| 1 | // SPDX-License-Identifier: GPL-3.0-or-later |
| 2 | |
| 3 | #include "ebpf.h" |
| 4 | #include "ebpf_dcstat.h" |
| 5 | #include "libbpf_api/ebpf_library.h" |
| 6 | |
| 7 | static char *dcstat_counter_dimension_name[NETDATA_DCSTAT_IDX_END] = {"ratio", "reference", "slow", "miss"}; |
| 8 | static netdata_syscall_stat_t dcstat_counter_aggregated_data[NETDATA_DCSTAT_IDX_END]; |
| 9 | static netdata_publish_syscall_t dcstat_counter_publish_aggregated[NETDATA_DCSTAT_IDX_END]; |
| 10 | |
| 11 | netdata_dcstat_pid_t *dcstat_vector = NULL; |
| 12 | |
| 13 | static netdata_idx_t dcstat_hash_values[NETDATA_DCSTAT_IDX_END]; |
| 14 | static netdata_idx_t *dcstat_values = NULL; |
| 15 | |
| 16 | struct config dcstat_config = APPCONFIG_INITIALIZER; |
| 17 | |
| 18 | ebpf_local_maps_t dcstat_maps[] = { |
| 19 | {.name = "dcstat_global", |
| 20 | .internal_input = NETDATA_DIRECTORY_CACHE_END, |
| 21 | .user_input = 0, |
| 22 | .type = NETDATA_EBPF_MAP_STATIC, |
| 23 | .map_fd = ND_EBPF_MAP_FD_NOT_INITIALIZED, |
| 24 | #ifdef LIBBPF_MAJOR_VERSION |
| 25 | .map_type = BPF_MAP_TYPE_PERCPU_ARRAY |
| 26 | #endif |
| 27 | }, |
| 28 | {.name = "dcstat_pid", |
| 29 | .internal_input = ND_EBPF_DEFAULT_PID_SIZE, |
| 30 | .user_input = 0, |
| 31 | .type = NETDATA_EBPF_MAP_RESIZABLE | NETDATA_EBPF_MAP_PID, |
| 32 | .map_fd = ND_EBPF_MAP_FD_NOT_INITIALIZED, |
| 33 | #ifdef LIBBPF_MAJOR_VERSION |
| 34 | .map_type = BPF_MAP_TYPE_PERCPU_HASH |
| 35 | #endif |
| 36 | }, |
| 37 | {.name = "dcstat_ctrl", |
| 38 | .internal_input = NETDATA_CONTROLLER_END, |
| 39 | .user_input = 0, |
| 40 | .type = NETDATA_EBPF_MAP_CONTROLLER, |
| 41 | .map_fd = ND_EBPF_MAP_FD_NOT_INITIALIZED, |
| 42 | #ifdef LIBBPF_MAJOR_VERSION |
| 43 | .map_type = BPF_MAP_TYPE_PERCPU_ARRAY |
| 44 | #endif |
| 45 | }, |
| 46 | {.name = NULL, |
| 47 | .internal_input = 0, |
| 48 | .user_input = 0, |
| 49 | .type = NETDATA_EBPF_MAP_CONTROLLER, |
| 50 | .map_fd = ND_EBPF_MAP_FD_NOT_INITIALIZED, |
| 51 | #ifdef LIBBPF_MAJOR_VERSION |
| 52 | .map_type = BPF_MAP_TYPE_PERCPU_ARRAY |
| 53 | #endif |
| 54 | }}; |
| 55 | |
| 56 | static ebpf_specify_name_t dc_optional_name[] = { |
| 57 | {.program_name = "netdata_lookup_fast", |
| 58 | .function_to_attach = "lookup_fast", |
| 59 | .optional = NULL, |
| 60 | .retprobe = CONFIG_BOOLEAN_NO}, |
| 61 | {.program_name = NULL}}; |
| 62 | |
| 63 | netdata_ebpf_targets_t dc_targets[] = { |
| 64 | {.name = "lookup_fast", .mode = EBPF_LOAD_TRAMPOLINE}, |
| 65 | {.name = "d_lookup", .mode = EBPF_LOAD_TRAMPOLINE}, |
| 66 | {.name = NULL, .mode = EBPF_LOAD_TRAMPOLINE}}; |
| 67 | |
| 68 | struct netdata_static_thread ebpf_read_dcstat = { |
| 69 | .name = "EBPF_READ_DCSTAT", |
| 70 | .config_section = NULL, |
| 71 | .config_name = NULL, |
| 72 | .env_name = NULL, |
| 73 | .enabled = 1, |
| 74 | .thread = NULL, |
| 75 | .init_routine = NULL, |
| 76 | .start_routine = NULL}; |
| 77 | |
| 78 | #ifdef LIBBPF_MAJOR_VERSION |
| 79 | /** |
| 80 | * Disable probe |
| 81 | * |
| 82 | * Disable all probes to use exclusively another method. |
| 83 | * |
| 84 | * @param obj is the main structure for bpf objects |
| 85 | */ |
| 86 | static inline void ebpf_dc_disable_probes(struct dc_bpf *obj) |
| 87 | { |
| 88 | bpf_program__set_autoload(obj->progs.netdata_lookup_fast_kprobe, false); |
| 89 | bpf_program__set_autoload(obj->progs.netdata_d_lookup_kretprobe, false); |
| 90 | } |
| 91 | |
| 92 | /* |
| 93 | * Disable trampoline |
| 94 | * |
| 95 | * Disable all trampoline to use exclusively another method. |
| 96 | * |
| 97 | * @param obj is the main structure for bpf objects. |
| 98 | */ |
| 99 | static inline void ebpf_dc_disable_trampoline(struct dc_bpf *obj) |
| 100 | { |
| 101 | bpf_program__set_autoload(obj->progs.netdata_lookup_fast_fentry, false); |
| 102 | bpf_program__set_autoload(obj->progs.netdata_d_lookup_fexit, false); |
| 103 | } |
| 104 | |
| 105 | /** |
| 106 | * Set trampoline target |
| 107 | * |
| 108 | * Set the targets we will monitor. |
| 109 | * |
| 110 | * @param obj is the main structure for bpf objects. |
| 111 | */ |
| 112 | static void ebpf_dc_set_trampoline_target(struct dc_bpf *obj) |
| 113 | { |
| 114 | bpf_program__set_attach_target( |
| 115 | obj->progs.netdata_lookup_fast_fentry, 0, dc_targets[NETDATA_DC_TARGET_LOOKUP_FAST].name); |
| 116 | |
| 117 | bpf_program__set_attach_target(obj->progs.netdata_d_lookup_fexit, 0, dc_targets[NETDATA_DC_TARGET_D_LOOKUP].name); |
| 118 | } |
| 119 | |
| 120 | /** |
| 121 | * Mount Attach Probe |
| 122 | * |
| 123 | * Attach probes to target |
| 124 | * |
| 125 | * @param obj is the main structure for bpf objects. |
| 126 | * |
| 127 | * @return It returns 0 on success and -1 otherwise. |
| 128 | */ |
| 129 | static int ebpf_dc_attach_probes(struct dc_bpf *obj) |
| 130 | { |
| 131 | obj->links.netdata_d_lookup_kretprobe = bpf_program__attach_kprobe( |
| 132 | obj->progs.netdata_d_lookup_kretprobe, true, dc_targets[NETDATA_DC_TARGET_D_LOOKUP].name); |
| 133 | long ret = libbpf_get_error(obj->links.netdata_d_lookup_kretprobe); |
| 134 | if (ret) |
| 135 | return -1; |
| 136 | |
| 137 | char *lookup_name = (dc_optional_name[NETDATA_DC_TARGET_LOOKUP_FAST].optional) ? |
| 138 | dc_optional_name[NETDATA_DC_TARGET_LOOKUP_FAST].optional : |
| 139 | dc_targets[NETDATA_DC_TARGET_LOOKUP_FAST].name; |
| 140 | |
| 141 | obj->links.netdata_lookup_fast_kprobe = |
| 142 | bpf_program__attach_kprobe(obj->progs.netdata_lookup_fast_kprobe, false, lookup_name); |
| 143 | ret = libbpf_get_error(obj->links.netdata_lookup_fast_kprobe); |
| 144 | if (ret) |
| 145 | return -1; |
| 146 | |
| 147 | return 0; |
| 148 | } |
| 149 | |
| 150 | /** |
| 151 | * Adjust Map Size |
| 152 | * |
| 153 | * Resize maps according input from users. |
| 154 | * |
| 155 | * @param obj is the main structure for bpf objects. |
| 156 | * @param em structure with configuration |
| 157 | */ |
| 158 | static void ebpf_dc_adjust_map(struct dc_bpf *obj, ebpf_module_t *em) |
| 159 | { |
| 160 | ebpf_update_map_size( |
| 161 | obj->maps.dcstat_pid, &dcstat_maps[NETDATA_DCSTAT_PID_STATS], em, bpf_map__name(obj->maps.dcstat_pid)); |
| 162 | |
| 163 | ebpf_update_map_type(obj->maps.dcstat_global, &dcstat_maps[NETDATA_DCSTAT_GLOBAL_STATS]); |
| 164 | ebpf_update_map_type(obj->maps.dcstat_pid, &dcstat_maps[NETDATA_DCSTAT_PID_STATS]); |
| 165 | ebpf_update_map_type(obj->maps.dcstat_ctrl, &dcstat_maps[NETDATA_DCSTAT_CTRL]); |
| 166 | } |
| 167 | |
| 168 | /** |
| 169 | * Set hash tables |
| 170 | * |
| 171 | * Set the values for maps according the value given by kernel. |
| 172 | * |
| 173 | * @param obj is the main structure for bpf objects. |
| 174 | */ |
| 175 | static void ebpf_dc_set_hash_tables(struct dc_bpf *obj) |
| 176 | { |
| 177 | dcstat_maps[NETDATA_DCSTAT_GLOBAL_STATS].map_fd = bpf_map__fd(obj->maps.dcstat_global); |
| 178 | dcstat_maps[NETDATA_DCSTAT_PID_STATS].map_fd = bpf_map__fd(obj->maps.dcstat_pid); |
| 179 | dcstat_maps[NETDATA_DCSTAT_CTRL].map_fd = bpf_map__fd(obj->maps.dcstat_ctrl); |
| 180 | } |
| 181 | |
| 182 | /** |
| 183 | * Update Load |
| 184 | * |
| 185 | * For directory cache, some distributions change the function name, and we do not have condition to use |
| 186 | * TRAMPOLINE like other functions. |
| 187 | * |
| 188 | * @param em structure with configuration |
| 189 | * |
| 190 | * @return When then symbols were not modified, it returns TRAMPOLINE, else it returns RETPROBE. |
| 191 | */ |
