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         rc(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                 i = blobmsg_open_table(&b, "instances");
 264                 vlist_for_each_element(&s->instances, in, node)
 265                         instance_dump(&b, in, verbose);
 266                 blobmsg_close_table(&b, i);
 267         }
 268         if (verbose && s->trigger)
 269                 blobmsg_add_blob(&b, s->trigger);
 270         if (verbose && !list_empty(&s->validators))
 271                 service_validate_dump(&b, s);
 272         blobmsg_close_table(&b, c);
 273 }
 274
 275 static int
 276 service_handle_list(struct ubus_context *ctx, struct ubus_object *obj,
 277                     struct ubus_request_data *req, const char *method,
 278                     struct blob_attr *msg)
 279 {
 280         struct blob_attr *tb[__SERVICE_LIST_ATTR_MAX];
 281         struct service *s;
 282         int verbose = 0;
 283
 284         blobmsg_parse(service_list_attrs, __SERVICE_LIST_ATTR_MAX, tb, blob_data(msg), blob_len(msg));
 285
 286         if (tb[SERVICE_LIST_ATTR_VERBOSE] && blobmsg_get_bool(tb[SERVICE_LIST_ATTR_VERBOSE]))
 287                 verbose = 1;
 288
 289         blob_buf_init(&b, 0);
 290         avl_for_each_element(&services, s, avl)
 291                 service_dump(s, verbose);
 292
 293         ubus_send_reply(ctx, req, b.head);
 294
 295         return 0;
 296 }
 297
 298 static int
 299 service_handle_delete(struct ubus_context *ctx, struct ubus_object *obj,
 300                     struct ubus_request_data *req, const char *method,
 301                     struct blob_attr *msg)
 302 {
 303         struct blob_attr *tb[__SERVICE_DEL_ATTR_MAX], *cur;
 304         struct service *s;
 305         struct service_instance *in;
 306
 307         blobmsg_parse(service_del_attrs, __SERVICE_DEL_ATTR_MAX, tb, blob_data(msg), blob_len(msg));
 308
 309         cur = tb[SERVICE_DEL_ATTR_NAME];
 310         if (!cur)
 311                 return UBUS_STATUS_NOT_FOUND;
 312
 313         s = avl_find_element(&services, blobmsg_data(cur), s, avl);
 314         if (!s)
 315                 return UBUS_STATUS_NOT_FOUND;
 316
 317         cur = tb[SERVICE_DEL_ATTR_INSTANCE];
 318         if (!cur) {
 319                 service_delete(s);
 320                 return 0;
 321         }
 322
 323         in = vlist_find(&s->instances, blobmsg_data(cur), in, node);
 324         if (!in) {
 325                 ERROR("instance %s not found\n", (char *) blobmsg_data(cur));
 326                 return UBUS_STATUS_NOT_FOUND;
 327         }
 328
 329         vlist_delete(&s->instances, &in->node);
 330
 331         return 0;
 332 }
 333
 334 static int
 335 service_handle_update(struct ubus_context *ctx, struct ubus_object *obj,
 336                       struct ubus_request_data *req, const char *method,
 337                       struct blob_attr *msg)
 338 {
 339         struct blob_attr *tb[__SERVICE_ATTR_MAX], *cur;
 340         struct service *s;
 341
 342         blobmsg_parse(service_attrs, __SERVICE_ATTR_MAX, tb, blob_data(msg), blob_len(msg));
 343
 344         cur = tb[SERVICE_ATTR_NAME];
 345         if (!cur)
 346                 return UBUS_STATUS_INVALID_ARGUMENT;
 347
 348         s = avl_find_element(&services, blobmsg_data(cur), s, avl);
 349         if (!s)
 350                 return UBUS_STATUS_NOT_FOUND;
 351
 352         if (!strcmp(method, "update_start"))
 353                 vlist_update(&s->instances);
 354         else
 355                 vlist_flush(&s->instances);
 356
 357         return 0;
 358 }
 359
 360 static int
 361 service_handle_event(struct ubus_context *ctx, struct ubus_object *obj,
 362                         struct ubus_request_data *req, const char *method,
 363                         struct blob_attr *msg)
