| 1 | /* |
| 2 | * Copyright (C) 2014 - Jérémie Galarneau <jeremie.galarneau@efficios.com> |
| 3 | * |
| 4 | * This program is free software; you can redistribute it and/or modify it |
| 5 | * under the terms of the GNU General Public License, version 2 only, as |
| 6 | * published by the Free Software Foundation. |
| 7 | * |
| 8 | * This program is distributed in the hope that it will be useful, but WITHOUT |
| 9 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| 10 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for |
| 11 | * more details. |
| 12 | * |
| 13 | * You should have received a copy of the GNU General Public License along with |
| 14 | * this program; if not, write to the Free Software Foundation, Inc., 51 |
| 15 | * Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. |
| 16 | */ |
| 17 | |
| 18 | #define _LGPL_SOURCE |
| 19 | #include <assert.h> |
| 20 | #include <inttypes.h> |
| 21 | #include <string.h> |
| 22 | #include <urcu/uatomic.h> |
| 23 | #include <unistd.h> |
| 24 | |
| 25 | #include <common/defaults.h> |
| 26 | #include <common/error.h> |
| 27 | #include <common/config/session-config.h> |
| 28 | #include <common/utils.h> |
| 29 | #include <common/runas.h> |
| 30 | #include <lttng/save-internal.h> |
| 31 | |
| 32 | #include "kernel.h" |
| 33 | #include "save.h" |
| 34 | #include "session.h" |
| 35 | #include "lttng-syscall.h" |
| 36 | #include "trace-ust.h" |
| 37 | #include "agent.h" |
| 38 | |
| 39 | static |
| 40 | int save_kernel_channel_attributes(struct config_writer *writer, |
| 41 | struct lttng_channel_attr *attr) |
| 42 | { |
| 43 | int ret; |
| 44 | |
| 45 | ret = config_writer_write_element_string(writer, |
| 46 | config_element_overwrite_mode, |
| 47 | attr->overwrite ? config_overwrite_mode_overwrite : |
| 48 | config_overwrite_mode_discard); |
| 49 | if (ret) { |
| 50 | goto end; |
| 51 | } |
| 52 | |
| 53 | ret = config_writer_write_element_unsigned_int(writer, |
| 54 | config_element_subbuf_size, attr->subbuf_size); |
| 55 | if (ret) { |
| 56 | goto end; |
| 57 | } |
| 58 | |
| 59 | ret = config_writer_write_element_unsigned_int(writer, |
| 60 | config_element_num_subbuf, |
| 61 | attr->num_subbuf); |
| 62 | if (ret) { |
| 63 | goto end; |
| 64 | } |
| 65 | |
| 66 | ret = config_writer_write_element_unsigned_int(writer, |
| 67 | config_element_switch_timer_interval, |
| 68 | attr->switch_timer_interval); |
| 69 | if (ret) { |
| 70 | goto end; |
| 71 | } |
| 72 | |
| 73 | ret = config_writer_write_element_unsigned_int(writer, |
| 74 | config_element_read_timer_interval, |
| 75 | attr->read_timer_interval); |
| 76 | if (ret) { |
| 77 | goto end; |
| 78 | } |
| 79 | |
| 80 | ret = config_writer_write_element_string(writer, |
| 81 | config_element_output_type, |
| 82 | attr->output == LTTNG_EVENT_SPLICE ? |
| 83 | config_output_type_splice : config_output_type_mmap); |
| 84 | if (ret) { |
| 85 | goto end; |
| 86 | } |
| 87 | |
| 88 | ret = config_writer_write_element_unsigned_int(writer, |
| 89 | config_element_tracefile_size, attr->tracefile_size); |
| 90 | if (ret) { |
| 91 | goto end; |
| 92 | } |
| 93 | |
| 94 | ret = config_writer_write_element_unsigned_int(writer, |
| 95 | config_element_tracefile_count, |
| 96 | attr->tracefile_count); |
| 97 | if (ret) { |
| 98 | goto end; |
| 99 | } |
| 100 | |
| 101 | ret = config_writer_write_element_unsigned_int(writer, |
| 102 | config_element_live_timer_interval, |
| 103 | attr->live_timer_interval); |
| 104 | if (ret) { |
| 105 | goto end; |
| 106 | } |
| 107 | |
| 108 | if (attr->extended.ptr) { |
| 109 | struct lttng_channel_extended *ext = NULL; |
| 110 | |
| 111 | ext = (struct lttng_channel_extended *) attr->extended.ptr; |
| 112 | ret = config_writer_write_element_unsigned_int(writer, |
| 113 | config_element_monitor_timer_interval, |
| 114 | ext->monitor_timer_interval); |
| 115 | if (ret) { |
| 116 | goto end; |
| 117 | } |
| 118 | |
| 119 | ret = config_writer_write_element_signed_int(writer, |
| 120 | config_element_blocking_timeout, |
| 121 | ext->blocking_timeout); |
| 122 | if (ret) { |
| 123 | goto end; |
| 124 | } |
| 125 | } |
| 126 | |
| 127 | end: |
| 128 | return ret ? LTTNG_ERR_SAVE_IO_FAIL : 0; |
| 129 | } |
| 130 | |
| 131 | static |
| 132 | int save_ust_channel_attributes(struct config_writer *writer, |
| 133 | struct lttng_ust_channel_attr *attr) |
| 134 | { |
| 135 | int ret; |
| 136 | struct ltt_ust_channel *channel = NULL; |
| 137 | |
| 138 | ret = config_writer_write_element_string(writer, |
| 139 | config_element_overwrite_mode, |
| 140 | attr->overwrite ? config_overwrite_mode_overwrite : |
| 141 | config_overwrite_mode_discard); |
| 142 | if (ret) { |
| 143 | goto end; |
| 144 | } |
| 145 | |
| 146 | ret = config_writer_write_element_unsigned_int(writer, |
| 147 | config_element_subbuf_size, attr->subbuf_size); |
| 148 | if (ret) { |
| 149 | goto end; |
| 150 | } |
| 151 | |
| 152 | ret = config_writer_write_element_unsigned_int(writer, |
| 153 | config_element_num_subbuf, |
| 154 | attr->num_subbuf); |
| 155 | if (ret) { |
| 156 | goto end; |
| 157 | } |
| 158 | |
| 159 | ret = config_writer_write_element_unsigned_int(writer, |
| 160 | config_element_switch_timer_interval, |
| 161 | attr->switch_timer_interval); |
| 162 | if (ret) { |
| 163 | goto end; |
| 164 | } |
| 165 | |
| 166 | ret = config_writer_write_element_unsigned_int(writer, |
| 167 | config_element_read_timer_interval, |
| 168 | attr->read_timer_interval); |
| 169 | if (ret) { |
| 170 | goto end; |
| 171 | } |
| 172 | |
| 173 | ret = config_writer_write_element_string(writer, |
| 174 | config_element_output_type, |
| 175 | attr->output == LTTNG_UST_MMAP ? |
| 176 | config_output_type_mmap : config_output_type_splice); |
| 177 | if (ret) { |
| 178 | goto end; |
| 179 | } |
| 180 | |
| 181 | ret = config_writer_write_element_signed_int(writer, |
| 182 | config_element_blocking_timeout, |
| 183 | attr->u.s.blocking_timeout); |
| 184 | if (ret) { |
| 185 | goto end; |
| 186 | } |
| 187 | |
| 188 | /* |
| 189 | * Fetch the monitor timer which is located in the parent of |
| 190 | * lttng_ust_channel_attr |
| 191 | */ |
| 192 | channel = caa_container_of(attr, struct ltt_ust_channel, attr); |
| 193 | ret = config_writer_write_element_unsigned_int(writer, |
| 194 | config_element_monitor_timer_interval, |
| 195 | channel->monitor_timer_interval); |
| 196 | if (ret) { |
| 197 | goto end; |
| 198 | } |
| 199 | |
| 200 | end: |
| 201 | return ret ? LTTNG_ERR_SAVE_IO_FAIL : 0; |
| 202 | } |
| 203 | |
| 204 | static |
| 205 | const char *get_kernel_instrumentation_string( |
| 206 | enum lttng_kernel_instrumentation instrumentation) |
| 207 | { |
| 208 | const char *instrumentation_string; |
| 209 | |
| 210 | switch (instrumentation) { |
| 211 | case LTTNG_KERNEL_ALL: |
| 212 | instrumentation_string = config_event_type_all; |
| 213 | break; |
| 214 | case LTTNG_KERNEL_TRACEPOINT: |
| 215 | instrumentation_string = config_event_type_tracepoint; |
| 216 | break; |
| 217 | case LTTNG_KERNEL_KPROBE: |
| 218 | instrumentation_string = config_event_type_probe; |
| 219 | break; |
| 220 | case LTTNG_KERNEL_UPROBE: |
| 221 | instrumentation_string = config_event_type_userspace_probe; |
| 222 | break; |
| 223 | case LTTNG_KERNEL_FUNCTION: |
| 224 | instrumentation_string = config_event_type_function_entry; |
| 225 | break; |
| 226 | case LTTNG_KERNEL_KRETPROBE: |
| 227 | instrumentation_string = config_event_type_function; |
| 228 | break; |
| 229 | case LTTNG_KERNEL_NOOP: |
| 230 | instrumentation_string = config_event_type_noop; |
| 231 | break; |
| 232 | case LTTNG_KERNEL_SYSCALL: |
| 233 | instrumentation_string = config_event_type_syscall; |
| 234 | break; |
| 235 | default: |
| 236 | instrumentation_string = NULL; |
| 237 | } |
| 238 | |
| 239 | return instrumentation_string; |
| 240 | } |
| 241 | |
| 242 | static |
| 243 | const char *get_kernel_context_type_string( |
| 244 | enum lttng_kernel_context_type context_type) |
| 245 | { |
| 246 | const char *context_type_string; |
| 247 | |
| 248 | switch (context_type) { |
| 249 | case LTTNG_KERNEL_CONTEXT_PID: |
| 250 | context_type_string = config_event_context_pid; |
| 251 | break; |
| 252 | case LTTNG_KERNEL_CONTEXT_PROCNAME: |
| 253 | context_type_string = config_event_context_procname; |
| 254 | break; |
| 255 | case LTTNG_KERNEL_CONTEXT_PRIO: |
| 256 | context_type_string = config_event_context_prio; |
| 257 | break; |
| 258 | case LTTNG_KERNEL_CONTEXT_NICE: |
| 259 | context_type_string = config_event_context_nice; |
| 260 | break; |
| 261 | case LTTNG_KERNEL_CONTEXT_VPID: |
| 262 | context_type_string = config_event_context_vpid; |
| 263 | break; |
| 264 | case LTTNG_KERNEL_CONTEXT_TID: |
| 265 | context_type_string = config_event_context_tid; |
| 266 | break; |
| 267 | case LTTNG_KERNEL_CONTEXT_VTID: |
| 268 | context_type_string = config_event_context_vtid; |
| 269 | break; |
| 270 | case LTTNG_KERNEL_CONTEXT_PPID: |
| 271 | context_type_string = config_event_context_ppid; |
| 272 | break; |
| 273 | case LTTNG_KERNEL_CONTEXT_VPPID: |
| 274 | context_type_string = config_event_context_vppid; |
| 275 | break; |
| 276 | case LTTNG_KERNEL_CONTEXT_HOSTNAME: |
| 277 | context_type_string = config_event_context_hostname; |
| 278 | break; |
| 279 | case LTTNG_KERNEL_CONTEXT_INTERRUPTIBLE: |
| 280 | context_type_string = config_event_context_interruptible; |
| 281 | break; |
| 282 | case LTTNG_KERNEL_CONTEXT_PREEMPTIBLE: |
| 283 | context_type_string = config_event_context_preemptible; |
| 284 | break; |
| 285 | case LTTNG_KERNEL_CONTEXT_NEED_RESCHEDULE: |
| 286 | context_type_string = config_event_context_need_reschedule; |
| 287 | break; |
| 288 | case LTTNG_KERNEL_CONTEXT_MIGRATABLE: |
| 289 | context_type_string = config_event_context_migratable; |
| 290 | break; |
| 291 | case LTTNG_KERNEL_CONTEXT_CALLSTACK_USER: |
| 292 | context_type_string = config_event_context_callstack_user; |
| 293 | break; |