| 192 | netdata_ebpf_program_loaded_t ebpf_dc_update_load(ebpf_module_t *em) |
| 193 | { |
| 194 | if (dc_optional_name[NETDATA_DC_TARGET_LOOKUP_FAST].optional && |
| 195 | !strcmp( |
| 196 | dc_optional_name[NETDATA_DC_TARGET_LOOKUP_FAST].optional, |
| 197 | dc_optional_name[NETDATA_DC_TARGET_LOOKUP_FAST].function_to_attach)) |
| 198 | return EBPF_LOAD_TRAMPOLINE; |
| 199 | |
| 200 | if (em->targets[NETDATA_DC_TARGET_LOOKUP_FAST].mode != EBPF_LOAD_RETPROBE) |
| 201 | netdata_log_info( |
| 202 | "When your kernel was compiled the symbol %s was modified, instead to use `trampoline`, the plugin will use `probes`.", |
| 203 | dc_optional_name[NETDATA_DC_TARGET_LOOKUP_FAST].function_to_attach); |
| 204 | |
| 205 | return EBPF_LOAD_RETPROBE; |
| 206 | } |
| 207 | |
| 208 | /** |
| 209 | * Load and attach |
| 210 | * |
| 211 | * Load and attach the eBPF code in kernel. |
| 212 | * |
| 213 | * @param obj is the main structure for bpf objects. |
| 214 | * @param em structure with configuration |
| 215 | * |
| 216 | * @return it returns 0 on success and -1 otherwise |
| 217 | */ |
| 218 | static inline int ebpf_dc_load_and_attach(struct dc_bpf *obj, ebpf_module_t *em) |
| 219 | { |
| 220 | netdata_ebpf_program_loaded_t test = ebpf_dc_update_load(em); |
| 221 | if (test == EBPF_LOAD_TRAMPOLINE) { |
| 222 | ebpf_dc_disable_probes(obj); |
| 223 | |
| 224 | ebpf_dc_set_trampoline_target(obj); |
| 225 | } else { |
| 226 | ebpf_dc_disable_trampoline(obj); |
| 227 | } |
| 228 | |
| 229 | ebpf_dc_adjust_map(obj, em); |
| 230 | |
| 231 | int ret = dc_bpf__load(obj); |
| 232 | if (ret) { |
| 233 | return ret; |
| 234 | } |
| 235 | |
| 236 | ret = (test == EBPF_LOAD_TRAMPOLINE) ? dc_bpf__attach(obj) : ebpf_dc_attach_probes(obj); |
| 237 | if (!ret) { |
| 238 | ebpf_dc_set_hash_tables(obj); |
| 239 | |
| 240 | ebpf_update_controller(dcstat_maps[NETDATA_DCSTAT_CTRL].map_fd, em); |
| 241 | } |
| 242 | |
| 243 | return ret; |
| 244 | } |
| 245 | #endif |
| 246 | |
| 247 | /***************************************************************** |
| 248 | * |
| 249 | * COMMON FUNCTIONS |
| 250 | * |
| 251 | *****************************************************************/ |
| 252 | |
| 253 | /** |
| 254 | * Update publish |
| 255 | * |
| 256 | * Update publish values before to write dimension. |
| 257 | * |
| 258 | * @param out structure that will receive data. |
| 259 | * @param cache_access number of access to directory cache. |
| 260 | * @param not_found number of files not found on the file system |
| 261 | */ |
| 262 | void dcstat_update_publish(netdata_publish_dcstat_t *out, uint64_t cache_access, uint64_t not_found) |
| 263 | { |
| 264 | NETDATA_DOUBLE successful_access = (NETDATA_DOUBLE)(((long long)cache_access) - ((long long)not_found)); |
| 265 | if (successful_access < 0) |
| 266 | successful_access = 0; |
| 267 | NETDATA_DOUBLE ratio = (cache_access) ? successful_access / (NETDATA_DOUBLE)cache_access : 0; |
| 268 | |
| 269 | out->ratio = (long long)(ratio * 100); |
| 270 | } |
| 271 | |
| 272 | /***************************************************************** |
| 273 | * |
| 274 | * FUNCTIONS TO CLOSE THE THREAD |
| 275 | * |
| 276 | *****************************************************************/ |
| 277 | |
| 278 | static void ebpf_obsolete_specific_dc_charts(char *type, int update_every); |
| 279 | |
| 280 | /** |
| 281 | * Obsolete services |
| 282 | * |
| 283 | * Obsolete all service charts created |
| 284 | * |
| 285 | * @param em a pointer to `struct ebpf_module` |
| 286 | */ |
| 287 | static void ebpf_obsolete_dc_services(ebpf_module_t *em, char *id) |
| 288 | { |
| 289 | ebpf_write_chart_obsolete( |
| 290 | id, |
| 291 | NETDATA_DC_HIT_CHART, |
| 292 | "", |
| 293 | "Percentage of files inside directory cache", |
| 294 | EBPF_COMMON_UNITS_PERCENTAGE, |
| 295 | NETDATA_DIRECTORY_CACHE_SUBMENU, |
| 296 | NETDATA_EBPF_CHART_TYPE_LINE, |
| 297 | NETDATA_SYSTEMD_DC_HIT_RATIO_CONTEXT, |
| 298 | 21200, |
| 299 | em->update_every); |
| 300 | |
| 301 | ebpf_write_chart_obsolete( |
| 302 | id, |
| 303 | NETDATA_DC_REFERENCE_CHART, |
| 304 | "", |
| 305 | "Count file access", |
| 306 | EBPF_COMMON_UNITS_FILES, |
| 307 | NETDATA_DIRECTORY_CACHE_SUBMENU, |
| 308 | NETDATA_EBPF_CHART_TYPE_LINE, |
| 309 | NETDATA_SYSTEMD_DC_REFERENCE_CONTEXT, |
| 310 | 21201, |
| 311 | em->update_every); |
| 312 | |
| 313 | ebpf_write_chart_obsolete( |
| 314 | id, |
| 315 | NETDATA_DC_REQUEST_NOT_CACHE_CHART, |
| 316 | "", |
| 317 | "Files not present inside directory cache", |
| 318 | EBPF_COMMON_UNITS_FILES, |
| 319 | NETDATA_DIRECTORY_CACHE_SUBMENU, |
| 320 | NETDATA_EBPF_CHART_TYPE_LINE, |
| 321 | NETDATA_SYSTEMD_DC_NOT_CACHE_CONTEXT, |
| 322 | 21202, |
| 323 | em->update_every); |
| 324 | |
| 325 | ebpf_write_chart_obsolete( |
| 326 | id, |
| 327 | NETDATA_DC_REQUEST_NOT_FOUND_CHART, |
| 328 | "", |
| 329 | "Files not found", |
| 330 | EBPF_COMMON_UNITS_FILES, |
| 331 | NETDATA_DIRECTORY_CACHE_SUBMENU, |
| 332 | NETDATA_EBPF_CHART_TYPE_LINE, |
| 333 | NETDATA_SYSTEMD_DC_NOT_FOUND_CONTEXT, |
| 334 | 21203, |
| 335 | em->update_every); |
| 336 | } |
| 337 | |
| 338 | /** |
| 339 | * Obsolete cgroup chart |
| 340 | * |
| 341 | * Send obsolete for all charts created before to close. |
| 342 | * |
| 343 | * @param em a pointer to `struct ebpf_module` |
| 344 | */ |
| 345 | static inline void ebpf_obsolete_dc_cgroup_charts(ebpf_module_t *em) |
| 346 | { |
| 347 | netdata_mutex_lock(&mutex_cgroup_shm); |
| 348 | |
| 349 | ebpf_cgroup_target_t *ect; |
| 350 | for (ect = ebpf_cgroup_pids; ect; ect = ect->next) { |
| 351 | if (ect->systemd) { |
| 352 | ebpf_obsolete_dc_services(em, ect->name); |
| 353 | |
| 354 | continue; |
| 355 | } |
| 356 | |
| 357 | ebpf_obsolete_specific_dc_charts(ect->name, em->update_every); |
| 358 | } |
| 359 | netdata_mutex_unlock(&mutex_cgroup_shm); |
| 360 | } |
| 361 | |
| 362 | /** |
| 363 | * Obsolette apps charts |
| 364 | * |
| 365 | * Obsolete apps charts. |
| 366 | * |
| 367 | * @param em a pointer to the structure with the default values. |
| 368 | */ |
| 369 | void ebpf_obsolete_dc_apps_charts(struct ebpf_module *em) |
| 370 | { |
| 371 | struct ebpf_target *w; |
| 372 | int update_every = em->update_every; |
| 373 | netdata_mutex_lock(&collect_data_mutex); |
| 374 | for (w = apps_groups_root_target; w; w = w->next) { |
| 375 | if (unlikely(!(w->charts_created & (1 << EBPF_MODULE_DCSTAT_IDX)))) |
| 376 | continue; |
| 377 | |
| 378 | ebpf_write_chart_obsolete( |
| 379 | NETDATA_APP_FAMILY, |
| 380 | w->clean_name, |
| 381 | "_ebpf_dc_hit", |
| 382 | "Percentage of files inside directory cache.", |
| 383 | EBPF_COMMON_UNITS_PERCENTAGE, |
| 384 | NETDATA_DIRECTORY_CACHE_SUBMENU, |
| 385 | NETDATA_EBPF_CHART_TYPE_LINE, |
| 386 | "app.ebpf_dc_hit", |
| 387 | 20265, |
| 388 | update_every); |
| 389 | |
| 390 | ebpf_write_chart_obsolete( |
| 391 | NETDATA_APP_FAMILY, |
| 392 | w->clean_name, |
| 393 | "_ebpf_dc_reference", |
| 394 | "Count file access.", |
| 395 | EBPF_COMMON_UNITS_FILES, |
| 396 | NETDATA_DIRECTORY_CACHE_SUBMENU, |
| 397 | NETDATA_EBPF_CHART_TYPE_STACKED, |
| 398 | "app.ebpf_dc_reference", |
| 399 | 20266, |
| 400 | update_every); |
| 401 | |
| 402 | ebpf_write_chart_obsolete( |
| 403 | NETDATA_APP_FAMILY, |
| 404 | w->clean_name, |
| 405 | "_ebpf_not_cache", |
| 406 | "Files not present inside directory cache.", |
| 407 | EBPF_COMMON_UNITS_FILES, |
| 408 | NETDATA_DIRECTORY_CACHE_SUBMENU, |
| 409 | NETDATA_EBPF_CHART_TYPE_STACKED, |
