| 1 | // SPDX-License-Identifier: GPL-3.0-or-later |
| 2 | |
| 3 | #include "ebpf.h" |
| 4 | #include "ebpf_swap.h" |
| 5 | #include "libbpf_api/ebpf_library.h" |
| 6 | |
| 7 | static char *swap_dimension_name[NETDATA_SWAP_END] = {"read", "write"}; |
| 8 | static netdata_syscall_stat_t swap_aggregated_data[NETDATA_SWAP_END]; |
| 9 | static netdata_publish_syscall_t swap_publish_aggregated[NETDATA_SWAP_END]; |
| 10 | |
| 11 | static netdata_idx_t swap_hash_values[NETDATA_SWAP_END]; |
| 12 | static netdata_idx_t *swap_values = NULL; |
| 13 | |
| 14 | netdata_ebpf_swap_t *swap_vector = NULL; |
| 15 | |
| 16 | struct config swap_config = APPCONFIG_INITIALIZER; |
| 17 | |
| 18 | static ebpf_local_maps_t swap_maps[] = { |
| 19 | {.name = "tbl_pid_swap", |
| 20 | .internal_input = ND_EBPF_DEFAULT_PID_SIZE, |
| 21 | .user_input = 0, |
| 22 | .type = NETDATA_EBPF_MAP_RESIZABLE | NETDATA_EBPF_MAP_PID, |
| 23 | .map_fd = ND_EBPF_MAP_FD_NOT_INITIALIZED, |
| 24 | #ifdef LIBBPF_MAJOR_VERSION |
| 25 | .map_type = BPF_MAP_TYPE_PERCPU_HASH |
| 26 | #endif |
| 27 | }, |
| 28 | {.name = "swap_ctrl", |
| 29 | .internal_input = NETDATA_CONTROLLER_END, |
| 30 | .user_input = 0, |
| 31 | .type = NETDATA_EBPF_MAP_CONTROLLER, |
| 32 | .map_fd = ND_EBPF_MAP_FD_NOT_INITIALIZED, |
| 33 | #ifdef LIBBPF_MAJOR_VERSION |
| 34 | .map_type = BPF_MAP_TYPE_PERCPU_ARRAY |
| 35 | #endif |
| 36 | }, |
| 37 | {.name = "tbl_swap", |
| 38 | .internal_input = NETDATA_SWAP_END, |
| 39 | .user_input = 0, |
| 40 | .type = NETDATA_EBPF_MAP_STATIC, |
| 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, .internal_input = 0, .user_input = 0}}; |
| 47 | |
| 48 | netdata_ebpf_targets_t swap_targets[] = { |
| 49 | {.name = NULL, .mode = EBPF_LOAD_TRAMPOLINE}, |
| 50 | {.name = NULL, .mode = EBPF_LOAD_TRAMPOLINE}, |
| 51 | {.name = NULL, .mode = EBPF_LOAD_TRAMPOLINE}}; |
| 52 | |
| 53 | #define NETDATA_SWAP_KEY_WRITE_START (2) |
| 54 | static char *swap_functions[] = {"swap_readpage", "swap_read_folio", "swap_writepage", "__swap_writepage", NULL}; |
| 55 | static bool swap_safe_clean = false; |
| 56 | |
| 57 | struct netdata_static_thread ebpf_read_swap = { |
| 58 | .name = "EBPF_READ_SWAP", |
| 59 | .config_section = NULL, |
| 60 | .config_name = NULL, |
| 61 | .env_name = NULL, |
| 62 | .enabled = 1, |
| 63 | .thread = NULL, |
| 64 | .init_routine = NULL, |
| 65 | .start_routine = NULL}; |
| 66 | |
| 67 | #ifdef LIBBPF_MAJOR_VERSION |
| 68 | /** |
| 69 | * Disable probe |
| 70 | * |
| 71 | * Disable all probes to use exclusively another method. |
| 72 | * |
| 73 | * @param obj is the main structure for bpf objects |
| 74 | */ |
| 75 | static void ebpf_swap_disable_probe(struct swap_bpf *obj) |
| 76 | { |
| 77 | bpf_program__set_autoload(obj->progs.netdata_swap_readpage_probe, false); |
| 78 | bpf_program__set_autoload(obj->progs.netdata_swap_read_folio_probe, false); |
| 79 | bpf_program__set_autoload(obj->progs.netdata_swap_writepage_probe, false); |
| 80 | bpf_program__set_autoload(obj->progs.netdata___swap_writepage_probe, false); |
| 81 | } |
| 82 | |
| 83 | /** |
| 84 | * Disable specific probe |
| 85 | * |
| 86 | * Disable specific probes according to available functions |
| 87 | * |
| 88 | * @param obj is the main structure for bpf objects |
| 89 | */ |
| 90 | static inline void ebpf_swap_disable_specific_probe(struct swap_bpf *obj) |
| 91 | { |
| 92 | if (!strcmp(swap_targets[NETDATA_KEY_SWAP_READPAGE_CALL].name, swap_functions[NETDATA_KEY_SWAP_READPAGE_CALL])) { |
| 93 | bpf_program__set_autoload(obj->progs.netdata_swap_read_folio_probe, false); |
| 94 | bpf_program__set_autoload(obj->progs.netdata_swap_readpage_probe, true); |
| 95 | } else { |
| 96 | bpf_program__set_autoload(obj->progs.netdata_swap_read_folio_probe, true); |
| 97 | bpf_program__set_autoload(obj->progs.netdata_swap_readpage_probe, false); |
| 98 | } |
| 99 | |
| 100 | if (!strcmp(swap_targets[NETDATA_KEY_SWAP_WRITEPAGE_CALL].name, swap_functions[NETDATA_SWAP_KEY_WRITE_START])) { |
| 101 | bpf_program__set_autoload(obj->progs.netdata_swap_writepage_probe, true); |
| 102 | bpf_program__set_autoload(obj->progs.netdata___swap_writepage_probe, false); |
| 103 | } else { |
| 104 | bpf_program__set_autoload(obj->progs.netdata_swap_writepage_probe, false); |
| 105 | bpf_program__set_autoload(obj->progs.netdata___swap_writepage_probe, true); |
| 106 | } |
| 107 | } |
| 108 | |
| 109 | /* |
| 110 | * Disable trampoline |
| 111 | * |
| 112 | * Disable all trampoline to use exclusively another method. |
| 113 | * |
| 114 | * @param obj is the main structure for bpf objects. |
| 115 | */ |
| 116 | static void ebpf_swap_disable_trampoline(struct swap_bpf *obj) |
| 117 | { |
| 118 | bpf_program__set_autoload(obj->progs.netdata_swap_readpage_fentry, false); |
| 119 | bpf_program__set_autoload(obj->progs.netdata_swap_read_folio_fentry, false); |
| 120 | bpf_program__set_autoload(obj->progs.netdata_swap_writepage_fentry, false); |
| 121 | bpf_program__set_autoload(obj->progs.netdata___swap_writepage_fentry, false); |
| 122 | } |
| 123 | |
| 124 | /** |
| 125 | * Disable specific trampoline |
| 126 | * |
| 127 | * Disable specific trampolines according to available functions |
| 128 | * |
| 129 | * @param obj is the main structure for bpf objects |
| 130 | */ |
| 131 | static inline void ebpf_swap_disable_specific_trampoline(struct swap_bpf *obj) |
| 132 | { |
| 133 | if (!strcmp(swap_targets[NETDATA_KEY_SWAP_READPAGE_CALL].name, swap_functions[NETDATA_KEY_SWAP_READPAGE_CALL])) { |
| 134 | bpf_program__set_autoload(obj->progs.netdata_swap_read_folio_fentry, false); |
| 135 | bpf_program__set_autoload(obj->progs.netdata_swap_readpage_fentry, true); |
| 136 | } else { |
| 137 | bpf_program__set_autoload(obj->progs.netdata_swap_read_folio_fentry, true); |
| 138 | bpf_program__set_autoload(obj->progs.netdata_swap_readpage_fentry, false); |
| 139 | } |
| 140 | |
| 141 | if (!strcmp(swap_targets[NETDATA_KEY_SWAP_WRITEPAGE_CALL].name, swap_functions[NETDATA_SWAP_KEY_WRITE_START])) { |
| 142 | bpf_program__set_autoload(obj->progs.netdata_swap_writepage_fentry, true); |
| 143 | bpf_program__set_autoload(obj->progs.netdata___swap_writepage_fentry, false); |
| 144 | } else { |
