Add fallback to an old attaching method

.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 >> /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

@@ -1,35 +0,0 @@
-name: 'vmtest'
-description: 'Build + run vmtest'
-inputs:
-  kernel:
-    description: 'kernel version or LATEST'
-    required: true
-    default: 'LATEST'
-  kernel-rev:
-    description: 'CHECKPOINT or rev/tag/branch'
-    required: true
-    default: 'CHECKPOINT'
-  kernel-origin:
-    description: 'kernel repo'
-    required: true
-    default: 'https://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf-next.git'
-  pahole:
-    description: 'pahole rev/tag/branch'
-    required: true
-    default: 'master'
-  pahole-origin:
-    description: 'pahole repo'
-    required: true
-    default: 'https://git.kernel.org/pub/scm/devel/pahole/pahole.git'
-runs:
-  using: "composite"
-  steps:
-    - run: |
-        source /tmp/ci_setup
-        export KERNEL=${{ inputs.kernel }}
-        export KERNEL_BRANCH=${{ inputs.kernel-rev }}
-        export KERNEL_ORIGIN=${{ inputs.kernel-origin }}
-        export PAHOLE_BRANCH=${{ inputs.pahole }}
-        export PAHOLE_ORIGIN=${{ inputs.pahole-origin }}
-        $CI_ROOT/vmtest/run_vmtest.sh
-      shell: bash

.github/workflows/coverity.yml

@@ -1,30 +0,0 @@
-name: libbpf-ci-coverity
-
-on:
-  schedule:
-    - cron:  '0 18 * * *'
-
-
-jobs:
-  coverity:
-    runs-on: ubuntu-latest
-    name: Coverity
-    steps:
-      - uses: actions/checkout@v2
-      - uses: ./.github/actions/setup
-      - name: Run coverity
-        run: |
-          echo ::group::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}
-          echo ::endgroup::
-          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@v2
-      - 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@v2
-      - uses: ./.github/actions/setup
-      - uses: ./.github/actions/vmtest
-        with:
-          kernel: LATEST
-          pahole: $STAGING

.github/workflows/test.yml

@@ -1,100 +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: ubuntu-latest
-    name: Kernel ${{ matrix.kernel }} + selftests
-    strategy:
-      fail-fast: false
-      matrix:
-        include:
-          - kernel: 'LATEST'
-          - kernel: '5.5.0'
-          - kernel: '4.9.0'
-    steps:
-      - uses: actions/checkout@v2
-        name: Checkout
-      - uses: ./.github/actions/setup
-        name: Setup
-      - uses: ./.github/actions/vmtest
-        name: vmtest
-        with:
-          kernel: ${{ matrix.kernel }}
-
-  debian:
-    runs-on: ubuntu-latest
-    name: Debian Build (${{ 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@v2
-        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@v2
-        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

.readthedocs.yaml

@@ -1,17 +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
-
-# 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

@@ -1,6 +1,6 @@
 sudo: required
 language: bash
-dist: focal
+dist: bionic
 services:
     - docker
 
@@ -35,23 +35,8 @@ stages:
 
 jobs:
     include:
-        - stage: Builds & Tests
-          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
-
-        - name: Kernel 4.9.0 + selftests
-          language: bash
-          env: KERNEL=4.9.0
-          script:  $CI_ROOT/vmtest/run_vmtest.sh || travis_terminate 1
-
-        - name: Debian Build
+        - 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
@@ -75,37 +60,47 @@ jobs:
           script:         $CI_ROOT/managers/debian.sh RUN_CLANG_ASAN || travis_terminate 1
           after_script:   $CI_ROOT/managers/debian.sh CLEANUP
 
-        - name: Debian Build (gcc-10)
+        - name: Debian Build (gcc-8)
           language: bash
           install:        $CI_ROOT/managers/debian.sh SETUP
-          script:         $CI_ROOT/managers/debian.sh RUN_GCC10 || travis_terminate 1
+          script:         $CI_ROOT/managers/debian.sh RUN_GCC8 || travis_terminate 1
           after_script:   $CI_ROOT/managers/debian.sh CLEANUP
 
