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Commit | Line | Data |
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53e1b683 | 1 | /* SPDX-License-Identifier: LGPL-2.1+ */ |
a7334b09 | 2 | |
e8da24a6 | 3 | #include <arpa/inet.h> |
83c60c9f LP |
4 | #include <errno.h> |
5 | #include <fcntl.h> | |
916abb21 | 6 | #include <mqueue.h> |
e8da24a6 LP |
7 | #include <netinet/tcp.h> |
8 | #include <signal.h> | |
9 | #include <sys/epoll.h> | |
10 | #include <sys/stat.h> | |
11 | #include <unistd.h> | |
62bc4efc | 12 | #include <linux/sctp.h> |
83c60c9f | 13 | |
b5efdb8a | 14 | #include "alloc-util.h" |
a79279c7 | 15 | #include "bpf-firewall.h" |
e8da24a6 LP |
16 | #include "bus-error.h" |
17 | #include "bus-util.h" | |
18 | #include "copy.h" | |
19 | #include "dbus-socket.h" | |
20 | #include "def.h" | |
21 | #include "exit-status.h" | |
3ffd4af2 | 22 | #include "fd-util.h" |
f97b34a6 | 23 | #include "format-util.h" |
95f7fbbf | 24 | #include "fs-util.h" |
a79279c7 | 25 | #include "in-addr-util.h" |
60d9771c | 26 | #include "io-util.h" |
e8da24a6 | 27 | #include "label.h" |
83c60c9f | 28 | #include "log.h" |
e8da24a6 | 29 | #include "missing.h" |
49e942b2 | 30 | #include "mkdir.h" |
6bedfcbb | 31 | #include "parse-util.h" |
9eb977db | 32 | #include "path-util.h" |
7b3e062c | 33 | #include "process-util.h" |
d7b8eec7 | 34 | #include "selinux-util.h" |
24882e06 | 35 | #include "signal-util.h" |
e8da24a6 | 36 | #include "smack-util.h" |
24882e06 | 37 | #include "socket.h" |
e045e325 | 38 | #include "socket-protocol-list.h" |
e8da24a6 | 39 | #include "special.h" |
8b43440b | 40 | #include "string-table.h" |
07630cea | 41 | #include "string-util.h" |
e8da24a6 LP |
42 | #include "strv.h" |
43 | #include "unit-name.h" | |
e8da24a6 | 44 | #include "unit.h" |
b1d4f8e1 | 45 | #include "user-util.h" |
83c60c9f | 46 | |
166cf510 ZJS |
47 | struct SocketPeer { |
48 | unsigned n_ref; | |
49 | ||
50 | Socket *socket; | |
51 | union sockaddr_union peer; | |
41733ae1 | 52 | socklen_t peer_salen; |
166cf510 ZJS |
53 | }; |
54 | ||
acbb0225 | 55 | static const UnitActiveState state_translation_table[_SOCKET_STATE_MAX] = { |
87f0e418 LP |
56 | [SOCKET_DEAD] = UNIT_INACTIVE, |
57 | [SOCKET_START_PRE] = UNIT_ACTIVATING, | |
3900e5fd | 58 | [SOCKET_START_CHOWN] = UNIT_ACTIVATING, |
87f0e418 LP |
59 | [SOCKET_START_POST] = UNIT_ACTIVATING, |
60 | [SOCKET_LISTENING] = UNIT_ACTIVE, | |
61 | [SOCKET_RUNNING] = UNIT_ACTIVE, | |
62 | [SOCKET_STOP_PRE] = UNIT_DEACTIVATING, | |
63 | [SOCKET_STOP_PRE_SIGTERM] = UNIT_DEACTIVATING, | |
64 | [SOCKET_STOP_PRE_SIGKILL] = UNIT_DEACTIVATING, | |
65 | [SOCKET_STOP_POST] = UNIT_DEACTIVATING, | |
80876c20 LP |
66 | [SOCKET_FINAL_SIGTERM] = UNIT_DEACTIVATING, |
67 | [SOCKET_FINAL_SIGKILL] = UNIT_DEACTIVATING, | |
fdf20a31 | 68 | [SOCKET_FAILED] = UNIT_FAILED |
83c60c9f | 69 | }; |
5cb5a6ff | 70 | |
718db961 LP |
71 | static int socket_dispatch_io(sd_event_source *source, int fd, uint32_t revents, void *userdata); |
72 | static int socket_dispatch_timer(sd_event_source *source, usec_t usec, void *userdata); | |
73 | ||
a16e1123 LP |
74 | static void socket_init(Unit *u) { |
75 | Socket *s = SOCKET(u); | |
76 | ||
77 | assert(u); | |
ac155bb8 | 78 | assert(u->load_state == UNIT_STUB); |
a16e1123 | 79 | |
a16e1123 | 80 | s->backlog = SOMAXCONN; |
1f19a534 | 81 | s->timeout_usec = u->manager->default_timeout_start_usec; |
a16e1123 | 82 | s->directory_mode = 0755; |
9131f660 | 83 | s->socket_mode = 0666; |
a16e1123 | 84 | |
6cf6bbc2 LP |
85 | s->max_connections = 64; |
86 | ||
4fd5948e | 87 | s->priority = -1; |
4fd5948e LP |
88 | s->ip_tos = -1; |
89 | s->ip_ttl = -1; | |
4fd5948e | 90 | s->mark = -1; |
4fd5948e | 91 | |
ac155bb8 MS |
92 | s->exec_context.std_output = u->manager->default_std_output; |
93 | s->exec_context.std_error = u->manager->default_std_error; | |
085afe36 | 94 | |
a16e1123 | 95 | s->control_command_id = _SOCKET_EXEC_COMMAND_INVALID; |
8b26cdbd | 96 | |
1f15ce28 LP |
97 | s->trigger_limit.interval = USEC_INFINITY; |
98 | s->trigger_limit.burst = (unsigned) -1; | |
a16e1123 | 99 | } |
acbb0225 | 100 | |
5e94833f LP |
101 | static void socket_unwatch_control_pid(Socket *s) { |
102 | assert(s); | |
103 | ||
104 | if (s->control_pid <= 0) | |
105 | return; | |
106 | ||
107 | unit_unwatch_pid(UNIT(s), s->control_pid); | |
108 | s->control_pid = 0; | |
109 | } | |
110 | ||
15087cdb | 111 | static void socket_cleanup_fd_list(SocketPort *p) { |
3ffd4af2 | 112 | assert(p); |
15087cdb | 113 | |
3ffd4af2 | 114 | close_many(p->auxiliary_fds, p->n_auxiliary_fds); |
15087cdb PS |
115 | p->auxiliary_fds = mfree(p->auxiliary_fds); |
116 | p->n_auxiliary_fds = 0; | |
117 | } | |
118 | ||
74051b9b | 119 | void socket_free_ports(Socket *s) { |
034c6ed7 LP |
120 | SocketPort *p; |
121 | ||
122 | assert(s); | |
123 | ||
124 | while ((p = s->ports)) { | |
71fda00f | 125 | LIST_REMOVE(port, s->ports, p); |
034c6ed7 | 126 | |
718db961 LP |
127 | sd_event_source_unref(p->event_source); |
128 | ||
15087cdb | 129 | socket_cleanup_fd_list(p); |
03e334a1 | 130 | safe_close(p->fd); |
034c6ed7 LP |
131 | free(p->path); |
132 | free(p); | |
133 | } | |
74051b9b LP |
134 | } |
135 | ||
136 | static void socket_done(Unit *u) { | |
137 | Socket *s = SOCKET(u); | |
9d565427 | 138 | SocketPeer *p; |
74051b9b LP |
139 | |
140 | assert(s); | |
141 | ||
142 | socket_free_ports(s); | |
034c6ed7 | 143 | |
9a73653c | 144 | while ((p = set_steal_first(s->peers_by_address))) |
9d565427 SS |
145 | p->socket = NULL; |
146 | ||
9a73653c | 147 | s->peers_by_address = set_free(s->peers_by_address); |
9d565427 | 148 | |
e8a565cb | 149 | s->exec_runtime = exec_runtime_unref(s->exec_runtime, false); |
e537352b | 150 | exec_command_free_array(s->exec_command, _SOCKET_EXEC_COMMAND_MAX); |
034c6ed7 LP |
151 | s->control_command = NULL; |
152 | ||
29206d46 LP |
153 | dynamic_creds_unref(&s->dynamic_creds); |
154 | ||
5e94833f | 155 | socket_unwatch_control_pid(s); |
034c6ed7 | 156 | |
57020a3a | 157 | unit_ref_unset(&s->service); |
034c6ed7 | 158 | |
a1e58e8e LP |
159 | s->tcp_congestion = mfree(s->tcp_congestion); |
160 | s->bind_to_device = mfree(s->bind_to_device); | |
acbb0225 | 161 | |
0a78712e DM |
162 | s->smack = mfree(s->smack); |
163 | s->smack_ip_in = mfree(s->smack_ip_in); | |
164 | s->smack_ip_out = mfree(s->smack_ip_out); | |
0eb59ccf | 165 | |
811ba7a0 LP |
166 | strv_free(s->symlinks); |
167 | ||
0a78712e DM |
168 | s->user = mfree(s->user); |
169 | s->group = mfree(s->group); | |
3900e5fd | 170 | |
a97b23d6 DM |
171 | s->fdname = mfree(s->fdname); |
172 | ||
718db961 LP |
173 | s->timer_event_source = sd_event_source_unref(s->timer_event_source); |
174 | } | |
175 | ||
36c16a7c | 176 | static int socket_arm_timer(Socket *s, usec_t usec) { |
718db961 LP |
177 | int r; |
178 | ||
179 | assert(s); | |
180 | ||
718db961 | 181 | if (s->timer_event_source) { |
36c16a7c | 182 | r = sd_event_source_set_time(s->timer_event_source, usec); |
718db961 LP |
183 | if (r < 0) |
184 | return r; | |
185 | ||
186 | return sd_event_source_set_enabled(s->timer_event_source, SD_EVENT_ONESHOT); | |
187 | } | |
188 | ||
36c16a7c LP |
189 | if (usec == USEC_INFINITY) |
190 | return 0; | |
191 | ||
7dfbe2e3 | 192 | r = sd_event_add_time( |
6a0f1f6d LP |
193 | UNIT(s)->manager->event, |
194 | &s->timer_event_source, | |
195 | CLOCK_MONOTONIC, | |
36c16a7c | 196 | usec, 0, |
6a0f1f6d | 197 | socket_dispatch_timer, s); |
7dfbe2e3 TG |
198 | if (r < 0) |
199 | return r; | |
200 | ||
201 | (void) sd_event_source_set_description(s->timer_event_source, "socket-timer"); | |
202 | ||
203 | return 0; | |
5cb5a6ff LP |
204 | } |
205 | ||
8b835fcc ZJS |
206 | int socket_instantiate_service(Socket *s) { |
207 | _cleanup_free_ char *prefix = NULL, *name = NULL; | |
b15bdda8 LP |
208 | int r; |
209 | Unit *u; | |
210 | ||
211 | assert(s); | |
212 | ||
213 | /* This fills in s->service if it isn't filled in yet. For | |
214 | * Accept=yes sockets we create the next connection service | |
215 | * here. For Accept=no this is mostly a NOP since the service | |
216 | * is figured out at load time anyway. */ | |
217 | ||
7410616c | 218 | if (UNIT_DEREF(s->service)) |
b15bdda8 LP |
219 | return 0; |
220 | ||
7410616c LP |
221 | if (!s->accept) |
222 | return 0; | |
223 | ||
224 | r = unit_name_to_prefix(UNIT(s)->id, &prefix); | |
225 | if (r < 0) | |
226 | return r; | |
b15bdda8 | 227 | |
315db1a8 | 228 | if (asprintf(&name, "%s@%u.service", prefix, s->n_accepted) < 0) |
b15bdda8 LP |
229 | return -ENOMEM; |
230 | ||
1124fe6f | 231 | r = manager_load_unit(UNIT(s)->manager, name, NULL, NULL, &u); |
b15bdda8 LP |
232 | if (r < 0) |
233 | return r; | |
234 | ||
7f7d01ed | 235 | unit_ref_set(&s->service, UNIT(s), u); |
57020a3a | 236 | |
eef85c4a | 237 | return unit_add_two_dependencies(UNIT(s), UNIT_BEFORE, UNIT_TRIGGERS, u, false, UNIT_DEPENDENCY_IMPLICIT); |
b15bdda8 LP |
238 | } |
239 | ||
4f2d528d LP |
240 | static bool have_non_accept_socket(Socket *s) { |
241 | SocketPort *p; | |
242 | ||
243 | assert(s); | |
244 | ||
245 | if (!s->accept) | |
246 | return true; | |
247 | ||
dd5ad9d4 LP |
248 | LIST_FOREACH(port, p, s->ports) { |
249 | ||
250 | if (p->type != SOCKET_SOCKET) | |
251 | return true; | |
252 | ||
4f2d528d LP |
253 | if (!socket_address_can_accept(&p->address)) |
254 | return true; | |
dd5ad9d4 | 255 | } |
4f2d528d LP |
256 | |
257 | return false; | |
258 | } | |
259 | ||
eef85c4a | 260 | static int socket_add_mount_dependencies(Socket *s) { |
6e2ef85b | 261 | SocketPort *p; |
6e2ef85b LP |
262 | int r; |
263 | ||
264 | assert(s); | |
6e2ef85b | 265 | |
a57f7e2c LP |
266 | LIST_FOREACH(port, p, s->ports) { |
267 | const char *path = NULL; | |
6e2ef85b | 268 | |
a57f7e2c LP |
269 | if (p->type == SOCKET_SOCKET) |
270 | path = socket_address_get_path(&p->address); | |
60252446 | 271 | else if (IN_SET(p->type, SOCKET_FIFO, SOCKET_SPECIAL, SOCKET_USB_FUNCTION)) |
a57f7e2c | 272 | path = p->path; |
6e2ef85b | 273 | |
a57f7e2c LP |
274 | if (!path) |
275 | continue; | |
6e2ef85b | 276 | |
eef85c4a | 277 | r = unit_require_mounts_for(UNIT(s), path, UNIT_DEPENDENCY_FILE); |
b87705cd | 278 | if (r < 0) |
6e2ef85b | 279 | return r; |
b87705cd | 280 | } |
6e2ef85b LP |
281 | |
282 | return 0; | |
283 | } | |
284 | ||
eef85c4a | 285 | static int socket_add_device_dependencies(Socket *s) { |
6e2ef85b | 286 | char *t; |
6e2ef85b LP |
287 | |
288 | assert(s); | |
289 | ||
7d0c710d | 290 | if (!s->bind_to_device || streq(s->bind_to_device, "lo")) |
6e2ef85b LP |
291 | return 0; |
292 | ||
63c372cb | 293 | t = strjoina("/sys/subsystem/net/devices/", s->bind_to_device); |
eef85c4a | 294 | return unit_add_node_dependency(UNIT(s), t, false, UNIT_BINDS_TO, UNIT_DEPENDENCY_FILE); |
6e2ef85b LP |
295 | } |
296 | ||
a40eb732 LP |
297 | static int socket_add_default_dependencies(Socket *s) { |
298 | int r; | |
299 | assert(s); | |
300 | ||
4c9ea260 LP |
301 | if (!UNIT(s)->default_dependencies) |
302 | return 0; | |
303 | ||
eef85c4a | 304 | r = unit_add_dependency_by_name(UNIT(s), UNIT_BEFORE, SPECIAL_SOCKETS_TARGET, NULL, true, UNIT_DEPENDENCY_DEFAULT); |
e3d84721 LP |
305 | if (r < 0) |
306 | return r; | |
2a77d31d | 307 | |
463d0d15 | 308 | if (MANAGER_IS_SYSTEM(UNIT(s)->manager)) { |
eef85c4a | 309 | r = unit_add_two_dependencies_by_name(UNIT(s), UNIT_AFTER, UNIT_REQUIRES, SPECIAL_SYSINIT_TARGET, NULL, true, UNIT_DEPENDENCY_DEFAULT); |
e3d84721 | 310 | if (r < 0) |
a40eb732 | 311 | return r; |
2a77d31d | 312 | } |
a40eb732 | 313 | |
eef85c4a | 314 | return unit_add_two_dependencies_by_name(UNIT(s), UNIT_BEFORE, UNIT_CONFLICTS, SPECIAL_SHUTDOWN_TARGET, NULL, true, UNIT_DEPENDENCY_DEFAULT); |
a40eb732 LP |
315 | } |
316 | ||
44a6b1b6 | 317 | _pure_ static bool socket_has_exec(Socket *s) { |
4cfc6dbe LP |
318 | unsigned i; |
319 | assert(s); | |
320 | ||
321 | for (i = 0; i < _SOCKET_EXEC_COMMAND_MAX; i++) | |
322 | if (s->exec_command[i]) | |
323 | return true; | |
324 | ||
325 | return false; | |
326 | } | |
327 | ||
e821075a LP |
328 | static int socket_add_extras(Socket *s) { |
329 | Unit *u = UNIT(s); | |
e537352b | 330 | int r; |
44d8db9e | 331 | |
e821075a | 332 | assert(s); |
57020a3a | 333 | |
1f15ce28 LP |
334 | /* Pick defaults for the trigger limit, if nothing was explicitly configured. We pick a relatively high limit |
335 | * in Accept=yes mode, and a lower limit for Accept=no. Reason: in Accept=yes mode we are invoking accept() | |
336 | * ourselves before the trigger limit can hit, thus incoming connections are taken off the socket queue quickly | |
337 | * and reliably. This is different for Accept=no, where the spawned service has to take the incoming traffic | |
338 | * off the queues, which it might not necessarily do. Moreover, while Accept=no services are supposed to | |
339 | * process whatever is queued in one go, and thus should normally never have to be started frequently. This is | |
340 | * different for Accept=yes where each connection is processed by a new service instance, and thus frequent | |
341 | * service starts are typical. */ | |
342 | ||
343 | if (s->trigger_limit.interval == USEC_INFINITY) | |
344 | s->trigger_limit.interval = 2 * USEC_PER_SEC; | |
345 | ||
346 | if (s->trigger_limit.burst == (unsigned) -1) { | |
347 | if (s->accept) | |
348 | s->trigger_limit.burst = 200; | |
349 | else | |
350 | s->trigger_limit.burst = 20; | |
351 | } | |
352 | ||
e821075a | 353 | if (have_non_accept_socket(s)) { |
23a177ef | 354 | |
e821075a LP |
355 | if (!UNIT_DEREF(s->service)) { |
356 | Unit *x; | |
57020a3a | 357 | |
e821075a | 358 | r = unit_load_related_unit(u, ".service", &x); |
57020a3a | 359 | if (r < 0) |
4f2d528d | 360 | return r; |
e821075a | 361 | |
7f7d01ed | 362 | unit_ref_set(&s->service, u, x); |
4f2d528d | 363 | } |
44d8db9e | 364 | |
eef85c4a | 365 | r = unit_add_two_dependencies(u, UNIT_BEFORE, UNIT_TRIGGERS, UNIT_DEREF(s->service), true, UNIT_DEPENDENCY_IMPLICIT); |
e821075a | 366 | if (r < 0) |
6e2ef85b | 367 | return r; |
e821075a | 368 | } |
6e2ef85b | 369 | |
eef85c4a | 370 | r = socket_add_mount_dependencies(s); |
e821075a LP |
371 | if (r < 0) |
372 | return r; | |
6e2ef85b | 373 | |
eef85c4a | 374 | r = socket_add_device_dependencies(s); |
e821075a LP |
375 | if (r < 0) |
376 | return r; | |
377 | ||
598459ce | 378 | r = unit_patch_contexts(u); |
e821075a LP |
379 | if (r < 0) |
380 | return r; | |
381 | ||
382 | if (socket_has_exec(s)) { | |
383 | r = unit_add_exec_dependencies(u, &s->exec_context); | |
384 | if (r < 0) | |
385 | return r; | |
e821075a | 386 | } |
a016b922 | 387 | |
88af31f9 LP |
388 | r = unit_set_default_slice(u); |
389 | if (r < 0) | |
390 | return r; | |
391 | ||
4c9ea260 LP |
392 | r = socket_add_default_dependencies(s); |
393 | if (r < 0) | |
394 | return r; | |
e821075a LP |
395 | |
396 | return 0; | |
397 | } | |
398 | ||
811ba7a0 LP |
399 | static const char *socket_find_symlink_target(Socket *s) { |
400 | const char *found = NULL; | |
401 | SocketPort *p; | |
402 | ||
403 | LIST_FOREACH(port, p, s->ports) { | |
404 | const char *f = NULL; | |
405 | ||
406 | switch (p->type) { | |
407 | ||
408 | case SOCKET_FIFO: | |
409 | f = p->path; | |
410 | break; | |
411 | ||
412 | case SOCKET_SOCKET: | |
b9495e8d | 413 | f = socket_address_get_path(&p->address); |
811ba7a0 LP |
414 | break; |
415 | ||
416 | default: | |
417 | break; | |
418 | } | |
419 | ||
420 | if (f) { | |
421 | if (found) | |
422 | return NULL; | |
423 | ||
