146 lines
3.8 KiB
Bash
146 lines
3.8 KiB
Bash
#!/usr/bin/env bash
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# Test the current package under a different kernel.
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# Requires virtme and qemu to be installed.
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# Examples:
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# Run all tests on a 5.4 kernel
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# $ ./run-tests.sh 5.4
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# Run a subset of tests:
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# $ ./run-tests.sh 5.4 ./link
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set -euo pipefail
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script="$(realpath "$0")"
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readonly script
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# This script is a bit like a Matryoshka doll since it keeps re-executing itself
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# in various different contexts:
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#
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# 1. invoked by the user like run-tests.sh 5.4
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# 2. invoked by go test like run-tests.sh --exec-vm
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# 3. invoked by init in the vm like run-tests.sh --exec-test
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#
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# This allows us to use all available CPU on the host machine to compile our
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# code, and then only use the VM to execute the test. This is because the VM
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# is usually slower at compiling than the host.
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if [[ "${1:-}" = "--exec-vm" ]]; then
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shift
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input="$1"
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shift
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# Use sudo if /dev/kvm isn't accessible by the current user.
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sudo=""
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if [[ ! -r /dev/kvm || ! -w /dev/kvm ]]; then
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sudo="sudo"
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fi
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readonly sudo
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testdir="$(dirname "$1")"
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output="$(mktemp -d)"
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printf -v cmd "%q " "$@"
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if [[ "$(stat -c '%t:%T' -L /proc/$$/fd/0)" == "1:3" ]]; then
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# stdin is /dev/null, which doesn't play well with qemu. Use a fifo as a
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# blocking substitute.
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mkfifo "${output}/fake-stdin"
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# Open for reading and writing to avoid blocking.
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exec 0<> "${output}/fake-stdin"
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rm "${output}/fake-stdin"
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fi
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for ((i = 0; i < 3; i++)); do
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if ! $sudo virtme-run --kimg "${input}/bzImage" --memory 768M --pwd \
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--rwdir="${testdir}=${testdir}" \
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--rodir=/run/input="${input}" \
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--rwdir=/run/output="${output}" \
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--script-sh "PATH=\"$PATH\" CI_MAX_KERNEL_VERSION="${CI_MAX_KERNEL_VERSION:-}" \"$script\" --exec-test $cmd" \
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--kopt possible_cpus=2; then # need at least two CPUs for some tests
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exit 23
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fi
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if [[ -e "${output}/status" ]]; then
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break
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fi
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if [[ -v CI ]]; then
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echo "Retrying test run due to qemu crash"
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continue
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fi
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exit 42
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done
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rc=$(<"${output}/status")
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$sudo rm -r "$output"
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exit $rc
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elif [[ "${1:-}" = "--exec-test" ]]; then
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shift
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mount -t bpf bpf /sys/fs/bpf
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mount -t tracefs tracefs /sys/kernel/debug/tracing
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if [[ -d "/run/input/bpf" ]]; then
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export KERNEL_SELFTESTS="/run/input/bpf"
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fi
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if [[ -f "/run/input/bpf/bpf_testmod/bpf_testmod.ko" ]]; then
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insmod "/run/input/bpf/bpf_testmod/bpf_testmod.ko"
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fi
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dmesg --clear
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rc=0
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"$@" || rc=$?
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dmesg
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echo $rc > "/run/output/status"
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exit $rc # this return code is "swallowed" by qemu
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fi
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readonly kernel_version="${1:-}"
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if [[ -z "${kernel_version}" ]]; then
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echo "Expecting kernel version as first argument"
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exit 1
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fi
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shift
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readonly kernel="linux-${kernel_version}.bz"
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readonly selftests="linux-${kernel_version}-selftests-bpf.tgz"
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readonly input="$(mktemp -d)"
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readonly tmp_dir="${TMPDIR:-/tmp}"
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readonly branch="${BRANCH:-master}"
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fetch() {
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echo Fetching "${1}"
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pushd "${tmp_dir}" > /dev/null
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curl -s -L -O --fail --etag-compare "${1}.etag" --etag-save "${1}.etag" "https://github.com/cilium/ci-kernels/raw/${branch}/${1}"
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local ret=$?
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popd > /dev/null
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return $ret
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}
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fetch "${kernel}"
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cp "${tmp_dir}/${kernel}" "${input}/bzImage"
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if fetch "${selftests}"; then
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echo "Decompressing selftests"
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mkdir "${input}/bpf"
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tar --strip-components=4 -xf "${tmp_dir}/${selftests}" -C "${input}/bpf"
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else
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echo "No selftests found, disabling"
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fi
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args=(-short -coverpkg=./... -coverprofile=coverage.out -count 1 ./...)
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if (( $# > 0 )); then
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args=("$@")
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fi
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export GOFLAGS=-mod=readonly
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export CGO_ENABLED=0
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# LINUX_VERSION_CODE test compares this to discovered value.
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export KERNEL_VERSION="${kernel_version}"
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echo Testing on "${kernel_version}"
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go test -exec "$script --exec-vm $input" "${args[@]}"
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echo "Test successful on ${kernel_version}"
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rm -r "${input}"
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