Add fallback to an old attaching method

.github/actions/build-selftests/action.yml

@@ -1,31 +0,0 @@
-name: 'build-selftests'
-description: 'Build BPF selftests'
-inputs:
-  repo-path:
-    description: 'where is the source code'
-    required: true
-  kernel:
-    description: 'kernel version or LATEST'
-    required: true
-    default: 'LATEST'
-  vmlinux:
-    description: 'where is vmlinux file'
-    required: true
-    default: '${{ github.workspace }}/vmlinux'
-
-runs:
-  using: "composite"
-  steps:
-    - shell: bash
-      run: |
-        source $GITHUB_ACTION_PATH/../../../ci/vmtest/helpers.sh
-        foldable start "Setup Env"
-        sudo apt-get install -y qemu-kvm zstd binutils-dev elfutils libcap-dev libelf-dev libdw-dev python3-docutils
-        foldable end
-    - shell: bash
-      run: |
-        export KERNEL=${{ inputs.kernel }}
-        export REPO_ROOT="${{ github.workspace }}"
-        export REPO_PATH="${{ inputs.repo-path }}"
-        export VMLINUX_BTF="${{ inputs.vmlinux }}"
-        ${{ github.action_path }}/build_selftests.sh

.github/actions/build-selftests/helpers.sh

@@ -1,36 +0,0 @@
-# $1 - start or end
-# $2 - fold identifier, no spaces
-# $3 - fold section description
-foldable() {
-  local YELLOW='\033[1;33m'
-  local NOCOLOR='\033[0m'
-  if [ $1 = "start" ]; then
-    line="::group::$2"
-    if [ ! -z "${3:-}" ]; then
-      line="$line - ${YELLOW}$3${NOCOLOR}"
-    fi
-  else
-    line="::endgroup::"
-  fi
-  echo -e "$line"
-}
-
-__print() {
-  local TITLE=""
-  if [[ -n $2 ]]; then
-      TITLE=" title=$2"
-  fi
-  echo "::$1${TITLE}::$3"
-}
-
-# $1 - title
-# $2 - message
-print_error() {
-  __print error $1 $2
-}
-
-# $1 - title
-# $2 - message
-print_notice() {
-  __print notice $1 $2
-}

.github/actions/build-selftests/prepare_selftests-4.9.0.sh

@@ -1,3 +0,0 @@
-#!/bin/bash
-
-printf "all:\n\ttouch bpf_testmod.ko\n\nclean:\n" > bpf_testmod/Makefile

.github/actions/build-selftests/prepare_selftests-5.5.0.sh

@@ -1,3 +0,0 @@
-#!/bin/bash
-
-printf "all:\n\ttouch bpf_testmod.ko\n\nclean:\n" > bpf_testmod/Makefile

.github/actions/debian/action.yml

@@ -1,16 +0,0 @@
-name: 'debian'
-description: 'Build'
-inputs:
-  target:
-    description: 'Run target'
-    required: true
-runs:
-  using: "composite"
-  steps:
-    - run: |
-        source /tmp/ci_setup
-        bash -x $CI_ROOT/managers/debian.sh SETUP
-        bash -x $CI_ROOT/managers/debian.sh ${{ inputs.target }}
-        bash -x $CI_ROOT/managers/debian.sh CLEANUP
-      shell: bash
-

.github/actions/setup/action.yml

@@ -1,23 +0,0 @@
-name: 'setup'
-description: 'setup env, create /tmp/ci_setup'
-runs:
-  using: "composite"
-  steps:
-    - id: variables
-      run: |
-        export REPO_ROOT=$GITHUB_WORKSPACE
-        export CI_ROOT=$REPO_ROOT/travis-ci
-        # this is somewhat ugly, but that is the easiest way to share this code with
-        # arch specific docker
-        echo 'echo ::group::Env setup' > /tmp/ci_setup
-        echo export DEBIAN_FRONTEND=noninteractive >> /tmp/ci_setup
-        echo sudo apt-get update >> /tmp/ci_setup
-        echo sudo apt-get install -y aptitude qemu-kvm zstd binutils-dev elfutils libcap-dev libelf-dev libdw-dev libguestfs-tools >> /tmp/ci_setup
-        echo export PROJECT_NAME='libbpf' >> /tmp/ci_setup
-        echo export AUTHOR_EMAIL="$(git log -1 --pretty=\"%aE\")" >> /tmp/ci_setup
-        echo export REPO_ROOT=$GITHUB_WORKSPACE >> /tmp/ci_setup
-        echo export CI_ROOT=$REPO_ROOT/travis-ci >> /tmp/ci_setup
-        echo export VMTEST_ROOT=$CI_ROOT/vmtest >> /tmp/ci_setup
-        echo 'echo ::endgroup::' >> /tmp/ci_setup
-      shell: bash
-

.github/actions/vmtest/action.yml

@@ -1,96 +0,0 @@
-name: 'vmtest'
-description: 'Build + run vmtest'
-inputs:
-  kernel:
-    description: 'kernel version or LATEST'
-    required: true
-    default: 'LATEST'
-  arch:
-    description: 'what arch to test'
-    required: true
-    default: 'x86_64'
-  pahole:
-    description: 'pahole rev or master'
-    required: true
-    default: 'master'
-runs:
-  using: "composite"
-  steps:
-    # setup environment
-    - name: Setup environment
-      uses: libbpf/ci/setup-build-env@master
-      with:
-        pahole: ${{ inputs.pahole }}
-    # 1. download CHECKPOINT kernel source
-    - name: Get checkpoint commit
-      shell: bash
-      run: |
-        cat CHECKPOINT-COMMIT
-        echo "CHECKPOINT=$(cat CHECKPOINT-COMMIT)" >> $GITHUB_ENV
-    - name: Get kernel source at checkpoint
-      uses: libbpf/ci/get-linux-source@master
-      with:
-        repo: 'https://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf-next.git'
-        rev: ${{ env.CHECKPOINT }}
-        dest: '${{ github.workspace }}/.kernel'
-    - name: Patch kernel source
-      uses: libbpf/ci/patch-kernel@master
-      with:
-        patches-root: '${{ github.workspace }}/travis-ci/diffs'
-        repo-root: '.kernel'
-    - name: Prepare to build BPF selftests
-      shell: bash
-      run: |
-        source $GITHUB_ACTION_PATH/../../../ci/vmtest/helpers.sh
-        foldable start "Prepare building selftest"
-        cd .kernel
-        cat tools/testing/selftests/bpf/config \
-            tools/testing/selftests/bpf/config.${{ inputs.arch }} > .config
-        make olddefconfig && make prepare
-        cd -
-        foldable end
-    # 2. if kernel == LATEST, build kernel image from tree
-    - name: Build kernel image
-      if: ${{ inputs.kernel == 'LATEST' }}
-      shell: bash
-      run: |
-        source $GITHUB_ACTION_PATH/../../../ci/vmtest/helpers.sh
-        foldable start "Build Kernel Image"
-        cd .kernel
-        make -j $((4*$(nproc))) all > /dev/null
-        cp vmlinux ${{ github.workspace }}
-        cd -
-        foldable end
-    # else, just download prebuilt kernel image
-    - name: Download prebuilt kernel
-      if: ${{ inputs.kernel != 'LATEST' }}
-      uses: libbpf/ci/download-vmlinux@master
-      with:
-        kernel: ${{ inputs.kernel }}
-        arch: ${{ inputs.arch }}
-    # 3. build selftests
-    - name: Build BPF selftests
-      uses: ./.github/actions/build-selftests
-      with:
-        repo-path: '.kernel'
-        kernel: ${{ inputs.kernel }}
-    # 4. prepare rootfs
-    - name: prepare rootfs
-      uses: libbpf/ci/prepare-rootfs@master
-      with:
-        project-name: 'libbpf'
-        arch: ${{ inputs.arch }}
-        kernel: ${{ inputs.kernel }}
-        kernel-root: '.kernel'
-        image-output: '/tmp/root.img'
-    # 5. run selftest in QEMU
-    - name: Run selftests
-      env:
-        KERNEL: ${{ inputs.kernel }}
-        REPO_ROOT: ${{ github.workspace }}
-      uses: libbpf/ci/run-qemu@master
-      with:
-        arch: ${{ inputs.arch }}
-        img: '/tmp/root.img'
-        vmlinuz: 'vmlinuz'
-        kernel-root: '.kernel'

.github/workflows/build.yml

@@ -1,81 +0,0 @@
-name: libbpf-build
-
-on:
-  pull_request:
-  push:
-  schedule:
-    - cron:  '0 18 * * *'
-
-concurrency:
-  group: ci-build-${{ github.head_ref }}
-  cancel-in-progress: true
-
-jobs:
-
-  debian:
-    runs-on: ubuntu-latest
-    name: Debian Build (${{ matrix.name }})
-    strategy:
-      fail-fast: false
-      matrix:
-        include:
-          - name: default
-            target: RUN
-          - name: ASan+UBSan
-            target: RUN_ASAN
-          - name: clang
-            target: RUN_CLANG
-          - name: clang ASan+UBSan
-            target: RUN_CLANG_ASAN
-          - name: gcc-10
-            target: RUN_GCC10
-          - name: gcc-10 ASan+UBSan
-            target: RUN_GCC10_ASAN
-    steps:
-      - uses: actions/checkout@v3
-        name: Checkout
-      - uses: ./.github/actions/setup
-        name: Setup
-      - uses: ./.github/actions/debian
-        name: Build
-        with:
-          target: ${{ matrix.target }}
-
-  ubuntu:
-    runs-on: ubuntu-latest
-    name: Ubuntu Focal Build (${{ matrix.arch }})
-    strategy:
-      fail-fast: false
-      matrix:
-        include:
-          - arch: aarch64
-          - arch: ppc64le
-          - arch: s390x
-          - arch: x86
-    steps:
-      - uses: actions/checkout@v3
-        name: Checkout
-      - uses: ./.github/actions/setup
-        name: Pre-Setup
-      - run: source /tmp/ci_setup && sudo -E $CI_ROOT/managers/ubuntu.sh
-        if: matrix.arch == 'x86'
-        name: Setup
-      - uses: uraimo/run-on-arch-action@v2.0.5
-        name: Build in docker
-        if: matrix.arch != 'x86'
-        with:
-          distro:
-            ubuntu20.04
-          arch:
-            ${{ matrix.arch }}
-          setup:
-            cp /tmp/ci_setup $GITHUB_WORKSPACE
-          dockerRunArgs: |
-            --volume "${GITHUB_WORKSPACE}:${GITHUB_WORKSPACE}"
-          shell: /bin/bash
-          install: |
-            export DEBIAN_FRONTEND=noninteractive
-            export TZ="America/Los_Angeles"
-            apt-get update -y
-            apt-get install -y tzdata build-essential sudo
-          run: source ${GITHUB_WORKSPACE}/ci_setup && $CI_ROOT/managers/ubuntu.sh

.github/workflows/cifuzz.yml

@@ -1,40 +0,0 @@
----
-# https://google.github.io/oss-fuzz/getting-started/continuous-integration/
-name: CIFuzz
-on:
-  push:
-    branches:
-      - master
-  pull_request:
-    branches:
-      - master
-jobs:
-  Fuzzing:
-    runs-on: ubuntu-latest
-    if: github.repository == 'libbpf/libbpf'
-    strategy:
-      fail-fast: false
-      matrix:
-        sanitizer: [address, undefined, memory]
-    steps:
-      - name: Build Fuzzers (${{ matrix.sanitizer }})
-        id: build
-        uses: google/oss-fuzz/infra/cifuzz/actions/build_fuzzers@master
-        with:
-          oss-fuzz-project-name: 'libbpf'
-          dry-run: false
-          allowed-broken-targets-percentage: 0
-          sanitizer: ${{ matrix.sanitizer }}
-      - name: Run Fuzzers (${{ matrix.sanitizer }})
-        uses: google/oss-fuzz/infra/cifuzz/actions/run_fuzzers@master
-        with:
-          oss-fuzz-project-name: 'libbpf'
-          fuzz-seconds: 300
-          dry-run: false
-          sanitizer: ${{ matrix.sanitizer }}
-      - name: Upload Crash
-        uses: actions/upload-artifact@v1
-        if: failure() && steps.build.outcome == 'success'
-        with:
-          name: ${{ matrix.sanitizer }}-artifacts
-          path: ./out/artifacts

.github/workflows/coverity.yml

@@ -1,32 +0,0 @@
-name: libbpf-ci-coverity
-
-on:
-  schedule:
-    - cron:  '0 18 * * *'
-
-
-jobs:
-  coverity:
-    runs-on: ubuntu-latest
-    if: github.repository == 'libbpf/libbpf'
-    name: Coverity
-    steps:
-      - uses: actions/checkout@v3
-      - uses: ./.github/actions/setup
-      - name: Run coverity
-        run: |
-          source "${GITHUB_WORKSPACE}"/ci/vmtest/helpers.sh
-          foldable start "Setup CI env"
-          source /tmp/ci_setup
-          export COVERITY_SCAN_NOTIFICATION_EMAIL="${AUTHOR_EMAIL}"
-          export COVERITY_SCAN_BRANCH_PATTERN=${GITHUB_REF##refs/*/}
-          export TRAVIS_BRANCH=${COVERITY_SCAN_BRANCH_PATTERN}
-          foldable end
-          scripts/coverity.sh
-        env:
-          COVERITY_SCAN_TOKEN: ${{ secrets.COVERITY_SCAN_TOKEN }}
-          COVERITY_SCAN_PROJECT_NAME: libbpf
-          COVERITY_SCAN_BUILD_COMMAND_PREPEND: 'cd src/'
-          COVERITY_SCAN_BUILD_COMMAND: 'make'
-      - name: SCM log
-        run: cat /home/runner/work/libbpf/libbpf/src/cov-int/scm_log.txt

.github/workflows/ondemand.yml

@@ -1,36 +0,0 @@
-name: ondemand
-
-on:
-  workflow_dispatch:
-    inputs:
-      kernel-origin:
-        description: 'git repo for linux kernel'
-        default: 'https://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf-next.git'
-        required: true
-      kernel-rev:
-        description: 'rev/tag/branch for linux kernel'
-        default: "master"
-        required: true
-      pahole-origin:
-        description: 'git repo for pahole'
-        default: 'https://git.kernel.org/pub/scm/devel/pahole/pahole.git'
-        required: true
-      pahole-rev:
-        description: 'ref/tag/branch for pahole'
-        default: "master"
-        required: true
-
-jobs:
-  vmtest:
-    runs-on: ubuntu-latest
-    name: vmtest with customized pahole/Kernel
-    steps:
-      - uses: actions/checkout@v3
-      - uses: ./.github/actions/setup
-      - uses: ./.github/actions/vmtest
-        with:
-          kernel: 'LATEST'
-          kernel-rev: ${{ github.event.inputs.kernel-rev }}
-          kernel-origin: ${{ github.event.inputs.kernel-origin }}
-          pahole: ${{ github.event.inputs.pahole-rev }}
-          pahole-origin: ${{ github.event.inputs.pahole-origin }}

.github/workflows/pahole.yml

@@ -1,20 +0,0 @@
-name: pahole-staging
-
-on:
-  schedule:
-    - cron:  '0 18 * * *'
-
-
-jobs:
-  vmtest:
-    runs-on: ubuntu-latest
-    name: Kernel LATEST + staging pahole
-    env:
-      STAGING: tmp.master
-    steps:
-      - uses: actions/checkout@v3
-      - uses: ./.github/actions/setup
-      - uses: ./.github/actions/vmtest
-        with:
-          kernel: LATEST
-          pahole: $STAGING

.github/workflows/test.yml

@@ -1,42 +0,0 @@
-name: libbpf-ci
-
-on: 
-  pull_request:
-  push:
-  schedule:
-    - cron:  '0 18 * * *'
-
-concurrency: 
-  group: ci-test-${{ github.head_ref }}
-  cancel-in-progress: true
-
-jobs:
-  vmtest:
-    runs-on: ${{ matrix.runs_on }}
-    name: Kernel ${{ matrix.kernel }} on ${{ matrix.runs_on }} + selftests
-    strategy:
-      fail-fast: false
-      matrix:
-        include:
-          - kernel: 'LATEST'
-            runs_on: ubuntu-latest
-            arch: 'x86_64'
-          - kernel: '5.5.0'
-            runs_on: ubuntu-latest
-            arch: 'x86_64'
-          - kernel: '4.9.0'
-            runs_on: ubuntu-latest
-            arch: 'x86_64'
-          - kernel: 'LATEST'
-            runs_on: z15
-            arch: 's390x'
-    steps:
-      - uses: actions/checkout@v3
-        name: Checkout
-      - uses: ./.github/actions/setup
-        name: Setup
-      - uses: ./.github/actions/vmtest
-        name: vmtest
-        with:
-          kernel: ${{ matrix.kernel }}
-          arch: ${{ matrix.arch }}

.readthedocs.yaml

@@ -1,22 +0,0 @@
-# .readthedocs.yaml
-# Read the Docs configuration file
-# See https://docs.readthedocs.io/en/stable/config-file/v2.html for details
-
-# Required
-version: 2
-
-# Build documentation in the docs/ directory with Sphinx
-sphinx:
-  builder: html
-  configuration: docs/conf.py
-
-formats:
-  - htmlzip
-  - pdf
-  - epub
-
-# Optionally set the version of Python and requirements required to build your docs
-python:
-   version: 3.7
-   install:
-   - requirements: docs/sphinx/requirements.txt

.travis.yml

@@ -0,0 +1,123 @@
+sudo: required
+language: bash
+dist: bionic
+services:
+    - docker
+
+env:
+    global:
+        - PROJECT_NAME='libbpf'
+        - AUTHOR_EMAIL="$(git log -1 --pretty=\"%aE\")"
+        - REPO_ROOT="$TRAVIS_BUILD_DIR"
+        - CI_ROOT="$REPO_ROOT/travis-ci"
+        - VMTEST_ROOT="$CI_ROOT/vmtest"
+
+addons:
+    apt:
+        packages:
+            - qemu-kvm
+            - zstd
+            - binutils-dev
+            - elfutils
+            - libcap-dev
+            - libelf-dev
+            - libdw-dev
+
+stages:
+    # Run Coverity periodically instead of for each PR for following reasons:
+    # 1) Coverity jobs are heavily rate-limited
+    # 2) Due to security restrictions of encrypted environment variables
+    #    in Travis CI, pull requests made from forks can't access encrypted
+    #    env variables, making Coverity unusable
+    #    See: https://docs.travis-ci.com/user/pull-requests#pull-requests-and-security-restrictions
+    - name: Coverity
+      if: type = cron
+
+jobs:
+    include:
+        - stage: Build & Test
+          name: Debian Build
+          language: bash
+          install:        $CI_ROOT/managers/debian.sh SETUP
+          script:         $CI_ROOT/managers/debian.sh RUN || travis_terminate 1
+          after_script:   $CI_ROOT/managers/debian.sh CLEANUP
+
+        - name: Debian Build (ASan+UBSan)
+          language: bash
+          install:        $CI_ROOT/managers/debian.sh SETUP
+          script:         $CI_ROOT/managers/debian.sh RUN_ASAN || travis_terminate 1
+          after_script:   $CI_ROOT/managers/debian.sh CLEANUP
+
+        - name: Debian Build (clang)
+          language: bash
+          install:        $CI_ROOT/managers/debian.sh SETUP
+          script:         $CI_ROOT/managers/debian.sh RUN_CLANG || travis_terminate 1
+          after_script:   $CI_ROOT/managers/debian.sh CLEANUP
+
+        - name: Debian Build (clang ASan+UBSan)
+          language: bash
+          install:        $CI_ROOT/managers/debian.sh SETUP
+          script:         $CI_ROOT/managers/debian.sh RUN_CLANG_ASAN || travis_terminate 1
+          after_script:   $CI_ROOT/managers/debian.sh CLEANUP
+
+        - name: Debian Build (gcc-8)
+          language: bash
+          install:        $CI_ROOT/managers/debian.sh SETUP
+          script:         $CI_ROOT/managers/debian.sh RUN_GCC8 || travis_terminate 1
+          after_script:   $CI_ROOT/managers/debian.sh CLEANUP
+
+        - name: Debian Build (gcc-8 ASan+UBSan)
+          language: bash
+          install:        $CI_ROOT/managers/debian.sh SETUP
+          script:         $CI_ROOT/managers/debian.sh RUN_GCC8_ASAN || travis_terminate 1
+          after_script:   $CI_ROOT/managers/debian.sh CLEANUP
+
+        - name: Ubuntu Bionic Build
+          language: bash
+          script: sudo $CI_ROOT/managers/ubuntu.sh || travis_terminate 1
+
+        - name: Ubuntu Bionic Build (arm)
+          arch: arm64
+          language: bash
+          script: sudo $CI_ROOT/managers/ubuntu.sh || travis_terminate 1
+
+        - name: Ubuntu Bionic Build (s390x)
+          arch: s390x
+          language: bash
+          script: sudo $CI_ROOT/managers/ubuntu.sh || travis_terminate 1
+
+        - name: Ubuntu Bionic Build (ppc64le)
+          arch: ppc64le
+          language: bash
+          script: sudo $CI_ROOT/managers/ubuntu.sh || travis_terminate 1
+
+        - name: Kernel 5.5.0 + selftests
+          language: bash
+          env: KERNEL=5.5.0
+          script:  $CI_ROOT/vmtest/run_vmtest.sh || travis_terminate 1
+
+        - name: Kernel LATEST + selftests
+          language: bash
+          env: KERNEL=LATEST
+          script:  $CI_ROOT/vmtest/run_vmtest.sh || travis_terminate 1
+
+        - stage: Coverity
+          language: bash
+          env:
+              # Coverity configuration
+              # COVERITY_SCAN_TOKEN=xxx
+              # Encrypted using `travis encrypt --repo libbpf/libbpf COVERITY_SCAN_TOKEN=xxx`
+              - secure: "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"
+              - COVERITY_SCAN_PROJECT_NAME="libbpf"
+              - COVERITY_SCAN_NOTIFICATION_EMAIL="${AUTHOR_EMAIL}"
+              - COVERITY_SCAN_BRANCH_PATTERN="$TRAVIS_BRANCH"
+              # Note: `make -C src/` as a BUILD_COMMAND will not work here
+              - COVERITY_SCAN_BUILD_COMMAND_PREPEND="cd src/"
+              - COVERITY_SCAN_BUILD_COMMAND="make"
+          install:
+              - sudo echo 'deb-src http://archive.ubuntu.com/ubuntu/ bionic main restricted universe multiverse' >>/etc/apt/sources.list
+              - sudo apt-get update
+              - sudo apt-get -y build-dep libelf-dev
+              - sudo apt-get install -y libelf-dev pkg-config
+          script:
+              - scripts/coverity.sh || travis_terminate 1

BPF-CHECKPOINT-COMMIT

@@ -1 +1 @@
-60240bc26114543fcbfcd8a28466e67e77b20388
+4e15507fea70c0c312d79610efa46b6853ccf8e0

CHECKPOINT-COMMIT

@@ -1 +1 @@
-87dbdc230d162bf9ee1ac77c8ade178b6b1e199e
+69119673bd50b176ded34032fadd41530fb5af21

LICENSE.BSD-2-Clause

@@ -7,7 +7,7 @@ Usage-Guide:
     SPDX-License-Identifier: BSD-2-Clause
 License-Text:
 
-Copyright (c) 2015 The Libbpf Authors. All rights reserved.
+Copyright (c) <year> <owner> . All rights reserved.
 
 Redistribution and use in source and binary forms, with or without
 modification, are permitted provided that the following conditions are met:

README.md

@@ -1,65 +1,32 @@
-<picture>
-  <source media="(prefers-color-scheme: dark)" srcset="assets/libbpf-logo-sideways-darkbg.png" width="40%">
-  <img src="assets/libbpf-logo-sideways.png" width="40%">
-</picture>
 
-libbpf
-[![Github Actions Builds & Tests](https://github.com/libbpf/libbpf/actions/workflows/test.yml/badge.svg)](https://github.com/libbpf/libbpf/actions/workflows/test.yml)
+This is a mirror of [bpf-next linux tree](https://kernel.googlesource.com/pub/scm/linux/kernel/git/bpf/bpf-next)'s
+`tools/lib/bpf` directory plus its supporting header files.
+
+The following files will by sync'ed with bpf-next repo:
+  - `src/` <-> `bpf-next/tools/lib/bpf/`
+  - `include/uapi/linux/bpf_common.h` <-> `bpf-next/tools/include/uapi/linux/bpf_common.h`
+  - `include/uapi/linux/bpf.h` <-> `bpf-next/tools/include/uapi/linux/bpf.h`
+  - `include/uapi/linux/btf.h` <-> `bpf-next/tools/include/uapi/linux/btf.h`
+  - `include/uapi/linux/if_link.h` <-> `bpf-next/tools/include/uapi/linux/if_link.h`
+  - `include/uapi/linux/if_xdp.h` <-> `bpf-next/tools/include/uapi/linux/if_xdp.h`
+  - `include/uapi/linux/netlink.h` <-> `bpf-next/tools/include/uapi/linux/netlink.h`
+  - `include/tools/libc_compat.h` <-> `bpf-next/tools/include/tools/libc_compat.h`
+
+Other header files at this repo (`include/linux/*.h`) are reduced versions of
+their counterpart files at bpf-next's `tools/include/linux/*.h` to make compilation
+successful.
+
+Build
+[![Build Status](https://travis-ci.org/libbpf/libbpf.svg?branch=master)](https://travis-ci.org/libbpf/libbpf)
 [![Total alerts](https://img.shields.io/lgtm/alerts/g/libbpf/libbpf.svg?logo=lgtm&logoWidth=18)](https://lgtm.com/projects/g/libbpf/libbpf/alerts/)
 [![Coverity](https://img.shields.io/coverity/scan/18195.svg)](https://scan.coverity.com/projects/libbpf)
-[![OSS-Fuzz Status](https://oss-fuzz-build-logs.storage.googleapis.com/badges/libbpf.svg)](https://oss-fuzz-build-logs.storage.googleapis.com/index.html#libbpf)
-======
-
-**This is the official home of the libbpf library.**
-
-*Please use this Github repository for building and packaging libbpf
-and when using it in your projects through Git submodule.*
-
-Libbpf *authoritative source code* is developed as part of [bpf-next Linux source
-tree](https://kernel.googlesource.com/pub/scm/linux/kernel/git/bpf/bpf-next) under
-`tools/lib/bpf` subdirectory and is periodically synced to Github. As such, all the
-libbpf changes should be sent to [BPF mailing list](http://vger.kernel.org/vger-lists.html#bpf),
-please don't open PRs here unless you are changing Github-specific parts of libbpf
-(e.g., Github-specific Makefile).
-
-Libbpf and general BPF usage questions
-======================================
-
-Libbpf documentation can be found [here](https://libbpf.readthedocs.io/en/latest/api.html).
-It's an ongoing effort and has ways to go, but please take a look and consider contributing as well.
-
-Please check out [libbpf-bootstrap](https://github.com/libbpf/libbpf-bootstrap)
-and [the companion blog post](https://nakryiko.com/posts/libbpf-bootstrap/) for
-the examples of building BPF applications with libbpf.
-[libbpf-tools](https://github.com/iovisor/bcc/tree/master/libbpf-tools) are also
-a good source of the real-world libbpf-based tracing tools.
-
-See also ["BPF CO-RE reference guide"](https://nakryiko.com/posts/bpf-core-reference-guide/)
-for the coverage of practical aspects of building BPF CO-RE applications and
-["BPF CO-RE"](https://nakryiko.com/posts/bpf-portability-and-co-re/) for
-general introduction into BPF portability issues and BPF CO-RE origins.
-
-All general BPF questions, including kernel functionality, libbpf APIs and
-their application, should be sent to bpf@vger.kernel.org mailing list. You can
-subscribe to it [here](http://vger.kernel.org/vger-lists.html#bpf) and search
-its archive [here](https://lore.kernel.org/bpf/). Please search the archive
-before asking new questions. It very well might be that this was already
-addressed or answered before.
-
-bpf@vger.kernel.org is monitored by many more people and they will happily try
-to help you with whatever issue you have. This repository's PRs and issues
-should be opened only for dealing with issues pertaining to specific way this
-libbpf mirror repo is set up and organized.
-
-Building libbpf
-===============
+=====
 libelf is an internal dependency of libbpf and thus it is required to link
 against and must be installed on the system for applications to work.
 pkg-config is used by default to find libelf, and the program called can be
 overridden with `PKG_CONFIG`.
-
-If using `pkg-config` at build time is not desired, it can be disabled by
-setting `NO_PKG_CONFIG=1` when calling make.
+If using `pkg-config` at build time is not desired, it can be disabled by setting
+`NO_PKG_CONFIG=1` when calling make.
 
 To build both static libbpf.a and shared libbpf.so:
 ```bash
@@ -84,6 +51,29 @@ $ cd src
 $ PKG_CONFIG_PATH=/build/root/lib64/pkgconfig DESTDIR=/build/root make install
 ```
 
+Distributions
+=============
+
+Distributions packaging libbpf from this mirror:
+  - [Fedora](https://src.fedoraproject.org/rpms/libbpf)
+  - [Gentoo](https://packages.gentoo.org/packages/dev-libs/libbpf)
+  - [Debian](https://packages.debian.org/sid/libbpf-dev)
+
+Benefits of packaging from the mirror over packaging from kernel sources:
+  - Consistent versioning across distributions.
+  - No ties to any specific kernel, transparent handling of older kernels.
+    Libbpf is designed to be kernel-agnostic and work across multitude of kernel
+    versions. It has built-in mechanisms to gracefully handle older kernels,
+    that are missing some of the features, by working around or gracefully
+    degrading functionality. Thus libbpf is not tied to a specific kernel
+    version and can/should be packaged and versioned independently.
+  - Continuous integration testing via [TravisCI](https://travis-ci.org/libbpf/libbpf).
+  - Static code analysis via [LGTM](https://lgtm.com/projects/g/libbpf/libbpf) and [Coverity](https://scan.coverity.com/projects/libbpf).
+
+Package dependencies of libbpf, package names may vary across distros:
+  - zlib
+  - libelf
+
 BPF CO-RE (Compile Once – Run Everywhere)
 =========================================
 
@@ -99,9 +89,6 @@ Some major Linux distributions come with kernel BTF already built in:
   - RHEL 8.2+
   - OpenSUSE Tumbleweed (in the next release, as of 2020-06-04)
   - Arch Linux (from kernel 5.7.1.arch1-1)
-  - Manjaro (from kernel 5.4 if compiled after 2021-06-18)
-  - Ubuntu 20.10
-  - Debian 11 (amd64/arm64)
 
 If your kernel doesn't come with BTF built-in, you'll need to build custom
 kernel. You'll need:
@@ -121,64 +108,18 @@ distributions have Clang/LLVM 10+ packaged by default:
   - Fedora 32+
   - Ubuntu 20.04+
   - Arch Linux
-  - Ubuntu 20.10 (LLVM 11)
-  - Debian 11 (LLVM 11)
-  - Alpine 3.13+
 
 Otherwise, please make sure to update it on your system.
 
 The following resources are useful to understand what BPF CO-RE is and how to
 use it:
-- [BPF CO-RE reference guide](https://nakryiko.com/posts/bpf-core-reference-guide/)
-- [BPF Portability and CO-RE](https://nakryiko.com/posts/bpf-portability-and-co-re/)
-- [HOWTO: BCC to libbpf conversion](https://nakryiko.com/posts/bcc-to-libbpf-howto-guide/)
+- [BPF Portability and CO-RE](https://facebookmicrosites.github.io/bpf/blog/2020/02/19/bpf-portability-and-co-re.html)
+- [HOWTO: BCC to libbpf conversion](https://facebookmicrosites.github.io/bpf/blog/2020/02/20/bcc-to-libbpf-howto-guide.html)
 - [libbpf-tools in BCC repo](https://github.com/iovisor/bcc/tree/master/libbpf-tools)
   contain lots of real-world tools converted from BCC to BPF CO-RE. Consider
   converting some more to both contribute to the BPF community and gain some
   more experience with it.
 
-Distributions
-=============
-
-Distributions packaging libbpf from this mirror:
-  - [Fedora](https://src.fedoraproject.org/rpms/libbpf)
-  - [Gentoo](https://packages.gentoo.org/packages/dev-libs/libbpf)
-  - [Debian](https://packages.debian.org/source/sid/libbpf)
-  - [Arch](https://www.archlinux.org/packages/extra/x86_64/libbpf/)
-  - [Ubuntu](https://packages.ubuntu.com/source/impish/libbpf)
-  - [Alpine](https://pkgs.alpinelinux.org/packages?name=libbpf)
-
-Benefits of packaging from the mirror over packaging from kernel sources:
-  - Consistent versioning across distributions.
-  - No ties to any specific kernel, transparent handling of older kernels.
-    Libbpf is designed to be kernel-agnostic and work across multitude of
-    kernel versions. It has built-in mechanisms to gracefully handle older
-    kernels, that are missing some of the features, by working around or
-    gracefully degrading functionality. Thus libbpf is not tied to a specific
-    kernel version and can/should be packaged and versioned independently.
-  - Continuous integration testing via
-    [GitHub Actions](https://github.com/libbpf/libbpf/actions).
-  - Static code analysis via [LGTM](https://lgtm.com/projects/g/libbpf/libbpf)
-    and [Coverity](https://scan.coverity.com/projects/libbpf).
-
-Package dependencies of libbpf, package names may vary across distros:
-  - zlib
-  - libelf
-
-[![libbpf distro packaging status](https://repology.org/badge/vertical-allrepos/libbpf.svg)](https://repology.org/project/libbpf/versions)
-
-
-bpf-next to Github sync
-=======================
-
-All the gory details of syncing can be found in `scripts/sync-kernel.sh`
-script.
-
-Some header files in this repo (`include/linux/*.h`) are reduced versions of
-their counterpart files at
-[bpf-next](https://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf-next.git/)'s
-`tools/include/linux/*.h` to make compilation successful.
-
 License
 =======
 

ci/diffs/001-fix-oob-write-in-test_verifier.diff

@@ -1,35 +0,0 @@
-From: Kumar Kartikeya Dwivedi <memxor@gmail.com>
-To: bpf@vger.kernel.org
-Cc: Alexei Starovoitov <ast@kernel.org>,
-	Daniel Borkmann <daniel@iogearbox.net>,
-	Andrii Nakryiko <andrii@kernel.org>
-Subject: [PATCH bpf-next] selftests/bpf: Fix OOB write in test_verifier
-Date: Tue, 14 Dec 2021 07:18:00 +0530	[thread overview]
-Message-ID: <20211214014800.78762-1-memxor@gmail.com> (raw)
-
-The commit referenced below added fixup_map_timer support (to create a
-BPF map containing timers), but failed to increase the size of the
-map_fds array, leading to out of bounds write. Fix this by changing
-MAX_NR_MAPS to 22.
-
-Fixes: e60e6962c503 ("selftests/bpf: Add tests for restricted helpers")
-Signed-off-by: Kumar Kartikeya Dwivedi <memxor@gmail.com>
----
- tools/testing/selftests/bpf/test_verifier.c | 2 +-
- 1 file changed, 1 insertion(+), 1 deletion(-)
-
-diff --git a/tools/testing/selftests/bpf/test_verifier.c b/tools/testing/selftests/bpf/test_verifier.c
-index ad5d30bafd93..33e2ecb3bef9 100644
---- a/tools/testing/selftests/bpf/test_verifier.c
-+++ b/tools/testing/selftests/bpf/test_verifier.c
-@@ -54,7 +54,7 @@
- #define MAX_INSNS	BPF_MAXINSNS
- #define MAX_TEST_INSNS	1000000
- #define MAX_FIXUPS	8
--#define MAX_NR_MAPS	21
-+#define MAX_NR_MAPS	22
- #define MAX_TEST_RUNS	8
- #define POINTER_VALUE	0xcafe4all
- #define TEST_DATA_LEN	64
---
-2.34.1

ci/managers/test_compile.sh

@@ -1,15 +0,0 @@
-#!/bin/bash
-set -euox pipefail
-
-EXTRA_CFLAGS=${EXTRA_CFLAGS:-}
-EXTRA_LDFLAGS=${EXTRA_LDFLAGS:-}
-
-cat << EOF > main.c
-#include <bpf/libbpf.h>
-int main() {
-  return bpf_object__open(0) < 0;
-}
-EOF
-
-# static linking
-${CC:-cc} ${EXTRA_CFLAGS} ${EXTRA_LDFLAGS} -o main -I./include/uapi -I./install/usr/include main.c ./build/libbpf.a -lelf -lz

ci/managers/ubuntu.sh

@@ -1,24 +0,0 @@
-#!/bin/bash
-set -eux
-
-RELEASE="focal"
-
-apt-get update
-apt-get install -y pkg-config
-
-source "$(dirname $0)/travis_wait.bash"
-
-cd $REPO_ROOT
-
-EXTRA_CFLAGS="-Werror -Wall -fsanitize=address,undefined"
-EXTRA_LDFLAGS="-Werror -Wall -fsanitize=address,undefined"
-mkdir build install
-cc --version
-make -j$((4*$(nproc))) EXTRA_CFLAGS="${EXTRA_CFLAGS}" EXTRA_LDFLAGS="${EXTRA_LDFLAGS}" -C ./src -B OBJDIR=../build
-ldd build/libbpf.so
-if ! ldd build/libbpf.so | grep -q libelf; then
-    echo "FAIL: No reference to libelf.so in libbpf.so!"
-    exit 1
-fi
-make -j$((4*$(nproc))) -C src OBJDIR=../build DESTDIR=../install install
-EXTRA_CFLAGS=${EXTRA_CFLAGS} EXTRA_LDFLAGS=${EXTRA_LDFLAGS} $(dirname $0)/test_compile.sh

ci/rootfs/mkrootfs_debian.sh

@@ -1,52 +0,0 @@
-#!/bin/bash
-# This script builds a Debian root filesystem image for testing libbpf in a
-# virtual machine. Requires debootstrap >= 1.0.95 and zstd.
-
-# Use e.g. ./mkrootfs_debian.sh --arch=s390x to generate a rootfs for a
-# foreign architecture. Requires configured binfmt_misc, e.g. using
-# Debian/Ubuntu's qemu-user-binfmt package or
-# https://github.com/multiarch/qemu-user-static.
-
-set -e -u -x -o pipefail
-
-# Check whether we are root now in order to avoid confusing errors later.
-if [ "$(id -u)" != 0 ]; then
-	echo "$0 must run as root" >&2
-	exit 1
-fi
-
-# Create a working directory and schedule its deletion.
-root=$(mktemp -d -p "$PWD")
-trap 'rm -r "$root"' EXIT
-
-# Install packages.
-packages=(
-	binutils
-	busybox
-	elfutils
-	ethtool
-	iproute2
-	iptables
-	libcap2
-	libelf1
-	strace
-	zlib1g
-)
-packages=$(IFS=, && echo "${packages[*]}")
-debootstrap --include="$packages" --variant=minbase "$@" bookworm "$root"
-
-# Remove the init scripts (tests use their own). Also remove various
-# unnecessary files in order to save space.
-rm -rf \
-	"$root"/etc/rcS.d \
-	"$root"/usr/share/{doc,info,locale,man,zoneinfo} \
-	"$root"/var/cache/apt/archives/* \
-	"$root"/var/lib/apt/lists/*
-
-# Apply common tweaks.
-"$(dirname "$0")"/mkrootfs_tweak.sh "$root"
-
-# Save the result.
-name="libbpf-vmtest-rootfs-$(date +%Y.%m.%d).tar.zst"
-rm -f "$name"
-tar -C "$root" -c . | zstd -T0 -19 -o "$name"

ci/rootfs/mkrootfs_tweak.sh

@@ -1,61 +0,0 @@
-#!/bin/bash
-# This script prepares a mounted root filesystem for testing libbpf in a virtual
-# machine.
-set -e -u -x -o pipefail
-root=$1
-shift
-
-chroot "${root}" /bin/busybox --install
-
-cat > "$root/etc/inittab" << "EOF"
-::sysinit:/etc/init.d/rcS
-::ctrlaltdel:/sbin/reboot
-::shutdown:/sbin/swapoff -a
-::shutdown:/bin/umount -a -r
-::restart:/sbin/init
-EOF
-chmod 644 "$root/etc/inittab"
-
-mkdir -m 755 -p "$root/etc/init.d" "$root/etc/rcS.d"
-cat > "$root/etc/rcS.d/S10-mount" << "EOF"
-#!/bin/sh
-
-set -eux
-
-/bin/mount proc /proc -t proc
-
-# Mount devtmpfs if not mounted
-if [[ -z $(/bin/mount -t devtmpfs) ]]; then
-	/bin/mount devtmpfs /dev -t devtmpfs
-fi
-
-/bin/mount sysfs /sys -t sysfs
-/bin/mount bpffs /sys/fs/bpf -t bpf
-/bin/mount debugfs /sys/kernel/debug -t debugfs
-
-echo 'Listing currently mounted file systems'
-/bin/mount
-EOF
-chmod 755 "$root/etc/rcS.d/S10-mount"
-
-cat > "$root/etc/rcS.d/S40-network" << "EOF"
-#!/bin/sh
-
-set -eux
-
-ip link set lo up
-EOF
-chmod 755 "$root/etc/rcS.d/S40-network"
-
-cat > "$root/etc/init.d/rcS" << "EOF"
-#!/bin/sh
-
-set -eux
-
-for path in /etc/rcS.d/S*; do
-	[ -x "$path" ] && "$path"
-done
-EOF
-chmod 755 "$root/etc/init.d/rcS"
-
-chmod 755 "$root"

ci/rootfs/s390x-self-hosted-builder/README.md

@@ -1,108 +0,0 @@
-# IBM Z self-hosted builder
-
-libbpf CI uses an IBM-provided z15 self-hosted builder. There are no IBM Z
-builds of GitHub (GH) Actions runner, and stable qemu-user has problems with .NET
-apps, so the builder runs the x86_64 runner version with qemu-user built from
-the master branch.
-
-We are currently supporting runners for the following repositories:
-* libbpf/libbpf
-* kernel-patches/bpf
-* kernel-patches/vmtest
-
-Below instructions are directly applicable to libbpf, and require minor
-modifications for kernel-patches repos. Currently, qemu-user-static Docker
-image is shared between all GitHub runners, but separate actions-runner-\*
-service / Docker image is created for each runner type.
-
-## Configuring the builder.
-
-### Install prerequisites.
-
-```
-$ sudo apt install -y docker.io  # Ubuntu
-```
-
-### Add services.
-
-```
-$ sudo cp *.service /etc/systemd/system/
-$ sudo systemctl daemon-reload
-```
-
-### Create a config file.
-
-```
-$ sudo tee /etc/actions-runner-libbpf
-repo=<owner>/<name>
-access_token=<ghp_***>
-runner_name=<hostname>
-```
-
-Access token should have the repo scope, consult
-https://docs.github.com/en/rest/reference/actions#create-a-registration-token-for-a-repository
-for details.
-
-### Autostart the x86_64 emulation support.
-
-This step is important, you would not be able to build docker container
-without having this service running. If container build fails, make sure
-service is running properly.
-
-```
-$ sudo systemctl enable --now qemu-user-static
-```
-
-### Autostart the runner.
-
-```
-$ sudo systemctl enable --now actions-runner-libbpf
-```
-
-## Rebuilding the image
-
-In order to update the `iiilinuxibmcom/actions-runner-libbpf` image, e.g. to
-get the latest OS security fixes, use the following commands:
-
-```
-$ sudo docker build \
-      --pull \
-      -f actions-runner-libbpf.Dockerfile \
-      -t iiilinuxibmcom/actions-runner-libbpf \
-      .
-$ sudo systemctl restart actions-runner-libbpf
-```
-
-## Removing persistent data
-
-The `actions-runner-libbpf` service stores various temporary data, such as
-runner registration information, work directories and logs, in the
-`actions-runner-libbpf` volume. In order to remove it and start from scratch,
-e.g. when upgrading the runner or switching it to a different repository, use
-the following commands:
-
-```
-$ sudo systemctl stop actions-runner-libbpf
-$ sudo docker rm -f actions-runner-libbpf
-$ sudo docker volume rm actions-runner-libbpf
-```
-
-## Troubleshooting
-
-In order to check if service is running, use the following command:
-
-```
-$ sudo systemctl status <service name>
-```
-
-In order to get logs for service:
-
-```
-$ journalctl -u <service name>
-```
-
-In order to check which containers are currently active:
-
-```
-$ sudo docker ps
-```

ci/rootfs/s390x-self-hosted-builder/actions-runner-libbpf.Dockerfile

@@ -1,52 +0,0 @@
-# Self-Hosted IBM Z Github Actions Runner.
-
-# Temporary image: amd64 dependencies.
-FROM amd64/ubuntu:20.04 as ld-prefix
-ENV DEBIAN_FRONTEND=noninteractive
-RUN apt-get update && apt-get -y install ca-certificates libicu66 libssl1.1
-
-# Main image.
-FROM s390x/ubuntu:20.04
-
-# Packages for libbpf testing that are not installed by .github/actions/setup.
-ENV DEBIAN_FRONTEND=noninteractive
-RUN apt-get update && apt-get -y install \
-        bc \
-        bison \
-        cmake \
-        cpu-checker \
-        curl \
-        flex \
-        git \
-        jq \
-        linux-image-generic \
-        qemu-system-s390x \
-        rsync \
-        software-properties-common \
-        sudo \
-        tree \
-        iproute2 \
-        iputils-ping
-
-# amd64 dependencies.
-COPY --from=ld-prefix / /usr/x86_64-linux-gnu/
-RUN ln -fs ../lib/x86_64-linux-gnu/ld-linux-x86-64.so.2 /usr/x86_64-linux-gnu/lib64/
-RUN ln -fs /etc/resolv.conf /usr/x86_64-linux-gnu/etc/
-ENV QEMU_LD_PREFIX=/usr/x86_64-linux-gnu
-
-# amd64 Github Actions Runner.
-ARG version=2.296.0
-RUN useradd -m actions-runner
-RUN echo "actions-runner ALL=(ALL) NOPASSWD: ALL" >>/etc/sudoers
-RUN echo "Defaults env_keep += \"DEBIAN_FRONTEND\"" >>/etc/sudoers
-RUN usermod -a -G kvm actions-runner
-USER actions-runner
-ENV USER=actions-runner
-WORKDIR /home/actions-runner
-RUN curl -L https://github.com/actions/runner/releases/download/v${version}/actions-runner-linux-x64-${version}.tar.gz | tar -xz
-VOLUME /home/actions-runner
-
-# Scripts.
-COPY fs/ /
-ENTRYPOINT ["/usr/bin/entrypoint"]
-CMD ["/usr/bin/actions-runner"]

ci/rootfs/s390x-self-hosted-builder/actions-runner-libbpf.service

@@ -1,24 +0,0 @@
-[Unit]
-Description=Self-Hosted IBM Z Github Actions Runner
-Wants=qemu-user-static
-After=qemu-user-static
-StartLimitIntervalSec=0
-
-[Service]
-Type=simple
-Restart=always
-ExecStart=/usr/bin/docker run \
-              --device=/dev/kvm \
-              --env-file=/etc/actions-runner-libbpf \
-              --init \
-              --interactive \
-              --name=actions-runner-libbpf \
-              --rm \
-              --volume=actions-runner-libbpf:/home/actions-runner \
-              iiilinuxibmcom/actions-runner-libbpf
-ExecStop=/bin/sh -c "docker exec actions-runner-libbpf kill -INT -- -1"
-ExecStop=/bin/sh -c "docker wait actions-runner-libbpf"
-ExecStop=/bin/sh -c "docker rm actions-runner-libbpf"
-
-[Install]
-WantedBy=multi-user.target

ci/rootfs/s390x-self-hosted-builder/fs/usr/bin/actions-runner

@@ -1,41 +0,0 @@
-#!/bin/bash
-
-#
-# Ephemeral runner startup script.
-#
-# Expects the following environment variables:
-#
-# - repo=<owner>/<name>
-# - access_token=<ghp_***>
-# - runner_name=<hostname>
-
-set -e -u
-
-# Check the cached registration token.
-token_file=registration-token.json
-set +e
-expires_at=$(jq --raw-output .expires_at "$token_file" 2>/dev/null)
-status=$?
-set -e
-if [[ $status -ne 0 || $(date +%s) -ge $(date -d "$expires_at" +%s) ]]; then
-    # Refresh the cached registration token.
-    curl \
-        -X POST \
-        -H "Accept: application/vnd.github.v3+json" \
-        -H "Authorization: token $access_token" \
-        "https://api.github.com/repos/$repo/actions/runners/registration-token" \
-        -o "$token_file"
-fi
-
-# (Re-)register the runner.
-registration_token=$(jq --raw-output .token "$token_file")
-./config.sh remove --token "$registration_token" || true
-./config.sh \
-    --url "https://github.com/$repo" \
-    --token "$registration_token" \
-    --labels z15 \
-    --name "$runner_name" \
-    --ephemeral
-
-# Run one job.
-./run.sh

