src/common/conditions/session-consumed-size.cpp

   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.hpp>
   9 #include <common/macros.hpp>
  10 #include <common/mi-lttng.hpp>
  11 #include <float.h>
  12 #include <lttng/condition/condition-internal.hpp>
  13 #include <lttng/condition/session-consumed-size-internal.hpp>
  14 #include <lttng/constant.h>
  15 #include <math.h>
  16 #include <time.h>
  17
  18 #define IS_CONSUMED_SIZE_CONDITION(condition) ( \
  19         lttng_condition_get_type(condition) == LTTNG_CONDITION_TYPE_SESSION_CONSUMED_SIZE \
  20         )
  21
  22 #define IS_CONSUMED_SIZE_EVALUATION(evaluation) ( \
  23         lttng_evaluation_get_type(evaluation) == LTTNG_CONDITION_TYPE_SESSION_CONSUMED_SIZE \
  24         )
  25
  26 static
  27 void lttng_condition_session_consumed_size_destroy(struct lttng_condition *condition)
  28 {
  29         struct lttng_condition_session_consumed_size *consumed_size;
  30
  31         consumed_size = container_of(condition,
  32                         struct lttng_condition_session_consumed_size, parent);
  33
  34         free(consumed_size->session_name);
  35         free(consumed_size);
  36 }
  37
  38 static
  39 bool lttng_condition_session_consumed_size_validate(
  40                 const struct lttng_condition *condition)
  41 {
  42         bool valid = false;
  43         struct lttng_condition_session_consumed_size *consumed;
  44
  45         if (!condition) {
  46                 goto end;
  47         }
  48
  49         consumed = container_of(condition, struct lttng_condition_session_consumed_size,
  50                         parent);
  51         if (!consumed->session_name) {
  52                 ERR("Invalid session consumed size condition: a target session name must be set.");
  53                 goto end;
  54         }
  55         if (!consumed->consumed_threshold_bytes.set) {
  56                 ERR("Invalid session consumed size condition: a threshold must be set.");
  57                 goto end;
  58         }
  59
  60         valid = true;
  61 end:
  62         return valid;
  63 }
  64
  65 static
  66 int lttng_condition_session_consumed_size_serialize(
  67                 const struct lttng_condition *condition,
  68                 struct lttng_payload *payload)
  69 {
  70         int ret;
  71         size_t session_name_len;
  72         struct lttng_condition_session_consumed_size *consumed;
  73         struct lttng_condition_session_consumed_size_comm consumed_comm;
  74
  75         if (!condition || !IS_CONSUMED_SIZE_CONDITION(condition)) {
  76                 ret = -1;
  77                 goto end;
  78         }
  79
  80         DBG("Serializing session consumed size condition");
  81         consumed = container_of(condition,
  82                         struct lttng_condition_session_consumed_size,
  83                         parent);
  84
  85         session_name_len = strlen(consumed->session_name) + 1;
  86         if (session_name_len > LTTNG_NAME_MAX) {
  87                 ret = -1;
  88                 goto end;
  89         }
  90
  91         consumed_comm.consumed_threshold_bytes =
  92                         consumed->consumed_threshold_bytes.value;
  93         consumed_comm.session_name_len = (uint32_t) session_name_len;
  94
  95         ret = lttng_dynamic_buffer_append(&payload->buffer, &consumed_comm,
  96                         sizeof(consumed_comm));
  97         if (ret) {
  98                 goto end;
  99         }
 100
 101         ret = lttng_dynamic_buffer_append(&payload->buffer, consumed->session_name,
 102                         session_name_len);
 103         if (ret) {
 104                 goto end;
 105         }
 106 end:
 107         return ret;
 108 }
 109
 110 static
 111 bool lttng_condition_session_consumed_size_is_equal(const struct lttng_condition *_a,
 112                 const struct lttng_condition *_b)
 113 {
 114         bool is_equal = false;
