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;
106 struct uprobe_trace_entry_head {
107 struct trace_entry ent;
112 * trace_flag_type is an enumeration that holds different
113 * states when a trace occurs. These are:
114 * IRQS_OFF - interrupts were disabled
115 * IRQS_NOSUPPORT - arch does not support irqs_disabled_flags
116 * NEED_RESCHED - reschedule is requested
117 * HARDIRQ - inside an interrupt handler
118 * SOFTIRQ - inside a softirq handler
120 enum trace_flag_type {
121 TRACE_FLAG_IRQS_OFF = 0x01,
122 TRACE_FLAG_IRQS_NOSUPPORT = 0x02,
123 TRACE_FLAG_NEED_RESCHED = 0x04,
124 TRACE_FLAG_HARDIRQ = 0x08,
125 TRACE_FLAG_SOFTIRQ = 0x10,
128 #define TRACE_BUF_SIZE 1024
131 * The CPU trace array - it consists of thousands of trace entries
132 * plus some other descriptor data: (for example which task started
135 struct trace_array_cpu {
137 void *buffer_page; /* ring buffer spare */
139 unsigned long entries;
140 unsigned long saved_latency;
141 unsigned long critical_start;
142 unsigned long critical_end;
143 unsigned long critical_sequence;
145 unsigned long policy;
146 unsigned long rt_priority;
147 unsigned long skipped_entries;
148 cycle_t preempt_timestamp;
151 char comm[TASK_COMM_LEN];
155 * The trace array - an array of per-CPU trace arrays. This is the
156 * highest level data structure that individual tracers deal with.
157 * They have on/off state as well:
160 struct ring_buffer *buffer;
164 struct task_struct *waiter;
165 struct trace_array_cpu *data[NR_CPUS];
168 #define FTRACE_CMP_TYPE(var, type) \
169 __builtin_types_compatible_p(typeof(var), type *)
172 #define IF_ASSIGN(var, entry, etype, id) \
173 if (FTRACE_CMP_TYPE(var, etype)) { \
174 var = (typeof(var))(entry); \
175 WARN_ON(id && (entry)->type != id); \
179 /* Will cause compile errors if type is not found. */
180 extern void __ftrace_bad_type(void);
183 * The trace_assign_type is a verifier that the entry type is
184 * the same as the type being assigned. To add new types simply
185 * add a line with the following format:
187 * IF_ASSIGN(var, ent, type, id);
189 * Where "type" is the trace type that includes the trace_entry
190 * as the "ent" item. And "id" is the trace identifier that is
191 * used in the trace_type enum.
193 * If the type can have more than one id, then use zero.
195 #define trace_assign_type(var, ent) \
197 IF_ASSIGN(var, ent, struct ftrace_entry, TRACE_FN); \
198 IF_ASSIGN(var, ent, struct ctx_switch_entry, 0); \
199 IF_ASSIGN(var, ent, struct stack_entry, TRACE_STACK); \
200 IF_ASSIGN(var, ent, struct userstack_entry, TRACE_USER_STACK);\
201 IF_ASSIGN(var, ent, struct print_entry, TRACE_PRINT); \
202 IF_ASSIGN(var, ent, struct bprint_entry, TRACE_BPRINT); \
203 IF_ASSIGN(var, ent, struct trace_mmiotrace_rw, \
205 IF_ASSIGN(var, ent, struct trace_mmiotrace_map, \
207 IF_ASSIGN(var, ent, struct trace_branch, TRACE_BRANCH); \
208 IF_ASSIGN(var, ent, struct ftrace_graph_ent_entry, \
210 IF_ASSIGN(var, ent, struct ftrace_graph_ret_entry, \
212 __ftrace_bad_type(); \
216 * An option specific to a tracer. This is a boolean value.
217 * The bit is the bit index that sets its value on the
218 * flags value in struct tracer_flags.
221 const char *name; /* Will appear on the trace_options file */
222 u32 bit; /* Mask assigned in val field in tracer_flags */
226 * The set of specific options for a tracer. Your tracer
227 * have to set the initial value of the flags val.
