1 /*-*- Mode: C; c-basic-offset: 8 -*-*/
4 This file is part of systemd.
6 Copyright 2010 Lennart Poettering
8 systemd is free software; you can redistribute it and/or modify it
9 under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 2 of the License, or
11 (at your option) any later version.
13 systemd is distributed in the hope that it will be useful, but
14 WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 General Public License for more details.
18 You should have received a copy of the GNU General Public License
19 along with systemd; If not, see <http://www.gnu.org/licenses/>.
22 #include <sys/types.h>
27 #include <sys/epoll.h>
29 #include <arpa/inet.h>
34 #include "load-dropin.h"
35 #include "load-fragment.h"
37 #include "unit-name.h"
38 #include "dbus-socket.h"
40 static const UnitActiveState state_translation_table
[_SOCKET_STATE_MAX
] = {
41 [SOCKET_DEAD
] = UNIT_INACTIVE
,
42 [SOCKET_START_PRE
] = UNIT_ACTIVATING
,
43 [SOCKET_START_POST
] = UNIT_ACTIVATING
,
44 [SOCKET_LISTENING
] = UNIT_ACTIVE
,
45 [SOCKET_RUNNING
] = UNIT_ACTIVE
,
46 [SOCKET_STOP_PRE
] = UNIT_DEACTIVATING
,
47 [SOCKET_STOP_PRE_SIGTERM
] = UNIT_DEACTIVATING
,
48 [SOCKET_STOP_PRE_SIGKILL
] = UNIT_DEACTIVATING
,
49 [SOCKET_STOP_POST
] = UNIT_DEACTIVATING
,
50 [SOCKET_FINAL_SIGTERM
] = UNIT_DEACTIVATING
,
51 [SOCKET_FINAL_SIGKILL
] = UNIT_DEACTIVATING
,
52 [SOCKET_MAINTAINANCE
] = UNIT_INACTIVE
,
55 static void socket_init(Unit
*u
) {
56 Socket
*s
= SOCKET(u
);
59 assert(u
->meta
.load_state
== UNIT_STUB
);
61 s
->timer_watch
.type
= WATCH_INVALID
;
62 s
->backlog
= SOMAXCONN
;
63 s
->timeout_usec
= DEFAULT_TIMEOUT_USEC
;
64 s
->directory_mode
= 0755;
65 s
->socket_mode
= 0666;
67 exec_context_init(&s
->exec_context
);
69 s
->control_command_id
= _SOCKET_EXEC_COMMAND_INVALID
;
72 static void socket_unwatch_control_pid(Socket
*s
) {
75 if (s
->control_pid
<= 0)
78 unit_unwatch_pid(UNIT(s
), s
->control_pid
);
82 static void socket_done(Unit
*u
) {
83 Socket
*s
= SOCKET(u
);
88 while ((p
= s
->ports
)) {
89 LIST_REMOVE(SocketPort
, port
, s
->ports
, p
);
92 unit_unwatch_fd(UNIT(s
), &p
->fd_watch
);
93 close_nointr_nofail(p
->fd
);
100 exec_context_done(&s
->exec_context
);
101 exec_command_free_array(s
->exec_command
, _SOCKET_EXEC_COMMAND_MAX
);
102 s
->control_command
= NULL
;
104 socket_unwatch_control_pid(s
);
108 free(s
->bind_to_device
);
109 s
->bind_to_device
= NULL
;
111 unit_unwatch_timer(u
, &s
->timer_watch
);
114 static bool have_non_accept_socket(Socket
*s
) {
122 LIST_FOREACH(port
, p
, s
->ports
)
123 if (!socket_address_can_accept(&p
->address
))
129 static int socket_verify(Socket
*s
) {
132 if (UNIT(s
)->meta
.load_state
!= UNIT_LOADED
)
136 log_error("%s lacks Listen setting. Refusing.", UNIT(s
)->meta
.id
);
143 static int socket_load(Unit
*u
) {
144 Socket
*s
= SOCKET(u
);
148 assert(u
->meta
.load_state
== UNIT_STUB
);
150 if ((r
= unit_load_fragment_and_dropin(u
)) < 0)
153 /* This is a new unit? Then let's add in some extras */
154 if (u
->meta
.load_state
== UNIT_LOADED
) {
156 if (have_non_accept_socket(s
)) {
157 if ((r
= unit_load_related_unit(u
, ".service", (Unit
**) &s
->service
)))
160 if ((r
= unit_add_dependency(u
, UNIT_BEFORE
, UNIT(s
->service
), true)) < 0)
