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 static struct ubus_context *ctx;
  28
  29 static void
  30 service_instance_add(struct service *s, struct blob_attr *attr)
  31 {
  32         struct service_instance *in;
  33
  34         if (blobmsg_type(attr) != BLOBMSG_TYPE_TABLE)
  35                 return;
  36
  37         in = calloc(1, sizeof(*in));
  38         if (!in)
  39                 return;
  40
  41         instance_init(in, s, attr);
  42         vlist_add(&s->instances, &in->node, (void *) in->name);
  43 }
  44
  45 static void
  46 service_instance_update(struct vlist_tree *tree, struct vlist_node *node_new,
  47                         struct vlist_node *node_old)
  48 {
  49         struct service_instance *in_o = NULL, *in_n = NULL;
  50
  51         if (node_old)
  52                 in_o = container_of(node_old, struct service_instance, node);
  53
  54         if (node_new)
  55                 in_n = container_of(node_new, struct service_instance, node);
  56
  57         if (in_o && in_n) {
  58                 DEBUG(2, "Update instance %s::%s\n", in_o->srv->name, in_o->name);
  59                 instance_update(in_o, in_n);
  60                 instance_free(in_n);
  61         } else if (in_o) {
  62                 DEBUG(2, "Free instance %s::%s\n", in_o->srv->name, in_o->name);
  63                 instance_stop(in_o);
  64                 instance_free(in_o);
  65         } else if (in_n) {
  66                 DEBUG(2, "Create instance %s::%s\n", in_n->srv->name, in_n->name);
  67                 instance_start(in_n);
  68         }
  69         blob_buf_init(&b, 0);
  70         trigger_event("instance.update", b.head);
  71 }
  72
  73 static struct service *
  74 service_alloc(const char *name)
  75 {
  76         struct service *s;
  77         char *new_name;
  78
  79         s = calloc_a(sizeof(*s), &new_name, strlen(name) + 1);
  80         strcpy(new_name, name);
  81
  82         vlist_init(&s->instances, avl_strcmp, service_instance_update);
  83         s->instances.keep_old = true;
  84         s->name = new_name;
  85         s->avl.key = s->name;
  86         INIT_LIST_HEAD(&s->validators);
  87
  88         return s;
  89 }
  90
  91 enum {
  92         SERVICE_SET_NAME,
  93         SERVICE_SET_SCRIPT,
  94         SERVICE_SET_INSTANCES,
  95         SERVICE_SET_TRIGGER,
  96         SERVICE_SET_VALIDATE,
  97         __SERVICE_SET_MAX
  98 };
  99
 100 static const struct blobmsg_policy service_set_attrs[__SERVICE_SET_MAX] = {
 101         [SERVICE_SET_NAME] = { "name", BLOBMSG_TYPE_STRING },
 102         [SERVICE_SET_SCRIPT] = { "script", BLOBMSG_TYPE_STRING },
 103         [SERVICE_SET_INSTANCES] = { "instances", BLOBMSG_TYPE_TABLE },
 104         [SERVICE_SET_TRIGGER] = { "triggers", BLOBMSG_TYPE_ARRAY },
 105         [SERVICE_SET_VALIDATE] = { "validate", BLOBMSG_TYPE_ARRAY },
 106 };
 107
 108 static int
 109 service_update(struct service *s, struct blob_attr **tb, bool add)
 110 {
 111         struct blob_attr *cur;
 112         int rem;
 113
 114         if (s->trigger) {
 115                 trigger_del(s);
 116                 free(s->trigger);
 117                 s->trigger = NULL;
 118         }
 119
 120         service_validate_del(s);
 121
 122         if (tb[SERVICE_SET_TRIGGER] && blobmsg_data_len(tb[SERVICE_SET_TRIGGER])) {
 123                 s->trigger = blob_memdup(tb[SERVICE_SET_TRIGGER]);
 124                 if (!s->trigger)
 125                         return -1;
 126                 trigger_add(s->trigger, s);
 127         }
 128
 129         if (tb[SERVICE_SET_VALIDATE] && blobmsg_data_len(tb[SERVICE_SET_VALIDATE])) {
