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gerrit-public.fairphone.software / kernel / msm-5.4 / a63ce5b306855bccdacba95c03bfc293316c8ae3 / . / include / linux / trace_seq.h
blob: fad6857bc0f3b0e0a8ee78a984f774d76dd71752 [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;
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)));
Steven Rostedt725c6242009-06-08 19:09:45 -0400[diff] [blame]32extern int trace_seq_vprintf(struct trace_seq *s, const char *fmt, va_list args)
33 __attribute__ ((format (printf, 2, 0)));
Steven Rostedt95045042009-04-11 12:59:57 -0400[diff] [blame]34extern int
35trace_seq_bprintf(struct trace_seq *s, const char *fmt, const u32 *binary);
Steven Rostedta63ce5b2009-12-07 09:11:39 -0500[diff] [blame^]36extern int trace_print_seq(struct seq_file *m, struct trace_seq *s);
Steven Rostedt95045042009-04-11 12:59:57 -0400[diff] [blame]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, ...)
Steven Rostedt95045042009-04-11 12:59:57 -0400[diff] [blame]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
Steven Rostedta63ce5b2009-12-07 09:11:39 -0500[diff] [blame^]58static inline int trace_print_seq(struct seq_file *m, struct trace_seq *s)
Steven Rostedt95045042009-04-11 12:59:57 -0400[diff] [blame]59{
Steven Rostedta63ce5b2009-12-07 09:11:39 -0500[diff] [blame^]60 return 0;
Steven Rostedt95045042009-04-11 12:59:57 -0400[diff] [blame]61}
62static inline ssize_t trace_seq_to_user(struct trace_seq *s, char __user *ubuf,
63 size_t cnt)
64{
65 return 0;
66}
67static inline int trace_seq_puts(struct trace_seq *s, const char *str)
68{
69 return 0;
70}
Steven Rostedt23de29d2009-04-20 12:59:29 -0400[diff] [blame]71static inline int trace_seq_putc(struct trace_seq *s, unsigned char c)
Steven Rostedt95045042009-04-11 12:59:57 -0400[diff] [blame]72{
73 return 0;
74}
75static inline int
76trace_seq_putmem(struct trace_seq *s, const void *mem, size_t len)
77{
78 return 0;
79}
80static inline int trace_seq_putmem_hex(struct trace_seq *s, const void *mem,
81 size_t len)
82{
83 return 0;
84}
85static inline void *trace_seq_reserve(struct trace_seq *s, size_t len)
86{
87 return NULL;
88}
89static inline int trace_seq_path(struct trace_seq *s, struct path *path)
90{
91 return 0;
92}
93#endif /* CONFIG_TRACING */
94
95#endif /* _LINUX_TRACE_SEQ_H */