164 if ((r
= unit_add_exec_dependencies(u
, &s
->exec_context
)) < 0)
167 if ((r
= unit_add_default_cgroup(u
)) < 0)
171 return socket_verify(s
);
174 static const char* listen_lookup(int type
) {
176 if (type
== SOCK_STREAM
)
177 return "ListenStream";
178 else if (type
== SOCK_DGRAM
)
179 return "ListenDatagram";
180 else if (type
== SOCK_SEQPACKET
)
181 return "ListenSequentialPacket";
183 assert_not_reached("Unknown socket type");
187 static void socket_dump(Unit
*u
, FILE *f
, const char *prefix
) {
190 Socket
*s
= SOCKET(u
);
198 p2
= strappend(prefix
, "\t");
199 prefix2
= p2
? p2
: prefix
;
202 "%sSocket State: %s\n"
203 "%sBindIPv6Only: %s\n"
206 "%sSocketMode: %04o\n"
207 "%sDirectoryMode: %04o\n",
208 prefix
, socket_state_to_string(s
->state
),
209 prefix
, yes_no(s
->bind_ipv6_only
),
211 prefix
, kill_mode_to_string(s
->kill_mode
),
212 prefix
, s
->socket_mode
,
213 prefix
, s
->directory_mode
);
215 if (s
->control_pid
> 0)
217 "%sControl PID: %llu\n",
218 prefix
, (unsigned long long) s
->control_pid
);
220 if (s
->bind_to_device
)
222 "%sBindToDevice: %s\n",
223 prefix
, s
->bind_to_device
);
228 prefix
, s
->n_accepted
);
230 LIST_FOREACH(port
, p
, s
->ports
) {
232 if (p
->type
== SOCKET_SOCKET
) {
237 if ((r
= socket_address_print(&p
->address
, &k
)) < 0)
242 fprintf(f
, "%s%s: %s\n", prefix
, listen_lookup(p
->address
.type
), k
);
245 fprintf(f
, "%sListenFIFO: %s\n", prefix
, p
->path
);
248 exec_context_dump(&s
->exec_context
, f
, prefix
);
250 for (c
= 0; c
< _SOCKET_EXEC_COMMAND_MAX
; c
++) {
251 if (!s
->exec_command
[c
])
254 fprintf(f
, "%s→ %s:\n",
255 prefix
, socket_exec_command_to_string(c
));
257 exec_command_dump_list(s
->exec_command
[c
], f
, prefix2
);
263 static int instance_from_socket(int fd
, unsigned nr
, char **instance
) {
268 struct sockaddr_un un
;
269 struct sockaddr_in in
;
270 struct sockaddr_in6 in6
;
271 struct sockaddr_storage storage
;
278 if (getsockname(fd
, &local
.sa
, &l
) < 0)
282 if (getpeername(fd
, &remote
.sa
, &l
) < 0)
285 switch (local
.sa
.sa_family
) {
289 a
= ntohl(local
.in
.sin_addr
.s_addr
),
290 b
= ntohl(remote
.in
.sin_addr
.s_addr
);
293 "%u-%u.%u.%u.%u:%u-%u.%u.%u.%u:%u",
295 a
>> 24, (a
>> 16) & 0xFF, (a
>> 8) & 0xFF, a
& 0xFF,
296 ntohs(local
.in
.sin_port
),
297 b
>> 24, (b
>> 16) & 0xFF, (b
>> 8) & 0xFF, b
& 0xFF,
298 ntohs(remote
.in
.sin_port
)) < 0)
305 char a
[INET6_ADDRSTRLEN
], b
[INET6_ADDRSTRLEN
];
310 inet_ntop(AF_INET6
, &local
.in6
.sin6_addr
, a
, sizeof(a
)),
311 ntohs(local
.in6
.sin6_port
),
312 inet_ntop(AF_INET6
, &remote
.in6
.sin6_addr
, b
, sizeof(b
)),
313 ntohs(remote
.in6
.sin6_port
)) < 0)
323 if (getsockopt(fd
, SOL_SOCKET
, SO_PEERCRED
, &ucred
, &l
) < 0)
329 (unsigned long long) ucred
.pid
,
330 (unsigned long long) ucred
.uid
) < 0)
337 assert_not_reached("Unhandled socket type.");
344 static void socket_close_fds(Socket
*s
) {
349 LIST_FOREACH(port
, p
, s
->ports
) {
353 unit_unwatch_fd(UNIT(s
), &p
->fd_watch
);
354 close_nointr_nofail(p
->fd
);
356 /* One little note: we should never delete any sockets
357 * in the file system here! After all some other
358 * process we spawned might still have a reference of
359 * this fd and wants to continue to use it. Therefore
