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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" | |
17 | #include "copy.h" | |
18 | #include "dbus-socket.h" | |
6fcbec6f | 19 | #include "dbus-unit.h" |
e8da24a6 | 20 | #include "def.h" |
86e045ec | 21 | #include "errno-list.h" |
e8da24a6 | 22 | #include "exit-status.h" |
3ffd4af2 | 23 | #include "fd-util.h" |
f97b34a6 | 24 | #include "format-util.h" |
95f7fbbf | 25 | #include "fs-util.h" |
a79279c7 | 26 | #include "in-addr-util.h" |
60d9771c | 27 | #include "io-util.h" |
da96ad5a | 28 | #include "ip-protocol-list.h" |
e8da24a6 | 29 | #include "label.h" |
83c60c9f | 30 | #include "log.h" |
49e942b2 | 31 | #include "mkdir.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" |
24882e06 | 37 | #include "signal-util.h" |
e8da24a6 | 38 | #include "smack-util.h" |
d68c645b | 39 | #include "socket.h" |
5c3fa98d | 40 | #include "socket-netlink.h" |
e8da24a6 | 41 | #include "special.h" |
8b43440b | 42 | #include "string-table.h" |
07630cea | 43 | #include "string-util.h" |
e8da24a6 LP |
44 | #include "strv.h" |
45 | #include "unit-name.h" | |
e8da24a6 | 46 | #include "unit.h" |
b1d4f8e1 | 47 | #include "user-util.h" |
83c60c9f | 48 | |
166cf510 ZJS |
49 | struct SocketPeer { |
50 | unsigned n_ref; | |
51 | ||
52 | Socket *socket; | |
53 | union sockaddr_union peer; | |
41733ae1 | 54 | socklen_t peer_salen; |
166cf510 ZJS |
55 | }; |
56 | ||
acbb0225 | 57 | static const UnitActiveState state_translation_table[_SOCKET_STATE_MAX] = { |
87f0e418 LP |
58 | [SOCKET_DEAD] = UNIT_INACTIVE, |
59 | [SOCKET_START_PRE] = UNIT_ACTIVATING, | |
3900e5fd | 60 | [SOCKET_START_CHOWN] = UNIT_ACTIVATING, |
87f0e418 LP |
61 | [SOCKET_START_POST] = UNIT_ACTIVATING, |
62 | [SOCKET_LISTENING] = UNIT_ACTIVE, | |
63 | [SOCKET_RUNNING] = UNIT_ACTIVE, | |
64 | [SOCKET_STOP_PRE] = UNIT_DEACTIVATING, | |
65 | [SOCKET_STOP_PRE_SIGTERM] = UNIT_DEACTIVATING, | |
66 | [SOCKET_STOP_PRE_SIGKILL] = UNIT_DEACTIVATING, | |
67 | [SOCKET_STOP_POST] = UNIT_DEACTIVATING, | |
80876c20 LP |
68 | [SOCKET_FINAL_SIGTERM] = UNIT_DEACTIVATING, |
69 | [SOCKET_FINAL_SIGKILL] = UNIT_DEACTIVATING, | |
c968d76a YW |
70 | [SOCKET_FAILED] = UNIT_FAILED, |
71 | [SOCKET_CLEANING] = UNIT_MAINTENANCE, | |
83c60c9f | 72 | }; |
5cb5a6ff | 73 | |
718db961 LP |
74 | static int socket_dispatch_io(sd_event_source *source, int fd, uint32_t revents, void *userdata); |
75 | static int socket_dispatch_timer(sd_event_source *source, usec_t usec, void *userdata); | |
3e5f04bf | 76 | static void flush_ports(Socket *s); |
718db961 | 77 | |
a16e1123 LP |
78 | static void socket_init(Unit *u) { |
79 | Socket *s = SOCKET(u); | |
80 | ||
81 | assert(u); | |
ac155bb8 | 82 | assert(u->load_state == UNIT_STUB); |
a16e1123 | 83 | |
a16e1123 | 84 | s->backlog = SOMAXCONN; |
1f19a534 | 85 | s->timeout_usec = u->manager->default_timeout_start_usec; |
a16e1123 | 86 | s->directory_mode = 0755; |
9131f660 | 87 | s->socket_mode = 0666; |
a16e1123 | 88 | |
6cf6bbc2 LP |
89 | s->max_connections = 64; |
90 | ||
4fd5948e | 91 | s->priority = -1; |
4fd5948e LP |
92 | s->ip_tos = -1; |
93 | s->ip_ttl = -1; | |
4fd5948e | 94 | s->mark = -1; |
4fd5948e | 95 | |
ac155bb8 MS |
96 | s->exec_context.std_output = u->manager->default_std_output; |
97 | s->exec_context.std_error = u->manager->default_std_error; | |
085afe36 | 98 | |
a16e1123 | 99 | s->control_command_id = _SOCKET_EXEC_COMMAND_INVALID; |
8b26cdbd | 100 | |
1f15ce28 | 101 | s->trigger_limit.interval = USEC_INFINITY; |
f5fbe71d | 102 | s->trigger_limit.burst = UINT_MAX; |
a16e1123 | 103 | } |
acbb0225 | 104 | |
5e94833f LP |
105 | static void socket_unwatch_control_pid(Socket *s) { |
106 | assert(s); | |
107 | ||
108 | if (s->control_pid <= 0) | |
109 | return; | |
110 | ||
111 | unit_unwatch_pid(UNIT(s), s->control_pid); | |
112 | s->control_pid = 0; | |
113 | } | |
114 | ||
15087cdb | 115 | static void socket_cleanup_fd_list(SocketPort *p) { |
3ffd4af2 | 116 | assert(p); |
15087cdb | 117 | |
3ffd4af2 | 118 | close_many(p->auxiliary_fds, p->n_auxiliary_fds); |
15087cdb PS |
119 | p->auxiliary_fds = mfree(p->auxiliary_fds); |
120 | p->n_auxiliary_fds = 0; | |
121 | } | |
122 | ||
74051b9b | 123 | void socket_free_ports(Socket *s) { |
034c6ed7 LP |
124 | SocketPort *p; |
125 | ||
126 | assert(s); | |
127 | ||
128 | while ((p = s->ports)) { | |
71fda00f | 129 | LIST_REMOVE(port, s->ports, p); |
034c6ed7 | 130 | |
718db961 LP |
131 | sd_event_source_unref(p->event_source); |
132 | ||
15087cdb | 133 | socket_cleanup_fd_list(p); |
03e334a1 | 134 | safe_close(p->fd); |
034c6ed7 LP |
135 | free(p->path); |
136 | free(p); | |
137 | } | |
74051b9b LP |
138 | } |
139 | ||
140 | static void socket_done(Unit *u) { | |
141 | Socket *s = SOCKET(u); | |
9d565427 | 142 | SocketPeer *p; |
74051b9b LP |
143 | |
144 | assert(s); | |
145 | ||
146 | socket_free_ports(s); | |
034c6ed7 | 147 | |
9a73653c | 148 | while ((p = set_steal_first(s->peers_by_address))) |
9d565427 SS |
149 | p->socket = NULL; |
150 | ||
9a73653c | 151 | s->peers_by_address = set_free(s->peers_by_address); |
9d565427 | 152 | |
e8a565cb | 153 | s->exec_runtime = exec_runtime_unref(s->exec_runtime, false); |
e537352b | 154 | exec_command_free_array(s->exec_command, _SOCKET_EXEC_COMMAND_MAX); |
034c6ed7 LP |
155 | s->control_command = NULL; |
156 | ||
29206d46 LP |
157 | dynamic_creds_unref(&s->dynamic_creds); |
158 | ||
5e94833f | 159 | socket_unwatch_control_pid(s); |
034c6ed7 | 160 | |
57020a3a | 161 | unit_ref_unset(&s->service); |
034c6ed7 | 162 | |
a1e58e8e LP |
163 | s->tcp_congestion = mfree(s->tcp_congestion); |
164 | s->bind_to_device = mfree(s->bind_to_device); | |
acbb0225 | 165 | |
0a78712e DM |
166 | s->smack = mfree(s->smack); |
167 | s->smack_ip_in = mfree(s->smack_ip_in); | |
168 | s->smack_ip_out = mfree(s->smack_ip_out); | |
0eb59ccf | 169 | |
811ba7a0 LP |
170 | strv_free(s->symlinks); |
171 | ||
0a78712e DM |
172 | s->user = mfree(s->user); |
173 | s->group = mfree(s->group); | |
3900e5fd | 174 | |
a97b23d6 DM |
175 | s->fdname = mfree(s->fdname); |
176 | ||
5dcadb4c | 177 | s->timer_event_source = sd_event_source_disable_unref(s->timer_event_source); |
718db961 LP |
178 | } |
179 | ||
36c16a7c | 180 | static int socket_arm_timer(Socket *s, usec_t usec) { |
718db961 LP |
181 | int r; |
182 | ||
183 | assert(s); | |
184 | ||
718db961 | 185 | if (s->timer_event_source) { |
36c16a7c | 186 | r = sd_event_source_set_time(s->timer_event_source, usec); |
718db961 LP |
187 | if (r < 0) |
188 | return r; | |
189 | ||
190 | return sd_event_source_set_enabled(s->timer_event_source, SD_EVENT_ONESHOT); | |
191 | } | |
192 | ||
36c16a7c LP |
193 | if (usec == USEC_INFINITY) |
194 | return 0; | |
195 | ||
7dfbe2e3 | 196 | r = sd_event_add_time( |
6a0f1f6d LP |
197 | UNIT(s)->manager->event, |
198 | &s->timer_event_source, | |
199 | CLOCK_MONOTONIC, | |
36c16a7c | 200 | usec, 0, |
6a0f1f6d | 201 | socket_dispatch_timer, s); |
7dfbe2e3 TG |
202 | if (r < 0) |
203 | return r; | |
204 | ||
205 | (void) sd_event_source_set_description(s->timer_event_source, "socket-timer"); | |
206 | ||
207 | return 0; | |
5cb5a6ff LP |
208 | } |
209 | ||
4f2d528d LP |
210 | static bool have_non_accept_socket(Socket *s) { |
211 | SocketPort *p; | |
212 | ||
213 | assert(s); | |
214 | ||
215 | if (!s->accept) | |
216 | return true; | |
217 | ||
dd5ad9d4 LP |
218 | LIST_FOREACH(port, p, s->ports) { |
219 | ||
220 | if (p->type != SOCKET_SOCKET) | |
221 | return true; | |
222 | ||
4f2d528d LP |
223 | if (!socket_address_can_accept(&p->address)) |
224 | return true; | |
dd5ad9d4 | 225 | } |
4f2d528d LP |
226 | |
227 | return false; | |
228 | } | |
229 | ||
eef85c4a | 230 | static int socket_add_mount_dependencies(Socket *s) { |
6e2ef85b | 231 | SocketPort *p; |
6e2ef85b LP |
232 | int r; |
233 | ||
234 | assert(s); | |
6e2ef85b | 235 | |
a57f7e2c LP |
236 | LIST_FOREACH(port, p, s->ports) { |
237 | const char *path = NULL; | |
6e2ef85b | 238 | |
a57f7e2c LP |
239 | if (p->type == SOCKET_SOCKET) |
240 | path = socket_address_get_path(&p->address); | |
60252446 | 241 | else if (IN_SET(p->type, SOCKET_FIFO, SOCKET_SPECIAL, SOCKET_USB_FUNCTION)) |
a57f7e2c | 242 | path = p->path; |
6e2ef85b | 243 | |
a57f7e2c LP |
244 | if (!path) |
245 | continue; | |
6e2ef85b | 246 | |
eef85c4a | 247 | r = unit_require_mounts_for(UNIT(s), path, UNIT_DEPENDENCY_FILE); |
b87705cd | 248 | if (r < 0) |
6e2ef85b | 249 | return r; |
b87705cd | 250 | } |
6e2ef85b LP |
251 | |
252 | return 0; | |
253 | } | |
254 | ||
eef85c4a | 255 | static int socket_add_device_dependencies(Socket *s) { |
6e2ef85b | 256 | char *t; |
6e2ef85b LP |
257 | |
258 | assert(s); | |
259 | ||
7d0c710d | 260 | if (!s->bind_to_device || streq(s->bind_to_device, "lo")) |
6e2ef85b LP |
261 | return 0; |
262 | ||
63c372cb | 263 | t = strjoina("/sys/subsystem/net/devices/", s->bind_to_device); |
d336ba9f | 264 | return unit_add_node_dependency(UNIT(s), t, UNIT_BINDS_TO, UNIT_DEPENDENCY_FILE); |
6e2ef85b LP |
265 | } |
266 | ||
a40eb732 LP |
267 | static int socket_add_default_dependencies(Socket *s) { |
268 | int r; | |
269 | assert(s); | |
270 | ||
4c9ea260 LP |
271 | if (!UNIT(s)->default_dependencies) |
272 | return 0; | |
273 | ||
35d8c19a | 274 | r = unit_add_dependency_by_name(UNIT(s), UNIT_BEFORE, SPECIAL_SOCKETS_TARGET, true, UNIT_DEPENDENCY_DEFAULT); |
e3d84721 LP |
275 | if (r < 0) |
276 | return r; | |
2a77d31d | 277 | |
463d0d15 | 278 | if (MANAGER_IS_SYSTEM(UNIT(s)->manager)) { |
5a724170 | 279 | r = unit_add_two_dependencies_by_name(UNIT(s), UNIT_AFTER, UNIT_REQUIRES, SPECIAL_SYSINIT_TARGET, true, UNIT_DEPENDENCY_DEFAULT); |
e3d84721 | 280 | if (r < 0) |
a40eb732 | 281 | return r; |
2a77d31d | 282 | } |
a40eb732 | 283 | |
5a724170 | 284 | return unit_add_two_dependencies_by_name(UNIT(s), UNIT_BEFORE, UNIT_CONFLICTS, SPECIAL_SHUTDOWN_TARGET, true, UNIT_DEPENDENCY_DEFAULT); |
a40eb732 LP |
285 | } |
286 | ||
44a6b1b6 | 287 | _pure_ static bool socket_has_exec(Socket *s) { |
4cfc6dbe LP |
288 | unsigned i; |
289 | assert(s); | |
290 | ||
291 | for (i = 0; i < _SOCKET_EXEC_COMMAND_MAX; i++) | |
292 | if (s->exec_command[i]) | |
293 | return true; | |
294 | ||
295 | return false; | |
296 | } | |
297 | ||
e821075a LP |
298 | static int socket_add_extras(Socket *s) { |
299 | Unit *u = UNIT(s); | |
e537352b | 300 | int r; |
44d8db9e | 301 | |
e821075a | 302 | assert(s); |
57020a3a | 303 | |
1f15ce28 LP |
304 | /* Pick defaults for the trigger limit, if nothing was explicitly configured. We pick a relatively high limit |
305 | * in Accept=yes mode, and a lower limit for Accept=no. Reason: in Accept=yes mode we are invoking accept() | |
306 | * ourselves before the trigger limit can hit, thus incoming connections are taken off the socket queue quickly | |
307 | * and reliably. This is different for Accept=no, where the spawned service has to take the incoming traffic | |
308 | * off the queues, which it might not necessarily do. Moreover, while Accept=no services are supposed to | |
309 | * process whatever is queued in one go, and thus should normally never have to be started frequently. This is | |
310 | * different for Accept=yes where each connection is processed by a new service instance, and thus frequent | |
311 | * service starts are typical. */ | |
312 | ||
313 | if (s->trigger_limit.interval == USEC_INFINITY) | |
314 | s->trigger_limit.interval = 2 * USEC_PER_SEC; | |
315 | ||
f5fbe71d | 316 | if (s->trigger_limit.burst == UINT_MAX) { |
1f15ce28 LP |
317 | if (s->accept) |
318 | s->trigger_limit.burst = 200; | |
319 | else | |
320 | s->trigger_limit.burst = 20; | |
321 | } | |
322 | ||
e821075a | 323 | if (have_non_accept_socket(s)) { |
23a177ef | 324 | |
e821075a LP |
325 | if (!UNIT_DEREF(s->service)) { |
326 | Unit *x; | |
57020a3a | 327 | |
e821075a | 328 | r = unit_load_related_unit(u, ".service", &x); |
57020a3a | 329 | if (r < 0) |
4f2d528d | 330 | return r; |
e821075a | 331 | |
7f7d01ed | 332 | unit_ref_set(&s->service, u, x); |
4f2d528d | 333 | } |
44d8db9e | 334 | |
eef85c4a | 335 | r = unit_add_two_dependencies(u, UNIT_BEFORE, UNIT_TRIGGERS, UNIT_DEREF(s->service), true, UNIT_DEPENDENCY_IMPLICIT); |
e821075a | 336 | if (r < 0) |
6e2ef85b | 337 | return r; |
e821075a | 338 | } |
6e2ef85b | 339 | |
eef85c4a | 340 | r = socket_add_mount_dependencies(s); |
e821075a LP |
341 | if (r < 0) |
342 | return r; | |
6e2ef85b | 343 | |
eef85c4a | 344 | r = socket_add_device_dependencies(s); |
e821075a LP |
345 | if (r < 0) |
346 | return r; | |
347 | ||
598459ce | 348 | r = unit_patch_contexts(u); |
e821075a LP |
349 | if (r < 0) |
350 | return r; | |
351 | ||
352 | if (socket_has_exec(s)) { | |
353 | r = unit_add_exec_dependencies(u, &s->exec_context); | |
354 | if (r < 0) | |
355 | return r; | |
e821075a | 356 | } |
a016b922 | 357 | |
88af31f9 LP |
358 | r = unit_set_default_slice(u); |
359 | if (r < 0) | |
360 | return r; | |
361 | ||
4c9ea260 LP |
362 | r = socket_add_default_dependencies(s); |
363 | if (r < 0) | |
364 | return r; | |
e821075a LP |
365 | |
366 | return 0; | |
367 | } | |
368 | ||
811ba7a0 LP |
369 | static const char *socket_find_symlink_target(Socket *s) { |
370 | const char *found = NULL; | |
371 | SocketPort *p; | |
372 | ||
373 | LIST_FOREACH(port, p, s->ports) { | |
374 | const char *f = NULL; | |
375 | ||
376 | switch (p->type) { | |
377 | ||
378 | case SOCKET_FIFO: | |
379 | f = p->path; | |
380 | break; | |
381 | ||
382 | case SOCKET_SOCKET: | |
b9495e8d | 383 | f = socket_address_get_path(&p->address); |
811ba7a0 LP |
384 | break; |
385 | ||
386 | default: | |
387 | break; | |
388 | } | |
389 | ||
390 | if (f) { | |
391 | if (found) | |
392 | return NULL; | |
393 | ||
394 | found = f; | |
395 | } | |
396 | } | |
397 | ||
398 | return found; | |
399 | } | |
400 | ||
e821075a LP |
401 | static int socket_verify(Socket *s) { |
402 | assert(s); | |
75193d41 | 403 | assert(UNIT(s)->load_state == UNIT_LOADED); |
e821075a | 404 | |
d85ff944 YW |
405 | if (!s->ports) |
406 | return log_unit_error_errno(UNIT(s), SYNTHETIC_ERRNO(ENOEXEC), "Unit has no Listen setting (ListenStream=, ListenDatagram=, ListenFIFO=, ...). Refusing."); | |
e821075a | 407 | |
d85ff944 YW |
408 | if (s->accept && have_non_accept_socket(s)) |
409 | return log_unit_error_errno(UNIT(s), SYNTHETIC_ERRNO(ENOEXEC), "Unit configured for accepting sockets, but sockets are non-accepting. Refusing."); | |
e821075a | 410 | |
d85ff944 YW |
411 | if (s->accept && s->max_connections <= 0) |
412 | return log_unit_error_errno(UNIT(s), SYNTHETIC_ERRNO(ENOEXEC), "MaxConnection= setting too small. Refusing."); | |
e06c73cc | 413 | |
d85ff944 YW |
414 | if (s->accept && UNIT_DEREF(s->service)) |
415 | return log_unit_error_errno(UNIT(s), SYNTHETIC_ERRNO(ENOEXEC), "Explicit service configuration for accepting socket units not supported. Refusing."); | |
e821075a | 416 | |
d85ff944 YW |
417 | if (s->exec_context.pam_name && s->kill_context.kill_mode != KILL_CONTROL_GROUP) |
418 | return log_unit_error_errno(UNIT(s), SYNTHETIC_ERRNO(ENOEXEC), "Unit has PAM enabled. Kill mode must be set to 'control-group'. Refusing."); | |
e821075a | 419 | |
d85ff944 YW |
420 | if (!strv_isempty(s->symlinks) && !socket_find_symlink_target(s)) |
421 | return log_unit_error_errno(UNIT(s), SYNTHETIC_ERRNO(ENOEXEC), "Unit has symlinks set but none or more than one node in the file system. Refusing."); | |
811ba7a0 | 422 | |
e821075a LP |
423 | return 0; |
424 | } | |
425 | ||
7a08d314 | 426 | static void peer_address_hash_func(const SocketPeer *s, struct siphash *state) { |
9d565427 SS |
427 | assert(s); |
428 | ||
429 | if (s->peer.sa.sa_family == AF_INET) | |
