| 1 | // SPDX-License-Identifier: GPL-3.0-or-later |
| 2 | |
| 3 | #include "stream-path.h" |
| 4 | #include "stream.h" |
| 5 | #include "stream-receiver-internals.h" |
| 6 | #include "stream-sender-internals.h" |
| 7 | #include "plugins.d/pluginsd_internals.h" |
| 8 | |
| 9 | typedef enum __attribute__((packed)) { |
| 10 | STREAM_PATH_FLAG_NONE = 0, |
| 11 | STREAM_PATH_FLAG_ACLK = (1 << 0), |
| 12 | STREAM_PATH_FLAG_HEALTH = (1 << 1), |
| 13 | STREAM_PATH_FLAG_ML = (1 << 2), |
| 14 | STREAM_PATH_FLAG_EPHEMERAL = (1 << 3), |
| 15 | STREAM_PATH_FLAG_VIRTUAL = (1 << 4), |
| 16 | } STREAM_PATH_FLAGS; |
| 17 | |
| 18 | typedef struct stream_path { |
| 19 | STRING *hostname; // the hostname of the agent |
| 20 | ND_UUID host_id; // the machine guid of the agent |
| 21 | ND_UUID node_id; // the cloud node id of the agent |
| 22 | ND_UUID claim_id; // the cloud claim id of the agent |
| 23 | time_t since; // the timestamp of the last update |
| 24 | time_t first_time_t; // the oldest timestamp in the db |
| 25 | int16_t hops; // -1 = stale node, 0 = localhost, >0 the hops count |
| 26 | STREAM_PATH_FLAGS flags; // ACLK or NONE for the moment |
| 27 | STREAM_CAPABILITIES capabilities; // streaming connection capabilities |
| 28 | uint32_t start_time_ms; // median time in ms the agent needs to start |
| 29 | uint32_t shutdown_time_ms; // median time in ms the agent needs to shutdown |
| 30 | } STREAM_PATH; |
| 31 | |
| 32 | ENUM_STR_MAP_DEFINE(STREAM_PATH_FLAGS) = { |
| 33 | { .id = STREAM_PATH_FLAG_ACLK, .name = "aclk" }, |
| 34 | { .id = STREAM_PATH_FLAG_HEALTH, .name = "health" }, |
| 35 | { .id = STREAM_PATH_FLAG_ML, .name = "ml" }, |
| 36 | { .id = STREAM_PATH_FLAG_EPHEMERAL, .name = "ephemeral" }, |
| 37 | { .id = STREAM_PATH_FLAG_VIRTUAL, .name = "virtual" }, |
| 38 | |
| 39 | // terminator |
| 40 | { . id = 0, .name = NULL } |
| 41 | }; |
| 42 | |
| 43 | BITMAP_STR_DEFINE_FUNCTIONS(STREAM_PATH_FLAGS, STREAM_PATH_FLAG_NONE, ""); |
| 44 | |
| 45 | static void stream_path_cleanup(STREAM_PATH *p) { |
| 46 | string_freez(p->hostname); |
| 47 | p->hostname = NULL; |
| 48 | p->host_id = UUID_ZERO; |
| 49 | p->node_id = UUID_ZERO; |
| 50 | p->claim_id = UUID_ZERO; |
| 51 | p->hops = 0; |
| 52 | p->since = 0; |
| 53 | p->first_time_t = 0; |
| 54 | p->capabilities = 0; |
| 55 | p->flags = STREAM_PATH_FLAG_NONE; |
| 56 | p->start_time_ms = 0; |
| 57 | p->shutdown_time_ms = 0; |
| 58 | } |
| 59 | |
| 60 | static void rrdhost_stream_path_clear_unsafe(RRDHOST *host, bool destroy) { |
| 61 | for(size_t i = 0; i < host->stream.path.used ; i++) |
| 62 | stream_path_cleanup(&host->stream.path.array[i]); |
| 63 | |
| 64 | host->stream.path.used = 0; |
| 65 | |
| 66 | if(destroy) { |
| 67 | freez(host->stream.path.array); |
| 68 | host->stream.path.array = NULL; |
| 69 | host->stream.path.size = 0; |
| 70 | } |
| 71 | } |
| 72 | |
| 73 | void rrdhost_stream_path_clear(RRDHOST *host, bool destroy) { |
| 74 | rw_spinlock_write_lock(&host->stream.path.spinlock); |
| 75 | rrdhost_stream_path_clear_unsafe(host, destroy); |
| 76 | rw_spinlock_write_unlock(&host->stream.path.spinlock); |
| 77 | } |
| 78 | |
| 79 | static void stream_path_to_json_object(BUFFER *wb, STREAM_PATH *p) { |
