diff options
Diffstat (limited to 'meta-openbmc-mods/meta-common/recipes-network/network/static-mac-addr/mac-check')
| -rw-r--r-- | meta-openbmc-mods/meta-common/recipes-network/network/static-mac-addr/mac-check | 115 |
1 files changed, 115 insertions, 0 deletions
diff --git a/meta-openbmc-mods/meta-common/recipes-network/network/static-mac-addr/mac-check b/meta-openbmc-mods/meta-common/recipes-network/network/static-mac-addr/mac-check new file mode 100644 index 000000000..2578785b4 --- /dev/null +++ b/meta-openbmc-mods/meta-common/recipes-network/network/static-mac-addr/mac-check @@ -0,0 +1,115 @@ +#!/bin/sh +# Copyright 2018 Intel Corporation +# +# Licensed under the Apache License, Version 2.0 (the "License"); +# you may not use this file except in compliance with the License. +# You may obtain a copy of the License at +# +# http://www.apache.org/licenses/LICENSE-2.0 +# +# Unless required by applicable law or agreed to in writing, software +# distributed under the License is distributed on an "AS IS" BASIS, +# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +# See the License for the specific language governing permissions and +# limitations under the License. + +SOFS_MNT=/var/sofs +SOFS_MACDIR=${SOFS_MNT}/factory-settings/network/mac + +read_hw_mac() { + local iface="$1" + cat /sys/class/net/"$iface"/address 2>/dev/null | tr [:upper:] [:lower:] 2>/dev/null +} + +set_hw_mac() { + local iface="$1" + local mac="$2" + ip link show dev "$iface" | grep -q "${iface}:.*\<UP\>" 2>/dev/null + local up=$? + [[ $up -eq 0 ]] && ip link set dev "$iface" down + ip link set dev "$iface" address "$mac" + [[ $up -eq 0 ]] && ip link set dev "$iface" up +} + +read_sofs_mac() { + local iface="$1" + cat "${SOFS_MACDIR}/${iface}" 2>/dev/null | tr [:upper:] [:lower:] 2>/dev/null +} + +read_fw_env_mac() { + local envname="$1" + fw_printenv "$envname" 2>/dev/null | sed "s/^$envname=//" 2>/dev/null | tr [:upper:] [:lower:] 2>/dev/null +} + +set_fw_env_mac() { + local envname="$1" + local mac="$2" + fw_setenv "$envname" "$mac" +} + +create_macdir() { +if [ -a ${SOFS_MACDIR} ]; then + if [ ! -d ${SOFS_MACDIR} ]; then + rm -rf ${SOFS_MACDIR} + mkdir -p ${SOFS_MACDIR} + fi +else + mkdir -p ${SOFS_MACDIR} +fi +return 0 +} + +mac_check() { + local iface="$1" + local envname="$2" + + # Read the MAC address in use by the NIC + local hw_mac=$(read_hw_mac "$iface") + + # Read the MAC address stored in the non-volatile file provisioned in + # manufacturing. + local sofs_mac=$(read_sofs_mac "$iface") + + if [ -n "$sofs_mac" ] && [ "$hw_mac" != "$sofs_mac" ]; then + # A factory assigned address was found, and it is newly assigned. + # Update the active interface and save the new value to the u-boot + # environment. + set_hw_mac "$iface" "$sofs_mac" + set_fw_env_mac "$envname" "$sofs_mac" + return $? + elif [ -n "$hw_mac" ]; then + # Read the MAC address stored by U-Boot + local fw_env_mac=$(read_fw_env_mac "$envname") + if [ -z "$fw_env_mac" ] || [ "$fw_env_mac" != "$hw_mac" ]; then + set_fw_env_mac "$envname" "$hw_mac" + return $? + fi + else + # Could not identify a MAC address + return 255 + fi + return 0 +} + +create_macdir + +error=0 +first_error_seen=0 + +while read IFACE UBDEV; do + # Try to configure the MAC address if the kernel finds the NIC. Blindly + # trying all of the interfaces listed in the DOCSTRING (END_CONF) below + # may result in first_error_seen being set to a non-zero value. If that + # happens the journal log will report the error, which is undesirable. + if [ -h /sys/class/net/$IFACE ]; then + mac_check "$IFACE" "$UBDEV" + error=$? + if [ $error -ne 0 ] && [ $first_error_seen -eq 0 ]; then + first_error_seen=$error + fi + fi +done <<-END_CONF + eth0 eth1addr + eth1 ethaddr +END_CONF +exit $first_error_seen |