| 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 | |
| 12 | #include <lttng/condition/condition-internal.hpp> |
| 13 | #include <lttng/condition/session-rotation-internal.hpp> |
| 14 | #include <lttng/location-internal.hpp> |
| 15 | |
| 16 | #include <stdbool.h> |
| 17 | |
| 18 | static bool lttng_condition_session_rotation_validate(const struct lttng_condition *condition); |
| 19 | static int lttng_condition_session_rotation_serialize(const struct lttng_condition *condition, |
| 20 | struct lttng_payload *payload); |
| 21 | static bool lttng_condition_session_rotation_is_equal(const struct lttng_condition *_a, |
| 22 | const struct lttng_condition *_b); |
| 23 | static void lttng_condition_session_rotation_destroy(struct lttng_condition *condition); |
| 24 | |
| 25 | static enum lttng_error_code |
| 26 | lttng_condition_session_rotation_mi_serialize(const struct lttng_condition *condition, |
| 27 | struct mi_writer *writer); |
| 28 | |
| 29 | static const struct lttng_condition rotation_condition_template = { |
| 30 | {}, |
| 31 | LTTNG_CONDITION_TYPE_UNKNOWN, /* type unset, shall be set on creation. */ |
| 32 | lttng_condition_session_rotation_validate, |
| 33 | lttng_condition_session_rotation_serialize, |
| 34 | lttng_condition_session_rotation_is_equal, |
| 35 | lttng_condition_session_rotation_destroy, |
| 36 | lttng_condition_session_rotation_mi_serialize, |
| 37 | }; |
| 38 | |
| 39 | static int lttng_evaluation_session_rotation_serialize(const struct lttng_evaluation *evaluation, |
| 40 | struct lttng_payload *payload); |
| 41 | static void lttng_evaluation_session_rotation_destroy(struct lttng_evaluation *evaluation); |
| 42 | |
| 43 | static const struct lttng_evaluation rotation_evaluation_template = { |
| 44 | LTTNG_CONDITION_TYPE_UNKNOWN, /* type unset, shall be set on creation. */ |
| 45 | lttng_evaluation_session_rotation_serialize, |
| 46 | lttng_evaluation_session_rotation_destroy, |
| 47 | }; |
| 48 | |
| 49 | static bool is_rotation_condition(const struct lttng_condition *condition) |
| 50 | { |
| 51 | enum lttng_condition_type type = lttng_condition_get_type(condition); |
| 52 | |
| 53 | return type == LTTNG_CONDITION_TYPE_SESSION_ROTATION_ONGOING || |
| 54 | type == LTTNG_CONDITION_TYPE_SESSION_ROTATION_COMPLETED; |
| 55 | } |
| 56 | |
| 57 | static bool is_rotation_evaluation(const struct lttng_evaluation *evaluation) |
| 58 | { |
| 59 | enum lttng_condition_type type = lttng_evaluation_get_type(evaluation); |
| 60 | |
| 61 | return type == LTTNG_CONDITION_TYPE_SESSION_ROTATION_ONGOING || |
| 62 | type == LTTNG_CONDITION_TYPE_SESSION_ROTATION_COMPLETED; |
| 63 | } |
| 64 | |
| 65 | static bool lttng_condition_session_rotation_validate(const struct lttng_condition *condition) |
| 66 | { |
| 67 | bool valid = false; |
| 68 | struct lttng_condition_session_rotation *rotation; |
| 69 | |
| 70 | if (!condition) { |
| 71 | goto end; |
| 72 | } |
| 73 | |
| 74 | rotation = lttng::utils::container_of(condition, <tng_condition_session_rotation::parent); |
| 75 | if (!rotation->session_name) { |
| 76 | ERR("Invalid session rotation condition: a target session name must be set."); |
| 77 | goto end; |
| 78 | } |
| 79 | |
