2 * Copyright (C) 2013 Felix Fietkau <nbd@openwrt.org>
3 * Copyright (C) 2013 John Crispin <blogic@openwrt.org>
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU Lesser General Public License version 2.1
7 * as published by the Free Software Foundation
9 * This program is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
15 #include <sys/resource.h>
16 #include <sys/types.h>
17 #include <sys/socket.h>
24 #include <libubox/md5.h>
33 INSTANCE_ATTR_COMMAND
,
38 INSTANCE_ATTR_TRIGGER
,
39 INSTANCE_ATTR_RESPAWN
,
48 static const struct blobmsg_policy instance_attr
[__INSTANCE_ATTR_MAX
] = {
49 [INSTANCE_ATTR_COMMAND
] = { "command", BLOBMSG_TYPE_ARRAY
},
50 [INSTANCE_ATTR_ENV
] = { "env", BLOBMSG_TYPE_TABLE
},
51 [INSTANCE_ATTR_DATA
] = { "data", BLOBMSG_TYPE_TABLE
},
52 [INSTANCE_ATTR_NETDEV
] = { "netdev", BLOBMSG_TYPE_ARRAY
},
53 [INSTANCE_ATTR_FILE
] = { "file", BLOBMSG_TYPE_ARRAY
},
54 [INSTANCE_ATTR_TRIGGER
] = { "triggers", BLOBMSG_TYPE_ARRAY
},
55 [INSTANCE_ATTR_RESPAWN
] = { "respawn", BLOBMSG_TYPE_ARRAY
},
56 [INSTANCE_ATTR_NICE
] = { "nice", BLOBMSG_TYPE_INT32
},
57 [INSTANCE_ATTR_LIMITS
] = { "limits", BLOBMSG_TYPE_TABLE
},
58 [INSTANCE_ATTR_WATCH
] = { "watch", BLOBMSG_TYPE_ARRAY
},
59 [INSTANCE_ATTR_ERROR
] = { "error", BLOBMSG_TYPE_ARRAY
},
60 [INSTANCE_ATTR_USER
] = { "user", BLOBMSG_TYPE_STRING
},
63 struct instance_netdev
{
64 struct blobmsg_list_node node
;
68 struct instance_file
{
69 struct blobmsg_list_node node
;
78 static const struct rlimit_name rlimit_names
[] = {
80 { "core", RLIMIT_CORE
},
81 { "cpu", RLIMIT_CPU
},
82 { "data", RLIMIT_DATA
},
83 { "fsize", RLIMIT_FSIZE
},
84 { "memlock", RLIMIT_MEMLOCK
},
85 { "msgqueue", RLIMIT_MSGQUEUE
},
86 { "nice", RLIMIT_NICE
},
87 { "nofile", RLIMIT_NOFILE
},
88 { "nproc", RLIMIT_NPROC
},
89 { "rss", RLIMIT_RSS
},
90 { "rtprio", RLIMIT_RTPRIO
},
91 { "sigpending", RLIMIT_SIGPENDING
},
92 { "stack", RLIMIT_STACK
},
97 instance_limits(const char *limit
, const char *value
)
101 unsigned long cur
, max
;
103 for (i
= 0; rlimit_names
[i
].name
!= NULL
; i
++) {
104 if (strcmp(rlimit_names
[i
].name
, limit
))
106 if (!strcmp(value
, "unlimited")) {
107 rlim
.rlim_cur
= RLIM_INFINITY
;
108 rlim
.rlim_max
= RLIM_INFINITY
;
110 if (getrlimit(rlimit_names
[i
].resource
, &rlim
))
116 if (sscanf(value
, "%lu %lu", &cur
, &max
) < 1)
123 setrlimit(rlimit_names
[i
].resource
, &rlim
);
129 instance_run(struct service_instance
*in
)
131 struct blobmsg_list_node
*var
;
132 struct blob_attr
*cur
;
134 int argc
= 1; /* NULL terminated */
138 setpriority(PRIO_PROCESS
, 0, in
->nice
);
140 blobmsg_for_each_attr(cur
, in
->command
, rem
)
143 blobmsg_list_for_each(&in
->env
, var
)
144 setenv(blobmsg_name(var
->data
), blobmsg_data(var
->data
), 1);
146 blobmsg_list_for_each(&in
->limits
, var
)
147 instance_limits(blobmsg_name(var
->data
), blobmsg_data(var
->data
));
149 argv
= alloca(sizeof(char *) * argc
);
152 blobmsg_for_each_attr(cur
, in
->command
, rem
)
153 argv
[argc
++] = blobmsg_data(cur
);
156 fd
= open("/dev/null", O_RDWR
);
158 dup2(fd
, STDIN_FILENO
);
159 dup2(fd
, STDOUT_FILENO
);
160 dup2(fd
, STDERR_FILENO
);
161 if (fd
> STDERR_FILENO
)
164 if (in
->uid
|| in
->gid
) {
168 execvp(argv
[0], argv
);
173 instance_start(struct service_instance
*in
)
177 if (!avl_is_empty(&in
