| 1 | /* |
| 2 | * Copyright (C) 2014 - David Goulet <dgoulet@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 | #define _LGPL_SOURCE |
| 19 | #include <assert.h> |
| 20 | #include <string.h> |
| 21 | #include <limits.h> |
| 22 | |
| 23 | #include <lttng/lttng-error.h> |
| 24 | #include <lttng/load.h> |
| 25 | #include <lttng/load-internal.h> |
| 26 | #include <common/sessiond-comm/sessiond-comm.h> |
| 27 | #include <common/config/session-config.h> |
| 28 | #include <common/uri.h> |
| 29 | #include <common/macros.h> |
| 30 | #include <common/compat/string.h> |
| 31 | |
| 32 | #include "lttng-ctl-helper.h" |
| 33 | |
| 34 | struct lttng_load_session_attr *lttng_load_session_attr_create(void) |
| 35 | { |
| 36 | return zmalloc(sizeof(struct lttng_load_session_attr)); |
| 37 | } |
| 38 | |
| 39 | static |
| 40 | void reset_load_session_attr_urls(struct lttng_load_session_attr *attr) |
| 41 | { |
| 42 | free(attr->raw_override_url); |
| 43 | free(attr->raw_override_path_url); |
| 44 | free(attr->raw_override_ctrl_url); |
| 45 | free(attr->raw_override_data_url); |
| 46 | free(attr->override_attr.path_url); |
| 47 | free(attr->override_attr.ctrl_url); |
| 48 | free(attr->override_attr.data_url); |
| 49 | } |
| 50 | |
| 51 | void lttng_load_session_attr_destroy(struct lttng_load_session_attr *attr) |
| 52 | { |
| 53 | if (attr) { |
| 54 | reset_load_session_attr_urls(attr); |
| 55 | free(attr); |
| 56 | } |
| 57 | } |
| 58 | |
| 59 | const char *lttng_load_session_attr_get_session_name( |
| 60 | struct lttng_load_session_attr *attr) |
| 61 | { |
| 62 | const char *ret = NULL; |
| 63 | |
| 64 | if (attr && attr->session_name[0]) { |
| 65 | ret = attr->session_name; |
| 66 | } |
| 67 | |
| 68 | return ret; |
| 69 | } |
| 70 | |
| 71 | const char *lttng_load_session_attr_get_input_url( |
| 72 | struct lttng_load_session_attr *attr) |
| 73 | { |
| 74 | const char *ret = NULL; |
| 75 | |
| 76 | if (attr && attr->input_url[0]) { |
| 77 | ret = attr->input_url; |
| 78 | } |
| 79 | |
| 80 | return ret; |
| 81 | } |
| 82 | |
| 83 | int lttng_load_session_attr_get_overwrite( |
| 84 | struct lttng_load_session_attr *attr) |
| 85 | { |
| 86 | return attr ? attr->overwrite : -LTTNG_ERR_INVALID; |
| 87 | } |
| 88 | |
| 89 | const char *lttng_load_session_attr_get_override_path_url( |
| 90 | struct lttng_load_session_attr *attr) |
| 91 | { |
| 92 | const char *ret = NULL; |
| 93 | |
| 94 | if (attr && attr->override_attr.path_url) { |
| 95 | ret = attr->raw_override_path_url; |
| 96 | } |
| 97 | |
| 98 | return ret; |
| 99 | } |
| 100 | |
| 101 | const char *lttng_load_session_attr_get_override_ctrl_url( |
| 102 | struct lttng_load_session_attr *attr) |
| 103 | { |
| 104 | const char *ret = NULL; |
| 105 | |
| 106 | if (attr && attr->override_attr.ctrl_url) { |
| 107 | ret = attr->raw_override_ctrl_url; |
| 108 | } |
| 109 | |
| 110 | return ret; |
| 111 | } |
| 112 | |
| 113 | const char *lttng_load_session_attr_get_override_data_url( |
