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db9ecf05 | 1 | /* SPDX-License-Identifier: LGPL-2.1-or-later */ |
a7334b09 | 2 | |
e8da24a6 | 3 | #include <arpa/inet.h> |
83c60c9f LP |
4 | #include <errno.h> |
5 | #include <fcntl.h> | |
916abb21 | 6 | #include <mqueue.h> |
e8da24a6 | 7 | #include <netinet/tcp.h> |
e8da24a6 LP |
8 | #include <sys/epoll.h> |
9 | #include <sys/stat.h> | |
10 | #include <unistd.h> | |
62bc4efc | 11 | #include <linux/sctp.h> |
83c60c9f | 12 | |
b5efdb8a | 13 | #include "alloc-util.h" |
a79279c7 | 14 | #include "bpf-firewall.h" |
e8da24a6 LP |
15 | #include "bus-error.h" |
16 | #include "bus-util.h" | |
f461a28d | 17 | #include "chase.h" |
28db6fbf | 18 | #include "constants.h" |
e8da24a6 LP |
19 | #include "copy.h" |
20 | #include "dbus-socket.h" | |
6fcbec6f | 21 | #include "dbus-unit.h" |
86e045ec | 22 | #include "errno-list.h" |
e8da24a6 | 23 | #include "exit-status.h" |
3ffd4af2 | 24 | #include "fd-util.h" |
f97b34a6 | 25 | #include "format-util.h" |
a79279c7 | 26 | #include "in-addr-util.h" |
60d9771c | 27 | #include "io-util.h" |
da96ad5a | 28 | #include "ip-protocol-list.h" |
0690160e | 29 | #include "label-util.h" |
83c60c9f | 30 | #include "log.h" |
35cd0ba5 | 31 | #include "mkdir-label.h" |
6bedfcbb | 32 | #include "parse-util.h" |
9eb977db | 33 | #include "path-util.h" |
7b3e062c | 34 | #include "process-util.h" |
d7b8eec7 | 35 | #include "selinux-util.h" |
d68c645b | 36 | #include "serialize.h" |
a243128d | 37 | #include "service.h" |
24882e06 | 38 | #include "signal-util.h" |
e8da24a6 | 39 | #include "smack-util.h" |
d68c645b | 40 | #include "socket.h" |
5c3fa98d | 41 | #include "socket-netlink.h" |
e8da24a6 | 42 | #include "special.h" |
8b43440b | 43 | #include "string-table.h" |
07630cea | 44 | #include "string-util.h" |
e8da24a6 LP |
45 | #include "strv.h" |
46 | #include "unit-name.h" | |
e8da24a6 | 47 | #include "unit.h" |
b1d4f8e1 | 48 | #include "user-util.h" |
83c60c9f | 49 | |
166cf510 ZJS |
50 | struct SocketPeer { |
51 | unsigned n_ref; | |
52 | ||
53 | Socket *socket; | |
54 | union sockaddr_union peer; | |
41733ae1 | 55 | socklen_t peer_salen; |
166cf510 ZJS |
56 | }; |
57 | ||
acbb0225 | 58 | static const UnitActiveState state_translation_table[_SOCKET_STATE_MAX] = { |
87f0e418 LP |
59 | [SOCKET_DEAD] = UNIT_INACTIVE, |
60 | [SOCKET_START_PRE] = UNIT_ACTIVATING, | |
3900e5fd | 61 | [SOCKET_START_CHOWN] = UNIT_ACTIVATING, |
87f0e418 LP |
62 | [SOCKET_START_POST] = UNIT_ACTIVATING, |
63 | [SOCKET_LISTENING] = UNIT_ACTIVE, | |
64 | [SOCKET_RUNNING] = UNIT_ACTIVE, | |
65 | [SOCKET_STOP_PRE] = UNIT_DEACTIVATING, | |
66 | [SOCKET_STOP_PRE_SIGTERM] = UNIT_DEACTIVATING, | |
67 | [SOCKET_STOP_PRE_SIGKILL] = UNIT_DEACTIVATING, | |
68 | [SOCKET_STOP_POST] = UNIT_DEACTIVATING, | |
80876c20 LP |
69 | [SOCKET_FINAL_SIGTERM] = UNIT_DEACTIVATING, |
70 | [SOCKET_FINAL_SIGKILL] = UNIT_DEACTIVATING, | |
c968d76a YW |
71 | [SOCKET_FAILED] = UNIT_FAILED, |
72 | [SOCKET_CLEANING] = UNIT_MAINTENANCE, | |
83c60c9f | 73 | }; |
5cb5a6ff | 74 | |
718db961 LP |
75 | static int socket_dispatch_io(sd_event_source *source, int fd, uint32_t revents, void *userdata); |
76 | static int socket_dispatch_timer(sd_event_source *source, usec_t usec, void *userdata); | |
3e5f04bf | 77 | static void flush_ports(Socket *s); |
718db961 | 78 | |
a16e1123 LP |
79 | static void socket_init(Unit *u) { |
80 | Socket *s = SOCKET(u); | |
81 | ||
82 | assert(u); | |
ac155bb8 | 83 | assert(u->load_state == UNIT_STUB); |
a16e1123 | 84 | |
768fcd77 | 85 | s->backlog = SOMAXCONN_DELUXE; |
c9e120e0 | 86 | s->timeout_usec = u->manager->defaults.timeout_start_usec; |
a16e1123 | 87 | s->directory_mode = 0755; |
9131f660 | 88 | s->socket_mode = 0666; |
a16e1123 | 89 | |
6cf6bbc2 LP |
90 | s->max_connections = 64; |
91 | ||
4fd5948e | 92 | s->priority = -1; |
4fd5948e LP |
93 | s->ip_tos = -1; |
94 | s->ip_ttl = -1; | |
4fd5948e | 95 | s->mark = -1; |
4fd5948e | 96 | |
c9e120e0 LP |
97 | s->exec_context.std_output = u->manager->defaults.std_output; |
98 | s->exec_context.std_error = u->manager->defaults.std_error; | |
085afe36 | 99 | |
43a19142 | 100 | s->control_pid = PIDREF_NULL; |
a16e1123 | 101 | s->control_command_id = _SOCKET_EXEC_COMMAND_INVALID; |
8b26cdbd | 102 | |
1f15ce28 | 103 | s->trigger_limit.interval = USEC_INFINITY; |
f5fbe71d | 104 | s->trigger_limit.burst = UINT_MAX; |
2bec84e7 LP |
105 | |
106 | s->poll_limit_interval = USEC_INFINITY; | |
107 | s->poll_limit_burst = UINT_MAX; | |
a16e1123 | 108 | } |
acbb0225 | 109 | |
5e94833f LP |
110 | static void socket_unwatch_control_pid(Socket *s) { |
111 | assert(s); | |
112 | ||
43a19142 | 113 | if (!pidref_is_set(&s->control_pid)) |
5e94833f LP |
114 | return; |
115 | ||
43a19142 LP |
116 | unit_unwatch_pid(UNIT(s), s->control_pid.pid); |
117 | pidref_done(&s->control_pid); | |
5e94833f LP |
118 | } |
119 | ||
15087cdb | 120 | static void socket_cleanup_fd_list(SocketPort *p) { |
3ffd4af2 | 121 | assert(p); |
15087cdb | 122 | |
3ffd4af2 | 123 | close_many(p->auxiliary_fds, p->n_auxiliary_fds); |
15087cdb PS |
124 | p->auxiliary_fds = mfree(p->auxiliary_fds); |
125 | p->n_auxiliary_fds = 0; | |
126 | } | |
127 | ||
f8b21a08 FS |
128 | SocketPort *socket_port_free(SocketPort *p) { |
129 | if (!p) | |
130 | return NULL; | |
131 | ||
132 | sd_event_source_unref(p->event_source); | |
133 | ||
134 | socket_cleanup_fd_list(p); | |
135 | safe_close(p->fd); | |
136 | free(p->path); | |
137 | ||
138 | return mfree(p); | |
139 | } | |
140 | ||
74051b9b | 141 | void socket_free_ports(Socket *s) { |
034c6ed7 LP |
142 | assert(s); |
143 | ||
9aad490e | 144 | LIST_CLEAR(port, s->ports, socket_port_free); |
74051b9b LP |
145 | } |
146 | ||
147 | static void socket_done(Unit *u) { | |
148 | Socket *s = SOCKET(u); | |
9d565427 | 149 | SocketPeer *p; |
74051b9b LP |
150 | |
151 | assert(s); | |
152 | ||
153 | socket_free_ports(s); | |
034c6ed7 | 154 | |
9a73653c | 155 | while ((p = set_steal_first(s->peers_by_address))) |
9d565427 SS |
156 | p->socket = NULL; |
157 | ||
9a73653c | 158 | s->peers_by_address = set_free(s->peers_by_address); |
9d565427 | 159 | |
28135da3 | 160 | s->exec_runtime = exec_runtime_free(s->exec_runtime); |
e537352b | 161 | exec_command_free_array(s->exec_command, _SOCKET_EXEC_COMMAND_MAX); |
034c6ed7 LP |
162 | s->control_command = NULL; |
163 | ||
5e94833f | 164 | socket_unwatch_control_pid(s); |
034c6ed7 | 165 | |
57020a3a | 166 | unit_ref_unset(&s->service); |
034c6ed7 | 167 | |
a1e58e8e LP |
168 | s->tcp_congestion = mfree(s->tcp_congestion); |
169 | s->bind_to_device = mfree(s->bind_to_device); | |
acbb0225 | 170 | |
0a78712e DM |
171 | s->smack = mfree(s->smack); |
172 | s->smack_ip_in = mfree(s->smack_ip_in); | |
173 | s->smack_ip_out = mfree(s->smack_ip_out); | |
0eb59ccf | 174 | |
811ba7a0 LP |
175 | strv_free(s->symlinks); |
176 | ||
0a78712e DM |
177 | s->user = mfree(s->user); |
178 | s->group = mfree(s->group); | |
3900e5fd | 179 | |
a97b23d6 DM |
180 | s->fdname = mfree(s->fdname); |
181 | ||
5dcadb4c | 182 | s->timer_event_source = sd_event_source_disable_unref(s->timer_event_source); |
718db961 LP |
183 | } |
184 | ||
36c16a7c | 185 | static int socket_arm_timer(Socket *s, usec_t usec) { |
718db961 LP |
186 | int r; |
187 | ||
188 | assert(s); | |
189 | ||
718db961 | 190 | if (s->timer_event_source) { |
36c16a7c | 191 | r = sd_event_source_set_time(s->timer_event_source, usec); |
718db961 LP |
192 | if (r < 0) |
193 | return r; | |
194 | ||
195 | return sd_event_source_set_enabled(s->timer_event_source, SD_EVENT_ONESHOT); | |
196 | } | |
197 | ||
36c16a7c LP |
198 | if (usec == USEC_INFINITY) |
199 | return 0; | |
200 | ||
7dfbe2e3 | 201 | r = sd_event_add_time( |
6a0f1f6d LP |
202 | UNIT(s)->manager->event, |
203 | &s->timer_event_source, | |
204 | CLOCK_MONOTONIC, | |
36c16a7c | 205 | usec, 0, |
6a0f1f6d | 206 | socket_dispatch_timer, s); |
7dfbe2e3 TG |
207 | if (r < 0) |
208 | return r; | |
209 | ||
210 | (void) sd_event_source_set_description(s->timer_event_source, "socket-timer"); | |
211 | ||
212 | return 0; | |
5cb5a6ff LP |
213 | } |
214 | ||
4f2d528d | 215 | static bool have_non_accept_socket(Socket *s) { |
4f2d528d LP |
216 | assert(s); |
217 | ||
218 | if (!s->accept) | |
219 | return true; | |
220 | ||
dd5ad9d4 LP |
221 | LIST_FOREACH(port, p, s->ports) { |
222 | ||
223 | if (p->type != SOCKET_SOCKET) | |
224 | return true; | |
225 | ||
4f2d528d LP |
226 | if (!socket_address_can_accept(&p->address)) |
227 | return true; | |
dd5ad9d4 | 228 | } |
4f2d528d LP |
229 | |
230 | return false; | |
231 | } | |
232 | ||
eef85c4a | 233 | static int socket_add_mount_dependencies(Socket *s) { |
6e2ef85b LP |
234 | int r; |
235 | ||
236 | assert(s); | |
6e2ef85b | 237 | |
a57f7e2c LP |
238 | LIST_FOREACH(port, p, s->ports) { |
239 | const char *path = NULL; | |
6e2ef85b | 240 | |
a57f7e2c LP |
241 | if (p->type == SOCKET_SOCKET) |
242 | path = socket_address_get_path(&p->address); | |
60252446 | 243 | else if (IN_SET(p->type, SOCKET_FIFO, SOCKET_SPECIAL, SOCKET_USB_FUNCTION)) |
a57f7e2c | 244 | path = p->path; |
6e2ef85b | 245 | |
a57f7e2c LP |
246 | if (!path) |
247 | continue; | |
6e2ef85b | 248 | |
eef85c4a | 249 | r = unit_require_mounts_for(UNIT(s), path, UNIT_DEPENDENCY_FILE); |
b87705cd | 250 | if (r < 0) |
6e2ef85b | 251 | return r; |
b87705cd | 252 | } |
6e2ef85b LP |
253 | |
254 | return 0; | |
255 | } | |
256 | ||
eef85c4a | 257 | static int socket_add_device_dependencies(Socket *s) { |
6e2ef85b | 258 | char *t; |
6e2ef85b LP |
259 | |
260 | assert(s); | |
261 | ||
7d0c710d | 262 | if (!s->bind_to_device || streq(s->bind_to_device, "lo")) |
6e2ef85b LP |
263 | return 0; |
264 | ||
63c372cb | 265 | t = strjoina("/sys/subsystem/net/devices/", s->bind_to_device); |
d336ba9f | 266 | return unit_add_node_dependency(UNIT(s), t, UNIT_BINDS_TO, UNIT_DEPENDENCY_FILE); |
6e2ef85b LP |
267 | } |
268 | ||
a40eb732 LP |
269 | static int socket_add_default_dependencies(Socket *s) { |
270 | int r; | |
271 | assert(s); | |
272 | ||
4c9ea260 LP |
273 | if (!UNIT(s)->default_dependencies) |
274 | return 0; | |
275 | ||
35d8c19a | 276 | r = unit_add_dependency_by_name(UNIT(s), UNIT_BEFORE, SPECIAL_SOCKETS_TARGET, true, UNIT_DEPENDENCY_DEFAULT); |
e3d84721 LP |
277 | if (r < 0) |
278 | return r; | |
2a77d31d | 279 | |
463d0d15 | 280 | if (MANAGER_IS_SYSTEM(UNIT(s)->manager)) { |
3835b9aa | 281 | r = unit_add_two_dependencies_by_name(UNIT(s), UNIT_AFTER, UNIT_REQUIRES, SPECIAL_SYSINIT_TARGET, true, UNIT_DEPENDENCY_DEFAULT); |
e3d84721 | 282 | if (r < 0) |
a40eb732 | 283 | return r; |
2a77d31d | 284 | } |
a40eb732 | 285 | |
3835b9aa | 286 | return unit_add_two_dependencies_by_name(UNIT(s), UNIT_BEFORE, UNIT_CONFLICTS, SPECIAL_SHUTDOWN_TARGET, true, UNIT_DEPENDENCY_DEFAULT); |
a40eb732 LP |
287 | } |
288 | ||
d1e8e8b5 | 289 | static bool socket_has_exec(Socket *s) { |
4cfc6dbe LP |
290 | unsigned i; |
291 | assert(s); | |
292 | ||
293 | for (i = 0; i < _SOCKET_EXEC_COMMAND_MAX; i++) | |
294 | if (s->exec_command[i]) | |
295 | return true; | |
296 | ||
297 | return false; | |
298 | } | |
299 | ||
e821075a LP |
300 | static int socket_add_extras(Socket *s) { |
301 | Unit *u = UNIT(s); | |
e537352b | 302 | int r; |
44d8db9e | 303 | |
e821075a | 304 | assert(s); |
57020a3a | 305 | |
1f15ce28 LP |
306 | /* Pick defaults for the trigger limit, if nothing was explicitly configured. We pick a relatively high limit |
307 | * in Accept=yes mode, and a lower limit for Accept=no. Reason: in Accept=yes mode we are invoking accept() | |
308 | * ourselves before the trigger limit can hit, thus incoming connections are taken off the socket queue quickly | |
309 | * and reliably. This is different for Accept=no, where the spawned service has to take the incoming traffic | |
310 | * off the queues, which it might not necessarily do. Moreover, while Accept=no services are supposed to | |
311 | * process whatever is queued in one go, and thus should normally never have to be started frequently. This is | |
312 | * different for Accept=yes where each connection is processed by a new service instance, and thus frequent | |
2bec84e7 LP |
313 | * service starts are typical. |
314 | * | |
315 | * For the poll limit we follow a similar rule, but use 3/4th of the trigger limit parameters, to | |
316 | * trigger this earlier. */ | |
1f15ce28 LP |
317 | |
318 | if (s->trigger_limit.interval == USEC_INFINITY) | |
319 | s->trigger_limit.interval = 2 * USEC_PER_SEC; | |
2bec84e7 LP |
320 | if (s->trigger_limit.burst == UINT_MAX) |
321 | s->trigger_limit.burst = s->accept ? 200 : 20; | |
1f15ce28 | 322 | |
2bec84e7 LP |
323 | if (s->poll_limit_interval == USEC_INFINITY) |
324 | s->poll_limit_interval = 2 * USEC_PER_SEC; | |
325 | if (s->poll_limit_burst == UINT_MAX) | |
326 | s->poll_limit_burst = s->accept ? 150 : 15; | |
1f15ce28 | 327 | |
e821075a | 328 | if (have_non_accept_socket(s)) { |
23a177ef | 329 | |
e821075a LP |
330 | if (!UNIT_DEREF(s->service)) { |
331 | Unit *x; | |
57020a3a | 332 | |
e821075a | 333 | r = unit_load_related_unit(u, ".service", &x); |
57020a3a | 334 | if (r < 0) |
4f2d528d | 335 | return r; |
e821075a | 336 | |
7f7d01ed | 337 | unit_ref_set(&s->service, u, x); |
4f2d528d | 338 | } |
44d8db9e | 339 | |
eef85c4a | 340 | r = unit_add_two_dependencies(u, UNIT_BEFORE, UNIT_TRIGGERS, UNIT_DEREF(s->service), true, UNIT_DEPENDENCY_IMPLICIT); |
e821075a | 341 | if (r < 0) |
6e2ef85b | 342 | return r; |
e821075a | 343 | } |
6e2ef85b | 344 | |
eef85c4a | 345 | r = socket_add_mount_dependencies(s); |
e821075a LP |
346 | if (r < 0) |
347 | return r; | |
6e2ef85b | 348 | |
eef85c4a | 349 | r = socket_add_device_dependencies(s); |
e821075a LP |
350 | if (r < 0) |
351 | return r; | |
352 | ||
598459ce | 353 | r = unit_patch_contexts(u); |
e821075a LP |
354 | if (r < 0) |
355 | return r; | |
356 | ||
357 | if (socket_has_exec(s)) { | |
358 | r = unit_add_exec_dependencies(u, &s->exec_context); | |
359 | if (r < 0) | |
360 | return r; | |
e821075a | 361 | } |
a016b922 | 362 | |
88af31f9 LP |
363 | r = unit_set_default_slice(u); |
364 | if (r < 0) | |
365 | return r; | |
366 | ||
4c9ea260 LP |
367 | r = socket_add_default_dependencies(s); |
368 | if (r < 0) | |
369 | return r; | |
e821075a LP |
370 | |
371 | return 0; | |
372 | } | |
373 | ||
811ba7a0 LP |
374 | static const char *socket_find_symlink_target(Socket *s) { |
375 | const char *found = NULL; | |
811ba7a0 LP |
376 | |
377 | LIST_FOREACH(port, p, s->ports) { | |
378 | const char *f = NULL; | |
379 | ||
380 | switch (p->type) { | |
381 | ||
382 | case SOCKET_FIFO: | |
383 | f = p->path; | |
384 | break; | |
385 | ||
386 | case SOCKET_SOCKET: | |
b9495e8d | 387 | f = socket_address_get_path(&p->address); |
811ba7a0 LP |
388 | break; |
389 | ||
390 | default: | |
391 | break; | |
392 | } | |
393 | ||
394 | if (f) { | |
395 | if (found) | |
396 | return NULL; | |
397 | ||
398 | found = f; | |
399 | } | |
400 | } | |
401 | ||
402 | return found; | |
403 | } | |
404 | ||
e821075a LP |
405 | static int socket_verify(Socket *s) { |
406 | assert(s); | |
75193d41 | 407 | assert(UNIT(s)->load_state == UNIT_LOADED); |
e821075a | 408 | |
d85ff944 YW |
409 | if (!s->ports) |
410 | return log_unit_error_errno(UNIT(s), SYNTHETIC_ERRNO(ENOEXEC), "Unit has no Listen setting (ListenStream=, ListenDatagram=, ListenFIFO=, ...). Refusing."); | |
e821075a | 411 | |
d85ff944 YW |
412 | if (s->accept && have_non_accept_socket(s)) |
413 | return log_unit_error_errno(UNIT(s), SYNTHETIC_ERRNO(ENOEXEC), "Unit configured for accepting sockets, but sockets are non-accepting. Refusing."); | |
e821075a | 414 | |
d85ff944 YW |
415 | if (s->accept && s->max_connections <= 0) |
416 | return log_unit_error_errno(UNIT(s), SYNTHETIC_ERRNO(ENOEXEC), "MaxConnection= setting too small. Refusing."); | |
e06c73cc | 417 | |
d85ff944 YW |
418 | if (s->accept && UNIT_DEREF(s->service)) |
419 | return log_unit_error_errno(UNIT(s), SYNTHETIC_ERRNO(ENOEXEC), "Explicit service configuration for accepting socket units not supported. Refusing."); | |
e821075a | 420 | |
d85ff944 YW |
421 | if (s->exec_context.pam_name && s->kill_context.kill_mode != KILL_CONTROL_GROUP) |
422 | return log_unit_error_errno(UNIT(s), SYNTHETIC_ERRNO(ENOEXEC), "Unit has PAM enabled. Kill mode must be set to 'control-group'. Refusing."); | |
e821075a | 423 | |
d85ff944 YW |
424 | if (!strv_isempty(s->symlinks) && !socket_find_symlink_target(s)) |
425 | return log_unit_error_errno(UNIT(s), SYNTHETIC_ERRNO(ENOEXEC), "Unit has symlinks set but none or more than one node in the file system. Refusing."); | |
811ba7a0 | 426 | |
e821075a LP |
427 | return 0; |
428 | } | |
429 | ||
7a08d314 | 430 | static void peer_address_hash_func(const SocketPeer *s, struct siphash *state) { |
9d565427 SS |
431 | assert(s); |
432 | ||
433 | if (s->peer.sa.sa_family == AF_INET) | |
434 | siphash24_compress(&s->peer.in.sin_addr, sizeof(s->peer.in.sin_addr), state); | |
41733ae1 | 435 | else if (s->peer.sa.sa_family == AF_INET6) |
9d565427 | 436 | siphash24_compress(&s->peer.in6.sin6_addr, sizeof(s->peer.in6.sin6_addr), state); |
359a5bcf SH |
437 | else if (s->peer.sa.sa_family == AF_VSOCK) |
438 | siphash24_compress(&s->peer.vm.svm_cid, sizeof(s->peer.vm.svm_cid), state); | |
