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-rw-r--r--etc/init.d/zfs-functions.in437
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diff --git a/etc/init.d/zfs-functions.in b/etc/init.d/zfs-functions.in
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+# This is a script with common functions etc used by zfs-import, zfs-mount,
+# zfs-share and zfs-zed.
+#
+# It is _NOT_ to be called independently
+#
+# Released under the 2-clause BSD license.
+#
+# The original script that acted as a template for this script came from
+# the Debian GNU/Linux kFreeBSD ZFS packages (which did not include a
+# licensing stansa) in the commit dated Mar 24, 2011:
+# https://github.com/zfsonlinux/pkg-zfs/commit/80a3ae582b59c0250d7912ba794dca9e669e605a
+
+PATH=/sbin:/bin:/usr/bin:/usr/sbin
+
+# Source function library
+if [ -f /lib/lsb/init-functions ]; then
+ # LSB, Debian GNU/Linux and derivates
+ . /lib/lsb/init-functions
+elif [ -f /etc/rc.d/init.d/functions ]; then
+ # RedHat and derivates
+ . /etc/rc.d/init.d/functions
+elif [ -L /etc/init.d/functions.sh ]; then
+ # Gentoo
+ . /etc/init.d/functions.sh
+fi
+
+# Of course the functions we need are called differently
+# on different distributions - it would be way too easy
+# otherwise!!
+if type log_failure_msg > /dev/null 2>&1 ; then
+ # LSB functions - fall through
+ zfs_log_begin_msg() { log_begin_msg "$1"; }
+ zfs_log_end_msg() { log_end_msg "$1"; }
+ zfs_log_failure_msg() { log_failure_msg "$1"; }
+ zfs_log_progress_msg() { log_progress_msg "$1"; }
+elif type success > /dev/null 2>&1 ; then
+ # Fedora/RedHat functions
+ zfs_set_ifs() {
+ # For some reason, the init function library have a problem
+ # with a changed IFS, so this function goes around that.
+ local tIFS="$1"
+ if [ -n "$tIFS" ]
+ then
+ TMP_IFS="$IFS"
+ IFS="$tIFS"
+ fi
+ }
+
+ zfs_log_begin_msg() { echo -n "$1 "; }
+ zfs_log_end_msg() {
+ zfs_set_ifs "$OLD_IFS"
+ if [ "$1" -eq 0 ]; then
+ success
+ else
+ failure
+ fi
+ echo
+ zfs_set_ifs "$TMP_IFS"
+ }
+ zfs_log_failure_msg() {
+ zfs_set_ifs "$OLD_IFS"
+ failure
+ echo
+ zfs_set_ifs "$TMP_IFS"
+ }
+ zfs_log_progress_msg() { echo -n $"$1"; }
+elif type einfo > /dev/null 2>&1 ; then
+ # Gentoo functions
+ zfs_log_begin_msg() { ebegin "$1"; }
+ zfs_log_end_msg() { eend "$1"; }
+ zfs_log_failure_msg() { eerror "$1"; }
+# zfs_log_progress_msg() { echo -n "$1"; }
+ zfs_log_progress_msg() { echo -n; }
+else
+ # Unknown - simple substitues.
+ zfs_log_begin_msg() { echo -n "$1"; }
+ zfs_log_end_msg() {
+ ret=$1
+ if [ "$ret" -ge 1 ]; then
+ echo " failed!"
+ else
+ echo " success"
+ fi
+ return "$ret"
+ }
+ zfs_log_failure_msg() { echo "$1"; }
+ zfs_log_progress_msg() { echo -n "$1"; }
+fi
+
+# Paths to what we need
+ZFS="@sbindir@/zfs"
+ZED="@sbindir@/zed"
+ZPOOL="@sbindir@/zpool"
+ZPOOL_CACHE="@sysconfdir@/zfs/zpool.cache"
+
+# Sensible defaults
+ZFS_MOUNT='yes'
+ZFS_UNMOUNT='yes'
+
+export ZFS ZED ZPOOL ZPOOL_CACHE ZFS_MOUNT ZFS_UNMOUNT
+
+# Source zfs configuration, overriding the defaults
+if [ -f @initconfdir@/zfs ]; then
+ . @initconfdir@/zfs
+fi
+
+# ----------------------------------------------------
+
+zfs_action()
+{
+ local MSG="$1"; shift
+ local CMD="$*"
+ local ret
+
+ zfs_log_begin_msg "$MSG "
+ $CMD
+ ret=$?
