| 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/session-consumed-size-internal.h> |
| 20 | #include <lttng/constant.h> |
| 21 | #include <common/macros.h> |
| 22 | #include <common/error.h> |
| 23 | #include <assert.h> |
| 24 | #include <math.h> |
| 25 | #include <float.h> |
| 26 | #include <time.h> |
| 27 | |
| 28 | #define IS_CONSUMED_SIZE_CONDITION(condition) ( \ |
| 29 | lttng_condition_get_type(condition) == LTTNG_CONDITION_TYPE_SESSION_CONSUMED_SIZE \ |
| 30 | ) |
| 31 | |
| 32 | #define IS_CONSUMED_SIZE_EVALUATION(evaluation) ( \ |
| 33 | lttng_evaluation_get_type(evaluation) == LTTNG_CONDITION_TYPE_SESSION_CONSUMED_SIZE \ |
| 34 | ) |
| 35 | |
| 36 | static |
| 37 | void lttng_condition_session_consumed_size_destroy(struct lttng_condition *condition) |
| 38 | { |
| 39 | struct lttng_condition_session_consumed_size *consumed_size; |
| 40 | |
| 41 | consumed_size = container_of(condition, |
| 42 | struct lttng_condition_session_consumed_size, parent); |
| 43 | |
| 44 | free(consumed_size->session_name); |
| 45 | free(consumed_size); |
| 46 | } |
| 47 | |
| 48 | static |
| 49 | bool lttng_condition_session_consumed_size_validate( |
| 50 | const struct lttng_condition *condition) |
| 51 | { |
| 52 | bool valid = false; |
| 53 | struct lttng_condition_session_consumed_size *consumed; |
| 54 | |
| 55 | if (!condition) { |
| 56 | goto end; |
| 57 | } |
| 58 | |
| 59 | consumed = container_of(condition, struct lttng_condition_session_consumed_size, |
| 60 | parent); |
| 61 | if (!consumed->session_name) { |
| 62 | ERR("Invalid buffer condition: a target session name must be set."); |
| 63 | goto end; |
| 64 | } |
| 65 | if (!consumed->consumed_threshold_bytes.set) { |
| 66 | ERR("Invalid session condition: a threshold must be set."); |
| 67 | goto end; |
| 68 | } |
| 69 | |
| 70 | valid = true; |
| 71 | end: |
| 72 | return valid; |
| 73 | } |
| 74 | |
| 75 | static |
| 76 | ssize_t lttng_condition_session_consumed_size_serialize( |
| 77 | const struct lttng_condition *condition, char *buf) |
| 78 | { |
| 79 | struct lttng_condition_session_consumed_size *consumed; |
| 80 | ssize_t ret, size; |
| 81 | size_t session_name_len; |
| 82 | |
| 83 | if (!condition || !IS_CONSUMED_SIZE_CONDITION(condition)) { |
| 84 | ret = -1; |
| 85 | goto end; |
| 86 | } |
| 87 | |
| 88 | DBG("Serializing session consumed condition"); |
| 89 | consumed = container_of(condition, struct lttng_condition_session_consumed_size, |
| 90 | parent); |
| 91 | size = sizeof(struct lttng_condition_session_consumed_size_comm); |
| 92 | session_name_len = strlen(consumed->session_name) + 1; |
| 93 | if (session_name_len > LTTNG_NAME_MAX) { |
| 94 | ret = -1; |
| 95 | goto end; |
| 96 | } |
| 97 | size += session_name_len; |
| 98 | if (buf) { |
| 99 | struct lttng_condition_session_consumed_size_comm consumed_comm = { |
| 100 | .consumed_threshold_bytes = consumed->consumed_threshold_bytes.value, |
| 101 | .session_name_len = session_name_len, |
| 102 | }; |
| 103 | |
| 104 | memcpy(buf, &consumed_comm, sizeof(consumed_comm)); |
| 105 | buf += sizeof(consumed_comm); |
| 106 | memcpy(buf, consumed->session_name, session_name_len); |
| 107 | buf += session_name_len; |
| 108 | } |
| 109 | ret = size; |
| 110 | end: |
| 111 | return ret; |