-        - name: Debian Build (gcc-10 ASan+UBSan)
+        - name: Debian Build (gcc-8 ASan+UBSan)
           language: bash
           install:        $CI_ROOT/managers/debian.sh SETUP
-          script:         $CI_ROOT/managers/debian.sh RUN_GCC10_ASAN || travis_terminate 1
+          script:         $CI_ROOT/managers/debian.sh RUN_GCC8_ASAN || travis_terminate 1
           after_script:   $CI_ROOT/managers/debian.sh CLEANUP
 
-        - name: Ubuntu Focal Build
+        - name: Ubuntu Bionic Build
           language: bash
           script: sudo $CI_ROOT/managers/ubuntu.sh || travis_terminate 1
 
-        - name: Ubuntu Focal Build (arm)
+        - name: Ubuntu Bionic Build (arm)
           arch: arm64
           language: bash
           script: sudo $CI_ROOT/managers/ubuntu.sh || travis_terminate 1
 
-        - name: Ubuntu Focal Build (s390x)
+        - name: Ubuntu Bionic Build (s390x)
           arch: s390x
           language: bash
           script: sudo $CI_ROOT/managers/ubuntu.sh || travis_terminate 1
 
-        - name: Ubuntu Focal Build (ppc64le)
+        - 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:
@@ -120,11 +115,9 @@ jobs:
               - COVERITY_SCAN_BUILD_COMMAND_PREPEND="cd src/"
               - COVERITY_SCAN_BUILD_COMMAND="make"
           install:
-              - sudo echo 'deb-src http://archive.ubuntu.com/ubuntu/ focal main restricted universe multiverse' >>/etc/apt/sources.list
+              - 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
-    allow_failures:
-        - env: KERNEL=x.x.x

BPF-CHECKPOINT-COMMIT

@@ -1 +1 @@
-8d6c414cd2fb74aa6812e9bfec6178f8246c4f3a
+4e15507fea70c0c312d79610efa46b6853ccf8e0

CHECKPOINT-COMMIT

@@ -1 +1 @@
-5319255b8df9271474bc9027cabf82253934f28d
+69119673bd50b176ded34032fadd41530fb5af21

README.md

@@ -1,38 +1,23 @@
-This is a mirror of [bpf-next Linux source
-tree](https://kernel.googlesource.com/pub/scm/linux/kernel/git/bpf/bpf-next)'s
+
+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.
 
-All the gory details of syncing can be found in `scripts/sync-kernel.sh`
-script.
+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`
 
-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.
-
-BPF/libbpf usage and questions
-==============================
-
-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.
-
-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.
+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
-[![Github Actions Builds & Tests](https://github.com/libbpf/libbpf/actions/workflows/test.yml/badge.svg)](https://github.com/libbpf/libbpf/actions/workflows/test.yml)
+[![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)
 =====
@@ -40,9 +25,8 @@ 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
@@ -73,23 +57,18 @@ 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/groovy/libbpf)
-  - [Alpine](https://pkgs.alpinelinux.org/packages?name=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).
+    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
@@ -110,9 +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:
@@ -132,16 +108,13 @@ 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 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

docs/.gitignore

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

docs/api.rst

@@ -1,51 +0,0 @@
-.. SPDX-License-Identifier: (LGPL-2.1 OR BSD-2-Clause)
-
-.. _api:
-
-.. toctree:: Table of Contents
-
-
-LIBBPF API
-==================
-
-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

@@ -1,22 +0,0 @@
-.. SPDX-License-Identifier: (LGPL-2.1 OR BSD-2-Clause)
-
-libbpf
-======
-
-For API documentation see the `versioned API documentation site <https://libbpf.readthedocs.io/en/latest/api.html>`_.
-
-.. toctree::
-   :maxdepth: 1
-
-   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

include/linux/filter.h

@@ -5,14 +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_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/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

@@ -43,7 +43,7 @@ struct btf_type {
 	 * "size" tells the size of the type it is describing.
 	 *
 	 * "type" is used by PTR, TYPEDEF, VOLATILE, CONST, RESTRICT,
-	 * FUNC, FUNC_PROTO, VAR and TAG.
+	 * FUNC, FUNC_PROTO and VAR.
 	 * "type" is a type_id referring to another type.
 	 */
 	union {
@@ -52,33 +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	*/
-	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_TAG		= 17,	/* Tag */
-
-	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.
@@ -174,15 +169,4 @@ struct btf_var_secinfo {
 	__u32	size;
 };
 
