Add module-unloading capabilities to ltt-disarmall

Make ltt-disarmall unload all the kernel modules before exiting.

The module list is not in the same order as in ltt-armall, because
of some dependencies between the modules.

Signed-off-by: Alexandre Montplaisir <alexandre.montplaisir@gmail.com>
Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>

diff --git a/lttctl/ltt-disarmall.sh b/lttctl/ltt-disarmall.sh
index 56dc3a0b1e48644caae856da3849b4a9061ed7c1..d60a54eee50cd45546e269d8dd4b00f56b4743bd 100755 (executable)
--- a/lttctl/ltt-disarmall.sh
+++ b/lttctl/ltt-disarmall.sh
@@ -17,6 +17,8 @@
 
 DEBUGFSROOT=$(awk '{if ($3 == "debugfs") print $2}' /proc/mounts | head -n 1)
 MARKERSROOT=${DEBUGFSROOT}/ltt/markers
+DEFAULTMODULES="ltt-trace-control ltt-marker-control ltt-kprobes ltt-userspace-event ltt-statedump ipc-trace kernel-trace mm-trace net-trace fs-trace jbd2-trace syscall-trace trap-trace block-trace rcu-trace ltt-relay ltt-tracer"
+EXTRAMODULES="lockdep-trace net-extended-trace"
 
 usage () {
        echo "Usage: $0 [OPTION]..." > /dev/stderr
@@ -28,6 +30,11 @@ usage () {
        echo "" > /dev/stderr
 }
 
+if [ "$(id -u)" != "0" ]; then
+       echo "Error: This script needs to be run as root." > /dev/stderr
+       exit 1;
+fi
+
 if [ ! "${DEBUGFSROOT}" ]; then
        echo "Error: debugfs not mounted" > /dev/stderr
        exit 1;
@@ -59,3 +66,12 @@ shift $((${OPTIND} - 1))
        fi
        echo 0 > ${marker}
 done
+
+#Unload the kernel modules
+for i in ${EXTRAMODULES}; do
+       rmmod $i 2> /dev/null
+done
+for i in ${DEFAULTMODULES}; do
+       rmmod $i
+done
+