424 | found = f; | |
425 | } | |
426 | } | |
427 | ||
428 | return found; | |
429 | } | |
430 | ||
e821075a LP |
431 | static int socket_verify(Socket *s) { |
432 | assert(s); | |
433 | ||
434 | if (UNIT(s)->load_state != UNIT_LOADED) | |
435 | return 0; | |
436 | ||
437 | if (!s->ports) { | |
da3bddc9 | 438 | log_unit_error(UNIT(s), "Unit has no Listen setting (ListenStream=, ListenDatagram=, ListenFIFO=, ...). Refusing."); |
6f40aa45 | 439 | return -ENOEXEC; |
e821075a LP |
440 | } |
441 | ||
442 | if (s->accept && have_non_accept_socket(s)) { | |
f2341e0a | 443 | log_unit_error(UNIT(s), "Unit configured for accepting sockets, but sockets are non-accepting. Refusing."); |
6f40aa45 | 444 | return -ENOEXEC; |
e821075a LP |
445 | } |
446 | ||
447 | if (s->accept && s->max_connections <= 0) { | |
f2341e0a | 448 | log_unit_error(UNIT(s), "MaxConnection= setting too small. Refusing."); |
6f40aa45 | 449 | return -ENOEXEC; |
e821075a | 450 | } |
e06c73cc | 451 | |
e821075a | 452 | if (s->accept && UNIT_DEREF(s->service)) { |
f2341e0a | 453 | log_unit_error(UNIT(s), "Explicit service configuration for accepting socket units not supported. Refusing."); |
6f40aa45 | 454 | return -ENOEXEC; |
e821075a LP |
455 | } |
456 | ||
457 | if (s->exec_context.pam_name && s->kill_context.kill_mode != KILL_CONTROL_GROUP) { | |
f2341e0a | 458 | log_unit_error(UNIT(s), "Unit has PAM enabled. Kill mode must be set to 'control-group'. Refusing."); |
6f40aa45 | 459 | return -ENOEXEC; |
e821075a LP |
460 | } |
461 | ||
811ba7a0 | 462 | if (!strv_isempty(s->symlinks) && !socket_find_symlink_target(s)) { |
f2341e0a | 463 | log_unit_error(UNIT(s), "Unit has symlinks set but none or more than one node in the file system. Refusing."); |
6f40aa45 | 464 | return -ENOEXEC; |
811ba7a0 LP |
465 | } |
466 | ||
e821075a LP |
467 | return 0; |
468 | } | |
469 | ||
9d565427 SS |
470 | static void peer_address_hash_func(const void *p, struct siphash *state) { |
471 | const SocketPeer *s = p; | |
472 | ||
473 | assert(s); | |
474 | ||
475 | if (s->peer.sa.sa_family == AF_INET) | |
476 | siphash24_compress(&s->peer.in.sin_addr, sizeof(s->peer.in.sin_addr), state); | |
41733ae1 | 477 | else if (s->peer.sa.sa_family == AF_INET6) |
9d565427 | 478 | siphash24_compress(&s->peer.in6.sin6_addr, sizeof(s->peer.in6.sin6_addr), state); |
359a5bcf SH |
479 | else if (s->peer.sa.sa_family == AF_VSOCK) |
480 | siphash24_compress(&s->peer.vm.svm_cid, sizeof(s->peer.vm.svm_cid), state); | |
41733ae1 LP |
481 | else |
482 | assert_not_reached("Unknown address family."); | |
9d565427 SS |
483 | } |
484 | ||
485 | static int peer_address_compare_func(const void *a, const void *b) { | |
486 | const SocketPeer *x = a, *y = b; | |
487 | ||
488 | if (x->peer.sa.sa_family < y->peer.sa.sa_family) | |
489 | return -1; | |
490 | if (x->peer.sa.sa_family > y->peer.sa.sa_family) | |
491 | return 1; | |
492 | ||
493 | switch(x->peer.sa.sa_family) { | |
494 | case AF_INET: | |
495 | return memcmp(&x->peer.in.sin_addr, &y->peer.in.sin_addr, sizeof(x->peer.in.sin_addr)); | |
496 | case AF_INET6: | |
497 | return memcmp(&x->peer.in6.sin6_addr, &y->peer.in6.sin6_addr, sizeof(x->peer.in6.sin6_addr)); | |
359a5bcf SH |
498 | case AF_VSOCK: |
499 | if (x->peer.vm.svm_cid < y->peer.vm.svm_cid) | |
500 | return -1; | |
501 | if (x->peer.vm.svm_cid > y->peer.vm.svm_cid) | |
502 | return 1; | |
503 | return 0; | |
9d565427 | 504 | } |
166cf510 | 505 | assert_not_reached("Black sheep in the family!"); |
9d565427 SS |
506 | } |
507 | ||
508 | const struct hash_ops peer_address_hash_ops = { | |
509 | .hash = peer_address_hash_func, | |
510 | .compare = peer_address_compare_func | |
511 | }; | |
512 | ||
e821075a LP |
513 | static int socket_load(Unit *u) { |
514 | Socket *s = SOCKET(u); | |
515 | int r; | |
516 | ||
517 | assert(u); | |
518 | assert(u->load_state == UNIT_STUB); | |
519 | ||
9a73653c | 520 | r = set_ensure_allocated(&s->peers_by_address, &peer_address_hash_ops); |
9d565427 SS |
521 | if (r < 0) |
522 | return r; | |
523 | ||
e821075a LP |
524 | r = unit_load_fragment_and_dropin(u); |
525 | if (r < 0) | |
526 | return r; | |
527 | ||
528 | if (u->load_state == UNIT_LOADED) { | |
529 | /* This is a new unit? Then let's add in some extras */ | |
530 | r = socket_add_extras(s); | |
e06c73cc LP |
531 | if (r < 0) |
532 | return r; | |
23a177ef LP |
533 | } |
534 | ||
4f2d528d | 535 | return socket_verify(s); |
44d8db9e LP |
536 | } |
537 | ||
166cf510 ZJS |
538 | static SocketPeer *socket_peer_new(void) { |
539 | SocketPeer *p; | |
540 | ||
541 | p = new0(SocketPeer, 1); | |
542 | if (!p) | |
543 | return NULL; | |
544 | ||
545 | p->n_ref = 1; | |
546 | ||
547 | return p; | |
548 | } | |
549 | ||
550 | SocketPeer *socket_peer_ref(SocketPeer *p) { | |
551 | if (!p) | |
552 | return NULL; | |
553 | ||
554 | assert(p->n_ref > 0); | |
555 | p->n_ref++; | |
556 | ||
557 | return p; | |
558 | } | |
559 | ||
560 | SocketPeer *socket_peer_unref(SocketPeer *p) { | |
561 | if (!p) | |
562 | return NULL; | |
563 | ||
564 | assert(p->n_ref > 0); | |
565 | ||
566 | p->n_ref--; | |
567 | ||
568 | if (p->n_ref > 0) | |
569 | return NULL; | |
570 | ||
571 | if (p->socket) | |
572 | set_remove(p->socket->peers_by_address, p); | |
573 | ||
574 | return mfree(p); | |
575 | } | |
576 | ||
3ebcd323 | 577 | int socket_acquire_peer(Socket *s, int fd, SocketPeer **p) { |
166cf510 ZJS |
578 | _cleanup_(socket_peer_unrefp) SocketPeer *remote = NULL; |
579 | SocketPeer sa = {}, *i; | |
580 | socklen_t salen = sizeof(sa.peer); | |
581 | int r; | |
582 | ||
583 | assert(fd >= 0); | |
584 | assert(s); | |
585 | ||
586 | r = getpeername(fd, &sa.peer.sa, &salen); | |
587 | if (r < 0) | |
588 | return log_error_errno(errno, "getpeername failed: %m"); | |
589 | ||
359a5bcf | 590 | if (!IN_SET(sa.peer.sa.sa_family, AF_INET, AF_INET6, AF_VSOCK)) { |
166cf510 ZJS |
591 | *p = NULL; |
592 | return 0; | |
593 | } | |
594 | ||
595 | i = set_get(s->peers_by_address, &sa); | |
596 | if (i) { | |
597 | *p = socket_peer_ref(i); | |
598 | return 1; | |
599 | } | |
600 | ||
601 | remote = socket_peer_new(); | |
602 | if (!remote) | |
603 | return log_oom(); | |
604 | ||
605 | remote->peer = sa.peer; | |
41733ae1 | 606 | remote->peer_salen = salen; |
166cf510 ZJS |
607 | |
608 | r = set_put(s->peers_by_address, remote); | |
609 | if (r < 0) | |
610 | return r; | |
611 | ||
612 | remote->socket = s; | |
613 | ||
1cc6c93a | 614 | *p = TAKE_PTR(remote); |
166cf510 ZJS |
615 | |
616 | return 1; | |
617 | } | |
618 | ||
44a6b1b6 | 619 | _const_ static const char* listen_lookup(int family, int type) { |
7a22745a LP |
620 | |
621 | if (family == AF_NETLINK) | |
622 | return "ListenNetlink"; | |
542563ba LP |
623 | |
624 | if (type == SOCK_STREAM) | |
625 | return "ListenStream"; | |
626 | else if (type == SOCK_DGRAM) | |
627 | return "ListenDatagram"; | |
628 | else if (type == SOCK_SEQPACKET) | |
629 | return "ListenSequentialPacket"; | |
630 | ||
034c6ed7 | 631 | assert_not_reached("Unknown socket type"); |
542563ba LP |
632 | return NULL; |
633 | } | |
634 | ||
87f0e418 | 635 | static void socket_dump(Unit *u, FILE *f, const char *prefix) { |
209e9dcd | 636 | char time_string[FORMAT_TIMESPAN_MAX]; |
5cb5a6ff | 637 | SocketExecCommand c; |
87f0e418 | 638 | Socket *s = SOCKET(u); |
542563ba | 639 | SocketPort *p; |
827d9bf2 | 640 | const char *prefix2, *str; |
5cb5a6ff LP |
641 | |
642 | assert(s); | |
fa068367 | 643 | assert(f); |
5cb5a6ff | 644 | |
4c940960 | 645 | prefix = strempty(prefix); |
63c372cb | 646 | prefix2 = strjoina(prefix, "\t"); |
c43d20a0 | 647 | |
5cb5a6ff LP |
648 | fprintf(f, |
649 | "%sSocket State: %s\n" | |
81a5c6d0 | 650 | "%sResult: %s\n" |
542563ba | 651 | "%sBindIPv6Only: %s\n" |
b5a0699f LP |
652 | "%sBacklog: %u\n" |
653 | "%sSocketMode: %04o\n" | |
4fd5948e LP |
654 | "%sDirectoryMode: %04o\n" |
655 | "%sKeepAlive: %s\n" | |
4427c3f4 | 656 | "%sNoDelay: %s\n" |
cebf8b20 | 657 | "%sFreeBind: %s\n" |
6b6d2dee | 658 | "%sTransparent: %s\n" |
ec6370a2 | 659 | "%sBroadcast: %s\n" |
ede3deb4 | 660 | "%sPassCredentials: %s\n" |
54ecda32 | 661 | "%sPassSecurity: %s\n" |
bd1fe7c7 | 662 | "%sTCPCongestion: %s\n" |
16115b0a | 663 | "%sRemoveOnStop: %s\n" |
55301ec0 | 664 | "%sWritable: %s\n" |
827d9bf2 | 665 | "%sFileDescriptorName: %s\n" |
16115b0a | 666 | "%sSELinuxContextFromNet: %s\n", |
a16e1123 | 667 | prefix, socket_state_to_string(s->state), |
81a5c6d0 | 668 | prefix, socket_result_to_string(s->result), |
c0120d99 | 669 | prefix, socket_address_bind_ipv6_only_to_string(s->bind_ipv6_only), |
b5a0699f LP |
670 | prefix, s->backlog, |
671 | prefix, s->socket_mode, | |
4fd5948e LP |
672 | prefix, s->directory_mode, |
673 | prefix, yes_no(s->keep_alive), | |
4427c3f4 | 674 | prefix, yes_no(s->no_delay), |
cebf8b20 | 675 | prefix, yes_no(s->free_bind), |
6b6d2dee | 676 | prefix, yes_no(s->transparent), |
ec6370a2 | 677 | prefix, yes_no(s->broadcast), |
d68af586 | 678 | prefix, yes_no(s->pass_cred), |
54ecda32 | 679 | prefix, yes_no(s->pass_sec), |
bd1fe7c7 | 680 | prefix, strna(s->tcp_congestion), |
16115b0a | 681 | prefix, yes_no(s->remove_on_stop), |
55301ec0 | 682 | prefix, yes_no(s->writable), |
8dd4c05b | 683 | prefix, socket_fdname(s), |
16115b0a | 684 | prefix, yes_no(s->selinux_context_from_net)); |
542563ba | 685 | |
70123e68 LP |
686 | if (s->control_pid > 0) |
687 | fprintf(f, | |
de0671ee ZJS |
688 | "%sControl PID: "PID_FMT"\n", |
689 | prefix, s->control_pid); | |
70123e68 | 690 | |
acbb0225 LP |
691 | if (s->bind_to_device) |
692 | fprintf(f, | |
693 | "%sBindToDevice: %s\n", | |
694 | prefix, s->bind_to_device); | |
695 | ||
4f2d528d LP |
696 | if (s->accept) |
697 | fprintf(f, | |
6cf6bbc2 LP |
698 | "%sAccepted: %u\n" |
699 | "%sNConnections: %u\n" | |
827d9bf2 YW |
700 | "%sMaxConnections: %u\n" |
701 | "%sMaxConnectionsPerSource: %u\n", | |
6cf6bbc2 LP |
702 | prefix, s->n_accepted, |
703 | prefix, s->n_connections, | |
827d9bf2 YW |
704 | prefix, s->max_connections, |
705 | prefix, s->max_connections_per_source); | |
4f2d528d | 706 | |
4fd5948e LP |
707 | if (s->priority >= 0) |
708 | fprintf(f, | |
709 | "%sPriority: %i\n", | |
710 | prefix, s->priority); | |
711 | ||
712 | if (s->receive_buffer > 0) | |
713 | fprintf(f, | |
714 | "%sReceiveBuffer: %zu\n", | |
715 | prefix, s->receive_buffer); | |
716 | ||
717 | if (s->send_buffer > 0) | |
718 | fprintf(f, | |
719 | "%sSendBuffer: %zu\n", | |
720 | prefix, s->send_buffer); | |
721 | ||
722 | if (s->ip_tos >= 0) | |
723 | fprintf(f, | |
724 | "%sIPTOS: %i\n", | |
725 | prefix, s->ip_tos); | |
726 | ||
727 | if (s->ip_ttl >= 0) | |
728 | fprintf(f, | |
729 | "%sIPTTL: %i\n", | |
730 | prefix, s->ip_ttl); | |
731 | ||
732 | if (s->pipe_size > 0) | |
733 | fprintf(f, | |
734 | "%sPipeSize: %zu\n", | |
735 | prefix, s->pipe_size); | |
736 | ||
737 | if (s->mark >= 0) | |
738 | fprintf(f, | |
739 | "%sMark: %i\n", | |
740 | prefix, s->mark); | |
741 | ||
916abb21 LP |
742 | if (s->mq_maxmsg > 0) |
743 | fprintf(f, | |
744 | "%sMessageQueueMaxMessages: %li\n", | |
745 | prefix, s->mq_maxmsg); | |
746 | ||
747 | if (s->mq_msgsize > 0) | |
748 | fprintf(f, | |
749 | "%sMessageQueueMessageSize: %li\n", | |
750 | prefix, s->mq_msgsize); | |
751 | ||
718db961 | 752 | if (s->reuse_port) |
f7db7a69 SL |
753 | fprintf(f, |
754 | "%sReusePort: %s\n", | |
718db961 | 755 | prefix, yes_no(s->reuse_port)); |
f7db7a69 | 756 | |
0eb59ccf AK |
757 | if (s->smack) |
758 | fprintf(f, | |
759 | "%sSmackLabel: %s\n", | |
760 | prefix, s->smack); | |
761 | ||
762 | if (s->smack_ip_in) | |
763 | fprintf(f, | |
764 | "%sSmackLabelIPIn: %s\n", | |
765 | prefix, s->smack_ip_in); | |
766 | ||
767 | if (s->smack_ip_out) | |
768 | fprintf(f, | |
769 | "%sSmackLabelIPOut: %s\n", | |
770 | prefix, s->smack_ip_out); | |
771 | ||
3900e5fd LP |
772 | if (!isempty(s->user) || !isempty(s->group)) |
773 | fprintf(f, | |
d2a50e3b LP |
774 | "%sSocketUser: %s\n" |
775 | "%sSocketGroup: %s\n", | |
3900e5fd LP |
776 | prefix, strna(s->user), |
777 | prefix, strna(s->group)); | |
778 | ||
3cd761e4 | 779 | if (s->keep_alive_time > 0) |
209e9dcd | 780 | fprintf(f, |
3cd761e4 LP |
781 | "%sKeepAliveTimeSec: %s\n", |
782 | prefix, format_timespan(time_string, FORMAT_TIMESPAN_MAX, s->keep_alive_time, USEC_PER_SEC)); | |
209e9dcd | 783 | |
7be9df7d | 784 | if (s->keep_alive_interval > 0) |
209e9dcd | 785 | fprintf(f, |
3cd761e4 LP |
786 | "%sKeepAliveIntervalSec: %s\n", |
787 | prefix, format_timespan(time_string, FORMAT_TIMESPAN_MAX, s->keep_alive_interval, USEC_PER_SEC)); | |
209e9dcd | 788 | |
7be9df7d | 789 | if (s->keep_alive_cnt > 0) |
209e9dcd SS |
790 | fprintf(f, |
791 | "%sKeepAliveProbes: %u\n", | |
792 | prefix, s->keep_alive_cnt); | |
793 | ||
7be9df7d | 794 | if (s->defer_accept > 0) |
cc567c9b | 795 | fprintf(f, |
3cd761e4 LP |
796 | "%sDeferAcceptSec: %s\n", |
797 | prefix, format_timespan(time_string, FORMAT_TIMESPAN_MAX, s->defer_accept, USEC_PER_SEC)); | |
cc567c9b | 798 | |
034c6ed7 | 799 | LIST_FOREACH(port, p, s->ports) { |
5cb5a6ff | 800 | |
7be9df7d YW |
801 | switch (p->type) { |
802 | case SOCKET_SOCKET: { | |
803 | _cleanup_free_ char *k = NULL; | |
542563ba LP |
804 | const char *t; |
805 | int r; | |
542563ba | 806 | |
e53fc357 LP |
807 | r = socket_address_print(&p->address, &k); |
808 | if (r < 0) | |
542563ba LP |
809 | t = strerror(-r); |
810 | else | |
811 | t = k; | |
812 | ||
7a22745a | 813 | fprintf(f, "%s%s: %s\n", prefix, listen_lookup(socket_address_family(&p->address), p->address.type), t); |
7be9df7d YW |
814 | break; |
815 | } | |
816 | case SOCKET_SPECIAL: | |
b0a3f2bc | 817 | fprintf(f, "%sListenSpecial: %s\n", prefix, p->path); |
7be9df7d YW |
818 | break; |
819 | case SOCKET_USB_FUNCTION: | |
60252446 | 820 | fprintf(f, "%sListenUSBFunction: %s\n", prefix, p->path); |
7be9df7d YW |
821 | break; |
822 | case SOCKET_MQUEUE: | |
916abb21 | 823 | fprintf(f, "%sListenMessageQueue: %s\n", prefix, p->path); |
7be9df7d YW |
824 | break; |
825 | default: | |
542563ba | 826 | fprintf(f, "%sListenFIFO: %s\n", prefix, p->path); |
7be9df7d | 827 | } |
542563ba | 828 | } |
5cb5a6ff | 829 | |
1745fa70 EV |
830 | fprintf(f, |
831 | "%sTriggerLimitIntervalSec: %s\n" | |
832 | "%sTriggerLimitBurst: %u\n", | |
833 | prefix, format_timespan(time_string, FORMAT_TIMESPAN_MAX, s->trigger_limit.interval, USEC_PER_SEC), | |
834 | prefix, s->trigger_limit.burst); | |
835 | ||
827d9bf2 YW |
836 | str = socket_protocol_to_name(s->socket_protocol); |
837 | if (str) | |
838 | fprintf(f, "%sSocketProtocol: %s\n", prefix, str); | |
839 | ||
840 | if (!strv_isempty(s->symlinks)) { | |
841 | char **q; | |
842 | ||
843 | fprintf(f, "%sSymlinks:", prefix); | |
844 | STRV_FOREACH(q, s->symlinks) | |
845 | fprintf(f, " %s", *q); | |
846 | ||
847 | fprintf(f, "\n"); | |
848 | } | |
849 | ||
850 | fprintf(f, | |
851 | "%sTimeoutSec: %s\n", | |
852 | prefix, format_timespan(time_string, FORMAT_TIMESPAN_MAX, s->timeout_usec, USEC_PER_SEC)); | |
853 | ||
5cb5a6ff | 854 | exec_context_dump(&s->exec_context, f, prefix); |
4819ff03 | 855 | kill_context_dump(&s->kill_context, f, prefix); |
5cb5a6ff | 856 | |
e537352b | 857 | for (c = 0; c < _SOCKET_EXEC_COMMAND_MAX; c++) { |
c43d20a0 LP |
858 | if (!s->exec_command[c]) |
859 | continue; | |
5cb5a6ff | 860 | |
40d50879 | 861 | fprintf(f, "%s-> %s:\n", |
a16e1123 | 862 | prefix, socket_exec_command_to_string(c)); |
c43d20a0 LP |
863 | |
864 | exec_command_dump_list(s->exec_command[c], f, prefix2); | |