| 80 | valid = true; |
| 81 | end: |
| 82 | return valid; |
| 83 | } |
| 84 | |
| 85 | static int lttng_condition_session_rotation_serialize(const struct lttng_condition *condition, |
| 86 | struct lttng_payload *payload) |
| 87 | { |
| 88 | int ret; |
| 89 | size_t session_name_len; |
| 90 | struct lttng_condition_session_rotation *rotation; |
| 91 | struct lttng_condition_session_rotation_comm rotation_comm; |
| 92 | |
| 93 | if (!condition || !is_rotation_condition(condition)) { |
| 94 | ret = -1; |
| 95 | goto end; |
| 96 | } |
| 97 | |
| 98 | DBG("Serializing session rotation condition"); |
| 99 | rotation = lttng::utils::container_of(condition, <tng_condition_session_rotation::parent); |
| 100 | |
| 101 | session_name_len = strlen(rotation->session_name) + 1; |
| 102 | if (session_name_len > LTTNG_NAME_MAX) { |
| 103 | ret = -1; |
| 104 | goto end; |
| 105 | } |
| 106 | |
| 107 | rotation_comm.session_name_len = session_name_len; |
| 108 | ret = lttng_dynamic_buffer_append(&payload->buffer, &rotation_comm, sizeof(rotation_comm)); |
| 109 | if (ret) { |
| 110 | goto end; |
| 111 | } |
| 112 | ret = lttng_dynamic_buffer_append( |
| 113 | &payload->buffer, rotation->session_name, session_name_len); |
| 114 | if (ret) { |
| 115 | goto end; |
| 116 | } |
| 117 | end: |
| 118 | return ret; |
| 119 | } |
| 120 | |
| 121 | static bool lttng_condition_session_rotation_is_equal(const struct lttng_condition *_a, |
| 122 | const struct lttng_condition *_b) |
| 123 | { |
| 124 | bool is_equal = false; |
| 125 | struct lttng_condition_session_rotation *a, *b; |
| 126 | |
| 127 | a = lttng::utils::container_of(_a, <tng_condition_session_rotation::parent); |
| 128 | b = lttng::utils::container_of(_b, <tng_condition_session_rotation::parent); |
| 129 | |
| 130 | /* Both session names must be set or both must be unset. */ |
| 131 | if ((a->session_name && !b->session_name) || (!a->session_name && b->session_name)) { |
| 132 | WARN("Comparing session rotation conditions with uninitialized session names."); |
| 133 | goto end; |
| 134 | } |
| 135 | |
| 136 | if (a->session_name && b->session_name && strcmp(a->session_name, b->session_name) != 0) { |
| 137 | goto end; |
| 138 | } |
| 139 | |
| 140 | is_equal = true; |
| 141 | end: |
| 142 | return is_equal; |
| 143 | } |
| 144 | |
| 145 | static void lttng_condition_session_rotation_destroy(struct lttng_condition *condition) |
| 146 | { |
| 147 | struct lttng_condition_session_rotation *rotation; |
| 148 | |
| 149 | rotation = lttng::utils::container_of(condition, <tng_condition_session_rotation::parent); |
| 150 | |
| 151 | free(rotation->session_name); |
| 152 | free(rotation); |
| 153 | } |
| 154 | |
| 155 | static struct lttng_condition * |
| 156 | lttng_condition_session_rotation_create(enum lttng_condition_type type) |
| 157 | { |
| 158 | struct lttng_condition_session_rotation *condition; |
| 159 | |
| 160 | condition = zmalloc<lttng_condition_session_rotation>(); |
| 161 | if (!condition) { |
| 162 | return nullptr; |
| 163 | } |
| 164 | |
| 165 | memcpy(&condition->parent, &rotation_condition_template, sizeof(condition->parent)); |
| 166 | lttng_condition_init(&condition->parent, type); |
| 167 | return &condition->parent; |