430 | siphash24_compress(&s->peer.in.sin_addr, sizeof(s->peer.in.sin_addr), state); | |
41733ae1 | 431 | else if (s->peer.sa.sa_family == AF_INET6) |
9d565427 | 432 | siphash24_compress(&s->peer.in6.sin6_addr, sizeof(s->peer.in6.sin6_addr), state); |
359a5bcf SH |
433 | else if (s->peer.sa.sa_family == AF_VSOCK) |
434 | siphash24_compress(&s->peer.vm.svm_cid, sizeof(s->peer.vm.svm_cid), state); | |
41733ae1 LP |
435 | else |
436 | assert_not_reached("Unknown address family."); | |
9d565427 SS |
437 | } |
438 | ||
7a08d314 | 439 | static int peer_address_compare_func(const SocketPeer *x, const SocketPeer *y) { |
a0edd02e | 440 | int r; |
9d565427 | 441 | |
a0edd02e FB |
442 | r = CMP(x->peer.sa.sa_family, y->peer.sa.sa_family); |
443 | if (r != 0) | |
444 | return r; | |
9d565427 SS |
445 | |
446 | switch(x->peer.sa.sa_family) { | |
447 | case AF_INET: | |
448 | return memcmp(&x->peer.in.sin_addr, &y->peer.in.sin_addr, sizeof(x->peer.in.sin_addr)); | |
449 | case AF_INET6: | |
450 | return memcmp(&x->peer.in6.sin6_addr, &y->peer.in6.sin6_addr, sizeof(x->peer.in6.sin6_addr)); | |
359a5bcf | 451 | case AF_VSOCK: |
6dd91b36 | 452 | return CMP(x->peer.vm.svm_cid, y->peer.vm.svm_cid); |
9d565427 | 453 | } |
166cf510 | 454 | assert_not_reached("Black sheep in the family!"); |
9d565427 SS |
455 | } |
456 | ||
7a08d314 | 457 | DEFINE_PRIVATE_HASH_OPS(peer_address_hash_ops, SocketPeer, peer_address_hash_func, peer_address_compare_func); |
9d565427 | 458 | |
e821075a LP |
459 | static int socket_load(Unit *u) { |
460 | Socket *s = SOCKET(u); | |
461 | int r; | |
462 | ||
463 | assert(u); | |
464 | assert(u->load_state == UNIT_STUB); | |
465 | ||
9a73653c | 466 | r = set_ensure_allocated(&s->peers_by_address, &peer_address_hash_ops); |
9d565427 SS |
467 | if (r < 0) |
468 | return r; | |
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 | ||
488 | p = new0(SocketPeer, 1); | |
489 | if (!p) | |
490 | return NULL; | |
491 | ||
492 | p->n_ref = 1; | |
493 | ||
494 | return p; | |
495 | } | |
496 | ||
8301aa0b YW |
497 | static SocketPeer *socket_peer_free(SocketPeer *p) { |
498 | assert(p); | |
166cf510 ZJS |
499 | |
500 | if (p->socket) | |
501 | set_remove(p->socket->peers_by_address, p); | |
502 | ||
503 | return mfree(p); | |
504 | } | |
505 | ||
8301aa0b YW |
506 | DEFINE_TRIVIAL_REF_UNREF_FUNC(SocketPeer, socket_peer, socket_peer_free); |
507 | ||
3ebcd323 | 508 | int socket_acquire_peer(Socket *s, int fd, SocketPeer **p) { |
166cf510 ZJS |
509 | _cleanup_(socket_peer_unrefp) SocketPeer *remote = NULL; |
510 | SocketPeer sa = {}, *i; | |
511 | socklen_t salen = sizeof(sa.peer); | |
512 | int r; | |
513 | ||
514 | assert(fd >= 0); | |
515 | assert(s); | |
516 | ||
fe79f107 | 517 | if (getpeername(fd, &sa.peer.sa, &salen) < 0) |
fc2d74ab | 518 | return log_unit_error_errno(UNIT(s), errno, "getpeername failed: %m"); |
166cf510 | 519 | |
359a5bcf | 520 | if (!IN_SET(sa.peer.sa.sa_family, AF_INET, AF_INET6, AF_VSOCK)) { |
166cf510 ZJS |
521 | *p = NULL; |
522 | return 0; | |
523 | } | |
524 | ||
525 | i = set_get(s->peers_by_address, &sa); | |
526 | if (i) { | |
527 | *p = socket_peer_ref(i); | |
528 | return 1; | |
529 | } | |
530 | ||
531 | remote = socket_peer_new(); | |
532 | if (!remote) | |
533 | return log_oom(); | |
534 | ||
535 | remote->peer = sa.peer; | |
41733ae1 | 536 | remote->peer_salen = salen; |
166cf510 ZJS |
537 | |
538 | r = set_put(s->peers_by_address, remote); | |
539 | if (r < 0) | |
540 | return r; | |
541 | ||
542 | remote->socket = s; | |
543 | ||
1cc6c93a | 544 | *p = TAKE_PTR(remote); |
166cf510 ZJS |
545 | |
546 | return 1; | |
547 | } | |
548 | ||
44a6b1b6 | 549 | _const_ static const char* listen_lookup(int family, int type) { |
7a22745a LP |
550 | |
551 | if (family == AF_NETLINK) | |
552 | return "ListenNetlink"; | |
542563ba LP |
553 | |
554 | if (type == SOCK_STREAM) | |
555 | return "ListenStream"; | |
556 | else if (type == SOCK_DGRAM) | |
557 | return "ListenDatagram"; | |
558 | else if (type == SOCK_SEQPACKET) | |
559 | return "ListenSequentialPacket"; | |
560 | ||
034c6ed7 | 561 | assert_not_reached("Unknown socket type"); |
542563ba LP |
562 | return NULL; |
563 | } | |
564 | ||
87f0e418 | 565 | static void socket_dump(Unit *u, FILE *f, const char *prefix) { |
5cb5a6ff | 566 | SocketExecCommand c; |
87f0e418 | 567 | Socket *s = SOCKET(u); |
542563ba | 568 | SocketPort *p; |
827d9bf2 | 569 | const char *prefix2, *str; |
5cb5a6ff LP |
570 | |
571 | assert(s); | |
fa068367 | 572 | assert(f); |
5cb5a6ff | 573 | |
4c940960 | 574 | prefix = strempty(prefix); |
63c372cb | 575 | prefix2 = strjoina(prefix, "\t"); |
c43d20a0 | 576 | |
5cb5a6ff LP |
577 | fprintf(f, |
578 | "%sSocket State: %s\n" | |
81a5c6d0 | 579 | "%sResult: %s\n" |
c968d76a | 580 | "%sClean Result: %s\n" |
542563ba | 581 | "%sBindIPv6Only: %s\n" |
b5a0699f LP |
582 | "%sBacklog: %u\n" |
583 | "%sSocketMode: %04o\n" | |
4fd5948e LP |
584 | "%sDirectoryMode: %04o\n" |
585 | "%sKeepAlive: %s\n" | |
4427c3f4 | 586 | "%sNoDelay: %s\n" |
cebf8b20 | 587 | "%sFreeBind: %s\n" |
6b6d2dee | 588 | "%sTransparent: %s\n" |
ec6370a2 | 589 | "%sBroadcast: %s\n" |
ede3deb4 | 590 | "%sPassCredentials: %s\n" |
54ecda32 | 591 | "%sPassSecurity: %s\n" |
a3d19f5d | 592 | "%sPassPacketInfo: %s\n" |
bd1fe7c7 | 593 | "%sTCPCongestion: %s\n" |
16115b0a | 594 | "%sRemoveOnStop: %s\n" |
55301ec0 | 595 | "%sWritable: %s\n" |
827d9bf2 | 596 | "%sFileDescriptorName: %s\n" |
16115b0a | 597 | "%sSELinuxContextFromNet: %s\n", |
a16e1123 | 598 | prefix, socket_state_to_string(s->state), |
81a5c6d0 | 599 | prefix, socket_result_to_string(s->result), |
c968d76a | 600 | prefix, socket_result_to_string(s->clean_result), |
c0120d99 | 601 | prefix, socket_address_bind_ipv6_only_to_string(s->bind_ipv6_only), |
b5a0699f LP |
602 | prefix, s->backlog, |
603 | prefix, s->socket_mode, | |
4fd5948e LP |
604 | prefix, s->directory_mode, |
605 | prefix, yes_no(s->keep_alive), | |
4427c3f4 | 606 | prefix, yes_no(s->no_delay), |
cebf8b20 | 607 | prefix, yes_no(s->free_bind), |
6b6d2dee | 608 | prefix, yes_no(s->transparent), |
ec6370a2 | 609 | prefix, yes_no(s->broadcast), |
d68af586 | 610 | prefix, yes_no(s->pass_cred), |
54ecda32 | 611 | prefix, yes_no(s->pass_sec), |
a3d19f5d | 612 | prefix, yes_no(s->pass_pktinfo), |
bd1fe7c7 | 613 | prefix, strna(s->tcp_congestion), |
16115b0a | 614 | prefix, yes_no(s->remove_on_stop), |
55301ec0 | 615 | prefix, yes_no(s->writable), |
8dd4c05b | 616 | prefix, socket_fdname(s), |
16115b0a | 617 | prefix, yes_no(s->selinux_context_from_net)); |
542563ba | 618 | |
9b191525 LP |
619 | if (s->timestamping != SOCKET_TIMESTAMPING_OFF) |
620 | fprintf(f, | |
621 | "%sTimestamping: %s\n", | |
622 | prefix, socket_timestamping_to_string(s->timestamping)); | |
623 | ||
70123e68 LP |
624 | if (s->control_pid > 0) |
625 | fprintf(f, | |
de0671ee ZJS |
626 | "%sControl PID: "PID_FMT"\n", |
627 | prefix, s->control_pid); | |
70123e68 | 628 | |
acbb0225 LP |
629 | if (s->bind_to_device) |
630 | fprintf(f, | |
631 | "%sBindToDevice: %s\n", | |
632 | prefix, s->bind_to_device); | |
633 | ||
4f2d528d LP |
634 | if (s->accept) |
635 | fprintf(f, | |
6cf6bbc2 LP |
636 | "%sAccepted: %u\n" |
637 | "%sNConnections: %u\n" | |
827d9bf2 YW |
638 | "%sMaxConnections: %u\n" |
639 | "%sMaxConnectionsPerSource: %u\n", | |
6cf6bbc2 LP |
640 | prefix, s->n_accepted, |
641 | prefix, s->n_connections, | |
827d9bf2 YW |
642 | prefix, s->max_connections, |
643 | prefix, s->max_connections_per_source); | |
3e5f04bf RM |
644 | else |
645 | fprintf(f, | |
646 | "%sFlushPending: %s\n", | |
647 | prefix, yes_no(s->flush_pending)); | |
648 | ||
4f2d528d | 649 | |
4fd5948e LP |
650 | if (s->priority >= 0) |
651 | fprintf(f, | |
652 | "%sPriority: %i\n", | |
653 | prefix, s->priority); | |
654 | ||
655 | if (s->receive_buffer > 0) | |
656 | fprintf(f, | |
657 | "%sReceiveBuffer: %zu\n", | |
658 | prefix, s->receive_buffer); | |
659 | ||
660 | if (s->send_buffer > 0) | |
661 | fprintf(f, | |
662 | "%sSendBuffer: %zu\n", | |
663 | prefix, s->send_buffer); | |
664 | ||
665 | if (s->ip_tos >= 0) | |
666 | fprintf(f, | |
667 | "%sIPTOS: %i\n", | |
668 | prefix, s->ip_tos); | |
669 | ||
670 | if (s->ip_ttl >= 0) | |
671 | fprintf(f, | |
672 | "%sIPTTL: %i\n", | |
673 | prefix, s->ip_ttl); | |
674 | ||
675 | if (s->pipe_size > 0) | |
676 | fprintf(f, | |
677 | "%sPipeSize: %zu\n", | |
678 | prefix, s->pipe_size); | |
679 | ||
680 | if (s->mark >= 0) | |
681 | fprintf(f, | |
682 | "%sMark: %i\n", | |
683 | prefix, s->mark); | |
684 | ||
916abb21 LP |
685 | if (s->mq_maxmsg > 0) |
686 | fprintf(f, | |
687 | "%sMessageQueueMaxMessages: %li\n", | |
688 | prefix, s->mq_maxmsg); | |
689 | ||
690 | if (s->mq_msgsize > 0) | |
691 | fprintf(f, | |
692 | "%sMessageQueueMessageSize: %li\n", | |
693 | prefix, s->mq_msgsize); | |
694 | ||
718db961 | 695 | if (s->reuse_port) |
f7db7a69 SL |
696 | fprintf(f, |
697 | "%sReusePort: %s\n", | |
718db961 | 698 | prefix, yes_no(s->reuse_port)); |
f7db7a69 | 699 | |
0eb59ccf AK |
700 | if (s->smack) |
701 | fprintf(f, | |
702 | "%sSmackLabel: %s\n", | |
703 | prefix, s->smack); | |
704 | ||
705 | if (s->smack_ip_in) | |
706 | fprintf(f, | |
707 | "%sSmackLabelIPIn: %s\n", | |
708 | prefix, s->smack_ip_in); | |
709 | ||
710 | if (s->smack_ip_out) | |
711 | fprintf(f, | |
712 | "%sSmackLabelIPOut: %s\n", | |
713 | prefix, s->smack_ip_out); | |
714 | ||
3900e5fd LP |
715 | if (!isempty(s->user) || !isempty(s->group)) |
716 | fprintf(f, | |
d2a50e3b LP |
717 | "%sSocketUser: %s\n" |
718 | "%sSocketGroup: %s\n", | |
3900e5fd LP |
719 | prefix, strna(s->user), |
720 | prefix, strna(s->group)); | |
721 | ||
3cd761e4 | 722 | if (s->keep_alive_time > 0) |
209e9dcd | 723 | fprintf(f, |
3cd761e4 | 724 | "%sKeepAliveTimeSec: %s\n", |
5291f26d | 725 | prefix, FORMAT_TIMESPAN(s->keep_alive_time, USEC_PER_SEC)); |
209e9dcd | 726 | |
7be9df7d | 727 | if (s->keep_alive_interval > 0) |
209e9dcd | 728 | fprintf(f, |
3cd761e4 | 729 | "%sKeepAliveIntervalSec: %s\n", |
5291f26d | 730 | prefix, FORMAT_TIMESPAN(s->keep_alive_interval, USEC_PER_SEC)); |
209e9dcd | 731 | |
7be9df7d | 732 | if (s->keep_alive_cnt > 0) |
209e9dcd SS |
733 | fprintf(f, |
734 | "%sKeepAliveProbes: %u\n", | |
735 | prefix, s->keep_alive_cnt); | |
736 | ||
7be9df7d | 737 | if (s->defer_accept > 0) |
cc567c9b | 738 | fprintf(f, |
3cd761e4 | 739 | "%sDeferAcceptSec: %s\n", |
5291f26d | 740 | prefix, FORMAT_TIMESPAN(s->defer_accept, USEC_PER_SEC)); |
cc567c9b | 741 | |
034c6ed7 | 742 | LIST_FOREACH(port, p, s->ports) { |
5cb5a6ff | 743 | |
7be9df7d YW |
744 | switch (p->type) { |
745 | case SOCKET_SOCKET: { | |
746 | _cleanup_free_ char *k = NULL; | |
542563ba LP |
747 | const char *t; |
748 | int r; | |
542563ba | 749 | |
e53fc357 LP |
750 | r = socket_address_print(&p->address, &k); |
751 | if (r < 0) | |
4bbccb02 | 752 | t = strerror_safe(r); |
542563ba LP |
753 | else |
754 | t = k; | |
755 | ||
7a22745a | 756 | fprintf(f, "%s%s: %s\n", prefix, listen_lookup(socket_address_family(&p->address), p->address.type), t); |
7be9df7d YW |
757 | break; |
758 | } | |
759 | case SOCKET_SPECIAL: | |
b0a3f2bc | 760 | fprintf(f, "%sListenSpecial: %s\n", prefix, p->path); |
7be9df7d YW |
761 | break; |
762 | case SOCKET_USB_FUNCTION: | |
60252446 | 763 | fprintf(f, "%sListenUSBFunction: %s\n", prefix, p->path); |
7be9df7d YW |
764 | break; |
765 | case SOCKET_MQUEUE: | |
916abb21 | 766 | fprintf(f, "%sListenMessageQueue: %s\n", prefix, p->path); |
7be9df7d YW |
767 | break; |
768 | default: | |
542563ba | 769 | fprintf(f, "%sListenFIFO: %s\n", prefix, p->path); |
7be9df7d | 770 | } |
542563ba | 771 | } |
5cb5a6ff | 772 | |
1745fa70 EV |
773 | fprintf(f, |
774 | "%sTriggerLimitIntervalSec: %s\n" | |
775 | "%sTriggerLimitBurst: %u\n", | |
5291f26d | 776 | prefix, FORMAT_TIMESPAN(s->trigger_limit.interval, USEC_PER_SEC), |
1745fa70 EV |
777 | prefix, s->trigger_limit.burst); |
778 | ||
da96ad5a | 779 | str = ip_protocol_to_name(s->socket_protocol); |
827d9bf2 YW |
780 | if (str) |
781 | fprintf(f, "%sSocketProtocol: %s\n", prefix, str); | |
782 | ||
783 | if (!strv_isempty(s->symlinks)) { | |
784 | char **q; | |
785 | ||
786 | fprintf(f, "%sSymlinks:", prefix); | |
787 | STRV_FOREACH(q, s->symlinks) | |
788 | fprintf(f, " %s", *q); | |
789 | ||
790 | fprintf(f, "\n"); | |
791 | } | |
792 | ||
793 | fprintf(f, | |
794 | "%sTimeoutSec: %s\n", | |
5291f26d | 795 | prefix, FORMAT_TIMESPAN(s->timeout_usec, USEC_PER_SEC)); |
827d9bf2 | 796 | |
5cb5a6ff | 797 | exec_context_dump(&s->exec_context, f, prefix); |
4819ff03 | 798 | kill_context_dump(&s->kill_context, f, prefix); |
5cb5a6ff | 799 | |
e537352b | 800 | for (c = 0; c < _SOCKET_EXEC_COMMAND_MAX; c++) { |
c43d20a0 LP |
801 | if (!s->exec_command[c]) |
802 | continue; | |
5cb5a6ff | 803 | |
40d50879 | 804 | fprintf(f, "%s-> %s:\n", |
a16e1123 | 805 | prefix, socket_exec_command_to_string(c)); |
c43d20a0 LP |
806 | |
807 | exec_command_dump_list(s->exec_command[c], f, prefix2); | |
5cb5a6ff | 808 | } |
18f573aa | 809 | |
bc0623df | 810 | cgroup_context_dump(UNIT(s), f, prefix); |
5cb5a6ff LP |
811 | } |
812 | ||
4f2d528d LP |
813 | static int instance_from_socket(int fd, unsigned nr, char **instance) { |
814 | socklen_t l; | |
815 | char *r; | |
9d16d0c7 | 816 | union sockaddr_union local, remote; |
4f2d528d LP |
817 | |
818 | assert(fd >= 0); | |
819 | assert(instance); | |
820 | ||
821 | l = sizeof(local); | |
822 | if (getsockname(fd, &local.sa, &l) < 0) | |
823 | return -errno; | |
824 | ||
825 | l = sizeof(remote); | |
826 | if (getpeername(fd, &remote.sa, &l) < 0) | |
827 | return -errno; | |
828 | ||
829 | switch (local.sa.sa_family) { | |
830 | ||
831 | case AF_INET: { | |
832 | uint32_t | |
8e38570e LP |
833 | a = be32toh(local.in.sin_addr.s_addr), |
834 | b = be32toh(remote.in.sin_addr.s_addr); | |
4f2d528d LP |
835 | |
836 | if (asprintf(&r, | |
77b088c2 LP |
837 | "%u-%u.%u.%u.%u:%u-%u.%u.%u.%u:%u", |
838 | nr, | |
4f2d528d | 839 | a >> 24, (a >> 16) & 0xFF, (a >> 8) & 0xFF, a & 0xFF, |
8e38570e | 840 | be16toh(local.in.sin_port), |
4f2d528d | 841 | b >> 24, (b >> 16) & 0xFF, (b >> 8) & 0xFF, b & 0xFF, |
8e38570e | 842 | be16toh(remote.in.sin_port)) < 0) |
4f2d528d LP |
843 | return -ENOMEM; |
844 | ||
845 | break; | |
846 | } | |
847 | ||
848 | case AF_INET6: { | |
c65a0b14 | 849 | static const unsigned char ipv4_prefix[] = { |
2b061f5a LP |
850 | 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0xFF, 0xFF |
851 | }; | |
852 | ||
853 | if (memcmp(&local.in6.sin6_addr, ipv4_prefix, sizeof(ipv4_prefix)) == 0 && | |
854 | memcmp(&remote.in6.sin6_addr, ipv4_prefix, sizeof(ipv4_prefix)) == 0) { | |
855 | const uint8_t | |
856 | *a = local.in6.sin6_addr.s6_addr+12, | |
857 | *b = remote.in6.sin6_addr.s6_addr+12; | |
858 | ||
859 | if (asprintf(&r, | |
77b088c2 LP |
860 | "%u-%u.%u.%u.%u:%u-%u.%u.%u.%u:%u", |
861 | nr, | |
2b061f5a | 862 | a[0], a[1], a[2], a[3], |
8e38570e | 863 | be16toh(local.in6.sin6_port), |
2b061f5a | 864 | b[0], b[1], b[2], b[3], |
8e38570e | 865 | be16toh(remote.in6.sin6_port)) < 0) |
2b061f5a LP |
866 | return -ENOMEM; |
867 | } else { | |
868 | char a[INET6_ADDRSTRLEN], b[INET6_ADDRSTRLEN]; | |
869 | ||
870 | if (asprintf(&r, | |
77b088c2 LP |
871 | "%u-%s:%u-%s:%u", |
872 | nr, | |
2b061f5a | 873 | inet_ntop(AF_INET6, &local.in6.sin6_addr, a, sizeof(a)), |
8e38570e | 874 | be16toh(local.in6.sin6_port), |
2b061f5a | 875 | inet_ntop(AF_INET6, &remote.in6.sin6_addr, b, sizeof(b)), |
8e38570e | 876 | be16toh(remote.in6.sin6_port)) < 0) |
2b061f5a LP |
877 | return -ENOMEM; |
878 | } | |
4f2d528d LP |
879 | |
