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_VERBOSE,
 183         __SERVICE_LIST_ATTR_MAX,
 184 };
 185
 186 static const struct blobmsg_policy service_list_attrs[__SERVICE_LIST_ATTR_MAX] = {
 187         [SERVICE_LIST_ATTR_VERBOSE] = { "verbose", BLOBMSG_TYPE_BOOL },
 188 };
 189
 190 enum {
 191         EVENT_TYPE,
 192         EVENT_DATA,
 193         __EVENT_MAX
 194 };
 195
 196 static const struct blobmsg_policy event_policy[__EVENT_MAX] = {
 197         [EVENT_TYPE] = { .name = "type", .type = BLOBMSG_TYPE_STRING },
 198         [EVENT_DATA] = { .name = "data", .type = BLOBMSG_TYPE_TABLE },
 199 };
 200
 201 enum {
 202         VALIDATE_PACKAGE,
 203         VALIDATE_TYPE,
 204         VALIDATE_SERVICE,
 205         __VALIDATE_MAX
 206 };
 207
 208 static const struct blobmsg_policy validate_policy[__VALIDATE_MAX] = {
 209         [VALIDATE_PACKAGE] = { .name = "package", .type = BLOBMSG_TYPE_STRING },
 210         [VALIDATE_TYPE] = { .name = "type", .type = BLOBMSG_TYPE_STRING },
 211         [VALIDATE_SERVICE] = { .name = "service", .type = BLOBMSG_TYPE_STRING },
 212 };
 213
 214 static const struct blobmsg_policy get_data_policy[] = {
 215         { "type", BLOBMSG_TYPE_STRING }
 216 };
 217
 218 static int
 219 service_handle_set(struct ubus_context *ctx, struct ubus_object *obj,
 220                    struct ubus_request_data *req, const char *method,
 221                    struct blob_attr *msg)
 222 {
 223         struct blob_attr *tb[__SERVICE_SET_MAX], *cur;
 224         struct service *s = NULL;
 225         const char *name;
 226         bool add = !strcmp(method, "add");
 227         int ret;
 228
 229         blobmsg_parse(service_set_attrs, __SERVICE_SET_MAX, tb, blob_data(msg), blob_len(msg));
 230         cur = tb[SERVICE_ATTR_NAME];
 231         if (!cur)
 232                 return UBUS_STATUS_INVALID_ARGUMENT;
 233
 234         name = blobmsg_data(cur);
 235
 236         s = avl_find_element(&services, name, s, avl);
 237         if (s) {
 238                 DEBUG(2, "Update service %s\n", name);
 239                 return service_update(s, tb, add);
 240         }
 241
 242         DEBUG(2, "Create service %s\n", name);
 243         s = service_alloc(name);
 244         if (!s)
 245                 return UBUS_STATUS_UNKNOWN_ERROR;
 246
 247         ret = service_update(s, tb, add);
 248         if (ret)
 249                 return ret;
 250
 251         avl_insert(&services, &s->avl);
 252
 253         service_event("service.start", s->name, NULL);
 254
 255         return 0;
 256 }
 257
 258 static void
 259 service_dump(struct service *s, int verbose)
 260 {
 261         struct service_instance *in;
 262         void *c, *i;
 263
 264         c = blobmsg_open_table(&b, s->name);
 265
 266         if (!avl_is_empty(&s->instances.avl)) {
 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         }
 272         if (verbose && s->trigger)
 273                 blobmsg_add_blob(&b, s->trigger);
 274         if (verbose && !list_empty(&s->validators))
 275                 service_validate_dump(&b, s);
 276         blobmsg_close_table(&b, c);
 277 }
 278
 279 static int
 280 service_handle_list(struct ubus_context *ctx, struct ubus_object *obj,
 281                     struct ubus_request_data *req, const char *method,
 282                     struct blob_attr *msg)
 283 {
 284         struct blob_attr *tb[__SERVICE_LIST_ATTR_MAX];
 285         struct service *s;
 286         int verbose = 0;
 287
 288         blobmsg_parse(service_list_attrs, __SERVICE_LIST_ATTR_MAX, tb, blob_data(msg), blob_len(msg));
 289
 290         if (tb[SERVICE_LIST_ATTR_VERBOSE] && blobmsg_get_bool(tb[SERVICE_LIST_ATTR_VERBOSE]))
 291                 verbose = 1;
 292
 293         blob_buf_init(&b, 0);
 294         avl_for_each_element(&services, s, avl)
 295                 service_dump(s, verbose);
 296
 297         ubus_send_reply(ctx, req, b.head);
 298
 299         return 0;
 300 }
 301
 302 static int
 303 service_handle_delete(struct ubus_context *ctx, struct ubus_object *obj,
 304                     struct ubus_request_data *req, const char *method,
 305                     struct blob_attr *msg)
