#!/usr/sbin/sh
#
# Copyright (c) 1992, 2014, Oracle and/or its affiliates. All rights reserved.
#
# Copyright (c) 1984, 1986, 1987, 1988, 1989 AT&T.
# All rights reserved.
#
#

. /lib/svc/share/smf_include.sh
. /lib/svc/share/fs_include.sh

# Mount other file systems to be available in single user mode.
# Currently, these are /var, /var/adm, /var/share and /tmp.  A change
# here will require a modification to the following programs (and
# documentation): /usr/sbin/mountall, /usr/sbin/umountall, and
# /lib/svc/bin/svc.startd.

#
# Once root is read/write we can enable the dedicated dumpdevice if it exists
# locally. This is an optimization as svc-dumpadm will attempt do this later.
# As the crash directory is generally under /var/share, we need to postpone
# the dump setup until /var/share is mounted.
#
dump_setup()
{
	[ -r /etc/dumpadm.conf ] && . /etc/dumpadm.conf

	readswapdev $DUMPADM_DEVICE < $vfstab

	#
	# If we have a dedicated dump device, then go ahead and configure it.
	#
	if [[ $special != $DUMPADM_DEVICE && -x /usr/sbin/dumpadm &&
	    -b $DUMPADM_DEVICE ]]; then
		/usr/sbin/dumpadm -u || exit $SMF_EXIT_ERR_CONFIG
	fi
}

#
# Write a unique id into this kernel image; this will be included
# in the dump header and panicbuf of any crashdump of this image.
#
if [[ -c /dev/dump && -x /usr/sbin/dumpadm ]]; then
	/usr/sbin/dumpadm -i
fi

#
# Add physical swap.  Needs to be done after dumpadm -i.
#
/usr/sbin/swapadd -1

rootiszfs=0

# In a zone, the zone root is mounted with a temporary mountpoint option
# (zfs mount -o mountpoint=<dir> <dataset>).  If the mountpoint of a child
# dataset is inherited, neither "zfs mount <dataset>" nor "zfs mount -a"
# will cause that child dataset to be mounted.  That is, the only way to
# mount such a child is with a temporary mountpoint option.  Thus, if the
# root (zone root, that is) file system is mounted with a temporary
# mountpoint option, we also need to mount other datasets in the BE
# using a temporary mountpoint.

rootistmpmnt=0
readmnttab / < /etc/mnttab
if [ "$fstype" = zfs ] ; then
	rootiszfs=1
	be=$special
	case "$mntopts" in
	*mountpoint=*)
		rootistmpmnt=1
		;;
	esac
fi

for fs in /var /var/adm /var/share /tmp; do
	readvfstab $fs < $vfstab
	if [ -n "$mountp" ]; then
		mounted $mountp $mntopts $fstype < /etc/mnttab && continue
		checkfs $fsckdev $fstype $mountp || exit $SMF_EXIT_ERR_FATAL
		mountfs -O $mountp $fstype $mntopts - ||
		    exit $SMF_EXIT_ERR_FATAL
		continue
	fi
	if [ "$rootiszfs" = 1 ]; then
		mounted $fs - zfs < /etc/mnttab && continue
		mountpt=`zfs get -H -o value mountpoint $be$fs 2>/dev/null`
		if [ $? = 0 ] ; then
			if [ "x$mountpt" = "x$fs" ] ; then
				opts=-O
				if [ $rootistmpmnt = 1 ]; then
					opts="$opts -o mountpoint=$mountpt"
				fi
				/usr/sbin/zfs mount $opts $be$fs
			fi
		fi
	fi
done

function ds_create_err {
	# We have not been able to create or mount the shared dataset
	# <rootpool>/VARSHARE/zones.
	# This is severe enough to cause us to exit with an error.
	print ""
	print "Unable to create dataset $fsname or mount it on /system/zones."
	print "/usr/sbin/zfs create -o mountpoint=/system/zones/ $1"
	print ""
	exit $SMF_EXIT_ERR_FATAL
}

