service/service.c

   1 /*
   2  * Copyright (C) 2013 Felix Fietkau <nbd@openwrt.org>
   3  * Copyright (C) 2013 John Crispin <blogic@openwrt.org>
   4  *
   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
   8  *
   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.
  13  */
  14
  15 #include <libubox/blobmsg_json.h>
  16 #include <libubox/avl-cmp.h>
  17
  18 #include "../procd.h"
  19
  20 #include "service.h"
  21 #include "instance.h"
  22
  23 #include "../rcS.h"
  24
  25 struct avl_tree services;
  26 static struct blob_buf b;
  27
  28 static void
  29 service_instance_add(struct service *s, struct blob_attr *attr)
  30 {
  31         struct service_instance *in;
  32
  33         if (blobmsg_type(attr) != BLOBMSG_TYPE_TABLE)
  34                 return;
  35
  36         in = calloc(1, sizeof(*in));
  37         if (!in)
  38                 return;
  39
  40         instance_init(in, s, attr);
  41         vlist_add(&s->instances, &in->node, (void *) in->name);
  42 }
  43
  44 static void
  45 service_instance_update(struct vlist_tree *tree, struct vlist_node *node_new,
  46                         struct vlist_node *node_old)
  47 {
  48         struct service_instance *in_o = NULL, *in_n = NULL;
  49
  50         if (node_old)
  51                 in_o = container_of(node_old, struct service_instance, node);
  52
  53         if (node_new)
  54                 in_n = container_of(node_new, struct service_instance, node);
  55
  56         if (in_o && in_n) {
  57                 DEBUG(2, "Update instance %s::%s\n", in_o->srv->name, in_o->name);
  58                 instance_update(in_o, in_n);
  59                 instance_free(in_n);
  60         } else if (in_o) {
  61                 DEBUG(2, "Free instance %s::%s\n", in_o->srv->name, in_o->name);
  62                 instance_stop(in_o);
  63                 instance_free(in_o);
  64         } else if (in_n) {
  65                 DEBUG(2, "Create instance %s::%s\n", in_n->srv->name, in_n->name);
  66                 instance_start(in_n);
  67         }
  68 }
  69
  70 static struct service *
  71 service_alloc(const char *name)
  72 {
  73         struct service *s;
  74         char *new_name;
  75
  76         s = calloc_a(sizeof(*s), &new_name, strlen(name) + 1);
  77         strcpy(new_name, name);
  78
  79         vlist_init(&s->instances, avl_strcmp, service_instance_update);
  80         s->instances.keep_old = true;
  81         s->name = new_name;
  82         s->avl.key = s->name;
  83         INIT_LIST_HEAD(&s->validators);
  84
  85         return s;
  86 }
  87
  88 enum {
  89         SERVICE_SET_NAME,
  90         SERVICE_SET_SCRIPT,
  91         SERVICE_SET_INSTANCES,
  92         SERVICE_SET_TRIGGER,
  93         SERVICE_SET_VALIDATE,
  94         __SERVICE_SET_MAX
  95 };
  96
  97 static const struct blobmsg_policy service_set_attrs[__SERVICE_SET_MAX] = {
  98         [SERVICE_SET_NAME] = { "name", BLOBMSG_TYPE_STRING },
  99         [SERVICE_SET_SCRIPT] = { "script", BLOBMSG_TYPE_STRING },
 100         [SERVICE_SET_INSTANCES] = { "instances", BLOBMSG_TYPE_TABLE },
 101         [SERVICE_SET_TRIGGER] = { "triggers", BLOBMSG_TYPE_ARRAY },
 102         [SERVICE_SET_VALIDATE] = { "validate", BLOBMSG_TYPE_ARRAY },
 103 };
 104
 105 static int
 106 service_update(struct service *s, struct blob_attr *config, struct blob_attr **tb, bool add)
 107 {
 108         struct blob_attr *cur;
 109         int rem;
 110
 111         if (s->trigger) {
 112                 trigger_del(s);
 113                 free(s->trigger);
 114                 s->trigger = NULL;
 115         }
 116
 117         service_validate_del(s);
 118
 119         if (tb[SERVICE_SET_TRIGGER] && blobmsg_data_len(tb[SERVICE_SET_TRIGGER])) {
 120                 s->trigger = malloc(blob_pad_len(tb[SERVICE_SET_TRIGGER]));
 121                 if (!s->trigger)
 122                         return -1;
 123                 memcpy(s->trigger, tb[SERVICE_SET_TRIGGER], blob_pad_len(tb[SERVICE_SET_TRIGGER]));
