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>
29 INSTANCE_ATTR_COMMAND
,
34 INSTANCE_ATTR_TRIGGER
,
35 INSTANCE_ATTR_RESPAWN
,
40 static const struct blobmsg_policy instance_attr
[__INSTANCE_ATTR_MAX
] = {
41 [INSTANCE_ATTR_COMMAND
] = { "command", BLOBMSG_TYPE_ARRAY
},
42 [INSTANCE_ATTR_ENV
] = { "env", BLOBMSG_TYPE_TABLE
},
43 [INSTANCE_ATTR_DATA
] = { "data", BLOBMSG_TYPE_TABLE
},
44 [INSTANCE_ATTR_NETDEV
] = { "netdev", BLOBMSG_TYPE_ARRAY
},
45 [INSTANCE_ATTR_FILE
] = { "file", BLOBMSG_TYPE_ARRAY
},
46 [INSTANCE_ATTR_TRIGGER
] = { "triggers", BLOBMSG_TYPE_ARRAY
},
47 [INSTANCE_ATTR_RESPAWN
] = { "respawn", BLOBMSG_TYPE_ARRAY
},
48 [INSTANCE_ATTR_NICE
] = { "nice", BLOBMSG_TYPE_INT32
},
51 struct instance_netdev
{
52 struct blobmsg_list_node node
;
56 struct instance_file
{
57 struct blobmsg_list_node node
;
62 instance_run(struct service_instance
*in
)
64 struct blobmsg_list_node
*var
;
65 struct blob_attr
*cur
;
67 int argc
= 1; /* NULL terminated */
71 setpriority(PRIO_PROCESS
, 0, in
->nice
);
73 blobmsg_for_each_attr(cur
, in
->command
, rem
)
76 blobmsg_list_for_each(&in
->env
, var
)
77 setenv(blobmsg_name(var
->data
), blobmsg_data(var
->data
), 1);
79 argv
= alloca(sizeof(char *) * argc
);
82 blobmsg_for_each_attr(cur
, in
->command
, rem
)
83 argv
[argc
++] = blobmsg_data(cur
);
86 fd
= open("/dev/null", O_RDWR
);
88 dup2(fd
, STDIN_FILENO
);
89 dup2(fd
, STDOUT_FILENO
);
90 dup2(fd
, STDERR_FILENO
);
91 if (fd
> STDERR_FILENO
)
94 execvp(argv
[0], argv
);
99 instance_start(struct service_instance
*in
)
103 if (in
->proc
.pending
)
107 in
->halt
= !in
->respawn
;
122 DEBUG(1, "Started instance %s::%s\n", in
->srv
->name
, in
->name
);
124 clock_gettime(CLOCK_MONOTONIC
, &in
->start
);
125 uloop_process_add(&in
->proc
);
129 instance_timeout(struct uloop_timeout
*t
)
131 struct service_instance
*in
;
133 in
= container_of(t
, struct service_instance
, timeout
);
135 if (!in
->halt
&& (in
->restart
|| in
->respawn
))
140 instance_exit(struct uloop_process
*p
, int ret
)
142 struct service_instance
*in
;
146 in
= container_of(p
, struct service_instance
, proc
);
148 clock_gettime(CLOCK_MONOTONIC
, &tp
);
149 runtime
= tp
.tv_sec
- in
->start
.tv_sec
;
151 DEBUG(1, "Instance %s::%s exit with error code %d after %ld seconds\n", in
->srv
->name
, in
->name
, ret
, runtime
);
155 uloop_timeout_cancel(&in
->timeout
);
158 } else if (in
->restart
) {
160 } else if (in
->respawn
) {
161 if (runtime
< in
->respawn_threshold
)
164 in
->respawn_count
= 0;
165 if (in
->respawn_count
> in
->respawn_retry
) {
166 LOG("Instance %s::%s s in a crash loop %d crashes, %ld seconds since last crash\n",
167 in
->srv
->name
, in
->name
, in
->respawn_count
, runtime
);
168 in
->restart
= in
->respawn
= 0;
171 uloop_timeout_set(&in
->timeout
, in
->respawn_timeout
* 1000);
177 instance_stop(struct service_instance
*in
)
179 if (!in
->proc
.pending
)
182 in
->restart
= in
->respawn
= false;
183 kill(in
->proc
.pid
, SIGTERM
);
187 instance_restart(struct service_instance
*in
)
189 if (!in
->proc
.pending
)
193 kill(in
->proc
.pid
, SIGTERM
);
197 instance_config_changed(struct service_instance
*in
, struct service_instance
*in_new
)
202 if (!blob_attr_equal(in
