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,
39 static const struct blobmsg_policy instance_attr[__INSTANCE_ATTR_MAX] = {
40 [INSTANCE_ATTR_COMMAND] = { "command", BLOBMSG_TYPE_ARRAY },
41 [INSTANCE_ATTR_ENV] = { "env", BLOBMSG_TYPE_TABLE },
42 [INSTANCE_ATTR_DATA] = { "data", BLOBMSG_TYPE_TABLE },
43 [INSTANCE_ATTR_NETDEV] = { "netdev", BLOBMSG_TYPE_ARRAY },
44 [INSTANCE_ATTR_FILE] = { "file", BLOBMSG_TYPE_ARRAY },
45 [INSTANCE_ATTR_TRIGGER] = { "triggers", BLOBMSG_TYPE_ARRAY },
46 [INSTANCE_ATTR_NICE] = { "nice", BLOBMSG_TYPE_INT32 },
49 struct instance_netdev {
50 struct blobmsg_list_node node;
54 struct instance_file {
55 struct blobmsg_list_node node;
60 instance_run(struct service_instance *in)
62 struct blobmsg_list_node *var;
63 struct blob_attr *cur;
65 int argc = 1; /* NULL terminated */
69 setpriority(PRIO_PROCESS, 0, in->nice);
71 blobmsg_for_each_attr(cur, in->command, rem)
74 blobmsg_list_for_each(&in->env, var)
75 setenv(blobmsg_name(var->data), blobmsg_data(var->data), 1);
77 argv = alloca(sizeof(char *) * argc);
80 blobmsg_for_each_attr(cur, in->command, rem)
81 argv[argc++] = blobmsg_data(cur);
84 fd = open("/dev/null", O_RDWR);
86 dup2(fd, STDIN_FILENO);
87 dup2(fd, STDOUT_FILENO);
88 dup2(fd, STDERR_FILENO);
89 if (fd > STDERR_FILENO)
92 execvp(argv[0], argv);
97 instance_start(struct service_instance *in)
101 if (in->proc.pending)
118 DEBUG(1, "Started instance %s::%s\n", in->srv->name, in->name);
120 uloop_process_add(&in->proc);
124 instance_timeout(struct uloop_timeout *t)
126 struct service_instance *in;
128 in = container_of(t, struct service_instance, timeout);
129 kill(in->proc.pid, SIGKILL);
130 uloop_process_delete(&in->proc);
131 in->proc.cb(&in->proc, -1);
135 instance_exit(struct uloop_process *p, int ret)
137 struct service_instance *in;
139 in = container_of(p, struct service_instance, proc);
140 DEBUG(1, "Instance %s::%s exit with error code %d\n", in->srv->name, in->name, ret);
141 uloop_timeout_cancel(&in->timeout);
147 instance_stop(struct service_instance *in, bool restart)
149 if (!in->proc.pending)
152 kill(in->proc.pid, SIGTERM);
156 instance_config_changed(struct service_instance *in, struct service_instance *in_new)
161 if (!blob_attr_equal(in->command, in_new->command))
164 if (!blobmsg_list_equal(&in->env, &in_new->env))
167 if (!blobmsg_list_equal(&in->data, &in_new->data))
170 if (!blobmsg_list_equal(&in->netdev, &in_new->netdev))
173 if (!blobmsg_list_equal(&in->file, &in_new->file))
176 if (in->nice != in_new->nice)
183 instance_netdev_cmp(struct blobmsg_list_node *l1, struct blobmsg_list_node *l2)
185 struct instance_netdev *n1 = container_of(l1, struct instance_netdev, node);
186 struct instance_netdev *n2 = container_of(l2, struct instance_netdev, node);
188 return n1->ifindex == n2->ifindex;
192 instance_netdev_update(struct blobmsg_list_node *l)
194 struct instance_netdev *n = container_of(l, struct instance_netdev, node);
196 n->ifindex = if_nametoindex(n->node.avl.key);
200 instance_file_cmp(struct blobmsg_list_node *l1, struct blobmsg_list_node *l2)
202 struct instance_file *f1 = container_of(l1, struct instance_file, node);
203 struct instance_file *f2 = container_of(l2, struct instance_file, node);
205 return !memcmp(f1->md5, f2->md5, sizeof(f1->md5));
209 instance_file_update(struct blobmsg_list_node *l)
211 struct instance_file *f = container_of(l, struct instance_file, node);
