1 2 #ifndef _LINUX_KERNEL_TRACE_H 3 #define _LINUX_KERNEL_TRACE_H 4 5 #include <linux/fs.h> 6 #include <linux/atomic.h> 7 #include <linux/sched.h> 8 #include <linux/clocksource.h> 9 #include <linux/ring_buffer.h> 10 #include <linux/mmiotrace.h> 11 #include <linux/tracepoint.h> 12 #include <linux/ftrace.h> 13 #include <linux/hw_breakpoint.h> 14 #include <linux/trace_seq.h> 15 #include <linux/ftrace_event.h> 16 #include <linux/compiler.h> 17 18 #ifdef CONFIG_FTRACE_SYSCALLS 19 #include <asm/unistd.h> /* For NR_SYSCALLS */ 20 #include <asm/syscall.h> /* some archs define it here */ 21 #endif 22 23 enum trace_type { 24 __TRACE_FIRST_TYPE = 0, 25 26 TRACE_FN, 27 TRACE_CTX, 28 TRACE_WAKE, 29 TRACE_STACK, 30 TRACE_PRINT, 31 TRACE_BPRINT, 32 TRACE_MMIO_RW, 33 TRACE_MMIO_MAP, 34 TRACE_BRANCH, 35 TRACE_GRAPH_RET, 36 TRACE_GRAPH_ENT, 37 TRACE_USER_STACK, 38 TRACE_BLK, 39 TRACE_BPUTS, 40 41 __TRACE_LAST_TYPE, 42 }; 43 44 45 #undef __field 46 #define __field(type, item) type item; 47 48 #undef __field_struct 49 #define __field_struct(type, item) __field(type, item) 50 51 #undef __field_desc 52 #define __field_desc(type, container, item) 53 54 #undef __array 55 #define __array(type, item, size) type item[size]; 56 57 #undef __array_desc 58 #define __array_desc(type, container, item, size) 59 60 #undef __dynamic_array 61 #define __dynamic_array(type, item) type item[]; 62 63 #undef F_STRUCT 64 #define F_STRUCT(args...) args 65 66 #undef FTRACE_ENTRY 67 #define FTRACE_ENTRY(name, struct_name, id, tstruct, print, filter) \ 68 struct struct_name { \ 69 struct trace_entry ent; \ 70 tstruct \ 71 } 72 73 #undef TP_ARGS 74 #define TP_ARGS(args...) args 75 76 #undef FTRACE_ENTRY_DUP 77 #define FTRACE_ENTRY_DUP(name, name_struct, id, tstruct, printk, filter) 78 79 #undef FTRACE_ENTRY_REG 80 #define FTRACE_ENTRY_REG(name, struct_name, id, tstruct, print, \ 81 filter, regfn) \ 82 FTRACE_ENTRY(name, struct_name, id, PARAMS(tstruct), PARAMS(print), \ 83 filter) 84 85 #include "trace_entries.h" 86 87 /* 88 * syscalls are special, and need special handling, this is why 89 * they are not included in trace_entries.h 90 */ 91 struct syscall_trace_enter { 92 struct trace_entry ent; 93 int nr; 94 unsigned long args[]; 95 }; 96 97 struct syscall_trace_exit { 98 struct trace_entry ent; 99 int nr; 100 long ret; 101 }; 102 103 struct kprobe_trace_entry_head { 104 struct trace_entry ent; 105 unsigned long ip; 106 }; 107 108 struct kretprobe_trace_entry_head { 109 struct trace_entry ent; 110 unsigned long func; 111 unsigned long ret_ip; 112 }; 113 114 /* 115 * trace_flag_type is an enumeration that holds different 116 * states when a trace occurs. These are: 117 * IRQS_OFF - interrupts were disabled 118 * IRQS_NOSUPPORT - arch does not support irqs_disabled_flags 119 * NEED_RESCHED - reschedule is requested 120 * HARDIRQ - inside an interrupt handler 121 * SOFTIRQ - inside a softirq handler 122 */ 123 enum trace_flag_type { 124 TRACE_FLAG_IRQS_OFF = 0x01, 125 TRACE_FLAG_IRQS_NOSUPPORT = 0x02, 126 TRACE_FLAG_NEED_RESCHED = 0x04, 127 TRACE_FLAG_HARDIRQ = 0x08, 128 TRACE_FLAG_SOFTIRQ = 0x10, 129 TRACE_FLAG_PREEMPT_RESCHED = 0x20, 130 }; 131 132 #define TRACE_BUF_SIZE 1024 133 134 struct trace_array; 135 136 /* 137 * The CPU trace array - it consists of thousands of trace entries 138 * plus some other descriptor data: (for example which task started 139 * the trace, etc.) 140 */ 141 struct trace_array_cpu { 142 atomic_t disabled; 143 void *buffer_page; /* ring buffer spare */ 144 145 unsigned long entries; 146 unsigned long saved_latency; 147 unsigned long critical_start; 148 unsigned long critical_end; 149 unsigned long critical_sequence; 150 unsigned long nice; 151 unsigned long policy; 152 unsigned long rt_priority; 153 unsigned long skipped_entries; 154 cycle_t preempt_timestamp; 155 pid_t pid; 156 kuid_t uid; 157 char comm[TASK_COMM_LEN]; 158 }; 159 160 struct tracer; 161 162 struct trace_buffer { 163 struct trace_array *tr; 164 struct ring_buffer *buffer; 165 struct trace_array_cpu __percpu *data; 166 cycle_t time_start; 167 int cpu; 168 }; 169 170 /* 171 * The trace array - an array of per-CPU trace arrays. This is the 172 * highest level data structure that individual tracers deal with. 173 * They have on/off state as well: 174 */ 175 struct trace_array { 176 struct list_head list; 177 char *name; 178 struct trace_buffer trace_buffer; 179 #ifdef CONFIG_TRACER_MAX_TRACE 180 /* 181 * The max_buffer is used to snapshot the trace when a maximum 182 * latency is reached, or when the user initiates a snapshot. 183 * Some tracers will use this to store a maximum trace while 184 * it continues examining live traces. 185 * 186 * The buffers for the max_buffer are set up the same as the trace_buffer 187 * When a snapshot is taken, the buffer of the max_buffer is swapped 188 * with the buffer of the trace_buffer and the buffers are reset for 189 * the trace_buffer so the tracing can continue. 190 */ 191 struct trace_buffer max_buffer; 192 bool allocated_snapshot; 193 unsigned long max_latency; 194 #endif 195 /* 196 * max_lock is used to protect the swapping of buffers 197 * when taking a max snapshot. The buffers themselves are 198 * protected by per_cpu spinlocks. But the action of the swap 199 * needs its own lock. 200 * 201 * This is defined as a arch_spinlock_t in order to help 202 * with performance when lockdep debugging is enabled. 203 * 204 * It is also used in other places outside the update_max_tr 205 * so it needs to be defined outside of the 206 * CONFIG_TRACER_MAX_TRACE. 