229 struct tracer_flags {
231 struct tracer_opt *opts;
234 /* Makes more easy to define a tracer opt */
235 #define TRACER_OPT(s, b) .name = #s, .bit = b
239 * struct tracer - a specific tracer and its callbacks to interact with debugfs
240 * @name: the name chosen to select it on the available_tracers file
241 * @init: called when one switches to this tracer (echo name > current_tracer)
242 * @reset: called when one switches to another tracer
243 * @start: called when tracing is unpaused (echo 1 > tracing_enabled)
244 * @stop: called when tracing is paused (echo 0 > tracing_enabled)
245 * @open: called when the trace file is opened
246 * @pipe_open: called when the trace_pipe file is opened
247 * @wait_pipe: override how the user waits for traces on trace_pipe
248 * @close: called when the trace file is released
249 * @pipe_close: called when the trace_pipe file is released
250 * @read: override the default read callback on trace_pipe
251 * @splice_read: override the default splice_read callback on trace_pipe
252 * @selftest: selftest to run on boot (see trace_selftest.c)
253 * @print_headers: override the first lines that describe your columns
254 * @print_line: callback that prints a trace
255 * @set_flag: signals one of your private flags changed (trace_options file)
256 * @flags: your private flags
260 int (*init)(struct trace_array *tr);
261 void (*reset)(struct trace_array *tr);
262 void (*start)(struct trace_array *tr);
263 void (*stop)(struct trace_array *tr);
264 void (*open)(struct trace_iterator *iter);
265 void (*pipe_open)(struct trace_iterator *iter);
266 void (*wait_pipe)(struct trace_iterator *iter);
267 void (*close)(struct trace_iterator *iter);
268 void (*pipe_close)(struct trace_iterator *iter);
269 ssize_t (*read)(struct trace_iterator *iter,
270 struct file *filp, char __user *ubuf,
271 size_t cnt, loff_t *ppos);
272 ssize_t (*splice_read)(struct trace_iterator *iter,
275 struct pipe_inode_info *pipe,
278 #ifdef CONFIG_FTRACE_STARTUP_TEST
279 int (*selftest)(struct tracer *trace,
280 struct trace_array *tr);
282 void (*print_header)(struct seq_file *m);
283 enum print_line_t (*print_line)(struct trace_iterator *iter);
284 /* If you handled the flag setting, return 0 */
285 int (*set_flag)(u32 old_flags, u32 bit, int set);
287 struct tracer_flags *flags;
293 /* Only current can touch trace_recursion */
294 #define trace_recursion_inc() do { (current)->trace_recursion++; } while (0)
295 #define trace_recursion_dec() do { (current)->trace_recursion--; } while (0)
297 /* Ring buffer has the 10 LSB bits to count */
298 #define trace_recursion_buffer() ((current)->trace_recursion & 0x3ff)
300 /* for function tracing recursion */
302 TRACE_INTERNAL_BIT = 11,
303 TRACE_INTERNAL_NMI_BIT,
304 TRACE_INTERNAL_IRQ_BIT,
305 TRACE_INTERNAL_SIRQ_BIT,
308 TRACE_GLOBAL_NMI_BIT,
309 TRACE_GLOBAL_IRQ_BIT,
310 TRACE_GLOBAL_SIRQ_BIT,
315 * Abuse of the trace_recursion.
316 * As we need a way to maintain state if we are tracing the function
317 * graph in irq because we want to trace a particular function that
318 * was called in irq context but we have irq tracing off. Since this
319 * can only be modified by current, we can reuse trace_recursion.
