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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 | ||
13 | struct trace_seq { | |
14 | unsigned char buffer[PAGE_SIZE]; | |
15 | unsigned int len; | |
16 | unsigned int readpos; | |
17 | int full; | |
18 | }; | |
19 | ||
20 | static inline void | |
21 | trace_seq_init(struct trace_seq *s) | |
22 | { | |
23 | s->len = 0; | |
24 | s->readpos = 0; | |
25 | s->full = 0; | |
26 | } | |
27 | ||
28 | /* | |
29 | * Currently only defined when tracing is enabled. | |
30 | */ | |
31 | #ifdef CONFIG_TRACING | |
32 | extern __printf(2, 3) | |
33 | int trace_seq_printf(struct trace_seq *s, const char *fmt, ...); | |
34 | extern __printf(2, 0) | |
35 | int trace_seq_vprintf(struct trace_seq *s, const char *fmt, va_list args); | |
36 | extern int | |
37 | trace_seq_bprintf(struct trace_seq *s, const char *fmt, const u32 *binary); | |
38 | extern int trace_print_seq(struct seq_file *m, struct trace_seq *s); | |
39 | extern ssize_t trace_seq_to_user(struct trace_seq *s, char __user *ubuf, | |
40 | size_t cnt); | |
41 | extern int trace_seq_puts(struct trace_seq *s, const char *str); | |
42 | extern int trace_seq_putc(struct trace_seq *s, unsigned char c); | |
43 | extern int trace_seq_putmem(struct trace_seq *s, const void *mem, size_t len); | |
44 | extern int trace_seq_putmem_hex(struct trace_seq *s, const void *mem, | |
45 | size_t len); | |
46 | extern void *trace_seq_reserve(struct trace_seq *s, size_t len); | |
47 | extern int trace_seq_path(struct trace_seq *s, const struct path *path); | |
48 | ||
49 | #else /* CONFIG_TRACING */ | |
50 | static inline int trace_seq_printf(struct trace_seq *s, const char *fmt, ...) | |
51 | { | |
52 | return 0; | |
53 | } | |
54 | static inline int | |
55 | trace_seq_bprintf(struct trace_seq *s, const char *fmt, const u32 *binary) | |
56 | { | |
57 | return 0; | |
58 | } | |
59 | ||
60 | static inline int trace_print_seq(struct seq_file *m, struct trace_seq *s) | |
61 | { | |
62 | return 0; | |
63 | } | |
64 | static inline ssize_t trace_seq_to_user(struct trace_seq *s, char __user *ubuf, | |
65 | size_t cnt) | |
66 | { | |
67 | return 0; | |
68 | } | |
69 | static inline int trace_seq_puts(struct trace_seq *s, const char *str) | |
70 | { | |
71 | return 0; | |
72 | } | |
73 | static inline int trace_seq_putc(struct trace_seq *s, unsigned char c) | |
74 | { | |
75 | return 0; | |
76 | } | |
77 | static inline int | |
78 | trace_seq_putmem(struct trace_seq *s, const void *mem, size_t len) | |
79 | { | |
80 | return 0; | |
81 | } | |
82 | static inline int trace_seq_putmem_hex(struct trace_seq *s, const void *mem, | |
83 | size_t len) | |
84 | { | |
85 | return 0; | |
86 | } | |
87 | static inline void *trace_seq_reserve(struct trace_seq *s, size_t len) | |
88 | { | |
89 | return NULL; | |
90 | } | |
91 | static inline int trace_seq_path(struct trace_seq *s, const struct path *path) | |
92 | { | |
93 | return 0; | |
94 | } | |
95 | #endif /* CONFIG_TRACING */ | |
96 | ||
97 | #endif /* _LINUX_TRACE_SEQ_H */ |