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#!/bin/bash
# SPDX-License-Identifier: GPL-2.0
##############################################################################
# Defines
WAIT_TIMEOUT=${WAIT_TIMEOUT:=20}
BUSYWAIT_TIMEOUT=$((WAIT_TIMEOUT * 1000)) # ms
# Kselftest framework requirement - SKIP code is 4.
ksft_skip=4
# namespace list created by setup_ns
NS_LIST=""
##############################################################################
# Helpers
busywait()
{
local timeout=$1; shift
local start_time="$(date -u +%s%3N)"
while true
do
local out
out=$("$@")
local ret=$?
if ((!ret)); then
echo -n "$out"
return 0
fi
local current_time="$(date -u +%s%3N)"
if ((current_time - start_time > timeout)); then
echo -n "$out"
return 1
fi
done
}
cleanup_ns()
{
local ns=""
local errexit=0
local ret=0
# disable errexit temporary
if [[ $- =~ "e" ]]; then
errexit=1
set +e
fi
for ns in "$@"; do
ip netns delete "${ns}" &> /dev/null
if ! busywait $BUSYWAIT_TIMEOUT ip netns list \| grep -vq "^$ns$" &> /dev/null; then
echo "Warn: Failed to remove namespace $ns"
ret=1
fi
done
[ $errexit -eq 1 ] && set -e
return $ret
}
cleanup_all_ns()
{
cleanup_ns $NS_LIST
}
# setup netns with given names as prefix. e.g
# setup_ns local remote
setup_ns()
{
local ns=""
local ns_name=""
local ns_list=""
for ns_name in "$@"; do
# Some test may setup/remove same netns multi times
if unset ${ns_name} 2> /dev/null; then
ns="${ns_name,,}-$(mktemp -u XXXXXX)"
eval readonly ${ns_name}="$ns"
else
eval ns='$'${ns_name}
cleanup_ns "$ns"
fi
if ! ip netns add "$ns"; then
echo "Failed to create namespace $ns_name"
cleanup_ns "$ns_list"
return $ksft_skip
fi
ip -n "$ns" link set lo up
ns_list="$ns_list $ns"
done
NS_LIST="$NS_LIST $ns_list"
}
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