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#!/bin/sh
#
# If transparent VF is enabled, don't do anything.
#
sysctl -n hw.hn.vf_transparent > /dev/null 2>&1
if [ $? -ne 0 ]
then
# Old kernel; no transparent VF.
vf_transparent=0
else
vf_transparent=`sysctl -n hw.hn.vf_transparent`
fi
if [ $vf_transparent -ne 0 ]
then
# Transparent VF; done!
exit 0
fi
iface=$1
delay=$2
if [ $delay -gt 0 ]
then
#
# Delayed VF up.
#
sleep $delay
ifconfig $iface up
# Done!
exit $?
fi
#
# Check to see whether $iface is a VF or not.
# If $iface is a VF, bring it up now.
#
# for hyperv_vf_delay
. /etc/rc.conf
sysctl -n hw.hn.vflist > /dev/null 2>&1
if [ $? -ne 0 ]
then
# Old kernel; nothing could be done properly.
exit 0
fi
vf_list=`sysctl -n hw.hn.vflist`
for vf in $vf_list
do
if [ $vf = $iface ]
then
#
# Linger a little bit (at least 2 seconds) mainly to
# make sure that $iface is fully attached.
#
# NOTE:
# In Azure hyperv_vf_delay should be configured to a
# large value, e.g. 120 seconds, to avoid racing cloud
# agent goofs.
#
test $hyperv_vf_delay -ge 2 > /dev/null 2>&1
if [ $? -ne 0 ]
then
hyperv_vf_delay=2
fi
#
# NOTE:
# "(sleep ..; ifconfig .. up) > /dev/null 2>&1 &"
# does _not_ work.
#
daemon -f /usr/libexec/hyperv/hyperv_vfattach \
$iface $hyperv_vf_delay
break
fi
done
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