| 1 | /* |
| 2 | * Copyright (C) 2013 Jérémie Galarneau <jeremie.galarneau@efficios.com> |
| 3 | * |
| 4 | * SPDX-License-Identifier: LGPL-2.1-only |
| 5 | * |
| 6 | */ |
| 7 | |
| 8 | #include "lttng/tracker.h" |
| 9 | #define _LGPL_SOURCE |
| 10 | #include "config-internal.hpp" |
| 11 | #include "session-config.hpp" |
| 12 | |
| 13 | #include <common/compat/getenv.hpp> |
| 14 | #include <common/defaults.hpp> |
| 15 | #include <common/dynamic-buffer.hpp> |
| 16 | #include <common/error.hpp> |
| 17 | #include <common/macros.hpp> |
| 18 | #include <common/utils.hpp> |
| 19 | |
| 20 | #include <lttng/lttng-error.h> |
| 21 | #include <lttng/lttng.h> |
| 22 | #include <lttng/rotation.h> |
| 23 | #include <lttng/snapshot.h> |
| 24 | #include <lttng/userspace-probe.h> |
| 25 | |
| 26 | #include <ctype.h> |
| 27 | #include <dirent.h> |
| 28 | #include <inttypes.h> |
| 29 | #include <libxml/parser.h> |
| 30 | #include <libxml/tree.h> |
| 31 | #include <libxml/valid.h> |
| 32 | #include <libxml/xmlschemas.h> |
| 33 | #include <stdbool.h> |
| 34 | #include <stdio.h> |
| 35 | #include <stdlib.h> |
| 36 | #include <string.h> |
| 37 | #include <sys/stat.h> |
| 38 | #include <sys/types.h> |
| 39 | #include <unistd.h> |
| 40 | |
| 41 | #define CONFIG_USERSPACE_PROBE_LOOKUP_METHOD_NAME_MAX_LEN 7 |
| 42 | |
| 43 | namespace { |
| 44 | struct session_config_validation_ctx { |
| 45 | xmlSchemaParserCtxtPtr parser_ctx; |
| 46 | xmlSchemaPtr schema; |
| 47 | xmlSchemaValidCtxtPtr schema_validation_ctx; |
| 48 | }; |
| 49 | } /* namespace */ |
| 50 | |
| 51 | const char *const config_element_all = "all"; |
| 52 | LTTNG_EXPORT const char *config_xml_encoding = "UTF-8"; |
| 53 | LTTNG_EXPORT size_t config_xml_encoding_bytes_per_char = 2; /* Size of the encoding's largest |
| 54 | character */ |
| 55 | LTTNG_EXPORT const char *config_xml_indent_string = "\t"; |
| 56 | LTTNG_EXPORT const char *config_xml_true = "true"; |
| 57 | LTTNG_EXPORT const char *config_xml_false = "false"; |
| 58 | |
| 59 | const char *const config_element_channel = "channel"; |
| 60 | const char *const config_element_channels = "channels"; |
| 61 | const char *const config_element_domain = "domain"; |
| 62 | const char *const config_element_domains = "domains"; |
| 63 | const char *const config_element_event = "event"; |
| 64 | const char *const config_element_events = "events"; |
| 65 | const char *const config_element_context = "context"; |
| 66 | const char *const config_element_contexts = "contexts"; |
| 67 | const char *const config_element_attributes = "attributes"; |
| 68 | const char *const config_element_exclusion = "exclusion"; |
| 69 | const char *const config_element_exclusions = "exclusions"; |
| 70 | const char *const config_element_function_attributes = "function_attributes"; |
| 71 | const char *const config_element_probe_attributes = "probe_attributes"; |
| 72 | const char *const config_element_symbol_name = "symbol_name"; |
| 73 | const char *const config_element_address = "address"; |
| 74 | const char *const config_element_offset = "offset"; |
| 75 | |
| 76 | const char *const config_element_userspace_probe_lookup = "lookup_method"; |
| 77 | const char *const config_element_userspace_probe_lookup_function_default = "DEFAULT"; |
| 78 | const char *const config_element_userspace_probe_lookup_function_elf = "ELF"; |
| 79 | const char *const config_element_userspace_probe_lookup_tracepoint_sdt = "SDT"; |
| 80 | const char *const config_element_userspace_probe_location_binary_path = "binary_path"; |
| 81 | const char *const config_element_userspace_probe_function_attributes = |
| 82 | "userspace_probe_function_attributes"; |
| 83 | const char *const config_element_userspace_probe_function_location_function_name = "function_name"; |
| 84 | const char *const config_element_userspace_probe_tracepoint_attributes = |
| 85 | "userspace_probe_tracepoint_attributes"; |
| 86 | const char *const config_element_userspace_probe_tracepoint_location_provider_name = |
| 87 | "provider_name"; |
| 88 | const char *const config_element_userspace_probe_tracepoint_location_probe_name = "probe_name"; |
| 89 | |
| 90 | const char *const config_element_name = "name"; |
| 91 | const char *const config_element_enabled = "enabled"; |
| 92 | const char *const config_element_overwrite_mode = "overwrite_mode"; |
| 93 | const char *const config_element_subbuf_size = "subbuffer_size"; |
| 94 | const char *const config_element_num_subbuf = "subbuffer_count"; |
| 95 | const char *const config_element_switch_timer_interval = "switch_timer_interval"; |
| 96 | const char *const config_element_read_timer_interval = "read_timer_interval"; |
| 97 | const char *const config_element_monitor_timer_interval = "monitor_timer_interval"; |
| 98 | const char *const config_element_blocking_timeout = "blocking_timeout"; |
| 99 | const char *const config_element_output = "output"; |
| 100 | const char *const config_element_output_type = "output_type"; |
| 101 | const char *const config_element_tracefile_size = "tracefile_size"; |
| 102 | const char *const config_element_tracefile_count = "tracefile_count"; |
| 103 | const char *const config_element_live_timer_interval = "live_timer_interval"; |
| 104 | const char *const config_element_discarded_events = "discarded_events"; |
| 105 | const char *const config_element_lost_packets = "lost_packets"; |
| 106 | const char *const config_element_type = "type"; |
| 107 | const char *const config_element_buffer_type = "buffer_type"; |
| 108 | const char *const config_element_session = "session"; |
| 109 | const char *const config_element_sessions = "sessions"; |
| 110 | const char *const config_element_context_perf = "perf"; |
| 111 | const char *const config_element_context_app = "app"; |
| 112 | const char *const config_element_context_app_provider_name = "provider_name"; |
| 113 | const char *const config_element_context_app_ctx_name = "ctx_name"; |
| 114 | const char *const config_element_config = "config"; |
| 115 | const char *const config_element_started = "started"; |
| 116 | const char *const config_element_snapshot_mode = "snapshot_mode"; |
| 117 | const char *const config_element_loglevel = "loglevel"; |
| 118 | const char *const config_element_loglevel_type = "loglevel_type"; |
| 119 | const char *const config_element_filter = "filter"; |
| 120 | const char *const config_element_filter_expression = "filter_expression"; |
| 121 | const char *const config_element_snapshot_outputs = "snapshot_outputs"; |
| 122 | const char *const config_element_consumer_output = "consumer_output"; |
| 123 | const char *const config_element_destination = "destination"; |
| 124 | const char *const config_element_path = "path"; |
| 125 | const char *const config_element_net_output = "net_output"; |
| 126 | const char *const config_element_control_uri = "control_uri"; |
| 127 | const char *const config_element_data_uri = "data_uri"; |
| 128 | const char *const config_element_max_size = "max_size"; |
| 129 | const char *const config_element_pid = "pid"; |
| 130 | const char *const config_element_pids = "pids"; |
| 131 | const char *const config_element_shared_memory_path = "shared_memory_path"; |
| 132 | |
| 133 | const char *const config_element_process_attr_id = "id"; |
| 134 | const char *const config_element_process_attr_tracker_pid = "pid_process_attr_tracker"; |
| 135 | const char *const config_element_process_attr_tracker_vpid = "vpid_process_attr_tracker"; |
| 136 | const char *const config_element_process_attr_tracker_uid = "uid_process_attr_tracker"; |
| 137 | const char *const config_element_process_attr_tracker_vuid = "vuid_process_attr_tracker"; |
| 138 | const char *const config_element_process_attr_tracker_gid = "gid_process_attr_tracker"; |
| 139 | const char *const config_element_process_attr_tracker_vgid = "vgid_process_attr_tracker"; |
| 140 | const char *const config_element_process_attr_trackers = "process_attr_trackers"; |
| 141 | const char *const config_element_process_attr_values = "process_attr_values"; |
| 142 | const char *const config_element_process_attr_value_type = "process_attr_value_type"; |
| 143 | const char *const config_element_process_attr_pid_value = "pid"; |
| 144 | const char *const config_element_process_attr_vpid_value = "vpid"; |
| 145 | const char *const config_element_process_attr_uid_value = "uid"; |
| 146 | const char *const config_element_process_attr_vuid_value = "vuid"; |
| 147 | const char *const config_element_process_attr_gid_value = "gid"; |
| 148 | const char *const config_element_process_attr_vgid_value = "vgid"; |
| 149 | const char *const config_element_process_attr_tracker_type = "process_attr_tracker_type"; |
| 150 | |
| 151 | /* Used for support of legacy tracker serialization (< 2.12). */ |
| 152 | const char *const config_element_trackers_legacy = "trackers"; |
| 153 | const char *const config_element_pid_tracker_legacy = "pid_tracker"; |
| 154 | const char *const config_element_tracker_targets_legacy = "targets"; |
| 155 | const char *const config_element_tracker_pid_legacy = "pid"; |
| 156 | |
| 157 | const char *const config_element_rotation_schedules = "rotation_schedules"; |
| 158 | const char *const config_element_rotation_schedule_periodic = "periodic"; |
| 159 | const char *const config_element_rotation_schedule_periodic_time_us = "time_us"; |
| 160 | const char *const config_element_rotation_schedule_size_threshold = "size_threshold"; |
| 161 | const char *const config_element_rotation_schedule_size_threshold_bytes = "bytes"; |
| 162 | |
| 163 | const char *const config_domain_type_kernel = "KERNEL"; |
| 164 | const char *const config_domain_type_ust = "UST"; |
| 165 | const char *const config_domain_type_jul = "JUL"; |
| 166 | const char *const config_domain_type_log4j = "LOG4J"; |
| 167 | const char *const config_domain_type_python = "PYTHON"; |
| 168 | |
| 169 | const char *const config_buffer_type_per_pid = "PER_PID"; |
| 170 | const char *const config_buffer_type_per_uid = "PER_UID"; |
| 171 | const char *const config_buffer_type_global = "GLOBAL"; |
| 172 | |
| 173 | const char *const config_overwrite_mode_discard = "DISCARD"; |
| 174 | const char *const config_overwrite_mode_overwrite = "OVERWRITE"; |
| 175 | |
| 176 | const char *const config_output_type_splice = "SPLICE"; |
| 177 | const char *const config_output_type_mmap = "MMAP"; |
| 178 | |
| 179 | const char *const config_loglevel_type_all = "ALL"; |
| 180 | const char *const config_loglevel_type_range = "RANGE"; |
| 181 | const char *const config_loglevel_type_single = "SINGLE"; |
| 182 | |
| 183 | const char *const config_event_type_all = "ALL"; |
| 184 | const char *const config_event_type_tracepoint = "TRACEPOINT"; |
| 185 | const char *const config_event_type_probe = "PROBE"; |
| 186 | const char *const config_event_type_userspace_probe = "USERSPACE_PROBE"; |
| 187 | const char *const config_event_type_function = "FUNCTION"; |
| 188 | const char *const config_event_type_function_entry = "FUNCTION_ENTRY"; |
| 189 | const char *const config_event_type_noop = "NOOP"; |
| 190 | const char *const config_event_type_syscall = "SYSCALL"; |
| 191 | const char *const config_event_type_kprobe = "KPROBE"; |
| 192 | const char *const config_event_type_kretprobe = "KRETPROBE"; |
| 193 | |
| 194 | const char *const config_event_context_pid = "PID"; |
| 195 | const char *const config_event_context_procname = "PROCNAME"; |
| 196 | const char *const config_event_context_prio = "PRIO"; |
| 197 | const char *const config_event_context_nice = "NICE"; |
| 198 | const char *const config_event_context_vpid = "VPID"; |
| 199 | const char *const config_event_context_tid = "TID"; |
| 200 | const char *const config_event_context_vtid = "VTID"; |
| 201 | const char *const config_event_context_ppid = "PPID"; |
| 202 | const char *const config_event_context_vppid = "VPPID"; |
| 203 | const char *const config_event_context_pthread_id = "PTHREAD_ID"; |
| 204 | const char *const config_event_context_hostname = "HOSTNAME"; |
| 205 | const char *const config_event_context_ip = "IP"; |
| 206 | const char *const config_event_context_perf_thread_counter = "PERF_THREAD_COUNTER"; |
| 207 | const char *const config_event_context_app = "APP"; |
| 208 | const char *const config_event_context_interruptible = "INTERRUPTIBLE"; |
| 209 | const char *const config_event_context_preemptible = "PREEMPTIBLE"; |
| 210 | const char *const config_event_context_need_reschedule = "NEED_RESCHEDULE"; |
| 211 | const char *const config_event_context_migratable = "MIGRATABLE"; |
| 212 | const char *const config_event_context_callstack_user = "CALLSTACK_USER"; |
| 213 | const char *const config_event_context_callstack_kernel = "CALLSTACK_KERNEL"; |
| 214 | const char *const config_event_context_cgroup_ns = "CGROUP_NS"; |
| 215 | const char *const config_event_context_ipc_ns = "IPC_NS"; |
| 216 | const char *const config_event_context_mnt_ns = "MNT_NS"; |
| 217 | const char *const config_event_context_net_ns = "NET_NS"; |
| 218 | const char *const config_event_context_pid_ns = "PID_NS"; |
| 219 | const char *const config_event_context_time_ns = "TIME_NS"; |
| 220 | const char *const config_event_context_user_ns = "USER_NS"; |
| 221 | const char *const config_event_context_uts_ns = "UTS_NS"; |
| 222 | const char *const config_event_context_uid = "UID"; |
| 223 | const char *const config_event_context_euid = "EUID"; |
| 224 | const char *const config_event_context_suid = "SUID"; |
| 225 | const char *const config_event_context_gid = "GID"; |
| 226 | const char *const config_event_context_egid = "EGID"; |
| 227 | const char *const config_event_context_sgid = "SGID"; |
| 228 | const char *const config_event_context_vuid = "VUID"; |
| 229 | const char *const config_event_context_veuid = "VEUID"; |
| 230 | const char *const config_event_context_vsuid = "VSUID"; |
| 231 | const char *const config_event_context_vgid = "VGID"; |
| 232 | const char *const config_event_context_vegid = "VEGID"; |
| 233 | const char *const config_event_context_vsgid = "VSGID"; |
| 234 | |
| 235 | /* Deprecated symbols */ |
| 236 | LTTNG_EXPORT const char *config_element_perf; |
| 237 | |
| 238 | enum process_event_node_phase { |
| 239 | CREATION = 0, |
| 240 | ENABLE = 1, |
| 241 | }; |
| 242 | |
| 243 | namespace { |
| 244 | struct consumer_output { |
| 245 | int enabled; |
| 246 | char *path; |
| 247 | char *control_uri; |
| 248 | char *data_uri; |
| 249 | }; |
| 250 | } /* namespace */ |
| 251 | |
| 252 | /* |
| 253 | * Returns a xmlChar string which must be released using xmlFree(). |
| 254 | */ |
| 255 | static xmlChar *encode_string(const char *in_str) |
| 256 | { |
| 257 | xmlChar *out_str = nullptr; |
| 258 | xmlCharEncodingHandlerPtr handler; |
| 259 | int out_len, ret, in_len; |
| 260 | |
| 261 | LTTNG_ASSERT(in_str); |
| 262 | |
| 263 | handler = xmlFindCharEncodingHandler(config_xml_encoding); |
| 264 | if (!handler) { |
| 265 | ERR("xmlFindCharEncodingHandler return NULL!. Configure issue!"); |
| 266 | goto end; |
| 267 | } |
| 268 | |
| 269 | in_len = strlen(in_str); |
| 270 | /* |
| 271 | * Add 1 byte for the NULL terminted character. The factor 4 here is |
| 272 | * used because UTF-8 characters can take up to 4 bytes. |
| 273 | */ |
| 274 | out_len = (in_len * 4) + 1; |
| 275 | out_str = (xmlChar *) xmlMalloc(out_len); |
| 276 | if (!out_str) { |
| 277 | goto end; |
| 278 | } |
| 279 | |
| 280 | ret = handler->input(out_str, &out_len, (const xmlChar *) in_str, &in_len); |
| 281 | if (ret < 0) { |
| 282 | xmlFree(out_str); |
| 283 | out_str = nullptr; |
| 284 | goto end; |
| 285 | } |
| 286 | |
| 287 | /* out_len is now the size of out_str */ |
| 288 | out_str[out_len] = '\0'; |
| 289 | end: |
| 290 | return out_str; |
| 291 | } |
| 292 | |
| 293 | struct config_writer *config_writer_create(int fd_output, int indent) |
| 294 | { |
| 295 | int ret; |
| 296 | struct config_writer *writer; |
| 297 | xmlOutputBufferPtr buffer; |
| 298 | |
| 299 | writer = zmalloc<config_writer>(); |
| 300 | if (!writer) { |
| 301 | PERROR("zmalloc config_writer_create"); |
| 302 | goto end; |
| 303 | } |
| 304 | |
| 305 | buffer = xmlOutputBufferCreateFd(fd_output, nullptr); |
| 306 | if (!buffer) { |
| 307 | goto error_destroy; |
| 308 | } |
| 309 | |
| 310 | writer->writer = xmlNewTextWriter(buffer); |
| 311 | ret = xmlTextWriterStartDocument(writer->writer, nullptr, config_xml_encoding, nullptr); |
| 312 | if (ret < 0) { |
| 313 | goto error_destroy; |
| 314 | } |
| 315 | |
| 316 | ret = xmlTextWriterSetIndentString(writer->writer, BAD_CAST config_xml_indent_string); |
| 317 | if (ret) { |
| 318 | goto error_destroy; |
| 319 | } |
| 320 | |
| 321 | ret = xmlTextWriterSetIndent(writer->writer, indent); |
| 322 | if (ret) { |
| 323 | goto error_destroy; |
| 324 | } |
| 325 | |
| 326 | end: |
| 327 | return writer; |
| 328 | error_destroy: |
| 329 | config_writer_destroy(writer); |
| 330 | return nullptr; |
| 331 | } |
| 332 | |
| 333 | int config_writer_destroy(struct config_writer *writer) |
| 334 | { |
| 335 | int ret = 0; |
| 336 | |
| 337 | if (!writer) { |
| 338 | ret = -EINVAL; |
| 339 | goto end; |