360 * we delete sockets in the file system before we
361 * create a new one, not after we stopped using
368 static int socket_open_fds(Socket
*s
) {
374 LIST_FOREACH(port
, p
, s
->ports
) {
379 if (p
->type
== SOCKET_SOCKET
) {
381 if ((r
= socket_address_listen(
393 assert(p
->type
== SOCKET_FIFO
);
395 mkdir_parents(p
->path
, s
->directory_mode
);
397 if (mkfifo(p
->path
, s
->socket_mode
) < 0 && errno
!= EEXIST
) {
402 if ((p
->fd
= open(p
->path
, O_RDWR
|O_CLOEXEC
|O_NOCTTY
|O_NONBLOCK
|O_NOFOLLOW
)) < 0) {
407 if (fstat(p
->fd
, &st
) < 0) {
412 /* FIXME verify user, access mode */
414 if (!S_ISFIFO(st
.st_mode
)) {
428 static void socket_unwatch_fds(Socket
*s
) {
433 LIST_FOREACH(port
, p
, s
->ports
) {
437 unit_unwatch_fd(UNIT(s
), &p
->fd_watch
);
441 static int socket_watch_fds(Socket
*s
) {
447 LIST_FOREACH(port
, p
, s
->ports
) {
451 p
->fd_watch
.data
.socket_accept
=
453 socket_address_can_accept(&p
->address
);
455 if ((r
= unit_watch_fd(UNIT(s
), p
->fd
, EPOLLIN
, &p
->fd_watch
)) < 0)
462 socket_unwatch_fds(s
);
466 static void socket_set_state(Socket
*s
, SocketState state
) {
467 SocketState old_state
;
470 old_state
= s
->state
;
473 if (state
!= SOCKET_START_PRE
&&
474 state
!= SOCKET_START_POST
&&
475 state
!= SOCKET_STOP_PRE
&&
476 state
!= SOCKET_STOP_PRE_SIGTERM
&&
477 state
!= SOCKET_STOP_PRE_SIGKILL
&&
478 state
!= SOCKET_STOP_POST
&&
479 state
!= SOCKET_FINAL_SIGTERM
&&
480 state
!= SOCKET_FINAL_SIGKILL
) {
481 unit_unwatch_timer(UNIT(s
), &s
->timer_watch
);
482 socket_unwatch_control_pid(s
);
483 s
->control_command
= NULL
;
484 s
->control_command_id
= _SOCKET_EXEC_COMMAND_INVALID
;
487 if (state
!= SOCKET_LISTENING
)
488 socket_unwatch_fds(s
);
490 if (state
!= SOCKET_START_POST
&&
491 state
!= SOCKET_LISTENING
&&
492 state
!= SOCKET_RUNNING
&&
493 state
!= SOCKET_STOP_PRE
&&
494 state
!= SOCKET_STOP_PRE_SIGTERM
&&
495 state
!= SOCKET_STOP_PRE_SIGKILL
)
498 if (state
!= old_state
)
499 log_debug("%s changed %s → %s",
501 socket_state_to_string(old_state
),
502 socket_state_to_string(state
));
504 unit_notify(UNIT(s
), state_translation_table
[old_state
], state_translation_table
[state
]);
507 static int socket_coldplug(Unit
*u
) {
508 Socket
*s
= SOCKET(u
);
512 assert(s
->state
== SOCKET_DEAD
);
514 if (s
->deserialized_state
!= s
->state
) {
516 if (s
->deserialized_state
== SOCKET_START_PRE
||
517 s
->deserialized_state
== SOCKET_START_POST
||
518 s
->deserialized_state
== SOCKET_STOP_PRE
||
519 s
->deserialized_state
== SOCKET_STOP_PRE_SIGTERM
||
520 s
->deserialized_state
== SOCKET_STOP_PRE_SIGKILL
||
521 s
->deserialized_state
== SOCKET_STOP_POST
||
522 s
->deserialized_state
== SOCKET_FINAL_SIGTERM
||
523 s
->deserialized_state
== SOCKET_FINAL_SIGKILL
) {
525 if (s
->control_pid
<= 0)
528 if ((r
= unit_watch_pid(UNIT(s
), s
->control_pid
)) < 0)
531 if ((r
= unit_watch_timer(UNIT(s
), s
->timeout_usec
, &s
->timer_watch
)) < 0)
535 if (s
->deserialized_state
== SOCKET_START_POST
||
536 s
->deserialized_state
== SOCKET_LISTENING
||
537 s
->deserialized_state
== SOCKET_RUNNING
||
538 s
->deserialized_state
== SOCKET_STOP_PRE
||
539 s
->deserialized_state
== SOCKET_STOP_PRE_SIGTERM
||
540 s
->deserialized_state
