1 files changed, 63 insertions, 0 deletions

diff --git a/kernel/trace/trace_output.h b/kernel/trace/trace_output.h
new file mode 100644
index 000000000000..3b90e6ade1aa
--- /dev/null
+++ b/kernel/trace/trace_output.h
@@ -0,0 +1,63 @@
+#ifndef __TRACE_EVENTS_H
+#define __TRACE_EVENTS_H
+
+#include "trace.h"
+
+typedef enum print_line_t (*trace_print_func)(struct trace_iterator *iter,
+                                              int flags);
+
+struct trace_event {
+        struct hlist_node       node;
+        int                     type;
+        trace_print_func        trace;
+        trace_print_func        raw;
+        trace_print_func        hex;
+        trace_print_func        binary;
+};
+
+extern int trace_seq_printf(struct trace_seq *s, const char *fmt, ...)
+        __attribute__ ((format (printf, 2, 3)));
+extern int
+trace_seq_bprintf(struct trace_seq *s, const char *fmt, const u32 *binary);
+extern int
+seq_print_ip_sym(struct trace_seq *s, unsigned long ip,
+                unsigned long sym_flags);
+extern ssize_t trace_seq_to_user(struct trace_seq *s, char __user *ubuf,
+                                 size_t cnt);
+int trace_seq_puts(struct trace_seq *s, const char *str);
+int trace_seq_putc(struct trace_seq *s, unsigned char c);
+int trace_seq_putmem(struct trace_seq *s, void *mem, size_t len);
+int trace_seq_putmem_hex(struct trace_seq *s, void *mem, size_t len);
+int trace_seq_path(struct trace_seq *s, struct path *path);
+int seq_print_userip_objs(const struct userstack_entry *entry,
+                          struct trace_seq *s, unsigned long sym_flags);
+int seq_print_user_ip(struct trace_seq *s, struct mm_struct *mm,
+                      unsigned long ip, unsigned long sym_flags);
+
+int trace_print_context(struct trace_iterator *iter);
+int trace_print_lat_context(struct trace_iterator *iter);
+
+struct trace_event *ftrace_find_event(int type);
+int register_ftrace_event(struct trace_event *event);
+int unregister_ftrace_event(struct trace_event *event);
+
+enum print_line_t trace_nop_print(struct trace_iterator *iter, int flags);
+
+#define MAX_MEMHEX_BYTES        8
+#define HEX_CHARS               (MAX_MEMHEX_BYTES*2 + 1)
+
+#define SEQ_PUT_FIELD_RET(s, x)                         \
+do {                                                    \
+        if (!trace_seq_putmem(s, &(x), sizeof(x)))      \
+                return TRACE_TYPE_PARTIAL_LINE;         \
+} while (0)
+
+#define SEQ_PUT_HEX_FIELD_RET(s, x)                     \
+do {                                                    \
+        BUILD_BUG_ON(sizeof(x) > MAX_MEMHEX_BYTES);     \
+        if (!trace_seq_putmem_hex(s, &(x), sizeof(x)))  \
+                return TRACE_TYPE_PARTIAL_LINE;         \
+} while (0)
+
+#endif
+