| 1 | /* |
| 2 | * Copyright (C) 2017 - Jérémie Galarneau <jeremie.galarneau@efficios.com> |
| 3 | * |
| 4 | * This library is free software; you can redistribute it and/or modify it |
| 5 | * under the terms of the GNU Lesser General Public License, version 2.1 only, |
| 6 | * as published by the Free Software Foundation. |
| 7 | * |
| 8 | * This library is distributed in the hope that it will be useful, but WITHOUT |
| 9 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| 10 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License |
| 11 | * for more details. |
| 12 | * |
| 13 | * You should have received a copy of the GNU Lesser General Public License |
| 14 | * along with this library; if not, write to the Free Software Foundation, |
| 15 | * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
| 16 | */ |
| 17 | |
| 18 | #include <lttng/condition/condition-internal.h> |
| 19 | #include <lttng/condition/buffer-usage-internal.h> |
| 20 | #include <common/macros.h> |
| 21 | #include <common/error.h> |
| 22 | #include <assert.h> |
| 23 | #include <math.h> |
| 24 | #include <float.h> |
| 25 | #include <time.h> |
| 26 | |
| 27 | #define IS_USAGE_CONDITION(condition) ( \ |
| 28 | lttng_condition_get_type(condition) == LTTNG_CONDITION_TYPE_BUFFER_USAGE_LOW || \ |
| 29 | lttng_condition_get_type(condition) == LTTNG_CONDITION_TYPE_BUFFER_USAGE_HIGH \ |
| 30 | ) |
| 31 | |
| 32 | static |
| 33 | double fixed_to_double(uint32_t val) |
| 34 | { |
| 35 | return (double) val / (double) UINT32_MAX; |
| 36 | } |
| 37 | |
| 38 | static |
| 39 | uint64_t double_to_fixed(double val) |
| 40 | { |
| 41 | return (val * (double) UINT32_MAX); |
| 42 | } |
| 43 | |
| 44 | static |
| 45 | bool is_usage_evaluation(const struct lttng_evaluation *evaluation) |
| 46 | { |
| 47 | enum lttng_condition_type type = lttng_evaluation_get_type(evaluation); |
| 48 | |
| 49 | return type == LTTNG_CONDITION_TYPE_BUFFER_USAGE_LOW || |
| 50 | type == LTTNG_CONDITION_TYPE_BUFFER_USAGE_HIGH; |
| 51 | } |
| 52 | |
| 53 | static |
| 54 | void lttng_condition_buffer_usage_destroy(struct lttng_condition *condition) |
| 55 | { |
| 56 | struct lttng_condition_buffer_usage *usage; |
| 57 | |
| 58 | usage = container_of(condition, struct lttng_condition_buffer_usage, |
| 59 | parent); |
| 60 | |
| 61 | free(usage->session_name); |
| 62 | free(usage->channel_name); |
| 63 | free(usage); |
| 64 | } |
| 65 | |
| 66 | static |
| 67 | bool lttng_condition_buffer_usage_validate( |
| 68 | const struct lttng_condition *condition) |
| 69 | { |
| 70 | bool valid = false; |
| 71 | struct lttng_condition_buffer_usage *usage; |
| 72 | |
| 73 | if (!condition) { |
| 74 | goto end; |
| 75 | } |
| 76 | |
| 77 | usage = container_of(condition, struct lttng_condition_buffer_usage, |
| 78 | parent); |
| 79 | if (!usage->session_name) { |
| 80 | ERR("Invalid buffer condition: a target session name must be set."); |
| 81 | goto end; |
| 82 | } |
| 83 | if (!usage->channel_name) { |
| 84 | ERR("Invalid buffer condition: a target channel name must be set."); |
| 85 | goto end; |
| 86 | } |
| 87 | if (!usage->threshold_ratio.set && !usage->threshold_bytes.set) { |
| 88 | ERR("Invalid buffer condition: a threshold must be set."); |
| 89 | goto end; |
| 90 | } |
| 91 | |
| 92 | valid = true; |
| 93 | end: |
| 94 | return valid; |
| 95 | } |
| 96 | |
| 97 | static |
| 98 | ssize_t lttng_condition_buffer_usage_serialize( |
| 99 | const struct lttng_condition *condition, char *buf) |
| 100 | { |
| 101 | struct lttng_condition_buffer_usage *usage; |
| 102 | ssize_t ret, size; |
