1 #ifndef _LINUX_KERNEL_TRACE_H
2 #define _LINUX_KERNEL_TRACE_H
5 #include <linux/atomic.h>
6 #include <linux/sched.h>
7 #include <linux/clocksource.h>
8 #include <linux/ring_buffer.h>
9 #include <linux/mmiotrace.h>
10 #include <linux/tracepoint.h>
11 #include <linux/ftrace.h>
12 #include <linux/hw_breakpoint.h>
13 #include <linux/trace_seq.h>
14 #include <linux/ftrace_event.h>
17 __TRACE_FIRST_TYPE = 0,
38 #define __field(type, item) type item;
41 #define __field_struct(type, item) __field(type, item)
44 #define __field_desc(type, container, item)
47 #define __array(type, item, size) type item[size];
50 #define __array_desc(type, container, item, size)
52 #undef __dynamic_array
53 #define __dynamic_array(type, item) type item[];
56 #define F_STRUCT(args...) args
59 #define FTRACE_ENTRY(name, struct_name, id, tstruct, print) \
60 struct struct_name { \
61 struct trace_entry ent; \
66 #define TP_ARGS(args...) args
68 #undef FTRACE_ENTRY_DUP
69 #define FTRACE_ENTRY_DUP(name, name_struct, id, tstruct, printk)
71 #include "trace_entries.h"
74 * syscalls are special, and need special handling, this is why
75 * they are not included in trace_entries.h
77 struct syscall_trace_enter {
78 struct trace_entry ent;
83 struct syscall_trace_exit {
84 struct trace_entry ent;
89 struct kprobe_trace_entry_head {
90 struct trace_entry ent;
94 struct kretprobe_trace_entry_head {
95 struct trace_entry ent;
101 * trace_flag_type is an enumeration that holds different
102 * states when a trace occurs. These are:
103 * IRQS_OFF - interrupts were disabled
104 * IRQS_NOSUPPORT - arch does not support irqs_disabled_flags
105 * NEED_RESCHED - reschedule is requested
106 * HARDIRQ - inside an interrupt handler
107 * SOFTIRQ - inside a softirq handler
109 enum trace_flag_type {
110 TRACE_FLAG_IRQS_OFF = 0x01,
111 TRACE_FLAG_IRQS_NOSUPPORT = 0x02,
112 TRACE_FLAG_NEED_RESCHED = 0x04,
113 TRACE_FLAG_HARDIRQ = 0x08,
114 TRACE_FLAG_SOFTIRQ = 0x10,
117 #define TRACE_BUF_SIZE 1024
120 * The CPU trace array - it consists of thousands of trace entries
121 * plus some other descriptor data: (for example which task started
124 struct trace_array_cpu {
126 void *buffer_page; /* ring buffer spare */
128 unsigned long saved_latency;
129 unsigned long critical_start;
130 unsigned long critical_end;
131 unsigned long critical_sequence;
133 unsigned long policy;
134 unsigned long rt_priority;
135 unsigned long skipped_entries;
136 cycle_t preempt_timestamp;
139 char comm[TASK_COMM_LEN];
143 * The trace array - an array of per-CPU trace arrays. This is the
144 * highest level data structure that individual tracers deal with.
145 * They have on/off state as well:
148 struct ring_buffer *buffer;
149 unsigned long entries;
152 struct task_struct *waiter;
153 struct trace_array_cpu *data[NR_CPUS];
156 #define FTRACE_CMP_TYPE(var, type) \
157 __builtin_types_compatible_p(typeof(var), type *)
160 #define IF_ASSIGN(var, entry, etype, id) \
161 if (FTRACE_CMP_TYPE(var, etype)) { \
162 var = (typeof(var))(entry); \
163 WARN_ON(id && (entry)->type != id); \
167 /* Will cause compile errors if type is not found. */
168 extern void __ftrace_bad_type(void);
171 * The trace_assign_type is a verifier that the entry type is
172 * the same as the type being assigned. To add new types simply
173 * add a line with the following format:
175 * IF_ASSIGN(var, ent, type, id);
177 * Where "type" is the trace type that includes the trace_entry
178 * as the "ent" item. And "id" is the trace identifier that is
179 * used in the trace_type enum.