ci/rootfs/s390x-self-hosted-builder/fs/usr/bin/entrypoint

@@ -1,35 +0,0 @@
-#!/bin/bash
-
-#
-# Container entrypoint that waits for all spawned processes.
-#
-
-set -e -u
-
-# /dev/kvm has host permissions, fix it.
-if [ -e /dev/kvm ]; then
-    sudo chown root:kvm /dev/kvm
-fi
-
-# Create a FIFO and start reading from its read end.
-tempdir=$(mktemp -d "/tmp/done.XXXXXXXXXX")
-trap 'rm -r "$tempdir"' EXIT
-done="$tempdir/pipe"
-mkfifo "$done"
-cat "$done" & waiter=$!
-
-# Start the workload. Its descendants will inherit the FIFO's write end.
-status=0
-if [ "$#" -eq 0 ]; then
-    bash 9>"$done" || status=$?
-else
-    "$@" 9>"$done" || status=$?
-fi
-
-# When the workload and all of its descendants exit, the FIFO's write end will
-# be closed and `cat "$done"` will exit. Wait until it happens. This is needed
-# in order to handle SelfUpdater, which the workload may start in background
-# before exiting.
-wait "$waiter"
-
-exit "$status"

ci/rootfs/s390x-self-hosted-builder/qemu-user-static.service

@@ -1,11 +0,0 @@
-[Unit]
-Description=Support for transparent execution of non-native binaries with QEMU user emulation
-
-[Service]
-Type=oneshot
-# The source code for iiilinuxibmcom/qemu-user-static is at https://github.com/iii-i/qemu-user-static/tree/v6.1.0-1
-# TODO: replace it with multiarch/qemu-user-static once version >6.1 is available
-ExecStart=/usr/bin/docker run --rm --interactive --privileged iiilinuxibmcom/qemu-user-static --reset -p yes
-
-[Install]
-WantedBy=multi-user.target

ci/vmtest/configs/ALLOWLIST-4.9.0

@@ -1,8 +0,0 @@
-# btf_dump -- need to disable data dump sub-tests
-core_retro
-cpu_mask
-hashmap
-legacy_printk
-perf_buffer
-section_names
-

ci/vmtest/configs/ALLOWLIST-5.5.0

@@ -1,55 +0,0 @@
-# attach_probe
-autoload
-bpf_verif_scale
-cgroup_attach_autodetach
-cgroup_attach_override
-core_autosize
-core_extern
-core_read_macros
-core_reloc
-core_retro
-cpu_mask
-endian
-get_branch_snapshot
-get_stackid_cannot_attach
-global_data
-global_data_init
-global_func_args
-hashmap
-l4lb_all
-legacy_printk
-linked_funcs
-linked_maps
-map_lock
-obj_name
-perf_buffer
-perf_event_stackmap
-pinning
-pkt_md_access
-probe_user
-queue_stack_map
-raw_tp_writable_reject_nbd_invalid
-raw_tp_writable_test_run
-rdonly_maps
-section_names
-signal_pending
-skeleton
-sockmap_ktls
-sockopt
-sockopt_inherit
-sockopt_multi
-spinlock
-stacktrace_map
-stacktrace_map_raw_tp
-static_linked
-task_fd_query_rawtp
-task_fd_query_tp
-tc_bpf
-tcp_estats
-tcp_rtt
-tp_attach_query
-usdt/urand_pid_attach
-xdp
-xdp_info
-xdp_noinline
-xdp_perf

ci/vmtest/configs/DENYLIST-5.5.0

@@ -1,118 +0,0 @@
-# This file is not used and is there for historic purposes only.
-# See ALLOWLIST-5.5.0 instead.
-
-# PERMANENTLY DISABLED
-align			# verifier output format changed
-atomics			# new atomic operations (v5.12+)
-atomic_bounds		# new atomic operations (v5.12+)
-bind_perm		# changed semantics of return values (v5.12+)
-bpf_cookie		# 5.15+
-bpf_iter		# bpf_iter support is missing
-bpf_obj_id		# bpf_link support missing for GET_OBJ_INFO, GET_FD_BY_ID, etc
-bpf_tcp_ca		# STRUCT_OPS is missing
-btf_map_in_map		# inner map leak fixed in 5.8
-btf_skc_cls_ingress	# v5.10+ functionality
-cg_storage_multi	# v5.9+ functionality
-cgroup_attach_multi	# BPF_F_REPLACE_PROG missing
-cgroup_link		# LINK_CREATE is missing
-cgroup_skb_sk_lookup	# bpf_sk_lookup_tcp() helper is missing
-check_mtu		# missing BPF helper (v5.12+)
-cls_redirect		# bpf_csum_level() helper is missing
-connect_force_port	# cgroup/get{peer,sock}name{4,6} support is missing
-d_path			# v5.10+ feature
-enable_stats		# BPF_ENABLE_STATS support is missing
-fentry_fexit		# bpf_prog_test_tracing missing
-fentry_test		# bpf_prog_test_tracing missing
-fexit_bpf2bpf		# freplace is missing
-fexit_sleep		# relies on bpf_trampoline fix in 5.12+
-fexit_test		# bpf_prog_test_tracing missing
-flow_dissector		# bpf_link-based flow dissector is in 5.8+
-flow_dissector_reattach
-for_each		# v5.12+
-get_func_ip_test	# v5.15+
-get_stack_raw_tp	# exercising BPF verifier bug causing infinite loop
-hash_large_key		# v5.11+
-ima			# v5.11+
-kfree_skb		# 32-bit pointer arith in test_pkt_access
-ksyms			# __start_BTF has different name
-kfunc_call		# v5.13+
-link_pinning		# bpf_link is missing
-linked_vars		# v5.13+
-load_bytes_relative	# new functionality in 5.8
-lookup_and_delete	# v5.14+
-map_init		# per-CPU LRU missing
-map_ptr			# test uses BPF_MAP_TYPE_RINGBUF, added in 5.8
-metadata		# v5.10+
-migrate_reuseport	# v5.14+
-mmap			# 5.5 kernel is too permissive with re-mmaping
-modify_return		# fmod_ret support is missing
-module_attach		# module BTF support missing (v5.11+)
-netcnt
-netns_cookie		# v5.15+
-ns_current_pid_tgid	# bpf_get_ns_current_pid_tgid() helper is missing
-pe_preserve_elems	# v5.10+
-perf_branches		# bpf_read_branch_records() helper is missing
-perf_link		# v5.15+
-pkt_access		# 32-bit pointer arith in test_pkt_access
-probe_read_user_str	# kernel bug with garbage bytes at the end
-prog_run_xattr		# 32-bit pointer arith in test_pkt_access
-raw_tp_test_run		# v5.10+
-recursion		# v5.12+
-ringbuf			# BPF_MAP_TYPE_RINGBUF is supported in 5.8+
-
-# bug in verifier w/ tracking references
-#reference_tracking/classifier/sk_lookup_success
-reference_tracking
-
-select_reuseport	# UDP support is missing
-send_signal		# bpf_send_signal_thread() helper is missing
-sk_assign		# bpf_sk_assign helper missing
-sk_lookup		# v5.9+
-sk_storage_tracing	# missing bpf_sk_storage_get() helper
-skb_ctx			# ctx_{size, }_{in, out} in BPF_PROG_TEST_RUN is missing
-skb_helpers		# helpers added in 5.8+
-skeleton		# creates too big ARRAY map
-snprintf		# v5.13+
-snprintf_btf		# v5.10+
-sock_fields		# v5.10+
-socket_cookie		# v5.12+
-sockmap_basic		# uses new socket fields, 5.8+
-sockmap_listen		# no listen socket supportin SOCKMAP
-sockopt_sk
-sockopt_qos_to_cc	# v5.15+
-stacktrace_build_id	# v5.9+
-stack_var_off		# v5.12+
-syscall			# v5.14+
-task_local_storage	# v5.12+
-task_pt_regs		# v5.15+
-tcp_hdr_options		# v5.10+, new TCP header options feature in BPF
-tcpbpf_user		# LINK_CREATE is missing
-tc_redirect		# v5.14+
-test_bpffs		# v5.10+, new CONFIG_BPF_PRELOAD=y and CONFIG_BPF_PRELOAD_UMG=y|m
-test_bprm_opts		# v5.11+
-test_global_funcs	# kernel doesn't support BTF linkage=global on FUNCs
-test_local_storage	# v5.10+ feature
-test_lsm		# no BPF_LSM support
-test_overhead		# no fmod_ret support
-test_profiler		# needs verifier logic improvements from v5.10+
-test_skb_pkt_end	# v5.11+
-timer			# v5.15+
-timer_mim		# v5.15+
-trace_ext		# v5.10+
-trace_printk		# v5.14+
-trampoline_count	# v5.12+ have lower allowed limits
-udp_limit		# no cgroup/sock_release BPF program type (5.9+)
-varlen			# verifier bug fixed in later kernels
-vmlinux			# hrtimer_nanosleep() signature changed incompatibly
-xdp_adjust_tail		# new XDP functionality added in 5.8
-xdp_attach		# IFLA_XDP_EXPECTED_FD support is missing
-xdp_bonding		# v5.15+
-xdp_bpf2bpf		# freplace is missing
-xdp_context_test_run	# v5.15+
-xdp_cpumap_attach	# v5.9+
-xdp_devmap_attach	# new feature in 5.8
-xdp_link		# v5.9+
-
-# SUBTESTS FAILING (block entire test until blocking subtests works properly)
-btf			# "size check test", "func (Non zero vlen)"
-tailcalls		# tailcall_bpf2bpf_1, tailcall_bpf2bpf_2, tailcall_bpf2bpf_3

ci/vmtest/configs/DENYLIST-latest.s390x

@@ -1,6 +0,0 @@
-# TEMPORARY until bpf-next -> bpf merge
-lru_bug                                  # prog 'printk': failed to auto-attach: -524
-
-# TEMPORARY
-usdt/basic                               # failing verifier due to bounds check after LLVM update
-usdt/multispec                           # same as above

ci/vmtest/helpers.sh

@@ -1,36 +0,0 @@
-# $1 - start or end
-# $2 - fold identifier, no spaces
-# $3 - fold section description
-foldable() {
-  local YELLOW='\033[1;33m'
-  local NOCOLOR='\033[0m'
-  if [ $1 = "start" ]; then
-    line="::group::$2"
-    if [ ! -z "${3:-}" ]; then
-      line="$line - ${YELLOW}$3${NOCOLOR}"
-    fi
-  else
-    line="::endgroup::"
-  fi
-  echo -e "$line"
-}
-
-__print() {
-  local TITLE=""
-  if [[ -n $2 ]]; then
-      TITLE=" title=$2"
-  fi
-  echo "::$1${TITLE}::$3"
-}
-
-# $1 - title
-# $2 - message
-print_error() {
-  __print error $1 $2
-}
-
-# $1 - title
-# $2 - message
-print_notice() {
-  __print notice $1 $2
-}

ci/vmtest/run_selftests.sh

@@ -1,87 +0,0 @@
-#!/bin/bash
-
-set -euo pipefail
-
-source $(cd $(dirname $0) && pwd)/helpers.sh
-
-ARCH=$(uname -m)
-
-STATUS_FILE=/exitstatus
-
-read_lists() {
-	(for path in "$@"; do
-		if [[ -s "$path" ]]; then
-			cat "$path"
-		fi;
-	done) | cut -d'#' -f1 | tr -s ' \t\n' ','
-}
-
-test_progs() {
-	if [[ "${KERNEL}" != '4.9.0' ]]; then
-		foldable start test_progs "Testing test_progs"
-		# "&& true" does not change the return code (it is not executed
-		# if the Python script fails), but it prevents exiting on a
-		# failure due to the "set -e".
-		./test_progs ${DENYLIST:+-d$DENYLIST} ${ALLOWLIST:+-a$ALLOWLIST} && true
-		echo "test_progs:$?" >> "${STATUS_FILE}"
-		foldable end test_progs
-	fi
-}
-
-test_progs_no_alu32() {
-	foldable start test_progs-no_alu32 "Testing test_progs-no_alu32"
-	./test_progs-no_alu32 ${DENYLIST:+-d$DENYLIST} ${ALLOWLIST:+-a$ALLOWLIST} && true
-	echo "test_progs-no_alu32:$?" >> "${STATUS_FILE}"
-	foldable end test_progs-no_alu32
-}
-
-test_maps() {
-	if [[ "${KERNEL}" == 'latest' ]]; then
-		foldable start test_maps "Testing test_maps"
-		./test_maps && true
-		echo "test_maps:$?" >> "${STATUS_FILE}"
-		foldable end test_maps
-	fi
-}
-
-test_verifier() {
-	if [[ "${KERNEL}" == 'latest' ]]; then
-		foldable start test_verifier "Testing test_verifier"
-		./test_verifier && true
-		echo "test_verifier:$?" >> "${STATUS_FILE}"
-		foldable end test_verifier
-	fi
-}
-
-foldable end vm_init
-
-configs_path=/${PROJECT_NAME}/selftests/bpf
-local_configs_path=${PROJECT_NAME}/vmtest/configs
-DENYLIST=$(read_lists \
-	"$configs_path/DENYLIST" \
-	"$configs_path/DENYLIST.${ARCH}" \
-	"$local_configs_path/DENYLIST-${KERNEL}" \
-	"$local_configs_path/DENYLIST-${KERNEL}.${ARCH}" \
-)
-ALLOWLIST=$(read_lists \
-	"$configs_path/ALLOWLIST" \
-	"$configs_path/ALLOWLIST.${ARCH}" \
-	"$local_configs_path/ALLOWLIST-${KERNEL}" \
-	"$local_configs_path/ALLOWLIST-${KERNEL}.${ARCH}" \
-)
-
-echo "DENYLIST: ${DENYLIST}"
-echo "ALLOWLIST: ${ALLOWLIST}"
-
-cd ${PROJECT_NAME}/selftests/bpf
-
-if [ $# -eq 0 ]; then
-	test_progs
-	test_progs_no_alu32
-	test_maps
-	test_verifier
-else
-	for test_name in "$@"; do
-		"${test_name}"
-	done
-fi

docs/.gitignore

@@ -1,2 +0,0 @@
-sphinx/build
-sphinx/doxygen/build

docs/api.rst

@@ -1,93 +0,0 @@
-.. SPDX-License-Identifier: (LGPL-2.1 OR BSD-2-Clause)
-
-.. _api:
-
-.. toctree:: Table of Contents
-
-
-LIBBPF API
-==========
-
-Error Handling
---------------
-
-When libbpf is used in "libbpf 1.0 mode", API functions can return errors in one of two ways.
-
-You can set "libbpf 1.0" mode with the following line:
-
-.. code-block::
-
-    libbpf_set_strict_mode(LIBBPF_STRICT_DIRECT_ERRS | LIBBPF_STRICT_CLEAN_PTRS);
-
-If the function returns an error code directly, it uses 0 to indicate success
-and a negative error code to indicate what caused the error. In this case the
-error code should be checked directly from the return, you do not need to check
-errno.
-
-For example:
-
-.. code-block::
-
-    err = some_libbpf_api_with_error_return(...);
-    if (err < 0) {
-        /* Handle error accordingly */
-    }
-
-If the function returns a pointer, it will return NULL to indicate there was
-an error. In this case errno should be checked for the error code.
-
-For example:
-
-.. code-block::
-
-    ptr = some_libbpf_api_returning_ptr();
-    if (!ptr) {
-        /* note no minus sign for EINVAL and E2BIG below */
-        if (errno == EINVAL) {
-           /* handle EINVAL error */
-        } else if (errno == E2BIG) {
-           /* handle E2BIG error */
-        }
-    }
-
-libbpf.h
---------
-.. doxygenfile:: libbpf.h
-   :project: libbpf
-   :sections: func define public-type enum
-
-bpf.h
------
-.. doxygenfile:: bpf.h
-   :project: libbpf
-   :sections: func define public-type enum
-
-btf.h
------
-.. doxygenfile:: btf.h
-   :project: libbpf
-   :sections: func define public-type enum
-
-xsk.h
------
-.. doxygenfile:: xsk.h
-   :project: libbpf
-   :sections: func define public-type enum
-
-bpf_tracing.h
--------------
-.. doxygenfile:: bpf_tracing.h
-   :project: libbpf
-   :sections: func define public-type enum
-
-bpf_core_read.h
----------------
-.. doxygenfile:: bpf_core_read.h
-   :project: libbpf
-   :sections: func define public-type enum
-
-bpf_endian.h
-------------
-.. doxygenfile:: bpf_endian.h
-   :project: libbpf
-   :sections: func define public-type enum

docs/conf.py

@@ -1,40 +0,0 @@
-#!/usr/bin/env python3
-# SPDX-License-Identifier: GPL-2.0
-# Configuration file for the Sphinx documentation builder.
-#
-# This file only contains a selection of the most common options. For a full
-# list see the documentation:
-# https://www.sphinx-doc.org/en/master/usage/configuration.html
-
-import os
-import subprocess
-
-project = "libbpf"
-
-extensions = [
-    'sphinx.ext.autodoc',
-    'sphinx.ext.doctest',
-    'sphinx.ext.mathjax',
-    'sphinx.ext.viewcode',
-    'sphinx.ext.imgmath',
-    'sphinx.ext.todo',
-    'breathe',
-]
-
-# List of patterns, relative to source directory, that match files and
-# directories to ignore when looking for source files.
-# This pattern also affects html_static_path and html_extra_path.
-exclude_patterns = []
-
-read_the_docs_build = os.environ.get('READTHEDOCS', None) == 'True'
-
-if read_the_docs_build:
-    subprocess.call('cd sphinx ; make clean', shell=True)
-    subprocess.call('cd sphinx/doxygen ; doxygen', shell=True)
-
-html_theme = 'sphinx_rtd_theme'
-
-breathe_projects = { "libbpf": "./sphinx/doxygen/build/xml/" }
-breathe_default_project = "libbpf"
-breathe_show_define_initializer = True
-breathe_show_enumvalue_initializer = True

docs/index.rst

@@ -1,21 +0,0 @@
-.. SPDX-License-Identifier: (LGPL-2.1 OR BSD-2-Clause)
-
-libbpf
-======
-
-.. toctree::
-   :maxdepth: 1
-
-   API Documentation <https://libbpf.readthedocs.io/en/latest/api.html>
-   libbpf_naming_convention
-   libbpf_build
-
-This is documentation for libbpf, a userspace library for loading and
-interacting with bpf programs.
-
-All general BPF questions, including kernel functionality, libbpf APIs and
-their application, should be sent to bpf@vger.kernel.org mailing list.
-You can `subscribe <http://vger.kernel.org/vger-lists.html#bpf>`_ to the
-mailing list search its `archive <https://lore.kernel.org/bpf/>`_.
-Please search the archive before asking new questions. It very well might
-be that this was already addressed or answered before.

docs/libbpf_build.rst

@@ -1,37 +0,0 @@
-.. SPDX-License-Identifier: (LGPL-2.1 OR BSD-2-Clause)
-
-Building libbpf
-===============
-
-libelf and zlib are internal dependencies of libbpf and thus are required to link
-against and must be installed on the system for applications to work.
-pkg-config is used by default to find libelf, and the program called
-can be overridden with PKG_CONFIG.
-
-If using pkg-config at build time is not desired, it can be disabled by
-setting NO_PKG_CONFIG=1 when calling make.
-
-To build both static libbpf.a and shared libbpf.so:
-
-.. code-block:: bash
-
-    $ cd src
-    $ make
-
-To build only static libbpf.a library in directory build/ and install them
-together with libbpf headers in a staging directory root/:
-
-.. code-block:: bash
-
-    $ cd src
-    $ mkdir build root
-    $ BUILD_STATIC_ONLY=y OBJDIR=build DESTDIR=root make install
-
-To build both static libbpf.a and shared libbpf.so against a custom libelf
-dependency installed in /build/root/ and install them together with libbpf
-headers in a build directory /build/root/:
-
-.. code-block:: bash
-
-    $ cd src
-    $ PKG_CONFIG_PATH=/build/root/lib64/pkgconfig DESTDIR=/build/root make

docs/sphinx/Makefile

@@ -1,9 +0,0 @@
-SPHINXBUILD   ?= sphinx-build
-SOURCEDIR     = ../src
-BUILDDIR      = build
-
-help:
-	@$(SPHINXBUILD) -M help "$(SOURCEDIR)" "$(BUILDDIR)"
-
-%:
-	@$(SPHINXBUILD) -M $@ "$(SOURCEDIR)" "$(BUILDDIR)"

docs/sphinx/doxygen/Doxyfile

@@ -1,277 +0,0 @@
-DOXYFILE_ENCODING      = UTF-8
-PROJECT_NAME           = "libbpf"
-PROJECT_NUMBER         =
-PROJECT_BRIEF          =
-PROJECT_LOGO           =
-OUTPUT_DIRECTORY       = ./build
-CREATE_SUBDIRS         = NO
-ALLOW_UNICODE_NAMES    = NO
-OUTPUT_LANGUAGE        = English
-OUTPUT_TEXT_DIRECTION  = None
-BRIEF_MEMBER_DESC      = YES
-REPEAT_BRIEF           = YES
-ALWAYS_DETAILED_SEC    = NO
-INLINE_INHERITED_MEMB  = NO
-FULL_PATH_NAMES        = YES
-STRIP_FROM_PATH        =
-STRIP_FROM_INC_PATH    =
-SHORT_NAMES            = NO
-JAVADOC_AUTOBRIEF      = NO
-JAVADOC_BANNER         = NO
-QT_AUTOBRIEF           = NO
-MULTILINE_CPP_IS_BRIEF = NO
-PYTHON_DOCSTRING       = NO
-INHERIT_DOCS           = YES
-SEPARATE_MEMBER_PAGES  = NO
-TAB_SIZE               = 4
-ALIASES                =
-OPTIMIZE_OUTPUT_FOR_C  = YES
-OPTIMIZE_OUTPUT_JAVA   = NO
-OPTIMIZE_FOR_FORTRAN   = NO
-OPTIMIZE_OUTPUT_VHDL   = NO
-OPTIMIZE_OUTPUT_SLICE  = NO
-EXTENSION_MAPPING      =
-MARKDOWN_SUPPORT       = YES
-TOC_INCLUDE_HEADINGS   = 5
-AUTOLINK_SUPPORT       = YES
-BUILTIN_STL_SUPPORT    = NO
-CPP_CLI_SUPPORT        = NO
-SIP_SUPPORT            = NO
-IDL_PROPERTY_SUPPORT   = YES
-DISTRIBUTE_GROUP_DOC   = NO
-GROUP_NESTED_COMPOUNDS = NO
-SUBGROUPING            = YES
-INLINE_GROUPED_CLASSES = NO
-INLINE_SIMPLE_STRUCTS  = NO
-TYPEDEF_HIDES_STRUCT   = NO
-LOOKUP_CACHE_SIZE      = 0
-NUM_PROC_THREADS       = 1
-EXTRACT_ALL            = NO
-EXTRACT_PRIVATE        = NO
-EXTRACT_PRIV_VIRTUAL   = NO
-EXTRACT_PACKAGE        = NO
-EXTRACT_STATIC         = NO
-EXTRACT_LOCAL_CLASSES  = YES
-EXTRACT_LOCAL_METHODS  = NO
-EXTRACT_ANON_NSPACES   = NO
-RESOLVE_UNNAMED_PARAMS = YES
-HIDE_UNDOC_MEMBERS     = NO
-HIDE_UNDOC_CLASSES     = NO
-HIDE_FRIEND_COMPOUNDS  = NO
-HIDE_IN_BODY_DOCS      = NO
-INTERNAL_DOCS          = NO
-CASE_SENSE_NAMES       = YES
-HIDE_SCOPE_NAMES       = NO
-HIDE_COMPOUND_REFERENCE= NO
-SHOW_INCLUDE_FILES     = YES
-SHOW_GROUPED_MEMB_INC  = NO
-FORCE_LOCAL_INCLUDES   = NO
-INLINE_INFO            = YES
-SORT_MEMBER_DOCS       = YES
-SORT_BRIEF_DOCS        = NO
-SORT_MEMBERS_CTORS_1ST = NO
-SORT_GROUP_NAMES       = NO
-SORT_BY_SCOPE_NAME     = NO
-STRICT_PROTO_MATCHING  = NO
-GENERATE_TODOLIST      = YES
-GENERATE_TESTLIST      = YES
-GENERATE_BUGLIST       = YES
-GENERATE_DEPRECATEDLIST= YES
-ENABLED_SECTIONS       =
-MAX_INITIALIZER_LINES  = 30
-SHOW_USED_FILES        = YES
-SHOW_FILES             = YES
-SHOW_NAMESPACES        = YES
-FILE_VERSION_FILTER    =
-LAYOUT_FILE            =
-CITE_BIB_FILES         =
-QUIET                  = NO
-WARNINGS               = YES
-WARN_IF_UNDOCUMENTED   = YES
-WARN_IF_DOC_ERROR      = YES
-WARN_NO_PARAMDOC       = NO
-WARN_AS_ERROR          = NO
-WARN_FORMAT            = "$file:$line: $text"
-WARN_LOGFILE           =
-INPUT                  = ../../../src
-INPUT_ENCODING         = UTF-8
-FILE_PATTERNS          = *.c \
-                         *.h
-RECURSIVE              = NO
-EXCLUDE                =
-EXCLUDE_SYMLINKS       = NO
-EXCLUDE_PATTERNS       =
-EXCLUDE_SYMBOLS        = ___*
-EXAMPLE_PATH           =
-EXAMPLE_PATTERNS       = *
-EXAMPLE_RECURSIVE      = NO
-IMAGE_PATH             =
-INPUT_FILTER           =
-FILTER_PATTERNS        =
-FILTER_SOURCE_FILES    = NO
-FILTER_SOURCE_PATTERNS =
-USE_MDFILE_AS_MAINPAGE = YES
-SOURCE_BROWSER         = NO
-INLINE_SOURCES         = NO
-STRIP_CODE_COMMENTS    = YES
-REFERENCED_BY_RELATION = NO
-REFERENCES_RELATION    = NO
-REFERENCES_LINK_SOURCE = YES
-SOURCE_TOOLTIPS        = YES
-USE_HTAGS              = NO
-VERBATIM_HEADERS       = YES
-ALPHABETICAL_INDEX     = YES
-IGNORE_PREFIX          =
-GENERATE_HTML          = NO
-HTML_OUTPUT            = html
-HTML_FILE_EXTENSION    = .html
-HTML_HEADER            =
-HTML_FOOTER            =
-HTML_STYLESHEET        =
-HTML_EXTRA_STYLESHEET  =
-HTML_EXTRA_FILES       =
-HTML_COLORSTYLE_HUE    = 220
-HTML_COLORSTYLE_SAT    = 100
-HTML_COLORSTYLE_GAMMA  = 80
-HTML_TIMESTAMP         = NO
-HTML_DYNAMIC_MENUS     = YES
-HTML_DYNAMIC_SECTIONS  = NO
-HTML_INDEX_NUM_ENTRIES = 100
-GENERATE_DOCSET        = NO
-DOCSET_FEEDNAME        = "Doxygen generated docs"
-DOCSET_BUNDLE_ID       = org.doxygen.Project
-DOCSET_PUBLISHER_ID    = org.doxygen.Publisher
-DOCSET_PUBLISHER_NAME  = Publisher
-GENERATE_HTMLHELP      = NO
-CHM_FILE               =
-HHC_LOCATION           =
-GENERATE_CHI           = NO
-CHM_INDEX_ENCODING     =
-BINARY_TOC             = NO
-TOC_EXPAND             = NO
-GENERATE_QHP           = NO
-QCH_FILE               =
-QHP_NAMESPACE          = org.doxygen.Project
-QHP_VIRTUAL_FOLDER     = doc
-QHP_CUST_FILTER_NAME   =
-QHP_CUST_FILTER_ATTRS  =
-QHP_SECT_FILTER_ATTRS  =
-QHG_LOCATION           =
-GENERATE_ECLIPSEHELP   = NO
-ECLIPSE_DOC_ID         = org.doxygen.Project
-DISABLE_INDEX          = NO
-GENERATE_TREEVIEW      = NO
-ENUM_VALUES_PER_LINE   = 4
-TREEVIEW_WIDTH         = 250
-EXT_LINKS_IN_WINDOW    = NO
-HTML_FORMULA_FORMAT    = png
-FORMULA_FONTSIZE       = 10
-FORMULA_TRANSPARENT    = YES
-FORMULA_MACROFILE      =
-USE_MATHJAX            = NO
-MATHJAX_FORMAT         = HTML-CSS
-MATHJAX_RELPATH        = https://cdn.jsdelivr.net/npm/mathjax@2
-MATHJAX_EXTENSIONS     =
-MATHJAX_CODEFILE       =
-SEARCHENGINE           = YES
-SERVER_BASED_SEARCH    = NO
-EXTERNAL_SEARCH        = NO
-SEARCHENGINE_URL       =
-SEARCHDATA_FILE        = searchdata.xml
-EXTERNAL_SEARCH_ID     =
-EXTRA_SEARCH_MAPPINGS  =
-GENERATE_LATEX         = NO
-LATEX_OUTPUT           = latex
-LATEX_CMD_NAME         =
-MAKEINDEX_CMD_NAME     = makeindex
-LATEX_MAKEINDEX_CMD    = makeindex
-COMPACT_LATEX          = NO
-PAPER_TYPE             = a4
-EXTRA_PACKAGES         =
-LATEX_HEADER           =
-LATEX_FOOTER           =
-LATEX_EXTRA_STYLESHEET =
-LATEX_EXTRA_FILES      =
-PDF_HYPERLINKS         = YES
-USE_PDFLATEX           = YES
-LATEX_BATCHMODE        = NO
-LATEX_HIDE_INDICES     = NO
-LATEX_SOURCE_CODE      = NO
-LATEX_BIB_STYLE        = plain
-LATEX_TIMESTAMP        = NO
-LATEX_EMOJI_DIRECTORY  =
-GENERATE_RTF           = NO
-RTF_OUTPUT             = rtf
-COMPACT_RTF            = NO
-RTF_HYPERLINKS         = NO
-RTF_STYLESHEET_FILE    =
-RTF_EXTENSIONS_FILE    =
-RTF_SOURCE_CODE        = NO
-GENERATE_MAN           = NO
-MAN_OUTPUT             = man
-MAN_EXTENSION          = .3
-MAN_SUBDIR             =
-MAN_LINKS              = NO
-GENERATE_XML           = YES
-XML_OUTPUT             = xml
-XML_PROGRAMLISTING     = YES
-XML_NS_MEMB_FILE_SCOPE = NO
-GENERATE_DOCBOOK       = NO
-DOCBOOK_OUTPUT         = docbook
-DOCBOOK_PROGRAMLISTING = NO
-GENERATE_AUTOGEN_DEF   = NO
-GENERATE_PERLMOD       = NO
-PERLMOD_LATEX          = NO
-PERLMOD_PRETTY         = YES
-PERLMOD_MAKEVAR_PREFIX =
-ENABLE_PREPROCESSING   = YES
-MACRO_EXPANSION        = NO
-EXPAND_ONLY_PREDEF     = YES
-SEARCH_INCLUDES        = YES
-INCLUDE_PATH           =
-INCLUDE_FILE_PATTERNS  =
-PREDEFINED             =
-EXPAND_AS_DEFINED      =
-SKIP_FUNCTION_MACROS   = NO
-TAGFILES               =
-GENERATE_TAGFILE       =
-ALLEXTERNALS           = NO
-EXTERNAL_GROUPS        = YES
-EXTERNAL_PAGES         = YES
-CLASS_DIAGRAMS         = YES
-DIA_PATH               =
-HIDE_UNDOC_RELATIONS   = YES
-HAVE_DOT               = NO
-DOT_NUM_THREADS        = 0
-DOT_FONTNAME           = Helvetica
-DOT_FONTSIZE           = 10
-DOT_FONTPATH           =
-CLASS_GRAPH            = YES
-COLLABORATION_GRAPH    = YES
-GROUP_GRAPHS           = YES
-UML_LOOK               = NO
-UML_LIMIT_NUM_FIELDS   = 10
-DOT_UML_DETAILS        = NO
-DOT_WRAP_THRESHOLD     = 17
-TEMPLATE_RELATIONS     = NO
-INCLUDE_GRAPH          = YES
-INCLUDED_BY_GRAPH      = YES
-CALL_GRAPH             = NO
-CALLER_GRAPH           = NO
-GRAPHICAL_HIERARCHY    = YES
-DIRECTORY_GRAPH        = YES
-DOT_IMAGE_FORMAT       = png
-INTERACTIVE_SVG        = NO
-DOT_PATH               =
-DOTFILE_DIRS           =
-MSCFILE_DIRS           =
-DIAFILE_DIRS           =
-PLANTUML_JAR_PATH      =
-PLANTUML_CFG_FILE      =
-PLANTUML_INCLUDE_PATH  =
-DOT_GRAPH_MAX_NODES    = 50
-MAX_DOT_GRAPH_DEPTH    = 0
-DOT_TRANSPARENT        = NO
-DOT_MULTI_TARGETS      = NO
-GENERATE_LEGEND        = YES
-DOT_CLEANUP            = YES

docs/sphinx/requirements.txt

@@ -1 +0,0 @@
-breathe

fuzz/bpf-object-fuzzer.c

@@ -1,23 +0,0 @@
-#include "libbpf.h"
-
-static int libbpf_print_fn(enum libbpf_print_level level, const char *format, va_list args)
-{
-	return 0;
-}
-
-int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size) {
-	struct bpf_object *obj = NULL;
-	DECLARE_LIBBPF_OPTS(bpf_object_open_opts, opts);
-	int err;
-
-	libbpf_set_print(libbpf_print_fn);
-
-	opts.object_name = "fuzz-object";
-	obj = bpf_object__open_mem(data, size, &opts);
-	err = libbpf_get_error(obj);
-	if (err)
-		return 0;
-
-	bpf_object__close(obj);
-	return 0;
-}

include/linux/filter.h

@@ -5,22 +5,6 @@
 
 #include <linux/bpf.h>
 
-#define BPF_RAW_INSN(CODE, DST, SRC, OFF, IMM)			\
-	((struct bpf_insn) {					\
-		.code = CODE,					\
-		.dst_reg = DST,					\
-		.src_reg = SRC,					\
-		.off = OFF,					\
-		.imm = IMM })
-
-#define BPF_ALU32_IMM(OP, DST, IMM)				\
-	((struct bpf_insn) {					\
-		.code  = BPF_ALU | BPF_OP(OP) | BPF_K,		\
-		.dst_reg = DST,					\
-		.src_reg = 0,					\
-		.off   = 0,					\
-		.imm   = IMM })
-
 #define BPF_ALU64_IMM(OP, DST, IMM)				\
 	((struct bpf_insn) {					\
 		.code  = BPF_ALU64 | BPF_OP(OP) | BPF_K,	\

include/linux/list.h

@@ -72,20 +72,11 @@ static inline void list_del(struct list_head *entry)
         entry->prev = LIST_POISON2;
 }
 
-static inline int list_empty(const struct list_head *head)
-{
-	return head->next == head;
-}
-
 #define list_entry(ptr, type, member) \
         container_of(ptr, type, member)
 #define list_first_entry(ptr, type, member) \
         list_entry((ptr)->next, type, member)
 #define list_next_entry(pos, member) \
         list_entry((pos)->member.next, typeof(*(pos)), member)
-#define list_for_each_entry(pos, head, member) \
-	for (pos = list_first_entry(head, typeof(*pos), member); \
-	     &pos->member != (head); \
-	     pos = list_next_entry(pos, member))
 
 #endif

include/linux/types.h

@@ -7,8 +7,6 @@
 #include <stddef.h>
 #include <stdint.h>
 
-#include <linux/stddef.h>
-
 #include <asm/types.h>
 #include <asm/posix_types.h>
 

include/tools/libc_compat.h

@@ -0,0 +1,20 @@
+// SPDX-License-Identifier: (LGPL-2.0+ OR BSD-2-Clause)
+/* Copyright (C) 2018 Netronome Systems, Inc. */
+
+#ifndef __TOOLS_LIBC_COMPAT_H
+#define __TOOLS_LIBC_COMPAT_H
+
+#include <stdlib.h>
+#include <linux/overflow.h>
+
+#ifdef COMPAT_NEED_REALLOCARRAY
+static inline void *reallocarray(void *ptr, size_t nmemb, size_t size)
+{
+	size_t bytes;
+
+	if (unlikely(check_mul_overflow(nmemb, size, &bytes)))
+		return NULL;
+	return realloc(ptr, bytes);
+}
+#endif
+#endif

include/uapi/linux/btf.h

@@ -33,17 +33,17 @@ struct btf_type {
 	/* "info" bits arrangement
 	 * bits  0-15: vlen (e.g. # of struct's members)
 	 * bits 16-23: unused
-	 * bits 24-28: kind (e.g. int, ptr, array...etc)
-	 * bits 29-30: unused
+	 * bits 24-27: kind (e.g. int, ptr, array...etc)
+	 * bits 28-30: unused
 	 * bit     31: kind_flag, currently used by
-	 *             struct, union, enum, fwd and enum64
+	 *             struct, union and fwd
 	 */
 	__u32 info;
-	/* "size" is used by INT, ENUM, STRUCT, UNION, DATASEC and ENUM64.
+	/* "size" is used by INT, ENUM, STRUCT, UNION and DATASEC.
 	 * "size" tells the size of the type it is describing.
 	 *
 	 * "type" is used by PTR, TYPEDEF, VOLATILE, CONST, RESTRICT,
-	 * FUNC, FUNC_PROTO, VAR, DECL_TAG and TYPE_TAG.
+	 * FUNC, FUNC_PROTO and VAR.
 	 * "type" is a type_id referring to another type.
 	 */
 	union {
@@ -52,35 +52,28 @@ struct btf_type {
 	};
 };
 
-#define BTF_INFO_KIND(info)	(((info) >> 24) & 0x1f)
+#define BTF_INFO_KIND(info)	(((info) >> 24) & 0x0f)
 #define BTF_INFO_VLEN(info)	((info) & 0xffff)
 #define BTF_INFO_KFLAG(info)	((info) >> 31)
 
-enum {
-	BTF_KIND_UNKN		= 0,	/* Unknown	*/
-	BTF_KIND_INT		= 1,	/* Integer	*/
-	BTF_KIND_PTR		= 2,	/* Pointer	*/
-	BTF_KIND_ARRAY		= 3,	/* Array	*/
-	BTF_KIND_STRUCT		= 4,	/* Struct	*/
-	BTF_KIND_UNION		= 5,	/* Union	*/
-	BTF_KIND_ENUM		= 6,	/* Enumeration up to 32-bit values */
-	BTF_KIND_FWD		= 7,	/* Forward	*/
-	BTF_KIND_TYPEDEF	= 8,	/* Typedef	*/
-	BTF_KIND_VOLATILE	= 9,	/* Volatile	*/
-	BTF_KIND_CONST		= 10,	/* Const	*/
-	BTF_KIND_RESTRICT	= 11,	/* Restrict	*/
-	BTF_KIND_FUNC		= 12,	/* Function	*/
-	BTF_KIND_FUNC_PROTO	= 13,	/* Function Proto	*/
-	BTF_KIND_VAR		= 14,	/* Variable	*/
-	BTF_KIND_DATASEC	= 15,	/* Section	*/
-	BTF_KIND_FLOAT		= 16,	/* Floating point	*/
-	BTF_KIND_DECL_TAG	= 17,	/* Decl Tag */
-	BTF_KIND_TYPE_TAG	= 18,	/* Type Tag */
-	BTF_KIND_ENUM64		= 19,	/* Enumeration up to 64-bit values */
-
-	NR_BTF_KINDS,
-	BTF_KIND_MAX		= NR_BTF_KINDS - 1,
-};
+#define BTF_KIND_UNKN		0	/* Unknown	*/
+#define BTF_KIND_INT		1	/* Integer	*/
+#define BTF_KIND_PTR		2	/* Pointer	*/
+#define BTF_KIND_ARRAY		3	/* Array	*/
+#define BTF_KIND_STRUCT		4	/* Struct	*/
+#define BTF_KIND_UNION		5	/* Union	*/
+#define BTF_KIND_ENUM		6	/* Enumeration	*/
+#define BTF_KIND_FWD		7	/* Forward	*/
+#define BTF_KIND_TYPEDEF	8	/* Typedef	*/
+#define BTF_KIND_VOLATILE	9	/* Volatile	*/
+#define BTF_KIND_CONST		10	/* Const	*/
+#define BTF_KIND_RESTRICT	11	/* Restrict	*/
+#define BTF_KIND_FUNC		12	/* Function	*/
+#define BTF_KIND_FUNC_PROTO	13	/* Function Proto	*/
+#define BTF_KIND_VAR		14	/* Variable	*/
+#define BTF_KIND_DATASEC	15	/* Section	*/
+#define BTF_KIND_MAX		BTF_KIND_DATASEC
+#define NR_BTF_KINDS		(BTF_KIND_MAX + 1)
 
 /* For some specific BTF_KIND, "struct btf_type" is immediately
  * followed by extra data.
@@ -176,25 +169,4 @@ struct btf_var_secinfo {
 	__u32	size;
 };
 
-/* BTF_KIND_DECL_TAG is followed by a single "struct btf_decl_tag" to describe
- * additional information related to the tag applied location.
- * If component_idx == -1, the tag is applied to a struct, union,
- * variable or function. Otherwise, it is applied to a struct/union
- * member or a func argument, and component_idx indicates which member
- * or argument (0 ... vlen-1).
- */
-struct btf_decl_tag {
-       __s32   component_idx;
-};
-
-/* BTF_KIND_ENUM64 is followed by multiple "struct btf_enum64".
- * The exact number of btf_enum64 is stored in the vlen (of the
- * info in "struct btf_type").
- */
-struct btf_enum64 {
-	__u32	name_off;
-	__u32	val_lo32;
-	__u32	val_hi32;
-};
-
 #endif /* _UAPI__LINUX_BTF_H__ */

include/uapi/linux/if_link.h

@@ -7,23 +7,24 @@
 
 /* This struct should be in sync with struct rtnl_link_stats64 */
 struct rtnl_link_stats {
-	__u32	rx_packets;
-	__u32	tx_packets;
-	__u32	rx_bytes;
-	__u32	tx_bytes;
-	__u32	rx_errors;
-	__u32	tx_errors;
-	__u32	rx_dropped;
-	__u32	tx_dropped;
-	__u32	multicast;
+	__u32	rx_packets;		/* total packets received	*/
+	__u32	tx_packets;		/* total packets transmitted	*/
+	__u32	rx_bytes;		/* total bytes received 	*/
+	__u32	tx_bytes;		/* total bytes transmitted	*/
+	__u32	rx_errors;		/* bad packets received		*/
+	__u32	tx_errors;		/* packet transmit problems	*/
+	__u32	rx_dropped;		/* no space in linux buffers	*/
+	__u32	tx_dropped;		/* no space available in linux	*/
+	__u32	multicast;		/* multicast packets received	*/
 	__u32	collisions;
+
 	/* detailed rx_errors: */
 	__u32	rx_length_errors;
-	__u32	rx_over_errors;
-	__u32	rx_crc_errors;
-	__u32	rx_frame_errors;
-	__u32	rx_fifo_errors;
-	__u32	rx_missed_errors;
+	__u32	rx_over_errors;		/* receiver ring buff overflow	*/
+	__u32	rx_crc_errors;		/* recved pkt with crc error	*/
+	__u32	rx_frame_errors;	/* recv'd frame alignment error */
+	__u32	rx_fifo_errors;		/* recv'r fifo overrun		*/
+	__u32	rx_missed_errors;	/* receiver missed packet	*/
 
 	/* detailed tx_errors */
 	__u32	tx_aborted_errors;
@@ -36,201 +37,29 @@ struct rtnl_link_stats {
 	__u32	rx_compressed;
 	__u32	tx_compressed;
 
-	__u32	rx_nohandler;
+	__u32	rx_nohandler;		/* dropped, no handler found	*/
 };
 
-/**
- * struct rtnl_link_stats64 - The main device statistics structure.
- *
- * @rx_packets: Number of good packets received by the interface.
- *   For hardware interfaces counts all good packets received from the device
- *   by the host, including packets which host had to drop at various stages
- *   of processing (even in the driver).
- *
- * @tx_packets: Number of packets successfully transmitted.
- *   For hardware interfaces counts packets which host was able to successfully
- *   hand over to the device, which does not necessarily mean that packets
- *   had been successfully transmitted out of the device, only that device
- *   acknowledged it copied them out of host memory.
- *
- * @rx_bytes: Number of good received bytes, corresponding to @rx_packets.
- *
- *   For IEEE 802.3 devices should count the length of Ethernet Frames
- *   excluding the FCS.
- *
- * @tx_bytes: Number of good transmitted bytes, corresponding to @tx_packets.
- *
- *   For IEEE 802.3 devices should count the length of Ethernet Frames
- *   excluding the FCS.
- *
- * @rx_errors: Total number of bad packets received on this network device.
- *   This counter must include events counted by @rx_length_errors,
- *   @rx_crc_errors, @rx_frame_errors and other errors not otherwise
- *   counted.
- *
- * @tx_errors: Total number of transmit problems.
- *   This counter must include events counter by @tx_aborted_errors,
- *   @tx_carrier_errors, @tx_fifo_errors, @tx_heartbeat_errors,
- *   @tx_window_errors and other errors not otherwise counted.
- *
- * @rx_dropped: Number of packets received but not processed,
- *   e.g. due to lack of resources or unsupported protocol.
- *   For hardware interfaces this counter may include packets discarded
- *   due to L2 address filtering but should not include packets dropped
- *   by the device due to buffer exhaustion which are counted separately in
- *   @rx_missed_errors (since procfs folds those two counters together).
- *
- * @tx_dropped: Number of packets dropped on their way to transmission,
- *   e.g. due to lack of resources.
- *
- * @multicast: Multicast packets received.
- *   For hardware interfaces this statistic is commonly calculated
- *   at the device level (unlike @rx_packets) and therefore may include
- *   packets which did not reach the host.
- *
- *   For IEEE 802.3 devices this counter may be equivalent to:
- *
- *    - 30.3.1.1.21 aMulticastFramesReceivedOK
- *
- * @collisions: Number of collisions during packet transmissions.
- *
- * @rx_length_errors: Number of packets dropped due to invalid length.
- *   Part of aggregate "frame" errors in `/proc/net/dev`.
- *
- *   For IEEE 802.3 devices this counter should be equivalent to a sum
- *   of the following attributes:
- *
- *    - 30.3.1.1.23 aInRangeLengthErrors
- *    - 30.3.1.1.24 aOutOfRangeLengthField
- *    - 30.3.1.1.25 aFrameTooLongErrors
- *
- * @rx_over_errors: Receiver FIFO overflow event counter.
- *
- *   Historically the count of overflow events. Such events may be
- *   reported in the receive descriptors or via interrupts, and may
- *   not correspond one-to-one with dropped packets.
- *
- *   The recommended interpretation for high speed interfaces is -
- *   number of packets dropped because they did not fit into buffers
- *   provided by the host, e.g. packets larger than MTU or next buffer
- *   in the ring was not available for a scatter transfer.
- *
- *   Part of aggregate "frame" errors in `/proc/net/dev`.
- *
- *   This statistics was historically used interchangeably with
- *   @rx_fifo_errors.
- *
- *   This statistic corresponds to hardware events and is not commonly used
- *   on software devices.
- *
- * @rx_crc_errors: Number of packets received with a CRC error.
- *   Part of aggregate "frame" errors in `/proc/net/dev`.
- *
- *   For IEEE 802.3 devices this counter must be equivalent to:
- *
- *    - 30.3.1.1.6 aFrameCheckSequenceErrors
- *
- * @rx_frame_errors: Receiver frame alignment errors.
- *   Part of aggregate "frame" errors in `/proc/net/dev`.
- *
- *   For IEEE 802.3 devices this counter should be equivalent to:
- *
- *    - 30.3.1.1.7 aAlignmentErrors
- *
- * @rx_fifo_errors: Receiver FIFO error counter.
- *
- *   Historically the count of overflow events. Those events may be
- *   reported in the receive descriptors or via interrupts, and may
- *   not correspond one-to-one with dropped packets.
- *
- *   This statistics was used interchangeably with @rx_over_errors.
- *   Not recommended for use in drivers for high speed interfaces.
- *
- *   This statistic is used on software devices, e.g. to count software
- *   packet queue overflow (can) or sequencing errors (GRE).
- *
- * @rx_missed_errors: Count of packets missed by the host.
- *   Folded into the "drop" counter in `/proc/net/dev`.
- *
- *   Counts number of packets dropped by the device due to lack
- *   of buffer space. This usually indicates that the host interface
- *   is slower than the network interface, or host is not keeping up
- *   with the receive packet rate.
- *
- *   This statistic corresponds to hardware events and is not used
- *   on software devices.
- *
- * @tx_aborted_errors:
- *   Part of aggregate "carrier" errors in `/proc/net/dev`.
- *   For IEEE 802.3 devices capable of half-duplex operation this counter
- *   must be equivalent to:
- *
- *    - 30.3.1.1.11 aFramesAbortedDueToXSColls
- *
- *   High speed interfaces may use this counter as a general device
- *   discard counter.
- *
- * @tx_carrier_errors: Number of frame transmission errors due to loss
- *   of carrier during transmission.
- *   Part of aggregate "carrier" errors in `/proc/net/dev`.
- *
- *   For IEEE 802.3 devices this counter must be equivalent to:
- *
- *    - 30.3.1.1.13 aCarrierSenseErrors
- *
- * @tx_fifo_errors: Number of frame transmission errors due to device
- *   FIFO underrun / underflow. This condition occurs when the device
- *   begins transmission of a frame but is unable to deliver the
- *   entire frame to the transmitter in time for transmission.
- *   Part of aggregate "carrier" errors in `/proc/net/dev`.
- *
- * @tx_heartbeat_errors: Number of Heartbeat / SQE Test errors for
- *   old half-duplex Ethernet.
- *   Part of aggregate "carrier" errors in `/proc/net/dev`.
- *
- *   For IEEE 802.3 devices possibly equivalent to:
- *
- *    - 30.3.2.1.4 aSQETestErrors
- *
- * @tx_window_errors: Number of frame transmission errors due
- *   to late collisions (for Ethernet - after the first 64B of transmission).
- *   Part of aggregate "carrier" errors in `/proc/net/dev`.
- *
- *   For IEEE 802.3 devices this counter must be equivalent to:
- *
- *    - 30.3.1.1.10 aLateCollisions
- *
- * @rx_compressed: Number of correctly received compressed packets.
- *   This counters is only meaningful for interfaces which support
- *   packet compression (e.g. CSLIP, PPP).
- *
- * @tx_compressed: Number of transmitted compressed packets.
- *   This counters is only meaningful for interfaces which support
- *   packet compression (e.g. CSLIP, PPP).
- *
- * @rx_nohandler: Number of packets received on the interface
- *   but dropped by the networking stack because the device is
- *   not designated to receive packets (e.g. backup link in a bond).
- */
+/* The main device statistics structure */
 struct rtnl_link_stats64 {
-	__u64	rx_packets;
-	__u64	tx_packets;
-	__u64	rx_bytes;
-	__u64	tx_bytes;
-	__u64	rx_errors;
-	__u64	tx_errors;
-	__u64	rx_dropped;
-	__u64	tx_dropped;
-	__u64	multicast;
+	__u64	rx_packets;		/* total packets received	*/
+	__u64	tx_packets;		/* total packets transmitted	*/
+	__u64	rx_bytes;		/* total bytes received 	*/
+	__u64	tx_bytes;		/* total bytes transmitted	*/
+	__u64	rx_errors;		/* bad packets received		*/
+	__u64	tx_errors;		/* packet transmit problems	*/
+	__u64	rx_dropped;		/* no space in linux buffers	*/
+	__u64	tx_dropped;		/* no space available in linux	*/
+	__u64	multicast;		/* multicast packets received	*/
 	__u64	collisions;
 