| 103 | size_t session_name_len, channel_name_len; |
| 104 | |
| 105 | if (!condition || !IS_USAGE_CONDITION(condition)) { |
| 106 | ret = -1; |
| 107 | goto end; |
| 108 | } |
| 109 | |
| 110 | DBG("Serializing buffer usage condition"); |
| 111 | usage = container_of(condition, struct lttng_condition_buffer_usage, |
| 112 | parent); |
| 113 | size = sizeof(struct lttng_condition_buffer_usage_comm); |
| 114 | session_name_len = strlen(usage->session_name) + 1; |
| 115 | channel_name_len = strlen(usage->channel_name) + 1; |
| 116 | if (session_name_len > LTTNG_NAME_MAX || |
| 117 | channel_name_len > LTTNG_NAME_MAX) { |
| 118 | ret = -1; |
| 119 | goto end; |
| 120 | } |
| 121 | size += session_name_len + channel_name_len; |
| 122 | if (buf) { |
| 123 | struct lttng_condition_buffer_usage_comm usage_comm = { |
| 124 | .threshold_set_in_bytes = usage->threshold_bytes.set ? 1 : 0, |
| 125 | .session_name_len = session_name_len, |
| 126 | .channel_name_len = channel_name_len, |
| 127 | .domain_type = (int8_t) usage->domain.type, |
| 128 | }; |
| 129 | |
| 130 | if (usage->threshold_bytes.set) { |
| 131 | usage_comm.threshold = usage->threshold_bytes.value; |
| 132 | } else { |
| 133 | uint64_t val = double_to_fixed( |
| 134 | usage->threshold_ratio.value); |
| 135 | |
| 136 | if (val > UINT32_MAX) { |
| 137 | /* overflow. */ |
| 138 | ret = -1; |
| 139 | goto end; |
| 140 | } |
| 141 | usage_comm.threshold = val; |
| 142 | } |
| 143 | |
| 144 | memcpy(buf, &usage_comm, sizeof(usage_comm)); |
| 145 | buf += sizeof(usage_comm); |
| 146 | memcpy(buf, usage->session_name, session_name_len); |
| 147 | buf += session_name_len; |
| 148 | memcpy(buf, usage->channel_name, channel_name_len); |
| 149 | buf += channel_name_len; |
| 150 | } |
| 151 | ret = size; |
| 152 | end: |
| 153 | return ret; |
| 154 | } |
| 155 | |
| 156 | static |
| 157 | bool lttng_condition_buffer_usage_is_equal(const struct lttng_condition *_a, |
| 158 | const struct lttng_condition *_b) |
| 159 | { |
| 160 | bool is_equal = false; |
| 161 | struct lttng_condition_buffer_usage *a, *b; |
| 162 | |
| 163 | a = container_of(_a, struct lttng_condition_buffer_usage, parent); |
| 164 | b = container_of(_b, struct lttng_condition_buffer_usage, parent); |
| 165 | |
| 166 | if ((a->threshold_ratio.set && !b->threshold_ratio.set) || |
| 167 | (a->threshold_bytes.set && !b->threshold_bytes.set)) { |
| 168 | goto end; |
| 169 | } |
| 170 | |
| 171 | if (a->threshold_ratio.set && b->threshold_ratio.set) { |
| 172 | double a_value, b_value, diff; |
| 173 | |
| 174 | a_value = a->threshold_ratio.value; |
| 175 | b_value = b->threshold_ratio.value; |
| 176 | diff = fabs(a_value - b_value); |
| 177 | |
| 178 | if (diff > DBL_EPSILON) { |
| 179 | goto end; |
| 180 | } |
| 181 | } else if (a->threshold_bytes.set && b->threshold_bytes.set) { |
| 182 | uint64_t a_value, b_value; |
| 183 | |
| 184 | a_value = a->threshold_bytes.value; |
| 185 | b_value = b->threshold_bytes.value; |
| 186 | if (a_value != b_value) { |
| 187 | goto end; |
| 188 | } |
| 189 | } |
| 190 | |
| 191 | if ((a->session_name && !b->session_name) || |
| 192 | (!a->session_name && b->session_name)) { |
| 193 | goto end; |
| 194 | } |
| 195 | |
| 196 | if (a->channel_name && b->channel_name) { |
| 197 | if (strcmp(a->channel_name, b->channel_name)) { |
| 198 | goto end; |
| 199 | } |
| 200 | } if ((a->channel_name && !b->channel_name) || |
| 201 | (!a->channel_name && b->channel_name)) { |
| 202 | goto end; |
| 203 | } |
| 204 | |
| 205 | if (a->channel_name && b->channel_name) { |
| 206 | if (strcmp(a->channel_name, b->channel_name)) { |
