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
) {
124 if (p
->type
!= SOCKET_SOCKET
)
127 if (!socket_address_can_accept(&p
->address
))
134 static int socket_verify(Socket
*s
) {
137 if (UNIT(s
)->meta
.load_state
!= UNIT_LOADED
)
141 log_error("%s lacks Listen setting. Refusing.", UNIT(s
)->meta
.id
);
148 static bool socket_needs_mount(Socket
*s
, const char *prefix
) {
153 LIST_FOREACH(port
, p
, s
->ports
) {
155 if (p
->type
== SOCKET_SOCKET
) {
156 if (socket_address_needs_mount(&p
->address
, prefix
))
159 assert(p
->type
== SOCKET_FIFO
);
160 if (path_startswith(p
->path
, prefix
))
168 int socket_add_one_mount_link(Socket
*s
, Mount
*m
) {
174 if (s
->meta
.load_state
!= UNIT_LOADED
||
175 m
->meta
.load_state
!= UNIT_LOADED
)
178 if (!socket_needs_mount(s
, m
->where
))
181 if ((r
= unit_add_dependency(UNIT(m
), UNIT_BEFORE
, UNIT(s
), true)) < 0)
184 if ((r
= unit_add_dependency(UNIT(s
), UNIT_REQUIRES
, UNIT(m
), true)) < 0)
190 static int socket_add_mount_links(Socket
*s
) {
196 LIST_FOREACH(units_per_type
, other
, s
->meta
.manager
->units_per_type
[UNIT_MOUNT
])
197 if ((r
= socket_add_one_mount_link(s
, (Mount
*) other
)) < 0)
203 static int socket_add_device_link(Socket
*s
) {
209 if (!s
->bind_to_device
)
212 if (asprintf(&t
, "/sys/subsystem/net/devices/%s", s
->bind_to_device
) < 0)
215 r
= unit_add_node_link(UNIT(s
), t
, false);
221 static int socket_load(Unit
*u
) {
222 Socket
*s
= SOCKET(u
);
226 assert(u
->meta
.load_state
== UNIT_STUB
);
228 if ((r
= unit_load_fragment_and_dropin(u
)) < 0)
231 /* This is a new unit? Then let's add in some extras */
232 if (u
->meta
.load_state
== UNIT_LOADED
) {
234 if (have_non_accept_socket(s
)) {
235 if ((r
= unit_load_related_unit(u
, ".service", (Unit
**) &s
->service
)))
238 if ((r
= unit_add_dependency(u
, UNIT_BEFORE
, UNIT(s
->service
), true)) < 0)
242 if ((r
= socket_add_mount_links(s
)) < 0)
245 if ((r
= socket_add_device_link(s
)) < 0)
248 if ((r
= unit_add_exec_dependencies(u
, &s
->exec_context
)) < 0)
251 if ((r
= unit_add_default_cgroup(u
)) < 0)
255 return socket_verify(s
);
258 static const char* listen_lookup(int type
) {
260 if (type
== SOCK_STREAM
)
261 return "ListenStream";
262 else if (type
== SOCK_DGRAM
)
263 return "ListenDatagram";
264 else if (type
== SOCK_SEQPACKET
)
265 return "ListenSequentialPacket";
267 assert_not_reached("Unknown socket type");
271 static void socket_dump(Unit
*u
, FILE *f
, const char *prefix
) {
274 Socket
*s
= SOCKET(u
);
282 p2
= strappend(prefix
, "\t");
283 prefix2
= p2
? p2
: prefix
;
286 "%sSocket State: %s\n"
287 "%sBindIPv6Only: %s\n"
290 "%sSocketMode: %04o\n"
291 "%sDirectoryMode: %04o\n",
292 prefix
, socket_state_to_string(s
->state
),
293 prefix
, socket_address_bind_ipv6_only_to_string(s
->bind_ipv6_only
),
295 prefix
, kill_mode_to_string(s
->kill_mode
),
296 prefix
, s
->socket_mode
,
297 prefix
, s
->directory_mode
);
299 if (s
->control_pid
> 0)
301 "%sControl PID: %llu\n",
302 prefix
, (unsigned long long) s
->control_pid
);
304 if (s
->bind_to_device
)
306 "%sBindToDevice: %s\n",
307 prefix
, s
->bind_to_device
);
312 prefix
, s
->n_accepted
);
314 LIST_FOREACH(port
