#ifndef _LINUX_TRACE_SEQ_H #define _LINUX_TRACE_SEQ_H #include <linux/fs.h> #include <asm/page.h> /* * Trace sequences are used to allow a function to call several other functions * to create a string of data to use (up to a max of PAGE_SIZE). */ struct trace_seq { unsigned char buffer[PAGE_SIZE]; unsigned int len; unsigned int readpos; int full; }; static inline void trace_seq_init(struct trace_seq *s) { s->len = 0; s->readpos = 0; s->full = 0; } /* * Currently only defined when tracing is enabled. */ #ifdef CONFIG_TRACING extern __printf(2, 3) int trace_seq_printf(struct trace_seq *s, const char *fmt, ...); extern __printf(2, 0) int trace_seq_vprintf(struct trace_seq *s, const char *fmt, va_list args); extern int trace_seq_bprintf(struct trace_seq *s, const char *fmt, const u32 *binary); extern int trace_print_seq(struct seq_file *m, struct trace_seq *s); extern ssize_t trace_seq_to_user(struct trace_seq *s, char __user *ubuf, size_t cnt); extern int trace_seq_puts(struct trace_seq *s, const char *str); extern int trace_seq_putc(struct trace_seq *s, unsigned char c); extern int trace_seq_putmem(struct trace_seq *s, const void *mem, size_t len); extern int trace_seq_putmem_hex(struct trace_seq *s, const void *mem, size_t len); extern void *trace_seq_reserve(struct trace_seq *s, size_t len); extern int trace_seq_path(struct trace_seq *s, const struct path *path); #else /* CONFIG_TRACING */ static inline int trace_seq_printf(struct trace_seq *s, const char *fmt, ...) { return 0; } static inline int trace_seq_bprintf(struct trace_seq *s, const char *fmt, const u32 *binary) { return 0; } static inline int trace_print_seq(struct seq_file *m, struct trace_seq *s) { return 0; } static inline ssize_t trace_seq_to_user(struct trace_seq *s, char __user *ubuf, size_t cnt) { return 0; } static inline int trace_seq_puts(struct trace_seq *s, const char *str) { return 0; } static inline int trace_seq_putc(struct trace_seq *s, unsigned char c) { return 0; } static inline int trace_seq_putmem(struct trace_seq *s, const void *mem, size_t len) { return 0; } static inline int trace_seq_putmem_hex(struct trace_seq *s, const void *mem, size_t len) { return 0; } static inline void *trace_seq_reserve(struct trace_seq *s, size_t len) { return NULL; } static inline int trace_seq_path(struct trace_seq *s, const struct path *path) { return 0; } #endif /* CONFIG_TRACING */ #endif /* _LINUX_TRACE_SEQ_H */