207 */ 208 arch_spinlock_t max_lock; 209 int buffer_disabled; 210 #ifdef CONFIG_FTRACE_SYSCALLS 211 int sys_refcount_enter; 212 int sys_refcount_exit; 213 struct ftrace_event_file __rcu *enter_syscall_files[NR_syscalls]; 214 struct ftrace_event_file __rcu *exit_syscall_files[NR_syscalls]; 215 #endif 216 int stop_count; 217 int clock_id; 218 struct tracer *current_trace; 219 unsigned int flags; 220 raw_spinlock_t start_lock; 221 struct dentry *dir; 222 struct dentry *options; 223 struct dentry *percpu_dir; 224 struct dentry *event_dir; 225 struct list_head systems; 226 struct list_head events; 227 cpumask_var_t tracing_cpumask; /* only trace on set CPUs */ 228 int ref; 229 #ifdef CONFIG_FUNCTION_TRACER 230 struct ftrace_ops *ops; 231 /* function tracing enabled */ 232 int function_enabled; 233 #endif 234 }; 235 236 enum { 237 TRACE_ARRAY_FL_GLOBAL = (1 << 0) 238 }; 239 240 extern struct list_head ftrace_trace_arrays; 241 242 extern struct mutex trace_types_lock; 243 244 extern int trace_array_get(struct trace_array *tr); 245 extern void trace_array_put(struct trace_array *tr); 246 247 /* 248 * The global tracer (top) should be the first trace array added, 249 * but we check the flag anyway. 250 */ 251 static inline struct trace_array *top_trace_array(void) 252 { 253 struct trace_array *tr; 254 255 if (list_empty(ftrace_trace_arrays.prev)) 256 return NULL; 257 258 tr = list_entry(ftrace_trace_arrays.prev, 259 typeof(*tr), list); 260 WARN_ON(!(tr->flags & TRACE_ARRAY_FL_GLOBAL)); 261 return tr; 262 } 263 264 #define FTRACE_CMP_TYPE(var, type) \ 265 __builtin_types_compatible_p(typeof(var), type *) 266 267 #undef IF_ASSIGN 268 #define IF_ASSIGN(var, entry, etype, id) \ 269 if (FTRACE_CMP_TYPE(var, etype)) { \ 270 var = (typeof(var))(entry); \ 271 WARN_ON(id && (entry)->type != id); \ 272 break; \ 273 } 274 275 /* Will cause compile errors if type is not found. */ 276 extern void __ftrace_bad_type(void); 277 278 /* 279 * The trace_assign_type is a verifier that the entry type is 280 * the same as the type being assigned. To add new types simply 281 * add a line with the following format: 282 * 283 * IF_ASSIGN(var, ent, type, id); 284 * 285 * Where "type" is the trace type that includes the trace_entry 286 * as the "ent" item. And "id" is the trace identifier that is 287 * used in the trace_type enum. 288 * 289 * If the type can have more than one id, then use zero. 290 */ 291 #define trace_assign_type(var, ent) \ 292 do { \ 293 IF_ASSIGN(var, ent, struct ftrace_entry, TRACE_FN); \ 294 IF_ASSIGN(var, ent, struct ctx_switch_entry, 0); \ 295 IF_ASSIGN(var, ent, struct stack_entry, TRACE_STACK); \ 296 IF_ASSIGN(var, ent, struct userstack_entry, TRACE_USER_STACK);\ 297 IF_ASSIGN(var, ent, struct print_entry, TRACE_PRINT); \ 298 IF_ASSIGN(var, ent, struct bprint_entry, TRACE_BPRINT); \ 299 IF_ASSIGN(var, ent, struct bputs_entry, TRACE_BPUTS); \ 300 IF_ASSIGN(var, ent, struct trace_mmiotrace_rw, \ 301 TRACE_MMIO_RW); \ 302 IF_ASSIGN(var, ent, struct trace_mmiotrace_map, \ 303 TRACE_MMIO_MAP); \ 304 IF_ASSIGN(var, ent, struct trace_branch, TRACE_BRANCH); \ 305 IF_ASSIGN(var, ent, struct ftrace_graph_ent_entry, \ 306 TRACE_GRAPH_ENT); \ 307 IF_ASSIGN(var, ent, struct ftrace_graph_ret_entry, \ 308 TRACE_GRAPH_RET); \ 309 __ftrace_bad_type(); \ 310 } while (0) 311 312 /* 313 * An option specific to a tracer. This is a boolean value. 314 * The bit is the bit index that sets its value on the 315 * flags value in struct tracer_flags. 316 */ 317 struct tracer_opt { 318 const char *name; /* Will appear on the trace_options file */ 319 u32 bit; /* Mask assigned in val field in tracer_flags */ 320 }; 321 322 /* 323 * The set of specific options for a tracer. Your tracer 324 * have to set the initial value of the flags val. 325 */ 326 struct tracer_flags { 327 u32 val; 328 struct tracer_opt *opts; 329 }; 330 331 /* Makes more easy to define a tracer opt */ 332 #define TRACER_OPT(s, b) .name = #s, .bit = b 333 334 335 /** 336 * struct tracer - a specific tracer and its callbacks to interact with debugfs 337 * @name: the name chosen to select it on the available_tracers file 338 * @init: called when one switches to this tracer (echo name > current_tracer) 339 * @reset: called when one switches to another tracer 340 * @start: called when tracing is unpaused (echo 1 > tracing_enabled) 341 * @stop: called when tracing is paused (echo 0 > tracing_enabled) 342 * @open: called when the trace file is opened 343 * @pipe_open: called when the trace_pipe file is opened 344 * @close: called when the trace file is released 345 * @pipe_close: called when the trace_pipe file is released 346 * @read: override the default read callback on trace_pipe 347 * @splice_read: override the default splice_read callback on trace_pipe 348 * @selftest: selftest to run on boot (see trace_selftest.c) 349 * @print_headers: override the first lines that describe your columns 350 * @print_line: callback that prints a trace 351 * @set_flag: signals one of your private flags changed (trace_options file) 352 * @flags: your private flags 353 */ 354 struct tracer { 355 const char *name; 356 int (*init)(struct trace_array *tr); 357 void (*reset)(struct trace_array *tr); 358 void (*start)(struct trace_array *tr); 359 void (*stop)(struct trace_array *tr); 360 void (*open)(struct trace_iterator *iter); 361 void (*pipe_open)(struct trace_iterator *iter); 362 void (*close)(struct trace_iterator *iter); 363 void (*pipe_close)(struct trace_iterator *iter); 364 ssize_t (*read)(struct trace_iterator *iter, 365 struct file *filp, char __user *ubuf, 366 size_t cnt, loff_t *ppos); 367 ssize_t (*splice_read)(struct trace_iterator *iter, 368 struct file *filp, 369 loff_t *ppos, 370 struct pipe_inode_info *pipe, 371 size_t len, 372 unsigned int flags); 373 #ifdef CONFIG_FTRACE_STARTUP_TEST 374 int (*selftest)(struct tracer *trace, 375 struct trace_array *tr); 376 #endif 377 void (*print_header)(struct seq_file *m); 378 enum print_line_t (*print_line)(struct trace_iterator *iter); 379 /* If you handled the flag setting, return 0 */ 380 int (*set_flag)(struct trace_array *tr, 381 u32 old_flags, u32 bit, int set); 382 /* Return 0 if OK with change, else return non-zero */ 383 int (*flag_changed)(struct trace_array *tr, 384 u32 mask, int set); 385 struct tracer *next; 386 struct tracer_flags *flags; 387 int enabled; 388 bool print_max; 389 bool allow_instances; 390 #ifdef CONFIG_TRACER_MAX_TRACE 391 bool use_max_tr; 392 #endif 393 }; 394 395 396 /* Only current can touch trace_recursion */ 397 398 /* 399 * For function tracing recursion: 400 * The order of these bits are important. 401 * 402 * When function tracing occurs, the following steps are made: 403 * If arch does not support a ftrace feature: 404 * call internal function (uses INTERNAL bits) which calls... 405 * If callback is registered to the "global" list, the list 406 * function is called and recursion checks the GLOBAL bits. 407 * then this function calls... 408 * The function callback, which can use the FTRACE bits to 409 * check for recursion. 410 * 411 * Now if the arch does not suppport a feature, and it calls 412 * the global list function which calls the ftrace callback 413 * all three of these steps will do a recursion protection. 414 * There's no reason to do one if the previous caller already 415 * did. The recursion that we are protecting against will 416 * go through the same steps again. 417 * 418 * To prevent the multiple recursion checks, if a recursion 419 * bit is set that is higher than the MAX bit of the current 420 * check, then we know that the check was made by the previous 421 * caller, and we can skip the current check. 422 */ 423 enum { 424 TRACE_BUFFER_BIT, 425 TRACE_BUFFER_NMI_BIT, 426 TRACE_BUFFER_IRQ_BIT, 427 TRACE_BUFFER_SIRQ_BIT, 428 429 /* Start of function recursion bits */ 430 TRACE_FTRACE_BIT, 431 TRACE_FTRACE_NMI_BIT, 432 TRACE_FTRACE_IRQ_BIT, 433 TRACE_FTRACE_SIRQ_BIT, 434 435 /* INTERNAL_BITs must be greater than FTRACE_BITs */ 436 TRACE_INTERNAL_BIT, 437 TRACE_INTERNAL_NMI_BIT, 438 TRACE_INTERNAL_IRQ_BIT, 439 TRACE_INTERNAL_SIRQ_BIT, 440 441 TRACE_CONTROL_BIT, 442 443 /* 444 * Abuse of the trace_recursion. 445 * As we need a way to maintain state if we are tracing the function 446 * graph in irq because we want to trace a particular function that 447 * was called in irq context but we have irq tracing off. Since this 448 * can only be modified by current, we can reuse trace_recursion. 449 */ 450 TRACE_IRQ_BIT, 451 }; 452 453 #define trace_recursion_set(bit) do { (current)->trace_recursion |= (1<<(bit)); } while (0) 454 #define trace_recursion_clear(bit) do { (current)->trace_recursion &= ~(1<<(bit)); } while (0) 455 #define trace_recursion_test(bit) ((current)->trace_recursion & (1<<(bit))) 456 457 #define TRACE_CONTEXT_BITS 4 458 459 #define TRACE_FTRACE_START TRACE_FTRACE_BIT 460 #define TRACE_FTRACE_MAX ((1 << (TRACE_FTRACE_START + TRACE_CONTEXT_BITS)) - 1) 461 462 #define TRACE_LIST_START TRACE_INTERNAL_BIT 463 #define TRACE_LIST_MAX ((1 << (TRACE_LIST_START + TRACE_CONTEXT_BITS)) - 1) 464 465 #define TRACE_CONTEXT_MASK TRACE_LIST_MAX 466 467 static __always_inline int trace_get_context_bit(void) 468 { 469 int bit; 470 471 if (in_interrupt()) { 472 if (in_nmi()) 473 bit = 0; 474 475 else if (in_irq()) 476 bit = 1; 477 else 478 bit = 2; 479 } else 480 bit = 3; 481 482 return bit; 483 } 484 485 static __always_inline int trace_test_and_set_recursion(int start, int max) 486 { 487 unsigned int val = current->trace_recursion; 488 int bit; 489 490 /* A previous recursion check was made */ 491 if ((val & TRACE_CONTEXT_MASK) > max) 492 return 0; 493 494 bit = trace_get_context_bit() + start; 495 if (unlikely(val & (1 << bit))) 496 return -1; 497 498 val |= 1 << bit; 499 current->trace_recursion = val; 500 barrier(); 501 502 return bit; 503 } 504 505 static __always_inline void trace_clear_recursion(int bit) 506 { 507 unsigned int val = current->trace_recursion; 508 509 if (!bit) 510 return; 511 512 bit = 1 << bit; 513 val &= ~bit; 514 515 barrier(); 516 current->trace_recursion = val; 517 } 518 519 static inline struct ring_buffer_iter * 520 trace_buffer_iter(struct trace_iterator *iter, int cpu) 521 { 522 if (iter->buffer_iter && iter->buffer_iter[cpu]) 523 return iter->buffer_iter[cpu]; 524 return NULL; 525 } 526 527 int tracer_init(struct tracer *t, struct trace_array *tr); 528 int tracing_is_enabled(void); 529 void tracing_reset(struct trace_buffer *buf, int cpu); 530 void tracing_reset_online_cpus(struct trace_buffer *buf); 531 void tracing_reset_current(int cpu); 532 void tracing_reset_all_online_cpus(void); 533 int tracing_open_generic(struct inode *inode, struct file *filp); 534 bool tracing_is_disabled(void); 535 struct dentry *trace_create_file(const char *name, 536 umode_t mode, 537 struct dentry *parent, 538 void *data, 539 const struct file_operations *fops); 540 541 struct dentry *tracing_init_dentry_tr(struct trace_array *tr); 542 struct dentry *tracing_init_dentry(void); 543 544 struct ring_buffer_event; 545 546 struct ring_buffer_event * 547 trace_buffer_lock_reserve(struct ring_buffer *buffer, 548 int type, 549 unsigned long len, 550 