#!/bin/sh # # A simple script to load/unload the ZFS module stack. # BASE_DIR=$(dirname "$0") SCRIPT_COMMON=common.sh if [ -f "${BASE_DIR}/${SCRIPT_COMMON}" ]; then . "${BASE_DIR}/${SCRIPT_COMMON}" else echo "Missing helper script ${SCRIPT_COMMON}" && exit 1 fi PROG=zfs.sh VERBOSE="no" UNLOAD="no" ZED_PIDFILE=${ZED_PIDFILE:-/var/run/zed.pid} LDMOD=${LDMOD:-/sbin/modprobe} KMOD_ZLIB_DEFLATE=${KMOD_ZLIB_DEFLATE:-zlib_deflate} KMOD_ZLIB_INFLATE=${KMOD_ZLIB_INFLATE:-zlib_inflate} KMOD_SPL=${KMOD_SPL:-spl} KMOD_SPLAT=${KMOD_SPLAT:-splat} KMOD_ZAVL=${KMOD_ZAVL:-zavl} KMOD_ZNVPAIR=${KMOD_ZNVPAIR:-znvpair} KMOD_ZUNICODE=${KMOD_ZUNICODE:-zunicode} KMOD_ZCOMMON=${KMOD_ZCOMMON:-zcommon} KMOD_ICP=${KMOD_ICP:-icp} KMOD_ZFS=${KMOD_ZFS:-zfs} usage() { cat << EOF USAGE: $0 [hvud] [module-options] DESCRIPTION: Load/unload the ZFS module stack. OPTIONS: -h Show this message -v Verbose -u Unload modules EOF } while getopts 'hvu' OPTION; do case $OPTION in h) usage exit 1 ;; v) VERBOSE="yes" ;; u) UNLOAD="yes" ;; ?) usage exit ;; esac done kill_zed() { if [ -f "$ZED_PIDFILE" ]; then PID=$(cat "$ZED_PIDFILE") kill "$PID" fi } check_modules() { local LOADED_MODULES="" local MISSING_MODULES="" for KMOD in $KMOD_SPL $KMOD_SPLAT $KMOD_ZAVL $KMOD_ZNVPAIR \ $KMOD_ZUNICODE $KMOD_ZCOMMON $KMOD_ICP $KMOD_ZFS; do NAME=$(basename "$KMOD" .ko) if lsmod | egrep -q "^${NAME}"; then LOADED_MODULES="$LOADED_MODULES\t$NAME\n" fi if ! modinfo "$KMOD" >/dev/null 2>&1; then MISSING_MODULES="$MISSING_MODULES\t${KMOD}\n" fi done if [ -n "$LOADED_MODULES" ]; then printf "Unload the kernel modules by running '%s -u':\n" "$PROG" printf "%b" "$LOADED_MODULES" exit 1 fi if [ -n "$MISSING_MODULES" ]; then printf "The following kernel modules can not be found:\n" printf "%b" "$MISSING_MODULES" exit 1 fi return 0 } load_module() { local KMOD=$1 FILE=$(modinfo "$KMOD" | awk '/^filename:/ {print $2}') VERSION=$(modinfo "$KMOD" | awk '/^version:/ {print $2}') if [ "$VERBOSE" = "yes" ]; then echo "Loading: $FILE ($VERSION)" fi $LDMOD "$KMOD" >/dev/null 2>&1 if [ $? -ne 0 ]; then echo "Failed to load $KMOD" return 1 fi return 0 } load_modules() { mkdir -p /etc/zfs modprobe "$KMOD_ZLIB_DEFLATE" >/dev/null modprobe "$KMOD_ZLIB_INFLATE" >/dev/null for KMOD in $KMOD_SPL $KMOD_SPLAT $KMOD_ZAVL $KMOD_ZNVPAIR \ $KMOD_ZUNICODE $KMOD_ZCOMMON $KMOD_ICP $KMOD_ZFS; do load_module "$KMOD" || return 1 done if [ "$VERBOSE" = "yes" ]; then echo "Successfully loaded ZFS module stack" fi return 0 } unload_module() { local KMOD=$1 NAME=$(basename "$KMOD" .ko) FILE=$(modinfo "$KMOD" | awk '/^filename:/ {print $2}') VERSION=$(modinfo "$KMOD" | awk '/^version:/ {print $2}') if [ "$VERBOSE" = "yes" ]; then echo "Unloading: $KMOD ($VERSION)" fi rmmod "$NAME" || echo "Failed to unload $NAME" return 0 } unload_modules() { for KMOD in $KMOD_ZFS $KMOD_ICP $KMOD_ZCOMMON $KMOD_ZUNICODE \ $KMOD_ZNVPAIR $KMOD_ZAVL $KMOD_SPLAT $KMOD_SPL; do NAME=$(basename "$KMOD" .ko) USE_COUNT=$(lsmod | egrep "^${NAME} " | awk '{print $3}') if [ "$USE_COUNT" = "0" ] ; then unload_module "$KMOD" || return 1 fi done if [ "$VERBOSE" = "yes" ]; then echo "Successfully unloaded ZFS module stack" fi return 0 } stack_clear() { local STACK_MAX_SIZE=/sys/kernel/debug/tracing/stack_max_size local STACK_TRACER_ENABLED=/proc/sys/kernel/stack_tracer_enabled if [ -e "$STACK_MAX_SIZE" ]; then echo 1 >"$STACK_TRACER_ENABLED" echo 0 >"$STACK_MAX_SIZE" fi } stack_check() { local STACK_MAX_SIZE=/sys/kernel/debug/tracing/stack_max_size local STACK_TRACE=/sys/kernel/debug/tracing/stack_trace local STACK_LIMIT=7600 if [ -e "$STACK_MAX_SIZE" ]; then STACK_SIZE=$(cat "$STACK_MAX_SIZE") if [ "$STACK_SIZE" -ge "$STACK_LIMIT" ]; then echo echo "Warning: max stack size $STACK_SIZE bytes" cat "$STACK_TRACE" fi fi } if [ "$(id -u)" != 0 ]; then echo "Must run as root" exit 1 fi if [ "$UNLOAD" = "yes" ]; then kill_zed umount -t zfs -a stack_check unload_modules else stack_clear check_modules load_modules "$@" udevadm trigger udevadm settle fi exit 0