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review.evervolv.com / android_kernel_htc_msm8960 / bbebbfed7449e6152fe014d91a3f71fe30941fb8 / . / include / linux / trace_seq.h
blob: 5cf397ceb726fee2c48da416f8ade27c1ae6a7f5 [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
32extern int trace_seq_printf(struct trace_seq *s, const char *fmt, ...)
33 __attribute__ ((format (printf, 2, 3)));
Steven Rostedt725c6242009-06-08 19:09:45 -0400[diff] [blame]34extern int trace_seq_vprintf(struct trace_seq *s, const char *fmt, va_list args)
35 __attribute__ ((format (printf, 2, 0)));
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 Rostedt95045042009-04-11 12:59:57 -0400[diff] [blame]39extern ssize_t trace_seq_to_user(struct trace_seq *s, char __user *ubuf,
40 size_t cnt);
41extern int trace_seq_puts(struct trace_seq *s, const char *str);
42extern int trace_seq_putc(struct trace_seq *s, unsigned char c);
43extern int trace_seq_putmem(struct trace_seq *s, const void *mem, size_t len);
44extern int trace_seq_putmem_hex(struct trace_seq *s, const void *mem,
45 size_t len);
46extern void *trace_seq_reserve(struct trace_seq *s, size_t len);
47extern int trace_seq_path(struct trace_seq *s, struct path *path);
48
49#else /* CONFIG_TRACING */
50static inline int trace_seq_printf(struct trace_seq *s, const char *fmt, ...)
Steven Rostedt95045042009-04-11 12:59:57 -0400[diff] [blame]51{
52 return 0;
53}
54static inline int
55trace_seq_bprintf(struct trace_seq *s, const char *fmt, const u32 *binary)
56{
57 return 0;
58}
59
Steven Rostedta63ce5b2009-12-07 09:11:39 -0500[diff] [blame]60static inline int trace_print_seq(struct seq_file *m, struct trace_seq *s)
Steven Rostedt95045042009-04-11 12:59:57 -0400[diff] [blame]61{
Steven Rostedta63ce5b2009-12-07 09:11:39 -0500[diff] [blame]62 return 0;
Steven Rostedt95045042009-04-11 12:59:57 -0400[diff] [blame]63}
64static inline ssize_t trace_seq_to_user(struct trace_seq *s, char __user *ubuf,
65 size_t cnt)
66{
67 return 0;
68}
69static inline int trace_seq_puts(struct trace_seq *s, const char *str)
70{
71 return 0;
72}
Steven Rostedt23de29d2009-04-20 12:59:29 -0400[diff] [blame]73static inline int trace_seq_putc(struct trace_seq *s, unsigned char c)
Steven Rostedt95045042009-04-11 12:59:57 -0400[diff] [blame]74{
75 return 0;
76}
77static inline int
78trace_seq_putmem(struct trace_seq *s, const void *mem, size_t len)
79{
80 return 0;
81}
82static inline int trace_seq_putmem_hex(struct trace_seq *s, const void *mem,
83 size_t len)
84{
85 return 0;
86}
87static inline void *trace_seq_reserve(struct trace_seq *s, size_t len)
88{
89 return NULL;
90}
91static inline int trace_seq_path(struct trace_seq *s, struct path *path)
92{
93 return 0;
94}
95#endif /* CONFIG_TRACING */
96
97#endif /* _LINUX_TRACE_SEQ_H */