41733ae1 | 439 | else |
04499a70 | 440 | assert_not_reached(); |
9d565427 SS |
441 | } |
442 | ||
7a08d314 | 443 | static int peer_address_compare_func(const SocketPeer *x, const SocketPeer *y) { |
a0edd02e | 444 | int r; |
9d565427 | 445 | |
a0edd02e FB |
446 | r = CMP(x->peer.sa.sa_family, y->peer.sa.sa_family); |
447 | if (r != 0) | |
448 | return r; | |
9d565427 | 449 | |
79893116 | 450 | switch (x->peer.sa.sa_family) { |
9d565427 SS |
451 | case AF_INET: |
452 | return memcmp(&x->peer.in.sin_addr, &y->peer.in.sin_addr, sizeof(x->peer.in.sin_addr)); | |
453 | case AF_INET6: | |
454 | return memcmp(&x->peer.in6.sin6_addr, &y->peer.in6.sin6_addr, sizeof(x->peer.in6.sin6_addr)); | |
359a5bcf | 455 | case AF_VSOCK: |
6dd91b36 | 456 | return CMP(x->peer.vm.svm_cid, y->peer.vm.svm_cid); |
9d565427 | 457 | } |
04499a70 | 458 | assert_not_reached(); |
9d565427 SS |
459 | } |
460 | ||
7a08d314 | 461 | DEFINE_PRIVATE_HASH_OPS(peer_address_hash_ops, SocketPeer, peer_address_hash_func, peer_address_compare_func); |
9d565427 | 462 | |
e821075a LP |
463 | static int socket_load(Unit *u) { |
464 | Socket *s = SOCKET(u); | |
465 | int r; | |
466 | ||
467 | assert(u); | |
468 | assert(u->load_state == UNIT_STUB); | |
469 | ||
c3620770 | 470 | r = unit_load_fragment_and_dropin(u, true); |
e821075a LP |
471 | if (r < 0) |
472 | return r; | |
473 | ||
75193d41 ZJS |
474 | if (u->load_state != UNIT_LOADED) |
475 | return 0; | |
476 | ||
477 | /* This is a new unit? Then let's add in some extras */ | |
478 | r = socket_add_extras(s); | |
479 | if (r < 0) | |
480 | return r; | |
23a177ef | 481 | |
4f2d528d | 482 | return socket_verify(s); |
44d8db9e LP |
483 | } |
484 | ||
166cf510 ZJS |
485 | static SocketPeer *socket_peer_new(void) { |
486 | SocketPeer *p; | |
487 | ||
000b61b9 | 488 | p = new(SocketPeer, 1); |
166cf510 ZJS |
489 | if (!p) |
490 | return NULL; | |
491 | ||
000b61b9 LP |
492 | *p = (SocketPeer) { |
493 | .n_ref = 1, | |
494 | }; | |
166cf510 ZJS |
495 | return p; |
496 | } | |
497 | ||
8301aa0b YW |
498 | static SocketPeer *socket_peer_free(SocketPeer *p) { |
499 | assert(p); | |
166cf510 ZJS |
500 | |
501 | if (p->socket) | |
502 | set_remove(p->socket->peers_by_address, p); | |
503 | ||
504 | return mfree(p); | |
505 | } | |
506 | ||
8301aa0b YW |
507 | DEFINE_TRIVIAL_REF_UNREF_FUNC(SocketPeer, socket_peer, socket_peer_free); |
508 | ||
3ebcd323 | 509 | int socket_acquire_peer(Socket *s, int fd, SocketPeer **p) { |
166cf510 | 510 | _cleanup_(socket_peer_unrefp) SocketPeer *remote = NULL; |
000b61b9 LP |
511 | SocketPeer sa = { |
512 | .peer_salen = sizeof(union sockaddr_union), | |
513 | }, *i; | |
166cf510 ZJS |
514 | int r; |
515 | ||
516 | assert(fd >= 0); | |
517 | assert(s); | |
518 | ||
000b61b9 | 519 | if (getpeername(fd, &sa.peer.sa, &sa.peer_salen) < 0) |
fc2d74ab | 520 | return log_unit_error_errno(UNIT(s), errno, "getpeername failed: %m"); |
166cf510 | 521 | |
359a5bcf | 522 | if (!IN_SET(sa.peer.sa.sa_family, AF_INET, AF_INET6, AF_VSOCK)) { |
166cf510 ZJS |
523 | *p = NULL; |
524 | return 0; | |
525 | } | |
526 | ||
000b61b9 LP |
527 | r = set_ensure_allocated(&s->peers_by_address, &peer_address_hash_ops); |
528 | if (r < 0) | |
529 | return r; | |
530 | ||
166cf510 ZJS |
531 | i = set_get(s->peers_by_address, &sa); |
532 | if (i) { | |
533 | *p = socket_peer_ref(i); | |
534 | return 1; | |
535 | } | |
536 | ||
537 | remote = socket_peer_new(); | |
538 | if (!remote) | |
539 | return log_oom(); | |
540 | ||
541 | remote->peer = sa.peer; | |
000b61b9 | 542 | remote->peer_salen = sa.peer_salen; |
166cf510 ZJS |
543 | |
544 | r = set_put(s->peers_by_address, remote); | |
545 | if (r < 0) | |
546 | return r; | |
547 | ||
548 | remote->socket = s; | |
549 | ||
1cc6c93a | 550 | *p = TAKE_PTR(remote); |
166cf510 ZJS |
551 | return 1; |
552 | } | |
553 | ||
d1e8e8b5 | 554 | static const char* listen_lookup(int family, int type) { |
7a22745a LP |
555 | |
556 | if (family == AF_NETLINK) | |
557 | return "ListenNetlink"; | |
542563ba LP |
558 | |
559 | if (type == SOCK_STREAM) | |
560 | return "ListenStream"; | |
561 | else if (type == SOCK_DGRAM) | |
562 | return "ListenDatagram"; | |
563 | else if (type == SOCK_SEQPACKET) | |
564 | return "ListenSequentialPacket"; | |
565 | ||
04499a70 | 566 | assert_not_reached(); |
542563ba LP |
567 | return NULL; |
568 | } | |
569 | ||
87f0e418 | 570 | static void socket_dump(Unit *u, FILE *f, const char *prefix) { |
87f0e418 | 571 | Socket *s = SOCKET(u); |
827d9bf2 | 572 | const char *prefix2, *str; |
5cb5a6ff LP |
573 | |
574 | assert(s); | |
fa068367 | 575 | assert(f); |
5cb5a6ff | 576 | |
4c940960 | 577 | prefix = strempty(prefix); |
63c372cb | 578 | prefix2 = strjoina(prefix, "\t"); |
c43d20a0 | 579 | |
5cb5a6ff LP |
580 | fprintf(f, |
581 | "%sSocket State: %s\n" | |
81a5c6d0 | 582 | "%sResult: %s\n" |
c968d76a | 583 | "%sClean Result: %s\n" |
542563ba | 584 | "%sBindIPv6Only: %s\n" |
b5a0699f LP |
585 | "%sBacklog: %u\n" |
586 | "%sSocketMode: %04o\n" | |
4fd5948e LP |
587 | "%sDirectoryMode: %04o\n" |
588 | "%sKeepAlive: %s\n" | |
4427c3f4 | 589 | "%sNoDelay: %s\n" |
cebf8b20 | 590 | "%sFreeBind: %s\n" |
6b6d2dee | 591 | "%sTransparent: %s\n" |
ec6370a2 | 592 | "%sBroadcast: %s\n" |
ede3deb4 | 593 | "%sPassCredentials: %s\n" |
54ecda32 | 594 | "%sPassSecurity: %s\n" |
a3d19f5d | 595 | "%sPassPacketInfo: %s\n" |
bd1fe7c7 | 596 | "%sTCPCongestion: %s\n" |
16115b0a | 597 | "%sRemoveOnStop: %s\n" |
55301ec0 | 598 | "%sWritable: %s\n" |
827d9bf2 | 599 | "%sFileDescriptorName: %s\n" |
16115b0a | 600 | "%sSELinuxContextFromNet: %s\n", |
a16e1123 | 601 | prefix, socket_state_to_string(s->state), |
81a5c6d0 | 602 | prefix, socket_result_to_string(s->result), |
c968d76a | 603 | prefix, socket_result_to_string(s->clean_result), |
c0120d99 | 604 | prefix, socket_address_bind_ipv6_only_to_string(s->bind_ipv6_only), |
b5a0699f LP |
605 | prefix, s->backlog, |
606 | prefix, s->socket_mode, | |
4fd5948e LP |
607 | prefix, s->directory_mode, |
608 | prefix, yes_no(s->keep_alive), | |
4427c3f4 | 609 | prefix, yes_no(s->no_delay), |
cebf8b20 | 610 | prefix, yes_no(s->free_bind), |
6b6d2dee | 611 | prefix, yes_no(s->transparent), |
ec6370a2 | 612 | prefix, yes_no(s->broadcast), |
d68af586 | 613 | prefix, yes_no(s->pass_cred), |
54ecda32 | 614 | prefix, yes_no(s->pass_sec), |
a3d19f5d | 615 | prefix, yes_no(s->pass_pktinfo), |
bd1fe7c7 | 616 | prefix, strna(s->tcp_congestion), |
16115b0a | 617 | prefix, yes_no(s->remove_on_stop), |
55301ec0 | 618 | prefix, yes_no(s->writable), |
8dd4c05b | 619 | prefix, socket_fdname(s), |
16115b0a | 620 | prefix, yes_no(s->selinux_context_from_net)); |
542563ba | 621 | |
9b191525 LP |
622 | if (s->timestamping != SOCKET_TIMESTAMPING_OFF) |
623 | fprintf(f, | |
624 | "%sTimestamping: %s\n", | |
625 | prefix, socket_timestamping_to_string(s->timestamping)); | |
626 | ||
43a19142 | 627 | if (pidref_is_set(&s->control_pid)) |
70123e68 | 628 | fprintf(f, |
de0671ee | 629 | "%sControl PID: "PID_FMT"\n", |
43a19142 | 630 | prefix, s->control_pid.pid); |
70123e68 | 631 | |
acbb0225 LP |
632 | if (s->bind_to_device) |
633 | fprintf(f, | |
634 | "%sBindToDevice: %s\n", | |
635 | prefix, s->bind_to_device); | |
636 | ||
4f2d528d LP |
637 | if (s->accept) |
638 | fprintf(f, | |
6cf6bbc2 LP |
639 | "%sAccepted: %u\n" |
640 | "%sNConnections: %u\n" | |
827d9bf2 YW |
641 | "%sMaxConnections: %u\n" |
642 | "%sMaxConnectionsPerSource: %u\n", | |
6cf6bbc2 LP |
643 | prefix, s->n_accepted, |
644 | prefix, s->n_connections, | |
827d9bf2 YW |
645 | prefix, s->max_connections, |
646 | prefix, s->max_connections_per_source); | |
3e5f04bf RM |
647 | else |
648 | fprintf(f, | |
649 | "%sFlushPending: %s\n", | |
650 | prefix, yes_no(s->flush_pending)); | |
651 | ||
4f2d528d | 652 | |
4fd5948e LP |
653 | if (s->priority >= 0) |
654 | fprintf(f, | |
655 | "%sPriority: %i\n", | |
656 | prefix, s->priority); | |
657 | ||
658 | if (s->receive_buffer > 0) | |
659 | fprintf(f, | |
660 | "%sReceiveBuffer: %zu\n", | |
661 | prefix, s->receive_buffer); | |
662 | ||
663 | if (s->send_buffer > 0) | |
664 | fprintf(f, | |
665 | "%sSendBuffer: %zu\n", | |
666 | prefix, s->send_buffer); | |
667 | ||
668 | if (s->ip_tos >= 0) | |
669 | fprintf(f, | |
670 | "%sIPTOS: %i\n", | |
671 | prefix, s->ip_tos); | |
672 | ||
673 | if (s->ip_ttl >= 0) | |
674 | fprintf(f, | |
675 | "%sIPTTL: %i\n", | |
676 | prefix, s->ip_ttl); | |
677 | ||
678 | if (s->pipe_size > 0) | |
679 | fprintf(f, | |
680 | "%sPipeSize: %zu\n", | |
681 | prefix, s->pipe_size); | |
682 | ||
683 | if (s->mark >= 0) | |
684 | fprintf(f, | |
685 | "%sMark: %i\n", | |
686 | prefix, s->mark); | |
687 | ||
916abb21 LP |
688 | if (s->mq_maxmsg > 0) |
689 | fprintf(f, | |
690 | "%sMessageQueueMaxMessages: %li\n", | |
691 | prefix, s->mq_maxmsg); | |
692 | ||
693 | if (s->mq_msgsize > 0) | |
694 | fprintf(f, | |
695 | "%sMessageQueueMessageSize: %li\n", | |
696 | prefix, s->mq_msgsize); | |
697 | ||
718db961 | 698 | if (s->reuse_port) |
f7db7a69 SL |
699 | fprintf(f, |
700 | "%sReusePort: %s\n", | |
718db961 | 701 | prefix, yes_no(s->reuse_port)); |
f7db7a69 | 702 | |
0eb59ccf AK |
703 | if (s->smack) |
704 | fprintf(f, | |
705 | "%sSmackLabel: %s\n", | |
706 | prefix, s->smack); | |
707 | ||
708 | if (s->smack_ip_in) | |
709 | fprintf(f, | |
710 | "%sSmackLabelIPIn: %s\n", | |
711 | prefix, s->smack_ip_in); | |
712 | ||
713 | if (s->smack_ip_out) | |
714 | fprintf(f, | |
715 | "%sSmackLabelIPOut: %s\n", | |
716 | prefix, s->smack_ip_out); | |
717 | ||
3900e5fd LP |
718 | if (!isempty(s->user) || !isempty(s->group)) |
719 | fprintf(f, | |
d2a50e3b LP |
720 | "%sSocketUser: %s\n" |
721 | "%sSocketGroup: %s\n", | |
3900e5fd LP |
722 | prefix, strna(s->user), |
723 | prefix, strna(s->group)); | |
724 | ||
7bbfcf64 | 725 | if (timestamp_is_set(s->keep_alive_time)) |
209e9dcd | 726 | fprintf(f, |
3cd761e4 | 727 | "%sKeepAliveTimeSec: %s\n", |
5291f26d | 728 | prefix, FORMAT_TIMESPAN(s->keep_alive_time, USEC_PER_SEC)); |
209e9dcd | 729 | |
7be9df7d | 730 | if (s->keep_alive_interval > 0) |
209e9dcd | 731 | fprintf(f, |
3cd761e4 | 732 | "%sKeepAliveIntervalSec: %s\n", |
5291f26d | 733 | prefix, FORMAT_TIMESPAN(s->keep_alive_interval, USEC_PER_SEC)); |
209e9dcd | 734 | |
7be9df7d | 735 | if (s->keep_alive_cnt > 0) |
209e9dcd SS |
736 | fprintf(f, |
737 | "%sKeepAliveProbes: %u\n", | |
738 | prefix, s->keep_alive_cnt); | |
739 | ||
7be9df7d | 740 | if (s->defer_accept > 0) |
cc567c9b | 741 | fprintf(f, |
3cd761e4 | 742 | "%sDeferAcceptSec: %s\n", |
5291f26d | 743 | prefix, FORMAT_TIMESPAN(s->defer_accept, USEC_PER_SEC)); |
cc567c9b | 744 | |
034c6ed7 | 745 | LIST_FOREACH(port, p, s->ports) { |
5cb5a6ff | 746 | |
7be9df7d YW |
747 | switch (p->type) { |
748 | case SOCKET_SOCKET: { | |
749 | _cleanup_free_ char *k = NULL; | |
542563ba | 750 | int r; |
542563ba | 751 | |
e53fc357 | 752 | r = socket_address_print(&p->address, &k); |
38553034 ZJS |
753 | if (r < 0) { |
754 | errno = -r; | |
755 | fprintf(f, "%s%s: %m\n", prefix, listen_lookup(socket_address_family(&p->address), p->address.type)); | |
756 | } else | |
757 | fprintf(f, "%s%s: %s\n", prefix, listen_lookup(socket_address_family(&p->address), p->address.type), k); | |
7be9df7d YW |
758 | break; |
759 | } | |
760 | case SOCKET_SPECIAL: | |
b0a3f2bc | 761 | fprintf(f, "%sListenSpecial: %s\n", prefix, p->path); |
7be9df7d YW |
762 | break; |
763 | case SOCKET_USB_FUNCTION: | |
60252446 | 764 | fprintf(f, "%sListenUSBFunction: %s\n", prefix, p->path); |
7be9df7d YW |
765 | break; |
766 | case SOCKET_MQUEUE: | |
916abb21 | 767 | fprintf(f, "%sListenMessageQueue: %s\n", prefix, p->path); |
7be9df7d YW |
768 | break; |
769 | default: | |
542563ba | 770 | fprintf(f, "%sListenFIFO: %s\n", prefix, p->path); |
7be9df7d | 771 | } |
542563ba | 772 | } |
5cb5a6ff | 773 | |
1745fa70 EV |
774 | fprintf(f, |
775 | "%sTriggerLimitIntervalSec: %s\n" | |
2bec84e7 LP |
776 | "%sTriggerLimitBurst: %u\n" |
777 | "%sPollLimitIntervalSec: %s\n" | |
778 | "%sPollLimitBurst: %u\n", | |
5291f26d | 779 | prefix, FORMAT_TIMESPAN(s->trigger_limit.interval, USEC_PER_SEC), |
2bec84e7 LP |
780 | prefix, s->trigger_limit.burst, |
781 | prefix, FORMAT_TIMESPAN(s->poll_limit_interval, USEC_PER_SEC), | |
782 | prefix, s->poll_limit_burst); | |
1745fa70 | 783 | |
da96ad5a | 784 | str = ip_protocol_to_name(s->socket_protocol); |
827d9bf2 YW |
785 | if (str) |
786 | fprintf(f, "%sSocketProtocol: %s\n", prefix, str); | |
787 | ||
788 | if (!strv_isempty(s->symlinks)) { | |
827d9bf2 YW |
789 | fprintf(f, "%sSymlinks:", prefix); |
790 | STRV_FOREACH(q, s->symlinks) | |
791 | fprintf(f, " %s", *q); | |
792 | ||
793 | fprintf(f, "\n"); | |
794 | } | |
795 | ||
796 | fprintf(f, | |
797 | "%sTimeoutSec: %s\n", | |
5291f26d | 798 | prefix, FORMAT_TIMESPAN(s->timeout_usec, USEC_PER_SEC)); |
827d9bf2 | 799 | |
5cb5a6ff | 800 | exec_context_dump(&s->exec_context, f, prefix); |
4819ff03 | 801 | kill_context_dump(&s->kill_context, f, prefix); |
5cb5a6ff | 802 | |
6c1abe88 | 803 | for (SocketExecCommand c = 0; c < _SOCKET_EXEC_COMMAND_MAX; c++) { |
c43d20a0 LP |
804 | if (!s->exec_command[c]) |
805 | continue; | |
5cb5a6ff | 806 | |
40d50879 | 807 | fprintf(f, "%s-> %s:\n", |
a16e1123 | 808 | prefix, socket_exec_command_to_string(c)); |
c43d20a0 LP |
809 | |
810 | exec_command_dump_list(s->exec_command[c], f, prefix2); | |
5cb5a6ff | 811 | } |
18f573aa | 812 | |
bc0623df | 813 | cgroup_context_dump(UNIT(s), f, prefix); |
5cb5a6ff LP |
814 | } |
815 | ||
4f2d528d LP |
816 | static int instance_from_socket(int fd, unsigned nr, char **instance) { |
817 | socklen_t l; | |
818 | char *r; | |
9d16d0c7 | 819 | union sockaddr_union local, remote; |
4f2d528d LP |
820 | |
821 | assert(fd >= 0); | |
822 | assert(instance); | |
823 | ||
824 | l = sizeof(local); | |
825 | if (getsockname(fd, &local.sa, &l) < 0) | |
826 | return -errno; | |
827 | ||
828 | l = sizeof(remote); | |
829 | if (getpeername(fd, &remote.sa, &l) < 0) | |
830 | return -errno; | |
831 | ||
832 | switch (local.sa.sa_family) { | |
833 | ||
834 | case AF_INET: { | |
835 | uint32_t | |
8e38570e LP |
836 | a = be32toh(local.in.sin_addr.s_addr), |
837 | b = be32toh(remote.in.sin_addr.s_addr); | |
4f2d528d LP |
838 | |
839 | if (asprintf(&r, | |
77b088c2 LP |
840 | "%u-%u.%u.%u.%u:%u-%u.%u.%u.%u:%u", |
841 | nr, | |
4f2d528d | 842 | a >> 24, (a >> 16) & 0xFF, (a >> 8) & 0xFF, a & 0xFF, |
8e38570e | 843 | be16toh(local.in.sin_port), |
4f2d528d | 844 | b >> 24, (b >> 16) & 0xFF, (b >> 8) & 0xFF, b & 0xFF, |
8e38570e | 845 | be16toh(remote.in.sin_port)) < 0) |
4f2d528d LP |
846 | return -ENOMEM; |
847 | ||
848 | break; | |
849 | } | |
850 | ||
851 | case AF_INET6: { | |
c65a0b14 | 852 | static const unsigned char ipv4_prefix[] = { |
2b061f5a LP |
853 | 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0xFF, 0xFF |
854 | }; | |
855 | ||
856 | if (memcmp(&local.in6.sin6_addr, ipv4_prefix, sizeof(ipv4_prefix)) == 0 && | |
857 | memcmp(&remote.in6.sin6_addr, ipv4_prefix, sizeof(ipv4_prefix)) == 0) { | |
858 | const uint8_t | |
859 | *a = local.in6.sin6_addr.s6_addr+12, | |
860 | *b = remote.in6.sin6_addr.s6_addr+12; | |
861 | ||
862 | if (asprintf(&r, | |
77b088c2 LP |
863 | "%u-%u.%u.%u.%u:%u-%u.%u.%u.%u:%u", |
864 | nr, | |
2b061f5a | 865 | a[0], a[1], a[2], a[3], |
8e38570e | 866 | be16toh(local.in6.sin6_port), |
2b061f5a | 867 | b[0], b[1], b[2], b[3], |
8e38570e | 868 | be16toh(remote.in6.sin6_port)) < 0) |
2b061f5a LP |
869 | return -ENOMEM; |
870 | } else { | |
2b061f5a | 871 | if (asprintf(&r, |
77b088c2 LP |
872 | "%u-%s:%u-%s:%u", |
873 | nr, | |
071e522e | 874 | IN6_ADDR_TO_STRING(&local.in6.sin6_addr), |
8e38570e | 875 | be16toh(local.in6.sin6_port), |
071e522e | 876 | IN6_ADDR_TO_STRING(&remote.in6.sin6_addr), |
8e38570e | 877 | be16toh(remote.in6.sin6_port)) < 0) |
2b061f5a LP |
878 | return -ENOMEM; |
879 | } | |
4f2d528d LP |
880 | |
881 | break; | |
882 | } | |
883 | ||
884 | case AF_UNIX: { | |
885 | struct ucred ucred; | |
eff05270 | 886 | int k; |
4f2d528d | 887 | |
eff05270 | 888 | k = getpeercred(fd, &ucred); |
d38f6e34 ZJS |
889 | if (k >= 0) { |
890 | if (asprintf(&r, | |
891 | "%u-"PID_FMT"-"UID_FMT, | |
892 | nr, ucred.pid, ucred.uid) < 0) | |
893 | return -ENOMEM; | |
894 | } else if (k == -ENODATA) { | |
895 | /* This handles the case where somebody is | |
896 | * connecting from another pid/uid namespace | |
897 | * (e.g. from outside of our container). */ | |
898 | if (asprintf(&r, | |
899 | "%u-unknown", | |
900 | nr) < 0) | |
901 | return -ENOMEM; | |
902 | } else | |
eff05270 | 903 | return k; |
2f20a8eb | 904 | |
2f20a8eb | 905 | break; |
4f2d528d LP |
906 | } |
907 | ||
359a5bcf SH |
908 | case AF_VSOCK: |
909 | if (asprintf(&r, | |
910 | "%u-%u:%u-%u:%u", | |
911 | nr, | |
912 | local.vm.svm_cid, local.vm.svm_port, | |
913 | remote.vm.svm_cid, remote.vm.svm_port) < 0) | |
914 | return -ENOMEM; | |
915 | ||
916 | break; | |
917 | ||
4f2d528d | 918 | default: |
04499a70 | 919 | assert_not_reached(); |
4f2d528d LP |
920 | } |
921 | ||
922 | *instance = r; | |
923 | return 0; | |
924 | } | |
925 | ||
034c6ed7 | 926 | static void socket_close_fds(Socket *s) { |
83c60c9f LP |
927 | assert(s); |
928 | ||
034c6ed7 | 929 | LIST_FOREACH(port, p, s->ports) { |
