1#!/bin/bash -e 2# SPDX-License-Identifier: GPL-2.0 3# 4# This test checks that the network buffer sysctls are present 5# in a network namespaces, and that they are readonly. 6 7source lib.sh 8 9cleanup() { 10 cleanup_ns $test_ns 11} 12 13trap cleanup EXIT 14 15fail() { 16 echo "ERROR: $*" >&2 17 exit 1 18} 19 20setup_ns test_ns 21 22for sc in {r,w}mem_{default,max}; do 23 # check that this is writable in a netns 24 [ -w "/proc/sys/net/core/$sc" ] || 25 fail "$sc isn't writable in the init netns!" 26 27 # change the value in the host netns 28 sysctl -qw "net.core.$sc=300000" || 29 fail "Can't write $sc in init netns!" 30 31 # check that the value is read from the init netns 32 [ "$(ip netns exec $test_ns sysctl -n "net.core.$sc")" -eq 300000 ] || 33 fail "Value for $sc mismatch!" 34 35 # check that this isn't writable in a netns 36 ip netns exec $test_ns [ -w "/proc/sys/net/core/$sc" ] && 37 fail "$sc is writable in a netns!" 38done 39 40echo 'Test passed OK' 41