#! /bin/sh
# Copyright (c) 1996 - 2007 SuSE GmbH Nuernberg, Germany.  All rights reserved.
#
# Author: Florian La Roche <florian@suse.de>, 1996
#         Werner Fink <werner@suse.de>, 1996,98
#         Burchard Steinbild <bs@suse.de>, 1997
#         Thorsten Kukuk <kukuk@suse.de>, 2000,01
#
# /etc/init.d/nfsserver
#
### BEGIN INIT INFO
# Provides:       nfsserver
# Required-Start: $network $named $portmap
# Required-Stop:  $network $portmap
# Should-Start:   ypbind krb5kdc
# Should-Stop:    ypbind krb5kdc
# Default-Start:  3 5
# Default-Stop:   0 1 2 6
# Short-Description: Start the kernel based NFS daemon
### END INIT INFO

. /etc/sysconfig/nfs

# Shell functions sourced from /etc/rc.status:
#      rc_check         check and set local and overall rc status
#      rc_status        check and set local and overall rc status
#      rc_status -v     ditto but be verbose in local rc status
#      rc_status -v -r  ditto and clear the local rc status
#      rc_failed        set local and overall rc status to failed
#      rc_failed <num>  set local and overall rc status to <num><num>
#      rc_reset         clear local rc status (overall remains)
#      rc_exit          exit appropriate to overall rc status
. /etc/rc.status

# First reset status of this service
rc_reset

# Return values acc. to LSB for all commands but status:
# 0 - success
# 1 - generic or unspecified error
# 2 - invalid or excess argument(s)
# 3 - unimplemented feature (e.g. "reload")
# 4 - insufficient privilege
# 5 - program is not installed
# 6 - program is not configured
# 7 - program is not running
#
# Note that starting an already running service, stopping
# or restarting a not-running service as well as the restart
# with force-reload (in case signalling is not supported) are
# considered a success.

# XXX: there should be separate init scripts for these really
SVCGSSD_BIN=/usr/sbin/rpc.svcgssd
GSSD_BIN=/usr/sbin/rpc.gssd
IDMAPD_BIN=/usr/sbin/rpc.idmapd
NFSD_BIN=/usr/sbin/rpc.nfsd

IDMAPD_CLIENT_STATE=/run/nfs/nfs-rpc.idmapd
IDMAPD_SERVER_STATE=/run/nfs/nfsserver-rpc.idmapd
NFSD_BIND_MOUNTS=/run/nfs/bind.mounts
GSSD_CLIENT_STATE=/run/nfs/nfs-rpc.gssd
GSSD_SERVER_STATE=/run/nfs/nfsserver-rpc.gssd

NEED_SVCGSSD=no
NEED_IDMPAPD=no

case `uname -r` in
    0.*|1.*|2.0.*) exit 3
esac

case $NFS_SECURITY_GSS in
  [Nn]*)        flavors="";;
  [Yy]*)        flavors=krb5;;
  *)            flavors="$NFS_SECURITY_GSS";;
esac

if [ "$flavors" ]; then
    NEED_SVCGSSD=yes
fi

if [ "$NFS4_SUPPORT" = yes ]; then
    NEED_IDMAPD=yes
fi

if [ -z "$RPC_PIPEFS_DIR" ]; then
    RPC_PIPEFS_DIR=/var/lib/nfs/rpc_pipefs
fi

case "$NFS4_SERVER_MINOR_VERSION" in
    [0123456789] ) ;;
    * ) NFS4_SERVER_MINOR_VERSION=0
esac

check_for_nfsdfs() {
    HAVE_NFSDFS="no"
    while read dummy type ; do
	if [ "$type" = "nfsd" ] ; then
	    HAVE_NFSDFS="yes"
	fi
    done < /proc/filesystems
}

nfs4_bind_mounts() {
    [ -d /run/nfs ] || mkdir /run/nfs
    warned=no
    # In case of doubt, try "man sed" :-)
    cat /etc/exports |
	    sed -n 'H;g;s/\\$//;h;t;s/^\n//;s/\n[[:space:]]*//g;s/#.*//;p;s/.*//;h' |
	    sed 's/^\([^[:space:]]*\).*bind=\([^,)]*\).*/\1 \2/;t;d' |
	    sort |
	    while read export dir; do
		if [ $warned = no ] ; then
		    echo
		    echo "NFS: The usage of 'bind=' in /etc/exports is deprecated."
		    echo "NFS: Is it no longer needed and may cease to work."
		    echo "NFS: Please remove these settings."
		    warned=yes
		fi >&2
		test -d "$export" || mkdir -p "$export"
		mount -o bind "$dir" "$export"
		echo "$dir" "$export"
	    done > $NFSD_BIND_MOUNTS
}