181 * If the type can have more than one id, then use zero.
183 #define trace_assign_type(var, ent) \
185 IF_ASSIGN(var, ent, struct ftrace_entry, TRACE_FN); \
186 IF_ASSIGN(var, ent, struct ctx_switch_entry, 0); \
187 IF_ASSIGN(var, ent, struct stack_entry, TRACE_STACK); \
188 IF_ASSIGN(var, ent, struct userstack_entry, TRACE_USER_STACK);\
189 IF_ASSIGN(var, ent, struct print_entry, TRACE_PRINT); \
190 IF_ASSIGN(var, ent, struct bprint_entry, TRACE_BPRINT); \
191 IF_ASSIGN(var, ent, struct trace_mmiotrace_rw, \
193 IF_ASSIGN(var, ent, struct trace_mmiotrace_map, \
195 IF_ASSIGN(var, ent, struct trace_branch, TRACE_BRANCH); \
196 IF_ASSIGN(var, ent, struct ftrace_graph_ent_entry, \
198 IF_ASSIGN(var, ent, struct ftrace_graph_ret_entry, \
200 __ftrace_bad_type(); \
204 * An option specific to a tracer. This is a boolean value.
205 * The bit is the bit index that sets its value on the
206 * flags value in struct tracer_flags.
209 const char *name; /* Will appear on the trace_options file */
210 u32 bit; /* Mask assigned in val field in tracer_flags */
214 * The set of specific options for a tracer. Your tracer
215 * have to set the initial value of the flags val.
217 struct tracer_flags {
219 struct tracer_opt *opts;
222 /* Makes more easy to define a tracer opt */
223 #define TRACER_OPT(s, b) .name = #s, .bit = b
227 * struct tracer - a specific tracer and its callbacks to interact with debugfs
228 * @name: the name chosen to select it on the available_tracers file
229 * @init: called when one switches to this tracer (echo name > current_tracer)
230 * @reset: called when one switches to another tracer
231 * @start: called when tracing is unpaused (echo 1 > tracing_enabled)
232 * @stop: called when tracing is paused (echo 0 > tracing_enabled)
233 * @open: called when the trace file is opened
234 * @pipe_open: called when the trace_pipe file is opened
235 * @wait_pipe: override how the user waits for traces on trace_pipe
236 * @close: called when the trace file is released
237 * @pipe_close: called when the trace_pipe file is released
238 * @read: override the default read callback on trace_pipe
239 * @splice_read: override the default splice_read callback on trace_pipe
240 * @selftest: selftest to run on boot (see trace_selftest.c)
241 * @print_headers: override the first lines that describe your columns
242 * @print_line: callback that prints a trace
243 * @set_flag: signals one of your private flags changed (trace_options file)
244 * @flags: your private flags
248 int (*init)(struct trace_array *tr);
249 void (*reset)(struct trace_array *tr);
250 void (*start)(struct trace_array *tr);
251 void (*stop)(struct trace_array *tr);
252 void (*open)(struct trace_iterator *iter);
253 void (*pipe_open)(struct trace_iterator *iter);
254 void (*wait_pipe)(struct trace_iterator *iter);
255 void (*close)(struct trace_iterator *iter);
256 void (*pipe_close)(struct trace_iterator *iter);
257 ssize_t (*read)(struct trace_iterator *iter,
258 struct file *filp, char __user *ubuf,
259 size_t cnt, loff_t *ppos);
260 ssize_t (*splice_read)(struct trace_iterator *iter,
263 struct pipe_inode_info *pipe,
266 #ifdef CONFIG_FTRACE_STARTUP_TEST
267 int (*selftest)(struct tracer *trace,
268 struct trace_array *tr);
270 void (*print_header)(struct seq_file *m);
271 enum print_line_t (*print_line)(struct trace_iterator *iter);
272 /* If you handled the flag setting, return 0 */
273 int (*set_flag)(u32 old_flags, u32 bit, int set);
274 /* Return 0 if OK with change, else return non-zero */
275 int (*flag_changed)(struct tracer *tracer,
278 struct tracer_flags *flags;
285 /* Only current can touch trace_recursion */
286 #define trace_recursion_inc() do { (current)->trace_recursion++; } while (0)
287 #define trace_recursion_dec() do { (current)->trace_recursion--; } while (0)
289 /* Ring buffer has the 10 LSB bits to count */
290 #define trace_recursion_buffer() ((current)->trace_recursion & 0x3ff)
292 /* for function tracing recursion */
293 #define TRACE_INTERNAL_BIT (1<<11)
294 #define TRACE_GLOBAL_BIT (1<<12)
296 * Abuse of the trace_recursion.
