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
,
45 static const struct blobmsg_policy instance_attr
[__INSTANCE_ATTR_MAX
] = {
46 [INSTANCE_ATTR_COMMAND
] = { "command", BLOBMSG_TYPE_ARRAY
},
47 [INSTANCE_ATTR_ENV
] = { "env", BLOBMSG_TYPE_TABLE
},
48 [INSTANCE_ATTR_DATA
] = { "data", BLOBMSG_TYPE_TABLE
},
49 [INSTANCE_ATTR_NETDEV
] = { "netdev", BLOBMSG_TYPE_ARRAY
},
50 [INSTANCE_ATTR_FILE
] = { "file", BLOBMSG_TYPE_ARRAY
},
51 [INSTANCE_ATTR_TRIGGER
] = { "triggers", BLOBMSG_TYPE_ARRAY
},
52 [INSTANCE_ATTR_RESPAWN
] = { "respawn", BLOBMSG_TYPE_ARRAY
},
53 [INSTANCE_ATTR_NICE
] = { "nice", BLOBMSG_TYPE_INT32
},
54 [INSTANCE_ATTR_LIMITS
] = { "limits", BLOBMSG_TYPE_TABLE
},
55 [INSTANCE_ATTR_WATCH
] = { "watch", BLOBMSG_TYPE_ARRAY
},
58 struct instance_netdev
{
59 struct blobmsg_list_node node
;
63 struct instance_file
{
64 struct blobmsg_list_node node
;
73 static const struct rlimit_name rlimit_names
[] = {
75 { "core", RLIMIT_CORE
},
76 { "cpu", RLIMIT_CPU
},
77 { "data", RLIMIT_DATA
},
78 { "fsize", RLIMIT_FSIZE
},
79 { "memlock", RLIMIT_MEMLOCK
},
80 { "msgqueue", RLIMIT_MSGQUEUE
},
81 { "nice", RLIMIT_NICE
},
82 { "nofile", RLIMIT_NOFILE
},
83 { "nproc", RLIMIT_NPROC
},
84 { "rss", RLIMIT_RSS
},
85 { "rtprio", RLIMIT_RTPRIO
},
86 { "sigpending", RLIMIT_SIGPENDING
},
87 { "stack", RLIMIT_STACK
},
92 instance_limits(const char *limit
, const char *value
)
96 unsigned long cur
, max
;
98 for (i
= 0; rlimit_names
[i
].name
!= NULL
; i
++) {
99 if (strcmp(rlimit_names
[i
].name
, limit
))
101 if (!strcmp(value
, "unlimited")) {
102 rlim
.rlim_cur
= RLIM_INFINITY
;
103 rlim
.rlim_max
= RLIM_INFINITY
;
105 if (getrlimit(rlimit_names
[i
].resource
, &rlim
))
111 if (sscanf(value
, "%lu %lu", &cur
, &max
) < 1)
118 setrlimit(rlimit_names
[i
].resource
, &rlim
);
124 instance_run(struct service_instance
*in
)
126 struct blobmsg_list_node
*var
;
127 struct blob_attr
*cur
;
129 int argc
= 1; /* NULL terminated */
133 setpriority(PRIO_PROCESS
, 0, in
->nice
);
135 blobmsg_for_each_attr(cur
, in
->command
, rem
)
138 blobmsg_list_for_each(&in
->env
, var
)
139 setenv(blobmsg_name(var
->data
), blobmsg_data(var
->data
), 1);
141 blobmsg_list_for_each(&in
->limits
, var
)
142 instance_limits(blobmsg_name(var
->data
), blobmsg_data(var
->data
));
144 argv
= alloca(sizeof(char *) * argc
);
147 blobmsg_for_each_attr(cur
, in
->command
, rem
)
148 argv
[argc
++] = blobmsg_data(cur
);
151 fd
= open("/dev/null", O_RDWR
);
153 dup2(fd
, STDIN_FILENO
);
154 dup2(fd
, STDOUT_FILENO
);
155 dup2(fd
, STDERR_FILENO
);
156 if (fd
> STDERR_FILENO
)
159 execvp(argv
[0], argv
);
164 instance_start(struct service_instance
*in
)
168 if (in
->proc
.pending
)
172 in
->halt
= !in
->respawn
;
187 DEBUG(2, "Started instance %s::%s\n", in
->srv
->name
, in
->name
);
189 clock_gettime(CLOCK_MONOTONIC
, &in
->start
