| 1 | /* |
| 2 | * Copyright (C) 2017 Jérémie Galarneau <jeremie.galarneau@efficios.com> |
| 3 | * |
| 4 | * SPDX-License-Identifier: LGPL-2.1-only |
| 5 | * |
| 6 | */ |
| 7 | |
| 8 | #include <assert.h> |
| 9 | #include <common/error.h> |
| 10 | #include <common/macros.h> |
| 11 | #include <common/mi-lttng.h> |
| 12 | #include <float.h> |
| 13 | #include <lttng/condition/buffer-usage-internal.h> |
| 14 | #include <lttng/condition/condition-internal.h> |
| 15 | #include <math.h> |
| 16 | #include <time.h> |
| 17 | |
| 18 | #define IS_USAGE_CONDITION(condition) ( \ |
| 19 | lttng_condition_get_type(condition) == LTTNG_CONDITION_TYPE_BUFFER_USAGE_LOW || \ |
| 20 | lttng_condition_get_type(condition) == LTTNG_CONDITION_TYPE_BUFFER_USAGE_HIGH \ |
| 21 | ) |
| 22 | |
| 23 | static |
| 24 | bool is_usage_evaluation(const struct lttng_evaluation *evaluation) |
| 25 | { |
| 26 | enum lttng_condition_type type = lttng_evaluation_get_type(evaluation); |
| 27 | |
| 28 | return type == LTTNG_CONDITION_TYPE_BUFFER_USAGE_LOW || |
| 29 | type == LTTNG_CONDITION_TYPE_BUFFER_USAGE_HIGH; |
| 30 | } |
| 31 | |
| 32 | static |
| 33 | void lttng_condition_buffer_usage_destroy(struct lttng_condition *condition) |
| 34 | { |
| 35 | struct lttng_condition_buffer_usage *usage; |
| 36 | |
| 37 | usage = container_of(condition, struct lttng_condition_buffer_usage, |
| 38 | parent); |
| 39 | |
| 40 | free(usage->session_name); |
| 41 | free(usage->channel_name); |
| 42 | free(usage); |
| 43 | } |
| 44 | |
| 45 | static |
| 46 | bool lttng_condition_buffer_usage_validate( |
| 47 | const struct lttng_condition *condition) |
| 48 | { |
| 49 | bool valid = false; |
| 50 | struct lttng_condition_buffer_usage *usage; |
| 51 | |
| 52 | if (!condition) { |
| 53 | goto end; |
| 54 | } |
| 55 | |
| 56 | usage = container_of(condition, struct lttng_condition_buffer_usage, |
| 57 | parent); |
| 58 | if (!usage->session_name) { |
| 59 | ERR("Invalid buffer condition: a target session name must be set."); |
| 60 | goto end; |
| 61 | } |
| 62 | if (!usage->channel_name) { |
| 63 | ERR("Invalid buffer condition: a target channel name must be set."); |
| 64 | goto end; |
| 65 | } |
| 66 | if (usage->threshold_ratio.set == usage->threshold_bytes.set) { |
| 67 | ERR("Invalid buffer condition: a threshold must be set or both type cannot be used simultaneously."); |
| 68 | goto end; |
| 69 | } |
| 70 | if (!usage->domain.set) { |
| 71 | ERR("Invalid buffer usage condition: a domain must be set."); |
| 72 | goto end; |
| 73 | } |
| 74 | |
| 75 | valid = true; |
| 76 | end: |
| 77 | return valid; |
| 78 | } |
| 79 | |
| 80 | static |
| 81 | int lttng_condition_buffer_usage_serialize( |
| 82 | const struct lttng_condition *condition, |
| 83 | struct lttng_payload *payload) |
| 84 | { |
| 85 | int ret; |
| 86 | struct lttng_condition_buffer_usage *usage; |
| 87 | size_t session_name_len, channel_name_len; |
| 88 | struct lttng_condition_buffer_usage_comm usage_comm = {}; |
| 89 | |
| 90 | if (!condition || !IS_USAGE_CONDITION(condition)) { |
| 91 | ret = -1; |
| 92 | goto end; |
| 93 | } |
| 94 | |
| 95 | DBG("Serializing buffer usage condition"); |
| 96 | usage = container_of(condition, struct lttng_condition_buffer_usage, |
| 97 | parent); |
| 98 | |
| 99 | session_name_len = strlen(usage->session_name) + 1; |
| 100 | channel_name_len = strlen(usage->channel_name) + 1; |
| 101 | if (session_name_len > LTTNG_NAME_MAX || |
| 102 | channel_name_len > LTTNG_NAME_MAX) { |
| 103 | ret = -1; |
| 104 | goto end; |
| 105 | } |
| 106 | |
| 107 | usage_comm.threshold_set_in_bytes = !!usage->threshold_bytes.set; |
| 108 | usage_comm.session_name_len = session_name_len; |
| 109 | usage_comm.channel_name_len = channel_name_len; |
| 110 | usage_comm.domain_type = (int8_t) usage->domain.type; |
| 111 | |
| 112 | if (usage->threshold_bytes.set) { |
| 113 | usage_comm.threshold_bytes = usage->threshold_bytes.value; |
| 114 | } else { |
| 115 | usage_comm.threshold_ratio = usage->threshold_ratio.value; |
