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 AVL_TREE(services, avl_strcmp, false, NULL);
  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 enum {
 217         DATA_NAME,
 218         DATA_INSTANCE,
 219         DATA_TYPE,
 220         __DATA_MAX
 221 };
 222
 223 static const struct blobmsg_policy get_data_policy[] = {
 224         [DATA_NAME] = { "name", BLOBMSG_TYPE_STRING },
 225         [DATA_INSTANCE] = { "instance", BLOBMSG_TYPE_STRING },
 226         [DATA_TYPE] = { "type", BLOBMSG_TYPE_STRING },
 227 };
 228
 229 static int
 230 service_handle_set(struct ubus_context *ctx, struct ubus_object *obj,
 231                    struct ubus_request_data *req, const char *method,
 232                    struct blob_attr *msg)
 233 {
 234         struct blob_attr *tb[__SERVICE_SET_MAX], *cur;
 235         struct service *s = NULL;
 236         const char *name;
 237         bool add = !strcmp(method, "add");
 238         int ret;
 239
 240         blobmsg_parse(service_set_attrs, __SERVICE_SET_MAX, tb, blob_data(msg), blob_len(msg));
 241         cur = tb[SERVICE_ATTR_NAME];
 242         if (!cur)
 243                 return UBUS_STATUS_INVALID_ARGUMENT;
 244
 245         name = blobmsg_data(cur);
 246
 247         s = avl_find_element(&services, name, s, avl);
 248         if (s) {
 249                 DEBUG(2, "Update service %s\n", name);
 250                 return service_update(s, tb, add);
 251         }
 252
 253         DEBUG(2, "Create service %s\n", name);
 254         s = service_alloc(name);
 255         if (!s)
 256                 return UBUS_STATUS_UNKNOWN_ERROR;
 257
 258         ret = service_update(s, tb, add);
 259         if (ret)
 260                 return ret;
 261
 262         avl_insert(&services, &s->avl);
 263
 264         service_event("service.start", s->name, NULL);
 265
 266         return 0;
 267 }
 268
 269 static void
 270 service_dump(struct service *s, bool verbose)
 271 {
 272         struct service_instance *in;
 273         void *c, *i;
 274
 275         c = blobmsg_open_table(&b, s->name);
 276
 277         if (!avl_is_empty(&s->instances.avl)) {
 278                 i = blobmsg_open_table(&b, "instances");
 279                 vlist_for_each_element(&s->instances, in, node)
 280                         instance_dump(&b, in, verbose);
 281                 blobmsg_close_table(&b, i);
 282         }
 283         if (verbose && s->trigger)
 284                 blobmsg_add_blob(&b, s->trigger);
 285         if (verbose && !list_empty(&s->validators))
 286                 service_validate_dump(&b, s);
 287         blobmsg_close_table(&b, c);
 288 }
 289
 290 static int
 291 service_handle_list(struct ubus_context *ctx, struct ubus_object *obj,
 292                     struct ubus_request_data *req, const char *method,
 293                     struct blob_attr *msg)
 294 {
 295         struct blob_attr *tb[__SERVICE_LIST_ATTR_MAX];
 296         struct service *s;
 297         const char *name = NULL;
 298         bool verbose = false;
 299
 300         blobmsg_parse(service_list_attrs, __SERVICE_LIST_ATTR_MAX, tb, blob_data(msg), blob_len(msg));
 301
 302         if (tb[SERVICE_LIST_ATTR_VERBOSE])
 303                 verbose = blobmsg_get_bool(tb[SERVICE_LIST_ATTR_VERBOSE]);
 304         if (tb[SERVICE_LIST_ATTR_NAME])
 305                 name = blobmsg_get_string(tb[SERVICE_LIST_ATTR_NAME]);
 306
 307         blob_buf_init(&b, 0);
 308         avl_for_each_element(&services, s, avl) {
 309                 if (name && strcmp(s->name, name) != 0)
 310                         continue;
 311
 312                 service_dump(s, verbose);
 313         }
 314
 315         ubus_send_reply(ctx, req, b.head);
 316
 317         return 0;
 318 }
 319
 320 static int
 321 service_handle_delete(struct ubus_context *ctx, struct ubus_object *obj,
 322                     struct ubus_request_data *req, const char *method,
 323                     struct blob_attr *msg)
 324 {
 325         struct blob_attr *tb[__SERVICE_DEL_ATTR_MAX], *cur;
 326         struct service *s;
 327         struct service_instance *in;
 328
