esel: Add a logging backend for bmc based machines

This patch adds a backend for bmc based machines running AMI firmware
supporting the OEM extended sel commands. Errors are logged in pel
format to the bmc.

Signed-off-by: Alistair Popple <alistair@popple.id.au>
Signed-off-by: Stewart Smith <stewart@linux.vnet.ibm.com>

1 files changed, 55 insertions, 0 deletions

diff --git a/external/read_esel.sh b/external/read_esel.sh
new file mode 100644
index 00000000..492fbce1
--- /dev/null
+++ b/external/read_esel.sh
@@ -0,0 +1,55 @@
+#!/bin/bash
+# Copyright 2013-2014 IBM Corp.
+#
+# 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.
+set -e
+
+BMC_HOST=$1
+RECORD_ID=$2
+
+BMC_USER=admin
+BMC_PASS=admin
+
+if [ -z "$BMC_HOST" -o -z "$RECORD_ID" ]; then
+    echo "Usage: $0 <bmc hostname> <record id>"
+    echo "Example: $0 bmc 0xa > pel.bin"
+    echo ''
+    echo 'Record ids can be found using ipmitool with the "sel list" command. Records with'
+    echo 'a description of "OEM record df" contain extended SEL information (in PEL'
+    echo 'format) which can be extracted with this tool.'
+    exit -1
+fi
+
+# Convert a number into 2 hex-bytes in little-endian order
+function conv_le {
+    echo $(for i in $(printf %04x $1 | grep -o .. | tac); do echo -n "0x$i "; done)
+}
+
+function conv_native {
+    echo -n "0x${2}${1}"
+}
+
+record=$(conv_le $2)
+offset=0
+progress=0
+
+while [ $progress = 0 ]; do
+    result=$(ipmitool -H ${BMC_HOST} -I lan -U ${BMC_USER} -P ${BMC_PASS} raw 0x32 0xf1 ${record} $(conv_le ${offset}))
+    len=$(conv_native $(echo ${result} | cut -d " " -f 1-2))
+    progress=$(($(echo ${result} | cut -d " " -f 3)))
+    data="$data "$(echo -n ${result} | cut -d " " -f 6-)
+    offset=$(($offset + ${#data}/3))
+done
+
+echo -n ${data} | cut -d " " -f 1-$(($len)) | xxd -r -p