9de6b2ca12
The interface renaming logic fails if one interface is missing. Because of the `set -e` the whole initramfs hook would abort early on error. This change fixes the current behavior to make sure missing interfaces are properly skipped and ensure existing interface are renamed.
116 lines
2.7 KiB
Bash
116 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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if [ -n "$devname" ]; then
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ip link set "$devname" name "$new_name"
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fi
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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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