| 1 | /* |
| 2 | * Copyright (C) 2013 - Jérémie Galarneau <jeremie.galarneau@efficios.com> |
| 3 | * |
| 4 | * This program is free software; you can redistribute it and/or modify it |
| 5 | * under the terms of the GNU General Public License, version 2 only, as |
| 6 | * published by the Free Software Foundation. |
| 7 | * |
| 8 | * This program 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 General Public License for |
| 11 | * more details. |
| 12 | * |
| 13 | * You should have received a copy of the GNU General Public License along with |
| 14 | * this program; if not, write to the Free Software Foundation, Inc., 51 |
| 15 | * Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. |
| 16 | */ |
| 17 | |
| 18 | #define _LGPL_SOURCE |
| 19 | #include <assert.h> |
| 20 | #include <ctype.h> |
| 21 | #include <stdio.h> |
| 22 | #include <stdlib.h> |
| 23 | #include <string.h> |
| 24 | #include <inttypes.h> |
| 25 | #include <dirent.h> |
| 26 | #include <unistd.h> |
| 27 | #include <sys/types.h> |
| 28 | #include <sys/stat.h> |
| 29 | #include <stdbool.h> |
| 30 | |
| 31 | #include <common/defaults.h> |
| 32 | #include <common/error.h> |
| 33 | #include <common/macros.h> |
| 34 | #include <common/utils.h> |
| 35 | #include <common/compat/getenv.h> |
| 36 | #include <lttng/lttng-error.h> |
| 37 | #include <libxml/parser.h> |
| 38 | #include <libxml/valid.h> |
| 39 | #include <libxml/xmlschemas.h> |
| 40 | #include <libxml/tree.h> |
| 41 | #include <libxml/xpath.h> |
| 42 | #include <lttng/lttng.h> |
| 43 | #include <lttng/snapshot.h> |
| 44 | |
| 45 | #include "session-config.h" |
| 46 | #include "config-internal.h" |
| 47 | |
| 48 | struct handler_filter_args { |
| 49 | const char* section; |
| 50 | config_entry_handler_cb handler; |
| 51 | void *user_data; |
| 52 | }; |
| 53 | |
| 54 | struct session_config_validation_ctx { |
| 55 | xmlSchemaParserCtxtPtr parser_ctx; |
| 56 | xmlSchemaPtr schema; |
| 57 | xmlSchemaValidCtxtPtr schema_validation_ctx; |
| 58 | }; |
| 59 | |
| 60 | const char * const config_str_yes = "yes"; |
| 61 | const char * const config_str_true = "true"; |
| 62 | const char * const config_str_on = "on"; |
| 63 | const char * const config_str_no = "no"; |
| 64 | const char * const config_str_false = "false"; |
| 65 | const char * const config_str_off = "off"; |
| 66 | const char * const config_xml_encoding = "UTF-8"; |
| 67 | const size_t config_xml_encoding_bytes_per_char = 2; /* Size of the encoding's largest character */ |
| 68 | const char * const config_xml_indent_string = "\t"; |
| 69 | const char * const config_xml_true = "true"; |
| 70 | const char * const config_xml_false = "false"; |
| 71 | |
| 72 | const char * const config_element_channel = "channel"; |
| 73 | const char * const config_element_channels = "channels"; |
| 74 | const char * const config_element_domain = "domain"; |
| 75 | const char * const config_element_domains = "domains"; |
| 76 | const char * const config_element_event = "event"; |
| 77 | const char * const config_element_events = "events"; |
| 78 | const char * const config_element_context = "context"; |
| 79 | const char * const config_element_contexts = "contexts"; |
| 80 | const char * const config_element_attributes = "attributes"; |
| 81 | const char * const config_element_exclusion = "exclusion"; |
| 82 | const char * const config_element_exclusions = "exclusions"; |
| 83 | const char * const config_element_function_attributes = "function_attributes"; |
| 84 | const char * const config_element_probe_attributes = "probe_attributes"; |
| 85 | const char * const config_element_symbol_name = "symbol_name"; |
| 86 | const char * const config_element_address = "address"; |
| 87 | const char * const config_element_offset = "offset"; |
| 88 | const char * const config_element_name = "name"; |
| 89 | const char * const config_element_enabled = "enabled"; |
| 90 | const char * const config_element_overwrite_mode = "overwrite_mode"; |
| 91 | const char * const config_element_subbuf_size = "subbuffer_size"; |
| 92 | const char * const config_element_num_subbuf = "subbuffer_count"; |
| 93 | const char * const config_element_switch_timer_interval = "switch_timer_interval"; |
| 94 | const char * const config_element_read_timer_interval = "read_timer_interval"; |
| 95 | const char * const config_element_output = "output"; |
| 96 | const char * const config_element_output_type = "output_type"; |
| 97 | const char * const config_element_tracefile_size = "tracefile_size"; |
| 98 | const char * const config_element_tracefile_count = "tracefile_count"; |
| 99 | const char * const config_element_live_timer_interval = "live_timer_interval"; |
| 100 | LTTNG_HIDDEN const char * const config_element_discarded_events = "discarded_events"; |
| 101 | LTTNG_HIDDEN const char * const config_element_lost_packets = "lost_packets"; |
| 102 | const char * const config_element_type = "type"; |
| 103 | const char * const config_element_buffer_type = "buffer_type"; |
| 104 | const char * const config_element_session = "session"; |
| 105 | const char * const config_element_sessions = "sessions"; |
| 106 | LTTNG_HIDDEN const char * const config_element_context_perf = "perf"; |
| 107 | LTTNG_HIDDEN const char * const config_element_context_app = "app"; |
| 108 | LTTNG_HIDDEN const char * const config_element_context_app_provider_name = "provider_name"; |
| 109 | LTTNG_HIDDEN const char * const config_element_context_app_ctx_name = "ctx_name"; |
| 110 | const char * const config_element_config = "config"; |
| 111 | const char * const config_element_started = "started"; |
| 112 | const char * const config_element_snapshot_mode = "snapshot_mode"; |
| 113 | const char * const config_element_loglevel = "loglevel"; |
| 114 | const char * const config_element_loglevel_type = "loglevel_type"; |
| 115 | const char * const config_element_filter = "filter"; |
| 116 | LTTNG_HIDDEN const char * const config_element_filter_expression = "filter_expression"; |
| 117 | const char * const config_element_snapshot_outputs = "snapshot_outputs"; |
| 118 | const char * const config_element_consumer_output = "consumer_output"; |
| 119 | const char * const config_element_destination = "destination"; |
| 120 | const char * const config_element_path = "path"; |
| 121 | const char * const config_element_net_output = "net_output"; |
| 122 | const char * const config_element_control_uri = "control_uri"; |
| 123 | const char * const config_element_data_uri = "data_uri"; |
| 124 | const char * const config_element_max_size = "max_size"; |
| 125 | const char * const config_element_pid = "pid"; |
| 126 | const char * const config_element_pids = "pids"; |
| 127 | const char * const config_element_shared_memory_path = "shared_memory_path"; |
| 128 | const char * const config_element_pid_tracker = "pid_tracker"; |
| 129 | const char * const config_element_trackers = "trackers"; |
| 130 | const char * const config_element_targets = "targets"; |
| 131 | const char * const config_element_target_pid = "pid_target"; |
| 132 | const char * const config_element_omit_name = "omit_name"; |
| 133 | const char * const config_element_omit_output = "omit_output"; |
| 134 | |
| 135 | const char * const config_domain_type_kernel = "KERNEL"; |
| 136 | const char * const config_domain_type_ust = "UST"; |
| 137 | const char * const config_domain_type_jul = "JUL"; |
| 138 | const char * const config_domain_type_log4j = "LOG4J"; |
| 139 | const char * const config_domain_type_python = "PYTHON"; |
| 140 | |
| 141 | const char * const config_buffer_type_per_pid = "PER_PID"; |
| 142 | const char * const config_buffer_type_per_uid = "PER_UID"; |
| 143 | const char * const config_buffer_type_global = "GLOBAL"; |
| 144 | |
| 145 | const char * const config_overwrite_mode_discard = "DISCARD"; |
| 146 | const char * const config_overwrite_mode_overwrite = "OVERWRITE"; |
| 147 | |
| 148 | const char * const config_output_type_splice = "SPLICE"; |
| 149 | const char * const config_output_type_mmap = "MMAP"; |
| 150 | |
| 151 | const char * const config_loglevel_type_all = "ALL"; |
| 152 | const char * const config_loglevel_type_range = "RANGE"; |
| 153 | const char * const config_loglevel_type_single = "SINGLE"; |
| 154 | |
| 155 | const char * const config_event_type_all = "ALL"; |
| 156 | const char * const config_event_type_tracepoint = "TRACEPOINT"; |
| 157 | const char * const config_event_type_probe = "PROBE"; |
| 158 | const char * const config_event_type_function = "FUNCTION"; |
| 159 | const char * const config_event_type_function_entry = "FUNCTION_ENTRY"; |
| 160 | const char * const config_event_type_noop = "NOOP"; |
| 161 | const char * const config_event_type_syscall = "SYSCALL"; |
| 162 | const char * const config_event_type_kprobe = "KPROBE"; |
| 163 | const char * const config_event_type_kretprobe = "KRETPROBE"; |
| 164 | |
| 165 | const char * const config_event_context_pid = "PID"; |
| 166 | const char * const config_event_context_procname = "PROCNAME"; |
| 167 | const char * const config_event_context_prio = "PRIO"; |
| 168 | const char * const config_event_context_nice = "NICE"; |
| 169 | const char * const config_event_context_vpid = "VPID"; |
| 170 | const char * const config_event_context_tid = "TID"; |
| 171 | const char * const config_event_context_vtid = "VTID"; |
| 172 | const char * const config_event_context_ppid = "PPID"; |
| 173 | const char * const config_event_context_vppid = "VPPID"; |
| 174 | const char * const config_event_context_pthread_id = "PTHREAD_ID"; |
| 175 | const char * const config_event_context_hostname = "HOSTNAME"; |
| 176 | const char * const config_event_context_ip = "IP"; |
| 177 | const char * const config_event_context_perf_thread_counter = "PERF_THREAD_COUNTER"; |
| 178 | LTTNG_HIDDEN const char * const config_event_context_app = "APP"; |
| 179 | LTTNG_HIDDEN const char * const config_event_context_interruptible = "INTERRUPTIBLE"; |
| 180 | LTTNG_HIDDEN const char * const config_event_context_preemptible = "PREEMPTIBLE"; |
| 181 | LTTNG_HIDDEN const char * const config_event_context_need_reschedule = "NEED_RESCHEDULE"; |
| 182 | LTTNG_HIDDEN const char * const config_event_context_migratable = "MIGRATABLE"; |
| 183 | |
| 184 | /* Deprecated symbols */ |
| 185 | const char * const config_element_perf; |
| 186 | |
| 187 | enum process_event_node_phase { |
| 188 | CREATION = 0, |
| 189 | ENABLE = 1, |
| 190 | }; |
| 191 | |
| 192 | struct consumer_output { |
| 193 | int enabled; |
| 194 | char *path; |
| 195 | char *control_uri; |
| 196 | char *data_uri; |
| 197 | }; |
| 198 | |
| 199 | static int config_entry_handler_filter(struct handler_filter_args *args, |
| 200 | const char *section, const char *name, const char *value) |
| 201 | { |
| 202 | int ret = 0; |
| 203 | struct config_entry entry = { section, name, value }; |
| 204 | |
| 205 | assert(args); |
| 206 | |
| 207 | if (!section || !name || !value) { |
| 208 | ret = -EIO; |
| 209 | goto end; |
| 210 | } |
| 211 | |
| 212 | if (args->section) { |
| 213 | if (strcmp(args->section, section)) { |
| 214 | goto end; |
| 215 | } |
| 216 | } |
| 217 | |
| 218 | ret = args->handler(&entry, args->user_data); |
| 219 | end: |
| 220 | return ret; |
| 221 | } |
| 222 | |
| 223 | LTTNG_HIDDEN |
| 224 | const char *config_get_domain_str(enum lttng_domain_type domain) |
| 225 | { |
| 226 | const char *str_dom; |
| 227 | |
| 228 | switch (domain) { |
| 229 | case LTTNG_DOMAIN_KERNEL: |
| 230 | str_dom = config_domain_type_kernel; |
| 231 | break; |
| 232 | case LTTNG_DOMAIN_UST: |
| 233 | str_dom = config_domain_type_ust; |
| 234 | break; |
| 235 | case LTTNG_DOMAIN_JUL: |
| 236 | str_dom = config_domain_type_jul; |
| 237 | break; |
| 238 | case LTTNG_DOMAIN_LOG4J: |
| 239 | str_dom = config_domain_type_log4j; |
| 240 | break; |
| 241 | case LTTNG_DOMAIN_PYTHON: |
| 242 | str_dom = config_domain_type_python; |
| 243 | break; |
| 244 | default: |
| 245 | assert(0); |
| 246 | } |
| 247 | |
| 248 | return str_dom; |
| 249 | } |
| 250 | |
| 251 | LTTNG_HIDDEN |
| 252 | const char *config_get_loglevel_type_string( |
| 253 | enum lttng_loglevel_type loglevel_type) |
| 254 | { |
| 255 | const char *loglevel_type_string; |
| 256 | |
| 257 | switch (loglevel_type) { |
| 258 | case LTTNG_EVENT_LOGLEVEL_ALL: |
| 259 | loglevel_type_string = config_loglevel_type_all; |
| 260 | break; |
| 261 | case LTTNG_EVENT_LOGLEVEL_RANGE: |
| 262 | loglevel_type_string = config_loglevel_type_range; |
| 263 | break; |
| 264 | case LTTNG_EVENT_LOGLEVEL_SINGLE: |
| 265 | loglevel_type_string = config_loglevel_type_single; |
| 266 | break; |
| 267 | default: |
| 268 | loglevel_type_string = NULL; |
| 269 | } |
| 270 | |
| 271 | return loglevel_type_string; |
| 272 | } |
| 273 | |
| 274 | LTTNG_HIDDEN |
| 275 | int config_get_section_entries(const char *override_path, const char *section, |
| 276 | config_entry_handler_cb handler, void *user_data) |
| 277 | { |
| 278 | int ret = 0; |
| 279 | char *path; |
| 280 | FILE *config_file = NULL; |
| 281 | struct handler_filter_args filter = { section, handler, user_data }; |
| 282 | |
| 283 | /* First, try system-wide conf. file. */ |
| 284 | path = DEFAULT_DAEMON_SYSTEM_CONFIGPATH; |
| 285 | |
| 286 | config_file = fopen(path, "r"); |
| 287 | if (config_file) { |
| 288 | DBG("Loading daemon conf file at %s", path); |
| 289 | /* |
| 290 | * Return value is not very important here since error or not, we |
| 291 | * continue and try the next possible conf. file. |
| 292 | */ |
| 293 | (void) ini_parse_file(config_file, |
| 294 | (ini_entry_handler) config_entry_handler_filter, |
| 295 | (void *) &filter); |
| 296 | fclose(config_file); |
| 297 | } |
| 298 | |
| 299 | /* Second is the user local configuration. */ |
| 300 | path = utils_get_home_dir(); |
| 301 | if (path) { |
| 302 | char fullpath[PATH_MAX]; |
| 303 | |
| 304 | ret = snprintf(fullpath, sizeof(fullpath), |
| 305 | DEFAULT_DAEMON_HOME_CONFIGPATH, path); |
| 306 | if (ret < 0) { |
| 307 | PERROR("snprintf user conf. path"); |
| 308 | goto error; |
| 309 | } |
| 310 | |
| 311 | config_file = fopen(fullpath, "r"); |
| 312 | if (config_file) { |
| 313 | DBG("Loading daemon user conf file at %s", path); |
| 314 | /* |
| 315 | * Return value is not very important here since error or not, we |
| 316 | * continue and try the next possible conf. file. |
| 317 | */ |
| 318 | (void) ini_parse_file(config_file, |
| 319 | (ini_entry_handler) config_entry_handler_filter, |
| 320 | (void *) &filter); |
| 321 | fclose(config_file); |
| 322 | } |
| 323 | } |
| 324 | |
| 325 | /* Final path is the one that the user might have provided. */ |
| 326 | if (override_path) { |
| 327 | config_file = fopen(override_path, "r"); |
| 328 | if (config_file) { |
| 329 | DBG("Loading daemon command line conf file at %s", override_path); |
| 330 | (void) ini_parse_file(config_file, |
| 331 | (ini_entry_handler) config_entry_handler_filter, |
| 332 | (void *) &filter); |
| 333 | fclose(config_file); |
| 334 | } else { |
| 335 | ERR("Failed to open daemon configuration file at %s", |
| 336 | override_path); |
| 337 | ret = -ENOENT; |
| 338 | goto error; |
| 339 | } |
| 340 | } |
| 341 | |
| 342 | /* Everything went well. */ |
| 343 | ret = 0; |
| 344 | |
| 345 | error: |
| 346 | return ret; |
| 347 | } |
| 348 | |
| 349 | LTTNG_HIDDEN |
| 350 | int config_parse_value(const char *value) |
| 351 | { |
| 352 | int i, ret = 0; |
| 353 | char *endptr, *lower_str; |
| 354 | size_t len; |
| 355 | unsigned long v; |
| 356 | |
| 357 | len = strlen(value); |
| 358 | if (!len) { |
| 359 | ret = -1; |
| 360 | goto end; |
| 361 | } |
| 362 | |
| 363 | v = strtoul(value, &endptr, 10); |
| 364 | if (endptr != value) { |
| 365 | ret = v; |
| 366 | goto end; |
| 367 | } |
| 368 | |
| 369 | lower_str = zmalloc(len + 1); |
| 370 | if (!lower_str) { |
| 371 | PERROR("zmalloc"); |
| 372 | ret = -errno; |
| 373 | goto end; |
| 374 | } |
| 375 | |
| 376 | for (i = 0; i < len; i++) { |
| 377 | lower_str[i] = tolower(value[i]); |
| 378 | } |
| 379 | |
| 380 | if (!strcmp(lower_str, config_str_yes) || |
| 381 | !strcmp(lower_str, config_str_true) || |
| 382 | !strcmp(lower_str, config_str_on)) { |
| 383 | ret = 1; |
| 384 | } else if (!strcmp(lower_str, config_str_no) || |
| 385 | !strcmp(lower_str, config_str_false) || |
| 386 | !strcmp(lower_str, config_str_off)) { |
| 387 | ret = 0; |
| 388 | } else { |
| 389 | ret = -1; |
| 390 | } |
| 391 | |
| 392 | free(lower_str); |
| 393 | end: |
| 394 | return ret; |
| 395 | } |
| 396 | |
| 397 | /* |
| 398 | * Returns a xmlChar string which must be released using xmlFree(). |
| 399 | */ |
| 400 | static xmlChar *encode_string(const char *in_str) |
| 401 | { |
| 402 | xmlChar *out_str = NULL; |
| 403 | xmlCharEncodingHandlerPtr handler; |
| 404 | int out_len, ret, in_len; |
| 405 | |
| 406 | assert(in_str); |
| 407 | |
| 408 | handler = xmlFindCharEncodingHandler(config_xml_encoding); |
| 409 | if (!handler) { |
| 410 | ERR("xmlFindCharEncodingHandler return NULL!. Configure issue!"); |
| 411 | goto end; |
| 412 | } |