| 112 | } |
| 113 | |
| 114 | static |
| 115 | bool lttng_condition_session_consumed_size_is_equal(const struct lttng_condition *_a, |
| 116 | const struct lttng_condition *_b) |
| 117 | { |
| 118 | bool is_equal = false; |
| 119 | struct lttng_condition_session_consumed_size *a, *b; |
| 120 | |
| 121 | a = container_of(_a, struct lttng_condition_session_consumed_size, parent); |
| 122 | b = container_of(_b, struct lttng_condition_session_consumed_size, parent); |
| 123 | |
| 124 | if (a->consumed_threshold_bytes.set && b->consumed_threshold_bytes.set) { |
| 125 | uint64_t a_value, b_value; |
| 126 | |
| 127 | a_value = a->consumed_threshold_bytes.value; |
| 128 | b_value = b->consumed_threshold_bytes.value; |
| 129 | if (a_value != b_value) { |
| 130 | goto end; |
| 131 | } |
| 132 | } |
| 133 | |
| 134 | if ((a->session_name && !b->session_name) || |
| 135 | (!a->session_name && b->session_name)) { |
| 136 | goto end; |
| 137 | } |
| 138 | |
| 139 | is_equal = true; |
| 140 | end: |
| 141 | return is_equal; |
| 142 | } |
| 143 | |
| 144 | struct lttng_condition *lttng_condition_session_consumed_size_create(void) |
| 145 | { |
| 146 | struct lttng_condition_session_consumed_size *condition; |
| 147 | |
| 148 | condition = zmalloc(sizeof(struct lttng_condition_session_consumed_size)); |
| 149 | if (!condition) { |
| 150 | return NULL; |
| 151 | } |
| 152 | |
| 153 | lttng_condition_init(&condition->parent, LTTNG_CONDITION_TYPE_SESSION_CONSUMED_SIZE); |
| 154 | condition->parent.validate = lttng_condition_session_consumed_size_validate; |
| 155 | condition->parent.serialize = lttng_condition_session_consumed_size_serialize; |
| 156 | condition->parent.equal = lttng_condition_session_consumed_size_is_equal; |
| 157 | condition->parent.destroy = lttng_condition_session_consumed_size_destroy; |
| 158 | return &condition->parent; |
| 159 | } |
| 160 | |
| 161 | static |
| 162 | ssize_t init_condition_from_buffer(struct lttng_condition *condition, |
| 163 | const struct lttng_buffer_view *src_view) |
| 164 | { |
| 165 | ssize_t ret, condition_size; |
| 166 | enum lttng_condition_status status; |
| 167 | const struct lttng_condition_session_consumed_size_comm *condition_comm; |
| 168 | const char *session_name; |
| 169 | struct lttng_buffer_view names_view; |
| 170 | |
| 171 | if (src_view->size < sizeof(*condition_comm)) { |
| 172 | ERR("Failed to initialize from malformed condition buffer: buffer too short to contain header"); |
| 173 | ret = -1; |
| 174 | goto end; |
| 175 | } |
| 176 | |
| 177 | condition_comm = (const struct lttng_condition_session_consumed_size_comm *) src_view->data; |
| 178 | names_view = lttng_buffer_view_from_view(src_view, |
| 179 | sizeof(*condition_comm), -1); |
| 180 | |
| 181 | if (condition_comm->session_name_len > LTTNG_NAME_MAX) { |
| 182 | ERR("Failed to initialize from malformed condition buffer: name exceeds LTTNG_MAX_NAME"); |
| 183 | ret = -1; |
| 184 | goto end; |
| 185 | } |
| 186 | |
| 187 | if (names_view.size < condition_comm->session_name_len) { |
| 188 | ERR("Failed to initialize from malformed condition buffer: buffer too short to contain element names"); |
| 189 | ret = -1; |
| 190 | goto end; |
| 191 | } |
| 192 | |
