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Commit | Line | Data |
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53e1b683 | 1 | /* SPDX-License-Identifier: LGPL-2.1+ */ |
a7334b09 LP |
2 | /*** |
3 | This file is part of systemd. | |
4 | ||
5 | Copyright 2010 Lennart Poettering | |
a7334b09 LP |
6 | ***/ |
7 | ||
e8da24a6 | 8 | #include <arpa/inet.h> |
83c60c9f LP |
9 | #include <errno.h> |
10 | #include <fcntl.h> | |
916abb21 | 11 | #include <mqueue.h> |
e8da24a6 LP |
12 | #include <netinet/tcp.h> |
13 | #include <signal.h> | |
14 | #include <sys/epoll.h> | |
15 | #include <sys/stat.h> | |
16 | #include <unistd.h> | |
62bc4efc | 17 | #include <linux/sctp.h> |
83c60c9f | 18 | |
b5efdb8a | 19 | #include "alloc-util.h" |
a79279c7 | 20 | #include "bpf-firewall.h" |
e8da24a6 LP |
21 | #include "bus-error.h" |
22 | #include "bus-util.h" | |
23 | #include "copy.h" | |
24 | #include "dbus-socket.h" | |
25 | #include "def.h" | |
26 | #include "exit-status.h" | |
3ffd4af2 | 27 | #include "fd-util.h" |
f97b34a6 | 28 | #include "format-util.h" |
95f7fbbf | 29 | #include "fs-util.h" |
a79279c7 | 30 | #include "in-addr-util.h" |
60d9771c | 31 | #include "io-util.h" |
e8da24a6 | 32 | #include "label.h" |
83c60c9f | 33 | #include "log.h" |
e8da24a6 | 34 | #include "missing.h" |
49e942b2 | 35 | #include "mkdir.h" |
6bedfcbb | 36 | #include "parse-util.h" |
9eb977db | 37 | #include "path-util.h" |
7b3e062c | 38 | #include "process-util.h" |
d7b8eec7 | 39 | #include "selinux-util.h" |
24882e06 | 40 | #include "signal-util.h" |
e8da24a6 | 41 | #include "smack-util.h" |
24882e06 | 42 | #include "socket.h" |
e045e325 | 43 | #include "socket-protocol-list.h" |
e8da24a6 | 44 | #include "special.h" |
8b43440b | 45 | #include "string-table.h" |
07630cea | 46 | #include "string-util.h" |
e8da24a6 LP |
47 | #include "strv.h" |
48 | #include "unit-name.h" | |
e8da24a6 | 49 | #include "unit.h" |
b1d4f8e1 | 50 | #include "user-util.h" |
83c60c9f | 51 | |
166cf510 ZJS |
52 | struct SocketPeer { |
53 | unsigned n_ref; | |
54 | ||
55 | Socket *socket; | |
56 | union sockaddr_union peer; | |
41733ae1 | 57 | socklen_t peer_salen; |
166cf510 ZJS |
58 | }; |
59 | ||
acbb0225 | 60 | static const UnitActiveState state_translation_table[_SOCKET_STATE_MAX] = { |
87f0e418 LP |
61 | [SOCKET_DEAD] = UNIT_INACTIVE, |
62 | [SOCKET_START_PRE] = UNIT_ACTIVATING, | |
3900e5fd | 63 | [SOCKET_START_CHOWN] = UNIT_ACTIVATING, |
87f0e418 LP |
64 | [SOCKET_START_POST] = UNIT_ACTIVATING, |
65 | [SOCKET_LISTENING] = UNIT_ACTIVE, | |
66 | [SOCKET_RUNNING] = UNIT_ACTIVE, | |
67 | [SOCKET_STOP_PRE] = UNIT_DEACTIVATING, | |
68 | [SOCKET_STOP_PRE_SIGTERM] = UNIT_DEACTIVATING, | |
69 | [SOCKET_STOP_PRE_SIGKILL] = UNIT_DEACTIVATING, | |
70 | [SOCKET_STOP_POST] = UNIT_DEACTIVATING, | |
80876c20 LP |
71 | [SOCKET_FINAL_SIGTERM] = UNIT_DEACTIVATING, |
72 | [SOCKET_FINAL_SIGKILL] = UNIT_DEACTIVATING, | |
fdf20a31 | 73 | [SOCKET_FAILED] = UNIT_FAILED |
83c60c9f | 74 | }; |
5cb5a6ff | 75 | |
718db961 LP |
76 | static int socket_dispatch_io(sd_event_source *source, int fd, uint32_t revents, void *userdata); |
77 | static int socket_dispatch_timer(sd_event_source *source, usec_t usec, void *userdata); | |
78 | ||
a16e1123 LP |
79 | static void socket_init(Unit *u) { |
80 | Socket *s = SOCKET(u); | |
81 | ||
82 | assert(u); | |
ac155bb8 | 83 | assert(u->load_state == UNIT_STUB); |
a16e1123 | 84 | |
a16e1123 | 85 | s->backlog = SOMAXCONN; |
1f19a534 | 86 | s->timeout_usec = u->manager->default_timeout_start_usec; |
a16e1123 | 87 | s->directory_mode = 0755; |
9131f660 | 88 | s->socket_mode = 0666; |
a16e1123 | 89 | |
6cf6bbc2 LP |
90 | s->max_connections = 64; |
91 | ||
4fd5948e | 92 | s->priority = -1; |
4fd5948e LP |
93 | s->ip_tos = -1; |
94 | s->ip_ttl = -1; | |
4fd5948e | 95 | s->mark = -1; |
4fd5948e | 96 | |
ac155bb8 MS |
97 | s->exec_context.std_output = u->manager->default_std_output; |
98 | s->exec_context.std_error = u->manager->default_std_error; | |
085afe36 | 99 | |
a16e1123 | 100 | s->control_command_id = _SOCKET_EXEC_COMMAND_INVALID; |
8b26cdbd | 101 | |
1f15ce28 LP |
102 | s->trigger_limit.interval = USEC_INFINITY; |
103 | s->trigger_limit.burst = (unsigned) -1; | |
a16e1123 | 104 | } |
acbb0225 | 105 | |
5e94833f LP |
106 | static void socket_unwatch_control_pid(Socket *s) { |
107 | assert(s); | |
108 | ||
109 | if (s->control_pid <= 0) | |
110 | return; | |
111 | ||
112 | unit_unwatch_pid(UNIT(s), s->control_pid); | |
113 | s->control_pid = 0; | |
114 | } | |
115 | ||
15087cdb | 116 | static void socket_cleanup_fd_list(SocketPort *p) { |
3ffd4af2 | 117 | assert(p); |
15087cdb | 118 | |
3ffd4af2 | 119 | close_many(p->auxiliary_fds, p->n_auxiliary_fds); |
15087cdb PS |
120 | p->auxiliary_fds = mfree(p->auxiliary_fds); |
121 | p->n_auxiliary_fds = 0; | |
122 | } | |
123 | ||
74051b9b | 124 | void socket_free_ports(Socket *s) { |
034c6ed7 LP |
125 | SocketPort *p; |
126 | ||
127 | assert(s); | |
128 | ||
129 | while ((p = s->ports)) { | |
71fda00f | 130 | LIST_REMOVE(port, s->ports, p); |
034c6ed7 | 131 | |
718db961 LP |
132 | sd_event_source_unref(p->event_source); |
133 | ||
15087cdb | 134 | socket_cleanup_fd_list(p); |
03e334a1 | 135 | safe_close(p->fd); |
034c6ed7 LP |
136 | free(p->path); |
137 | free(p); | |
138 | } | |
74051b9b LP |
139 | } |
140 | ||
141 | static void socket_done(Unit *u) { | |
142 | Socket *s = SOCKET(u); | |
9d565427 | 143 | SocketPeer *p; |
74051b9b LP |
144 | |
145 | assert(s); | |
146 | ||
147 | socket_free_ports(s); | |
034c6ed7 | 148 | |
9a73653c | 149 | while ((p = set_steal_first(s->peers_by_address))) |
9d565427 SS |
150 | p->socket = NULL; |
151 | ||
9a73653c | 152 | s->peers_by_address = set_free(s->peers_by_address); |
9d565427 | 153 | |
e8a565cb | 154 | s->exec_runtime = exec_runtime_unref(s->exec_runtime, false); |
e537352b | 155 | exec_command_free_array(s->exec_command, _SOCKET_EXEC_COMMAND_MAX); |
034c6ed7 LP |
156 | s->control_command = NULL; |
157 | ||
29206d46 LP |
158 | dynamic_creds_unref(&s->dynamic_creds); |
159 | ||
5e94833f | 160 | socket_unwatch_control_pid(s); |
034c6ed7 | 161 | |
57020a3a | 162 | unit_ref_unset(&s->service); |
034c6ed7 | 163 | |
a1e58e8e LP |
164 | s->tcp_congestion = mfree(s->tcp_congestion); |
165 | s->bind_to_device = mfree(s->bind_to_device); | |
acbb0225 | 166 | |
0a78712e DM |
167 | s->smack = mfree(s->smack); |
168 | s->smack_ip_in = mfree(s->smack_ip_in); | |
169 | s->smack_ip_out = mfree(s->smack_ip_out); | |
0eb59ccf | 170 | |
811ba7a0 LP |
171 | strv_free(s->symlinks); |
172 | ||
0a78712e DM |
173 | s->user = mfree(s->user); |
174 | s->group = mfree(s->group); | |
3900e5fd | 175 | |
a97b23d6 DM |
176 | s->fdname = mfree(s->fdname); |
177 | ||
718db961 LP |
178 | s->timer_event_source = sd_event_source_unref(s->timer_event_source); |
179 | } | |
180 | ||
36c16a7c | 181 | static int socket_arm_timer(Socket *s, usec_t usec) { |
718db961 LP |
182 | int r; |
183 | ||
184 | assert(s); | |
185 | ||
718db961 | 186 | if (s->timer_event_source) { |
36c16a7c | 187 | r = sd_event_source_set_time(s->timer_event_source, usec); |
718db961 LP |
188 | if (r < 0) |
189 | return r; | |
190 | ||
191 | return sd_event_source_set_enabled(s->timer_event_source, SD_EVENT_ONESHOT); | |
192 | } | |
193 | ||
36c16a7c LP |
194 | if (usec == USEC_INFINITY) |
195 | return 0; | |
196 | ||
7dfbe2e3 | 197 | r = sd_event_add_time( |
6a0f1f6d LP |
198 | UNIT(s)->manager->event, |
199 | &s->timer_event_source, | |
200 | CLOCK_MONOTONIC, | |
36c16a7c | 201 | usec, 0, |
6a0f1f6d | 202 | socket_dispatch_timer, s); |
7dfbe2e3 TG |
203 | if (r < 0) |
204 | return r; | |
205 | ||
206 | (void) sd_event_source_set_description(s->timer_event_source, "socket-timer"); | |
207 | ||
208 | return 0; | |
5cb5a6ff LP |
209 | } |
210 | ||
8b835fcc ZJS |
211 | int socket_instantiate_service(Socket *s) { |
212 | _cleanup_free_ char *prefix = NULL, *name = NULL; | |
b15bdda8 LP |
213 | int r; |
214 | Unit *u; | |
215 | ||
216 | assert(s); | |
217 | ||
218 | /* This fills in s->service if it isn't filled in yet. For | |
219 | * Accept=yes sockets we create the next connection service | |
220 | * here. For Accept=no this is mostly a NOP since the service | |
221 | * is figured out at load time anyway. */ | |
222 | ||
7410616c | 223 | if (UNIT_DEREF(s->service)) |
b15bdda8 LP |
224 | return 0; |
225 | ||
7410616c LP |
226 | if (!s->accept) |
227 | return 0; | |
228 | ||
229 | r = unit_name_to_prefix(UNIT(s)->id, &prefix); | |
230 | if (r < 0) | |
231 | return r; | |
b15bdda8 | 232 | |
315db1a8 | 233 | if (asprintf(&name, "%s@%u.service", prefix, s->n_accepted) < 0) |
b15bdda8 LP |
234 | return -ENOMEM; |
235 | ||
1124fe6f | 236 | r = manager_load_unit(UNIT(s)->manager, name, NULL, NULL, &u); |
b15bdda8 LP |
237 | if (r < 0) |
238 | return r; | |
239 | ||
7f7d01ed | 240 | unit_ref_set(&s->service, UNIT(s), u); |
57020a3a | 241 | |
eef85c4a | 242 | return unit_add_two_dependencies(UNIT(s), UNIT_BEFORE, UNIT_TRIGGERS, u, false, UNIT_DEPENDENCY_IMPLICIT); |
b15bdda8 LP |
243 | } |
244 | ||
4f2d528d LP |
245 | static bool have_non_accept_socket(Socket *s) { |
246 | SocketPort *p; | |
247 | ||
248 | assert(s); | |
249 | ||
250 | if (!s->accept) | |
251 | return true; | |
252 | ||
dd5ad9d4 LP |
253 | LIST_FOREACH(port, p, s->ports) { |
254 | ||
255 | if (p->type != SOCKET_SOCKET) | |
256 | return true; | |
257 | ||
4f2d528d LP |
258 | if (!socket_address_can_accept(&p->address)) |
259 | return true; | |
dd5ad9d4 | 260 | } |
4f2d528d LP |
261 | |
262 | return false; | |
263 | } | |
264 | ||
eef85c4a | 265 | static int socket_add_mount_dependencies(Socket *s) { |
6e2ef85b | 266 | SocketPort *p; |
6e2ef85b LP |
267 | int r; |
268 | ||
269 | assert(s); | |
6e2ef85b | 270 | |
a57f7e2c LP |
271 | LIST_FOREACH(port, p, s->ports) { |
272 | const char *path = NULL; | |
6e2ef85b | 273 | |
a57f7e2c LP |
274 | if (p->type == SOCKET_SOCKET) |
275 | path = socket_address_get_path(&p->address); | |
60252446 | 276 | else if (IN_SET(p->type, SOCKET_FIFO, SOCKET_SPECIAL, SOCKET_USB_FUNCTION)) |
a57f7e2c | 277 | path = p->path; |
6e2ef85b | 278 | |
a57f7e2c LP |
279 | if (!path) |
280 | continue; | |
6e2ef85b | 281 | |
eef85c4a | 282 | r = unit_require_mounts_for(UNIT(s), path, UNIT_DEPENDENCY_FILE); |
b87705cd | 283 | if (r < 0) |
6e2ef85b | 284 | return r; |
b87705cd | 285 | } |
6e2ef85b LP |
286 | |
287 | return 0; | |
288 | } | |
289 | ||
eef85c4a | 290 | static int socket_add_device_dependencies(Socket *s) { |
6e2ef85b | 291 | char *t; |
6e2ef85b LP |
292 | |
293 | assert(s); | |
294 | ||
7d0c710d | 295 | if (!s->bind_to_device || streq(s->bind_to_device, "lo")) |
6e2ef85b LP |
296 | return 0; |
297 | ||
63c372cb | 298 | t = strjoina("/sys/subsystem/net/devices/", s->bind_to_device); |
eef85c4a | 299 | return unit_add_node_dependency(UNIT(s), t, false, UNIT_BINDS_TO, UNIT_DEPENDENCY_FILE); |
6e2ef85b LP |
300 | } |
301 | ||
a40eb732 LP |
302 | static int socket_add_default_dependencies(Socket *s) { |
303 | int r; | |
304 | assert(s); | |
305 | ||
4c9ea260 LP |
306 | if (!UNIT(s)->default_dependencies) |
307 | return 0; | |
308 | ||
eef85c4a | 309 | r = unit_add_dependency_by_name(UNIT(s), UNIT_BEFORE, SPECIAL_SOCKETS_TARGET, NULL, true, UNIT_DEPENDENCY_DEFAULT); |
e3d84721 LP |
310 | if (r < 0) |
311 | return r; | |
2a77d31d | 312 | |
463d0d15 | 313 | if (MANAGER_IS_SYSTEM(UNIT(s)->manager)) { |
eef85c4a | 314 | r = unit_add_two_dependencies_by_name(UNIT(s), UNIT_AFTER, UNIT_REQUIRES, SPECIAL_SYSINIT_TARGET, NULL, true, UNIT_DEPENDENCY_DEFAULT); |
e3d84721 | 315 | if (r < 0) |
a40eb732 | 316 | return r; |
2a77d31d | 317 | } |
a40eb732 | 318 | |
eef85c4a | 319 | return unit_add_two_dependencies_by_name(UNIT(s), UNIT_BEFORE, UNIT_CONFLICTS, SPECIAL_SHUTDOWN_TARGET, NULL, true, UNIT_DEPENDENCY_DEFAULT); |
a40eb732 LP |
320 | } |
321 | ||
44a6b1b6 | 322 | _pure_ static bool socket_has_exec(Socket *s) { |
4cfc6dbe LP |
323 | unsigned i; |
324 | assert(s); | |
325 | ||
326 | for (i = 0; i < _SOCKET_EXEC_COMMAND_MAX; i++) | |
327 | if (s->exec_command[i]) | |
328 | return true; | |
329 | ||
330 | return false; | |
331 | } | |
332 | ||
e821075a LP |
333 | static int socket_add_extras(Socket *s) { |
334 | Unit *u = UNIT(s); | |
e537352b | 335 | int r; |
44d8db9e | 336 | |
e821075a | 337 | assert(s); |
57020a3a | 338 | |
1f15ce28 LP |
339 | /* Pick defaults for the trigger limit, if nothing was explicitly configured. We pick a relatively high limit |
340 | * in Accept=yes mode, and a lower limit for Accept=no. Reason: in Accept=yes mode we are invoking accept() | |
341 | * ourselves before the trigger limit can hit, thus incoming connections are taken off the socket queue quickly | |
342 | * and reliably. This is different for Accept=no, where the spawned service has to take the incoming traffic | |
343 | * off the queues, which it might not necessarily do. Moreover, while Accept=no services are supposed to | |
344 | * process whatever is queued in one go, and thus should normally never have to be started frequently. This is | |
345 | * different for Accept=yes where each connection is processed by a new service instance, and thus frequent | |
346 | * service starts are typical. */ | |
347 | ||
348 | if (s->trigger_limit.interval == USEC_INFINITY) | |
349 | s->trigger_limit.interval = 2 * USEC_PER_SEC; | |
350 | ||
351 | if (s->trigger_limit.burst == (unsigned) -1) { | |
352 | if (s->accept) | |
353 | s->trigger_limit.burst = 200; | |
354 | else | |
355 | s->trigger_limit.burst = 20; | |
356 | } | |
357 | ||
e821075a | 358 | if (have_non_accept_socket(s)) { |
23a177ef | 359 | |
e821075a LP |
360 | if (!UNIT_DEREF(s->service)) { |
361 | Unit *x; | |
57020a3a | 362 | |
e821075a | 363 | r = unit_load_related_unit(u, ".service", &x); |
57020a3a | 364 | if (r < 0) |
4f2d528d | 365 | return r; |
e821075a | 366 | |
7f7d01ed | 367 | unit_ref_set(&s->service, u, x); |
4f2d528d | 368 | } |
44d8db9e | 369 | |
eef85c4a | 370 | r = unit_add_two_dependencies(u, UNIT_BEFORE, UNIT_TRIGGERS, UNIT_DEREF(s->service), true, UNIT_DEPENDENCY_IMPLICIT); |
e821075a | 371 | if (r < 0) |
6e2ef85b | 372 | return r; |
e821075a | 373 | } |
6e2ef85b | 374 | |
eef85c4a | 375 | r = socket_add_mount_dependencies(s); |
e821075a LP |
376 | if (r < 0) |
377 | return r; | |
6e2ef85b | 378 | |
eef85c4a | 379 | r = socket_add_device_dependencies(s); |
e821075a LP |
380 | if (r < 0) |
381 | return r; | |
382 | ||
598459ce | 383 | r = unit_patch_contexts(u); |
e821075a LP |
384 | if (r < 0) |
385 | return r; | |
386 | ||
387 | if (socket_has_exec(s)) { | |
388 | r = unit_add_exec_dependencies(u, &s->exec_context); | |
389 | if (r < 0) | |
390 | return r; | |
e821075a | 391 | } |
a016b922 | 392 | |
88af31f9 LP |
393 | r = unit_set_default_slice(u); |
394 | if (r < 0) | |
395 | return r; | |
396 | ||
4c9ea260 LP |
397 | r = socket_add_default_dependencies(s); |
398 | if (r < 0) | |
399 | return r; | |
e821075a LP |
400 | |
401 | return 0; | |
402 | } | |
403 | ||
811ba7a0 LP |
404 | static const char *socket_find_symlink_target(Socket *s) { |
405 | const char *found = NULL; | |
406 | SocketPort *p; | |
407 | ||
408 | LIST_FOREACH(port, p, s->ports) { | |
409 | const char *f = NULL; | |
410 | ||
411 | switch (p->type) { | |
412 | ||
413 | case SOCKET_FIFO: | |
414 | f = p->path; | |
415 | break; | |
416 | ||
417 | case SOCKET_SOCKET: | |
b9495e8d | 418 | f = socket_address_get_path(&p->address); |
