#!/bin/sh [ "$VERBOSITY" = 1 ] && set -x [ "$ADDRFAM" = meta ] && exit 0 sysfs() { # Called with : # $1 = basename of the file in bonding/ to write to. # $2 = value to write. Won't write if $2 is empty. if [ "$2" ] ; then echo "$2" > "/sys/class/net/$IFACE/master/bonding/$1" return $? fi return 0 } # If the stanza bond-give-a-chance is set for a slave interface, # then force $IFACE to be the primary for some time, then restore the primary to its previous value. # This stanza is designed to workaround a bug in wpa_supplicant, when used with bonding : # wpa_supplicant expects wifi authentication packets on the bond interface, but also sends wifi authentication packets on the bond interface. # If the active interface is not the wifi interface at the time wpa_supplicant tries to authenticate, the wifi AP won't receive anything, causing the authentication to fail. # In order for the wifi authentication to succeed, one needs to give a chance to the wifi interface to send authentication packets. # "bond-give-a-chance 10" will set the wifi interface as the primary interface for 10 seconds, then restore the previous primary interface. # This is supposed to be enough to give a chance to wifi to authenticate properly. if [ "$IF_BOND_GIVE_A_CHANCE" ] ; then read primary < "/sys/class/net/$IFACE/master/bonding/primary" # Set the temporary primary. sysfs primary "$IFACE" # Wait for the link to be setup, but not longer that $IF_BOND_GIVE_A_CHANGE seconds. while [ "$IF_BOND_GIVE_A_CHANCE" -gt 0 ] ; do if ip link show $IFACE | grep -sq 'state UP'; then break fi sleep 1 IF_BOND_GIVE_A_CHANCE=`expr $IF_BOND_GIVE_A_CHANCE - 1` done # Restore the previous primary. sysfs primary "$primary" fi