_FINAL_SIGKILL: | |
e3bff60a | 2747 | log_unit_warning(UNIT(s), "Still around after SIGKILL (2). Entering failed mode."); |
663996b3 MS |
2748 | socket_enter_dead(s, SOCKET_FAILURE_TIMEOUT); |
2749 | break; | |
2750 | ||
2751 | default: | |
2752 | assert_not_reached("Timeout at wrong time."); | |
2753 | } | |
60f067b4 JS |
2754 | |
2755 | return 0; | |
663996b3 MS |
2756 | } |
2757 | ||
6300502b MP |
2758 | int socket_collect_fds(Socket *s, int **fds) { |
2759 | int *rfds, k = 0, n = 0; | |
663996b3 MS |
2760 | SocketPort *p; |
2761 | ||
2762 | assert(s); | |
2763 | assert(fds); | |
663996b3 MS |
2764 | |
2765 | /* Called from the service code for requesting our fds */ | |
2766 | ||
6300502b | 2767 | LIST_FOREACH(port, p, s->ports) { |
663996b3 | 2768 | if (p->fd >= 0) |
6300502b MP |
2769 | n++; |
2770 | n += p->n_auxiliary_fds; | |
2771 | } | |
663996b3 | 2772 | |
6300502b | 2773 | if (n <= 0) { |
663996b3 | 2774 | *fds = NULL; |
663996b3 MS |
2775 | return 0; |
2776 | } | |
2777 | ||
6300502b | 2778 | rfds = new(int, n); |
e3bff60a | 2779 | if (!rfds) |
663996b3 MS |
2780 | return -ENOMEM; |
2781 | ||
6300502b MP |
2782 | LIST_FOREACH(port, p, s->ports) { |
2783 | int i; | |
2784 | ||
663996b3 MS |
2785 | if (p->fd >= 0) |
2786 | rfds[k++] = p->fd; | |
6300502b MP |
2787 | for (i = 0; i < p->n_auxiliary_fds; ++i) |
2788 | rfds[k++] = p->auxiliary_fds[i]; | |
2789 | } | |
663996b3 | 2790 | |
6300502b | 2791 | assert(k == n); |
663996b3 MS |
2792 | |
2793 | *fds = rfds; | |
6300502b | 2794 | return n; |
663996b3 MS |
2795 | } |
2796 | ||
60f067b4 JS |
2797 | static void socket_reset_failed(Unit *u) { |
2798 | Socket *s = SOCKET(u); | |
2799 | ||
2800 | assert(s); | |
2801 | ||
2802 | if (s->state == SOCKET_FAILED) | |
2803 | socket_set_state(s, SOCKET_DEAD); | |
2804 | ||
2805 | s->result = SOCKET_SUCCESS; | |
2806 | } | |
2807 | ||
663996b3 MS |
2808 | void socket_connection_unref(Socket *s) { |
2809 | assert(s); | |
2810 | ||
2811 | /* The service is dead. Yay! | |
2812 | * | |
2813 | * This is strictly for one-instance-per-connection | |
2814 | * services. */ | |
2815 | ||
2816 | assert(s->n_connections > 0); | |
2817 | s->n_connections--; | |
2818 | ||
e3bff60a | 2819 | log_unit_debug(UNIT(s), "One connection closed, %u left.", s->n_connections); |
663996b3 MS |
2820 | } |
2821 | ||
14228c0d MB |
2822 | static void socket_trigger_notify(Unit *u, Unit *other) { |
2823 | Socket *s = SOCKET(u); | |
14228c0d MB |
2824 | |
2825 | assert(u); | |
2826 | assert(other); | |
2827 | ||
aa27b158 MP |
2828 | /* Filter out invocations with bogus state */ |
2829 | if (other->load_state != UNIT_LOADED || other->type != UNIT_SERVICE) | |
2830 | return; | |
2831 | ||
2832 | /* Don't propagate state changes from the service if we are already down */ | |
2833 | if (!IN_SET(s->state, SOCKET_RUNNING, SOCKET_LISTENING)) | |
14228c0d MB |
2834 | return; |
2835 | ||
aa27b158 MP |
2836 | /* We don't care for the service state if we are in Accept=yes mode */ |