unsigned long flags, 551 int pc); 552 553 struct trace_entry *tracing_get_trace_entry(struct trace_array *tr, 554 struct trace_array_cpu *data); 555 556 struct trace_entry *trace_find_next_entry(struct trace_iterator *iter, 557 int *ent_cpu, u64 *ent_ts); 558 559 void __buffer_unlock_commit(struct ring_buffer *buffer, 560 struct ring_buffer_event *event); 561 562 int trace_empty(struct trace_iterator *iter); 563 564 void *trace_find_next_entry_inc(struct trace_iterator *iter); 565 566 void trace_init_global_iter(struct trace_iterator *iter); 567 568 void tracing_iter_reset(struct trace_iterator *iter, int cpu); 569 570 void tracing_sched_switch_trace(struct trace_array *tr, 571 struct task_struct *prev, 572 struct task_struct *next, 573 unsigned long flags, int pc); 574 575 void tracing_sched_wakeup_trace(struct trace_array *tr, 576 struct task_struct *wakee, 577 struct task_struct *cur, 578 unsigned long flags, int pc); 579 void trace_function(struct trace_array *tr, 580 unsigned long ip, 581 unsigned long parent_ip, 582 unsigned long flags, int pc); 583 void trace_graph_function(struct trace_array *tr, 584 unsigned long ip, 585 unsigned long parent_ip, 586 unsigned long flags, int pc); 587 void trace_latency_header(struct seq_file *m); 588 void trace_default_header(struct seq_file *m); 589 void print_trace_header(struct seq_file *m, struct trace_iterator *iter); 590 int trace_empty(struct trace_iterator *iter); 591 592 void trace_graph_return(struct ftrace_graph_ret *trace); 593 int trace_graph_entry(struct ftrace_graph_ent *trace); 594 void set_graph_array(struct trace_array *tr); 595 596 void tracing_start_cmdline_record(void); 597 void tracing_stop_cmdline_record(void); 598 void tracing_sched_switch_assign_trace(struct trace_array *tr); 599 void tracing_stop_sched_switch_record(void); 600 void tracing_start_sched_switch_record(void); 601 int register_tracer(struct tracer *type); 602 int is_tracing_stopped(void); 603 604 loff_t tracing_lseek(struct file *file, loff_t offset, int whence); 605 606 extern cpumask_var_t __read_mostly tracing_buffer_mask; 607 608 #define for_each_tracing_cpu(cpu) \ 609 for_each_cpu(cpu, tracing_buffer_mask) 610 611 extern unsigned long nsecs_to_usecs(unsigned long nsecs); 612 613 extern unsigned long tracing_thresh; 614 615 #ifdef CONFIG_TRACER_MAX_TRACE 616 void update_max_tr(struct trace_array *tr, struct task_struct *tsk, int cpu); 617 void update_max_tr_single(struct trace_array *tr, 618 struct task_struct *tsk, int cpu); 619 #endif /* CONFIG_TRACER_MAX_TRACE */ 620 621 #ifdef CONFIG_STACKTRACE 622 void ftrace_trace_stack(struct ring_buffer *buffer, unsigned long flags, 623 int skip, int pc); 624 625 void ftrace_trace_stack_regs(struct ring_buffer *buffer, unsigned long flags, 626 int skip, int pc, struct pt_regs *regs); 627 628 void ftrace_trace_userstack(struct ring_buffer *buffer, unsigned long flags, 629 int pc); 630 631 void __trace_stack(struct trace_array *tr, unsigned long flags, int skip, 632 int pc); 633 #else 634 static inline void ftrace_trace_stack(struct ring_buffer *buffer, 635 unsigned long flags, int skip, int pc) 636 { 637 } 638 639 static inline void ftrace_trace_stack_regs(struct ring_buffer *buffer, 640 unsigned long flags, int skip, 641 int pc, struct pt_regs *regs) 642 { 643 } 644 645 static inline void ftrace_trace_userstack(struct ring_buffer *buffer, 646 unsigned long flags, int pc) 647 { 648 } 649 650 static inline void __trace_stack(struct trace_array *tr, unsigned long flags, 651 int skip, int pc) 652 { 653 } 654 #endif /* CONFIG_STACKTRACE */ 655 656 extern cycle_t ftrace_now(int cpu); 657 658 extern void trace_find_cmdline(int pid, char comm[]); 659 660 #ifdef CONFIG_DYNAMIC_FTRACE 661 extern unsigned long ftrace_update_tot_cnt; 662 #endif 663 #define DYN_FTRACE_TEST_NAME trace_selftest_dynamic_test_func 664 extern int DYN_FTRACE_TEST_NAME(void); 665 #define DYN_FTRACE_TEST_NAME2 trace_selftest_dynamic_test_func2 666 extern int DYN_FTRACE_TEST_NAME2(void); 667 668 extern bool ring_buffer_expanded; 669 extern bool tracing_selftest_disabled; 670 DECLARE_PER_CPU(int, ftrace_cpu_disabled); 671 672 #ifdef CONFIG_FTRACE_STARTUP_TEST 673 extern int trace_selftest_startup_function(struct tracer *trace, 674 struct trace_array *tr); 675 extern int trace_selftest_startup_function_graph(struct tracer *trace, 676 struct trace_array *tr); 677 extern int trace_selftest_startup_irqsoff(struct tracer *trace, 678 struct trace_array *tr); 679 extern int trace_selftest_startup_preemptoff(struct tracer *trace, 680 struct trace_array *tr); 681 extern int trace_selftest_startup_preemptirqsoff(struct tracer *trace, 682 struct trace_array *tr); 683 extern int trace_selftest_startup_wakeup(struct tracer *trace, 684 struct trace_array *tr); 685 extern int trace_selftest_startup_nop(struct tracer *trace, 686 struct trace_array *tr); 687 extern int trace_selftest_startup_sched_switch(struct tracer *trace, 688 struct trace_array *tr); 689 extern int trace_selftest_startup_branch(struct tracer *trace, 690 struct trace_array *tr); 691 /* 692 * Tracer data references selftest functions that only occur 693 * on boot up. These can be __init functions. Thus, when selftests 694 * are enabled, then the tracers need to reference __init functions. 