, p
, s
->ports
) {
316 if (p
->type
== SOCKET_SOCKET
) {
321 if ((r
= socket_address_print(&p
->address
, &k
)) < 0)
326 fprintf(f
, "%s%s: %s\n", prefix
, listen_lookup(p
->address
.type
), k
);
329 fprintf(f
, "%sListenFIFO: %s\n", prefix
, p
->path
);
332 exec_context_dump(&s
->exec_context
, f
, prefix
);
334 for (c
= 0; c
< _SOCKET_EXEC_COMMAND_MAX
; c
++) {
335 if (!s
->exec_command
[c
])
338 fprintf(f
, "%s-> %s:\n",
339 prefix
, socket_exec_command_to_string(c
));
341 exec_command_dump_list(s
->exec_command
[c
], f
, prefix2
);
347 static int instance_from_socket(int fd
, unsigned nr
, char **instance
) {
352 struct sockaddr_un un
;
353 struct sockaddr_in in
;
354 struct sockaddr_in6 in6
;
355 struct sockaddr_storage storage
;
362 if (getsockname(fd
, &local
.sa
, &l
) < 0)
366 if (getpeername(fd
, &remote
.sa
, &l
) < 0)
369 switch (local
.sa
.sa_family
) {
373 a
= ntohl(local
.in
.sin_addr
.s_addr
),
374 b
= ntohl(remote
.in
.sin_addr
.s_addr
);
377 "%u-%u.%u.%u.%u:%u-%u.%u.%u.%u:%u",
379 a
>> 24, (a
>> 16) & 0xFF, (a
>> 8) & 0xFF, a
& 0xFF,
380 ntohs(local
.in
.sin_port
),
381 b
>> 24, (b
>> 16) & 0xFF, (b
>> 8) & 0xFF, b
& 0xFF,
382 ntohs(remote
.in
.sin_port
)) < 0)
389 static const char ipv4_prefix
[] = {
390 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0xFF, 0xFF
393 if (memcmp(&local
.in6
.sin6_addr
, ipv4_prefix
, sizeof(ipv4_prefix
)) == 0 &&
394 memcmp(&remote
.in6
.sin6_addr
, ipv4_prefix
, sizeof(ipv4_prefix
)) == 0) {
396 *a
= local
.in6
.sin6_addr
.s6_addr
+12,
397 *b
= remote
.in6
.sin6_addr
.s6_addr
+12;
400 "%u-%u.%u.%u.%u:%u-%u.%u.%u.%u:%u",
402 a
[0], a
[1], a
[2], a
[3],
403 ntohs(local
.in6
.sin6_port
),
404 b
[0], b
[1], b
[2], b
[3],
405 ntohs(remote
.in6
.sin6_port
)) < 0)
408 char a
[INET6_ADDRSTRLEN
], b
[INET6_ADDRSTRLEN
];
413 inet_ntop(AF_INET6
, &local
.in6
.sin6_addr
, a
, sizeof(a
)),
414 ntohs(local
.in6
.sin6_port
),
415 inet_ntop(AF_INET6
, &remote
.in6
.sin6_addr
, b
, sizeof(b
)),
416 ntohs(remote
.in6
.sin6_port
)) < 0)
427 if (getsockopt(fd
, SOL_SOCKET
, SO_PEERCRED
, &ucred
, &l
) < 0)
433 (unsigned long long) ucred
.pid
,
434 (unsigned long long) ucred
.uid
) < 0)
441 assert_not_reached("Unhandled socket type.");
448 static void socket_close_fds(Socket
*s
) {
453 LIST_FOREACH(port
, p
, s
->ports
) {
457 unit_unwatch_fd(UNIT(s
), &p
->fd_watch
);
458 close_nointr_nofail(p
->fd
);
460 /* One little note: we should never delete any sockets
461 * in the file system here! After all some other
462 * process we spawned might still have a reference of
463 * this fd and wants to continue to use it. Therefore
464 * we delete sockets in the file system before we
465 * create a new one, not after we stopped using
472 static int socket_open_fds(Socket
*s
) {
478 LIST_FOREACH(port
, p
, s
->ports
) {
483 if (p
->type
== SOCKET_SOCKET
) {
485 if ((r
= socket_address_listen(
497 assert(p
->type
== SOCKET_FIFO
);
499 mkdir_parents(p
->path
, s
->directory_mode
);
501 if (mkfifo(p
->path
, s
->socket_mode
) < 0 && errno
!= EEXIST
) {
506 if ((p
->fd
= open(p
->path
, O_RDWR
|O_CLOEXEC
|O_NOCTTY
|O_NONBLOCK
|O_NOFOLLOW
)) < 0) {
511 if (fstat(p
->fd
, &st
) < 0) {
