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1 | /* SPDX-License-Identifier: LGPL-2.1-or-later */ | |
2 | ||
3 | #include <arpa/inet.h> | |
4 | #include <errno.h> | |
5 | #include <fcntl.h> | |
6 | #include <mqueue.h> | |
7 | #include <netinet/tcp.h> | |
8 | #include <sys/epoll.h> | |
9 | #include <sys/stat.h> | |
10 | #include <unistd.h> | |
11 | #include <linux/sctp.h> | |
12 | ||
13 | #include "alloc-util.h" | |
14 | #include "bpf-firewall.h" | |
15 | #include "bus-error.h" | |
16 | #include "bus-util.h" | |
17 | #include "copy.h" | |
18 | #include "dbus-socket.h" | |
19 | #include "dbus-unit.h" | |
20 | #include "def.h" | |
21 | #include "errno-list.h" | |
22 | #include "exit-status.h" | |
23 | #include "fd-util.h" | |
24 | #include "format-util.h" | |
25 | #include "fs-util.h" | |
26 | #include "in-addr-util.h" | |
27 | #include "io-util.h" | |
28 | #include "ip-protocol-list.h" | |
29 | #include "label.h" | |
30 | #include "log.h" | |
31 | #include "mkdir.h" | |
32 | #include "parse-util.h" | |
33 | #include "path-util.h" | |
34 | #include "process-util.h" | |
35 | #include "selinux-util.h" | |
36 | #include "serialize.h" | |
37 | #include "signal-util.h" | |
38 | #include "smack-util.h" | |
39 | #include "socket.h" | |
40 | #include "socket-netlink.h" | |
41 | #include "special.h" | |
42 | #include "string-table.h" | |
43 | #include "string-util.h" | |
44 | #include "strv.h" | |
45 | #include "unit-name.h" | |
46 | #include "unit.h" | |
47 | #include "user-util.h" | |
48 | ||
49 | struct SocketPeer { | |
50 | unsigned n_ref; | |
51 | ||
52 | Socket *socket; | |
53 | union sockaddr_union peer; | |
54 | socklen_t peer_salen; | |
55 | }; | |
56 | ||
57 | static const UnitActiveState state_translation_table[_SOCKET_STATE_MAX] = { | |
58 | [SOCKET_DEAD] = UNIT_INACTIVE, | |
59 | [SOCKET_START_PRE] = UNIT_ACTIVATING, | |
60 | [SOCKET_START_CHOWN] = UNIT_ACTIVATING, | |
61 | [SOCKET_START_POST] = UNIT_ACTIVATING, | |
62 | [SOCKET_LISTENING] = UNIT_ACTIVE, | |
63 | [SOCKET_RUNNING] = UNIT_ACTIVE, | |
64 | [SOCKET_STOP_PRE] = UNIT_DEACTIVATING, | |
65 | [SOCKET_STOP_PRE_SIGTERM] = UNIT_DEACTIVATING, | |
66 | [SOCKET_STOP_PRE_SIGKILL] = UNIT_DEACTIVATING, | |
67 | [SOCKET_STOP_POST] = UNIT_DEACTIVATING, | |
68 | [SOCKET_FINAL_SIGTERM] = UNIT_DEACTIVATING, | |
69 | [SOCKET_FINAL_SIGKILL] = UNIT_DEACTIVATING, | |
70 | [SOCKET_FAILED] = UNIT_FAILED, | |
71 | [SOCKET_CLEANING] = UNIT_MAINTENANCE, | |
72 | }; | |
73 | ||
74 | static int socket_dispatch_io(sd_event_source *source, int fd, uint32_t revents, void *userdata); | |
75 | static int socket_dispatch_timer(sd_event_source *source, usec_t usec, void *userdata); | |
76 | static void flush_ports(Socket *s); | |
77 | ||
78 | static void socket_init(Unit *u) { | |
79 | Socket *s = SOCKET(u); | |
80 | ||
81 | assert(u); | |
82 | assert(u->load_state == UNIT_STUB); | |
83 | ||
84 | s->backlog = SOMAXCONN; | |
85 | s->timeout_usec = u->manager->default_timeout_start_usec; | |
86 | s->directory_mode = 0755; | |
87 | s->socket_mode = 0666; | |
88 | ||
89 | s->max_connections = 64; | |
90 | ||
91 | s->priority = -1; | |
92 | s->ip_tos = -1; | |
93 | s->ip_ttl = -1; | |
94 | s->mark = -1; | |
95 | ||
96 | s->exec_context.std_output = u->manager->default_std_output; | |
97 | s->exec_context.std_error = u->manager->default_std_error; | |
98 | ||
99 | s->control_command_id = _SOCKET_EXEC_COMMAND_INVALID; | |
100 | ||
101 | s->trigger_limit.interval = USEC_INFINITY; | |
102 | s->trigger_limit.burst = UINT_MAX; | |
103 | } | |
104 | ||
105 | static void socket_unwatch_control_pid(Socket *s) { | |
106 | assert(s); | |
107 | ||
108 | if (s->control_pid <= 0) | |
109 | return; | |
110 | ||
111 | unit_unwatch_pid(UNIT(s), s->control_pid); | |
112 | s->control_pid = 0; | |
113 | } | |
114 | ||
115 | static void socket_cleanup_fd_list(SocketPort *p) { | |
116 | assert(p); | |
117 | ||
118 | close_many(p->auxiliary_fds, p->n_auxiliary_fds); | |
119 | p->auxiliary_fds = mfree(p->auxiliary_fds); | |
120 | p->n_auxiliary_fds = 0; | |
121 | } | |
122 | ||
123 | void socket_free_ports(Socket *s) { | |
124 | SocketPort *p; | |
125 | ||
126 | assert(s); | |
127 | ||
128 | while ((p = s->ports)) { | |
129 | LIST_REMOVE(port, s->ports, p); | |
130 | ||
131 | sd_event_source_unref(p->event_source); | |
132 | ||
133 | socket_cleanup_fd_list(p); | |
134 | safe_close(p->fd); | |
135 | free(p->path); | |
136 | free(p); | |
137 | } | |
138 | } | |
139 | ||
140 | static void socket_done(Unit *u) { | |
141 | Socket *s = SOCKET(u); | |
142 | SocketPeer *p; | |
143 | ||
144 | assert(s); | |
145 | ||
146 | socket_free_ports(s); | |
147 | ||
148 | while ((p = set_steal_first(s->peers_by_address))) | |
149 | p->socket = NULL; | |
150 | ||
151 | s->peers_by_address = set_free(s->peers_by_address); | |
152 | ||
153 | s->exec_runtime = exec_runtime_unref(s->exec_runtime, false); | |
154 | exec_command_free_array(s->exec_command, _SOCKET_EXEC_COMMAND_MAX); | |
155 | s->control_command = NULL; | |
156 | ||
157 | dynamic_creds_unref(&s->dynamic_creds); | |
158 | ||
159 | socket_unwatch_control_pid(s); | |
160 | ||
161 | unit_ref_unset(&s->service); | |
162 | ||
163 | s->tcp_congestion = mfree(s->tcp_congestion); | |
164 | s->bind_to_device = mfree(s->bind_to_device); | |
165 | ||
166 | s->smack = mfree(s->smack); | |
167 | s->smack_ip_in = mfree(s->smack_ip_in); | |
168 | s->smack_ip_out = mfree(s->smack_ip_out); | |
169 | ||
170 | strv_free(s->symlinks); | |
171 | ||
172 | s->user = mfree(s->user); | |
173 | s->group = mfree(s->group); | |
174 | ||
175 | s->fdname = mfree(s->fdname); | |
176 | ||
177 | s->timer_event_source = sd_event_source_disable_unref(s->timer_event_source); | |
178 | } | |
179 | ||
180 | static int socket_arm_timer(Socket *s, usec_t usec) { | |
181 | int r; | |
182 | ||
183 | assert(s); | |
184 | ||
185 | if (s->timer_event_source) { | |
186 | r = sd_event_source_set_time(s->timer_event_source, usec); | |
187 | if (r < 0) | |
188 | return r; | |
189 | ||
190 | return sd_event_source_set_enabled(s->timer_event_source, SD_EVENT_ONESHOT); | |
191 | } | |
192 | ||
193 | if (usec == USEC_INFINITY) | |
194 | return 0; | |
195 | ||
196 | r = sd_event_add_time( | |
197 | UNIT(s)->manager->event, | |
198 | &s->timer_event_source, | |
199 | CLOCK_MONOTONIC, | |
200 | usec, 0, | |
201 | socket_dispatch_timer, s); | |
202 | if (r < 0) | |
203 | return r; | |
204 | ||
205 | (void) sd_event_source_set_description(s->timer_event_source, "socket-timer"); | |
206 | ||
207 | return 0; | |
208 | } | |
209 | ||
210 | static bool have_non_accept_socket(Socket *s) { | |
211 | SocketPort *p; | |
212 | ||
213 | assert(s); | |
214 | ||
215 | if (!s->accept) | |
216 | return true; | |
217 | ||
218 | LIST_FOREACH(port, p, s->ports) { | |
219 | ||
220 | if (p->type != SOCKET_SOCKET) | |
221 | return true; | |
222 | ||
223 | if (!socket_address_can_accept(&p->address)) | |
224 | return true; | |
225 | } | |
226 | ||
227 | return false; | |
228 | } | |
229 | ||
230 | static int socket_add_mount_dependencies(Socket *s) { | |
231 | SocketPort *p; | |
232 | int r; | |
233 | ||
234 | assert(s); | |
235 | ||
236 | LIST_FOREACH(port, p, s->ports) { | |
237 | const char *path = NULL; | |
238 | ||
239 | if (p->type == SOCKET_SOCKET) | |
240 | path = socket_address_get_path(&p->address); | |
241 | else if (IN_SET(p->type, SOCKET_FIFO, SOCKET_SPECIAL, SOCKET_USB_FUNCTION)) | |
242 | path = p->path; | |
243 | ||
244 | if (!path) | |
245 | continue; | |
246 | ||
247 | r = unit_require_mounts_for(UNIT(s), path, UNIT_DEPENDENCY_FILE); | |
248 | if (r < 0) | |
249 | return r; | |
250 | } | |
251 | ||
252 | return 0; | |
253 | } | |
254 | ||
255 | static int socket_add_device_dependencies(Socket *s) { | |
256 | char *t; | |
257 | ||
258 | assert(s); | |
259 | ||
260 | if (!s->bind_to_device || streq(s->bind_to_device, "lo")) | |
261 | return 0; | |
262 | ||
263 | t = strjoina("/sys/subsystem/net/devices/", s->bind_to_device); | |
264 | return unit_add_node_dependency(UNIT(s), t, UNIT_BINDS_TO, UNIT_DEPENDENCY_FILE); | |
265 | } | |
266 | ||
267 | static int socket_add_default_dependencies(Socket *s) { | |
268 | int r; | |
269 | assert(s); | |
270 | ||
271 | if (!UNIT(s)->default_dependencies) | |
272 | return 0; | |
273 | ||
274 | r = unit_add_dependency_by_name(UNIT(s), UNIT_BEFORE, SPECIAL_SOCKETS_TARGET, true, UNIT_DEPENDENCY_DEFAULT); | |
275 | if (r < 0) | |
276 | return r; | |
277 | ||
278 | if (MANAGER_IS_SYSTEM(UNIT(s)->manager)) { | |
279 | r = unit_add_two_dependencies_by_name(UNIT(s), UNIT_AFTER, UNIT_REQUIRES, SPECIAL_SYSINIT_TARGET, true, UNIT_DEPENDENCY_DEFAULT); | |
280 | if (r < 0) | |
281 | return r; | |
282 | } | |
283 | ||
284 | return unit_add_two_dependencies_by_name(UNIT(s), UNIT_BEFORE, UNIT_CONFLICTS, SPECIAL_SHUTDOWN_TARGET, true, UNIT_DEPENDENCY_DEFAULT); | |
285 | } | |
286 | ||
287 | _pure_ static bool socket_has_exec(Socket *s) { | |
288 | unsigned i; | |
289 | assert(s); | |
290 | ||
291 | for (i = 0; i < _SOCKET_EXEC_COMMAND_MAX; i++) | |
292 | if (s->exec_command[i]) | |
293 | return true; | |
294 | ||
295 | return false; | |
296 | } | |
297 | ||
298 | static int socket_add_extras(Socket *s) { | |
299 | Unit *u = UNIT(s); | |
300 | int r; | |
301 | ||
302 | assert(s); | |
303 | ||
304 | /* Pick defaults for the trigger limit, if nothing was explicitly configured. We pick a relatively high limit | |
305 | * in Accept=yes mode, and a lower limit for Accept=no. Reason: in Accept=yes mode we are invoking accept() | |
306 | * ourselves before the trigger limit can hit, thus incoming connections are taken off the socket queue quickly | |
307 | * and reliably. This is different for Accept=no, where the spawned service has to take the incoming traffic | |
308 | * off the queues, which it might not necessarily do. Moreover, while Accept=no services are supposed to | |
309 | * process whatever is queued in one go, and thus should normally never have to be started frequently. This is | |
310 | * different for Accept=yes where each connection is processed by a new service instance, and thus frequent | |
311 | * service starts are typical. */ | |
312 | ||
313 | if (s->trigger_limit.interval == USEC_INFINITY) | |
314 | s->trigger_limit.interval = 2 * USEC_PER_SEC; | |
315 | ||
316 | if (s->trigger_limit.burst == UINT_MAX) { | |
317 | if (s->accept) | |
318 | s->trigger_limit.burst = 200; | |
319 | else | |
320 | s->trigger_limit.burst = 20; | |
321 | } | |
322 | ||
323 | if (have_non_accept_socket(s)) { | |
324 | ||
325 | if (!UNIT_DEREF(s->service)) { | |
326 | Unit *x; | |
327 | ||
328 | r = unit_load_related_unit(u, ".service", &x); | |
329 | if (r < 0) | |
330 | return r; | |
331 | ||
332 | unit_ref_set(&s->service, u, x); | |
333 | } | |
334 | ||
335 | r = unit_add_two_dependencies(u, UNIT_BEFORE, UNIT_TRIGGERS, UNIT_DEREF(s->service), true, UNIT_DEPENDENCY_IMPLICIT); | |
336 | if (r < 0) | |
337 | return r; | |
338 | } | |
339 | ||
340 | r = socket_add_mount_dependencies(s); | |
341 | if (r < 0) | |
342 | return r; | |
343 | ||
344 | r = socket_add_device_dependencies(s); | |
345 | if (r < 0) | |
346 | return r; | |
347 | ||
348 | r = unit_patch_contexts(u); | |
349 | if (r < 0) | |
350 | return r; | |
351 | ||
352 | if (socket_has_exec(s)) { | |
353 | r = unit_add_exec_dependencies(u, &s->exec_context); | |
354 | if (r < 0) | |
355 | return r; | |
356 | } | |
357 | ||
358 | r = unit_set_default_slice(u); | |
359 | if (r < 0) | |
360 | return r; | |
361 | ||
362 | r = socket_add_default_dependencies(s); | |
363 | if (r < 0) | |
364 | return r; | |
365 | ||
366 | return 0; | |
367 | } | |
368 | ||
369 | static const char *socket_find_symlink_target(Socket *s) { | |
370 | const char *found = NULL; | |
371 | SocketPort *p; | |
372 | ||
373 | LIST_FOREACH(port, p, s->ports) { | |
374 | const char *f = NULL; | |
375 | ||
376 | switch (p->type) { | |
377 | ||
378 | case SOCKET_FIFO: | |
379 | f = p->path; | |
380 | break; | |
381 | ||
382 | case SOCKET_SOCKET: | |
383 | f = socket_address_get_path(&p->address); | |
384 | break; | |
385 | ||
386 | default: | |
387 | break; | |
388 | } | |
389 | ||
390 | if (f) { | |
391 | if (found) | |
392 | return NULL; | |
393 | ||
394 | found = f; | |
395 | } | |
396 | } | |
397 | ||
398 | return found; | |
399 | } | |
400 | ||
401 | static int socket_verify(Socket *s) { | |
402 | assert(s); | |
403 | assert(UNIT(s)->load_state == UNIT_LOADED); | |
404 | ||
405 | if (!s->ports) | |
406 | return log_unit_error_errno(UNIT(s), SYNTHETIC_ERRNO(ENOEXEC), "Unit has no Listen setting (ListenStream=, ListenDatagram=, ListenFIFO=, ...). Refusing."); | |
407 | ||
408 | if (s->accept && have_non_accept_socket(s)) | |
409 | return log_unit_error_errno(UNIT(s), SYNTHETIC_ERRNO(ENOEXEC), "Unit configured for accepting sockets, but sockets are non-accepting. Refusing."); | |
410 | ||
411 | if (s->accept && s->max_connections <= 0) | |
412 | return log_unit_error_errno(UNIT(s), SYNTHETIC_ERRNO(ENOEXEC), "MaxConnection= setting too small. Refusing."); | |
413 | ||
414 | if (s->accept && UNIT_DEREF(s->service)) | |
415 | return log_unit_error_errno(UNIT(s), SYNTHETIC_ERRNO(ENOEXEC), "Explicit service configuration for accepting socket units not supported. Refusing."); | |
416 | ||
417 | if (s->exec_context.pam_name && s->kill_context.kill_mode != KILL_CONTROL_GROUP) | |
418 | return log_unit_error_errno(UNIT(s), SYNTHETIC_ERRNO(ENOEXEC), "Unit has PAM enabled. Kill mode must be set to 'control-group'. Refusing."); | |
419 | ||
420 | if (!strv_isempty(s->symlinks) && !socket_find_symlink_target(s)) | |
421 | return log_unit_error_errno(UNIT(s), SYNTHETIC_ERRNO(ENOEXEC), "Unit has symlinks set but none or more than one node in the file system. Refusing."); | |
422 | ||
423 | return 0; | |
424 | } | |
425 | ||
426 | static void peer_address_hash_func(const SocketPeer *s, struct siphash *state) { | |
427 | assert(s); | |
428 | ||
429 | if (s->peer.sa.sa_family == AF_INET) | |
430 | siphash24_compress(&s->peer.in.sin_addr, sizeof(s->peer.in.sin_addr), state); | |
431 | else if (s->peer.sa.sa_family == AF_INET6) | |
432 | siphash24_compress(&s->peer.in6.sin6_addr, sizeof(s->peer.in6.sin6_addr), state); | |
433 | else if (s->peer.sa.sa_family == AF_VSOCK) | |
434 | siphash24_compress(&s->peer.vm.svm_cid, sizeof(s->peer.vm.svm_cid), state); | |
435 | else | |
436 | assert_not_reached("Unknown address family."); | |
437 | } | |
438 | ||
439 | static int peer_address_compare_func(const SocketPeer *x, const SocketPeer *y) { | |
440 | int r; | |
441 | ||
442 | r = CMP(x->peer.sa.sa_family, y->peer.sa.sa_family); | |
443 | if (r != 0) | |
444 | return r; | |
445 | ||