| 168 | } |
| 169 | |
| 170 | struct lttng_condition *lttng_condition_session_rotation_ongoing_create(void) |
| 171 | { |
| 172 | return lttng_condition_session_rotation_create( |
| 173 | LTTNG_CONDITION_TYPE_SESSION_ROTATION_ONGOING); |
| 174 | } |
| 175 | |
| 176 | struct lttng_condition *lttng_condition_session_rotation_completed_create(void) |
| 177 | { |
| 178 | return lttng_condition_session_rotation_create( |
| 179 | LTTNG_CONDITION_TYPE_SESSION_ROTATION_COMPLETED); |
| 180 | } |
| 181 | |
| 182 | static ssize_t init_condition_from_payload(struct lttng_condition *condition, |
| 183 | struct lttng_payload_view *src_view) |
| 184 | { |
| 185 | ssize_t ret, condition_size; |
| 186 | enum lttng_condition_status status; |
| 187 | const char *session_name; |
| 188 | struct lttng_buffer_view name_view; |
| 189 | const struct lttng_condition_session_rotation_comm *condition_comm; |
| 190 | struct lttng_payload_view condition_comm_view = |
| 191 | lttng_payload_view_from_view(src_view, 0, sizeof(*condition_comm)); |
| 192 | |
| 193 | if (!lttng_payload_view_is_valid(&condition_comm_view)) { |
| 194 | ERR("Failed to initialize from malformed condition buffer: buffer too short to contain header"); |
| 195 | ret = -1; |
| 196 | goto end; |
| 197 | } |
| 198 | |
| 199 | condition_comm = (typeof(condition_comm)) src_view->buffer.data; |
| 200 | name_view = lttng_buffer_view_from_view( |
| 201 | &src_view->buffer, sizeof(*condition_comm), condition_comm->session_name_len); |
| 202 | |
| 203 | if (!lttng_buffer_view_is_valid(&name_view)) { |
| 204 | ERR("Failed to initialize from malformed condition buffer: buffer too short to contain session name"); |
| 205 | ret = -1; |
| 206 | goto end; |
| 207 | } |
| 208 | |
| 209 | if (condition_comm->session_name_len > LTTNG_NAME_MAX) { |
| 210 | ERR("Failed to initialize from malformed condition buffer: name exceeds LTTNG_MAX_NAME"); |
| 211 | ret = -1; |
| 212 | goto end; |
| 213 | } |
| 214 | |
| 215 | session_name = name_view.data; |
| 216 | if (*(session_name + condition_comm->session_name_len - 1) != '\0') { |
| 217 | ERR("Malformed session name encountered in condition buffer"); |
| 218 | ret = -1; |
| 219 | goto end; |
| 220 | } |
| 221 | |
| 222 | status = lttng_condition_session_rotation_set_session_name(condition, session_name); |
| 223 | if (status != LTTNG_CONDITION_STATUS_OK) { |
| 224 | ERR("Failed to set buffer consumed session name"); |
| 225 | ret = -1; |
| 226 | goto end; |
| 227 | } |
| 228 | |
| 229 | if (!lttng_condition_validate(condition)) { |
| 230 | ret = -1; |
| 231 | goto end; |
| 232 | } |
| 233 | |
| 234 | condition_size = sizeof(*condition_comm) + (ssize_t) condition_comm->session_name_len; |
| 235 | ret = condition_size; |
| 236 | end: |
| 237 | return ret; |
| 238 | } |
| 239 | |
| 240 | static ssize_t |
| 241 | lttng_condition_session_rotation_create_from_payload(struct lttng_payload_view *view, |
| 242 | struct lttng_condition **_condition, |
| 243 | enum lttng_condition_type type) |
| 244 | { |
| 245 | ssize_t ret; |
| 246 | struct lttng_condition *condition = nullptr; |
| 247 | |
| 248 | switch (type) { |
| 249 | case LTTNG_CONDITION_TYPE_SESSION_ROTATION_ONGOING: |