811ba7a0 LP |
419 | break; |
420 | ||
421 | default: | |
422 | break; | |
423 | } | |
424 | ||
425 | if (f) { | |
426 | if (found) | |
427 | return NULL; | |
428 | ||
429 | found = f; | |
430 | } | |
431 | } | |
432 | ||
433 | return found; | |
434 | } | |
435 | ||
e821075a LP |
436 | static int socket_verify(Socket *s) { |
437 | assert(s); | |
438 | ||
439 | if (UNIT(s)->load_state != UNIT_LOADED) | |
440 | return 0; | |
441 | ||
442 | if (!s->ports) { | |
da3bddc9 | 443 | log_unit_error(UNIT(s), "Unit has no Listen setting (ListenStream=, ListenDatagram=, ListenFIFO=, ...). Refusing."); |
6f40aa45 | 444 | return -ENOEXEC; |
e821075a LP |
445 | } |
446 | ||
447 | if (s->accept && have_non_accept_socket(s)) { | |
f2341e0a | 448 | log_unit_error(UNIT(s), "Unit configured for accepting sockets, but sockets are non-accepting. Refusing."); |
6f40aa45 | 449 | return -ENOEXEC; |
e821075a LP |
450 | } |
451 | ||
452 | if (s->accept && s->max_connections <= 0) { | |
f2341e0a | 453 | log_unit_error(UNIT(s), "MaxConnection= setting too small. Refusing."); |
6f40aa45 | 454 | return -ENOEXEC; |
e821075a | 455 | } |
e06c73cc | 456 | |
e821075a | 457 | if (s->accept && UNIT_DEREF(s->service)) { |
f2341e0a | 458 | log_unit_error(UNIT(s), "Explicit service configuration for accepting socket units not supported. Refusing."); |
6f40aa45 | 459 | return -ENOEXEC; |
e821075a LP |
460 | } |
461 | ||
462 | if (s->exec_context.pam_name && s->kill_context.kill_mode != KILL_CONTROL_GROUP) { | |
f2341e0a | 463 | log_unit_error(UNIT(s), "Unit has PAM enabled. Kill mode must be set to 'control-group'. Refusing."); |
6f40aa45 | 464 | return -ENOEXEC; |
e821075a LP |
465 | } |
466 | ||
811ba7a0 | 467 | if (!strv_isempty(s->symlinks) && !socket_find_symlink_target(s)) { |
f2341e0a | 468 | log_unit_error(UNIT(s), "Unit has symlinks set but none or more than one node in the file system. Refusing."); |
6f40aa45 | 469 | return -ENOEXEC; |
811ba7a0 LP |
470 | } |
471 | ||
e821075a LP |
472 | return 0; |
473 | } | |
474 | ||
9d565427 SS |
475 | static void peer_address_hash_func(const void *p, struct siphash *state) { |
476 | const SocketPeer *s = p; | |
477 | ||
478 | assert(s); | |
479 | ||
480 | if (s->peer.sa.sa_family == AF_INET) | |
481 | siphash24_compress(&s->peer.in.sin_addr, sizeof(s->peer.in.sin_addr), state); | |
41733ae1 | 482 | else if (s->peer.sa.sa_family == AF_INET6) |
9d565427 | 483 | siphash24_compress(&s->peer.in6.sin6_addr, sizeof(s->peer.in6.sin6_addr), state); |
359a5bcf SH |
484 | else if (s->peer.sa.sa_family == AF_VSOCK) |
485 | siphash24_compress(&s->peer.vm.svm_cid, sizeof(s->peer.vm.svm_cid), state); | |
41733ae1 LP |
486 | else |
487 | assert_not_reached("Unknown address family."); | |
9d565427 SS |
488 | } |
489 | ||
490 | static int peer_address_compare_func(const void *a, const void *b) { | |
491 | const SocketPeer *x = a, *y = b; | |
492 | ||
493 | if (x->peer.sa.sa_family < y->peer.sa.sa_family) | |
494 | return -1; | |
495 | if (x->peer.sa.sa_family > y->peer.sa.sa_family) | |
496 | return 1; | |
497 | ||
498 | switch(x->peer.sa.sa_family) { | |
499 | case AF_INET: | |
500 | return memcmp(&x->peer.in.sin_addr, &y->peer.in.sin_addr, sizeof(x->peer.in.sin_addr)); | |
501 | case AF_INET6: | |
502 | return memcmp(&x->peer.in6.sin6_addr, &y->peer.in6.sin6_addr, sizeof(x->peer.in6.sin6_addr)); | |
359a5bcf SH |
503 | case AF_VSOCK: |
504 | if (x->peer.vm.svm_cid < y->peer.vm.svm_cid) | |
505 | return -1; | |
506 | if (x->peer.vm.svm_cid > y->peer.vm.svm_cid) | |
507 | return 1; | |
508 | return 0; | |
9d565427 | 509 | } |
166cf510 | 510 | assert_not_reached("Black sheep in the family!"); |
9d565427 SS |
511 | } |
512 | ||
513 | const struct hash_ops peer_address_hash_ops = { | |
514 | .hash = peer_address_hash_func, | |
515 | .compare = peer_address_compare_func | |
516 | }; | |
517 | ||
e821075a LP |
518 | static int socket_load(Unit *u) { |
519 | Socket *s = SOCKET(u); | |
520 | int r; | |
521 | ||
522 | assert(u); | |
523 | assert(u->load_state == UNIT_STUB); | |
524 | ||
9a73653c | 525 | r = set_ensure_allocated(&s->peers_by_address, &peer_address_hash_ops); |
9d565427 SS |
526 | if (r < 0) |
527 | return r; | |
528 | ||
e821075a LP |
529 | r = unit_load_fragment_and_dropin(u); |
530 | if (r < 0) | |
531 | return r; | |
532 | ||
533 | if (u->load_state == UNIT_LOADED) { | |
534 | /* This is a new unit? Then let's add in some extras */ | |
535 | r = socket_add_extras(s); | |
e06c73cc LP |
536 | if (r < 0) |
537 | return r; | |
23a177ef LP |
538 | } |
539 | ||
4f2d528d | 540 | return socket_verify(s); |
44d8db9e LP |
541 | } |
542 | ||
166cf510 ZJS |
543 | static SocketPeer *socket_peer_new(void) { |
544 | SocketPeer *p; | |
545 | ||
546 | p = new0(SocketPeer, 1); | |
547 | if (!p) | |
548 | return NULL; | |
549 | ||
550 | p->n_ref = 1; | |
551 | ||
552 | return p; | |
553 | } | |
554 | ||
555 | SocketPeer *socket_peer_ref(SocketPeer *p) { | |
556 | if (!p) | |
557 | return NULL; | |
558 | ||
559 | assert(p->n_ref > 0); | |
560 | p->n_ref++; | |
561 | ||
562 | return p; | |
563 | } | |
564 | ||
565 | SocketPeer *socket_peer_unref(SocketPeer *p) { | |
566 | if (!p) | |
567 | return NULL; | |
568 | ||
569 | assert(p->n_ref > 0); | |
570 | ||
571 | p->n_ref--; | |
572 | ||
573 | if (p->n_ref > 0) | |
574 | return NULL; | |
575 | ||
576 | if (p->socket) | |
577 | set_remove(p->socket->peers_by_address, p); | |
578 | ||
579 | return mfree(p); | |
580 | } | |
581 | ||
3ebcd323 | 582 | int socket_acquire_peer(Socket *s, int fd, SocketPeer **p) { |
166cf510 ZJS |
583 | _cleanup_(socket_peer_unrefp) SocketPeer *remote = NULL; |
584 | SocketPeer sa = {}, *i; | |
585 | socklen_t salen = sizeof(sa.peer); | |
586 | int r; | |
587 | ||
588 | assert(fd >= 0); | |
589 | assert(s); | |
590 | ||
591 | r = getpeername(fd, &sa.peer.sa, &salen); | |
592 | if (r < 0) | |
593 | return log_error_errno(errno, "getpeername failed: %m"); | |
594 | ||
359a5bcf | 595 | if (!IN_SET(sa.peer.sa.sa_family, AF_INET, AF_INET6, AF_VSOCK)) { |
166cf510 ZJS |
596 | *p = NULL; |
597 | return 0; | |
598 | } | |
599 | ||
600 | i = set_get(s->peers_by_address, &sa); | |
601 | if (i) { | |
602 | *p = socket_peer_ref(i); | |
603 | return 1; | |
604 | } | |
605 | ||
606 | remote = socket_peer_new(); | |
607 | if (!remote) | |
608 | return log_oom(); | |
609 | ||
610 | remote->peer = sa.peer; | |
41733ae1 | 611 | remote->peer_salen = salen; |
166cf510 ZJS |
612 | |
613 | r = set_put(s->peers_by_address, remote); | |
614 | if (r < 0) | |
615 | return r; | |
616 | ||
617 | remote->socket = s; | |
618 | ||
1cc6c93a | 619 | *p = TAKE_PTR(remote); |
166cf510 ZJS |
620 | |
621 | return 1; | |
622 | } | |
623 | ||
44a6b1b6 | 624 | _const_ static const char* listen_lookup(int family, int type) { |
7a22745a LP |
625 | |
626 | if (family == AF_NETLINK) | |
627 | return "ListenNetlink"; | |
542563ba LP |
628 | |
629 | if (type == SOCK_STREAM) | |
630 | return "ListenStream"; | |
631 | else if (type == SOCK_DGRAM) | |
632 | return "ListenDatagram"; | |
633 | else if (type == SOCK_SEQPACKET) | |
634 | return "ListenSequentialPacket"; | |
635 | ||
034c6ed7 | 636 | assert_not_reached("Unknown socket type"); |
542563ba LP |
637 | return NULL; |
638 | } | |
639 | ||
87f0e418 | 640 | static void socket_dump(Unit *u, FILE *f, const char *prefix) { |
209e9dcd | 641 | char time_string[FORMAT_TIMESPAN_MAX]; |
5cb5a6ff | 642 | SocketExecCommand c; |
87f0e418 | 643 | Socket *s = SOCKET(u); |
542563ba | 644 | SocketPort *p; |
827d9bf2 | 645 | const char *prefix2, *str; |
5cb5a6ff LP |
646 | |
647 | assert(s); | |
fa068367 | 648 | assert(f); |
5cb5a6ff | 649 | |
4c940960 | 650 | prefix = strempty(prefix); |
63c372cb | 651 | prefix2 = strjoina(prefix, "\t"); |
c43d20a0 | 652 | |
5cb5a6ff LP |
653 | fprintf(f, |
654 | "%sSocket State: %s\n" | |
81a5c6d0 | 655 | "%sResult: %s\n" |
542563ba | 656 | "%sBindIPv6Only: %s\n" |
b5a0699f LP |
657 | "%sBacklog: %u\n" |
658 | "%sSocketMode: %04o\n" | |
4fd5948e LP |
659 | "%sDirectoryMode: %04o\n" |
660 | "%sKeepAlive: %s\n" | |
4427c3f4 | 661 | "%sNoDelay: %s\n" |
cebf8b20 | 662 | "%sFreeBind: %s\n" |
6b6d2dee | 663 | "%sTransparent: %s\n" |
ec6370a2 | 664 | "%sBroadcast: %s\n" |
ede3deb4 | 665 | "%sPassCredentials: %s\n" |
54ecda32 | 666 | "%sPassSecurity: %s\n" |
bd1fe7c7 | 667 | "%sTCPCongestion: %s\n" |
16115b0a | 668 | "%sRemoveOnStop: %s\n" |
55301ec0 | 669 | "%sWritable: %s\n" |
827d9bf2 | 670 | "%sFileDescriptorName: %s\n" |
16115b0a | 671 | "%sSELinuxContextFromNet: %s\n", |
a16e1123 | 672 | prefix, socket_state_to_string(s->state), |
81a5c6d0 | 673 | prefix, socket_result_to_string(s->result), |
c0120d99 | 674 | prefix, socket_address_bind_ipv6_only_to_string(s->bind_ipv6_only), |
b5a0699f LP |
675 | prefix, s->backlog, |
676 | prefix, s->socket_mode, | |
4fd5948e LP |
677 | prefix, s->directory_mode, |
678 | prefix, yes_no(s->keep_alive), | |
4427c3f4 | 679 | prefix, yes_no(s->no_delay), |
cebf8b20 | 680 | prefix, yes_no(s->free_bind), |
6b6d2dee | 681 | prefix, yes_no(s->transparent), |
ec6370a2 | 682 | prefix, yes_no(s->broadcast), |
d68af586 | 683 | prefix, yes_no(s->pass_cred), |
54ecda32 | 684 | prefix, yes_no(s->pass_sec), |
bd1fe7c7 | 685 | prefix, strna(s->tcp_congestion), |
16115b0a | 686 | prefix, yes_no(s->remove_on_stop), |
55301ec0 | 687 | prefix, yes_no(s->writable), |
8dd4c05b | 688 | prefix, socket_fdname(s), |
16115b0a | 689 | prefix, yes_no(s->selinux_context_from_net)); |
542563ba | 690 | |
70123e68 LP |
691 | if (s->control_pid > 0) |
692 | fprintf(f, | |
de0671ee ZJS |
693 | "%sControl PID: "PID_FMT"\n", |
694 | prefix, s->control_pid); | |
70123e68 | 695 | |
acbb0225 LP |
696 | if (s->bind_to_device) |
697 | fprintf(f, | |
698 | "%sBindToDevice: %s\n", | |
699 | prefix, s->bind_to_device); | |
700 | ||
4f2d528d LP |
701 | if (s->accept) |
702 | fprintf(f, | |
6cf6bbc2 LP |
703 | "%sAccepted: %u\n" |
704 | "%sNConnections: %u\n" | |
827d9bf2 YW |
705 | "%sMaxConnections: %u\n" |
706 | "%sMaxConnectionsPerSource: %u\n", | |
6cf6bbc2 LP |
707 | prefix, s->n_accepted, |
708 | prefix, s->n_connections, | |
827d9bf2 YW |
709 | prefix, s->max_connections, |
710 | prefix, s->max_connections_per_source); | |
4f2d528d | 711 | |
4fd5948e LP |
712 | if (s->priority >= 0) |
713 | fprintf(f, | |
714 | "%sPriority: %i\n", | |
715 | prefix, s->priority); | |
716 | ||
717 | if (s->receive_buffer > 0) | |
718 | fprintf(f, | |
719 | "%sReceiveBuffer: %zu\n", | |
720 | prefix, s->receive_buffer); | |
721 | ||
722 | if (s->send_buffer > 0) | |
723 | fprintf(f, | |
724 | "%sSendBuffer: %zu\n", | |
725 | prefix, s->send_buffer); | |
726 | ||
727 | if (s->ip_tos >= 0) | |
728 | fprintf(f, | |
729 | "%sIPTOS: %i\n", | |
730 | prefix, s->ip_tos); | |
731 | ||
732 | if (s->ip_ttl >= 0) | |
733 | fprintf(f, | |
734 | "%sIPTTL: %i\n", | |
735 | prefix, s->ip_ttl); | |
736 | ||
737 | if (s->pipe_size > 0) | |
738 | fprintf(f, | |
739 | "%sPipeSize: %zu\n", | |
740 | prefix, s->pipe_size); | |
741 | ||
742 | if (s->mark >= 0) | |
743 | fprintf(f, | |
744 | "%sMark: %i\n", | |
745 | prefix, s->mark); | |
746 | ||
916abb21 LP |
747 | if (s->mq_maxmsg > 0) |
748 | fprintf(f, | |
749 | "%sMessageQueueMaxMessages: %li\n", | |
750 | prefix, s->mq_maxmsg); | |
751 | ||
752 | if (s->mq_msgsize > 0) | |
753 | fprintf(f, | |
754 | "%sMessageQueueMessageSize: %li\n", | |
755 | prefix, s->mq_msgsize); | |
756 | ||
718db961 | 757 | if (s->reuse_port) |
f7db7a69 SL |
758 | fprintf(f, |
759 | "%sReusePort: %s\n", | |
718db961 | 760 | prefix, yes_no(s->reuse_port)); |
f7db7a69 | 761 | |
0eb59ccf AK |
762 | if (s->smack) |
763 | fprintf(f, | |
764 | "%sSmackLabel: %s\n", | |
765 | prefix, s->smack); | |
766 | ||
767 | if (s->smack_ip_in) | |
768 | fprintf(f, | |
769 | "%sSmackLabelIPIn: %s\n", | |
770 | prefix, s->smack_ip_in); | |
771 | ||
772 | if (s->smack_ip_out) | |
773 | fprintf(f, | |
774 | "%sSmackLabelIPOut: %s\n", | |
775 | prefix, s->smack_ip_out); | |
776 | ||
3900e5fd LP |
777 | if (!isempty(s->user) || !isempty(s->group)) |
778 | fprintf(f, | |
d2a50e3b LP |
779 | "%sSocketUser: %s\n" |
780 | "%sSocketGroup: %s\n", | |
3900e5fd LP |
781 | prefix, strna(s->user), |
782 | prefix, strna(s->group)); | |
783 | ||
3cd761e4 | 784 | if (s->keep_alive_time > 0) |
209e9dcd | 785 | fprintf(f, |
3cd761e4 LP |
786 | "%sKeepAliveTimeSec: %s\n", |
787 | prefix, format_timespan(time_string, FORMAT_TIMESPAN_MAX, s->keep_alive_time, USEC_PER_SEC)); | |
209e9dcd | 788 | |
7be9df7d | 789 | if (s->keep_alive_interval > 0) |
209e9dcd | 790 | fprintf(f, |
3cd761e4 LP |
791 | "%sKeepAliveIntervalSec: %s\n", |
792 | prefix, format_timespan(time_string, FORMAT_TIMESPAN_MAX, s->keep_alive_interval, USEC_PER_SEC)); | |
209e9dcd | 793 | |
7be9df7d | 794 | if (s->keep_alive_cnt > 0) |
209e9dcd SS |
795 | fprintf(f, |
796 | "%sKeepAliveProbes: %u\n", | |
797 | prefix, s->keep_alive_cnt); | |
798 | ||
7be9df7d | 799 | if (s->defer_accept > 0) |
cc567c9b | 800 | fprintf(f, |
3cd761e4 LP |
801 | "%sDeferAcceptSec: %s\n", |
802 | prefix, format_timespan(time_string, FORMAT_TIMESPAN_MAX, s->defer_accept, USEC_PER_SEC)); | |
cc567c9b | 803 | |
034c6ed7 | 804 | LIST_FOREACH(port, p, s->ports) { |
5cb5a6ff | 805 | |
7be9df7d YW |
806 | switch (p->type) { |
807 | case SOCKET_SOCKET: { | |
808 | _cleanup_free_ char *k = NULL; | |
542563ba LP |
809 | const char *t; |
810 | int r; | |
542563ba | 811 | |
e53fc357 LP |
812 | r = socket_address_print(&p->address, &k); |
813 | if (r < 0) | |
542563ba LP |
814 | t = strerror(-r); |
815 | else | |
816 | t = k; | |
817 | ||
7a22745a | 818 | fprintf(f, "%s%s: %s\n", prefix, listen_lookup(socket_address_family(&p->address), p->address.type), t); |
7be9df7d YW |
819 | break; |
820 | } | |
821 | case SOCKET_SPECIAL: | |
b0a3f2bc | 822 | fprintf(f, "%sListenSpecial: %s\n", prefix, p->path); |
7be9df7d YW |
823 | break; |
824 | case SOCKET_USB_FUNCTION: | |
60252446 | 825 | fprintf(f, "%sListenUSBFunction: %s\n", prefix, p->path); |
7be9df7d YW |
826 | break; |
827 | case SOCKET_MQUEUE: | |
916abb21 | 828 | fprintf(f, "%sListenMessageQueue: %s\n", prefix, p->path); |
7be9df7d YW |
829 | break; |
830 | default: | |
542563ba | 831 | fprintf(f, "%sListenFIFO: %s\n", prefix, p->path); |
7be9df7d | 832 | } |
542563ba | 833 | } |
5cb5a6ff | 834 | |
1745fa70 EV |
835 | fprintf(f, |
836 | "%sTriggerLimitIntervalSec: %s\n" | |
837 | "%sTriggerLimitBurst: %u\n", | |
838 | prefix, format_timespan(time_string, FORMAT_TIMESPAN_MAX, s->trigger_limit.interval, USEC_PER_SEC), | |
839 | prefix, s->trigger_limit.burst); | |
840 | ||
827d9bf2 YW |
841 | str = socket_protocol_to_name(s->socket_protocol); |
842 | if (str) | |
843 | fprintf(f, "%sSocketProtocol: %s\n", prefix, str); | |
844 | ||
845 | if (!strv_isempty(s->symlinks)) { | |
846 | char **q; | |
847 | ||
848 | fprintf(f, "%sSymlinks:", prefix); | |
849 | STRV_FOREACH(q, s->symlinks) | |
850 | fprintf(f, " %s", *q); | |
851 | ||
852 | fprintf(f, "\n"); | |
853 | } | |
854 | ||
855 | fprintf(f, | |
856 | "%sTimeoutSec: %s\n", | |
857 | prefix, format_timespan(time_string, FORMAT_TIMESPAN_MAX, s->timeout_usec, USEC_PER_SEC)); | |
858 | ||
5cb5a6ff | 859 | exec_context_dump(&s->exec_context, f, prefix); |
4819ff03 | 860 | kill_context_dump(&s->kill_context, f, prefix); |
5cb5a6ff | 861 | |
e537352b | 862 | for (c = 0; c < _SOCKET_EXEC_COMMAND_MAX; c++) { |
c43d20a0 LP |
863 | if (!s->exec_command[c]) |
864 | continue; | |