| 116 | } |
| 117 | |
| 118 | ret = lttng_dynamic_buffer_append(&payload->buffer, &usage_comm, |
| 119 | sizeof(usage_comm)); |
| 120 | if (ret) { |
| 121 | goto end; |
| 122 | } |
| 123 | |
| 124 | ret = lttng_dynamic_buffer_append(&payload->buffer, usage->session_name, |
| 125 | session_name_len); |
| 126 | if (ret) { |
| 127 | goto end; |
| 128 | } |
| 129 | |
| 130 | ret = lttng_dynamic_buffer_append(&payload->buffer, usage->channel_name, |
| 131 | channel_name_len); |
| 132 | if (ret) { |
| 133 | goto end; |
| 134 | } |
| 135 | end: |
| 136 | return ret; |
| 137 | } |
| 138 | |
| 139 | static |
| 140 | bool lttng_condition_buffer_usage_is_equal(const struct lttng_condition *_a, |
| 141 | const struct lttng_condition *_b) |
| 142 | { |
| 143 | bool is_equal = false; |
| 144 | struct lttng_condition_buffer_usage *a, *b; |
| 145 | |
| 146 | a = container_of(_a, struct lttng_condition_buffer_usage, parent); |
| 147 | b = container_of(_b, struct lttng_condition_buffer_usage, parent); |
| 148 | |
| 149 | if ((a->threshold_ratio.set && !b->threshold_ratio.set) || |
| 150 | (a->threshold_bytes.set && !b->threshold_bytes.set)) { |
| 151 | goto end; |
| 152 | } |
| 153 | |
| 154 | if (a->threshold_ratio.set && b->threshold_ratio.set) { |
| 155 | double a_value, b_value, diff; |
| 156 | |
| 157 | a_value = a->threshold_ratio.value; |
| 158 | b_value = b->threshold_ratio.value; |
| 159 | diff = fabs(a_value - b_value); |
| 160 | |
| 161 | if (diff > DBL_EPSILON) { |
| 162 | goto end; |
| 163 | } |
| 164 | } else if (a->threshold_bytes.set && b->threshold_bytes.set) { |
| 165 | uint64_t a_value, b_value; |
| 166 | |
| 167 | a_value = a->threshold_bytes.value; |
| 168 | b_value = b->threshold_bytes.value; |
| 169 | if (a_value != b_value) { |
| 170 | goto end; |
| 171 | } |
| 172 | } |
| 173 | |
| 174 | /* Condition is not valid if this is not true. */ |
| 175 | assert(a->session_name); |
| 176 | assert(b->session_name); |
| 177 | if (strcmp(a->session_name, b->session_name)) { |
| 178 | goto end; |
| 179 | } |
| 180 | |
| 181 | assert(a->channel_name); |
| 182 | assert(b->channel_name); |
| 183 | if (strcmp(a->channel_name, b->channel_name)) { |
| 184 | goto end; |
| 185 | } |
| 186 | |
| 187 | assert(a->domain.set); |
| 188 | assert(b->domain.set); |
| 189 | if (a->domain.type != b->domain.type) { |
| 190 | goto end; |
| 191 | } |
| 192 | is_equal = true; |
| 193 | end: |
| 194 | return is_equal; |
| 195 | } |
| 196 | |
| 197 | static enum lttng_error_code lttng_condition_buffer_usage_mi_serialize( |
| 198 | const struct lttng_condition *condition, |
| 199 | struct mi_writer *writer) |
| 200 | { |
| 201 | int ret; |
| 202 | enum lttng_error_code ret_code; |
| 203 | enum lttng_condition_status status; |
| 204 | const char *session_name = NULL, *channel_name = NULL; |
| 205 | enum lttng_domain_type domain_type; |
| 206 | bool is_threshold_bytes = false; |
| 207 | double threshold_ratio; |
| 208 | uint64_t threshold_bytes; |
| 209 | const char *condition_type_str = NULL; |
| 210 | |
| 211 | assert(condition); |
| 212 | assert(IS_USAGE_CONDITION(condition)); |
| 213 | |
| 214 | status = lttng_condition_buffer_usage_get_session_name( |
| 215 | condition, &session_name); |
| 216 | assert(status == LTTNG_CONDITION_STATUS_OK); |
| 217 | assert(session_name); |
| 218 | |
| 219 | status = lttng_condition_buffer_usage_get_channel_name( |
| 220 | condition, &channel_name); |
| 221 | assert(status == LTTNG_CONDITION_STATUS_OK); |
| 222 | assert(session_name); |
| 223 | |
| 224 | status = lttng_condition_buffer_usage_get_domain_type( |
| 225 | condition, &domain_type); |
| 226 | assert(status == LTTNG_CONDITION_STATUS_OK); |
| 227 | |
| 228 | status = lttng_condition_buffer_usage_get_threshold( |
| 229 | condition, &threshold_bytes); |
| 230 | if (status == LTTNG_CONDITION_STATUS_OK) { |
| 231 | is_threshold_bytes = true; |
| 232 | } else if (status != LTTNG_CONDITION_STATUS_UNSET) { |
| 233 | /* Unexpected at this stage. */ |
