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# Copyright (c) 2007-2008 Roy Marples <roy@marples.name>
# 2017 Marc Schiffbauer <mschiff@gentoo.org>
# Released under the 2-clause BSD license.
# shellcheck shell=sh disable=SC1008
bonding_depend()
{
before interface macchanger
program ip 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 ifenslave
fi
local netns
eval netns="\$netns_${IFVAR}"
[ -n "${netns}" ] && program ip
return 0
}
_config_vars="$_config_vars slaves"
_is_bond()
{
_netns [ -f "/proc/net/bonding/${IFACE}" ]
}
bonding_pre_start()
{
local x= s= n= i= 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
_netns 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
_netns [ -d /sys/class/net ] && for n in mode miimon; do
x=/sys/class/net/"${IFACE}"/bonding/$n
_netns [ -f "${x}" ] || continue
eval s=\$${n}_${IFVAR}
if [ -n "${s}" ]; then
einfo "Setting ${n}: ${s}"
_netns echo "${s}" \>"${x}" || \
eerror "Failed to configure $n (${n}_${IFVAR})"
fi
done
# Configure arp ip targets, they need to be added one after another
# With a leading '+' as a prefix.
n=arp_ip_target
x=/sys/class/net/"${IFACE}"/bonding/$n
_netns [ -d /sys/class/net ] && if _netns [ -f "$x" ]; then
eval s=\$${n}_${IFVAR}
if [ -n "${s}" ]; then
for i in $s; do
einfo "Adding ${n}: ${i}"
_netns echo "+${i#+}" \>"${x}" || \
eerror "Failed to add $i (${n}_${IFVAR})"
done
fi
fi
# Nice and dynamic for remaining options:)
_netns [ -d /sys/class/net ] && for x in $(_netns glob /sys/class/net/"${IFACE}"/bonding/\*); do
_netns [ -f "${x}" ] || continue
n=${x##*/}
# These entries are already handled above.
case "$n" in
mode) continue ;;
miimon) continue ;;
arp_ip_target) continue ;;
esac
# Check if anything to do.
eval s=\$${n}_${IFVAR}
if [ -n "${s}" ]; then
einfo "Setting ${n}: ${s}"
_netns echo "${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
if [ -x "$(command -v ip 2>/dev/null)" ]; then
_netns ip link set ${IFACE} up
_netns ip address add ${addr} dev ${IFACE}
else
ifconfig ${IFACE} ${addr} up
fi
else
# warn if root on nfs and no subsume interface supplied
local root_fs_type=$(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 _netns [ -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=$oiface
_netns echo "+${primary}" \> $sys_bonding_path/slaves
_netns echo "${primary}" \> $sys_bonding_path/primary
fi
for s in ${slaves}; do
[ "${s}" = "${primary}" ] && continue
if ! _netns grep -q ${s} $sys_bonding_path/slaves; then
IFACE=$s
_down
IFACE=$oiface
_netns echo "+${s}" \> $sys_bonding_path/slaves
fi
done
else
_netns ifenslave "${IFACE}" ${slaves} >/dev/null
fi
eend $?
return 0 #important
}
bonding_stop()
{
_is_bond || return 0
# Wipe subsumed interface
if [ -n "${subsume}" ]; then
if [ -x "$(command -v ip)" ]; then
_netns ip address flush dev ${subsume}
else
ifconfig ${subsume} 0.0.0.0
fi
fi
local slaves= s=
slaves=$( \
_netns 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 _netns [ -d /sys/class/net ]; then
for s in ${slaves}; do
_netns echo -"${s}" \> /sys/class/net/"${IFACE}"/bonding/slaves
done
else
_netns ifenslave -d "${IFACE}" ${slaves}
fi
# reset all slaves
(
for IFACE in ${slaves}; do
if _exists; then
_delete_addresses
_down
fi
done
)
_down
if _netns [ -d /sys/class/net ]; then
_netns echo "-${IFACE}" \> /sys/class/net/bonding_masters
fi
eend 0
return 0
}
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