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(RHEL-55708) rhel 9 fix 55708 #99

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merged 2 commits into from
Nov 27, 2024
Merged

(RHEL-55708) rhel 9 fix 55708 #99

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6522b84
fix(kernel-modules): use modalias info in get_dev_module()
athierry1 Feb 13, 2023
d784d26
fix(dracut-functions.sh): convert mmcblk to the real kernel module name
liutgnu Apr 12, 2023
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32 changes: 31 additions & 1 deletion dracut-functions.sh
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Original file line number Diff line number Diff line change
Expand Up @@ -967,12 +967,41 @@ block_is_netdevice() {
block_is_nbd "$1" || block_is_iscsi "$1" || block_is_fcoe "$1"
}

# convert the driver name given by udevadm to the corresponding kernel module name
get_module_name() {
local dev_driver
while read -r dev_driver; do
case "$dev_driver" in
mmcblk)
echo "mmc_block"
;;
*)
echo "$dev_driver"
;;
esac
done
}

# get the corresponding kernel modules of a /sys/class/*/* or/dev/* device
get_dev_module() {
local dev_attr_walk
local dev_drivers
local dev_paths
dev_attr_walk=$(udevadm info -a "$1")
dev_drivers=$(echo "$dev_attr_walk" | sed -n 's/\s*DRIVERS=="\(\S\+\)"/\1/p')
dev_drivers=$(echo "$dev_attr_walk" \
| sed -n 's/\s*DRIVERS=="\(\S\+\)"/\1/p' \
| get_module_name)

# also return modalias info from sysfs paths parsed by udevadm
dev_paths=$(echo "$dev_attr_walk" | sed -n 's/.*\(\/devices\/.*\)'\'':/\1/p')
local dev_path
for dev_path in $dev_paths; do
local modalias_file="/sys$dev_path/modalias"
if [ -e "$modalias_file" ]; then
dev_drivers="$(printf "%s\n%s" "$dev_drivers" "$(cat "$modalias_file")")"
fi
done

# if no kernel modules found and device is in a virtual subsystem, follow symlinks
if [[ -z $dev_drivers && $(udevadm info -q path "$1") == "/devices/virtual"* ]]; then
local dev_vkernel
Expand All @@ -989,6 +1018,7 @@ get_dev_module() {
[[ -n $dev_drivers && ${dev_drivers: -1} != $'\n' ]] && dev_drivers+=$'\n'
dev_drivers+=$(udevadm info -a "$dev_vpath/$dev_link" \
| sed -n 's/\s*DRIVERS=="\(\S\+\)"/\1/p' \
| get_module_name \
| grep -v -e pcieport)
done
fi
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