516 /* FIXME verify user, access mode */
518 if (!S_ISFIFO(st
.st_mode
)) {
532 static void socket_unwatch_fds(Socket
*s
) {
537 LIST_FOREACH(port
, p
, s
->ports
) {
541 unit_unwatch_fd(UNIT(s
), &p
->fd_watch
);
545 static int socket_watch_fds(Socket
*s
) {
551 LIST_FOREACH(port
, p
, s
->ports
) {
555 p
->fd_watch
.socket_accept
=
557 p
->type
== SOCKET_SOCKET
&&
558 socket_address_can_accept(&p
->address
);
560 if ((r
= unit_watch_fd(UNIT(s
), p
->fd
, EPOLLIN
, &p
->fd_watch
)) < 0)
567 socket_unwatch_fds(s
);
571 static void socket_set_state(Socket
*s
, SocketState state
) {
572 SocketState old_state
;
575 old_state
= s
->state
;
578 if (state
!= SOCKET_START_PRE
&&
579 state
!= SOCKET_START_POST
&&
580 state
!= SOCKET_STOP_PRE
&&
581 state
!= SOCKET_STOP_PRE_SIGTERM
&&
582 state
!= SOCKET_STOP_PRE_SIGKILL
&&
583 state
!= SOCKET_STOP_POST
&&
584 state
!= SOCKET_FINAL_SIGTERM
&&
585 state
!= SOCKET_FINAL_SIGKILL
) {
586 unit_unwatch_timer(UNIT(s
), &s
->timer_watch
);
587 socket_unwatch_control_pid(s
);
588 s
->control_command
= NULL
;
589 s
->control_command_id
= _SOCKET_EXEC_COMMAND_INVALID
;
592 if (state
!= SOCKET_LISTENING
)
593 socket_unwatch_fds(s
);
595 if (state
!= SOCKET_START_POST
&&
596 state
!= SOCKET_LISTENING
&&
597 state
!= SOCKET_RUNNING
&&
598 state
!= SOCKET_STOP_PRE
&&
599 state
!= SOCKET_STOP_PRE_SIGTERM
&&
600 state
!= SOCKET_STOP_PRE_SIGKILL
)
603 if (state
!= old_state
)
604 log_debug("%s changed %s -> %s",
606 socket_state_to_string(old_state
),
607 socket_state_to_string(state
));
609 unit_notify(UNIT(s
), state_translation_table
[old_state
], state_translation_table
[state
]);
612 static int socket_coldplug(Unit
*u
) {
613 Socket
*s
= SOCKET(u
);
617 assert(s
->state
== SOCKET_DEAD
);
619 if (s
->deserialized_state
!= s
->state
) {
621 if (s
->deserialized_state
== SOCKET_START_PRE
||
622 s
->deserialized_state
== SOCKET_START_POST
||
623 s
->deserialized_state
== SOCKET_STOP_PRE
||
624 s
->deserialized_state
== SOCKET_STOP_PRE_SIGTERM
||
625 s
->deserialized_state
== SOCKET_STOP_PRE_SIGKILL
||
626 s
->deserialized_state
== SOCKET_STOP_POST
||
627 s
->deserialized_state
== SOCKET_FINAL_SIGTERM
||
628 s
->deserialized_state
== SOCKET_FINAL_SIGKILL
) {
630 if (s
->control_pid
<= 0)
633 if ((r
= unit_watch_pid(UNIT(s
), s
->control_pid
)) < 0)
636 if ((r
= unit_watch_timer(UNIT(s
), s
->timeout_usec
, &s
->timer_watch
)) < 0)
640 if (s
->deserialized_state
== SOCKET_START_POST
||
641 s
->deserialized_state
== SOCKET_LISTENING
||
642 s
->deserialized_state
== SOCKET_RUNNING
||
643 s
->deserialized_state
== SOCKET_STOP_PRE
||
644 s
->deserialized_state
== SOCKET_STOP_PRE_SIGTERM
||
645 s
->deserialized_state
== SOCKET_STOP_PRE_SIGKILL
)
646 if ((r
= socket_open_fds(s
)) < 0)
649 if (s
->deserialized_state
== SOCKET_LISTENING
)
650 if ((r
= socket_watch_fds(s
)) < 0)
653 socket_set_state(s
, s
->deserialized_state
);
659 static int socket_spawn(Socket
*s
, ExecCommand
*c
, pid_t
*_pid
) {
668 if ((r
= unit_watch_timer(UNIT(s
), s
->timeout_usec
, &s
->timer_watch
)) < 0)
671 if (!(argv
= unit_full_printf_strv(UNIT(s
), c
->argv
))) {
680 s
->meta
.manager
->environment
,
683 UNIT(s
