| Steven Rostedt | 9504504 | 2009-04-11 12:59:57 -0400 | [diff] [blame] | 1 | #ifndef _LINUX_TRACE_SEQ_H |
| 2 | #define _LINUX_TRACE_SEQ_H |
| 3 | |
| Steven Rostedt | 6d72373 | 2009-04-10 14:53:50 -0400 | [diff] [blame] | 4 | #include <linux/fs.h> |
| 5 | |
| Steven Rostedt | 9504504 | 2009-04-11 12:59:57 -0400 | [diff] [blame] | 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))); |
| 30 | extern int |
| 31 | trace_seq_bprintf(struct trace_seq *s, const char *fmt, const u32 *binary); |
| 32 | extern void trace_print_seq(struct seq_file *m, struct trace_seq *s); |
| 33 | extern ssize_t trace_seq_to_user(struct trace_seq *s, char __user *ubuf, |
| 34 | size_t cnt); |
| 35 | extern int trace_seq_puts(struct trace_seq *s, const char *str); |
| 36 | extern int trace_seq_putc(struct trace_seq *s, unsigned char c); |
| 37 | extern int trace_seq_putmem(struct trace_seq *s, const void *mem, size_t len); |
| 38 | extern int trace_seq_putmem_hex(struct trace_seq *s, const void *mem, |
| 39 | size_t len); |
| 40 | extern void *trace_seq_reserve(struct trace_seq *s, size_t len); |
| 41 | extern int trace_seq_path(struct trace_seq *s, struct path *path); |
| 42 | |
| 43 | #else /* CONFIG_TRACING */ |
| 44 | static inline int trace_seq_printf(struct trace_seq *s, const char *fmt, ...) |
| Steven Rostedt | 9504504 | 2009-04-11 12:59:57 -0400 | [diff] [blame] | 45 | { |
| 46 | return 0; |
| 47 | } |
| 48 | static inline int |
| 49 | trace_seq_bprintf(struct trace_seq *s, const char *fmt, const u32 *binary) |
| 50 | { |
| 51 | return 0; |
| 52 | } |
| 53 | |
| 54 | static inline void trace_print_seq(struct seq_file *m, struct trace_seq *s) |
| 55 | { |
| 56 | } |
| 57 | static inline ssize_t trace_seq_to_user(struct trace_seq *s, char __user *ubuf, |
| 58 | size_t cnt) |
| 59 | { |
| 60 | return 0; |
| 61 | } |
| 62 | static inline int trace_seq_puts(struct trace_seq *s, const char *str) |
| 63 | { |
| 64 | return 0; |
| 65 | } |
| Steven Rostedt | 23de29d | 2009-04-20 12:59:29 -0400 | [diff] [blame^] | 66 | static inline int trace_seq_putc(struct trace_seq *s, unsigned char c) |
| Steven Rostedt | 9504504 | 2009-04-11 12:59:57 -0400 | [diff] [blame] | 67 | { |
| 68 | return 0; |
| 69 | } |
| 70 | static inline int |
| 71 | trace_seq_putmem(struct trace_seq *s, const void *mem, size_t len) |
| 72 | { |
| 73 | return 0; |
| 74 | } |
| 75 | static inline int trace_seq_putmem_hex(struct trace_seq *s, const void *mem, |
| 76 | size_t len) |
| 77 | { |
| 78 | return 0; |
| 79 | } |
| 80 | static inline void *trace_seq_reserve(struct trace_seq *s, size_t len) |
| 81 | { |
| 82 | return NULL; |
| 83 | } |
| 84 | static inline int trace_seq_path(struct trace_seq *s, struct path *path) |
| 85 | { |
| 86 | return 0; |
| 87 | } |
| 88 | #endif /* CONFIG_TRACING */ |
| 89 | |
| 90 | #endif /* _LINUX_TRACE_SEQ_H */ |