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