| 80 | buffer_json_add_array_item_object(wb); |
| 81 | { |
| 82 | buffer_json_member_add_uint64(wb, "version", 1); |
| 83 | buffer_json_member_add_string(wb, "hostname", string2str(p->hostname)); |
| 84 | buffer_json_member_add_uuid(wb, "host_id", p->host_id.uuid); |
| 85 | buffer_json_member_add_uuid(wb, "node_id", p->node_id.uuid); |
| 86 | buffer_json_member_add_uuid(wb, "claim_id", p->claim_id.uuid); |
| 87 | buffer_json_member_add_int64(wb, "hops", p->hops); |
| 88 | buffer_json_member_add_uint64(wb, "since", p->since); |
| 89 | buffer_json_member_add_uint64(wb, "first_time_t", p->first_time_t); |
| 90 | buffer_json_member_add_uint64(wb, "start_time", p->start_time_ms); |
| 91 | buffer_json_member_add_uint64(wb, "shutdown_time", p->shutdown_time_ms); |
| 92 | stream_capabilities_to_json_array(wb, p->capabilities, "capabilities"); |
| 93 | STREAM_PATH_FLAGS_2json(wb, "flags", p->flags); |
| 94 | } |
| 95 | buffer_json_object_close(wb); |
| 96 | } |
| 97 | |
| 98 | static STREAM_PATH rrdhost_stream_path_self(RRDHOST *host) { |
| 99 | STREAM_PATH p = { 0 }; |
| 100 | |
| 101 | bool is_localhost = host == localhost || rrdhost_option_check(host, RRDHOST_OPTION_VIRTUAL_HOST); |
| 102 | |
| 103 | p.hostname = string_dup(localhost->hostname); |
| 104 | p.host_id = localhost->host_id; |
| 105 | p.node_id = localhost->node_id; |
| 106 | p.claim_id = claim_id_get_uuid(); |
| 107 | p.start_time_ms = get_agent_event_time_median(EVENT_AGENT_START_TIME) / USEC_PER_MS; |
| 108 | p.shutdown_time_ms = get_agent_event_time_median(EVENT_AGENT_SHUTDOWN_TIME) / USEC_PER_MS; |
| 109 | |
| 110 | p.flags = STREAM_PATH_FLAG_NONE; |
| 111 | if(!UUIDiszero(p.claim_id)) |
| 112 | p.flags |= STREAM_PATH_FLAG_ACLK; |
| 113 | |
| 114 | if(rrdhost_option_check(host, RRDHOST_OPTION_EPHEMERAL_HOST)) |
| 115 | p.flags |= STREAM_PATH_FLAG_EPHEMERAL; |
| 116 | |
| 117 | if(rrdhost_option_check(host, RRDHOST_OPTION_VIRTUAL_HOST)) |
| 118 | p.flags |= STREAM_PATH_FLAG_VIRTUAL; |
| 119 | |
| 120 | if(host->health.enabled) |
| 121 | p.flags |= STREAM_PATH_FLAG_HEALTH; |
| 122 | |
| 123 | if(ml_enabled(host)) |
| 124 | p.flags |= STREAM_PATH_FLAG_ML; |
| 125 | |
| 126 | rrdhost_receiver_lock(host); |
| 127 | if(host->receiver) { |
| 128 | p.hops = (int16_t)host->receiver->hops; |
| 129 | p.since = host->receiver->connected_since_s; |
| 130 | } |
| 131 | else { |
| 132 | p.hops = (is_localhost) ? 0 : -1; // -1 for stale nodes |
| 133 | p.since = netdata_start_time; |
| 134 | } |
| 135 | rrdhost_receiver_unlock(host); |
| 136 | |
| 137 | // the following may get the receiver lock again! |
| 138 | p.capabilities = stream_our_capabilities(host, true); |
| 139 | |
| 140 | rrdhost_retention(host, 0, false, &p.first_time_t, NULL); |
| 141 | |
| 142 | return p; |
| 143 | } |
| 144 | |
| 145 | uint64_t rrdhost_stream_path_total_reboot_time_ms(RRDHOST *host) { |
| 146 | uint64_t total_ms = 0; |
| 147 | |
| 148 | rw_spinlock_read_lock(&host->stream.path.spinlock); |
| 149 | for (size_t i = 0; i < host->stream.path.used; i++) { |
| 150 | STREAM_PATH *tmp_path = &host->stream.path.array[i]; |
| 151 | if(UUIDeq(host->host_id, tmp_path->host_id)) { |
