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#!/bin/bash -e
# SPDX-License-Identifier: GPL-2.0
#
# This test checks that the network buffer sysctls are present
# in a network namespaces, and that they are readonly.
source lib.sh
cleanup() {
cleanup_ns $test_ns
}
trap cleanup EXIT
fail() {
echo "ERROR: $*" >&2
exit 1
}
setup_ns test_ns
for sc in {r,w}mem_{default,max}; do
# check that this is writable in a netns
[ -w "/proc/sys/net/core/$sc" ] ||
fail "$sc isn't writable in the init netns!"
# change the value in the host netns
sysctl -qw "net.core.$sc=300000" ||
fail "Can't write $sc in init netns!"
# check that the value is read from the init netns
[ "$(ip netns exec $test_ns sysctl -n "net.core.$sc")" -eq 300000 ] ||
fail "Value for $sc mismatch!"
# check that this isn't writable in a netns
ip netns exec $test_ns [ -w "/proc/sys/net/core/$sc" ] &&
fail "$sc is writable in a netns!"
done
echo 'Test passed OK'
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