446 | switch(x->peer.sa.sa_family) { | |
447 | case AF_INET: | |
448 | return memcmp(&x->peer.in.sin_addr, &y->peer.in.sin_addr, sizeof(x->peer.in.sin_addr)); | |
449 | case AF_INET6: | |
450 | return memcmp(&x->peer.in6.sin6_addr, &y->peer.in6.sin6_addr, sizeof(x->peer.in6.sin6_addr)); | |
451 | case AF_VSOCK: | |
452 | return CMP(x->peer.vm.svm_cid, y->peer.vm.svm_cid); | |
453 | } | |
454 | assert_not_reached("Black sheep in the family!"); | |
455 | } | |
456 | ||
457 | DEFINE_PRIVATE_HASH_OPS(peer_address_hash_ops, SocketPeer, peer_address_hash_func, peer_address_compare_func); | |
458 | ||
459 | static int socket_load(Unit *u) { | |
460 | Socket *s = SOCKET(u); | |
461 | int r; | |
462 | ||
463 | assert(u); | |
464 | assert(u->load_state == UNIT_STUB); | |
465 | ||
466 | r = set_ensure_allocated(&s->peers_by_address, &peer_address_hash_ops); | |
467 | if (r < 0) | |
468 | return r; | |
469 | ||
470 | r = unit_load_fragment_and_dropin(u, true); | |
471 | if (r < 0) | |
472 | return r; | |
473 | ||
474 | if (u->load_state != UNIT_LOADED) | |
475 | return 0; | |
476 | ||
477 | /* This is a new unit? Then let's add in some extras */ | |
478 | r = socket_add_extras(s); | |
479 | if (r < 0) | |
480 | return r; | |
481 | ||
482 | return socket_verify(s); | |
483 | } | |
484 | ||
485 | static SocketPeer *socket_peer_new(void) { | |
486 | SocketPeer *p; | |
487 | ||
488 | p = new0(SocketPeer, 1); | |
489 | if (!p) | |
490 | return NULL; | |
491 | ||
492 | p->n_ref = 1; | |
493 | ||
494 | return p; | |
495 | } | |
496 | ||
497 | static SocketPeer *socket_peer_free(SocketPeer *p) { | |
498 | assert(p); | |
499 | ||
500 | if (p->socket) | |
501 | set_remove(p->socket->peers_by_address, p); | |
502 | ||
503 | return mfree(p); | |
504 | } | |
505 | ||
506 | DEFINE_TRIVIAL_REF_UNREF_FUNC(SocketPeer, socket_peer, socket_peer_free); | |
507 | ||
508 | int socket_acquire_peer(Socket *s, int fd, SocketPeer **p) { | |
509 | _cleanup_(socket_peer_unrefp) SocketPeer *remote = NULL; | |
510 | SocketPeer sa = {}, *i; | |
511 | socklen_t salen = sizeof(sa.peer); | |
512 | int r; | |
513 | ||
514 | assert(fd >= 0); | |
515 | assert(s); | |
516 | ||
517 | if (getpeername(fd, &sa.peer.sa, &salen) < 0) | |
518 | return log_unit_error_errno(UNIT(s), errno, "getpeername failed: %m"); | |
519 | ||
520 | if (!IN_SET(sa.peer.sa.sa_family, AF_INET, AF_INET6, AF_VSOCK)) { | |
521 | *p = NULL; | |
522 | return 0; | |
523 | } | |
524 | ||
525 | i = set_get(s->peers_by_address, &sa); | |
526 | if (i) { | |
527 | *p = socket_peer_ref(i); | |
528 | return 1; | |
529 | } | |
530 | ||
531 | remote = socket_peer_new(); | |
532 | if (!remote) | |
533 | return log_oom(); | |
534 | ||
535 | remote->peer = sa.peer; | |
536 | remote->peer_salen = salen; | |
537 | ||
538 | r = set_put(s->peers_by_address, remote); | |
539 | if (r < 0) | |
540 | return r; | |
541 | ||
542 | remote->socket = s; | |
543 | ||
544 | *p = TAKE_PTR(remote); | |
545 | ||
546 | return 1; | |
547 | } | |
548 | ||
549 | _const_ static const char* listen_lookup(int family, int type) { | |
550 | ||
551 | if (family == AF_NETLINK) | |
552 | return "ListenNetlink"; | |
553 | ||
554 | if (type == SOCK_STREAM) | |
555 | return "ListenStream"; | |
556 | else if (type == SOCK_DGRAM) | |
557 | return "ListenDatagram"; | |
558 | else if (type == SOCK_SEQPACKET) | |
559 | return "ListenSequentialPacket"; | |
560 | ||
561 | assert_not_reached("Unknown socket type"); | |
562 | return NULL; | |
563 | } | |
564 | ||
565 | static void socket_dump(Unit *u, FILE *f, const char *prefix) { | |
566 | SocketExecCommand c; | |
567 | Socket *s = SOCKET(u); | |
568 | SocketPort *p; | |
569 | const char *prefix2, *str; | |
570 | ||
571 | assert(s); | |
572 | assert(f); | |
573 | ||
574 | prefix = strempty(prefix); | |
575 | prefix2 = strjoina(prefix, "\t"); | |
576 | ||
577 | fprintf(f, | |
578 | "%sSocket State: %s\n" | |
579 | "%sResult: %s\n" | |
580 | "%sClean Result: %s\n" | |
581 | "%sBindIPv6Only: %s\n" | |
582 | "%sBacklog: %u\n" | |
583 | "%sSocketMode: %04o\n" | |
584 | "%sDirectoryMode: %04o\n" | |
585 | "%sKeepAlive: %s\n" | |
586 | "%sNoDelay: %s\n" | |
587 | "%sFreeBind: %s\n" | |
588 | "%sTransparent: %s\n" | |
589 | "%sBroadcast: %s\n" | |
590 | "%sPassCredentials: %s\n" | |
591 | "%sPassSecurity: %s\n" | |
592 | "%sPassPacketInfo: %s\n" | |
593 | "%sTCPCongestion: %s\n" | |
594 | "%sRemoveOnStop: %s\n" | |
595 | "%sWritable: %s\n" | |
596 | "%sFileDescriptorName: %s\n" | |
597 | "%sSELinuxContextFromNet: %s\n", | |
598 | prefix, socket_state_to_string(s->state), | |
599 | prefix, socket_result_to_string(s->result), | |
600 | prefix, socket_result_to_string(s->clean_result), | |
601 | prefix, socket_address_bind_ipv6_only_to_string(s->bind_ipv6_only), | |
602 | prefix, s->backlog, | |
603 | prefix, s->socket_mode, | |
604 | prefix, s->directory_mode, | |
605 | prefix, yes_no(s->keep_alive), | |
606 | prefix, yes_no(s->no_delay), | |
607 | prefix, yes_no(s->free_bind), | |
608 | prefix, yes_no(s->transparent), | |
609 | prefix, yes_no(s->broadcast), | |
610 | prefix, yes_no(s->pass_cred), | |
611 | prefix, yes_no(s->pass_sec), | |
612 | prefix, yes_no(s->pass_pktinfo), | |
613 | prefix, strna(s->tcp_congestion), | |
614 | prefix, yes_no(s->remove_on_stop), | |
615 | prefix, yes_no(s->writable), | |
616 | prefix, socket_fdname(s), | |
617 | prefix, yes_no(s->selinux_context_from_net)); | |
618 | ||
619 | if (s->timestamping != SOCKET_TIMESTAMPING_OFF) | |
620 | fprintf(f, | |
621 | "%sTimestamping: %s\n", | |
622 | prefix, socket_timestamping_to_string(s->timestamping)); | |
623 | ||
624 | if (s->control_pid > 0) | |
625 | fprintf(f, | |
626 | "%sControl PID: "PID_FMT"\n", | |
627 | prefix, s->control_pid); | |
628 | ||
629 | if (s->bind_to_device) | |
630 | fprintf(f, | |
631 | "%sBindToDevice: %s\n", | |
632 | prefix, s->bind_to_device); | |
633 | ||
634 | if (s->accept) | |
635 | fprintf(f, | |
636 | "%sAccepted: %u\n" | |
637 | "%sNConnections: %u\n" | |
638 | "%sMaxConnections: %u\n" | |
639 | "%sMaxConnectionsPerSource: %u\n", | |
640 | prefix, s->n_accepted, | |
641 | prefix, s->n_connections, | |
642 | prefix, s->max_connections, | |
643 | prefix, s->max_connections_per_source); | |
644 | else | |
645 | fprintf(f, | |
646 | "%sFlushPending: %s\n", | |
647 | prefix, yes_no(s->flush_pending)); | |
648 | ||
649 | ||
650 | if (s->priority >= 0) | |
651 | fprintf(f, | |
652 | "%sPriority: %i\n", | |
653 | prefix, s->priority); | |
654 | ||
655 | if (s->receive_buffer > 0) | |
656 | fprintf(f, | |
657 | "%sReceiveBuffer: %zu\n", | |
658 | prefix, s->receive_buffer); | |
659 | ||
660 | if (s->send_buffer > 0) | |
661 | fprintf(f, | |
662 | "%sSendBuffer: %zu\n", | |
663 | prefix, s->send_buffer); | |
664 | ||
665 | if (s->ip_tos >= 0) | |
666 | fprintf(f, | |
667 | "%sIPTOS: %i\n", | |
668 | prefix, s->ip_tos); | |
669 | ||
670 | if (s->ip_ttl >= 0) | |
671 | fprintf(f, | |
672 | "%sIPTTL: %i\n", | |
673 | prefix, s->ip_ttl); | |
674 | ||
675 | if (s->pipe_size > 0) | |
676 | fprintf(f, | |
677 | "%sPipeSize: %zu\n", | |
678 | prefix, s->pipe_size); | |
679 | ||
680 | if (s->mark >= 0) | |
681 | fprintf(f, | |
682 | "%sMark: %i\n", | |
683 | prefix, s->mark); | |
684 | ||
685 | if (s->mq_maxmsg > 0) | |
686 | fprintf(f, | |
687 | "%sMessageQueueMaxMessages: %li\n", | |
688 | prefix, s->mq_maxmsg); | |
689 | ||
690 | if (s->mq_msgsize > 0) | |
691 | fprintf(f, | |
692 | "%sMessageQueueMessageSize: %li\n", | |
693 | prefix, s->mq_msgsize); | |
694 | ||
695 | if (s->reuse_port) | |
696 | fprintf(f, | |
697 | "%sReusePort: %s\n", | |
698 | prefix, yes_no(s->reuse_port)); | |
699 | ||
700 | if (s->smack) | |
701 | fprintf(f, | |
702 | "%sSmackLabel: %s\n", | |
703 | prefix, s->smack); | |
704 | ||
705 | if (s->smack_ip_in) | |
706 | fprintf(f, | |
707 | "%sSmackLabelIPIn: %s\n", | |
708 | prefix, s->smack_ip_in); | |
709 | ||
710 | if (s->smack_ip_out) | |
711 | fprintf(f, | |
712 | "%sSmackLabelIPOut: %s\n", | |
713 | prefix, s->smack_ip_out); | |
714 | ||
715 | if (!isempty(s->user) || !isempty(s->group)) | |
716 | fprintf(f, | |
717 | "%sSocketUser: %s\n" | |
718 | "%sSocketGroup: %s\n", | |
719 | prefix, strna(s->user), | |
720 | prefix, strna(s->group)); | |
721 | ||
722 | if (s->keep_alive_time > 0) | |
723 | fprintf(f, | |
724 | "%sKeepAliveTimeSec: %s\n", | |
725 | prefix, FORMAT_TIMESPAN(s->keep_alive_time, USEC_PER_SEC)); | |
726 | ||
727 | if (s->keep_alive_interval > 0) | |
728 | fprintf(f, | |
729 | "%sKeepAliveIntervalSec: %s\n", | |
730 | prefix, FORMAT_TIMESPAN(s->keep_alive_interval, USEC_PER_SEC)); | |
731 | ||
732 | if (s->keep_alive_cnt > 0) | |
733 | fprintf(f, | |
734 | "%sKeepAliveProbes: %u\n", | |
735 | prefix, s->keep_alive_cnt); | |
736 | ||
737 | if (s->defer_accept > 0) | |
738 | fprintf(f, | |
739 | "%sDeferAcceptSec: %s\n", | |
740 | prefix, FORMAT_TIMESPAN(s->defer_accept, USEC_PER_SEC)); | |
741 | ||
742 | LIST_FOREACH(port, p, s->ports) { | |
743 | ||
744 | switch (p->type) { | |
745 | case SOCKET_SOCKET: { | |
746 | _cleanup_free_ char *k = NULL; | |
747 | const char *t; | |
748 | int r; | |
749 | ||
750 | r = socket_address_print(&p->address, &k); | |
751 | if (r < 0) | |
752 | t = strerror_safe(r); | |
753 | else | |
754 | t = k; | |
755 | ||
756 | fprintf(f, "%s%s: %s\n", prefix, listen_lookup(socket_address_family(&p->address), p->address.type), t); | |
757 | break; | |
758 | } | |
759 | case SOCKET_SPECIAL: | |
760 | fprintf(f, "%sListenSpecial: %s\n", prefix, p->path); | |
761 | break; | |
762 | case SOCKET_USB_FUNCTION: | |
763 | fprintf(f, "%sListenUSBFunction: %s\n", prefix, p->path); | |
764 | break; | |
765 | case SOCKET_MQUEUE: | |
766 | fprintf(f, "%sListenMessageQueue: %s\n", prefix, p->path); | |
767 | break; | |
768 | default: | |
769 | fprintf(f, "%sListenFIFO: %s\n", prefix, p->path); | |
770 | } | |
771 | } | |
772 | ||
773 | fprintf(f, | |
774 | "%sTriggerLimitIntervalSec: %s\n" | |
775 | "%sTriggerLimitBurst: %u\n", | |
776 | prefix, FORMAT_TIMESPAN(s->trigger_limit.interval, USEC_PER_SEC), | |
777 | prefix, s->trigger_limit.burst); | |
778 | ||
779 | str = ip_protocol_to_name(s->socket_protocol); | |
780 | if (str) | |
781 | fprintf(f, "%sSocketProtocol: %s\n", prefix, str); | |
782 | ||
783 | if (!strv_isempty(s->symlinks)) { | |
784 | char **q; | |
785 | ||
786 | fprintf(f, "%sSymlinks:", prefix); | |
787 | STRV_FOREACH(q, s->symlinks) | |
788 | fprintf(f, " %s", *q); | |
789 | ||
790 | fprintf(f, "\n"); | |
791 | } | |
792 | ||
793 | fprintf(f, | |
794 | "%sTimeoutSec: %s\n", | |
795 | prefix, FORMAT_TIMESPAN(s->timeout_usec, USEC_PER_SEC)); | |
796 | ||
797 | exec_context_dump(&s->exec_context, f, prefix); | |
798 | kill_context_dump(&s->kill_context, f, prefix); | |
799 | ||
800 | for (c = 0; c < _SOCKET_EXEC_COMMAND_MAX; c++) { | |
801 | if (!s->exec_command[c]) | |
802 | continue; | |
803 | ||
804 | fprintf(f, "%s-> %s:\n", | |
805 | prefix, socket_exec_command_to_string(c)); | |
806 | ||
807 | exec_command_dump_list(s->exec_command[c], f, prefix2); | |
808 | } | |
809 | ||
810 | cgroup_context_dump(UNIT(s), f, prefix); | |
811 | } | |
812 | ||
813 | static int instance_from_socket(int fd, unsigned nr, char **instance) { | |
814 | socklen_t l; | |
815 | char *r; | |
816 | union sockaddr_union local, remote; | |
817 | ||
818 | assert(fd >= 0); | |
819 | assert(instance); | |
820 | ||
821 | l = sizeof(local); | |
822 | if (getsockname(fd, &local.sa, &l) < 0) | |
823 | return -errno; | |
824 | ||
825 | l = sizeof(remote); | |
826 | if (getpeername(fd, &remote.sa, &l) < 0) | |
827 | return -errno; | |
828 | ||
829 | switch (local.sa.sa_family) { | |
830 | ||
831 | case AF_INET: { | |
832 | uint32_t | |
833 | a = be32toh(local.in.sin_addr.s_addr), | |
834 | b = be32toh(remote.in.sin_addr.s_addr); | |
835 | ||
836 | if (asprintf(&r, | |
837 | "%u-%u.%u.%u.%u:%u-%u.%u.%u.%u:%u", | |
838 | nr, | |
839 | a >> 24, (a >> 16) & 0xFF, (a >> 8) & 0xFF, a & 0xFF, | |
840 | be16toh(local.in.sin_port), | |
841 | b >> 24, (b >> 16) & 0xFF, (b >> 8) & 0xFF, b & 0xFF, | |
842 | be16toh(remote.in.sin_port)) < 0) | |
843 | return -ENOMEM; | |
844 | ||
845 | break; | |
846 | } | |
847 | ||
848 | case AF_INET6: { | |
849 | static const unsigned char ipv4_prefix[] = { | |
850 | 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0xFF, 0xFF | |
851 | }; | |
852 | ||
853 | if (memcmp(&local.in6.sin6_addr, ipv4_prefix, sizeof(ipv4_prefix)) == 0 && | |
854 | memcmp(&remote.in6.sin6_addr, ipv4_prefix, sizeof(ipv4_prefix)) == 0) { | |
855 | const uint8_t | |
856 | *a = local.in6.sin6_addr.s6_addr+12, | |
857 | *b = remote.in6.sin6_addr.s6_addr+12; | |
858 | ||
859 | if (asprintf(&r, | |
860 | "%u-%u.%u.%u.%u:%u-%u.%u.%u.%u:%u", | |
861 | nr, | |
862 | a[0], a[1], a[2], a[3], | |
863 | be16toh(local.in6.sin6_port), | |
864 | b[0], b[1], b[2], b[3], | |
865 | be16toh(remote.in6.sin6_port)) < 0) | |
866 | return -ENOMEM; | |
867 | } else { | |
868 | char a[INET6_ADDRSTRLEN], b[INET6_ADDRSTRLEN]; | |
869 | ||
870 | if (asprintf(&r, | |
871 | "%u-%s:%u-%s:%u", | |
872 | nr, | |
873 | inet_ntop(AF_INET6, &local.in6.sin6_addr, a, sizeof(a)), | |
874 | be16toh(local.in6.sin6_port), | |
875 | inet_ntop(AF_INET6, &remote.in6.sin6_addr, b, sizeof(b)), | |
876 | be16toh(remote.in6.sin6_port)) < 0) | |
877 | return -ENOMEM; | |
878 | } | |
879 | ||
880 | break; | |
881 | } | |
882 | ||
883 | case AF_UNIX: { | |
884 | struct ucred ucred; | |
885 | int k; | |
886 | ||
887 | k = getpeercred(fd, &ucred); | |
888 | if (k >= 0) { | |
889 | if (asprintf(&r, | |
890 | "%u-"PID_FMT"-"UID_FMT, | |
891 | nr, ucred.pid, ucred.uid) < 0) | |
892 | return -ENOMEM; | |
893 | } else if (k == -ENODATA) { | |
894 | /* This handles the case where somebody is | |
895 | * connecting from another pid/uid namespace | |
896 | * (e.g. from outside of our container). */ | |
897 | if (asprintf(&r, | |
898 | "%u-unknown", | |
899 | nr) < 0) | |
900 | return -ENOMEM; | |
901 | } else | |
902 | return k; | |
903 | ||
904 | break; | |
905 | } | |
906 | ||
907 | case AF_VSOCK: | |
908 | if (asprintf(&r, | |
909 | "%u-%u:%u-%u:%u", | |
910 | nr, | |
911 | local.vm.svm_cid, local.vm.svm_port, | |
912 | remote.vm.svm_cid, remote.vm.svm_port) < 0) | |
913 | return -ENOMEM; | |
914 | ||
915 | break; | |
916 | ||
917 | default: | |
918 | assert_not_reached("Unhandled socket type."); | |
919 | } | |
920 | ||
921 | *instance = r; | |
922 | return 0; | |
923 | } | |
924 | ||
925 | static void socket_close_fds(Socket *s) { | |
926 | SocketPort *p; | |
927 | char **i; | |
928 | ||
929 | assert(s); | |
930 | ||
931 | LIST_FOREACH(port, p, s->ports) { | |
932 | bool was_open; | |
933 | ||