695 */ 696 #define __tracer_data __refdata 697 #else 698 /* Tracers are seldom changed. Optimize when selftests are disabled. */ 699 #define __tracer_data __read_mostly 700 #endif /* CONFIG_FTRACE_STARTUP_TEST */ 701 702 extern void *head_page(struct trace_array_cpu *data); 703 extern unsigned long long ns2usecs(cycle_t nsec); 704 extern int 705 trace_vbprintk(unsigned long ip, const char *fmt, va_list args); 706 extern int 707 trace_vprintk(unsigned long ip, const char *fmt, va_list args); 708 extern int 709 trace_array_vprintk(struct trace_array *tr, 710 unsigned long ip, const char *fmt, va_list args); 711 int trace_array_printk(struct trace_array *tr, 712 unsigned long ip, const char *fmt, ...); 713 int trace_array_printk_buf(struct ring_buffer *buffer, 714 unsigned long ip, const char *fmt, ...); 715 void trace_printk_seq(struct trace_seq *s); 716 enum print_line_t print_trace_line(struct trace_iterator *iter); 717 718 extern unsigned long trace_flags; 719 720 /* Standard output formatting function used for function return traces */ 721 #ifdef CONFIG_FUNCTION_GRAPH_TRACER 722 723 /* Flag options */ 724 #define TRACE_GRAPH_PRINT_OVERRUN 0x1 725 #define TRACE_GRAPH_PRINT_CPU 0x2 726 #define TRACE_GRAPH_PRINT_OVERHEAD 0x4 727 #define TRACE_GRAPH_PRINT_PROC 0x8 728 #define TRACE_GRAPH_PRINT_DURATION 0x10 729 #define TRACE_GRAPH_PRINT_ABS_TIME 0x20 730 #define TRACE_GRAPH_PRINT_IRQS 0x40 731 #define TRACE_GRAPH_PRINT_TAIL 0x80 732 #define TRACE_GRAPH_PRINT_FILL_SHIFT 28 733 #define TRACE_GRAPH_PRINT_FILL_MASK (0x3 << TRACE_GRAPH_PRINT_FILL_SHIFT) 734 735 extern enum print_line_t 736 print_graph_function_flags(struct trace_iterator *iter, u32 flags); 737 extern void print_graph_headers_flags(struct seq_file *s, u32 flags); 738 extern enum print_line_t 739 trace_print_graph_duration(unsigned long long duration, struct trace_seq *s); 740 extern void graph_trace_open(struct trace_iterator *iter); 741 extern void graph_trace_close(struct trace_iterator *iter); 742 extern int __trace_graph_entry(struct trace_array *tr, 743 struct ftrace_graph_ent *trace, 744 unsigned long flags, int pc); 745 extern void __trace_graph_return(struct trace_array *tr, 746 struct ftrace_graph_ret *trace, 747 unsigned long flags, int pc); 748 749 750 #ifdef CONFIG_DYNAMIC_FTRACE 751 /* TODO: make this variable */ 752 #define FTRACE_GRAPH_MAX_FUNCS 32 753 extern int ftrace_graph_count; 754 extern unsigned long ftrace_graph_funcs[FTRACE_GRAPH_MAX_FUNCS]; 755 extern int ftrace_graph_notrace_count; 756 extern unsigned long ftrace_graph_notrace_funcs[FTRACE_GRAPH_MAX_FUNCS]; 757 758 static inline int ftrace_graph_addr(unsigned long addr) 759 { 760 int i; 761 762 if (!ftrace_graph_count) 763 return 1; 764 765 for (i = 0; i < ftrace_graph_count; i++) { 766 if (addr == ftrace_graph_funcs[i]) { 767 /* 768 * If no irqs are to be traced, but a set_graph_function 769 * is set, and called by an interrupt handler, we still 770 * want to trace it. 771 */ 772 if (in_irq()) 773 trace_recursion_set(TRACE_IRQ_BIT); 774 else 775 trace_recursion_clear(TRACE_IRQ_BIT); 776 return 1; 777 } 778 } 779 780 return 0; 781 } 782 783 static inline int ftrace_graph_notrace_addr(unsigned long addr) 784 { 785 int i; 786 787 if (!ftrace_graph_notrace_count) 788 return 0; 789 790 for (i = 0; i < ftrace_graph_notrace_count; i++) { 791 if (addr == ftrace_graph_notrace_funcs[i]) 792 return 1; 793 } 794 795 return 0; 796 } 797 #else 798 static inline int ftrace_graph_addr(unsigned long addr) 799 { 800 return 1; 801 } 802 803 static inline int ftrace_graph_notrace_addr(unsigned long addr) 804 { 805 return 0; 806 } 807 #endif /* CONFIG_DYNAMIC_FTRACE */ 808 #else /* CONFIG_FUNCTION_GRAPH_TRACER */ 809 static inline enum print_line_t 810 print_graph_function_flags(struct trace_iterator *iter, u32 flags) 811 { 812 return TRACE_TYPE_UNHANDLED; 813 } 814 #endif /* CONFIG_FUNCTION_GRAPH_TRACER */ 815 816 extern struct list_head ftrace_pids; 817 818 #ifdef CONFIG_FUNCTION_TRACER 819 extern bool ftrace_filter_param __initdata; 820 static inline int ftrace_trace_task(struct task_struct *task) 821 { 822 if (list_empty(&ftrace_pids)) 823 return 1; 824 825 return test_tsk_trace_trace(task); 826 } 827 extern int ftrace_is_dead(void); 828 int ftrace_create_function_files(struct trace_array *tr, 829 struct dentry *parent); 830 void ftrace_destroy_function_files(struct trace_array *tr); 831 void ftrace_init_global_array_ops(struct trace_array *tr); 832 void ftrace_init_array_ops(struct trace_array *tr, ftrace_func_t func); 833 void ftrace_reset_array_ops(struct trace_array *tr); 834 int using_ftrace_ops_list_func(void); 835 #else 836 static inline int ftrace_trace_task(struct task_struct *task) 837 { 838 return 1; 839 } 840 static inline int ftrace_is_dead(void) { return 0; } 841 static inline int 842 ftrace_create_function_files(struct trace_array *tr, 843 struct dentry *parent) 844 { 845 return 0; 846 } 847 static inline void ftrace_destroy_function_files(struct trace_array *tr) { } 848 static inline __init void 849 ftrace_init_global_array_ops(struct trace_array *tr) { } 850 static inline void ftrace_reset_array_ops(struct trace_array *tr) { } 851 /* ftace_func_t type is not defined, use macro instead of static inline */ 852 #define ftrace_init_array_ops(tr, func) do { } while (0) 853 #endif /* CONFIG_FUNCTION_TRACER */ 854 855 #if defined(CONFIG_FUNCTION_TRACER) && defined(CONFIG_DYNAMIC_FTRACE) 856 void ftrace_create_filter_files(struct ftrace_ops *ops, 857 struct dentry *parent); 858 void ftrace_destroy_filter_files(struct ftrace_ops *ops); 859 #else 860 /* 861 * The ops parameter passed in is usually undefined. 862 * This must be a macro. 