| 234 | ret_code = LTTNG_ERR_INVALID; |
| 235 | goto end; |
| 236 | } |
| 237 | |
| 238 | if (!is_threshold_bytes) { |
| 239 | status = lttng_condition_buffer_usage_get_threshold_ratio( |
| 240 | condition, &threshold_ratio); |
| 241 | assert(status == LTTNG_CONDITION_STATUS_OK); |
| 242 | } |
| 243 | |
| 244 | switch (lttng_condition_get_type(condition)) { |
| 245 | case LTTNG_CONDITION_TYPE_BUFFER_USAGE_HIGH: |
| 246 | condition_type_str = |
| 247 | mi_lttng_element_condition_buffer_usage_high; |
| 248 | break; |
| 249 | case LTTNG_CONDITION_TYPE_BUFFER_USAGE_LOW: |
| 250 | condition_type_str = |
| 251 | mi_lttng_element_condition_buffer_usage_low; |
| 252 | break; |
| 253 | default: |
| 254 | abort(); |
| 255 | break; |
| 256 | } |
| 257 | |
| 258 | /* Open the sub type condition element. */ |
| 259 | ret = mi_lttng_writer_open_element(writer, condition_type_str); |
| 260 | if (ret) { |
| 261 | goto mi_error; |
| 262 | } |
| 263 | |
| 264 | /* Session name. */ |
| 265 | ret = mi_lttng_writer_write_element_string( |
| 266 | writer, mi_lttng_element_session_name, session_name); |
| 267 | if (ret) { |
| 268 | goto mi_error; |
| 269 | } |
| 270 | |
| 271 | /* Channel name. */ |
| 272 | ret = mi_lttng_writer_write_element_string(writer, |
| 273 | mi_lttng_element_condition_channel_name, channel_name); |
| 274 | if (ret) { |
| 275 | goto mi_error; |
| 276 | } |
| 277 | |
| 278 | /* Domain. */ |
| 279 | ret = mi_lttng_writer_write_element_string(writer, |
| 280 | config_element_domain, |
| 281 | mi_lttng_domaintype_string(domain_type)); |
| 282 | if (ret) { |
| 283 | goto mi_error; |
| 284 | } |
| 285 | |
| 286 | if (is_threshold_bytes) { |
| 287 | /* Usage in bytes. */ |
| 288 | ret = mi_lttng_writer_write_element_unsigned_int(writer, |
| 289 | mi_lttng_element_condition_threshold_bytes, |
| 290 | threshold_bytes); |
| 291 | if (ret) { |
| 292 | goto mi_error; |
| 293 | } |
| 294 | } else { |
| 295 | /* Ratio. */ |
| 296 | ret = mi_lttng_writer_write_element_double(writer, |
| 297 | mi_lttng_element_condition_threshold_ratio, |
| 298 | threshold_ratio); |
| 299 | if (ret) { |
| 300 | goto mi_error; |
| 301 | } |
| 302 | } |
| 303 | |
| 304 | /* Closing sub type condition element. */ |
| 305 | ret = mi_lttng_writer_close_element(writer); |
| 306 | if (ret) { |
| 307 | goto mi_error; |
| 308 | } |
| 309 | |
| 310 | ret_code = LTTNG_OK; |
| 311 | goto end; |
| 312 | |
| 313 | mi_error: |
| 314 | ret_code = LTTNG_ERR_MI_IO_FAIL; |
| 315 | end: |
| 316 | return ret_code; |
| 317 | } |
| 318 | |
| 319 | static |
| 320 | struct lttng_condition *lttng_condition_buffer_usage_create( |
| 321 | enum lttng_condition_type type) |
| 322 | { |
| 323 | struct lttng_condition_buffer_usage *condition; |
| 324 | |
| 325 | condition = zmalloc(sizeof(struct lttng_condition_buffer_usage)); |
| 326 | if (!condition) { |
| 327 | return NULL; |
| 328 | } |
| 329 | |
| 330 | lttng_condition_init(&condition->parent, type); |
| 331 | condition->parent.validate = lttng_condition_buffer_usage_validate; |
| 332 | condition->parent.serialize = lttng_condition_buffer_usage_serialize; |
| 333 | condition->parent.equal = lttng_condition_buffer_usage_is_equal; |
| 334 | condition->parent.destroy = lttng_condition_buffer_usage_destroy; |
| 335 | condition->parent.mi_serialize = lttng_condition_buffer_usage_mi_serialize; |
| 336 | return &condition->parent; |
| 337 | } |
| 338 | |
| 339 | struct lttng_condition *lttng_condition_buffer_usage_low_create(void) |
| 340 | { |
| 341 | return lttng_condition_buffer_usage_create( |
| 342 | LTTNG_CONDITION_TYPE_BUFFER_USAGE_LOW); |
| 343 | } |
| 344 | |
| 345 | struct lttng_condition *lttng_condition_buffer_usage_high_create(void) |
| 346 | { |
| 347 | return lttng_condition_buffer_usage_create( |
| 348 | LTTNG_CONDITION_TYPE_BUFFER_USAGE_HIGH); |
| 349 | } |
| 350 | |
| 351 | static |
| 352 | ssize_t init_condition_from_payload(struct lttng_condition *condition, |
| 353 | struct lttng_payload_view *src_view) |
