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gerrit.openfyde.cn / github.com / raspberrypi / raspberrypi-kernel / 3f4d8f78a07dba1cb333ce749bd6a15c1ada362d / . / include / linux / trace_seq.h
blob: dd85753e1bb09f9bb8523c10918c816f00b9c701 [file] [log] [blame]
Steven Rostedt95045042009-04-11 12:59:57 -0400[diff] [blame]1#ifndef _LINUX_TRACE_SEQ_H
2#define _LINUX_TRACE_SEQ_H
3
Steven Rostedt6d723732009-04-10 14:53:50 -0400[diff] [blame]4#include <linux/fs.h>
5
Wu Zhangjin78be6912009-06-14 14:52:30 +0800[diff] [blame]6#include <asm/page.h>
7
Steven Rostedt95045042009-04-11 12:59:57 -0400[diff] [blame]8/*
9 * Trace sequences are used to allow a function to call several other functions
Jiri Olsa6d3f1e12009-10-23 19:36:19 -0400[diff] [blame]10 * to create a string of data to use (up to a max of PAGE_SIZE).
Steven Rostedt95045042009-04-11 12:59:57 -0400[diff] [blame]11 */
12
13struct trace_seq {
14 unsigned char buffer[PAGE_SIZE];
15 unsigned int len;
16 unsigned int readpos;
Johannes Bergd184b312009-11-25 16:10:14 +0100[diff] [blame]17 int full;
Steven Rostedt95045042009-04-11 12:59:57 -0400[diff] [blame]18};
19
20static inline void
21trace_seq_init(struct trace_seq *s)
22{
23 s->len = 0;
24 s->readpos = 0;
Johannes Bergd184b312009-11-25 16:10:14 +0100[diff] [blame]25 s->full = 0;
Steven Rostedt95045042009-04-11 12:59:57 -0400[diff] [blame]26}
27
28/*
29 * Currently only defined when tracing is enabled.
30 */
31#ifdef CONFIG_TRACING
Joe Perchesb9075fa2011-10-31 17:11:33 -0700[diff] [blame]32extern __printf(2, 3)
33int trace_seq_printf(struct trace_seq *s, const char *fmt, ...);
34extern __printf(2, 0)
35int trace_seq_vprintf(struct trace_seq *s, const char *fmt, va_list args);
Steven Rostedt95045042009-04-11 12:59:57 -0400[diff] [blame]36extern int
37trace_seq_bprintf(struct trace_seq *s, const char *fmt, const u32 *binary);
Steven Rostedta63ce5b2009-12-07 09:11:39 -0500[diff] [blame]38extern int trace_print_seq(struct seq_file *m, struct trace_seq *s);
Steven Rostedt (Red Hat)36aabff2014-06-20 17:38:01 -0400[diff] [blame]39extern int trace_seq_to_user(struct trace_seq *s, char __user *ubuf,
40 int cnt);
Steven Rostedt95045042009-04-11 12:59:57 -0400[diff] [blame]41extern int trace_seq_puts(struct trace_seq *s, const char *str);
42extern int trace_seq_putc(struct trace_seq *s, unsigned char c);
Steven Rostedt (Red Hat)36aabff2014-06-20 17:38:01 -0400[diff] [blame]43extern int trace_seq_putmem(struct trace_seq *s, const void *mem, unsigned int len);
Steven Rostedt95045042009-04-11 12:59:57 -0400[diff] [blame]44extern int trace_seq_putmem_hex(struct trace_seq *s, const void *mem,
Steven Rostedt (Red Hat)36aabff2014-06-20 17:38:01 -0400[diff] [blame]45 unsigned int len);
Al Viro38eff282012-03-14 21:51:10 -0400[diff] [blame]46extern int trace_seq_path(struct trace_seq *s, const struct path *path);
Steven Rostedt95045042009-04-11 12:59:57 -0400[diff] [blame]47
Steven Rostedt (Red Hat)4449bf92014-05-06 13:10:24 -0400[diff] [blame]48extern int trace_seq_bitmask(struct trace_seq *s, const unsigned long *maskp,
49 int nmaskbits);
50
Steven Rostedt95045042009-04-11 12:59:57 -0400[diff] [blame]51#else /* CONFIG_TRACING */
52static inline int trace_seq_printf(struct trace_seq *s, const char *fmt, ...)
Steven Rostedt95045042009-04-11 12:59:57 -0400[diff] [blame]53{
54 return 0;
55}
56static inline int
57trace_seq_bprintf(struct trace_seq *s, const char *fmt, const u32 *binary)
58{
59 return 0;
60}
61
Steven Rostedt (Red Hat)4449bf92014-05-06 13:10:24 -0400[diff] [blame]62static inline int
63trace_seq_bitmask(struct trace_seq *s, const unsigned long *maskp,
64 int nmaskbits)
65{
66 return 0;
67}
68
Steven Rostedta63ce5b2009-12-07 09:11:39 -0500[diff] [blame]69static inline int trace_print_seq(struct seq_file *m, struct trace_seq *s)
Steven Rostedt95045042009-04-11 12:59:57 -0400[diff] [blame]70{
Steven Rostedta63ce5b2009-12-07 09:11:39 -0500[diff] [blame]71 return 0;
Steven Rostedt95045042009-04-11 12:59:57 -0400[diff] [blame]72}
Steven Rostedt (Red Hat)36aabff2014-06-20 17:38:01 -0400[diff] [blame]73static inline int trace_seq_to_user(struct trace_seq *s, char __user *ubuf,
74 int cnt)
Steven Rostedt95045042009-04-11 12:59:57 -0400[diff] [blame]75{
76 return 0;
77}
78static inline int trace_seq_puts(struct trace_seq *s, const char *str)
79{
80 return 0;
81}
Steven Rostedt23de29d2009-04-20 12:59:29 -0400[diff] [blame]82static inline int trace_seq_putc(struct trace_seq *s, unsigned char c)
Steven Rostedt95045042009-04-11 12:59:57 -0400[diff] [blame]83{
84 return 0;
85}
86static inline int
Steven Rostedt (Red Hat)36aabff2014-06-20 17:38:01 -0400[diff] [blame]87trace_seq_putmem(struct trace_seq *s, const void *mem, unsigned int len)
Steven Rostedt95045042009-04-11 12:59:57 -0400[diff] [blame]88{
89 return 0;
90}
91static inline int trace_seq_putmem_hex(struct trace_seq *s, const void *mem,
Steven Rostedt (Red Hat)36aabff2014-06-20 17:38:01 -0400[diff] [blame]92 unsigned int len)
Steven Rostedt95045042009-04-11 12:59:57 -0400[diff] [blame]93{
94 return 0;
95}
Al Viro38eff282012-03-14 21:51:10 -0400[diff] [blame]96static inline int trace_seq_path(struct trace_seq *s, const struct path *path)
Steven Rostedt95045042009-04-11 12:59:57 -0400[diff] [blame]97{
98 return 0;
99}
100#endif /* CONFIG_TRACING */
101
102#endif /* _LINUX_TRACE_SEQ_H */