 306 {
 307         struct blob_attr *tb[__SERVICE_DEL_ATTR_MAX], *cur;
 308         struct service *s;
 309         struct service_instance *in;
 310
 311         blobmsg_parse(service_del_attrs, __SERVICE_DEL_ATTR_MAX, tb, blob_data(msg), blob_len(msg));
 312
 313         cur = tb[SERVICE_DEL_ATTR_NAME];
 314         if (!cur)
 315                 return UBUS_STATUS_NOT_FOUND;
 316
 317         s = avl_find_element(&services, blobmsg_data(cur), s, avl);
 318         if (!s)
 319                 return UBUS_STATUS_NOT_FOUND;
 320
 321         cur = tb[SERVICE_DEL_ATTR_INSTANCE];
 322         if (!cur) {
 323                 service_delete(s);
 324                 return 0;
 325         }
 326
 327         in = vlist_find(&s->instances, blobmsg_data(cur), in, node);
 328         if (!in) {
 329                 ERROR("instance %s not found\n", (char *) blobmsg_data(cur));
 330                 return UBUS_STATUS_NOT_FOUND;
 331         }
 332
 333         vlist_delete(&s->instances, &in->node);
 334
 335         return 0;
 336 }
 337
 338 static int
 339 service_handle_update(struct ubus_context *ctx, struct ubus_object *obj,
 340                       struct ubus_request_data *req, const char *method,
 341                       struct blob_attr *msg)
 342 {
 343         struct blob_attr *tb[__SERVICE_ATTR_MAX], *cur;
 344         struct service *s;
 345
 346         blobmsg_parse(service_attrs, __SERVICE_ATTR_MAX, tb, blob_data(msg), blob_len(msg));
 347
 348         cur = tb[SERVICE_ATTR_NAME];
 349         if (!cur)
 350                 return UBUS_STATUS_INVALID_ARGUMENT;
 351
 352         s = avl_find_element(&services, blobmsg_data(cur), s, avl);
 353         if (!s)
 354                 return UBUS_STATUS_NOT_FOUND;
 355
 356         if (!strcmp(method, "update_start"))
 357                 vlist_update(&s->instances);
 358         else
 359                 vlist_flush(&s->instances);
 360
 361         return 0;
 362 }
 363
 364 static int
 365 service_handle_event(struct ubus_context *ctx, struct ubus_object *obj,
 366                         struct ubus_request_data *req, const char *method,
 367                         struct blob_attr *msg)
 368 {
 369         struct blob_attr *tb[__EVENT_MAX];
 370
 371         if (!msg)
 372                 return UBUS_STATUS_INVALID_ARGUMENT;
 373
 374         blobmsg_parse(event_policy, __EVENT_MAX, tb, blob_data(msg), blob_len(msg));
 375         if (!tb[EVENT_TYPE] || !tb[EVENT_DATA])
 376                 return UBUS_STATUS_INVALID_ARGUMENT;
 377
 378         trigger_event(blobmsg_get_string(tb[EVENT_TYPE]), tb[EVENT_DATA]);
 379
 380         return 0;
 381 }
 382
 383 static int
 384 service_handle_validate(struct ubus_context *ctx, struct ubus_object *obj,
 385                         struct ubus_request_data *req, const char *method,
 386                         struct blob_attr *msg)
 387 {
 388         struct blob_attr *tb[__VALIDATE_MAX];
 389         char *p = NULL, *t = NULL;
 390
 391         if (!msg)
 392                 return UBUS_STATUS_INVALID_ARGUMENT;
 393
 394         blobmsg_parse(validate_policy, __VALIDATE_MAX, tb, blob_data(msg), blob_len(msg));
 395         if (tb[VALIDATE_SERVICE]) {
 396                 return 0;
 397         }
 398         if (tb[VALIDATE_PACKAGE])
 399                 p = blobmsg_get_string(tb[VALIDATE_PACKAGE]);
 400
 401         if (tb[VALIDATE_TYPE])
 402                 t = blobmsg_get_string(tb[VALIDATE_TYPE]);
 403
 404         blob_buf_init(&b, 0);
 405         service_validate_dump_all(&b, p, t);
 406         ubus_send_reply(ctx, req, b.head);
 407
 408         return 0;
 409 }
 410
 411 static int
 412 service_get_data(struct ubus_context *ctx, struct ubus_object *obj,
 413                  struct ubus_request_data *req, const char *method,
 414                  struct blob_attr *msg)
 415 {
 416         struct service_instance *in;
 417         struct service *s;
 418         struct blob_attr *tb;
 419         const char *type = NULL;
 420
 421         blobmsg_parse(get_data_policy, 1, &tb, blob_data(msg), blob_len(msg));
 422         if (tb)
 423                 type = blobmsg_data(tb);
