1 #ifndef _LINUX_TRACE_SEQ_H
2 #define _LINUX_TRACE_SEQ_H
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).
14 unsigned char buffer[PAGE_SIZE];
21 trace_seq_init(struct trace_seq *s)
29 * trace_seq_buffer_ptr - return pointer to next location in buffer
30 * @s: trace sequence descriptor
32 * Returns the pointer to the buffer where the next write to
33 * the buffer will happen. This is useful to save the location
34 * that is about to be written to and then return the result
37 static inline unsigned char *
38 trace_seq_buffer_ptr(struct trace_seq *s)
40 return s->buffer + s->len;
44 * Currently only defined when tracing is enabled.
48 int trace_seq_printf(struct trace_seq *s, const char *fmt, ...);
50 int trace_seq_vprintf(struct trace_seq *s, const char *fmt, va_list args);
52 trace_seq_bprintf(struct trace_seq *s, const char *fmt, const u32 *binary);
53 extern int trace_print_seq(struct seq_file *m, struct trace_seq *s);
54 extern int trace_seq_to_user(struct trace_seq *s, char __user *ubuf,
56 extern int trace_seq_puts(struct trace_seq *s, const char *str);
57 extern int trace_seq_putc(struct trace_seq *s, unsigned char c);
58 extern int trace_seq_putmem(struct trace_seq *s, const void *mem, unsigned int len);
59 extern int trace_seq_putmem_hex(struct trace_seq *s, const void *mem,
61 extern int trace_seq_path(struct trace_seq *s, const struct path *path);
63 extern int trace_seq_bitmask(struct trace_seq *s, const unsigned long *maskp,
66 #else /* CONFIG_TRACING */
67 static inline int trace_seq_printf(struct trace_seq *s, const char *fmt, ...)
72 trace_seq_bprintf(struct trace_seq *s, const char *fmt, const u32 *binary)
78 trace_seq_bitmask(struct trace_seq *s, const unsigned long *maskp,
84 static inline int trace_print_seq(struct seq_file *m, struct trace_seq *s)
88 static inline int trace_seq_to_user(struct trace_seq *s, char __user *ubuf,
93 static inline int trace_seq_puts(struct trace_seq *s, const char *str)
97 static inline int trace_seq_putc(struct trace_seq *s, unsigned char c)
102 trace_seq_putmem(struct trace_seq *s, const void *mem, unsigned int len)
106 static inline int trace_seq_putmem_hex(struct trace_seq *s, const void *mem,
111 static inline int trace_seq_path(struct trace_seq *s, const struct path *path)
115 #endif /* CONFIG_TRACING */
117 #endif /* _LINUX_TRACE_SEQ_H */