| 250 | condition = lttng_condition_session_rotation_ongoing_create(); |
| 251 | break; |
| 252 | case LTTNG_CONDITION_TYPE_SESSION_ROTATION_COMPLETED: |
| 253 | condition = lttng_condition_session_rotation_completed_create(); |
| 254 | break; |
| 255 | default: |
| 256 | ret = -1; |
| 257 | goto error; |
| 258 | } |
| 259 | |
| 260 | if (!_condition || !condition) { |
| 261 | ret = -1; |
| 262 | goto error; |
| 263 | } |
| 264 | |
| 265 | ret = init_condition_from_payload(condition, view); |
| 266 | if (ret < 0) { |
| 267 | goto error; |
| 268 | } |
| 269 | |
| 270 | *_condition = condition; |
| 271 | return ret; |
| 272 | error: |
| 273 | lttng_condition_destroy(condition); |
| 274 | return ret; |
| 275 | } |
| 276 | |
| 277 | ssize_t |
| 278 | lttng_condition_session_rotation_ongoing_create_from_payload(struct lttng_payload_view *view, |
| 279 | struct lttng_condition **condition) |
| 280 | { |
| 281 | return lttng_condition_session_rotation_create_from_payload( |
| 282 | view, condition, LTTNG_CONDITION_TYPE_SESSION_ROTATION_ONGOING); |
| 283 | } |
| 284 | |
| 285 | ssize_t |
| 286 | lttng_condition_session_rotation_completed_create_from_payload(struct lttng_payload_view *view, |
| 287 | struct lttng_condition **condition) |
| 288 | { |
| 289 | return lttng_condition_session_rotation_create_from_payload( |
| 290 | view, condition, LTTNG_CONDITION_TYPE_SESSION_ROTATION_COMPLETED); |
| 291 | } |
| 292 | |
| 293 | static struct lttng_evaluation *lttng_evaluation_session_rotation_create( |
| 294 | enum lttng_condition_type type, uint64_t id, struct lttng_trace_archive_location *location) |
| 295 | { |
| 296 | struct lttng_evaluation_session_rotation *evaluation; |
| 297 | |
| 298 | evaluation = zmalloc<lttng_evaluation_session_rotation>(); |
| 299 | if (!evaluation) { |
| 300 | return nullptr; |
| 301 | } |
| 302 | |
| 303 | memcpy(&evaluation->parent, &rotation_evaluation_template, sizeof(evaluation->parent)); |
| 304 | lttng_evaluation_init(&evaluation->parent, type); |
| 305 | evaluation->id = id; |
| 306 | if (location) { |
| 307 | lttng_trace_archive_location_get(location); |
| 308 | } |
| 309 | evaluation->location = location; |
| 310 | return &evaluation->parent; |
| 311 | } |
| 312 | |
| 313 | static ssize_t create_evaluation_from_payload(enum lttng_condition_type type, |
| 314 | struct lttng_payload_view *view, |
| 315 | struct lttng_evaluation **_evaluation) |
| 316 | { |
| 317 | ssize_t ret, size; |
| 318 | struct lttng_evaluation *evaluation = nullptr; |
| 319 | struct lttng_trace_archive_location *location = nullptr; |
| 320 | const struct lttng_evaluation_session_rotation_comm *comm; |
| 321 | struct lttng_payload_view comm_view = lttng_payload_view_from_view(view, 0, sizeof(*comm)); |
| 322 | |
| 323 | if (!lttng_payload_view_is_valid(&comm_view)) { |
| 324 | goto error; |
| 325 | } |
| 326 | |
| 327 | comm = (typeof(comm)) comm_view.buffer.data; |
| 328 | size = sizeof(*comm); |
| 329 | if (comm->has_location) { |
| 330 | const struct lttng_buffer_view location_view = |
| 331 | lttng_buffer_view_from_view(&view->buffer, sizeof(*comm), -1); |
| 332 | |
| 333 | if (!lttng_buffer_view_is_valid(&location_view)) { |
| 334 | goto error; |
| 335 | } |