5cb5a6ff | 865 | } |
18f573aa LP |
866 | |
867 | cgroup_context_dump(&s->cgroup_context, f, prefix); | |
5cb5a6ff LP |
868 | } |
869 | ||
4f2d528d LP |
870 | static int instance_from_socket(int fd, unsigned nr, char **instance) { |
871 | socklen_t l; | |
872 | char *r; | |
9d16d0c7 | 873 | union sockaddr_union local, remote; |
4f2d528d LP |
874 | |
875 | assert(fd >= 0); | |
876 | assert(instance); | |
877 | ||
878 | l = sizeof(local); | |
879 | if (getsockname(fd, &local.sa, &l) < 0) | |
880 | return -errno; | |
881 | ||
882 | l = sizeof(remote); | |
883 | if (getpeername(fd, &remote.sa, &l) < 0) | |
884 | return -errno; | |
885 | ||
886 | switch (local.sa.sa_family) { | |
887 | ||
888 | case AF_INET: { | |
889 | uint32_t | |
8e38570e LP |
890 | a = be32toh(local.in.sin_addr.s_addr), |
891 | b = be32toh(remote.in.sin_addr.s_addr); | |
4f2d528d LP |
892 | |
893 | if (asprintf(&r, | |
77b088c2 LP |
894 | "%u-%u.%u.%u.%u:%u-%u.%u.%u.%u:%u", |
895 | nr, | |
4f2d528d | 896 | a >> 24, (a >> 16) & 0xFF, (a >> 8) & 0xFF, a & 0xFF, |
8e38570e | 897 | be16toh(local.in.sin_port), |
4f2d528d | 898 | b >> 24, (b >> 16) & 0xFF, (b >> 8) & 0xFF, b & 0xFF, |
8e38570e | 899 | be16toh(remote.in.sin_port)) < 0) |
4f2d528d LP |
900 | return -ENOMEM; |
901 | ||
902 | break; | |
903 | } | |
904 | ||
905 | case AF_INET6: { | |
c65a0b14 | 906 | static const unsigned char ipv4_prefix[] = { |
2b061f5a LP |
907 | 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0xFF, 0xFF |
908 | }; | |
909 | ||
910 | if (memcmp(&local.in6.sin6_addr, ipv4_prefix, sizeof(ipv4_prefix)) == 0 && | |
911 | memcmp(&remote.in6.sin6_addr, ipv4_prefix, sizeof(ipv4_prefix)) == 0) { | |
912 | const uint8_t | |
913 | *a = local.in6.sin6_addr.s6_addr+12, | |
914 | *b = remote.in6.sin6_addr.s6_addr+12; | |
915 | ||
916 | if (asprintf(&r, | |
77b088c2 LP |
917 | "%u-%u.%u.%u.%u:%u-%u.%u.%u.%u:%u", |
918 | nr, | |
2b061f5a | 919 | a[0], a[1], a[2], a[3], |
8e38570e | 920 | be16toh(local.in6.sin6_port), |
2b061f5a | 921 | b[0], b[1], b[2], b[3], |
8e38570e | 922 | be16toh(remote.in6.sin6_port)) < 0) |
2b061f5a LP |
923 | return -ENOMEM; |
924 | } else { | |
925 | char a[INET6_ADDRSTRLEN], b[INET6_ADDRSTRLEN]; | |
926 | ||
927 | if (asprintf(&r, | |
77b088c2 LP |
928 | "%u-%s:%u-%s:%u", |
929 | nr, | |
2b061f5a | 930 | inet_ntop(AF_INET6, &local.in6.sin6_addr, a, sizeof(a)), |
8e38570e | 931 | be16toh(local.in6.sin6_port), |
2b061f5a | 932 | inet_ntop(AF_INET6, &remote.in6.sin6_addr, b, sizeof(b)), |
8e38570e | 933 | be16toh(remote.in6.sin6_port)) < 0) |
2b061f5a LP |
934 | return -ENOMEM; |
935 | } | |
4f2d528d LP |
936 | |
937 | break; | |
938 | } | |
939 | ||
940 | case AF_UNIX: { | |
941 | struct ucred ucred; | |
eff05270 | 942 | int k; |
4f2d528d | 943 | |
eff05270 | 944 | k = getpeercred(fd, &ucred); |
d38f6e34 ZJS |
945 | if (k >= 0) { |
946 | if (asprintf(&r, | |
947 | "%u-"PID_FMT"-"UID_FMT, | |
948 | nr, ucred.pid, ucred.uid) < 0) | |
949 | return -ENOMEM; | |
950 | } else if (k == -ENODATA) { | |
951 | /* This handles the case where somebody is | |
952 | * connecting from another pid/uid namespace | |
953 | * (e.g. from outside of our container). */ | |
954 | if (asprintf(&r, | |
955 | "%u-unknown", | |
956 | nr) < 0) | |
957 | return -ENOMEM; | |
958 | } else | |
eff05270 | 959 | return k; |
2f20a8eb | 960 | |
2f20a8eb | 961 | break; |
4f2d528d LP |
962 | } |
963 | ||
359a5bcf SH |
964 | case AF_VSOCK: |
965 | if (asprintf(&r, | |
966 | "%u-%u:%u-%u:%u", | |
967 | nr, | |
968 | local.vm.svm_cid, local.vm.svm_port, | |
969 | remote.vm.svm_cid, remote.vm.svm_port) < 0) | |
970 | return -ENOMEM; | |
971 | ||
972 | break; | |
973 | ||
4f2d528d LP |
974 | default: |
975 | assert_not_reached("Unhandled socket type."); | |
976 | } | |
977 | ||
978 | *instance = r; | |
979 | return 0; | |
980 | } | |
981 | ||
034c6ed7 | 982 | static void socket_close_fds(Socket *s) { |
83c60c9f | 983 | SocketPort *p; |
811ba7a0 | 984 | char **i; |
83c60c9f LP |
985 | |
986 | assert(s); | |
987 | ||
034c6ed7 | 988 | LIST_FOREACH(port, p, s->ports) { |
18e854f8 | 989 | bool was_open; |
718db961 | 990 | |
18e854f8 | 991 | was_open = p->fd >= 0; |
83c60c9f | 992 | |
18e854f8 | 993 | p->event_source = sd_event_source_unref(p->event_source); |
03e334a1 | 994 | p->fd = safe_close(p->fd); |
15087cdb | 995 | socket_cleanup_fd_list(p); |
a16e1123 | 996 | |
18e854f8 LP |
997 | /* One little note: we should normally not delete any sockets in the file system here! After all some |
998 | * other process we spawned might still have a reference of this fd and wants to continue to use | |
999 | * it. Therefore we normally delete sockets in the file system before we create a new one, not after we | |
1000 | * stopped using one! That all said, if the user explicitly requested this, we'll delete them here | |
1001 | * anyway, but only then. */ | |
bd1fe7c7 | 1002 | |
18e854f8 LP |
1003 | if (!was_open || !s->remove_on_stop) |
1004 | continue; | |
1005 | ||
1006 | switch (p->type) { | |
bd1fe7c7 | 1007 | |
18e854f8 LP |
1008 | case SOCKET_FIFO: |
1009 | (void) unlink(p->path); | |
1010 | break; | |
bd1fe7c7 | 1011 | |
18e854f8 LP |
1012 | case SOCKET_MQUEUE: |
1013 | (void) mq_unlink(p->path); | |
1014 | break; | |
bd1fe7c7 | 1015 | |
18e854f8 LP |
1016 | case SOCKET_SOCKET: |
1017 | (void) socket_address_unlink(&p->address); | |
1018 | break; | |
bd1fe7c7 | 1019 | |
18e854f8 LP |
1020 | default: |
1021 | break; | |
bd1fe7c7 | 1022 | } |
83c60c9f | 1023 | } |
811ba7a0 LP |
1024 | |
1025 | if (s->remove_on_stop) | |
1026 | STRV_FOREACH(i, s->symlinks) | |
18e854f8 | 1027 | (void) unlink(*i); |
83c60c9f LP |
1028 | } |
1029 | ||
4fd5948e | 1030 | static void socket_apply_socket_options(Socket *s, int fd) { |
d53e386d LP |
1031 | int r; |
1032 | ||
4fd5948e LP |
1033 | assert(s); |
1034 | assert(fd >= 0); | |
1035 | ||
1036 | if (s->keep_alive) { | |
7be9df7d YW |
1037 | int one = 1; |
1038 | if (setsockopt(fd, SOL_SOCKET, SO_KEEPALIVE, &one, sizeof(one)) < 0) | |
f2341e0a | 1039 | log_unit_warning_errno(UNIT(s), errno, "SO_KEEPALIVE failed: %m"); |
4fd5948e LP |
1040 | } |
1041 | ||
7be9df7d | 1042 | if (s->keep_alive_time > 0) { |
209e9dcd SS |
1043 | int value = s->keep_alive_time / USEC_PER_SEC; |
1044 | if (setsockopt(fd, SOL_TCP, TCP_KEEPIDLE, &value, sizeof(value)) < 0) | |
f2341e0a | 1045 | log_unit_warning_errno(UNIT(s), errno, "TCP_KEEPIDLE failed: %m"); |
209e9dcd SS |
1046 | } |
1047 | ||
7be9df7d | 1048 | if (s->keep_alive_interval > 0) { |
920b52e4 | 1049 | int value = s->keep_alive_interval / USEC_PER_SEC; |
209e9dcd | 1050 | if (setsockopt(fd, SOL_TCP, TCP_KEEPINTVL, &value, sizeof(value)) < 0) |
f2341e0a | 1051 | log_unit_warning_errno(UNIT(s), errno, "TCP_KEEPINTVL failed: %m"); |
209e9dcd SS |
1052 | } |
1053 | ||
7be9df7d | 1054 | if (s->keep_alive_cnt > 0) { |
209e9dcd | 1055 | int value = s->keep_alive_cnt; |
172cfe87 | 1056 | if (setsockopt(fd, SOL_TCP, TCP_KEEPCNT, &value, sizeof(value)) < 0) |
f2341e0a | 1057 | log_unit_warning_errno(UNIT(s), errno, "TCP_KEEPCNT failed: %m"); |
209e9dcd SS |
1058 | } |
1059 | ||
7be9df7d | 1060 | if (s->defer_accept > 0) { |
cc567c9b SS |
1061 | int value = s->defer_accept / USEC_PER_SEC; |
1062 | if (setsockopt(fd, SOL_TCP, TCP_DEFER_ACCEPT, &value, sizeof(value)) < 0) | |
f2341e0a | 1063 | log_unit_warning_errno(UNIT(s), errno, "TCP_DEFER_ACCEPT failed: %m"); |
cc567c9b SS |
1064 | } |
1065 | ||
4427c3f4 | 1066 | if (s->no_delay) { |
7be9df7d | 1067 | int one = 1; |
62bc4efc SS |
1068 | |
1069 | if (s->socket_protocol == IPPROTO_SCTP) { | |
7be9df7d | 1070 | if (setsockopt(fd, SOL_SCTP, SCTP_NODELAY, &one, sizeof(one)) < 0) |
62bc4efc SS |
1071 | log_unit_warning_errno(UNIT(s), errno, "SCTP_NODELAY failed: %m"); |
1072 | } else { | |
7be9df7d | 1073 | if (setsockopt(fd, SOL_TCP, TCP_NODELAY, &one, sizeof(one)) < 0) |
62bc4efc SS |
1074 | log_unit_warning_errno(UNIT(s), errno, "TCP_NODELAY failed: %m"); |
1075 | } | |
4427c3f4 SS |
1076 | } |
1077 | ||
ec6370a2 LP |
1078 | if (s->broadcast) { |
1079 | int one = 1; | |
1080 | if (setsockopt(fd, SOL_SOCKET, SO_BROADCAST, &one, sizeof(one)) < 0) | |
f2341e0a | 1081 | log_unit_warning_errno(UNIT(s), errno, "SO_BROADCAST failed: %m"); |
ec6370a2 LP |
1082 | } |
1083 | ||
d68af586 MS |
1084 | if (s->pass_cred) { |
1085 | int one = 1; | |
1086 | if (setsockopt(fd, SOL_SOCKET, SO_PASSCRED, &one, sizeof(one)) < 0) | |
f2341e0a | 1087 | log_unit_warning_errno(UNIT(s), errno, "SO_PASSCRED failed: %m"); |
d68af586 MS |
1088 | } |
1089 | ||
54ecda32 LP |
1090 | if (s->pass_sec) { |
1091 | int one = 1; | |
1092 | if (setsockopt(fd, SOL_SOCKET, SO_PASSSEC, &one, sizeof(one)) < 0) | |
f2341e0a | 1093 | log_unit_warning_errno(UNIT(s), errno, "SO_PASSSEC failed: %m"); |
54ecda32 LP |
1094 | } |
1095 | ||
4fd5948e LP |
1096 | if (s->priority >= 0) |
1097 | if (setsockopt(fd, SOL_SOCKET, SO_PRIORITY, &s->priority, sizeof(s->priority)) < 0) | |
f2341e0a | 1098 | log_unit_warning_errno(UNIT(s), errno, "SO_PRIORITY failed: %m"); |
4fd5948e LP |
1099 | |
1100 | if (s->receive_buffer > 0) { | |
1101 | int value = (int) s->receive_buffer; | |
7d9eaa84 LP |
1102 | |
1103 | /* We first try with SO_RCVBUFFORCE, in case we have the perms for that */ | |
b8cef44e | 1104 | if (setsockopt(fd, SOL_SOCKET, SO_RCVBUFFORCE, &value, sizeof(value)) < 0) |
7d9eaa84 | 1105 | if (setsockopt(fd, SOL_SOCKET, SO_RCVBUF, &value, sizeof(value)) < 0) |
f2341e0a | 1106 | log_unit_warning_errno(UNIT(s), errno, "SO_RCVBUF failed: %m"); |
4fd5948e LP |
1107 | } |
1108 | ||
1109 | if (s->send_buffer > 0) { | |
1110 | int value = (int) s->send_buffer; | |
b8cef44e | 1111 | if (setsockopt(fd, SOL_SOCKET, SO_SNDBUFFORCE, &value, sizeof(value)) < 0) |
7d9eaa84 | 1112 | if (setsockopt(fd, SOL_SOCKET, SO_SNDBUF, &value, sizeof(value)) < 0) |
f2341e0a | 1113 | log_unit_warning_errno(UNIT(s), errno, "SO_SNDBUF failed: %m"); |
4fd5948e LP |
1114 | } |
1115 | ||
1116 | if (s->mark >= 0) | |
1117 | if (setsockopt(fd, SOL_SOCKET, SO_MARK, &s->mark, sizeof(s->mark)) < 0) | |
f2341e0a | 1118 | log_unit_warning_errno(UNIT(s), errno, "SO_MARK failed: %m"); |
4fd5948e LP |
1119 | |
1120 | if (s->ip_tos >= 0) | |
1121 | if (setsockopt(fd, IPPROTO_IP, IP_TOS, &s->ip_tos, sizeof(s->ip_tos)) < 0) | |
f2341e0a | 1122 | log_unit_warning_errno(UNIT(s), errno, "IP_TOS failed: %m"); |
4fd5948e | 1123 | |
46925ac5 | 1124 | if (s->ip_ttl >= 0) { |
d53e386d | 1125 | int x; |
46925ac5 LP |
1126 | |
1127 | r = setsockopt(fd, IPPROTO_IP, IP_TTL, &s->ip_ttl, sizeof(s->ip_ttl)); | |
5bfcc1c6 FF |
1128 | |
1129 | if (socket_ipv6_is_supported()) | |
1130 | x = setsockopt(fd, IPPROTO_IPV6, IPV6_UNICAST_HOPS, &s->ip_ttl, sizeof(s->ip_ttl)); | |
1131 | else { | |
1132 | x = -1; | |
1133 | errno = EAFNOSUPPORT; | |
1134 | } | |
46925ac5 LP |
1135 | |
1136 | if (r < 0 && x < 0) | |
f2341e0a | 1137 | log_unit_warning_errno(UNIT(s), errno, "IP_TTL/IPV6_UNICAST_HOPS failed: %m"); |
46925ac5 | 1138 | } |
cebf8b20 TT |
1139 | |
1140 | if (s->tcp_congestion) | |
1141 | if (setsockopt(fd, SOL_TCP, TCP_CONGESTION, s->tcp_congestion, strlen(s->tcp_congestion)+1) < 0) | |
f2341e0a | 1142 | log_unit_warning_errno(UNIT(s), errno, "TCP_CONGESTION failed: %m"); |
0eb59ccf | 1143 | |
d53e386d | 1144 | if (s->smack_ip_in) { |
5ab58c20 | 1145 | r = mac_smack_apply_fd(fd, SMACK_ATTR_IPIN, s->smack_ip_in); |
d53e386d | 1146 | if (r < 0) |
f2341e0a | 1147 | log_unit_error_errno(UNIT(s), r, "mac_smack_apply_ip_in_fd: %m"); |
d53e386d | 1148 | } |
9a4e038c | 1149 | |
d53e386d | 1150 | if (s->smack_ip_out) { |
5ab58c20 | 1151 | r = mac_smack_apply_fd(fd, SMACK_ATTR_IPOUT, s->smack_ip_out); |
d53e386d | 1152 | if (r < 0) |
f2341e0a | 1153 | log_unit_error_errno(UNIT(s), r, "mac_smack_apply_ip_out_fd: %m"); |
d53e386d | 1154 | } |
4fd5948e LP |
1155 | } |
1156 | ||
b15bdda8 | 1157 | static void socket_apply_fifo_options(Socket *s, int fd) { |
d53e386d LP |
1158 | int r; |
1159 | ||
4fd5948e LP |
1160 | assert(s); |
1161 | assert(fd >= 0); | |
1162 | ||
1163 | if (s->pipe_size > 0) | |
1164 | if (fcntl(fd, F_SETPIPE_SZ, s->pipe_size) < 0) | |
ed460b07 | 1165 | log_unit_warning_errno(UNIT(s), errno, "Setting pipe size failed, ignoring: %m"); |
0eb59ccf | 1166 | |
d53e386d | 1167 | if (s->smack) { |
5ab58c20 | 1168 | r = mac_smack_apply_fd(fd, SMACK_ATTR_ACCESS, s->smack); |
d53e386d | 1169 | if (r < 0) |
ed460b07 | 1170 | log_unit_error_errno(UNIT(s), r, "SMACK relabelling failed, ignoring: %m"); |
d53e386d | 1171 | } |
4fd5948e LP |
1172 | } |
1173 | ||
b15bdda8 LP |
1174 | static int fifo_address_create( |
1175 | const char *path, | |
1176 | mode_t directory_mode, | |
e8da24a6 | 1177 | mode_t socket_mode) { |
b15bdda8 | 1178 | |
e8da24a6 | 1179 | _cleanup_close_ int fd = -1; |
b15bdda8 | 1180 | mode_t old_mask; |
e8da24a6 LP |
1181 | struct stat st; |
1182 | int r; | |
b15bdda8 LP |
1183 | |
1184 | assert(path); | |
b15bdda8 | 1185 | |
1af87ab7 | 1186 | (void) mkdir_parents_label(path, directory_mode); |
b15bdda8 | 1187 | |
ecabcf8b | 1188 | r = mac_selinux_create_file_prepare(path, S_IFIFO); |
e9a5ef7c | 1189 | if (r < 0) |
e8da24a6 | 1190 | return r; |
b15bdda8 LP |
1191 | |
1192 | /* Enforce the right access mode for the fifo */ | |
7be9df7d | 1193 | old_mask = umask(~socket_mode); |
b15bdda8 LP |
1194 | |
1195 | /* Include the original umask in our mask */ | |
e8da24a6 | 1196 | (void) umask(~socket_mode | old_mask); |
b15bdda8 LP |
1197 | |
1198 | r = mkfifo(path, socket_mode); | |
e8da24a6 | 1199 | (void) umask(old_mask); |
b15bdda8 | 1200 | |
94bc2731 | 1201 | if (r < 0 && errno != EEXIST) { |
b15bdda8 LP |
1202 | r = -errno; |
1203 | goto fail; | |
1204 | } | |
1205 | ||
e8da24a6 | 1206 | fd = open(path, O_RDWR | O_CLOEXEC | O_NOCTTY | O_NONBLOCK | O_NOFOLLOW); |
3cc2aff1 | 1207 | if (fd < 0) { |
b15bdda8 LP |
1208 | r = -errno; |
1209 | goto fail; | |
1210 | } | |
1211 | ||
ecabcf8b | 1212 | mac_selinux_create_file_clear(); |
7a58bfa4 | 1213 | |
b15bdda8 LP |
1214 | if (fstat(fd, &st) < 0) { |
1215 | r = -errno; | |
1216 | goto fail; | |
1217 | } | |
1218 | ||
1219 | if (!S_ISFIFO(st.st_mode) || | |
de0200fc | 1220 | (st.st_mode & 0777) != (socket_mode & ~old_mask) || |
e4f44e73 DR |
1221 | st.st_uid != getuid() || |
1222 | st.st_gid != getgid()) { | |
b15bdda8 LP |
1223 | r = -EEXIST; |
1224 | goto fail; | |
1225 | } | |
1226 | ||
c10d6bdb | 1227 | return TAKE_FD(fd); |
b15bdda8 LP |
1228 | |
1229 | fail: | |
ecabcf8b | 1230 | mac_selinux_create_file_clear(); |
b15bdda8 LP |
1231 | return r; |
1232 | } | |
1233 | ||
55301ec0 | 1234 | static int special_address_create(const char *path, bool writable) { |
e8da24a6 | 1235 | _cleanup_close_ int fd = -1; |
b0a3f2bc LP |
1236 | struct stat st; |
1237 | ||
1238 | assert(path); | |
b0a3f2bc | 1239 | |
55301ec0 | 1240 | fd = open(path, (writable ? O_RDWR : O_RDONLY)|O_CLOEXEC|O_NOCTTY|O_NONBLOCK|O_NOFOLLOW); |
e8da24a6 LP |
1241 | if (fd < 0) |
1242 | return -errno; | |
b0a3f2bc | 1243 | |
e8da24a6 LP |
1244 | if (fstat(fd, &st) < 0) |
1245 | return -errno; | |
b0a3f2bc LP |
1246 | |
1247 | /* Check whether this is a /proc, /sys or /dev file or char device */ | |
e8da24a6 LP |
1248 | if (!S_ISREG(st.st_mode) && !S_ISCHR(st.st_mode)) |
1249 | return -EEXIST; | |
b0a3f2bc | 1250 | |
c10d6bdb | 1251 | return TAKE_FD(fd); |
b0a3f2bc LP |
1252 | } |
1253 | ||
36078102 | 1254 | static int usbffs_address_create(const char *path) { |
60252446 PS |
1255 | _cleanup_close_ int fd = -1; |
