freebsd-nq/etc/init.d/zfs.redhat
Brian Behlendorf 2a005961a4 Ensure all block devices are available
These days most disk drivers will probe for devices asynchronously.
This means it's possible that when you zfs init script runs all the
required block devices may not yet have been discovered.  The result
is the pool may fail to cleanly import at boot time.  This is
particularly common when you have a large number of devices.

The fix is for the init script to block until udev settles and we
are no longer detecting new devices.  Once the system has settled
the zfs modules can be loaded and the pool with be automatically
imported.
2011-06-30 14:45:33 -07:00

170 lines
4.1 KiB
Bash

#!/bin/bash
#
# zfs This script will mount/umount the zfs filesystems.
#
# chkconfig: 2345 01 99
# description: This script will mount/umount the zfs filesystems during
# system boot/shutdown. Configuration of which filesystems
# should be mounted is handled by the zfs 'mountpoint' and
# 'canmount' properties. See the zfs(8) man page for details.
# It is also responsible for all userspace zfs services.
#
### BEGIN INIT INFO
# Provides: zfs
# Required-Start:
# Required-Stop:
# Should-Start:
# Should-Stop:
# Default-Start: 2 3 4 5
# Default-Stop: 1
# Short-Description: Mount/umount the zfs filesystems
# Description: ZFS is an advanced filesystem designed to simplify managing
# and protecting your data. This service mounts the ZFS
# filesystems and starts all related zfs services.
### END INIT INFO
export PATH=/usr/local/sbin:/usr/bin:/bin:/usr/local/sbin:/usr/sbin:/sbin
# Source function library & LSB routines
. /etc/rc.d/init.d/functions
# script variables
RETVAL=0
ZPOOL=zpool
ZFS=zfs
servicename=zfs
LOCKFILE=/var/lock/subsys/$servicename
# functions
zfs_installed() {
modinfo zfs > /dev/null 2>&1 || return 5
$ZPOOL > /dev/null 2>&1
[ $? == 127 ] && return 5
$ZFS > /dev/null 2>&1
[ $? == 127 ] && return 5
return 0
}
# i need a bash guru to simplify this, since this is copy and paste, but donno how
# to correctly dereference variable names in bash, or how to do this right
# first parameter is a regular expression that filters fstab
read_fstab() {
unset FSTAB
n=0
while read -r fs mntpnt fstype opts blah ; do
fs=`printf '%b\n' "$fs"`
FSTAB[$n]=$fs
let n++
done < <(egrep "$1" /etc/fstab)
}
start()
{
# Disable lockfile check
# if [ -f "$LOCKFILE" ] ; then return 0 ; fi
# check if ZFS is installed. If not, comply to FC standards and bail
zfs_installed || {
action $"Checking if ZFS is installed: not installed" /bin/false
return 5
}
# Requires selinux policy which has not been written.
if [ -r "/selinux/enforce" ] &&
[ "$(cat /selinux/enforce)" = "1" ]; then
action $"SELinux ZFS policy required: " /bin/false || return 6
fi
# Delay until all required block devices are present.
udevadm settle
# load kernel module infrastructure
if ! grep -q zfs /proc/modules ; then
action $"Loading kernel ZFS infrastructure: " modprobe zfs || return 5
fi
sleep 1
action $"Mounting automounted ZFS filesystems: " $ZFS mount -a || return 152
# Read fstab, try to mount zvols ignoring error
read_fstab "^/dev/(zd|zvol)"
template=$"Mounting volume %s registered in fstab: "
for volume in "${FSTAB[@]}" ; do
string=`printf "$template" "$volume"`
action "$string" mount "$volume" 2>/dev/null || /bin/true
done
# touch "$LOCKFILE"
}
stop()
{
# Disable lockfile check
# if [ ! -f "$LOCKFILE" ] ; then return 0 ; fi
# check if ZFS is installed. If not, comply to FC standards and bail
zfs_installed || {
action $"Checking if ZFS is installed: not installed" /bin/false
return 5
}
# the poweroff of the system takes care of this
# but it never unmounts the root filesystem itself
# shit
action $"Syncing ZFS filesystems: " sync
# about the only thing we can do, and then we
# hope that the umount process will succeed
# unfortunately the umount process does not dismount
# the root file system, there ought to be some way
# we can tell zfs to just flush anything in memory
# when a request to remount,ro comes in
#echo -n $"Unmounting ZFS filesystems: "
#$ZFS umount -a
#RETVAL=$?
#if [ $RETVAL -ne 0 ]; then
# failure
# return 8
#fi
#success
rm -f "$LOCKFILE"
}
# See how we are called
case "$1" in
start)
start
RETVAL=$?
;;
stop)
stop
RETVAL=$?
;;
status)
lsmod | grep -q zfs || RETVAL=3
$ZPOOL status && echo && $ZFS list || {
[ -f "$LOCKFILE" ] && RETVAL=2 || RETVAL=4
}
;;
restart)
stop
start
;;
condrestart)
if [ -f "$LOCKFILE" ] ; then
stop
start
fi
;;
*)
echo $"Usage: $0 {start|stop|status|restart|condrestart}"
RETVAL=3
;;
esac
exit $RETVAL