diff --git a/tools/testing/selftests/bpf/vmtest.sh b/tools/testing/selftests/bpf/vmtest.sh new file mode 100755 index 000000000000..26ae8d0b6ce3 --- /dev/null +++ b/tools/testing/selftests/bpf/vmtest.sh @@ -0,0 +1,368 @@ +#!/bin/bash +# SPDX-License-Identifier: GPL-2.0 + +set -u +set -e + +# This script currently only works for x86_64, as +# it is based on the VM image used by the BPF CI which is +# x86_64. +QEMU_BINARY="${QEMU_BINARY:="qemu-system-x86_64"}" +X86_BZIMAGE="arch/x86/boot/bzImage" +DEFAULT_COMMAND="./test_progs" +MOUNT_DIR="mnt" +ROOTFS_IMAGE="root.img" +OUTPUT_DIR="$HOME/.bpf_selftests" +KCONFIG_URL="https://raw.githubusercontent.com/libbpf/libbpf/master/travis-ci/vmtest/configs/latest.config" +KCONFIG_API_URL="https://api.github.com/repos/libbpf/libbpf/contents/travis-ci/vmtest/configs/latest.config" +INDEX_URL="https://raw.githubusercontent.com/libbpf/libbpf/master/travis-ci/vmtest/configs/INDEX" +NUM_COMPILE_JOBS="$(nproc)" + +usage() +{ + cat <] -- [] + + is the command you would normally run when you are in +tools/testing/selftests/bpf. e.g: + + $0 -- ./test_progs -t test_lsm + +If no command is specified, "${DEFAULT_COMMAND}" will be run by +default. + +If you build your kernel using KBUILD_OUTPUT= or O= options, these +can be passed as environment variables to the script: + + O= $0 -- ./test_progs -t test_lsm + +or + + KBUILD_OUTPUT= $0 -- ./test_progs -t test_lsm + +Options: + + -i) Update the rootfs image with a newer version. + -d) Update the output directory (default: ${OUTPUT_DIR}) + -j) Number of jobs for compilation, similar to -j in make + (default: ${NUM_COMPILE_JOBS}) +EOF +} + +unset URLS +populate_url_map() +{ + if ! declare -p URLS &> /dev/null; then + # URLS contain the mapping from file names to URLs where + # those files can be downloaded from. + declare -gA URLS + while IFS=$'\t' read -r name url; do + URLS["$name"]="$url" + done < <(curl -Lsf ${INDEX_URL}) + fi +} + +download() +{ + local file="$1" + + if [[ ! -v URLS[$file] ]]; then + echo "$file not found" >&2 + return 1 + fi + + echo "Downloading $file..." >&2 + curl -Lsf "${URLS[$file]}" "${@:2}" +} + +newest_rootfs_version() +{ + { + for file in "${!URLS[@]}"; do + if [[ $file =~ ^libbpf-vmtest-rootfs-(.*)\.tar\.zst$ ]]; then + echo "${BASH_REMATCH[1]}" + fi + done + } | sort -rV | head -1 +} + +download_rootfs() +{ + local rootfsversion="$1" + local dir="$2" + + if ! which zstd &> /dev/null; then + echo 'Could not find "zstd" on the system, please install zstd' + exit 1 + fi + + download "libbpf-vmtest-rootfs-$rootfsversion.tar.zst" | + zstd -d | sudo tar -C "$dir" -x +} + +recompile_kernel() +{ + local kernel_checkout="$1" + local make_command="$2" + + cd "${kernel_checkout}" + + ${make_command} olddefconfig + ${make_command} +} + +mount_image() +{ + local rootfs_img="${OUTPUT_DIR}/${ROOTFS_IMAGE}" + local mount_dir="${OUTPUT_DIR}/${MOUNT_DIR}" + + sudo mount -o loop "${rootfs_img}" "${mount_dir}" +} + +unmount_image() +{ + local mount_dir="${OUTPUT_DIR}/${MOUNT_DIR}" + + sudo umount "${mount_dir}" &> /dev/null +} + +update_selftests() +{ + local kernel_checkout="$1" + local selftests_dir="${kernel_checkout}/tools/testing/selftests/bpf" + + cd "${selftests_dir}" + ${make_command} + + # Mount the image and copy the selftests to the image. + mount_image + sudo rm -rf "${mount_dir}/root/bpf" + sudo cp -r "${selftests_dir}" "${mount_dir}/root" + unmount_image +} + +update_init_script() +{ + local init_script_dir="${OUTPUT_DIR}/${MOUNT_DIR}/etc/rcS.d" + local init_script="${init_script_dir}/S50-startup" + local command="$1" + local log_file="$2" + + mount_image + + if [[ ! -d "${init_script_dir}" ]]; then + cat <${init_script}" <&1 | tee /root/${log_file} +poweroff -f +EOF + + sudo chmod a+x "${init_script}" + unmount_image +} + +create_vm_image() +{ + local rootfs_img="${OUTPUT_DIR}/${ROOTFS_IMAGE}" + local mount_dir="${OUTPUT_DIR}/${MOUNT_DIR}" + + rm -rf "${rootfs_img}" + touch "${rootfs_img}" + chattr +C "${rootfs_img}" >/dev/null 2>&1 || true + + truncate -s 2G "${rootfs_img}" + mkfs.ext4 -q "${rootfs_img}" + + mount_image + download_rootfs "$(newest_rootfs_version)" "${mount_dir}" + unmount_image +} + +run_vm() +{ + local kernel_bzimage="$1" + local rootfs_img="${OUTPUT_DIR}/${ROOTFS_IMAGE}" + + if ! which "${QEMU_BINARY}" &> /dev/null; then + cat <