1256 | struct stat st; | |
1257 | ||
1258 | assert(path); | |
60252446 PS |
1259 | |
1260 | fd = open(path, O_RDWR|O_CLOEXEC|O_NOCTTY|O_NONBLOCK|O_NOFOLLOW); | |
1261 | if (fd < 0) | |
1262 | return -errno; | |
1263 | ||
1264 | if (fstat(fd, &st) < 0) | |
1265 | return -errno; | |
1266 | ||
13e785f7 | 1267 | /* Check whether this is a regular file (ffs endpoint) */ |
60252446 PS |
1268 | if (!S_ISREG(st.st_mode)) |
1269 | return -EEXIST; | |
1270 | ||
c10d6bdb | 1271 | return TAKE_FD(fd); |
60252446 PS |
1272 | } |
1273 | ||
916abb21 LP |
1274 | static int mq_address_create( |
1275 | const char *path, | |
1276 | mode_t mq_mode, | |
1277 | long maxmsg, | |
e8da24a6 | 1278 | long msgsize) { |
916abb21 | 1279 | |
e8da24a6 | 1280 | _cleanup_close_ int fd = -1; |
916abb21 LP |
1281 | struct stat st; |
1282 | mode_t old_mask; | |
1283 | struct mq_attr _attr, *attr = NULL; | |
1284 | ||
1285 | assert(path); | |
916abb21 LP |
1286 | |
1287 | if (maxmsg > 0 && msgsize > 0) { | |
e8da24a6 LP |
1288 | _attr = (struct mq_attr) { |
1289 | .mq_flags = O_NONBLOCK, | |
1290 | .mq_maxmsg = maxmsg, | |
1291 | .mq_msgsize = msgsize, | |
1292 | }; | |
916abb21 LP |
1293 | attr = &_attr; |
1294 | } | |
1295 | ||
1296 | /* Enforce the right access mode for the mq */ | |
7be9df7d | 1297 | old_mask = umask(~mq_mode); |
916abb21 LP |
1298 | |
1299 | /* Include the original umask in our mask */ | |
e8da24a6 | 1300 | (void) umask(~mq_mode | old_mask); |
916abb21 | 1301 | fd = mq_open(path, O_RDONLY|O_CLOEXEC|O_NONBLOCK|O_CREAT, mq_mode, attr); |
e8da24a6 | 1302 | (void) umask(old_mask); |
916abb21 | 1303 | |
e8da24a6 LP |
1304 | if (fd < 0) |
1305 | return -errno; | |
916abb21 | 1306 | |
e8da24a6 LP |
1307 | if (fstat(fd, &st) < 0) |
1308 | return -errno; | |
916abb21 LP |
1309 | |
1310 | if ((st.st_mode & 0777) != (mq_mode & ~old_mask) || | |
1311 | st.st_uid != getuid() || | |
e8da24a6 LP |
1312 | st.st_gid != getgid()) |
1313 | return -EEXIST; | |
916abb21 | 1314 | |
c10d6bdb | 1315 | return TAKE_FD(fd); |
916abb21 LP |
1316 | } |
1317 | ||
811ba7a0 LP |
1318 | static int socket_symlink(Socket *s) { |
1319 | const char *p; | |
1320 | char **i; | |
95f7fbbf | 1321 | int r; |
811ba7a0 LP |
1322 | |
1323 | assert(s); | |
1324 | ||
1325 | p = socket_find_symlink_target(s); | |
1326 | if (!p) | |
1327 | return 0; | |
1328 | ||
95f7fbbf | 1329 | STRV_FOREACH(i, s->symlinks) { |
1af87ab7 LP |
1330 | (void) mkdir_parents_label(*i, s->directory_mode); |
1331 | ||
95f7fbbf | 1332 | r = symlink_idempotent(p, *i); |
22b20752 LP |
1333 | |
1334 | if (r == -EEXIST && s->remove_on_stop) { | |
1335 | /* If there's already something where we want to create the symlink, and the destructive | |
1336 | * RemoveOnStop= mode is set, then we might as well try to remove what already exists and try | |
1337 | * again. */ | |
1338 | ||
1339 | if (unlink(*i) >= 0) | |
1340 | r = symlink_idempotent(p, *i); | |
1341 | } | |
1342 | ||
95f7fbbf LP |
1343 | if (r < 0) |
1344 | log_unit_warning_errno(UNIT(s), r, "Failed to create symlink %s → %s, ignoring: %m", p, *i); | |
1345 | } | |
811ba7a0 LP |
1346 | |
1347 | return 0; | |
1348 | } | |
1349 | ||
36078102 | 1350 | static int usbffs_write_descs(int fd, Service *s) { |
6b7e5923 PS |
1351 | int r; |
1352 | ||
1353 | if (!s->usb_function_descriptors || !s->usb_function_strings) | |
1354 | return -EINVAL; | |
1355 | ||
1c876927 | 1356 | r = copy_file_fd(s->usb_function_descriptors, fd, 0); |
6b7e5923 | 1357 | if (r < 0) |
e8da24a6 | 1358 | return r; |
6b7e5923 | 1359 | |
1c876927 | 1360 | return copy_file_fd(s->usb_function_strings, fd, 0); |
6b7e5923 PS |
1361 | } |
1362 | ||
36078102 | 1363 | static int usbffs_select_ep(const struct dirent *d) { |
60252446 PS |
1364 | return d->d_name[0] != '.' && !streq(d->d_name, "ep0"); |
1365 | } | |
1366 | ||
36078102 | 1367 | static int usbffs_dispatch_eps(SocketPort *p) { |
60252446 | 1368 | _cleanup_free_ struct dirent **ent = NULL; |
da6053d0 LP |
1369 | size_t n, k, i; |
1370 | int r; | |
60252446 | 1371 | |
00bb64ec | 1372 | r = scandir(p->path, &ent, usbffs_select_ep, alphasort); |
60252446 PS |
1373 | if (r < 0) |
1374 | return -errno; | |
1375 | ||
da6053d0 | 1376 | n = (size_t) r; |
60252446 PS |
1377 | p->auxiliary_fds = new(int, n); |
1378 | if (!p->auxiliary_fds) | |
1379 | return -ENOMEM; | |
1380 | ||
1381 | p->n_auxiliary_fds = n; | |
1382 | ||
1383 | k = 0; | |
1384 | for (i = 0; i < n; ++i) { | |
1385 | _cleanup_free_ char *ep = NULL; | |
1386 | ||
00bb64ec | 1387 | ep = path_make_absolute(ent[i]->d_name, p->path); |
60252446 PS |
1388 | if (!ep) |
1389 | return -ENOMEM; | |
1390 | ||
858d36c1 | 1391 | path_simplify(ep, false); |
60252446 | 1392 | |
36078102 | 1393 | r = usbffs_address_create(ep); |
60252446 PS |
1394 | if (r < 0) |
1395 | goto fail; | |
1396 | ||
da6053d0 | 1397 | p->auxiliary_fds[k++] = r; |
60252446 PS |
1398 | free(ent[i]); |
1399 | } | |
1400 | ||
1401 | return r; | |
1402 | ||
1403 | fail: | |
e8da24a6 | 1404 | close_many(p->auxiliary_fds, k); |
60252446 PS |
1405 | p->auxiliary_fds = mfree(p->auxiliary_fds); |
1406 | p->n_auxiliary_fds = 0; | |
1407 | ||
1408 | return r; | |
1409 | } | |
1410 | ||
d24e561d | 1411 | static int socket_determine_selinux_label(Socket *s, char **ret) { |
416be1a0 | 1412 | Service *service; |
d24e561d | 1413 | ExecCommand *c; |
2ef044ea | 1414 | _cleanup_free_ char *path = NULL; |
d24e561d LP |
1415 | int r; |
1416 | ||
1417 | assert(s); | |
1418 | assert(ret); | |
1419 | ||
1420 | if (s->selinux_context_from_net) { | |
1421 | /* If this is requested, get label from the network label */ | |
1422 | ||
1423 | r = mac_selinux_get_our_label(ret); | |
1424 | if (r == -EOPNOTSUPP) | |
1425 | goto no_label; | |
1426 | ||
1427 | } else { | |
1428 | /* Otherwise, get it from the executable we are about to start */ | |
1429 | r = socket_instantiate_service(s); | |
1430 | if (r < 0) | |
1431 | return r; | |
1432 | ||
1433 | if (!UNIT_ISSET(s->service)) | |
1434 | goto no_label; | |
1435 | ||
416be1a0 FB |
1436 | service = SERVICE(UNIT_DEREF(s->service)); |
1437 | c = service->exec_command[SERVICE_EXEC_START]; | |
d24e561d LP |
1438 | if (!c) |
1439 | goto no_label; | |
1440 | ||
2ef044ea FB |
1441 | r = chase_symlinks(c->path, service->exec_context.root_directory, CHASE_PREFIX_ROOT, &path); |
1442 | if (r < 0) | |
1443 | goto no_label; | |
1444 | ||
416be1a0 | 1445 | r = mac_selinux_get_create_label_from_exe(path, ret); |
4c701096 | 1446 | if (IN_SET(r, -EPERM, -EOPNOTSUPP)) |
d24e561d LP |
1447 | goto no_label; |
1448 | } | |
1449 | ||
1450 | return r; | |
1451 | ||
1452 | no_label: | |
1453 | *ret = NULL; | |
1454 | return 0; | |
1455 | } | |
1456 | ||
a79279c7 LP |
1457 | static int socket_address_listen_do( |
1458 | Socket *s, | |
1459 | const SocketAddress *address, | |
1460 | const char *label) { | |
1461 | ||
1462 | assert(s); | |
1463 | assert(address); | |
1464 | ||
1465 | return socket_address_listen( | |
1466 | address, | |
1467 | SOCK_CLOEXEC|SOCK_NONBLOCK, | |
1468 | s->backlog, | |
1469 | s->bind_ipv6_only, | |
1470 | s->bind_to_device, | |
1471 | s->reuse_port, | |
1472 | s->free_bind, | |
1473 | s->transparent, | |
1474 | s->directory_mode, | |
1475 | s->socket_mode, | |
1476 | label); | |
1477 | } | |
1478 | ||
1479 | static int socket_address_listen_in_cgroup( | |
1480 | Socket *s, | |
1481 | const SocketAddress *address, | |
1482 | const char *label) { | |
1483 | ||
1484 | _cleanup_close_pair_ int pair[2] = { -1, -1 }; | |
1485 | int fd, r; | |
1486 | pid_t pid; | |
1487 | ||
1488 | assert(s); | |
1489 | assert(address); | |
1490 | ||
1491 | /* This is a wrapper around socket_address_listen(), that forks off a helper process inside the socket's cgroup | |
1492 | * in which the socket is actually created. This way we ensure the socket is actually properly attached to the | |
1493 | * unit's cgroup for the purpose of BPF filtering and such. */ | |
1494 | ||
1495 | if (!IN_SET(address->sockaddr.sa.sa_family, AF_INET, AF_INET6)) | |
1496 | goto shortcut; /* BPF filtering only applies to IPv4 + IPv6, shortcut things for other protocols */ | |
1497 | ||
1498 | r = bpf_firewall_supported(); | |
1499 | if (r < 0) | |
1500 | return r; | |
2ae7ee58 | 1501 | if (r == BPF_FIREWALL_UNSUPPORTED) /* If BPF firewalling isn't supported anyway — there's no point in this forking complexity */ |
a79279c7 LP |
1502 | goto shortcut; |
1503 | ||
1504 | if (socketpair(AF_UNIX, SOCK_SEQPACKET|SOCK_CLOEXEC, 0, pair) < 0) | |
1505 | return log_unit_error_errno(UNIT(s), errno, "Failed to create communication channel: %m"); | |
1506 | ||
4c253ed1 | 1507 | r = unit_fork_helper_process(UNIT(s), "(sd-listen)", &pid); |
a79279c7 LP |
1508 | if (r < 0) |
1509 | return log_unit_error_errno(UNIT(s), r, "Failed to fork off listener stub process: %m"); | |
1510 | if (r == 0) { | |
1511 | /* Child */ | |
1512 | ||
1513 | pair[0] = safe_close(pair[0]); | |
1514 | ||
1515 | fd = socket_address_listen_do(s, address, label); | |
1516 | if (fd < 0) { | |
1517 | log_unit_error_errno(UNIT(s), fd, "Failed to create listening socket: %m"); | |
1518 | _exit(EXIT_FAILURE); | |
1519 | } | |
1520 | ||
1521 | r = send_one_fd(pair[1], fd, 0); | |
1522 | if (r < 0) { | |
1523 | log_unit_error_errno(UNIT(s), r, "Failed to send listening socket to parent: %m"); | |
1524 | _exit(EXIT_FAILURE); | |
1525 | } | |
1526 | ||
1527 | _exit(EXIT_SUCCESS); | |
1528 | } | |
1529 | ||
1530 | pair[1] = safe_close(pair[1]); | |
1531 | fd = receive_one_fd(pair[0], 0); | |
1532 | ||
1533 | /* We synchronously wait for the helper, as it shouldn't be slow */ | |
d2e0ac3d | 1534 | r = wait_for_terminate_and_check("(sd-listen)", pid, WAIT_LOG_ABNORMAL); |
a79279c7 LP |
1535 | if (r < 0) { |
1536 | safe_close(fd); | |
1537 | return r; | |
1538 | } | |
1539 | ||
1540 | if (fd < 0) | |
1541 | return log_unit_error_errno(UNIT(s), fd, "Failed to receive listening socket: %m"); | |
1542 | ||
1543 | return fd; | |
1544 | ||
1545 | shortcut: | |
1546 | fd = socket_address_listen_do(s, address, label); | |
1547 | if (fd < 0) | |
1548 | return log_error_errno(fd, "Failed to create listening socket: %m"); | |
1549 | ||
1550 | return fd; | |
1551 | } | |
1552 | ||
034c6ed7 | 1553 | static int socket_open_fds(Socket *s) { |
710a6b50 LP |
1554 | _cleanup_(mac_selinux_freep) char *label = NULL; |
1555 | bool know_label = false; | |
83c60c9f LP |
1556 | SocketPort *p; |
1557 | int r; | |
1558 | ||
1559 | assert(s); | |
1560 | ||
034c6ed7 | 1561 | LIST_FOREACH(port, p, s->ports) { |
83c60c9f | 1562 | |
034c6ed7 LP |
1563 | if (p->fd >= 0) |
1564 | continue; | |
83c60c9f | 1565 | |
00411a13 LP |
1566 | switch (p->type) { |
1567 | ||
1568 | case SOCKET_SOCKET: | |
049f8642 | 1569 | |
7f416dae | 1570 | if (!know_label) { |
d24e561d LP |
1571 | /* Figure out label, if we don't it know yet. We do it once, for the first socket where |
1572 | * we need this and remember it for the rest. */ | |
7f416dae | 1573 | |
d24e561d LP |
1574 | r = socket_determine_selinux_label(s, &label); |
1575 | if (r < 0) | |
1576 | goto rollback; | |
049f8642 LP |
1577 | |
1578 | know_label = true; | |
1579 | } | |
1580 | ||
74bb646e | 1581 | /* Apply the socket protocol */ |
d24e561d | 1582 | switch (p->address.type) { |
d2a50e3b | 1583 | |
74bb646e SS |
1584 | case SOCK_STREAM: |
1585 | case SOCK_SEQPACKET: | |
d24e561d LP |
1586 | if (s->socket_protocol == IPPROTO_SCTP) |
1587 | p->address.protocol = s->socket_protocol; | |
74bb646e | 1588 | break; |
d2a50e3b | 1589 | |
74bb646e | 1590 | case SOCK_DGRAM: |
d24e561d LP |
1591 | if (s->socket_protocol == IPPROTO_UDPLITE) |
1592 | p->address.protocol = s->socket_protocol; | |
74bb646e SS |
1593 | break; |
1594 | } | |
1595 | ||
a79279c7 | 1596 | r = socket_address_listen_in_cgroup(s, &p->address, label); |
175a3d25 | 1597 | if (r < 0) |
83c60c9f LP |
1598 | goto rollback; |
1599 | ||
175a3d25 | 1600 | p->fd = r; |
4fd5948e | 1601 | socket_apply_socket_options(s, p->fd); |
811ba7a0 | 1602 | socket_symlink(s); |
00411a13 | 1603 | break; |
4fd5948e | 1604 | |
00411a13 | 1605 | case SOCKET_SPECIAL: |
b0a3f2bc | 1606 | |
55301ec0 | 1607 | p->fd = special_address_create(p->path, s->writable); |
e8da24a6 LP |
1608 | if (p->fd < 0) { |
1609 | r = p->fd; | |
b0a3f2bc | 1610 | goto rollback; |
e8da24a6 | 1611 | } |
00411a13 | 1612 | break; |
b0a3f2bc | 1613 | |
00411a13 | 1614 | case SOCKET_FIFO: |
83c60c9f | 1615 | |
e8da24a6 | 1616 | p->fd = fifo_address_create( |
175a3d25 LP |
1617 | p->path, |
1618 | s->directory_mode, | |
e8da24a6 LP |
1619 | s->socket_mode); |
1620 | if (p->fd < 0) { | |
1621 | r = p->fd; | |
83c60c9f | 1622 | goto rollback; |
e8da24a6 | 1623 | } |
83c60c9f | 1624 | |
b15bdda8 | 1625 | socket_apply_fifo_options(s, p->fd); |
811ba7a0 | 1626 | socket_symlink(s); |
00411a13 | 1627 | break; |
811ba7a0 | 1628 | |
00411a13 | 1629 | case SOCKET_MQUEUE: |
83c60c9f | 1630 | |
e8da24a6 | 1631 | p->fd = mq_address_create( |
175a3d25 LP |
1632 | p->path, |
1633 | s->socket_mode, | |
1634 | s->mq_maxmsg, | |
e8da24a6 LP |
1635 | s->mq_msgsize); |
1636 | if (p->fd < 0) { | |
1637 | r = p->fd; | |
916abb21 | 1638 | goto rollback; |
e8da24a6 | 1639 | } |
00411a13 | 1640 | break; |
e8da24a6 | 1641 | |
d2a50e3b | 1642 | case SOCKET_USB_FUNCTION: { |
27a6ea91 | 1643 | _cleanup_free_ char *ep = NULL; |
60252446 | 1644 | |
27a6ea91 GB |
1645 | ep = path_make_absolute("ep0", p->path); |
1646 | ||
1647 | p->fd = usbffs_address_create(ep); | |
e8da24a6 LP |
1648 | if (p->fd < 0) { |
1649 | r = p->fd; | |
60252446 | 1650 | goto rollback; |
e8da24a6 | 1651 | } |
60252446 | 1652 | |
36078102 | 1653 | r = usbffs_write_descs(p->fd, SERVICE(UNIT_DEREF(s->service))); |
6b7e5923 PS |
1654 | if (r < 0) |
1655 | goto rollback; | |
1656 | ||
36078102 | 1657 | r = usbffs_dispatch_eps(p); |
60252446 PS |
1658 | if (r < 0) |
1659 | goto rollback; | |
00411a13 LP |
1660 | |
1661 | break; | |
27a6ea91 | 1662 | } |
00411a13 | 1663 | default: |
b15bdda8 | 1664 | assert_not_reached("Unknown port type"); |
00411a13 | 1665 | } |
034c6ed7 LP |
1666 | } |
1667 | ||
1668 | return 0; | |
1669 | ||
1670 | rollback: | |
1671 | socket_close_fds(s); | |
1672 | return r; | |
1673 | } | |
1674 | ||
1675 | static void socket_unwatch_fds(Socket *s) { | |
1676 | SocketPort *p; | |
718db961 | 1677 | int r; |
9152c765 | 1678 | |
034c6ed7 LP |
1679 | assert(s); |
1680 | ||
1681 | LIST_FOREACH(port, p, s->ports) { | |
1682 | if (p->fd < 0) | |
1683 | continue; | |
1684 | ||
a4152e3f LP |
1685 | if (!p->event_source) |
1686 | continue; | |
1687 | ||
1688 | r = sd_event_source_set_enabled(p->event_source, SD_EVENT_OFF); | |
1689 | if (r < 0) | |
f2341e0a | 1690 | log_unit_debug_errno(UNIT(s), r, "Failed to disable event source: %m"); |
83c60c9f | 1691 | } |
034c6ed7 LP |
1692 | } |
1693 | ||
1694 | static int socket_watch_fds(Socket *s) { | |
1695 | SocketPort *p; | |
1696 | int r; | |
1697 | ||
1698 | assert(s); | |
83c60c9f | 1699 | |
034c6ed7 LP |
1700 | LIST_FOREACH(port, p, s->ports) { |
1701 | if (p->fd < 0) | |
1702 | continue; | |
1703 | ||
cbf60d0a | 1704 | if (p->event_source) { |
718db961 | 1705 | r = sd_event_source_set_enabled(p->event_source, SD_EVENT_ON); |
cbf60d0a LP |
1706 | if (r < 0) |
1707 | goto fail; | |
1708 | } else { | |
151b9b96 | 1709 | r = sd_event_add_io(UNIT(s)->manager->event, &p->event_source, p->fd, EPOLLIN, socket_dispatch_io, p); |
cbf60d0a LP |
1710 | if (r < 0) |
1711 | goto fail; | |
4f2d528d | 1712 | |
