29 lines
1.3 KiB
Bash
29 lines
1.3 KiB
Bash
# Copyright 2016 6WIND S.A.
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#
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#!/bin/bash
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TAP_IFACE=$(ip link | grep tap | awk '{print $2}' | sed 's#:##' | tail -n1)
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NB_TAP_PACKETS_BEFORE=$(cat /tmp/6WIND_va_nb_tap_before)
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NB_FP_VSWITCH_PACKETS_BEFORE=$(cat /tmp/6WIND_va_fp_vswitch_before)
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NB_EXCEPTIONS_BEFORE=$(cat /tmp/6WIND_va_nb_exc_before)
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NB_TAP_PACKETS_AFTER=$(ethtool -S $TAP_IFACE | grep rx.good_packets | awk '{print $2}')
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NB_FP_VSWITCH_PACKETS_AFTER=$(fp-cli dump-stats | grep output_ok | sed 's#:# ##' | awk '{print $2}')
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NB_EXCEPTIONS_AFTER=$(fp-cli dump-stats | grep LocalBasicExceptions | sed 's#:# ##' | awk '{print $2}')
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NB_TAP_PACKETS=$(expr $NB_TAP_PACKETS_AFTER - $NB_TAP_PACKETS_BEFORE)
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NB_FP_VSWITCH_PACKETS=$(expr $NB_FP_VSWITCH_PACKETS_AFTER - $NB_FP_VSWITCH_PACKETS_BEFORE)
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NB_EXCEPTIONS=$(expr $NB_EXCEPTIONS_AFTER - $NB_EXCEPTIONS_BEFORE)
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# Here we verify 2 things.
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# The first check wants to assure that the packets received by the spawned vm
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# were processed by 6WIND virtual accelerator and not sent to slow path (exception).
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# The second check wants to assure that this traffic towards the vm correctly
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# passed via the accelerated ovs.
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# This is a simple heuristics but it should be enough.
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if [[ ${NB_EXCEPTIONS} -lt ${NB_TAP_PACKETS} && ${NB_TAP_PACKETS} -le ${NB_FP_VSWITCH_PACKETS} ]]; then
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exit 0
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fi
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exit 1
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