| 152 | total_ms = tmp_path->start_time_ms + tmp_path->shutdown_time_ms; |
| 153 | break; |
| 154 | } |
| 155 | } |
| 156 | rw_spinlock_read_unlock(&host->stream.path.spinlock); |
| 157 | return total_ms; |
| 158 | } |
| 159 | |
| 160 | bool rrdhost_is_host_in_stream_path_before_us(struct rrdhost *host, ND_UUID remote_agent_host_id, int16_t our_hops) { |
| 161 | if(UUIDiszero(remote_agent_host_id)) return false; |
| 162 | if(UUIDeq(localhost->host_id, remote_agent_host_id)) return true; |
| 163 | |
| 164 | bool rc = false; |
| 165 | rw_spinlock_read_lock(&host->stream.path.spinlock); |
| 166 | for (size_t i = 0; i < host->stream.path.used; i++) { |
| 167 | STREAM_PATH *p = &host->stream.path.array[i]; |
| 168 | if(UUIDeq(remote_agent_host_id, p->host_id) && p->hops < our_hops) { |
| 169 | rc = true; |
| 170 | break; |
| 171 | } |
| 172 | } |
| 173 | rw_spinlock_read_unlock(&host->stream.path.spinlock); |
| 174 | return rc; |
| 175 | } |
| 176 | |
| 177 | void rrdhost_stream_path_to_json(BUFFER *wb, struct rrdhost *host, const char *key, bool add_version) { |
| 178 | if(add_version) |
| 179 | buffer_json_member_add_uint64(wb, "version", 1); |
| 180 | |
| 181 | STREAM_PATH tmp = rrdhost_stream_path_self(host); |
| 182 | |
| 183 | rw_spinlock_read_lock(&host->stream.path.spinlock); |
| 184 | buffer_json_member_add_array(wb, key); |
| 185 | { |
| 186 | { |
| 187 | bool found_self = false; |
| 188 | for (size_t i = 0; i < host->stream.path.used; i++) { |
| 189 | STREAM_PATH *p = &host->stream.path.array[i]; |
| 190 | if(UUIDeq(localhost->host_id, p->host_id)) { |
| 191 | // this is us, use the current data |
| 192 | p = &tmp; |
| 193 | found_self = true; |
| 194 | } |
| 195 | stream_path_to_json_object(wb, p); |
| 196 | } |
| 197 | |
| 198 | if(!found_self) { |
| 199 | // we didn't find ourselves in the list. |
| 200 | // append us. |
| 201 | stream_path_to_json_object(wb, &tmp); |
| 202 | } |
| 203 | } |
| 204 | } |
| 205 | buffer_json_array_close(wb); // key |
| 206 | rw_spinlock_read_unlock(&host->stream.path.spinlock); |
| 207 | |
| 208 | stream_path_cleanup(&tmp); |
| 209 | } |
| 210 | |
| 211 | static BUFFER *stream_path_payload(RRDHOST *host) { |
| 212 | BUFFER *wb = buffer_create(0, NULL); |
| 213 | buffer_json_initialize(wb, "\"", "\"", 0, true, BUFFER_JSON_OPTIONS_MINIFY); |
| 214 | rrdhost_stream_path_to_json(wb, host, STREAM_PATH_JSON_MEMBER, true); |
| 215 | buffer_json_finalize(wb); |
| 216 | return wb; |
| 217 | } |
| 218 | |
| 219 | void stream_path_send_to_parent(RRDHOST *host) { |
| 220 | struct sender_state *s = host->sender; |
| 221 | if(!s || |
| 222 | !stream_has_capability(s, STREAM_CAP_PATHS) || |
| 223 | !rrdhost_can_stream_metadata_to_parent(host)) |
| 224 | return; |
| 225 | |
| 226 | CLEAN_BUFFER *payload = stream_path_payload(host); |
| 227 | CLEAN_BUFFER *wb = buffer_create(0, NULL); |
| 228 | buffer_sprintf(wb, PLUGINSD_KEYWORD_JSON " " PLUGINSD_KEYWORD_JSON_CMD_STREAM_PATH "\n%s\n" PLUGINSD_KEYWORD_JSON_END "\n", buffer_tostring(payload)); |
| 229 | sender_commit_clean_buffer(s, wb, STREAM_TRAFFIC_TYPE_METADATA); |
| 230 | } |
| 231 | |
| 232 | void stream_path_send_to_child(RRDHOST *host) { |