cbf60d0a | 1713 | (void) sd_event_source_set_description(p->event_source, "socket-port-io"); |
718db961 | 1714 | } |
034c6ed7 | 1715 | } |
83c60c9f | 1716 | |
542563ba | 1717 | return 0; |
83c60c9f | 1718 | |
034c6ed7 | 1719 | fail: |
cbf60d0a | 1720 | log_unit_warning_errno(UNIT(s), r, "Failed to watch listening fds: %m"); |
034c6ed7 LP |
1721 | socket_unwatch_fds(s); |
1722 | return r; | |
1723 | } | |
1724 | ||
01a8b467 LP |
1725 | enum { |
1726 | SOCKET_OPEN_NONE, | |
1727 | SOCKET_OPEN_SOME, | |
1728 | SOCKET_OPEN_ALL, | |
1729 | }; | |
1730 | ||
1731 | static int socket_check_open(Socket *s) { | |
1732 | bool have_open = false, have_closed = false; | |
1733 | SocketPort *p; | |
1734 | ||
1735 | assert(s); | |
1736 | ||
1737 | LIST_FOREACH(port, p, s->ports) { | |
1738 | if (p->fd < 0) | |
1739 | have_closed = true; | |
1740 | else | |
1741 | have_open = true; | |
1742 | ||
1743 | if (have_open && have_closed) | |
1744 | return SOCKET_OPEN_SOME; | |
1745 | } | |
1746 | ||
1747 | if (have_open) | |
1748 | return SOCKET_OPEN_ALL; | |
1749 | ||
1750 | return SOCKET_OPEN_NONE; | |
1751 | } | |
1752 | ||
034c6ed7 LP |
1753 | static void socket_set_state(Socket *s, SocketState state) { |
1754 | SocketState old_state; | |
1755 | assert(s); | |
1756 | ||
1757 | old_state = s->state; | |
1758 | s->state = state; | |
1759 | ||
bd1fe7c7 LP |
1760 | if (!IN_SET(state, |
1761 | SOCKET_START_PRE, | |
3900e5fd | 1762 | SOCKET_START_CHOWN, |
bd1fe7c7 LP |
1763 | SOCKET_START_POST, |
1764 | SOCKET_STOP_PRE, | |
1765 | SOCKET_STOP_PRE_SIGTERM, | |
1766 | SOCKET_STOP_PRE_SIGKILL, | |
1767 | SOCKET_STOP_POST, | |
1768 | SOCKET_FINAL_SIGTERM, | |
1769 | SOCKET_FINAL_SIGKILL)) { | |
718db961 LP |
1770 | |
1771 | s->timer_event_source = sd_event_source_unref(s->timer_event_source); | |
5e94833f | 1772 | socket_unwatch_control_pid(s); |
034c6ed7 | 1773 | s->control_command = NULL; |
a16e1123 | 1774 | s->control_command_id = _SOCKET_EXEC_COMMAND_INVALID; |
e537352b | 1775 | } |
034c6ed7 | 1776 | |
a16e1123 LP |
1777 | if (state != SOCKET_LISTENING) |
1778 | socket_unwatch_fds(s); | |
1779 | ||
bd1fe7c7 | 1780 | if (!IN_SET(state, |
3900e5fd | 1781 | SOCKET_START_CHOWN, |
bd1fe7c7 LP |
1782 | SOCKET_START_POST, |
1783 | SOCKET_LISTENING, | |
1784 | SOCKET_RUNNING, | |
1785 | SOCKET_STOP_PRE, | |
1786 | SOCKET_STOP_PRE_SIGTERM, | |
1787 | SOCKET_STOP_PRE_SIGKILL)) | |
034c6ed7 LP |
1788 | socket_close_fds(s); |
1789 | ||
e537352b | 1790 | if (state != old_state) |
f2341e0a | 1791 | log_unit_debug(UNIT(s), "Changed %s -> %s", socket_state_to_string(old_state), socket_state_to_string(state)); |
acbb0225 | 1792 | |
2ad2e41a | 1793 | unit_notify(UNIT(s), state_translation_table[old_state], state_translation_table[state], 0); |
034c6ed7 LP |
1794 | } |
1795 | ||
be847e82 | 1796 | static int socket_coldplug(Unit *u) { |
a16e1123 LP |
1797 | Socket *s = SOCKET(u); |
1798 | int r; | |
1799 | ||
1800 | assert(s); | |
1801 | assert(s->state == SOCKET_DEAD); | |
1802 | ||
e821075a LP |
1803 | if (s->deserialized_state == s->state) |
1804 | return 0; | |
a16e1123 | 1805 | |
c386f588 LP |
1806 | if (s->control_pid > 0 && |
1807 | pid_is_unwaited(s->control_pid) && | |
1808 | IN_SET(s->deserialized_state, | |
3900e5fd LP |
1809 | SOCKET_START_PRE, |
1810 | SOCKET_START_CHOWN, | |
1811 | SOCKET_START_POST, | |
1812 | SOCKET_STOP_PRE, | |
1813 | SOCKET_STOP_PRE_SIGTERM, | |
1814 | SOCKET_STOP_PRE_SIGKILL, | |
1815 | SOCKET_STOP_POST, | |
1816 | SOCKET_FINAL_SIGTERM, | |
1817 | SOCKET_FINAL_SIGKILL)) { | |
a16e1123 | 1818 | |
e821075a LP |
1819 | r = unit_watch_pid(UNIT(s), s->control_pid); |
1820 | if (r < 0) | |
1821 | return r; | |
a16e1123 | 1822 | |
36c16a7c | 1823 | r = socket_arm_timer(s, usec_add(u->state_change_timestamp.monotonic, s->timeout_usec)); |
e821075a LP |
1824 | if (r < 0) |
1825 | return r; | |
1826 | } | |
a16e1123 | 1827 | |
3900e5fd LP |
1828 | if (IN_SET(s->deserialized_state, |
1829 | SOCKET_START_CHOWN, | |
1830 | SOCKET_START_POST, | |
1831 | SOCKET_LISTENING, | |
01a8b467 LP |
1832 | SOCKET_RUNNING)) { |
1833 | ||
1834 | /* Originally, we used to simply reopen all sockets here that we didn't have file descriptors | |
1835 | * for. However, this is problematic, as we won't traverse throught the SOCKET_START_CHOWN state for | |
1836 | * them, and thus the UID/GID wouldn't be right. Hence, instead simply check if we have all fds open, | |
1837 | * and if there's a mismatch, warn loudly. */ | |
1838 | ||
1839 | r = socket_check_open(s); | |
1840 | if (r == SOCKET_OPEN_NONE) | |
1841 | log_unit_warning(UNIT(s), | |
1842 | "Socket unit configuration has changed while unit has been running, " | |
1843 | "no open socket file descriptor left. " | |
1844 | "The socket unit is not functional until restarted."); | |
1845 | else if (r == SOCKET_OPEN_SOME) | |
1846 | log_unit_warning(UNIT(s), | |
1847 | "Socket unit configuration has changed while unit has been running, " | |
1848 | "and some socket file descriptors have not been opened yet. " | |
1849 | "The socket unit is not fully functional until restarted."); | |
e821075a | 1850 | } |
a16e1123 | 1851 | |
e821075a LP |
1852 | if (s->deserialized_state == SOCKET_LISTENING) { |
1853 | r = socket_watch_fds(s); | |
1854 | if (r < 0) | |
1855 | return r; | |
a16e1123 LP |
1856 | } |
1857 | ||
e8a565cb | 1858 | if (!IN_SET(s->deserialized_state, SOCKET_DEAD, SOCKET_FAILED)) { |
29206d46 | 1859 | (void) unit_setup_dynamic_creds(u); |
e8a565cb YW |
1860 | (void) unit_setup_exec_runtime(u); |
1861 | } | |
29206d46 | 1862 | |
e821075a | 1863 | socket_set_state(s, s->deserialized_state); |
a16e1123 LP |
1864 | return 0; |
1865 | } | |
1866 | ||
e537352b | 1867 | static int socket_spawn(Socket *s, ExecCommand *c, pid_t *_pid) { |
3c7416b6 | 1868 | |
9fa95f85 | 1869 | ExecParameters exec_params = { |
1703fa41 | 1870 | .flags = EXEC_APPLY_SANDBOXING|EXEC_APPLY_CHROOT|EXEC_APPLY_TTY_STDIN, |
c39f1ce2 LP |
1871 | .stdin_fd = -1, |
1872 | .stdout_fd = -1, | |
1873 | .stderr_fd = -1, | |
9fa95f85 | 1874 | }; |
3c7416b6 LP |
1875 | pid_t pid; |
1876 | int r; | |
034c6ed7 LP |
1877 | |
1878 | assert(s); | |
1879 | assert(c); | |
1880 | assert(_pid); | |
1881 | ||
3c7416b6 | 1882 | r = unit_prepare_exec(UNIT(s)); |
29206d46 LP |
1883 | if (r < 0) |
1884 | return r; | |
1885 | ||
36c16a7c | 1886 | r = socket_arm_timer(s, usec_add(now(CLOCK_MONOTONIC), s->timeout_usec)); |
36697dc0 | 1887 | if (r < 0) |
36c16a7c | 1888 | return r; |
034c6ed7 | 1889 | |
f0d47797 | 1890 | unit_set_exec_params(UNIT(s), &exec_params); |
3536f49e | 1891 | |
5125e762 | 1892 | exec_params.argv = c->argv; |
9fa95f85 | 1893 | |
f2341e0a LP |
1894 | r = exec_spawn(UNIT(s), |
1895 | c, | |
9e2f7c11 | 1896 | &s->exec_context, |
9fa95f85 | 1897 | &exec_params, |
613b411c | 1898 | s->exec_runtime, |
29206d46 | 1899 | &s->dynamic_creds, |
9e2f7c11 | 1900 | &pid); |
cee288ad | 1901 | if (r < 0) |
36c16a7c | 1902 | return r; |
9e2f7c11 | 1903 | |
3900e5fd | 1904 | r = unit_watch_pid(UNIT(s), pid); |
9e2f7c11 | 1905 | if (r < 0) |
3900e5fd | 1906 | /* FIXME: we need to do something here */ |
36c16a7c | 1907 | return r; |
034c6ed7 | 1908 | |
3900e5fd | 1909 | *_pid = pid; |
3536f49e | 1910 | |
3900e5fd | 1911 | return 0; |
3900e5fd LP |
1912 | } |
1913 | ||
1914 | static int socket_chown(Socket *s, pid_t *_pid) { | |
1915 | pid_t pid; | |
1916 | int r; | |
1917 | ||
36c16a7c | 1918 | r = socket_arm_timer(s, usec_add(now(CLOCK_MONOTONIC), s->timeout_usec)); |
3900e5fd LP |
1919 | if (r < 0) |
1920 | goto fail; | |
1921 | ||
1922 | /* We have to resolve the user names out-of-process, hence | |
1923 | * let's fork here. It's messy, but well, what can we do? */ | |
1924 | ||
4c253ed1 | 1925 | r = unit_fork_helper_process(UNIT(s), "(sd-chown)", &pid); |
a79279c7 LP |
1926 | if (r < 0) |
1927 | return r; | |
1928 | if (r == 0) { | |
fed1e721 LP |
1929 | uid_t uid = UID_INVALID; |
1930 | gid_t gid = GID_INVALID; | |
a79279c7 | 1931 | SocketPort *p; |
3900e5fd | 1932 | |
a79279c7 | 1933 | /* Child */ |
3900e5fd LP |
1934 | |
1935 | if (!isempty(s->user)) { | |
1936 | const char *user = s->user; | |
1937 | ||
1938 | r = get_user_creds(&user, &uid, &gid, NULL, NULL); | |
1939 | if (r < 0) { | |
a79279c7 LP |
1940 | log_unit_error_errno(UNIT(s), r, "Failed to resolve user %s: %m", user); |
1941 | _exit(EXIT_USER); | |
3900e5fd LP |
1942 | } |
1943 | } | |
1944 | ||
1945 | if (!isempty(s->group)) { | |
1946 | const char *group = s->group; | |
1947 | ||
1948 | r = get_group_creds(&group, &gid); | |
1949 | if (r < 0) { | |
a79279c7 LP |
1950 | log_unit_error_errno(UNIT(s), r, "Failed to resolve group %s: %m", group); |
1951 | _exit(EXIT_GROUP); | |
3900e5fd LP |
1952 | } |
1953 | } | |
1954 | ||
1955 | LIST_FOREACH(port, p, s->ports) { | |
e5a1c18d | 1956 | const char *path = NULL; |
3900e5fd LP |
1957 | |
1958 | if (p->type == SOCKET_SOCKET) | |
1959 | path = socket_address_get_path(&p->address); | |
1960 | else if (p->type == SOCKET_FIFO) | |
1961 | path = p->path; | |
1962 | ||
1963 | if (!path) | |
1964 | continue; | |
1965 | ||
1966 | if (chown(path, uid, gid) < 0) { | |
a79279c7 LP |
1967 | log_unit_error_errno(UNIT(s), errno, "Failed to chown(): %m"); |
1968 | _exit(EXIT_CHOWN); | |
3900e5fd LP |
1969 | } |
1970 | } | |
1971 | ||
a79279c7 | 1972 | _exit(EXIT_SUCCESS); |
3900e5fd LP |
1973 | } |
1974 | ||
718db961 LP |
1975 | r = unit_watch_pid(UNIT(s), pid); |
1976 | if (r < 0) | |
034c6ed7 | 1977 | goto fail; |
83c60c9f | 1978 | |
034c6ed7 | 1979 | *_pid = pid; |
034c6ed7 LP |
1980 | return 0; |
1981 | ||
1982 | fail: | |
718db961 | 1983 | s->timer_event_source = sd_event_source_unref(s->timer_event_source); |
83c60c9f | 1984 | return r; |
542563ba LP |
1985 | } |
1986 | ||
cfc4eb4c | 1987 | static void socket_enter_dead(Socket *s, SocketResult f) { |
034c6ed7 LP |
1988 | assert(s); |
1989 | ||
a0fef983 | 1990 | if (s->result == SOCKET_SUCCESS) |
cfc4eb4c | 1991 | s->result = f; |
034c6ed7 | 1992 | |
ed77d407 LP |
1993 | if (s->result != SOCKET_SUCCESS) |
1994 | log_unit_warning(UNIT(s), "Failed with result '%s'.", socket_result_to_string(s->result)); | |
1995 | ||
29206d46 LP |
1996 | socket_set_state(s, s->result != SOCKET_SUCCESS ? SOCKET_FAILED : SOCKET_DEAD); |
1997 | ||
e8a565cb | 1998 | s->exec_runtime = exec_runtime_unref(s->exec_runtime, true); |
613b411c | 1999 | |
3536f49e | 2000 | exec_context_destroy_runtime_directory(&s->exec_context, UNIT(s)->manager->prefix[EXEC_DIRECTORY_RUNTIME]); |
e66cf1a3 | 2001 | |
00d9ef85 LP |
2002 | unit_unref_uid_gid(UNIT(s), true); |
2003 | ||
29206d46 | 2004 | dynamic_creds_destroy(&s->dynamic_creds); |
034c6ed7 LP |
2005 | } |
2006 | ||
cfc4eb4c | 2007 | static void socket_enter_signal(Socket *s, SocketState state, SocketResult f); |
80876c20 | 2008 | |
cfc4eb4c | 2009 | static void socket_enter_stop_post(Socket *s, SocketResult f) { |
034c6ed7 LP |
2010 | int r; |
2011 | assert(s); | |
2012 | ||
a0fef983 | 2013 | if (s->result == SOCKET_SUCCESS) |
cfc4eb4c | 2014 | s->result = f; |
034c6ed7 | 2015 | |
5e94833f | 2016 | socket_unwatch_control_pid(s); |
a16e1123 | 2017 | s->control_command_id = SOCKET_EXEC_STOP_POST; |
3900e5fd | 2018 | s->control_command = s->exec_command[SOCKET_EXEC_STOP_POST]; |
a16e1123 | 2019 | |
3900e5fd LP |
2020 | if (s->control_command) { |
2021 | r = socket_spawn(s, s->control_command, &s->control_pid); | |
2022 | if (r < 0) | |
034c6ed7 LP |
2023 | goto fail; |
2024 | ||
80876c20 LP |
2025 | socket_set_state(s, SOCKET_STOP_POST); |
2026 | } else | |
cfc4eb4c | 2027 | socket_enter_signal(s, SOCKET_FINAL_SIGTERM, SOCKET_SUCCESS); |
034c6ed7 LP |
2028 | |
2029 | return; | |
2030 | ||
2031 | fail: | |
f2341e0a | 2032 | log_unit_warning_errno(UNIT(s), r, "Failed to run 'stop-post' task: %m"); |
cfc4eb4c | 2033 | socket_enter_signal(s, SOCKET_FINAL_SIGTERM, SOCKET_FAILURE_RESOURCES); |
034c6ed7 LP |
2034 | } |
2035 | ||
cfc4eb4c | 2036 | static void socket_enter_signal(Socket *s, SocketState state, SocketResult f) { |
034c6ed7 LP |
2037 | int r; |
2038 | ||
2039 | assert(s); | |
2040 | ||
a0fef983 | 2041 | if (s->result == SOCKET_SUCCESS) |
cfc4eb4c | 2042 | s->result = f; |
034c6ed7 | 2043 | |
cd2086fe LP |
2044 | r = unit_kill_context( |
2045 | UNIT(s), | |
2046 | &s->kill_context, | |
ec2ce0c5 | 2047 | !IN_SET(state, SOCKET_STOP_PRE_SIGTERM, SOCKET_FINAL_SIGTERM) ? |
db2cb23b | 2048 | KILL_KILL : KILL_TERMINATE, |
cd2086fe LP |
2049 | -1, |
2050 | s->control_pid, | |
2051 | false); | |
2052 | if (r < 0) | |
2053 | goto fail; | |
034c6ed7 | 2054 | |
cd2086fe | 2055 | if (r > 0) { |
36c16a7c | 2056 | r = socket_arm_timer(s, usec_add(now(CLOCK_MONOTONIC), s->timeout_usec)); |
36697dc0 | 2057 | if (r < 0) |
80876c20 | 2058 | goto fail; |
d6ea93e3 | 2059 | |
80876c20 | 2060 | socket_set_state(s, state); |
ac84d1fb LP |
2061 | } else if (state == SOCKET_STOP_PRE_SIGTERM) |
2062 | socket_enter_signal(s, SOCKET_STOP_PRE_SIGKILL, SOCKET_SUCCESS); | |
2063 | else if (state == SOCKET_STOP_PRE_SIGKILL) | |
cfc4eb4c | 2064 | socket_enter_stop_post(s, SOCKET_SUCCESS); |
ac84d1fb LP |
2065 | else if (state == SOCKET_FINAL_SIGTERM) |
2066 | socket_enter_signal(s, SOCKET_FINAL_SIGKILL, SOCKET_SUCCESS); | |
80876c20 | 2067 | else |
cfc4eb4c | 2068 | socket_enter_dead(s, SOCKET_SUCCESS); |
034c6ed7 LP |
2069 | |
2070 | return; | |
2071 | ||
2072 | fail: | |
f2341e0a | 2073 | log_unit_warning_errno(UNIT(s), r, "Failed to kill processes: %m"); |
034c6ed7 | 2074 | |
3742095b | 2075 | if (IN_SET(state, SOCKET_STOP_PRE_SIGTERM, SOCKET_STOP_PRE_SIGKILL)) |
cfc4eb4c | 2076 | socket_enter_stop_post(s, SOCKET_FAILURE_RESOURCES); |
034c6ed7 | 2077 | else |
cfc4eb4c | 2078 | socket_enter_dead(s, SOCKET_FAILURE_RESOURCES); |
034c6ed7 LP |
2079 | } |
2080 | ||
cfc4eb4c | 2081 | static void socket_enter_stop_pre(Socket *s, SocketResult f) { |
034c6ed7 LP |
2082 | int r; |
2083 | assert(s); | |
2084 | ||
a0fef983 | 2085 | if (s->result == SOCKET_SUCCESS) |
cfc4eb4c | 2086 | s->result = f; |
034c6ed7 | 2087 | |
5e94833f | 2088 | socket_unwatch_control_pid(s); |
a16e1123 | 2089 | s->control_command_id = SOCKET_EXEC_STOP_PRE; |
3900e5fd | 2090 | s->control_command = s->exec_command[SOCKET_EXEC_STOP_PRE]; |
a16e1123 | 2091 | |
3900e5fd LP |
2092 | if (s->control_command) { |
2093 | r = socket_spawn(s, s->control_command, &s->control_pid); | |
2094 | if (r < 0) | |
034c6ed7 LP |
2095 | goto fail; |
2096 | ||
80876c20 LP |
2097 | socket_set_state(s, SOCKET_STOP_PRE); |
2098 | } else | |
cfc4eb4c | 2099 | socket_enter_stop_post(s, SOCKET_SUCCESS); |
034c6ed7 LP |
2100 | |
2101 | return; | |
2102 | ||
2103 | fail: | |
f2341e0a | 2104 | log_unit_warning_errno(UNIT(s), r, "Failed to run 'stop-pre' task: %m"); |
cfc4eb4c | 2105 | socket_enter_stop_post(s, SOCKET_FAILURE_RESOURCES); |
034c6ed7 LP |
2106 | } |
2107 | ||
e9af15c3 LP |
2108 | static void socket_enter_listening(Socket *s) { |
2109 | int r; | |
2110 | assert(s); | |
2111 | ||
cfc4eb4c LP |
2112 | r = socket_watch_fds(s); |
2113 | if (r < 0) { | |
f2341e0a | 2114 | log_unit_warning_errno(UNIT(s), r, "Failed to watch sockets: %m"); |
e9af15c3 LP |
2115 | goto fail; |
2116 | } | |
2117 | ||
2118 | socket_set_state(s, SOCKET_LISTENING); | |
2119 | return; | |
2120 | ||
2121 | fail: | |
cfc4eb4c | 2122 | socket_enter_stop_pre(s, SOCKET_FAILURE_RESOURCES); |
e9af15c3 LP |
2123 | } |
2124 | ||
034c6ed7 LP |
2125 | static void socket_enter_start_post(Socket *s) { |
2126 | int r; | |