880 | break; | |
881 | } | |
882 | ||
883 | case AF_UNIX: { | |
884 | struct ucred ucred; | |
eff05270 | 885 | int k; |
4f2d528d | 886 | |
eff05270 | 887 | k = getpeercred(fd, &ucred); |
d38f6e34 ZJS |
888 | if (k >= 0) { |
889 | if (asprintf(&r, | |
890 | "%u-"PID_FMT"-"UID_FMT, | |
891 | nr, ucred.pid, ucred.uid) < 0) | |
892 | return -ENOMEM; | |
893 | } else if (k == -ENODATA) { | |
894 | /* This handles the case where somebody is | |
895 | * connecting from another pid/uid namespace | |
896 | * (e.g. from outside of our container). */ | |
897 | if (asprintf(&r, | |
898 | "%u-unknown", | |
899 | nr) < 0) | |
900 | return -ENOMEM; | |
901 | } else | |
eff05270 | 902 | return k; |
2f20a8eb | 903 | |
2f20a8eb | 904 | break; |
4f2d528d LP |
905 | } |
906 | ||
359a5bcf SH |
907 | case AF_VSOCK: |
908 | if (asprintf(&r, | |
909 | "%u-%u:%u-%u:%u", | |
910 | nr, | |
911 | local.vm.svm_cid, local.vm.svm_port, | |
912 | remote.vm.svm_cid, remote.vm.svm_port) < 0) | |
913 | return -ENOMEM; | |
914 | ||
915 | break; | |
916 | ||
4f2d528d LP |
917 | default: |
918 | assert_not_reached("Unhandled socket type."); | |
919 | } | |
920 | ||
921 | *instance = r; | |
922 | return 0; | |
923 | } | |
924 | ||
034c6ed7 | 925 | static void socket_close_fds(Socket *s) { |
83c60c9f | 926 | SocketPort *p; |
811ba7a0 | 927 | char **i; |
83c60c9f LP |
928 | |
929 | assert(s); | |
930 | ||
034c6ed7 | 931 | LIST_FOREACH(port, p, s->ports) { |
18e854f8 | 932 | bool was_open; |
718db961 | 933 | |
18e854f8 | 934 | was_open = p->fd >= 0; |
83c60c9f | 935 | |
5dcadb4c | 936 | p->event_source = sd_event_source_disable_unref(p->event_source); |
03e334a1 | 937 | p->fd = safe_close(p->fd); |
15087cdb | 938 | socket_cleanup_fd_list(p); |
a16e1123 | 939 | |
18e854f8 LP |
940 | /* One little note: we should normally not delete any sockets in the file system here! After all some |
941 | * other process we spawned might still have a reference of this fd and wants to continue to use | |
942 | * it. Therefore we normally delete sockets in the file system before we create a new one, not after we | |
943 | * stopped using one! That all said, if the user explicitly requested this, we'll delete them here | |
944 | * anyway, but only then. */ | |
bd1fe7c7 | 945 | |
18e854f8 LP |
946 | if (!was_open || !s->remove_on_stop) |
947 | continue; | |
948 | ||
949 | switch (p->type) { | |
bd1fe7c7 | 950 | |
18e854f8 LP |
951 | case SOCKET_FIFO: |
952 | (void) unlink(p->path); | |
953 | break; | |
bd1fe7c7 | 954 | |
18e854f8 LP |
955 | case SOCKET_MQUEUE: |
956 | (void) mq_unlink(p->path); | |
957 | break; | |
bd1fe7c7 | 958 | |
18e854f8 LP |
959 | case SOCKET_SOCKET: |
960 | (void) socket_address_unlink(&p->address); | |
961 | break; | |
bd1fe7c7 | 962 | |
18e854f8 LP |
963 | default: |
964 | break; | |
bd1fe7c7 | 965 | } |
83c60c9f | 966 | } |
811ba7a0 LP |
967 | |
968 | if (s->remove_on_stop) | |
969 | STRV_FOREACH(i, s->symlinks) | |
18e854f8 | 970 | (void) unlink(*i); |
75db809a ZJS |
971 | |
972 | /* Note that we don't return NULL here, since s has not been freed. */ | |
83c60c9f LP |
973 | } |
974 | ||
5d0fe423 | 975 | static void socket_apply_socket_options(Socket *s, SocketPort *p, int fd) { |
d53e386d LP |
976 | int r; |
977 | ||
4fd5948e | 978 | assert(s); |
5d0fe423 | 979 | assert(p); |
4fd5948e LP |
980 | assert(fd >= 0); |
981 | ||
982 | if (s->keep_alive) { | |
2ff48e98 LP |
983 | r = setsockopt_int(fd, SOL_SOCKET, SO_KEEPALIVE, true); |
984 | if (r < 0) | |
985 | log_unit_warning_errno(UNIT(s), r, "SO_KEEPALIVE failed: %m"); | |
4fd5948e LP |
986 | } |
987 | ||
7be9df7d | 988 | if (s->keep_alive_time > 0) { |
9e5b6496 YW |
989 | r = setsockopt_int(fd, SOL_TCP, TCP_KEEPIDLE, s->keep_alive_time / USEC_PER_SEC); |
990 | if (r < 0) | |
991 | log_unit_warning_errno(UNIT(s), r, "TCP_KEEPIDLE failed: %m"); | |
209e9dcd SS |
992 | } |
993 | ||
7be9df7d | 994 | if (s->keep_alive_interval > 0) { |
9e5b6496 YW |
995 | r = setsockopt_int(fd, SOL_TCP, TCP_KEEPINTVL, s->keep_alive_interval / USEC_PER_SEC); |
996 | if (r < 0) | |
997 | log_unit_warning_errno(UNIT(s), r, "TCP_KEEPINTVL failed: %m"); | |
209e9dcd SS |
998 | } |
999 | ||
7be9df7d | 1000 | if (s->keep_alive_cnt > 0) { |
9e5b6496 YW |
1001 | r = setsockopt_int(fd, SOL_TCP, TCP_KEEPCNT, s->keep_alive_cnt); |
1002 | if (r < 0) | |
1003 | log_unit_warning_errno(UNIT(s), r, "TCP_KEEPCNT failed: %m"); | |
209e9dcd SS |
1004 | } |
1005 | ||
7be9df7d | 1006 | if (s->defer_accept > 0) { |
9e5b6496 YW |
1007 | r = setsockopt_int(fd, SOL_TCP, TCP_DEFER_ACCEPT, s->defer_accept / USEC_PER_SEC); |
1008 | if (r < 0) | |
1009 | log_unit_warning_errno(UNIT(s), r, "TCP_DEFER_ACCEPT failed: %m"); | |
cc567c9b SS |
1010 | } |
1011 | ||
4427c3f4 | 1012 | if (s->no_delay) { |
62bc4efc | 1013 | if (s->socket_protocol == IPPROTO_SCTP) { |
2ff48e98 LP |
1014 | r = setsockopt_int(fd, SOL_SCTP, SCTP_NODELAY, true); |
1015 | if (r < 0) | |
1016 | log_unit_warning_errno(UNIT(s), r, "SCTP_NODELAY failed: %m"); | |
62bc4efc | 1017 | } else { |
2ff48e98 LP |
1018 | r = setsockopt_int(fd, SOL_TCP, TCP_NODELAY, true); |
1019 | if (r < 0) | |
1020 | log_unit_warning_errno(UNIT(s), r, "TCP_NODELAY failed: %m"); | |
62bc4efc | 1021 | } |
4427c3f4 SS |
1022 | } |
1023 | ||
ec6370a2 | 1024 | if (s->broadcast) { |
2ff48e98 LP |
1025 | r = setsockopt_int(fd, SOL_SOCKET, SO_BROADCAST, true); |
1026 | if (r < 0) | |
1027 | log_unit_warning_errno(UNIT(s), r, "SO_BROADCAST failed: %m"); | |
ec6370a2 LP |
1028 | } |
1029 | ||
d68af586 | 1030 | if (s->pass_cred) { |
2ff48e98 LP |
1031 | r = setsockopt_int(fd, SOL_SOCKET, SO_PASSCRED, true); |
1032 | if (r < 0) | |
1033 | log_unit_warning_errno(UNIT(s), r, "SO_PASSCRED failed: %m"); | |
d68af586 MS |
1034 | } |
1035 | ||
54ecda32 | 1036 | if (s->pass_sec) { |
2ff48e98 LP |
1037 | r = setsockopt_int(fd, SOL_SOCKET, SO_PASSSEC, true); |
1038 | if (r < 0) | |
1039 | log_unit_warning_errno(UNIT(s), r, "SO_PASSSEC failed: %m"); | |
54ecda32 LP |
1040 | } |
1041 | ||
a3d19f5d | 1042 | if (s->pass_pktinfo) { |
5d0fe423 | 1043 | r = socket_set_recvpktinfo(fd, socket_address_family(&p->address), true); |
a3d19f5d LP |
1044 | if (r < 0) |
1045 | log_unit_warning_errno(UNIT(s), r, "Failed to enable packet info socket option: %m"); | |
1046 | } | |
1047 | ||
9b191525 LP |
1048 | if (s->timestamping != SOCKET_TIMESTAMPING_OFF) { |
1049 | r = setsockopt_int(fd, SOL_SOCKET, | |
1050 | s->timestamping == SOCKET_TIMESTAMPING_NS ? SO_TIMESTAMPNS : SO_TIMESTAMP, | |
1051 | true); | |
1052 | if (r < 0) | |
1053 | log_unit_warning_errno(UNIT(s), r, "Failed to enable timestamping socket option, ignoring: %m"); | |
1054 | } | |
1055 | ||
9e5b6496 YW |
1056 | if (s->priority >= 0) { |
1057 | r = setsockopt_int(fd, SOL_SOCKET, SO_PRIORITY, s->priority); | |
1058 | if (r < 0) | |
1059 | log_unit_warning_errno(UNIT(s), r, "SO_PRIORITY failed: %m"); | |
1060 | } | |
4fd5948e LP |
1061 | |
1062 | if (s->receive_buffer > 0) { | |
ded71ab3 YW |
1063 | r = fd_set_rcvbuf(fd, s->receive_buffer, false); |
1064 | if (r < 0) | |
35b4e3c1 LP |
1065 | log_unit_full_errno(UNIT(s), ERRNO_IS_PRIVILEGE(r) ? LOG_DEBUG : LOG_WARNING, r, |
1066 | "SO_RCVBUF/SO_RCVBUFFORCE failed: %m"); | |
4fd5948e LP |
1067 | } |
1068 | ||
1069 | if (s->send_buffer > 0) { | |
4934ba21 | 1070 | r = fd_set_sndbuf(fd, s->send_buffer, false); |
ded71ab3 | 1071 | if (r < 0) |
35b4e3c1 LP |
1072 | log_unit_full_errno(UNIT(s), ERRNO_IS_PRIVILEGE(r) ? LOG_DEBUG : LOG_WARNING, r, |
1073 | "SO_SNDBUF/SO_SNDBUFFORCE failed: %m"); | |
4fd5948e LP |
1074 | } |
1075 | ||
9e5b6496 YW |
1076 | if (s->mark >= 0) { |
1077 | r = setsockopt_int(fd, SOL_SOCKET, SO_MARK, s->mark); | |
1078 | if (r < 0) | |
1079 | log_unit_warning_errno(UNIT(s), r, "SO_MARK failed: %m"); | |
1080 | } | |
4fd5948e | 1081 | |
9e5b6496 YW |
1082 | if (s->ip_tos >= 0) { |
1083 | r = setsockopt_int(fd, IPPROTO_IP, IP_TOS, s->ip_tos); | |
1084 | if (r < 0) | |
1085 | log_unit_warning_errno(UNIT(s), r, "IP_TOS failed: %m"); | |
1086 | } | |
4fd5948e | 1087 | |
46925ac5 | 1088 | if (s->ip_ttl >= 0) { |
5d0fe423 LP |
1089 | r = socket_set_ttl(fd, socket_address_family(&p->address), s->ip_ttl); |
1090 | if (r < 0) | |
9e5b6496 | 1091 | log_unit_warning_errno(UNIT(s), r, "IP_TTL/IPV6_UNICAST_HOPS failed: %m"); |
46925ac5 | 1092 | } |
cebf8b20 TT |
1093 | |
1094 | if (s->tcp_congestion) | |
1095 | if (setsockopt(fd, SOL_TCP, TCP_CONGESTION, s->tcp_congestion, strlen(s->tcp_congestion)+1) < 0) | |
f2341e0a | 1096 | log_unit_warning_errno(UNIT(s), errno, "TCP_CONGESTION failed: %m"); |
0eb59ccf | 1097 | |
d53e386d | 1098 | if (s->smack_ip_in) { |
5ab58c20 | 1099 | r = mac_smack_apply_fd(fd, SMACK_ATTR_IPIN, s->smack_ip_in); |
d53e386d | 1100 | if (r < 0) |
f2341e0a | 1101 | log_unit_error_errno(UNIT(s), r, "mac_smack_apply_ip_in_fd: %m"); |
d53e386d | 1102 | } |
9a4e038c | 1103 | |
d53e386d | 1104 | if (s->smack_ip_out) { |
5ab58c20 | 1105 | r = mac_smack_apply_fd(fd, SMACK_ATTR_IPOUT, s->smack_ip_out); |
d53e386d | 1106 | if (r < 0) |
f2341e0a | 1107 | log_unit_error_errno(UNIT(s), r, "mac_smack_apply_ip_out_fd: %m"); |
d53e386d | 1108 | } |
4fd5948e LP |
1109 | } |
1110 | ||
b15bdda8 | 1111 | static void socket_apply_fifo_options(Socket *s, int fd) { |
d53e386d LP |
1112 | int r; |
1113 | ||
4fd5948e LP |
1114 | assert(s); |
1115 | assert(fd >= 0); | |
1116 | ||
1117 | if (s->pipe_size > 0) | |
1118 | if (fcntl(fd, F_SETPIPE_SZ, s->pipe_size) < 0) | |
ed460b07 | 1119 | log_unit_warning_errno(UNIT(s), errno, "Setting pipe size failed, ignoring: %m"); |
0eb59ccf | 1120 | |
d53e386d | 1121 | if (s->smack) { |
5ab58c20 | 1122 | r = mac_smack_apply_fd(fd, SMACK_ATTR_ACCESS, s->smack); |
d53e386d | 1123 | if (r < 0) |
ed460b07 | 1124 | log_unit_error_errno(UNIT(s), r, "SMACK relabelling failed, ignoring: %m"); |
d53e386d | 1125 | } |
4fd5948e LP |
1126 | } |
1127 | ||
b15bdda8 LP |
1128 | static int fifo_address_create( |
1129 | const char *path, | |
1130 | mode_t directory_mode, | |
e8da24a6 | 1131 | mode_t socket_mode) { |
b15bdda8 | 1132 | |
e8da24a6 | 1133 | _cleanup_close_ int fd = -1; |
b15bdda8 | 1134 | mode_t old_mask; |
e8da24a6 LP |
1135 | struct stat st; |
1136 | int r; | |
b15bdda8 LP |
1137 | |
1138 | assert(path); | |
b15bdda8 | 1139 | |
1af87ab7 | 1140 | (void) mkdir_parents_label(path, directory_mode); |
b15bdda8 | 1141 | |
ecabcf8b | 1142 | r = mac_selinux_create_file_prepare(path, S_IFIFO); |
e9a5ef7c | 1143 | if (r < 0) |
e8da24a6 | 1144 | return r; |
b15bdda8 LP |
1145 | |
1146 | /* Enforce the right access mode for the fifo */ | |
7be9df7d | 1147 | old_mask = umask(~socket_mode); |
b15bdda8 LP |
1148 | |
1149 | /* Include the original umask in our mask */ | |
e8da24a6 | 1150 | (void) umask(~socket_mode | old_mask); |
b15bdda8 LP |
1151 | |
1152 | r = mkfifo(path, socket_mode); | |
e8da24a6 | 1153 | (void) umask(old_mask); |
b15bdda8 | 1154 | |
94bc2731 | 1155 | if (r < 0 && errno != EEXIST) { |
b15bdda8 LP |
1156 | r = -errno; |
1157 | goto fail; | |
1158 | } | |
1159 | ||
e8da24a6 | 1160 | fd = open(path, O_RDWR | O_CLOEXEC | O_NOCTTY | O_NONBLOCK | O_NOFOLLOW); |
3cc2aff1 | 1161 | if (fd < 0) { |
b15bdda8 LP |
1162 | r = -errno; |
1163 | goto fail; | |
1164 | } | |
1165 | ||
ecabcf8b | 1166 | mac_selinux_create_file_clear(); |
7a58bfa4 | 1167 | |
b15bdda8 LP |
1168 | if (fstat(fd, &st) < 0) { |
1169 | r = -errno; | |
1170 | goto fail; | |
1171 | } | |
1172 | ||
1173 | if (!S_ISFIFO(st.st_mode) || | |
de0200fc | 1174 | (st.st_mode & 0777) != (socket_mode & ~old_mask) || |
e4f44e73 DR |
1175 | st.st_uid != getuid() || |
1176 | st.st_gid != getgid()) { | |
b15bdda8 LP |
1177 | r = -EEXIST; |
1178 | goto fail; | |
1179 | } | |
1180 | ||
c10d6bdb | 1181 | return TAKE_FD(fd); |
b15bdda8 LP |
1182 | |
1183 | fail: | |
ecabcf8b | 1184 | mac_selinux_create_file_clear(); |
b15bdda8 LP |
1185 | return r; |
1186 | } | |
1187 | ||
55301ec0 | 1188 | static int special_address_create(const char *path, bool writable) { |
e8da24a6 | 1189 | _cleanup_close_ int fd = -1; |
b0a3f2bc LP |
1190 | struct stat st; |
1191 | ||
1192 | assert(path); | |
b0a3f2bc | 1193 | |
55301ec0 | 1194 | fd = open(path, (writable ? O_RDWR : O_RDONLY)|O_CLOEXEC|O_NOCTTY|O_NONBLOCK|O_NOFOLLOW); |
e8da24a6 LP |
1195 | if (fd < 0) |
1196 | return -errno; | |
b0a3f2bc | 1197 | |
e8da24a6 LP |
1198 | if (fstat(fd, &st) < 0) |
1199 | return -errno; | |
b0a3f2bc LP |
1200 | |
1201 | /* Check whether this is a /proc, /sys or /dev file or char device */ | |
e8da24a6 LP |
1202 | if (!S_ISREG(st.st_mode) && !S_ISCHR(st.st_mode)) |
1203 | return -EEXIST; | |
b0a3f2bc | 1204 | |
c10d6bdb | 1205 | return TAKE_FD(fd); |
b0a3f2bc LP |
1206 | } |
1207 | ||
36078102 | 1208 | static int usbffs_address_create(const char *path) { |
60252446 PS |
1209 | _cleanup_close_ int fd = -1; |
1210 | struct stat st; | |
1211 | ||
1212 | assert(path); | |
60252446 PS |
1213 | |
1214 | fd = open(path, O_RDWR|O_CLOEXEC|O_NOCTTY|O_NONBLOCK|O_NOFOLLOW); | |
1215 | if (fd < 0) | |
1216 | return -errno; | |
1217 | ||
1218 | if (fstat(fd, &st) < 0) | |
1219 | return -errno; | |
1220 | ||
13e785f7 | 1221 | /* Check whether this is a regular file (ffs endpoint) */ |
60252446 PS |
1222 | if (!S_ISREG(st.st_mode)) |
1223 | return -EEXIST; | |
1224 | ||
c10d6bdb | 1225 | return TAKE_FD(fd); |
60252446 PS |
1226 | } |
1227 | ||
916abb21 LP |
1228 | static int mq_address_create( |
1229 | const char *path, | |
1230 | mode_t mq_mode, | |
1231 | long maxmsg, | |
e8da24a6 | 1232 | long msgsize) { |
916abb21 | 1233 | |
e8da24a6 | 1234 | _cleanup_close_ int fd = -1; |
916abb21 LP |
1235 | struct stat st; |
1236 | mode_t old_mask; | |
1237 | struct mq_attr _attr, *attr = NULL; | |
1238 | ||
1239 | assert(path); | |
916abb21 LP |
1240 | |
1241 | if (maxmsg > 0 && msgsize > 0) { | |
e8da24a6 LP |
1242 | _attr = (struct mq_attr) { |
1243 | .mq_flags = O_NONBLOCK, | |
1244 | .mq_maxmsg = maxmsg, | |
1245 | .mq_msgsize = msgsize, | |
1246 | }; | |
916abb21 LP |
1247 | attr = &_attr; |
1248 | } | |
1249 | ||
1250 | /* Enforce the right access mode for the mq */ | |
7be9df7d | 1251 | old_mask = umask(~mq_mode); |
916abb21 LP |
1252 | |
1253 | /* Include the original umask in our mask */ | |
e8da24a6 | 1254 | (void) umask(~mq_mode | old_mask); |
916abb21 | 1255 | fd = mq_open(path, O_RDONLY|O_CLOEXEC|O_NONBLOCK|O_CREAT, mq_mode, attr); |
e8da24a6 | 1256 | (void) umask(old_mask); |
916abb21 | 1257 | |
e8da24a6 LP |
1258 | if (fd < 0) |
1259 | return -errno; | |
916abb21 | 1260 | |
e8da24a6 LP |
1261 | if (fstat(fd, &st) < 0) |
1262 | return -errno; | |
916abb21 LP |
1263 | |
1264 | if ((st.st_mode & 0777) != (mq_mode & ~old_mask) || | |
1265 | st.st_uid != getuid() || | |
e8da24a6 LP |
1266 | st.st_gid != getgid()) |
1267 | return -EEXIST; | |
916abb21 | 1268 | |
c10d6bdb | 1269 | return TAKE_FD(fd); |
916abb21 LP |
1270 | } |
1271 | ||
811ba7a0 LP |
1272 | static int socket_symlink(Socket *s) { |
1273 | const char *p; | |
1274 | char **i; | |
95f7fbbf | 1275 | int r; |
811ba7a0 LP |
1276 | |
1277 | assert(s); | |
1278 | ||
1279 | p = socket_find_symlink_target(s); | |
1280 | if (!p) | |
1281 | return 0; | |
1282 | ||
95f7fbbf | 1283 | STRV_FOREACH(i, s->symlinks) { |
1af87ab7 LP |
1284 | (void) mkdir_parents_label(*i, s->directory_mode); |
1285 | ||
6c9c51e5 | 1286 | r = symlink_idempotent(p, *i, false); |
22b20752 LP |
1287 | |
1288 | if (r == -EEXIST && s->remove_on_stop) { | |
1289 | /* If there's already something where we want to create the symlink, and the destructive | |
1290 | * RemoveOnStop= mode is set, then we might as well try to remove what already exists and try | |