5cb5a6ff | 865 | |
40d50879 | 866 | fprintf(f, "%s-> %s:\n", |
a16e1123 | 867 | prefix, socket_exec_command_to_string(c)); |
c43d20a0 LP |
868 | |
869 | exec_command_dump_list(s->exec_command[c], f, prefix2); | |
5cb5a6ff | 870 | } |
18f573aa LP |
871 | |
872 | cgroup_context_dump(&s->cgroup_context, f, prefix); | |
5cb5a6ff LP |
873 | } |
874 | ||
4f2d528d LP |
875 | static int instance_from_socket(int fd, unsigned nr, char **instance) { |
876 | socklen_t l; | |
877 | char *r; | |
9d16d0c7 | 878 | union sockaddr_union local, remote; |
4f2d528d LP |
879 | |
880 | assert(fd >= 0); | |
881 | assert(instance); | |
882 | ||
883 | l = sizeof(local); | |
884 | if (getsockname(fd, &local.sa, &l) < 0) | |
885 | return -errno; | |
886 | ||
887 | l = sizeof(remote); | |
888 | if (getpeername(fd, &remote.sa, &l) < 0) | |
889 | return -errno; | |
890 | ||
891 | switch (local.sa.sa_family) { | |
892 | ||
893 | case AF_INET: { | |
894 | uint32_t | |
8e38570e LP |
895 | a = be32toh(local.in.sin_addr.s_addr), |
896 | b = be32toh(remote.in.sin_addr.s_addr); | |
4f2d528d LP |
897 | |
898 | if (asprintf(&r, | |
77b088c2 LP |
899 | "%u-%u.%u.%u.%u:%u-%u.%u.%u.%u:%u", |
900 | nr, | |
4f2d528d | 901 | a >> 24, (a >> 16) & 0xFF, (a >> 8) & 0xFF, a & 0xFF, |
8e38570e | 902 | be16toh(local.in.sin_port), |
4f2d528d | 903 | b >> 24, (b >> 16) & 0xFF, (b >> 8) & 0xFF, b & 0xFF, |
8e38570e | 904 | be16toh(remote.in.sin_port)) < 0) |
4f2d528d LP |
905 | return -ENOMEM; |
906 | ||
907 | break; | |
908 | } | |
909 | ||
910 | case AF_INET6: { | |
c65a0b14 | 911 | static const unsigned char ipv4_prefix[] = { |
2b061f5a LP |
912 | 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0xFF, 0xFF |
913 | }; | |
914 | ||
915 | if (memcmp(&local.in6.sin6_addr, ipv4_prefix, sizeof(ipv4_prefix)) == 0 && | |
916 | memcmp(&remote.in6.sin6_addr, ipv4_prefix, sizeof(ipv4_prefix)) == 0) { | |
917 | const uint8_t | |
918 | *a = local.in6.sin6_addr.s6_addr+12, | |
919 | *b = remote.in6.sin6_addr.s6_addr+12; | |
920 | ||
921 | if (asprintf(&r, | |
77b088c2 LP |
922 | "%u-%u.%u.%u.%u:%u-%u.%u.%u.%u:%u", |
923 | nr, | |
2b061f5a | 924 | a[0], a[1], a[2], a[3], |
8e38570e | 925 | be16toh(local.in6.sin6_port), |
2b061f5a | 926 | b[0], b[1], b[2], b[3], |
8e38570e | 927 | be16toh(remote.in6.sin6_port)) < 0) |
2b061f5a LP |
928 | return -ENOMEM; |
929 | } else { | |
930 | char a[INET6_ADDRSTRLEN], b[INET6_ADDRSTRLEN]; | |
931 | ||
932 | if (asprintf(&r, | |
77b088c2 LP |
933 | "%u-%s:%u-%s:%u", |
934 | nr, | |
2b061f5a | 935 | inet_ntop(AF_INET6, &local.in6.sin6_addr, a, sizeof(a)), |
8e38570e | 936 | be16toh(local.in6.sin6_port), |
2b061f5a | 937 | inet_ntop(AF_INET6, &remote.in6.sin6_addr, b, sizeof(b)), |
8e38570e | 938 | be16toh(remote.in6.sin6_port)) < 0) |
2b061f5a LP |
939 | return -ENOMEM; |
940 | } | |
4f2d528d LP |
941 | |
942 | break; | |
943 | } | |
944 | ||
945 | case AF_UNIX: { | |
946 | struct ucred ucred; | |
eff05270 | 947 | int k; |
4f2d528d | 948 | |
eff05270 | 949 | k = getpeercred(fd, &ucred); |
d38f6e34 ZJS |
950 | if (k >= 0) { |
951 | if (asprintf(&r, | |
952 | "%u-"PID_FMT"-"UID_FMT, | |
953 | nr, ucred.pid, ucred.uid) < 0) | |
954 | return -ENOMEM; | |
955 | } else if (k == -ENODATA) { | |
956 | /* This handles the case where somebody is | |
957 | * connecting from another pid/uid namespace | |
958 | * (e.g. from outside of our container). */ | |
959 | if (asprintf(&r, | |
960 | "%u-unknown", | |
961 | nr) < 0) | |
962 | return -ENOMEM; | |
963 | } else | |
eff05270 | 964 | return k; |
2f20a8eb | 965 | |
2f20a8eb | 966 | break; |
4f2d528d LP |
967 | } |
968 | ||
359a5bcf SH |
969 | case AF_VSOCK: |
970 | if (asprintf(&r, | |
971 | "%u-%u:%u-%u:%u", | |
972 | nr, | |
973 | local.vm.svm_cid, local.vm.svm_port, | |
974 | remote.vm.svm_cid, remote.vm.svm_port) < 0) | |
975 | return -ENOMEM; | |
976 | ||
977 | break; | |
978 | ||
4f2d528d LP |
979 | default: |
980 | assert_not_reached("Unhandled socket type."); | |
981 | } | |
982 | ||
983 | *instance = r; | |
984 | return 0; | |
985 | } | |
986 | ||
034c6ed7 | 987 | static void socket_close_fds(Socket *s) { |
83c60c9f | 988 | SocketPort *p; |
811ba7a0 | 989 | char **i; |
83c60c9f LP |
990 | |
991 | assert(s); | |
992 | ||
034c6ed7 | 993 | LIST_FOREACH(port, p, s->ports) { |
18e854f8 | 994 | bool was_open; |
718db961 | 995 | |
18e854f8 | 996 | was_open = p->fd >= 0; |
83c60c9f | 997 | |
18e854f8 | 998 | p->event_source = sd_event_source_unref(p->event_source); |
03e334a1 | 999 | p->fd = safe_close(p->fd); |
15087cdb | 1000 | socket_cleanup_fd_list(p); |
a16e1123 | 1001 | |
18e854f8 LP |
1002 | /* One little note: we should normally not delete any sockets in the file system here! After all some |
1003 | * other process we spawned might still have a reference of this fd and wants to continue to use | |
1004 | * it. Therefore we normally delete sockets in the file system before we create a new one, not after we | |
1005 | * stopped using one! That all said, if the user explicitly requested this, we'll delete them here | |
1006 | * anyway, but only then. */ | |
bd1fe7c7 | 1007 | |
18e854f8 LP |
1008 | if (!was_open || !s->remove_on_stop) |
1009 | continue; | |
1010 | ||
1011 | switch (p->type) { | |
bd1fe7c7 | 1012 | |
18e854f8 LP |
1013 | case SOCKET_FIFO: |
1014 | (void) unlink(p->path); | |
1015 | break; | |
bd1fe7c7 | 1016 | |
18e854f8 LP |
1017 | case SOCKET_MQUEUE: |
1018 | (void) mq_unlink(p->path); | |
1019 | break; | |
bd1fe7c7 | 1020 | |
18e854f8 LP |
1021 | case SOCKET_SOCKET: |
1022 | (void) socket_address_unlink(&p->address); | |
1023 | break; | |
bd1fe7c7 | 1024 | |
18e854f8 LP |
1025 | default: |
1026 | break; | |
bd1fe7c7 | 1027 | } |
83c60c9f | 1028 | } |
811ba7a0 LP |
1029 | |
1030 | if (s->remove_on_stop) | |
1031 | STRV_FOREACH(i, s->symlinks) | |
18e854f8 | 1032 | (void) unlink(*i); |
83c60c9f LP |
1033 | } |
1034 | ||
4fd5948e | 1035 | static void socket_apply_socket_options(Socket *s, int fd) { |
d53e386d LP |
1036 | int r; |
1037 | ||
4fd5948e LP |
1038 | assert(s); |
1039 | assert(fd >= 0); | |
1040 | ||
1041 | if (s->keep_alive) { | |
7be9df7d YW |
1042 | int one = 1; |
1043 | if (setsockopt(fd, SOL_SOCKET, SO_KEEPALIVE, &one, sizeof(one)) < 0) | |
f2341e0a | 1044 | log_unit_warning_errno(UNIT(s), errno, "SO_KEEPALIVE failed: %m"); |
4fd5948e LP |
1045 | } |
1046 | ||
7be9df7d | 1047 | if (s->keep_alive_time > 0) { |
209e9dcd SS |
1048 | int value = s->keep_alive_time / USEC_PER_SEC; |
1049 | if (setsockopt(fd, SOL_TCP, TCP_KEEPIDLE, &value, sizeof(value)) < 0) | |
f2341e0a | 1050 | log_unit_warning_errno(UNIT(s), errno, "TCP_KEEPIDLE failed: %m"); |
209e9dcd SS |
1051 | } |
1052 | ||
7be9df7d | 1053 | if (s->keep_alive_interval > 0) { |
920b52e4 | 1054 | int value = s->keep_alive_interval / USEC_PER_SEC; |
209e9dcd | 1055 | if (setsockopt(fd, SOL_TCP, TCP_KEEPINTVL, &value, sizeof(value)) < 0) |
f2341e0a | 1056 | log_unit_warning_errno(UNIT(s), errno, "TCP_KEEPINTVL failed: %m"); |
209e9dcd SS |
1057 | } |
1058 | ||
7be9df7d | 1059 | if (s->keep_alive_cnt > 0) { |
209e9dcd | 1060 | int value = s->keep_alive_cnt; |
172cfe87 | 1061 | if (setsockopt(fd, SOL_TCP, TCP_KEEPCNT, &value, sizeof(value)) < 0) |
f2341e0a | 1062 | log_unit_warning_errno(UNIT(s), errno, "TCP_KEEPCNT failed: %m"); |
209e9dcd SS |
1063 | } |
1064 | ||
7be9df7d | 1065 | if (s->defer_accept > 0) { |
cc567c9b SS |
1066 | int value = s->defer_accept / USEC_PER_SEC; |
1067 | if (setsockopt(fd, SOL_TCP, TCP_DEFER_ACCEPT, &value, sizeof(value)) < 0) | |
f2341e0a | 1068 | log_unit_warning_errno(UNIT(s), errno, "TCP_DEFER_ACCEPT failed: %m"); |
cc567c9b SS |
1069 | } |
1070 | ||
4427c3f4 | 1071 | if (s->no_delay) { |
7be9df7d | 1072 | int one = 1; |
62bc4efc SS |
1073 | |
1074 | if (s->socket_protocol == IPPROTO_SCTP) { | |
7be9df7d | 1075 | if (setsockopt(fd, SOL_SCTP, SCTP_NODELAY, &one, sizeof(one)) < 0) |
62bc4efc SS |
1076 | log_unit_warning_errno(UNIT(s), errno, "SCTP_NODELAY failed: %m"); |
1077 | } else { | |
7be9df7d | 1078 | if (setsockopt(fd, SOL_TCP, TCP_NODELAY, &one, sizeof(one)) < 0) |
62bc4efc SS |
1079 | log_unit_warning_errno(UNIT(s), errno, "TCP_NODELAY failed: %m"); |
1080 | } | |
4427c3f4 SS |
1081 | } |
1082 | ||
ec6370a2 LP |
1083 | if (s->broadcast) { |
1084 | int one = 1; | |
1085 | if (setsockopt(fd, SOL_SOCKET, SO_BROADCAST, &one, sizeof(one)) < 0) | |
f2341e0a | 1086 | log_unit_warning_errno(UNIT(s), errno, "SO_BROADCAST failed: %m"); |
ec6370a2 LP |
1087 | } |
1088 | ||
d68af586 MS |
1089 | if (s->pass_cred) { |
1090 | int one = 1; | |
1091 | if (setsockopt(fd, SOL_SOCKET, SO_PASSCRED, &one, sizeof(one)) < 0) | |
f2341e0a | 1092 | log_unit_warning_errno(UNIT(s), errno, "SO_PASSCRED failed: %m"); |
d68af586 MS |
1093 | } |
1094 | ||
54ecda32 LP |
1095 | if (s->pass_sec) { |
1096 | int one = 1; | |
1097 | if (setsockopt(fd, SOL_SOCKET, SO_PASSSEC, &one, sizeof(one)) < 0) | |
f2341e0a | 1098 | log_unit_warning_errno(UNIT(s), errno, "SO_PASSSEC failed: %m"); |
54ecda32 LP |
1099 | } |
1100 | ||
4fd5948e LP |
1101 | if (s->priority >= 0) |
1102 | if (setsockopt(fd, SOL_SOCKET, SO_PRIORITY, &s->priority, sizeof(s->priority)) < 0) | |
f2341e0a | 1103 | log_unit_warning_errno(UNIT(s), errno, "SO_PRIORITY failed: %m"); |
4fd5948e LP |
1104 | |
1105 | if (s->receive_buffer > 0) { | |
1106 | int value = (int) s->receive_buffer; | |
7d9eaa84 LP |
1107 | |
1108 | /* We first try with SO_RCVBUFFORCE, in case we have the perms for that */ | |
b8cef44e | 1109 | if (setsockopt(fd, SOL_SOCKET, SO_RCVBUFFORCE, &value, sizeof(value)) < 0) |
7d9eaa84 | 1110 | if (setsockopt(fd, SOL_SOCKET, SO_RCVBUF, &value, sizeof(value)) < 0) |
f2341e0a | 1111 | log_unit_warning_errno(UNIT(s), errno, "SO_RCVBUF failed: %m"); |
4fd5948e LP |
1112 | } |
1113 | ||
1114 | if (s->send_buffer > 0) { | |
1115 | int value = (int) s->send_buffer; | |
b8cef44e | 1116 | if (setsockopt(fd, SOL_SOCKET, SO_SNDBUFFORCE, &value, sizeof(value)) < 0) |
7d9eaa84 | 1117 | if (setsockopt(fd, SOL_SOCKET, SO_SNDBUF, &value, sizeof(value)) < 0) |
f2341e0a | 1118 | log_unit_warning_errno(UNIT(s), errno, "SO_SNDBUF failed: %m"); |
4fd5948e LP |
1119 | } |
1120 | ||
1121 | if (s->mark >= 0) | |
1122 | if (setsockopt(fd, SOL_SOCKET, SO_MARK, &s->mark, sizeof(s->mark)) < 0) | |
f2341e0a | 1123 | log_unit_warning_errno(UNIT(s), errno, "SO_MARK failed: %m"); |
4fd5948e LP |
1124 | |
1125 | if (s->ip_tos >= 0) | |
1126 | if (setsockopt(fd, IPPROTO_IP, IP_TOS, &s->ip_tos, sizeof(s->ip_tos)) < 0) | |
f2341e0a | 1127 | log_unit_warning_errno(UNIT(s), errno, "IP_TOS failed: %m"); |
4fd5948e | 1128 | |
46925ac5 | 1129 | if (s->ip_ttl >= 0) { |
d53e386d | 1130 | int x; |
46925ac5 LP |
1131 | |
1132 | r = setsockopt(fd, IPPROTO_IP, IP_TTL, &s->ip_ttl, sizeof(s->ip_ttl)); | |
5bfcc1c6 FF |
1133 | |
1134 | if (socket_ipv6_is_supported()) | |
1135 | x = setsockopt(fd, IPPROTO_IPV6, IPV6_UNICAST_HOPS, &s->ip_ttl, sizeof(s->ip_ttl)); | |
1136 | else { | |
1137 | x = -1; | |
1138 | errno = EAFNOSUPPORT; | |
1139 | } | |
46925ac5 LP |
1140 | |
1141 | if (r < 0 && x < 0) | |
f2341e0a | 1142 | log_unit_warning_errno(UNIT(s), errno, "IP_TTL/IPV6_UNICAST_HOPS failed: %m"); |
46925ac5 | 1143 | } |
cebf8b20 TT |
1144 | |
1145 | if (s->tcp_congestion) | |
1146 | if (setsockopt(fd, SOL_TCP, TCP_CONGESTION, s->tcp_congestion, strlen(s->tcp_congestion)+1) < 0) | |
f2341e0a | 1147 | log_unit_warning_errno(UNIT(s), errno, "TCP_CONGESTION failed: %m"); |
0eb59ccf | 1148 | |
d53e386d | 1149 | if (s->smack_ip_in) { |
5ab58c20 | 1150 | r = mac_smack_apply_fd(fd, SMACK_ATTR_IPIN, s->smack_ip_in); |
d53e386d | 1151 | if (r < 0) |
f2341e0a | 1152 | log_unit_error_errno(UNIT(s), r, "mac_smack_apply_ip_in_fd: %m"); |
d53e386d | 1153 | } |
9a4e038c | 1154 | |
d53e386d | 1155 | if (s->smack_ip_out) { |
5ab58c20 | 1156 | r = mac_smack_apply_fd(fd, SMACK_ATTR_IPOUT, s->smack_ip_out); |
d53e386d | 1157 | if (r < 0) |
f2341e0a | 1158 | log_unit_error_errno(UNIT(s), r, "mac_smack_apply_ip_out_fd: %m"); |
d53e386d | 1159 | } |
4fd5948e LP |
1160 | } |
1161 | ||
b15bdda8 | 1162 | static void socket_apply_fifo_options(Socket *s, int fd) { |
d53e386d LP |
1163 | int r; |
1164 | ||
4fd5948e LP |
1165 | assert(s); |
1166 | assert(fd >= 0); | |
1167 | ||
1168 | if (s->pipe_size > 0) | |
1169 | if (fcntl(fd, F_SETPIPE_SZ, s->pipe_size) < 0) | |
ed460b07 | 1170 | log_unit_warning_errno(UNIT(s), errno, "Setting pipe size failed, ignoring: %m"); |
0eb59ccf | 1171 | |
d53e386d | 1172 | if (s->smack) { |
5ab58c20 | 1173 | r = mac_smack_apply_fd(fd, SMACK_ATTR_ACCESS, s->smack); |
d53e386d | 1174 | if (r < 0) |
ed460b07 | 1175 | log_unit_error_errno(UNIT(s), r, "SMACK relabelling failed, ignoring: %m"); |
d53e386d | 1176 | } |
4fd5948e LP |
1177 | } |
1178 | ||
b15bdda8 LP |
1179 | static int fifo_address_create( |
1180 | const char *path, | |
1181 | mode_t directory_mode, | |
e8da24a6 | 1182 | mode_t socket_mode) { |
b15bdda8 | 1183 | |
e8da24a6 | 1184 | _cleanup_close_ int fd = -1; |
b15bdda8 | 1185 | mode_t old_mask; |
e8da24a6 LP |
1186 | struct stat st; |
1187 | int r; | |
b15bdda8 LP |
1188 | |
1189 | assert(path); | |
b15bdda8 | 1190 | |
1af87ab7 | 1191 | (void) mkdir_parents_label(path, directory_mode); |
b15bdda8 | 1192 | |
ecabcf8b | 1193 | r = mac_selinux_create_file_prepare(path, S_IFIFO); |
e9a5ef7c | 1194 | if (r < 0) |
e8da24a6 | 1195 | return r; |
b15bdda8 LP |
1196 | |
1197 | /* Enforce the right access mode for the fifo */ | |
7be9df7d | 1198 | old_mask = umask(~socket_mode); |
b15bdda8 LP |
1199 | |
1200 | /* Include the original umask in our mask */ | |
e8da24a6 | 1201 | (void) umask(~socket_mode | old_mask); |
b15bdda8 LP |
1202 | |
1203 | r = mkfifo(path, socket_mode); | |
e8da24a6 | 1204 | (void) umask(old_mask); |
b15bdda8 | 1205 | |
94bc2731 | 1206 | if (r < 0 && errno != EEXIST) { |
b15bdda8 LP |
1207 | r = -errno; |
1208 | goto fail; | |
1209 | } | |
1210 | ||
e8da24a6 | 1211 | fd = open(path, O_RDWR | O_CLOEXEC | O_NOCTTY | O_NONBLOCK | O_NOFOLLOW); |
3cc2aff1 | 1212 | if (fd < 0) { |
b15bdda8 LP |
1213 | r = -errno; |
1214 | goto fail; | |
1215 | } | |
1216 | ||
ecabcf8b | 1217 | mac_selinux_create_file_clear(); |
7a58bfa4 | 1218 | |
b15bdda8 LP |
1219 | if (fstat(fd, &st) < 0) { |
1220 | r = -errno; | |
1221 | goto fail; | |
1222 | } | |
1223 | ||
1224 | if (!S_ISFIFO(st.st_mode) || | |
de0200fc | 1225 | (st.st_mode & 0777) != (socket_mode & ~old_mask) || |
e4f44e73 DR |
1226 | st.st_uid != getuid() || |
1227 | st.st_gid != getgid()) { | |
b15bdda8 LP |
1228 | r = -EEXIST; |
1229 | goto fail; | |
1230 | } | |
1231 | ||
c10d6bdb | 1232 | return TAKE_FD(fd); |
b15bdda8 LP |
1233 | |
1234 | fail: | |
ecabcf8b | 1235 | mac_selinux_create_file_clear(); |
b15bdda8 LP |
1236 | return r; |
1237 | } | |
1238 | ||
55301ec0 | 1239 | static int special_address_create(const char *path, bool writable) { |
e8da24a6 | 1240 | _cleanup_close_ int fd = -1; |
b0a3f2bc LP |
1241 | struct stat st; |
1242 | ||
1243 | assert(path); | |
b0a3f2bc | 1244 | |
55301ec0 | 1245 | fd = open(path, (writable ? O_RDWR : O_RDONLY)|O_CLOEXEC|O_NOCTTY|O_NONBLOCK|O_NOFOLLOW); |
e8da24a6 LP |
1246 | if (fd < 0) |
1247 | return -errno; | |
b0a3f2bc | 1248 | |
e8da24a6 LP |
1249 | if (fstat(fd, &st) < 0) |
1250 | return -errno; | |
b0a3f2bc LP |
1251 | |
1252 | /* Check whether this is a /proc, /sys or /dev file or char device */ | |
e8da24a6 LP |
1253 | if (!S_ISREG(st.st_mode) && !S_ISCHR(st.st_mode)) |