324 #define trace_recursion_set(bit) do { (current)->trace_recursion |= (1<<(bit)); } while (0)
325 #define trace_recursion_clear(bit) do { (current)->trace_recursion &= ~(1<<(bit)); } while (0)
326 #define trace_recursion_test(bit) ((current)->trace_recursion & (1<<(bit)))
328 #define TRACE_PIPE_ALL_CPU -1
330 static inline struct ring_buffer_iter *
331 trace_buffer_iter(struct trace_iterator *iter, int cpu)
333 if (iter->buffer_iter && iter->buffer_iter[cpu])
334 return iter->buffer_iter[cpu];
338 int tracer_init(struct tracer *t, struct trace_array *tr);
339 int tracing_is_enabled(void);
340 void tracing_reset(struct trace_array *tr, int cpu);
341 void tracing_reset_online_cpus(struct trace_array *tr);
342 void tracing_reset_current(int cpu);
343 void tracing_reset_current_online_cpus(void);
344 int tracing_open_generic(struct inode *inode, struct file *filp);
345 struct dentry *trace_create_file(const char *name,
347 struct dentry *parent,
349 const struct file_operations *fops);
351 struct dentry *tracing_init_dentry(void);
353 struct ring_buffer_event;
355 struct ring_buffer_event *
356 trace_buffer_lock_reserve(struct ring_buffer *buffer,
362 struct trace_entry *tracing_get_trace_entry(struct trace_array *tr,
363 struct trace_array_cpu *data);
365 struct trace_entry *trace_find_next_entry(struct trace_iterator *iter,
366 int *ent_cpu, u64 *ent_ts);
368 void __buffer_unlock_commit(struct ring_buffer *buffer,
369 struct ring_buffer_event *event);
371 int trace_empty(struct trace_iterator *iter);
373 void *trace_find_next_entry_inc(struct trace_iterator *iter);
375 void trace_init_global_iter(struct trace_iterator *iter);
377 void tracing_iter_reset(struct trace_iterator *iter, int cpu);
379 void poll_wait_pipe(struct trace_iterator *iter);
381 void ftrace(struct trace_array *tr,
382 struct trace_array_cpu *data,
384 unsigned long parent_ip,
385 unsigned long flags, int pc);
386 void tracing_sched_switch_trace(struct trace_array *tr,
387 struct task_struct *prev,
388 struct task_struct *next,
389 unsigned long flags, int pc);
391 void tracing_sched_wakeup_trace(struct trace_array *tr,
392 struct task_struct *wakee,
393 struct task_struct *cur,
394 unsigned long flags, int pc);
395 void trace_function(struct trace_array *tr,
397 unsigned long parent_ip,
398 unsigned long flags, int pc);
399 void trace_graph_function(struct trace_array *tr,
401 unsigned long parent_ip,
402 unsigned long flags, int pc);
403 void trace_latency_header(struct seq_file *m);
404 void trace_default_header(struct seq_file *m);
405 void print_trace_header(struct seq_file *m, struct trace_iterator *iter);
406 int trace_empty(struct trace_iterator *iter);
408 void trace_graph_return(struct ftrace_graph_ret *trace);
409 int trace_graph_entry(struct ftrace_graph_ent *trace);
410 void set_graph_array(struct trace_array *tr);
412 void tracing_start_cmdline_record(void);
413 void tracing_stop_cmdline_record(void);
414 void tracing_sched_switch_assign_trace(struct trace_array *tr);
415 void tracing_stop_sched_switch_record(void);
416 void tracing_start_sched_switch_record(void);
417 int register_tracer(struct tracer *type);
418 int is_tracing_stopped(void);
420 extern cpumask_var_t __read_mostly tracing_buffer_mask;
422 #define for_each_tracing_cpu(cpu) \
423 for_each_cpu(cpu, tracing_buffer_mask)
425 extern unsigned long nsecs_to_usecs(unsigned long nsecs);
427 extern unsigned long tracing_thresh;
429 #ifdef CONFIG_TRACER_MAX_TRACE
430 extern unsigned long tracing_max_latency;
432 void update_max_tr(struct trace_array *tr, struct task_struct *tsk, int cpu);
433 void update_max_tr_single(struct trace_array *tr,
434 struct task_struct *tsk, int cpu);
435 #endif /* CONFIG_TRACER_MAX_TRACE */