| 336 | |
| 337 | ret = lttng_trace_archive_location_create_from_buffer(&location_view, &location); |
| 338 | if (ret < 0) { |
| 339 | goto error; |
| 340 | } |
| 341 | size += ret; |
| 342 | } |
| 343 | |
| 344 | evaluation = lttng_evaluation_session_rotation_create(type, comm->id, location); |
| 345 | if (!evaluation) { |
| 346 | goto error; |
| 347 | } |
| 348 | |
| 349 | lttng_trace_archive_location_put(location); |
| 350 | ret = size; |
| 351 | *_evaluation = evaluation; |
| 352 | return ret; |
| 353 | error: |
| 354 | lttng_trace_archive_location_put(location); |
| 355 | evaluation = nullptr; |
| 356 | return -1; |
| 357 | } |
| 358 | |
| 359 | static ssize_t |
| 360 | lttng_evaluation_session_rotation_create_from_payload(enum lttng_condition_type type, |
| 361 | struct lttng_payload_view *view, |
| 362 | struct lttng_evaluation **_evaluation) |
| 363 | { |
| 364 | ssize_t ret; |
| 365 | struct lttng_evaluation *evaluation = nullptr; |
| 366 | |
| 367 | if (!_evaluation) { |
| 368 | ret = -1; |
| 369 | goto error; |
| 370 | } |
| 371 | |
| 372 | ret = create_evaluation_from_payload(type, view, &evaluation); |
| 373 | if (ret < 0) { |
| 374 | goto error; |
| 375 | } |
| 376 | |
| 377 | *_evaluation = evaluation; |
| 378 | return ret; |
| 379 | error: |
| 380 | lttng_evaluation_destroy(evaluation); |
| 381 | return ret; |
| 382 | } |
| 383 | |
| 384 | ssize_t |
| 385 | lttng_evaluation_session_rotation_ongoing_create_from_payload(struct lttng_payload_view *view, |
| 386 | struct lttng_evaluation **evaluation) |
| 387 | { |
| 388 | return lttng_evaluation_session_rotation_create_from_payload( |
| 389 | LTTNG_CONDITION_TYPE_SESSION_ROTATION_ONGOING, view, evaluation); |
| 390 | } |
| 391 | |
| 392 | ssize_t lttng_evaluation_session_rotation_completed_create_from_payload( |
| 393 | struct lttng_payload_view *view, struct lttng_evaluation **evaluation) |
| 394 | { |
| 395 | return lttng_evaluation_session_rotation_create_from_payload( |
| 396 | LTTNG_CONDITION_TYPE_SESSION_ROTATION_COMPLETED, view, evaluation); |
| 397 | } |
| 398 | |
| 399 | struct lttng_evaluation *lttng_evaluation_session_rotation_ongoing_create(uint64_t id) |
| 400 | { |
| 401 | return lttng_evaluation_session_rotation_create( |
| 402 | LTTNG_CONDITION_TYPE_SESSION_ROTATION_ONGOING, id, nullptr); |
| 403 | } |
| 404 | |
| 405 | struct lttng_evaluation * |
| 406 | lttng_evaluation_session_rotation_completed_create(uint64_t id, |
| 407 | struct lttng_trace_archive_location *location) |
| 408 | { |
| 409 | return lttng_evaluation_session_rotation_create( |
| 410 | LTTNG_CONDITION_TYPE_SESSION_ROTATION_COMPLETED, id, location); |
| 411 | } |
| 412 | |
| 413 | enum lttng_condition_status |
| 414 | lttng_condition_session_rotation_get_session_name(const struct lttng_condition *condition, |
| 415 | const char **session_name) |
| 416 | { |
| 417 | struct lttng_condition_session_rotation *rotation; |
| 418 | enum lttng_condition_status status = LTTNG_CONDITION_STATUS_OK; |
| 419 | |
| 420 | if (!condition || !is_rotation_condition(condition) || !session_name) { |
| 421 | status = LTTNG_CONDITION_STATUS_INVALID; |
| 422 | goto end; |
| 423 | } |
| 424 | |
