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#!/bin/bash
#
# netfs         Mount network filesystems.
#
# Authors:	Bill Nottingham <notting@redhat.com>
#		AJ Lewis <alewis@redhat.com>
# 		Miquel van Smoorenburg, <miquels@drinkel.nl.mugnet.org>
#
# chkconfig: 345 25 75
# description: Mounts and unmounts all Network File System (NFS), \
#	       CIFS (Lan Manager/Windows), and NCP (NetWare) mount points.
### BEGIN INIT INFO
# Provides: $remote_fs
# Short-Description: Mount and unmount network filesystems.
# Description: Mount and unmount network filesystems.
### END INIT INFO

[ -f /etc/sysconfig/network ] || exit 0
. /etc/init.d/functions
. /etc/sysconfig/network

NFSFSTAB=$(LC_ALL=C awk '!/^#/ && $3 ~ /^nfs/ && $3 != "nfsd" && $4 !~ /noauto/ { print $2 }' /etc/fstab)
CIFSFSTAB=$(LC_ALL=C awk '!/^#/ && $3 == "cifs" && $4 !~ /noauto/ { print $2 }' /etc/fstab)
NCPFSTAB=$(LC_ALL=C awk '!/^#/ && $3 == "ncpfs" && $4 !~ /noauto/ { print $2 }' /etc/fstab)
GLUSTERFSFSTAB=$(LC_ALL=C awk '!/^#/ && $3 == "glusterfs" && $4 !~ /noauto/ { print $2 }' /etc/fstab)
NETDEVFSTAB=$(LC_ALL=C awk '!/^#/ && $4 ~/_netdev/ && $4 !~ /noauto/ { print $1 }' /etc/fstab)

NFSMTAB=$(LC_ALL=C awk '$3 ~ /^nfs/ && $3 != "nfsd" && $2 != "/" { print $2 }' /proc/mounts)
CIFSMTAB=$(LC_ALL=C awk '$3 == "cifs" { print $2 }' /proc/mounts)
NCPMTAB=$(LC_ALL=C awk '$3 == "ncpfs" { print $2 }' /proc/mounts)
GLUSTERFSMTAB=$(LC_ALL=C awk '$3 == "fuse.glusterfs" { print $2 }' /proc/mounts)
NETDEVMTAB=$(LC_ALL=C awk '$4 ~ /_netdev/ && $2 != "/" { print $2 }' /etc/mtab)

# See how we were called.
case "$1" in
  start)
        [ ! -f /var/lock/subsys/network ] && ! nm-online -x >/dev/null 2>&1 && exit 0
        [ "$EUID" != "0" ] && exit 4
        [ -n "$NFSFSTAB" ] && 
	  {
	    [ ! -f /var/lock/subsys/rpcbind ] && service rpcbind start
	    echo $"NFS filesystems queued to be mounted"
	  }
        [ -n "$CIFSFSTAB" ] && echo $"CIFS filesystems queued to be mounted"
        [ -n "$NCPFSTAB" ] && echo $"NCP filesystems queued to be mounted"
        [ -n "$GLUSTERFSFSTAB" ] && echo $"GLUSTERFS filesystems queued to be mounted"
        [ -n "$NETDEVFSTAB" ] &&
	  {
	    if [ -f /etc/mdadm.conf ] && [ -x /sbin/mdadm ]; then
		/sbin/mdadm -A -s
	    fi
	    if [ -f /etc/multipath.conf -a -x /sbin/multipath ]; then
	    	modprobe dm-multipath >/dev/null 2>&1
		/sbin/multipath -v 0
		if [ -x /sbin/kpartx ]; then
		       /sbin/dmsetup ls --target multipath --exec "/sbin/kpartx -a -p p"
		fi
	    fi
	    if [ -x /sbin/lvm ]; then
		if /sbin/lvm vgscan > /dev/null 2>&1 ; then
		       action $"Setting up Logical Volume Management:" /sbin/lvm vgchange -a ay --ignoreskippedcluster
		fi
	    fi

	    if [ -f /etc/crypttab ]; then
	        init_crypto 1
	    fi

	    STRING=$"Checking network-attached filesystems"
	    
	    echo $STRING
	    fsck -A -T -M -a -t opts=_netdev
	    rc=$?
	    
	    if [ "$rc" -eq "0" ]; then
	    	success "$STRING"
		echo
	    elif [ "$rc" -eq "1" ]; then
	        passed "$STRING"
	        echo
	    fi
	    
	    if [ "$rc" -gt 1 ]; then
		if [ -x /bin/plymouth ] && /bin/plymouth --ping ; then
			/bin/plymouth --hide-splash
		fi
		failure "$STRING"
		tty >/dev/null 2>&1 || exit 1
		echo
		echo
		echo $"*** An error occurred during the file system check."
		echo $"*** Dropping you to a shell; the system will reboot"
		echo $"*** when you leave the shell."
		