| 294 | case LTTNG_KERNEL_CONTEXT_CALLSTACK_KERNEL: |
| 295 | context_type_string = config_event_context_callstack_kernel; |
| 296 | break; |
| 297 | default: |
| 298 | context_type_string = NULL; |
| 299 | } |
| 300 | |
| 301 | return context_type_string; |
| 302 | } |
| 303 | |
| 304 | static |
| 305 | const char *get_ust_context_type_string( |
| 306 | enum lttng_ust_context_type context_type) |
| 307 | { |
| 308 | const char *context_type_string; |
| 309 | |
| 310 | switch (context_type) { |
| 311 | case LTTNG_UST_CONTEXT_PROCNAME: |
| 312 | context_type_string = config_event_context_procname; |
| 313 | break; |
| 314 | case LTTNG_UST_CONTEXT_VPID: |
| 315 | context_type_string = config_event_context_vpid; |
| 316 | break; |
| 317 | case LTTNG_UST_CONTEXT_VTID: |
| 318 | context_type_string = config_event_context_vtid; |
| 319 | break; |
| 320 | case LTTNG_UST_CONTEXT_IP: |
| 321 | context_type_string = config_event_context_ip; |
| 322 | break; |
| 323 | case LTTNG_UST_CONTEXT_PTHREAD_ID: |
| 324 | context_type_string = config_event_context_pthread_id; |
| 325 | break; |
| 326 | case LTTNG_UST_CONTEXT_APP_CONTEXT: |
| 327 | context_type_string = config_event_context_app; |
| 328 | break; |
| 329 | case LTTNG_UST_CONTEXT_PERF_THREAD_COUNTER: |
| 330 | /* |
| 331 | * Error, should not be stored in the XML, perf contexts |
| 332 | * are stored as a node of type event_perf_context_type. |
| 333 | */ |
| 334 | default: |
| 335 | context_type_string = NULL; |
| 336 | break; |
| 337 | } |
| 338 | |
| 339 | return context_type_string; |
| 340 | } |
| 341 | |
| 342 | static |
| 343 | const char *get_buffer_type_string( |
| 344 | enum lttng_buffer_type buffer_type) |
| 345 | { |
| 346 | const char *buffer_type_string; |
| 347 | |
| 348 | switch (buffer_type) { |
| 349 | case LTTNG_BUFFER_PER_PID: |
| 350 | buffer_type_string = config_buffer_type_per_pid; |
| 351 | break; |
| 352 | case LTTNG_BUFFER_PER_UID: |
| 353 | buffer_type_string = config_buffer_type_per_uid; |
| 354 | break; |
| 355 | case LTTNG_BUFFER_GLOBAL: |
| 356 | buffer_type_string = config_buffer_type_global; |
| 357 | break; |
| 358 | default: |
| 359 | buffer_type_string = NULL; |
| 360 | } |
| 361 | |
| 362 | return buffer_type_string; |
| 363 | } |
| 364 | |
| 365 | static |
| 366 | const char *get_loglevel_type_string( |
| 367 | enum lttng_ust_loglevel_type loglevel_type) |
| 368 | { |
| 369 | const char *loglevel_type_string; |
| 370 | |
| 371 | switch (loglevel_type) { |
| 372 | case LTTNG_UST_LOGLEVEL_ALL: |
| 373 | loglevel_type_string = config_loglevel_type_all; |
| 374 | break; |
| 375 | case LTTNG_UST_LOGLEVEL_RANGE: |
| 376 | loglevel_type_string = config_loglevel_type_range; |
| 377 | break; |
| 378 | case LTTNG_UST_LOGLEVEL_SINGLE: |
| 379 | loglevel_type_string = config_loglevel_type_single; |
| 380 | break; |
| 381 | default: |
| 382 | loglevel_type_string = NULL; |
| 383 | } |
| 384 | |
| 385 | return loglevel_type_string; |
| 386 | } |
| 387 | |
| 388 | static |
| 389 | int save_kernel_function_event(struct config_writer *writer, |
| 390 | struct ltt_kernel_event *event) |
| 391 | { |
| 392 | int ret; |
| 393 | |
| 394 | ret = config_writer_open_element(writer, config_element_function_attributes); |
| 395 | if (ret) { |
| 396 | ret = LTTNG_ERR_SAVE_IO_FAIL; |
| 397 | goto end; |
| 398 | } |
| 399 | |
| 400 | ret = config_writer_write_element_string(writer, config_element_name, |
| 401 | event->event->u.ftrace.symbol_name); |
| 402 | if (ret) { |
| 403 | ret = LTTNG_ERR_SAVE_IO_FAIL; |
| 404 | goto end; |
| 405 | } |
| 406 | |
| 407 | /* /function attributes */ |
| 408 | ret = config_writer_close_element(writer); |
| 409 | if (ret) { |
| 410 | ret = LTTNG_ERR_SAVE_IO_FAIL; |
| 411 | goto end; |
| 412 | } |
| 413 | end: |
| 414 | return ret; |
| 415 | } |
| 416 | |
| 417 | static |
| 418 | int save_kernel_kprobe_event(struct config_writer *writer, |
| 419 | struct ltt_kernel_event *event) |
| 420 | { |
| 421 | int ret; |
| 422 | const char *symbol_name; |
| 423 | uint64_t addr; |
| 424 | uint64_t offset; |
| 425 | |
| 426 | switch (event->event->instrumentation) { |
| 427 | case LTTNG_KERNEL_KPROBE: |
| 428 | /* |
| 429 | * Comments in lttng-kernel.h mention that |
| 430 | * either addr or symbol_name are set, not both. |
| 431 | */ |
| 432 | addr = event->event->u.kprobe.addr; |
| 433 | offset = event->event->u.kprobe.offset; |
| 434 | symbol_name = addr ? NULL : event->event->u.kprobe.symbol_name; |
| 435 | break; |
| 436 | case LTTNG_KERNEL_KRETPROBE: |
| 437 | addr = event->event->u.kretprobe.addr; |
| 438 | offset = event->event->u.kretprobe.offset; |
| 439 | symbol_name = addr ? NULL : event->event->u.kretprobe.symbol_name; |
| 440 | break; |
| 441 | default: |
| 442 | assert(1); |
| 443 | ERR("Unsupported kernel instrumentation type."); |
| 444 | ret = LTTNG_ERR_INVALID; |
| 445 | goto end; |
| 446 | } |
| 447 | |
| 448 | ret = config_writer_open_element(writer, config_element_probe_attributes); |
| 449 | if (ret) { |
| 450 | ret = LTTNG_ERR_SAVE_IO_FAIL; |
| 451 | goto end; |
| 452 | } |
| 453 | |
| 454 | if (addr) { |
| 455 | ret = config_writer_write_element_unsigned_int( writer, |
| 456 | config_element_address, addr); |
| 457 | if (ret) { |
| 458 | ret = LTTNG_ERR_SAVE_IO_FAIL; |
| 459 | goto end; |
| 460 | } |
| 461 | } else if (symbol_name) { |
| 462 | ret = config_writer_write_element_string(writer, |
| 463 | config_element_symbol_name, symbol_name); |
| 464 | if (ret) { |
| 465 | ret = LTTNG_ERR_SAVE_IO_FAIL; |
| 466 | goto end; |
| 467 | } |
| 468 | /* If the offset is non-zero, write it.*/ |
| 469 | if (offset) { |
| 470 | ret = config_writer_write_element_unsigned_int(writer, |
| 471 | config_element_offset, offset); |
| 472 | if (ret) { |
| 473 | ret = LTTNG_ERR_SAVE_IO_FAIL; |
| 474 | goto end; |
| 475 | } |
| 476 | } |
| 477 | } else { |
| 478 | /* |
| 479 | * This really should not happen as we are either setting the |
| 480 | * address or the symbol above. |
| 481 | */ |
| 482 | ERR("Invalid probe/function description."); |
| 483 | ret = LTTNG_ERR_INVALID; |
| 484 | goto end; |
| 485 | } |
| 486 | |
| 487 | |
| 488 | ret = config_writer_close_element(writer); |
| 489 | if (ret) { |
| 490 | ret = LTTNG_ERR_SAVE_IO_FAIL; |
| 491 | goto end; |
| 492 | } |
| 493 | end: |
| 494 | return ret; |
| 495 | } |
| 496 | |
| 497 | /* |
| 498 | * Save the userspace probe tracepoint event associated with the event to the |
| 499 | * config writer. |
| 500 | */ |
| 501 | static |
| 502 | int save_kernel_userspace_probe_tracepoint_event(struct config_writer *writer, |
| 503 | struct ltt_kernel_event *event) |
| 504 | { |
| 505 | int ret = 0; |
| 506 | const char *probe_name, *provider_name, *binary_path; |
| 507 | const struct lttng_userspace_probe_location *userspace_probe_location; |
| 508 | const struct lttng_userspace_probe_location_lookup_method *lookup_method; |
| 509 | enum lttng_userspace_probe_location_lookup_method_type lookup_type; |
| 510 | |
| 511 | /* Get userspace probe location from the event. */ |
| 512 | userspace_probe_location = event->userspace_probe_location; |
| 513 | if (!userspace_probe_location) { |
| 514 | ret = LTTNG_ERR_SAVE_IO_FAIL; |
| 515 | goto end; |
| 516 | } |
| 517 | |
| 518 | /* Get lookup method and lookup method type. */ |
| 519 | lookup_method = lttng_userspace_probe_location_get_lookup_method(userspace_probe_location); |
| 520 | if (!lookup_method) { |
| 521 | ret = LTTNG_ERR_SAVE_IO_FAIL; |
| 522 | goto end; |
| 523 | } |
| 524 | |
| 525 | lookup_type = lttng_userspace_probe_location_lookup_method_get_type(lookup_method); |
| 526 | |
| 527 | /* Get the binary path, probe name and provider name. */ |
| 528 | binary_path = |
| 529 | lttng_userspace_probe_location_tracepoint_get_binary_path( |
| 530 | userspace_probe_location); |
| 531 | if (!binary_path) { |
| 532 | ret = LTTNG_ERR_SAVE_IO_FAIL; |
| 533 | goto end; |
| 534 | } |
| 535 | |
| 536 | probe_name = |
| 537 | lttng_userspace_probe_location_tracepoint_get_probe_name( |
| 538 | userspace_probe_location); |
| 539 | if (!probe_name) { |
| 540 | ret = LTTNG_ERR_SAVE_IO_FAIL; |
| 541 | goto end; |
| 542 | } |
| 543 | |
| 544 | provider_name = |
| 545 | lttng_userspace_probe_location_tracepoint_get_provider_name( |
| 546 | userspace_probe_location); |
| 547 | if (!provider_name) { |
| 548 | ret = LTTNG_ERR_SAVE_IO_FAIL; |
| 549 | goto end; |
| 550 | } |
| 551 | |
| 552 | /* Open a userspace probe tracepoint attribute. */ |
| 553 | ret = config_writer_open_element(writer, config_element_userspace_probe_tracepoint_attributes); |
| 554 | if (ret) { |
| 555 | ret = LTTNG_ERR_SAVE_IO_FAIL; |
| 556 | goto end; |
| 557 | } |
| 558 | |
| 559 | switch (lookup_type) { |
| 560 | case LTTNG_USERSPACE_PROBE_LOCATION_LOOKUP_METHOD_TYPE_TRACEPOINT_SDT: |
| 561 | ret = config_writer_write_element_string(writer, |
| 562 | config_element_userspace_probe_lookup, |
| 563 | config_element_userspace_probe_lookup_tracepoint_sdt); |
| 564 | if (ret) { |
| 565 | ret = LTTNG_ERR_SAVE_IO_FAIL; |
| 566 | goto end; |
| 567 | } |
| 568 | break; |
| 569 | default: |
| 570 | ERR("Unsupported kernel userspace probe tracepoint lookup method."); |
| 571 | ret = LTTNG_ERR_INVALID; |
| 572 | goto end; |
| 573 | } |
| 574 | |
| 575 | /* Write the binary path, provider name and the probe name. */ |
| 576 | ret = config_writer_write_element_string(writer, |
| 577 | config_element_userspace_probe_location_binary_path, |
| 578 | binary_path); |
| 579 | if (ret) { |
| 580 | ret = LTTNG_ERR_SAVE_IO_FAIL; |
| 581 | goto end; |
| 582 | } |
| 583 | |
| 584 | ret = config_writer_write_element_string(writer, |
| 585 | config_element_userspace_probe_tracepoint_location_provider_name, |
| 586 | provider_name); |
| 587 | if (ret) { |
| 588 | ret = LTTNG_ERR_SAVE_IO_FAIL; |
| 589 | goto end; |
| 590 | } |
| 591 | |
| 592 | ret = config_writer_write_element_string(writer, |
| 593 | config_element_userspace_probe_tracepoint_location_probe_name, |