2127 | assert(s); | |
2128 | ||
3900e5fd LP |
2129 | socket_unwatch_control_pid(s); |
2130 | s->control_command_id = SOCKET_EXEC_START_POST; | |
2131 | s->control_command = s->exec_command[SOCKET_EXEC_START_POST]; | |
2132 | ||
2133 | if (s->control_command) { | |
2134 | r = socket_spawn(s, s->control_command, &s->control_pid); | |
2135 | if (r < 0) { | |
f2341e0a | 2136 | log_unit_warning_errno(UNIT(s), r, "Failed to run 'start-post' task: %m"); |
3900e5fd LP |
2137 | goto fail; |
2138 | } | |
2139 | ||
2140 | socket_set_state(s, SOCKET_START_POST); | |
2141 | } else | |
2142 | socket_enter_listening(s); | |
2143 | ||
2144 | return; | |
2145 | ||
2146 | fail: | |
2147 | socket_enter_stop_pre(s, SOCKET_FAILURE_RESOURCES); | |
2148 | } | |
2149 | ||
2150 | static void socket_enter_start_chown(Socket *s) { | |
2151 | int r; | |
2152 | ||
2153 | assert(s); | |
2154 | ||
cfc4eb4c LP |
2155 | r = socket_open_fds(s); |
2156 | if (r < 0) { | |
f2341e0a | 2157 | log_unit_warning_errno(UNIT(s), r, "Failed to listen on sockets: %m"); |
034c6ed7 LP |
2158 | goto fail; |
2159 | } | |
2160 | ||
3900e5fd | 2161 | if (!isempty(s->user) || !isempty(s->group)) { |
5e94833f | 2162 | |
3900e5fd LP |
2163 | socket_unwatch_control_pid(s); |
2164 | s->control_command_id = SOCKET_EXEC_START_CHOWN; | |
2165 | s->control_command = NULL; | |
a16e1123 | 2166 | |
3900e5fd | 2167 | r = socket_chown(s, &s->control_pid); |
cfc4eb4c | 2168 | if (r < 0) { |
f2341e0a | 2169 | log_unit_warning_errno(UNIT(s), r, "Failed to fork 'start-chown' task: %m"); |
034c6ed7 LP |
2170 | goto fail; |
2171 | } | |
2172 | ||
3900e5fd | 2173 | socket_set_state(s, SOCKET_START_CHOWN); |
80876c20 | 2174 | } else |
3900e5fd | 2175 | socket_enter_start_post(s); |
034c6ed7 LP |
2176 | |
2177 | return; | |
2178 | ||
2179 | fail: | |
cfc4eb4c | 2180 | socket_enter_stop_pre(s, SOCKET_FAILURE_RESOURCES); |
034c6ed7 LP |
2181 | } |
2182 | ||
2183 | static void socket_enter_start_pre(Socket *s) { | |
2184 | int r; | |
2185 | assert(s); | |
2186 | ||
5e94833f | 2187 | socket_unwatch_control_pid(s); |
a4634b21 LP |
2188 | |
2189 | unit_warn_leftover_processes(UNIT(s)); | |
2190 | ||
a16e1123 | 2191 | s->control_command_id = SOCKET_EXEC_START_PRE; |
3900e5fd | 2192 | s->control_command = s->exec_command[SOCKET_EXEC_START_PRE]; |
a16e1123 | 2193 | |
3900e5fd | 2194 | if (s->control_command) { |
e821075a | 2195 | r = socket_spawn(s, s->control_command, &s->control_pid); |
3900e5fd | 2196 | if (r < 0) { |
f2341e0a | 2197 | log_unit_warning_errno(UNIT(s), r, "Failed to run 'start-pre' task: %m"); |
034c6ed7 | 2198 | goto fail; |
3900e5fd | 2199 | } |
034c6ed7 | 2200 | |
80876c20 LP |
2201 | socket_set_state(s, SOCKET_START_PRE); |
2202 | } else | |
3900e5fd | 2203 | socket_enter_start_chown(s); |
034c6ed7 LP |
2204 | |
2205 | return; | |
2206 | ||
2207 | fail: | |
cfc4eb4c | 2208 | socket_enter_dead(s, SOCKET_FAILURE_RESOURCES); |
034c6ed7 LP |
2209 | } |
2210 | ||
60d9771c LP |
2211 | static void flush_ports(Socket *s) { |
2212 | SocketPort *p; | |
2213 | ||
2214 | /* Flush all incoming traffic, regardless if actual bytes or new connections, so that this socket isn't busy | |
2215 | * anymore */ | |
2216 | ||
2217 | LIST_FOREACH(port, p, s->ports) { | |
2218 | if (p->fd < 0) | |
2219 | continue; | |
2220 | ||
2221 | (void) flush_accept(p->fd); | |
2222 | (void) flush_fd(p->fd); | |
2223 | } | |
2224 | } | |
2225 | ||
4f2d528d | 2226 | static void socket_enter_running(Socket *s, int cfd) { |
4afd3348 | 2227 | _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL; |
034c6ed7 LP |
2228 | int r; |
2229 | ||
8b26cdbd LP |
2230 | /* Note that this call takes possession of the connection fd passed. It either has to assign it somewhere or |
2231 | * close it. */ | |
2232 | ||
034c6ed7 LP |
2233 | assert(s); |
2234 | ||
60d9771c | 2235 | /* We don't take connections anymore if we are supposed to shut down anyway */ |
31afa0a4 | 2236 | if (unit_stop_pending(UNIT(s))) { |
e821075a | 2237 | |
f2341e0a | 2238 | log_unit_debug(UNIT(s), "Suppressing connection request since unit stop is scheduled."); |
5d909e3e | 2239 | |
7c610628 | 2240 | if (cfd >= 0) |
a98f7575 | 2241 | goto refuse; |
60d9771c LP |
2242 | else |
2243 | flush_ports(s); | |
7c610628 | 2244 | |
ba3e67a7 LP |
2245 | return; |
2246 | } | |
2247 | ||
7994ac1d | 2248 | if (!ratelimit_below(&s->trigger_limit)) { |
8b26cdbd LP |
2249 | log_unit_warning(UNIT(s), "Trigger limit hit, refusing further activation."); |
2250 | socket_enter_stop_pre(s, SOCKET_FAILURE_TRIGGER_LIMIT_HIT); | |
a98f7575 | 2251 | goto refuse; |
8b26cdbd LP |
2252 | } |
2253 | ||
4f2d528d | 2254 | if (cfd < 0) { |
f976f3f6 | 2255 | bool pending = false; |
eef85c4a LP |
2256 | Unit *other; |
2257 | Iterator i; | |
2258 | void *v; | |
f976f3f6 LP |
2259 | |
2260 | /* If there's already a start pending don't bother to | |
2261 | * do anything */ | |
eef85c4a | 2262 | HASHMAP_FOREACH_KEY(v, other, UNIT(s)->dependencies[UNIT_TRIGGERS], i) |
e821075a | 2263 | if (unit_active_or_pending(other)) { |
57020a3a LP |
2264 | pending = true; |
2265 | break; | |
2266 | } | |
f976f3f6 | 2267 | |
1a710b43 | 2268 | if (!pending) { |
640ace4a | 2269 | if (!UNIT_ISSET(s->service)) { |
f2341e0a | 2270 | log_unit_error(UNIT(s), "Service to activate vanished, refusing activation."); |
640ace4a LP |
2271 | r = -ENOENT; |
2272 | goto fail; | |
2273 | } | |
2274 | ||
4bd29fe5 | 2275 | r = manager_add_job(UNIT(s)->manager, JOB_START, UNIT_DEREF(s->service), JOB_REPLACE, &error, NULL); |
1a710b43 | 2276 | if (r < 0) |
f976f3f6 | 2277 | goto fail; |
1a710b43 | 2278 | } |
4f2d528d LP |
2279 | |
2280 | socket_set_state(s, SOCKET_RUNNING); | |
2281 | } else { | |
e55001eb | 2282 | _cleanup_free_ char *prefix = NULL, *instance = NULL, *name = NULL; |
9d565427 | 2283 | _cleanup_(socket_peer_unrefp) SocketPeer *p = NULL; |
b15bdda8 | 2284 | Service *service; |
4f2d528d | 2285 | |
6cf6bbc2 | 2286 | if (s->n_connections >= s->max_connections) { |
ea8f50f8 | 2287 | log_unit_warning(UNIT(s), "Too many incoming connections (%u), dropping connection.", |
166cf510 | 2288 | s->n_connections); |
a98f7575 | 2289 | goto refuse; |
6cf6bbc2 LP |
2290 | } |
2291 | ||
9d565427 | 2292 | if (s->max_connections_per_source > 0) { |
166cf510 | 2293 | r = socket_acquire_peer(s, cfd, &p); |
9d565427 | 2294 | if (r < 0) { |
a98f7575 | 2295 | goto refuse; |
166cf510 | 2296 | } else if (r > 0 && p->n_ref > s->max_connections_per_source) { |
ea8f50f8 ZJS |
2297 | _cleanup_free_ char *t = NULL; |
2298 | ||
41733ae1 | 2299 | (void) sockaddr_pretty(&p->peer.sa, p->peer_salen, true, false, &t); |
ea8f50f8 | 2300 | |
166cf510 | 2301 | log_unit_warning(UNIT(s), |
ea8f50f8 ZJS |
2302 | "Too many incoming connections (%u) from source %s, dropping connection.", |
2303 | p->n_ref, strnull(t)); | |
a98f7575 | 2304 | goto refuse; |
9d565427 SS |
2305 | } |
2306 | } | |
2307 | ||
1a710b43 MS |
2308 | r = socket_instantiate_service(s); |
2309 | if (r < 0) | |
b15bdda8 LP |
2310 | goto fail; |
2311 | ||
1a710b43 MS |
2312 | r = instance_from_socket(cfd, s->n_accepted, &instance); |
2313 | if (r < 0) { | |
2314 | if (r != -ENOTCONN) | |
2315 | goto fail; | |
2316 | ||
2317 | /* ENOTCONN is legitimate if TCP RST was received. | |
2318 | * This connection is over, but the socket unit lives on. */ | |
8b26cdbd | 2319 | log_unit_debug(UNIT(s), "Got ENOTCONN on incoming socket, assuming aborted connection attempt, ignoring."); |
a98f7575 | 2320 | goto refuse; |
1a710b43 | 2321 | } |
4f2d528d | 2322 | |
7410616c LP |
2323 | r = unit_name_to_prefix(UNIT(s)->id, &prefix); |
2324 | if (r < 0) | |
4f2d528d | 2325 | goto fail; |
4f2d528d | 2326 | |
7410616c LP |
2327 | r = unit_name_build(prefix, instance, ".service", &name); |
2328 | if (r < 0) | |
b6dbbe1c | 2329 | goto fail; |
4f2d528d | 2330 | |
1a710b43 | 2331 | r = unit_add_name(UNIT_DEREF(s->service), name); |
e55001eb | 2332 | if (r < 0) |
4f2d528d | 2333 | goto fail; |
b15bdda8 | 2334 | |
57020a3a LP |
2335 | service = SERVICE(UNIT_DEREF(s->service)); |
2336 | unit_ref_unset(&s->service); | |
6c073082 | 2337 | |
e4f67317 | 2338 | s->n_accepted++; |
b15bdda8 | 2339 | unit_choose_id(UNIT(service), name); |
b15bdda8 | 2340 | |
16115b0a | 2341 | r = service_set_socket_fd(service, cfd, s, s->selinux_context_from_net); |
1a710b43 | 2342 | if (r < 0) |
4f2d528d LP |
2343 | goto fail; |
2344 | ||
8b26cdbd | 2345 | cfd = -1; /* We passed ownership of the fd to the service now. Forget it here. */ |
313cefa1 | 2346 | s->n_connections++; |
6cf6bbc2 | 2347 | |
1cc6c93a | 2348 | service->peer = TAKE_PTR(p); /* Pass ownership of the peer reference */ |
9d565427 | 2349 | |
4bd29fe5 | 2350 | r = manager_add_job(UNIT(s)->manager, JOB_START, UNIT(service), JOB_REPLACE, &error, NULL); |
3e7a1f50 LP |
2351 | if (r < 0) { |
2352 | /* We failed to activate the new service, but it still exists. Let's make sure the service | |
2353 | * closes and forgets the connection fd again, immediately. */ | |
2354 | service_close_socket_fd(service); | |
4f2d528d | 2355 | goto fail; |
3e7a1f50 | 2356 | } |
c4e2ceae LP |
2357 | |
2358 | /* Notify clients about changed counters */ | |
2359 | unit_add_to_dbus_queue(UNIT(s)); | |
4f2d528d | 2360 | } |
034c6ed7 | 2361 | |
034c6ed7 LP |
2362 | return; |
2363 | ||
a98f7575 MM |
2364 | refuse: |
2365 | s->n_refused++; | |
2366 | safe_close(cfd); | |
2367 | return; | |
2368 | ||
034c6ed7 | 2369 | fail: |
f2341e0a LP |
2370 | log_unit_warning(UNIT(s), "Failed to queue service startup job (Maybe the service file is missing or not a %s unit?): %s", |
2371 | cfd >= 0 ? "template" : "non-template", | |
718db961 | 2372 | bus_error_message(&error, r)); |
e821075a | 2373 | |
60089004 | 2374 | socket_enter_stop_pre(s, SOCKET_FAILURE_RESOURCES); |
03e334a1 | 2375 | safe_close(cfd); |
034c6ed7 LP |
2376 | } |
2377 | ||
cfc4eb4c | 2378 | static void socket_run_next(Socket *s) { |
034c6ed7 LP |
2379 | int r; |
2380 | ||
2381 | assert(s); | |
2382 | assert(s->control_command); | |
2383 | assert(s->control_command->command_next); | |
2384 | ||
5e94833f LP |
2385 | socket_unwatch_control_pid(s); |
2386 | ||
034c6ed7 LP |
2387 | s->control_command = s->control_command->command_next; |
2388 | ||
e821075a LP |
2389 | r = socket_spawn(s, s->control_command, &s->control_pid); |
2390 | if (r < 0) | |
034c6ed7 LP |
2391 | goto fail; |
2392 | ||
2393 | return; | |
2394 | ||
2395 | fail: | |
f2341e0a | 2396 | log_unit_warning_errno(UNIT(s), r, "Failed to run next task: %m"); |
80876c20 LP |
2397 | |
2398 | if (s->state == SOCKET_START_POST) | |
cfc4eb4c | 2399 | socket_enter_stop_pre(s, SOCKET_FAILURE_RESOURCES); |
034c6ed7 | 2400 | else if (s->state == SOCKET_STOP_POST) |
cfc4eb4c | 2401 | socket_enter_dead(s, SOCKET_FAILURE_RESOURCES); |
034c6ed7 | 2402 | else |
cfc4eb4c | 2403 | socket_enter_signal(s, SOCKET_FINAL_SIGTERM, SOCKET_FAILURE_RESOURCES); |
034c6ed7 LP |
2404 | } |
2405 | ||
87f0e418 LP |
2406 | static int socket_start(Unit *u) { |
2407 | Socket *s = SOCKET(u); | |
07299350 | 2408 | int r; |
83c60c9f LP |
2409 | |
2410 | assert(s); | |
2411 | ||
034c6ed7 LP |
2412 | /* We cannot fulfill this request right now, try again later |
2413 | * please! */ | |
3900e5fd LP |
2414 | if (IN_SET(s->state, |
2415 | SOCKET_STOP_PRE, | |
2416 | SOCKET_STOP_PRE_SIGKILL, | |
2417 | SOCKET_STOP_PRE_SIGTERM, | |
2418 | SOCKET_STOP_POST, | |
2419 | SOCKET_FINAL_SIGTERM, | |
2420 | SOCKET_FINAL_SIGKILL)) | |
034c6ed7 LP |
2421 | return -EAGAIN; |
2422 | ||
a4152e3f | 2423 | /* Already on it! */ |
3900e5fd LP |
2424 | if (IN_SET(s->state, |
2425 | SOCKET_START_PRE, | |
2426 | SOCKET_START_CHOWN, | |
2427 | SOCKET_START_POST)) | |
034c6ed7 | 2428 | return 0; |
83c60c9f | 2429 | |
034c6ed7 | 2430 | /* Cannot run this without the service being around */ |
9444b1f2 | 2431 | if (UNIT_ISSET(s->service)) { |
57020a3a LP |
2432 | Service *service; |
2433 | ||
2434 | service = SERVICE(UNIT_DEREF(s->service)); | |
2435 | ||
1124fe6f | 2436 | if (UNIT(service)->load_state != UNIT_LOADED) { |
f2341e0a | 2437 | log_unit_error(u, "Socket service %s not loaded, refusing.", UNIT(service)->id); |
4f2d528d | 2438 | return -ENOENT; |
4ac9236f | 2439 | } |
4f2d528d | 2440 | |
35b8ca3a | 2441 | /* If the service is already active we cannot start the |
4f2d528d | 2442 | * socket */ |
ec2ce0c5 | 2443 | if (!IN_SET(service->state, SERVICE_DEAD, SERVICE_FAILED, SERVICE_AUTO_RESTART)) { |
f2341e0a | 2444 | log_unit_error(u, "Socket service %s already active, refusing.", UNIT(service)->id); |
4f2d528d | 2445 | return -EBUSY; |
4ac9236f | 2446 | } |
4f2d528d | 2447 | } |
e537352b | 2448 | |
3742095b | 2449 | assert(IN_SET(s->state, SOCKET_DEAD, SOCKET_FAILED)); |
83c60c9f | 2450 | |
07299350 LP |
2451 | r = unit_start_limit_test(u); |
2452 | if (r < 0) { | |
2453 | socket_enter_dead(s, SOCKET_FAILURE_START_LIMIT_HIT); | |
2454 | return r; | |
2455 | } | |
2456 | ||
4b58153d LP |
2457 | r = unit_acquire_invocation_id(u); |
2458 | if (r < 0) | |
2459 | return r; | |
2460 | ||
cfc4eb4c | 2461 | s->result = SOCKET_SUCCESS; |
3c7416b6 LP |
2462 | |
2463 | u->reset_accounting = true; | |
5ad096b3 | 2464 | |
034c6ed7 | 2465 | socket_enter_start_pre(s); |
82a2b6bb | 2466 | return 1; |
034c6ed7 | 2467 | } |
83c60c9f | 2468 | |
87f0e418 LP |
2469 | static int socket_stop(Unit *u) { |
2470 | Socket *s = SOCKET(u); | |
034c6ed7 LP |
2471 | |
2472 | assert(s); | |
2473 | ||
e537352b | 2474 | /* Already on it */ |
3900e5fd LP |
2475 | if (IN_SET(s->state, |
2476 | SOCKET_STOP_PRE, | |
2477 | SOCKET_STOP_PRE_SIGTERM, | |
2478 | SOCKET_STOP_PRE_SIGKILL, | |
2479 | SOCKET_STOP_POST, | |
2480 | SOCKET_FINAL_SIGTERM, | |
2481 | SOCKET_FINAL_SIGKILL)) | |
e537352b LP |
2482 | return 0; |
2483 | ||
3f6c78dc LP |
2484 | /* If there's already something running we go directly into |
2485 | * kill mode. */ | |
3900e5fd LP |
2486 | if (IN_SET(s->state, |
2487 | SOCKET_START_PRE, | |
2488 | SOCKET_START_CHOWN, | |
2489 | SOCKET_START_POST)) { | |
cfc4eb4c | 2490 | socket_enter_signal(s, SOCKET_STOP_PRE_SIGTERM, SOCKET_SUCCESS); |
3f6c78dc LP |
2491 | return -EAGAIN; |
2492 | } | |
2493 | ||
3742095b | 2494 | assert(IN_SET(s->state, SOCKET_LISTENING, SOCKET_RUNNING)); |
83c60c9f | 2495 | |
cfc4eb4c | 2496 | socket_enter_stop_pre(s, SOCKET_SUCCESS); |
82a2b6bb | 2497 | return 1; |
542563ba LP |
2498 | } |
2499 | ||
a16e1123 LP |
2500 | static int socket_serialize(Unit *u, FILE *f, FDSet *fds) { |
2501 | Socket *s = SOCKET(u); | |
2502 | SocketPort *p; | |
2503 | int r; | |
2504 | ||
2505 | assert(u); | |
2506 | assert(f); | |
2507 | assert(fds); | |
2508 | ||
2509 | unit_serialize_item(u, f, "state", socket_state_to_string(s->state)); | |
cfc4eb4c | 2510 | unit_serialize_item(u, f, "result", socket_result_to_string(s->result)); |
a16e1123 | 2511 | unit_serialize_item_format(u, f, "n-accepted", "%u", s->n_accepted); |
a98f7575 | 2512 | unit_serialize_item_format(u, f, "n-refused", "%u", s->n_refused); |
a16e1123 LP |
2513 | |
2514 | if (s->control_pid > 0) | |
de0671ee | 2515 | unit_serialize_item_format(u, f, "control-pid", PID_FMT, s->control_pid); |
a16e1123 LP |
2516 | |
2517 | if (s->control_command_id >= 0) | |
2518 | unit_serialize_item(u, f, "control-command", socket_exec_command_to_string(s->control_command_id)); | |
2519 | ||
2520 | LIST_FOREACH(port, p, s->ports) { | |
2521 | int copy; | |
2522 | ||
2523 | if (p->fd < 0) | |
2524 | continue; | |
2525 | ||
613b411c LP |
2526 | copy = fdset_put_dup(fds, p->fd); |