 424
 425         blob_buf_init(&b, 0);
 426         avl_for_each_element(&services, s, avl) {
 427                 void *cs = NULL;
 428
 429                 vlist_for_each_element(&s->instances, in, node) {
 430                         struct blobmsg_list_node *var;
 431                         void *ci = NULL;
 432
 433                         blobmsg_list_for_each(&in->data, var) {
 434                                 if (type &&
 435                                     strcmp(blobmsg_name(var->data), type) != 0)
 436                                         continue;
 437
 438                                 if (!cs)
 439                                         cs = blobmsg_open_table(&b, s->name);
 440                                 if (!ci)
 441                                         ci = blobmsg_open_table(&b, in->name);
 442
 443                                 blobmsg_add_blob(&b, var->data);
 444                         }
 445
 446                         if (ci)
 447                                 blobmsg_close_table(&b, ci);
 448                 }
 449
 450                 if (cs)
 451                         blobmsg_close_table(&b, cs);
 452         }
 453
 454         ubus_send_reply(ctx, req, b.head);
 455         return 0;
 456 }
 457
 458 static struct ubus_method main_object_methods[] = {
 459         UBUS_METHOD("set", service_handle_set, service_set_attrs),
 460         UBUS_METHOD("add", service_handle_set, service_set_attrs),
 461         UBUS_METHOD("list", service_handle_list, service_attrs),
 462         UBUS_METHOD("delete", service_handle_delete, service_del_attrs),
 463         UBUS_METHOD("update_start", service_handle_update, service_attrs),
 464         UBUS_METHOD("update_complete", service_handle_update, service_attrs),
 465         UBUS_METHOD("event", service_handle_event, event_policy),
 466         UBUS_METHOD("validate", service_handle_validate, validate_policy),
 467         UBUS_METHOD("get_data", service_get_data, get_data_policy),
 468 };
 469
 470 static struct ubus_object_type main_object_type =
 471         UBUS_OBJECT_TYPE("service", main_object_methods);
 472
 473 static struct ubus_object main_object = {
 474         .name = "service",
 475         .type = &main_object_type,
 476         .methods = main_object_methods,
 477         .n_methods = ARRAY_SIZE(main_object_methods),
 478 };
 479
 480 int
 481 service_start_early(char *name, char *cmdline)
 482 {
 483         void *instances, *instance, *command, *respawn;
 484         char *t;
 485
 486         blob_buf_init(&b, 0);
 487         blobmsg_add_string(&b, "name", name);
 488         instances = blobmsg_open_table(&b, "instances");
 489         instance = blobmsg_open_table(&b, "instance1");
 490         command = blobmsg_open_array(&b, "command");
 491         t = strtok(cmdline, " ");
 492         while (t) {
 493                 blobmsg_add_string(&b, NULL, t);
 494                 t = strtok(NULL, " ");
 495         }
 496         blobmsg_close_array(&b, command);
 497         respawn = blobmsg_open_array(&b, "respawn");
 498         blobmsg_add_string(&b, NULL, "3600");
 499         blobmsg_add_string(&b, NULL, "1");
 500         blobmsg_add_string(&b, NULL, "0");
 501         blobmsg_close_array(&b, respawn);
 502         blobmsg_close_table(&b, instance);
 503         blobmsg_close_table(&b, instances);
 504
 505         return service_handle_set(NULL, NULL, NULL, "add", b.head);
 506 }
 507
 508 void service_event(const char *type, const char *service, const char *instance)
 509 {
 510         if (!ctx)
 511                 return;
 512
 513         blob_buf_init(&b, 0);
 514         blobmsg_add_string(&b, "service", service);
 515         if (instance)
 516                 blobmsg_add_string(&b, "instance", instance);
 517         ubus_notify(ctx, &main_object, type, b.head, -1);
 518 }
 519
 520 void ubus_init_service(struct ubus_context *_ctx)
 521 {
 522         ctx = _ctx;
 523         ubus_add_object(ctx, &main_object);
 524 }
 525
 526 void
 527 service_init(void)
 528 {
 529         avl_init(&services, avl_strcmp, false, NULL);
 530         service_validate_init();
 531 }
 532