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|
#!/bin/sh
Wait_for_carrier ()
{
# $1 = network device
echo -n "Waiting for link to come up on $1... "
ip link set $1 up
for step in $(seq 1 15)
do
carrier=$(cat /sys/class/net/$1/carrier \
2>/dev/null)
case "${carrier}" in
1)
echo -e "\nLink is up"
return
;;
*)
# Counter
echo -n "$step "
;;
esac
sleep 1
done
echo -e "\nError - carrier not detected on $1."
ip link set $1 down
}
Select_eth_device ()
{
# Boot type in initramfs's config
bootconf=$(egrep '^BOOT=' /conf/initramfs.conf | tail -1)
# can be superseded by command line (used by Debian-Live's netboot for example)
for ARGUMENT in ${LIVE_BOOT_CMDLINE}
do
case "${ARGUMENT}" in
netboot=*)
NETBOOT="${ARGUMENT#netboot=}"
;;
esac
done
if [ "$bootconf" != "BOOT=nfs" ] && [ -z "$NETBOOT" ] && [ -z "$FETCH" ] && [ -z "$FTPFS" ] && [ -z "$HTTPFS" ]
then
# Not a net boot : nothing to do
return
fi
# we want to do some basic IP
modprobe -q af_packet
# Ensure all our net modules get loaded so we can actually compare MAC addresses...
udevadm trigger
udevadm settle
# Available Ethernet interfaces ?
l_interfaces=""
# See if we can derive the boot device
Device_from_bootif
if [ -z "$DEVICE" ]
then
echo "Waiting for ethernet card(s) up... If this fails, maybe the ethernet card is not supported by the kernel `uname -r`?"
while [ -z "$l_interfaces" ]
do
l_interfaces="$(cd /sys/class/net/ && ls -d * 2>/dev/null | grep -v "lo")"
done
if [ $(echo $l_interfaces | wc -w) -lt 2 ]
then
# only one interface : no choice
echo "DEVICE=$l_interfaces" >> /conf/param.conf
Wait_for_carrier $l_interfaces
return
fi
# If user force to use specific device, write it
for ARGUMENT in ${LIVE_BOOT_CMDLINE}
do
case "${ARGUMENT}" in
live-netdev=*)
NETDEV="${ARGUMENT#live-netdev=}"
echo "DEVICE=$NETDEV" >> /conf/param.conf
echo "Found live-netdev parameter, forcing to to use network device $NETDEV."
Wait_for_carrier $NETDEV
return
;;
esac
done
else
l_interfaces="$DEVICE"
fi
found_eth_dev=""
echo -n "Looking for a connected Ethernet interface."
for interface in $l_interfaces
do
# ATTR{carrier} is not set if this is not done
echo -n " $interface ?"
ipconfig -c none -d $interface -t 1 >/dev/null 2>&1
sleep 1
done
echo ''
for step in 1 2 3 4 5
do
for interface in $l_interfaces
do
# Skip the interface if it's already found.
IN_IT=no
for DEV in $found_eth_dev ; do
if [ "${DEV}" = "$interface" ] ; then
IN_IT=yes
fi
done
if [ "${IN_IT}" = "no" ] ; then
ip link set $interface up
carrier=$(cat /sys/class/net/$interface/carrier \
2>/dev/null)
# link detected
if [ "${carrier}" = 1 ] ; then
echo "Connected $interface found"
# inform initrd's init script :
if [ -z "${found_eth_dev}" ] ; then
found_eth_dev="$interface"
else
found_eth_dev="$found_eth_dev $interface"
fi
fi
fi
done
# wait a bit
sleep 1
done
if [ -n "$found_eth_dev" ]
then
echo "Done searching for connected Ethernet interface."
echo "Writing DEVICE='$found_eth_dev' in /conf/param.conf."
echo "DEVICE='$found_eth_dev'" >> /conf/param.conf
else
echo "Could not find an interface that is up: giving-up..."
fi
return
}
|
