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 */