| 413 | |
| 414 | in_len = strlen(in_str); |
| 415 | /* |
| 416 | * Add 1 byte for the NULL terminted character. The factor 4 here is |
| 417 | * used because UTF-8 characters can take up to 4 bytes. |
| 418 | */ |
| 419 | out_len = (in_len * 4) + 1; |
| 420 | out_str = xmlMalloc(out_len); |
| 421 | if (!out_str) { |
| 422 | goto end; |
| 423 | } |
| 424 | |
| 425 | ret = handler->input(out_str, &out_len, (const xmlChar *) in_str, &in_len); |
| 426 | if (ret < 0) { |
| 427 | xmlFree(out_str); |
| 428 | out_str = NULL; |
| 429 | goto end; |
| 430 | } |
| 431 | |
| 432 | /* out_len is now the size of out_str */ |
| 433 | out_str[out_len] = '\0'; |
| 434 | end: |
| 435 | return out_str; |
| 436 | } |
| 437 | |
| 438 | LTTNG_HIDDEN |
| 439 | struct config_writer *config_writer_create(int fd_output, int indent) |
| 440 | { |
| 441 | int ret; |
| 442 | struct config_writer *writer; |
| 443 | xmlOutputBufferPtr buffer; |
| 444 | |
| 445 | writer = zmalloc(sizeof(struct config_writer)); |
| 446 | if (!writer) { |
| 447 | PERROR("zmalloc config_writer_create"); |
| 448 | goto end; |
| 449 | } |
| 450 | |
| 451 | buffer = xmlOutputBufferCreateFd(fd_output, NULL); |
| 452 | if (!buffer) { |
| 453 | goto error_destroy; |
| 454 | } |
| 455 | |
| 456 | writer->writer = xmlNewTextWriter(buffer); |
| 457 | ret = xmlTextWriterStartDocument(writer->writer, NULL, |
| 458 | config_xml_encoding, NULL); |
| 459 | if (ret < 0) { |
| 460 | goto error_destroy; |
| 461 | } |
| 462 | |
| 463 | ret = xmlTextWriterSetIndentString(writer->writer, |
| 464 | BAD_CAST config_xml_indent_string); |
| 465 | if (ret) { |
| 466 | goto error_destroy; |
| 467 | } |
| 468 | |
| 469 | ret = xmlTextWriterSetIndent(writer->writer, indent); |
| 470 | if (ret) { |
| 471 | goto error_destroy; |
| 472 | } |
| 473 | |
| 474 | end: |
| 475 | return writer; |
| 476 | error_destroy: |
| 477 | config_writer_destroy(writer); |
| 478 | return NULL; |
| 479 | } |
| 480 | |
| 481 | LTTNG_HIDDEN |
| 482 | int config_writer_destroy(struct config_writer *writer) |
| 483 | { |
| 484 | int ret = 0; |
| 485 | |
| 486 | if (!writer) { |
| 487 | ret = -EINVAL; |
| 488 | goto end; |
| 489 | } |
| 490 | |
| 491 | if (xmlTextWriterEndDocument(writer->writer) < 0) { |
| 492 | WARN("Could not close XML document"); |
| 493 | ret = -EIO; |
| 494 | } |
| 495 | |
| 496 | if (writer->writer) { |
| 497 | xmlFreeTextWriter(writer->writer); |
| 498 | } |
| 499 | |
| 500 | free(writer); |
| 501 | end: |
| 502 | return ret; |
| 503 | } |
| 504 | |
| 505 | LTTNG_HIDDEN |
| 506 | int config_writer_open_element(struct config_writer *writer, |
| 507 | const char *element_name) |
| 508 | { |
| 509 | int ret; |
| 510 | xmlChar *encoded_element_name; |
| 511 | |
| 512 | if (!writer || !writer->writer || !element_name || !element_name[0]) { |
| 513 | ret = -1; |
| 514 | goto end; |
| 515 | } |
| 516 | |
| 517 | encoded_element_name = encode_string(element_name); |
| 518 | if (!encoded_element_name) { |
| 519 | ret = -1; |
| 520 | goto end; |
| 521 | } |
| 522 | |
| 523 | ret = xmlTextWriterStartElement(writer->writer, encoded_element_name); |
| 524 | xmlFree(encoded_element_name); |
| 525 | end: |
| 526 | return ret >= 0 ? 0 : ret; |
| 527 | } |
| 528 | |
| 529 | LTTNG_HIDDEN |
| 530 | int config_writer_write_attribute(struct config_writer *writer, |
| 531 | const char *name, const char *value) |
| 532 | { |
| 533 | int ret; |
| 534 | xmlChar *encoded_name = NULL; |
| 535 | xmlChar *encoded_value = NULL; |
| 536 | |
| 537 | if (!writer || !writer->writer || !name || !name[0]) { |
| 538 | ret = -1; |
| 539 | goto end; |
| 540 | } |
| 541 | |
| 542 | encoded_name = encode_string(name); |
| 543 | if (!encoded_name) { |
| 544 | ret = -1; |
| 545 | goto end; |
| 546 | } |
| 547 | |
| 548 | encoded_value = encode_string(value); |
| 549 | if (!encoded_value) { |
| 550 | ret = -1; |
| 551 | goto end; |
| 552 | } |
| 553 | |
| 554 | ret = xmlTextWriterWriteAttribute(writer->writer, encoded_name, |
| 555 | encoded_value); |
| 556 | end: |
| 557 | xmlFree(encoded_name); |
| 558 | xmlFree(encoded_value); |
| 559 | return ret >= 0 ? 0 : ret; |
| 560 | } |
| 561 | |
| 562 | LTTNG_HIDDEN |
| 563 | int config_writer_close_element(struct config_writer *writer) |
| 564 | { |
| 565 | int ret; |
| 566 | |
| 567 | if (!writer || !writer->writer) { |
| 568 | ret = -1; |
| 569 | goto end; |
| 570 | } |
| 571 | |
| 572 | ret = xmlTextWriterEndElement(writer->writer); |
| 573 | end: |
| 574 | return ret >= 0 ? 0 : ret; |
| 575 | } |
| 576 | |
| 577 | LTTNG_HIDDEN |
| 578 | int config_writer_write_element_unsigned_int(struct config_writer *writer, |
| 579 | const char *element_name, uint64_t value) |
| 580 | { |
| 581 | int ret; |
| 582 | xmlChar *encoded_element_name; |
| 583 | |
| 584 | if (!writer || !writer->writer || !element_name || !element_name[0]) { |
| 585 | ret = -1; |
| 586 | goto end; |
| 587 | } |
| 588 | |
| 589 | encoded_element_name = encode_string(element_name); |
| 590 | if (!encoded_element_name) { |
| 591 | ret = -1; |
| 592 | goto end; |
| 593 | } |
| 594 | |
| 595 | ret = xmlTextWriterWriteFormatElement(writer->writer, |
| 596 | encoded_element_name, "%" PRIu64, value); |
| 597 | xmlFree(encoded_element_name); |
| 598 | end: |
| 599 | return ret >= 0 ? 0 : ret; |
| 600 | } |
| 601 | |
| 602 | LTTNG_HIDDEN |
| 603 | int config_writer_write_element_signed_int(struct config_writer *writer, |
| 604 | const char *element_name, int64_t value) |
| 605 | { |
| 606 | int ret; |
| 607 | xmlChar *encoded_element_name; |
| 608 | |
| 609 | if (!writer || !writer->writer || !element_name || !element_name[0]) { |
| 610 | ret = -1; |
| 611 | goto end; |
| 612 | } |
| 613 | |
| 614 | encoded_element_name = encode_string(element_name); |
| 615 | if (!encoded_element_name) { |
| 616 | ret = -1; |
| 617 | goto end; |
| 618 | } |
| 619 | |
| 620 | ret = xmlTextWriterWriteFormatElement(writer->writer, |
| 621 | encoded_element_name, "%" PRIi64, value); |
| 622 | xmlFree(encoded_element_name); |
| 623 | end: |
| 624 | return ret >= 0 ? 0 : ret; |
| 625 | } |
| 626 | |
| 627 | LTTNG_HIDDEN |
| 628 | int config_writer_write_element_bool(struct config_writer *writer, |
| 629 | const char *element_name, int value) |
| 630 | { |
| 631 | return config_writer_write_element_string(writer, element_name, |
| 632 | value ? config_xml_true : config_xml_false); |
| 633 | } |
| 634 | |
| 635 | LTTNG_HIDDEN |
| 636 | int config_writer_write_element_string(struct config_writer *writer, |
| 637 | const char *element_name, const char *value) |
| 638 | { |
| 639 | int ret; |
| 640 | xmlChar *encoded_element_name = NULL; |
| 641 | xmlChar *encoded_value = NULL; |
| 642 | |
| 643 | if (!writer || !writer->writer || !element_name || !element_name[0] || |
| 644 | !value) { |
| 645 | ret = -1; |
| 646 | goto end; |
| 647 | } |
| 648 | |
| 649 | encoded_element_name = encode_string(element_name); |
| 650 | if (!encoded_element_name) { |
| 651 | ret = -1; |
| 652 | goto end; |
| 653 | } |
| 654 | |
| 655 | encoded_value = encode_string(value); |
| 656 | if (!encoded_value) { |
| 657 | ret = -1; |
| 658 | goto end; |
| 659 | } |
| 660 | |
| 661 | ret = xmlTextWriterWriteElement(writer->writer, encoded_element_name, |
| 662 | encoded_value); |
| 663 | end: |
| 664 | xmlFree(encoded_element_name); |
| 665 | xmlFree(encoded_value); |
| 666 | return ret >= 0 ? 0 : ret; |
| 667 | } |
| 668 | |
| 669 | LTTNG_HIDDEN |
| 670 | int config_writer_write_config_element(struct config_writer *writer, |
| 671 | const struct config_element *element) |
| 672 | { |
| 673 | int ret = 0; |
| 674 | |
| 675 | xmlNodePtr local_copy = NULL; |
| 676 | xmlNodePtr place_holder = NULL; |
| 677 | xmlDocPtr document = NULL; |
| 678 | xmlBufferPtr buffer = NULL; |
| 679 | |
| 680 | assert(element); |
| 681 | assert(element->element); |
| 682 | assert(writer); |
| 683 | |
| 684 | /* Create a new doc and set root node as passed element */ |
| 685 | document = xmlNewDoc(BAD_CAST "1.0"); |
| 686 | document->parseFlags |= XML_PARSE_NOBLANKS; |
| 687 | if (!document) { |
| 688 | ERR("Unable to create xml document"); |
| 689 | ret = -1; |
| 690 | goto end; |
| 691 | } |
| 692 | |
| 693 | local_copy = xmlCopyNode(element->element, 1); |
| 694 | if (!local_copy) { |
| 695 | ERR("Unable to copy an xml node"); |
| 696 | ret = -1; |
| 697 | goto end; |
| 698 | } |
| 699 | |
| 700 | /* Hand off the local_copy to the xmlDoc */ |
| 701 | place_holder = xmlDocSetRootElement(document, local_copy); |
| 702 | if (place_holder) { |
| 703 | ERR("The document root was already set"); |
| 704 | xmlFreeNode(local_copy); |
| 705 | ret = -1; |
| 706 | goto end; |
| 707 | } |
| 708 | |
| 709 | buffer = xmlBufferCreate(); |
| 710 | if (!buffer) { |
| 711 | ret = -1; |
| 712 | goto end; |
| 713 | } |
| 714 | |
| 715 | ret = xmlNodeDump(buffer, document, local_copy, 0, 0); |
| 716 | xmlTextWriterWriteRaw(writer->writer, xmlBufferContent(buffer)); |
| 717 | end: |
| 718 | xmlBufferFree(buffer); |
| 719 | xmlFreeDoc(document); |
| 720 | return ret; |
| 721 | } |
| 722 | |
| 723 | static |
| 724 | void xml_error_handler(void *ctx, const char *format, ...) |
| 725 | { |
| 726 | char *errMsg; |
| 727 | va_list args; |
| 728 | int ret; |
| 729 | |
| 730 | va_start(args, format); |
| 731 | ret = vasprintf(&errMsg, format, args); |
| 732 | va_end(args); |
| 733 | if (ret == -1) { |
| 734 | ERR("String allocation failed in xml error handler"); |
| 735 | return; |
| 736 | } |
| 737 | |
| 738 | fprintf(stderr, "XML Error: %s", errMsg); |
| 739 | free(errMsg); |
| 740 | } |
| 741 | |
| 742 | static |
| 743 | void fini_session_config_validation_ctx( |
| 744 | struct session_config_validation_ctx *ctx) |
| 745 | { |
| 746 | if (ctx->parser_ctx) { |
| 747 | xmlSchemaFreeParserCtxt(ctx->parser_ctx); |
| 748 | } |
| 749 | |
| 750 | if (ctx->schema) { |
| 751 | xmlSchemaFree(ctx->schema); |
| 752 | } |
| 753 | |
| 754 | if (ctx->schema_validation_ctx) { |
| 755 | xmlSchemaFreeValidCtxt(ctx->schema_validation_ctx); |
| 756 | } |
| 757 | |
| 758 | memset(ctx, 0, sizeof(struct session_config_validation_ctx)); |
| 759 | } |
| 760 | |
| 761 | static |
| 762 | char *get_session_config_xsd_path() |
| 763 | { |
| 764 | char *xsd_path; |
| 765 | const char *base_path = lttng_secure_getenv(DEFAULT_SESSION_CONFIG_XSD_PATH_ENV); |
| 766 | size_t base_path_len; |
| 767 | size_t max_path_len; |
| 768 | |
| 769 | if (!base_path) { |
| 770 | base_path = DEFAULT_SESSION_CONFIG_XSD_PATH; |
| 771 | } |
| 772 | |
| 773 | base_path_len = strlen(base_path); |
| 774 | max_path_len = base_path_len + |
| 775 | sizeof(DEFAULT_SESSION_CONFIG_XSD_FILENAME) + 1; |
| 776 | xsd_path = zmalloc(max_path_len); |
| 777 | if (!xsd_path) { |
| 778 | goto end; |
| 779 | } |
| 780 | |
| 781 | strncpy(xsd_path, base_path, max_path_len); |
| 782 | if (xsd_path[base_path_len - 1] != '/') { |
| 783 | xsd_path[base_path_len++] = '/'; |
| 784 | } |
| 785 | |
| 786 | strncpy(xsd_path + base_path_len, DEFAULT_SESSION_CONFIG_XSD_FILENAME, |
| 787 | max_path_len - base_path_len); |
| 788 | end: |
| 789 | return xsd_path; |
| 790 | } |
| 791 | |
| 792 | static |
| 793 | int init_session_config_validation_ctx( |
| 794 | struct session_config_validation_ctx *ctx) |
| 795 | { |
| 796 | int ret; |
| 797 | char *xsd_path = get_session_config_xsd_path(); |
| 798 | |
| 799 | if (!xsd_path) { |
| 800 | ret = -LTTNG_ERR_NOMEM; |
| 801 | goto end; |
| 802 | } |
| 803 | |
| 804 | ctx->parser_ctx = xmlSchemaNewParserCtxt(xsd_path); |
| 805 | if (!ctx->parser_ctx) { |
| 806 | ERR("XSD parser context creation failed"); |
| 807 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; |
| 808 | goto end; |
| 809 | } |
| 810 | xmlSchemaSetParserErrors(ctx->parser_ctx, xml_error_handler, |
| 811 | xml_error_handler, NULL); |
| 812 | |
| 813 | ctx->schema = xmlSchemaParse(ctx->parser_ctx); |
| 814 | if (!ctx->schema) { |
| 815 | ERR("XSD parsing failed"); |
| 816 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; |
| 817 | goto end; |
| 818 | } |
| 819 | |
| 820 | ctx->schema_validation_ctx = xmlSchemaNewValidCtxt(ctx->schema); |
| 821 | if (!ctx->schema_validation_ctx) { |
| 822 | ERR("XSD validation context creation failed"); |
| 823 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; |
| 824 | goto end; |
| 825 | } |
| 826 | |
| 827 | xmlSchemaSetValidErrors(ctx->schema_validation_ctx, xml_error_handler, |
| 828 | xml_error_handler, NULL); |
| 829 | ret = 0; |
| 830 | |
| 831 | end: |
| 832 | if (ret) { |
| 833 | fini_session_config_validation_ctx(ctx); |
| 834 | } |
| 835 | |
| 836 | free(xsd_path); |
| 837 | return ret; |
| 838 | } |
| 839 | |
| 840 | static |
| 841 | int parse_uint(xmlChar *str, uint64_t *val) |
| 842 | { |
| 843 | int ret; |
| 844 | char *endptr; |
| 845 | |
| 846 | if (!str || !val) { |
| 847 | ret = -1; |
| 848 | goto end; |
| 849 | } |
| 850 | |
| 851 | *val = strtoull((const char *) str, &endptr, 10); |
| 852 | if (!endptr || *endptr) { |
| 853 | ret = -1; |
| 854 | } else { |
| 855 | ret = 0; |
| 856 | } |
| 857 | |
| 858 | end: |
| 859 | return ret; |
| 860 | } |
| 861 | |
| 862 | static |
| 863 | int parse_int(xmlChar *str, int64_t *val) |
| 864 | { |
| 865 | int ret; |
| 866 | char *endptr; |
| 867 | |
| 868 | if (!str || !val) { |
| 869 | ret = -1; |
| 870 | goto end; |
| 871 | } |
| 872 | |
| 873 | *val = strtoll((const char *) str, &endptr, 10); |
| 874 | if (!endptr || *endptr) { |
| 875 | ret = -1; |
| 876 | } else { |
| 877 | ret = 0; |
| 878 | } |
| 879 | |
| 880 | end: |
| 881 | return ret; |
| 882 | } |
| 883 | |
| 884 | static |
| 885 | int parse_bool(xmlChar *str, int *val) |
| 886 | { |
| 887 | int ret = 0; |
| 888 | |
| 889 | if (!str || !val) { |
| 890 | ret = -1; |
| 891 | goto end; |
| 892 | } |
| 893 | |
| 894 | if (!strcmp((const char *) str, config_xml_true)) { |
| 895 | *val = 1; |
| 896 | } else if (!strcmp((const char *) str, config_xml_false)) { |
| 897 | *val = 0; |
| 898 | } else { |
| 899 | WARN("Invalid boolean value encoutered (%s).", |
| 900 | (const char *) str); |
| 901 | ret = -1; |
| 902 | } |
| 903 | end: |
| 904 | return ret; |
| 905 | } |
| 906 | |
| 907 | static |
| 908 | int get_domain_type(xmlChar *domain) |
| 909 | { |
| 910 | int ret; |
| 911 | |
| 912 | if (!domain) { |
| 913 | goto error; |
| 914 | } |
| 915 | |
| 916 | if (!strcmp((char *) domain, config_domain_type_kernel)) { |
| 917 | ret = LTTNG_DOMAIN_KERNEL; |
| 918 | } else if (!strcmp((char *) domain, config_domain_type_ust)) { |
| 919 | ret = LTTNG_DOMAIN_UST; |
| 920 | } else if (!strcmp((char *) domain, config_domain_type_jul)) { |
| 921 | ret = LTTNG_DOMAIN_JUL; |
| 922 | } else if (!strcmp((char *) domain, config_domain_type_log4j)) { |
| 923 | ret = LTTNG_DOMAIN_LOG4J; |
| 924 | } else if (!strcmp((char *) domain, config_domain_type_python)) { |
| 925 | ret = LTTNG_DOMAIN_PYTHON; |
| 926 | } else { |
| 927 | goto error; |
| 928 | } |
| 929 | |
| 930 | return ret; |
| 931 | error: |
| 932 | return -1; |
| 933 | } |
| 934 | |
| 935 | static |
| 936 | int get_buffer_type(xmlChar *buffer_type) |
| 937 | { |
| 938 | int ret; |
| 939 | |
| 940 | if (!buffer_type) { |
| 941 | goto error; |
| 942 | } |
| 943 | |
| 944 | if (!strcmp((char *) buffer_type, config_buffer_type_global)) { |
| 945 | ret = LTTNG_BUFFER_GLOBAL; |
| 946 | } else if (!strcmp((char *) buffer_type, config_buffer_type_per_uid)) { |
| 947 | ret = LTTNG_BUFFER_PER_UID; |
| 948 | } else if (!strcmp((char *) buffer_type, config_buffer_type_per_pid)) { |
| 949 | ret = LTTNG_BUFFER_PER_PID; |
| 950 | } else { |
| 951 | goto error; |
| 952 | } |
| 953 | |
| 954 | return ret; |
| 955 | error: |
| 956 | return -1; |
| 957 | } |
| 958 | |
| 959 | static |
| 960 | int get_overwrite_mode(xmlChar *overwrite_mode) |
| 961 | { |
| 962 | int ret; |
| 963 | |
| 964 | if (!overwrite_mode) { |
| 965 | goto error; |
| 966 | } |
| 967 | |
| 968 | if (!strcmp((char *) overwrite_mode, config_overwrite_mode_overwrite)) { |
| 969 | ret = 1; |
| 970 | } else if (!strcmp((char *) overwrite_mode, |
| 971 | config_overwrite_mode_discard)) { |
| 972 | ret = 0; |
| 973 | } else { |
| 974 | goto error; |
| 975 | } |
| 976 | |
| 977 | return ret; |
| 978 | error: |
| 979 | return -1; |
| 980 | } |
| 981 | |
| 982 | static |
| 983 | int get_output_type(xmlChar *output_type) |
| 984 | { |
| 985 | int ret; |
| 986 | |
| 987 | if (!output_type) { |
| 988 | goto error; |
| 989 | } |
| 990 | |
| 991 | if (!strcmp((char *) output_type, config_output_type_mmap)) { |
| 992 | ret = LTTNG_EVENT_MMAP; |
| 993 | } else if (!strcmp((char *) output_type, config_output_type_splice)) { |
| 994 | ret = LTTNG_EVENT_SPLICE; |
| 995 | } else { |
| 996 | goto error; |
| 997 | } |
| 998 | |
| 999 | return ret; |
| 1000 | error: |
| 1001 | return -1; |
| 1002 | } |
| 1003 | |
| 1004 | LTTNG_HIDDEN |
| 1005 | int config_get_event_type(const char *event_type) |
| 1006 | { |
| 1007 | int ret; |
| 1008 | |
| 1009 | if (!event_type) { |
| 1010 | goto error; |
| 1011 | } |
| 1012 | |
| 1013 | if (!strcmp(event_type, config_event_type_all)) { |
| 1014 | ret = LTTNG_EVENT_ALL; |