| 207 | goto end; |
| 208 | } |
| 209 | } |
| 210 | |
| 211 | if ((a->domain.set && !b->domain.set) || |
| 212 | (!a->domain.set && b->domain.set)) { |
| 213 | goto end; |
| 214 | } |
| 215 | |
| 216 | if (a->domain.set && b->domain.set) { |
| 217 | if (a->domain.type != b->domain.type) { |
| 218 | goto end; |
| 219 | } |
| 220 | } |
| 221 | is_equal = true; |
| 222 | end: |
| 223 | return is_equal; |
| 224 | } |
| 225 | |
| 226 | static |
| 227 | struct lttng_condition *lttng_condition_buffer_usage_create( |
| 228 | enum lttng_condition_type type) |
| 229 | { |
| 230 | struct lttng_condition_buffer_usage *condition; |
| 231 | |
| 232 | condition = zmalloc(sizeof(struct lttng_condition_buffer_usage)); |
| 233 | if (!condition) { |
| 234 | return NULL; |
| 235 | } |
| 236 | |
| 237 | lttng_condition_init(&condition->parent, type); |
| 238 | condition->parent.validate = lttng_condition_buffer_usage_validate; |
| 239 | condition->parent.serialize = lttng_condition_buffer_usage_serialize; |
| 240 | condition->parent.equal = lttng_condition_buffer_usage_is_equal; |
| 241 | condition->parent.destroy = lttng_condition_buffer_usage_destroy; |
| 242 | return &condition->parent; |
| 243 | } |
| 244 | |
| 245 | struct lttng_condition *lttng_condition_buffer_usage_low_create(void) |
| 246 | { |
| 247 | return lttng_condition_buffer_usage_create( |
| 248 | LTTNG_CONDITION_TYPE_BUFFER_USAGE_LOW); |
| 249 | } |
| 250 | |
| 251 | struct lttng_condition *lttng_condition_buffer_usage_high_create(void) |
| 252 | { |
| 253 | return lttng_condition_buffer_usage_create( |
| 254 | LTTNG_CONDITION_TYPE_BUFFER_USAGE_HIGH); |
| 255 | } |
| 256 | |
| 257 | static |
| 258 | ssize_t init_condition_from_buffer(struct lttng_condition *condition, |
| 259 | const struct lttng_buffer_view *src_view) |
| 260 | { |
| 261 | ssize_t ret, condition_size; |
| 262 | enum lttng_condition_status status; |
| 263 | enum lttng_domain_type domain_type; |
| 264 | const struct lttng_condition_buffer_usage_comm *condition_comm; |
| 265 | const char *session_name, *channel_name; |
| 266 | struct lttng_buffer_view names_view; |
| 267 | |
| 268 | if (src_view->size < sizeof(*condition_comm)) { |
| 269 | ERR("Failed to initialize from malformed condition buffer: buffer too short to contain header"); |
| 270 | ret = -1; |
| 271 | goto end; |
| 272 | } |
| 273 | |
| 274 | condition_comm = (const struct lttng_condition_buffer_usage_comm *) src_view->data; |
| 275 | names_view = lttng_buffer_view_from_view(src_view, |
| 276 | sizeof(*condition_comm), -1); |
| 277 | |
| 278 | if (condition_comm->session_name_len > LTTNG_NAME_MAX || |
| 279 | condition_comm->channel_name_len > LTTNG_NAME_MAX) { |
| 280 | ERR("Failed to initialize from malformed condition buffer: name exceeds LTTNG_MAX_NAME"); |
| 281 | ret = -1; |
| 282 | goto end; |
| 283 | } |
| 284 | |
| 285 | if (names_view.size < |
| 286 | (condition_comm->session_name_len + |
| 287 | condition_comm->channel_name_len)) { |
| 288 | ERR("Failed to initialize from malformed condition buffer: buffer too short to contain element names"); |
| 289 | ret = -1; |
| 290 | goto end; |
| 291 | } |
| 292 | |
| 293 | if (condition_comm->threshold_set_in_bytes) { |
| 294 | status = lttng_condition_buffer_usage_set_threshold(condition, |
| 295 | condition_comm->threshold); |
| 296 | } else { |
| 297 | status = lttng_condition_buffer_usage_set_threshold_ratio( |
| 298 | condition, |
| 299 | fixed_to_double(condition_comm->threshold)); |
| 300 | } |
| 301 | if (status != LTTNG_CONDITION_STATUS_OK) { |
| 302 | ERR("Failed to initialize buffer usage condition threshold"); |