18e854f8 | 930 | bool was_open; |
718db961 | 931 | |
18e854f8 | 932 | was_open = p->fd >= 0; |
83c60c9f | 933 | |
5dcadb4c | 934 | p->event_source = sd_event_source_disable_unref(p->event_source); |
03e334a1 | 935 | p->fd = safe_close(p->fd); |
15087cdb | 936 | socket_cleanup_fd_list(p); |
a16e1123 | 937 | |
18e854f8 LP |
938 | /* One little note: we should normally not delete any sockets in the file system here! After all some |
939 | * other process we spawned might still have a reference of this fd and wants to continue to use | |
940 | * it. Therefore we normally delete sockets in the file system before we create a new one, not after we | |
941 | * stopped using one! That all said, if the user explicitly requested this, we'll delete them here | |
942 | * anyway, but only then. */ | |
bd1fe7c7 | 943 | |
18e854f8 LP |
944 | if (!was_open || !s->remove_on_stop) |
945 | continue; | |
946 | ||
947 | switch (p->type) { | |
bd1fe7c7 | 948 | |
18e854f8 LP |
949 | case SOCKET_FIFO: |
950 | (void) unlink(p->path); | |
951 | break; | |
bd1fe7c7 | 952 | |
18e854f8 LP |
953 | case SOCKET_MQUEUE: |
954 | (void) mq_unlink(p->path); | |
955 | break; | |
bd1fe7c7 | 956 | |
18e854f8 LP |
957 | case SOCKET_SOCKET: |
958 | (void) socket_address_unlink(&p->address); | |
959 | break; | |
bd1fe7c7 | 960 | |
18e854f8 LP |
961 | default: |
962 | break; | |
bd1fe7c7 | 963 | } |
83c60c9f | 964 | } |
811ba7a0 LP |
965 | |
966 | if (s->remove_on_stop) | |
967 | STRV_FOREACH(i, s->symlinks) | |
18e854f8 | 968 | (void) unlink(*i); |
75db809a ZJS |
969 | |
970 | /* Note that we don't return NULL here, since s has not been freed. */ | |
83c60c9f LP |
971 | } |
972 | ||
5d0fe423 | 973 | static void socket_apply_socket_options(Socket *s, SocketPort *p, int fd) { |
d53e386d LP |
974 | int r; |
975 | ||
4fd5948e | 976 | assert(s); |
5d0fe423 | 977 | assert(p); |
4fd5948e LP |
978 | assert(fd >= 0); |
979 | ||
980 | if (s->keep_alive) { | |
2ff48e98 LP |
981 | r = setsockopt_int(fd, SOL_SOCKET, SO_KEEPALIVE, true); |
982 | if (r < 0) | |
983 | log_unit_warning_errno(UNIT(s), r, "SO_KEEPALIVE failed: %m"); | |
4fd5948e LP |
984 | } |
985 | ||
7bbfcf64 | 986 | if (timestamp_is_set(s->keep_alive_time)) { |
9e5b6496 YW |
987 | r = setsockopt_int(fd, SOL_TCP, TCP_KEEPIDLE, s->keep_alive_time / USEC_PER_SEC); |
988 | if (r < 0) | |
989 | log_unit_warning_errno(UNIT(s), r, "TCP_KEEPIDLE failed: %m"); | |
209e9dcd SS |
990 | } |
991 | ||
7be9df7d | 992 | if (s->keep_alive_interval > 0) { |
9e5b6496 YW |
993 | r = setsockopt_int(fd, SOL_TCP, TCP_KEEPINTVL, s->keep_alive_interval / USEC_PER_SEC); |
994 | if (r < 0) | |
995 | log_unit_warning_errno(UNIT(s), r, "TCP_KEEPINTVL failed: %m"); | |
209e9dcd SS |
996 | } |
997 | ||
7be9df7d | 998 | if (s->keep_alive_cnt > 0) { |
9e5b6496 YW |
999 | r = setsockopt_int(fd, SOL_TCP, TCP_KEEPCNT, s->keep_alive_cnt); |
1000 | if (r < 0) | |
1001 | log_unit_warning_errno(UNIT(s), r, "TCP_KEEPCNT failed: %m"); | |
209e9dcd SS |
1002 | } |
1003 | ||
7be9df7d | 1004 | if (s->defer_accept > 0) { |
9e5b6496 YW |
1005 | r = setsockopt_int(fd, SOL_TCP, TCP_DEFER_ACCEPT, s->defer_accept / USEC_PER_SEC); |
1006 | if (r < 0) | |
1007 | log_unit_warning_errno(UNIT(s), r, "TCP_DEFER_ACCEPT failed: %m"); | |
cc567c9b SS |
1008 | } |
1009 | ||
4427c3f4 | 1010 | if (s->no_delay) { |
62bc4efc | 1011 | if (s->socket_protocol == IPPROTO_SCTP) { |
2ff48e98 LP |
1012 | r = setsockopt_int(fd, SOL_SCTP, SCTP_NODELAY, true); |
1013 | if (r < 0) | |
1014 | log_unit_warning_errno(UNIT(s), r, "SCTP_NODELAY failed: %m"); | |
62bc4efc | 1015 | } else { |
2ff48e98 LP |
1016 | r = setsockopt_int(fd, SOL_TCP, TCP_NODELAY, true); |
1017 | if (r < 0) | |
1018 | log_unit_warning_errno(UNIT(s), r, "TCP_NODELAY failed: %m"); | |
62bc4efc | 1019 | } |
4427c3f4 SS |
1020 | } |
1021 | ||
ec6370a2 | 1022 | if (s->broadcast) { |
2ff48e98 LP |
1023 | r = setsockopt_int(fd, SOL_SOCKET, SO_BROADCAST, true); |
1024 | if (r < 0) | |
1025 | log_unit_warning_errno(UNIT(s), r, "SO_BROADCAST failed: %m"); | |
ec6370a2 LP |
1026 | } |
1027 | ||
d68af586 | 1028 | if (s->pass_cred) { |
2ff48e98 LP |
1029 | r = setsockopt_int(fd, SOL_SOCKET, SO_PASSCRED, true); |
1030 | if (r < 0) | |
1031 | log_unit_warning_errno(UNIT(s), r, "SO_PASSCRED failed: %m"); | |
d68af586 MS |
1032 | } |
1033 | ||
54ecda32 | 1034 | if (s->pass_sec) { |
2ff48e98 LP |
1035 | r = setsockopt_int(fd, SOL_SOCKET, SO_PASSSEC, true); |
1036 | if (r < 0) | |
1037 | log_unit_warning_errno(UNIT(s), r, "SO_PASSSEC failed: %m"); | |
54ecda32 LP |
1038 | } |
1039 | ||
a3d19f5d | 1040 | if (s->pass_pktinfo) { |
5d0fe423 | 1041 | r = socket_set_recvpktinfo(fd, socket_address_family(&p->address), true); |
a3d19f5d LP |
1042 | if (r < 0) |
1043 | log_unit_warning_errno(UNIT(s), r, "Failed to enable packet info socket option: %m"); | |
1044 | } | |
1045 | ||
9b191525 LP |
1046 | if (s->timestamping != SOCKET_TIMESTAMPING_OFF) { |
1047 | r = setsockopt_int(fd, SOL_SOCKET, | |
1048 | s->timestamping == SOCKET_TIMESTAMPING_NS ? SO_TIMESTAMPNS : SO_TIMESTAMP, | |
1049 | true); | |
1050 | if (r < 0) | |
1051 | log_unit_warning_errno(UNIT(s), r, "Failed to enable timestamping socket option, ignoring: %m"); | |
1052 | } | |
1053 | ||
9e5b6496 YW |
1054 | if (s->priority >= 0) { |
1055 | r = setsockopt_int(fd, SOL_SOCKET, SO_PRIORITY, s->priority); | |
1056 | if (r < 0) | |
1057 | log_unit_warning_errno(UNIT(s), r, "SO_PRIORITY failed: %m"); | |
1058 | } | |
4fd5948e LP |
1059 | |
1060 | if (s->receive_buffer > 0) { | |
ded71ab3 YW |
1061 | r = fd_set_rcvbuf(fd, s->receive_buffer, false); |
1062 | if (r < 0) | |
35b4e3c1 LP |
1063 | log_unit_full_errno(UNIT(s), ERRNO_IS_PRIVILEGE(r) ? LOG_DEBUG : LOG_WARNING, r, |
1064 | "SO_RCVBUF/SO_RCVBUFFORCE failed: %m"); | |
4fd5948e LP |
1065 | } |
1066 | ||
1067 | if (s->send_buffer > 0) { | |
4934ba21 | 1068 | r = fd_set_sndbuf(fd, s->send_buffer, false); |
ded71ab3 | 1069 | if (r < 0) |
35b4e3c1 LP |
1070 | log_unit_full_errno(UNIT(s), ERRNO_IS_PRIVILEGE(r) ? LOG_DEBUG : LOG_WARNING, r, |
1071 | "SO_SNDBUF/SO_SNDBUFFORCE failed: %m"); | |
4fd5948e LP |
1072 | } |
1073 | ||
9e5b6496 YW |
1074 | if (s->mark >= 0) { |
1075 | r = setsockopt_int(fd, SOL_SOCKET, SO_MARK, s->mark); | |
1076 | if (r < 0) | |
1077 | log_unit_warning_errno(UNIT(s), r, "SO_MARK failed: %m"); | |
1078 | } | |
4fd5948e | 1079 | |
9e5b6496 YW |
1080 | if (s->ip_tos >= 0) { |
1081 | r = setsockopt_int(fd, IPPROTO_IP, IP_TOS, s->ip_tos); | |
1082 | if (r < 0) | |
1083 | log_unit_warning_errno(UNIT(s), r, "IP_TOS failed: %m"); | |
1084 | } | |
4fd5948e | 1085 | |
46925ac5 | 1086 | if (s->ip_ttl >= 0) { |
5d0fe423 LP |
1087 | r = socket_set_ttl(fd, socket_address_family(&p->address), s->ip_ttl); |
1088 | if (r < 0) | |
9e5b6496 | 1089 | log_unit_warning_errno(UNIT(s), r, "IP_TTL/IPV6_UNICAST_HOPS failed: %m"); |
46925ac5 | 1090 | } |
cebf8b20 TT |
1091 | |
1092 | if (s->tcp_congestion) | |
1093 | if (setsockopt(fd, SOL_TCP, TCP_CONGESTION, s->tcp_congestion, strlen(s->tcp_congestion)+1) < 0) | |
f2341e0a | 1094 | log_unit_warning_errno(UNIT(s), errno, "TCP_CONGESTION failed: %m"); |
0eb59ccf | 1095 | |
d53e386d | 1096 | if (s->smack_ip_in) { |
5ab58c20 | 1097 | r = mac_smack_apply_fd(fd, SMACK_ATTR_IPIN, s->smack_ip_in); |
d53e386d | 1098 | if (r < 0) |
f2341e0a | 1099 | log_unit_error_errno(UNIT(s), r, "mac_smack_apply_ip_in_fd: %m"); |
d53e386d | 1100 | } |
9a4e038c | 1101 | |
d53e386d | 1102 | if (s->smack_ip_out) { |
5ab58c20 | 1103 | r = mac_smack_apply_fd(fd, SMACK_ATTR_IPOUT, s->smack_ip_out); |
d53e386d | 1104 | if (r < 0) |
f2341e0a | 1105 | log_unit_error_errno(UNIT(s), r, "mac_smack_apply_ip_out_fd: %m"); |
d53e386d | 1106 | } |
4fd5948e LP |
1107 | } |
1108 | ||
b15bdda8 | 1109 | static void socket_apply_fifo_options(Socket *s, int fd) { |
d53e386d LP |
1110 | int r; |
1111 | ||
4fd5948e LP |
1112 | assert(s); |
1113 | assert(fd >= 0); | |
1114 | ||
1115 | if (s->pipe_size > 0) | |
1116 | if (fcntl(fd, F_SETPIPE_SZ, s->pipe_size) < 0) | |
ed460b07 | 1117 | log_unit_warning_errno(UNIT(s), errno, "Setting pipe size failed, ignoring: %m"); |
0eb59ccf | 1118 | |
d53e386d | 1119 | if (s->smack) { |
5ab58c20 | 1120 | r = mac_smack_apply_fd(fd, SMACK_ATTR_ACCESS, s->smack); |
d53e386d | 1121 | if (r < 0) |
ed460b07 | 1122 | log_unit_error_errno(UNIT(s), r, "SMACK relabelling failed, ignoring: %m"); |
d53e386d | 1123 | } |
4fd5948e LP |
1124 | } |
1125 | ||
b15bdda8 LP |
1126 | static int fifo_address_create( |
1127 | const char *path, | |
1128 | mode_t directory_mode, | |
e8da24a6 | 1129 | mode_t socket_mode) { |
b15bdda8 | 1130 | |
254d1313 | 1131 | _cleanup_close_ int fd = -EBADF; |
b15bdda8 | 1132 | mode_t old_mask; |
e8da24a6 LP |
1133 | struct stat st; |
1134 | int r; | |
b15bdda8 LP |
1135 | |
1136 | assert(path); | |
b15bdda8 | 1137 | |
1af87ab7 | 1138 | (void) mkdir_parents_label(path, directory_mode); |
b15bdda8 | 1139 | |
ecabcf8b | 1140 | r = mac_selinux_create_file_prepare(path, S_IFIFO); |
e9a5ef7c | 1141 | if (r < 0) |
e8da24a6 | 1142 | return r; |
b15bdda8 LP |
1143 | |
1144 | /* Enforce the right access mode for the fifo */ | |
7be9df7d | 1145 | old_mask = umask(~socket_mode); |
b15bdda8 LP |
1146 | |
1147 | /* Include the original umask in our mask */ | |
e8da24a6 | 1148 | (void) umask(~socket_mode | old_mask); |
b15bdda8 LP |
1149 | |
1150 | r = mkfifo(path, socket_mode); | |
e8da24a6 | 1151 | (void) umask(old_mask); |
b15bdda8 | 1152 | |
94bc2731 | 1153 | if (r < 0 && errno != EEXIST) { |
b15bdda8 LP |
1154 | r = -errno; |
1155 | goto fail; | |
1156 | } | |
1157 | ||
e8da24a6 | 1158 | fd = open(path, O_RDWR | O_CLOEXEC | O_NOCTTY | O_NONBLOCK | O_NOFOLLOW); |
3cc2aff1 | 1159 | if (fd < 0) { |
b15bdda8 LP |
1160 | r = -errno; |
1161 | goto fail; | |
1162 | } | |
1163 | ||
ecabcf8b | 1164 | mac_selinux_create_file_clear(); |
7a58bfa4 | 1165 | |
b15bdda8 LP |
1166 | if (fstat(fd, &st) < 0) { |
1167 | r = -errno; | |
1168 | goto fail; | |
1169 | } | |
1170 | ||
1171 | if (!S_ISFIFO(st.st_mode) || | |
de0200fc | 1172 | (st.st_mode & 0777) != (socket_mode & ~old_mask) || |
e4f44e73 DR |
1173 | st.st_uid != getuid() || |
1174 | st.st_gid != getgid()) { | |
b15bdda8 LP |
1175 | r = -EEXIST; |
1176 | goto fail; | |
1177 | } | |
1178 | ||
c10d6bdb | 1179 | return TAKE_FD(fd); |
b15bdda8 LP |
1180 | |
1181 | fail: | |
ecabcf8b | 1182 | mac_selinux_create_file_clear(); |
b15bdda8 LP |
1183 | return r; |
1184 | } | |
1185 | ||
55301ec0 | 1186 | static int special_address_create(const char *path, bool writable) { |
254d1313 | 1187 | _cleanup_close_ int fd = -EBADF; |
b0a3f2bc LP |
1188 | struct stat st; |
1189 | ||
1190 | assert(path); | |
b0a3f2bc | 1191 | |
55301ec0 | 1192 | fd = open(path, (writable ? O_RDWR : O_RDONLY)|O_CLOEXEC|O_NOCTTY|O_NONBLOCK|O_NOFOLLOW); |
e8da24a6 LP |
1193 | if (fd < 0) |
1194 | return -errno; | |
b0a3f2bc | 1195 | |
e8da24a6 LP |
1196 | if (fstat(fd, &st) < 0) |
1197 | return -errno; | |
b0a3f2bc LP |
1198 | |
1199 | /* Check whether this is a /proc, /sys or /dev file or char device */ | |
e8da24a6 LP |
1200 | if (!S_ISREG(st.st_mode) && !S_ISCHR(st.st_mode)) |
1201 | return -EEXIST; | |
b0a3f2bc | 1202 | |
c10d6bdb | 1203 | return TAKE_FD(fd); |
b0a3f2bc LP |
1204 | } |
1205 | ||
36078102 | 1206 | static int usbffs_address_create(const char *path) { |
254d1313 | 1207 | _cleanup_close_ int fd = -EBADF; |
60252446 PS |
1208 | struct stat st; |
1209 | ||
1210 | assert(path); | |
60252446 PS |
1211 | |
1212 | fd = open(path, O_RDWR|O_CLOEXEC|O_NOCTTY|O_NONBLOCK|O_NOFOLLOW); | |
1213 | if (fd < 0) | |
1214 | return -errno; | |
1215 | ||
1216 | if (fstat(fd, &st) < 0) | |
1217 | return -errno; | |
1218 | ||
13e785f7 | 1219 | /* Check whether this is a regular file (ffs endpoint) */ |
60252446 PS |
1220 | if (!S_ISREG(st.st_mode)) |
1221 | return -EEXIST; | |
1222 | ||
c10d6bdb | 1223 | return TAKE_FD(fd); |
60252446 PS |
1224 | } |
1225 | ||
916abb21 LP |
1226 | static int mq_address_create( |
1227 | const char *path, | |
1228 | mode_t mq_mode, | |
1229 | long maxmsg, | |
e8da24a6 | 1230 | long msgsize) { |
916abb21 | 1231 | |
254d1313 | 1232 | _cleanup_close_ int fd = -EBADF; |
916abb21 LP |
1233 | struct stat st; |
1234 | mode_t old_mask; | |
1235 | struct mq_attr _attr, *attr = NULL; | |
1236 | ||
1237 | assert(path); | |
916abb21 LP |
1238 | |
1239 | if (maxmsg > 0 && msgsize > 0) { | |
e8da24a6 LP |
1240 | _attr = (struct mq_attr) { |
1241 | .mq_flags = O_NONBLOCK, | |
1242 | .mq_maxmsg = maxmsg, | |
1243 | .mq_msgsize = msgsize, | |
1244 | }; | |
916abb21 LP |
1245 | attr = &_attr; |
1246 | } | |
1247 | ||
1248 | /* Enforce the right access mode for the mq */ | |
7be9df7d | 1249 | old_mask = umask(~mq_mode); |
916abb21 LP |
1250 | |
1251 | /* Include the original umask in our mask */ | |
e8da24a6 | 1252 | (void) umask(~mq_mode | old_mask); |
916abb21 | 1253 | fd = mq_open(path, O_RDONLY|O_CLOEXEC|O_NONBLOCK|O_CREAT, mq_mode, attr); |
e8da24a6 | 1254 | (void) umask(old_mask); |
916abb21 | 1255 | |
e8da24a6 LP |
1256 | if (fd < 0) |
1257 | return -errno; | |
916abb21 | 1258 | |
e8da24a6 LP |
1259 | if (fstat(fd, &st) < 0) |
1260 | return -errno; | |
916abb21 LP |
1261 | |
1262 | if ((st.st_mode & 0777) != (mq_mode & ~old_mask) || | |
1263 | st.st_uid != getuid() || | |
e8da24a6 LP |
1264 | st.st_gid != getgid()) |
1265 | return -EEXIST; | |
916abb21 | 1266 | |
c10d6bdb | 1267 | return TAKE_FD(fd); |
916abb21 LP |
1268 | } |
1269 | ||
811ba7a0 LP |
1270 | static int socket_symlink(Socket *s) { |
1271 | const char *p; | |
95f7fbbf | 1272 | int r; |
811ba7a0 LP |
1273 | |
1274 | assert(s); | |
1275 | ||
1276 | p = socket_find_symlink_target(s); | |
1277 | if (!p) | |
1278 | return 0; | |
1279 | ||
95f7fbbf | 1280 | STRV_FOREACH(i, s->symlinks) { |
1af87ab7 LP |
1281 | (void) mkdir_parents_label(*i, s->directory_mode); |
1282 | ||
6c9c51e5 | 1283 | r = symlink_idempotent(p, *i, false); |
22b20752 LP |
1284 | |
1285 | if (r == -EEXIST && s->remove_on_stop) { | |
1286 | /* If there's already something where we want to create the symlink, and the destructive | |
1287 | * RemoveOnStop= mode is set, then we might as well try to remove what already exists and try | |
1288 | * again. */ | |
1289 | ||
1290 | if (unlink(*i) >= 0) | |
6c9c51e5 | 1291 | r = symlink_idempotent(p, *i, false); |
22b20752 LP |
1292 | } |
1293 | ||
95f7fbbf | 1294 | if (r < 0) |
e2341b6b DT |
1295 | log_unit_warning_errno(UNIT(s), r, "Failed to create symlink %s %s %s, ignoring: %m", |
1296 | p, special_glyph(SPECIAL_GLYPH_ARROW_RIGHT), *i); | |
95f7fbbf | 1297 | } |
811ba7a0 LP |
1298 | |
1299 | return 0; | |
1300 | } | |
1301 | ||
36078102 | 1302 | static int usbffs_write_descs(int fd, Service *s) { |
6b7e5923 PS |
1303 | int r; |
1304 | ||
1305 | if (!s->usb_function_descriptors || !s->usb_function_strings) | |
1306 | return -EINVAL; | |
1307 | ||
1c876927 | 1308 | r = copy_file_fd(s->usb_function_descriptors, fd, 0); |
6b7e5923 | 1309 | if (r < 0) |
e8da24a6 | 1310 | return r; |
6b7e5923 | 1311 | |
1c876927 | 1312 | return copy_file_fd(s->usb_function_strings, fd, 0); |
6b7e5923 PS |
1313 | } |
1314 | ||
36078102 | 1315 | static int usbffs_select_ep(const struct dirent *d) { |
60252446 PS |
1316 | return d->d_name[0] != '.' && !streq(d->d_name, "ep0"); |
1317 | } | |
1318 | ||
36078102 | 1319 | static int usbffs_dispatch_eps(SocketPort *p) { |
60252446 | 1320 | _cleanup_free_ struct dirent **ent = NULL; |
fe96c0f8 | 1321 | size_t n, k; |
da6053d0 | 1322 | int r; |
60252446 | 1323 | |
00bb64ec | 1324 | r = scandir(p->path, &ent, usbffs_select_ep, alphasort); |
60252446 PS |
1325 | if (r < 0) |
1326 | return -errno; | |
1327 | ||
da6053d0 | 1328 | n = (size_t) r; |
60252446 | 1329 | p->auxiliary_fds = new(int, n); |
0de48764 YW |
1330 | if (!p->auxiliary_fds) { |
1331 | r = -ENOMEM; | |
1332 | goto clear; | |
1333 | } | |
60252446 PS |
1334 | |
1335 | p->n_auxiliary_fds = n; | |
1336 | ||
1337 | k = 0; | |
fe96c0f8 | 1338 | for (size_t i = 0; i < n; ++i) { |
60252446 PS |
1339 | _cleanup_free_ char *ep = NULL; |
1340 | ||
00bb64ec | 1341 | ep = path_make_absolute(ent[i]->d_name, p->path); |
0de48764 YW |
1342 | if (!ep) { |
1343 | r = -ENOMEM; | |
1344 | goto fail; | |
1345 | } | |
60252446 | 1346 | |
4ff361cc | 1347 | path_simplify(ep); |
60252446 | 1348 | |
36078102 | 1349 | r = usbffs_address_create(ep); |
60252446 PS |
1350 | if (r < 0) |
1351 | goto fail; | |
1352 | ||
da6053d0 | 1353 | p->auxiliary_fds[k++] = r; |
60252446 PS |
1354 | } |
1355 | ||
0de48764 YW |
1356 | r = 0; |
1357 | goto clear; | |
60252446 PS |
1358 | |
1359 | fail: | |
e8da24a6 | 1360 | close_many(p->auxiliary_fds, k); |
60252446 PS |
1361 | p->auxiliary_fds = mfree(p->auxiliary_fds); |
1362 | p->n_auxiliary_fds = 0; | |
1363 | ||
0de48764 | 1364 | clear: |
24ae45cb | 1365 | free_many((void**) ent, n); |
60252446 PS |
1366 | return r; |
1367 | } | |
1368 | ||
934ef6a5 ZJS |
1369 | int socket_load_service_unit(Socket *s, int cfd, Unit **ret) { |
1370 | /* Figure out what the unit that will be used to handle the connections on the socket looks like. | |
1371 | * | |
1372 | * If cfd < 0, then we don't have a connection yet. In case of Accept=yes sockets, use a fake | |
1373 | * instance name. | |
1374 | */ | |
