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, filter) \
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, filter)
71 #undef FTRACE_ENTRY_REG
72 #define FTRACE_ENTRY_REG(name, struct_name, id, tstruct, print, \
74 FTRACE_ENTRY(name, struct_name, id, PARAMS(tstruct), PARAMS(print), \
77 #include "trace_entries.h"
80 * syscalls are special, and need special handling, this is why
81 * they are not included in trace_entries.h
83 struct syscall_trace_enter {
84 struct trace_entry ent;
89 struct syscall_trace_exit {
90 struct trace_entry ent;
95 struct kprobe_trace_entry_head {
96 struct trace_entry ent;
100 struct kretprobe_trace_entry_head {
101 struct trace_entry ent;
103 unsigned long ret_ip;
107 * trace_flag_type is an enumeration that holds different
108 * states when a trace occurs. These are:
109 * IRQS_OFF - interrupts were disabled
110 * IRQS_NOSUPPORT - arch does not support irqs_disabled_flags
111 * NEED_RESCHED - reschedule is requested
112 * HARDIRQ - inside an interrupt handler
113 * SOFTIRQ - inside a softirq handler
115 enum trace_flag_type {
116 TRACE_FLAG_IRQS_OFF = 0x01,
117 TRACE_FLAG_IRQS_NOSUPPORT = 0x02,
118 TRACE_FLAG_NEED_RESCHED = 0x04,
119 TRACE_FLAG_HARDIRQ = 0x08,
120 TRACE_FLAG_SOFTIRQ = 0x10,
123 #define TRACE_BUF_SIZE 1024
126 * The CPU trace array - it consists of thousands of trace entries
127 * plus some other descriptor data: (for example which task started
130 struct trace_array_cpu {
132 void *buffer_page; /* ring buffer spare */
134 unsigned long saved_latency;
135 unsigned long critical_start;
136 unsigned long critical_end;
137 unsigned long critical_sequence;
139 unsigned long policy;
140 unsigned long rt_priority;
141 unsigned long skipped_entries;
142 cycle_t preempt_timestamp;
145 char comm[TASK_COMM_LEN];
149 * The trace array - an array of per-CPU trace arrays. This is the
150 * highest level data structure that individual tracers deal with.
151 * They have on/off state as well:
154 struct ring_buffer *buffer;
155 unsigned long entries;
158 struct task_struct *waiter;
159 struct trace_array_cpu *data[NR_CPUS];
162 #define FTRACE_CMP_TYPE(var, type) \
163 __builtin_types_compatible_p(typeof(var), type *)
166 #define IF_ASSIGN(var, entry, etype, id) \
167 if (FTRACE_CMP_TYPE(var, etype)) { \
168 var = (typeof(var))(entry); \
169 WARN_ON(id && (entry)->type != id); \
173 /* Will cause compile errors if type is not found. */
174 extern void __ftrace_bad_type(void);
177 * The trace_assign_type is a verifier that the entry type is
178 * the same as the type being assigned. To add new types simply
179 * add a line with the following format:
181 * IF_ASSIGN(var, ent, type, id);
183 * Where "type" is the trace type that includes the trace_entry
184 * as the "ent" item. And "id" is the trace identifier that is
185 * used in the trace_type enum.
187 * If the type can have more than one id, then use zero.
189 #define trace_assign_type(var, ent) \
191 IF_ASSIGN(var, ent, struct ftrace_entry, TRACE_FN); \
192 IF_ASSIGN(var, ent, struct ctx_switch_entry, 0); \
193 IF_ASSIGN(var, ent, struct stack_entry, TRACE_STACK); \
194 IF_ASSIGN(var, ent, struct userstack_entry, TRACE_USER_STACK);\
195 IF_ASSIGN(var, ent, struct print_entry, TRACE_PRINT); \
196 IF_ASSIGN(var, ent, struct bprint_entry, TRACE_BPRINT); \
197 IF_ASSIGN(var, ent, struct trace_mmiotrace_rw, \
199 IF_ASSIGN(var, ent, struct trace_mmiotrace_map, \
201 IF_ASSIGN(var, ent, struct trace_branch, TRACE_BRANCH); \
202 IF_ASSIGN(var, ent, struct ftrace_graph_ent_entry, \
204 IF_ASSIGN(var, ent, struct ftrace_graph_ret_entry, \
206 __ftrace_bad_type(); \
210 * An option specific to a tracer. This is a boolean value.