 	/* detailed rx_errors: */
 	__u64	rx_length_errors;
-	__u64	rx_over_errors;
-	__u64	rx_crc_errors;
-	__u64	rx_frame_errors;
-	__u64	rx_fifo_errors;
-	__u64	rx_missed_errors;
+	__u64	rx_over_errors;		/* receiver ring buff overflow	*/
+	__u64	rx_crc_errors;		/* recved pkt with crc error	*/
+	__u64	rx_frame_errors;	/* recv'd frame alignment error */
+	__u64	rx_fifo_errors;		/* recv'r fifo overrun		*/
+	__u64	rx_missed_errors;	/* receiver missed packet	*/
 
 	/* detailed tx_errors */
 	__u64	tx_aborted_errors;
@@ -242,7 +71,8 @@ struct rtnl_link_stats64 {
 	/* for cslip etc */
 	__u64	rx_compressed;
 	__u64	tx_compressed;
-	__u64	rx_nohandler;
+
+	__u64	rx_nohandler;		/* dropped, no handler found	*/
 };
 
 /* The struct should be in sync with struct ifmap */
@@ -340,32 +170,12 @@ enum {
 	IFLA_PROP_LIST,
 	IFLA_ALT_IFNAME, /* Alternative ifname */
 	IFLA_PERM_ADDRESS,
-	IFLA_PROTO_DOWN_REASON,
-
-	/* device (sysfs) name as parent, used instead
-	 * of IFLA_LINK where there's no parent netdev
-	 */
-	IFLA_PARENT_DEV_NAME,
-	IFLA_PARENT_DEV_BUS_NAME,
-	IFLA_GRO_MAX_SIZE,
-	IFLA_TSO_MAX_SIZE,
-	IFLA_TSO_MAX_SEGS,
-
 	__IFLA_MAX
 };
 
 
 #define IFLA_MAX (__IFLA_MAX - 1)
 
-enum {
-	IFLA_PROTO_DOWN_REASON_UNSPEC,
-	IFLA_PROTO_DOWN_REASON_MASK,	/* u32, mask for reason bits */
-	IFLA_PROTO_DOWN_REASON_VALUE,   /* u32, reason bit value */
-
-	__IFLA_PROTO_DOWN_REASON_CNT,
-	IFLA_PROTO_DOWN_REASON_MAX = __IFLA_PROTO_DOWN_REASON_CNT - 1
-};
-
 /* backwards compatibility for userspace */
 #ifndef __KERNEL__
 #define IFLA_RTA(r)  ((struct rtattr*)(((char*)(r)) + NLMSG_ALIGN(sizeof(struct ifinfomsg))))
@@ -420,7 +230,6 @@ enum {
 	IFLA_INET6_ICMP6STATS,	/* statistics (icmpv6)		*/
 	IFLA_INET6_TOKEN,	/* device token			*/
 	IFLA_INET6_ADDR_GEN_MODE, /* implicit address generator mode */
-	IFLA_INET6_RA_MTU,	/* mtu carried in the RA message */
 	__IFLA_INET6_MAX
 };
 
@@ -483,7 +292,6 @@ enum {
 	IFLA_BR_MCAST_MLD_VERSION,
 	IFLA_BR_VLAN_STATS_PER_PORT,
 	IFLA_BR_MULTI_BOOLOPT,
-	IFLA_BR_MCAST_QUERIER_STATE,
 	__IFLA_BR_MAX,
 };
 
@@ -536,9 +344,6 @@ enum {
 	IFLA_BRPORT_ISOLATED,
 	IFLA_BRPORT_BACKUP_PORT,
 	IFLA_BRPORT_MRP_RING_OPEN,
-	IFLA_BRPORT_MRP_IN_OPEN,
-	IFLA_BRPORT_MCAST_EHT_HOSTS_LIMIT,
-	IFLA_BRPORT_MCAST_EHT_HOSTS_CNT,
 	__IFLA_BRPORT_MAX
 };
 #define IFLA_BRPORT_MAX (__IFLA_BRPORT_MAX - 1)
@@ -603,8 +408,6 @@ enum {
 	IFLA_MACVLAN_MACADDR,
 	IFLA_MACVLAN_MACADDR_DATA,
 	IFLA_MACVLAN_MACADDR_COUNT,
-	IFLA_MACVLAN_BC_QUEUE_LEN,
-	IFLA_MACVLAN_BC_QUEUE_LEN_USED,
 	__IFLA_MACVLAN_MAX,
 };
 
@@ -626,7 +429,6 @@ enum macvlan_macaddr_mode {
 };
 
 #define MACVLAN_FLAG_NOPROMISC	1
-#define MACVLAN_FLAG_NODST	2 /* skip dst macvlan if matching src macvlan */
 
 /* VRF section */
 enum {
@@ -791,18 +593,6 @@ enum ifla_geneve_df {
 	GENEVE_DF_MAX = __GENEVE_DF_END - 1,
 };
 
-/* Bareudp section  */
-enum {
-	IFLA_BAREUDP_UNSPEC,
-	IFLA_BAREUDP_PORT,
-	IFLA_BAREUDP_ETHERTYPE,
-	IFLA_BAREUDP_SRCPORT_MIN,
-	IFLA_BAREUDP_MULTIPROTO_MODE,
-	__IFLA_BAREUDP_MAX
-};
-
-#define IFLA_BAREUDP_MAX (__IFLA_BAREUDP_MAX - 1)
-
 /* PPP section */
 enum {
 	IFLA_PPP_UNSPEC,
@@ -860,9 +650,6 @@ enum {
 	IFLA_BOND_AD_ACTOR_SYSTEM,
 	IFLA_BOND_TLB_DYNAMIC_LB,
 	IFLA_BOND_PEER_NOTIF_DELAY,
-	IFLA_BOND_AD_LACP_ACTIVE,
-	IFLA_BOND_MISSED_MAX,
-	IFLA_BOND_NS_IP6_TARGET,
 	__IFLA_BOND_MAX,
 };
 
@@ -890,7 +677,6 @@ enum {
 	IFLA_BOND_SLAVE_AD_AGGREGATOR_ID,
 	IFLA_BOND_SLAVE_AD_ACTOR_OPER_PORT_STATE,
 	IFLA_BOND_SLAVE_AD_PARTNER_OPER_PORT_STATE,
-	IFLA_BOND_SLAVE_PRIO,
 	__IFLA_BOND_SLAVE_MAX,
 };
 
@@ -1108,14 +894,7 @@ enum {
 #define IFLA_IPOIB_MAX (__IFLA_IPOIB_MAX - 1)
 
 
-/* HSR/PRP section, both uses same interface */
-
-/* Different redundancy protocols for hsr device */
-enum {
-	HSR_PROTOCOL_HSR,
-	HSR_PROTOCOL_PRP,
-	HSR_PROTOCOL_MAX,
-};
+/* HSR section */
 
 enum {
 	IFLA_HSR_UNSPEC,
@@ -1125,9 +904,6 @@ enum {
 	IFLA_HSR_SUPERVISION_ADDR,	/* Supervision frame multicast addr */
 	IFLA_HSR_SEQ_NR,
 	IFLA_HSR_VERSION,		/* HSR version */
-	IFLA_HSR_PROTOCOL,		/* Indicate different protocol than
-					 * HSR. For example PRP.
-					 */
 	__IFLA_HSR_MAX,
 };
 
@@ -1252,8 +1028,6 @@ enum {
 #define RMNET_FLAGS_INGRESS_MAP_COMMANDS          (1U << 1)
 #define RMNET_FLAGS_INGRESS_MAP_CKSUMV4           (1U << 2)
 #define RMNET_FLAGS_EGRESS_MAP_CKSUMV4            (1U << 3)
-#define RMNET_FLAGS_INGRESS_MAP_CKSUMV5           (1U << 4)
-#define RMNET_FLAGS_EGRESS_MAP_CKSUMV5            (1U << 5)
 
 enum {
 	IFLA_RMNET_UNSPEC,
@@ -1269,14 +1043,4 @@ struct ifla_rmnet_flags {
 	__u32	mask;
 };
 
-/* MCTP section */
-
-enum {
-	IFLA_MCTP_UNSPEC,
-	IFLA_MCTP_NET,
-	__IFLA_MCTP_MAX,
-};
-
-#define IFLA_MCTP_MAX (__IFLA_MCTP_MAX - 1)
-
 #endif /* _UAPI_LINUX_IF_LINK_H */

include/uapi/linux/if_xdp.h

@@ -73,12 +73,9 @@ struct xdp_umem_reg {
 };
 
 struct xdp_statistics {
-	__u64 rx_dropped; /* Dropped for other reasons */
+	__u64 rx_dropped; /* Dropped for reasons other than invalid desc */
 	__u64 rx_invalid_descs; /* Dropped due to invalid descriptor */
 	__u64 tx_invalid_descs; /* Dropped due to invalid descriptor */
-	__u64 rx_ring_full; /* Dropped due to rx ring being full */
-	__u64 rx_fill_ring_empty_descs; /* Failed to retrieve item from fill ring */
-	__u64 tx_ring_empty_descs; /* Failed to retrieve item from tx ring */
 };
 
 struct xdp_options {

include/uapi/linux/pkt_cls.h

@@ -1,612 +0,0 @@
-/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
-#ifndef __LINUX_PKT_CLS_H
-#define __LINUX_PKT_CLS_H
-
-#include <linux/types.h>
-#include <linux/pkt_sched.h>
-
-#define TC_COOKIE_MAX_SIZE 16
-
-/* Action attributes */
-enum {
-	TCA_ACT_UNSPEC,
-	TCA_ACT_KIND,
-	TCA_ACT_OPTIONS,
-	TCA_ACT_INDEX,
-	TCA_ACT_STATS,
-	TCA_ACT_PAD,
-	TCA_ACT_COOKIE,
-	__TCA_ACT_MAX
-};
-
-#define TCA_ACT_MAX __TCA_ACT_MAX
-#define TCA_OLD_COMPAT (TCA_ACT_MAX+1)
-#define TCA_ACT_MAX_PRIO 32
-#define TCA_ACT_BIND	1
-#define TCA_ACT_NOBIND	0
-#define TCA_ACT_UNBIND	1
-#define TCA_ACT_NOUNBIND	0
-#define TCA_ACT_REPLACE		1
-#define TCA_ACT_NOREPLACE	0
-
-#define TC_ACT_UNSPEC	(-1)
-#define TC_ACT_OK		0
-#define TC_ACT_RECLASSIFY	1
-#define TC_ACT_SHOT		2
-#define TC_ACT_PIPE		3
-#define TC_ACT_STOLEN		4
-#define TC_ACT_QUEUED		5
-#define TC_ACT_REPEAT		6
-#define TC_ACT_REDIRECT		7
-#define TC_ACT_TRAP		8 /* For hw path, this means "trap to cpu"
-				   * and don't further process the frame
-				   * in hardware. For sw path, this is
-				   * equivalent of TC_ACT_STOLEN - drop
-				   * the skb and act like everything
-				   * is alright.
-				   */
-#define TC_ACT_VALUE_MAX	TC_ACT_TRAP
-
-/* There is a special kind of actions called "extended actions",
- * which need a value parameter. These have a local opcode located in
- * the highest nibble, starting from 1. The rest of the bits
- * are used to carry the value. These two parts together make
- * a combined opcode.
- */
-#define __TC_ACT_EXT_SHIFT 28
-#define __TC_ACT_EXT(local) ((local) << __TC_ACT_EXT_SHIFT)
-#define TC_ACT_EXT_VAL_MASK ((1 << __TC_ACT_EXT_SHIFT) - 1)
-#define TC_ACT_EXT_OPCODE(combined) ((combined) & (~TC_ACT_EXT_VAL_MASK))
-#define TC_ACT_EXT_CMP(combined, opcode) (TC_ACT_EXT_OPCODE(combined) == opcode)
-
-#define TC_ACT_JUMP __TC_ACT_EXT(1)
-#define TC_ACT_GOTO_CHAIN __TC_ACT_EXT(2)
-#define TC_ACT_EXT_OPCODE_MAX	TC_ACT_GOTO_CHAIN
-
-/* Action type identifiers*/
-enum {
-	TCA_ID_UNSPEC=0,
-	TCA_ID_POLICE=1,
-	/* other actions go here */
-	__TCA_ID_MAX=255
-};
-
-#define TCA_ID_MAX __TCA_ID_MAX
-
-struct tc_police {
-	__u32			index;
-	int			action;
-#define TC_POLICE_UNSPEC	TC_ACT_UNSPEC
-#define TC_POLICE_OK		TC_ACT_OK
-#define TC_POLICE_RECLASSIFY	TC_ACT_RECLASSIFY
-#define TC_POLICE_SHOT		TC_ACT_SHOT
-#define TC_POLICE_PIPE		TC_ACT_PIPE
-
-	__u32			limit;
-	__u32			burst;
-	__u32			mtu;
-	struct tc_ratespec	rate;
-	struct tc_ratespec	peakrate;
-	int			refcnt;
-	int			bindcnt;
-	__u32			capab;
-};
-
-struct tcf_t {
-	__u64   install;
-	__u64   lastuse;
-	__u64   expires;
-	__u64   firstuse;
-};
-
-struct tc_cnt {
-	int                   refcnt;
-	int                   bindcnt;
-};
-
-#define tc_gen \
-	__u32                 index; \
-	__u32                 capab; \
-	int                   action; \
-	int                   refcnt; \
-	int                   bindcnt
-
-enum {
-	TCA_POLICE_UNSPEC,
-	TCA_POLICE_TBF,
-	TCA_POLICE_RATE,
-	TCA_POLICE_PEAKRATE,
-	TCA_POLICE_AVRATE,
-	TCA_POLICE_RESULT,
-	TCA_POLICE_TM,
-	TCA_POLICE_PAD,
-	__TCA_POLICE_MAX
-#define TCA_POLICE_RESULT TCA_POLICE_RESULT
-};
-
-#define TCA_POLICE_MAX (__TCA_POLICE_MAX - 1)
-
-/* tca flags definitions */
-#define TCA_CLS_FLAGS_SKIP_HW	(1 << 0) /* don't offload filter to HW */
-#define TCA_CLS_FLAGS_SKIP_SW	(1 << 1) /* don't use filter in SW */
-#define TCA_CLS_FLAGS_IN_HW	(1 << 2) /* filter is offloaded to HW */
-#define TCA_CLS_FLAGS_NOT_IN_HW (1 << 3) /* filter isn't offloaded to HW */
-#define TCA_CLS_FLAGS_VERBOSE	(1 << 4) /* verbose logging */
-
-/* U32 filters */
-
-#define TC_U32_HTID(h) ((h)&0xFFF00000)
-#define TC_U32_USERHTID(h) (TC_U32_HTID(h)>>20)
-#define TC_U32_HASH(h) (((h)>>12)&0xFF)
-#define TC_U32_NODE(h) ((h)&0xFFF)
-#define TC_U32_KEY(h) ((h)&0xFFFFF)
-#define TC_U32_UNSPEC	0
-#define TC_U32_ROOT	(0xFFF00000)
-
-enum {
-	TCA_U32_UNSPEC,
-	TCA_U32_CLASSID,
-	TCA_U32_HASH,
-	TCA_U32_LINK,
-	TCA_U32_DIVISOR,
-	TCA_U32_SEL,
-	TCA_U32_POLICE,
-	TCA_U32_ACT,
-	TCA_U32_INDEV,
-	TCA_U32_PCNT,
-	TCA_U32_MARK,
-	TCA_U32_FLAGS,
-	TCA_U32_PAD,
-	__TCA_U32_MAX
-};
-
-#define TCA_U32_MAX (__TCA_U32_MAX - 1)
-
-struct tc_u32_key {
-	__be32		mask;
-	__be32		val;
-	int		off;
-	int		offmask;
-};
-
-struct tc_u32_sel {
-	unsigned char		flags;
-	unsigned char		offshift;
-	unsigned char		nkeys;
-
-	__be16			offmask;
-	__u16			off;
-	short			offoff;
-
-	short			hoff;
-	__be32			hmask;
-	struct tc_u32_key	keys[];
-};
-
-struct tc_u32_mark {
-	__u32		val;
-	__u32		mask;
-	__u32		success;
-};
-
-struct tc_u32_pcnt {
-	__u64 rcnt;
-	__u64 rhit;
-	__u64 kcnts[];
-};
-
-/* Flags */
-
-#define TC_U32_TERMINAL		1
-#define TC_U32_OFFSET		2
-#define TC_U32_VAROFFSET	4
-#define TC_U32_EAT		8
-
-#define TC_U32_MAXDEPTH 8
-
-
-/* RSVP filter */
-
-enum {
-	TCA_RSVP_UNSPEC,
-	TCA_RSVP_CLASSID,
-	TCA_RSVP_DST,
-	TCA_RSVP_SRC,
-	TCA_RSVP_PINFO,
-	TCA_RSVP_POLICE,
-	TCA_RSVP_ACT,
-	__TCA_RSVP_MAX
-};
-
-#define TCA_RSVP_MAX (__TCA_RSVP_MAX - 1 )
-
-struct tc_rsvp_gpi {
-	__u32	key;
-	__u32	mask;
-	int	offset;
-};
-
-struct tc_rsvp_pinfo {
-	struct tc_rsvp_gpi dpi;
-	struct tc_rsvp_gpi spi;
-	__u8	protocol;
-	__u8	tunnelid;
-	__u8	tunnelhdr;
-	__u8	pad;
-};
-
-/* ROUTE filter */
-
-enum {
-	TCA_ROUTE4_UNSPEC,
-	TCA_ROUTE4_CLASSID,
-	TCA_ROUTE4_TO,
-	TCA_ROUTE4_FROM,
-	TCA_ROUTE4_IIF,
-	TCA_ROUTE4_POLICE,
-	TCA_ROUTE4_ACT,
-	__TCA_ROUTE4_MAX
-};
-
-#define TCA_ROUTE4_MAX (__TCA_ROUTE4_MAX - 1)
-
-
-/* FW filter */
-
-enum {
-	TCA_FW_UNSPEC,
-	TCA_FW_CLASSID,
-	TCA_FW_POLICE,
-	TCA_FW_INDEV,
-	TCA_FW_ACT, /* used by CONFIG_NET_CLS_ACT */
-	TCA_FW_MASK,
-	__TCA_FW_MAX
-};
-
-#define TCA_FW_MAX (__TCA_FW_MAX - 1)
-
-/* TC index filter */
-
-enum {
-	TCA_TCINDEX_UNSPEC,
-	TCA_TCINDEX_HASH,
-	TCA_TCINDEX_MASK,
-	TCA_TCINDEX_SHIFT,
-	TCA_TCINDEX_FALL_THROUGH,
-	TCA_TCINDEX_CLASSID,
-	TCA_TCINDEX_POLICE,
-	TCA_TCINDEX_ACT,
-	__TCA_TCINDEX_MAX
-};
-
-#define TCA_TCINDEX_MAX     (__TCA_TCINDEX_MAX - 1)
-
-/* Flow filter */
-
-enum {
-	FLOW_KEY_SRC,
-	FLOW_KEY_DST,
-	FLOW_KEY_PROTO,
-	FLOW_KEY_PROTO_SRC,
-	FLOW_KEY_PROTO_DST,
-	FLOW_KEY_IIF,
-	FLOW_KEY_PRIORITY,
-	FLOW_KEY_MARK,
-	FLOW_KEY_NFCT,
-	FLOW_KEY_NFCT_SRC,
-	FLOW_KEY_NFCT_DST,
-	FLOW_KEY_NFCT_PROTO_SRC,
-	FLOW_KEY_NFCT_PROTO_DST,
-	FLOW_KEY_RTCLASSID,
-	FLOW_KEY_SKUID,
-	FLOW_KEY_SKGID,
-	FLOW_KEY_VLAN_TAG,
-	FLOW_KEY_RXHASH,
-	__FLOW_KEY_MAX,
-};
-
-#define FLOW_KEY_MAX	(__FLOW_KEY_MAX - 1)
-
-enum {
-	FLOW_MODE_MAP,
-	FLOW_MODE_HASH,
-};
-
-enum {
-	TCA_FLOW_UNSPEC,
-	TCA_FLOW_KEYS,
-	TCA_FLOW_MODE,
-	TCA_FLOW_BASECLASS,
-	TCA_FLOW_RSHIFT,
-	TCA_FLOW_ADDEND,
-	TCA_FLOW_MASK,
-	TCA_FLOW_XOR,
-	TCA_FLOW_DIVISOR,
-	TCA_FLOW_ACT,
-	TCA_FLOW_POLICE,
-	TCA_FLOW_EMATCHES,
-	TCA_FLOW_PERTURB,
-	__TCA_FLOW_MAX
-};
-
-#define TCA_FLOW_MAX	(__TCA_FLOW_MAX - 1)
-
-/* Basic filter */
-
-enum {
-	TCA_BASIC_UNSPEC,
-	TCA_BASIC_CLASSID,
-	TCA_BASIC_EMATCHES,
-	TCA_BASIC_ACT,
-	TCA_BASIC_POLICE,
-	__TCA_BASIC_MAX
-};
-
-#define TCA_BASIC_MAX (__TCA_BASIC_MAX - 1)
-
-
-/* Cgroup classifier */
-
-enum {
-	TCA_CGROUP_UNSPEC,
-	TCA_CGROUP_ACT,
-	TCA_CGROUP_POLICE,
-	TCA_CGROUP_EMATCHES,
-	__TCA_CGROUP_MAX,
-};
-
-#define TCA_CGROUP_MAX (__TCA_CGROUP_MAX - 1)
-
-/* BPF classifier */
-
-#define TCA_BPF_FLAG_ACT_DIRECT		(1 << 0)
-
-enum {
-	TCA_BPF_UNSPEC,
-	TCA_BPF_ACT,
-	TCA_BPF_POLICE,
-	TCA_BPF_CLASSID,
-	TCA_BPF_OPS_LEN,
-	TCA_BPF_OPS,
-	TCA_BPF_FD,
-	TCA_BPF_NAME,
-	TCA_BPF_FLAGS,
-	TCA_BPF_FLAGS_GEN,
-	TCA_BPF_TAG,
-	TCA_BPF_ID,
-	__TCA_BPF_MAX,
-};
-
-#define TCA_BPF_MAX (__TCA_BPF_MAX - 1)
-
-/* Flower classifier */
-
-enum {
-	TCA_FLOWER_UNSPEC,
-	TCA_FLOWER_CLASSID,
-	TCA_FLOWER_INDEV,
-	TCA_FLOWER_ACT,
-	TCA_FLOWER_KEY_ETH_DST,		/* ETH_ALEN */
-	TCA_FLOWER_KEY_ETH_DST_MASK,	/* ETH_ALEN */
-	TCA_FLOWER_KEY_ETH_SRC,		/* ETH_ALEN */
-	TCA_FLOWER_KEY_ETH_SRC_MASK,	/* ETH_ALEN */
-	TCA_FLOWER_KEY_ETH_TYPE,	/* be16 */
-	TCA_FLOWER_KEY_IP_PROTO,	/* u8 */
-	TCA_FLOWER_KEY_IPV4_SRC,	/* be32 */
-	TCA_FLOWER_KEY_IPV4_SRC_MASK,	/* be32 */
-	TCA_FLOWER_KEY_IPV4_DST,	/* be32 */
-	TCA_FLOWER_KEY_IPV4_DST_MASK,	/* be32 */
-	TCA_FLOWER_KEY_IPV6_SRC,	/* struct in6_addr */
-	TCA_FLOWER_KEY_IPV6_SRC_MASK,	/* struct in6_addr */
-	TCA_FLOWER_KEY_IPV6_DST,	/* struct in6_addr */
-	TCA_FLOWER_KEY_IPV6_DST_MASK,	/* struct in6_addr */
-	TCA_FLOWER_KEY_TCP_SRC,		/* be16 */
-	TCA_FLOWER_KEY_TCP_DST,		/* be16 */
-	TCA_FLOWER_KEY_UDP_SRC,		/* be16 */
-	TCA_FLOWER_KEY_UDP_DST,		/* be16 */
-
-	TCA_FLOWER_FLAGS,
-	TCA_FLOWER_KEY_VLAN_ID,		/* be16 */
-	TCA_FLOWER_KEY_VLAN_PRIO,	/* u8   */
-	TCA_FLOWER_KEY_VLAN_ETH_TYPE,	/* be16 */
-
-	TCA_FLOWER_KEY_ENC_KEY_ID,	/* be32 */
-	TCA_FLOWER_KEY_ENC_IPV4_SRC,	/* be32 */
-	TCA_FLOWER_KEY_ENC_IPV4_SRC_MASK,/* be32 */
-	TCA_FLOWER_KEY_ENC_IPV4_DST,	/* be32 */
-	TCA_FLOWER_KEY_ENC_IPV4_DST_MASK,/* be32 */
-	TCA_FLOWER_KEY_ENC_IPV6_SRC,	/* struct in6_addr */
-	TCA_FLOWER_KEY_ENC_IPV6_SRC_MASK,/* struct in6_addr */
-	TCA_FLOWER_KEY_ENC_IPV6_DST,	/* struct in6_addr */
-	TCA_FLOWER_KEY_ENC_IPV6_DST_MASK,/* struct in6_addr */
-
-	TCA_FLOWER_KEY_TCP_SRC_MASK,	/* be16 */
-	TCA_FLOWER_KEY_TCP_DST_MASK,	/* be16 */
-	TCA_FLOWER_KEY_UDP_SRC_MASK,	/* be16 */
-	TCA_FLOWER_KEY_UDP_DST_MASK,	/* be16 */
-	TCA_FLOWER_KEY_SCTP_SRC_MASK,	/* be16 */
-	TCA_FLOWER_KEY_SCTP_DST_MASK,	/* be16 */
-
-	TCA_FLOWER_KEY_SCTP_SRC,	/* be16 */
-	TCA_FLOWER_KEY_SCTP_DST,	/* be16 */
-
-	TCA_FLOWER_KEY_ENC_UDP_SRC_PORT,	/* be16 */
-	TCA_FLOWER_KEY_ENC_UDP_SRC_PORT_MASK,	/* be16 */
-	TCA_FLOWER_KEY_ENC_UDP_DST_PORT,	/* be16 */
-	TCA_FLOWER_KEY_ENC_UDP_DST_PORT_MASK,	/* be16 */
-
-	TCA_FLOWER_KEY_FLAGS,		/* be32 */
-	TCA_FLOWER_KEY_FLAGS_MASK,	/* be32 */
-
-	TCA_FLOWER_KEY_ICMPV4_CODE,	/* u8 */
-	TCA_FLOWER_KEY_ICMPV4_CODE_MASK,/* u8 */
-	TCA_FLOWER_KEY_ICMPV4_TYPE,	/* u8 */
-	TCA_FLOWER_KEY_ICMPV4_TYPE_MASK,/* u8 */
-	TCA_FLOWER_KEY_ICMPV6_CODE,	/* u8 */
-	TCA_FLOWER_KEY_ICMPV6_CODE_MASK,/* u8 */
-	TCA_FLOWER_KEY_ICMPV6_TYPE,	/* u8 */
-	TCA_FLOWER_KEY_ICMPV6_TYPE_MASK,/* u8 */
-
-	TCA_FLOWER_KEY_ARP_SIP,		/* be32 */
-	TCA_FLOWER_KEY_ARP_SIP_MASK,	/* be32 */
-	TCA_FLOWER_KEY_ARP_TIP,		/* be32 */
-	TCA_FLOWER_KEY_ARP_TIP_MASK,	/* be32 */
-	TCA_FLOWER_KEY_ARP_OP,		/* u8 */
-	TCA_FLOWER_KEY_ARP_OP_MASK,	/* u8 */
-	TCA_FLOWER_KEY_ARP_SHA,		/* ETH_ALEN */
-	TCA_FLOWER_KEY_ARP_SHA_MASK,	/* ETH_ALEN */
-	TCA_FLOWER_KEY_ARP_THA,		/* ETH_ALEN */
-	TCA_FLOWER_KEY_ARP_THA_MASK,	/* ETH_ALEN */
-
-	TCA_FLOWER_KEY_MPLS_TTL,	/* u8 - 8 bits */
-	TCA_FLOWER_KEY_MPLS_BOS,	/* u8 - 1 bit */
-	TCA_FLOWER_KEY_MPLS_TC,		/* u8 - 3 bits */
-	TCA_FLOWER_KEY_MPLS_LABEL,	/* be32 - 20 bits */
-
-	TCA_FLOWER_KEY_TCP_FLAGS,	/* be16 */
-	TCA_FLOWER_KEY_TCP_FLAGS_MASK,	/* be16 */
-
-	TCA_FLOWER_KEY_IP_TOS,		/* u8 */
-	TCA_FLOWER_KEY_IP_TOS_MASK,	/* u8 */
-	TCA_FLOWER_KEY_IP_TTL,		/* u8 */
-	TCA_FLOWER_KEY_IP_TTL_MASK,	/* u8 */
-
-	TCA_FLOWER_KEY_CVLAN_ID,	/* be16 */
-	TCA_FLOWER_KEY_CVLAN_PRIO,	/* u8   */
-	TCA_FLOWER_KEY_CVLAN_ETH_TYPE,	/* be16 */
-
-	TCA_FLOWER_KEY_ENC_IP_TOS,	/* u8 */
-	TCA_FLOWER_KEY_ENC_IP_TOS_MASK,	/* u8 */
-	TCA_FLOWER_KEY_ENC_IP_TTL,	/* u8 */
-	TCA_FLOWER_KEY_ENC_IP_TTL_MASK,	/* u8 */
-
-	TCA_FLOWER_KEY_ENC_OPTS,
-	TCA_FLOWER_KEY_ENC_OPTS_MASK,
-
-	TCA_FLOWER_IN_HW_COUNT,
-
-	__TCA_FLOWER_MAX,
-};
-
-#define TCA_FLOWER_MAX (__TCA_FLOWER_MAX - 1)
-
-enum {
-	TCA_FLOWER_KEY_ENC_OPTS_UNSPEC,
-	TCA_FLOWER_KEY_ENC_OPTS_GENEVE, /* Nested
-					 * TCA_FLOWER_KEY_ENC_OPT_GENEVE_
-					 * attributes
-					 */
-	__TCA_FLOWER_KEY_ENC_OPTS_MAX,
-};
-
-#define TCA_FLOWER_KEY_ENC_OPTS_MAX (__TCA_FLOWER_KEY_ENC_OPTS_MAX - 1)
-
-enum {
-	TCA_FLOWER_KEY_ENC_OPT_GENEVE_UNSPEC,
-	TCA_FLOWER_KEY_ENC_OPT_GENEVE_CLASS,            /* u16 */
-	TCA_FLOWER_KEY_ENC_OPT_GENEVE_TYPE,             /* u8 */
-	TCA_FLOWER_KEY_ENC_OPT_GENEVE_DATA,             /* 4 to 128 bytes */
-
-	__TCA_FLOWER_KEY_ENC_OPT_GENEVE_MAX,
-};
-
-#define TCA_FLOWER_KEY_ENC_OPT_GENEVE_MAX \
-		(__TCA_FLOWER_KEY_ENC_OPT_GENEVE_MAX - 1)
-
-enum {
-	TCA_FLOWER_KEY_FLAGS_IS_FRAGMENT = (1 << 0),
-	TCA_FLOWER_KEY_FLAGS_FRAG_IS_FIRST = (1 << 1),
-};
-
-/* Match-all classifier */
-
-enum {
-	TCA_MATCHALL_UNSPEC,
-	TCA_MATCHALL_CLASSID,
-	TCA_MATCHALL_ACT,
-	TCA_MATCHALL_FLAGS,
-	__TCA_MATCHALL_MAX,
-};
-
-#define TCA_MATCHALL_MAX (__TCA_MATCHALL_MAX - 1)
-
-/* Extended Matches */
-
-struct tcf_ematch_tree_hdr {
-	__u16		nmatches;
-	__u16		progid;
-};
-
-enum {
-	TCA_EMATCH_TREE_UNSPEC,
-	TCA_EMATCH_TREE_HDR,
-	TCA_EMATCH_TREE_LIST,
-	__TCA_EMATCH_TREE_MAX
-};
-#define TCA_EMATCH_TREE_MAX (__TCA_EMATCH_TREE_MAX - 1)
-
-struct tcf_ematch_hdr {
-	__u16		matchid;
-	__u16		kind;
-	__u16		flags;
-	__u16		pad; /* currently unused */
-};
-
-/*  0                   1
- *  0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 
- * +-----------------------+-+-+---+
- * |         Unused        |S|I| R |
- * +-----------------------+-+-+---+
- *
- * R(2) ::= relation to next ematch
- *          where: 0 0 END (last ematch)
- *                 0 1 AND
- *                 1 0 OR
- *                 1 1 Unused (invalid)
- * I(1) ::= invert result
- * S(1) ::= simple payload
- */
-#define TCF_EM_REL_END	0
-#define TCF_EM_REL_AND	(1<<0)
-#define TCF_EM_REL_OR	(1<<1)
-#define TCF_EM_INVERT	(1<<2)
-#define TCF_EM_SIMPLE	(1<<3)
-
-#define TCF_EM_REL_MASK	3
-#define TCF_EM_REL_VALID(v) (((v) & TCF_EM_REL_MASK) != TCF_EM_REL_MASK)
-
-enum {
-	TCF_LAYER_LINK,
-	TCF_LAYER_NETWORK,
-	TCF_LAYER_TRANSPORT,
-	__TCF_LAYER_MAX
-};
-#define TCF_LAYER_MAX (__TCF_LAYER_MAX - 1)
-
-/* Ematch type assignments
- *   1..32767		Reserved for ematches inside kernel tree
- *   32768..65535	Free to use, not reliable
- */
-#define	TCF_EM_CONTAINER	0
-#define	TCF_EM_CMP		1
-#define	TCF_EM_NBYTE		2
-#define	TCF_EM_U32		3
-#define	TCF_EM_META		4
-#define	TCF_EM_TEXT		5
-#define	TCF_EM_VLAN		6
-#define	TCF_EM_CANID		7
-#define	TCF_EM_IPSET		8
-#define	TCF_EM_IPT		9
-#define	TCF_EM_MAX		9
-
-enum {
-	TCF_EM_PROG_TC
-};
-
-enum {
-	TCF_EM_OPND_EQ,
-	TCF_EM_OPND_GT,
-	TCF_EM_OPND_LT
-};
-
-#endif

scripts/build-fuzzers.sh

@@ -1,81 +0,0 @@
-#!/bin/bash
-set -eux
-
-SANITIZER=${SANITIZER:-address}
-flags="-O1 -fno-omit-frame-pointer -g -DFUZZING_BUILD_MODE_UNSAFE_FOR_PRODUCTION -fsanitize=$SANITIZER -fsanitize=fuzzer-no-link"
-
-export CC=${CC:-clang}
-export CFLAGS=${CFLAGS:-$flags}
-
-export CXX=${CXX:-clang++}
-export CXXFLAGS=${CXXFLAGS:-$flags}
-
-cd "$(dirname -- "$0")/.."
-
-export OUT=${OUT:-"$(pwd)/out"}
-mkdir -p "$OUT"
-
-export LIB_FUZZING_ENGINE=${LIB_FUZZING_ENGINE:--fsanitize=fuzzer}
-
-# libelf is compiled with _FORTIFY_SOURCE by default and it
-# isn't compatible with MSan. It was borrowed
-# from https://github.com/google/oss-fuzz/pull/7422
-if [[ "$SANITIZER" == memory ]]; then
-    CFLAGS+=" -U_FORTIFY_SOURCE"
-    CXXFLAGS+=" -U_FORTIFY_SOURCE"
-fi
-
-# The alignment check is turned off by default on OSS-Fuzz/CFLite so it should be
-# turned on explicitly there. It was borrowed from
-# https://github.com/google/oss-fuzz/pull/7092
-if [[ "$SANITIZER" == undefined ]]; then
-    additional_ubsan_checks=alignment
-    UBSAN_FLAGS="-fsanitize=$additional_ubsan_checks -fno-sanitize-recover=$additional_ubsan_checks"
-    CFLAGS+=" $UBSAN_FLAGS"
-    CXXFLAGS+=" $UBSAN_FLAGS"
-fi
-
-# Ideally libbelf should be built using release tarballs available
-# at https://sourceware.org/elfutils/ftp/. Unfortunately sometimes they
-# fail to compile (for example, elfutils-0.185 fails to compile with LDFLAGS enabled
-# due to https://bugs.gentoo.org/794601) so let's just point the script to
-# commits referring to versions of libelf that actually can be built
-rm -rf elfutils
-git clone git://sourceware.org/git/elfutils.git
-(
-cd elfutils
-git checkout 83251d4091241acddbdcf16f814e3bc6ef3df49a
-git log --oneline -1
-
-# ASan isn't compatible with -Wl,--no-undefined: https://github.com/google/sanitizers/issues/380
-find -name Makefile.am | xargs sed -i 's/,--no-undefined//'
-
-# ASan isn't compatible with -Wl,-z,defs either:
-# https://clang.llvm.org/docs/AddressSanitizer.html#usage
-sed -i 's/^\(ZDEFS_LDFLAGS=\).*/\1/' configure.ac
-
-if [[ "$SANITIZER" == undefined ]]; then
-    # That's basicaly what --enable-sanitize-undefined does to turn off unaligned access
-    # elfutils heavily relies on on i386/x86_64 but without changing compiler flags along the way
-    sed -i 's/\(check_undefined_val\)=[0-9]/\1=1/' configure.ac
-fi
-
-autoreconf -i -f
-if ! ./configure --enable-maintainer-mode --disable-debuginfod --disable-libdebuginfod \
-	    CC="$CC" CFLAGS="-Wno-error $CFLAGS" CXX="$CXX" CXXFLAGS="-Wno-error $CXXFLAGS" LDFLAGS="$CFLAGS"; then
-    cat config.log
-    exit 1
-fi
-
-make -C config -j$(nproc) V=1
-make -C lib -j$(nproc) V=1
-make -C libelf -j$(nproc) V=1
-)
-
-make -C src BUILD_STATIC_ONLY=y V=1 clean
-make -C src -j$(nproc) CFLAGS="-I$(pwd)/elfutils/libelf $CFLAGS" BUILD_STATIC_ONLY=y V=1
-
-$CC $CFLAGS -Isrc -Iinclude -Iinclude/uapi -D_LARGEFILE64_SOURCE -D_FILE_OFFSET_BITS=64  -c fuzz/bpf-object-fuzzer.c -o bpf-object-fuzzer.o
-$CXX $CXXFLAGS $LIB_FUZZING_ENGINE bpf-object-fuzzer.o src/libbpf.a "$(pwd)/elfutils/libelf/libelf.a" -l:libz.a -o "$OUT/bpf-object-fuzzer"
-
-cp fuzz/bpf-object-fuzzer_seed_corpus.zip "$OUT"

scripts/check-reallocarray.sh

@@ -0,0 +1,18 @@
+#!/bin/sh
+
+tfile=$(mktemp /tmp/test_reallocarray_XXXXXXXX.c)
+ofile=${tfile%.c}.o
+
+cat > $tfile <<EOL
+#define _GNU_SOURCE
+#include <stdlib.h>
+
+int main(void)
+{
+	return !!reallocarray(NULL, 1, 1);
+}
+EOL
+
+gcc $tfile -o $ofile >/dev/null 2>&1
+if [ $? -ne 0 ]; then echo "FAIL"; fi
+/bin/rm -f $tfile $ofile

scripts/sync-kernel.sh

@@ -6,6 +6,7 @@ usage () {
 	echo "Set BPF_NEXT_BASELINE to override bpf-next tree commit, otherwise read from <libbpf-repo>/CHECKPOINT-COMMIT."
 	echo "Set BPF_BASELINE to override bpf tree commit, otherwise read from <libbpf-repo>/BPF-CHECKPOINT-COMMIT."
 	echo "Set MANUAL_MODE to 1 to manually control every cherry-picked commits."
+	echo "Set IGNORE_CONSISTENCY to 1 to ignore failed contents consistency check."
 	exit 1
 }
 
@@ -17,7 +18,7 @@ BPF_BRANCH=${3-""}
 BASELINE_COMMIT=${BPF_NEXT_BASELINE:-$(cat ${LIBBPF_REPO}/CHECKPOINT-COMMIT)}
 BPF_BASELINE_COMMIT=${BPF_BASELINE:-$(cat ${LIBBPF_REPO}/BPF-CHECKPOINT-COMMIT)}
 
-if [ -z "${LIBBPF_REPO}" ] || [ -z "${LINUX_REPO}" ]; then
+if [ -z "${LIBBPF_REPO}" ] || [ -z "${LINUX_REPO}" ] || [ -z "${BPF_BRANCH}" ]; then
 	echo "Error: libbpf or linux repos are not specified"
 	usage
 fi
@@ -45,16 +46,12 @@ PATH_MAP=(									\
 	[tools/include/uapi/linux/if_link.h]=include/uapi/linux/if_link.h	\
 	[tools/include/uapi/linux/if_xdp.h]=include/uapi/linux/if_xdp.h		\
 	[tools/include/uapi/linux/netlink.h]=include/uapi/linux/netlink.h	\
-	[tools/include/uapi/linux/pkt_cls.h]=include/uapi/linux/pkt_cls.h	\
-	[tools/include/uapi/linux/pkt_sched.h]=include/uapi/linux/pkt_sched.h	\
-	[include/uapi/linux/perf_event.h]=include/uapi/linux/perf_event.h	\
-	[Documentation/bpf/libbpf]=docs						\
+	[tools/include/tools/libc_compat.h]=include/tools/libc_compat.h		\
 )
 
-LIBBPF_PATHS="${!PATH_MAP[@]} :^tools/lib/bpf/Makefile :^tools/lib/bpf/Build :^tools/lib/bpf/.gitignore :^tools/include/tools/libc_compat.h"
+LIBBPF_PATHS="${!PATH_MAP[@]} :^tools/lib/bpf/Makefile :^tools/lib/bpf/Build :^tools/lib/bpf/.gitignore"
 LIBBPF_VIEW_PATHS="${PATH_MAP[@]}"
-LIBBPF_VIEW_EXCLUDE_REGEX='^src/(Makefile|Build|test_libbpf\.c|bpf_helper_defs\.h|\.gitignore)$|^docs/(\.gitignore|api\.rst|conf\.py)$|^docs/sphinx/.*'
-LINUX_VIEW_EXCLUDE_REGEX='^include/tools/libc_compat.h$'
+LIBBPF_VIEW_EXCLUDE_REGEX='^src/(Makefile|Build|test_libbpf\.c|bpf_helper_defs\.h|\.gitignore)$'
 
 LIBBPF_TREE_FILTER="mkdir -p __libbpf/include/uapi/linux __libbpf/include/tools && "$'\\\n'
 for p in "${!PATH_MAP[@]}"; do
@@ -75,7 +72,7 @@ commit_desc()
 }
 
 # Create commit single-line signature, which consists of:
-# - full commit subject
+# - full commit hash
 # - author date in ISO8601 format
 # - full commit body with newlines replaced with vertical bars (|)
 # - shortstat appended at the end
@@ -140,7 +137,6 @@ cherry_pick_commits()
 			echo "Warning! Cherry-picking '${desc} failed, checking if it's non-libbpf files causing problems..."
 			libbpf_conflict_cnt=$(git diff --name-only --diff-filter=U -- ${LIBBPF_PATHS[@]} | wc -l)
 			conflict_cnt=$(git diff --name-only | wc -l)
-			prompt_resolution=1
 
 			if ((${libbpf_conflict_cnt} == 0)); then
 				echo "Looks like only non-libbpf files have conflicts, ignoring..."
@@ -156,37 +152,15 @@ cherry_pick_commits()
 					echo "Error! That still failed! Please resolve manually."
 				else
 					echo "Success! All cherry-pick conflicts were resolved for '${desc}'!"
-					prompt_resolution=0
+					continue
 				fi
 			fi
 
-			if ((${prompt_resolution} == 1)); then
-				read -p "Error! Cherry-picking '${desc}' failed, please fix manually and press <return> to proceed..."
-			fi
+			read -p "Error! Cherry-picking '${desc}' failed, please fix manually and press <return> to proceed..."
 		fi
-		# Append signature of just cherry-picked commit to avoid
-		# potentially cherry-picking the same commit twice later when
-		# processing bpf tree commits. At this point we don't know yet
-		# the final commit sha in libbpf repo, so we record Linux SHA
-		# instead as LINUX_<sha>.
-		echo LINUX_$(git log --pretty='%h' -n1) "${signature}" >> ${TMP_DIR}/libbpf_commits.txt
 	done
 }
 
-cleanup()
-{
-	echo "Cleaning up..."
-	rm -r ${TMP_DIR}
-	cd_to ${LINUX_REPO}
-	git checkout ${TIP_SYM_REF}
-	git branch -D ${BASELINE_TAG} ${TIP_TAG} ${BPF_BASELINE_TAG} ${BPF_TIP_TAG} \
-		      ${SQUASH_BASE_TAG} ${SQUASH_TIP_TAG} ${VIEW_TAG} || true
-
-	cd_to .
-	echo "DONE."
-}
-
-
 cd_to ${LIBBPF_REPO}
 GITHUB_ABS_DIR=$(pwd)
 echo "Dumping existing libbpf commit signatures..."
@@ -252,7 +226,6 @@ FILTER_BRANCH_SQUELCH_WARNING=1 git filter-branch --prune-empty -f --subdirector
 COMMIT_CNT=$(git rev-list --count ${SQUASH_BASE_TAG}..${SQUASH_TIP_TAG})
 if ((${COMMIT_CNT} <= 0)); then
     echo "No new changes to apply, we are done!"
-    cleanup
     exit 2
 fi
 
@@ -264,21 +237,18 @@ cd_to ${LIBBPF_REPO}
 git checkout -b ${LIBBPF_SYNC_TAG}
 
 for patch in $(ls -1 ${TMP_DIR}/patches | tail -n +2); do
-	if ! git am -3 --committer-date-is-author-date "${TMP_DIR}/patches/${patch}"; then
-		if ! patch -p1 --merge < "${TMP_DIR}/patches/${patch}"; then
-			read -p "Applying ${TMP_DIR}/patches/${patch} failed, please resolve manually and press <return> to proceed..."
-		fi
-		git am --continue
+	if ! git am --committer-date-is-author-date "${TMP_DIR}/patches/${patch}"; then
+		read -p "Applying ${TMP_DIR}/patches/${patch} failed, please resolve manually and press <return> to proceed..."
 	fi
 done
 
 # Generate bpf_helper_defs.h and commit, if anything changed
-# restore Linux tip to use bpf_doc.py
+# restore Linux tip to use bpf_helpers_doc.py
 cd_to ${LINUX_REPO}
 git checkout ${TIP_TAG}
 # re-generate bpf_helper_defs.h
 cd_to ${LIBBPF_REPO}
-"${LINUX_ABS_DIR}/scripts/bpf_doc.py" --header					      \
+"${LINUX_ABS_DIR}/scripts/bpf_helpers_doc.py" --header			    \
 	--file include/uapi/linux/bpf.h > src/bpf_helper_defs.h
 # if anything changed, commit it
 helpers_changes=$(git status --porcelain src/bpf_helper_defs.h | wc -l)
@@ -316,7 +286,7 @@ cd_to ${LINUX_REPO}
 git checkout -b ${VIEW_TAG} ${TIP_COMMIT}
 FILTER_BRANCH_SQUELCH_WARNING=1 git filter-branch -f --tree-filter "${LIBBPF_TREE_FILTER}" ${VIEW_TAG}^..${VIEW_TAG}
 FILTER_BRANCH_SQUELCH_WARNING=1 git filter-branch -f --subdirectory-filter __libbpf ${VIEW_TAG}^..${VIEW_TAG}
-git ls-files -- ${LIBBPF_VIEW_PATHS[@]} | grep -v -E "${LINUX_VIEW_EXCLUDE_REGEX}" > ${TMP_DIR}/linux-view.ls
+git ls-files -- ${LIBBPF_VIEW_PATHS[@]} > ${TMP_DIR}/linux-view.ls
 
 cd_to ${LIBBPF_REPO}
 git ls-files -- ${LIBBPF_VIEW_PATHS[@]} | grep -v -E "${LIBBPF_VIEW_EXCLUDE_REGEX}" > ${TMP_DIR}/github-view.ls
@@ -334,17 +304,19 @@ done
 if ((${CONSISTENT} == 1)); then
 	echo "Great! Content is identical!"
 else
-	ignore_inconsistency=n
-	echo "Unfortunately, there are some inconsistencies, please double check."
-	read -p "Does everything look good? [y/N]: " ignore_inconsistency
-	case "${ignore_inconsistency}" in
-		"y" | "Y")
-			echo "Ok, proceeding..."
-			;;
-		*)
-			echo "Oops, exiting with error..."
-			exit 4
-	esac
+	echo "Unfortunately, there are consistency problems!"
+	if ((${IGNORE_CONSISTENCY-0} != 1)); then
+		exit 4
+	fi
 fi
 
-cleanup
+echo "Cleaning up..."
+rm -r ${TMP_DIR}
+cd_to ${LINUX_REPO}
+git checkout ${TIP_SYM_REF}
+git branch -D ${BASELINE_TAG} ${TIP_TAG} ${BPF_BASELINE_TAG} ${BPF_TIP_TAG} \
+	      ${SQUASH_BASE_TAG} ${SQUASH_TIP_TAG} ${VIEW_TAG}
+
+cd_to .
+echo "DONE."
+

src/Makefile

@@ -1,58 +1,39 @@
 # SPDX-License-Identifier: (LGPL-2.1 OR BSD-2-Clause)
 
-ifeq ($(V),1)
-	Q =
-	msg =
-else
-	Q = @
-	msg = @printf '  %-8s %s%s\n' "$(1)" "$(2)" "$(if $(3), $(3))";
-endif
-
-LIBBPF_MAJOR_VERSION := 1
-LIBBPF_MINOR_VERSION := 1
-LIBBPF_PATCH_VERSION := 0
-LIBBPF_VERSION := $(LIBBPF_MAJOR_VERSION).$(LIBBPF_MINOR_VERSION).$(LIBBPF_PATCH_VERSION)
-LIBBPF_MAJMIN_VERSION := $(LIBBPF_MAJOR_VERSION).$(LIBBPF_MINOR_VERSION).0
-LIBBPF_MAP_VERSION := $(shell grep -oE '^LIBBPF_([0-9.]+)' libbpf.map | sort -rV | head -n1 | cut -d'_' -f2)
-ifneq ($(LIBBPF_MAJMIN_VERSION), $(LIBBPF_MAP_VERSION))
-$(error Libbpf release ($(LIBBPF_VERSION)) and map ($(LIBBPF_MAP_VERSION)) versions are out of sync!)
-endif
-
-define allow-override
-  $(if $(or $(findstring environment,$(origin $(1))),\
-            $(findstring command line,$(origin $(1)))),,\
-    $(eval $(1) = $(2)))
-endef
-
-$(call allow-override,CC,$(CROSS_COMPILE)cc)
-$(call allow-override,LD,$(CROSS_COMPILE)ld)
+LIBBPF_VERSION := $(shell \
+	grep -oE '^LIBBPF_([0-9.]+)' libbpf.map | \
+	sort -rV | head -n1 | cut -d'_' -f2)
+LIBBPF_MAJOR_VERSION := $(firstword $(subst ., ,$(LIBBPF_VERSION)))
 
 TOPDIR = ..
 