| 410 | "app.ebpf_dc_not_cache", |
| 411 | 20267, |
| 412 | update_every); |
| 413 | |
| 414 | ebpf_write_chart_obsolete( |
| 415 | NETDATA_APP_FAMILY, |
| 416 | w->clean_name, |
| 417 | "_ebpf_not_found", |
| 418 | "Files not found.", |
| 419 | EBPF_COMMON_UNITS_FILES, |
| 420 | NETDATA_DIRECTORY_CACHE_SUBMENU, |
| 421 | NETDATA_EBPF_CHART_TYPE_STACKED, |
| 422 | "app.ebpf_dc_not_found", |
| 423 | 20268, |
| 424 | update_every); |
| 425 | |
| 426 | w->charts_created &= ~(1 << EBPF_MODULE_DCSTAT_IDX); |
| 427 | } |
| 428 | netdata_mutex_unlock(&collect_data_mutex); |
| 429 | } |
| 430 | |
| 431 | /** |
| 432 | * Obsolete global |
| 433 | * |
| 434 | * Obsolete global charts created by thread. |
| 435 | * |
| 436 | * @param em a pointer to `struct ebpf_module` |
| 437 | */ |
| 438 | static void ebpf_obsolete_dc_global(ebpf_module_t *em) |
| 439 | { |
| 440 | ebpf_write_chart_obsolete( |
| 441 | NETDATA_FILESYSTEM_FAMILY, |
| 442 | NETDATA_DC_HIT_CHART, |
| 443 | "", |
| 444 | "Percentage of files inside directory cache", |
| 445 | EBPF_COMMON_UNITS_PERCENTAGE, |
| 446 | NETDATA_DIRECTORY_CACHE_SUBMENU, |
| 447 | NETDATA_EBPF_CHART_TYPE_LINE, |
| 448 | NETDATA_FS_DC_HIT_RATIO_CONTEXT, |
| 449 | 21200, |
| 450 | em->update_every); |
| 451 | |
| 452 | ebpf_write_chart_obsolete( |
| 453 | NETDATA_FILESYSTEM_FAMILY, |
| 454 | NETDATA_DC_REFERENCE_CHART, |
| 455 | "", |
| 456 | "Variables used to calculate hit ratio.", |
| 457 | EBPF_COMMON_UNITS_FILES, |
| 458 | NETDATA_DIRECTORY_CACHE_SUBMENU, |
| 459 | NETDATA_EBPF_CHART_TYPE_LINE, |
| 460 | NETDATA_FS_DC_REFERENCE_CONTEXT, |
| 461 | 21201, |
| 462 | em->update_every); |
| 463 | } |
| 464 | |
| 465 | /** |
| 466 | * DCstat exit |
| 467 | * |
| 468 | * Cancel child and exit. |
| 469 | * |
| 470 | * @param ptr thread data. |
| 471 | */ |
| 472 | void ebpf_dcstat_unload_bpf(ebpf_module_t *em) |
| 473 | { |
| 474 | #ifdef LIBBPF_MAJOR_VERSION |
| 475 | if (dc_bpf_obj) { |
| 476 | dc_bpf__destroy(dc_bpf_obj); |
| 477 | dc_bpf_obj = NULL; |
| 478 | } |
| 479 | #endif |
| 480 | if ((em->load & EBPF_LOAD_LEGACY) && em->probe_links) { |
| 481 | ebpf_unload_legacy_code(em->objects, em->probe_links); |
| 482 | em->objects = NULL; |
| 483 | em->probe_links = NULL; |
| 484 | } |
| 485 | } |
| 486 | |
| 487 | static void ebpf_dcstat_exit(void *pptr) |
| 488 | { |
| 489 | ebpf_set_pid_map_fd(NETDATA_EBPF_PIDS_DCSTAT_IDX, -1); |
| 490 | ebpf_module_t *em = CLEANUP_FUNCTION_GET_PTR(pptr); |
| 491 | if (!em) |
| 492 | return; |
| 493 | |
| 494 | netdata_mutex_lock(&lock); |
| 495 | collect_pids &= ~(1 << EBPF_MODULE_DCSTAT_IDX); |
| 496 | netdata_mutex_unlock(&lock); |
| 497 | |
| 498 | if (ebpf_read_dcstat.thread) |
| 499 | nd_thread_signal_cancel(ebpf_read_dcstat.thread); |
| 500 | |
| 501 | // Drop this module's bits from the shared PID pool so its slots don't |
| 502 | // stay pinned if the plugin keeps running after the module stops. |
| 503 | if (integration_shm && ebpf_shm_sem_wait_or_stop(shm_mutex_ebpf_integration)) { |
| 504 | netdata_ebpf_sweep_shm_for_module_unsafe(NETDATA_EBPF_PIDS_DCSTAT_IDX); |
| 505 | sem_post(shm_mutex_ebpf_integration); |
| 506 | } |
| 507 | |
| 508 | if (ebpf_module_enabled_get(em) == NETDATA_THREAD_EBPF_FUNCTION_RUNNING && !ebpf_plugin_stop()) { |
| 509 | netdata_mutex_lock(&lock); |
| 510 | if (em->cgroup_charts) { |
| 511 | ebpf_obsolete_dc_cgroup_charts(em); |
| 512 | fflush(stdout); |
| 513 | } |
| 514 | |
| 515 | if (em->apps_charts & NETDATA_EBPF_APPS_FLAG_CHART_CREATED) { |
| 516 | ebpf_obsolete_dc_apps_charts(em); |
| 517 | } |
| 518 | |
| 519 | ebpf_obsolete_dc_global(em); |
| 520 | |
| 521 | fflush(stdout); |
| 522 | netdata_mutex_unlock(&lock); |
| 523 | } |
| 524 | |
| 525 | if (!ebpf_plugin_stop() && em->functions.bpf_unload) |
| 526 | em->functions.bpf_unload(em); |
| 527 | |
| 528 | netdata_mutex_lock(&ebpf_exit_cleanup); |
| 529 | ebpf_module_enabled_set(em, NETDATA_THREAD_EBPF_STOPPED); |
| 530 | netdata_mutex_unlock(&ebpf_exit_cleanup); |
| 531 | } |
| 532 | |
| 533 | /***************************************************************** |
| 534 | * |
| 535 | * APPS |
| 536 | * |
| 537 | *****************************************************************/ |
| 538 | |
| 539 | /** |
| 540 | * Apps Accumulator |
| 541 | * |
| 542 | * Sum all values read from kernel and store in the first address. |
| 543 | * |
| 544 | * @param out the vector with read values. |
| 545 | * @param maps_per_core do I need to read all cores? |
| 546 | */ |
| 547 | static void ebpf_dcstat_apps_accumulator(netdata_dcstat_pid_t *out, int maps_per_core) |
| 548 | { |
| 549 | int i, end = (maps_per_core) ? ebpf_nprocs : 1; |
| 550 | netdata_dcstat_pid_t *total = &out[0]; |
| 551 | uint64_t ct = total->ct; |
| 552 | for (i = 1; i < end; i++) { |
| 553 | if (ebpf_plugin_stop()) |
| 554 | break; |
| 555 | |
| 556 | netdata_dcstat_pid_t *w = &out[i]; |
| 557 | total->cache_access += w->cache_access; |
| 558 | total->file_system += w->file_system; |
| 559 | total->not_found += w->not_found; |
| 560 | |
| 561 | if (w->ct > ct) |
| 562 | ct = w->ct; |
| 563 | |
| 564 | if (!total->name[0] && w->name[0]) |
| 565 | strncpyz(total->name, w->name, sizeof(total->name)); |
| 566 | } |
| 567 | total->ct = ct; |
| 568 | } |
| 569 | |
| 570 | /** |
| 571 | * Read Directory Cache APPS table |
| 572 | * |
| 573 | * Read the apps table and store data inside the structure. |
| 574 | * |
| 575 | * @param maps_per_core do I need to read all cores? |
| 576 | */ |
| 577 | static void ebpf_read_dc_apps_table(int maps_per_core) |
| 578 | { |
| 579 | netdata_dcstat_pid_t *cv = dcstat_vector; |
| 580 | int fd = dcstat_maps[NETDATA_DCSTAT_PID_STATS].map_fd; |
| 581 | size_t length = sizeof(netdata_dcstat_pid_t); |
| 582 | if (maps_per_core) |
| 583 | length *= ebpf_nprocs; |
| 584 | |
| 585 | uint32_t key = 0, next_key = 0; |
| 586 | while (bpf_map_get_next_key(fd, &key, &next_key) == 0) { |
| 587 | if (ebpf_plugin_stop()) |
| 588 | break; |
| 589 | |
| 590 | if (bpf_map_lookup_elem(fd, &key, cv)) { |
| 591 | goto end_dc_loop; |
| 592 | } |
| 593 | |
| 594 | ebpf_dcstat_apps_accumulator(cv, maps_per_core); |
| 595 | |
| 596 | netdata_ebpf_pid_stats_t *local_pid = netdata_ebpf_get_shm_pointer_unsafe(key, NETDATA_EBPF_PIDS_DCSTAT_IDX); |
| 597 | if (!local_pid) |
| 598 | goto end_dc_loop; |
| 599 | netdata_publish_dcstat_t *publish = &local_pid->directory_cache; |
| 600 | if (!publish->ct || publish->ct != cv->ct) { |
| 601 | publish->ct = cv->ct; |
| 602 | publish->curr.not_found = cv[0].not_found; |
| 603 | publish->curr.file_system = cv[0].file_system; |
| 604 | publish->curr.cache_access = cv[0].cache_access; |
| 605 | } else { |
| 606 | if (kill((pid_t)key, 0) == -1 && errno == ESRCH) { |
| 607 | if (netdata_ebpf_reset_shm_pointer_unsafe(fd, key, NETDATA_EBPF_PIDS_DCSTAT_IDX)) |
| 608 | memset(publish, 0, sizeof(*publish)); |
| 609 | } |
| 610 | } |
| 611 | |
| 612 | end_dc_loop: |
| 613 | // We are cleaning to avoid passing data read from one process to other. |
| 614 | memset(cv, 0, length); |
| 615 | key = next_key; |
| 616 | } |
| 617 | } |
| 618 | |
| 619 | /** |
| 620 | * Cachestat sum PIDs |
| 621 | * |
| 622 | * Sum values for all PIDs associated to a group |
| 623 | * |
| 624 | * @param publish output structure. |
| 625 | * @param root structure with listed IPs |
| 626 | */ |
| 627 | void ebpf_dcstat_sum_pids(netdata_publish_dcstat_t *publish, struct ebpf_pid_on_target *root) |