);
190 uloop_process_add(&in
->proc
);
191 service_event("instance.start", in
->srv
->name
, in
->name
);
195 instance_timeout(struct uloop_timeout
*t
)
197 struct service_instance
*in
;
199 in
= container_of(t
, struct service_instance
, timeout
);
201 if (!in
->halt
&& (in
->restart
|| in
->respawn
))
206 instance_exit(struct uloop_process
*p
, int ret
)
208 struct service_instance
*in
;
212 in
= container_of(p
, struct service_instance
, proc
);
214 clock_gettime(CLOCK_MONOTONIC
, &tp
);
215 runtime
= tp
.tv_sec
- in
->start
.tv_sec
;
217 DEBUG(2, "Instance %s::%s exit with error code %d after %ld seconds\n", in
->srv
->name
, in
->name
, ret
, runtime
);
221 uloop_timeout_cancel(&in
->timeout
);
224 } else if (in
->restart
) {
226 } else if (in
->respawn
) {
227 if (runtime
< in
->respawn_threshold
)
230 in
->respawn_count
= 0;
231 if (in
->respawn_count
> in
->respawn_retry
&& in
->respawn_retry
> 0 ) {
232 LOG("Instance %s::%s s in a crash loop %d crashes, %ld seconds since last crash\n",
233 in
->srv
->name
, in
->name
, in
->respawn_count
, runtime
);
234 in
->restart
= in
->respawn
= 0;
237 uloop_timeout_set(&in
->timeout
, in
->respawn_timeout
* 1000);
240 service_event("instance.stop", in
->srv
->name
, in
->name
);
244 instance_stop(struct service_instance
*in
)
246 if (!in
->proc
.pending
)
249 in
->restart
= in
->respawn
= false;
250 kill(in
->proc
.pid
, SIGTERM
);
254 instance_restart(struct service_instance
*in
)
256 if (!in
->proc
.pending
)
260 kill(in
->proc
.pid
, SIGTERM
);
264 instance_config_changed(struct service_instance
*in
, struct service_instance
*in_new
)
269 if (!blob_attr_equal(in
->command
, in_new
->command
))
272 if (!blobmsg_list_equal(&in
->env
, &in_new
->env
))
275 if (!blobmsg_list_equal(&in
->data
, &in_new
->data
))
278 if (!blobmsg_list_equal(&in
->netdev
, &in_new
->netdev
))
281 if (!blobmsg_list_equal(&in
->file
, &in_new
->file
))
284 if (in
->nice
!= in_new
->nice
)
287 if (!blobmsg_list_equal(&in
->limits
, &in_new
->limits
))
294 instance_netdev_cmp(struct blobmsg_list_node
*l1
, struct blobmsg_list_node
*l2
)
296 struct instance_netdev
*n1
= container_of(l1
, struct instance_netdev
, node
);
297 struct instance_netdev
*n2
= container_of(l2
, struct instance_netdev
, node
);
299 return n1
->ifindex
== n2
->ifindex
;
303 instance_netdev_update(struct blobmsg_list_node
*l
)
305 struct instance_netdev
*n
= container_of(l
, struct instance_netdev
, node
);
307 n
->ifindex
= if_nametoindex(n
->node
.avl
.key
);
311 instance_file_cmp(struct blobmsg_list_node
*l1
, struct blobmsg_list_node
*l2
)
313 struct instance_file
*f1
= container_of(l1
, struct instance_file
, node
);
314 struct instance_file
*f2
= container_of(l2
, struct instance_file
, node
);
316 return !memcmp(f1
->md5
, f2
->md5
, sizeof(f1
->md5
));
320 instance_file_update(struct blobmsg_list_node