 INCLUDES := -I. -I$(TOPDIR)/include -I$(TOPDIR)/include/uapi
 ALL_CFLAGS := $(INCLUDES)
 
+FEATURE_REALLOCARRAY := $(shell $(TOPDIR)/scripts/check-reallocarray.sh)
+ifneq ($(FEATURE_REALLOCARRAY),)
+	ALL_CFLAGS += -DCOMPAT_NEED_REALLOCARRAY
+endif
+
 SHARED_CFLAGS += -fPIC -fvisibility=hidden -DSHARED
 
-CFLAGS ?= -g -O2 -Werror -Wall -std=gnu89
-ALL_CFLAGS += $(CFLAGS) -D_LARGEFILE64_SOURCE -D_FILE_OFFSET_BITS=64 $(EXTRA_CFLAGS)
-ALL_LDFLAGS += $(LDFLAGS) $(EXTRA_LDFLAGS)
-
+CFLAGS ?= -g -O2 -Werror -Wall
+ALL_CFLAGS += $(CFLAGS) -D_LARGEFILE64_SOURCE -D_FILE_OFFSET_BITS=64
+ALL_LDFLAGS += $(LDFLAGS)
 ifdef NO_PKG_CONFIG
 	ALL_LDFLAGS += -lelf -lz
 else
 	PKG_CONFIG ?= pkg-config
-	ALL_CFLAGS += $(shell $(PKG_CONFIG) --cflags libelf zlib)
-	ALL_LDFLAGS += $(shell $(PKG_CONFIG) --libs libelf zlib)
+	ALL_CFLAGS += $(shell $(PKG_CONFIG) --cflags libelf)
+	ALL_LDFLAGS += $(shell $(PKG_CONFIG) --libs libelf)
 endif
 
 OBJDIR ?= .
 SHARED_OBJDIR := $(OBJDIR)/sharedobjs
 STATIC_OBJDIR := $(OBJDIR)/staticobjs
 OBJS := bpf.o btf.o libbpf.o libbpf_errno.o netlink.o \
-	nlattr.o str_error.o libbpf_probes.o bpf_prog_linfo.o \
-	btf_dump.o hashmap.o ringbuf.o strset.o linker.o gen_loader.o \
-	relo_core.o usdt.o
+	nlattr.o str_error.o libbpf_probes.o bpf_prog_linfo.o xsk.o \
+	btf_dump.o hashmap.o ringbuf.o
 SHARED_OBJS := $(addprefix $(SHARED_OBJDIR)/,$(OBJS))
 STATIC_OBJS := $(addprefix $(STATIC_OBJDIR)/,$(OBJS))
 
@@ -64,10 +45,9 @@ ifndef BUILD_STATIC_ONLY
 	VERSION_SCRIPT := libbpf.map
 endif
 
-HEADERS := bpf.h libbpf.h btf.h libbpf_common.h libbpf_legacy.h \
+HEADERS := bpf.h libbpf.h btf.h xsk.h libbpf_util.h \
 	   bpf_helpers.h bpf_helper_defs.h bpf_tracing.h \
-	   bpf_endian.h bpf_core_read.h skel_internal.h libbpf_version.h \
-	   usdt.bpf.h
+	   bpf_endian.h bpf_core_read.h libbpf_common.h
 UAPI_HEADERS := $(addprefix $(TOPDIR)/include/uapi/linux/,\
 			    bpf.h bpf_common.h btf.h)
 
@@ -77,19 +57,12 @@ INSTALL = install
 
 DESTDIR ?=
 
-ifeq ($(filter-out %64 %64be %64eb %64le %64el s390x, $(shell uname -m)),)
+ifeq ($(shell uname -m),x86_64)
 	LIBSUBDIR := lib64
 else
 	LIBSUBDIR := lib
 endif
 
-# By default let the pc file itself use ${prefix} in includedir/libdir so that
-# the prefix can be overridden at runtime (eg: --define-prefix)
-ifndef LIBDIR
-	LIBDIR_PC := $$\{prefix\}/$(LIBSUBDIR)
-else
-	LIBDIR_PC := $(LIBDIR)
-endif
 PREFIX ?= /usr
 LIBDIR ?= $(PREFIX)/$(LIBSUBDIR)
 INCLUDEDIR ?= $(PREFIX)/include
@@ -100,54 +73,50 @@ TAGS_PROG := $(if $(shell which etags 2>/dev/null),etags,ctags)
 all: $(STATIC_LIBS) $(SHARED_LIBS) $(PC_FILE)
 
 $(OBJDIR)/libbpf.a: $(STATIC_OBJS)
-	$(call msg,AR,$@)
-	$(Q)$(AR) rcs $@ $^
+	$(AR) rcs $@ $^
 
 $(OBJDIR)/libbpf.so: $(OBJDIR)/libbpf.so.$(LIBBPF_MAJOR_VERSION)
-	$(Q)ln -sf $(^F) $@
+	ln -sf $(^F) $@
 
 $(OBJDIR)/libbpf.so.$(LIBBPF_MAJOR_VERSION): $(OBJDIR)/libbpf.so.$(LIBBPF_VERSION)
-	$(Q)ln -sf $(^F) $@
+	ln -sf $(^F) $@
 
 $(OBJDIR)/libbpf.so.$(LIBBPF_VERSION): $(SHARED_OBJS)
-	$(call msg,CC,$@)
-	$(Q)$(CC) -shared -Wl,--version-script=$(VERSION_SCRIPT) \
-		  -Wl,-soname,libbpf.so.$(LIBBPF_MAJOR_VERSION) \
-		  $^ $(ALL_LDFLAGS) -o $@
+	$(CC) -shared -Wl,--version-script=$(VERSION_SCRIPT) \
+		      -Wl,-soname,libbpf.so.$(LIBBPF_MAJOR_VERSION) \
+		      $^ $(ALL_LDFLAGS) -o $@
 
-$(OBJDIR)/libbpf.pc: force
-	$(Q)sed -e "s|@PREFIX@|$(PREFIX)|" \
-		-e "s|@LIBDIR@|$(LIBDIR_PC)|" \
+$(OBJDIR)/libbpf.pc:
+	sed -e "s|@PREFIX@|$(PREFIX)|" \
+		-e "s|@LIBDIR@|$(LIBDIR)|" \
 		-e "s|@VERSION@|$(LIBBPF_VERSION)|" \
 		< libbpf.pc.template > $@
 
-$(STATIC_OBJDIR) $(SHARED_OBJDIR):
-	$(call msg,MKDIR,$@)
-	$(Q)mkdir -p $@
+$(STATIC_OBJDIR):
+	mkdir -p $(STATIC_OBJDIR)
+
+$(SHARED_OBJDIR):
+	mkdir -p $(SHARED_OBJDIR)
 
 $(STATIC_OBJDIR)/%.o: %.c | $(STATIC_OBJDIR)
-	$(call msg,CC,$@)
-	$(Q)$(CC) $(ALL_CFLAGS) $(CPPFLAGS) -c $< -o $@
+	$(CC) $(ALL_CFLAGS) $(CPPFLAGS) -c $< -o $@
 
 $(SHARED_OBJDIR)/%.o: %.c | $(SHARED_OBJDIR)
-	$(call msg,CC,$@)
-	$(Q)$(CC) $(ALL_CFLAGS) $(SHARED_CFLAGS) $(CPPFLAGS) -c $< -o $@
+	$(CC) $(ALL_CFLAGS) $(SHARED_CFLAGS) $(CPPFLAGS) -c $< -o $@
 
 define do_install
-	$(call msg,INSTALL,$1)
-	$(Q)if [ ! -d '$(DESTDIR)$2' ]; then		\
+	if [ ! -d '$(DESTDIR)$2' ]; then		\
 		$(INSTALL) -d -m 755 '$(DESTDIR)$2';	\
-	fi;
-	$(Q)$(INSTALL) $(if $3,-m $3,) $1 '$(DESTDIR)$2'
+	fi;						\
+	$(INSTALL) $1 $(if $3,-m $3,) '$(DESTDIR)$2'
 endef
 
 # Preserve symlinks at installation.
 define do_s_install
-	$(call msg,INSTALL,$1)
-	$(Q)if [ ! -d '$(DESTDIR)$2' ]; then		\
+	if [ ! -d '$(DESTDIR)$2' ]; then		\
 		$(INSTALL) -d -m 755 '$(DESTDIR)$2';	\
-	fi;
-	$(Q)cp -fR $1 '$(DESTDIR)$2'
+	fi;						\
+	cp -fpR $1 '$(DESTDIR)$2'
 endef
 
 install: all install_headers install_pkgconfig
@@ -165,18 +134,13 @@ install_pkgconfig: $(PC_FILE)
 	$(call do_install,$(PC_FILE),$(LIBDIR)/pkgconfig,644)
 
 clean:
-	$(call msg,CLEAN)
-	$(Q)rm -rf *.o *.a *.so *.so.* *.pc $(SHARED_OBJDIR) $(STATIC_OBJDIR)
+	rm -rf *.o *.a *.so *.so.* *.pc $(SHARED_OBJDIR) $(STATIC_OBJDIR)
 
-.PHONY: cscope tags force
+.PHONY: cscope tags
 cscope:
-	$(call msg,CSCOPE)
-	$(Q)ls *.c *.h > cscope.files
-	$(Q)cscope -b -q -f cscope.out
+	ls *.c *.h > cscope.files
+	cscope -b -q -f cscope.out
 
 tags:
-	$(call msg,CTAGS)
-	$(Q)rm -f TAGS tags
-	$(Q)ls *.c *.h | xargs $(TAGS_PROG) -a
-
-force:
+	rm -f TAGS tags
+	ls *.c *.h | xargs $(TAGS_PROG) -a

src/README.rst

@@ -1,7 +1,7 @@
 .. SPDX-License-Identifier: (LGPL-2.1 OR BSD-2-Clause)
 
-API naming convention
-=====================
+libbpf API naming convention
+============================
 
 libbpf API provides access to a few logically separated groups of
 functions and types. Every group has its own naming convention
@@ -9,15 +9,15 @@ described here. It's recommended to follow these conventions whenever a
 new function or type is added to keep libbpf API clean and consistent.
 
 All types and functions provided by libbpf API should have one of the
-following prefixes: ``bpf_``, ``btf_``, ``libbpf_``, ``btf_dump_``,
-``ring_buffer_``, ``perf_buffer_``.
+following prefixes: ``bpf_``, ``btf_``, ``libbpf_``, ``xsk_``,
+``perf_buffer_``.
 
 System call wrappers
 --------------------
 
 System call wrappers are simple wrappers for commands supported by
 sys_bpf system call. These wrappers should go to ``bpf.h`` header file
-and map one to one to corresponding commands.
+and map one-on-one to corresponding commands.
 
 For example ``bpf_map_lookup_elem`` wraps ``BPF_MAP_LOOKUP_ELEM``
 command of sys_bpf, ``bpf_prog_attach`` wraps ``BPF_PROG_ATTACH``, etc.
@@ -49,6 +49,10 @@ object, ``bpf_object``, double underscore and ``open`` that defines the
 purpose of the function to open ELF file and create ``bpf_object`` from
 it.
 
+Another example: ``bpf_program__load`` is named for corresponding
+object, ``bpf_program``, that is separated from other part of the name
+by double underscore.
+
 All objects and corresponding functions other than BTF related should go
 to ``libbpf.h``. BTF types and functions should go to ``btf.h``.
 
@@ -59,8 +63,21 @@ Auxiliary functions and types that don't fit well in any of categories
 described above should have ``libbpf_`` prefix, e.g.
 ``libbpf_get_error`` or ``libbpf_prog_type_by_name``.
 
-ABI
----
+AF_XDP functions
+-------------------
+
+AF_XDP functions should have an ``xsk_`` prefix, e.g.
+``xsk_umem__get_data`` or ``xsk_umem__create``. The interface consists
+of both low-level ring access functions and high-level configuration
+functions. These can be mixed and matched. Note that these functions
+are not reentrant for performance reasons.
+
+Please take a look at Documentation/networking/af_xdp.rst in the Linux
+kernel source tree on how to use XDP sockets and for some common
+mistakes in case you do not get any traffic up to user space.
+
+libbpf ABI
+==========
 
 libbpf can be both linked statically or used as DSO. To avoid possible
 conflicts with other libraries an application is linked with, all
@@ -99,8 +116,7 @@ This bump in ABI version is at most once per kernel development cycle.
 
 For example, if current state of ``libbpf.map`` is:
 
-.. code-block:: none
-
+.. code-block::
         LIBBPF_0.0.1 {
         	global:
                         bpf_func_a;
@@ -112,8 +128,7 @@ For example, if current state of ``libbpf.map`` is:
 , and a new symbol ``bpf_func_c`` is being introduced, then
 ``libbpf.map`` should be changed like this:
 
-.. code-block:: none
-
+.. code-block::
         LIBBPF_0.0.1 {
         	global:
                         bpf_func_a;
@@ -133,7 +148,7 @@ Format of version script and ways to handle ABI changes, including
 incompatible ones, described in details in [1].
 
 Stand-alone build
--------------------
+=================
 
 Under https://github.com/libbpf/libbpf there is a (semi-)automated
 mirror of the mainline's version of libbpf for a stand-alone build.
@@ -141,53 +156,13 @@ mirror of the mainline's version of libbpf for a stand-alone build.
 However, all changes to libbpf's code base must be upstreamed through
 the mainline kernel tree.
 
-
-API documentation convention
-============================
-
-The libbpf API is documented via comments above definitions in
-header files. These comments can be rendered by doxygen and sphinx
-for well organized html output. This section describes the
-convention in which these comments should be formated.
-
-Here is an example from btf.h:
-
-.. code-block:: c
-
-        /**
-         * @brief **btf__new()** creates a new instance of a BTF object from the raw
-         * bytes of an ELF's BTF section
-         * @param data raw bytes
-         * @param size number of bytes passed in `data`
-         * @return new BTF object instance which has to be eventually freed with
-         * **btf__free()**
-         *
-         * On error, error-code-encoded-as-pointer is returned, not a NULL. To extract
-         * error code from such a pointer `libbpf_get_error()` should be used. If
-         * `libbpf_set_strict_mode(LIBBPF_STRICT_CLEAN_PTRS)` is enabled, NULL is
-         * returned on error instead. In both cases thread-local `errno` variable is
-         * always set to error code as well.
-         */
-
-The comment must start with a block comment of the form '/\*\*'.
-
-The documentation always starts with a @brief directive. This line is a short
-description about this API. It starts with the name of the API, denoted in bold
-like so: **api_name**. Please include an open and close parenthesis if this is a
-function. Follow with the short description of the API. A longer form description
-can be added below the last directive, at the bottom of the comment.
-
-Parameters are denoted with the @param directive, there should be one for each
-parameter. If this is a function with a non-void return, use the @return directive
-to document it.
-
 License
--------------------
+=======
 
 libbpf is dual-licensed under LGPL 2.1 and BSD 2-Clause.
 
 Links
--------------------
+=====
 
 [1] https://www.akkadia.org/drepper/dsohowto.pdf
     (Chapter 3. Maintaining APIs and ABIs).

src/bpf.h

@@ -29,99 +29,92 @@
 #include <stdint.h>
 
 #include "libbpf_common.h"
-#include "libbpf_legacy.h"
 
 #ifdef __cplusplus
 extern "C" {
 #endif
 
-int libbpf_set_memlock_rlim(size_t memlock_bytes);
-
-struct bpf_map_create_opts {
-	size_t sz; /* size of this struct for forward/backward compatibility */
-
+struct bpf_create_map_attr {
+	const char *name;
+	enum bpf_map_type map_type;
+	__u32 map_flags;
+	__u32 key_size;
+	__u32 value_size;
+	__u32 max_entries;
+	__u32 numa_node;
 	__u32 btf_fd;
 	__u32 btf_key_type_id;
 	__u32 btf_value_type_id;
-	__u32 btf_vmlinux_value_type_id;
-
-	__u32 inner_map_fd;
-	__u32 map_flags;
-	__u64 map_extra;
-
-	__u32 numa_node;
 	__u32 map_ifindex;
+	union {
+		__u32 inner_map_fd;
+		__u32 btf_vmlinux_value_type_id;
+	};
 };
-#define bpf_map_create_opts__last_field map_ifindex
 
-LIBBPF_API int bpf_map_create(enum bpf_map_type map_type,
-			      const char *map_name,
-			      __u32 key_size,
-			      __u32 value_size,
-			      __u32 max_entries,
-			      const struct bpf_map_create_opts *opts);
-
-struct bpf_prog_load_opts {
-	size_t sz; /* size of this struct for forward/backward compatibility */
-
-	/* libbpf can retry BPF_PROG_LOAD command if bpf() syscall returns
-	 * -EAGAIN. This field determines how many attempts libbpf has to
-	 *  make. If not specified, libbpf will use default value of 5.
-	 */
-	int attempts;
+LIBBPF_API int
+bpf_create_map_xattr(const struct bpf_create_map_attr *create_attr);
+LIBBPF_API int bpf_create_map_node(enum bpf_map_type map_type, const char *name,
+				   int key_size, int value_size,
+				   int max_entries, __u32 map_flags, int node);
+LIBBPF_API int bpf_create_map_name(enum bpf_map_type map_type, const char *name,
+				   int key_size, int value_size,
+				   int max_entries, __u32 map_flags);
+LIBBPF_API int bpf_create_map(enum bpf_map_type map_type, int key_size,
+			      int value_size, int max_entries, __u32 map_flags);
+LIBBPF_API int bpf_create_map_in_map_node(enum bpf_map_type map_type,
+					  const char *name, int key_size,
+					  int inner_map_fd, int max_entries,
+					  __u32 map_flags, int node);
+LIBBPF_API int bpf_create_map_in_map(enum bpf_map_type map_type,
+				     const char *name, int key_size,
+				     int inner_map_fd, int max_entries,
+				     __u32 map_flags);
 
+struct bpf_load_program_attr {
+	enum bpf_prog_type prog_type;
 	enum bpf_attach_type expected_attach_type;
+	const char *name;
+	const struct bpf_insn *insns;
+	size_t insns_cnt;
+	const char *license;
+	union {
+		__u32 kern_version;
+		__u32 attach_prog_fd;
+	};
+	union {
+		__u32 prog_ifindex;
+		__u32 attach_btf_id;
+	};
 	__u32 prog_btf_fd;
-	__u32 prog_flags;
-	__u32 prog_ifindex;
-	__u32 kern_version;
-
-	__u32 attach_btf_id;
-	__u32 attach_prog_fd;
-	__u32 attach_btf_obj_fd;
-
-	const int *fd_array;
-
-	/* .BTF.ext func info data */
+	__u32 func_info_rec_size;
 	const void *func_info;
 	__u32 func_info_cnt;
-	__u32 func_info_rec_size;
-
-	/* .BTF.ext line info data */
+	__u32 line_info_rec_size;
 	const void *line_info;
 	__u32 line_info_cnt;
-	__u32 line_info_rec_size;
-
-	/* verifier log options */
 	__u32 log_level;
-	__u32 log_size;
-	char *log_buf;
+	__u32 prog_flags;
 };
-#define bpf_prog_load_opts__last_field log_buf
-
-LIBBPF_API int bpf_prog_load(enum bpf_prog_type prog_type,
-			     const char *prog_name, const char *license,
-			     const struct bpf_insn *insns, size_t insn_cnt,
-			     const struct bpf_prog_load_opts *opts);
 
 /* Flags to direct loading requirements */
 #define MAPS_RELAX_COMPAT	0x01
 
-/* Recommended log buffer size */
+/* Recommend log buffer size */
 #define BPF_LOG_BUF_SIZE (UINT32_MAX >> 8) /* verifier maximum in kernels <= 5.1 */
-
-struct bpf_btf_load_opts {
-	size_t sz; /* size of this struct for forward/backward compatibility */
-
-	/* kernel log options */
-	char *log_buf;
-	__u32 log_level;
-	__u32 log_size;
-};
-#define bpf_btf_load_opts__last_field log_size
-
-LIBBPF_API int bpf_btf_load(const void *btf_data, size_t btf_size,
-			    const struct bpf_btf_load_opts *opts);
+LIBBPF_API int
+bpf_load_program_xattr(const struct bpf_load_program_attr *load_attr,
+		       char *log_buf, size_t log_buf_sz);
+LIBBPF_API int bpf_load_program(enum bpf_prog_type type,
+				const struct bpf_insn *insns, size_t insns_cnt,
+				const char *license, __u32 kern_version,
+				char *log_buf, size_t log_buf_sz);
+LIBBPF_API int bpf_verify_program(enum bpf_prog_type type,
+				  const struct bpf_insn *insns,
+				  size_t insns_cnt, __u32 prog_flags,
+				  const char *license, __u32 kern_version,
+				  char *log_buf, size_t log_buf_sz,
+				  int log_level);
 
 LIBBPF_API int bpf_map_update_elem(int fd, const void *key, const void *value,
 				   __u64 flags);
@@ -131,10 +124,7 @@ LIBBPF_API int bpf_map_lookup_elem_flags(int fd, const void *key, void *value,
 					 __u64 flags);
 LIBBPF_API int bpf_map_lookup_and_delete_elem(int fd, const void *key,
 					      void *value);
-LIBBPF_API int bpf_map_lookup_and_delete_elem_flags(int fd, const void *key,
-						    void *value, __u64 flags);
 LIBBPF_API int bpf_map_delete_elem(int fd, const void *key);
-LIBBPF_API int bpf_map_delete_elem_flags(int fd, const void *key, __u64 flags);
 LIBBPF_API int bpf_map_get_next_key(int fd, const void *key, void *next_key);
 LIBBPF_API int bpf_map_freeze(int fd);
 
@@ -145,144 +135,22 @@ struct bpf_map_batch_opts {
 };
 #define bpf_map_batch_opts__last_field flags
 
-
-/**
- * @brief **bpf_map_delete_batch()** allows for batch deletion of multiple
- * elements in a BPF map.
- *
- * @param fd BPF map file descriptor
- * @param keys pointer to an array of *count* keys
- * @param count input and output parameter; on input **count** represents the
- * number of  elements in the map to delete in batch;
- * on output if a non-EFAULT error is returned, **count** represents the number of deleted
- * elements if the output **count** value is not equal to the input **count** value
- * If EFAULT is returned, **count** should not be trusted to be correct.
- * @param opts options for configuring the way the batch deletion works
- * @return 0, on success; negative error code, otherwise (errno is also set to
- * the error code)
- */
-LIBBPF_API int bpf_map_delete_batch(int fd, const void *keys,
+LIBBPF_API int bpf_map_delete_batch(int fd, void *keys,
 				    __u32 *count,
 				    const struct bpf_map_batch_opts *opts);
-
-/**
- * @brief **bpf_map_lookup_batch()** allows for batch lookup of BPF map elements.
- *
- * The parameter *in_batch* is the address of the first element in the batch to read.
- * *out_batch* is an output parameter that should be passed as *in_batch* to subsequent
- * calls to **bpf_map_lookup_batch()**. NULL can be passed for *in_batch* to indicate
- * that the batched lookup starts from the beginning of the map.
- *
- * The *keys* and *values* are output parameters which must point to memory large enough to
- * hold *count* items based on the key and value size of the map *map_fd*. The *keys*
- * buffer must be of *key_size* * *count*. The *values* buffer must be of
- * *value_size* * *count*.
- *
- * @param fd BPF map file descriptor
- * @param in_batch address of the first element in batch to read, can pass NULL to
- * indicate that the batched lookup starts from the beginning of the map.
- * @param out_batch output parameter that should be passed to next call as *in_batch*
- * @param keys pointer to an array large enough for *count* keys
- * @param values pointer to an array large enough for *count* values
- * @param count input and output parameter; on input it's the number of elements
- * in the map to read in batch; on output it's the number of elements that were
- * successfully read.
- * If a non-EFAULT error is returned, count will be set as the number of elements
- * that were read before the error occurred.
- * If EFAULT is returned, **count** should not be trusted to be correct.
- * @param opts options for configuring the way the batch lookup works
- * @return 0, on success; negative error code, otherwise (errno is also set to
- * the error code)
- */
 LIBBPF_API int bpf_map_lookup_batch(int fd, void *in_batch, void *out_batch,
 				    void *keys, void *values, __u32 *count,
 				    const struct bpf_map_batch_opts *opts);
-
-/**
- * @brief **bpf_map_lookup_and_delete_batch()** allows for batch lookup and deletion
- * of BPF map elements where each element is deleted after being retrieved.
- *
- * @param fd BPF map file descriptor
- * @param in_batch address of the first element in batch to read, can pass NULL to
- * get address of the first element in *out_batch*
- * @param out_batch output parameter that should be passed to next call as *in_batch*
- * @param keys pointer to an array of *count* keys
- * @param values pointer to an array large enough for *count* values
- * @param count input and output parameter; on input it's the number of elements
- * in the map to read and delete in batch; on output it represents the number of
- * elements that were successfully read and deleted
- * If a non-**EFAULT** error code is returned and if the output **count** value
- * is not equal to the input **count** value, up to **count** elements may
- * have been deleted.
- * if **EFAULT** is returned up to *count* elements may have been deleted without
- * being returned via the *keys* and *values* output parameters.
- * @param opts options for configuring the way the batch lookup and delete works
- * @return 0, on success; negative error code, otherwise (errno is also set to
- * the error code)
- */
 LIBBPF_API int bpf_map_lookup_and_delete_batch(int fd, void *in_batch,
 					void *out_batch, void *keys,
 					void *values, __u32 *count,
 					const struct bpf_map_batch_opts *opts);
-
-/**
- * @brief **bpf_map_update_batch()** updates multiple elements in a map
- * by specifying keys and their corresponding values.
- *
- * The *keys* and *values* parameters must point to memory large enough
- * to hold *count* items based on the key and value size of the map.
- *
- * The *opts* parameter can be used to control how *bpf_map_update_batch()*
- * should handle keys that either do or do not already exist in the map.
- * In particular the *flags* parameter of *bpf_map_batch_opts* can be
- * one of the following:
- *
- * Note that *count* is an input and output parameter, where on output it
- * represents how many elements were successfully updated. Also note that if
- * **EFAULT** then *count* should not be trusted to be correct.
- *
- * **BPF_ANY**
- *    Create new elements or update existing.
- *
- * **BPF_NOEXIST**
- *    Create new elements only if they do not exist.
- *
- * **BPF_EXIST**
- *    Update existing elements.
- *
- * **BPF_F_LOCK**
- *    Update spin_lock-ed map elements. This must be
- *    specified if the map value contains a spinlock.
- *
- * @param fd BPF map file descriptor
- * @param keys pointer to an array of *count* keys
- * @param values pointer to an array of *count* values
- * @param count input and output parameter; on input it's the number of elements
- * in the map to update in batch; on output if a non-EFAULT error is returned,
- * **count** represents the number of updated elements if the output **count**
- * value is not equal to the input **count** value.
- * If EFAULT is returned, **count** should not be trusted to be correct.
- * @param opts options for configuring the way the batch update works
- * @return 0, on success; negative error code, otherwise (errno is also set to
- * the error code)
- */
-LIBBPF_API int bpf_map_update_batch(int fd, const void *keys, const void *values,
+LIBBPF_API int bpf_map_update_batch(int fd, void *keys, void *values,
 				    __u32 *count,
 				    const struct bpf_map_batch_opts *opts);
 
-struct bpf_obj_get_opts {
-	size_t sz; /* size of this struct for forward/backward compatibility */
-
-	__u32 file_flags;
-
-	size_t :0;
-};
-#define bpf_obj_get_opts__last_field file_flags
-
 LIBBPF_API int bpf_obj_pin(int fd, const char *pathname);
 LIBBPF_API int bpf_obj_get(const char *pathname);
-LIBBPF_API int bpf_obj_get_opts(const char *pathname,
-				const struct bpf_obj_get_opts *opts);
 
 struct bpf_prog_attach_opts {
 	size_t sz; /* size of this struct for forward/backward compatibility */
@@ -293,45 +161,22 @@ struct bpf_prog_attach_opts {
 
 LIBBPF_API int bpf_prog_attach(int prog_fd, int attachable_fd,
 			       enum bpf_attach_type type, unsigned int flags);
-LIBBPF_API int bpf_prog_attach_opts(int prog_fd, int attachable_fd,
+LIBBPF_API int bpf_prog_attach_xattr(int prog_fd, int attachable_fd,
 				     enum bpf_attach_type type,
 				     const struct bpf_prog_attach_opts *opts);
 LIBBPF_API int bpf_prog_detach(int attachable_fd, enum bpf_attach_type type);
 LIBBPF_API int bpf_prog_detach2(int prog_fd, int attachable_fd,
 				enum bpf_attach_type type);
 
-union bpf_iter_link_info; /* defined in up-to-date linux/bpf.h */
 struct bpf_link_create_opts {
 	size_t sz; /* size of this struct for forward/backward compatibility */
-	__u32 flags;
-	union bpf_iter_link_info *iter_info;
-	__u32 iter_info_len;
-	__u32 target_btf_id;
-	union {
-		struct {
-			__u64 bpf_cookie;
-		} perf_event;
-		struct {
-			__u32 flags;
-			__u32 cnt;
-			const char **syms;
-			const unsigned long *addrs;
-			const __u64 *cookies;
-		} kprobe_multi;
-		struct {
-			__u64 cookie;
-		} tracing;
-	};
-	size_t :0;
 };
-#define bpf_link_create_opts__last_field kprobe_multi.cookies
+#define bpf_link_create_opts__last_field sz
 
 LIBBPF_API int bpf_link_create(int prog_fd, int target_fd,
 			       enum bpf_attach_type attach_type,
 			       const struct bpf_link_create_opts *opts);
 
-LIBBPF_API int bpf_link_detach(int link_fd);
-
 struct bpf_link_update_opts {
 	size_t sz; /* size of this struct for forward/backward compatibility */
 	__u32 flags;	   /* extra flags */
@@ -361,6 +206,15 @@ struct bpf_prog_test_run_attr {
 			     * out: length of cxt_out */
 };
 
+LIBBPF_API int bpf_prog_test_run_xattr(struct bpf_prog_test_run_attr *test_attr);
+
+/*
+ * bpf_prog_test_run does not check that data_out is large enough. Consider
+ * using bpf_prog_test_run_xattr instead.
+ */
+LIBBPF_API int bpf_prog_test_run(int prog_fd, int repeat, void *data,
+				 __u32 size, void *data_out, __u32 *size_out,
+				 __u32 *retval, __u32 *duration);
 LIBBPF_API int bpf_prog_get_next_id(__u32 start_id, __u32 *next_id);
 LIBBPF_API int bpf_map_get_next_id(__u32 start_id, __u32 *next_id);
 LIBBPF_API int bpf_btf_get_next_id(__u32 start_id, __u32 *next_id);
@@ -370,25 +224,12 @@ LIBBPF_API int bpf_map_get_fd_by_id(__u32 id);
 LIBBPF_API int bpf_btf_get_fd_by_id(__u32 id);
 LIBBPF_API int bpf_link_get_fd_by_id(__u32 id);
 LIBBPF_API int bpf_obj_get_info_by_fd(int bpf_fd, void *info, __u32 *info_len);
-
-struct bpf_prog_query_opts {
-	size_t sz; /* size of this struct for forward/backward compatibility */
-	__u32 query_flags;
-	__u32 attach_flags; /* output argument */
-	__u32 *prog_ids;
-	__u32 prog_cnt; /* input+output argument */
-	__u32 *prog_attach_flags;
-};
-#define bpf_prog_query_opts__last_field prog_attach_flags
-
-LIBBPF_API int bpf_prog_query_opts(int target_fd,
-				   enum bpf_attach_type type,
-				   struct bpf_prog_query_opts *opts);
 LIBBPF_API int bpf_prog_query(int target_fd, enum bpf_attach_type type,
 			      __u32 query_flags, __u32 *attach_flags,
 			      __u32 *prog_ids, __u32 *prog_cnt);
-
 LIBBPF_API int bpf_raw_tracepoint_open(const char *name, int prog_fd);
+LIBBPF_API int bpf_load_btf(void *btf, __u32 btf_size, char *log_buf,
+			    __u32 log_buf_size, bool do_log);
 LIBBPF_API int bpf_task_fd_query(int pid, int fd, __u32 flags, char *buf,
 				 __u32 *buf_len, __u32 *prog_id, __u32 *fd_type,
 				 __u64 *probe_offset, __u64 *probe_addr);
@@ -396,41 +237,6 @@ LIBBPF_API int bpf_task_fd_query(int pid, int fd, __u32 flags, char *buf,
 enum bpf_stats_type; /* defined in up-to-date linux/bpf.h */
 LIBBPF_API int bpf_enable_stats(enum bpf_stats_type type);
 
-struct bpf_prog_bind_opts {
-	size_t sz; /* size of this struct for forward/backward compatibility */
-	__u32 flags;
-};
-#define bpf_prog_bind_opts__last_field flags
-
-LIBBPF_API int bpf_prog_bind_map(int prog_fd, int map_fd,
-				 const struct bpf_prog_bind_opts *opts);
-
-struct bpf_test_run_opts {
-	size_t sz; /* size of this struct for forward/backward compatibility */
-	const void *data_in; /* optional */
-	void *data_out;      /* optional */
-	__u32 data_size_in;
-	__u32 data_size_out; /* in: max length of data_out
-			      * out: length of data_out
-			      */
-	const void *ctx_in; /* optional */
-	void *ctx_out;      /* optional */
-	__u32 ctx_size_in;
-	__u32 ctx_size_out; /* in: max length of ctx_out
-			     * out: length of cxt_out
-			     */
-	__u32 retval;        /* out: return code of the BPF program */
-	int repeat;
-	__u32 duration;      /* out: average per repetition in ns */
-	__u32 flags;
-	__u32 cpu;
-	__u32 batch_size;
-};
-#define bpf_test_run_opts__last_field batch_size
-
-LIBBPF_API int bpf_prog_test_run_opts(int prog_fd,
-				      struct bpf_test_run_opts *opts);
-
 #ifdef __cplusplus
 } /* extern "C" */
 #endif

src/bpf_core_read.h

@@ -19,53 +19,32 @@ enum bpf_field_info_kind {
 	BPF_FIELD_RSHIFT_U64 = 5,
 };
 
-/* second argument to __builtin_btf_type_id() built-in */
-enum bpf_type_id_kind {
-	BPF_TYPE_ID_LOCAL = 0,		/* BTF type ID in local program */
-	BPF_TYPE_ID_TARGET = 1,		/* BTF type ID in target kernel */
-};
-
-/* second argument to __builtin_preserve_type_info() built-in */
-enum bpf_type_info_kind {
-	BPF_TYPE_EXISTS = 0,		/* type existence in target kernel */
-	BPF_TYPE_SIZE = 1,		/* type size in target kernel */
-	BPF_TYPE_MATCHES = 2,		/* type match in target kernel */
-};
-
-/* second argument to __builtin_preserve_enum_value() built-in */
-enum bpf_enum_value_kind {
-	BPF_ENUMVAL_EXISTS = 0,		/* enum value existence in kernel */
-	BPF_ENUMVAL_VALUE = 1,		/* enum value value relocation */
-};
-
 #define __CORE_RELO(src, field, info)					      \
 	__builtin_preserve_field_info((src)->field, BPF_FIELD_##info)
 
-#if __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__
+#if __BYTE_ORDER == __LITTLE_ENDIAN
 #define __CORE_BITFIELD_PROBE_READ(dst, src, fld)			      \
-	bpf_probe_read_kernel(						      \
-			(void *)dst,				      \
-			__CORE_RELO(src, fld, BYTE_SIZE),		      \
-			(const void *)src + __CORE_RELO(src, fld, BYTE_OFFSET))
+	bpf_probe_read((void *)dst,					      \
+		       __CORE_RELO(src, fld, BYTE_SIZE),		      \
+		       (const void *)src + __CORE_RELO(src, fld, BYTE_OFFSET))
 #else
 /* semantics of LSHIFT_64 assumes loading values into low-ordered bytes, so
  * for big-endian we need to adjust destination pointer accordingly, based on
  * field byte size
  */
 #define __CORE_BITFIELD_PROBE_READ(dst, src, fld)			      \
-	bpf_probe_read_kernel(						      \
-			(void *)dst + (8 - __CORE_RELO(src, fld, BYTE_SIZE)), \
-			__CORE_RELO(src, fld, BYTE_SIZE),		      \
-			(const void *)src + __CORE_RELO(src, fld, BYTE_OFFSET))
+	bpf_probe_read((void *)dst + (8 - __CORE_RELO(src, fld, BYTE_SIZE)),  \
+		       __CORE_RELO(src, fld, BYTE_SIZE),		      \
+		       (const void *)src + __CORE_RELO(src, fld, BYTE_OFFSET))
 #endif
 
 /*
  * Extract bitfield, identified by s->field, and return its value as u64.
  * All this is done in relocatable manner, so bitfield changes such as
  * signedness, bit size, offset changes, this will be handled automatically.
- * This version of macro is using bpf_probe_read_kernel() to read underlying
- * integer storage. Macro functions as an expression and its return type is
- * bpf_probe_read_kernel()'s return value: 0, on success, <0 on error.
+ * This version of macro is using bpf_probe_read() to read underlying integer
+ * storage. Macro functions as an expression and its return type is
+ * bpf_probe_read()'s return value: 0, on success, <0 on error.
  */
 #define BPF_CORE_READ_BITFIELD_PROBED(s, field) ({			      \
 	unsigned long long val = 0;					      \
@@ -89,19 +68,11 @@ enum bpf_enum_value_kind {
 	const void *p = (const void *)s + __CORE_RELO(s, field, BYTE_OFFSET); \
 	unsigned long long val;						      \
 									      \
-	/* This is a so-called barrier_var() operation that makes specified   \
-	 * variable "a black box" for optimizing compiler.		      \
-	 * It forces compiler to perform BYTE_OFFSET relocation on p and use  \
-	 * its calculated value in the switch below, instead of applying      \
-	 * the same relocation 4 times for each individual memory load.       \
-	 */								      \
-	asm volatile("" : "=r"(p) : "0"(p));				      \
-									      \
 	switch (__CORE_RELO(s, field, BYTE_SIZE)) {			      \
-	case 1: val = *(const unsigned char *)p; break;			      \
-	case 2: val = *(const unsigned short *)p; break;		      \
-	case 4: val = *(const unsigned int *)p; break;			      \
-	case 8: val = *(const unsigned long long *)p; break;		      \
+	case 1: val = *(const unsigned char *)p;			      \
+	case 2: val = *(const unsigned short *)p;			      \
+	case 4: val = *(const unsigned int *)p;				      \
+	case 8: val = *(const unsigned long long *)p;			      \
 	}								      \
 	val <<= __CORE_RELO(s, field, LSHIFT_U64);			      \
 	if (__CORE_RELO(s, field, SIGNED))				      \
@@ -111,124 +82,25 @@ enum bpf_enum_value_kind {
 	val;								      \
 })
 
-#define ___bpf_field_ref1(field)	(field)
-#define ___bpf_field_ref2(type, field)	(((typeof(type) *)0)->field)
-#define ___bpf_field_ref(args...)					    \
-	___bpf_apply(___bpf_field_ref, ___bpf_narg(args))(args)
-
 /*
  * Convenience macro to check that field actually exists in target kernel's.
  * Returns:
  *    1, if matching field is present in target kernel;
  *    0, if no matching field found.
- *
- * Supports two forms:
- *   - field reference through variable access:
- *     bpf_core_field_exists(p->my_field);
- *   - field reference through type and field names:
- *     bpf_core_field_exists(struct my_type, my_field).
  */
-#define bpf_core_field_exists(field...)					    \
-	__builtin_preserve_field_info(___bpf_field_ref(field), BPF_FIELD_EXISTS)
+#define bpf_core_field_exists(field)					    \
+	__builtin_preserve_field_info(field, BPF_FIELD_EXISTS)
 
 /*
- * Convenience macro to get the byte size of a field. Works for integers,
+ * Convenience macro to get byte size of a field. Works for integers,
  * struct/unions, pointers, arrays, and enums.
- *
- * Supports two forms:
- *   - field reference through variable access:
- *     bpf_core_field_size(p->my_field);
- *   - field reference through type and field names:
- *     bpf_core_field_size(struct my_type, my_field).
  */
-#define bpf_core_field_size(field...)					    \
-	__builtin_preserve_field_info(___bpf_field_ref(field), BPF_FIELD_BYTE_SIZE)
+#define bpf_core_field_size(field)					    \
+	__builtin_preserve_field_info(field, BPF_FIELD_BYTE_SIZE)
 
 /*
- * Convenience macro to get field's byte offset.
- *
- * Supports two forms:
- *   - field reference through variable access:
- *     bpf_core_field_offset(p->my_field);
- *   - field reference through type and field names:
- *     bpf_core_field_offset(struct my_type, my_field).
- */
-#define bpf_core_field_offset(field...)					    \
-	__builtin_preserve_field_info(___bpf_field_ref(field), BPF_FIELD_BYTE_OFFSET)
-
-/*
- * Convenience macro to get BTF type ID of a specified type, using a local BTF
- * information. Return 32-bit unsigned integer with type ID from program's own
- * BTF. Always succeeds.
- */
-#define bpf_core_type_id_local(type)					    \
-	__builtin_btf_type_id(*(typeof(type) *)0, BPF_TYPE_ID_LOCAL)
-
-/*
- * Convenience macro to get BTF type ID of a target kernel's type that matches
- * specified local type.
- * Returns:
- *    - valid 32-bit unsigned type ID in kernel BTF;
- *    - 0, if no matching type was found in a target kernel BTF.
- */
-#define bpf_core_type_id_kernel(type)					    \
-	__builtin_btf_type_id(*(typeof(type) *)0, BPF_TYPE_ID_TARGET)
-
-/*
- * Convenience macro to check that provided named type
- * (struct/union/enum/typedef) exists in a target kernel.
- * Returns:
- *    1, if such type is present in target kernel's BTF;
- *    0, if no matching type is found.
- */
-#define bpf_core_type_exists(type)					    \
-	__builtin_preserve_type_info(*(typeof(type) *)0, BPF_TYPE_EXISTS)
-
-/*
- * Convenience macro to check that provided named type
- * (struct/union/enum/typedef) "matches" that in a target kernel.
- * Returns:
- *    1, if the type matches in the target kernel's BTF;
- *    0, if the type does not match any in the target kernel
- */
-#define bpf_core_type_matches(type)					    \
-	__builtin_preserve_type_info(*(typeof(type) *)0, BPF_TYPE_MATCHES)
-
-/*
- * Convenience macro to get the byte size of a provided named type
- * (struct/union/enum/typedef) in a target kernel.
- * Returns:
- *    >= 0 size (in bytes), if type is present in target kernel's BTF;
- *    0, if no matching type is found.
- */
-#define bpf_core_type_size(type)					    \
-	__builtin_preserve_type_info(*(typeof(type) *)0, BPF_TYPE_SIZE)
-
-/*
- * Convenience macro to check that provided enumerator value is defined in
- * a target kernel.
- * Returns:
- *    1, if specified enum type and its enumerator value are present in target
- *    kernel's BTF;
- *    0, if no matching enum and/or enum value within that enum is found.
- */
-#define bpf_core_enum_value_exists(enum_type, enum_value)		    \
-	__builtin_preserve_enum_value(*(typeof(enum_type) *)enum_value, BPF_ENUMVAL_EXISTS)
-
-/*
- * Convenience macro to get the integer value of an enumerator value in
- * a target kernel.
- * Returns:
- *    64-bit value, if specified enum type and its enumerator value are
- *    present in target kernel's BTF;
- *    0, if no matching enum and/or enum value within that enum is found.
- */
-#define bpf_core_enum_value(enum_type, enum_value)			    \
-	__builtin_preserve_enum_value(*(typeof(enum_type) *)enum_value, BPF_ENUMVAL_VALUE)
-
-/*
- * bpf_core_read() abstracts away bpf_probe_read_kernel() call and captures
- * offset relocation for source address using __builtin_preserve_access_index()
+ * bpf_core_read() abstracts away bpf_probe_read() call and captures offset
+ * relocation for source address using __builtin_preserve_access_index()
  * built-in, provided by Clang.
  *
  * __builtin_preserve_access_index() takes as an argument an expression of
@@ -243,22 +115,17 @@ enum bpf_enum_value_kind {
  * (local) BTF, used to record relocation.
  */
 #define bpf_core_read(dst, sz, src)					    \
-	bpf_probe_read_kernel(dst, sz, (const void *)__builtin_preserve_access_index(src))
+	bpf_probe_read(dst, sz,						    \
+		       (const void *)__builtin_preserve_access_index(src))
 