1291 | * again. */ | |
1292 | ||
1293 | if (unlink(*i) >= 0) | |
6c9c51e5 | 1294 | r = symlink_idempotent(p, *i, false); |
22b20752 LP |
1295 | } |
1296 | ||
95f7fbbf LP |
1297 | if (r < 0) |
1298 | log_unit_warning_errno(UNIT(s), r, "Failed to create symlink %s → %s, ignoring: %m", p, *i); | |
1299 | } | |
811ba7a0 LP |
1300 | |
1301 | return 0; | |
1302 | } | |
1303 | ||
36078102 | 1304 | static int usbffs_write_descs(int fd, Service *s) { |
6b7e5923 PS |
1305 | int r; |
1306 | ||
1307 | if (!s->usb_function_descriptors || !s->usb_function_strings) | |
1308 | return -EINVAL; | |
1309 | ||
1c876927 | 1310 | r = copy_file_fd(s->usb_function_descriptors, fd, 0); |
6b7e5923 | 1311 | if (r < 0) |
e8da24a6 | 1312 | return r; |
6b7e5923 | 1313 | |
1c876927 | 1314 | return copy_file_fd(s->usb_function_strings, fd, 0); |
6b7e5923 PS |
1315 | } |
1316 | ||
36078102 | 1317 | static int usbffs_select_ep(const struct dirent *d) { |
60252446 PS |
1318 | return d->d_name[0] != '.' && !streq(d->d_name, "ep0"); |
1319 | } | |
1320 | ||
36078102 | 1321 | static int usbffs_dispatch_eps(SocketPort *p) { |
60252446 | 1322 | _cleanup_free_ struct dirent **ent = NULL; |
fe96c0f8 | 1323 | size_t n, k; |
da6053d0 | 1324 | int r; |
60252446 | 1325 | |
00bb64ec | 1326 | r = scandir(p->path, &ent, usbffs_select_ep, alphasort); |
60252446 PS |
1327 | if (r < 0) |
1328 | return -errno; | |
1329 | ||
da6053d0 | 1330 | n = (size_t) r; |
60252446 | 1331 | p->auxiliary_fds = new(int, n); |
0de48764 YW |
1332 | if (!p->auxiliary_fds) { |
1333 | r = -ENOMEM; | |
1334 | goto clear; | |
1335 | } | |
60252446 PS |
1336 | |
1337 | p->n_auxiliary_fds = n; | |
1338 | ||
1339 | k = 0; | |
fe96c0f8 | 1340 | for (size_t i = 0; i < n; ++i) { |
60252446 PS |
1341 | _cleanup_free_ char *ep = NULL; |
1342 | ||
00bb64ec | 1343 | ep = path_make_absolute(ent[i]->d_name, p->path); |
0de48764 YW |
1344 | if (!ep) { |
1345 | r = -ENOMEM; | |
1346 | goto fail; | |
1347 | } | |
60252446 | 1348 | |
4ff361cc | 1349 | path_simplify(ep); |
60252446 | 1350 | |
36078102 | 1351 | r = usbffs_address_create(ep); |
60252446 PS |
1352 | if (r < 0) |
1353 | goto fail; | |
1354 | ||
da6053d0 | 1355 | p->auxiliary_fds[k++] = r; |
60252446 PS |
1356 | } |
1357 | ||
0de48764 YW |
1358 | r = 0; |
1359 | goto clear; | |
60252446 PS |
1360 | |
1361 | fail: | |
e8da24a6 | 1362 | close_many(p->auxiliary_fds, k); |
60252446 PS |
1363 | p->auxiliary_fds = mfree(p->auxiliary_fds); |
1364 | p->n_auxiliary_fds = 0; | |
1365 | ||
0de48764 | 1366 | clear: |
fe96c0f8 | 1367 | for (size_t i = 0; i < n; ++i) |
0de48764 YW |
1368 | free(ent[i]); |
1369 | ||
60252446 PS |
1370 | return r; |
1371 | } | |
1372 | ||
934ef6a5 ZJS |
1373 | int socket_load_service_unit(Socket *s, int cfd, Unit **ret) { |
1374 | /* Figure out what the unit that will be used to handle the connections on the socket looks like. | |
1375 | * | |
1376 | * If cfd < 0, then we don't have a connection yet. In case of Accept=yes sockets, use a fake | |
1377 | * instance name. | |
1378 | */ | |
1379 | ||
1380 | if (UNIT_ISSET(s->service)) { | |
1381 | *ret = UNIT_DEREF(s->service); | |
1382 | return 0; | |
1383 | } | |
1384 | ||
1385 | if (!s->accept) | |
1386 | return -ENODATA; | |
1387 | ||
1388 | /* Build the instance name and load the unit */ | |
1389 | _cleanup_free_ char *prefix = NULL, *instance = NULL, *name = NULL; | |
1390 | int r; | |
1391 | ||
1392 | r = unit_name_to_prefix(UNIT(s)->id, &prefix); | |
1393 | if (r < 0) | |
1394 | return r; | |
1395 | ||
1396 | if (cfd >= 0) { | |
1397 | r = instance_from_socket(cfd, s->n_accepted, &instance); | |
86e045ec ZJS |
1398 | if (ERRNO_IS_DISCONNECT(r)) |
1399 | /* ENOTCONN is legitimate if TCP RST was received. Other socket families might return | |
1400 | * different errors. This connection is over, but the socket unit lives on. */ | |
934ef6a5 | 1401 | return log_unit_debug_errno(UNIT(s), r, |
86e045ec ZJS |
1402 | "Got %s on incoming socket, assuming aborted connection attempt, ignoring.", |
1403 | errno_to_name(r)); | |
934ef6a5 ZJS |
1404 | if (r < 0) |
1405 | return r; | |
1406 | } | |
1407 | ||
1408 | /* For accepting sockets, we don't know how the instance will be called until we get a connection and | |
1409 | * can figure out what the peer name is. So let's use "internal" as the instance to make it clear | |
1410 | * that this is not an actual peer name. We use "unknown" when we cannot figure out the peer. */ | |
1411 | r = unit_name_build(prefix, instance ?: "internal", ".service", &name); | |
1412 | if (r < 0) | |
1413 | return r; | |
1414 | ||
1415 | return manager_load_unit(UNIT(s)->manager, name, NULL, NULL, ret); | |
1416 | } | |
1417 | ||
d24e561d | 1418 | static int socket_determine_selinux_label(Socket *s, char **ret) { |
d24e561d LP |
1419 | int r; |
1420 | ||
1421 | assert(s); | |
1422 | assert(ret); | |
1423 | ||
1424 | if (s->selinux_context_from_net) { | |
934ef6a5 | 1425 | /* If this is requested, get the label from the network label */ |
d24e561d LP |
1426 | |
1427 | r = mac_selinux_get_our_label(ret); | |
1428 | if (r == -EOPNOTSUPP) | |
1429 | goto no_label; | |
1430 | ||
1431 | } else { | |
934ef6a5 | 1432 | /* Otherwise, get it from the executable we are about to start. */ |
d24e561d | 1433 | |
934ef6a5 ZJS |
1434 | Unit *service; |
1435 | ExecCommand *c; | |
1436 | _cleanup_free_ char *path = NULL; | |
1437 | ||
1438 | r = socket_load_service_unit(s, -1, &service); | |
1439 | if (r == -ENODATA) | |
d24e561d | 1440 | goto no_label; |
934ef6a5 ZJS |
1441 | if (r < 0) |
1442 | return r; | |
d24e561d | 1443 | |
934ef6a5 | 1444 | c = SERVICE(service)->exec_command[SERVICE_EXEC_START]; |
d24e561d LP |
1445 | if (!c) |
1446 | goto no_label; | |
1447 | ||
934ef6a5 | 1448 | r = chase_symlinks(c->path, SERVICE(service)->exec_context.root_directory, CHASE_PREFIX_ROOT, &path, NULL); |
2ef044ea FB |
1449 | if (r < 0) |
1450 | goto no_label; | |
1451 | ||
416be1a0 | 1452 | r = mac_selinux_get_create_label_from_exe(path, ret); |
4c701096 | 1453 | if (IN_SET(r, -EPERM, -EOPNOTSUPP)) |
d24e561d LP |
1454 | goto no_label; |
1455 | } | |
1456 | ||
1457 | return r; | |
1458 | ||
1459 | no_label: | |
1460 | *ret = NULL; | |
1461 | return 0; | |
1462 | } | |
1463 | ||
a79279c7 LP |
1464 | static int socket_address_listen_do( |
1465 | Socket *s, | |
1466 | const SocketAddress *address, | |
1467 | const char *label) { | |
1468 | ||
1469 | assert(s); | |
1470 | assert(address); | |
1471 | ||
1472 | return socket_address_listen( | |
1473 | address, | |
1474 | SOCK_CLOEXEC|SOCK_NONBLOCK, | |
1475 | s->backlog, | |
1476 | s->bind_ipv6_only, | |
1477 | s->bind_to_device, | |
1478 | s->reuse_port, | |
1479 | s->free_bind, | |
1480 | s->transparent, | |
1481 | s->directory_mode, | |
1482 | s->socket_mode, | |
1483 | label); | |
1484 | } | |
1485 | ||
65486032 YW |
1486 | #define log_address_error_errno(u, address, error, fmt) \ |
1487 | ({ \ | |
1488 | _cleanup_free_ char *_t = NULL; \ | |
1489 | \ | |
1490 | (void) socket_address_print(address, &_t); \ | |
1491 | log_unit_error_errno(u, error, fmt, strna(_t)); \ | |
1492 | }) | |
ae05e1b6 | 1493 | |
7619cb32 LP |
1494 | static int fork_needed(const SocketAddress *address, const ExecContext *context) { |
1495 | int r; | |
1496 | ||
1497 | assert(address); | |
1498 | assert(context); | |
1499 | ||
1500 | /* Check if we need to do the cgroup or netns stuff. If not we can do things much simpler. */ | |
1501 | ||
1502 | if (IN_SET(address->sockaddr.sa.sa_family, AF_INET, AF_INET6)) { | |
1503 | r = bpf_firewall_supported(); | |
1504 | if (r < 0) | |
1505 | return r; | |
1506 | if (r != BPF_FIREWALL_UNSUPPORTED) /* If BPF firewalling isn't supported anyway — there's no point in this forking complexity */ | |
1507 | return true; | |
1508 | } | |
1509 | ||
1510 | return context->private_network || context->network_namespace_path; | |
1511 | } | |
1512 | ||
a79279c7 LP |
1513 | static int socket_address_listen_in_cgroup( |
1514 | Socket *s, | |
1515 | const SocketAddress *address, | |
1516 | const char *label) { | |
1517 | ||
1518 | _cleanup_close_pair_ int pair[2] = { -1, -1 }; | |
1519 | int fd, r; | |
1520 | pid_t pid; | |
1521 | ||
1522 | assert(s); | |
1523 | assert(address); | |
1524 | ||
7619cb32 LP |
1525 | /* This is a wrapper around socket_address_listen(), that forks off a helper process inside the |
1526 | * socket's cgroup and network namespace in which the socket is actually created. This way we ensure | |
1527 | * the socket is actually properly attached to the unit's cgroup for the purpose of BPF filtering and | |
1528 | * such. */ | |
a79279c7 | 1529 | |
7619cb32 | 1530 | r = fork_needed(address, &s->exec_context); |
a79279c7 LP |
1531 | if (r < 0) |
1532 | return r; | |
7619cb32 LP |
1533 | if (r == 0) { |
1534 | /* Shortcut things... */ | |
1535 | fd = socket_address_listen_do(s, address, label); | |
1536 | if (fd < 0) | |
1537 | return log_address_error_errno(UNIT(s), address, fd, "Failed to create listening socket (%s): %m"); | |
1538 | ||
1539 | return fd; | |
1540 | } | |
1541 | ||
1542 | r = unit_setup_exec_runtime(UNIT(s)); | |
1543 | if (r < 0) | |
1544 | return log_unit_error_errno(UNIT(s), r, "Failed acquire runtime: %m"); | |
1545 | ||
1546 | if (s->exec_context.network_namespace_path && | |
1547 | s->exec_runtime && | |
1548 | s->exec_runtime->netns_storage_socket[0] >= 0) { | |
54c2459d | 1549 | r = open_shareable_ns_path(s->exec_runtime->netns_storage_socket, s->exec_context.network_namespace_path, CLONE_NEWNET); |
7619cb32 LP |
1550 | if (r < 0) |
1551 | return log_unit_error_errno(UNIT(s), r, "Failed to open network namespace path %s: %m", s->exec_context.network_namespace_path); | |
1552 | } | |
a79279c7 | 1553 | |
a70581ff XR |
1554 | if (s->exec_context.ipc_namespace_path && |
1555 | s->exec_runtime && | |
1556 | s->exec_runtime->ipcns_storage_socket[0] >= 0) { | |
e3790c14 | 1557 | r = open_shareable_ns_path(s->exec_runtime->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 | ||
7619cb32 LP |
1573 | if ((s->exec_context.private_network || s->exec_context.network_namespace_path) && |
1574 | s->exec_runtime && | |
1575 | s->exec_runtime->netns_storage_socket[0] >= 0) { | |
1576 | ||
1577 | if (ns_type_supported(NAMESPACE_NET)) { | |
54c2459d | 1578 | r = setup_shareable_ns(s->exec_runtime->netns_storage_socket, CLONE_NEWNET); |
7619cb32 LP |
1579 | if (r < 0) { |
1580 | log_unit_error_errno(UNIT(s), r, "Failed to join network namespace: %m"); | |
1581 | _exit(EXIT_NETWORK); | |
1582 | } | |
1583 | } else if (s->exec_context.network_namespace_path) { | |
1584 | log_unit_error(UNIT(s), "Network namespace path configured but network namespaces not supported."); | |
1585 | _exit(EXIT_NETWORK); | |
1586 | } else | |
1587 | log_unit_warning(UNIT(s), "PrivateNetwork=yes is configured, but the kernel does not support network namespaces, ignoring."); | |
1588 | } | |
1589 | ||
a79279c7 LP |
1590 | fd = socket_address_listen_do(s, address, label); |
1591 | if (fd < 0) { | |
ae05e1b6 | 1592 | log_address_error_errno(UNIT(s), address, fd, "Failed to create listening socket (%s): %m"); |
a79279c7 LP |
1593 | _exit(EXIT_FAILURE); |
1594 | } | |
1595 | ||
1596 | r = send_one_fd(pair[1], fd, 0); | |
1597 | if (r < 0) { | |
ae05e1b6 | 1598 | log_address_error_errno(UNIT(s), address, r, "Failed to send listening socket (%s) to parent: %m"); |
a79279c7 LP |
1599 | _exit(EXIT_FAILURE); |
1600 | } | |
1601 | ||
1602 | _exit(EXIT_SUCCESS); | |
1603 | } | |
1604 | ||
1605 | pair[1] = safe_close(pair[1]); | |
1606 | fd = receive_one_fd(pair[0], 0); | |
1607 | ||
1608 | /* We synchronously wait for the helper, as it shouldn't be slow */ | |
d2e0ac3d | 1609 | r = wait_for_terminate_and_check("(sd-listen)", pid, WAIT_LOG_ABNORMAL); |
a79279c7 LP |
1610 | if (r < 0) { |
1611 | safe_close(fd); | |
1612 | return r; | |
1613 | } | |
1614 | ||
1615 | if (fd < 0) | |
ae05e1b6 | 1616 | return log_address_error_errno(UNIT(s), address, fd, "Failed to receive listening socket (%s): %m"); |
a79279c7 LP |
1617 | |
1618 | return fd; | |
a79279c7 LP |
1619 | } |
1620 | ||
fd421c4a | 1621 | DEFINE_TRIVIAL_CLEANUP_FUNC_FULL(Socket *, socket_close_fds, NULL); |
e5417345 | 1622 | |
75db809a ZJS |
1623 | static int socket_open_fds(Socket *orig_s) { |
1624 | _cleanup_(socket_close_fdsp) Socket *s = orig_s; | |
710a6b50 LP |
1625 | _cleanup_(mac_selinux_freep) char *label = NULL; |
1626 | bool know_label = false; | |
83c60c9f LP |
1627 | SocketPort *p; |
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: |
b15bdda8 | 1728 | assert_not_reached("Unknown port type"); |
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) { | |
1737 | SocketPort *p; | |
718db961 | 1738 | int r; |
9152c765 | 1739 | |
034c6ed7 LP |
1740 | assert(s); |
1741 | ||
1742 | LIST_FOREACH(port, p, s->ports) { | |
1743 | if (p->fd < 0) | |
1744 | continue; | |
1745 | ||
a4152e3f LP |
1746 | if (!p->event_source) |
1747 | continue; | |
1748 | ||
1749 | r = sd_event_source_set_enabled(p->event_source, SD_EVENT_OFF); | |
1750 | if (r < 0) | |
f2341e0a | 1751 | log_unit_debug_errno(UNIT(s), r, "Failed to disable event source: %m"); |
83c60c9f | 1752 | } |
034c6ed7 LP |
1753 | } |
1754 | ||
1755 | static int socket_watch_fds(Socket *s) { | |
1756 | SocketPort *p; | |
1757 | int r; | |
1758 | ||
1759 | assert(s); | |
83c60c9f | 1760 | |
034c6ed7 LP |
1761 | LIST_FOREACH(port, p, s->ports) { |
1762 | if (p->fd < 0) | |
1763 | continue; | |
1764 | ||
cbf60d0a | 1765 | if (p->event_source) { |
718db961 | 1766 | r = sd_event_source_set_enabled(p->event_source, SD_EVENT_ON); |
cbf60d0a LP |
1767 | if (r < 0) |
1768 | goto fail; | |
1769 | } else { | |
151b9b96 | 1770 | r = sd_event_add_io(UNIT(s)->manager->event, &p->event_source, p->fd, EPOLLIN, socket_dispatch_io, p); |
cbf60d0a LP |
1771 | if (r < 0) |
1772 | goto fail; | |
4f2d528d | 1773 | |
cbf60d0a | 1774 | (void) sd_event_source_set_description(p->event_source, "socket-port-io"); |
718db961 | 1775 | } |
034c6ed7 | 1776 | } |
83c60c9f | 1777 | |
542563ba | 1778 | return 0; |
83c60c9f | 1779 | |
034c6ed7 | 1780 | fail: |
cbf60d0a | 1781 | log_unit_warning_errno(UNIT(s), r, "Failed to watch listening fds: %m"); |
034c6ed7 LP |
1782 | socket_unwatch_fds(s); |
1783 | return r; | |
1784 | } | |
1785 | ||
01a8b467 LP |
1786 | enum { |
1787 | SOCKET_OPEN_NONE, | |
1788 | SOCKET_OPEN_SOME, | |
1789 | SOCKET_OPEN_ALL, | |
1790 | }; | |
1791 | ||
1792 | static int socket_check_open(Socket *s) { | |
1793 | bool have_open = false, have_closed = false; | |
1794 | SocketPort *p; | |
1795 | ||
1796 | assert(s); | |
1797 | ||
1798 | LIST_FOREACH(port, p, s->ports) { | |
1799 | if (p->fd < 0) | |
1800 | have_closed = true; | |
1801 | else | |
1802 | have_open = true; | |
1803 | ||
1804 | if (have_open && have_closed) | |
1805 | return SOCKET_OPEN_SOME; | |
1806 | } | |
1807 | ||
1808 | if (have_open) | |
1809 | return SOCKET_OPEN_ALL; | |
1810 | ||
1811 | return SOCKET_OPEN_NONE; | |
1812 | } | |
1813 | ||
034c6ed7 LP |
1814 | static void socket_set_state(Socket *s, SocketState state) { |
1815 | SocketState old_state; | |
1816 | assert(s); | |
1817 | ||
6fcbec6f LP |
1818 | if (s->state != state) |
1819 | bus_unit_send_pending_change_signal(UNIT(s), false); | |
1820 | ||
034c6ed7 LP |
1821 | old_state = s->state; |
1822 | s->state = state; | |
1823 | ||
bd1fe7c7 LP |
1824 | if (!IN_SET(state, |
1825 | SOCKET_START_PRE, | |
3900e5fd | 1826 | SOCKET_START_CHOWN, |
bd1fe7c7 LP |
1827 | SOCKET_START_POST, |
1828 | SOCKET_STOP_PRE, | |
1829 | SOCKET_STOP_PRE_SIGTERM, | |
1830 | SOCKET_STOP_PRE_SIGKILL, | |
1831 | SOCKET_STOP_POST, | |
