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 = blob_memdup(tb[SERVICE_SET_TRIGGER]);
 121                 if (!s->trigger)
 122                         return -1;
 123                 trigger_add(s->trigger, s);
 124         }
 125
 126         if (tb[SERVICE_SET_VALIDATE] && blobmsg_data_len(tb[SERVICE_SET_VALIDATE])) {
 127                 blobmsg_for_each_attr(cur, tb[SERVICE_SET_VALIDATE], rem)
 128                         service_validate_add(s, cur);
 129         }
 130
 131         if (tb[SERVICE_SET_INSTANCES]) {
 132                 if (!add)
 133                         vlist_update(&s->instances);
 134                 blobmsg_for_each_attr(cur, tb[SERVICE_SET_INSTANCES], rem) {
 135                         service_instance_add(s, cur);
 136                 }
 137                 if (!add)
 138                         vlist_flush(&s->instances);
 139         }
 140
 141         rc(s->name, "running");
 142
 143         return 0;
 144 }
 145
 146 static void
 147 service_delete(struct service *s)
 148 {
 149         vlist_flush_all(&s->instances);
 150         avl_delete(&services, &s->avl);
 151         trigger_del(s);
 152         s->trigger = NULL;
 153         free(s->trigger);
 154         free(s);
 155         service_validate_del(s);
 156 }
 157
 158 enum {
 159         SERVICE_ATTR_NAME,
 160         __SERVICE_ATTR_MAX,
 161 };
 162
 163 static const struct blobmsg_policy service_attrs[__SERVICE_ATTR_MAX] = {
 164         [SERVICE_ATTR_NAME] = { "name", BLOBMSG_TYPE_STRING },
 165 };
 166
 167 enum {
 168         SERVICE_DEL_ATTR_NAME,
 169         SERVICE_DEL_ATTR_INSTANCE,
 170         __SERVICE_DEL_ATTR_MAX,
 171 };
 172
 173 static const struct blobmsg_policy service_del_attrs[__SERVICE_DEL_ATTR_MAX] = {
 174         [SERVICE_DEL_ATTR_NAME] = { "name", BLOBMSG_TYPE_STRING },
 175         [SERVICE_DEL_ATTR_INSTANCE] = { "instance", BLOBMSG_TYPE_STRING },
 176 };
 177
 178 enum {
 179         SERVICE_LIST_ATTR_VERBOSE,
 180         __SERVICE_LIST_ATTR_MAX,
 181 };
 182
 183 static const struct blobmsg_policy service_list_attrs[__SERVICE_LIST_ATTR_MAX] = {
 184         [SERVICE_LIST_ATTR_VERBOSE] = { "verbose", BLOBMSG_TYPE_BOOL },
 185 };
 186
 187 enum {
 188         EVENT_TYPE,
 189         EVENT_DATA,
 190         __EVENT_MAX
 191 };
 192
 193 static const struct blobmsg_policy event_policy[__EVENT_MAX] = {
 194         [EVENT_TYPE] = { .name = "type", .type = BLOBMSG_TYPE_STRING },
 195         [EVENT_DATA] = { .name = "data", .type = BLOBMSG_TYPE_TABLE },
 196 };
 197
 198 enum {
 199         VALIDATE_PACKAGE,
 200         VALIDATE_TYPE,
 201         VALIDATE_SERVICE,
 202         __VALIDATE_MAX
 203 };
 204
 205 static const struct blobmsg_policy validate_policy[__VALIDATE_MAX] = {
 206         [VALIDATE_PACKAGE] = { .name = "package", .type = BLOBMSG_TYPE_STRING },
 207         [VALIDATE_TYPE] = { .name = "type", .type = BLOBMSG_TYPE_STRING },
 208         [VALIDATE_SERVICE] = { .name = "service", .type = BLOBMSG_TYPE_STRING },
 209 };
 210
 211 static int
 212 service_handle_set(struct ubus_context *ctx, struct ubus_object *obj,
 213                    struct ubus_request_data *req, const char *method,
 214                    struct blob_attr *msg)
 215 {
 216         struct blob_attr *tb[__SERVICE_SET_MAX], *cur;
 217         struct service *s = NULL;
 218         const char *name;
 219         int ret = UBUS_STATUS_INVALID_ARGUMENT;
 220         bool add = !strcmp(method, "add");
 221
 222         blobmsg_parse(service_set_attrs, __SERVICE_SET_MAX, tb, blob_data(msg), blob_len(msg));
 223         cur = tb[SERVICE_ATTR_NAME];
 224         if (!cur)
 225                 goto free;
 226
 227         name = blobmsg_data(cur);
 228
 229         s = avl_find_element(&services, name, s, avl);
 230         if (s) {
 231                 DEBUG(2, "Update service %s\n", name);
 232                 return service_update(s, msg, tb, add);
 233         }
 234
 235         DEBUG(2, "Create service %s\n", name);
 236         s = service_alloc(name);
 237         if (!s)
