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>
23 #include <libubox/md5.h>
32 INSTANCE_ATTR_COMMAND
,
37 INSTANCE_ATTR_TRIGGER
,
38 INSTANCE_ATTR_RESPAWN
,
46 static const struct blobmsg_policy instance_attr
[__INSTANCE_ATTR_MAX
] = {
47 [INSTANCE_ATTR_COMMAND
] = { "command", BLOBMSG_TYPE_ARRAY
},
48 [INSTANCE_ATTR_ENV
] = { "env", BLOBMSG_TYPE_TABLE
},
49 [INSTANCE_ATTR_DATA
] = { "data", BLOBMSG_TYPE_TABLE
},
50 [INSTANCE_ATTR_NETDEV
] = { "netdev", BLOBMSG_TYPE_ARRAY
},
51 [INSTANCE_ATTR_FILE
] = { "file", BLOBMSG_TYPE_ARRAY
},
52 [INSTANCE_ATTR_TRIGGER
] = { "triggers", BLOBMSG_TYPE_ARRAY
},
53 [INSTANCE_ATTR_RESPAWN
] = { "respawn", BLOBMSG_TYPE_ARRAY
},
54 [INSTANCE_ATTR_NICE
] = { "nice", BLOBMSG_TYPE_INT32
},
55 [INSTANCE_ATTR_LIMITS
] = { "limits", BLOBMSG_TYPE_TABLE
},
56 [INSTANCE_ATTR_WATCH
] = { "watch", BLOBMSG_TYPE_ARRAY
},
57 [INSTANCE_ATTR_ERROR
] = { "error", BLOBMSG_TYPE_ARRAY
},
60 struct instance_netdev
{
61 struct blobmsg_list_node node
;
65 struct instance_file
{
66 struct blobmsg_list_node node
;
75 static const struct rlimit_name rlimit_names
[] = {
77 { "core", RLIMIT_CORE
},
78 { "cpu", RLIMIT_CPU
},
79 { "data", RLIMIT_DATA
},
80 { "fsize", RLIMIT_FSIZE
},
81 { "memlock", RLIMIT_MEMLOCK
},
82 { "msgqueue", RLIMIT_MSGQUEUE
},
83 { "nice", RLIMIT_NICE
},
84 { "nofile", RLIMIT_NOFILE
},
85 { "nproc", RLIMIT_NPROC
},
86 { "rss", RLIMIT_RSS
},
87 { "rtprio", RLIMIT_RTPRIO
},
88 { "sigpending", RLIMIT_SIGPENDING
},
89 { "stack", RLIMIT_STACK
},
94 instance_limits(const char *limit
, const char *value
)
98 unsigned long cur
, max
;
100 for (i
= 0; rlimit_names
[i
].name
!= NULL
; i
++) {
101 if (strcmp(rlimit_names
[i
].name
, limit
))
103 if (!strcmp(value
, "unlimited")) {
104 rlim
.rlim_cur
= RLIM_INFINITY
;
105 rlim
.rlim_max
= RLIM_INFINITY
;
107 if (getrlimit(rlimit_names
[i
].resource
, &rlim
))
113 if (sscanf(value
, "%lu %lu", &cur
, &max
) < 1)
120 setrlimit(rlimit_names
[i
].resource
, &rlim
);
126 instance_run(struct service_instance
*in
)
128 struct blobmsg_list_node
*var
;
129 struct blob_attr
*cur
;
131 int argc
= 1; /* NULL terminated */
135 setpriority(PRIO_PROCESS
, 0, in
->nice
);
137 blobmsg_for_each_attr(cur
, in
->command
, rem
)
140 blobmsg_list_for_each(&in
->env
, var
)
141 setenv(blobmsg_name(var
->data
), blobmsg_data(var
->data
), 1);
143 blobmsg_list_for_each(&in
->limits
, var
)
144 instance_limits(blobmsg_name(var
->data
), blobmsg_data(var
->data
));
146 argv
= alloca(sizeof(char *) * argc
);
149 blobmsg_for_each_attr(cur
, in
->command
, rem
)
150 argv
[argc
++] = blobmsg_data(cur
);
153 fd
= open("/dev/null", O_RDWR
);
155 dup2(fd
, STDIN_FILENO
);
156 dup2(fd
, STDOUT_FILENO
);
157 dup2(fd
, STDERR_FILENO
);
158 if (fd
> STDERR_FILENO
)
161 execvp(argv
[0], argv
);
166 instance_start(struct service_instance
*in
)
170 if (!avl_is_empty(&in
->errors
.avl
)) {
171 LOG("Not starting instance %s::%s, an error was indicated\n", in
->srv
->name
, in
->name
);
175 if (in
->proc
.pending
)
179 in
->halt
= !in
->respawn
;