-/* NOTE: see comments for BPF_CORE_READ_USER() about the proper types use. */
-#define bpf_core_read_user(dst, sz, src)				    \
-	bpf_probe_read_user(dst, sz, (const void *)__builtin_preserve_access_index(src))
 /*
  * bpf_core_read_str() is a thin wrapper around bpf_probe_read_str()
  * additionally emitting BPF CO-RE field relocation for specified source
  * argument.
  */
 #define bpf_core_read_str(dst, sz, src)					    \
-	bpf_probe_read_kernel_str(dst, sz, (const void *)__builtin_preserve_access_index(src))
-
-/* NOTE: see comments for BPF_CORE_READ_USER() about the proper types use. */
-#define bpf_core_read_user_str(dst, sz, src)				    \
-	bpf_probe_read_user_str(dst, sz, (const void *)__builtin_preserve_access_index(src))
+	bpf_probe_read_str(dst, sz,					    \
+			   (const void *)__builtin_preserve_access_index(src))
 
 #define ___concat(a, b) a ## b
 #define ___apply(fn, n) ___concat(fn, n)
@@ -317,29 +184,30 @@ enum bpf_enum_value_kind {
 	read_fn((void *)(dst), sizeof(*(dst)), &((src_type)(src))->accessor)
 
 /* "recursively" read a sequence of inner pointers using local __t var */
-#define ___rd_first(fn, src, a) ___read(fn, &__t, ___type(src), src, a);
-#define ___rd_last(fn, ...)						    \
-	___read(fn, &__t, ___type(___nolast(__VA_ARGS__)), __t, ___last(__VA_ARGS__));
-#define ___rd_p1(fn, ...) const void *__t; ___rd_first(fn, __VA_ARGS__)
-#define ___rd_p2(fn, ...) ___rd_p1(fn, ___nolast(__VA_ARGS__)) ___rd_last(fn, __VA_ARGS__)
-#define ___rd_p3(fn, ...) ___rd_p2(fn, ___nolast(__VA_ARGS__)) ___rd_last(fn, __VA_ARGS__)
-#define ___rd_p4(fn, ...) ___rd_p3(fn, ___nolast(__VA_ARGS__)) ___rd_last(fn, __VA_ARGS__)
-#define ___rd_p5(fn, ...) ___rd_p4(fn, ___nolast(__VA_ARGS__)) ___rd_last(fn, __VA_ARGS__)
-#define ___rd_p6(fn, ...) ___rd_p5(fn, ___nolast(__VA_ARGS__)) ___rd_last(fn, __VA_ARGS__)
-#define ___rd_p7(fn, ...) ___rd_p6(fn, ___nolast(__VA_ARGS__)) ___rd_last(fn, __VA_ARGS__)
-#define ___rd_p8(fn, ...) ___rd_p7(fn, ___nolast(__VA_ARGS__)) ___rd_last(fn, __VA_ARGS__)
-#define ___rd_p9(fn, ...) ___rd_p8(fn, ___nolast(__VA_ARGS__)) ___rd_last(fn, __VA_ARGS__)
-#define ___read_ptrs(fn, src, ...)					    \
-	___apply(___rd_p, ___narg(__VA_ARGS__))(fn, src, __VA_ARGS__)
+#define ___rd_first(src, a) ___read(bpf_core_read, &__t, ___type(src), src, a);
+#define ___rd_last(...)							    \
+	___read(bpf_core_read, &__t,					    \
+		___type(___nolast(__VA_ARGS__)), __t, ___last(__VA_ARGS__));
+#define ___rd_p1(...) const void *__t; ___rd_first(__VA_ARGS__)
+#define ___rd_p2(...) ___rd_p1(___nolast(__VA_ARGS__)) ___rd_last(__VA_ARGS__)
+#define ___rd_p3(...) ___rd_p2(___nolast(__VA_ARGS__)) ___rd_last(__VA_ARGS__)
+#define ___rd_p4(...) ___rd_p3(___nolast(__VA_ARGS__)) ___rd_last(__VA_ARGS__)
+#define ___rd_p5(...) ___rd_p4(___nolast(__VA_ARGS__)) ___rd_last(__VA_ARGS__)
+#define ___rd_p6(...) ___rd_p5(___nolast(__VA_ARGS__)) ___rd_last(__VA_ARGS__)
+#define ___rd_p7(...) ___rd_p6(___nolast(__VA_ARGS__)) ___rd_last(__VA_ARGS__)
+#define ___rd_p8(...) ___rd_p7(___nolast(__VA_ARGS__)) ___rd_last(__VA_ARGS__)
+#define ___rd_p9(...) ___rd_p8(___nolast(__VA_ARGS__)) ___rd_last(__VA_ARGS__)
+#define ___read_ptrs(src, ...)						    \
+	___apply(___rd_p, ___narg(__VA_ARGS__))(src, __VA_ARGS__)
 
-#define ___core_read0(fn, fn_ptr, dst, src, a)				    \
+#define ___core_read0(fn, dst, src, a)					    \
 	___read(fn, dst, ___type(src), src, a);
-#define ___core_readN(fn, fn_ptr, dst, src, ...)			    \
-	___read_ptrs(fn_ptr, src, ___nolast(__VA_ARGS__))		    \
+#define ___core_readN(fn, dst, src, ...)				    \
+	___read_ptrs(src, ___nolast(__VA_ARGS__))			    \
 	___read(fn, dst, ___type(src, ___nolast(__VA_ARGS__)), __t,	    \
 		___last(__VA_ARGS__));
-#define ___core_read(fn, fn_ptr, dst, src, a, ...)			    \
-	___apply(___core_read, ___empty(__VA_ARGS__))(fn, fn_ptr, dst,	    \
+#define ___core_read(fn, dst, src, a, ...)				    \
+	___apply(___core_read, ___empty(__VA_ARGS__))(fn, dst,		    \
 						      src, a, ##__VA_ARGS__)
 
 /*
@@ -347,73 +215,20 @@ enum bpf_enum_value_kind {
  * BPF_CORE_READ(), in which final field is read into user-provided storage.
  * See BPF_CORE_READ() below for more details on general usage.
  */
-#define BPF_CORE_READ_INTO(dst, src, a, ...) ({				    \
-	___core_read(bpf_core_read, bpf_core_read,			    \
-		     dst, (src), a, ##__VA_ARGS__)			    \
-})
-
-/*
- * Variant of BPF_CORE_READ_INTO() for reading from user-space memory.
- *
- * NOTE: see comments for BPF_CORE_READ_USER() about the proper types use.
- */
-#define BPF_CORE_READ_USER_INTO(dst, src, a, ...) ({			    \
-	___core_read(bpf_core_read_user, bpf_core_read_user,		    \
-		     dst, (src), a, ##__VA_ARGS__)			    \
-})
-
-/* Non-CO-RE variant of BPF_CORE_READ_INTO() */
-#define BPF_PROBE_READ_INTO(dst, src, a, ...) ({			    \
-	___core_read(bpf_probe_read, bpf_probe_read,			    \
-		     dst, (src), a, ##__VA_ARGS__)			    \
-})
-
-/* Non-CO-RE variant of BPF_CORE_READ_USER_INTO().
- *
- * As no CO-RE relocations are emitted, source types can be arbitrary and are
- * not restricted to kernel types only.
- */
-#define BPF_PROBE_READ_USER_INTO(dst, src, a, ...) ({			    \
-	___core_read(bpf_probe_read_user, bpf_probe_read_user,		    \
-		     dst, (src), a, ##__VA_ARGS__)			    \
-})
+#define BPF_CORE_READ_INTO(dst, src, a, ...)				    \
+	({								    \
+		___core_read(bpf_core_read, dst, src, a, ##__VA_ARGS__)	    \
+	})
 
 /*
  * BPF_CORE_READ_STR_INTO() does same "pointer chasing" as
  * BPF_CORE_READ() for intermediate pointers, but then executes (and returns
  * corresponding error code) bpf_core_read_str() for final string read.
  */
-#define BPF_CORE_READ_STR_INTO(dst, src, a, ...) ({			    \
-	___core_read(bpf_core_read_str, bpf_core_read,			    \
-		     dst, (src), a, ##__VA_ARGS__)			    \
-})
-
-/*
- * Variant of BPF_CORE_READ_STR_INTO() for reading from user-space memory.
- *
- * NOTE: see comments for BPF_CORE_READ_USER() about the proper types use.
- */
-#define BPF_CORE_READ_USER_STR_INTO(dst, src, a, ...) ({		    \
-	___core_read(bpf_core_read_user_str, bpf_core_read_user,	    \
-		     dst, (src), a, ##__VA_ARGS__)			    \
-})
-
-/* Non-CO-RE variant of BPF_CORE_READ_STR_INTO() */
-#define BPF_PROBE_READ_STR_INTO(dst, src, a, ...) ({			    \
-	___core_read(bpf_probe_read_str, bpf_probe_read,		    \
-		     dst, (src), a, ##__VA_ARGS__)			    \
-})
-
-/*
- * Non-CO-RE variant of BPF_CORE_READ_USER_STR_INTO().
- *
- * As no CO-RE relocations are emitted, source types can be arbitrary and are
- * not restricted to kernel types only.
- */
-#define BPF_PROBE_READ_USER_STR_INTO(dst, src, a, ...) ({		    \
-	___core_read(bpf_probe_read_user_str, bpf_probe_read_user,	    \
-		     dst, (src), a, ##__VA_ARGS__)			    \
-})
+#define BPF_CORE_READ_STR_INTO(dst, src, a, ...)			    \
+	({								    \
+		___core_read(bpf_core_read_str, dst, src, a, ##__VA_ARGS__) \
+	})
 
 /*
  * BPF_CORE_READ() is used to simplify BPF CO-RE relocatable read, especially
@@ -424,61 +239,25 @@ enum bpf_enum_value_kind {
  *	int x = BPF_CORE_READ(s, a.b.c, d.e, f, g);
  *
  * BPF_CORE_READ will decompose above statement into 4 bpf_core_read (BPF
- * CO-RE relocatable bpf_probe_read_kernel() wrapper) calls, logically
- * equivalent to:
+ * CO-RE relocatable bpf_probe_read() wrapper) calls, logically equivalent to:
  * 1. const void *__t = s->a.b.c;
  * 2. __t = __t->d.e;
  * 3. __t = __t->f;
  * 4. return __t->g;
  *
  * Equivalence is logical, because there is a heavy type casting/preservation
- * involved, as well as all the reads are happening through
- * bpf_probe_read_kernel() calls using __builtin_preserve_access_index() to
- * emit CO-RE relocations.
+ * involved, as well as all the reads are happening through bpf_probe_read()
+ * calls using __builtin_preserve_access_index() to emit CO-RE relocations.
  *
  * N.B. Only up to 9 "field accessors" are supported, which should be more
  * than enough for any practical purpose.
  */
-#define BPF_CORE_READ(src, a, ...) ({					    \
-	___type((src), a, ##__VA_ARGS__) __r;				    \
-	BPF_CORE_READ_INTO(&__r, (src), a, ##__VA_ARGS__);		    \
-	__r;								    \
-})
-
-/*
- * Variant of BPF_CORE_READ() for reading from user-space memory.
- *
- * NOTE: all the source types involved are still *kernel types* and need to
- * exist in kernel (or kernel module) BTF, otherwise CO-RE relocation will
- * fail. Custom user types are not relocatable with CO-RE.
- * The typical situation in which BPF_CORE_READ_USER() might be used is to
- * read kernel UAPI types from the user-space memory passed in as a syscall
- * input argument.
- */
-#define BPF_CORE_READ_USER(src, a, ...) ({				    \
-	___type((src), a, ##__VA_ARGS__) __r;				    \
-	BPF_CORE_READ_USER_INTO(&__r, (src), a, ##__VA_ARGS__);		    \
-	__r;								    \
-})
-
-/* Non-CO-RE variant of BPF_CORE_READ() */
-#define BPF_PROBE_READ(src, a, ...) ({					    \
-	___type((src), a, ##__VA_ARGS__) __r;				    \
-	BPF_PROBE_READ_INTO(&__r, (src), a, ##__VA_ARGS__);		    \
-	__r;								    \
-})
-
-/*
- * Non-CO-RE variant of BPF_CORE_READ_USER().
- *
- * As no CO-RE relocations are emitted, source types can be arbitrary and are
- * not restricted to kernel types only.
- */
-#define BPF_PROBE_READ_USER(src, a, ...) ({				    \
-	___type((src), a, ##__VA_ARGS__) __r;				    \
-	BPF_PROBE_READ_USER_INTO(&__r, (src), a, ##__VA_ARGS__);	    \
-	__r;								    \
-})
+#define BPF_CORE_READ(src, a, ...)					    \
+	({								    \
+		___type(src, a, ##__VA_ARGS__) __r;			    \
+		BPF_CORE_READ_INTO(&__r, src, a, ##__VA_ARGS__);	    \
+		__r;							    \
+	})
 
 #endif
 

src/bpf_endian.h

@@ -2,35 +2,8 @@
 #ifndef __BPF_ENDIAN__
 #define __BPF_ENDIAN__
 
-/*
- * Isolate byte #n and put it into byte #m, for __u##b type.
- * E.g., moving byte #6 (nnnnnnnn) into byte #1 (mmmmmmmm) for __u64:
- * 1) xxxxxxxx nnnnnnnn xxxxxxxx xxxxxxxx xxxxxxxx xxxxxxxx mmmmmmmm xxxxxxxx
- * 2) nnnnnnnn xxxxxxxx xxxxxxxx xxxxxxxx xxxxxxxx mmmmmmmm xxxxxxxx 00000000
- * 3) 00000000 00000000 00000000 00000000 00000000 00000000 00000000 nnnnnnnn
- * 4) 00000000 00000000 00000000 00000000 00000000 00000000 nnnnnnnn 00000000
- */
-#define ___bpf_mvb(x, b, n, m) ((__u##b)(x) << (b-(n+1)*8) >> (b-8) << (m*8))
-
-#define ___bpf_swab16(x) ((__u16)(			\
-			  ___bpf_mvb(x, 16, 0, 1) |	\
-			  ___bpf_mvb(x, 16, 1, 0)))
-
-#define ___bpf_swab32(x) ((__u32)(			\
-			  ___bpf_mvb(x, 32, 0, 3) |	\
-			  ___bpf_mvb(x, 32, 1, 2) |	\
-			  ___bpf_mvb(x, 32, 2, 1) |	\
-			  ___bpf_mvb(x, 32, 3, 0)))
-
-#define ___bpf_swab64(x) ((__u64)(			\
-			  ___bpf_mvb(x, 64, 0, 7) |	\
-			  ___bpf_mvb(x, 64, 1, 6) |	\
-			  ___bpf_mvb(x, 64, 2, 5) |	\
-			  ___bpf_mvb(x, 64, 3, 4) |	\
-			  ___bpf_mvb(x, 64, 4, 3) |	\
-			  ___bpf_mvb(x, 64, 5, 2) |	\
-			  ___bpf_mvb(x, 64, 6, 1) |	\
-			  ___bpf_mvb(x, 64, 7, 0)))
+#include <linux/stddef.h>
+#include <linux/swab.h>
 
 /* LLVM's BPF target selects the endianness of the CPU
  * it compiles on, or the user specifies (bpfel/bpfeb),
@@ -50,16 +23,16 @@
 #if __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__
 # define __bpf_ntohs(x)			__builtin_bswap16(x)
 # define __bpf_htons(x)			__builtin_bswap16(x)
-# define __bpf_constant_ntohs(x)	___bpf_swab16(x)
-# define __bpf_constant_htons(x)	___bpf_swab16(x)
+# define __bpf_constant_ntohs(x)	___constant_swab16(x)
+# define __bpf_constant_htons(x)	___constant_swab16(x)
 # define __bpf_ntohl(x)			__builtin_bswap32(x)
 # define __bpf_htonl(x)			__builtin_bswap32(x)
-# define __bpf_constant_ntohl(x)	___bpf_swab32(x)
-# define __bpf_constant_htonl(x)	___bpf_swab32(x)
+# define __bpf_constant_ntohl(x)	___constant_swab32(x)
+# define __bpf_constant_htonl(x)	___constant_swab32(x)
 # define __bpf_be64_to_cpu(x)		__builtin_bswap64(x)
 # define __bpf_cpu_to_be64(x)		__builtin_bswap64(x)
-# define __bpf_constant_be64_to_cpu(x)	___bpf_swab64(x)
-# define __bpf_constant_cpu_to_be64(x)	___bpf_swab64(x)
+# define __bpf_constant_be64_to_cpu(x)	___constant_swab64(x)
+# define __bpf_constant_cpu_to_be64(x)	___constant_swab64(x)
 #elif __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__
 # define __bpf_ntohs(x)			(x)
 # define __bpf_htons(x)			(x)

src/bpf_gen_internal.h

@@ -1,72 +0,0 @@
-/* SPDX-License-Identifier: (LGPL-2.1 OR BSD-2-Clause) */
-/* Copyright (c) 2021 Facebook */
-#ifndef __BPF_GEN_INTERNAL_H
-#define __BPF_GEN_INTERNAL_H
-
-#include "bpf.h"
-
-struct ksym_relo_desc {
-	const char *name;
-	int kind;
-	int insn_idx;
-	bool is_weak;
-	bool is_typeless;
-};
-
-struct ksym_desc {
-	const char *name;
-	int ref;
-	int kind;
-	union {
-		/* used for kfunc */
-		int off;
-		/* used for typeless ksym */
-		bool typeless;
-	};
-	int insn;
-};
-
-struct bpf_gen {
-	struct gen_loader_opts *opts;
-	void *data_start;
-	void *data_cur;
-	void *insn_start;
-	void *insn_cur;
-	ssize_t cleanup_label;
-	__u32 nr_progs;
-	__u32 nr_maps;
-	int log_level;
-	int error;
-	struct ksym_relo_desc *relos;
-	int relo_cnt;
-	struct bpf_core_relo *core_relos;
-	int core_relo_cnt;
-	char attach_target[128];
-	int attach_kind;
-	struct ksym_desc *ksyms;
-	__u32 nr_ksyms;
-	int fd_array;
-	int nr_fd_array;
-};
-
-void bpf_gen__init(struct bpf_gen *gen, int log_level, int nr_progs, int nr_maps);
-int bpf_gen__finish(struct bpf_gen *gen, int nr_progs, int nr_maps);
-void bpf_gen__free(struct bpf_gen *gen);
-void bpf_gen__load_btf(struct bpf_gen *gen, const void *raw_data, __u32 raw_size);
-void bpf_gen__map_create(struct bpf_gen *gen,
-			 enum bpf_map_type map_type, const char *map_name,
-			 __u32 key_size, __u32 value_size, __u32 max_entries,
-			 struct bpf_map_create_opts *map_attr, int map_idx);
-void bpf_gen__prog_load(struct bpf_gen *gen,
-			enum bpf_prog_type prog_type, const char *prog_name,
-			const char *license, struct bpf_insn *insns, size_t insn_cnt,
-			struct bpf_prog_load_opts *load_attr, int prog_idx);
-void bpf_gen__map_update_elem(struct bpf_gen *gen, int map_idx, void *value, __u32 value_size);
-void bpf_gen__map_freeze(struct bpf_gen *gen, int map_idx);
-void bpf_gen__record_attach_target(struct bpf_gen *gen, const char *name, enum bpf_attach_type type);
-void bpf_gen__record_extern(struct bpf_gen *gen, const char *name, bool is_weak,
-			    bool is_typeless, int kind, int insn_idx);
-void bpf_gen__record_relo_core(struct bpf_gen *gen, const struct bpf_core_relo *core_relo);
-void bpf_gen__populate_outer_map(struct bpf_gen *gen, int outer_map_idx, int key, int inner_map_idx);
-
-#endif

src/bpf_helpers.h

@@ -14,71 +14,33 @@
 #define __type(name, val) typeof(val) *name
 #define __array(name, val) typeof(val) *name[]
 
+/* Helper macro to print out debug messages */
+#define bpf_printk(fmt, ...)				\
+({							\
+	char ____fmt[] = fmt;				\
+	bpf_trace_printk(____fmt, sizeof(____fmt),	\
+			 ##__VA_ARGS__);		\
+})
+
 /*
  * Helper macro to place programs, maps, license in
  * different sections in elf_bpf file. Section names
- * are interpreted by libbpf depending on the context (BPF programs, BPF maps,
- * extern variables, etc).
- * To allow use of SEC() with externs (e.g., for extern .maps declarations),
- * make sure __attribute__((unused)) doesn't trigger compilation warning.
+ * are interpreted by elf_bpf loader
  */
-#if __GNUC__ && !__clang__
+#define SEC(NAME) __attribute__((section(NAME), used))
 
-/*
- * Pragma macros are broken on GCC
- * https://gcc.gnu.org/bugzilla/show_bug.cgi?id=55578
- * https://gcc.gnu.org/bugzilla/show_bug.cgi?id=90400
- */
-#define SEC(name) __attribute__((section(name), used))
-
-#else
-
-#define SEC(name) \
-	_Pragma("GCC diagnostic push")					    \
-	_Pragma("GCC diagnostic ignored \"-Wignored-attributes\"")	    \
-	__attribute__((section(name), used))				    \
-	_Pragma("GCC diagnostic pop")					    \
-
-#endif
-
-/* Avoid 'linux/stddef.h' definition of '__always_inline'. */
-#undef __always_inline
-#define __always_inline inline __attribute__((always_inline))
-
-#ifndef __noinline
-#define __noinline __attribute__((noinline))
+#ifndef __always_inline
+#define __always_inline __attribute__((always_inline))
 #endif
 #ifndef __weak
 #define __weak __attribute__((weak))
 #endif
 
 /*
- * Use __hidden attribute to mark a non-static BPF subprogram effectively
- * static for BPF verifier's verification algorithm purposes, allowing more
- * extensive and permissive BPF verification process, taking into account
- * subprogram's caller context.
- */
-#define __hidden __attribute__((visibility("hidden")))
-
-/* When utilizing vmlinux.h with BPF CO-RE, user BPF programs can't include
- * any system-level headers (such as stddef.h, linux/version.h, etc), and
- * commonly-used macros like NULL and KERNEL_VERSION aren't available through
- * vmlinux.h. This just adds unnecessary hurdles and forces users to re-define
- * them on their own. So as a convenience, provide such definitions here.
- */
-#ifndef NULL
-#define NULL ((void *)0)
-#endif
-
-#ifndef KERNEL_VERSION
-#define KERNEL_VERSION(a, b, c) (((a) << 16) + ((b) << 8) + ((c) > 255 ? 255 : (c)))
-#endif
-
-/*
- * Helper macros to manipulate data structures
+ * Helper macro to manipulate data structures
  */
 #ifndef offsetof
-#define offsetof(TYPE, MEMBER)	((unsigned long)&((TYPE *)0)->MEMBER)
+#define offsetof(TYPE, MEMBER)  ((size_t)&((TYPE *)0)->MEMBER)
 #endif
 #ifndef container_of
 #define container_of(ptr, type, member)				\
@@ -89,76 +51,16 @@
 #endif
 
 /*
- * Compiler (optimization) barrier.
+ * Helper structure used by eBPF C program
+ * to describe BPF map attributes to libbpf loader
  */
-#ifndef barrier
-#define barrier() asm volatile("" ::: "memory")
-#endif
-
-/* Variable-specific compiler (optimization) barrier. It's a no-op which makes
- * compiler believe that there is some black box modification of a given
- * variable and thus prevents compiler from making extra assumption about its
- * value and potential simplifications and optimizations on this variable.
- *
- * E.g., compiler might often delay or even omit 32-bit to 64-bit casting of
- * a variable, making some code patterns unverifiable. Putting barrier_var()
- * in place will ensure that cast is performed before the barrier_var()
- * invocation, because compiler has to pessimistically assume that embedded
- * asm section might perform some extra operations on that variable.
- *
- * This is a variable-specific variant of more global barrier().
- */
-#ifndef barrier_var
-#define barrier_var(var) asm volatile("" : "=r"(var) : "0"(var))
-#endif
-
-/*
- * Helper macro to throw a compilation error if __bpf_unreachable() gets
- * built into the resulting code. This works given BPF back end does not
- * implement __builtin_trap(). This is useful to assert that certain paths
- * of the program code are never used and hence eliminated by the compiler.
- *
- * For example, consider a switch statement that covers known cases used by
- * the program. __bpf_unreachable() can then reside in the default case. If
- * the program gets extended such that a case is not covered in the switch
- * statement, then it will throw a build error due to the default case not
- * being compiled out.
- */
-#ifndef __bpf_unreachable
-# define __bpf_unreachable()	__builtin_trap()
-#endif
-
-/*
- * Helper function to perform a tail call with a constant/immediate map slot.
- */
-#if __clang_major__ >= 8 && defined(__bpf__)
-static __always_inline void
-bpf_tail_call_static(void *ctx, const void *map, const __u32 slot)
-{
-	if (!__builtin_constant_p(slot))
-		__bpf_unreachable();
-
-	/*
-	 * Provide a hard guarantee that LLVM won't optimize setting r2 (map
-	 * pointer) and r3 (constant map index) from _different paths_ ending
-	 * up at the _same_ call insn as otherwise we won't be able to use the
-	 * jmpq/nopl retpoline-free patching by the x86-64 JIT in the kernel
-	 * given they mismatch. See also d2e4c1e6c294 ("bpf: Constant map key
-	 * tracking for prog array pokes") for details on verifier tracking.
-	 *
-	 * Note on clobber list: we need to stay in-line with BPF calling
-	 * convention, so even if we don't end up using r0, r4, r5, we need
-	 * to mark them as clobber so that LLVM doesn't end up using them
-	 * before / after the call.
-	 */
-	asm volatile("r1 = %[ctx]\n\t"
-		     "r2 = %[map]\n\t"
-		     "r3 = %[slot]\n\t"
-		     "call 12"
-		     :: [ctx]"r"(ctx), [map]"r"(map), [slot]"i"(slot)
-		     : "r0", "r1", "r2", "r3", "r4", "r5");
-}
-#endif
+struct bpf_map_def {
+	unsigned int type;
+	unsigned int key_size;
+	unsigned int value_size;
+	unsigned int max_entries;
+	unsigned int map_flags;
+};
 
 enum libbpf_pin_type {
 	LIBBPF_PIN_NONE,
@@ -173,117 +75,5 @@ enum libbpf_tristate {
 };
 
 #define __kconfig __attribute__((section(".kconfig")))
-#define __ksym __attribute__((section(".ksyms")))
-#define __kptr __attribute__((btf_type_tag("kptr")))
-#define __kptr_ref __attribute__((btf_type_tag("kptr_ref")))
-
-#ifndef ___bpf_concat
-#define ___bpf_concat(a, b) a ## b
-#endif
-#ifndef ___bpf_apply
-#define ___bpf_apply(fn, n) ___bpf_concat(fn, n)
-#endif
-#ifndef ___bpf_nth
-#define ___bpf_nth(_, _1, _2, _3, _4, _5, _6, _7, _8, _9, _a, _b, _c, N, ...) N
-#endif
-#ifndef ___bpf_narg
-#define ___bpf_narg(...) \
-	___bpf_nth(_, ##__VA_ARGS__, 12, 11, 10, 9, 8, 7, 6, 5, 4, 3, 2, 1, 0)
-#endif
-
-#define ___bpf_fill0(arr, p, x) do {} while (0)
-#define ___bpf_fill1(arr, p, x) arr[p] = x
-#define ___bpf_fill2(arr, p, x, args...) arr[p] = x; ___bpf_fill1(arr, p + 1, args)
-#define ___bpf_fill3(arr, p, x, args...) arr[p] = x; ___bpf_fill2(arr, p + 1, args)
-#define ___bpf_fill4(arr, p, x, args...) arr[p] = x; ___bpf_fill3(arr, p + 1, args)
-#define ___bpf_fill5(arr, p, x, args...) arr[p] = x; ___bpf_fill4(arr, p + 1, args)
-#define ___bpf_fill6(arr, p, x, args...) arr[p] = x; ___bpf_fill5(arr, p + 1, args)
-#define ___bpf_fill7(arr, p, x, args...) arr[p] = x; ___bpf_fill6(arr, p + 1, args)
-#define ___bpf_fill8(arr, p, x, args...) arr[p] = x; ___bpf_fill7(arr, p + 1, args)
-#define ___bpf_fill9(arr, p, x, args...) arr[p] = x; ___bpf_fill8(arr, p + 1, args)
-#define ___bpf_fill10(arr, p, x, args...) arr[p] = x; ___bpf_fill9(arr, p + 1, args)
-#define ___bpf_fill11(arr, p, x, args...) arr[p] = x; ___bpf_fill10(arr, p + 1, args)
-#define ___bpf_fill12(arr, p, x, args...) arr[p] = x; ___bpf_fill11(arr, p + 1, args)
-#define ___bpf_fill(arr, args...) \
-	___bpf_apply(___bpf_fill, ___bpf_narg(args))(arr, 0, args)
-
-/*
- * BPF_SEQ_PRINTF to wrap bpf_seq_printf to-be-printed values
- * in a structure.
- */
-#define BPF_SEQ_PRINTF(seq, fmt, args...)			\
-({								\
-	static const char ___fmt[] = fmt;			\
-	unsigned long long ___param[___bpf_narg(args)];		\
-								\
-	_Pragma("GCC diagnostic push")				\
-	_Pragma("GCC diagnostic ignored \"-Wint-conversion\"")	\
-	___bpf_fill(___param, args);				\
-	_Pragma("GCC diagnostic pop")				\
-								\
-	bpf_seq_printf(seq, ___fmt, sizeof(___fmt),		\
-		       ___param, sizeof(___param));		\
-})
-
-/*
- * BPF_SNPRINTF wraps the bpf_snprintf helper with variadic arguments instead of
- * an array of u64.
- */
-#define BPF_SNPRINTF(out, out_size, fmt, args...)		\
-({								\
-	static const char ___fmt[] = fmt;			\
-	unsigned long long ___param[___bpf_narg(args)];		\
-								\
-	_Pragma("GCC diagnostic push")				\
-	_Pragma("GCC diagnostic ignored \"-Wint-conversion\"")	\
-	___bpf_fill(___param, args);				\
-	_Pragma("GCC diagnostic pop")				\
-								\
-	bpf_snprintf(out, out_size, ___fmt,			\
-		     ___param, sizeof(___param));		\
-})
-
-#ifdef BPF_NO_GLOBAL_DATA
-#define BPF_PRINTK_FMT_MOD
-#else
-#define BPF_PRINTK_FMT_MOD static const
-#endif
-
-#define __bpf_printk(fmt, ...)				\
-({							\
-	BPF_PRINTK_FMT_MOD char ____fmt[] = fmt;	\
-	bpf_trace_printk(____fmt, sizeof(____fmt),	\
-			 ##__VA_ARGS__);		\
-})
-
-/*
- * __bpf_vprintk wraps the bpf_trace_vprintk helper with variadic arguments
- * instead of an array of u64.
- */
-#define __bpf_vprintk(fmt, args...)				\
-({								\
-	static const char ___fmt[] = fmt;			\
-	unsigned long long ___param[___bpf_narg(args)];		\
-								\
-	_Pragma("GCC diagnostic push")				\
-	_Pragma("GCC diagnostic ignored \"-Wint-conversion\"")	\
-	___bpf_fill(___param, args);				\
-	_Pragma("GCC diagnostic pop")				\
-								\
-	bpf_trace_vprintk(___fmt, sizeof(___fmt),		\
-			  ___param, sizeof(___param));		\
-})
-
-/* Use __bpf_printk when bpf_printk call has 3 or fewer fmt args
- * Otherwise use __bpf_vprintk
- */
-#define ___bpf_pick_printk(...) \
-	___bpf_nth(_, ##__VA_ARGS__, __bpf_vprintk, __bpf_vprintk, __bpf_vprintk,	\
-		   __bpf_vprintk, __bpf_vprintk, __bpf_vprintk, __bpf_vprintk,		\
-		   __bpf_vprintk, __bpf_vprintk, __bpf_printk /*3*/, __bpf_printk /*2*/,\
-		   __bpf_printk /*1*/, __bpf_printk /*0*/)
-
-/* Helper macro to print out debug messages */
-#define bpf_printk(fmt, args...) ___bpf_pick_printk(args)(fmt, ##args)
 
 #endif

src/bpf_prog_linfo.c

@@ -8,6 +8,9 @@
 #include "libbpf.h"
 #include "libbpf_internal.h"
 
+/* make sure libbpf doesn't use kernel-only integer typedefs */
+#pragma GCC poison u8 u16 u32 u64 s8 s16 s32 s64
+
 struct bpf_prog_linfo {
 	void *raw_linfo;
 	void *raw_jited_linfo;
@@ -106,7 +109,7 @@ struct bpf_prog_linfo *bpf_prog_linfo__new(const struct bpf_prog_info *info)
 	nr_linfo = info->nr_line_info;
 
 	if (!nr_linfo)
-		return errno = EINVAL, NULL;
+		return NULL;
 
 	/*
 	 * The min size that bpf_prog_linfo has to access for
@@ -114,11 +117,11 @@ struct bpf_prog_linfo *bpf_prog_linfo__new(const struct bpf_prog_info *info)
 	 */
 	if (info->line_info_rec_size <
 	    offsetof(struct bpf_line_info, file_name_off))
-		return errno = EINVAL, NULL;
+		return NULL;
 
 	prog_linfo = calloc(1, sizeof(*prog_linfo));
 	if (!prog_linfo)
-		return errno = ENOMEM, NULL;
+		return NULL;
 
 	/* Copy xlated line_info */
 	prog_linfo->nr_linfo = nr_linfo;
@@ -174,7 +177,7 @@ struct bpf_prog_linfo *bpf_prog_linfo__new(const struct bpf_prog_info *info)
 
 err_free:
 	bpf_prog_linfo__free(prog_linfo);
-	return errno = EINVAL, NULL;
+	return NULL;
 }
 
 const struct bpf_line_info *
@@ -186,11 +189,11 @@ bpf_prog_linfo__lfind_addr_func(const struct bpf_prog_linfo *prog_linfo,
 	const __u64 *jited_linfo;
 
 	if (func_idx >= prog_linfo->nr_jited_func)
-		return errno = ENOENT, NULL;
+		return NULL;
 
 	nr_linfo = prog_linfo->nr_jited_linfo_per_func[func_idx];
 	if (nr_skip >= nr_linfo)
-		return errno = ENOENT, NULL;
+		return NULL;
 
 	start = prog_linfo->jited_linfo_func_idx[func_idx] + nr_skip;
 	jited_rec_size = prog_linfo->jited_rec_size;
@@ -198,7 +201,7 @@ bpf_prog_linfo__lfind_addr_func(const struct bpf_prog_linfo *prog_linfo,
 		(start * jited_rec_size);
 	jited_linfo = raw_jited_linfo;
 	if (addr < *jited_linfo)
-		return errno = ENOENT, NULL;
+		return NULL;
 
 	nr_linfo -= nr_skip;
 	rec_size = prog_linfo->rec_size;
@@ -225,13 +228,13 @@ bpf_prog_linfo__lfind(const struct bpf_prog_linfo *prog_linfo,
 
 	nr_linfo = prog_linfo->nr_linfo;
 	if (nr_skip >= nr_linfo)
-		return errno = ENOENT, NULL;
+		return NULL;
 
 	rec_size = prog_linfo->rec_size;
 	raw_linfo = prog_linfo->raw_linfo + (nr_skip * rec_size);
 	linfo = raw_linfo;
 	if (insn_off < linfo->insn_off)
-		return errno = ENOENT, NULL;
+		return NULL;
 
 	nr_linfo -= nr_skip;
 	for (i = 0; i < nr_linfo; i++) {

src/bpf_tracing.h

@@ -2,8 +2,6 @@
 #ifndef __BPF_TRACING_H__
 #define __BPF_TRACING_H__
 
-#include <bpf/bpf_helpers.h>
-
 /* Scan the ARCH passed in from ARCH env variable (see Makefile) */
 #if defined(__TARGET_ARCH_x86)
 	#define bpf_target_x86
@@ -26,388 +24,300 @@
 #elif defined(__TARGET_ARCH_sparc)
 	#define bpf_target_sparc
 	#define bpf_target_defined
-#elif defined(__TARGET_ARCH_riscv)
-	#define bpf_target_riscv
-	#define bpf_target_defined
-#elif defined(__TARGET_ARCH_arc)
-	#define bpf_target_arc
-	#define bpf_target_defined
 #else
-
-/* Fall back to what the compiler says */
-#if defined(__x86_64__)
-	#define bpf_target_x86
-	#define bpf_target_defined
-#elif defined(__s390__)
-	#define bpf_target_s390
-	#define bpf_target_defined
-#elif defined(__arm__)
-	#define bpf_target_arm
-	#define bpf_target_defined
-#elif defined(__aarch64__)
-	#define bpf_target_arm64
-	#define bpf_target_defined
-#elif defined(__mips__)
-	#define bpf_target_mips
-	#define bpf_target_defined
-#elif defined(__powerpc__)
-	#define bpf_target_powerpc
-	#define bpf_target_defined
-#elif defined(__sparc__)
-	#define bpf_target_sparc
-	#define bpf_target_defined
-#elif defined(__riscv) && __riscv_xlen == 64
-	#define bpf_target_riscv
-	#define bpf_target_defined
-#elif defined(__arc__)
-	#define bpf_target_arc
-	#define bpf_target_defined
-#endif /* no compiler target */
-
+	#undef bpf_target_defined
 #endif
 
-#ifndef __BPF_TARGET_MISSING
-#define __BPF_TARGET_MISSING "GCC error \"Must specify a BPF target arch via __TARGET_ARCH_xxx\""
+/* Fall back to what the compiler says */
+#ifndef bpf_target_defined
+#if defined(__x86_64__)
+	#define bpf_target_x86
+#elif defined(__s390__)
+	#define bpf_target_s390
+#elif defined(__arm__)
+	#define bpf_target_arm
+#elif defined(__aarch64__)
+	#define bpf_target_arm64
+#elif defined(__mips__)
+	#define bpf_target_mips
+#elif defined(__powerpc__)
+	#define bpf_target_powerpc
+#elif defined(__sparc__)
+	#define bpf_target_sparc
+#endif
 #endif
 
 #if defined(bpf_target_x86)
 
 #if defined(__KERNEL__) || defined(__VMLINUX_H__)
 
-#define __PT_PARM1_REG di
-#define __PT_PARM2_REG si
-#define __PT_PARM3_REG dx
-#define __PT_PARM4_REG cx
-#define __PT_PARM5_REG r8
-#define __PT_RET_REG sp
-#define __PT_FP_REG bp
-#define __PT_RC_REG ax
-#define __PT_SP_REG sp
-#define __PT_IP_REG ip
-/* syscall uses r10 for PARM4 */
-#define PT_REGS_PARM4_SYSCALL(x) ((x)->r10)
-#define PT_REGS_PARM4_CORE_SYSCALL(x) BPF_CORE_READ(x, r10)
+#define PT_REGS_PARM1(x) ((x)->di)
+#define PT_REGS_PARM2(x) ((x)->si)
+#define PT_REGS_PARM3(x) ((x)->dx)
+#define PT_REGS_PARM4(x) ((x)->cx)
+#define PT_REGS_PARM5(x) ((x)->r8)
+#define PT_REGS_RET(x) ((x)->sp)
+#define PT_REGS_FP(x) ((x)->bp)
+#define PT_REGS_RC(x) ((x)->ax)
+#define PT_REGS_SP(x) ((x)->sp)
+#define PT_REGS_IP(x) ((x)->ip)
+
+#define PT_REGS_PARM1_CORE(x) BPF_CORE_READ((x), di)
+#define PT_REGS_PARM2_CORE(x) BPF_CORE_READ((x), si)
+#define PT_REGS_PARM3_CORE(x) BPF_CORE_READ((x), dx)
+#define PT_REGS_PARM4_CORE(x) BPF_CORE_READ((x), cx)
+#define PT_REGS_PARM5_CORE(x) BPF_CORE_READ((x), r8)
+#define PT_REGS_RET_CORE(x) BPF_CORE_READ((x), sp)
+#define PT_REGS_FP_CORE(x) BPF_CORE_READ((x), bp)
+#define PT_REGS_RC_CORE(x) BPF_CORE_READ((x), ax)
+#define PT_REGS_SP_CORE(x) BPF_CORE_READ((x), sp)
+#define PT_REGS_IP_CORE(x) BPF_CORE_READ((x), ip)
 
 #else
 
 #ifdef __i386__
-
-#define __PT_PARM1_REG eax
-#define __PT_PARM2_REG edx
-#define __PT_PARM3_REG ecx
 /* i386 kernel is built with -mregparm=3 */
-#define __PT_PARM4_REG __unsupported__
-#define __PT_PARM5_REG __unsupported__
-#define __PT_RET_REG esp
-#define __PT_FP_REG ebp
-#define __PT_RC_REG eax
-#define __PT_SP_REG esp
-#define __PT_IP_REG eip
+#define PT_REGS_PARM1(x) ((x)->eax)
+#define PT_REGS_PARM2(x) ((x)->edx)
+#define PT_REGS_PARM3(x) ((x)->ecx)
+#define PT_REGS_PARM4(x) 0
+#define PT_REGS_PARM5(x) 0
+#define PT_REGS_RET(x) ((x)->esp)
+#define PT_REGS_FP(x) ((x)->ebp)
+#define PT_REGS_RC(x) ((x)->eax)
+#define PT_REGS_SP(x) ((x)->esp)
+#define PT_REGS_IP(x) ((x)->eip)
 
-#else /* __i386__ */
+#define PT_REGS_PARM1_CORE(x) BPF_CORE_READ((x), eax)
+#define PT_REGS_PARM2_CORE(x) BPF_CORE_READ((x), edx)
+#define PT_REGS_PARM3_CORE(x) BPF_CORE_READ((x), ecx)
+#define PT_REGS_PARM4_CORE(x) 0
+#define PT_REGS_PARM5_CORE(x) 0
+#define PT_REGS_RET_CORE(x) BPF_CORE_READ((x), esp)
+#define PT_REGS_FP_CORE(x) BPF_CORE_READ((x), ebp)
+#define PT_REGS_RC_CORE(x) BPF_CORE_READ((x), eax)
+#define PT_REGS_SP_CORE(x) BPF_CORE_READ((x), esp)
+#define PT_REGS_IP_CORE(x) BPF_CORE_READ((x), eip)
 
-#define __PT_PARM1_REG rdi
-#define __PT_PARM2_REG rsi
-#define __PT_PARM3_REG rdx
-#define __PT_PARM4_REG rcx
-#define __PT_PARM5_REG r8
-#define __PT_RET_REG rsp
-#define __PT_FP_REG rbp
-#define __PT_RC_REG rax
-#define __PT_SP_REG rsp
-#define __PT_IP_REG rip
-/* syscall uses r10 for PARM4 */
-#define PT_REGS_PARM4_SYSCALL(x) ((x)->r10)
-#define PT_REGS_PARM4_CORE_SYSCALL(x) BPF_CORE_READ(x, r10)
+#else
 
-#endif /* __i386__ */
+#define PT_REGS_PARM1(x) ((x)->rdi)
+#define PT_REGS_PARM2(x) ((x)->rsi)
+#define PT_REGS_PARM3(x) ((x)->rdx)
+#define PT_REGS_PARM4(x) ((x)->rcx)
+#define PT_REGS_PARM5(x) ((x)->r8)
+#define PT_REGS_RET(x) ((x)->rsp)
+#define PT_REGS_FP(x) ((x)->rbp)
+#define PT_REGS_RC(x) ((x)->rax)
+#define PT_REGS_SP(x) ((x)->rsp)
+#define PT_REGS_IP(x) ((x)->rip)
 
-#endif /* __KERNEL__ || __VMLINUX_H__ */
+#define PT_REGS_PARM1_CORE(x) BPF_CORE_READ((x), rdi)
+#define PT_REGS_PARM2_CORE(x) BPF_CORE_READ((x), rsi)
+#define PT_REGS_PARM3_CORE(x) BPF_CORE_READ((x), rdx)
+#define PT_REGS_PARM4_CORE(x) BPF_CORE_READ((x), rcx)
+#define PT_REGS_PARM5_CORE(x) BPF_CORE_READ((x), r8)
+#define PT_REGS_RET_CORE(x) BPF_CORE_READ((x), rsp)
+#define PT_REGS_FP_CORE(x) BPF_CORE_READ((x), rbp)
+#define PT_REGS_RC_CORE(x) BPF_CORE_READ((x), rax)
+#define PT_REGS_SP_CORE(x) BPF_CORE_READ((x), rsp)
+#define PT_REGS_IP_CORE(x) BPF_CORE_READ((x), rip)
+
+#endif
+#endif
 
 #elif defined(bpf_target_s390)
 
-struct pt_regs___s390 {
-	unsigned long orig_gpr2;
-};
-
 /* s390 provides user_pt_regs instead of struct pt_regs to userspace */
-#define __PT_REGS_CAST(x) ((const user_pt_regs *)(x))
-#define __PT_PARM1_REG gprs[2]
-#define __PT_PARM2_REG gprs[3]
-#define __PT_PARM3_REG gprs[4]
-#define __PT_PARM4_REG gprs[5]
-#define __PT_PARM5_REG gprs[6]
-#define __PT_RET_REG grps[14]
-#define __PT_FP_REG gprs[11]	/* Works only with CONFIG_FRAME_POINTER */
-#define __PT_RC_REG gprs[2]
-#define __PT_SP_REG gprs[15]
-#define __PT_IP_REG psw.addr
-#define PT_REGS_PARM1_SYSCALL(x) PT_REGS_PARM1_CORE_SYSCALL(x)
-#define PT_REGS_PARM1_CORE_SYSCALL(x) BPF_CORE_READ((const struct pt_regs___s390 *)(x), orig_gpr2)
+struct pt_regs;
+#define PT_REGS_S390 const volatile user_pt_regs
+#define PT_REGS_PARM1(x) (((PT_REGS_S390 *)(x))->gprs[2])
+#define PT_REGS_PARM2(x) (((PT_REGS_S390 *)(x))->gprs[3])
+#define PT_REGS_PARM3(x) (((PT_REGS_S390 *)(x))->gprs[4])
+#define PT_REGS_PARM4(x) (((PT_REGS_S390 *)(x))->gprs[5])
+#define PT_REGS_PARM5(x) (((PT_REGS_S390 *)(x))->gprs[6])
+#define PT_REGS_RET(x) (((PT_REGS_S390 *)(x))->gprs[14])
+/* Works only with CONFIG_FRAME_POINTER */
+#define PT_REGS_FP(x) (((PT_REGS_S390 *)(x))->gprs[11])
+#define PT_REGS_RC(x) (((PT_REGS_S390 *)(x))->gprs[2])
+#define PT_REGS_SP(x) (((PT_REGS_S390 *)(x))->gprs[15])
+#define PT_REGS_IP(x) (((PT_REGS_S390 *)(x))->psw.addr)
+
+#define PT_REGS_PARM1_CORE(x) BPF_CORE_READ((PT_REGS_S390 *)(x), gprs[2])
+#define PT_REGS_PARM2_CORE(x) BPF_CORE_READ((PT_REGS_S390 *)(x), gprs[3])
+#define PT_REGS_PARM3_CORE(x) BPF_CORE_READ((PT_REGS_S390 *)(x), gprs[4])
+#define PT_REGS_PARM4_CORE(x) BPF_CORE_READ((PT_REGS_S390 *)(x), gprs[5])
+#define PT_REGS_PARM5_CORE(x) BPF_CORE_READ((PT_REGS_S390 *)(x), gprs[6])
+#define PT_REGS_RET_CORE(x) BPF_CORE_READ((PT_REGS_S390 *)(x), gprs[14])
+#define PT_REGS_FP_CORE(x) BPF_CORE_READ((PT_REGS_S390 *)(x), gprs[11])
+#define PT_REGS_RC_CORE(x) BPF_CORE_READ((PT_REGS_S390 *)(x), gprs[2])
+#define PT_REGS_SP_CORE(x) BPF_CORE_READ((PT_REGS_S390 *)(x), gprs[15])
+#define PT_REGS_IP_CORE(x) BPF_CORE_READ((PT_REGS_S390 *)(x), psw.addr)
 
