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);
152 uloop_timeout_cancel(&in->timeout);
155 } else if (in->restart) {
157 } else if (in->respawn) {
158 if (runtime < RESPAWN_ERROR)
161 in->respawn_count = 0;
162 if (in->respawn_count > 5)
163 DEBUG(1, "Instance %s::%s s in a crash loop %d crashes, %ld seconds since last crash\n",
164 in->srv->name, in->name, in->respawn_count, runtime);
165 uloop_timeout_set(&in->timeout, 5000);
170 instance_stop(struct service_instance *in)
172 if (!in->proc.pending)
175 in->restart = in->respawn = false;
176 kill(in->proc.pid, SIGTERM);
180 instance_restart(struct service_instance *in)
182 if (!in->proc.pending)
186 kill(in->proc.pid, SIGTERM);
190 instance_config_changed(struct service_instance *in, struct service_instance *in_new)
195 if (!blob_attr_equal(in->command, in_new->command))
198 if (!blobmsg_list_equal(&in->env, &in_new->env))
201 if (!blobmsg_list_equal(&in->data, &in_new->data))
204 if (!blobmsg_list_equal(&in->netdev, &in_new->netdev))
207 if (!blobmsg_list_equal(&in->file, &in_new->file))
210 if (in->nice != in_new->nice)
217 instance_netdev_cmp(struct blobmsg_list_node *l1, struct blobmsg_list_node *l2)
219 struct instance_netdev *n1 = container_of(l1, struct instance_netdev, node);
220 struct instance_netdev *n2 = container_of(l2, struct instance_netdev, node);
222 return n1->ifindex == n2->ifindex;
226 instance_netdev_update(struct blobmsg_list_node *l)
228 struct instance_netdev *n = container_of(l, struct instance_netdev, node);
230 n->ifindex = if_nametoindex(n->node.avl.key);
234 instance_file_cmp(struct blobmsg_list_node *l1, struct blobmsg_list_node *l2)
236 struct instance_file *f1 = container_of(l1, struct instance_file, node);
237 struct instance_file *f2 = container_of(l2, struct instance_file, node);
239 return !memcmp(f1->md5, f2->md5, sizeof(f1->md5));
243 instance_file_update(struct blobmsg_list_node *l)
245 struct instance_file *f = container_of(l, struct instance_file, node);
250 memset(f->md5, 0, sizeof(f->md5));
252 fd = open(l->avl.key, O_RDONLY);
258 len = read(fd, buf, sizeof(buf));
268 md5_hash(buf, len, &md5);
271 md5_end(f->md5, &md5);
276 instance_fill_array(struct blobmsg_list *l, struct blob_attr *cur, blobmsg_update_cb cb, bool array)
278 struct blobmsg_list_node *node;
283 if (!blobmsg_check_attr_list(cur, BLOBMSG_TYPE_STRING))
286 blobmsg_list_fill(l, blobmsg_data(cur), blobmsg_data_len(cur), array);
288 blobmsg_list_for_each(l, node)
295 instance_config_parse(struct service_instance *in)
297 struct blob_attr *tb[__INSTANCE_ATTR_MAX];
298 struct blob_attr *cur, *cur2;
302 blobmsg_parse(instance_attr, __INSTANCE_ATTR_MAX, tb,
303 blobmsg_data(in->config), blobmsg_data_len(in->config));
305 cur = tb[INSTANCE_ATTR_COMMAND];
309 if (!blobmsg_check_attr_list(cur, BLOBMSG_TYPE_STRING))
312 blobmsg_for_each_attr(cur2, cur, rem) {
320 in->trigger = tb[INSTANCE_ATTR_TRIGGER];
323 trigger_add(in->trigger, in);
325 if ((cur = tb[INSTANCE_ATTR_NICE])) {
326 in->nice = (int8_t) blobmsg_get_u32(cur);
327 if (in->nice < -20 || in->nice > 20)
331 if (!instance_fill_array(&in->env, tb[INSTANCE_ATTR_ENV], NULL, false))
334 if (!instance_fill_array(&in->data, tb[INSTANCE_ATTR_DATA], NULL, false))
337 if (!instance_fill_array(&in->netdev, tb[INSTANCE_ATTR_NETDEV], instance_netdev_update, true))
340 if (!instance_fill_array(&in->file, tb[INSTANCE_ATTR_FILE], instance_file_update, true))
347 instance_config_cleanup(struct service_instance *in)
349 blobmsg_list_free(&in->env);
350 blobmsg_list_free(&in->data);
351 blobmsg_list_free(&in->netdev);
355 instance_config_move(struct service_instance *in, struct service_instance *in_src)
357 instance_config_cleanup(in);
358 blobmsg_list_move(&in->env, &in_src->env);
359 blobmsg_list_move(&in->data, &in_src->data);
360 blobmsg_list_move(&in->netdev, &in_src->netdev);
361 in->trigger = in_src->trigger;
362 in->command = in_src->command;
363 in->name = in_src->name;
364 in->node.avl.key = in_src->node.avl.key;
367 in->config = in_src->config;
368 in_src->config = NULL;
372 instance_update(struct service_instance *in, struct service_instance *in_new)
374 bool changed = instance_config_changed(in, in_new);
375 bool running = in->proc.pending;
377 if (!changed && running)
382 instance_config_move(in, in_new);
385 instance_restart(in);
386 instance_config_move(in, in_new);
387 /* restart happens in the child callback handler */
393 instance_free(struct service_instance *in)
395 uloop_process_delete(&in->proc);
396 uloop_timeout_cancel(&in->timeout);
398 instance_config_cleanup(in);
404 instance_init(struct service_instance *in, struct service *s, struct blob_attr *config)
406 config = blob_memdup(config);
408 in->name = blobmsg_name(config);
410 in->timeout.cb = instance_timeout;
411 in->proc.cb = instance_exit;
413 in->respawn_count = 0;
415 blobmsg_list_init(&in->netdev, struct instance_netdev, node, instance_netdev_cmp);
416 blobmsg_list_init(&in->file, struct instance_file, node, instance_file_cmp);
417 blobmsg_list_simple_init(&in->env);
418 blobmsg_list_simple_init(&in->data);
419 in->valid = instance_config_parse(in);
422 void instance_dump(struct blob_buf *b, struct service_instance *in, int verbose)
427 i = blobmsg_open_table(b, in->name);
428 blobmsg_add_u8(b, "running", in->proc.pending);
429 if (in->proc.pending)
430 blobmsg_add_u32(b, "pid", in->proc.pid);
431 blobmsg_add_blob(b, in->command);
432 if (verbose && in->trigger)
433 blobmsg_add_blob(b, in->trigger);
434 if (!measure_process(in->proc.pid, &pi)) {
438 clock_gettime(CLOCK_MONOTONIC, &tp);
439 uptime = tp.tv_sec - in->start.tv_sec;
441 blobmsg_add_u8(b, "ppid", pi.ppid);
442 blobmsg_add_u16(b, "uid", pi.uid);
443 blobmsg_add_u32(b, "fdcount", pi.fdcount);
444 blobmsg_add_u32(b, "vmsize", pi.vmsize);
445 blobmsg_add_u32(b, "uptime", uptime);
447 blobmsg_close_table(b, i);