| 340 | } |
| 341 | |
| 342 | if (xmlTextWriterEndDocument(writer->writer) < 0) { |
| 343 | WARN("Could not close XML document"); |
| 344 | ret = -EIO; |
| 345 | } |
| 346 | |
| 347 | if (writer->writer) { |
| 348 | xmlFreeTextWriter(writer->writer); |
| 349 | } |
| 350 | |
| 351 | free(writer); |
| 352 | end: |
| 353 | return ret; |
| 354 | } |
| 355 | |
| 356 | int config_writer_open_element(struct config_writer *writer, const char *element_name) |
| 357 | { |
| 358 | int ret; |
| 359 | xmlChar *encoded_element_name; |
| 360 | |
| 361 | if (!writer || !writer->writer || !element_name || !element_name[0]) { |
| 362 | ret = -1; |
| 363 | goto end; |
| 364 | } |
| 365 | |
| 366 | encoded_element_name = encode_string(element_name); |
| 367 | if (!encoded_element_name) { |
| 368 | ret = -1; |
| 369 | goto end; |
| 370 | } |
| 371 | |
| 372 | ret = xmlTextWriterStartElement(writer->writer, encoded_element_name); |
| 373 | xmlFree(encoded_element_name); |
| 374 | end: |
| 375 | return ret >= 0 ? 0 : ret; |
| 376 | } |
| 377 | |
| 378 | int config_writer_write_attribute(struct config_writer *writer, const char *name, const char *value) |
| 379 | { |
| 380 | int ret; |
| 381 | xmlChar *encoded_name = nullptr; |
| 382 | xmlChar *encoded_value = nullptr; |
| 383 | |
| 384 | if (!writer || !writer->writer || !name || !name[0]) { |
| 385 | ret = -1; |
| 386 | goto end; |
| 387 | } |
| 388 | |
| 389 | encoded_name = encode_string(name); |
| 390 | if (!encoded_name) { |
| 391 | ret = -1; |
| 392 | goto end; |
| 393 | } |
| 394 | |
| 395 | encoded_value = encode_string(value); |
| 396 | if (!encoded_value) { |
| 397 | ret = -1; |
| 398 | goto end; |
| 399 | } |
| 400 | |
| 401 | ret = xmlTextWriterWriteAttribute(writer->writer, encoded_name, encoded_value); |
| 402 | end: |
| 403 | xmlFree(encoded_name); |
| 404 | xmlFree(encoded_value); |
| 405 | return ret >= 0 ? 0 : ret; |
| 406 | } |
| 407 | |
| 408 | int config_writer_close_element(struct config_writer *writer) |
| 409 | { |
| 410 | int ret; |
| 411 | |
| 412 | if (!writer || !writer->writer) { |
| 413 | ret = -1; |
| 414 | goto end; |
| 415 | } |
| 416 | |
| 417 | ret = xmlTextWriterEndElement(writer->writer); |
| 418 | end: |
| 419 | return ret >= 0 ? 0 : ret; |
| 420 | } |
| 421 | |
| 422 | int config_writer_write_element_unsigned_int(struct config_writer *writer, |
| 423 | const char *element_name, |
| 424 | uint64_t value) |
| 425 | { |
| 426 | int ret; |
| 427 | xmlChar *encoded_element_name; |
| 428 | |
| 429 | if (!writer || !writer->writer || !element_name || !element_name[0]) { |
| 430 | ret = -1; |
| 431 | goto end; |
| 432 | } |
| 433 | |
| 434 | encoded_element_name = encode_string(element_name); |
| 435 | if (!encoded_element_name) { |
| 436 | ret = -1; |
| 437 | goto end; |
| 438 | } |
| 439 | |
| 440 | ret = xmlTextWriterWriteFormatElement( |
| 441 | writer->writer, encoded_element_name, "%" PRIu64, value); |
| 442 | xmlFree(encoded_element_name); |
| 443 | end: |
| 444 | return ret >= 0 ? 0 : ret; |
| 445 | } |
| 446 | |
| 447 | int config_writer_write_element_signed_int(struct config_writer *writer, |
| 448 | const char *element_name, |
| 449 | int64_t value) |
| 450 | { |
| 451 | int ret; |
| 452 | xmlChar *encoded_element_name; |
| 453 | |
| 454 | if (!writer || !writer->writer || !element_name || !element_name[0]) { |
| 455 | ret = -1; |
| 456 | goto end; |
| 457 | } |
| 458 | |
| 459 | encoded_element_name = encode_string(element_name); |
| 460 | if (!encoded_element_name) { |
| 461 | ret = -1; |
| 462 | goto end; |
| 463 | } |
| 464 | |
| 465 | ret = xmlTextWriterWriteFormatElement( |
| 466 | writer->writer, encoded_element_name, "%" PRIi64, value); |
| 467 | xmlFree(encoded_element_name); |
| 468 | end: |
| 469 | return ret >= 0 ? 0 : ret; |
| 470 | } |
| 471 | |
| 472 | int config_writer_write_element_bool(struct config_writer *writer, |
| 473 | const char *element_name, |
| 474 | int value) |
| 475 | { |
| 476 | return config_writer_write_element_string( |
| 477 | writer, element_name, value ? config_xml_true : config_xml_false); |
| 478 | } |
| 479 | |
| 480 | int config_writer_write_element_double(struct config_writer *writer, |
| 481 | const char *element_name, |
| 482 | double value) |
| 483 | { |
| 484 | int ret; |
| 485 | xmlChar *encoded_element_name; |
| 486 | |
| 487 | if (!writer || !writer->writer || !element_name || !element_name[0]) { |
| 488 | ret = -1; |
| 489 | goto end; |
| 490 | } |
| 491 | |
| 492 | encoded_element_name = encode_string(element_name); |
| 493 | if (!encoded_element_name) { |
| 494 | ret = -1; |
| 495 | goto end; |
| 496 | } |
| 497 | |
| 498 | ret = xmlTextWriterWriteFormatElement(writer->writer, encoded_element_name, "%f", value); |
| 499 | xmlFree(encoded_element_name); |
| 500 | end: |
| 501 | return ret >= 0 ? 0 : ret; |
| 502 | } |
| 503 | |
| 504 | int config_writer_write_element_string(struct config_writer *writer, |
| 505 | const char *element_name, |
| 506 | const char *value) |
| 507 | { |
| 508 | int ret; |
| 509 | xmlChar *encoded_element_name = nullptr; |
| 510 | xmlChar *encoded_value = nullptr; |
| 511 | |
| 512 | if (!writer || !writer->writer || !element_name || !element_name[0] || !value) { |
| 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 | encoded_value = encode_string(value); |
| 524 | if (!encoded_value) { |
| 525 | ret = -1; |
| 526 | goto end; |
| 527 | } |
| 528 | |
| 529 | ret = xmlTextWriterWriteElement(writer->writer, encoded_element_name, encoded_value); |
| 530 | end: |
| 531 | xmlFree(encoded_element_name); |
| 532 | xmlFree(encoded_value); |
| 533 | return ret >= 0 ? 0 : ret; |
| 534 | } |
| 535 | |
| 536 | static ATTR_FORMAT_PRINTF(2, 3) void xml_error_handler(void *ctx __attribute__((unused)), |
| 537 | const char *format, |
| 538 | ...) |
| 539 | { |
| 540 | char *errMsg; |
| 541 | va_list args; |
| 542 | int ret; |
| 543 | |
| 544 | va_start(args, format); |
| 545 | ret = vasprintf(&errMsg, format, args); |
| 546 | va_end(args); |
| 547 | if (ret == -1) { |
| 548 | ERR("String allocation failed in xml error handler"); |
| 549 | return; |
| 550 | } |
| 551 | |
| 552 | fprintf(stderr, "XML Error: %s", errMsg); |
| 553 | free(errMsg); |
| 554 | } |
| 555 | |
| 556 | static void fini_session_config_validation_ctx(struct session_config_validation_ctx *ctx) |
| 557 | { |
| 558 | if (ctx->parser_ctx) { |
| 559 | xmlSchemaFreeParserCtxt(ctx->parser_ctx); |
| 560 | } |
| 561 | |
| 562 | if (ctx->schema) { |
| 563 | xmlSchemaFree(ctx->schema); |
| 564 | } |
| 565 | |
| 566 | if (ctx->schema_validation_ctx) { |
| 567 | xmlSchemaFreeValidCtxt(ctx->schema_validation_ctx); |
| 568 | } |
| 569 | |
| 570 | memset(ctx, 0, sizeof(struct session_config_validation_ctx)); |
| 571 | } |
| 572 | |
| 573 | static char *get_session_config_xsd_path() |
| 574 | { |
| 575 | char *xsd_path; |
| 576 | const char *base_path = lttng_secure_getenv(DEFAULT_SESSION_CONFIG_XSD_PATH_ENV); |
| 577 | size_t base_path_len; |
| 578 | size_t max_path_len; |
| 579 | |
| 580 | if (!base_path) { |
| 581 | base_path = DEFAULT_SESSION_CONFIG_XSD_PATH; |
| 582 | } |
| 583 | |
| 584 | base_path_len = strlen(base_path); |
| 585 | max_path_len = base_path_len + sizeof(DEFAULT_SESSION_CONFIG_XSD_FILENAME) + 1; |
| 586 | xsd_path = zmalloc<char>(max_path_len); |
| 587 | if (!xsd_path) { |
| 588 | goto end; |
| 589 | } |
| 590 | |
| 591 | strcpy(xsd_path, base_path); |
| 592 | if (xsd_path[base_path_len - 1] != '/') { |
| 593 | xsd_path[base_path_len++] = '/'; |
| 594 | } |
| 595 | |
| 596 | strcpy(xsd_path + base_path_len, DEFAULT_SESSION_CONFIG_XSD_FILENAME); |
| 597 | end: |
| 598 | return xsd_path; |
| 599 | } |
| 600 | |
| 601 | static int init_session_config_validation_ctx(struct session_config_validation_ctx *ctx) |
| 602 | { |
| 603 | int ret; |
| 604 | char *xsd_path = get_session_config_xsd_path(); |
| 605 | |
| 606 | if (!xsd_path) { |
| 607 | ret = -LTTNG_ERR_NOMEM; |
| 608 | goto end; |
| 609 | } |
| 610 | |
| 611 | ctx->parser_ctx = xmlSchemaNewParserCtxt(xsd_path); |
| 612 | if (!ctx->parser_ctx) { |
| 613 | ERR("XSD parser context creation failed"); |
| 614 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; |
| 615 | goto end; |
| 616 | } |
| 617 | xmlSchemaSetParserErrors(ctx->parser_ctx, xml_error_handler, xml_error_handler, nullptr); |
| 618 | |
| 619 | ctx->schema = xmlSchemaParse(ctx->parser_ctx); |
| 620 | if (!ctx->schema) { |
| 621 | ERR("XSD parsing failed"); |
| 622 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; |
| 623 | goto end; |
| 624 | } |
| 625 | |
| 626 | ctx->schema_validation_ctx = xmlSchemaNewValidCtxt(ctx->schema); |
| 627 | if (!ctx->schema_validation_ctx) { |
| 628 | ERR("XSD validation context creation failed"); |
| 629 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; |
| 630 | goto end; |
| 631 | } |
| 632 | |
| 633 | xmlSchemaSetValidErrors( |
| 634 | ctx->schema_validation_ctx, xml_error_handler, xml_error_handler, nullptr); |
| 635 | ret = 0; |
| 636 | |
| 637 | end: |
| 638 | if (ret) { |
| 639 | fini_session_config_validation_ctx(ctx); |
| 640 | } |
| 641 | |
| 642 | free(xsd_path); |
| 643 | return ret; |
| 644 | } |
| 645 | |
| 646 | static int parse_uint(xmlChar *str, uint64_t *val) |
| 647 | { |
| 648 | int ret; |
| 649 | char *endptr; |
| 650 | |
| 651 | if (!str || !val) { |
| 652 | ret = -1; |
| 653 | goto end; |
| 654 | } |
| 655 | |
| 656 | *val = strtoull((const char *) str, &endptr, 10); |
| 657 | if (!endptr || *endptr) { |
| 658 | ret = -1; |
| 659 | } else { |
| 660 | ret = 0; |
| 661 | } |
| 662 | |
| 663 | end: |
| 664 | return ret; |
| 665 | } |
| 666 | |
| 667 | static int parse_int(xmlChar *str, int64_t *val) |
| 668 | { |
| 669 | int ret; |
| 670 | char *endptr; |
| 671 | |
| 672 | if (!str || !val) { |
| 673 | ret = -1; |
| 674 | goto end; |
| 675 | } |
| 676 | |
| 677 | *val = strtoll((const char *) str, &endptr, 10); |
| 678 | if (!endptr || *endptr) { |
| 679 | ret = -1; |
| 680 | } else { |
| 681 | ret = 0; |
| 682 | } |
| 683 | |
| 684 | end: |
| 685 | return ret; |
| 686 | } |
| 687 | |
| 688 | static int parse_bool(xmlChar *str, int *val) |
| 689 | { |
| 690 | int ret = 0; |
| 691 | |
| 692 | if (!str || !val) { |
| 693 | ret = -1; |
| 694 | goto end; |
| 695 | } |
| 696 | |
| 697 | if (!strcmp((const char *) str, config_xml_true) || !strcmp((const char *) str, "1")) { |
| 698 | *val = 1; |
| 699 | } else if (!strcmp((const char *) str, config_xml_false) || |
| 700 | !strcmp((const char *) str, "0")) { |
| 701 | *val = 0; |
| 702 | } else { |
| 703 | WARN("Invalid boolean value encountered (%s).", (const char *) str); |
| 704 | ret = -1; |
| 705 | } |
| 706 | end: |
| 707 | return ret; |
| 708 | } |
| 709 | |
| 710 | static int get_domain_type(xmlChar *domain) |
| 711 | { |
| 712 | int ret; |
| 713 | |
| 714 | if (!domain) { |
| 715 | goto error; |
| 716 | } |
| 717 | |
| 718 | if (!strcmp((char *) domain, config_domain_type_kernel)) { |
| 719 | ret = LTTNG_DOMAIN_KERNEL; |
| 720 | } else if (!strcmp((char *) domain, config_domain_type_ust)) { |
| 721 | ret = LTTNG_DOMAIN_UST; |
| 722 | } else if (!strcmp((char *) domain, config_domain_type_jul)) { |
| 723 | ret = LTTNG_DOMAIN_JUL; |
| 724 | } else if (!strcmp((char *) domain, config_domain_type_log4j)) { |
| 725 | ret = LTTNG_DOMAIN_LOG4J; |
| 726 | } else if (!strcmp((char *) domain, config_domain_type_python)) { |
| 727 | ret = LTTNG_DOMAIN_PYTHON; |
| 728 | } else { |
| 729 | goto error; |
| 730 | } |
| 731 | |
| 732 | return ret; |
| 733 | error: |
| 734 | return -1; |
| 735 | } |
| 736 | |
| 737 | static int get_buffer_type(xmlChar *buffer_type) |
| 738 | { |
| 739 | int ret; |
| 740 | |
| 741 | if (!buffer_type) { |
| 742 | goto error; |
| 743 | } |
| 744 | |
| 745 | if (!strcmp((char *) buffer_type, config_buffer_type_global)) { |
| 746 | ret = LTTNG_BUFFER_GLOBAL; |
| 747 | } else if (!strcmp((char *) buffer_type, config_buffer_type_per_uid)) { |
| 748 | ret = LTTNG_BUFFER_PER_UID; |
| 749 | } else if (!strcmp((char *) buffer_type, config_buffer_type_per_pid)) { |
| 750 | ret = LTTNG_BUFFER_PER_PID; |
| 751 | } else { |
| 752 | goto error; |
| 753 | } |
| 754 | |
| 755 | return ret; |
| 756 | error: |
| 757 | return -1; |
| 758 | } |
| 759 | |
| 760 | static int get_overwrite_mode(xmlChar *overwrite_mode) |
| 761 | { |
| 762 | int ret; |
| 763 | |
| 764 | if (!overwrite_mode) { |
| 765 | goto error; |
| 766 | } |
| 767 | |
| 768 | if (!strcmp((char *) overwrite_mode, config_overwrite_mode_overwrite)) { |
| 769 | ret = 1; |
| 770 | } else if (!strcmp((char *) overwrite_mode, config_overwrite_mode_discard)) { |
| 771 | ret = 0; |
| 772 | } else { |
| 773 | goto error; |
| 774 | } |
| 775 | |
| 776 | return ret; |
| 777 | error: |
| 778 | return -1; |
| 779 | } |
| 780 | |
| 781 | static int get_output_type(xmlChar *output_type) |
| 782 | { |
| 783 | int ret; |
| 784 | |
| 785 | if (!output_type) { |
| 786 | goto error; |
| 787 | } |
| 788 | |
| 789 | if (!strcmp((char *) output_type, config_output_type_mmap)) { |
| 790 | ret = LTTNG_EVENT_MMAP; |
| 791 | } else if (!strcmp((char *) output_type, config_output_type_splice)) { |
| 792 | ret = LTTNG_EVENT_SPLICE; |
| 793 | } else { |
| 794 | goto error; |
| 795 | } |
| 796 | |
| 797 | return ret; |
| 798 | error: |
| 799 | return -1; |
| 800 | } |
| 801 | |
| 802 | static int get_event_type(xmlChar *event_type) |
| 803 | { |
| 804 | int ret; |
| 805 | |
| 806 | if (!event_type) { |
| 807 | goto error; |
| 808 | } |
| 809 | |
| 810 | if (!strcmp((char *) event_type, config_event_type_all)) { |
| 811 | ret = LTTNG_EVENT_ALL; |
| 812 | } else if (!strcmp((char *) event_type, config_event_type_tracepoint)) { |
| 813 | ret = LTTNG_EVENT_TRACEPOINT; |
| 814 | } else if (!strcmp((char *) event_type, config_event_type_probe)) { |
| 815 | ret = LTTNG_EVENT_PROBE; |
| 816 | } else if (!strcmp((char *) event_type, config_event_type_userspace_probe)) { |
| 817 | ret = LTTNG_EVENT_USERSPACE_PROBE; |
| 818 | } else if (!strcmp((char *) event_type, config_event_type_function)) { |
| 819 | ret = LTTNG_EVENT_FUNCTION; |
| 820 | } else if (!strcmp((char *) event_type, config_event_type_function_entry)) { |
| 821 | ret = LTTNG_EVENT_FUNCTION_ENTRY; |
| 822 | } else if (!strcmp((char *) event_type, config_event_type_noop)) { |
| 823 | ret = LTTNG_EVENT_NOOP; |
| 824 | } else if (!strcmp((char *) event_type, config_event_type_syscall)) { |
| 825 | ret = LTTNG_EVENT_SYSCALL; |
| 826 | } else { |
| 827 | goto error; |
| 828 | } |
| 829 | |
| 830 | return ret; |
| 831 | error: |
| 832 | return -1; |
| 833 | } |
| 834 | |
| 835 | static int get_loglevel_type(xmlChar *loglevel_type) |
| 836 | { |
| 837 | int ret; |
| 838 | |
| 839 | if (!loglevel_type) { |
| 840 | goto error; |
| 841 | } |
| 842 | |
| 843 | if (!strcmp((char *) loglevel_type, config_loglevel_type_all)) { |
| 844 | ret = LTTNG_EVENT_LOGLEVEL_ALL; |
| 845 | } else if (!strcmp((char *) loglevel_type, config_loglevel_type_range)) { |
| 846 | ret = LTTNG_EVENT_LOGLEVEL_RANGE; |
| 847 | } else if (!strcmp((char *) loglevel_type, config_loglevel_type_single)) { |
| 848 | ret = LTTNG_EVENT_LOGLEVEL_SINGLE; |
| 849 | } else { |
| 850 | goto error; |
| 851 | } |
| 852 | |
| 853 | return ret; |
| 854 | error: |
| 855 | return -1; |
| 856 | } |
| 857 | |
| 858 | /* |
| 859 | * Return the context type or -1 on error. |
| 860 | */ |
| 861 | static int get_context_type(xmlChar *context_type) |
| 862 | { |
| 863 | int ret; |
| 864 | |
| 865 | if (!context_type) { |
| 866 | goto error; |
| 867 | } |
| 868 | |
| 869 | if (!strcmp((char *) context_type, config_event_context_pid)) { |
| 870 | ret = LTTNG_EVENT_CONTEXT_PID; |
| 871 | } else if (!strcmp((char *) context_type, config_event_context_procname)) { |
| 872 | ret = LTTNG_EVENT_CONTEXT_PROCNAME; |
| 873 | } else if (!strcmp((char *) context_type, config_event_context_prio)) { |
| 874 | ret = LTTNG_EVENT_CONTEXT_PRIO; |
| 875 | } else if (!strcmp((char *) context_type, config_event_context_nice)) { |
| 876 | ret = LTTNG_EVENT_CONTEXT_NICE; |
| 877 | } else if (!strcmp((char *) context_type, config_event_context_vpid)) { |
| 878 | ret = LTTNG_EVENT_CONTEXT_VPID; |
| 879 | } else if (!strcmp((char *) context_type, config_event_context_tid)) { |
| 880 | ret = LTTNG_EVENT_CONTEXT_TID; |
| 881 | } else if (!strcmp((char *) context_type, config_event_context_vtid)) { |
| 882 | ret = LTTNG_EVENT_CONTEXT_VTID; |
| 883 | } else if (!strcmp((char *) context_type, config_event_context_ppid)) { |
| 884 | ret = LTTNG_EVENT_CONTEXT_PPID; |
| 885 | } else if (!strcmp((char *) context_type, config_event_context_vppid)) { |
| 886 | ret = LTTNG_EVENT_CONTEXT_VPPID; |
| 887 | } else if (!strcmp((char *) context_type, config_event_context_pthread_id)) { |
| 888 | ret = LTTNG_EVENT_CONTEXT_PTHREAD_ID; |
| 889 | } else if (!strcmp((char *) context_type, config_event_context_hostname)) { |
| 890 | ret = LTTNG_EVENT_CONTEXT_HOSTNAME; |
| 891 | } else if (!strcmp((char *) context_type, config_event_context_ip)) { |
| 892 | ret = LTTNG_EVENT_CONTEXT_IP; |
| 893 | } else if (!strcmp((char *) context_type, config_event_context_interruptible)) { |