1832 | SOCKET_FINAL_SIGTERM, | |
c968d76a YW |
1833 | SOCKET_FINAL_SIGKILL, |
1834 | SOCKET_CLEANING)) { | |
718db961 | 1835 | |
5dcadb4c | 1836 | s->timer_event_source = sd_event_source_disable_unref(s->timer_event_source); |
5e94833f | 1837 | socket_unwatch_control_pid(s); |
034c6ed7 | 1838 | s->control_command = NULL; |
a16e1123 | 1839 | s->control_command_id = _SOCKET_EXEC_COMMAND_INVALID; |
e537352b | 1840 | } |
034c6ed7 | 1841 | |
a16e1123 LP |
1842 | if (state != SOCKET_LISTENING) |
1843 | socket_unwatch_fds(s); | |
1844 | ||
bd1fe7c7 | 1845 | if (!IN_SET(state, |
3900e5fd | 1846 | SOCKET_START_CHOWN, |
bd1fe7c7 LP |
1847 | SOCKET_START_POST, |
1848 | SOCKET_LISTENING, | |
1849 | SOCKET_RUNNING, | |
1850 | SOCKET_STOP_PRE, | |
1851 | SOCKET_STOP_PRE_SIGTERM, | |
c968d76a YW |
1852 | SOCKET_STOP_PRE_SIGKILL, |
1853 | SOCKET_CLEANING)) | |
034c6ed7 LP |
1854 | socket_close_fds(s); |
1855 | ||
e537352b | 1856 | if (state != old_state) |
f2341e0a | 1857 | log_unit_debug(UNIT(s), "Changed %s -> %s", socket_state_to_string(old_state), socket_state_to_string(state)); |
acbb0225 | 1858 | |
2ad2e41a | 1859 | unit_notify(UNIT(s), state_translation_table[old_state], state_translation_table[state], 0); |
034c6ed7 LP |
1860 | } |
1861 | ||
be847e82 | 1862 | static int socket_coldplug(Unit *u) { |
a16e1123 LP |
1863 | Socket *s = SOCKET(u); |
1864 | int r; | |
1865 | ||
1866 | assert(s); | |
1867 | assert(s->state == SOCKET_DEAD); | |
1868 | ||
e821075a LP |
1869 | if (s->deserialized_state == s->state) |
1870 | return 0; | |
a16e1123 | 1871 | |
c386f588 LP |
1872 | if (s->control_pid > 0 && |
1873 | pid_is_unwaited(s->control_pid) && | |
1874 | IN_SET(s->deserialized_state, | |
3900e5fd LP |
1875 | SOCKET_START_PRE, |
1876 | SOCKET_START_CHOWN, | |
1877 | SOCKET_START_POST, | |
1878 | SOCKET_STOP_PRE, | |
1879 | SOCKET_STOP_PRE_SIGTERM, | |
1880 | SOCKET_STOP_PRE_SIGKILL, | |
1881 | SOCKET_STOP_POST, | |
1882 | SOCKET_FINAL_SIGTERM, | |
c968d76a YW |
1883 | SOCKET_FINAL_SIGKILL, |
1884 | SOCKET_CLEANING)) { | |
a16e1123 | 1885 | |
f75f613d | 1886 | r = unit_watch_pid(UNIT(s), s->control_pid, false); |
e821075a LP |
1887 | if (r < 0) |
1888 | return r; | |
a16e1123 | 1889 | |
36c16a7c | 1890 | r = socket_arm_timer(s, usec_add(u->state_change_timestamp.monotonic, s->timeout_usec)); |
e821075a LP |
1891 | if (r < 0) |
1892 | return r; | |
1893 | } | |
a16e1123 | 1894 | |
3900e5fd LP |
1895 | if (IN_SET(s->deserialized_state, |
1896 | SOCKET_START_CHOWN, | |
1897 | SOCKET_START_POST, | |
1898 | SOCKET_LISTENING, | |
01a8b467 LP |
1899 | SOCKET_RUNNING)) { |
1900 | ||
1901 | /* Originally, we used to simply reopen all sockets here that we didn't have file descriptors | |
5238e957 | 1902 | * for. However, this is problematic, as we won't traverse through the SOCKET_START_CHOWN state for |
01a8b467 LP |
1903 | * them, and thus the UID/GID wouldn't be right. Hence, instead simply check if we have all fds open, |
1904 | * and if there's a mismatch, warn loudly. */ | |
1905 | ||
1906 | r = socket_check_open(s); | |
1907 | if (r == SOCKET_OPEN_NONE) | |
1908 | log_unit_warning(UNIT(s), | |
1909 | "Socket unit configuration has changed while unit has been running, " | |
1910 | "no open socket file descriptor left. " | |
1911 | "The socket unit is not functional until restarted."); | |
1912 | else if (r == SOCKET_OPEN_SOME) | |
1913 | log_unit_warning(UNIT(s), | |
1914 | "Socket unit configuration has changed while unit has been running, " | |
1915 | "and some socket file descriptors have not been opened yet. " | |
1916 | "The socket unit is not fully functional until restarted."); | |
e821075a | 1917 | } |
a16e1123 | 1918 | |
e821075a LP |
1919 | if (s->deserialized_state == SOCKET_LISTENING) { |
1920 | r = socket_watch_fds(s); | |
1921 | if (r < 0) | |
1922 | return r; | |
a16e1123 LP |
1923 | } |
1924 | ||
c968d76a | 1925 | if (!IN_SET(s->deserialized_state, SOCKET_DEAD, SOCKET_FAILED, SOCKET_CLEANING)) { |
29206d46 | 1926 | (void) unit_setup_dynamic_creds(u); |
e8a565cb YW |
1927 | (void) unit_setup_exec_runtime(u); |
1928 | } | |
29206d46 | 1929 | |
e821075a | 1930 | socket_set_state(s, s->deserialized_state); |
a16e1123 LP |
1931 | return 0; |
1932 | } | |
1933 | ||
e537352b | 1934 | static int socket_spawn(Socket *s, ExecCommand *c, pid_t *_pid) { |
3c7416b6 | 1935 | |
b9c04eaf | 1936 | _cleanup_(exec_params_clear) ExecParameters exec_params = { |
5686391b LP |
1937 | .flags = EXEC_APPLY_SANDBOXING|EXEC_APPLY_CHROOT|EXEC_APPLY_TTY_STDIN, |
1938 | .stdin_fd = -1, | |
1939 | .stdout_fd = -1, | |
1940 | .stderr_fd = -1, | |
1941 | .exec_fd = -1, | |
9fa95f85 | 1942 | }; |
3c7416b6 LP |
1943 | pid_t pid; |
1944 | int r; | |
034c6ed7 LP |
1945 | |
1946 | assert(s); | |
1947 | assert(c); | |
1948 | assert(_pid); | |
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, |
29206d46 | 1967 | &s->dynamic_creds, |
9e2f7c11 | 1968 | &pid); |
cee288ad | 1969 | if (r < 0) |
36c16a7c | 1970 | return r; |
9e2f7c11 | 1971 | |
f75f613d | 1972 | r = unit_watch_pid(UNIT(s), pid, true); |
9e2f7c11 | 1973 | if (r < 0) |
36c16a7c | 1974 | return r; |
034c6ed7 | 1975 | |
3900e5fd | 1976 | *_pid = pid; |
3536f49e | 1977 | |
3900e5fd | 1978 | return 0; |
3900e5fd LP |
1979 | } |
1980 | ||
1981 | static int socket_chown(Socket *s, pid_t *_pid) { | |
1982 | pid_t pid; | |
1983 | int r; | |
1984 | ||
36c16a7c | 1985 | r = socket_arm_timer(s, usec_add(now(CLOCK_MONOTONIC), s->timeout_usec)); |
3900e5fd LP |
1986 | if (r < 0) |
1987 | goto fail; | |
1988 | ||
1989 | /* We have to resolve the user names out-of-process, hence | |
1990 | * let's fork here. It's messy, but well, what can we do? */ | |
1991 | ||
4c253ed1 | 1992 | r = unit_fork_helper_process(UNIT(s), "(sd-chown)", &pid); |
a79279c7 LP |
1993 | if (r < 0) |
1994 | return r; | |
1995 | if (r == 0) { | |
fed1e721 LP |
1996 | uid_t uid = UID_INVALID; |
1997 | gid_t gid = GID_INVALID; | |
a79279c7 | 1998 | SocketPort *p; |
3900e5fd | 1999 | |
a79279c7 | 2000 | /* Child */ |
3900e5fd LP |
2001 | |
2002 | if (!isempty(s->user)) { | |
2003 | const char *user = s->user; | |
2004 | ||
fafff8f1 | 2005 | r = get_user_creds(&user, &uid, &gid, NULL, NULL, 0); |
3900e5fd | 2006 | if (r < 0) { |
a79279c7 LP |
2007 | log_unit_error_errno(UNIT(s), r, "Failed to resolve user %s: %m", user); |
2008 | _exit(EXIT_USER); | |
3900e5fd LP |
2009 | } |
2010 | } | |
2011 | ||
2012 | if (!isempty(s->group)) { | |
2013 | const char *group = s->group; | |
2014 | ||
fafff8f1 | 2015 | r = get_group_creds(&group, &gid, 0); |
3900e5fd | 2016 | if (r < 0) { |
a79279c7 LP |
2017 | log_unit_error_errno(UNIT(s), r, "Failed to resolve group %s: %m", group); |
2018 | _exit(EXIT_GROUP); | |
3900e5fd LP |
2019 | } |
2020 | } | |
2021 | ||
2022 | LIST_FOREACH(port, p, s->ports) { | |
e5a1c18d | 2023 | const char *path = NULL; |
3900e5fd LP |
2024 | |
2025 | if (p->type == SOCKET_SOCKET) | |
2026 | path = socket_address_get_path(&p->address); | |
2027 | else if (p->type == SOCKET_FIFO) | |
2028 | path = p->path; | |
2029 | ||
2030 | if (!path) | |
2031 | continue; | |
2032 | ||
2033 | if (chown(path, uid, gid) < 0) { | |
a79279c7 LP |
2034 | log_unit_error_errno(UNIT(s), errno, "Failed to chown(): %m"); |
2035 | _exit(EXIT_CHOWN); | |
3900e5fd LP |
2036 | } |
2037 | } | |
2038 | ||
a79279c7 | 2039 | _exit(EXIT_SUCCESS); |
3900e5fd LP |
2040 | } |
2041 | ||
f75f613d | 2042 | r = unit_watch_pid(UNIT(s), pid, true); |
718db961 | 2043 | if (r < 0) |
034c6ed7 | 2044 | goto fail; |
83c60c9f | 2045 | |
034c6ed7 | 2046 | *_pid = pid; |
034c6ed7 LP |
2047 | return 0; |
2048 | ||
2049 | fail: | |
5dcadb4c | 2050 | s->timer_event_source = sd_event_source_disable_unref(s->timer_event_source); |
83c60c9f | 2051 | return r; |
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 | ||
e8a565cb | 2069 | s->exec_runtime = exec_runtime_unref(s->exec_runtime, true); |
613b411c | 2070 | |
bb0c0d6f | 2071 | unit_destroy_runtime_data(UNIT(s), &s->exec_context); |
e66cf1a3 | 2072 | |
00d9ef85 LP |
2073 | unit_unref_uid_gid(UNIT(s), true); |
2074 | ||
29206d46 | 2075 | dynamic_creds_destroy(&s->dynamic_creds); |
034c6ed7 LP |
2076 | } |
2077 | ||
cfc4eb4c | 2078 | static void socket_enter_signal(Socket *s, SocketState state, SocketResult f); |
80876c20 | 2079 | |
cfc4eb4c | 2080 | static void socket_enter_stop_post(Socket *s, SocketResult f) { |
034c6ed7 LP |
2081 | int r; |
2082 | assert(s); | |
2083 | ||
a0fef983 | 2084 | if (s->result == SOCKET_SUCCESS) |
cfc4eb4c | 2085 | s->result = f; |
034c6ed7 | 2086 | |
5e94833f | 2087 | socket_unwatch_control_pid(s); |
a16e1123 | 2088 | s->control_command_id = SOCKET_EXEC_STOP_POST; |
3900e5fd | 2089 | s->control_command = s->exec_command[SOCKET_EXEC_STOP_POST]; |
a16e1123 | 2090 | |
3900e5fd LP |
2091 | if (s->control_command) { |
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), |
cd2086fe LP |
2129 | -1, |
2130 | s->control_pid, | |
2131 | false); | |
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 LP |
2172 | if (s->control_command) { |
2173 | r = socket_spawn(s, s->control_command, &s->control_pid); | |
2174 | if (r < 0) | |
034c6ed7 LP |
2175 | goto fail; |
2176 | ||
80876c20 LP |
2177 | socket_set_state(s, SOCKET_STOP_PRE); |
2178 | } else | |
cfc4eb4c | 2179 | socket_enter_stop_post(s, SOCKET_SUCCESS); |
034c6ed7 LP |
2180 | |
2181 | return; | |
2182 | ||
2183 | fail: | |
f2341e0a | 2184 | log_unit_warning_errno(UNIT(s), r, "Failed to run 'stop-pre' task: %m"); |
cfc4eb4c | 2185 | socket_enter_stop_post(s, SOCKET_FAILURE_RESOURCES); |
034c6ed7 LP |
2186 | } |
2187 | ||
e9af15c3 LP |
2188 | static void socket_enter_listening(Socket *s) { |
2189 | int r; | |
2190 | assert(s); | |
2191 | ||
3e5f04bf RM |
2192 | if (!s->accept && s->flush_pending) { |
2193 | log_unit_debug(UNIT(s), "Flushing socket before listening."); | |
2194 | flush_ports(s); | |
2195 | } | |
2196 | ||
cfc4eb4c LP |
2197 | r = socket_watch_fds(s); |
2198 | if (r < 0) { | |
f2341e0a | 2199 | log_unit_warning_errno(UNIT(s), r, "Failed to watch sockets: %m"); |
e9af15c3 LP |
2200 | goto fail; |
2201 | } | |
2202 | ||
2203 | socket_set_state(s, SOCKET_LISTENING); | |
2204 | return; | |
2205 | ||
2206 | fail: | |
cfc4eb4c | 2207 | socket_enter_stop_pre(s, SOCKET_FAILURE_RESOURCES); |
e9af15c3 LP |
2208 | } |
2209 | ||
034c6ed7 LP |
2210 | static void socket_enter_start_post(Socket *s) { |
2211 | int r; | |
2212 | assert(s); | |
2213 | ||
3900e5fd LP |
2214 | socket_unwatch_control_pid(s); |
2215 | s->control_command_id = SOCKET_EXEC_START_POST; | |
2216 | s->control_command = s->exec_command[SOCKET_EXEC_START_POST]; | |
2217 | ||
2218 | if (s->control_command) { | |
2219 | r = socket_spawn(s, s->control_command, &s->control_pid); | |
2220 | if (r < 0) { | |
f2341e0a | 2221 | log_unit_warning_errno(UNIT(s), r, "Failed to run 'start-post' task: %m"); |
3900e5fd LP |
2222 | goto fail; |
2223 | } | |
2224 | ||
2225 | socket_set_state(s, SOCKET_START_POST); | |
2226 | } else | |
2227 | socket_enter_listening(s); | |
2228 | ||
2229 | return; | |
2230 | ||
2231 | fail: | |
2232 | socket_enter_stop_pre(s, SOCKET_FAILURE_RESOURCES); | |
2233 | } | |
2234 | ||
2235 | static void socket_enter_start_chown(Socket *s) { | |
2236 | int r; | |
2237 | ||
2238 | assert(s); | |
2239 | ||
cfc4eb4c LP |
2240 | r = socket_open_fds(s); |
2241 | if (r < 0) { | |
f2341e0a | 2242 | log_unit_warning_errno(UNIT(s), r, "Failed to listen on sockets: %m"); |
034c6ed7 LP |
2243 | goto fail; |
2244 | } | |
2245 | ||
3900e5fd | 2246 | if (!isempty(s->user) || !isempty(s->group)) { |
5e94833f | 2247 | |
3900e5fd LP |
2248 | socket_unwatch_control_pid(s); |
2249 | s->control_command_id = SOCKET_EXEC_START_CHOWN; | |
2250 | s->control_command = NULL; | |
a16e1123 | 2251 | |
3900e5fd | 2252 | r = socket_chown(s, &s->control_pid); |
cfc4eb4c | 2253 | if (r < 0) { |
f2341e0a | 2254 | log_unit_warning_errno(UNIT(s), r, "Failed to fork 'start-chown' task: %m"); |
034c6ed7 LP |
2255 | goto fail; |
2256 | } | |
2257 | ||
3900e5fd | 2258 | socket_set_state(s, SOCKET_START_CHOWN); |
80876c20 | 2259 | } else |
3900e5fd | 2260 | socket_enter_start_post(s); |
034c6ed7 LP |
2261 | |
2262 | return; | |
2263 | ||
2264 | fail: | |
cfc4eb4c | 2265 | socket_enter_stop_pre(s, SOCKET_FAILURE_RESOURCES); |
034c6ed7 LP |
2266 | } |
2267 | ||
2268 | static void socket_enter_start_pre(Socket *s) { | |
2269 | int r; | |
2270 | assert(s); | |
2271 | ||
5e94833f | 2272 | socket_unwatch_control_pid(s); |
a4634b21 | 2273 | |
4c425434 | 2274 | unit_warn_leftover_processes(UNIT(s), unit_log_leftover_process_start); |
a4634b21 | 2275 | |
a16e1123 | 2276 | s->control_command_id = SOCKET_EXEC_START_PRE; |
3900e5fd | 2277 | s->control_command = s->exec_command[SOCKET_EXEC_START_PRE]; |
a16e1123 | 2278 | |
3900e5fd | 2279 | if (s->control_command) { |
e821075a | 2280 | r = socket_spawn(s, s->control_command, &s->control_pid); |
3900e5fd | 2281 | if (r < 0) { |
f2341e0a | 2282 | log_unit_warning_errno(UNIT(s), r, "Failed to run 'start-pre' task: %m"); |
034c6ed7 | 2283 | goto fail; |
3900e5fd | 2284 | } |
034c6ed7 | 2285 | |
80876c20 LP |
2286 | socket_set_state(s, SOCKET_START_PRE); |
2287 | } else | |
3900e5fd | 2288 | socket_enter_start_chown(s); |
034c6ed7 LP |
2289 | |
2290 | return; | |
2291 | ||
2292 | fail: | |
cfc4eb4c | 2293 | socket_enter_dead(s, SOCKET_FAILURE_RESOURCES); |
034c6ed7 LP |
2294 | } |
2295 | ||
60d9771c LP |
2296 | static void flush_ports(Socket *s) { |
2297 | SocketPort *p; | |
2298 | ||
2299 | /* Flush all incoming traffic, regardless if actual bytes or new connections, so that this socket isn't busy | |
2300 | * anymore */ | |
2301 | ||
2302 | LIST_FOREACH(port, p, s->ports) { | |
2303 | if (p->fd < 0) | |
2304 | continue; | |
2305 | ||
2306 | (void) flush_accept(p->fd); | |
2307 | (void) flush_fd(p->fd); | |
2308 | } | |
2309 | } | |
2310 | ||
5cf09553 ZJS |
2311 | static void socket_enter_running(Socket *s, int cfd_in) { |
2312 | /* Note that this call takes possession of the connection fd passed. It either has to assign it | |
2313 | * somewhere or close it. */ | |
2314 | _cleanup_close_ int cfd = cfd_in; | |
2315 | ||
4afd3348 | 2316 | _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL; |
034c6ed7 LP |
2317 | int r; |
2318 | ||
2319 | assert(s); | |
2320 | ||
60d9771c | 2321 | /* We don't take connections anymore if we are supposed to shut down anyway */ |
31afa0a4 | 2322 | if (unit_stop_pending(UNIT(s))) { |
e821075a | 2323 | |
f2341e0a | 2324 | log_unit_debug(UNIT(s), "Suppressing connection request since unit stop is scheduled."); |
5d909e3e | 2325 | |
7c610628 | 2326 | if (cfd >= 0) |
a98f7575 | 2327 | goto refuse; |
7c610628 | 2328 | |
5cf09553 | 2329 | flush_ports(s); |
ba3e67a7 LP |
2330 | return; |
2331 | } | |
2332 | ||
7994ac1d | 2333 | if (!ratelimit_below(&s->trigger_limit)) { |
8b26cdbd LP |
2334 | log_unit_warning(UNIT(s), "Trigger limit hit, refusing further activation."); |
2335 | socket_enter_stop_pre(s, SOCKET_FAILURE_TRIGGER_LIMIT_HIT); | |
a98f7575 | 2336 | goto refuse; |
8b26cdbd LP |
2337 | } |
2338 | ||
4f2d528d | 2339 | if (cfd < 0) { |
f976f3f6 | 2340 | bool pending = false; |
eef85c4a | 2341 | Unit *other; |
f976f3f6 | 2342 | |
15ed3c3a LP |
2343 | /* If there's already a start pending don't bother to do anything */ |
2344 | UNIT_FOREACH_DEPENDENCY(other, UNIT(s), UNIT_ATOM_TRIGGERS) | |
e821075a | 2345 | if (unit_active_or_pending(other)) { |
57020a3a LP |
2346 | pending = true; |
2347 | break; | |
2348 | } | |
f976f3f6 | 2349 | |
1a710b43 | 2350 | if (!pending) { |
640ace4a | 2351 | if (!UNIT_ISSET(s->service)) { |
86e045ec ZJS |