 130                 blobmsg_for_each_attr(cur, tb[SERVICE_SET_VALIDATE], rem)
 131                         service_validate_add(s, cur);
 132         }
 133
 134         if (tb[SERVICE_SET_INSTANCES]) {
 135                 if (!add)
 136                         vlist_update(&s->instances);
 137                 blobmsg_for_each_attr(cur, tb[SERVICE_SET_INSTANCES], rem) {
 138                         service_instance_add(s, cur);
 139                 }
 140                 if (!add)
 141                         vlist_flush(&s->instances);
 142         }
 143
 144         rc(s->name, "running");
 145
 146         return 0;
 147 }
 148
 149 static void
 150 service_delete(struct service *s)
 151 {
 152         service_event("service.stop", s->name, NULL);
 153         vlist_flush_all(&s->instances);
 154         avl_delete(&services, &s->avl);
 155         trigger_del(s);
 156         free(s->trigger);
 157         free(s);
 158         service_validate_del(s);
 159 }
 160
 161 enum {
 162         SERVICE_ATTR_NAME,
 163         __SERVICE_ATTR_MAX,
 164 };
 165
 166 static const struct blobmsg_policy service_attrs[__SERVICE_ATTR_MAX] = {
 167         [SERVICE_ATTR_NAME] = { "name", BLOBMSG_TYPE_STRING },
 168 };
 169
 170 enum {
 171         SERVICE_DEL_ATTR_NAME,
 172         SERVICE_DEL_ATTR_INSTANCE,
 173         __SERVICE_DEL_ATTR_MAX,
 174 };
 175
 176 static const struct blobmsg_policy service_del_attrs[__SERVICE_DEL_ATTR_MAX] = {
 177         [SERVICE_DEL_ATTR_NAME] = { "name", BLOBMSG_TYPE_STRING },
 178         [SERVICE_DEL_ATTR_INSTANCE] = { "instance", BLOBMSG_TYPE_STRING },
 179 };
 180
 181 enum {
 182         SERVICE_LIST_ATTR_NAME,
 183         SERVICE_LIST_ATTR_VERBOSE,
 184         __SERVICE_LIST_ATTR_MAX,
 185 };
 186
 187 static const struct blobmsg_policy service_list_attrs[__SERVICE_LIST_ATTR_MAX] = {
 188         [SERVICE_LIST_ATTR_NAME] = { "name", BLOBMSG_TYPE_STRING },
 189         [SERVICE_LIST_ATTR_VERBOSE] = { "verbose", BLOBMSG_TYPE_BOOL },
 190 };
 191
 192 enum {
 193         EVENT_TYPE,
 194         EVENT_DATA,
 195         __EVENT_MAX
 196 };
 197
 198 static const struct blobmsg_policy event_policy[__EVENT_MAX] = {
 199         [EVENT_TYPE] = { .name = "type", .type = BLOBMSG_TYPE_STRING },
 200         [EVENT_DATA] = { .name = "data", .type = BLOBMSG_TYPE_TABLE },
 201 };
 202
 203 enum {
 204         VALIDATE_PACKAGE,
 205         VALIDATE_TYPE,
 206         VALIDATE_SERVICE,
 207         __VALIDATE_MAX
 208 };
 209
 210 static const struct blobmsg_policy validate_policy[__VALIDATE_MAX] = {
 211         [VALIDATE_PACKAGE] = { .name = "package", .type = BLOBMSG_TYPE_STRING },
 212         [VALIDATE_TYPE] = { .name = "type", .type = BLOBMSG_TYPE_STRING },
 213         [VALIDATE_SERVICE] = { .name = "service", .type = BLOBMSG_TYPE_STRING },
 214 };
 215
 216 static const struct blobmsg_policy get_data_policy[] = {
 217         { "type", BLOBMSG_TYPE_STRING }
 218 };
 219
 220 static int
 221 service_handle_set(struct ubus_context *ctx, struct ubus_object *obj,
 222                    struct ubus_request_data *req, const char *method,
 223                    struct blob_attr *msg)
 224 {
 225         struct blob_attr *tb[__SERVICE_SET_MAX], *cur;
 226         struct service *s = NULL;
 227         const char *name;
 228         bool add = !strcmp(method, "add");
 229         int ret;
 230
 231         blobmsg_parse(service_set_attrs, __SERVICE_SET_MAX, tb, blob_data(msg), blob_len(msg));
 232         cur = tb[SERVICE_ATTR_NAME];
 233         if (!cur)
 234                 return UBUS_STATUS_INVALID_ARGUMENT;
 235
 236         name = blobmsg_data(cur);
 237
 238         s = avl_find_element(&services, name, s, avl);