| 894 | ret = LTTNG_EVENT_CONTEXT_INTERRUPTIBLE; |
| 895 | } else if (!strcmp((char *) context_type, config_event_context_preemptible)) { |
| 896 | ret = LTTNG_EVENT_CONTEXT_PREEMPTIBLE; |
| 897 | } else if (!strcmp((char *) context_type, config_event_context_need_reschedule)) { |
| 898 | ret = LTTNG_EVENT_CONTEXT_NEED_RESCHEDULE; |
| 899 | } else if (!strcmp((char *) context_type, config_event_context_migratable)) { |
| 900 | ret = LTTNG_EVENT_CONTEXT_MIGRATABLE; |
| 901 | } else if (!strcmp((char *) context_type, config_event_context_callstack_user)) { |
| 902 | ret = LTTNG_EVENT_CONTEXT_CALLSTACK_USER; |
| 903 | } else if (!strcmp((char *) context_type, config_event_context_callstack_kernel)) { |
| 904 | ret = LTTNG_EVENT_CONTEXT_CALLSTACK_KERNEL; |
| 905 | } else if (!strcmp((char *) context_type, config_event_context_cgroup_ns)) { |
| 906 | ret = LTTNG_EVENT_CONTEXT_CGROUP_NS; |
| 907 | } else if (!strcmp((char *) context_type, config_event_context_ipc_ns)) { |
| 908 | ret = LTTNG_EVENT_CONTEXT_IPC_NS; |
| 909 | } else if (!strcmp((char *) context_type, config_event_context_mnt_ns)) { |
| 910 | ret = LTTNG_EVENT_CONTEXT_MNT_NS; |
| 911 | } else if (!strcmp((char *) context_type, config_event_context_net_ns)) { |
| 912 | ret = LTTNG_EVENT_CONTEXT_NET_NS; |
| 913 | } else if (!strcmp((char *) context_type, config_event_context_pid_ns)) { |
| 914 | ret = LTTNG_EVENT_CONTEXT_PID_NS; |
| 915 | } else if (!strcmp((char *) context_type, config_event_context_time_ns)) { |
| 916 | ret = LTTNG_EVENT_CONTEXT_TIME_NS; |
| 917 | } else if (!strcmp((char *) context_type, config_event_context_user_ns)) { |
| 918 | ret = LTTNG_EVENT_CONTEXT_USER_NS; |
| 919 | } else if (!strcmp((char *) context_type, config_event_context_uts_ns)) { |
| 920 | ret = LTTNG_EVENT_CONTEXT_UTS_NS; |
| 921 | } else if (!strcmp((char *) context_type, config_event_context_uid)) { |
| 922 | ret = LTTNG_EVENT_CONTEXT_UID; |
| 923 | } else if (!strcmp((char *) context_type, config_event_context_euid)) { |
| 924 | ret = LTTNG_EVENT_CONTEXT_EUID; |
| 925 | } else if (!strcmp((char *) context_type, config_event_context_suid)) { |
| 926 | ret = LTTNG_EVENT_CONTEXT_SUID; |
| 927 | } else if (!strcmp((char *) context_type, config_event_context_gid)) { |
| 928 | ret = LTTNG_EVENT_CONTEXT_GID; |
| 929 | } else if (!strcmp((char *) context_type, config_event_context_egid)) { |
| 930 | ret = LTTNG_EVENT_CONTEXT_EGID; |
| 931 | } else if (!strcmp((char *) context_type, config_event_context_sgid)) { |
| 932 | ret = LTTNG_EVENT_CONTEXT_SGID; |
| 933 | } else if (!strcmp((char *) context_type, config_event_context_vuid)) { |
| 934 | ret = LTTNG_EVENT_CONTEXT_VUID; |
| 935 | } else if (!strcmp((char *) context_type, config_event_context_veuid)) { |
| 936 | ret = LTTNG_EVENT_CONTEXT_VEUID; |
| 937 | } else if (!strcmp((char *) context_type, config_event_context_vsuid)) { |
| 938 | ret = LTTNG_EVENT_CONTEXT_VSUID; |
| 939 | } else if (!strcmp((char *) context_type, config_event_context_vgid)) { |
| 940 | ret = LTTNG_EVENT_CONTEXT_VGID; |
| 941 | } else if (!strcmp((char *) context_type, config_event_context_vegid)) { |
| 942 | ret = LTTNG_EVENT_CONTEXT_VEGID; |
| 943 | } else if (!strcmp((char *) context_type, config_event_context_vsgid)) { |
| 944 | ret = LTTNG_EVENT_CONTEXT_VSGID; |
| 945 | } else { |
| 946 | goto error; |
| 947 | } |
| 948 | |
| 949 | return ret; |
| 950 | error: |
| 951 | return -1; |
| 952 | } |
| 953 | |
| 954 | static int init_domain(xmlNodePtr domain_node, struct lttng_domain *domain) |
| 955 | { |
| 956 | int ret; |
| 957 | xmlNodePtr node; |
| 958 | |
| 959 | for (node = xmlFirstElementChild(domain_node); node; node = xmlNextElementSibling(node)) { |
| 960 | if (!strcmp((const char *) node->name, config_element_type)) { |
| 961 | /* domain type */ |
| 962 | xmlChar *node_content = xmlNodeGetContent(node); |
| 963 | if (!node_content) { |
| 964 | ret = -LTTNG_ERR_NOMEM; |
| 965 | goto end; |
| 966 | } |
| 967 | |
| 968 | ret = get_domain_type(node_content); |
| 969 | free(node_content); |
| 970 | if (ret < 0) { |
| 971 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; |
| 972 | goto end; |
| 973 | } |
| 974 | |
| 975 | domain->type = (lttng_domain_type) ret; |
| 976 | } else if (!strcmp((const char *) node->name, config_element_buffer_type)) { |
| 977 | /* buffer type */ |
| 978 | xmlChar *node_content = xmlNodeGetContent(node); |
| 979 | if (!node_content) { |
| 980 | ret = -LTTNG_ERR_NOMEM; |
| 981 | goto end; |
| 982 | } |
| 983 | |
| 984 | ret = get_buffer_type(node_content); |
| 985 | free(node_content); |
| 986 | if (ret < 0) { |
| 987 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; |
| 988 | goto end; |
| 989 | } |
| 990 | |
| 991 | domain->buf_type = (lttng_buffer_type) ret; |
| 992 | } |
| 993 | } |
| 994 | ret = 0; |
| 995 | end: |
| 996 | return ret; |
| 997 | } |
| 998 | |
| 999 | static int get_net_output_uris(xmlNodePtr net_output_node, char **control_uri, char **data_uri) |
| 1000 | { |
| 1001 | xmlNodePtr node; |
| 1002 | |
| 1003 | for (node = xmlFirstElementChild(net_output_node); node; |
| 1004 | node = xmlNextElementSibling(node)) { |
| 1005 | if (!strcmp((const char *) node->name, config_element_control_uri)) { |
| 1006 | /* control_uri */ |
| 1007 | *control_uri = (char *) xmlNodeGetContent(node); |
| 1008 | if (!*control_uri) { |
| 1009 | break; |
| 1010 | } |
| 1011 | } else { |
| 1012 | /* data_uri */ |
| 1013 | *data_uri = (char *) xmlNodeGetContent(node); |
| 1014 | if (!*data_uri) { |
| 1015 | break; |
| 1016 | } |
| 1017 | } |
| 1018 | } |
| 1019 | |
| 1020 | return *control_uri || *data_uri ? 0 : -LTTNG_ERR_LOAD_INVALID_CONFIG; |
| 1021 | } |
| 1022 | |
| 1023 | static int process_consumer_output(xmlNodePtr consumer_output_node, struct consumer_output *output) |
| 1024 | { |
| 1025 | int ret; |
| 1026 | xmlNodePtr node; |
| 1027 | |
| 1028 | LTTNG_ASSERT(output); |
| 1029 | |
| 1030 | for (node = xmlFirstElementChild(consumer_output_node); node; |
| 1031 | node = xmlNextElementSibling(node)) { |
| 1032 | if (!strcmp((const char *) node->name, config_element_enabled)) { |
| 1033 | xmlChar *enabled_str = xmlNodeGetContent(node); |
| 1034 | |
| 1035 | /* enabled */ |
| 1036 | if (!enabled_str) { |
| 1037 | ret = -LTTNG_ERR_NOMEM; |
| 1038 | goto end; |
| 1039 | } |
| 1040 | |
| 1041 | ret = parse_bool(enabled_str, &output->enabled); |
| 1042 | free(enabled_str); |
| 1043 | if (ret) { |
| 1044 | goto end; |
| 1045 | } |
| 1046 | } else { |
| 1047 | xmlNodePtr output_type_node; |
| 1048 | |
| 1049 | /* destination */ |
| 1050 | output_type_node = xmlFirstElementChild(node); |
| 1051 | if (!output_type_node) { |
| 1052 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; |
| 1053 | goto end; |
| 1054 | } |
| 1055 | |
| 1056 | if (!strcmp((const char *) output_type_node->name, config_element_path)) { |
| 1057 | /* path */ |
| 1058 | output->path = (char *) xmlNodeGetContent(output_type_node); |
| 1059 | if (!output->path) { |
| 1060 | ret = -LTTNG_ERR_NOMEM; |
| 1061 | goto end; |
| 1062 | } |
| 1063 | } else { |
| 1064 | /* net_output */ |
| 1065 | ret = get_net_output_uris( |
| 1066 | output_type_node, &output->control_uri, &output->data_uri); |
| 1067 | if (ret) { |
| 1068 | goto end; |
| 1069 | } |
| 1070 | } |
| 1071 | } |
| 1072 | } |
| 1073 | ret = 0; |
| 1074 | |
| 1075 | end: |
| 1076 | if (ret) { |
| 1077 | free(output->path); |
| 1078 | free(output->control_uri); |
| 1079 | free(output->data_uri); |
| 1080 | memset(output, 0, sizeof(struct consumer_output)); |
| 1081 | } |
| 1082 | return ret; |
| 1083 | } |
| 1084 | |
| 1085 | static int create_snapshot_session(const char *session_name, |
| 1086 | xmlNodePtr output_node, |
| 1087 | const struct config_load_session_override_attr *overrides) |
| 1088 | { |
| 1089 | int ret; |
| 1090 | enum lttng_error_code ret_code; |
| 1091 | xmlNodePtr node = nullptr; |
| 1092 | xmlNodePtr snapshot_output_list_node; |
| 1093 | xmlNodePtr snapshot_output_node; |
| 1094 | struct lttng_session_descriptor *session_descriptor = nullptr; |
| 1095 | |
| 1096 | LTTNG_ASSERT(session_name); |
| 1097 | LTTNG_ASSERT(output_node); |
| 1098 | |
| 1099 | /* |
| 1100 | * Use a descriptor without output since consumer output size is not |
| 1101 | * exposed by the session descriptor api. |
| 1102 | */ |
| 1103 | session_descriptor = lttng_session_descriptor_snapshot_create(session_name); |
| 1104 | if (session_descriptor == nullptr) { |
| 1105 | ret = -LTTNG_ERR_NOMEM; |
| 1106 | goto end; |
| 1107 | } |
| 1108 | |
| 1109 | ret_code = lttng_create_session_ext(session_descriptor); |
| 1110 | if (ret_code != LTTNG_OK) { |
| 1111 | ret = -ret_code; |
| 1112 | goto end; |
| 1113 | } |
| 1114 | |
| 1115 | snapshot_output_list_node = xmlFirstElementChild(output_node); |
| 1116 | |
| 1117 | /* Parse and create snapshot outputs */ |
| 1118 | for (snapshot_output_node = xmlFirstElementChild(snapshot_output_list_node); |
| 1119 | snapshot_output_node; |
| 1120 | snapshot_output_node = xmlNextElementSibling(snapshot_output_node)) { |
| 1121 | char *name = nullptr; |
| 1122 | uint64_t max_size = UINT64_MAX; |
| 1123 | struct consumer_output output = {}; |
| 1124 | struct lttng_snapshot_output *snapshot_output = nullptr; |
| 1125 | const char *control_uri = nullptr; |
| 1126 | const char *data_uri = nullptr; |
| 1127 | const char *path = nullptr; |
| 1128 | |
| 1129 | for (node = xmlFirstElementChild(snapshot_output_node); node; |
| 1130 | node = xmlNextElementSibling(node)) { |
| 1131 | if (!strcmp((const char *) node->name, config_element_name)) { |
| 1132 | /* name */ |
| 1133 | name = (char *) xmlNodeGetContent(node); |
| 1134 | if (!name) { |
| 1135 | ret = -LTTNG_ERR_NOMEM; |
| 1136 | goto error_snapshot_output; |
| 1137 | } |
| 1138 | } else if (!strcmp((const char *) node->name, config_element_max_size)) { |
| 1139 | xmlChar *content = xmlNodeGetContent(node); |
| 1140 | |
| 1141 | /* max_size */ |
| 1142 | if (!content) { |
| 1143 | ret = -LTTNG_ERR_NOMEM; |
| 1144 | goto error_snapshot_output; |
| 1145 | } |
| 1146 | ret = parse_uint(content, &max_size); |
| 1147 | free(content); |
| 1148 | if (ret) { |
| 1149 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; |
| 1150 | goto error_snapshot_output; |
| 1151 | } |
| 1152 | } else { |
| 1153 | /* consumer_output */ |
| 1154 | ret = process_consumer_output(node, &output); |
| 1155 | if (ret) { |
| 1156 | goto error_snapshot_output; |
| 1157 | } |
| 1158 | } |
| 1159 | } |
| 1160 | |
| 1161 | control_uri = output.control_uri; |
| 1162 | data_uri = output.data_uri; |
| 1163 | path = output.path; |
| 1164 | |
| 1165 | if (overrides) { |
| 1166 | if (overrides->path_url) { |
| 1167 | path = overrides->path_url; |
| 1168 | /* Control/data_uri are null */ |
| 1169 | control_uri = nullptr; |
| 1170 | data_uri = nullptr; |
| 1171 | } else { |
| 1172 | if (overrides->ctrl_url) { |
| 1173 | control_uri = overrides->ctrl_url; |
| 1174 | /* path is null */ |
| 1175 | path = nullptr; |
| 1176 | } |
| 1177 | if (overrides->data_url) { |
| 1178 | data_uri = overrides->data_url; |
| 1179 | /* path is null */ |
| 1180 | path = nullptr; |
| 1181 | } |
| 1182 | } |
| 1183 | } |
| 1184 | |
| 1185 | snapshot_output = lttng_snapshot_output_create(); |
| 1186 | if (!snapshot_output) { |
| 1187 | ret = -LTTNG_ERR_NOMEM; |
| 1188 | goto error_snapshot_output; |
| 1189 | } |
| 1190 | |
| 1191 | ret = lttng_snapshot_output_set_name(name, snapshot_output); |
| 1192 | if (ret) { |
| 1193 | goto error_snapshot_output; |
| 1194 | } |
| 1195 | |
| 1196 | ret = lttng_snapshot_output_set_size(max_size, snapshot_output); |
| 1197 | if (ret) { |
| 1198 | goto error_snapshot_output; |
| 1199 | } |
| 1200 | |
| 1201 | if (path) { |
| 1202 | ret = lttng_snapshot_output_set_ctrl_url(path, snapshot_output); |
| 1203 | if (ret) { |
| 1204 | goto error_snapshot_output; |
| 1205 | } |
| 1206 | } else { |
| 1207 | if (control_uri) { |
| 1208 | ret = lttng_snapshot_output_set_ctrl_url(control_uri, |
| 1209 | snapshot_output); |
| 1210 | if (ret) { |
| 1211 | goto error_snapshot_output; |
| 1212 | } |
| 1213 | } |
| 1214 | |
| 1215 | if (data_uri) { |
| 1216 | ret = lttng_snapshot_output_set_data_url(data_uri, snapshot_output); |
| 1217 | if (ret) { |
| 1218 | goto error_snapshot_output; |
| 1219 | } |
| 1220 | } |
| 1221 | } |
| 1222 | |
| 1223 | ret = lttng_snapshot_add_output(session_name, snapshot_output); |
| 1224 | error_snapshot_output: |
| 1225 | free(name); |
| 1226 | free(output.path); |
| 1227 | free(output.control_uri); |
| 1228 | free(output.data_uri); |
| 1229 | lttng_snapshot_output_destroy(snapshot_output); |
| 1230 | if (ret) { |
| 1231 | goto end; |
| 1232 | } |
| 1233 | } |
| 1234 | end: |
| 1235 | lttng_session_descriptor_destroy(session_descriptor); |
| 1236 | return ret; |
| 1237 | } |
| 1238 | |
| 1239 | static int create_session(const char *name, |
| 1240 | xmlNodePtr output_node, |
| 1241 | uint64_t live_timer_interval, |
| 1242 | const struct config_load_session_override_attr *overrides) |
| 1243 | { |
| 1244 | int ret = 0; |
| 1245 | enum lttng_error_code ret_code; |
| 1246 | struct consumer_output output = {}; |
| 1247 | xmlNodePtr consumer_output_node; |
| 1248 | const char *control_uri = nullptr; |
| 1249 | const char *data_uri = nullptr; |
| 1250 | const char *path = nullptr; |
| 1251 | struct lttng_session_descriptor *session_descriptor = nullptr; |
| 1252 | |
| 1253 | LTTNG_ASSERT(name); |
| 1254 | |
| 1255 | if (output_node) { |
| 1256 | consumer_output_node = xmlFirstElementChild(output_node); |
| 1257 | if (!consumer_output_node) { |
| 1258 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; |
| 1259 | goto end; |
| 1260 | } |
| 1261 | |
| 1262 | if (strcmp((const char *) consumer_output_node->name, |
| 1263 | config_element_consumer_output) != 0) { |
| 1264 | WARN("Invalid output type, expected %s node", |
| 1265 | config_element_consumer_output); |
| 1266 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; |
| 1267 | goto end; |
| 1268 | } |
| 1269 | |
| 1270 | ret = process_consumer_output(consumer_output_node, &output); |
| 1271 | if (ret) { |
| 1272 | goto end; |
| 1273 | } |
| 1274 | } |
| 1275 | |
| 1276 | control_uri = output.control_uri; |
| 1277 | data_uri = output.data_uri; |
| 1278 | path = output.path; |
| 1279 | |
| 1280 | /* Check for override and apply them */ |
| 1281 | if (overrides) { |
| 1282 | if (overrides->path_url) { |
| 1283 | path = overrides->path_url; |
| 1284 | /* control/data_uri are null */; |
| 1285 | control_uri = nullptr; |
| 1286 | data_uri = nullptr; |
| 1287 | } else { |
| 1288 | if (overrides->ctrl_url) { |
| 1289 | control_uri = overrides->ctrl_url; |
| 1290 | /* path is null */ |
| 1291 | path = nullptr; |
| 1292 | } |
| 1293 | if (overrides->data_url) { |
| 1294 | data_uri = overrides->data_url; |
| 1295 | /* path is null */ |
| 1296 | path = nullptr; |
| 1297 | } |
| 1298 | } |
| 1299 | } |
| 1300 | |
| 1301 | if (live_timer_interval != UINT64_MAX && !control_uri && !data_uri) { |
| 1302 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; |
| 1303 | goto end; |
| 1304 | } |
| 1305 | |
| 1306 | if (control_uri || data_uri) { |
| 1307 | /* network destination */ |
| 1308 | if (live_timer_interval && live_timer_interval != UINT64_MAX) { |
| 1309 | /* |
| 1310 | * URLs are provided for sure since the test above make sure that |
| 1311 | * with a live timer the data and control URIs are provided. So, |
| 1312 | * NULL is passed here and will be set right after. |
| 1313 | */ |
| 1314 | session_descriptor = lttng_session_descriptor_live_network_create( |
| 1315 | name, control_uri, data_uri, live_timer_interval); |
| 1316 | } else { |
| 1317 | session_descriptor = lttng_session_descriptor_network_create( |
| 1318 | name, control_uri, data_uri); |
| 1319 | } |
| 1320 | |
| 1321 | } else if (path != nullptr) { |
| 1322 | session_descriptor = lttng_session_descriptor_local_create(name, path); |
| 1323 | } else { |
| 1324 | /* No output */ |
| 1325 | session_descriptor = lttng_session_descriptor_create(name); |
| 1326 | } |
| 1327 | |
| 1328 | if (session_descriptor == nullptr) { |
| 1329 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; |
| 1330 | goto end; |
| 1331 | } |
| 1332 | |
| 1333 | ret_code = lttng_create_session_ext(session_descriptor); |
| 1334 | if (ret_code != LTTNG_OK) { |
| 1335 | ret = -ret_code; |
| 1336 | goto end; |
| 1337 | } |
| 1338 | |
| 1339 | end: |
| 1340 | free(output.path); |
| 1341 | free(output.control_uri); |
| 1342 | free(output.data_uri); |
| 1343 | lttng_session_descriptor_destroy(session_descriptor); |
| 1344 | return ret; |
| 1345 | } |
| 1346 | |
| 1347 | static struct lttng_userspace_probe_location * |
| 1348 | process_userspace_probe_function_attribute_node(xmlNodePtr attribute_node) |
| 1349 | { |
| 1350 | xmlNodePtr function_attribute_node; |
| 1351 | char *function_name = nullptr, *binary_path = nullptr; |
| 1352 | struct lttng_userspace_probe_location *location = nullptr; |
| 1353 | struct lttng_userspace_probe_location_lookup_method *lookup_method = nullptr; |
| 1354 | |
| 1355 | /* |
| 1356 | * Process userspace probe location function attributes. The order of |