| 594 | probe_name); |
| 595 | if (ret) { |
| 596 | ret = LTTNG_ERR_SAVE_IO_FAIL; |
| 597 | goto end; |
| 598 | } |
| 599 | |
| 600 | /* Close the userspace probe tracepoint attribute. */ |
| 601 | ret = config_writer_close_element(writer); |
| 602 | if (ret) { |
| 603 | ret = LTTNG_ERR_SAVE_IO_FAIL; |
| 604 | goto end; |
| 605 | } |
| 606 | |
| 607 | end: |
| 608 | return ret; |
| 609 | } |
| 610 | |
| 611 | /* |
| 612 | * Save the userspace probe function event associated with the event to the |
| 613 | * config writer. |
| 614 | */ |
| 615 | static |
| 616 | int save_kernel_userspace_probe_function_event(struct config_writer *writer, |
| 617 | struct ltt_kernel_event *event) |
| 618 | { |
| 619 | int ret = 0; |
| 620 | const char *function_name, *binary_path; |
| 621 | const struct lttng_userspace_probe_location *userspace_probe_location; |
| 622 | const struct lttng_userspace_probe_location_lookup_method *lookup_method; |
| 623 | enum lttng_userspace_probe_location_lookup_method_type lookup_type; |
| 624 | |
| 625 | /* Get userspace probe location from the event. */ |
| 626 | userspace_probe_location = event->userspace_probe_location; |
| 627 | if (!userspace_probe_location) { |
| 628 | ret = LTTNG_ERR_SAVE_IO_FAIL; |
| 629 | goto end; |
| 630 | } |
| 631 | |
| 632 | /* Get lookup method and lookup method type. */ |
| 633 | lookup_method = lttng_userspace_probe_location_get_lookup_method( |
| 634 | userspace_probe_location); |
| 635 | if (!lookup_method) { |
| 636 | ret = LTTNG_ERR_SAVE_IO_FAIL; |
| 637 | goto end; |
| 638 | } |
| 639 | |
| 640 | /* Get the binary path and the function name. */ |
| 641 | binary_path = |
| 642 | lttng_userspace_probe_location_function_get_binary_path( |
| 643 | userspace_probe_location); |
| 644 | if (!binary_path) { |
| 645 | ret = LTTNG_ERR_SAVE_IO_FAIL; |
| 646 | goto end; |
| 647 | } |
| 648 | |
| 649 | function_name = |
| 650 | lttng_userspace_probe_location_function_get_function_name( |
| 651 | userspace_probe_location); |
| 652 | if (!function_name) { |
| 653 | ret = LTTNG_ERR_SAVE_IO_FAIL; |
| 654 | goto end; |
| 655 | } |
| 656 | |
| 657 | /* Open a userspace probe function attribute. */ |
| 658 | ret = config_writer_open_element(writer, |
| 659 | config_element_userspace_probe_function_attributes); |
| 660 | if (ret) { |
| 661 | ret = LTTNG_ERR_SAVE_IO_FAIL; |
| 662 | goto end; |
| 663 | } |
| 664 | |
| 665 | lookup_type = lttng_userspace_probe_location_lookup_method_get_type(lookup_method); |
| 666 | switch (lookup_type) { |
| 667 | case LTTNG_USERSPACE_PROBE_LOCATION_LOOKUP_METHOD_TYPE_FUNCTION_ELF: |
| 668 | ret = config_writer_write_element_string(writer, |
| 669 | config_element_userspace_probe_lookup, |
| 670 | config_element_userspace_probe_lookup_function_elf); |
| 671 | if (ret) { |
| 672 | ret = LTTNG_ERR_SAVE_IO_FAIL; |
| 673 | goto end; |
| 674 | } |
| 675 | break; |
| 676 | case LTTNG_USERSPACE_PROBE_LOCATION_LOOKUP_METHOD_TYPE_FUNCTION_DEFAULT: |
| 677 | ret = config_writer_write_element_string(writer, |
| 678 | config_element_userspace_probe_lookup, |
| 679 | config_element_userspace_probe_lookup_function_default); |
| 680 | if (ret) { |
| 681 | ret = LTTNG_ERR_SAVE_IO_FAIL; |
| 682 | goto end; |
| 683 | } |
| 684 | break; |
| 685 | default: |
| 686 | ERR("Unsupported kernel userspace probe function lookup method."); |
| 687 | ret = LTTNG_ERR_INVALID; |
| 688 | goto end; |
| 689 | } |
| 690 | |
| 691 | /* Write the binary path and the function name. */ |
| 692 | ret = config_writer_write_element_string(writer, |
| 693 | config_element_userspace_probe_location_binary_path, |
| 694 | binary_path); |
| 695 | if (ret) { |
| 696 | ret = LTTNG_ERR_SAVE_IO_FAIL; |
| 697 | goto end; |
| 698 | } |
| 699 | |
| 700 | ret = config_writer_write_element_string(writer, |
| 701 | config_element_userspace_probe_function_location_function_name, |
| 702 | function_name); |
| 703 | if (ret) { |
| 704 | ret = LTTNG_ERR_SAVE_IO_FAIL; |
| 705 | goto end; |
| 706 | } |
| 707 | |
| 708 | /* Close the userspace probe function attribute. */ |
| 709 | ret = config_writer_close_element(writer); |
| 710 | if (ret) { |
| 711 | ret = LTTNG_ERR_SAVE_IO_FAIL; |
| 712 | goto end; |
| 713 | } |
| 714 | |
| 715 | end: |
| 716 | return ret; |
| 717 | } |
| 718 | |
| 719 | static |
| 720 | int save_kernel_userspace_probe_event(struct config_writer *writer, |
| 721 | struct ltt_kernel_event *event) |
| 722 | { |
| 723 | int ret; |
| 724 | struct lttng_userspace_probe_location *userspace_probe_location; |
| 725 | |
| 726 | /* Get userspace probe location from the event. */ |
| 727 | userspace_probe_location = event->userspace_probe_location; |
| 728 | if (!userspace_probe_location) { |
| 729 | ret = LTTNG_ERR_SAVE_IO_FAIL; |
| 730 | goto end; |
| 731 | } |
| 732 | |
| 733 | switch(lttng_userspace_probe_location_get_type(userspace_probe_location)) { |
| 734 | case LTTNG_USERSPACE_PROBE_LOCATION_TYPE_FUNCTION: |
| 735 | { |
| 736 | ret = save_kernel_userspace_probe_function_event(writer, event); |
| 737 | if (ret) { |
| 738 | ret = LTTNG_ERR_SAVE_IO_FAIL; |
| 739 | goto end; |
| 740 | } |
| 741 | break; |
| 742 | } |
| 743 | case LTTNG_USERSPACE_PROBE_LOCATION_TYPE_TRACEPOINT: |
| 744 | { |
| 745 | ret = save_kernel_userspace_probe_tracepoint_event(writer, event); |
| 746 | if (ret) { |
| 747 | ret = LTTNG_ERR_SAVE_IO_FAIL; |
| 748 | goto end; |
| 749 | } |
| 750 | break; |
| 751 | } |
| 752 | case LTTNG_USERSPACE_PROBE_LOCATION_TYPE_UNKNOWN: |
| 753 | default: |
| 754 | ERR("Unsupported kernel userspace probe location type."); |
| 755 | ret = LTTNG_ERR_INVALID; |
| 756 | goto end; |
| 757 | } |
| 758 | |
| 759 | end: |
| 760 | return ret; |
| 761 | } |
| 762 | |
| 763 | static |
| 764 | int save_kernel_event(struct config_writer *writer, |
| 765 | struct ltt_kernel_event *event) |
| 766 | { |
| 767 | int ret; |
| 768 | const char *instrumentation_type; |
| 769 | |
| 770 | ret = config_writer_open_element(writer, config_element_event); |
| 771 | if (ret) { |
| 772 | ret = LTTNG_ERR_SAVE_IO_FAIL; |
| 773 | goto end; |
| 774 | } |
| 775 | |
| 776 | if (event->event->name[0]) { |
| 777 | ret = config_writer_write_element_string(writer, |
| 778 | config_element_name, event->event->name); |
| 779 | if (ret) { |
| 780 | ret = LTTNG_ERR_SAVE_IO_FAIL; |
| 781 | goto end; |
| 782 | } |
| 783 | } |
| 784 | |
| 785 | ret = config_writer_write_element_bool(writer, config_element_enabled, |
| 786 | event->enabled); |
| 787 | if (ret) { |
| 788 | ret = LTTNG_ERR_SAVE_IO_FAIL; |
| 789 | goto end; |
| 790 | } |
| 791 | |
| 792 | instrumentation_type = get_kernel_instrumentation_string( |
| 793 | event->event->instrumentation); |
| 794 | if (!instrumentation_type) { |
| 795 | ret = LTTNG_ERR_INVALID; |
| 796 | goto end; |
| 797 | } |
| 798 | |
| 799 | ret = config_writer_write_element_string(writer, config_element_type, |
| 800 | instrumentation_type); |
| 801 | if (ret) { |
| 802 | ret = LTTNG_ERR_SAVE_IO_FAIL; |
| 803 | goto end; |
| 804 | } |
| 805 | |
| 806 | if (event->filter_expression) { |
| 807 | ret = config_writer_write_element_string(writer, |
| 808 | config_element_filter, |
| 809 | event->filter_expression); |
| 810 | if (ret) { |
| 811 | ret = LTTNG_ERR_SAVE_IO_FAIL; |
| 812 | goto end; |
| 813 | } |
| 814 | } |
| 815 | |
| 816 | if (event->event->instrumentation == LTTNG_KERNEL_FUNCTION || |
| 817 | event->event->instrumentation == LTTNG_KERNEL_KPROBE || |
| 818 | event->event->instrumentation == LTTNG_KERNEL_UPROBE || |
| 819 | event->event->instrumentation == LTTNG_KERNEL_KRETPROBE) { |
| 820 | |
| 821 | ret = config_writer_open_element(writer, |
| 822 | config_element_attributes); |
| 823 | if (ret) { |
| 824 | ret = LTTNG_ERR_SAVE_IO_FAIL; |
| 825 | goto end; |
| 826 | } |
| 827 | |
| 828 | switch (event->event->instrumentation) { |
| 829 | case LTTNG_KERNEL_SYSCALL: |
| 830 | case LTTNG_KERNEL_FUNCTION: |
| 831 | ret = save_kernel_function_event(writer, event); |
| 832 | if (ret) { |
| 833 | goto end; |
| 834 | } |
| 835 | break; |
| 836 | case LTTNG_KERNEL_KPROBE: |
| 837 | case LTTNG_KERNEL_KRETPROBE: |
| 838 | ret = save_kernel_kprobe_event(writer, event); |
| 839 | if (ret) { |
| 840 | goto end; |
| 841 | } |
| 842 | break; |
| 843 | case LTTNG_KERNEL_UPROBE: |
| 844 | ret = save_kernel_userspace_probe_event(writer, event); |
| 845 | if (ret) { |
| 846 | goto end; |
| 847 | } |
| 848 | break; |
| 849 | default: |
| 850 | ERR("Unsupported kernel instrumentation type."); |
| 851 | ret = LTTNG_ERR_INVALID; |
| 852 | goto end; |
| 853 | } |
| 854 | |
| 855 | /* /attributes */ |
| 856 | ret = config_writer_close_element(writer); |
| 857 | if (ret) { |
| 858 | ret = LTTNG_ERR_SAVE_IO_FAIL; |
| 859 | goto end; |
| 860 | } |
| 861 | } |
| 862 | |
| 863 | /* /event */ |
| 864 | ret = config_writer_close_element(writer); |
| 865 | if (ret) { |
| 866 | ret = LTTNG_ERR_SAVE_IO_FAIL; |
| 867 | goto end; |
| 868 | } |
| 869 | end: |
| 870 | return ret; |
| 871 | } |
| 872 | |
| 873 | static |
| 874 | int save_kernel_events(struct config_writer *writer, |
| 875 | struct ltt_kernel_channel *kchan) |
| 876 | { |
| 877 | int ret; |
| 878 | struct ltt_kernel_event *event; |
| 879 | |
| 880 | ret = config_writer_open_element(writer, config_element_events); |
| 881 | if (ret) { |
| 882 | ret = LTTNG_ERR_SAVE_IO_FAIL; |
| 883 | goto end; |
| 884 | } |
| 885 | |
| 886 | cds_list_for_each_entry(event, &kchan->events_list.head, list) { |
| 887 | ret = save_kernel_event(writer, event); |
| 888 | if (ret) { |
| 889 | goto end; |
| 890 | } |
| 891 | } |
| 892 | |
| 893 | /* /events */ |
| 894 | ret = config_writer_close_element(writer); |
| 895 | if (ret) { |
| 896 | ret = LTTNG_ERR_SAVE_IO_FAIL; |
| 897 | goto end; |
| 898 | } |
| 899 | end: |
| 900 | return ret; |
| 901 | } |
| 902 | |
| 903 | static |
| 904 | int save_ust_event(struct config_writer *writer, |
| 905 | struct ltt_ust_event *event) |
| 906 | { |
| 907 | int ret; |
| 908 | const char *loglevel_type_string; |