| 114 | struct lttng_load_session_attr *attr) |
| 115 | { |
| 116 | const char *ret = NULL; |
| 117 | |
| 118 | if (attr && attr->override_attr.data_url) { |
| 119 | ret = attr->raw_override_data_url; |
| 120 | } |
| 121 | |
| 122 | return ret; |
| 123 | } |
| 124 | |
| 125 | const char *lttng_load_session_attr_get_override_url( |
| 126 | struct lttng_load_session_attr *attr) |
| 127 | { |
| 128 | const char *ret = NULL; |
| 129 | |
| 130 | if (attr && (attr->override_attr.path_url || |
| 131 | (attr->override_attr.ctrl_url && |
| 132 | attr->override_attr.data_url))) { |
| 133 | ret = attr->raw_override_url; |
| 134 | } |
| 135 | |
| 136 | return ret; |
| 137 | } |
| 138 | |
| 139 | int lttng_load_session_attr_set_session_name( |
| 140 | struct lttng_load_session_attr *attr, const char *session_name) |
| 141 | { |
| 142 | int ret = 0; |
| 143 | |
| 144 | if (!attr) { |
| 145 | ret = -LTTNG_ERR_INVALID; |
| 146 | goto error; |
| 147 | } |
| 148 | |
| 149 | if (session_name) { |
| 150 | size_t len; |
| 151 | |
| 152 | len = strlen(session_name); |
| 153 | if (len >= LTTNG_NAME_MAX) { |
| 154 | ret = -LTTNG_ERR_INVALID; |
| 155 | goto error; |
| 156 | } |
| 157 | |
| 158 | strncpy(attr->session_name, session_name, len); |
| 159 | } else { |
| 160 | attr->session_name[0] = '\0'; |
| 161 | } |
| 162 | error: |
| 163 | return ret; |
| 164 | } |
| 165 | |
| 166 | int lttng_load_session_attr_set_input_url( |
| 167 | struct lttng_load_session_attr *attr, const char *url) |
| 168 | { |
| 169 | int ret = 0; |
| 170 | size_t len; |
| 171 | ssize_t size; |
| 172 | struct lttng_uri *uris = NULL; |
| 173 | |
| 174 | if (!attr) { |
| 175 | ret = -LTTNG_ERR_INVALID; |
| 176 | goto error; |
| 177 | } |
| 178 | |
| 179 | if (!url) { |
| 180 | attr->input_url[0] = '\0'; |
| 181 | ret = 0; |
| 182 | goto end; |
| 183 | } |
| 184 | |
| 185 | len = strlen(url); |
| 186 | if (len >= PATH_MAX) { |
| 187 | ret = -LTTNG_ERR_INVALID; |
| 188 | goto error; |
| 189 | } |
| 190 | |
| 191 | size = uri_parse_str_urls(url, NULL, &uris); |
| 192 | if (size <= 0 || uris[0].dtype != LTTNG_DST_PATH) { |
| 193 | ret = -LTTNG_ERR_INVALID; |
| 194 | goto error; |
| 195 | } |
| 196 | |
| 197 | /* Copy string plus the NULL terminated byte. */ |
| 198 | lttng_ctl_copy_string(attr->input_url, uris[0].dst.path, |
| 199 | sizeof(attr->input_url)); |
| 200 | |
| 201 | end: |
| 202 | error: |
| 203 | free(uris); |
| 204 | return ret; |
| 205 | } |
| 206 | |
| 207 | int lttng_load_session_attr_set_overwrite( |
| 208 | struct lttng_load_session_attr *attr, int overwrite) |
| 209 | { |
| 210 | int ret = 0; |
| 211 | |
| 212 | if (!attr) { |
| 213 | ret = -LTTNG_ERR_INVALID; |
| 214 | goto end; |
| 215 | } |
| 216 | |
| 217 | attr->overwrite = !!overwrite; |
| 218 | end: |
| 219 | return ret; |
| 220 | } |
| 221 | |
| 222 | int lttng_load_session_attr_set_override_ctrl_url( |
| 223 | struct lttng_load_session_attr *attr, const char *url) |
| 224 | { |
| 225 | int ret = 0; |
