openrc/net/ccwgroup.sh
Mike Frysinger c427d3c1fe net: ccwgroup: smooth up/down process
We need to bring the link up ourselves after we've properly configured
the device.  The common code tries to bring the link up itself, but it
does so before things are configured, and so it ends up failing.

When shutting down, we need to wait for the kernel to finish destroying
the interface.  Otherwise, when doing a restart, openrc is quick enough
to tell the kernel to destroy things, but then start trying to bring it
back up before the kernel has finished.

X-Gentoo-Bug: 367467
X-Gentoo-Bug-URL: http://bugs.gentoo.org/367467
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
2011-06-28 00:02:11 -04:00

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# Copyright (c) 2007-2008 Roy Marples <roy@marples.name>
# All rights reserved. Released under the 2-clause BSD license.
_config_vars="$_config_vars ccwgroup"
ccwgroup_depend()
{
before interface
}
ccwgroup_load_modules()
{
# make sure we have ccwgroup support or this is a crap shoot
if [ ! -d /sys/bus/ccwgroup ] ; then
modprobe -q ccwgroup
if [ ! -d /sys/bus/ccwgroup ] ; then
eerror "ccwgroup support missing in kernel"
return 1
fi
fi
# verify the specific interface is supported
if [ ! -d /sys/bus/ccwgroup/drivers/$1 ] ; then
modprobe $1 >& /dev/null
if [ ! -d /sys/bus/ccwgroup/drivers/$1 ] ; then
eerror "$1 support missing in kernel"
return 1
fi
fi
return 0
}
ccwgroup_pre_start()
{
local ccwgroup="$(_get_array "ccwgroup_${IFVAR}")"
[ -z "${ccwgroup}" ] && return 0
local ccw_type
eval ccw_type=\${ccwgroup_type_${IFVAR}:-qeth}
ccwgroup_load_modules ${ccw_type} || return 1
einfo "Enabling ccwgroup/${ccw_type} on ${IFACE}"
set -- ${ccwgroup}
local first=$1; shift
if [ -e /sys/devices/${ccw_type}/${first}/online ]; then
echo "0" >/sys/devices/${ccw_type}/${first}/online
else
echo "${first}$(printf ',%s' "$@")" >/sys/bus/ccwgroup/drivers/${ccw_type}/group
fi
local var val
for var in $(_get_array "ccwgroup_opts_${IFVAR}") online=1 ; do
val=${var#*=}
var=${var%%=*}
echo "${val}" > /sys/devices/${ccw_type}/${first}/${var}
done
eend $?
# Now that we've properly configured the device, we can run
# bring the interface up. Common code tried to do this already,
# but it failed because we didn't setup sysfs yet.
_up
}
ccwgroup_pre_stop()
{
local path="/sys/class/net/${IFACE}"
# Erase any existing ccwgroup to be safe
service_set_value ccwgroup_device ""
service_set_value ccwgroup_type ""
[ ! -L "${path}"/device/driver ] && return 0
case "$(readlink "${path}"/device/driver)" in
*/bus/ccwgroup/*) ;;
*) return 0;;
esac
local device
device="$(readlink "${path}"/device)"
device=${device##*/}
service_set_value ccwgroup_device "${device}"
device="$(readlink "${path}"/device/driver)"
device=${device##*/}
service_set_value ccwgroup_type "${device}"
}
ccwgroup_post_stop()
{
local device="$(service_get_value ccwgroup_device)"
[ -z "${device}" ] && return 0
local ccw_type="$(service_get_value ccwgroup_type)"
local path="/sys/devices/${ccw_type}/${device}"
einfo "Disabling ccwgroup/${ccw_type} on ${IFACE}"
if echo "0" >"${path}"/online &&
echo "1" >"${path}"/ungroup ; then
# The device doesn't disappear right away which breaks
# restart, or a quick start up, so wait around.
while [ -e "${path}" ] ; do :; done
fi
eend $?
}