1 /* SPDX-License-Identifier: GPL-2.0 */ 2 /* 3 * Stage 1 of the trace events. 4 * 5 * Override the macros in the event tracepoint header <trace/events/XXX.h> 6 * to include the following: 7 * 8 * struct trace_event_raw_<call> { 9 * struct trace_entry ent; 10 * <type> <item>; 11 * <type2> <item2>[<len>]; 12 * [...] 13 * }; 14 * 15 * The <type> <item> is created by the __field(type, item) macro or 16 * the __array(type2, item2, len) macro. 17 * We simply do "type item;", and that will create the fields 18 * in the structure. 19 */ 20 21 #include <linux/trace_events.h> 22 23 #ifndef TRACE_SYSTEM_VAR 24 #define TRACE_SYSTEM_VAR TRACE_SYSTEM 25 #endif 26 27 #define __app__(x, y) str__##x##y 28 #define __app(x, y) __app__(x, y) 29 30 #define TRACE_SYSTEM_STRING __app(TRACE_SYSTEM_VAR,__trace_system_name) 31 32 #define TRACE_MAKE_SYSTEM_STR() \ 33 static const char TRACE_SYSTEM_STRING[] = \ 34 __stringify(TRACE_SYSTEM) 35 36 TRACE_MAKE_SYSTEM_STR(); 37 38 #undef TRACE_DEFINE_ENUM 39 #define TRACE_DEFINE_ENUM(a) \ 40 static struct trace_eval_map __used __initdata \ 41 __##TRACE_SYSTEM##_##a = \ 42 { \ 43 .system = TRACE_SYSTEM_STRING, \ 44 .eval_string = #a, \ 45 .eval_value = a \ 46 }; \ 47 static struct trace_eval_map __used \ 48 __section("_ftrace_eval_map") \ 49 *TRACE_SYSTEM##_##a = &__##TRACE_SYSTEM##_##a 50 51 #undef TRACE_DEFINE_SIZEOF 52 #define TRACE_DEFINE_SIZEOF(a) \ 53 static struct trace_eval_map __used __initdata \ 54 __##TRACE_SYSTEM##_##a = \ 55 { \ 56 .system = TRACE_SYSTEM_STRING, \ 57 .eval_string = "sizeof(" #a ")", \ 58 .eval_value = sizeof(a) \ 59 }; \ 60 static struct trace_eval_map __used \ 61 __section("_ftrace_eval_map") \ 62 *TRACE_SYSTEM##_##a = &__##TRACE_SYSTEM##_##a 63 64 /* 65 * DECLARE_EVENT_CLASS can be used to add a generic function 66 * handlers for events. That is, if all events have the same 67 * parameters and just have distinct trace points. 68 * Each tracepoint can be defined with DEFINE_EVENT and that 69 * will map the DECLARE_EVENT_CLASS to the tracepoint. 70 * 71 * TRACE_EVENT is a one to one mapping between tracepoint and template. 72 */ 73 #undef TRACE_EVENT 74 #define TRACE_EVENT(name, proto, args, tstruct, assign, print) \ 75 DECLARE_EVENT_CLASS(name, \ 76 PARAMS(proto), \ 77 PARAMS(args), \ 78 PARAMS(tstruct), \ 79 PARAMS(assign), \ 80 PARAMS(print)); \ 81 DEFINE_EVENT(name, name, PARAMS(proto), PARAMS(args)); 82 83 84 #undef __field 85 #define __field(type, item) type item; 86 87 #undef __field_ext 88 #define __field_ext(type, item, filter_type) type item; 89 90 #undef __field_struct 91 #define __field_struct(type, item) type item; 92 93 #undef __field_struct_ext 94 #define __field_struct_ext(type, item, filter_type) type item; 95 96 #undef __array 97 #define __array(type, item, len) type item[len]; 98 99 #undef __dynamic_array 100 #define __dynamic_array(type, item, len) u32 __data_loc_##item; 101 102 #undef __string 103 #define __string(item, src) __dynamic_array(char, item, -1) 104 105 #undef __string_len 106 #define __string_len(item, src, len) __dynamic_array(char, item, -1) 107 108 #undef __bitmask 109 #define __bitmask(item, nr_bits) __dynamic_array(char, item, -1) 110 111 #undef __sockaddr 112 #define __sockaddr(field, len) __dynamic_array(u8, field, len) 113 114 #undef __rel_dynamic_array 115 #define __rel_dynamic_array(type, item, len) u32 __rel_loc_##item; 116 117 #undef __rel_string 118 #define __rel_string(item, src) __rel_dynamic_array(char, item, -1) 119 120 #undef __rel_string_len 121 #define __rel_string_len(item, src, len) __rel_dynamic_array(char, item, -1) 122 123 #undef __rel_bitmask 124 #define __rel_bitmask(item, nr_bits) __rel_dynamic_array(char, item, -1) 125 126 #undef __rel_sockaddr 127 #define __rel_sockaddr(field, len) __rel_dynamic_array(u8, field, len) 128 129 #undef TP_STRUCT__entry 130 #define TP_STRUCT__entry(args...) args 131 132 #undef DECLARE_EVENT_CLASS 133 #define DECLARE_EVENT_CLASS(name, proto, args, tstruct, assign, print) \ 