| 233 | if(host == localhost) |
| 234 | return; |
| 235 | |
| 236 | CLEAN_BUFFER *payload = stream_path_payload(host); |
| 237 | |
| 238 | rrdhost_receiver_lock(host); |
| 239 | if(stream_has_capability(host->receiver, STREAM_CAP_PATHS) && |
| 240 | rrdhost_flag_check(host, RRDHOST_FLAG_COLLECTOR_ONLINE)) { |
| 241 | |
| 242 | CLEAN_BUFFER *wb = buffer_create(0, NULL); |
| 243 | buffer_sprintf(wb, PLUGINSD_KEYWORD_JSON " " PLUGINSD_KEYWORD_JSON_CMD_STREAM_PATH "\n%s\n" PLUGINSD_KEYWORD_JSON_END "\n", buffer_tostring(payload)); |
| 244 | send_to_plugin(buffer_tostring(wb), __atomic_load_n(&host->receiver->thread.parser, __ATOMIC_RELAXED), STREAM_TRAFFIC_TYPE_METADATA); |
| 245 | } |
| 246 | rrdhost_receiver_unlock(host); |
| 247 | } |
| 248 | |
| 249 | uint16_t rrdhost_stream_path_get_host_ids(struct rrdhost *host, uint16_t from, ND_UUID *host_ids, uint16_t max) { |
| 250 | if(!host || !host_ids || !max) |
| 251 | return 0; |
| 252 | |
| 253 | uint16_t count = 0; |
| 254 | rw_spinlock_read_lock(&host->stream.path.spinlock); |
| 255 | for(uint16_t i = from; i < host->stream.path.used && count < max; i++) |
| 256 | host_ids[count++] = host->stream.path.array[i].host_id; |
| 257 | rw_spinlock_read_unlock(&host->stream.path.spinlock); |
| 258 | return count; |
| 259 | } |
| 260 | |
| 261 | uint16_t rrdhost_stream_path_visit(struct rrdhost *host, uint16_t from, |
| 262 | stream_path_visit_cb cb, void *userdata) { |
| 263 | if(!host || !cb) |
| 264 | return 0; |
| 265 | |
| 266 | uint16_t count = 0; |
| 267 | rw_spinlock_read_lock(&host->stream.path.spinlock); |
| 268 | for(uint16_t i = from; i < host->stream.path.used; i++) { |
| 269 | STREAM_PATH *p = &host->stream.path.array[i]; |
| 270 | bool keep_going = cb(userdata, i, |
| 271 | p->hostname, |
| 272 | p->host_id, p->node_id, p->claim_id, |
| 273 | p->hops, |
| 274 | p->since, p->first_time_t, |
| 275 | p->start_time_ms, p->shutdown_time_ms, |
| 276 | p->capabilities, |
| 277 | (uint32_t)p->flags); |
| 278 | count++; |
| 279 | if(!keep_going) break; |
| 280 | } |
| 281 | rw_spinlock_read_unlock(&host->stream.path.spinlock); |
| 282 | return count; |
| 283 | } |
| 284 | |
| 285 | void stream_path_child_disconnected(RRDHOST *host) { |
| 286 | rrdhost_stream_path_clear(host, true); |
| 287 | } |
| 288 | |
| 289 | void stream_path_parent_disconnected(RRDHOST *host) { |
| 290 | rw_spinlock_write_lock(&host->stream.path.spinlock); |
| 291 | |
| 292 | size_t cleared = 0; |
| 293 | size_t used = host->stream.path.used; |
| 294 | for (size_t i = 0; i < used; i++) { |
| 295 | STREAM_PATH *p = &host->stream.path.array[i]; |
| 296 | if(UUIDeq(localhost->host_id, p->host_id)) { |
| 297 | host->stream.path.used = i + 1; |
| 298 | |
| 299 | for(size_t j = i + 1; j < used ;j++) { |
| 300 | stream_path_cleanup(&host->stream.path.array[j]); |
| 301 | cleared++; |
| 302 | } |
| 303 | |
| 304 | break; |
| 305 | } |
| 306 | } |
| 307 | |
| 308 | rw_spinlock_write_unlock(&host->stream.path.spinlock); |
| 309 | |
| 310 | if(cleared) |
| 311 | stream_path_send_to_child(host); |
| 312 | } |
| 313 | |
| 314 | void stream_path_retention_updated(RRDHOST *host) { |
| 315 | if(!host || !localhost) return; |