934 | was_open = p->fd >= 0; | |
935 | ||
936 | p->event_source = sd_event_source_disable_unref(p->event_source); | |
937 | p->fd = safe_close(p->fd); | |
938 | socket_cleanup_fd_list(p); | |
939 | ||
940 | /* One little note: we should normally not delete any sockets in the file system here! After all some | |
941 | * other process we spawned might still have a reference of this fd and wants to continue to use | |
942 | * it. Therefore we normally delete sockets in the file system before we create a new one, not after we | |
943 | * stopped using one! That all said, if the user explicitly requested this, we'll delete them here | |
944 | * anyway, but only then. */ | |
945 | ||
946 | if (!was_open || !s->remove_on_stop) | |
947 | continue; | |
948 | ||
949 | switch (p->type) { | |
950 | ||
951 | case SOCKET_FIFO: | |
952 | (void) unlink(p->path); | |
953 | break; | |
954 | ||
955 | case SOCKET_MQUEUE: | |
956 | (void) mq_unlink(p->path); | |
957 | break; | |
958 | ||
959 | case SOCKET_SOCKET: | |
960 | (void) socket_address_unlink(&p->address); | |
961 | break; | |
962 | ||
963 | default: | |
964 | break; | |
965 | } | |
966 | } | |
967 | ||
968 | if (s->remove_on_stop) | |
969 | STRV_FOREACH(i, s->symlinks) | |
970 | (void) unlink(*i); | |
971 | ||
972 | /* Note that we don't return NULL here, since s has not been freed. */ | |
973 | } | |
974 | ||
975 | static void socket_apply_socket_options(Socket *s, SocketPort *p, int fd) { | |
976 | int r; | |
977 | ||
978 | assert(s); | |
979 | assert(p); | |
980 | assert(fd >= 0); | |
981 | ||
982 | if (s->keep_alive) { | |
983 | r = setsockopt_int(fd, SOL_SOCKET, SO_KEEPALIVE, true); | |
984 | if (r < 0) | |
985 | log_unit_warning_errno(UNIT(s), r, "SO_KEEPALIVE failed: %m"); | |
986 | } | |
987 | ||
988 | if (s->keep_alive_time > 0) { | |
989 | r = setsockopt_int(fd, SOL_TCP, TCP_KEEPIDLE, s->keep_alive_time / USEC_PER_SEC); | |
990 | if (r < 0) | |
991 | log_unit_warning_errno(UNIT(s), r, "TCP_KEEPIDLE failed: %m"); | |
992 | } | |
993 | ||
994 | if (s->keep_alive_interval > 0) { | |
995 | r = setsockopt_int(fd, SOL_TCP, TCP_KEEPINTVL, s->keep_alive_interval / USEC_PER_SEC); | |
996 | if (r < 0) | |
997 | log_unit_warning_errno(UNIT(s), r, "TCP_KEEPINTVL failed: %m"); | |
998 | } | |
999 | ||
1000 | if (s->keep_alive_cnt > 0) { | |
1001 | r = setsockopt_int(fd, SOL_TCP, TCP_KEEPCNT, s->keep_alive_cnt); | |
1002 | if (r < 0) | |
1003 | log_unit_warning_errno(UNIT(s), r, "TCP_KEEPCNT failed: %m"); | |
1004 | } | |
1005 | ||
1006 | if (s->defer_accept > 0) { | |
1007 | r = setsockopt_int(fd, SOL_TCP, TCP_DEFER_ACCEPT, s->defer_accept / USEC_PER_SEC); | |
1008 | if (r < 0) | |
1009 | log_unit_warning_errno(UNIT(s), r, "TCP_DEFER_ACCEPT failed: %m"); | |
1010 | } | |
1011 | ||
1012 | if (s->no_delay) { | |
1013 | if (s->socket_protocol == IPPROTO_SCTP) { | |
1014 | r = setsockopt_int(fd, SOL_SCTP, SCTP_NODELAY, true); | |
1015 | if (r < 0) | |
1016 | log_unit_warning_errno(UNIT(s), r, "SCTP_NODELAY failed: %m"); | |
1017 | } else { | |
1018 | r = setsockopt_int(fd, SOL_TCP, TCP_NODELAY, true); | |
1019 | if (r < 0) | |
1020 | log_unit_warning_errno(UNIT(s), r, "TCP_NODELAY failed: %m"); | |
1021 | } | |
1022 | } | |
1023 | ||
1024 | if (s->broadcast) { | |
1025 | r = setsockopt_int(fd, SOL_SOCKET, SO_BROADCAST, true); | |
1026 | if (r < 0) | |
1027 | log_unit_warning_errno(UNIT(s), r, "SO_BROADCAST failed: %m"); | |
1028 | } | |
1029 | ||
1030 | if (s->pass_cred) { | |
1031 | r = setsockopt_int(fd, SOL_SOCKET, SO_PASSCRED, true); | |
1032 | if (r < 0) | |
1033 | log_unit_warning_errno(UNIT(s), r, "SO_PASSCRED failed: %m"); | |
1034 | } | |
1035 | ||
1036 | if (s->pass_sec) { | |
1037 | r = setsockopt_int(fd, SOL_SOCKET, SO_PASSSEC, true); | |
1038 | if (r < 0) | |
1039 | log_unit_warning_errno(UNIT(s), r, "SO_PASSSEC failed: %m"); | |
1040 | } | |
1041 | ||
1042 | if (s->pass_pktinfo) { | |
1043 | r = socket_set_recvpktinfo(fd, socket_address_family(&p->address), true); | |
1044 | if (r < 0) | |
1045 | log_unit_warning_errno(UNIT(s), r, "Failed to enable packet info socket option: %m"); | |
1046 | } | |
1047 | ||
1048 | if (s->timestamping != SOCKET_TIMESTAMPING_OFF) { | |
1049 | r = setsockopt_int(fd, SOL_SOCKET, | |
1050 | s->timestamping == SOCKET_TIMESTAMPING_NS ? SO_TIMESTAMPNS : SO_TIMESTAMP, | |
1051 | true); | |
1052 | if (r < 0) | |
1053 | log_unit_warning_errno(UNIT(s), r, "Failed to enable timestamping socket option, ignoring: %m"); | |
1054 | } | |
1055 | ||
1056 | if (s->priority >= 0) { | |
1057 | r = setsockopt_int(fd, SOL_SOCKET, SO_PRIORITY, s->priority); | |
1058 | if (r < 0) | |
1059 | log_unit_warning_errno(UNIT(s), r, "SO_PRIORITY failed: %m"); | |
1060 | } | |
1061 | ||
1062 | if (s->receive_buffer > 0) { | |
1063 | r = fd_set_rcvbuf(fd, s->receive_buffer, false); | |
1064 | if (r < 0) | |
1065 | log_unit_full_errno(UNIT(s), ERRNO_IS_PRIVILEGE(r) ? LOG_DEBUG : LOG_WARNING, r, | |
1066 | "SO_RCVBUF/SO_RCVBUFFORCE failed: %m"); | |
1067 | } | |
1068 | ||
1069 | if (s->send_buffer > 0) { | |
1070 | r = fd_set_sndbuf(fd, s->send_buffer, false); | |
1071 | if (r < 0) | |
1072 | log_unit_full_errno(UNIT(s), ERRNO_IS_PRIVILEGE(r) ? LOG_DEBUG : LOG_WARNING, r, | |
1073 | "SO_SNDBUF/SO_SNDBUFFORCE failed: %m"); | |
1074 | } | |
1075 | ||
1076 | if (s->mark >= 0) { | |
1077 | r = setsockopt_int(fd, SOL_SOCKET, SO_MARK, s->mark); | |
1078 | if (r < 0) | |
1079 | log_unit_warning_errno(UNIT(s), r, "SO_MARK failed: %m"); | |
1080 | } | |
1081 | ||
1082 | if (s->ip_tos >= 0) { | |
1083 | r = setsockopt_int(fd, IPPROTO_IP, IP_TOS, s->ip_tos); | |
1084 | if (r < 0) | |
1085 | log_unit_warning_errno(UNIT(s), r, "IP_TOS failed: %m"); | |
1086 | } | |
1087 | ||
1088 | if (s->ip_ttl >= 0) { | |
1089 | r = socket_set_ttl(fd, socket_address_family(&p->address), s->ip_ttl); | |
1090 | if (r < 0) | |
1091 | log_unit_warning_errno(UNIT(s), r, "IP_TTL/IPV6_UNICAST_HOPS failed: %m"); | |
1092 | } | |
1093 | ||
1094 | if (s->tcp_congestion) | |
1095 | if (setsockopt(fd, SOL_TCP, TCP_CONGESTION, s->tcp_congestion, strlen(s->tcp_congestion)+1) < 0) | |
1096 | log_unit_warning_errno(UNIT(s), errno, "TCP_CONGESTION failed: %m"); | |
1097 | ||
1098 | if (s->smack_ip_in) { | |
1099 | r = mac_smack_apply_fd(fd, SMACK_ATTR_IPIN, s->smack_ip_in); | |
1100 | if (r < 0) | |
1101 | log_unit_error_errno(UNIT(s), r, "mac_smack_apply_ip_in_fd: %m"); | |
1102 | } | |
1103 | ||
1104 | if (s->smack_ip_out) { | |
1105 | r = mac_smack_apply_fd(fd, SMACK_ATTR_IPOUT, s->smack_ip_out); | |
1106 | if (r < 0) | |
1107 | log_unit_error_errno(UNIT(s), r, "mac_smack_apply_ip_out_fd: %m"); | |
1108 | } | |
1109 | } | |
1110 | ||
1111 | static void socket_apply_fifo_options(Socket *s, int fd) { | |
1112 | int r; | |
1113 | ||
1114 | assert(s); | |
1115 | assert(fd >= 0); | |
1116 | ||
1117 | if (s->pipe_size > 0) | |
1118 | if (fcntl(fd, F_SETPIPE_SZ, s->pipe_size) < 0) | |
1119 | log_unit_warning_errno(UNIT(s), errno, "Setting pipe size failed, ignoring: %m"); | |
1120 | ||
1121 | if (s->smack) { | |
1122 | r = mac_smack_apply_fd(fd, SMACK_ATTR_ACCESS, s->smack); | |
1123 | if (r < 0) | |
1124 | log_unit_error_errno(UNIT(s), r, "SMACK relabelling failed, ignoring: %m"); | |
1125 | } | |
1126 | } | |
1127 | ||
1128 | static int fifo_address_create( | |
1129 | const char *path, | |
1130 | mode_t directory_mode, | |
1131 | mode_t socket_mode) { | |
1132 | ||
1133 | _cleanup_close_ int fd = -1; | |
1134 | mode_t old_mask; | |
1135 | struct stat st; | |
1136 | int r; | |
1137 | ||
1138 | assert(path); | |
1139 | ||
1140 | (void) mkdir_parents_label(path, directory_mode); | |
1141 | ||
1142 | r = mac_selinux_create_file_prepare(path, S_IFIFO); | |
1143 | if (r < 0) | |
1144 | return r; | |
1145 | ||
1146 | /* Enforce the right access mode for the fifo */ | |
1147 | old_mask = umask(~socket_mode); | |
1148 | ||
1149 | /* Include the original umask in our mask */ | |
1150 | (void) umask(~socket_mode | old_mask); | |
1151 | ||
1152 | r = mkfifo(path, socket_mode); | |
1153 | (void) umask(old_mask); | |
1154 | ||
1155 | if (r < 0 && errno != EEXIST) { | |
1156 | r = -errno; | |
1157 | goto fail; | |
1158 | } | |
1159 | ||
1160 | fd = open(path, O_RDWR | O_CLOEXEC | O_NOCTTY | O_NONBLOCK | O_NOFOLLOW); | |
1161 | if (fd < 0) { | |
1162 | r = -errno; | |
1163 | goto fail; | |
1164 | } | |
1165 | ||
1166 | mac_selinux_create_file_clear(); | |
1167 | ||
1168 | if (fstat(fd, &st) < 0) { | |
1169 | r = -errno; | |
1170 | goto fail; | |
1171 | } | |
1172 | ||
1173 | if (!S_ISFIFO(st.st_mode) || | |
1174 | (st.st_mode & 0777) != (socket_mode & ~old_mask) || | |
1175 | st.st_uid != getuid() || | |
1176 | st.st_gid != getgid()) { | |
1177 | r = -EEXIST; | |
1178 | goto fail; | |
1179 | } | |
1180 | ||
1181 | return TAKE_FD(fd); | |
1182 | ||
1183 | fail: | |
1184 | mac_selinux_create_file_clear(); | |
1185 | return r; | |
1186 | } | |
1187 | ||
1188 | static int special_address_create(const char *path, bool writable) { | |
1189 | _cleanup_close_ int fd = -1; | |
1190 | struct stat st; | |
1191 | ||
1192 | assert(path); | |
1193 | ||
1194 | fd = open(path, (writable ? O_RDWR : O_RDONLY)|O_CLOEXEC|O_NOCTTY|O_NONBLOCK|O_NOFOLLOW); | |
1195 | if (fd < 0) | |
1196 | return -errno; | |
1197 | ||
1198 | if (fstat(fd, &st) < 0) | |
1199 | return -errno; | |
1200 | ||
1201 | /* Check whether this is a /proc, /sys or /dev file or char device */ | |
1202 | if (!S_ISREG(st.st_mode) && !S_ISCHR(st.st_mode)) | |
1203 | return -EEXIST; | |
1204 | ||
1205 | return TAKE_FD(fd); | |
1206 | } | |
1207 | ||
1208 | static int usbffs_address_create(const char *path) { | |
1209 | _cleanup_close_ int fd = -1; | |
1210 | struct stat st; | |
1211 | ||
1212 | assert(path); | |
1213 | ||
1214 | fd = open(path, O_RDWR|O_CLOEXEC|O_NOCTTY|O_NONBLOCK|O_NOFOLLOW); | |
1215 | if (fd < 0) | |
1216 | return -errno; | |
1217 | ||
1218 | if (fstat(fd, &st) < 0) | |
1219 | return -errno; | |
1220 | ||
1221 | /* Check whether this is a regular file (ffs endpoint) */ | |
1222 | if (!S_ISREG(st.st_mode)) | |
1223 | return -EEXIST; | |
1224 | ||
1225 | return TAKE_FD(fd); | |
1226 | } | |
1227 | ||
1228 | static int mq_address_create( | |
1229 | const char *path, | |
1230 | mode_t mq_mode, | |
1231 | long maxmsg, | |
1232 | long msgsize) { | |
1233 | ||
1234 | _cleanup_close_ int fd = -1; | |
1235 | struct stat st; | |
1236 | mode_t old_mask; | |
1237 | struct mq_attr _attr, *attr = NULL; | |
1238 | ||
1239 | assert(path); | |
1240 | ||
1241 | if (maxmsg > 0 && msgsize > 0) { | |
1242 | _attr = (struct mq_attr) { | |
1243 | .mq_flags = O_NONBLOCK, | |
1244 | .mq_maxmsg = maxmsg, | |
1245 | .mq_msgsize = msgsize, | |
1246 | }; | |
1247 | attr = &_attr; | |
1248 | } | |
1249 | ||
1250 | /* Enforce the right access mode for the mq */ | |
1251 | old_mask = umask(~mq_mode); | |
1252 | ||
1253 | /* Include the original umask in our mask */ | |
1254 | (void) umask(~mq_mode | old_mask); | |
1255 | fd = mq_open(path, O_RDONLY|O_CLOEXEC|O_NONBLOCK|O_CREAT, mq_mode, attr); | |
1256 | (void) umask(old_mask); | |
1257 | ||
1258 | if (fd < 0) | |
1259 | return -errno; | |
1260 | ||
1261 | if (fstat(fd, &st) < 0) | |
1262 | return -errno; | |
1263 | ||
1264 | if ((st.st_mode & 0777) != (mq_mode & ~old_mask) || | |
1265 | st.st_uid != getuid() || | |
1266 | st.st_gid != getgid()) | |
1267 | return -EEXIST; | |
1268 | ||
1269 | return TAKE_FD(fd); | |
1270 | } | |
1271 | ||
1272 | static int socket_symlink(Socket *s) { | |
1273 | const char *p; | |
1274 | char **i; | |
1275 | int r; | |
1276 | ||
1277 | assert(s); | |
1278 | ||
1279 | p = socket_find_symlink_target(s); | |
1280 | if (!p) | |
1281 | return 0; | |
1282 | ||
1283 | STRV_FOREACH(i, s->symlinks) { | |
1284 | (void) mkdir_parents_label(*i, s->directory_mode); | |
1285 | ||
1286 | r = symlink_idempotent(p, *i, false); | |
1287 | ||
1288 | if (r == -EEXIST && s->remove_on_stop) { | |
1289 | /* If there's already something where we want to create the symlink, and the destructive | |
1290 | * RemoveOnStop= mode is set, then we might as well try to remove what already exists and try | |
1291 | * again. */ | |
1292 | ||
1293 | if (unlink(*i) >= 0) | |
1294 | r = symlink_idempotent(p, *i, false); | |
1295 | } | |
1296 | ||
1297 | if (r < 0) | |
1298 | log_unit_warning_errno(UNIT(s), r, "Failed to create symlink %s → %s, ignoring: %m", p, *i); | |
1299 | } | |
1300 | ||
1301 | return 0; | |
1302 | } | |
1303 | ||
1304 | static int usbffs_write_descs(int fd, Service *s) { | |
1305 | int r; | |
1306 | ||
1307 | if (!s->usb_function_descriptors || !s->usb_function_strings) | |
1308 | return -EINVAL; | |
1309 | ||
1310 | r = copy_file_fd(s->usb_function_descriptors, fd, 0); | |
1311 | if (r < 0) | |
1312 | return r; | |
1313 | ||
1314 | return copy_file_fd(s->usb_function_strings, fd, 0); | |
1315 | } | |
1316 | ||
1317 | static int usbffs_select_ep(const struct dirent *d) { | |
1318 | return d->d_name[0] != '.' && !streq(d->d_name, "ep0"); | |
1319 | } | |
1320 | ||
1321 | static int usbffs_dispatch_eps(SocketPort *p) { | |
1322 | _cleanup_free_ struct dirent **ent = NULL; | |
1323 | size_t n, k; | |
1324 | int r; | |
1325 | ||
1326 | r = scandir(p->path, &ent, usbffs_select_ep, alphasort); | |
1327 | if (r < 0) | |
1328 | return -errno; | |
1329 | ||
1330 | n = (size_t) r; | |
1331 | p->auxiliary_fds = new(int, n); | |
1332 | if (!p->auxiliary_fds) { | |
1333 | r = -ENOMEM; | |
1334 | goto clear; | |
1335 | } | |
1336 | ||
1337 | p->n_auxiliary_fds = n; | |
1338 | ||
1339 | k = 0; | |
1340 | for (size_t i = 0; i < n; ++i) { | |
1341 | _cleanup_free_ char *ep = NULL; | |
1342 | ||
1343 | ep = path_make_absolute(ent[i]->d_name, p->path); | |
1344 | if (!ep) { | |
1345 | r = -ENOMEM; | |
1346 | goto fail; | |
1347 | } | |
1348 | ||
1349 | path_simplify(ep); | |
1350 | ||
1351 | r = usbffs_address_create(ep); | |
1352 | if (r < 0) | |
1353 | goto fail; | |
1354 | ||
1355 | p->auxiliary_fds[k++] = r; | |
1356 | } | |
1357 | ||
1358 | r = 0; | |
1359 | goto clear; | |
1360 | ||
1361 | fail: | |
1362 | close_many(p->auxiliary_fds, k); | |
1363 | p->auxiliary_fds = mfree(p->auxiliary_fds); | |
1364 | p->n_auxiliary_fds = 0; | |
1365 | ||
1366 | clear: | |
1367 | for (size_t i = 0; i < n; ++i) | |
1368 | free(ent[i]); | |
1369 | ||
1370 | return r; | |
1371 | } | |
1372 | ||
1373 | int socket_load_service_unit(Socket *s, int cfd, Unit **ret) { | |
1374 | /* Figure out what the unit that will be used to handle the connections on the socket looks like. | |
1375 | * | |
1376 | * If cfd < 0, then we don't have a connection yet. In case of Accept=yes sockets, use a fake | |
1377 | * instance name. | |
1378 | */ | |
1379 | ||
