Add support for EtherChannel configuration to rc startup scripts.

Note: This also deprecates "NO" as a way to specify an empty list of
interfaces for gif_interfaces.

PR:		conf/104884
Submitted by:	nork
Harassed by:	brd
Discussed with:	brooks, dougb

etc/defaults/rc.conf

@@ -178,11 +178,15 @@ ifconfig_lo0="inet 127.0.0.1"	# default loopback device configuration.
 sppp_interfaces=""		# List of sppp interfaces.
 #sppp_interfaces="isp0"		# example: sppp over ISDN
 #spppconfig_isp0="authproto=chap myauthname=foo myauthsecret='top secret' hisauthname=some-gw hisauthsecret='another secret'"
-gif_interfaces="NO"		# List of GIF tunnels (or "NO").
+gif_interfaces=""		# List of GIF tunnels.
 #gif_interfaces="gif0 gif1"	# Examples typically for a router.
 				# Choose correct tunnel addrs.
 #gifconfig_gif0="10.1.1.1 10.1.2.1"	# Examples typically for a router.
 #gifconfig_gif1="10.1.1.2 10.1.2.2"	# Examples typically for a router.
+fec_interfaces=""		# List of Fast EtherChannels.
+#fec_interfaces="fec0 fec1"
+#fecconfig_fec0="fxp0 dc0"	# Examples typically for two NICs
+#fecconfig_fec1="em0 em1 bge0 bge1"	# Examples typically for four NICs
 
 # User ppp configuration.
 ppp_enable="NO"		# Start user-ppp (or NO).

etc/network.subr

@@ -455,26 +455,89 @@ clone_down()
 	debug "Destroyed clones: ${_list}"
 }
 
+# Create netgraph nodes.
+#
+ng_mkpeer() {
+	ngctl -f - 2> /dev/null <<EOF
+mkpeer $*
+msg dummy nodeinfo
+EOF
+}
+
+ng_create_one() {
+	ng_mkpeer $* | while read line; do
+		t=`expr "${line}" : '.* name="\([a-z]*[0-9]*\)" .*'`
+		if [ -n "${t}" ]; then
+			echo ${t}
+			return
+		fi
+	done
+}
+
 gif_up() {
+	# The following must be removed once RELENG_7 is branched.
 	case ${gif_interfaces} in
-	[Nn][Oo] | '')
+	[Nn][Oo])
+		warn "gif_interfaces=\"NO\" is deprecated, use gif_interfaces=\"\" instead."
+		gif_interfaces=""
 		;;
-	*)
-		for i in ${gif_interfaces}; do
-			peers=`get_if_var $i gifconfig_IF`
-			case ${peers} in
+	esac
+
+	for i in ${gif_interfaces}; do
+		peers=`get_if_var $i gifconfig_IF`
+		case ${peers} in
+		'')
+			continue
+			;;
+		*)
+			ifconfig $i create >/dev/null 2>&1
+			ifconfig $i tunnel ${peers}
+			ifconfig $i up
+			;;
+		esac
+	done
+}
+
+# ng_fec_create ifn
+# Configure Fast EtherChannel for interface $ifn. Returns 0 if FEC
+# arguments were found and configured; returns !0 otherwise.
+ng_fec_create() {
+	 local req_iface iface bogus
+	 req_iface="$1"
+
+	 ngctl shutdown ${req_iface}: > /dev/null 2>&1
+
+	 bogus=""
+	 while true; do
+		 iface=`ng_create_one fec dummy fec`
+		 if [ -z "${iface}" ]; then
+			 exit 2
+		 fi
+		 if [ "${iface}" = "${req_iface}" ]; then
+			 break
+		 fi
+		 bogus="${bogus} ${iface}"
+	 done
+
+	 for iface in ${bogus}; do
+		 ngctl shutdown ${iface}:
+	 done
+}
+
+fec_up() {
+	for i in ${fec_interfaces}; do
+		ng_fec_create $i
+		for j in `get_if_var $i fecconfig_IF`; do
+			case ${j} in
 			'')
 				continue
 				;;
 			*)
-				ifconfig $i create >/dev/null 2>&1
-				ifconfig $i tunnel ${peers}
-				ifconfig $i up
+				ngctl msg ${i}: add_iface "\"${j}\""
 				;;
 			esac
 		done
-		;;
-	esac
+	done
 }
 
 #

etc/rc.d/netif

@@ -57,6 +57,9 @@ network_start()
 		# Create cloned interfaces
 		clone_up
 
+		# Create Fast EtherChannel interfaces
+		fec_up
+
 		# Create IPv6<-->IPv4 tunnels
 		gif_up
 

share/man/man5/rc.conf.5

@@ -24,7 +24,7 @@
 .\"
 .\" $FreeBSD$
 .\"
-.Dd January 23, 2007
+.Dd February 9, 2007
 .Dt RC.CONF 5
 .Os
 .Sh NAME
@@ -1163,6 +1163,33 @@ Entries in
 are automatically appended to
 .Va network_interfaces
 for configuration.
+.It Va fec_interfaces
+.Pq Vt str
+Set to the list of
+.Xr ng_fec 4
+Fast EtherChannel interfaces to configure on this host.
+A
+.Va fecconfig_ Ns Aq Ar interface
+variable is assumed to exist for each value of
+.Ar interface .
+The value of this variable is used to configure link aggregated interfaces
+according to the syntax of the
+.Cm NGM_FEC_ADD_IFACE
+to
+.Xr ngctl 8 
+msg.
+Additionally, this option ensures that each listed interface is created
+via the
+.Cm mkpeer
+command to
+.Xr ngctl 8
+before attempting to configure it.
+For example:
+.Bd -literal
+fec_interfaces="fec0"
+fecconfig_fec0="em0 em1"
+ifconfig_fec0="DHCP"
+.Ed
 .It Va gif_interfaces
 .Pq Vt str
 Set to the list of