| 316 | stream_path_send_to_parent(host); |
| 317 | stream_path_send_to_child(host); |
| 318 | } |
| 319 | |
| 320 | void stream_path_node_id_updated(RRDHOST *host) { |
| 321 | if(!host || !localhost) return; |
| 322 | stream_path_send_to_parent(host); |
| 323 | stream_path_send_to_child(host); |
| 324 | } |
| 325 | |
| 326 | // -------------------------------------------------------------------------------------------------------------------- |
| 327 | |
| 328 | |
| 329 | static bool parse_single_path(json_object *jobj, const char *path, STREAM_PATH *p, BUFFER *error) { |
| 330 | uint32_t version = 0; |
| 331 | JSONC_PARSE_UINT64_OR_ERROR_AND_RETURN(jobj, path, "version", version, error, JSONC_OPTIONAL); |
| 332 | |
| 333 | JSONC_PARSE_TXT2STRING_OR_ERROR_AND_RETURN(jobj, path, "hostname", p->hostname, error, JSONC_REQUIRED); |
| 334 | JSONC_PARSE_TXT2UUID_OR_ERROR_AND_RETURN(jobj, path, "host_id", p->host_id.uuid, error, JSONC_REQUIRED); |
| 335 | JSONC_PARSE_TXT2UUID_OR_ERROR_AND_RETURN(jobj, path, "node_id", p->node_id.uuid, error, JSONC_REQUIRED); |
| 336 | JSONC_PARSE_TXT2UUID_OR_ERROR_AND_RETURN(jobj, path, "claim_id", p->claim_id.uuid, error, JSONC_REQUIRED); |
| 337 | JSONC_PARSE_INT64_OR_ERROR_AND_RETURN(jobj, path, "hops", p->hops, error, JSONC_REQUIRED); |
| 338 | JSONC_PARSE_UINT64_OR_ERROR_AND_RETURN(jobj, path, "since", p->since, error, JSONC_REQUIRED); |
| 339 | JSONC_PARSE_UINT64_OR_ERROR_AND_RETURN(jobj, path, "first_time_t", p->first_time_t, error, JSONC_REQUIRED); |
| 340 | JSONC_PARSE_INT64_OR_ERROR_AND_RETURN(jobj, path, "start_time", p->start_time_ms, error, JSONC_REQUIRED); |
| 341 | JSONC_PARSE_INT64_OR_ERROR_AND_RETURN(jobj, path, "shutdown_time", p->shutdown_time_ms, error, JSONC_REQUIRED); |
| 342 | JSONC_PARSE_ARRAY_OF_TXT2BITMAP_OR_ERROR_AND_RETURN(jobj, path, "flags", STREAM_PATH_FLAGS_2id_one, p->flags, error, JSONC_OPTIONAL); |
| 343 | JSONC_PARSE_ARRAY_OF_TXT2BITMAP_OR_ERROR_AND_RETURN(jobj, path, "capabilities", stream_capabilities_parse_one, p->capabilities, error, JSONC_OPTIONAL); |
| 344 | |
| 345 | if(!p->hostname) { |
| 346 | buffer_strcat(error, "hostname cannot be empty"); |
| 347 | return false; |
| 348 | } |
| 349 | |
| 350 | if(UUIDiszero(p->host_id)) { |
| 351 | buffer_strcat(error, "host_id cannot be zero"); |
| 352 | return false; |
| 353 | } |
| 354 | |
| 355 | if(p->hops < 0) { |
| 356 | buffer_strcat(error, "hops cannot be negative (probably the child disconnected from the Netdata before us"); |
| 357 | return false; |
| 358 | } |
| 359 | |
| 360 | if(p->capabilities == STREAM_CAP_NONE) { |
| 361 | buffer_strcat(error, "capabilities cannot be empty"); |
| 362 | return false; |
| 363 | } |
| 364 | |
| 365 | if(p->since <= 0) { |
| 366 | buffer_strcat(error, "since cannot be <= 0"); |
| 367 | return false; |
| 368 | } |
| 369 | |
| 370 | return true; |
| 371 | } |
| 372 | |
| 373 | static XXH128_hash_t stream_path_hash_unsafe(RRDHOST *host) { |
| 374 | if(!host->stream.path.used) |
| 375 | return (XXH128_hash_t){ 0 }; |
| 376 | |
| 377 | return XXH3_128bits(host->stream.path.array, sizeof(*host->stream.path.array) * host->stream.path.used); |
| 378 | } |
| 379 | |