| 354 | { |
| 355 | ssize_t ret, condition_size; |
| 356 | enum lttng_condition_status status; |
| 357 | enum lttng_domain_type domain_type; |
| 358 | const char *session_name, *channel_name; |
| 359 | struct lttng_buffer_view names_view; |
| 360 | const struct lttng_condition_buffer_usage_comm *condition_comm; |
| 361 | const struct lttng_payload_view condition_comm_view = |
| 362 | lttng_payload_view_from_view( |
| 363 | src_view, 0, sizeof(*condition_comm)); |
| 364 | |
| 365 | if (!lttng_payload_view_is_valid(&condition_comm_view)) { |
| 366 | ERR("Failed to initialize from malformed condition buffer: buffer too short to contain header"); |
| 367 | ret = -1; |
| 368 | goto end; |
| 369 | } |
| 370 | |
| 371 | condition_comm = (typeof(condition_comm)) condition_comm_view.buffer.data; |
| 372 | names_view = lttng_buffer_view_from_view(&src_view->buffer, |
| 373 | sizeof(*condition_comm), -1); |
| 374 | |
| 375 | if (condition_comm->session_name_len > LTTNG_NAME_MAX || |
| 376 | condition_comm->channel_name_len > LTTNG_NAME_MAX) { |
| 377 | ERR("Failed to initialize from malformed condition buffer: name exceeds LTTNG_MAX_NAME"); |
| 378 | ret = -1; |
| 379 | goto end; |
| 380 | } |
| 381 | |
| 382 | if (names_view.size < |
| 383 | (condition_comm->session_name_len + |
| 384 | condition_comm->channel_name_len)) { |
| 385 | ERR("Failed to initialize from malformed condition buffer: buffer too short to contain element names"); |
| 386 | ret = -1; |
| 387 | goto end; |
| 388 | } |
| 389 | |
| 390 | if (condition_comm->threshold_set_in_bytes) { |
| 391 | status = lttng_condition_buffer_usage_set_threshold(condition, |
| 392 | condition_comm->threshold_bytes); |
| 393 | } else { |
| 394 | status = lttng_condition_buffer_usage_set_threshold_ratio( |
| 395 | condition, condition_comm->threshold_ratio); |
| 396 | } |
| 397 | |
| 398 | if (status != LTTNG_CONDITION_STATUS_OK) { |
| 399 | ERR("Failed to initialize buffer usage condition threshold"); |
| 400 | ret = -1; |
| 401 | goto end; |
| 402 | } |
| 403 | |
| 404 | if (condition_comm->domain_type <= LTTNG_DOMAIN_NONE || |
| 405 | condition_comm->domain_type > LTTNG_DOMAIN_PYTHON) { |
| 406 | /* Invalid domain value. */ |
| 407 | ERR("Invalid domain type value (%i) found in condition buffer", |
| 408 | (int) condition_comm->domain_type); |
| 409 | ret = -1; |
| 410 | goto end; |
| 411 | } |
| 412 | |
| 413 | domain_type = (enum lttng_domain_type) condition_comm->domain_type; |
| 414 | status = lttng_condition_buffer_usage_set_domain_type(condition, |
| 415 | domain_type); |
| 416 | if (status != LTTNG_CONDITION_STATUS_OK) { |
| 417 | ERR("Failed to set buffer usage condition domain"); |
| 418 | ret = -1; |
| 419 | goto end; |
| 420 | } |
| 421 | |
| 422 | session_name = names_view.data; |
| 423 | if (*(session_name + condition_comm->session_name_len - 1) != '\0') { |
| 424 | ERR("Malformed session name encountered in condition buffer"); |
| 425 | ret = -1; |
| 426 | goto end; |
| 427 | } |
| 428 | |
| 429 | channel_name = session_name + condition_comm->session_name_len; |
| 430 | if (*(channel_name + condition_comm->channel_name_len - 1) != '\0') { |
| 431 | ERR("Malformed channel name encountered in condition buffer"); |
| 432 | ret = -1; |
| 433 | goto end; |
| 434 | } |
| 435 | |
| 436 | status = lttng_condition_buffer_usage_set_session_name(condition, |
| 437 | session_name); |
| 438 | if (status != LTTNG_CONDITION_STATUS_OK) { |
| 439 | ERR("Failed to set buffer usage session name"); |
| 440 | ret = -1; |
| 441 | goto end; |
| 442 | } |
| 443 | |
| 444 | status = lttng_condition_buffer_usage_set_channel_name(condition, |
| 445 | channel_name); |
| 446 | if (status != LTTNG_CONDITION_STATUS_OK) { |
| 447 | ERR("Failed to set buffer usage channel name"); |
| 448 | ret = -1; |
| 449 | goto end; |
| 450 | } |
| 451 | |
| 452 | if (!lttng_condition_validate(condition)) { |
| 453 | ret = -1; |
| 454 | goto end; |
| 455 | } |
| 456 | |
