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