| 1015 | } else if (!strcmp(event_type, config_event_type_tracepoint)) { |
| 1016 | ret = LTTNG_EVENT_TRACEPOINT; |
| 1017 | } else if (!strcmp(event_type, config_event_type_probe)) { |
| 1018 | ret = LTTNG_EVENT_PROBE; |
| 1019 | } else if (!strcmp(event_type, config_event_type_function)) { |
| 1020 | ret = LTTNG_EVENT_FUNCTION; |
| 1021 | } else if (!strcmp(event_type, |
| 1022 | config_event_type_function_entry)) { |
| 1023 | ret = LTTNG_EVENT_FUNCTION_ENTRY; |
| 1024 | } else if (!strcmp(event_type, config_event_type_noop)) { |
| 1025 | ret = LTTNG_EVENT_NOOP; |
| 1026 | } else if (!strcmp(event_type, config_event_type_syscall)) { |
| 1027 | ret = LTTNG_EVENT_SYSCALL; |
| 1028 | } else { |
| 1029 | goto error; |
| 1030 | } |
| 1031 | |
| 1032 | return ret; |
| 1033 | error: |
| 1034 | return -1; |
| 1035 | } |
| 1036 | |
| 1037 | static |
| 1038 | int get_loglevel_type(xmlChar *loglevel_type) |
| 1039 | { |
| 1040 | int ret; |
| 1041 | |
| 1042 | if (!loglevel_type) { |
| 1043 | goto error; |
| 1044 | } |
| 1045 | |
| 1046 | if (!strcmp((char *) loglevel_type, config_loglevel_type_all)) { |
| 1047 | ret = LTTNG_EVENT_LOGLEVEL_ALL; |
| 1048 | } else if (!strcmp((char *) loglevel_type, |
| 1049 | config_loglevel_type_range)) { |
| 1050 | ret = LTTNG_EVENT_LOGLEVEL_RANGE; |
| 1051 | } else if (!strcmp((char *) loglevel_type, |
| 1052 | config_loglevel_type_single)) { |
| 1053 | ret = LTTNG_EVENT_LOGLEVEL_SINGLE; |
| 1054 | } else { |
| 1055 | goto error; |
| 1056 | } |
| 1057 | |
| 1058 | return ret; |
| 1059 | error: |
| 1060 | return -1; |
| 1061 | } |
| 1062 | |
| 1063 | /* |
| 1064 | * Return the context type or -1 on error. |
| 1065 | */ |
| 1066 | static |
| 1067 | int get_context_type(xmlChar *context_type) |
| 1068 | { |
| 1069 | int ret; |
| 1070 | |
| 1071 | if (!context_type) { |
| 1072 | goto error; |
| 1073 | } |
| 1074 | |
| 1075 | if (!strcmp((char *) context_type, config_event_context_pid)) { |
| 1076 | ret = LTTNG_EVENT_CONTEXT_PID; |
| 1077 | } else if (!strcmp((char *) context_type, |
| 1078 | config_event_context_procname)) { |
| 1079 | ret = LTTNG_EVENT_CONTEXT_PROCNAME; |
| 1080 | } else if (!strcmp((char *) context_type, |
| 1081 | config_event_context_prio)) { |
| 1082 | ret = LTTNG_EVENT_CONTEXT_PRIO; |
| 1083 | } else if (!strcmp((char *) context_type, |
| 1084 | config_event_context_nice)) { |
| 1085 | ret = LTTNG_EVENT_CONTEXT_NICE; |
| 1086 | } else if (!strcmp((char *) context_type, |
| 1087 | config_event_context_vpid)) { |
| 1088 | ret = LTTNG_EVENT_CONTEXT_VPID; |
| 1089 | } else if (!strcmp((char *) context_type, |
| 1090 | config_event_context_tid)) { |
| 1091 | ret = LTTNG_EVENT_CONTEXT_TID; |
| 1092 | } else if (!strcmp((char *) context_type, |
| 1093 | config_event_context_vtid)) { |
| 1094 | ret = LTTNG_EVENT_CONTEXT_VTID; |
| 1095 | } else if (!strcmp((char *) context_type, |
| 1096 | config_event_context_ppid)) { |
| 1097 | ret = LTTNG_EVENT_CONTEXT_PPID; |
| 1098 | } else if (!strcmp((char *) context_type, |
| 1099 | config_event_context_vppid)) { |
| 1100 | ret = LTTNG_EVENT_CONTEXT_VPPID; |
| 1101 | } else if (!strcmp((char *) context_type, |
| 1102 | config_event_context_pthread_id)) { |
| 1103 | ret = LTTNG_EVENT_CONTEXT_PTHREAD_ID; |
| 1104 | } else if (!strcmp((char *) context_type, |
| 1105 | config_event_context_hostname)) { |
| 1106 | ret = LTTNG_EVENT_CONTEXT_HOSTNAME; |
| 1107 | } else if (!strcmp((char *) context_type, |
| 1108 | config_event_context_ip)) { |
| 1109 | ret = LTTNG_EVENT_CONTEXT_IP; |
| 1110 | } else if (!strcmp((char *) context_type, |
| 1111 | config_event_context_interruptible)) { |
| 1112 | ret = LTTNG_EVENT_CONTEXT_INTERRUPTIBLE; |
| 1113 | } else if (!strcmp((char *) context_type, |
| 1114 | config_event_context_preemptible)) { |
| 1115 | ret = LTTNG_EVENT_CONTEXT_PREEMPTIBLE; |
| 1116 | } else if (!strcmp((char *) context_type, |
| 1117 | config_event_context_need_reschedule)) { |
| 1118 | ret = LTTNG_EVENT_CONTEXT_NEED_RESCHEDULE; |
| 1119 | } else if (!strcmp((char *) context_type, |
| 1120 | config_event_context_migratable)) { |
| 1121 | ret = LTTNG_EVENT_CONTEXT_MIGRATABLE; |
| 1122 | } else { |
| 1123 | goto error; |
| 1124 | } |
| 1125 | |
| 1126 | return ret; |
| 1127 | error: |
| 1128 | return -1; |
| 1129 | } |
| 1130 | |
| 1131 | static |
| 1132 | int init_domain(xmlNodePtr domain_node, struct lttng_domain *domain) |
| 1133 | { |
| 1134 | int ret; |
| 1135 | xmlNodePtr node; |
| 1136 | |
| 1137 | for (node = xmlFirstElementChild(domain_node); node; |
| 1138 | node = xmlNextElementSibling(node)) { |
| 1139 | if (!strcmp((const char *) node->name, config_element_type)) { |
| 1140 | /* domain type */ |
| 1141 | xmlChar *node_content = xmlNodeGetContent(node); |
| 1142 | if (!node_content) { |
| 1143 | ret = -LTTNG_ERR_NOMEM; |
| 1144 | goto end; |
| 1145 | } |
| 1146 | |
| 1147 | ret = get_domain_type(node_content); |
| 1148 | free(node_content); |
| 1149 | if (ret < 0) { |
| 1150 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; |
| 1151 | goto end; |
| 1152 | } |
| 1153 | |
| 1154 | domain->type = ret; |
| 1155 | } else if (!strcmp((const char *) node->name, |
| 1156 | config_element_buffer_type)) { |
| 1157 | /* buffer type */ |
| 1158 | xmlChar *node_content = xmlNodeGetContent(node); |
| 1159 | if (!node_content) { |
| 1160 | ret = -LTTNG_ERR_NOMEM; |
| 1161 | goto end; |
| 1162 | } |
| 1163 | |
| 1164 | ret = get_buffer_type(node_content); |
| 1165 | free(node_content); |
| 1166 | if (ret < 0) { |
| 1167 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; |
| 1168 | goto end; |
| 1169 | } |
| 1170 | |
| 1171 | domain->buf_type = ret; |
| 1172 | } |
| 1173 | } |
| 1174 | ret = 0; |
| 1175 | end: |
| 1176 | return ret; |
| 1177 | } |
| 1178 | |
| 1179 | static |
| 1180 | int get_net_output_uris(xmlNodePtr net_output_node, char **control_uri, |
| 1181 | char **data_uri) |
| 1182 | { |
| 1183 | xmlNodePtr node; |
| 1184 | |
| 1185 | for (node = xmlFirstElementChild(net_output_node); node; |
| 1186 | node = xmlNextElementSibling(node)) { |
| 1187 | if (!strcmp((const char *) node->name, config_element_control_uri)) { |
| 1188 | /* control_uri */ |
| 1189 | *control_uri = (char *) xmlNodeGetContent(node); |
| 1190 | if (!*control_uri) { |
| 1191 | break; |
| 1192 | } |
| 1193 | } else { |
| 1194 | /* data_uri */ |
| 1195 | *data_uri = (char *) xmlNodeGetContent(node); |
| 1196 | if (!*data_uri) { |
| 1197 | break; |
| 1198 | } |
| 1199 | } |
| 1200 | } |
| 1201 | |
| 1202 | return *control_uri || *data_uri ? 0 : -LTTNG_ERR_LOAD_INVALID_CONFIG; |
| 1203 | } |
| 1204 | |
| 1205 | static |
| 1206 | int process_consumer_output(xmlNodePtr consumer_output_node, |
| 1207 | struct consumer_output *output) |
| 1208 | { |
| 1209 | int ret; |
| 1210 | xmlNodePtr node; |
| 1211 | |
| 1212 | assert(output); |
| 1213 | |
| 1214 | for (node = xmlFirstElementChild(consumer_output_node); node; |
| 1215 | node = xmlNextElementSibling(node)) { |
| 1216 | if (!strcmp((const char *) node->name, config_element_enabled)) { |
| 1217 | xmlChar *enabled_str = xmlNodeGetContent(node); |
| 1218 | |
| 1219 | /* enabled */ |
| 1220 | if (!enabled_str) { |
| 1221 | ret = -LTTNG_ERR_NOMEM; |
| 1222 | goto end; |
| 1223 | } |
| 1224 | |
| 1225 | ret = parse_bool(enabled_str, &output->enabled); |
| 1226 | free(enabled_str); |
| 1227 | if (ret) { |
| 1228 | goto end; |
| 1229 | } |
| 1230 | } else { |
| 1231 | xmlNodePtr output_type_node; |
| 1232 | |
| 1233 | /* destination */ |
| 1234 | output_type_node = xmlFirstElementChild(node); |
| 1235 | if (!output_type_node) { |
| 1236 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; |
| 1237 | goto end; |
| 1238 | } |
| 1239 | |
| 1240 | if (!strcmp((const char *) output_type_node->name, |
| 1241 | config_element_path)) { |
| 1242 | /* path */ |
| 1243 | output->path = (char *) xmlNodeGetContent(output_type_node); |
| 1244 | if (!output->path) { |
| 1245 | ret = -LTTNG_ERR_NOMEM; |
| 1246 | goto end; |
| 1247 | } |
| 1248 | } else { |
| 1249 | /* net_output */ |
| 1250 | ret = get_net_output_uris(output_type_node, |
| 1251 | &output->control_uri, &output->data_uri); |
| 1252 | if (ret) { |
| 1253 | goto end; |
| 1254 | } |
| 1255 | } |
| 1256 | } |
| 1257 | } |
| 1258 | ret = 0; |
| 1259 | |
| 1260 | end: |
| 1261 | if (ret) { |
| 1262 | free(output->path); |
| 1263 | free(output->control_uri); |
| 1264 | free(output->data_uri); |
| 1265 | memset(output, 0, sizeof(struct consumer_output)); |
| 1266 | } |
| 1267 | return ret; |
| 1268 | } |
| 1269 | |
| 1270 | static |
| 1271 | int create_session_net_output(const char *name, const char *control_uri, |
| 1272 | const char *data_uri) |
| 1273 | { |
| 1274 | int ret; |
| 1275 | struct lttng_handle *handle; |
| 1276 | const char *uri = NULL; |
| 1277 | |
| 1278 | assert(name); |
| 1279 | |
| 1280 | handle = lttng_create_handle(name, NULL); |
| 1281 | if (!handle) { |
| 1282 | ret = -LTTNG_ERR_NOMEM; |
| 1283 | goto end; |
| 1284 | } |
| 1285 | |
| 1286 | if (!control_uri || !data_uri) { |
| 1287 | uri = control_uri ? control_uri : data_uri; |
| 1288 | control_uri = uri; |
| 1289 | data_uri = uri; |
| 1290 | } |
| 1291 | |
| 1292 | ret = lttng_set_consumer_url(handle, control_uri, data_uri); |
| 1293 | lttng_destroy_handle(handle); |
| 1294 | end: |
| 1295 | return ret; |
| 1296 | } |
| 1297 | |
| 1298 | static |
| 1299 | int create_snapshot_session(const char *session_name, xmlNodePtr output_node) |
| 1300 | { |
| 1301 | int ret; |
| 1302 | xmlNodePtr node = NULL; |
| 1303 | xmlNodePtr snapshot_output_list_node; |
| 1304 | xmlNodePtr snapshot_output_node; |
| 1305 | |
| 1306 | assert(session_name); |
| 1307 | |
| 1308 | ret = lttng_create_session_snapshot(session_name, NULL); |
| 1309 | if (ret) { |
| 1310 | goto end; |
| 1311 | } |
| 1312 | |
| 1313 | if (!output_node) { |
| 1314 | goto end; |
| 1315 | } |
| 1316 | |
| 1317 | snapshot_output_list_node = xmlFirstElementChild(output_node); |
| 1318 | |
| 1319 | /* Parse and create snapshot outputs */ |
| 1320 | |
| 1321 | for (snapshot_output_node = |
| 1322 | xmlFirstElementChild(snapshot_output_list_node); |
| 1323 | snapshot_output_node; snapshot_output_node = |
| 1324 | xmlNextElementSibling(snapshot_output_node)) { |
| 1325 | char *name = NULL; |
| 1326 | uint64_t max_size = DEFAULT_SNAPSHOT_MAX_SIZE; |
| 1327 | struct consumer_output output = { 0 }; |
| 1328 | struct lttng_snapshot_output *snapshot_output = NULL; |
| 1329 | |
| 1330 | for (node = xmlFirstElementChild(snapshot_output_node); node; |
| 1331 | node = xmlNextElementSibling(node)) { |
| 1332 | if (!strcmp((const char *) node->name, |
| 1333 | config_element_name)) { |
| 1334 | /* name */ |
| 1335 | name = (char *) xmlNodeGetContent(node); |
| 1336 | if (!name) { |
| 1337 | ret = -LTTNG_ERR_NOMEM; |
| 1338 | goto error_snapshot_output; |
| 1339 | } |
| 1340 | } else if (!strcmp((const char *) node->name, |
| 1341 | config_element_max_size)) { |
| 1342 | xmlChar *content = xmlNodeGetContent(node); |
| 1343 | |
| 1344 | /* max_size */ |
| 1345 | if (!content) { |
| 1346 | ret = -LTTNG_ERR_NOMEM; |
| 1347 | goto error_snapshot_output; |
| 1348 | } |
| 1349 | ret = parse_uint(content, &max_size); |
| 1350 | free(content); |
| 1351 | if (ret) { |
| 1352 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; |
| 1353 | goto error_snapshot_output; |
| 1354 | } |
| 1355 | } else { |
| 1356 | /* consumer_output */ |
| 1357 | ret = process_consumer_output(node, &output); |
| 1358 | if (ret) { |
| 1359 | goto error_snapshot_output; |
| 1360 | } |
| 1361 | } |
| 1362 | } |
| 1363 | |
| 1364 | snapshot_output = lttng_snapshot_output_create(); |
| 1365 | if (!snapshot_output) { |
| 1366 | ret = -LTTNG_ERR_NOMEM; |
| 1367 | goto error_snapshot_output; |
| 1368 | } |
| 1369 | |
| 1370 | if (!name) { |
| 1371 | /* Generate a default name */ |
| 1372 | int pret; |
| 1373 | pret = asprintf(&name, DEFAULT_SNAPSHOT_NAME "-%" PRIu32, |
| 1374 | lttng_snapshot_output_get_id(snapshot_output)); |
| 1375 | if (pret < 0) { |
| 1376 | name = NULL; |
| 1377 | PERROR("snprintf output name"); |
| 1378 | goto error_snapshot_output; |
| 1379 | } |
| 1380 | } |
| 1381 | |
| 1382 | ret = lttng_snapshot_output_set_name(name, snapshot_output); |
| 1383 | if (ret) { |
| 1384 | goto error_snapshot_output; |
| 1385 | } |
| 1386 | |
| 1387 | ret = lttng_snapshot_output_set_size(max_size, snapshot_output); |
| 1388 | if (ret) { |
| 1389 | goto error_snapshot_output; |
| 1390 | } |
| 1391 | |
| 1392 | if (output.path) { |
| 1393 | ret = lttng_snapshot_output_set_ctrl_url(output.path, |
| 1394 | snapshot_output); |
| 1395 | if (ret) { |
| 1396 | goto error_snapshot_output; |
| 1397 | } |
| 1398 | } else { |
| 1399 | if (output.control_uri) { |
| 1400 | ret = lttng_snapshot_output_set_ctrl_url(output.control_uri, |
| 1401 | snapshot_output); |
| 1402 | if (ret) { |
| 1403 | goto error_snapshot_output; |
| 1404 | } |
| 1405 | } |
| 1406 | |
| 1407 | if (output.data_uri) { |
| 1408 | ret = lttng_snapshot_output_set_data_url(output.data_uri, |
| 1409 | snapshot_output); |
| 1410 | if (ret) { |
| 1411 | goto error_snapshot_output; |
| 1412 | } |
| 1413 | } |
| 1414 | } |
| 1415 | |
| 1416 | ret = lttng_snapshot_add_output(session_name, snapshot_output); |
| 1417 | error_snapshot_output: |
| 1418 | free(name); |
| 1419 | free(output.path); |
| 1420 | free(output.control_uri); |
| 1421 | free(output.data_uri); |
| 1422 | lttng_snapshot_output_destroy(snapshot_output); |
| 1423 | if (ret) { |
| 1424 | goto end; |
| 1425 | } |
| 1426 | } |
| 1427 | end: |
| 1428 | return ret; |
| 1429 | } |
| 1430 | |
| 1431 | static |
| 1432 | int create_session(const char *name, |
| 1433 | struct lttng_domain *kernel_domain, |
| 1434 | struct lttng_domain *ust_domain, |
| 1435 | struct lttng_domain *jul_domain, |
| 1436 | struct lttng_domain *log4j_domain, |
| 1437 | xmlNodePtr output_node, |
| 1438 | uint64_t live_timer_interval) |
| 1439 | { |
| 1440 | int ret; |
| 1441 | struct consumer_output output = { 0 }; |
| 1442 | xmlNodePtr consumer_output_node; |
| 1443 | |
| 1444 | assert(name); |
| 1445 | |
| 1446 | if (output_node) { |
| 1447 | consumer_output_node = xmlFirstElementChild(output_node); |
| 1448 | if (!consumer_output_node) { |
| 1449 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; |
| 1450 | goto end; |
| 1451 | } |
| 1452 | |
| 1453 | if (strcmp((const char *) consumer_output_node->name, |
| 1454 | config_element_consumer_output)) { |
| 1455 | WARN("Invalid output type, expected %s node", |
| 1456 | config_element_consumer_output); |
| 1457 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; |
| 1458 | goto end; |
| 1459 | } |
| 1460 | |
| 1461 | ret = process_consumer_output(consumer_output_node, &output); |
| 1462 | if (ret) { |
| 1463 | goto end; |
| 1464 | } |
| 1465 | } |
| 1466 | |
| 1467 | if (live_timer_interval != UINT64_MAX && |
| 1468 | !output.control_uri && !output.data_uri) { |
| 1469 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; |
| 1470 | goto end; |
| 1471 | } |
| 1472 | |
| 1473 | if (output.control_uri || output.data_uri) { |
| 1474 | /* network destination */ |
| 1475 | if (live_timer_interval && live_timer_interval != UINT64_MAX) { |
| 1476 | /* |
| 1477 | * URLs are provided for sure since the test above make sure that |
| 1478 | * with a live timer the data and control URIs are provided. So, |
| 1479 | * NULL is passed here and will be set right after. |
| 1480 | */ |
| 1481 | ret = lttng_create_session_live(name, NULL, live_timer_interval); |
| 1482 | } else { |
| 1483 | ret = lttng_create_session(name, NULL); |
| 1484 | } |
| 1485 | if (ret) { |
| 1486 | goto end; |
| 1487 | } |
| 1488 | |
| 1489 | ret = create_session_net_output(name, output.control_uri, |
| 1490 | output.data_uri); |
| 1491 | if (ret) { |
| 1492 | goto end; |
| 1493 | } |
| 1494 | |
| 1495 | } else { |
| 1496 | /* either local output or no output */ |
| 1497 | ret = lttng_create_session(name, output.path); |
| 1498 | if (ret) { |
| 1499 | goto end; |
| 1500 | } |
| 1501 | } |
| 1502 | end: |
| 1503 | free(output.path); |
| 1504 | free(output.control_uri); |
| 1505 | free(output.data_uri); |
| 1506 | return ret; |
| 1507 | } |
| 1508 | static |
| 1509 | int process_probe_attribute_node(xmlNodePtr probe_attribute_node, |
| 1510 | struct lttng_event_probe_attr *attr) |
| 1511 | { |
| 1512 | int ret; |
| 1513 | |
| 1514 | assert(probe_attribute_node); |
| 1515 | assert(attr); |
| 1516 | |
| 1517 | if (!strcmp((const char *) probe_attribute_node->name, |
| 1518 | config_element_address)) { |
| 1519 | xmlChar *content; |
| 1520 | uint64_t addr = 0; |
| 1521 | |
| 1522 | /* addr */ |
| 1523 | content = xmlNodeGetContent(probe_attribute_node); |
| 1524 | if (!content) { |
| 1525 | ret = -LTTNG_ERR_NOMEM; |
| 1526 | goto end; |
| 1527 | } |
| 1528 | |
| 1529 | ret = parse_uint(content, &addr); |
| 1530 | free(content); |
| 1531 | if (ret) { |
| 1532 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; |
| 1533 | goto end; |
| 1534 | } |
| 1535 | |
| 1536 | attr->addr = addr; |
