tracing/filters: Unify the regex parsing helpers
The filter code has stolen the regex parsing function from ftrace to
get the regex support.
We have duplicated this code, so factorize it in the filter area and
make it generally available, as the filter code is the most suited to
host this feature.
Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: Tom Zanussi <tzanussi@gmail.com>
Cc: Li Zefan <lizf@cn.fujitsu.com>
diff --git a/kernel/trace/trace.h b/kernel/trace/trace.h
index 8d0db60..db6b83e 100644
--- a/kernel/trace/trace.h
+++ b/kernel/trace/trace.h
@@ -709,6 +709,13 @@
typedef int (*regex_match_func)(char *str, struct regex *r, int len);
+enum regex_type {
+ MATCH_FULL,
+ MATCH_FRONT_ONLY,
+ MATCH_MIDDLE_ONLY,
+ MATCH_END_ONLY,
+};
+
struct regex {
char pattern[MAX_FILTER_STR_VAL];
int len;
@@ -727,6 +734,8 @@
int pop_n;
};
+extern enum regex_type
+filter_parse_regex(char *buff, int len, char **search, int *not);
extern void print_event_filter(struct ftrace_event_call *call,
struct trace_seq *s);
extern int apply_event_filter(struct ftrace_event_call *call,