| 226 | ssize_t ret_size; |
| 227 | struct lttng_uri *uri = NULL; |
| 228 | char *url_str = NULL; |
| 229 | char *raw_str = NULL; |
| 230 | |
| 231 | if (!attr) { |
| 232 | ret = -LTTNG_ERR_INVALID; |
| 233 | goto end; |
| 234 | } |
| 235 | |
| 236 | if (attr->override_attr.path_url) { |
| 237 | /* |
| 238 | * FIXME: return a more meaningful error. |
| 239 | * Setting a ctrl override after a path override make no |
| 240 | * sense. |
| 241 | * */ |
| 242 | ret = -LTTNG_ERR_INVALID; |
| 243 | goto end; |
| 244 | } |
| 245 | |
| 246 | /* |
| 247 | * FIXME: uri_parse should be able to take as parameter the protocol |
| 248 | * type to validate "url". For now only check the parsing goes through; |
| 249 | * it will fail later on. |
| 250 | */ |
| 251 | ret_size = uri_parse(url, &uri); |
| 252 | if (ret_size < 0) { |
| 253 | ret = -LTTNG_ERR_INVALID; |
| 254 | goto end; |
| 255 | } |
| 256 | |
| 257 | if (uri[0].port == 0) { |
| 258 | uri[0].port = DEFAULT_NETWORK_CONTROL_PORT; |
| 259 | } |
| 260 | |
| 261 | url_str = zmalloc(PATH_MAX); |
| 262 | if (!url_str) { |
| 263 | /* FIXME: return valid error */ |
| 264 | ret = -LTTNG_ERR_NOMEM; |
| 265 | goto end; |
| 266 | } |
| 267 | |
| 268 | ret = uri_to_str_url(&uri[0], url_str, PATH_MAX); |
| 269 | if (ret < 0) { |
| 270 | ret = -LTTNG_ERR_INVALID; |
| 271 | goto end; |
| 272 | } |
| 273 | ret = 0; |
| 274 | |
| 275 | raw_str = lttng_strndup(url, PATH_MAX); |
| 276 | if (!raw_str) { |
| 277 | ret = -LTTNG_ERR_NOMEM; |
| 278 | goto end; |
| 279 | } |
| 280 | |
| 281 | /* Squash old value if any */ |
| 282 | free(attr->override_attr.ctrl_url); |
| 283 | free(attr->raw_override_ctrl_url); |
| 284 | |
| 285 | /* Populate the object */ |
| 286 | attr->override_attr.ctrl_url = url_str; |
| 287 | attr->raw_override_ctrl_url = raw_str; |
| 288 | |
| 289 | /* Ownership passed to attr. */ |
| 290 | url_str = NULL; |
| 291 | raw_str = NULL; |
| 292 | |
| 293 | end: |
| 294 | free(raw_str); |
| 295 | free(url_str); |
| 296 | free(uri); |
| 297 | return ret; |
| 298 | } |
| 299 | |
| 300 | int lttng_load_session_attr_set_override_data_url( |
| 301 | struct lttng_load_session_attr *attr, const char *url) |
| 302 | { |
| 303 | int ret = 0; |
| 304 | ssize_t ret_size; |
| 305 | struct lttng_uri *uri = NULL; |
| 306 | char *url_str = NULL; |
| 307 | char *raw_str = NULL; |
| 308 | |
| 309 | if (!attr) { |
| 310 | ret = -LTTNG_ERR_INVALID; |
| 311 | goto end; |
| 312 | } |
| 313 | |
| 314 | if (attr->override_attr.path_url) { |
| 315 | ret = -LTTNG_ERR_INVALID; |
| 316 | goto end; |
| 317 | } |
| 318 | |
| 319 | /* |
| 320 | * FIXME: uri_parse should be able to take as parameter the protocol |
| 321 | * type to validate "url". For now only check the parsing goes through; |
| 322 | * it will fail later on. |
| 323 | */ |
| 324 | ret_size = uri_parse(url, &uri); |
| 325 | if (ret_size < 0) { |
| 326 | ret = -LTTNG_ERR_INVALID; |
| 327 | goto end; |
| 328 | } |
| 329 | |
| 330 | if (uri[0].port == 0) { |