194 DEBUG(2, "Started instance %s::%s\n", in
->srv
->name
, in
->name
);
196 clock_gettime(CLOCK_MONOTONIC
, &in
->start
);
197 uloop_process_add(&in
->proc
);
198 service_event("instance.start", in
->srv
->name
, in
->name
);
202 instance_timeout(struct uloop_timeout
*t
)
204 struct service_instance
*in
;
206 in
= container_of(t
, struct service_instance
, timeout
);
208 if (!in
->halt
&& (in
->restart
|| in
->respawn
))
213 instance_exit(struct uloop_process
*p
, int ret
)
215 struct service_instance
*in
;
219 in
= container_of(p
, struct service_instance
, proc
);
221 clock_gettime(CLOCK_MONOTONIC
, &tp
);
222 runtime
= tp
.tv_sec
- in
->start
.tv_sec
;
224 DEBUG(2, "Instance %s::%s exit with error code %d after %ld seconds\n", in
->srv
->name
, in
->name
, ret
, runtime
);
228 uloop_timeout_cancel(&in
->timeout
);
231 } else if (in
->restart
) {
233 } else if (in
->respawn
) {
234 if (runtime
< in
->respawn_threshold
)
237 in
->respawn_count
= 0;
238 if (in
->respawn_count
> in
->respawn_retry
&& in
->respawn_retry
> 0 ) {
239 LOG("Instance %s::%s s in a crash loop %d crashes, %ld seconds since last crash\n",
240 in
->srv
->name
, in
->name
, in
->respawn_count
, runtime
);
241 in
->restart
= in
->respawn
= 0;
244 uloop_timeout_set(&in
->timeout
, in
->respawn_timeout
* 1000);
247 service_event("instance.stop", in
->srv
->name
, in
->name
);
251 instance_stop(struct service_instance
*in
)
253 if (!in
->proc
.pending
)
256 in
->restart
= in
->respawn
= false;
257 kill(in
->proc
.pid
, SIGTERM
);
261 instance_restart(struct service_instance
*in
)
263 if (!in
->proc
.pending
)
267 kill(in
->proc
.pid
, SIGTERM
);
271 instance_config_changed(struct service_instance
*in
, struct service_instance
*in_new
)
276 if (!blob_attr_equal(in
->command
, in_new
->command
))
279 if (!blobmsg_list_equal(&in
->env
, &in_new
->env
))
282 if (!blobmsg_list_equal(&in
->data
, &in_new
->data
))
285 if (!blobmsg_list_equal(&in
->netdev
, &in_new
->netdev
))
288 if (!blobmsg_list_equal(&in
->file
, &in_new
->file
))
291 if (in
->nice
!= in_new
->nice
)
294 if (!blobmsg_list_equal(&in
->limits
, &in_new
->limits
))
297 if (!blobmsg_list_equal(&in
->errors
, &in_new
->errors
))
304 instance_netdev_cmp(struct blobmsg_list_node
*l1
, struct blobmsg_list_node
*l2
)
306 struct instance_netdev
*n1
= container_of(l1
, struct instance_netdev
, node
);
307 struct instance_netdev
*n2
= container_of(l2
, struct instance_netdev
, node
);
309 return n1
->ifindex
== n2
->ifindex
;
313 instance_netdev_update(struct blobmsg_list_node
*l
)
315 struct instance_netdev
*n
= container_of(l
, struct instance_netdev
, node
);
317 n
->ifindex
= if_nametoindex(n
->node
.avl
.key
);
321 instance_file_cmp(struct blobmsg_list_node
*l1
, struct blobmsg_list_node
*l2
)
323 struct instance_file
*f1
= container_of(l1
, struct instance_file
, node
);
324 struct instance_file
*f2
= container_of(l2
, struct instance_file
, node
);
326 return !memcmp(f1
->md5
, f2
->md5
, sizeof(f1
->md5
));
330 instance_file_update(struct blobmsg_list_node
*l
)
332 struct instance_file
*f