*l
)
322 struct instance_file
*f
= container_of(l
, struct instance_file
, node
);
327 memset(f
->md5
, 0, sizeof(f
->md5
));
329 fd
= open(l
->avl
.key
, O_RDONLY
);
335 len
= read(fd
, buf
, sizeof(buf
));
345 md5_hash(buf
, len
, &md5
);
348 md5_end(f
->md5
, &md5
);
353 instance_fill_array(struct blobmsg_list
*l
, struct blob_attr
*cur
, blobmsg_update_cb cb
, bool array
)
355 struct blobmsg_list_node
*node
;
360 if (!blobmsg_check_attr_list(cur
, BLOBMSG_TYPE_STRING
))
363 blobmsg_list_fill(l
, blobmsg_data(cur
), blobmsg_data_len(cur
), array
);
365 blobmsg_list_for_each(l
, node
)
372 instance_config_parse(struct service_instance
*in
)
374 struct blob_attr
*tb
[__INSTANCE_ATTR_MAX
];
375 struct blob_attr
*cur
, *cur2
;
379 blobmsg_parse(instance_attr
, __INSTANCE_ATTR_MAX
, tb
,
380 blobmsg_data(in
->config
), blobmsg_data_len(in
->config
));
382 cur
= tb
[INSTANCE_ATTR_COMMAND
];
386 if (!blobmsg_check_attr_list(cur
, BLOBMSG_TYPE_STRING
))
389 blobmsg_for_each_attr(cur2
, cur
, rem
) {
398 if (tb
[INSTANCE_ATTR_RESPAWN
]) {
400 uint32_t vals
[3] = { 3600, 5, 5};
402 blobmsg_for_each_attr(cur2
, tb
[INSTANCE_ATTR_RESPAWN
], rem
) {
403 if ((i
>= 3) && (blobmsg_type(cur2
) == BLOBMSG_TYPE_STRING
))
405 vals
[i
] = atoi(blobmsg_get_string(cur2
));
409 in
->respawn_count
= 0;
410 in
->respawn_threshold
= vals
[0];
411 in
->respawn_timeout
= vals
[1];
412 in
->respawn_retry
= vals
[2];
414 if (tb
[INSTANCE_ATTR_TRIGGER
]) {
415 in
->trigger
= blob_memdup(tb
[INSTANCE_ATTR_TRIGGER
]);
418 trigger_add(in
->trigger
, in
);
421 if (tb
[INSTANCE_ATTR_WATCH
]) {
422 blobmsg_for_each_attr(cur2
, tb
[INSTANCE_ATTR_WATCH
], rem
) {
423 if (blobmsg_type(cur2
) != BLOBMSG_TYPE_STRING
)
425 DEBUG(3, "watch for %s\n", blobmsg_get_string(cur2
));
426 watch_add(blobmsg_get_string(cur2
), in
);
430 if ((cur
= tb
[INSTANCE_ATTR_NICE
])) {
431 in
->nice
= (int8_t) blobmsg_get_u32(cur
);
432 if (in
->nice
< -20 || in
->nice
> 20)
436 if (!instance_fill_array(&in
->env
, tb
[INSTANCE_ATTR_ENV
], NULL
, false))
439 if (!instance_fill_array(&in
->data
, tb
[INSTANCE_ATTR_DATA
], NULL
, false))
442 if (!instance_fill_array(&in
->netdev
, tb
[INSTANCE_ATTR_NETDEV
], instance_netdev_update
, true))
445 if (!instance_fill_array(&in
->file
, tb
[INSTANCE_ATTR_FILE
], instance_file_update
, true))
448 if (!instance_fill_array(&in
->limits
, tb
[INSTANCE_ATTR_LIMITS
], NULL
, false))
455 instance_config_cleanup(struct service_instance
*in
)
457 blobmsg_list_free(&in
->env
);
458 blobmsg_list_free(&in
->data
);
459 blobmsg_list_free(&in
->netdev
);
460 blobmsg_list_free(&in
->file
);
461 blobmsg_list_free(&in
->limits
);
465 instance_config_move(struct service_instance
*in
, struct service_instance
*in_src
)
467 instance_config_cleanup(in
);
468 blobmsg_list_move(&in
->env
, &in_src