2837 | if (s->accept) | |
2838 | return; | |
2839 | ||
2840 | /* Propagate start limit hit state */ | |
4c89c718 MP |
2841 | if (other->start_limit_hit) { |
2842 | socket_enter_stop_pre(s, SOCKET_FAILURE_SERVICE_START_LIMIT_HIT); | |
14228c0d | 2843 | return; |
4c89c718 | 2844 | } |
14228c0d | 2845 | |
aa27b158 MP |
2846 | /* Don't propagate anything if there's still a job queued */ |
2847 | if (other->job) | |
4c89c718 | 2848 | return; |
14228c0d | 2849 | |
4c89c718 MP |
2850 | if (IN_SET(SERVICE(other)->state, |
2851 | SERVICE_DEAD, SERVICE_FAILED, | |
2852 | SERVICE_FINAL_SIGTERM, SERVICE_FINAL_SIGKILL, | |
2853 | SERVICE_AUTO_RESTART)) | |
2854 | socket_enter_listening(s); | |
14228c0d | 2855 | |
4c89c718 | 2856 | if (SERVICE(other)->state == SERVICE_RUNNING) |
14228c0d MB |
2857 | socket_set_state(s, SOCKET_RUNNING); |
2858 | } | |
2859 | ||
60f067b4 | 2860 | static int socket_kill(Unit *u, KillWho who, int signo, sd_bus_error *error) { |
663996b3 MS |
2861 | return unit_kill_common(u, who, signo, -1, SOCKET(u)->control_pid, error); |
2862 | } | |
2863 | ||
4c89c718 | 2864 | static int socket_get_timeout(Unit *u, usec_t *timeout) { |
60f067b4 | 2865 | Socket *s = SOCKET(u); |
4c89c718 | 2866 | usec_t t; |
60f067b4 JS |
2867 | int r; |
2868 | ||
2869 | if (!s->timer_event_source) | |
2870 | return 0; | |
2871 | ||
4c89c718 | 2872 | r = sd_event_source_get_time(s->timer_event_source, &t); |
60f067b4 JS |
2873 | if (r < 0) |
2874 | return r; | |
4c89c718 MP |
2875 | if (t == USEC_INFINITY) |
2876 | return 0; | |
60f067b4 | 2877 | |
4c89c718 | 2878 | *timeout = t; |
60f067b4 JS |
2879 | return 1; |
2880 | } | |
2881 | ||
6300502b MP |
2882 | char *socket_fdname(Socket *s) { |
2883 | assert(s); | |
663996b3 | 2884 | |
6300502b MP |
2885 | /* Returns the name to use for $LISTEN_NAMES. If the user |
2886 | * didn't specify anything specifically, use the socket unit's | |
2887 | * name as fallback. */ | |
2888 | ||
2889 | if (s->fdname) | |
2890 | return s->fdname; | |
2891 | ||
2892 | return UNIT(s)->id; | |
2893 | } | |
663996b3 | 2894 | |
aa27b158 MP |
2895 | static int socket_control_pid(Unit *u) { |
2896 | Socket *s = SOCKET(u); | |
2897 | ||
2898 | assert(s); | |
2899 | ||
2900 | return s->control_pid; | |
2901 | } | |
2902 | ||
663996b3 MS |
2903 | static const char* const socket_exec_command_table[_SOCKET_EXEC_COMMAND_MAX] = { |
2904 | [SOCKET_EXEC_START_PRE] = "StartPre", | |
60f067b4 | 2905 | [SOCKET_EXEC_START_CHOWN] = "StartChown", |
663996b3 MS |
2906 | [SOCKET_EXEC_START_POST] = "StartPost", |
2907 | [SOCKET_EXEC_STOP_PRE] = "StopPre", | |
2908 | [SOCKET_EXEC_STOP_POST] = "StopPost" | |
2909 | }; | |
2910 | ||
2911 | DEFINE_STRING_TABLE_LOOKUP(socket_exec_command, SocketExecCommand); | |
2912 | ||
2913 | static const char* const socket_result_table[_SOCKET_RESULT_MAX] = { | |
2914 | [SOCKET_SUCCESS] = "success", | |
2915 | [SOCKET_FAILURE_RESOURCES] = "resources", | |