 115         struct lttng_condition_session_consumed_size *a, *b;
 116
 117         a = container_of(_a, struct lttng_condition_session_consumed_size, parent);
 118         b = container_of(_b, struct lttng_condition_session_consumed_size, parent);
 119
 120         if (a->consumed_threshold_bytes.set && b->consumed_threshold_bytes.set) {
 121                 uint64_t a_value, b_value;
 122
 123                 a_value = a->consumed_threshold_bytes.value;
 124                 b_value = b->consumed_threshold_bytes.value;
 125                 if (a_value != b_value) {
 126                         goto end;
 127                 }
 128         }
 129
 130         LTTNG_ASSERT(a->session_name);
 131         LTTNG_ASSERT(b->session_name);
 132         if (strcmp(a->session_name, b->session_name)) {
 133                 goto end;
 134         }
 135
 136         is_equal = true;
 137 end:
 138         return is_equal;
 139 }
 140
 141 static
 142 enum lttng_error_code lttng_condition_session_consumed_size_mi_serialize(
 143                 const struct lttng_condition *condition,
 144                 struct mi_writer *writer)
 145 {
 146         int ret;
 147         enum lttng_error_code ret_code;
 148         enum lttng_condition_status status;
 149         const char *session_name = NULL;
 150         uint64_t threshold_bytes;
 151
 152         LTTNG_ASSERT(condition);
 153         LTTNG_ASSERT(writer);
 154         LTTNG_ASSERT(IS_CONSUMED_SIZE_CONDITION(condition));
 155
 156         status = lttng_condition_session_consumed_size_get_session_name(
 157                         condition, &session_name);
 158         LTTNG_ASSERT(status == LTTNG_CONDITION_STATUS_OK);
 159         LTTNG_ASSERT(session_name);
 160
 161         status = lttng_condition_session_consumed_size_get_threshold(
 162                         condition, &threshold_bytes);
 163         LTTNG_ASSERT(status == LTTNG_CONDITION_STATUS_OK);
 164
 165         /* Open condition session consumed size element. */
 166         ret = mi_lttng_writer_open_element(writer,
 167                         mi_lttng_element_condition_session_consumed_size);
 168         if (ret) {
 169                 goto mi_error;
 170         }
 171
 172         /* Session name. */
 173         ret = mi_lttng_writer_write_element_string(
 174                         writer, mi_lttng_element_session_name, session_name);
 175         if (ret) {
 176                 goto mi_error;
 177         }
 178
 179         /* Threshold in bytes. */
 180         ret = mi_lttng_writer_write_element_unsigned_int(writer,
 181                         mi_lttng_element_condition_threshold_bytes,
 182                         threshold_bytes);
 183         if (ret) {
 184                 goto mi_error;
 185         }
 186
 187         /* Close condition session consumed size element. */
 188         ret = mi_lttng_writer_close_element(writer);
 189         if (ret) {
 190                 goto mi_error;
 191         }
 192
 193         ret_code = LTTNG_OK;
 194         goto end;
 195
 196 mi_error:
 197         ret_code = LTTNG_ERR_MI_IO_FAIL;
 198 end:
 199         return ret_code;
 200 }
 201
 202 struct lttng_condition *lttng_condition_session_consumed_size_create(void)
 203 {
 204         struct lttng_condition_session_consumed_size *condition;
 205
 206         condition = zmalloc<lttng_condition_session_consumed_size>();
 207         if (!condition) {
 208                 return NULL;
 209         }
 210
 211         lttng_condition_init(&condition->parent, LTTNG_CONDITION_TYPE_SESSION_CONSUMED_SIZE);
 212         condition->parent.validate = lttng_condition_session_consumed_size_validate;
 213         condition->parent.serialize = lttng_condition_session_consumed_size_serialize;
 214         condition->parent.equal = lttng_condition_session_consumed_size_is_equal;
 215         condition->parent.destroy = lttng_condition_session_consumed_size_destroy;
 216         condition->parent.mi_serialize = lttng_condition_session_consumed_size_mi_serialize;