297 * As we need a way to maintain state if we are tracing the function
298 * graph in irq because we want to trace a particular function that
299 * was called in irq context but we have irq tracing off. Since this
300 * can only be modified by current, we can reuse trace_recursion.
302 #define TRACE_IRQ_BIT (1<<13)
304 #define trace_recursion_set(bit) do { (current)->trace_recursion |= (bit); } while (0)
305 #define trace_recursion_clear(bit) do { (current)->trace_recursion &= ~(bit); } while (0)
306 #define trace_recursion_test(bit) ((current)->trace_recursion & (bit))
308 #define TRACE_PIPE_ALL_CPU -1
310 int tracer_init(struct tracer *t, struct trace_array *tr);
311 int tracing_is_enabled(void);
312 void trace_wake_up(void);
313 void tracing_reset(struct trace_array *tr, int cpu);
314 void tracing_reset_online_cpus(struct trace_array *tr);
315 void tracing_reset_current(int cpu);
316 void tracing_reset_current_online_cpus(void);
317 int tracing_open_generic(struct inode *inode, struct file *filp);
318 struct dentry *trace_create_file(const char *name,
320 struct dentry *parent,
322 const struct file_operations *fops);
324 struct dentry *tracing_init_dentry(void);
326 struct ring_buffer_event;
328 struct ring_buffer_event *
329 trace_buffer_lock_reserve(struct ring_buffer *buffer,
334 void trace_buffer_unlock_commit(struct ring_buffer *buffer,
335 struct ring_buffer_event *event,
336 unsigned long flags, int pc);
338 struct trace_entry *tracing_get_trace_entry(struct trace_array *tr,
339 struct trace_array_cpu *data);
341 struct trace_entry *trace_find_next_entry(struct trace_iterator *iter,
342 int *ent_cpu, u64 *ent_ts);
344 int trace_empty(struct trace_iterator *iter);
346 void *trace_find_next_entry_inc(struct trace_iterator *iter);
348 void trace_init_global_iter(struct trace_iterator *iter);
350 void tracing_iter_reset(struct trace_iterator *iter, int cpu);
352 void default_wait_pipe(struct trace_iterator *iter);
353 void poll_wait_pipe(struct trace_iterator *iter);
355 void ftrace(struct trace_array *tr,
356 struct trace_array_cpu *data,
358 unsigned long parent_ip,
359 unsigned long flags, int pc);
360 void tracing_sched_switch_trace(struct trace_array *tr,
361 struct task_struct *prev,
362 struct task_struct *next,
363 unsigned long flags, int pc);
365 void tracing_sched_wakeup_trace(struct trace_array *tr,
366 struct task_struct *wakee,
367 struct task_struct *cur,
368 unsigned long flags, int pc);
369 void trace_function(struct trace_array *tr,
371 unsigned long parent_ip,
372 unsigned long flags, int pc);
373 void trace_graph_function(struct trace_array *tr,
375 unsigned long parent_ip,
376 unsigned long flags, int pc);
377 void trace_default_header(struct seq_file *m);
378 void print_trace_header(struct seq_file *m, struct trace_iterator *iter);
379 int trace_empty(struct trace_iterator *iter);
