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