| 145 | bpf_program__set_autoload(obj->progs.netdata_swap_writepage_fentry, false); |
| 146 | bpf_program__set_autoload(obj->progs.netdata___swap_writepage_fentry, true); |
| 147 | } |
| 148 | } |
| 149 | |
| 150 | /** |
| 151 | * Set trampoline target |
| 152 | * |
| 153 | * Set the targets we will monitor. |
| 154 | * |
| 155 | * @param obj is the main structure for bpf objects. |
| 156 | */ |
| 157 | static void ebpf_swap_set_trampoline_target(struct swap_bpf *obj) |
| 158 | { |
| 159 | bpf_program__set_attach_target( |
| 160 | obj->progs.netdata_swap_readpage_fentry, 0, swap_targets[NETDATA_KEY_SWAP_READPAGE_CALL].name); |
| 161 | |
| 162 | bpf_program__set_attach_target( |
| 163 | obj->progs.netdata_swap_writepage_fentry, 0, swap_targets[NETDATA_KEY_SWAP_WRITEPAGE_CALL].name); |
| 164 | } |
| 165 | |
| 166 | /** |
| 167 | * Mount Attach Probe |
| 168 | * |
| 169 | * Attach probes to target |
| 170 | * |
| 171 | * @param obj is the main structure for bpf objects. |
| 172 | * |
| 173 | * @return It returns 0 on success and -1 otherwise. |
| 174 | */ |
| 175 | static int ebpf_swap_attach_kprobe(struct swap_bpf *obj) |
| 176 | { |
| 177 | int ret; |
| 178 | if (!strcmp(swap_targets[NETDATA_KEY_SWAP_READPAGE_CALL].name, swap_functions[NETDATA_KEY_SWAP_READPAGE_CALL])) { |
| 179 | obj->links.netdata_swap_readpage_probe = bpf_program__attach_kprobe( |
| 180 | obj->progs.netdata_swap_readpage_probe, false, swap_targets[NETDATA_KEY_SWAP_READPAGE_CALL].name); |
| 181 | ret = libbpf_get_error(obj->links.netdata_swap_readpage_probe); |
| 182 | } else { |
| 183 | obj->links.netdata_swap_read_folio_probe = bpf_program__attach_kprobe( |
| 184 | obj->progs.netdata_swap_read_folio_probe, false, swap_targets[NETDATA_KEY_SWAP_READPAGE_CALL].name); |
| 185 | ret = libbpf_get_error(obj->links.netdata_swap_read_folio_probe); |
| 186 | } |
| 187 | if (ret) |
| 188 | return -1; |
| 189 | |
| 190 | if (!strcmp(swap_targets[NETDATA_KEY_SWAP_WRITEPAGE_CALL].name, swap_functions[NETDATA_SWAP_KEY_WRITE_START])) { |
| 191 | obj->links.netdata_swap_writepage_probe = bpf_program__attach_kprobe( |
| 192 | obj->progs.netdata_swap_writepage_probe, false, swap_targets[NETDATA_KEY_SWAP_WRITEPAGE_CALL].name); |
| 193 | ret = libbpf_get_error(obj->links.netdata_swap_writepage_probe); |
| 194 | } else { |
| 195 | obj->links.netdata___swap_writepage_probe = bpf_program__attach_kprobe( |
| 196 | obj->progs.netdata___swap_writepage_probe, false, swap_targets[NETDATA_KEY_SWAP_WRITEPAGE_CALL].name); |
| 197 | ret = libbpf_get_error(obj->links.netdata___swap_writepage_probe); |
| 198 | } |
| 199 | |
| 200 | if (ret) |
| 201 | return -1; |
| 202 | |
| 203 | return 0; |
| 204 | } |
| 205 | |
| 206 | /** |
| 207 | * Set hash tables |
| 208 | * |
| 209 | * Set the values for maps according the value given by kernel. |
| 210 | * |
| 211 | * @param obj is the main structure for bpf objects. |
| 212 | */ |
| 213 | static void ebpf_swap_set_hash_tables(struct swap_bpf *obj) |
| 214 | { |
| 215 | swap_maps[NETDATA_PID_SWAP_TABLE].map_fd = bpf_map__fd(obj->maps.tbl_pid_swap); |
| 216 | swap_maps[NETDATA_SWAP_CONTROLLER].map_fd = bpf_map__fd(obj->maps.swap_ctrl); |
| 217 | swap_maps[NETDATA_SWAP_GLOBAL_TABLE].map_fd = bpf_map__fd(obj->maps.tbl_swap); |
| 218 | } |
| 219 | |
| 220 | /** |
| 221 | * Adjust Map |
| 222 | * |
| 223 | * Resize maps according input from users. |
| 224 | * |
| 225 | * @param obj is the main structure for bpf objects. |
| 226 | * @param em structure with configuration |
| 227 | */ |
| 228 | static void ebpf_swap_adjust_map(struct swap_bpf *obj, ebpf_module_t *em) |
| 229 | { |
| 230 | ebpf_update_map_size( |
| 231 | obj->maps.tbl_pid_swap, &swap_maps[NETDATA_PID_SWAP_TABLE], em, bpf_map__name(obj->maps.tbl_pid_swap)); |
| 232 | |
| 233 | ebpf_update_map_type(obj->maps.tbl_pid_swap, &swap_maps[NETDATA_PID_SWAP_TABLE]); |
| 234 | ebpf_update_map_type(obj->maps.tbl_swap, &swap_maps[NETDATA_SWAP_GLOBAL_TABLE]); |
| 235 | ebpf_update_map_type(obj->maps.swap_ctrl, &swap_maps[NETDATA_SWAP_CONTROLLER]); |
| 236 | } |
| 237 | |
| 238 | /** |
| 239 | * Load and attach |
| 240 | * |
| 241 | * Load and attach the eBPF code in kernel. |
| 242 | * |
| 243 | * @param obj is the main structure for bpf objects. |
| 244 | * @param em structure with configuration |
| 245 | * |
| 246 | * @return it returns 0 on success and -1 otherwise |
| 247 | */ |
| 248 | static inline int ebpf_swap_load_and_attach(struct swap_bpf *obj, ebpf_module_t *em) |
| 249 | { |
| 250 | netdata_ebpf_targets_t *mt = em->targets; |
| 251 | netdata_ebpf_program_loaded_t test = mt[NETDATA_KEY_SWAP_READPAGE_CALL].mode; |
| 252 | |
| 253 | if (test == EBPF_LOAD_TRAMPOLINE) { |
| 254 | ebpf_swap_disable_probe(obj); |
| 255 | ebpf_swap_disable_specific_trampoline(obj); |
| 256 | |
| 257 | ebpf_swap_set_trampoline_target(obj); |
| 258 | } else { |
| 259 | ebpf_swap_disable_trampoline(obj); |
| 260 | ebpf_swap_disable_specific_probe(obj); |
| 261 | } |
| 262 | |
| 263 | ebpf_swap_adjust_map(obj, em); |
| 264 | |
| 265 | int ret = swap_bpf__load(obj); |
| 266 | if (ret) { |
| 267 | return ret; |
| 268 | } |
| 269 | |
| 270 | ret = (test == EBPF_LOAD_TRAMPOLINE) ? swap_bpf__attach(obj) : ebpf_swap_attach_kprobe(obj); |
| 271 | if (!ret) { |
| 272 | ebpf_swap_set_hash_tables(obj); |
| 273 | |
| 274 | ebpf_update_controller(swap_maps[NETDATA_SWAP_CONTROLLER].map_fd, em); |
| 275 | } |
| 276 | |
| 277 | return ret; |
| 278 | } |
| 279 | #endif |
| 280 | |
| 281 | /***************************************************************** |
| 282 | * |
| 283 | * FUNCTIONS TO CLOSE THE THREAD |
| 284 | * |
| 285 | *****************************************************************/ |
| 286 | |
| 287 | static void ebpf_obsolete_specific_swap_charts(char *type, int update_every); |
| 288 | |
| 289 | /** |
| 290 | * Obsolete services |
| 291 | * |
| 292 | * Obsolete all service charts created |
| 293 | * |
| 294 | * @param em a pointer to `struct ebpf_module` |
| 295 | */ |
| 296 | static void ebpf_obsolete_swap_services(ebpf_module_t *em, char *id) |
| 297 | { |
| 298 | static const char *charts[] = {NETDATA_MEM_SWAP_READ_CHART, NETDATA_MEM_SWAP_WRITE_CHART}; |