381 void trace_graph_return(struct ftrace_graph_ret *trace);
382 int trace_graph_entry(struct ftrace_graph_ent *trace);
383 void set_graph_array(struct trace_array *tr);
385 void tracing_start_cmdline_record(void);
386 void tracing_stop_cmdline_record(void);
387 void tracing_sched_switch_assign_trace(struct trace_array *tr);
388 void tracing_stop_sched_switch_record(void);
389 void tracing_start_sched_switch_record(void);
390 int register_tracer(struct tracer *type);
391 void unregister_tracer(struct tracer *type);
392 int is_tracing_stopped(void);
393 enum trace_file_type {
394 TRACE_FILE_LAT_FMT = 1,
395 TRACE_FILE_ANNOTATE = 2,
398 extern cpumask_var_t __read_mostly tracing_buffer_mask;
400 #define for_each_tracing_cpu(cpu) \
401 for_each_cpu(cpu, tracing_buffer_mask)
403 extern unsigned long nsecs_to_usecs(unsigned long nsecs);
405 extern unsigned long tracing_thresh;
407 #ifdef CONFIG_TRACER_MAX_TRACE
408 extern unsigned long tracing_max_latency;
410 void update_max_tr(struct trace_array *tr, struct task_struct *tsk, int cpu);
411 void update_max_tr_single(struct trace_array *tr,
412 struct task_struct *tsk, int cpu);
413 #endif /* CONFIG_TRACER_MAX_TRACE */
415 #ifdef CONFIG_STACKTRACE
416 void ftrace_trace_stack(struct ring_buffer *buffer, unsigned long flags,
419 void ftrace_trace_stack_regs(struct ring_buffer *buffer, unsigned long flags,
420 int skip, int pc, struct pt_regs *regs);
422 void ftrace_trace_userstack(struct ring_buffer *buffer, unsigned long flags,
425 void __trace_stack(struct trace_array *tr, unsigned long flags, int skip,
428 static inline void ftrace_trace_stack(struct ring_buffer *buffer,
429 unsigned long flags, int skip, int pc)
433 static inline void ftrace_trace_stack_regs(struct ring_buffer *buffer,
434 unsigned long flags, int skip,
435 int pc, struct pt_regs *regs)
439 static inline void ftrace_trace_userstack(struct ring_buffer *buffer,
440 unsigned long flags, int pc)
444 static inline void __trace_stack(struct trace_array *tr, unsigned long flags,
448 #endif /* CONFIG_STACKTRACE */
450 extern cycle_t ftrace_now(int cpu);
452 extern void trace_find_cmdline(int pid, char comm[]);
454 #ifdef CONFIG_DYNAMIC_FTRACE
455 extern unsigned long ftrace_update_tot_cnt;
456 #define DYN_FTRACE_TEST_NAME trace_selftest_dynamic_test_func
457 extern int DYN_FTRACE_TEST_NAME(void);
458 #define DYN_FTRACE_TEST_NAME2 trace_selftest_dynamic_test_func2
459 extern int DYN_FTRACE_TEST_NAME2(void);
462 extern int ring_buffer_expanded;
463 extern bool tracing_selftest_disabled;
464 DECLARE_PER_CPU(int, ftrace_cpu_disabled);
466 #ifdef CONFIG_FTRACE_STARTUP_TEST
467 extern int trace_selftest_startup_function(struct tracer *trace,
468 struct trace_array *tr);
469 extern int trace_selftest_startup_function_graph(struct tracer *trace,
470 struct trace_array *tr);