-/* BTF_KIND_TAG is followed by a single "struct btf_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_tag {
-       __s32   component_idx;
-};
-
 #endif /* _UAPI__LINUX_BTF_H__ */

include/uapi/linux/if_link.h

@@ -230,7 +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
 };
 
@@ -345,7 +344,6 @@ enum {
 	IFLA_BRPORT_ISOLATED,
 	IFLA_BRPORT_BACKUP_PORT,
 	IFLA_BRPORT_MRP_RING_OPEN,
-	IFLA_BRPORT_MRP_IN_OPEN,
 	__IFLA_BRPORT_MAX
 };
 #define IFLA_BRPORT_MAX (__IFLA_BRPORT_MAX - 1)
@@ -410,8 +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,
 };
 
@@ -654,7 +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_MAX,
 };
 

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[0];
-};
-
-struct tc_u32_mark {
-	__u32		val;
-	__u32		mask;
-	__u32		success;
-};
-
-struct tc_u32_pcnt {
-	__u64 rcnt;
-	__u64 rhit;
-	__u64 kcnts[0];
-};
-
-/* 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/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
 }
 
@@ -45,15 +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	\
-	[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
@@ -139,7 +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 ((${libbpf_conflict_cnt} == 0)); then
 				echo "Looks like only non-libbpf files have conflicts, ignoring..."
@@ -155,37 +152,15 @@ cherry_pick_commits()
 					echo "Error! That still failed! Please resolve manually."
 				else
 					echo "Success! All cherry-pick conflicts were resolved for '${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..."
@@ -251,7 +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
 
@@ -263,18 +237,18 @@ cd_to ${LIBBPF_REPO}
 git checkout -b ${LIBBPF_SYNC_TAG}
 
 for patch in $(ls -1 ${TMP_DIR}/patches | tail -n +2); do
-	if ! git am --3way --committer-date-is-author-date "${TMP_DIR}/patches/${patch}"; then
+	if ! git am --committer-date-is-author-date "${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)
@@ -312,7 +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}" > ${TMP_DIR}/github-view.ls
@@ -330,17 +304,19 @@ done
 if ((${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

@@ -1,13 +1,5 @@
 # SPDX-License-Identifier: (LGPL-2.1 OR BSD-2-Clause)
 
-ifeq ($(V),1)
-	Q =
-	msg =
-else
-	Q = @
-	msg = @printf '  %-8s %s%s\n' "$(1)" "$(notdir $(2))" "$(if $(3), $(3))";
-endif
-
 LIBBPF_VERSION := $(shell \
 	grep -oE '^LIBBPF_([0-9.]+)' libbpf.map | \
 	sort -rV | head -n1 | cut -d'_' -f2)
@@ -18,6 +10,11 @@ TOPDIR = ..
 INCLUDES := -I. -I$(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
@@ -27,8 +24,8 @@ 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 ?= .
@@ -36,8 +33,7 @@ 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 xsk.o \
-	btf_dump.o hashmap.o ringbuf.o strset.o linker.o gen_loader.o \
-	relo_core.o
+	btf_dump.o hashmap.o ringbuf.o
 SHARED_OBJS := $(addprefix $(SHARED_OBJDIR)/,$(OBJS))
 STATIC_OBJS := $(addprefix $(STATIC_OBJDIR)/,$(OBJS))
 
@@ -49,9 +45,9 @@ ifndef BUILD_STATIC_ONLY
 	VERSION_SCRIPT := libbpf.map
 endif
 
-HEADERS := bpf.h libbpf.h btf.h libbpf_common.h libbpf_legacy.h xsk.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
+	   bpf_endian.h bpf_core_read.h libbpf_common.h
 UAPI_HEADERS := $(addprefix $(TOPDIR)/include/uapi/linux/,\
 			    bpf.h bpf_common.h btf.h)
 
@@ -61,19 +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
@@ -84,54 +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:
-	$(Q)sed -e "s|@PREFIX@|$(PREFIX)|" \
-		-e "s|@LIBDIR@|$(LIBDIR_PC)|" \
+	sed -e "s|@PREFIX@|$(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
@@ -149,16 +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
 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
+	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
@@ -10,14 +10,14 @@ 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_``, ``xsk_``,
-``btf_dump_``, ``ring_buffer_``, ``perf_buffer_``.
+``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``.
 
