From mboxrd@z Thu Jan  1 00:00:00 1970
From: md@Linux.IT (Marco d'Itri)
Date: Mon, 01 Nov 2004 01:47:24 +0000
Subject: Re: ide.rc
Message-Id: <20041101014724.GA22438@wonderland.linux.it>
MIME-Version: 1
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List-Id: <linux-hotplug.vger.kernel.org>
References: <20041029141509.GA9119@wonderland.linux.it>
In-Reply-To: <20041029141509.GA9119@wonderland.linux.it>
To: linux-hotplug@vger.kernel.org


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On Oct 30, "Alexander E. Patrakov" <patrakov@ums.usu.ru> wrote:

> This script would be probably a bit wrong for my old server. This server has a 
> LSI Logic SCSI adapter (with two hard disks attached) and a ServerWorks IDE 
> adapter with one attached CD-ROM drive. For some strange reason, to use this 
> CD-ROM, I must have both serverworks, ide_generic and ide_cd modules loaded. 
> Your script won't load ide_generic. The kernel is 2.6.7-1-686.

As it has been explained, this is probably a bug/feature in the
serverworks driver. The correct solution would be for the debian kernel
package to ship a /etc/modprobe.d/kernel-image-2.6.7-1-686 file
containing something like:

install serverworks /sbin/modprobe --ignore-install serverworks && { /sbin/modprobe ide-generic; /sbin/modprobe ide-cd; }

(Do you mind opening a bug about this in the debian BTS?)

> Also, your script starts before pci.rc (because "i" is before "p" in the 
> alphabet) and therefore will not find anything on my old server at all (the 
> serverworks module is loaded by pci.rc).

Good point. tsort(1) comes to help, as you can see in the attached
replacement for the main hotplug init script.
There is no ide.agent script because there are no "real" IDE hotplug
events from the kernel. Probably there is no need for them, this is
just a workaround to load the modules for udev.

-- 
ciao, |
Marco | [8851 soOFdKlIC1OSk]

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#!/bin/sh -e
#
# description:	Starts and stops each hotpluggable subsystem.
#		On startup, may simulate hotplug events for devices
#		that were present at boot time, before filesystems
#		used by /sbin/hotplug became available.

PATH=/sbin:/bin:/usr/sbin:/usr/bin

[ -x /sbin/hotplug ] || exit 0

if [ ! -f /proc/sys/kernel/hotplug ]; then
   echo "Kernel hotplug support not enabled."
   exit 0
fi

[ -e /etc/default/hotplug ] && . /etc/default/hotplug

run_rcs() {
    SUBSYSTEMS=$(
    {
    for RC in /etc/hotplug/*.rc; do
	basename=${RC#/etc/hotplug/}
	name=${basename%.rc}
	echo "$name $name"
    done
    # follows couples of ordered elements
    echo "ide pci"
    echo "usb pci"
    } | tsort | tac
    )

    for name in $SUBSYSTEMS; do
	printf "   %-8s\n" $name
	if [ "$(eval echo \$HOTPLUG_RC_$name)" = no ]; then
	    printf "   %-8s [disabled]\n" $name
	    continue
	fi
	set +e
	/etc/hotplug/$name.rc $1
	RC_STATUS=$?
	set -e
	if [ "$1" = status ]; then
	    continue
	fi
	if [ $RC_STATUS = 0 ]; then
	    printf "   %-8s [success]\n" $name
	else
	    printf "   %-8s [failed]\n" $name
	fi
    done
}


case "$1" in
start)
    echo "Starting hotplug subsystem:"
    echo /sbin/hotplug > /proc/sys/kernel/hotplug
    run_rcs $1
    echo "done"
    ;;

stop)
    echo "Stopping hotplug subsystem:"
    run_rcs $1
    echo /bin/true > /proc/sys/kernel/hotplug
    echo "done"
    ;;

restart|force-reload)
    echo -n "Restarting hotplug subsystem:"
    run_rcs stop
    run_rcs start
    echo "."
    ;;

status)
    run_rcs $1
    ;;

*)
    echo "Usage: $0 {start|stop|restart|status|force-reload}" >&2
    exit 1
    ;;
esac

exit 0

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