134 struct trace_event_raw_##name { \ 135 struct trace_entry ent; \ 136 tstruct \ 137 char __data[]; \ 138 }; \ 139 \ 140 static struct trace_event_class event_class_##name; 141 142 #undef DEFINE_EVENT 143 #define DEFINE_EVENT(template, name, proto, args) \ 144 static struct trace_event_call __used \ 145 __attribute__((__aligned__(4))) event_##name 146 147 #undef DEFINE_EVENT_FN 148 #define DEFINE_EVENT_FN(template, name, proto, args, reg, unreg) \ 149 DEFINE_EVENT(template, name, PARAMS(proto), PARAMS(args)) 150 151 #undef DEFINE_EVENT_PRINT 152 #define DEFINE_EVENT_PRINT(template, name, proto, args, print) \ 153 DEFINE_EVENT(template, name, PARAMS(proto), PARAMS(args)) 154 155 /* Callbacks are meaningless to ftrace. */ 156 #undef TRACE_EVENT_FN 157 #define TRACE_EVENT_FN(name, proto, args, tstruct, \ 158 assign, print, reg, unreg) \ 159 TRACE_EVENT(name, PARAMS(proto), PARAMS(args), \ 160 PARAMS(tstruct), PARAMS(assign), PARAMS(print)) \ 161 162 #undef TRACE_EVENT_FN_COND 163 #define TRACE_EVENT_FN_COND(name, proto, args, cond, tstruct, \ 164 assign, print, reg, unreg) \ 165 TRACE_EVENT_CONDITION(name, PARAMS(proto), PARAMS(args), PARAMS(cond), \ 166 PARAMS(tstruct), PARAMS(assign), PARAMS(print)) \ 167 168 #undef TRACE_EVENT_FLAGS 169 #define TRACE_EVENT_FLAGS(name, value) \ 170 __TRACE_EVENT_FLAGS(name, value) 171 172 #undef TRACE_EVENT_PERF_PERM 173 #define TRACE_EVENT_PERF_PERM(name, expr...) \ 174 __TRACE_EVENT_PERF_PERM(name, expr) 175 176 #include TRACE_INCLUDE(TRACE_INCLUDE_FILE) 177 178 /* 179 * Stage 2 of the trace events. 180 * 181 * Include the following: 182 * 183 * struct trace_event_data_offsets_<call> { 184 * u32 <item1>; 185 * u32 <item2>; 186 * [...] 187 * }; 188 * 189 * The __dynamic_array() macro will create each u32 <item>, this is 190 * to keep the offset of each array from the beginning of the event. 191 * The size of an array is also encoded, in the higher 16 bits of <item>. 192 */ 193 194 #undef TRACE_DEFINE_ENUM 195 #define TRACE_DEFINE_ENUM(a) 196 197 #undef TRACE_DEFINE_SIZEOF 198 #define TRACE_DEFINE_SIZEOF(a) 199 200 #undef __field 201 #define __field(type, item) 202 203 #undef __field_ext 204 #define __field_ext(type, item, filter_type) 205 206 #undef __field_struct 207 #define __field_struct(type, item) 208 209 #undef __field_struct_ext 210 #define __field_struct_ext(type, item, filter_type) 211 212 #undef __array 213 #define __array(type, item, len) 214 215 #undef __dynamic_array 216 #define __dynamic_array(type, item, len) u32 item; 217 218 #undef __string 219 #define __string(item, src) __dynamic_array(char, item, -1) 220 221 #undef __string_len 222 #define __string_len(item, src, len) __dynamic_array(char, item, -1) 223 224 #undef __bitmask 225 #define __bitmask(item, nr_bits) __dynamic_array(unsigned long, item, -1) 226 227 #undef __sockaddr 228 #define __sockaddr(field, len) __dynamic_array(u8, field, len) 229 230 #undef __rel_dynamic_array 231 #define __rel_dynamic_array(type, item, len) u32 item; 232 233 #undef __rel_string 234 #define __rel_string(item, src) __rel_dynamic_array(char, item, -1) 235 236 #undef __rel_string_len 237 #define __rel_string_len(item, src, len) __rel_dynamic_array(char, item, -1) 238 239 #undef __rel_bitmask 240 #define __rel_bitmask(item, nr_bits) __rel_dynamic_array(unsigned long, item, -1) 241 242 #undef __rel_sockaddr 243 #define __rel_sockaddr(field, len) __rel_dynamic_array(u8, field, len) 244 245 #undef DECLARE_EVENT_CLASS 246 #define DECLARE_EVENT_CLASS(call, proto, args, tstruct, assign, print) \ 247 struct trace_event_data_offsets_##call { \ 248 tstruct; \ 249 }; 250 251 #undef DEFINE_EVENT 252 #define DEFINE_EVENT(template, name, proto, args) 253 254 #undef DEFINE_EVENT_PRINT 255 #define DEFINE_EVENT_PRINT(template, name, proto, args, print) 256 257 #undef TRACE_EVENT_FLAGS 258 #define TRACE_EVENT_FLAGS(event, flag) 259 260 #undef TRACE_EVENT_PERF_PERM 261 #define TRACE_EVENT_PERF_PERM(event, expr...) 262 263 #include TRACE_INCLUDE(TRACE_INCLUDE_FILE) 264 265 /* 266 * Stage 3 of the trace events. 