1254 | return -EEXIST; | |
b0a3f2bc | 1255 | |
c10d6bdb | 1256 | return TAKE_FD(fd); |
b0a3f2bc LP |
1257 | } |
1258 | ||
36078102 | 1259 | static int usbffs_address_create(const char *path) { |
60252446 PS |
1260 | _cleanup_close_ int fd = -1; |
1261 | struct stat st; | |
1262 | ||
1263 | assert(path); | |
60252446 PS |
1264 | |
1265 | fd = open(path, O_RDWR|O_CLOEXEC|O_NOCTTY|O_NONBLOCK|O_NOFOLLOW); | |
1266 | if (fd < 0) | |
1267 | return -errno; | |
1268 | ||
1269 | if (fstat(fd, &st) < 0) | |
1270 | return -errno; | |
1271 | ||
13e785f7 | 1272 | /* Check whether this is a regular file (ffs endpoint) */ |
60252446 PS |
1273 | if (!S_ISREG(st.st_mode)) |
1274 | return -EEXIST; | |
1275 | ||
c10d6bdb | 1276 | return TAKE_FD(fd); |
60252446 PS |
1277 | } |
1278 | ||
916abb21 LP |
1279 | static int mq_address_create( |
1280 | const char *path, | |
1281 | mode_t mq_mode, | |
1282 | long maxmsg, | |
e8da24a6 | 1283 | long msgsize) { |
916abb21 | 1284 | |
e8da24a6 | 1285 | _cleanup_close_ int fd = -1; |
916abb21 LP |
1286 | struct stat st; |
1287 | mode_t old_mask; | |
1288 | struct mq_attr _attr, *attr = NULL; | |
1289 | ||
1290 | assert(path); | |
916abb21 LP |
1291 | |
1292 | if (maxmsg > 0 && msgsize > 0) { | |
e8da24a6 LP |
1293 | _attr = (struct mq_attr) { |
1294 | .mq_flags = O_NONBLOCK, | |
1295 | .mq_maxmsg = maxmsg, | |
1296 | .mq_msgsize = msgsize, | |
1297 | }; | |
916abb21 LP |
1298 | attr = &_attr; |
1299 | } | |
1300 | ||
1301 | /* Enforce the right access mode for the mq */ | |
7be9df7d | 1302 | old_mask = umask(~mq_mode); |
916abb21 LP |
1303 | |
1304 | /* Include the original umask in our mask */ | |
e8da24a6 | 1305 | (void) umask(~mq_mode | old_mask); |
916abb21 | 1306 | fd = mq_open(path, O_RDONLY|O_CLOEXEC|O_NONBLOCK|O_CREAT, mq_mode, attr); |
e8da24a6 | 1307 | (void) umask(old_mask); |
916abb21 | 1308 | |
e8da24a6 LP |
1309 | if (fd < 0) |
1310 | return -errno; | |
916abb21 | 1311 | |
e8da24a6 LP |
1312 | if (fstat(fd, &st) < 0) |
1313 | return -errno; | |
916abb21 LP |
1314 | |
1315 | if ((st.st_mode & 0777) != (mq_mode & ~old_mask) || | |
1316 | st.st_uid != getuid() || | |
e8da24a6 LP |
1317 | st.st_gid != getgid()) |
1318 | return -EEXIST; | |
916abb21 | 1319 | |
c10d6bdb | 1320 | return TAKE_FD(fd); |
916abb21 LP |
1321 | } |
1322 | ||
811ba7a0 LP |
1323 | static int socket_symlink(Socket *s) { |
1324 | const char *p; | |
1325 | char **i; | |
95f7fbbf | 1326 | int r; |
811ba7a0 LP |
1327 | |
1328 | assert(s); | |
1329 | ||
1330 | p = socket_find_symlink_target(s); | |
1331 | if (!p) | |
1332 | return 0; | |
1333 | ||
95f7fbbf | 1334 | STRV_FOREACH(i, s->symlinks) { |
1af87ab7 LP |
1335 | (void) mkdir_parents_label(*i, s->directory_mode); |
1336 | ||
95f7fbbf | 1337 | r = symlink_idempotent(p, *i); |
22b20752 LP |
1338 | |
1339 | if (r == -EEXIST && s->remove_on_stop) { | |
1340 | /* If there's already something where we want to create the symlink, and the destructive | |
1341 | * RemoveOnStop= mode is set, then we might as well try to remove what already exists and try | |
1342 | * again. */ | |
1343 | ||
1344 | if (unlink(*i) >= 0) | |
1345 | r = symlink_idempotent(p, *i); | |
1346 | } | |
1347 | ||
95f7fbbf LP |
1348 | if (r < 0) |
1349 | log_unit_warning_errno(UNIT(s), r, "Failed to create symlink %s → %s, ignoring: %m", p, *i); | |
1350 | } | |
811ba7a0 LP |
1351 | |
1352 | return 0; | |
1353 | } | |
1354 | ||
36078102 | 1355 | static int usbffs_write_descs(int fd, Service *s) { |
6b7e5923 PS |
1356 | int r; |
1357 | ||
1358 | if (!s->usb_function_descriptors || !s->usb_function_strings) | |
1359 | return -EINVAL; | |
1360 | ||
1c876927 | 1361 | r = copy_file_fd(s->usb_function_descriptors, fd, 0); |
6b7e5923 | 1362 | if (r < 0) |
e8da24a6 | 1363 | return r; |
6b7e5923 | 1364 | |
1c876927 | 1365 | return copy_file_fd(s->usb_function_strings, fd, 0); |
6b7e5923 PS |
1366 | } |
1367 | ||
36078102 | 1368 | static int usbffs_select_ep(const struct dirent *d) { |
60252446 PS |
1369 | return d->d_name[0] != '.' && !streq(d->d_name, "ep0"); |
1370 | } | |
1371 | ||
36078102 | 1372 | static int usbffs_dispatch_eps(SocketPort *p) { |
60252446 | 1373 | _cleanup_free_ struct dirent **ent = NULL; |
da6053d0 LP |
1374 | size_t n, k, i; |
1375 | int r; | |
60252446 | 1376 | |
00bb64ec | 1377 | r = scandir(p->path, &ent, usbffs_select_ep, alphasort); |
60252446 PS |
1378 | if (r < 0) |
1379 | return -errno; | |
1380 | ||
da6053d0 | 1381 | n = (size_t) r; |
60252446 PS |
1382 | p->auxiliary_fds = new(int, n); |
1383 | if (!p->auxiliary_fds) | |
1384 | return -ENOMEM; | |
1385 | ||
1386 | p->n_auxiliary_fds = n; | |
1387 | ||
1388 | k = 0; | |
1389 | for (i = 0; i < n; ++i) { | |
1390 | _cleanup_free_ char *ep = NULL; | |
1391 | ||
00bb64ec | 1392 | ep = path_make_absolute(ent[i]->d_name, p->path); |
60252446 PS |
1393 | if (!ep) |
1394 | return -ENOMEM; | |
1395 | ||
858d36c1 | 1396 | path_simplify(ep, false); |
60252446 | 1397 | |
36078102 | 1398 | r = usbffs_address_create(ep); |
60252446 PS |
1399 | if (r < 0) |
1400 | goto fail; | |
1401 | ||
da6053d0 | 1402 | p->auxiliary_fds[k++] = r; |
60252446 PS |
1403 | free(ent[i]); |
1404 | } | |
1405 | ||
1406 | return r; | |
1407 | ||
1408 | fail: | |
e8da24a6 | 1409 | close_many(p->auxiliary_fds, k); |
60252446 PS |
1410 | p->auxiliary_fds = mfree(p->auxiliary_fds); |
1411 | p->n_auxiliary_fds = 0; | |
1412 | ||
1413 | return r; | |
1414 | } | |
1415 | ||
d24e561d | 1416 | static int socket_determine_selinux_label(Socket *s, char **ret) { |
416be1a0 | 1417 | Service *service; |
d24e561d | 1418 | ExecCommand *c; |
2ef044ea | 1419 | _cleanup_free_ char *path = NULL; |
d24e561d LP |
1420 | int r; |
1421 | ||
1422 | assert(s); | |
1423 | assert(ret); | |
1424 | ||
1425 | if (s->selinux_context_from_net) { | |
1426 | /* If this is requested, get label from the network label */ | |
1427 | ||
1428 | r = mac_selinux_get_our_label(ret); | |
1429 | if (r == -EOPNOTSUPP) | |
1430 | goto no_label; | |
1431 | ||
1432 | } else { | |
1433 | /* Otherwise, get it from the executable we are about to start */ | |
1434 | r = socket_instantiate_service(s); | |
1435 | if (r < 0) | |
1436 | return r; | |
1437 | ||
1438 | if (!UNIT_ISSET(s->service)) | |
1439 | goto no_label; | |
1440 | ||
416be1a0 FB |
1441 | service = SERVICE(UNIT_DEREF(s->service)); |
1442 | c = service->exec_command[SERVICE_EXEC_START]; | |
d24e561d LP |
1443 | if (!c) |
1444 | goto no_label; | |
1445 | ||
2ef044ea FB |
1446 | r = chase_symlinks(c->path, service->exec_context.root_directory, CHASE_PREFIX_ROOT, &path); |
1447 | if (r < 0) | |
1448 | goto no_label; | |
1449 | ||
416be1a0 | 1450 | r = mac_selinux_get_create_label_from_exe(path, ret); |
4c701096 | 1451 | if (IN_SET(r, -EPERM, -EOPNOTSUPP)) |
d24e561d LP |
1452 | goto no_label; |
1453 | } | |
1454 | ||
1455 | return r; | |
1456 | ||
1457 | no_label: | |
1458 | *ret = NULL; | |
1459 | return 0; | |
1460 | } | |
1461 | ||
a79279c7 LP |
1462 | static int socket_address_listen_do( |
1463 | Socket *s, | |
1464 | const SocketAddress *address, | |
1465 | const char *label) { | |
1466 | ||
1467 | assert(s); | |
1468 | assert(address); | |
1469 | ||
1470 | return socket_address_listen( | |
1471 | address, | |
1472 | SOCK_CLOEXEC|SOCK_NONBLOCK, | |
1473 | s->backlog, | |
1474 | s->bind_ipv6_only, | |
1475 | s->bind_to_device, | |
1476 | s->reuse_port, | |
1477 | s->free_bind, | |
1478 | s->transparent, | |
1479 | s->directory_mode, | |
1480 | s->socket_mode, | |
1481 | label); | |
1482 | } | |
1483 | ||
1484 | static int socket_address_listen_in_cgroup( | |
1485 | Socket *s, | |
1486 | const SocketAddress *address, | |
1487 | const char *label) { | |
1488 | ||
1489 | _cleanup_close_pair_ int pair[2] = { -1, -1 }; | |
1490 | int fd, r; | |
1491 | pid_t pid; | |
1492 | ||
1493 | assert(s); | |
1494 | assert(address); | |
1495 | ||
1496 | /* This is a wrapper around socket_address_listen(), that forks off a helper process inside the socket's cgroup | |
1497 | * in which the socket is actually created. This way we ensure the socket is actually properly attached to the | |
1498 | * unit's cgroup for the purpose of BPF filtering and such. */ | |
1499 | ||
1500 | if (!IN_SET(address->sockaddr.sa.sa_family, AF_INET, AF_INET6)) | |
1501 | goto shortcut; /* BPF filtering only applies to IPv4 + IPv6, shortcut things for other protocols */ | |
1502 | ||
1503 | r = bpf_firewall_supported(); | |
1504 | if (r < 0) | |
1505 | return r; | |
2ae7ee58 | 1506 | if (r == BPF_FIREWALL_UNSUPPORTED) /* If BPF firewalling isn't supported anyway — there's no point in this forking complexity */ |
a79279c7 LP |
1507 | goto shortcut; |
1508 | ||
1509 | if (socketpair(AF_UNIX, SOCK_SEQPACKET|SOCK_CLOEXEC, 0, pair) < 0) | |
1510 | return log_unit_error_errno(UNIT(s), errno, "Failed to create communication channel: %m"); | |
1511 | ||
4c253ed1 | 1512 | r = unit_fork_helper_process(UNIT(s), "(sd-listen)", &pid); |
a79279c7 LP |
1513 | if (r < 0) |
1514 | return log_unit_error_errno(UNIT(s), r, "Failed to fork off listener stub process: %m"); | |
1515 | if (r == 0) { | |
1516 | /* Child */ | |
1517 | ||
1518 | pair[0] = safe_close(pair[0]); | |
1519 | ||
1520 | fd = socket_address_listen_do(s, address, label); | |
1521 | if (fd < 0) { | |
1522 | log_unit_error_errno(UNIT(s), fd, "Failed to create listening socket: %m"); | |
1523 | _exit(EXIT_FAILURE); | |
1524 | } | |
1525 | ||
1526 | r = send_one_fd(pair[1], fd, 0); | |
1527 | if (r < 0) { | |
1528 | log_unit_error_errno(UNIT(s), r, "Failed to send listening socket to parent: %m"); | |
1529 | _exit(EXIT_FAILURE); | |
1530 | } | |
1531 | ||
1532 | _exit(EXIT_SUCCESS); | |
1533 | } | |
1534 | ||
1535 | pair[1] = safe_close(pair[1]); | |
1536 | fd = receive_one_fd(pair[0], 0); | |
1537 | ||
1538 | /* We synchronously wait for the helper, as it shouldn't be slow */ | |
d2e0ac3d | 1539 | r = wait_for_terminate_and_check("(sd-listen)", pid, WAIT_LOG_ABNORMAL); |
a79279c7 LP |
1540 | if (r < 0) { |
1541 | safe_close(fd); | |
1542 | return r; | |
1543 | } | |
1544 | ||
1545 | if (fd < 0) | |
1546 | return log_unit_error_errno(UNIT(s), fd, "Failed to receive listening socket: %m"); | |
1547 | ||
1548 | return fd; | |
1549 | ||
1550 | shortcut: | |
1551 | fd = socket_address_listen_do(s, address, label); | |
1552 | if (fd < 0) | |
1553 | return log_error_errno(fd, "Failed to create listening socket: %m"); | |
1554 | ||
1555 | return fd; | |
1556 | } | |
1557 | ||
034c6ed7 | 1558 | static int socket_open_fds(Socket *s) { |
710a6b50 LP |
1559 | _cleanup_(mac_selinux_freep) char *label = NULL; |
1560 | bool know_label = false; | |
83c60c9f LP |
1561 | SocketPort *p; |
1562 | int r; | |
1563 | ||
1564 | assert(s); | |
1565 | ||
034c6ed7 | 1566 | LIST_FOREACH(port, p, s->ports) { |
83c60c9f | 1567 | |
034c6ed7 LP |
1568 | if (p->fd >= 0) |
1569 | continue; | |
83c60c9f | 1570 | |
00411a13 LP |
1571 | switch (p->type) { |
1572 | ||
1573 | case SOCKET_SOCKET: | |
049f8642 | 1574 | |
7f416dae | 1575 | if (!know_label) { |
d24e561d LP |
1576 | /* Figure out label, if we don't it know yet. We do it once, for the first socket where |
1577 | * we need this and remember it for the rest. */ | |
7f416dae | 1578 | |
d24e561d LP |
1579 | r = socket_determine_selinux_label(s, &label); |
1580 | if (r < 0) | |
1581 | goto rollback; | |
049f8642 LP |
1582 | |
1583 | know_label = true; | |
1584 | } | |
1585 | ||
74bb646e | 1586 | /* Apply the socket protocol */ |
d24e561d | 1587 | switch (p->address.type) { |
d2a50e3b | 1588 | |
74bb646e SS |
1589 | case SOCK_STREAM: |
1590 | case SOCK_SEQPACKET: | |
d24e561d LP |
1591 | if (s->socket_protocol == IPPROTO_SCTP) |
1592 | p->address.protocol = s->socket_protocol; | |
74bb646e | 1593 | break; |
d2a50e3b | 1594 | |
74bb646e | 1595 | case SOCK_DGRAM: |
d24e561d LP |
1596 | if (s->socket_protocol == IPPROTO_UDPLITE) |
1597 | p->address.protocol = s->socket_protocol; | |
74bb646e SS |
1598 | break; |
1599 | } | |
1600 | ||
a79279c7 | 1601 | r = socket_address_listen_in_cgroup(s, &p->address, label); |
175a3d25 | 1602 | if (r < 0) |
83c60c9f LP |
1603 | goto rollback; |
1604 | ||
175a3d25 | 1605 | p->fd = r; |
4fd5948e | 1606 | socket_apply_socket_options(s, p->fd); |
811ba7a0 | 1607 | socket_symlink(s); |
00411a13 | 1608 | break; |
4fd5948e | 1609 | |
00411a13 | 1610 | case SOCKET_SPECIAL: |
b0a3f2bc | 1611 | |
55301ec0 | 1612 | p->fd = special_address_create(p->path, s->writable); |
e8da24a6 LP |
1613 | if (p->fd < 0) { |
1614 | r = p->fd; | |
b0a3f2bc | 1615 | goto rollback; |
e8da24a6 | 1616 | } |
00411a13 | 1617 | break; |
b0a3f2bc | 1618 | |
00411a13 | 1619 | case SOCKET_FIFO: |
83c60c9f | 1620 | |
e8da24a6 | 1621 | p->fd = fifo_address_create( |
175a3d25 LP |
1622 | p->path, |
1623 | s->directory_mode, | |
e8da24a6 LP |
1624 | s->socket_mode); |
1625 | if (p->fd < 0) { | |
1626 | r = p->fd; | |
83c60c9f | 1627 | goto rollback; |
e8da24a6 | 1628 | } |
83c60c9f | 1629 | |
b15bdda8 | 1630 | socket_apply_fifo_options(s, p->fd); |
811ba7a0 | 1631 | socket_symlink(s); |
00411a13 | 1632 | break; |
811ba7a0 | 1633 | |
00411a13 | 1634 | case SOCKET_MQUEUE: |
83c60c9f | 1635 | |
e8da24a6 | 1636 | p->fd = mq_address_create( |
175a3d25 LP |
1637 | p->path, |
1638 | s->socket_mode, | |
1639 | s->mq_maxmsg, | |
e8da24a6 LP |
1640 | s->mq_msgsize); |
1641 | if (p->fd < 0) { | |
1642 | r = p->fd; | |
916abb21 | 1643 | goto rollback; |
e8da24a6 | 1644 | } |
00411a13 | 1645 | break; |
e8da24a6 | 1646 | |
d2a50e3b | 1647 | case SOCKET_USB_FUNCTION: { |
27a6ea91 | 1648 | _cleanup_free_ char *ep = NULL; |
60252446 | 1649 | |
27a6ea91 GB |
1650 | ep = path_make_absolute("ep0", p->path); |
1651 | ||
1652 | p->fd = usbffs_address_create(ep); | |
e8da24a6 LP |
1653 | if (p->fd < 0) { |
1654 | r = p->fd; | |
60252446 | 1655 | goto rollback; |
e8da24a6 | 1656 | } |
60252446 | 1657 | |
36078102 | 1658 | r = usbffs_write_descs(p->fd, SERVICE(UNIT_DEREF(s->service))); |
6b7e5923 PS |
1659 | if (r < 0) |
1660 | goto rollback; | |
1661 | ||
36078102 | 1662 | r = usbffs_dispatch_eps(p); |
60252446 PS |
1663 | if (r < 0) |
1664 | goto rollback; | |
00411a13 LP |
1665 | |
1666 | break; | |
27a6ea91 | 1667 | } |
00411a13 | 1668 | default: |
b15bdda8 | 1669 | assert_not_reached("Unknown port type"); |
00411a13 | 1670 | } |
034c6ed7 LP |
1671 | } |
1672 | ||
1673 | return 0; | |
1674 | ||
1675 | rollback: | |
1676 | socket_close_fds(s); | |
1677 | return r; | |
1678 | } | |
1679 | ||
1680 | static void socket_unwatch_fds(Socket *s) { | |
1681 | SocketPort *p; | |
718db961 | 1682 | int r; |
9152c765 | 1683 | |
034c6ed7 LP |
1684 | assert(s); |
1685 | ||
1686 | LIST_FOREACH(port, p, s->ports) { | |
1687 | if (p->fd < 0) | |
1688 | continue; | |
1689 | ||
a4152e3f LP |
1690 | if (!p->event_source) |
1691 | continue; | |
1692 | ||
1693 | r = sd_event_source_set_enabled(p->event_source, SD_EVENT_OFF); | |
1694 | if (r < 0) | |
f2341e0a | 1695 | log_unit_debug_errno(UNIT(s), r, "Failed to disable event source: %m"); |
83c60c9f | 1696 | } |
034c6ed7 LP |
1697 | } |
1698 | ||
1699 | static int socket_watch_fds(Socket *s) { | |
1700 | SocketPort *p; | |
1701 | int r; | |
1702 | ||
1703 | assert(s); | |
83c60c9f | 1704 | |
034c6ed7 LP |
1705 | LIST_FOREACH(port, p, s->ports) { |
1706 | if (p->fd < 0) | |
1707 | continue; | |
1708 | ||
cbf60d0a | 1709 | if (p->event_source) { |
718db961 | 1710 | r = sd_event_source_set_enabled(p->event_source, SD_EVENT_ON); |
cbf60d0a LP |