2352 | r = log_unit_error_errno(UNIT(s), SYNTHETIC_ERRNO(ENOENT), |
2353 | "Service to activate vanished, refusing activation."); | |
640ace4a LP |
2354 | goto fail; |
2355 | } | |
2356 | ||
50cbaba4 | 2357 | r = manager_add_job(UNIT(s)->manager, JOB_START, UNIT_DEREF(s->service), JOB_REPLACE, NULL, &error, NULL); |
1a710b43 | 2358 | if (r < 0) |
f976f3f6 | 2359 | goto fail; |
1a710b43 | 2360 | } |
4f2d528d LP |
2361 | |
2362 | socket_set_state(s, SOCKET_RUNNING); | |
2363 | } else { | |
9d565427 | 2364 | _cleanup_(socket_peer_unrefp) SocketPeer *p = NULL; |
b669c20f | 2365 | Unit *service; |
4f2d528d | 2366 | |
6cf6bbc2 | 2367 | if (s->n_connections >= s->max_connections) { |
ea8f50f8 | 2368 | log_unit_warning(UNIT(s), "Too many incoming connections (%u), dropping connection.", |
166cf510 | 2369 | s->n_connections); |
a98f7575 | 2370 | goto refuse; |
6cf6bbc2 LP |
2371 | } |
2372 | ||
9d565427 | 2373 | if (s->max_connections_per_source > 0) { |
166cf510 | 2374 | r = socket_acquire_peer(s, cfd, &p); |
86e045ec | 2375 | if (ERRNO_IS_DISCONNECT(r)) |
5cf09553 | 2376 | return; |
86e045ec ZJS |
2377 | if (r < 0) /* We didn't have enough resources to acquire peer information, let's fail. */ |
2378 | goto fail; | |
934ef6a5 | 2379 | if (r > 0 && p->n_ref > s->max_connections_per_source) { |
ea8f50f8 ZJS |
2380 | _cleanup_free_ char *t = NULL; |
2381 | ||
41733ae1 | 2382 | (void) sockaddr_pretty(&p->peer.sa, p->peer_salen, true, false, &t); |
ea8f50f8 | 2383 | |
166cf510 | 2384 | log_unit_warning(UNIT(s), |
ea8f50f8 ZJS |
2385 | "Too many incoming connections (%u) from source %s, dropping connection.", |
2386 | p->n_ref, strnull(t)); | |
a98f7575 | 2387 | goto refuse; |
9d565427 SS |
2388 | } |
2389 | } | |
2390 | ||
b669c20f | 2391 | r = socket_load_service_unit(s, cfd, &service); |
86e045ec | 2392 | if (ERRNO_IS_DISCONNECT(r)) |
5cf09553 | 2393 | return; |
e55001eb | 2394 | if (r < 0) |
4f2d528d | 2395 | goto fail; |
b15bdda8 | 2396 | |
b669c20f ZJS |
2397 | r = unit_add_two_dependencies(UNIT(s), UNIT_BEFORE, UNIT_TRIGGERS, service, |
2398 | false, UNIT_DEPENDENCY_IMPLICIT); | |
2399 | if (r < 0) | |
2400 | goto fail; | |
6c073082 | 2401 | |
e4f67317 | 2402 | s->n_accepted++; |
b15bdda8 | 2403 | |
b669c20f | 2404 | r = service_set_socket_fd(SERVICE(service), cfd, s, s->selinux_context_from_net); |
86e045ec | 2405 | if (ERRNO_IS_DISCONNECT(r)) |
5cf09553 | 2406 | return; |
1a710b43 | 2407 | if (r < 0) |
4f2d528d LP |
2408 | goto fail; |
2409 | ||
934ef6a5 | 2410 | TAKE_FD(cfd); /* We passed ownership of the fd to the service now. Forget it here. */ |
313cefa1 | 2411 | s->n_connections++; |
6cf6bbc2 | 2412 | |
b669c20f | 2413 | SERVICE(service)->peer = TAKE_PTR(p); /* Pass ownership of the peer reference */ |
9d565427 | 2414 | |
b669c20f | 2415 | r = manager_add_job(UNIT(s)->manager, JOB_START, service, JOB_REPLACE, NULL, &error, NULL); |
3e7a1f50 | 2416 | if (r < 0) { |
934ef6a5 ZJS |
2417 | /* We failed to activate the new service, but it still exists. Let's make sure the |
2418 | * service closes and forgets the connection fd again, immediately. */ | |
b669c20f | 2419 | service_close_socket_fd(SERVICE(service)); |
4f2d528d | 2420 | goto fail; |
3e7a1f50 | 2421 | } |
c4e2ceae LP |
2422 | |
2423 | /* Notify clients about changed counters */ | |
2424 | unit_add_to_dbus_queue(UNIT(s)); | |
4f2d528d | 2425 | } |
034c6ed7 | 2426 | |
5cf09553 | 2427 | TAKE_FD(cfd); |
034c6ed7 LP |
2428 | return; |
2429 | ||
a98f7575 MM |
2430 | refuse: |
2431 | s->n_refused++; | |
a98f7575 MM |
2432 | return; |
2433 | ||
034c6ed7 | 2434 | fail: |
86e045ec ZJS |
2435 | if (ERRNO_IS_RESOURCE(r)) |
2436 | log_unit_warning(UNIT(s), "Failed to queue service startup job: %s", | |
2437 | bus_error_message(&error, r)); | |
2438 | else | |
2439 | log_unit_warning(UNIT(s), "Failed to queue service startup job (Maybe the service file is missing or not a %s unit?): %s", | |
2440 | cfd >= 0 ? "template" : "non-template", | |
2441 | bus_error_message(&error, r)); | |
e821075a | 2442 | |
60089004 | 2443 | socket_enter_stop_pre(s, SOCKET_FAILURE_RESOURCES); |
034c6ed7 LP |
2444 | } |
2445 | ||
cfc4eb4c | 2446 | static void socket_run_next(Socket *s) { |
034c6ed7 LP |
2447 | int r; |
2448 | ||
2449 | assert(s); | |
2450 | assert(s->control_command); | |
2451 | assert(s->control_command->command_next); | |
2452 | ||
5e94833f LP |
2453 | socket_unwatch_control_pid(s); |
2454 | ||
034c6ed7 LP |
2455 | s->control_command = s->control_command->command_next; |
2456 | ||
e821075a LP |
2457 | r = socket_spawn(s, s->control_command, &s->control_pid); |
2458 | if (r < 0) | |
034c6ed7 LP |
2459 | goto fail; |
2460 | ||
2461 | return; | |
2462 | ||
2463 | fail: | |
f2341e0a | 2464 | log_unit_warning_errno(UNIT(s), r, "Failed to run next task: %m"); |
80876c20 LP |
2465 | |
2466 | if (s->state == SOCKET_START_POST) | |
cfc4eb4c | 2467 | socket_enter_stop_pre(s, SOCKET_FAILURE_RESOURCES); |
034c6ed7 | 2468 | else if (s->state == SOCKET_STOP_POST) |
cfc4eb4c | 2469 | socket_enter_dead(s, SOCKET_FAILURE_RESOURCES); |
034c6ed7 | 2470 | else |
cfc4eb4c | 2471 | socket_enter_signal(s, SOCKET_FINAL_SIGTERM, SOCKET_FAILURE_RESOURCES); |
034c6ed7 LP |
2472 | } |
2473 | ||
87f0e418 LP |
2474 | static int socket_start(Unit *u) { |
2475 | Socket *s = SOCKET(u); | |
07299350 | 2476 | int r; |
83c60c9f LP |
2477 | |
2478 | assert(s); | |
2479 | ||
034c6ed7 LP |
2480 | /* We cannot fulfill this request right now, try again later |
2481 | * please! */ | |
3900e5fd LP |
2482 | if (IN_SET(s->state, |
2483 | SOCKET_STOP_PRE, | |
2484 | SOCKET_STOP_PRE_SIGKILL, | |
2485 | SOCKET_STOP_PRE_SIGTERM, | |
2486 | SOCKET_STOP_POST, | |
2487 | SOCKET_FINAL_SIGTERM, | |
c968d76a YW |
2488 | SOCKET_FINAL_SIGKILL, |
2489 | SOCKET_CLEANING)) | |
034c6ed7 LP |
2490 | return -EAGAIN; |
2491 | ||
a4152e3f | 2492 | /* Already on it! */ |
3900e5fd LP |
2493 | if (IN_SET(s->state, |
2494 | SOCKET_START_PRE, | |
2495 | SOCKET_START_CHOWN, | |
2496 | SOCKET_START_POST)) | |
034c6ed7 | 2497 | return 0; |
83c60c9f | 2498 | |
034c6ed7 | 2499 | /* Cannot run this without the service being around */ |
9444b1f2 | 2500 | if (UNIT_ISSET(s->service)) { |
57020a3a LP |
2501 | Service *service; |
2502 | ||
2503 | service = SERVICE(UNIT_DEREF(s->service)); | |
2504 | ||
d85ff944 YW |
2505 | if (UNIT(service)->load_state != UNIT_LOADED) |
2506 | return log_unit_error_errno(u, SYNTHETIC_ERRNO(ENOENT), "Socket service %s not loaded, refusing.", UNIT(service)->id); | |
4f2d528d | 2507 | |
35b8ca3a | 2508 | /* If the service is already active we cannot start the |
4f2d528d | 2509 | * socket */ |
d85ff944 YW |
2510 | if (!IN_SET(service->state, SERVICE_DEAD, SERVICE_FAILED, SERVICE_AUTO_RESTART)) |
2511 | return log_unit_error_errno(u, SYNTHETIC_ERRNO(EBUSY), "Socket service %s already active, refusing.", UNIT(service)->id); | |
4f2d528d | 2512 | } |
e537352b | 2513 | |
3742095b | 2514 | assert(IN_SET(s->state, SOCKET_DEAD, SOCKET_FAILED)); |
83c60c9f | 2515 | |
97a3f4ee | 2516 | r = unit_test_start_limit(u); |
07299350 LP |
2517 | if (r < 0) { |
2518 | socket_enter_dead(s, SOCKET_FAILURE_START_LIMIT_HIT); | |
2519 | return r; | |
2520 | } | |
2521 | ||
4b58153d LP |
2522 | r = unit_acquire_invocation_id(u); |
2523 | if (r < 0) | |
2524 | return r; | |
2525 | ||
cfc4eb4c | 2526 | s->result = SOCKET_SUCCESS; |
6a1d4d9f | 2527 | exec_command_reset_status_list_array(s->exec_command, _SOCKET_EXEC_COMMAND_MAX); |
3c7416b6 LP |
2528 | |
2529 | u->reset_accounting = true; | |
5ad096b3 | 2530 | |
034c6ed7 | 2531 | socket_enter_start_pre(s); |
82a2b6bb | 2532 | return 1; |
034c6ed7 | 2533 | } |
83c60c9f | 2534 | |
87f0e418 LP |
2535 | static int socket_stop(Unit *u) { |
2536 | Socket *s = SOCKET(u); | |
034c6ed7 LP |
2537 | |
2538 | assert(s); | |
2539 | ||
e537352b | 2540 | /* Already on it */ |
3900e5fd LP |
2541 | if (IN_SET(s->state, |
2542 | SOCKET_STOP_PRE, | |
2543 | SOCKET_STOP_PRE_SIGTERM, | |
2544 | SOCKET_STOP_PRE_SIGKILL, | |
2545 | SOCKET_STOP_POST, | |
2546 | SOCKET_FINAL_SIGTERM, | |
2547 | SOCKET_FINAL_SIGKILL)) | |
e537352b LP |
2548 | return 0; |
2549 | ||
3f6c78dc LP |
2550 | /* If there's already something running we go directly into |
2551 | * kill mode. */ | |
3900e5fd LP |
2552 | if (IN_SET(s->state, |
2553 | SOCKET_START_PRE, | |
2554 | SOCKET_START_CHOWN, | |
2555 | SOCKET_START_POST)) { | |
cfc4eb4c | 2556 | socket_enter_signal(s, SOCKET_STOP_PRE_SIGTERM, SOCKET_SUCCESS); |
3f6c78dc LP |
2557 | return -EAGAIN; |
2558 | } | |
2559 | ||
c968d76a YW |
2560 | /* If we are currently cleaning, then abort it, brutally. */ |
2561 | if (s->state == SOCKET_CLEANING) { | |
2562 | socket_enter_signal(s, SOCKET_FINAL_SIGKILL, SOCKET_SUCCESS); | |
2563 | return 0; | |
2564 | } | |
2565 | ||
3742095b | 2566 | assert(IN_SET(s->state, SOCKET_LISTENING, SOCKET_RUNNING)); |
83c60c9f | 2567 | |
cfc4eb4c | 2568 | socket_enter_stop_pre(s, SOCKET_SUCCESS); |
82a2b6bb | 2569 | return 1; |
542563ba LP |
2570 | } |
2571 | ||
a16e1123 LP |
2572 | static int socket_serialize(Unit *u, FILE *f, FDSet *fds) { |
2573 | Socket *s = SOCKET(u); | |
2574 | SocketPort *p; | |
2575 | int r; | |
2576 | ||
2577 | assert(u); | |
2578 | assert(f); | |
2579 | assert(fds); | |
2580 | ||
d68c645b LP |
2581 | (void) serialize_item(f, "state", socket_state_to_string(s->state)); |
2582 | (void) serialize_item(f, "result", socket_result_to_string(s->result)); | |
2583 | (void) serialize_item_format(f, "n-accepted", "%u", s->n_accepted); | |
2584 | (void) serialize_item_format(f, "n-refused", "%u", s->n_refused); | |
a16e1123 LP |
2585 | |
2586 | if (s->control_pid > 0) | |
d68c645b | 2587 | (void) serialize_item_format(f, "control-pid", PID_FMT, s->control_pid); |
a16e1123 LP |
2588 | |
2589 | if (s->control_command_id >= 0) | |
d68c645b | 2590 | (void) serialize_item(f, "control-command", socket_exec_command_to_string(s->control_command_id)); |
a16e1123 LP |
2591 | |
2592 | LIST_FOREACH(port, p, s->ports) { | |
2593 | int copy; | |
2594 | ||
2595 | if (p->fd < 0) | |
2596 | continue; | |
2597 | ||
613b411c LP |
2598 | copy = fdset_put_dup(fds, p->fd); |
2599 | if (copy < 0) | |
fc2d74ab | 2600 | return log_unit_warning_errno(u, copy, "Failed to serialize socket fd: %m"); |
a16e1123 LP |
2601 | |
2602 | if (p->type == SOCKET_SOCKET) { | |
613b411c | 2603 | _cleanup_free_ char *t = NULL; |
a16e1123 | 2604 | |
ee092817 LP |
2605 | r = socket_address_print(&p->address, &t); |
2606 | if (r < 0) | |
fc2d74ab | 2607 | return log_unit_error_errno(u, r, "Failed to format socket address: %m"); |
a16e1123 | 2608 | |
7a22745a | 2609 | if (socket_address_family(&p->address) == AF_NETLINK) |
d68c645b | 2610 | (void) serialize_item_format(f, "netlink", "%i %s", copy, t); |
7a22745a | 2611 | else |
d68c645b | 2612 | (void) serialize_item_format(f, "socket", "%i %i %s", copy, p->address.type, t); |
b0a3f2bc | 2613 | } else if (p->type == SOCKET_SPECIAL) |
d68c645b | 2614 | (void) serialize_item_format(f, "special", "%i %s", copy, p->path); |
ee092817 | 2615 | else if (p->type == SOCKET_MQUEUE) |
d68c645b | 2616 | (void) serialize_item_format(f, "mqueue", "%i %s", copy, p->path); |
60252446 | 2617 | else if (p->type == SOCKET_USB_FUNCTION) |
d68c645b | 2618 | (void) serialize_item_format(f, "ffs", "%i %s", copy, p->path); |
b0a3f2bc | 2619 | else { |
a16e1123 | 2620 | assert(p->type == SOCKET_FIFO); |
d68c645b | 2621 | (void) serialize_item_format(f, "fifo", "%i %s", copy, p->path); |
a16e1123 LP |
2622 | } |
2623 | } | |
2624 | ||
2625 | return 0; | |
2626 | } | |
2627 | ||
2628 | static int socket_deserialize_item(Unit *u, const char *key, const char *value, FDSet *fds) { | |
2629 | Socket *s = SOCKET(u); | |
a16e1123 LP |
2630 | |
2631 | assert(u); | |
2632 | assert(key); | |
2633 | assert(value); | |
a16e1123 LP |
2634 | |
2635 | if (streq(key, "state")) { | |
2636 | SocketState state; | |
2637 | ||
ee092817 LP |
2638 | state = socket_state_from_string(value); |
2639 | if (state < 0) | |
f2341e0a | 2640 | log_unit_debug(u, "Failed to parse state value: %s", value); |
a16e1123 LP |
2641 | else |
2642 | s->deserialized_state = state; | |
cfc4eb4c LP |
2643 | } else if (streq(key, "result")) { |
2644 | SocketResult f; | |
a16e1123 | 2645 | |
cfc4eb4c LP |
2646 | f = socket_result_from_string(value); |
2647 | if (f < 0) | |
f2341e0a | 2648 | log_unit_debug(u, "Failed to parse result value: %s", value); |
cfc4eb4c LP |
2649 | else if (f != SOCKET_SUCCESS) |
2650 | s->result = f; | |
a16e1123 LP |
2651 | |
2652 | } else if (streq(key, "n-accepted")) { | |
2653 | unsigned k; | |
2654 | ||
e364ad06 | 2655 | if (safe_atou(value, &k) < 0) |
f2341e0a | 2656 | log_unit_debug(u, "Failed to parse n-accepted value: %s", value); |
a16e1123 LP |
2657 | else |
2658 | s->n_accepted += k; | |
a98f7575 MM |
2659 | } else if (streq(key, "n-refused")) { |
2660 | unsigned k; | |
2661 | ||
2662 | if (safe_atou(value, &k) < 0) | |
2663 | log_unit_debug(u, "Failed to parse n-refused value: %s", value); | |
2664 | else | |
2665 | s->n_refused += k; | |
a16e1123 | 2666 | } else if (streq(key, "control-pid")) { |
5925dd3c | 2667 | pid_t pid; |
a16e1123 | 2668 | |
e364ad06 | 2669 | if (parse_pid(value, &pid) < 0) |
f2341e0a | 2670 | log_unit_debug(u, "Failed to parse control-pid value: %s", value); |
a16e1123 | 2671 | else |
5925dd3c | 2672 | s->control_pid = pid; |
a16e1123 LP |
2673 | } else if (streq(key, "control-command")) { |
2674 | SocketExecCommand id; | |
2675 | ||
66870f90 ZJS |
2676 | id = socket_exec_command_from_string(value); |
2677 | if (id < 0) | |
f2341e0a | 2678 | log_unit_debug(u, "Failed to parse exec-command value: %s", value); |
a16e1123 LP |
2679 | else { |
2680 | s->control_command_id = id; | |
2681 | s->control_command = s->exec_command[id]; | |
2682 | } | |
2683 | } else if (streq(key, "fifo")) { | |
2684 | int fd, skip = 0; | |
2685 | SocketPort *p; | |
2686 | ||
2687 | if (sscanf(value, "%i %n", &fd, &skip) < 1 || fd < 0 || !fdset_contains(fds, fd)) | |
f2341e0a | 2688 | log_unit_debug(u, "Failed to parse fifo value: %s", value); |
3da0caf5 YW |
2689 | else { |
2690 | bool found = false; | |
2691 | ||
a16e1123 | 2692 | LIST_FOREACH(port, p, s->ports) |
3da0caf5 YW |
2693 | if (p->fd < 0 && |
2694 | p->type == SOCKET_FIFO && | |
e3f791a2 | 2695 | path_equal_or_files_same(p->path, value+skip, 0)) { |
3da0caf5 YW |
2696 | p->fd = fdset_remove(fds, fd); |
2697 | found = true; | |
b0a3f2bc | 2698 | break; |
80a58668 | 2699 | } |
3da0caf5 YW |
2700 | if (!found) |
2701 | log_unit_debug(u, "No matching fifo socket found: %s", value+skip); | |
2702 | } | |
b0a3f2bc LP |
2703 | |
2704 | } else if (streq(key, "special")) { | |
2705 | int fd, skip = 0; | |
2706 | SocketPort *p; | |
2707 | ||
2708 | if (sscanf(value, "%i %n", &fd, &skip) < 1 || fd < 0 || !fdset_contains(fds, fd)) | |
f2341e0a | 2709 | log_unit_debug(u, "Failed to parse special value: %s", value); |
3da0caf5 YW |
2710 | else { |
2711 | bool found = false; | |
2712 | ||
b0a3f2bc | 2713 | LIST_FOREACH(port, p, s->ports) |
3da0caf5 YW |
2714 | if (p->fd < 0 && |
2715 | p->type == SOCKET_SPECIAL && | |
e3f791a2 | 2716 | path_equal_or_files_same(p->path, value+skip, 0)) { |
3da0caf5 YW |
2717 | p->fd = fdset_remove(fds, fd); |
2718 | found = true; | |
a16e1123 | 2719 | break; |
80a58668 | 2720 | } |
3da0caf5 YW |
2721 | if (!found) |
2722 | log_unit_debug(u, "No matching special socket found: %s", value+skip); | |
2723 | } | |
a16e1123 | 2724 | |
ee092817 LP |
2725 | } else if (streq(key, "mqueue")) { |
2726 | int fd, skip = 0; | |
2727 | SocketPort *p; | |
2728 | ||
