fourcentsshy wrote:
>
> Hello,
>
> I'm using tc to limit the bandwidth of our wireless customers. I have a
> working script, but I'm not happy with it. I'm trying to write a more
> sophisticated script, but when I run it, it give me this error:
>
> RTNETLINK answers: File exists
>
> I have no idea what this error means or how to fix it.
It means pretty much what it says. There is already a record matching
closely enough that it is duplicated.
> Here is a portion
> of the script (the whole script shapes several interfaces):
>
> IDEV='eth5'
> TC='/sbin/tc'
> IPS='/etc/sysconfig/shaper/shape.ips'
> # high priority destination ports - I'll fill these in later (when this
> # thing works)
> HIGHPORT=
> # low priority destination ports
> LOWPORT=
>
> $TC qdisc add dev $IDEV root handle 1: cbq bandwidth 1600Kbit cell 8\
> avpkt 1000 mpu 64
> $TC class add dev $IDEV parent 1: classid 1:1 est 1sec 8sec cbq\
> bandwidth 1600Kbit rate 1500kbit allot 1514 maxburst 20 avpkt 1000\
> prio 0 bounded isolated
>
> cat $IPS | sed -e 's/#.*$//; s/^ *$//;' | while read IP RATE STATUS; do
> if [ "x$IP" == "x" ]; then
> continue
> fi
>
> # I use the last byte of the customer's IP's for the handle, which range
> # from 76 to 135 ATM.
>
> HANDLE="${IP##*.}"
>
> # I get the error from the next line. Because it fails to create the
> # qdisc all the rest fail too.
>
> $TC qdisc add dev $IDEV parent 1:1 handle 1:$HANDLE cbq\
> bandwidth 1600Kbit cell 8 avpkt 1000 mpu 64
>
> $TC class add dev $IDEV parent 1:$HANDLE classid $HANDLE:\
> est 1sec 8sec cbq bandwidth 1600Kbit rate ${RATE}kbit allot 1514\
> maxburst 20 avpkt 1000 prio 1 bounded isolated
> $TC class add dev $IDEV parent $HANDLE: classid $HANDLE:1\
> est 1sec 8sec cbq bandwidth 1600Kbit rate ${RATE}kbit allot 1514\
> maxburst 20 avpkt 1000 prio 2
> $TC class add dev $IDEV parent $HANDLE: classid $HANDLE:2 est 1sec\
> 8sec cbq bandwidth 1600Kbit rate $[9*$RATE/10]kbit allot 1514\
> maxburst 20 avpkt 1000 prio 3
> $TC class add dev $IDEV parent $HANDLE: classid $HANDLE:3 est 1sec\
> 8sec cbq bandwidth 1600Kbit rate $[8*$RATE/10]kbit allot 1514\
> maxburst 20 avpkt 1000 prio 4
> $TC qdisc add dev $IDEV parent $HANDLE:1 sfq quantum 1514b\
> perturb 15
> $TC qdisc add dev $IDEV parent $HANDLE:2 sfq quantum 1514b\
> perturb 15
> $TC qdisc add dev $IDEV parent $HANDLE:3 sfq quantum 1514b\
> perturb 15
> $TC filter add dev $IDEV parent 1: protocol ip prio 16\
> u32 match ip src $IP flowid $HANDLE:
> $TC filter add dev $IDEV parent $HANDLE: protocol ip prio 10\
> u32 match ip tos 0x10 0xff flowid $HANDLE:1
> $TC filter add dev $IDEV parent $HANDLE: protocol ip prio 11\
> u32 match ip protocol 1 0xff flowid $HANDLE:1
> $TC filter add dev $IDEV parent $HANDLE: protocol ip prio 12\
> u32 match ip protocol 6 0xff match u8 0x05 0x0f at 0 match u16\
> 0x0000 0xffc0 at 2 flowid $HANDLE:1
>
> for a in $HIGHPORT; do
> $TC filter add dev $IDEV parent 1:0 protocol ip prio 14\
> u32 match ip dport $a 0xffff flowid $HANDLE:1
> done
> for a in $LOWPORT; do
> $TC filter add dev $IDEV parent 1:0 protocol ip prio 16\
> u32 match ip dport $a 0xffff flowid $HANDLE:3
> done
> $TC filter add dev $IDEV parent 1:0 protocol ip prio 15\
> u32 match ip dst 0.0.0.0/0 flowid $HANDLE:2
> done
>
> There are bound to other problems with this script, but until I can get
> past the current one, I'm dead in the water. TIA
You do not say which line or lines is causing the error so this is a
guess.
Run `tc -s filter show dev $IDEV' sending the output to a file because
there will be a lot of it. I think you will find a ton of "duplicate"
filters.
Set prio to the same value (16 or 10 perhaps) for each and every line in
your `$TC filter' lines.
--
gypsy
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