#!/sbin/sh
#
# CDDL HEADER START
#
# The contents of this file are subject to the terms of the
# Common Development and Distribution License, Version 1.0 only
# (the "License").  You may not use this file except in compliance
# with the License.
#
# You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
# or http://www.opensolaris.org/os/licensing.
# See the License for the specific language governing permissions
# and limitations under the License.
#
# When distributing Covered Code, include this CDDL HEADER in each
# file and include the License file at usr/src/OPENSOLARIS.LICENSE.
# If applicable, add the following below this CDDL HEADER, with the
# fields enclosed by brackets "[]" replaced with your own identifying
# information: Portions Copyright [yyyy] [name of copyright owner]
#
# CDDL HEADER END
#
#
# Copyright 2004 Sun Microsystems, Inc.  All rights reserved.
# Use is subject to license terms.
#
#ident	"%Z%%M%	%I%	%E% SMI"

. /lib/svc/share/fs_include.sh
. /lib/svc/share/net_include.sh

# Make sure that the essential libraries can be found.
LD_LIBRARY_PATH=/lib; export LD_LIBRARY_PATH
STMSBOOTUTIL=/lib/mpxio/stmsboot_util
FPCONF=/kernel/drv/fp.conf
SAVEDIR=/etc/mpxio
RECOVERFILE=$SAVEDIR/recover_instructions
DEVFSADM=/usr/sbin/devfsadm
METADEVADM=/usr/sbin/metadevadm
usrmounted=0

# map $special and $fsckdev
mpxio_mapdev()
{
	new_special=`$STMSBOOTUTIL -m $special`
	if [ $? -eq 0 ]; then
		special=$new_special
	fi

	new_fsckdev=`$STMSBOOTUTIL -m $fsckdev`
	if [ $? -eq 0 ]; then
		fsckdev=$new_fsckdev
	fi
}

mpxio_error()
{
	cecho "\nERROR: stmsboot: $1"
	#
	# display recovery instructions - the first call logs to the service
	# log and the second call displays on the console.
	#
	shcat $RECOVERFILE
	shcat $RECOVERFILE >/dev/msglog 2>&1
	cecho "These instructions were also logged to the file $RECOVERFILE\n"
}

#
# root ("/") is already mounted read only by the kernel.
# Remount the root read-write.
#
mpxio_mount_root()
{
	exec < $vfstab; readvfstab /
	mpxio_mapdev

	checkopt "llock" $mntopts
	mntopts='remount'
	[ -n "$otherops" ] && mntopts="${mntopts},${otherops}"
	/sbin/mount -m -F $fstype -o $mntopts $special $mountp \
>/dev/msglog 2>&1
}

#
# mount /usr read only
#
mpxio_mount_usr()
{
	exec < $vfstab; readvfstab "/usr"
	ret_val=0
	if [ -n "$mountp" ]; then
		mpxio_mapdev
		if [ "$fstype" = cachefs ]; then
			# Mount read-only without the cache.
			case "$mntopts" in
			*backfstype=nfs*)
				cfsbacktype=nfs
				;;
			*backfstype=hsfs*)
				cfsbacktype=hsfs
				;;
			*)
				cecho 'stmsboot: invalid vfstab entry for /usr'
				cfsbacktype=nfs
				;;
			esac
			# see the comment below for /dev/null
			/sbin/mount -m -F $cfsbacktype -o ro $special $mountp \
>/dev/null 2>&1
			ret_val=$?
		else
			#
			# Must use -o largefiles here to ensure the read-only
			# mount does not fail as a result of having a large
			# file present on /usr.
			#
			if [ "x$mntopts" = x- ]; then
				mntopts='ro,largefiles'
			else
				checkopt largefiles $mntopts
				if [ "x$option" != xlargefiles ]; then
					mntopts="largefiles,$mntopts"
				fi

				checkopt ro $mntopts
				if [ "x$option" != xro ]; then
					mntopts="ro,$mntopts"
				fi

				#
				# Requesting logging on a read-only mount
				# causes errors to be displayed, so remove
				# "logging" from the list of options.
				#

				checkopt logging $mntopts
				if [ "x$option" = xlogging ]; then
					mntopts="$otherops"
				fi
			fi

			#
			# In case of a manual restart of the service, mount
			# will emit messages if /usr is already mounted.
			# So redirect the output to /dev/null.
			#
			/sbin/mount -m -F $fstype -o $mntopts $special /usr \
>/dev/null 2>&1
			ret_val=$?
		fi
		if [ $ret_val -eq 0 ]; then
			usrmounted=1
		fi
	fi

	return $ret_val
}

# update system dump configuration
update_dumpconf()
{
	set -- `dumpadm -u 2>&1 | egrep 'cannot use /dev.* as dump device'`
	if [ "x$4" != x ]; then
		newname=`$STMSBOOTUTIL -M $4`
		if [ $? -eq 0 ]; then
			if dumpadm -d $newname > /dev/null; then
				cecho "stmsboot: dump configuration has been \
updated."
			else
				mpxio_error "failed to configure $newname as \
the dump device.\nold dump device name: $4"
				return 1
			fi
		fi
	fi
	return 0
}

#
# do the actual work
#
mpxio_main()
{
	#
	# NOTE: If the first attempt to run the service has failed due to an
	# expected error, users should be able to manually rerun the service.
	#
	# First mount /usr read only. This must be done to run
	# utilities such as fsck and devfsadm.
	# In the case of a manual rerun of the service, mounting of /usr here
	# fails if /usr already happens to be mounted. It is better that we
	# do not mount /usr if already mounted, but there seems to be no
	# apparent way to check whether /usr is mounted or not as we mount
	# /usr without making an entry into /etc/mnttab. So instead of
	# explicitly checking for mount failures, we just do a sanity check
	# by looking for some file (in this case devfsadm) in /usr.
	#
	mpxio_mount_usr
	if [ ! -s $DEVFSADM ]; then
		mpxio_error "failed to mount the /usr filesystem."
		return
	fi

	if mpxio_mount_root; then
		# create /dev links
		cecho "stmsboot: configuring devices"
		$DEVFSADM

		# update /etc/vfstab to reflect device name changes
		if $STMSBOOTUTIL -u >/dev/msglog 2>&1; then
			if update_dumpconf; then
				# update svm configuration to reflect new names
				if [ -s /kernel/drv/md.conf ] && \
				    [ -x $METADEVADM ]; then
					$METADEVADM -r >/dev/msglog 2>&1
				fi
			fi
		else
			mpxio_error "failed to update /etc/vfstab."
		fi

		/usr/sbin/svcadm disable platform/sun4u/mpxio-upgrade

		/usr/sbin/reboot
	else
		mpxio_error "failed to mount the root filesystem."
		if [ $usrmounted -eq 1 ]; then
			/sbin/umount /usr
		fi
	fi
}

mpxio_main