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authorFrederic Weisbecker <fweisbec@gmail.com>2009-09-24 21:31:51 +0200
committerFrederic Weisbecker <fweisbec@gmail.com>2009-09-24 21:40:13 +0200
commit3f6fe06dbf67b46d36fedec502300e04dffeb67a (patch)
tree3879fe89257ded94190ad8f1835f0320eb19f610 /kernel/trace/ftrace.c
parent1889d20922d14a97b2099fa4d47587217c0ba48b (diff)
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>
Diffstat (limited to 'kernel/trace/ftrace.c')
-rw-r--r--kernel/trace/ftrace.c64
1 files changed, 5 insertions, 59 deletions
diff --git a/kernel/trace/ftrace.c b/kernel/trace/ftrace.c
index cc615f84751..ddf23a225b5 100644
--- a/kernel/trace/ftrace.c
+++ b/kernel/trace/ftrace.c
@@ -1655,60 +1655,6 @@ ftrace_regex_lseek(struct file *file, loff_t offset, int origin)
return ret;
}
-enum {
- MATCH_FULL,
- MATCH_FRONT_ONLY,
- MATCH_MIDDLE_ONLY,
- MATCH_END_ONLY,
-};
-
-/*
- * (static function - no need for kernel doc)
- *
- * Pass in a buffer containing a glob and this function will
- * set search to point to the search part of the buffer and
- * return the type of search it is (see enum above).
- * This does modify buff.
- *
- * Returns enum type.
- * search returns the pointer to use for comparison.
- * not returns 1 if buff started with a '!'
- * 0 otherwise.
- */
-static int
-ftrace_setup_glob(char *buff, int len, char **search, int *not)
-{
- int type = MATCH_FULL;
- int i;
-
- if (buff[0] == '!') {
- *not = 1;
- buff++;
- len--;
- } else
- *not = 0;
-
- *search = buff;
-
- for (i = 0; i < len; i++) {
- if (buff[i] == '*') {
- if (!i) {
- *search = buff + 1;
- type = MATCH_END_ONLY;
- } else {
- if (type == MATCH_END_ONLY)
- type = MATCH_MIDDLE_ONLY;
- else
- type = MATCH_FRONT_ONLY;
- buff[i] = 0;
- break;
- }
- }
- }
-
- return type;
-}
-
static int ftrace_match(char *str, char *regex, int len, int type)
{
int matched = 0;
@@ -1757,7 +1703,7 @@ static void ftrace_match_records(char *buff, int len, int enable)
int not;
flag = enable ? FTRACE_FL_FILTER : FTRACE_FL_NOTRACE;
- type = ftrace_setup_glob(buff, len, &search, &not);
+ type = filter_parse_regex(buff, len, &search, &not);
search_len = strlen(search);
@@ -1825,7 +1771,7 @@ static void ftrace_match_module_records(char *buff, char *mod, int enable)
}
if (strlen(buff)) {
- type = ftrace_setup_glob(buff, strlen(buff), &search, &not);
+ type = filter_parse_regex(buff, strlen(buff), &search, &not);
search_len = strlen(search);
}
@@ -1990,7 +1936,7 @@ register_ftrace_function_probe(char *glob, struct ftrace_probe_ops *ops,
int count = 0;
char *search;
- type = ftrace_setup_glob(glob, strlen(glob), &search, &not);
+ type = filter_parse_regex(glob, strlen(glob), &search, &not);
len = strlen(search);
/* we do not support '!' for function probes */
@@ -2067,7 +2013,7 @@ __unregister_ftrace_function_probe(char *glob, struct ftrace_probe_ops *ops,
else if (glob) {
int not;
- type = ftrace_setup_glob(glob, strlen(glob), &search, &not);
+ type = filter_parse_regex(glob, strlen(glob), &search, &not);
len = strlen(search);
/* we do not support '!' for function probes */
@@ -2520,7 +2466,7 @@ ftrace_set_func(unsigned long *array, int *idx, char *buffer)
return -ENODEV;
/* decode regex */
- type = ftrace_setup_glob(buffer, strlen(buffer), &search, &not);
+ type = filter_parse_regex(buffer, strlen(buffer), &search, &not);
if (not)
return -EINVAL;