== SOCKET_STOP_PRE_SIGKILL
)
541 if ((r
= socket_open_fds(s
)) < 0)
544 if (s
->deserialized_state
== SOCKET_LISTENING
)
545 if ((r
= socket_watch_fds(s
)) < 0)
548 socket_set_state(s
, s
->deserialized_state
);
554 static int socket_spawn(Socket
*s
, ExecCommand
*c
, pid_t
*_pid
) {
563 if ((r
= unit_watch_timer(UNIT(s
), s
->timeout_usec
, &s
->timer_watch
)) < 0)
566 if (!(argv
= unit_full_printf_strv(UNIT(s
), c
->argv
))) {
577 UNIT(s
)->meta
.manager
->confirm_spawn
,
578 UNIT(s
)->meta
.cgroup_bondings
,
585 if ((r
= unit_watch_pid(UNIT(s
), pid
)) < 0)
586 /* FIXME: we need to do something here */
594 unit_unwatch_timer(UNIT(s
), &s
->timer_watch
);
599 static void socket_enter_dead(Socket
*s
, bool success
) {
605 socket_set_state(s
, s
->failure
? SOCKET_MAINTAINANCE
: SOCKET_DEAD
);
608 static void socket_enter_signal(Socket
*s
, SocketState state
, bool success
);
610 static void socket_enter_stop_post(Socket
*s
, bool success
) {
617 socket_unwatch_control_pid(s
);
619 s
->control_command_id
= SOCKET_EXEC_STOP_POST
;
621 if ((s
->control_command
= s
->exec_command
[SOCKET_EXEC_STOP_POST
])) {
622 if ((r
= socket_spawn(s
, s
->control_command
, &s
->control_pid
)) < 0)
625 socket_set_state(s
, SOCKET_STOP_POST
);
627 socket_enter_signal(s
, SOCKET_FINAL_SIGTERM
, true);
632 log_warning("%s failed to run stop-post executable: %s", s
->meta
.id
, strerror(-r
));
633 socket_enter_signal(s
, SOCKET_FINAL_SIGTERM
, false);
636 static void socket_enter_signal(Socket
*s
, SocketState state
, bool success
) {
645 if (s
->kill_mode
!= KILL_NONE
) {
646 int sig
= (state
== SOCKET_STOP_PRE_SIGTERM
|| state
== SOCKET_FINAL_SIGTERM
) ? SIGTERM
: SIGKILL
;
648 if (s
->kill_mode
== KILL_CONTROL_GROUP
) {
650 if ((r
= cgroup_bonding_kill_list(UNIT(s
)->meta
.cgroup_bondings
, sig
)) < 0) {
651 if (r
!= -EAGAIN
&& r
!= -ESRCH
)
657 if (!sent
&& s
->control_pid
> 0)
658 if (kill(s
->kill_mode
== KILL_PROCESS
? s
->control_pid
: -s
->control_pid
, sig
) < 0 && errno
!= ESRCH
) {
665 if ((r
= unit_watch_timer(UNIT(s
), s
->timeout_usec
, &s
->timer_watch
)) < 0)
668 socket_set_state(s
, state
);
669 } else if (state
== SOCKET_STOP_PRE_SIGTERM
|| state
== SOCKET_STOP_PRE_SIGKILL
)
670 socket_enter_stop_post(s
, true);
672 socket_enter_dead(s
, true);
677 log_warning("%s failed to kill processes: %s", s
->meta
.id
, strerror(-r
));
679 if (state
== SOCKET_STOP_PRE_SIGTERM
|| state
== SOCKET_STOP_PRE_SIGKILL
)
680 socket_enter_stop_post(s
, false);
682 socket_enter_dead(s
, false);
685 static void socket_enter_stop_pre(Socket
*s
, bool success
) {
692 socket_unwatch_control_pid(s
);
694 s
->control_command_id
= SOCKET_EXEC_STOP_PRE
;
696 if ((s
->control_command
= s
->exec_command
[SOCKET_EXEC_STOP_PRE
])) {
697 if ((r
= socket_spawn(s
, s
->control_command
, &s
->control_pid
)) < 0)
700 socket_set_state(s
, SOCKET_STOP_PRE
);
702 socket_enter_stop_post(s
, true);
707 log_warning("%s failed to run stop-pre executable: %s", s
->meta
.id
, strerror(-r
));
708 socket_enter_stop_post(s
, false);
711 static void socket_enter_listening(Socket
*s
) {
715 if ((r
= socket_watch_fds(s
)) < 0) {
716 log_warning("%s failed to watch sockets: %s", s
->meta
.id
, strerror(-r
));
720 socket_set_state(s