863 */ 864 #define ftrace_create_filter_files(ops, parent) do { } while (0) 865 #define ftrace_destroy_filter_files(ops) do { } while (0) 866 #endif /* CONFIG_FUNCTION_TRACER && CONFIG_DYNAMIC_FTRACE */ 867 868 int ftrace_event_is_function(struct ftrace_event_call *call); 869 870 /* 871 * struct trace_parser - servers for reading the user input separated by spaces 872 * @cont: set if the input is not complete - no final space char was found 873 * @buffer: holds the parsed user input 874 * @idx: user input length 875 * @size: buffer size 876 */ 877 struct trace_parser { 878 bool cont; 879 char *buffer; 880 unsigned idx; 881 unsigned size; 882 }; 883 884 static inline bool trace_parser_loaded(struct trace_parser *parser) 885 { 886 return (parser->idx != 0); 887 } 888 889 static inline bool trace_parser_cont(struct trace_parser *parser) 890 { 891 return parser->cont; 892 } 893 894 static inline void trace_parser_clear(struct trace_parser *parser) 895 { 896 parser->cont = false; 897 parser->idx = 0; 898 } 899 900 extern int trace_parser_get_init(struct trace_parser *parser, int size); 901 extern void trace_parser_put(struct trace_parser *parser); 902 extern int trace_get_user(struct trace_parser *parser, const char __user *ubuf, 903 size_t cnt, loff_t *ppos); 904 905 /* 906 * trace_iterator_flags is an enumeration that defines bit 907 * positions into trace_flags that controls the output. 908 * 909 * NOTE: These bits must match the trace_options array in 910 * trace.c. 911 */ 912 enum trace_iterator_flags { 913 TRACE_ITER_PRINT_PARENT = 0x01, 914 TRACE_ITER_SYM_OFFSET = 0x02, 915 TRACE_ITER_SYM_ADDR = 0x04, 916 TRACE_ITER_VERBOSE = 0x08, 917 TRACE_ITER_RAW = 0x10, 918 TRACE_ITER_HEX = 0x20, 919 TRACE_ITER_BIN = 0x40, 920 TRACE_ITER_BLOCK = 0x80, 921 TRACE_ITER_STACKTRACE = 0x100, 922 TRACE_ITER_PRINTK = 0x200, 923 TRACE_ITER_PREEMPTONLY = 0x400, 924 TRACE_ITER_BRANCH = 0x800, 925 TRACE_ITER_ANNOTATE = 0x1000, 926 TRACE_ITER_USERSTACKTRACE = 0x2000, 927 TRACE_ITER_SYM_USEROBJ = 0x4000, 928 TRACE_ITER_PRINTK_MSGONLY = 0x8000, 929 TRACE_ITER_CONTEXT_INFO = 0x10000, /* Print pid/cpu/time */ 930 TRACE_ITER_LATENCY_FMT = 0x20000, 931 TRACE_ITER_SLEEP_TIME = 0x40000, 932 TRACE_ITER_GRAPH_TIME = 0x80000, 933 TRACE_ITER_RECORD_CMD = 0x100000, 934 TRACE_ITER_OVERWRITE = 0x200000, 935 TRACE_ITER_STOP_ON_FREE = 0x400000, 936 TRACE_ITER_IRQ_INFO = 0x800000, 937 TRACE_ITER_MARKERS = 0x1000000, 938 TRACE_ITER_FUNCTION = 0x2000000, 939 }; 940 941 /* 942 * TRACE_ITER_SYM_MASK masks the options in trace_flags that 943 * control the output of kernel symbols. 944 */ 945 #define TRACE_ITER_SYM_MASK \ 946 (TRACE_ITER_PRINT_PARENT|TRACE_ITER_SYM_OFFSET|TRACE_ITER_SYM_ADDR) 947 948 extern struct tracer nop_trace; 949 950 #ifdef CONFIG_BRANCH_TRACER 951 extern int enable_branch_tracing(struct trace_array *tr); 952 extern void disable_branch_tracing(void); 953 static inline int trace_branch_enable(struct trace_array *tr) 954 { 955 if (trace_flags & TRACE_ITER_BRANCH) 956 return enable_branch_tracing(tr); 957 return 0; 958 } 959 static inline void trace_branch_disable(void) 960 { 961 /* due to races, always disable */ 962 disable_branch_tracing(); 963 } 964 #else 965 static inline int trace_branch_enable(struct trace_array *tr) 966 { 967 return 0; 968 } 969 static inline void trace_branch_disable(void) 970 { 971 } 972 #endif /* CONFIG_BRANCH_TRACER */ 973 974 /* set ring buffers to default size if not already done so */ 975 int tracing_update_buffers(void); 976 977 struct ftrace_event_field { 978 struct list_head link; 979 const char *name; 980 const char *type; 981 int filter_type; 982 int offset; 983 int size; 984 int is_signed; 985 }; 986 987 struct event_filter { 988 int n_preds; /* Number assigned */ 989 int a_preds; /* allocated */ 990 struct filter_pred *preds; 991 struct filter_pred *root; 992 char *filter_string; 993 }; 994 995 struct event_subsystem { 996 struct list_head list; 997 const char *name; 998 struct event_filter *filter; 999 int ref_count; 1000 }; 1001 1002 struct ftrace_subsystem_dir { 1003 struct list_head list; 1004 struct event_subsystem *subsystem; 1005 struct trace_array *tr; 1006 struct dentry *entry; 1007 int ref_count; 1008 int nr_events; 1009 }; 1010 1011 #define FILTER_PRED_INVALID ((unsigned short)-1) 1012 #define FILTER_PRED_IS_RIGHT (1 << 15) 1013 #define FILTER_PRED_FOLD (1 << 15) 1014 1015 /* 1016 * The max preds is the size of unsigned short with 1017 * two flags at the MSBs. One bit is used for both the IS_RIGHT 1018 * and FOLD flags. The other is reserved. 1019 * 1020 * 2^14 preds is way more than enough. 1021 */ 1022 #define MAX_FILTER_PRED 16384 1023 1024 struct filter_pred; 1025 struct regex; 1026 1027 typedef int (*filter_pred_fn_t) (struct filter_pred *pred, void *event); 1028 1029 typedef int (*regex_match_func)(char *str, struct regex *r, int len); 1030 1031 enum regex_type { 1032 MATCH_FULL = 0, 1033 MATCH_FRONT_ONLY, 1034 MATCH_MIDDLE_ONLY, 1035 MATCH_END_ONLY, 1036 }; 1037 1038 struct regex { 1039 char pattern[MAX_FILTER_STR_VAL]; 1040 int len; 1041 int field_len; 1042 regex_match_func match; 1043 }; 1044 1045 struct filter_pred { 1046 filter_pred_fn_t fn; 1047 u64 val; 1048 struct regex regex; 1049 unsigned short *ops; 1050 struct ftrace_event_field *field; 1051 int offset; 1052 int not; 1053 int op; 1054 unsigned short index; 1055 unsigned short parent; 1056 unsigned short left; 1057 unsigned short right; 1058 }; 1059 1060 extern enum regex_type 1061 filter_parse_regex(char *buff, int len, char **search, int *not); 1062 extern void print_event_filter(struct ftrace_event_file *file, 1063 struct trace_seq *s); 1064 extern int apply_event_filter(struct ftrace_event_file *file, 1065 char *filter_string); 1066 extern int apply_subsystem_event_filter(struct