1380 | if (UNIT_ISSET(s->service)) { | |
1381 | *ret = UNIT_DEREF(s->service); | |
1382 | return 0; | |
1383 | } | |
1384 | ||
1385 | if (!s->accept) | |
1386 | return -ENODATA; | |
1387 | ||
1388 | /* Build the instance name and load the unit */ | |
1389 | _cleanup_free_ char *prefix = NULL, *instance = NULL, *name = NULL; | |
1390 | int r; | |
1391 | ||
1392 | r = unit_name_to_prefix(UNIT(s)->id, &prefix); | |
1393 | if (r < 0) | |
1394 | return r; | |
1395 | ||
1396 | if (cfd >= 0) { | |
1397 | r = instance_from_socket(cfd, s->n_accepted, &instance); | |
1398 | if (ERRNO_IS_DISCONNECT(r)) | |
1399 | /* ENOTCONN is legitimate if TCP RST was received. Other socket families might return | |
1400 | * different errors. This connection is over, but the socket unit lives on. */ | |
1401 | return log_unit_debug_errno(UNIT(s), r, | |
1402 | "Got %s on incoming socket, assuming aborted connection attempt, ignoring.", | |
1403 | errno_to_name(r)); | |
1404 | if (r < 0) | |
1405 | return r; | |
1406 | } | |
1407 | ||
1408 | /* For accepting sockets, we don't know how the instance will be called until we get a connection and | |
1409 | * can figure out what the peer name is. So let's use "internal" as the instance to make it clear | |
1410 | * that this is not an actual peer name. We use "unknown" when we cannot figure out the peer. */ | |
1411 | r = unit_name_build(prefix, instance ?: "internal", ".service", &name); | |
1412 | if (r < 0) | |
1413 | return r; | |
1414 | ||
1415 | return manager_load_unit(UNIT(s)->manager, name, NULL, NULL, ret); | |
1416 | } | |
1417 | ||
1418 | static int socket_determine_selinux_label(Socket *s, char **ret) { | |
1419 | int r; | |
1420 | ||
1421 | assert(s); | |
1422 | assert(ret); | |
1423 | ||
1424 | if (s->selinux_context_from_net) { | |
1425 | /* If this is requested, get the label from the network label */ | |
1426 | ||
1427 | r = mac_selinux_get_our_label(ret); | |
1428 | if (r == -EOPNOTSUPP) | |
1429 | goto no_label; | |
1430 | ||
1431 | } else { | |
1432 | /* Otherwise, get it from the executable we are about to start. */ | |
1433 | ||
1434 | Unit *service; | |
1435 | ExecCommand *c; | |
1436 | _cleanup_free_ char *path = NULL; | |
1437 | ||
1438 | r = socket_load_service_unit(s, -1, &service); | |
1439 | if (r == -ENODATA) | |
1440 | goto no_label; | |
1441 | if (r < 0) | |
1442 | return r; | |
1443 | ||
1444 | c = SERVICE(service)->exec_command[SERVICE_EXEC_START]; | |
1445 | if (!c) | |
1446 | goto no_label; | |
1447 | ||
1448 | r = chase_symlinks(c->path, SERVICE(service)->exec_context.root_directory, CHASE_PREFIX_ROOT, &path, NULL); | |
1449 | if (r < 0) | |
1450 | goto no_label; | |
1451 | ||
1452 | r = mac_selinux_get_create_label_from_exe(path, ret); | |
1453 | if (IN_SET(r, -EPERM, -EOPNOTSUPP)) | |
1454 | goto no_label; | |
1455 | } | |
1456 | ||
1457 | return r; | |
1458 | ||
1459 | no_label: | |
1460 | *ret = NULL; | |
1461 | return 0; | |
1462 | } | |
1463 | ||
1464 | static int socket_address_listen_do( | |
1465 | Socket *s, | |
1466 | const SocketAddress *address, | |
1467 | const char *label) { | |
1468 | ||
1469 | assert(s); | |
1470 | assert(address); | |
1471 | ||
1472 | return socket_address_listen( | |
1473 | address, | |
1474 | SOCK_CLOEXEC|SOCK_NONBLOCK, | |
1475 | s->backlog, | |
1476 | s->bind_ipv6_only, | |
1477 | s->bind_to_device, | |
1478 | s->reuse_port, | |
1479 | s->free_bind, | |
1480 | s->transparent, | |
1481 | s->directory_mode, | |
1482 | s->socket_mode, | |
1483 | label); | |
1484 | } | |
1485 | ||
1486 | #define log_address_error_errno(u, address, error, fmt) \ | |
1487 | ({ \ | |
1488 | _cleanup_free_ char *_t = NULL; \ | |
1489 | \ | |
1490 | (void) socket_address_print(address, &_t); \ | |
1491 | log_unit_error_errno(u, error, fmt, strna(_t)); \ | |
1492 | }) | |
1493 | ||
1494 | static int fork_needed(const SocketAddress *address, const ExecContext *context) { | |
1495 | int r; | |
1496 | ||
1497 | assert(address); | |
1498 | assert(context); | |
1499 | ||
1500 | /* Check if we need to do the cgroup or netns stuff. If not we can do things much simpler. */ | |
1501 | ||
1502 | if (IN_SET(address->sockaddr.sa.sa_family, AF_INET, AF_INET6)) { | |
1503 | r = bpf_firewall_supported(); | |
1504 | if (r < 0) | |
1505 | return r; | |
1506 | if (r != BPF_FIREWALL_UNSUPPORTED) /* If BPF firewalling isn't supported anyway — there's no point in this forking complexity */ | |
1507 | return true; | |
1508 | } | |
1509 | ||
1510 | return context->private_network || context->network_namespace_path; | |
1511 | } | |
1512 | ||
1513 | static int socket_address_listen_in_cgroup( | |
1514 | Socket *s, | |
1515 | const SocketAddress *address, | |
1516 | const char *label) { | |
1517 | ||
1518 | _cleanup_close_pair_ int pair[2] = { -1, -1 }; | |
1519 | int fd, r; | |
1520 | pid_t pid; | |
1521 | ||
1522 | assert(s); | |
1523 | assert(address); | |
1524 | ||
1525 | /* This is a wrapper around socket_address_listen(), that forks off a helper process inside the | |
1526 | * socket's cgroup and network namespace in which the socket is actually created. This way we ensure | |
1527 | * the socket is actually properly attached to the unit's cgroup for the purpose of BPF filtering and | |
1528 | * such. */ | |
1529 | ||
1530 | r = fork_needed(address, &s->exec_context); | |
1531 | if (r < 0) | |
1532 | return r; | |
1533 | if (r == 0) { | |
1534 | /* Shortcut things... */ | |
1535 | fd = socket_address_listen_do(s, address, label); | |
1536 | if (fd < 0) | |
1537 | return log_address_error_errno(UNIT(s), address, fd, "Failed to create listening socket (%s): %m"); | |
1538 | ||
1539 | return fd; | |
1540 | } | |
1541 | ||
1542 | r = unit_setup_exec_runtime(UNIT(s)); | |
1543 | if (r < 0) | |
1544 | return log_unit_error_errno(UNIT(s), r, "Failed acquire runtime: %m"); | |
1545 | ||
1546 | if (s->exec_context.network_namespace_path && | |
1547 | s->exec_runtime && | |
1548 | s->exec_runtime->netns_storage_socket[0] >= 0) { | |
1549 | r = open_shareable_ns_path(s->exec_runtime->netns_storage_socket, s->exec_context.network_namespace_path, CLONE_NEWNET); | |
1550 | if (r < 0) | |
1551 | return log_unit_error_errno(UNIT(s), r, "Failed to open network namespace path %s: %m", s->exec_context.network_namespace_path); | |
1552 | } | |
1553 | ||
1554 | if (s->exec_context.ipc_namespace_path && | |
1555 | s->exec_runtime && | |
1556 | s->exec_runtime->ipcns_storage_socket[0] >= 0) { | |
1557 | r = open_shareable_ns_path(s->exec_runtime->ipcns_storage_socket, s->exec_context.ipc_namespace_path, CLONE_NEWIPC); | |
1558 | if (r < 0) | |
1559 | return log_unit_error_errno(UNIT(s), r, "Failed to open IPC namespace path %s: %m", s->exec_context.ipc_namespace_path); | |
1560 | } | |
1561 | ||
1562 | if (socketpair(AF_UNIX, SOCK_SEQPACKET|SOCK_CLOEXEC, 0, pair) < 0) | |
1563 | return log_unit_error_errno(UNIT(s), errno, "Failed to create communication channel: %m"); | |
1564 | ||
1565 | r = unit_fork_helper_process(UNIT(s), "(sd-listen)", &pid); | |
1566 | if (r < 0) | |
1567 | return log_unit_error_errno(UNIT(s), r, "Failed to fork off listener stub process: %m"); | |
1568 | if (r == 0) { | |
1569 | /* Child */ | |
1570 | ||
1571 | pair[0] = safe_close(pair[0]); | |
1572 | ||
1573 | if ((s->exec_context.private_network || s->exec_context.network_namespace_path) && | |
1574 | s->exec_runtime && | |
1575 | s->exec_runtime->netns_storage_socket[0] >= 0) { | |
1576 | ||
1577 | if (ns_type_supported(NAMESPACE_NET)) { | |
1578 | r = setup_shareable_ns(s->exec_runtime->netns_storage_socket, CLONE_NEWNET); | |
1579 | if (r < 0) { | |
1580 | log_unit_error_errno(UNIT(s), r, "Failed to join network namespace: %m"); | |
1581 | _exit(EXIT_NETWORK); | |
1582 | } | |
1583 | } else if (s->exec_context.network_namespace_path) { | |
1584 | log_unit_error(UNIT(s), "Network namespace path configured but network namespaces not supported."); | |
1585 | _exit(EXIT_NETWORK); | |
1586 | } else | |
1587 | log_unit_warning(UNIT(s), "PrivateNetwork=yes is configured, but the kernel does not support network namespaces, ignoring."); | |
1588 | } | |
1589 | ||
1590 | fd = socket_address_listen_do(s, address, label); | |
1591 | if (fd < 0) { | |
1592 | log_address_error_errno(UNIT(s), address, fd, "Failed to create listening socket (%s): %m"); | |
1593 | _exit(EXIT_FAILURE); | |
1594 | } | |
1595 | ||
1596 | r = send_one_fd(pair[1], fd, 0); | |
1597 | if (r < 0) { | |
1598 | log_address_error_errno(UNIT(s), address, r, "Failed to send listening socket (%s) to parent: %m"); | |
1599 | _exit(EXIT_FAILURE); | |
1600 | } | |
1601 | ||
1602 | _exit(EXIT_SUCCESS); | |
1603 | } | |
1604 | ||
1605 | pair[1] = safe_close(pair[1]); | |
1606 | fd = receive_one_fd(pair[0], 0); | |
1607 | ||
1608 | /* We synchronously wait for the helper, as it shouldn't be slow */ | |
1609 | r = wait_for_terminate_and_check("(sd-listen)", pid, WAIT_LOG_ABNORMAL); | |
1610 | if (r < 0) { | |
1611 | safe_close(fd); | |
1612 | return r; | |
1613 | } | |
1614 | ||
1615 | if (fd < 0) | |
1616 | return log_address_error_errno(UNIT(s), address, fd, "Failed to receive listening socket (%s): %m"); | |
1617 | ||
1618 | return fd; | |
1619 | } | |
1620 | ||
1621 | DEFINE_TRIVIAL_CLEANUP_FUNC_FULL(Socket *, socket_close_fds, NULL); | |
1622 | ||
1623 | static int socket_open_fds(Socket *orig_s) { | |
1624 | _cleanup_(socket_close_fdsp) Socket *s = orig_s; | |
1625 | _cleanup_(mac_selinux_freep) char *label = NULL; | |
1626 | bool know_label = false; | |
1627 | SocketPort *p; | |
1628 | int r; | |
1629 | ||
1630 | assert(s); | |
1631 | ||
1632 | LIST_FOREACH(port, p, s->ports) { | |
1633 | ||
1634 | if (p->fd >= 0) | |
1635 | continue; | |
1636 | ||
1637 | switch (p->type) { | |
1638 | ||
1639 | case SOCKET_SOCKET: | |
1640 | ||
1641 | if (!know_label) { | |
1642 | /* Figure out the label, if we don't it know yet. We do it once for the first | |
1643 | * socket where we need this and remember it for the rest. */ | |
1644 | ||
1645 | r = socket_determine_selinux_label(s, &label); | |
1646 | if (r < 0) | |
1647 | return log_unit_error_errno(UNIT(s), r, "Failed to determine SELinux label: %m"); | |
1648 | ||
1649 | know_label = true; | |
1650 | } | |
1651 | ||
1652 | /* Apply the socket protocol */ | |
1653 | switch (p->address.type) { | |
1654 | ||
1655 | case SOCK_STREAM: | |
1656 | case SOCK_SEQPACKET: | |
1657 | if (s->socket_protocol == IPPROTO_SCTP) | |
1658 | p->address.protocol = s->socket_protocol; | |
1659 | break; | |
1660 | ||
1661 | case SOCK_DGRAM: | |
1662 | if (s->socket_protocol == IPPROTO_UDPLITE) | |
1663 | p->address.protocol = s->socket_protocol; | |
1664 | break; | |
1665 | } | |
1666 | ||
1667 | p->fd = socket_address_listen_in_cgroup(s, &p->address, label); | |
1668 | if (p->fd < 0) | |
1669 | return p->fd; | |
1670 | ||
1671 | socket_apply_socket_options(s, p, p->fd); | |
1672 | socket_symlink(s); | |
1673 | break; | |
1674 | ||
1675 | case SOCKET_SPECIAL: | |
1676 | ||
1677 | p->fd = special_address_create(p->path, s->writable); | |
1678 | if (p->fd < 0) | |
1679 | return log_unit_error_errno(UNIT(s), p->fd, "Failed to open special file %s: %m", p->path); | |
1680 | break; | |
1681 | ||
1682 | case SOCKET_FIFO: | |
1683 | ||
1684 | p->fd = fifo_address_create( | |
1685 | p->path, | |
1686 | s->directory_mode, | |
1687 | s->socket_mode); | |
1688 | if (p->fd < 0) | |
1689 | return log_unit_error_errno(UNIT(s), p->fd, "Failed to open FIFO %s: %m", p->path); | |
1690 | ||
1691 | socket_apply_fifo_options(s, p->fd); | |
1692 | socket_symlink(s); | |
1693 | break; | |
1694 | ||
1695 | case SOCKET_MQUEUE: | |
1696 | ||
1697 | p->fd = mq_address_create( | |
1698 | p->path, | |
1699 | s->socket_mode, | |
1700 | s->mq_maxmsg, | |
1701 | s->mq_msgsize); | |
1702 | if (p->fd < 0) | |
1703 | return log_unit_error_errno(UNIT(s), p->fd, "Failed to open message queue %s: %m", p->path); | |
1704 | break; | |
1705 | ||
1706 | case SOCKET_USB_FUNCTION: { | |
1707 | _cleanup_free_ char *ep = NULL; | |
1708 | ||
1709 | ep = path_make_absolute("ep0", p->path); | |
1710 | if (!ep) | |
1711 | return -ENOMEM; | |
1712 | ||
1713 | p->fd = usbffs_address_create(ep); | |
1714 | if (p->fd < 0) | |
1715 | return p->fd; | |
1716 | ||
1717 | r = usbffs_write_descs(p->fd, SERVICE(UNIT_DEREF(s->service))); | |
1718 | if (r < 0) | |
1719 | return r; | |
1720 | ||
1721 | r = usbffs_dispatch_eps(p); | |
1722 | if (r < 0) | |
1723 | return r; | |
1724 | ||
1725 | break; | |
1726 | } | |
1727 | default: | |
1728 | assert_not_reached("Unknown port type"); | |
1729 | } | |
1730 | } | |
1731 | ||
1732 | s = NULL; | |
1733 | return 0; | |
1734 | } | |
1735 | ||
1736 | static void socket_unwatch_fds(Socket *s) { | |
1737 | SocketPort *p; | |
1738 | int r; | |
1739 | ||
1740 | assert(s); | |
1741 | ||
1742 | LIST_FOREACH(port, p, s->ports) { | |
1743 | if (p->fd < 0) | |
1744 | continue; | |
1745 | ||
1746 | if (!p->event_source) | |
1747 | continue; | |
1748 | ||
1749 | r = sd_event_source_set_enabled(p->event_source, SD_EVENT_OFF); | |
1750 | if (r < 0) | |
1751 | log_unit_debug_errno(UNIT(s), r, "Failed to disable event source: %m"); | |
1752 | } | |
1753 | } | |
1754 | ||
1755 | static int socket_watch_fds(Socket *s) { | |
1756 | SocketPort *p; | |
1757 | int r; | |
1758 | ||
1759 | assert(s); | |
1760 | ||
1761 | LIST_FOREACH(port, p, s->ports) { | |
1762 | if (p->fd < 0) | |
1763 | continue; | |
1764 | ||
1765 | if (p->event_source) { | |
1766 | r = sd_event_source_set_enabled(p->event_source, SD_EVENT_ON); | |
1767 | if (r < 0) | |
1768 | goto fail; | |
1769 | } else { | |
1770 | r = sd_event_add_io(UNIT(s)->manager->event, &p->event_source, p->fd, EPOLLIN, socket_dispatch_io, p); | |
1771 | if (r < 0) | |
1772 | goto fail; | |
1773 | ||
1774 | (void) sd_event_source_set_description(p->event_source, "socket-port-io"); | |
1775 | } | |
1776 | } | |
1777 | ||
1778 | return 0; | |
1779 | ||
1780 | fail: | |
1781 | log_unit_warning_errno(UNIT(s), r, "Failed to watch listening fds: %m"); | |
1782 | socket_unwatch_fds(s); | |
1783 | return r; | |
1784 | } | |
1785 | ||
1786 | enum { | |
1787 | SOCKET_OPEN_NONE, | |
1788 | SOCKET_OPEN_SOME, | |
1789 | SOCKET_OPEN_ALL, | |
1790 | }; | |
1791 | ||
1792 | static int socket_check_open(Socket *s) { | |
1793 | bool have_open = false, have_closed = false; | |
1794 | SocketPort *p; | |
1795 | ||
1796 | assert(s); | |
1797 | ||
1798 | LIST_FOREACH(port, p, s->ports) { | |
1799 | if (p->fd < 0) | |
1800 | have_closed = true; | |
1801 | else | |
1802 | have_open = true; | |
1803 | ||
1804 | if (have_open && have_closed) | |
1805 | return SOCKET_OPEN_SOME; | |
1806 | } | |
1807 | ||
1808 | if (have_open) | |