267 * 268 * Override the macros in the event tracepoint header <trace/events/XXX.h> 269 * to include the following: 270 * 271 * enum print_line_t 272 * trace_raw_output_<call>(struct trace_iterator *iter, int flags) 273 * { 274 * struct trace_seq *s = &iter->seq; 275 * struct trace_event_raw_<call> *field; <-- defined in stage 1 276 * struct trace_seq *p = &iter->tmp_seq; 277 * 278 * -------(for event)------- 279 * 280 * struct trace_entry *entry; 281 * 282 * entry = iter->ent; 283 * 284 * if (entry->type != event_<call>->event.type) { 285 * WARN_ON_ONCE(1); 286 * return TRACE_TYPE_UNHANDLED; 287 * } 288 * 289 * field = (typeof(field))entry; 290 * 291 * trace_seq_init(p); 292 * return trace_output_call(iter, <call>, <TP_printk> "\n"); 293 * 294 * ------(or, for event class)------ 295 * 296 * int ret; 297 * 298 * field = (typeof(field))iter->ent; 299 * 300 * ret = trace_raw_output_prep(iter, trace_event); 301 * if (ret != TRACE_TYPE_HANDLED) 302 * return ret; 303 * 304 * trace_event_printf(iter, <TP_printk> "\n"); 305 * 306 * return trace_handle_return(s); 307 * ------- 308 * } 309 * 310 * This is the method used to print the raw event to the trace 311 * output format. Note, this is not needed if the data is read 312 * in binary. 313 */ 314 315 #undef __entry 316 #define __entry field 317 318 #undef TP_printk 319 #define TP_printk(fmt, args...) fmt "\n", args 320 321 #undef __get_dynamic_array 322 #define __get_dynamic_array(field) \ 323 ((void *)__entry + (__entry->__data_loc_##field & 0xffff)) 324 325 #undef __get_dynamic_array_len 326 #define __get_dynamic_array_len(field) \ 327 ((__entry->__data_loc_##field >> 16) & 0xffff) 328 329 #undef __get_str 330 #define __get_str(field) ((char *)__get_dynamic_array(field)) 331 332 #undef __get_rel_dynamic_array 333 #define __get_rel_dynamic_array(field) \ 334 ((void *)__entry + \ 335 offsetof(typeof(*__entry), __rel_loc_##field) + \ 336 sizeof(__entry->__rel_loc_##field) + \ 337 (__entry->__rel_loc_##field & 0xffff)) 338 339 #undef __get_rel_dynamic_array_len 340 #define __get_rel_dynamic_array_len(field) \ 341 ((__entry->__rel_loc_##field >> 16) & 0xffff) 342 343 #undef __get_rel_str 344 #define __get_rel_str(field) ((char *)__get_rel_dynamic_array(field)) 345 346 #undef __get_bitmask 347 #define __get_bitmask(field) \ 348 ({ \ 349 void *__bitmask = __get_dynamic_array(field); \ 350 unsigned int __bitmask_size; \ 351 __bitmask_size = __get_dynamic_array_len(field); \ 352 trace_print_bitmask_seq(p, __bitmask, __bitmask_size); \ 353 }) 354 355 #undef __get_rel_bitmask 356 #define __get_rel_bitmask(field) \ 357 ({ \ 358 void *__bitmask = __get_rel_dynamic_array(field); \ 359 unsigned int __bitmask_size; \ 360 __bitmask_size = __get_rel_dynamic_array_len(field); \ 361 trace_print_bitmask_seq(p, __bitmask, __bitmask_size); \ 362 }) 363 364 #undef __get_sockaddr 365 #define __get_sockaddr(field) ((struct sockaddr *)__get_dynamic_array(field)) 366 367 #undef __get_rel_sockaddr 368 #define __get_rel_sockaddr(field) ((struct sockaddr *)__get_rel_dynamic_array(field)) 369 370 #undef __print_flags 371 #define __print_flags(flag, delim, flag_array...) \ 372 ({ \ 373 static const struct trace_print_flags __flags[] = \ 374 { flag_array, { -1, NULL }}; \ 375 trace_print_flags_seq(p, delim, flag, __flags); \ 376 }) 377 378 #undef __print_symbolic 379 #define __print_symbolic(value, symbol_array...) \ 380 ({ \ 381 static const struct trace_print_flags symbols[] = \ 382 { symbol_array, { -1, NULL }}; \ 383 trace_print_symbols_seq(p, value, symbols); \ 384 }) 385 386 #undef __print_flags_u64 387 #undef __print_symbolic_u64 388 #if BITS_PER_LONG == 32 389 #define __print_flags_u64(flag, delim, flag_array...) \ 390 ({ \ 391 static const struct trace_print_flags_u64 __flags[] = \ 392 { flag_array, { -1, NULL } }; \ 393 