| 380 | static int compare_by_hops(const void *a, const void *b) { |
| 381 | const STREAM_PATH *path1 = a; |
| 382 | const STREAM_PATH *path2 = b; |
| 383 | |
| 384 | if (path1->hops < path2->hops) |
| 385 | return -1; |
| 386 | else if (path1->hops > path2->hops) |
| 387 | return 1; |
| 388 | |
| 389 | return 0; |
| 390 | } |
| 391 | |
| 392 | bool stream_path_set_from_json(RRDHOST *host, const char *json, bool from_parent) { |
| 393 | if(!json || !*json) |
| 394 | return false; |
| 395 | |
| 396 | CLEAN_JSON_OBJECT *jobj = json_tokener_parse(json); |
| 397 | if(!jobj) { |
| 398 | nd_log(NDLS_DAEMON, NDLP_ERR, |
| 399 | "STREAM PATH '%s': Cannot parse json: %s", |
| 400 | rrdhost_hostname(host), json); |
| 401 | return false; |
| 402 | } |
| 403 | |
| 404 | rw_spinlock_write_lock(&host->stream.path.spinlock); |
| 405 | XXH128_hash_t old_hash = stream_path_hash_unsafe(host); |
| 406 | rrdhost_stream_path_clear_unsafe(host, true); |
| 407 | |
| 408 | CLEAN_BUFFER *error = buffer_create(0, NULL); |
| 409 | |
| 410 | json_object *_jarray; |
| 411 | if (json_object_object_get_ex(jobj, STREAM_PATH_JSON_MEMBER, &_jarray) && |
| 412 | json_object_is_type(_jarray, json_type_array)) { |
| 413 | size_t items = json_object_array_length(_jarray); |
| 414 | host->stream.path.array = callocz(items, sizeof(*host->stream.path.array)); |
| 415 | host->stream.path.size = items; |
| 416 | |
| 417 | for (size_t i = 0; i < items; ++i) { |
| 418 | json_object *joption = json_object_array_get_idx(_jarray, i); |
| 419 | if (!json_object_is_type(joption, json_type_object)) { |
| 420 | nd_log(NDLS_DAEMON, NDLP_ERR, |
| 421 | "STREAM PATH '%s': Array item No %zu is not an object: %s", |
| 422 | rrdhost_hostname(host), i, json); |
| 423 | continue; |
| 424 | } |
| 425 | |
| 426 | if(!parse_single_path(joption, "", &host->stream.path.array[host->stream.path.used], error)) { |
| 427 | stream_path_cleanup(&host->stream.path.array[host->stream.path.used]); |
| 428 | nd_log(NDLS_DAEMON, NDLP_ERR, |
| 429 | "STREAM PATH '%s': Array item No %zu cannot be parsed: %s: %s", |
| 430 | rrdhost_hostname(host), i, buffer_tostring(error), json); |
| 431 | } |
| 432 | else |
| 433 | host->stream.path.used++; |
| 434 | } |
| 435 | } |
| 436 | |
| 437 | if(host->stream.path.used > 1) { |
| 438 | // sorting is required in order to support stream_path_parent_disconnected() |
| 439 | qsort(host->stream.path.array, host->stream.path.used, |
| 440 | sizeof(*host->stream.path.array), compare_by_hops); |
| 441 | } |
| 442 | |
| 443 | XXH128_hash_t new_hash = stream_path_hash_unsafe(host); |
| 444 | rw_spinlock_write_unlock(&host->stream.path.spinlock); |
| 445 | |
| 446 | if(!XXH128_isEqual(old_hash, new_hash)) { |
| 447 | if(!from_parent) |
| 448 | stream_path_send_to_parent(host); |
| 449 | |
| 450 | // when it comes from the child, we still need to send it back to the child |
| 451 | // including our own entry in it. |
| 452 | stream_path_send_to_child(host); |
| 453 | } |
| 454 | |
| 455 | return host->stream.path.used > 0; |
| 456 | } |
| 457 | |
| 458 | void rrdhost_stream_path_init(RRDHOST *host) { |
| 459 | rw_spinlock_init(&host->stream.path.spinlock); |
| 460 | } |