->errors
.avl
)) {
178 LOG("Not starting instance %s::%s, an error was indicated\n", in
->srv
->name
, in
->name
);
182 if (in
->proc
.pending
)
186 in
->halt
= !in
->respawn
;
201 DEBUG(2, "Started instance %s::%s\n", in
->srv
->name
, in
->name
);
203 clock_gettime(CLOCK_MONOTONIC
, &in
->start
);
204 uloop_process_add(&in
->proc
);
205 service_event("instance.start", in
->srv
->name
, in
->name
);
209 instance_timeout(struct uloop_timeout
*t
)
211 struct service_instance
*in
;
213 in
= container_of(t
, struct service_instance
, timeout
);
215 if (!in
->halt
&& (in
->restart
|| in
->respawn
))
220 instance_exit(struct uloop_process
*p
, int ret
)
222 struct service_instance
*in
;
226 in
= container_of(p
, struct service_instance
, proc
);
228 clock_gettime(CLOCK_MONOTONIC
, &tp
);
229 runtime
= tp
.tv_sec
- in
->start
.tv_sec
;
231 DEBUG(2, "Instance %s::%s exit with error code %d after %ld seconds\n", in
->srv
->name
, in
->name
, ret
, runtime
);
235 uloop_timeout_cancel(&in
->timeout
);
238 } else if (in
->restart
) {
240 } else if (in
->respawn
) {
241 if (runtime
< in
->respawn_threshold
)
244 in
->respawn_count
= 0;
245 if (in
->respawn_count
> in
->respawn_retry
&& in
->respawn_retry
> 0 ) {
246 LOG("Instance %s::%s s in a crash loop %d crashes, %ld seconds since last crash\n",
247 in
->srv
->name
, in
->name
, in
->respawn_count
, runtime
);
248 in
->restart
= in
->respawn
= 0;
251 uloop_timeout_set(&in
->timeout
, in
->respawn_timeout
* 1000);
254 service_event("instance.stop", in
->srv
->name
, in
->name
);
258 instance_stop(struct service_instance
*in
)
260 if (!in
->proc
.pending
)
263 in
->restart
= in
->respawn
= false;
264 kill(in
->proc
.pid
, SIGTERM
);
268 instance_restart(struct service_instance
*in
)
270 if (!in
->proc
.pending
)
274 kill(in
->proc
.pid
, SIGTERM
);
278 instance_config_changed(struct service_instance
*in
, struct service_instance
*in_new
)
283 if (!blob_attr_equal(in
->command
, in_new
->command
))
286 if (!blobmsg_list_equal(&in
->env
, &in_new
->env
))
289 if (!blobmsg_list_equal(&in
->data
, &in_new
->data
))
292 if (!blobmsg_list_equal(&in
->netdev
, &in_new
->netdev
))
295 if (!blobmsg_list_equal(&in
->file
, &in_new
->file
))
298 if (in
->nice
!= in_new
->nice
)
301 if (in
->uid
!= in_new
->uid
)
304 if (in
->gid
!= in_new
->gid
)
307 if (!blobmsg_list_equal(&in
->limits
, &in_new
->limits
))
310 if (!blobmsg_list_equal(&in
->errors
, &in_new
->errors
))
317 instance_netdev_cmp(struct blobmsg_list_node
*l1
, struct blobmsg_list_node
*l2
)
319 struct instance_netdev
*n1
= container_of(l1
, struct instance_netdev
, node
);
320 struct instance_netdev
*n2
= container_of(l2
, struct instance_netdev
, node
);
322 return n1
->ifindex
== n2
->ifindex
;
326 instance_netdev_update(struct blobmsg_list_node
*l
)
328 struct instance_netdev
*n
= container_of(l
, struct instance_netdev
, node
);
330 n
->ifindex
= if_nametoindex(n
->node
.avl
.key
);
334 instance_file_cmp(struct blobmsg_list_node
*l1
, struct blobmsg_list_node
*l2
)
336 struct instance_file
*f1
= container_of(l1
, struct instance_file
, node
);
337 struct instance_file
*f2
= container_of(l2
, struct instance_file
, node
);
339 return !memcmp(f1
->md5
, f2
->md5
, sizeof(f1
->md5
));
343 instance_file_update(struct blobmsg_list_node
*l
)