| 628 | { |
| 629 | memset(&publish->curr, 0, sizeof(netdata_publish_dcstat_pid_t)); |
| 630 | for (; root; root = root->next) { |
| 631 | if (ebpf_plugin_stop()) |
| 632 | break; |
| 633 | |
| 634 | uint32_t pid = root->pid; |
| 635 | netdata_ebpf_pid_stats_t *local_pid = netdata_ebpf_lookup_shm_pointer_unsafe(pid); |
| 636 | if (!local_pid || !(local_pid->threads & (1U << (NETDATA_EBPF_PIDS_DCSTAT_IDX << 1)))) |
| 637 | continue; |
| 638 | netdata_publish_dcstat_t *w = &local_pid->directory_cache; |
| 639 | |
| 640 | publish->curr.cache_access += w->curr.cache_access; |
| 641 | publish->curr.file_system += w->curr.file_system; |
| 642 | publish->curr.not_found += w->curr.not_found; |
| 643 | } |
| 644 | } |
| 645 | |
| 646 | /** |
| 647 | * Resume apps data |
| 648 | */ |
| 649 | void ebpf_dc_resume_apps_data(void) |
| 650 | { |
| 651 | struct ebpf_target *w; |
| 652 | |
| 653 | netdata_mutex_lock(&collect_data_mutex); |
| 654 | for (w = apps_groups_root_target; w; w = w->next) { |
| 655 | if (ebpf_plugin_stop()) |
| 656 | break; |
| 657 | |
| 658 | if (unlikely(!(w->charts_created & (1 << EBPF_MODULE_DCSTAT_IDX)))) |
| 659 | continue; |
| 660 | |
| 661 | ebpf_dcstat_sum_pids(&w->dcstat, w->root_pid); |
| 662 | |
| 663 | uint64_t cache = w->dcstat.curr.cache_access; |
| 664 | uint64_t not_found = w->dcstat.curr.not_found; |
| 665 | |
| 666 | dcstat_update_publish(&w->dcstat, cache, not_found); |
| 667 | } |
| 668 | netdata_mutex_unlock(&collect_data_mutex); |
| 669 | } |
| 670 | |
| 671 | /** |
| 672 | * Update cgroup |
| 673 | * |
| 674 | * Update cgroup data based in collected PID. |
| 675 | * |
| 676 | * @param maps_per_core do I need to read all cores? |
| 677 | */ |
| 678 | static void ebpf_update_dc_cgroup() |
| 679 | { |
| 680 | ebpf_cgroup_target_t *ect; |
| 681 | netdata_mutex_lock(&mutex_cgroup_shm); |
| 682 | for (ect = ebpf_cgroup_pids; ect; ect = ect->next) { |
| 683 | if (ebpf_plugin_stop()) |
| 684 | break; |
| 685 | |
| 686 | struct pid_on_target2 *pids; |
| 687 | for (pids = ect->pids; pids; pids = pids->next) { |
| 688 | uint32_t pid = pids->pid; |
| 689 | netdata_dcstat_pid_t *out = &pids->dc; |
| 690 | netdata_ebpf_pid_stats_t *local_pid = netdata_ebpf_lookup_shm_pointer_unsafe(pid); |
| 691 | if (!local_pid || !(local_pid->threads & (1U << (NETDATA_EBPF_PIDS_DCSTAT_IDX << 1)))) |
| 692 | continue; |
| 693 | netdata_publish_dcstat_t *in = &local_pid->directory_cache; |
| 694 | |
| 695 | memcpy(out, &in->curr, sizeof(netdata_publish_dcstat_pid_t)); |
| 696 | } |
| 697 | } |
| 698 | netdata_mutex_unlock(&mutex_cgroup_shm); |
| 699 | } |
| 700 | |
| 701 | /** |
| 702 | * DCstat thread |
| 703 | * |
| 704 | * Thread used to generate dcstat charts. |
| 705 | * |
| 706 | * @param ptr a pointer to `struct ebpf_module` |
| 707 | * |
| 708 | * @return It always return NULL |
| 709 | */ |
| 710 | void ebpf_read_dcstat_thread(void *ptr) |
| 711 | { |
| 712 | ebpf_module_t *em = (ebpf_module_t *)ptr; |
| 713 | |
| 714 | int maps_per_core = em->maps_per_core; |
| 715 | int update_every = em->update_every; |
| 716 | int collect_pid = (em->apps_charts || em->cgroup_charts); |
| 717 | int cgroups = em->cgroup_charts; |
| 718 | if (!collect_pid) |
| 719 | return; |
| 720 | |
| 721 | int counter = update_every - 1; |
| 722 | |
| 723 | uint32_t lifetime = em->lifetime; |
| 724 | uint32_t running_time = 0; |
| 725 | ebpf_set_pid_map_fd(NETDATA_EBPF_PIDS_DCSTAT_IDX, dcstat_maps[NETDATA_DCSTAT_PID_STATS].map_fd); |
| 726 | heartbeat_t hb; |
| 727 | heartbeat_init(&hb, USEC_PER_SEC); |
| 728 | while (!ebpf_plugin_stop() && running_time < lifetime) { |
| 729 | if (ebpf_plugin_stop()) |
| 730 | break; |
| 731 | |
| 732 | (void)heartbeat_next(&hb); |
| 733 | if (ebpf_plugin_stop()) |
| 734 | break; |
| 735 | |
| 736 | if (++counter != update_every) |
| 737 | continue; |
| 738 | |
| 739 | if (!ebpf_shm_sem_wait_or_stop(shm_mutex_ebpf_integration)) { |
| 740 | if (errno != ECANCELED) |
| 741 | netdata_log_error("DCSTAT: Failed to wait on semaphore."); |
| 742 | break; |
| 743 | } |
| 744 | |
| 745 | ebpf_read_dc_apps_table(maps_per_core); |
| 746 | ebpf_dc_resume_apps_data(); |
| 747 | if (ebpf_plugin_stop()) { |
| 748 | if (sem_post(shm_mutex_ebpf_integration)) |
| 749 | netdata_log_error("DCSTAT: Failed to post semaphore."); |
| 750 | break; |
| 751 | } |
| 752 | |
| 753 | if (cgroups && ebpf_cgroup_integration_active_get()) |
| 754 | ebpf_update_dc_cgroup(); |
| 755 | |
| 756 | if (sem_post(shm_mutex_ebpf_integration)) { |
| 757 | netdata_log_error("DCSTAT: Failed to post semaphore."); |
| 758 | break; |
| 759 | } |
| 760 | |
| 761 | counter = 0; |
| 762 | |
| 763 | if (ebpf_plugin_stop()) { |
| 764 | break; |
| 765 | } |
| 766 | |
| 767 | netdata_mutex_lock(&ebpf_exit_cleanup); |
| 768 | if (running_time) |
| 769 | running_time += update_every; |
| 770 | else |
| 771 | running_time = update_every; |
| 772 | |
| 773 | em->running_time = running_time; |
| 774 | netdata_mutex_unlock(&ebpf_exit_cleanup); |
| 775 | } |
| 776 | } |
| 777 | |
| 778 | /** |
| 779 | * Create apps charts |
| 780 | * |
| 781 | * Call ebpf_create_chart to create the charts on apps submenu. |
| 782 | * |
| 783 | * @param em a pointer to the structure with the default values. |
| 784 | */ |
| 785 | void ebpf_dcstat_create_apps_charts(struct ebpf_module *em, void *ptr) |
| 786 | { |
| 787 | struct ebpf_target *root = ptr; |
| 788 | struct ebpf_target *w; |
| 789 | int update_every = em->update_every; |
| 790 | for (w = root; w; w = w->next) { |
| 791 | if (ebpf_plugin_stop()) |
| 792 | break; |
| 793 | |
| 794 | if (unlikely(!w->exposed)) |
| 795 | continue; |
| 796 | |
| 797 | ebpf_write_chart_cmd( |
| 798 | NETDATA_APP_FAMILY, |
| 799 | w->clean_name, |
| 800 | "_ebpf_dc_hit", |
| 801 | "Percentage of files inside directory cache.", |
| 802 | EBPF_COMMON_UNITS_PERCENTAGE, |
| 803 | NETDATA_DIRECTORY_CACHE_SUBMENU, |
| 804 | NETDATA_EBPF_CHART_TYPE_LINE, |
| 805 | "app.ebpf_dc_hit", |
| 806 | 20265, |
| 807 | update_every, |
| 808 | NETDATA_EBPF_MODULE_NAME_DCSTAT); |
| 809 | ebpf_create_chart_labels("app_group", w->name, RRDLABEL_SRC_AUTO); |
| 810 | ebpf_commit_label(); |
| 811 | fprintf(stdout, "DIMENSION ratio '' %s 1 1\n", ebpf_algorithms[NETDATA_EBPF_ABSOLUTE_IDX]); |
| 812 | |
| 813 | ebpf_write_chart_cmd( |
| 814 | NETDATA_APP_FAMILY, |
| 815 | w->clean_name, |
| 816 | "_ebpf_dc_reference", |
| 817 | "Count file access.", |
| 818 | EBPF_COMMON_UNITS_FILES, |
| 819 | NETDATA_DIRECTORY_CACHE_SUBMENU, |
| 820 | NETDATA_EBPF_CHART_TYPE_STACKED, |
| 821 | "app.ebpf_dc_reference", |
| 822 | 20266, |
| 823 | update_every, |
| 824 | NETDATA_EBPF_MODULE_NAME_DCSTAT); |
| 825 | ebpf_create_chart_labels("app_group", w->name, RRDLABEL_SRC_AUTO); |
| 826 | ebpf_commit_label(); |
| 827 | fprintf(stdout, "DIMENSION files '' %s 1 1\n", ebpf_algorithms[NETDATA_EBPF_ABSOLUTE_IDX]); |
| 828 | |
| 829 | ebpf_write_chart_cmd( |
| 830 | NETDATA_APP_FAMILY, |
| 831 | w->clean_name, |
| 832 | "_ebpf_not_cache", |
| 833 | "Files not present inside directory cache.", |
| 834 | EBPF_COMMON_UNITS_FILES, |
| 835 | NETDATA_DIRECTORY_CACHE_SUBMENU, |
| 836 | NETDATA_EBPF_CHART_TYPE_STACKED, |
| 837 | "app.ebpf_dc_not_cache", |
| 838 | 20267, |
| 839 | update_every, |
| 840 | NETDATA_EBPF_MODULE_NAME_DCSTAT); |
| 841 | ebpf_create_chart_labels("app_group", w->name, RRDLABEL_SRC_AUTO); |
| 842 | ebpf_commit_label(); |