| 1537 | } else if (!strcmp((const char *) probe_attribute_node->name, |
| 1538 | config_element_offset)) { |
| 1539 | xmlChar *content; |
| 1540 | uint64_t offset = 0; |
| 1541 | |
| 1542 | /* offset */ |
| 1543 | content = xmlNodeGetContent(probe_attribute_node); |
| 1544 | if (!content) { |
| 1545 | ret = -LTTNG_ERR_NOMEM; |
| 1546 | goto end; |
| 1547 | } |
| 1548 | |
| 1549 | ret = parse_uint(content, &offset); |
| 1550 | free(content); |
| 1551 | if (ret) { |
| 1552 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; |
| 1553 | goto end; |
| 1554 | } |
| 1555 | |
| 1556 | attr->offset = offset; |
| 1557 | } else if (!strcmp((const char *) probe_attribute_node->name, |
| 1558 | config_element_symbol_name)) { |
| 1559 | xmlChar *content; |
| 1560 | size_t name_len; |
| 1561 | |
| 1562 | /* symbol_name */ |
| 1563 | content = xmlNodeGetContent(probe_attribute_node); |
| 1564 | if (!content) { |
| 1565 | ret = -LTTNG_ERR_NOMEM; |
| 1566 | goto end; |
| 1567 | } |
| 1568 | |
| 1569 | name_len = strlen((char *) content); |
| 1570 | if (name_len >= LTTNG_SYMBOL_NAME_LEN) { |
| 1571 | WARN("symbol_name too long."); |
| 1572 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; |
| 1573 | free(content); |
| 1574 | goto end; |
| 1575 | } |
| 1576 | |
| 1577 | strncpy(attr->symbol_name, (const char *) content, name_len); |
| 1578 | free(content); |
| 1579 | } |
| 1580 | ret = 0; |
| 1581 | end: |
| 1582 | return ret; |
| 1583 | } |
| 1584 | |
| 1585 | static |
| 1586 | int process_event_node(xmlNodePtr event_node, struct lttng_handle *handle, |
| 1587 | const char *channel_name, const enum process_event_node_phase phase) |
| 1588 | { |
| 1589 | int ret = 0, i; |
| 1590 | xmlNodePtr node; |
| 1591 | struct lttng_event event; |
| 1592 | char **exclusions = NULL; |
| 1593 | unsigned long exclusion_count = 0; |
| 1594 | char *filter_expression = NULL; |
| 1595 | |
| 1596 | assert(event_node); |
| 1597 | assert(handle); |
| 1598 | assert(channel_name); |
| 1599 | |
| 1600 | memset(&event, 0, sizeof(event)); |
| 1601 | |
| 1602 | /* Initialize default log level which varies by domain */ |
| 1603 | switch (handle->domain.type) |
| 1604 | { |
| 1605 | case LTTNG_DOMAIN_JUL: |
| 1606 | event.loglevel = LTTNG_LOGLEVEL_JUL_ALL; |
| 1607 | break; |
| 1608 | case LTTNG_DOMAIN_LOG4J: |
| 1609 | event.loglevel = LTTNG_LOGLEVEL_LOG4J_ALL; |
| 1610 | break; |
| 1611 | case LTTNG_DOMAIN_PYTHON: |
| 1612 | event.loglevel = LTTNG_LOGLEVEL_PYTHON_DEBUG; |
| 1613 | break; |
| 1614 | case LTTNG_DOMAIN_UST: |
| 1615 | case LTTNG_DOMAIN_KERNEL: |
| 1616 | event.loglevel = LTTNG_LOGLEVEL_DEBUG; |
| 1617 | break; |
| 1618 | default: |
| 1619 | assert(0); |
| 1620 | } |
| 1621 | |
| 1622 | for (node = xmlFirstElementChild(event_node); node; |
| 1623 | node = xmlNextElementSibling(node)) { |
| 1624 | if (!strcmp((const char *) node->name, config_element_name)) { |
| 1625 | xmlChar *content; |
| 1626 | size_t name_len; |
| 1627 | |
| 1628 | /* name */ |
| 1629 | content = xmlNodeGetContent(node); |
| 1630 | if (!content) { |
| 1631 | ret = -LTTNG_ERR_NOMEM; |
| 1632 | goto end; |
| 1633 | } |
| 1634 | |
| 1635 | name_len = strlen((char *) content); |
| 1636 | if (name_len >= LTTNG_SYMBOL_NAME_LEN) { |
| 1637 | WARN("Channel name too long."); |
| 1638 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; |
| 1639 | free(content); |
| 1640 | goto end; |
| 1641 | } |
| 1642 | |
| 1643 | strncpy(event.name, (const char *) content, name_len); |
| 1644 | free(content); |
| 1645 | } else if (!strcmp((const char *) node->name, |
| 1646 | config_element_enabled)) { |
| 1647 | xmlChar *content = xmlNodeGetContent(node); |
| 1648 | |
| 1649 | /* enabled */ |
| 1650 | if (!content) { |
| 1651 | ret = -LTTNG_ERR_NOMEM; |
| 1652 | goto end; |
| 1653 | } |
| 1654 | |
| 1655 | ret = parse_bool(content, &event.enabled); |
| 1656 | free(content); |
| 1657 | if (ret) { |
| 1658 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; |
| 1659 | goto end; |
| 1660 | } |
| 1661 | } else if (!strcmp((const char *) node->name, |
| 1662 | config_element_type)) { |
| 1663 | xmlChar *content = xmlNodeGetContent(node); |
| 1664 | |
| 1665 | /* type */ |
| 1666 | if (!content) { |
| 1667 | ret = -LTTNG_ERR_NOMEM; |
| 1668 | goto end; |
| 1669 | } |
| 1670 | |
| 1671 | ret = config_get_event_type((char *) content); |
| 1672 | free(content); |
| 1673 | if (ret < 0) { |
| 1674 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; |
| 1675 | goto end; |
| 1676 | } |
| 1677 | |
| 1678 | event.type = ret; |
| 1679 | } else if (!strcmp((const char *) node->name, |
| 1680 | config_element_loglevel_type)) { |
| 1681 | xmlChar *content = xmlNodeGetContent(node); |
| 1682 | |
| 1683 | /* loglevel_type */ |
| 1684 | if (!content) { |
| 1685 | ret = -LTTNG_ERR_NOMEM; |
| 1686 | goto end; |
| 1687 | } |
| 1688 | |
| 1689 | ret = get_loglevel_type(content); |
| 1690 | free(content); |
| 1691 | if (ret < 0) { |
| 1692 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; |
| 1693 | goto end; |
| 1694 | } |
| 1695 | |
| 1696 | event.loglevel_type = ret; |
| 1697 | } else if (!strcmp((const char *) node->name, |
| 1698 | config_element_loglevel)) { |
| 1699 | xmlChar *content; |
| 1700 | int64_t loglevel = 0; |
| 1701 | |
| 1702 | /* loglevel */ |
| 1703 | content = xmlNodeGetContent(node); |
| 1704 | if (!content) { |
| 1705 | ret = -LTTNG_ERR_NOMEM; |
| 1706 | goto end; |
| 1707 | } |
| 1708 | |
| 1709 | ret = parse_int(content, &loglevel); |
| 1710 | free(content); |
| 1711 | if (ret) { |
| 1712 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; |
| 1713 | goto end; |
| 1714 | } |
| 1715 | |
| 1716 | if (loglevel > INT_MAX || loglevel < INT_MIN) { |
| 1717 | WARN("loglevel out of range."); |
| 1718 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; |
| 1719 | goto end; |
| 1720 | } |
| 1721 | |
| 1722 | event.loglevel = loglevel; |
| 1723 | } else if (!strcmp((const char *) node->name, |
| 1724 | config_element_filter)) { |
| 1725 | xmlChar *content = |
| 1726 | xmlNodeGetContent(node); |
| 1727 | |
| 1728 | /* filter */ |
| 1729 | if (!content) { |
| 1730 | ret = -LTTNG_ERR_NOMEM; |
| 1731 | goto end; |
| 1732 | } |
| 1733 | |
| 1734 | free(filter_expression); |
| 1735 | filter_expression = strdup((char *) content); |
| 1736 | free(content); |
| 1737 | if (!filter_expression) { |
| 1738 | ret = -LTTNG_ERR_NOMEM; |
| 1739 | goto end; |
| 1740 | } |
| 1741 | } else if (!strcmp((const char *) node->name, |
| 1742 | config_element_exclusions)) { |
| 1743 | xmlNodePtr exclusion_node; |
| 1744 | int exclusion_index = 0; |
| 1745 | |
| 1746 | /* exclusions */ |
| 1747 | if (exclusions) { |
| 1748 | /* |
| 1749 | * Exclusions has already been initialized, |
| 1750 | * invalid file. |
| 1751 | */ |
| 1752 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; |
| 1753 | goto end; |
| 1754 | } |
| 1755 | |
| 1756 | exclusion_count = xmlChildElementCount(node); |
| 1757 | if (!exclusion_count) { |
| 1758 | continue; |
| 1759 | } |
| 1760 | |
| 1761 | exclusions = zmalloc(exclusion_count * sizeof(char *)); |
| 1762 | if (!exclusions) { |
| 1763 | exclusion_count = 0; |
| 1764 | ret = -LTTNG_ERR_NOMEM; |
| 1765 | goto end; |
| 1766 | } |
| 1767 | |
| 1768 | for (exclusion_node = xmlFirstElementChild(node); exclusion_node; |
| 1769 | exclusion_node = xmlNextElementSibling(exclusion_node)) { |
| 1770 | xmlChar *content = |
| 1771 | xmlNodeGetContent(exclusion_node); |
| 1772 | |
| 1773 | if (!content) { |
| 1774 | ret = -LTTNG_ERR_NOMEM; |
| 1775 | goto end; |
| 1776 | } |
| 1777 | |
| 1778 | exclusions[exclusion_index] = strdup((const char *) content); |
| 1779 | free(content); |
| 1780 | if (!exclusions[exclusion_index]) { |
| 1781 | ret = -LTTNG_ERR_NOMEM; |
| 1782 | goto end; |
| 1783 | } |
| 1784 | exclusion_index++; |
| 1785 | } |
| 1786 | |
| 1787 | event.exclusion = 1; |
| 1788 | } else if (!strcmp((const char *) node->name, |
| 1789 | config_element_attributes)) { |
| 1790 | xmlNodePtr attribute_node = xmlFirstElementChild(node); |
| 1791 | |
| 1792 | /* attributes */ |
| 1793 | if (!attribute_node) { |
| 1794 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; |
| 1795 | goto end; |
| 1796 | } |
| 1797 | |
| 1798 | if (!strcmp((const char *) node->name, |
| 1799 | config_element_probe_attributes)) { |
| 1800 | xmlNodePtr probe_attribute_node; |
| 1801 | |
| 1802 | /* probe_attributes */ |
| 1803 | for (probe_attribute_node = |
| 1804 | xmlFirstElementChild(attribute_node); probe_attribute_node; |
| 1805 | probe_attribute_node = xmlNextElementSibling( |
| 1806 | probe_attribute_node)) { |
| 1807 | |
| 1808 | ret = process_probe_attribute_node(probe_attribute_node, |
| 1809 | &event.attr.probe); |
| 1810 | if (ret) { |
| 1811 | goto end; |
| 1812 | } |
| 1813 | } |
| 1814 | } else { |
| 1815 | size_t sym_len; |
| 1816 | xmlChar *content; |
| 1817 | xmlNodePtr symbol_node = xmlFirstElementChild(attribute_node); |
| 1818 | |
| 1819 | /* function_attributes */ |
| 1820 | content = xmlNodeGetContent(symbol_node); |
| 1821 | if (!content) { |
| 1822 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; |
| 1823 | goto end; |
| 1824 | } |
| 1825 | |
| 1826 | sym_len = strlen((char *) content); |
| 1827 | if (sym_len >= LTTNG_SYMBOL_NAME_LEN) { |
| 1828 | WARN("Function name too long."); |
| 1829 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; |
| 1830 | free(content); |
| 1831 | goto end; |
| 1832 | } |
| 1833 | |
| 1834 | strncpy(event.attr.ftrace.symbol_name, (char *) content, |
| 1835 | sym_len); |
| 1836 | free(content); |
| 1837 | } |
| 1838 | } |
| 1839 | } |
| 1840 | |
| 1841 | if ((event.enabled && phase == ENABLE) || phase == CREATION) { |
| 1842 | ret = lttng_enable_event_with_exclusions(handle, &event, channel_name, |
| 1843 | filter_expression, exclusion_count, exclusions); |
| 1844 | if (ret < 0) { |
| 1845 | WARN("Enabling event (name:%s) on load failed.", event.name); |
| 1846 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; |
| 1847 | goto end; |
| 1848 | } |
| 1849 | } |
| 1850 | end: |
| 1851 | for (i = 0; i < exclusion_count; i++) { |
| 1852 | free(exclusions[i]); |
| 1853 | } |
| 1854 | |
| 1855 | free(exclusions); |
| 1856 | free(filter_expression); |
| 1857 | return ret; |
| 1858 | } |
| 1859 | |
| 1860 | static |
| 1861 | int process_events_node(xmlNodePtr events_node, struct lttng_handle *handle, |
| 1862 | const char *channel_name) |
| 1863 | { |
| 1864 | int ret = 0; |
| 1865 | struct lttng_event event; |
| 1866 | xmlNodePtr node; |
| 1867 | |
| 1868 | assert(events_node); |
| 1869 | assert(handle); |
| 1870 | assert(channel_name); |
| 1871 | |
| 1872 | for (node = xmlFirstElementChild(events_node); node; |
| 1873 | node = xmlNextElementSibling(node)) { |
| 1874 | ret = process_event_node(node, handle, channel_name, CREATION); |
| 1875 | if (ret) { |
| 1876 | goto end; |
| 1877 | } |
| 1878 | } |
| 1879 | |
| 1880 | /* |
| 1881 | * Disable all events to enable only the necessary events. |
| 1882 | * Limitations regarding lttng_disable_events and tuple descriptor |
| 1883 | * force this approach. |
| 1884 | */ |
| 1885 | memset(&event, 0, sizeof(event)); |
| 1886 | event.loglevel = -1; |
| 1887 | event.type = LTTNG_EVENT_ALL; |
| 1888 | ret = lttng_disable_event_ext(handle, &event, channel_name, NULL); |
| 1889 | if (ret) { |
| 1890 | goto end; |
| 1891 | } |
| 1892 | |
| 1893 | for (node = xmlFirstElementChild(events_node); node; |
| 1894 | node = xmlNextElementSibling(node)) { |
| 1895 | ret = process_event_node(node, handle, channel_name, ENABLE); |
| 1896 | if (ret) { |
| 1897 | goto end; |
| 1898 | } |
| 1899 | } |
| 1900 | |
| 1901 | end: |
| 1902 | return ret; |
| 1903 | } |
| 1904 | |
| 1905 | static |
| 1906 | int process_channel_attr_node(xmlNodePtr attr_node, bool snapshot_mode, |
| 1907 | enum lttng_domain_type domain, struct lttng_channel *channel, |
| 1908 | xmlNodePtr *contexts_node, xmlNodePtr *events_node) |
| 1909 | { |
| 1910 | int ret; |
| 1911 | |
| 1912 | assert(attr_node); |
| 1913 | assert(channel); |
| 1914 | assert(contexts_node); |
| 1915 | assert(events_node); |
| 1916 | |
| 1917 | if (!strcmp((const char *) attr_node->name, config_element_name)) { |
| 1918 | xmlChar *content; |
| 1919 | size_t name_len; |
| 1920 | |
| 1921 | /* name */ |
| 1922 | content = xmlNodeGetContent(attr_node); |
| 1923 | if (!content) { |
| 1924 | ret = -LTTNG_ERR_NOMEM; |
| 1925 | goto end; |
| 1926 | } |
| 1927 | |
| 1928 | name_len = strlen((char *) content); |
| 1929 | if (name_len >= LTTNG_SYMBOL_NAME_LEN) { |
| 1930 | WARN("Channel name too long."); |
| 1931 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; |
| 1932 | free(content); |
| 1933 | goto end; |
| 1934 | } |
| 1935 | |
| 1936 | strncpy(channel->name, (const char *) content, name_len); |
| 1937 | free(content); |
| 1938 | } else if (!strcmp((const char *) attr_node->name, |
| 1939 | config_element_enabled)) { |
| 1940 | xmlChar *content; |
| 1941 | int enabled; |
| 1942 | |
| 1943 | /* enabled */ |
| 1944 | content = xmlNodeGetContent(attr_node); |
| 1945 | if (!content) { |
| 1946 | ret = -LTTNG_ERR_NOMEM; |
| 1947 | goto end; |
| 1948 | } |
| 1949 | |
| 1950 | ret = parse_bool(content, &enabled); |
| 1951 | free(content); |
| 1952 | if (ret) { |
| 1953 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; |
| 1954 | goto end; |
| 1955 | } |
| 1956 | |
| 1957 | channel->enabled = enabled; |
| 1958 | } else if (!strcmp((const char *) attr_node->name, |
| 1959 | config_element_overwrite_mode)) { |
| 1960 | xmlChar *content; |
| 1961 | |
| 1962 | /* overwrite_mode */ |
| 1963 | content = xmlNodeGetContent(attr_node); |
| 1964 | if (!content) { |
| 1965 | ret = -LTTNG_ERR_NOMEM; |
| 1966 | goto end; |
| 1967 | } |
| 1968 | |
| 1969 | ret = get_overwrite_mode(content); |
| 1970 | free(content); |
| 1971 | if (ret < 0) { |
| 1972 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; |
| 1973 | goto end; |
| 1974 | } |
| 1975 | |
| 1976 | channel->attr.overwrite = ret; |
| 1977 | } else if (!strcmp((const char *) attr_node->name, |
| 1978 | config_element_subbuf_size)) { |
| 1979 | xmlChar *content; |
| 1980 | |
| 1981 | /* subbuffer_size */ |
| 1982 | content = xmlNodeGetContent(attr_node); |
| 1983 | if (!content) { |
| 1984 | ret = -LTTNG_ERR_NOMEM; |
| 1985 | goto end; |
| 1986 | } |
| 1987 | |
| 1988 | ret = parse_uint(content, &channel->attr.subbuf_size); |
| 1989 | free(content); |
| 1990 | if (ret) { |
| 1991 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; |
| 1992 | goto end; |
| 1993 | } |
| 1994 | } else if (!strcmp((const char *) attr_node->name, |
| 1995 | config_element_num_subbuf)) { |
| 1996 | xmlChar *content; |
| 1997 | |
| 1998 | /* subbuffer_count */ |
| 1999 | content = xmlNodeGetContent(attr_node); |
| 2000 | if (!content) { |
| 2001 | ret = -LTTNG_ERR_NOMEM; |
| 2002 | goto end; |
| 2003 | } |
| 2004 | |
| 2005 | ret = parse_uint(content, &channel->attr.num_subbuf); |
| 2006 | free(content); |
| 2007 | if (ret) { |
| 2008 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; |
| 2009 | goto end; |
| 2010 | } |
| 2011 | } else if (!strcmp((const char *) attr_node->name, |
| 2012 | config_element_switch_timer_interval)) { |
| 2013 | xmlChar *content; |
| 2014 | uint64_t switch_timer_interval = 0; |
| 2015 | |
| 2016 | /* switch_timer_interval */ |
| 2017 | content = xmlNodeGetContent(attr_node); |
| 2018 | if (!content) { |
| 2019 | ret = -LTTNG_ERR_NOMEM; |
| 2020 | goto end; |
| 2021 | } |
| 2022 | |
| 2023 | ret = parse_uint(content, &switch_timer_interval); |
| 2024 | free(content); |
| 2025 | if (ret) { |
| 2026 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; |
| 2027 | goto end; |
| 2028 | } |
| 2029 | |
| 2030 | if (switch_timer_interval > UINT_MAX) { |
| 2031 | WARN("switch_timer_interval out of range."); |
| 2032 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; |
| 2033 | goto end; |
| 2034 | } |
| 2035 | |
| 2036 | channel->attr.switch_timer_interval = |
| 2037 | switch_timer_interval; |
| 2038 | } else if (!strcmp((const char *) attr_node->name, |
| 2039 | config_element_read_timer_interval)) { |
| 2040 | xmlChar *content; |
| 2041 | uint64_t read_timer_interval = 0; |
| 2042 | |
| 2043 | /* read_timer_interval */ |
| 2044 | content = xmlNodeGetContent(attr_node); |
| 2045 | if (!content) { |
| 2046 | ret = -LTTNG_ERR_NOMEM; |
| 2047 | goto end; |
| 2048 | } |
| 2049 | |
| 2050 | ret = parse_uint(content, &read_timer_interval); |
| 2051 | free(content); |
| 2052 | if (ret) { |
| 2053 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; |
| 2054 | goto end; |
| 2055 | } |
| 2056 | |
| 2057 | if (read_timer_interval > UINT_MAX) { |
| 2058 | WARN("read_timer_interval out of range."); |
| 2059 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; |
| 2060 | goto end; |
| 2061 | } |
| 2062 | |
| 2063 | channel->attr.read_timer_interval = |
| 2064 | read_timer_interval; |
| 2065 | } else if (!strcmp((const char *) attr_node->name, |
| 2066 | config_element_output_type)) { |
| 2067 | xmlChar *content; |
| 2068 | |
| 2069 | /* output_type */ |