->env
);
469 blobmsg_list_move(&in
->data
, &in_src
->data
);
470 blobmsg_list_move(&in
->netdev
, &in_src
->netdev
);
471 blobmsg_list_move(&in
->file
, &in_src
->file
);
472 blobmsg_list_move(&in
->limits
, &in_src
->limits
);
473 in
->trigger
= in_src
->trigger
;
474 in
->command
= in_src
->command
;
475 in
->name
= in_src
->name
;
476 in
->node
.avl
.key
= in_src
->node
.avl
.key
;
479 in
->config
= in_src
->config
;
480 in_src
->config
= NULL
;
484 instance_update(struct service_instance
*in
, struct service_instance
*in_new
)
486 bool changed
= instance_config_changed(in
, in_new
);
487 bool running
= in
->proc
.pending
;
489 if (!changed
&& running
)
494 instance_config_move(in
, in_new
);
497 instance_restart(in
);
498 instance_config_move(in
, in_new
);
499 /* restart happens in the child callback handler */
505 instance_free(struct service_instance
*in
)
507 uloop_process_delete(&in
->proc
);
508 uloop_timeout_cancel(&in
->timeout
);
512 instance_config_cleanup(in
);
518 instance_init(struct service_instance
*in
, struct service
*s
, struct blob_attr
*config
)
520 config
= blob_memdup(config
);
522 in
->name
= blobmsg_name(config
);
524 in
->timeout
.cb
= instance_timeout
;
525 in
->proc
.cb
= instance_exit
;
527 blobmsg_list_init(&in
->netdev
, struct instance_netdev
, node
, instance_netdev_cmp
);
528 blobmsg_list_init(&in
->file
, struct instance_file
, node
, instance_file_cmp
);
529 blobmsg_list_simple_init(&in
->env
);
530 blobmsg_list_simple_init(&in
->data
);
531 blobmsg_list_simple_init(&in
->limits
);
532 in
->valid
= instance_config_parse(in
);
535 void instance_dump(struct blob_buf
*b
, struct service_instance
*in
, int verbose
)
539 i
= blobmsg_open_table(b
, in
->name
);
540 blobmsg_add_u8(b
, "running", in
->proc
.pending
);
541 if (in
->proc
.pending
)
542 blobmsg_add_u32(b
, "pid", in
->proc
.pid
);
543 blobmsg_add_blob(b
, in
->command
);
545 if (!avl_is_empty(&in
->env
.avl
)) {
546 struct blobmsg_list_node
*var
;
547 void *e
= blobmsg_open_table(b
, "env");
548 blobmsg_list_for_each(&in
->env
, var
)
549 blobmsg_add_string(b
, blobmsg_name(var
->data
), blobmsg_data(var
->data
));
550 blobmsg_close_table(b
, e
);
553 if (!avl_is_empty(&in
->limits
.avl
)) {
554 struct blobmsg_list_node
*var
;
555 void *e
= blobmsg_open_table(b
, "limits");
556 blobmsg_list_for_each(&in
->limits
, var
)
557 blobmsg_add_string(b
, blobmsg_name(var
->data
), blobmsg_data(var
->data
));
558 blobmsg_close_table(b
, e
);
562 void *r
= blobmsg_open_table(b
, "respawn");
563 blobmsg_add_u32(b
, "timeout", in
->respawn_timeout
);
564 blobmsg_add_u32(b
, "threshold", in
->respawn_threshold
);
565 blobmsg_add_u32(b
, "retry", in
->respawn_retry
);
566 blobmsg_close_table(b
, r
);
569 if (verbose
&& in
->trigger
)
570 blobmsg_add_blob(b
, in
->trigger
);
572 blobmsg_close_table(b
, i
);