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ci: add vmtest build testing #94

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359 changes: 359 additions & 0 deletions .github/workflows/test.yml
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name: test

on:
workflow_call:
pull_request:

concurrency:
group: ci-test-${{ github.ref_name }}
cancel-in-progress: true

jobs:
llvm-toolchain:
runs-on: ubuntu-latest
outputs:
llvm: ${{ steps.llvm-toolchain-impl.outputs.version }}
steps:
- if: ${{ github.repository == 'kernel-patches/vmtest' || github.repository == 'kernel-patches/bpf' }}
uses: actions/checkout@v3
with:
repository: 'libbpf/ci'
- if: ${{ github.repository == 'libbpf/ci' }}
uses: actions/checkout@v3
- id: llvm-version
uses: ./get-llvm-version
- id: llvm-toolchain-impl
shell: bash
run: echo "version=llvm-${{ steps.llvm-version.outputs.version }}" >> $GITHUB_OUTPUT
set-matrix:
needs: llvm-toolchain
runs-on: ubuntu-latest
outputs:
build-matrix: ${{ steps.set-matrix-impl.outputs.build_matrix }}
test-matrix: ${{ steps.set-matrix-impl.outputs.test_matrix }}
steps:
- id: set-matrix-impl
shell: python3 -I {0}
run: |
from json import dumps
from enum import Enum
import os

class Arch(Enum):
"""
CPU architecture supported by CI.
"""
aarch64 = "aarch64"
s390x = "s390x"
x86_64 = "x86_64"

def set_output(name, value):
"""Write an output variable to the GitHub output file."""
with open(os.getenv("GITHUB_OUTPUT"), "a") as f:
f.write(f"{name}={value}\n")

def generate_test_config(test):
"""Create the configuration for the provided test."""
experimental = test.endswith("_parallel")
config = {
"test": test,
"continue_on_error": experimental,
# While in experimental mode, parallel jobs may get stuck
# anywhere, including in user space where the kernel won't detect
# a problem and panic. We add a second layer of (smaller) timeouts
# here such that if we get stuck in a parallel run, we hit this
# timeout and fail without affecting the overall job success (as
# would be the case if we hit the job-wide timeout). For
# non-experimental jobs, 360 is the default which will be
# superseded by the overall workflow timeout (but we need to
# specify something).
"timeout_minutes": 30 if experimental else 360,
}
return config

matrix = [
{"kernel": "LATEST", "runs_on": [], "arch": Arch.x86_64.value, "toolchain": "gcc"},
{"kernel": "LATEST", "runs_on": [], "arch": Arch.x86_64.value, "toolchain": "${{ needs.llvm-toolchain.outputs.llvm }}"},
{"kernel": "LATEST", "runs_on": [], "arch": Arch.aarch64.value, "toolchain": "gcc"},
{"kernel": "LATEST", "runs_on": [], "arch": Arch.aarch64.value, "toolchain": "${{ needs.llvm-toolchain.outputs.llvm }}"},
{"kernel": "LATEST", "runs_on": [], "arch": Arch.s390x.value, "toolchain": "gcc"},
]
self_hosted_repos = [
"kernel-patches/bpf",
"kernel-patches/vmtest",
]

# Only a few repository within "kernel-patches" use self-hosted runners.
if "${{ github.repository_owner }}" != "kernel-patches" or "${{ github.repository }}" not in self_hosted_repos:
# Outside of those repositories, we only run on x86_64 GH hosted runners (ubuntu-latest)
for idx in range(len(matrix) - 1, -1, -1):
if matrix[idx]["arch"] != Arch.x86_64.value:
del matrix[idx]
else:
matrix[idx]["runs_on"] = ["ubuntu-latest"]
else:
# Otherwise, run on (self-hosted, arch) runners
for idx in range(len(matrix) - 1, -1, -1):
matrix[idx]["runs_on"].extend(["self-hosted", matrix[idx]["arch"]])

build_matrix = {"include": matrix}
set_output("build_matrix", dumps(build_matrix))