, SOCKET_LISTENING
);
724 socket_enter_stop_pre(s
, false);
727 static void socket_enter_start_post(Socket
*s
) {
731 if ((r
= socket_open_fds(s
)) < 0) {
732 log_warning("%s failed to listen on sockets: %s", s
->meta
.id
, strerror(-r
));
736 socket_unwatch_control_pid(s
);
738 s
->control_command_id
= SOCKET_EXEC_START_POST
;
740 if ((s
->control_command
= s
->exec_command
[SOCKET_EXEC_START_POST
])) {
741 if ((r
= socket_spawn(s
, s
->control_command
, &s
->control_pid
)) < 0) {
742 log_warning("%s failed to run start-post executable: %s", s
->meta
.id
, strerror(-r
));
746 socket_set_state(s
, SOCKET_START_POST
);
748 socket_enter_listening(s
);
753 socket_enter_stop_pre(s
, false);
756 static void socket_enter_start_pre(Socket
*s
) {
760 socket_unwatch_control_pid(s
);
762 s
->control_command_id
= SOCKET_EXEC_START_PRE
;
764 if ((s
->control_command
= s
->exec_command
[SOCKET_EXEC_START_PRE
])) {
765 if ((r
= socket_spawn(s
, s
->control_command
, &s
->control_pid
)) < 0)
768 socket_set_state(s
, SOCKET_START_PRE
);
770 socket_enter_start_post(s
);
775 log_warning("%s failed to run start-pre exectuable: %s", s
->meta
.id
, strerror(-r
));
776 socket_enter_dead(s
, false);
779 static void socket_enter_running(Socket
*s
, int cfd
) {
785 if ((r
= manager_add_job(UNIT(s
)->meta
.manager
, JOB_START
, UNIT(s
->service
), JOB_REPLACE
, true, NULL
)) < 0)
788 socket_set_state(s
, SOCKET_RUNNING
);
791 char *prefix
, *instance
, *name
;
793 if ((r
= instance_from_socket(cfd
, s
->n_accepted
++, &instance
)))
796 if (!(prefix
= unit_name_to_prefix(UNIT(s
)->meta
.id
))) {
802 name
= unit_name_build(prefix
, instance
, ".service");
809 r
= manager_load_unit(UNIT(s
)->meta
.manager
, name
, NULL
, &u
);
815 if ((r
= service_set_socket_fd(SERVICE(u
), cfd
) < 0))
820 if ((r
= manager_add_job(u
->meta
.manager
, JOB_START
, u
, JOB_REPLACE
, true, NULL
)) < 0)
827 log_warning("%s failed to queue socket startup job: %s", s
->meta
.id
, strerror(-r
));
828 socket_enter_stop_pre(s
, false);
831 close_nointr_nofail(cfd
);
834 static void socket_run_next(Socket
*s
, bool success
) {
838 assert(s
->control_command
);
839 assert(s
->control_command
->command_next
);
844 socket_unwatch_control_pid(s
);
846 s
->control_command
= s
->control_command
->command_next
;
848 if ((r
= socket_spawn(s
, s
->control_command
, &s
->control_pid
)) < 0)
854 log_warning("%s failed to run spawn next executable: %s", s
->meta
.id
, strerror(-r
));
856 if (s
->state
== SOCKET_START_POST
)
857 socket_enter_stop_pre(s
, false);
858 else if (s
->state
== SOCKET_STOP_POST
)
859 socket_enter_dead(s
, false);
861 socket_enter_signal(s
, SOCKET_FINAL_SIGTERM
, false);
864 static int socket_start(Unit
*u
) {
865 Socket
*s
= SOCKET(u
);
869 /* We cannot fulfill this request right now, try again later
871 if (s
->state
== SOCKET_STOP_PRE
||
872 s
->state
== SOCKET_STOP_PRE_SIGKILL
||
873 s
->state
== SOCKET_STOP_PRE_SIGTERM
||
874 s
->state
== SOCKET_STOP_POST
||
875 s
->state
== SOCKET_FINAL_SIGTERM
||
876 s
->state
== SOCKET_FINAL_SIGKILL
)
879 if (s
->state
== SOCKET_START_PRE
||
880 s
->state
== SOCKET_START_POST
)
883 /* Cannot run this without the service being around */
885 if (s
->service
->meta
.load_state