@@ -68,8 +72,12 @@ 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.
 
-ABI
----
+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
@@ -108,8 +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;
@@ -121,8 +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;
@@ -142,7 +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.
@@ -150,53 +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.c

@@ -32,6 +32,9 @@
 #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
+
 /*
  * When building perf, unistd.h is overridden. __NR_bpf is
  * required to be defined explicitly.
@@ -67,12 +70,11 @@ static inline int sys_bpf(enum bpf_cmd cmd, union bpf_attr *attr,
 
 static inline int sys_bpf_prog_load(union bpf_attr *attr, unsigned int size)
 {
-	int retries = 5;
 	int fd;
 
 	do {
 		fd = sys_bpf(BPF_PROG_LOAD, attr, size);
-	} while (fd < 0 && errno == EAGAIN && retries-- > 0);
+	} while (fd < 0 && errno == EAGAIN);
 
 	return fd;
 }
@@ -80,7 +82,6 @@ static inline int sys_bpf_prog_load(union bpf_attr *attr, unsigned int size)
 int bpf_create_map_xattr(const struct bpf_create_map_attr *create_attr)
 {
 	union bpf_attr attr;
-	int fd;
 
 	memset(&attr, '\0', sizeof(attr));
 
@@ -103,8 +104,7 @@ int bpf_create_map_xattr(const struct bpf_create_map_attr *create_attr)
 	else
 		attr.inner_map_fd = create_attr->inner_map_fd;
 
-	fd = sys_bpf(BPF_MAP_CREATE, &attr, sizeof(attr));
-	return libbpf_err_errno(fd);
+	return sys_bpf(BPF_MAP_CREATE, &attr, sizeof(attr));
 }
 
 int bpf_create_map_node(enum bpf_map_type map_type, const char *name,
@@ -162,7 +162,6 @@ int bpf_create_map_in_map_node(enum bpf_map_type map_type, const char *name,
 			       __u32 map_flags, int node)
 {
 	union bpf_attr attr;
-	int fd;
 
 	memset(&attr, '\0', sizeof(attr));
 
@@ -181,8 +180,7 @@ int bpf_create_map_in_map_node(enum bpf_map_type map_type, const char *name,
 		attr.numa_node = node;
 	}
 
-	fd = sys_bpf(BPF_MAP_CREATE, &attr, sizeof(attr));
-	return libbpf_err_errno(fd);
+	return sys_bpf(BPF_MAP_CREATE, &attr, sizeof(attr));
 }
 
 int bpf_create_map_in_map(enum bpf_map_type map_type, const char *name,
@@ -219,56 +217,59 @@ alloc_zero_tailing_info(const void *orecord, __u32 cnt,
 	return info;
 }
 
-int libbpf__bpf_prog_load(const struct bpf_prog_load_params *load_attr)
+int bpf_load_program_xattr(const struct bpf_load_program_attr *load_attr,
+			   char *log_buf, size_t log_buf_sz)
 {
 	void *finfo = NULL, *linfo = NULL;
 	union bpf_attr attr;
+	__u32 log_level;
 	int fd;
 
-	if (!load_attr->log_buf != !load_attr->log_buf_sz)
-		return libbpf_err(-EINVAL);
+	if (!load_attr || !log_buf != !log_buf_sz)
+		return -EINVAL;
 