1711 | if (r < 0) |
1712 | goto fail; | |
1713 | } else { | |
151b9b96 | 1714 | r = sd_event_add_io(UNIT(s)->manager->event, &p->event_source, p->fd, EPOLLIN, socket_dispatch_io, p); |
cbf60d0a LP |
1715 | if (r < 0) |
1716 | goto fail; | |
4f2d528d | 1717 | |
cbf60d0a | 1718 | (void) sd_event_source_set_description(p->event_source, "socket-port-io"); |
718db961 | 1719 | } |
034c6ed7 | 1720 | } |
83c60c9f | 1721 | |
542563ba | 1722 | return 0; |
83c60c9f | 1723 | |
034c6ed7 | 1724 | fail: |
cbf60d0a | 1725 | log_unit_warning_errno(UNIT(s), r, "Failed to watch listening fds: %m"); |
034c6ed7 LP |
1726 | socket_unwatch_fds(s); |
1727 | return r; | |
1728 | } | |
1729 | ||
01a8b467 LP |
1730 | enum { |
1731 | SOCKET_OPEN_NONE, | |
1732 | SOCKET_OPEN_SOME, | |
1733 | SOCKET_OPEN_ALL, | |
1734 | }; | |
1735 | ||
1736 | static int socket_check_open(Socket *s) { | |
1737 | bool have_open = false, have_closed = false; | |
1738 | SocketPort *p; | |
1739 | ||
1740 | assert(s); | |
1741 | ||
1742 | LIST_FOREACH(port, p, s->ports) { | |
1743 | if (p->fd < 0) | |
1744 | have_closed = true; | |
1745 | else | |
1746 | have_open = true; | |
1747 | ||
1748 | if (have_open && have_closed) | |
1749 | return SOCKET_OPEN_SOME; | |
1750 | } | |
1751 | ||
1752 | if (have_open) | |
1753 | return SOCKET_OPEN_ALL; | |
1754 | ||
1755 | return SOCKET_OPEN_NONE; | |
1756 | } | |
1757 | ||
034c6ed7 LP |
1758 | static void socket_set_state(Socket *s, SocketState state) { |
1759 | SocketState old_state; | |
1760 | assert(s); | |
1761 | ||
1762 | old_state = s->state; | |
1763 | s->state = state; | |
1764 | ||
bd1fe7c7 LP |
1765 | if (!IN_SET(state, |
1766 | SOCKET_START_PRE, | |
3900e5fd | 1767 | SOCKET_START_CHOWN, |
bd1fe7c7 LP |
1768 | SOCKET_START_POST, |
1769 | SOCKET_STOP_PRE, | |
1770 | SOCKET_STOP_PRE_SIGTERM, | |
1771 | SOCKET_STOP_PRE_SIGKILL, | |
1772 | SOCKET_STOP_POST, | |
1773 | SOCKET_FINAL_SIGTERM, | |
1774 | SOCKET_FINAL_SIGKILL)) { | |
718db961 LP |
1775 | |
1776 | s->timer_event_source = sd_event_source_unref(s->timer_event_source); | |
5e94833f | 1777 | socket_unwatch_control_pid(s); |
034c6ed7 | 1778 | s->control_command = NULL; |
a16e1123 | 1779 | s->control_command_id = _SOCKET_EXEC_COMMAND_INVALID; |
e537352b | 1780 | } |
034c6ed7 | 1781 | |
a16e1123 LP |
1782 | if (state != SOCKET_LISTENING) |
1783 | socket_unwatch_fds(s); | |
1784 | ||
bd1fe7c7 | 1785 | if (!IN_SET(state, |
3900e5fd | 1786 | SOCKET_START_CHOWN, |
bd1fe7c7 LP |
1787 | SOCKET_START_POST, |
1788 | SOCKET_LISTENING, | |
1789 | SOCKET_RUNNING, | |
1790 | SOCKET_STOP_PRE, | |
1791 | SOCKET_STOP_PRE_SIGTERM, | |
1792 | SOCKET_STOP_PRE_SIGKILL)) | |
034c6ed7 LP |
1793 | socket_close_fds(s); |
1794 | ||
e537352b | 1795 | if (state != old_state) |
f2341e0a | 1796 | log_unit_debug(UNIT(s), "Changed %s -> %s", socket_state_to_string(old_state), socket_state_to_string(state)); |
acbb0225 | 1797 | |
2ad2e41a | 1798 | unit_notify(UNIT(s), state_translation_table[old_state], state_translation_table[state], 0); |
034c6ed7 LP |
1799 | } |
1800 | ||
be847e82 | 1801 | static int socket_coldplug(Unit *u) { |
a16e1123 LP |
1802 | Socket *s = SOCKET(u); |
1803 | int r; | |
1804 | ||
1805 | assert(s); | |
1806 | assert(s->state == SOCKET_DEAD); | |
1807 | ||
e821075a LP |
1808 | if (s->deserialized_state == s->state) |
1809 | return 0; | |
a16e1123 | 1810 | |
c386f588 LP |
1811 | if (s->control_pid > 0 && |
1812 | pid_is_unwaited(s->control_pid) && | |
1813 | IN_SET(s->deserialized_state, | |
3900e5fd LP |
1814 | SOCKET_START_PRE, |
1815 | SOCKET_START_CHOWN, | |
1816 | SOCKET_START_POST, | |
1817 | SOCKET_STOP_PRE, | |
1818 | SOCKET_STOP_PRE_SIGTERM, | |
1819 | SOCKET_STOP_PRE_SIGKILL, | |
1820 | SOCKET_STOP_POST, | |
1821 | SOCKET_FINAL_SIGTERM, | |
1822 | SOCKET_FINAL_SIGKILL)) { | |
a16e1123 | 1823 | |
e821075a LP |
1824 | r = unit_watch_pid(UNIT(s), s->control_pid); |
1825 | if (r < 0) | |
1826 | return r; | |
a16e1123 | 1827 | |
36c16a7c | 1828 | r = socket_arm_timer(s, usec_add(u->state_change_timestamp.monotonic, s->timeout_usec)); |
e821075a LP |
1829 | if (r < 0) |
1830 | return r; | |
1831 | } | |
a16e1123 | 1832 | |
3900e5fd LP |
1833 | if (IN_SET(s->deserialized_state, |
1834 | SOCKET_START_CHOWN, | |
1835 | SOCKET_START_POST, | |
1836 | SOCKET_LISTENING, | |
01a8b467 LP |
1837 | SOCKET_RUNNING)) { |
1838 | ||
1839 | /* Originally, we used to simply reopen all sockets here that we didn't have file descriptors | |
1840 | * for. However, this is problematic, as we won't traverse throught the SOCKET_START_CHOWN state for | |
1841 | * them, and thus the UID/GID wouldn't be right. Hence, instead simply check if we have all fds open, | |
1842 | * and if there's a mismatch, warn loudly. */ | |
1843 | ||
1844 | r = socket_check_open(s); | |
1845 | if (r == SOCKET_OPEN_NONE) | |
1846 | log_unit_warning(UNIT(s), | |
1847 | "Socket unit configuration has changed while unit has been running, " | |
1848 | "no open socket file descriptor left. " | |
1849 | "The socket unit is not functional until restarted."); | |
1850 | else if (r == SOCKET_OPEN_SOME) | |
1851 | log_unit_warning(UNIT(s), | |
1852 | "Socket unit configuration has changed while unit has been running, " | |
1853 | "and some socket file descriptors have not been opened yet. " | |
1854 | "The socket unit is not fully functional until restarted."); | |
e821075a | 1855 | } |
a16e1123 | 1856 | |
e821075a LP |
1857 | if (s->deserialized_state == SOCKET_LISTENING) { |
1858 | r = socket_watch_fds(s); | |
1859 | if (r < 0) | |
1860 | return r; | |
a16e1123 LP |
1861 | } |
1862 | ||
e8a565cb | 1863 | if (!IN_SET(s->deserialized_state, SOCKET_DEAD, SOCKET_FAILED)) { |
29206d46 | 1864 | (void) unit_setup_dynamic_creds(u); |
e8a565cb YW |
1865 | (void) unit_setup_exec_runtime(u); |
1866 | } | |
29206d46 | 1867 | |
e821075a | 1868 | socket_set_state(s, s->deserialized_state); |
a16e1123 LP |
1869 | return 0; |
1870 | } | |
1871 | ||
e537352b | 1872 | static int socket_spawn(Socket *s, ExecCommand *c, pid_t *_pid) { |
3c7416b6 | 1873 | |
9fa95f85 | 1874 | ExecParameters exec_params = { |
1703fa41 | 1875 | .flags = EXEC_APPLY_SANDBOXING|EXEC_APPLY_CHROOT|EXEC_APPLY_TTY_STDIN, |
c39f1ce2 LP |
1876 | .stdin_fd = -1, |
1877 | .stdout_fd = -1, | |
1878 | .stderr_fd = -1, | |
9fa95f85 | 1879 | }; |
3c7416b6 LP |
1880 | pid_t pid; |
1881 | int r; | |
034c6ed7 LP |
1882 | |
1883 | assert(s); | |
1884 | assert(c); | |
1885 | assert(_pid); | |
1886 | ||
3c7416b6 | 1887 | r = unit_prepare_exec(UNIT(s)); |
29206d46 LP |
1888 | if (r < 0) |
1889 | return r; | |
1890 | ||
36c16a7c | 1891 | r = socket_arm_timer(s, usec_add(now(CLOCK_MONOTONIC), s->timeout_usec)); |
36697dc0 | 1892 | if (r < 0) |
36c16a7c | 1893 | return r; |
034c6ed7 | 1894 | |
f0d47797 | 1895 | unit_set_exec_params(UNIT(s), &exec_params); |
3536f49e | 1896 | |
5125e762 | 1897 | exec_params.argv = c->argv; |
9fa95f85 | 1898 | |
f2341e0a LP |
1899 | r = exec_spawn(UNIT(s), |
1900 | c, | |
9e2f7c11 | 1901 | &s->exec_context, |
9fa95f85 | 1902 | &exec_params, |
613b411c | 1903 | s->exec_runtime, |
29206d46 | 1904 | &s->dynamic_creds, |
9e2f7c11 | 1905 | &pid); |
cee288ad | 1906 | if (r < 0) |
36c16a7c | 1907 | return r; |
9e2f7c11 | 1908 | |
3900e5fd | 1909 | r = unit_watch_pid(UNIT(s), pid); |
9e2f7c11 | 1910 | if (r < 0) |
3900e5fd | 1911 | /* FIXME: we need to do something here */ |
36c16a7c | 1912 | return r; |
034c6ed7 | 1913 | |
3900e5fd | 1914 | *_pid = pid; |
3536f49e | 1915 | |
3900e5fd | 1916 | return 0; |
3900e5fd LP |
1917 | } |
1918 | ||
1919 | static int socket_chown(Socket *s, pid_t *_pid) { | |
1920 | pid_t pid; | |
1921 | int r; | |
1922 | ||
36c16a7c | 1923 | r = socket_arm_timer(s, usec_add(now(CLOCK_MONOTONIC), s->timeout_usec)); |
3900e5fd LP |
1924 | if (r < 0) |
1925 | goto fail; | |
1926 | ||
1927 | /* We have to resolve the user names out-of-process, hence | |
1928 | * let's fork here. It's messy, but well, what can we do? */ | |
1929 | ||
4c253ed1 | 1930 | r = unit_fork_helper_process(UNIT(s), "(sd-chown)", &pid); |
a79279c7 LP |
1931 | if (r < 0) |
1932 | return r; | |
1933 | if (r == 0) { | |
fed1e721 LP |
1934 | uid_t uid = UID_INVALID; |
1935 | gid_t gid = GID_INVALID; | |
a79279c7 | 1936 | SocketPort *p; |
3900e5fd | 1937 | |
a79279c7 | 1938 | /* Child */ |
3900e5fd LP |
1939 | |
1940 | if (!isempty(s->user)) { | |
1941 | const char *user = s->user; | |
1942 | ||
1943 | r = get_user_creds(&user, &uid, &gid, NULL, NULL); | |
1944 | if (r < 0) { | |
a79279c7 LP |
1945 | log_unit_error_errno(UNIT(s), r, "Failed to resolve user %s: %m", user); |
1946 | _exit(EXIT_USER); | |
3900e5fd LP |
1947 | } |
1948 | } | |
1949 | ||
1950 | if (!isempty(s->group)) { | |
1951 | const char *group = s->group; | |
1952 | ||
1953 | r = get_group_creds(&group, &gid); | |
1954 | if (r < 0) { | |
a79279c7 LP |
1955 | log_unit_error_errno(UNIT(s), r, "Failed to resolve group %s: %m", group); |
1956 | _exit(EXIT_GROUP); | |
3900e5fd LP |
1957 | } |
1958 | } | |
1959 | ||
1960 | LIST_FOREACH(port, p, s->ports) { | |
e5a1c18d | 1961 | const char *path = NULL; |
3900e5fd LP |
1962 | |
1963 | if (p->type == SOCKET_SOCKET) | |
1964 | path = socket_address_get_path(&p->address); | |
1965 | else if (p->type == SOCKET_FIFO) | |
1966 | path = p->path; | |
1967 | ||
1968 | if (!path) | |
1969 | continue; | |
1970 | ||
1971 | if (chown(path, uid, gid) < 0) { | |
a79279c7 LP |
1972 | log_unit_error_errno(UNIT(s), errno, "Failed to chown(): %m"); |
1973 | _exit(EXIT_CHOWN); | |
3900e5fd LP |
1974 | } |
1975 | } | |
1976 | ||
a79279c7 | 1977 | _exit(EXIT_SUCCESS); |
3900e5fd LP |
1978 | } |
1979 | ||
718db961 LP |
1980 | r = unit_watch_pid(UNIT(s), pid); |
1981 | if (r < 0) | |
034c6ed7 | 1982 | goto fail; |
83c60c9f | 1983 | |
034c6ed7 | 1984 | *_pid = pid; |
034c6ed7 LP |
1985 | return 0; |
1986 | ||
1987 | fail: | |
718db961 | 1988 | s->timer_event_source = sd_event_source_unref(s->timer_event_source); |
83c60c9f | 1989 | return r; |
542563ba LP |
1990 | } |
1991 | ||
cfc4eb4c | 1992 | static void socket_enter_dead(Socket *s, SocketResult f) { |
034c6ed7 LP |
1993 | assert(s); |
1994 | ||
a0fef983 | 1995 | if (s->result == SOCKET_SUCCESS) |
cfc4eb4c | 1996 | s->result = f; |
034c6ed7 | 1997 | |
ed77d407 LP |
1998 | if (s->result != SOCKET_SUCCESS) |
1999 | log_unit_warning(UNIT(s), "Failed with result '%s'.", socket_result_to_string(s->result)); | |
2000 | ||
29206d46 LP |
2001 | socket_set_state(s, s->result != SOCKET_SUCCESS ? SOCKET_FAILED : SOCKET_DEAD); |
2002 | ||
e8a565cb | 2003 | s->exec_runtime = exec_runtime_unref(s->exec_runtime, true); |
613b411c | 2004 | |
3536f49e | 2005 | exec_context_destroy_runtime_directory(&s->exec_context, UNIT(s)->manager->prefix[EXEC_DIRECTORY_RUNTIME]); |
e66cf1a3 | 2006 | |
00d9ef85 LP |
2007 | unit_unref_uid_gid(UNIT(s), true); |
2008 | ||
29206d46 | 2009 | dynamic_creds_destroy(&s->dynamic_creds); |
034c6ed7 LP |
2010 | } |
2011 | ||
cfc4eb4c | 2012 | static void socket_enter_signal(Socket *s, SocketState state, SocketResult f); |
80876c20 | 2013 | |
cfc4eb4c | 2014 | static void socket_enter_stop_post(Socket *s, SocketResult f) { |
034c6ed7 LP |
2015 | int r; |
2016 | assert(s); | |
2017 | ||
a0fef983 | 2018 | if (s->result == SOCKET_SUCCESS) |
cfc4eb4c | 2019 | s->result = f; |
034c6ed7 | 2020 | |
5e94833f | 2021 | socket_unwatch_control_pid(s); |
a16e1123 | 2022 | s->control_command_id = SOCKET_EXEC_STOP_POST; |
3900e5fd | 2023 | s->control_command = s->exec_command[SOCKET_EXEC_STOP_POST]; |
a16e1123 | 2024 | |
3900e5fd LP |
2025 | if (s->control_command) { |
2026 | r = socket_spawn(s, s->control_command, &s->control_pid); | |
2027 | if (r < 0) | |
034c6ed7 LP |
2028 | goto fail; |
2029 | ||
80876c20 LP |
2030 | socket_set_state(s, SOCKET_STOP_POST); |
2031 | } else | |
cfc4eb4c | 2032 | socket_enter_signal(s, SOCKET_FINAL_SIGTERM, SOCKET_SUCCESS); |
034c6ed7 LP |
2033 | |
2034 | return; | |
2035 | ||
2036 | fail: | |
f2341e0a | 2037 | log_unit_warning_errno(UNIT(s), r, "Failed to run 'stop-post' task: %m"); |
cfc4eb4c | 2038 | socket_enter_signal(s, SOCKET_FINAL_SIGTERM, SOCKET_FAILURE_RESOURCES); |
034c6ed7 LP |
2039 | } |
2040 | ||
cfc4eb4c | 2041 | static void socket_enter_signal(Socket *s, SocketState state, SocketResult f) { |
034c6ed7 LP |
2042 | int r; |
2043 | ||
2044 | assert(s); | |
2045 | ||
a0fef983 | 2046 | if (s->result == SOCKET_SUCCESS) |
cfc4eb4c | 2047 | s->result = f; |
034c6ed7 | 2048 | |
cd2086fe LP |
2049 | r = unit_kill_context( |
2050 | UNIT(s), | |
2051 | &s->kill_context, | |
ec2ce0c5 | 2052 | !IN_SET(state, SOCKET_STOP_PRE_SIGTERM, SOCKET_FINAL_SIGTERM) ? |
db2cb23b | 2053 | KILL_KILL : KILL_TERMINATE, |
cd2086fe LP |
2054 | -1, |
2055 | s->control_pid, | |
2056 | false); | |
2057 | if (r < 0) | |
2058 | goto fail; | |
034c6ed7 | 2059 | |
cd2086fe | 2060 | if (r > 0) { |
36c16a7c | 2061 | r = socket_arm_timer(s, usec_add(now(CLOCK_MONOTONIC), s->timeout_usec)); |
36697dc0 | 2062 | if (r < 0) |
80876c20 | 2063 | goto fail; |
d6ea93e3 | 2064 | |
80876c20 | 2065 | socket_set_state(s, state); |
ac84d1fb LP |
2066 | } else if (state == SOCKET_STOP_PRE_SIGTERM) |
2067 | socket_enter_signal(s, SOCKET_STOP_PRE_SIGKILL, SOCKET_SUCCESS); | |
2068 | else if (state == SOCKET_STOP_PRE_SIGKILL) | |
cfc4eb4c | 2069 | socket_enter_stop_post(s, SOCKET_SUCCESS); |
ac84d1fb LP |
2070 | else if (state == SOCKET_FINAL_SIGTERM) |
2071 | socket_enter_signal(s, SOCKET_FINAL_SIGKILL, SOCKET_SUCCESS); | |
80876c20 | 2072 | else |
cfc4eb4c | 2073 | socket_enter_dead(s, SOCKET_SUCCESS); |
034c6ed7 LP |
2074 | |
2075 | return; | |
2076 | ||
2077 | fail: | |
f2341e0a | 2078 | log_unit_warning_errno(UNIT(s), r, "Failed to kill processes: %m"); |
034c6ed7 | 2079 | |
3742095b | 2080 | if (IN_SET(state, SOCKET_STOP_PRE_SIGTERM, SOCKET_STOP_PRE_SIGKILL)) |
cfc4eb4c | 2081 | socket_enter_stop_post(s, SOCKET_FAILURE_RESOURCES); |
034c6ed7 | 2082 | else |
cfc4eb4c | 2083 | socket_enter_dead(s, SOCKET_FAILURE_RESOURCES); |
034c6ed7 LP |
2084 | } |
2085 | ||
cfc4eb4c | 2086 | static void socket_enter_stop_pre(Socket *s, SocketResult f) { |
034c6ed7 LP |
2087 | int r; |
2088 | assert(s); | |
2089 | ||
a0fef983 | 2090 | if (s->result == SOCKET_SUCCESS) |
cfc4eb4c | 2091 | s->result = f; |
034c6ed7 | 2092 | |
5e94833f | 2093 | socket_unwatch_control_pid(s); |
a16e1123 | 2094 | s->control_command_id = SOCKET_EXEC_STOP_PRE; |
3900e5fd | 2095 | s->control_command = s->exec_command[SOCKET_EXEC_STOP_PRE]; |
a16e1123 | 2096 | |
3900e5fd LP |
2097 | if (s->control_command) { |
2098 | r = socket_spawn(s, s->control_command, &s->control_pid); | |
2099 | if (r < 0) | |
034c6ed7 LP |
2100 | goto fail; |
2101 | ||
80876c20 LP |
2102 | socket_set_state(s, SOCKET_STOP_PRE); |
2103 | } else | |
cfc4eb4c | 2104 | socket_enter_stop_post(s, SOCKET_SUCCESS); |
034c6ed7 LP |
2105 | |
2106 | return; | |
2107 | ||
2108 | fail: | |
f2341e0a | 2109 | log_unit_warning_errno(UNIT(s), r, "Failed to run 'stop-pre' task: %m"); |
cfc4eb4c | 2110 | socket_enter_stop_post(s, SOCKET_FAILURE_RESOURCES); |
034c6ed7 LP |
2111 | } |
2112 | ||
e9af15c3 LP |
2113 | static void socket_enter_listening(Socket *s) { |
2114 | int r; | |
2115 | assert(s); | |
2116 | ||
cfc4eb4c LP |
2117 | r = socket_watch_fds(s); |
2118 | if (r < 0) { | |
f2341e0a | 2119 | log_unit_warning_errno(UNIT(s), r, "Failed to watch sockets: %m"); |
e9af15c3 LP |
2120 | goto fail; |
2121 | } | |
2122 | ||