1375 | ||
1376 | if (UNIT_ISSET(s->service)) { | |
1377 | *ret = UNIT_DEREF(s->service); | |
1378 | return 0; | |
1379 | } | |
1380 | ||
1381 | if (!s->accept) | |
1382 | return -ENODATA; | |
1383 | ||
1384 | /* Build the instance name and load the unit */ | |
1385 | _cleanup_free_ char *prefix = NULL, *instance = NULL, *name = NULL; | |
1386 | int r; | |
1387 | ||
1388 | r = unit_name_to_prefix(UNIT(s)->id, &prefix); | |
1389 | if (r < 0) | |
1390 | return r; | |
1391 | ||
1392 | if (cfd >= 0) { | |
1393 | r = instance_from_socket(cfd, s->n_accepted, &instance); | |
8dfb0ef1 DL |
1394 | if (r < 0) { |
1395 | if (ERRNO_IS_DISCONNECT(r)) | |
1396 | /* ENOTCONN is legitimate if TCP RST was received. Other socket families might return | |
1397 | * different errors. This connection is over, but the socket unit lives on. */ | |
1398 | return log_unit_debug_errno(UNIT(s), r, | |
1399 | "Got %s on incoming socket, assuming aborted connection attempt, ignoring.", | |
1400 | errno_to_name(r)); | |
934ef6a5 | 1401 | return r; |
8dfb0ef1 | 1402 | } |
934ef6a5 ZJS |
1403 | } |
1404 | ||
1405 | /* For accepting sockets, we don't know how the instance will be called until we get a connection and | |
1406 | * can figure out what the peer name is. So let's use "internal" as the instance to make it clear | |
1407 | * that this is not an actual peer name. We use "unknown" when we cannot figure out the peer. */ | |
1408 | r = unit_name_build(prefix, instance ?: "internal", ".service", &name); | |
1409 | if (r < 0) | |
1410 | return r; | |
1411 | ||
1412 | return manager_load_unit(UNIT(s)->manager, name, NULL, NULL, ret); | |
1413 | } | |
1414 | ||
d24e561d | 1415 | static int socket_determine_selinux_label(Socket *s, char **ret) { |
d24e561d LP |
1416 | int r; |
1417 | ||
1418 | assert(s); | |
1419 | assert(ret); | |
1420 | ||
29dbc62d TT |
1421 | Unit *service; |
1422 | ExecCommand *c; | |
1423 | const char *exec_context; | |
1424 | _cleanup_free_ char *path = NULL; | |
1425 | ||
1426 | r = socket_load_service_unit(s, -1, &service); | |
1427 | if (r == -ENODATA) | |
1428 | goto no_label; | |
1429 | if (r < 0) | |
1430 | return r; | |
d24e561d | 1431 | |
29dbc62d TT |
1432 | exec_context = SERVICE(service)->exec_context.selinux_context; |
1433 | if (exec_context) { | |
1434 | char *con; | |
599b3849 | 1435 | |
29dbc62d TT |
1436 | con = strdup(exec_context); |
1437 | if (!con) | |
1438 | return -ENOMEM; | |
599b3849 | 1439 | |
29dbc62d TT |
1440 | *ret = TAKE_PTR(con); |
1441 | return 0; | |
1442 | } | |
d24e561d | 1443 | |
29dbc62d TT |
1444 | c = SERVICE(service)->exec_command[SERVICE_EXEC_START]; |
1445 | if (!c) | |
1446 | goto no_label; | |
2ef044ea | 1447 | |
f461a28d | 1448 | r = chase(c->path, SERVICE(service)->exec_context.root_directory, CHASE_PREFIX_ROOT, &path, NULL); |
29dbc62d TT |
1449 | if (r < 0) |
1450 | goto no_label; | |
d24e561d | 1451 | |
29dbc62d TT |
1452 | r = mac_selinux_get_create_label_from_exe(path, ret); |
1453 | if (IN_SET(r, -EPERM, -EOPNOTSUPP)) | |
1454 | goto no_label; | |
d24e561d LP |
1455 | return r; |
1456 | ||
1457 | no_label: | |
1458 | *ret = NULL; | |
1459 | return 0; | |
1460 | } | |
1461 | ||
a79279c7 LP |
1462 | static int socket_address_listen_do( |
1463 | Socket *s, | |
1464 | const SocketAddress *address, | |
1465 | const char *label) { | |
1466 | ||
1467 | assert(s); | |
1468 | assert(address); | |
1469 | ||
1470 | return socket_address_listen( | |
1471 | address, | |
1472 | SOCK_CLOEXEC|SOCK_NONBLOCK, | |
1473 | s->backlog, | |
1474 | s->bind_ipv6_only, | |
1475 | s->bind_to_device, | |
1476 | s->reuse_port, | |
1477 | s->free_bind, | |
1478 | s->transparent, | |
1479 | s->directory_mode, | |
1480 | s->socket_mode, | |
1481 | label); | |
1482 | } | |
1483 | ||
65486032 YW |
1484 | #define log_address_error_errno(u, address, error, fmt) \ |
1485 | ({ \ | |
1486 | _cleanup_free_ char *_t = NULL; \ | |
1487 | \ | |
1488 | (void) socket_address_print(address, &_t); \ | |
1489 | log_unit_error_errno(u, error, fmt, strna(_t)); \ | |
1490 | }) | |
ae05e1b6 | 1491 | |
7619cb32 LP |
1492 | static int fork_needed(const SocketAddress *address, const ExecContext *context) { |
1493 | int r; | |
1494 | ||
1495 | assert(address); | |
1496 | assert(context); | |
1497 | ||
1498 | /* Check if we need to do the cgroup or netns stuff. If not we can do things much simpler. */ | |
1499 | ||
1500 | if (IN_SET(address->sockaddr.sa.sa_family, AF_INET, AF_INET6)) { | |
1501 | r = bpf_firewall_supported(); | |
1502 | if (r < 0) | |
1503 | return r; | |
1504 | if (r != BPF_FIREWALL_UNSUPPORTED) /* If BPF firewalling isn't supported anyway — there's no point in this forking complexity */ | |
1505 | return true; | |
1506 | } | |
1507 | ||
fbbb9697 | 1508 | return exec_needs_network_namespace(context); |
7619cb32 LP |
1509 | } |
1510 | ||
a79279c7 LP |
1511 | static int socket_address_listen_in_cgroup( |
1512 | Socket *s, | |
1513 | const SocketAddress *address, | |
1514 | const char *label) { | |
1515 | ||
4775b55d | 1516 | _cleanup_(pidref_done) PidRef pid = PIDREF_NULL; |
19ee48a6 | 1517 | _cleanup_close_pair_ int pair[2] = PIPE_EBADF; |
a79279c7 | 1518 | int fd, r; |
a79279c7 LP |
1519 | |
1520 | assert(s); | |
1521 | assert(address); | |
1522 | ||
7619cb32 LP |
1523 | /* This is a wrapper around socket_address_listen(), that forks off a helper process inside the |
1524 | * socket's cgroup and network namespace in which the socket is actually created. This way we ensure | |
1525 | * the socket is actually properly attached to the unit's cgroup for the purpose of BPF filtering and | |
1526 | * such. */ | |
a79279c7 | 1527 | |
7619cb32 | 1528 | r = fork_needed(address, &s->exec_context); |
a79279c7 LP |
1529 | if (r < 0) |
1530 | return r; | |
7619cb32 LP |
1531 | if (r == 0) { |
1532 | /* Shortcut things... */ | |
1533 | fd = socket_address_listen_do(s, address, label); | |
1534 | if (fd < 0) | |
1535 | return log_address_error_errno(UNIT(s), address, fd, "Failed to create listening socket (%s): %m"); | |
1536 | ||
1537 | return fd; | |
1538 | } | |
1539 | ||
1540 | r = unit_setup_exec_runtime(UNIT(s)); | |
1541 | if (r < 0) | |
1542 | return log_unit_error_errno(UNIT(s), r, "Failed acquire runtime: %m"); | |
1543 | ||
1544 | if (s->exec_context.network_namespace_path && | |
1545 | s->exec_runtime && | |
28135da3 DDM |
1546 | s->exec_runtime->shared && |
1547 | s->exec_runtime->shared->netns_storage_socket[0] >= 0) { | |
1548 | r = open_shareable_ns_path(s->exec_runtime->shared->netns_storage_socket, s->exec_context.network_namespace_path, CLONE_NEWNET); | |
7619cb32 LP |
1549 | if (r < 0) |
1550 | return log_unit_error_errno(UNIT(s), r, "Failed to open network namespace path %s: %m", s->exec_context.network_namespace_path); | |
1551 | } | |
a79279c7 | 1552 | |
a70581ff XR |
1553 | if (s->exec_context.ipc_namespace_path && |
1554 | s->exec_runtime && | |
28135da3 DDM |
1555 | s->exec_runtime->shared && |
1556 | s->exec_runtime->shared->ipcns_storage_socket[0] >= 0) { | |
1557 | r = open_shareable_ns_path(s->exec_runtime->shared->ipcns_storage_socket, s->exec_context.ipc_namespace_path, CLONE_NEWIPC); | |
a70581ff XR |
1558 | if (r < 0) |
1559 | return log_unit_error_errno(UNIT(s), r, "Failed to open IPC namespace path %s: %m", s->exec_context.ipc_namespace_path); | |
1560 | } | |
1561 | ||
a79279c7 LP |
1562 | if (socketpair(AF_UNIX, SOCK_SEQPACKET|SOCK_CLOEXEC, 0, pair) < 0) |
1563 | return log_unit_error_errno(UNIT(s), errno, "Failed to create communication channel: %m"); | |
1564 | ||
4c253ed1 | 1565 | r = unit_fork_helper_process(UNIT(s), "(sd-listen)", &pid); |
a79279c7 LP |
1566 | if (r < 0) |
1567 | return log_unit_error_errno(UNIT(s), r, "Failed to fork off listener stub process: %m"); | |
1568 | if (r == 0) { | |
1569 | /* Child */ | |
1570 | ||
1571 | pair[0] = safe_close(pair[0]); | |
1572 | ||
fbbb9697 | 1573 | if (exec_needs_network_namespace(&s->exec_context) && |
7619cb32 | 1574 | s->exec_runtime && |
28135da3 DDM |
1575 | s->exec_runtime->shared && |
1576 | s->exec_runtime->shared->netns_storage_socket[0] >= 0) { | |
7619cb32 LP |
1577 | |
1578 | if (ns_type_supported(NAMESPACE_NET)) { | |
28135da3 | 1579 | r = setup_shareable_ns(s->exec_runtime->shared->netns_storage_socket, CLONE_NEWNET); |
7619cb32 LP |
1580 | if (r < 0) { |
1581 | log_unit_error_errno(UNIT(s), r, "Failed to join network namespace: %m"); | |
1582 | _exit(EXIT_NETWORK); | |
1583 | } | |
1584 | } else if (s->exec_context.network_namespace_path) { | |
1585 | log_unit_error(UNIT(s), "Network namespace path configured but network namespaces not supported."); | |
1586 | _exit(EXIT_NETWORK); | |
1587 | } else | |
1588 | log_unit_warning(UNIT(s), "PrivateNetwork=yes is configured, but the kernel does not support network namespaces, ignoring."); | |
1589 | } | |
1590 | ||
a79279c7 LP |
1591 | fd = socket_address_listen_do(s, address, label); |
1592 | if (fd < 0) { | |
ae05e1b6 | 1593 | log_address_error_errno(UNIT(s), address, fd, "Failed to create listening socket (%s): %m"); |
a79279c7 LP |
1594 | _exit(EXIT_FAILURE); |
1595 | } | |
1596 | ||
1597 | r = send_one_fd(pair[1], fd, 0); | |
1598 | if (r < 0) { | |
ae05e1b6 | 1599 | log_address_error_errno(UNIT(s), address, r, "Failed to send listening socket (%s) to parent: %m"); |
a79279c7 LP |
1600 | _exit(EXIT_FAILURE); |
1601 | } | |
1602 | ||
1603 | _exit(EXIT_SUCCESS); | |
1604 | } | |
1605 | ||
1606 | pair[1] = safe_close(pair[1]); | |
1607 | fd = receive_one_fd(pair[0], 0); | |
1608 | ||
1609 | /* We synchronously wait for the helper, as it shouldn't be slow */ | |
4775b55d | 1610 | r = wait_for_terminate_and_check("(sd-listen)", pid.pid, WAIT_LOG_ABNORMAL); |
a79279c7 LP |
1611 | if (r < 0) { |
1612 | safe_close(fd); | |
1613 | return r; | |
1614 | } | |
1615 | ||
1616 | if (fd < 0) | |
ae05e1b6 | 1617 | return log_address_error_errno(UNIT(s), address, fd, "Failed to receive listening socket (%s): %m"); |
a79279c7 LP |
1618 | |
1619 | return fd; | |
a79279c7 LP |
1620 | } |
1621 | ||
fd421c4a | 1622 | DEFINE_TRIVIAL_CLEANUP_FUNC_FULL(Socket *, socket_close_fds, NULL); |
e5417345 | 1623 | |
75db809a ZJS |
1624 | static int socket_open_fds(Socket *orig_s) { |
1625 | _cleanup_(socket_close_fdsp) Socket *s = orig_s; | |
710a6b50 LP |
1626 | _cleanup_(mac_selinux_freep) char *label = NULL; |
1627 | bool know_label = false; | |
83c60c9f LP |
1628 | int r; |
1629 | ||
1630 | assert(s); | |
1631 | ||
034c6ed7 | 1632 | LIST_FOREACH(port, p, s->ports) { |
83c60c9f | 1633 | |
034c6ed7 LP |
1634 | if (p->fd >= 0) |
1635 | continue; | |
83c60c9f | 1636 | |
00411a13 LP |
1637 | switch (p->type) { |
1638 | ||
1639 | case SOCKET_SOCKET: | |
049f8642 | 1640 | |
7f416dae | 1641 | if (!know_label) { |
934ef6a5 ZJS |
1642 | /* Figure out the label, if we don't it know yet. We do it once for the first |
1643 | * socket where we need this and remember it for the rest. */ | |
7f416dae | 1644 | |
d24e561d LP |
1645 | r = socket_determine_selinux_label(s, &label); |
1646 | if (r < 0) | |
ae05e1b6 | 1647 | return log_unit_error_errno(UNIT(s), r, "Failed to determine SELinux label: %m"); |
049f8642 LP |
1648 | |
1649 | know_label = true; | |
1650 | } | |
1651 | ||
74bb646e | 1652 | /* Apply the socket protocol */ |
d24e561d | 1653 | switch (p->address.type) { |
d2a50e3b | 1654 | |
74bb646e SS |
1655 | case SOCK_STREAM: |
1656 | case SOCK_SEQPACKET: | |
d24e561d LP |
1657 | if (s->socket_protocol == IPPROTO_SCTP) |
1658 | p->address.protocol = s->socket_protocol; | |
74bb646e | 1659 | break; |
d2a50e3b | 1660 | |
74bb646e | 1661 | case SOCK_DGRAM: |
d24e561d LP |
1662 | if (s->socket_protocol == IPPROTO_UDPLITE) |
1663 | p->address.protocol = s->socket_protocol; | |
74bb646e SS |
1664 | break; |
1665 | } | |
1666 | ||
d501e52b YW |
1667 | p->fd = socket_address_listen_in_cgroup(s, &p->address, label); |
1668 | if (p->fd < 0) | |
1669 | return p->fd; | |
83c60c9f | 1670 | |
5d0fe423 | 1671 | socket_apply_socket_options(s, p, p->fd); |
811ba7a0 | 1672 | socket_symlink(s); |
00411a13 | 1673 | break; |
4fd5948e | 1674 | |
00411a13 | 1675 | case SOCKET_SPECIAL: |
b0a3f2bc | 1676 | |
d501e52b YW |
1677 | p->fd = special_address_create(p->path, s->writable); |
1678 | if (p->fd < 0) | |
1679 | return log_unit_error_errno(UNIT(s), p->fd, "Failed to open special file %s: %m", p->path); | |
00411a13 | 1680 | break; |
b0a3f2bc | 1681 | |
00411a13 | 1682 | case SOCKET_FIFO: |
83c60c9f | 1683 | |
d501e52b | 1684 | p->fd = fifo_address_create( |
175a3d25 LP |
1685 | p->path, |
1686 | s->directory_mode, | |
e8da24a6 | 1687 | s->socket_mode); |
d501e52b YW |
1688 | if (p->fd < 0) |
1689 | return log_unit_error_errno(UNIT(s), p->fd, "Failed to open FIFO %s: %m", p->path); | |
83c60c9f | 1690 | |
b15bdda8 | 1691 | socket_apply_fifo_options(s, p->fd); |
811ba7a0 | 1692 | socket_symlink(s); |
00411a13 | 1693 | break; |
811ba7a0 | 1694 | |
00411a13 | 1695 | case SOCKET_MQUEUE: |
83c60c9f | 1696 | |
d501e52b | 1697 | p->fd = mq_address_create( |
175a3d25 LP |
1698 | p->path, |
1699 | s->socket_mode, | |
1700 | s->mq_maxmsg, | |
e8da24a6 | 1701 | s->mq_msgsize); |
d501e52b YW |
1702 | if (p->fd < 0) |
1703 | return log_unit_error_errno(UNIT(s), p->fd, "Failed to open message queue %s: %m", p->path); | |
00411a13 | 1704 | break; |
e8da24a6 | 1705 | |
d2a50e3b | 1706 | case SOCKET_USB_FUNCTION: { |
27a6ea91 | 1707 | _cleanup_free_ char *ep = NULL; |
60252446 | 1708 | |
27a6ea91 | 1709 | ep = path_make_absolute("ep0", p->path); |
72585a58 YW |
1710 | if (!ep) |
1711 | return -ENOMEM; | |
27a6ea91 | 1712 | |
d501e52b YW |
1713 | p->fd = usbffs_address_create(ep); |
1714 | if (p->fd < 0) | |
1715 | return p->fd; | |
60252446 | 1716 | |
36078102 | 1717 | r = usbffs_write_descs(p->fd, SERVICE(UNIT_DEREF(s->service))); |
6b7e5923 | 1718 | if (r < 0) |
e5417345 | 1719 | return r; |
6b7e5923 | 1720 | |
36078102 | 1721 | r = usbffs_dispatch_eps(p); |
60252446 | 1722 | if (r < 0) |
e5417345 | 1723 | return r; |
00411a13 LP |
1724 | |
1725 | break; | |
27a6ea91 | 1726 | } |
00411a13 | 1727 | default: |
04499a70 | 1728 | assert_not_reached(); |
00411a13 | 1729 | } |
034c6ed7 LP |
1730 | } |
1731 | ||
e5417345 | 1732 | s = NULL; |
034c6ed7 | 1733 | return 0; |
034c6ed7 LP |
1734 | } |
1735 | ||
1736 | static void socket_unwatch_fds(Socket *s) { | |
718db961 | 1737 | int r; |
9152c765 | 1738 | |
034c6ed7 LP |
1739 | assert(s); |
1740 | ||
1741 | LIST_FOREACH(port, p, s->ports) { | |
1742 | if (p->fd < 0) | |
1743 | continue; | |
1744 | ||
a4152e3f LP |
1745 | if (!p->event_source) |
1746 | continue; | |
1747 | ||
1748 | r = sd_event_source_set_enabled(p->event_source, SD_EVENT_OFF); | |
1749 | if (r < 0) | |
f2341e0a | 1750 | log_unit_debug_errno(UNIT(s), r, "Failed to disable event source: %m"); |
83c60c9f | 1751 | } |
034c6ed7 LP |
1752 | } |
1753 | ||
1754 | static int socket_watch_fds(Socket *s) { | |
034c6ed7 LP |
1755 | int r; |
1756 | ||
1757 | assert(s); | |
83c60c9f | 1758 | |
034c6ed7 LP |
1759 | LIST_FOREACH(port, p, s->ports) { |
1760 | if (p->fd < 0) | |
1761 | continue; | |
1762 | ||
cbf60d0a | 1763 | if (p->event_source) { |
718db961 | 1764 | r = sd_event_source_set_enabled(p->event_source, SD_EVENT_ON); |
cbf60d0a LP |
1765 | if (r < 0) |
1766 | goto fail; | |
1767 | } else { | |
151b9b96 | 1768 | r = sd_event_add_io(UNIT(s)->manager->event, &p->event_source, p->fd, EPOLLIN, socket_dispatch_io, p); |
cbf60d0a LP |
1769 | if (r < 0) |
1770 | goto fail; | |
4f2d528d | 1771 | |
cbf60d0a | 1772 | (void) sd_event_source_set_description(p->event_source, "socket-port-io"); |
718db961 | 1773 | } |
2bec84e7 LP |
1774 | |
1775 | r = sd_event_source_set_ratelimit(p->event_source, s->poll_limit_interval, s->poll_limit_burst); | |
1776 | if (r < 0) | |
1777 | log_unit_debug_errno(UNIT(s), r, "Failed to set poll limit on I/O event source, ignoring: %m"); | |
034c6ed7 | 1778 | } |
83c60c9f | 1779 | |
542563ba | 1780 | return 0; |
83c60c9f | 1781 | |
034c6ed7 | 1782 | fail: |
cbf60d0a | 1783 | log_unit_warning_errno(UNIT(s), r, "Failed to watch listening fds: %m"); |
034c6ed7 LP |
1784 | socket_unwatch_fds(s); |
1785 | return r; | |
1786 | } | |
1787 | ||
01a8b467 LP |
1788 | enum { |
1789 | SOCKET_OPEN_NONE, | |
1790 | SOCKET_OPEN_SOME, | |
1791 | SOCKET_OPEN_ALL, | |
1792 | }; | |
1793 | ||
1794 | static int socket_check_open(Socket *s) { | |
1795 | bool have_open = false, have_closed = false; | |
01a8b467 LP |
1796 | |
1797 | assert(s); | |
1798 | ||
1799 | LIST_FOREACH(port, p, s->ports) { | |
1800 | if (p->fd < 0) | |
1801 | have_closed = true; | |
1802 | else | |
1803 | have_open = true; | |
1804 | ||
1805 | if (have_open && have_closed) | |
1806 | return SOCKET_OPEN_SOME; | |
1807 | } | |
1808 | ||
1809 | if (have_open) | |
1810 | return SOCKET_OPEN_ALL; | |
1811 | ||
1812 | return SOCKET_OPEN_NONE; | |
1813 | } | |
1814 | ||
034c6ed7 LP |
1815 | static void socket_set_state(Socket *s, SocketState state) { |
1816 | SocketState old_state; | |
1817 | assert(s); | |
1818 | ||
6fcbec6f LP |
1819 | if (s->state != state) |
1820 | bus_unit_send_pending_change_signal(UNIT(s), false); | |
1821 | ||
034c6ed7 LP |
1822 | old_state = s->state; |
1823 | s->state = state; | |
1824 | ||
bd1fe7c7 LP |
1825 | if (!IN_SET(state, |