 217         return &condition->parent;
 218 }
 219
 220 static
 221 ssize_t init_condition_from_payload(struct lttng_condition *condition,
 222                 struct lttng_payload_view *src_view)
 223 {
 224         ssize_t ret, condition_size;
 225         enum lttng_condition_status status;
 226         const char *session_name;
 227         struct lttng_buffer_view session_name_view;
 228         const struct lttng_condition_session_consumed_size_comm *condition_comm;
 229         struct lttng_payload_view condition_comm_view = lttng_payload_view_from_view(
 230                         src_view, 0, sizeof(*condition_comm));
 231
 232         if (!lttng_payload_view_is_valid(&condition_comm_view)) {
 233                 ERR("Failed to initialize from malformed condition buffer: buffer too short to contain header");
 234                 ret = -1;
 235                 goto end;
 236         }
 237
 238         condition_comm = (typeof(condition_comm)) condition_comm_view.buffer.data;
 239         session_name_view = lttng_buffer_view_from_view(&src_view->buffer,
 240                         sizeof(*condition_comm), condition_comm->session_name_len);
 241
 242         if (condition_comm->session_name_len > LTTNG_NAME_MAX) {
 243                 ERR("Failed to initialize from malformed condition buffer: name exceeds LTTNG_MAX_NAME");
 244                 ret = -1;
 245                 goto end;
 246         }
 247
 248         if (!lttng_buffer_view_is_valid(&session_name_view)) {
 249                 ERR("Failed to initialize from malformed condition buffer: buffer too short to contain element names");
 250                 ret = -1;
 251                 goto end;
 252         }
 253
 254         status = lttng_condition_session_consumed_size_set_threshold(condition,
 255                         condition_comm->consumed_threshold_bytes);
 256         if (status != LTTNG_CONDITION_STATUS_OK) {
 257                 ERR("Failed to initialize session consumed size condition threshold");
 258                 ret = -1;
 259                 goto end;
 260         }
 261
 262         session_name = session_name_view.data;
 263         if (*(session_name + condition_comm->session_name_len - 1) != '\0') {
 264                 ERR("Malformed session name encountered in condition buffer");
 265                 ret = -1;
 266                 goto end;
 267         }
 268
 269         status = lttng_condition_session_consumed_size_set_session_name(condition,
 270                         session_name);
 271         if (status != LTTNG_CONDITION_STATUS_OK) {
 272                 ERR("Failed to set session consumed size condition's session name");
 273                 ret = -1;
 274                 goto end;
 275         }
 276
 277         if (!lttng_condition_validate(condition)) {
 278                 ret = -1;
 279                 goto end;
 280         }
 281
 282         condition_size = sizeof(*condition_comm) +
 283                         (ssize_t) condition_comm->session_name_len;
 284         ret = condition_size;
 285 end:
 286         return ret;
 287 }
 288
 289 ssize_t lttng_condition_session_consumed_size_create_from_payload(
 290                 struct lttng_payload_view *view,
 291                 struct lttng_condition **_condition)
 292 {
 293         ssize_t ret;
 294         struct lttng_condition *condition =
 295                         lttng_condition_session_consumed_size_create();
 296
 297         if (!_condition || !condition) {
 298                 ret = -1;
 299                 goto error;
 300         }
 301
 302         ret = init_condition_from_payload(condition, view);
 303         if (ret < 0) {
 304                 goto error;
 305         }
 306
 307         *_condition = condition;
 308         return ret;
 309 error:
 310         lttng_condition_destroy(condition);
 311         return ret;
 312 }
 313
 314 static
 315 struct lttng_evaluation *create_evaluation_from_payload(
 316                 const struct lttng_payload_view *view)
