Package: ifplugd
Version: 0.28-15
Severity: normal
Ifplugd can restart interfaces on suspend/resume, but only static interfaces
that are managed by /etc/init.d/ifplugd.
The same is needed for hotplug interfaces, for which ifplugd is started by
udev. Otherwise the network might not work after resume because no
DHCP lease is requested, etc.
Attached is a script for pm-utils and apmd, that implements restarting
for hotplug interfaces. It should be put in /etc/pm/sleep.d and
/etc/apm/scripts.d and replace the current script.
This script extends the one attached to #527583.
-- Package-specific info:
/sys/class/net/ interfaces:
/sys/class/net/eth0/
/sys/class/net/lo/
-- System Information:
Debian Release: squeeze/sid
APT prefers testing
APT policy: (990, 'testing'), (500, 'unstable'), (500, 'stable'), (1,
'experimental')
Architecture: amd64 (x86_64)
Kernel: Linux 2.6.31.4-amd64 (SMP w/2 CPU cores)
Locale: LANG=POSIX, LC_CTYPE=de_AT.utf8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash
Versions of packages ifplugd depends on:
ii debconf [debconf-2.0] 1.5.27 Debian configuration management sy
ii libc6 2.9-25 GNU C Library: Shared libraries
ii libdaemon0 0.13-3 lightweight C library for daemons
ii lsb-base 3.2-23 Linux Standard Base 3.2 init scrip
Versions of packages ifplugd recommends:
ii ifupdown 0.6.9 high level tools to configure netw
Versions of packages ifplugd suggests:
pn wpasupplicant <none> (no description available)
-- debconf information:
ifplugd/interfaces:
ifplugd/hotplug_interfaces:
ifplugd/args: -q -f -u0 -d10 -w -I
ifplugd/suspend_action: stop
#!/bin/sh
#
# suspend/resume ifplugd
[ -f /etc/default/ifplugd ] || exit 0
. /etc/default/ifplugd
[ "$SUSPEND_ACTION" ] || [ "$SUSPEND_ACTION" != "none" ] || exit 0
if [ "$SUSPEND_ACTION" = "suspend" ] ; then
RESUME_ACTION="resume"
elif [ "$SUSPEND_ACTION" = "stop" ] ; then
RESUME_ACTION="start"
else
exit 0
fi
# Hotplug interfaces
#
# ifplugd for interfaces in HOTPLUG_INTERFACES is started by udev.
# The ifplugd init.d script doesn't touch them. We still want to
# stop/start these interfaces on suspend/resume. Here is some
# hackery to do this.
# use pm-utils functions for state save/restore, if available
[ -f "${PM_FUNCTIONS}" ] && . "${PM_FUNCTIONS}"
# name of the save/restore state
IFPLUGD_STATE="ifplugd_ifs"
# return 0 if the first parm is an element of the remaining parms
# or they contain the special value "all"
elem_of() {
local E=$1
shift
echo $@ | grep -Eq "(\\<all\\>)|(\\<${E}\\>)"
}
# save state using pm-utils
save_state() {
savestate ${IFPLUGD_STATE} 2>/dev/null
}
# load saved state using pm-utils
load_state() {
restorestate ${IFPLUGD_STATE} 2>/dev/null
}
# filter only hotplug interfaces
filter_hotplug_ifs() {
while read L; do
for IF in $L; do
# interface is managed statically
elem_of "${IF}" "${INTERFACES}" && continue
# interface is not managed by udev
elem_of "${IF}" "${HOTPLUG_INTERFACES}" || continue
# ignore lo
[ "x${IF}" = "xlo" ] && continue
echo -n "${IF} "
done
done
echo ""
}
# get interfaces of running ifplugds for hotplug IFs
get_running_ifs() {
ps --no-headers -o args -C ifplugd | \
sed -e 's/.*-[[:alpha:]]*i[[:space:]]*\([^[:space:]]\+\).*/\1/' | \
filter_hotplug_ifs
}
# get all existing hotplug IFs
get_hotplug_ifs() {
local IFACES=""
for IF in /sys/class/net/*; do
echo "${IF##*/} "
done | filter_hotplug_ifs
}
# stop all ifplugd instances that where started by udev
# stop_udev_ifs <action>
stop_udev_ifs() {
local ACTION=$1
local IFACES
local IF
IFACES=`get_running_ifs`
# save list of interfaces we stop, so we can restart them
echo "${IFACES}" | save_state || true
for IF in ${IFACES}; do
if [ "x${ACTION}" = "xsuspend" ]; then
ifplugd -i ${IF} -S
else
ifplugd -i ${IF} -k
fi
# ifplugd started by udev doesn't take down the IF
/etc/ifplugd/ifplugd.action ${IF} down
done
}
# start ifplugd for all interfaces that were stopped by us
# start_udev_ifs <action>
start_udev_ifs() {
local ACTION=$1
local IFACES
local IF
# try to load list of interfaces
# if it can't be loaded, we just start all hotplug interfaces
IFACES=`load_state || get_hotplug_ifs`
for IF in ${IFACES}; do
if [ "x${ACTION}" = "xresume" ] && ifplugd -i ${IF} -c; then
ifplugd -i ${IF} -R
else
# start ifplugd just as udev would
INTERFACE=${IF} ACTION=add /lib/udev/ifplugd.agent
fi
done
}
case "$1" in
hibernate|suspend|suspend_hybrid)
/etc/init.d/ifplugd ${SUSPEND_ACTION}
stop_udev_ifs ${SUSPEND_ACTION}
;;
thaw|resume)
if [ "x$2" != "xstandby" ]; then
start_udev_ifs ${RESUME_ACTION}
/etc/init.d/ifplugd ${RESUME_ACTION}
fi
;;
*) exit 1
;;
esac
exit 0