345 struct instance_file
*f
= container_of(l
, struct instance_file
, node
);
350 memset(f
->md5
, 0, sizeof(f
->md5
));
352 fd
= open(l
->avl
.key
, O_RDONLY
);
358 len
= read(fd
, buf
, sizeof(buf
));
368 md5_hash(buf
, len
, &md5
);
371 md5_end(f
->md5
, &md5
);
376 instance_fill_any(struct blobmsg_list
*l
, struct blob_attr
*cur
)
381 blobmsg_list_fill(l
, blobmsg_data(cur
), blobmsg_data_len(cur
), false);
385 instance_fill_array(struct blobmsg_list
*l
, struct blob_attr
*cur
, blobmsg_update_cb cb
, bool array
)
387 struct blobmsg_list_node
*node
;
392 if (!blobmsg_check_attr_list(cur
, BLOBMSG_TYPE_STRING
))
395 blobmsg_list_fill(l
, blobmsg_data(cur
), blobmsg_data_len(cur
), array
);
397 blobmsg_list_for_each(l
, node
)
404 instance_config_parse(struct service_instance
*in
)
406 struct blob_attr
*tb
[__INSTANCE_ATTR_MAX
];
407 struct blob_attr
*cur
, *cur2
;
411 blobmsg_parse(instance_attr
, __INSTANCE_ATTR_MAX
, tb
,
412 blobmsg_data(in
->config
), blobmsg_data_len(in
->config
));
414 cur
= tb
[INSTANCE_ATTR_COMMAND
];
418 if (!blobmsg_check_attr_list(cur
, BLOBMSG_TYPE_STRING
))
421 blobmsg_for_each_attr(cur2
, cur
, rem
) {
430 if (tb
[INSTANCE_ATTR_RESPAWN
]) {
432 uint32_t vals
[3] = { 3600, 5, 5};
434 blobmsg_for_each_attr(cur2
, tb
[INSTANCE_ATTR_RESPAWN
], rem
) {
435 if ((i
>= 3) && (blobmsg_type(cur2
) == BLOBMSG_TYPE_STRING
))
437 vals
[i
] = atoi(blobmsg_get_string(cur2
));
441 in
->respawn_count
= 0;
442 in
->respawn_threshold
= vals
[0];
443 in
->respawn_timeout
= vals
[1];
444 in
->respawn_retry
= vals
[2];
446 if (tb
[INSTANCE_ATTR_TRIGGER
]) {
447 in
->trigger
= tb
[INSTANCE_ATTR_TRIGGER
];
448 trigger_add(in
->trigger
, in
);
451 if (tb
[INSTANCE_ATTR_WATCH
]) {
452 blobmsg_for_each_attr(cur2
, tb
[INSTANCE_ATTR_WATCH
], rem
) {
453 if (blobmsg_type(cur2
) != BLOBMSG_TYPE_STRING
)
455 DEBUG(3, "watch for %s\n", blobmsg_get_string(cur2
));
456 watch_add(blobmsg_get_string(cur2
), in
);
460 if ((cur
= tb
[INSTANCE_ATTR_NICE
])) {
461 in
->nice
= (int8_t) blobmsg_get_u32(cur
);
462 if (in
->nice
< -20 || in
->nice
> 20)
466 if (tb
[INSTANCE_ATTR_USER
]) {
467 struct passwd
*p
= getpwnam(blobmsg_get_string(tb
[INSTANCE_ATTR_USER
]));
474 instance_fill_any(&in
->data
, tb
[INSTANCE_ATTR_DATA
]);
476 if (!instance_fill_array(&in
->env
, tb
[INSTANCE_ATTR_ENV
], NULL
, false))
479 if (!instance_fill_array(&in
->netdev
, tb
[INSTANCE_ATTR_NETDEV
], instance_netdev_update
, true))
482 if (!instance_fill_array(&in
->file
, tb
[INSTANCE_ATTR_FILE
], instance_file_update
, true))
485 if (!instance_fill_array(&in
->limits
, tb
[INSTANCE_ATTR_LIMITS
], NULL
, false))
488 if (!instance_fill_array(&in
->errors
, tb
[INSTANCE_ATTR_ERROR
], NULL
, true))
495 instance_config_cleanup(struct service_instance
*in
)
497 blobmsg_list_free(&in
->env
);
498 blobmsg_list_free(&in
->data
);
499 blobmsg_list_free(&in
->netdev
);
500 blobmsg_list_free(&in
->file
);
501 blobmsg_list_free(&in
->limits
);
502 blobmsg_list_free(&in
->errors
);
506 instance_config_move(struct service_instance
*in
, struct service_instance
*in_src
)
508 instance_config_cleanup(in
);
509 blobmsg_list_move(&in
->env
, &in_src
->env
);
510 blobmsg_list_move(&in
->data
, &in_src
->data
);
511 blobmsg_list_move(&in
->netdev
, &in_src
->netdev
);
512 blobmsg_list_move(&in
->file
