Discover which kernel modules correspond to your specific hardware

Question

Here is a bash script to probe your hardware, then come up with a list of kernel modules you may wish to compile into a custom kernel tailored for specific machine!
#/bin/bash
# Script by graysky based on some code found in http://www.kroah.com/lkn/ chapter 7
# Purpose: probe system for devices controlled by modules and list them via name
# Email: graysky <echo Z3JheXNreUBhcmNobGludXgudXMK | base64 -d>
##### edit this to point to the path containing your kernel source
kernelsource="/path/to/kernel/source"
clear && echo "Probing... wait a sec"
[ -f /tmp/list ] && rm -f /tmp/list
for i in `find /sys/ -name modalias -exec cat {} \;`; do
/sbin/modprobe --config /dev/null --show-depends $i 2>/dev/null >> /tmp/list ;
done
# clean up list
rev /tmp/list | cut -f 1 -d '/' | rev | sort -u | sed -e ':a;N;$!ba;s/\n//g' -e 's/.ko.gz//g' > /tmp/list2
[ -f /tmp/list3 ] && rm -f /tmp/list3
for i in $(cat /tmp/list2); do
echo "--------------- $i ---------------" >> /tmp/list3
echo " " >> /tmp/list3
find $kernelsource -type f -name Makefile | xargs grep $i | grep CONFIG_ | sed -re 's/^.+\$//' >> /tmp/list3
echo " " >> /tmp/list3
sed -i -re 's/(.+)=.+$/\1/' -i -e 's/[()+]//g' /tmp/list3
done
rm -f /tmp/list /tmp/list2
echo "Done!"
echo "To see a list of potential kernel config options for your specific hardware"
echo "less /tmp/list3"
Sample output:
--------------- ata_generic ---------------
CONFIG_ATA_GENERIC
--------------- crc-itu-t ---------------
CONFIG_CRC_ITU_T
--------------- drm_kms_helper ---------------
CONFIG_DRM_KMS_HELPER
--------------- ehci-hcd ---------------
CONFIG_USB_EHCI_HCD
--------------- evdev ---------------
CONFIG_INPUT_EVDEV
Last edited by graysky (2011-06-12 15:32:18)

Answer 1

Took a stab at refactoring this, since it interests me... came up with:
#!/bin/bash
# uses information gathered from /sys and a kernel source directory to
# determine what kernel config options are needed
kernver=${1:-$(uname -r)}
kernelsource=/home/noclaf/build/kernel26-rampage/src/linux-2.6.39.1
if [[ ! -f $kernelsource/Kbuild ]]; then
printf "error: \`%s' doesn't exist or isn't a valid kernel source directory\n" "$kernelsource"
exit 1
fi
# scan system buses
IFS=$'\n' read -r -d '' -a mods < <(find /sys/devices -name modalias -exec sort -zu {} + |
xargs -0 modprobe -aRS "${kernver:-$(uname -r)}" | sort -u)
# include root device filesystem
mods+=("$(findmnt / -uno fstype)")
# grab mdadm info if its available
if [[ -x $(type -P mdadm) ]]; then
mods+=($(mdadm -Esv /dev/[hrsv]d* /dev/{ida,cciss,ataraid,mapper}/* |
sed -n 's/.*level=\([^ ]\+\) .*/\1/p' |
sed 's/\<raid[456]\>/raid456/g' | sort -u))
fi
# scrape the kernel source for CONFIG_ options
find "$kernelsource" -name Makefile -exec grep -ZFf <(printf '%s.o\n' "${mods[@]}") {} + |
grep -Eoz 'CONFIG_[[:upper:][:digit:]_]+' | sort
Last edited by falconindy (2011-06-12 21:12:43)