| 909 | |
| 910 | ret = config_writer_open_element(writer, config_element_event); |
| 911 | if (ret) { |
| 912 | ret = LTTNG_ERR_SAVE_IO_FAIL; |
| 913 | goto end; |
| 914 | } |
| 915 | |
| 916 | if (event->attr.name[0]) { |
| 917 | ret = config_writer_write_element_string(writer, |
| 918 | config_element_name, event->attr.name); |
| 919 | if (ret) { |
| 920 | ret = LTTNG_ERR_SAVE_IO_FAIL; |
| 921 | goto end; |
| 922 | } |
| 923 | } |
| 924 | |
| 925 | ret = config_writer_write_element_bool(writer, config_element_enabled, |
| 926 | event->enabled); |
| 927 | if (ret) { |
| 928 | ret = LTTNG_ERR_SAVE_IO_FAIL; |
| 929 | goto end; |
| 930 | } |
| 931 | |
| 932 | if (event->attr.instrumentation != LTTNG_UST_TRACEPOINT) { |
| 933 | ERR("Unsupported UST instrumentation type."); |
| 934 | ret = LTTNG_ERR_INVALID; |
| 935 | goto end; |
| 936 | } |
| 937 | ret = config_writer_write_element_string(writer, config_element_type, |
| 938 | config_event_type_tracepoint); |
| 939 | if (ret) { |
| 940 | ret = LTTNG_ERR_SAVE_IO_FAIL; |
| 941 | goto end; |
| 942 | } |
| 943 | |
| 944 | loglevel_type_string = get_loglevel_type_string( |
| 945 | event->attr.loglevel_type); |
| 946 | if (!loglevel_type_string) { |
| 947 | ERR("Unsupported UST loglevel type."); |
| 948 | ret = LTTNG_ERR_INVALID; |
| 949 | goto end; |
| 950 | } |
| 951 | |
| 952 | ret = config_writer_write_element_string(writer, |
| 953 | config_element_loglevel_type, loglevel_type_string); |
| 954 | if (ret) { |
| 955 | ret = LTTNG_ERR_SAVE_IO_FAIL; |
| 956 | goto end; |
| 957 | } |
| 958 | |
| 959 | /* The log level is irrelevant if no "filtering" is enabled */ |
| 960 | if (event->attr.loglevel_type != LTTNG_UST_LOGLEVEL_ALL) { |
| 961 | ret = config_writer_write_element_signed_int(writer, |
| 962 | config_element_loglevel, event->attr.loglevel); |
| 963 | if (ret) { |
| 964 | ret = LTTNG_ERR_SAVE_IO_FAIL; |
| 965 | goto end; |
| 966 | } |
| 967 | } |
| 968 | |
| 969 | if (event->filter_expression) { |
| 970 | ret = config_writer_write_element_string(writer, |
| 971 | config_element_filter, event->filter_expression); |
| 972 | if (ret) { |
| 973 | ret = LTTNG_ERR_SAVE_IO_FAIL; |
| 974 | goto end; |
| 975 | } |
| 976 | } |
| 977 | |
| 978 | if (event->exclusion && event->exclusion->count) { |
| 979 | uint32_t i; |
| 980 | |
| 981 | ret = config_writer_open_element(writer, |
| 982 | config_element_exclusions); |
| 983 | if (ret) { |
| 984 | ret = LTTNG_ERR_SAVE_IO_FAIL; |
| 985 | goto end; |
| 986 | } |
| 987 | |
| 988 | for (i = 0; i < event->exclusion->count; i++) { |
| 989 | ret = config_writer_write_element_string(writer, |
| 990 | config_element_exclusion, |
| 991 | LTTNG_EVENT_EXCLUSION_NAME_AT( |
| 992 | event->exclusion, i)); |
| 993 | if (ret) { |
| 994 | ret = LTTNG_ERR_SAVE_IO_FAIL; |
| 995 | goto end; |
| 996 | } |
| 997 | } |
| 998 | |
| 999 | /* /exclusions */ |
| 1000 | ret = config_writer_close_element(writer); |
| 1001 | if (ret) { |
| 1002 | ret = LTTNG_ERR_SAVE_IO_FAIL; |
| 1003 | goto end; |
| 1004 | } |
| 1005 | } |
| 1006 | |
| 1007 | /* /event */ |
| 1008 | ret = config_writer_close_element(writer); |
| 1009 | if (ret) { |
| 1010 | ret = LTTNG_ERR_SAVE_IO_FAIL; |
| 1011 | goto end; |
| 1012 | } |
| 1013 | end: |
| 1014 | return ret; |
| 1015 | } |
| 1016 | |
| 1017 | static |
| 1018 | int save_ust_events(struct config_writer *writer, |
| 1019 | struct lttng_ht *events) |
| 1020 | { |
| 1021 | int ret; |
| 1022 | struct ltt_ust_event *event; |
| 1023 | struct lttng_ht_node_str *node; |
| 1024 | struct lttng_ht_iter iter; |
| 1025 | |
| 1026 | ret = config_writer_open_element(writer, config_element_events); |
| 1027 | if (ret) { |
| 1028 | ret = LTTNG_ERR_SAVE_IO_FAIL; |
| 1029 | goto end; |
| 1030 | } |
| 1031 | |
| 1032 | rcu_read_lock(); |
| 1033 | cds_lfht_for_each_entry(events->ht, &iter.iter, node, node) { |
| 1034 | event = caa_container_of(node, struct ltt_ust_event, node); |
| 1035 | |
| 1036 | if (event->internal) { |
| 1037 | /* Internal events must not be exposed to clients */ |
| 1038 | continue; |
| 1039 | } |
| 1040 | ret = save_ust_event(writer, event); |
| 1041 | if (ret) { |
| 1042 | rcu_read_unlock(); |
| 1043 | goto end; |
| 1044 | } |
| 1045 | } |
| 1046 | rcu_read_unlock(); |
| 1047 | |
| 1048 | /* /events */ |
| 1049 | ret = config_writer_close_element(writer); |
| 1050 | if (ret) { |
| 1051 | ret = LTTNG_ERR_SAVE_IO_FAIL; |
| 1052 | goto end; |
| 1053 | } |
| 1054 | end: |
| 1055 | return ret; |
| 1056 | } |
| 1057 | |
| 1058 | static |
| 1059 | int init_ust_event_from_agent_event(struct ltt_ust_event *ust_event, |
| 1060 | struct agent_event *agent_event) |
| 1061 | { |
| 1062 | int ret = 0; |
| 1063 | enum lttng_ust_loglevel_type ust_loglevel_type; |
| 1064 | |
| 1065 | ust_event->enabled = agent_event->enabled; |
| 1066 | ust_event->attr.instrumentation = LTTNG_UST_TRACEPOINT; |
| 1067 | if (lttng_strncpy(ust_event->attr.name, agent_event->name, |
| 1068 | LTTNG_SYMBOL_NAME_LEN)) { |
| 1069 | ret = -1; |
| 1070 | goto end; |
| 1071 | } |
| 1072 | switch (agent_event->loglevel_type) { |
| 1073 | case LTTNG_EVENT_LOGLEVEL_ALL: |
| 1074 | ust_loglevel_type = LTTNG_UST_LOGLEVEL_ALL; |
| 1075 | break; |
| 1076 | case LTTNG_EVENT_LOGLEVEL_SINGLE: |
| 1077 | ust_loglevel_type = LTTNG_UST_LOGLEVEL_SINGLE; |
| 1078 | break; |
| 1079 | case LTTNG_EVENT_LOGLEVEL_RANGE: |
| 1080 | ust_loglevel_type = LTTNG_UST_LOGLEVEL_RANGE; |
| 1081 | break; |
| 1082 | default: |
| 1083 | ERR("Invalid agent_event loglevel_type."); |
| 1084 | ret = -1; |
| 1085 | goto end; |
| 1086 | } |
| 1087 | |
| 1088 | ust_event->attr.loglevel_type = ust_loglevel_type; |
| 1089 | ust_event->attr.loglevel = agent_event->loglevel_value; |
| 1090 | ust_event->filter_expression = agent_event->filter_expression; |
| 1091 | ust_event->exclusion = agent_event->exclusion; |
| 1092 | end: |
| 1093 | return ret; |
| 1094 | } |
| 1095 | |
| 1096 | static |
| 1097 | int save_agent_events(struct config_writer *writer, |
| 1098 | struct agent *agent) |
| 1099 | { |
| 1100 | int ret; |
| 1101 | struct lttng_ht_iter iter; |
| 1102 | struct lttng_ht_node_str *node; |
| 1103 | |
| 1104 | ret = config_writer_open_element(writer, config_element_events); |
| 1105 | if (ret) { |
| 1106 | ret = LTTNG_ERR_SAVE_IO_FAIL; |
| 1107 | goto end; |
| 1108 | } |
| 1109 | |
| 1110 | rcu_read_lock(); |
| 1111 | cds_lfht_for_each_entry(agent->events->ht, &iter.iter, node, node) { |
| 1112 | int ret; |
| 1113 | struct agent_event *agent_event; |
| 1114 | struct ltt_ust_event fake_event; |
| 1115 | |
| 1116 | memset(&fake_event, 0, sizeof(fake_event)); |
| 1117 | agent_event = caa_container_of(node, struct agent_event, node); |
| 1118 | |
| 1119 | /* |
| 1120 | * Initialize a fake ust event to reuse the same serialization |
| 1121 | * function since UST and agent events contain the same info |
| 1122 | * (and one could wonder why they don't reuse the same |
| 1123 | * structures...). |
| 1124 | */ |
| 1125 | ret = init_ust_event_from_agent_event(&fake_event, agent_event); |
| 1126 | if (ret) { |
| 1127 | rcu_read_unlock(); |
| 1128 | goto end; |
| 1129 | } |
| 1130 | ret = save_ust_event(writer, &fake_event); |
| 1131 | if (ret) { |
| 1132 | rcu_read_unlock(); |
| 1133 | goto end; |
| 1134 | } |
| 1135 | } |
| 1136 | rcu_read_unlock(); |
| 1137 | |
| 1138 | /* /events */ |
| 1139 | ret = config_writer_close_element(writer); |
| 1140 | if (ret) { |
| 1141 | ret = LTTNG_ERR_SAVE_IO_FAIL; |
| 1142 | goto end; |
| 1143 | } |
| 1144 | end: |
| 1145 | return ret; |
| 1146 | } |
| 1147 | |
| 1148 | static |
| 1149 | int save_kernel_context(struct config_writer *writer, |
| 1150 | struct lttng_kernel_context *ctx) |
| 1151 | { |
| 1152 | int ret = 0; |
| 1153 | |
| 1154 | if (!ctx) { |
| 1155 | goto end; |
| 1156 | } |
| 1157 | |
| 1158 | ret = config_writer_open_element(writer, config_element_context); |
| 1159 | if (ret) { |
| 1160 | ret = LTTNG_ERR_SAVE_IO_FAIL; |
| 1161 | goto end; |
| 1162 | } |
| 1163 | |
| 1164 | if (ctx->ctx == LTTNG_KERNEL_CONTEXT_PERF_CPU_COUNTER) { |
| 1165 | ret = config_writer_open_element(writer, |
| 1166 | config_element_context_perf); |
| 1167 | if (ret) { |
| 1168 | ret = LTTNG_ERR_SAVE_IO_FAIL; |
| 1169 | goto end; |
| 1170 | } |
| 1171 | |
| 1172 | ret = config_writer_write_element_unsigned_int(writer, |
| 1173 | config_element_type, ctx->u.perf_counter.type); |
| 1174 | if (ret) { |
| 1175 | ret = LTTNG_ERR_SAVE_IO_FAIL; |
| 1176 | goto end; |
| 1177 | } |
| 1178 | |
| 1179 | ret = config_writer_write_element_unsigned_int(writer, |
| 1180 | config_element_config, ctx->u.perf_counter.config); |
| 1181 | if (ret) { |
| 1182 | ret = LTTNG_ERR_SAVE_IO_FAIL; |
| 1183 | goto end; |
| 1184 | } |
| 1185 | |
| 1186 | ret = config_writer_write_element_string(writer, |
| 1187 | config_element_name, ctx->u.perf_counter.name); |
| 1188 | if (ret) { |
| 1189 | ret = LTTNG_ERR_SAVE_IO_FAIL; |
| 1190 | goto end; |
| 1191 | } |
| 1192 | |
| 1193 | /* /perf */ |
| 1194 | ret = config_writer_close_element(writer); |
| 1195 | if (ret) { |
| 1196 | ret = LTTNG_ERR_SAVE_IO_FAIL; |
| 1197 | goto end; |
| 1198 | } |
| 1199 | } else { |
| 1200 | const char *context_type_string = |
| 1201 | get_kernel_context_type_string(ctx->ctx); |
| 1202 | |
| 1203 | if (!context_type_string) { |
| 1204 | ERR("Unsupported kernel context type."); |
| 1205 | ret = LTTNG_ERR_INVALID; |
| 1206 | goto end; |
| 1207 | } |
| 1208 | |
| 1209 | ret = config_writer_write_element_string(writer, |
| 1210 | config_element_type, context_type_string); |
| 1211 | if (ret) { |
| 1212 | ret = LTTNG_ERR_SAVE_IO_FAIL; |
| 1213 | goto end; |
| 1214 | } |
| 1215 | } |
| 1216 | |
| 1217 | /* /context */ |
| 1218 | ret = config_writer_close_element(writer); |
| 1219 | if (ret) { |
| 1220 | ret = LTTNG_ERR_SAVE_IO_FAIL; |
| 1221 | goto end; |
| 1222 | } |
| 1223 | |
| 1224 | end: |
| 1225 | return ret; |
| 1226 | } |
| 1227 | |
| 1228 | static |