2729 | if (sscanf(value, "%i %n", &fd, &skip) < 1 || fd < 0 || !fdset_contains(fds, fd)) | |
f2341e0a | 2730 | log_unit_debug(u, "Failed to parse mqueue value: %s", value); |
3da0caf5 YW |
2731 | else { |
2732 | bool found = false; | |
2733 | ||
ee092817 | 2734 | LIST_FOREACH(port, p, s->ports) |
3da0caf5 YW |
2735 | if (p->fd < 0 && |
2736 | p->type == SOCKET_MQUEUE && | |
80a58668 | 2737 | streq(p->path, value+skip)) { |
3da0caf5 YW |
2738 | p->fd = fdset_remove(fds, fd); |
2739 | found = true; | |
ee092817 | 2740 | break; |
80a58668 | 2741 | } |
3da0caf5 YW |
2742 | if (!found) |
2743 | log_unit_debug(u, "No matching mqueue socket found: %s", value+skip); | |
2744 | } | |
ee092817 | 2745 | |
a16e1123 | 2746 | } else if (streq(key, "socket")) { |
27ca8d7a | 2747 | int fd, type, skip = 0; |
a16e1123 LP |
2748 | SocketPort *p; |
2749 | ||
27ca8d7a | 2750 | if (sscanf(value, "%i %i %n", &fd, &type, &skip) < 2 || fd < 0 || type < 0 || !fdset_contains(fds, fd)) |
f2341e0a | 2751 | log_unit_debug(u, "Failed to parse socket value: %s", value); |
3da0caf5 YW |
2752 | else { |
2753 | bool found = false; | |
2754 | ||
a16e1123 | 2755 | LIST_FOREACH(port, p, s->ports) |
3da0caf5 YW |
2756 | if (p->fd < 0 && |
2757 | socket_address_is(&p->address, value+skip, type)) { | |
2758 | p->fd = fdset_remove(fds, fd); | |
2759 | found = true; | |
a16e1123 | 2760 | break; |
80a58668 | 2761 | } |
3da0caf5 YW |
2762 | if (!found) |
2763 | log_unit_debug(u, "No matching %s socket found: %s", | |
2764 | socket_address_type_to_string(type), value+skip); | |
2765 | } | |
a16e1123 | 2766 | |
7a22745a LP |
2767 | } else if (streq(key, "netlink")) { |
2768 | int fd, skip = 0; | |
2769 | SocketPort *p; | |
2770 | ||
2771 | if (sscanf(value, "%i %n", &fd, &skip) < 1 || fd < 0 || !fdset_contains(fds, fd)) | |
f2341e0a | 2772 | log_unit_debug(u, "Failed to parse socket value: %s", value); |
3da0caf5 YW |
2773 | else { |
2774 | bool found = false; | |
2775 | ||
7a22745a | 2776 | LIST_FOREACH(port, p, s->ports) |
3da0caf5 YW |
2777 | if (p->fd < 0 && |
2778 | socket_address_is_netlink(&p->address, value+skip)) { | |
2779 | p->fd = fdset_remove(fds, fd); | |
2780 | found = true; | |
7a22745a | 2781 | break; |
80a58668 | 2782 | } |
3da0caf5 YW |
2783 | if (!found) |
2784 | log_unit_debug(u, "No matching netlink socket found: %s", value+skip); | |
2785 | } | |
60252446 PS |
2786 | |
2787 | } else if (streq(key, "ffs")) { | |
2788 | int fd, skip = 0; | |
2789 | SocketPort *p; | |
2790 | ||
2791 | if (sscanf(value, "%i %n", &fd, &skip) < 1 || fd < 0 || !fdset_contains(fds, fd)) | |
2792 | log_unit_debug(u, "Failed to parse ffs value: %s", value); | |
3da0caf5 YW |
2793 | else { |
2794 | bool found = false; | |
2795 | ||
60252446 | 2796 | LIST_FOREACH(port, p, s->ports) |
3da0caf5 YW |
2797 | if (p->fd < 0 && |
2798 | p->type == SOCKET_USB_FUNCTION && | |
e3f791a2 | 2799 | path_equal_or_files_same(p->path, value+skip, 0)) { |
3da0caf5 YW |
2800 | p->fd = fdset_remove(fds, fd); |
2801 | found = true; | |
60252446 | 2802 | break; |
80a58668 | 2803 | } |
3da0caf5 YW |
2804 | if (!found) |
2805 | log_unit_debug(u, "No matching ffs socket found: %s", value+skip); | |
2806 | } | |
60252446 | 2807 | |
a16e1123 | 2808 | } else |
f2341e0a | 2809 | log_unit_debug(UNIT(s), "Unknown serialization key: %s", key); |
a16e1123 LP |
2810 | |
2811 | return 0; | |
2812 | } | |
2813 | ||
9ff1a6f1 | 2814 | static void socket_distribute_fds(Unit *u, FDSet *fds) { |
01e10de3 LP |
2815 | Socket *s = SOCKET(u); |
2816 | SocketPort *p; | |
2817 | ||
2818 | assert(u); | |
2819 | ||
2820 | LIST_FOREACH(port, p, s->ports) { | |
01e10de3 LP |
2821 | int fd; |
2822 | ||
2823 | if (p->type != SOCKET_SOCKET) | |
2824 | continue; | |
2825 | ||
2826 | if (p->fd >= 0) | |
2827 | continue; | |
2828 | ||
90e74a66 | 2829 | FDSET_FOREACH(fd, fds) { |
01e10de3 LP |
2830 | if (socket_address_matches_fd(&p->address, fd)) { |
2831 | p->fd = fdset_remove(fds, fd); | |
2832 | s->deserialized_state = SOCKET_LISTENING; | |
2833 | break; | |
2834 | } | |
2835 | } | |
2836 | } | |
01e10de3 LP |
2837 | } |
2838 | ||
44a6b1b6 | 2839 | _pure_ static UnitActiveState socket_active_state(Unit *u) { |
87f0e418 | 2840 | assert(u); |
5cb5a6ff | 2841 | |
acbb0225 | 2842 | return state_translation_table[SOCKET(u)->state]; |
5cb5a6ff LP |
2843 | } |
2844 | ||
44a6b1b6 | 2845 | _pure_ static const char *socket_sub_state_to_string(Unit *u) { |
10a94420 LP |
2846 | assert(u); |
2847 | ||
a16e1123 | 2848 | return socket_state_to_string(SOCKET(u)->state); |
10a94420 LP |
2849 | } |
2850 | ||
67419600 OS |
2851 | const char* socket_port_type_to_string(SocketPort *p) { |
2852 | ||
2853 | assert(p); | |
2854 | ||
2855 | switch (p->type) { | |
718db961 LP |
2856 | |
2857 | case SOCKET_SOCKET: | |
2858 | ||
2859 | switch (p->address.type) { | |
2860 | ||
2861 | case SOCK_STREAM: | |
2862 | return "Stream"; | |
2863 | ||
2864 | case SOCK_DGRAM: | |
2865 | return "Datagram"; | |
2866 | ||
2867 | case SOCK_SEQPACKET: | |
2868 | return "SequentialPacket"; | |
2869 | ||
2870 | case SOCK_RAW: | |
2871 | if (socket_address_family(&p->address) == AF_NETLINK) | |
2872 | return "Netlink"; | |
2873 | ||
4831981d | 2874 | _fallthrough_; |
718db961 LP |
2875 | default: |
2876 | return NULL; | |
2877 | } | |
2878 | ||
2879 | case SOCKET_SPECIAL: | |
2880 | return "Special"; | |
2881 | ||
2882 | case SOCKET_MQUEUE: | |
2883 | return "MessageQueue"; | |
2884 | ||
2885 | case SOCKET_FIFO: | |
2886 | return "FIFO"; | |
2887 | ||
60252446 PS |
2888 | case SOCKET_USB_FUNCTION: |
2889 | return "USBFunction"; | |
2890 | ||
718db961 LP |
2891 | default: |
2892 | return NULL; | |
67419600 OS |
2893 | } |
2894 | } | |
2895 | ||
038ed5a4 YW |
2896 | SocketType socket_port_type_from_string(const char *s) { |
2897 | assert(s); | |
2898 | ||
e045e325 YW |
2899 | if (STR_IN_SET(s, "Stream", "Datagram", "SequentialPacket", "Netlink")) |
2900 | return SOCKET_SOCKET; | |
2901 | else if (streq(s, "Special")) | |
2902 | return SOCKET_SPECIAL; | |
2903 | else if (streq(s, "MessageQueue")) | |
2904 | return SOCKET_MQUEUE; | |
2905 | else if (streq(s, "FIFO")) | |
2906 | return SOCKET_FIFO; | |
2907 | else if (streq(s, "USBFunction")) | |
2908 | return SOCKET_USB_FUNCTION; | |
038ed5a4 YW |
2909 | else |
2910 | return _SOCKET_TYPE_INVALID; | |
2911 | } | |
2912 | ||
f2f725e5 | 2913 | _pure_ static bool socket_may_gc(Unit *u) { |
6cf6bbc2 LP |
2914 | Socket *s = SOCKET(u); |
2915 | ||
2916 | assert(u); | |
2917 | ||
f2f725e5 | 2918 | return s->n_connections == 0; |
6cf6bbc2 LP |
2919 | } |
2920 | ||
a79279c7 LP |
2921 | static int socket_accept_do(Socket *s, int fd) { |
2922 | int cfd; | |
2923 | ||
2924 | assert(s); | |
2925 | assert(fd >= 0); | |
2926 | ||
4ff9bc2e LP |
2927 | cfd = accept4(fd, NULL, NULL, SOCK_NONBLOCK|SOCK_CLOEXEC); |
2928 | if (cfd < 0) | |
2929 | /* Convert transient network errors into clean and well-defined EAGAIN */ | |
2930 | return ERRNO_IS_ACCEPT_AGAIN(errno) ? -EAGAIN : -errno; | |
a79279c7 LP |
2931 | |
2932 | return cfd; | |
2933 | } | |
2934 | ||
2935 | static int socket_accept_in_cgroup(Socket *s, SocketPort *p, int fd) { | |
2936 | _cleanup_close_pair_ int pair[2] = { -1, -1 }; | |
2937 | int cfd, r; | |
2938 | pid_t pid; | |
2939 | ||
2940 | assert(s); | |
2941 | assert(p); | |
2942 | assert(fd >= 0); | |
2943 | ||
5238e957 | 2944 | /* Similar to socket_address_listen_in_cgroup(), but for accept() rather than socket(): make sure that any |
a79279c7 LP |
2945 | * connection socket is also properly associated with the cgroup. */ |
2946 | ||
2947 | if (!IN_SET(p->address.sockaddr.sa.sa_family, AF_INET, AF_INET6)) | |
2948 | goto shortcut; | |
2949 | ||
2950 | r = bpf_firewall_supported(); | |
2951 | if (r < 0) | |
2952 | return r; | |
2ae7ee58 | 2953 | if (r == BPF_FIREWALL_UNSUPPORTED) |
a79279c7 LP |
2954 | goto shortcut; |
2955 | ||
2956 | if (socketpair(AF_UNIX, SOCK_SEQPACKET|SOCK_CLOEXEC, 0, pair) < 0) | |
2957 | return log_unit_error_errno(UNIT(s), errno, "Failed to create communication channel: %m"); | |
2958 | ||
4c253ed1 | 2959 | r = unit_fork_helper_process(UNIT(s), "(sd-accept)", &pid); |
a79279c7 LP |
2960 | if (r < 0) |
2961 | return log_unit_error_errno(UNIT(s), r, "Failed to fork off accept stub process: %m"); | |
2962 | if (r == 0) { | |
2963 | /* Child */ | |
2964 | ||
2965 | pair[0] = safe_close(pair[0]); | |
2966 | ||
2967 | cfd = socket_accept_do(s, fd); | |
4ff9bc2e LP |
2968 | if (cfd == -EAGAIN) /* spurious accept() */ |
2969 | _exit(EXIT_SUCCESS); | |
a79279c7 LP |
2970 | if (cfd < 0) { |
2971 | log_unit_error_errno(UNIT(s), cfd, "Failed to accept connection socket: %m"); | |
2972 | _exit(EXIT_FAILURE); | |
2973 | } | |
2974 | ||
2975 | r = send_one_fd(pair[1], cfd, 0); | |
2976 | if (r < 0) { | |
2977 | log_unit_error_errno(UNIT(s), r, "Failed to send connection socket to parent: %m"); | |
2978 | _exit(EXIT_FAILURE); | |
2979 | } | |
2980 | ||
2981 | _exit(EXIT_SUCCESS); | |
2982 | } | |
2983 | ||
2984 | pair[1] = safe_close(pair[1]); | |
2985 | cfd = receive_one_fd(pair[0], 0); | |
2986 | ||
2987 | /* We synchronously wait for the helper, as it shouldn't be slow */ | |
d2e0ac3d | 2988 | r = wait_for_terminate_and_check("(sd-accept)", pid, WAIT_LOG_ABNORMAL); |
a79279c7 LP |
2989 | if (r < 0) { |
2990 | safe_close(cfd); | |
2991 | return r; | |
2992 | } | |
2993 | ||
4ff9bc2e LP |
2994 | /* If we received no fd, we got EIO here. If this happens with a process exit code of EXIT_SUCCESS |
2995 | * this is a spurious accept(), let's convert that back to EAGAIN here. */ | |
2996 | if (cfd == -EIO) | |
2997 | return -EAGAIN; | |
a79279c7 LP |
2998 | if (cfd < 0) |
2999 | return log_unit_error_errno(UNIT(s), cfd, "Failed to receive connection socket: %m"); | |
3000 | ||
3001 | return cfd; | |
3002 | ||
3003 | shortcut: | |
3004 | cfd = socket_accept_do(s, fd); | |
4ff9bc2e LP |
3005 | if (cfd == -EAGAIN) /* spurious accept(), skip it silently */ |
3006 | return -EAGAIN; | |
a79279c7 LP |
3007 | if (cfd < 0) |
3008 | return log_unit_error_errno(UNIT(s), cfd, "Failed to accept connection socket: %m"); | |
3009 | ||
3010 | return cfd; | |
3011 | } | |
3012 | ||
718db961 LP |
3013 | static int socket_dispatch_io(sd_event_source *source, int fd, uint32_t revents, void *userdata) { |
3014 | SocketPort *p = userdata; | |
4f2d528d | 3015 | int cfd = -1; |
9152c765 | 3016 | |
718db961 | 3017 | assert(p); |
8d567588 | 3018 | assert(fd >= 0); |
9152c765 | 3019 | |
718db961 LP |
3020 | if (p->socket->state != SOCKET_LISTENING) |
3021 | return 0; | |
871d7de4 | 3022 | |
f2341e0a | 3023 | log_unit_debug(UNIT(p->socket), "Incoming traffic"); |
9152c765 | 3024 | |
718db961 | 3025 | if (revents != EPOLLIN) { |
718db961 | 3026 | if (revents & EPOLLHUP) |
f2341e0a | 3027 | log_unit_error(UNIT(p->socket), "Got POLLHUP on a listening socket. The service probably invoked shutdown() on it, and should better not do that."); |
641e01dc | 3028 | else |
f2341e0a | 3029 | log_unit_error(UNIT(p->socket), "Got unexpected poll event (0x%x) on socket.", revents); |
8d567588 | 3030 | goto fail; |
4f2d528d LP |
3031 | } |
3032 | ||
718db961 LP |
3033 | if (p->socket->accept && |
3034 | p->type == SOCKET_SOCKET && | |
3035 | socket_address_can_accept(&p->address)) { | |
3036 | ||
a79279c7 | 3037 | cfd = socket_accept_in_cgroup(p->socket, p, fd); |
4ff9bc2e LP |
3038 | if (cfd == -EAGAIN) /* Spurious accept() */ |
3039 | return 0; | |
a79279c7 LP |
3040 | if (cfd < 0) |
3041 | goto fail; | |
4fd5948e | 3042 | |
5d0fe423 | 3043 | socket_apply_socket_options(p->socket, p, cfd); |
4f2d528d | 3044 | } |
9152c765 | 3045 | |
718db961 LP |
3046 | socket_enter_running(p->socket, cfd); |
3047 | return 0; | |
8d567588 LP |
3048 | |
3049 | fail: | |
718db961 LP |
3050 | socket_enter_stop_pre(p->socket, SOCKET_FAILURE_RESOURCES); |
3051 | return 0; | |
9152c765 LP |
3052 | } |
3053 | ||
87f0e418 LP |
3054 | static void socket_sigchld_event(Unit *u, pid_t pid, int code, int status) { |
3055 | Socket *s = SOCKET(u); | |
cfc4eb4c | 3056 | SocketResult f; |
5cb5a6ff LP |
3057 | |
3058 | assert(s); | |
034c6ed7 | 3059 | assert(pid >= 0); |
5cb5a6ff | 3060 | |
8c47c732 LP |
3061 | if (pid != s->control_pid) |
3062 | return; | |
542563ba | 3063 | |
034c6ed7 LP |
3064 | s->control_pid = 0; |
3065 | ||
1f0958f6 | 3066 | if (is_clean_exit(code, status, EXIT_CLEAN_COMMAND, NULL)) |
cfc4eb4c LP |
3067 | f = SOCKET_SUCCESS; |
3068 | else if (code == CLD_EXITED) | |
3069 | f = SOCKET_FAILURE_EXIT_CODE; | |
3070 | else if (code == CLD_KILLED) | |
3071 | f = SOCKET_FAILURE_SIGNAL; | |
3072 | else if (code == CLD_DUMPED) | |
3073 | f = SOCKET_FAILURE_CORE_DUMP; | |
3074 | else | |
a4152e3f | 3075 | assert_not_reached("Unknown sigchld code"); |
8c47c732 | 3076 | |
b708e7ce | 3077 | if (s->control_command) { |
6ea832a2 | 3078 | exec_status_exit(&s->control_command->exec_status, &s->exec_context, pid, code, status); |
a16e1123 | 3079 | |
3ed0cd26 | 3080 | if (s->control_command->flags & EXEC_COMMAND_IGNORE_FAILURE) |
cfc4eb4c | 3081 | f = SOCKET_SUCCESS; |
b708e7ce LP |
3082 | } |
3083 | ||
91bbd9b7 | 3084 | unit_log_process_exit( |
5cc2cd1c | 3085 | u, |
91bbd9b7 LP |
3086 | "Control process", |
3087 | socket_exec_command_to_string(s->control_command_id), | |
5cc2cd1c | 3088 | f == SOCKET_SUCCESS, |
91bbd9b7 | 3089 | code, status); |
034c6ed7 | 3090 | |
a0fef983 | 3091 | if (s->result == SOCKET_SUCCESS) |
cfc4eb4c LP |
3092 | s->result = f; |
3093 | ||
3094 | if (s->control_command && | |
3095 | s->control_command->command_next && | |
3096 | f == SOCKET_SUCCESS) { | |
3097 | ||
f2341e0a | 3098 | log_unit_debug(u, "Running next command for state %s", socket_state_to_string(s->state)); |
cfc4eb4c | 3099 | socket_run_next(s); |
acbb0225 | 3100 | } else { |
a16e1123 LP |
3101 | s->control_command = NULL; |
3102 | s->control_command_id = _SOCKET_EXEC_COMMAND_INVALID; | |
3103 | ||
034c6ed7 LP |
3104 | /* No further commands for this step, so let's figure |
3105 | * out what to do next */ | |
5cb5a6ff | 3106 | |
f2341e0a | 3107 | log_unit_debug(u, "Got final SIGCHLD for state %s", socket_state_to_string(s->state)); |
acbb0225 | 3108 | |
034c6ed7 LP |
3109 | switch (s->state) { |
3110 | ||
3111 | case SOCKET_START_PRE: | |
cfc4eb4c | 3112 | if (f == SOCKET_SUCCESS) |
3900e5fd | 3113 | socket_enter_start_chown(s); |
034c6ed7 | 3114 | else |
cfc4eb4c | 3115 | socket_enter_signal(s, SOCKET_FINAL_SIGTERM, f); |
034c6ed7 LP |
3116 | break; |
3117 | ||
3900e5fd LP |
3118 | case SOCKET_START_CHOWN: |
3119 | if (f == SOCKET_SUCCESS) | |
3120 | socket_enter_start_post(s); | |
3121 | else | |
3122 | socket_enter_stop_pre(s, f); | |
3123 | break; | |
3124 | ||
034c6ed7 | 3125 | case SOCKET_START_POST: |
cfc4eb4c | 3126 | if (f == SOCKET_SUCCESS) |
e9af15c3 | 3127 | socket_enter_listening(s); |
034c6ed7 | 3128 | else |
cfc4eb4c | 3129 | socket_enter_stop_pre(s, f); |
034c6ed7 LP |
3130 | break; |
3131 | ||
3132 | case SOCKET_STOP_PRE: | |
3133 | case SOCKET_STOP_PRE_SIGTERM: | |
3134 | case SOCKET_STOP_PRE_SIGKILL: | |
cfc4eb4c | 3135 | socket_enter_stop_post(s, f); |
034c6ed7 LP |
3136 | break; |
3137 | ||
3138 | case SOCKET_STOP_POST: | |
80876c20 LP |
3139 | case SOCKET_FINAL_SIGTERM: |
3140 | case SOCKET_FINAL_SIGKILL: | |
cfc4eb4c | 3141 | socket_enter_dead(s, f); |
034c6ed7 LP |
3142 | break; |
3143 | ||
c968d76a YW |
3144 | case SOCKET_CLEANING: |
3145 | ||
3146 | if (s->clean_result == SOCKET_SUCCESS) | |
3147 | s->clean_result = f; | |
3148 | ||
3149 | socket_enter_dead(s, SOCKET_SUCCESS); | |
3150 | break; | |
3151 | ||
034c6ed7 LP |
3152 | default: |
3153 | assert_not_reached("Uh, control process died at wrong time."); | |