| 425 | rotation = lttng::utils::container_of(condition, <tng_condition_session_rotation::parent); |
| 426 | if (!rotation->session_name) { |
| 427 | status = LTTNG_CONDITION_STATUS_UNSET; |
| 428 | goto end; |
| 429 | } |
| 430 | *session_name = rotation->session_name; |
| 431 | end: |
| 432 | return status; |
| 433 | } |
| 434 | |
| 435 | enum lttng_condition_status |
| 436 | lttng_condition_session_rotation_set_session_name(struct lttng_condition *condition, |
| 437 | const char *session_name) |
| 438 | { |
| 439 | char *session_name_copy; |
| 440 | struct lttng_condition_session_rotation *rotation; |
| 441 | enum lttng_condition_status status = LTTNG_CONDITION_STATUS_OK; |
| 442 | |
| 443 | if (!condition || !is_rotation_condition(condition) || !session_name || |
| 444 | strlen(session_name) == 0) { |
| 445 | status = LTTNG_CONDITION_STATUS_INVALID; |
| 446 | goto end; |
| 447 | } |
| 448 | |
| 449 | rotation = lttng::utils::container_of(condition, <tng_condition_session_rotation::parent); |
| 450 | session_name_copy = strdup(session_name); |
| 451 | if (!session_name_copy) { |
| 452 | status = LTTNG_CONDITION_STATUS_ERROR; |
| 453 | goto end; |
| 454 | } |
| 455 | |
| 456 | free(rotation->session_name); |
| 457 | rotation->session_name = session_name_copy; |
| 458 | end: |
| 459 | return status; |
| 460 | } |
| 461 | |
| 462 | static int lttng_evaluation_session_rotation_serialize(const struct lttng_evaluation *evaluation, |
| 463 | struct lttng_payload *payload) |
| 464 | { |
| 465 | int ret; |
| 466 | struct lttng_evaluation_session_rotation *rotation; |
| 467 | struct lttng_evaluation_session_rotation_comm comm = {}; |
| 468 | |
| 469 | rotation = |
| 470 | lttng::utils::container_of(evaluation, <tng_evaluation_session_rotation::parent); |
| 471 | comm.id = rotation->id; |
| 472 | comm.has_location = !!rotation->location; |
| 473 | ret = lttng_dynamic_buffer_append(&payload->buffer, &comm, sizeof(comm)); |
| 474 | if (ret) { |
| 475 | goto end; |
| 476 | } |
| 477 | if (!rotation->location) { |
| 478 | goto end; |
| 479 | } |
| 480 | ret = lttng_trace_archive_location_serialize(rotation->location, &payload->buffer); |
| 481 | end: |
| 482 | return ret; |
| 483 | } |
| 484 | |
| 485 | static void lttng_evaluation_session_rotation_destroy(struct lttng_evaluation *evaluation) |
| 486 | { |
| 487 | struct lttng_evaluation_session_rotation *rotation; |
| 488 | |
| 489 | rotation = |
| 490 | lttng::utils::container_of(evaluation, <tng_evaluation_session_rotation::parent); |
| 491 | lttng_trace_archive_location_put(rotation->location); |
| 492 | free(rotation); |
| 493 | } |
| 494 | |
| 495 | enum lttng_evaluation_status |
| 496 | lttng_evaluation_session_rotation_get_id(const struct lttng_evaluation *evaluation, uint64_t *id) |
| 497 | { |
| 498 | const struct lttng_evaluation_session_rotation *rotation; |
| 499 | enum lttng_evaluation_status status = LTTNG_EVALUATION_STATUS_OK; |
| 500 | |
| 501 | if (!evaluation || !id || !is_rotation_evaluation(evaluation)) { |
| 502 | status = LTTNG_EVALUATION_STATUS_INVALID; |
| 503 | goto end; |
| 504 | } |
| 505 | |
| 506 | rotation = |
| 507 | lttng::utils::container_of(evaluation, <tng_evaluation_session_rotation::parent); |