211 * The bit is the bit index that sets its value on the
212 * flags value in struct tracer_flags.
215 const char *name; /* Will appear on the trace_options file */
216 u32 bit; /* Mask assigned in val field in tracer_flags */
220 * The set of specific options for a tracer. Your tracer
221 * have to set the initial value of the flags val.
223 struct tracer_flags {
225 struct tracer_opt *opts;
228 /* Makes more easy to define a tracer opt */
229 #define TRACER_OPT(s, b) .name = #s, .bit = b
233 * struct tracer - a specific tracer and its callbacks to interact with debugfs
234 * @name: the name chosen to select it on the available_tracers file
235 * @init: called when one switches to this tracer (echo name > current_tracer)
236 * @reset: called when one switches to another tracer
237 * @start: called when tracing is unpaused (echo 1 > tracing_enabled)
238 * @stop: called when tracing is paused (echo 0 > tracing_enabled)
239 * @open: called when the trace file is opened
240 * @pipe_open: called when the trace_pipe file is opened
241 * @wait_pipe: override how the user waits for traces on trace_pipe
242 * @close: called when the trace file is released
243 * @pipe_close: called when the trace_pipe file is released
244 * @read: override the default read callback on trace_pipe
245 * @splice_read: override the default splice_read callback on trace_pipe
246 * @selftest: selftest to run on boot (see trace_selftest.c)
247 * @print_headers: override the first lines that describe your columns
248 * @print_line: callback that prints a trace
249 * @set_flag: signals one of your private flags changed (trace_options file)
250 * @flags: your private flags
254 int (*init)(struct trace_array *tr);
255 void (*reset)(struct trace_array *tr);
256 void (*start)(struct trace_array *tr);
257 void (*stop)(struct trace_array *tr);
258 void (*open)(struct trace_iterator *iter);
259 void (*pipe_open)(struct trace_iterator *iter);
260 void (*wait_pipe)(struct trace_iterator *iter);
261 void (*close)(struct trace_iterator *iter);
262 void (*pipe_close)(struct trace_iterator *iter);
263 ssize_t (*read)(struct trace_iterator *iter,
264 struct file *filp, char __user *ubuf,
265 size_t cnt, loff_t *ppos);
266 ssize_t (*splice_read)(struct trace_iterator *iter,
269 struct pipe_inode_info *pipe,
272 #ifdef CONFIG_FTRACE_STARTUP_TEST
273 int (*selftest)(struct tracer *trace,
274 struct trace_array *tr);
276 void (*print_header)(struct seq_file *m);
277 enum print_line_t (*print_line)(struct trace_iterator *iter);
278 /* If you handled the flag setting, return 0 */
279 int (*set_flag)(u32 old_flags, u32 bit, int set);
281 struct tracer_flags *flags;
287 /* Only current can touch trace_recursion */
288 #define trace_recursion_inc() do { (current)->trace_recursion++; } while (0)
289 #define trace_recursion_dec() do { (current)->trace_recursion--; } while (0)
291 /* Ring buffer has the 10 LSB bits to count */
292 #define trace_recursion_buffer() ((current)->trace_recursion & 0x3ff)
294 /* for function tracing recursion */
295 #define TRACE_INTERNAL_BIT (1<<11)
296 #define TRACE_GLOBAL_BIT (1<<12)
297 #define TRACE_CONTROL_BIT (1<<13)
300 * Abuse of the trace_recursion.
301 * As we need a way to maintain state if we are tracing the function
302 * graph in irq because we want to trace a particular function that
303 * was called in irq context but we have irq tracing off. Since this
304 * can only be modified by current, we can reuse trace_recursion.