| 1357 | * the fields are not guaranteed so we need to iterate over all fields |
| 1358 | * and check at the end if everything we need for this location type is |
| 1359 | * there. |
| 1360 | */ |
| 1361 | for (function_attribute_node = xmlFirstElementChild(attribute_node); |
| 1362 | function_attribute_node; |
| 1363 | function_attribute_node = xmlNextElementSibling(function_attribute_node)) { |
| 1364 | /* Handle function name, binary path and lookup method. */ |
| 1365 | if (!strcmp((const char *) function_attribute_node->name, |
| 1366 | config_element_userspace_probe_function_location_function_name)) { |
| 1367 | function_name = (char *) xmlNodeGetContent(function_attribute_node); |
| 1368 | if (!function_name) { |
| 1369 | goto error; |
| 1370 | } |
| 1371 | } else if (!strcmp((const char *) function_attribute_node->name, |
| 1372 | config_element_userspace_probe_location_binary_path)) { |
| 1373 | binary_path = (char *) xmlNodeGetContent(function_attribute_node); |
| 1374 | if (!binary_path) { |
| 1375 | goto error; |
| 1376 | } |
| 1377 | } else if (!strcmp((const char *) function_attribute_node->name, |
| 1378 | config_element_userspace_probe_lookup)) { |
| 1379 | char *lookup_method_name; |
| 1380 | |
| 1381 | lookup_method_name = (char *) xmlNodeGetContent(function_attribute_node); |
| 1382 | if (!lookup_method_name) { |
| 1383 | goto error; |
| 1384 | } |
| 1385 | |
| 1386 | /* |
| 1387 | * function_default lookup method defaults to |
| 1388 | * function_elf lookup method at the moment. |
| 1389 | */ |
| 1390 | if (!strcmp(lookup_method_name, |
| 1391 | config_element_userspace_probe_lookup_function_elf) || |
| 1392 | !strcmp(lookup_method_name, |
| 1393 | config_element_userspace_probe_lookup_function_default)) { |
| 1394 | lookup_method = |
| 1395 | lttng_userspace_probe_location_lookup_method_function_elf_create(); |
| 1396 | if (!lookup_method) { |
| 1397 | PERROR("Error creating function default/ELF lookup method"); |
| 1398 | } |
| 1399 | } else { |
| 1400 | WARN("Unknown function lookup method"); |
| 1401 | } |
| 1402 | |
| 1403 | free(lookup_method_name); |
| 1404 | if (!lookup_method) { |
| 1405 | goto error; |
| 1406 | } |
| 1407 | } else { |
| 1408 | goto error; |
| 1409 | } |
| 1410 | |
| 1411 | /* Check if all the necessary fields were found. */ |
| 1412 | if (binary_path && function_name && lookup_method) { |
| 1413 | /* Ownership of lookup_method is transferred. */ |
| 1414 | location = lttng_userspace_probe_location_function_create( |
| 1415 | binary_path, function_name, lookup_method); |
| 1416 | lookup_method = nullptr; |
| 1417 | goto error; |
| 1418 | } |
| 1419 | } |
| 1420 | error: |
| 1421 | lttng_userspace_probe_location_lookup_method_destroy(lookup_method); |
| 1422 | free(binary_path); |
| 1423 | free(function_name); |
| 1424 | return location; |
| 1425 | } |
| 1426 | |
| 1427 | static struct lttng_userspace_probe_location * |
| 1428 | process_userspace_probe_tracepoint_attribute_node(xmlNodePtr attribute_node) |
| 1429 | { |
| 1430 | xmlNodePtr tracepoint_attribute_node; |
| 1431 | char *probe_name = nullptr, *provider_name = nullptr, *binary_path = nullptr; |
| 1432 | struct lttng_userspace_probe_location *location = nullptr; |
| 1433 | struct lttng_userspace_probe_location_lookup_method *lookup_method = nullptr; |
| 1434 | |
| 1435 | /* |
| 1436 | * Process userspace probe location tracepoint attributes. The order of |
| 1437 | * the fields are not guaranteed so we need to iterate over all fields |
| 1438 | * and check at the end if everything we need for this location type is |
| 1439 | * there. |
| 1440 | */ |
| 1441 | for (tracepoint_attribute_node = xmlFirstElementChild(attribute_node); |
| 1442 | tracepoint_attribute_node; |
| 1443 | tracepoint_attribute_node = xmlNextElementSibling(tracepoint_attribute_node)) { |
| 1444 | if (!strcmp((const char *) tracepoint_attribute_node->name, |
| 1445 | config_element_userspace_probe_tracepoint_location_probe_name)) { |
| 1446 | probe_name = (char *) xmlNodeGetContent(tracepoint_attribute_node); |
| 1447 | if (!probe_name) { |
| 1448 | goto error; |
| 1449 | } |
| 1450 | } else if (!strcmp((const char *) tracepoint_attribute_node->name, |
| 1451 | config_element_userspace_probe_tracepoint_location_provider_name)) { |
| 1452 | provider_name = (char *) xmlNodeGetContent(tracepoint_attribute_node); |
| 1453 | if (!provider_name) { |
| 1454 | goto error; |
| 1455 | } |
| 1456 | } else if (!strcmp((const char *) tracepoint_attribute_node->name, |
| 1457 | config_element_userspace_probe_location_binary_path)) { |
| 1458 | binary_path = (char *) xmlNodeGetContent(tracepoint_attribute_node); |
| 1459 | if (!binary_path) { |
| 1460 | goto error; |
| 1461 | } |
| 1462 | } else if (!strcmp((const char *) tracepoint_attribute_node->name, |
| 1463 | config_element_userspace_probe_lookup)) { |
| 1464 | char *lookup_method_name; |
| 1465 | |
| 1466 | lookup_method_name = (char *) xmlNodeGetContent(tracepoint_attribute_node); |
| 1467 | if (!lookup_method_name) { |
| 1468 | goto error; |
| 1469 | } |
| 1470 | |
| 1471 | if (!strcmp(lookup_method_name, |
| 1472 | config_element_userspace_probe_lookup_tracepoint_sdt)) { |
| 1473 | lookup_method = |
| 1474 | lttng_userspace_probe_location_lookup_method_tracepoint_sdt_create(); |
| 1475 | if (!lookup_method) { |
| 1476 | PERROR("Error creating tracepoint SDT lookup method"); |
| 1477 | } |
| 1478 | } else { |
| 1479 | WARN("Unknown tracepoint lookup method"); |
| 1480 | } |
| 1481 | |
| 1482 | free(lookup_method_name); |
| 1483 | if (!lookup_method) { |
| 1484 | goto error; |
| 1485 | } |
| 1486 | } else { |
| 1487 | WARN("Unknown tracepoint attribute"); |
| 1488 | goto error; |
| 1489 | } |
| 1490 | |
| 1491 | /* Check if all the necessary fields were found. */ |
| 1492 | if (binary_path && provider_name && probe_name && lookup_method) { |
| 1493 | /* Ownership of lookup_method is transferred. */ |
| 1494 | location = lttng_userspace_probe_location_tracepoint_create( |
| 1495 | binary_path, provider_name, probe_name, lookup_method); |
| 1496 | lookup_method = nullptr; |
| 1497 | goto error; |
| 1498 | } |
| 1499 | } |
| 1500 | error: |
| 1501 | lttng_userspace_probe_location_lookup_method_destroy(lookup_method); |
| 1502 | free(binary_path); |
| 1503 | free(provider_name); |
| 1504 | free(probe_name); |
| 1505 | return location; |
| 1506 | } |
| 1507 | |
| 1508 | static int process_probe_attribute_node(xmlNodePtr probe_attribute_node, |
| 1509 | struct lttng_event_probe_attr *attr) |
| 1510 | { |
| 1511 | int ret; |
| 1512 | |
| 1513 | LTTNG_ASSERT(probe_attribute_node); |
| 1514 | LTTNG_ASSERT(attr); |
| 1515 | |
| 1516 | if (!strcmp((const char *) probe_attribute_node->name, config_element_address)) { |
| 1517 | xmlChar *content; |
| 1518 | uint64_t addr = 0; |
| 1519 | |
| 1520 | /* addr */ |
| 1521 | content = xmlNodeGetContent(probe_attribute_node); |
| 1522 | if (!content) { |
| 1523 | ret = -LTTNG_ERR_NOMEM; |
| 1524 | goto end; |
| 1525 | } |
| 1526 | |
| 1527 | ret = parse_uint(content, &addr); |
| 1528 | free(content); |
| 1529 | if (ret) { |
| 1530 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; |
| 1531 | goto end; |
| 1532 | } |
| 1533 | |
| 1534 | attr->addr = addr; |
| 1535 | } else if (!strcmp((const char *) probe_attribute_node->name, config_element_offset)) { |
| 1536 | xmlChar *content; |
| 1537 | uint64_t offset = 0; |
| 1538 | |
| 1539 | /* offset */ |
| 1540 | content = xmlNodeGetContent(probe_attribute_node); |
| 1541 | if (!content) { |
| 1542 | ret = -LTTNG_ERR_NOMEM; |
| 1543 | goto end; |
| 1544 | } |
| 1545 | |
| 1546 | ret = parse_uint(content, &offset); |
| 1547 | free(content); |
| 1548 | if (ret) { |
| 1549 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; |
| 1550 | goto end; |
| 1551 | } |
| 1552 | |
| 1553 | attr->offset = offset; |
| 1554 | } else if (!strcmp((const char *) probe_attribute_node->name, config_element_symbol_name)) { |
| 1555 | xmlChar *content; |
| 1556 | |
| 1557 | /* symbol_name */ |
| 1558 | content = xmlNodeGetContent(probe_attribute_node); |
| 1559 | if (!content) { |
| 1560 | ret = -LTTNG_ERR_NOMEM; |
| 1561 | goto end; |
| 1562 | } |
| 1563 | |
| 1564 | ret = lttng_strncpy( |
| 1565 | attr->symbol_name, (const char *) content, LTTNG_SYMBOL_NAME_LEN); |
| 1566 | if (ret == -1) { |
| 1567 | ERR("symbol name \"%s\"'s length (%zu) exceeds the maximal permitted length (%d) in session configuration", |
| 1568 | (const char *) content, |
| 1569 | strlen((const char *) content), |
| 1570 | LTTNG_SYMBOL_NAME_LEN); |
| 1571 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; |
| 1572 | free(content); |
| 1573 | goto end; |
| 1574 | } |
| 1575 | free(content); |
| 1576 | } |
| 1577 | ret = 0; |
| 1578 | end: |
| 1579 | return ret; |
| 1580 | } |
| 1581 | |
| 1582 | static int process_event_node(xmlNodePtr event_node, |
| 1583 | struct lttng_handle *handle, |
| 1584 | const char *channel_name, |
| 1585 | const enum process_event_node_phase phase) |
| 1586 | { |
| 1587 | int ret = 0, i; |
| 1588 | xmlNodePtr node; |
| 1589 | struct lttng_event *event; |
| 1590 | char **exclusions = nullptr; |
| 1591 | unsigned long exclusion_count = 0; |
| 1592 | char *filter_expression = nullptr; |
| 1593 | |
| 1594 | LTTNG_ASSERT(event_node); |
| 1595 | LTTNG_ASSERT(handle); |
| 1596 | LTTNG_ASSERT(channel_name); |
| 1597 | |
| 1598 | event = lttng_event_create(); |
| 1599 | if (!event) { |
| 1600 | ret = -LTTNG_ERR_NOMEM; |
| 1601 | goto end; |
| 1602 | } |
| 1603 | |
| 1604 | /* Initialize default log level which varies by domain */ |
| 1605 | switch (handle->domain.type) { |
| 1606 | case LTTNG_DOMAIN_JUL: |
| 1607 | event->loglevel = LTTNG_LOGLEVEL_JUL_ALL; |
| 1608 | break; |
| 1609 | case LTTNG_DOMAIN_LOG4J: |
| 1610 | event->loglevel = LTTNG_LOGLEVEL_LOG4J_ALL; |
| 1611 | break; |
| 1612 | case LTTNG_DOMAIN_PYTHON: |
| 1613 | event->loglevel = LTTNG_LOGLEVEL_PYTHON_DEBUG; |
| 1614 | break; |
| 1615 | case LTTNG_DOMAIN_UST: |
| 1616 | case LTTNG_DOMAIN_KERNEL: |
| 1617 | event->loglevel = LTTNG_LOGLEVEL_DEBUG; |
| 1618 | break; |
| 1619 | default: |
| 1620 | abort(); |
| 1621 | } |
| 1622 | |
| 1623 | for (node = xmlFirstElementChild(event_node); node; node = xmlNextElementSibling(node)) { |
| 1624 | if (!strcmp((const char *) node->name, config_element_name)) { |
| 1625 | xmlChar *content; |
| 1626 | |
| 1627 | /* name */ |
| 1628 | content = xmlNodeGetContent(node); |
| 1629 | if (!content) { |
| 1630 | ret = -LTTNG_ERR_NOMEM; |
| 1631 | goto end; |
| 1632 | } |
| 1633 | |
| 1634 | ret = lttng_strncpy( |
| 1635 | event->name, (const char *) content, LTTNG_SYMBOL_NAME_LEN); |
| 1636 | if (ret == -1) { |
| 1637 | WARN("Event \"%s\"'s name length (%zu) exceeds the maximal permitted length (%d) in session configuration", |
| 1638 | (const char *) content, |
| 1639 | strlen((const char *) content), |
| 1640 | LTTNG_SYMBOL_NAME_LEN); |
| 1641 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; |
| 1642 | free(content); |
| 1643 | goto end; |
| 1644 | } |
| 1645 | free(content); |
| 1646 | } else if (!strcmp((const char *) node->name, 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, config_element_type)) { |
| 1662 | xmlChar *content = xmlNodeGetContent(node); |
| 1663 | |
| 1664 | /* type */ |
| 1665 | if (!content) { |
| 1666 | ret = -LTTNG_ERR_NOMEM; |
| 1667 | goto end; |
| 1668 | } |
| 1669 | |
| 1670 | ret = get_event_type(content); |
| 1671 | free(content); |
| 1672 | if (ret < 0) { |
| 1673 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; |
| 1674 | goto end; |
| 1675 | } |
| 1676 | |
| 1677 | event->type = (lttng_event_type) ret; |
| 1678 | } else if (!strcmp((const char *) node->name, config_element_loglevel_type)) { |
| 1679 | xmlChar *content = xmlNodeGetContent(node); |
| 1680 | |
| 1681 | /* loglevel_type */ |
| 1682 | if (!content) { |
| 1683 | ret = -LTTNG_ERR_NOMEM; |
| 1684 | goto end; |
| 1685 | } |
| 1686 | |
| 1687 | ret = get_loglevel_type(content); |
| 1688 | free(content); |
| 1689 | if (ret < 0) { |
| 1690 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; |
| 1691 | goto end; |
| 1692 | } |
| 1693 | |
| 1694 | event->loglevel_type = (lttng_loglevel_type) ret; |
| 1695 | } else if (!strcmp((const char *) node->name, config_element_loglevel)) { |
| 1696 | xmlChar *content; |
| 1697 | int64_t loglevel = 0; |
| 1698 | |
| 1699 | /* loglevel */ |
| 1700 | content = xmlNodeGetContent(node); |
| 1701 | if (!content) { |
| 1702 | ret = -LTTNG_ERR_NOMEM; |
| 1703 | goto end; |
| 1704 | } |
| 1705 | |
| 1706 | ret = parse_int(content, &loglevel); |
| 1707 | free(content); |
| 1708 | if (ret) { |
| 1709 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; |
| 1710 | goto end; |
| 1711 | } |
| 1712 | |
| 1713 | if (loglevel > INT_MAX || loglevel < INT_MIN) { |
| 1714 | WARN("loglevel out of range."); |
| 1715 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; |
| 1716 | goto end; |
| 1717 | } |
| 1718 | |
| 1719 | event->loglevel = loglevel; |
| 1720 | } else if (!strcmp((const char *) node->name, config_element_filter)) { |
| 1721 | xmlChar *content = xmlNodeGetContent(node); |
| 1722 | |
| 1723 | /* filter */ |
| 1724 | if (!content) { |
| 1725 | ret = -LTTNG_ERR_NOMEM; |
| 1726 | goto end; |
| 1727 | } |
| 1728 | |
| 1729 | free(filter_expression); |
| 1730 | filter_expression = strdup((char *) content); |
| 1731 | free(content); |
| 1732 | if (!filter_expression) { |
| 1733 | ret = -LTTNG_ERR_NOMEM; |
| 1734 | goto end; |
| 1735 | } |
| 1736 | } else if (!strcmp((const char *) node->name, config_element_exclusions)) { |
| 1737 | xmlNodePtr exclusion_node; |
| 1738 | int exclusion_index = 0; |
| 1739 | |
| 1740 | /* exclusions */ |
| 1741 | if (exclusions) { |
| 1742 | /* |
| 1743 | * Exclusions has already been initialized, |
| 1744 | * invalid file. |
| 1745 | */ |
| 1746 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; |
| 1747 | goto end; |
| 1748 | } |
| 1749 | |
| 1750 | exclusion_count = xmlChildElementCount(node); |
| 1751 | if (!exclusion_count) { |
| 1752 | continue; |
| 1753 | } |
| 1754 | |
| 1755 | exclusions = calloc<char *>(exclusion_count); |
| 1756 | if (!exclusions) { |
| 1757 | exclusion_count = 0; |
| 1758 | ret = -LTTNG_ERR_NOMEM; |
| 1759 | goto end; |
| 1760 | } |
| 1761 | |
| 1762 | for (exclusion_node = xmlFirstElementChild(node); exclusion_node; |
| 1763 | exclusion_node = xmlNextElementSibling(exclusion_node)) { |
| 1764 | xmlChar *content = xmlNodeGetContent(exclusion_node); |
| 1765 | |
| 1766 | if (!content) { |
| 1767 | ret = -LTTNG_ERR_NOMEM; |
| 1768 | goto end; |
| 1769 | } |
| 1770 | |
| 1771 | exclusions[exclusion_index] = strdup((const char *) content); |
| 1772 | free(content); |
| 1773 | if (!exclusions[exclusion_index]) { |
| 1774 | ret = -LTTNG_ERR_NOMEM; |
| 1775 | goto end; |
| 1776 | } |
| 1777 | exclusion_index++; |
| 1778 | } |
| 1779 | |
| 1780 | event->exclusion = 1; |
| 1781 | } else if (!strcmp((const char *) node->name, config_element_attributes)) { |
| 1782 | xmlNodePtr attribute_node = xmlFirstElementChild(node); |
| 1783 | |
| 1784 | /* attributes */ |
| 1785 | if (!attribute_node) { |
| 1786 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; |
| 1787 | goto end; |
| 1788 | } |
| 1789 | |
| 1790 | if (!strcmp((const char *) attribute_node->name, |
| 1791 | config_element_probe_attributes)) { |
| 1792 | xmlNodePtr probe_attribute_node; |
| 1793 | |
| 1794 | /* probe_attributes */ |
| 1795 | for (probe_attribute_node = xmlFirstElementChild(attribute_node); |
| 1796 | probe_attribute_node; |
| 1797 | probe_attribute_node = |
| 1798 | xmlNextElementSibling(probe_attribute_node)) { |
| 1799 | ret = process_probe_attribute_node(probe_attribute_node, |
| 1800 | &event->attr.probe); |
| 1801 | if (ret) { |
| 1802 | goto end; |
| 1803 | } |
| 1804 | } |
| 1805 | } else if (!strcmp((const char *) attribute_node->name, |
| 1806 | config_element_function_attributes)) { |
| 1807 | size_t sym_len; |
| 1808 | xmlChar *content; |
| 1809 | xmlNodePtr symbol_node = xmlFirstElementChild(attribute_node); |
| 1810 | |
| 1811 | /* function_attributes */ |
| 1812 | content = xmlNodeGetContent(symbol_node); |
| 1813 | if (!content) { |
| 1814 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; |
| 1815 | goto end; |
| 1816 | } |
| 1817 | |
| 1818 | sym_len = strlen((char *) content); |
| 1819 | if (sym_len >= LTTNG_SYMBOL_NAME_LEN) { |
| 1820 | WARN("Function name too long."); |
| 1821 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; |
| 1822 | free(content); |
| 1823 | goto end; |
| 1824 | } |
| 1825 | |
| 1826 | ret = lttng_strncpy( |
| 1827 | event->attr.ftrace.symbol_name, (char *) content, sym_len); |
| 1828 | if (ret == -1) { |
| 1829 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; |
| 1830 | free(content); |
| 1831 | goto end; |
| 1832 | } |
| 1833 | free(content); |
| 1834 | } else if (!strcmp((const char *) attribute_node->name, |
| 1835 | config_element_userspace_probe_tracepoint_attributes)) { |
| 1836 | struct lttng_userspace_probe_location *location; |
| 1837 | |
| 1838 | location = process_userspace_probe_tracepoint_attribute_node( |