| 508 | *id = rotation->id; |
| 509 | end: |
| 510 | return status; |
| 511 | } |
| 512 | |
| 513 | /* |
| 514 | * The public API assumes that trace archive locations are always provided as |
| 515 | * "constant". This means that the user of liblttng-ctl never has to destroy a |
| 516 | * trace archive location. Hence, users of liblttng-ctl have no visibility of |
| 517 | * the reference counting of archive locations. |
| 518 | */ |
| 519 | enum lttng_evaluation_status lttng_evaluation_session_rotation_completed_get_location( |
| 520 | const struct lttng_evaluation *evaluation, |
| 521 | const struct lttng_trace_archive_location **location) |
| 522 | { |
| 523 | const struct lttng_evaluation_session_rotation *rotation; |
| 524 | enum lttng_evaluation_status status = LTTNG_EVALUATION_STATUS_OK; |
| 525 | |
| 526 | if (!evaluation || !location || |
| 527 | evaluation->type != LTTNG_CONDITION_TYPE_SESSION_ROTATION_COMPLETED) { |
| 528 | status = LTTNG_EVALUATION_STATUS_INVALID; |
| 529 | goto end; |
| 530 | } |
| 531 | |
| 532 | rotation = |
| 533 | lttng::utils::container_of(evaluation, <tng_evaluation_session_rotation::parent); |
| 534 | *location = rotation->location; |
| 535 | end: |
| 536 | return status; |
| 537 | } |
| 538 | |
| 539 | static enum lttng_error_code |
| 540 | lttng_condition_session_rotation_mi_serialize(const struct lttng_condition *condition, |
| 541 | struct mi_writer *writer) |
| 542 | { |
| 543 | int ret; |
| 544 | enum lttng_error_code ret_code; |
| 545 | enum lttng_condition_status status; |
| 546 | const char *session_name = nullptr; |
| 547 | const char *type_element_str = nullptr; |
| 548 | |
| 549 | LTTNG_ASSERT(condition); |
| 550 | LTTNG_ASSERT(writer); |
| 551 | LTTNG_ASSERT(is_rotation_condition(condition)); |
| 552 | |
| 553 | switch (lttng_condition_get_type(condition)) { |
| 554 | case LTTNG_CONDITION_TYPE_SESSION_ROTATION_COMPLETED: |
| 555 | type_element_str = mi_lttng_element_condition_session_rotation_completed; |
| 556 | break; |
| 557 | case LTTNG_CONDITION_TYPE_SESSION_ROTATION_ONGOING: |
| 558 | type_element_str = mi_lttng_element_condition_session_rotation_ongoing; |
| 559 | break; |
| 560 | default: |
| 561 | abort(); |
| 562 | break; |
| 563 | } |
| 564 | |
| 565 | status = lttng_condition_session_rotation_get_session_name(condition, &session_name); |
| 566 | LTTNG_ASSERT(status == LTTNG_CONDITION_STATUS_OK); |
| 567 | LTTNG_ASSERT(session_name); |
| 568 | |
| 569 | /* Open condition session rotation_* element. */ |
| 570 | ret = mi_lttng_writer_open_element(writer, type_element_str); |
| 571 | if (ret) { |
| 572 | goto mi_error; |
| 573 | } |
| 574 | |
| 575 | /* Session name. */ |
| 576 | ret = mi_lttng_writer_write_element_string( |
| 577 | writer, mi_lttng_element_session_name, session_name); |
| 578 | if (ret) { |
| 579 | goto mi_error; |
| 580 | } |
| 581 | |
| 582 | /* Close condition session rotation element. */ |
| 583 | ret = mi_lttng_writer_close_element(writer); |
| 584 | if (ret) { |
| 585 | goto mi_error; |
| 586 | } |
| 587 | |
| 588 | ret_code = LTTNG_OK; |
| 589 | goto end; |
| 590 | |
| 591 | mi_error: |
| 592 | ret_code = LTTNG_ERR_MI_IO_FAIL; |
| 593 | end: |
| 594 | return ret_code; |
| 595 | } |