, &in_src
->file
);
513 blobmsg_list_move(&in
->limits
, &in_src
->limits
);
514 blobmsg_list_move(&in
->errors
, &in_src
->errors
);
515 in
->trigger
= in_src
->trigger
;
516 in
->command
= in_src
->command
;
517 in
->name
= in_src
->name
;
518 in
->node
.avl
.key
= in_src
->node
.avl
.key
;
521 in
->config
= in_src
->config
;
522 in_src
->config
= NULL
;
526 instance_update(struct service_instance
*in
, struct service_instance
*in_new
)
528 bool changed
= instance_config_changed(in
, in_new
);
529 bool running
= in
->proc
.pending
;
531 if (!changed
&& running
)
536 instance_config_move(in
, in_new
);
539 instance_restart(in
);
540 instance_config_move(in
, in_new
);
541 /* restart happens in the child callback handler */
547 instance_free(struct service_instance
*in
)
549 uloop_process_delete(&in
->proc
);
550 uloop_timeout_cancel(&in
->timeout
);
553 instance_config_cleanup(in
);
559 instance_init(struct service_instance
*in
, struct service
*s
, struct blob_attr
*config
)
561 config
= blob_memdup(config
);
563 in
->name
= blobmsg_name(config
);
565 in
->timeout
.cb
= instance_timeout
;
566 in
->proc
.cb
= instance_exit
;
568 blobmsg_list_init(&in
->netdev
, struct instance_netdev
, node
, instance_netdev_cmp
);
569 blobmsg_list_init(&in
->file
, struct instance_file
, node
, instance_file_cmp
);
570 blobmsg_list_simple_init(&in
->env
);
571 blobmsg_list_simple_init(&in
->data
);
572 blobmsg_list_simple_init(&in
->limits
);
573 blobmsg_list_simple_init(&in
->errors
);
574 in
->valid
= instance_config_parse(in
);
577 void instance_dump(struct blob_buf
*b
, struct service_instance
*in
, int verbose
)
581 i
= blobmsg_open_table(b
, in
->name
);
582 blobmsg_add_u8(b
, "running", in
->proc
.pending
);
583 if (in
->proc
.pending
)
584 blobmsg_add_u32(b
, "pid", in
->proc
.pid
);
585 blobmsg_add_blob(b
, in
->command
);
587 if (!avl_is_empty(&in
->errors
.avl
)) {
588 struct blobmsg_list_node
*var
;
589 void *e
= blobmsg_open_array(b
, "errors");
590 blobmsg_list_for_each(&in
->errors
, var
)
591 blobmsg_add_string(b
, NULL
, blobmsg_data(var
->data
));
592 blobmsg_close_table(b
, e
);
595 if (!avl_is_empty(&in
->env
.avl
)) {
596 struct blobmsg_list_node
*var
;
597 void *e
= blobmsg_open_table(b
, "env");
598 blobmsg_list_for_each(&in
->env
, var
)
599 blobmsg_add_string(b
, blobmsg_name(var
->data
), blobmsg_data(var
->data
));
600 blobmsg_close_table(b
, e
);
603 if (!avl_is_empty(&in
->data
.avl
)) {
604 struct blobmsg_list_node
*var
;
605 void *e
= blobmsg_open_table(b
, "data");
606 blobmsg_list_for_each(&in
->data
, var
)
607 blobmsg_add_blob(b
, var
->data
);
608 blobmsg_close_table(b
, e
);
611 if (!avl_is_empty(&in
->limits
.avl
)) {
612 struct blobmsg_list_node
*var
;
613 void *e
= blobmsg_open_table(b
, "limits");
614 blobmsg_list_for_each(&in
->limits
, var
)
615 blobmsg_add_string(b
, blobmsg_name(var
->data
), blobmsg_data(var
->data
));
616 blobmsg_close_table(b
, e
);
620 void *r
= blobmsg_open_table(b
, "respawn");
621 blobmsg_add_u32(b
, "timeout", in
->respawn_timeout
);
622 blobmsg_add_u32(b
, "threshold", in
->respawn_threshold
);
623 blobmsg_add_u32(b
, "retry", in
->respawn_retry
);
624 blobmsg_close_table(b
, r
);
627 if (verbose
&& in
->trigger
)
628 blobmsg_add_blob(b
, in
->trigger
);
630 blobmsg_close_table(b
, i
);