| 1839 | attribute_node); |
| 1840 | if (!location) { |
| 1841 | WARN("Error processing userspace probe tracepoint attribute"); |
| 1842 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; |
| 1843 | goto end; |
| 1844 | } |
| 1845 | ret = lttng_event_set_userspace_probe_location(event, location); |
| 1846 | if (ret) { |
| 1847 | WARN("Error setting userspace probe location field"); |
| 1848 | lttng_userspace_probe_location_destroy(location); |
| 1849 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; |
| 1850 | goto end; |
| 1851 | } |
| 1852 | } else if (!strcmp((const char *) attribute_node->name, |
| 1853 | config_element_userspace_probe_function_attributes)) { |
| 1854 | struct lttng_userspace_probe_location *location; |
| 1855 | |
| 1856 | location = process_userspace_probe_function_attribute_node( |
| 1857 | attribute_node); |
| 1858 | if (!location) { |
| 1859 | WARN("Error processing userspace probe function attribute"); |
| 1860 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; |
| 1861 | goto end; |
| 1862 | } |
| 1863 | |
| 1864 | ret = lttng_event_set_userspace_probe_location(event, location); |
| 1865 | if (ret) { |
| 1866 | WARN("Error setting userspace probe location field"); |
| 1867 | lttng_userspace_probe_location_destroy(location); |
| 1868 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; |
| 1869 | goto end; |
| 1870 | } |
| 1871 | } else { |
| 1872 | /* Unknown event attribute. */ |
| 1873 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; |
| 1874 | goto end; |
| 1875 | } |
| 1876 | } |
| 1877 | } |
| 1878 | |
| 1879 | if ((event->enabled && phase == ENABLE) || phase == CREATION) { |
| 1880 | ret = lttng_enable_event_with_exclusions( |
| 1881 | handle, event, channel_name, filter_expression, exclusion_count, exclusions); |
| 1882 | if (ret < 0) { |
| 1883 | WARN("Enabling event (name:%s) on load failed.", event->name); |
| 1884 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; |
| 1885 | goto end; |
| 1886 | } |
| 1887 | } |
| 1888 | ret = 0; |
| 1889 | end: |
| 1890 | for (i = 0; i < exclusion_count; i++) { |
| 1891 | free(exclusions[i]); |
| 1892 | } |
| 1893 | |
| 1894 | lttng_event_destroy(event); |
| 1895 | free(exclusions); |
| 1896 | free(filter_expression); |
| 1897 | return ret; |
| 1898 | } |
| 1899 | |
| 1900 | static int |
| 1901 | process_events_node(xmlNodePtr events_node, struct lttng_handle *handle, const char *channel_name) |
| 1902 | { |
| 1903 | int ret = 0; |
| 1904 | struct lttng_event event; |
| 1905 | xmlNodePtr node; |
| 1906 | |
| 1907 | LTTNG_ASSERT(events_node); |
| 1908 | LTTNG_ASSERT(handle); |
| 1909 | LTTNG_ASSERT(channel_name); |
| 1910 | |
| 1911 | for (node = xmlFirstElementChild(events_node); node; node = xmlNextElementSibling(node)) { |
| 1912 | ret = process_event_node(node, handle, channel_name, CREATION); |
| 1913 | if (ret) { |
| 1914 | goto end; |
| 1915 | } |
| 1916 | } |
| 1917 | |
| 1918 | /* |
| 1919 | * Disable all events to enable only the necessary events. |
| 1920 | * Limitations regarding lttng_disable_events and tuple descriptor |
| 1921 | * force this approach. |
| 1922 | */ |
| 1923 | memset(&event, 0, sizeof(event)); |
| 1924 | event.loglevel = -1; |
| 1925 | event.type = LTTNG_EVENT_ALL; |
| 1926 | ret = lttng_disable_event_ext(handle, &event, channel_name, nullptr); |
| 1927 | if (ret) { |
| 1928 | goto end; |
| 1929 | } |
| 1930 | |
| 1931 | for (node = xmlFirstElementChild(events_node); node; node = xmlNextElementSibling(node)) { |
| 1932 | ret = process_event_node(node, handle, channel_name, ENABLE); |
| 1933 | if (ret) { |
| 1934 | goto end; |
| 1935 | } |
| 1936 | } |
| 1937 | |
| 1938 | end: |
| 1939 | return ret; |
| 1940 | } |
| 1941 | |
| 1942 | static int process_channel_attr_node(xmlNodePtr attr_node, |
| 1943 | struct lttng_channel *channel, |
| 1944 | xmlNodePtr *contexts_node, |
| 1945 | xmlNodePtr *events_node) |
| 1946 | { |
| 1947 | int ret; |
| 1948 | |
| 1949 | LTTNG_ASSERT(attr_node); |
| 1950 | LTTNG_ASSERT(channel); |
| 1951 | LTTNG_ASSERT(contexts_node); |
| 1952 | LTTNG_ASSERT(events_node); |
| 1953 | |
| 1954 | if (!strcmp((const char *) attr_node->name, config_element_name)) { |
| 1955 | xmlChar *content; |
| 1956 | |
| 1957 | /* name */ |
| 1958 | content = xmlNodeGetContent(attr_node); |
| 1959 | if (!content) { |
| 1960 | ret = -LTTNG_ERR_NOMEM; |
| 1961 | goto end; |
| 1962 | } |
| 1963 | |
| 1964 | ret = lttng_strncpy(channel->name, (const char *) content, LTTNG_SYMBOL_NAME_LEN); |
| 1965 | if (ret == -1) { |
| 1966 | WARN("Channel \"%s\"'s name length (%zu) exceeds the maximal permitted length (%d) in session configuration", |
| 1967 | (const char *) content, |
| 1968 | strlen((const char *) content), |
| 1969 | LTTNG_SYMBOL_NAME_LEN); |
| 1970 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; |
| 1971 | free(content); |
| 1972 | goto end; |
| 1973 | } |
| 1974 | free(content); |
| 1975 | } else if (!strcmp((const char *) attr_node->name, config_element_enabled)) { |
| 1976 | xmlChar *content; |
| 1977 | int enabled; |
| 1978 | |
| 1979 | /* enabled */ |
| 1980 | content = xmlNodeGetContent(attr_node); |
| 1981 | if (!content) { |
| 1982 | ret = -LTTNG_ERR_NOMEM; |
| 1983 | goto end; |
| 1984 | } |
| 1985 | |
| 1986 | ret = parse_bool(content, &enabled); |
| 1987 | free(content); |
| 1988 | if (ret) { |
| 1989 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; |
| 1990 | goto end; |
| 1991 | } |
| 1992 | |
| 1993 | channel->enabled = enabled; |
| 1994 | } else if (!strcmp((const char *) attr_node->name, config_element_overwrite_mode)) { |
| 1995 | xmlChar *content; |
| 1996 | |
| 1997 | /* overwrite_mode */ |
| 1998 | content = xmlNodeGetContent(attr_node); |
| 1999 | if (!content) { |
| 2000 | ret = -LTTNG_ERR_NOMEM; |
| 2001 | goto end; |
| 2002 | } |
| 2003 | |
| 2004 | ret = get_overwrite_mode(content); |
| 2005 | free(content); |
| 2006 | if (ret < 0) { |
| 2007 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; |
| 2008 | goto end; |
| 2009 | } |
| 2010 | |
| 2011 | channel->attr.overwrite = ret; |
| 2012 | } else if (!strcmp((const char *) attr_node->name, config_element_subbuf_size)) { |
| 2013 | xmlChar *content; |
| 2014 | |
| 2015 | /* subbuffer_size */ |
| 2016 | content = xmlNodeGetContent(attr_node); |
| 2017 | if (!content) { |
| 2018 | ret = -LTTNG_ERR_NOMEM; |
| 2019 | goto end; |
| 2020 | } |
| 2021 | |
| 2022 | ret = parse_uint(content, &channel->attr.subbuf_size); |
| 2023 | free(content); |
| 2024 | if (ret) { |
| 2025 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; |
| 2026 | goto end; |
| 2027 | } |
| 2028 | } else if (!strcmp((const char *) attr_node->name, config_element_num_subbuf)) { |
| 2029 | xmlChar *content; |
| 2030 | |
| 2031 | /* subbuffer_count */ |
| 2032 | content = xmlNodeGetContent(attr_node); |
| 2033 | if (!content) { |
| 2034 | ret = -LTTNG_ERR_NOMEM; |
| 2035 | goto end; |
| 2036 | } |
| 2037 | |
| 2038 | ret = parse_uint(content, &channel->attr.num_subbuf); |
| 2039 | free(content); |
| 2040 | if (ret) { |
| 2041 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; |
| 2042 | goto end; |
| 2043 | } |
| 2044 | } else if (!strcmp((const char *) attr_node->name, config_element_switch_timer_interval)) { |
| 2045 | xmlChar *content; |
| 2046 | uint64_t switch_timer_interval = 0; |
| 2047 | |
| 2048 | /* switch_timer_interval */ |
| 2049 | content = xmlNodeGetContent(attr_node); |
| 2050 | if (!content) { |
| 2051 | ret = -LTTNG_ERR_NOMEM; |
| 2052 | goto end; |
| 2053 | } |
| 2054 | |
| 2055 | ret = parse_uint(content, &switch_timer_interval); |
| 2056 | free(content); |
| 2057 | if (ret) { |
| 2058 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; |
| 2059 | goto end; |
| 2060 | } |
| 2061 | |
| 2062 | if (switch_timer_interval > UINT_MAX) { |
| 2063 | WARN("switch_timer_interval out of range."); |
| 2064 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; |
| 2065 | goto end; |
| 2066 | } |
| 2067 | |
| 2068 | channel->attr.switch_timer_interval = switch_timer_interval; |
| 2069 | } else if (!strcmp((const char *) attr_node->name, config_element_read_timer_interval)) { |
| 2070 | xmlChar *content; |
| 2071 | uint64_t read_timer_interval = 0; |
| 2072 | |
| 2073 | /* read_timer_interval */ |
| 2074 | content = xmlNodeGetContent(attr_node); |
| 2075 | if (!content) { |
| 2076 | ret = -LTTNG_ERR_NOMEM; |
| 2077 | goto end; |
| 2078 | } |
| 2079 | |
| 2080 | ret = parse_uint(content, &read_timer_interval); |
| 2081 | free(content); |
| 2082 | if (ret) { |
| 2083 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; |
| 2084 | goto end; |
| 2085 | } |
| 2086 | |
| 2087 | if (read_timer_interval > UINT_MAX) { |
| 2088 | WARN("read_timer_interval out of range."); |
| 2089 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; |
| 2090 | goto end; |
| 2091 | } |
| 2092 | |
| 2093 | channel->attr.read_timer_interval = read_timer_interval; |
| 2094 | } else if (!strcmp((const char *) attr_node->name, config_element_output_type)) { |
| 2095 | xmlChar *content; |
| 2096 | |
| 2097 | /* output_type */ |
| 2098 | content = xmlNodeGetContent(attr_node); |
| 2099 | if (!content) { |
| 2100 | ret = -LTTNG_ERR_NOMEM; |
| 2101 | goto end; |
| 2102 | } |
| 2103 | |
| 2104 | ret = get_output_type(content); |
| 2105 | free(content); |
| 2106 | if (ret < 0) { |
| 2107 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; |
| 2108 | goto end; |
| 2109 | } |
| 2110 | |
| 2111 | channel->attr.output = (lttng_event_output) ret; |
| 2112 | } else if (!strcmp((const char *) attr_node->name, config_element_tracefile_size)) { |
| 2113 | xmlChar *content; |
| 2114 | |
| 2115 | /* tracefile_size */ |
| 2116 | content = xmlNodeGetContent(attr_node); |
| 2117 | if (!content) { |
| 2118 | ret = -LTTNG_ERR_NOMEM; |
| 2119 | goto end; |
| 2120 | } |
| 2121 | |
| 2122 | ret = parse_uint(content, &channel->attr.tracefile_size); |
| 2123 | free(content); |
| 2124 | if (ret) { |
| 2125 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; |
| 2126 | goto end; |
| 2127 | } |
| 2128 | } else if (!strcmp((const char *) attr_node->name, config_element_tracefile_count)) { |
| 2129 | xmlChar *content; |
| 2130 | |
| 2131 | /* tracefile_count */ |
| 2132 | content = xmlNodeGetContent(attr_node); |
| 2133 | if (!content) { |
| 2134 | ret = -LTTNG_ERR_NOMEM; |
| 2135 | goto end; |
| 2136 | } |
| 2137 | |
| 2138 | ret = parse_uint(content, &channel->attr.tracefile_count); |
| 2139 | free(content); |
| 2140 | if (ret) { |
| 2141 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; |
| 2142 | goto end; |
| 2143 | } |
| 2144 | } else if (!strcmp((const char *) attr_node->name, config_element_live_timer_interval)) { |
| 2145 | xmlChar *content; |
| 2146 | uint64_t live_timer_interval = 0; |
| 2147 | |
| 2148 | /* live_timer_interval */ |
| 2149 | content = xmlNodeGetContent(attr_node); |
| 2150 | if (!content) { |
| 2151 | ret = -LTTNG_ERR_NOMEM; |
| 2152 | goto end; |
| 2153 | } |
| 2154 | |
| 2155 | ret = parse_uint(content, &live_timer_interval); |
| 2156 | free(content); |
| 2157 | if (ret) { |
| 2158 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; |
| 2159 | goto end; |
| 2160 | } |
| 2161 | |
| 2162 | if (live_timer_interval > UINT_MAX) { |
| 2163 | WARN("live_timer_interval out of range."); |
| 2164 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; |
| 2165 | goto end; |
| 2166 | } |
| 2167 | |
| 2168 | channel->attr.live_timer_interval = live_timer_interval; |
| 2169 | } else if (!strcmp((const char *) attr_node->name, config_element_monitor_timer_interval)) { |
| 2170 | xmlChar *content; |
| 2171 | uint64_t monitor_timer_interval = 0; |
| 2172 | |
| 2173 | /* monitor_timer_interval */ |
| 2174 | content = xmlNodeGetContent(attr_node); |
| 2175 | if (!content) { |
| 2176 | ret = -LTTNG_ERR_NOMEM; |
| 2177 | goto end; |
| 2178 | } |
| 2179 | |
| 2180 | ret = parse_uint(content, &monitor_timer_interval); |
| 2181 | free(content); |
| 2182 | if (ret) { |
| 2183 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; |
| 2184 | goto end; |
| 2185 | } |
| 2186 | |
| 2187 | ret = lttng_channel_set_monitor_timer_interval(channel, monitor_timer_interval); |
| 2188 | if (ret) { |
| 2189 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; |
| 2190 | goto end; |
| 2191 | } |
| 2192 | } else if (!strcmp((const char *) attr_node->name, config_element_blocking_timeout)) { |
| 2193 | xmlChar *content; |
| 2194 | int64_t blocking_timeout = 0; |
| 2195 | |
| 2196 | /* blocking_timeout */ |
| 2197 | content = xmlNodeGetContent(attr_node); |
| 2198 | if (!content) { |
| 2199 | ret = -LTTNG_ERR_NOMEM; |
| 2200 | goto end; |
| 2201 | } |
| 2202 | |
| 2203 | ret = parse_int(content, &blocking_timeout); |
| 2204 | free(content); |
| 2205 | if (ret) { |
| 2206 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; |
| 2207 | goto end; |
| 2208 | } |
| 2209 | |
| 2210 | ret = lttng_channel_set_blocking_timeout(channel, blocking_timeout); |
| 2211 | if (ret) { |
| 2212 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; |
| 2213 | goto end; |
| 2214 | } |
| 2215 | } else if (!strcmp((const char *) attr_node->name, config_element_events)) { |
| 2216 | /* events */ |
| 2217 | *events_node = attr_node; |
| 2218 | } else { |
| 2219 | /* contexts */ |
| 2220 | *contexts_node = attr_node; |
| 2221 | } |
| 2222 | ret = 0; |
| 2223 | end: |
| 2224 | return ret; |
| 2225 | } |
| 2226 | |
| 2227 | static int |
| 2228 | process_context_node(xmlNodePtr context_node, struct lttng_handle *handle, const char *channel_name) |
| 2229 | { |
| 2230 | int ret; |
| 2231 | struct lttng_event_context context; |
| 2232 | xmlNodePtr context_child_node = xmlFirstElementChild(context_node); |
| 2233 | |
| 2234 | LTTNG_ASSERT(handle); |
| 2235 | LTTNG_ASSERT(channel_name); |
| 2236 | |
| 2237 | if (!context_child_node) { |
| 2238 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; |
| 2239 | goto end; |
| 2240 | } |
| 2241 | |
| 2242 | memset(&context, 0, sizeof(context)); |
| 2243 | |
| 2244 | if (!strcmp((const char *) context_child_node->name, config_element_type)) { |
| 2245 | /* type */ |
| 2246 | xmlChar *content = xmlNodeGetContent(context_child_node); |
| 2247 | |
| 2248 | if (!content) { |
| 2249 | ret = -LTTNG_ERR_NOMEM; |
| 2250 | goto end; |
| 2251 | } |
| 2252 | |
| 2253 | ret = get_context_type(content); |
| 2254 | free(content); |
| 2255 | if (ret < 0) { |
| 2256 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; |
| 2257 | goto end; |
| 2258 | } |
| 2259 | |
| 2260 | context.ctx = (lttng_event_context_type) ret; |
| 2261 | } else if (!strcmp((const char *) context_child_node->name, config_element_context_perf)) { |
| 2262 | /* perf */ |
| 2263 | xmlNodePtr perf_attr_node; |
| 2264 | |
| 2265 | context.ctx = handle->domain.type == LTTNG_DOMAIN_KERNEL ? |
| 2266 | LTTNG_EVENT_CONTEXT_PERF_CPU_COUNTER : |
| 2267 | LTTNG_EVENT_CONTEXT_PERF_THREAD_COUNTER; |
| 2268 | for (perf_attr_node = xmlFirstElementChild(context_child_node); perf_attr_node; |
| 2269 | perf_attr_node = xmlNextElementSibling(perf_attr_node)) { |
| 2270 | if (!strcmp((const char *) perf_attr_node->name, config_element_type)) { |
| 2271 | xmlChar *content; |
| 2272 | uint64_t type = 0; |
| 2273 | |
| 2274 | /* type */ |
| 2275 | content = xmlNodeGetContent(perf_attr_node); |
| 2276 | if (!content) { |
| 2277 | ret = -LTTNG_ERR_NOMEM; |
| 2278 | goto end; |
| 2279 | } |
| 2280 | |
| 2281 | ret = parse_uint(content, &type); |
| 2282 | free(content); |
| 2283 | if (ret) { |
| 2284 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; |
| 2285 | goto end; |
| 2286 | } |
| 2287 | |
| 2288 | if (type > UINT32_MAX) { |
| 2289 | WARN("perf context type out of range."); |
| 2290 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; |
| 2291 | goto end; |
| 2292 | } |
| 2293 | |
| 2294 | context.u.perf_counter.type = type; |
| 2295 | } else if (!strcmp((const char *) perf_attr_node->name, |
| 2296 | config_element_config)) { |
| 2297 | xmlChar *content; |
| 2298 | uint64_t config = 0; |
| 2299 | |
| 2300 | /* config */ |
| 2301 | content = xmlNodeGetContent(perf_attr_node); |
| 2302 | if (!content) { |
| 2303 | ret = -LTTNG_ERR_NOMEM; |
| 2304 | goto end; |
| 2305 | } |
| 2306 | |
| 2307 | ret = parse_uint(content, &config); |
| 2308 | free(content); |
| 2309 | if (ret) { |
| 2310 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; |
| 2311 | goto end; |
| 2312 | } |
| 2313 | |
| 2314 | context.u.perf_counter.config = config; |
| 2315 | } else if (!strcmp((const char *) perf_attr_node->name, |
| 2316 | config_element_name)) { |
| 2317 | xmlChar *content; |
| 2318 | |
| 2319 | /* name */ |
| 2320 | content = xmlNodeGetContent(perf_attr_node); |
| 2321 | if (!content) { |
| 2322 | ret = -LTTNG_ERR_NOMEM; |
| 2323 | goto end; |
| 2324 | } |
| 2325 | |
| 2326 | ret = lttng_strncpy(context.u.perf_counter.name, |
| 2327 | (const char *) content, |
| 2328 | LTTNG_SYMBOL_NAME_LEN); |
| 2329 | if (ret == -1) { |
| 2330 | WARN("Perf counter \"%s\"'s name length (%zu) exceeds the maximal permitted length (%d) in session configuration", |
| 2331 | (const char *) content, |