3154 | } | |
3155 | } | |
c4e2ceae LP |
3156 | |
3157 | /* Notify clients about changed exit status */ | |
3158 | unit_add_to_dbus_queue(u); | |
034c6ed7 | 3159 | } |
5cb5a6ff | 3160 | |
718db961 LP |
3161 | static int socket_dispatch_timer(sd_event_source *source, usec_t usec, void *userdata) { |
3162 | Socket *s = SOCKET(userdata); | |
5cb5a6ff | 3163 | |
034c6ed7 | 3164 | assert(s); |
718db961 | 3165 | assert(s->timer_event_source == source); |
034c6ed7 LP |
3166 | |
3167 | switch (s->state) { | |
3168 | ||
3169 | case SOCKET_START_PRE: | |
f2341e0a | 3170 | log_unit_warning(UNIT(s), "Starting timed out. Terminating."); |
cfc4eb4c | 3171 | socket_enter_signal(s, SOCKET_FINAL_SIGTERM, SOCKET_FAILURE_TIMEOUT); |
da19d5c1 | 3172 | break; |
80876c20 | 3173 | |
3900e5fd | 3174 | case SOCKET_START_CHOWN: |
034c6ed7 | 3175 | case SOCKET_START_POST: |
f2341e0a | 3176 | log_unit_warning(UNIT(s), "Starting timed out. Stopping."); |
cfc4eb4c | 3177 | socket_enter_stop_pre(s, SOCKET_FAILURE_TIMEOUT); |
034c6ed7 LP |
3178 | break; |
3179 | ||
3180 | case SOCKET_STOP_PRE: | |
f2341e0a | 3181 | log_unit_warning(UNIT(s), "Stopping timed out. Terminating."); |
cfc4eb4c | 3182 | socket_enter_signal(s, SOCKET_STOP_PRE_SIGTERM, SOCKET_FAILURE_TIMEOUT); |
034c6ed7 LP |
3183 | break; |
3184 | ||
3185 | case SOCKET_STOP_PRE_SIGTERM: | |
4819ff03 | 3186 | if (s->kill_context.send_sigkill) { |
f2341e0a | 3187 | log_unit_warning(UNIT(s), "Stopping timed out. Killing."); |
cfc4eb4c | 3188 | socket_enter_signal(s, SOCKET_STOP_PRE_SIGKILL, SOCKET_FAILURE_TIMEOUT); |
ba035df2 | 3189 | } else { |
f2341e0a | 3190 | log_unit_warning(UNIT(s), "Stopping timed out. Skipping SIGKILL. Ignoring."); |
cfc4eb4c | 3191 | socket_enter_stop_post(s, SOCKET_FAILURE_TIMEOUT); |
ba035df2 | 3192 | } |
034c6ed7 LP |
3193 | break; |
3194 | ||
3195 | case SOCKET_STOP_PRE_SIGKILL: | |
f2341e0a | 3196 | log_unit_warning(UNIT(s), "Processes still around after SIGKILL. Ignoring."); |
cfc4eb4c | 3197 | socket_enter_stop_post(s, SOCKET_FAILURE_TIMEOUT); |
034c6ed7 LP |
3198 | break; |
3199 | ||
3200 | case SOCKET_STOP_POST: | |
f2341e0a | 3201 | log_unit_warning(UNIT(s), "Stopping timed out (2). Terminating."); |
cfc4eb4c | 3202 | socket_enter_signal(s, SOCKET_FINAL_SIGTERM, SOCKET_FAILURE_TIMEOUT); |
034c6ed7 LP |
3203 | break; |
3204 | ||
80876c20 | 3205 | case SOCKET_FINAL_SIGTERM: |
4819ff03 | 3206 | if (s->kill_context.send_sigkill) { |
f2341e0a | 3207 | log_unit_warning(UNIT(s), "Stopping timed out (2). Killing."); |
cfc4eb4c | 3208 | socket_enter_signal(s, SOCKET_FINAL_SIGKILL, SOCKET_FAILURE_TIMEOUT); |
ba035df2 | 3209 | } else { |
f2341e0a | 3210 | log_unit_warning(UNIT(s), "Stopping timed out (2). Skipping SIGKILL. Ignoring."); |
cfc4eb4c | 3211 | socket_enter_dead(s, SOCKET_FAILURE_TIMEOUT); |
ba035df2 | 3212 | } |
034c6ed7 LP |
3213 | break; |
3214 | ||
80876c20 | 3215 | case SOCKET_FINAL_SIGKILL: |
f2341e0a | 3216 | log_unit_warning(UNIT(s), "Still around after SIGKILL (2). Entering failed mode."); |
cfc4eb4c | 3217 | socket_enter_dead(s, SOCKET_FAILURE_TIMEOUT); |
034c6ed7 LP |
3218 | break; |
3219 | ||
c968d76a YW |
3220 | case SOCKET_CLEANING: |
3221 | log_unit_warning(UNIT(s), "Cleaning timed out. killing."); | |
3222 | ||
3223 | if (s->clean_result == SOCKET_SUCCESS) | |
3224 | s->clean_result = SOCKET_FAILURE_TIMEOUT; | |
3225 | ||
3226 | socket_enter_signal(s, SOCKET_FINAL_SIGKILL, 0); | |
3227 | break; | |
3228 | ||
034c6ed7 LP |
3229 | default: |
3230 | assert_not_reached("Timeout at wrong time."); | |
3231 | } | |
718db961 LP |
3232 | |
3233 | return 0; | |
5cb5a6ff LP |
3234 | } |
3235 | ||
79c7626d | 3236 | int socket_collect_fds(Socket *s, int **fds) { |
da6053d0 | 3237 | size_t k = 0, n = 0; |
44d8db9e | 3238 | SocketPort *p; |
da6053d0 | 3239 | int *rfds; |
44d8db9e LP |
3240 | |
3241 | assert(s); | |
3242 | assert(fds); | |
44d8db9e LP |
3243 | |
3244 | /* Called from the service code for requesting our fds */ | |
3245 | ||
15087cdb | 3246 | LIST_FOREACH(port, p, s->ports) { |
44d8db9e | 3247 | if (p->fd >= 0) |
79c7626d LP |
3248 | n++; |
3249 | n += p->n_auxiliary_fds; | |
15087cdb | 3250 | } |
44d8db9e | 3251 | |
79c7626d | 3252 | if (n <= 0) { |
de3756ab | 3253 | *fds = NULL; |
de3756ab LP |
3254 | return 0; |
3255 | } | |
3256 | ||
79c7626d | 3257 | rfds = new(int, n); |
e5403f09 | 3258 | if (!rfds) |
44d8db9e LP |
3259 | return -ENOMEM; |
3260 | ||
15087cdb | 3261 | LIST_FOREACH(port, p, s->ports) { |
da6053d0 | 3262 | size_t i; |
79c7626d | 3263 | |
44d8db9e LP |
3264 | if (p->fd >= 0) |
3265 | rfds[k++] = p->fd; | |
15087cdb PS |
3266 | for (i = 0; i < p->n_auxiliary_fds; ++i) |
3267 | rfds[k++] = p->auxiliary_fds[i]; | |
3268 | } | |
44d8db9e | 3269 | |
79c7626d | 3270 | assert(k == n); |
44d8db9e LP |
3271 | |
3272 | *fds = rfds; | |
da6053d0 | 3273 | return (int) n; |
44d8db9e LP |
3274 | } |
3275 | ||
e821075a LP |
3276 | static void socket_reset_failed(Unit *u) { |
3277 | Socket *s = SOCKET(u); | |
3278 | ||
3279 | assert(s); | |
3280 | ||
3281 | if (s->state == SOCKET_FAILED) | |
3282 | socket_set_state(s, SOCKET_DEAD); | |
3283 | ||
3284 | s->result = SOCKET_SUCCESS; | |
c968d76a | 3285 | s->clean_result = SOCKET_SUCCESS; |
e821075a LP |
3286 | } |
3287 | ||
6cf6bbc2 LP |
3288 | void socket_connection_unref(Socket *s) { |
3289 | assert(s); | |
3290 | ||
3291 | /* The service is dead. Yay! | |
3292 | * | |
35b8ca3a | 3293 | * This is strictly for one-instance-per-connection |
6cf6bbc2 LP |
3294 | * services. */ |
3295 | ||
3296 | assert(s->n_connections > 0); | |
3297 | s->n_connections--; | |
3298 | ||
f2341e0a | 3299 | log_unit_debug(UNIT(s), "One connection closed, %u left.", s->n_connections); |
5632e374 LP |
3300 | } |
3301 | ||
d137a488 UTL |
3302 | static void socket_trigger_notify(Unit *u, Unit *other) { |
3303 | Socket *s = SOCKET(u); | |
d137a488 UTL |
3304 | |
3305 | assert(u); | |
3306 | assert(other); | |
3307 | ||
d14e3a0d | 3308 | /* Filter out invocations with bogus state */ |
0377cd29 LP |
3309 | assert(UNIT_IS_LOAD_COMPLETE(other->load_state)); |
3310 | assert(other->type == UNIT_SERVICE); | |
d14e3a0d LP |
3311 | |
3312 | /* Don't propagate state changes from the service if we are already down */ | |
3313 | if (!IN_SET(s->state, SOCKET_RUNNING, SOCKET_LISTENING)) | |
d137a488 UTL |
3314 | return; |
3315 | ||
d14e3a0d LP |
3316 | /* We don't care for the service state if we are in Accept=yes mode */ |
3317 | if (s->accept) | |
3318 | return; | |
3319 | ||
3320 | /* Propagate start limit hit state */ | |
6bf0f408 LP |
3321 | if (other->start_limit_hit) { |
3322 | socket_enter_stop_pre(s, SOCKET_FAILURE_SERVICE_START_LIMIT_HIT); | |
d137a488 | 3323 | return; |
6bf0f408 | 3324 | } |
d137a488 | 3325 | |
d14e3a0d LP |
3326 | /* Don't propagate anything if there's still a job queued */ |
3327 | if (other->job) | |
6bf0f408 | 3328 | return; |
d137a488 | 3329 | |
6bf0f408 LP |
3330 | if (IN_SET(SERVICE(other)->state, |
3331 | SERVICE_DEAD, SERVICE_FAILED, | |
3332 | SERVICE_FINAL_SIGTERM, SERVICE_FINAL_SIGKILL, | |
3333 | SERVICE_AUTO_RESTART)) | |
3334 | socket_enter_listening(s); | |
d137a488 | 3335 | |
6bf0f408 | 3336 | if (SERVICE(other)->state == SERVICE_RUNNING) |
d137a488 UTL |
3337 | socket_set_state(s, SOCKET_RUNNING); |
3338 | } | |
3339 | ||
718db961 | 3340 | static int socket_kill(Unit *u, KillWho who, int signo, sd_bus_error *error) { |
814cc562 | 3341 | return unit_kill_common(u, who, signo, -1, SOCKET(u)->control_pid, error); |
8a0867d6 LP |
3342 | } |
3343 | ||
7a7821c8 | 3344 | static int socket_get_timeout(Unit *u, usec_t *timeout) { |
68db7a3b | 3345 | Socket *s = SOCKET(u); |
7a7821c8 | 3346 | usec_t t; |
68db7a3b ZJS |
3347 | int r; |
3348 | ||
3349 | if (!s->timer_event_source) | |
3350 | return 0; | |
3351 | ||
7a7821c8 | 3352 | r = sd_event_source_get_time(s->timer_event_source, &t); |
68db7a3b ZJS |
3353 | if (r < 0) |
3354 | return r; | |
7a7821c8 LP |
3355 | if (t == USEC_INFINITY) |
3356 | return 0; | |
68db7a3b | 3357 | |
7a7821c8 | 3358 | *timeout = t; |
68db7a3b ZJS |
3359 | return 1; |
3360 | } | |
3361 | ||
8dd4c05b LP |
3362 | char *socket_fdname(Socket *s) { |
3363 | assert(s); | |
3364 | ||
3365 | /* Returns the name to use for $LISTEN_NAMES. If the user | |
3366 | * didn't specify anything specifically, use the socket unit's | |
3367 | * name as fallback. */ | |
3368 | ||
84500122 | 3369 | return s->fdname ?: UNIT(s)->id; |
8dd4c05b LP |
3370 | } |
3371 | ||
291d565a LP |
3372 | static int socket_control_pid(Unit *u) { |
3373 | Socket *s = SOCKET(u); | |
3374 | ||
3375 | assert(s); | |
3376 | ||
3377 | return s->control_pid; | |
3378 | } | |
3379 | ||
c968d76a YW |
3380 | static int socket_clean(Unit *u, ExecCleanMask mask) { |
3381 | _cleanup_strv_free_ char **l = NULL; | |
3382 | Socket *s = SOCKET(u); | |
3383 | int r; | |
3384 | ||
3385 | assert(s); | |
3386 | assert(mask != 0); | |
3387 | ||
3388 | if (s->state != SOCKET_DEAD) | |
3389 | return -EBUSY; | |
3390 | ||
3391 | r = exec_context_get_clean_directories(&s->exec_context, u->manager->prefix, mask, &l); | |
3392 | if (r < 0) | |
3393 | return r; | |
3394 | ||
3395 | if (strv_isempty(l)) | |
3396 | return -EUNATCH; | |
3397 | ||
3398 | socket_unwatch_control_pid(s); | |
3399 | s->clean_result = SOCKET_SUCCESS; | |
3400 | s->control_command = NULL; | |
3401 | s->control_command_id = _SOCKET_EXEC_COMMAND_INVALID; | |
3402 | ||
3403 | r = socket_arm_timer(s, usec_add(now(CLOCK_MONOTONIC), s->exec_context.timeout_clean_usec)); | |
3404 | if (r < 0) | |
3405 | goto fail; | |
3406 | ||
3407 | r = unit_fork_and_watch_rm_rf(u, l, &s->control_pid); | |
3408 | if (r < 0) | |
3409 | goto fail; | |
3410 | ||
3411 | socket_set_state(s, SOCKET_CLEANING); | |
3412 | ||
3413 | return 0; | |
3414 | ||
3415 | fail: | |
3416 | log_unit_warning_errno(u, r, "Failed to initiate cleaning: %m"); | |
3417 | s->clean_result = SOCKET_FAILURE_RESOURCES; | |
5dcadb4c | 3418 | s->timer_event_source = sd_event_source_disable_unref(s->timer_event_source); |
c968d76a YW |
3419 | return r; |
3420 | } | |
3421 | ||
3422 | static int socket_can_clean(Unit *u, ExecCleanMask *ret) { | |
3423 | Socket *s = SOCKET(u); | |
3424 | ||
3425 | assert(s); | |
3426 | ||
3427 | return exec_context_get_clean_mask(&s->exec_context, ret); | |
3428 | } | |
3429 | ||
a16e1123 | 3430 | static const char* const socket_exec_command_table[_SOCKET_EXEC_COMMAND_MAX] = { |
836bb1cd YW |
3431 | [SOCKET_EXEC_START_PRE] = "ExecStartPre", |
3432 | [SOCKET_EXEC_START_CHOWN] = "ExecStartChown", | |
3433 | [SOCKET_EXEC_START_POST] = "ExecStartPost", | |
3434 | [SOCKET_EXEC_STOP_PRE] = "ExecStopPre", | |
3435 | [SOCKET_EXEC_STOP_POST] = "ExecStopPost" | |
a16e1123 LP |
3436 | }; |
3437 | ||
3438 | DEFINE_STRING_TABLE_LOOKUP(socket_exec_command, SocketExecCommand); | |
3439 | ||
cfc4eb4c LP |
3440 | static const char* const socket_result_table[_SOCKET_RESULT_MAX] = { |
3441 | [SOCKET_SUCCESS] = "success", | |
3442 | [SOCKET_FAILURE_RESOURCES] = "resources", | |
3443 | [SOCKET_FAILURE_TIMEOUT] = "timeout", | |
3444 | [SOCKET_FAILURE_EXIT_CODE] = "exit-code", | |
3445 | [SOCKET_FAILURE_SIGNAL] = "signal", | |
c2f34808 | 3446 | [SOCKET_FAILURE_CORE_DUMP] = "core-dump", |
07299350 | 3447 | [SOCKET_FAILURE_START_LIMIT_HIT] = "start-limit-hit", |
8b26cdbd | 3448 | [SOCKET_FAILURE_TRIGGER_LIMIT_HIT] = "trigger-limit-hit", |
6bf0f408 | 3449 | [SOCKET_FAILURE_SERVICE_START_LIMIT_HIT] = "service-start-limit-hit" |
cfc4eb4c LP |
3450 | }; |
3451 | ||
3452 | DEFINE_STRING_TABLE_LOOKUP(socket_result, SocketResult); | |
3453 | ||
9b191525 LP |
3454 | static const char* const socket_timestamping_table[_SOCKET_TIMESTAMPING_MAX] = { |
3455 | [SOCKET_TIMESTAMPING_OFF] = "off", | |
3456 | [SOCKET_TIMESTAMPING_US] = "us", | |
3457 | [SOCKET_TIMESTAMPING_NS] = "ns", | |
3458 | }; | |
3459 | ||
3460 | DEFINE_STRING_TABLE_LOOKUP(socket_timestamping, SocketTimestamping); | |
3461 | ||
3462 | SocketTimestamping socket_timestamping_from_string_harder(const char *p) { | |
3463 | SocketTimestamping t; | |
3464 | int r; | |
3465 | ||
3466 | if (!p) | |
3467 | return _SOCKET_TIMESTAMPING_INVALID; | |
3468 | ||
3469 | t = socket_timestamping_from_string(p); | |
3470 | if (t >= 0) | |
3471 | return t; | |
3472 | ||
3473 | /* Let's alternatively support the various other aliases parse_time() accepts for ns and µs here, | |
3474 | * too. */ | |
3475 | if (streq(p, "nsec")) | |
3476 | return SOCKET_TIMESTAMPING_NS; | |
3477 | if (STR_IN_SET(p, "usec", "µs")) | |
3478 | return SOCKET_TIMESTAMPING_US; | |
3479 | ||
3480 | r = parse_boolean(p); | |
3481 | if (r < 0) | |
3482 | return _SOCKET_TIMESTAMPING_INVALID; | |
3483 | ||
3484 | return r ? SOCKET_TIMESTAMPING_NS : SOCKET_TIMESTAMPING_OFF; /* If boolean yes, default to ns accuracy */ | |
3485 | } | |
3486 | ||
87f0e418 | 3487 | const UnitVTable socket_vtable = { |
7d17cfbc | 3488 | .object_size = sizeof(Socket), |
718db961 LP |
3489 | .exec_context_offset = offsetof(Socket, exec_context), |
3490 | .cgroup_context_offset = offsetof(Socket, cgroup_context), | |
3491 | .kill_context_offset = offsetof(Socket, kill_context), | |
613b411c | 3492 | .exec_runtime_offset = offsetof(Socket, exec_runtime), |
29206d46 | 3493 | .dynamic_creds_offset = offsetof(Socket, dynamic_creds), |
3ef63c31 | 3494 | |
f975e971 LP |
3495 | .sections = |
3496 | "Unit\0" | |
3497 | "Socket\0" | |
3498 | "Install\0", | |
4ad49000 | 3499 | .private_section = "Socket", |
71645aca | 3500 | |
9c0320e7 | 3501 | .can_transient = true, |
c80a9a33 LP |
3502 | .can_trigger = true, |
3503 | .can_fail = true, | |
9c0320e7 | 3504 | |
034c6ed7 LP |
3505 | .init = socket_init, |
3506 | .done = socket_done, | |
a16e1123 LP |
3507 | .load = socket_load, |
3508 | ||
3509 | .coldplug = socket_coldplug, | |
034c6ed7 | 3510 | |
5cb5a6ff LP |
3511 | .dump = socket_dump, |
3512 | ||
542563ba LP |
3513 | .start = socket_start, |
3514 | .stop = socket_stop, | |
5cb5a6ff | 3515 | |
718db961 | 3516 | .kill = socket_kill, |
c968d76a YW |
3517 | .clean = socket_clean, |
3518 | .can_clean = socket_can_clean, | |
718db961 | 3519 | |
68db7a3b ZJS |
3520 | .get_timeout = socket_get_timeout, |
3521 | ||
a16e1123 LP |
3522 | .serialize = socket_serialize, |
3523 | .deserialize_item = socket_deserialize_item, | |
01e10de3 | 3524 | .distribute_fds = socket_distribute_fds, |
a16e1123 | 3525 | |
5cb5a6ff | 3526 | .active_state = socket_active_state, |
10a94420 | 3527 | .sub_state_to_string = socket_sub_state_to_string, |
5cb5a6ff | 3528 | |
52a12341 YW |
3529 | .will_restart = unit_will_restart_default, |
3530 | ||
f2f725e5 | 3531 | .may_gc = socket_may_gc, |
6cf6bbc2 | 3532 | |
034c6ed7 | 3533 | .sigchld_event = socket_sigchld_event, |
4139c1b2 | 3534 | |
d137a488 UTL |
3535 | .trigger_notify = socket_trigger_notify, |
3536 | ||
fdf20a31 | 3537 | .reset_failed = socket_reset_failed, |
5632e374 | 3538 | |
291d565a LP |
3539 | .control_pid = socket_control_pid, |
3540 | ||
74c964d3 LP |
3541 | .bus_set_property = bus_socket_set_property, |
3542 | .bus_commit_properties = bus_socket_commit_properties, | |
c6918296 MS |
3543 | |
3544 | .status_message_formats = { | |
c6918296 MS |
3545 | .finished_start_job = { |
3546 | [JOB_DONE] = "Listening on %s.", | |
3547 | [JOB_FAILED] = "Failed to listen on %s.", | |
c6918296 MS |
3548 | [JOB_TIMEOUT] = "Timed out starting %s.", |
3549 | }, | |
3550 | .finished_stop_job = { | |
3551 | [JOB_DONE] = "Closed %s.", | |
3552 | [JOB_FAILED] = "Failed stopping %s.", | |
3553 | [JOB_TIMEOUT] = "Timed out stopping %s.", | |
3554 | }, | |
3555 | }, | |
5cb5a6ff | 3556 | }; |