216 memset(f->md5, 0, sizeof(f->md5));
218 fd = open(l->avl.key, O_RDONLY);
224 len = read(fd, buf, sizeof(buf));
234 md5_hash(buf, len, &md5);
237 md5_end(f->md5, &md5);
242 instance_fill_array(struct blobmsg_list *l, struct blob_attr *cur, blobmsg_update_cb cb, bool array)
244 struct blobmsg_list_node *node;
249 if (!blobmsg_check_attr_list(cur, BLOBMSG_TYPE_STRING))
252 blobmsg_list_fill(l, blobmsg_data(cur), blobmsg_data_len(cur), array);
254 blobmsg_list_for_each(l, node)
261 instance_config_parse(struct service_instance *in)
263 struct blob_attr *tb[__INSTANCE_ATTR_MAX];
264 struct blob_attr *cur, *cur2;
268 blobmsg_parse(instance_attr, __INSTANCE_ATTR_MAX, tb,
269 blobmsg_data(in->config), blobmsg_data_len(in->config));
271 cur = tb[INSTANCE_ATTR_COMMAND];
275 if (!blobmsg_check_attr_list(cur, BLOBMSG_TYPE_STRING))
278 blobmsg_for_each_attr(cur2, cur, rem) {
286 in->trigger = tb[INSTANCE_ATTR_TRIGGER];
289 trigger_add(in->trigger, in);
291 if ((cur = tb[INSTANCE_ATTR_NICE])) {
292 in->nice = (int8_t) blobmsg_get_u32(cur);
293 if (in->nice < -20 || in->nice > 20)
297 if (!instance_fill_array(&in->env, tb[INSTANCE_ATTR_ENV], NULL, false))
300 if (!instance_fill_array(&in->data, tb[INSTANCE_ATTR_DATA], NULL, false))
303 if (!instance_fill_array(&in->netdev, tb[INSTANCE_ATTR_NETDEV], instance_netdev_update, true))
306 if (!instance_fill_array(&in->file, tb[INSTANCE_ATTR_FILE], instance_file_update, true))
313 instance_config_cleanup(struct service_instance *in)
315 blobmsg_list_free(&in->env);
316 blobmsg_list_free(&in->data);
317 blobmsg_list_free(&in->netdev);
321 instance_config_move(struct service_instance *in, struct service_instance *in_src)
323 instance_config_cleanup(in);
324 blobmsg_list_move(&in->env, &in_src->env);
325 blobmsg_list_move(&in->data, &in_src->data);
326 blobmsg_list_move(&in->netdev, &in_src->netdev);
327 in->trigger = in_src->trigger;
328 in->command = in_src->command;
329 in->name = in_src->name;
330 in->node.avl.key = in_src->node.avl.key;
333 in->config = in_src->config;
334 in_src->config = NULL;
338 instance_update(struct service_instance *in, struct service_instance *in_new)
340 bool changed = instance_config_changed(in, in_new);
341 bool running = in->proc.pending;
343 if (!changed && running)
348 instance_config_move(in, in_new);
352 instance_stop(in, true);
353 instance_config_move(in, in_new);
359 instance_free(struct service_instance *in)
361 uloop_process_delete(&in->proc);
362 uloop_timeout_cancel(&in->timeout);
364 instance_config_cleanup(in);
370 instance_init(struct service_instance *in, struct service *s, struct blob_attr *config)
372 config = blob_memdup(config);
374 in->name = blobmsg_name(config);
376 in->timeout.cb = instance_timeout;
377 in->proc.cb = instance_exit;
379 blobmsg_list_init(&in->netdev, struct instance_netdev, node, instance_netdev_cmp);
380 blobmsg_list_init(&in->file, struct instance_file, node, instance_file_cmp);
381 blobmsg_list_simple_init(&in->env);
382 blobmsg_list_simple_init(&in->data);
383 in->valid = instance_config_parse(in);
386 void instance_dump(struct blob_buf *b, struct service_instance *in, int verbose)
390 i = blobmsg_open_table(b, in->name);
391 blobmsg_add_u8(b, "running", in->proc.pending);
392 if (in->proc.pending)
393 blobmsg_add_u32(b, "pid", in->proc.pid);
394 blobmsg_add_blob(b, in->command);
395 if (verbose && in->trigger)
396 blobmsg_add_blob(b, in->trigger);
397 blobmsg_close_table(b, i);