= container_of(l
, struct instance_file
, node
);
337 memset(f
->md5
, 0, sizeof(f
->md5
));
339 fd
= open(l
->avl
.key
, O_RDONLY
);
345 len
= read(fd
, buf
, sizeof(buf
));
355 md5_hash(buf
, len
, &md5
);
358 md5_end(f
->md5
, &md5
);
363 instance_fill_array(struct blobmsg_list
*l
, struct blob_attr
*cur
, blobmsg_update_cb cb
, bool array
)
365 struct blobmsg_list_node
*node
;
370 if (!blobmsg_check_attr_list(cur
, BLOBMSG_TYPE_STRING
))
373 blobmsg_list_fill(l
, blobmsg_data(cur
), blobmsg_data_len(cur
), array
);
375 blobmsg_list_for_each(l
, node
)
382 instance_config_parse(struct service_instance
*in
)
384 struct blob_attr
*tb
[__INSTANCE_ATTR_MAX
];
385 struct blob_attr
*cur
, *cur2
;
389 blobmsg_parse(instance_attr
, __INSTANCE_ATTR_MAX
, tb
,
390 blobmsg_data(in
->config
), blobmsg_data_len(in
->config
));
392 cur
= tb
[INSTANCE_ATTR_COMMAND
];
396 if (!blobmsg_check_attr_list(cur
, BLOBMSG_TYPE_STRING
))
399 blobmsg_for_each_attr(cur2
, cur
, rem
) {
408 if (tb
[INSTANCE_ATTR_RESPAWN
]) {
410 uint32_t vals
[3] = { 3600, 5, 5};
412 blobmsg_for_each_attr(cur2
, tb
[INSTANCE_ATTR_RESPAWN
], rem
) {
413 if ((i
>= 3) && (blobmsg_type(cur2
) == BLOBMSG_TYPE_STRING
))
415 vals
[i
] = atoi(blobmsg_get_string(cur2
));
419 in
->respawn_count
= 0;
420 in
->respawn_threshold
= vals
[0];
421 in
->respawn_timeout
= vals
[1];
422 in
->respawn_retry
= vals
[2];
424 if (tb
[INSTANCE_ATTR_TRIGGER
]) {
425 in
->trigger
= blob_memdup(tb
[INSTANCE_ATTR_TRIGGER
]);
428 trigger_add(in
->trigger
, in
);
431 if (tb
[INSTANCE_ATTR_WATCH
]) {
432 blobmsg_for_each_attr(cur2
, tb
[INSTANCE_ATTR_WATCH
], rem
) {
433 if (blobmsg_type(cur2
) != BLOBMSG_TYPE_STRING
)
435 DEBUG(3, "watch for %s\n", blobmsg_get_string(cur2
));
436 watch_add(blobmsg_get_string(cur2
), in
);
440 if ((cur
= tb
[INSTANCE_ATTR_NICE
])) {
441 in
->nice
= (int8_t) blobmsg_get_u32(cur
);
442 if (in
->nice
< -20 || in
->nice
> 20)
446 if (!instance_fill_array(&in
->env
, tb
[INSTANCE_ATTR_ENV
], NULL
, false))
449 if (!instance_fill_array(&in
->data
, tb
[INSTANCE_ATTR_DATA
], NULL
, false))
452 if (!instance_fill_array(&in
->netdev
, tb
[INSTANCE_ATTR_NETDEV
], instance_netdev_update
, true))
455 if (!instance_fill_array(&in
->file
, tb
[INSTANCE_ATTR_FILE
], instance_file_update
, true))
458 if (!instance_fill_array(&in
->limits
, tb
[INSTANCE_ATTR_LIMITS
], NULL
, false))
461 if (!instance_fill_array(&in
->errors
, tb
[INSTANCE_ATTR_ERROR
], NULL
, true))
468 instance_config_cleanup(struct service_instance
*in
)
470 blobmsg_list_free(&in
->env
);
471 blobmsg_list_free(&in
->data
);
472 blobmsg_list_free(&in
->netdev
);
473 blobmsg_list_free(&in
->file
);
474 blobmsg_list_free(&in
->limits
);
475 blobmsg_list_free(&in
->errors
);
479 instance_config_move(struct service_instance
*in
, struct service_instance
*in_src
)
481 instance_config_cleanup(in
);
482 blobmsg_list_move(&in
->env
, &in_src
->env
);
483 blobmsg_list_move(&in
->data
, &in_src
->data
);
484 blobmsg_list_move(&in
->netdev
, &in_src
->netdev
);
485 blobmsg_list_move(&in
->file
, &in_src
