Limitando largura de banda com o CBQ
Publicado por Romulo 23/09/2003
[ Hits: 45.306 ]
Script usado para limitar largura de banda com o CBQ.
#!/bin/sh PATH="/bin:/sbin:/usr/bin:/usr/sbin" CBQ_PATH="/etc/sysconfig/cbq" ### Uncomment for debugging #LOG_FILE="/var/run/cbq-$1" if [ -n "$LOG_FILE" ]; then ### Initialize log file echo "# `date`" > $LOG_FILE ### Logging equivalent of "ip" command ip () { [ -z "$LOG_FILE" ] && { /sbin/ip "$@"; return; } echo -e "\nip $@\n" >> $LOG_FILE /sbin/ip "$@" 2>&1 | tee -a $LOG_FILE } # ip ### Logging equivalent of "tc" command tc () { [ -z "$LOG_FILE" ] && { /sbin/tc "$@"; return; } echo -e "\ntc $@\n" >> $LOG_FILE /sbin/tc "$@" 2>&1 | tee -a $LOG_FILE } # tc fi # command logging ### Remove CBQ from all devices cbq_off () { for dev in `ip link| sed -n '/^[0-9]/ { s/^[0-9]\+: \([a-z0-9]\+\)[:@].*/\1/; p; }'`; do cbq_device_off $dev done return } # cbq_off ### Remove root class from device $1 cbq_device_off () { tc qdisc del dev $1 root &>/dev/null return } # cbq_device_off ### Display CBQ setup cbq_show () { for dev in $DEVICES; do echo ---[ $dev: configured classes ]--------------------------- echo; tc $1 class show dev $dev; echo echo ---[ $dev: queueing disciplines ]------------------------- echo; tc $1 qdisc show dev $dev; echo done } # cbq_show ### Check configuration and load DEVFIELDS/CLASSLIST cbq_init () { ### Check configuration in $CBQ_PATH directory and get CLASSLIST CLASSLIST=`find $CBQ_PATH -name 'cbq-*' -maxdepth 1 -printf "%f\n"| sort` if [ -z "$CLASSLIST" ]; then echo "**CBQ: not configured in $CBQ_PATH!" exit fi ### Collect all DEVICE fields from $CBQ_PATH/cbq-* DEVFIELDS=`find $CBQ_PATH -name 'cbq-*' -maxdepth 1 -exec sed -ne\ 's/#.*//; s/ //g; /^DEVICE=.*,.*,.*/ { s/.*=//; p; q; }; \ /^DEVICE=/ q' {} \;| sort -u` ### Check if there are any devices to set up if [ -z "$DEVFIELDS" ]; then echo "**CBQ: can't find any DEVICE field in $CBQ_PATH/cbq-*!" exit fi ### Extract all device names from DEVICE fields in $CBQ_PATH/cbq-* DEVICES=`echo "$DEVFIELDS"| sed 's/,.*//'| sort -u` ### Check for multiple devices with different DEVICE fields if [ `echo "$DEVICES"| wc -l` -ne `echo "$DEVFIELDS"| wc -l` ]; then echo "**CBQ: multiple different DEVICE fields for one device found!" echo "$DEVFIELDS" exit fi } # cbq_init ### Load class configuration from file $1 cbq_load_class () { CNAME="$CBQ_PATH/$1" CFILE=`sed -e 's/#.*//; s/ //g; /^$/ d' $CNAME` CLASS=`echo $1| sed 's/^cbq-0*//; s/\..*//'` if [ `/usr/bin/printf "%d" 0x$CLASS` -le 1 ]; then echo "**CBQ: class ID of $1 must be > 1!" cbq_off exit fi ### Device parameters DEVICE=`echo "$CFILE"| sed -n '/^DEVICE=/ { s/.*=//; s/,.*//; p; q; }'` BANDWIDTH=`echo "$DEVFIELDS"| sed -n "/^$DEVICE,/ { s/.*,\(.*\),.*/\1/; p; q; }"` ### Class parameters CLASSID="1:$CLASS" PARENT=`echo "$CFILE"| sed -n '/^PARENT=/ { s/.