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|
#!/bin/sh
#
# A simple script to load/unload the ZFS module stack.
#
BASE_DIR=${0%/*}
SCRIPT_COMMON=common.sh
if [ -f "${BASE_DIR}/${SCRIPT_COMMON}" ]; then
. "${BASE_DIR}/${SCRIPT_COMMON}"
else
echo "Missing helper script ${SCRIPT_COMMON}" && exit 1
fi
VERBOSE="no"
UNLOAD="no"
LOAD="yes"
STACK_TRACER="no"
ZED_PIDFILE=${ZED_PIDFILE:-/var/run/zed.pid}
LDMOD=${LDMOD:-/sbin/modprobe}
DELMOD=${DELMOD:-/sbin/rmmod}
KMOD_ZLIB_DEFLATE=${KMOD_ZLIB_DEFLATE:-zlib_deflate}
KMOD_ZLIB_INFLATE=${KMOD_ZLIB_INFLATE:-zlib_inflate}
KMOD_SPL=${KMOD_SPL:-spl}
KMOD_ZFS=${KMOD_ZFS:-zfs}
KMOD_FREEBSD=${KMOD_FREEBSD:-openzfs}
usage() {
cat << EOF
USAGE:
$0 [hvudS]
DESCRIPTION:
Load/unload the ZFS module stack.
OPTIONS:
-h Show this message
-v Verbose
-r Reload modules
-u Unload modules
-S Enable kernel stack tracer
EOF
exit 1
}
while getopts 'hvruS' OPTION; do
case $OPTION in
v)
VERBOSE="yes"
;;
r)
UNLOAD="yes"
LOAD="yes"
;;
u)
UNLOAD="yes"
LOAD="no"
;;
S)
STACK_TRACER="yes"
;;
*)
usage
;;
esac
done
shift $(( OPTIND - 1 ))
[ $# -eq 0 ] || usage
kill_zed() {
if [ -f "$ZED_PIDFILE" ]; then
read -r PID <"$ZED_PIDFILE"
kill "$PID"
fi
}
check_modules_linux() {
LOADED_MODULES=""
MISSING_MODULES=""
for KMOD in $KMOD_SPL $KMOD_ZFS; do
NAME="${KMOD##*/}"
NAME="${NAME%.ko}"
if lsmod | grep -E -q "^${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" "$0"
printf "%b" "$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_linux() {
KMOD=$1
FILE=$(modinfo "$KMOD" 2>&1 | awk 'NR == 1 && /zlib/ && /not found/ {print "(builtin)"; exit} /^filename:/ {print $2}')
[ "$FILE" = "(builtin)" ] && return
if [ "$VERBOSE" = "yes" ]; then
VERSION=$(modinfo "$KMOD" | awk '/^version:/ {print $2}')
echo "Loading: $FILE ($VERSION)"
fi
if ! $LDMOD "$KMOD" >/dev/null 2>&1; then
echo "Failed to load $KMOD"
return 1
fi
return 0
}
load_modules_freebsd() {
kldload "$KMOD_FREEBSD" || return 1
if [ "$VERBOSE" = "yes" ]; then
echo "Successfully loaded ZFS module stack"
fi
return 0
}
load_modules_linux() {
mkdir -p /etc/zfs
for KMOD in "$KMOD_ZLIB_DEFLATE" "$KMOD_ZLIB_INFLATE" $KMOD_SPL $KMOD_ZFS; do
load_module_linux "$KMOD" || return 1
done
if [ "$VERBOSE" = "yes" ]; then
echo "Successfully loaded ZFS module stack"
fi
return 0
}
unload_modules_freebsd() {
kldunload "$KMOD_FREEBSD" || echo "Failed to unload $KMOD_FREEBSD"
if [ "$VERBOSE" = "yes" ]; then
echo "Successfully unloaded ZFS module stack"
fi
return 0
}
unload_modules_linux() {
legacy_kmods="icp zzstd zlua zcommon zunicode znvpair zavl"
for KMOD in "$KMOD_ZFS" $legacy_kmods "$KMOD_SPL"; do
NAME="${KMOD##*/}"
NAME="${NAME%.ko}"
! [ -d "/sys/module/$NAME" ] || $DELMOD "$NAME" || return
done
if [ "$VERBOSE" = "yes" ]; then
echo "Successfully unloaded ZFS module stack"
fi
}
stack_clear_linux() {
STACK_MAX_SIZE=/sys/kernel/debug/tracing/stack_max_size
STACK_TRACER_ENABLED=/proc/sys/kernel/stack_tracer_enabled
if [ "$STACK_TRACER" = "yes" ] && [ -e "$STACK_MAX_SIZE" ]; then
echo 1 >"$STACK_TRACER_ENABLED"
echo 0 >"$STACK_MAX_SIZE"
fi
}
stack_check_linux() {
STACK_MAX_SIZE=/sys/kernel/debug/tracing/stack_max_size
STACK_TRACE=/sys/kernel/debug/tracing/stack_trace
STACK_LIMIT=15362
if [ -e "$STACK_MAX_SIZE" ]; then
read -r STACK_SIZE <"$STACK_MAX_SIZE"
if [ "$STACK_SIZE" -ge "$STACK_LIMIT" ]; then
echo
echo "Warning: max stack size $STACK_SIZE bytes"
cat "$STACK_TRACE"
fi
fi
}
if [ "$(id -u)" != 0 ]; then
echo "Must run as root"
exit 1
fi
UNAME=$(uname)
if [ "$UNLOAD" = "yes" ]; then
kill_zed
umount -t zfs -a
case $UNAME in
FreeBSD)
unload_modules_freebsd
;;
Linux)
stack_check_linux
unload_modules_linux
;;
*)
echo "unknown system: $UNAME" >&2
exit 1
;;
esac
fi
if [ "$LOAD" = "yes" ]; then
case $UNAME in
FreeBSD)
load_modules_freebsd
;;
Linux)
stack_clear_linux
check_modules_linux
load_modules_linux
udevadm trigger
udevadm settle
;;
*)
echo "unknown system: $UNAME" >&2
exit 1
;;
esac
fi
exit 0
|