1809 | return SOCKET_OPEN_ALL; | |
1810 | ||
1811 | return SOCKET_OPEN_NONE; | |
1812 | } | |
1813 | ||
1814 | static void socket_set_state(Socket *s, SocketState state) { | |
1815 | SocketState old_state; | |
1816 | assert(s); | |
1817 | ||
1818 | if (s->state != state) | |
1819 | bus_unit_send_pending_change_signal(UNIT(s), false); | |
1820 | ||
1821 | old_state = s->state; | |
1822 | s->state = state; | |
1823 | ||
1824 | if (!IN_SET(state, | |
1825 | SOCKET_START_PRE, | |
1826 | SOCKET_START_CHOWN, | |
1827 | SOCKET_START_POST, | |
1828 | SOCKET_STOP_PRE, | |
1829 | SOCKET_STOP_PRE_SIGTERM, | |
1830 | SOCKET_STOP_PRE_SIGKILL, | |
1831 | SOCKET_STOP_POST, | |
1832 | SOCKET_FINAL_SIGTERM, | |
1833 | SOCKET_FINAL_SIGKILL, | |
1834 | SOCKET_CLEANING)) { | |
1835 | ||
1836 | s->timer_event_source = sd_event_source_disable_unref(s->timer_event_source); | |
1837 | socket_unwatch_control_pid(s); | |
1838 | s->control_command = NULL; | |
1839 | s->control_command_id = _SOCKET_EXEC_COMMAND_INVALID; | |
1840 | } | |
1841 | ||
1842 | if (state != SOCKET_LISTENING) | |
1843 | socket_unwatch_fds(s); | |
1844 | ||
1845 | if (!IN_SET(state, | |
1846 | SOCKET_START_CHOWN, | |
1847 | SOCKET_START_POST, | |
1848 | SOCKET_LISTENING, | |
1849 | SOCKET_RUNNING, | |
1850 | SOCKET_STOP_PRE, | |
1851 | SOCKET_STOP_PRE_SIGTERM, | |
1852 | SOCKET_STOP_PRE_SIGKILL, | |
1853 | SOCKET_CLEANING)) | |
1854 | socket_close_fds(s); | |
1855 | ||
1856 | if (state != old_state) | |
1857 | log_unit_debug(UNIT(s), "Changed %s -> %s", socket_state_to_string(old_state), socket_state_to_string(state)); | |
1858 | ||
1859 | unit_notify(UNIT(s), state_translation_table[old_state], state_translation_table[state], 0); | |
1860 | } | |
1861 | ||
1862 | static int socket_coldplug(Unit *u) { | |
1863 | Socket *s = SOCKET(u); | |
1864 | int r; | |
1865 | ||
1866 | assert(s); | |
1867 | assert(s->state == SOCKET_DEAD); | |
1868 | ||
1869 | if (s->deserialized_state == s->state) | |
1870 | return 0; | |
1871 | ||
1872 | if (s->control_pid > 0 && | |
1873 | pid_is_unwaited(s->control_pid) && | |
1874 | IN_SET(s->deserialized_state, | |
1875 | SOCKET_START_PRE, | |
1876 | SOCKET_START_CHOWN, | |
1877 | SOCKET_START_POST, | |
1878 | SOCKET_STOP_PRE, | |
1879 | SOCKET_STOP_PRE_SIGTERM, | |
1880 | SOCKET_STOP_PRE_SIGKILL, | |
1881 | SOCKET_STOP_POST, | |
1882 | SOCKET_FINAL_SIGTERM, | |
1883 | SOCKET_FINAL_SIGKILL, | |
1884 | SOCKET_CLEANING)) { | |
1885 | ||
1886 | r = unit_watch_pid(UNIT(s), s->control_pid, false); | |
1887 | if (r < 0) | |
1888 | return r; | |
1889 | ||
1890 | r = socket_arm_timer(s, usec_add(u->state_change_timestamp.monotonic, s->timeout_usec)); | |
1891 | if (r < 0) | |
1892 | return r; | |
1893 | } | |
1894 | ||
1895 | if (IN_SET(s->deserialized_state, | |
1896 | SOCKET_START_CHOWN, | |
1897 | SOCKET_START_POST, | |
1898 | SOCKET_LISTENING, | |
1899 | SOCKET_RUNNING)) { | |
1900 | ||
1901 | /* Originally, we used to simply reopen all sockets here that we didn't have file descriptors | |
1902 | * for. However, this is problematic, as we won't traverse through the SOCKET_START_CHOWN state for | |
1903 | * them, and thus the UID/GID wouldn't be right. Hence, instead simply check if we have all fds open, | |
1904 | * and if there's a mismatch, warn loudly. */ | |
1905 | ||
1906 | r = socket_check_open(s); | |
1907 | if (r == SOCKET_OPEN_NONE) | |
1908 | log_unit_warning(UNIT(s), | |
1909 | "Socket unit configuration has changed while unit has been running, " | |
1910 | "no open socket file descriptor left. " | |
1911 | "The socket unit is not functional until restarted."); | |
1912 | else if (r == SOCKET_OPEN_SOME) | |
1913 | log_unit_warning(UNIT(s), | |
1914 | "Socket unit configuration has changed while unit has been running, " | |
1915 | "and some socket file descriptors have not been opened yet. " | |
1916 | "The socket unit is not fully functional until restarted."); | |
1917 | } | |
1918 | ||
1919 | if (s->deserialized_state == SOCKET_LISTENING) { | |
1920 | r = socket_watch_fds(s); | |
1921 | if (r < 0) | |
1922 | return r; | |
1923 | } | |
1924 | ||
1925 | if (!IN_SET(s->deserialized_state, SOCKET_DEAD, SOCKET_FAILED, SOCKET_CLEANING)) { | |
1926 | (void) unit_setup_dynamic_creds(u); | |
1927 | (void) unit_setup_exec_runtime(u); | |
1928 | } | |
1929 | ||
1930 | socket_set_state(s, s->deserialized_state); | |
1931 | return 0; | |
1932 | } | |
1933 | ||
1934 | static int socket_spawn(Socket *s, ExecCommand *c, pid_t *_pid) { | |
1935 | ||
1936 | _cleanup_(exec_params_clear) ExecParameters exec_params = { | |
1937 | .flags = EXEC_APPLY_SANDBOXING|EXEC_APPLY_CHROOT|EXEC_APPLY_TTY_STDIN, | |
1938 | .stdin_fd = -1, | |
1939 | .stdout_fd = -1, | |
1940 | .stderr_fd = -1, | |
1941 | .exec_fd = -1, | |
1942 | }; | |
1943 | pid_t pid; | |
1944 | int r; | |
1945 | ||
1946 | assert(s); | |
1947 | assert(c); | |
1948 | assert(_pid); | |
1949 | ||
1950 | r = unit_prepare_exec(UNIT(s)); | |
1951 | if (r < 0) | |
1952 | return r; | |
1953 | ||
1954 | r = socket_arm_timer(s, usec_add(now(CLOCK_MONOTONIC), s->timeout_usec)); | |
1955 | if (r < 0) | |
1956 | return r; | |
1957 | ||
1958 | r = unit_set_exec_params(UNIT(s), &exec_params); | |
1959 | if (r < 0) | |
1960 | return r; | |
1961 | ||
1962 | r = exec_spawn(UNIT(s), | |
1963 | c, | |
1964 | &s->exec_context, | |
1965 | &exec_params, | |
1966 | s->exec_runtime, | |
1967 | &s->dynamic_creds, | |
1968 | &pid); | |
1969 | if (r < 0) | |
1970 | return r; | |
1971 | ||
1972 | r = unit_watch_pid(UNIT(s), pid, true); | |
1973 | if (r < 0) | |
1974 | return r; | |
1975 | ||
1976 | *_pid = pid; | |
1977 | ||
1978 | return 0; | |
1979 | } | |
1980 | ||
1981 | static int socket_chown(Socket *s, pid_t *_pid) { | |
1982 | pid_t pid; | |
1983 | int r; | |
1984 | ||
1985 | r = socket_arm_timer(s, usec_add(now(CLOCK_MONOTONIC), s->timeout_usec)); | |
1986 | if (r < 0) | |
1987 | goto fail; | |
1988 | ||
1989 | /* We have to resolve the user names out-of-process, hence | |
1990 | * let's fork here. It's messy, but well, what can we do? */ | |
1991 | ||
1992 | r = unit_fork_helper_process(UNIT(s), "(sd-chown)", &pid); | |
1993 | if (r < 0) | |
1994 | return r; | |
1995 | if (r == 0) { | |
1996 | uid_t uid = UID_INVALID; | |
1997 | gid_t gid = GID_INVALID; | |
1998 | SocketPort *p; | |
1999 | ||
2000 | /* Child */ | |
2001 | ||
2002 | if (!isempty(s->user)) { | |
2003 | const char *user = s->user; | |
2004 | ||
2005 | r = get_user_creds(&user, &uid, &gid, NULL, NULL, 0); | |
2006 | if (r < 0) { | |
2007 | log_unit_error_errno(UNIT(s), r, "Failed to resolve user %s: %m", user); | |
2008 | _exit(EXIT_USER); | |
2009 | } | |
2010 | } | |
2011 | ||
2012 | if (!isempty(s->group)) { | |
2013 | const char *group = s->group; | |
2014 | ||
2015 | r = get_group_creds(&group, &gid, 0); | |
2016 | if (r < 0) { | |
2017 | log_unit_error_errno(UNIT(s), r, "Failed to resolve group %s: %m", group); | |
2018 | _exit(EXIT_GROUP); | |
2019 | } | |
2020 | } | |
2021 | ||
2022 | LIST_FOREACH(port, p, s->ports) { | |
2023 | const char *path = NULL; | |
2024 | ||
2025 | if (p->type == SOCKET_SOCKET) | |
2026 | path = socket_address_get_path(&p->address); | |
2027 | else if (p->type == SOCKET_FIFO) | |
2028 | path = p->path; | |
2029 | ||
2030 | if (!path) | |
2031 | continue; | |
2032 | ||
2033 | if (chown(path, uid, gid) < 0) { | |
2034 | log_unit_error_errno(UNIT(s), errno, "Failed to chown(): %m"); | |
2035 | _exit(EXIT_CHOWN); | |
2036 | } | |
2037 | } | |
2038 | ||
2039 | _exit(EXIT_SUCCESS); | |
2040 | } | |
2041 | ||
2042 | r = unit_watch_pid(UNIT(s), pid, true); | |
2043 | if (r < 0) | |
2044 | goto fail; | |
2045 | ||
2046 | *_pid = pid; | |
2047 | return 0; | |
2048 | ||
2049 | fail: | |
2050 | s->timer_event_source = sd_event_source_disable_unref(s->timer_event_source); | |
2051 | return r; | |
2052 | } | |
2053 | ||
2054 | static void socket_enter_dead(Socket *s, SocketResult f) { | |
2055 | assert(s); | |
2056 | ||
2057 | if (s->result == SOCKET_SUCCESS) | |
2058 | s->result = f; | |
2059 | ||
2060 | if (s->result == SOCKET_SUCCESS) | |
2061 | unit_log_success(UNIT(s)); | |
2062 | else | |
2063 | unit_log_failure(UNIT(s), socket_result_to_string(s->result)); | |
2064 | ||
2065 | unit_warn_leftover_processes(UNIT(s), unit_log_leftover_process_stop); | |
2066 | ||
2067 | socket_set_state(s, s->result != SOCKET_SUCCESS ? SOCKET_FAILED : SOCKET_DEAD); | |
2068 | ||
2069 | s->exec_runtime = exec_runtime_unref(s->exec_runtime, true); | |
2070 | ||
2071 | unit_destroy_runtime_data(UNIT(s), &s->exec_context); | |
2072 | ||
2073 | unit_unref_uid_gid(UNIT(s), true); | |
2074 | ||
2075 | dynamic_creds_destroy(&s->dynamic_creds); | |
2076 | } | |
2077 | ||
2078 | static void socket_enter_signal(Socket *s, SocketState state, SocketResult f); | |
2079 | ||
2080 | static void socket_enter_stop_post(Socket *s, SocketResult f) { | |
2081 | int r; | |
2082 | assert(s); | |
2083 | ||
2084 | if (s->result == SOCKET_SUCCESS) | |
2085 | s->result = f; | |
2086 | ||
2087 | socket_unwatch_control_pid(s); | |
2088 | s->control_command_id = SOCKET_EXEC_STOP_POST; | |
2089 | s->control_command = s->exec_command[SOCKET_EXEC_STOP_POST]; | |
2090 | ||
2091 | if (s->control_command) { | |
2092 | r = socket_spawn(s, s->control_command, &s->control_pid); | |
2093 | if (r < 0) | |
2094 | goto fail; | |
2095 | ||
2096 | socket_set_state(s, SOCKET_STOP_POST); | |
2097 | } else | |
2098 | socket_enter_signal(s, SOCKET_FINAL_SIGTERM, SOCKET_SUCCESS); | |
2099 | ||
2100 | return; | |
2101 | ||
2102 | fail: | |
2103 | log_unit_warning_errno(UNIT(s), r, "Failed to run 'stop-post' task: %m"); | |
2104 | socket_enter_signal(s, SOCKET_FINAL_SIGTERM, SOCKET_FAILURE_RESOURCES); | |
2105 | } | |
2106 | ||
2107 | static int state_to_kill_operation(Socket *s, SocketState state) { | |
2108 | if (state == SOCKET_STOP_PRE_SIGTERM && unit_has_job_type(UNIT(s), JOB_RESTART)) | |
2109 | return KILL_RESTART; | |
2110 | ||
2111 | if (state == SOCKET_FINAL_SIGTERM) | |
2112 | return KILL_TERMINATE; | |
2113 | ||
2114 | return KILL_KILL; | |
2115 | } | |
2116 | ||
2117 | static void socket_enter_signal(Socket *s, SocketState state, SocketResult f) { | |
2118 | int r; | |
2119 | ||
2120 | assert(s); | |
2121 | ||
2122 | if (s->result == SOCKET_SUCCESS) | |
2123 | s->result = f; | |
2124 | ||
2125 | r = unit_kill_context( | |
2126 | UNIT(s), | |
2127 | &s->kill_context, | |
2128 | state_to_kill_operation(s, state), | |
2129 | -1, | |
2130 | s->control_pid, | |
2131 | false); | |
2132 | if (r < 0) | |
2133 | goto fail; | |
2134 | ||
2135 | if (r > 0) { | |
2136 | r = socket_arm_timer(s, usec_add(now(CLOCK_MONOTONIC), s->timeout_usec)); | |
2137 | if (r < 0) | |
2138 | goto fail; | |
2139 | ||
2140 | socket_set_state(s, state); | |
2141 | } else if (state == SOCKET_STOP_PRE_SIGTERM) | |
2142 | socket_enter_signal(s, SOCKET_STOP_PRE_SIGKILL, SOCKET_SUCCESS); | |
2143 | else if (state == SOCKET_STOP_PRE_SIGKILL) | |
2144 | socket_enter_stop_post(s, SOCKET_SUCCESS); | |
2145 | else if (state == SOCKET_FINAL_SIGTERM) | |
2146 | socket_enter_signal(s, SOCKET_FINAL_SIGKILL, SOCKET_SUCCESS); | |
2147 | else | |
2148 | socket_enter_dead(s, SOCKET_SUCCESS); | |
2149 | ||
2150 | return; | |
2151 | ||
2152 | fail: | |
2153 | log_unit_warning_errno(UNIT(s), r, "Failed to kill processes: %m"); | |
2154 | ||
2155 | if (IN_SET(state, SOCKET_STOP_PRE_SIGTERM, SOCKET_STOP_PRE_SIGKILL)) | |
2156 | socket_enter_stop_post(s, SOCKET_FAILURE_RESOURCES); | |
2157 | else | |
2158 | socket_enter_dead(s, SOCKET_FAILURE_RESOURCES); | |
2159 | } | |
2160 | ||
2161 | static void socket_enter_stop_pre(Socket *s, SocketResult f) { | |
2162 | int r; | |
2163 | assert(s); | |
2164 | ||
2165 | if (s->result == SOCKET_SUCCESS) | |
2166 | s->result = f; | |
2167 | ||
2168 | socket_unwatch_control_pid(s); | |
2169 | s->control_command_id = SOCKET_EXEC_STOP_PRE; | |
2170 | s->control_command = s->exec_command[SOCKET_EXEC_STOP_PRE]; | |
2171 | ||
2172 | if (s->control_command) { | |
2173 | r = socket_spawn(s, s->control_command, &s->control_pid); | |
2174 | if (r < 0) | |
2175 | goto fail; | |
2176 | ||
2177 | socket_set_state(s, SOCKET_STOP_PRE); | |
2178 | } else | |
2179 | socket_enter_stop_post(s, SOCKET_SUCCESS); | |
2180 | ||
2181 | return; | |
2182 | ||
2183 | fail: | |
2184 | log_unit_warning_errno(UNIT(s), r, "Failed to run 'stop-pre' task: %m"); | |
2185 | socket_enter_stop_post(s, SOCKET_FAILURE_RESOURCES); | |
2186 | } | |
2187 | ||
2188 | static void socket_enter_listening(Socket *s) { | |
2189 | int r; | |
2190 | assert(s); | |
2191 | ||
2192 | if (!s->accept && s->flush_pending) { | |
2193 | log_unit_debug(UNIT(s), "Flushing socket before listening."); | |
2194 | flush_ports(s); | |
2195 | } | |
2196 | ||
2197 | r = socket_watch_fds(s); | |
2198 | if (r < 0) { | |
2199 | log_unit_warning_errno(UNIT(s), r, "Failed to watch sockets: %m"); | |
2200 | goto fail; | |
2201 | } | |
2202 | ||
2203 | socket_set_state(s, SOCKET_LISTENING); | |
2204 | return; | |
2205 | ||
2206 | fail: | |
2207 | socket_enter_stop_pre(s, SOCKET_FAILURE_RESOURCES); | |
2208 | } | |
2209 | ||
2210 | static void socket_enter_start_post(Socket *s) { | |
2211 | int r; | |
2212 | assert(s); | |
2213 | ||
2214 | socket_unwatch_control_pid(s); | |
2215 | s->control_command_id = SOCKET_EXEC_START_POST; | |
2216 | s->control_command = s->exec_command[SOCKET_EXEC_START_POST]; | |
2217 | ||
2218 | if (s->control_command) { | |
2219 | r = socket_spawn(s, s->control_command, &s->control_pid); | |
2220 | if (r < 0) { | |
2221 | log_unit_warning_errno(UNIT(s), r, "Failed to run 'start-post' task: %m"); | |
2222 | goto fail; | |
2223 | } | |
2224 | ||
2225 | socket_set_state(s, SOCKET_START_POST); | |
2226 | } else | |
2227 | socket_enter_listening(s); | |
2228 | ||
2229 | return; | |
2230 | ||
2231 | fail: | |
2232 | socket_enter_stop_pre(s, SOCKET_FAILURE_RESOURCES); | |
2233 | } | |
2234 | ||
2235 | static void socket_enter_start_chown(Socket *s) { | |
2236 | int r; | |
2237 | ||
2238 | assert(s); | |
2239 | ||
2240 | r = socket_open_fds(s); | |
2241 | if (r < 0) { | |
2242 | log_unit_warning_errno(UNIT(s), r, "Failed to listen on sockets: %m"); | |
2243 | goto fail; | |
2244 | } | |
2245 | ||
2246 | if (!isempty(s->user) || !isempty(s->group)) { | |
2247 | ||
2248 | socket_unwatch_control_pid(s); | |
2249 | s->control_command_id = SOCKET_EXEC_START_CHOWN; | |
2250 | s->control_command = NULL; | |
2251 | ||
2252 | r = socket_chown(s, &s->control_pid); | |
2253 | if (r < 0) { | |
2254 | log_unit_warning_errno(UNIT(s), r, "Failed to fork 'start-chown' task: %m"); | |
2255 | goto fail; | |
2256 | } | |
2257 | ||