| 299 | static const char *contexts[] = {NETDATA_SYSTEMD_SWAP_READ_CONTEXT, NETDATA_CGROUP_SWAP_WRITE_CONTEXT}; |
| 300 | static const uint32_t orders[] = {20191, 20192}; |
| 301 | |
| 302 | int i; |
| 303 | for (i = 0; i < NETDATA_SWAP_END; i++) { |
| 304 | ebpf_write_chart_obsolete( |
| 305 | id, |
| 306 | charts[i], |
| 307 | "", |
| 308 | (i == 0) ? "Calls to function swap_readpage." : "Calls to function swap_writepage.", |
| 309 | EBPF_COMMON_UNITS_CALLS_PER_SEC, |
| 310 | NETDATA_SYSTEM_SWAP_SUBMENU, |
| 311 | NETDATA_EBPF_CHART_TYPE_LINE, |
| 312 | contexts[i], |
| 313 | orders[i], |
| 314 | em->update_every); |
| 315 | } |
| 316 | } |
| 317 | |
| 318 | /** |
| 319 | * Obsolete cgroup chart |
| 320 | * |
| 321 | * Send obsolete for all charts created before to close. |
| 322 | * |
| 323 | * @param em a pointer to `struct ebpf_module` |
| 324 | */ |
| 325 | static inline void ebpf_obsolete_swap_cgroup_charts(ebpf_module_t *em) |
| 326 | { |
| 327 | netdata_mutex_lock(&mutex_cgroup_shm); |
| 328 | |
| 329 | ebpf_cgroup_target_t *ect; |
| 330 | for (ect = ebpf_cgroup_pids; ect; ect = ect->next) { |
| 331 | if (ect->systemd) { |
| 332 | ebpf_obsolete_swap_services(em, ect->name); |
| 333 | |
| 334 | continue; |
| 335 | } |
| 336 | |
| 337 | ebpf_obsolete_specific_swap_charts(ect->name, em->update_every); |
| 338 | } |
| 339 | netdata_mutex_unlock(&mutex_cgroup_shm); |
| 340 | } |
| 341 | |
| 342 | /** |
| 343 | * Obsolete apps charts |
| 344 | * |
| 345 | * Obsolete apps charts. |
| 346 | * |
| 347 | * @param em a pointer to the structure with the default values. |
| 348 | */ |
| 349 | void ebpf_obsolete_swap_apps_charts(struct ebpf_module *em) |
| 350 | { |
| 351 | struct ebpf_target *w; |
| 352 | int update_every = em->update_every; |
| 353 | netdata_mutex_lock(&collect_data_mutex); |
| 354 | for (w = apps_groups_root_target; w; w = w->next) { |
| 355 | if (unlikely(!(w->charts_created & (1 << EBPF_MODULE_SWAP_IDX)))) |
| 356 | continue; |
| 357 | |
| 358 | ebpf_write_chart_obsolete( |
| 359 | NETDATA_APP_FAMILY, |
| 360 | w->clean_name, |
| 361 | "_ebpf_call_swap_readpage", |
| 362 | "Calls to function swap_readpage.", |
| 363 | EBPF_COMMON_UNITS_CALLS_PER_SEC, |
| 364 | NETDATA_EBPF_MEMORY_GROUP, |
| 365 | NETDATA_EBPF_CHART_TYPE_STACKED, |
| 366 | "app.ebpf_call_swap_readpage", |
| 367 | 20070, |
| 368 | update_every); |
| 369 | |
| 370 | ebpf_write_chart_obsolete( |
| 371 | NETDATA_APP_FAMILY, |
| 372 | w->clean_name, |
| 373 | "_ebpf_call_swap_writepage", |
| 374 | "Calls to function swap_writepage.", |
| 375 | EBPF_COMMON_UNITS_CALLS_PER_SEC, |
| 376 | NETDATA_EBPF_MEMORY_GROUP, |
| 377 | NETDATA_EBPF_CHART_TYPE_STACKED, |
| 378 | "app.ebpf_call_swap_writepage", |
| 379 | 20071, |
| 380 | update_every); |
| 381 | w->charts_created &= ~(1 << EBPF_MODULE_SWAP_IDX); |
| 382 | } |
| 383 | netdata_mutex_unlock(&collect_data_mutex); |
| 384 | } |
| 385 | |
| 386 | /** |
| 387 | * Obsolete global |
| 388 | * |
| 389 | * Obsolete global charts created by thread. |
| 390 | * |
| 391 | * @param em a pointer to `struct ebpf_module` |
| 392 | */ |
| 393 | static void ebpf_obsolete_swap_global(ebpf_module_t *em) |
| 394 | { |
| 395 | ebpf_write_chart_obsolete( |
| 396 | NETDATA_EBPF_MEMORY_GROUP, |
| 397 | NETDATA_MEM_SWAP_CHART, |
| 398 | "", |
| 399 | "Calls to access swap memory", |
| 400 | EBPF_COMMON_UNITS_CALLS_PER_SEC, |
| 401 | NETDATA_SYSTEM_SWAP_SUBMENU, |
| 402 | NETDATA_EBPF_CHART_TYPE_LINE, |
| 403 | "mem.swapcalls", |
| 404 | NETDATA_CHART_PRIO_MEM_SWAP_CALLS, |
| 405 | em->update_every); |
| 406 | } |
| 407 | |
| 408 | /** |
| 409 | * Swap exit |
| 410 | * |
| 411 | * Cancel thread and exit. |
| 412 | * |
| 413 | * @param ptr thread data. |
| 414 | */ |
| 415 | void ebpf_swap_unload_bpf(ebpf_module_t *em) |
| 416 | { |
| 417 | if ((em->load & EBPF_LOAD_LEGACY) && em->probe_links) { |
| 418 | if ((uintptr_t)em->objects < 4096) { |
| 419 | netdata_log_error( |
| 420 | "Invalid em->objects pointer (0x%lx) detected during swap cleanup, skipping bpf_object__close", |
| 421 | (unsigned long)em->objects); |
| 422 | freez(em->probe_links); |
| 423 | } else { |
| 424 | if (em->objects && em->probe_links) |
| 425 | ebpf_unload_legacy_code(em->objects, em->probe_links); |
| 426 | } |
| 427 | em->objects = NULL; |
| 428 | em->probe_links = NULL; |
| 429 | } |
| 430 | #ifdef LIBBPF_MAJOR_VERSION |
| 431 | else if (swap_bpf_obj) { |
| 432 | swap_bpf__destroy(swap_bpf_obj); |
| 433 | swap_bpf_obj = NULL; |
| 434 | } |
| 435 | #endif |
| 436 | } |
| 437 | |
| 438 | static void ebpf_swap_exit(void *pptr) |
| 439 | { |
| 440 | ebpf_module_t *em = CLEANUP_FUNCTION_GET_PTR(pptr); |
| 441 | if (!em) |
| 442 | return; |
| 443 | |
| 444 | ebpf_set_pid_map_fd(NETDATA_EBPF_PIDS_SWAP_IDX, -1); |
| 445 | |
| 446 | netdata_mutex_lock(&lock); |
| 447 | collect_pids &= ~(1 << EBPF_MODULE_SWAP_IDX); |
| 448 | netdata_mutex_unlock(&lock); |
| 449 | |
| 450 | if (ebpf_read_swap.thread) { |
| 451 | nd_thread_signal_cancel(ebpf_read_swap.thread); |
| 452 | nd_thread_join(ebpf_read_swap.thread); |
| 453 | } |
| 454 | |
| 455 | // Drop this module's bits from the shared PID pool so its slots don't |
| 456 | // stay pinned if the plugin keeps running after the module stops. |
| 457 | if (integration_shm && ebpf_shm_sem_wait_or_stop(shm_mutex_ebpf_integration)) { |
| 458 | netdata_ebpf_sweep_shm_for_module_unsafe(NETDATA_EBPF_PIDS_SWAP_IDX); |
| 459 | sem_post(shm_mutex_ebpf_integration); |
| 460 | } |
| 461 | |
| 462 | if (ebpf_module_enabled_get(em) == NETDATA_THREAD_EBPF_FUNCTION_RUNNING && !ebpf_plugin_stop()) { |
| 463 | netdata_mutex_lock(&lock); |
| 464 | if (em->cgroup_charts) { |
| 465 | ebpf_obsolete_swap_cgroup_charts(em); |
| 466 | fflush(stdout); |
| 467 | } |
| 468 | |
| 469 | if (em->apps_charts & NETDATA_EBPF_APPS_FLAG_CHART_CREATED) { |
| 470 | ebpf_obsolete_swap_apps_charts(em); |
| 471 | } |
| 472 | |
| 473 | ebpf_obsolete_swap_global(em); |
| 474 | |
| 475 | fflush(stdout); |
| 476 | netdata_mutex_unlock(&lock); |
| 477 | } |
| 478 | |
| 479 | if (!swap_safe_clean) { |
| 480 | netdata_mutex_lock(&ebpf_exit_cleanup); |
| 481 | ebpf_module_enabled_set(em, NETDATA_THREAD_EBPF_STOPPED); |
| 482 | netdata_mutex_unlock(&ebpf_exit_cleanup); |