| 193 | status = lttng_condition_session_consumed_size_set_threshold(condition, |
| 194 | condition_comm->consumed_threshold_bytes); |
| 195 | if (status != LTTNG_CONDITION_STATUS_OK) { |
| 196 | ERR("Failed to initialize session consumed condition threshold"); |
| 197 | ret = -1; |
| 198 | goto end; |
| 199 | } |
| 200 | |
| 201 | session_name = names_view.data; |
| 202 | if (*(session_name + condition_comm->session_name_len - 1) != '\0') { |
| 203 | ERR("Malformed session name encountered in condition buffer"); |
| 204 | ret = -1; |
| 205 | goto end; |
| 206 | } |
| 207 | |
| 208 | status = lttng_condition_session_consumed_size_set_session_name(condition, |
| 209 | session_name); |
| 210 | if (status != LTTNG_CONDITION_STATUS_OK) { |
| 211 | ERR("Failed to set buffer consumed session name"); |
| 212 | ret = -1; |
| 213 | goto end; |
| 214 | } |
| 215 | |
| 216 | if (!lttng_condition_validate(condition)) { |
| 217 | ret = -1; |
| 218 | goto end; |
| 219 | } |
| 220 | |
| 221 | condition_size = sizeof(*condition_comm) + |
| 222 | (ssize_t) condition_comm->session_name_len; |
| 223 | ret = condition_size; |
| 224 | end: |
| 225 | return ret; |
| 226 | } |
| 227 | |
| 228 | LTTNG_HIDDEN |
| 229 | ssize_t lttng_condition_session_consumed_size_create_from_buffer( |
| 230 | const struct lttng_buffer_view *view, |
| 231 | struct lttng_condition **_condition) |
| 232 | { |
| 233 | ssize_t ret; |
| 234 | struct lttng_condition *condition = |
| 235 | lttng_condition_session_consumed_size_create(); |
| 236 | |
| 237 | if (!_condition || !condition) { |
| 238 | ret = -1; |
| 239 | goto error; |
| 240 | } |
| 241 | |
| 242 | ret = init_condition_from_buffer(condition, view); |
| 243 | if (ret < 0) { |
| 244 | goto error; |
| 245 | } |
| 246 | |
| 247 | *_condition = condition; |
| 248 | return ret; |
| 249 | error: |
| 250 | lttng_condition_destroy(condition); |
| 251 | return ret; |
| 252 | } |
| 253 | |
| 254 | static |
| 255 | struct lttng_evaluation *create_evaluation_from_buffer( |
| 256 | enum lttng_condition_type type, |
| 257 | const struct lttng_buffer_view *view) |
| 258 | { |
| 259 | const struct lttng_evaluation_session_consumed_size_comm *comm = |
| 260 | (const struct lttng_evaluation_session_consumed_size_comm *) view->data; |
| 261 | struct lttng_evaluation *evaluation = NULL; |
| 262 | |
| 263 | if (view->size < sizeof(*comm)) { |
| 264 | goto end; |
| 265 | } |
| 266 | |
| 267 | evaluation = lttng_evaluation_session_consumed_size_create(type, |
| 268 | comm->session_consumed); |
| 269 | end: |
| 270 | return evaluation; |
| 271 | } |
| 272 | |
| 273 | LTTNG_HIDDEN |
| 274 | ssize_t lttng_evaluation_session_consumed_size_create_from_buffer( |
| 275 | const struct lttng_buffer_view *view, |
| 276 | struct lttng_evaluation **_evaluation) |
| 277 | { |
| 278 | ssize_t ret; |
| 279 | struct lttng_evaluation *evaluation = NULL; |
| 280 | |
| 281 | if (!_evaluation) { |
| 282 | ret = -1; |
| 283 | goto error; |
| 284 | } |
| 285 | |
| 286 | evaluation = create_evaluation_from_buffer( |
| 287 | LTTNG_CONDITION_TYPE_SESSION_CONSUMED_SIZE, view); |
| 288 | if (!evaluation) { |
| 289 | ret = -1; |
| 290 | goto error; |
| 291 | } |
| 292 | |
| 293 | *_evaluation = evaluation; |
| 294 | ret = sizeof(struct lttng_evaluation_session_consumed_size_comm); |
