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nv-tegra.nvidia.com / linux-4.4 / 6d723736e472f7a0cd5b62c84152fceead241328 / . / include / linux / trace_seq.h
blob: 15ca2c71af1323e94e14bbe3660f4dfa4d7bca85 [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
Steven Rostedt95045042009-04-11 12:59:57 -0400[diff] [blame]6/*
7 * Trace sequences are used to allow a function to call several other functions
8 * to create a string of data to use (up to a max of PAGE_SIZE.
9 */
10
11struct trace_seq {
12 unsigned char buffer[PAGE_SIZE];
13 unsigned int len;
14 unsigned int readpos;
15};
16
17static inline void
18trace_seq_init(struct trace_seq *s)
19{
20 s->len = 0;
21 s->readpos = 0;
22}
23
24/*
25 * Currently only defined when tracing is enabled.
26 */
27#ifdef CONFIG_TRACING
28extern int trace_seq_printf(struct trace_seq *s, const char *fmt, ...)
29 __attribute__ ((format (printf, 2, 3)));
30extern int
31trace_seq_bprintf(struct trace_seq *s, const char *fmt, const u32 *binary);
32extern void trace_print_seq(struct seq_file *m, struct trace_seq *s);
33extern ssize_t trace_seq_to_user(struct trace_seq *s, char __user *ubuf,
34 size_t cnt);
35extern int trace_seq_puts(struct trace_seq *s, const char *str);
36extern int trace_seq_putc(struct trace_seq *s, unsigned char c);
37extern int trace_seq_putmem(struct trace_seq *s, const void *mem, size_t len);
38extern int trace_seq_putmem_hex(struct trace_seq *s, const void *mem,
39 size_t len);
40extern void *trace_seq_reserve(struct trace_seq *s, size_t len);
41extern int trace_seq_path(struct trace_seq *s, struct path *path);
42
43#else /* CONFIG_TRACING */
44static inline int trace_seq_printf(struct trace_seq *s, const char *fmt, ...)
45 __attribute__ ((format (printf, 2, 3)))
46{
47 return 0;
48}
49static inline int
50trace_seq_bprintf(struct trace_seq *s, const char *fmt, const u32 *binary)
51{
52 return 0;
53}
54
55static inline void trace_print_seq(struct seq_file *m, struct trace_seq *s)
56{
57}
58static inline ssize_t trace_seq_to_user(struct trace_seq *s, char __user *ubuf,
59 size_t cnt)
60{
61 return 0;
62}
63static inline int trace_seq_puts(struct trace_seq *s, const char *str)
64{
65 return 0;
66}
67static inline int trace_seq_putc(struct trace_seq *s, unsigned char c);
68{
69 return 0;
70}
71static inline int
72trace_seq_putmem(struct trace_seq *s, const void *mem, size_t len)
73{
74 return 0;
75}
76static inline int trace_seq_putmem_hex(struct trace_seq *s, const void *mem,
77 size_t len)
78{
79 return 0;
80}
81static inline void *trace_seq_reserve(struct trace_seq *s, size_t len)
82{
83 return NULL;
84}
85static inline int trace_seq_path(struct trace_seq *s, struct path *path)
86{
87 return 0;
88}
89#endif /* CONFIG_TRACING */
90
91#endif /* _LINUX_TRACE_SEQ_H */