| 457 | condition_size = sizeof(*condition_comm) + |
| 458 | (ssize_t) condition_comm->session_name_len + |
| 459 | (ssize_t) condition_comm->channel_name_len; |
| 460 | ret = condition_size; |
| 461 | end: |
| 462 | return ret; |
| 463 | } |
| 464 | |
| 465 | LTTNG_HIDDEN |
| 466 | ssize_t lttng_condition_buffer_usage_low_create_from_payload( |
| 467 | struct lttng_payload_view *view, |
| 468 | struct lttng_condition **_condition) |
| 469 | { |
| 470 | ssize_t ret; |
| 471 | struct lttng_condition *condition = |
| 472 | lttng_condition_buffer_usage_low_create(); |
| 473 | |
| 474 | if (!_condition || !condition) { |
| 475 | ret = -1; |
| 476 | goto error; |
| 477 | } |
| 478 | |
| 479 | ret = init_condition_from_payload(condition, view); |
| 480 | if (ret < 0) { |
| 481 | goto error; |
| 482 | } |
| 483 | |
| 484 | *_condition = condition; |
| 485 | return ret; |
| 486 | error: |
| 487 | lttng_condition_destroy(condition); |
| 488 | return ret; |
| 489 | } |
| 490 | |
| 491 | LTTNG_HIDDEN |
| 492 | ssize_t lttng_condition_buffer_usage_high_create_from_payload( |
| 493 | struct lttng_payload_view *view, |
| 494 | struct lttng_condition **_condition) |
| 495 | { |
| 496 | ssize_t ret; |
| 497 | struct lttng_condition *condition = |
| 498 | lttng_condition_buffer_usage_high_create(); |
| 499 | |
| 500 | if (!_condition || !condition) { |
| 501 | ret = -1; |
| 502 | goto error; |
| 503 | } |
| 504 | |
| 505 | ret = init_condition_from_payload(condition, view); |
| 506 | if (ret < 0) { |
| 507 | goto error; |
| 508 | } |
| 509 | |
| 510 | *_condition = condition; |
| 511 | return ret; |
| 512 | error: |
| 513 | lttng_condition_destroy(condition); |
| 514 | return ret; |
| 515 | } |
| 516 | |
| 517 | static |
| 518 | struct lttng_evaluation *create_evaluation_from_payload( |
| 519 | enum lttng_condition_type type, |
| 520 | struct lttng_payload_view *view) |
| 521 | { |
| 522 | const struct lttng_evaluation_buffer_usage_comm *comm = |
| 523 | (typeof(comm)) view->buffer.data; |
| 524 | struct lttng_evaluation *evaluation = NULL; |
| 525 | |
| 526 | if (view->buffer.size < sizeof(*comm)) { |
| 527 | goto end; |
| 528 | } |
| 529 | |
| 530 | evaluation = lttng_evaluation_buffer_usage_create(type, |
| 531 | comm->buffer_use, comm->buffer_capacity); |
| 532 | end: |
| 533 | return evaluation; |
| 534 | } |
| 535 | |
| 536 | LTTNG_HIDDEN |
| 537 | ssize_t lttng_evaluation_buffer_usage_low_create_from_payload( |
| 538 | struct lttng_payload_view *view, |
| 539 | struct lttng_evaluation **_evaluation) |
| 540 | { |
| 541 | ssize_t ret; |
| 542 | struct lttng_evaluation *evaluation = NULL; |
| 543 | |
| 544 | if (!_evaluation) { |
| 545 | ret = -1; |
| 546 | goto error; |
| 547 | } |
| 548 | |
| 549 | evaluation = create_evaluation_from_payload( |
| 550 | LTTNG_CONDITION_TYPE_BUFFER_USAGE_LOW, view); |
| 551 | if (!evaluation) { |
| 552 | ret = -1; |
| 553 | goto error; |
| 554 | } |
| 555 | |
| 556 | *_evaluation = evaluation; |
| 557 | ret = sizeof(struct lttng_evaluation_buffer_usage_comm); |
| 558 | return ret; |
| 559 | error: |
| 560 | lttng_evaluation_destroy(evaluation); |
| 561 | return ret; |
| 562 | } |
| 563 | |
| 564 | LTTNG_HIDDEN |
| 565 | ssize_t lttng_evaluation_buffer_usage_high_create_from_payload( |
| 566 | struct lttng_payload_view *view, |
| 567 | struct lttng_evaluation **_evaluation) |
| 568 | { |
| 569 | ssize_t ret; |
| 570 | struct lttng_evaluation *evaluation = NULL; |
| 571 | |
| 572 | if (!_evaluation) { |
| 573 | ret = -1; |
| 574 | goto error; |
| 575 | } |
| 576 | |
| 577 | evaluation = create_evaluation_from_payload( |
| 578 | LTTNG_CONDITION_TYPE_BUFFER_USAGE_HIGH, view); |
| 579 | if (!evaluation) { |
| 580 | ret = -1; |
| 581 | goto error; |
| 582 | } |
| 583 | |
| 584 | *_evaluation = evaluation; |
| 585 | ret = sizeof(struct lttng_evaluation_buffer_usage_comm); |
| 586 | return ret; |
| 587 | error: |
| 588 | lttng_evaluation_destroy(evaluation); |
| 589 | return ret; |
| 590 | } |
| 591 | |
| 592 | enum lttng_condition_status |
