Add support for the experimental nfs subsystem to the scripts in

/etc/rc.d. They use the following new rc variables:
  nfsv4_server_enable - set to "YES" to run the experimental server
  nfsuserd_enable - set to "YES" to run nfsuserd for NFSv4 client and
    server
  nfsuserd_flags - command line flags for nfsuserd
  nfscbd_enable - set to "YES" to run the experimental nfs client's
    NFSv4 callback daemon
  nfscbd_flags - command line flags for nfscbd

Reviewed by:	dougb
Approved by:	kib (mentor)

etc/defaults/rc.conf

@@ -315,6 +315,11 @@ rpcbind_flags=""		# Flags to rpcbind (if enabled).
 rpc_ypupdated_enable="NO"	# Run if NIS master and SecureRPC (or NO).
 keyserv_enable="NO"		# Run the SecureRPC keyserver (or NO).
 keyserv_flags=""		# Flags to keyserv (if enabled).
+nfsv4_server_enable="NO"	# Enable support for NFSv4
+nfscbd_enable="NO"		# NFSv4 client side callback daemon
+nfscbd_flags=""			# Flags for nfscbd
+nfsuserd_enable="NO"		# NFSv4 user/group name mapping daemon
+nfsuserd_flags=""		# Flags for nfsuserd
 
 ### Network Time Services options: ###
 timed_enable="NO"		# Run the time daemon (or NO).

etc/rc.d/Makefile

@@ -23,8 +23,8 @@ FILES=	DAEMON FILESYSTEMS LOGIN NETWORKING SERVERS \
 	mixer motd mountcritlocal mountcritremote mountlate \
 	mdconfig mdconfig2 mountd moused mroute6d mrouted msgs \
 	named natd netif netoptions \
-	network_ipv6 newsyslog nfsclient nfsd \
-	nfsserver nisdomain nsswitch ntpd ntpdate \
+	network_ipv6 newsyslog nfsclient nfscbd nfsd \
+	nfsserver nfsuserd nisdomain nsswitch ntpd ntpdate \
 	othermta \
 	pf pflog pfsync \
 	powerd power_profile ppp pppoed pwcheck \

etc/rc.d/mountd

@@ -37,6 +37,13 @@ mountd_precmd()
 		fi
 	fi
 
+	# If nfsv4_server_enable is yes, force use of the experimental
+	# server
+	#
+	if checkyesno nfsv4_server_enable; then
+		rc_flags="-e ${rc_flags}"
+	fi
+
 	if checkyesno zfs_enable; then
 		rc_flags="${rc_flags} /etc/exports /etc/zfs/exports"
 	fi

etc/rc.d/nfscbd

@@ -0,0 +1,19 @@
+#!/bin/sh
+#
+# $FreeBSD$
+#
+
+# PROVIDE: nfscbd
+# REQUIRE: NETWORKING nfsuserd
+# KEYWORD: nojail shutdown
+
+. /etc/rc.subr
+
+name="nfscbd"
+rcvar=`set_rcvar`
+command="/usr/sbin/${name}"
+sig_stop="USR1"
+
+load_rc_config $name
+
+run_rc_command "$1"

etc/rc.d/nfsd

@@ -4,7 +4,7 @@
 #
 
 # PROVIDE: nfsd
-# REQUIRE: mountd hostname gssd
+# REQUIRE: mountd hostname gssd nfsuserd
 # KEYWORD: nojail shutdown
 
 . /etc/rc.subr
@@ -14,14 +14,33 @@ rcvar=`set_rcvar nfs_server`
 command="/usr/sbin/${name}"
 
 load_rc_config $name
-command_args="${nfs_server_flags}"
 start_precmd="nfsd_precmd"
 sig_stop="USR1"
 
 nfsd_precmd()
 {
-	if ! sysctl vfs.nfsrv >/dev/null 2>&1; then
-		force_depend nfsserver || return 1
+	if checkyesno nfsv4_server_enable; then
+		# If nfsv4_server_enable is yes, force use
+		# of the experimental server
+		#
+		rc_flags="-e ${nfs_server_flags}"
+
+		if ! checkyesno nfsuserd_enable  && \
+		    ! /etc/rc.d/nfsuserd forcestatus 1>/dev/null 2>&1
+		then
+			force_depend nfsuserd || return 1
+		fi
+	else
+		rc_flags="${nfs_server_flags}"
+
+		if ! sysctl vfs.nfsrv >/dev/null 2>&1; then
+			force_depend nfsserver || return 1
+		fi
+
+		if checkyesno nfs_reserved_port_only; then
+			echo 'NFS on reserved port only=YES'
+			sysctl vfs.nfsrv.nfs_privport=1 > /dev/null
+		fi
 	fi
 
 	if ! checkyesno rpcbind_enable  && \
@@ -35,11 +54,6 @@ nfsd_precmd()
 	then
 		force_depend mountd || return 1
 	fi
-
-	if checkyesno nfs_reserved_port_only; then
-		echo 'NFS on reserved port only=YES'
-		sysctl vfs.nfsrv.nfs_privport=1 > /dev/null
-	fi
 	return 0
 }
 

etc/rc.d/nfsuserd

@@ -0,0 +1,19 @@
+#!/bin/sh
+#
+# $FreeBSD$
+#
+
+# PROVIDE: nfsuserd
+# REQUIRE: NETWORKING
+# KEYWORD: nojail shutdown
+
+. /etc/rc.subr
+
+name="nfsuserd"
+rcvar=`set_rcvar`
+command="/usr/sbin/${name}"
+sig_stop="USR1"
+
+load_rc_config $name
+
+run_rc_command "$1"