tests = [
"test_progs",
"test_progs_parallel",
"test_progs_no_alu32",
"test_progs_no_alu32_parallel",
"test_maps",
"test_verifier",
]
test_matrix = {"include": [{**config, **generate_test_config(test)}
for config in matrix
for test in tests]}
set_output("test_matrix", dumps(test_matrix))
build:
name: build for ${{ matrix.arch }} with ${{ matrix.toolchain }}
needs: set-matrix
runs-on: ${{ matrix.runs_on }}
timeout-minutes: 100
strategy:
fail-fast: false
matrix: ${{ fromJSON(needs.set-matrix.outputs.build-matrix) }}
env:
KERNEL: ${{ matrix.kernel }}
REPO_ROOT: ${{ github.workspace }}
REPO_PATH: ""
KBUILD_OUTPUT: kbuild-output/
steps:
- if: ${{ github.repository == 'kernel-patches/vmtest' || github.repository == 'kernel-patches/bpf' }}
uses: actions/checkout@v3
with:
repository: 'libbpf/ci'
- if: ${{ github.repository == 'libbpf/ci' }}
uses: actions/checkout@v3
- if: ${{ github.repository == 'kernel-patches/bpf' }}
uses: actions/checkout@v3
# We fetch an actual bit of history here to facilitate incremental
# builds (which may check out some earlier upstream change).
with:
fetch-depth: 50
- if: ${{ github.repository == 'kernel-patches/vmtest' || github.repository == 'libbpf/ci' }}
name: Download bpf-next tree
uses: ./get-linux-source
with:
dest: '.kernel'
- if: ${{ github.repository == 'kernel-patches/vmtest' || github.repository == 'libbpf/ci' }}
name: Move linux source in place
shell: bash
run: |
rm -rf .kernel/.git
cp -rf .kernel/. .
rm -rf .kernel
- name: Get commit meta-data
id: get-commit-metadata
shell: bash
run: |
if [ ${{ github.event_name }} = 'push' ]; then
branch="${{ github.ref_name }}"
echo "branch=${branch}" >> "${GITHUB_OUTPUT}"
else
branch="${{ github.base_ref }}"
echo "branch=${branch}" >> "${GITHUB_OUTPUT}"
fi

upstream=$(echo "${branch}" | sed 's@_base$@@')
commit="$(
git rev-parse "origin/${upstream}" &> /dev/null \
|| (
git fetch --quiet --prune --no-tags --depth=1 --no-recurse-submodules origin +refs/heads/${upstream}:refs/remotes/origin/${upstream} \
&& git rev-parse "origin/${upstream}"
)
)"

echo "timestamp=$(TZ=utc git show --format='%cd' --no-patch --date=iso-strict-local ${commit})" >> "${GITHUB_OUTPUT}"
echo "commit=${commit}" >> "${GITHUB_OUTPUT}"
echo "Most recent upstream commit is ${commit}"
- name: Pull recent KBUILD_OUTPUT contents
uses: actions/cache@v3
with:
path: ${{ env.KBUILD_OUTPUT }}
key: kbuild-output-${{ matrix.arch }}-${{ matrix.toolchain }}-${{ steps.get-commit-metadata.outputs.branch }}-${{ steps.get-commit-metadata.outputs.timestamp }}-${{ steps.get-commit-metadata.outputs.commit }}
restore-keys: |
kbuild-output-${{ matrix.arch }}-${{ matrix.toolchain }}-${{ steps.get-commit-metadata.outputs.branch }}-${{ steps.get-commit-metadata.outputs.timestamp }}-
kbuild-output-${{ matrix.arch }}-${{ matrix.toolchain }}-${{ steps.get-commit-metadata.outputs.branch }}-
kbuild-output-${{ matrix.arch }}-${{ matrix.toolchain }}-
- name: Prepare incremental build
shell: bash
run: |
set -e -u

