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);
87 execvp(argv[0], argv);
92 instance_start(struct service_instance *in)
112 DEBUG(1, "Started instance %s::%s\n", in->srv->name, in->name);
114 uloop_process_add(&in->proc);
118 instance_timeout(struct uloop_timeout *t)
120 struct service_instance *in;
122 in = container_of(t, struct service_instance, timeout);
123 kill(in->proc.pid, SIGKILL);
124 uloop_process_delete(&in->proc);
125 in->proc.cb(&in->proc, -1);
129 instance_exit(struct uloop_process *p, int ret)
131 struct service_instance *in;
133 in = container_of(p, struct service_instance, proc);
134 DEBUG(1, "Instance %s::%s exit with error code %d\n", in->srv->name, in->name, ret);
135 uloop_timeout_cancel(&in->timeout);
141 instance_stop(struct service_instance *in, bool restart)
143 if (!in->proc.pending)
146 kill(in->proc.pid, SIGTERM);
150 instance_config_changed(struct service_instance *in, struct service_instance *in_new)
155 if (!blob_attr_equal(in->command, in_new->command))
158 if (!blobmsg_list_equal(&in->env, &in_new->env))
161 if (!blobmsg_list_equal(&in->data, &in_new->data))
164 if (!blobmsg_list_equal(&in->netdev, &in_new->netdev))
167 if (!blobmsg_list_equal(&in->file, &in_new->file))
170 if (in->nice != in_new->nice)
177 instance_netdev_cmp(struct blobmsg_list_node *l1, struct blobmsg_list_node *l2)
179 struct instance_netdev *n1 = container_of(l1, struct instance_netdev, node);
180 struct instance_netdev *n2 = container_of(l2, struct instance_netdev, node);
182 return n1->ifindex == n2->ifindex;
186 instance_netdev_update(struct blobmsg_list_node *l)
188 struct instance_netdev *n = container_of(l, struct instance_netdev, node);
190 n->ifindex = if_nametoindex(n->node.avl.key);
194 instance_file_cmp(struct blobmsg_list_node *l1, struct blobmsg_list_node *l2)
196 struct instance_file *f1 = container_of(l1, struct instance_file, node);
197 struct instance_file *f2 = container_of(l2, struct instance_file, node);
199 return !memcmp(f1->md5, f2->md5, sizeof(f1->md5));
203 instance_file_update(struct blobmsg_list_node *l)
205 struct instance_file *f = container_of(l, struct instance_file, node);
210 memset(f->md5, 0, sizeof(f->md5));
212 fd = open(l->avl.key, O_RDONLY);
218 len = read(fd, buf, sizeof(buf));
228 md5_hash(buf, len, &md5);
231 md5_end(f->md5, &md5);
236 instance_fill_array(struct blobmsg_list *l, struct blob_attr *cur, blobmsg_update_cb cb, bool array)
238 struct blobmsg_list_node *node;
243 if (!blobmsg_check_attr_list(cur, BLOBMSG_TYPE_STRING))
246 blobmsg_list_fill(l, blobmsg_data(cur), blobmsg_data_len(cur), array);
248 blobmsg_list_for_each(l, node)
255 instance_config_parse(struct service_instance *in)
257 struct blob_attr *tb[__INSTANCE_ATTR_MAX];
258 struct blob_attr *cur, *cur2;
262 blobmsg_parse(instance_attr, __INSTANCE_ATTR_MAX, tb,
263 blobmsg_data(in->config), blobmsg_data_len(in->config));
265 cur = tb[INSTANCE_ATTR_COMMAND];
269 if (!blobmsg_check_attr_list(cur, BLOBMSG_TYPE_STRING))
272 blobmsg_for_each_attr(cur2, cur, rem) {
280 in->trigger = tb[INSTANCE_ATTR_TRIGGER];
283 trigger_add(in->trigger, in);
285 if ((cur = tb[INSTANCE_ATTR_NICE])) {
286 in->nice = (int8_t) blobmsg_get_u32(cur);
287 if (in->nice < -20 || in->nice > 20)
291 if (!instance_fill_array(&in->env, tb[INSTANCE_ATTR_ENV], NULL, false))
294 if (!instance_fill_array(&in->data, tb[INSTANCE_ATTR_DATA], NULL, false))
297 if (!instance_fill_array(&in->netdev, tb[INSTANCE_ATTR_NETDEV], instance_netdev_update, true))
300 if (!instance_fill_array(&in->file, tb[INSTANCE_ATTR_FILE], instance_file_update, true))
307 instance_config_cleanup(struct service_instance *in)
309 blobmsg_list_free(&in->env);
310 blobmsg_list_free(&in->data);
311 blobmsg_list_free(&in->netdev);
315 instance_config_move(struct service_instance *in, struct service_instance *in_src)
317 instance_config_cleanup(in);
318 blobmsg_list_move(&in->env, &in_src->env);
319 blobmsg_list_move(&in->data, &in_src->data);
320 blobmsg_list_move(&in->netdev, &in_src->netdev);
321 in->trigger = in_src->trigger;
322 in->command = in_src->command;
323 in->name = in_src->name;
324 in->node.avl.key = in_src->node.avl.key;
327 in->config = in_src->config;
328 in_src->config = NULL;
332 instance_update(struct service_instance *in, struct service_instance *in_new)
334 bool changed = instance_config_changed(in, in_new);
335 bool running = in->proc.pending;
337 if (!changed && running)
342 instance_config_move(in, in_new);
346 instance_stop(in, true);
347 instance_config_move(in, in_new);
353 instance_free(struct service_instance *in)
355 uloop_process_delete(&in->proc);
356 uloop_timeout_cancel(&in->timeout);
358 instance_config_cleanup(in);
364 instance_init(struct service_instance *in, struct service *s, struct blob_attr *config)
366 config = blob_memdup(config);
368 in->name = blobmsg_name(config);
370 in->timeout.cb = instance_timeout;
371 in->proc.cb = instance_exit;
373 blobmsg_list_init(&in->netdev, struct instance_netdev, node, instance_netdev_cmp);
374 blobmsg_list_init(&in->file, struct instance_file, node, instance_file_cmp);
375 blobmsg_list_simple_init(&in->env);
376 blobmsg_list_simple_init(&in->data);
377 in->valid = instance_config_parse(in);
380 void instance_dump(struct blob_buf *b, struct service_instance *in, int verbose)
384 i = blobmsg_open_table(b, in->name);
385 blobmsg_add_u8(b, "running", in->proc.pending);
386 if (in->proc.pending)
387 blobmsg_add_u32(b, "pid", in->proc.pid);
388 blobmsg_add_blob(b, in->command);
389 if (verbose && in->trigger)
390 blobmsg_add_blob(b, in->trigger);
391 blobmsg_close_table(b, i);