 364 {
 365         struct blob_attr *tb[__EVENT_MAX];
 366
 367         if (!msg)
 368                 return UBUS_STATUS_INVALID_ARGUMENT;
 369
 370         blobmsg_parse(event_policy, __EVENT_MAX, tb, blob_data(msg), blob_len(msg));
 371         if (!tb[EVENT_TYPE] || !tb[EVENT_DATA])
 372                 return UBUS_STATUS_INVALID_ARGUMENT;
 373
 374         trigger_event(blobmsg_get_string(tb[EVENT_TYPE]), tb[EVENT_DATA]);
 375
 376         return 0;
 377 }
 378
 379 static int
 380 service_handle_validate(struct ubus_context *ctx, struct ubus_object *obj,
 381                         struct ubus_request_data *req, const char *method,
 382                         struct blob_attr *msg)
 383 {
 384         struct blob_attr *tb[__VALIDATE_MAX];
 385         char *p = NULL, *t = NULL;
 386
 387         if (!msg)
 388                 return UBUS_STATUS_INVALID_ARGUMENT;
 389
 390         blobmsg_parse(validate_policy, __VALIDATE_MAX, tb, blob_data(msg), blob_len(msg));
 391         if (tb[VALIDATE_SERVICE]) {
 392                 return 0;
 393         }
 394         if (tb[VALIDATE_PACKAGE])
 395                 p = blobmsg_get_string(tb[VALIDATE_PACKAGE]);
 396
 397         if (tb[VALIDATE_TYPE])
 398                 t = blobmsg_get_string(tb[VALIDATE_TYPE]);
 399
 400         blob_buf_init(&b, 0);
 401         service_validate_dump_all(&b, p, t);
 402         ubus_send_reply(ctx, req, b.head);
 403
 404         return 0;
 405 }
 406
 407 static struct ubus_method main_object_methods[] = {
 408         UBUS_METHOD("set", service_handle_set, service_set_attrs),
 409         UBUS_METHOD("add", service_handle_set, service_set_attrs),
 410         UBUS_METHOD("list", service_handle_list, service_attrs),
 411         UBUS_METHOD("delete", service_handle_delete, service_del_attrs),
 412         UBUS_METHOD("update_start", service_handle_update, service_attrs),
 413         UBUS_METHOD("update_complete", service_handle_update, service_attrs),
 414         UBUS_METHOD("event", service_handle_event, event_policy),
 415         UBUS_METHOD("validate", service_handle_validate, validate_policy),
 416 };
 417
 418 static struct ubus_object_type main_object_type =
 419         UBUS_OBJECT_TYPE("service", main_object_methods);
 420
 421 static struct ubus_object main_object = {
 422         .name = "service",
 423         .type = &main_object_type,
 424         .methods = main_object_methods,
 425         .n_methods = ARRAY_SIZE(main_object_methods),
 426 };
 427
 428 int
 429 service_start_early(char *name, char *cmdline)
 430 {
 431         void *instances, *instance, *command, *respawn;
 432         char *t;
 433
 434         blob_buf_init(&b, 0);
 435         blobmsg_add_string(&b, "name", name);
 436         instances = blobmsg_open_table(&b, "instances");
 437         instance = blobmsg_open_table(&b, "instance1");
 438         command = blobmsg_open_array(&b, "command");
 439         t = strtok(cmdline, " ");
 440         while (t) {
 441                 blobmsg_add_string(&b, NULL, t);
 442                 t = strtok(NULL, " ");
 443         }
 444         blobmsg_close_array(&b, command);
 445         respawn = blobmsg_open_array(&b, "respawn");
 446         blobmsg_add_string(&b, NULL, "3600");
 447         blobmsg_add_string(&b, NULL, "1");
 448         blobmsg_add_string(&b, NULL, "0");
 449         blobmsg_close_array(&b, respawn);
 450         blobmsg_close_table(&b, instance);
 451         blobmsg_close_table(&b, instances);
 452
 453         return service_handle_set(NULL, NULL, NULL, "add", b.head);
 454 }
 455
 456 void ubus_init_service(struct ubus_context *ctx)
 457 {
 458         ubus_add_object(ctx, &main_object);
 459 }
 460
 461 void
 462 service_init(void)
 463 {
 464         avl_init(&services, avl_strcmp, false, NULL);
 465         service_validate_init();
 466 }
 467