 #elif defined(bpf_target_arm)
 
-#define __PT_PARM1_REG uregs[0]
-#define __PT_PARM2_REG uregs[1]
-#define __PT_PARM3_REG uregs[2]
-#define __PT_PARM4_REG uregs[3]
-#define __PT_PARM5_REG uregs[4]
-#define __PT_RET_REG uregs[14]
-#define __PT_FP_REG uregs[11]	/* Works only with CONFIG_FRAME_POINTER */
-#define __PT_RC_REG uregs[0]
-#define __PT_SP_REG uregs[13]
-#define __PT_IP_REG uregs[12]
+#define PT_REGS_PARM1(x) ((x)->uregs[0])
+#define PT_REGS_PARM2(x) ((x)->uregs[1])
+#define PT_REGS_PARM3(x) ((x)->uregs[2])
+#define PT_REGS_PARM4(x) ((x)->uregs[3])
+#define PT_REGS_PARM5(x) ((x)->uregs[4])
+#define PT_REGS_RET(x) ((x)->uregs[14])
+#define PT_REGS_FP(x) ((x)->uregs[11]) /* Works only with CONFIG_FRAME_POINTER */
+#define PT_REGS_RC(x) ((x)->uregs[0])
+#define PT_REGS_SP(x) ((x)->uregs[13])
+#define PT_REGS_IP(x) ((x)->uregs[12])
+
+#define PT_REGS_PARM1_CORE(x) BPF_CORE_READ((x), uregs[0])
+#define PT_REGS_PARM2_CORE(x) BPF_CORE_READ((x), uregs[1])
+#define PT_REGS_PARM3_CORE(x) BPF_CORE_READ((x), uregs[2])
+#define PT_REGS_PARM4_CORE(x) BPF_CORE_READ((x), uregs[3])
+#define PT_REGS_PARM5_CORE(x) BPF_CORE_READ((x), uregs[4])
+#define PT_REGS_RET_CORE(x) BPF_CORE_READ((x), uregs[14])
+#define PT_REGS_FP_CORE(x) BPF_CORE_READ((x), uregs[11])
+#define PT_REGS_RC_CORE(x) BPF_CORE_READ((x), uregs[0])
+#define PT_REGS_SP_CORE(x) BPF_CORE_READ((x), uregs[13])
+#define PT_REGS_IP_CORE(x) BPF_CORE_READ((x), uregs[12])
 
 #elif defined(bpf_target_arm64)
 
-struct pt_regs___arm64 {
-	unsigned long orig_x0;
-};
-
 /* arm64 provides struct user_pt_regs instead of struct pt_regs to userspace */
-#define __PT_REGS_CAST(x) ((const struct user_pt_regs *)(x))
-#define __PT_PARM1_REG regs[0]
-#define __PT_PARM2_REG regs[1]
-#define __PT_PARM3_REG regs[2]
-#define __PT_PARM4_REG regs[3]
-#define __PT_PARM5_REG regs[4]
-#define __PT_RET_REG regs[30]
-#define __PT_FP_REG regs[29]	/* Works only with CONFIG_FRAME_POINTER */
-#define __PT_RC_REG regs[0]
-#define __PT_SP_REG sp
-#define __PT_IP_REG pc
-#define PT_REGS_PARM1_SYSCALL(x) PT_REGS_PARM1_CORE_SYSCALL(x)
-#define PT_REGS_PARM1_CORE_SYSCALL(x) BPF_CORE_READ((const struct pt_regs___arm64 *)(x), orig_x0)
+struct pt_regs;
+#define PT_REGS_ARM64 const volatile struct user_pt_regs
+#define PT_REGS_PARM1(x) (((PT_REGS_ARM64 *)(x))->regs[0])
+#define PT_REGS_PARM2(x) (((PT_REGS_ARM64 *)(x))->regs[1])
+#define PT_REGS_PARM3(x) (((PT_REGS_ARM64 *)(x))->regs[2])
+#define PT_REGS_PARM4(x) (((PT_REGS_ARM64 *)(x))->regs[3])
+#define PT_REGS_PARM5(x) (((PT_REGS_ARM64 *)(x))->regs[4])
+#define PT_REGS_RET(x) (((PT_REGS_ARM64 *)(x))->regs[30])
+/* Works only with CONFIG_FRAME_POINTER */
+#define PT_REGS_FP(x) (((PT_REGS_ARM64 *)(x))->regs[29])
+#define PT_REGS_RC(x) (((PT_REGS_ARM64 *)(x))->regs[0])
+#define PT_REGS_SP(x) (((PT_REGS_ARM64 *)(x))->sp)
+#define PT_REGS_IP(x) (((PT_REGS_ARM64 *)(x))->pc)
+
+#define PT_REGS_PARM1_CORE(x) BPF_CORE_READ((PT_REGS_ARM64 *)(x), regs[0])
+#define PT_REGS_PARM2_CORE(x) BPF_CORE_READ((PT_REGS_ARM64 *)(x), regs[1])
+#define PT_REGS_PARM3_CORE(x) BPF_CORE_READ((PT_REGS_ARM64 *)(x), regs[2])
+#define PT_REGS_PARM4_CORE(x) BPF_CORE_READ((PT_REGS_ARM64 *)(x), regs[3])
+#define PT_REGS_PARM5_CORE(x) BPF_CORE_READ((PT_REGS_ARM64 *)(x), regs[4])
+#define PT_REGS_RET_CORE(x) BPF_CORE_READ((PT_REGS_ARM64 *)(x), regs[30])
+#define PT_REGS_FP_CORE(x) BPF_CORE_READ((PT_REGS_ARM64 *)(x), regs[29])
+#define PT_REGS_RC_CORE(x) BPF_CORE_READ((PT_REGS_ARM64 *)(x), regs[0])
+#define PT_REGS_SP_CORE(x) BPF_CORE_READ((PT_REGS_ARM64 *)(x), sp)
+#define PT_REGS_IP_CORE(x) BPF_CORE_READ((PT_REGS_ARM64 *)(x), pc)
 
 #elif defined(bpf_target_mips)
 
-#define __PT_PARM1_REG regs[4]
-#define __PT_PARM2_REG regs[5]
-#define __PT_PARM3_REG regs[6]
-#define __PT_PARM4_REG regs[7]
-#define __PT_PARM5_REG regs[8]
-#define __PT_RET_REG regs[31]
-#define __PT_FP_REG regs[30]	/* Works only with CONFIG_FRAME_POINTER */
-#define __PT_RC_REG regs[2]
-#define __PT_SP_REG regs[29]
-#define __PT_IP_REG cp0_epc
+#define PT_REGS_PARM1(x) ((x)->regs[4])
+#define PT_REGS_PARM2(x) ((x)->regs[5])
+#define PT_REGS_PARM3(x) ((x)->regs[6])
+#define PT_REGS_PARM4(x) ((x)->regs[7])
+#define PT_REGS_PARM5(x) ((x)->regs[8])
+#define PT_REGS_RET(x) ((x)->regs[31])
+#define PT_REGS_FP(x) ((x)->regs[30]) /* Works only with CONFIG_FRAME_POINTER */
+#define PT_REGS_RC(x) ((x)->regs[1])
+#define PT_REGS_SP(x) ((x)->regs[29])
+#define PT_REGS_IP(x) ((x)->cp0_epc)
+
+#define PT_REGS_PARM1_CORE(x) BPF_CORE_READ((x), regs[4])
+#define PT_REGS_PARM2_CORE(x) BPF_CORE_READ((x), regs[5])
+#define PT_REGS_PARM3_CORE(x) BPF_CORE_READ((x), regs[6])
+#define PT_REGS_PARM4_CORE(x) BPF_CORE_READ((x), regs[7])
+#define PT_REGS_PARM5_CORE(x) BPF_CORE_READ((x), regs[8])
+#define PT_REGS_RET_CORE(x) BPF_CORE_READ((x), regs[31])
+#define PT_REGS_FP_CORE(x) BPF_CORE_READ((x), regs[30])
+#define PT_REGS_RC_CORE(x) BPF_CORE_READ((x), regs[1])
+#define PT_REGS_SP_CORE(x) BPF_CORE_READ((x), regs[29])
+#define PT_REGS_IP_CORE(x) BPF_CORE_READ((x), cp0_epc)
 
 #elif defined(bpf_target_powerpc)
 
-#define __PT_PARM1_REG gpr[3]
-#define __PT_PARM2_REG gpr[4]
-#define __PT_PARM3_REG gpr[5]
-#define __PT_PARM4_REG gpr[6]
-#define __PT_PARM5_REG gpr[7]
-#define __PT_RET_REG regs[31]
-#define __PT_FP_REG __unsupported__
-#define __PT_RC_REG gpr[3]
-#define __PT_SP_REG sp
-#define __PT_IP_REG nip
-/* powerpc does not select ARCH_HAS_SYSCALL_WRAPPER. */
-#define PT_REGS_SYSCALL_REGS(ctx) ctx
+#define PT_REGS_PARM1(x) ((x)->gpr[3])
+#define PT_REGS_PARM2(x) ((x)->gpr[4])
+#define PT_REGS_PARM3(x) ((x)->gpr[5])
+#define PT_REGS_PARM4(x) ((x)->gpr[6])
+#define PT_REGS_PARM5(x) ((x)->gpr[7])
+#define PT_REGS_RC(x) ((x)->gpr[3])
+#define PT_REGS_SP(x) ((x)->sp)
+#define PT_REGS_IP(x) ((x)->nip)
+
+#define PT_REGS_PARM1_CORE(x) BPF_CORE_READ((x), gpr[3])
+#define PT_REGS_PARM2_CORE(x) BPF_CORE_READ((x), gpr[4])
+#define PT_REGS_PARM3_CORE(x) BPF_CORE_READ((x), gpr[5])
+#define PT_REGS_PARM4_CORE(x) BPF_CORE_READ((x), gpr[6])
+#define PT_REGS_PARM5_CORE(x) BPF_CORE_READ((x), gpr[7])
+#define PT_REGS_RC_CORE(x) BPF_CORE_READ((x), gpr[3])
+#define PT_REGS_SP_CORE(x) BPF_CORE_READ((x), sp)
+#define PT_REGS_IP_CORE(x) BPF_CORE_READ((x), nip)
 
 #elif defined(bpf_target_sparc)
 
-#define __PT_PARM1_REG u_regs[UREG_I0]
-#define __PT_PARM2_REG u_regs[UREG_I1]
-#define __PT_PARM3_REG u_regs[UREG_I2]
-#define __PT_PARM4_REG u_regs[UREG_I3]
-#define __PT_PARM5_REG u_regs[UREG_I4]
-#define __PT_RET_REG u_regs[UREG_I7]
-#define __PT_FP_REG __unsupported__
-#define __PT_RC_REG u_regs[UREG_I0]
-#define __PT_SP_REG u_regs[UREG_FP]
+#define PT_REGS_PARM1(x) ((x)->u_regs[UREG_I0])
+#define PT_REGS_PARM2(x) ((x)->u_regs[UREG_I1])
+#define PT_REGS_PARM3(x) ((x)->u_regs[UREG_I2])
+#define PT_REGS_PARM4(x) ((x)->u_regs[UREG_I3])
+#define PT_REGS_PARM5(x) ((x)->u_regs[UREG_I4])
+#define PT_REGS_RET(x) ((x)->u_regs[UREG_I7])
+#define PT_REGS_RC(x) ((x)->u_regs[UREG_I0])
+#define PT_REGS_SP(x) ((x)->u_regs[UREG_FP])
+
+#define PT_REGS_PARM1_CORE(x) BPF_CORE_READ((x), u_regs[UREG_I0])
+#define PT_REGS_PARM2_CORE(x) BPF_CORE_READ((x), u_regs[UREG_I1])
+#define PT_REGS_PARM3_CORE(x) BPF_CORE_READ((x), u_regs[UREG_I2])
+#define PT_REGS_PARM4_CORE(x) BPF_CORE_READ((x), u_regs[UREG_I3])
+#define PT_REGS_PARM5_CORE(x) BPF_CORE_READ((x), u_regs[UREG_I4])
+#define PT_REGS_RET_CORE(x) BPF_CORE_READ((x), u_regs[UREG_I7])
+#define PT_REGS_RC_CORE(x) BPF_CORE_READ((x), u_regs[UREG_I0])
+#define PT_REGS_SP_CORE(x) BPF_CORE_READ((x), u_regs[UREG_FP])
+
 /* Should this also be a bpf_target check for the sparc case? */
 #if defined(__arch64__)
-#define __PT_IP_REG tpc
+#define PT_REGS_IP(x) ((x)->tpc)
+#define PT_REGS_IP_CORE(x) BPF_CORE_READ((x), tpc)
 #else
-#define __PT_IP_REG pc
+#define PT_REGS_IP(x) ((x)->pc)
+#define PT_REGS_IP_CORE(x) BPF_CORE_READ((x), pc)
 #endif
 
-#elif defined(bpf_target_riscv)
-
-#define __PT_REGS_CAST(x) ((const struct user_regs_struct *)(x))
-#define __PT_PARM1_REG a0
-#define __PT_PARM2_REG a1
-#define __PT_PARM3_REG a2
-#define __PT_PARM4_REG a3
-#define __PT_PARM5_REG a4
-#define __PT_RET_REG ra
-#define __PT_FP_REG s0
-#define __PT_RC_REG a0
-#define __PT_SP_REG sp
-#define __PT_IP_REG pc
-/* riscv does not select ARCH_HAS_SYSCALL_WRAPPER. */
-#define PT_REGS_SYSCALL_REGS(ctx) ctx
-
-#elif defined(bpf_target_arc)
-
-/* arc provides struct user_pt_regs instead of struct pt_regs to userspace */
-#define __PT_REGS_CAST(x) ((const struct user_regs_struct *)(x))
-#define __PT_PARM1_REG scratch.r0
-#define __PT_PARM2_REG scratch.r1
-#define __PT_PARM3_REG scratch.r2
-#define __PT_PARM4_REG scratch.r3
-#define __PT_PARM5_REG scratch.r4
-#define __PT_RET_REG scratch.blink
-#define __PT_FP_REG __unsupported__
-#define __PT_RC_REG scratch.r0
-#define __PT_SP_REG scratch.sp
-#define __PT_IP_REG scratch.ret
-/* arc does not select ARCH_HAS_SYSCALL_WRAPPER. */
-#define PT_REGS_SYSCALL_REGS(ctx) ctx
-
 #endif
 
-#if defined(bpf_target_defined)
-
-struct pt_regs;
-
-/* allow some architecutres to override `struct pt_regs` */
-#ifndef __PT_REGS_CAST
-#define __PT_REGS_CAST(x) (x)
-#endif
-
-#define PT_REGS_PARM1(x) (__PT_REGS_CAST(x)->__PT_PARM1_REG)
-#define PT_REGS_PARM2(x) (__PT_REGS_CAST(x)->__PT_PARM2_REG)
-#define PT_REGS_PARM3(x) (__PT_REGS_CAST(x)->__PT_PARM3_REG)
-#define PT_REGS_PARM4(x) (__PT_REGS_CAST(x)->__PT_PARM4_REG)
-#define PT_REGS_PARM5(x) (__PT_REGS_CAST(x)->__PT_PARM5_REG)
-#define PT_REGS_RET(x) (__PT_REGS_CAST(x)->__PT_RET_REG)
-#define PT_REGS_FP(x) (__PT_REGS_CAST(x)->__PT_FP_REG)
-#define PT_REGS_RC(x) (__PT_REGS_CAST(x)->__PT_RC_REG)
-#define PT_REGS_SP(x) (__PT_REGS_CAST(x)->__PT_SP_REG)
-#define PT_REGS_IP(x) (__PT_REGS_CAST(x)->__PT_IP_REG)
-
-#define PT_REGS_PARM1_CORE(x) BPF_CORE_READ(__PT_REGS_CAST(x), __PT_PARM1_REG)
-#define PT_REGS_PARM2_CORE(x) BPF_CORE_READ(__PT_REGS_CAST(x), __PT_PARM2_REG)
-#define PT_REGS_PARM3_CORE(x) BPF_CORE_READ(__PT_REGS_CAST(x), __PT_PARM3_REG)
-#define PT_REGS_PARM4_CORE(x) BPF_CORE_READ(__PT_REGS_CAST(x), __PT_PARM4_REG)
-#define PT_REGS_PARM5_CORE(x) BPF_CORE_READ(__PT_REGS_CAST(x), __PT_PARM5_REG)
-#define PT_REGS_RET_CORE(x) BPF_CORE_READ(__PT_REGS_CAST(x), __PT_RET_REG)
-#define PT_REGS_FP_CORE(x) BPF_CORE_READ(__PT_REGS_CAST(x), __PT_FP_REG)
-#define PT_REGS_RC_CORE(x) BPF_CORE_READ(__PT_REGS_CAST(x), __PT_RC_REG)
-#define PT_REGS_SP_CORE(x) BPF_CORE_READ(__PT_REGS_CAST(x), __PT_SP_REG)
-#define PT_REGS_IP_CORE(x) BPF_CORE_READ(__PT_REGS_CAST(x), __PT_IP_REG)
-
 #if defined(bpf_target_powerpc)
-
 #define BPF_KPROBE_READ_RET_IP(ip, ctx)		({ (ip) = (ctx)->link; })
 #define BPF_KRETPROBE_READ_RET_IP		BPF_KPROBE_READ_RET_IP
-
 #elif defined(bpf_target_sparc)
-
 #define BPF_KPROBE_READ_RET_IP(ip, ctx)		({ (ip) = PT_REGS_RET(ctx); })
 #define BPF_KRETPROBE_READ_RET_IP		BPF_KPROBE_READ_RET_IP
-
 #else
-
 #define BPF_KPROBE_READ_RET_IP(ip, ctx)					    \
-	({ bpf_probe_read_kernel(&(ip), sizeof(ip), (void *)PT_REGS_RET(ctx)); })
+	({ bpf_probe_read(&(ip), sizeof(ip), (void *)PT_REGS_RET(ctx)); })
 #define BPF_KRETPROBE_READ_RET_IP(ip, ctx)				    \
-	({ bpf_probe_read_kernel(&(ip), sizeof(ip), (void *)(PT_REGS_FP(ctx) + sizeof(ip))); })
-
+	({ bpf_probe_read(&(ip), sizeof(ip),				    \
+			  (void *)(PT_REGS_FP(ctx) + sizeof(ip))); })
 #endif
 
-#ifndef PT_REGS_PARM1_SYSCALL
-#define PT_REGS_PARM1_SYSCALL(x) PT_REGS_PARM1(x)
-#endif
-#define PT_REGS_PARM2_SYSCALL(x) PT_REGS_PARM2(x)
-#define PT_REGS_PARM3_SYSCALL(x) PT_REGS_PARM3(x)
-#ifndef PT_REGS_PARM4_SYSCALL
-#define PT_REGS_PARM4_SYSCALL(x) PT_REGS_PARM4(x)
-#endif
-#define PT_REGS_PARM5_SYSCALL(x) PT_REGS_PARM5(x)
-
-#ifndef PT_REGS_PARM1_CORE_SYSCALL
-#define PT_REGS_PARM1_CORE_SYSCALL(x) PT_REGS_PARM1_CORE(x)
-#endif
-#define PT_REGS_PARM2_CORE_SYSCALL(x) PT_REGS_PARM2_CORE(x)
-#define PT_REGS_PARM3_CORE_SYSCALL(x) PT_REGS_PARM3_CORE(x)
-#ifndef PT_REGS_PARM4_CORE_SYSCALL
-#define PT_REGS_PARM4_CORE_SYSCALL(x) PT_REGS_PARM4_CORE(x)
-#endif
-#define PT_REGS_PARM5_CORE_SYSCALL(x) PT_REGS_PARM5_CORE(x)
-
-#else /* defined(bpf_target_defined) */
-
-#define PT_REGS_PARM1(x) ({ _Pragma(__BPF_TARGET_MISSING); 0l; })
-#define PT_REGS_PARM2(x) ({ _Pragma(__BPF_TARGET_MISSING); 0l; })
-#define PT_REGS_PARM3(x) ({ _Pragma(__BPF_TARGET_MISSING); 0l; })
-#define PT_REGS_PARM4(x) ({ _Pragma(__BPF_TARGET_MISSING); 0l; })
-#define PT_REGS_PARM5(x) ({ _Pragma(__BPF_TARGET_MISSING); 0l; })
-#define PT_REGS_RET(x) ({ _Pragma(__BPF_TARGET_MISSING); 0l; })
-#define PT_REGS_FP(x) ({ _Pragma(__BPF_TARGET_MISSING); 0l; })
-#define PT_REGS_RC(x) ({ _Pragma(__BPF_TARGET_MISSING); 0l; })
-#define PT_REGS_SP(x) ({ _Pragma(__BPF_TARGET_MISSING); 0l; })
-#define PT_REGS_IP(x) ({ _Pragma(__BPF_TARGET_MISSING); 0l; })
-
-#define PT_REGS_PARM1_CORE(x) ({ _Pragma(__BPF_TARGET_MISSING); 0l; })
-#define PT_REGS_PARM2_CORE(x) ({ _Pragma(__BPF_TARGET_MISSING); 0l; })
-#define PT_REGS_PARM3_CORE(x) ({ _Pragma(__BPF_TARGET_MISSING); 0l; })
-#define PT_REGS_PARM4_CORE(x) ({ _Pragma(__BPF_TARGET_MISSING); 0l; })
-#define PT_REGS_PARM5_CORE(x) ({ _Pragma(__BPF_TARGET_MISSING); 0l; })
-#define PT_REGS_RET_CORE(x) ({ _Pragma(__BPF_TARGET_MISSING); 0l; })
-#define PT_REGS_FP_CORE(x) ({ _Pragma(__BPF_TARGET_MISSING); 0l; })
-#define PT_REGS_RC_CORE(x) ({ _Pragma(__BPF_TARGET_MISSING); 0l; })
-#define PT_REGS_SP_CORE(x) ({ _Pragma(__BPF_TARGET_MISSING); 0l; })
-#define PT_REGS_IP_CORE(x) ({ _Pragma(__BPF_TARGET_MISSING); 0l; })
-
-#define BPF_KPROBE_READ_RET_IP(ip, ctx) ({ _Pragma(__BPF_TARGET_MISSING); 0l; })
-#define BPF_KRETPROBE_READ_RET_IP(ip, ctx) ({ _Pragma(__BPF_TARGET_MISSING); 0l; })
-
-#define PT_REGS_PARM1_SYSCALL(x) ({ _Pragma(__BPF_TARGET_MISSING); 0l; })
-#define PT_REGS_PARM2_SYSCALL(x) ({ _Pragma(__BPF_TARGET_MISSING); 0l; })
-#define PT_REGS_PARM3_SYSCALL(x) ({ _Pragma(__BPF_TARGET_MISSING); 0l; })
-#define PT_REGS_PARM4_SYSCALL(x) ({ _Pragma(__BPF_TARGET_MISSING); 0l; })
-#define PT_REGS_PARM5_SYSCALL(x) ({ _Pragma(__BPF_TARGET_MISSING); 0l; })
-
-#define PT_REGS_PARM1_CORE_SYSCALL(x) ({ _Pragma(__BPF_TARGET_MISSING); 0l; })
-#define PT_REGS_PARM2_CORE_SYSCALL(x) ({ _Pragma(__BPF_TARGET_MISSING); 0l; })
-#define PT_REGS_PARM3_CORE_SYSCALL(x) ({ _Pragma(__BPF_TARGET_MISSING); 0l; })
-#define PT_REGS_PARM4_CORE_SYSCALL(x) ({ _Pragma(__BPF_TARGET_MISSING); 0l; })
-#define PT_REGS_PARM5_CORE_SYSCALL(x) ({ _Pragma(__BPF_TARGET_MISSING); 0l; })
-
-#endif /* defined(bpf_target_defined) */
-
-/*
- * When invoked from a syscall handler kprobe, returns a pointer to a
- * struct pt_regs containing syscall arguments and suitable for passing to
- * PT_REGS_PARMn_SYSCALL() and PT_REGS_PARMn_CORE_SYSCALL().
- */
-#ifndef PT_REGS_SYSCALL_REGS
-/* By default, assume that the arch selects ARCH_HAS_SYSCALL_WRAPPER. */
-#define PT_REGS_SYSCALL_REGS(ctx) ((struct pt_regs *)PT_REGS_PARM1(ctx))
-#endif
-
-#ifndef ___bpf_concat
 #define ___bpf_concat(a, b) a ## b
-#endif
-#ifndef ___bpf_apply
 #define ___bpf_apply(fn, n) ___bpf_concat(fn, n)
-#endif
-#ifndef ___bpf_nth
 #define ___bpf_nth(_, _1, _2, _3, _4, _5, _6, _7, _8, _9, _a, _b, _c, N, ...) N
-#endif
-#ifndef ___bpf_narg
-#define ___bpf_narg(...) ___bpf_nth(_, ##__VA_ARGS__, 12, 11, 10, 9, 8, 7, 6, 5, 4, 3, 2, 1, 0)
-#endif
+#define ___bpf_narg(...) \
+	___bpf_nth(_, ##__VA_ARGS__, 12, 11, 10, 9, 8, 7, 6, 5, 4, 3, 2, 1, 0)
+#define ___bpf_empty(...) \
+	___bpf_nth(_, ##__VA_ARGS__, N, N, N, N, N, N, N, N, N, N, 0)
 
-#define ___bpf_ctx_cast0()            ctx
-#define ___bpf_ctx_cast1(x)           ___bpf_ctx_cast0(), (void *)ctx[0]
-#define ___bpf_ctx_cast2(x, args...)  ___bpf_ctx_cast1(args), (void *)ctx[1]
-#define ___bpf_ctx_cast3(x, args...)  ___bpf_ctx_cast2(args), (void *)ctx[2]
-#define ___bpf_ctx_cast4(x, args...)  ___bpf_ctx_cast3(args), (void *)ctx[3]
-#define ___bpf_ctx_cast5(x, args...)  ___bpf_ctx_cast4(args), (void *)ctx[4]
-#define ___bpf_ctx_cast6(x, args...)  ___bpf_ctx_cast5(args), (void *)ctx[5]
-#define ___bpf_ctx_cast7(x, args...)  ___bpf_ctx_cast6(args), (void *)ctx[6]
-#define ___bpf_ctx_cast8(x, args...)  ___bpf_ctx_cast7(args), (void *)ctx[7]
-#define ___bpf_ctx_cast9(x, args...)  ___bpf_ctx_cast8(args), (void *)ctx[8]
+#define ___bpf_ctx_cast0() ctx
+#define ___bpf_ctx_cast1(x) ___bpf_ctx_cast0(), (void *)ctx[0]
+#define ___bpf_ctx_cast2(x, args...) ___bpf_ctx_cast1(args), (void *)ctx[1]
+#define ___bpf_ctx_cast3(x, args...) ___bpf_ctx_cast2(args), (void *)ctx[2]
+#define ___bpf_ctx_cast4(x, args...) ___bpf_ctx_cast3(args), (void *)ctx[3]
+#define ___bpf_ctx_cast5(x, args...) ___bpf_ctx_cast4(args), (void *)ctx[4]
+#define ___bpf_ctx_cast6(x, args...) ___bpf_ctx_cast5(args), (void *)ctx[5]
+#define ___bpf_ctx_cast7(x, args...) ___bpf_ctx_cast6(args), (void *)ctx[6]
+#define ___bpf_ctx_cast8(x, args...) ___bpf_ctx_cast7(args), (void *)ctx[7]
+#define ___bpf_ctx_cast9(x, args...) ___bpf_ctx_cast8(args), (void *)ctx[8]
 #define ___bpf_ctx_cast10(x, args...) ___bpf_ctx_cast9(args), (void *)ctx[9]
 #define ___bpf_ctx_cast11(x, args...) ___bpf_ctx_cast10(args), (void *)ctx[10]
 #define ___bpf_ctx_cast12(x, args...) ___bpf_ctx_cast11(args), (void *)ctx[11]
-#define ___bpf_ctx_cast(args...)      ___bpf_apply(___bpf_ctx_cast, ___bpf_narg(args))(args)
+#define ___bpf_ctx_cast(args...) \
+	___bpf_apply(___bpf_ctx_cast, ___bpf_narg(args))(args)
 
 /*
  * BPF_PROG is a convenience wrapper for generic tp_btf/fentry/fexit and
@@ -426,7 +336,7 @@ struct pt_regs;
  */
 #define BPF_PROG(name, args...)						    \
 name(unsigned long long *ctx);						    \
-static __always_inline typeof(name(0))					    \
+static __attribute__((always_inline)) typeof(name(0))			    \
 ____##name(unsigned long long *ctx, ##args);				    \
 typeof(name(0)) name(unsigned long long *ctx)				    \
 {									    \
@@ -435,125 +345,24 @@ typeof(name(0)) name(unsigned long long *ctx)				    \
 	return ____##name(___bpf_ctx_cast(args));			    \
 	_Pragma("GCC diagnostic pop")					    \
 }									    \
-static __always_inline typeof(name(0))					    \
+static __attribute__((always_inline)) typeof(name(0))			    \
 ____##name(unsigned long long *ctx, ##args)
 
-#ifndef ___bpf_nth2
-#define ___bpf_nth2(_, _1, _2, _3, _4, _5, _6, _7, _8, _9, _10, _11, _12, _13,	\
-		    _14, _15, _16, _17, _18, _19, _20, _21, _22, _23, _24, N, ...) N
-#endif
-#ifndef ___bpf_narg2
-#define ___bpf_narg2(...)	\
-	___bpf_nth2(_, ##__VA_ARGS__, 12, 12, 11, 11, 10, 10, 9, 9, 8, 8, 7, 7,	\
-		    6, 6, 5, 5, 4, 4, 3, 3, 2, 2, 1, 1, 0)
-#endif
-
-#define ___bpf_treg_cnt(t) \
-	__builtin_choose_expr(sizeof(t) == 1, 1,	\
-	__builtin_choose_expr(sizeof(t) == 2, 1,	\
-	__builtin_choose_expr(sizeof(t) == 4, 1,	\
-	__builtin_choose_expr(sizeof(t) == 8, 1,	\
-	__builtin_choose_expr(sizeof(t) == 16, 2,	\
-			      (void)0)))))
-
-#define ___bpf_reg_cnt0()		(0)
-#define ___bpf_reg_cnt1(t, x)		(___bpf_reg_cnt0() + ___bpf_treg_cnt(t))
-#define ___bpf_reg_cnt2(t, x, args...)	(___bpf_reg_cnt1(args) + ___bpf_treg_cnt(t))
-#define ___bpf_reg_cnt3(t, x, args...)	(___bpf_reg_cnt2(args) + ___bpf_treg_cnt(t))
-#define ___bpf_reg_cnt4(t, x, args...)	(___bpf_reg_cnt3(args) + ___bpf_treg_cnt(t))
-#define ___bpf_reg_cnt5(t, x, args...)	(___bpf_reg_cnt4(args) + ___bpf_treg_cnt(t))
-#define ___bpf_reg_cnt6(t, x, args...)	(___bpf_reg_cnt5(args) + ___bpf_treg_cnt(t))
-#define ___bpf_reg_cnt7(t, x, args...)	(___bpf_reg_cnt6(args) + ___bpf_treg_cnt(t))
-#define ___bpf_reg_cnt8(t, x, args...)	(___bpf_reg_cnt7(args) + ___bpf_treg_cnt(t))
-#define ___bpf_reg_cnt9(t, x, args...)	(___bpf_reg_cnt8(args) + ___bpf_treg_cnt(t))
-#define ___bpf_reg_cnt10(t, x, args...)	(___bpf_reg_cnt9(args) + ___bpf_treg_cnt(t))
-#define ___bpf_reg_cnt11(t, x, args...)	(___bpf_reg_cnt10(args) + ___bpf_treg_cnt(t))
-#define ___bpf_reg_cnt12(t, x, args...)	(___bpf_reg_cnt11(args) + ___bpf_treg_cnt(t))
-#define ___bpf_reg_cnt(args...)	 ___bpf_apply(___bpf_reg_cnt, ___bpf_narg2(args))(args)
-
-#define ___bpf_union_arg(t, x, n) \
-	__builtin_choose_expr(sizeof(t) == 1, ({ union { __u8 z[1]; t x; } ___t = { .z = {ctx[n]}}; ___t.x; }), \
-	__builtin_choose_expr(sizeof(t) == 2, ({ union { __u16 z[1]; t x; } ___t = { .z = {ctx[n]} }; ___t.x; }), \
-	__builtin_choose_expr(sizeof(t) == 4, ({ union { __u32 z[1]; t x; } ___t = { .z = {ctx[n]} }; ___t.x; }), \
-	__builtin_choose_expr(sizeof(t) == 8, ({ union { __u64 z[1]; t x; } ___t = {.z = {ctx[n]} }; ___t.x; }), \
-	__builtin_choose_expr(sizeof(t) == 16, ({ union { __u64 z[2]; t x; } ___t = {.z = {ctx[n], ctx[n + 1]} }; ___t.x; }), \
-			      (void)0)))))
-
-#define ___bpf_ctx_arg0(n, args...)
-#define ___bpf_ctx_arg1(n, t, x)		, ___bpf_union_arg(t, x, n - ___bpf_reg_cnt1(t, x))
-#define ___bpf_ctx_arg2(n, t, x, args...)	, ___bpf_union_arg(t, x, n - ___bpf_reg_cnt2(t, x, args)) ___bpf_ctx_arg1(n, args)
-#define ___bpf_ctx_arg3(n, t, x, args...)	, ___bpf_union_arg(t, x, n - ___bpf_reg_cnt3(t, x, args)) ___bpf_ctx_arg2(n, args)
-#define ___bpf_ctx_arg4(n, t, x, args...)	, ___bpf_union_arg(t, x, n - ___bpf_reg_cnt4(t, x, args)) ___bpf_ctx_arg3(n, args)
-#define ___bpf_ctx_arg5(n, t, x, args...)	, ___bpf_union_arg(t, x, n - ___bpf_reg_cnt5(t, x, args)) ___bpf_ctx_arg4(n, args)
-#define ___bpf_ctx_arg6(n, t, x, args...)	, ___bpf_union_arg(t, x, n - ___bpf_reg_cnt6(t, x, args)) ___bpf_ctx_arg5(n, args)
-#define ___bpf_ctx_arg7(n, t, x, args...)	, ___bpf_union_arg(t, x, n - ___bpf_reg_cnt7(t, x, args)) ___bpf_ctx_arg6(n, args)
-#define ___bpf_ctx_arg8(n, t, x, args...)	, ___bpf_union_arg(t, x, n - ___bpf_reg_cnt8(t, x, args)) ___bpf_ctx_arg7(n, args)
-#define ___bpf_ctx_arg9(n, t, x, args...)	, ___bpf_union_arg(t, x, n - ___bpf_reg_cnt9(t, x, args)) ___bpf_ctx_arg8(n, args)
-#define ___bpf_ctx_arg10(n, t, x, args...)	, ___bpf_union_arg(t, x, n - ___bpf_reg_cnt10(t, x, args)) ___bpf_ctx_arg9(n, args)
-#define ___bpf_ctx_arg11(n, t, x, args...)	, ___bpf_union_arg(t, x, n - ___bpf_reg_cnt11(t, x, args)) ___bpf_ctx_arg10(n, args)
-#define ___bpf_ctx_arg12(n, t, x, args...)	, ___bpf_union_arg(t, x, n - ___bpf_reg_cnt12(t, x, args)) ___bpf_ctx_arg11(n, args)
-#define ___bpf_ctx_arg(args...)	___bpf_apply(___bpf_ctx_arg, ___bpf_narg2(args))(___bpf_reg_cnt(args), args)
-
-#define ___bpf_ctx_decl0()
-#define ___bpf_ctx_decl1(t, x)			, t x
-#define ___bpf_ctx_decl2(t, x, args...)		, t x ___bpf_ctx_decl1(args)
-#define ___bpf_ctx_decl3(t, x, args...)		, t x ___bpf_ctx_decl2(args)
-#define ___bpf_ctx_decl4(t, x, args...)		, t x ___bpf_ctx_decl3(args)
-#define ___bpf_ctx_decl5(t, x, args...)		, t x ___bpf_ctx_decl4(args)
-#define ___bpf_ctx_decl6(t, x, args...)		, t x ___bpf_ctx_decl5(args)
-#define ___bpf_ctx_decl7(t, x, args...)		, t x ___bpf_ctx_decl6(args)
-#define ___bpf_ctx_decl8(t, x, args...)		, t x ___bpf_ctx_decl7(args)
-#define ___bpf_ctx_decl9(t, x, args...)		, t x ___bpf_ctx_decl8(args)
-#define ___bpf_ctx_decl10(t, x, args...)	, t x ___bpf_ctx_decl9(args)
-#define ___bpf_ctx_decl11(t, x, args...)	, t x ___bpf_ctx_decl10(args)
-#define ___bpf_ctx_decl12(t, x, args...)	, t x ___bpf_ctx_decl11(args)
-#define ___bpf_ctx_decl(args...)	___bpf_apply(___bpf_ctx_decl, ___bpf_narg2(args))(args)
-
-/*
- * BPF_PROG2 is an enhanced version of BPF_PROG in order to handle struct
- * arguments. Since each struct argument might take one or two u64 values
- * in the trampoline stack, argument type size is needed to place proper number
- * of u64 values for each argument. Therefore, BPF_PROG2 has different
- * syntax from BPF_PROG. For example, for the following BPF_PROG syntax:
- *
- *   int BPF_PROG(test2, int a, int b) { ... }
- *
- * the corresponding BPF_PROG2 syntax is:
- *
- *   int BPF_PROG2(test2, int, a, int, b) { ... }
- *
- * where type and the corresponding argument name are separated by comma.
- *
- * Use BPF_PROG2 macro if one of the arguments might be a struct/union larger
- * than 8 bytes:
- *
- *   int BPF_PROG2(test_struct_arg, struct bpf_testmod_struct_arg_1, a, int, b,
- *		   int, c, int, d, struct bpf_testmod_struct_arg_2, e, int, ret)
- *   {
- *        // access a, b, c, d, e, and ret directly
- *        ...
- *   }
- */
-#define BPF_PROG2(name, args...)						\
-name(unsigned long long *ctx);							\
-static __always_inline typeof(name(0))						\
-____##name(unsigned long long *ctx ___bpf_ctx_decl(args));			\
-typeof(name(0)) name(unsigned long long *ctx)					\
-{										\
-	return ____##name(ctx ___bpf_ctx_arg(args));				\
-}										\
-static __always_inline typeof(name(0))						\
-____##name(unsigned long long *ctx ___bpf_ctx_decl(args))
-
 struct pt_regs;
 
-#define ___bpf_kprobe_args0()           ctx
-#define ___bpf_kprobe_args1(x)          ___bpf_kprobe_args0(), (void *)PT_REGS_PARM1(ctx)
-#define ___bpf_kprobe_args2(x, args...) ___bpf_kprobe_args1(args), (void *)PT_REGS_PARM2(ctx)
-#define ___bpf_kprobe_args3(x, args...) ___bpf_kprobe_args2(args), (void *)PT_REGS_PARM3(ctx)
-#define ___bpf_kprobe_args4(x, args...) ___bpf_kprobe_args3(args), (void *)PT_REGS_PARM4(ctx)
-#define ___bpf_kprobe_args5(x, args...) ___bpf_kprobe_args4(args), (void *)PT_REGS_PARM5(ctx)
-#define ___bpf_kprobe_args(args...)     ___bpf_apply(___bpf_kprobe_args, ___bpf_narg(args))(args)
+#define ___bpf_kprobe_args0() ctx
+#define ___bpf_kprobe_args1(x) \
+	___bpf_kprobe_args0(), (void *)PT_REGS_PARM1(ctx)
+#define ___bpf_kprobe_args2(x, args...) \
+	___bpf_kprobe_args1(args), (void *)PT_REGS_PARM2(ctx)
+#define ___bpf_kprobe_args3(x, args...) \
+	___bpf_kprobe_args2(args), (void *)PT_REGS_PARM3(ctx)
+#define ___bpf_kprobe_args4(x, args...) \
+	___bpf_kprobe_args3(args), (void *)PT_REGS_PARM4(ctx)
+#define ___bpf_kprobe_args5(x, args...) \
+	___bpf_kprobe_args4(args), (void *)PT_REGS_PARM5(ctx)
+#define ___bpf_kprobe_args(args...) \
+	___bpf_apply(___bpf_kprobe_args, ___bpf_narg(args))(args)
 
 /*
  * BPF_KPROBE serves the same purpose for kprobes as BPF_PROG for
@@ -567,7 +376,7 @@ struct pt_regs;
  */
 #define BPF_KPROBE(name, args...)					    \
 name(struct pt_regs *ctx);						    \
-static __always_inline typeof(name(0))					    \
+static __attribute__((always_inline)) typeof(name(0))			    \
 ____##name(struct pt_regs *ctx, ##args);				    \
 typeof(name(0)) name(struct pt_regs *ctx)				    \
 {									    \
@@ -576,12 +385,14 @@ typeof(name(0)) name(struct pt_regs *ctx)				    \
 	return ____##name(___bpf_kprobe_args(args));			    \
 	_Pragma("GCC diagnostic pop")					    \
 }									    \
-static __always_inline typeof(name(0))					    \
+static __attribute__((always_inline)) typeof(name(0))			    \
 ____##name(struct pt_regs *ctx, ##args)
 
-#define ___bpf_kretprobe_args0()       ctx
-#define ___bpf_kretprobe_args1(x)      ___bpf_kretprobe_args0(), (void *)PT_REGS_RC(ctx)
-#define ___bpf_kretprobe_args(args...) ___bpf_apply(___bpf_kretprobe_args, ___bpf_narg(args))(args)
+#define ___bpf_kretprobe_args0() ctx
+#define ___bpf_kretprobe_args1(x) \
+	___bpf_kretprobe_args0(), (void *)PT_REGS_RC(ctx)
+#define ___bpf_kretprobe_args(args...) \
+	___bpf_apply(___bpf_kretprobe_args, ___bpf_narg(args))(args)
 
 /*
  * BPF_KRETPROBE is similar to BPF_KPROBE, except, it only provides optional
@@ -591,7 +402,7 @@ ____##name(struct pt_regs *ctx, ##args)
  */
 #define BPF_KRETPROBE(name, args...)					    \
 name(struct pt_regs *ctx);						    \
-static __always_inline typeof(name(0))					    \
+static __attribute__((always_inline)) typeof(name(0))			    \
 ____##name(struct pt_regs *ctx, ##args);				    \
 typeof(name(0)) name(struct pt_regs *ctx)				    \
 {									    \
@@ -602,69 +413,20 @@ typeof(name(0)) name(struct pt_regs *ctx)				    \
 }									    \
 static __always_inline typeof(name(0)) ____##name(struct pt_regs *ctx, ##args)
 
-/* If kernel has CONFIG_ARCH_HAS_SYSCALL_WRAPPER, read pt_regs directly */
-#define ___bpf_syscall_args0()           ctx
-#define ___bpf_syscall_args1(x)          ___bpf_syscall_args0(), (void *)PT_REGS_PARM1_SYSCALL(regs)
-#define ___bpf_syscall_args2(x, args...) ___bpf_syscall_args1(args), (void *)PT_REGS_PARM2_SYSCALL(regs)
-#define ___bpf_syscall_args3(x, args...) ___bpf_syscall_args2(args), (void *)PT_REGS_PARM3_SYSCALL(regs)
-#define ___bpf_syscall_args4(x, args...) ___bpf_syscall_args3(args), (void *)PT_REGS_PARM4_SYSCALL(regs)
-#define ___bpf_syscall_args5(x, args...) ___bpf_syscall_args4(args), (void *)PT_REGS_PARM5_SYSCALL(regs)
-#define ___bpf_syscall_args(args...)     ___bpf_apply(___bpf_syscall_args, ___bpf_narg(args))(args)
-
-/* If kernel doesn't have CONFIG_ARCH_HAS_SYSCALL_WRAPPER, we have to BPF_CORE_READ from pt_regs */
-#define ___bpf_syswrap_args0()           ctx
-#define ___bpf_syswrap_args1(x)          ___bpf_syswrap_args0(), (void *)PT_REGS_PARM1_CORE_SYSCALL(regs)
-#define ___bpf_syswrap_args2(x, args...) ___bpf_syswrap_args1(args), (void *)PT_REGS_PARM2_CORE_SYSCALL(regs)
-#define ___bpf_syswrap_args3(x, args...) ___bpf_syswrap_args2(args), (void *)PT_REGS_PARM3_CORE_SYSCALL(regs)
-#define ___bpf_syswrap_args4(x, args...) ___bpf_syswrap_args3(args), (void *)PT_REGS_PARM4_CORE_SYSCALL(regs)
-#define ___bpf_syswrap_args5(x, args...) ___bpf_syswrap_args4(args), (void *)PT_REGS_PARM5_CORE_SYSCALL(regs)
-#define ___bpf_syswrap_args(args...)     ___bpf_apply(___bpf_syswrap_args, ___bpf_narg(args))(args)
-
 /*
- * BPF_KSYSCALL is a variant of BPF_KPROBE, which is intended for
- * tracing syscall functions, like __x64_sys_close. It hides the underlying
- * platform-specific low-level way of getting syscall input arguments from
- * struct pt_regs, and provides a familiar typed and named function arguments
- * syntax and semantics of accessing syscall input parameters.
- *
- * Original struct pt_regs * context is preserved as 'ctx' argument. This might
- * be necessary when using BPF helpers like bpf_perf_event_output().
- *
- * At the moment BPF_KSYSCALL does not transparently handle all the calling
- * convention quirks for the following syscalls:
- *
- * - mmap(): __ARCH_WANT_SYS_OLD_MMAP.
- * - clone(): CONFIG_CLONE_BACKWARDS, CONFIG_CLONE_BACKWARDS2 and
- *            CONFIG_CLONE_BACKWARDS3.
- * - socket-related syscalls: __ARCH_WANT_SYS_SOCKETCALL.
- * - compat syscalls.
- *
- * This may or may not change in the future. User needs to take extra measures
- * to handle such quirks explicitly, if necessary.
- *
- * This macro relies on BPF CO-RE support and virtual __kconfig externs.
+ * BPF_SEQ_PRINTF to wrap bpf_seq_printf to-be-printed values
+ * in a structure.
  */
-#define BPF_KSYSCALL(name, args...)					    \
-name(struct pt_regs *ctx);						    \
-extern _Bool LINUX_HAS_SYSCALL_WRAPPER __kconfig;			    \
-static __always_inline typeof(name(0))					    \
-____##name(struct pt_regs *ctx, ##args);				    \
-typeof(name(0)) name(struct pt_regs *ctx)				    \
-{									    \
-	struct pt_regs *regs = LINUX_HAS_SYSCALL_WRAPPER		    \
-			       ? (struct pt_regs *)PT_REGS_PARM1(ctx)	    \
-			       : ctx;					    \
-	_Pragma("GCC diagnostic push")					    \
-	_Pragma("GCC diagnostic ignored \"-Wint-conversion\"")		    \
-	if (LINUX_HAS_SYSCALL_WRAPPER)					    \
-		return ____##name(___bpf_syswrap_args(args));		    \
-	else								    \
-		return ____##name(___bpf_syscall_args(args));		    \
-	_Pragma("GCC diagnostic pop")					    \
-}									    \
-static __always_inline typeof(name(0))					    \
-____##name(struct pt_regs *ctx, ##args)
-
-#define BPF_KPROBE_SYSCALL BPF_KSYSCALL
+#define BPF_SEQ_PRINTF(seq, fmt, args...)				    \
+	({								    \
+		_Pragma("GCC diagnostic push")				    \
+		_Pragma("GCC diagnostic ignored \"-Wint-conversion\"")	    \
+		static const char ___fmt[] = fmt;			    \
+		unsigned long long ___param[] = { args };		    \
+		_Pragma("GCC diagnostic pop")				    \
+		int ___ret = bpf_seq_printf(seq, ___fmt, sizeof(___fmt),    \
+					    ___param, sizeof(___param));    \
+		___ret;							    \
+	})
 