| 843 | fprintf(stdout, "DIMENSION files '' %s 1 1\n", ebpf_algorithms[NETDATA_EBPF_ABSOLUTE_IDX]); |
| 844 | |
| 845 | ebpf_write_chart_cmd( |
| 846 | NETDATA_APP_FAMILY, |
| 847 | w->clean_name, |
| 848 | "_ebpf_not_found", |
| 849 | "Files not found.", |
| 850 | EBPF_COMMON_UNITS_FILES, |
| 851 | NETDATA_DIRECTORY_CACHE_SUBMENU, |
| 852 | NETDATA_EBPF_CHART_TYPE_STACKED, |
| 853 | "app.ebpf_dc_not_found", |
| 854 | 20268, |
| 855 | update_every, |
| 856 | NETDATA_EBPF_MODULE_NAME_DCSTAT); |
| 857 | ebpf_create_chart_labels("app_group", w->name, RRDLABEL_SRC_AUTO); |
| 858 | ebpf_commit_label(); |
| 859 | fprintf(stdout, "DIMENSION files '' %s 1 1\n", ebpf_algorithms[NETDATA_EBPF_ABSOLUTE_IDX]); |
| 860 | |
| 861 | w->charts_created |= 1 << EBPF_MODULE_DCSTAT_IDX; |
| 862 | } |
| 863 | |
| 864 | em->apps_charts |= NETDATA_EBPF_APPS_FLAG_CHART_CREATED; |
| 865 | } |
| 866 | |
| 867 | /***************************************************************** |
| 868 | * |
| 869 | * MAIN LOOP |
| 870 | * |
| 871 | *****************************************************************/ |
| 872 | |
| 873 | /** |
| 874 | * Read global table |
| 875 | * |
| 876 | * Read the table with number of calls for all functions |
| 877 | * |
| 878 | * @param maps_per_core do I need to read all cores? |
| 879 | */ |
| 880 | static void ebpf_dc_read_global_tables(int maps_per_core) |
| 881 | { |
| 882 | ebpf_read_global_table_stats( |
| 883 | dcstat_hash_values, |
| 884 | dcstat_values, |
| 885 | dcstat_maps[NETDATA_DCSTAT_GLOBAL_STATS].map_fd, |
| 886 | maps_per_core, |
| 887 | NETDATA_KEY_DC_REFERENCE, |
| 888 | NETDATA_DIRECTORY_CACHE_END); |
| 889 | } |
| 890 | |
| 891 | /** |
| 892 | * Send data to Netdata calling auxiliary functions. |
| 893 | * |
| 894 | * @param root the target list. |
| 895 | */ |
| 896 | void ebpf_dcache_send_apps_data(struct ebpf_target *root) |
| 897 | { |
| 898 | struct ebpf_target *w; |
| 899 | collected_number value; |
| 900 | |
| 901 | netdata_mutex_lock(&collect_data_mutex); |
| 902 | for (w = root; w; w = w->next) { |
| 903 | if (ebpf_plugin_stop()) |
| 904 | break; |
| 905 | |
| 906 | if (unlikely(!(w->charts_created & (1 << EBPF_MODULE_DCSTAT_IDX)))) |
| 907 | continue; |
| 908 | |
| 909 | value = (collected_number)w->dcstat.ratio; |
| 910 | ebpf_write_begin_chart(NETDATA_APP_FAMILY, w->clean_name, "_ebpf_dc_hit"); |
| 911 | write_chart_dimension("ratio", value); |
| 912 | ebpf_write_end_chart(); |
| 913 | |
| 914 | if (w->dcstat.curr.cache_access < w->dcstat.prev.cache_access) { |
| 915 | w->dcstat.prev.cache_access = 0; |
| 916 | } |
| 917 | w->dcstat.cache_access = (long long)w->dcstat.curr.cache_access - (long long)w->dcstat.prev.cache_access; |
| 918 | |
| 919 | ebpf_write_begin_chart(NETDATA_APP_FAMILY, w->clean_name, "_ebpf_dc_reference"); |
| 920 | value = (collected_number)w->dcstat.cache_access; |
| 921 | write_chart_dimension("files", value); |
| 922 | ebpf_write_end_chart(); |
| 923 | w->dcstat.prev.cache_access = w->dcstat.curr.cache_access; |
| 924 | |
| 925 | if (w->dcstat.curr.file_system < w->dcstat.prev.file_system) { |
| 926 | w->dcstat.prev.file_system = 0; |
| 927 | } |
| 928 | value = (collected_number)(!w->dcstat.cache_access) ? |
| 929 | 0 : |
| 930 | (long long)w->dcstat.curr.file_system - (long long)w->dcstat.prev.file_system; |
| 931 | ebpf_write_begin_chart(NETDATA_APP_FAMILY, w->clean_name, "_ebpf_not_cache"); |
| 932 | write_chart_dimension("files", value); |
| 933 | ebpf_write_end_chart(); |
| 934 | w->dcstat.prev.file_system = w->dcstat.curr.file_system; |
| 935 | |
| 936 | if (w->dcstat.curr.not_found < w->dcstat.prev.not_found) { |
| 937 | w->dcstat.prev.not_found = 0; |
| 938 | } |
| 939 | value = (collected_number)(!w->dcstat.cache_access) ? |
| 940 | 0 : |
| 941 | (long long)w->dcstat.curr.not_found - (long long)w->dcstat.prev.not_found; |
| 942 | ebpf_write_begin_chart(NETDATA_APP_FAMILY, w->clean_name, "_ebpf_not_found"); |
| 943 | write_chart_dimension("files", value); |
| 944 | ebpf_write_end_chart(); |
| 945 | w->dcstat.prev.not_found = w->dcstat.curr.not_found; |
| 946 | } |
| 947 | netdata_mutex_unlock(&collect_data_mutex); |
| 948 | } |
| 949 | |
| 950 | /** |
| 951 | * Send global |
| 952 | * |
| 953 | * Send global charts to Netdata |
| 954 | */ |
| 955 | static void dcstat_send_global(netdata_publish_dcstat_t *publish) |
| 956 | { |
| 957 | dcstat_update_publish( |
| 958 | publish, dcstat_hash_values[NETDATA_KEY_DC_REFERENCE], dcstat_hash_values[NETDATA_KEY_DC_MISS]); |
| 959 | |
| 960 | netdata_publish_syscall_t *ptr = dcstat_counter_publish_aggregated; |
| 961 | |
| 962 | netdata_idx_t ref_value = dcstat_hash_values[NETDATA_KEY_DC_REFERENCE]; |
| 963 | ptr[NETDATA_DCSTAT_IDX_REFERENCE].ncall = ref_value - ptr[NETDATA_DCSTAT_IDX_REFERENCE].pcall; |
| 964 | ptr[NETDATA_DCSTAT_IDX_REFERENCE].pcall = ref_value; |
| 965 | |
| 966 | netdata_idx_t slow_value = dcstat_hash_values[NETDATA_KEY_DC_SLOW]; |
| 967 | ptr[NETDATA_DCSTAT_IDX_SLOW].ncall = slow_value - ptr[NETDATA_DCSTAT_IDX_SLOW].pcall; |
| 968 | ptr[NETDATA_DCSTAT_IDX_SLOW].pcall = slow_value; |
| 969 | |
| 970 | netdata_idx_t miss_value = dcstat_hash_values[NETDATA_KEY_DC_MISS]; |
| 971 | ptr[NETDATA_DCSTAT_IDX_MISS].ncall = miss_value - ptr[NETDATA_DCSTAT_IDX_MISS].pcall; |
| 972 | ptr[NETDATA_DCSTAT_IDX_MISS].pcall = miss_value; |
| 973 | |
| 974 | ebpf_one_dimension_write_charts( |
| 975 | NETDATA_FILESYSTEM_FAMILY, NETDATA_DC_HIT_CHART, ptr[NETDATA_DCSTAT_IDX_RATIO].dimension, publish->ratio); |
| 976 | |
| 977 | write_count_chart( |
| 978 | NETDATA_DC_REFERENCE_CHART, |
| 979 | NETDATA_FILESYSTEM_FAMILY, |
| 980 | &dcstat_counter_publish_aggregated[NETDATA_DCSTAT_IDX_REFERENCE], |
| 981 | 3); |
| 982 | } |
| 983 | |
| 984 | /** |
| 985 | * Create specific directory cache charts |
| 986 | * |
| 987 | * Create charts for cgroup/application. |
| 988 | * |
| 989 | * @param type the chart type. |
| 990 | * @param update_every value to overwrite the update frequency set by the server. |
| 991 | */ |
| 992 | static void ebpf_create_specific_dc_charts(char *type, int update_every) |
| 993 | { |
| 994 | char *label = (!strncmp(type, "cgroup_", 7)) ? &type[7] : type; |
| 995 | ebpf_create_chart( |
| 996 | type, |
| 997 | NETDATA_DC_HIT_CHART, |
| 998 | "Percentage of files inside directory cache", |
| 999 | EBPF_COMMON_UNITS_PERCENTAGE, |
| 1000 | NETDATA_DIRECTORY_CACHE_SUBMENU, |
| 1001 | NETDATA_CGROUP_DC_HIT_RATIO_CONTEXT, |
| 1002 | NETDATA_EBPF_CHART_TYPE_LINE, |
| 1003 | NETDATA_CHART_PRIO_CGROUPS_CONTAINERS + 5700, |
| 1004 | ebpf_create_global_dimension, |
| 1005 | dcstat_counter_publish_aggregated, |
| 1006 | 1, |
| 1007 | update_every, |
| 1008 | NETDATA_EBPF_MODULE_NAME_DCSTAT); |
| 1009 | ebpf_create_chart_labels("cgroup_name", label, RRDLABEL_SRC_AUTO); |
| 1010 | ebpf_commit_label(); |
| 1011 | |
| 1012 | ebpf_create_chart( |
| 1013 | type, |
| 1014 | NETDATA_DC_REFERENCE_CHART, |
| 1015 | "Count file access", |
| 1016 | EBPF_COMMON_UNITS_FILES, |
| 1017 | NETDATA_DIRECTORY_CACHE_SUBMENU, |
| 1018 | NETDATA_CGROUP_DC_REFERENCE_CONTEXT, |
| 1019 | NETDATA_EBPF_CHART_TYPE_LINE, |
| 1020 | NETDATA_CHART_PRIO_CGROUPS_CONTAINERS + 5701, |
| 1021 | ebpf_create_global_dimension, |
| 1022 | &dcstat_counter_publish_aggregated[NETDATA_DCSTAT_IDX_REFERENCE], |
| 1023 | 1, |
| 1024 | update_every, |
| 1025 | NETDATA_EBPF_MODULE_NAME_DCSTAT); |
| 1026 | ebpf_create_chart_labels("cgroup_name", label, RRDLABEL_SRC_AUTO); |