| 295 | return ret; |
| 296 | error: |
| 297 | lttng_evaluation_destroy(evaluation); |
| 298 | return ret; |
| 299 | } |
| 300 | |
| 301 | enum lttng_condition_status |
| 302 | lttng_condition_session_consumed_size_get_threshold( |
| 303 | const struct lttng_condition *condition, |
| 304 | uint64_t *consumed_threshold_bytes) |
| 305 | { |
| 306 | struct lttng_condition_session_consumed_size *consumed; |
| 307 | enum lttng_condition_status status = LTTNG_CONDITION_STATUS_OK; |
| 308 | |
| 309 | if (!condition || !IS_CONSUMED_SIZE_CONDITION(condition) || !consumed_threshold_bytes) { |
| 310 | status = LTTNG_CONDITION_STATUS_INVALID; |
| 311 | goto end; |
| 312 | } |
| 313 | |
| 314 | consumed = container_of(condition, struct lttng_condition_session_consumed_size, |
| 315 | parent); |
| 316 | if (!consumed->consumed_threshold_bytes.set) { |
| 317 | status = LTTNG_CONDITION_STATUS_UNSET; |
| 318 | goto end; |
| 319 | } |
| 320 | *consumed_threshold_bytes = consumed->consumed_threshold_bytes.value; |
| 321 | end: |
| 322 | return status; |
| 323 | } |
| 324 | |
| 325 | enum lttng_condition_status |
| 326 | lttng_condition_session_consumed_size_set_threshold( |
| 327 | struct lttng_condition *condition, uint64_t consumed_threshold_bytes) |
| 328 | { |
| 329 | struct lttng_condition_session_consumed_size *consumed; |
| 330 | enum lttng_condition_status status = LTTNG_CONDITION_STATUS_OK; |
| 331 | |
| 332 | if (!condition || !IS_CONSUMED_SIZE_CONDITION(condition)) { |
| 333 | status = LTTNG_CONDITION_STATUS_INVALID; |
| 334 | goto end; |
| 335 | } |
| 336 | |
| 337 | consumed = container_of(condition, struct lttng_condition_session_consumed_size, |
| 338 | parent); |
| 339 | consumed->consumed_threshold_bytes.set = true; |
| 340 | consumed->consumed_threshold_bytes.value = consumed_threshold_bytes; |
| 341 | end: |
| 342 | return status; |
| 343 | } |
| 344 | |
| 345 | enum lttng_condition_status |
| 346 | lttng_condition_session_consumed_size_get_session_name( |
| 347 | const struct lttng_condition *condition, |
| 348 | const char **session_name) |
| 349 | { |
| 350 | struct lttng_condition_session_consumed_size *consumed; |
| 351 | enum lttng_condition_status status = LTTNG_CONDITION_STATUS_OK; |
| 352 | |
| 353 | if (!condition || !IS_CONSUMED_SIZE_CONDITION(condition) || !session_name) { |
| 354 | status = LTTNG_CONDITION_STATUS_INVALID; |
| 355 | goto end; |
| 356 | } |
| 357 | |
| 358 | consumed = container_of(condition, struct lttng_condition_session_consumed_size, |
| 359 | parent); |
| 360 | if (!consumed->session_name) { |
| 361 | status = LTTNG_CONDITION_STATUS_UNSET; |
| 362 | goto end; |
| 363 | } |
| 364 | *session_name = consumed->session_name; |
| 365 | end: |
| 366 | return status; |
| 367 | } |
| 368 | |
| 369 | enum lttng_condition_status |
| 370 | lttng_condition_session_consumed_size_set_session_name( |
| 371 | struct lttng_condition *condition, const char *session_name) |
| 372 | { |
| 373 | char *session_name_copy; |
| 374 | struct lttng_condition_session_consumed_size *consumed; |
| 375 | enum lttng_condition_status status = LTTNG_CONDITION_STATUS_OK; |
| 376 | |
| 377 | if (!condition || !IS_CONSUMED_SIZE_CONDITION(condition) || |
| 378 | !session_name || strlen(session_name) == 0) { |