)->meta
.manager
->confirm_spawn
,
684 UNIT(s
)->meta
.cgroup_bondings
,
691 if ((r
= unit_watch_pid(UNIT(s
), pid
)) < 0)
692 /* FIXME: we need to do something here */
700 unit_unwatch_timer(UNIT(s
), &s
->timer_watch
);
705 static void socket_enter_dead(Socket
*s
, bool success
) {
711 socket_set_state(s
, s
->failure
? SOCKET_MAINTAINANCE
: SOCKET_DEAD
);
714 static void socket_enter_signal(Socket
*s
, SocketState state
, bool success
);
716 static void socket_enter_stop_post(Socket
*s
, bool success
) {
723 socket_unwatch_control_pid(s
);
725 s
->control_command_id
= SOCKET_EXEC_STOP_POST
;
727 if ((s
->control_command
= s
->exec_command
[SOCKET_EXEC_STOP_POST
])) {
728 if ((r
= socket_spawn(s
, s
->control_command
, &s
->control_pid
)) < 0)
731 socket_set_state(s
, SOCKET_STOP_POST
);
733 socket_enter_signal(s
, SOCKET_FINAL_SIGTERM
, true);
738 log_warning("%s failed to run stop-post executable: %s", s
->meta
.id
, strerror(-r
));
739 socket_enter_signal(s
, SOCKET_FINAL_SIGTERM
, false);
742 static void socket_enter_signal(Socket
*s
, SocketState state
, bool success
) {
751 if (s
->kill_mode
!= KILL_NONE
) {
752 int sig
= (state
== SOCKET_STOP_PRE_SIGTERM
|| state
== SOCKET_FINAL_SIGTERM
) ? SIGTERM
: SIGKILL
;
754 if (s
->kill_mode
== KILL_CONTROL_GROUP
) {
756 if ((r
= cgroup_bonding_kill_list(UNIT(s
)->meta
.cgroup_bondings
, sig
)) < 0) {
757 if (r
!= -EAGAIN
&& r
!= -ESRCH
)
763 if (!sent
&& s
->control_pid
> 0)
764 if (kill(s
->kill_mode
== KILL_PROCESS
? s
->control_pid
: -s
->control_pid
, sig
) < 0 && errno
!= ESRCH
) {
770 if (sent
&& s
->control_pid
> 0) {
771 if ((r
= unit_watch_timer(UNIT(s
), s
->timeout_usec
, &s
->timer_watch
)) < 0)
774 socket_set_state(s
, state
);
775 } else if (state
== SOCKET_STOP_PRE_SIGTERM
|| state
== SOCKET_STOP_PRE_SIGKILL
)
776 socket_enter_stop_post(s
, true);
778 socket_enter_dead(s
, true);
783 log_warning("%s failed to kill processes: %s", s
->meta
.id
, strerror(-r
));
785 if (state
== SOCKET_STOP_PRE_SIGTERM
|| state
== SOCKET_STOP_PRE_SIGKILL
)
786 socket_enter_stop_post(s
, false);
788 socket_enter_dead(s
, false);
791 static void socket_enter_stop_pre(Socket
*s
, bool success
) {
798 socket_unwatch_control_pid(s
);
800 s
->control_command_id
= SOCKET_EXEC_STOP_PRE
;
802 if ((s
->control_command
= s
->exec_command
[SOCKET_EXEC_STOP_PRE
])) {
803 if ((r
= socket_spawn(s
, s
->control_command
, &s
->control_pid
)) < 0)
806 socket_set_state(s
, SOCKET_STOP_PRE
);
808 socket_enter_stop_post(s
, true);
813 log_warning("%s failed to run stop-pre executable: %s", s
->meta
.id
, strerror(-r
));
814 socket_enter_stop_post(s
, false);
817 static void socket_enter_listening(Socket
*s
) {
821 if ((r
= socket_watch_fds(s
)) < 0) {
822 log_warning("%s failed to watch sockets: %s", s
->meta
.id
, strerror(-r
));
826 socket_set_state(s
, SOCKET_LISTENING
);
830 socket_enter_stop_pre(s
, false);
833 static void socket_enter_start_post(Socket
*s
) {
837 if ((r
= socket_open_fds(s
)) < 0) {
838 log_warning("%s failed to listen on sockets: %s", s
->meta
.id
, strerror(-r
));
842 socket_unwatch_control_pid(s
);
844 s
->control_command_id
= SOCKET_EXEC_START_POST
