selftests: ftrace: Add a way to reset triggers in the set_ftrace_filter file
Just writing into the set_ftrace_filter file does not reset triggers, even
though it can reset the function list. Triggers require writing the trigger
name with a "!" prepended. It's worse that it requires the number if the
trigger has a count associated to it.
Add a reset_ftrace_filter function to the ftrace self tests to allow for the
tests to have a generic way to clear them. It also resets any functions that
are listed in that file as well.
Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
diff --git a/tools/testing/selftests/ftrace/test.d/functions b/tools/testing/selftests/ftrace/test.d/functions
index 91de1a8..9aec6fc 100644
--- a/tools/testing/selftests/ftrace/test.d/functions
+++ b/tools/testing/selftests/ftrace/test.d/functions
@@ -30,6 +30,27 @@
done
}
+reset_ftrace_filter() { # reset all triggers in set_ftrace_filter
+ echo > set_ftrace_filter
+ grep -v '^#' set_ftrace_filter | while read t; do
+ tr=`echo $t | cut -d: -f2`
+ if [ "$tr" == "" ]; then
+ continue
+ fi
+ if [ $tr == "enable_event" -o $tr == "disable_event" ]; then
+ tr=`echo $t | cut -d: -f1-4`
+ limit=`echo $t | cut -d: -f5`
+ else
+ tr=`echo $t | cut -d: -f1-2`
+ limit=`echo $t | cut -d: -f3`
+ fi
+ if [ "$limit" != "unlimited" ]; then
+ tr="$tr:$limit"
+ fi
+ echo "!$tr" > set_ftrace_filter
+ done
+}
+
disable_events() {
echo 0 > events/enable
}