1826 | SOCKET_START_PRE, | |
3900e5fd | 1827 | SOCKET_START_CHOWN, |
bd1fe7c7 LP |
1828 | SOCKET_START_POST, |
1829 | SOCKET_STOP_PRE, | |
1830 | SOCKET_STOP_PRE_SIGTERM, | |
1831 | SOCKET_STOP_PRE_SIGKILL, | |
1832 | SOCKET_STOP_POST, | |
1833 | SOCKET_FINAL_SIGTERM, | |
c968d76a YW |
1834 | SOCKET_FINAL_SIGKILL, |
1835 | SOCKET_CLEANING)) { | |
718db961 | 1836 | |
5dcadb4c | 1837 | s->timer_event_source = sd_event_source_disable_unref(s->timer_event_source); |
5e94833f | 1838 | socket_unwatch_control_pid(s); |
034c6ed7 | 1839 | s->control_command = NULL; |
a16e1123 | 1840 | s->control_command_id = _SOCKET_EXEC_COMMAND_INVALID; |
e537352b | 1841 | } |
034c6ed7 | 1842 | |
a16e1123 LP |
1843 | if (state != SOCKET_LISTENING) |
1844 | socket_unwatch_fds(s); | |
1845 | ||
bd1fe7c7 | 1846 | if (!IN_SET(state, |
3900e5fd | 1847 | SOCKET_START_CHOWN, |
bd1fe7c7 LP |
1848 | SOCKET_START_POST, |
1849 | SOCKET_LISTENING, | |
1850 | SOCKET_RUNNING, | |
1851 | SOCKET_STOP_PRE, | |
1852 | SOCKET_STOP_PRE_SIGTERM, | |
c968d76a YW |
1853 | SOCKET_STOP_PRE_SIGKILL, |
1854 | SOCKET_CLEANING)) | |
034c6ed7 LP |
1855 | socket_close_fds(s); |
1856 | ||
e537352b | 1857 | if (state != old_state) |
f2341e0a | 1858 | log_unit_debug(UNIT(s), "Changed %s -> %s", socket_state_to_string(old_state), socket_state_to_string(state)); |
acbb0225 | 1859 | |
96b09de5 | 1860 | unit_notify(UNIT(s), state_translation_table[old_state], state_translation_table[state], /* reload_success = */ true); |
034c6ed7 LP |
1861 | } |
1862 | ||
be847e82 | 1863 | static int socket_coldplug(Unit *u) { |
a16e1123 LP |
1864 | Socket *s = SOCKET(u); |
1865 | int r; | |
1866 | ||
1867 | assert(s); | |
1868 | assert(s->state == SOCKET_DEAD); | |
1869 | ||
e821075a LP |
1870 | if (s->deserialized_state == s->state) |
1871 | return 0; | |
a16e1123 | 1872 | |
43a19142 LP |
1873 | if (pidref_is_set(&s->control_pid) && |
1874 | pid_is_unwaited(s->control_pid.pid) && | |
c386f588 | 1875 | IN_SET(s->deserialized_state, |
3900e5fd LP |
1876 | SOCKET_START_PRE, |
1877 | SOCKET_START_CHOWN, | |
1878 | SOCKET_START_POST, | |
1879 | SOCKET_STOP_PRE, | |
1880 | SOCKET_STOP_PRE_SIGTERM, | |
1881 | SOCKET_STOP_PRE_SIGKILL, | |
1882 | SOCKET_STOP_POST, | |
1883 | SOCKET_FINAL_SIGTERM, | |
c968d76a YW |
1884 | SOCKET_FINAL_SIGKILL, |
1885 | SOCKET_CLEANING)) { | |
a16e1123 | 1886 | |
43a19142 | 1887 | r = unit_watch_pid(UNIT(s), s->control_pid.pid, /* exclusive= */ false); |
e821075a LP |
1888 | if (r < 0) |
1889 | return r; | |
a16e1123 | 1890 | |
36c16a7c | 1891 | r = socket_arm_timer(s, usec_add(u->state_change_timestamp.monotonic, s->timeout_usec)); |
e821075a LP |
1892 | if (r < 0) |
1893 | return r; | |
1894 | } | |
a16e1123 | 1895 | |
3900e5fd LP |
1896 | if (IN_SET(s->deserialized_state, |
1897 | SOCKET_START_CHOWN, | |
1898 | SOCKET_START_POST, | |
1899 | SOCKET_LISTENING, | |
01a8b467 LP |
1900 | SOCKET_RUNNING)) { |
1901 | ||
1902 | /* Originally, we used to simply reopen all sockets here that we didn't have file descriptors | |
5238e957 | 1903 | * for. However, this is problematic, as we won't traverse through the SOCKET_START_CHOWN state for |
01a8b467 LP |
1904 | * them, and thus the UID/GID wouldn't be right. Hence, instead simply check if we have all fds open, |
1905 | * and if there's a mismatch, warn loudly. */ | |
1906 | ||
1907 | r = socket_check_open(s); | |
1908 | if (r == SOCKET_OPEN_NONE) | |
1909 | log_unit_warning(UNIT(s), | |
1910 | "Socket unit configuration has changed while unit has been running, " | |
1911 | "no open socket file descriptor left. " | |
1912 | "The socket unit is not functional until restarted."); | |
1913 | else if (r == SOCKET_OPEN_SOME) | |
1914 | log_unit_warning(UNIT(s), | |
1915 | "Socket unit configuration has changed while unit has been running, " | |
1916 | "and some socket file descriptors have not been opened yet. " | |
1917 | "The socket unit is not fully functional until restarted."); | |
e821075a | 1918 | } |
a16e1123 | 1919 | |
e821075a LP |
1920 | if (s->deserialized_state == SOCKET_LISTENING) { |
1921 | r = socket_watch_fds(s); | |
1922 | if (r < 0) | |
1923 | return r; | |
a16e1123 LP |
1924 | } |
1925 | ||
15220772 | 1926 | if (!IN_SET(s->deserialized_state, SOCKET_DEAD, SOCKET_FAILED, SOCKET_CLEANING)) |
e8a565cb | 1927 | (void) unit_setup_exec_runtime(u); |
29206d46 | 1928 | |
e821075a | 1929 | socket_set_state(s, s->deserialized_state); |
a16e1123 LP |
1930 | return 0; |
1931 | } | |
1932 | ||
43a19142 | 1933 | static int socket_spawn(Socket *s, ExecCommand *c, PidRef *ret_pid) { |
3c7416b6 | 1934 | |
b9c04eaf | 1935 | _cleanup_(exec_params_clear) ExecParameters exec_params = { |
5686391b | 1936 | .flags = EXEC_APPLY_SANDBOXING|EXEC_APPLY_CHROOT|EXEC_APPLY_TTY_STDIN, |
254d1313 ZJS |
1937 | .stdin_fd = -EBADF, |
1938 | .stdout_fd = -EBADF, | |
1939 | .stderr_fd = -EBADF, | |
1940 | .exec_fd = -EBADF, | |
9fa95f85 | 1941 | }; |
43a19142 | 1942 | _cleanup_(pidref_done) PidRef pidref = PIDREF_NULL; |
3c7416b6 LP |
1943 | pid_t pid; |
1944 | int r; | |
034c6ed7 LP |
1945 | |
1946 | assert(s); | |
1947 | assert(c); | |
43a19142 | 1948 | assert(ret_pid); |
034c6ed7 | 1949 | |
3c7416b6 | 1950 | r = unit_prepare_exec(UNIT(s)); |
29206d46 LP |
1951 | if (r < 0) |
1952 | return r; | |
1953 | ||
36c16a7c | 1954 | r = socket_arm_timer(s, usec_add(now(CLOCK_MONOTONIC), s->timeout_usec)); |
36697dc0 | 1955 | if (r < 0) |
36c16a7c | 1956 | return r; |
034c6ed7 | 1957 | |
1ad6e8b3 LP |
1958 | r = unit_set_exec_params(UNIT(s), &exec_params); |
1959 | if (r < 0) | |
1960 | return r; | |
3536f49e | 1961 | |
f2341e0a LP |
1962 | r = exec_spawn(UNIT(s), |
1963 | c, | |
9e2f7c11 | 1964 | &s->exec_context, |
9fa95f85 | 1965 | &exec_params, |
613b411c | 1966 | s->exec_runtime, |
6bb00842 | 1967 | &s->cgroup_context, |
9e2f7c11 | 1968 | &pid); |
cee288ad | 1969 | if (r < 0) |
36c16a7c | 1970 | return r; |
9e2f7c11 | 1971 | |
43a19142 | 1972 | r = pidref_set_pid(&pidref, pid); |
9e2f7c11 | 1973 | if (r < 0) |
36c16a7c | 1974 | return r; |
034c6ed7 | 1975 | |
43a19142 LP |
1976 | r = unit_watch_pid(UNIT(s), pidref.pid, /* exclusive= */ true); |
1977 | if (r < 0) | |
1978 | return r; | |
3536f49e | 1979 | |
43a19142 | 1980 | *ret_pid = TAKE_PIDREF(pidref); |
3900e5fd | 1981 | return 0; |
3900e5fd LP |
1982 | } |
1983 | ||
43a19142 | 1984 | static int socket_chown(Socket *s, PidRef *ret_pid) { |
4775b55d | 1985 | _cleanup_(pidref_done) PidRef pid = PIDREF_NULL; |
3900e5fd LP |
1986 | int r; |
1987 | ||
43a19142 LP |
1988 | assert(s); |
1989 | ||
36c16a7c | 1990 | r = socket_arm_timer(s, usec_add(now(CLOCK_MONOTONIC), s->timeout_usec)); |
3900e5fd | 1991 | if (r < 0) |
894a30ef | 1992 | return r; |
3900e5fd LP |
1993 | |
1994 | /* We have to resolve the user names out-of-process, hence | |
1995 | * let's fork here. It's messy, but well, what can we do? */ | |
1996 | ||
4c253ed1 | 1997 | r = unit_fork_helper_process(UNIT(s), "(sd-chown)", &pid); |
a79279c7 LP |
1998 | if (r < 0) |
1999 | return r; | |
2000 | if (r == 0) { | |
fed1e721 LP |
2001 | uid_t uid = UID_INVALID; |
2002 | gid_t gid = GID_INVALID; | |
3900e5fd | 2003 | |
a79279c7 | 2004 | /* Child */ |
3900e5fd LP |
2005 | |
2006 | if (!isempty(s->user)) { | |
2007 | const char *user = s->user; | |
2008 | ||
fafff8f1 | 2009 | r = get_user_creds(&user, &uid, &gid, NULL, NULL, 0); |
3900e5fd | 2010 | if (r < 0) { |
a79279c7 LP |
2011 | log_unit_error_errno(UNIT(s), r, "Failed to resolve user %s: %m", user); |
2012 | _exit(EXIT_USER); | |
3900e5fd LP |
2013 | } |
2014 | } | |
2015 | ||
2016 | if (!isempty(s->group)) { | |
2017 | const char *group = s->group; | |
2018 | ||
fafff8f1 | 2019 | r = get_group_creds(&group, &gid, 0); |
3900e5fd | 2020 | if (r < 0) { |
a79279c7 LP |
2021 | log_unit_error_errno(UNIT(s), r, "Failed to resolve group %s: %m", group); |
2022 | _exit(EXIT_GROUP); | |
3900e5fd LP |
2023 | } |
2024 | } | |
2025 | ||
2026 | LIST_FOREACH(port, p, s->ports) { | |
e5a1c18d | 2027 | const char *path = NULL; |
3900e5fd LP |
2028 | |
2029 | if (p->type == SOCKET_SOCKET) | |
2030 | path = socket_address_get_path(&p->address); | |
2031 | else if (p->type == SOCKET_FIFO) | |
2032 | path = p->path; | |
2033 | ||
2034 | if (!path) | |
2035 | continue; | |
2036 | ||
2037 | if (chown(path, uid, gid) < 0) { | |
a79279c7 LP |
2038 | log_unit_error_errno(UNIT(s), errno, "Failed to chown(): %m"); |
2039 | _exit(EXIT_CHOWN); | |
3900e5fd LP |
2040 | } |
2041 | } | |
2042 | ||
a79279c7 | 2043 | _exit(EXIT_SUCCESS); |
3900e5fd LP |
2044 | } |
2045 | ||
4775b55d | 2046 | r = unit_watch_pid(UNIT(s), pid.pid, /* exclusive= */ true); |
718db961 | 2047 | if (r < 0) |
894a30ef | 2048 | return r; |
83c60c9f | 2049 | |
4775b55d | 2050 | *ret_pid = TAKE_PIDREF(pid); |
034c6ed7 | 2051 | return 0; |
542563ba LP |
2052 | } |
2053 | ||
cfc4eb4c | 2054 | static void socket_enter_dead(Socket *s, SocketResult f) { |
034c6ed7 LP |
2055 | assert(s); |
2056 | ||
a0fef983 | 2057 | if (s->result == SOCKET_SUCCESS) |
cfc4eb4c | 2058 | s->result = f; |
034c6ed7 | 2059 | |
523ee2d4 LP |
2060 | if (s->result == SOCKET_SUCCESS) |
2061 | unit_log_success(UNIT(s)); | |
2062 | else | |
7c047d74 | 2063 | unit_log_failure(UNIT(s), socket_result_to_string(s->result)); |
ed77d407 | 2064 | |
4c425434 LP |
2065 | unit_warn_leftover_processes(UNIT(s), unit_log_leftover_process_stop); |
2066 | ||
29206d46 LP |
2067 | socket_set_state(s, s->result != SOCKET_SUCCESS ? SOCKET_FAILED : SOCKET_DEAD); |
2068 | ||
28135da3 | 2069 | s->exec_runtime = exec_runtime_destroy(s->exec_runtime); |
613b411c | 2070 | |
bb0c0d6f | 2071 | unit_destroy_runtime_data(UNIT(s), &s->exec_context); |
e66cf1a3 | 2072 | |
00d9ef85 | 2073 | unit_unref_uid_gid(UNIT(s), true); |
034c6ed7 LP |
2074 | } |
2075 | ||
cfc4eb4c | 2076 | static void socket_enter_signal(Socket *s, SocketState state, SocketResult f); |
80876c20 | 2077 | |
cfc4eb4c | 2078 | static void socket_enter_stop_post(Socket *s, SocketResult f) { |
034c6ed7 LP |
2079 | int r; |
2080 | assert(s); | |
2081 | ||
a0fef983 | 2082 | if (s->result == SOCKET_SUCCESS) |
cfc4eb4c | 2083 | s->result = f; |
034c6ed7 | 2084 | |
5e94833f | 2085 | socket_unwatch_control_pid(s); |
a16e1123 | 2086 | s->control_command_id = SOCKET_EXEC_STOP_POST; |
3900e5fd | 2087 | s->control_command = s->exec_command[SOCKET_EXEC_STOP_POST]; |
a16e1123 | 2088 | |
3900e5fd | 2089 | if (s->control_command) { |
43a19142 LP |
2090 | pidref_done(&s->control_pid); |
2091 | ||
3900e5fd LP |
2092 | r = socket_spawn(s, s->control_command, &s->control_pid); |
2093 | if (r < 0) | |
034c6ed7 LP |
2094 | goto fail; |
2095 | ||
80876c20 LP |
2096 | socket_set_state(s, SOCKET_STOP_POST); |
2097 | } else | |
cfc4eb4c | 2098 | socket_enter_signal(s, SOCKET_FINAL_SIGTERM, SOCKET_SUCCESS); |
034c6ed7 LP |
2099 | |
2100 | return; | |
2101 | ||
2102 | fail: | |
f2341e0a | 2103 | log_unit_warning_errno(UNIT(s), r, "Failed to run 'stop-post' task: %m"); |
cfc4eb4c | 2104 | socket_enter_signal(s, SOCKET_FINAL_SIGTERM, SOCKET_FAILURE_RESOURCES); |
034c6ed7 LP |
2105 | } |
2106 | ||
a232ebcc ZJS |
2107 | static int state_to_kill_operation(Socket *s, SocketState state) { |
2108 | if (state == SOCKET_STOP_PRE_SIGTERM && unit_has_job_type(UNIT(s), JOB_RESTART)) | |
2109 | return KILL_RESTART; | |
2110 | ||
2111 | if (state == SOCKET_FINAL_SIGTERM) | |
2112 | return KILL_TERMINATE; | |
2113 | ||
2114 | return KILL_KILL; | |
2115 | } | |
2116 | ||
cfc4eb4c | 2117 | static void socket_enter_signal(Socket *s, SocketState state, SocketResult f) { |
034c6ed7 LP |
2118 | int r; |
2119 | ||
2120 | assert(s); | |
2121 | ||
a0fef983 | 2122 | if (s->result == SOCKET_SUCCESS) |
cfc4eb4c | 2123 | s->result = f; |
034c6ed7 | 2124 | |
cd2086fe LP |
2125 | r = unit_kill_context( |
2126 | UNIT(s), | |
2127 | &s->kill_context, | |
a232ebcc | 2128 | state_to_kill_operation(s, state), |
7901288a LP |
2129 | /* main_pid= */ NULL, |
2130 | &s->control_pid, | |
2131 | /* main_pid_alien= */ false); | |
cd2086fe LP |
2132 | if (r < 0) |
2133 | goto fail; | |
034c6ed7 | 2134 | |
cd2086fe | 2135 | if (r > 0) { |
36c16a7c | 2136 | r = socket_arm_timer(s, usec_add(now(CLOCK_MONOTONIC), s->timeout_usec)); |
36697dc0 | 2137 | if (r < 0) |
80876c20 | 2138 | goto fail; |
d6ea93e3 | 2139 | |
80876c20 | 2140 | socket_set_state(s, state); |
ac84d1fb LP |
2141 | } else if (state == SOCKET_STOP_PRE_SIGTERM) |
2142 | socket_enter_signal(s, SOCKET_STOP_PRE_SIGKILL, SOCKET_SUCCESS); | |
2143 | else if (state == SOCKET_STOP_PRE_SIGKILL) | |
cfc4eb4c | 2144 | socket_enter_stop_post(s, SOCKET_SUCCESS); |
ac84d1fb LP |
2145 | else if (state == SOCKET_FINAL_SIGTERM) |
2146 | socket_enter_signal(s, SOCKET_FINAL_SIGKILL, SOCKET_SUCCESS); | |
80876c20 | 2147 | else |
cfc4eb4c | 2148 | socket_enter_dead(s, SOCKET_SUCCESS); |
034c6ed7 LP |
2149 | |
2150 | return; | |
2151 | ||
2152 | fail: | |
f2341e0a | 2153 | log_unit_warning_errno(UNIT(s), r, "Failed to kill processes: %m"); |
034c6ed7 | 2154 | |
3742095b | 2155 | if (IN_SET(state, SOCKET_STOP_PRE_SIGTERM, SOCKET_STOP_PRE_SIGKILL)) |
cfc4eb4c | 2156 | socket_enter_stop_post(s, SOCKET_FAILURE_RESOURCES); |
034c6ed7 | 2157 | else |
cfc4eb4c | 2158 | socket_enter_dead(s, SOCKET_FAILURE_RESOURCES); |
034c6ed7 LP |
2159 | } |
2160 | ||
cfc4eb4c | 2161 | static void socket_enter_stop_pre(Socket *s, SocketResult f) { |
034c6ed7 LP |
2162 | int r; |
2163 | assert(s); | |
2164 | ||
a0fef983 | 2165 | if (s->result == SOCKET_SUCCESS) |
cfc4eb4c | 2166 | s->result = f; |
034c6ed7 | 2167 | |
5e94833f | 2168 | socket_unwatch_control_pid(s); |
a16e1123 | 2169 | s->control_command_id = SOCKET_EXEC_STOP_PRE; |
3900e5fd | 2170 | s->control_command = s->exec_command[SOCKET_EXEC_STOP_PRE]; |
a16e1123 | 2171 | |
3900e5fd | 2172 | if (s->control_command) { |
43a19142 LP |
2173 | pidref_done(&s->control_pid); |
2174 | ||
3900e5fd LP |
2175 | r = socket_spawn(s, s->control_command, &s->control_pid); |
2176 | if (r < 0) | |
034c6ed7 LP |
2177 | goto fail; |
2178 | ||
80876c20 LP |
2179 | socket_set_state(s, SOCKET_STOP_PRE); |
2180 | } else | |
cfc4eb4c | 2181 | socket_enter_stop_post(s, SOCKET_SUCCESS); |
034c6ed7 LP |
2182 | |
2183 | return; | |
2184 | ||
2185 | fail: | |
f2341e0a | 2186 | log_unit_warning_errno(UNIT(s), r, "Failed to run 'stop-pre' task: %m"); |
cfc4eb4c | 2187 | socket_enter_stop_post(s, SOCKET_FAILURE_RESOURCES); |
034c6ed7 LP |
2188 | } |
2189 | ||
e9af15c3 LP |
2190 | static void socket_enter_listening(Socket *s) { |
2191 | int r; | |
2192 | assert(s); | |
2193 | ||
3e5f04bf RM |
2194 | if (!s->accept && s->flush_pending) { |
2195 | log_unit_debug(UNIT(s), "Flushing socket before listening."); | |
2196 | flush_ports(s); | |
2197 | } | |
2198 | ||
cfc4eb4c LP |
2199 | r = socket_watch_fds(s); |
2200 | if (r < 0) { | |
f2341e0a | 2201 | log_unit_warning_errno(UNIT(s), r, "Failed to watch sockets: %m"); |
e9af15c3 LP |
2202 | goto fail; |
2203 | } | |
2204 | ||
2205 | socket_set_state(s, SOCKET_LISTENING); | |
2206 | return; | |
2207 | ||
2208 | fail: | |
cfc4eb4c | 2209 | socket_enter_stop_pre(s, SOCKET_FAILURE_RESOURCES); |
e9af15c3 LP |
2210 | } |
2211 | ||
034c6ed7 LP |
2212 | static void socket_enter_start_post(Socket *s) { |
2213 | int r; | |
2214 | assert(s); | |
2215 | ||
3900e5fd LP |
2216 | socket_unwatch_control_pid(s); |
2217 | s->control_command_id = SOCKET_EXEC_START_POST; | |
2218 | s->control_command = s->exec_command[SOCKET_EXEC_START_POST]; | |
2219 | ||
2220 | if (s->control_command) { | |
43a19142 LP |
2221 | pidref_done(&s->control_pid); |
2222 | ||
3900e5fd LP |
2223 | r = socket_spawn(s, s->control_command, &s->control_pid); |
2224 | if (r < 0) { | |
f2341e0a | 2225 | log_unit_warning_errno(UNIT(s), r, "Failed to run 'start-post' task: %m"); |
3900e5fd LP |
2226 | goto fail; |
2227 | } | |
2228 | ||
2229 | socket_set_state(s, SOCKET_START_POST); | |
2230 | } else | |
2231 | socket_enter_listening(s); | |
2232 | ||
2233 | return; | |
2234 | ||
2235 | fail: | |
2236 | socket_enter_stop_pre(s, SOCKET_FAILURE_RESOURCES); | |
2237 | } | |
2238 | ||
2239 | static void socket_enter_start_chown(Socket *s) { | |
2240 | int r; | |
2241 | ||
2242 | assert(s); | |
2243 | ||
cfc4eb4c LP |
2244 | r = socket_open_fds(s); |
2245 | if (r < 0) { | |
f2341e0a | 2246 | log_unit_warning_errno(UNIT(s), r, "Failed to listen on sockets: %m"); |
034c6ed7 LP |
2247 | goto fail; |
2248 | } | |
2249 | ||
3900e5fd | 2250 | if (!isempty(s->user) || !isempty(s->group)) { |
5e94833f | 2251 | |
3900e5fd LP |
2252 | socket_unwatch_control_pid(s); |
2253 | s->control_command_id = SOCKET_EXEC_START_CHOWN; | |
2254 | s->control_command = NULL; | |
a16e1123 | 2255 | |
3900e5fd | 2256 | r = socket_chown(s, &s->control_pid); |
cfc4eb4c | 2257 | if (r < 0) { |
f2341e0a | 2258 | log_unit_warning_errno(UNIT(s), r, "Failed to fork 'start-chown' task: %m"); |
034c6ed7 LP |
2259 | goto fail; |
2260 | } | |
2261 | ||
3900e5fd | 2262 | socket_set_state(s, SOCKET_START_CHOWN); |
80876c20 | 2263 | } else |
3900e5fd | 2264 | socket_enter_start_post(s); |
034c6ed7 LP |
2265 | |
2266 | return; | |
2267 | ||
2268 | fail: | |
cfc4eb4c | 2269 | socket_enter_stop_pre(s, SOCKET_FAILURE_RESOURCES); |
034c6ed7 LP |
2270 | } |
2271 | ||
2272 | static void socket_enter_start_pre(Socket *s) { | |