trace_print_flags_seq_u64(p, delim, flag, __flags); \ 394 }) 395 396 #define __print_symbolic_u64(value, symbol_array...) \ 397 ({ \ 398 static const struct trace_print_flags_u64 symbols[] = \ 399 { symbol_array, { -1, NULL } }; \ 400 trace_print_symbols_seq_u64(p, value, symbols); \ 401 }) 402 #else 403 #define __print_flags_u64(flag, delim, flag_array...) \ 404 __print_flags(flag, delim, flag_array) 405 406 #define __print_symbolic_u64(value, symbol_array...) \ 407 __print_symbolic(value, symbol_array) 408 #endif 409 410 #undef __print_hex 411 #define __print_hex(buf, buf_len) \ 412 trace_print_hex_seq(p, buf, buf_len, false) 413 414 #undef __print_hex_str 415 #define __print_hex_str(buf, buf_len) \ 416 trace_print_hex_seq(p, buf, buf_len, true) 417 418 #undef __print_array 419 #define __print_array(array, count, el_size) \ 420 ({ \ 421 BUILD_BUG_ON(el_size != 1 && el_size != 2 && \ 422 el_size != 4 && el_size != 8); \ 423 trace_print_array_seq(p, array, count, el_size); \ 424 }) 425 426 #undef __print_hex_dump 427 #define __print_hex_dump(prefix_str, prefix_type, \ 428 rowsize, groupsize, buf, len, ascii) \ 429 trace_print_hex_dump_seq(p, prefix_str, prefix_type, \ 430 rowsize, groupsize, buf, len, ascii) 431 432 #undef __print_ns_to_secs 433 #define __print_ns_to_secs(value) \ 434 ({ \ 435 u64 ____val = (u64)(value); \ 436 do_div(____val, NSEC_PER_SEC); \ 437 ____val; \ 438 }) 439 440 #undef __print_ns_without_secs 441 #define __print_ns_without_secs(value) \ 442 ({ \ 443 u64 ____val = (u64)(value); \ 444 (u32) do_div(____val, NSEC_PER_SEC); \ 445 }) 446 447 #undef DECLARE_EVENT_CLASS 448 #define DECLARE_EVENT_CLASS(call, proto, args, tstruct, assign, print) \ 449 static notrace enum print_line_t \ 450 trace_raw_output_##call(struct trace_iterator *iter, int flags, \ 451 struct trace_event *trace_event) \ 452 { \ 453 struct trace_seq *s = &iter->seq; \ 454 struct trace_seq __maybe_unused *p = &iter->tmp_seq; \ 455 struct trace_event_raw_##call *field; \ 456 int ret; \ 457 \ 458 field = (typeof(field))iter->ent; \ 459 \ 460 ret = trace_raw_output_prep(iter, trace_event); \ 461 if (ret != TRACE_TYPE_HANDLED) \ 462 return ret; \ 463 \ 464 trace_event_printf(iter, print); \ 465 \ 466 return trace_handle_return(s); \ 467 } \ 468 static struct trace_event_functions trace_event_type_funcs_##call = { \ 469 .trace = trace_raw_output_##call, \ 470 }; 471 472 #undef DEFINE_EVENT_PRINT 473 #define DEFINE_EVENT_PRINT(template, call, proto, args, print) \ 474 static notrace enum print_line_t \ 475 trace_raw_output_##call(struct trace_iterator *iter, int flags, \ 476 struct trace_event *event) \ 477 { \ 478 struct trace_event_raw_##template *field; \ 479 struct trace_entry *entry; \ 480 struct trace_seq *p = &iter->tmp_seq; \ 481 \ 482 entry = iter->ent; \ 483 \ 484 if (entry->type != event_##call.event.type) { \ 485 WARN_ON_ONCE(1); \ 486 return TRACE_TYPE_UNHANDLED; \ 487 } \ 488 \ 489 field = (typeof(field))entry; \ 490 \ 491 trace_seq_init(p); \ 492 return trace_output_call(iter, #call, print); \ 493 } \ 494 static struct trace_event_functions trace_event_type_funcs_##call = { \ 495 .trace = trace_raw_output_##call, \ 496 }; 497 498 #include TRACE_INCLUDE(TRACE_INCLUDE_FILE) 499 500 #define ALIGN_STRUCTFIELD(type) ((int)(__alignof__(struct {type b;}))) 501 502 #undef __field_ext 503 #define __field_ext(_type, _item, _filter_type) { \ 504 .type = #_type, .name = #_item, \ 505 .size = sizeof(_type), .align = ALIGN_STRUCTFIELD(_type), \ 506 .is_signed = is_signed_type(_type), .filter_type = _filter_type }, 507 508 #undef __field_struct_ext 509 #define __field_struct_ext(_type, _item, _filter_type) { \ 510 .type = #_type, .name = #_item, \ 511 .size = sizeof(_type), .align = ALIGN_STRUCTFIELD(_type), \ 512 0, .filter_type = _filter_type }, 513 514 #undef __field 515 #define __field(type, item) __field_ext(type, item, FILTER_OTHER) 516 517 #undef __field_struct 518 #define __field_struct(type, item) __field_struct_ext(type, item, FILTER_OTHER) 519 520 #undef __array 521 #define __array(_type, _item, _len) { \ 522 .type = #_type"["__stringify(_len)"]", .name = #_item, \ 523 .size = sizeof(_type[_len]), .align = ALIGN_STRUCTFIELD(_type), \ 524 .is_signed = is_signed_type(_type), .filter_type = FILTER_OTHER }, 525 526 #undef __dynamic_array 527 #define __dynamic_array(_type, _item, _len) { \ 528 .type = "__data_loc " #_type "[]", .name = #_item, \ 529 .size = 4, .align = 4, \ 530 .is_signed = is_signed_type(_type), .filter_type = FILTER_OTHER }, 531 532 #undef __string 533 #define __string(item, src) __dynamic_array(char, item, -1) 534 535 #undef __string_len 536 #define __string_len(item, src, len) __dynamic_array(char, item, -1) 537 538 #undef __bitmask 539 #define __bitmask(item, nr_bits) __dynamic_array(unsigned long, item, -1) 540 541 #undef __sockaddr 542 #define __sockaddr(field, len) __dynamic_array(u8, field, len) 543 544 #undef __rel_dynamic_array 545 #define __rel_dynamic_array(_type, _item, _len) { \ 546 .type = "__rel_loc " #_type "[]", .name = #_item, \ 547 .size = 4, .align = 4, \ 548 .is_signed = is_signed_type(_type), .filter_type = FILTER_OTHER }, 549 550 #undef __rel_string 551 #define __rel_string(item, src) __rel_dynamic_array(char, item, -1) 552 553 #undef __rel_string_len 554 #define __rel_string_len(item, src, len) __rel_dynamic_array(char, item, -1) 555 556 #undef __rel_bitmask 557 #define __rel_bitmask(item, nr_bits) __rel_dynamic_array(unsigned long, item, -1) 558 559 #undef __rel_sockaddr 560 #define __rel_sockaddr(field, len) __rel_dynamic_array(u8, field, len) 561 562 #undef DECLARE_EVENT_CLASS 563 #define DECLARE_EVENT_CLASS(call, proto, args, tstruct, func, print) \ 564 static struct trace_event_fields trace_event_fields_##call[] = { \ 565 tstruct \ 566 {} }; 567 568 #undef DEFINE_EVENT_PRINT 569 #define DEFINE_EVENT_PRINT(template, name, proto, args, print) 570 571 #include TRACE_INCLUDE(TRACE_INCLUDE_FILE) 572 573 /* 574 * remember the offset of each array from the beginning of the event. 575 */ 576 577 #undef __entry 578 #define __entry entry 579 580 #undef __field 581 #define __field(type, item) 582 583 #undef __field_ext 584 #define __field_ext(type, item, filter_type) 585 586 #undef __field_struct 587 #define __field_struct(type, item) 588 589 #undef __field_struct_ext 590 #define __field_struct_ext(type, item, filter_type) 591 592 #undef __array 593 #define __array(type, item, len) 594 595 #undef __dynamic_array 596 #define __dynamic_array(type, item, len) \ 597 __item_length = (len) * sizeof(type); \ 598 __data_offsets->item = __data_size + \ 599 offsetof(typeof(*entry), __data); \ 600 __data_offsets->item |= __item_length << 16; \ 601 __data_size += __item_length; 602 603 #undef __string 604 #define __string(item, src) __dynamic_array(char, item, \ 605 strlen((src) ? (const char *)(src) : "(null)") + 1) 606 607 #undef __string_len 608 #define __string_len(item, src, len) __dynamic_array(char, item, (len) + 1) 609 610 #undef __rel_dynamic_array 611 #define __rel_dynamic_array(type, item, len) \ 612 __item_length = (len) * sizeof(type); \ 613 __data_offsets->item = __data_size + \ 614 offsetof(typeof(*entry), __data) - \ 615 offsetof(typeof(*entry), __rel_loc_##item) - \ 616 sizeof(u32); \ 617 __data_offsets->item |= __item_length << 16; \ 618 __data_size += __item_length; 619 620 #undef __rel_string 621 #define __rel_string(item, src) __rel_dynamic_array(char, item, \ 622 strlen((src) ? (const char *)(src) : "(null)") + 1) 623 624 #undef __rel_string_len 625 #define __rel_string_len(item, src, len) __rel_dynamic_array(char, item, (len) + 1) 626 /* 627 * __bitmask_size_in_bytes_raw is the number of bytes needed to hold 628 * num_possible_cpus(). 