 239         if (s) {
 240                 DEBUG(2, "Update service %s\n", name);
 241                 return service_update(s, tb, add);
 242         }
 243
 244         DEBUG(2, "Create service %s\n", name);
 245         s = service_alloc(name);
 246         if (!s)
 247                 return UBUS_STATUS_UNKNOWN_ERROR;
 248
 249         ret = service_update(s, tb, add);
 250         if (ret)
 251                 return ret;
 252
 253         avl_insert(&services, &s->avl);
 254
 255         service_event("service.start", s->name, NULL);
 256
 257         return 0;
 258 }
 259
 260 static void
 261 service_dump(struct service *s, bool verbose)
 262 {
 263         struct service_instance *in;
 264         void *c, *i;
 265
 266         c = blobmsg_open_table(&b, s->name);
 267
 268         if (!avl_is_empty(&s->instances.avl)) {
 269                 i = blobmsg_open_table(&b, "instances");
 270                 vlist_for_each_element(&s->instances, in, node)
 271                         instance_dump(&b, in, verbose);
 272                 blobmsg_close_table(&b, i);
 273         }
 274         if (verbose && s->trigger)
 275                 blobmsg_add_blob(&b, s->trigger);
 276         if (verbose && !list_empty(&s->validators))
 277                 service_validate_dump(&b, s);
 278         blobmsg_close_table(&b, c);
 279 }
 280
 281 static int
 282 service_handle_list(struct ubus_context *ctx, struct ubus_object *obj,
 283                     struct ubus_request_data *req, const char *method,
 284                     struct blob_attr *msg)
 285 {
 286         struct blob_attr *tb[__SERVICE_LIST_ATTR_MAX];
 287         struct service *s;
 288         const char *name = NULL;
 289         bool verbose = false;
 290
 291         blobmsg_parse(service_list_attrs, __SERVICE_LIST_ATTR_MAX, tb, blob_data(msg), blob_len(msg));
 292
 293         if (tb[SERVICE_LIST_ATTR_VERBOSE])
 294                 verbose = blobmsg_get_bool(tb[SERVICE_LIST_ATTR_VERBOSE]);
 295         if (tb[SERVICE_LIST_ATTR_NAME])
 296                 name = blobmsg_get_string(tb[SERVICE_LIST_ATTR_NAME]);
 297
 298         blob_buf_init(&b, 0);
 299         avl_for_each_element(&services, s, avl) {
 300                 if (name && strcmp(s->name, name) != 0)
 301                         continue;
 302
 303                 service_dump(s, verbose);
 304         }
 305
 306         ubus_send_reply(ctx, req, b.head);
 307
 308         return 0;
 309 }
 310
 311 static int
 312 service_handle_delete(struct ubus_context *ctx, struct ubus_object *obj,
 313                     struct ubus_request_data *req, const char *method,
 314                     struct blob_attr *msg)
 315 {
 316         struct blob_attr *tb[__SERVICE_DEL_ATTR_MAX], *cur;
 317         struct service *s;
 318         struct service_instance *in;
 319
 320         blobmsg_parse(service_del_attrs, __SERVICE_DEL_ATTR_MAX, tb, blob_data(msg), blob_len(msg));
 321
 322         cur = tb[SERVICE_DEL_ATTR_NAME];
 323         if (!cur)
 324                 return UBUS_STATUS_NOT_FOUND;
 325
 326         s = avl_find_element(&services, blobmsg_data(cur), s, avl);
 327         if (!s)
 328                 return UBUS_STATUS_NOT_FOUND;
 329
 330         cur = tb[SERVICE_DEL_ATTR_INSTANCE];
 331         if (!cur) {
 332                 service_delete(s);
 333                 return 0;
 334         }
 335
 336         in = vlist_find(&s->instances, blobmsg_data(cur), in, node);
 337         if (!in) {
 338                 ERROR("instance %s not found\n", (char *) blobmsg_data(cur));
 339                 return UBUS_STATUS_NOT_FOUND;
 340         }
 341
