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,
38 static const struct blobmsg_policy instance_attr[__INSTANCE_ATTR_MAX] = {
39 [INSTANCE_ATTR_COMMAND] = { "command", BLOBMSG_TYPE_ARRAY },
40 [INSTANCE_ATTR_ENV] = { "env", BLOBMSG_TYPE_TABLE },
41 [INSTANCE_ATTR_DATA] = { "data", BLOBMSG_TYPE_TABLE },
42 [INSTANCE_ATTR_NETDEV] = { "netdev", BLOBMSG_TYPE_ARRAY },
43 [INSTANCE_ATTR_FILE] = { "file", BLOBMSG_TYPE_ARRAY },
44 [INSTANCE_ATTR_NICE] = { "nice", BLOBMSG_TYPE_INT32 },
47 struct instance_netdev {
48 struct blobmsg_list_node node;
52 struct instance_file {
53 struct blobmsg_list_node node;
58 instance_run(struct service_instance *in)
60 struct blobmsg_list_node *var;
61 struct blob_attr *cur;
63 int argc = 1; /* NULL terminated */
67 setpriority(PRIO_PROCESS, 0, in->nice);
69 blobmsg_for_each_attr(cur, in->command, rem)
72 blobmsg_list_for_each(&in->env, var)
73 setenv(blobmsg_name(var->data), blobmsg_data(var->data), 1);
75 argv = alloca(sizeof(char *) * argc);
78 blobmsg_for_each_attr(cur, in->command, rem)
79 argv[argc++] = blobmsg_data(cur);
82 execvp(argv[0], argv);
87 instance_start(struct service_instance *in)
107 DEBUG(1, "Started instance %s::%s\n", in->srv->name, in->name);
109 uloop_process_add(&in->proc);
113 instance_timeout(struct uloop_timeout *t)
115 struct service_instance *in;
117 in = container_of(t, struct service_instance, timeout);
118 kill(in->proc.pid, SIGKILL);
119 uloop_process_delete(&in->proc);
120 in->proc.cb(&in->proc, -1);
124 instance_exit(struct uloop_process *p, int ret)
126 struct service_instance *in;
128 in = container_of(p, struct service_instance, proc);
129 LOG("Instance %s::%s exit with error code %d\n", in->srv->name, in->name, ret);
130 uloop_timeout_cancel(&in->timeout);
136 instance_stop(struct service_instance *in, bool restart)
138 if (!in->proc.pending)
141 kill(in->proc.pid, SIGTERM);
145 instance_config_changed(struct service_instance *in, struct service_instance *in_new)
150 if (!blob_attr_equal(in->command, in_new->command))
153 if (!blobmsg_list_equal(&in->env, &in_new->env))
156 if (!blobmsg_list_equal(&in->data, &in_new->data))
159 if (!blobmsg_list_equal(&in->netdev, &in_new->netdev))
162 if (!blobmsg_list_equal(&in->file, &in_new->file))
165 if (in->nice != in_new->nice)
172 instance_netdev_cmp(struct blobmsg_list_node *l1, struct blobmsg_list_node *l2)
174 struct instance_netdev *n1 = container_of(l1, struct instance_netdev, node);
175 struct instance_netdev *n2 = container_of(l2, struct instance_netdev, node);
177 return n1->ifindex == n2->ifindex;
181 instance_netdev_update(struct blobmsg_list_node *l)
183 struct instance_netdev *n = container_of(l, struct instance_netdev, node);
185 n->ifindex = if_nametoindex(n->node.avl.key);
189 instance_file_cmp(struct blobmsg_list_node *l1, struct blobmsg_list_node *l2)
191 struct instance_file *f1 = container_of(l1, struct instance_file, node);
192 struct instance_file *f2 = container_of(l2, struct instance_file, node);
194 return !memcmp(f1->md5, f2->md5, sizeof(f1->md5));
198 instance_file_update(struct blobmsg_list_node *l)
200 struct instance_file *f = container_of(l, struct instance_file, node);
