ac2861e6d7
* Set MAC address of mangement port in initramfs * Fix boot0 for running in none-aboot environment
114 lines
2.7 KiB
Bash
114 lines
2.7 KiB
Bash
#!/bin/sh
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case $1 in
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prereqs)
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exit 0
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;;
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esac
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set -e
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# Extract kernel parameters
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set -- $(cat /proc/cmdline)
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items=""
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for x in "$@"; do
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case "$x" in
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Aboot=*)
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aboot_flag="${x#Aboot=}"
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;;
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net_*)
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item="${x#net_}"
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items="$items $item"
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;;
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platform=*)
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platform_flag="${x#platform=}"
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;;
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esac
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done
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random() {
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echo $(od -vAn -N1 -tu1 < /dev/urandom)
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}
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arista_net_devname() {
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local pciaddr="$1"
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local devname_prefix="$2"
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for path in $(ls -d /sys/class/net/${devname_prefix}* 2>/dev/null); do
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local devid="$(realpath "$path/device")"
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if echo "$devid" | grep -q "$pciaddr"; then
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echo "${path##*/}"
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return
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fi
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done
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}
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arista_net_rename() {
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local device_path="$1"
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local new_name="$2"
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local from_name="$3"
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devname=$(arista_net_devname "$device_path" "$from_name")
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[ -n "$devname" ] && ip link set "$devname" name "$new_name"
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}
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# Sets the MAC address to the value passed by Aboot through /proc/cmdline
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tg3fixhwaddr()
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{
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local default_tg3_hwaddr="00:10:18:00:00:00"
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local pciaddr="$1"
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local hwaddr="$2"
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devname=$(arista_net_devname "$pciaddr")
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if [ -z "$devname" ]; then
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return
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fi
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driver=$(basename $(readlink "/sys/class/net/$devname/device/driver"))
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if [ "$driver" != "tg3" ]; then
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return 0
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fi
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if [ "$hwaddr" = "$default_tg3_hwaddr" ]; then
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hwaddr=$(cat /sys/class/net/$devname/address)
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fi
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if [ "$hwaddr" = "$default_tg3_hwaddr" ]; then
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hwaddr=$(printf "%02x" "$(($(random) & 0xfe | 0x02))")
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for i in 1 2 3 4 5; do
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hwaddr=$(printf "$hwaddr:%02x" "$(($(random) & 0xfe | 0x02))")
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done
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fi
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ip link set dev "$devname" addr "$hwaddr"
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}
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if [ -n "$aboot_flag" ]; then
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for item in $items; do
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key="${item%=*}"
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value="${item#*=}"
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hwaddr=$(eval echo \${hwaddr_${key}})
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if [ -n "$hwaddr" ]; then
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tg3fixhwaddr "$value" "$hwaddr"
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fi
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done
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fi
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# Iterate over all the net_maX items found in the cmdline two times.
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# First time renaming the interfaces to maX.
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# The second time renaming them to their final name ethX.
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if [ -n "$aboot_flag" -a "$platform_flag" == 'rook' ]; then
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for item in $items; do
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key="${item%=*}"
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value="${item#*=}"
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arista_net_rename "$value" "$key" eth
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done
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for item in $items; do
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key="${item%=*}"
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value="${item#*=}"
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index="${key#ma}"
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index="$(( $index - 1 ))"
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newKey="eth$index"
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arista_net_rename "$value" "$newKey" ma
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done
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fi
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