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9504504c SR |
1 | #ifndef _LINUX_TRACE_SEQ_H |
2 | #define _LINUX_TRACE_SEQ_H | |
3 | ||
6d723736 SR |
4 | #include <linux/fs.h> |
5 | ||
9504504c SR |
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 | ||
11 | struct trace_seq { | |
12 | unsigned char buffer[PAGE_SIZE]; | |
13 | unsigned int len; | |
14 | unsigned int readpos; | |
15 | }; | |
16 | ||
17 | static inline void | |
18 | trace_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 | |
28 | extern int trace_seq_printf(struct trace_seq *s, const char *fmt, ...) | |
29 | __attribute__ ((format (printf, 2, 3))); | |
725c624a SR |
30 | extern int trace_seq_vprintf(struct trace_seq *s, const char *fmt, va_list args) |
31 | __attribute__ ((format (printf, 2, 0))); | |
9504504c SR |
32 | extern int |
33 | trace_seq_bprintf(struct trace_seq *s, const char *fmt, const u32 *binary); | |
34 | extern void trace_print_seq(struct seq_file *m, struct trace_seq *s); | |
35 | extern ssize_t trace_seq_to_user(struct trace_seq *s, char __user *ubuf, | |
36 | size_t cnt); | |
37 | extern int trace_seq_puts(struct trace_seq *s, const char *str); | |
38 | extern int trace_seq_putc(struct trace_seq *s, unsigned char c); | |
39 | extern int trace_seq_putmem(struct trace_seq *s, const void *mem, size_t len); | |
40 | extern int trace_seq_putmem_hex(struct trace_seq *s, const void *mem, | |
41 | size_t len); | |
42 | extern void *trace_seq_reserve(struct trace_seq *s, size_t len); | |
43 | extern int trace_seq_path(struct trace_seq *s, struct path *path); | |
44 | ||
45 | #else /* CONFIG_TRACING */ | |
46 | static inline int trace_seq_printf(struct trace_seq *s, const char *fmt, ...) | |
9504504c SR |
47 | { |
48 | return 0; | |
49 | } | |
50 | static inline int | |
51 | trace_seq_bprintf(struct trace_seq *s, const char *fmt, const u32 *binary) | |
52 | { | |
53 | return 0; | |
54 | } | |
55 | ||
56 | static inline void trace_print_seq(struct seq_file *m, struct trace_seq *s) | |
57 | { | |
58 | } | |
59 | static inline ssize_t trace_seq_to_user(struct trace_seq *s, char __user *ubuf, | |
60 | size_t cnt) | |
61 | { | |
62 | return 0; | |
63 | } | |
64 | static inline int trace_seq_puts(struct trace_seq *s, const char *str) | |
65 | { | |
66 | return 0; | |
67 | } | |
23de29de | 68 | static inline int trace_seq_putc(struct trace_seq *s, unsigned char c) |
9504504c SR |
69 | { |
70 | return 0; | |
71 | } | |
72 | static inline int | |
73 | trace_seq_putmem(struct trace_seq *s, const void *mem, size_t len) | |
74 | { | |
75 | return 0; | |
76 | } | |
77 | static inline int trace_seq_putmem_hex(struct trace_seq *s, const void *mem, | |
78 | size_t len) | |
79 | { | |
80 | return 0; | |
81 | } | |
82 | static inline void *trace_seq_reserve(struct trace_seq *s, size_t len) | |
83 | { | |
84 | return NULL; | |
85 | } | |
86 | static inline int trace_seq_path(struct trace_seq *s, struct path *path) | |
87 | { | |
88 | return 0; | |
89 | } | |
90 | #endif /* CONFIG_TRACING */ | |
91 | ||
92 | #endif /* _LINUX_TRACE_SEQ_H */ |