471 extern int trace_selftest_startup_irqsoff(struct tracer *trace,
472 struct trace_array *tr);
473 extern int trace_selftest_startup_preemptoff(struct tracer *trace,
474 struct trace_array *tr);
475 extern int trace_selftest_startup_preemptirqsoff(struct tracer *trace,
476 struct trace_array *tr);
477 extern int trace_selftest_startup_wakeup(struct tracer *trace,
478 struct trace_array *tr);
479 extern int trace_selftest_startup_nop(struct tracer *trace,
480 struct trace_array *tr);
481 extern int trace_selftest_startup_sched_switch(struct tracer *trace,
482 struct trace_array *tr);
483 extern int trace_selftest_startup_branch(struct tracer *trace,
484 struct trace_array *tr);
485 #endif /* CONFIG_FTRACE_STARTUP_TEST */
487 extern void *head_page(struct trace_array_cpu *data);
488 extern unsigned long long ns2usecs(cycle_t nsec);
490 trace_vbprintk(unsigned long ip, const char *fmt, va_list args);
492 trace_vprintk(unsigned long ip, const char *fmt, va_list args);
494 trace_array_vprintk(struct trace_array *tr,
495 unsigned long ip, const char *fmt, va_list args);
496 int trace_array_printk(struct trace_array *tr,
497 unsigned long ip, const char *fmt, ...);
498 void trace_printk_seq(struct trace_seq *s);
499 enum print_line_t print_trace_line(struct trace_iterator *iter);
501 extern unsigned long trace_flags;
503 extern int trace_clock_id;
505 /* Standard output formatting function used for function return traces */
506 #ifdef CONFIG_FUNCTION_GRAPH_TRACER
509 #define TRACE_GRAPH_PRINT_OVERRUN 0x1
510 #define TRACE_GRAPH_PRINT_CPU 0x2
511 #define TRACE_GRAPH_PRINT_OVERHEAD 0x4
512 #define TRACE_GRAPH_PRINT_PROC 0x8
513 #define TRACE_GRAPH_PRINT_DURATION 0x10
514 #define TRACE_GRAPH_PRINT_ABS_TIME 0x20
516 extern enum print_line_t
517 print_graph_function_flags(struct trace_iterator *iter, u32 flags);
518 extern void print_graph_headers_flags(struct seq_file *s, u32 flags);
519 extern enum print_line_t
520 trace_print_graph_duration(unsigned long long duration, struct trace_seq *s);
521 extern void graph_trace_open(struct trace_iterator *iter);
522 extern void graph_trace_close(struct trace_iterator *iter);
523 extern int __trace_graph_entry(struct trace_array *tr,
524 struct ftrace_graph_ent *trace,
525 unsigned long flags, int pc);
526 extern void __trace_graph_return(struct trace_array *tr,
527 struct ftrace_graph_ret *trace,
528 unsigned long flags, int pc);
531 #ifdef CONFIG_DYNAMIC_FTRACE
532 /* TODO: make this variable */
533 #define FTRACE_GRAPH_MAX_FUNCS 32
534 extern int ftrace_graph_filter_enabled;
535 extern int ftrace_graph_count;
536 extern unsigned long ftrace_graph_funcs[FTRACE_GRAPH_MAX_FUNCS];
538 static inline int ftrace_graph_addr(unsigned long addr)
542 if (!ftrace_graph_filter_enabled)
545 for (i = 0; i < ftrace_graph_count; i++) {
546 if (addr == ftrace_graph_funcs[i]) {