| 2070 | content = xmlNodeGetContent(attr_node); |
| 2071 | if (!content) { |
| 2072 | ret = -LTTNG_ERR_NOMEM; |
| 2073 | goto end; |
| 2074 | } |
| 2075 | |
| 2076 | ret = get_output_type(content); |
| 2077 | free(content); |
| 2078 | if (ret < 0) { |
| 2079 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; |
| 2080 | goto end; |
| 2081 | } |
| 2082 | |
| 2083 | channel->attr.output = ret; |
| 2084 | } else if (!strcmp((const char *) attr_node->name, |
| 2085 | config_element_tracefile_size)) { |
| 2086 | xmlChar *content; |
| 2087 | |
| 2088 | /* tracefile_size */ |
| 2089 | content = xmlNodeGetContent(attr_node); |
| 2090 | if (!content) { |
| 2091 | ret = -LTTNG_ERR_NOMEM; |
| 2092 | goto end; |
| 2093 | } |
| 2094 | |
| 2095 | ret = parse_uint(content, &channel->attr.tracefile_size); |
| 2096 | free(content); |
| 2097 | if (ret) { |
| 2098 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; |
| 2099 | goto end; |
| 2100 | } |
| 2101 | } else if (!strcmp((const char *) attr_node->name, |
| 2102 | config_element_tracefile_count)) { |
| 2103 | xmlChar *content; |
| 2104 | |
| 2105 | /* tracefile_count */ |
| 2106 | content = xmlNodeGetContent(attr_node); |
| 2107 | if (!content) { |
| 2108 | ret = -LTTNG_ERR_NOMEM; |
| 2109 | goto end; |
| 2110 | } |
| 2111 | |
| 2112 | ret = parse_uint(content, &channel->attr.tracefile_count); |
| 2113 | free(content); |
| 2114 | if (ret) { |
| 2115 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; |
| 2116 | goto end; |
| 2117 | } |
| 2118 | } else if (!strcmp((const char *) attr_node->name, |
| 2119 | config_element_live_timer_interval)) { |
| 2120 | xmlChar *content; |
| 2121 | uint64_t live_timer_interval = 0; |
| 2122 | |
| 2123 | /* live_timer_interval */ |
| 2124 | content = xmlNodeGetContent(attr_node); |
| 2125 | if (!content) { |
| 2126 | ret = -LTTNG_ERR_NOMEM; |
| 2127 | goto end; |
| 2128 | } |
| 2129 | |
| 2130 | ret = parse_uint(content, &live_timer_interval); |
| 2131 | free(content); |
| 2132 | if (ret) { |
| 2133 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; |
| 2134 | goto end; |
| 2135 | } |
| 2136 | |
| 2137 | if (live_timer_interval > UINT_MAX) { |
| 2138 | WARN("live_timer_interval out of range."); |
| 2139 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; |
| 2140 | goto end; |
| 2141 | } |
| 2142 | |
| 2143 | channel->attr.live_timer_interval = |
| 2144 | live_timer_interval; |
| 2145 | } else if (!strcmp((const char *) attr_node->name, |
| 2146 | config_element_events)) { |
| 2147 | /* events */ |
| 2148 | *events_node = attr_node; |
| 2149 | } else { |
| 2150 | /* contexts */ |
| 2151 | *contexts_node = attr_node; |
| 2152 | } |
| 2153 | |
| 2154 | ret = 0; |
| 2155 | end: |
| 2156 | return ret; |
| 2157 | } |
| 2158 | |
| 2159 | static |
| 2160 | int process_context_node(xmlNodePtr context_node, |
| 2161 | struct lttng_handle *handle, const char *channel_name) |
| 2162 | { |
| 2163 | int ret; |
| 2164 | struct lttng_event_context context; |
| 2165 | xmlNodePtr context_child_node = xmlFirstElementChild(context_node); |
| 2166 | |
| 2167 | assert(handle); |
| 2168 | assert(channel_name); |
| 2169 | |
| 2170 | if (!context_child_node) { |
| 2171 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; |
| 2172 | goto end; |
| 2173 | } |
| 2174 | |
| 2175 | memset(&context, 0, sizeof(context)); |
| 2176 | |
| 2177 | if (!strcmp((const char *) context_child_node->name, |
| 2178 | config_element_type)) { |
| 2179 | /* type */ |
| 2180 | xmlChar *content = xmlNodeGetContent(context_child_node); |
| 2181 | |
| 2182 | if (!content) { |
| 2183 | ret = -LTTNG_ERR_NOMEM; |
| 2184 | goto end; |
| 2185 | } |
| 2186 | |
| 2187 | ret = get_context_type(content); |
| 2188 | free(content); |
| 2189 | if (ret < 0) { |
| 2190 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; |
| 2191 | goto end; |
| 2192 | } |
| 2193 | |
| 2194 | context.ctx = ret; |
| 2195 | } else if (!strcmp((const char *) context_child_node->name, |
| 2196 | config_element_context_perf)) { |
| 2197 | /* perf */ |
| 2198 | xmlNodePtr perf_attr_node; |
| 2199 | |
| 2200 | context.ctx = handle->domain.type == LTTNG_DOMAIN_KERNEL ? |
| 2201 | LTTNG_EVENT_CONTEXT_PERF_CPU_COUNTER : |
| 2202 | LTTNG_EVENT_CONTEXT_PERF_THREAD_COUNTER; |
| 2203 | for (perf_attr_node = xmlFirstElementChild(context_child_node); |
| 2204 | perf_attr_node; perf_attr_node = |
| 2205 | xmlNextElementSibling(perf_attr_node)) { |
| 2206 | if (!strcmp((const char *) perf_attr_node->name, |
| 2207 | config_element_type)) { |
| 2208 | xmlChar *content; |
| 2209 | uint64_t type = 0; |
| 2210 | |
| 2211 | /* type */ |
| 2212 | content = xmlNodeGetContent(perf_attr_node); |
| 2213 | if (!content) { |
| 2214 | ret = -LTTNG_ERR_NOMEM; |
| 2215 | goto end; |
| 2216 | } |
| 2217 | |
| 2218 | ret = parse_uint(content, &type); |
| 2219 | free(content); |
| 2220 | if (ret) { |
| 2221 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; |
| 2222 | goto end; |
| 2223 | } |
| 2224 | |
| 2225 | if (type > UINT32_MAX) { |
| 2226 | WARN("perf context type out of range."); |
| 2227 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; |
| 2228 | goto end; |
| 2229 | } |
| 2230 | |
| 2231 | context.u.perf_counter.type = type; |
| 2232 | } else if (!strcmp((const char *) perf_attr_node->name, |
| 2233 | config_element_config)) { |
| 2234 | xmlChar *content; |
| 2235 | uint64_t config = 0; |
| 2236 | |
| 2237 | /* config */ |
| 2238 | content = xmlNodeGetContent(perf_attr_node); |
| 2239 | if (!content) { |
| 2240 | ret = -LTTNG_ERR_NOMEM; |
| 2241 | goto end; |
| 2242 | } |
| 2243 | |
| 2244 | ret = parse_uint(content, &config); |
| 2245 | free(content); |
| 2246 | if (ret) { |
| 2247 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; |
| 2248 | goto end; |
| 2249 | } |
| 2250 | |
| 2251 | context.u.perf_counter.config = config; |
| 2252 | } else if (!strcmp((const char *) perf_attr_node->name, |
| 2253 | config_element_name)) { |
| 2254 | xmlChar *content; |
| 2255 | size_t name_len; |
| 2256 | |
| 2257 | /* name */ |
| 2258 | content = xmlNodeGetContent(perf_attr_node); |
| 2259 | if (!content) { |
| 2260 | ret = -LTTNG_ERR_NOMEM; |
| 2261 | goto end; |
| 2262 | } |
| 2263 | |
| 2264 | name_len = strlen((char *) content); |
| 2265 | if (name_len >= LTTNG_SYMBOL_NAME_LEN) { |
| 2266 | WARN("perf context name too long."); |
| 2267 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; |
| 2268 | free(content); |
| 2269 | goto end; |
| 2270 | } |
| 2271 | |
| 2272 | strncpy(context.u.perf_counter.name, (const char *) content, |
| 2273 | name_len); |
| 2274 | free(content); |
| 2275 | } |
| 2276 | } |
| 2277 | } else if (!strcmp((const char *) context_child_node->name, |
| 2278 | config_element_context_app)) { |
| 2279 | /* application context */ |
| 2280 | xmlNodePtr app_ctx_node; |
| 2281 | |
| 2282 | context.ctx = LTTNG_EVENT_CONTEXT_APP_CONTEXT; |
| 2283 | for (app_ctx_node = xmlFirstElementChild(context_child_node); |
| 2284 | app_ctx_node; app_ctx_node = |
| 2285 | xmlNextElementSibling(app_ctx_node)) { |
| 2286 | xmlChar *content; |
| 2287 | char **target = strcmp( |
| 2288 | (const char *) app_ctx_node->name, |
| 2289 | config_element_context_app_provider_name) == 0 ? |
| 2290 | &context.u.app_ctx.provider_name : |
| 2291 | &context.u.app_ctx.ctx_name; |
| 2292 | |
| 2293 | content = xmlNodeGetContent(app_ctx_node); |
| 2294 | if (!content) { |
| 2295 | ret = -LTTNG_ERR_NOMEM; |
| 2296 | goto end; |
| 2297 | } |
| 2298 | |
| 2299 | *target = (char *) content; |
| 2300 | } |
| 2301 | } else { |
| 2302 | /* Unrecognized context type */ |
| 2303 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; |
| 2304 | goto end; |
| 2305 | } |
| 2306 | |
| 2307 | ret = lttng_add_context(handle, &context, NULL, channel_name); |
| 2308 | if (context.ctx == LTTNG_EVENT_CONTEXT_APP_CONTEXT) { |
| 2309 | free(context.u.app_ctx.provider_name); |
| 2310 | free(context.u.app_ctx.ctx_name); |
| 2311 | } |
| 2312 | end: |
| 2313 | return ret; |
| 2314 | } |
| 2315 | |
| 2316 | static |
| 2317 | int process_contexts_node(xmlNodePtr contexts_node, |
| 2318 | struct lttng_handle *handle, const char *channel_name) |
| 2319 | { |
| 2320 | int ret = 0; |
| 2321 | xmlNodePtr context_node; |
| 2322 | |
| 2323 | for (context_node = xmlFirstElementChild(contexts_node); context_node; |
| 2324 | context_node = xmlNextElementSibling(context_node)) { |
| 2325 | ret = process_context_node(context_node, handle, channel_name); |
| 2326 | if (ret) { |
| 2327 | goto end; |
| 2328 | } |
| 2329 | } |
| 2330 | end: |
| 2331 | return ret; |
| 2332 | } |
| 2333 | |
| 2334 | static |
| 2335 | int process_pid_tracker_node(xmlNodePtr pid_tracker_node, |
| 2336 | struct lttng_handle *handle) |
| 2337 | { |
| 2338 | int ret = 0, child; |
| 2339 | xmlNodePtr targets_node = NULL; |
| 2340 | xmlNodePtr node; |
| 2341 | |
| 2342 | assert(handle); |
| 2343 | assert(pid_tracker_node); |
| 2344 | /* get the targets node */ |
| 2345 | for (node = xmlFirstElementChild(pid_tracker_node); node; |
| 2346 | node = xmlNextElementSibling(node)) { |
| 2347 | if (!strcmp((const char *) node->name, |
| 2348 | config_element_targets)) { |
| 2349 | targets_node = node; |
| 2350 | break; |
| 2351 | } |
| 2352 | } |
| 2353 | |
| 2354 | if (!targets_node) { |
| 2355 | ret = LTTNG_ERR_INVALID; |
| 2356 | goto end; |
| 2357 | } |
| 2358 | |
| 2359 | /* Go through all pid_target node */ |
| 2360 | child = xmlChildElementCount(targets_node); |
| 2361 | if (child == 0) { |
| 2362 | /* The session is explicitly set to target nothing. */ |
| 2363 | ret = lttng_untrack_pid(handle, -1); |
| 2364 | if (ret) { |
| 2365 | goto end; |
| 2366 | } |
| 2367 | } |
| 2368 | for (node = xmlFirstElementChild(targets_node); node; |
| 2369 | node = xmlNextElementSibling(node)) { |
| 2370 | xmlNodePtr pid_target_node = node; |
| 2371 | |
| 2372 | /* get pid node and track it */ |
| 2373 | for (node = xmlFirstElementChild(pid_target_node); node; |
| 2374 | node = xmlNextElementSibling(node)) { |
| 2375 | if (!strcmp((const char *) node->name, |
| 2376 | config_element_pid)) { |
| 2377 | int64_t pid; |
| 2378 | xmlChar *content = NULL; |
| 2379 | |
| 2380 | content = xmlNodeGetContent(node); |
| 2381 | if (!content) { |
| 2382 | ret = LTTNG_ERR_LOAD_INVALID_CONFIG; |
| 2383 | goto end; |
| 2384 | } |
| 2385 | |
| 2386 | ret = parse_int(content, &pid); |
| 2387 | free(content); |
| 2388 | if (ret) { |
| 2389 | ret = LTTNG_ERR_LOAD_INVALID_CONFIG; |
| 2390 | goto end; |
| 2391 | } |
| 2392 | |
| 2393 | ret = lttng_track_pid(handle, (int) pid); |
| 2394 | if (ret) { |
| 2395 | goto end; |
| 2396 | } |
| 2397 | } |
| 2398 | } |
| 2399 | node = pid_target_node; |
| 2400 | } |
| 2401 | |
| 2402 | end: |
| 2403 | return ret; |
| 2404 | } |
| 2405 | |
| 2406 | |
| 2407 | static |
| 2408 | int process_domain_node(xmlNodePtr domain_node, const char *session_name, |
| 2409 | bool snapshot_mode) |
| 2410 | { |
| 2411 | int ret; |
| 2412 | struct lttng_domain domain = { 0 }; |
| 2413 | struct lttng_handle *handle = NULL; |
| 2414 | xmlNodePtr channels_node = NULL; |
| 2415 | xmlNodePtr trackers_node = NULL; |
| 2416 | xmlNodePtr pid_tracker_node = NULL; |
| 2417 | xmlNodePtr node; |
| 2418 | |
| 2419 | assert(session_name); |
| 2420 | |
| 2421 | ret = init_domain(domain_node, &domain); |
| 2422 | if (ret) { |
| 2423 | goto end; |
| 2424 | } |
| 2425 | |
| 2426 | handle = lttng_create_handle(session_name, &domain); |
| 2427 | if (!handle) { |
| 2428 | ret = -LTTNG_ERR_NOMEM; |
| 2429 | goto end; |
| 2430 | } |
| 2431 | |
| 2432 | /* get the channels node */ |
| 2433 | for (node = xmlFirstElementChild(domain_node); node; |
| 2434 | node = xmlNextElementSibling(node)) { |
| 2435 | if (!strcmp((const char *) node->name, |
| 2436 | config_element_channels)) { |
| 2437 | channels_node = node; |
| 2438 | break; |
| 2439 | } |
| 2440 | } |
| 2441 | |
| 2442 | if (!channels_node) { |
| 2443 | goto end; |
| 2444 | } |
| 2445 | |
| 2446 | /* create all channels */ |
| 2447 | for (node = xmlFirstElementChild(channels_node); node; |
| 2448 | node = xmlNextElementSibling(node)) { |
| 2449 | struct lttng_channel channel; |
| 2450 | xmlNodePtr contexts_node = NULL; |
| 2451 | xmlNodePtr events_node = NULL; |
| 2452 | xmlNodePtr channel_attr_node; |
| 2453 | |
| 2454 | memset(&channel, 0, sizeof(channel)); |
| 2455 | lttng_channel_set_default_attr(&domain, &channel.attr); |
| 2456 | |
| 2457 | for (channel_attr_node = xmlFirstElementChild(node); |
| 2458 | channel_attr_node; channel_attr_node = |
| 2459 | xmlNextElementSibling(channel_attr_node)) { |
| 2460 | ret = process_channel_attr_node(channel_attr_node, |
| 2461 | snapshot_mode, domain.type, &channel, |
| 2462 | &contexts_node, &events_node); |
| 2463 | if (ret) { |
| 2464 | goto end; |
| 2465 | } |
| 2466 | } |
| 2467 | |
| 2468 | if (!channel.name) { |
| 2469 | ERR("Encountered a channel with no name attribute."); |
| 2470 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; |
| 2471 | goto end; |
| 2472 | } |
| 2473 | |
| 2474 | ret = lttng_enable_channel(handle, &channel); |
| 2475 | if (ret < 0) { |
| 2476 | goto end; |
| 2477 | } |
| 2478 | |
| 2479 | ret = process_events_node(events_node, handle, channel.name); |
| 2480 | if (ret) { |
| 2481 | goto end; |
| 2482 | } |
| 2483 | |
| 2484 | ret = process_contexts_node(contexts_node, handle, |
| 2485 | channel.name); |
| 2486 | if (ret) { |
| 2487 | goto end; |
| 2488 | } |
| 2489 | } |
| 2490 | |
| 2491 | /* get the trackers node */ |
| 2492 | for (node = xmlFirstElementChild(domain_node); node; |
| 2493 | node = xmlNextElementSibling(node)) { |
| 2494 | if (!strcmp((const char *) node->name, |
| 2495 | config_element_trackers)) { |
| 2496 | trackers_node = node; |
| 2497 | break; |
| 2498 | } |
| 2499 | } |
| 2500 | |
| 2501 | if (!trackers_node) { |
| 2502 | goto end; |
| 2503 | } |
| 2504 | |
| 2505 | for (node = xmlFirstElementChild(trackers_node); node; |
| 2506 | node = xmlNextElementSibling(node)) { |
| 2507 | if (!strcmp((const char *)node->name,config_element_pid_tracker)) { |
| 2508 | pid_tracker_node = node; |
| 2509 | ret = process_pid_tracker_node(pid_tracker_node, handle); |
| 2510 | if (ret) { |
| 2511 | goto end; |
| 2512 | } |
| 2513 | } |
| 2514 | } |
| 2515 | |
| 2516 | if (!pid_tracker_node) { |
| 2517 | lttng_track_pid(handle, -1); |
| 2518 | } |
| 2519 | |
| 2520 | end: |
| 2521 | lttng_destroy_handle(handle); |
| 2522 | return ret; |
| 2523 | } |
| 2524 | |
| 2525 | static |
| 2526 | int process_session_node(xmlNodePtr session_node, const char *session_name, |
| 2527 | int override) |
| 2528 | { |
| 2529 | int ret, started = -1, snapshot_mode = -1; |
| 2530 | uint64_t live_timer_interval = UINT64_MAX; |
| 2531 | xmlChar *name = NULL; |
| 2532 | xmlChar *shm_path = NULL; |
| 2533 | xmlNodePtr domains_node = NULL; |
| 2534 | xmlNodePtr output_node = NULL; |
| 2535 | xmlNodePtr node; |
| 2536 | struct lttng_domain *kernel_domain = NULL; |
| 2537 | struct lttng_domain *ust_domain = NULL; |
| 2538 | struct lttng_domain *jul_domain = NULL; |
| 2539 | struct lttng_domain *log4j_domain = NULL; |
| 2540 | struct lttng_domain *python_domain = NULL; |
| 2541 | |
| 2542 | for (node = xmlFirstElementChild(session_node); node; |
| 2543 | node = xmlNextElementSibling(node)) { |
| 2544 | if (!name && !strcmp((const char *) node->name, |
| 2545 | config_element_name)) { |
| 2546 | /* name */ |
| 2547 | xmlChar *node_content = xmlNodeGetContent(node); |
| 2548 | if (!node_content) { |
| 2549 | ret = -LTTNG_ERR_NOMEM; |
| 2550 | goto error; |
| 2551 | } |
| 2552 | |
| 2553 | name = node_content; |
| 2554 | } else if (!domains_node && !strcmp((const char *) node->name, |
| 2555 | config_element_domains)) { |
| 2556 | /* domains */ |
| 2557 | domains_node = node; |
| 2558 | } else if (started == -1 && !strcmp((const char *) node->name, |
| 2559 | config_element_started)) { |
| 2560 | /* started */ |
| 2561 | xmlChar *node_content = xmlNodeGetContent(node); |
| 2562 | if (!node_content) { |
| 2563 | ret = -LTTNG_ERR_NOMEM; |
| 2564 | goto error; |
| 2565 | } |
| 2566 | |
| 2567 | ret = parse_bool(node_content, &started); |
| 2568 | free(node_content); |
| 2569 | if (ret) { |
| 2570 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; |
| 2571 | goto error; |
| 2572 | } |
| 2573 | } else if (!output_node && !strcmp((const char *) node->name, |
| 2574 | config_element_output)) { |
| 2575 | /* output */ |
| 2576 | output_node = node; |
| 2577 | } else if (!shm_path && !strcmp((const char *) node->name, |
| 2578 | config_element_shared_memory_path)) { |
| 2579 | /* shared memory path */ |
| 2580 | xmlChar *node_content = xmlNodeGetContent(node); |
| 2581 | if (!node_content) { |
| 2582 | ret = -LTTNG_ERR_NOMEM; |
| 2583 | goto error; |
| 2584 | } |
| 2585 | |
| 2586 | shm_path = node_content; |
| 2587 | } else { |
| 2588 | /* attributes, snapshot_mode or live_timer_interval */ |
| 2589 | xmlNodePtr attributes_child = |
| 2590 | xmlFirstElementChild(node); |
| 2591 | |
| 2592 | if (!strcmp((const char *) attributes_child->name, |