306 #define TRACE_IRQ_BIT (1<<13)
308 #define trace_recursion_set(bit) do { (current)->trace_recursion |= (bit); } while (0)
309 #define trace_recursion_clear(bit) do { (current)->trace_recursion &= ~(bit); } while (0)
310 #define trace_recursion_test(bit) ((current)->trace_recursion & (bit))
312 #define TRACE_PIPE_ALL_CPU -1
314 int tracer_init(struct tracer *t, struct trace_array *tr);
315 int tracing_is_enabled(void);
316 void trace_wake_up(void);
317 void tracing_reset(struct trace_array *tr, int cpu);
318 void tracing_reset_online_cpus(struct trace_array *tr);
319 void tracing_reset_current(int cpu);
320 void tracing_reset_current_online_cpus(void);
321 int tracing_open_generic(struct inode *inode, struct file *filp);
322 struct dentry *trace_create_file(const char *name,
324 struct dentry *parent,
326 const struct file_operations *fops);
328 struct dentry *tracing_init_dentry(void);
330 struct ring_buffer_event;
332 struct ring_buffer_event *
333 trace_buffer_lock_reserve(struct ring_buffer *buffer,
338 void trace_buffer_unlock_commit(struct ring_buffer *buffer,
339 struct ring_buffer_event *event,
340 unsigned long flags, int pc);
342 struct trace_entry *tracing_get_trace_entry(struct trace_array *tr,
343 struct trace_array_cpu *data);
345 struct trace_entry *trace_find_next_entry(struct trace_iterator *iter,
346 int *ent_cpu, u64 *ent_ts);
348 int trace_empty(struct trace_iterator *iter);
350 void *trace_find_next_entry_inc(struct trace_iterator *iter);
352 void trace_init_global_iter(struct trace_iterator *iter);
354 void tracing_iter_reset(struct trace_iterator *iter, int cpu);
356 void default_wait_pipe(struct trace_iterator *iter);
357 void poll_wait_pipe(struct trace_iterator *iter);
359 void ftrace(struct trace_array *tr,
360 struct trace_array_cpu *data,
362 unsigned long parent_ip,
363 unsigned long flags, int pc);
364 void tracing_sched_switch_trace(struct trace_array *tr,
365 struct task_struct *prev,
366 struct task_struct *next,
367 unsigned long flags, int pc);
369 void tracing_sched_wakeup_trace(struct trace_array *tr,
370 struct task_struct *wakee,
371 struct task_struct *cur,
372 unsigned long flags, int pc);
373 void trace_function(struct trace_array *tr,
375 unsigned long parent_ip,
376 unsigned long flags, int pc);
377 void trace_graph_function(struct trace_array *tr,
379 unsigned long parent_ip,
380 unsigned long flags, int pc);
381 void trace_latency_header(struct seq_file *m);
382 void trace_default_header(struct seq_file *m);
383 void print_trace_header(struct seq_file *m, struct trace_iterator *iter);
384 int trace_empty(struct trace_iterator *iter);
386 void trace_graph_return(struct ftrace_graph_ret *trace);
387 int trace_graph_entry(struct ftrace_graph_ent *trace);
388 void set_graph_array(struct trace_array *tr);
390 void tracing_start_cmdline_record(void);
391 void tracing_stop_cmdline_record(void);
392 void tracing_sched_switch_assign_trace(struct trace_array *tr);
393 void tracing_stop_sched_switch_record(void);
394 void tracing_start_sched_switch_record(void);
395 int register_tracer(struct tracer *type);
396 void unregister_tracer(struct tracer *type);
397 int is_tracing_stopped(void);
398 enum trace_file_type {
399 TRACE_FILE_LAT_FMT = 1,
400 TRACE_FILE_ANNOTATE = 2,
403 extern cpumask_var_t __read_mostly tracing_buffer_mask;
405 #define for_each_tracing_cpu(cpu) \
406 for_each_cpu(cpu, tracing_buffer_mask)
408 extern unsigned long nsecs_to_usecs(unsigned long nsecs);
410 extern unsigned long tracing_thresh;
412 #ifdef CONFIG_TRACER_MAX_TRACE
413 extern unsigned long tracing_max_latency;
415 void update_max_tr(struct trace_array *tr, struct task_struct *tsk, int cpu);
416 void update_max_tr_single(struct trace_array *tr,
