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gerrit-public.fairphone.software / kernel / msm-4.9 / efd342fb0031a17758571dce42e3f373d94e2fec / . / include / linux / trace_seq.h
blob: 136116924d8dbf805d38b276a67b3a1e13bfae26 [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 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);
Al Viro38eff282012-03-14 21:51:10 -0400[diff] [blame]47extern int trace_seq_path(struct trace_seq *s, const struct path *path);
Steven Rostedt95045042009-04-11 12:59:57 -0400[diff] [blame]48
Steven Rostedt (Red Hat)4449bf92014-05-06 13:10:24 -0400[diff] [blame]49extern int trace_seq_bitmask(struct trace_seq *s, const unsigned long *maskp,
50 int nmaskbits);
51
Steven Rostedt95045042009-04-11 12:59:57 -0400[diff] [blame]52#else /* CONFIG_TRACING */
53static inline int trace_seq_printf(struct trace_seq *s, const char *fmt, ...)
Steven Rostedt95045042009-04-11 12:59:57 -0400[diff] [blame]54{
55 return 0;
56}
57static inline int
58trace_seq_bprintf(struct trace_seq *s, const char *fmt, const u32 *binary)
59{
60 return 0;
61}
62
Steven Rostedt (Red Hat)4449bf92014-05-06 13:10:24 -0400[diff] [blame]63static inline int
64trace_seq_bitmask(struct trace_seq *s, const unsigned long *maskp,
65 int nmaskbits)
66{
67 return 0;
68}
69
Steven Rostedta63ce5b2009-12-07 09:11:39 -0500[diff] [blame]70static inline int trace_print_seq(struct seq_file *m, struct trace_seq *s)
Steven Rostedt95045042009-04-11 12:59:57 -0400[diff] [blame]71{
Steven Rostedta63ce5b2009-12-07 09:11:39 -0500[diff] [blame]72 return 0;
Steven Rostedt95045042009-04-11 12:59:57 -0400[diff] [blame]73}
74static inline ssize_t trace_seq_to_user(struct trace_seq *s, char __user *ubuf,
75 size_t cnt)
76{
77 return 0;
78}
79static inline int trace_seq_puts(struct trace_seq *s, const char *str)
80{
81 return 0;
82}
Steven Rostedt23de29d2009-04-20 12:59:29 -0400[diff] [blame]83static inline int trace_seq_putc(struct trace_seq *s, unsigned char c)
Steven Rostedt95045042009-04-11 12:59:57 -0400[diff] [blame]84{
85 return 0;
86}
87static inline int
88trace_seq_putmem(struct trace_seq *s, const void *mem, size_t len)
89{
90 return 0;
91}
92static inline int trace_seq_putmem_hex(struct trace_seq *s, const void *mem,
93 size_t len)
94{
95 return 0;
96}
97static inline void *trace_seq_reserve(struct trace_seq *s, size_t len)
98{
99 return NULL;
100}
Al Viro38eff282012-03-14 21:51:10 -0400[diff] [blame]101static inline int trace_seq_path(struct trace_seq *s, const struct path *path)
Steven Rostedt95045042009-04-11 12:59:57 -0400[diff] [blame]102{
103 return 0;
104}
105#endif /* CONFIG_TRACING */
106
107#endif /* _LINUX_TRACE_SEQ_H */