-	if (load_attr->log_level > (4 | 2 | 1) || (load_attr->log_level && !load_attr->log_buf))
-		return libbpf_err(-EINVAL);
+	log_level = load_attr->log_level;
+	if (log_level > (4 | 2 | 1) || (log_level && !log_buf))
+		return -EINVAL;
 
 	memset(&attr, 0, sizeof(attr));
 	attr.prog_type = load_attr->prog_type;
 	attr.expected_attach_type = load_attr->expected_attach_type;
-
-	if (load_attr->attach_prog_fd)
+	if (attr.prog_type == BPF_PROG_TYPE_STRUCT_OPS ||
+	    attr.prog_type == BPF_PROG_TYPE_LSM) {
+		attr.attach_btf_id = load_attr->attach_btf_id;
+	} else if (attr.prog_type == BPF_PROG_TYPE_TRACING ||
+		   attr.prog_type == BPF_PROG_TYPE_EXT) {
+		attr.attach_btf_id = load_attr->attach_btf_id;
 		attr.attach_prog_fd = load_attr->attach_prog_fd;
-	else
-		attr.attach_btf_obj_fd = load_attr->attach_btf_obj_fd;
-	attr.attach_btf_id = load_attr->attach_btf_id;
-
-	attr.prog_ifindex = load_attr->prog_ifindex;
-	attr.kern_version = load_attr->kern_version;
-
-	attr.insn_cnt = (__u32)load_attr->insn_cnt;
+	} else {
+		attr.prog_ifindex = load_attr->prog_ifindex;
+		attr.kern_version = load_attr->kern_version;
+	}
+	attr.insn_cnt = (__u32)load_attr->insns_cnt;
 	attr.insns = ptr_to_u64(load_attr->insns);
 	attr.license = ptr_to_u64(load_attr->license);
 
-	attr.log_level = load_attr->log_level;
-	if (attr.log_level) {
-		attr.log_buf = ptr_to_u64(load_attr->log_buf);
-		attr.log_size = load_attr->log_buf_sz;
+	attr.log_level = log_level;
+	if (log_level) {
+		attr.log_buf = ptr_to_u64(log_buf);
+		attr.log_size = log_buf_sz;
+	} else {
+		attr.log_buf = ptr_to_u64(NULL);
+		attr.log_size = 0;
 	}
 
 	attr.prog_btf_fd = load_attr->prog_btf_fd;
-	attr.prog_flags = load_attr->prog_flags;
-
 	attr.func_info_rec_size = load_attr->func_info_rec_size;
 	attr.func_info_cnt = load_attr->func_info_cnt;
 	attr.func_info = ptr_to_u64(load_attr->func_info);
-
 	attr.line_info_rec_size = load_attr->line_info_rec_size;
 	attr.line_info_cnt = load_attr->line_info_cnt;
 	attr.line_info = ptr_to_u64(load_attr->line_info);
-	attr.fd_array = ptr_to_u64(load_attr->fd_array);
-
 	if (load_attr->name)
 		memcpy(attr.prog_name, load_attr->name,
-		       min(strlen(load_attr->name), (size_t)BPF_OBJ_NAME_LEN - 1));
+		       min(strlen(load_attr->name), BPF_OBJ_NAME_LEN - 1));
+	attr.prog_flags = load_attr->prog_flags;
 
 	fd = sys_bpf_prog_load(&attr, sizeof(attr));
 	if (fd >= 0)
@@ -286,10 +287,8 @@ int libbpf__bpf_prog_load(const struct bpf_prog_load_params *load_attr)
 							load_attr->func_info_cnt,
 							load_attr->func_info_rec_size,
 							attr.func_info_rec_size);
-			if (!finfo) {
-				errno = E2BIG;
+			if (!finfo)
 				goto done;
-			}
 
 			attr.func_info = ptr_to_u64(finfo);
 			attr.func_info_rec_size = load_attr->func_info_rec_size;
@@ -300,10 +299,8 @@ int libbpf__bpf_prog_load(const struct bpf_prog_load_params *load_attr)
 							load_attr->line_info_cnt,
 							load_attr->line_info_rec_size,
 							attr.line_info_rec_size);
-			if (!linfo) {
-				errno = E2BIG;
+			if (!linfo)
 				goto done;
-			}
 
 			attr.line_info = ptr_to_u64(linfo);
 			attr.line_info_rec_size = load_attr->line_info_rec_size;
@@ -312,68 +309,24 @@ int libbpf__bpf_prog_load(const struct bpf_prog_load_params *load_attr)
 		}
 
 		fd = sys_bpf_prog_load(&attr, sizeof(attr));
+
 		if (fd >= 0)
 			goto done;
 	}
 
-	if (load_attr->log_level || !load_attr->log_buf)
+	if (log_level || !log_buf)
 		goto done;
 
