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#!/bin/sh
#
# Format:
# bond=<bondname>[:<bondslaves>[:<options>[:<mtu>]]]
#
# bondslaves is a comma-separated list of physical (ethernet) interfaces
# options is a comma-separated list on bonding options (modinfo bonding for details) in format compatible with initscripts
# if options include multi-valued arp_ip_target option, then its values should be separated by semicolon.
#
# bond without parameters assumes bond=bond0:eth0,eth1:mode=balance-rr
#
# if the mtu is specified, it will be set on the bond master
#
# We translate list of slaves to space-separated here to make it easier to loop over them in ifup
# Ditto for bonding options
parsebond() {
local v="${1}":
set --
while [ -n "$v" ]; do
set -- "$@" "${v%%:*}"
v=${v#*:}
done
case $# in
0)
bondname=bond0
bondslaves="eth0 eth1"
;;
1)
bondname=$1
bondslaves="eth0 eth1"
;;
2)
bondname=$1
bondslaves=$(str_replace "$2" "," " ")
;;
3)
bondname=$1
bondslaves=$(str_replace "$2" "," " ")
bondoptions=$(str_replace "$3" "," " ")
;;
4)
bondname=$1
bondslaves=$(str_replace "$2" "," " ")
bondoptions=$(str_replace "$3" "," " ")
bondmtu=$4
;;
*) die "bond= requires zero to four parameters" ;;
esac
}
# Parse bond for bondname, bondslaves, bondmode, bondoptions and bondmtu
for bond in $(getargs bond=); do
unset bondname
unset bondslaves
unset bondoptions
unset bondmtu
if [ "$bond" != "bond" ]; then
parsebond "$bond"
fi
# Simple default bond
if [ -z "$bondname" ]; then
bondname=bond0
bondslaves="eth0 eth1"
fi
# Make it suitable for initscripts export
bondoptions=$(str_replace "$bondoptions" ";" ",")
{
echo "bondname=$bondname"
echo "bondslaves=\"$bondslaves\""
echo "bondoptions=\"$bondoptions\""
echo "bondmtu=\"$bondmtu\""
} > "/tmp/bond.${bondname}.info"
done
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