 317 {
 318         const struct lttng_evaluation_session_consumed_size_comm *comm =
 319                         (typeof(comm)) view->buffer.data;
 320         struct lttng_evaluation *evaluation = NULL;
 321
 322         if (view->buffer.size < sizeof(*comm)) {
 323                 goto end;
 324         }
 325
 326         evaluation = lttng_evaluation_session_consumed_size_create(
 327                         comm->session_consumed);
 328 end:
 329         return evaluation;
 330 }
 331
 332 ssize_t lttng_evaluation_session_consumed_size_create_from_payload(
 333                 struct lttng_payload_view *view,
 334                 struct lttng_evaluation **_evaluation)
 335 {
 336         ssize_t ret;
 337         struct lttng_evaluation *evaluation = NULL;
 338
 339         if (!_evaluation) {
 340                 ret = -1;
 341                 goto error;
 342         }
 343
 344         evaluation = create_evaluation_from_payload(view);
 345         if (!evaluation) {
 346                 ret = -1;
 347                 goto error;
 348         }
 349
 350         *_evaluation = evaluation;
 351         ret = sizeof(struct lttng_evaluation_session_consumed_size_comm);
 352         return ret;
 353 error:
 354         lttng_evaluation_destroy(evaluation);
 355         return ret;
 356 }
 357
 358 enum lttng_condition_status
 359 lttng_condition_session_consumed_size_get_threshold(
 360                 const struct lttng_condition *condition,
 361                 uint64_t *consumed_threshold_bytes)
 362 {
 363         struct lttng_condition_session_consumed_size *consumed;
 364         enum lttng_condition_status status = LTTNG_CONDITION_STATUS_OK;
 365
 366         if (!condition || !IS_CONSUMED_SIZE_CONDITION(condition) || !consumed_threshold_bytes) {
 367                 status = LTTNG_CONDITION_STATUS_INVALID;
 368                 goto end;
 369         }
 370
 371         consumed = container_of(condition, struct lttng_condition_session_consumed_size,
 372                         parent);
 373         if (!consumed->consumed_threshold_bytes.set) {
 374                 status = LTTNG_CONDITION_STATUS_UNSET;
 375                 goto end;
 376         }
 377         *consumed_threshold_bytes = consumed->consumed_threshold_bytes.value;
 378 end:
 379         return status;
 380 }
 381
 382 enum lttng_condition_status
 383 lttng_condition_session_consumed_size_set_threshold(
 384                 struct lttng_condition *condition, uint64_t consumed_threshold_bytes)
 385 {
 386         struct lttng_condition_session_consumed_size *consumed;
 387         enum lttng_condition_status status = LTTNG_CONDITION_STATUS_OK;
 388
 389         if (!condition || !IS_CONSUMED_SIZE_CONDITION(condition)) {
 390                 status = LTTNG_CONDITION_STATUS_INVALID;
 391                 goto end;
 392         }
 393
 394         consumed = container_of(condition, struct lttng_condition_session_consumed_size,
 395                         parent);
 396         consumed->consumed_threshold_bytes.set = true;
 397         consumed->consumed_threshold_bytes.value = consumed_threshold_bytes;
 398 end:
 399         return status;
 400 }
 401
 402 enum lttng_condition_status
 403 lttng_condition_session_consumed_size_get_session_name(
 404                 const struct lttng_condition *condition,
 405                 const char **session_name)
 406 {
 407         struct lttng_condition_session_consumed_size *consumed;
 408         enum lttng_condition_status status = LTTNG_CONDITION_STATUS_OK;
 409
 410         if (!condition || !IS_CONSUMED_SIZE_CONDITION(condition) || !session_name) {
 411                 status = LTTNG_CONDITION_STATUS_INVALID;
 412                 goto end;
 413         }
 414
 415         consumed = container_of(condition, struct lttng_condition_session_consumed_size,
 416                         parent);
 417         if (!consumed->session_name) {
 418                 status = LTTNG_CONDITION_STATUS_UNSET;