| 2593 | config_element_snapshot_mode)) { |
| 2594 | /* snapshot_mode */ |
| 2595 | xmlChar *snapshot_mode_content = |
| 2596 | xmlNodeGetContent(attributes_child); |
| 2597 | if (!snapshot_mode_content) { |
| 2598 | ret = -LTTNG_ERR_NOMEM; |
| 2599 | goto error; |
| 2600 | } |
| 2601 | |
| 2602 | ret = parse_bool(snapshot_mode_content, &snapshot_mode); |
| 2603 | free(snapshot_mode_content); |
| 2604 | if (ret) { |
| 2605 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; |
| 2606 | goto error; |
| 2607 | } |
| 2608 | } else { |
| 2609 | /* live_timer_interval */ |
| 2610 | xmlChar *timer_interval_content = |
| 2611 | xmlNodeGetContent(attributes_child); |
| 2612 | if (!timer_interval_content) { |
| 2613 | ret = -LTTNG_ERR_NOMEM; |
| 2614 | goto error; |
| 2615 | } |
| 2616 | |
| 2617 | ret = parse_uint(timer_interval_content, &live_timer_interval); |
| 2618 | free(timer_interval_content); |
| 2619 | if (ret) { |
| 2620 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; |
| 2621 | goto error; |
| 2622 | } |
| 2623 | } |
| 2624 | } |
| 2625 | } |
| 2626 | |
| 2627 | if (!name) { |
| 2628 | /* Mandatory attribute, as defined in the session XSD */ |
| 2629 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; |
| 2630 | goto error; |
| 2631 | } |
| 2632 | |
| 2633 | if (session_name && strcmp((char *) name, session_name)) { |
| 2634 | /* This is not the session we are looking for */ |
| 2635 | ret = -LTTNG_ERR_NO_SESSION; |
| 2636 | goto error; |
| 2637 | } |
| 2638 | |
| 2639 | /* Init domains to create the session handles */ |
| 2640 | for (node = xmlFirstElementChild(domains_node); node; |
| 2641 | node = xmlNextElementSibling(node)) { |
| 2642 | struct lttng_domain *domain; |
| 2643 | |
| 2644 | domain = zmalloc(sizeof(*domain)); |
| 2645 | if (!domain) { |
| 2646 | ret = -LTTNG_ERR_NOMEM; |
| 2647 | goto error; |
| 2648 | } |
| 2649 | |
| 2650 | ret = init_domain(node, domain); |
| 2651 | if (ret) { |
| 2652 | goto domain_init_error; |
| 2653 | } |
| 2654 | |
| 2655 | switch (domain->type) { |
| 2656 | case LTTNG_DOMAIN_KERNEL: |
| 2657 | if (kernel_domain) { |
| 2658 | /* Same domain seen twice, invalid! */ |
| 2659 | goto domain_init_error; |
| 2660 | } |
| 2661 | kernel_domain = domain; |
| 2662 | break; |
| 2663 | case LTTNG_DOMAIN_UST: |
| 2664 | if (ust_domain) { |
| 2665 | /* Same domain seen twice, invalid! */ |
| 2666 | goto domain_init_error; |
| 2667 | } |
| 2668 | ust_domain = domain; |
| 2669 | break; |
| 2670 | case LTTNG_DOMAIN_JUL: |
| 2671 | if (jul_domain) { |
| 2672 | /* Same domain seen twice, invalid! */ |
| 2673 | goto domain_init_error; |
| 2674 | } |
| 2675 | jul_domain = domain; |
| 2676 | break; |
| 2677 | case LTTNG_DOMAIN_LOG4J: |
| 2678 | if (log4j_domain) { |
| 2679 | /* Same domain seen twice, invalid! */ |
| 2680 | goto domain_init_error; |
| 2681 | } |
| 2682 | log4j_domain = domain; |
| 2683 | break; |
| 2684 | case LTTNG_DOMAIN_PYTHON: |
| 2685 | if (python_domain) { |
| 2686 | /* Same domain seen twice, invalid! */ |
| 2687 | goto domain_init_error; |
| 2688 | } |
| 2689 | python_domain = domain; |
| 2690 | break; |
| 2691 | default: |
| 2692 | WARN("Invalid domain type"); |
| 2693 | goto domain_init_error; |
| 2694 | } |
| 2695 | continue; |
| 2696 | domain_init_error: |
| 2697 | free(domain); |
| 2698 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; |
| 2699 | goto error; |
| 2700 | } |
| 2701 | |
| 2702 | if (override) { |
| 2703 | /* Destroy session if it exists */ |
| 2704 | ret = lttng_destroy_session((const char *) name); |
| 2705 | if (ret && ret != -LTTNG_ERR_SESS_NOT_FOUND) { |
| 2706 | ERR("Failed to destroy existing session."); |
| 2707 | goto error; |
| 2708 | } |
| 2709 | } |
| 2710 | |
| 2711 | /* Create session type depending on output type */ |
| 2712 | if (snapshot_mode && snapshot_mode != -1) { |
| 2713 | ret = create_snapshot_session((const char *) name, output_node); |
| 2714 | } else if (live_timer_interval && |
| 2715 | live_timer_interval != UINT64_MAX) { |
| 2716 | ret = create_session((const char *) name, kernel_domain, |
| 2717 | ust_domain, jul_domain, log4j_domain, |
| 2718 | output_node, live_timer_interval); |
| 2719 | } else { |
| 2720 | /* regular session */ |
| 2721 | ret = create_session((const char *) name, kernel_domain, |
| 2722 | ust_domain, jul_domain, log4j_domain, |
| 2723 | output_node, UINT64_MAX); |
| 2724 | } |
| 2725 | if (ret) { |
| 2726 | goto error; |
| 2727 | } |
| 2728 | |
| 2729 | if (shm_path) { |
| 2730 | ret = lttng_set_session_shm_path((const char *) name, |
| 2731 | (const char *) shm_path); |
| 2732 | if (ret) { |
| 2733 | goto error; |
| 2734 | } |
| 2735 | } |
| 2736 | |
| 2737 | for (node = xmlFirstElementChild(domains_node); node; |
| 2738 | node = xmlNextElementSibling(node)) { |
| 2739 | ret = process_domain_node(node, (const char *) name, |
| 2740 | snapshot_mode == 1); |
| 2741 | if (ret) { |
| 2742 | goto end; |
| 2743 | } |
| 2744 | } |
| 2745 | |
| 2746 | if (started) { |
| 2747 | ret = lttng_start_tracing((const char *) name); |
| 2748 | if (ret) { |
| 2749 | goto end; |
| 2750 | } |
| 2751 | } |
| 2752 | |
| 2753 | end: |
| 2754 | if (ret < 0) { |
| 2755 | ERR("Failed to load session %s: %s", (const char *) name, |
| 2756 | lttng_strerror(ret)); |
| 2757 | lttng_destroy_session((const char *) name); |
| 2758 | } |
| 2759 | |
| 2760 | error: |
| 2761 | free(kernel_domain); |
| 2762 | free(ust_domain); |
| 2763 | free(jul_domain); |
| 2764 | free(log4j_domain); |
| 2765 | free(python_domain); |
| 2766 | xmlFree(name); |
| 2767 | xmlFree(shm_path); |
| 2768 | return ret; |
| 2769 | } |
| 2770 | |
| 2771 | /* |
| 2772 | * Return 1 if the given path is readable by the current UID or 0 if not. |
| 2773 | * Return -1 if the path is EPERM. |
| 2774 | */ |
| 2775 | static int validate_file_read_creds(const char *path) |
| 2776 | { |
| 2777 | int ret; |
| 2778 | |
| 2779 | assert(path); |
| 2780 | |
| 2781 | /* Can we read the file. */ |
| 2782 | ret = access(path, R_OK); |
| 2783 | if (!ret) { |
| 2784 | goto valid; |
| 2785 | } |
| 2786 | if (errno == EACCES) { |
| 2787 | return -1; |
| 2788 | } else { |
| 2789 | /* Invalid. */ |
| 2790 | return 0; |
| 2791 | } |
| 2792 | valid: |
| 2793 | return 1; |
| 2794 | } |
| 2795 | |
| 2796 | static |
| 2797 | int load_session_from_file(const char *path, const char *session_name, |
| 2798 | struct session_config_validation_ctx *validation_ctx, int override) |
| 2799 | { |
| 2800 | int ret, session_found = !session_name; |
| 2801 | xmlDocPtr doc = NULL; |
| 2802 | xmlNodePtr sessions_node; |
| 2803 | xmlNodePtr session_node; |
| 2804 | |
| 2805 | assert(path); |
| 2806 | assert(validation_ctx); |
| 2807 | |
| 2808 | ret = validate_file_read_creds(path); |
| 2809 | if (ret != 1) { |
| 2810 | if (ret == -1) { |
| 2811 | ret = -LTTNG_ERR_EPERM; |
| 2812 | } else { |
| 2813 | ret = -LTTNG_ERR_LOAD_SESSION_NOENT; |
| 2814 | } |
| 2815 | goto end; |
| 2816 | } |
| 2817 | |
| 2818 | doc = xmlParseFile(path); |
| 2819 | if (!doc) { |
| 2820 | ret = -LTTNG_ERR_LOAD_IO_FAIL; |
| 2821 | goto end; |
| 2822 | } |
| 2823 | |
| 2824 | ret = xmlSchemaValidateDoc(validation_ctx->schema_validation_ctx, doc); |
| 2825 | if (ret) { |
| 2826 | ERR("Session configuration file validation failed"); |
| 2827 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; |
| 2828 | goto end; |
| 2829 | } |
| 2830 | |
| 2831 | sessions_node = xmlDocGetRootElement(doc); |
| 2832 | if (!sessions_node) { |
| 2833 | goto end; |
| 2834 | } |
| 2835 | |
| 2836 | for (session_node = xmlFirstElementChild(sessions_node); |
| 2837 | session_node; session_node = |
| 2838 | xmlNextElementSibling(session_node)) { |
| 2839 | ret = process_session_node(session_node, |
| 2840 | session_name, override); |
| 2841 | if (session_name && ret == 0) { |
| 2842 | /* Target session found and loaded */ |
| 2843 | session_found = 1; |
| 2844 | break; |
| 2845 | } |
| 2846 | } |
| 2847 | end: |
| 2848 | xmlFreeDoc(doc); |
| 2849 | if (!ret) { |
| 2850 | ret = session_found ? 0 : -LTTNG_ERR_LOAD_SESSION_NOENT; |
| 2851 | } |
| 2852 | return ret; |
| 2853 | } |
| 2854 | |
| 2855 | static |
| 2856 | int load_session_from_document(struct config_document *document, const char *session_name, |
| 2857 | struct session_config_validation_ctx *validation_ctx, int override) |
| 2858 | { |
| 2859 | int ret, session_found = !session_name; |
| 2860 | xmlNodePtr sessions_node; |
| 2861 | xmlNodePtr session_node; |
| 2862 | |
| 2863 | assert(validation_ctx); |
| 2864 | |
| 2865 | ret = xmlSchemaValidateDoc(validation_ctx->schema_validation_ctx, document->document); |
| 2866 | if (ret) { |
| 2867 | ERR("Session configuration file validation failed"); |
| 2868 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; |
| 2869 | goto end; |
| 2870 | } |
| 2871 | |
| 2872 | sessions_node = xmlDocGetRootElement(document->document); |
| 2873 | if (!sessions_node) { |
| 2874 | goto end; |
| 2875 | } |
| 2876 | |
| 2877 | for (session_node = xmlFirstElementChild(sessions_node); |
| 2878 | session_node; session_node = |
| 2879 | xmlNextElementSibling(session_node)) { |
| 2880 | ret = process_session_node(session_node, |
| 2881 | session_name, override); |
| 2882 | if (session_name && ret == 0) { |
| 2883 | /* Target session found and loaded */ |
| 2884 | session_found = 1; |
| 2885 | break; |
| 2886 | } |
| 2887 | } |
| 2888 | end: |
| 2889 | if (!ret) { |
| 2890 | ret = session_found ? 0 : -LTTNG_ERR_LOAD_SESSION_NOENT; |
| 2891 | } |
| 2892 | return ret; |
| 2893 | } |
| 2894 | |
| 2895 | /* Allocate dirent as recommended by READDIR(3), NOTES on readdir_r */ |
| 2896 | static |
| 2897 | struct dirent *alloc_dirent(const char *path) |
| 2898 | { |
| 2899 | size_t len; |
| 2900 | long name_max; |
| 2901 | struct dirent *entry; |
| 2902 | |
| 2903 | name_max = pathconf(path, _PC_NAME_MAX); |
| 2904 | if (name_max == -1) { |
| 2905 | name_max = PATH_MAX; |
| 2906 | } |
| 2907 | len = offsetof(struct dirent, d_name) + name_max + 1; |
| 2908 | entry = zmalloc(len); |
| 2909 | return entry; |
| 2910 | } |
| 2911 | |
| 2912 | static |
| 2913 | int load_session_from_path(const char *path, const char *session_name, |
| 2914 | struct session_config_validation_ctx *validation_ctx, int override) |
| 2915 | { |
| 2916 | int ret, session_found = !session_name; |
| 2917 | DIR *directory = NULL; |
| 2918 | |
| 2919 | assert(path); |
| 2920 | assert(validation_ctx); |
| 2921 | |
| 2922 | directory = opendir(path); |
| 2923 | if (!directory) { |
| 2924 | switch (errno) { |
| 2925 | case ENOTDIR: |
| 2926 | /* Try the file loading. */ |
| 2927 | break; |
| 2928 | case ENOENT: |
| 2929 | ret = -LTTNG_ERR_LOAD_SESSION_NOENT; |
| 2930 | goto end; |
| 2931 | default: |
| 2932 | ret = -LTTNG_ERR_LOAD_IO_FAIL; |
| 2933 | goto end; |
| 2934 | } |
| 2935 | } |
| 2936 | if (directory) { |
| 2937 | struct dirent *entry; |
| 2938 | struct dirent *result; |
| 2939 | char *file_path = NULL; |
| 2940 | size_t path_len = strlen(path); |
| 2941 | |
| 2942 | if (path_len >= PATH_MAX) { |
| 2943 | ret = -LTTNG_ERR_INVALID; |
| 2944 | goto end; |
| 2945 | } |
| 2946 | |
| 2947 | entry = alloc_dirent(path); |
| 2948 | if (!entry) { |
| 2949 | ret = -LTTNG_ERR_NOMEM; |
| 2950 | goto end; |
| 2951 | } |
| 2952 | |
| 2953 | file_path = zmalloc(PATH_MAX); |
| 2954 | if (!file_path) { |
| 2955 | ret = -LTTNG_ERR_NOMEM; |
| 2956 | free(entry); |
| 2957 | goto end; |
| 2958 | } |
| 2959 | |
| 2960 | strncpy(file_path, path, path_len); |
| 2961 | if (file_path[path_len - 1] != '/') { |
| 2962 | file_path[path_len++] = '/'; |
| 2963 | } |
| 2964 | |
| 2965 | ret = 0; |
| 2966 | /* Search for *.lttng files */ |
| 2967 | while (!readdir_r(directory, entry, &result) && result) { |
| 2968 | size_t file_name_len = strlen(result->d_name); |
| 2969 | |
| 2970 | if (file_name_len <= |
| 2971 | sizeof(DEFAULT_SESSION_CONFIG_FILE_EXTENSION)) { |
| 2972 | continue; |
| 2973 | } |
| 2974 | |
| 2975 | if (path_len + file_name_len >= PATH_MAX) { |
| 2976 | continue; |
| 2977 | } |
| 2978 | |
| 2979 | if (strcmp(DEFAULT_SESSION_CONFIG_FILE_EXTENSION, |
| 2980 | result->d_name + file_name_len - sizeof( |
| 2981 | DEFAULT_SESSION_CONFIG_FILE_EXTENSION) + 1)) { |
| 2982 | continue; |
| 2983 | } |
| 2984 | |
| 2985 | strncpy(file_path + path_len, result->d_name, file_name_len); |
| 2986 | file_path[path_len + file_name_len] = '\0'; |
| 2987 | |
| 2988 | ret = load_session_from_file(file_path, session_name, |
| 2989 | validation_ctx, override); |
| 2990 | if (session_name && !ret) { |
| 2991 | session_found = 1; |
| 2992 | break; |
| 2993 | } |
| 2994 | } |
| 2995 | |
| 2996 | free(entry); |
| 2997 | free(file_path); |
| 2998 | } else { |
| 2999 | ret = load_session_from_file(path, session_name, |
| 3000 | validation_ctx, override); |
| 3001 | if (ret) { |
| 3002 | goto end; |
| 3003 | } else { |
| 3004 | session_found = 1; |
| 3005 | } |
| 3006 | } |
| 3007 | |
| 3008 | end: |
| 3009 | if (directory) { |
| 3010 | if (closedir(directory)) { |
| 3011 | PERROR("closedir"); |
| 3012 | } |
| 3013 | } |
| 3014 | |
| 3015 | if (session_found) { |
| 3016 | ret = 0; |
| 3017 | } |
| 3018 | |
| 3019 | return ret; |
| 3020 | } |
| 3021 | |
| 3022 | /* |
| 3023 | * Validate that the given path's credentials and the current process have the |
| 3024 | * same UID. If so, return 1 else return 0 if it does NOT match. |
| 3025 | */ |
| 3026 | static int validate_path_creds(const char *path) |
| 3027 | { |
| 3028 | int ret, uid = getuid(); |
| 3029 | struct stat buf; |
| 3030 | |
| 3031 | assert(path); |
| 3032 | |
| 3033 | if (uid == 0) { |
| 3034 | goto valid; |
| 3035 | } |
| 3036 | |
| 3037 | ret = stat(path, &buf); |
| 3038 | if (ret < 0) { |
| 3039 | if (errno != ENOENT) { |
| 3040 | PERROR("stat"); |
| 3041 | } |
| 3042 | ret = -LTTNG_ERR_INVALID; |
| 3043 | goto valid; |
| 3044 | } |
| 3045 | |
| 3046 | if (buf.st_uid != uid) { |
| 3047 | goto invalid; |
| 3048 | } |
| 3049 | |
| 3050 | valid: |
| 3051 | return 1; |
| 3052 | invalid: |
| 3053 | return 0; |
| 3054 | } |
| 3055 | |
| 3056 | LTTNG_HIDDEN |
| 3057 | int config_load_session(const char *path, const char *session_name, |
| 3058 | int override, unsigned int autoload) |
| 3059 | { |
| 3060 | int ret; |
| 3061 | bool session_loaded = false; |
| 3062 | const char *path_ptr = NULL; |
| 3063 | struct session_config_validation_ctx validation_ctx = { 0 }; |
| 3064 | |
| 3065 | ret = init_session_config_validation_ctx(&validation_ctx); |
| 3066 | if (ret) { |
| 3067 | goto end; |
| 3068 | } |
| 3069 | |
| 3070 | if (!path) { |
| 3071 | char *home_path; |
| 3072 | const char *sys_path; |
| 3073 | |
| 3074 | /* Try home path */ |
| 3075 | home_path = utils_get_home_dir(); |
| 3076 | if (home_path) { |
| 3077 | char path[PATH_MAX]; |
| 3078 | |
| 3079 | /* |
| 3080 | * Try user session configuration path. Ignore error here so we can |
| 3081 | * continue loading the system wide sessions. |
| 3082 | */ |
| 3083 | if (autoload) { |
| 3084 | ret = snprintf(path, sizeof(path), |
| 3085 | DEFAULT_SESSION_HOME_CONFIGPATH "/" |
| 3086 | DEFAULT_SESSION_CONFIG_AUTOLOAD, home_path); |
| 3087 | if (ret < 0) { |
| 3088 | PERROR("snprintf session autoload home config path"); |
| 3089 | goto end; |
| 3090 | } |
| 3091 | |
| 3092 | /* |
| 3093 | * Credentials are only validated for the autoload in order to |
| 3094 | * avoid any user session daemon to try to load kernel sessions |
| 3095 | * automatically and failing all the times. |
| 3096 | */ |
| 3097 | ret = validate_path_creds(path); |
| 3098 | if (ret) { |
| 3099 | path_ptr = path; |
| 3100 | } |
| 3101 | } else { |
| 3102 | ret = snprintf(path, sizeof(path), |
| 3103 | DEFAULT_SESSION_HOME_CONFIGPATH, home_path); |
| 3104 | if (ret < 0) { |
| 3105 | PERROR("snprintf session home config path"); |
| 3106 | goto end; |
| 3107 | } |
| 3108 | path_ptr = path; |
| 3109 | } |
| 3110 | if (path_ptr) { |
| 3111 | ret = load_session_from_path(path_ptr, session_name, |
| 3112 | &validation_ctx, override); |
| 3113 | if (ret && ret != -LTTNG_ERR_LOAD_SESSION_NOENT) { |
| 3114 | goto end; |
| 3115 | } |
| 3116 | /* |
| 3117 | * Continue even if the session was found since we have to try |
| 3118 | * the system wide sessions. |
| 3119 | */ |
| 3120 | session_loaded = true; |
| 3121 | } |
| 3122 | } |
| 3123 | |
| 3124 | /* Reset path pointer for the system wide dir. */ |
| 3125 | path_ptr = NULL; |
| 3126 | |
| 3127 | /* Try system wide configuration directory. */ |
| 3128 | if (autoload) { |
| 3129 | sys_path = DEFAULT_SESSION_SYSTEM_CONFIGPATH "/" |
| 3130 | DEFAULT_SESSION_CONFIG_AUTOLOAD; |
| 3131 | ret = validate_path_creds(sys_path); |
| 3132 | if (ret) { |
| 3133 | path_ptr = sys_path; |
| 3134 | } |
| 3135 | } else { |
| 3136 | sys_path = DEFAULT_SESSION_SYSTEM_CONFIGPATH; |
| 3137 | path_ptr = sys_path; |
| 3138 | } |
| 3139 | |
| 3140 | if (path_ptr) { |
| 3141 | ret = load_session_from_path(path_ptr, session_name, |
| 3142 | &validation_ctx, override); |
| 3143 | if (!ret) { |
| 3144 | session_loaded = true; |
| 3145 | } |
| 3146 | } |
| 3147 | } else { |
