80 lines
2.8 KiB
Bash
Executable File
80 lines
2.8 KiB
Bash
Executable File
#!/bin/bash
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# called by dracut
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check() {
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return 255
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}
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# called by dracut
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depends() {
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return 0
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}
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# called by dracut
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install() {
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# Do not add watchdog hooks if systemd module is included
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# In that case, systemd will manage watchdog kick
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if ! dracut_module_included "systemd"; then
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inst_hook cmdline 00 "$moddir/watchdog.sh"
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inst_hook cmdline 50 "$moddir/watchdog.sh"
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inst_hook pre-trigger 00 "$moddir/watchdog.sh"
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inst_hook initqueue 00 "$moddir/watchdog.sh"
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inst_hook mount 00 "$moddir/watchdog.sh"
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inst_hook mount 50 "$moddir/watchdog.sh"
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inst_hook mount 99 "$moddir/watchdog.sh"
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inst_hook pre-pivot 00 "$moddir/watchdog.sh"
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inst_hook pre-pivot 99 "$moddir/watchdog.sh"
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inst_hook cleanup 00 "$moddir/watchdog.sh"
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inst_hook cleanup 99 "$moddir/watchdog.sh"
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fi
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inst_hook emergency 02 "$moddir/watchdog-stop.sh"
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inst_multiple -o wdctl
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}
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installkernel() {
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local -A _drivers
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local _alldrivers _active _wdtdrv _wdtppath _dir
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[[ -d /sys/class/watchdog/ ]] || return
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for _dir in /sys/class/watchdog/*; do
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[[ -d "$_dir" ]] || continue
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[[ -f "$_dir/state" ]] || continue
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_active=$(< "$_dir/state")
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! [[ $hostonly ]] || [[ "$_active" = "active" ]] || continue
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# device/modalias will return driver of this device
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_wdtdrv=$(< "$_dir/device/modalias")
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# There can be more than one module represented by same
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# modalias. Currently load all of them.
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# TODO: Need to find a way to avoid any unwanted module
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# represented by modalias
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_wdtdrv=$(modprobe --set-version "$kernel" -R $_wdtdrv 2>/dev/null)
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if [[ $_wdtdrv ]]; then
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instmods $_wdtdrv
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for i in $_wdtdrv; do
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_drivers[$i]=1
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done
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fi
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# however in some cases, we also need to check that if there is
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# a specific driver for the parent bus/device. In such cases
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# we also need to enable driver for parent bus/device.
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_wdtppath=$(readlink -f "$_dir/device")
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while [[ -d "$_wdtppath" ]] && [[ "$_wdtppath" != "/sys" ]]; do
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_wdtppath=$(readlink -f "$_wdtppath/..")
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[[ -f "$_wdtppath/modalias" ]] || continue
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_wdtdrv=$(< "$_wdtppath/modalias")
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_wdtdrv=$(modprobe --set-version "$kernel" -R $_wdtdrv 2>/dev/null)
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if [[ $_wdtdrv ]]; then
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instmods $_wdtdrv
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for i in $_wdtdrv; do
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_drivers[$i]=1
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done
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fi
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done
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done
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# ensure that watchdog module is loaded as early as possible
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_alldrivers="${!_drivers[*]}"
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[[ $_alldrivers ]] && echo "rd.driver.pre=${_alldrivers// /,}" > ${initdir}/etc/cmdline.d/00-watchdog.conf
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return 0
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}
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