437 #ifdef CONFIG_STACKTRACE
438 void ftrace_trace_stack(struct ring_buffer *buffer, unsigned long flags,
441 void ftrace_trace_stack_regs(struct ring_buffer *buffer, unsigned long flags,
442 int skip, int pc, struct pt_regs *regs);
444 void ftrace_trace_userstack(struct ring_buffer *buffer, unsigned long flags,
447 void __trace_stack(struct trace_array *tr, unsigned long flags, int skip,
450 static inline void ftrace_trace_stack(struct ring_buffer *buffer,
451 unsigned long flags, int skip, int pc)
455 static inline void ftrace_trace_stack_regs(struct ring_buffer *buffer,
456 unsigned long flags, int skip,
457 int pc, struct pt_regs *regs)
461 static inline void ftrace_trace_userstack(struct ring_buffer *buffer,
462 unsigned long flags, int pc)
466 static inline void __trace_stack(struct trace_array *tr, unsigned long flags,
470 #endif /* CONFIG_STACKTRACE */
472 extern cycle_t ftrace_now(int cpu);
474 extern void trace_find_cmdline(int pid, char comm[]);
476 #ifdef CONFIG_DYNAMIC_FTRACE
477 extern unsigned long ftrace_update_tot_cnt;
479 #define DYN_FTRACE_TEST_NAME trace_selftest_dynamic_test_func
480 extern int DYN_FTRACE_TEST_NAME(void);
481 #define DYN_FTRACE_TEST_NAME2 trace_selftest_dynamic_test_func2
482 extern int DYN_FTRACE_TEST_NAME2(void);
484 extern int ring_buffer_expanded;
485 extern bool tracing_selftest_disabled;
486 DECLARE_PER_CPU(int, ftrace_cpu_disabled);
488 #ifdef CONFIG_FTRACE_STARTUP_TEST
489 extern int trace_selftest_startup_function(struct tracer *trace,
490 struct trace_array *tr);
491 extern int trace_selftest_startup_function_graph(struct tracer *trace,
492 struct trace_array *tr);
493 extern int trace_selftest_startup_irqsoff(struct tracer *trace,
494 struct trace_array *tr);
495 extern int trace_selftest_startup_preemptoff(struct tracer *trace,
496 struct trace_array *tr);
497 extern int trace_selftest_startup_preemptirqsoff(struct tracer *trace,
498 struct trace_array *tr);
499 extern int trace_selftest_startup_wakeup(struct tracer *trace,
500 struct trace_array *tr);
501 extern int trace_selftest_startup_nop(struct tracer *trace,
502 struct trace_array *tr);
503 extern int trace_selftest_startup_sched_switch(struct tracer *trace,
504 struct trace_array *tr);
505 extern int trace_selftest_startup_branch(struct tracer *trace,
506 struct trace_array *tr);
507 #endif /* CONFIG_FTRACE_STARTUP_TEST */
509 extern void *head_page(struct trace_array_cpu *data);
510 extern unsigned long long ns2usecs(cycle_t nsec);
512 trace_vbprintk(unsigned long ip, const char *fmt, va_list args);
514 trace_vprintk(unsigned long ip, const char *fmt, va_list args);
516 trace_array_vprintk(struct trace_array *tr,
517 unsigned long ip, const char *fmt, va_list args);
518 int trace_array_printk(struct trace_array *tr,
519 unsigned long ip, const char *fmt, ...);
520 void trace_printk_seq(struct trace_seq *s);
521 enum print_line_t print_trace_line(struct trace_iterator *iter);
523 extern unsigned long trace_flags;
525 extern int trace_clock_id;
527 /* Standard output formatting function used for function return traces */
528 #ifdef CONFIG_FUNCTION_GRAPH_TRACER
531 #define TRACE_GRAPH_PRINT_OVERRUN 0x1
532 #define TRACE_GRAPH_PRINT_CPU 0x2
533 #define TRACE_GRAPH_PRINT_OVERHEAD 0x4
534 #define TRACE_GRAPH_PRINT_PROC 0x8
535 #define TRACE_GRAPH_PRINT_DURATION 0x10
536 #define TRACE_GRAPH_PRINT_ABS_TIME 0x20
538 extern enum print_line_t
539 print_graph_function_flags(struct trace_iterator *iter, u32 flags);
540 extern void print_graph_headers_flags(struct seq_file *s, u32 flags);
541 extern enum print_line_t
542 trace_print_graph_duration(unsigned long long duration, struct trace_seq *s);
543 extern void graph_trace_open(struct trace_iterator *iter);
