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92 lines
3.0 KiB
Bash
92 lines
3.0 KiB
Bash
#!/bin/bash
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# Copyright 2021 Google LLC
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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# shellcheck source=meta-google/recipes-google/ipmi/ipmi-fru-sh/lib.sh
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source /usr/share/ipmi-fru/lib.sh || exit
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ipmi_fru_alloc '@EEPROM@' eeprom || exit
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header=()
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read_header "$eeprom" header || exit
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internal_offset=${header[$IPMI_FRU_COMMON_HEADER_INTERNAL_OFFSET_IDX]}
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if (( internal_offset == 0 )); then
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echo "Internal offset invalid for eeprom" >&2
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exit 1
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fi
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# Our MAC Address configuration lives in the internal area with a format
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# Offset Data
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# 0 Version (Always 1)
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# 1 Type (Always 1 for MAC Address)
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# 2 Area Length in bytes (Always 32 bytes or 4 IPMI FRU sectors)
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# 3-8 MAC Address Base Octets
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# 9 Num Allocate MACs from Base
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# 10-30 Padding (Always 0xFF)
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# 31 IPMI FRU Checksum
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internal=()
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read_area "$eeprom" "$internal_offset" internal 4 || exit
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if (( internal[1] != 1 || internal[2] != 32 )); then
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echo "Not a MAC internal region" >&2
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exit 1
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fi
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mac=("${internal[@]:3:6}")
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num="${internal[9]}"
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macstr=$(printf '%02x:%02x:%02x:%02x:%02x:%02x' "${mac[@]}")
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echo "Base MAC $macstr num $num" >&2
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rc=0
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# Pre-Determine if we will miss an allocation due to the number of
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# addresses the FRU actually supports.
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# shellcheck disable=SC2190
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declare -A num_to_intfs=(@NUM_TO_INTFS@)
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for key in "${!num_to_intfs[@]}"; do
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if (( key >= num )); then
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echo "${num_to_intfs[$key]} at $key is out of range" >&2
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rc=1
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fi
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done
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# Write out each MAC override to the runtime networkd configuration
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for (( i=0; i<num; i++ )); do
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if (( mac[5] > 0xff )); then
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echo "MAC assignment too large: ${mac[*]}" >&2
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rc=2
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break
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fi
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for intf in ${num_to_intfs[$i]}; do
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macstr=$(printf '%02x:%02x:%02x:%02x:%02x:%02x' "${mac[@]}")
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echo "Setting $intf to $macstr" >&2
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for override in /run/systemd/network/{00,}-bmc-$intf.network.d; do
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mkdir -p "$override"
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printf '[Link]\nMACAddress=%s\n' "$macstr" >"$override"/50-mac.conf
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done
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for override in /run/systemd/network/{00,}-bmc-$intf.netdev.d; do
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mkdir -p "$override"
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printf '[NetDev]\nMACAddress=%s\n' "$macstr" >"$override"/50-mac.conf
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done
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# In case we don't have any interface configs, set the MAC directly
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# This is safe to apply, as systemd-networkd will always override this
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# value based on written configs.
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if ip link show "$intf" >/dev/null 2>&1 && \
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! ip link set dev "$intf" address "$macstr"; then
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echo "Setting MAC($macstr) on $intf failed" >&2
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fi
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done
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(( ++mac[5] ))
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done
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exit $rc
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