205 memset(f->md5, 0, sizeof(f->md5));
207 fd = open(l->avl.key, O_RDONLY);
213 len = read(fd, buf, sizeof(buf));
223 md5_hash(buf, len, &md5);
226 md5_end(f->md5, &md5);
231 instance_fill_array(struct blobmsg_list *l, struct blob_attr *cur, blobmsg_update_cb cb, bool array)
233 struct blobmsg_list_node *node;
238 if (!blobmsg_check_attr_list(cur, BLOBMSG_TYPE_STRING))
241 blobmsg_list_fill(l, blobmsg_data(cur), blobmsg_data_len(cur), array);
243 blobmsg_list_for_each(l, node)
250 instance_config_parse(struct service_instance *in)
252 struct blob_attr *tb[__INSTANCE_ATTR_MAX];
253 struct blob_attr *cur, *cur2;
257 blobmsg_parse(instance_attr, __INSTANCE_ATTR_MAX, tb,
258 blobmsg_data(in->config), blobmsg_data_len(in->config));
260 cur = tb[INSTANCE_ATTR_COMMAND];
264 if (!blobmsg_check_attr_list(cur, BLOBMSG_TYPE_STRING))
267 blobmsg_for_each_attr(cur2, cur, rem) {
276 if ((cur = tb[INSTANCE_ATTR_NICE])) {
277 in->nice = (int8_t) blobmsg_get_u32(cur);
278 if (in->nice < -20 || in->nice > 20)
282 if (!instance_fill_array(&in->env, tb[INSTANCE_ATTR_ENV], NULL, false))
285 if (!instance_fill_array(&in->data, tb[INSTANCE_ATTR_DATA], NULL, false))
288 if (!instance_fill_array(&in->netdev, tb[INSTANCE_ATTR_NETDEV], instance_netdev_update, true))
291 if (!instance_fill_array(&in->file, tb[INSTANCE_ATTR_FILE], instance_file_update, true))
298 instance_config_cleanup(struct service_instance *in)
300 blobmsg_list_free(&in->env);
301 blobmsg_list_free(&in->data);
302 blobmsg_list_free(&in->netdev);
306 instance_config_move(struct service_instance *in, struct service_instance *in_src)
308 instance_config_cleanup(in);
309 blobmsg_list_move(&in->env, &in_src->env);
310 blobmsg_list_move(&in->data, &in_src->data);
311 blobmsg_list_move(&in->netdev, &in_src->netdev);
312 in->command = in_src->command;
313 in->name = in_src->name;
314 in->node.avl.key = in_src->node.avl.key;
317 in->config = in_src->config;
318 in_src->config = NULL;
322 instance_update(struct service_instance *in, struct service_instance *in_new)
324 bool changed = instance_config_changed(in, in_new);
330 instance_stop(in, true);
331 instance_config_move(in, in_new);
336 instance_free(struct service_instance *in)
338 uloop_process_delete(&in->proc);
339 uloop_timeout_cancel(&in->timeout);
340 instance_config_cleanup(in);
346 instance_init(struct service_instance *in, struct service *s, struct blob_attr *config)
348 config = blob_memdup(config);
350 in->name = blobmsg_name(config);
352 in->timeout.cb = instance_timeout;
353 in->proc.cb = instance_exit;
355 blobmsg_list_init(&in->netdev, struct instance_netdev, node, instance_netdev_cmp);
356 blobmsg_list_init(&in->file, struct instance_file, node, instance_file_cmp);
357 blobmsg_list_simple_init(&in->env);
358 blobmsg_list_simple_init(&in->data);
359 in->valid = instance_config_parse(in);
362 void instance_dump(struct blob_buf *b, struct service_instance *in)
366 i = blobmsg_open_table(b, in->name);
367 blobmsg_add_u8(b, "running", in->proc.pending);
368 if (in->proc.pending)
369 blobmsg_add_u32(b, "pid", in->proc.pid);
370 blobmsg_add_blob(b, in->command);
371 blobmsg_close_table(b, i);