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,
43 static const struct blobmsg_policy instance_attr[__INSTANCE_ATTR_MAX] = {
44 [INSTANCE_ATTR_COMMAND] = { "command", BLOBMSG_TYPE_ARRAY },
45 [INSTANCE_ATTR_ENV] = { "env", BLOBMSG_TYPE_TABLE },
46 [INSTANCE_ATTR_DATA] = { "data", BLOBMSG_TYPE_TABLE },
47 [INSTANCE_ATTR_NETDEV] = { "netdev", BLOBMSG_TYPE_ARRAY },
48 [INSTANCE_ATTR_FILE] = { "file", BLOBMSG_TYPE_ARRAY },
49 [INSTANCE_ATTR_TRIGGER] = { "triggers", BLOBMSG_TYPE_ARRAY },
50 [INSTANCE_ATTR_RESPAWN] = { "respawn", BLOBMSG_TYPE_ARRAY },
51 [INSTANCE_ATTR_NICE] = { "nice", BLOBMSG_TYPE_INT32 },
54 struct instance_netdev {
55 struct blobmsg_list_node node;
59 struct instance_file {
60 struct blobmsg_list_node node;
65 instance_run(struct service_instance *in)
67 struct blobmsg_list_node *var;
68 struct blob_attr *cur;
70 int argc = 1; /* NULL terminated */
74 setpriority(PRIO_PROCESS, 0, in->nice);
76 blobmsg_for_each_attr(cur, in->command, rem)
79 blobmsg_list_for_each(&in->env, var)
80 setenv(blobmsg_name(var->data), blobmsg_data(var->data), 1);
82 argv = alloca(sizeof(char *) * argc);
85 blobmsg_for_each_attr(cur, in->command, rem)
86 argv[argc++] = blobmsg_data(cur);
89 fd = open("/dev/null", O_RDWR);
91 dup2(fd, STDIN_FILENO);
92 dup2(fd, STDOUT_FILENO);
93 dup2(fd, STDERR_FILENO);
94 if (fd > STDERR_FILENO)
97 execvp(argv[0], argv);
102 instance_start(struct service_instance *in)
106 if (in->proc.pending)
110 in->halt = !in->respawn;
125 DEBUG(2, "Started instance %s::%s\n", in->srv->name, in->name);
127 clock_gettime(CLOCK_MONOTONIC, &in->start);
128 uloop_process_add(&in->proc);
132 instance_timeout(struct uloop_timeout *t)
134 struct service_instance *in;
136 in = container_of(t, struct service_instance, timeout);
138 if (!in->halt && (in->restart || in->respawn))
143 instance_exit(struct uloop_process *p, int ret)
145 struct service_instance *in;
149 in = container_of(p, struct service_instance, proc);
151 clock_gettime(CLOCK_MONOTONIC, &tp);
152 runtime = tp.tv_sec - in->start.tv_sec;
154 DEBUG(2, "Instance %s::%s exit with error code %d after %ld seconds\n", in->srv->name, in->name, ret, runtime);
158 uloop_timeout_cancel(&in->timeout);
161 } else if (in->restart) {
163 } else if (in->respawn) {
164 if (runtime < in->respawn_threshold)
167 in->respawn_count = 0;
168 if (in->respawn_count > in->respawn_retry && in->respawn_retry > 0 ) {
169 LOG("Instance %s::%s s in a crash loop %d crashes, %ld seconds since last crash\n",
170 in->srv->name, in->name, in->respawn_count, runtime);
171 in->restart = in->respawn = 0;
174 uloop_timeout_set(&in->timeout, in->respawn_timeout * 1000);
180 instance_stop(struct service_instance *in)
182 if (!in->proc.pending)
185 in->restart = in->respawn = false;
186 kill(in->proc.pid, SIGTERM);
190 instance_restart(struct service_instance *in)
192 if (!in->proc.pending)
196 kill(in->proc.pid, SIGTERM);
200 instance_config_changed(struct service_instance *in, struct service_instance *in_new)
205 if (!blob_attr_equal(in->command, in_new->command))
208 if (!blobmsg_list_equal(&in->env, &in_new->env))
211 if (!blobmsg_list_equal(&in->data, &in_new->data))
214 if (!blobmsg_list_equal(&in->netdev, &in_new->netdev))
217 if (!blobmsg_list_equal(&in->file, &in_new->file))
220 if (in->nice != in_new->nice)
227 instance_netdev_cmp(struct blobmsg_list_node *l1, struct blobmsg_list_node *l2)
229 struct instance_netdev *n1 = container_of(l1, struct instance_netdev, node);
230 struct instance_netdev *n2 = container_of(l2, struct instance_netdev, node);
232 return n1->ifindex == n2->ifindex;
236 instance_netdev_update(struct blobmsg_list_node *l)
238 struct instance_netdev *n = container_of(l, struct instance_netdev, node);
240 n->ifindex = if_nametoindex(n->node.avl.key);
244 instance_file_cmp(struct blobmsg_list_node *l1, struct blobmsg_list_node *l2)
246 struct instance_file *f1 = container_of(l1, struct instance_file, node);
247 struct instance_file *f2 = container_of(l2, struct instance_file, node);
249 return !memcmp(f1->md5, f2->md5, sizeof(f1->md5));
253 instance_file_update(struct blobmsg_list_node *l)
255 struct instance_file *f = container_of(l, struct instance_file, node);
260 memset(f->md5, 0, sizeof(f->md5));
262 fd = open(l->avl.key, O_RDONLY);
268 len = read(fd, buf, sizeof(buf));
278 md5_hash(buf, len, &md5);
281 md5_end(f->md5, &md5);