417 struct task_struct *tsk, int cpu);
418 #endif /* CONFIG_TRACER_MAX_TRACE */
420 #ifdef CONFIG_STACKTRACE
421 void ftrace_trace_stack(struct ring_buffer *buffer, unsigned long flags,
424 void ftrace_trace_stack_regs(struct ring_buffer *buffer, unsigned long flags,
425 int skip, int pc, struct pt_regs *regs);
427 void ftrace_trace_userstack(struct ring_buffer *buffer, unsigned long flags,
430 void __trace_stack(struct trace_array *tr, unsigned long flags, int skip,
433 static inline void ftrace_trace_stack(struct ring_buffer *buffer,
434 unsigned long flags, int skip, int pc)
438 static inline void ftrace_trace_stack_regs(struct ring_buffer *buffer,
439 unsigned long flags, int skip,
440 int pc, struct pt_regs *regs)
444 static inline void ftrace_trace_userstack(struct ring_buffer *buffer,
445 unsigned long flags, int pc)
449 static inline void __trace_stack(struct trace_array *tr, unsigned long flags,
453 #endif /* CONFIG_STACKTRACE */
455 extern cycle_t ftrace_now(int cpu);
457 extern void trace_find_cmdline(int pid, char comm[]);
459 #ifdef CONFIG_DYNAMIC_FTRACE
460 extern unsigned long ftrace_update_tot_cnt;
461 #define DYN_FTRACE_TEST_NAME trace_selftest_dynamic_test_func
462 extern int DYN_FTRACE_TEST_NAME(void);
463 #define DYN_FTRACE_TEST_NAME2 trace_selftest_dynamic_test_func2
464 extern int DYN_FTRACE_TEST_NAME2(void);
467 extern int ring_buffer_expanded;
468 extern bool tracing_selftest_disabled;
469 DECLARE_PER_CPU(int, ftrace_cpu_disabled);
471 #ifdef CONFIG_FTRACE_STARTUP_TEST
472 extern int trace_selftest_startup_function(struct tracer *trace,
473 struct trace_array *tr);
474 extern int trace_selftest_startup_function_graph(struct tracer *trace,
475 struct trace_array *tr);
476 extern int trace_selftest_startup_irqsoff(struct tracer *trace,
477 struct trace_array *tr);
478 extern int trace_selftest_startup_preemptoff(struct tracer *trace,
479 struct trace_array *tr);
480 extern int trace_selftest_startup_preemptirqsoff(struct tracer *trace,
481 struct trace_array *tr);
482 extern int trace_selftest_startup_wakeup(struct tracer *trace,
483 struct trace_array *tr);
484 extern int trace_selftest_startup_nop(struct tracer *trace,
485 struct trace_array *tr);
486 extern int trace_selftest_startup_sched_switch(struct tracer *trace,
487 struct trace_array *tr);
488 extern int trace_selftest_startup_branch(struct tracer *trace,
489 struct trace_array *tr);
490 #endif /* CONFIG_FTRACE_STARTUP_TEST */
492 extern void *head_page(struct trace_array_cpu *data);
493 extern unsigned long long ns2usecs(cycle_t nsec);
495 trace_vbprintk(unsigned long ip, const char *fmt, va_list args);
497 trace_vprintk(unsigned long ip, const char *fmt, va_list args);
499 trace_array_vprintk(struct trace_array *tr,
500 unsigned long ip, const char *fmt, va_list args);
501 int trace_array_printk(struct trace_array *tr,
502 unsigned long ip, const char *fmt, ...);
503 void trace_printk_seq(struct trace_seq *s);
504 enum print_line_t print_trace_line(struct trace_iterator *iter);
506 extern unsigned long trace_flags;
508 extern int trace_clock_id;
510 /* Standard output formatting function used for function return traces */
511 #ifdef CONFIG_FUNCTION_GRAPH_TRACER
514 #define TRACE_GRAPH_PRINT_OVERRUN 0x1
515 #define TRACE_GRAPH_PRINT_CPU 0x2
516 #define TRACE_GRAPH_PRINT_OVERHEAD 0x4
517 #define TRACE_GRAPH_PRINT_PROC 0x8
518 #define TRACE_GRAPH_PRINT_DURATION 0x10
519 #define TRACE_GRAPH_PRINT_ABS_TIME 0x20
521 extern enum print_line_t
522 print_graph_function_flags(struct trace_iterator *iter, u32 flags);
523 extern void print_graph_headers_flags(struct seq_file *s, u32 flags);
524 extern enum print_line_t
525 trace_print_graph_duration(unsigned long long duration, struct trace_seq *s);
