Add module-unloading capabilities to ltt-disarmall

[ltt-control.git] / lttctl / ltt-disarmall.sh

diff --git a/lttctl/ltt-disarmall.sh b/lttctl/ltt-disarmall.sh
index 2b5704f4d6eebb003cc03e1904cb22178a056c5c..d60a54eee50cd45546e269d8dd4b00f56b4743bd 100755 (executable)
--- a/lttctl/ltt-disarmall.sh
+++ b/lttctl/ltt-disarmall.sh
@@ -1,5 +1,5 @@
-#!/bin/bash
 # Copyright (C) 2009 Benjamin Poirier
+# Copyright (C) 2010 Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
 
 # This program is free software; you can redistribute it and/or modify
 # it under the terms of the GNU General Public License as published by
@@ -15,8 +15,10 @@
 # with this program; if not, write to the Free Software Foundation, Inc.,
 # 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
 
-DEBUGFSROOT=$(grep ^debugfs /proc/mounts | head -1 | awk '{print $2}')
+DEBUGFSROOT=$(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
@@ -28,18 +30,23 @@ usage () {
        echo "" > /dev/stderr
 }
 
-if [ ! "$DEBUGFSROOT" ]; then
+if [ "$(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;
 fi
 
-if [ ! -d "$MARKERSROOT" ]; then
+if [ ! -d "${MARKERSROOT}" ]; then
        echo "Error: LTT trace controller not found (did you compile and load LTTng?)" > /dev/stderr
        exit 1;
 fi
 
 while getopts "qh" options; do
-       case $options in
+       case ${options} in
                q) QUIET="0";;
                h) usage;
                        exit 0;;
@@ -47,15 +54,24 @@ while getopts "qh" options; do
                        exit 1;;
        esac
 done
-shift $(($OPTIND - 1))
+shift $((${OPTIND} - 1))
 
-while read -r -d $'\0' marker; do
-       grep "^1$" "$marker" -q
+(eval "find '${MARKERSROOT}' -name metadata -prune -o -name enable -print") | while read -r marker; do
+       grep "^1$" "${marker}" -q
        if [ $? -ne 0 ]; then
                continue
        fi
-       if [ ! $QUIET ]; then
+       if [ ! ${QUIET} ]; then
                echo "Disconnecting ${marker%/enable}"
        fi
-       echo 0 > $marker
-done < <(eval "find '$MARKERSROOT' -name metadata -prune -o -name enable -print0")
+       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
+