| 593 | lttng_condition_buffer_usage_get_threshold_ratio( |
| 594 | const struct lttng_condition *condition, |
| 595 | double *threshold_ratio) |
| 596 | { |
| 597 | struct lttng_condition_buffer_usage *usage; |
| 598 | enum lttng_condition_status status = LTTNG_CONDITION_STATUS_OK; |
| 599 | |
| 600 | if (!condition || !IS_USAGE_CONDITION(condition) || |
| 601 | !threshold_ratio) { |
| 602 | status = LTTNG_CONDITION_STATUS_INVALID; |
| 603 | goto end; |
| 604 | } |
| 605 | |
| 606 | usage = container_of(condition, struct lttng_condition_buffer_usage, |
| 607 | parent); |
| 608 | if (!usage->threshold_ratio.set) { |
| 609 | status = LTTNG_CONDITION_STATUS_UNSET; |
| 610 | goto end; |
| 611 | } |
| 612 | *threshold_ratio = usage->threshold_ratio.value; |
| 613 | end: |
| 614 | return status; |
| 615 | } |
| 616 | |
| 617 | /* threshold_ratio expressed as [0.0, 1.0]. */ |
| 618 | enum lttng_condition_status |
| 619 | lttng_condition_buffer_usage_set_threshold_ratio( |
| 620 | struct lttng_condition *condition, double threshold_ratio) |
| 621 | { |
| 622 | struct lttng_condition_buffer_usage *usage; |
| 623 | enum lttng_condition_status status = LTTNG_CONDITION_STATUS_OK; |
| 624 | |
| 625 | if (!condition || !IS_USAGE_CONDITION(condition) || |
| 626 | threshold_ratio < 0.0 || |
| 627 | threshold_ratio > 1.0) { |
| 628 | status = LTTNG_CONDITION_STATUS_INVALID; |
| 629 | goto end; |
| 630 | } |
| 631 | |
| 632 | usage = container_of(condition, struct lttng_condition_buffer_usage, |
| 633 | parent); |
| 634 | usage->threshold_ratio.set = true; |
| 635 | usage->threshold_bytes.set = false; |
| 636 | usage->threshold_ratio.value = threshold_ratio; |
| 637 | end: |
| 638 | return status; |
| 639 | } |
| 640 | |
| 641 | enum lttng_condition_status |
| 642 | lttng_condition_buffer_usage_get_threshold( |
| 643 | const struct lttng_condition *condition, |
| 644 | uint64_t *threshold_bytes) |
| 645 | { |
| 646 | struct lttng_condition_buffer_usage *usage; |
| 647 | enum lttng_condition_status status = LTTNG_CONDITION_STATUS_OK; |
| 648 | |
| 649 | if (!condition || !IS_USAGE_CONDITION(condition) || !threshold_bytes) { |
| 650 | status = LTTNG_CONDITION_STATUS_INVALID; |
| 651 | goto end; |
| 652 | } |
| 653 | |
| 654 | usage = container_of(condition, struct lttng_condition_buffer_usage, |
| 655 | parent); |
| 656 | if (!usage->threshold_bytes.set) { |
| 657 | status = LTTNG_CONDITION_STATUS_UNSET; |
| 658 | goto end; |
| 659 | } |
| 660 | *threshold_bytes = usage->threshold_bytes.value; |
| 661 | end: |
| 662 | return status; |
| 663 | } |
| 664 | |
| 665 | enum lttng_condition_status |
| 666 | lttng_condition_buffer_usage_set_threshold( |
| 667 | struct lttng_condition *condition, uint64_t threshold_bytes) |
| 668 | { |
| 669 | struct lttng_condition_buffer_usage *usage; |
| 670 | enum lttng_condition_status status = LTTNG_CONDITION_STATUS_OK; |
| 671 | |
| 672 | if (!condition || !IS_USAGE_CONDITION(condition)) { |
| 673 | status = LTTNG_CONDITION_STATUS_INVALID; |
| 674 | goto end; |
| 675 | } |
| 676 | |
| 677 | usage = container_of(condition, struct lttng_condition_buffer_usage, |
| 678 | parent); |
| 679 | usage->threshold_ratio.set = false; |
| 680 | usage->threshold_bytes.set = true; |
| 681 | usage->threshold_bytes.value = threshold_bytes; |
| 682 | end: |
| 683 | return status; |
| 684 | } |
| 685 | |
| 686 | enum lttng_condition_status |
| 687 | lttng_condition_buffer_usage_get_session_name( |
| 688 | const struct lttng_condition *condition, |
| 689 | const char **session_name) |
| 690 | { |
| 691 | struct lttng_condition_buffer_usage *usage; |
| 692 | enum lttng_condition_status status = LTTNG_CONDITION_STATUS_OK; |
| 693 | |
| 694 | if (!condition || !IS_USAGE_CONDITION(condition) || !session_name) { |
| 695 | status = LTTNG_CONDITION_STATUS_INVALID; |
| 696 | goto end; |
| 697 | } |
| 698 | |
| 699 | usage = container_of(condition, struct lttng_condition_buffer_usage, |
| 700 | parent); |