| 1027 | ebpf_commit_label(); |
| 1028 | |
| 1029 | ebpf_create_chart( |
| 1030 | type, |
| 1031 | NETDATA_DC_REQUEST_NOT_CACHE_CHART, |
| 1032 | "Files not present inside directory cache", |
| 1033 | EBPF_COMMON_UNITS_FILES, |
| 1034 | NETDATA_DIRECTORY_CACHE_SUBMENU, |
| 1035 | NETDATA_CGROUP_DC_NOT_CACHE_CONTEXT, |
| 1036 | NETDATA_EBPF_CHART_TYPE_LINE, |
| 1037 | NETDATA_CHART_PRIO_CGROUPS_CONTAINERS + 5702, |
| 1038 | ebpf_create_global_dimension, |
| 1039 | &dcstat_counter_publish_aggregated[NETDATA_DCSTAT_IDX_SLOW], |
| 1040 | 1, |
| 1041 | update_every, |
| 1042 | NETDATA_EBPF_MODULE_NAME_DCSTAT); |
| 1043 | ebpf_create_chart_labels("cgroup_name", label, RRDLABEL_SRC_AUTO); |
| 1044 | ebpf_commit_label(); |
| 1045 | |
| 1046 | ebpf_create_chart( |
| 1047 | type, |
| 1048 | NETDATA_DC_REQUEST_NOT_FOUND_CHART, |
| 1049 | "Files not found", |
| 1050 | EBPF_COMMON_UNITS_FILES, |
| 1051 | NETDATA_DIRECTORY_CACHE_SUBMENU, |
| 1052 | NETDATA_CGROUP_DC_NOT_FOUND_CONTEXT, |
| 1053 | NETDATA_EBPF_CHART_TYPE_LINE, |
| 1054 | NETDATA_CHART_PRIO_CGROUPS_CONTAINERS + 5703, |
| 1055 | ebpf_create_global_dimension, |
| 1056 | &dcstat_counter_publish_aggregated[NETDATA_DCSTAT_IDX_MISS], |
| 1057 | 1, |
| 1058 | update_every, |
| 1059 | NETDATA_EBPF_MODULE_NAME_DCSTAT); |
| 1060 | ebpf_create_chart_labels("cgroup_name", label, RRDLABEL_SRC_AUTO); |
| 1061 | ebpf_commit_label(); |
| 1062 | } |
| 1063 | |
| 1064 | /** |
| 1065 | * Obsolete specific directory cache charts |
| 1066 | * |
| 1067 | * Obsolete charts for cgroup/application. |
| 1068 | * |
| 1069 | * @param type the chart type. |
| 1070 | * @param update_every value to overwrite the update frequency set by the server. |
| 1071 | */ |
| 1072 | static void ebpf_obsolete_specific_dc_charts(char *type, int update_every) |
| 1073 | { |
| 1074 | ebpf_write_chart_obsolete( |
| 1075 | type, |
| 1076 | NETDATA_DC_HIT_CHART, |
| 1077 | "", |
| 1078 | "Percentage of files inside directory cache", |
| 1079 | EBPF_COMMON_UNITS_PERCENTAGE, |
| 1080 | NETDATA_DIRECTORY_CACHE_SUBMENU, |
| 1081 | NETDATA_EBPF_CHART_TYPE_LINE, |
| 1082 | NETDATA_CGROUP_DC_HIT_RATIO_CONTEXT, |
| 1083 | NETDATA_CHART_PRIO_CGROUPS_CONTAINERS + 5700, |
| 1084 | update_every); |
| 1085 | |
| 1086 | ebpf_write_chart_obsolete( |
| 1087 | type, |
| 1088 | NETDATA_DC_REFERENCE_CHART, |
| 1089 | "", |
| 1090 | "Count file access", |
| 1091 | EBPF_COMMON_UNITS_FILES, |
| 1092 | NETDATA_DIRECTORY_CACHE_SUBMENU, |
| 1093 | NETDATA_EBPF_CHART_TYPE_LINE, |
| 1094 | NETDATA_CGROUP_DC_REFERENCE_CONTEXT, |
| 1095 | NETDATA_CHART_PRIO_CGROUPS_CONTAINERS + 5701, |
| 1096 | update_every); |
| 1097 | |
| 1098 | ebpf_write_chart_obsolete( |
| 1099 | type, |
| 1100 | NETDATA_DC_REQUEST_NOT_CACHE_CHART, |
| 1101 | "", |
| 1102 | "Files not present inside directory cache", |
| 1103 | EBPF_COMMON_UNITS_FILES, |
| 1104 | NETDATA_DIRECTORY_CACHE_SUBMENU, |
| 1105 | NETDATA_EBPF_CHART_TYPE_LINE, |
| 1106 | NETDATA_CGROUP_DC_NOT_CACHE_CONTEXT, |
| 1107 | NETDATA_CHART_PRIO_CGROUPS_CONTAINERS + 5702, |
| 1108 | update_every); |
| 1109 | |
| 1110 | ebpf_write_chart_obsolete( |
| 1111 | type, |
| 1112 | NETDATA_DC_REQUEST_NOT_FOUND_CHART, |
| 1113 | "", |
| 1114 | "Files not found", |
| 1115 | EBPF_COMMON_UNITS_FILES, |
| 1116 | NETDATA_DIRECTORY_CACHE_SUBMENU, |
| 1117 | NETDATA_EBPF_CHART_TYPE_LINE, |
| 1118 | NETDATA_CGROUP_DC_NOT_FOUND_CONTEXT, |
| 1119 | NETDATA_CHART_PRIO_CGROUPS_CONTAINERS + 5703, |
| 1120 | update_every); |
| 1121 | } |
| 1122 | |
| 1123 | /** |
| 1124 | * Cachestat sum PIDs |
| 1125 | * |
| 1126 | * Sum values for all PIDs associated to a group |
| 1127 | * |
| 1128 | * @param publish output structure. |
| 1129 | * @param root structure with listed IPs |
| 1130 | */ |
| 1131 | void ebpf_dc_sum_cgroup_pids(netdata_publish_dcstat_t *publish, struct pid_on_target2 *root) |
| 1132 | { |
| 1133 | memset(&publish->curr, 0, sizeof(netdata_publish_dcstat_pid_t)); |
| 1134 | while (root) { |
| 1135 | if (ebpf_plugin_stop()) |
| 1136 | break; |
| 1137 | |
| 1138 | netdata_dcstat_pid_t *src = &root->dc; |
| 1139 | |
| 1140 | publish->curr.cache_access += src->cache_access; |
| 1141 | publish->curr.file_system += src->file_system; |
| 1142 | publish->curr.not_found += src->not_found; |
| 1143 | |
| 1144 | root = root->next; |
| 1145 | } |
| 1146 | } |
| 1147 | |
| 1148 | /** |
| 1149 | * Calc chart values |
| 1150 | * |
| 1151 | * Do necessary math to plot charts. |
| 1152 | */ |
| 1153 | void ebpf_dc_calc_chart_values(void) |
| 1154 | { |
| 1155 | ebpf_cgroup_target_t *ect; |
| 1156 | for (ect = ebpf_cgroup_pids; ect; ect = ect->next) { |
| 1157 | if (ebpf_plugin_stop()) |
| 1158 | break; |
| 1159 | |
| 1160 | ebpf_dc_sum_cgroup_pids(&ect->publish_dc, ect->pids); |
| 1161 | uint64_t cache = ect->publish_dc.curr.cache_access; |
| 1162 | uint64_t not_found = ect->publish_dc.curr.not_found; |
| 1163 | |
| 1164 | dcstat_update_publish(&ect->publish_dc, cache, not_found); |
| 1165 | |
| 1166 | ect->publish_dc.cache_access = |
| 1167 | (long long)ect->publish_dc.curr.cache_access - (long long)ect->publish_dc.prev.cache_access; |
| 1168 | ect->publish_dc.prev.cache_access = ect->publish_dc.curr.cache_access; |
| 1169 | |
| 1170 | if (ect->publish_dc.curr.not_found < ect->publish_dc.prev.not_found) { |
| 1171 | ect->publish_dc.prev.not_found = 0; |
| 1172 | } |
| 1173 | } |
| 1174 | } |
| 1175 | |
| 1176 | /** |
| 1177 | * Create Systemd directory cache Charts |
| 1178 | * |
| 1179 | * Create charts when systemd is enabled |
| 1180 | * |
| 1181 | * @param update_every value to overwrite the update frequency set by the server. |
| 1182 | **/ |
| 1183 | static void ebpf_create_systemd_dc_charts(int update_every) |
| 1184 | { |
| 1185 | static ebpf_systemd_args_t data_dc_hit_ratio = { |
| 1186 | .title = "Percentage of files inside directory cache", |
| 1187 | .units = EBPF_COMMON_UNITS_PERCENTAGE, |
| 1188 | .family = NETDATA_DIRECTORY_CACHE_SUBMENU, |
| 1189 | .charttype = NETDATA_EBPF_CHART_TYPE_LINE, |
| 1190 | .order = 21200, |
| 1191 | .algorithm = EBPF_CHART_ALGORITHM_ABSOLUTE, |
| 1192 | .context = NETDATA_SYSTEMD_DC_HIT_RATIO_CONTEXT, |
| 1193 | .module = NETDATA_EBPF_MODULE_NAME_DCSTAT, |
| 1194 | .update_every = 0, |
| 1195 | .suffix = NETDATA_DC_HIT_CHART, |
| 1196 | .dimension = "percentage"}; |
| 1197 | |
| 1198 | static ebpf_systemd_args_t data_dc_references = { |
| 1199 | .title = "Count file access", |
| 1200 | .units = EBPF_COMMON_UNITS_FILES, |
| 1201 | .family = NETDATA_DIRECTORY_CACHE_SUBMENU, |
| 1202 | .charttype = NETDATA_EBPF_CHART_TYPE_LINE, |
| 1203 | .order = 21201, |
| 1204 | .algorithm = EBPF_CHART_ALGORITHM_ABSOLUTE, |
| 1205 | .context = NETDATA_SYSTEMD_DC_REFERENCE_CONTEXT, |
| 1206 | .module = NETDATA_EBPF_MODULE_NAME_DCSTAT, |
| 1207 | .update_every = 0, |
| 1208 | .suffix = NETDATA_DC_REFERENCE_CHART, |
| 1209 | .dimension = "files"}; |
| 1210 | |
| 1211 | static ebpf_systemd_args_t data_dc_not_cache = { |
| 1212 | .title = "Files not present inside directory cache", |
| 1213 | .units = EBPF_COMMON_UNITS_FILES, |
| 1214 | .family = NETDATA_DIRECTORY_CACHE_SUBMENU, |
| 1215 | .charttype = NETDATA_EBPF_CHART_TYPE_LINE, |
| 1216 | .order = 21202, |
| 1217 | .algorithm = EBPF_CHART_ALGORITHM_ABSOLUTE, |
| 1218 | .context = NETDATA_SYSTEMD_DC_NOT_CACHE_CONTEXT, |
| 1219 | .module = NETDATA_EBPF_MODULE_NAME_DCSTAT, |
| 1220 | .update_every = 0, |
| 1221 | .suffix = NETDATA_DC_REQUEST_NOT_CACHE_CHART, |
