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#!/bin/sh
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License version 2 as
# published by the Free Software Foundation.
#
# Copyright (C) 2012-4 Michael D. Taht, Toke Høiland-Jørgensen, Sebastian Moeller
. /lib/functions.sh
STOP=
ACTIVE_STATE_PREFIX="SQM_active_on_"
ACTIVE_STATE_FILE_DIR="/var/run/SQM"
mkdir -p ${ACTIVE_STATE_FILE_DIR}
START_ON_IF=$2 # only process this interface
# TODO if $2 is empty select all interfaces with running sqm instance
if [ -z ${START_ON_IF} ] ;
then
# find all interfaces with active sqm instance
logger -t SQM -s "Trying to start/stop SQM on all interfaces."
PROTO_STATE_FILE_LIST=$( ls ${ACTIVE_STATE_FILE_DIR}/${ACTIVE_STATE_PREFIX}* 2> /dev/null )
else
# only try to restart the just hotplugged interface, so reduce the list of interfaces to stop to the specified one
logger -t SQM -s "Trying to start/stop SQM on interface ${START_ON_IF}"
PROTO_STATE_FILE_LIST=${ACTIVE_STATE_FILE_DIR}/${ACTIVE_STATE_PREFIX}${START_ON_IF}
fi
case ${1} in
start)
# just run through, same as passing no argument
;;
stop)
logger -t SQM -s "run.sh stop"
STOP=$1
;;
esac
# the current uci config file does not necessarily contain sections for all interfaces with active
# SQM instances, so use the ACTIVE_STATE_FILES to detect the interfaces on which to stop SQM.
# Currently the .qos scripts start with stopping any existing traffic shaping so this should not
# effectively change anything...
for STATE_FILE in ${PROTO_STATE_FILE_LIST} ; do
if [ -f ${STATE_FILE} ] ;
then
STATE_FILE_BASE_NAME=$( basename ${STATE_FILE} )
CURRENT_INTERFACE=${STATE_FILE_BASE_NAME:${#ACTIVE_STATE_PREFIX}:$(( ${#STATE_FILE_BASE_NAME} - ${#ACTIVE_STATE_PREFIX} ))}
logger -t SQM -s "${0} Stopping SQM on interface: ${CURRENT_INTERFACE}"
/usr/lib/sqm/stop.sh ${CURRENT_INTERFACE}
rm ${STATE_FILE} # well, we stop it so it is not running anymore and hence no active state file needed...
fi
done
config_load sqm
run_simple_qos() {
local section="$1"
export IFACE=$(config_get "$section" interface)
# If called explicitly for one interface only , so ignore anything else
[ -n "${START_ON_IF}" -a "$START_ON_IF" != "$IFACE" ] && return
#logger -t SQM -s "marching on..."
ACTIVE_STATE_FILE_FQN="${ACTIVE_STATE_FILE_DIR}/${ACTIVE_STATE_PREFIX}${IFACE}" # this marks interfaces as active with SQM
[ -f "${ACTIVE_STATE_FILE_FQN}" ] && logger -t SQM -s "Uh, oh, ${ACTIVE_STATE_FILE_FQN} should already be stopped." # Not supposed to happen
if [ $(config_get "$section" enabled) -ne 1 ];
then
if [ -f "${ACTIVE_STATE_FILE_FQN}" ];
then
# this should not be possible, delete after testing
local SECTION_STOP="stop" # it seems the user just de-selected enable, so stop the active SQM
else
logger -t SQM -s "${0} SQM for interface ${IFACE} is not enabled, skipping over..."
return 0 # since SQM is not active on the current interface nothing to do here
fi
fi
export UPLINK=$(config_get "$section" upload)
export DOWNLINK=$(config_get "$section" download)
export LLAM=$(config_get "$section" linklayer_adaptation_mechanism)
export LINKLAYER=$(config_get "$section" linklayer)
export OVERHEAD=$(config_get "$section" overhead)
export STAB_MTU=$(config_get "$section" tcMTU)
export STAB_TSIZE=$(config_get "$section" tcTSIZE)
export STAB_MPU=$(config_get "$section" tcMPU)
export ILIMIT=$(config_get "$section" ilimit)
export ELIMIT=$(config_get "$section" elimit)
export ITARGET=$(config_get "$section" itarget)
export ETARGET=$(config_get "$section" etarget)
export IECN=$(config_get "$section" ingress_ecn)
export EECN=$(config_get "$section" egress_ecn)
export IQDISC_OPTS=$(config_get "$section" iqdisc_opts)
export EQDISC_OPTS=$(config_get "$section" eqdisc_opts)
export TARGET=$(config_get "$section" target)
export SQUASH_DSCP=$(config_get "$section" squash_dscp)
export SQUASH_INGRESS=$(config_get "$section" squash_ingress)
export QDISC=$(config_get "$section" qdisc)
export SCRIPT=/usr/lib/sqm/$(config_get "$section" script)
# # there should be nothing left to stop, so just avoid calling the script
if [ "$STOP" == "stop" -o "$SECTION_STOP" == "stop" ];
then
# /usr/lib/sqm/stop.sh
# [ -f ${ACTIVE_STATE_FILE_FQN} ] && rm ${ACTIVE_STATE_FILE_FQN} # conditional to avoid errors ACTIVE_STATE_FILE_FQN does not exist anymore
# $(config_set "$section" enabled 0) # this does not save to the config file only to the loaded memory representation
logger -t SQM -s "${0} SQM qdiscs on ${IFACE} removed"
return 0
fi
# in case of spurious hotplug events, try double check whether the interface is really up
if [ ! -d /sys/class/net/${IFACE} ] ;
then
echo "${IFACE} does currently not exist, not even trying to start SQM on nothing." > /dev/kmsg
logger -t SQM -s "${IFACE} does currently not exist, not even trying to start SQM on nothing."
return 0
fi
logger -t SQM -s "${0} Queue Setup Script: ${SCRIPT}"
[ -x "$SCRIPT" ] && { $SCRIPT ; touch ${ACTIVE_STATE_FILE_FQN}; }
}
config_foreach run_simple_qos