;
846 if ((s
->control_command
= s
->exec_command
[SOCKET_EXEC_START_POST
])) {
847 if ((r
= socket_spawn(s
, s
->control_command
, &s
->control_pid
)) < 0) {
848 log_warning("%s failed to run start-post executable: %s", s
->meta
.id
, strerror(-r
));
852 socket_set_state(s
, SOCKET_START_POST
);
854 socket_enter_listening(s
);
859 socket_enter_stop_pre(s
, false);
862 static void socket_enter_start_pre(Socket
*s
) {
866 socket_unwatch_control_pid(s
);
868 s
->control_command_id
= SOCKET_EXEC_START_PRE
;
870 if ((s
->control_command
= s
->exec_command
[SOCKET_EXEC_START_PRE
])) {
871 if ((r
= socket_spawn(s
, s
->control_command
, &s
->control_pid
)) < 0)
874 socket_set_state(s
, SOCKET_START_PRE
);
876 socket_enter_start_post(s
);
881 log_warning("%s failed to run start-pre exectuable: %s", s
->meta
.id
, strerror(-r
));
882 socket_enter_dead(s
, false);
885 static void socket_enter_running(Socket
*s
, int cfd
) {
891 if ((r
= manager_add_job(UNIT(s
)->meta
.manager
, JOB_START
, UNIT(s
->service
), JOB_REPLACE
, true, NULL
)) < 0)
894 socket_set_state(s
, SOCKET_RUNNING
);
897 char *prefix
, *instance
, *name
;
899 if ((r
= instance_from_socket(cfd
, s
->n_accepted
++, &instance
)) < 0)
902 if (!(prefix
= unit_name_to_prefix(UNIT(s
)->meta
.id
))) {
908 name
= unit_name_build(prefix
, instance
, ".service");
917 r
= manager_load_unit(UNIT(s
)->meta
.manager
, name
, NULL
, &u
);
923 if ((r
= service_set_socket_fd(SERVICE(u
), cfd
)) < 0)
928 if ((r
= manager_add_job(u
->meta
.manager
, JOB_START
, u
, JOB_REPLACE
, true, NULL
)) < 0)
935 log_warning("%s failed to queue socket startup job: %s", s
->meta
.id
, strerror(-r
));
936 socket_enter_stop_pre(s
, false);
939 close_nointr_nofail(cfd
);
942 static void socket_run_next(Socket
*s
, bool success
) {
946 assert(s
->control_command
);
947 assert(s
->control_command
->command_next
);
952 socket_unwatch_control_pid(s
);
954 s
->control_command
= s
->control_command
->command_next
;
956 if ((r
= socket_spawn(s
, s
->control_command
, &s
->control_pid
)) < 0)
962 log_warning("%s failed to run spawn next executable: %s", s
->meta
.id
, strerror(-r
));
964 if (s
->state
== SOCKET_START_POST
)
965 socket_enter_stop_pre(s
, false);
966 else if (s
->state
== SOCKET_STOP_POST
)
967 socket_enter_dead(s
, false);
969 socket_enter_signal(s
, SOCKET_FINAL_SIGTERM
, false);
972 static int socket_start(Unit
*u
) {
973 Socket
*s
= SOCKET(u
);
977 /* We cannot fulfill this request right now, try again later
979 if (s
->state
== SOCKET_STOP_PRE
||
980 s
->state
== SOCKET_STOP_PRE_SIGKILL
||
981 s
->state
== SOCKET_STOP_PRE_SIGTERM
||
982 s
->state
== SOCKET_STOP_POST
||
983 s
->state
== SOCKET_FINAL_SIGTERM
||
984 s
->state
== SOCKET_FINAL_SIGKILL
)
987 if (s
->state
== SOCKET_START_PRE
||
988 s
->state
== SOCKET_START_POST
)
991 /* Cannot run this without the service being around */
993 if (s
->service
->meta
.load_state
!= UNIT_LOADED
)
996 /* If the service is alredy actvie we cannot start the
998 if (s
->service
->state
!= SERVICE_DEAD
&&
999 s
->service
->state
!= SERVICE_MAINTAINANCE
&&
1000 s
->service
->state
!= SERVICE_AUTO_RESTART
)
1004 assert(s
->state
== SOCKET_DEAD