!= UNIT_LOADED
)
888 /* If the service is alredy actvie we cannot start the
890 if (s
->service
->state
!= SERVICE_DEAD
&&
891 s
->service
->state
!= SERVICE_MAINTAINANCE
&&
892 s
->service
->state
!= SERVICE_AUTO_RESTART
)
896 assert(s
->state
== SOCKET_DEAD
|| s
->state
== SOCKET_MAINTAINANCE
);
899 socket_enter_start_pre(s
);
903 static int socket_stop(Unit
*u
) {
904 Socket
*s
= SOCKET(u
);
908 /* We cannot fulfill this request right now, try again later
910 if (s
->state
== SOCKET_START_PRE
||
911 s
->state
== SOCKET_START_POST
)
915 if (s
->state
== SOCKET_STOP_PRE
||
916 s
->state
== SOCKET_STOP_PRE_SIGTERM
||
917 s
->state
== SOCKET_STOP_PRE_SIGKILL
||
918 s
->state
== SOCKET_STOP_POST
||
919 s
->state
== SOCKET_FINAL_SIGTERM
||
920 s
->state
== SOCKET_FINAL_SIGTERM
)
923 assert(s
->state
== SOCKET_LISTENING
|| s
->state
== SOCKET_RUNNING
);
925 socket_enter_stop_pre(s
, true);
929 static int socket_serialize(Unit
*u
, FILE *f
, FDSet
*fds
) {
930 Socket
*s
= SOCKET(u
);
938 unit_serialize_item(u
, f
, "state", socket_state_to_string(s
->state
));
939 unit_serialize_item(u
, f
, "failure", yes_no(s
->failure
));
940 unit_serialize_item_format(u
, f
, "n-accepted", "%u", s
->n_accepted
);
942 if (s
->control_pid
> 0)
943 unit_serialize_item_format(u
, f
, "control-pid", "%u", (unsigned) s
->control_pid
);
945 if (s
->control_command_id
>= 0)
946 unit_serialize_item(u
, f
, "control-command", socket_exec_command_to_string(s
->control_command_id
));
948 LIST_FOREACH(port
, p
, s
->ports
) {
954 if ((copy
= fdset_put_dup(fds
, p
->fd
)) < 0)
957 if (p
->type
== SOCKET_SOCKET
) {
960 if ((r
= socket_address_print(&p
->address
, &t
)) < 0)
963 unit_serialize_item_format(u
, f
, "socket", "%i %s", copy
, t
);
966 assert(p
->type
== SOCKET_FIFO
);
967 unit_serialize_item_format(u
, f
, "fifo", "%i %s", copy
, p
->path
);
974 static int socket_deserialize_item(Unit
*u
, const char *key
, const char *value
, FDSet
*fds
) {
975 Socket
*s
= SOCKET(u
);
983 if (streq(key
, "state")) {
986 if ((state
= socket_state_from_string(value
)) < 0)
987 log_debug("Failed to parse state value %s", value
);
989 s
->deserialized_state
= state
;
990 } else if (streq(key
, "failure")) {
993 if ((b
= parse_boolean(value
)) < 0)
994 log_debug("Failed to parse failure value %s", value
);
996 s
->failure
= b
|| s
->failure
;
998 } else if (streq(key
, "n-accepted")) {
1001 if ((r
= safe_atou(value
, &k
)) < 0)
1002 log_debug("Failed to parse n-accepted value %s", value
);
1005 } else if (streq(key
, "control-pid")) {
1008 if ((r
= safe_atou(value
, &pid
)) < 0 || pid
<= 0)
1009 log_debug("Failed to parse control-pid value %s", value
);
1011 s
->control_pid
= (pid_t
) pid
;
1012 } else if (streq(key
, "control-command")) {
1013 SocketExecCommand id
;
1015 if ((id
= socket_exec_command_from_string(value
)) < 0)
1016 log_debug("Failed to parse exec-command value %s", value
);
1018 s
->control_command_id
= id
;
1019 s
->control_command
= s
->exec_command
[id
];
1021 } else if (streq(key
, "fifo")) {
1025 if (sscanf(value
, "%i %n", &fd
, &skip
) < 1 || fd
< 0 || !fdset_contains(fds
, fd
))
1026 log_debug("Failed to parse fifo value %s", value
);
1029 LIST_FOREACH(port
, p
, s
->ports
)
1030 if (streq(p