 124                 trigger_add(s->trigger, s);
 125         }
 126
 127         if (tb[SERVICE_SET_VALIDATE] && blobmsg_data_len(tb[SERVICE_SET_VALIDATE])) {
 128                 blobmsg_for_each_attr(cur, tb[SERVICE_SET_VALIDATE], rem)
 129                         service_validate_add(s, cur);
 130         }
 131
 132         if (tb[SERVICE_SET_INSTANCES]) {
 133                 if (!add)
 134                         vlist_update(&s->instances);
 135                 blobmsg_for_each_attr(cur, tb[SERVICE_SET_INSTANCES], rem) {
 136                         service_instance_add(s, cur);
 137                 }
 138                 if (!add)
 139                         vlist_flush(&s->instances);
 140         }
 141
 142         rcnow(s->name, "running");
 143
 144         return 0;
 145 }
 146
 147 static void
 148 service_delete(struct service *s)
 149 {
 150         vlist_flush_all(&s->instances);
 151         avl_delete(&services, &s->avl);
 152         trigger_del(s);
 153         s->trigger = NULL;
 154         free(s->trigger);
 155         free(s);
 156         service_validate_del(s);
 157 }
 158
 159 enum {
 160         SERVICE_ATTR_NAME,
 161         __SERVICE_ATTR_MAX,
 162 };
 163
 164 static const struct blobmsg_policy service_attrs[__SERVICE_ATTR_MAX] = {
 165         [SERVICE_ATTR_NAME] = { "name", BLOBMSG_TYPE_STRING },
 166 };
 167
 168 enum {
 169         SERVICE_DEL_ATTR_NAME,
 170         SERVICE_DEL_ATTR_INSTANCE,
 171         __SERVICE_DEL_ATTR_MAX,
 172 };
 173
 174 static const struct blobmsg_policy service_del_attrs[__SERVICE_DEL_ATTR_MAX] = {
 175         [SERVICE_DEL_ATTR_NAME] = { "name", BLOBMSG_TYPE_STRING },
 176         [SERVICE_DEL_ATTR_INSTANCE] = { "instance", BLOBMSG_TYPE_STRING },
 177 };
 178
 179 enum {
 180         SERVICE_LIST_ATTR_VERBOSE,
 181         __SERVICE_LIST_ATTR_MAX,
 182 };
 183
 184 static const struct blobmsg_policy service_list_attrs[__SERVICE_LIST_ATTR_MAX] = {
 185         [SERVICE_LIST_ATTR_VERBOSE] = { "verbose", BLOBMSG_TYPE_BOOL },
 186 };
 187
 188 enum {
 189         EVENT_TYPE,
 190         EVENT_DATA,
 191         __EVENT_MAX
 192 };
 193
 194 static const struct blobmsg_policy event_policy[__EVENT_MAX] = {
 195         [EVENT_TYPE] = { .name = "type", .type = BLOBMSG_TYPE_STRING },
 196         [EVENT_DATA] = { .name = "data", .type = BLOBMSG_TYPE_TABLE },
 197 };
 198
 199 enum {
 200         VALIDATE_PACKAGE,
 201         VALIDATE_TYPE,
 202         VALIDATE_SERVICE,
 203         __VALIDATE_MAX
 204 };
 205
 206 static const struct blobmsg_policy validate_policy[__VALIDATE_MAX] = {
 207         [VALIDATE_PACKAGE] = { .name = "package", .type = BLOBMSG_TYPE_STRING },
 208         [VALIDATE_TYPE] = { .name = "type", .type = BLOBMSG_TYPE_STRING },
 209         [VALIDATE_SERVICE] = { .name = "service", .type = BLOBMSG_TYPE_STRING },
 210 };
 211
 212 static int
 213 service_handle_set(struct ubus_context *ctx, struct ubus_object *obj,
 214                    struct ubus_request_data *req, const char *method,
 215                    struct blob_attr *msg)
 216 {
 217         struct blob_attr *tb[__SERVICE_SET_MAX], *cur;
 218         struct service *s = NULL;
 219         const char *name;
 220         int ret = UBUS_STATUS_INVALID_ARGUMENT;
 221         bool add = !strcmp(method, "add");
 222
 223         blobmsg_parse(service_set_attrs, __SERVICE_SET_MAX, tb, blob_data(msg), blob_len(msg));
 224         cur = tb[SERVICE_ATTR_NAME];
 225         if (!cur)
 226                 goto free;
 227
 228         name = blobmsg_data(cur);
 229
 230         s = avl_find_element(&services, name, s, avl);
 231         if (s) {
 232                 DEBUG(2, "Update service %s\n", name);
 233                 return service_update(s, msg, tb, add);
 234         }
 235
 236         DEBUG(2, "Create service %s\n", name);
 237         s = service_alloc(name);
 238         if (!s)
 239                 return UBUS_STATUS_UNKNOWN_ERROR;
 240
 241         ret = service_update(s, msg, tb, add);
 242         if (ret)