ftrace_subsystem_dir *dir, 1067 char *filter_string); 1068 extern void print_subsystem_event_filter(struct event_subsystem *system, 1069 struct trace_seq *s); 1070 extern int filter_assign_type(const char *type); 1071 extern int create_event_filter(struct ftrace_event_call *call, 1072 char *filter_str, bool set_str, 1073 struct event_filter **filterp); 1074 extern void free_event_filter(struct event_filter *filter); 1075 1076 struct ftrace_event_field * 1077 trace_find_event_field(struct ftrace_event_call *call, char *name); 1078 1079 extern void trace_event_enable_cmd_record(bool enable); 1080 extern int event_trace_add_tracer(struct dentry *parent, struct trace_array *tr); 1081 extern int event_trace_del_tracer(struct trace_array *tr); 1082 1083 extern struct ftrace_event_file *find_event_file(struct trace_array *tr, 1084 const char *system, 1085 const char *event); 1086 1087 static inline void *event_file_data(struct file *filp) 1088 { 1089 return ACCESS_ONCE(file_inode(filp)->i_private); 1090 } 1091 1092 extern struct mutex event_mutex; 1093 extern struct list_head ftrace_events; 1094 1095 extern const struct file_operations event_trigger_fops; 1096 1097 extern int register_trigger_cmds(void); 1098 extern void clear_event_triggers(struct trace_array *tr); 1099 1100 struct event_trigger_data { 1101 unsigned long count; 1102 int ref; 1103 struct event_trigger_ops *ops; 1104 struct event_command *cmd_ops; 1105 struct event_filter __rcu *filter; 1106 char *filter_str; 1107 void *private_data; 1108 struct list_head list; 1109 }; 1110 1111 /** 1112 * struct event_trigger_ops - callbacks for trace event triggers 1113 * 1114 * The methods in this structure provide per-event trigger hooks for 1115 * various trigger operations. 1116 * 1117 * All the methods below, except for @init() and @free(), must be 1118 * implemented. 1119 * 1120 * @func: The trigger 'probe' function called when the triggering 1121 * event occurs. The data passed into this callback is the data 1122 * that was supplied to the event_command @reg() function that 1123 * registered the trigger (see struct event_command). 1124 * 1125 * @init: An optional initialization function called for the trigger 1126 * when the trigger is registered (via the event_command reg() 1127 * function). This can be used to perform per-trigger 1128 * initialization such as incrementing a per-trigger reference 1129 * count, for instance. This is usually implemented by the 1130 * generic utility function @event_trigger_init() (see 1131 * trace_event_triggers.c). 1132 * 1133 * @free: An optional de-initialization function called for the 1134 * trigger when the trigger is unregistered (via the 1135 * event_command @reg() function). This can be used to perform 1136 * per-trigger de-initialization such as decrementing a 1137 * per-trigger reference count and freeing corresponding trigger 1138 * data, for instance. This is usually implemented by the 1139 * generic utility function @event_trigger_free() (see 1140 * trace_event_triggers.c). 1141 * 1142 * @print: The callback function invoked to have the trigger print 1143 * itself. This is usually implemented by a wrapper function 1144 * that calls the generic utility function @event_trigger_print() 1145 * (see trace_event_triggers.c). 1146 */ 1147 struct event_trigger_ops { 1148 void (*func)(struct event_trigger_data *data); 1149 int (*init)(struct event_trigger_ops *ops, 1150 struct event_trigger_data *data); 1151 void (*free)(struct event_trigger_ops *ops, 1152 struct event_trigger_data *data); 1153 int (*print)(struct seq_file *m, 1154 struct event_trigger_ops *ops, 1155 struct event_trigger_data *data); 1156 }; 1157 1158 /** 1159 * struct event_command - callbacks and data members for event commands 1160 * 1161 * Event commands are invoked by users by writing the command name 1162 * into the 'trigger' file associated with a trace event. The 1163 * parameters associated with a specific invocation of an event 1164 * command are used to create an event trigger instance, which is 1165 * added to the list of trigger instances associated with that trace 1166 * event. When the event is hit, the set of triggers associated with 1167 * that event is invoked. 1168 * 1169 * The data members in this structure provide per-event command data 1170 * for various event commands. 1171 * 1172 * All the data members below, except for @post_trigger, must be set 1173 * for each event command. 1174 * 1175 * @name: The unique name that identifies the event command. This is 1176 * the name used when setting triggers via trigger files. 1177 * 1178 * @trigger_type: A unique id that identifies the event command 1179 * 'type'. This value has two purposes, the first to ensure that 1180 * only one trigger of the same type can be set at a given time 1181 * for a particular event e.g. it doesn't make sense to have both 1182 * a traceon and traceoff trigger attached to a single event at 1183 * the same time, so traceon and traceoff have the same type 1184 * though they have different names. The @trigger_type value is 1185 * also used as a bit value for deferring the actual trigger 1186 * action until after the current event is finished. Some 1187 * commands need to do this if they themselves log to the trace 1188 * buffer (see the @post_trigger() member below). @trigger_type 1189 * values are defined by adding new values to the trigger_type 1190 * enum in include/linux/ftrace_event.h. 1191 * 1192 * @post_trigger: A flag that says whether or not this command needs 1193 * to have its action delayed until after the current