kernel/trace/trace_output.h

   1 #ifndef __TRACE_EVENTS_H
   2 #define __TRACE_EVENTS_H
   3
   4 #include "trace.h"
   5
   6 typedef enum print_line_t (*trace_print_func)(struct trace_iterator *iter,
   7                                               int flags);
   8
   9 struct trace_event {
  10         struct hlist_node       node;
  11         int                     type;
  12         trace_print_func        trace;
  13         trace_print_func        raw;
  14         trace_print_func        hex;
  15         trace_print_func        binary;
  16 };
  17
  18 extern enum print_line_t
  19 trace_print_bprintk_msg_only(struct trace_iterator *iter);
  20 extern enum print_line_t
  21 trace_print_printk_msg_only(struct trace_iterator *iter);
  22
  23 extern int trace_seq_printf(struct trace_seq *s, const char *fmt, ...)
  24         __attribute__ ((format (printf, 2, 3)));
  25 extern int
  26 trace_seq_bprintf(struct trace_seq *s, const char *fmt, const u32 *binary);
  27 extern int
  28 seq_print_ip_sym(struct trace_seq *s, unsigned long ip,
  29                 unsigned long sym_flags);
  30 extern ssize_t trace_seq_to_user(struct trace_seq *s, char __user *ubuf,
  31                                  size_t cnt);
  32 extern int trace_seq_puts(struct trace_seq *s, const char *str);
  33 extern int trace_seq_putc(struct trace_seq *s, unsigned char c);
  34 extern int trace_seq_putmem(struct trace_seq *s, const void *mem, size_t len);
  35 extern int trace_seq_putmem_hex(struct trace_seq *s, const void *mem,
  36                                 size_t len);
  37 extern void *trace_seq_reserve(struct trace_seq *s, size_t len);
  38 extern int trace_seq_path(struct trace_seq *s, struct path *path);
  39 extern int seq_print_userip_objs(const struct userstack_entry *entry,
  40                                  struct trace_seq *s, unsigned long sym_flags);
  41 extern int seq_print_user_ip(struct trace_seq *s, struct mm_struct *mm,
  42                              unsigned long ip, unsigned long sym_flags);
  43
  44 extern int trace_print_context(struct trace_iterator *iter);
  45 extern int trace_print_lat_context(struct trace_iterator *iter);
  46
  47 extern struct trace_event *ftrace_find_event(int type);
  48 extern int register_ftrace_event(struct trace_event *event);
  49 extern int unregister_ftrace_event(struct trace_event *event);
  50
  51 extern enum print_line_t trace_nop_print(struct trace_iterator *iter,
  52                                          int flags);
  53
  54 #define MAX_MEMHEX_BYTES        8
  55 #define HEX_CHARS               (MAX_MEMHEX_BYTES*2 + 1)
  56
  57 #define SEQ_PUT_FIELD_RET(s, x)                         \
  58 do {                                                    \
  59         if (!trace_seq_putmem(s, &(x), sizeof(x)))      \
  60                 return TRACE_TYPE_PARTIAL_LINE;         \
  61 } while (0)
  62
  63 #define SEQ_PUT_HEX_FIELD_RET(s, x)                     \
  64 do {                                                    \
  65         BUILD_BUG_ON(sizeof(x) > MAX_MEMHEX_BYTES);     \
  66         if (!trace_seq_putmem_hex(s, &(x), sizeof(x)))  \
  67                 return TRACE_TYPE_PARTIAL_LINE;         \
  68 } while (0)
  69
  70 #endif
  71