nfs4_unbind_mounts() {
    sort -r -k2 $NFSD_BIND_MOUNTS |
	    while read src mountpoint crap; do
		[ -n "$mountpoint" ] && umount -l "$mountpoint"
	    done
    > $NFSD_BIND_MOUNTS
}

mount_rpc_pipefs() {

    # See if the file system is there yet
    case `stat -c "%t" -f "$RPC_PIPEFS_DIR"` in
    *67596969*)
        return 0;;
    esac

    mount -t rpc_pipefs rpc_pipefs "$RPC_PIPEFS_DIR"
}

umount_rpc_pipefs() {

    case `stat -c "%t" -f "$RPC_PIPEFS_DIR"` in
    *67596969*)
        umount "$RPC_PIPEFS_DIR";;
    esac
}

do_start_svcgssd() {
    for flavor in $flavors; do
        /sbin/modprobe rpcsec_gss_$flavor
    done

    mount_rpc_pipefs
    startproc $SVCGSSD_BIN $SVCGSSD_OPTIONS
    return $?
}

do_start_gssd() {
    if ! checkproc $GSSD_BIN; then
	case $NFS_GSSD_AVOID_DNS in
	    [Nn]*) ignore_dns=-D ;;
	    [Yy]*) ignore_dns=   ;;
	    *    ) ignore_dns=-D
	esac
	mount_rpc_pipefs
	startproc $GSSD_BIN $ignore_dns $GSSD_OPTIONS -p $RPC_PIPEFS_DIR
	return $?
    fi
}

do_start_idmapd() {
    mount_rpc_pipefs

    if checkproc $IDMAPD_BIN && test -f $IDMAPD_CLIENT_STATE; then
        killproc -HUP $IDMAPD_BIN
    else
        startproc $IDMAPD_BIN -p $RPC_PIPEFS_DIR
	return $?
    fi
}

case "$1" in
    start)
      PARAMS=3
      test "$USE_KERNEL_NFSD_NUMBER" -gt 0 && PARAMS="$USE_KERNEL_NFSD_NUMBER"

      echo -n "Starting kernel based NFS server:"
      modprobe nfsd

      # this can be removed when modprobe allows the sysctl to be
      # moved to modprobe.d without breaking --show-depends
      grep '^fs.nfs.n[sl]m' /etc/sysctl.conf | sysctl -q -e -n -p -

      # mount nfsd filesystem
      check_for_nfsdfs
      if [ "$HAVE_NFSDFS" = "yes" -a ! -f /proc/fs/nfsd/exports ] ; then
	mount -t nfsd nfsd /proc/fs/nfsd
	rc_status
      fi
      VERSION_PARAMS=
      if [ "$NFS3_SERVER_SUPPORT" == "no" ]; then
       VERSION_PARAMS="--no-nfs-version 2 --no-nfs-version 3"
      fi
      if [ "$NFS4_SUPPORT" != "yes" ]; then
       VERSION_PARAMS="--no-nfs-version 4"
      fi
      if [ "$NFS4_SERVER_MINOR_VERSION" != "0" ]; then
       VERSION_PARAMS="$VERSION_PARAMS --nfs-version 4 --nfs-version 4.$NFS4_SERVER_MINOR_VERSION"
      fi
      if [ -n "$NFSV4LEASETIME" -a -f /proc/fs/nfsd/nfsv4leasetime ]; then
        echo "$NFSV4LEASETIME" > /proc/fs/nfsd/nfsv4leasetime
      fi