 243                 goto free;
 244
 245         avl_insert(&services, &s->avl);
 246
 247         return 0;
 248
 249 free:
 250         free(msg);
 251         return ret;
 252 }
 253
 254 static void
 255 service_dump(struct service *s, int verbose)
 256 {
 257         struct service_instance *in;
 258         void *c, *i;
 259
 260         c = blobmsg_open_table(&b, s->name);
 261
 262         if (avl_is_empty(&s->instances.avl)) {
 263                 blobmsg_close_table(&b, c);
 264                 return;
 265         }
 266
 267         i = blobmsg_open_table(&b, "instances");
 268         vlist_for_each_element(&s->instances, in, node)
 269                 instance_dump(&b, in, verbose);
 270         blobmsg_close_table(&b, i);
 271         if (verbose && s->trigger)
 272                 blobmsg_add_blob(&b, s->trigger);
 273         if (verbose && !list_empty(&s->validators))
 274                 service_validate_dump(&b, s);
 275         blobmsg_close_table(&b, c);
 276 }
 277
 278 static int
 279 service_handle_list(struct ubus_context *ctx, struct ubus_object *obj,
 280                     struct ubus_request_data *req, const char *method,
 281                     struct blob_attr *msg)
 282 {
 283         struct blob_attr *tb[__SERVICE_LIST_ATTR_MAX];
 284         struct service *s;
 285         int verbose = 0;
 286
 287         blobmsg_parse(service_list_attrs, __SERVICE_LIST_ATTR_MAX, tb, blob_data(msg), blob_len(msg));
 288
 289         if (tb[SERVICE_LIST_ATTR_VERBOSE] && blobmsg_get_bool(tb[SERVICE_LIST_ATTR_VERBOSE]))
 290                 verbose = 1;
 291
 292         blob_buf_init(&b, 0);
 293         avl_for_each_element(&services, s, avl)
 294                 service_dump(s, verbose);
 295
 296         ubus_send_reply(ctx, req, b.head);
 297
 298         return 0;
 299 }
 300
 301 static int
 302 service_handle_delete(struct ubus_context *ctx, struct ubus_object *obj,
 303                     struct ubus_request_data *req, const char *method,
 304                     struct blob_attr *msg)
 305 {
 306         struct blob_attr *tb[__SERVICE_DEL_ATTR_MAX], *cur;
 307         struct service *s;
 308         struct service_instance *in;
 309
 310         blobmsg_parse(service_del_attrs, __SERVICE_DEL_ATTR_MAX, tb, blob_data(msg), blob_len(msg));
 311
 312         cur = tb[SERVICE_DEL_ATTR_NAME];
 313         if (!cur)
 314                 return UBUS_STATUS_NOT_FOUND;
 315
 316         s = avl_find_element(&services, blobmsg_data(cur), s, avl);
 317         if (!s)
 318                 return UBUS_STATUS_NOT_FOUND;
 319
 320         cur = tb[SERVICE_DEL_ATTR_INSTANCE];
 321         if (!cur) {
 322                 service_delete(s);
 323                 return 0;
 324         }
 325
 326         in = vlist_find(&s->instances, blobmsg_data(cur), in, node);
 327         if (!in) {
 328                 ERROR("instance %s not found\n", (char *) blobmsg_data(cur));
 329                 return UBUS_STATUS_NOT_FOUND;
 330         }
 331
 332         vlist_delete(&s->instances, &in->node);
 333
 334         return 0;
 335 }
 336
 337 static int
 338 service_handle_update(struct ubus_context *ctx, struct ubus_object *obj,
 339                       struct ubus_request_data *req, const char *method,
 340                       struct blob_attr *msg)
 341 {
 342         struct blob_attr *tb[__SERVICE_ATTR_MAX], *cur;
 343         struct service *s;
 344
 345         blobmsg_parse(service_attrs, __SERVICE_ATTR_MAX, tb, blob_data(msg), blob_len(msg));
 346
 347         cur = tb[SERVICE_ATTR_NAME];
 348         if (!cur)
 349                 return UBUS_STATUS_INVALID_ARGUMENT;
 350
 351         s = avl_find_element(&services, blobmsg_data(cur), s, avl);
 352         if (!s)
 353                 return UBUS_STATUS_NOT_FOUND;
 354
 355         if (!strcmp(method, "update_start"))
 356                 vlist_update(&s->instances);
 357         else
 358                 vlist_flush(&s->instances);
 359
 360         return 0;
 361 }
 362
 363 static int