| 303 | ret = -1; |
| 304 | goto end; |
| 305 | } |
| 306 | |
| 307 | if (condition_comm->domain_type <= LTTNG_DOMAIN_NONE || |
| 308 | condition_comm->domain_type > LTTNG_DOMAIN_PYTHON) { |
| 309 | /* Invalid domain value. */ |
| 310 | ERR("Invalid domain type value (%i) found in condition buffer", |
| 311 | (int) condition_comm->domain_type); |
| 312 | ret = -1; |
| 313 | goto end; |
| 314 | } |
| 315 | |
| 316 | domain_type = (enum lttng_domain_type) condition_comm->domain_type; |
| 317 | status = lttng_condition_buffer_usage_set_domain_type(condition, |
| 318 | domain_type); |
| 319 | if (status != LTTNG_CONDITION_STATUS_OK) { |
| 320 | ERR("Failed to set buffer usage condition domain"); |
| 321 | ret = -1; |
| 322 | goto end; |
| 323 | } |
| 324 | |
| 325 | session_name = names_view.data; |
| 326 | if (*(session_name + condition_comm->session_name_len - 1) != '\0') { |
| 327 | ERR("Malformed session name encountered in condition buffer"); |
| 328 | ret = -1; |
| 329 | goto end; |
| 330 | } |
| 331 | |
| 332 | channel_name = session_name + condition_comm->session_name_len; |
| 333 | if (*(channel_name + condition_comm->channel_name_len - 1) != '\0') { |
| 334 | ERR("Malformed channel name encountered in condition buffer"); |
| 335 | ret = -1; |
| 336 | goto end; |
| 337 | } |
| 338 | |
| 339 | status = lttng_condition_buffer_usage_set_session_name(condition, |
| 340 | session_name); |
| 341 | if (status != LTTNG_CONDITION_STATUS_OK) { |
| 342 | ERR("Failed to set buffer usage session name"); |
| 343 | ret = -1; |
| 344 | goto end; |
| 345 | } |
| 346 | |
| 347 | status = lttng_condition_buffer_usage_set_channel_name(condition, |
| 348 | channel_name); |
| 349 | if (status != LTTNG_CONDITION_STATUS_OK) { |
| 350 | ERR("Failed to set buffer usage channel name"); |
| 351 | ret = -1; |
| 352 | goto end; |
| 353 | } |
| 354 | |
| 355 | if (!lttng_condition_validate(condition)) { |
| 356 | ret = -1; |
| 357 | goto end; |
| 358 | } |
| 359 | |
| 360 | condition_size = sizeof(*condition_comm) + |
| 361 | (ssize_t) condition_comm->session_name_len + |
| 362 | (ssize_t) condition_comm->channel_name_len; |
| 363 | ret = condition_size; |
| 364 | end: |
| 365 | return ret; |
| 366 | } |
| 367 | |
| 368 | LTTNG_HIDDEN |
| 369 | ssize_t lttng_condition_buffer_usage_low_create_from_buffer( |
| 370 | const struct lttng_buffer_view *view, |
| 371 | struct lttng_condition **_condition) |
| 372 | { |
| 373 | ssize_t ret; |
| 374 | struct lttng_condition *condition = |
| 375 | lttng_condition_buffer_usage_low_create(); |
| 376 | |
| 377 | if (!_condition || !condition) { |
| 378 | ret = -1; |
| 379 | goto error; |
| 380 | } |
| 381 | |
| 382 | ret = init_condition_from_buffer(condition, view); |
| 383 | if (ret < 0) { |
| 384 | goto error; |
| 385 | } |
| 386 | |
| 387 | *_condition = condition; |
| 388 | return ret; |
| 389 | error: |
| 390 | lttng_condition_destroy(condition); |
| 391 | return ret; |
| 392 | } |
| 393 | |
| 394 | LTTNG_HIDDEN |
| 395 | ssize_t lttng_condition_buffer_usage_high_create_from_buffer( |
| 396 | const struct lttng_buffer_view *view, |
| 397 | struct lttng_condition **_condition) |
| 398 | { |
| 399 | ssize_t ret; |
| 400 | struct lttng_condition *condition = |
| 401 | lttng_condition_buffer_usage_high_create(); |
| 402 | |
| 403 | if (!_condition || !condition) { |
| 404 | ret = -1; |
| 405 | goto error; |
| 406 | } |
| 407 | |
| 408 | ret = init_condition_from_buffer(condition, view); |
| 409 | if (ret < 0) { |
| 410 | goto error; |
| 411 | } |
| 412 | |
| 413 | *_condition = condition; |