->path
, value
+skip
))
1035 close_nointr_nofail(p
->fd
);
1036 p
->fd
= fdset_remove(fds
, fd
);
1040 } else if (streq(key
, "socket")) {
1044 if (sscanf(value
, "%i %n", &fd
, &skip
) < 1 || fd
< 0 || !fdset_contains(fds
, fd
))
1045 log_debug("Failed to parse socket value %s", value
);
1048 LIST_FOREACH(port
, p
, s
->ports
)
1049 if (socket_address_is(&p
->address
, value
+skip
))
1054 close_nointr_nofail(p
->fd
);
1055 p
->fd
= fdset_remove(fds
, fd
);
1060 log_debug("Unknown serialization key '%s'", key
);
1065 static UnitActiveState
socket_active_state(Unit
*u
) {
1068 return state_translation_table
[SOCKET(u
)->state
];
1071 static const char *socket_sub_state_to_string(Unit
*u
) {
1074 return socket_state_to_string(SOCKET(u
)->state
);
1077 static void socket_fd_event(Unit
*u
, int fd
, uint32_t events
, Watch
*w
) {
1078 Socket
*s
= SOCKET(u
);
1084 log_debug("Incoming traffic on %s", u
->meta
.id
);
1086 if (events
!= EPOLLIN
) {
1087 log_error("Got invalid poll event on socket.");
1091 if (w
->data
.socket_accept
) {
1094 if ((cfd
= accept4(fd
, NULL
, NULL
, SOCK_NONBLOCK
)) < 0) {
1099 log_error("Failed to accept socket: %m");
1107 log_debug("cfd=%i", cfd
);
1108 socket_enter_running(s
, cfd
);
1112 socket_enter_stop_pre(s
, false);
1115 static void socket_sigchld_event(Unit
*u
, pid_t pid
, int code
, int status
) {
1116 Socket
*s
= SOCKET(u
);
1122 success
= code
== CLD_EXITED
&& status
== 0;
1123 s
->failure
= s
->failure
|| !success
;
1125 assert(s
->control_pid
== pid
);
1128 if (s
->control_command
)
1129 exec_status_fill(&s
->control_command
->exec_status
, pid
, code
, status
);
1131 log_debug("%s control process exited, code=%s status=%i", u
->meta
.id
, sigchld_code_to_string(code
), status
);
1133 if (s
->control_command
&& s
->control_command
->command_next
&& success
) {
1134 log_debug("%s running next command for state %s", u
->meta
.id
, socket_state_to_string(s
->state
));
1135 socket_run_next(s
, success
);
1137 s
->control_command
= NULL
;
1138 s
->control_command_id
= _SOCKET_EXEC_COMMAND_INVALID
;
1140 /* No further commands for this step, so let's figure
1141 * out what to do next */
1143 log_debug("%s got final SIGCHLD for state %s", u
->meta
.id
, socket_state_to_string(s
->state
));
1147 case SOCKET_START_PRE
:
1149 socket_enter_start_post(s
);
1151 socket_enter_signal(s
, SOCKET_FINAL_SIGTERM
, false);
1154 case SOCKET_START_POST
:
1156 socket_enter_listening(s
);
1158 socket_enter_stop_pre(s
, false);
1161 case SOCKET_STOP_PRE
:
1162 case SOCKET_STOP_PRE_SIGTERM
:
1163 case SOCKET_STOP_PRE_SIGKILL
:
1164 socket_enter_stop_post(s
, success
);
1167 case SOCKET_STOP_POST
:
1168 case SOCKET_FINAL_SIGTERM
:
1169 case SOCKET_FINAL_SIGKILL
:
1170 socket_enter_dead(s
, success
);
1174 assert_not_reached("Uh, control process died at wrong time.");
1179 static void socket_timer_event(Unit
*u
, uint64_t elapsed
, Watch
*w
) {
1180 Socket
*s
= SOCKET(u
);
1183 assert(elapsed
== 1);
1184 assert(w
== &s
->timer_watch
);
1188 case SOCKET_START_PRE
:
1189 log_warning("%s starting timed out. Terminating.", u
->meta
.id
);
1190 socket_enter_signal(s
, SOCKET_FINAL_SIGTERM
, false);
1192 case SOCKET_START_POST
:
1193 log_warning("%s starting timed out. Stopping.", u
