Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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linux
1#ifndef _LINUX_TRACE_SEQ_H
2#define _LINUX_TRACE_SEQ_H
3
4#include <linux/fs.h>
5
6#include <asm/page.h>
7
8/*
9 * Trace sequences are used to allow a function to call several other functions
10 * to create a string of data to use (up to a max of PAGE_SIZE).
11 */
12
13struct trace_seq {
14 unsigned char buffer[PAGE_SIZE];
15 unsigned int len;
16 unsigned int readpos;
17};
18
19static inline void
20trace_seq_init(struct trace_seq *s)
21{
22 s->len = 0;
23 s->readpos = 0;
24}
25
26/*
27 * Currently only defined when tracing is enabled.
28 */
29#ifdef CONFIG_TRACING
30extern int trace_seq_printf(struct trace_seq *s, const char *fmt, ...)
31 __attribute__ ((format (printf, 2, 3)));
32extern int trace_seq_vprintf(struct trace_seq *s, const char *fmt, va_list args)
33 __attribute__ ((format (printf, 2, 0)));
34extern int
35trace_seq_bprintf(struct trace_seq *s, const char *fmt, const u32 *binary);
36extern void trace_print_seq(struct seq_file *m, struct trace_seq *s);
37extern ssize_t trace_seq_to_user(struct trace_seq *s, char __user *ubuf,
38 size_t cnt);
39extern int trace_seq_puts(struct trace_seq *s, const char *str);
40extern int trace_seq_putc(struct trace_seq *s, unsigned char c);
41extern int trace_seq_putmem(struct trace_seq *s, const void *mem, size_t len);
42extern int trace_seq_putmem_hex(struct trace_seq *s, const void *mem,
43 size_t len);
44extern void *trace_seq_reserve(struct trace_seq *s, size_t len);
45extern int trace_seq_path(struct trace_seq *s, struct path *path);
46
47#else /* CONFIG_TRACING */
48static inline int trace_seq_printf(struct trace_seq *s, const char *fmt, ...)
49{
50 return 0;
51}
52static inline int
53trace_seq_bprintf(struct trace_seq *s, const char *fmt, const u32 *binary)
54{
55 return 0;
56}
57
58static inline void trace_print_seq(struct seq_file *m, struct trace_seq *s)
59{
60}
61static inline ssize_t trace_seq_to_user(struct trace_seq *s, char __user *ubuf,
62 size_t cnt)
63{
64 return 0;
65}
66static inline int trace_seq_puts(struct trace_seq *s, const char *str)
67{
68 return 0;
69}
70static inline int trace_seq_putc(struct trace_seq *s, unsigned char c)
71{
72 return 0;
73}
74static inline int
75trace_seq_putmem(struct trace_seq *s, const void *mem, size_t len)
76{
77 return 0;
78}
79static inline int trace_seq_putmem_hex(struct trace_seq *s, const void *mem,
80 size_t len)
81{
82 return 0;
83}
84static inline void *trace_seq_reserve(struct trace_seq *s, size_t len)
85{
86 return NULL;
87}
88static inline int trace_seq_path(struct trace_seq *s, struct path *path)
89{
90 return 0;
91}
92#endif /* CONFIG_TRACING */
93
94#endif /* _LINUX_TRACE_SEQ_H */