| 701 | if (!usage->session_name) { |
| 702 | status = LTTNG_CONDITION_STATUS_UNSET; |
| 703 | goto end; |
| 704 | } |
| 705 | *session_name = usage->session_name; |
| 706 | end: |
| 707 | return status; |
| 708 | } |
| 709 | |
| 710 | enum lttng_condition_status |
| 711 | lttng_condition_buffer_usage_set_session_name( |
| 712 | struct lttng_condition *condition, const char *session_name) |
| 713 | { |
| 714 | char *session_name_copy; |
| 715 | struct lttng_condition_buffer_usage *usage; |
| 716 | enum lttng_condition_status status = LTTNG_CONDITION_STATUS_OK; |
| 717 | |
| 718 | if (!condition || !IS_USAGE_CONDITION(condition) || !session_name || |
| 719 | strlen(session_name) == 0) { |
| 720 | status = LTTNG_CONDITION_STATUS_INVALID; |
| 721 | goto end; |
| 722 | } |
| 723 | |
| 724 | usage = container_of(condition, struct lttng_condition_buffer_usage, |
| 725 | parent); |
| 726 | session_name_copy = strdup(session_name); |
| 727 | if (!session_name_copy) { |
| 728 | status = LTTNG_CONDITION_STATUS_ERROR; |
| 729 | goto end; |
| 730 | } |
| 731 | |
| 732 | if (usage->session_name) { |
| 733 | free(usage->session_name); |
| 734 | } |
| 735 | usage->session_name = session_name_copy; |
| 736 | end: |
| 737 | return status; |
| 738 | } |
| 739 | |
| 740 | enum lttng_condition_status |
| 741 | lttng_condition_buffer_usage_get_channel_name( |
| 742 | const struct lttng_condition *condition, |
| 743 | const char **channel_name) |
| 744 | { |
| 745 | struct lttng_condition_buffer_usage *usage; |
| 746 | enum lttng_condition_status status = LTTNG_CONDITION_STATUS_OK; |
| 747 | |
| 748 | if (!condition || !IS_USAGE_CONDITION(condition) || !channel_name) { |
| 749 | status = LTTNG_CONDITION_STATUS_INVALID; |
| 750 | goto end; |
| 751 | } |
| 752 | |
| 753 | usage = container_of(condition, struct lttng_condition_buffer_usage, |
| 754 | parent); |
| 755 | if (!usage->channel_name) { |
| 756 | status = LTTNG_CONDITION_STATUS_UNSET; |
| 757 | goto end; |
| 758 | } |
| 759 | *channel_name = usage->channel_name; |
| 760 | end: |
| 761 | return status; |
| 762 | } |
| 763 | |
| 764 | enum lttng_condition_status |
| 765 | lttng_condition_buffer_usage_set_channel_name( |
| 766 | struct lttng_condition *condition, const char *channel_name) |
| 767 | { |
| 768 | char *channel_name_copy; |
| 769 | struct lttng_condition_buffer_usage *usage; |
| 770 | enum lttng_condition_status status = LTTNG_CONDITION_STATUS_OK; |
| 771 | |
| 772 | if (!condition || !IS_USAGE_CONDITION(condition) || !channel_name || |
| 773 | strlen(channel_name) == 0) { |
| 774 | status = LTTNG_CONDITION_STATUS_INVALID; |
| 775 | goto end; |
| 776 | } |
| 777 | |
| 778 | usage = container_of(condition, struct lttng_condition_buffer_usage, |
| 779 | parent); |
| 780 | channel_name_copy = strdup(channel_name); |
| 781 | if (!channel_name_copy) { |
| 782 | status = LTTNG_CONDITION_STATUS_ERROR; |
| 783 | goto end; |
| 784 | } |
| 785 | |
| 786 | if (usage->channel_name) { |
| 787 | free(usage->channel_name); |
| 788 | } |
| 789 | usage->channel_name = channel_name_copy; |
| 790 | end: |
| 791 | return status; |
| 792 | } |
| 793 | |
| 794 | enum lttng_condition_status |
| 795 | lttng_condition_buffer_usage_get_domain_type( |
| 796 | const struct lttng_condition *condition, |
| 797 | enum lttng_domain_type *type) |
| 798 | { |
| 799 | struct lttng_condition_buffer_usage *usage; |
| 800 | enum lttng_condition_status status = LTTNG_CONDITION_STATUS_OK; |
| 801 | |
| 802 | if (!condition || !IS_USAGE_CONDITION(condition) || !type) { |
| 803 | status = LTTNG_CONDITION_STATUS_INVALID; |
| 804 | goto end; |
| 805 | } |
| 806 | |
| 807 | usage = container_of(condition, struct lttng_condition_buffer_usage, |
| 808 | parent); |
| 809 | if (!usage->domain.set) { |
| 810 | status = LTTNG_CONDITION_STATUS_UNSET; |
| 811 | goto end; |
| 812 | } |
| 813 | *type = usage->domain.type; |
| 814 | end: |
| 815 | return status; |
| 816 | } |
| 817 | |
| 818 | enum lttng_condition_status |