*=0*//; p; q; }'` [ -z "$PARENT" ] && PARENT="1:1" || PARENT="1:$PARENT" LEAF=`echo "$CFILE"| sed -n '/^LEAF=/ { s/.*=//; p; q; }'` [ -z "$LEAF" ] && LEAF="tbf" BOUNDED=`echo "$CFILE"| sed -n '/^BOUNDED=/ { s/.*=//; p; q; }'` [ "$BOUNDED" = "no" ] && BOUNDED="" || BOUNDED="bounded" ISOLATED=`echo "$CFILE"| sed -n '/^ISOLATED=/ { s/.*=//; p; q; }'` [ "$ISOLATED" = "yes" ] && ISOLATED="isolated" || ISOLATED="" PRIO=`echo "$CFILE"| sed -n '/^PRIO=/ { s/.*=//; p; q; }'` RATE=`echo "$CFILE"| sed -n '/^RATE=/ { s/.*=//; p; q; }'` WEIGHT=`echo "$CFILE"| sed -n '/^WEIGHT=/ { s/.*=//; p; q; }'` if [ -z "$RATE" -o -z "$WEIGHT" -o -z "$PRIO" ]; then echo "**CBQ: missing RATE, WEIGHT or PRIO field(s) in $1!" cbq_off exit fi ### Leaf qdisc parameters for TBF if [ "$LEAF" = "tbf" ]; then BUFFER=`echo "$CFILE"| sed -n '/^BUFFER=/ { s/.*=//; p; q; }'` [ -z "$BUFFER" ] && BUFFER="10Kb/8" LIMIT=`echo "$CFILE"| sed -n '/^LIMIT=/ { s/.*=//; p; q; }'` [ -z "$LIMIT" ] && LIMIT="15Kb" PEAK=`echo "$CFILE"| sed -n '/^PEAK=/ { s/.*=//; p; q; }'` [ -n "$PEAK" ] && PEAK="peakrate $PEAK" MTU=`echo "$CFILE"| sed -n '/^MTU=/ { s/.*=//; p; q; }'` [ -z "$MTU" ] && MTU="1500" elif [ "$LEAF" = "sfq" ]; then PERTURB=`echo "$CFILE"| sed -n '/^PERTURB=/ { s/.*=//; p; q; }'` [ -n "$PERTURB" ] && PERTURB="perturb $PERTURB" QUANTUM=`echo "$CFILE"| sed -n '/^QUANTUM=/ { s/.*=//; p; q; }'` [ -n "$QUANTUM" ] && QUANTUM="quantum $QUANTUM" elif [ "$LEAF" = "cbq" ]; then echo "**CBQ: class $1, leaf qdisc CBQ not yet supported!" fi return 0 } # cbq_load_class ### Check if ip-route is installed if [ ! -f /sbin/tc -o ! -f /sbin/ip ]; then echo "**CBQ: ip-route2 utilities not installed!" exit fi ######################################################################## # See how were we called # ######################################################################## case "$1" in ### START ### start) ### If you have cbq, tbf and u32 compiled into kernel, comment it out for module in sch_cbq sch_tbf sch_sfq sch_prio cls_u32; do if ! modprobe $module; then echo "**CBQ: could not load module $module" exit fi done ######################################################################## # Get all devices from configuration files $CBQ_PATH/cbq-* # # and setup CBQ root classes for them (if it is possible). # ######################################################################## ### Load DEVICES, DEVFIELDS and CLASSLIST cbq_init ### Try to discover interface bandwidth from DEVICE ### field and if OK - setup root class for this one for dev in $DEVICES; do ### Retrieve device bandwidth and weight DEVTEMP=`echo "$DEVFIELDS"| sed -n "/^$dev,/ { s/.*,\(.*\),\(.*\)/\1,\2/; p; q; }"` DEVBWDT=${DEVTEMP%%,*} DEVWGHT=${DEVTEMP##*,} ### If correctly set and the device is up, setup root class if [ -n "$DEVBWDT" -a -n "$DEVWGHT" ]; then if ! ip link | grep -q "$dev[:@].