| 2332 | strlen((const char *) content), |
| 2333 | LTTNG_SYMBOL_NAME_LEN); |
| 2334 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; |
| 2335 | free(content); |
| 2336 | goto end; |
| 2337 | } |
| 2338 | free(content); |
| 2339 | } |
| 2340 | } |
| 2341 | } else if (!strcmp((const char *) context_child_node->name, config_element_context_app)) { |
| 2342 | /* application context */ |
| 2343 | xmlNodePtr app_ctx_node; |
| 2344 | |
| 2345 | context.ctx = LTTNG_EVENT_CONTEXT_APP_CONTEXT; |
| 2346 | for (app_ctx_node = xmlFirstElementChild(context_child_node); app_ctx_node; |
| 2347 | app_ctx_node = xmlNextElementSibling(app_ctx_node)) { |
| 2348 | xmlChar *content; |
| 2349 | char **target = strcmp((const char *) app_ctx_node->name, |
| 2350 | config_element_context_app_provider_name) == 0 ? |
| 2351 | &context.u.app_ctx.provider_name : |
| 2352 | &context.u.app_ctx.ctx_name; |
| 2353 | |
| 2354 | content = xmlNodeGetContent(app_ctx_node); |
| 2355 | if (!content) { |
| 2356 | ret = -LTTNG_ERR_NOMEM; |
| 2357 | goto end; |
| 2358 | } |
| 2359 | |
| 2360 | *target = (char *) content; |
| 2361 | } |
| 2362 | } else { |
| 2363 | /* Unrecognized context type */ |
| 2364 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; |
| 2365 | goto end; |
| 2366 | } |
| 2367 | |
| 2368 | ret = lttng_add_context(handle, &context, nullptr, channel_name); |
| 2369 | if (context.ctx == LTTNG_EVENT_CONTEXT_APP_CONTEXT) { |
| 2370 | free(context.u.app_ctx.provider_name); |
| 2371 | free(context.u.app_ctx.ctx_name); |
| 2372 | } |
| 2373 | end: |
| 2374 | return ret; |
| 2375 | } |
| 2376 | |
| 2377 | static int process_contexts_node(xmlNodePtr contexts_node, |
| 2378 | struct lttng_handle *handle, |
| 2379 | const char *channel_name) |
| 2380 | { |
| 2381 | int ret = 0; |
| 2382 | xmlNodePtr context_node; |
| 2383 | |
| 2384 | for (context_node = xmlFirstElementChild(contexts_node); context_node; |
| 2385 | context_node = xmlNextElementSibling(context_node)) { |
| 2386 | ret = process_context_node(context_node, handle, channel_name); |
| 2387 | if (ret) { |
| 2388 | goto end; |
| 2389 | } |
| 2390 | } |
| 2391 | end: |
| 2392 | return ret; |
| 2393 | } |
| 2394 | |
| 2395 | static int get_tracker_elements(enum lttng_process_attr process_attr, |
| 2396 | const char **element_id_tracker, |
| 2397 | const char **element_value_type, |
| 2398 | const char **element_value, |
| 2399 | const char **element_value_alias, |
| 2400 | const char **element_name) |
| 2401 | { |
| 2402 | int ret = 0; |
| 2403 | |
| 2404 | switch (process_attr) { |
| 2405 | case LTTNG_PROCESS_ATTR_PROCESS_ID: |
| 2406 | *element_id_tracker = config_element_process_attr_tracker_pid; |
| 2407 | *element_value_type = config_element_process_attr_pid_value; |
| 2408 | *element_value = config_element_process_attr_id; |
| 2409 | *element_value_alias = config_element_process_attr_id; |
| 2410 | *element_name = nullptr; |
| 2411 | break; |
| 2412 | case LTTNG_PROCESS_ATTR_VIRTUAL_PROCESS_ID: |
| 2413 | *element_id_tracker = config_element_process_attr_tracker_vpid; |
| 2414 | *element_value_type = config_element_process_attr_vpid_value; |
| 2415 | *element_value = config_element_process_attr_id; |
| 2416 | *element_value_alias = nullptr; |
| 2417 | *element_name = nullptr; |
| 2418 | break; |
| 2419 | case LTTNG_PROCESS_ATTR_USER_ID: |
| 2420 | *element_id_tracker = config_element_process_attr_tracker_uid; |
| 2421 | *element_value_type = config_element_process_attr_uid_value; |
| 2422 | *element_value = config_element_process_attr_id; |
| 2423 | *element_value_alias = nullptr; |
| 2424 | *element_name = config_element_name; |
| 2425 | break; |
| 2426 | case LTTNG_PROCESS_ATTR_VIRTUAL_USER_ID: |
| 2427 | *element_id_tracker = config_element_process_attr_tracker_vuid; |
| 2428 | *element_value_type = config_element_process_attr_vuid_value; |
| 2429 | *element_value = config_element_process_attr_id; |
| 2430 | *element_value_alias = nullptr; |
| 2431 | *element_name = config_element_name; |
| 2432 | break; |
| 2433 | case LTTNG_PROCESS_ATTR_GROUP_ID: |
| 2434 | *element_id_tracker = config_element_process_attr_tracker_gid; |
| 2435 | *element_value_type = config_element_process_attr_gid_value; |
| 2436 | *element_value = config_element_process_attr_id; |
| 2437 | *element_value_alias = nullptr; |
| 2438 | *element_name = config_element_name; |
| 2439 | break; |
| 2440 | case LTTNG_PROCESS_ATTR_VIRTUAL_GROUP_ID: |
| 2441 | *element_id_tracker = config_element_process_attr_tracker_vgid; |
| 2442 | *element_value_type = config_element_process_attr_vgid_value; |
| 2443 | *element_value = config_element_process_attr_id; |
| 2444 | *element_value_alias = nullptr; |
| 2445 | *element_name = config_element_name; |
| 2446 | break; |
| 2447 | default: |
| 2448 | ret = LTTNG_ERR_INVALID; |
| 2449 | } |
| 2450 | return ret; |
| 2451 | } |
| 2452 | |
| 2453 | static int process_legacy_pid_tracker_node(xmlNodePtr trackers_node, struct lttng_handle *handle) |
| 2454 | { |
| 2455 | int ret = 0, child_count; |
| 2456 | xmlNodePtr targets_node = nullptr; |
| 2457 | xmlNodePtr node; |
| 2458 | const char *element_id_tracker; |
| 2459 | const char *element_target_id; |
| 2460 | const char *element_id; |
| 2461 | const char *element_id_alias; |
| 2462 | const char *element_name; |
| 2463 | enum lttng_error_code tracker_handle_ret_code; |
| 2464 | struct lttng_process_attr_tracker_handle *tracker_handle = nullptr; |
| 2465 | enum lttng_process_attr_tracker_handle_status status; |
| 2466 | const enum lttng_process_attr process_attr = handle->domain.type == LTTNG_DOMAIN_UST ? |
| 2467 | LTTNG_PROCESS_ATTR_VIRTUAL_PROCESS_ID : |
| 2468 | LTTNG_PROCESS_ATTR_PROCESS_ID; |
| 2469 | |
| 2470 | LTTNG_ASSERT(handle); |
| 2471 | |
| 2472 | tracker_handle_ret_code = lttng_session_get_tracker_handle( |
| 2473 | handle->session_name, handle->domain.type, process_attr, &tracker_handle); |
| 2474 | if (tracker_handle_ret_code != LTTNG_OK) { |
| 2475 | ret = LTTNG_ERR_INVALID; |
| 2476 | goto end; |
| 2477 | } |
| 2478 | |
| 2479 | ret = get_tracker_elements(process_attr, |
| 2480 | &element_id_tracker, |
| 2481 | &element_target_id, |
| 2482 | &element_id, |
| 2483 | &element_id_alias, |
| 2484 | &element_name); |
| 2485 | if (ret) { |
| 2486 | goto end; |
| 2487 | } |
| 2488 | |
| 2489 | /* Get the targets node */ |
| 2490 | for (node = xmlFirstElementChild(trackers_node); node; node = xmlNextElementSibling(node)) { |
| 2491 | if (!strcmp((const char *) node->name, config_element_tracker_targets_legacy)) { |
| 2492 | targets_node = node; |
| 2493 | break; |
| 2494 | } |
| 2495 | } |
| 2496 | |
| 2497 | if (!targets_node) { |
| 2498 | ret = LTTNG_ERR_INVALID; |
| 2499 | goto end; |
| 2500 | } |
| 2501 | |
| 2502 | /* Go through all id target node */ |
| 2503 | child_count = xmlChildElementCount(targets_node); |
| 2504 | status = lttng_process_attr_tracker_handle_set_tracking_policy( |
| 2505 | tracker_handle, |
| 2506 | child_count == 0 ? LTTNG_TRACKING_POLICY_EXCLUDE_ALL : |
| 2507 | LTTNG_TRACKING_POLICY_INCLUDE_SET); |
| 2508 | if (status != LTTNG_PROCESS_ATTR_TRACKER_HANDLE_STATUS_OK) { |
| 2509 | ret = LTTNG_ERR_UNK; |
| 2510 | goto end; |
| 2511 | } |
| 2512 | |
| 2513 | /* Add all tracked values. */ |
| 2514 | for (node = xmlFirstElementChild(targets_node); node; node = xmlNextElementSibling(node)) { |
| 2515 | xmlNodePtr pid_target_node = node; |
| 2516 | |
| 2517 | /* get pid_target node and track it */ |
| 2518 | for (node = xmlFirstElementChild(pid_target_node); node; |
| 2519 | node = xmlNextElementSibling(node)) { |
| 2520 | if (!strcmp((const char *) node->name, config_element_tracker_pid_legacy)) { |
| 2521 | int64_t id; |
| 2522 | xmlChar *content = xmlNodeGetContent(node); |
| 2523 | |
| 2524 | if (!content) { |
| 2525 | ret = LTTNG_ERR_LOAD_INVALID_CONFIG; |
| 2526 | goto end; |
| 2527 | } |
| 2528 | |
| 2529 | ret = parse_int(content, &id); |
| 2530 | free(content); |
| 2531 | if (ret) { |
| 2532 | ret = LTTNG_ERR_LOAD_INVALID_CONFIG; |
| 2533 | goto end; |
| 2534 | } |
| 2535 | |
| 2536 | switch (process_attr) { |
| 2537 | case LTTNG_PROCESS_ATTR_PROCESS_ID: |
| 2538 | status = |
| 2539 | lttng_process_attr_process_id_tracker_handle_add_pid( |
| 2540 | tracker_handle, (pid_t) id); |
| 2541 | break; |
| 2542 | case LTTNG_PROCESS_ATTR_VIRTUAL_PROCESS_ID: |
| 2543 | status = |
| 2544 | lttng_process_attr_virtual_process_id_tracker_handle_add_pid( |
| 2545 | tracker_handle, (pid_t) id); |
| 2546 | break; |
| 2547 | default: |
| 2548 | ret = LTTNG_ERR_INVALID; |
| 2549 | goto end; |
| 2550 | } |
| 2551 | } |
| 2552 | switch (status) { |
| 2553 | case LTTNG_PROCESS_ATTR_TRACKER_HANDLE_STATUS_OK: |
| 2554 | continue; |
| 2555 | case LTTNG_PROCESS_ATTR_TRACKER_HANDLE_STATUS_INVALID: |
| 2556 | ret = LTTNG_ERR_INVALID; |
| 2557 | break; |
| 2558 | case LTTNG_PROCESS_ATTR_TRACKER_HANDLE_STATUS_EXISTS: |
| 2559 | ret = LTTNG_ERR_PROCESS_ATTR_EXISTS; |
| 2560 | break; |
| 2561 | case LTTNG_PROCESS_ATTR_TRACKER_HANDLE_STATUS_MISSING: |
| 2562 | ret = LTTNG_ERR_PROCESS_ATTR_MISSING; |
| 2563 | break; |
| 2564 | case LTTNG_PROCESS_ATTR_TRACKER_HANDLE_STATUS_ERROR: |
| 2565 | case LTTNG_PROCESS_ATTR_TRACKER_HANDLE_STATUS_COMMUNICATION_ERROR: |
| 2566 | default: |
| 2567 | ret = LTTNG_ERR_UNK; |
| 2568 | goto end; |
| 2569 | } |
| 2570 | } |
| 2571 | node = pid_target_node; |
| 2572 | } |
| 2573 | |
| 2574 | end: |
| 2575 | lttng_process_attr_tracker_handle_destroy(tracker_handle); |
| 2576 | return ret; |
| 2577 | } |
| 2578 | |
| 2579 | static int process_id_tracker_node(xmlNodePtr id_tracker_node, |
| 2580 | struct lttng_handle *handle, |
| 2581 | enum lttng_process_attr process_attr) |
| 2582 | { |
| 2583 | int ret = 0, child_count; |
| 2584 | xmlNodePtr values_node = nullptr; |
| 2585 | xmlNodePtr node; |
| 2586 | const char *element_id_tracker; |
| 2587 | const char *element_target_id; |
| 2588 | const char *element_id; |
| 2589 | const char *element_id_alias; |
| 2590 | const char *element_name; |
| 2591 | enum lttng_error_code tracker_handle_ret_code; |
| 2592 | struct lttng_process_attr_tracker_handle *tracker_handle = nullptr; |
| 2593 | enum lttng_process_attr_tracker_handle_status status; |
| 2594 | |
| 2595 | LTTNG_ASSERT(handle); |
| 2596 | LTTNG_ASSERT(id_tracker_node); |
| 2597 | |
| 2598 | tracker_handle_ret_code = lttng_session_get_tracker_handle( |
| 2599 | handle->session_name, handle->domain.type, process_attr, &tracker_handle); |
| 2600 | if (tracker_handle_ret_code != LTTNG_OK) { |
| 2601 | ret = LTTNG_ERR_INVALID; |
| 2602 | goto end; |
| 2603 | } |
| 2604 | |
| 2605 | ret = get_tracker_elements(process_attr, |
| 2606 | &element_id_tracker, |
| 2607 | &element_target_id, |
| 2608 | &element_id, |
| 2609 | &element_id_alias, |
| 2610 | &element_name); |
| 2611 | if (ret) { |
| 2612 | goto end; |
| 2613 | } |
| 2614 | |
| 2615 | /* get the values node */ |
| 2616 | for (node = xmlFirstElementChild(id_tracker_node); node; |
| 2617 | node = xmlNextElementSibling(node)) { |
| 2618 | if (!strcmp((const char *) node->name, config_element_process_attr_values)) { |
| 2619 | values_node = node; |
| 2620 | break; |
| 2621 | } |
| 2622 | } |
| 2623 | |
| 2624 | if (!values_node) { |
| 2625 | ret = LTTNG_ERR_INVALID; |
| 2626 | goto end; |
| 2627 | } |
| 2628 | |
| 2629 | /* Go through all id target node */ |
| 2630 | child_count = xmlChildElementCount(values_node); |
| 2631 | status = lttng_process_attr_tracker_handle_set_tracking_policy( |
| 2632 | tracker_handle, |
| 2633 | child_count == 0 ? LTTNG_TRACKING_POLICY_EXCLUDE_ALL : |
| 2634 | LTTNG_TRACKING_POLICY_INCLUDE_SET); |
| 2635 | if (status != LTTNG_PROCESS_ATTR_TRACKER_HANDLE_STATUS_OK) { |
| 2636 | ret = LTTNG_ERR_UNK; |
| 2637 | goto end; |
| 2638 | } |
| 2639 | |
| 2640 | /* Add all tracked values. */ |
| 2641 | for (node = xmlFirstElementChild(values_node); node; node = xmlNextElementSibling(node)) { |
| 2642 | xmlNodePtr id_target_node = node; |
| 2643 | |
| 2644 | /* get id node and track it */ |
| 2645 | for (node = xmlFirstElementChild(id_target_node); node; |
| 2646 | node = xmlNextElementSibling(node)) { |
| 2647 | if (!strcmp((const char *) node->name, element_id) || |
| 2648 | (element_id_alias && |
| 2649 | !strcmp((const char *) node->name, element_id_alias))) { |
| 2650 | int64_t id; |
| 2651 | xmlChar *content = xmlNodeGetContent(node); |
| 2652 | |
| 2653 | if (!content) { |
| 2654 | ret = LTTNG_ERR_LOAD_INVALID_CONFIG; |
| 2655 | goto end; |
| 2656 | } |
| 2657 | |
| 2658 | ret = parse_int(content, &id); |
| 2659 | free(content); |
| 2660 | if (ret) { |
| 2661 | ret = LTTNG_ERR_LOAD_INVALID_CONFIG; |
| 2662 | goto end; |
| 2663 | } |
| 2664 | |
| 2665 | switch (process_attr) { |
| 2666 | case LTTNG_PROCESS_ATTR_PROCESS_ID: |
| 2667 | status = |
| 2668 | lttng_process_attr_process_id_tracker_handle_add_pid( |
| 2669 | tracker_handle, (pid_t) id); |
| 2670 | break; |
| 2671 | case LTTNG_PROCESS_ATTR_VIRTUAL_PROCESS_ID: |
| 2672 | status = |
| 2673 | lttng_process_attr_virtual_process_id_tracker_handle_add_pid( |
| 2674 | tracker_handle, (pid_t) id); |
| 2675 | break; |
| 2676 | case LTTNG_PROCESS_ATTR_USER_ID: |
| 2677 | status = lttng_process_attr_user_id_tracker_handle_add_uid( |
| 2678 | tracker_handle, (uid_t) id); |
| 2679 | break; |
| 2680 | case LTTNG_PROCESS_ATTR_VIRTUAL_USER_ID: |
| 2681 | status = |
| 2682 | lttng_process_attr_virtual_user_id_tracker_handle_add_uid( |
| 2683 | tracker_handle, (uid_t) id); |
| 2684 | break; |
| 2685 | case LTTNG_PROCESS_ATTR_GROUP_ID: |
| 2686 | status = lttng_process_attr_group_id_tracker_handle_add_gid( |
| 2687 | tracker_handle, (gid_t) id); |
| 2688 | break; |
| 2689 | case LTTNG_PROCESS_ATTR_VIRTUAL_GROUP_ID: |
| 2690 | status = |
| 2691 | lttng_process_attr_virtual_group_id_tracker_handle_add_gid( |
| 2692 | tracker_handle, (gid_t) id); |
| 2693 | break; |
| 2694 | default: |
| 2695 | ret = LTTNG_ERR_INVALID; |
| 2696 | goto end; |
| 2697 | } |
| 2698 | } else if (element_name && |
| 2699 | !strcmp((const char *) node->name, element_name)) { |
| 2700 | xmlChar *content = xmlNodeGetContent(node); |
| 2701 | |
| 2702 | if (!content) { |
| 2703 | ret = LTTNG_ERR_LOAD_INVALID_CONFIG; |
| 2704 | goto end; |
| 2705 | } |
| 2706 | |
| 2707 | switch (process_attr) { |
| 2708 | case LTTNG_PROCESS_ATTR_USER_ID: |
| 2709 | status = |
| 2710 | lttng_process_attr_user_id_tracker_handle_add_user_name( |
| 2711 | tracker_handle, (const char *) content); |
| 2712 | break; |
| 2713 | case LTTNG_PROCESS_ATTR_VIRTUAL_USER_ID: |
| 2714 | status = |
| 2715 | lttng_process_attr_virtual_user_id_tracker_handle_add_user_name( |
| 2716 | tracker_handle, (const char *) content); |
| 2717 | break; |
| 2718 | case LTTNG_PROCESS_ATTR_GROUP_ID: |
| 2719 | status = |
| 2720 | lttng_process_attr_group_id_tracker_handle_add_group_name( |
| 2721 | tracker_handle, (const char *) content); |
| 2722 | break; |
| 2723 | case LTTNG_PROCESS_ATTR_VIRTUAL_GROUP_ID: |
| 2724 | status = |
| 2725 | lttng_process_attr_virtual_group_id_tracker_handle_add_group_name( |
| 2726 | tracker_handle, (const char *) content); |
| 2727 | break; |
| 2728 | default: |
| 2729 | free(content); |
| 2730 | ret = LTTNG_ERR_INVALID; |
| 2731 | goto end; |
| 2732 | } |
| 2733 | free(content); |
| 2734 | } |
| 2735 | switch (status) { |
| 2736 | case LTTNG_PROCESS_ATTR_TRACKER_HANDLE_STATUS_OK: |
| 2737 | continue; |
| 2738 | case LTTNG_PROCESS_ATTR_TRACKER_HANDLE_STATUS_INVALID: |
| 2739 | ret = LTTNG_ERR_INVALID; |
| 2740 | break; |
| 2741 | case LTTNG_PROCESS_ATTR_TRACKER_HANDLE_STATUS_EXISTS: |
| 2742 | ret = LTTNG_ERR_PROCESS_ATTR_EXISTS; |
| 2743 | break; |
| 2744 | case LTTNG_PROCESS_ATTR_TRACKER_HANDLE_STATUS_MISSING: |
| 2745 | ret = LTTNG_ERR_PROCESS_ATTR_MISSING; |
| 2746 | break; |
| 2747 | case LTTNG_PROCESS_ATTR_TRACKER_HANDLE_STATUS_ERROR: |
| 2748 | case LTTNG_PROCESS_ATTR_TRACKER_HANDLE_STATUS_COMMUNICATION_ERROR: |
| 2749 | default: |
| 2750 | ret = LTTNG_ERR_UNK; |
| 2751 | goto end; |
| 2752 | } |
| 2753 | } |
| 2754 | node = id_target_node; |
| 2755 | } |
| 2756 | |
| 2757 | end: |
| 2758 | lttng_process_attr_tracker_handle_destroy(tracker_handle); |
| 2759 | return ret; |
| 2760 | } |
| 2761 | |
| 2762 | static int process_domain_node(xmlNodePtr domain_node, const char *session_name) |
| 2763 | { |
| 2764 | int ret; |
| 2765 | struct lttng_domain domain {}; |
| 2766 | struct lttng_handle *handle = nullptr; |
| 2767 | struct lttng_channel *channel = nullptr; |
| 2768 | xmlNodePtr channels_node = nullptr; |
| 2769 | xmlNodePtr trackers_node = nullptr; |
| 2770 | xmlNodePtr pid_tracker_node = nullptr; |
| 2771 | xmlNodePtr vpid_tracker_node = nullptr; |
| 2772 | xmlNodePtr uid_tracker_node = nullptr; |
| 2773 | xmlNodePtr vuid_tracker_node = nullptr; |
| 2774 | xmlNodePtr gid_tracker_node = nullptr; |
| 2775 | xmlNodePtr vgid_tracker_node = nullptr; |
| 2776 | xmlNodePtr node; |
| 2777 | |
| 2778 | LTTNG_ASSERT(session_name); |
| 2779 | |
| 2780 | ret = init_domain(domain_node, &domain); |
| 2781 | if (ret) { |
| 2782 | goto end; |
| 2783 | } |
| 2784 | |
| 2785 | handle = lttng_create_handle(session_name, &domain); |