function varshare_create_err {
	# We have not been able to create or mount the shared dataset, passed as
	# the first argument, and have not migrated contents from /var/.migrate.
	# This is severe enough to cause us to exit with an error.
	print ""
	print "Unable to create dataset $fsname or mount it on /var/share."
	print "Please move any existing content from /var/share to "
	print "/var/.migrate, ensure that /var/share is an empty directory,"
	print "then run the following commands:"
	print "/usr/sbin/zfs create -o canmount=noauto -o mountpoint=/var/share $1"
	print "/usr/sbin/zfs mount $1"
	print "/lib/svc/share/migrate_shared_files.py /var/.migrate /var/share $SMF_FMRI"
	print ""
	exit $SMF_EXIT_ERR_FATAL
}

if [ "$rootiszfs" = 1 ] ; then
	/usr/sbin/zfs list -rH -o mountpoint -s mountpoint -t filesystem \
	    "$be" 2> /dev/null | \
	    while read mountp ; do
		if [ "x$mountp" != "x" -a "$mountp" != "legacy" ] ; then
			mounted $mountp - zfs < /etc/mnttab  && continue
			opts=
			if [ $rootistmpmnt = 1 ]; then
				opts="$opts -o mountpoint=$mountp"
			fi
			/usr/sbin/zfs mount $opts $be$mountp
		fi
	done

	rpool=${be%%/*}
	/usr/sbin/zfs list -Ho mountpoint "$rpool/VARSHARE" > /dev/null 2>&1 &&
	    /usr/sbin/zfs mount "$rpool/VARSHARE" 2> /dev/null

	# For directories under /var that we wish to share across boot
	# environments, we must ensure that our shared dataset exists, then
	# must migrate any salvaged files and directories over to that dataset.
	if ! mounted /var/share - zfs < /etc/mnttab ; then
		fsname="$rpool/VARSHARE"
		compression=""
		if mounted /var - zfs < /etc/mnttab ; then
			compression=`zfs get -H -o value compression $be/var`
			if [ $? = 0 ]; then
				compression="-o compression=$compression"
			fi
		fi
		/usr/sbin/zfs create -o canmount=noauto \
		    -o mountpoint=/var/share $compression $fsname
		if [ $? != 0 ] ; then
			varshare_create_err $fsname
		fi
		/usr/sbin/zfs mount $fsname
		if [ $? != 0 ] ; then
			varshare_create_err $fsname
		fi
	fi
	if is_self_assembly_boot; then
		/lib/svc/share/migrate_shared_files.py /var/.migrate \
		    /var/share $SMF_FMRI > /dev/console
		if [ $? != 0 ] ; then
			exit $SMF_EXIT_ERR_FATAL
		fi
	fi

	dump_setup

	#
	# Create rpool/VARSHARE/zones and mount it at /system/zones in the
	# global zone.
	#
	if smf_is_globalzone &&
	    ! mounted /system/zones - zfs < /etc/mnttab; then
		fsname="$rpool/VARSHARE/zones"
		if ! /usr/sbin/zfs list $fsname > /dev/null 2>&1 &&
		    ! /usr/sbin/zfs create -o mountpoint=/system/zones \
		    $fsname; then
			ds_create_err $fsname
		fi
	fi
fi

mount_shared

# Updating the last boot time property if booted r/w
if [[ -w / ]]; then
	rootfs=$(/usr/sbin/zfs list -Ho name / 2>/dev/null)
	if [[ -n $rootfs ]]; then
		# Set Boot Timestamp
		now=$(TZ=UTC date +%Y%m%dT%H%M%SZ)
		/usr/sbin/zfs set com.oracle.libbe:last-boot-time="$now" \
		    "$rootfs"
	fi
fi

exit $SMF_EXIT_OK