| 414 | return ret; |
| 415 | error: |
| 416 | lttng_condition_destroy(condition); |
| 417 | return ret; |
| 418 | } |
| 419 | |
| 420 | static |
| 421 | struct lttng_evaluation *create_evaluation_from_buffer( |
| 422 | enum lttng_condition_type type, |
| 423 | const struct lttng_buffer_view *view) |
| 424 | { |
| 425 | const struct lttng_evaluation_buffer_usage_comm *comm = |
| 426 | (const struct lttng_evaluation_buffer_usage_comm *) view->data; |
| 427 | struct lttng_evaluation *evaluation = NULL; |
| 428 | |
| 429 | if (view->size < sizeof(*comm)) { |
| 430 | goto end; |
| 431 | } |
| 432 | |
| 433 | evaluation = lttng_evaluation_buffer_usage_create(type, |
| 434 | comm->buffer_use, comm->buffer_capacity); |
| 435 | end: |
| 436 | return evaluation; |
| 437 | } |
| 438 | |
| 439 | LTTNG_HIDDEN |
| 440 | ssize_t lttng_evaluation_buffer_usage_low_create_from_buffer( |
| 441 | const struct lttng_buffer_view *view, |
| 442 | struct lttng_evaluation **_evaluation) |
| 443 | { |
| 444 | ssize_t ret; |
| 445 | struct lttng_evaluation *evaluation = NULL; |
| 446 | |
| 447 | if (!_evaluation) { |
| 448 | ret = -1; |
| 449 | goto error; |
| 450 | } |
| 451 | |
| 452 | evaluation = create_evaluation_from_buffer( |
| 453 | LTTNG_CONDITION_TYPE_BUFFER_USAGE_LOW, view); |
| 454 | if (!evaluation) { |
| 455 | ret = -1; |
| 456 | goto error; |
| 457 | } |
| 458 | |
| 459 | *_evaluation = evaluation; |
| 460 | ret = sizeof(struct lttng_evaluation_buffer_usage_comm); |
| 461 | return ret; |
| 462 | error: |
| 463 | lttng_evaluation_destroy(evaluation); |
| 464 | return ret; |
| 465 | } |
| 466 | |
| 467 | LTTNG_HIDDEN |
| 468 | ssize_t lttng_evaluation_buffer_usage_high_create_from_buffer( |
| 469 | const struct lttng_buffer_view *view, |
| 470 | struct lttng_evaluation **_evaluation) |
| 471 | { |
| 472 | ssize_t ret; |
| 473 | struct lttng_evaluation *evaluation = NULL; |
| 474 | |
| 475 | if (!_evaluation) { |
| 476 | ret = -1; |
| 477 | goto error; |
| 478 | } |
| 479 | |
| 480 | evaluation = create_evaluation_from_buffer( |
| 481 | LTTNG_CONDITION_TYPE_BUFFER_USAGE_HIGH, view); |
| 482 | if (!evaluation) { |
| 483 | ret = -1; |
| 484 | goto error; |
| 485 | } |
| 486 | |
| 487 | *_evaluation = evaluation; |
| 488 | ret = sizeof(struct lttng_evaluation_buffer_usage_comm); |
| 489 | return ret; |
| 490 | error: |
| 491 | lttng_evaluation_destroy(evaluation); |
| 492 | return ret; |
| 493 | } |
| 494 | |
| 495 | enum lttng_condition_status |
| 496 | lttng_condition_buffer_usage_get_threshold_ratio( |
| 497 | const struct lttng_condition *condition, |
| 498 | double *threshold_ratio) |
| 499 | { |
| 500 | struct lttng_condition_buffer_usage *usage; |
| 501 | enum lttng_condition_status status = LTTNG_CONDITION_STATUS_OK; |
| 502 | |
| 503 | if (!condition || !IS_USAGE_CONDITION(condition) || |
| 504 | !threshold_ratio) { |
| 505 | status = LTTNG_CONDITION_STATUS_INVALID; |
| 506 | goto end; |
| 507 | } |
| 508 | |
| 509 | usage = container_of(condition, struct lttng_condition_buffer_usage, |
| 510 | parent); |
| 511 | if (!usage->threshold_ratio.set) { |
| 512 | status = LTTNG_CONDITION_STATUS_UNSET; |
| 513 | goto end; |
| 514 | } |
| 515 | *threshold_ratio = usage->threshold_ratio.value; |
| 516 | end: |
| 517 | return status; |
| 518 | } |
| 519 | |
| 520 | /* threshold_ratio expressed as [0.0, 1.0]. */ |
| 521 | enum lttng_condition_status |
| 522 | lttng_condition_buffer_usage_set_threshold_ratio( |
| 523 | struct lttng_condition *condition, double threshold_ratio) |
| 524 | { |
| 525 | struct lttng_condition_buffer_usage *usage; |