| 379 | status = LTTNG_CONDITION_STATUS_INVALID; |
| 380 | goto end; |
| 381 | } |
| 382 | |
| 383 | consumed = container_of(condition, struct lttng_condition_session_consumed_size, |
| 384 | parent); |
| 385 | session_name_copy = strdup(session_name); |
| 386 | if (!session_name_copy) { |
| 387 | status = LTTNG_CONDITION_STATUS_ERROR; |
| 388 | goto end; |
| 389 | } |
| 390 | |
| 391 | if (consumed->session_name) { |
| 392 | free(consumed->session_name); |
| 393 | } |
| 394 | consumed->session_name = session_name_copy; |
| 395 | end: |
| 396 | return status; |
| 397 | } |
| 398 | |
| 399 | static |
| 400 | ssize_t lttng_evaluation_session_consumed_size_serialize( |
| 401 | struct lttng_evaluation *evaluation, char *buf) |
| 402 | { |
| 403 | ssize_t ret; |
| 404 | struct lttng_evaluation_session_consumed_size *consumed; |
| 405 | |
| 406 | consumed = container_of(evaluation, struct lttng_evaluation_session_consumed_size, |
| 407 | parent); |
| 408 | if (buf) { |
| 409 | struct lttng_evaluation_session_consumed_size_comm comm = { |
| 410 | .session_consumed = consumed->session_consumed, |
| 411 | }; |
| 412 | |
| 413 | memcpy(buf, &comm, sizeof(comm)); |
| 414 | } |
| 415 | |
| 416 | ret = sizeof(struct lttng_evaluation_session_consumed_size_comm); |
| 417 | return ret; |
| 418 | } |
| 419 | |
| 420 | static |
| 421 | void lttng_evaluation_session_consumed_size_destroy( |
| 422 | struct lttng_evaluation *evaluation) |
| 423 | { |
| 424 | struct lttng_evaluation_session_consumed_size *consumed; |
| 425 | |
| 426 | consumed = container_of(evaluation, struct lttng_evaluation_session_consumed_size, |
| 427 | parent); |
| 428 | free(consumed); |
| 429 | } |
| 430 | |
| 431 | LTTNG_HIDDEN |
| 432 | struct lttng_evaluation *lttng_evaluation_session_consumed_size_create( |
| 433 | enum lttng_condition_type type, uint64_t consumed) |
| 434 | { |
| 435 | struct lttng_evaluation_session_consumed_size *consumed_eval; |
| 436 | |
| 437 | consumed_eval = zmalloc(sizeof(struct lttng_evaluation_session_consumed_size)); |
| 438 | if (!consumed_eval) { |
| 439 | goto end; |
| 440 | } |
| 441 | |
| 442 | consumed_eval->parent.type = type; |
| 443 | consumed_eval->session_consumed = consumed; |
| 444 | consumed_eval->parent.serialize = lttng_evaluation_session_consumed_size_serialize; |
| 445 | consumed_eval->parent.destroy = lttng_evaluation_session_consumed_size_destroy; |
| 446 | end: |
| 447 | return &consumed_eval->parent; |
| 448 | } |
| 449 | |
| 450 | enum lttng_evaluation_status |
| 451 | lttng_evaluation_session_consumed_size_get_consumed_size( |
| 452 | const struct lttng_evaluation *evaluation, |
| 453 | uint64_t *session_consumed) |
| 454 | { |
| 455 | struct lttng_evaluation_session_consumed_size *consumed; |
| 456 | enum lttng_evaluation_status status = LTTNG_EVALUATION_STATUS_OK; |
| 457 | |
| 458 | if (!evaluation || !IS_CONSUMED_SIZE_EVALUATION(evaluation) || |
| 459 | !session_consumed) { |
| 460 | status = LTTNG_EVALUATION_STATUS_INVALID; |
| 461 | goto end; |
| 462 | } |
| 463 | |
| 464 | consumed = container_of(evaluation, struct lttng_evaluation_session_consumed_size, |
| 465 | parent); |
| 466 | *session_consumed = consumed->session_consumed; |
| 467 | end: |
| 468 | return status; |
| 469 | } |