->meta
.id
);
1194 socket_enter_stop_pre(s
, false);
1197 case SOCKET_STOP_PRE
:
1198 log_warning("%s stopping timed out. Terminating.", u
->meta
.id
);
1199 socket_enter_signal(s
, SOCKET_STOP_PRE_SIGTERM
, false);
1202 case SOCKET_STOP_PRE_SIGTERM
:
1203 log_warning("%s stopping timed out. Killing.", u
->meta
.id
);
1204 socket_enter_signal(s
, SOCKET_STOP_PRE_SIGKILL
, false);
1207 case SOCKET_STOP_PRE_SIGKILL
:
1208 log_warning("%s still around after SIGKILL. Ignoring.", u
->meta
.id
);
1209 socket_enter_stop_post(s
, false);
1212 case SOCKET_STOP_POST
:
1213 log_warning("%s stopping timed out (2). Terminating.", u
->meta
.id
);
1214 socket_enter_signal(s
, SOCKET_FINAL_SIGTERM
, false);
1217 case SOCKET_FINAL_SIGTERM
:
1218 log_warning("%s stopping timed out (2). Killing.", u
->meta
.id
);
1219 socket_enter_signal(s
, SOCKET_FINAL_SIGKILL
, false);
1222 case SOCKET_FINAL_SIGKILL
:
1223 log_warning("%s still around after SIGKILL (2). Entering maintainance mode.", u
->meta
.id
);
1224 socket_enter_dead(s
, false);
1228 assert_not_reached("Timeout at wrong time.");
1232 int socket_collect_fds(Socket
*s
, int **fds
, unsigned *n_fds
) {
1241 /* Called from the service code for requesting our fds */
1244 LIST_FOREACH(port
, p
, s
->ports
)
1248 if (!(rfds
= new(int, rn_fds
)) < 0)
1252 LIST_FOREACH(port
, p
, s
->ports
)
1256 assert(k
== rn_fds
);
1264 void socket_notify_service_dead(Socket
*s
) {
1267 /* The service is dead. Dang. */
1269 if (s
->state
== SOCKET_RUNNING
) {
1270 log_debug("%s got notified about service death.", s
->meta
.id
);
1271 socket_enter_listening(s
);
1275 static const char* const socket_state_table
[_SOCKET_STATE_MAX
] = {
1276 [SOCKET_DEAD
] = "dead",
1277 [SOCKET_START_PRE
] = "start-pre",
1278 [SOCKET_START_POST
] = "start-post",
1279 [SOCKET_LISTENING
] = "listening",
1280 [SOCKET_RUNNING
] = "running",
1281 [SOCKET_STOP_PRE
] = "stop-pre",
1282 [SOCKET_STOP_PRE_SIGTERM
] = "stop-pre-sigterm",
1283 [SOCKET_STOP_PRE_SIGKILL
] = "stop-pre-sigkill",
1284 [SOCKET_STOP_POST
] = "stop-post",
1285 [SOCKET_FINAL_SIGTERM
] = "final-sigterm",
1286 [SOCKET_FINAL_SIGKILL
] = "final-sigkill",
1287 [SOCKET_MAINTAINANCE
] = "maintainance"
1290 DEFINE_STRING_TABLE_LOOKUP(socket_state
, SocketState
);
1292 static const char* const socket_exec_command_table
[_SOCKET_EXEC_COMMAND_MAX
] = {
1293 [SOCKET_EXEC_START_PRE
] = "StartPre",
1294 [SOCKET_EXEC_START_POST
] = "StartPost",
1295 [SOCKET_EXEC_STOP_PRE
] = "StopPre",
1296 [SOCKET_EXEC_STOP_POST
] = "StopPost"
1299 DEFINE_STRING_TABLE_LOOKUP(socket_exec_command
, SocketExecCommand
);
1301 const UnitVTable socket_vtable
= {
1302 .suffix
= ".socket",
1304 .init
= socket_init
,
1305 .done
= socket_done
,
1306 .load
= socket_load
,
1308 .coldplug
= socket_coldplug
,
1310 .dump
= socket_dump
,
1312 .start
= socket_start
,
1313 .stop
= socket_stop
,
1315 .serialize
= socket_serialize
,
1316 .deserialize_item
= socket_deserialize_item
,
1318 .active_state
= socket_active_state
,
1319 .sub_state_to_string
= socket_sub_state_to_string
,
1321 .fd_event
= socket_fd_event
,
1322 .sigchld_event
= socket_sigchld_event
,
1323 .timer_event
= socket_timer_event
,
1325 .bus_message_handler
= bus_socket_message_handler