 238                 return UBUS_STATUS_UNKNOWN_ERROR;
 239
 240         ret = service_update(s, msg, tb, add);
 241         if (ret)
 242                 goto free;
 243
 244         avl_insert(&services, &s->avl);
 245
 246         return 0;
 247
 248 free:
 249         free(msg);
 250         return ret;
 251 }
 252
 253 static void
 254 service_dump(struct service *s, int verbose)
 255 {
 256         struct service_instance *in;
 257         void *c, *i;
 258
 259         c = blobmsg_open_table(&b, s->name);
 260
 261         if (!avl_is_empty(&s->instances.avl)) {
 262                 i = blobmsg_open_table(&b, "instances");
 263                 vlist_for_each_element(&s->instances, in, node)
 264                         instance_dump(&b, in, verbose);
 265                 blobmsg_close_table(&b, i);
 266         }
 267         if (verbose && s->trigger)
 268                 blobmsg_add_blob(&b, s->trigger);
 269         if (verbose && !list_empty(&s->validators))
 270                 service_validate_dump(&b, s);
 271         blobmsg_close_table(&b, c);
 272 }
 273
 274 static int
 275 service_handle_list(struct ubus_context *ctx, struct ubus_object *obj,
 276                     struct ubus_request_data *req, const char *method,
 277                     struct blob_attr *msg)
 278 {
 279         struct blob_attr *tb[__SERVICE_LIST_ATTR_MAX];
 280         struct service *s;
 281         int verbose = 0;
 282
 283         blobmsg_parse(service_list_attrs, __SERVICE_LIST_ATTR_MAX, tb, blob_data(msg), blob_len(msg));
 284
 285         if (tb[SERVICE_LIST_ATTR_VERBOSE] && blobmsg_get_bool(tb[SERVICE_LIST_ATTR_VERBOSE]))
 286                 verbose = 1;
 287
 288         blob_buf_init(&b, 0);
 289         avl_for_each_element(&services, s, avl)
 290                 service_dump(s, verbose);
 291
 292         ubus_send_reply(ctx, req, b.head);
 293
 294         return 0;
 295 }
 296
 297 static int
 298 service_handle_delete(struct ubus_context *ctx, struct ubus_object *obj,
 299                     struct ubus_request_data *req, const char *method,
 300                     struct blob_attr *msg)
 301 {
 302         struct blob_attr *tb[__SERVICE_DEL_ATTR_MAX], *cur;
 303         struct service *s;
 304         struct service_instance *in;
 305
 306         blobmsg_parse(service_del_attrs, __SERVICE_DEL_ATTR_MAX, tb, blob_data(msg), blob_len(msg));
 307
 308         cur = tb[SERVICE_DEL_ATTR_NAME];
 309         if (!cur)
 310                 return UBUS_STATUS_NOT_FOUND;
 311
 312         s = avl_find_element(&services, blobmsg_data(cur), s, avl);
 313         if (!s)
 314                 return UBUS_STATUS_NOT_FOUND;
 315
 316         cur = tb[SERVICE_DEL_ATTR_INSTANCE];
 317         if (!cur) {
 318                 service_delete(s);
 319                 return 0;
 320         }
 321
 322         in = vlist_find(&s->instances, blobmsg_data(cur), in, node);
 323         if (!in) {
 324                 ERROR("instance %s not found\n", (char *) blobmsg_data(cur));
 325                 return UBUS_STATUS_NOT_FOUND;
 326         }
 327
 328         vlist_delete(&s->instances, &in->node);
 329
 330         return 0;
 331 }
 332
 333 static int
 334 service_handle_update(struct ubus_context *ctx, struct ubus_object *obj,
 335                       struct ubus_request_data *req, const char *method,
 336                       struct blob_attr *msg)
 337 {
 338         struct blob_attr *tb[__SERVICE_ATTR_MAX], *cur;
 339         struct service *s;
 340
 341         blobmsg_parse(service_attrs, __SERVICE_ATTR_MAX, tb, blob_data(msg), blob_len(msg));
 342
 343         cur = tb[SERVICE_ATTR_NAME];
 344         if (!cur)
 345                 return UBUS_STATUS_INVALID_ARGUMENT;
 346
 347         s = avl_find_element(&services, blobmsg_data(cur), s, avl);
 348         if (!s)
 349                 return UBUS_STATUS_NOT_FOUND;
 350
 351         if (!strcmp(method, "update_start"))
 352                 vlist_update(&s->instances);
 353         else
 354                 vlist_flush(&s->instances);
 355
 356         return 0;
 357 }