 364 service_handle_event(struct ubus_context *ctx, struct ubus_object *obj,
 365                         struct ubus_request_data *req, const char *method,
 366                         struct blob_attr *msg)
 367 {
 368         struct blob_attr *tb[__EVENT_MAX];
 369
 370         if (!msg)
 371                 return UBUS_STATUS_INVALID_ARGUMENT;
 372
 373         blobmsg_parse(event_policy, __EVENT_MAX, tb, blob_data(msg), blob_len(msg));
 374         if (!tb[EVENT_TYPE] || !tb[EVENT_DATA])
 375                 return UBUS_STATUS_INVALID_ARGUMENT;
 376
 377         trigger_event(blobmsg_get_string(tb[EVENT_TYPE]), tb[EVENT_DATA]);
 378
 379         return 0;
 380 }
 381
 382 static int
 383 service_handle_validate(struct ubus_context *ctx, struct ubus_object *obj,
 384                         struct ubus_request_data *req, const char *method,
 385                         struct blob_attr *msg)
 386 {
 387         struct blob_attr *tb[__VALIDATE_MAX];
 388         char *p = NULL, *t = NULL;
 389
 390         if (!msg)
 391                 return UBUS_STATUS_INVALID_ARGUMENT;
 392
 393         blobmsg_parse(validate_policy, __VALIDATE_MAX, tb, blob_data(msg), blob_len(msg));
 394         if (tb[VALIDATE_SERVICE]) {
 395                 return 0;
 396         }
 397         if (tb[VALIDATE_PACKAGE])
 398                 p = blobmsg_get_string(tb[VALIDATE_PACKAGE]);
 399
 400         if (tb[VALIDATE_TYPE])
 401                 t = blobmsg_get_string(tb[VALIDATE_TYPE]);
 402
 403         blob_buf_init(&b, 0);
 404         service_validate_dump_all(&b, p, t);
 405         ubus_send_reply(ctx, req, b.head);
 406
 407         return 0;
 408 }
 409
 410 static struct ubus_method main_object_methods[] = {
 411         UBUS_METHOD("set", service_handle_set, service_set_attrs),
 412         UBUS_METHOD("add", service_handle_set, service_set_attrs),
 413         UBUS_METHOD("list", service_handle_list, service_attrs),
 414         UBUS_METHOD("delete", service_handle_delete, service_del_attrs),
 415         UBUS_METHOD("update_start", service_handle_update, service_attrs),
 416         UBUS_METHOD("update_complete", service_handle_update, service_attrs),
 417         UBUS_METHOD("event", service_handle_event, event_policy),
 418         UBUS_METHOD("validate", service_handle_validate, validate_policy),
 419 };
 420
 421 static struct ubus_object_type main_object_type =
 422         UBUS_OBJECT_TYPE("service", main_object_methods);
 423
 424 static struct ubus_object main_object = {
 425         .name = "service",
 426         .type = &main_object_type,
 427         .methods = main_object_methods,
 428         .n_methods = ARRAY_SIZE(main_object_methods),
 429 };
 430
 431 int
 432 service_start_early(char *name, char *cmdline)
 433 {
 434         void *instances, *instance, *command, *respawn;
 435         char *t;
 436
 437         blob_buf_init(&b, 0);
 438         blobmsg_add_string(&b, "name", name);
 439         instances = blobmsg_open_table(&b, "instances");
 440         instance = blobmsg_open_table(&b, "instance1");
 441         command = blobmsg_open_array(&b, "command");
 442         t = strtok(cmdline, " ");
 443         while (t) {
 444                 blobmsg_add_string(&b, NULL, t);
 445                 t = strtok(NULL, " ");
 446         }
 447         blobmsg_close_array(&b, command);
 448         respawn = blobmsg_open_array(&b, "respawn");
 449         blobmsg_add_string(&b, NULL, "3600");
 450         blobmsg_add_string(&b, NULL, "1");
 451         blobmsg_add_string(&b, NULL, "0");
 452         blobmsg_close_array(&b, respawn);
 453         blobmsg_close_table(&b, instance);
 454         blobmsg_close_table(&b, instances);
 455
 456         return service_handle_set(NULL, NULL, NULL, "add", b.head);
 457 }
 458
 459 void ubus_init_service(struct ubus_context *ctx)
 460 {
 461         ubus_add_object(ctx, &main_object);
 462 }
 463
 464 void
 465 service_init(void)
 466 {
 467         avl_init(&services, avl_strcmp, false, NULL);
 468         service_validate_init();
 469 }
 470