| 331 | uri[0].port = DEFAULT_NETWORK_DATA_PORT; |
| 332 | } |
| 333 | |
| 334 | url_str = zmalloc(PATH_MAX); |
| 335 | if (!url_str) { |
| 336 | ret = -LTTNG_ERR_NOMEM; |
| 337 | goto end; |
| 338 | } |
| 339 | |
| 340 | ret = uri_to_str_url(&uri[0], url_str, PATH_MAX); |
| 341 | if (ret < 0) { |
| 342 | ret = -LTTNG_ERR_INVALID; |
| 343 | goto end; |
| 344 | } |
| 345 | ret = 0; |
| 346 | |
| 347 | raw_str = lttng_strndup(url, PATH_MAX); |
| 348 | if (!raw_str) { |
| 349 | ret = -LTTNG_ERR_NOMEM; |
| 350 | goto end; |
| 351 | } |
| 352 | |
| 353 | /* Squash old value if any */ |
| 354 | free(attr->override_attr.data_url); |
| 355 | free(attr->raw_override_data_url); |
| 356 | |
| 357 | /* Populate the object */ |
| 358 | attr->override_attr.data_url = url_str; |
| 359 | attr->raw_override_data_url = raw_str; |
| 360 | |
| 361 | /* Ownership passed to attr. */ |
| 362 | url_str = NULL; |
| 363 | raw_str = NULL; |
| 364 | end: |
| 365 | free(raw_str); |
| 366 | free(url_str); |
| 367 | free(uri); |
| 368 | return ret; |
| 369 | } |
| 370 | |
| 371 | int lttng_load_session_attr_set_override_url( |
| 372 | struct lttng_load_session_attr *attr, const char *url) |
| 373 | { |
| 374 | int ret = 0; |
| 375 | ssize_t ret_size; |
| 376 | struct lttng_uri *uri = NULL; |
| 377 | char *raw_url_str = NULL; |
| 378 | char *raw_path_str = NULL; |
| 379 | char *path_str = NULL; |
| 380 | char *raw_ctrl_str = NULL; |
| 381 | char *ctrl_str = NULL; |
| 382 | char *raw_data_str = NULL; |
| 383 | char *data_str = NULL; |
| 384 | char buffer[PATH_MAX]; |
| 385 | |
| 386 | if (!attr || !url || strlen(url) >= PATH_MAX) { |
| 387 | ret = -LTTNG_ERR_INVALID; |
| 388 | goto end; |
| 389 | } |
| 390 | |
| 391 | /* |
| 392 | * FIXME: uri_parse should be able to take as parameter the protocol |
| 393 | * type to validate "url". For now only check the parsing goes through; |
| 394 | * it will fail later on. |
| 395 | */ |
| 396 | ret_size = uri_parse_str_urls(url, NULL, &uri); |
| 397 | if (ret_size < 0 || ret_size > 2) { |
| 398 | /* Unexpected URL format. */ |
| 399 | ret = -LTTNG_ERR_INVALID; |
| 400 | goto end; |
| 401 | } |
| 402 | |
| 403 | raw_url_str = lttng_strndup(url, PATH_MAX); |
| 404 | if (!raw_url_str) { |
| 405 | ret = -LTTNG_ERR_NOMEM; |
| 406 | goto end; |
| 407 | } |
| 408 | |
| 409 | /* Get path | ctrl && data string URL. */ |
| 410 | ret = uri_to_str_url(&uri[0], buffer, sizeof(buffer)); |
| 411 | if (ret < 0 || ret >= PATH_MAX) { |
| 412 | ret = -LTTNG_ERR_INVALID; |
| 413 | goto end; |
| 414 | } |
| 415 | ret = 0; |
| 416 | |
| 417 | switch (uri[0].dtype) { |
| 418 | case LTTNG_DST_PATH: |
| 419 | raw_path_str = lttng_strndup(buffer, PATH_MAX); |
| 420 | if (!raw_path_str) { |
| 421 | ret = -LTTNG_ERR_NOMEM; |
| 422 | goto end; |
| 423 | } |
| 424 | |
| 425 | path_str = lttng_strndup(raw_path_str, PATH_MAX); |
| 426 | if (!path_str) { |
| 427 | ret = -LTTNG_ERR_NOMEM; |
| 428 | goto end; |
| 429 | } |
| 430 | break; |