|| s
->state
== SOCKET_MAINTAINANCE
);
1007 socket_enter_start_pre(s
);
1011 static int socket_stop(Unit
*u
) {
1012 Socket
*s
= SOCKET(u
);
1016 /* We cannot fulfill this request right now, try again later
1018 if (s
->state
== SOCKET_START_PRE
||
1019 s
->state
== SOCKET_START_POST
)
1023 if (s
->state
== SOCKET_STOP_PRE
||
1024 s
->state
== SOCKET_STOP_PRE_SIGTERM
||
1025 s
->state
== SOCKET_STOP_PRE_SIGKILL
||
1026 s
->state
== SOCKET_STOP_POST
||
1027 s
->state
== SOCKET_FINAL_SIGTERM
||
1028 s
->state
== SOCKET_FINAL_SIGTERM
)
1031 assert(s
->state
== SOCKET_LISTENING
|| s
->state
== SOCKET_RUNNING
);
1033 socket_enter_stop_pre(s
, true);
1037 static int socket_serialize(Unit
*u
, FILE *f
, FDSet
*fds
) {
1038 Socket
*s
= SOCKET(u
);
1046 unit_serialize_item(u
, f
, "state", socket_state_to_string(s
->state
));
1047 unit_serialize_item(u
, f
, "failure", yes_no(s
->failure
));
1048 unit_serialize_item_format(u
, f
, "n-accepted", "%u", s
->n_accepted
);
1050 if (s
->control_pid
> 0)
1051 unit_serialize_item_format(u
, f
, "control-pid", "%u", (unsigned) s
->control_pid
);
1053 if (s
->control_command_id
>= 0)
1054 unit_serialize_item(u
, f
, "control-command", socket_exec_command_to_string(s
->control_command_id
));
1056 LIST_FOREACH(port
, p
, s
->ports
) {
1062 if ((copy
= fdset_put_dup(fds
, p
->fd
)) < 0)
1065 if (p
->type
== SOCKET_SOCKET
) {
1068 if ((r
= socket_address_print(&p
->address
, &t
)) < 0)
1071 unit_serialize_item_format(u
, f
, "socket", "%i %s", copy
, t
);
1074 assert(p
->type
== SOCKET_FIFO
);
1075 unit_serialize_item_format(u
, f
, "fifo", "%i %s", copy
, p
->path
);
1082 static int socket_deserialize_item(Unit
*u
, const char *key
, const char *value
, FDSet
*fds
) {
1083 Socket
*s
= SOCKET(u
);
1091 if (streq(key
, "state")) {
1094 if ((state
= socket_state_from_string(value
)) < 0)
1095 log_debug("Failed to parse state value %s", value
);
1097 s
->deserialized_state
= state
;
1098 } else if (streq(key
, "failure")) {
1101 if ((b
= parse_boolean(value
)) < 0)
1102 log_debug("Failed to parse failure value %s", value
);
1104 s
->failure
= b
|| s
->failure
;
1106 } else if (streq(key
, "n-accepted")) {
1109 if ((r
= safe_atou(value
, &k
)) < 0)
1110 log_debug("Failed to parse n-accepted value %s", value
);
1113 } else if (streq(key
, "control-pid")) {
1116 if ((r
= safe_atou(value
, &pid
)) < 0 || pid
<= 0)
1117 log_debug("Failed to parse control-pid value %s", value
);
1119 s
->control_pid
= (pid_t
) pid
;
1120 } else if (streq(key
, "control-command")) {
1121 SocketExecCommand id
;
1123 if ((id
= socket_exec_command_from_string(value
)) < 0)
1124 log_debug("Failed to parse exec-command value %s", value
);
1126 s
->control_command_id
= id
;
1127 s
->control_command
= s
->exec_command
[id
];
1129 } else if (streq(key
, "fifo")) {
1133 if (sscanf(value
, "%i %n", &fd
, &skip
) < 1 || fd
< 0 || !fdset_contains(fds
, fd
))
1134 log_debug("Failed to parse fifo value %s", value
);
1137 LIST_FOREACH(port
, p
, s
->ports
)
1138 if (streq(p
->path
, value
+skip
))
1143 close_nointr_nofail(p
->fd
);
1144 p
->fd
= fdset_remove(fds
, fd
);
1148 } else if (streq(key
, "socket")) {