526 extern void graph_trace_open(struct trace_iterator *iter);
527 extern void graph_trace_close(struct trace_iterator *iter);
528 extern int __trace_graph_entry(struct trace_array *tr,
529 struct ftrace_graph_ent *trace,
530 unsigned long flags, int pc);
531 extern void __trace_graph_return(struct trace_array *tr,
532 struct ftrace_graph_ret *trace,
533 unsigned long flags, int pc);
536 #ifdef CONFIG_DYNAMIC_FTRACE
537 /* TODO: make this variable */
538 #define FTRACE_GRAPH_MAX_FUNCS 32
539 extern int ftrace_graph_filter_enabled;
540 extern int ftrace_graph_count;
541 extern unsigned long ftrace_graph_funcs[FTRACE_GRAPH_MAX_FUNCS];
543 static inline int ftrace_graph_addr(unsigned long addr)
547 if (!ftrace_graph_filter_enabled)
550 for (i = 0; i < ftrace_graph_count; i++) {
551 if (addr == ftrace_graph_funcs[i]) {
553 * If no irqs are to be traced, but a set_graph_function
554 * is set, and called by an interrupt handler, we still
558 trace_recursion_set(TRACE_IRQ_BIT);
560 trace_recursion_clear(TRACE_IRQ_BIT);
568 static inline int ftrace_graph_addr(unsigned long addr)
572 #endif /* CONFIG_DYNAMIC_FTRACE */
573 #else /* CONFIG_FUNCTION_GRAPH_TRACER */
574 static inline enum print_line_t
575 print_graph_function_flags(struct trace_iterator *iter, u32 flags)
577 return TRACE_TYPE_UNHANDLED;
579 #endif /* CONFIG_FUNCTION_GRAPH_TRACER */
581 extern struct list_head ftrace_pids;
583 #ifdef CONFIG_FUNCTION_TRACER
584 static inline int ftrace_trace_task(struct task_struct *task)
586 if (list_empty(&ftrace_pids))
589 return test_tsk_trace_trace(task);
591 extern int ftrace_is_dead(void);
593 static inline int ftrace_trace_task(struct task_struct *task)
597 static inline int ftrace_is_dead(void) { return 0; }
600 int ftrace_event_is_function(struct ftrace_event_call *call);
603 * struct trace_parser - servers for reading the user input separated by spaces
604 * @cont: set if the input is not complete - no final space char was found
605 * @buffer: holds the parsed user input
606 * @idx: user input length
609 struct trace_parser {
616 static inline bool trace_parser_loaded(struct trace_parser *parser)
618 return (parser->idx != 0);
621 static inline bool trace_parser_cont(struct trace_parser *parser)
626 static inline void trace_parser_clear(struct trace_parser *parser)
628 parser->cont = false;
632 extern int trace_parser_get_init(struct trace_parser *parser, int size);
633 extern void trace_parser_put(struct trace_parser *parser);
634 extern int trace_get_user(struct trace_parser *parser, const char __user *ubuf,
635 size_t cnt, loff_t *ppos);
638 * trace_iterator_flags is an enumeration that defines bit
639 * positions into trace_flags that controls the output.
641 * NOTE: These bits must match the trace_options array in
644 enum trace_iterator_flags {
645 TRACE_ITER_PRINT_PARENT = 0x01,
646 TRACE_ITER_SYM_OFFSET = 0x02,
647 TRACE_ITER_SYM_ADDR = 0x04,
648 TRACE_ITER_VERBOSE = 0x08,
649 TRACE_ITER_RAW = 0x10,
650 TRACE_ITER_HEX = 0x20,
651 TRACE_ITER_BIN = 0x40,
652 TRACE_ITER_BLOCK = 0x80,
653 TRACE_ITER_STACKTRACE = 0x100,
654 TRACE_ITER_PRINTK = 0x200,
655 TRACE_ITER_PREEMPTONLY = 0x400,
656 TRACE_ITER_BRANCH = 0x800,
657 TRACE_ITER_ANNOTATE = 0x1000,
658 TRACE_ITER_USERSTACKTRACE = 0x2000,
659 TRACE_ITER_SYM_USEROBJ = 0x4000,
660 TRACE_ITER_PRINTK_MSGONLY = 0x8000,
661 TRACE_ITER_CONTEXT_INFO = 0x10000, /* Print pid/cpu/time */
662 TRACE_ITER_LATENCY_FMT = 0x20000,
663 TRACE_ITER_SLEEP_TIME = 0x40000,
664 TRACE_ITER_GRAPH_TIME = 0x80000,
665 TRACE_ITER_RECORD_CMD = 0x100000,
666 TRACE_ITER_OVERWRITE = 0x200000,
667 TRACE_ITER_STOP_ON_FREE = 0x400000,
668 TRACE_ITER_IRQ_INFO = 0x800000,
672 * TRACE_ITER_SYM_MASK masks the options in trace_flags that
673 * control the output of kernel symbols.