| 526 | enum lttng_condition_status status = LTTNG_CONDITION_STATUS_OK; |
| 527 | |
| 528 | if (!condition || !IS_USAGE_CONDITION(condition) || |
| 529 | threshold_ratio < 0.0 || |
| 530 | threshold_ratio > 1.0) { |
| 531 | status = LTTNG_CONDITION_STATUS_INVALID; |
| 532 | goto end; |
| 533 | } |
| 534 | |
| 535 | usage = container_of(condition, struct lttng_condition_buffer_usage, |
| 536 | parent); |
| 537 | usage->threshold_ratio.set = true; |
| 538 | usage->threshold_bytes.set = false; |
| 539 | usage->threshold_ratio.value = threshold_ratio; |
| 540 | end: |
| 541 | return status; |
| 542 | } |
| 543 | |
| 544 | enum lttng_condition_status |
| 545 | lttng_condition_buffer_usage_get_threshold( |
| 546 | const struct lttng_condition *condition, |
| 547 | uint64_t *threshold_bytes) |
| 548 | { |
| 549 | struct lttng_condition_buffer_usage *usage; |
| 550 | enum lttng_condition_status status = LTTNG_CONDITION_STATUS_OK; |
| 551 | |
| 552 | if (!condition || !IS_USAGE_CONDITION(condition) || !threshold_bytes) { |
| 553 | status = LTTNG_CONDITION_STATUS_INVALID; |
| 554 | goto end; |
| 555 | } |
| 556 | |
| 557 | usage = container_of(condition, struct lttng_condition_buffer_usage, |
| 558 | parent); |
| 559 | if (!usage->threshold_bytes.set) { |
| 560 | status = LTTNG_CONDITION_STATUS_UNSET; |
| 561 | goto end; |
| 562 | } |
| 563 | *threshold_bytes = usage->threshold_bytes.value; |
| 564 | end: |
| 565 | return status; |
| 566 | } |
| 567 | |
| 568 | enum lttng_condition_status |
| 569 | lttng_condition_buffer_usage_set_threshold( |
| 570 | struct lttng_condition *condition, uint64_t threshold_bytes) |
| 571 | { |
| 572 | struct lttng_condition_buffer_usage *usage; |
| 573 | enum lttng_condition_status status = LTTNG_CONDITION_STATUS_OK; |
| 574 | |
| 575 | if (!condition || !IS_USAGE_CONDITION(condition)) { |
| 576 | status = LTTNG_CONDITION_STATUS_INVALID; |
| 577 | goto end; |
| 578 | } |
| 579 | |
| 580 | usage = container_of(condition, struct lttng_condition_buffer_usage, |
| 581 | parent); |
| 582 | usage->threshold_ratio.set = false; |
| 583 | usage->threshold_bytes.set = true; |
| 584 | usage->threshold_bytes.value = threshold_bytes; |
| 585 | end: |
| 586 | return status; |
| 587 | } |
| 588 | |
| 589 | enum lttng_condition_status |
| 590 | lttng_condition_buffer_usage_get_session_name( |
| 591 | const struct lttng_condition *condition, |
| 592 | const char **session_name) |
| 593 | { |
| 594 | struct lttng_condition_buffer_usage *usage; |
| 595 | enum lttng_condition_status status = LTTNG_CONDITION_STATUS_OK; |
| 596 | |
| 597 | if (!condition || !IS_USAGE_CONDITION(condition) || !session_name) { |
| 598 | status = LTTNG_CONDITION_STATUS_INVALID; |
| 599 | goto end; |
| 600 | } |
| 601 | |
| 602 | usage = container_of(condition, struct lttng_condition_buffer_usage, |
| 603 | parent); |
| 604 | if (!usage->session_name) { |
| 605 | status = LTTNG_CONDITION_STATUS_UNSET; |
| 606 | goto end; |
| 607 | } |
| 608 | *session_name = usage->session_name; |
| 609 | end: |
| 610 | return status; |
| 611 | } |
| 612 | |
| 613 | enum lttng_condition_status |
| 614 | lttng_condition_buffer_usage_set_session_name( |
| 615 | struct lttng_condition *condition, const char *session_name) |
| 616 | { |
| 617 | char *session_name_copy; |
| 618 | struct lttng_condition_buffer_usage *usage; |
| 619 | enum lttng_condition_status status = LTTNG_CONDITION_STATUS_OK; |
| 620 | |
| 621 | if (!condition || !IS_USAGE_CONDITION(condition) || !session_name || |
| 622 | strlen(session_name) == 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 | session_name_copy = strdup(session_name); |