629 */ 630 #define __bitmask_size_in_bytes_raw(nr_bits) \ 631 (((nr_bits) + 7) / 8) 632 633 #define __bitmask_size_in_longs(nr_bits) \ 634 ((__bitmask_size_in_bytes_raw(nr_bits) + \ 635 ((BITS_PER_LONG / 8) - 1)) / (BITS_PER_LONG / 8)) 636 637 /* 638 * __bitmask_size_in_bytes is the number of bytes needed to hold 639 * num_possible_cpus() padded out to the nearest long. This is what 640 * is saved in the buffer, just to be consistent. 641 */ 642 #define __bitmask_size_in_bytes(nr_bits) \ 643 (__bitmask_size_in_longs(nr_bits) * (BITS_PER_LONG / 8)) 644 645 #undef __bitmask 646 #define __bitmask(item, nr_bits) __dynamic_array(unsigned long, item, \ 647 __bitmask_size_in_longs(nr_bits)) 648 649 #undef __rel_bitmask 650 #define __rel_bitmask(item, nr_bits) __rel_dynamic_array(unsigned long, item, \ 651 __bitmask_size_in_longs(nr_bits)) 652 653 #undef __sockaddr 654 #define __sockaddr(field, len) __dynamic_array(u8, field, len) 655 656 #undef __rel_sockaddr 657 #define __rel_sockaddr(field, len) __rel_dynamic_array(u8, field, len) 658 659 #undef DECLARE_EVENT_CLASS 660 #define DECLARE_EVENT_CLASS(call, proto, args, tstruct, assign, print) \ 661 static inline notrace int trace_event_get_offsets_##call( \ 662 struct trace_event_data_offsets_##call *__data_offsets, proto) \ 663 { \ 664 int __data_size = 0; \ 665 int __maybe_unused __item_length; \ 666 struct trace_event_raw_##call __maybe_unused *entry; \ 667 \ 668 tstruct; \ 669 \ 670 return __data_size; \ 671 } 672 673 #include TRACE_INCLUDE(TRACE_INCLUDE_FILE) 674 675 /* 676 * Stage 4 of the trace events. 677 * 678 * Override the macros in the event tracepoint header <trace/events/XXX.h> 679 * to include the following: 680 * 681 * For those macros defined with TRACE_EVENT: 682 * 683 * static struct trace_event_call event_<call>; 684 * 685 * static void trace_event_raw_event_<call>(void *__data, proto) 686 * { 687 * struct trace_event_file *trace_file = __data; 688 * struct trace_event_call *event_call = trace_file->event_call; 689 * struct trace_event_data_offsets_<call> __maybe_unused __data_offsets; 690 * unsigned long eflags = trace_file->flags; 691 * enum event_trigger_type __tt = ETT_NONE; 692 * struct ring_buffer_event *event; 693 * struct trace_event_raw_<call> *entry; <-- defined in stage 1 694 * struct trace_buffer *buffer; 695 * unsigned long irq_flags; 696 * int __data_size; 697 * int pc; 698 * 699 * if (!(eflags & EVENT_FILE_FL_TRIGGER_COND)) { 700 * if (eflags & EVENT_FILE_FL_TRIGGER_MODE) 701 * event_triggers_call(trace_file, NULL); 702 * if (eflags & EVENT_FILE_FL_SOFT_DISABLED) 703 * return; 704 * } 705 * 706 * local_save_flags(irq_flags); 707 * pc = preempt_count(); 708 * 709 * __data_size = trace_event_get_offsets_<call>(&__data_offsets, args); 710 * 711 * event = trace_event_buffer_lock_reserve(&buffer, trace_file, 712 * event_<call>->event.type, 713 * sizeof(*entry) + __data_size, 714 * irq_flags, pc); 715 * if (!event) 716 * return; 717 * entry = ring_buffer_event_data(event); 718 * 719 * { <assign>; } <-- Here we assign the entries by the __field and 720 * __array macros. 721 * 722 * if (eflags & EVENT_FILE_FL_TRIGGER_COND) 723 * __tt = event_triggers_call(trace_file, entry); 724 * 725 * if (test_bit(EVENT_FILE_FL_SOFT_DISABLED_BIT, 726 * &trace_file->flags)) 727 * ring_buffer_discard_commit(buffer, event); 728 * else if (!filter_check_discard(trace_file, entry, buffer, event)) 729 * trace_buffer_unlock_commit(buffer, event, irq_flags, pc); 730 * 731 * if (__tt) 732 * event_triggers_post_call(trace_file, __tt); 733 * } 734 * 735 * static struct trace_event ftrace_event_type_<call> = { 736 * .trace = trace_raw_output_<call>, <-- stage 2 737 * }; 738 * 739 * static char print_fmt_<call>[] = <TP_printk>; 740 * 741 * static struct trace_event_class __used event_class_<template> = { 742 * .system = "<system>", 743 * .fields_array = trace_event_fields_<call>, 744 * .fields = LIST_HEAD_INIT(event_class_##call.fields), 745 * .raw_init = trace_event_raw_init, 746 * .probe = trace_event_raw_event_##call, 747 * .reg = trace_event_reg, 748 * }; 749 * 750 * static struct trace_event_call event_<call> = { 751 * .class = event_class_<template>, 752 * { 753 * .tp = &__tracepoint_<call>, 754 * }, 755 * .event = &ftrace_event_type_<call>, 756 * .print_fmt = print_fmt_<call>, 757 * .flags = TRACE_EVENT_FL_TRACEPOINT, 758 * }; 759 * // its only safe to use pointers when doing linker tricks to 760 * // create an array. 