From 4c83fd10ab2a43272eab59719486064085beb2df Mon Sep 17 00:00:00 2001

From: Harald Hoyer <harald@redhat.com>

Date: Fri, 15 Apr 2016 11:27:20 +0200

Subject: [PATCH] watchdog/module-setup.sh: rewrite

- use local variables with _

- use associative array for the kernel modules

- install emergency hook even in the systemd case

- follow device path until /sys is reached

- set kernel version for modprobe checking

---

 modules.d/04watchdog/module-setup.sh | 92 ++++++++++++++++++++----------------

 1 file changed, 51 insertions(+), 41 deletions(-)

diff --git a/modules.d/04watchdog/module-setup.sh b/modules.d/04watchdog/module-setup.sh

index 6b35f9f5..31102f4e 100755

--- a/modules.d/04watchdog/module-setup.sh

+++ b/modules.d/04watchdog/module-setup.sh

@@ -13,54 +13,64 @@ depends() {

 install() {

     # Do not add watchdog hooks if systemd module is included

     # In that case, systemd will manage watchdog kick

-    if dracut_module_included "systemd"; then

-	    return

+    if ! dracut_module_included "systemd"; then

+        inst_hook cmdline   00 "$moddir/watchdog.sh"

+        inst_hook cmdline   50 "$moddir/watchdog.sh"

+        inst_hook pre-trigger 00 "$moddir/watchdog.sh"

+        inst_hook initqueue 00 "$moddir/watchdog.sh"

+        inst_hook mount     00 "$moddir/watchdog.sh"

+        inst_hook mount     50 "$moddir/watchdog.sh"

+        inst_hook mount     99 "$moddir/watchdog.sh"

+        inst_hook pre-pivot 00 "$moddir/watchdog.sh"

+        inst_hook pre-pivot 99 "$moddir/watchdog.sh"

+        inst_hook cleanup   00 "$moddir/watchdog.sh"

+        inst_hook cleanup   99 "$moddir/watchdog.sh"

     fi

-    inst_hook cmdline   00 "$moddir/watchdog.sh"

-    inst_hook cmdline   50 "$moddir/watchdog.sh"

-    inst_hook pre-trigger 00 "$moddir/watchdog.sh"

-    inst_hook initqueue 00 "$moddir/watchdog.sh"

-    inst_hook mount     00 "$moddir/watchdog.sh"

-    inst_hook mount     50 "$moddir/watchdog.sh"

-    inst_hook mount     99 "$moddir/watchdog.sh"

-    inst_hook pre-pivot 00 "$moddir/watchdog.sh"

-    inst_hook pre-pivot 99 "$moddir/watchdog.sh"

-    inst_hook cleanup   00 "$moddir/watchdog.sh"

-    inst_hook cleanup   99 "$moddir/watchdog.sh"

     inst_hook emergency 02 "$moddir/watchdog-stop.sh"

     inst_multiple -o wdctl

 }

 installkernel() {

+    local -A _drivers

+    local _alldrivers _active _wdtdrv _wdtppath _dir

     [[ -d /sys/class/watchdog/ ]] || return

-    wdtcmdline=""

-    for dir in /sys/class/watchdog/*; do

-	    [[ -d "$dir" ]] || continue

-	    [[ -f "$dir/state" ]] || continue

-	    active=$(< "$dir/state")

-	    ! [[ $hostonly ]] || [[ "$active" =  "active" ]] || 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 -R $wdtdrv)

-	    instmods $wdtdrv

-	    wdtcmdline="$wdtcmdline$(echo $wdtdrv | tr " " ","),"

-	    # 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 [ -f "$wdtppath/modalias" ]

-	    do

-		    wdtpdrv=$(< "$wdtppath/modalias")

-		    wdtpdrv=$(modprobe -R $wdtpdrv)

-		    instmods $wdtpdrv

-		    wdtcmdline="$wdtcmdline$(echo $wdtpdrv | tr " " ","),"

-		    wdtppath=$(readlink -f "$wdtppath/..")

-	    done

+    for _dir in /sys/class/watchdog/*; do

+        [[ -d "$_dir" ]] || continue

+        [[ -f "$_dir/state" ]] || continue

+        _active=$(< "$_dir/state")

+        ! [[ $hostonly ]] || [[ "$_active" =  "active" ]] || 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

-    [[ $wdtcmdline = "" ]] || echo "rd.driver.pre=$wdtcmdline" > ${initdir}/etc/cmdline.d/00-watchdog.conf

+    _alldrivers="${!_drivers[*]}"

+    [[ $_alldrivers ]] && echo "rd.driver.pre=${_alldrivers// /,}" > ${initdir}/etc/cmdline.d/00-watchdog.conf

 }