| 630 | if (!session_name_copy) { |
| 631 | status = LTTNG_CONDITION_STATUS_ERROR; |
| 632 | goto end; |
| 633 | } |
| 634 | |
| 635 | if (usage->session_name) { |
| 636 | free(usage->session_name); |
| 637 | } |
| 638 | usage->session_name = session_name_copy; |
| 639 | end: |
| 640 | return status; |
| 641 | } |
| 642 | |
| 643 | enum lttng_condition_status |
| 644 | lttng_condition_buffer_usage_get_channel_name( |
| 645 | const struct lttng_condition *condition, |
| 646 | const char **channel_name) |
| 647 | { |
| 648 | struct lttng_condition_buffer_usage *usage; |
| 649 | enum lttng_condition_status status = LTTNG_CONDITION_STATUS_OK; |
| 650 | |
| 651 | if (!condition || !IS_USAGE_CONDITION(condition) || !channel_name) { |
| 652 | status = LTTNG_CONDITION_STATUS_INVALID; |
| 653 | goto end; |
| 654 | } |
| 655 | |
| 656 | usage = container_of(condition, struct lttng_condition_buffer_usage, |
| 657 | parent); |
| 658 | if (!usage->channel_name) { |
| 659 | status = LTTNG_CONDITION_STATUS_UNSET; |
| 660 | goto end; |
| 661 | } |
| 662 | *channel_name = usage->channel_name; |
| 663 | end: |
| 664 | return status; |
| 665 | } |
| 666 | |
| 667 | enum lttng_condition_status |
| 668 | lttng_condition_buffer_usage_set_channel_name( |
| 669 | struct lttng_condition *condition, const char *channel_name) |
| 670 | { |
| 671 | char *channel_name_copy; |
| 672 | struct lttng_condition_buffer_usage *usage; |
| 673 | enum lttng_condition_status status = LTTNG_CONDITION_STATUS_OK; |
| 674 | |
| 675 | if (!condition || !IS_USAGE_CONDITION(condition) || !channel_name || |
| 676 | strlen(channel_name) == 0) { |
| 677 | status = LTTNG_CONDITION_STATUS_INVALID; |
| 678 | goto end; |
| 679 | } |
| 680 | |
| 681 | usage = container_of(condition, struct lttng_condition_buffer_usage, |
| 682 | parent); |
| 683 | channel_name_copy = strdup(channel_name); |
| 684 | if (!channel_name_copy) { |
| 685 | status = LTTNG_CONDITION_STATUS_ERROR; |
| 686 | goto end; |
| 687 | } |
| 688 | |
| 689 | if (usage->channel_name) { |
| 690 | free(usage->channel_name); |
| 691 | } |
| 692 | usage->channel_name = channel_name_copy; |
| 693 | end: |
| 694 | return status; |
| 695 | } |
| 696 | |
| 697 | enum lttng_condition_status |
| 698 | lttng_condition_buffer_usage_get_domain_type( |
| 699 | const struct lttng_condition *condition, |
| 700 | enum lttng_domain_type *type) |
| 701 | { |
| 702 | struct lttng_condition_buffer_usage *usage; |
| 703 | enum lttng_condition_status status = LTTNG_CONDITION_STATUS_OK; |
| 704 | |
| 705 | if (!condition || !IS_USAGE_CONDITION(condition) || !type) { |
| 706 | status = LTTNG_CONDITION_STATUS_INVALID; |
| 707 | goto end; |
| 708 | } |
| 709 | |
| 710 | usage = container_of(condition, struct lttng_condition_buffer_usage, |
| 711 | parent); |
| 712 | if (!usage->domain.set) { |
| 713 | status = LTTNG_CONDITION_STATUS_UNSET; |
| 714 | goto end; |
| 715 | } |
| 716 | *type = usage->domain.type; |
| 717 | end: |
| 718 | return status; |
| 719 | } |
| 720 | |
| 721 | enum lttng_condition_status |
| 722 | lttng_condition_buffer_usage_set_domain_type( |
| 723 | struct lttng_condition *condition, enum lttng_domain_type type) |
| 724 | { |
| 725 | struct lttng_condition_buffer_usage *usage; |
| 726 | enum lttng_condition_status status = LTTNG_CONDITION_STATUS_OK; |
| 727 | |
| 728 | if (!condition || !IS_USAGE_CONDITION(condition) || |
| 729 | type == LTTNG_DOMAIN_NONE) { |
| 730 | status = LTTNG_CONDITION_STATUS_INVALID; |
| 731 | goto end; |
| 732 | } |
| 733 | |