 342         vlist_delete(&s->instances, &in->node);
 343
 344         return 0;
 345 }
 346
 347 static int
 348 service_handle_update(struct ubus_context *ctx, struct ubus_object *obj,
 349                       struct ubus_request_data *req, const char *method,
 350                       struct blob_attr *msg)
 351 {
 352         struct blob_attr *tb[__SERVICE_ATTR_MAX], *cur;
 353         struct service *s;
 354
 355         blobmsg_parse(service_attrs, __SERVICE_ATTR_MAX, tb, blob_data(msg), blob_len(msg));
 356
 357         cur = tb[SERVICE_ATTR_NAME];
 358         if (!cur)
 359                 return UBUS_STATUS_INVALID_ARGUMENT;
 360
 361         s = avl_find_element(&services, blobmsg_data(cur), s, avl);
 362         if (!s)
 363                 return UBUS_STATUS_NOT_FOUND;
 364
 365         if (!strcmp(method, "update_start"))
 366                 vlist_update(&s->instances);
 367         else
 368                 vlist_flush(&s->instances);
 369
 370         return 0;
 371 }
 372
 373 static int
 374 service_handle_event(struct ubus_context *ctx, struct ubus_object *obj,
 375                         struct ubus_request_data *req, const char *method,
 376                         struct blob_attr *msg)
 377 {
 378         struct blob_attr *tb[__EVENT_MAX];
 379
 380         if (!msg)
 381                 return UBUS_STATUS_INVALID_ARGUMENT;
 382
 383         blobmsg_parse(event_policy, __EVENT_MAX, tb, blob_data(msg), blob_len(msg));
 384         if (!tb[EVENT_TYPE] || !tb[EVENT_DATA])
 385                 return UBUS_STATUS_INVALID_ARGUMENT;
 386
 387         trigger_event(blobmsg_get_string(tb[EVENT_TYPE]), tb[EVENT_DATA]);
 388
 389         return 0;
 390 }
 391
 392 static int
 393 service_handle_validate(struct ubus_context *ctx, struct ubus_object *obj,
 394                         struct ubus_request_data *req, const char *method,
 395                         struct blob_attr *msg)
 396 {
 397         struct blob_attr *tb[__VALIDATE_MAX];
 398         char *p = NULL, *t = NULL;
 399
 400         if (!msg)
 401                 return UBUS_STATUS_INVALID_ARGUMENT;
 402
 403         blobmsg_parse(validate_policy, __VALIDATE_MAX, tb, blob_data(msg), blob_len(msg));
 404         if (tb[VALIDATE_SERVICE]) {
 405                 return 0;
 406         }
 407         if (tb[VALIDATE_PACKAGE])
 408                 p = blobmsg_get_string(tb[VALIDATE_PACKAGE]);
 409
 410         if (tb[VALIDATE_TYPE])
 411                 t = blobmsg_get_string(tb[VALIDATE_TYPE]);
 412
 413         blob_buf_init(&b, 0);
 414         service_validate_dump_all(&b, p, t);
 415         ubus_send_reply(ctx, req, b.head);
 416
 417         return 0;
 418 }
 419
 420 static int
 421 service_get_data(struct ubus_context *ctx, struct ubus_object *obj,
 422                  struct ubus_request_data *req, const char *method,
 423                  struct blob_attr *msg)
 424 {
 425         struct service_instance *in;
 426         struct service *s;
 427         struct blob_attr *tb;
 428         const char *type = NULL;
 429
 430         blobmsg_parse(get_data_policy, 1, &tb, blob_data(msg), blob_len(msg));
 431         if (tb)
 432                 type = blobmsg_data(tb);
 433
 434         blob_buf_init(&b, 0);
 435         avl_for_each_element(&services, s, avl) {
 436                 void *cs = NULL;
 437
 438                 vlist_for_each_element(&s->instances, in, node) {
 439                         struct blobmsg_list_node *var;
 440                         void *ci = NULL;
 441
 442                         blobmsg_list_for_each(&in->data, var) {
 443                                 if (type &&
 444                                     strcmp(blobmsg_name(var->data), type) != 0)