| 483 | return; |
| 484 | } |
| 485 | |
| 486 | freez(swap_vector); |
| 487 | swap_vector = NULL; |
| 488 | freez(swap_values); |
| 489 | swap_values = NULL; |
| 490 | |
| 491 | if (!ebpf_plugin_stop() && em->functions.bpf_unload) |
| 492 | em->functions.bpf_unload(em); |
| 493 | |
| 494 | netdata_mutex_lock(&ebpf_exit_cleanup); |
| 495 | ebpf_module_enabled_set(em, NETDATA_THREAD_EBPF_STOPPED); |
| 496 | netdata_mutex_unlock(&ebpf_exit_cleanup); |
| 497 | } |
| 498 | |
| 499 | /***************************************************************** |
| 500 | * |
| 501 | * COLLECTOR THREAD |
| 502 | * |
| 503 | *****************************************************************/ |
| 504 | |
| 505 | /** |
| 506 | * Apps Accumulator |
| 507 | * |
| 508 | * Sum all values read from kernel and store in the first address. |
| 509 | * |
| 510 | * @param out the vector with read values. |
| 511 | * @param maps_per_core do I need to read all cores? |
| 512 | */ |
| 513 | static void swap_apps_accumulator(netdata_ebpf_swap_t *out, int maps_per_core) |
| 514 | { |
| 515 | int i, end = (maps_per_core) ? ebpf_nprocs : 1; |
| 516 | netdata_ebpf_swap_t *total = &out[0]; |
| 517 | for (i = 1; i < end; i++) { |
| 518 | if (ebpf_plugin_stop()) |
| 519 | break; |
| 520 | |
| 521 | netdata_ebpf_swap_t *w = &out[i]; |
| 522 | total->write += w->write; |
| 523 | total->read += w->read; |
| 524 | |
| 525 | if (!total->name[0] && w->name[0]) |
| 526 | strncpyz(total->name, w->name, sizeof(total->name) - 1); |
| 527 | } |
| 528 | } |
| 529 | |
| 530 | /** |
| 531 | * Update cgroup |
| 532 | * |
| 533 | * Update cgroup data based in |
| 534 | */ |
| 535 | static void ebpf_update_swap_cgroup(void) |
| 536 | { |
| 537 | ebpf_cgroup_target_t *ect; |
| 538 | netdata_mutex_lock(&mutex_cgroup_shm); |
| 539 | for (ect = ebpf_cgroup_pids; ect; ect = ect->next) { |
| 540 | if (ebpf_plugin_stop()) |
| 541 | break; |
| 542 | |
| 543 | struct pid_on_target2 *pids; |
| 544 | for (pids = ect->pids; pids; pids = pids->next) { |
| 545 | uint32_t pid = pids->pid; |
| 546 | netdata_publish_swap_t *out = &pids->swap; |
| 547 | netdata_ebpf_pid_stats_t *local_pid = netdata_ebpf_lookup_shm_pointer_unsafe(pid); |
| 548 | if (!local_pid || !(local_pid->threads & (1U << (NETDATA_EBPF_PIDS_SWAP_IDX << 1)))) |
| 549 | continue; |
| 550 | netdata_publish_swap_t *in = &local_pid->swap; |
| 551 | |
| 552 | memcpy(out, in, sizeof(netdata_publish_swap_t)); |
| 553 | } |
| 554 | } |
| 555 | netdata_mutex_unlock(&mutex_cgroup_shm); |
| 556 | } |
| 557 | |
| 558 | /** |
| 559 | * Sum PIDs |
| 560 | * |
| 561 | * Sum values for all targets. |
| 562 | * |
| 563 | * @param swap |
| 564 | * @param root |
| 565 | */ |
| 566 | static void ebpf_swap_sum_pids(netdata_publish_swap_t *swap, struct ebpf_pid_on_target *root) |
| 567 | { |
| 568 | uint64_t local_read = 0; |
| 569 | uint64_t local_write = 0; |
| 570 | |
| 571 | for (; root; root = root->next) { |
| 572 | uint32_t pid = root->pid; |
| 573 | netdata_ebpf_pid_stats_t *local_pid = netdata_ebpf_lookup_shm_pointer_unsafe(pid); |
| 574 | if (!local_pid || !(local_pid->threads & (1U << (NETDATA_EBPF_PIDS_SWAP_IDX << 1)))) |
| 575 | continue; |
| 576 | netdata_publish_swap_t *w = &local_pid->swap; |
| 577 | |
| 578 | local_write += w->write; |
| 579 | local_read += w->read; |
| 580 | } |
| 581 | |
| 582 | // These conditions were added, because we are using incremental algorithm |
| 583 | swap->write = (local_write >= swap->write) ? local_write : swap->write; |
| 584 | swap->read = (local_read >= swap->read) ? local_read : swap->read; |
| 585 | } |
| 586 | |
| 587 | /** |
| 588 | * Resume apps data |
| 589 | */ |
| 590 | void ebpf_swap_resume_apps_data(void) |
| 591 | { |
| 592 | struct ebpf_target *w; |
| 593 | netdata_mutex_lock(&collect_data_mutex); |
| 594 | for (w = apps_groups_root_target; w; w = w->next) { |
| 595 | if (ebpf_plugin_stop()) |
| 596 | break; |
| 597 | |
| 598 | if (unlikely(!(w->charts_created & (1 << EBPF_MODULE_SWAP_IDX)))) |
| 599 | continue; |
| 600 | |
| 601 | ebpf_swap_sum_pids(&w->swap, w->root_pid); |
| 602 | } |
| 603 | netdata_mutex_unlock(&collect_data_mutex); |
| 604 | } |
| 605 | |
| 606 | /** |
| 607 | * Read APPS table |
| 608 | * |
| 609 | * Read the apps table and store data inside the structure. |
| 610 | * |
| 611 | * @param maps_per_core do I need to read all cores? |
| 612 | */ |
| 613 | static void ebpf_read_swap_apps_table(int maps_per_core) |
| 614 | { |
| 615 | netdata_ebpf_swap_t *cv = swap_vector; |
| 616 | int fd = swap_maps[NETDATA_PID_SWAP_TABLE].map_fd; |
| 617 | size_t length = sizeof(netdata_ebpf_swap_t); |
| 618 | if (maps_per_core) |
| 619 | length *= ebpf_nprocs; |
| 620 | |
| 621 | uint32_t key = 0, next_key = 0; |
| 622 | while (bpf_map_get_next_key(fd, &key, &next_key) == 0) { |
| 623 | if (ebpf_plugin_stop()) |
| 624 | break; |
| 625 | |
| 626 | if (bpf_map_lookup_elem(fd, &key, cv)) { |
| 627 | goto end_swap_loop; |
| 628 | } |
| 629 | |
| 630 | swap_apps_accumulator(cv, maps_per_core); |
| 631 | |
| 632 | netdata_ebpf_pid_stats_t *local_pid = netdata_ebpf_get_shm_pointer_unsafe(key, NETDATA_EBPF_PIDS_SWAP_IDX); |
| 633 | if (!local_pid) |
| 634 | goto end_swap_loop; |
| 635 | netdata_publish_swap_t *publish = &local_pid->swap; |
| 636 | |
| 637 | if (!publish->ct || publish->ct != cv->ct) { |
| 638 | memcpy(publish, cv, sizeof(netdata_publish_swap_t)); |
| 639 | } else { |
| 640 | if (kill((pid_t)key, 0) == -1 && errno == ESRCH) { |
| 641 | if (netdata_ebpf_reset_shm_pointer_unsafe(fd, key, NETDATA_EBPF_PIDS_SWAP_IDX)) |
| 642 | memset(publish, 0, sizeof(*publish)); |
| 643 | } |
| 644 | } |
| 645 | |
| 646 | // We are cleaning to avoid passing data read from one process to other. |
| 647 | end_swap_loop: |
| 648 | memset(cv, 0, length); |
| 649 | key = next_key; |
| 650 | } |
| 651 | } |
| 652 | |
| 653 | /** |
| 654 | * SWAP thread |
| 655 | * |
| 656 | * Thread used to generate swap charts. |
| 657 | * |
| 658 | * @param ptr a pointer to `struct ebpf_module` |
| 659 | * |
| 660 | * @return It always return NULL |
| 661 | */ |
| 662 | void ebpf_read_swap_thread(void *ptr) |
| 663 | { |
| 664 | ebpf_module_t *em = (ebpf_module_t *)ptr; |