event has 1194 * been closed. Some triggers need to avoid being invoked while 1195 * an event is currently in the process of being logged, since 1196 * the trigger may itself log data into the trace buffer. Thus 1197 * we make sure the current event is committed before invoking 1198 * those triggers. To do that, the trigger invocation is split 1199 * in two - the first part checks the filter using the current 1200 * trace record; if a command has the @post_trigger flag set, it 1201 * sets a bit for itself in the return value, otherwise it 1202 * directly invokes the trigger. Once all commands have been 1203 * either invoked or set their return flag, the current record is 1204 * either committed or discarded. At that point, if any commands 1205 * have deferred their triggers, those commands are finally 1206 * invoked following the close of the current event. In other 1207 * words, if the event_trigger_ops @func() probe implementation 1208 * itself logs to the trace buffer, this flag should be set, 1209 * otherwise it can be left unspecified. 1210 * 1211 * All the methods below, except for @set_filter(), must be 1212 * implemented. 1213 * 1214 * @func: The callback function responsible for parsing and 1215 * registering the trigger written to the 'trigger' file by the 1216 * user. It allocates the trigger instance and registers it with 1217 * the appropriate trace event. It makes use of the other 1218 * event_command callback functions to orchestrate this, and is 1219 * usually implemented by the generic utility function 1220 * @event_trigger_callback() (see trace_event_triggers.c). 1221 * 1222 * @reg: Adds the trigger to the list of triggers associated with the 1223 * event, and enables the event trigger itself, after 1224 * initializing it (via the event_trigger_ops @init() function). 1225 * This is also where commands can use the @trigger_type value to 1226 * make the decision as to whether or not multiple instances of 1227 * the trigger should be allowed. This is usually implemented by 1228 * the generic utility function @register_trigger() (see 1229 * trace_event_triggers.c). 1230 * 1231 * @unreg: Removes the trigger from the list of triggers associated 1232 * with the event, and disables the event trigger itself, after 1233 * initializing it (via the event_trigger_ops @free() function). 1234 * This is usually implemented by the generic utility function 1235 * @unregister_trigger() (see trace_event_triggers.c). 1236 * 1237 * @set_filter: An optional function called to parse and set a filter 1238 * for the trigger. If no @set_filter() method is set for the 1239 * event command, filters set by the user for the command will be 1240 * ignored. This is usually implemented by the generic utility 1241 * function @set_trigger_filter() (see trace_event_triggers.c). 1242 * 1243 * @get_trigger_ops: The callback function invoked to retrieve the 1244 * event_trigger_ops implementation associated with the command. 1245 */ 1246 struct event_command { 1247 struct list_head list; 1248 char *name; 1249 enum event_trigger_type trigger_type; 1250 bool post_trigger; 1251 int (*func)(struct event_command *cmd_ops, 1252 struct ftrace_event_file *file, 1253 char *glob, char *cmd, char *params); 1254 int (*reg)(char *glob, 1255 struct event_trigger_ops *ops, 1256 struct event_trigger_data *data, 1257 struct ftrace_event_file *file); 1258 void (*unreg)(char *glob, 1259 struct event_trigger_ops *ops, 1260 struct event_trigger_data *data, 1261 struct ftrace_event_file *file); 1262 int (*set_filter)(char *filter_str, 1263 struct event_trigger_data *data, 1264 struct ftrace_event_file *file); 1265 struct event_trigger_ops *(*get_trigger_ops)(char *cmd, char *param); 1266 }; 1267 1268 extern int trace_event_enable_disable(struct ftrace_event_file *file, 1269 int enable, int soft_disable); 1270 extern int tracing_alloc_snapshot(void); 1271 1272 extern const char *__start___trace_bprintk_fmt[]; 1273 extern const char *__stop___trace_bprintk_fmt[]; 1274 1275 extern const char *__start___tracepoint_str[]; 1276 extern const char *__stop___tracepoint_str[]; 1277 1278 void trace_printk_init_buffers(void); 1279 void trace_printk_start_comm(void); 1280 int trace_keep_overwrite(struct tracer *tracer, u32 mask, int set); 1281 int set_tracer_flag(struct trace_array *tr, unsigned int mask, int enabled); 1282 1283 /* 1284 * Normal trace_printk() and friends allocates special buffers 1285 * to do the manipulation, as well as saves the print formats 1286 * into sections to display. But the trace infrastructure wants 1287 * to use these without the added overhead at the price of being 1288 * a bit slower (used mainly for warnings, where we don't care 1289 * about performance). The internal_trace_puts() is for such 1290 * a purpose. 1291 */ 1292 #define internal_trace_puts(str) __trace_puts(_THIS_IP_, str, strlen(str)) 1293 1294 #undef FTRACE_ENTRY 1295 #define FTRACE_ENTRY(call, struct_name, id, tstruct, print, filter) \ 1296 extern struct ftrace_event_call \ 1297 __aligned(4) event_##call; 1298 #undef FTRACE_ENTRY_DUP 1299 #define FTRACE_ENTRY_DUP(call, struct_name, id, tstruct, print, filter) \ 1300 FTRACE_ENTRY(call, struct_name, id, PARAMS(tstruct), PARAMS(print), \ 1301 filter) 1302 #include "trace_entries.h" 1303 1304 #if defined(CONFIG_PERF_EVENTS) && defined(CONFIG_FUNCTION_TRACER) 1305 int perf_ftrace_event_register(struct ftrace_event_call *call, 1306 enum trace_reg type, void *data); 1307 #else 1308 #define perf_ftrace_event_register NULL 1309 #endif 1310 1311 #endif /* _LINUX_KERNEL_TRACE_H */ 1312