 329         blobmsg_parse(service_del_attrs, __SERVICE_DEL_ATTR_MAX, tb, blob_data(msg), blob_len(msg));
 330
 331         cur = tb[SERVICE_DEL_ATTR_NAME];
 332         if (!cur)
 333                 return UBUS_STATUS_NOT_FOUND;
 334
 335         s = avl_find_element(&services, blobmsg_data(cur), s, avl);
 336         if (!s)
 337                 return UBUS_STATUS_NOT_FOUND;
 338
 339         cur = tb[SERVICE_DEL_ATTR_INSTANCE];
 340         if (!cur) {
 341                 service_delete(s);
 342                 return 0;
 343         }
 344
 345         in = vlist_find(&s->instances, blobmsg_data(cur), in, node);
 346         if (!in) {
 347                 ERROR("instance %s not found\n", (char *) blobmsg_data(cur));
 348                 return UBUS_STATUS_NOT_FOUND;
 349         }
 350
 351         vlist_delete(&s->instances, &in->node);
 352
 353         return 0;
 354 }
 355
 356 static int
 357 service_handle_update(struct ubus_context *ctx, struct ubus_object *obj,
 358                       struct ubus_request_data *req, const char *method,
 359                       struct blob_attr *msg)
 360 {
 361         struct blob_attr *tb[__SERVICE_ATTR_MAX], *cur;
 362         struct service *s;
 363
 364         blobmsg_parse(service_attrs, __SERVICE_ATTR_MAX, tb, blob_data(msg), blob_len(msg));
 365
 366         cur = tb[SERVICE_SET_NAME];
 367         if (!cur)
 368                 return UBUS_STATUS_INVALID_ARGUMENT;
 369
 370         s = avl_find_element(&services, blobmsg_data(cur), s, avl);
 371         if (!s)
 372                 return UBUS_STATUS_NOT_FOUND;
 373
 374         if (!strcmp(method, "update_start"))
 375                 vlist_update(&s->instances);
 376         else
 377                 vlist_flush(&s->instances);
 378
 379         return 0;
 380 }
 381
 382 static int
 383 service_handle_event(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[__EVENT_MAX];
 388
 389         if (!msg)
 390                 return UBUS_STATUS_INVALID_ARGUMENT;
 391
 392         blobmsg_parse(event_policy, __EVENT_MAX, tb, blob_data(msg), blob_len(msg));
 393         if (!tb[EVENT_TYPE] || !tb[EVENT_DATA])
 394                 return UBUS_STATUS_INVALID_ARGUMENT;
 395
 396         trigger_event(blobmsg_get_string(tb[EVENT_TYPE]), tb[EVENT_DATA]);
 397
 398         return 0;
 399 }
 400
 401 static int
 402 service_handle_validate(struct ubus_context *ctx, struct ubus_object *obj,
 403                         struct ubus_request_data *req, const char *method,
 404                         struct blob_attr *msg)
 405 {
 406         struct blob_attr *tb[__VALIDATE_MAX];
 407         char *p = NULL, *t = NULL;
 408
 409         if (!msg)
 410                 return UBUS_STATUS_INVALID_ARGUMENT;
 411
 412         blobmsg_parse(validate_policy, __VALIDATE_MAX, tb, blob_data(msg), blob_len(msg));
 413         if (tb[VALIDATE_SERVICE]) {
 414                 return 0;
 415         }
 416         if (tb[VALIDATE_PACKAGE])
 417                 p = blobmsg_get_string(tb[VALIDATE_PACKAGE]);
 418
 419         if (tb[VALIDATE_TYPE])
 420                 t = blobmsg_get_string(tb[VALIDATE_TYPE]);
 421
 422         blob_buf_init(&b, 0);
 423         service_validate_dump_all(&b, p, t);
 424         ubus_send_reply(ctx, req, b.head);
 425
 426         return 0;
 427 }
 428
 429 static int
 430 service_get_data(struct ubus_context *ctx, struct ubus_object *obj,
 431                  struct ubus_request_data *req, const char *method,
 432                  struct blob_attr *msg)
 433 {
 434         struct service_instance *in;
 435         struct service *s;
 436         struct blob_attr *tb[__DATA_MAX];
 437         const char *name = NULL;
 438         const char *instance = NULL;
 439         const char *type = NULL;
 440
 441         blobmsg_parse(get_data_policy, __DATA_MAX, tb, blob_data(msg), blob_len(msg));
 442         if (tb[DATA_NAME])
 443                 name = blobmsg_data(tb[DATA_NAME]);
 444         if (tb[DATA_INSTANCE])
 445                 instance = blobmsg_data(tb[DATA_INSTANCE]);
 446         if (tb[DATA_TYPE])
 447                 type = blobmsg_data(tb[DATA_TYPE]);
 448
 449         blob_buf_init(&b, 0);
 450         avl_for_each_element(&services, s, avl) {
