-#!/bin/sh
+#!/bin/bash
#
-# remove all lustre modules. Won't succeed if they're in use, or if you
-# manually did a 'lctl network up'.
+# Takes a list of modules and unloads them and all dependent modules.
+# If a module cannot be unloaded (e.g. it's in use), an error is
+# returned.
###############################################################################
-FSTYPE=${1:-ldiskfs}
+SCRIPT_NAME="$(basename "$0")"
+LCTL=${LCTL:-lctl}
+DEBUG='false'
+[[ -n $DEBUG_RMMOD ]] && DEBUG='true'
-TMP=${TMP:-/tmp}
-LUSTRE=${LUSTRE:-$(cd $(dirname $0)/..; echo $PWD)}
-LCTL=${LCTL:-"$LUSTRE/utils/lctl"}
-[ ! -f "$LCTL" ] && export LCTL=$(which lctl 2> /dev/null)
+# Print help message
+print_usage() {
+ echo "$SCRIPT_NAME -h|--help"
+ echo "$SCRIPT_NAME [-d|--debug-kernel] [modulesname...]"
+ echo
+ echo -e "\t-h, --help\t\tDisplay this help message"
+ echo -e "\t-d, --debug-kernel\tDisplay lustre kernel debug messages"
+ echo -e "\tmodulesname\t\tList of lustre modules to unload. By default"
+ echo -e "\t\t\t\tldiskfs and libcfs (and their dependencies) are"
+ echo -e "\t\t\t\tselected."
+}
-RMMOD=rmmod
-if [ `uname -r | cut -c 3` -eq 4 ]; then
- RMMOD="modprobe -r"
-fi
+# Print kernel debug message for lustre modules
+print_debug() {
+ local debug_file
+ $LCTL mark "$SCRIPT_NAME : Stop debug"
+ if [[ $DEBUG_RMMOD == "-" ]]; then
+ debug_file="" # dump to stdout
+ else
+ debug_file=$DEBUG_RMMOD
+ fi
+ $LCTL debug_kernel $debug_file
+ DEBUG='false'
+}
+
+# Unload all modules dependent on $1 (exclude removal of $1)
+unload_dep_modules_exclusive() {
+ local MODULE=$1
+
+ local DEPS="$(lsmod | awk '($1 == "'$MODULE'") { print $4 }')"
+ for SUBMOD in $(echo $DEPS | tr ',' ' '); do
+ unload_dep_modules_inclusive $SUBMOD || return 1
+ done
+ return 0
+}
-unload_dep_module() {
- # libcfs 107852 17 lustre,obdfilter,ost,...
- local MODULE=$1
- local DEPS="$(lsmod | awk '($1 == "'$MODULE'") { print $4 }' | tr ',' ' ')"
- for SUBMOD in $DEPS; do
- unload_dep_module $SUBMOD
- done
- [ "$MODULE" = "libcfs" ] && $LCTL dk $TMP/debug >/dev/null || true
- $RMMOD $MODULE 2>/dev/null || true
- return 0
+# Unload all modules dependent on $1 (include removal of $1)
+unload_dep_modules_inclusive() {
+ local MODULE=$1
+
+ # if $MODULE not loaded, return 0
+ lsmod | egrep -q "^\<$MODULE\>" || return 0
+ unload_dep_modules_exclusive $MODULE || return 1
+
+ if $DEBUG; then
+ if [ "$MODULE" = 'libcfs' ]; then
+ print_debug
+ fi
+ $LCTL mark "$SCRIPT_NAME : Unload $MODULE"
+ fi
+
+ rmmod $MODULE || return 1
+ return 0
}
-lsmod | grep obdclass > /dev/null && $LCTL dl
-lsmod | grep $FSTYPE > /dev/null && unload_dep_module $FSTYPE
-lsmod | grep ptlrpc > /dev/null && unload_dep_module ptlrpc
-lsmod | grep libcfs > /dev/null && unload_dep_module libcfs
+declare -a modules
+while [ $# -gt 0 ]; do
+ case "$1" in
+ -h|--help)
+ print_usage >&2
+ exit 0
+ ;;
+ -d|--debug-kernel)
+ if lsmod | egrep -q '^libcfs'; then
+ DEBUG='true'
+ else
+ echo "Debug unavailable: libcfs is not loaded" >&2
+ fi
+ ;;
+ -*)
+ echo "Error invalid option" >&2
+ print_usage >&2
+ exit 2
+ ;;
+ *)
+ modules+=("$1")
+ ;;
+ esac
+ shift
+done
-MODULES=$($LCTL modules | awk '{ print $2 }')
-if [ -n "$MODULES" ]; then
- echo "Modules still loaded: "
- echo $MODULES
- exit 1
+# To maintain backwards compatibility, ldiskfs and libcfs must be
+# unloaded if no parameters are given, or if only the ldiskfs parameter
+# is given. It's ugly, but is needed to emulate the prior functionality
+if [ "${#modules[@]}" -eq 0 ] || [ "${modules[*]}" = "ldiskfs" ]; then
+ unload_all=true
+ modules=('lnet_selftest' 'ldiskfs' 'libcfs')
+else
+ unload_all=false
+fi
+
+if [ -f /sys/kernel/debug/kmemleak ] ; then
+ cat /proc/modules >/tmp/kmemleak-modules-list.txt
+ echo scan > /sys/kernel/debug/kmemleak
+ cat /sys/kernel/debug/kmemleak > /tmp/kmemleak-before-unload.txt
+ test -s /tmp/kmemleak-before-unload.txt && logger -t leak-pre -f /tmp/kmemleak-before-unload.txt
+ rm /tmp/kmemleak-before-unload.txt
+ # Clear everything here so that only new leaks show up
+ # after module unload
+ echo clear > /sys/kernel/debug/kmemleak
fi
-exit 0
+# Manage debug
+if $DEBUG; then
+ echo "Lustre debug parameters:" >&2
+ $LCTL get_param debug >&2
+ $LCTL get_param debug_mb >&2
+
+ $LCTL mark "$SCRIPT_NAME : Start debug"
+fi
+
+if $unload_all; then
+ unload_dep_modules_inclusive 'ptlrpc' || exit 1
+ # LNet may have an internal ref which can prevent LND modules from
+ # unloading. Try to drop it before unloading modules.
+ # NB: we squelch stderr because lnetctl/lctl may complain about
+ # LNet being "busy", but this is normal. We're making a best effort
+ # here.
+ # Prefer lnetctl if it is present
+ if [ -n "$(which lnetctl 2>/dev/null)" ]; then
+ lnetctl lnet unconfigure 2>/dev/null
+ elif [ -n "$(which lctl 2>/dev/null)" ]; then
+ lctl net down 2>/dev/null | grep -v "LNET ready to unload"
+ fi
+fi
+
+for mod in ${modules[*]}; do
+ unload_dep_modules_inclusive $mod || exit 1
+done
+
+if $DEBUG; then
+ print_debug
+fi
+
+if [ -f /sys/kernel/debug/kmemleak ] ; then
+ echo scan > /sys/kernel/debug/kmemleak
+ cat /sys/kernel/debug/kmemleak > /tmp/kmemleak-after-unload.txt
+ test -s /tmp/kmemleak-after-unload.txt && logger -t leak-mods -f /tmp/kmemleak-modules-list.txt && logger -t leak-post -f /tmp/kmemleak-after-unload.txt
+ rm -f /tmp/kmemleak-after-unload.txt /tmp/kmemleak-modules-list.txt
+fi
+
+exit 0
git://git.whamcloud.com / fs / lustre-release.git / blobdiff