761 * static struct trace_event_call __used 762 * __section("_ftrace_events") *__event_<call> = &event_<call>; 763 * 764 */ 765 766 #ifdef CONFIG_PERF_EVENTS 767 768 #define _TRACE_PERF_PROTO(call, proto) \ 769 static notrace void \ 770 perf_trace_##call(void *__data, proto); 771 772 #define _TRACE_PERF_INIT(call) \ 773 .perf_probe = perf_trace_##call, 774 775 #else 776 #define _TRACE_PERF_PROTO(call, proto) 777 #define _TRACE_PERF_INIT(call) 778 #endif /* CONFIG_PERF_EVENTS */ 779 780 #undef __entry 781 #define __entry entry 782 783 #undef __field 784 #define __field(type, item) 785 786 #undef __field_struct 787 #define __field_struct(type, item) 788 789 #undef __array 790 #define __array(type, item, len) 791 792 #undef __dynamic_array 793 #define __dynamic_array(type, item, len) \ 794 __entry->__data_loc_##item = __data_offsets.item; 795 796 #undef __string 797 #define __string(item, src) __dynamic_array(char, item, -1) 798 799 #undef __string_len 800 #define __string_len(item, src, len) __dynamic_array(char, item, -1) 801 802 #undef __assign_str 803 #define __assign_str(dst, src) \ 804 strcpy(__get_str(dst), (src) ? (const char *)(src) : "(null)"); 805 806 #undef __assign_str_len 807 #define __assign_str_len(dst, src, len) \ 808 do { \ 809 memcpy(__get_str(dst), (src), (len)); \ 810 __get_str(dst)[len] = '\0'; \ 811 } while(0) 812 813 #undef __bitmask 814 #define __bitmask(item, nr_bits) __dynamic_array(unsigned long, item, -1) 815 816 #undef __get_bitmask 817 #define __get_bitmask(field) (char *)__get_dynamic_array(field) 818 819 #undef __assign_bitmask 820 #define __assign_bitmask(dst, src, nr_bits) \ 821 memcpy(__get_bitmask(dst), (src), __bitmask_size_in_bytes(nr_bits)) 822 823 #undef __sockaddr 824 #define __sockaddr(field, len) __dynamic_array(u8, field, len) 825 826 #undef __get_sockaddr 827 #define __get_sockaddr(field) ((struct sockaddr *)__get_dynamic_array(field)) 828 829 #define __assign_sockaddr(dest, src, len) \ 830 memcpy(__get_dynamic_array(dest), src, len) 831 832 #undef __rel_dynamic_array 833 #define __rel_dynamic_array(type, item, len) \ 834 __entry->__rel_loc_##item = __data_offsets.item; 835 836 #undef __rel_string 837 #define __rel_string(item, src) __rel_dynamic_array(char, item, -1) 838 839 #undef __rel_string_len 840 #define __rel_string_len(item, src, len) __rel_dynamic_array(char, item, -1) 841 842 #undef __assign_rel_str 843 #define __assign_rel_str(dst, src) \ 844 strcpy(__get_rel_str(dst), (src) ? (const char *)(src) : "(null)"); 845 846 #undef __assign_rel_str_len 847 #define __assign_rel_str_len(dst, src, len) \ 848 do { \ 849 memcpy(__get_rel_str(dst), (src), (len)); \ 850 __get_rel_str(dst)[len] = '\0'; \ 851 } while (0) 852 853 #undef __rel_bitmask 854 #define __rel_bitmask(item, nr_bits) __rel_dynamic_array(unsigned long, item, -1) 855 856 #undef __get_rel_bitmask 857 #define __get_rel_bitmask(field) (char *)__get_rel_dynamic_array(field) 858 859 #undef __assign_rel_bitmask 860 #define __assign_rel_bitmask(dst, src, nr_bits) \ 861 memcpy(__get_rel_bitmask(dst), (src), __bitmask_size_in_bytes(nr_bits)) 862 863 #undef __rel_sockaddr 864 #define __rel_sockaddr(field, len) __rel_dynamic_array(u8, field, len) 865 866 #undef __get_rel_sockaddr 867 #define __get_rel_sockaddr(field) ((struct sockaddr *)__get_rel_dynamic_array(field)) 868 869 #define __assign_rel_sockaddr(dest, src, len) \ 870 memcpy(__get_rel_dynamic_array(dest), src, len) 871 872 873 #undef TP_fast_assign 874 #define TP_fast_assign(args...) args 875 876 #undef __perf_count 877 #define __perf_count(c) (c) 878 879 #undef __perf_task 880 #define __perf_task(t) (t) 881 882 #undef