# $1 - the SHA-1 to fetch and check out
fetch_and_checkout() {
local build_base_sha="${1}"

# If cached artifacts became stale for one reason or another, we
# may not have the build base SHA available. Fetch it and retry.
git fetch origin "${build_base_sha}" && git checkout --quiet "${build_base_sha}"
}

# $1 - value of KBUILD_OUTPUT
clear_cache_artifacts() {
local kbuild_output="${1}"
echo "Unable to find earlier upstream ref. Discarding KBUILD_OUTPUT contents..."
rm --recursive --force "${kbuild_output}"
mkdir "${kbuild_output}"
false
}

# $1 - value of KBUILD_OUTPUT
# $2 - current time in ISO 8601 format
restore_source_code_times() {
local kbuild_output="${1}"
local current_time="${2}"
local src_time="$(date --iso-8601=ns --date="${current_time} - 2 minutes")"
local obj_time="$(date --iso-8601=ns --date="${current_time} - 1 minute")"

git ls-files | xargs --max-args=10000 touch -m --no-create --date="${src_time}"
find "${kbuild_output}" -type f | xargs --max-args=10000 touch -m --no-create --date="${obj_time}"
git checkout --quiet -
echo "Adjusted src and obj time stamps relative to system time"
}

mkdir --parents "${KBUILD_OUTPUT}"
current_time="$(date --iso-8601=ns)"

if [ -f "${KBUILD_OUTPUT}/.build-base-sha" ]; then
build_base_sha="$(cat "${KBUILD_OUTPUT}/.build-base-sha")"
echo "Setting up base build state for ${build_base_sha}"

(
git checkout --quiet "${build_base_sha}" \
|| fetch_and_checkout "${build_base_sha}" \
|| clear_cache_artifacts "${KBUILD_OUTPUT}"
) && restore_source_code_times "${KBUILD_OUTPUT}" "${current_time}"
else
echo "No previous build data found"
fi

echo -n "${{ steps.get-commit-metadata.outputs.commit }}" > "${KBUILD_OUTPUT}/.build-base-sha"
- uses: ./patch-kernel
with:
patches-root: '${{ github.workspace }}/ci/diffs'
repo-root: '${{ github.workspace }}'
- name: Setup build environment
uses: ./setup-build-env
- name: Build kernel image
uses: ./build-linux
with:
arch: ${{ matrix.arch }}
toolchain: ${{ matrix.toolchain }}
kbuild-output: ${{ env.KBUILD_OUTPUT }}
max-make-jobs: 32
- if: ${{ github.event_name != 'push' }}
name: Build selftests
uses: ./build-selftests
with:
toolchain: ${{ matrix.toolchain }}
kbuild-output: ${{ env.KBUILD_OUTPUT }}
max-make-jobs: 32
- if: ${{ github.event_name != 'push' }}
name: Build samples
uses: ./build-samples
with:
toolchain: ${{ matrix.toolchain }}
kbuild-output: ${{ env.KBUILD_OUTPUT }}
max-make-jobs: 32
- if: ${{ github.event_name != 'push' }}
name: Tar artifacts
run: |
# Remove intermediate object files that we have no use for. Ideally
# we'd just exclude them from tar below, but it does not provide
# options to express the precise constraints.
find selftests/ -name "*.o" -a ! -name "*.bpf.o" -print0 | \
xargs --null --max-args=10000 rm

# Strip debug information, which is excessively large (consuming
# bandwidth) while not actually being used (the kernel does not use
# DWARF to symbolize stacktraces).
strip --strip-debug "${KBUILD_OUTPUT}"/vmlinux