2123 | socket_set_state(s, SOCKET_LISTENING); | |
2124 | return; | |
2125 | ||
2126 | fail: | |
cfc4eb4c | 2127 | socket_enter_stop_pre(s, SOCKET_FAILURE_RESOURCES); |
e9af15c3 LP |
2128 | } |
2129 | ||
034c6ed7 LP |
2130 | static void socket_enter_start_post(Socket *s) { |
2131 | int r; | |
2132 | assert(s); | |
2133 | ||
3900e5fd LP |
2134 | socket_unwatch_control_pid(s); |
2135 | s->control_command_id = SOCKET_EXEC_START_POST; | |
2136 | s->control_command = s->exec_command[SOCKET_EXEC_START_POST]; | |
2137 | ||
2138 | if (s->control_command) { | |
2139 | r = socket_spawn(s, s->control_command, &s->control_pid); | |
2140 | if (r < 0) { | |
f2341e0a | 2141 | log_unit_warning_errno(UNIT(s), r, "Failed to run 'start-post' task: %m"); |
3900e5fd LP |
2142 | goto fail; |
2143 | } | |
2144 | ||
2145 | socket_set_state(s, SOCKET_START_POST); | |
2146 | } else | |
2147 | socket_enter_listening(s); | |
2148 | ||
2149 | return; | |
2150 | ||
2151 | fail: | |
2152 | socket_enter_stop_pre(s, SOCKET_FAILURE_RESOURCES); | |
2153 | } | |
2154 | ||
2155 | static void socket_enter_start_chown(Socket *s) { | |
2156 | int r; | |
2157 | ||
2158 | assert(s); | |
2159 | ||
cfc4eb4c LP |
2160 | r = socket_open_fds(s); |
2161 | if (r < 0) { | |
f2341e0a | 2162 | log_unit_warning_errno(UNIT(s), r, "Failed to listen on sockets: %m"); |
034c6ed7 LP |
2163 | goto fail; |
2164 | } | |
2165 | ||
3900e5fd | 2166 | if (!isempty(s->user) || !isempty(s->group)) { |
5e94833f | 2167 | |
3900e5fd LP |
2168 | socket_unwatch_control_pid(s); |
2169 | s->control_command_id = SOCKET_EXEC_START_CHOWN; | |
2170 | s->control_command = NULL; | |
a16e1123 | 2171 | |
3900e5fd | 2172 | r = socket_chown(s, &s->control_pid); |
cfc4eb4c | 2173 | if (r < 0) { |
f2341e0a | 2174 | log_unit_warning_errno(UNIT(s), r, "Failed to fork 'start-chown' task: %m"); |
034c6ed7 LP |
2175 | goto fail; |
2176 | } | |
2177 | ||
3900e5fd | 2178 | socket_set_state(s, SOCKET_START_CHOWN); |
80876c20 | 2179 | } else |
3900e5fd | 2180 | socket_enter_start_post(s); |
034c6ed7 LP |
2181 | |
2182 | return; | |
2183 | ||
2184 | fail: | |
cfc4eb4c | 2185 | socket_enter_stop_pre(s, SOCKET_FAILURE_RESOURCES); |
034c6ed7 LP |
2186 | } |
2187 | ||
2188 | static void socket_enter_start_pre(Socket *s) { | |
2189 | int r; | |
2190 | assert(s); | |
2191 | ||
5e94833f | 2192 | socket_unwatch_control_pid(s); |
a4634b21 LP |
2193 | |
2194 | unit_warn_leftover_processes(UNIT(s)); | |
2195 | ||
a16e1123 | 2196 | s->control_command_id = SOCKET_EXEC_START_PRE; |
3900e5fd | 2197 | s->control_command = s->exec_command[SOCKET_EXEC_START_PRE]; |
a16e1123 | 2198 | |
3900e5fd | 2199 | if (s->control_command) { |
e821075a | 2200 | r = socket_spawn(s, s->control_command, &s->control_pid); |
3900e5fd | 2201 | if (r < 0) { |
f2341e0a | 2202 | log_unit_warning_errno(UNIT(s), r, "Failed to run 'start-pre' task: %m"); |
034c6ed7 | 2203 | goto fail; |
3900e5fd | 2204 | } |
034c6ed7 | 2205 | |
80876c20 LP |
2206 | socket_set_state(s, SOCKET_START_PRE); |
2207 | } else | |
3900e5fd | 2208 | socket_enter_start_chown(s); |
034c6ed7 LP |
2209 | |
2210 | return; | |
2211 | ||
2212 | fail: | |
cfc4eb4c | 2213 | socket_enter_dead(s, SOCKET_FAILURE_RESOURCES); |
034c6ed7 LP |
2214 | } |
2215 | ||
60d9771c LP |
2216 | static void flush_ports(Socket *s) { |
2217 | SocketPort *p; | |
2218 | ||
2219 | /* Flush all incoming traffic, regardless if actual bytes or new connections, so that this socket isn't busy | |
2220 | * anymore */ | |
2221 | ||
2222 | LIST_FOREACH(port, p, s->ports) { | |
2223 | if (p->fd < 0) | |
2224 | continue; | |
2225 | ||
2226 | (void) flush_accept(p->fd); | |
2227 | (void) flush_fd(p->fd); | |
2228 | } | |
2229 | } | |
2230 | ||
4f2d528d | 2231 | static void socket_enter_running(Socket *s, int cfd) { |
4afd3348 | 2232 | _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL; |
034c6ed7 LP |
2233 | int r; |
2234 | ||
8b26cdbd LP |
2235 | /* Note that this call takes possession of the connection fd passed. It either has to assign it somewhere or |
2236 | * close it. */ | |
2237 | ||
034c6ed7 LP |
2238 | assert(s); |
2239 | ||
60d9771c | 2240 | /* We don't take connections anymore if we are supposed to shut down anyway */ |
31afa0a4 | 2241 | if (unit_stop_pending(UNIT(s))) { |
e821075a | 2242 | |
f2341e0a | 2243 | log_unit_debug(UNIT(s), "Suppressing connection request since unit stop is scheduled."); |
5d909e3e | 2244 | |
7c610628 | 2245 | if (cfd >= 0) |
8b26cdbd | 2246 | cfd = safe_close(cfd); |
60d9771c LP |
2247 | else |
2248 | flush_ports(s); | |
7c610628 | 2249 | |
ba3e67a7 LP |
2250 | return; |
2251 | } | |
2252 | ||
7994ac1d | 2253 | if (!ratelimit_below(&s->trigger_limit)) { |
8b26cdbd LP |
2254 | safe_close(cfd); |
2255 | log_unit_warning(UNIT(s), "Trigger limit hit, refusing further activation."); | |
2256 | socket_enter_stop_pre(s, SOCKET_FAILURE_TRIGGER_LIMIT_HIT); | |
2257 | return; | |
2258 | } | |
2259 | ||
4f2d528d | 2260 | if (cfd < 0) { |
f976f3f6 | 2261 | bool pending = false; |
eef85c4a LP |
2262 | Unit *other; |
2263 | Iterator i; | |
2264 | void *v; | |
f976f3f6 LP |
2265 | |
2266 | /* If there's already a start pending don't bother to | |
2267 | * do anything */ | |
eef85c4a | 2268 | HASHMAP_FOREACH_KEY(v, other, UNIT(s)->dependencies[UNIT_TRIGGERS], i) |
e821075a | 2269 | if (unit_active_or_pending(other)) { |
57020a3a LP |
2270 | pending = true; |
2271 | break; | |
2272 | } | |
f976f3f6 | 2273 | |
1a710b43 | 2274 | if (!pending) { |
640ace4a | 2275 | if (!UNIT_ISSET(s->service)) { |
f2341e0a | 2276 | log_unit_error(UNIT(s), "Service to activate vanished, refusing activation."); |
640ace4a LP |
2277 | r = -ENOENT; |
2278 | goto fail; | |
2279 | } | |
2280 | ||
4bd29fe5 | 2281 | r = manager_add_job(UNIT(s)->manager, JOB_START, UNIT_DEREF(s->service), JOB_REPLACE, &error, NULL); |
1a710b43 | 2282 | if (r < 0) |
f976f3f6 | 2283 | goto fail; |
1a710b43 | 2284 | } |
4f2d528d LP |
2285 | |
2286 | socket_set_state(s, SOCKET_RUNNING); | |
2287 | } else { | |
e55001eb | 2288 | _cleanup_free_ char *prefix = NULL, *instance = NULL, *name = NULL; |
9d565427 | 2289 | _cleanup_(socket_peer_unrefp) SocketPeer *p = NULL; |
b15bdda8 | 2290 | Service *service; |
4f2d528d | 2291 | |
6cf6bbc2 | 2292 | if (s->n_connections >= s->max_connections) { |
ea8f50f8 | 2293 | log_unit_warning(UNIT(s), "Too many incoming connections (%u), dropping connection.", |
166cf510 | 2294 | s->n_connections); |
03e334a1 | 2295 | safe_close(cfd); |
6cf6bbc2 LP |
2296 | return; |
2297 | } | |
2298 | ||
9d565427 | 2299 | if (s->max_connections_per_source > 0) { |
166cf510 | 2300 | r = socket_acquire_peer(s, cfd, &p); |
9d565427 SS |
2301 | if (r < 0) { |
2302 | safe_close(cfd); | |
2303 | return; | |
166cf510 | 2304 | } else if (r > 0 && p->n_ref > s->max_connections_per_source) { |
ea8f50f8 ZJS |
2305 | _cleanup_free_ char *t = NULL; |
2306 | ||
41733ae1 | 2307 | (void) sockaddr_pretty(&p->peer.sa, p->peer_salen, true, false, &t); |
ea8f50f8 | 2308 | |
166cf510 | 2309 | log_unit_warning(UNIT(s), |
ea8f50f8 ZJS |
2310 | "Too many incoming connections (%u) from source %s, dropping connection.", |
2311 | p->n_ref, strnull(t)); | |
9d565427 | 2312 | safe_close(cfd); |
9d565427 SS |
2313 | return; |
2314 | } | |
2315 | } | |
2316 | ||
1a710b43 MS |
2317 | r = socket_instantiate_service(s); |
2318 | if (r < 0) | |
b15bdda8 LP |
2319 | goto fail; |
2320 | ||
1a710b43 MS |
2321 | r = instance_from_socket(cfd, s->n_accepted, &instance); |
2322 | if (r < 0) { | |
2323 | if (r != -ENOTCONN) | |
2324 | goto fail; | |
2325 | ||
2326 | /* ENOTCONN is legitimate if TCP RST was received. | |
2327 | * This connection is over, but the socket unit lives on. */ | |
8b26cdbd | 2328 | log_unit_debug(UNIT(s), "Got ENOTCONN on incoming socket, assuming aborted connection attempt, ignoring."); |
03e334a1 | 2329 | safe_close(cfd); |
1a710b43 MS |
2330 | return; |
2331 | } | |
4f2d528d | 2332 | |
7410616c LP |
2333 | r = unit_name_to_prefix(UNIT(s)->id, &prefix); |
2334 | if (r < 0) | |
4f2d528d | 2335 | goto fail; |
4f2d528d | 2336 | |
7410616c LP |
2337 | r = unit_name_build(prefix, instance, ".service", &name); |
2338 | if (r < 0) | |
b6dbbe1c | 2339 | goto fail; |
4f2d528d | 2340 | |
1a710b43 | 2341 | r = unit_add_name(UNIT_DEREF(s->service), name); |
e55001eb | 2342 | if (r < 0) |
4f2d528d | 2343 | goto fail; |
b15bdda8 | 2344 | |
57020a3a LP |
2345 | service = SERVICE(UNIT_DEREF(s->service)); |
2346 | unit_ref_unset(&s->service); | |
6c073082 | 2347 | |
e4f67317 | 2348 | s->n_accepted++; |
b15bdda8 | 2349 | unit_choose_id(UNIT(service), name); |
b15bdda8 | 2350 | |
16115b0a | 2351 | r = service_set_socket_fd(service, cfd, s, s->selinux_context_from_net); |
1a710b43 | 2352 | if (r < 0) |
4f2d528d LP |
2353 | goto fail; |
2354 | ||
8b26cdbd | 2355 | cfd = -1; /* We passed ownership of the fd to the service now. Forget it here. */ |
313cefa1 | 2356 | s->n_connections++; |
6cf6bbc2 | 2357 | |
1cc6c93a | 2358 | service->peer = TAKE_PTR(p); /* Pass ownership of the peer reference */ |
9d565427 | 2359 | |
4bd29fe5 | 2360 | r = manager_add_job(UNIT(s)->manager, JOB_START, UNIT(service), JOB_REPLACE, &error, NULL); |
3e7a1f50 LP |
2361 | if (r < 0) { |
2362 | /* We failed to activate the new service, but it still exists. Let's make sure the service | |
2363 | * closes and forgets the connection fd again, immediately. */ | |
2364 | service_close_socket_fd(service); | |
4f2d528d | 2365 | goto fail; |
3e7a1f50 | 2366 | } |
c4e2ceae LP |
2367 | |
2368 | /* Notify clients about changed counters */ | |
2369 | unit_add_to_dbus_queue(UNIT(s)); | |
4f2d528d | 2370 | } |
034c6ed7 | 2371 | |
034c6ed7 LP |
2372 | return; |
2373 | ||
2374 | fail: | |
f2341e0a LP |
2375 | log_unit_warning(UNIT(s), "Failed to queue service startup job (Maybe the service file is missing or not a %s unit?): %s", |
2376 | cfd >= 0 ? "template" : "non-template", | |
718db961 | 2377 | bus_error_message(&error, r)); |
e821075a | 2378 | |
60089004 | 2379 | socket_enter_stop_pre(s, SOCKET_FAILURE_RESOURCES); |
03e334a1 | 2380 | safe_close(cfd); |
034c6ed7 LP |
2381 | } |
2382 | ||
cfc4eb4c | 2383 | static void socket_run_next(Socket *s) { |
034c6ed7 LP |
2384 | int r; |
2385 | ||
2386 | assert(s); | |
2387 | assert(s->control_command); | |
2388 | assert(s->control_command->command_next); | |
2389 | ||
5e94833f LP |
2390 | socket_unwatch_control_pid(s); |
2391 | ||
034c6ed7 LP |
2392 | s->control_command = s->control_command->command_next; |
2393 | ||
e821075a LP |
2394 | r = socket_spawn(s, s->control_command, &s->control_pid); |
2395 | if (r < 0) | |
034c6ed7 LP |
2396 | goto fail; |
2397 | ||
2398 | return; | |
2399 | ||
2400 | fail: | |
f2341e0a | 2401 | log_unit_warning_errno(UNIT(s), r, "Failed to run next task: %m"); |
80876c20 LP |
2402 | |
2403 | if (s->state == SOCKET_START_POST) | |
cfc4eb4c | 2404 | socket_enter_stop_pre(s, SOCKET_FAILURE_RESOURCES); |
034c6ed7 | 2405 | else if (s->state == SOCKET_STOP_POST) |
cfc4eb4c | 2406 | socket_enter_dead(s, SOCKET_FAILURE_RESOURCES); |
034c6ed7 | 2407 | else |
cfc4eb4c | 2408 | socket_enter_signal(s, SOCKET_FINAL_SIGTERM, SOCKET_FAILURE_RESOURCES); |
034c6ed7 LP |
2409 | } |
2410 | ||
87f0e418 LP |
2411 | static int socket_start(Unit *u) { |
2412 | Socket *s = SOCKET(u); | |
07299350 | 2413 | int r; |
83c60c9f LP |
2414 | |
2415 | assert(s); | |
2416 | ||
034c6ed7 LP |
2417 | /* We cannot fulfill this request right now, try again later |
2418 | * please! */ | |
3900e5fd LP |
2419 | if (IN_SET(s->state, |
2420 | SOCKET_STOP_PRE, | |
2421 | SOCKET_STOP_PRE_SIGKILL, | |
2422 | SOCKET_STOP_PRE_SIGTERM, | |
2423 | SOCKET_STOP_POST, | |
2424 | SOCKET_FINAL_SIGTERM, | |
2425 | SOCKET_FINAL_SIGKILL)) | |
034c6ed7 LP |
2426 | return -EAGAIN; |
2427 | ||
a4152e3f | 2428 | /* Already on it! */ |
3900e5fd LP |
2429 | if (IN_SET(s->state, |
2430 | SOCKET_START_PRE, | |
2431 | SOCKET_START_CHOWN, | |
2432 | SOCKET_START_POST)) | |
034c6ed7 | 2433 | return 0; |
83c60c9f | 2434 | |
034c6ed7 | 2435 | /* Cannot run this without the service being around */ |
9444b1f2 | 2436 | if (UNIT_ISSET(s->service)) { |
57020a3a LP |
2437 | Service *service; |
2438 | ||
2439 | service = SERVICE(UNIT_DEREF(s->service)); | |
2440 | ||
1124fe6f | 2441 | if (UNIT(service)->load_state != UNIT_LOADED) { |
f2341e0a | 2442 | log_unit_error(u, "Socket service %s not loaded, refusing.", UNIT(service)->id); |
4f2d528d | 2443 | return -ENOENT; |
4ac9236f | 2444 | } |
4f2d528d | 2445 | |
35b8ca3a | 2446 | /* If the service is already active we cannot start the |
4f2d528d | 2447 | * socket */ |
ec2ce0c5 | 2448 | if (!IN_SET(service->state, SERVICE_DEAD, SERVICE_FAILED, SERVICE_AUTO_RESTART)) { |
f2341e0a | 2449 | log_unit_error(u, "Socket service %s already active, refusing.", UNIT(service)->id); |
4f2d528d | 2450 | return -EBUSY; |
4ac9236f | 2451 | } |
4f2d528d | 2452 | } |
e537352b | 2453 | |
3742095b | 2454 | assert(IN_SET(s->state, SOCKET_DEAD, SOCKET_FAILED)); |
83c60c9f | 2455 | |
07299350 LP |
2456 | r = unit_start_limit_test(u); |
2457 | if (r < 0) { | |
2458 | socket_enter_dead(s, SOCKET_FAILURE_START_LIMIT_HIT); | |
2459 | return r; | |
2460 | } | |
2461 | ||
4b58153d LP |
2462 | r = unit_acquire_invocation_id(u); |
2463 | if (r < 0) | |
2464 | return r; | |
2465 | ||
cfc4eb4c | 2466 | s->result = SOCKET_SUCCESS; |
3c7416b6 LP |
2467 | |
2468 | u->reset_accounting = true; | |
5ad096b3 | 2469 | |
034c6ed7 | 2470 | socket_enter_start_pre(s); |
82a2b6bb | 2471 | return 1; |
034c6ed7 | 2472 | } |
83c60c9f | 2473 | |
87f0e418 LP |
2474 | static int socket_stop(Unit *u) { |
2475 | Socket *s = SOCKET(u); | |
034c6ed7 LP |
2476 | |
2477 | assert(s); | |
2478 | ||
e537352b | 2479 | /* Already on it */ |
3900e5fd LP |
2480 | if (IN_SET(s->state, |
2481 | SOCKET_STOP_PRE, | |
2482 | SOCKET_STOP_PRE_SIGTERM, | |
2483 | SOCKET_STOP_PRE_SIGKILL, | |
2484 | SOCKET_STOP_POST, | |
2485 | SOCKET_FINAL_SIGTERM, | |
2486 | SOCKET_FINAL_SIGKILL)) | |
e537352b LP |
2487 | return 0; |
2488 | ||
3f6c78dc LP |
2489 | /* If there's already something running we go directly into |
2490 | * kill mode. */ | |
3900e5fd LP |
2491 | if (IN_SET(s->state, |
2492 | SOCKET_START_PRE, | |
2493 | SOCKET_START_CHOWN, | |
2494 | SOCKET_START_POST)) { | |
cfc4eb4c | 2495 | socket_enter_signal(s, SOCKET_STOP_PRE_SIGTERM, SOCKET_SUCCESS); |
3f6c78dc LP |
2496 | return -EAGAIN; |
2497 | } | |
2498 | ||
3742095b | 2499 | assert(IN_SET(s->state, SOCKET_LISTENING, SOCKET_RUNNING)); |
83c60c9f | 2500 | |
cfc4eb4c | 2501 | socket_enter_stop_pre(s, SOCKET_SUCCESS); |
82a2b6bb | 2502 | return 1; |
542563ba LP |
2503 | } |
2504 | ||
a16e1123 LP |
2505 | static int socket_serialize(Unit *u, FILE *f, FDSet *fds) { |
2506 | Socket *s = SOCKET(u); | |
2507 | SocketPort *p; | |
2508 | int r; | |
2509 | ||
2510 | assert(u); | |
2511 | assert(f); | |
2512 | assert(fds); | |
2513 | ||
2514 | unit_serialize_item(u, f, "state", socket_state_to_string(s->state)); | |
cfc4eb4c | 2515 | unit_serialize_item(u, f, "result", socket_result_to_string(s->result)); |
a16e1123 LP |
2516 | unit_serialize_item_format(u, f, "n-accepted", "%u", s->n_accepted); |
2517 | ||
2518 | if (s->control_pid > 0) | |
de0671ee | 2519 | unit_serialize_item_format(u, f, "control-pid", PID_FMT, s->control_pid); |
a16e1123 LP |
2520 | |
2521 | if (s->control_command_id >= 0) | |
2522 | unit_serialize_item(u, f, "control-command", socket_exec_command_to_string(s->control_command_id)); | |