| 665 | |
| 666 | int maps_per_core = em->maps_per_core; |
| 667 | int update_every = em->update_every; |
| 668 | int collect_pid = (em->apps_charts || em->cgroup_charts); |
| 669 | if (!collect_pid) |
| 670 | return; |
| 671 | |
| 672 | int counter = update_every - 1; |
| 673 | |
| 674 | uint32_t lifetime = em->lifetime; |
| 675 | uint32_t running_time = 0; |
| 676 | int cgroups = em->cgroup_charts; |
| 677 | ebpf_set_pid_map_fd(NETDATA_EBPF_PIDS_SWAP_IDX, swap_maps[NETDATA_PID_SWAP_TABLE].map_fd); |
| 678 | |
| 679 | heartbeat_t hb; |
| 680 | heartbeat_init(&hb, USEC_PER_SEC); |
| 681 | while (!ebpf_plugin_stop() && running_time < lifetime) { |
| 682 | if (ebpf_plugin_stop()) |
| 683 | break; |
| 684 | |
| 685 | heartbeat_next(&hb); |
| 686 | if (ebpf_plugin_stop()) |
| 687 | break; |
| 688 | |
| 689 | if (++counter != update_every) |
| 690 | continue; |
| 691 | |
| 692 | if (!ebpf_shm_sem_wait_or_stop(shm_mutex_ebpf_integration)) { |
| 693 | if (errno != ECANCELED) |
| 694 | netdata_log_error("SWAP: Failed to wait on semaphore."); |
| 695 | break; |
| 696 | } |
| 697 | ebpf_read_swap_apps_table(maps_per_core); |
| 698 | ebpf_swap_resume_apps_data(); |
| 699 | if (ebpf_plugin_stop()) { |
| 700 | if (sem_post(shm_mutex_ebpf_integration)) |
| 701 | netdata_log_error("SWAP: Failed to post semaphore."); |
| 702 | break; |
| 703 | } |
| 704 | |
| 705 | if (cgroups && ebpf_cgroup_integration_active_get()) |
| 706 | ebpf_update_swap_cgroup(); |
| 707 | |
| 708 | if (sem_post(shm_mutex_ebpf_integration)) { |
| 709 | netdata_log_error("SWAP: Failed to post semaphore."); |
| 710 | break; |
| 711 | } |
| 712 | |
| 713 | counter = 0; |
| 714 | |
| 715 | if (ebpf_plugin_stop()) |
| 716 | break; |
| 717 | |
| 718 | netdata_mutex_lock(&ebpf_exit_cleanup); |
| 719 | running_time += update_every; |
| 720 | em->running_time = running_time; |
| 721 | netdata_mutex_unlock(&ebpf_exit_cleanup); |
| 722 | } |
| 723 | } |
| 724 | |
| 725 | /** |
| 726 | * Send global |
| 727 | * |
| 728 | * Send global charts to Netdata |
| 729 | */ |
| 730 | static void swap_send_global(void) |
| 731 | { |
| 732 | write_io_chart( |
| 733 | NETDATA_MEM_SWAP_CHART, |
| 734 | NETDATA_EBPF_MEMORY_GROUP, |
| 735 | swap_publish_aggregated[NETDATA_KEY_SWAP_WRITEPAGE_CALL].dimension, |
| 736 | (long long)swap_hash_values[NETDATA_KEY_SWAP_WRITEPAGE_CALL], |
| 737 | swap_publish_aggregated[NETDATA_KEY_SWAP_READPAGE_CALL].dimension, |
| 738 | (long long)swap_hash_values[NETDATA_KEY_SWAP_READPAGE_CALL]); |
| 739 | } |
| 740 | |
| 741 | /** |
| 742 | * Read global counter |
| 743 | * |
| 744 | * Read the table with number of calls to all functions |
| 745 | * |
| 746 | * @param stats vector used to read data from control table. |
| 747 | * @param maps_per_core do I need to read all cores? |
| 748 | */ |
| 749 | static void ebpf_swap_read_global_table(netdata_idx_t *stats, int maps_per_core) |
| 750 | { |
| 751 | ebpf_read_global_table_stats( |
| 752 | swap_hash_values, |
| 753 | swap_values, |
| 754 | swap_maps[NETDATA_SWAP_GLOBAL_TABLE].map_fd, |
| 755 | maps_per_core, |
| 756 | NETDATA_KEY_SWAP_READPAGE_CALL, |
| 757 | NETDATA_SWAP_END); |
| 758 | |
| 759 | ebpf_read_global_table_stats( |
| 760 | stats, |
| 761 | swap_values, |
| 762 | swap_maps[NETDATA_SWAP_CONTROLLER].map_fd, |
| 763 | maps_per_core, |
| 764 | NETDATA_CONTROLLER_PID_TABLE_ADD, |
| 765 | NETDATA_CONTROLLER_END); |
| 766 | } |
| 767 | |
| 768 | /** |
| 769 | * Send data to Netdata calling auxiliary functions. |
| 770 | * |
| 771 | * @param root the target list. |
| 772 | */ |
| 773 | void ebpf_swap_send_apps_data(struct ebpf_target *root) |
| 774 | { |
| 775 | struct ebpf_target *w; |
| 776 | netdata_mutex_lock(&collect_data_mutex); |
| 777 | for (w = root; w; w = w->next) { |
| 778 | if (ebpf_plugin_stop()) |
| 779 | break; |
| 780 | |
| 781 | if (unlikely(!(w->charts_created & (1 << EBPF_MODULE_SWAP_IDX)))) |
| 782 | continue; |
| 783 | |
| 784 | ebpf_write_begin_chart(NETDATA_APP_FAMILY, w->clean_name, "_ebpf_call_swap_readpage"); |
| 785 | write_chart_dimension("calls", (long long)w->swap.read); |
| 786 | ebpf_write_end_chart(); |
| 787 | |
| 788 | ebpf_write_begin_chart(NETDATA_APP_FAMILY, w->clean_name, "_ebpf_call_swap_writepage"); |
| 789 | write_chart_dimension("calls", (long long)w->swap.write); |
| 790 | ebpf_write_end_chart(); |
| 791 | } |
| 792 | netdata_mutex_unlock(&collect_data_mutex); |
| 793 | } |
| 794 | |
| 795 | /** |
| 796 | * Sum PIDs |
| 797 | * |
| 798 | * Sum values for all targets. |
| 799 | * |
| 800 | * @param swap |
| 801 | * @param root |
| 802 | */ |
| 803 | static void ebpf_swap_sum_cgroup_pids(netdata_publish_swap_t *swap, struct pid_on_target2 *pids) |
| 804 | { |
| 805 | uint64_t local_read = 0; |
| 806 | uint64_t local_write = 0; |
| 807 | |
| 808 | while (pids) { |
| 809 | netdata_publish_swap_t *w = &pids->swap; |
| 810 | local_write += w->write; |
| 811 | local_read += w->read; |
| 812 | |
| 813 | pids = pids->next; |
| 814 | } |
| 815 | |
| 816 | // These conditions were added, because we are using incremental algorithm |
| 817 | swap->write = (local_write >= swap->write) ? local_write : swap->write; |
| 818 | swap->read = (local_read >= swap->read) ? local_read : swap->read; |
| 819 | } |
| 820 | |
| 821 | /** |
| 822 | * Send swap chart dimension |
| 823 | * |
| 824 | * Send a single swap chart dimension. |
| 825 | * |
| 826 | * @param type The chart type (cgroup/systemd name) |
| 827 | * @param chart The chart name |
| 828 | * @param value The value to send |
| 829 | */ |
| 830 | static void swap_send_dimension(const char *type, const char *chart, uint64_t value) |
| 831 | { |
| 832 | ebpf_write_begin_chart(type, chart, ""); |
| 833 | write_chart_dimension("calls", (long long)value); |
| 834 | ebpf_write_end_chart(); |
| 835 | } |
| 836 | |
| 837 | /** |
| 838 | * Send Systemd charts |
| 839 | * |
| 840 | * Send collected data to Netdata. |
| 841 | */ |
| 842 | static void ebpf_send_systemd_swap_charts(void) |
| 843 | { |
| 844 | static const char *charts[] = {NETDATA_MEM_SWAP_READ_CHART, NETDATA_MEM_SWAP_WRITE_CHART}; |
| 845 | |
| 846 | ebpf_cgroup_target_t *ect; |
| 847 | for (ect = ebpf_cgroup_pids; ect; ect = ect->next) { |