2273 | int r; | |
2274 | assert(s); | |
2275 | ||
5e94833f | 2276 | socket_unwatch_control_pid(s); |
a4634b21 | 2277 | |
4c425434 | 2278 | unit_warn_leftover_processes(UNIT(s), unit_log_leftover_process_start); |
a4634b21 | 2279 | |
a16e1123 | 2280 | s->control_command_id = SOCKET_EXEC_START_PRE; |
3900e5fd | 2281 | s->control_command = s->exec_command[SOCKET_EXEC_START_PRE]; |
a16e1123 | 2282 | |
3900e5fd | 2283 | if (s->control_command) { |
43a19142 LP |
2284 | pidref_done(&s->control_pid); |
2285 | ||
e821075a | 2286 | r = socket_spawn(s, s->control_command, &s->control_pid); |
3900e5fd | 2287 | if (r < 0) { |
f2341e0a | 2288 | log_unit_warning_errno(UNIT(s), r, "Failed to run 'start-pre' task: %m"); |
034c6ed7 | 2289 | goto fail; |
3900e5fd | 2290 | } |
034c6ed7 | 2291 | |
80876c20 LP |
2292 | socket_set_state(s, SOCKET_START_PRE); |
2293 | } else | |
3900e5fd | 2294 | socket_enter_start_chown(s); |
034c6ed7 LP |
2295 | |
2296 | return; | |
2297 | ||
2298 | fail: | |
cfc4eb4c | 2299 | socket_enter_dead(s, SOCKET_FAILURE_RESOURCES); |
034c6ed7 LP |
2300 | } |
2301 | ||
60d9771c | 2302 | static void flush_ports(Socket *s) { |
03677889 | 2303 | assert(s); |
60d9771c LP |
2304 | |
2305 | /* Flush all incoming traffic, regardless if actual bytes or new connections, so that this socket isn't busy | |
2306 | * anymore */ | |
2307 | ||
2308 | LIST_FOREACH(port, p, s->ports) { | |
2309 | if (p->fd < 0) | |
2310 | continue; | |
2311 | ||
2312 | (void) flush_accept(p->fd); | |
2313 | (void) flush_fd(p->fd); | |
2314 | } | |
2315 | } | |
2316 | ||
5cf09553 ZJS |
2317 | static void socket_enter_running(Socket *s, int cfd_in) { |
2318 | /* Note that this call takes possession of the connection fd passed. It either has to assign it | |
2319 | * somewhere or close it. */ | |
2320 | _cleanup_close_ int cfd = cfd_in; | |
2321 | ||
4afd3348 | 2322 | _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL; |
034c6ed7 LP |
2323 | int r; |
2324 | ||
2325 | assert(s); | |
2326 | ||
60d9771c | 2327 | /* We don't take connections anymore if we are supposed to shut down anyway */ |
31afa0a4 | 2328 | if (unit_stop_pending(UNIT(s))) { |
e821075a | 2329 | |
f2341e0a | 2330 | log_unit_debug(UNIT(s), "Suppressing connection request since unit stop is scheduled."); |
5d909e3e | 2331 | |
7c610628 | 2332 | if (cfd >= 0) |
a98f7575 | 2333 | goto refuse; |
7c610628 | 2334 | |
5cf09553 | 2335 | flush_ports(s); |
ba3e67a7 LP |
2336 | return; |
2337 | } | |
2338 | ||
7994ac1d | 2339 | if (!ratelimit_below(&s->trigger_limit)) { |
8b26cdbd LP |
2340 | log_unit_warning(UNIT(s), "Trigger limit hit, refusing further activation."); |
2341 | socket_enter_stop_pre(s, SOCKET_FAILURE_TRIGGER_LIMIT_HIT); | |
a98f7575 | 2342 | goto refuse; |
8b26cdbd LP |
2343 | } |
2344 | ||
4f2d528d | 2345 | if (cfd < 0) { |
f976f3f6 | 2346 | bool pending = false; |
eef85c4a | 2347 | Unit *other; |
f976f3f6 | 2348 | |
15ed3c3a LP |
2349 | /* If there's already a start pending don't bother to do anything */ |
2350 | UNIT_FOREACH_DEPENDENCY(other, UNIT(s), UNIT_ATOM_TRIGGERS) | |
e821075a | 2351 | if (unit_active_or_pending(other)) { |
57020a3a LP |
2352 | pending = true; |
2353 | break; | |
2354 | } | |
f976f3f6 | 2355 | |
1a710b43 | 2356 | if (!pending) { |
640ace4a | 2357 | if (!UNIT_ISSET(s->service)) { |
86e045ec ZJS |
2358 | r = log_unit_error_errno(UNIT(s), SYNTHETIC_ERRNO(ENOENT), |
2359 | "Service to activate vanished, refusing activation."); | |
640ace4a LP |
2360 | goto fail; |
2361 | } | |
2362 | ||
50cbaba4 | 2363 | r = manager_add_job(UNIT(s)->manager, JOB_START, UNIT_DEREF(s->service), JOB_REPLACE, NULL, &error, NULL); |
1a710b43 | 2364 | if (r < 0) |
f976f3f6 | 2365 | goto fail; |
1a710b43 | 2366 | } |
4f2d528d LP |
2367 | |
2368 | socket_set_state(s, SOCKET_RUNNING); | |
2369 | } else { | |
9d565427 | 2370 | _cleanup_(socket_peer_unrefp) SocketPeer *p = NULL; |
b669c20f | 2371 | Unit *service; |
4f2d528d | 2372 | |
6cf6bbc2 | 2373 | if (s->n_connections >= s->max_connections) { |
ea8f50f8 | 2374 | log_unit_warning(UNIT(s), "Too many incoming connections (%u), dropping connection.", |
166cf510 | 2375 | s->n_connections); |
a98f7575 | 2376 | goto refuse; |
6cf6bbc2 LP |
2377 | } |
2378 | ||
9d565427 | 2379 | if (s->max_connections_per_source > 0) { |
166cf510 | 2380 | r = socket_acquire_peer(s, cfd, &p); |
d5f8890b DL |
2381 | if (r < 0) { |
2382 | if (ERRNO_IS_DISCONNECT(r)) | |
2383 | return; | |
2384 | /* We didn't have enough resources to acquire peer information, let's fail. */ | |
86e045ec | 2385 | goto fail; |
d5f8890b | 2386 | } |
934ef6a5 | 2387 | if (r > 0 && p->n_ref > s->max_connections_per_source) { |
ea8f50f8 ZJS |
2388 | _cleanup_free_ char *t = NULL; |
2389 | ||
41733ae1 | 2390 | (void) sockaddr_pretty(&p->peer.sa, p->peer_salen, true, false, &t); |
ea8f50f8 | 2391 | |
166cf510 | 2392 | log_unit_warning(UNIT(s), |
ea8f50f8 ZJS |
2393 | "Too many incoming connections (%u) from source %s, dropping connection.", |
2394 | p->n_ref, strnull(t)); | |
a98f7575 | 2395 | goto refuse; |
9d565427 SS |
2396 | } |
2397 | } | |
2398 | ||
b669c20f | 2399 | r = socket_load_service_unit(s, cfd, &service); |
8dfb0ef1 DL |
2400 | if (r < 0) { |
2401 | if (ERRNO_IS_DISCONNECT(r)) | |
2402 | return; | |
4f2d528d | 2403 | goto fail; |
8dfb0ef1 | 2404 | } |
b15bdda8 | 2405 | |
b669c20f ZJS |
2406 | r = unit_add_two_dependencies(UNIT(s), UNIT_BEFORE, UNIT_TRIGGERS, service, |
2407 | false, UNIT_DEPENDENCY_IMPLICIT); | |
2408 | if (r < 0) | |
2409 | goto fail; | |
6c073082 | 2410 | |
e4f67317 | 2411 | s->n_accepted++; |
b15bdda8 | 2412 | |
3fabebf4 | 2413 | r = service_set_socket_fd(SERVICE(service), cfd, s, p, s->selinux_context_from_net); |
8dfb0ef1 DL |
2414 | if (r < 0) { |
2415 | if (ERRNO_IS_DISCONNECT(r)) | |
2416 | return; | |
4f2d528d | 2417 | goto fail; |
8dfb0ef1 | 2418 | } |
4f2d528d | 2419 | |
934ef6a5 | 2420 | TAKE_FD(cfd); /* We passed ownership of the fd to the service now. Forget it here. */ |
313cefa1 | 2421 | s->n_connections++; |
6cf6bbc2 | 2422 | |
b669c20f | 2423 | r = manager_add_job(UNIT(s)->manager, JOB_START, service, JOB_REPLACE, NULL, &error, NULL); |
3e7a1f50 | 2424 | if (r < 0) { |
934ef6a5 ZJS |
2425 | /* We failed to activate the new service, but it still exists. Let's make sure the |
2426 | * service closes and forgets the connection fd again, immediately. */ | |
81a1d6d6 | 2427 | service_release_socket_fd(SERVICE(service)); |
4f2d528d | 2428 | goto fail; |
3e7a1f50 | 2429 | } |
c4e2ceae LP |
2430 | |
2431 | /* Notify clients about changed counters */ | |
2432 | unit_add_to_dbus_queue(UNIT(s)); | |
4f2d528d | 2433 | } |
034c6ed7 | 2434 | |
034c6ed7 LP |
2435 | return; |
2436 | ||
a98f7575 MM |
2437 | refuse: |
2438 | s->n_refused++; | |
a98f7575 MM |
2439 | return; |
2440 | ||
034c6ed7 | 2441 | fail: |
86e045ec ZJS |
2442 | if (ERRNO_IS_RESOURCE(r)) |
2443 | log_unit_warning(UNIT(s), "Failed to queue service startup job: %s", | |
2444 | bus_error_message(&error, r)); | |
2445 | else | |
2446 | log_unit_warning(UNIT(s), "Failed to queue service startup job (Maybe the service file is missing or not a %s unit?): %s", | |
2447 | cfd >= 0 ? "template" : "non-template", | |
2448 | bus_error_message(&error, r)); | |
e821075a | 2449 | |
60089004 | 2450 | socket_enter_stop_pre(s, SOCKET_FAILURE_RESOURCES); |
034c6ed7 LP |
2451 | } |
2452 | ||
cfc4eb4c | 2453 | static void socket_run_next(Socket *s) { |
034c6ed7 LP |
2454 | int r; |
2455 | ||
2456 | assert(s); | |
2457 | assert(s->control_command); | |
2458 | assert(s->control_command->command_next); | |
2459 | ||
5e94833f LP |
2460 | socket_unwatch_control_pid(s); |
2461 | ||
034c6ed7 LP |
2462 | s->control_command = s->control_command->command_next; |
2463 | ||
43a19142 LP |
2464 | pidref_done(&s->control_pid); |
2465 | ||
e821075a LP |
2466 | r = socket_spawn(s, s->control_command, &s->control_pid); |
2467 | if (r < 0) | |
034c6ed7 LP |
2468 | goto fail; |
2469 | ||
2470 | return; | |
2471 | ||
2472 | fail: | |
f2341e0a | 2473 | log_unit_warning_errno(UNIT(s), r, "Failed to run next task: %m"); |
80876c20 LP |
2474 | |
2475 | if (s->state == SOCKET_START_POST) | |
cfc4eb4c | 2476 | socket_enter_stop_pre(s, SOCKET_FAILURE_RESOURCES); |
034c6ed7 | 2477 | else if (s->state == SOCKET_STOP_POST) |
cfc4eb4c | 2478 | socket_enter_dead(s, SOCKET_FAILURE_RESOURCES); |
034c6ed7 | 2479 | else |
cfc4eb4c | 2480 | socket_enter_signal(s, SOCKET_FINAL_SIGTERM, SOCKET_FAILURE_RESOURCES); |
034c6ed7 LP |
2481 | } |
2482 | ||
87f0e418 LP |
2483 | static int socket_start(Unit *u) { |
2484 | Socket *s = SOCKET(u); | |
07299350 | 2485 | int r; |
83c60c9f LP |
2486 | |
2487 | assert(s); | |
2488 | ||
034c6ed7 LP |
2489 | /* We cannot fulfill this request right now, try again later |
2490 | * please! */ | |
3900e5fd LP |
2491 | if (IN_SET(s->state, |
2492 | SOCKET_STOP_PRE, | |
2493 | SOCKET_STOP_PRE_SIGKILL, | |
2494 | SOCKET_STOP_PRE_SIGTERM, | |
2495 | SOCKET_STOP_POST, | |
2496 | SOCKET_FINAL_SIGTERM, | |
c968d76a YW |
2497 | SOCKET_FINAL_SIGKILL, |
2498 | SOCKET_CLEANING)) | |
034c6ed7 LP |
2499 | return -EAGAIN; |
2500 | ||
a4152e3f | 2501 | /* Already on it! */ |
3900e5fd LP |
2502 | if (IN_SET(s->state, |
2503 | SOCKET_START_PRE, | |
2504 | SOCKET_START_CHOWN, | |
2505 | SOCKET_START_POST)) | |
034c6ed7 | 2506 | return 0; |
83c60c9f | 2507 | |
034c6ed7 | 2508 | /* Cannot run this without the service being around */ |
9444b1f2 | 2509 | if (UNIT_ISSET(s->service)) { |
57020a3a LP |
2510 | Service *service; |
2511 | ||
2512 | service = SERVICE(UNIT_DEREF(s->service)); | |
2513 | ||
d85ff944 | 2514 | if (UNIT(service)->load_state != UNIT_LOADED) |
c068650f MY |
2515 | return log_unit_error_errno(u, SYNTHETIC_ERRNO(ENOENT), |
2516 | "Socket service %s not loaded, refusing.", UNIT(service)->id); | |
4f2d528d | 2517 | |
35b8ca3a | 2518 | /* If the service is already active we cannot start the |
4f2d528d | 2519 | * socket */ |
c068650f MY |
2520 | if (!IN_SET(service->state, |
2521 | SERVICE_DEAD, SERVICE_DEAD_BEFORE_AUTO_RESTART, SERVICE_FAILED, SERVICE_FAILED_BEFORE_AUTO_RESTART, | |
2522 | SERVICE_AUTO_RESTART, SERVICE_AUTO_RESTART_QUEUED)) | |
2523 | return log_unit_error_errno(u, SYNTHETIC_ERRNO(EBUSY), | |
2524 | "Socket service %s already active, refusing.", UNIT(service)->id); | |
4f2d528d | 2525 | } |
e537352b | 2526 | |
3742095b | 2527 | assert(IN_SET(s->state, SOCKET_DEAD, SOCKET_FAILED)); |
83c60c9f | 2528 | |
4b58153d LP |
2529 | r = unit_acquire_invocation_id(u); |
2530 | if (r < 0) | |
2531 | return r; | |
2532 | ||
cfc4eb4c | 2533 | s->result = SOCKET_SUCCESS; |
6a1d4d9f | 2534 | exec_command_reset_status_list_array(s->exec_command, _SOCKET_EXEC_COMMAND_MAX); |
3c7416b6 LP |
2535 | |
2536 | u->reset_accounting = true; | |
5ad096b3 | 2537 | |
034c6ed7 | 2538 | socket_enter_start_pre(s); |
82a2b6bb | 2539 | return 1; |
034c6ed7 | 2540 | } |
83c60c9f | 2541 | |
87f0e418 LP |
2542 | static int socket_stop(Unit *u) { |
2543 | Socket *s = SOCKET(u); | |
034c6ed7 LP |
2544 | |
2545 | assert(s); | |
2546 | ||
e537352b | 2547 | /* Already on it */ |
3900e5fd LP |
2548 | if (IN_SET(s->state, |
2549 | SOCKET_STOP_PRE, | |
2550 | SOCKET_STOP_PRE_SIGTERM, | |
2551 | SOCKET_STOP_PRE_SIGKILL, | |
2552 | SOCKET_STOP_POST, | |
2553 | SOCKET_FINAL_SIGTERM, | |
2554 | SOCKET_FINAL_SIGKILL)) | |
e537352b LP |
2555 | return 0; |
2556 | ||
3f6c78dc LP |
2557 | /* If there's already something running we go directly into |
2558 | * kill mode. */ | |
3900e5fd LP |
2559 | if (IN_SET(s->state, |
2560 | SOCKET_START_PRE, | |
2561 | SOCKET_START_CHOWN, | |
2562 | SOCKET_START_POST)) { | |
cfc4eb4c | 2563 | socket_enter_signal(s, SOCKET_STOP_PRE_SIGTERM, SOCKET_SUCCESS); |
3f6c78dc LP |
2564 | return -EAGAIN; |
2565 | } | |
2566 | ||
c968d76a YW |
2567 | /* If we are currently cleaning, then abort it, brutally. */ |
2568 | if (s->state == SOCKET_CLEANING) { | |
2569 | socket_enter_signal(s, SOCKET_FINAL_SIGKILL, SOCKET_SUCCESS); | |
2570 | return 0; | |
2571 | } | |
2572 | ||
3742095b | 2573 | assert(IN_SET(s->state, SOCKET_LISTENING, SOCKET_RUNNING)); |
83c60c9f | 2574 | |
cfc4eb4c | 2575 | socket_enter_stop_pre(s, SOCKET_SUCCESS); |
82a2b6bb | 2576 | return 1; |
542563ba LP |
2577 | } |
2578 | ||
a16e1123 LP |
2579 | static int socket_serialize(Unit *u, FILE *f, FDSet *fds) { |
2580 | Socket *s = SOCKET(u); | |
a16e1123 LP |
2581 | int r; |
2582 | ||
2583 | assert(u); | |
2584 | assert(f); | |
2585 | assert(fds); | |
2586 | ||
d68c645b LP |
2587 | (void) serialize_item(f, "state", socket_state_to_string(s->state)); |
2588 | (void) serialize_item(f, "result", socket_result_to_string(s->result)); | |
2589 | (void) serialize_item_format(f, "n-accepted", "%u", s->n_accepted); | |
2590 | (void) serialize_item_format(f, "n-refused", "%u", s->n_refused); | |
a16e1123 | 2591 | |
43a19142 LP |
2592 | if (pidref_is_set(&s->control_pid)) |
2593 | (void) serialize_item_format(f, "control-pid", PID_FMT, s->control_pid.pid); | |
a16e1123 LP |
2594 | |
2595 | if (s->control_command_id >= 0) | |
d68c645b | 2596 | (void) serialize_item(f, "control-command", socket_exec_command_to_string(s->control_command_id)); |
a16e1123 LP |
2597 | |
2598 | LIST_FOREACH(port, p, s->ports) { | |
2599 | int copy; | |
2600 | ||
2601 | if (p->fd < 0) | |
2602 | continue; | |
2603 | ||
613b411c LP |
2604 | copy = fdset_put_dup(fds, p->fd); |
2605 | if (copy < 0) | |
fc2d74ab | 2606 | return log_unit_warning_errno(u, copy, "Failed to serialize socket fd: %m"); |
a16e1123 LP |
2607 | |
2608 | if (p->type == SOCKET_SOCKET) { | |
613b411c | 2609 | _cleanup_free_ char *t = NULL; |
a16e1123 | 2610 | |
ee092817 LP |
2611 | r = socket_address_print(&p->address, &t); |
2612 | if (r < 0) | |
fc2d74ab | 2613 | return log_unit_error_errno(u, r, "Failed to format socket address: %m"); |
a16e1123 | 2614 | |
7a22745a | 2615 | if (socket_address_family(&p->address) == AF_NETLINK) |
d68c645b | 2616 | (void) serialize_item_format(f, "netlink", "%i %s", copy, t); |
7a22745a | 2617 | else |
d68c645b | 2618 | (void) serialize_item_format(f, "socket", "%i %i %s", copy, p->address.type, t); |
b0a3f2bc | 2619 | } else if (p->type == SOCKET_SPECIAL) |
d68c645b | 2620 | (void) serialize_item_format(f, "special", "%i %s", copy, p->path); |
ee092817 | 2621 | else if (p->type == SOCKET_MQUEUE) |
d68c645b | 2622 | (void) serialize_item_format(f, "mqueue", "%i %s", copy, p->path); |
60252446 | 2623 | else if (p->type == SOCKET_USB_FUNCTION) |
d68c645b | 2624 | (void) serialize_item_format(f, "ffs", "%i %s", copy, p->path); |
b0a3f2bc | 2625 | else { |
a16e1123 | 2626 | assert(p->type == SOCKET_FIFO); |
d68c645b | 2627 | (void) serialize_item_format(f, "fifo", "%i %s", copy, p->path); |
a16e1123 LP |
2628 | } |
2629 | } | |
2630 | ||
2631 | return 0; | |
2632 | } | |
2633 | ||
2634 | static int socket_deserialize_item(Unit *u, const char *key, const char *value, FDSet *fds) { | |
2635 | Socket *s = SOCKET(u); | |
77be02ad | 2636 | int r; |
a16e1123 LP |
2637 | |
2638 | assert(u); | |
2639 | assert(key); | |
2640 | assert(value); | |
a16e1123 LP |
2641 | |
2642 | if (streq(key, "state")) { | |
2643 | SocketState state; | |
2644 | ||
ee092817 LP |
2645 | state = socket_state_from_string(value); |
2646 | if (state < 0) | |
f2341e0a | 2647 | log_unit_debug(u, "Failed to parse state value: %s", value); |
a16e1123 LP |
2648 | else |
2649 | s->deserialized_state = state; | |
cfc4eb4c LP |
2650 | } else if (streq(key, "result")) { |
2651 | SocketResult f; | |
a16e1123 | 2652 | |
cfc4eb4c LP |
2653 | f = socket_result_from_string(value); |
2654 | if (f < 0) | |
f2341e0a | 2655 | log_unit_debug(u, "Failed to parse result value: %s", value); |
cfc4eb4c LP |
2656 | else if (f != SOCKET_SUCCESS) |
2657 | s->result = f; | |
a16e1123 LP |
2658 | |
2659 | } else if (streq(key, "n-accepted")) { | |
2660 | unsigned k; | |
2661 | ||
e364ad06 | 2662 | if (safe_atou(value, &k) < 0) |
f2341e0a | 2663 | log_unit_debug(u, "Failed to parse n-accepted value: %s", value); |
a16e1123 LP |
2664 | else |
2665 | s->n_accepted += k; | |
a98f7575 MM |
2666 | } else if (streq(key, "n-refused")) { |
2667 | unsigned k; | |
2668 | ||
2669 | if (safe_atou(value, &k) < 0) | |
2670 | log_unit_debug(u, "Failed to parse n-refused value: %s", value); | |
2671 | else | |
2672 | s->n_refused += k; | |
a16e1123 | 2673 | } else if (streq(key, "control-pid")) { |
43a19142 LP |
2674 | pidref_done(&s->control_pid); |
2675 | r = pidref_set_pidstr(&s->control_pid, value); | |
2676 | if (r < 0) | |
2677 | log_debug_errno(r, "Failed to pin control PID '%s', ignoring: %m", value); | |
a16e1123 LP |
2678 | } else if (streq(key, "control-command")) { |
2679 | SocketExecCommand id; | |
2680 | ||
66870f90 ZJS |
2681 | id = socket_exec_command_from_string(value); |
2682 | if (id < 0) | |
f2341e0a | 2683 | log_unit_debug(u, "Failed to parse exec-command value: %s", value); |
a16e1123 LP |
2684 | else { |
2685 | s->control_command_id = id; | |
2686 | s->control_command = s->exec_command[id]; | |
2687 | } | |
2688 | } else if (streq(key, "fifo")) { | |
77be02ad FS |
2689 | _cleanup_free_ char *fdv = NULL; |
2690 | bool found = false; | |
2691 | int fd; | |
a16e1123 | 2692 | |
77be02ad FS |
2693 | r = extract_first_word(&value, &fdv, NULL, 0); |