286 instance_fill_array(struct blobmsg_list *l, struct blob_attr *cur, blobmsg_update_cb cb, bool array)
288 struct blobmsg_list_node *node;
293 if (!blobmsg_check_attr_list(cur, BLOBMSG_TYPE_STRING))
296 blobmsg_list_fill(l, blobmsg_data(cur), blobmsg_data_len(cur), array);
298 blobmsg_list_for_each(l, node)
305 instance_config_parse(struct service_instance *in)
307 struct blob_attr *tb[__INSTANCE_ATTR_MAX];
308 struct blob_attr *cur, *cur2;
312 blobmsg_parse(instance_attr, __INSTANCE_ATTR_MAX, tb,
313 blobmsg_data(in->config), blobmsg_data_len(in->config));
315 cur = tb[INSTANCE_ATTR_COMMAND];
319 if (!blobmsg_check_attr_list(cur, BLOBMSG_TYPE_STRING))
322 blobmsg_for_each_attr(cur2, cur, rem) {
331 if (tb[INSTANCE_ATTR_RESPAWN]) {
333 uint32_t vals[3] = { 3600, 5, 5};
335 blobmsg_for_each_attr(cur2, tb[INSTANCE_ATTR_RESPAWN], rem) {
336 if ((i >= 3) && (blobmsg_type(cur2) == BLOBMSG_TYPE_STRING))
338 vals[i] = atoi(blobmsg_get_string(cur2));
342 in->respawn_count = 0;
343 in->respawn_threshold = vals[0];
344 in->respawn_timeout = vals[1];
345 in->respawn_retry = vals[2];
347 if (tb[INSTANCE_ATTR_TRIGGER]) {
348 in->trigger = malloc(blob_pad_len(tb[INSTANCE_ATTR_TRIGGER]));
351 memcpy(in->trigger, tb[INSTANCE_ATTR_TRIGGER], blob_pad_len(tb[INSTANCE_ATTR_TRIGGER]));
352 trigger_add(in->trigger, in);
355 if ((cur = tb[INSTANCE_ATTR_NICE])) {
356 in->nice = (int8_t) blobmsg_get_u32(cur);
357 if (in->nice < -20 || in->nice > 20)
361 if (!instance_fill_array(&in->env, tb[INSTANCE_ATTR_ENV], NULL, false))
364 if (!instance_fill_array(&in->data, tb[INSTANCE_ATTR_DATA], NULL, false))
367 if (!instance_fill_array(&in->netdev, tb[INSTANCE_ATTR_NETDEV], instance_netdev_update, true))
370 if (!instance_fill_array(&in->file, tb[INSTANCE_ATTR_FILE], instance_file_update, true))
377 instance_config_cleanup(struct service_instance *in)
379 blobmsg_list_free(&in->env);
380 blobmsg_list_free(&in->data);
381 blobmsg_list_free(&in->netdev);
385 instance_config_move(struct service_instance *in, struct service_instance *in_src)
387 instance_config_cleanup(in);
388 blobmsg_list_move(&in->env, &in_src->env);
389 blobmsg_list_move(&in->data, &in_src->data);
390 blobmsg_list_move(&in->netdev, &in_src->netdev);
391 in->trigger = in_src->trigger;
392 in->command = in_src->command;
393 in->name = in_src->name;
394 in->node.avl.key = in_src->node.avl.key;
397 in->config = in_src->config;
398 in_src->config = NULL;
402 instance_update(struct service_instance *in, struct service_instance *in_new)
404 bool changed = instance_config_changed(in, in_new);
405 bool running = in->proc.pending;
407 if (!changed && running)
412 instance_config_move(in, in_new);
415 instance_restart(in);
416 instance_config_move(in, in_new);
417 /* restart happens in the child callback handler */
423 instance_free(struct service_instance *in)
425 uloop_process_delete(&in->proc);
426 uloop_timeout_cancel(&in->timeout);
429 instance_config_cleanup(in);
435 instance_init(struct service_instance *in, struct service *s, struct blob_attr *config)
437 config = blob_memdup(config);
439 in->name = blobmsg_name(config);
441 in->timeout.cb = instance_timeout;
442 in->proc.cb = instance_exit;
444 blobmsg_list_init(&in->netdev, struct instance_netdev, node, instance_netdev_cmp);
445 blobmsg_list_init(&in->file, struct instance_file, node, instance_file_cmp);
446 blobmsg_list_simple_init(&in->env);
447 blobmsg_list_simple_init(&in->data);
448 in->valid = instance_config_parse(in);
451 void instance_dump(struct blob_buf *b, struct service_instance *in, int verbose)
455 i = blobmsg_open_table(b, in->name);
456 blobmsg_add_u8(b, "running", in->proc.pending);
457 if (in->proc.pending)
458 blobmsg_add_u32(b, "pid", in->proc.pid);
459 blobmsg_add_blob(b, in->command);
461 if (!avl_is_empty(&in->env.avl)) {
462 struct blobmsg_list_node *var;
463 void *e = blobmsg_open_table(b, "env");
464 blobmsg_list_for_each(&in->env, var)
465 blobmsg_add_string(b, blobmsg_name(var->data), blobmsg_data(var->data));
466 blobmsg_close_table(b, e);
470 void *r = blobmsg_open_table(b, "respawn");
471 blobmsg_add_u32(b, "timeout", in->respawn_timeout);
472 blobmsg_add_u32(b, "threshold", in->respawn_threshold);
473 blobmsg_add_u32(b, "retry", in->respawn_retry);
474 blobmsg_close_table(b, r);
477 if (verbose && in->trigger)
478 blobmsg_add_blob(b, in->trigger);
480 blobmsg_close_table(b, i);