| 2786 | if (!handle) { |
| 2787 | ret = -LTTNG_ERR_NOMEM; |
| 2788 | goto end; |
| 2789 | } |
| 2790 | |
| 2791 | /* get the channels node */ |
| 2792 | for (node = xmlFirstElementChild(domain_node); node; node = xmlNextElementSibling(node)) { |
| 2793 | if (!strcmp((const char *) node->name, config_element_channels)) { |
| 2794 | channels_node = node; |
| 2795 | break; |
| 2796 | } |
| 2797 | } |
| 2798 | |
| 2799 | if (!channels_node) { |
| 2800 | goto end; |
| 2801 | } |
| 2802 | |
| 2803 | /* create all channels */ |
| 2804 | for (node = xmlFirstElementChild(channels_node); node; node = xmlNextElementSibling(node)) { |
| 2805 | const enum lttng_domain_type original_domain = domain.type; |
| 2806 | xmlNodePtr contexts_node = nullptr; |
| 2807 | xmlNodePtr events_node = nullptr; |
| 2808 | xmlNodePtr channel_attr_node; |
| 2809 | |
| 2810 | /* |
| 2811 | * Channels of the "agent" types cannot be created directly. |
| 2812 | * They are meant to be created implicitly through the |
| 2813 | * activation of events in their domain. However, a user |
| 2814 | * can override the default channel configuration attributes |
| 2815 | * by creating the underlying UST channel _before_ enabling |
| 2816 | * an agent domain event. |
| 2817 | * |
| 2818 | * Hence, the channel's type is substituted before the creation |
| 2819 | * and restored by the time the events are created. |
| 2820 | */ |
| 2821 | switch (domain.type) { |
| 2822 | case LTTNG_DOMAIN_JUL: |
| 2823 | case LTTNG_DOMAIN_LOG4J: |
| 2824 | case LTTNG_DOMAIN_PYTHON: |
| 2825 | domain.type = LTTNG_DOMAIN_UST; |
| 2826 | default: |
| 2827 | break; |
| 2828 | } |
| 2829 | |
| 2830 | channel = lttng_channel_create(&domain); |
| 2831 | if (!channel) { |
| 2832 | ret = -1; |
| 2833 | goto end; |
| 2834 | } |
| 2835 | |
| 2836 | for (channel_attr_node = xmlFirstElementChild(node); channel_attr_node; |
| 2837 | channel_attr_node = xmlNextElementSibling(channel_attr_node)) { |
| 2838 | ret = process_channel_attr_node( |
| 2839 | channel_attr_node, channel, &contexts_node, &events_node); |
| 2840 | if (ret) { |
| 2841 | goto end; |
| 2842 | } |
| 2843 | } |
| 2844 | |
| 2845 | ret = lttng_enable_channel(handle, channel); |
| 2846 | if (ret < 0) { |
| 2847 | goto end; |
| 2848 | } |
| 2849 | |
| 2850 | /* Restore the original channel domain. */ |
| 2851 | domain.type = original_domain; |
| 2852 | |
| 2853 | ret = process_events_node(events_node, handle, channel->name); |
| 2854 | if (ret) { |
| 2855 | goto end; |
| 2856 | } |
| 2857 | |
| 2858 | ret = process_contexts_node(contexts_node, handle, channel->name); |
| 2859 | if (ret) { |
| 2860 | goto end; |
| 2861 | } |
| 2862 | |
| 2863 | lttng_channel_destroy(channel); |
| 2864 | } |
| 2865 | channel = nullptr; |
| 2866 | |
| 2867 | /* get the trackers node */ |
| 2868 | for (node = xmlFirstElementChild(domain_node); node; node = xmlNextElementSibling(node)) { |
| 2869 | if (!strcmp((const char *) node->name, config_element_process_attr_trackers) || |
| 2870 | !strcmp((const char *) node->name, config_element_trackers_legacy)) { |
| 2871 | if (trackers_node) { |
| 2872 | ERR("Only one instance of `%s` or `%s` is allowed in a session configuration", |
| 2873 | config_element_process_attr_trackers, |
| 2874 | config_element_trackers_legacy); |
| 2875 | ret = -1; |
| 2876 | goto end; |
| 2877 | } |
| 2878 | trackers_node = node; |
| 2879 | break; |
| 2880 | } |
| 2881 | } |
| 2882 | |
| 2883 | if (!trackers_node) { |
| 2884 | goto end; |
| 2885 | } |
| 2886 | |
| 2887 | for (node = xmlFirstElementChild(trackers_node); node; node = xmlNextElementSibling(node)) { |
| 2888 | if (!strcmp((const char *) node->name, config_element_process_attr_tracker_pid)) { |
| 2889 | pid_tracker_node = node; |
| 2890 | ret = process_id_tracker_node( |
| 2891 | pid_tracker_node, handle, LTTNG_PROCESS_ATTR_PROCESS_ID); |
| 2892 | if (ret) { |
| 2893 | goto end; |
| 2894 | } |
| 2895 | } |
| 2896 | if (!strcmp((const char *) node->name, config_element_process_attr_tracker_vpid)) { |
| 2897 | vpid_tracker_node = node; |
| 2898 | ret = process_id_tracker_node( |
| 2899 | vpid_tracker_node, handle, LTTNG_PROCESS_ATTR_VIRTUAL_PROCESS_ID); |
| 2900 | if (ret) { |
| 2901 | goto end; |
| 2902 | } |
| 2903 | } |
| 2904 | if (!strcmp((const char *) node->name, config_element_process_attr_tracker_uid)) { |
| 2905 | uid_tracker_node = node; |
| 2906 | ret = process_id_tracker_node( |
| 2907 | uid_tracker_node, handle, LTTNG_PROCESS_ATTR_USER_ID); |
| 2908 | if (ret) { |
| 2909 | goto end; |
| 2910 | } |
| 2911 | } |
| 2912 | if (!strcmp((const char *) node->name, config_element_process_attr_tracker_vuid)) { |
| 2913 | vuid_tracker_node = node; |
| 2914 | ret = process_id_tracker_node( |
| 2915 | vuid_tracker_node, handle, LTTNG_PROCESS_ATTR_VIRTUAL_USER_ID); |
| 2916 | if (ret) { |
| 2917 | goto end; |
| 2918 | } |
| 2919 | } |
| 2920 | if (!strcmp((const char *) node->name, config_element_process_attr_tracker_gid)) { |
| 2921 | gid_tracker_node = node; |
| 2922 | ret = process_id_tracker_node( |
| 2923 | gid_tracker_node, handle, LTTNG_PROCESS_ATTR_GROUP_ID); |
| 2924 | if (ret) { |
| 2925 | goto end; |
| 2926 | } |
| 2927 | } |
| 2928 | if (!strcmp((const char *) node->name, config_element_process_attr_tracker_vgid)) { |
| 2929 | vgid_tracker_node = node; |
| 2930 | ret = process_id_tracker_node( |
| 2931 | vgid_tracker_node, handle, LTTNG_PROCESS_ATTR_VIRTUAL_GROUP_ID); |
| 2932 | if (ret) { |
| 2933 | goto end; |
| 2934 | } |
| 2935 | } |
| 2936 | if (!strcmp((const char *) node->name, config_element_pid_tracker_legacy)) { |
| 2937 | ret = process_legacy_pid_tracker_node(node, handle); |
| 2938 | if (ret) { |
| 2939 | goto end; |
| 2940 | } |
| 2941 | } |
| 2942 | } |
| 2943 | |
| 2944 | end: |
| 2945 | lttng_channel_destroy(channel); |
| 2946 | lttng_destroy_handle(handle); |
| 2947 | return ret; |
| 2948 | } |
| 2949 | |
| 2950 | static int add_periodic_rotation(const char *name, uint64_t time_us) |
| 2951 | { |
| 2952 | int ret; |
| 2953 | enum lttng_rotation_status status; |
| 2954 | struct lttng_rotation_schedule *periodic = lttng_rotation_schedule_periodic_create(); |
| 2955 | |
| 2956 | if (!periodic) { |
| 2957 | ret = -LTTNG_ERR_NOMEM; |
| 2958 | goto error; |
| 2959 | } |
| 2960 | |
| 2961 | status = lttng_rotation_schedule_periodic_set_period(periodic, time_us); |
| 2962 | if (status != LTTNG_ROTATION_STATUS_OK) { |
| 2963 | ret = -LTTNG_ERR_INVALID; |
| 2964 | goto error; |
| 2965 | } |
| 2966 | |
| 2967 | status = lttng_session_add_rotation_schedule(name, periodic); |
| 2968 | switch (status) { |
| 2969 | case LTTNG_ROTATION_STATUS_OK: |
| 2970 | ret = 0; |
| 2971 | break; |
| 2972 | case LTTNG_ROTATION_STATUS_SCHEDULE_ALREADY_SET: |
| 2973 | case LTTNG_ROTATION_STATUS_INVALID: |
| 2974 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; |
| 2975 | break; |
| 2976 | default: |
| 2977 | ret = -LTTNG_ERR_UNK; |
| 2978 | break; |
| 2979 | } |
| 2980 | error: |
| 2981 | lttng_rotation_schedule_destroy(periodic); |
| 2982 | return ret; |
| 2983 | } |
| 2984 | |
| 2985 | static int add_size_rotation(const char *name, uint64_t size_bytes) |
| 2986 | { |
| 2987 | int ret; |
| 2988 | enum lttng_rotation_status status; |
| 2989 | struct lttng_rotation_schedule *size = lttng_rotation_schedule_size_threshold_create(); |
| 2990 | |
| 2991 | if (!size) { |
| 2992 | ret = -LTTNG_ERR_NOMEM; |
| 2993 | goto error; |
| 2994 | } |
| 2995 | |
| 2996 | status = lttng_rotation_schedule_size_threshold_set_threshold(size, size_bytes); |
| 2997 | if (status != LTTNG_ROTATION_STATUS_OK) { |
| 2998 | ret = -LTTNG_ERR_INVALID; |
| 2999 | goto error; |
| 3000 | } |
| 3001 | |
| 3002 | status = lttng_session_add_rotation_schedule(name, size); |
| 3003 | switch (status) { |
| 3004 | case LTTNG_ROTATION_STATUS_OK: |
| 3005 | ret = 0; |
| 3006 | break; |
| 3007 | case LTTNG_ROTATION_STATUS_SCHEDULE_ALREADY_SET: |
| 3008 | case LTTNG_ROTATION_STATUS_INVALID: |
| 3009 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; |
| 3010 | break; |
| 3011 | default: |
| 3012 | ret = -LTTNG_ERR_UNK; |
| 3013 | break; |
| 3014 | } |
| 3015 | error: |
| 3016 | lttng_rotation_schedule_destroy(size); |
| 3017 | return ret; |
| 3018 | } |
| 3019 | |
| 3020 | static int process_session_rotation_schedules_node(xmlNodePtr schedules_node, |
| 3021 | uint64_t *rotation_timer_interval, |
| 3022 | uint64_t *rotation_size) |
| 3023 | { |
| 3024 | int ret = 0; |
| 3025 | xmlNodePtr child; |
| 3026 | |
| 3027 | for (child = xmlFirstElementChild(schedules_node); child; |
| 3028 | child = xmlNextElementSibling(child)) { |
| 3029 | if (!strcmp((const char *) child->name, |
| 3030 | config_element_rotation_schedule_periodic)) { |
| 3031 | xmlChar *content; |
| 3032 | xmlNodePtr time_us_node; |
| 3033 | |
| 3034 | /* periodic rotation schedule */ |
| 3035 | time_us_node = xmlFirstElementChild(child); |
| 3036 | if (!time_us_node || |
| 3037 | strcmp((const char *) time_us_node->name, |
| 3038 | config_element_rotation_schedule_periodic_time_us) != 0) { |
| 3039 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; |
| 3040 | goto end; |
| 3041 | } |
| 3042 | |
| 3043 | /* time_us child */ |
| 3044 | content = xmlNodeGetContent(time_us_node); |
| 3045 | if (!content) { |
| 3046 | ret = -LTTNG_ERR_NOMEM; |
| 3047 | goto end; |
| 3048 | } |
| 3049 | ret = parse_uint(content, rotation_timer_interval); |
| 3050 | free(content); |
| 3051 | if (ret) { |
| 3052 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; |
| 3053 | goto end; |
| 3054 | } |
| 3055 | } else if (!strcmp((const char *) child->name, |
| 3056 | config_element_rotation_schedule_size_threshold)) { |
| 3057 | xmlChar *content; |
| 3058 | xmlNodePtr bytes_node; |
| 3059 | |
| 3060 | /* size_threshold rotation schedule */ |
| 3061 | bytes_node = xmlFirstElementChild(child); |
| 3062 | if (!bytes_node || |
| 3063 | strcmp((const char *) bytes_node->name, |
| 3064 | config_element_rotation_schedule_size_threshold_bytes) != 0) { |
| 3065 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; |
| 3066 | goto end; |
| 3067 | } |
| 3068 | |
| 3069 | /* bytes child */ |
| 3070 | content = xmlNodeGetContent(bytes_node); |
| 3071 | if (!content) { |
| 3072 | ret = -LTTNG_ERR_NOMEM; |
| 3073 | goto end; |
| 3074 | } |
| 3075 | ret = parse_uint(content, rotation_size); |
| 3076 | free(content); |
| 3077 | if (ret) { |
| 3078 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; |
| 3079 | goto end; |
| 3080 | } |
| 3081 | } |
| 3082 | } |
| 3083 | |
| 3084 | end: |
| 3085 | return ret; |
| 3086 | } |
| 3087 | |
| 3088 | static int process_session_node(xmlNodePtr session_node, |
| 3089 | const char *session_name, |
| 3090 | int overwrite, |
| 3091 | const struct config_load_session_override_attr *overrides) |
| 3092 | { |
| 3093 | int ret, started = -1, snapshot_mode = -1; |
| 3094 | uint64_t live_timer_interval = UINT64_MAX, rotation_timer_interval = 0, rotation_size = 0; |
| 3095 | xmlChar *name = nullptr; |
| 3096 | xmlChar *shm_path = nullptr; |
| 3097 | xmlNodePtr domains_node = nullptr; |
| 3098 | xmlNodePtr output_node = nullptr; |
| 3099 | xmlNodePtr node; |
| 3100 | xmlNodePtr attributes_child; |
| 3101 | struct lttng_domain *kernel_domain = nullptr; |
| 3102 | struct lttng_domain *ust_domain = nullptr; |
| 3103 | struct lttng_domain *jul_domain = nullptr; |
| 3104 | struct lttng_domain *log4j_domain = nullptr; |
| 3105 | struct lttng_domain *python_domain = nullptr; |
| 3106 | |
| 3107 | for (node = xmlFirstElementChild(session_node); node; node = xmlNextElementSibling(node)) { |
| 3108 | if (!name && !strcmp((const char *) node->name, config_element_name)) { |
| 3109 | /* name */ |
| 3110 | xmlChar *node_content = xmlNodeGetContent(node); |
| 3111 | if (!node_content) { |
| 3112 | ret = -LTTNG_ERR_NOMEM; |
| 3113 | goto error; |
| 3114 | } |
| 3115 | |
| 3116 | name = node_content; |
| 3117 | } else if (!domains_node && |
| 3118 | !strcmp((const char *) node->name, config_element_domains)) { |
| 3119 | /* domains */ |
| 3120 | domains_node = node; |
| 3121 | } else if (started == -1 && |
| 3122 | !strcmp((const char *) node->name, config_element_started)) { |
| 3123 | /* started */ |
| 3124 | xmlChar *node_content = xmlNodeGetContent(node); |
| 3125 | if (!node_content) { |
| 3126 | ret = -LTTNG_ERR_NOMEM; |
| 3127 | goto error; |
| 3128 | } |
| 3129 | |
| 3130 | ret = parse_bool(node_content, &started); |
| 3131 | free(node_content); |
| 3132 | if (ret) { |
| 3133 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; |
| 3134 | goto error; |
| 3135 | } |
| 3136 | } else if (!output_node && |
| 3137 | !strcmp((const char *) node->name, config_element_output)) { |
| 3138 | /* output */ |
| 3139 | output_node = node; |
| 3140 | } else if (!shm_path && |
| 3141 | !strcmp((const char *) node->name, config_element_shared_memory_path)) { |
| 3142 | /* shared memory path */ |
| 3143 | xmlChar *node_content = xmlNodeGetContent(node); |
| 3144 | if (!node_content) { |
| 3145 | ret = -LTTNG_ERR_NOMEM; |
| 3146 | goto error; |
| 3147 | } |
| 3148 | |
| 3149 | shm_path = node_content; |
| 3150 | } else { |
| 3151 | /* |
| 3152 | * attributes, snapshot_mode, live_timer_interval, rotation_size, |
| 3153 | * rotation_timer_interval. |
| 3154 | */ |
| 3155 | for (attributes_child = xmlFirstElementChild(node); attributes_child; |
| 3156 | attributes_child = xmlNextElementSibling(attributes_child)) { |
| 3157 | if (!strcmp((const char *) attributes_child->name, |
| 3158 | config_element_snapshot_mode)) { |
| 3159 | /* snapshot_mode */ |
| 3160 | xmlChar *snapshot_mode_content = |
| 3161 | xmlNodeGetContent(attributes_child); |
| 3162 | if (!snapshot_mode_content) { |
| 3163 | ret = -LTTNG_ERR_NOMEM; |
| 3164 | goto error; |
| 3165 | } |
| 3166 | |
| 3167 | ret = parse_bool(snapshot_mode_content, &snapshot_mode); |
| 3168 | free(snapshot_mode_content); |
| 3169 | if (ret) { |
| 3170 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; |
| 3171 | goto error; |
| 3172 | } |
| 3173 | } else if (!strcmp((const char *) attributes_child->name, |
| 3174 | config_element_live_timer_interval)) { |
| 3175 | /* live_timer_interval */ |
| 3176 | xmlChar *timer_interval_content = |
| 3177 | xmlNodeGetContent(attributes_child); |
| 3178 | if (!timer_interval_content) { |
| 3179 | ret = -LTTNG_ERR_NOMEM; |
| 3180 | goto error; |
| 3181 | } |
| 3182 | |
| 3183 | ret = parse_uint(timer_interval_content, |
| 3184 | &live_timer_interval); |
| 3185 | free(timer_interval_content); |
| 3186 | if (ret) { |
| 3187 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; |
| 3188 | goto error; |
| 3189 | } |
| 3190 | } else if (!strcmp((const char *) attributes_child->name, |
| 3191 | config_element_rotation_schedules)) { |
| 3192 | ret = process_session_rotation_schedules_node( |
| 3193 | attributes_child, |
| 3194 | &rotation_timer_interval, |
| 3195 | &rotation_size); |
| 3196 | if (ret) { |
| 3197 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; |
| 3198 | goto error; |
| 3199 | } |
| 3200 | } |
| 3201 | } |
| 3202 | } |
| 3203 | } |
| 3204 | |
| 3205 | if (!name) { |
| 3206 | /* Mandatory attribute, as defined in the session XSD */ |
| 3207 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; |
| 3208 | goto error; |
| 3209 | } |
| 3210 | |
| 3211 | if (session_name && strcmp((char *) name, session_name) != 0) { |
| 3212 | /* This is not the session we are looking for */ |
| 3213 | ret = -LTTNG_ERR_NO_SESSION; |
| 3214 | goto error; |
| 3215 | } |
| 3216 | |
| 3217 | /* Init domains to create the session handles */ |
| 3218 | for (node = xmlFirstElementChild(domains_node); node; node = xmlNextElementSibling(node)) { |
| 3219 | lttng_domain *domain = zmalloc<lttng_domain>(); |
| 3220 | |
| 3221 | if (!domain) { |
| 3222 | ret = -LTTNG_ERR_NOMEM; |
| 3223 | goto error; |
| 3224 | } |
| 3225 | |
| 3226 | ret = init_domain(node, domain); |
| 3227 | if (ret) { |
| 3228 | goto domain_init_error; |
| 3229 | } |
| 3230 | |
| 3231 | switch (domain->type) { |
| 3232 | case LTTNG_DOMAIN_KERNEL: |
| 3233 | if (kernel_domain) { |
| 3234 | /* Same domain seen twice, invalid! */ |
| 3235 | goto domain_init_error; |
| 3236 | } |
| 3237 | kernel_domain = domain; |
| 3238 | break; |
| 3239 | case LTTNG_DOMAIN_UST: |
| 3240 | if (ust_domain) { |
| 3241 | /* Same domain seen twice, invalid! */ |
| 3242 | goto domain_init_error; |
| 3243 | } |
| 3244 | ust_domain = domain; |
| 3245 | break; |
| 3246 | case LTTNG_DOMAIN_JUL: |
| 3247 | if (jul_domain) { |
| 3248 | /* Same domain seen twice, invalid! */ |
| 3249 | goto domain_init_error; |
| 3250 | } |
| 3251 | jul_domain = domain; |
| 3252 | break; |
| 3253 | case LTTNG_DOMAIN_LOG4J: |
| 3254 | if (log4j_domain) { |
| 3255 | /* Same domain seen twice, invalid! */ |
| 3256 | goto domain_init_error; |
| 3257 | } |
| 3258 | log4j_domain = domain; |
| 3259 | break; |
| 3260 | case LTTNG_DOMAIN_PYTHON: |
| 3261 | if (python_domain) { |
| 3262 | /* Same domain seen twice, invalid! */ |
| 3263 | goto domain_init_error; |
| 3264 | } |
| 3265 | python_domain = domain; |
| 3266 | break; |
| 3267 | default: |