2694 | if (r <= 0) { | |
f2341e0a | 2695 | log_unit_debug(u, "Failed to parse fifo value: %s", value); |
77be02ad | 2696 | return 0; |
3da0caf5 | 2697 | } |
b0a3f2bc | 2698 | |
77be02ad FS |
2699 | fd = parse_fd(fdv); |
2700 | if (fd < 0 || !fdset_contains(fds, fd)) { | |
2701 | log_unit_debug(u, "Invalid fifo value: %s", fdv); | |
2702 | return 0; | |
2703 | } | |
2704 | ||
2705 | LIST_FOREACH(port, p, s->ports) | |
2706 | if (p->fd < 0 && | |
2707 | p->type == SOCKET_FIFO && | |
563e6846 | 2708 | path_equal_or_inode_same(p->path, value, 0)) { |
77be02ad FS |
2709 | p->fd = fdset_remove(fds, fd); |
2710 | found = true; | |
2711 | break; | |
2712 | } | |
2713 | if (!found) | |
2714 | log_unit_debug(u, "No matching fifo socket found: %s", value); | |
2715 | ||
b0a3f2bc | 2716 | } else if (streq(key, "special")) { |
77be02ad FS |
2717 | _cleanup_free_ char *fdv = NULL; |
2718 | bool found = false; | |
2719 | int fd; | |
b0a3f2bc | 2720 | |
77be02ad FS |
2721 | r = extract_first_word(&value, &fdv, NULL, 0); |
2722 | if (r <= 0) { | |
f2341e0a | 2723 | log_unit_debug(u, "Failed to parse special value: %s", value); |
77be02ad FS |
2724 | return 0; |
2725 | } | |
2726 | ||
2727 | fd = parse_fd(fdv); | |
2728 | if (fd < 0 || !fdset_contains(fds, fd)) { | |
2729 | log_unit_debug(u, "Invalid special value: %s", fdv); | |
2730 | return 0; | |
3da0caf5 | 2731 | } |
a16e1123 | 2732 | |
77be02ad FS |
2733 | LIST_FOREACH(port, p, s->ports) |
2734 | if (p->fd < 0 && | |
2735 | p->type == SOCKET_SPECIAL && | |
563e6846 | 2736 | path_equal_or_inode_same(p->path, value, 0)) { |
77be02ad FS |
2737 | p->fd = fdset_remove(fds, fd); |
2738 | found = true; | |
2739 | break; | |
2740 | } | |
2741 | if (!found) | |
2742 | log_unit_debug(u, "No matching special socket found: %s", value); | |
2743 | ||
ee092817 | 2744 | } else if (streq(key, "mqueue")) { |
77be02ad FS |
2745 | _cleanup_free_ char *fdv = NULL; |
2746 | bool found = false; | |
2747 | int fd; | |
ee092817 | 2748 | |
77be02ad FS |
2749 | r = extract_first_word(&value, &fdv, NULL, 0); |
2750 | if (r <= 0) { | |
f2341e0a | 2751 | log_unit_debug(u, "Failed to parse mqueue value: %s", value); |
77be02ad | 2752 | return 0; |
3da0caf5 | 2753 | } |
ee092817 | 2754 | |
77be02ad FS |
2755 | fd = parse_fd(fdv); |
2756 | if (fd < 0 || !fdset_contains(fds, fd)) { | |
2757 | log_unit_debug(u, "Invalid mqueue value: %s", fdv); | |
2758 | return 0; | |
2759 | } | |
2760 | ||
2761 | LIST_FOREACH(port, p, s->ports) | |
2762 | if (p->fd < 0 && | |
2763 | p->type == SOCKET_MQUEUE && | |
2764 | streq(p->path, value)) { | |
2765 | p->fd = fdset_remove(fds, fd); | |
2766 | found = true; | |
2767 | break; | |
2768 | } | |
2769 | if (!found) | |
2770 | log_unit_debug(u, "No matching mqueue socket found: %s", value); | |
2771 | ||
a16e1123 | 2772 | } else if (streq(key, "socket")) { |
77be02ad FS |
2773 | _cleanup_free_ char *fdv = NULL, *typev = NULL; |
2774 | bool found = false; | |
2775 | int fd, type; | |
2776 | ||
2777 | r = extract_first_word(&value, &fdv, NULL, 0); | |
2778 | if (r <= 0) { | |
2779 | log_unit_debug(u, "Failed to parse socket fd from value: %s", value); | |
2780 | return 0; | |
2781 | } | |
a16e1123 | 2782 | |
77be02ad FS |
2783 | fd = parse_fd(fdv); |
2784 | if (fd < 0 || !fdset_contains(fds, fd)) { | |
2785 | log_unit_debug(u, "Invalid socket fd: %s", fdv); | |
2786 | return 0; | |
2787 | } | |
2788 | ||
2789 | r = extract_first_word(&value, &typev, NULL, 0); | |
2790 | if (r <= 0) { | |
2791 | log_unit_debug(u, "Failed to parse socket type from value: %s", value); | |
2792 | return 0; | |
2793 | } | |
2794 | ||
2795 | if (safe_atoi(typev, &type) < 0 || type < 0) { | |
2796 | log_unit_debug(u, "Invalid socket type: %s", typev); | |
2797 | return 0; | |
3da0caf5 | 2798 | } |
a16e1123 | 2799 | |
77be02ad FS |
2800 | LIST_FOREACH(port, p, s->ports) |
2801 | if (p->fd < 0 && | |
2802 | socket_address_is(&p->address, value, type)) { | |
2803 | p->fd = fdset_remove(fds, fd); | |
2804 | found = true; | |
2805 | break; | |
2806 | } | |
2807 | if (!found) | |
2808 | log_unit_debug(u, "No matching %s socket found: %s", | |
2809 | socket_address_type_to_string(type), value); | |
2810 | ||
7a22745a | 2811 | } else if (streq(key, "netlink")) { |
77be02ad FS |
2812 | _cleanup_free_ char *fdv = NULL; |
2813 | bool found = false; | |
2814 | int fd; | |
7a22745a | 2815 | |
77be02ad FS |
2816 | r = extract_first_word(&value, &fdv, NULL, 0); |
2817 | if (r <= 0) { | |
f2341e0a | 2818 | log_unit_debug(u, "Failed to parse socket value: %s", value); |
77be02ad | 2819 | return 0; |
3da0caf5 | 2820 | } |
60252446 | 2821 | |
77be02ad FS |
2822 | fd = parse_fd(fdv); |
2823 | if (fd < 0 || !fdset_contains(fds, fd)) { | |
2824 | log_unit_debug(u, "Invalid socket value: %s", fdv); | |
2825 | return 0; | |
2826 | } | |
2827 | ||
2828 | LIST_FOREACH(port, p, s->ports) | |
2829 | if (p->fd < 0 && | |
2830 | socket_address_is_netlink(&p->address, value)) { | |
2831 | p->fd = fdset_remove(fds, fd); | |
2832 | found = true; | |
2833 | break; | |
2834 | } | |
2835 | if (!found) | |
2836 | log_unit_debug(u, "No matching netlink socket found: %s", value); | |
2837 | ||
60252446 | 2838 | } else if (streq(key, "ffs")) { |
77be02ad FS |
2839 | _cleanup_free_ char *fdv = NULL; |
2840 | bool found = false; | |
2841 | int fd; | |
60252446 | 2842 | |
77be02ad FS |
2843 | r = extract_first_word(&value, &fdv, NULL, 0); |
2844 | if (r <= 0) { | |
60252446 | 2845 | log_unit_debug(u, "Failed to parse ffs value: %s", value); |
77be02ad FS |
2846 | return 0; |
2847 | } | |
2848 | ||
2849 | fd = parse_fd(fdv); | |
2850 | if (fd < 0 || !fdset_contains(fds, fd)) { | |
2851 | log_unit_debug(u, "Invalid ffs value: %s", fdv); | |
2852 | return 0; | |
3da0caf5 | 2853 | } |
60252446 | 2854 | |
77be02ad FS |
2855 | LIST_FOREACH(port, p, s->ports) |
2856 | if (p->fd < 0 && | |
2857 | p->type == SOCKET_USB_FUNCTION && | |
563e6846 | 2858 | path_equal_or_inode_same(p->path, value, 0)) { |
77be02ad FS |
2859 | p->fd = fdset_remove(fds, fd); |
2860 | found = true; | |
2861 | break; | |
2862 | } | |
2863 | if (!found) | |
2864 | log_unit_debug(u, "No matching ffs socket found: %s", value); | |
2865 | ||
a16e1123 | 2866 | } else |
f2341e0a | 2867 | log_unit_debug(UNIT(s), "Unknown serialization key: %s", key); |
a16e1123 LP |
2868 | |
2869 | return 0; | |
2870 | } | |
2871 | ||
9ff1a6f1 | 2872 | static void socket_distribute_fds(Unit *u, FDSet *fds) { |
01e10de3 | 2873 | Socket *s = SOCKET(u); |
01e10de3 LP |
2874 | |
2875 | assert(u); | |
2876 | ||
2877 | LIST_FOREACH(port, p, s->ports) { | |
01e10de3 LP |
2878 | int fd; |
2879 | ||
2880 | if (p->type != SOCKET_SOCKET) | |
2881 | continue; | |
2882 | ||
2883 | if (p->fd >= 0) | |
2884 | continue; | |
2885 | ||
90e74a66 | 2886 | FDSET_FOREACH(fd, fds) { |
01e10de3 LP |
2887 | if (socket_address_matches_fd(&p->address, fd)) { |
2888 | p->fd = fdset_remove(fds, fd); | |
2889 | s->deserialized_state = SOCKET_LISTENING; | |
2890 | break; | |
2891 | } | |
2892 | } | |
2893 | } | |
01e10de3 LP |
2894 | } |
2895 | ||
d1e8e8b5 | 2896 | static UnitActiveState socket_active_state(Unit *u) { |
87f0e418 | 2897 | assert(u); |
5cb5a6ff | 2898 | |
acbb0225 | 2899 | return state_translation_table[SOCKET(u)->state]; |
5cb5a6ff LP |
2900 | } |
2901 | ||
d1e8e8b5 | 2902 | static const char *socket_sub_state_to_string(Unit *u) { |
10a94420 LP |
2903 | assert(u); |
2904 | ||
a16e1123 | 2905 | return socket_state_to_string(SOCKET(u)->state); |
10a94420 LP |
2906 | } |
2907 | ||
67419600 OS |
2908 | const char* socket_port_type_to_string(SocketPort *p) { |
2909 | ||
2910 | assert(p); | |
2911 | ||
2912 | switch (p->type) { | |
718db961 LP |
2913 | |
2914 | case SOCKET_SOCKET: | |
2915 | ||
2916 | switch (p->address.type) { | |
2917 | ||
2918 | case SOCK_STREAM: | |
2919 | return "Stream"; | |
2920 | ||
2921 | case SOCK_DGRAM: | |
2922 | return "Datagram"; | |
2923 | ||
2924 | case SOCK_SEQPACKET: | |
2925 | return "SequentialPacket"; | |
2926 | ||
2927 | case SOCK_RAW: | |
2928 | if (socket_address_family(&p->address) == AF_NETLINK) | |
2929 | return "Netlink"; | |
2930 | ||
4831981d | 2931 | _fallthrough_; |
718db961 LP |
2932 | default: |
2933 | return NULL; | |
2934 | } | |
2935 | ||
2936 | case SOCKET_SPECIAL: | |
2937 | return "Special"; | |
2938 | ||
2939 | case SOCKET_MQUEUE: | |
2940 | return "MessageQueue"; | |
2941 | ||
2942 | case SOCKET_FIFO: | |
2943 | return "FIFO"; | |
2944 | ||
60252446 PS |
2945 | case SOCKET_USB_FUNCTION: |
2946 | return "USBFunction"; | |
2947 | ||
718db961 LP |
2948 | default: |
2949 | return NULL; | |
67419600 OS |
2950 | } |
2951 | } | |
2952 | ||
038ed5a4 YW |
2953 | SocketType socket_port_type_from_string(const char *s) { |
2954 | assert(s); | |
2955 | ||
e045e325 YW |
2956 | if (STR_IN_SET(s, "Stream", "Datagram", "SequentialPacket", "Netlink")) |
2957 | return SOCKET_SOCKET; | |
2958 | else if (streq(s, "Special")) | |
2959 | return SOCKET_SPECIAL; | |
2960 | else if (streq(s, "MessageQueue")) | |
2961 | return SOCKET_MQUEUE; | |
2962 | else if (streq(s, "FIFO")) | |
2963 | return SOCKET_FIFO; | |
2964 | else if (streq(s, "USBFunction")) | |
2965 | return SOCKET_USB_FUNCTION; | |
038ed5a4 YW |
2966 | else |
2967 | return _SOCKET_TYPE_INVALID; | |
2968 | } | |
2969 | ||
d1e8e8b5 | 2970 | static bool socket_may_gc(Unit *u) { |
6cf6bbc2 LP |
2971 | Socket *s = SOCKET(u); |
2972 | ||
2973 | assert(u); | |
2974 | ||
f2f725e5 | 2975 | return s->n_connections == 0; |
6cf6bbc2 LP |
2976 | } |
2977 | ||
a79279c7 LP |
2978 | static int socket_accept_do(Socket *s, int fd) { |
2979 | int cfd; | |
2980 | ||
2981 | assert(s); | |
2982 | assert(fd >= 0); | |
2983 | ||
4ff9bc2e LP |
2984 | cfd = accept4(fd, NULL, NULL, SOCK_NONBLOCK|SOCK_CLOEXEC); |
2985 | if (cfd < 0) | |
2986 | /* Convert transient network errors into clean and well-defined EAGAIN */ | |
2987 | return ERRNO_IS_ACCEPT_AGAIN(errno) ? -EAGAIN : -errno; | |
a79279c7 LP |
2988 | |
2989 | return cfd; | |
2990 | } | |
2991 | ||
2992 | static int socket_accept_in_cgroup(Socket *s, SocketPort *p, int fd) { | |
4775b55d | 2993 | _cleanup_(pidref_done) PidRef pid = PIDREF_NULL; |
19ee48a6 | 2994 | _cleanup_close_pair_ int pair[2] = PIPE_EBADF; |
a79279c7 | 2995 | int cfd, r; |
a79279c7 LP |
2996 | |
2997 | assert(s); | |
2998 | assert(p); | |
2999 | assert(fd >= 0); | |
3000 | ||
5238e957 | 3001 | /* Similar to socket_address_listen_in_cgroup(), but for accept() rather than socket(): make sure that any |
a79279c7 LP |
3002 | * connection socket is also properly associated with the cgroup. */ |
3003 | ||
3004 | if (!IN_SET(p->address.sockaddr.sa.sa_family, AF_INET, AF_INET6)) | |
3005 | goto shortcut; | |
3006 | ||
3007 | r = bpf_firewall_supported(); | |
3008 | if (r < 0) | |
3009 | return r; | |
2ae7ee58 | 3010 | if (r == BPF_FIREWALL_UNSUPPORTED) |
a79279c7 LP |
3011 | goto shortcut; |
3012 | ||
3013 | if (socketpair(AF_UNIX, SOCK_SEQPACKET|SOCK_CLOEXEC, 0, pair) < 0) | |
3014 | return log_unit_error_errno(UNIT(s), errno, "Failed to create communication channel: %m"); | |
3015 | ||
4c253ed1 | 3016 | r = unit_fork_helper_process(UNIT(s), "(sd-accept)", &pid); |
a79279c7 LP |
3017 | if (r < 0) |
3018 | return log_unit_error_errno(UNIT(s), r, "Failed to fork off accept stub process: %m"); | |
3019 | if (r == 0) { | |
3020 | /* Child */ | |
3021 | ||
3022 | pair[0] = safe_close(pair[0]); | |
3023 | ||
3024 | cfd = socket_accept_do(s, fd); | |
4ff9bc2e LP |
3025 | if (cfd == -EAGAIN) /* spurious accept() */ |
3026 | _exit(EXIT_SUCCESS); | |
a79279c7 LP |
3027 | if (cfd < 0) { |
3028 | log_unit_error_errno(UNIT(s), cfd, "Failed to accept connection socket: %m"); | |
3029 | _exit(EXIT_FAILURE); | |
3030 | } | |
3031 | ||
3032 | r = send_one_fd(pair[1], cfd, 0); | |
3033 | if (r < 0) { | |
3034 | log_unit_error_errno(UNIT(s), r, "Failed to send connection socket to parent: %m"); | |
3035 | _exit(EXIT_FAILURE); | |
3036 | } | |
3037 | ||
3038 | _exit(EXIT_SUCCESS); | |
3039 | } | |
3040 | ||
3041 | pair[1] = safe_close(pair[1]); | |
3042 | cfd = receive_one_fd(pair[0], 0); | |
3043 | ||
3044 | /* We synchronously wait for the helper, as it shouldn't be slow */ | |
4775b55d | 3045 | r = wait_for_terminate_and_check("(sd-accept)", pid.pid, WAIT_LOG_ABNORMAL); |
a79279c7 LP |
3046 | if (r < 0) { |
3047 | safe_close(cfd); | |
3048 | return r; | |
3049 | } | |
3050 | ||
4ff9bc2e LP |
3051 | /* If we received no fd, we got EIO here. If this happens with a process exit code of EXIT_SUCCESS |
3052 | * this is a spurious accept(), let's convert that back to EAGAIN here. */ | |
3053 | if (cfd == -EIO) | |
3054 | return -EAGAIN; | |
a79279c7 LP |
3055 | if (cfd < 0) |
3056 | return log_unit_error_errno(UNIT(s), cfd, "Failed to receive connection socket: %m"); | |
3057 | ||
3058 | return cfd; | |
3059 | ||
3060 | shortcut: | |
3061 | cfd = socket_accept_do(s, fd); | |
4ff9bc2e LP |
3062 | if (cfd == -EAGAIN) /* spurious accept(), skip it silently */ |
3063 | return -EAGAIN; | |
a79279c7 LP |
3064 | if (cfd < 0) |
3065 | return log_unit_error_errno(UNIT(s), cfd, "Failed to accept connection socket: %m"); | |
3066 | ||
3067 | return cfd; | |
3068 | } | |
3069 | ||
718db961 | 3070 | static int socket_dispatch_io(sd_event_source *source, int fd, uint32_t revents, void *userdata) { |
99534007 | 3071 | SocketPort *p = ASSERT_PTR(userdata); |
254d1313 | 3072 | int cfd = -EBADF; |
9152c765 | 3073 | |
8d567588 | 3074 | assert(fd >= 0); |
9152c765 | 3075 | |
718db961 LP |
3076 | if (p->socket->state != SOCKET_LISTENING) |
3077 | return 0; | |
871d7de4 | 3078 | |
f2341e0a | 3079 | log_unit_debug(UNIT(p->socket), "Incoming traffic"); |
9152c765 | 3080 | |
718db961 | 3081 | if (revents != EPOLLIN) { |
718db961 | 3082 | if (revents & EPOLLHUP) |
f2341e0a | 3083 | 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 | 3084 | else |
f2341e0a | 3085 | log_unit_error(UNIT(p->socket), "Got unexpected poll event (0x%x) on socket.", revents); |
8d567588 | 3086 | goto fail; |
4f2d528d LP |
3087 | } |
3088 | ||
718db961 LP |
3089 | if (p->socket->accept && |
3090 | p->type == SOCKET_SOCKET && | |
3091 | socket_address_can_accept(&p->address)) { | |
3092 | ||
a79279c7 | 3093 | cfd = socket_accept_in_cgroup(p->socket, p, fd); |
4ff9bc2e LP |
3094 | if (cfd == -EAGAIN) /* Spurious accept() */ |
3095 | return 0; | |
a79279c7 LP |
3096 | if (cfd < 0) |
3097 | goto fail; | |
4fd5948e | 3098 | |
5d0fe423 | 3099 | socket_apply_socket_options(p->socket, p, cfd); |
4f2d528d | 3100 | } |
9152c765 | 3101 | |
718db961 LP |
3102 | socket_enter_running(p->socket, cfd); |
3103 | return 0; | |
8d567588 LP |
3104 | |
3105 | fail: | |
718db961 LP |
3106 | socket_enter_stop_pre(p->socket, SOCKET_FAILURE_RESOURCES); |
3107 | return 0; | |
9152c765 LP |
3108 | } |
3109 | ||
87f0e418 LP |
3110 | static void socket_sigchld_event(Unit *u, pid_t pid, int code, int status) { |
3111 | Socket *s = SOCKET(u); | |
cfc4eb4c | 3112 | SocketResult f; |
5cb5a6ff LP |
3113 | |
3114 | assert(s); | |
034c6ed7 | 3115 | assert(pid >= 0); |
5cb5a6ff | 3116 | |
43a19142 | 3117 | if (pid != s->control_pid.pid) |
8c47c732 | 3118 | return; |
542563ba | 3119 | |
43a19142 | 3120 | pidref_done(&s->control_pid); |
034c6ed7 | 3121 | |
1f0958f6 | 3122 | if (is_clean_exit(code, status, EXIT_CLEAN_COMMAND, NULL)) |
cfc4eb4c LP |
3123 | f = SOCKET_SUCCESS; |
3124 | else if (code == CLD_EXITED) | |
3125 | f = SOCKET_FAILURE_EXIT_CODE; | |
3126 | else if (code == CLD_KILLED) | |
3127 | f = SOCKET_FAILURE_SIGNAL; | |
3128 | else if (code == CLD_DUMPED) | |
3129 | f = SOCKET_FAILURE_CORE_DUMP; | |
3130 | else | |
04499a70 | 3131 | assert_not_reached(); |
8c47c732 | 3132 | |
b708e7ce | 3133 | if (s->control_command) { |
6ea832a2 | 3134 | exec_status_exit(&s->control_command->exec_status, &s->exec_context, pid, code, status); |
a16e1123 | 3135 | |
3ed0cd26 | 3136 | if (s->control_command->flags & EXEC_COMMAND_IGNORE_FAILURE) |
cfc4eb4c | 3137 | f = SOCKET_SUCCESS; |
b708e7ce LP |
3138 | } |
3139 | ||
91bbd9b7 | 3140 | unit_log_process_exit( |
5cc2cd1c | 3141 | u, |
91bbd9b7 LP |
3142 | "Control process", |
3143 | socket_exec_command_to_string(s->control_command_id), | |
5cc2cd1c | 3144 | f == SOCKET_SUCCESS, |
91bbd9b7 | 3145 | code, status); |
034c6ed7 | 3146 | |
a0fef983 | 3147 | if (s->result == SOCKET_SUCCESS) |
cfc4eb4c LP |
3148 | s->result = f; |
3149 | ||
3150 | if (s->control_command && | |
3151 | s->control_command->command_next && | |
3152 | f == SOCKET_SUCCESS) { | |
3153 | ||
f2341e0a | 3154 | log_unit_debug(u, "Running next command for state %s", socket_state_to_string(s->state)); |
cfc4eb4c | 3155 | socket_run_next(s); |
acbb0225 | 3156 | } else { |
a16e1123 LP |
3157 | s->control_command = NULL; |
3158 | s->control_command_id = _SOCKET_EXEC_COMMAND_INVALID; | |
3159 | ||
034c6ed7 LP |
3160 | /* No further commands for this step, so let's figure |
3161 | * out what to do next */ | |
5cb5a6ff | 3162 | |
f2341e0a | 3163 | log_unit_debug(u, "Got final SIGCHLD for state %s", socket_state_to_string(s->state)); |
acbb0225 | 3164 | |
034c6ed7 LP |
3165 | switch (s->state) { |
3166 | ||
3167 | case SOCKET_START_PRE: | |
cfc4eb4c | 3168 | if (f == SOCKET_SUCCESS) |