| 848 | if (ebpf_plugin_stop()) |
| 849 | break; |
| 850 | |
| 851 | if (unlikely(!(ect->flags & NETDATA_EBPF_SERVICES_HAS_SWAP_CHART))) { |
| 852 | continue; |
| 853 | } |
| 854 | |
| 855 | swap_send_dimension(ect->name, charts[0], ect->publish_systemd_swap.read); |
| 856 | swap_send_dimension(ect->name, charts[1], ect->publish_systemd_swap.write); |
| 857 | } |
| 858 | } |
| 859 | |
| 860 | /** |
| 861 | * Create specific swap charts |
| 862 | * |
| 863 | * Create charts for cgroup/application. |
| 864 | * |
| 865 | * @param type the chart type. |
| 866 | * @param update_every value to overwrite the update frequency set by the server. |
| 867 | */ |
| 868 | static void ebpf_create_specific_swap_charts(char *type, int update_every) |
| 869 | { |
| 870 | char *label = (!strncmp(type, "cgroup_", 7)) ? &type[7] : type; |
| 871 | ebpf_create_chart( |
| 872 | type, |
| 873 | NETDATA_MEM_SWAP_READ_CHART, |
| 874 | "Calls to function swap_readpage.", |
| 875 | EBPF_COMMON_UNITS_CALLS_PER_SEC, |
| 876 | NETDATA_SYSTEM_SWAP_SUBMENU, |
| 877 | NETDATA_CGROUP_SWAP_READ_CONTEXT, |
| 878 | NETDATA_EBPF_CHART_TYPE_LINE, |
| 879 | NETDATA_CHART_PRIO_CGROUPS_CONTAINERS + 5100, |
| 880 | ebpf_create_global_dimension, |
| 881 | swap_publish_aggregated, |
| 882 | 1, |
| 883 | update_every, |
| 884 | NETDATA_EBPF_MODULE_NAME_SWAP); |
| 885 | ebpf_create_chart_labels("cgroup_name", label, RRDLABEL_SRC_AUTO); |
| 886 | ebpf_commit_label(); |
| 887 | |
| 888 | ebpf_create_chart( |
| 889 | type, |
| 890 | NETDATA_MEM_SWAP_WRITE_CHART, |
| 891 | "Calls to function swap_writepage.", |
| 892 | EBPF_COMMON_UNITS_CALLS_PER_SEC, |
| 893 | NETDATA_SYSTEM_SWAP_SUBMENU, |
| 894 | NETDATA_CGROUP_SWAP_WRITE_CONTEXT, |
| 895 | NETDATA_EBPF_CHART_TYPE_LINE, |
| 896 | NETDATA_CHART_PRIO_CGROUPS_CONTAINERS + 5101, |
| 897 | ebpf_create_global_dimension, |
| 898 | &swap_publish_aggregated[NETDATA_KEY_SWAP_WRITEPAGE_CALL], |
| 899 | 1, |
| 900 | update_every, |
| 901 | NETDATA_EBPF_MODULE_NAME_SWAP); |
| 902 | ebpf_create_chart_labels("cgroup_name", label, RRDLABEL_SRC_AUTO); |
| 903 | ebpf_commit_label(); |
| 904 | } |
| 905 | |
| 906 | /** |
| 907 | * Create specific swap charts |
| 908 | * |
| 909 | * Create charts for cgroup/application. |
| 910 | * |
| 911 | * @param type the chart type. |
| 912 | * @param update_every value to overwrite the update frequency set by the server. |
| 913 | */ |
| 914 | static void ebpf_obsolete_specific_swap_charts(char *type, int update_every) |
| 915 | { |
| 916 | static const char *charts[] = {NETDATA_MEM_SWAP_READ_CHART, NETDATA_MEM_SWAP_WRITE_CHART}; |
| 917 | static const char *contexts[] = {NETDATA_CGROUP_SWAP_READ_CONTEXT, NETDATA_CGROUP_SWAP_WRITE_CONTEXT}; |
| 918 | static const uint32_t offsets[] = {0, 1}; |
| 919 | |
| 920 | int i; |
| 921 | for (i = 0; i < NETDATA_SWAP_END; i++) { |
| 922 | ebpf_write_chart_obsolete( |
| 923 | type, |
| 924 | charts[i], |
| 925 | "", |
| 926 | (i == 0) ? "Calls to function swap_readpage." : "Calls to function swap_writepage.", |
| 927 | EBPF_COMMON_UNITS_CALLS_PER_SEC, |
| 928 | NETDATA_SYSTEM_SWAP_SUBMENU, |
| 929 | NETDATA_EBPF_CHART_TYPE_LINE, |
| 930 | contexts[i], |
| 931 | NETDATA_CHART_PRIO_CGROUPS_CONTAINERS + 5100 + offsets[i], |
| 932 | update_every); |
| 933 | } |
| 934 | } |
| 935 | |
| 936 | /* |
| 937 | * Send Specific Swap data |
| 938 | * |
| 939 | * Send data for specific cgroup/apps. |
| 940 | * |
| 941 | * @param type chart type |
| 942 | * @param values structure with values that will be sent to netdata |
| 943 | */ |
| 944 | static void ebpf_send_specific_swap_data(char *type, netdata_publish_swap_t *values) |
| 945 | { |
| 946 | ebpf_write_begin_chart(type, NETDATA_MEM_SWAP_READ_CHART, ""); |
| 947 | write_chart_dimension(swap_publish_aggregated[NETDATA_KEY_SWAP_READPAGE_CALL].name, (long long)values->read); |
| 948 | ebpf_write_end_chart(); |
| 949 | |
| 950 | ebpf_write_begin_chart(type, NETDATA_MEM_SWAP_WRITE_CHART, ""); |
| 951 | write_chart_dimension(swap_publish_aggregated[NETDATA_KEY_SWAP_WRITEPAGE_CALL].name, (long long)values->write); |
| 952 | ebpf_write_end_chart(); |
| 953 | } |
| 954 | |
| 955 | /** |
| 956 | * Create Systemd Swap Charts |
| 957 | * |
| 958 | * Create charts when systemd is enabled |
| 959 | * |
| 960 | * @param update_every value to overwrite the update frequency set by the server. |
| 961 | **/ |
| 962 | static void ebpf_create_systemd_swap_charts(int update_every) |
| 963 | { |
| 964 | static ebpf_systemd_args_t data_read = { |
| 965 | .title = "Calls to function swap_readpage.", |
| 966 | .units = EBPF_COMMON_UNITS_CALLS_PER_SEC, |
| 967 | .family = NETDATA_SYSTEM_SWAP_SUBMENU, |
| 968 | .charttype = NETDATA_EBPF_CHART_TYPE_STACKED, |
| 969 | .order = 20191, |
| 970 | .algorithm = EBPF_CHART_ALGORITHM_INCREMENTAL, |
| 971 | .context = NETDATA_SYSTEMD_SWAP_READ_CONTEXT, |
| 972 | .module = NETDATA_EBPF_MODULE_NAME_SWAP, |
| 973 | .update_every = 0, |
| 974 | .suffix = NETDATA_MEM_SWAP_READ_CHART, |
| 975 | .dimension = "calls"}; |
| 976 | |
| 977 | static ebpf_systemd_args_t data_write = { |
| 978 | .title = "Calls to function swap_writepage.", |
| 979 | .units = EBPF_COMMON_UNITS_CALLS_PER_SEC, |
| 980 | .family = NETDATA_SYSTEM_SWAP_SUBMENU, |
| 981 | .charttype = NETDATA_EBPF_CHART_TYPE_STACKED, |
| 982 | .order = 20192, |
| 983 | .algorithm = EBPF_CHART_ALGORITHM_INCREMENTAL, |
| 984 | .context = NETDATA_SYSTEMD_SWAP_WRITE_CONTEXT, |
| 985 | .module = NETDATA_EBPF_MODULE_NAME_SWAP, |
| 986 | .update_every = 0, |
| 987 | .suffix = NETDATA_MEM_SWAP_WRITE_CHART, |
| 988 | .dimension = "calls"}; |
| 989 | |
| 990 | if (!data_write.update_every) |
| 991 | data_read.update_every = data_write.update_every = update_every; |
| 992 | |
| 993 | ebpf_cgroup_target_t *w; |
| 994 | for (w = ebpf_cgroup_pids; w; w = w->next) { |
| 995 | if (ebpf_plugin_stop()) |
| 996 | break; |
| 997 | |
| 998 | if (unlikely(!w->systemd || w->flags & NETDATA_EBPF_SERVICES_HAS_SWAP_CHART)) |
| 999 | continue; |
| 1000 | |
| 1001 | data_read.id = data_write.id = w->name; |
| 1002 | ebpf_create_charts_on_systemd(&data_read); |
| 1003 | |
| 1004 | ebpf_create_charts_on_systemd(&data_write); |
| 1005 | |