544 extern void graph_trace_close(struct trace_iterator *iter);
545 extern int __trace_graph_entry(struct trace_array *tr,
546 struct ftrace_graph_ent *trace,
547 unsigned long flags, int pc);
548 extern void __trace_graph_return(struct trace_array *tr,
549 struct ftrace_graph_ret *trace,
550 unsigned long flags, int pc);
553 #ifdef CONFIG_DYNAMIC_FTRACE
554 /* TODO: make this variable */
555 #define FTRACE_GRAPH_MAX_FUNCS 32
556 extern int ftrace_graph_filter_enabled;
557 extern int ftrace_graph_count;
558 extern unsigned long ftrace_graph_funcs[FTRACE_GRAPH_MAX_FUNCS];
560 static inline int ftrace_graph_addr(unsigned long addr)
564 if (!ftrace_graph_filter_enabled)
567 for (i = 0; i < ftrace_graph_count; i++) {
568 if (addr == ftrace_graph_funcs[i]) {
570 * If no irqs are to be traced, but a set_graph_function
571 * is set, and called by an interrupt handler, we still
575 trace_recursion_set(TRACE_IRQ_BIT);
577 trace_recursion_clear(TRACE_IRQ_BIT);
585 static inline int ftrace_graph_addr(unsigned long addr)
589 #endif /* CONFIG_DYNAMIC_FTRACE */
590 #else /* CONFIG_FUNCTION_GRAPH_TRACER */
591 static inline enum print_line_t
592 print_graph_function_flags(struct trace_iterator *iter, u32 flags)
594 return TRACE_TYPE_UNHANDLED;
596 #endif /* CONFIG_FUNCTION_GRAPH_TRACER */
598 extern struct list_head ftrace_pids;
600 #ifdef CONFIG_FUNCTION_TRACER
601 static inline int ftrace_trace_task(struct task_struct *task)
603 if (list_empty(&ftrace_pids))
606 return test_tsk_trace_trace(task);
608 extern int ftrace_is_dead(void);
610 static inline int ftrace_trace_task(struct task_struct *task)
614 static inline int ftrace_is_dead(void) { return 0; }
617 int ftrace_event_is_function(struct ftrace_event_call *call);
620 * struct trace_parser - servers for reading the user input separated by spaces
621 * @cont: set if the input is not complete - no final space char was found
622 * @buffer: holds the parsed user input
623 * @idx: user input length
626 struct trace_parser {
633 static inline bool trace_parser_loaded(struct trace_parser *parser)
635 return (parser->idx != 0);
638 static inline bool trace_parser_cont(struct trace_parser *parser)
643 static inline void trace_parser_clear(struct trace_parser *parser)
645 parser->cont = false;
649 extern int trace_parser_get_init(struct trace_parser *parser, int size);
650 extern void trace_parser_put(struct trace_parser *parser);
651 extern int trace_get_user(struct trace_parser *parser, const char __user *ubuf,
652 size_t cnt, loff_t *ppos);
655 * trace_iterator_flags is an enumeration that defines bit
656 * positions into trace_flags that controls the output.
658 * NOTE: These bits must match the trace_options array in
661 enum trace_iterator_flags {
662 TRACE_ITER_PRINT_PARENT = 0x01,
663 TRACE_ITER_SYM_OFFSET = 0x02,
664 TRACE_ITER_SYM_ADDR = 0x04,
665 TRACE_ITER_VERBOSE = 0x08,
666 TRACE_ITER_RAW = 0x10,
667 TRACE_ITER_HEX = 0x20,
668 TRACE_ITER_BIN = 0x40,
669 TRACE_ITER_BLOCK = 0x80,
670 TRACE_ITER_STACKTRACE = 0x100,
671 TRACE_ITER_PRINTK = 0x200,
672 TRACE_ITER_PREEMPTONLY = 0x400,
673 TRACE_ITER_BRANCH = 0x800,
674 TRACE_ITER_ANNOTATE = 0x1000,
675 TRACE_ITER_USERSTACKTRACE = 0x2000,
676 TRACE_ITER_SYM_USEROBJ = 0x4000,
677 TRACE_ITER_PRINTK_MSGONLY = 0x8000,
678 TRACE_ITER_CONTEXT_INFO = 0x10000, /* Print pid/cpu/time */
679 TRACE_ITER_LATENCY_FMT = 0x20000,
680 TRACE_ITER_SLEEP_TIME = 0x40000,
681 TRACE_ITER_GRAPH_TIME = 0x80000,
682 TRACE_ITER_RECORD_CMD = 0x100000,
683 TRACE_ITER_OVERWRITE = 0x200000,
684 TRACE_ITER_STOP_ON_FREE = 0x400000,
685 TRACE_ITER_IRQ_INFO = 0x800000,
686 TRACE_ITER_MARKERS = 0x1000000,
690 * TRACE_ITER_SYM_MASK masks the options in trace_flags that
691 * control the output of kernel symbols.
