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#! /bin/bash
# SPDX-License-Identifier: GPL-2.0
readonly KSFT_FAIL=1
readonly KSFT_SKIP=4
# SELFTESTS_MPTCP_LIB_EXPECT_ALL_FEATURES env var can be set when validating all
# features using the last version of the kernel and the selftests to make sure
# a test is not being skipped by mistake.
mptcp_lib_expect_all_features() {
[ "${SELFTESTS_MPTCP_LIB_EXPECT_ALL_FEATURES:-}" = "1" ]
}
# $1: msg
mptcp_lib_fail_if_expected_feature() {
if mptcp_lib_expect_all_features; then
echo "ERROR: missing feature: ${*}"
exit ${KSFT_FAIL}
fi
return 1
}
# $1: file
mptcp_lib_has_file() {
local f="${1}"
if [ -f "${f}" ]; then
return 0
fi
mptcp_lib_fail_if_expected_feature "${f} file not found"
}
mptcp_lib_check_mptcp() {
if ! mptcp_lib_has_file "/proc/sys/net/mptcp/enabled"; then
echo "SKIP: MPTCP support is not available"
exit ${KSFT_SKIP}
fi
}
mptcp_lib_check_kallsyms() {
if ! mptcp_lib_has_file "/proc/kallsyms"; then
echo "SKIP: CONFIG_KALLSYMS is missing"
exit ${KSFT_SKIP}
fi
}
# Internal: use mptcp_lib_kallsyms_has() instead
__mptcp_lib_kallsyms_has() {
local sym="${1}"
mptcp_lib_check_kallsyms
grep -q " ${sym}" /proc/kallsyms
}
# $1: part of a symbol to look at, add '$' at the end for full name
mptcp_lib_kallsyms_has() {
local sym="${1}"
if __mptcp_lib_kallsyms_has "${sym}"; then
return 0
fi
mptcp_lib_fail_if_expected_feature "${sym} symbol not found"
}
# $1: part of a symbol to look at, add '$' at the end for full name
mptcp_lib_kallsyms_doesnt_have() {
local sym="${1}"
if ! __mptcp_lib_kallsyms_has "${sym}"; then
return 0
fi
mptcp_lib_fail_if_expected_feature "${sym} symbol has been found"
}
# !!!AVOID USING THIS!!!
# Features might not land in the expected version and features can be backported
#
# $1: kernel version, e.g. 6.3
mptcp_lib_kversion_ge() {
local exp_maj="${1%.*}"
local exp_min="${1#*.}"
local v maj min
# If the kernel has backported features, set this env var to 1:
if [ "${SELFTESTS_MPTCP_LIB_NO_KVERSION_CHECK:-}" = "1" ]; then
return 0
fi
v=$(uname -r | cut -d'.' -f1,2)
maj=${v%.*}
min=${v#*.}
if [ "${maj}" -gt "${exp_maj}" ] ||
{ [ "${maj}" -eq "${exp_maj}" ] && [ "${min}" -ge "${exp_min}" ]; }; then
return 0
fi
mptcp_lib_fail_if_expected_feature "kernel version ${1} lower than ${v}"
}
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