 	/* Try again with log */
-	attr.log_buf = ptr_to_u64(load_attr->log_buf);
-	attr.log_size = load_attr->log_buf_sz;
+	attr.log_buf = ptr_to_u64(log_buf);
+	attr.log_size = log_buf_sz;
 	attr.log_level = 1;
-	load_attr->log_buf[0] = 0;
-
+	log_buf[0] = 0;
 	fd = sys_bpf_prog_load(&attr, sizeof(attr));
 done:
-	/* free() doesn't affect errno, so we don't need to restore it */
 	free(finfo);
 	free(linfo);
-	return libbpf_err_errno(fd);
-}
-
-int bpf_load_program_xattr(const struct bpf_load_program_attr *load_attr,
-			   char *log_buf, size_t log_buf_sz)
-{
-	struct bpf_prog_load_params p = {};
-
-	if (!load_attr || !log_buf != !log_buf_sz)
-		return libbpf_err(-EINVAL);
-
-	p.prog_type = load_attr->prog_type;
-	p.expected_attach_type = load_attr->expected_attach_type;
-	switch (p.prog_type) {
-	case BPF_PROG_TYPE_STRUCT_OPS:
-	case BPF_PROG_TYPE_LSM:
-		p.attach_btf_id = load_attr->attach_btf_id;
-		break;
-	case BPF_PROG_TYPE_TRACING:
-	case BPF_PROG_TYPE_EXT:
-		p.attach_btf_id = load_attr->attach_btf_id;
-		p.attach_prog_fd = load_attr->attach_prog_fd;
-		break;
-	default:
-		p.prog_ifindex = load_attr->prog_ifindex;
-		p.kern_version = load_attr->kern_version;
-	}
-	p.insn_cnt = load_attr->insns_cnt;
-	p.insns = load_attr->insns;
-	p.license = load_attr->license;
-	p.log_level = load_attr->log_level;
-	p.log_buf = log_buf;
-	p.log_buf_sz = log_buf_sz;
-	p.prog_btf_fd = load_attr->prog_btf_fd;
-	p.func_info_rec_size = load_attr->func_info_rec_size;
-	p.func_info_cnt = load_attr->func_info_cnt;
-	p.func_info = load_attr->func_info;
-	p.line_info_rec_size = load_attr->line_info_rec_size;
-	p.line_info_cnt = load_attr->line_info_cnt;
-	p.line_info = load_attr->line_info;
-	p.name = load_attr->name;
-	p.prog_flags = load_attr->prog_flags;
-
-	return libbpf__bpf_prog_load(&p);
+	return fd;
 }
 
 int bpf_load_program(enum bpf_prog_type type, const struct bpf_insn *insns,
@@ -401,7 +354,6 @@ int bpf_verify_program(enum bpf_prog_type type, const struct bpf_insn *insns,
 		       int log_level)
 {
 	union bpf_attr attr;
-	int fd;
 
 	memset(&attr, 0, sizeof(attr));
 	attr.prog_type = type;
@@ -415,15 +367,13 @@ int bpf_verify_program(enum bpf_prog_type type, const struct bpf_insn *insns,
 	attr.kern_version = kern_version;
 	attr.prog_flags = prog_flags;
 
-	fd = sys_bpf_prog_load(&attr, sizeof(attr));
-	return libbpf_err_errno(fd);
+	return sys_bpf_prog_load(&attr, sizeof(attr));
 }
 
 int bpf_map_update_elem(int fd, const void *key, const void *value,
 			__u64 flags)
 {
 	union bpf_attr attr;
-	int ret;
 
 	memset(&attr, 0, sizeof(attr));
 	attr.map_fd = fd;
@@ -431,28 +381,24 @@ int bpf_map_update_elem(int fd, const void *key, const void *value,
 	attr.value = ptr_to_u64(value);
 	attr.flags = flags;
 
-	ret = sys_bpf(BPF_MAP_UPDATE_ELEM, &attr, sizeof(attr));
-	return libbpf_err_errno(ret);
+	return sys_bpf(BPF_MAP_UPDATE_ELEM, &attr, sizeof(attr));
 }
 
 int bpf_map_lookup_elem(int fd, const void *key, void *value)
 {
 	union bpf_attr attr;
-	int ret;
 
 	memset(&attr, 0, sizeof(attr));
 	attr.map_fd = fd;
 	attr.key = ptr_to_u64(key);
 	attr.value = ptr_to_u64(value);
 