2916 | [SOCKET_FAILURE_TIMEOUT] = "timeout", | |
2917 | [SOCKET_FAILURE_EXIT_CODE] = "exit-code", | |
2918 | [SOCKET_FAILURE_SIGNAL] = "signal", | |
2919 | [SOCKET_FAILURE_CORE_DUMP] = "core-dump", | |
aa27b158 MP |
2920 | [SOCKET_FAILURE_START_LIMIT_HIT] = "start-limit-hit", |
2921 | [SOCKET_FAILURE_TRIGGER_LIMIT_HIT] = "trigger-limit-hit", | |
4c89c718 | 2922 | [SOCKET_FAILURE_SERVICE_START_LIMIT_HIT] = "service-start-limit-hit" |
663996b3 MS |
2923 | }; |
2924 | ||
2925 | DEFINE_STRING_TABLE_LOOKUP(socket_result, SocketResult); | |
2926 | ||
2927 | const UnitVTable socket_vtable = { | |
2928 | .object_size = sizeof(Socket), | |
60f067b4 JS |
2929 | .exec_context_offset = offsetof(Socket, exec_context), |
2930 | .cgroup_context_offset = offsetof(Socket, cgroup_context), | |
2931 | .kill_context_offset = offsetof(Socket, kill_context), | |
2932 | .exec_runtime_offset = offsetof(Socket, exec_runtime), | |
663996b3 MS |
2933 | |
2934 | .sections = | |
2935 | "Unit\0" | |
2936 | "Socket\0" | |
2937 | "Install\0", | |
14228c0d | 2938 | .private_section = "Socket", |
663996b3 MS |
2939 | |
2940 | .init = socket_init, | |
2941 | .done = socket_done, | |
2942 | .load = socket_load, | |
2943 | ||
663996b3 MS |
2944 | .coldplug = socket_coldplug, |
2945 | ||
2946 | .dump = socket_dump, | |
2947 | ||
2948 | .start = socket_start, | |
2949 | .stop = socket_stop, | |
2950 | ||
60f067b4 JS |
2951 | .kill = socket_kill, |
2952 | ||
2953 | .get_timeout = socket_get_timeout, | |
2954 | ||
663996b3 MS |
2955 | .serialize = socket_serialize, |
2956 | .deserialize_item = socket_deserialize_item, | |
2957 | .distribute_fds = socket_distribute_fds, | |
2958 | ||
2959 | .active_state = socket_active_state, | |
2960 | .sub_state_to_string = socket_sub_state_to_string, | |
2961 | ||
2962 | .check_gc = socket_check_gc, | |
2963 | ||
663996b3 | 2964 | .sigchld_event = socket_sigchld_event, |
663996b3 | 2965 | |
14228c0d MB |
2966 | .trigger_notify = socket_trigger_notify, |
2967 | ||
663996b3 MS |
2968 | .reset_failed = socket_reset_failed, |
2969 | ||
aa27b158 MP |
2970 | .control_pid = socket_control_pid, |
2971 | ||
60f067b4 | 2972 | .bus_vtable = bus_socket_vtable, |
14228c0d MB |
2973 | .bus_set_property = bus_socket_set_property, |
2974 | .bus_commit_properties = bus_socket_commit_properties, | |
663996b3 MS |
2975 | |
2976 | .status_message_formats = { | |
2977 | /*.starting_stopping = { | |
2978 | [0] = "Starting socket %s...", | |
2979 | [1] = "Stopping socket %s...", | |
2980 | },*/ | |
2981 | .finished_start_job = { | |
2982 | [JOB_DONE] = "Listening on %s.", | |
2983 | [JOB_FAILED] = "Failed to listen on %s.", | |
663996b3 MS |
2984 | [JOB_TIMEOUT] = "Timed out starting %s.", |
2985 | }, | |
2986 | .finished_stop_job = { | |
2987 | [JOB_DONE] = "Closed %s.", | |
2988 | [JOB_FAILED] = "Failed stopping %s.", | |
2989 | [JOB_TIMEOUT] = "Timed out stopping %s.", | |
2990 | }, | |
2991 | }, | |
2992 | }; |