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125 lines
3.2 KiB
Bash
125 lines
3.2 KiB
Bash
#!/bin/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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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=\"$PATH\" \"$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}/success" ]]; then
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exit 42
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fi
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$sudo rm -r "$output"
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exit 0
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elif [[ "${1:-}" = "--exec-test" ]]; then
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shift
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mount -t bpf bpf /sys/fs/bpf
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mount -t tracefs tracefs /sys/kernel/debug/tracing
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if [[ -d "/run/input/bpf" ]]; then
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export KERNEL_SELFTESTS="/run/input/bpf"
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fi
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dmesg -C
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if ! "$@"; then
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dmesg
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exit 1 # this return code is "swallowed" by qemu
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fi
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touch "/run/output/success"
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exit 0
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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.bz"
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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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wget -nv -N -P "${tmp_dir}" "https://github.com/cilium/ci-kernels/raw/${branch}/${1}"
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}
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fetch "${kernel}"
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cp "${tmp_dir}/${kernel}" "${input}/bzImage"
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if fetch "${selftests}"; then
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mkdir "${input}/bpf"
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tar --strip-components=4 -xjf "${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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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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