| 1229 | int save_kernel_contexts(struct config_writer *writer, |
| 1230 | struct ltt_kernel_channel *kchan) |
| 1231 | { |
| 1232 | int ret; |
| 1233 | struct ltt_kernel_context *ctx; |
| 1234 | |
| 1235 | if (cds_list_empty(&kchan->ctx_list)) { |
| 1236 | ret = 0; |
| 1237 | goto end; |
| 1238 | } |
| 1239 | |
| 1240 | ret = config_writer_open_element(writer, config_element_contexts); |
| 1241 | if (ret) { |
| 1242 | ret = LTTNG_ERR_SAVE_IO_FAIL; |
| 1243 | goto end; |
| 1244 | } |
| 1245 | |
| 1246 | cds_list_for_each_entry(ctx, &kchan->ctx_list, list) { |
| 1247 | ret = save_kernel_context(writer, &ctx->ctx); |
| 1248 | if (ret) { |
| 1249 | goto end; |
| 1250 | } |
| 1251 | } |
| 1252 | |
| 1253 | /* /contexts */ |
| 1254 | ret = config_writer_close_element(writer); |
| 1255 | if (ret) { |
| 1256 | ret = LTTNG_ERR_SAVE_IO_FAIL; |
| 1257 | goto end; |
| 1258 | } |
| 1259 | end: |
| 1260 | return ret; |
| 1261 | } |
| 1262 | |
| 1263 | static |
| 1264 | int save_ust_context_perf_thread_counter(struct config_writer *writer, |
| 1265 | struct ltt_ust_context *ctx) |
| 1266 | { |
| 1267 | int ret; |
| 1268 | |
| 1269 | assert(writer); |
| 1270 | assert(ctx); |
| 1271 | |
| 1272 | /* Perf contexts are saved as event_perf_context_type */ |
| 1273 | ret = config_writer_open_element(writer, config_element_context_perf); |
| 1274 | if (ret) { |
| 1275 | ret = LTTNG_ERR_SAVE_IO_FAIL; |
| 1276 | goto end; |
| 1277 | } |
| 1278 | |
| 1279 | ret = config_writer_write_element_unsigned_int(writer, |
| 1280 | config_element_type, ctx->ctx.u.perf_counter.type); |
| 1281 | if (ret) { |
| 1282 | ret = LTTNG_ERR_SAVE_IO_FAIL; |
| 1283 | goto end; |
| 1284 | } |
| 1285 | |
| 1286 | ret = config_writer_write_element_unsigned_int(writer, |
| 1287 | config_element_config, ctx->ctx.u.perf_counter.config); |
| 1288 | if (ret) { |
| 1289 | ret = LTTNG_ERR_SAVE_IO_FAIL; |
| 1290 | goto end; |
| 1291 | } |
| 1292 | |
| 1293 | ret = config_writer_write_element_string(writer, config_element_name, |
| 1294 | ctx->ctx.u.perf_counter.name); |
| 1295 | if (ret) { |
| 1296 | ret = LTTNG_ERR_SAVE_IO_FAIL; |
| 1297 | goto end; |
| 1298 | } |
| 1299 | |
| 1300 | /* /perf */ |
| 1301 | ret = config_writer_close_element(writer); |
| 1302 | if (ret) { |
| 1303 | ret = LTTNG_ERR_SAVE_IO_FAIL; |
| 1304 | goto end; |
| 1305 | } |
| 1306 | end: |
| 1307 | return ret; |
| 1308 | } |
| 1309 | |
| 1310 | static |
| 1311 | int save_ust_context_app_ctx(struct config_writer *writer, |
| 1312 | struct ltt_ust_context *ctx) |
| 1313 | { |
| 1314 | int ret; |
| 1315 | |
| 1316 | assert(writer); |
| 1317 | assert(ctx); |
| 1318 | |
| 1319 | /* Application contexts are saved as application_context_type */ |
| 1320 | ret = config_writer_open_element(writer, config_element_context_app); |
| 1321 | if (ret) { |
| 1322 | ret = LTTNG_ERR_SAVE_IO_FAIL; |
| 1323 | goto end; |
| 1324 | } |
| 1325 | |
| 1326 | ret = config_writer_write_element_string(writer, |
| 1327 | config_element_context_app_provider_name, |
| 1328 | ctx->ctx.u.app_ctx.provider_name); |
| 1329 | if (ret) { |
| 1330 | ret = LTTNG_ERR_SAVE_IO_FAIL; |
| 1331 | goto end; |
| 1332 | } |
| 1333 | |
| 1334 | ret = config_writer_write_element_string(writer, |
| 1335 | config_element_context_app_ctx_name, |
| 1336 | ctx->ctx.u.app_ctx.ctx_name); |
| 1337 | if (ret) { |
| 1338 | ret = LTTNG_ERR_SAVE_IO_FAIL; |
| 1339 | goto end; |
| 1340 | } |
| 1341 | |
| 1342 | /* /app */ |
| 1343 | ret = config_writer_close_element(writer); |
| 1344 | if (ret) { |
| 1345 | ret = LTTNG_ERR_SAVE_IO_FAIL; |
| 1346 | goto end; |
| 1347 | } |
| 1348 | end: |
| 1349 | return ret; |
| 1350 | } |
| 1351 | |
| 1352 | static |
| 1353 | int save_ust_context_generic(struct config_writer *writer, |
| 1354 | struct ltt_ust_context *ctx) |
| 1355 | { |
| 1356 | int ret; |
| 1357 | const char *context_type_string; |
| 1358 | |
| 1359 | assert(writer); |
| 1360 | assert(ctx); |
| 1361 | |
| 1362 | /* Save context as event_context_type_type */ |
| 1363 | context_type_string = get_ust_context_type_string( |
| 1364 | ctx->ctx.ctx); |
| 1365 | if (!context_type_string) { |
| 1366 | ERR("Unsupported UST context type."); |
| 1367 | ret = LTTNG_ERR_SAVE_IO_FAIL; |
| 1368 | goto end; |
| 1369 | } |
| 1370 | |
| 1371 | ret = config_writer_write_element_string(writer, |
| 1372 | config_element_type, context_type_string); |
| 1373 | if (ret) { |
| 1374 | ret = LTTNG_ERR_SAVE_IO_FAIL; |
| 1375 | goto end; |
| 1376 | } |
| 1377 | end: |
| 1378 | return ret; |
| 1379 | } |
| 1380 | |
| 1381 | static |
| 1382 | int save_ust_context(struct config_writer *writer, |
| 1383 | struct cds_list_head *ctx_list) |
| 1384 | { |
| 1385 | int ret; |
| 1386 | struct ltt_ust_context *ctx; |
| 1387 | |
| 1388 | assert(writer); |
| 1389 | assert(ctx_list); |
| 1390 | |
| 1391 | ret = config_writer_open_element(writer, config_element_contexts); |
| 1392 | if (ret) { |
| 1393 | ret = LTTNG_ERR_SAVE_IO_FAIL; |
| 1394 | goto end; |
| 1395 | } |
| 1396 | |
| 1397 | cds_list_for_each_entry(ctx, ctx_list, list) { |
| 1398 | ret = config_writer_open_element(writer, |
| 1399 | config_element_context); |
| 1400 | if (ret) { |
| 1401 | ret = LTTNG_ERR_SAVE_IO_FAIL; |
| 1402 | goto end; |
| 1403 | } |
| 1404 | |
| 1405 | switch (ctx->ctx.ctx) { |
| 1406 | case LTTNG_UST_CONTEXT_PERF_THREAD_COUNTER: |
| 1407 | ret = save_ust_context_perf_thread_counter(writer, ctx); |
| 1408 | break; |
| 1409 | case LTTNG_UST_CONTEXT_APP_CONTEXT: |
| 1410 | ret = save_ust_context_app_ctx(writer, ctx); |
| 1411 | break; |
| 1412 | default: |
| 1413 | /* Save generic context. */ |
| 1414 | ret = save_ust_context_generic(writer, ctx); |
| 1415 | } |
| 1416 | if (ret) { |
| 1417 | goto end; |
| 1418 | } |
| 1419 | |
| 1420 | /* /context */ |
| 1421 | ret = config_writer_close_element(writer); |
| 1422 | if (ret) { |
| 1423 | ret = LTTNG_ERR_SAVE_IO_FAIL; |
| 1424 | goto end; |
| 1425 | } |
| 1426 | } |
| 1427 | |
| 1428 | /* /contexts */ |
| 1429 | ret = config_writer_close_element(writer); |
| 1430 | if (ret) { |
| 1431 | ret = LTTNG_ERR_SAVE_IO_FAIL; |
| 1432 | goto end; |
| 1433 | } |
| 1434 | end: |
| 1435 | return ret; |
| 1436 | } |
| 1437 | |
| 1438 | static |
| 1439 | int save_kernel_channel(struct config_writer *writer, |
| 1440 | struct ltt_kernel_channel *kchan) |
| 1441 | { |
| 1442 | int ret; |
| 1443 | |
| 1444 | assert(writer); |
| 1445 | assert(kchan); |
| 1446 | |
| 1447 | ret = config_writer_open_element(writer, config_element_channel); |
| 1448 | if (ret) { |
| 1449 | ret = LTTNG_ERR_SAVE_IO_FAIL; |
| 1450 | goto end; |
| 1451 | } |
| 1452 | |
| 1453 | ret = config_writer_write_element_string(writer, config_element_name, |
| 1454 | kchan->channel->name); |
| 1455 | if (ret) { |
| 1456 | ret = LTTNG_ERR_SAVE_IO_FAIL; |
| 1457 | goto end; |
| 1458 | } |
| 1459 | |
| 1460 | ret = config_writer_write_element_bool(writer, config_element_enabled, |
| 1461 | kchan->channel->enabled); |
| 1462 | if (ret) { |
| 1463 | ret = LTTNG_ERR_SAVE_IO_FAIL; |
| 1464 | goto end; |
| 1465 | } |
| 1466 | |
| 1467 | ret = save_kernel_channel_attributes(writer, &kchan->channel->attr); |
| 1468 | if (ret) { |
| 1469 | goto end; |
| 1470 | } |
| 1471 | |
| 1472 | ret = save_kernel_events(writer, kchan); |
| 1473 | if (ret) { |
| 1474 | goto end; |
| 1475 | } |
| 1476 | |
| 1477 | ret = save_kernel_contexts(writer, kchan); |
| 1478 | if (ret) { |
| 1479 | goto end; |
| 1480 | } |
| 1481 | |
| 1482 | /* /channel */ |
| 1483 | ret = config_writer_close_element(writer); |
| 1484 | if (ret) { |
| 1485 | ret = LTTNG_ERR_SAVE_IO_FAIL; |
| 1486 | goto end; |
| 1487 | } |
| 1488 | end: |
| 1489 | return ret; |
| 1490 | } |
| 1491 | |
| 1492 | static |
| 1493 | int save_ust_channel(struct config_writer *writer, |
| 1494 | struct ltt_ust_channel *ust_chan, |
| 1495 | struct ltt_ust_session *session) |
| 1496 | { |
| 1497 | int ret; |
| 1498 | |
| 1499 | assert(writer); |
| 1500 | assert(ust_chan); |
| 1501 | assert(session); |
| 1502 | |
| 1503 | ret = config_writer_open_element(writer, config_element_channel); |
| 1504 | if (ret) { |
| 1505 | ret = LTTNG_ERR_SAVE_IO_FAIL; |
| 1506 | goto end; |
| 1507 | } |
| 1508 | |
| 1509 | ret = config_writer_write_element_string(writer, config_element_name, |
| 1510 | ust_chan->name); |
| 1511 | if (ret) { |
| 1512 | ret = LTTNG_ERR_SAVE_IO_FAIL; |
| 1513 | goto end; |
| 1514 | } |
| 1515 | |
| 1516 | ret = config_writer_write_element_bool(writer, config_element_enabled, |
| 1517 | ust_chan->enabled); |
| 1518 | if (ret) { |
| 1519 | ret = LTTNG_ERR_SAVE_IO_FAIL; |
| 1520 | goto end; |
| 1521 | } |
| 1522 | |
| 1523 | ret = save_ust_channel_attributes(writer, &ust_chan->attr); |
| 1524 | if (ret) { |
| 1525 | goto end; |
| 1526 | } |
| 1527 | |
| 1528 | ret = config_writer_write_element_unsigned_int(writer, |
| 1529 | config_element_tracefile_size, ust_chan->tracefile_size); |
| 1530 | if (ret) { |
| 1531 | ret = LTTNG_ERR_SAVE_IO_FAIL; |
| 1532 | goto end; |
| 1533 | } |
| 1534 | |
| 1535 | ret = config_writer_write_element_unsigned_int(writer, |
| 1536 | config_element_tracefile_count, ust_chan->tracefile_count); |
| 1537 | if (ret) { |
| 1538 | ret = LTTNG_ERR_SAVE_IO_FAIL; |
| 1539 | goto end; |
| 1540 | } |
| 1541 | |
| 1542 | ret = config_writer_write_element_unsigned_int(writer, |
| 1543 | config_element_live_timer_interval, |
| 1544 | session->live_timer_interval); |
| 1545 | if (ret) { |
| 1546 | ret = LTTNG_ERR_SAVE_IO_FAIL; |
| 1547 | goto end; |
| 1548 | } |
| 1549 | |
| 1550 | if (ust_chan->domain == LTTNG_DOMAIN_UST) { |
| 1551 | ret = save_ust_events(writer, ust_chan->events); |
| 1552 | if (ret) { |
| 1553 | goto end; |
| 1554 | } |
| 1555 | } else { |
| 1556 | struct agent *agent = NULL; |
| 1557 | |
| 1558 | agent = trace_ust_find_agent(session, ust_chan->domain); |
| 1559 | if (!agent) { |
| 1560 | ret = LTTNG_ERR_SAVE_IO_FAIL; |
| 1561 | ERR("Could not find agent associated to UST subdomain"); |
| 1562 | goto end; |