-	ret = sys_bpf(BPF_MAP_LOOKUP_ELEM, &attr, sizeof(attr));
-	return libbpf_err_errno(ret);
+	return sys_bpf(BPF_MAP_LOOKUP_ELEM, &attr, sizeof(attr));
 }
 
 int bpf_map_lookup_elem_flags(int fd, const void *key, void *value, __u64 flags)
 {
 	union bpf_attr attr;
-	int ret;
 
 	memset(&attr, 0, sizeof(attr));
 	attr.map_fd = fd;
@@ -460,74 +406,52 @@ int bpf_map_lookup_elem_flags(int fd, const void *key, void *value, __u64 flags)
 	attr.value = ptr_to_u64(value);
 	attr.flags = flags;
 
-	ret = sys_bpf(BPF_MAP_LOOKUP_ELEM, &attr, sizeof(attr));
-	return libbpf_err_errno(ret);
+	return sys_bpf(BPF_MAP_LOOKUP_ELEM, &attr, sizeof(attr));
 }
 
 int bpf_map_lookup_and_delete_elem(int fd, const void *key, void *value)
 {
 	union bpf_attr attr;
-	int ret;
 
 	memset(&attr, 0, sizeof(attr));
 	attr.map_fd = fd;
 	attr.key = ptr_to_u64(key);
 	attr.value = ptr_to_u64(value);
 
-	ret = sys_bpf(BPF_MAP_LOOKUP_AND_DELETE_ELEM, &attr, sizeof(attr));
-	return libbpf_err_errno(ret);
-}
-
-int bpf_map_lookup_and_delete_elem_flags(int fd, const void *key, void *value, __u64 flags)
-{
-	union bpf_attr attr;
-
-	memset(&attr, 0, sizeof(attr));
-	attr.map_fd = fd;
-	attr.key = ptr_to_u64(key);
-	attr.value = ptr_to_u64(value);
-	attr.flags = flags;
-
 	return sys_bpf(BPF_MAP_LOOKUP_AND_DELETE_ELEM, &attr, sizeof(attr));
 }
 
 int bpf_map_delete_elem(int fd, const void *key)
 {
 	union bpf_attr attr;
-	int ret;
 
 	memset(&attr, 0, sizeof(attr));
 	attr.map_fd = fd;
 	attr.key = ptr_to_u64(key);
 
-	ret = sys_bpf(BPF_MAP_DELETE_ELEM, &attr, sizeof(attr));
-	return libbpf_err_errno(ret);
+	return sys_bpf(BPF_MAP_DELETE_ELEM, &attr, sizeof(attr));
 }
 
 int bpf_map_get_next_key(int fd, const void *key, void *next_key)
 {
 	union bpf_attr attr;
-	int ret;
 
 	memset(&attr, 0, sizeof(attr));
 	attr.map_fd = fd;
 	attr.key = ptr_to_u64(key);
 	attr.next_key = ptr_to_u64(next_key);
 
-	ret = sys_bpf(BPF_MAP_GET_NEXT_KEY, &attr, sizeof(attr));
-	return libbpf_err_errno(ret);
+	return sys_bpf(BPF_MAP_GET_NEXT_KEY, &attr, sizeof(attr));
 }
 
 int bpf_map_freeze(int fd)
 {
 	union bpf_attr attr;
-	int ret;
 
 	memset(&attr, 0, sizeof(attr));
 	attr.map_fd = fd;
 
-	ret = sys_bpf(BPF_MAP_FREEZE, &attr, sizeof(attr));
-	return libbpf_err_errno(ret);
+	return sys_bpf(BPF_MAP_FREEZE, &attr, sizeof(attr));
 }
 
 static int bpf_map_batch_common(int cmd, int fd, void  *in_batch,
@@ -539,7 +463,7 @@ static int bpf_map_batch_common(int cmd, int fd, void  *in_batch,
 	int ret;
 
 	if (!OPTS_VALID(opts, bpf_map_batch_opts))
-		return libbpf_err(-EINVAL);
+		return -EINVAL;
 
 	memset(&attr, 0, sizeof(attr));
 	attr.batch.map_fd = fd;
@@ -554,7 +478,7 @@ static int bpf_map_batch_common(int cmd, int fd, void  *in_batch,
 	ret = sys_bpf(cmd, &attr, sizeof(attr));
 	*count = attr.batch.count;
 