*UP"; then echo "**CBQ: could not find device $dev! CBQ turned off." cbq_off exit fi ### Remove old root class from device cbq_device_off $dev ### Setup root class (queueing discipline) for device tc qdisc add dev $dev root handle 1:0 cbq \ bandwidth $DEVBWDT avpkt 1000 cell 8 ### Create parent class :1. Every shaper will use it as ### parent unless specified otherwise using PARENT=xxxx tc class add dev $dev parent 1:0 classid 1:1 cbq \ bandwidth $DEVBWDT rate $DEVBWDT weight $DEVWGHT \ prio 8 allot 1514 cell 8 maxburst 20 avpkt 1000 else echo "**CBQ: could not determine bandwidth or weight for device $dev!" echo "**CBQ: setup DEVICE field properly!" exit fi done # device ####################################################################### # Set up all classes described in $CBQ_PATH/cbq-* # ####################################################################### for classfile in $CLASSLIST; do cbq_load_class $classfile ### Create class and setup leaf qdisc tc class add dev $DEVICE parent $PARENT classid $CLASSID cbq \ bandwidth $BANDWIDTH rate $RATE weight $WEIGHT prio $PRIO \ allot 1514 cell 8 maxburst 20 avpkt 1000 $BOUNDED $ISOLATED ### Setup leaf queueing discipline if [ "$LEAF" = "tbf" ]; then tc qdisc add dev $DEVICE parent $CLASSID tbf \ rate $RATE buffer $BUFFER limit $LIMIT mtu $MTU $PEAK elif [ "$LEAF" = "sfq" ]; then tc qdisc add dev $DEVICE parent $CLASSID sfq \ $PERTURB $QUANTUM elif [ "$LEAF" = "cbq" ]; then : fi ### Create u32 filter for addresses specified by RULE fields RULESET=`echo "$CFILE"| sed -n '/^RULE/ { s/.*=//; p; }'` [ -z "$RULESET" ] && continue ### Rules present, parse them for rule in $RULESET; do u32_s=""; u32_d="" SADDR=""; SPORT="" ### Split up destination DST=${rule##*,} DADDR=${DST%%:*} [ "$DADDR" != "$DST" ] && DPORT=${DST##*:} || DPORT="" [ "$DADDR" = "*" ] && DADDR="" ### Split up source (if specified) if [ "$DST" != "$rule" ]; then SRC=${rule%%,*} SADDR=${SRC%%:*} [ "$SADDR" != "$SRC" ] && SPORT=${SRC##*:} [ "$SADDR" = "*" ] && SADDR="" fi ### Compose the u32 filter rules [ -n "$SPORT" ] && u32_s="match ip sport $SPORT 0xffff" [ -n "$SADDR" ] && u32_s="match ip src $SADDR $u32_s" [ -n "$DPORT" ] && u32_d="match ip dport $DPORT 0xffff" [ -n "$DADDR" ] && u32_d="match ip dst $DADDR $u32_d" ### Uncomment the following if you want to see parsed rules # echo "$rule: $u32_s $u32_d" ### Attach u32 filter to the appropriate class tc filter add dev $DEVICE parent 1:0 protocol ip \ prio 100 u32 $u32_s $u32_d flowid $CLASSID done ### rule done ### class file ;; ### TIMECHECK ### timecheck) ### Load DEVICES, DEVFIELDS and CLASSLIST cbq_init ### Current time in hh:mm format TIME_NOW=`date +%k:%M` TIME_ABS=$[${TIME_NOW%%:*}*60 + ${TIME_NOW##*:}] ### Check every config file for TIME parameter for classfile in $CLASSLIST; do TIMERATES=`sed -ne 's/#.