548 * If no irqs are to be traced, but a set_graph_function
549 * is set, and called by an interrupt handler, we still
553 trace_recursion_set(TRACE_IRQ_BIT);
555 trace_recursion_clear(TRACE_IRQ_BIT);
563 static inline int ftrace_graph_addr(unsigned long addr)
567 #endif /* CONFIG_DYNAMIC_FTRACE */
568 #else /* CONFIG_FUNCTION_GRAPH_TRACER */
569 static inline enum print_line_t
570 print_graph_function_flags(struct trace_iterator *iter, u32 flags)
572 return TRACE_TYPE_UNHANDLED;
574 #endif /* CONFIG_FUNCTION_GRAPH_TRACER */
576 extern struct list_head ftrace_pids;
578 #ifdef CONFIG_FUNCTION_TRACER
579 static inline int ftrace_trace_task(struct task_struct *task)
581 if (list_empty(&ftrace_pids))
584 return test_tsk_trace_trace(task);
586 extern int ftrace_is_dead(void);
588 static inline int ftrace_trace_task(struct task_struct *task)
592 static inline int ftrace_is_dead(void) { return 0; }
596 * struct trace_parser - servers for reading the user input separated by spaces
597 * @cont: set if the input is not complete - no final space char was found
598 * @buffer: holds the parsed user input
599 * @idx: user input length
602 struct trace_parser {
609 static inline bool trace_parser_loaded(struct trace_parser *parser)
611 return (parser->idx != 0);
614 static inline bool trace_parser_cont(struct trace_parser *parser)
619 static inline void trace_parser_clear(struct trace_parser *parser)
621 parser->cont = false;
625 extern int trace_parser_get_init(struct trace_parser *parser, int size);
626 extern void trace_parser_put(struct trace_parser *parser);
627 extern int trace_get_user(struct trace_parser *parser, const char __user *ubuf,
628 size_t cnt, loff_t *ppos);
631 * trace_iterator_flags is an enumeration that defines bit
632 * positions into trace_flags that controls the output.
634 * NOTE: These bits must match the trace_options array in
637 enum trace_iterator_flags {
638 TRACE_ITER_PRINT_PARENT = 0x01,
639 TRACE_ITER_SYM_OFFSET = 0x02,
640 TRACE_ITER_SYM_ADDR = 0x04,
641 TRACE_ITER_VERBOSE = 0x08,
642 TRACE_ITER_RAW = 0x10,
643 TRACE_ITER_HEX = 0x20,
644 TRACE_ITER_BIN = 0x40,
645 TRACE_ITER_BLOCK = 0x80,
646 TRACE_ITER_STACKTRACE = 0x100,
647 TRACE_ITER_PRINTK = 0x200,
648 TRACE_ITER_PREEMPTONLY = 0x400,
649 TRACE_ITER_BRANCH = 0x800,
650 TRACE_ITER_ANNOTATE = 0x1000,
651 TRACE_ITER_USERSTACKTRACE = 0x2000,
652 TRACE_ITER_SYM_USEROBJ = 0x4000,
653 TRACE_ITER_PRINTK_MSGONLY = 0x8000,
654 TRACE_ITER_CONTEXT_INFO = 0x10000, /* Print pid/cpu/time */
655 TRACE_ITER_LATENCY_FMT = 0x20000,
656 TRACE_ITER_SLEEP_TIME = 0x40000,
657 TRACE_ITER_GRAPH_TIME = 0x80000,
658 TRACE_ITER_RECORD_CMD = 0x100000,
659 TRACE_ITER_OVERWRITE = 0x200000,
660 TRACE_ITER_STOP_ON_FREE = 0x400000,
664 * TRACE_ITER_SYM_MASK masks the options in trace_flags that
665 * control the output of kernel symbols.