693 #define TRACE_ITER_SYM_MASK \
694 (TRACE_ITER_PRINT_PARENT|TRACE_ITER_SYM_OFFSET|TRACE_ITER_SYM_ADDR)
696 extern struct tracer nop_trace;
698 #ifdef CONFIG_BRANCH_TRACER
699 extern int enable_branch_tracing(struct trace_array *tr);
700 extern void disable_branch_tracing(void);
701 static inline int trace_branch_enable(struct trace_array *tr)
703 if (trace_flags & TRACE_ITER_BRANCH)
704 return enable_branch_tracing(tr);
707 static inline void trace_branch_disable(void)
709 /* due to races, always disable */
710 disable_branch_tracing();
713 static inline int trace_branch_enable(struct trace_array *tr)
717 static inline void trace_branch_disable(void)
720 #endif /* CONFIG_BRANCH_TRACER */
722 /* set ring buffers to default size if not already done so */
723 int tracing_update_buffers(void);
725 /* trace event type bit fields, not numeric */
727 TRACE_EVENT_TYPE_PRINTF = 1,
728 TRACE_EVENT_TYPE_RAW = 2,
731 struct ftrace_event_field {
732 struct list_head link;
741 struct event_filter {
742 int n_preds; /* Number assigned */
743 int a_preds; /* allocated */
744 struct filter_pred *preds;
745 struct filter_pred *root;
749 struct event_subsystem {
750 struct list_head list;
752 struct dentry *entry;
753 struct event_filter *filter;
758 #define FILTER_PRED_INVALID ((unsigned short)-1)
759 #define FILTER_PRED_IS_RIGHT (1 << 15)
760 #define FILTER_PRED_FOLD (1 << 15)
763 * The max preds is the size of unsigned short with
764 * two flags at the MSBs. One bit is used for both the IS_RIGHT
765 * and FOLD flags. The other is reserved.
767 * 2^14 preds is way more than enough.
769 #define MAX_FILTER_PRED 16384
774 typedef int (*filter_pred_fn_t) (struct filter_pred *pred, void *event);
776 typedef int (*regex_match_func)(char *str, struct regex *r, int len);
786 char pattern[MAX_FILTER_STR_VAL];
789 regex_match_func match;
797 struct ftrace_event_field *field;
801 unsigned short index;
802 unsigned short parent;
804 unsigned short right;
807 extern struct list_head ftrace_common_fields;
809 extern enum regex_type
810 filter_parse_regex(char *buff, int len, char **search, int *not);
811 extern void print_event_filter(struct ftrace_event_call *call,
812 struct trace_seq *s);
813 extern int apply_event_filter(struct ftrace_event_call *call,
814 char *filter_string);
815 extern int apply_subsystem_event_filter(struct event_subsystem *system,
816 char *filter_string);
817 extern void print_subsystem_event_filter(struct event_subsystem *system,
818 struct trace_seq *s);
819 extern int filter_assign_type(const char *type);
822 trace_get_fields(struct ftrace_event_call *event_call);
825 filter_check_discard(struct ftrace_event_call *call, void *rec,
826 struct ring_buffer *buffer,
827 struct ring_buffer_event *event)
829 if (unlikely(call->flags & TRACE_EVENT_FL_FILTERED) &&
830 !filter_match_preds(call->filter, rec)) {
831 ring_buffer_discard_commit(buffer, event);
838 extern void trace_event_enable_cmd_record(bool enable);
840 extern struct mutex event_mutex;
841 extern struct list_head ftrace_events;
843 extern const char *__start___trace_bprintk_fmt[];
844 extern const char *__stop___trace_bprintk_fmt[];
846 void trace_printk_init_buffers(void);
847 void trace_printk_start_comm(void);
850 #define FTRACE_ENTRY(call, struct_name, id, tstruct, print, filter) \
851 extern struct ftrace_event_call \
852 __attribute__((__aligned__(4))) event_##call;
853 #undef FTRACE_ENTRY_DUP
854 #define FTRACE_ENTRY_DUP(call, struct_name, id, tstruct, print, filter) \
855 FTRACE_ENTRY(call, struct_name, id, PARAMS(tstruct), PARAMS(print), \
857 #include "trace_entries.h"
859 #if defined(CONFIG_PERF_EVENTS) && defined(CONFIG_FUNCTION_TRACER)
860 int perf_ftrace_event_register(struct ftrace_event_call *call,
861 enum trace_reg type, void *data);
863 #define perf_ftrace_event_register NULL
866 #endif /* _LINUX_KERNEL_TRACE_H */