2258 | socket_set_state(s, SOCKET_START_CHOWN); | |
2259 | } else | |
2260 | socket_enter_start_post(s); | |
2261 | ||
2262 | return; | |
2263 | ||
2264 | fail: | |
2265 | socket_enter_stop_pre(s, SOCKET_FAILURE_RESOURCES); | |
2266 | } | |
2267 | ||
2268 | static void socket_enter_start_pre(Socket *s) { | |
2269 | int r; | |
2270 | assert(s); | |
2271 | ||
2272 | socket_unwatch_control_pid(s); | |
2273 | ||
2274 | unit_warn_leftover_processes(UNIT(s), unit_log_leftover_process_start); | |
2275 | ||
2276 | s->control_command_id = SOCKET_EXEC_START_PRE; | |
2277 | s->control_command = s->exec_command[SOCKET_EXEC_START_PRE]; | |
2278 | ||
2279 | if (s->control_command) { | |
2280 | r = socket_spawn(s, s->control_command, &s->control_pid); | |
2281 | if (r < 0) { | |
2282 | log_unit_warning_errno(UNIT(s), r, "Failed to run 'start-pre' task: %m"); | |
2283 | goto fail; | |
2284 | } | |
2285 | ||
2286 | socket_set_state(s, SOCKET_START_PRE); | |
2287 | } else | |
2288 | socket_enter_start_chown(s); | |
2289 | ||
2290 | return; | |
2291 | ||
2292 | fail: | |
2293 | socket_enter_dead(s, SOCKET_FAILURE_RESOURCES); | |
2294 | } | |
2295 | ||
2296 | static void flush_ports(Socket *s) { | |
2297 | SocketPort *p; | |
2298 | ||
2299 | /* Flush all incoming traffic, regardless if actual bytes or new connections, so that this socket isn't busy | |
2300 | * anymore */ | |
2301 | ||
2302 | LIST_FOREACH(port, p, s->ports) { | |
2303 | if (p->fd < 0) | |
2304 | continue; | |
2305 | ||
2306 | (void) flush_accept(p->fd); | |
2307 | (void) flush_fd(p->fd); | |
2308 | } | |
2309 | } | |
2310 | ||
2311 | static void socket_enter_running(Socket *s, int cfd_in) { | |
2312 | /* Note that this call takes possession of the connection fd passed. It either has to assign it | |
2313 | * somewhere or close it. */ | |
2314 | _cleanup_close_ int cfd = cfd_in; | |
2315 | ||
2316 | _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL; | |
2317 | int r; | |
2318 | ||
2319 | assert(s); | |
2320 | ||
2321 | /* We don't take connections anymore if we are supposed to shut down anyway */ | |
2322 | if (unit_stop_pending(UNIT(s))) { | |
2323 | ||
2324 | log_unit_debug(UNIT(s), "Suppressing connection request since unit stop is scheduled."); | |
2325 | ||
2326 | if (cfd >= 0) | |
2327 | goto refuse; | |
2328 | ||
2329 | flush_ports(s); | |
2330 | return; | |
2331 | } | |
2332 | ||
2333 | if (!ratelimit_below(&s->trigger_limit)) { | |
2334 | log_unit_warning(UNIT(s), "Trigger limit hit, refusing further activation."); | |
2335 | socket_enter_stop_pre(s, SOCKET_FAILURE_TRIGGER_LIMIT_HIT); | |
2336 | goto refuse; | |
2337 | } | |
2338 | ||
2339 | if (cfd < 0) { | |
2340 | bool pending = false; | |
2341 | Unit *other; | |
2342 | ||
2343 | /* If there's already a start pending don't bother to do anything */ | |
2344 | UNIT_FOREACH_DEPENDENCY(other, UNIT(s), UNIT_ATOM_TRIGGERS) | |
2345 | if (unit_active_or_pending(other)) { | |
2346 | pending = true; | |
2347 | break; | |
2348 | } | |
2349 | ||
2350 | if (!pending) { | |
2351 | if (!UNIT_ISSET(s->service)) { | |
2352 | r = log_unit_error_errno(UNIT(s), SYNTHETIC_ERRNO(ENOENT), | |
2353 | "Service to activate vanished, refusing activation."); | |
2354 | goto fail; | |
2355 | } | |
2356 | ||
2357 | r = manager_add_job(UNIT(s)->manager, JOB_START, UNIT_DEREF(s->service), JOB_REPLACE, NULL, &error, NULL); | |
2358 | if (r < 0) | |
2359 | goto fail; | |
2360 | } | |
2361 | ||
2362 | socket_set_state(s, SOCKET_RUNNING); | |
2363 | } else { | |
2364 | _cleanup_(socket_peer_unrefp) SocketPeer *p = NULL; | |
2365 | Unit *service; | |
2366 | ||
2367 | if (s->n_connections >= s->max_connections) { | |
2368 | log_unit_warning(UNIT(s), "Too many incoming connections (%u), dropping connection.", | |
2369 | s->n_connections); | |
2370 | goto refuse; | |
2371 | } | |
2372 | ||
2373 | if (s->max_connections_per_source > 0) { | |
2374 | r = socket_acquire_peer(s, cfd, &p); | |
2375 | if (ERRNO_IS_DISCONNECT(r)) | |
2376 | return; | |
2377 | if (r < 0) /* We didn't have enough resources to acquire peer information, let's fail. */ | |
2378 | goto fail; | |
2379 | if (r > 0 && p->n_ref > s->max_connections_per_source) { | |
2380 | _cleanup_free_ char *t = NULL; | |
2381 | ||
2382 | (void) sockaddr_pretty(&p->peer.sa, p->peer_salen, true, false, &t); | |
2383 | ||
2384 | log_unit_warning(UNIT(s), | |
2385 | "Too many incoming connections (%u) from source %s, dropping connection.", | |
2386 | p->n_ref, strnull(t)); | |
2387 | goto refuse; | |
2388 | } | |
2389 | } | |
2390 | ||
2391 | r = socket_load_service_unit(s, cfd, &service); | |
2392 | if (ERRNO_IS_DISCONNECT(r)) | |
2393 | return; | |
2394 | if (r < 0) | |
2395 | goto fail; | |
2396 | ||
2397 | r = unit_add_two_dependencies(UNIT(s), UNIT_BEFORE, UNIT_TRIGGERS, service, | |
2398 | false, UNIT_DEPENDENCY_IMPLICIT); | |
2399 | if (r < 0) | |
2400 | goto fail; | |
2401 | ||
2402 | s->n_accepted++; | |
2403 | ||
2404 | r = service_set_socket_fd(SERVICE(service), cfd, s, s->selinux_context_from_net); | |
2405 | if (ERRNO_IS_DISCONNECT(r)) | |
2406 | return; | |
2407 | if (r < 0) | |
2408 | goto fail; | |
2409 | ||
2410 | TAKE_FD(cfd); /* We passed ownership of the fd to the service now. Forget it here. */ | |
2411 | s->n_connections++; | |
2412 | ||
2413 | SERVICE(service)->peer = TAKE_PTR(p); /* Pass ownership of the peer reference */ | |
2414 | ||
2415 | r = manager_add_job(UNIT(s)->manager, JOB_START, service, JOB_REPLACE, NULL, &error, NULL); | |
2416 | if (r < 0) { | |
2417 | /* We failed to activate the new service, but it still exists. Let's make sure the | |
2418 | * service closes and forgets the connection fd again, immediately. */ | |
2419 | service_close_socket_fd(SERVICE(service)); | |
2420 | goto fail; | |
2421 | } | |
2422 | ||
2423 | /* Notify clients about changed counters */ | |
2424 | unit_add_to_dbus_queue(UNIT(s)); | |
2425 | } | |
2426 | ||
2427 | TAKE_FD(cfd); | |
2428 | return; | |
2429 | ||
2430 | refuse: | |
2431 | s->n_refused++; | |
2432 | return; | |
2433 | ||
2434 | fail: | |
2435 | if (ERRNO_IS_RESOURCE(r)) | |
2436 | log_unit_warning(UNIT(s), "Failed to queue service startup job: %s", | |
2437 | bus_error_message(&error, r)); | |
2438 | else | |
2439 | log_unit_warning(UNIT(s), "Failed to queue service startup job (Maybe the service file is missing or not a %s unit?): %s", | |
2440 | cfd >= 0 ? "template" : "non-template", | |
2441 | bus_error_message(&error, r)); | |
2442 | ||
2443 | socket_enter_stop_pre(s, SOCKET_FAILURE_RESOURCES); | |
2444 | } | |
2445 | ||
2446 | static void socket_run_next(Socket *s) { | |
2447 | int r; | |
2448 | ||
2449 | assert(s); | |
2450 | assert(s->control_command); | |
2451 | assert(s->control_command->command_next); | |
2452 | ||
2453 | socket_unwatch_control_pid(s); | |
2454 | ||
2455 | s->control_command = s->control_command->command_next; | |
2456 | ||
2457 | r = socket_spawn(s, s->control_command, &s->control_pid); | |
2458 | if (r < 0) | |
2459 | goto fail; | |
2460 | ||
2461 | return; | |
2462 | ||
2463 | fail: | |
2464 | log_unit_warning_errno(UNIT(s), r, "Failed to run next task: %m"); | |
2465 | ||
2466 | if (s->state == SOCKET_START_POST) | |
2467 | socket_enter_stop_pre(s, SOCKET_FAILURE_RESOURCES); | |
2468 | else if (s->state == SOCKET_STOP_POST) | |
2469 | socket_enter_dead(s, SOCKET_FAILURE_RESOURCES); | |
2470 | else | |
2471 | socket_enter_signal(s, SOCKET_FINAL_SIGTERM, SOCKET_FAILURE_RESOURCES); | |
2472 | } | |
2473 | ||
2474 | static int socket_start(Unit *u) { | |
2475 | Socket *s = SOCKET(u); | |
2476 | int r; | |
2477 | ||
2478 | assert(s); | |
2479 | ||
2480 | /* We cannot fulfill this request right now, try again later | |
2481 | * please! */ | |
2482 | if (IN_SET(s->state, | |
2483 | SOCKET_STOP_PRE, | |
2484 | SOCKET_STOP_PRE_SIGKILL, | |
2485 | SOCKET_STOP_PRE_SIGTERM, | |
2486 | SOCKET_STOP_POST, | |
2487 | SOCKET_FINAL_SIGTERM, | |
2488 | SOCKET_FINAL_SIGKILL, | |
2489 | SOCKET_CLEANING)) | |
2490 | return -EAGAIN; | |
2491 | ||
2492 | /* Already on it! */ | |
2493 | if (IN_SET(s->state, | |
2494 | SOCKET_START_PRE, | |
2495 | SOCKET_START_CHOWN, | |
2496 | SOCKET_START_POST)) | |
2497 | return 0; | |
2498 | ||
2499 | /* Cannot run this without the service being around */ | |
2500 | if (UNIT_ISSET(s->service)) { | |
2501 | Service *service; | |
2502 | ||
2503 | service = SERVICE(UNIT_DEREF(s->service)); | |
2504 | ||
2505 | if (UNIT(service)->load_state != UNIT_LOADED) | |
2506 | return log_unit_error_errno(u, SYNTHETIC_ERRNO(ENOENT), "Socket service %s not loaded, refusing.", UNIT(service)->id); | |
2507 | ||
2508 | /* If the service is already active we cannot start the | |
2509 | * socket */ | |
2510 | if (!IN_SET(service->state, SERVICE_DEAD, SERVICE_FAILED, SERVICE_AUTO_RESTART)) | |
2511 | return log_unit_error_errno(u, SYNTHETIC_ERRNO(EBUSY), "Socket service %s already active, refusing.", UNIT(service)->id); | |
2512 | } | |
2513 | ||
2514 | assert(IN_SET(s->state, SOCKET_DEAD, SOCKET_FAILED)); | |
2515 | ||
2516 | r = unit_test_start_limit(u); | |
2517 | if (r < 0) { | |
2518 | socket_enter_dead(s, SOCKET_FAILURE_START_LIMIT_HIT); | |
2519 | return r; | |
2520 | } | |
2521 | ||
2522 | r = unit_acquire_invocation_id(u); | |
2523 | if (r < 0) | |
2524 | return r; | |
2525 | ||
2526 | s->result = SOCKET_SUCCESS; | |
2527 | exec_command_reset_status_list_array(s->exec_command, _SOCKET_EXEC_COMMAND_MAX); | |
2528 | ||
2529 | u->reset_accounting = true; | |
2530 | ||
2531 | socket_enter_start_pre(s); | |
2532 | return 1; | |
2533 | } | |
2534 | ||
2535 | static int socket_stop(Unit *u) { | |
2536 | Socket *s = SOCKET(u); | |
2537 | ||
2538 | assert(s); | |
2539 | ||
2540 | /* Already on it */ | |
2541 | if (IN_SET(s->state, | |
2542 | SOCKET_STOP_PRE, | |
2543 | SOCKET_STOP_PRE_SIGTERM, | |
2544 | SOCKET_STOP_PRE_SIGKILL, | |
2545 | SOCKET_STOP_POST, | |
2546 | SOCKET_FINAL_SIGTERM, | |
2547 | SOCKET_FINAL_SIGKILL)) | |
2548 | return 0; | |
2549 | ||
2550 | /* If there's already something running we go directly into | |
2551 | * kill mode. */ | |
2552 | if (IN_SET(s->state, | |
2553 | SOCKET_START_PRE, | |
2554 | SOCKET_START_CHOWN, | |
2555 | SOCKET_START_POST)) { | |
2556 | socket_enter_signal(s, SOCKET_STOP_PRE_SIGTERM, SOCKET_SUCCESS); | |
2557 | return -EAGAIN; | |
2558 | } | |
2559 | ||
2560 | /* If we are currently cleaning, then abort it, brutally. */ | |
2561 | if (s->state == SOCKET_CLEANING) { | |
2562 | socket_enter_signal(s, SOCKET_FINAL_SIGKILL, SOCKET_SUCCESS); | |
2563 | return 0; | |
2564 | } | |
2565 | ||
2566 | assert(IN_SET(s->state, SOCKET_LISTENING, SOCKET_RUNNING)); | |
2567 | ||
2568 | socket_enter_stop_pre(s, SOCKET_SUCCESS); | |
2569 | return 1; | |
2570 | } | |
2571 | ||
2572 | static int socket_serialize(Unit *u, FILE *f, FDSet *fds) { | |
2573 | Socket *s = SOCKET(u); | |
2574 | SocketPort *p; | |
2575 | int r; | |
2576 | ||
2577 | assert(u); | |
2578 | assert(f); | |
2579 | assert(fds); | |
2580 | ||
2581 | (void) serialize_item(f, "state", socket_state_to_string(s->state)); | |
2582 | (void) serialize_item(f, "result", socket_result_to_string(s->result)); | |
2583 | (void) serialize_item_format(f, "n-accepted", "%u", s->n_accepted); | |
2584 | (void) serialize_item_format(f, "n-refused", "%u", s->n_refused); | |
2585 | ||
2586 | if (s->control_pid > 0) | |
2587 | (void) serialize_item_format(f, "control-pid", PID_FMT, s->control_pid); | |
2588 | ||
2589 | if (s->control_command_id >= 0) | |
2590 | (void) serialize_item(f, "control-command", socket_exec_command_to_string(s->control_command_id)); | |
2591 | ||
2592 | LIST_FOREACH(port, p, s->ports) { | |
2593 | int copy; | |
2594 | ||
2595 | if (p->fd < 0) | |
2596 | continue; | |
2597 | ||
2598 | copy = fdset_put_dup(fds, p->fd); | |
2599 | if (copy < 0) | |
2600 | return log_unit_warning_errno(u, copy, "Failed to serialize socket fd: %m"); | |
2601 | ||
2602 | if (p->type == SOCKET_SOCKET) { | |
2603 | _cleanup_free_ char *t = NULL; | |
2604 | ||
2605 | r = socket_address_print(&p->address, &t); | |
2606 | if (r < 0) | |
2607 | return log_unit_error_errno(u, r, "Failed to format socket address: %m"); | |
2608 | ||
2609 | if (socket_address_family(&p->address) == AF_NETLINK) | |
2610 | (void) serialize_item_format(f, "netlink", "%i %s", copy, t); | |
2611 | else | |
2612 | (void) serialize_item_format(f, "socket", "%i %i %s", copy, p->address.type, t); | |
2613 | } else if (p->type == SOCKET_SPECIAL) | |
2614 | (void) serialize_item_format(f, "special", "%i %s", copy, p->path); | |
2615 | else if (p->type == SOCKET_MQUEUE) | |
2616 | (void) serialize_item_format(f, "mqueue", "%i %s", copy, p->path); | |
2617 | else if (p->type == SOCKET_USB_FUNCTION) | |
2618 | (void) serialize_item_format(f, "ffs", "%i %s", copy, p->path); | |
2619 | else { | |
2620 | assert(p->type == SOCKET_FIFO); | |
2621 | (void) serialize_item_format(f, "fifo", "%i %s", copy, p->path); | |
2622 | } | |
2623 | } | |
2624 | ||
2625 | return 0; | |
2626 | } | |
2627 | ||
2628 | static int socket_deserialize_item(Unit *u, const char *key, const char *value, FDSet *fds) { | |
2629 | Socket *s = SOCKET(u); | |
2630 | ||
2631 | assert(u); | |
2632 | assert(key); | |
2633 | assert(value); | |
2634 | ||
2635 | if (streq(key, "state")) { | |
2636 | SocketState state; | |
2637 | ||
2638 | state = socket_state_from_string(value); | |
2639 | if (state < 0) | |
2640 | log_unit_debug(u, "Failed to parse state value: %s", value); | |
2641 | else | |
2642 | s->deserialized_state = state; | |
2643 | } else if (streq(key, "result")) { | |
2644 | SocketResult f; | |
2645 | ||
2646 | f = socket_result_from_string(value); | |
2647 | if (f < 0) | |
2648 | log_unit_debug(u, "Failed to parse result value: %s", value); | |
2649 | else if (f != SOCKET_SUCCESS) | |
2650 | s->result = f; | |
2651 | ||
2652 | } else if (streq(key, "n-accepted")) { | |
2653 | unsigned k; | |
2654 | ||
2655 | if (safe_atou(value, &k) < 0) | |
2656 | log_unit_debug(u, "Failed to parse n-accepted value: %s", value); | |
2657 | else | |
2658 | s->n_accepted += k; | |
2659 | } else if (streq(key, "n-refused")) { | |
2660 | unsigned k; | |
2661 | ||
2662 | if (safe_atou(value, &k) < 0) | |
2663 | log_unit_debug(u, "Failed to parse n-refused value: %s", value); | |
2664 | else | |
2665 | s->n_refused += k; | |
2666 | } else if (streq(key, "control-pid")) { | |
2667 | pid_t pid; | |
2668 | ||
2669 | if (parse_pid(value, &pid) < 0) | |
2670 | log_unit_debug(u, "Failed to parse control-pid value: %s", value); | |
2671 | else | |
2672 | s->control_pid = pid; | |
2673 | } else if (streq(key, "control-command")) { | |
2674 | SocketExecCommand id; | |
2675 | ||