 419                 goto end;
 420         }
 421         *session_name = consumed->session_name;
 422 end:
 423         return status;
 424 }
 425
 426 enum lttng_condition_status
 427 lttng_condition_session_consumed_size_set_session_name(
 428                 struct lttng_condition *condition, const char *session_name)
 429 {
 430         char *session_name_copy;
 431         struct lttng_condition_session_consumed_size *consumed;
 432         enum lttng_condition_status status = LTTNG_CONDITION_STATUS_OK;
 433
 434         if (!condition || !IS_CONSUMED_SIZE_CONDITION(condition) ||
 435                         !session_name || strlen(session_name) == 0) {
 436                 status = LTTNG_CONDITION_STATUS_INVALID;
 437                 goto end;
 438         }
 439
 440         consumed = container_of(condition, struct lttng_condition_session_consumed_size,
 441                         parent);
 442         session_name_copy = strdup(session_name);
 443         if (!session_name_copy) {
 444                 status = LTTNG_CONDITION_STATUS_ERROR;
 445                 goto end;
 446         }
 447
 448         if (consumed->session_name) {
 449                 free(consumed->session_name);
 450         }
 451         consumed->session_name = session_name_copy;
 452 end:
 453         return status;
 454 }
 455
 456 static
 457 int lttng_evaluation_session_consumed_size_serialize(
 458                 const struct lttng_evaluation *evaluation,
 459                 struct lttng_payload *payload)
 460 {
 461         struct lttng_evaluation_session_consumed_size *consumed;
 462         struct lttng_evaluation_session_consumed_size_comm comm;
 463
 464         consumed = container_of(evaluation,
 465                         struct lttng_evaluation_session_consumed_size, parent);
 466         comm.session_consumed = consumed->session_consumed;
 467         return lttng_dynamic_buffer_append(
 468                         &payload->buffer, &comm, sizeof(comm));
 469 }
 470
 471 static
 472 void lttng_evaluation_session_consumed_size_destroy(
 473                 struct lttng_evaluation *evaluation)
 474 {
 475         struct lttng_evaluation_session_consumed_size *consumed;
 476
 477         consumed = container_of(evaluation, struct lttng_evaluation_session_consumed_size,
 478                         parent);
 479         free(consumed);
 480 }
 481
 482 struct lttng_evaluation *lttng_evaluation_session_consumed_size_create(
 483                 uint64_t consumed)
 484 {
 485         struct lttng_evaluation_session_consumed_size *consumed_eval;
 486
 487         consumed_eval = zmalloc<lttng_evaluation_session_consumed_size>();
 488         if (!consumed_eval) {
 489                 goto end;
 490         }
 491
 492         consumed_eval->parent.type = LTTNG_CONDITION_TYPE_SESSION_CONSUMED_SIZE;
 493         consumed_eval->session_consumed = consumed;
 494         consumed_eval->parent.serialize = lttng_evaluation_session_consumed_size_serialize;
 495         consumed_eval->parent.destroy = lttng_evaluation_session_consumed_size_destroy;
 496 end:
 497         return &consumed_eval->parent;
 498 }
 499
 500 enum lttng_evaluation_status
 501 lttng_evaluation_session_consumed_size_get_consumed_size(
 502                 const struct lttng_evaluation *evaluation,
 503                 uint64_t *session_consumed)
 504 {
 505         struct lttng_evaluation_session_consumed_size *consumed;
 506         enum lttng_evaluation_status status = LTTNG_EVALUATION_STATUS_OK;
 507
 508         if (!evaluation || !IS_CONSUMED_SIZE_EVALUATION(evaluation) ||
 509                         !session_consumed) {
 510                 status = LTTNG_EVALUATION_STATUS_INVALID;
 511                 goto end;
 512         }
 513
 514         consumed = container_of(evaluation, struct lttng_evaluation_session_consumed_size,
 515                         parent);
 516         *session_consumed = consumed->session_consumed;
 517 end:
 518         return status;
 519 }