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#!/bin/bash
# SPDX-License-Identifier: GPL-2.0
##############################################################################
# Defines
: "${WAIT_TIMEOUT:=20}"
BUSYWAIT_TIMEOUT=$((WAIT_TIMEOUT * 1000)) # ms
# Kselftest framework constants.
ksft_pass=0
ksft_fail=1
ksft_xfail=2
ksft_skip=4
# namespace list created by setup_ns
NS_LIST=()
##############################################################################
# Helpers
__ksft_status_merge()
{
local a=$1; shift
local b=$1; shift
local -A weights
local weight=0
local i
for i in "$@"; do
weights[$i]=$((weight++))
done
if [[ ${weights[$a]} > ${weights[$b]} ]]; then
echo "$a"
return 0
else
echo "$b"
return 1
fi
}
ksft_status_merge()
{
local a=$1; shift
local b=$1; shift
__ksft_status_merge "$a" "$b" \
$ksft_pass $ksft_xfail $ksft_skip $ksft_fail
}
ksft_exit_status_merge()
{
local a=$1; shift
local b=$1; shift
__ksft_status_merge "$a" "$b" \
$ksft_xfail $ksft_pass $ksft_skip $ksft_fail
}
loopy_wait()
{
local sleep_cmd=$1; shift
local timeout_ms=$1; shift
local start_time="$(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_ms)); then
echo -n "$out"
return 1
fi
$sleep_cmd
done
}
busywait()
{
local timeout_ms=$1; shift
loopy_wait : "$timeout_ms" "$@"
}
# timeout in seconds
slowwait()
{
local timeout_sec=$1; shift
loopy_wait "sleep 0.1" "$((timeout_sec * 1000))" "$@"
}
until_counter_is()
{
local expr=$1; shift
local current=$("$@")
echo $((current))
((current $expr))
}
busywait_for_counter()
{
local timeout=$1; shift
local delta=$1; shift
local base=$("$@")
busywait "$timeout" until_counter_is ">= $((base + delta))" "$@"
}
slowwait_for_counter()
{
local timeout=$1; shift
local delta=$1; shift
local base=$("$@")
slowwait "$timeout" until_counter_is ">= $((base + delta))" "$@"
}
# Check for existence of tools which are built as part of selftests
# but may also already exist in $PATH
check_gen_prog()
{
local prog_name=$1; shift
if ! which $prog_name >/dev/null 2>/dev/null; then
PATH=$PWD:$PATH
if ! which $prog_name >/dev/null; then
echo "'$prog_name' command not found; skipping tests"
exit $ksft_skip
fi
fi
}
remove_ns_list()
{
local item=$1
local ns
local ns_list=("${NS_LIST[@]}")
NS_LIST=()
for ns in "${ns_list[@]}"; do
if [ "${ns}" != "${item}" ]; then
NS_LIST+=("${ns}")
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 $ns"
ret=1
else
remove_ns_list "${ns}"
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_name=""
local ns_list=()
for ns_name in "$@"; do
# avoid conflicts with local var: internal error
if [ "${ns_name}" = "ns_name" ]; then
echo "Failed to setup namespace '${ns_name}': invalid name"
cleanup_ns "${ns_list[@]}"
exit $ksft_fail
fi
# Some test may setup/remove same netns multi times
if [ -z "${!ns_name}" ]; then
eval "${ns_name}=${ns_name,,}-$(mktemp -u XXXXXX)"
else
cleanup_ns "${!ns_name}"
fi
if ! ip netns add "${!ns_name}"; then
echo "Failed to create namespace $ns_name"
cleanup_ns "${ns_list[@]}"
return $ksft_skip
fi
ip -n "${!ns_name}" link set lo up
ns_list+=("${!ns_name}")
done
NS_LIST+=("${ns_list[@]}")
}
tc_rule_stats_get()
{
local dev=$1; shift
local pref=$1; shift
local dir=${1:-ingress}; shift
local selector=${1:-.packets}; shift
tc -j -s filter show dev $dev $dir pref $pref \
| jq ".[1].options.actions[].stats$selector"
}
tc_rule_handle_stats_get()
{
local id=$1; shift
local handle=$1; shift
local selector=${1:-.packets}; shift
local netns=${1:-""}; shift
tc $netns -j -s filter show $id \
| jq ".[] | select(.options.handle == $handle) | \
.options.actions[0].stats$selector"
}
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