3900e5fd | 3169 | socket_enter_start_chown(s); |
034c6ed7 | 3170 | else |
cfc4eb4c | 3171 | socket_enter_signal(s, SOCKET_FINAL_SIGTERM, f); |
034c6ed7 LP |
3172 | break; |
3173 | ||
3900e5fd LP |
3174 | case SOCKET_START_CHOWN: |
3175 | if (f == SOCKET_SUCCESS) | |
3176 | socket_enter_start_post(s); | |
3177 | else | |
3178 | socket_enter_stop_pre(s, f); | |
3179 | break; | |
3180 | ||
034c6ed7 | 3181 | case SOCKET_START_POST: |
cfc4eb4c | 3182 | if (f == SOCKET_SUCCESS) |
e9af15c3 | 3183 | socket_enter_listening(s); |
034c6ed7 | 3184 | else |
cfc4eb4c | 3185 | socket_enter_stop_pre(s, f); |
034c6ed7 LP |
3186 | break; |
3187 | ||
3188 | case SOCKET_STOP_PRE: | |
3189 | case SOCKET_STOP_PRE_SIGTERM: | |
3190 | case SOCKET_STOP_PRE_SIGKILL: | |
cfc4eb4c | 3191 | socket_enter_stop_post(s, f); |
034c6ed7 LP |
3192 | break; |
3193 | ||
3194 | case SOCKET_STOP_POST: | |
80876c20 LP |
3195 | case SOCKET_FINAL_SIGTERM: |
3196 | case SOCKET_FINAL_SIGKILL: | |
cfc4eb4c | 3197 | socket_enter_dead(s, f); |
034c6ed7 LP |
3198 | break; |
3199 | ||
c968d76a YW |
3200 | case SOCKET_CLEANING: |
3201 | ||
3202 | if (s->clean_result == SOCKET_SUCCESS) | |
3203 | s->clean_result = f; | |
3204 | ||
3205 | socket_enter_dead(s, SOCKET_SUCCESS); | |
3206 | break; | |
3207 | ||
034c6ed7 | 3208 | default: |
04499a70 | 3209 | assert_not_reached(); |
034c6ed7 LP |
3210 | } |
3211 | } | |
c4e2ceae LP |
3212 | |
3213 | /* Notify clients about changed exit status */ | |
3214 | unit_add_to_dbus_queue(u); | |
034c6ed7 | 3215 | } |
5cb5a6ff | 3216 | |
718db961 LP |
3217 | static int socket_dispatch_timer(sd_event_source *source, usec_t usec, void *userdata) { |
3218 | Socket *s = SOCKET(userdata); | |
5cb5a6ff | 3219 | |
034c6ed7 | 3220 | assert(s); |
718db961 | 3221 | assert(s->timer_event_source == source); |
034c6ed7 LP |
3222 | |
3223 | switch (s->state) { | |
3224 | ||
3225 | case SOCKET_START_PRE: | |
f2341e0a | 3226 | log_unit_warning(UNIT(s), "Starting timed out. Terminating."); |
cfc4eb4c | 3227 | socket_enter_signal(s, SOCKET_FINAL_SIGTERM, SOCKET_FAILURE_TIMEOUT); |
da19d5c1 | 3228 | break; |
80876c20 | 3229 | |
3900e5fd | 3230 | case SOCKET_START_CHOWN: |
034c6ed7 | 3231 | case SOCKET_START_POST: |
f2341e0a | 3232 | log_unit_warning(UNIT(s), "Starting timed out. Stopping."); |
cfc4eb4c | 3233 | socket_enter_stop_pre(s, SOCKET_FAILURE_TIMEOUT); |
034c6ed7 LP |
3234 | break; |
3235 | ||
3236 | case SOCKET_STOP_PRE: | |
f2341e0a | 3237 | log_unit_warning(UNIT(s), "Stopping timed out. Terminating."); |
cfc4eb4c | 3238 | socket_enter_signal(s, SOCKET_STOP_PRE_SIGTERM, SOCKET_FAILURE_TIMEOUT); |
034c6ed7 LP |
3239 | break; |
3240 | ||
3241 | case SOCKET_STOP_PRE_SIGTERM: | |
4819ff03 | 3242 | if (s->kill_context.send_sigkill) { |
f2341e0a | 3243 | log_unit_warning(UNIT(s), "Stopping timed out. Killing."); |
cfc4eb4c | 3244 | socket_enter_signal(s, SOCKET_STOP_PRE_SIGKILL, SOCKET_FAILURE_TIMEOUT); |
ba035df2 | 3245 | } else { |
f2341e0a | 3246 | log_unit_warning(UNIT(s), "Stopping timed out. Skipping SIGKILL. Ignoring."); |
cfc4eb4c | 3247 | socket_enter_stop_post(s, SOCKET_FAILURE_TIMEOUT); |
ba035df2 | 3248 | } |
034c6ed7 LP |
3249 | break; |
3250 | ||
3251 | case SOCKET_STOP_PRE_SIGKILL: | |
f2341e0a | 3252 | log_unit_warning(UNIT(s), "Processes still around after SIGKILL. Ignoring."); |
cfc4eb4c | 3253 | socket_enter_stop_post(s, SOCKET_FAILURE_TIMEOUT); |
034c6ed7 LP |
3254 | break; |
3255 | ||
3256 | case SOCKET_STOP_POST: | |
f2341e0a | 3257 | log_unit_warning(UNIT(s), "Stopping timed out (2). Terminating."); |
cfc4eb4c | 3258 | socket_enter_signal(s, SOCKET_FINAL_SIGTERM, SOCKET_FAILURE_TIMEOUT); |
034c6ed7 LP |
3259 | break; |
3260 | ||
80876c20 | 3261 | case SOCKET_FINAL_SIGTERM: |
4819ff03 | 3262 | if (s->kill_context.send_sigkill) { |
f2341e0a | 3263 | log_unit_warning(UNIT(s), "Stopping timed out (2). Killing."); |
cfc4eb4c | 3264 | socket_enter_signal(s, SOCKET_FINAL_SIGKILL, SOCKET_FAILURE_TIMEOUT); |
ba035df2 | 3265 | } else { |
f2341e0a | 3266 | log_unit_warning(UNIT(s), "Stopping timed out (2). Skipping SIGKILL. Ignoring."); |
cfc4eb4c | 3267 | socket_enter_dead(s, SOCKET_FAILURE_TIMEOUT); |
ba035df2 | 3268 | } |
034c6ed7 LP |
3269 | break; |
3270 | ||
80876c20 | 3271 | case SOCKET_FINAL_SIGKILL: |
f2341e0a | 3272 | log_unit_warning(UNIT(s), "Still around after SIGKILL (2). Entering failed mode."); |
cfc4eb4c | 3273 | socket_enter_dead(s, SOCKET_FAILURE_TIMEOUT); |
034c6ed7 LP |
3274 | break; |
3275 | ||
c968d76a YW |
3276 | case SOCKET_CLEANING: |
3277 | log_unit_warning(UNIT(s), "Cleaning timed out. killing."); | |
3278 | ||
3279 | if (s->clean_result == SOCKET_SUCCESS) | |
3280 | s->clean_result = SOCKET_FAILURE_TIMEOUT; | |
3281 | ||
3282 | socket_enter_signal(s, SOCKET_FINAL_SIGKILL, 0); | |
3283 | break; | |
3284 | ||
034c6ed7 | 3285 | default: |
04499a70 | 3286 | assert_not_reached(); |
034c6ed7 | 3287 | } |
718db961 LP |
3288 | |
3289 | return 0; | |
5cb5a6ff LP |
3290 | } |
3291 | ||
79c7626d | 3292 | int socket_collect_fds(Socket *s, int **fds) { |
da6053d0 | 3293 | size_t k = 0, n = 0; |
da6053d0 | 3294 | int *rfds; |
44d8db9e LP |
3295 | |
3296 | assert(s); | |
3297 | assert(fds); | |
44d8db9e LP |
3298 | |
3299 | /* Called from the service code for requesting our fds */ | |
3300 | ||
15087cdb | 3301 | LIST_FOREACH(port, p, s->ports) { |
44d8db9e | 3302 | if (p->fd >= 0) |
79c7626d LP |
3303 | n++; |
3304 | n += p->n_auxiliary_fds; | |
15087cdb | 3305 | } |
44d8db9e | 3306 | |
79c7626d | 3307 | if (n <= 0) { |
de3756ab | 3308 | *fds = NULL; |
de3756ab LP |
3309 | return 0; |
3310 | } | |
3311 | ||
79c7626d | 3312 | rfds = new(int, n); |
e5403f09 | 3313 | if (!rfds) |
44d8db9e LP |
3314 | return -ENOMEM; |
3315 | ||
15087cdb | 3316 | LIST_FOREACH(port, p, s->ports) { |
44d8db9e LP |
3317 | if (p->fd >= 0) |
3318 | rfds[k++] = p->fd; | |
6c1abe88 | 3319 | for (size_t i = 0; i < p->n_auxiliary_fds; ++i) |
15087cdb PS |
3320 | rfds[k++] = p->auxiliary_fds[i]; |
3321 | } | |
44d8db9e | 3322 | |
79c7626d | 3323 | assert(k == n); |
44d8db9e LP |
3324 | |
3325 | *fds = rfds; | |
da6053d0 | 3326 | return (int) n; |
44d8db9e LP |
3327 | } |
3328 | ||
e821075a LP |
3329 | static void socket_reset_failed(Unit *u) { |
3330 | Socket *s = SOCKET(u); | |
3331 | ||
3332 | assert(s); | |
3333 | ||
3334 | if (s->state == SOCKET_FAILED) | |
3335 | socket_set_state(s, SOCKET_DEAD); | |
3336 | ||
3337 | s->result = SOCKET_SUCCESS; | |
c968d76a | 3338 | s->clean_result = SOCKET_SUCCESS; |
e821075a LP |
3339 | } |
3340 | ||
6cf6bbc2 LP |
3341 | void socket_connection_unref(Socket *s) { |
3342 | assert(s); | |
3343 | ||
3344 | /* The service is dead. Yay! | |
3345 | * | |
35b8ca3a | 3346 | * This is strictly for one-instance-per-connection |
6cf6bbc2 LP |
3347 | * services. */ |
3348 | ||
3349 | assert(s->n_connections > 0); | |
3350 | s->n_connections--; | |
3351 | ||
f2341e0a | 3352 | log_unit_debug(UNIT(s), "One connection closed, %u left.", s->n_connections); |
5632e374 LP |
3353 | } |
3354 | ||
d137a488 UTL |
3355 | static void socket_trigger_notify(Unit *u, Unit *other) { |
3356 | Socket *s = SOCKET(u); | |
d137a488 UTL |
3357 | |
3358 | assert(u); | |
3359 | assert(other); | |
3360 | ||
d14e3a0d | 3361 | /* Filter out invocations with bogus state */ |
0377cd29 LP |
3362 | assert(UNIT_IS_LOAD_COMPLETE(other->load_state)); |
3363 | assert(other->type == UNIT_SERVICE); | |
d14e3a0d LP |
3364 | |
3365 | /* Don't propagate state changes from the service if we are already down */ | |
3366 | if (!IN_SET(s->state, SOCKET_RUNNING, SOCKET_LISTENING)) | |
d137a488 UTL |
3367 | return; |
3368 | ||
d14e3a0d LP |
3369 | /* We don't care for the service state if we are in Accept=yes mode */ |
3370 | if (s->accept) | |
3371 | return; | |
3372 | ||
3373 | /* Propagate start limit hit state */ | |
6bf0f408 LP |
3374 | if (other->start_limit_hit) { |
3375 | socket_enter_stop_pre(s, SOCKET_FAILURE_SERVICE_START_LIMIT_HIT); | |
d137a488 | 3376 | return; |
6bf0f408 | 3377 | } |
d137a488 | 3378 | |
d14e3a0d LP |
3379 | /* Don't propagate anything if there's still a job queued */ |
3380 | if (other->job) | |
6bf0f408 | 3381 | return; |
d137a488 | 3382 | |
6bf0f408 | 3383 | if (IN_SET(SERVICE(other)->state, |
a1d31573 | 3384 | SERVICE_DEAD, SERVICE_DEAD_BEFORE_AUTO_RESTART, SERVICE_FAILED, SERVICE_FAILED_BEFORE_AUTO_RESTART, |
6bf0f408 | 3385 | SERVICE_FINAL_SIGTERM, SERVICE_FINAL_SIGKILL, |
c068650f | 3386 | SERVICE_AUTO_RESTART, SERVICE_AUTO_RESTART_QUEUED)) |
6bf0f408 | 3387 | socket_enter_listening(s); |
d137a488 | 3388 | |
6bf0f408 | 3389 | if (SERVICE(other)->state == SERVICE_RUNNING) |
d137a488 UTL |
3390 | socket_set_state(s, SOCKET_RUNNING); |
3391 | } | |
3392 | ||
7a7821c8 | 3393 | static int socket_get_timeout(Unit *u, usec_t *timeout) { |
68db7a3b | 3394 | Socket *s = SOCKET(u); |
7a7821c8 | 3395 | usec_t t; |
68db7a3b ZJS |
3396 | int r; |
3397 | ||
3398 | if (!s->timer_event_source) | |
3399 | return 0; | |
3400 | ||
7a7821c8 | 3401 | r = sd_event_source_get_time(s->timer_event_source, &t); |
68db7a3b ZJS |
3402 | if (r < 0) |
3403 | return r; | |
7a7821c8 LP |
3404 | if (t == USEC_INFINITY) |
3405 | return 0; | |
68db7a3b | 3406 | |
7a7821c8 | 3407 | *timeout = t; |
68db7a3b ZJS |
3408 | return 1; |
3409 | } | |
3410 | ||
8dd4c05b LP |
3411 | char *socket_fdname(Socket *s) { |
3412 | assert(s); | |
3413 | ||
3414 | /* Returns the name to use for $LISTEN_NAMES. If the user | |
3415 | * didn't specify anything specifically, use the socket unit's | |
3416 | * name as fallback. */ | |
3417 | ||
84500122 | 3418 | return s->fdname ?: UNIT(s)->id; |
8dd4c05b LP |
3419 | } |
3420 | ||
37eb258e LP |
3421 | static PidRef *socket_control_pid(Unit *u) { |
3422 | return &ASSERT_PTR(SOCKET(u))->control_pid; | |
291d565a LP |
3423 | } |
3424 | ||
c968d76a YW |
3425 | static int socket_clean(Unit *u, ExecCleanMask mask) { |
3426 | _cleanup_strv_free_ char **l = NULL; | |
3427 | Socket *s = SOCKET(u); | |
3428 | int r; | |
3429 | ||
3430 | assert(s); | |
3431 | assert(mask != 0); | |
3432 | ||
3433 | if (s->state != SOCKET_DEAD) | |
3434 | return -EBUSY; | |
3435 | ||
3436 | r = exec_context_get_clean_directories(&s->exec_context, u->manager->prefix, mask, &l); | |
3437 | if (r < 0) | |
3438 | return r; | |
3439 | ||
3440 | if (strv_isempty(l)) | |
3441 | return -EUNATCH; | |
3442 | ||
3443 | socket_unwatch_control_pid(s); | |
3444 | s->clean_result = SOCKET_SUCCESS; | |
3445 | s->control_command = NULL; | |
3446 | s->control_command_id = _SOCKET_EXEC_COMMAND_INVALID; | |
3447 | ||
3448 | r = socket_arm_timer(s, usec_add(now(CLOCK_MONOTONIC), s->exec_context.timeout_clean_usec)); | |
3449 | if (r < 0) | |
3450 | goto fail; | |
3451 | ||
4775b55d | 3452 | r = unit_fork_and_watch_rm_rf(u, l, &s->control_pid); |
43a19142 LP |
3453 | if (r < 0) |
3454 | goto fail; | |
c968d76a | 3455 | |
43a19142 | 3456 | socket_set_state(s, SOCKET_CLEANING); |
c968d76a YW |
3457 | return 0; |
3458 | ||
3459 | fail: | |
3460 | log_unit_warning_errno(u, r, "Failed to initiate cleaning: %m"); | |
3461 | s->clean_result = SOCKET_FAILURE_RESOURCES; | |
5dcadb4c | 3462 | s->timer_event_source = sd_event_source_disable_unref(s->timer_event_source); |
c968d76a YW |
3463 | return r; |
3464 | } | |
3465 | ||
3466 | static int socket_can_clean(Unit *u, ExecCleanMask *ret) { | |
3467 | Socket *s = SOCKET(u); | |
3468 | ||
3469 | assert(s); | |
3470 | ||
3471 | return exec_context_get_clean_mask(&s->exec_context, ret); | |
3472 | } | |
3473 | ||
705578c3 | 3474 | static int socket_can_start(Unit *u) { |
9727f242 DDM |
3475 | Socket *s = SOCKET(u); |
3476 | int r; | |
3477 | ||
3478 | assert(s); | |
3479 | ||
3480 | r = unit_test_start_limit(u); | |
3481 | if (r < 0) { | |
3482 | socket_enter_dead(s, SOCKET_FAILURE_START_LIMIT_HIT); | |
3483 | return r; | |
3484 | } | |
3485 | ||
705578c3 | 3486 | return 1; |
9727f242 DDM |
3487 | } |
3488 | ||
a16e1123 | 3489 | static const char* const socket_exec_command_table[_SOCKET_EXEC_COMMAND_MAX] = { |
48d83e33 | 3490 | [SOCKET_EXEC_START_PRE] = "ExecStartPre", |
836bb1cd | 3491 | [SOCKET_EXEC_START_CHOWN] = "ExecStartChown", |
48d83e33 ZJS |
3492 | [SOCKET_EXEC_START_POST] = "ExecStartPost", |
3493 | [SOCKET_EXEC_STOP_PRE] = "ExecStopPre", | |
3494 | [SOCKET_EXEC_STOP_POST] = "ExecStopPost" | |
a16e1123 LP |
3495 | }; |
3496 | ||
3497 | DEFINE_STRING_TABLE_LOOKUP(socket_exec_command, SocketExecCommand); | |
3498 | ||
cfc4eb4c | 3499 | static const char* const socket_result_table[_SOCKET_RESULT_MAX] = { |
40f41f34 DDM |
3500 | [SOCKET_SUCCESS] = "success", |
3501 | [SOCKET_FAILURE_RESOURCES] = "resources", | |
3502 | [SOCKET_FAILURE_TIMEOUT] = "timeout", | |
3503 | [SOCKET_FAILURE_EXIT_CODE] = "exit-code", | |
3504 | [SOCKET_FAILURE_SIGNAL] = "signal", | |
3505 | [SOCKET_FAILURE_CORE_DUMP] = "core-dump", | |
3506 | [SOCKET_FAILURE_START_LIMIT_HIT] = "start-limit-hit", | |
3507 | [SOCKET_FAILURE_TRIGGER_LIMIT_HIT] = "trigger-limit-hit", | |
3508 | [SOCKET_FAILURE_SERVICE_START_LIMIT_HIT] = "service-start-limit-hit" | |
cfc4eb4c LP |
3509 | }; |
3510 | ||
3511 | DEFINE_STRING_TABLE_LOOKUP(socket_result, SocketResult); | |
3512 | ||
9b191525 LP |
3513 | static const char* const socket_timestamping_table[_SOCKET_TIMESTAMPING_MAX] = { |
3514 | [SOCKET_TIMESTAMPING_OFF] = "off", | |
48d83e33 ZJS |
3515 | [SOCKET_TIMESTAMPING_US] = "us", |
3516 | [SOCKET_TIMESTAMPING_NS] = "ns", | |
9b191525 LP |
3517 | }; |
3518 | ||
3519 | DEFINE_STRING_TABLE_LOOKUP(socket_timestamping, SocketTimestamping); | |
3520 | ||
3521 | SocketTimestamping socket_timestamping_from_string_harder(const char *p) { | |
3522 | SocketTimestamping t; | |
3523 | int r; | |
3524 | ||
3525 | if (!p) | |
3526 | return _SOCKET_TIMESTAMPING_INVALID; | |
3527 | ||
3528 | t = socket_timestamping_from_string(p); | |
3529 | if (t >= 0) | |
3530 | return t; | |
3531 | ||
3532 | /* Let's alternatively support the various other aliases parse_time() accepts for ns and µs here, | |
3533 | * too. */ | |
3534 | if (streq(p, "nsec")) | |
3535 | return SOCKET_TIMESTAMPING_NS; | |
d0a6d7c4 | 3536 | if (STR_IN_SET(p, "usec", "µs", "μs")) /* Accept both small greek letter mu + micro sign unicode codepoints */ |
9b191525 LP |
3537 | return SOCKET_TIMESTAMPING_US; |
3538 | ||
3539 | r = parse_boolean(p); | |
3540 | if (r < 0) | |
3541 | return _SOCKET_TIMESTAMPING_INVALID; | |
3542 | ||
3543 | return r ? SOCKET_TIMESTAMPING_NS : SOCKET_TIMESTAMPING_OFF; /* If boolean yes, default to ns accuracy */ | |
3544 | } | |
3545 | ||
87f0e418 | 3546 | const UnitVTable socket_vtable = { |
7d17cfbc | 3547 | .object_size = sizeof(Socket), |
718db961 LP |
3548 | .exec_context_offset = offsetof(Socket, exec_context), |
3549 | .cgroup_context_offset = offsetof(Socket, cgroup_context), | |
3550 | .kill_context_offset = offsetof(Socket, kill_context), | |
613b411c | 3551 | .exec_runtime_offset = offsetof(Socket, exec_runtime), |
3ef63c31 | 3552 | |
f975e971 LP |
3553 | .sections = |
3554 | "Unit\0" | |
3555 | "Socket\0" | |
3556 | "Install\0", | |
4ad49000 | 3557 | .private_section = "Socket", |
71645aca | 3558 | |
9c0320e7 | 3559 | .can_transient = true, |
c80a9a33 LP |
3560 | .can_trigger = true, |
3561 | .can_fail = true, | |
9c0320e7 | 3562 | |
034c6ed7 LP |
3563 | .init = socket_init, |
3564 | .done = socket_done, | |
a16e1123 LP |
3565 | .load = socket_load, |
3566 | ||
3567 | .coldplug = socket_coldplug, | |
034c6ed7 | 3568 | |
5cb5a6ff LP |
3569 | .dump = socket_dump, |
3570 | ||
542563ba LP |
3571 | .start = socket_start, |
3572 | .stop = socket_stop, | |
5cb5a6ff | 3573 | |
c968d76a YW |
3574 | .clean = socket_clean, |
3575 | .can_clean = socket_can_clean, | |
718db961 | 3576 | |
68db7a3b ZJS |
3577 | .get_timeout = socket_get_timeout, |
3578 | ||
a16e1123 LP |
3579 | .serialize = socket_serialize, |
3580 | .deserialize_item = socket_deserialize_item, | |
01e10de3 | 3581 | .distribute_fds = socket_distribute_fds, |
a16e1123 | 3582 | |
5cb5a6ff | 3583 | .active_state = socket_active_state, |
10a94420 | 3584 | .sub_state_to_string = socket_sub_state_to_string, |
5cb5a6ff | 3585 | |
52a12341 YW |
3586 | .will_restart = unit_will_restart_default, |
3587 | ||
f2f725e5 | 3588 | .may_gc = socket_may_gc, |
6cf6bbc2 | 3589 | |
034c6ed7 | 3590 | .sigchld_event = socket_sigchld_event, |
4139c1b2 | 3591 | |
d137a488 UTL |
3592 | .trigger_notify = socket_trigger_notify, |
3593 | ||
fdf20a31 | 3594 | .reset_failed = socket_reset_failed, |
5632e374 | 3595 | |
291d565a LP |
3596 | .control_pid = socket_control_pid, |
3597 | ||
74c964d3 LP |
3598 | .bus_set_property = bus_socket_set_property, |
3599 | .bus_commit_properties = bus_socket_commit_properties, | |
c6918296 MS |
3600 | |
3601 | .status_message_formats = { | |
c6918296 MS |
3602 | .finished_start_job = { |
3603 | [JOB_DONE] = "Listening on %s.", | |
3604 | [JOB_FAILED] = "Failed to listen on %s.", | |
c6918296 MS |
3605 | [JOB_TIMEOUT] = "Timed out starting %s.", |
3606 | }, | |
3607 | .finished_stop_job = { | |
3608 | [JOB_DONE] = "Closed %s.", | |
3609 | [JOB_FAILED] = "Failed stopping %s.", | |
3610 | [JOB_TIMEOUT] = "Timed out stopping %s.", | |
3611 | }, | |
3612 | }, | |
9727f242 | 3613 | |
705578c3 | 3614 | .can_start = socket_can_start, |
5cb5a6ff | 3615 | }; |