1152 if (sscanf(value
, "%i %n", &fd
, &skip
) < 1 || fd
< 0 || !fdset_contains(fds
, fd
))
1153 log_debug("Failed to parse socket value %s", value
);
1156 LIST_FOREACH(port
, p
, s
->ports
)
1157 if (socket_address_is(&p
->address
, value
+skip
))
1162 close_nointr_nofail(p
->fd
);
1163 p
->fd
= fdset_remove(fds
, fd
);
1168 log_debug("Unknown serialization key '%s'", key
);
1173 static UnitActiveState
socket_active_state(Unit
*u
) {
1176 return state_translation_table
[SOCKET(u
)->state
];
1179 static const char *socket_sub_state_to_string(Unit
*u
) {
1182 return socket_state_to_string(SOCKET(u
)->state
);
1185 static void socket_fd_event(Unit
*u
, int fd
, uint32_t events
, Watch
*w
) {
1186 Socket
*s
= SOCKET(u
);
1192 if (s
->state
!= SOCKET_LISTENING
)
1195 log_debug("Incoming traffic on %s", u
->meta
.id
);
1197 if (events
!= EPOLLIN
) {
1198 log_error("Got invalid poll event on socket.");
1202 if (w
->socket_accept
) {
1205 if ((cfd
= accept4(fd
, NULL
, NULL
, SOCK_NONBLOCK
)) < 0) {
1210 log_error("Failed to accept socket: %m");
1218 socket_enter_running(s
, cfd
);
1222 socket_enter_stop_pre(s
, false);
1225 static void socket_sigchld_event(Unit
*u
, pid_t pid
, int code
, int status
) {
1226 Socket
*s
= SOCKET(u
);
1232 success
= is_clean_exit(code
, status
);
1233 s
->failure
= s
->failure
|| !success
;
1235 assert(s
->control_pid
== pid
);
1238 if (s
->control_command
)
1239 exec_status_fill(&s
->control_command
->exec_status
, pid
, code
, status
);
1241 log_debug("%s control process exited, code=%s status=%i", u
->meta
.id
, sigchld_code_to_string(code
), status
);
1243 if (s
->control_command
&& s
->control_command
->command_next
&& success
) {
1244 log_debug("%s running next command for state %s", u
->meta
.id
, socket_state_to_string(s
->state
));
1245 socket_run_next(s
, success
);
1247 s
->control_command
= NULL
;
1248 s
->control_command_id
= _SOCKET_EXEC_COMMAND_INVALID
;
1250 /* No further commands for this step, so let's figure
1251 * out what to do next */
1253 log_debug("%s got final SIGCHLD for state %s", u
->meta
.id
, socket_state_to_string(s
->state
));
1257 case SOCKET_START_PRE
:
1259 socket_enter_start_post(s
);
1261 socket_enter_signal(s
, SOCKET_FINAL_SIGTERM
, false);
1264 case SOCKET_START_POST
:
1266 socket_enter_listening(s
);
1268 socket_enter_stop_pre(s
, false);
1271 case SOCKET_STOP_PRE
:
1272 case SOCKET_STOP_PRE_SIGTERM
:
1273 case SOCKET_STOP_PRE_SIGKILL
:
1274 socket_enter_stop_post(s
, success
);
1277 case SOCKET_STOP_POST
:
1278 case SOCKET_FINAL_SIGTERM
:
1279 case SOCKET_FINAL_SIGKILL
:
1280 socket_enter_dead(s
, success
);
1284 assert_not_reached("Uh, control process died at wrong time.");
1289 static void socket_timer_event(Unit
*u
, uint64_t elapsed
, Watch
*w
) {
1290 Socket
*s
= SOCKET(u
);
1293 assert(elapsed
== 1);
1294 assert(w
== &s
->timer_watch
);
1298 case SOCKET_START_PRE
:
1299 log_warning("%s starting timed out. Terminating.", u
->meta
.id
);
1300 socket_enter_signal(s
, SOCKET_FINAL_SIGTERM
, false);
1302 case SOCKET_START_POST
:
1303 log_warning("%s starting timed out. Stopping.", u
->meta
.id
);
1304 socket_enter_stop_pre(s
, false);