->file
);
486 blobmsg_list_move(&in
->limits
, &in_src
->limits
);
487 blobmsg_list_move(&in
->errors
, &in_src
->errors
);
488 in
->trigger
= in_src
->trigger
;
489 in
->command
= in_src
->command
;
490 in
->name
= in_src
->name
;
491 in
->node
.avl
.key
= in_src
->node
.avl
.key
;
494 in
->config
= in_src
->config
;
495 in_src
->config
= NULL
;
499 instance_update(struct service_instance
*in
, struct service_instance
*in_new
)
501 bool changed
= instance_config_changed(in
, in_new
);
502 bool running
= in
->proc
.pending
;
504 if (!changed
&& running
)
509 instance_config_move(in
, in_new
);
512 instance_restart(in
);
513 instance_config_move(in
, in_new
);
514 /* restart happens in the child callback handler */
520 instance_free(struct service_instance
*in
)
522 uloop_process_delete(&in
->proc
);
523 uloop_timeout_cancel(&in
->timeout
);
527 instance_config_cleanup(in
);
533 instance_init(struct service_instance
*in
, struct service
*s
, struct blob_attr
*config
)
535 config
= blob_memdup(config
);
537 in
->name
= blobmsg_name(config
);
539 in
->timeout
.cb
= instance_timeout
;
540 in
->proc
.cb
= instance_exit
;
542 blobmsg_list_init(&in
->netdev
, struct instance_netdev
, node
, instance_netdev_cmp
);
543 blobmsg_list_init(&in
->file
, struct instance_file
, node
, instance_file_cmp
);
544 blobmsg_list_simple_init(&in
->env
);
545 blobmsg_list_simple_init(&in
->data
);
546 blobmsg_list_simple_init(&in
->limits
);
547 blobmsg_list_simple_init(&in
->errors
);
548 in
->valid
= instance_config_parse(in
);
551 void instance_dump(struct blob_buf
*b
, struct service_instance
*in
, int verbose
)
555 i
= blobmsg_open_table(b
, in
->name
);
556 blobmsg_add_u8(b
, "running", in
->proc
.pending
);
557 if (in
->proc
.pending
)
558 blobmsg_add_u32(b
, "pid", in
->proc
.pid
);
559 blobmsg_add_blob(b
, in
->command
);
561 if (!avl_is_empty(&in
->errors
.avl
)) {
562 struct blobmsg_list_node
*var
;
563 void *e
= blobmsg_open_array(b
, "errors");
564 blobmsg_list_for_each(&in
->errors
, var
)
565 blobmsg_add_string(b
, NULL
, blobmsg_data(var
->data
));
566 blobmsg_close_table(b
, e
);
569 if (!avl_is_empty(&in
->env
.avl
)) {
570 struct blobmsg_list_node
*var
;
571 void *e
= blobmsg_open_table(b
, "env");
572 blobmsg_list_for_each(&in
->env
, var
)
573 blobmsg_add_string(b
, blobmsg_name(var
->data
), blobmsg_data(var
->data
));
574 blobmsg_close_table(b
, e
);
577 if (!avl_is_empty(&in
->limits
.avl
)) {
578 struct blobmsg_list_node
*var
;
579 void *e
= blobmsg_open_table(b
, "limits");
580 blobmsg_list_for_each(&in
->limits
, var
)
581 blobmsg_add_string(b
, blobmsg_name(var
->data
), blobmsg_data(var
->data
));
582 blobmsg_close_table(b
, e
);
586 void *r
= blobmsg_open_table(b
, "respawn");
587 blobmsg_add_u32(b
, "timeout", in
->respawn_timeout
);
588 blobmsg_add_u32(b
, "threshold", in
->respawn_threshold
);
589 blobmsg_add_u32(b
, "retry", in
->respawn_retry
);
590 blobmsg_close_table(b
, r
);
593 if (verbose
&& in
->trigger
)
594 blobmsg_add_blob(b
, in
->trigger
);
596 blobmsg_close_table(b
, i
);