+ if [ "$ret" -eq 0 ]; then
+ zfs_log_end_msg $ret
+ else
+ zfs_log_failure_msg $ret
+ fi
+
+ return $ret
+}
+
+# Returns
+# 0 if daemon has been started
+# 1 if daemon was already running
+# 2 if daemon could not be started
+# 3 if unsupported
+#
+zfs_daemon_start()
+{
+ local PIDFILE="$1"; shift
+ local DAEMON_BIN="$1"; shift
+ local DAEMON_ARGS="$*"
+
+ if type start-stop-daemon > /dev/null 2>&1 ; then
+ # LSB functions
+ start-stop-daemon --start --quiet --pidfile "$PIDFILE" \
+ --exec "$DAEMON_BIN" --test > /dev/null || return 1
+
+ start-stop-daemon --start --quiet --exec "$DAEMON_BIN" -- \
+ $DAEMON_ARGS || return 2
+
+ # On Debian GNU/Linux, there's a 'sendsigs' script that will
+ # kill basically everything quite early and zed is stopped
+ # much later than that. We don't want zed to be among them,
+ # so add the zed pid to list of pids to ignore.
+ if [ -f "$PIDFILE" -a -d /run/sendsigs.omit.d ]
+ then
+ ln -s "$PIDFILE" /run/sendsigs.omit.d/zed
+ fi
+ elif type daemon > /dev/null 2>&1 ; then
+ # Fedora/RedHat functions
+ daemon --pidfile "$PIDFILE" "$DAEMON_BIN" $DAEMON_ARGS
+ return $?
+ else
+ # Unsupported
+ return 3
+ fi
+
+ return 0
+}
+
+# Returns
+# 0 if daemon has been stopped
+# 1 if daemon was already stopped
+# 2 if daemon could not be stopped
+# 3 if unsupported
+#
+zfs_daemon_stop()
+{
+ local PIDFILE="$1"
+ local DAEMON_BIN="$2"
+ local DAEMON_NAME="$3"
+
+ if type start-stop-daemon > /dev/null 2>&1 ; then
+ # LSB functions
+ start-stop-daemon --stop --quiet --retry=TERM/30/KILL/5 \
+ --pidfile "$PIDFILE" --name "$DAEMON_NAME"
+ [ "$?" = 0 ] && rm -f "$PIDFILE"
+
+ return $?
+ elif type killproc > /dev/null 2>&1 ; then
+ # Fedora/RedHat functions
+ killproc -p "$PIDFILE" "$DAEMON_NAME"
+ [ "$?" = 0 ] && rm -f "$PIDFILE"
+
+ return $?
+ else
+ # Unsupported
+ return 3
+ fi
+
+ return 0
+}
+
+# Returns status
+zfs_daemon_status()
+{
+ local PIDFILE="$1"
+ local DAEMON_BIN="$2"
+ local DAEMON_NAME="$3"
+
+ if type status_of_proc > /dev/null 2>&1 ; then
+ # LSB functions
+ status_of_proc "$DAEMON_NAME" "$DAEMON_BIN"
+ return $?
+ elif type status > /dev/null 2>&1 ; then
+ # Fedora/RedHat functions
+ status -p "$PIDFILE" "$DAEMON_NAME"
+ return $?
+ else
+ # Unsupported
+ return 3
+ fi
+
+ return 0
+}
+
+zfs_daemon_reload()
+{
+ local PIDFILE="$1"
+ local DAEMON_NAME="$2"
+
+ if type start-stop-daemon > /dev/null 2>&1 ; then
+ # LSB functions
+ start-stop-daemon --stop -signal 1 --quiet \
+ --pidfile "$PIDFILE" --name "$DAEMON_NAME"
+ return $?
+ elif type killproc > /dev/null 2>&1 ; then
+ # Fedora/RedHat functions
+ killproc -p "$PIDFILE" "$DAEMON_NAME" -HUP
+ return $?
+ else
+ # Unsupported
+ return 3
+ fi
+
+ return 0
+}
+
+zfs_installed()
+{
+ if [ ! -x "$ZPOOL" ]; then
+ return 1
+ else
+ # Test if it works (will catch missing/broken libs etc)
+ "$ZPOOL" -? > /dev/null 2>&1
+ return $?
+ fi
+
+ if [ ! -x "$ZFS" ]; then
+ return 2
+ else
+ # Test if it works (will catch missing/broken libs etc)
+ "$ZFS" -? > /dev/null 2>&1
+ return $?
+ fi
+
+ return 0
+}
+
+# Trigger udev and wait for it to settle.
+udev_trigger()
+{
+ if [ -x /sbin/udevadm ]; then
+ /sbin/udevadm trigger --action=change --subsystem-match=block
+ /sbin/udevadm settle
+ elif [ -x /sbin/udevsettle ]; then
+ /sbin/udevtrigger
+ /sbin/udevsettle
+ fi
+}
+
+# Do a lot of checks to make sure it's 'safe' to continue with the import.
+checksystem()
+{
+ if grep -qiE '(^|[^\\](\\\\)* )zfs=(off|no|0)( |$)' /proc/cmdline;
+ then
+ # Called with zfs=(off|no|0) - bail because we don't
+ # want anything import, mounted or shared.