		str=$"(Repair filesystem)"
		PS1="$str \# # "; export PS1
		[ "$SELINUX" = "1" ] && disable_selinux
		sulogin
		
		shutdown -r now
	   fi
	  }
	touch /var/lock/subsys/netfs
	# The 'no' applies to all listed filesystem types. See mount(8).
	action $"Mounting filesystems: " mount -a -t nogfs2
	;;
  stop)
        # Unmount loopback stuff first
        [ "$EUID" != "0" ] && exit 4
	__umount_loopback_loop
  	if [ -n "$NETDEVMTAB" ]; then
		__umount_loop '$4 ~ /_netdev/ && $2 != "/" {print $2}' \
			/etc/mtab \
			$"Unmounting network block filesystems: " \
			$"Unmounting network block filesystems (retry): "
	fi
	if [ -n "$GLUSTERFSMTAB" ]; then
		__umount_loop '$3 ~ /^glusterfs/ {print $2}' \
			/etc/mtab \
			$"Unmounting GLUSTERFS filesystems: " \
			$"Unmounting GLUSTERFS filesystems (retry): "
	fi
  	if [ -n "$NFSMTAB" ]; then
		STRING=$"Unmounting NFS filesystems:"
		echo -n $STRING
		nfs_fs=$(LC_ALL=C awk '/^#/ {next} $3 ~ /^nfs/ && $3 != "nfsd" && $2 != "/" {print $2}' /proc/mounts | sort -r)
		if [ -n "$nfs_fs" ]; then
			# create a device id reference
			devs=$(stat -c "%d" $nfs_fs)

			# the lazy umount
			for fs in $nfs_fs ; do
				umount -l $fs
			done

			# find fds that don't start with /, are not sockets or pipes or other.
			# these are potentially detached fds
			detached_fds=$(find /proc/ -regex '/proc/[0-9]+/fd/.*' -printf "%p %l\n" 2>/dev/null |\
					 grep -Ev '/proc/[0-9]+/fd/[0-9]+ (/.*|inotify|\[.+\]|(socket|pipe):\[[0-9]+\])')

			# check each detached fd to see if it has the same device
			# as one of our lazy umounted filesystems
			kill_list=
			[ -n "$detached_fds" ] && while read fdline; do
				fd=${fdline%% *}
				pid=$(echo $fdline | sed -r 's/\/proc\/([0-9]+).+/\1/')
				fd_dev=$(stat -L -c "%d" $fd)
				for dev in $devs ; do
					[ "$dev" = "$fd_dev" ] && kill_list+="$pid "
				done
			done <<< "$detached_fds"

			[ -n "$kill_list" ] && kill $kill_list

			# run a little wait/check loop for procs to exit
			count=4
			while [ "$count" -gt 0 ] ; do
				[ -z "$kill_list" ] && break
				count=$(($count-1))
				usleep 500000
				remaining=
				for pid in $kill_list ; do
					[ -d "/proc/$pid" ] && remaining+="$pid "
				done
				kill_list=$remaining
			done

			# try to finish the job:
			if [ -n "$kill_list" ] ; then
				kill -9 $kill_list
				usleep 500000
				# last check
				remaining=
				for pid in $kill_list ; do
					[ -d "/proc/$pid" ] && remaining+="$pid "
				done
			fi
			[ -z "$remaining" ] && success "$STRING" || failure "$STRING"
			echo
		fi
	fi
	[ -n "$CIFSMTAB" ] && action $"Unmounting CIFS filesystems: " umount -a -t cifs
	[ -n "$NCPMTAB" ] && action $"Unmounting NCP filesystems: " umount -a -t ncp,ncpfs
	rm -f /var/lock/subsys/netfs
	;;
  status)
	if [ -f /proc/mounts ] ; then
	        [ -n "$NFSFSTAB" ] && {
		     echo $"Configured NFS mountpoints: "
		     for fs in $NFSFSTAB; do echo $fs ; done
		}
	        [ -n "$CIFSFSTAB" ] && {
		     echo $"Configured CIFS mountpoints: "
		     for fs in $CIFSFSTAB; do echo $fs ; done
		}
	        [ -n "$NCPFSTAB" ] && {
		     echo $"Configured NCP mountpoints: "
		     for fs in $NCPFSTAB; do echo $fs ; done
		}
		[ -n "$NETDEVFSTAB" ] && {
		      echo $"Configured network block devices: "
		      for fs in $NETDEVFSTAB; do echo $fs ; done
		}
		[ -n "$NFSMTAB" ] && {
                      echo $"Active NFS mountpoints: "
		      for fs in $NFSMTAB; do echo $fs ; done
		}
		[ -n "$CIFSMTAB" ] && {
                      echo $"Active CIFS mountpoints: "
		      for fs in $CIFSMTAB; do echo $fs ; done
		}
		[ -n "$NCPMTAB" ] && {
                      echo $"Active NCP mountpoints: "
		      for fs in $NCPMTAB; do echo $fs ; done
		}
		[ -n "$GLUSTERFSMTAB" ] && {
                      echo $"Active GLUSTERFS mountpoints: "
		      for fs in $GLUSTERFSMTAB; do echo $fs ; done
		}
		[ -n "$NETDEVMTAB" ] && {
		      echo $"Active network block devices: "
		      for fs in $NETDEVMTAB; do echo $fs ; done
		}
	else
		echo $"/proc filesystem unavailable"
	fi
	[ -r /var/lock/subsys/netfs ] || exit 3
	;;
  restart)
	$0 stop
	$0 start
	exit $?
	;;
  reload)
        $0 start
	exit $?
	;;
  *)
	echo $"Usage: $0 {start|stop|restart|reload|status}"
	exit 2
esac

exit 0