| 1563 | } |
| 1564 | |
| 1565 | /* |
| 1566 | * Channels associated with a UST sub-domain (such as JUL, Log4j |
| 1567 | * or Python) don't have any non-internal events. We retrieve |
| 1568 | * the "agent" events associated with this channel and serialize |
| 1569 | * them. |
| 1570 | */ |
| 1571 | ret = save_agent_events(writer, agent); |
| 1572 | if (ret) { |
| 1573 | goto end; |
| 1574 | } |
| 1575 | } |
| 1576 | |
| 1577 | ret = save_ust_context(writer, &ust_chan->ctx_list); |
| 1578 | if (ret) { |
| 1579 | goto end; |
| 1580 | } |
| 1581 | |
| 1582 | /* /channel */ |
| 1583 | ret = config_writer_close_element(writer); |
| 1584 | if (ret) { |
| 1585 | ret = LTTNG_ERR_SAVE_IO_FAIL; |
| 1586 | goto end; |
| 1587 | } |
| 1588 | end: |
| 1589 | return ret; |
| 1590 | } |
| 1591 | |
| 1592 | static |
| 1593 | int save_kernel_session(struct config_writer *writer, |
| 1594 | struct ltt_session *session) |
| 1595 | { |
| 1596 | int ret; |
| 1597 | struct ltt_kernel_channel *kchan; |
| 1598 | |
| 1599 | assert(writer); |
| 1600 | assert(session); |
| 1601 | |
| 1602 | ret = config_writer_write_element_string(writer, config_element_type, |
| 1603 | config_domain_type_kernel); |
| 1604 | if (ret) { |
| 1605 | ret = LTTNG_ERR_SAVE_IO_FAIL; |
| 1606 | goto end; |
| 1607 | } |
| 1608 | |
| 1609 | ret = config_writer_write_element_string(writer, |
| 1610 | config_element_buffer_type, config_buffer_type_global); |
| 1611 | if (ret) { |
| 1612 | ret = LTTNG_ERR_SAVE_IO_FAIL; |
| 1613 | goto end; |
| 1614 | } |
| 1615 | |
| 1616 | ret = config_writer_open_element(writer, |
| 1617 | config_element_channels); |
| 1618 | if (ret) { |
| 1619 | ret = LTTNG_ERR_SAVE_IO_FAIL; |
| 1620 | goto end; |
| 1621 | } |
| 1622 | |
| 1623 | cds_list_for_each_entry(kchan, &session->kernel_session->channel_list.head, |
| 1624 | list) { |
| 1625 | ret = save_kernel_channel(writer, kchan); |
| 1626 | if (ret) { |
| 1627 | goto end; |
| 1628 | } |
| 1629 | } |
| 1630 | |
| 1631 | /* /channels */ |
| 1632 | ret = config_writer_close_element(writer); |
| 1633 | if (ret) { |
| 1634 | ret = LTTNG_ERR_SAVE_IO_FAIL; |
| 1635 | goto end; |
| 1636 | } |
| 1637 | end: |
| 1638 | return ret; |
| 1639 | } |
| 1640 | |
| 1641 | static |
| 1642 | const char *get_config_domain_str(enum lttng_domain_type domain) |
| 1643 | { |
| 1644 | const char *str_dom; |
| 1645 | |
| 1646 | switch (domain) { |
| 1647 | case LTTNG_DOMAIN_KERNEL: |
| 1648 | str_dom = config_domain_type_kernel; |
| 1649 | break; |
| 1650 | case LTTNG_DOMAIN_UST: |
| 1651 | str_dom = config_domain_type_ust; |
| 1652 | break; |
| 1653 | case LTTNG_DOMAIN_JUL: |
| 1654 | str_dom = config_domain_type_jul; |
| 1655 | break; |
| 1656 | case LTTNG_DOMAIN_LOG4J: |
| 1657 | str_dom = config_domain_type_log4j; |
| 1658 | break; |
| 1659 | case LTTNG_DOMAIN_PYTHON: |
| 1660 | str_dom = config_domain_type_python; |
| 1661 | break; |
| 1662 | default: |
| 1663 | assert(0); |
| 1664 | } |
| 1665 | |
| 1666 | return str_dom; |
| 1667 | } |
| 1668 | |
| 1669 | static |
| 1670 | int save_pid_tracker(struct config_writer *writer, |
| 1671 | struct ltt_session *sess, int domain) |
| 1672 | { |
| 1673 | int ret = 0; |
| 1674 | ssize_t nr_pids = 0, i; |
| 1675 | int32_t *pids = NULL; |
| 1676 | |
| 1677 | switch (domain) { |
| 1678 | case LTTNG_DOMAIN_KERNEL: |
| 1679 | { |
| 1680 | nr_pids = kernel_list_tracker_pids(sess->kernel_session, &pids); |
| 1681 | if (nr_pids < 0) { |
| 1682 | ret = LTTNG_ERR_KERN_LIST_FAIL; |
| 1683 | goto end; |
| 1684 | } |
| 1685 | break; |
| 1686 | } |
| 1687 | case LTTNG_DOMAIN_UST: |
| 1688 | { |
| 1689 | nr_pids = trace_ust_list_tracker_pids(sess->ust_session, &pids); |
| 1690 | if (nr_pids < 0) { |
| 1691 | ret = LTTNG_ERR_UST_LIST_FAIL; |
| 1692 | goto end; |
| 1693 | } |
| 1694 | break; |
| 1695 | } |
| 1696 | case LTTNG_DOMAIN_JUL: |
| 1697 | case LTTNG_DOMAIN_LOG4J: |
| 1698 | case LTTNG_DOMAIN_PYTHON: |
| 1699 | default: |
| 1700 | ret = LTTNG_ERR_UNKNOWN_DOMAIN; |
| 1701 | goto end; |
| 1702 | } |
| 1703 | |
| 1704 | /* Only create a pid_tracker if enabled or untrack all */ |
| 1705 | if (nr_pids != 1 || (nr_pids == 1 && pids[0] != -1)) { |
| 1706 | ret = config_writer_open_element(writer, |
| 1707 | config_element_pid_tracker); |
| 1708 | if (ret) { |
| 1709 | ret = LTTNG_ERR_SAVE_IO_FAIL; |
| 1710 | goto end; |
| 1711 | } |
| 1712 | |
| 1713 | ret = config_writer_open_element(writer, |
| 1714 | config_element_targets); |
| 1715 | if (ret) { |
| 1716 | ret = LTTNG_ERR_SAVE_IO_FAIL; |
| 1717 | goto end; |
| 1718 | } |
| 1719 | |
| 1720 | for (i = 0; i < nr_pids; i++) { |
| 1721 | ret = config_writer_open_element(writer, |
| 1722 | config_element_target_pid); |
| 1723 | if (ret) { |
| 1724 | ret = LTTNG_ERR_SAVE_IO_FAIL; |
| 1725 | goto end; |
| 1726 | } |
| 1727 | |
| 1728 | ret = config_writer_write_element_unsigned_int(writer, |
| 1729 | config_element_pid, pids[i]); |
| 1730 | if (ret) { |
| 1731 | ret = LTTNG_ERR_SAVE_IO_FAIL; |
| 1732 | goto end; |
| 1733 | } |
| 1734 | |
| 1735 | /* /pid_target */ |
| 1736 | ret = config_writer_close_element(writer); |
| 1737 | if (ret) { |
| 1738 | ret = LTTNG_ERR_SAVE_IO_FAIL; |
| 1739 | goto end; |
| 1740 | } |
| 1741 | } |
| 1742 | |
| 1743 | /* /targets */ |
| 1744 | ret = config_writer_close_element(writer); |
| 1745 | if (ret) { |
| 1746 | ret = LTTNG_ERR_SAVE_IO_FAIL; |
| 1747 | goto end; |
| 1748 | } |
| 1749 | |
| 1750 | /* /pid_tracker */ |
| 1751 | ret = config_writer_close_element(writer); |
| 1752 | if (ret) { |
| 1753 | ret = LTTNG_ERR_SAVE_IO_FAIL; |
| 1754 | goto end; |
| 1755 | } |
| 1756 | } |
| 1757 | end: |
| 1758 | free(pids); |
| 1759 | return ret; |
| 1760 | } |
| 1761 | |
| 1762 | static |
| 1763 | int save_ust_domain(struct config_writer *writer, |
| 1764 | struct ltt_session *session, enum lttng_domain_type domain) |
| 1765 | { |
| 1766 | int ret; |
| 1767 | struct ltt_ust_channel *ust_chan; |
| 1768 | const char *buffer_type_string; |
| 1769 | struct lttng_ht_node_str *node; |
| 1770 | struct lttng_ht_iter iter; |
| 1771 | const char *config_domain_name; |
| 1772 | |
| 1773 | assert(writer); |
| 1774 | assert(session); |
| 1775 | |
| 1776 | ret = config_writer_open_element(writer, |
| 1777 | config_element_domain); |
| 1778 | if (ret) { |
| 1779 | ret = LTTNG_ERR_SAVE_IO_FAIL; |
| 1780 | goto end; |
| 1781 | } |
| 1782 | |
| 1783 | config_domain_name = get_config_domain_str(domain); |
| 1784 | if (!config_domain_name) { |
| 1785 | ret = LTTNG_ERR_INVALID; |
| 1786 | goto end; |
| 1787 | } |
| 1788 | |
| 1789 | ret = config_writer_write_element_string(writer, |
| 1790 | config_element_type, config_domain_name); |
| 1791 | if (ret) { |
| 1792 | ret = LTTNG_ERR_SAVE_IO_FAIL; |
| 1793 | goto end; |
| 1794 | } |
| 1795 | |
| 1796 | buffer_type_string = get_buffer_type_string( |
| 1797 | session->ust_session->buffer_type); |
| 1798 | if (!buffer_type_string) { |
| 1799 | ERR("Unsupported buffer type."); |
| 1800 | ret = LTTNG_ERR_INVALID; |
| 1801 | goto end; |
| 1802 | } |
| 1803 | |
| 1804 | ret = config_writer_write_element_string(writer, |
| 1805 | config_element_buffer_type, buffer_type_string); |
| 1806 | if (ret) { |
| 1807 | ret = LTTNG_ERR_SAVE_IO_FAIL; |
| 1808 | goto end; |
| 1809 | } |
| 1810 | |
| 1811 | ret = config_writer_open_element(writer, config_element_channels); |
| 1812 | if (ret) { |
| 1813 | ret = LTTNG_ERR_SAVE_IO_FAIL; |
| 1814 | goto end; |
| 1815 | } |
| 1816 | |
| 1817 | rcu_read_lock(); |
| 1818 | cds_lfht_for_each_entry(session->ust_session->domain_global.channels->ht, |
| 1819 | &iter.iter, node, node) { |
| 1820 | ust_chan = caa_container_of(node, struct ltt_ust_channel, node); |
| 1821 | if (domain == ust_chan->domain) { |
| 1822 | ret = save_ust_channel(writer, ust_chan, session->ust_session); |
| 1823 | if (ret) { |
| 1824 | rcu_read_unlock(); |
| 1825 | goto end; |
| 1826 | } |
| 1827 | } |
| 1828 | } |
| 1829 | rcu_read_unlock(); |
| 1830 | |
| 1831 | /* /channels */ |
| 1832 | ret = config_writer_close_element(writer); |
| 1833 | if (ret) { |
| 1834 | ret = LTTNG_ERR_SAVE_IO_FAIL; |
| 1835 | goto end; |
| 1836 | } |
| 1837 | |
| 1838 | if (domain == LTTNG_DOMAIN_UST) { |
| 1839 | ret = config_writer_open_element(writer, |
| 1840 | config_element_trackers); |
| 1841 | if (ret) { |
| 1842 | ret = LTTNG_ERR_SAVE_IO_FAIL; |
| 1843 | goto end; |
| 1844 | } |
| 1845 | |
| 1846 | ret = save_pid_tracker(writer, session, LTTNG_DOMAIN_UST); |
| 1847 | if (ret) { |
| 1848 | goto end; |
| 1849 | } |
| 1850 | |
| 1851 | /* /trackers */ |
| 1852 | ret = config_writer_close_element(writer); |
| 1853 | if (ret) { |
| 1854 | goto end; |
| 1855 | } |
| 1856 | } |
| 1857 | |
| 1858 | /* /domain */ |
| 1859 | ret = config_writer_close_element(writer); |
| 1860 | if (ret) { |
| 1861 | ret = LTTNG_ERR_SAVE_IO_FAIL; |
| 1862 | goto end; |
| 1863 | } |
| 1864 | |
| 1865 | end: |
| 1866 | return ret; |
| 1867 | } |
| 1868 | |
| 1869 | static |
| 1870 | int save_domains(struct config_writer *writer, struct ltt_session *session) |
| 1871 | { |
| 1872 | int ret = 0; |
| 1873 | |
| 1874 | assert(writer); |
| 1875 | assert(session); |
| 1876 | |
| 1877 | if (!session->kernel_session && !session->ust_session) { |
| 1878 | goto end; |
| 1879 | } |
| 1880 | |
| 1881 | ret = config_writer_open_element(writer, config_element_domains); |
| 1882 | if (ret) { |
| 1883 | ret = LTTNG_ERR_SAVE_IO_FAIL; |
| 1884 | goto end; |
| 1885 | } |
| 1886 | |
| 1887 | |
| 1888 | if (session->kernel_session) { |
| 1889 | ret = config_writer_open_element(writer, |
| 1890 | config_element_domain); |
| 1891 | if (ret) { |
| 1892 | ret = LTTNG_ERR_SAVE_IO_FAIL; |
| 1893 | goto end; |
| 1894 | } |
| 1895 | |
| 1896 | ret = save_kernel_session(writer, session); |
| 1897 | if (ret) { |
| 1898 | goto end; |
| 1899 | } |
| 1900 | |
| 1901 | ret = config_writer_open_element(writer, |
| 1902 | config_element_trackers); |
| 1903 | if (ret) { |
| 1904 | ret = LTTNG_ERR_SAVE_IO_FAIL; |