| 819 | lttng_condition_buffer_usage_set_domain_type( |
| 820 | struct lttng_condition *condition, enum lttng_domain_type type) |
| 821 | { |
| 822 | struct lttng_condition_buffer_usage *usage; |
| 823 | enum lttng_condition_status status = LTTNG_CONDITION_STATUS_OK; |
| 824 | |
| 825 | if (!condition || !IS_USAGE_CONDITION(condition) || |
| 826 | type == LTTNG_DOMAIN_NONE) { |
| 827 | status = LTTNG_CONDITION_STATUS_INVALID; |
| 828 | goto end; |
| 829 | } |
| 830 | |
| 831 | usage = container_of(condition, struct lttng_condition_buffer_usage, |
| 832 | parent); |
| 833 | usage->domain.set = true; |
| 834 | usage->domain.type = type; |
| 835 | end: |
| 836 | return status; |
| 837 | } |
| 838 | |
| 839 | static |
| 840 | int lttng_evaluation_buffer_usage_serialize( |
| 841 | const struct lttng_evaluation *evaluation, |
| 842 | struct lttng_payload *payload) |
| 843 | { |
| 844 | struct lttng_evaluation_buffer_usage *usage; |
| 845 | struct lttng_evaluation_buffer_usage_comm comm; |
| 846 | |
| 847 | usage = container_of(evaluation, struct lttng_evaluation_buffer_usage, |
| 848 | parent); |
| 849 | comm.buffer_use = usage->buffer_use; |
| 850 | comm.buffer_capacity = usage->buffer_capacity; |
| 851 | |
| 852 | return lttng_dynamic_buffer_append( |
| 853 | &payload->buffer, &comm, sizeof(comm)); |
| 854 | } |
| 855 | |
| 856 | static |
| 857 | void lttng_evaluation_buffer_usage_destroy( |
| 858 | struct lttng_evaluation *evaluation) |
| 859 | { |
| 860 | struct lttng_evaluation_buffer_usage *usage; |
| 861 | |
| 862 | usage = container_of(evaluation, struct lttng_evaluation_buffer_usage, |
| 863 | parent); |
| 864 | free(usage); |
| 865 | } |
| 866 | |
| 867 | LTTNG_HIDDEN |
| 868 | struct lttng_evaluation *lttng_evaluation_buffer_usage_create( |
| 869 | enum lttng_condition_type type, uint64_t use, uint64_t capacity) |
| 870 | { |
| 871 | struct lttng_evaluation_buffer_usage *usage; |
| 872 | |
| 873 | usage = zmalloc(sizeof(struct lttng_evaluation_buffer_usage)); |
| 874 | if (!usage) { |
| 875 | goto end; |
| 876 | } |
| 877 | |
| 878 | usage->parent.type = type; |
| 879 | usage->buffer_use = use; |
| 880 | usage->buffer_capacity = capacity; |
| 881 | usage->parent.serialize = lttng_evaluation_buffer_usage_serialize; |
| 882 | usage->parent.destroy = lttng_evaluation_buffer_usage_destroy; |
| 883 | end: |
| 884 | return &usage->parent; |
| 885 | } |
| 886 | |
| 887 | /* |
| 888 | * Get the sampled buffer usage which caused the associated condition to |
| 889 | * evaluate to "true". |
| 890 | */ |
| 891 | enum lttng_evaluation_status |
| 892 | lttng_evaluation_buffer_usage_get_usage_ratio( |
| 893 | const struct lttng_evaluation *evaluation, double *usage_ratio) |
| 894 | { |
| 895 | struct lttng_evaluation_buffer_usage *usage; |
| 896 | enum lttng_evaluation_status status = LTTNG_EVALUATION_STATUS_OK; |
| 897 | |
| 898 | if (!evaluation || !is_usage_evaluation(evaluation) || !usage_ratio) { |
| 899 | status = LTTNG_EVALUATION_STATUS_INVALID; |
| 900 | goto end; |
| 901 | } |
| 902 | |
| 903 | usage = container_of(evaluation, struct lttng_evaluation_buffer_usage, |
| 904 | parent); |
| 905 | *usage_ratio = (double) usage->buffer_use / |
| 906 | (double) usage->buffer_capacity; |
| 907 | end: |
| 908 | return status; |
| 909 | } |
| 910 | |
| 911 | enum lttng_evaluation_status |
| 912 | lttng_evaluation_buffer_usage_get_usage( |
| 913 | const struct lttng_evaluation *evaluation, |
| 914 | uint64_t *usage_bytes) |
| 915 | { |
| 916 | struct lttng_evaluation_buffer_usage *usage; |
| 917 | enum lttng_evaluation_status status = LTTNG_EVALUATION_STATUS_OK; |
| 918 | |
| 919 | if (!evaluation || !is_usage_evaluation(evaluation) || !usage_bytes) { |
| 920 | status = LTTNG_EVALUATION_STATUS_INVALID; |
| 921 | goto end; |
| 922 | } |
| 923 | |
| 924 | usage = container_of(evaluation, struct lttng_evaluation_buffer_usage, |
| 925 | parent); |
| 926 | *usage_bytes = usage->buffer_use; |
| 927 | end: |
| 928 | return status; |
| 929 | } |