*//; s/ //g; /^TIME/ { s/.*=//; p; }' $CBQ_PATH/$classfile` [ -z "$TIMERATES" ] && continue MATCH=0; CHANGE=0; for timerate in $TIMERATES; do ### Split up TIME parameter INTERVAL=${timerate%%;*}; PARAMS=${timerate##*;} BEG_TIME=${INTERVAL%%-*}; END_TIME=${INTERVAL##*-} ### Compute interval boundaries BEG_ABS=$[${BEG_TIME%%:*}*60 + ${BEG_TIME##*:}] END_ABS=$[${END_TIME%%:*}*60 + ${END_TIME##*:}] ### Midnight wrap fixup if [ $BEG_ABS -gt $END_ABS ]; then [ $TIME_ABS -le $END_ABS ] && TIME_ABS=$[TIME_ABS + 24*60] END_ABS=$[END_ABS + 24*60] fi ### If the time matches, remembers params and set flag if [ $TIME_ABS -ge $BEG_ABS -a $TIME_ABS -lt $END_ABS ]; then TMP_RATE=${PARAMS%%/*} TMP_WGHT=${PARAMS#*/} TMP_PEAK=${TMP_WGHT#*/} [ "$TMP_PEAK" = "$TMP_WGHT" ] && TMP_PEAK="" || TMP_WGHT={$TMP_WGHT%%/*} [ -n "$TMP_PEAK" ] && TMP_PEAK="peakrate $TMP_PEAK" MATCH=1 fi done ### timerate cbq_load_class $classfile ### Get current RATE of CBQ class RATE_NOW=`tc class show dev $DEVICE| sed -n \ "/cbq $CLASSID / { s/.*rate //; s/ .*//; p; q; }"` [ -z "$RATE_NOW" ] && continue ### Time interval match is found if [ $MATCH -ne 0 ]; then ### Check if there is any change in class RATE if [ "$RATE_NOW" != "$TMP_RATE" ]; then NEW_RATE="$TMP_RATE" NEW_WGHT="$TMP_WGHT" NEW_PEAK="$TMP_PEAK" CHANGE=1 fi ### Match not found, reset to default RATE if necessary elif [ "$RATE_NOW" != "$RATE" ]; then NEW_WGHT="$WEIGHT" NEW_RATE="$RATE" NEW_PEAK="$PEAK" CHANGE=1 fi ### If there's a change, replace CBQ class and leaf qdisc [ $CHANGE -ne 1 ] && continue ### Get leaf qdisc handle LEAF_HND=`tc class show dev $DEVICE| sed -n \ "/cbq $CLASSID .* leaf / { s/.*leaf //; s/ .*//; p; q; }"` [ -z "$LEAF_HND" ] && continue ### Replace CBQ class tc class replace dev $DEVICE classid $CLASSID cbq \ bandwidth $BANDWIDTH rate $NEW_RATE weight $NEW_WGHT prio $PRIO \ allot 1514 cell 8 maxburst 20 avpkt 1000 $BOUNDED $ISOLATED ### Replace leaf qdisc if [ "$LEAF" = "tbf" ]; then tc qdisc replace dev $DEVICE handle $LEAF_HND tbf \ rate $NEW_RATE buffer $BUFFER limit $LIMIT mtu $MTU $NEW_PEAK elif [ "$LEAF" = "sfq" ]; then ### SFQ does not support parameter changes ### yet so it does not need replacing #tc qdisc replace dev $DEVICE handle $LEAF_HND sfq \ #$PERTURB $QUANTUM : elif [ "$LEAF" = "cbq" ]; then : fi echo "**CBQ: $TIME_NOW: class $CLASS on $DEVICE changed rate ($RATE_NOW -> $NEW_RATE)" done ### class file 5 ;; ### STOP ### stop) cbq_off ;; ### RESTART ### restart) $0 stop $0 start ;; ### LIST ### list) cbq_init cbq_show ;; ### STATS ### stats) cbq_init cbq_show -s ;; ### default ### *) echo "Usage: " `basename $0` "{start|stop|restart|timecheck|list|stats}" esac
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