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|
#!/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 ${SCRIPT_COMMON}" && exit 1
fi
PROG=zfs.sh
VERBOSE="no"
UNLOAD="no"
STACK_TRACER="no"
ZED_PIDFILE=${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_ZAVL=${KMOD_ZAVL:-zavl}
KMOD_ZNVPAIR=${KMOD_ZNVPAIR:-znvpair}
KMOD_ZUNICODE=${KMOD_ZUNICODE:-zunicode}
KMOD_ZCOMMON=${KMOD_ZCOMMON:-zcommon}
KMOD_ZLUA=${KMOD_ZLUA:-zlua}
KMOD_ICP=${KMOD_ICP:-icp}
KMOD_ZFS=${KMOD_ZFS:-zfs}
usage() {
cat << EOF
USAGE:
$0 [hvudS] [module-options]
DESCRIPTION:
Load/unload the ZFS module stack.
OPTIONS:
-h Show this message
-v Verbose
-u Unload modules
-S Enable kernel stack tracer
EOF
}
while getopts 'hvuS' OPTION; do
case $OPTION in
h)
usage
exit 1
;;
v)
VERBOSE="yes"
;;
u)
UNLOAD="yes"
;;
S)
STACK_TRACER="yes"
;;
?)
usage
exit
;;
esac
done
kill_zed() {
if [ -f "$ZED_PIDFILE" ]; then
PID=$(cat "$ZED_PIDFILE")
kill "$PID"
fi
}
check_modules() {
LOADED_MODULES=""
MISSING_MODULES=""
for KMOD in $KMOD_SPL $KMOD_ZAVL $KMOD_ZNVPAIR \
$KMOD_ZUNICODE $KMOD_ZCOMMON $KMOD_ZLUA $KMOD_ICP $KMOD_ZFS; do
NAME=$(basename "$KMOD" .ko)
if lsmod | grep -E -q "^${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() {
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
# shellcheck disable=SC2181
if [ $? -ne 0 ]; then
echo "Failed to load $KMOD"
return 1
fi
return 0
}
load_modules() {
mkdir -p /etc/zfs
if modinfo "$KMOD_ZLIB_DEFLATE" >/dev/null 2>&1; then
modprobe "$KMOD_ZLIB_DEFLATE" >/dev/null 2>&1
fi
if modinfo "$KMOD_ZLIB_INFLATE">/dev/null 2>&1; then
modprobe "$KMOD_ZLIB_INFLATE" >/dev/null 2>&1
fi
for KMOD in $KMOD_SPL $KMOD_ZAVL $KMOD_ZNVPAIR \
$KMOD_ZUNICODE $KMOD_ZCOMMON $KMOD_ZLUA $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() {
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_ZLUA $KMOD_ZCOMMON $KMOD_ZUNICODE \
$KMOD_ZNVPAIR $KMOD_ZAVL $KMOD_SPL; do
NAME=$(basename "$KMOD" .ko)
USE_COUNT=$(lsmod | grep -E "^${NAME} " | awk '{print $3}')
if [ "$USE_COUNT" = "0" ] ; then
unload_module "$KMOD" || return 1
fi
done
if modinfo "$KMOD_ZLIB_DEFLATE" >/dev/null 2>&1; then
modprobe -r "$KMOD_ZLIB_DEFLATE" >/dev/null 2>&1
fi
if modinfo "$KMOD_ZLIB_INFLATE">/dev/null 2>&1; then
modprobe -r "$KMOD_ZLIB_INFLATE" >/dev/null 2>&1
fi
if [ "$VERBOSE" = "yes" ]; then
echo "Successfully unloaded ZFS module stack"
fi
return 0
}
stack_clear() {
STACK_MAX_SIZE=/sys/kernel/debug/tracing/stack_max_size
STACK_TRACER_ENABLED=/proc/sys/kernel/stack_tracer_enabled
if [ "$STACK_TRACER" = "yes" ] && [ -e "$STACK_MAX_SIZE" ]; then
echo 1 >"$STACK_TRACER_ENABLED"
echo 0 >"$STACK_MAX_SIZE"
fi
}
stack_check() {
STACK_MAX_SIZE=/sys/kernel/debug/tracing/stack_max_size
STACK_TRACE=/sys/kernel/debug/tracing/stack_trace
STACK_LIMIT=15362
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
|