| 1006 | w->flags |= NETDATA_EBPF_SERVICES_HAS_SWAP_CHART; |
| 1007 | } |
| 1008 | } |
| 1009 | |
| 1010 | /** |
| 1011 | * Send data to Netdata calling auxiliary functions. |
| 1012 | * |
| 1013 | * @param update_every value to overwrite the update frequency set by the server. |
| 1014 | */ |
| 1015 | void ebpf_swap_send_cgroup_data(int update_every) |
| 1016 | { |
| 1017 | netdata_mutex_lock(&mutex_cgroup_shm); |
| 1018 | ebpf_cgroup_target_t *ect; |
| 1019 | for (ect = ebpf_cgroup_pids; ect; ect = ect->next) { |
| 1020 | ebpf_swap_sum_cgroup_pids(&ect->publish_systemd_swap, ect->pids); |
| 1021 | } |
| 1022 | |
| 1023 | if (ebpf_plugin_stop()) { |
| 1024 | netdata_mutex_unlock(&mutex_cgroup_shm); |
| 1025 | return; |
| 1026 | } |
| 1027 | |
| 1028 | if (ebpf_cgroup_systemd_enabled_get()) { |
| 1029 | if (ebpf_send_cgroup_chart_get()) { |
| 1030 | ebpf_create_systemd_swap_charts(update_every); |
| 1031 | fflush(stdout); |
| 1032 | } |
| 1033 | ebpf_send_systemd_swap_charts(); |
| 1034 | } |
| 1035 | |
| 1036 | for (ect = ebpf_cgroup_pids; ect; ect = ect->next) { |
| 1037 | if (ebpf_plugin_stop()) |
| 1038 | break; |
| 1039 | |
| 1040 | if (ect->systemd) |
| 1041 | continue; |
| 1042 | |
| 1043 | if (!(ect->flags & NETDATA_EBPF_CGROUP_HAS_SWAP_CHART) && ect->updated) { |
| 1044 | ebpf_create_specific_swap_charts(ect->name, update_every); |
| 1045 | ect->flags |= NETDATA_EBPF_CGROUP_HAS_SWAP_CHART; |
| 1046 | } |
| 1047 | |
| 1048 | if (ect->flags & NETDATA_EBPF_CGROUP_HAS_SWAP_CHART) { |
| 1049 | if (ect->updated) { |
| 1050 | ebpf_send_specific_swap_data(ect->name, &ect->publish_systemd_swap); |
| 1051 | } else { |
| 1052 | ebpf_obsolete_specific_swap_charts(ect->name, update_every); |
| 1053 | ect->flags &= ~NETDATA_EBPF_CGROUP_HAS_SWAP_CHART; |
| 1054 | } |
| 1055 | } |
| 1056 | } |
| 1057 | |
| 1058 | netdata_mutex_unlock(&mutex_cgroup_shm); |
| 1059 | } |
| 1060 | |
| 1061 | /** |
| 1062 | * Main loop for this collector. |
| 1063 | */ |
| 1064 | static void swap_collector(ebpf_module_t *em) |
| 1065 | { |
| 1066 | int cgroup = em->cgroup_charts; |
| 1067 | int update_every = em->update_every; |
| 1068 | int counter = update_every - 1; |
| 1069 | int maps_per_core = em->maps_per_core; |
| 1070 | uint32_t running_time = 0; |
| 1071 | uint32_t lifetime = em->lifetime; |
| 1072 | netdata_idx_t *stats = em->hash_table_stats; |
| 1073 | memset(stats, 0, sizeof(em->hash_table_stats)); |
| 1074 | |
| 1075 | heartbeat_t hb; |
| 1076 | heartbeat_init(&hb, USEC_PER_SEC); |
| 1077 | while (!ebpf_plugin_stop() && running_time < lifetime) { |
| 1078 | if (ebpf_plugin_stop()) |
| 1079 | break; |
| 1080 | |
| 1081 | (void)heartbeat_next(&hb); |
| 1082 | if (ebpf_plugin_stop()) |
| 1083 | break; |
| 1084 | |
| 1085 | if (++counter != update_every) |
| 1086 | continue; |
| 1087 | |
| 1088 | counter = 0; |
| 1089 | netdata_apps_integration_flags_t apps = em->apps_charts; |
| 1090 | ebpf_swap_read_global_table(stats, maps_per_core); |
| 1091 | |
| 1092 | netdata_mutex_lock(&lock); |
| 1093 | |
| 1094 | swap_send_global(); |
| 1095 | |
| 1096 | if (apps & NETDATA_EBPF_APPS_FLAG_CHART_CREATED) |
| 1097 | ebpf_swap_send_apps_data(apps_groups_root_target); |
| 1098 | |
| 1099 | if (ebpf_plugin_stop()) { |
| 1100 | netdata_mutex_unlock(&lock); |
| 1101 | break; |
| 1102 | } |
| 1103 | |
| 1104 | if (cgroup && ebpf_cgroup_integration_active_get()) |
| 1105 | ebpf_swap_send_cgroup_data(update_every); |
| 1106 | |
| 1107 | netdata_mutex_unlock(&lock); |
| 1108 | |
| 1109 | if (ebpf_plugin_stop()) |
| 1110 | break; |
| 1111 | |
| 1112 | netdata_mutex_lock(&ebpf_exit_cleanup); |
| 1113 | running_time += update_every; |
| 1114 | em->running_time = running_time; |
| 1115 | netdata_mutex_unlock(&ebpf_exit_cleanup); |
| 1116 | } |
| 1117 | } |
| 1118 | |
| 1119 | /***************************************************************** |
| 1120 | * |
| 1121 | * INITIALIZE THREAD |
| 1122 | * |
| 1123 | *****************************************************************/ |
| 1124 | |
| 1125 | /** |
| 1126 | * Create apps charts |
| 1127 | * |
| 1128 | * Call ebpf_create_chart to create the charts on apps submenu. |
| 1129 | * |
| 1130 | * @param em a pointer to the structure with the default values. |
| 1131 | */ |
| 1132 | void ebpf_swap_create_apps_charts(struct ebpf_module *em, void *ptr) |
| 1133 | { |
| 1134 | struct ebpf_target *root = ptr; |
| 1135 | struct ebpf_target *w; |
| 1136 | int update_every = em->update_every; |
| 1137 | for (w = root; w; w = w->next) { |
| 1138 | if (unlikely(!w->exposed)) |
| 1139 | continue; |
| 1140 | |
| 1141 | ebpf_write_chart_cmd( |
| 1142 | NETDATA_APP_FAMILY, |
| 1143 | w->clean_name, |
| 1144 | "_ebpf_call_swap_readpage", |
| 1145 | "Calls to function swap_readpage.", |
| 1146 | EBPF_COMMON_UNITS_CALLS_PER_SEC, |
| 1147 | NETDATA_EBPF_MEMORY_GROUP, |
| 1148 | NETDATA_EBPF_CHART_TYPE_STACKED, |
| 1149 | "app.ebpf_call_swap_readpage", |
| 1150 | 20070, |
| 1151 | update_every, |
| 1152 | NETDATA_EBPF_MODULE_NAME_SWAP); |
| 1153 | ebpf_create_chart_labels("app_group", w->name, RRDLABEL_SRC_AUTO); |
| 1154 | ebpf_commit_label(); |
| 1155 | fprintf(stdout, "DIMENSION calls '' %s 1 1\n", ebpf_algorithms[NETDATA_EBPF_INCREMENTAL_IDX]); |
| 1156 | |
| 1157 | ebpf_write_chart_cmd( |
| 1158 | NETDATA_APP_FAMILY, |
| 1159 | w->clean_name, |
| 1160 | "_ebpf_call_swap_writepage", |
| 1161 | "Calls to function swap_writepage.", |
| 1162 | EBPF_COMMON_UNITS_CALLS_PER_SEC, |
| 1163 | NETDATA_EBPF_MEMORY_GROUP, |
| 1164 | NETDATA_EBPF_CHART_TYPE_STACKED, |
| 1165 | "app.ebpf_call_swap_writepage", |
| 1166 | 20071, |
| 1167 | update_every, |
| 1168 | NETDATA_EBPF_MODULE_NAME_SWAP); |
| 1169 | ebpf_create_chart_labels("app_group", w->name, RRDLABEL_SRC_AUTO); |
| 1170 | ebpf_commit_label(); |
| 1171 | fprintf(stdout, "DIMENSION calls '' %s 1 1\n", ebpf_algorithms[NETDATA_EBPF_INCREMENTAL_IDX]); |
| 1172 | |
| 1173 | w->charts_created |= 1 << EBPF_MODULE_SWAP_IDX; |
| 1174 | } |
| 1175 | em->apps_charts |= NETDATA_EBPF_APPS_FLAG_CHART_CREATED; |
| 1176 | } |
| 1177 | |
| 1178 | /** |
| 1179 | * Allocate vectors used with this thread. |
| 1180 | * |
| 1181 | * We are not testing the return, because callocz does this and shutdown the software |