->command
, in_new
->command
))
205 if (!blobmsg_list_equal(&in
->env
, &in_new
->env
))
208 if (!blobmsg_list_equal(&in
->data
, &in_new
->data
))
211 if (!blobmsg_list_equal(&in
->netdev
, &in_new
->netdev
))
214 if (!blobmsg_list_equal(&in
->file
, &in_new
->file
))
217 if (in
->nice
!= in_new
->nice
)
224 instance_netdev_cmp(struct blobmsg_list_node
*l1
, struct blobmsg_list_node
*l2
)
226 struct instance_netdev
*n1
= container_of(l1
, struct instance_netdev
, node
);
227 struct instance_netdev
*n2
= container_of(l2
, struct instance_netdev
, node
);
229 return n1
->ifindex
== n2
->ifindex
;
233 instance_netdev_update(struct blobmsg_list_node
*l
)
235 struct instance_netdev
*n
= container_of(l
, struct instance_netdev
, node
);
237 n
->ifindex
= if_nametoindex(n
->node
.avl
.key
);
241 instance_file_cmp(struct blobmsg_list_node
*l1
, struct blobmsg_list_node
*l2
)
243 struct instance_file
*f1
= container_of(l1
, struct instance_file
, node
);
244 struct instance_file
*f2
= container_of(l2
, struct instance_file
, node
);
246 return !memcmp(f1
->md5
, f2
->md5
, sizeof(f1
->md5
));
250 instance_file_update(struct blobmsg_list_node
*l
)
252 struct instance_file
*f
= container_of(l
, struct instance_file
, node
);
257 memset(f
->md5
, 0, sizeof(f
->md5
));
259 fd
= open(l
->avl
.key
, O_RDONLY
);
265 len
= read(fd
, buf
, sizeof(buf
));
275 md5_hash(buf
, len
, &md5
);
278 md5_end(f
->md5
, &md5
);
283 instance_fill_array(struct blobmsg_list
*l
, struct blob_attr
*cur
, blobmsg_update_cb cb
, bool array
)
285 struct blobmsg_list_node
*node
;
290 if (!blobmsg_check_attr_list(cur
, BLOBMSG_TYPE_STRING
))
293 blobmsg_list_fill(l
, blobmsg_data(cur
), blobmsg_data_len(cur
), array
);
295 blobmsg_list_for_each(l
, node
)
302 instance_config_parse(struct service_instance
*in
)
304 struct blob_attr
*tb
[__INSTANCE_ATTR_MAX
];
305 struct blob_attr
*cur
, *cur2
;
309 blobmsg_parse(instance_attr
, __INSTANCE_ATTR_MAX
, tb
,
310 blobmsg_data(in
->config
), blobmsg_data_len(in
->config
));
312 cur
= tb
[INSTANCE_ATTR_COMMAND
];
316 if (!blobmsg_check_attr_list(cur
, BLOBMSG_TYPE_STRING
))
319 blobmsg_for_each_attr(cur2
, cur
, rem
) {
328 if (tb
[INSTANCE_ATTR_RESPAWN
]) {
330 uint32_t vals
[3] = { 3600, 5, 5};
332 blobmsg_for_each_attr(cur2
, tb
[INSTANCE_ATTR_RESPAWN
], rem
) {
333 if ((i
>= 3) && (blobmsg_type(cur2
) == BLOBMSG_TYPE_STRING
))
335 vals
[i
] = atoi(blobmsg_get_string(cur2
));
339 in
->respawn_count
= 0;
340 in
->respawn_threshold
= vals
[0];
341 in
->respawn_timeout
= vals
[1];
342 in
->respawn_retry
= vals
[2];
344 if (tb
[INSTANCE_ATTR_TRIGGER
]) {
345 in
->trigger
= malloc(blob_pad_len(tb
[INSTANCE_ATTR_TRIGGER
]));
348 memcpy(in
->trigger
, tb
[INSTANCE_ATTR_TRIGGER
], blob_pad_len(tb
[INSTANCE_ATTR_TRIGGER
]));
349 trigger_add(in
->trigger
, in
);
352 if ((cur
= tb
[INSTANCE_ATTR_NICE
])) {
353 in
->nice
= (int8_t) blobmsg_get_u32(cur
);
354 if (in
->nice
< -20 || in
->nice
> 20)
358 if (!instance_fill_array(&in
->env
, tb
[INSTANCE_ATTR_ENV
], NULL
, false))
361 if (!instance_fill_array(&in
->data
, tb
[INSTANCE_ATTR_DATA
], NULL
, false))
364 if (!instance_fill_array(&in
->netdev
, tb
[INSTANCE_ATTR_NETDEV
], instance_netdev_update