1307 case SOCKET_STOP_PRE
:
1308 log_warning("%s stopping timed out. Terminating.", u
->meta
.id
);
1309 socket_enter_signal(s
, SOCKET_STOP_PRE_SIGTERM
, false);
1312 case SOCKET_STOP_PRE_SIGTERM
:
1313 log_warning("%s stopping timed out. Killing.", u
->meta
.id
);
1314 socket_enter_signal(s
, SOCKET_STOP_PRE_SIGKILL
, false);
1317 case SOCKET_STOP_PRE_SIGKILL
:
1318 log_warning("%s still around after SIGKILL. Ignoring.", u
->meta
.id
);
1319 socket_enter_stop_post(s
, false);
1322 case SOCKET_STOP_POST
:
1323 log_warning("%s stopping timed out (2). Terminating.", u
->meta
.id
);
1324 socket_enter_signal(s
, SOCKET_FINAL_SIGTERM
, false);
1327 case SOCKET_FINAL_SIGTERM
:
1328 log_warning("%s stopping timed out (2). Killing.", u
->meta
.id
);
1329 socket_enter_signal(s
, SOCKET_FINAL_SIGKILL
, false);
1332 case SOCKET_FINAL_SIGKILL
:
1333 log_warning("%s still around after SIGKILL (2). Entering maintainance mode.", u
->meta
.id
);
1334 socket_enter_dead(s
, false);
1338 assert_not_reached("Timeout at wrong time.");
1342 int socket_collect_fds(Socket
*s
, int **fds
, unsigned *n_fds
) {
1351 /* Called from the service code for requesting our fds */
1354 LIST_FOREACH(port
, p
, s
->ports
)
1358 if (!(rfds
= new(int, rn_fds
)) < 0)
1362 LIST_FOREACH(port
, p
, s
->ports
)
1366 assert(k
== rn_fds
);
1374 void socket_notify_service_dead(Socket
*s
) {
1377 /* The service is dead. Dang. */
1379 if (s
->state
== SOCKET_RUNNING
) {
1380 log_debug("%s got notified about service death.", s
->meta
.id
);
1381 socket_enter_listening(s
);
1385 static const char* const socket_state_table
[_SOCKET_STATE_MAX
] = {
1386 [SOCKET_DEAD
] = "dead",
1387 [SOCKET_START_PRE
] = "start-pre",
1388 [SOCKET_START_POST
] = "start-post",
1389 [SOCKET_LISTENING
] = "listening",
1390 [SOCKET_RUNNING
] = "running",
1391 [SOCKET_STOP_PRE
] = "stop-pre",
1392 [SOCKET_STOP_PRE_SIGTERM
] = "stop-pre-sigterm",
1393 [SOCKET_STOP_PRE_SIGKILL
] = "stop-pre-sigkill",
1394 [SOCKET_STOP_POST
] = "stop-post",
1395 [SOCKET_FINAL_SIGTERM
] = "final-sigterm",
1396 [SOCKET_FINAL_SIGKILL
] = "final-sigkill",
1397 [SOCKET_MAINTAINANCE
] = "maintainance"
1400 DEFINE_STRING_TABLE_LOOKUP(socket_state
, SocketState
);
1402 static const char* const socket_exec_command_table
[_SOCKET_EXEC_COMMAND_MAX
] = {
1403 [SOCKET_EXEC_START_PRE
] = "StartPre",
1404 [SOCKET_EXEC_START_POST
] = "StartPost",
1405 [SOCKET_EXEC_STOP_PRE
] = "StopPre",
1406 [SOCKET_EXEC_STOP_POST
] = "StopPost"
1409 DEFINE_STRING_TABLE_LOOKUP(socket_exec_command
, SocketExecCommand
);
1411 const UnitVTable socket_vtable
= {
1412 .suffix
= ".socket",
1414 .init
= socket_init
,
1415 .done
= socket_done
,
1416 .load
= socket_load
,
1418 .coldplug
= socket_coldplug
,
1420 .dump
= socket_dump
,
1422 .start
= socket_start
,
1423 .stop
= socket_stop
,
1425 .serialize
= socket_serialize
,
1426 .deserialize_item
= socket_deserialize_item
,
1428 .active_state
= socket_active_state
,
1429 .sub_state_to_string
= socket_sub_state_to_string
,
1431 .fd_event
= socket_fd_event
,
1432 .sigchld_event
= socket_sigchld_event
,
1433 .timer_event
= socket_timer_event
,
1435 .bus_message_handler
= bus_socket_message_handler