| 431 | case LTTNG_DST_IPV4: |
| 432 | case LTTNG_DST_IPV6: |
| 433 | if (ret_size != 2) { |
| 434 | ret = -LTTNG_ERR_INVALID; |
| 435 | goto end; |
| 436 | } |
| 437 | |
| 438 | raw_ctrl_str = lttng_strndup(buffer, PATH_MAX); |
| 439 | if (!raw_ctrl_str) { |
| 440 | ret = -LTTNG_ERR_NOMEM; |
| 441 | goto end; |
| 442 | } |
| 443 | |
| 444 | ctrl_str = lttng_strndup(raw_ctrl_str, PATH_MAX); |
| 445 | if (!ctrl_str) { |
| 446 | ret = -LTTNG_ERR_NOMEM; |
| 447 | goto end; |
| 448 | } |
| 449 | |
| 450 | /* Get the data uri. */ |
| 451 | ret = uri_to_str_url(&uri[1], buffer, sizeof(buffer)); |
| 452 | if (ret < 0) { |
| 453 | ret = -LTTNG_ERR_INVALID; |
| 454 | goto end; |
| 455 | } |
| 456 | ret = 0; |
| 457 | |
| 458 | raw_data_str = lttng_strndup(buffer, PATH_MAX); |
| 459 | if (!raw_data_str) { |
| 460 | ret = -LTTNG_ERR_NOMEM; |
| 461 | goto end; |
| 462 | } |
| 463 | |
| 464 | data_str = lttng_strndup(raw_data_str, PATH_MAX); |
| 465 | if (!data_str) { |
| 466 | ret = -LTTNG_ERR_NOMEM; |
| 467 | goto end; |
| 468 | } |
| 469 | |
| 470 | break; |
| 471 | default: |
| 472 | ret = -LTTNG_ERR_INVALID; |
| 473 | goto end; |
| 474 | } |
| 475 | |
| 476 | reset_load_session_attr_urls(attr); |
| 477 | |
| 478 | attr->override_attr.path_url = path_str; |
| 479 | attr->override_attr.ctrl_url = ctrl_str; |
| 480 | attr->override_attr.data_url = data_str; |
| 481 | |
| 482 | attr->raw_override_url = raw_url_str; |
| 483 | attr->raw_override_path_url = raw_path_str; |
| 484 | attr->raw_override_ctrl_url = raw_ctrl_str; |
| 485 | attr->raw_override_data_url = raw_data_str; |
| 486 | |
| 487 | /* Pass data ownership to attr. */ |
| 488 | raw_url_str = NULL; |
| 489 | raw_path_str = NULL; |
| 490 | path_str = NULL; |
| 491 | raw_ctrl_str = NULL; |
| 492 | ctrl_str = NULL; |
| 493 | raw_data_str = NULL; |
| 494 | data_str = NULL; |
| 495 | |
| 496 | end: |
| 497 | free(raw_path_str); |
| 498 | free(path_str); |
| 499 | free(raw_ctrl_str); |
| 500 | free(ctrl_str); |
| 501 | free(raw_data_str); |
| 502 | free(data_str); |
| 503 | free(raw_url_str); |
| 504 | free(uri); |
| 505 | return ret; |
| 506 | } |
| 507 | /* |
| 508 | * The lttng-ctl API does not expose all the information needed to load the |
| 509 | * session configurations. Thus, we must send a load command to the session |
| 510 | * daemon which will, in turn, load its current session configuration. |
| 511 | */ |
| 512 | int lttng_load_session(struct lttng_load_session_attr *attr) |
| 513 | { |
| 514 | int ret; |
| 515 | const char *url, *session_name; |
| 516 | |
| 517 | if (!attr) { |
| 518 | ret = -LTTNG_ERR_INVALID; |
| 519 | goto end; |
| 520 | } |
| 521 | |
| 522 | url = attr->input_url[0] != '\0' ? attr->input_url : NULL; |
| 523 | session_name = attr->session_name[0] != '\0' ? |
| 524 | attr->session_name : NULL; |
| 525 | |
| 526 | ret = config_load_session(url, session_name, attr->overwrite, 0); |
| 527 | |
| 528 | end: |
| 529 | return ret; |
| 530 | } |