 451                 void *cs = NULL;
 452
 453                 if (name && strcmp(name, s->name))
 454                         continue;
 455
 456                 vlist_for_each_element(&s->instances, in, node) {
 457                         struct blobmsg_list_node *var;
 458                         void *ci = NULL;
 459
 460                         if (instance && strcmp(instance, in->name))
 461                                 continue;
 462
 463                         blobmsg_list_for_each(&in->data, var) {
 464                                 if (type &&
 465                                     strcmp(blobmsg_name(var->data), type))
 466                                         continue;
 467
 468                                 if (!cs)
 469                                         cs = blobmsg_open_table(&b, s->name);
 470                                 if (!ci)
 471                                         ci = blobmsg_open_table(&b, in->name);
 472
 473                                 blobmsg_add_blob(&b, var->data);
 474                         }
 475
 476                         if (ci)
 477                                 blobmsg_close_table(&b, ci);
 478                 }
 479
 480                 if (cs)
 481                         blobmsg_close_table(&b, cs);
 482         }
 483
 484         ubus_send_reply(ctx, req, b.head);
 485         return 0;
 486 }
 487
 488 static struct ubus_method main_object_methods[] = {
 489         UBUS_METHOD("set", service_handle_set, service_set_attrs),
 490         UBUS_METHOD("add", service_handle_set, service_set_attrs),
 491         UBUS_METHOD("list", service_handle_list, service_list_attrs),
 492         UBUS_METHOD("delete", service_handle_delete, service_del_attrs),
 493         UBUS_METHOD("update_start", service_handle_update, service_attrs),
 494         UBUS_METHOD("update_complete", service_handle_update, service_attrs),
 495         UBUS_METHOD("event", service_handle_event, event_policy),
 496         UBUS_METHOD("validate", service_handle_validate, validate_policy),
 497         UBUS_METHOD("get_data", service_get_data, get_data_policy),
 498 };
 499
 500 static struct ubus_object_type main_object_type =
 501         UBUS_OBJECT_TYPE("service", main_object_methods);
 502
 503 static struct ubus_object main_object = {
 504         .name = "service",
 505         .type = &main_object_type,
 506         .methods = main_object_methods,
 507         .n_methods = ARRAY_SIZE(main_object_methods),
 508 };
 509
 510 int
 511 service_start_early(char *name, char *cmdline)
 512 {
 513         void *instances, *instance, *command, *respawn;
 514         char *t;
 515
 516         blob_buf_init(&b, 0);
 517         blobmsg_add_string(&b, "name", name);
 518         instances = blobmsg_open_table(&b, "instances");
 519         instance = blobmsg_open_table(&b, "instance1");
 520         command = blobmsg_open_array(&b, "command");
 521         t = strtok(cmdline, " ");
 522         while (t) {
 523                 blobmsg_add_string(&b, NULL, t);
 524                 t = strtok(NULL, " ");
 525         }
 526         blobmsg_close_array(&b, command);
 527         respawn = blobmsg_open_array(&b, "respawn");
 528         blobmsg_add_string(&b, NULL, "3600");
 529         blobmsg_add_string(&b, NULL, "1");
 530         blobmsg_add_string(&b, NULL, "0");
 531         blobmsg_close_array(&b, respawn);
 532         blobmsg_close_table(&b, instance);
 533         blobmsg_close_table(&b, instances);
 534
 535         return service_handle_set(NULL, NULL, NULL, "add", b.head);
 536 }
 537
 538 void service_event(const char *type, const char *service, const char *instance)
 539 {
 540         if (!ctx)
 541                 return;
 542
 543         blob_buf_init(&b, 0);
 544         blobmsg_add_string(&b, "service", service);
 545         if (instance)
 546                 blobmsg_add_string(&b, "instance", instance);
 547         ubus_notify(ctx, &main_object, type, b.head, -1);
 548 }
 549
 550 void ubus_init_service(struct ubus_context *_ctx)
 551 {
 552         ctx = _ctx;
 553         ubus_add_object(ctx, &main_object);
 554 }