| 1905 | goto end; |
| 1906 | } |
| 1907 | |
| 1908 | ret = save_pid_tracker(writer, session, LTTNG_DOMAIN_KERNEL); |
| 1909 | if (ret) { |
| 1910 | goto end; |
| 1911 | } |
| 1912 | |
| 1913 | /* /trackers */ |
| 1914 | ret = config_writer_close_element(writer); |
| 1915 | if (ret) { |
| 1916 | ret = LTTNG_ERR_SAVE_IO_FAIL; |
| 1917 | goto end; |
| 1918 | } |
| 1919 | /* /domain */ |
| 1920 | ret = config_writer_close_element(writer); |
| 1921 | if (ret) { |
| 1922 | ret = LTTNG_ERR_SAVE_IO_FAIL; |
| 1923 | goto end; |
| 1924 | } |
| 1925 | } |
| 1926 | |
| 1927 | if (session->ust_session) { |
| 1928 | ret = save_ust_domain(writer, session, LTTNG_DOMAIN_UST); |
| 1929 | if (ret) { |
| 1930 | goto end; |
| 1931 | } |
| 1932 | |
| 1933 | ret = save_ust_domain(writer, session, LTTNG_DOMAIN_JUL); |
| 1934 | if (ret) { |
| 1935 | goto end; |
| 1936 | } |
| 1937 | |
| 1938 | ret = save_ust_domain(writer, session, LTTNG_DOMAIN_LOG4J); |
| 1939 | if (ret) { |
| 1940 | goto end; |
| 1941 | } |
| 1942 | |
| 1943 | ret = save_ust_domain(writer, session, LTTNG_DOMAIN_PYTHON); |
| 1944 | if (ret) { |
| 1945 | goto end; |
| 1946 | } |
| 1947 | } |
| 1948 | |
| 1949 | /* /domains */ |
| 1950 | ret = config_writer_close_element(writer); |
| 1951 | if (ret) { |
| 1952 | ret = LTTNG_ERR_SAVE_IO_FAIL; |
| 1953 | goto end; |
| 1954 | } |
| 1955 | end: |
| 1956 | return ret; |
| 1957 | } |
| 1958 | |
| 1959 | static |
| 1960 | int save_consumer_output(struct config_writer *writer, |
| 1961 | struct consumer_output *output) |
| 1962 | { |
| 1963 | int ret; |
| 1964 | |
| 1965 | assert(writer); |
| 1966 | assert(output); |
| 1967 | |
| 1968 | ret = config_writer_open_element(writer, config_element_consumer_output); |
| 1969 | if (ret) { |
| 1970 | ret = LTTNG_ERR_SAVE_IO_FAIL; |
| 1971 | goto end; |
| 1972 | } |
| 1973 | |
| 1974 | ret = config_writer_write_element_bool(writer, config_element_enabled, |
| 1975 | output->enabled); |
| 1976 | if (ret) { |
| 1977 | ret = LTTNG_ERR_SAVE_IO_FAIL; |
| 1978 | goto end; |
| 1979 | } |
| 1980 | |
| 1981 | ret = config_writer_open_element(writer, config_element_destination); |
| 1982 | if (ret) { |
| 1983 | ret = LTTNG_ERR_SAVE_IO_FAIL; |
| 1984 | goto end; |
| 1985 | } |
| 1986 | |
| 1987 | switch (output->type) { |
| 1988 | case CONSUMER_DST_LOCAL: |
| 1989 | ret = config_writer_write_element_string(writer, |
| 1990 | config_element_path, output->dst.session_root_path); |
| 1991 | if (ret) { |
| 1992 | ret = LTTNG_ERR_SAVE_IO_FAIL; |
| 1993 | goto end; |
| 1994 | } |
| 1995 | break; |
| 1996 | case CONSUMER_DST_NET: |
| 1997 | { |
| 1998 | char *uri; |
| 1999 | |
| 2000 | uri = zmalloc(PATH_MAX); |
| 2001 | if (!uri) { |
| 2002 | ret = LTTNG_ERR_NOMEM; |
| 2003 | goto end; |
| 2004 | } |
| 2005 | |
| 2006 | ret = config_writer_open_element(writer, config_element_net_output); |
| 2007 | if (ret) { |
| 2008 | ret = LTTNG_ERR_SAVE_IO_FAIL; |
| 2009 | goto end_net_output; |
| 2010 | } |
| 2011 | |
| 2012 | if (output->dst.net.control_isset && |
| 2013 | output->dst.net.data_isset) { |
| 2014 | ret = uri_to_str_url(&output->dst.net.control, uri, PATH_MAX); |
| 2015 | if (ret < 0) { |
| 2016 | ret = LTTNG_ERR_INVALID; |
| 2017 | goto end_net_output; |
| 2018 | } |
| 2019 | |
| 2020 | ret = config_writer_write_element_string(writer, |
| 2021 | config_element_control_uri, uri); |
| 2022 | if (ret) { |
| 2023 | ret = LTTNG_ERR_SAVE_IO_FAIL; |
| 2024 | goto end_net_output; |
| 2025 | } |
| 2026 | |
| 2027 | ret = uri_to_str_url(&output->dst.net.data, uri, PATH_MAX); |
| 2028 | if (ret < 0) { |
| 2029 | ret = LTTNG_ERR_INVALID; |
| 2030 | goto end_net_output; |
| 2031 | } |
| 2032 | |
| 2033 | ret = config_writer_write_element_string(writer, |
| 2034 | config_element_data_uri, uri); |
| 2035 | if (ret) { |
| 2036 | ret = LTTNG_ERR_SAVE_IO_FAIL; |
| 2037 | goto end_net_output; |
| 2038 | } |
| 2039 | |
| 2040 | end_net_output: |
| 2041 | free(uri); |
| 2042 | if (ret) { |
| 2043 | goto end; |
| 2044 | } |
| 2045 | } else { |
| 2046 | ret = !output->dst.net.control_isset ? |
| 2047 | LTTNG_ERR_URL_CTRL_MISS : |
| 2048 | LTTNG_ERR_URL_DATA_MISS; |
| 2049 | free(uri); |
| 2050 | goto end; |
| 2051 | } |
| 2052 | |
| 2053 | ret = config_writer_close_element(writer); |
| 2054 | if (ret) { |
| 2055 | ret = LTTNG_ERR_SAVE_IO_FAIL; |
| 2056 | goto end; |
| 2057 | } |
| 2058 | break; |
| 2059 | } |
| 2060 | default: |
| 2061 | ERR("Unsupported consumer output type."); |
| 2062 | ret = LTTNG_ERR_INVALID; |
| 2063 | goto end; |
| 2064 | } |
| 2065 | |
| 2066 | /* /destination */ |
| 2067 | ret = config_writer_close_element(writer); |
| 2068 | if (ret) { |
| 2069 | ret = LTTNG_ERR_SAVE_IO_FAIL; |
| 2070 | goto end; |
| 2071 | } |
| 2072 | |
| 2073 | /* /consumer_output */ |
| 2074 | ret = config_writer_close_element(writer); |
| 2075 | if (ret) { |
| 2076 | ret = LTTNG_ERR_SAVE_IO_FAIL; |
| 2077 | goto end; |
| 2078 | } |
| 2079 | end: |
| 2080 | return ret; |
| 2081 | } |
| 2082 | |
| 2083 | static |
| 2084 | int save_snapshot_outputs(struct config_writer *writer, |
| 2085 | struct snapshot *snapshot) |
| 2086 | { |
| 2087 | int ret; |
| 2088 | struct lttng_ht_iter iter; |
| 2089 | struct snapshot_output *output; |
| 2090 | |
| 2091 | assert(writer); |
| 2092 | assert(snapshot); |
| 2093 | |
| 2094 | ret = config_writer_open_element(writer, config_element_snapshot_outputs); |
| 2095 | if (ret) { |
| 2096 | ret = LTTNG_ERR_SAVE_IO_FAIL; |
| 2097 | goto end; |
| 2098 | } |
| 2099 | |
| 2100 | rcu_read_lock(); |
| 2101 | cds_lfht_for_each_entry(snapshot->output_ht->ht, &iter.iter, output, |
| 2102 | node.node) { |
| 2103 | ret = config_writer_open_element(writer, |
| 2104 | config_element_output); |
| 2105 | if (ret) { |
| 2106 | ret = LTTNG_ERR_SAVE_IO_FAIL; |
| 2107 | goto end_unlock; |
| 2108 | } |
| 2109 | |
| 2110 | ret = config_writer_write_element_string(writer, |
| 2111 | config_element_name, output->name); |
| 2112 | if (ret) { |
| 2113 | ret = LTTNG_ERR_SAVE_IO_FAIL; |
| 2114 | goto end_unlock; |
| 2115 | } |
| 2116 | |
| 2117 | ret = config_writer_write_element_unsigned_int(writer, |
| 2118 | config_element_max_size, output->max_size); |
| 2119 | if (ret) { |
| 2120 | ret = LTTNG_ERR_SAVE_IO_FAIL; |
| 2121 | goto end_unlock; |
| 2122 | } |
| 2123 | |
| 2124 | ret = save_consumer_output(writer, output->consumer); |
| 2125 | if (ret) { |
| 2126 | goto end_unlock; |
| 2127 | } |
| 2128 | |
| 2129 | /* /output */ |
| 2130 | ret = config_writer_close_element(writer); |
| 2131 | if (ret) { |
| 2132 | ret = LTTNG_ERR_SAVE_IO_FAIL; |
| 2133 | goto end_unlock; |
| 2134 | } |
| 2135 | } |
| 2136 | rcu_read_unlock(); |
| 2137 | |
| 2138 | /* /snapshot_outputs */ |
| 2139 | ret = config_writer_close_element(writer); |
| 2140 | if (ret) { |
| 2141 | ret = LTTNG_ERR_SAVE_IO_FAIL; |
| 2142 | goto end; |
| 2143 | } |
| 2144 | |
| 2145 | end: |
| 2146 | return ret; |
| 2147 | end_unlock: |
| 2148 | rcu_read_unlock(); |
| 2149 | return ret; |
| 2150 | } |
| 2151 | |
| 2152 | static |
| 2153 | int save_session_output(struct config_writer *writer, |
| 2154 | struct ltt_session *session) |
| 2155 | { |
| 2156 | int ret; |
| 2157 | |
| 2158 | assert(writer); |
| 2159 | assert(session); |
| 2160 | |
| 2161 | if ((session->snapshot_mode && session->snapshot.nb_output == 0) || |
| 2162 | (!session->snapshot_mode && !session->consumer)) { |
| 2163 | /* Session is in no output mode */ |
| 2164 | ret = 0; |
| 2165 | goto end; |
| 2166 | } |
| 2167 | |
| 2168 | ret = config_writer_open_element(writer, config_element_output); |
| 2169 | if (ret) { |
| 2170 | ret = LTTNG_ERR_SAVE_IO_FAIL; |
| 2171 | goto end; |
| 2172 | } |
| 2173 | |
| 2174 | if (session->snapshot_mode) { |
| 2175 | ret = save_snapshot_outputs(writer, &session->snapshot); |
| 2176 | if (ret) { |
| 2177 | goto end; |
| 2178 | } |
| 2179 | } else { |
| 2180 | if (session->consumer) { |
| 2181 | ret = save_consumer_output(writer, session->consumer); |
| 2182 | if (ret) { |
| 2183 | goto end; |
| 2184 | } |
| 2185 | } |
| 2186 | } |
| 2187 | |
| 2188 | /* /output */ |
| 2189 | ret = config_writer_close_element(writer); |
| 2190 | if (ret) { |
| 2191 | ret = LTTNG_ERR_SAVE_IO_FAIL; |
| 2192 | goto end; |
| 2193 | } |
| 2194 | end: |
| 2195 | return ret; |
| 2196 | } |
| 2197 | |
| 2198 | static |
| 2199 | int save_session_rotation_schedule(struct config_writer *writer, |
| 2200 | enum lttng_rotation_schedule_type type, uint64_t value) |
| 2201 | { |
| 2202 | int ret = 0; |
| 2203 | const char *element_name; |
| 2204 | const char *value_name; |
| 2205 | |
| 2206 | switch (type) { |
| 2207 | case LTTNG_ROTATION_SCHEDULE_TYPE_PERIODIC: |
| 2208 | element_name = config_element_rotation_schedule_periodic; |
| 2209 | value_name = config_element_rotation_schedule_periodic_time_us; |
| 2210 | break; |
| 2211 | case LTTNG_ROTATION_SCHEDULE_TYPE_SIZE_THRESHOLD: |
| 2212 | element_name = config_element_rotation_schedule_size_threshold; |
| 2213 | value_name = config_element_rotation_schedule_size_threshold_bytes; |
| 2214 | break; |
| 2215 | default: |
| 2216 | ret = -1; |
| 2217 | goto end; |
| 2218 | } |
| 2219 | |
| 2220 | ret = config_writer_open_element(writer, element_name); |
| 2221 | if (ret) { |
| 2222 | goto end; |
| 2223 | } |
| 2224 | |
| 2225 | ret = config_writer_write_element_unsigned_int(writer, |
| 2226 | value_name, value); |
| 2227 | if (ret) { |
| 2228 | goto end; |
| 2229 | } |
| 2230 | |
| 2231 | /* Close schedule descriptor element. */ |
| 2232 | ret = config_writer_close_element(writer); |
| 2233 | if (ret) { |
| 2234 | goto end; |
| 2235 | } |
| 2236 | end: |
| 2237 | return ret; |
| 2238 | } |
| 2239 | |
| 2240 | static |
| 2241 | int save_session_rotation_schedules(struct config_writer *writer, |
| 2242 | struct ltt_session *session) |
| 2243 | { |
| 2244 | int ret; |
| 2245 | |
| 2246 | ret = config_writer_open_element(writer, |
| 2247 | config_element_rotation_schedules); |