2676 | id = socket_exec_command_from_string(value); | |
2677 | if (id < 0) | |
2678 | log_unit_debug(u, "Failed to parse exec-command value: %s", value); | |
2679 | else { | |
2680 | s->control_command_id = id; | |
2681 | s->control_command = s->exec_command[id]; | |
2682 | } | |
2683 | } else if (streq(key, "fifo")) { | |
2684 | int fd, skip = 0; | |
2685 | SocketPort *p; | |
2686 | ||
2687 | if (sscanf(value, "%i %n", &fd, &skip) < 1 || fd < 0 || !fdset_contains(fds, fd)) | |
2688 | log_unit_debug(u, "Failed to parse fifo value: %s", value); | |
2689 | else { | |
2690 | bool found = false; | |
2691 | ||
2692 | LIST_FOREACH(port, p, s->ports) | |
2693 | if (p->fd < 0 && | |
2694 | p->type == SOCKET_FIFO && | |
2695 | path_equal_or_files_same(p->path, value+skip, 0)) { | |
2696 | p->fd = fdset_remove(fds, fd); | |
2697 | found = true; | |
2698 | break; | |
2699 | } | |
2700 | if (!found) | |
2701 | log_unit_debug(u, "No matching fifo socket found: %s", value+skip); | |
2702 | } | |
2703 | ||
2704 | } else if (streq(key, "special")) { | |
2705 | int fd, skip = 0; | |
2706 | SocketPort *p; | |
2707 | ||
2708 | if (sscanf(value, "%i %n", &fd, &skip) < 1 || fd < 0 || !fdset_contains(fds, fd)) | |
2709 | log_unit_debug(u, "Failed to parse special value: %s", value); | |
2710 | else { | |
2711 | bool found = false; | |
2712 | ||
2713 | LIST_FOREACH(port, p, s->ports) | |
2714 | if (p->fd < 0 && | |
2715 | p->type == SOCKET_SPECIAL && | |
2716 | path_equal_or_files_same(p->path, value+skip, 0)) { | |
2717 | p->fd = fdset_remove(fds, fd); | |
2718 | found = true; | |
2719 | break; | |
2720 | } | |
2721 | if (!found) | |
2722 | log_unit_debug(u, "No matching special socket found: %s", value+skip); | |
2723 | } | |
2724 | ||
2725 | } else if (streq(key, "mqueue")) { | |
2726 | int fd, skip = 0; | |
2727 | SocketPort *p; | |
2728 | ||
2729 | if (sscanf(value, "%i %n", &fd, &skip) < 1 || fd < 0 || !fdset_contains(fds, fd)) | |
2730 | log_unit_debug(u, "Failed to parse mqueue value: %s", value); | |
2731 | else { | |
2732 | bool found = false; | |
2733 | ||
2734 | LIST_FOREACH(port, p, s->ports) | |
2735 | if (p->fd < 0 && | |
2736 | p->type == SOCKET_MQUEUE && | |
2737 | streq(p->path, value+skip)) { | |
2738 | p->fd = fdset_remove(fds, fd); | |
2739 | found = true; | |
2740 | break; | |
2741 | } | |
2742 | if (!found) | |
2743 | log_unit_debug(u, "No matching mqueue socket found: %s", value+skip); | |
2744 | } | |
2745 | ||
2746 | } else if (streq(key, "socket")) { | |
2747 | int fd, type, skip = 0; | |
2748 | SocketPort *p; | |
2749 | ||
2750 | if (sscanf(value, "%i %i %n", &fd, &type, &skip) < 2 || fd < 0 || type < 0 || !fdset_contains(fds, fd)) | |
2751 | log_unit_debug(u, "Failed to parse socket value: %s", value); | |
2752 | else { | |
2753 | bool found = false; | |
2754 | ||
2755 | LIST_FOREACH(port, p, s->ports) | |
2756 | if (p->fd < 0 && | |
2757 | socket_address_is(&p->address, value+skip, type)) { | |
2758 | p->fd = fdset_remove(fds, fd); | |
2759 | found = true; | |
2760 | break; | |
2761 | } | |
2762 | if (!found) | |
2763 | log_unit_debug(u, "No matching %s socket found: %s", | |
2764 | socket_address_type_to_string(type), value+skip); | |
2765 | } | |
2766 | ||
2767 | } else if (streq(key, "netlink")) { | |
2768 | int fd, skip = 0; | |
2769 | SocketPort *p; | |
2770 | ||
2771 | if (sscanf(value, "%i %n", &fd, &skip) < 1 || fd < 0 || !fdset_contains(fds, fd)) | |
2772 | log_unit_debug(u, "Failed to parse socket value: %s", value); | |
2773 | else { | |
2774 | bool found = false; | |
2775 | ||
2776 | LIST_FOREACH(port, p, s->ports) | |
2777 | if (p->fd < 0 && | |
2778 | socket_address_is_netlink(&p->address, value+skip)) { | |
2779 | p->fd = fdset_remove(fds, fd); | |
2780 | found = true; | |
2781 | break; | |
2782 | } | |
2783 | if (!found) | |
2784 | log_unit_debug(u, "No matching netlink socket found: %s", value+skip); | |
2785 | } | |
2786 | ||
2787 | } else if (streq(key, "ffs")) { | |
2788 | int fd, skip = 0; | |
2789 | SocketPort *p; | |
2790 | ||
2791 | if (sscanf(value, "%i %n", &fd, &skip) < 1 || fd < 0 || !fdset_contains(fds, fd)) | |
2792 | log_unit_debug(u, "Failed to parse ffs value: %s", value); | |
2793 | else { | |
2794 | bool found = false; | |
2795 | ||
2796 | LIST_FOREACH(port, p, s->ports) | |
2797 | if (p->fd < 0 && | |
2798 | p->type == SOCKET_USB_FUNCTION && | |
2799 | path_equal_or_files_same(p->path, value+skip, 0)) { | |
2800 | p->fd = fdset_remove(fds, fd); | |
2801 | found = true; | |
2802 | break; | |
2803 | } | |
2804 | if (!found) | |
2805 | log_unit_debug(u, "No matching ffs socket found: %s", value+skip); | |
2806 | } | |
2807 | ||
2808 | } else | |
2809 | log_unit_debug(UNIT(s), "Unknown serialization key: %s", key); | |
2810 | ||
2811 | return 0; | |
2812 | } | |
2813 | ||
2814 | static void socket_distribute_fds(Unit *u, FDSet *fds) { | |
2815 | Socket *s = SOCKET(u); | |
2816 | SocketPort *p; | |
2817 | ||
2818 | assert(u); | |
2819 | ||
2820 | LIST_FOREACH(port, p, s->ports) { | |
2821 | int fd; | |
2822 | ||
2823 | if (p->type != SOCKET_SOCKET) | |
2824 | continue; | |
2825 | ||
2826 | if (p->fd >= 0) | |
2827 | continue; | |
2828 | ||
2829 | FDSET_FOREACH(fd, fds) { | |
2830 | if (socket_address_matches_fd(&p->address, fd)) { | |
2831 | p->fd = fdset_remove(fds, fd); | |
2832 | s->deserialized_state = SOCKET_LISTENING; | |
2833 | break; | |
2834 | } | |
2835 | } | |
2836 | } | |
2837 | } | |
2838 | ||
2839 | _pure_ static UnitActiveState socket_active_state(Unit *u) { | |
2840 | assert(u); | |
2841 | ||
2842 | return state_translation_table[SOCKET(u)->state]; | |
2843 | } | |
2844 | ||
2845 | _pure_ static const char *socket_sub_state_to_string(Unit *u) { | |
2846 | assert(u); | |
2847 | ||
2848 | return socket_state_to_string(SOCKET(u)->state); | |
2849 | } | |
2850 | ||
2851 | const char* socket_port_type_to_string(SocketPort *p) { | |
2852 | ||
2853 | assert(p); | |
2854 | ||
2855 | switch (p->type) { | |
2856 | ||
2857 | case SOCKET_SOCKET: | |
2858 | ||
2859 | switch (p->address.type) { | |
2860 | ||
2861 | case SOCK_STREAM: | |
2862 | return "Stream"; | |
2863 | ||
2864 | case SOCK_DGRAM: | |
2865 | return "Datagram"; | |
2866 | ||
2867 | case SOCK_SEQPACKET: | |
2868 | return "SequentialPacket"; | |
2869 | ||
2870 | case SOCK_RAW: | |
2871 | if (socket_address_family(&p->address) == AF_NETLINK) | |
2872 | return "Netlink"; | |
2873 | ||
2874 | _fallthrough_; | |
2875 | default: | |
2876 | return NULL; | |
2877 | } | |
2878 | ||
2879 | case SOCKET_SPECIAL: | |
2880 | return "Special"; | |
2881 | ||
2882 | case SOCKET_MQUEUE: | |
2883 | return "MessageQueue"; | |
2884 | ||
2885 | case SOCKET_FIFO: | |
2886 | return "FIFO"; | |
2887 | ||
2888 | case SOCKET_USB_FUNCTION: | |
2889 | return "USBFunction"; | |
2890 | ||
2891 | default: | |
2892 | return NULL; | |
2893 | } | |
2894 | } | |
2895 | ||
2896 | SocketType socket_port_type_from_string(const char *s) { | |
2897 | assert(s); | |
2898 | ||
2899 | if (STR_IN_SET(s, "Stream", "Datagram", "SequentialPacket", "Netlink")) | |
2900 | return SOCKET_SOCKET; | |
2901 | else if (streq(s, "Special")) | |
2902 | return SOCKET_SPECIAL; | |
2903 | else if (streq(s, "MessageQueue")) | |
2904 | return SOCKET_MQUEUE; | |
2905 | else if (streq(s, "FIFO")) | |
2906 | return SOCKET_FIFO; | |
2907 | else if (streq(s, "USBFunction")) | |
2908 | return SOCKET_USB_FUNCTION; | |
2909 | else | |
2910 | return _SOCKET_TYPE_INVALID; | |
2911 | } | |
2912 | ||
2913 | _pure_ static bool socket_may_gc(Unit *u) { | |
2914 | Socket *s = SOCKET(u); | |
2915 | ||
2916 | assert(u); | |
2917 | ||
2918 | return s->n_connections == 0; | |
2919 | } | |
2920 | ||
2921 | static int socket_accept_do(Socket *s, int fd) { | |
2922 | int cfd; | |
2923 | ||
2924 | assert(s); | |
2925 | assert(fd >= 0); | |
2926 | ||
2927 | cfd = accept4(fd, NULL, NULL, SOCK_NONBLOCK|SOCK_CLOEXEC); | |
2928 | if (cfd < 0) | |
2929 | /* Convert transient network errors into clean and well-defined EAGAIN */ | |
2930 | return ERRNO_IS_ACCEPT_AGAIN(errno) ? -EAGAIN : -errno; | |
2931 | ||
2932 | return cfd; | |
2933 | } | |
2934 | ||
2935 | static int socket_accept_in_cgroup(Socket *s, SocketPort *p, int fd) { | |
2936 | _cleanup_close_pair_ int pair[2] = { -1, -1 }; | |
2937 | int cfd, r; | |
2938 | pid_t pid; | |
2939 | ||
2940 | assert(s); | |
2941 | assert(p); | |
2942 | assert(fd >= 0); | |
2943 | ||
2944 | /* Similar to socket_address_listen_in_cgroup(), but for accept() rather than socket(): make sure that any | |
2945 | * connection socket is also properly associated with the cgroup. */ | |
2946 | ||
2947 | if (!IN_SET(p->address.sockaddr.sa.sa_family, AF_INET, AF_INET6)) | |
2948 | goto shortcut; | |
2949 | ||
2950 | r = bpf_firewall_supported(); | |
2951 | if (r < 0) | |
2952 | return r; | |
2953 | if (r == BPF_FIREWALL_UNSUPPORTED) | |
2954 | goto shortcut; | |
2955 | ||
2956 | if (socketpair(AF_UNIX, SOCK_SEQPACKET|SOCK_CLOEXEC, 0, pair) < 0) | |
2957 | return log_unit_error_errno(UNIT(s), errno, "Failed to create communication channel: %m"); | |
2958 | ||
2959 | r = unit_fork_helper_process(UNIT(s), "(sd-accept)", &pid); | |
2960 | if (r < 0) | |
2961 | return log_unit_error_errno(UNIT(s), r, "Failed to fork off accept stub process: %m"); | |
2962 | if (r == 0) { | |
2963 | /* Child */ | |
2964 | ||
2965 | pair[0] = safe_close(pair[0]); | |
2966 | ||
2967 | cfd = socket_accept_do(s, fd); | |
2968 | if (cfd == -EAGAIN) /* spurious accept() */ | |
2969 | _exit(EXIT_SUCCESS); | |
2970 | if (cfd < 0) { | |
2971 | log_unit_error_errno(UNIT(s), cfd, "Failed to accept connection socket: %m"); | |
2972 | _exit(EXIT_FAILURE); | |
2973 | } | |
2974 | ||
2975 | r = send_one_fd(pair[1], cfd, 0); | |
2976 | if (r < 0) { | |
2977 | log_unit_error_errno(UNIT(s), r, "Failed to send connection socket to parent: %m"); | |
2978 | _exit(EXIT_FAILURE); | |
2979 | } | |
2980 | ||
2981 | _exit(EXIT_SUCCESS); | |
2982 | } | |
2983 | ||
2984 | pair[1] = safe_close(pair[1]); | |
2985 | cfd = receive_one_fd(pair[0], 0); | |
2986 | ||
2987 | /* We synchronously wait for the helper, as it shouldn't be slow */ | |
2988 | r = wait_for_terminate_and_check("(sd-accept)", pid, WAIT_LOG_ABNORMAL); | |
2989 | if (r < 0) { | |
2990 | safe_close(cfd); | |
2991 | return r; | |
2992 | } | |
2993 | ||
2994 | /* If we received no fd, we got EIO here. If this happens with a process exit code of EXIT_SUCCESS | |
2995 | * this is a spurious accept(), let's convert that back to EAGAIN here. */ | |
2996 | if (cfd == -EIO) | |
2997 | return -EAGAIN; | |
2998 | if (cfd < 0) | |
2999 | return log_unit_error_errno(UNIT(s), cfd, "Failed to receive connection socket: %m"); | |
3000 | ||
3001 | return cfd; | |
3002 | ||
3003 | shortcut: | |
3004 | cfd = socket_accept_do(s, fd); | |
3005 | if (cfd == -EAGAIN) /* spurious accept(), skip it silently */ | |
3006 | return -EAGAIN; | |
3007 | if (cfd < 0) | |
3008 | return log_unit_error_errno(UNIT(s), cfd, "Failed to accept connection socket: %m"); | |
3009 | ||
3010 | return cfd; | |
3011 | } | |
3012 | ||
3013 | static int socket_dispatch_io(sd_event_source *source, int fd, uint32_t revents, void *userdata) { | |
3014 | SocketPort *p = userdata; | |
3015 | int cfd = -1; | |
3016 | ||
3017 | assert(p); | |
3018 | assert(fd >= 0); | |
3019 | ||
3020 | if (p->socket->state != SOCKET_LISTENING) | |
3021 | return 0; | |
3022 | ||
3023 | log_unit_debug(UNIT(p->socket), "Incoming traffic"); | |
3024 | ||
3025 | if (revents != EPOLLIN) { | |
3026 | if (revents & EPOLLHUP) | |
3027 | 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."); | |
3028 | else | |
3029 | log_unit_error(UNIT(p->socket), "Got unexpected poll event (0x%x) on socket.", revents); | |
3030 | goto fail; | |
3031 | } | |
3032 | ||
3033 | if (p->socket->accept && | |
3034 | p->type == SOCKET_SOCKET && | |
3035 | socket_address_can_accept(&p->address)) { | |
3036 | ||
3037 | cfd = socket_accept_in_cgroup(p->socket, p, fd); | |
3038 | if (cfd == -EAGAIN) /* Spurious accept() */ | |
3039 | return 0; | |
3040 | if (cfd < 0) | |
3041 | goto fail; | |
3042 | ||
3043 | socket_apply_socket_options(p->socket, p, cfd); | |
3044 | } | |
3045 | ||
3046 | socket_enter_running(p->socket, cfd); | |
3047 | return 0; | |
3048 | ||
3049 | fail: | |
3050 | socket_enter_stop_pre(p->socket, SOCKET_FAILURE_RESOURCES); | |
3051 | return 0; | |
3052 | } | |
3053 | ||
3054 | static void socket_sigchld_event(Unit *u, pid_t pid, int code, int status) { | |
3055 | Socket *s = SOCKET(u); | |
3056 | SocketResult f; | |
3057 | ||
3058 | assert(s); | |
3059 | assert(pid >= 0); | |
3060 | ||
3061 | if (pid != s->control_pid) | |
3062 | return; | |
3063 | ||
3064 | s->control_pid = 0; | |
3065 | ||
3066 | if (is_clean_exit(code, status, EXIT_CLEAN_COMMAND, NULL)) | |
3067 | f = SOCKET_SUCCESS; | |
3068 | else if (code == CLD_EXITED) | |
3069 | f = SOCKET_FAILURE_EXIT_CODE; | |
3070 | else if (code == CLD_KILLED) | |
3071 | f = SOCKET_FAILURE_SIGNAL; | |
3072 | else if (code == CLD_DUMPED) | |
3073 | f = SOCKET_FAILURE_CORE_DUMP; | |
3074 | else | |
3075 | assert_not_reached("Unknown sigchld code"); | |
3076 | ||
3077 | if (s->control_command) { | |
3078 | exec_status_exit(&s->control_command->exec_status, &s->exec_context, pid, code, status); | |
3079 | ||
3080 | if (s->control_command->flags & EXEC_COMMAND_IGNORE_FAILURE) | |
3081 | f = SOCKET_SUCCESS; | |
3082 | } | |
3083 | ||
3084 | unit_log_process_exit( | |
3085 | u, | |
3086 | "Control process", | |
3087 | socket_exec_command_to_string(s->control_command_id), | |
3088 | f == SOCKET_SUCCESS, | |
3089 | code, status); | |
3090 | ||
3091 | if (s->result == SOCKET_SUCCESS) | |
3092 | s->result = f; | |
3093 | ||
3094 | if (s->control_command && | |
3095 | s->control_command->command_next && | |
3096 | f == SOCKET_SUCCESS) { | |
3097 | ||
3098 | log_unit_debug(u, "Running next command for state %s", socket_state_to_string(s->state)); | |
3099 | socket_run_next(s); | |
3100 | } else { | |
3101 | s->control_command = NULL; | |
3102 | s->control_command_id = _SOCKET_EXEC_COMMAND_INVALID; | |
3103 | ||
3104 | /* No further commands for this step, so let's figure | |
3105 | * out what to do next */ | |
3106 | ||
3107 | log_unit_debug(u, "Got final SIGCHLD for state %s", socket_state_to_string(s->state)); | |
3108 | ||
3109 | switch (s->state) { | |
3110 | ||
3111 | case SOCKET_START_PRE: | |
3112 | if (f == SOCKET_SUCCESS) | |
3113 | socket_enter_start_chown(s); | |
3114 | else | |
3115 | socket_enter_signal(s, SOCKET_FINAL_SIGTERM, f); | |
3116 | break; | |
3117 | ||
3118 | case SOCKET_START_CHOWN: | |
3119 | if (f == SOCKET_SUCCESS) | |
3120 | socket_enter_start_post(s); | |
3121 | else | |