+ # HOWEVER, only do this if we're called at the boot up
+ # (from init), not if we're running interactivly (as in
+ # from the shell - we know what we're doing).
+ [ -n "$init" ] && exit 3
+ fi
+
+ # Check if ZFS is installed.
+ zfs_installed || return 5
+
+ # Just make sure that /dev/zfs is created.
+ udev_trigger
+
+ if ! [ "$(uname -m)" = "x86_64" ]; then
+ echo "Warning: You're not running 64bit. Currently native zfs in";
+ echo " Linux is only supported and tested on 64bit.";
+ # should we break here? People doing this should know what they
+ # do, thus i'm not breaking here.
+ fi
+
+ return 0
+}
+
+reregister_mounts()
+{
+ local fs mntpnt fstype opts rest tmpdir
+ tmpdir=removethismountpointhoweverpossible
+
+ while read -r fs mntpnt fstype opts rest ; do
+ fs=$(printf '%b\n' "$fs")
+ mntpnt=$(printf '%b\n' "$mntpnt")
+ if [ "$fstype" = "zfs" ] ; then
+ if [ "$mntpnt" = "/" ] ; then
+ mount -f -o zfsutil -t zfs --move / /$tmpdir
+ umount --fake /$tmpdir
+ else
+ umount --fake "$mntpnt"
+ fi
+ elif echo "$fs" | grep -qE "^/dev/(zd|zvol)" ; then
+ if [ "$mntpnt" = "/" ] ; then
+ mount -f -t "$fstype" --move / /$tmpdir
+ umount --fake /$tmpdir
+ else
+ umount --fake "$mntpnt"
+ fi
+ fi
+ done < /proc/mounts
+
+ while read -r fs mntpnt fstype opts rest ; do
+ fs=$(printf '%b\n' "$fs")
+ mntpnt=$(printf '%b\n' "$mntpnt")
+ if [ "$fstype" = "zfs" ] ; then
+ mount -f -t zfs -o zfsutil "$fs" "$mntpnt"
+ elif echo "$fs" | grep -q "^/dev/zd" ; then
+ mount -f -t "$fstype" -o "$opts" "$fs" "$mntpnt"
+ fi
+ done < /proc/mounts
+}
+
+get_root_pool()
+{
+ set -- $(mount | grep ' on / ')
+ [ "$5" = "zfs" ] && echo "${1%%/*}"
+}
+
+check_module_loaded()
+{
+ [ -r /sys/module/zfs/version ] && return 0 || return 1
+}
+
+load_module()
+{
+ # Load the zfs module stack
+ if ! check_module_loaded; then
+ if ! modprobe zfs; then
+ return 5
+ fi
+ fi
+ return 0
+}
+
+# first parameter is a regular expression that filters mtab
+read_mtab()
+{
+ local match="$1"
+ local fs mntpnt fstype opts rest TMPFILE
+
+ # Unset all MTAB_* variables
+ unset $(env | grep ^MTAB_ | sed 's,=.*,,')
+
+ while read -r fs mntpnt fstype opts rest; do
+ if echo "$fs $mntpnt $fstype $opts" | grep -qE "$match"; then
+ mntpnt=$(printf '%b\n' "$mntpnt" | sed 's,/,_,g')
+ eval export MTAB_$mntpnt="$fs"
+ fi
+ done < /proc/mounts
+}
+
+in_mtab()
+{
+ local fs="$(echo "$1" | sed 's,/,_,g')"
+ local var
+
+ var="$(eval echo MTAB_$fs)"
+ [ "$(eval echo "$""$var")" != "" ]
+ return "$?"
+}
+
+# first parameter is a regular expression that filters fstab
+read_fstab()
+{
+ local match="$1"
+ local i var TMPFILE
+
+ # Unset all FSTAB_* variables
+ unset $(env | grep ^FSTAB_ | sed 's,=.*,,')
+
+ i=0
+ while read -r fs mntpnt fstype opts; do
+ echo "$fs" | egrep -qE '^#|^$' && continue
+
+ if echo "$fs $mntpnt $fstype $opts" | grep -qE "$match"; then
+ eval export FSTAB_dev_$i="$fs"
+ fs=$(printf '%b\n' "$fs" | sed 's,/,_,g')
+ eval export FSTAB_$i="$mntpnt"
+
+ i=$((i + 1))
+ fi
+ done < /etc/fstab
+}
+
+in_fstab()
+{
+ local var
+
+ var="$(eval echo FSTAB_$1)"
+ [ "${var}" != "" ]
+ return $?
+}
+
+is_mounted()
+{
+ local mntpt="$1"
+ local line
+
+ mount | \
+ while read line; do
+ if echo "$line" | grep -q " on $mntpt "; then
+ return 0
+ fi
+ done
+
+ return 1
+}