| 3268 | WARN("Invalid domain type"); |
| 3269 | goto domain_init_error; |
| 3270 | } |
| 3271 | continue; |
| 3272 | domain_init_error: |
| 3273 | free(domain); |
| 3274 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; |
| 3275 | goto error; |
| 3276 | } |
| 3277 | |
| 3278 | /* Apply overrides */ |
| 3279 | if (overrides) { |
| 3280 | if (overrides->session_name) { |
| 3281 | xmlChar *name_override = xmlStrdup(BAD_CAST(overrides->session_name)); |
| 3282 | if (!name_override) { |
| 3283 | ret = -LTTNG_ERR_NOMEM; |
| 3284 | goto error; |
| 3285 | } |
| 3286 | |
| 3287 | /* Overrides the session name to the provided name */ |
| 3288 | xmlFree(name); |
| 3289 | name = name_override; |
| 3290 | } |
| 3291 | } |
| 3292 | |
| 3293 | if (overwrite) { |
| 3294 | /* Destroy session if it exists */ |
| 3295 | ret = lttng_destroy_session((const char *) name); |
| 3296 | if (ret && ret != -LTTNG_ERR_SESS_NOT_FOUND) { |
| 3297 | ERR("Failed to destroy existing session."); |
| 3298 | goto error; |
| 3299 | } |
| 3300 | } |
| 3301 | |
| 3302 | /* Create session type depending on output type */ |
| 3303 | if (snapshot_mode && snapshot_mode != -1) { |
| 3304 | ret = create_snapshot_session((const char *) name, output_node, overrides); |
| 3305 | } else if (live_timer_interval && live_timer_interval != UINT64_MAX) { |
| 3306 | ret = create_session( |
| 3307 | (const char *) name, output_node, live_timer_interval, overrides); |
| 3308 | } else { |
| 3309 | /* regular session */ |
| 3310 | ret = create_session((const char *) name, output_node, UINT64_MAX, overrides); |
| 3311 | } |
| 3312 | if (ret) { |
| 3313 | goto error; |
| 3314 | } |
| 3315 | |
| 3316 | if (shm_path) { |
| 3317 | ret = lttng_set_session_shm_path((const char *) name, (const char *) shm_path); |
| 3318 | if (ret) { |
| 3319 | goto error; |
| 3320 | } |
| 3321 | } |
| 3322 | |
| 3323 | for (node = xmlFirstElementChild(domains_node); node; node = xmlNextElementSibling(node)) { |
| 3324 | ret = process_domain_node(node, (const char *) name); |
| 3325 | if (ret) { |
| 3326 | goto end; |
| 3327 | } |
| 3328 | } |
| 3329 | |
| 3330 | if (rotation_timer_interval) { |
| 3331 | ret = add_periodic_rotation((const char *) name, rotation_timer_interval); |
| 3332 | if (ret < 0) { |
| 3333 | goto error; |
| 3334 | } |
| 3335 | } |
| 3336 | if (rotation_size) { |
| 3337 | ret = add_size_rotation((const char *) name, rotation_size); |
| 3338 | if (ret < 0) { |
| 3339 | goto error; |
| 3340 | } |
| 3341 | } |
| 3342 | |
| 3343 | if (started) { |
| 3344 | ret = lttng_start_tracing((const char *) name); |
| 3345 | if (ret) { |
| 3346 | goto end; |
| 3347 | } |
| 3348 | } |
| 3349 | |
| 3350 | end: |
| 3351 | if (ret < 0) { |
| 3352 | ERR("Failed to load session %s: %s", (const char *) name, lttng_strerror(ret)); |
| 3353 | lttng_destroy_session((const char *) name); |
| 3354 | } |
| 3355 | |
| 3356 | error: |
| 3357 | free(kernel_domain); |
| 3358 | free(ust_domain); |
| 3359 | free(jul_domain); |
| 3360 | free(log4j_domain); |
| 3361 | free(python_domain); |
| 3362 | xmlFree(name); |
| 3363 | xmlFree(shm_path); |
| 3364 | return ret; |
| 3365 | } |
| 3366 | |
| 3367 | /* |
| 3368 | * Return 1 if the given path is readable by the current UID or 0 if not. |
| 3369 | * Return -1 if the path is EPERM. |
| 3370 | */ |
| 3371 | static int validate_file_read_creds(const char *path) |
| 3372 | { |
| 3373 | int ret; |
| 3374 | |
| 3375 | LTTNG_ASSERT(path); |
| 3376 | |
| 3377 | /* Can we read the file. */ |
| 3378 | ret = access(path, R_OK); |
| 3379 | if (!ret) { |
| 3380 | goto valid; |
| 3381 | } |
| 3382 | if (errno == EACCES) { |
| 3383 | return -1; |
| 3384 | } else { |
| 3385 | /* Invalid. */ |
| 3386 | return 0; |
| 3387 | } |
| 3388 | valid: |
| 3389 | return 1; |
| 3390 | } |
| 3391 | |
| 3392 | static int load_session_from_file(const char *path, |
| 3393 | const char *session_name, |
| 3394 | struct session_config_validation_ctx *validation_ctx, |
| 3395 | int overwrite, |
| 3396 | const struct config_load_session_override_attr *overrides) |
| 3397 | { |
| 3398 | int ret, session_found = !session_name; |
| 3399 | xmlDocPtr doc = nullptr; |
| 3400 | xmlNodePtr sessions_node; |
| 3401 | xmlNodePtr session_node; |
| 3402 | |
| 3403 | LTTNG_ASSERT(path); |
| 3404 | LTTNG_ASSERT(validation_ctx); |
| 3405 | |
| 3406 | ret = validate_file_read_creds(path); |
| 3407 | if (ret != 1) { |
| 3408 | if (ret == -1) { |
| 3409 | ret = -LTTNG_ERR_EPERM; |
| 3410 | } else { |
| 3411 | ret = -LTTNG_ERR_LOAD_SESSION_NOENT; |
| 3412 | } |
| 3413 | goto end; |
| 3414 | } |
| 3415 | |
| 3416 | doc = xmlParseFile(path); |
| 3417 | if (!doc) { |
| 3418 | ret = -LTTNG_ERR_LOAD_IO_FAIL; |
| 3419 | goto end; |
| 3420 | } |
| 3421 | |
| 3422 | ret = xmlSchemaValidateDoc(validation_ctx->schema_validation_ctx, doc); |
| 3423 | if (ret) { |
| 3424 | ERR("Session configuration file validation failed"); |
| 3425 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; |
| 3426 | goto end; |
| 3427 | } |
| 3428 | |
| 3429 | sessions_node = xmlDocGetRootElement(doc); |
| 3430 | if (!sessions_node) { |
| 3431 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; |
| 3432 | goto end; |
| 3433 | } |
| 3434 | |
| 3435 | for (session_node = xmlFirstElementChild(sessions_node); session_node; |
| 3436 | session_node = xmlNextElementSibling(session_node)) { |
| 3437 | ret = process_session_node(session_node, session_name, overwrite, overrides); |
| 3438 | if (!session_name && ret) { |
| 3439 | /* Loading error occurred. */ |
| 3440 | goto end; |
| 3441 | } else if (session_name) { |
| 3442 | if (ret == 0) { |
| 3443 | /* Target session found and loaded */ |
| 3444 | session_found = 1; |
| 3445 | break; |
| 3446 | } else if (ret == -LTTNG_ERR_NO_SESSION) { |
| 3447 | /* |
| 3448 | * Ignore this error, we are looking for a |
| 3449 | * specific session. |
| 3450 | */ |
| 3451 | ret = 0; |
| 3452 | } else { |
| 3453 | /* Loading error occurred. */ |
| 3454 | goto end; |
| 3455 | } |
| 3456 | } |
| 3457 | } |
| 3458 | end: |
| 3459 | xmlFreeDoc(doc); |
| 3460 | if (!ret) { |
| 3461 | ret = session_found ? 0 : -LTTNG_ERR_LOAD_SESSION_NOENT; |
| 3462 | } |
| 3463 | return ret; |
| 3464 | } |
| 3465 | |
| 3466 | static int load_session_from_path(const char *path, |
| 3467 | const char *session_name, |
| 3468 | struct session_config_validation_ctx *validation_ctx, |
| 3469 | int overwrite, |
| 3470 | const struct config_load_session_override_attr *overrides) |
| 3471 | { |
| 3472 | int ret, session_found = !session_name; |
| 3473 | DIR *directory = nullptr; |
| 3474 | struct lttng_dynamic_buffer file_path; |
| 3475 | size_t path_len; |
| 3476 | |
| 3477 | LTTNG_ASSERT(path); |
| 3478 | LTTNG_ASSERT(validation_ctx); |
| 3479 | path_len = strlen(path); |
| 3480 | lttng_dynamic_buffer_init(&file_path); |
| 3481 | if (path_len >= LTTNG_PATH_MAX) { |
| 3482 | ERR("Session configuration load path \"%s\" length (%zu) exceeds the maximal length allowed (%d)", |
| 3483 | path, |
| 3484 | path_len, |
| 3485 | LTTNG_PATH_MAX); |
| 3486 | ret = -LTTNG_ERR_INVALID; |
| 3487 | goto end; |
| 3488 | } |
| 3489 | |
| 3490 | directory = opendir(path); |
| 3491 | if (!directory) { |
| 3492 | switch (errno) { |
| 3493 | case ENOTDIR: |
| 3494 | /* Try the file loading. */ |
| 3495 | break; |
| 3496 | case ENOENT: |
| 3497 | ret = -LTTNG_ERR_LOAD_SESSION_NOENT; |
| 3498 | goto end; |
| 3499 | default: |
| 3500 | ret = -LTTNG_ERR_LOAD_IO_FAIL; |
| 3501 | goto end; |
| 3502 | } |
| 3503 | } |
| 3504 | if (directory) { |
| 3505 | size_t file_path_root_len; |
| 3506 | |
| 3507 | ret = lttng_dynamic_buffer_set_capacity(&file_path, LTTNG_PATH_MAX); |
| 3508 | if (ret) { |
| 3509 | ret = -LTTNG_ERR_NOMEM; |
| 3510 | goto end; |
| 3511 | } |
| 3512 | |
| 3513 | ret = lttng_dynamic_buffer_append(&file_path, path, path_len); |
| 3514 | if (ret) { |
| 3515 | ret = -LTTNG_ERR_NOMEM; |
| 3516 | goto end; |
| 3517 | } |
| 3518 | |
| 3519 | if (file_path.data[file_path.size - 1] != '/') { |
| 3520 | ret = lttng_dynamic_buffer_append(&file_path, "/", 1); |
| 3521 | if (ret) { |
| 3522 | ret = -LTTNG_ERR_NOMEM; |
| 3523 | goto end; |
| 3524 | } |
| 3525 | } |
| 3526 | file_path_root_len = file_path.size; |
| 3527 | |
| 3528 | /* Search for *.lttng files */ |
| 3529 | for (;;) { |
| 3530 | size_t file_name_len; |
| 3531 | struct dirent *result; |
| 3532 | |
| 3533 | /* |
| 3534 | * When the end of the directory stream is reached, NULL |
| 3535 | * is returned and errno is kept unchanged. When an |
| 3536 | * error occurs, NULL is returned and errno is set |
| 3537 | * accordingly. To distinguish between the two, set |
| 3538 | * errno to zero before calling readdir(). |
| 3539 | * |
| 3540 | * On success, readdir() returns a pointer to a dirent |
| 3541 | * structure. This structure may be statically |
| 3542 | * allocated, do not attempt to free(3) it. |
| 3543 | */ |
| 3544 | errno = 0; |
| 3545 | result = readdir(directory); |
| 3546 | |
| 3547 | /* Reached end of dir stream or error out. */ |
| 3548 | if (!result) { |
| 3549 | if (errno) { |
| 3550 | PERROR("Failed to enumerate the contents of path \"%s\" while loading session, readdir returned", |
| 3551 | path); |
| 3552 | ret = -LTTNG_ERR_LOAD_IO_FAIL; |
| 3553 | goto end; |
| 3554 | } |
| 3555 | break; |
| 3556 | } |
| 3557 | |
| 3558 | file_name_len = strlen(result->d_name); |
| 3559 | |
| 3560 | if (file_name_len <= sizeof(DEFAULT_SESSION_CONFIG_FILE_EXTENSION)) { |
| 3561 | continue; |
| 3562 | } |
| 3563 | |
| 3564 | if (file_path.size + file_name_len >= LTTNG_PATH_MAX) { |
| 3565 | WARN("Ignoring file \"%s\" since the path's length (%zu) would exceed the maximal permitted size (%d)", |
| 3566 | result->d_name, |
| 3567 | /* +1 to account for NULL terminator. */ |
| 3568 | file_path.size + file_name_len + 1, |
| 3569 | LTTNG_PATH_MAX); |
| 3570 | continue; |
| 3571 | } |
| 3572 | |
| 3573 | /* Does the file end with .lttng? */ |
| 3574 | if (strcmp(DEFAULT_SESSION_CONFIG_FILE_EXTENSION, |
| 3575 | result->d_name + file_name_len - |
| 3576 | sizeof(DEFAULT_SESSION_CONFIG_FILE_EXTENSION) + 1) != |
| 3577 | 0) { |
| 3578 | continue; |
| 3579 | } |
| 3580 | |
| 3581 | ret = lttng_dynamic_buffer_append( |
| 3582 | &file_path, result->d_name, file_name_len + 1); |
| 3583 | if (ret) { |
| 3584 | ret = -LTTNG_ERR_NOMEM; |
| 3585 | goto end; |
| 3586 | } |
| 3587 | |
| 3588 | ret = load_session_from_file( |
| 3589 | file_path.data, session_name, validation_ctx, overwrite, overrides); |
| 3590 | if (session_name && (!ret || ret != -LTTNG_ERR_LOAD_SESSION_NOENT)) { |
| 3591 | session_found = 1; |
| 3592 | break; |
| 3593 | } |
| 3594 | if (ret && ret != -LTTNG_ERR_LOAD_SESSION_NOENT) { |
| 3595 | goto end; |
| 3596 | } |
| 3597 | /* |
| 3598 | * Reset the buffer's size to the location of the |
| 3599 | * path's trailing '/'. |
| 3600 | */ |
| 3601 | ret = lttng_dynamic_buffer_set_size(&file_path, file_path_root_len); |
| 3602 | if (ret) { |
| 3603 | ret = -LTTNG_ERR_UNK; |
| 3604 | goto end; |
| 3605 | } |
| 3606 | } |
| 3607 | } else { |
| 3608 | ret = load_session_from_file( |
| 3609 | path, session_name, validation_ctx, overwrite, overrides); |
| 3610 | if (ret) { |
| 3611 | goto end; |
| 3612 | } |
| 3613 | session_found = 1; |
| 3614 | } |
| 3615 | |
| 3616 | ret = 0; |
| 3617 | end: |
| 3618 | if (directory) { |
| 3619 | if (closedir(directory)) { |
| 3620 | PERROR("closedir"); |
| 3621 | } |
| 3622 | } |
| 3623 | if (!ret && !session_found) { |
| 3624 | ret = -LTTNG_ERR_LOAD_SESSION_NOENT; |
| 3625 | } |
| 3626 | lttng_dynamic_buffer_reset(&file_path); |
| 3627 | return ret; |
| 3628 | } |
| 3629 | |
| 3630 | /* |
| 3631 | * Validate that the given path's credentials and the current process have the |
| 3632 | * same UID. If so, return 1 else return 0 if it does NOT match. |
| 3633 | */ |
| 3634 | static int validate_path_creds(const char *path) |
| 3635 | { |
| 3636 | int ret, uid = getuid(); |
| 3637 | struct stat buf; |
| 3638 | |
| 3639 | LTTNG_ASSERT(path); |
| 3640 | |
| 3641 | if (uid == 0) { |
| 3642 | goto valid; |
| 3643 | } |
| 3644 | |
| 3645 | ret = stat(path, &buf); |
| 3646 | if (ret < 0) { |
| 3647 | if (errno != ENOENT) { |
| 3648 | PERROR("stat"); |
| 3649 | } |
| 3650 | goto valid; |
| 3651 | } |
| 3652 | |
| 3653 | if (buf.st_uid != uid) { |
| 3654 | goto invalid; |
| 3655 | } |
| 3656 | |
| 3657 | valid: |
| 3658 | return 1; |
| 3659 | invalid: |
| 3660 | return 0; |
| 3661 | } |
| 3662 | |
| 3663 | int config_load_session(const char *path, |
| 3664 | const char *session_name, |
| 3665 | int overwrite, |
| 3666 | unsigned int autoload, |
| 3667 | const struct config_load_session_override_attr *overrides) |
| 3668 | { |
| 3669 | int ret; |
| 3670 | bool session_loaded = false; |
| 3671 | const char *path_ptr = nullptr; |
| 3672 | struct session_config_validation_ctx validation_ctx = {}; |
| 3673 | |
| 3674 | ret = init_session_config_validation_ctx(&validation_ctx); |
| 3675 | if (ret) { |
| 3676 | goto end; |
| 3677 | } |
| 3678 | |
| 3679 | if (!path) { |
| 3680 | const char *home_path; |
| 3681 | const char *sys_path; |
| 3682 | |
| 3683 | /* Try home path */ |
| 3684 | home_path = utils_get_home_dir(); |
| 3685 | if (home_path) { |
| 3686 | char path_buf[PATH_MAX]; |
| 3687 | |
| 3688 | /* |
| 3689 | * Try user session configuration path. Ignore error here so we can |
| 3690 | * continue loading the system wide sessions. |
| 3691 | */ |
| 3692 | if (autoload) { |
| 3693 | ret = snprintf(path_buf, |
| 3694 | sizeof(path_buf), |
| 3695 | DEFAULT_SESSION_HOME_CONFIGPATH |
| 3696 | "/" DEFAULT_SESSION_CONFIG_AUTOLOAD, |
| 3697 | home_path); |
| 3698 | if (ret < 0) { |
| 3699 | PERROR("snprintf session autoload home config path"); |
| 3700 | ret = -LTTNG_ERR_INVALID; |
| 3701 | goto end; |
| 3702 | } |
| 3703 | |
| 3704 | /* |
| 3705 | * Credentials are only validated for the autoload in order to |
| 3706 | * avoid any user session daemon to try to load kernel sessions |
| 3707 | * automatically and failing all the times. |
| 3708 | */ |
| 3709 | ret = validate_path_creds(path_buf); |
| 3710 | if (ret) { |
| 3711 | path_ptr = path_buf; |
| 3712 | } |
| 3713 | } else { |
| 3714 | ret = snprintf(path_buf, |
| 3715 | sizeof(path_buf), |
| 3716 | DEFAULT_SESSION_HOME_CONFIGPATH, |
| 3717 | home_path); |
| 3718 | if (ret < 0) { |
| 3719 | PERROR("snprintf session home config path"); |
| 3720 | ret = -LTTNG_ERR_INVALID; |
| 3721 | goto end; |
| 3722 | } |
| 3723 | path_ptr = path_buf; |
| 3724 | } |
| 3725 | if (path_ptr) { |
| 3726 | ret = load_session_from_path(path_ptr, |
| 3727 | session_name, |
| 3728 | &validation_ctx, |
| 3729 | overwrite, |
| 3730 | overrides); |
| 3731 | if (ret && ret != -LTTNG_ERR_LOAD_SESSION_NOENT) { |
| 3732 | goto end; |
| 3733 | } |
| 3734 | /* |
| 3735 | * Continue even if the session was found since we have to try |
| 3736 | * the system wide sessions. |
| 3737 | */ |
| 3738 | session_loaded = true; |
| 3739 | } |
| 3740 | } |
| 3741 | |
| 3742 | /* Reset path pointer for the system wide dir. */ |
| 3743 | path_ptr = nullptr; |
| 3744 | |
| 3745 | /* Try system wide configuration directory. */ |
| 3746 | if (autoload) { |
| 3747 | sys_path = DEFAULT_SESSION_SYSTEM_CONFIGPATH |
| 3748 | "/" DEFAULT_SESSION_CONFIG_AUTOLOAD; |
| 3749 | ret = validate_path_creds(sys_path); |
| 3750 | if (ret) { |
| 3751 | path_ptr = sys_path; |
| 3752 | } |
| 3753 | } else { |
| 3754 | sys_path = DEFAULT_SESSION_SYSTEM_CONFIGPATH; |
| 3755 | path_ptr = sys_path; |
| 3756 | } |
| 3757 | |
| 3758 | if (path_ptr) { |
| 3759 | ret = load_session_from_path( |
| 3760 | path_ptr, session_name, &validation_ctx, overwrite, overrides); |
| 3761 | if (!ret) { |
| 3762 | session_loaded = true; |
| 3763 | } |
| 3764 | } else { |
| 3765 | ret = 0; |
| 3766 | } |
| 3767 | } else { |
| 3768 | ret = access(path, F_OK); |
| 3769 | if (ret < 0) { |
| 3770 | PERROR("access"); |
| 3771 | switch (errno) { |
| 3772 | case ENOENT: |
| 3773 | ret = -LTTNG_ERR_INVALID; |
| 3774 | WARN("Session configuration path does not exist."); |
| 3775 | break; |
| 3776 | case EACCES: |
| 3777 | ret = -LTTNG_ERR_EPERM; |
| 3778 | break; |
| 3779 | default: |
| 3780 | ret = -LTTNG_ERR_UNK; |
| 3781 | break; |
| 3782 | } |
| 3783 | goto end; |
| 3784 | } |
| 3785 | |
| 3786 | ret = load_session_from_path( |
| 3787 | path, session_name, &validation_ctx, overwrite, overrides); |
| 3788 | } |
| 3789 | end: |
| 3790 | fini_session_config_validation_ctx(&validation_ctx); |
| 3791 | if (ret == -LTTNG_ERR_LOAD_SESSION_NOENT && !session_name && !path) { |
| 3792 | /* |
| 3793 | * Don't report an error if no sessions are found when called |
| 3794 | * without a session_name or a search path. |
| 3795 | */ |
| 3796 | ret = 0; |
| 3797 | } |
| 3798 | |
| 3799 | if (session_loaded && ret == -LTTNG_ERR_LOAD_SESSION_NOENT) { |
| 3800 | /* A matching session was found in one of the search paths. */ |
| 3801 | ret = 0; |
| 3802 | } |
| 3803 | return ret; |
| 3804 | } |
| 3805 | |
| 3806 | static void __attribute__((destructor)) session_config_exit() |
| 3807 | { |
| 3808 | xmlCleanupParser(); |
| 3809 | } |