| 3148 | ret = access(path, F_OK); |
| 3149 | if (ret < 0) { |
| 3150 | PERROR("access"); |
| 3151 | switch (errno) { |
| 3152 | case ENOENT: |
| 3153 | ret = -LTTNG_ERR_INVALID; |
| 3154 | WARN("Session configuration path does not exist."); |
| 3155 | break; |
| 3156 | case EACCES: |
| 3157 | ret = -LTTNG_ERR_EPERM; |
| 3158 | break; |
| 3159 | default: |
| 3160 | ret = -LTTNG_ERR_UNK; |
| 3161 | break; |
| 3162 | } |
| 3163 | goto end; |
| 3164 | } |
| 3165 | |
| 3166 | ret = load_session_from_path(path, session_name, |
| 3167 | &validation_ctx, override); |
| 3168 | } |
| 3169 | end: |
| 3170 | fini_session_config_validation_ctx(&validation_ctx); |
| 3171 | if (ret == -LTTNG_ERR_LOAD_SESSION_NOENT && !session_name && !path) { |
| 3172 | /* |
| 3173 | * Don't report an error if no sessions are found when called |
| 3174 | * without a session_name or a search path. |
| 3175 | */ |
| 3176 | ret = 0; |
| 3177 | } |
| 3178 | |
| 3179 | if (session_loaded && ret == -LTTNG_ERR_LOAD_SESSION_NOENT) { |
| 3180 | /* A matching session was found in one of the search paths. */ |
| 3181 | ret = 0; |
| 3182 | } |
| 3183 | return ret; |
| 3184 | } |
| 3185 | |
| 3186 | static |
| 3187 | void __attribute__((destructor)) session_config_exit(void) |
| 3188 | { |
| 3189 | xmlCleanupParser(); |
| 3190 | } |
| 3191 | |
| 3192 | LTTNG_HIDDEN |
| 3193 | struct config_document *config_document_get(const char *path) |
| 3194 | { |
| 3195 | int ret; |
| 3196 | struct config_document *document = NULL; |
| 3197 | struct session_config_validation_ctx validation_ctx = { 0 }; |
| 3198 | |
| 3199 | assert(path); |
| 3200 | |
| 3201 | ret = access(path, F_OK); |
| 3202 | if (ret < 0) { |
| 3203 | PERROR("access"); |
| 3204 | switch (errno) { |
| 3205 | case ENOENT: |
| 3206 | ERR("Configuration document path does not exist."); |
| 3207 | break; |
| 3208 | case EACCES: |
| 3209 | ERR("Configuration document permission denied."); |
| 3210 | break; |
| 3211 | default: |
| 3212 | ERR("Configuration document unknown error."); |
| 3213 | break; |
| 3214 | } |
| 3215 | goto end; |
| 3216 | } |
| 3217 | |
| 3218 | ret = init_session_config_validation_ctx(&validation_ctx); |
| 3219 | if (ret) { |
| 3220 | goto end; |
| 3221 | } |
| 3222 | |
| 3223 | ret = validate_file_read_creds(path); |
| 3224 | if (ret != 1) { |
| 3225 | if (ret == -1) { |
| 3226 | ERR("Configuration document permission denied."); |
| 3227 | } else { |
| 3228 | ERR("Configuration document does not exist."); |
| 3229 | } |
| 3230 | goto end; |
| 3231 | } |
| 3232 | |
| 3233 | document = zmalloc(sizeof(struct config_document)); |
| 3234 | if (!document) { |
| 3235 | PERROR("zmalloc"); |
| 3236 | goto end; |
| 3237 | } |
| 3238 | |
| 3239 | /* |
| 3240 | * Do not care of blanks and also make sure that direct dump have no |
| 3241 | * indentations in them |
| 3242 | */ |
| 3243 | xmlKeepBlanksDefault(0); |
| 3244 | document->document = xmlParseFile(path); |
| 3245 | if (!document->document) { |
| 3246 | ERR("Configuration document parsing failed."); |
| 3247 | goto error; |
| 3248 | } |
| 3249 | |
| 3250 | ret = xmlSchemaValidateDoc(validation_ctx.schema_validation_ctx, |
| 3251 | document->document); |
| 3252 | if (ret) { |
| 3253 | ERR("Session configuration file validation failed"); |
| 3254 | goto error; |
| 3255 | } |
| 3256 | |
| 3257 | end: |
| 3258 | fini_session_config_validation_ctx(&validation_ctx); |
| 3259 | return document; |
| 3260 | error: |
| 3261 | xmlFreeDoc(document->document); |
| 3262 | free(document); |
| 3263 | return NULL; |
| 3264 | } |
| 3265 | |
| 3266 | LTTNG_HIDDEN |
| 3267 | void config_document_free(struct config_document *document) |
| 3268 | { |
| 3269 | if (document) { |
| 3270 | xmlFreeDoc(document->document); |
| 3271 | document->document = NULL; |
| 3272 | } |
| 3273 | |
| 3274 | free(document); |
| 3275 | } |
| 3276 | |
| 3277 | LTTNG_HIDDEN |
| 3278 | int config_document_replace_element_value(struct config_document *document, |
| 3279 | const char *xpath, const char *value) |
| 3280 | { |
| 3281 | int ret = 0; |
| 3282 | int xpath_result_size; |
| 3283 | |
| 3284 | xmlXPathContextPtr xpath_context = NULL; |
| 3285 | xmlXPathObjectPtr xpath_object = NULL; |
| 3286 | xmlNodeSetPtr xpath_result_set = NULL; |
| 3287 | xmlChar *internal_xpath = NULL; |
| 3288 | xmlChar *internal_value = NULL; |
| 3289 | |
| 3290 | assert(document); |
| 3291 | assert(xpath); |
| 3292 | assert(value); |
| 3293 | |
| 3294 | internal_xpath = encode_string(xpath); |
| 3295 | if (!internal_xpath) { |
| 3296 | ret = -LTTNG_ERR_NOMEM; |
| 3297 | ERR("Unable to encode xpath string"); |
| 3298 | goto end; |
| 3299 | } |
| 3300 | |
| 3301 | internal_value = encode_string(value); |
| 3302 | if (!internal_value) { |
| 3303 | ret = -LTTNG_ERR_NOMEM; |
| 3304 | ERR("Unable to encode xpath replace value string"); |
| 3305 | goto end; |
| 3306 | } |
| 3307 | |
| 3308 | /* Initialize xpath context */ |
| 3309 | xpath_context = xmlXPathNewContext(document->document); |
| 3310 | if (!xpath_context) { |
| 3311 | ret = -LTTNG_ERR_NOMEM; |
| 3312 | ERR("Unable to create xpath context"); |
| 3313 | goto end; |
| 3314 | } |
| 3315 | |
| 3316 | /* Evaluate de xpath expression */ |
| 3317 | xpath_object = xmlXPathEvalExpression(internal_xpath, xpath_context); |
| 3318 | if (!xpath_object) { |
| 3319 | ret = -LTTNG_ERR_CONFIG_INVALID_QUERY; |
| 3320 | goto end; |
| 3321 | } |
| 3322 | |
| 3323 | /* TODO: from here could be extracted and previopus could be a step in |
| 3324 | * subsequent operation, modify/substitute/delete node. |
| 3325 | */ |
| 3326 | xpath_result_set = xpath_object->nodesetval; |
| 3327 | if (!xpath_result_set) { |
| 3328 | ret = -LTTNG_ERR_CONFIG_EMPTY_SET; |
| 3329 | goto end; |
| 3330 | } |
| 3331 | |
| 3332 | xpath_result_size = xpath_result_set->nodeNr; |
| 3333 | |
| 3334 | /* |
| 3335 | * Reverse traversal since last element could be nested under parent |
| 3336 | * element present in the result set. |
| 3337 | */ |
| 3338 | for (int i = xpath_result_size - 1; i >=0; i--) { |
| 3339 | assert(xpath_result_set->nodeTab[i]); |
| 3340 | xmlNodeSetContent(xpath_result_set->nodeTab[i], internal_value); |
| 3341 | |
| 3342 | /* |
| 3343 | * Libxml2 quirk regarding the freing and namesplace node see |
| 3344 | * libxml2 example and documentation for more details. |
| 3345 | */ |
| 3346 | if (xpath_result_set->nodeTab[i]->type != XML_NAMESPACE_DECL) { |
| 3347 | xpath_result_set->nodeTab[i] = NULL; |
| 3348 | } |
| 3349 | } |
| 3350 | |
| 3351 | end: |
| 3352 | xmlXPathFreeContext(xpath_context); |
| 3353 | xmlXPathFreeObject(xpath_object); |
| 3354 | xmlFree(internal_xpath); |
| 3355 | xmlFree(internal_value); |
| 3356 | return ret; |
| 3357 | } |
| 3358 | |
| 3359 | LTTNG_HIDDEN |
| 3360 | int config_load_configuration_sessions(struct config_document *document, |
| 3361 | const char *session_name, int override) |
| 3362 | { |
| 3363 | int ret; |
| 3364 | struct session_config_validation_ctx validation_ctx = { 0 }; |
| 3365 | |
| 3366 | ret = init_session_config_validation_ctx(&validation_ctx); |
| 3367 | if (ret) { |
| 3368 | goto end; |
| 3369 | } |
| 3370 | ret = load_session_from_document(document, session_name, |
| 3371 | &validation_ctx, override); |
| 3372 | end: |
| 3373 | fini_session_config_validation_ctx(&validation_ctx); |
| 3374 | return ret; |
| 3375 | } |
| 3376 | |
| 3377 | LTTNG_HIDDEN |
| 3378 | int config_document_replace_element(struct config_document *document, |
| 3379 | const char *xpath, const struct config_element *element) |
| 3380 | { |
| 3381 | int ret = 0; |
| 3382 | int xpath_result_size; |
| 3383 | |
| 3384 | xmlXPathContextPtr xpath_context = NULL; |
| 3385 | xmlXPathObjectPtr xpath_object = NULL; |
| 3386 | xmlNodeSetPtr xpath_result_set = NULL; |
| 3387 | xmlChar *internal_xpath = NULL; |
| 3388 | xmlNodePtr old_node = NULL; |
| 3389 | xmlNodePtr copy = NULL; |
| 3390 | |
| 3391 | assert(document); |
| 3392 | assert(xpath); |
| 3393 | assert(element); |
| 3394 | assert(element->element); |
| 3395 | |
| 3396 | internal_xpath = encode_string(xpath); |
| 3397 | if (!internal_xpath) { |
| 3398 | ret = -LTTNG_ERR_NOMEM; |
| 3399 | ERR("Unable to encode xpath string"); |
| 3400 | goto end; |
| 3401 | } |
| 3402 | |
| 3403 | /* Initialize xpath context */ |
| 3404 | xpath_context = xmlXPathNewContext(document->document); |
| 3405 | if (!xpath_context) { |
| 3406 | ret = -LTTNG_ERR_NOMEM; |
| 3407 | ERR("Unable to create xpath context"); |
| 3408 | goto end; |
| 3409 | } |
| 3410 | |
| 3411 | /* Evaluate the xpath expression */ |
| 3412 | xpath_object = xmlXPathEvalExpression(internal_xpath, xpath_context); |
| 3413 | if (!xpath_object) { |
| 3414 | ret = -LTTNG_ERR_CONFIG_INVALID_QUERY; |
| 3415 | goto end; |
| 3416 | } |
| 3417 | |
| 3418 | xpath_result_set = xpath_object->nodesetval; |
| 3419 | if (!xpath_result_set) { |
| 3420 | ret = -LTTNG_ERR_CONFIG_EMPTY_SET; |
| 3421 | goto end; |
| 3422 | } |
| 3423 | |
| 3424 | xpath_result_size = xpath_result_set->nodeNr; |
| 3425 | |
| 3426 | if (xpath_result_size > 1) { |
| 3427 | ret = -LTTNG_ERR_CONFIG_INVALID_COUNT; |
| 3428 | goto end; |
| 3429 | } |
| 3430 | |
| 3431 | if (xpath_result_size == 0) { |
| 3432 | ret = -LTTNG_ERR_CONFIG_INVALID_COUNT; |
| 3433 | goto end; |
| 3434 | } |
| 3435 | |
| 3436 | assert(xpath_result_set->nodeTab[0]); |
| 3437 | |
| 3438 | /* Do a copy of the element to ease caller memory management */ |
| 3439 | copy = xmlCopyNode(element->element, 1); |
| 3440 | if (!copy) { |
| 3441 | ret = -LTTNG_ERR_NOMEM; |
| 3442 | goto end; |
| 3443 | } |
| 3444 | |
| 3445 | old_node = xmlReplaceNode(xpath_result_set->nodeTab[0], copy); |
| 3446 | if (xpath_result_set->nodeTab[0]->type != XML_NAMESPACE_DECL) |
| 3447 | xpath_result_set->nodeTab[0] = NULL; |
| 3448 | if (!old_node) { |
| 3449 | ret = -LTTNG_ERR_CONFIG_REPLACEMENT; |
| 3450 | xmlFreeNode(copy); |
| 3451 | goto end; |
| 3452 | } |
| 3453 | xmlUnlinkNode(old_node); |
| 3454 | xmlFreeNode(old_node); |
| 3455 | end: |
| 3456 | xmlXPathFreeContext(xpath_context); |
| 3457 | xmlXPathFreeObject(xpath_object); |
| 3458 | xmlFree(internal_xpath); |
| 3459 | return ret; |
| 3460 | } |
| 3461 | |
| 3462 | LTTNG_HIDDEN |
| 3463 | char *config_document_get_element_value(struct config_document *document, |
| 3464 | const char *xpath) |
| 3465 | { |
| 3466 | char *value = NULL; |
| 3467 | int xpath_result_size; |
| 3468 | int value_result_size; |
| 3469 | |
| 3470 | xmlXPathContextPtr xpath_context = NULL; |
| 3471 | xmlXPathObjectPtr xpath_object = NULL; |
| 3472 | xmlNodeSetPtr xpath_result_set = NULL; |
| 3473 | xmlChar *internal_xpath = NULL; |
| 3474 | xmlChar *internal_value = NULL; |
| 3475 | |
| 3476 | assert(document); |
| 3477 | assert(xpath); |
| 3478 | |
| 3479 | internal_xpath = encode_string(xpath); |
| 3480 | if (!internal_xpath) { |
| 3481 | value = NULL; |
| 3482 | ERR("Unable to encode xpath string"); |
| 3483 | goto end; |
| 3484 | } |
| 3485 | |
| 3486 | /* Initialize xpath context */ |
| 3487 | xpath_context = xmlXPathNewContext(document->document); |
| 3488 | if (!xpath_context) { |
| 3489 | value = NULL; |
| 3490 | ERR("Unable to create xpath context"); |
| 3491 | goto end; |
| 3492 | } |
| 3493 | |
| 3494 | /* Evaluate the xpath expression */ |
| 3495 | xpath_object = xmlXPathEvalExpression(internal_xpath, xpath_context); |
| 3496 | if (!xpath_object) { |
| 3497 | value = NULL; |
| 3498 | ERR("Unable to evaluate xpath query (invalid query format)"); |
| 3499 | goto end; |
| 3500 | } |
| 3501 | |
| 3502 | xpath_result_set = xpath_object->nodesetval; |
| 3503 | if (!xpath_result_set) { |
| 3504 | value = NULL; |
| 3505 | goto end; |
| 3506 | } |
| 3507 | |
| 3508 | xpath_result_size = xpath_result_set->nodeNr; |
| 3509 | |
| 3510 | if (xpath_result_size > 1) { |
| 3511 | ERR("To many result while fetching config element value"); |
| 3512 | value = NULL; |
| 3513 | goto end; |
| 3514 | } |
| 3515 | |
| 3516 | if (xpath_result_size == 0) { |
| 3517 | value = NULL; |
| 3518 | goto end; |
| 3519 | } |
| 3520 | |
| 3521 | /* |
| 3522 | * Reverse traversal since last element could be nested under parent |
| 3523 | * element present in the result set. |
| 3524 | */ |
| 3525 | assert(xpath_result_set->nodeTab[0]); |
| 3526 | internal_value = xmlNodeGetContent(xpath_result_set->nodeTab[0]); |
| 3527 | if (!internal_value) { |
| 3528 | value = NULL; |
| 3529 | goto end; |
| 3530 | } |
| 3531 | |
| 3532 | value_result_size = xmlStrlen(internal_value); |
| 3533 | value = calloc(value_result_size + 1, sizeof(char)); |
| 3534 | strncpy(value, (char *) internal_value, value_result_size); |
| 3535 | |
| 3536 | end: |
| 3537 | xmlXPathFreeContext(xpath_context); |
| 3538 | xmlXPathFreeObject(xpath_object); |
| 3539 | xmlFree(internal_xpath); |
| 3540 | xmlFree(internal_value); |
| 3541 | return value; |
| 3542 | } |
| 3543 | |
| 3544 | LTTNG_HIDDEN |
| 3545 | int config_document_element_exist(struct config_document *document, |
| 3546 | const char *xpath) |
| 3547 | { |
| 3548 | int exist = 0; |
| 3549 | int xpath_result_size; |
| 3550 | |
| 3551 | xmlXPathContextPtr xpath_context = NULL; |
| 3552 | xmlXPathObjectPtr xpath_object = NULL; |
| 3553 | xmlNodeSetPtr xpath_result_set = NULL; |
| 3554 | xmlChar *internal_xpath = NULL; |
| 3555 | |
| 3556 | assert(document); |
| 3557 | assert(document->document); |
| 3558 | assert(xpath); |
| 3559 | |
| 3560 | internal_xpath = encode_string(xpath); |
| 3561 | if (!internal_xpath) { |
| 3562 | ERR("Unable to encode xpath string"); |
| 3563 | goto end; |
| 3564 | } |
| 3565 | |
| 3566 | /* Initialize xpath context */ |
| 3567 | xpath_context = xmlXPathNewContext(document->document); |
| 3568 | if (!xpath_context) { |
| 3569 | ERR("Unable to create xpath context"); |
| 3570 | goto end; |
| 3571 | } |
| 3572 | |
| 3573 | /* Evaluate the xpath expression */ |
| 3574 | xpath_object = xmlXPathEvalExpression(internal_xpath, xpath_context); |
| 3575 | if (!xpath_object) { |
| 3576 | ERR("Unable to evaluate xpath query (invalid query format)"); |
| 3577 | goto end; |
| 3578 | } |
| 3579 | |
| 3580 | xpath_result_set = xpath_object->nodesetval; |
| 3581 | if (!xpath_result_set) { |
| 3582 | goto end; |
| 3583 | } |
| 3584 | |
| 3585 | xpath_result_size = xpath_result_set->nodeNr; |
| 3586 | |
| 3587 | if (xpath_result_size > 0) { |
| 3588 | exist = 1; |
| 3589 | } |
| 3590 | end: |
| 3591 | xmlXPathFreeContext(xpath_context); |
| 3592 | xmlXPathFreeObject(xpath_object); |
| 3593 | xmlFree(internal_xpath); |
| 3594 | return exist; |
| 3595 | |
| 3596 | } |
| 3597 | |
| 3598 | LTTNG_HIDDEN |
| 3599 | struct config_element *config_element_create(const char *name, |
| 3600 | const char* value) |
| 3601 | { |
| 3602 | struct config_element *element; |
| 3603 | |
| 3604 | assert(name); |
| 3605 | |
| 3606 | xmlChar *internal_name = NULL; |
| 3607 | xmlChar *internal_value = NULL; |
| 3608 | |
| 3609 | internal_name = encode_string(name); |
| 3610 | if (!internal_name) { |
| 3611 | ERR("Unable to encode config element name string"); |
| 3612 | element = NULL; |
| 3613 | goto end; |
| 3614 | } |
| 3615 | |
| 3616 | |
| 3617 | if (value) { |
| 3618 | internal_value = encode_string(value); |
| 3619 | if (!internal_value) { |
| 3620 | ERR("Unable to encode config_element value string"); |
| 3621 | element = NULL; |
| 3622 | goto end; |
| 3623 | } |
| 3624 | } |
| 3625 | |
| 3626 | element = zmalloc(sizeof(struct config_element)); |
| 3627 | if (!element) { |
| 3628 | goto end; |
| 3629 | } |
| 3630 | |
| 3631 | element->element = xmlNewNode(NULL, internal_name); |
| 3632 | if (!element->element) { |
| 3633 | free(element); |
| 3634 | element = NULL; |
| 3635 | goto end; |
| 3636 | } |
| 3637 | |
| 3638 | if (internal_value) { |
| 3639 | xmlNodeAddContent(element->element, internal_value); |
| 3640 | } |
| 3641 | end: |
| 3642 | xmlFree(internal_name); |
| 3643 | xmlFree(internal_value); |
| 3644 | return element; |
| 3645 | } |
| 3646 | |
| 3647 | LTTNG_HIDDEN |
| 3648 | int config_element_add_child(struct config_element *parent, |
| 3649 | const struct config_element *child) |
| 3650 | { |
| 3651 | assert(parent); |
| 3652 | assert(child); |
| 3653 | assert(parent->element); |
| 3654 | assert(child->element); |
| 3655 | |
| 3656 | int ret = 0; |
| 3657 | xmlNodePtr node = NULL; |
| 3658 | xmlNodePtr copy = NULL; |
| 3659 | |
| 3660 | /* Do a copy to ease the memory management for caller */ |
| 3661 | copy = xmlCopyNode(child->element, 1); |
| 3662 | if (!copy) { |
| 3663 | ret = -LTTNG_ERR_NOMEM; |
| 3664 | goto error; |
| 3665 | } |
| 3666 | node = xmlAddChild(parent->element, copy); |
| 3667 | if (!node) { |
| 3668 | xmlFreeNode(copy); |
| 3669 | ret = -LTTNG_ERR_CONFIG_ADD_CHILD; |
| 3670 | goto error; |
| 3671 | } |
| 3672 | error: |
| 3673 | return ret; |
| 3674 | } |
| 3675 | |
| 3676 | |
| 3677 | LTTNG_HIDDEN |
| 3678 | int config_document_insert_element(struct config_document *document, |
| 3679 | const char *xpath, const struct config_element *element) |
| 3680 | { |
| 3681 | int ret = 0; |
| 3682 | int xpath_result_size; |
