tracing/filters: Add __field_ext() to TRACE_EVENT

Add __field_ext(), so a field can be assigned to a specific
filter_type, which matches a corresponding filter function.

For example, a later patch will allow this:
	__field_ext(const char *, str, FILTER_PTR_STR);

Signed-off-by: Li Zefan <lizf@cn.fujitsu.com>
LKML-Reference: <4A7B9272.6050709@cn.fujitsu.com>

[
  Fixed a -1 to FILTER_OTHER
  Forward ported to latest kernel.
]

Signed-off-by: Steven Rostedt <rostedt@goodmis.org>

1 files changed, 24 insertions, 7 deletions

diff --git a/include/trace/ftrace.h b/include/trace/ftrace.h
index 127400255e4c..1b1f742a6045 100644
--- a/include/trace/ftrace.h
+++ b/include/trace/ftrace.h
@@ -21,6 +21,9 @@
 #undef __field
 #define __field(type, item)             type    item;
 
+#undef __field_ext
+#define __field_ext(type, item, filter_type)    type    item;
+
 #undef __array
 #define __array(type, item, len)        type    item[len];
 
@@ -62,7 +65,10 @@
  */
 
 #undef __field
-#define __field(type, item);
+#define __field(type, item)
+
+#undef __field_ext
+#define __field_ext(type, item, filter_type)
 
 #undef __array
 #define __array(type, item, len)
@@ -110,6 +116,9 @@
         if (!ret)                                                       \
                 return 0;
 
+#undef __field_ext
+#define __field_ext(type, item, filter_type)    __field(type, item)
+
 #undef __array
 #define __array(type, item, len)                                                \
         ret = trace_seq_printf(s, "\tfield:" #type " " #item "[" #len "];\t"    \
@@ -265,28 +274,33 @@ ftrace_raw_output_##call(struct trace_iterator *iter, int flags)	\
         
 #include TRACE_INCLUDE(TRACE_INCLUDE_FILE)
 
-#undef __field
-#define __field(type, item)                                             \
+#undef __field_ext
+#define __field_ext(type, item, filter_type)                            \
         ret = trace_define_field(event_call, #type, #item,              \
                                  offsetof(typeof(field), item),         \
-                                 sizeof(field.item), is_signed_type(type));     \
+                                 sizeof(field.item),                    \
+                                 is_signed_type(type), filter_type);    \
         if (ret)                                                        \
                 return ret;
 
+#undef __field
+#define __field(type, item)     __field_ext(type, item, FILTER_OTHER)
+
 #undef __array
 #define __array(type, item, len)                                        \
         BUILD_BUG_ON(len > MAX_FILTER_STR_VAL);                         \
         ret = trace_define_field(event_call, #type "[" #len "]", #item, \
                                  offsetof(typeof(field), item),         \
-                                 sizeof(field.item), 0);                \
+                                 sizeof(field.item), 0, FILTER_OTHER);  \
         if (ret)                                                        \
                 return ret;
 
 #undef __dynamic_array
 #define __dynamic_array(type, item, len)                                       \
         ret = trace_define_field(event_call, "__data_loc " #type "[]", #item,  \
-                                offsetof(typeof(field), __data_loc_##item),    \
-                                 sizeof(field.__data_loc_##item), 0);
+                                 offsetof(typeof(field), __data_loc_##item),   \
+                                 sizeof(field.__data_loc_##item), 0,           \
+                                 FILTER_OTHER);
 
 #undef __string
 #define __string(item, src) __dynamic_array(char, item, -1)
@@ -320,6 +334,9 @@ ftrace_define_fields_##call(struct ftrace_event_call *event_call)	\
 #undef __field
 #define __field(type, item)
 
+#undef __field_ext
+#define __field_ext(type, item, filter_type)
+
 #undef __array
 #define __array(type, item, len)