DECLARE_EVENT_CLASS 883 #define DECLARE_EVENT_CLASS(call, proto, args, tstruct, assign, print) \ 884 \ 885 static notrace void \ 886 trace_event_raw_event_##call(void *__data, proto) \ 887 { \ 888 struct trace_event_file *trace_file = __data; \ 889 struct trace_event_data_offsets_##call __maybe_unused __data_offsets;\ 890 struct trace_event_buffer fbuffer; \ 891 struct trace_event_raw_##call *entry; \ 892 int __data_size; \ 893 \ 894 if (trace_trigger_soft_disabled(trace_file)) \ 895 return; \ 896 \ 897 __data_size = trace_event_get_offsets_##call(&__data_offsets, args); \ 898 \ 899 entry = trace_event_buffer_reserve(&fbuffer, trace_file, \ 900 sizeof(*entry) + __data_size); \ 901 \ 902 if (!entry) \ 903 return; \ 904 \ 905 tstruct \ 906 \ 907 { assign; } \ 908 \ 909 trace_event_buffer_commit(&fbuffer); \ 910 } 911 /* 912 * The ftrace_test_probe is compiled out, it is only here as a build time check 913 * to make sure that if the tracepoint handling changes, the ftrace probe will 914 * fail to compile unless it too is updated. 915 */ 916 917 #undef DEFINE_EVENT 918 #define DEFINE_EVENT(template, call, proto, args) \ 919 static inline void ftrace_test_probe_##call(void) \ 920 { \ 921 check_trace_callback_type_##call(trace_event_raw_event_##template); \ 922 } 923 924 #include TRACE_INCLUDE(TRACE_INCLUDE_FILE) 925 926 #undef __entry 927 #define __entry REC 928 929 #undef __print_flags 930 #undef __print_symbolic 931 #undef __print_hex 932 #undef __print_hex_str 933 #undef __get_dynamic_array 934 #undef __get_dynamic_array_len 935 #undef __get_str 936 #undef __get_bitmask 937 #undef __get_sockaddr 938 #undef __get_rel_dynamic_array 939 #undef __get_rel_dynamic_array_len 940 #undef __get_rel_str 941 #undef __get_rel_bitmask 942 #undef __get_rel_sockaddr 943 #undef __print_array 944 #undef __print_hex_dump 945 946 /* 947 * The below is not executed in the kernel. It is only what is 948 * displayed in the print format for userspace to parse. 949 */ 950 #undef __print_ns_to_secs 951 #define __print_ns_to_secs(val) (val) / 1000000000UL 952 953 #undef __print_ns_without_secs 954 #define __print_ns_without_secs(val) (val) % 1000000000UL 955 956 #undef TP_printk 957 #define TP_printk(fmt, args...) "\"" fmt "\", " __stringify(args) 958 959 #undef DECLARE_EVENT_CLASS 960 #define DECLARE_EVENT_CLASS(call, proto, args, tstruct, assign, print) \ 961 _TRACE_PERF_PROTO(call, PARAMS(proto)); \ 962 static char print_fmt_##call[] = print; \ 963 static struct trace_event_class __used __refdata event_class_##call = { \ 964 .system = TRACE_SYSTEM_STRING, \ 965 .fields_array = trace_event_fields_##call, \ 966 .fields = LIST_HEAD_INIT(event_class_##call.fields),\ 967 .raw_init = trace_event_raw_init, \ 968 .probe = trace_event_raw_event_##call, \ 969 .reg = trace_event_reg, \ 970 _TRACE_PERF_INIT(call) \ 971 }; 972 973 #undef DEFINE_EVENT 974 #define DEFINE_EVENT(template, call, proto, args) \ 975 \ 976 static struct trace_event_call __used event_##call = { \ 977 .class = &event_class_##template, \ 978 { \ 979 .tp = &__tracepoint_##call, \ 980 }, \ 981 .event.funcs = &trace_event_type_funcs_##template, \ 982 .print_fmt = print_fmt_##template, \ 983 .flags = TRACE_EVENT_FL_TRACEPOINT, \ 984 }; \ 985 static struct trace_event_call __used \ 986 __section("_ftrace_events") *__event_##call = &event_##call 987 988 #undef DEFINE_EVENT_PRINT 989 #define DEFINE_EVENT_PRINT(template, call, proto, args, print) \ 990 \ 991 static char print_fmt_##call[] = print; \ 992 \ 993 static struct trace_event_call __used event_##call = { \ 994 .class = &event_class_##template, \ 995 { \ 996 .tp = &__tracepoint_##call, \ 997 }, \ 998 .event.funcs = &trace_event_type_funcs_##call, \ 999 .print_fmt = print_fmt_##call, \ 1000 .flags = TRACE_EVENT_FL_TRACEPOINT, \ 1001 }; \ 1002 static struct trace_event_call __used \ 1003 __section("_ftrace_events") *__event_##call = &event_##call 1004 1005 #include TRACE_INCLUDE(TRACE_INCLUDE_FILE) 1006