| 1222 | .dimension = "files"}; |
| 1223 | |
| 1224 | static ebpf_systemd_args_t data_dc_not_found = { |
| 1225 | .title = "Files not found", |
| 1226 | .units = EBPF_COMMON_UNITS_FILES, |
| 1227 | .family = NETDATA_DIRECTORY_CACHE_SUBMENU, |
| 1228 | .charttype = NETDATA_EBPF_CHART_TYPE_LINE, |
| 1229 | .order = 21203, |
| 1230 | .algorithm = EBPF_CHART_ALGORITHM_ABSOLUTE, |
| 1231 | .context = NETDATA_SYSTEMD_DC_NOT_CACHE_CONTEXT, |
| 1232 | .module = NETDATA_EBPF_MODULE_NAME_DCSTAT, |
| 1233 | .update_every = 0, |
| 1234 | .suffix = NETDATA_DC_REQUEST_NOT_FOUND_CHART, |
| 1235 | .dimension = "files"}; |
| 1236 | |
| 1237 | if (!data_dc_not_cache.update_every) { |
| 1238 | data_dc_hit_ratio.update_every = update_every; |
| 1239 | data_dc_not_cache.update_every = update_every; |
| 1240 | data_dc_not_found.update_every = update_every; |
| 1241 | data_dc_references.update_every = update_every; |
| 1242 | } |
| 1243 | |
| 1244 | ebpf_cgroup_target_t *w; |
| 1245 | for (w = ebpf_cgroup_pids; w; w = w->next) { |
| 1246 | if (ebpf_plugin_stop()) |
| 1247 | break; |
| 1248 | |
| 1249 | if (unlikely(!w->systemd || w->flags & NETDATA_EBPF_SERVICES_HAS_DC_CHART)) |
| 1250 | continue; |
| 1251 | |
| 1252 | data_dc_hit_ratio.id = data_dc_not_cache.id = data_dc_not_found.id = data_dc_references.id = w->name; |
| 1253 | ebpf_create_charts_on_systemd(&data_dc_hit_ratio); |
| 1254 | |
| 1255 | ebpf_create_charts_on_systemd(&data_dc_not_found); |
| 1256 | |
| 1257 | ebpf_create_charts_on_systemd(&data_dc_not_cache); |
| 1258 | |
| 1259 | ebpf_create_charts_on_systemd(&data_dc_references); |
| 1260 | |
| 1261 | w->flags |= NETDATA_EBPF_SERVICES_HAS_DC_CHART; |
| 1262 | } |
| 1263 | } |
| 1264 | |
| 1265 | /** |
| 1266 | * Send Directory Cache charts |
| 1267 | * |
| 1268 | * Send collected data to Netdata. |
| 1269 | */ |
| 1270 | static void ebpf_send_systemd_dc_charts() |
| 1271 | { |
| 1272 | ebpf_cgroup_target_t *ect; |
| 1273 | collected_number value; |
| 1274 | for (ect = ebpf_cgroup_pids; ect; ect = ect->next) { |
| 1275 | if (ebpf_plugin_stop()) |
| 1276 | break; |
| 1277 | |
| 1278 | if (unlikely(!(ect->flags & NETDATA_EBPF_SERVICES_HAS_DC_CHART))) { |
| 1279 | continue; |
| 1280 | } |
| 1281 | |
| 1282 | ebpf_write_begin_chart(ect->name, NETDATA_DC_HIT_CHART, ""); |
| 1283 | write_chart_dimension("percentage", (long long)ect->publish_dc.ratio); |
| 1284 | ebpf_write_end_chart(); |
| 1285 | |
| 1286 | ebpf_write_begin_chart(ect->name, NETDATA_DC_REFERENCE_CHART, ""); |
| 1287 | write_chart_dimension("files", (long long)ect->publish_dc.cache_access); |
| 1288 | ebpf_write_end_chart(); |
| 1289 | |
| 1290 | ebpf_write_begin_chart(ect->name, NETDATA_DC_REQUEST_NOT_CACHE_CHART, ""); |
| 1291 | value = (collected_number)(!ect->publish_dc.cache_access) ? |
| 1292 | 0 : |
| 1293 | (long long)ect->publish_dc.curr.file_system - (long long)ect->publish_dc.prev.file_system; |
| 1294 | ect->publish_dc.prev.file_system = ect->publish_dc.curr.file_system; |
| 1295 | write_chart_dimension("files", (long long)value); |
| 1296 | ebpf_write_end_chart(); |
| 1297 | |
| 1298 | ebpf_write_begin_chart(ect->name, NETDATA_DC_REQUEST_NOT_FOUND_CHART, ""); |
| 1299 | value = (collected_number)(!ect->publish_dc.cache_access) ? |
| 1300 | 0 : |
| 1301 | (long long)ect->publish_dc.curr.not_found - (long long)ect->publish_dc.prev.not_found; |
| 1302 | |
| 1303 | ect->publish_dc.prev.not_found = ect->publish_dc.curr.not_found; |
| 1304 | |
| 1305 | write_chart_dimension("files", (long long)value); |
| 1306 | ebpf_write_end_chart(); |
| 1307 | } |
| 1308 | } |
| 1309 | |
| 1310 | /** |
| 1311 | * Send Directory Cache charts |
| 1312 | * |
| 1313 | * Send collected data to Netdata. |
| 1314 | * |
| 1315 | */ |
| 1316 | static void ebpf_send_specific_dc_data(char *type, netdata_publish_dcstat_t *pdc) |
| 1317 | { |
| 1318 | collected_number value; |
| 1319 | ebpf_write_begin_chart(type, NETDATA_DC_HIT_CHART, ""); |
| 1320 | write_chart_dimension(dcstat_counter_publish_aggregated[NETDATA_DCSTAT_IDX_RATIO].name, (long long)pdc->ratio); |
| 1321 | ebpf_write_end_chart(); |
| 1322 | |
| 1323 | ebpf_write_begin_chart(type, NETDATA_DC_REFERENCE_CHART, ""); |
| 1324 | write_chart_dimension( |
| 1325 | dcstat_counter_publish_aggregated[NETDATA_DCSTAT_IDX_REFERENCE].name, (long long)pdc->cache_access); |
| 1326 | ebpf_write_end_chart(); |
| 1327 | |
| 1328 | value = (collected_number)(!pdc->cache_access) ? |
| 1329 | 0 : |
| 1330 | (long long)pdc->curr.file_system - (long long)pdc->prev.file_system; |
| 1331 | pdc->prev.file_system = pdc->curr.file_system; |
| 1332 | |
| 1333 | ebpf_write_begin_chart(type, NETDATA_DC_REQUEST_NOT_CACHE_CHART, ""); |
| 1334 | write_chart_dimension(dcstat_counter_publish_aggregated[NETDATA_DCSTAT_IDX_SLOW].name, (long long)value); |
| 1335 | ebpf_write_end_chart(); |
| 1336 | |
| 1337 | value = |
| 1338 | (collected_number)(!pdc->cache_access) ? 0 : (long long)pdc->curr.not_found - (long long)pdc->prev.not_found; |
| 1339 | pdc->prev.not_found = pdc->curr.not_found; |
| 1340 | |
| 1341 | ebpf_write_begin_chart(type, NETDATA_DC_REQUEST_NOT_FOUND_CHART, ""); |
| 1342 | write_chart_dimension(dcstat_counter_publish_aggregated[NETDATA_DCSTAT_IDX_MISS].name, (long long)value); |
| 1343 | ebpf_write_end_chart(); |
| 1344 | } |
| 1345 | |
| 1346 | /** |
| 1347 | * Send data to Netdata calling auxiliary functions. |
| 1348 | * |
| 1349 | * @param update_every value to overwrite the update frequency set by the server. |
| 1350 | */ |
| 1351 | void ebpf_dc_send_cgroup_data(int update_every) |
| 1352 | { |
| 1353 | netdata_mutex_lock(&mutex_cgroup_shm); |
| 1354 | ebpf_cgroup_target_t *ect; |
| 1355 | ebpf_dc_calc_chart_values(); |
| 1356 | |
| 1357 | if (ebpf_cgroup_systemd_enabled_get()) { |
| 1358 | if (ebpf_send_cgroup_chart_get()) { |
| 1359 | ebpf_create_systemd_dc_charts(update_every); |
| 1360 | } |
| 1361 | |
| 1362 | ebpf_send_systemd_dc_charts(); |
| 1363 | } |
| 1364 | |
| 1365 | for (ect = ebpf_cgroup_pids; ect; ect = ect->next) { |
| 1366 | if (ebpf_plugin_stop()) |
| 1367 | break; |
| 1368 | |
| 1369 | if (ect->systemd) |
| 1370 | continue; |
| 1371 | |
| 1372 | if (!(ect->flags & NETDATA_EBPF_CGROUP_HAS_DC_CHART) && ect->updated) { |
| 1373 | ebpf_create_specific_dc_charts(ect->name, update_every); |
| 1374 | ect->flags |= NETDATA_EBPF_CGROUP_HAS_DC_CHART; |
| 1375 | } |
| 1376 | |
| 1377 | if (ect->flags & NETDATA_EBPF_CGROUP_HAS_DC_CHART) { |
| 1378 | if (ect->updated) { |
| 1379 | ebpf_send_specific_dc_data(ect->name, &ect->publish_dc); |
| 1380 | } else { |
| 1381 | ebpf_obsolete_specific_dc_charts(ect->name, update_every); |
| 1382 | ect->flags &= ~NETDATA_EBPF_CGROUP_HAS_DC_CHART; |
| 1383 | } |
| 1384 | } |
| 1385 | } |
| 1386 | |
| 1387 | netdata_mutex_unlock(&mutex_cgroup_shm); |
| 1388 | } |
| 1389 | |
| 1390 | /** |
| 1391 | * Main loop for this collector. |
| 1392 | */ |
| 1393 | static void dcstat_collector(ebpf_module_t *em) |
| 1394 | { |
| 1395 | netdata_publish_dcstat_t publish; |
| 1396 | memset(&publish, 0, sizeof(publish)); |
| 1397 | int cgroups = em->cgroup_charts; |
| 1398 | int update_every = em->update_every; |
| 1399 | heartbeat_t hb; |
| 1400 | heartbeat_init(&hb, USEC_PER_SEC); |
| 1401 | int counter = update_every - 1; |
| 1402 | int maps_per_core = em->maps_per_core; |
| 1403 | uint32_t running_time = 0; |
| 1404 | uint32_t lifetime = em->lifetime; |