| 1182 | * case it was not possible to allocate. |
| 1183 | */ |
| 1184 | static void ebpf_swap_allocate_global_vectors(void) |
| 1185 | { |
| 1186 | swap_vector = callocz((size_t)ebpf_nprocs, sizeof(netdata_ebpf_swap_t)); |
| 1187 | |
| 1188 | swap_values = callocz((size_t)ebpf_nprocs, sizeof(netdata_idx_t)); |
| 1189 | |
| 1190 | memset(swap_hash_values, 0, sizeof(swap_hash_values)); |
| 1191 | } |
| 1192 | |
| 1193 | /***************************************************************** |
| 1194 | * |
| 1195 | * MAIN THREAD |
| 1196 | * |
| 1197 | *****************************************************************/ |
| 1198 | |
| 1199 | /** |
| 1200 | * Create global charts |
| 1201 | * |
| 1202 | * Call ebpf_create_chart to create the charts for the collector. |
| 1203 | * |
| 1204 | * @param update_every value to overwrite the update frequency set by the server. |
| 1205 | */ |
| 1206 | static void ebpf_create_swap_charts(int update_every) |
| 1207 | { |
| 1208 | ebpf_create_chart( |
| 1209 | NETDATA_EBPF_MEMORY_GROUP, |
| 1210 | NETDATA_MEM_SWAP_CHART, |
| 1211 | "Calls to access swap memory", |
| 1212 | EBPF_COMMON_UNITS_CALLS_PER_SEC, |
| 1213 | NETDATA_SYSTEM_SWAP_SUBMENU, |
| 1214 | "mem.swapcalls", |
| 1215 | NETDATA_EBPF_CHART_TYPE_LINE, |
| 1216 | NETDATA_CHART_PRIO_MEM_SWAP_CALLS, |
| 1217 | ebpf_create_global_dimension, |
| 1218 | swap_publish_aggregated, |
| 1219 | NETDATA_SWAP_END, |
| 1220 | update_every, |
| 1221 | NETDATA_EBPF_MODULE_NAME_SWAP); |
| 1222 | |
| 1223 | fflush(stdout); |
| 1224 | } |
| 1225 | |
| 1226 | /* |
| 1227 | * Load BPF |
| 1228 | * |
| 1229 | * Load BPF files. |
| 1230 | * |
| 1231 | * @param em the structure with configuration |
| 1232 | */ |
| 1233 | static int ebpf_swap_load_bpf(ebpf_module_t *em) |
| 1234 | { |
| 1235 | #ifdef LIBBPF_MAJOR_VERSION |
| 1236 | ebpf_define_map_type(em->maps, em->maps_per_core, running_on_kernel); |
| 1237 | #endif |
| 1238 | |
| 1239 | int ret = 0; |
| 1240 | ebpf_adjust_apps_cgroup(em, em->targets[NETDATA_KEY_SWAP_READPAGE_CALL].mode); |
| 1241 | if (em->load & EBPF_LOAD_LEGACY) { |
| 1242 | em->probe_links = ebpf_load_program(ebpf_plugin_dir, em, running_on_kernel, isrh, &em->objects); |
| 1243 | if (!em->probe_links) { |
| 1244 | ret = -1; |
| 1245 | } |
| 1246 | } |
| 1247 | #ifdef LIBBPF_MAJOR_VERSION |
| 1248 | else { |
| 1249 | swap_bpf_obj = swap_bpf__open(); |
| 1250 | if (!swap_bpf_obj) |
| 1251 | ret = -1; |
| 1252 | else { |
| 1253 | ret = ebpf_swap_load_and_attach(swap_bpf_obj, em); |
| 1254 | if (ret) { |
| 1255 | swap_bpf__destroy(swap_bpf_obj); |
| 1256 | swap_bpf_obj = NULL; |
| 1257 | } |
| 1258 | } |
| 1259 | } |
| 1260 | #endif |
| 1261 | |
| 1262 | if (ret) |
| 1263 | netdata_log_error("%s %s", EBPF_DEFAULT_ERROR_MSG, em->info.thread_name); |
| 1264 | |
| 1265 | return ret; |
| 1266 | } |
| 1267 | |
| 1268 | /** |
| 1269 | * Update Internal value |
| 1270 | * |
| 1271 | * Update values used during runtime. |
| 1272 | * |
| 1273 | * @return It returns 0 when one of the functions is present and -1 otherwise. |
| 1274 | */ |
| 1275 | static int ebpf_swap_set_internal_value(void) |
| 1276 | { |
| 1277 | ebpf_addresses_t address = {.function = NULL, .hash = 0, .addr = 0, .type = 0}; |
| 1278 | int i; |
| 1279 | for (i = 0; swap_functions[i]; i++) { |
| 1280 | address.function = swap_functions[i]; |
| 1281 | ebpf_load_addresses(&address, -1); |
| 1282 | if (address.addr) { |
| 1283 | int key = (i < 2) ? NETDATA_KEY_SWAP_READPAGE_CALL : NETDATA_KEY_SWAP_WRITEPAGE_CALL; |
| 1284 | swap_targets[key].name = address.function; |
| 1285 | address.addr = 0; |
| 1286 | } |
| 1287 | } |
| 1288 | |
| 1289 | if (!swap_targets[NETDATA_KEY_SWAP_READPAGE_CALL].name || !swap_targets[NETDATA_KEY_SWAP_WRITEPAGE_CALL].name) { |
| 1290 | netdata_log_error( |
| 1291 | "%s (%s, %s) swap.", |
| 1292 | NETDATA_EBPF_DEFAULT_FNT_NOT_FOUND, |
| 1293 | swap_targets[NETDATA_KEY_SWAP_READPAGE_CALL].name, |
| 1294 | swap_targets[NETDATA_KEY_SWAP_WRITEPAGE_CALL].name); |
| 1295 | return -1; |
| 1296 | } |
| 1297 | |
| 1298 | return 0; |
| 1299 | } |
| 1300 | |
| 1301 | /** |
| 1302 | * SWAP thread |
| 1303 | * |
| 1304 | * Thread used to make swap thread |
| 1305 | * |
| 1306 | * @param ptr a pointer to `struct ebpf_module` |
| 1307 | * |
| 1308 | * @return It always return NULL |
| 1309 | */ |
| 1310 | void ebpf_swap_thread(void *ptr) |
| 1311 | { |
| 1312 | ebpf_set_pid_map_fd(NETDATA_EBPF_PIDS_SWAP_IDX, -1); |
| 1313 | ebpf_module_t *em = (ebpf_module_t *)ptr; |
| 1314 | |
| 1315 | CLEANUP_FUNCTION_REGISTER(ebpf_swap_exit) cleanup_ptr = em; |
| 1316 | |
| 1317 | if (!ebpf_module_thread_has_valid_state(em)) { |
| 1318 | goto endswap; |
| 1319 | } |
| 1320 | |
| 1321 | em->maps = swap_maps; |
| 1322 | |
| 1323 | ebpf_update_pid_table(&swap_maps[NETDATA_PID_SWAP_TABLE], em); |
| 1324 | |
| 1325 | if (ebpf_swap_set_internal_value()) { |
| 1326 | goto endswap; |
| 1327 | } |
| 1328 | |
| 1329 | #ifdef LIBBPF_MAJOR_VERSION |
| 1330 | ebpf_adjust_thread_load(em, default_btf); |
| 1331 | #endif |
| 1332 | if (ebpf_swap_load_bpf(em)) { |
| 1333 | goto endswap; |
| 1334 | } |
| 1335 | ebpf_mark_program_loaded(); |
| 1336 | |
| 1337 | ebpf_swap_allocate_global_vectors(); |
| 1338 | |
| 1339 | int algorithms[NETDATA_SWAP_END] = {NETDATA_EBPF_INCREMENTAL_IDX, NETDATA_EBPF_INCREMENTAL_IDX}; |
| 1340 | ebpf_global_labels( |
| 1341 | swap_aggregated_data, |
| 1342 | swap_publish_aggregated, |
| 1343 | swap_dimension_name, |
| 1344 | swap_dimension_name, |
| 1345 | algorithms, |
| 1346 | NETDATA_SWAP_END); |
| 1347 | |
| 1348 | netdata_mutex_lock(&lock); |
| 1349 | ebpf_create_swap_charts(em->update_every); |
| 1350 | ebpf_update_stats(&plugin_statistics, em); |
| 1351 | ebpf_update_kernel_memory_with_vector(&plugin_statistics, em->maps, EBPF_ACTION_STAT_ADD); |
| 1352 | netdata_mutex_unlock(&lock); |
| 1353 | |
| 1354 | ebpf_read_swap.thread = |
| 1355 | nd_thread_create(ebpf_read_swap.name, NETDATA_THREAD_OPTION_DEFAULT, ebpf_read_swap_thread, em); |
| 1356 | |
| 1357 | swap_safe_clean = true; |
| 1358 | swap_collector(em); |
| 1359 | |
| 1360 | endswap: |
| 1361 | ebpf_update_disabled_plugin_stats(em); |
| 1362 | } |