 445                                         continue;
 446
 447                                 if (!cs)
 448                                         cs = blobmsg_open_table(&b, s->name);
 449                                 if (!ci)
 450                                         ci = blobmsg_open_table(&b, in->name);
 451
 452                                 blobmsg_add_blob(&b, var->data);
 453                         }
 454
 455                         if (ci)
 456                                 blobmsg_close_table(&b, ci);
 457                 }
 458
 459                 if (cs)
 460                         blobmsg_close_table(&b, cs);
 461         }
 462
 463         ubus_send_reply(ctx, req, b.head);
 464         return 0;
 465 }
 466
 467 static struct ubus_method main_object_methods[] = {
 468         UBUS_METHOD("set", service_handle_set, service_set_attrs),
 469         UBUS_METHOD("add", service_handle_set, service_set_attrs),
 470         UBUS_METHOD("list", service_handle_list, service_list_attrs),
 471         UBUS_METHOD("delete", service_handle_delete, service_del_attrs),
 472         UBUS_METHOD("update_start", service_handle_update, service_attrs),
 473         UBUS_METHOD("update_complete", service_handle_update, service_attrs),
 474         UBUS_METHOD("event", service_handle_event, event_policy),
 475         UBUS_METHOD("validate", service_handle_validate, validate_policy),
 476         UBUS_METHOD("get_data", service_get_data, get_data_policy),
 477 };
 478
 479 static struct ubus_object_type main_object_type =
 480         UBUS_OBJECT_TYPE("service", main_object_methods);
 481
 482 static struct ubus_object main_object = {
 483         .name = "service",
 484         .type = &main_object_type,
 485         .methods = main_object_methods,
 486         .n_methods = ARRAY_SIZE(main_object_methods),
 487 };
 488
 489 int
 490 service_start_early(char *name, char *cmdline)
 491 {
 492         void *instances, *instance, *command, *respawn;
 493         char *t;
 494
 495         blob_buf_init(&b, 0);
 496         blobmsg_add_string(&b, "name", name);
 497         instances = blobmsg_open_table(&b, "instances");
 498         instance = blobmsg_open_table(&b, "instance1");
 499         command = blobmsg_open_array(&b, "command");
 500         t = strtok(cmdline, " ");
 501         while (t) {
 502                 blobmsg_add_string(&b, NULL, t);
 503                 t = strtok(NULL, " ");
 504         }
 505         blobmsg_close_array(&b, command);
 506         respawn = blobmsg_open_array(&b, "respawn");
 507         blobmsg_add_string(&b, NULL, "3600");
 508         blobmsg_add_string(&b, NULL, "1");
 509         blobmsg_add_string(&b, NULL, "0");
 510         blobmsg_close_array(&b, respawn);
 511         blobmsg_close_table(&b, instance);
 512         blobmsg_close_table(&b, instances);
 513
 514         return service_handle_set(NULL, NULL, NULL, "add", b.head);
 515 }
 516
 517 void service_event(const char *type, const char *service, const char *instance)
 518 {
 519         if (!ctx)
 520                 return;
 521
 522         blob_buf_init(&b, 0);
 523         blobmsg_add_string(&b, "service", service);
 524         if (instance)
 525                 blobmsg_add_string(&b, "instance", instance);
 526         ubus_notify(ctx, &main_object, type, b.head, -1);
 527 }
 528
 529 void ubus_init_service(struct ubus_context *_ctx)
 530 {
 531         ctx = _ctx;
 532         ubus_add_object(ctx, &main_object);
 533 }
 534
 535 void
 536 service_init(void)
 537 {
 538         avl_init(&services, avl_strcmp, false, NULL);
 539         service_validate_init();
 540 }
 541