3122 | socket_enter_stop_pre(s, f); | |
3123 | break; | |
3124 | ||
3125 | case SOCKET_START_POST: | |
3126 | if (f == SOCKET_SUCCESS) | |
3127 | socket_enter_listening(s); | |
3128 | else | |
3129 | socket_enter_stop_pre(s, f); | |
3130 | break; | |
3131 | ||
3132 | case SOCKET_STOP_PRE: | |
3133 | case SOCKET_STOP_PRE_SIGTERM: | |
3134 | case SOCKET_STOP_PRE_SIGKILL: | |
3135 | socket_enter_stop_post(s, f); | |
3136 | break; | |
3137 | ||
3138 | case SOCKET_STOP_POST: | |
3139 | case SOCKET_FINAL_SIGTERM: | |
3140 | case SOCKET_FINAL_SIGKILL: | |
3141 | socket_enter_dead(s, f); | |
3142 | break; | |
3143 | ||
3144 | case SOCKET_CLEANING: | |
3145 | ||
3146 | if (s->clean_result == SOCKET_SUCCESS) | |
3147 | s->clean_result = f; | |
3148 | ||
3149 | socket_enter_dead(s, SOCKET_SUCCESS); | |
3150 | break; | |
3151 | ||
3152 | default: | |
3153 | assert_not_reached("Uh, control process died at wrong time."); | |
3154 | } | |
3155 | } | |
3156 | ||
3157 | /* Notify clients about changed exit status */ | |
3158 | unit_add_to_dbus_queue(u); | |
3159 | } | |
3160 | ||
3161 | static int socket_dispatch_timer(sd_event_source *source, usec_t usec, void *userdata) { | |
3162 | Socket *s = SOCKET(userdata); | |
3163 | ||
3164 | assert(s); | |
3165 | assert(s->timer_event_source == source); | |
3166 | ||
3167 | switch (s->state) { | |
3168 | ||
3169 | case SOCKET_START_PRE: | |
3170 | log_unit_warning(UNIT(s), "Starting timed out. Terminating."); | |
3171 | socket_enter_signal(s, SOCKET_FINAL_SIGTERM, SOCKET_FAILURE_TIMEOUT); | |
3172 | break; | |
3173 | ||
3174 | case SOCKET_START_CHOWN: | |
3175 | case SOCKET_START_POST: | |
3176 | log_unit_warning(UNIT(s), "Starting timed out. Stopping."); | |
3177 | socket_enter_stop_pre(s, SOCKET_FAILURE_TIMEOUT); | |
3178 | break; | |
3179 | ||
3180 | case SOCKET_STOP_PRE: | |
3181 | log_unit_warning(UNIT(s), "Stopping timed out. Terminating."); | |
3182 | socket_enter_signal(s, SOCKET_STOP_PRE_SIGTERM, SOCKET_FAILURE_TIMEOUT); | |
3183 | break; | |
3184 | ||
3185 | case SOCKET_STOP_PRE_SIGTERM: | |
3186 | if (s->kill_context.send_sigkill) { | |
3187 | log_unit_warning(UNIT(s), "Stopping timed out. Killing."); | |
3188 | socket_enter_signal(s, SOCKET_STOP_PRE_SIGKILL, SOCKET_FAILURE_TIMEOUT); | |
3189 | } else { | |
3190 | log_unit_warning(UNIT(s), "Stopping timed out. Skipping SIGKILL. Ignoring."); | |
3191 | socket_enter_stop_post(s, SOCKET_FAILURE_TIMEOUT); | |
3192 | } | |
3193 | break; | |
3194 | ||
3195 | case SOCKET_STOP_PRE_SIGKILL: | |
3196 | log_unit_warning(UNIT(s), "Processes still around after SIGKILL. Ignoring."); | |
3197 | socket_enter_stop_post(s, SOCKET_FAILURE_TIMEOUT); | |
3198 | break; | |
3199 | ||
3200 | case SOCKET_STOP_POST: | |
3201 | log_unit_warning(UNIT(s), "Stopping timed out (2). Terminating."); | |
3202 | socket_enter_signal(s, SOCKET_FINAL_SIGTERM, SOCKET_FAILURE_TIMEOUT); | |
3203 | break; | |
3204 | ||
3205 | case SOCKET_FINAL_SIGTERM: | |
3206 | if (s->kill_context.send_sigkill) { | |
3207 | log_unit_warning(UNIT(s), "Stopping timed out (2). Killing."); | |
3208 | socket_enter_signal(s, SOCKET_FINAL_SIGKILL, SOCKET_FAILURE_TIMEOUT); | |
3209 | } else { | |
3210 | log_unit_warning(UNIT(s), "Stopping timed out (2). Skipping SIGKILL. Ignoring."); | |
3211 | socket_enter_dead(s, SOCKET_FAILURE_TIMEOUT); | |
3212 | } | |
3213 | break; | |
3214 | ||
3215 | case SOCKET_FINAL_SIGKILL: | |
3216 | log_unit_warning(UNIT(s), "Still around after SIGKILL (2). Entering failed mode."); | |
3217 | socket_enter_dead(s, SOCKET_FAILURE_TIMEOUT); | |
3218 | break; | |
3219 | ||
3220 | case SOCKET_CLEANING: | |
3221 | log_unit_warning(UNIT(s), "Cleaning timed out. killing."); | |
3222 | ||
3223 | if (s->clean_result == SOCKET_SUCCESS) | |
3224 | s->clean_result = SOCKET_FAILURE_TIMEOUT; | |
3225 | ||
3226 | socket_enter_signal(s, SOCKET_FINAL_SIGKILL, 0); | |
3227 | break; | |
3228 | ||
3229 | default: | |
3230 | assert_not_reached("Timeout at wrong time."); | |
3231 | } | |
3232 | ||
3233 | return 0; | |
3234 | } | |
3235 | ||
3236 | int socket_collect_fds(Socket *s, int **fds) { | |
3237 | size_t k = 0, n = 0; | |
3238 | SocketPort *p; | |
3239 | int *rfds; | |
3240 | ||
3241 | assert(s); | |
3242 | assert(fds); | |
3243 | ||
3244 | /* Called from the service code for requesting our fds */ | |
3245 | ||
3246 | LIST_FOREACH(port, p, s->ports) { | |
3247 | if (p->fd >= 0) | |
3248 | n++; | |
3249 | n += p->n_auxiliary_fds; | |
3250 | } | |
3251 | ||
3252 | if (n <= 0) { | |
3253 | *fds = NULL; | |
3254 | return 0; | |
3255 | } | |
3256 | ||
3257 | rfds = new(int, n); | |
3258 | if (!rfds) | |
3259 | return -ENOMEM; | |
3260 | ||
3261 | LIST_FOREACH(port, p, s->ports) { | |
3262 | size_t i; | |
3263 | ||
3264 | if (p->fd >= 0) | |
3265 | rfds[k++] = p->fd; | |
3266 | for (i = 0; i < p->n_auxiliary_fds; ++i) | |
3267 | rfds[k++] = p->auxiliary_fds[i]; | |
3268 | } | |
3269 | ||
3270 | assert(k == n); | |
3271 | ||
3272 | *fds = rfds; | |
3273 | return (int) n; | |
3274 | } | |
3275 | ||
3276 | static void socket_reset_failed(Unit *u) { | |
3277 | Socket *s = SOCKET(u); | |
3278 | ||
3279 | assert(s); | |
3280 | ||
3281 | if (s->state == SOCKET_FAILED) | |
3282 | socket_set_state(s, SOCKET_DEAD); | |
3283 | ||
3284 | s->result = SOCKET_SUCCESS; | |
3285 | s->clean_result = SOCKET_SUCCESS; | |
3286 | } | |
3287 | ||
3288 | void socket_connection_unref(Socket *s) { | |
3289 | assert(s); | |
3290 | ||
3291 | /* The service is dead. Yay! | |
3292 | * | |
3293 | * This is strictly for one-instance-per-connection | |
3294 | * services. */ | |
3295 | ||
3296 | assert(s->n_connections > 0); | |
3297 | s->n_connections--; | |
3298 | ||
3299 | log_unit_debug(UNIT(s), "One connection closed, %u left.", s->n_connections); | |
3300 | } | |
3301 | ||
3302 | static void socket_trigger_notify(Unit *u, Unit *other) { | |
3303 | Socket *s = SOCKET(u); | |
3304 | ||
3305 | assert(u); | |
3306 | assert(other); | |
3307 | ||
3308 | /* Filter out invocations with bogus state */ | |
3309 | assert(UNIT_IS_LOAD_COMPLETE(other->load_state)); | |
3310 | assert(other->type == UNIT_SERVICE); | |
3311 | ||
3312 | /* Don't propagate state changes from the service if we are already down */ | |
3313 | if (!IN_SET(s->state, SOCKET_RUNNING, SOCKET_LISTENING)) | |
3314 | return; | |
3315 | ||
3316 | /* We don't care for the service state if we are in Accept=yes mode */ | |
3317 | if (s->accept) | |
3318 | return; | |
3319 | ||
3320 | /* Propagate start limit hit state */ | |
3321 | if (other->start_limit_hit) { | |
3322 | socket_enter_stop_pre(s, SOCKET_FAILURE_SERVICE_START_LIMIT_HIT); | |
3323 | return; | |
3324 | } | |
3325 | ||
3326 | /* Don't propagate anything if there's still a job queued */ | |
3327 | if (other->job) | |
3328 | return; | |
3329 | ||
3330 | if (IN_SET(SERVICE(other)->state, | |
3331 | SERVICE_DEAD, SERVICE_FAILED, | |
3332 | SERVICE_FINAL_SIGTERM, SERVICE_FINAL_SIGKILL, | |
3333 | SERVICE_AUTO_RESTART)) | |
3334 | socket_enter_listening(s); | |
3335 | ||
3336 | if (SERVICE(other)->state == SERVICE_RUNNING) | |
3337 | socket_set_state(s, SOCKET_RUNNING); | |
3338 | } | |
3339 | ||
3340 | static int socket_kill(Unit *u, KillWho who, int signo, sd_bus_error *error) { | |
3341 | return unit_kill_common(u, who, signo, -1, SOCKET(u)->control_pid, error); | |
3342 | } | |
3343 | ||
3344 | static int socket_get_timeout(Unit *u, usec_t *timeout) { | |
3345 | Socket *s = SOCKET(u); | |
3346 | usec_t t; | |
3347 | int r; | |
3348 | ||
3349 | if (!s->timer_event_source) | |
3350 | return 0; | |
3351 | ||
3352 | r = sd_event_source_get_time(s->timer_event_source, &t); | |
3353 | if (r < 0) | |
3354 | return r; | |
3355 | if (t == USEC_INFINITY) | |
3356 | return 0; | |
3357 | ||
3358 | *timeout = t; | |
3359 | return 1; | |
3360 | } | |
3361 | ||
3362 | char *socket_fdname(Socket *s) { | |
3363 | assert(s); | |
3364 | ||
3365 | /* Returns the name to use for $LISTEN_NAMES. If the user | |
3366 | * didn't specify anything specifically, use the socket unit's | |
3367 | * name as fallback. */ | |
3368 | ||
3369 | return s->fdname ?: UNIT(s)->id; | |
3370 | } | |
3371 | ||
3372 | static int socket_control_pid(Unit *u) { | |
3373 | Socket *s = SOCKET(u); | |
3374 | ||
3375 | assert(s); | |
3376 | ||
3377 | return s->control_pid; | |
3378 | } | |
3379 | ||
3380 | static int socket_clean(Unit *u, ExecCleanMask mask) { | |
3381 | _cleanup_strv_free_ char **l = NULL; | |
3382 | Socket *s = SOCKET(u); | |
3383 | int r; | |
3384 | ||
3385 | assert(s); | |
3386 | assert(mask != 0); | |
3387 | ||
3388 | if (s->state != SOCKET_DEAD) | |
3389 | return -EBUSY; | |
3390 | ||
3391 | r = exec_context_get_clean_directories(&s->exec_context, u->manager->prefix, mask, &l); | |
3392 | if (r < 0) | |
3393 | return r; | |
3394 | ||
3395 | if (strv_isempty(l)) | |
3396 | return -EUNATCH; | |
3397 | ||
3398 | socket_unwatch_control_pid(s); | |
3399 | s->clean_result = SOCKET_SUCCESS; | |
3400 | s->control_command = NULL; | |
3401 | s->control_command_id = _SOCKET_EXEC_COMMAND_INVALID; | |
3402 | ||
3403 | r = socket_arm_timer(s, usec_add(now(CLOCK_MONOTONIC), s->exec_context.timeout_clean_usec)); | |
3404 | if (r < 0) | |
3405 | goto fail; | |
3406 | ||
3407 | r = unit_fork_and_watch_rm_rf(u, l, &s->control_pid); | |
3408 | if (r < 0) | |
3409 | goto fail; | |
3410 | ||
3411 | socket_set_state(s, SOCKET_CLEANING); | |
3412 | ||
3413 | return 0; | |
3414 | ||
3415 | fail: | |
3416 | log_unit_warning_errno(u, r, "Failed to initiate cleaning: %m"); | |
3417 | s->clean_result = SOCKET_FAILURE_RESOURCES; | |
3418 | s->timer_event_source = sd_event_source_disable_unref(s->timer_event_source); | |
3419 | return r; | |
3420 | } | |
3421 | ||
3422 | static int socket_can_clean(Unit *u, ExecCleanMask *ret) { | |
3423 | Socket *s = SOCKET(u); | |
3424 | ||
3425 | assert(s); | |
3426 | ||
3427 | return exec_context_get_clean_mask(&s->exec_context, ret); | |
3428 | } | |
3429 | ||
3430 | static const char* const socket_exec_command_table[_SOCKET_EXEC_COMMAND_MAX] = { | |
3431 | [SOCKET_EXEC_START_PRE] = "ExecStartPre", | |
3432 | [SOCKET_EXEC_START_CHOWN] = "ExecStartChown", | |
3433 | [SOCKET_EXEC_START_POST] = "ExecStartPost", | |
3434 | [SOCKET_EXEC_STOP_PRE] = "ExecStopPre", | |
3435 | [SOCKET_EXEC_STOP_POST] = "ExecStopPost" | |
3436 | }; | |
3437 | ||
3438 | DEFINE_STRING_TABLE_LOOKUP(socket_exec_command, SocketExecCommand); | |
3439 | ||
3440 | static const char* const socket_result_table[_SOCKET_RESULT_MAX] = { | |
3441 | [SOCKET_SUCCESS] = "success", | |
3442 | [SOCKET_FAILURE_RESOURCES] = "resources", | |
3443 | [SOCKET_FAILURE_TIMEOUT] = "timeout", | |
3444 | [SOCKET_FAILURE_EXIT_CODE] = "exit-code", | |
3445 | [SOCKET_FAILURE_SIGNAL] = "signal", | |
3446 | [SOCKET_FAILURE_CORE_DUMP] = "core-dump", | |
3447 | [SOCKET_FAILURE_START_LIMIT_HIT] = "start-limit-hit", | |
3448 | [SOCKET_FAILURE_TRIGGER_LIMIT_HIT] = "trigger-limit-hit", | |
3449 | [SOCKET_FAILURE_SERVICE_START_LIMIT_HIT] = "service-start-limit-hit" | |
3450 | }; | |
3451 | ||
3452 | DEFINE_STRING_TABLE_LOOKUP(socket_result, SocketResult); | |
3453 | ||
3454 | static const char* const socket_timestamping_table[_SOCKET_TIMESTAMPING_MAX] = { | |
3455 | [SOCKET_TIMESTAMPING_OFF] = "off", | |
3456 | [SOCKET_TIMESTAMPING_US] = "us", | |
3457 | [SOCKET_TIMESTAMPING_NS] = "ns", | |
3458 | }; | |
3459 | ||
3460 | DEFINE_STRING_TABLE_LOOKUP(socket_timestamping, SocketTimestamping); | |
3461 | ||
3462 | SocketTimestamping socket_timestamping_from_string_harder(const char *p) { | |
3463 | SocketTimestamping t; | |
3464 | int r; | |
3465 | ||
3466 | if (!p) | |
3467 | return _SOCKET_TIMESTAMPING_INVALID; | |
3468 | ||
3469 | t = socket_timestamping_from_string(p); | |
3470 | if (t >= 0) | |
3471 | return t; | |
3472 | ||
3473 | /* Let's alternatively support the various other aliases parse_time() accepts for ns and µs here, | |
3474 | * too. */ | |
3475 | if (streq(p, "nsec")) | |
3476 | return SOCKET_TIMESTAMPING_NS; | |
3477 | if (STR_IN_SET(p, "usec", "µs")) | |
3478 | return SOCKET_TIMESTAMPING_US; | |
3479 | ||
3480 | r = parse_boolean(p); | |
3481 | if (r < 0) | |
3482 | return _SOCKET_TIMESTAMPING_INVALID; | |
3483 | ||
3484 | return r ? SOCKET_TIMESTAMPING_NS : SOCKET_TIMESTAMPING_OFF; /* If boolean yes, default to ns accuracy */ | |
3485 | } | |
3486 | ||
3487 | const UnitVTable socket_vtable = { | |
3488 | .object_size = sizeof(Socket), | |
3489 | .exec_context_offset = offsetof(Socket, exec_context), | |
3490 | .cgroup_context_offset = offsetof(Socket, cgroup_context), | |
3491 | .kill_context_offset = offsetof(Socket, kill_context), | |
3492 | .exec_runtime_offset = offsetof(Socket, exec_runtime), | |
3493 | .dynamic_creds_offset = offsetof(Socket, dynamic_creds), | |
3494 | ||
3495 | .sections = | |
3496 | "Unit\0" | |
3497 | "Socket\0" | |
3498 | "Install\0", | |
3499 | .private_section = "Socket", | |
3500 | ||
3501 | .can_transient = true, | |
3502 | .can_trigger = true, | |
3503 | .can_fail = true, | |
3504 | ||
3505 | .init = socket_init, | |
3506 | .done = socket_done, | |
3507 | .load = socket_load, | |
3508 | ||
3509 | .coldplug = socket_coldplug, | |
3510 | ||
3511 | .dump = socket_dump, | |
3512 | ||
3513 | .start = socket_start, | |
3514 | .stop = socket_stop, | |
3515 | ||
3516 | .kill = socket_kill, | |
3517 | .clean = socket_clean, | |
3518 | .can_clean = socket_can_clean, | |
3519 | ||
3520 | .get_timeout = socket_get_timeout, | |
3521 | ||
3522 | .serialize = socket_serialize, | |
3523 | .deserialize_item = socket_deserialize_item, | |
3524 | .distribute_fds = socket_distribute_fds, | |
3525 | ||
3526 | .active_state = socket_active_state, | |
3527 | .sub_state_to_string = socket_sub_state_to_string, | |
3528 | ||
3529 | .will_restart = unit_will_restart_default, | |
3530 | ||
3531 | .may_gc = socket_may_gc, | |
3532 | ||
3533 | .sigchld_event = socket_sigchld_event, | |
3534 | ||
3535 | .trigger_notify = socket_trigger_notify, | |
3536 | ||
3537 | .reset_failed = socket_reset_failed, | |
3538 | ||
3539 | .control_pid = socket_control_pid, | |
3540 | ||
3541 | .bus_set_property = bus_socket_set_property, | |
3542 | .bus_commit_properties = bus_socket_commit_properties, | |
3543 | ||
3544 | .status_message_formats = { | |
3545 | .finished_start_job = { | |
3546 | [JOB_DONE] = "Listening on %s.", | |
3547 | [JOB_FAILED] = "Failed to listen on %s.", | |
3548 | [JOB_TIMEOUT] = "Timed out starting %s.", | |
3549 | }, | |
3550 | .finished_stop_job = { | |
3551 | [JOB_DONE] = "Closed %s.", | |
3552 | [JOB_FAILED] = "Failed stopping %s.", | |
3553 | [JOB_TIMEOUT] = "Timed out stopping %s.", | |
3554 | }, | |
3555 | }, | |
3556 | }; |