file_list=""
if [ "${{ github.repository }}" == "kernel-patches/vmtest" ]; then
# Package up a bunch of additional infrastructure to support running
# 'make kernelrelease' and bpf tool checks later on.
file_list="$(find . -iname Makefile | xargs) \
scripts/ \
tools/testing/selftests/bpf/ \
tools/include/ \
tools/bpf/bpftool/";
fi
# zstd is installed by default in the runner images.
tar -cf - \
"${KBUILD_OUTPUT}"/.config \
"${KBUILD_OUTPUT}"/$(KBUILD_OUTPUT="${KBUILD_OUTPUT}" make -s image_name) \
"${KBUILD_OUTPUT}"/include/config/auto.conf \
"${KBUILD_OUTPUT}"/include/generated/autoconf.h \
"${KBUILD_OUTPUT}"/vmlinux \
${file_list} \
--exclude '*.cmd' \
--exclude '*.d' \
--exclude '*.h' \
--exclude '*.output' \
selftests/bpf/ | zstd -T0 -19 -o vmlinux-${{ matrix.arch }}-${{ matrix.toolchain }}.tar.zst
- if: ${{ github.event_name != 'push' }}
name: Remove KBUILD_OUTPUT contents
shell: bash
run: |
# Remove $KBUILD_OUTPUT to prevent cache creation for pull requests.
# Only on pushed changes are build artifacts actually cached, because
# of github.com/actions/cache's cache isolation logic.
rm -rf "${KBUILD_OUTPUT}"
- if: ${{ github.event_name != 'push' }}
uses: actions/upload-artifact@v3
with:
name: vmlinux-${{ matrix.arch }}-${{ matrix.toolchain }}
if-no-files-found: error
path: vmlinux-${{ matrix.arch }}-${{ matrix.toolchain }}.tar.zst
test:
if: ${{ github.event_name != 'push' }}
name: ${{ matrix.test }} on ${{ matrix.arch }} with ${{ matrix.toolchain }}
needs: [set-matrix, build]
strategy:
fail-fast: false
matrix: ${{ fromJSON(needs.set-matrix.outputs.test-matrix) }}
runs-on: ${{ matrix.runs_on }}
timeout-minutes: 100
env:
KERNEL: ${{ matrix.kernel }}
REPO_ROOT: ${{ github.workspace }}
REPO_PATH: ""
KBUILD_OUTPUT: kbuild-output/
steps:
- uses: actions/checkout@v3
- uses: actions/download-artifact@v3
with:
name: vmlinux-${{ matrix.arch }}-${{ matrix.toolchain }}
path: .
- name: Untar artifacts
# zstd is installed by default in the runner images.
run: zstd -d -T0 vmlinux-${{ matrix.arch }}-${{ matrix.toolchain }}.tar.zst --stdout | tar -xf -
- name: Prepare rootfs
uses: ./prepare-rootfs
with:
project-name: 'libbpf'
arch: ${{ matrix.arch }}
kernel: ${{ matrix.kernel }}
kernel-root: '.'
kbuild-output: ${{ env.KBUILD_OUTPUT }}
image-output: '/tmp/root.img'
test: ${{ matrix.test }}
- name: Run selftests
uses: ./run-qemu
continue-on-error: ${{ matrix.continue_on_error }}
timeout-minutes: ${{ matrix.timeout_minutes }}
with:
arch: ${{ matrix.arch}}
img: '/tmp/root.img'
vmlinuz: '${{ github.workspace }}/vmlinuz'
kernel-root: '.'
max-cpu: 8
3 changes: 2 additions & 1 deletion prepare-rootfs/run.sh
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Original file line number Diff line number Diff line change
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#!/bin/bash

set -euo pipefail
set +x
trap 'exit 2' ERR

source $(cd $(dirname $0) && pwd)/../helpers.sh
Expand Down Expand Up @@ -292,7 +293,7 @@ fi

# Only go to the network if it's actually a glob pattern.
if [[ -v BUILDDIR ]]; then
KERNELRELEASE="$(KBUILD_OUTPUT="${BUILDDIR}" make -C "${KERNELSRC:-$BUILDDIR}" -s kernelrelease)"
KERNELRELEASE="$(KBUILD_OUTPUT=\"${BUILDDIR}\" make -C \"${KERNELSRC:-$BUILDDIR}\" -s kernelrelease)"
elif [[ ! $KERNELRELEASE =~ ^([^\\*?[]|\\[*?[])*\\?$ ]]; then
# We need to cache the list of URLs outside of the command
# substitution, which happens in a subshell.
Expand Down