2523 | ||
2524 | LIST_FOREACH(port, p, s->ports) { | |
2525 | int copy; | |
2526 | ||
2527 | if (p->fd < 0) | |
2528 | continue; | |
2529 | ||
613b411c LP |
2530 | copy = fdset_put_dup(fds, p->fd); |
2531 | if (copy < 0) | |
a16e1123 LP |
2532 | return copy; |
2533 | ||
2534 | if (p->type == SOCKET_SOCKET) { | |
613b411c | 2535 | _cleanup_free_ char *t = NULL; |
a16e1123 | 2536 | |
ee092817 LP |
2537 | r = socket_address_print(&p->address, &t); |
2538 | if (r < 0) | |
a16e1123 LP |
2539 | return r; |
2540 | ||
7a22745a LP |
2541 | if (socket_address_family(&p->address) == AF_NETLINK) |
2542 | unit_serialize_item_format(u, f, "netlink", "%i %s", copy, t); | |
2543 | else | |
2544 | unit_serialize_item_format(u, f, "socket", "%i %i %s", copy, p->address.type, t); | |
613b411c | 2545 | |
b0a3f2bc LP |
2546 | } else if (p->type == SOCKET_SPECIAL) |
2547 | unit_serialize_item_format(u, f, "special", "%i %s", copy, p->path); | |
ee092817 LP |
2548 | else if (p->type == SOCKET_MQUEUE) |
2549 | unit_serialize_item_format(u, f, "mqueue", "%i %s", copy, p->path); | |
60252446 PS |
2550 | else if (p->type == SOCKET_USB_FUNCTION) |
2551 | unit_serialize_item_format(u, f, "ffs", "%i %s", copy, p->path); | |
b0a3f2bc | 2552 | else { |
a16e1123 LP |
2553 | assert(p->type == SOCKET_FIFO); |
2554 | unit_serialize_item_format(u, f, "fifo", "%i %s", copy, p->path); | |
2555 | } | |
2556 | } | |
2557 | ||
2558 | return 0; | |
2559 | } | |
2560 | ||
80a58668 ZJS |
2561 | static void socket_port_take_fd(SocketPort *p, FDSet *fds, int fd) { |
2562 | safe_close(p->fd); | |
2563 | p->fd = fdset_remove(fds, fd); | |
2564 | } | |
2565 | ||
a16e1123 LP |
2566 | static int socket_deserialize_item(Unit *u, const char *key, const char *value, FDSet *fds) { |
2567 | Socket *s = SOCKET(u); | |
a16e1123 LP |
2568 | |
2569 | assert(u); | |
2570 | assert(key); | |
2571 | assert(value); | |
a16e1123 LP |
2572 | |
2573 | if (streq(key, "state")) { | |
2574 | SocketState state; | |
2575 | ||
ee092817 LP |
2576 | state = socket_state_from_string(value); |
2577 | if (state < 0) | |
f2341e0a | 2578 | log_unit_debug(u, "Failed to parse state value: %s", value); |
a16e1123 LP |
2579 | else |
2580 | s->deserialized_state = state; | |
cfc4eb4c LP |
2581 | } else if (streq(key, "result")) { |
2582 | SocketResult f; | |
a16e1123 | 2583 | |
cfc4eb4c LP |
2584 | f = socket_result_from_string(value); |
2585 | if (f < 0) | |
f2341e0a | 2586 | log_unit_debug(u, "Failed to parse result value: %s", value); |
cfc4eb4c LP |
2587 | else if (f != SOCKET_SUCCESS) |
2588 | s->result = f; | |
a16e1123 LP |
2589 | |
2590 | } else if (streq(key, "n-accepted")) { | |
2591 | unsigned k; | |
2592 | ||
e364ad06 | 2593 | if (safe_atou(value, &k) < 0) |
f2341e0a | 2594 | log_unit_debug(u, "Failed to parse n-accepted value: %s", value); |
a16e1123 LP |
2595 | else |
2596 | s->n_accepted += k; | |
2597 | } else if (streq(key, "control-pid")) { | |
5925dd3c | 2598 | pid_t pid; |
a16e1123 | 2599 | |
e364ad06 | 2600 | if (parse_pid(value, &pid) < 0) |
f2341e0a | 2601 | log_unit_debug(u, "Failed to parse control-pid value: %s", value); |
a16e1123 | 2602 | else |
5925dd3c | 2603 | s->control_pid = pid; |
a16e1123 LP |
2604 | } else if (streq(key, "control-command")) { |
2605 | SocketExecCommand id; | |
2606 | ||
66870f90 ZJS |
2607 | id = socket_exec_command_from_string(value); |
2608 | if (id < 0) | |
f2341e0a | 2609 | log_unit_debug(u, "Failed to parse exec-command value: %s", value); |
a16e1123 LP |
2610 | else { |
2611 | s->control_command_id = id; | |
2612 | s->control_command = s->exec_command[id]; | |
2613 | } | |
2614 | } else if (streq(key, "fifo")) { | |
2615 | int fd, skip = 0; | |
2616 | SocketPort *p; | |
2617 | ||
2618 | if (sscanf(value, "%i %n", &fd, &skip) < 1 || fd < 0 || !fdset_contains(fds, fd)) | |
f2341e0a | 2619 | log_unit_debug(u, "Failed to parse fifo value: %s", value); |
80a58668 | 2620 | else |
a16e1123 | 2621 | LIST_FOREACH(port, p, s->ports) |
b0a3f2bc | 2622 | if (p->type == SOCKET_FIFO && |
e3f791a2 | 2623 | path_equal_or_files_same(p->path, value+skip, 0)) { |
80a58668 | 2624 | socket_port_take_fd(p, fds, fd); |
b0a3f2bc | 2625 | break; |
80a58668 | 2626 | } |
b0a3f2bc LP |
2627 | |
2628 | } else if (streq(key, "special")) { | |
2629 | int fd, skip = 0; | |
2630 | SocketPort *p; | |
2631 | ||
2632 | if (sscanf(value, "%i %n", &fd, &skip) < 1 || fd < 0 || !fdset_contains(fds, fd)) | |
f2341e0a | 2633 | log_unit_debug(u, "Failed to parse special value: %s", value); |
80a58668 | 2634 | else |
b0a3f2bc LP |
2635 | LIST_FOREACH(port, p, s->ports) |
2636 | if (p->type == SOCKET_SPECIAL && | |
e3f791a2 | 2637 | path_equal_or_files_same(p->path, value+skip, 0)) { |
80a58668 | 2638 | socket_port_take_fd(p, fds, fd); |
a16e1123 | 2639 | break; |
80a58668 | 2640 | } |
a16e1123 | 2641 | |
ee092817 LP |
2642 | } else if (streq(key, "mqueue")) { |
2643 | int fd, skip = 0; | |
2644 | SocketPort *p; | |
2645 | ||
2646 | if (sscanf(value, "%i %n", &fd, &skip) < 1 || fd < 0 || !fdset_contains(fds, fd)) | |
f2341e0a | 2647 | log_unit_debug(u, "Failed to parse mqueue value: %s", value); |
80a58668 | 2648 | else |
ee092817 LP |
2649 | LIST_FOREACH(port, p, s->ports) |
2650 | if (p->type == SOCKET_MQUEUE && | |
80a58668 ZJS |
2651 | streq(p->path, value+skip)) { |
2652 | socket_port_take_fd(p, fds, fd); | |
ee092817 | 2653 | break; |
80a58668 | 2654 | } |
ee092817 | 2655 | |
a16e1123 | 2656 | } else if (streq(key, "socket")) { |
27ca8d7a | 2657 | int fd, type, skip = 0; |
a16e1123 LP |
2658 | SocketPort *p; |
2659 | ||
27ca8d7a | 2660 | if (sscanf(value, "%i %i %n", &fd, &type, &skip) < 2 || fd < 0 || type < 0 || !fdset_contains(fds, fd)) |
f2341e0a | 2661 | log_unit_debug(u, "Failed to parse socket value: %s", value); |
80a58668 | 2662 | else |
a16e1123 | 2663 | LIST_FOREACH(port, p, s->ports) |
80a58668 ZJS |
2664 | if (socket_address_is(&p->address, value+skip, type)) { |
2665 | socket_port_take_fd(p, fds, fd); | |
a16e1123 | 2666 | break; |
80a58668 | 2667 | } |
a16e1123 | 2668 | |
7a22745a LP |
2669 | } else if (streq(key, "netlink")) { |
2670 | int fd, skip = 0; | |
2671 | SocketPort *p; | |
2672 | ||
2673 | if (sscanf(value, "%i %n", &fd, &skip) < 1 || fd < 0 || !fdset_contains(fds, fd)) | |
f2341e0a | 2674 | log_unit_debug(u, "Failed to parse socket value: %s", value); |
80a58668 | 2675 | else |
7a22745a | 2676 | LIST_FOREACH(port, p, s->ports) |
80a58668 ZJS |
2677 | if (socket_address_is_netlink(&p->address, value+skip)) { |
2678 | socket_port_take_fd(p, fds, fd); | |
7a22745a | 2679 | break; |
80a58668 | 2680 | } |
60252446 PS |
2681 | |
2682 | } else if (streq(key, "ffs")) { | |
2683 | int fd, skip = 0; | |
2684 | SocketPort *p; | |
2685 | ||
2686 | if (sscanf(value, "%i %n", &fd, &skip) < 1 || fd < 0 || !fdset_contains(fds, fd)) | |
2687 | log_unit_debug(u, "Failed to parse ffs value: %s", value); | |
80a58668 | 2688 | else |
60252446 PS |
2689 | LIST_FOREACH(port, p, s->ports) |
2690 | if (p->type == SOCKET_USB_FUNCTION && | |
e3f791a2 | 2691 | path_equal_or_files_same(p->path, value+skip, 0)) { |
80a58668 | 2692 | socket_port_take_fd(p, fds, fd); |
60252446 | 2693 | break; |
80a58668 | 2694 | } |
60252446 | 2695 | |
a16e1123 | 2696 | } else |
f2341e0a | 2697 | log_unit_debug(UNIT(s), "Unknown serialization key: %s", key); |
a16e1123 LP |
2698 | |
2699 | return 0; | |
2700 | } | |
2701 | ||
9ff1a6f1 | 2702 | static void socket_distribute_fds(Unit *u, FDSet *fds) { |
01e10de3 LP |
2703 | Socket *s = SOCKET(u); |
2704 | SocketPort *p; | |
2705 | ||
2706 | assert(u); | |
2707 | ||
2708 | LIST_FOREACH(port, p, s->ports) { | |
2709 | Iterator i; | |
2710 | int fd; | |
2711 | ||
2712 | if (p->type != SOCKET_SOCKET) | |
2713 | continue; | |
2714 | ||
2715 | if (p->fd >= 0) | |
2716 | continue; | |
2717 | ||
2718 | FDSET_FOREACH(fd, fds, i) { | |
2719 | if (socket_address_matches_fd(&p->address, fd)) { | |
2720 | p->fd = fdset_remove(fds, fd); | |
2721 | s->deserialized_state = SOCKET_LISTENING; | |
2722 | break; | |
2723 | } | |
2724 | } | |
2725 | } | |
01e10de3 LP |
2726 | } |
2727 | ||
44a6b1b6 | 2728 | _pure_ static UnitActiveState socket_active_state(Unit *u) { |
87f0e418 | 2729 | assert(u); |
5cb5a6ff | 2730 | |
acbb0225 | 2731 | return state_translation_table[SOCKET(u)->state]; |
5cb5a6ff LP |
2732 | } |
2733 | ||
44a6b1b6 | 2734 | _pure_ static const char *socket_sub_state_to_string(Unit *u) { |
10a94420 LP |
2735 | assert(u); |
2736 | ||
a16e1123 | 2737 | return socket_state_to_string(SOCKET(u)->state); |
10a94420 LP |
2738 | } |
2739 | ||
67419600 OS |
2740 | const char* socket_port_type_to_string(SocketPort *p) { |
2741 | ||
2742 | assert(p); | |
2743 | ||
2744 | switch (p->type) { | |
718db961 LP |
2745 | |
2746 | case SOCKET_SOCKET: | |
2747 | ||
2748 | switch (p->address.type) { | |
2749 | ||
2750 | case SOCK_STREAM: | |
2751 | return "Stream"; | |
2752 | ||
2753 | case SOCK_DGRAM: | |
2754 | return "Datagram"; | |
2755 | ||
2756 | case SOCK_SEQPACKET: | |
2757 | return "SequentialPacket"; | |
2758 | ||
2759 | case SOCK_RAW: | |
2760 | if (socket_address_family(&p->address) == AF_NETLINK) | |
2761 | return "Netlink"; | |
2762 | ||
4831981d | 2763 | _fallthrough_; |
718db961 LP |
2764 | default: |
2765 | return NULL; | |
2766 | } | |
2767 | ||
2768 | case SOCKET_SPECIAL: | |
2769 | return "Special"; | |
2770 | ||
2771 | case SOCKET_MQUEUE: | |
2772 | return "MessageQueue"; | |
2773 | ||
2774 | case SOCKET_FIFO: | |
2775 | return "FIFO"; | |
2776 | ||
60252446 PS |
2777 | case SOCKET_USB_FUNCTION: |
2778 | return "USBFunction"; | |
2779 | ||
718db961 LP |
2780 | default: |
2781 | return NULL; | |
67419600 OS |
2782 | } |
2783 | } | |
2784 | ||
038ed5a4 YW |
2785 | SocketType socket_port_type_from_string(const char *s) { |
2786 | assert(s); | |
2787 | ||
e045e325 YW |
2788 | if (STR_IN_SET(s, "Stream", "Datagram", "SequentialPacket", "Netlink")) |
2789 | return SOCKET_SOCKET; | |
2790 | else if (streq(s, "Special")) | |
2791 | return SOCKET_SPECIAL; | |
2792 | else if (streq(s, "MessageQueue")) | |
2793 | return SOCKET_MQUEUE; | |
2794 | else if (streq(s, "FIFO")) | |
2795 | return SOCKET_FIFO; | |
2796 | else if (streq(s, "USBFunction")) | |
2797 | return SOCKET_USB_FUNCTION; | |
038ed5a4 YW |
2798 | else |
2799 | return _SOCKET_TYPE_INVALID; | |
2800 | } | |
2801 | ||
f2f725e5 | 2802 | _pure_ static bool socket_may_gc(Unit *u) { |
6cf6bbc2 LP |
2803 | Socket *s = SOCKET(u); |
2804 | ||
2805 | assert(u); | |
2806 | ||
f2f725e5 | 2807 | return s->n_connections == 0; |
6cf6bbc2 LP |
2808 | } |
2809 | ||
a79279c7 LP |
2810 | static int socket_accept_do(Socket *s, int fd) { |
2811 | int cfd; | |
2812 | ||
2813 | assert(s); | |
2814 | assert(fd >= 0); | |
2815 | ||
2816 | for (;;) { | |
2817 | cfd = accept4(fd, NULL, NULL, SOCK_NONBLOCK); | |
2818 | if (cfd < 0) { | |
2819 | if (errno == EINTR) | |
2820 | continue; | |
2821 | ||
2822 | return -errno; | |
2823 | } | |
2824 | ||
2825 | break; | |
2826 | } | |
2827 | ||
2828 | return cfd; | |
2829 | } | |
2830 | ||
2831 | static int socket_accept_in_cgroup(Socket *s, SocketPort *p, int fd) { | |
2832 | _cleanup_close_pair_ int pair[2] = { -1, -1 }; | |
2833 | int cfd, r; | |
2834 | pid_t pid; | |
2835 | ||
2836 | assert(s); | |
2837 | assert(p); | |
2838 | assert(fd >= 0); | |
2839 | ||
2840 | /* Similar to socket_address_listen_in_cgroup(), but for accept() rathern than socket(): make sure that any | |
2841 | * connection socket is also properly associated with the cgroup. */ | |
2842 | ||
2843 | if (!IN_SET(p->address.sockaddr.sa.sa_family, AF_INET, AF_INET6)) | |
2844 | goto shortcut; | |
2845 | ||
2846 | r = bpf_firewall_supported(); | |
2847 | if (r < 0) | |
2848 | return r; | |
2ae7ee58 | 2849 | if (r == BPF_FIREWALL_UNSUPPORTED) |
a79279c7 LP |
2850 | goto shortcut; |
2851 | ||
2852 | if (socketpair(AF_UNIX, SOCK_SEQPACKET|SOCK_CLOEXEC, 0, pair) < 0) | |
2853 | return log_unit_error_errno(UNIT(s), errno, "Failed to create communication channel: %m"); | |
2854 | ||
4c253ed1 | 2855 | r = unit_fork_helper_process(UNIT(s), "(sd-accept)", &pid); |
a79279c7 LP |
2856 | if (r < 0) |
2857 | return log_unit_error_errno(UNIT(s), r, "Failed to fork off accept stub process: %m"); | |
2858 | if (r == 0) { | |
2859 | /* Child */ | |
2860 | ||
2861 | pair[0] = safe_close(pair[0]); | |
2862 | ||
2863 | cfd = socket_accept_do(s, fd); | |
2864 | if (cfd < 0) { | |
2865 | log_unit_error_errno(UNIT(s), cfd, "Failed to accept connection socket: %m"); | |
2866 | _exit(EXIT_FAILURE); | |
2867 | } | |
2868 | ||
2869 | r = send_one_fd(pair[1], cfd, 0); | |
2870 | if (r < 0) { | |
2871 | log_unit_error_errno(UNIT(s), r, "Failed to send connection socket to parent: %m"); | |
2872 | _exit(EXIT_FAILURE); | |
2873 | } | |
2874 | ||
2875 | _exit(EXIT_SUCCESS); | |
2876 | } | |
2877 | ||
2878 | pair[1] = safe_close(pair[1]); | |
2879 | cfd = receive_one_fd(pair[0], 0); | |
2880 | ||
2881 | /* We synchronously wait for the helper, as it shouldn't be slow */ | |
d2e0ac3d | 2882 | r = wait_for_terminate_and_check("(sd-accept)", pid, WAIT_LOG_ABNORMAL); |
a79279c7 LP |
2883 | if (r < 0) { |
2884 | safe_close(cfd); | |
2885 | return r; | |
2886 | } | |
2887 | ||
2888 | if (cfd < 0) | |
2889 | return log_unit_error_errno(UNIT(s), cfd, "Failed to receive connection socket: %m"); | |
2890 | ||
2891 | return cfd; | |
2892 | ||
2893 | shortcut: | |
2894 | cfd = socket_accept_do(s, fd); | |
2895 | if (cfd < 0) | |
2896 | return log_unit_error_errno(UNIT(s), cfd, "Failed to accept connection socket: %m"); | |
2897 | ||
2898 | return cfd; | |
2899 | } | |
2900 | ||
718db961 LP |
2901 | static int socket_dispatch_io(sd_event_source *source, int fd, uint32_t revents, void *userdata) { |
2902 | SocketPort *p = userdata; | |
4f2d528d | 2903 | int cfd = -1; |
9152c765 | 2904 | |
718db961 | 2905 | assert(p); |
8d567588 | 2906 | assert(fd >= 0); |
9152c765 | 2907 | |
718db961 LP |
2908 | if (p->socket->state != SOCKET_LISTENING) |
2909 | return 0; | |
871d7de4 | 2910 | |
f2341e0a | 2911 | log_unit_debug(UNIT(p->socket), "Incoming traffic"); |
9152c765 | 2912 | |
718db961 | 2913 | if (revents != EPOLLIN) { |
641e01dc | 2914 | |
718db961 | 2915 | if (revents & EPOLLHUP) |
f2341e0a | 2916 | 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."); |
641e01dc | 2917 | else |
f2341e0a | 2918 | log_unit_error(UNIT(p->socket), "Got unexpected poll event (0x%x) on socket.", revents); |
8d567588 | 2919 | goto fail; |
4f2d528d LP |
2920 | } |
2921 | ||
718db961 LP |
2922 | if (p->socket->accept && |
2923 | p->type == SOCKET_SOCKET && | |
2924 | socket_address_can_accept(&p->address)) { | |
2925 | ||
a79279c7 LP |
2926 | cfd = socket_accept_in_cgroup(p->socket, p, fd); |
2927 | if (cfd < 0) | |
2928 | goto fail; | |
4fd5948e | 2929 | |
718db961 | 2930 | socket_apply_socket_options(p->socket, cfd); |
4f2d528d | 2931 | } |
9152c765 | 2932 | |
718db961 LP |
2933 | socket_enter_running(p->socket, cfd); |
2934 | return 0; | |
8d567588 LP |
2935 | |
2936 | fail: | |
718db961 LP |
2937 | socket_enter_stop_pre(p->socket, SOCKET_FAILURE_RESOURCES); |
2938 | return 0; | |
9152c765 LP |
2939 | } |
2940 | ||
87f0e418 LP |
2941 | static void socket_sigchld_event(Unit *u, pid_t pid, int code, int status) { |
2942 | Socket *s = SOCKET(u); | |
cfc4eb4c | 2943 | SocketResult f; |
5cb5a6ff LP |
2944 | |
2945 | assert(s); | |
034c6ed7 | 2946 | assert(pid >= 0); |
5cb5a6ff | 2947 | |