| 3683 | |
| 3684 | xmlXPathContextPtr xpath_context = NULL; |
| 3685 | xmlXPathObjectPtr xpath_object = NULL; |
| 3686 | xmlNodeSetPtr xpath_result_set = NULL; |
| 3687 | xmlChar *internal_xpath = NULL; |
| 3688 | xmlNodePtr child_node = NULL; |
| 3689 | xmlNodePtr local_copy = NULL; |
| 3690 | |
| 3691 | assert(document); |
| 3692 | assert(xpath); |
| 3693 | assert(element); |
| 3694 | assert(element->element); |
| 3695 | |
| 3696 | internal_xpath = encode_string(xpath); |
| 3697 | if (!internal_xpath) { |
| 3698 | ret = -LTTNG_ERR_NOMEM; |
| 3699 | goto end; |
| 3700 | } |
| 3701 | |
| 3702 | /* Initialize xpath context */ |
| 3703 | xpath_context = xmlXPathNewContext(document->document); |
| 3704 | if (!xpath_context) { |
| 3705 | ret = -LTTNG_ERR_NOMEM; |
| 3706 | goto end; |
| 3707 | } |
| 3708 | |
| 3709 | /* Evaluate the xpath expression */ |
| 3710 | xpath_object = xmlXPathEvalExpression(internal_xpath, xpath_context); |
| 3711 | if (!xpath_object) { |
| 3712 | ret = -LTTNG_ERR_CONFIG_INVALID_QUERY; |
| 3713 | goto end; |
| 3714 | } |
| 3715 | |
| 3716 | xpath_result_set = xpath_object->nodesetval; |
| 3717 | if (!xpath_result_set) { |
| 3718 | ret = -LTTNG_ERR_CONFIG_EMPTY_SET; |
| 3719 | goto end; |
| 3720 | } |
| 3721 | |
| 3722 | xpath_result_size = xpath_result_set->nodeNr; |
| 3723 | |
| 3724 | if (xpath_result_size > 1) { |
| 3725 | ret = -LTTNG_ERR_CONFIG_INVALID_COUNT; |
| 3726 | goto end; |
| 3727 | } |
| 3728 | |
| 3729 | if (xpath_result_size == 0) { |
| 3730 | ret = -LTTNG_ERR_CONFIG_INVALID_COUNT; |
| 3731 | goto end; |
| 3732 | } |
| 3733 | |
| 3734 | assert(xpath_result_set->nodeTab[0]); |
| 3735 | /* Do a copy to simply memory management */ |
| 3736 | local_copy = xmlCopyNode(element->element, 1); |
| 3737 | if (!local_copy) { |
| 3738 | ret = -LTTNG_ERR_NOMEM; |
| 3739 | goto end; |
| 3740 | } |
| 3741 | |
| 3742 | child_node = xmlAddChild(xpath_result_set->nodeTab[0], local_copy); |
| 3743 | if (!child_node) { |
| 3744 | ret = -LTTNG_ERR_CONFIG_ADD_CHILD; |
| 3745 | xmlFreeNode(local_copy); |
| 3746 | goto end; |
| 3747 | } |
| 3748 | end: |
| 3749 | xmlXPathFreeContext(xpath_context); |
| 3750 | xmlXPathFreeObject(xpath_object); |
| 3751 | xmlFree(internal_xpath); |
| 3752 | return ret; |
| 3753 | } |
| 3754 | |
| 3755 | LTTNG_HIDDEN |
| 3756 | void config_element_free(struct config_element *element) { |
| 3757 | if (element && element->element) { |
| 3758 | xmlFreeNode(element->element); |
| 3759 | } |
| 3760 | |
| 3761 | free(element); |
| 3762 | } |
| 3763 | |
| 3764 | LTTNG_HIDDEN |
| 3765 | void config_element_free_array(struct config_element **array, int size) { |
| 3766 | |
| 3767 | if (array) { |
| 3768 | for (int i = 0; i < size; i++) { |
| 3769 | if (!array[i]) { |
| 3770 | continue; |
| 3771 | } |
| 3772 | if (array[i]->element) { |
| 3773 | xmlFreeNode(array[i]->element); |
| 3774 | } |
| 3775 | free(array[i]); |
| 3776 | } |
| 3777 | } |
| 3778 | free(array); |
| 3779 | } |
| 3780 | |
| 3781 | LTTNG_HIDDEN |
| 3782 | void config_document_get_element_array(const struct config_document *document, const char *xpath, struct config_element ***element_array, int *array_size) |
| 3783 | { |
| 3784 | int xpath_result_size; |
| 3785 | |
| 3786 | xmlXPathContextPtr xpath_context = NULL; |
| 3787 | xmlXPathObjectPtr xpath_object = NULL; |
| 3788 | xmlNodeSetPtr xpath_result_set = NULL; |
| 3789 | xmlChar *internal_xpath = NULL; |
| 3790 | xmlChar *internal_value = NULL; |
| 3791 | |
| 3792 | assert(document); |
| 3793 | assert(xpath); |
| 3794 | |
| 3795 | *element_array=NULL; |
| 3796 | *array_size=0; |
| 3797 | |
| 3798 | |
| 3799 | internal_xpath = encode_string(xpath); |
| 3800 | if (!internal_xpath) { |
| 3801 | ERR("Unable to encode xpath string"); |
| 3802 | goto end; |
| 3803 | } |
| 3804 | |
| 3805 | /* Initialize xpath context */ |
| 3806 | xpath_context = xmlXPathNewContext(document->document); |
| 3807 | if (!xpath_context) { |
| 3808 | ERR("Unable to create xpath context"); |
| 3809 | goto end; |
| 3810 | } |
| 3811 | |
| 3812 | /* Evaluate the xpath expression */ |
| 3813 | xpath_object = xmlXPathEvalExpression(internal_xpath, xpath_context); |
| 3814 | if (!xpath_object) { |
| 3815 | ERR("Unable to evaluate xpath query (invalid query format)"); |
| 3816 | goto end; |
| 3817 | } |
| 3818 | |
| 3819 | xpath_result_set = xpath_object->nodesetval; |
| 3820 | if (!xpath_result_set) { |
| 3821 | goto end; |
| 3822 | } |
| 3823 | |
| 3824 | xpath_result_size = xpath_result_set->nodeNr; |
| 3825 | |
| 3826 | if (xpath_result_size == 0) { |
| 3827 | goto end; |
| 3828 | } |
| 3829 | |
| 3830 | /* alloc the array */ |
| 3831 | *element_array = calloc(xpath_result_size, sizeof(struct config_element *)); |
| 3832 | *array_size = xpath_result_size; |
| 3833 | if (!element_array) { |
| 3834 | ERR("Calloc config element array"); |
| 3835 | goto end; |
| 3836 | } |
| 3837 | |
| 3838 | for (int i = 0; i < xpath_result_size; i++) { |
| 3839 | xmlNodePtr node_copy = NULL; |
| 3840 | node_copy = xmlCopyNode(xpath_result_set->nodeTab[i], 1); |
| 3841 | if (!node_copy) { |
| 3842 | ERR("Xml copy of event node"); |
| 3843 | goto error; |
| 3844 | } |
| 3845 | /* Hand off ownership */ |
| 3846 | (*element_array)[i] = malloc(sizeof(struct config_element)); |
| 3847 | if (!((*element_array)[i])){ |
| 3848 | ERR("Malloc config_element array"); |
| 3849 | xmlFreeNode(node_copy); |
| 3850 | goto error; |
| 3851 | }; |
| 3852 | (*element_array)[i]->element = node_copy; |
| 3853 | } |
| 3854 | end: |
| 3855 | xmlXPathFreeContext(xpath_context); |
| 3856 | xmlXPathFreeObject(xpath_object); |
| 3857 | xmlFree(internal_xpath); |
| 3858 | xmlFree(internal_value); |
| 3859 | return; |
| 3860 | error: |
| 3861 | |
| 3862 | if (element_array) { |
| 3863 | config_element_free_array(*element_array, *array_size); |
| 3864 | } |
| 3865 | |
| 3866 | *array_size = 0; |
| 3867 | |
| 3868 | xmlXPathFreeContext(xpath_context); |
| 3869 | xmlXPathFreeObject(xpath_object); |
| 3870 | xmlFree(internal_xpath); |
| 3871 | xmlFree(internal_value); |
| 3872 | return; |
| 3873 | } |
| 3874 | |
| 3875 | LTTNG_HIDDEN |
| 3876 | void config_element_get_element_array(const struct config_element *element, const char *xpath, struct config_element ***element_array, int *array_size) |
| 3877 | { |
| 3878 | int xpath_result_size; |
| 3879 | |
| 3880 | xmlXPathContextPtr xpath_context = NULL; |
| 3881 | xmlXPathObjectPtr xpath_object = NULL; |
| 3882 | xmlNodeSetPtr xpath_result_set = NULL; |
| 3883 | xmlChar *internal_xpath = NULL; |
| 3884 | xmlChar *internal_value = NULL; |
| 3885 | xmlNodePtr local_copy = NULL; |
| 3886 | xmlNodePtr place_holder = NULL; |
| 3887 | xmlDocPtr document = NULL; |
| 3888 | |
| 3889 | assert(element); |
| 3890 | assert(element->element); |
| 3891 | assert(xpath); |
| 3892 | |
| 3893 | *element_array=NULL; |
| 3894 | *array_size=0; |
| 3895 | |
| 3896 | /* Create a new doc and set root node as passed element */ |
| 3897 | document = xmlNewDoc(BAD_CAST "1.0"); |
| 3898 | if (!document) { |
| 3899 | ERR("Unable to create xml document"); |
| 3900 | goto end; |
| 3901 | } |
| 3902 | |
| 3903 | local_copy = xmlCopyNode(element->element, 1); |
| 3904 | if (!local_copy) { |
| 3905 | ERR("Unable to copy an xml node"); |
| 3906 | goto end; |
| 3907 | } |
| 3908 | |
| 3909 | /* Hand off the local_copy to the xmlDoc */ |
| 3910 | place_holder = xmlDocSetRootElement(document, local_copy); |
| 3911 | if (place_holder) { |
| 3912 | ERR("The document root was already set"); |
| 3913 | xmlFreeNode(local_copy); |
| 3914 | goto end; |
| 3915 | } |
| 3916 | |
| 3917 | internal_xpath = encode_string(xpath); |
| 3918 | if (!internal_xpath) { |
| 3919 | ERR("Unable to encode xpath string"); |
| 3920 | goto end; |
| 3921 | } |
| 3922 | |
| 3923 | /* Initialize xpath context */ |
| 3924 | xpath_context = xmlXPathNewContext(document); |
| 3925 | if (!xpath_context) { |
| 3926 | ERR("Unable to create xpath context"); |
| 3927 | goto end; |
| 3928 | } |
| 3929 | |
| 3930 | /* Evaluate the xpath expression */ |
| 3931 | xpath_object = xmlXPathEvalExpression(internal_xpath, xpath_context); |
| 3932 | if (!xpath_object) { |
| 3933 | ERR("Unable to evaluate xpath query (invalid query format)"); |
| 3934 | goto end; |
| 3935 | } |
| 3936 | |
| 3937 | xpath_result_set = xpath_object->nodesetval; |
| 3938 | if (!xpath_result_set) { |
| 3939 | goto end; |
| 3940 | } |
| 3941 | |
| 3942 | xpath_result_size = xpath_result_set->nodeNr; |
| 3943 | |
| 3944 | if (xpath_result_size == 0) { |
| 3945 | goto end; |
| 3946 | } |
| 3947 | |
| 3948 | /* alloc the array */ |
| 3949 | *element_array = calloc(xpath_result_size, sizeof(struct config_element *)); |
| 3950 | *array_size = xpath_result_size; |
| 3951 | if (!element_array) { |
| 3952 | ERR("Calloc config element array"); |
| 3953 | goto end; |
| 3954 | } |
| 3955 | |
| 3956 | for (int i = 0; i < xpath_result_size; i++) { |
| 3957 | xmlNodePtr node_copy = NULL; |
| 3958 | node_copy = xmlCopyNode(xpath_result_set->nodeTab[i], 1); |
| 3959 | if (!node_copy) { |
| 3960 | ERR("Xml copy of event node"); |
| 3961 | goto error; |
| 3962 | } |
| 3963 | /* Hand off ownership */ |
| 3964 | (*element_array)[i] = malloc(sizeof(struct config_element)); |
| 3965 | if (!((*element_array)[i])){ |
| 3966 | ERR("Malloc config_element array"); |
| 3967 | xmlFreeNode(node_copy); |
| 3968 | goto error; |
| 3969 | }; |
| 3970 | (*element_array)[i]->element = node_copy; |
| 3971 | } |
| 3972 | end: |
| 3973 | xmlXPathFreeContext(xpath_context); |
| 3974 | xmlXPathFreeObject(xpath_object); |
| 3975 | xmlFree(internal_xpath); |
| 3976 | xmlFree(internal_value); |
| 3977 | xmlFreeDoc(document); |
| 3978 | return; |
| 3979 | error: |
| 3980 | |
| 3981 | if (element_array) { |
| 3982 | config_element_free_array(*element_array, *array_size); |
| 3983 | } |
| 3984 | |
| 3985 | *array_size = 0; |
| 3986 | |
| 3987 | xmlXPathFreeContext(xpath_context); |
| 3988 | xmlXPathFreeObject(xpath_object); |
| 3989 | xmlFree(internal_xpath); |
| 3990 | xmlFree(internal_value); |
| 3991 | return; |
| 3992 | } |
| 3993 | /* Create an internal copy of the config_element. |
| 3994 | * The users is responsible for the freeing of the passed child. |
| 3995 | */ |
| 3996 | LTTNG_HIDDEN |
| 3997 | int config_element_add_or_replace_child(struct config_element *parent, struct config_element *child) |
| 3998 | { |
| 3999 | assert(parent); |
| 4000 | assert(child); |
| 4001 | assert(parent->element); |
| 4002 | assert(child->element); |
| 4003 | |
| 4004 | int ret = 0; |
| 4005 | xmlNodePtr local_copy; |
| 4006 | xmlNodePtr x_ret = NULL; |
| 4007 | xmlNodePtr iterator = NULL; |
| 4008 | |
| 4009 | xmlNodePtr x_parent = parent->element; |
| 4010 | xmlNodePtr x_child = child->element; |
| 4011 | |
| 4012 | /* Find and delete the node with the same name if present */ |
| 4013 | iterator = x_parent->children; |
| 4014 | while (iterator != NULL) { |
| 4015 | if ((!xmlStrcmp(iterator->name, x_child->name))){ |
| 4016 | xmlNodePtr del = iterator; |
| 4017 | iterator = iterator->next; |
| 4018 | xmlUnlinkNode(del); |
| 4019 | xmlFreeNode(del); |
| 4020 | } else { |
| 4021 | iterator = iterator->next; |
| 4022 | } |
| 4023 | } |
| 4024 | |
| 4025 | /* Add the child */ |
| 4026 | local_copy = xmlCopyNode(x_child, 1); |
| 4027 | if (!local_copy) { |
| 4028 | ERR("Duplication of node to be insert failed"); |
| 4029 | ret = -LTTNG_ERR_CONFIG_ADD_CHILD; |
| 4030 | goto end; |
| 4031 | } |
| 4032 | x_ret = xmlAddChild(x_parent, local_copy); |
| 4033 | if (!x_ret) { |
| 4034 | xmlFreeNode(local_copy); |
| 4035 | ret = -LTTNG_ERR_CONFIG_ADD_CHILD; |
| 4036 | } |
| 4037 | end: |
| 4038 | return ret; |
| 4039 | } |
| 4040 | |
| 4041 | LTTNG_HIDDEN |
| 4042 | char *config_element_get_element_value(const struct config_element *element, const char *xpath) |
| 4043 | { |
| 4044 | char *value = NULL; |
| 4045 | int xpath_result_size; |
| 4046 | int value_result_size; |
| 4047 | |
| 4048 | xmlXPathContextPtr xpath_context = NULL; |
| 4049 | xmlXPathObjectPtr xpath_object = NULL; |
| 4050 | xmlNodeSetPtr xpath_result_set = NULL; |
| 4051 | xmlChar *internal_xpath = NULL; |
| 4052 | xmlChar *internal_value = NULL; |
| 4053 | xmlDocPtr document = NULL; |
| 4054 | xmlNodePtr local_copy = NULL; |
| 4055 | xmlNodePtr place_holder = NULL; |
| 4056 | |
| 4057 | assert(element); |
| 4058 | assert(element->element); |
| 4059 | assert(xpath); |
| 4060 | |
| 4061 | /* Create a new doc and set root node as passed element */ |
| 4062 | document = xmlNewDoc(BAD_CAST "1.0"); |
| 4063 | if (!document) { |
| 4064 | value = NULL; |
| 4065 | ERR("Unable to create xml document"); |
| 4066 | goto end; |
| 4067 | } |
| 4068 | |
| 4069 | local_copy = xmlCopyNode(element->element, 1); |
| 4070 | if (!local_copy) { |
| 4071 | value = NULL; |
| 4072 | ERR("Unable to copy an xml node"); |
| 4073 | goto end; |
| 4074 | } |
| 4075 | |
| 4076 | /* Hand off the local_copy to the xmlDoc */ |
| 4077 | place_holder = xmlDocSetRootElement(document, local_copy); |
| 4078 | if (place_holder) { |
| 4079 | value = NULL; |
| 4080 | ERR("The document root was already set"); |
| 4081 | xmlFreeNode(local_copy); |
| 4082 | goto end; |
| 4083 | } |
| 4084 | |
| 4085 | internal_xpath = encode_string(xpath); |
| 4086 | if (!internal_xpath) { |
| 4087 | /*TODO set valid error */ |
| 4088 | value = NULL; |
| 4089 | ERR("Unable to encode xpath string"); |
| 4090 | goto end; |
| 4091 | } |
| 4092 | |
| 4093 | /* Initialize xpath context */ |
| 4094 | xpath_context = xmlXPathNewContext(document); |
| 4095 | if (!xpath_context) { |
| 4096 | /*TODO set valid error */ |
| 4097 | value = NULL; |
| 4098 | ERR("Unable to create xpath context"); |
| 4099 | goto end; |
| 4100 | } |
| 4101 | |
| 4102 | /* Evaluate the xpath expression */ |
| 4103 | xpath_object = xmlXPathEvalExpression(internal_xpath, xpath_context); |
| 4104 | if (!xpath_object) { |
| 4105 | /*TODO set valid error */ |
| 4106 | value = NULL; |
| 4107 | ERR("Unable to evaluate xpath query (invalid query format)"); |
| 4108 | goto end; |
| 4109 | } |
| 4110 | |
| 4111 | xpath_result_set = xpath_object->nodesetval; |
| 4112 | if (!xpath_result_set) { |
| 4113 | /*TODO set valid error */ |
| 4114 | value = NULL; |
| 4115 | goto end; |
| 4116 | } |
| 4117 | |
| 4118 | xpath_result_size = xpath_result_set->nodeNr; |
| 4119 | |
| 4120 | if (xpath_result_size > 1) { |
| 4121 | /*TODO set valid error */ |
| 4122 | ERR("To many result while fetching config element value"); |
| 4123 | value = NULL; |
| 4124 | goto end; |
| 4125 | } |
| 4126 | |
| 4127 | if (xpath_result_size == 0) { |
| 4128 | value = NULL; |
| 4129 | goto end; |
| 4130 | } |
| 4131 | |
| 4132 | assert(xpath_result_set->nodeTab[0]); |
| 4133 | internal_value = xmlNodeGetContent(xpath_result_set->nodeTab[0]); |
| 4134 | if (!internal_value) { |
| 4135 | value = NULL; |
| 4136 | goto end; |
| 4137 | } |
| 4138 | |
| 4139 | value_result_size = xmlStrlen(internal_value); |
| 4140 | value = calloc(value_result_size + 1, sizeof(char)); |
| 4141 | strncpy(value, (char *) internal_value, value_result_size); |
| 4142 | |
| 4143 | end: |
| 4144 | xmlXPathFreeContext(xpath_context); |
| 4145 | xmlXPathFreeObject(xpath_object); |
| 4146 | xmlFree(internal_xpath); |
| 4147 | xmlFree(internal_value); |
| 4148 | xmlFreeDoc(document); |
| 4149 | return value; |
| 4150 | |
| 4151 | } |
| 4152 | |
| 4153 | LTTNG_HIDDEN |
| 4154 | int config_process_event_element(const struct config_element *element, const char *session_name, int domain_type, const char *channel_name) { |
| 4155 | |
| 4156 | int ret = 0; |
| 4157 | xmlNodePtr node; |
| 4158 | struct lttng_domain domain; |
| 4159 | struct lttng_handle *handle; |
| 4160 | |
| 4161 | assert(element); |
| 4162 | assert(element->element); |
| 4163 | |
| 4164 | memset(&domain, 0, sizeof(struct lttng_domain)); |
| 4165 | |
| 4166 | /* Create handle */ |
| 4167 | domain.type = domain_type; |
| 4168 | switch (domain.type) { |
| 4169 | case LTTNG_DOMAIN_KERNEL: |
| 4170 | domain.buf_type = LTTNG_BUFFER_GLOBAL; |
| 4171 | break; |
| 4172 | case LTTNG_DOMAIN_UST: |
| 4173 | case LTTNG_DOMAIN_JUL: |
| 4174 | case LTTNG_DOMAIN_LOG4J: |
| 4175 | case LTTNG_DOMAIN_PYTHON: |
| 4176 | domain.buf_type = LTTNG_BUFFER_PER_UID; |
| 4177 | break; |
| 4178 | case LTTNG_DOMAIN_NONE: |
| 4179 | default: |
| 4180 | assert(0); |
| 4181 | } |
| 4182 | |
| 4183 | handle = lttng_create_handle(session_name, &domain); |
| 4184 | if (!handle) { |
| 4185 | ret = -LTTNG_ERR_HANDLE_CREATION; |
| 4186 | goto error; |
| 4187 | } |
| 4188 | |
| 4189 | |
| 4190 | node = element->element; |
| 4191 | /* Check if element is really and event */ |
| 4192 | if (xmlStrcmp(BAD_CAST config_element_event, node->name)) { |
| 4193 | ret = -LTTNG_ERR_CONFIG_INVALID_ELEMENT; |
| 4194 | goto error; |
| 4195 | } |
| 4196 | |
| 4197 | ret = process_event_node(node, handle, channel_name, ENABLE); |
| 4198 | if (ret) { |
| 4199 | goto error; |
| 4200 | } |
| 4201 | error: |
| 4202 | free(handle); |
| 4203 | return ret; |
| 4204 | } |