| 734 | usage = container_of(condition, struct lttng_condition_buffer_usage, |
| 735 | parent); |
| 736 | usage->domain.set = true; |
| 737 | usage->domain.type = type; |
| 738 | end: |
| 739 | return status; |
| 740 | } |
| 741 | |
| 742 | static |
| 743 | ssize_t lttng_evaluation_buffer_usage_serialize( |
| 744 | struct lttng_evaluation *evaluation, char *buf) |
| 745 | { |
| 746 | ssize_t ret; |
| 747 | struct lttng_evaluation_buffer_usage *usage; |
| 748 | |
| 749 | usage = container_of(evaluation, struct lttng_evaluation_buffer_usage, |
| 750 | parent); |
| 751 | if (buf) { |
| 752 | struct lttng_evaluation_buffer_usage_comm comm = { |
| 753 | .buffer_use = usage->buffer_use, |
| 754 | .buffer_capacity = usage->buffer_capacity, |
| 755 | }; |
| 756 | |
| 757 | memcpy(buf, &comm, sizeof(comm)); |
| 758 | } |
| 759 | |
| 760 | ret = sizeof(struct lttng_evaluation_buffer_usage_comm); |
| 761 | return ret; |
| 762 | } |
| 763 | |
| 764 | static |
| 765 | void lttng_evaluation_buffer_usage_destroy( |
| 766 | struct lttng_evaluation *evaluation) |
| 767 | { |
| 768 | struct lttng_evaluation_buffer_usage *usage; |
| 769 | |
| 770 | usage = container_of(evaluation, struct lttng_evaluation_buffer_usage, |
| 771 | parent); |
| 772 | free(usage); |
| 773 | } |
| 774 | |
| 775 | LTTNG_HIDDEN |
| 776 | struct lttng_evaluation *lttng_evaluation_buffer_usage_create( |
| 777 | enum lttng_condition_type type, uint64_t use, uint64_t capacity) |
| 778 | { |
| 779 | struct lttng_evaluation_buffer_usage *usage; |
| 780 | |
| 781 | usage = zmalloc(sizeof(struct lttng_evaluation_buffer_usage)); |
| 782 | if (!usage) { |
| 783 | goto end; |
| 784 | } |
| 785 | |
| 786 | usage->parent.type = type; |
| 787 | usage->buffer_use = use; |
| 788 | usage->buffer_capacity = capacity; |
| 789 | usage->parent.serialize = lttng_evaluation_buffer_usage_serialize; |
| 790 | usage->parent.destroy = lttng_evaluation_buffer_usage_destroy; |
| 791 | end: |
| 792 | return &usage->parent; |
| 793 | } |
| 794 | |
| 795 | /* |
| 796 | * Get the sampled buffer usage which caused the associated condition to |
| 797 | * evaluate to "true". |
| 798 | */ |
| 799 | enum lttng_evaluation_status |
| 800 | lttng_evaluation_buffer_usage_get_usage_ratio( |
| 801 | const struct lttng_evaluation *evaluation, double *usage_ratio) |
| 802 | { |
| 803 | struct lttng_evaluation_buffer_usage *usage; |
| 804 | enum lttng_evaluation_status status = LTTNG_EVALUATION_STATUS_OK; |
| 805 | |
| 806 | if (!evaluation || !is_usage_evaluation(evaluation) || !usage_ratio) { |
| 807 | status = LTTNG_EVALUATION_STATUS_INVALID; |
| 808 | goto end; |
| 809 | } |
| 810 | |
| 811 | usage = container_of(evaluation, struct lttng_evaluation_buffer_usage, |
| 812 | parent); |
| 813 | *usage_ratio = (double) usage->buffer_use / |
| 814 | (double) usage->buffer_capacity; |
| 815 | end: |
| 816 | return status; |
| 817 | } |
| 818 | |
| 819 | enum lttng_evaluation_status |
| 820 | lttng_evaluation_buffer_usage_get_usage( |
| 821 | const struct lttng_evaluation *evaluation, |
| 822 | uint64_t *usage_bytes) |
| 823 | { |
| 824 | struct lttng_evaluation_buffer_usage *usage; |
| 825 | enum lttng_evaluation_status status = LTTNG_EVALUATION_STATUS_OK; |
| 826 | |
| 827 | if (!evaluation || !is_usage_evaluation(evaluation) || !usage_bytes) { |
| 828 | status = LTTNG_EVALUATION_STATUS_INVALID; |
| 829 | goto end; |
| 830 | } |
| 831 | |
| 832 | usage = container_of(evaluation, struct lttng_evaluation_buffer_usage, |
| 833 | parent); |
| 834 | *usage_bytes = usage->buffer_use; |
| 835 | end: |
| 836 | return status; |
| 837 | } |