| 2248 | if (ret) { |
| 2249 | goto end; |
| 2250 | } |
| 2251 | if (session->rotate_timer_period) { |
| 2252 | ret = save_session_rotation_schedule(writer, |
| 2253 | LTTNG_ROTATION_SCHEDULE_TYPE_PERIODIC, |
| 2254 | session->rotate_timer_period); |
| 2255 | if (ret) { |
| 2256 | goto close_schedules; |
| 2257 | } |
| 2258 | } |
| 2259 | if (session->rotate_size) { |
| 2260 | ret = save_session_rotation_schedule(writer, |
| 2261 | LTTNG_ROTATION_SCHEDULE_TYPE_SIZE_THRESHOLD, |
| 2262 | session->rotate_size); |
| 2263 | if (ret) { |
| 2264 | goto close_schedules; |
| 2265 | } |
| 2266 | } |
| 2267 | |
| 2268 | close_schedules: |
| 2269 | /* Close rotation schedules element. */ |
| 2270 | ret = config_writer_close_element(writer); |
| 2271 | if (ret) { |
| 2272 | goto end; |
| 2273 | } |
| 2274 | end: |
| 2275 | return ret; |
| 2276 | } |
| 2277 | |
| 2278 | /* |
| 2279 | * Save the given session. |
| 2280 | * |
| 2281 | * Return 0 on success else a LTTNG_ERR* code. |
| 2282 | */ |
| 2283 | static |
| 2284 | int save_session(struct ltt_session *session, |
| 2285 | struct lttng_save_session_attr *attr, lttng_sock_cred *creds) |
| 2286 | { |
| 2287 | int ret, fd = -1; |
| 2288 | char config_file_path[LTTNG_PATH_MAX]; |
| 2289 | size_t len; |
| 2290 | struct config_writer *writer = NULL; |
| 2291 | size_t session_name_len; |
| 2292 | const char *provided_path; |
| 2293 | |
| 2294 | assert(session); |
| 2295 | assert(attr); |
| 2296 | assert(creds); |
| 2297 | |
| 2298 | session_name_len = strlen(session->name); |
| 2299 | memset(config_file_path, 0, sizeof(config_file_path)); |
| 2300 | |
| 2301 | if (!session_access_ok(session, |
| 2302 | LTTNG_SOCK_GET_UID_CRED(creds), |
| 2303 | LTTNG_SOCK_GET_GID_CRED(creds)) || session->destroyed) { |
| 2304 | ret = LTTNG_ERR_EPERM; |
| 2305 | goto end; |
| 2306 | } |
| 2307 | |
| 2308 | provided_path = lttng_save_session_attr_get_output_url(attr); |
| 2309 | if (provided_path) { |
| 2310 | DBG3("Save session in provided path %s", provided_path); |
| 2311 | len = strlen(provided_path); |
| 2312 | if (len >= sizeof(config_file_path)) { |
| 2313 | ret = LTTNG_ERR_SET_URL; |
| 2314 | goto end; |
| 2315 | } |
| 2316 | strncpy(config_file_path, provided_path, sizeof(config_file_path)); |
| 2317 | } else { |
| 2318 | ssize_t ret_len; |
| 2319 | char *home_dir = utils_get_user_home_dir( |
| 2320 | LTTNG_SOCK_GET_UID_CRED(creds)); |
| 2321 | if (!home_dir) { |
| 2322 | ret = LTTNG_ERR_SET_URL; |
| 2323 | goto end; |
| 2324 | } |
| 2325 | |
| 2326 | ret_len = snprintf(config_file_path, sizeof(config_file_path), |
| 2327 | DEFAULT_SESSION_HOME_CONFIGPATH, home_dir); |
| 2328 | free(home_dir); |
| 2329 | if (ret_len < 0) { |
| 2330 | PERROR("snprintf save session"); |
| 2331 | ret = LTTNG_ERR_SET_URL; |
| 2332 | goto end; |
| 2333 | } |
| 2334 | len = ret_len; |
| 2335 | } |
| 2336 | |
| 2337 | /* |
| 2338 | * Check the path fits in the config file path dst including the '/' |
| 2339 | * followed by trailing .lttng extension and the NULL terminated string. |
| 2340 | */ |
| 2341 | if ((len + session_name_len + 2 + |
| 2342 | sizeof(DEFAULT_SESSION_CONFIG_FILE_EXTENSION)) |
| 2343 | > sizeof(config_file_path)) { |
| 2344 | ret = LTTNG_ERR_SET_URL; |
| 2345 | goto end; |
| 2346 | } |
| 2347 | |
| 2348 | ret = run_as_mkdir_recursive(config_file_path, S_IRWXU | S_IRWXG, |
| 2349 | LTTNG_SOCK_GET_UID_CRED(creds), LTTNG_SOCK_GET_GID_CRED(creds)); |
| 2350 | if (ret) { |
| 2351 | ret = LTTNG_ERR_SET_URL; |
| 2352 | goto end; |
| 2353 | } |
| 2354 | |
| 2355 | /* |
| 2356 | * At this point, we know that everything fits in the buffer. Validation |
| 2357 | * was done just above. |
| 2358 | */ |
| 2359 | config_file_path[len++] = '/'; |
| 2360 | strncpy(config_file_path + len, session->name, sizeof(config_file_path) - len); |
| 2361 | len += session_name_len; |
| 2362 | strcpy(config_file_path + len, DEFAULT_SESSION_CONFIG_FILE_EXTENSION); |
| 2363 | len += sizeof(DEFAULT_SESSION_CONFIG_FILE_EXTENSION); |
| 2364 | config_file_path[len] = '\0'; |
| 2365 | |
| 2366 | if (!access(config_file_path, F_OK) && !attr->overwrite) { |
| 2367 | /* File exists, notify the user since the overwrite flag is off. */ |
| 2368 | ret = LTTNG_ERR_SAVE_FILE_EXIST; |
| 2369 | goto end; |
| 2370 | } |
| 2371 | |
| 2372 | fd = run_as_open(config_file_path, O_CREAT | O_WRONLY | O_TRUNC, |
| 2373 | S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP, |
| 2374 | LTTNG_SOCK_GET_UID_CRED(creds), LTTNG_SOCK_GET_GID_CRED(creds)); |
| 2375 | if (fd < 0) { |
| 2376 | PERROR("Could not create configuration file"); |
| 2377 | ret = LTTNG_ERR_SAVE_IO_FAIL; |
| 2378 | goto end; |
| 2379 | } |
| 2380 | |
| 2381 | writer = config_writer_create(fd, 1); |
| 2382 | if (!writer) { |
| 2383 | ret = LTTNG_ERR_NOMEM; |
| 2384 | goto end; |
| 2385 | } |
| 2386 | |
| 2387 | ret = config_writer_open_element(writer, config_element_sessions); |
| 2388 | if (ret) { |
| 2389 | ret = LTTNG_ERR_SAVE_IO_FAIL; |
| 2390 | goto end; |
| 2391 | } |
| 2392 | |
| 2393 | ret = config_writer_open_element(writer, config_element_session); |
| 2394 | if (ret) { |
| 2395 | ret = LTTNG_ERR_SAVE_IO_FAIL; |
| 2396 | goto end; |
| 2397 | } |
| 2398 | |
| 2399 | ret = config_writer_write_element_string(writer, config_element_name, |
| 2400 | session->name); |
| 2401 | if (ret) { |
| 2402 | ret = LTTNG_ERR_SAVE_IO_FAIL; |
| 2403 | goto end; |
| 2404 | } |
| 2405 | |
| 2406 | if(session->shm_path[0] != '\0') { |
| 2407 | ret = config_writer_write_element_string(writer, |
| 2408 | config_element_shared_memory_path, |
| 2409 | session->shm_path); |
| 2410 | if (ret) { |
| 2411 | ret = LTTNG_ERR_SAVE_IO_FAIL; |
| 2412 | goto end; |
| 2413 | } |
| 2414 | } |
| 2415 | |
| 2416 | ret = save_domains(writer, session); |
| 2417 | if (ret) { |
| 2418 | goto end; |
| 2419 | } |
| 2420 | |
| 2421 | ret = config_writer_write_element_bool(writer, config_element_started, |
| 2422 | session->active); |
| 2423 | if (ret) { |
| 2424 | ret = LTTNG_ERR_SAVE_IO_FAIL; |
| 2425 | goto end; |
| 2426 | } |
| 2427 | |
| 2428 | if (session->snapshot_mode || session->live_timer || |
| 2429 | session->rotate_timer_period || session->rotate_size) { |
| 2430 | ret = config_writer_open_element(writer, config_element_attributes); |
| 2431 | if (ret) { |
| 2432 | ret = LTTNG_ERR_SAVE_IO_FAIL; |
| 2433 | goto end; |
| 2434 | } |
| 2435 | |
| 2436 | if (session->snapshot_mode) { |
| 2437 | ret = config_writer_write_element_bool(writer, |
| 2438 | config_element_snapshot_mode, 1); |
| 2439 | if (ret) { |
| 2440 | ret = LTTNG_ERR_SAVE_IO_FAIL; |
| 2441 | goto end; |
| 2442 | } |
| 2443 | } else if (session->live_timer) { |
| 2444 | ret = config_writer_write_element_unsigned_int(writer, |
| 2445 | config_element_live_timer_interval, session->live_timer); |
| 2446 | if (ret) { |
| 2447 | ret = LTTNG_ERR_SAVE_IO_FAIL; |
| 2448 | goto end; |
| 2449 | } |
| 2450 | } |
| 2451 | if (session->rotate_timer_period || session->rotate_size) { |
| 2452 | ret = save_session_rotation_schedules(writer, |
| 2453 | session); |
| 2454 | if (ret) { |
| 2455 | ret = LTTNG_ERR_SAVE_IO_FAIL; |
| 2456 | goto end; |
| 2457 | } |
| 2458 | } |
| 2459 | |
| 2460 | /* /attributes */ |
| 2461 | ret = config_writer_close_element(writer); |
| 2462 | if (ret) { |
| 2463 | ret = LTTNG_ERR_SAVE_IO_FAIL; |
| 2464 | goto end; |
| 2465 | } |
| 2466 | } |
| 2467 | |
| 2468 | ret = save_session_output(writer, session); |
| 2469 | if (ret) { |
| 2470 | goto end; |
| 2471 | } |
| 2472 | |
| 2473 | /* /session */ |
| 2474 | ret = config_writer_close_element(writer); |
| 2475 | if (ret) { |
| 2476 | ret = LTTNG_ERR_SAVE_IO_FAIL; |
| 2477 | goto end; |
| 2478 | } |
| 2479 | |
| 2480 | /* /sessions */ |
| 2481 | ret = config_writer_close_element(writer); |
| 2482 | if (ret) { |
| 2483 | ret = LTTNG_ERR_SAVE_IO_FAIL; |
| 2484 | goto end; |
| 2485 | } |
| 2486 | end: |
| 2487 | if (writer && config_writer_destroy(writer)) { |
| 2488 | /* Preserve the original error code */ |
| 2489 | ret = ret ? ret : LTTNG_ERR_SAVE_IO_FAIL; |
| 2490 | } |
| 2491 | if (ret) { |
| 2492 | /* Delete file in case of error */ |
| 2493 | if ((fd >= 0) && unlink(config_file_path)) { |
| 2494 | PERROR("Unlinking XML session configuration."); |
| 2495 | } |
| 2496 | } |
| 2497 | |
| 2498 | if (fd >= 0) { |
| 2499 | ret = close(fd); |
| 2500 | if (ret) { |
| 2501 | PERROR("Closing XML session configuration"); |
| 2502 | } |
| 2503 | } |
| 2504 | |
| 2505 | return ret; |
| 2506 | } |
| 2507 | |
| 2508 | int cmd_save_sessions(struct lttng_save_session_attr *attr, |
| 2509 | lttng_sock_cred *creds) |
| 2510 | { |
| 2511 | int ret; |
| 2512 | const char *session_name; |
| 2513 | struct ltt_session *session; |
| 2514 | |
| 2515 | session_lock_list(); |
| 2516 | |
| 2517 | session_name = lttng_save_session_attr_get_session_name(attr); |
| 2518 | if (session_name) { |
| 2519 | session = session_find_by_name(session_name); |
| 2520 | if (!session) { |
| 2521 | ret = LTTNG_ERR_SESS_NOT_FOUND; |
| 2522 | goto end; |
| 2523 | } |
| 2524 | |
| 2525 | session_lock(session); |
| 2526 | ret = save_session(session, attr, creds); |
| 2527 | session_unlock(session); |
| 2528 | session_put(session); |
| 2529 | if (ret) { |
| 2530 | goto end; |
| 2531 | } |
| 2532 | } else { |
| 2533 | struct ltt_session_list *list = session_get_list(); |
| 2534 | |
| 2535 | cds_list_for_each_entry(session, &list->head, list) { |
| 2536 | if (!session_get(session)) { |
| 2537 | continue; |
| 2538 | } |
| 2539 | session_lock(session); |
| 2540 | ret = save_session(session, attr, creds); |
| 2541 | session_unlock(session); |
| 2542 | session_put(session); |
| 2543 | /* Don't abort if we don't have the required permissions. */ |
| 2544 | if (ret && ret != LTTNG_ERR_EPERM) { |
| 2545 | goto end; |
| 2546 | } |
| 2547 | } |
| 2548 | } |
| 2549 | ret = LTTNG_OK; |
| 2550 | |
| 2551 | end: |
| 2552 | session_unlock_list(); |
| 2553 | return ret; |
| 2554 | } |