 358
 359 static int
 360 service_handle_event(struct ubus_context *ctx, struct ubus_object *obj,
 361                         struct ubus_request_data *req, const char *method,
 362                         struct blob_attr *msg)
 363 {
 364         struct blob_attr *tb[__EVENT_MAX];
 365
 366         if (!msg)
 367                 return UBUS_STATUS_INVALID_ARGUMENT;
 368
 369         blobmsg_parse(event_policy, __EVENT_MAX, tb, blob_data(msg), blob_len(msg));
 370         if (!tb[EVENT_TYPE] || !tb[EVENT_DATA])
 371                 return UBUS_STATUS_INVALID_ARGUMENT;
 372
 373         trigger_event(blobmsg_get_string(tb[EVENT_TYPE]), tb[EVENT_DATA]);
 374
 375         return 0;
 376 }
 377
 378 static int
 379 service_handle_validate(struct ubus_context *ctx, struct ubus_object *obj,
 380                         struct ubus_request_data *req, const char *method,
 381                         struct blob_attr *msg)
 382 {
 383         struct blob_attr *tb[__VALIDATE_MAX];
 384         char *p = NULL, *t = NULL;
 385
 386         if (!msg)
 387                 return UBUS_STATUS_INVALID_ARGUMENT;
 388
 389         blobmsg_parse(validate_policy, __VALIDATE_MAX, tb, blob_data(msg), blob_len(msg));
 390         if (tb[VALIDATE_SERVICE]) {
 391                 return 0;
 392         }
 393         if (tb[VALIDATE_PACKAGE])
 394                 p = blobmsg_get_string(tb[VALIDATE_PACKAGE]);
 395
 396         if (tb[VALIDATE_TYPE])
 397                 t = blobmsg_get_string(tb[VALIDATE_TYPE]);
 398
 399         blob_buf_init(&b, 0);
 400         service_validate_dump_all(&b, p, t);
 401         ubus_send_reply(ctx, req, b.head);
 402
 403         return 0;
 404 }
 405
 406 static struct ubus_method main_object_methods[] = {
 407         UBUS_METHOD("set", service_handle_set, service_set_attrs),
 408         UBUS_METHOD("add", service_handle_set, service_set_attrs),
 409         UBUS_METHOD("list", service_handle_list, service_attrs),
 410         UBUS_METHOD("delete", service_handle_delete, service_del_attrs),
 411         UBUS_METHOD("update_start", service_handle_update, service_attrs),
 412         UBUS_METHOD("update_complete", service_handle_update, service_attrs),
 413         UBUS_METHOD("event", service_handle_event, event_policy),
 414         UBUS_METHOD("validate", service_handle_validate, validate_policy),
 415 };
 416
 417 static struct ubus_object_type main_object_type =
 418         UBUS_OBJECT_TYPE("service", main_object_methods);
 419
 420 static struct ubus_object main_object = {
 421         .name = "service",
 422         .type = &main_object_type,
 423         .methods = main_object_methods,
 424         .n_methods = ARRAY_SIZE(main_object_methods),
 425 };
 426
 427 int
 428 service_start_early(char *name, char *cmdline)
 429 {
 430         void *instances, *instance, *command, *respawn;
 431         char *t;
 432
 433         blob_buf_init(&b, 0);
 434         blobmsg_add_string(&b, "name", name);
 435         instances = blobmsg_open_table(&b, "instances");
 436         instance = blobmsg_open_table(&b, "instance1");
 437         command = blobmsg_open_array(&b, "command");
 438         t = strtok(cmdline, " ");
 439         while (t) {
 440                 blobmsg_add_string(&b, NULL, t);
 441                 t = strtok(NULL, " ");
 442         }
 443         blobmsg_close_array(&b, command);
 444         respawn = blobmsg_open_array(&b, "respawn");
 445         blobmsg_add_string(&b, NULL, "3600");
 446         blobmsg_add_string(&b, NULL, "1");
 447         blobmsg_add_string(&b, NULL, "0");
 448         blobmsg_close_array(&b, respawn);
 449         blobmsg_close_table(&b, instance);
 450         blobmsg_close_table(&b, instances);
 451
 452         return service_handle_set(NULL, NULL, NULL, "add", b.head);
 453 }
 454
 455 void ubus_init_service(struct ubus_context *ctx)
 456 {
 457         ubus_add_object(ctx, &main_object);
 458 }
 459
 460 void
 461 service_init(void)
 462 {
 463         avl_init(&services, avl_strcmp, false, NULL);
 464         service_validate_init();
 465 }
 466