1 files changed, 223 insertions, 0 deletions
diff --git a/net/bonding.sh b/net/bonding.sh
new file mode 100644
index 0000000..fb00825
--- /dev/null
+++ b/net/bonding.sh
@@ -0,0 +1,223 @@
+# Copyright (c) 2007-2008 Roy Marples <roy@marples.name>
+# Released under the 2-clause BSD license.
+
+bonding_depend()
+{
+	before interface macchanger
+	program /sbin/ifconfig /bin/ifconfig
+	# If you do not have sysfs, you MUST have this binary instead for ioctl
+	# Also you will loose some functionality that cannot be done via sysfs:
+	if [ ! -d /sys/class/net ]; then
+		program /sbin/ifenslave
+	fi
+}
+
+_config_vars="$_config_vars slaves"
+
+_is_bond()
+{
+	[ -f "/proc/net/bonding/${IFACE}" ]
+}
+
+bonding_pre_start()
+{
+	local x= s= n= slaves= primary=
+
+	slaves="$(_get_array "slaves_${IFVAR}")"
+	unset slaves_${IFVAR}
+
+	eval primary="\$primary_${IFVAR}"
+	unset primary_${IFVAR}
+
+	eval subsume="\$subsume_${IFVAR}"
+	unset subsume_${IFVAR}
+
+
+	[ -z "${slaves}" ] && return 0
+
+	# Load the kernel module if required
+	if [ ! -d /proc/net/bonding ]; then
+		if ! modprobe bonding; then
+			eerror "Cannot load the bonding module"
+			return 1
+		fi
+	fi
+
+	if [ ! -d /sys/class/net ]; then
+		ewarn "sysfs is not available! You will be unable to create new bonds, or change dynamic parameters!"
+	fi
+
+	# We can create the interface name we like now, but this
+	# requires sysfs
+	if ! _exists && [ -d /sys/class/net ]; then
+		echo "+${IFACE}" > /sys/class/net/bonding_masters
+	fi
+	_exists true || return 1
+
+	if ! _is_bond; then
+		eerror "${IFACE} is not capable of bonding"
+		return 1
+	fi
+
+	# Interface must be down in order to configure
+	_down
+
+	# Configure the bond mode & link monitoring, then we can reloop to ensure
+	# we configure all other options
+	# mode needs to be done before all other options.
+	# miimon needs to be done BEFORE downdelay
+	[ -d /sys/class/net ] && for n in mode miimon; do
+		x=/sys/class/net/"${IFACE}"/bonding/$n
+		[ -f "${x}" ] || continue
+		eval s=\$${n}_${IFVAR}
+		if [ -n "${s}" ]; then
+			einfo "Setting ${n}: ${s}"
+			echo "${s}" >"${x}" || \
+			eerror "Failed to configure $n (${n}_${IFVAR})"
+		fi
+	done
+	# Nice and dynamic for remaining options:)
+	[ -d /sys/class/net ] && for x in /sys/class/net/"${IFACE}"/bonding/*; do
+		[ -f "${x}" ] || continue
+		n=${x##*/}
+		eval s=\$${n}_${IFVAR}
+		# skip mode and miimon
+		[ "${n}" == "mode" -o "${n}" == "miimon" ] && continue
+		if [ -n "${s}" ]; then
+			einfo "Setting ${n}: ${s}"
+			echo "${s}" >"${x}" || \
+			eerror "Failed to configure $n (${n}_${IFVAR})"
+		fi
+	done
+
+	ebegin "Adding slaves to ${IFACE}"
+	eindent
+	einfo "${slaves}"
+
+	# Check that our slaves exist
+	(
+	for IFACE in ${slaves}; do
+		_exists true || return 1
+	done
+
+	# Unless we are subsuming an existing interface (NFS root), we down
+	# slave interfaces to work around bugs supposedly in some chipsets
+	# that cause failure to enslave from other states.
+	if [ -z "${subsume}" ]; then
+		for IFACE in ${slaves}; do
+			_delete_addresses
+			_down
+		done
+	fi
+	)
+
+	# Now force the master to up
+	#  - First test for interface subsume request (required for NFS root)
+	if [ -n "${subsume}" ]; then
+		einfo "Subsuming ${subsume} interface characteristics."
+		eindent
+		local oiface=${IFACE}
+		IFACE=${subsume}
+		local addr="$(_get_inet_address)"
+		einfo "address: ${addr}"
+		IFACE=${oiface}
+		unset oiface
+		eoutdent
+		# subsume (presumably kernel auto-)configured IP
+		ifconfig ${IFACE} ${addr} up
+	else
+		# warn if root on nfs and no subsume interface supplied
+		local root_fs_type=$(mountinfo -s /)
+		if [ "${root_fs_type}" = "nfs" ]; then
+			warn_nfs=1
+			ewarn "NFS root detected!!!"
+			ewarn " If your system crashes here, /etc/conf.d/net needs"
+			ewarn " subsume_${IFACE}=\"<iface>\" ... where <iface> is the"
+			ewarn " existing, (usually kernel auto-)configured interface."
+		fi
+		# up the interface
+		_up
+    fi
+
+	# finally add in slaves
+	# things needed in the process, and if they are done by ifenslave, openrc, and/or the kernel.
+	# down new slave interface: ifenslave, openrc
+	# set mtu: ifenslave, kernel
+	# set slave MAC: ifenslave, kernel
+	eoutdent
+	if [ -d /sys/class/net ]; then
+		sys_bonding_path=/sys/class/net/"${IFACE}"/bonding
+		local oiface
+		oiface=$IFACE
+		if [ -n "${primary}" ]; then
+			IFACE=$primary
+			_down
+			IFACE=$oiface
+			echo "+${primary}" >$sys_bonding_path/slaves
+			echo "${primary}" >$sys_bonding_path/primary
+		fi
+		for s in ${slaves}; do
+			[ "${s}" = "${primary}" ] && continue
+			if ! grep -q ${s} $sys_bonding_path/slaves; then
+				IFACE=$s
+				_down
+				IFACE=$oiface
+				echo "+${s}" >$sys_bonding_path/slaves
+			fi
+		done
+	else
+		ifenslave "${IFACE}" ${slaves} >/dev/null
+	fi
+	eend $?
+
+	return 0 #important
+}
+
+bonding_stop()
+{
+	_is_bond || return 0
+
+	# Wipe subsumed interface
+	if [ -n "${subsume}" ]; then
+		ifconfig ${subsume} 0.0.0.0
+	fi
+
+	local slaves= s=
+	slaves=$( \
+		sed -n -e 's/^Slave Interface: //p' "/proc/net/bonding/${IFACE}" \
+		| tr '\n' ' ' \
+	)
+	[ -z "${slaves}" ] && return 0
+
+	# remove all slaves
+	ebegin "Removing slaves from ${IFACE}"
+	eindent
+	einfo "${slaves}"
+	eoutdent
+	if [ -d /sys/class/net ]; then
+		for s in ${slaves}; do
+			echo -"${s}" > /sys/class/net/"${IFACE}"/bonding/slaves
+		done
+	else
+		ifenslave -d "${IFACE}" ${slaves}
+	fi
+
+	# reset all slaves
+	(
+	for IFACE in ${slaves}; do
+		if _exists; then
+			_delete_addresses
+			_down
+		fi
+	done
+	)
+
+	_down
+
+	if [ -d /sys/class/net ]; then
+		echo "-${IFACE}" > /sys/class/net/bonding_masters
+	fi
+
+	eend 0
+	return 0
+}