675 #define TRACE_ITER_SYM_MASK \
676 (TRACE_ITER_PRINT_PARENT|TRACE_ITER_SYM_OFFSET|TRACE_ITER_SYM_ADDR)
678 extern struct tracer nop_trace;
680 #ifdef CONFIG_BRANCH_TRACER
681 extern int enable_branch_tracing(struct trace_array *tr);
682 extern void disable_branch_tracing(void);
683 static inline int trace_branch_enable(struct trace_array *tr)
685 if (trace_flags & TRACE_ITER_BRANCH)
686 return enable_branch_tracing(tr);
689 static inline void trace_branch_disable(void)
691 /* due to races, always disable */
692 disable_branch_tracing();
695 static inline int trace_branch_enable(struct trace_array *tr)
699 static inline void trace_branch_disable(void)
702 #endif /* CONFIG_BRANCH_TRACER */
704 /* set ring buffers to default size if not already done so */
705 int tracing_update_buffers(void);
707 /* trace event type bit fields, not numeric */
709 TRACE_EVENT_TYPE_PRINTF = 1,
710 TRACE_EVENT_TYPE_RAW = 2,
713 struct ftrace_event_field {
714 struct list_head link;
723 struct event_filter {
724 int n_preds; /* Number assigned */
725 int a_preds; /* allocated */
726 struct filter_pred *preds;
727 struct filter_pred *root;
731 struct event_subsystem {
732 struct list_head list;
734 struct dentry *entry;
735 struct event_filter *filter;
740 #define FILTER_PRED_INVALID ((unsigned short)-1)
741 #define FILTER_PRED_IS_RIGHT (1 << 15)
742 #define FILTER_PRED_FOLD (1 << 15)
745 * The max preds is the size of unsigned short with
746 * two flags at the MSBs. One bit is used for both the IS_RIGHT
747 * and FOLD flags. The other is reserved.
749 * 2^14 preds is way more than enough.
751 #define MAX_FILTER_PRED 16384
756 typedef int (*filter_pred_fn_t) (struct filter_pred *pred, void *event);
758 typedef int (*regex_match_func)(char *str, struct regex *r, int len);
768 char pattern[MAX_FILTER_STR_VAL];
771 regex_match_func match;
779 struct ftrace_event_field *field;
783 unsigned short index;
784 unsigned short parent;
786 unsigned short right;
789 extern struct list_head ftrace_common_fields;
791 extern enum regex_type
792 filter_parse_regex(char *buff, int len, char **search, int *not);
793 extern void print_event_filter(struct ftrace_event_call *call,
794 struct trace_seq *s);
795 extern int apply_event_filter(struct ftrace_event_call *call,
796 char *filter_string);
797 extern int apply_subsystem_event_filter(struct event_subsystem *system,
798 char *filter_string);
799 extern void print_subsystem_event_filter(struct event_subsystem *system,
800 struct trace_seq *s);
801 extern int filter_assign_type(const char *type);
804 trace_get_fields(struct ftrace_event_call *event_call);
807 filter_check_discard(struct ftrace_event_call *call, void *rec,
808 struct ring_buffer *buffer,
809 struct ring_buffer_event *event)
811 if (unlikely(call->flags & TRACE_EVENT_FL_FILTERED) &&
812 !filter_match_preds(call->filter, rec)) {
813 ring_buffer_discard_commit(buffer, event);
820 extern void trace_event_enable_cmd_record(bool enable);
822 extern struct mutex event_mutex;
823 extern struct list_head ftrace_events;
825 extern const char *__start___trace_bprintk_fmt[];
826 extern const char *__stop___trace_bprintk_fmt[];
829 #define FTRACE_ENTRY(call, struct_name, id, tstruct, print, filter) \
830 extern struct ftrace_event_call \
831 __attribute__((__aligned__(4))) event_##call;
832 #undef FTRACE_ENTRY_DUP
833 #define FTRACE_ENTRY_DUP(call, struct_name, id, tstruct, print, filter) \
834 FTRACE_ENTRY(call, struct_name, id, PARAMS(tstruct), PARAMS(print), \
836 #include "trace_entries.h"
838 #ifdef CONFIG_PERF_EVENTS
839 #ifdef CONFIG_FUNCTION_TRACER
840 int perf_ftrace_event_register(struct ftrace_event_call *call,
841 enum trace_reg type, void *data);
843 #define perf_ftrace_event_register NULL
844 #endif /* CONFIG_FUNCTION_TRACER */
845 #endif /* CONFIG_PERF_EVENTS */
847 #endif /* _LINUX_KERNEL_TRACE_H */