      nfs4_bind_mounts
      # svcgssd; gssd; idmapd
      if [ "$NEED_SVCGSSD" = yes ]; then
          echo -n " svcgssd"
          do_start_svcgssd || {
              rc_status -v
              rc_exit
          }
          echo -n " gssd"
          do_start_gssd || {
              rc_status -v
              rc_exit
          }
	  echo $GSSD_BIN > $GSSD_SERVER_STATE
      fi
      if [ "$NEED_IDMAPD" = yes ]; then
          echo -n " idmapd"
          do_start_idmapd || {
              rc_status -v
              rc_exit
          }
	  [ -d /run/nfs ] || mkdir /run/nfs
	  echo $IDMAPD_BIN > $IDMAPD_SERVER_STATE
      fi
      # exportfs
      /usr/sbin/exportfs -r
      # rpc.mountd
      echo -n " mountd"
      if [ -n "$MOUNTD_PORT" ] ; then
	startproc /usr/sbin/rpc.mountd -p $MOUNTD_PORT $MOUNTD_OPTIONS $VERSION_PARAMS
      else
	startproc /usr/sbin/rpc.mountd $MOUNTD_OPTIONS $VERSION_PARAMS
      fi || {
          rc_status -v
          rc_exit
      }
      # rpc.statd
      if [ "$NFS3_SERVER_SUPPORT" != "no" ]; then
        echo -n " statd"
        startproc /usr/sbin/rpc.statd --no-notify $STATD_OPTIONS || {
          rc_status -v
          rc_exit
        }
      fi
      # rpc.nfsd
      echo -n " nfsd"
      $NFSD_BIN $NFSD_OPTIONS $PARAMS $VERSION_PARAMS || {
          rc_status -v
          rc_exit
      }
      # sm-notify needs to be run last
      echo -n " sm-notify"
      /usr/sbin/sm-notify $SM_NOTIFY_OPTIONS
      #
      rc_status -v
      ;;
    stop)
      echo -n "Shutting down kernel based NFS server:"
      # rpc.nfsd
      echo -n " nfsd"
      killproc -n -KILL nfsd || {
          rc_status -v
          rc_exit
      }
      # rpc.statd
      if ! checkproc -n lockd; then
	  echo -n " statd"
          killproc rpc.statd
      else
	  # tell lockd to drop all client locks
	  killproc -n -KILL lockd
      fi
      # make sure sm-notify is run on restart, as we have dropped some locks
      rm -f /run/sm-notify.pid
      #
      # rpc.mountd
      echo -n " mountd"
      killproc    -TERM /usr/sbin/rpc.mountd || {
          rc_status -v
          rc_exit
      }
      # svcgssd
      if [ "$NEED_SVCGSSD" = yes ]; then
          echo -n " svcgssd"
          killproc $SVCGSSD_BIN || {
              rc_status -v
              rc_exit
          }
	  # kill only if not needed by client anymore
	  if [ ! -f $GSSD_CLIENT_STATE ]; then
	      echo -n " gssd"
	      killproc $GSSD_BIN || {
		  rc_status -v
		  rc_exit
	      }
	  fi
	  rm -f $GSSD_SERVER_STATE
      fi
      # idmap
      if [ "$NEED_IDMAPD" = yes ]; then
	  # kill only if not needed by client anymore
	  if [ ! -f $IDMAPD_CLIENT_STATE ]; then
              echo -n " idmapd"
              killproc $IDMAPD_BIN
	  fi
	  rm -f $IDMAPD_SERVER_STATE
      fi
      # umount rpc_pipefs only if not needed by client
      if [ ! -f $GSSD_CLIENT_STATE -a ! -f $IDMAPD_CLIENT_STATE ] ; then
	  umount_rpc_pipefs
      fi
      # umount nfsd fs
      check_for_nfsdfs
      if [ "$HAVE_NFSDFS" = "yes" -a -f /proc/fs/nfsd/exports ] ; then
	  umount /proc/fs/nfsd
	  rc_status
      fi
      nfs4_unbind_mounts
      #
      rc_status -v
      ;;
    try-restart)
        ## Stop the service and if this succeeds (i.e. the
        ## service was running before), start it again.
        $0 status >/dev/null &&  $0 restart

        # Remember status and be quiet
        rc_status
        ;;
    restart)
        ## Stop the service and regardless of whether it was
        ## running or not, start it again.
        $0 stop
        $0 start

        # Remember status and be quiet
        rc_status
        ;;
    reload|force-reload)
	echo -n "Reload kernel based NFS server"
	# Unfortunately, there's no sane way of doing this:
        nfs4_unbind_mounts; nfs4_bind_mounts
	/usr/sbin/exportfs -r
	rc_status -v
	;;
    status)
        echo -n "Checking for kernel based NFS server:"
        ## Check status with checkproc(8), if process is running
        ## checkproc will return with exit status 0.

        # Status has a slightly different for the status command:
        # 0 - service running
        # 1 - service dead, but /run/  pid  file exists
        # 2 - service dead, but /var/lock/ lock file exists
        # 3 - service not running

        # NOTE: checkproc returns LSB compliant status values.
	if [ "$NEED_SVCGSSD" = yes ]; then
	    echo -n " svcgssd"
	    checkproc $SVCGSSD_BIN
	    rc_status -v
	    echo -n " gssd"
	    checkproc $GSSD_BIN
	    rc_status -v
	fi
	if [ "$NEED_IDMAPD" = yes ]; then
	    echo -n " idmapd"
	    checkproc $IDMAPD_BIN
	    rc_status -v
	fi
	echo -n " mountd"
        checkproc /usr/sbin/rpc.mountd
        rc_status -v
	echo -n " statd"
	checkproc /usr/sbin/rpc.statd
        rc_status -v
	echo -n " nfsd"
        checkproc -n nfsd
        rc_status -v

        ;;
    *)
	echo "Usage: $0 {start|stop|status|try-restart|restart|force-reload|reload}"
	exit 1
	;;
esac

rc_exit