, true))
367 if (!instance_fill_array(&in
->file
, tb
[INSTANCE_ATTR_FILE
], instance_file_update
, true))
374 instance_config_cleanup(struct service_instance
*in
)
376 blobmsg_list_free(&in
->env
);
377 blobmsg_list_free(&in
->data
);
378 blobmsg_list_free(&in
->netdev
);
382 instance_config_move(struct service_instance
*in
, struct service_instance
*in_src
)
384 instance_config_cleanup(in
);
385 blobmsg_list_move(&in
->env
, &in_src
->env
);
386 blobmsg_list_move(&in
->data
, &in_src
->data
);
387 blobmsg_list_move(&in
->netdev
, &in_src
->netdev
);
388 in
->trigger
= in_src
->trigger
;
389 in
->command
= in_src
->command
;
390 in
->name
= in_src
->name
;
391 in
->node
.avl
.key
= in_src
->node
.avl
.key
;
394 in
->config
= in_src
->config
;
395 in_src
->config
= NULL
;
399 instance_update(struct service_instance
*in
, struct service_instance
*in_new
)
401 bool changed
= instance_config_changed(in
, in_new
);
402 bool running
= in
->proc
.pending
;
404 if (!changed
&& running
)
409 instance_config_move(in
, in_new
);
412 instance_restart(in
);
413 instance_config_move(in
, in_new
);
414 /* restart happens in the child callback handler */
420 instance_free(struct service_instance
*in
)
422 uloop_process_delete(&in
->proc
);
423 uloop_timeout_cancel(&in
->timeout
);
426 instance_config_cleanup(in
);
432 instance_init(struct service_instance
*in
, struct service
*s
, struct blob_attr
*config
)
434 config
= blob_memdup(config
);
436 in
->name
= blobmsg_name(config
);
438 in
->timeout
.cb
= instance_timeout
;
439 in
->proc
.cb
= instance_exit
;
441 blobmsg_list_init(&in
->netdev
, struct instance_netdev
, node
, instance_netdev_cmp
);
442 blobmsg_list_init(&in
->file
, struct instance_file
, node
, instance_file_cmp
);
443 blobmsg_list_simple_init(&in
->env
);
444 blobmsg_list_simple_init(&in
->data
);
445 in
->valid
= instance_config_parse(in
);
448 void instance_dump(struct blob_buf
*b
, struct service_instance
*in
, int verbose
)
453 i
= blobmsg_open_table(b
, in
->name
);
454 blobmsg_add_u8(b
, "running", in
->proc
.pending
);
455 if (in
->proc
.pending
)
456 blobmsg_add_u32(b
, "pid", in
->proc
.pid
);
457 blobmsg_add_blob(b
, in
->command
);
459 if (!avl_is_empty(&in
->env
.avl
)) {
460 struct blobmsg_list_node
*var
;
461 void *e
= blobmsg_open_table(b
, "env");
462 blobmsg_list_for_each(&in
->env
, var
)
463 blobmsg_add_string(b
, blobmsg_name(var
->data
), blobmsg_data(var
->data
));
464 blobmsg_close_table(b
, e
);
468 void *r
= blobmsg_open_table(b
, "respawn");
469 blobmsg_add_u32(b
, "timeout", in
->respawn_timeout
);
470 blobmsg_add_u32(b
, "threshold", in
->respawn_threshold
);
471 blobmsg_add_u32(b
, "retry", in
->respawn_retry
);
472 blobmsg_close_table(b
, r
);
475 if (verbose
&& in
->trigger
)
476 blobmsg_add_blob(b
, in
->trigger
);
477 if (!measure_process(in
->proc
.pid
, &pi
)) {
481 clock_gettime(CLOCK_MONOTONIC
, &tp
);
482 uptime
= tp
.tv_sec
- in
->start
.tv_sec
;
484 blobmsg_add_u8(b
, "ppid", pi
.ppid
);
485 blobmsg_add_u16(b
, "uid", pi
.uid
);
486 blobmsg_add_u32(b
, "fdcount", pi
.fdcount
);
487 blobmsg_add_u32(b
, "vmsize", pi
.vmsize
);
488 blobmsg_add_u32(b
, "uptime", uptime
);
490 blobmsg_close_table(b
, i
);