667 #define TRACE_ITER_SYM_MASK \
668 (TRACE_ITER_PRINT_PARENT|TRACE_ITER_SYM_OFFSET|TRACE_ITER_SYM_ADDR)
670 extern struct tracer nop_trace;
672 #ifdef CONFIG_BRANCH_TRACER
673 extern int enable_branch_tracing(struct trace_array *tr);
674 extern void disable_branch_tracing(void);
675 static inline int trace_branch_enable(struct trace_array *tr)
677 if (trace_flags & TRACE_ITER_BRANCH)
678 return enable_branch_tracing(tr);
681 static inline void trace_branch_disable(void)
683 /* due to races, always disable */
684 disable_branch_tracing();
687 static inline int trace_branch_enable(struct trace_array *tr)
691 static inline void trace_branch_disable(void)
694 #endif /* CONFIG_BRANCH_TRACER */
696 /* set ring buffers to default size if not already done so */
697 int tracing_update_buffers(void);
699 /* trace event type bit fields, not numeric */
701 TRACE_EVENT_TYPE_PRINTF = 1,
702 TRACE_EVENT_TYPE_RAW = 2,
705 struct ftrace_event_field {
706 struct list_head link;
715 struct event_filter {
716 int n_preds; /* Number assigned */
717 int a_preds; /* allocated */
718 struct filter_pred *preds;
719 struct filter_pred *root;
723 struct event_subsystem {
724 struct list_head list;
726 struct dentry *entry;
727 struct event_filter *filter;
732 #define FILTER_PRED_INVALID ((unsigned short)-1)
733 #define FILTER_PRED_IS_RIGHT (1 << 15)
734 #define FILTER_PRED_FOLD (1 << 15)
737 * The max preds is the size of unsigned short with
738 * two flags at the MSBs. One bit is used for both the IS_RIGHT
739 * and FOLD flags. The other is reserved.
741 * 2^14 preds is way more than enough.
743 #define MAX_FILTER_PRED 16384
748 typedef int (*filter_pred_fn_t) (struct filter_pred *pred, void *event);
750 typedef int (*regex_match_func)(char *str, struct regex *r, int len);
760 char pattern[MAX_FILTER_STR_VAL];
763 regex_match_func match;
771 #ifdef CONFIG_FTRACE_STARTUP_TEST
772 struct ftrace_event_field *field;
777 unsigned short index;
778 unsigned short parent;
780 unsigned short right;
783 extern struct list_head ftrace_common_fields;
785 extern enum regex_type
786 filter_parse_regex(char *buff, int len, char **search, int *not);
787 extern void print_event_filter(struct ftrace_event_call *call,
788 struct trace_seq *s);
789 extern int apply_event_filter(struct ftrace_event_call *call,
790 char *filter_string);
791 extern int apply_subsystem_event_filter(struct event_subsystem *system,
792 char *filter_string);
793 extern void print_subsystem_event_filter(struct event_subsystem *system,
794 struct trace_seq *s);
795 extern int filter_assign_type(const char *type);
798 trace_get_fields(struct ftrace_event_call *event_call);
801 filter_check_discard(struct ftrace_event_call *call, void *rec,
802 struct ring_buffer *buffer,
803 struct ring_buffer_event *event)
805 if (unlikely(call->flags & TRACE_EVENT_FL_FILTERED) &&
806 !filter_match_preds(call->filter, rec)) {
807 ring_buffer_discard_commit(buffer, event);
814 extern void trace_event_enable_cmd_record(bool enable);
816 extern struct mutex event_mutex;
817 extern struct list_head ftrace_events;
819 extern const char *__start___trace_bprintk_fmt[];
820 extern const char *__stop___trace_bprintk_fmt[];
822 int trace_keep_overwrite(struct tracer *tracer, u32 mask, int set);
823 int set_tracer_flag(unsigned int mask, int enabled);
826 #define FTRACE_ENTRY(call, struct_name, id, tstruct, print) \
827 extern struct ftrace_event_call \
828 __attribute__((__aligned__(4))) event_##call;
829 #undef FTRACE_ENTRY_DUP
830 #define FTRACE_ENTRY_DUP(call, struct_name, id, tstruct, print) \
831 FTRACE_ENTRY(call, struct_name, id, PARAMS(tstruct), PARAMS(print))
832 #include "trace_entries.h"
834 #endif /* _LINUX_KERNEL_TRACE_H */