 #endif

src/btf.h

@@ -1,12 +1,10 @@
 /* SPDX-License-Identifier: (LGPL-2.1 OR BSD-2-Clause) */
 /* Copyright (c) 2018 Facebook */
-/*! \file */
 
 #ifndef __LIBBPF_BTF_H
 #define __LIBBPF_BTF_H
 
 #include <stdarg.h>
-#include <stdbool.h>
 #include <linux/btf.h>
 #include <linux/types.h>
 
@@ -26,225 +24,106 @@ struct btf_type;
 
 struct bpf_object;
 
-enum btf_endianness {
-	BTF_LITTLE_ENDIAN = 0,
-	BTF_BIG_ENDIAN = 1,
+/*
+ * The .BTF.ext ELF section layout defined as
+ *   struct btf_ext_header
+ *   func_info subsection
+ *
+ * The func_info subsection layout:
+ *   record size for struct bpf_func_info in the func_info subsection
+ *   struct btf_sec_func_info for section #1
+ *   a list of bpf_func_info records for section #1
+ *     where struct bpf_func_info mimics one in include/uapi/linux/bpf.h
+ *     but may not be identical
+ *   struct btf_sec_func_info for section #2
+ *   a list of bpf_func_info records for section #2
+ *   ......
+ *
+ * Note that the bpf_func_info record size in .BTF.ext may not
+ * be the same as the one defined in include/uapi/linux/bpf.h.
+ * The loader should ensure that record_size meets minimum
+ * requirement and pass the record as is to the kernel. The
+ * kernel will handle the func_info properly based on its contents.
+ */
+struct btf_ext_header {
+	__u16	magic;
+	__u8	version;
+	__u8	flags;
+	__u32	hdr_len;
+
+	/* All offsets are in bytes relative to the end of this header */
+	__u32	func_info_off;
+	__u32	func_info_len;
+	__u32	line_info_off;
+	__u32	line_info_len;
+
+	/* optional part of .BTF.ext header */
+	__u32	field_reloc_off;
+	__u32	field_reloc_len;
 };
 
-/**
- * @brief **btf__free()** frees all data of a BTF object
- * @param btf BTF object to free
- */
 LIBBPF_API void btf__free(struct btf *btf);
-
-/**
- * @brief **btf__new()** creates a new instance of a BTF object from the raw
- * bytes of an ELF's BTF section
- * @param data raw bytes
- * @param size number of bytes passed in `data`
- * @return new BTF object instance which has to be eventually freed with
- * **btf__free()**
- *
- * On error, error-code-encoded-as-pointer is returned, not a NULL. To extract
- * error code from such a pointer `libbpf_get_error()` should be used. If
- * `libbpf_set_strict_mode(LIBBPF_STRICT_CLEAN_PTRS)` is enabled, NULL is
- * returned on error instead. In both cases thread-local `errno` variable is
- * always set to error code as well.
- */
-LIBBPF_API struct btf *btf__new(const void *data, __u32 size);
-
-/**
- * @brief **btf__new_split()** create a new instance of a BTF object from the
- * provided raw data bytes. It takes another BTF instance, **base_btf**, which
- * serves as a base BTF, which is extended by types in a newly created BTF
- * instance
- * @param data raw bytes
- * @param size length of raw bytes
- * @param base_btf the base BTF object
- * @return new BTF object instance which has to be eventually freed with
- * **btf__free()**
- *
- * If *base_btf* is NULL, `btf__new_split()` is equivalent to `btf__new()` and
- * creates non-split BTF.
- *
- * On error, error-code-encoded-as-pointer is returned, not a NULL. To extract
- * error code from such a pointer `libbpf_get_error()` should be used. If
- * `libbpf_set_strict_mode(LIBBPF_STRICT_CLEAN_PTRS)` is enabled, NULL is
- * returned on error instead. In both cases thread-local `errno` variable is
- * always set to error code as well.
- */
-LIBBPF_API struct btf *btf__new_split(const void *data, __u32 size, struct btf *base_btf);
-
-/**
- * @brief **btf__new_empty()** creates an empty BTF object.  Use
- * `btf__add_*()` to populate such BTF object.
- * @return new BTF object instance which has to be eventually freed with
- * **btf__free()**
- *
- * On error, error-code-encoded-as-pointer is returned, not a NULL. To extract
- * error code from such a pointer `libbpf_get_error()` should be used. If
- * `libbpf_set_strict_mode(LIBBPF_STRICT_CLEAN_PTRS)` is enabled, NULL is
- * returned on error instead. In both cases thread-local `errno` variable is
- * always set to error code as well.
- */
-LIBBPF_API struct btf *btf__new_empty(void);
-
-/**
- * @brief **btf__new_empty_split()** creates an unpopulated BTF object from an
- * ELF BTF section except with a base BTF on top of which split BTF should be
- * based
- * @return new BTF object instance which has to be eventually freed with
- * **btf__free()**
- *
- * If *base_btf* is NULL, `btf__new_empty_split()` is equivalent to
- * `btf__new_empty()` and creates non-split BTF.
- *
- * On error, error-code-encoded-as-pointer is returned, not a NULL. To extract
- * error code from such a pointer `libbpf_get_error()` should be used. If
- * `libbpf_set_strict_mode(LIBBPF_STRICT_CLEAN_PTRS)` is enabled, NULL is
- * returned on error instead. In both cases thread-local `errno` variable is
- * always set to error code as well.
- */
-LIBBPF_API struct btf *btf__new_empty_split(struct btf *base_btf);
-
-LIBBPF_API struct btf *btf__parse(const char *path, struct btf_ext **btf_ext);
-LIBBPF_API struct btf *btf__parse_split(const char *path, struct btf *base_btf);
-LIBBPF_API struct btf *btf__parse_elf(const char *path, struct btf_ext **btf_ext);
-LIBBPF_API struct btf *btf__parse_elf_split(const char *path, struct btf *base_btf);
-LIBBPF_API struct btf *btf__parse_raw(const char *path);
-LIBBPF_API struct btf *btf__parse_raw_split(const char *path, struct btf *base_btf);
-
-LIBBPF_API struct btf *btf__load_vmlinux_btf(void);
-LIBBPF_API struct btf *btf__load_module_btf(const char *module_name, struct btf *vmlinux_btf);
-
-LIBBPF_API struct btf *btf__load_from_kernel_by_id(__u32 id);
-LIBBPF_API struct btf *btf__load_from_kernel_by_id_split(__u32 id, struct btf *base_btf);
-
-LIBBPF_API int btf__load_into_kernel(struct btf *btf);
+LIBBPF_API struct btf *btf__new(__u8 *data, __u32 size);
+LIBBPF_API struct btf *btf__parse_elf(const char *path,
+				      struct btf_ext **btf_ext);
+LIBBPF_API int btf__finalize_data(struct bpf_object *obj, struct btf *btf);
+LIBBPF_API int btf__load(struct btf *btf);
 LIBBPF_API __s32 btf__find_by_name(const struct btf *btf,
 				   const char *type_name);
 LIBBPF_API __s32 btf__find_by_name_kind(const struct btf *btf,
 					const char *type_name, __u32 kind);
-LIBBPF_API __u32 btf__type_cnt(const struct btf *btf);
-LIBBPF_API const struct btf *btf__base_btf(const struct btf *btf);
+LIBBPF_API __u32 btf__get_nr_types(const struct btf *btf);
 LIBBPF_API const struct btf_type *btf__type_by_id(const struct btf *btf,
 						  __u32 id);
-LIBBPF_API size_t btf__pointer_size(const struct btf *btf);
-LIBBPF_API int btf__set_pointer_size(struct btf *btf, size_t ptr_sz);
-LIBBPF_API enum btf_endianness btf__endianness(const struct btf *btf);
-LIBBPF_API int btf__set_endianness(struct btf *btf, enum btf_endianness endian);
 LIBBPF_API __s64 btf__resolve_size(const struct btf *btf, __u32 type_id);
 LIBBPF_API int btf__resolve_type(const struct btf *btf, __u32 type_id);
 LIBBPF_API int btf__align_of(const struct btf *btf, __u32 id);
 LIBBPF_API int btf__fd(const struct btf *btf);
-LIBBPF_API void btf__set_fd(struct btf *btf, int fd);
-LIBBPF_API const void *btf__raw_data(const struct btf *btf, __u32 *size);
+LIBBPF_API const void *btf__get_raw_data(const struct btf *btf, __u32 *size);
 LIBBPF_API const char *btf__name_by_offset(const struct btf *btf, __u32 offset);
-LIBBPF_API const char *btf__str_by_offset(const struct btf *btf, __u32 offset);
+LIBBPF_API int btf__get_from_id(__u32 id, struct btf **btf);
+LIBBPF_API int btf__get_map_kv_tids(const struct btf *btf, const char *map_name,
+				    __u32 expected_key_size,
+				    __u32 expected_value_size,
+				    __u32 *key_type_id, __u32 *value_type_id);
 
-LIBBPF_API struct btf_ext *btf_ext__new(const __u8 *data, __u32 size);
+LIBBPF_API struct btf_ext *btf_ext__new(__u8 *data, __u32 size);
 LIBBPF_API void btf_ext__free(struct btf_ext *btf_ext);
-LIBBPF_API const void *btf_ext__raw_data(const struct btf_ext *btf_ext, __u32 *size);
+LIBBPF_API const void *btf_ext__get_raw_data(const struct btf_ext *btf_ext,
+					     __u32 *size);
+LIBBPF_API int btf_ext__reloc_func_info(const struct btf *btf,
+					const struct btf_ext *btf_ext,
+					const char *sec_name, __u32 insns_cnt,
+					void **func_info, __u32 *cnt);
+LIBBPF_API int btf_ext__reloc_line_info(const struct btf *btf,
+					const struct btf_ext *btf_ext,
+					const char *sec_name, __u32 insns_cnt,
+					void **line_info, __u32 *cnt);
+LIBBPF_API __u32 btf_ext__func_info_rec_size(const struct btf_ext *btf_ext);
+LIBBPF_API __u32 btf_ext__line_info_rec_size(const struct btf_ext *btf_ext);
 
-LIBBPF_API int btf__find_str(struct btf *btf, const char *s);
-LIBBPF_API int btf__add_str(struct btf *btf, const char *s);
-LIBBPF_API int btf__add_type(struct btf *btf, const struct btf *src_btf,
-			     const struct btf_type *src_type);
-/**
- * @brief **btf__add_btf()** appends all the BTF types from *src_btf* into *btf*
- * @param btf BTF object which all the BTF types and strings are added to
- * @param src_btf BTF object which all BTF types and referenced strings are copied from
- * @return BTF type ID of the first appended BTF type, or negative error code
- *
- * **btf__add_btf()** can be used to simply and efficiently append the entire
- * contents of one BTF object to another one. All the BTF type data is copied
- * over, all referenced type IDs are adjusted by adding a necessary ID offset.
- * Only strings referenced from BTF types are copied over and deduplicated, so
- * if there were some unused strings in *src_btf*, those won't be copied over,
- * which is consistent with the general string deduplication semantics of BTF
- * writing APIs.
- *
- * If any error is encountered during this process, the contents of *btf* is
- * left intact, which means that **btf__add_btf()** follows the transactional
- * semantics and the operation as a whole is all-or-nothing.
- *
- * *src_btf* has to be non-split BTF, as of now copying types from split BTF
- * is not supported and will result in -ENOTSUP error code returned.
- */
-LIBBPF_API int btf__add_btf(struct btf *btf, const struct btf *src_btf);
-
-LIBBPF_API int btf__add_int(struct btf *btf, const char *name, size_t byte_sz, int encoding);
-LIBBPF_API int btf__add_float(struct btf *btf, const char *name, size_t byte_sz);
-LIBBPF_API int btf__add_ptr(struct btf *btf, int ref_type_id);
-LIBBPF_API int btf__add_array(struct btf *btf,
-			      int index_type_id, int elem_type_id, __u32 nr_elems);
-/* struct/union construction APIs */
-LIBBPF_API int btf__add_struct(struct btf *btf, const char *name, __u32 sz);
-LIBBPF_API int btf__add_union(struct btf *btf, const char *name, __u32 sz);
-LIBBPF_API int btf__add_field(struct btf *btf, const char *name, int field_type_id,
-			      __u32 bit_offset, __u32 bit_size);
-
-/* enum construction APIs */
-LIBBPF_API int btf__add_enum(struct btf *btf, const char *name, __u32 bytes_sz);
-LIBBPF_API int btf__add_enum_value(struct btf *btf, const char *name, __s64 value);
-LIBBPF_API int btf__add_enum64(struct btf *btf, const char *name, __u32 bytes_sz, bool is_signed);
-LIBBPF_API int btf__add_enum64_value(struct btf *btf, const char *name, __u64 value);
-
-enum btf_fwd_kind {
-	BTF_FWD_STRUCT = 0,
-	BTF_FWD_UNION = 1,
-	BTF_FWD_ENUM = 2,
-};
-
-LIBBPF_API int btf__add_fwd(struct btf *btf, const char *name, enum btf_fwd_kind fwd_kind);
-LIBBPF_API int btf__add_typedef(struct btf *btf, const char *name, int ref_type_id);
-LIBBPF_API int btf__add_volatile(struct btf *btf, int ref_type_id);
-LIBBPF_API int btf__add_const(struct btf *btf, int ref_type_id);
-LIBBPF_API int btf__add_restrict(struct btf *btf, int ref_type_id);
-LIBBPF_API int btf__add_type_tag(struct btf *btf, const char *value, int ref_type_id);
-
-/* func and func_proto construction APIs */
-LIBBPF_API int btf__add_func(struct btf *btf, const char *name,
-			     enum btf_func_linkage linkage, int proto_type_id);
-LIBBPF_API int btf__add_func_proto(struct btf *btf, int ret_type_id);
-LIBBPF_API int btf__add_func_param(struct btf *btf, const char *name, int type_id);
-
-/* var & datasec construction APIs */
-LIBBPF_API int btf__add_var(struct btf *btf, const char *name, int linkage, int type_id);
-LIBBPF_API int btf__add_datasec(struct btf *btf, const char *name, __u32 byte_sz);
-LIBBPF_API int btf__add_datasec_var_info(struct btf *btf, int var_type_id,
-					 __u32 offset, __u32 byte_sz);
-
-/* tag construction API */
-LIBBPF_API int btf__add_decl_tag(struct btf *btf, const char *value, int ref_type_id,
-			    int component_idx);
+LIBBPF_API struct btf *libbpf_find_kernel_btf(void);
 
 struct btf_dedup_opts {
-	size_t sz;
-	/* optional .BTF.ext info to dedup along the main BTF info */
-	struct btf_ext *btf_ext;
-	/* force hash collisions (used for testing) */
-	bool force_collisions;
-	size_t :0;
+	unsigned int dedup_table_size;
+	bool dont_resolve_fwds;
 };
-#define btf_dedup_opts__last_field force_collisions
 
-LIBBPF_API int btf__dedup(struct btf *btf, const struct btf_dedup_opts *opts);
+LIBBPF_API int btf__dedup(struct btf *btf, struct btf_ext *btf_ext,
+			  const struct btf_dedup_opts *opts);
 
 struct btf_dump;
 
 struct btf_dump_opts {
-	size_t sz;
+	void *ctx;
 };
-#define btf_dump_opts__last_field sz
 
 typedef void (*btf_dump_printf_fn_t)(void *ctx, const char *fmt, va_list args);
 
 LIBBPF_API struct btf_dump *btf_dump__new(const struct btf *btf,
-					  btf_dump_printf_fn_t printf_fn,
-					  void *ctx,
-					  const struct btf_dump_opts *opts);
-
+					  const struct btf_ext *btf_ext,
+					  const struct btf_dump_opts *opts,
+					  btf_dump_printf_fn_t printf_fn);
 LIBBPF_API void btf_dump__free(struct btf_dump *d);
 
 LIBBPF_API int btf_dump__dump_type(struct btf_dump *d, __u32 id);
@@ -264,59 +143,16 @@ struct btf_dump_emit_type_decl_opts {
 	 * necessary indentation already
 	 */
 	int indent_level;
-	/* strip all the const/volatile/restrict mods */
-	bool strip_mods;
-	size_t :0;
 };
-#define btf_dump_emit_type_decl_opts__last_field strip_mods
+#define btf_dump_emit_type_decl_opts__last_field indent_level
 
 LIBBPF_API int
 btf_dump__emit_type_decl(struct btf_dump *d, __u32 id,
 			 const struct btf_dump_emit_type_decl_opts *opts);
 
-
-struct btf_dump_type_data_opts {
-	/* size of this struct, for forward/backward compatibility */
-	size_t sz;
-	const char *indent_str;
-	int indent_level;
-	/* below match "show" flags for bpf_show_snprintf() */
-	bool compact;		/* no newlines/indentation */
-	bool skip_names;	/* skip member/type names */
-	bool emit_zeroes;	/* show 0-valued fields */
-	size_t :0;
-};
-#define btf_dump_type_data_opts__last_field emit_zeroes
-
-LIBBPF_API int
-btf_dump__dump_type_data(struct btf_dump *d, __u32 id,
-			 const void *data, size_t data_sz,
-			 const struct btf_dump_type_data_opts *opts);
-
 /*
- * A set of helpers for easier BTF types handling.
- *
- * The inline functions below rely on constants from the kernel headers which
- * may not be available for applications including this header file. To avoid
- * compilation errors, we define all the constants here that were added after
- * the initial introduction of the BTF_KIND* constants.
+ * A set of helpers for easier BTF types handling
  */
-#ifndef BTF_KIND_FUNC
-#define BTF_KIND_FUNC		12	/* Function	*/
-#define BTF_KIND_FUNC_PROTO	13	/* Function Proto	*/
-#endif
-#ifndef BTF_KIND_VAR
-#define BTF_KIND_VAR		14	/* Variable	*/
-#define BTF_KIND_DATASEC	15	/* Section	*/
-#endif
-#ifndef BTF_KIND_FLOAT
-#define BTF_KIND_FLOAT		16	/* Floating point	*/
-#endif
-/* The kernel header switched to enums, so the following were never #defined */
-#define BTF_KIND_DECL_TAG	17	/* Decl Tag */
-#define BTF_KIND_TYPE_TAG	18	/* Type Tag */
-#define BTF_KIND_ENUM64		19	/* Enum for up-to 64bit values */
-
 static inline __u16 btf_kind(const struct btf_type *t)
 {
 	return BTF_INFO_KIND(t->info);
@@ -332,11 +168,6 @@ static inline bool btf_kflag(const struct btf_type *t)
 	return BTF_INFO_KFLAG(t->info);
 }
 
-static inline bool btf_is_void(const struct btf_type *t)
-{
-	return btf_kind(t) == BTF_KIND_UNKN;
-}
-
 static inline bool btf_is_int(const struct btf_type *t)
 {
 	return btf_kind(t) == BTF_KIND_INT;
@@ -374,11 +205,6 @@ static inline bool btf_is_enum(const struct btf_type *t)
 	return btf_kind(t) == BTF_KIND_ENUM;
 }
 
-static inline bool btf_is_enum64(const struct btf_type *t)
-{
-	return btf_kind(t) == BTF_KIND_ENUM64;
-}
-
 static inline bool btf_is_fwd(const struct btf_type *t)
 {
 	return btf_kind(t) == BTF_KIND_FWD;
@@ -410,8 +236,7 @@ static inline bool btf_is_mod(const struct btf_type *t)
 
 	return kind == BTF_KIND_VOLATILE ||
 	       kind == BTF_KIND_CONST ||
-	       kind == BTF_KIND_RESTRICT ||
-	       kind == BTF_KIND_TYPE_TAG;
+	       kind == BTF_KIND_RESTRICT;
 }
 
 static inline bool btf_is_func(const struct btf_type *t)
@@ -434,33 +259,6 @@ static inline bool btf_is_datasec(const struct btf_type *t)
 	return btf_kind(t) == BTF_KIND_DATASEC;
 }
 
-static inline bool btf_is_float(const struct btf_type *t)
-{
-	return btf_kind(t) == BTF_KIND_FLOAT;
-}
-
-static inline bool btf_is_decl_tag(const struct btf_type *t)
-{
-	return btf_kind(t) == BTF_KIND_DECL_TAG;
-}
-
-static inline bool btf_is_type_tag(const struct btf_type *t)
-{
-	return btf_kind(t) == BTF_KIND_TYPE_TAG;
-}
-
-static inline bool btf_is_any_enum(const struct btf_type *t)
-{
-	return btf_is_enum(t) || btf_is_enum64(t);
-}
-
-static inline bool btf_kind_core_compat(const struct btf_type *t1,
-					const struct btf_type *t2)
-{
-	return btf_kind(t1) == btf_kind(t2) ||
-	       (btf_is_any_enum(t1) && btf_is_any_enum(t2));
-}
-
 static inline __u8 btf_int_encoding(const struct btf_type *t)
 {
 	return BTF_INT_ENCODING(*(__u32 *)(t + 1));
@@ -486,39 +284,6 @@ static inline struct btf_enum *btf_enum(const struct btf_type *t)
 	return (struct btf_enum *)(t + 1);
 }
 
-struct btf_enum64;
-
-static inline struct btf_enum64 *btf_enum64(const struct btf_type *t)
-{
-	return (struct btf_enum64 *)(t + 1);
-}
-
-static inline __u64 btf_enum64_value(const struct btf_enum64 *e)
-{
-	/* struct btf_enum64 is introduced in Linux 6.0, which is very
-	 * bleeding-edge. Here we are avoiding relying on struct btf_enum64
-	 * definition coming from kernel UAPI headers to support wider range
-	 * of system-wide kernel headers.
-	 *
-	 * Given this header can be also included from C++ applications, that
-	 * further restricts C tricks we can use (like using compatible
-	 * anonymous struct). So just treat struct btf_enum64 as
-	 * a three-element array of u32 and access second (lo32) and third
-	 * (hi32) elements directly.
-	 *
-	 * For reference, here is a struct btf_enum64 definition:
-	 *
-	 * const struct btf_enum64 {
-	 *	__u32	name_off;
-	 *	__u32	val_lo32;
-	 *	__u32	val_hi32;
-	 * };
-	 */
-	const __u32 *e64 = (const __u32 *)e;
-
-	return ((__u64)e64[2] << 32) | e64[1];
-}
-
 static inline struct btf_member *btf_members(const struct btf_type *t)
 {
 	return (struct btf_member *)(t + 1);
@@ -562,12 +327,6 @@ btf_var_secinfos(const struct btf_type *t)
 	return (struct btf_var_secinfo *)(t + 1);
 }
 
-struct btf_decl_tag;
-static inline struct btf_decl_tag *btf_decl_tag(const struct btf_type *t)
-{
-	return (struct btf_decl_tag *)(t + 1);
-}
-
 #ifdef __cplusplus
 } /* extern "C" */
 #endif

src/hashmap.c

@@ -15,9 +15,6 @@
 /* make sure libbpf doesn't use kernel-only integer typedefs */
 #pragma GCC poison u8 u16 u32 u64 s8 s16 s32 s64
 
-/* prevent accidental re-addition of reallocarray() */
-#pragma GCC poison reallocarray
-
 /* start with 4 buckets */
 #define HASHMAP_MIN_CAP_BITS 2
 
@@ -75,7 +72,7 @@ void hashmap__clear(struct hashmap *map)
 
 void hashmap__free(struct hashmap *map)
 {
-	if (IS_ERR_OR_NULL(map))
+	if (!map)
 		return;
 
 	hashmap__clear(map);
@@ -238,3 +235,4 @@ bool hashmap__delete(struct hashmap *map, const void *key,
 
 	return true;
 }
+

src/hashmap.h

@@ -11,33 +11,14 @@
 #include <stdbool.h>
 #include <stddef.h>
 #include <limits.h>
+#ifndef __WORDSIZE
+#define __WORDSIZE (__SIZEOF_LONG__ * 8)
+#endif
 
 static inline size_t hash_bits(size_t h, int bits)
 {
 	/* shuffle bits and return requested number of upper bits */
-	if (bits == 0)
-		return 0;
-
-#if (__SIZEOF_SIZE_T__ == __SIZEOF_LONG_LONG__)
-	/* LP64 case */
-	return (h * 11400714819323198485llu) >> (__SIZEOF_LONG_LONG__ * 8 - bits);
-#elif (__SIZEOF_SIZE_T__ <= __SIZEOF_LONG__)
-	return (h * 2654435769lu) >> (__SIZEOF_LONG__ * 8 - bits);
-#else
-#	error "Unsupported size_t size"
-#endif
-}
-
-/* generic C-string hashing function */
-static inline size_t str_hash(const char *s)
-{
-	size_t h = 0;
-
-	while (*s) {
-		h = h * 31 + *s;
-		s++;
-	}
-	return h;
+	return (h * 11400714819323198485llu) >> (__WORDSIZE - bits);
 }
 
 typedef size_t (*hashmap_hash_fn)(const void *key, void *ctx);
@@ -177,17 +158,17 @@ bool hashmap__find(const struct hashmap *map, const void *key, void **value);
  * @key: key to iterate entries for
  */
 #define hashmap__for_each_key_entry(map, cur, _key)			    \
-	for (cur = map->buckets						    \
-		     ? map->buckets[hash_bits(map->hash_fn((_key), map->ctx), map->cap_bits)] \
-		     : NULL;						    \
+	for (cur = ({ size_t bkt = hash_bits(map->hash_fn((_key), map->ctx),\
+					     map->cap_bits);		    \
+		     map->buckets ? map->buckets[bkt] : NULL; });	    \
 	     cur;							    \
 	     cur = cur->next)						    \
 		if (map->equal_fn(cur->key, (_key), map->ctx))
 
 #define hashmap__for_each_key_entry_safe(map, cur, tmp, _key)		    \
-	for (cur = map->buckets						    \
-		     ? map->buckets[hash_bits(map->hash_fn((_key), map->ctx), map->cap_bits)] \
-		     : NULL;						    \
+	for (cur = ({ size_t bkt = hash_bits(map->hash_fn((_key), map->ctx),\
+					     map->cap_bits);		    \
+		     cur = map->buckets ? map->buckets[bkt] : NULL; });	    \
 	     cur && ({ tmp = cur->next; true; });			    \
 	     cur = tmp)							    \
 		if (map->equal_fn(cur->key, (_key), map->ctx))

src/libbpf.map

@@ -1,14 +1,29 @@
 LIBBPF_0.0.1 {
 	global:
 		bpf_btf_get_fd_by_id;
+		bpf_create_map;
+		bpf_create_map_in_map;
+		bpf_create_map_in_map_node;
+		bpf_create_map_name;
+		bpf_create_map_node;
+		bpf_create_map_xattr;
+		bpf_load_btf;
+		bpf_load_program;
+		bpf_load_program_xattr;
 		bpf_map__btf_key_type_id;
 		bpf_map__btf_value_type_id;
+		bpf_map__def;
 		bpf_map__fd;
+		bpf_map__is_offload_neutral;
 		bpf_map__name;
+		bpf_map__next;
 		bpf_map__pin;
+		bpf_map__prev;
+		bpf_map__priv;
 		bpf_map__reuse_fd;
 		bpf_map__set_ifindex;
 		bpf_map__set_inner_map_fd;
+		bpf_map__set_priv;
 		bpf_map__unpin;
 		bpf_map_delete_elem;
 		bpf_map_get_fd_by_id;
@@ -23,37 +38,79 @@ LIBBPF_0.0.1 {
 		bpf_object__btf_fd;
 		bpf_object__close;
 		bpf_object__find_map_by_name;
+		bpf_object__find_map_by_offset;
+		bpf_object__find_program_by_title;
 		bpf_object__kversion;
 		bpf_object__load;
 		bpf_object__name;
+		bpf_object__next;
 		bpf_object__open;
+		bpf_object__open_buffer;
+		bpf_object__open_xattr;
 		bpf_object__pin;
 		bpf_object__pin_maps;
 		bpf_object__pin_programs;
+		bpf_object__priv;
+		bpf_object__set_priv;
+		bpf_object__unload;
 		bpf_object__unpin_maps;
 		bpf_object__unpin_programs;
+		bpf_perf_event_read_simple;
 		bpf_prog_attach;
 		bpf_prog_detach;
 		bpf_prog_detach2;
 		bpf_prog_get_fd_by_id;
 		bpf_prog_get_next_id;
+		bpf_prog_load;
+		bpf_prog_load_xattr;
 		bpf_prog_query;
+		bpf_prog_test_run;
+		bpf_prog_test_run_xattr;
 		bpf_program__fd;
+		bpf_program__is_kprobe;
+		bpf_program__is_perf_event;
+		bpf_program__is_raw_tracepoint;
+		bpf_program__is_sched_act;
+		bpf_program__is_sched_cls;
+		bpf_program__is_socket_filter;
+		bpf_program__is_tracepoint;
+		bpf_program__is_xdp;
+		bpf_program__load;
+		bpf_program__next;
+		bpf_program__nth_fd;
 		bpf_program__pin;
+		bpf_program__pin_instance;
+		bpf_program__prev;
+		bpf_program__priv;
 		bpf_program__set_expected_attach_type;
 		bpf_program__set_ifindex;
+		bpf_program__set_kprobe;
+		bpf_program__set_perf_event;
+		bpf_program__set_prep;
+		bpf_program__set_priv;
+		bpf_program__set_raw_tracepoint;
+		bpf_program__set_sched_act;
+		bpf_program__set_sched_cls;
+		bpf_program__set_socket_filter;
+		bpf_program__set_tracepoint;
 		bpf_program__set_type;
+		bpf_program__set_xdp;
+		bpf_program__title;
 		bpf_program__unload;
 		bpf_program__unpin;
+		bpf_program__unpin_instance;
 		bpf_prog_linfo__free;
 		bpf_prog_linfo__new;
 		bpf_prog_linfo__lfind_addr_func;
 		bpf_prog_linfo__lfind;
 		bpf_raw_tracepoint_open;
+		bpf_set_link_xdp_fd;
 		bpf_task_fd_query;
+		bpf_verify_program;
 		btf__fd;
 		btf__find_by_name;
 		btf__free;
+		btf__get_from_id;
 		btf__name_by_offset;
 		btf__new;
 		btf__resolve_size;
@@ -70,24 +127,48 @@ LIBBPF_0.0.1 {
 
 LIBBPF_0.0.2 {
 	global:
+		bpf_probe_helper;
+		bpf_probe_map_type;
+		bpf_probe_prog_type;
+		bpf_map__resize;
 		bpf_map_lookup_elem_flags;
 		bpf_object__btf;
 		bpf_object__find_map_fd_by_name;
+		bpf_get_link_xdp_id;
+		btf__dedup;
+		btf__get_map_kv_tids;
+		btf__get_nr_types;
 		btf__get_raw_data;
+		btf__load;
 		btf_ext__free;
+		btf_ext__func_info_rec_size;
 		btf_ext__get_raw_data;
+		btf_ext__line_info_rec_size;
 		btf_ext__new;
+		btf_ext__reloc_func_info;
+		btf_ext__reloc_line_info;
+		xsk_umem__create;
+		xsk_socket__create;
+		xsk_umem__delete;
+		xsk_socket__delete;
+		xsk_umem__fd;
+		xsk_socket__fd;
+		bpf_program__get_prog_info_linear;
+		bpf_program__bpil_addr_to_offs;
+		bpf_program__bpil_offs_to_addr;
 } LIBBPF_0.0.1;
 
 LIBBPF_0.0.3 {
 	global:
 		bpf_map__is_internal;
 		bpf_map_freeze;
+		btf__finalize_data;
 } LIBBPF_0.0.2;
 
 LIBBPF_0.0.4 {
 	global:
 		bpf_link__destroy;
+		bpf_object__load_xattr;
 		bpf_program__attach_kprobe;
 		bpf_program__attach_perf_event;
 		bpf_program__attach_raw_tracepoint;
@@ -95,10 +176,14 @@ LIBBPF_0.0.4 {
 		bpf_program__attach_uprobe;
 		btf_dump__dump_type;
 		btf_dump__free;
+		btf_dump__new;
 		btf__parse_elf;
 		libbpf_num_possible_cpus;
 		perf_buffer__free;
+		perf_buffer__new;
+		perf_buffer__new_raw;
 		perf_buffer__poll;
+		xsk_umem__create;
 } LIBBPF_0.0.3;
 
 LIBBPF_0.0.5 {
@@ -108,6 +193,7 @@ LIBBPF_0.0.5 {
 
 LIBBPF_0.0.6 {
 	global:
+		bpf_get_link_xdp_info;
 		bpf_map__get_pin_path;
 		bpf_map__is_pinned;
 		bpf_map__set_pin_path;
@@ -116,6 +202,9 @@ LIBBPF_0.0.6 {
 		bpf_program__attach_trace;
 		bpf_program__get_expected_attach_type;
 		bpf_program__get_type;
+		bpf_program__is_tracing;
+		bpf_program__set_tracing;
+		bpf_program__size;
 		btf__find_by_name_kind;
 		libbpf_find_vmlinux_btf_id;
 } LIBBPF_0.0.5;
@@ -135,8 +224,14 @@ LIBBPF_0.0.7 {
 		bpf_object__detach_skeleton;
 		bpf_object__load_skeleton;
 		bpf_object__open_skeleton;
+		bpf_probe_large_insn_limit;
+		bpf_prog_attach_xattr;
 		bpf_program__attach;
 		bpf_program__name;
+		bpf_program__is_extension;
+		bpf_program__is_struct_ops;
+		bpf_program__set_extension;
+		bpf_program__set_struct_ops;
 		btf__align_of;
 		libbpf_find_kernel_btf;
 } LIBBPF_0.0.6;
@@ -152,10 +247,12 @@ LIBBPF_0.0.8 {
 		bpf_link_create;
 		bpf_link_update;
 		bpf_map__set_initial_value;
-		bpf_prog_attach_opts;
 		bpf_program__attach_cgroup;
 		bpf_program__attach_lsm;
+		bpf_program__is_lsm;
 		bpf_program__set_attach_target;
+		bpf_program__set_lsm;
+		bpf_set_link_xdp_fd_opts;
 } LIBBPF_0.0.7;
 
 LIBBPF_0.0.9 {
@@ -173,208 +270,3 @@ LIBBPF_0.0.9 {
 		ring_buffer__new;
 		ring_buffer__poll;
 } LIBBPF_0.0.8;
-
-LIBBPF_0.1.0 {
-	global:
-		bpf_link__detach;
-		bpf_link_detach;
-		bpf_map__ifindex;
-		bpf_map__key_size;
-		bpf_map__map_flags;
-		bpf_map__max_entries;
-		bpf_map__numa_node;
-		bpf_map__set_key_size;
-		bpf_map__set_map_flags;
-		bpf_map__set_max_entries;
-		bpf_map__set_numa_node;
-		bpf_map__set_type;
-		bpf_map__set_value_size;
-		bpf_map__type;
-		bpf_map__value_size;
-		bpf_program__attach_xdp;
-		bpf_program__autoload;
-		bpf_program__set_autoload;
-		btf__parse;
-		btf__parse_raw;
-		btf__pointer_size;
-		btf__set_fd;
-		btf__set_pointer_size;
-} LIBBPF_0.0.9;
-
-LIBBPF_0.2.0 {
-	global:
-		bpf_prog_bind_map;
-		bpf_prog_test_run_opts;
-		bpf_program__attach_freplace;
-		bpf_program__section_name;
-		btf__add_array;
-		btf__add_const;
-		btf__add_enum;
-		btf__add_enum_value;
-		btf__add_datasec;
-		btf__add_datasec_var_info;
-		btf__add_field;
-		btf__add_func;
-		btf__add_func_param;
-		btf__add_func_proto;
-		btf__add_fwd;
-		btf__add_int;
-		btf__add_ptr;
-		btf__add_restrict;
-		btf__add_str;
-		btf__add_struct;
-		btf__add_typedef;
-		btf__add_union;
-		btf__add_var;
-		btf__add_volatile;
-		btf__endianness;
-		btf__find_str;
-		btf__new_empty;
-		btf__set_endianness;
-		btf__str_by_offset;
-		perf_buffer__buffer_cnt;
-		perf_buffer__buffer_fd;
-		perf_buffer__epoll_fd;
-		perf_buffer__consume_buffer;
-} LIBBPF_0.1.0;
-
-LIBBPF_0.3.0 {
-	global:
-		btf__base_btf;
-		btf__parse_elf_split;
-		btf__parse_raw_split;
-		btf__parse_split;
-		btf__new_empty_split;
-		btf__new_split;
-		ring_buffer__epoll_fd;
-} LIBBPF_0.2.0;
-
-LIBBPF_0.4.0 {
-	global:
-		btf__add_float;
-		btf__add_type;
-		bpf_linker__add_file;
-		bpf_linker__finalize;
-		bpf_linker__free;
-		bpf_linker__new;
-		bpf_map__inner_map;
-		bpf_object__set_kversion;
-		bpf_tc_attach;
-		bpf_tc_detach;
-		bpf_tc_hook_create;
-		bpf_tc_hook_destroy;
-		bpf_tc_query;
-} LIBBPF_0.3.0;
-
-LIBBPF_0.5.0 {
-	global:
-		bpf_map__initial_value;
-		bpf_map__pin_path;
-		bpf_map_lookup_and_delete_elem_flags;
-		bpf_program__attach_kprobe_opts;
-		bpf_program__attach_perf_event_opts;
-		bpf_program__attach_tracepoint_opts;
-		bpf_program__attach_uprobe_opts;
-		bpf_object__gen_loader;
-		btf__load_from_kernel_by_id;
-		btf__load_from_kernel_by_id_split;
-		btf__load_into_kernel;
-		btf__load_module_btf;
-		btf__load_vmlinux_btf;
-		btf_dump__dump_type_data;
-		libbpf_set_strict_mode;
-} LIBBPF_0.4.0;
-
-LIBBPF_0.6.0 {
-	global:
-		bpf_map__map_extra;
-		bpf_map__set_map_extra;
-		bpf_map_create;
-		bpf_object__next_map;
-		bpf_object__next_program;
-		bpf_object__prev_map;
-		bpf_object__prev_program;
-		bpf_prog_load;
-		bpf_program__flags;
-		bpf_program__insn_cnt;
-		bpf_program__insns;
-		bpf_program__set_flags;
-		btf__add_btf;
-		btf__add_decl_tag;
-		btf__add_type_tag;
-		btf__dedup;
-		btf__raw_data;
-		btf__type_cnt;
-		btf_dump__new;
-		libbpf_major_version;
-		libbpf_minor_version;
-		libbpf_version_string;
-		perf_buffer__new;
-		perf_buffer__new_raw;
-} LIBBPF_0.5.0;
-
-LIBBPF_0.7.0 {
-	global:
-		bpf_btf_load;
-		bpf_program__expected_attach_type;
-		bpf_program__log_buf;
-		bpf_program__log_level;
-		bpf_program__set_log_buf;
-		bpf_program__set_log_level;
-		bpf_program__type;
-		bpf_xdp_attach;
-		bpf_xdp_detach;
-		bpf_xdp_query;
-		bpf_xdp_query_id;
-		btf_ext__raw_data;
-		libbpf_probe_bpf_helper;
-		libbpf_probe_bpf_map_type;
-		libbpf_probe_bpf_prog_type;
-		libbpf_set_memlock_rlim;
-} LIBBPF_0.6.0;
-
-LIBBPF_0.8.0 {
-	global:
-		bpf_map__autocreate;
-		bpf_map__get_next_key;
-		bpf_map__delete_elem;
-		bpf_map__lookup_and_delete_elem;
-		bpf_map__lookup_elem;
-		bpf_map__set_autocreate;
-		bpf_map__update_elem;
-		bpf_map_delete_elem_flags;
-		bpf_object__destroy_subskeleton;
-		bpf_object__open_subskeleton;
-		bpf_program__attach_kprobe_multi_opts;
-		bpf_program__attach_trace_opts;
-		bpf_program__attach_usdt;
-		bpf_program__set_insns;
-		libbpf_register_prog_handler;
-		libbpf_unregister_prog_handler;
-} LIBBPF_0.7.0;
-
-LIBBPF_1.0.0 {
-	global:
-		bpf_obj_get_opts;
-		bpf_prog_query_opts;
-		bpf_program__attach_ksyscall;
-		bpf_program__autoattach;
-		bpf_program__set_autoattach;
-		btf__add_enum64;
-		btf__add_enum64_value;
-		libbpf_bpf_attach_type_str;
-		libbpf_bpf_link_type_str;
-		libbpf_bpf_map_type_str;
-		libbpf_bpf_prog_type_str;
-		perf_buffer__buffer;
-};
-
-LIBBPF_1.1.0 {
-	global:
-		user_ring_buffer__discard;
-		user_ring_buffer__free;
-		user_ring_buffer__new;
-		user_ring_buffer__reserve;
-		user_ring_buffer__reserve_blocking;
-		user_ring_buffer__submit;
-} LIBBPF_1.0.0;

src/libbpf_common.h

@@ -10,44 +10,11 @@
 #define __LIBBPF_LIBBPF_COMMON_H
 
 #include <string.h>
-#include "libbpf_version.h"
 
 #ifndef LIBBPF_API
 #define LIBBPF_API __attribute__((visibility("default")))
 #endif
 
-#define LIBBPF_DEPRECATED(msg) __attribute__((deprecated(msg)))
-
-/* Mark a symbol as deprecated when libbpf version is >= {major}.{minor} */
-#define LIBBPF_DEPRECATED_SINCE(major, minor, msg)			    \
-	__LIBBPF_MARK_DEPRECATED_ ## major ## _ ## minor		    \
-		(LIBBPF_DEPRECATED("libbpf v" # major "." # minor "+: " msg))
-
-#define __LIBBPF_CURRENT_VERSION_GEQ(major, minor)			    \
-	(LIBBPF_MAJOR_VERSION > (major) ||				    \
-	 (LIBBPF_MAJOR_VERSION == (major) && LIBBPF_MINOR_VERSION >= (minor)))
-
-/* Add checks for other versions below when planning deprecation of API symbols
- * with the LIBBPF_DEPRECATED_SINCE macro.
- */
-#if __LIBBPF_CURRENT_VERSION_GEQ(1, 0)
-#define __LIBBPF_MARK_DEPRECATED_1_0(X) X
-#else
-#define __LIBBPF_MARK_DEPRECATED_1_0(X)
-#endif
-
-/* This set of internal macros allows to do "function overloading" based on
- * number of arguments provided by used in backwards-compatible way during the
- * transition to libbpf 1.0
- * It's ugly but necessary evil that will be cleaned up when we get to 1.0.
- * See bpf_prog_load() overload for example.
- */
-#define ___libbpf_cat(A, B) A ## B
-#define ___libbpf_select(NAME, NUM) ___libbpf_cat(NAME, NUM)
-#define ___libbpf_nth(_1, _2, _3, _4, _5, _6, N, ...) N
-#define ___libbpf_cnt(...) ___libbpf_nth(__VA_ARGS__, 6, 5, 4, 3, 2, 1)
-#define ___libbpf_overload(NAME, ...) ___libbpf_select(NAME, ___libbpf_cnt(__VA_ARGS__))(__VA_ARGS__)
-
 /* Helper macro to declare and initialize libbpf options struct
  *
  * This dance with uninitialized declaration, followed by memset to zero,
@@ -61,7 +28,7 @@
  * including any extra padding, it with memset() and then assigns initial
  * values provided by users in struct initializer-syntax as varargs.
  */
-#define LIBBPF_OPTS(TYPE, NAME, ...)					    \
+#define DECLARE_LIBBPF_OPTS(TYPE, NAME, ...)				    \
 	struct TYPE NAME = ({ 						    \
 		memset(&NAME, 0, sizeof(struct TYPE));			    \
 		(struct TYPE) {						    \

src/libbpf_errno.c

@@ -12,7 +12,6 @@
 #include <string.h>
 
 #include "libbpf.h"
-#include "libbpf_internal.h"
 
 /* make sure libbpf doesn't use kernel-only integer typedefs */
 #pragma GCC poison u8 u16 u32 u64 s8 s16 s32 s64
@@ -40,7 +39,7 @@ static const char *libbpf_strerror_table[NR_ERRNO] = {
 int libbpf_strerror(int err, char *buf, size_t size)
 {
 	if (!buf || !size)
-		return libbpf_err(-EINVAL);
+		return -1;
 
 	err = err > 0 ? err : -err;
 
@@ -49,7 +48,7 @@ int libbpf_strerror(int err, char *buf, size_t size)
 
 		ret = strerror_r(err, buf, size);
 		buf[size - 1] = '\0';
-		return libbpf_err_errno(ret);
+		return ret;
 	}
 
 	if (err < __LIBBPF_ERRNO__END) {
@@ -63,5 +62,5 @@ int libbpf_strerror(int err, char *buf, size_t size)
 
 	snprintf(buf, size, "Unknown libbpf error %d", err);
 	buf[size - 1] = '\0';
-	return libbpf_err(-ENOENT);
+	return -1;
 }

src/libbpf_internal.h

@@ -9,53 +9,7 @@
 #ifndef __LIBBPF_LIBBPF_INTERNAL_H
 #define __LIBBPF_LIBBPF_INTERNAL_H
 
-#include <stdlib.h>
-#include <limits.h>
-#include <errno.h>
-#include <linux/err.h>
-#include <fcntl.h>
-#include <unistd.h>
-#include "relo_core.h"
-
-/* make sure libbpf doesn't use kernel-only integer typedefs */
-#pragma GCC poison u8 u16 u32 u64 s8 s16 s32 s64
-
-/* prevent accidental re-addition of reallocarray() */
-#pragma GCC poison reallocarray
-
 #include "libbpf.h"
-#include "btf.h"
-
-#ifndef EM_BPF
-#define EM_BPF 247
-#endif
-
-#ifndef R_BPF_64_64
-#define R_BPF_64_64 1
-#endif
-#ifndef R_BPF_64_ABS64
-#define R_BPF_64_ABS64 2
-#endif
-#ifndef R_BPF_64_ABS32
-#define R_BPF_64_ABS32 3
-#endif
-#ifndef R_BPF_64_32
-#define R_BPF_64_32 10
-#endif
-
-#ifndef SHT_LLVM_ADDRSIG
-#define SHT_LLVM_ADDRSIG 0x6FFF4C03
-#endif
-
-/* if libelf is old and doesn't support mmap(), fall back to read() */
-#ifndef ELF_C_READ_MMAP
-#define ELF_C_READ_MMAP ELF_C_READ
-#endif
-
-/* Older libelf all end up in this expression, for both 32 and 64 bit */
-#ifndef ELF64_ST_VISIBILITY
-#define ELF64_ST_VISIBILITY(o) ((o) & 0x03)
-#endif
 
 #define BTF_INFO_ENC(kind, kind_flag, vlen) \
 	((!!(kind_flag) << 31) | ((kind) << 24) | ((vlen) & BTF_MAX_VLEN))
@@ -68,19 +22,7 @@
 #define BTF_MEMBER_ENC(name, type, bits_offset) (name), (type), (bits_offset)
 #define BTF_PARAM_ENC(name, type) (name), (type)
 #define BTF_VAR_SECINFO_ENC(type, offset, size) (type), (offset), (size)
-#define BTF_TYPE_FLOAT_ENC(name, sz) \
-	BTF_TYPE_ENC(name, BTF_INFO_ENC(BTF_KIND_FLOAT, 0, 0), sz)
-#define BTF_TYPE_DECL_TAG_ENC(value, type, component_idx) \
-	BTF_TYPE_ENC(value, BTF_INFO_ENC(BTF_KIND_DECL_TAG, 0, 0), type), (component_idx)
-#define BTF_TYPE_TYPE_TAG_ENC(value, type) \
-	BTF_TYPE_ENC(value, BTF_INFO_ENC(BTF_KIND_TYPE_TAG, 0, 0), type)
 