| 1405 | while (!ebpf_plugin_stop() && running_time < lifetime) { |
| 1406 | if (ebpf_plugin_stop()) |
| 1407 | break; |
| 1408 | |
| 1409 | heartbeat_next(&hb); |
| 1410 | |
| 1411 | if (ebpf_plugin_stop()) |
| 1412 | break; |
| 1413 | |
| 1414 | if (++counter != update_every) |
| 1415 | continue; |
| 1416 | |
| 1417 | counter = 0; |
| 1418 | netdata_apps_integration_flags_t apps = em->apps_charts; |
| 1419 | ebpf_dc_read_global_tables(maps_per_core); |
| 1420 | |
| 1421 | netdata_mutex_lock(&lock); |
| 1422 | |
| 1423 | dcstat_send_global(&publish); |
| 1424 | |
| 1425 | if (apps & NETDATA_EBPF_APPS_FLAG_CHART_CREATED) |
| 1426 | ebpf_dcache_send_apps_data(apps_groups_root_target); |
| 1427 | |
| 1428 | if (ebpf_plugin_stop()) { |
| 1429 | netdata_mutex_unlock(&lock); |
| 1430 | break; |
| 1431 | } |
| 1432 | |
| 1433 | if (cgroups && ebpf_cgroup_integration_active_get()) |
| 1434 | ebpf_dc_send_cgroup_data(update_every); |
| 1435 | |
| 1436 | netdata_mutex_unlock(&lock); |
| 1437 | |
| 1438 | if (ebpf_plugin_stop()) |
| 1439 | break; |
| 1440 | |
| 1441 | netdata_mutex_lock(&ebpf_exit_cleanup); |
| 1442 | if (running_time) |
| 1443 | running_time += update_every; |
| 1444 | else |
| 1445 | running_time = update_every; |
| 1446 | |
| 1447 | em->running_time = running_time; |
| 1448 | netdata_mutex_unlock(&ebpf_exit_cleanup); |
| 1449 | } |
| 1450 | } |
| 1451 | |
| 1452 | /***************************************************************** |
| 1453 | * |
| 1454 | * INITIALIZE THREAD |
| 1455 | * |
| 1456 | *****************************************************************/ |
| 1457 | |
| 1458 | /** |
| 1459 | * Create filesystem charts |
| 1460 | * |
| 1461 | * Call ebpf_create_chart to create the charts for the collector. |
| 1462 | * |
| 1463 | * @param update_every value to overwrite the update frequency set by the server. |
| 1464 | */ |
| 1465 | static void ebpf_create_dc_global_charts(int update_every) |
| 1466 | { |
| 1467 | ebpf_create_chart( |
| 1468 | NETDATA_FILESYSTEM_FAMILY, |
| 1469 | NETDATA_DC_HIT_CHART, |
| 1470 | "Percentage of files inside directory cache", |
| 1471 | EBPF_COMMON_UNITS_PERCENTAGE, |
| 1472 | NETDATA_DIRECTORY_CACHE_SUBMENU, |
| 1473 | NETDATA_FS_DC_HIT_RATIO_CONTEXT, |
| 1474 | NETDATA_EBPF_CHART_TYPE_LINE, |
| 1475 | 21200, |
| 1476 | ebpf_create_global_dimension, |
| 1477 | dcstat_counter_publish_aggregated, |
| 1478 | 1, |
| 1479 | update_every, |
| 1480 | NETDATA_EBPF_MODULE_NAME_DCSTAT); |
| 1481 | |
| 1482 | ebpf_create_chart( |
| 1483 | NETDATA_FILESYSTEM_FAMILY, |
| 1484 | NETDATA_DC_REFERENCE_CHART, |
| 1485 | "Variables used to calculate hit ratio.", |
| 1486 | EBPF_COMMON_UNITS_FILES, |
| 1487 | NETDATA_DIRECTORY_CACHE_SUBMENU, |
| 1488 | NETDATA_FS_DC_REFERENCE_CONTEXT, |
| 1489 | NETDATA_EBPF_CHART_TYPE_LINE, |
| 1490 | 21201, |
| 1491 | ebpf_create_global_dimension, |
| 1492 | &dcstat_counter_publish_aggregated[NETDATA_DCSTAT_IDX_REFERENCE], |
| 1493 | 3, |
| 1494 | update_every, |
| 1495 | NETDATA_EBPF_MODULE_NAME_DCSTAT); |
| 1496 | |
| 1497 | fflush(stdout); |
| 1498 | } |
| 1499 | |
| 1500 | /** |
| 1501 | * Allocate vectors used with this thread. |
| 1502 | * |
| 1503 | * We are not testing the return, because callocz does this and shutdown the software |
| 1504 | * case it was not possible to allocate. |
| 1505 | */ |
| 1506 | static void ebpf_dcstat_allocate_global_vectors() |
| 1507 | { |
| 1508 | dcstat_vector = callocz((size_t)ebpf_nprocs, sizeof(netdata_dcstat_pid_t)); |
| 1509 | dcstat_values = callocz((size_t)ebpf_nprocs, sizeof(netdata_idx_t)); |
| 1510 | |
| 1511 | memset(dcstat_counter_aggregated_data, 0, NETDATA_DCSTAT_IDX_END * sizeof(netdata_syscall_stat_t)); |
| 1512 | memset(dcstat_counter_publish_aggregated, 0, NETDATA_DCSTAT_IDX_END * sizeof(netdata_publish_syscall_t)); |
| 1513 | } |
| 1514 | |
| 1515 | /***************************************************************** |
| 1516 | * |
| 1517 | * MAIN THREAD |
| 1518 | * |
| 1519 | *****************************************************************/ |
| 1520 | |
| 1521 | /* |
| 1522 | * Load BPF |
| 1523 | * |
| 1524 | * Load BPF files. |
| 1525 | * |
| 1526 | * @param em the structure with configuration |
| 1527 | */ |
| 1528 | static int ebpf_dcstat_load_bpf(ebpf_module_t *em) |
| 1529 | { |
| 1530 | #ifdef LIBBPF_MAJOR_VERSION |
| 1531 | ebpf_define_map_type(dcstat_maps, em->maps_per_core, running_on_kernel); |
| 1532 | #endif |
| 1533 | |
| 1534 | int ret = 0; |
| 1535 | ebpf_adjust_apps_cgroup(em, em->targets[NETDATA_DC_TARGET_LOOKUP_FAST].mode); |
| 1536 | if (em->load & EBPF_LOAD_LEGACY) { |
| 1537 | em->probe_links = ebpf_load_program(ebpf_plugin_dir, em, running_on_kernel, isrh, &em->objects); |
| 1538 | if (!em->probe_links) { |
| 1539 | ret = -1; |
| 1540 | } |
| 1541 | } |
| 1542 | #ifdef LIBBPF_MAJOR_VERSION |
| 1543 | else { |
| 1544 | dc_bpf_obj = dc_bpf__open(); |
| 1545 | if (!dc_bpf_obj) |
| 1546 | ret = -1; |
| 1547 | else { |
| 1548 | ret = ebpf_dc_load_and_attach(dc_bpf_obj, em); |
| 1549 | if (ret) { |
| 1550 | dc_bpf__destroy(dc_bpf_obj); |
| 1551 | dc_bpf_obj = NULL; |
| 1552 | } |
| 1553 | } |
| 1554 | } |
| 1555 | #endif |
| 1556 | |
| 1557 | if (ret) |
| 1558 | netdata_log_error("%s %s", EBPF_DEFAULT_ERROR_MSG, em->info.thread_name); |
| 1559 | |
| 1560 | return ret; |
| 1561 | } |
| 1562 | |
| 1563 | /** |
| 1564 | * Directory Cache thread |
| 1565 | * |
| 1566 | * Thread used to make dcstat thread |
| 1567 | * |
| 1568 | * @param ptr a pointer to `struct ebpf_module` |
| 1569 | * |
| 1570 | * @return It always returns NULL |
| 1571 | */ |
| 1572 | void ebpf_dcstat_thread(void *ptr) |
| 1573 | { |
| 1574 | ebpf_module_t *em = (ebpf_module_t *)ptr; |
| 1575 | CLEANUP_FUNCTION_REGISTER(ebpf_dcstat_exit) cleanup_ptr = em; |
| 1576 | |
| 1577 | if (!ebpf_module_thread_has_valid_state(em)) { |
| 1578 | goto enddcstat; |
| 1579 | } |
| 1580 | |
| 1581 | em->maps = dcstat_maps; |
| 1582 | |
| 1583 | ebpf_update_pid_table(&dcstat_maps[NETDATA_DCSTAT_PID_STATS], em); |
| 1584 | |
| 1585 | ebpf_update_names(dc_optional_name, em); |
| 1586 | |
| 1587 | #ifdef LIBBPF_MAJOR_VERSION |
| 1588 | ebpf_adjust_thread_load(em, default_btf); |
| 1589 | #endif |
| 1590 | if (ebpf_dcstat_load_bpf(em)) { |
| 1591 | goto enddcstat; |
| 1592 | } |
| 1593 | ebpf_mark_program_loaded(); |
| 1594 | |
| 1595 | ebpf_dcstat_allocate_global_vectors(); |
| 1596 | |
| 1597 | int algorithms[NETDATA_DCSTAT_IDX_END] = { |
| 1598 | NETDATA_EBPF_ABSOLUTE_IDX, NETDATA_EBPF_ABSOLUTE_IDX, NETDATA_EBPF_ABSOLUTE_IDX, NETDATA_EBPF_ABSOLUTE_IDX}; |
| 1599 | |
| 1600 | ebpf_global_labels( |
| 1601 | dcstat_counter_aggregated_data, |
| 1602 | dcstat_counter_publish_aggregated, |
| 1603 | dcstat_counter_dimension_name, |
| 1604 | dcstat_counter_dimension_name, |
| 1605 | algorithms, |
| 1606 | NETDATA_DCSTAT_IDX_END); |
| 1607 | |
| 1608 | netdata_mutex_lock(&lock); |
| 1609 | ebpf_create_dc_global_charts(em->update_every); |
| 1610 | ebpf_update_stats(&plugin_statistics, em); |
| 1611 | ebpf_update_kernel_memory_with_vector(&plugin_statistics, em->maps, EBPF_ACTION_STAT_ADD); |
| 1612 | |
| 1613 | netdata_mutex_unlock(&lock); |
| 1614 | |
| 1615 | ebpf_read_dcstat.thread = |
| 1616 | nd_thread_create(ebpf_read_dcstat.name, NETDATA_THREAD_OPTION_DEFAULT, ebpf_read_dcstat_thread, em); |
| 1617 | |
| 1618 | dcstat_collector(em); |
| 1619 | |
| 1620 | enddcstat: |
| 1621 | ebpf_update_disabled_plugin_stats(em); |
| 1622 | } |