2527 | if (copy < 0) | |
a16e1123 LP |
2528 | return copy; |
2529 | ||
2530 | if (p->type == SOCKET_SOCKET) { | |
613b411c | 2531 | _cleanup_free_ char *t = NULL; |
a16e1123 | 2532 | |
ee092817 LP |
2533 | r = socket_address_print(&p->address, &t); |
2534 | if (r < 0) | |
a16e1123 LP |
2535 | return r; |
2536 | ||
7a22745a LP |
2537 | if (socket_address_family(&p->address) == AF_NETLINK) |
2538 | unit_serialize_item_format(u, f, "netlink", "%i %s", copy, t); | |
2539 | else | |
2540 | unit_serialize_item_format(u, f, "socket", "%i %i %s", copy, p->address.type, t); | |
613b411c | 2541 | |
b0a3f2bc LP |
2542 | } else if (p->type == SOCKET_SPECIAL) |
2543 | unit_serialize_item_format(u, f, "special", "%i %s", copy, p->path); | |
ee092817 LP |
2544 | else if (p->type == SOCKET_MQUEUE) |
2545 | unit_serialize_item_format(u, f, "mqueue", "%i %s", copy, p->path); | |
60252446 PS |
2546 | else if (p->type == SOCKET_USB_FUNCTION) |
2547 | unit_serialize_item_format(u, f, "ffs", "%i %s", copy, p->path); | |
b0a3f2bc | 2548 | else { |
a16e1123 LP |
2549 | assert(p->type == SOCKET_FIFO); |
2550 | unit_serialize_item_format(u, f, "fifo", "%i %s", copy, p->path); | |
2551 | } | |
2552 | } | |
2553 | ||
2554 | return 0; | |
2555 | } | |
2556 | ||
80a58668 ZJS |
2557 | static void socket_port_take_fd(SocketPort *p, FDSet *fds, int fd) { |
2558 | safe_close(p->fd); | |
2559 | p->fd = fdset_remove(fds, fd); | |
2560 | } | |
2561 | ||
a16e1123 LP |
2562 | static int socket_deserialize_item(Unit *u, const char *key, const char *value, FDSet *fds) { |
2563 | Socket *s = SOCKET(u); | |
a16e1123 LP |
2564 | |
2565 | assert(u); | |
2566 | assert(key); | |
2567 | assert(value); | |
a16e1123 LP |
2568 | |
2569 | if (streq(key, "state")) { | |
2570 | SocketState state; | |
2571 | ||
ee092817 LP |
2572 | state = socket_state_from_string(value); |
2573 | if (state < 0) | |
f2341e0a | 2574 | log_unit_debug(u, "Failed to parse state value: %s", value); |
a16e1123 LP |
2575 | else |
2576 | s->deserialized_state = state; | |
cfc4eb4c LP |
2577 | } else if (streq(key, "result")) { |
2578 | SocketResult f; | |
a16e1123 | 2579 | |
cfc4eb4c LP |
2580 | f = socket_result_from_string(value); |
2581 | if (f < 0) | |
f2341e0a | 2582 | log_unit_debug(u, "Failed to parse result value: %s", value); |
cfc4eb4c LP |
2583 | else if (f != SOCKET_SUCCESS) |
2584 | s->result = f; | |
a16e1123 LP |
2585 | |
2586 | } else if (streq(key, "n-accepted")) { | |
2587 | unsigned k; | |
2588 | ||
e364ad06 | 2589 | if (safe_atou(value, &k) < 0) |
f2341e0a | 2590 | log_unit_debug(u, "Failed to parse n-accepted value: %s", value); |
a16e1123 LP |
2591 | else |
2592 | s->n_accepted += k; | |
a98f7575 MM |
2593 | } else if (streq(key, "n-refused")) { |
2594 | unsigned k; | |
2595 | ||
2596 | if (safe_atou(value, &k) < 0) | |
2597 | log_unit_debug(u, "Failed to parse n-refused value: %s", value); | |
2598 | else | |
2599 | s->n_refused += k; | |
a16e1123 | 2600 | } else if (streq(key, "control-pid")) { |
5925dd3c | 2601 | pid_t pid; |
a16e1123 | 2602 | |
e364ad06 | 2603 | if (parse_pid(value, &pid) < 0) |
f2341e0a | 2604 | log_unit_debug(u, "Failed to parse control-pid value: %s", value); |
a16e1123 | 2605 | else |
5925dd3c | 2606 | s->control_pid = pid; |
a16e1123 LP |
2607 | } else if (streq(key, "control-command")) { |
2608 | SocketExecCommand id; | |
2609 | ||
66870f90 ZJS |
2610 | id = socket_exec_command_from_string(value); |
2611 | if (id < 0) | |
f2341e0a | 2612 | log_unit_debug(u, "Failed to parse exec-command value: %s", value); |
a16e1123 LP |
2613 | else { |
2614 | s->control_command_id = id; | |
2615 | s->control_command = s->exec_command[id]; | |
2616 | } | |
2617 | } else if (streq(key, "fifo")) { | |
2618 | int fd, skip = 0; | |
2619 | SocketPort *p; | |
2620 | ||
2621 | if (sscanf(value, "%i %n", &fd, &skip) < 1 || fd < 0 || !fdset_contains(fds, fd)) | |
f2341e0a | 2622 | log_unit_debug(u, "Failed to parse fifo value: %s", value); |
80a58668 | 2623 | else |
a16e1123 | 2624 | LIST_FOREACH(port, p, s->ports) |
b0a3f2bc | 2625 | if (p->type == SOCKET_FIFO && |
e3f791a2 | 2626 | path_equal_or_files_same(p->path, value+skip, 0)) { |
80a58668 | 2627 | socket_port_take_fd(p, fds, fd); |
b0a3f2bc | 2628 | break; |
80a58668 | 2629 | } |
b0a3f2bc LP |
2630 | |
2631 | } else if (streq(key, "special")) { | |
2632 | int fd, skip = 0; | |
2633 | SocketPort *p; | |
2634 | ||
2635 | if (sscanf(value, "%i %n", &fd, &skip) < 1 || fd < 0 || !fdset_contains(fds, fd)) | |
f2341e0a | 2636 | log_unit_debug(u, "Failed to parse special value: %s", value); |
80a58668 | 2637 | else |
b0a3f2bc LP |
2638 | LIST_FOREACH(port, p, s->ports) |
2639 | if (p->type == SOCKET_SPECIAL && | |
e3f791a2 | 2640 | path_equal_or_files_same(p->path, value+skip, 0)) { |
80a58668 | 2641 | socket_port_take_fd(p, fds, fd); |
a16e1123 | 2642 | break; |
80a58668 | 2643 | } |
a16e1123 | 2644 | |
ee092817 LP |
2645 | } else if (streq(key, "mqueue")) { |
2646 | int fd, skip = 0; | |
2647 | SocketPort *p; | |
2648 | ||
2649 | if (sscanf(value, "%i %n", &fd, &skip) < 1 || fd < 0 || !fdset_contains(fds, fd)) | |
f2341e0a | 2650 | log_unit_debug(u, "Failed to parse mqueue value: %s", value); |
80a58668 | 2651 | else |
ee092817 LP |
2652 | LIST_FOREACH(port, p, s->ports) |
2653 | if (p->type == SOCKET_MQUEUE && | |
80a58668 ZJS |
2654 | streq(p->path, value+skip)) { |
2655 | socket_port_take_fd(p, fds, fd); | |
ee092817 | 2656 | break; |
80a58668 | 2657 | } |
ee092817 | 2658 | |
a16e1123 | 2659 | } else if (streq(key, "socket")) { |
27ca8d7a | 2660 | int fd, type, skip = 0; |
a16e1123 LP |
2661 | SocketPort *p; |
2662 | ||
27ca8d7a | 2663 | if (sscanf(value, "%i %i %n", &fd, &type, &skip) < 2 || fd < 0 || type < 0 || !fdset_contains(fds, fd)) |
f2341e0a | 2664 | log_unit_debug(u, "Failed to parse socket value: %s", value); |
80a58668 | 2665 | else |
a16e1123 | 2666 | LIST_FOREACH(port, p, s->ports) |
80a58668 ZJS |
2667 | if (socket_address_is(&p->address, value+skip, type)) { |
2668 | socket_port_take_fd(p, fds, fd); | |
a16e1123 | 2669 | break; |
80a58668 | 2670 | } |
a16e1123 | 2671 | |
7a22745a LP |
2672 | } else if (streq(key, "netlink")) { |
2673 | int fd, skip = 0; | |
2674 | SocketPort *p; | |
2675 | ||
2676 | if (sscanf(value, "%i %n", &fd, &skip) < 1 || fd < 0 || !fdset_contains(fds, fd)) | |
f2341e0a | 2677 | log_unit_debug(u, "Failed to parse socket value: %s", value); |
80a58668 | 2678 | else |
7a22745a | 2679 | LIST_FOREACH(port, p, s->ports) |
80a58668 ZJS |
2680 | if (socket_address_is_netlink(&p->address, value+skip)) { |
2681 | socket_port_take_fd(p, fds, fd); | |
7a22745a | 2682 | break; |
80a58668 | 2683 | } |
60252446 PS |
2684 | |
2685 | } else if (streq(key, "ffs")) { | |
2686 | int fd, skip = 0; | |
2687 | SocketPort *p; | |
2688 | ||
2689 | if (sscanf(value, "%i %n", &fd, &skip) < 1 || fd < 0 || !fdset_contains(fds, fd)) | |
2690 | log_unit_debug(u, "Failed to parse ffs value: %s", value); | |
80a58668 | 2691 | else |
60252446 PS |
2692 | LIST_FOREACH(port, p, s->ports) |
2693 | if (p->type == SOCKET_USB_FUNCTION && | |
e3f791a2 | 2694 | path_equal_or_files_same(p->path, value+skip, 0)) { |
80a58668 | 2695 | socket_port_take_fd(p, fds, fd); |
60252446 | 2696 | break; |
80a58668 | 2697 | } |
60252446 | 2698 | |
a16e1123 | 2699 | } else |
f2341e0a | 2700 | log_unit_debug(UNIT(s), "Unknown serialization key: %s", key); |
a16e1123 LP |
2701 | |
2702 | return 0; | |
2703 | } | |
2704 | ||
9ff1a6f1 | 2705 | static void socket_distribute_fds(Unit *u, FDSet *fds) { |
01e10de3 LP |
2706 | Socket *s = SOCKET(u); |
2707 | SocketPort *p; | |
2708 | ||
2709 | assert(u); | |
2710 | ||
2711 | LIST_FOREACH(port, p, s->ports) { | |
2712 | Iterator i; | |
2713 | int fd; | |
2714 | ||
2715 | if (p->type != SOCKET_SOCKET) | |
2716 | continue; | |
2717 | ||
2718 | if (p->fd >= 0) | |
2719 | continue; | |
2720 | ||
2721 | FDSET_FOREACH(fd, fds, i) { | |
2722 | if (socket_address_matches_fd(&p->address, fd)) { | |
2723 | p->fd = fdset_remove(fds, fd); | |
2724 | s->deserialized_state = SOCKET_LISTENING; | |
2725 | break; | |
2726 | } | |
2727 | } | |
2728 | } | |
01e10de3 LP |
2729 | } |
2730 | ||
44a6b1b6 | 2731 | _pure_ static UnitActiveState socket_active_state(Unit *u) { |
87f0e418 | 2732 | assert(u); |
5cb5a6ff | 2733 | |
acbb0225 | 2734 | return state_translation_table[SOCKET(u)->state]; |
5cb5a6ff LP |
2735 | } |
2736 | ||
44a6b1b6 | 2737 | _pure_ static const char *socket_sub_state_to_string(Unit *u) { |
10a94420 LP |
2738 | assert(u); |
2739 | ||
a16e1123 | 2740 | return socket_state_to_string(SOCKET(u)->state); |
10a94420 LP |
2741 | } |
2742 | ||
67419600 OS |
2743 | const char* socket_port_type_to_string(SocketPort *p) { |
2744 | ||
2745 | assert(p); | |
2746 | ||
2747 | switch (p->type) { | |
718db961 LP |
2748 | |
2749 | case SOCKET_SOCKET: | |
2750 | ||
2751 | switch (p->address.type) { | |
2752 | ||
2753 | case SOCK_STREAM: | |
2754 | return "Stream"; | |
2755 | ||
2756 | case SOCK_DGRAM: | |
2757 | return "Datagram"; | |
2758 | ||
2759 | case SOCK_SEQPACKET: | |
2760 | return "SequentialPacket"; | |
2761 | ||
2762 | case SOCK_RAW: | |
2763 | if (socket_address_family(&p->address) == AF_NETLINK) | |
2764 | return "Netlink"; | |
2765 | ||
4831981d | 2766 | _fallthrough_; |
718db961 LP |
2767 | default: |
2768 | return NULL; | |
2769 | } | |
2770 | ||
2771 | case SOCKET_SPECIAL: | |
2772 | return "Special"; | |
2773 | ||
2774 | case SOCKET_MQUEUE: | |
2775 | return "MessageQueue"; | |
2776 | ||
2777 | case SOCKET_FIFO: | |
2778 | return "FIFO"; | |
2779 | ||
60252446 PS |
2780 | case SOCKET_USB_FUNCTION: |
2781 | return "USBFunction"; | |
2782 | ||
718db961 LP |
2783 | default: |
2784 | return NULL; | |
67419600 OS |
2785 | } |
2786 | } | |
2787 | ||
038ed5a4 YW |
2788 | SocketType socket_port_type_from_string(const char *s) { |
2789 | assert(s); | |
2790 | ||
e045e325 YW |
2791 | if (STR_IN_SET(s, "Stream", "Datagram", "SequentialPacket", "Netlink")) |
2792 | return SOCKET_SOCKET; | |
2793 | else if (streq(s, "Special")) | |
2794 | return SOCKET_SPECIAL; | |
2795 | else if (streq(s, "MessageQueue")) | |
2796 | return SOCKET_MQUEUE; | |
2797 | else if (streq(s, "FIFO")) | |
2798 | return SOCKET_FIFO; | |
2799 | else if (streq(s, "USBFunction")) | |
2800 | return SOCKET_USB_FUNCTION; | |
038ed5a4 YW |
2801 | else |
2802 | return _SOCKET_TYPE_INVALID; | |
2803 | } | |
2804 | ||
f2f725e5 | 2805 | _pure_ static bool socket_may_gc(Unit *u) { |
6cf6bbc2 LP |
2806 | Socket *s = SOCKET(u); |
2807 | ||
2808 | assert(u); | |
2809 | ||
f2f725e5 | 2810 | return s->n_connections == 0; |
6cf6bbc2 LP |
2811 | } |
2812 | ||
a79279c7 LP |
2813 | static int socket_accept_do(Socket *s, int fd) { |
2814 | int cfd; | |
2815 | ||
2816 | assert(s); | |
2817 | assert(fd >= 0); | |
2818 | ||
2819 | for (;;) { | |
2820 | cfd = accept4(fd, NULL, NULL, SOCK_NONBLOCK); | |
2821 | if (cfd < 0) { | |
2822 | if (errno == EINTR) | |
2823 | continue; | |
2824 | ||
2825 | return -errno; | |
2826 | } | |
2827 | ||
2828 | break; | |
2829 | } | |
2830 | ||
2831 | return cfd; | |
2832 | } | |
2833 | ||
2834 | static int socket_accept_in_cgroup(Socket *s, SocketPort *p, int fd) { | |
2835 | _cleanup_close_pair_ int pair[2] = { -1, -1 }; | |
2836 | int cfd, r; | |
2837 | pid_t pid; | |
2838 | ||
2839 | assert(s); | |
2840 | assert(p); | |
2841 | assert(fd >= 0); | |
2842 | ||
2843 | /* Similar to socket_address_listen_in_cgroup(), but for accept() rathern than socket(): make sure that any | |
2844 | * connection socket is also properly associated with the cgroup. */ | |
2845 | ||
2846 | if (!IN_SET(p->address.sockaddr.sa.sa_family, AF_INET, AF_INET6)) | |
2847 | goto shortcut; | |
2848 | ||
2849 | r = bpf_firewall_supported(); | |
2850 | if (r < 0) | |
2851 | return r; | |
2ae7ee58 | 2852 | if (r == BPF_FIREWALL_UNSUPPORTED) |
a79279c7 LP |
2853 | goto shortcut; |
2854 | ||
2855 | if (socketpair(AF_UNIX, SOCK_SEQPACKET|SOCK_CLOEXEC, 0, pair) < 0) | |
2856 | return log_unit_error_errno(UNIT(s), errno, "Failed to create communication channel: %m"); | |
2857 | ||
4c253ed1 | 2858 | r = unit_fork_helper_process(UNIT(s), "(sd-accept)", &pid); |
a79279c7 LP |
2859 | if (r < 0) |
2860 | return log_unit_error_errno(UNIT(s), r, "Failed to fork off accept stub process: %m"); | |
2861 | if (r == 0) { | |
2862 | /* Child */ | |
2863 | ||
2864 | pair[0] = safe_close(pair[0]); | |
2865 | ||
2866 | cfd = socket_accept_do(s, fd); | |
2867 | if (cfd < 0) { | |
2868 | log_unit_error_errno(UNIT(s), cfd, "Failed to accept connection socket: %m"); | |
2869 | _exit(EXIT_FAILURE); | |
2870 | } | |
2871 | ||
2872 | r = send_one_fd(pair[1], cfd, 0); | |
2873 | if (r < 0) { | |
2874 | log_unit_error_errno(UNIT(s), r, "Failed to send connection socket to parent: %m"); | |
2875 | _exit(EXIT_FAILURE); | |
2876 | } | |
2877 | ||
2878 | _exit(EXIT_SUCCESS); | |
2879 | } | |
2880 | ||
2881 | pair[1] = safe_close(pair[1]); | |
2882 | cfd = receive_one_fd(pair[0], 0); | |
2883 | ||
2884 | /* We synchronously wait for the helper, as it shouldn't be slow */ | |
d2e0ac3d | 2885 | r = wait_for_terminate_and_check("(sd-accept)", pid, WAIT_LOG_ABNORMAL); |
a79279c7 LP |
2886 | if (r < 0) { |
2887 | safe_close(cfd); | |
2888 | return r; | |
2889 | } | |
2890 | ||
2891 | if (cfd < 0) | |
2892 | return log_unit_error_errno(UNIT(s), cfd, "Failed to receive connection socket: %m"); | |
2893 | ||
2894 | return cfd; | |
2895 | ||
2896 | shortcut: | |
2897 | cfd = socket_accept_do(s, fd); | |
2898 | if (cfd < 0) | |
2899 | return log_unit_error_errno(UNIT(s), cfd, "Failed to accept connection socket: %m"); | |
2900 | ||
2901 | return cfd; | |
2902 | } | |
2903 | ||
718db961 LP |
2904 | static int socket_dispatch_io(sd_event_source *source, int fd, uint32_t revents, void *userdata) { |
2905 | SocketPort *p = userdata; | |
4f2d528d | 2906 | int cfd = -1; |
9152c765 | 2907 | |
718db961 | 2908 | assert(p); |
8d567588 | 2909 | assert(fd >= 0); |
9152c765 | 2910 | |
718db961 LP |
2911 | if (p->socket->state != SOCKET_LISTENING) |
2912 | return 0; | |
871d7de4 | 2913 | |
f2341e0a | 2914 | log_unit_debug(UNIT(p->socket), "Incoming traffic"); |
9152c765 | 2915 | |
718db961 | 2916 | if (revents != EPOLLIN) { |
641e01dc | 2917 | |
718db961 | 2918 | if (revents & EPOLLHUP) |
f2341e0a | 2919 | 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 | 2920 | else |
f2341e0a | 2921 | log_unit_error(UNIT(p->socket), "Got unexpected poll event (0x%x) on socket.", revents); |
8d567588 | 2922 | goto fail; |
4f2d528d LP |
2923 | } |
2924 | ||
718db961 LP |
2925 | if (p->socket->accept && |
2926 | p->type == SOCKET_SOCKET && | |
2927 | socket_address_can_accept(&p->address)) { | |
2928 | ||
a79279c7 LP |
2929 | cfd = socket_accept_in_cgroup(p->socket, p, fd); |
2930 | if (cfd < 0) | |
2931 | goto fail; | |
4fd5948e | 2932 | |
718db961 | 2933 | socket_apply_socket_options(p->socket, cfd); |
4f2d528d | 2934 | } |
9152c765 | 2935 | |
718db961 LP |
2936 | socket_enter_running(p->socket, cfd); |
2937 | return 0; | |
8d567588 LP |
2938 | |
2939 | fail: | |
718db961 LP |
2940 | socket_enter_stop_pre(p->socket, SOCKET_FAILURE_RESOURCES); |
2941 | return 0; | |
9152c765 LP |
2942 | } |
2943 | ||
87f0e418 LP |
2944 | static void socket_sigchld_event(Unit *u, pid_t pid, int code, int status) { |
2945 | Socket *s = SOCKET(u); | |
cfc4eb4c | 2946 | SocketResult f; |
5cb5a6ff LP |
2947 | |
2948 | assert(s); | |
034c6ed7 | 2949 | assert(pid >= 0); |
