#!/bin/bash
# called by dracut
check() {
return 255
}
# called by dracut
depends() {
return 0
}
# called by dracut
install() {
return 0
}
installkernel() {
local -A _drivers
local _alldrivers _wdtdrv _wdtppath _dir
[[ -d /sys/class/watchdog/ ]] || return
for _dir in /sys/class/watchdog/*; do
[[ -d "$_dir" ]] || continue
[[ -f "$_dir/state" ]] || continue
# device/modalias will return driver of this device
_wdtdrv=$(< "$_dir/device/modalias")
# There can be more than one module represented by same
# modalias. Currently load all of them.
# TODO: Need to find a way to avoid any unwanted module
# represented by modalias
_wdtdrv=$(modprobe --set-version "$kernel" -R $_wdtdrv 2>/dev/null)
if [[ $_wdtdrv ]]; then
instmods $_wdtdrv
for i in $_wdtdrv; do
_drivers[$i]=1
done
fi
# however in some cases, we also need to check that if there is
# a specific driver for the parent bus/device. In such cases
# we also need to enable driver for parent bus/device.
_wdtppath=$(readlink -f "$_dir/device")
while [[ -d "$_wdtppath" ]] && [[ "$_wdtppath" != "/sys" ]]; do
_wdtppath=$(readlink -f "$_wdtppath/..")
[[ -f "$_wdtppath/modalias" ]] || continue
_wdtdrv=$(< "$_wdtppath/modalias")
_wdtdrv=$(modprobe --set-version "$kernel" -R $_wdtdrv 2>/dev/null)
if [[ $_wdtdrv ]]; then
instmods $_wdtdrv
for i in $_wdtdrv; do
_drivers[$i]=1
done
fi
done
done
# ensure that watchdog module is loaded as early as possible
_alldrivers="${!_drivers[*]}"
[[ $_alldrivers ]] && echo "rd.driver.pre=${_alldrivers// /,}" > ${initdir}/etc/cmdline.d/00-watchdog.conf
return 0
}