-#ifndef likely
-#define likely(x) __builtin_expect(!!(x), 1)
-#endif
-#ifndef unlikely
-#define unlikely(x) __builtin_expect(!!(x), 0)
-#endif
 #ifndef min
 # define min(x, y) ((x) < (y) ? (x) : (y))
 #endif
@@ -91,55 +33,21 @@
 # define offsetofend(TYPE, FIELD) \
 	(offsetof(TYPE, FIELD) + sizeof(((TYPE *)0)->FIELD))
 #endif
-#ifndef __alias
-#define __alias(symbol) __attribute__((alias(#symbol)))
-#endif
-
-/* Check whether a string `str` has prefix `pfx`, regardless if `pfx` is
- * a string literal known at compilation time or char * pointer known only at
- * runtime.
- */
-#define str_has_pfx(str, pfx) \
-	(strncmp(str, pfx, __builtin_constant_p(pfx) ? sizeof(pfx) - 1 : strlen(pfx)) == 0)
-
-/* suffix check */
-static inline bool str_has_sfx(const char *str, const char *sfx)
-{
-	size_t str_len = strlen(str);
-	size_t sfx_len = strlen(sfx);
-
-	if (sfx_len > str_len)
-		return false;
-	return strcmp(str + str_len - sfx_len, sfx) == 0;
-}
 
 /* Symbol versioning is different between static and shared library.
  * Properly versioned symbols are needed for shared library, but
  * only the symbol of the new version is needed for static library.
- * Starting with GNU C 10, use symver attribute instead of .symver assembler
- * directive, which works better with GCC LTO builds.
  */
-#if defined(SHARED) && defined(__GNUC__) && __GNUC__ >= 10
-
-#define DEFAULT_VERSION(internal_name, api_name, version) \
-	__attribute__((symver(#api_name "@@" #version)))
-#define COMPAT_VERSION(internal_name, api_name, version) \
-	__attribute__((symver(#api_name "@" #version)))
-
-#elif defined(SHARED)
-
-#define COMPAT_VERSION(internal_name, api_name, version) \
+#ifdef SHARED
+# define COMPAT_VERSION(internal_name, api_name, version) \
 	asm(".symver " #internal_name "," #api_name "@" #version);
-#define DEFAULT_VERSION(internal_name, api_name, version) \
+# define DEFAULT_VERSION(internal_name, api_name, version) \
 	asm(".symver " #internal_name "," #api_name "@@" #version);
-
-#else /* !SHARED */
-
-#define COMPAT_VERSION(internal_name, api_name, version)
-#define DEFAULT_VERSION(internal_name, api_name, version) \
+#else
+# define COMPAT_VERSION(internal_name, api_name, version)
+# define DEFAULT_VERSION(internal_name, api_name, version) \
 	extern typeof(internal_name) api_name \
 	__attribute__((alias(#internal_name)));
-
 #endif
 
 extern void libbpf_print(enum libbpf_print_level level,
@@ -155,129 +63,6 @@ do {				\
 #define pr_info(fmt, ...)	__pr(LIBBPF_INFO, fmt, ##__VA_ARGS__)
 #define pr_debug(fmt, ...)	__pr(LIBBPF_DEBUG, fmt, ##__VA_ARGS__)
 
-#ifndef __has_builtin
-#define __has_builtin(x) 0
-#endif
-
-struct bpf_link {
-	int (*detach)(struct bpf_link *link);
-	void (*dealloc)(struct bpf_link *link);
-	char *pin_path;		/* NULL, if not pinned */
-	int fd;			/* hook FD, -1 if not applicable */
-	bool disconnected;
-};
-
-/*
- * Re-implement glibc's reallocarray() for libbpf internal-only use.
- * reallocarray(), unfortunately, is not available in all versions of glibc,
- * so requires extra feature detection and using reallocarray() stub from
- * <tools/libc_compat.h> and COMPAT_NEED_REALLOCARRAY. All this complicates
- * build of libbpf unnecessarily and is just a maintenance burden. Instead,
- * it's trivial to implement libbpf-specific internal version and use it
- * throughout libbpf.
- */
-static inline void *libbpf_reallocarray(void *ptr, size_t nmemb, size_t size)
-{
-	size_t total;
-
-#if __has_builtin(__builtin_mul_overflow)
-	if (unlikely(__builtin_mul_overflow(nmemb, size, &total)))
-		return NULL;
-#else
-	if (size == 0 || nmemb > ULONG_MAX / size)
-		return NULL;
-	total = nmemb * size;
-#endif
-	return realloc(ptr, total);
-}
-
-/* Copy up to sz - 1 bytes from zero-terminated src string and ensure that dst
- * is zero-terminated string no matter what (unless sz == 0, in which case
- * it's a no-op). It's conceptually close to FreeBSD's strlcpy(), but differs
- * in what is returned. Given this is internal helper, it's trivial to extend
- * this, when necessary. Use this instead of strncpy inside libbpf source code.
- */
-static inline void libbpf_strlcpy(char *dst, const char *src, size_t sz)
-{
-	size_t i;
-
-	if (sz == 0)
-		return;
-
-	sz--;
-	for (i = 0; i < sz && src[i]; i++)
-		dst[i] = src[i];
-	dst[i] = '\0';
-}
-
-__u32 get_kernel_version(void);
-
-struct btf;
-struct btf_type;
-
-struct btf_type *btf_type_by_id(const struct btf *btf, __u32 type_id);
-const char *btf_kind_str(const struct btf_type *t);
-const struct btf_type *skip_mods_and_typedefs(const struct btf *btf, __u32 id, __u32 *res_id);
-
-static inline enum btf_func_linkage btf_func_linkage(const struct btf_type *t)
-{
-	return (enum btf_func_linkage)(int)btf_vlen(t);
-}
-
-static inline __u32 btf_type_info(int kind, int vlen, int kflag)
-{
-	return (kflag << 31) | (kind << 24) | vlen;
-}
-
-enum map_def_parts {
-	MAP_DEF_MAP_TYPE	= 0x001,
-	MAP_DEF_KEY_TYPE	= 0x002,
-	MAP_DEF_KEY_SIZE	= 0x004,
-	MAP_DEF_VALUE_TYPE	= 0x008,
-	MAP_DEF_VALUE_SIZE	= 0x010,
-	MAP_DEF_MAX_ENTRIES	= 0x020,
-	MAP_DEF_MAP_FLAGS	= 0x040,
-	MAP_DEF_NUMA_NODE	= 0x080,
-	MAP_DEF_PINNING		= 0x100,
-	MAP_DEF_INNER_MAP	= 0x200,
-	MAP_DEF_MAP_EXTRA	= 0x400,
-
-	MAP_DEF_ALL		= 0x7ff, /* combination of all above */
-};
-
-struct btf_map_def {
-	enum map_def_parts parts;
-	__u32 map_type;
-	__u32 key_type_id;
-	__u32 key_size;
-	__u32 value_type_id;
-	__u32 value_size;
-	__u32 max_entries;
-	__u32 map_flags;
-	__u32 numa_node;
-	__u32 pinning;
-	__u64 map_extra;
-};
-
-int parse_btf_map_def(const char *map_name, struct btf *btf,
-		      const struct btf_type *def_t, bool strict,
-		      struct btf_map_def *map_def, struct btf_map_def *inner_def);
-
-void *libbpf_add_mem(void **data, size_t *cap_cnt, size_t elem_sz,
-		     size_t cur_cnt, size_t max_cnt, size_t add_cnt);
-int libbpf_ensure_mem(void **data, size_t *cap_cnt, size_t elem_sz, size_t need_cnt);
-
-static inline bool libbpf_is_mem_zeroed(const char *p, ssize_t len)
-{
-	while (len > 0) {
-		if (*p)
-			return false;
-		p++;
-		len--;
-	}
-	return true;
-}
-
 static inline bool libbpf_validate_opts(const char *opts,
 					size_t opts_sz, size_t user_sz,
 					const char *type_name)
@@ -286,9 +71,16 @@ static inline bool libbpf_validate_opts(const char *opts,
 		pr_warn("%s size (%zu) is too small\n", type_name, user_sz);
 		return false;
 	}
-	if (!libbpf_is_mem_zeroed(opts + opts_sz, (ssize_t)user_sz - opts_sz)) {
-		pr_warn("%s has non-zero extra bytes\n", type_name);
-		return false;
+	if (user_sz > opts_sz) {
+		size_t i;
+
+		for (i = opts_sz; i < user_sz; i++) {
+			if (opts[i]) {
+				pr_warn("%s has non-zero extra bytes\n",
+					type_name);
+				return false;
+			}
+		}
 	}
 	return true;
 }
@@ -302,74 +94,28 @@ static inline bool libbpf_validate_opts(const char *opts,
 	((opts) && opts->sz >= offsetofend(typeof(*(opts)), field))
 #define OPTS_GET(opts, field, fallback_value) \
 	(OPTS_HAS(opts, field) ? (opts)->field : fallback_value)
-#define OPTS_SET(opts, field, value)		\
-	do {					\
-		if (OPTS_HAS(opts, field))	\
-			(opts)->field = value;	\
-	} while (0)
-
-#define OPTS_ZEROED(opts, last_nonzero_field)				      \
-({									      \
-	ssize_t __off = offsetofend(typeof(*(opts)), last_nonzero_field);     \
-	!(opts) || libbpf_is_mem_zeroed((const void *)opts + __off,	      \
-					(opts)->sz - __off);		      \
-})
-
-enum kern_feature_id {
-	/* v4.14: kernel support for program & map names. */
-	FEAT_PROG_NAME,
-	/* v5.2: kernel support for global data sections. */
-	FEAT_GLOBAL_DATA,
-	/* BTF support */
-	FEAT_BTF,
-	/* BTF_KIND_FUNC and BTF_KIND_FUNC_PROTO support */
-	FEAT_BTF_FUNC,
-	/* BTF_KIND_VAR and BTF_KIND_DATASEC support */
-	FEAT_BTF_DATASEC,
-	/* BTF_FUNC_GLOBAL is supported */
-	FEAT_BTF_GLOBAL_FUNC,
-	/* BPF_F_MMAPABLE is supported for arrays */
-	FEAT_ARRAY_MMAP,
-	/* kernel support for expected_attach_type in BPF_PROG_LOAD */
-	FEAT_EXP_ATTACH_TYPE,
-	/* bpf_probe_read_{kernel,user}[_str] helpers */
-	FEAT_PROBE_READ_KERN,
-	/* BPF_PROG_BIND_MAP is supported */
-	FEAT_PROG_BIND_MAP,
-	/* Kernel support for module BTFs */
-	FEAT_MODULE_BTF,
-	/* BTF_KIND_FLOAT support */
-	FEAT_BTF_FLOAT,
-	/* BPF perf link support */
-	FEAT_PERF_LINK,
-	/* BTF_KIND_DECL_TAG support */
-	FEAT_BTF_DECL_TAG,
-	/* BTF_KIND_TYPE_TAG support */
-	FEAT_BTF_TYPE_TAG,
-	/* memcg-based accounting for BPF maps and progs */
-	FEAT_MEMCG_ACCOUNT,
-	/* BPF cookie (bpf_get_attach_cookie() BPF helper) support */
-	FEAT_BPF_COOKIE,
-	/* BTF_KIND_ENUM64 support and BTF_KIND_ENUM kflag support */
-	FEAT_BTF_ENUM64,
-	/* Kernel uses syscall wrapper (CONFIG_ARCH_HAS_SYSCALL_WRAPPER) */
-	FEAT_SYSCALL_WRAPPER,
-	__FEAT_CNT,
-};
-
-int probe_memcg_account(void);
-bool kernel_supports(const struct bpf_object *obj, enum kern_feature_id feat_id);
-int bump_rlimit_memlock(void);
 
 int parse_cpu_mask_str(const char *s, bool **mask, int *mask_sz);
 int parse_cpu_mask_file(const char *fcpu, bool **mask, int *mask_sz);
 int libbpf__load_raw_btf(const char *raw_types, size_t types_len,
 			 const char *str_sec, size_t str_len);
-int btf_load_into_kernel(struct btf *btf, char *log_buf, size_t log_sz, __u32 log_level);
 
-struct btf *btf_get_from_fd(int btf_fd, struct btf *base_btf);
-void btf_get_kernel_prefix_kind(enum bpf_attach_type attach_type,
-				const char **prefix, int *kind);
+int bpf_object__section_size(const struct bpf_object *obj, const char *name,
+			     __u32 *size);
+int bpf_object__variable_offset(const struct bpf_object *obj, const char *name,
+				__u32 *off);
+
+struct nlattr;
+typedef int (*libbpf_dump_nlmsg_t)(void *cookie, void *msg, struct nlattr **tb);
+int libbpf_netlink_open(unsigned int *nl_pid);
+int libbpf_nl_get_link(int sock, unsigned int nl_pid,
+		       libbpf_dump_nlmsg_t dump_link_nlmsg, void *cookie);
+int libbpf_nl_get_class(int sock, unsigned int nl_pid, int ifindex,
+			libbpf_dump_nlmsg_t dump_class_nlmsg, void *cookie);
+int libbpf_nl_get_qdisc(int sock, unsigned int nl_pid, int ifindex,
+			libbpf_dump_nlmsg_t dump_qdisc_nlmsg, void *cookie);
+int libbpf_nl_get_filter(int sock, unsigned int nl_pid, int ifindex, int handle,
+			 libbpf_dump_nlmsg_t dump_filter_nlmsg, void *cookie);
 
 struct btf_ext_info {
 	/*
@@ -379,13 +125,6 @@ struct btf_ext_info {
 	void *info;
 	__u32 rec_size;
 	__u32 len;
-	/* optional (maintained internally by libbpf) mapping between .BTF.ext
-	 * section and corresponding ELF section. This is used to join
-	 * information like CO-RE relocation records with corresponding BPF
-	 * programs defined in ELF sections
-	 */
-	__u32 *sec_idxs;
-	int sec_cnt;
 };
 
 #define for_each_btf_ext_sec(seg, sec)					\
@@ -399,44 +138,6 @@ struct btf_ext_info {
 	     i < (sec)->num_info;					\
 	     i++, rec = (void *)rec + (seg)->rec_size)
 
-/*
- * The .BTF.ext ELF section layout defined as
- *   struct btf_ext_header
- *   func_info subsection
- *
- * The func_info subsection layout:
- *   record size for struct bpf_func_info in the func_info subsection
- *   struct btf_sec_func_info for section #1
- *   a list of bpf_func_info records for section #1
- *     where struct bpf_func_info mimics one in include/uapi/linux/bpf.h
- *     but may not be identical
- *   struct btf_sec_func_info for section #2
- *   a list of bpf_func_info records for section #2
- *   ......
- *
- * Note that the bpf_func_info record size in .BTF.ext may not
- * be the same as the one defined in include/uapi/linux/bpf.h.
- * The loader should ensure that record_size meets minimum
- * requirement and pass the record as is to the kernel. The
- * kernel will handle the func_info properly based on its contents.
- */
-struct btf_ext_header {
-	__u16	magic;
-	__u8	version;
-	__u8	flags;
-	__u32	hdr_len;
-
-	/* All offsets are in bytes relative to the end of this header */
-	__u32	func_info_off;
-	__u32	func_info_len;
-	__u32	line_info_off;
-	__u32	line_info_len;
-
-	/* optional part of .BTF.ext header */
-	__u32	core_relo_off;
-	__u32	core_relo_len;
-};
-
 struct btf_ext {
 	union {
 		struct btf_ext_header *hdr;
@@ -444,7 +145,7 @@ struct btf_ext {
 	};
 	struct btf_ext_info func_info;
 	struct btf_ext_info line_info;
-	struct btf_ext_info core_relo_info;
+	struct btf_ext_info field_reloc_info;
 	__u32 data_size;
 };
 
@@ -469,111 +170,67 @@ struct bpf_line_info_min {
 	__u32	line_col;
 };
 
-
-typedef int (*type_id_visit_fn)(__u32 *type_id, void *ctx);
-typedef int (*str_off_visit_fn)(__u32 *str_off, void *ctx);
-int btf_type_visit_type_ids(struct btf_type *t, type_id_visit_fn visit, void *ctx);
-int btf_type_visit_str_offs(struct btf_type *t, str_off_visit_fn visit, void *ctx);
-int btf_ext_visit_type_ids(struct btf_ext *btf_ext, type_id_visit_fn visit, void *ctx);
-int btf_ext_visit_str_offs(struct btf_ext *btf_ext, str_off_visit_fn visit, void *ctx);
-__s32 btf__find_by_name_kind_own(const struct btf *btf, const char *type_name,
-				 __u32 kind);
-
-typedef int (*kallsyms_cb_t)(unsigned long long sym_addr, char sym_type,
-			     const char *sym_name, void *ctx);
-
-int libbpf_kallsyms_parse(kallsyms_cb_t cb, void *arg);
-
-/* handle direct returned errors */
-static inline int libbpf_err(int ret)
-{
-	if (ret < 0)
-		errno = -ret;
-	return ret;
-}
-
-/* handle errno-based (e.g., syscall or libc) errors according to libbpf's
- * strict mode settings
+/* bpf_field_info_kind encodes which aspect of captured field has to be
+ * adjusted by relocations. Currently supported values are:
+ *   - BPF_FIELD_BYTE_OFFSET: field offset (in bytes);
+ *   - BPF_FIELD_EXISTS: field existence (1, if field exists; 0, otherwise);
  */
-static inline int libbpf_err_errno(int ret)
-{
-	/* errno is already assumed to be set on error */
-	return ret < 0 ? -errno : ret;
-}
+enum bpf_field_info_kind {
+	BPF_FIELD_BYTE_OFFSET = 0,	/* field byte offset */
+	BPF_FIELD_BYTE_SIZE = 1,
+	BPF_FIELD_EXISTS = 2,		/* field existence in target kernel */
+	BPF_FIELD_SIGNED = 3,
+	BPF_FIELD_LSHIFT_U64 = 4,
+	BPF_FIELD_RSHIFT_U64 = 5,
+};
 
-/* handle error for pointer-returning APIs, err is assumed to be < 0 always */
-static inline void *libbpf_err_ptr(int err)
-{
-	/* set errno on error, this doesn't break anything */
-	errno = -err;
-	return NULL;
-}
-
-/* handle pointer-returning APIs' error handling */
-static inline void *libbpf_ptr(void *ret)
-{
-	/* set errno on error, this doesn't break anything */
-	if (IS_ERR(ret))
-		errno = -PTR_ERR(ret);
-
-	return IS_ERR(ret) ? NULL : ret;
-}
-
-static inline bool str_is_empty(const char *s)
-{
-	return !s || !s[0];
-}
-
-static inline bool is_ldimm64_insn(struct bpf_insn *insn)
-{
-	return insn->code == (BPF_LD | BPF_IMM | BPF_DW);
-}
-
-/* if fd is stdin, stdout, or stderr, dup to a fd greater than 2
- * Takes ownership of the fd passed in, and closes it if calling
- * fcntl(fd, F_DUPFD_CLOEXEC, 3).
+/* The minimum bpf_field_reloc checked by the loader
+ *
+ * Field relocation captures the following data:
+ * - insn_off - instruction offset (in bytes) within a BPF program that needs
+ *   its insn->imm field to be relocated with actual field info;
+ * - type_id - BTF type ID of the "root" (containing) entity of a relocatable
+ *   field;
+ * - access_str_off - offset into corresponding .BTF string section. String
+ *   itself encodes an accessed field using a sequence of field and array
+ *   indicies, separated by colon (:). It's conceptually very close to LLVM's
+ *   getelementptr ([0]) instruction's arguments for identifying offset to 
+ *   a field.
+ *
+ * Example to provide a better feel.
+ *
+ *   struct sample {
+ *       int a;
+ *       struct {
+ *           int b[10];
+ *       };
+ *   };
+ *
+ *   struct sample *s = ...;
+ *   int x = &s->a;     // encoded as "0:0" (a is field #0)
+ *   int y = &s->b[5];  // encoded as "0:1:0:5" (anon struct is field #1, 
+ *                      // b is field #0 inside anon struct, accessing elem #5)
+ *   int z = &s[10]->b; // encoded as "10:1" (ptr is used as an array)
+ *
+ * type_id for all relocs in this example  will capture BTF type id of
+ * `struct sample`.
+ *
+ * Such relocation is emitted when using __builtin_preserve_access_index()
+ * Clang built-in, passing expression that captures field address, e.g.:
+ *
+ * bpf_probe_read(&dst, sizeof(dst),
+ *		  __builtin_preserve_access_index(&src->a.b.c));
+ *
+ * In this case Clang will emit field relocation recording necessary data to
+ * be able to find offset of embedded `a.b.c` field within `src` struct.
+ *
+ *   [0] https://llvm.org/docs/LangRef.html#getelementptr-instruction
  */
-static inline int ensure_good_fd(int fd)
-{
-	int old_fd = fd, saved_errno;
-
-	if (fd < 0)
-		return fd;
-	if (fd < 3) {
-		fd = fcntl(fd, F_DUPFD_CLOEXEC, 3);
-		saved_errno = errno;
-		close(old_fd);
-		if (fd < 0) {
-			pr_warn("failed to dup FD %d to FD > 2: %d\n", old_fd, -saved_errno);
-			errno = saved_errno;
-		}
-	}
-	return fd;
-}
-
-/* The following two functions are exposed to bpftool */
-int bpf_core_add_cands(struct bpf_core_cand *local_cand,
-		       size_t local_essent_len,
-		       const struct btf *targ_btf,
-		       const char *targ_btf_name,
-		       int targ_start_id,
-		       struct bpf_core_cand_list *cands);
-void bpf_core_free_cands(struct bpf_core_cand_list *cands);
-
-struct usdt_manager *usdt_manager_new(struct bpf_object *obj);
-void usdt_manager_free(struct usdt_manager *man);
-struct bpf_link * usdt_manager_attach_usdt(struct usdt_manager *man,
-					   const struct bpf_program *prog,
-					   pid_t pid, const char *path,
-					   const char *usdt_provider, const char *usdt_name,
-					   __u64 usdt_cookie);
-
-static inline bool is_pow_of_2(size_t x)
-{
-	return x && (x & (x - 1)) == 0;
-}
-
-#define PROG_LOAD_ATTEMPTS 5
-int sys_bpf_prog_load(union bpf_attr *attr, unsigned int size, int attempts);
+struct bpf_field_reloc {
+	__u32   insn_off;
+	__u32   type_id;
+	__u32   access_str_off;
+	enum bpf_field_info_kind kind;
+};
 
 #endif /* __LIBBPF_LIBBPF_INTERNAL_H */

src/libbpf_legacy.h

@@ -1,140 +0,0 @@
-/* SPDX-License-Identifier: (LGPL-2.1 OR BSD-2-Clause) */
-
-/*
- * Libbpf legacy APIs (either discouraged or deprecated, as mentioned in [0])
- *
- *   [0] https://docs.google.com/document/d/1UyjTZuPFWiPFyKk1tV5an11_iaRuec6U-ZESZ54nNTY
- *
- * Copyright (C) 2021 Facebook
- */
-#ifndef __LIBBPF_LEGACY_BPF_H
-#define __LIBBPF_LEGACY_BPF_H
-
-#include <linux/bpf.h>
-#include <stdbool.h>
-#include <stddef.h>
-#include <stdint.h>
-#include "libbpf_common.h"
-
-#ifdef __cplusplus
-extern "C" {
-#endif
-
-/* As of libbpf 1.0 libbpf_set_strict_mode() and enum libbpf_struct_mode have
- * no effect. But they are left in libbpf_legacy.h so that applications that
- * prepared for libbpf 1.0 before final release by using
- * libbpf_set_strict_mode() still work with libbpf 1.0+ without any changes.
- */
-enum libbpf_strict_mode {
-	/* Turn on all supported strict features of libbpf to simulate libbpf
-	 * v1.0 behavior.
-	 * This will be the default behavior in libbpf v1.0.
-	 */
-	LIBBPF_STRICT_ALL = 0xffffffff,
-
-	/*
-	 * Disable any libbpf 1.0 behaviors. This is the default before libbpf
-	 * v1.0. It won't be supported anymore in v1.0, please update your
-	 * code so that it handles LIBBPF_STRICT_ALL mode before libbpf v1.0.
-	 */
-	LIBBPF_STRICT_NONE = 0x00,
-	/*
-	 * Return NULL pointers on error, not ERR_PTR(err).
-	 * Additionally, libbpf also always sets errno to corresponding Exx
-	 * (positive) error code.
-	 */
-	LIBBPF_STRICT_CLEAN_PTRS = 0x01,
-	/*
-	 * Return actual error codes from low-level APIs directly, not just -1.
-	 * Additionally, libbpf also always sets errno to corresponding Exx
-	 * (positive) error code.
-	 */
-	LIBBPF_STRICT_DIRECT_ERRS = 0x02,
-	/*
-	 * Enforce strict BPF program section (SEC()) names.
-	 * E.g., while prefiously SEC("xdp_whatever") or SEC("perf_event_blah") were
-	 * allowed, with LIBBPF_STRICT_SEC_PREFIX this will become
-	 * unrecognized by libbpf and would have to be just SEC("xdp") and
-	 * SEC("xdp") and SEC("perf_event").
-	 *
-	 * Note, in this mode the program pin path will be based on the
-	 * function name instead of section name.
-	 *
-	 * Additionally, routines in the .text section are always considered
-	 * sub-programs. Legacy behavior allows for a single routine in .text
-	 * to be a program.
-	 */
-	LIBBPF_STRICT_SEC_NAME = 0x04,
-	/*
-	 * Disable the global 'bpf_objects_list'. Maintaining this list adds
-	 * a race condition to bpf_object__open() and bpf_object__close().
-	 * Clients can maintain it on their own if it is valuable for them.
-	 */
-	LIBBPF_STRICT_NO_OBJECT_LIST = 0x08,
-	/*
-	 * Automatically bump RLIMIT_MEMLOCK using setrlimit() before the
-	 * first BPF program or map creation operation. This is done only if
-	 * kernel is too old to support memcg-based memory accounting for BPF
-	 * subsystem. By default, RLIMIT_MEMLOCK limit is set to RLIM_INFINITY,
-	 * but it can be overriden with libbpf_set_memlock_rlim() API.
-	 * Note that libbpf_set_memlock_rlim() needs to be called before
-	 * the very first bpf_prog_load(), bpf_map_create() or bpf_object__load()
-	 * operation.
-	 */
-	LIBBPF_STRICT_AUTO_RLIMIT_MEMLOCK = 0x10,
-	/*
-	 * Error out on any SEC("maps") map definition, which are deprecated
-	 * in favor of BTF-defined map definitions in SEC(".maps").
-	 */
-	LIBBPF_STRICT_MAP_DEFINITIONS = 0x20,
-
-	__LIBBPF_STRICT_LAST,
-};
-
-LIBBPF_API int libbpf_set_strict_mode(enum libbpf_strict_mode mode);
-
-/**
- * @brief **libbpf_get_error()** extracts the error code from the passed
- * pointer
- * @param ptr pointer returned from libbpf API function
- * @return error code; or 0 if no error occured
- *
- * Note, as of libbpf 1.0 this function is not necessary and not recommended
- * to be used. Libbpf doesn't return error code embedded into the pointer
- * itself. Instead, NULL is returned on error and error code is passed through
- * thread-local errno variable. **libbpf_get_error()** is just returning -errno
- * value if it receives NULL, which is correct only if errno hasn't been
- * modified between libbpf API call and corresponding **libbpf_get_error()**
- * call. Prefer to check return for NULL and use errno directly.
- *
- * This API is left in libbpf 1.0 to allow applications that were 1.0-ready
- * before final libbpf 1.0 without needing to change them.
- */
-LIBBPF_API long libbpf_get_error(const void *ptr);
-
-#define DECLARE_LIBBPF_OPTS LIBBPF_OPTS
-
-/* "Discouraged" APIs which don't follow consistent libbpf naming patterns.
- * They are normally a trivial aliases or wrappers for proper APIs and are
- * left to minimize unnecessary disruption for users of libbpf. But they
- * shouldn't be used going forward.
- */
-
-struct bpf_program;
-struct bpf_map;
-struct btf;
-struct btf_ext;
-
-LIBBPF_API struct btf *libbpf_find_kernel_btf(void);
-
-LIBBPF_API enum bpf_prog_type bpf_program__get_type(const struct bpf_program *prog);
-LIBBPF_API enum bpf_attach_type bpf_program__get_expected_attach_type(const struct bpf_program *prog);
-LIBBPF_API const char *bpf_map__get_pin_path(const struct bpf_map *map);
-LIBBPF_API const void *btf__get_raw_data(const struct btf *btf, __u32 *size);
-LIBBPF_API const void *btf_ext__get_raw_data(const struct btf_ext *btf_ext, __u32 *size);
-
-#ifdef __cplusplus
-} /* extern "C" */
-#endif
-
-#endif /* __LIBBPF_LEGACY_BPF_H */

src/libbpf_probes.c

@@ -17,63 +17,69 @@
 #include "libbpf.h"
 #include "libbpf_internal.h"
 
-static int probe_prog_load(enum bpf_prog_type prog_type,
-			   const struct bpf_insn *insns, size_t insns_cnt,
-			   char *log_buf, size_t log_buf_sz)
+/* make sure libbpf doesn't use kernel-only integer typedefs */
+#pragma GCC poison u8 u16 u32 u64 s8 s16 s32 s64
+
+static bool grep(const char *buffer, const char *pattern)
 {
-	LIBBPF_OPTS(bpf_prog_load_opts, opts,
-		.log_buf = log_buf,
-		.log_size = log_buf_sz,
-		.log_level = log_buf ? 1 : 0,
-	);
-	int fd, err, exp_err = 0;
-	const char *exp_msg = NULL;
-	char buf[4096];
+	return !!strstr(buffer, pattern);
+}
+
+static int get_vendor_id(int ifindex)
+{
+	char ifname[IF_NAMESIZE], path[64], buf[8];
+	ssize_t len;
+	int fd;
+
+	if (!if_indextoname(ifindex, ifname))
+		return -1;
+
+	snprintf(path, sizeof(path), "/sys/class/net/%s/device/vendor", ifname);
+
+	fd = open(path, O_RDONLY);
+	if (fd < 0)
+		return -1;
+
+	len = read(fd, buf, sizeof(buf));
+	close(fd);
+	if (len < 0)
+		return -1;
+	if (len >= (ssize_t)sizeof(buf))
+		return -1;
+	buf[len] = '\0';
+
+	return strtol(buf, NULL, 0);
+}
+
+static int get_kernel_version(void)
+{
+	int version, subversion, patchlevel;
+	struct utsname utsn;
+
+	/* Return 0 on failure, and attempt to probe with empty kversion */
+	if (uname(&utsn))
+		return 0;
+
+	if (sscanf(utsn.release, "%d.%d.%d",
+		   &version, &subversion, &patchlevel) != 3)
+		return 0;
+
+	return (version << 16) + (subversion << 8) + patchlevel;
+}
+
+static void
+probe_load(enum bpf_prog_type prog_type, const struct bpf_insn *insns,
+	   size_t insns_cnt, char *buf, size_t buf_len, __u32 ifindex)
+{
+	struct bpf_load_program_attr xattr = {};
+	int fd;
 
 	switch (prog_type) {
 	case BPF_PROG_TYPE_CGROUP_SOCK_ADDR:
-		opts.expected_attach_type = BPF_CGROUP_INET4_CONNECT;
-		break;
-	case BPF_PROG_TYPE_CGROUP_SOCKOPT:
-		opts.expected_attach_type = BPF_CGROUP_GETSOCKOPT;
-		break;
-	case BPF_PROG_TYPE_SK_LOOKUP:
-		opts.expected_attach_type = BPF_SK_LOOKUP;
+		xattr.expected_attach_type = BPF_CGROUP_INET4_CONNECT;
 		break;
 	case BPF_PROG_TYPE_KPROBE:
-		opts.kern_version = get_kernel_version();
-		break;
-	case BPF_PROG_TYPE_LIRC_MODE2:
-		opts.expected_attach_type = BPF_LIRC_MODE2;
-		break;
-	case BPF_PROG_TYPE_TRACING:
-	case BPF_PROG_TYPE_LSM:
-		opts.log_buf = buf;
-		opts.log_size = sizeof(buf);
-		opts.log_level = 1;
-		if (prog_type == BPF_PROG_TYPE_TRACING)
-			opts.expected_attach_type = BPF_TRACE_FENTRY;
-		else
-			opts.expected_attach_type = BPF_MODIFY_RETURN;
-		opts.attach_btf_id = 1;
-
-		exp_err = -EINVAL;
-		exp_msg = "attach_btf_id 1 is not a function";
-		break;
-	case BPF_PROG_TYPE_EXT:
-		opts.log_buf = buf;
-		opts.log_size = sizeof(buf);
-		opts.log_level = 1;
-		opts.attach_btf_id = 1;
-
-		exp_err = -EINVAL;
-		exp_msg = "Cannot replace kernel functions";
-		break;
-	case BPF_PROG_TYPE_SYSCALL:
-		opts.prog_flags = BPF_F_SLEEPABLE;
-		break;
-	case BPF_PROG_TYPE_STRUCT_OPS:
-		exp_err = -524; /* -ENOTSUPP */
+		xattr.kern_version = get_kernel_version();
 		break;
 	case BPF_PROG_TYPE_UNSPEC:
 	case BPF_PROG_TYPE_SOCKET_FILTER:
@@ -94,42 +100,45 @@ static int probe_prog_load(enum bpf_prog_type prog_type,
 	case BPF_PROG_TYPE_RAW_TRACEPOINT:
 	case BPF_PROG_TYPE_RAW_TRACEPOINT_WRITABLE:
 	case BPF_PROG_TYPE_LWT_SEG6LOCAL:
+	case BPF_PROG_TYPE_LIRC_MODE2:
 	case BPF_PROG_TYPE_SK_REUSEPORT:
 	case BPF_PROG_TYPE_FLOW_DISSECTOR:
 	case BPF_PROG_TYPE_CGROUP_SYSCTL:
-		break;
+	case BPF_PROG_TYPE_CGROUP_SOCKOPT:
+	case BPF_PROG_TYPE_TRACING:
+	case BPF_PROG_TYPE_STRUCT_OPS:
+	case BPF_PROG_TYPE_EXT:
+	case BPF_PROG_TYPE_LSM:
 	default:
-		return -EOPNOTSUPP;
+		break;
 	}
 
-	fd = bpf_prog_load(prog_type, NULL, "GPL", insns, insns_cnt, &opts);
-	err = -errno;
+	xattr.prog_type = prog_type;
+	xattr.insns = insns;
+	xattr.insns_cnt = insns_cnt;
+	xattr.license = "GPL";
+	xattr.prog_ifindex = ifindex;
+
+	fd = bpf_load_program_xattr(&xattr, buf, buf_len);
 	if (fd >= 0)
 		close(fd);
-	if (exp_err) {
-		if (fd >= 0 || err != exp_err)
-			return 0;
-		if (exp_msg && !strstr(buf, exp_msg))
-			return 0;
-		return 1;
-	}
-	return fd >= 0 ? 1 : 0;
 }
 
-int libbpf_probe_bpf_prog_type(enum bpf_prog_type prog_type, const void *opts)
+bool bpf_probe_prog_type(enum bpf_prog_type prog_type, __u32 ifindex)
 {
-	struct bpf_insn insns[] = {
+	struct bpf_insn insns[2] = {
 		BPF_MOV64_IMM(BPF_REG_0, 0),
 		BPF_EXIT_INSN()
 	};
-	const size_t insn_cnt = ARRAY_SIZE(insns);
-	int ret;
 
-	if (opts)
-		return libbpf_err(-EINVAL);
+	if (ifindex && prog_type == BPF_PROG_TYPE_SCHED_CLS)
+		/* nfp returns -EINVAL on exit(0) with TC offload */
+		insns[0].imm = 2;
 
-	ret = probe_prog_load(prog_type, insns, insn_cnt, NULL, 0);
-	return libbpf_err(ret);
+	errno = 0;
+	probe_load(prog_type, insns, ARRAY_SIZE(insns), NULL, 0, ifindex);
+
+	return errno != EINVAL && errno != EOPNOTSUPP;
 }
 
 int libbpf__load_raw_btf(const char *raw_types, size_t types_len,
@@ -155,13 +164,13 @@ int libbpf__load_raw_btf(const char *raw_types, size_t types_len,
 	memcpy(raw_btf + hdr.hdr_len, raw_types, hdr.type_len);
 	memcpy(raw_btf + hdr.hdr_len + hdr.type_len, str_sec, hdr.str_len);
 
-	btf_fd = bpf_btf_load(raw_btf, btf_len, NULL);
+	btf_fd = bpf_load_btf(raw_btf, btf_len, NULL, 0, false);
 
 	free(raw_btf);
 	return btf_fd;
 }
 
-static int load_local_storage_btf(void)
+static int load_sk_storage_btf(void)
 {
 	const char strs[] = "\0bpf_spin_lock\0val\0cnt\0l";
 	/* struct bpf_spin_lock {
@@ -188,16 +197,17 @@ static int load_local_storage_btf(void)
 				     strs, sizeof(strs));
 }
 
-static int probe_map_create(enum bpf_map_type map_type)
+bool bpf_probe_map_type(enum bpf_map_type map_type, __u32 ifindex)
 {
-	LIBBPF_OPTS(bpf_map_create_opts, opts);
-	int key_size, value_size, max_entries;
+	int key_size, value_size, max_entries, map_flags;
 	__u32 btf_key_type_id = 0, btf_value_type_id = 0;
-	int fd = -1, btf_fd = -1, fd_inner = -1, exp_err = 0, err = 0;
+	struct bpf_create_map_attr attr = {};
+	int fd = -1, btf_fd = -1, fd_inner;
 
 	key_size	= sizeof(__u32);
 	value_size	= sizeof(__u32);
 	max_entries	= 1;
+	map_flags	= 0;
 
 	switch (map_type) {
 	case BPF_MAP_TYPE_STACK_TRACE:
@@ -206,7 +216,7 @@ static int probe_map_create(enum bpf_map_type map_type)
 	case BPF_MAP_TYPE_LPM_TRIE:
 		key_size	= sizeof(__u64);
 		value_size	= sizeof(__u64);
-		opts.map_flags	= BPF_F_NO_PREALLOC;
+		map_flags	= BPF_F_NO_PREALLOC;
 		break;
 	case BPF_MAP_TYPE_CGROUP_STORAGE:
 	case BPF_MAP_TYPE_PERCPU_CGROUP_STORAGE:
@@ -219,32 +229,21 @@ static int probe_map_create(enum bpf_map_type map_type)
 		key_size	= 0;
 		break;
 	case BPF_MAP_TYPE_SK_STORAGE:
-	case BPF_MAP_TYPE_INODE_STORAGE:
-	case BPF_MAP_TYPE_TASK_STORAGE:
 		btf_key_type_id = 1;
 		btf_value_type_id = 3;
 		value_size = 8;
 		max_entries = 0;
-		opts.map_flags = BPF_F_NO_PREALLOC;
-		btf_fd = load_local_storage_btf();
+		map_flags = BPF_F_NO_PREALLOC;
+		btf_fd = load_sk_storage_btf();
 		if (btf_fd < 0)
-			return btf_fd;
+			return false;
 		break;
 	case BPF_MAP_TYPE_RINGBUF:
-	case BPF_MAP_TYPE_USER_RINGBUF:
 		key_size = 0;
 		value_size = 0;
 		max_entries = 4096;
 		break;
-	case BPF_MAP_TYPE_STRUCT_OPS:
-		/* we'll get -ENOTSUPP for invalid BTF type ID for struct_ops */
-		opts.btf_vmlinux_value_type_id = 1;
-		exp_err = -524; /* -ENOTSUPP */
-		break;
-	case BPF_MAP_TYPE_BLOOM_FILTER:
-		key_size = 0;
-		max_entries = 1;
-		break;
+	case BPF_MAP_TYPE_UNSPEC:
 	case BPF_MAP_TYPE_HASH:
 	case BPF_MAP_TYPE_ARRAY:
 	case BPF_MAP_TYPE_PROG_ARRAY:
@@ -263,101 +262,95 @@ static int probe_map_create(enum bpf_map_type map_type)
 	case BPF_MAP_TYPE_XSKMAP:
 	case BPF_MAP_TYPE_SOCKHASH:
 	case BPF_MAP_TYPE_REUSEPORT_SOCKARRAY:
-		break;
-	case BPF_MAP_TYPE_UNSPEC:
+	case BPF_MAP_TYPE_STRUCT_OPS:
 	default:
-		return -EOPNOTSUPP;
+		break;
 	}
 
 	if (map_type == BPF_MAP_TYPE_ARRAY_OF_MAPS ||
 	    map_type == BPF_MAP_TYPE_HASH_OF_MAPS) {
-		fd_inner = bpf_map_create(BPF_MAP_TYPE_HASH, NULL,
-					  sizeof(__u32), sizeof(__u32), 1, NULL);
+		/* TODO: probe for device, once libbpf has a function to create
+		 * map-in-map for offload
+		 */
+		if (ifindex)
+			return false;
+
+		fd_inner = bpf_create_map(BPF_MAP_TYPE_HASH,
+					  sizeof(__u32), sizeof(__u32), 1, 0);
 		if (fd_inner < 0)
-			goto cleanup;
+			return false;
+		fd = bpf_create_map_in_map(map_type, NULL, sizeof(__u32),
+					   fd_inner, 1, 0);
+		close(fd_inner);
+	} else {
+		/* Note: No other restriction on map type probes for offload */
+		attr.map_type = map_type;
+		attr.key_size = key_size;
+		attr.value_size = value_size;
+		attr.max_entries = max_entries;
+		attr.map_flags = map_flags;
+		attr.map_ifindex = ifindex;
+		if (btf_fd >= 0) {
+			attr.btf_fd = btf_fd;
+			attr.btf_key_type_id = btf_key_type_id;
+			attr.btf_value_type_id = btf_value_type_id;
+		}
 
-		opts.inner_map_fd = fd_inner;
+		fd = bpf_create_map_xattr(&attr);
 	}
-
-	if (btf_fd >= 0) {
-		opts.btf_fd = btf_fd;
-		opts.btf_key_type_id = btf_key_type_id;
-		opts.btf_value_type_id = btf_value_type_id;
-	}
-
-	fd = bpf_map_create(map_type, NULL, key_size, value_size, max_entries, &opts);
-	err = -errno;
-
-cleanup:
 	if (fd >= 0)
 		close(fd);
-	if (fd_inner >= 0)
-		close(fd_inner);
 	if (btf_fd >= 0)
 		close(btf_fd);
 
-	if (exp_err)
-		return fd < 0 && err == exp_err ? 1 : 0;
-	else
-		return fd >= 0 ? 1 : 0;
+	return fd >= 0;
 }
 
-int libbpf_probe_bpf_map_type(enum bpf_map_type map_type, const void *opts)
+bool bpf_probe_helper(enum bpf_func_id id, enum bpf_prog_type prog_type,
+		      __u32 ifindex)
 {
-	int ret;
-
-	if (opts)
-		return libbpf_err(-EINVAL);
-
-	ret = probe_map_create(map_type);
-	return libbpf_err(ret);
-}
-
-int libbpf_probe_bpf_helper(enum bpf_prog_type prog_type, enum bpf_func_id helper_id,
-			    const void *opts)
-{
-	struct bpf_insn insns[] = {
-		BPF_EMIT_CALL((__u32)helper_id),
-		BPF_EXIT_INSN(),
+	struct bpf_insn insns[2] = {
+		BPF_EMIT_CALL(id),
+		BPF_EXIT_INSN()
 	};
-	const size_t insn_cnt = ARRAY_SIZE(insns);
-	char buf[4096];
-	int ret;
+	char buf[4096] = {};
+	bool res;
 
-	if (opts)
-		return libbpf_err(-EINVAL);
+	probe_load(prog_type, insns, ARRAY_SIZE(insns), buf, sizeof(buf),
+		   ifindex);
+	res = !grep(buf, "invalid func ") && !grep(buf, "unknown func ");
 
-	/* we can't successfully load all prog types to check for BPF helper
-	 * support, so bail out with -EOPNOTSUPP error
-	 */
-	switch (prog_type) {
-	case BPF_PROG_TYPE_TRACING:
-	case BPF_PROG_TYPE_EXT:
-	case BPF_PROG_TYPE_LSM:
-	case BPF_PROG_TYPE_STRUCT_OPS:
-		return -EOPNOTSUPP;
-	default:
-		break;
+	if (ifindex) {
+		switch (get_vendor_id(ifindex)) {
+		case 0x19ee: /* Netronome specific */
+			res = res && !grep(buf, "not supported by FW") &&
+				!grep(buf, "unsupported function id");
+			break;
+		default:
+			break;
+		}
 	}
 
-	buf[0] = '\0';
-	ret = probe_prog_load(prog_type, insns, insn_cnt, buf, sizeof(buf));
-	if (ret < 0)
-		return libbpf_err(ret);
-
-	/* If BPF verifier doesn't recognize BPF helper ID (enum bpf_func_id)
-	 * at all, it will emit something like "invalid func unknown#181".
-	 * If BPF verifier recognizes BPF helper but it's not supported for
-	 * given BPF program type, it will emit "unknown func bpf_sys_bpf#166".
-	 * In both cases, provided combination of BPF program type and BPF
-	 * helper is not supported by the kernel.
-	 * In all other cases, probe_prog_load() above will either succeed (e.g.,
-	 * because BPF helper happens to accept no input arguments or it
-	 * accepts one input argument and initial PTR_TO_CTX is fine for
-	 * that), or we'll get some more specific BPF verifier error about
-	 * some unsatisfied conditions.
-	 */
-	if (ret == 0 && (strstr(buf, "invalid func ") || strstr(buf, "unknown func ")))
-		return 0;
-	return 1; /* assume supported */
+	return res;
+}
+
+/*
+ * Probe for availability of kernel commit (5.3):
+ *
+ * c04c0d2b968a ("bpf: increase complexity limit and maximum program size")
+ */
+bool bpf_probe_large_insn_limit(__u32 ifindex)
+{
+	struct bpf_insn insns[BPF_MAXINSNS + 1];
+	int i;
+
+	for (i = 0; i < BPF_MAXINSNS; i++)
+		insns[i] = BPF_MOV64_IMM(BPF_REG_0, 1);
+	insns[BPF_MAXINSNS] = BPF_EXIT_INSN();
+
+	errno = 0;
+	probe_load(BPF_PROG_TYPE_SCHED_CLS, insns, ARRAY_SIZE(insns), NULL, 0,
+		   ifindex);
+
+	return errno != E2BIG && errno != EINVAL;
 }

src/libbpf_util.h

@@ -0,0 +1,47 @@
+/* SPDX-License-Identifier: (LGPL-2.1 OR BSD-2-Clause) */
+/* Copyright (c) 2019 Facebook */
+
+#ifndef __LIBBPF_LIBBPF_UTIL_H
+#define __LIBBPF_LIBBPF_UTIL_H
+
+#include <stdbool.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/* Use these barrier functions instead of smp_[rw]mb() when they are
+ * used in a libbpf header file. That way they can be built into the
+ * application that uses libbpf.
+ */
+#if defined(__i386__) || defined(__x86_64__)
+# define libbpf_smp_rmb() asm volatile("" : : : "memory")
+# define libbpf_smp_wmb() asm volatile("" : : : "memory")
+# define libbpf_smp_mb() \
+	asm volatile("lock; addl $0,-4(%%rsp)" : : : "memory", "cc")
+/* Hinders stores to be observed before older loads. */
+# define libbpf_smp_rwmb() asm volatile("" : : : "memory")
+#elif defined(__aarch64__)
+# define libbpf_smp_rmb() asm volatile("dmb ishld" : : : "memory")
+# define libbpf_smp_wmb() asm volatile("dmb ishst" : : : "memory")
+# define libbpf_smp_mb() asm volatile("dmb ish" : : : "memory")
+# define libbpf_smp_rwmb() libbpf_smp_mb()
+#elif defined(__arm__)
+/* These are only valid for armv7 and above */
+# define libbpf_smp_rmb() asm volatile("dmb ish" : : : "memory")
+# define libbpf_smp_wmb() asm volatile("dmb ishst" : : : "memory")
+# define libbpf_smp_mb() asm volatile("dmb ish" : : : "memory")
+# define libbpf_smp_rwmb() libbpf_smp_mb()
+#else
+/* Architecture missing native barrier functions. */
+# define libbpf_smp_rmb() __sync_synchronize()
+# define libbpf_smp_wmb() __sync_synchronize()
+# define libbpf_smp_mb() __sync_synchronize()
+# define libbpf_smp_rwmb() __sync_synchronize()
+#endif
+
+#ifdef __cplusplus
+} /* extern "C" */
+#endif
+
+#endif

src/libbpf_version.h

@@ -1,9 +0,0 @@
-/* SPDX-License-Identifier: (LGPL-2.1 OR BSD-2-Clause) */
-/* Copyright (C) 2021 Facebook */
-#ifndef __LIBBPF_VERSION_H
-#define __LIBBPF_VERSION_H
-
-#define LIBBPF_MAJOR_VERSION 1
-#define LIBBPF_MINOR_VERSION 1
-
-#endif /* __LIBBPF_VERSION_H */