8c47c732 LP |
2948 | if (pid != s->control_pid) |
2949 | return; | |
542563ba | 2950 | |
034c6ed7 LP |
2951 | s->control_pid = 0; |
2952 | ||
1f0958f6 | 2953 | if (is_clean_exit(code, status, EXIT_CLEAN_COMMAND, NULL)) |
cfc4eb4c LP |
2954 | f = SOCKET_SUCCESS; |
2955 | else if (code == CLD_EXITED) | |
2956 | f = SOCKET_FAILURE_EXIT_CODE; | |
2957 | else if (code == CLD_KILLED) | |
2958 | f = SOCKET_FAILURE_SIGNAL; | |
2959 | else if (code == CLD_DUMPED) | |
2960 | f = SOCKET_FAILURE_CORE_DUMP; | |
2961 | else | |
a4152e3f | 2962 | assert_not_reached("Unknown sigchld code"); |
8c47c732 | 2963 | |
b708e7ce | 2964 | if (s->control_command) { |
6ea832a2 | 2965 | exec_status_exit(&s->control_command->exec_status, &s->exec_context, pid, code, status); |
a16e1123 | 2966 | |
3ed0cd26 | 2967 | if (s->control_command->flags & EXEC_COMMAND_IGNORE_FAILURE) |
cfc4eb4c | 2968 | f = SOCKET_SUCCESS; |
b708e7ce LP |
2969 | } |
2970 | ||
f2341e0a LP |
2971 | log_unit_full(u, f == SOCKET_SUCCESS ? LOG_DEBUG : LOG_NOTICE, 0, |
2972 | "Control process exited, code=%s status=%i", | |
2973 | sigchld_code_to_string(code), status); | |
034c6ed7 | 2974 | |
a0fef983 | 2975 | if (s->result == SOCKET_SUCCESS) |
cfc4eb4c LP |
2976 | s->result = f; |
2977 | ||
2978 | if (s->control_command && | |
2979 | s->control_command->command_next && | |
2980 | f == SOCKET_SUCCESS) { | |
2981 | ||
f2341e0a | 2982 | log_unit_debug(u, "Running next command for state %s", socket_state_to_string(s->state)); |
cfc4eb4c | 2983 | socket_run_next(s); |
acbb0225 | 2984 | } else { |
a16e1123 LP |
2985 | s->control_command = NULL; |
2986 | s->control_command_id = _SOCKET_EXEC_COMMAND_INVALID; | |
2987 | ||
034c6ed7 LP |
2988 | /* No further commands for this step, so let's figure |
2989 | * out what to do next */ | |
5cb5a6ff | 2990 | |
f2341e0a | 2991 | log_unit_debug(u, "Got final SIGCHLD for state %s", socket_state_to_string(s->state)); |
acbb0225 | 2992 | |
034c6ed7 LP |
2993 | switch (s->state) { |
2994 | ||
2995 | case SOCKET_START_PRE: | |
cfc4eb4c | 2996 | if (f == SOCKET_SUCCESS) |
3900e5fd | 2997 | socket_enter_start_chown(s); |
034c6ed7 | 2998 | else |
cfc4eb4c | 2999 | socket_enter_signal(s, SOCKET_FINAL_SIGTERM, f); |
034c6ed7 LP |
3000 | break; |
3001 | ||
3900e5fd LP |
3002 | case SOCKET_START_CHOWN: |
3003 | if (f == SOCKET_SUCCESS) | |
3004 | socket_enter_start_post(s); | |
3005 | else | |
3006 | socket_enter_stop_pre(s, f); | |
3007 | break; | |
3008 | ||
034c6ed7 | 3009 | case SOCKET_START_POST: |
cfc4eb4c | 3010 | if (f == SOCKET_SUCCESS) |
e9af15c3 | 3011 | socket_enter_listening(s); |
034c6ed7 | 3012 | else |
cfc4eb4c | 3013 | socket_enter_stop_pre(s, f); |
034c6ed7 LP |
3014 | break; |
3015 | ||
3016 | case SOCKET_STOP_PRE: | |
3017 | case SOCKET_STOP_PRE_SIGTERM: | |
3018 | case SOCKET_STOP_PRE_SIGKILL: | |
cfc4eb4c | 3019 | socket_enter_stop_post(s, f); |
034c6ed7 LP |
3020 | break; |
3021 | ||
3022 | case SOCKET_STOP_POST: | |
80876c20 LP |
3023 | case SOCKET_FINAL_SIGTERM: |
3024 | case SOCKET_FINAL_SIGKILL: | |
cfc4eb4c | 3025 | socket_enter_dead(s, f); |
034c6ed7 LP |
3026 | break; |
3027 | ||
3028 | default: | |
3029 | assert_not_reached("Uh, control process died at wrong time."); | |
3030 | } | |
3031 | } | |
c4e2ceae LP |
3032 | |
3033 | /* Notify clients about changed exit status */ | |
3034 | unit_add_to_dbus_queue(u); | |
034c6ed7 | 3035 | } |
5cb5a6ff | 3036 | |
718db961 LP |
3037 | static int socket_dispatch_timer(sd_event_source *source, usec_t usec, void *userdata) { |
3038 | Socket *s = SOCKET(userdata); | |
5cb5a6ff | 3039 | |
034c6ed7 | 3040 | assert(s); |
718db961 | 3041 | assert(s->timer_event_source == source); |
034c6ed7 LP |
3042 | |
3043 | switch (s->state) { | |
3044 | ||
3045 | case SOCKET_START_PRE: | |
f2341e0a | 3046 | log_unit_warning(UNIT(s), "Starting timed out. Terminating."); |
cfc4eb4c | 3047 | socket_enter_signal(s, SOCKET_FINAL_SIGTERM, SOCKET_FAILURE_TIMEOUT); |
da19d5c1 | 3048 | break; |
80876c20 | 3049 | |
3900e5fd | 3050 | case SOCKET_START_CHOWN: |
034c6ed7 | 3051 | case SOCKET_START_POST: |
f2341e0a | 3052 | log_unit_warning(UNIT(s), "Starting timed out. Stopping."); |
cfc4eb4c | 3053 | socket_enter_stop_pre(s, SOCKET_FAILURE_TIMEOUT); |
034c6ed7 LP |
3054 | break; |
3055 | ||
3056 | case SOCKET_STOP_PRE: | |
f2341e0a | 3057 | log_unit_warning(UNIT(s), "Stopping timed out. Terminating."); |
cfc4eb4c | 3058 | socket_enter_signal(s, SOCKET_STOP_PRE_SIGTERM, SOCKET_FAILURE_TIMEOUT); |
034c6ed7 LP |
3059 | break; |
3060 | ||
3061 | case SOCKET_STOP_PRE_SIGTERM: | |
4819ff03 | 3062 | if (s->kill_context.send_sigkill) { |
f2341e0a | 3063 | log_unit_warning(UNIT(s), "Stopping timed out. Killing."); |
cfc4eb4c | 3064 | socket_enter_signal(s, SOCKET_STOP_PRE_SIGKILL, SOCKET_FAILURE_TIMEOUT); |
ba035df2 | 3065 | } else { |
f2341e0a | 3066 | log_unit_warning(UNIT(s), "Stopping timed out. Skipping SIGKILL. Ignoring."); |
cfc4eb4c | 3067 | socket_enter_stop_post(s, SOCKET_FAILURE_TIMEOUT); |
ba035df2 | 3068 | } |
034c6ed7 LP |
3069 | break; |
3070 | ||
3071 | case SOCKET_STOP_PRE_SIGKILL: | |
f2341e0a | 3072 | log_unit_warning(UNIT(s), "Processes still around after SIGKILL. Ignoring."); |
cfc4eb4c | 3073 | socket_enter_stop_post(s, SOCKET_FAILURE_TIMEOUT); |
034c6ed7 LP |
3074 | break; |
3075 | ||
3076 | case SOCKET_STOP_POST: | |
f2341e0a | 3077 | log_unit_warning(UNIT(s), "Stopping timed out (2). Terminating."); |
cfc4eb4c | 3078 | socket_enter_signal(s, SOCKET_FINAL_SIGTERM, SOCKET_FAILURE_TIMEOUT); |
034c6ed7 LP |
3079 | break; |
3080 | ||
80876c20 | 3081 | case SOCKET_FINAL_SIGTERM: |
4819ff03 | 3082 | if (s->kill_context.send_sigkill) { |
f2341e0a | 3083 | log_unit_warning(UNIT(s), "Stopping timed out (2). Killing."); |
cfc4eb4c | 3084 | socket_enter_signal(s, SOCKET_FINAL_SIGKILL, SOCKET_FAILURE_TIMEOUT); |
ba035df2 | 3085 | } else { |
f2341e0a | 3086 | log_unit_warning(UNIT(s), "Stopping timed out (2). Skipping SIGKILL. Ignoring."); |
cfc4eb4c | 3087 | socket_enter_dead(s, SOCKET_FAILURE_TIMEOUT); |
ba035df2 | 3088 | } |
034c6ed7 LP |
3089 | break; |
3090 | ||
80876c20 | 3091 | case SOCKET_FINAL_SIGKILL: |
f2341e0a | 3092 | log_unit_warning(UNIT(s), "Still around after SIGKILL (2). Entering failed mode."); |
cfc4eb4c | 3093 | socket_enter_dead(s, SOCKET_FAILURE_TIMEOUT); |
034c6ed7 LP |
3094 | break; |
3095 | ||
3096 | default: | |
3097 | assert_not_reached("Timeout at wrong time."); | |
3098 | } | |
718db961 LP |
3099 | |
3100 | return 0; | |
5cb5a6ff LP |
3101 | } |
3102 | ||
79c7626d | 3103 | int socket_collect_fds(Socket *s, int **fds) { |
da6053d0 | 3104 | size_t k = 0, n = 0; |
44d8db9e | 3105 | SocketPort *p; |
da6053d0 | 3106 | int *rfds; |
44d8db9e LP |
3107 | |
3108 | assert(s); | |
3109 | assert(fds); | |
44d8db9e LP |
3110 | |
3111 | /* Called from the service code for requesting our fds */ | |
3112 | ||
15087cdb | 3113 | LIST_FOREACH(port, p, s->ports) { |
44d8db9e | 3114 | if (p->fd >= 0) |
79c7626d LP |
3115 | n++; |
3116 | n += p->n_auxiliary_fds; | |
15087cdb | 3117 | } |
44d8db9e | 3118 | |
79c7626d | 3119 | if (n <= 0) { |
de3756ab | 3120 | *fds = NULL; |
de3756ab LP |
3121 | return 0; |
3122 | } | |
3123 | ||
79c7626d | 3124 | rfds = new(int, n); |
e5403f09 | 3125 | if (!rfds) |
44d8db9e LP |
3126 | return -ENOMEM; |
3127 | ||
15087cdb | 3128 | LIST_FOREACH(port, p, s->ports) { |
da6053d0 | 3129 | size_t i; |
79c7626d | 3130 | |
44d8db9e LP |
3131 | if (p->fd >= 0) |
3132 | rfds[k++] = p->fd; | |
15087cdb PS |
3133 | for (i = 0; i < p->n_auxiliary_fds; ++i) |
3134 | rfds[k++] = p->auxiliary_fds[i]; | |
3135 | } | |
44d8db9e | 3136 | |
79c7626d | 3137 | assert(k == n); |
44d8db9e LP |
3138 | |
3139 | *fds = rfds; | |
da6053d0 | 3140 | return (int) n; |
44d8db9e LP |
3141 | } |
3142 | ||
e821075a LP |
3143 | static void socket_reset_failed(Unit *u) { |
3144 | Socket *s = SOCKET(u); | |
3145 | ||
3146 | assert(s); | |
3147 | ||
3148 | if (s->state == SOCKET_FAILED) | |
3149 | socket_set_state(s, SOCKET_DEAD); | |
3150 | ||
3151 | s->result = SOCKET_SUCCESS; | |
3152 | } | |
3153 | ||
6cf6bbc2 LP |
3154 | void socket_connection_unref(Socket *s) { |
3155 | assert(s); | |
3156 | ||
3157 | /* The service is dead. Yay! | |
3158 | * | |
35b8ca3a | 3159 | * This is strictly for one-instance-per-connection |
6cf6bbc2 LP |
3160 | * services. */ |
3161 | ||
3162 | assert(s->n_connections > 0); | |
3163 | s->n_connections--; | |
3164 | ||
f2341e0a | 3165 | log_unit_debug(UNIT(s), "One connection closed, %u left.", s->n_connections); |
5632e374 LP |
3166 | } |
3167 | ||
d137a488 UTL |
3168 | static void socket_trigger_notify(Unit *u, Unit *other) { |
3169 | Socket *s = SOCKET(u); | |
d137a488 UTL |
3170 | |
3171 | assert(u); | |
3172 | assert(other); | |
3173 | ||
d14e3a0d LP |
3174 | /* Filter out invocations with bogus state */ |
3175 | if (other->load_state != UNIT_LOADED || other->type != UNIT_SERVICE) | |
3176 | return; | |
3177 | ||
3178 | /* Don't propagate state changes from the service if we are already down */ | |
3179 | if (!IN_SET(s->state, SOCKET_RUNNING, SOCKET_LISTENING)) | |
d137a488 UTL |
3180 | return; |
3181 | ||
d14e3a0d LP |
3182 | /* We don't care for the service state if we are in Accept=yes mode */ |
3183 | if (s->accept) | |
3184 | return; | |
3185 | ||
3186 | /* Propagate start limit hit state */ | |
6bf0f408 LP |
3187 | if (other->start_limit_hit) { |
3188 | socket_enter_stop_pre(s, SOCKET_FAILURE_SERVICE_START_LIMIT_HIT); | |
d137a488 | 3189 | return; |
6bf0f408 | 3190 | } |
d137a488 | 3191 | |
d14e3a0d LP |
3192 | /* Don't propagate anything if there's still a job queued */ |
3193 | if (other->job) | |
6bf0f408 | 3194 | return; |
d137a488 | 3195 | |
6bf0f408 LP |
3196 | if (IN_SET(SERVICE(other)->state, |
3197 | SERVICE_DEAD, SERVICE_FAILED, | |
3198 | SERVICE_FINAL_SIGTERM, SERVICE_FINAL_SIGKILL, | |
3199 | SERVICE_AUTO_RESTART)) | |
3200 | socket_enter_listening(s); | |
d137a488 | 3201 | |
6bf0f408 | 3202 | if (SERVICE(other)->state == SERVICE_RUNNING) |
d137a488 UTL |
3203 | socket_set_state(s, SOCKET_RUNNING); |
3204 | } | |
3205 | ||
718db961 | 3206 | static int socket_kill(Unit *u, KillWho who, int signo, sd_bus_error *error) { |
814cc562 | 3207 | return unit_kill_common(u, who, signo, -1, SOCKET(u)->control_pid, error); |
8a0867d6 LP |
3208 | } |
3209 | ||
7a7821c8 | 3210 | static int socket_get_timeout(Unit *u, usec_t *timeout) { |
68db7a3b | 3211 | Socket *s = SOCKET(u); |
7a7821c8 | 3212 | usec_t t; |
68db7a3b ZJS |
3213 | int r; |
3214 | ||
3215 | if (!s->timer_event_source) | |
3216 | return 0; | |
3217 | ||
7a7821c8 | 3218 | r = sd_event_source_get_time(s->timer_event_source, &t); |
68db7a3b ZJS |
3219 | if (r < 0) |
3220 | return r; | |
7a7821c8 LP |
3221 | if (t == USEC_INFINITY) |
3222 | return 0; | |
68db7a3b | 3223 | |
7a7821c8 | 3224 | *timeout = t; |
68db7a3b ZJS |
3225 | return 1; |
3226 | } | |
3227 | ||
8dd4c05b LP |
3228 | char *socket_fdname(Socket *s) { |
3229 | assert(s); | |
3230 | ||
3231 | /* Returns the name to use for $LISTEN_NAMES. If the user | |
3232 | * didn't specify anything specifically, use the socket unit's | |
3233 | * name as fallback. */ | |
3234 | ||
84500122 | 3235 | return s->fdname ?: UNIT(s)->id; |
8dd4c05b LP |
3236 | } |
3237 | ||
291d565a LP |
3238 | static int socket_control_pid(Unit *u) { |
3239 | Socket *s = SOCKET(u); | |
3240 | ||
3241 | assert(s); | |
3242 | ||
3243 | return s->control_pid; | |
3244 | } | |
3245 | ||
a16e1123 | 3246 | static const char* const socket_exec_command_table[_SOCKET_EXEC_COMMAND_MAX] = { |
836bb1cd YW |
3247 | [SOCKET_EXEC_START_PRE] = "ExecStartPre", |
3248 | [SOCKET_EXEC_START_CHOWN] = "ExecStartChown", | |
3249 | [SOCKET_EXEC_START_POST] = "ExecStartPost", | |
3250 | [SOCKET_EXEC_STOP_PRE] = "ExecStopPre", | |
3251 | [SOCKET_EXEC_STOP_POST] = "ExecStopPost" | |
a16e1123 LP |
3252 | }; |
3253 | ||
3254 | DEFINE_STRING_TABLE_LOOKUP(socket_exec_command, SocketExecCommand); | |
3255 | ||
cfc4eb4c LP |
3256 | static const char* const socket_result_table[_SOCKET_RESULT_MAX] = { |
3257 | [SOCKET_SUCCESS] = "success", | |
3258 | [SOCKET_FAILURE_RESOURCES] = "resources", | |
3259 | [SOCKET_FAILURE_TIMEOUT] = "timeout", | |
3260 | [SOCKET_FAILURE_EXIT_CODE] = "exit-code", | |
3261 | [SOCKET_FAILURE_SIGNAL] = "signal", | |
c2f34808 | 3262 | [SOCKET_FAILURE_CORE_DUMP] = "core-dump", |
07299350 | 3263 | [SOCKET_FAILURE_START_LIMIT_HIT] = "start-limit-hit", |
8b26cdbd | 3264 | [SOCKET_FAILURE_TRIGGER_LIMIT_HIT] = "trigger-limit-hit", |
6bf0f408 | 3265 | [SOCKET_FAILURE_SERVICE_START_LIMIT_HIT] = "service-start-limit-hit" |
cfc4eb4c LP |
3266 | }; |
3267 | ||
3268 | DEFINE_STRING_TABLE_LOOKUP(socket_result, SocketResult); | |
3269 | ||
87f0e418 | 3270 | const UnitVTable socket_vtable = { |
7d17cfbc | 3271 | .object_size = sizeof(Socket), |
718db961 LP |
3272 | .exec_context_offset = offsetof(Socket, exec_context), |
3273 | .cgroup_context_offset = offsetof(Socket, cgroup_context), | |
3274 | .kill_context_offset = offsetof(Socket, kill_context), | |
613b411c | 3275 | .exec_runtime_offset = offsetof(Socket, exec_runtime), |
29206d46 | 3276 | .dynamic_creds_offset = offsetof(Socket, dynamic_creds), |
3ef63c31 | 3277 | |
f975e971 LP |
3278 | .sections = |
3279 | "Unit\0" | |
3280 | "Socket\0" | |
3281 | "Install\0", | |
4ad49000 | 3282 | .private_section = "Socket", |
71645aca | 3283 | |
9c0320e7 YW |
3284 | .can_transient = true, |
3285 | ||
034c6ed7 LP |
3286 | .init = socket_init, |
3287 | .done = socket_done, | |
a16e1123 LP |
3288 | .load = socket_load, |
3289 | ||
3290 | .coldplug = socket_coldplug, | |
034c6ed7 | 3291 | |
5cb5a6ff LP |
3292 | .dump = socket_dump, |
3293 | ||
542563ba LP |
3294 | .start = socket_start, |
3295 | .stop = socket_stop, | |
5cb5a6ff | 3296 | |
718db961 LP |
3297 | .kill = socket_kill, |
3298 | ||
68db7a3b ZJS |
3299 | .get_timeout = socket_get_timeout, |
3300 | ||
a16e1123 LP |
3301 | .serialize = socket_serialize, |
3302 | .deserialize_item = socket_deserialize_item, | |
01e10de3 | 3303 | .distribute_fds = socket_distribute_fds, |
a16e1123 | 3304 | |
5cb5a6ff | 3305 | .active_state = socket_active_state, |
10a94420 | 3306 | .sub_state_to_string = socket_sub_state_to_string, |
5cb5a6ff | 3307 | |
f2f725e5 | 3308 | .may_gc = socket_may_gc, |
6cf6bbc2 | 3309 | |
034c6ed7 | 3310 | .sigchld_event = socket_sigchld_event, |
4139c1b2 | 3311 | |
d137a488 UTL |
3312 | .trigger_notify = socket_trigger_notify, |
3313 | ||
fdf20a31 | 3314 | .reset_failed = socket_reset_failed, |
5632e374 | 3315 | |
291d565a LP |
3316 | .control_pid = socket_control_pid, |
3317 | ||
718db961 | 3318 | .bus_vtable = bus_socket_vtable, |
74c964d3 LP |
3319 | .bus_set_property = bus_socket_set_property, |
3320 | .bus_commit_properties = bus_socket_commit_properties, | |
c6918296 MS |
3321 | |
3322 | .status_message_formats = { | |
3323 | /*.starting_stopping = { | |
3324 | [0] = "Starting socket %s...", | |
3325 | [1] = "Stopping socket %s...", | |
3326 | },*/ | |
3327 | .finished_start_job = { | |
3328 | [JOB_DONE] = "Listening on %s.", | |
3329 | [JOB_FAILED] = "Failed to listen on %s.", | |
c6918296 MS |
3330 | [JOB_TIMEOUT] = "Timed out starting %s.", |
3331 | }, | |
3332 | .finished_stop_job = { | |
3333 | [JOB_DONE] = "Closed %s.", | |
3334 | [JOB_FAILED] = "Failed stopping %s.", | |
3335 | [JOB_TIMEOUT] = "Timed out stopping %s.", | |
3336 | }, | |
3337 | }, | |
5cb5a6ff | 3338 | }; |