5cb5a6ff | 2950 | |
8c47c732 LP |
2951 | if (pid != s->control_pid) |
2952 | return; | |
542563ba | 2953 | |
034c6ed7 LP |
2954 | s->control_pid = 0; |
2955 | ||
1f0958f6 | 2956 | if (is_clean_exit(code, status, EXIT_CLEAN_COMMAND, NULL)) |
cfc4eb4c LP |
2957 | f = SOCKET_SUCCESS; |
2958 | else if (code == CLD_EXITED) | |
2959 | f = SOCKET_FAILURE_EXIT_CODE; | |
2960 | else if (code == CLD_KILLED) | |
2961 | f = SOCKET_FAILURE_SIGNAL; | |
2962 | else if (code == CLD_DUMPED) | |
2963 | f = SOCKET_FAILURE_CORE_DUMP; | |
2964 | else | |
a4152e3f | 2965 | assert_not_reached("Unknown sigchld code"); |
8c47c732 | 2966 | |
b708e7ce | 2967 | if (s->control_command) { |
6ea832a2 | 2968 | exec_status_exit(&s->control_command->exec_status, &s->exec_context, pid, code, status); |
a16e1123 | 2969 | |
3ed0cd26 | 2970 | if (s->control_command->flags & EXEC_COMMAND_IGNORE_FAILURE) |
cfc4eb4c | 2971 | f = SOCKET_SUCCESS; |
b708e7ce LP |
2972 | } |
2973 | ||
f2341e0a LP |
2974 | log_unit_full(u, f == SOCKET_SUCCESS ? LOG_DEBUG : LOG_NOTICE, 0, |
2975 | "Control process exited, code=%s status=%i", | |
2976 | sigchld_code_to_string(code), status); | |
034c6ed7 | 2977 | |
a0fef983 | 2978 | if (s->result == SOCKET_SUCCESS) |
cfc4eb4c LP |
2979 | s->result = f; |
2980 | ||
2981 | if (s->control_command && | |
2982 | s->control_command->command_next && | |
2983 | f == SOCKET_SUCCESS) { | |
2984 | ||
f2341e0a | 2985 | log_unit_debug(u, "Running next command for state %s", socket_state_to_string(s->state)); |
cfc4eb4c | 2986 | socket_run_next(s); |
acbb0225 | 2987 | } else { |
a16e1123 LP |
2988 | s->control_command = NULL; |
2989 | s->control_command_id = _SOCKET_EXEC_COMMAND_INVALID; | |
2990 | ||
034c6ed7 LP |
2991 | /* No further commands for this step, so let's figure |
2992 | * out what to do next */ | |
5cb5a6ff | 2993 | |
f2341e0a | 2994 | log_unit_debug(u, "Got final SIGCHLD for state %s", socket_state_to_string(s->state)); |
acbb0225 | 2995 | |
034c6ed7 LP |
2996 | switch (s->state) { |
2997 | ||
2998 | case SOCKET_START_PRE: | |
cfc4eb4c | 2999 | if (f == SOCKET_SUCCESS) |
3900e5fd | 3000 | socket_enter_start_chown(s); |
034c6ed7 | 3001 | else |
cfc4eb4c | 3002 | socket_enter_signal(s, SOCKET_FINAL_SIGTERM, f); |
034c6ed7 LP |
3003 | break; |
3004 | ||
3900e5fd LP |
3005 | case SOCKET_START_CHOWN: |
3006 | if (f == SOCKET_SUCCESS) | |
3007 | socket_enter_start_post(s); | |
3008 | else | |
3009 | socket_enter_stop_pre(s, f); | |
3010 | break; | |
3011 | ||
034c6ed7 | 3012 | case SOCKET_START_POST: |
cfc4eb4c | 3013 | if (f == SOCKET_SUCCESS) |
e9af15c3 | 3014 | socket_enter_listening(s); |
034c6ed7 | 3015 | else |
cfc4eb4c | 3016 | socket_enter_stop_pre(s, f); |
034c6ed7 LP |
3017 | break; |
3018 | ||
3019 | case SOCKET_STOP_PRE: | |
3020 | case SOCKET_STOP_PRE_SIGTERM: | |
3021 | case SOCKET_STOP_PRE_SIGKILL: | |
cfc4eb4c | 3022 | socket_enter_stop_post(s, f); |
034c6ed7 LP |
3023 | break; |
3024 | ||
3025 | case SOCKET_STOP_POST: | |
80876c20 LP |
3026 | case SOCKET_FINAL_SIGTERM: |
3027 | case SOCKET_FINAL_SIGKILL: | |
cfc4eb4c | 3028 | socket_enter_dead(s, f); |
034c6ed7 LP |
3029 | break; |
3030 | ||
3031 | default: | |
3032 | assert_not_reached("Uh, control process died at wrong time."); | |
3033 | } | |
3034 | } | |
c4e2ceae LP |
3035 | |
3036 | /* Notify clients about changed exit status */ | |
3037 | unit_add_to_dbus_queue(u); | |
034c6ed7 | 3038 | } |
5cb5a6ff | 3039 | |
718db961 LP |
3040 | static int socket_dispatch_timer(sd_event_source *source, usec_t usec, void *userdata) { |
3041 | Socket *s = SOCKET(userdata); | |
5cb5a6ff | 3042 | |
034c6ed7 | 3043 | assert(s); |
718db961 | 3044 | assert(s->timer_event_source == source); |
034c6ed7 LP |
3045 | |
3046 | switch (s->state) { | |
3047 | ||
3048 | case SOCKET_START_PRE: | |
f2341e0a | 3049 | log_unit_warning(UNIT(s), "Starting timed out. Terminating."); |
cfc4eb4c | 3050 | socket_enter_signal(s, SOCKET_FINAL_SIGTERM, SOCKET_FAILURE_TIMEOUT); |
da19d5c1 | 3051 | break; |
80876c20 | 3052 | |
3900e5fd | 3053 | case SOCKET_START_CHOWN: |
034c6ed7 | 3054 | case SOCKET_START_POST: |
f2341e0a | 3055 | log_unit_warning(UNIT(s), "Starting timed out. Stopping."); |
cfc4eb4c | 3056 | socket_enter_stop_pre(s, SOCKET_FAILURE_TIMEOUT); |
034c6ed7 LP |
3057 | break; |
3058 | ||
3059 | case SOCKET_STOP_PRE: | |
f2341e0a | 3060 | log_unit_warning(UNIT(s), "Stopping timed out. Terminating."); |
cfc4eb4c | 3061 | socket_enter_signal(s, SOCKET_STOP_PRE_SIGTERM, SOCKET_FAILURE_TIMEOUT); |
034c6ed7 LP |
3062 | break; |
3063 | ||
3064 | case SOCKET_STOP_PRE_SIGTERM: | |
4819ff03 | 3065 | if (s->kill_context.send_sigkill) { |
f2341e0a | 3066 | log_unit_warning(UNIT(s), "Stopping timed out. Killing."); |
cfc4eb4c | 3067 | socket_enter_signal(s, SOCKET_STOP_PRE_SIGKILL, SOCKET_FAILURE_TIMEOUT); |
ba035df2 | 3068 | } else { |
f2341e0a | 3069 | log_unit_warning(UNIT(s), "Stopping timed out. Skipping SIGKILL. Ignoring."); |
cfc4eb4c | 3070 | socket_enter_stop_post(s, SOCKET_FAILURE_TIMEOUT); |
ba035df2 | 3071 | } |
034c6ed7 LP |
3072 | break; |
3073 | ||
3074 | case SOCKET_STOP_PRE_SIGKILL: | |
f2341e0a | 3075 | log_unit_warning(UNIT(s), "Processes still around after SIGKILL. Ignoring."); |
cfc4eb4c | 3076 | socket_enter_stop_post(s, SOCKET_FAILURE_TIMEOUT); |
034c6ed7 LP |
3077 | break; |
3078 | ||
3079 | case SOCKET_STOP_POST: | |
f2341e0a | 3080 | log_unit_warning(UNIT(s), "Stopping timed out (2). Terminating."); |
cfc4eb4c | 3081 | socket_enter_signal(s, SOCKET_FINAL_SIGTERM, SOCKET_FAILURE_TIMEOUT); |
034c6ed7 LP |
3082 | break; |
3083 | ||
80876c20 | 3084 | case SOCKET_FINAL_SIGTERM: |
4819ff03 | 3085 | if (s->kill_context.send_sigkill) { |
f2341e0a | 3086 | log_unit_warning(UNIT(s), "Stopping timed out (2). Killing."); |
cfc4eb4c | 3087 | socket_enter_signal(s, SOCKET_FINAL_SIGKILL, SOCKET_FAILURE_TIMEOUT); |
ba035df2 | 3088 | } else { |
f2341e0a | 3089 | log_unit_warning(UNIT(s), "Stopping timed out (2). Skipping SIGKILL. Ignoring."); |
cfc4eb4c | 3090 | socket_enter_dead(s, SOCKET_FAILURE_TIMEOUT); |
ba035df2 | 3091 | } |
034c6ed7 LP |
3092 | break; |
3093 | ||
80876c20 | 3094 | case SOCKET_FINAL_SIGKILL: |
f2341e0a | 3095 | log_unit_warning(UNIT(s), "Still around after SIGKILL (2). Entering failed mode."); |
cfc4eb4c | 3096 | socket_enter_dead(s, SOCKET_FAILURE_TIMEOUT); |
034c6ed7 LP |
3097 | break; |
3098 | ||
3099 | default: | |
3100 | assert_not_reached("Timeout at wrong time."); | |
3101 | } | |
718db961 LP |
3102 | |
3103 | return 0; | |
5cb5a6ff LP |
3104 | } |
3105 | ||
79c7626d | 3106 | int socket_collect_fds(Socket *s, int **fds) { |
da6053d0 | 3107 | size_t k = 0, n = 0; |
44d8db9e | 3108 | SocketPort *p; |
da6053d0 | 3109 | int *rfds; |
44d8db9e LP |
3110 | |
3111 | assert(s); | |
3112 | assert(fds); | |
44d8db9e LP |
3113 | |
3114 | /* Called from the service code for requesting our fds */ | |
3115 | ||
15087cdb | 3116 | LIST_FOREACH(port, p, s->ports) { |
44d8db9e | 3117 | if (p->fd >= 0) |
79c7626d LP |
3118 | n++; |
3119 | n += p->n_auxiliary_fds; | |
15087cdb | 3120 | } |
44d8db9e | 3121 | |
79c7626d | 3122 | if (n <= 0) { |
de3756ab | 3123 | *fds = NULL; |
de3756ab LP |
3124 | return 0; |
3125 | } | |
3126 | ||
79c7626d | 3127 | rfds = new(int, n); |
e5403f09 | 3128 | if (!rfds) |
44d8db9e LP |
3129 | return -ENOMEM; |
3130 | ||
15087cdb | 3131 | LIST_FOREACH(port, p, s->ports) { |
da6053d0 | 3132 | size_t i; |
79c7626d | 3133 | |
44d8db9e LP |
3134 | if (p->fd >= 0) |
3135 | rfds[k++] = p->fd; | |
15087cdb PS |
3136 | for (i = 0; i < p->n_auxiliary_fds; ++i) |
3137 | rfds[k++] = p->auxiliary_fds[i]; | |
3138 | } | |
44d8db9e | 3139 | |
79c7626d | 3140 | assert(k == n); |
44d8db9e LP |
3141 | |
3142 | *fds = rfds; | |
da6053d0 | 3143 | return (int) n; |
44d8db9e LP |
3144 | } |
3145 | ||
e821075a LP |
3146 | static void socket_reset_failed(Unit *u) { |
3147 | Socket *s = SOCKET(u); | |
3148 | ||
3149 | assert(s); | |
3150 | ||
3151 | if (s->state == SOCKET_FAILED) | |
3152 | socket_set_state(s, SOCKET_DEAD); | |
3153 | ||
3154 | s->result = SOCKET_SUCCESS; | |
3155 | } | |
3156 | ||
6cf6bbc2 LP |
3157 | void socket_connection_unref(Socket *s) { |
3158 | assert(s); | |
3159 | ||
3160 | /* The service is dead. Yay! | |
3161 | * | |
35b8ca3a | 3162 | * This is strictly for one-instance-per-connection |
6cf6bbc2 LP |
3163 | * services. */ |
3164 | ||
3165 | assert(s->n_connections > 0); | |
3166 | s->n_connections--; | |
3167 | ||
f2341e0a | 3168 | log_unit_debug(UNIT(s), "One connection closed, %u left.", s->n_connections); |
5632e374 LP |
3169 | } |
3170 | ||
d137a488 UTL |
3171 | static void socket_trigger_notify(Unit *u, Unit *other) { |
3172 | Socket *s = SOCKET(u); | |
d137a488 UTL |
3173 | |
3174 | assert(u); | |
3175 | assert(other); | |
3176 | ||
d14e3a0d LP |
3177 | /* Filter out invocations with bogus state */ |
3178 | if (other->load_state != UNIT_LOADED || other->type != UNIT_SERVICE) | |
3179 | return; | |
3180 | ||
3181 | /* Don't propagate state changes from the service if we are already down */ | |
3182 | if (!IN_SET(s->state, SOCKET_RUNNING, SOCKET_LISTENING)) | |
d137a488 UTL |
3183 | return; |
3184 | ||
d14e3a0d LP |
3185 | /* We don't care for the service state if we are in Accept=yes mode */ |
3186 | if (s->accept) | |
3187 | return; | |
3188 | ||
3189 | /* Propagate start limit hit state */ | |
6bf0f408 LP |
3190 | if (other->start_limit_hit) { |
3191 | socket_enter_stop_pre(s, SOCKET_FAILURE_SERVICE_START_LIMIT_HIT); | |
d137a488 | 3192 | return; |
6bf0f408 | 3193 | } |
d137a488 | 3194 | |
d14e3a0d LP |
3195 | /* Don't propagate anything if there's still a job queued */ |
3196 | if (other->job) | |
6bf0f408 | 3197 | return; |
d137a488 | 3198 | |
6bf0f408 LP |
3199 | if (IN_SET(SERVICE(other)->state, |
3200 | SERVICE_DEAD, SERVICE_FAILED, | |
3201 | SERVICE_FINAL_SIGTERM, SERVICE_FINAL_SIGKILL, | |
3202 | SERVICE_AUTO_RESTART)) | |
3203 | socket_enter_listening(s); | |
d137a488 | 3204 | |
6bf0f408 | 3205 | if (SERVICE(other)->state == SERVICE_RUNNING) |
d137a488 UTL |
3206 | socket_set_state(s, SOCKET_RUNNING); |
3207 | } | |
3208 | ||
718db961 | 3209 | static int socket_kill(Unit *u, KillWho who, int signo, sd_bus_error *error) { |
814cc562 | 3210 | return unit_kill_common(u, who, signo, -1, SOCKET(u)->control_pid, error); |
8a0867d6 LP |
3211 | } |
3212 | ||
7a7821c8 | 3213 | static int socket_get_timeout(Unit *u, usec_t *timeout) { |
68db7a3b | 3214 | Socket *s = SOCKET(u); |
7a7821c8 | 3215 | usec_t t; |
68db7a3b ZJS |
3216 | int r; |
3217 | ||
3218 | if (!s->timer_event_source) | |
3219 | return 0; | |
3220 | ||
7a7821c8 | 3221 | r = sd_event_source_get_time(s->timer_event_source, &t); |
68db7a3b ZJS |
3222 | if (r < 0) |
3223 | return r; | |
7a7821c8 LP |
3224 | if (t == USEC_INFINITY) |
3225 | return 0; | |
68db7a3b | 3226 | |
7a7821c8 | 3227 | *timeout = t; |
68db7a3b ZJS |
3228 | return 1; |
3229 | } | |
3230 | ||
8dd4c05b LP |
3231 | char *socket_fdname(Socket *s) { |
3232 | assert(s); | |
3233 | ||
3234 | /* Returns the name to use for $LISTEN_NAMES. If the user | |
3235 | * didn't specify anything specifically, use the socket unit's | |
3236 | * name as fallback. */ | |
3237 | ||
84500122 | 3238 | return s->fdname ?: UNIT(s)->id; |
8dd4c05b LP |
3239 | } |
3240 | ||
291d565a LP |
3241 | static int socket_control_pid(Unit *u) { |
3242 | Socket *s = SOCKET(u); | |
3243 | ||
3244 | assert(s); | |
3245 | ||
3246 | return s->control_pid; | |
3247 | } | |
3248 | ||
a16e1123 | 3249 | static const char* const socket_exec_command_table[_SOCKET_EXEC_COMMAND_MAX] = { |
836bb1cd YW |
3250 | [SOCKET_EXEC_START_PRE] = "ExecStartPre", |
3251 | [SOCKET_EXEC_START_CHOWN] = "ExecStartChown", | |
3252 | [SOCKET_EXEC_START_POST] = "ExecStartPost", | |
3253 | [SOCKET_EXEC_STOP_PRE] = "ExecStopPre", | |
3254 | [SOCKET_EXEC_STOP_POST] = "ExecStopPost" | |
a16e1123 LP |
3255 | }; |
3256 | ||
3257 | DEFINE_STRING_TABLE_LOOKUP(socket_exec_command, SocketExecCommand); | |
3258 | ||
cfc4eb4c LP |
3259 | static const char* const socket_result_table[_SOCKET_RESULT_MAX] = { |
3260 | [SOCKET_SUCCESS] = "success", | |
3261 | [SOCKET_FAILURE_RESOURCES] = "resources", | |
3262 | [SOCKET_FAILURE_TIMEOUT] = "timeout", | |
3263 | [SOCKET_FAILURE_EXIT_CODE] = "exit-code", | |
3264 | [SOCKET_FAILURE_SIGNAL] = "signal", | |
c2f34808 | 3265 | [SOCKET_FAILURE_CORE_DUMP] = "core-dump", |
07299350 | 3266 | [SOCKET_FAILURE_START_LIMIT_HIT] = "start-limit-hit", |
8b26cdbd | 3267 | [SOCKET_FAILURE_TRIGGER_LIMIT_HIT] = "trigger-limit-hit", |
6bf0f408 | 3268 | [SOCKET_FAILURE_SERVICE_START_LIMIT_HIT] = "service-start-limit-hit" |
cfc4eb4c LP |
3269 | }; |
3270 | ||
3271 | DEFINE_STRING_TABLE_LOOKUP(socket_result, SocketResult); | |
3272 | ||
87f0e418 | 3273 | const UnitVTable socket_vtable = { |
7d17cfbc | 3274 | .object_size = sizeof(Socket), |
718db961 LP |
3275 | .exec_context_offset = offsetof(Socket, exec_context), |
3276 | .cgroup_context_offset = offsetof(Socket, cgroup_context), | |
3277 | .kill_context_offset = offsetof(Socket, kill_context), | |
613b411c | 3278 | .exec_runtime_offset = offsetof(Socket, exec_runtime), |
29206d46 | 3279 | .dynamic_creds_offset = offsetof(Socket, dynamic_creds), |
3ef63c31 | 3280 | |
f975e971 LP |
3281 | .sections = |
3282 | "Unit\0" | |
3283 | "Socket\0" | |
3284 | "Install\0", | |
4ad49000 | 3285 | .private_section = "Socket", |
71645aca | 3286 | |
9c0320e7 YW |
3287 | .can_transient = true, |
3288 | ||
034c6ed7 LP |
3289 | .init = socket_init, |
3290 | .done = socket_done, | |
a16e1123 LP |
3291 | .load = socket_load, |
3292 | ||
3293 | .coldplug = socket_coldplug, | |
034c6ed7 | 3294 | |
5cb5a6ff LP |
3295 | .dump = socket_dump, |
3296 | ||
542563ba LP |
3297 | .start = socket_start, |
3298 | .stop = socket_stop, | |
5cb5a6ff | 3299 | |
718db961 LP |
3300 | .kill = socket_kill, |
3301 | ||
68db7a3b ZJS |
3302 | .get_timeout = socket_get_timeout, |
3303 | ||
a16e1123 LP |
3304 | .serialize = socket_serialize, |
3305 | .deserialize_item = socket_deserialize_item, | |
01e10de3 | 3306 | .distribute_fds = socket_distribute_fds, |
a16e1123 | 3307 | |
5cb5a6ff | 3308 | .active_state = socket_active_state, |
10a94420 | 3309 | .sub_state_to_string = socket_sub_state_to_string, |
5cb5a6ff | 3310 | |
f2f725e5 | 3311 | .may_gc = socket_may_gc, |
6cf6bbc2 | 3312 | |
034c6ed7 | 3313 | .sigchld_event = socket_sigchld_event, |
4139c1b2 | 3314 | |
d137a488 UTL |
3315 | .trigger_notify = socket_trigger_notify, |
3316 | ||
fdf20a31 | 3317 | .reset_failed = socket_reset_failed, |
5632e374 | 3318 | |
291d565a LP |
3319 | .control_pid = socket_control_pid, |
3320 | ||
718db961 | 3321 | .bus_vtable = bus_socket_vtable, |
74c964d3 LP |
3322 | .bus_set_property = bus_socket_set_property, |
3323 | .bus_commit_properties = bus_socket_commit_properties, | |
c6918296 MS |
3324 | |
3325 | .status_message_formats = { | |
3326 | /*.starting_stopping = { | |
3327 | [0] = "Starting socket %s...", | |
3328 | [1] = "Stopping socket %s...", | |
3329 | },*/ | |
3330 | .finished_start_job = { | |
3331 | [JOB_DONE] = "Listening on %s.", | |
3332 | [JOB_FAILED] = "Failed to listen on %s.", | |
c6918296 MS |
3333 | [JOB_TIMEOUT] = "Timed out starting %s.", |
3334 | }, | |
3335 | .finished_stop_job = { | |
3336 | [JOB_DONE] = "Closed %s.", | |
3337 | [JOB_FAILED] = "Failed stopping %s.", | |
3338 | [JOB_TIMEOUT] = "Timed out stopping %s.", | |
3339 | }, | |
3340 | }, | |
5cb5a6ff | 3341 | }; |