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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
if out=$("$@"); then
echo -n "$out"
return 0
fi
local current_time="$(date -u +%s%3N)"
if ((current_time - start_time > timeout)); then
echo -n "$out"
return 1
fi
done
}
cleanup_ns()
{
local ns=""
local ret=0
for ns in "$@"; do
[ -z "${ns}" ] && continue
ip netns pids "${ns}" 2> /dev/null | xargs -r kill || true
ip netns delete "${ns}" &> /dev/null || true
if ! busywait $BUSYWAIT_TIMEOUT ip netns list \| grep -vq "^$ns$" &> /dev/null; then
echo "Warn: Failed to remove namespace $ns"
ret=1
fi
done
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=()
local ns_exist=
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"
ns_exist=false
else
eval ns='$'${ns_name}
cleanup_ns "$ns"
ns_exist=true
fi
if ! ip netns add "$ns"; then
echo "Failed to create namespace $ns_name"
cleanup_ns "${ns_list[@]}"
return $ksft_skip
fi
ip -n "$ns" link set lo up
! $ns_exist && ns_list+=("$ns")
done
NS_LIST+=("${ns_list[@]}")
}
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