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authorLi Zefan <lizf@cn.fujitsu.com>2010-01-14 10:53:02 +0800
committerSteven Rostedt <rostedt@goodmis.org>2010-01-14 22:38:03 -0500
commit751e9983ee276cb150e8812b1d995f6035a63878 (patch)
tree7f9abfa2ea11bcc2ccfa9922af17811d5020fa69 /kernel/trace
parentb82a4045f7962483a78a874343dc6e31b79c96c1 (diff)
ftrace: Fix MATCH_END_ONLY function filter
For '*foo' pattern, we should allow any string ending with 'foo', but ftrace filter incorrectly disallows strings like bar_foo_foo: # echo '*io' > set_ftrace_filter # cat set_ftrace_filter | grep 'req_bio_endio' # cat available_filter_functions | grep 'req_bio_endio' req_bio_endio Signed-off-by: Li Zefan <lizf@cn.fujitsu.com> LKML-Reference: <4B4E870E.6060607@cn.fujitsu.com> Acked-by: Frederic Weisbecker <fweisbec@gmail.com> Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
Diffstat (limited to 'kernel/trace')
-rw-r--r--kernel/trace/ftrace.c6
1 files changed, 3 insertions, 3 deletions
diff --git a/kernel/trace/ftrace.c b/kernel/trace/ftrace.c
index 7968762c816..1e6640f8045 100644
--- a/kernel/trace/ftrace.c
+++ b/kernel/trace/ftrace.c
@@ -1690,7 +1690,7 @@ ftrace_regex_lseek(struct file *file, loff_t offset, int origin)
static int ftrace_match(char *str, char *regex, int len, int type)
{
int matched = 0;
- char *ptr;
+ int slen;
switch (type) {
case MATCH_FULL:
@@ -1706,8 +1706,8 @@ static int ftrace_match(char *str, char *regex, int len, int type)
matched = 1;
break;
case MATCH_END_ONLY:
- ptr = strstr(str, regex);
- if (ptr && (ptr[len] == 0))
+ slen = strlen(str);
+ if (slen >= len && memcmp(str + slen - len, regex, len) == 0)
matched = 1;
break;
}