-	return libbpf_err_errno(ret);
+	return ret;
 }
 
 int bpf_map_delete_batch(int fd, void *keys, __u32 *count,
@@ -591,26 +515,22 @@ int bpf_map_update_batch(int fd, void *keys, void *values, __u32 *count,
 int bpf_obj_pin(int fd, const char *pathname)
 {
 	union bpf_attr attr;
-	int ret;
 
 	memset(&attr, 0, sizeof(attr));
 	attr.pathname = ptr_to_u64((void *)pathname);
 	attr.bpf_fd = fd;
 
-	ret = sys_bpf(BPF_OBJ_PIN, &attr, sizeof(attr));
-	return libbpf_err_errno(ret);
+	return sys_bpf(BPF_OBJ_PIN, &attr, sizeof(attr));
 }
 
 int bpf_obj_get(const char *pathname)
 {
 	union bpf_attr attr;
-	int fd;
 
 	memset(&attr, 0, sizeof(attr));
 	attr.pathname = ptr_to_u64((void *)pathname);
 
-	fd = sys_bpf(BPF_OBJ_GET, &attr, sizeof(attr));
-	return libbpf_err_errno(fd);
+	return sys_bpf(BPF_OBJ_GET, &attr, sizeof(attr));
 }
 
 int bpf_prog_attach(int prog_fd, int target_fd, enum bpf_attach_type type,
@@ -628,10 +548,9 @@ int bpf_prog_attach_xattr(int prog_fd, int target_fd,
 			  const struct bpf_prog_attach_opts *opts)
 {
 	union bpf_attr attr;
-	int ret;
 
 	if (!OPTS_VALID(opts, bpf_prog_attach_opts))
-		return libbpf_err(-EINVAL);
+		return -EINVAL;
 
 	memset(&attr, 0, sizeof(attr));
 	attr.target_fd	   = target_fd;
@@ -640,110 +559,56 @@ int bpf_prog_attach_xattr(int prog_fd, int target_fd,
 	attr.attach_flags  = OPTS_GET(opts, flags, 0);
 	attr.replace_bpf_fd = OPTS_GET(opts, replace_prog_fd, 0);
 
-	ret = sys_bpf(BPF_PROG_ATTACH, &attr, sizeof(attr));
-	return libbpf_err_errno(ret);
+	return sys_bpf(BPF_PROG_ATTACH, &attr, sizeof(attr));
 }
 
 int bpf_prog_detach(int target_fd, enum bpf_attach_type type)
 {
 	union bpf_attr attr;
-	int ret;
 
 	memset(&attr, 0, sizeof(attr));
 	attr.target_fd	 = target_fd;
 	attr.attach_type = type;
 
-	ret = sys_bpf(BPF_PROG_DETACH, &attr, sizeof(attr));
-	return libbpf_err_errno(ret);
+	return sys_bpf(BPF_PROG_DETACH, &attr, sizeof(attr));
 }
 
 int bpf_prog_detach2(int prog_fd, int target_fd, enum bpf_attach_type type)
 {
 	union bpf_attr attr;
-	int ret;
 
 	memset(&attr, 0, sizeof(attr));
 	attr.target_fd	 = target_fd;
 	attr.attach_bpf_fd = prog_fd;
 	attr.attach_type = type;
 
-	ret = sys_bpf(BPF_PROG_DETACH, &attr, sizeof(attr));
-	return libbpf_err_errno(ret);
+	return sys_bpf(BPF_PROG_DETACH, &attr, sizeof(attr));
 }
 
 int bpf_link_create(int prog_fd, int target_fd,
 		    enum bpf_attach_type attach_type,
 		    const struct bpf_link_create_opts *opts)
 {
-	__u32 target_btf_id, iter_info_len;
 	union bpf_attr attr;
-	int fd;
 
 	if (!OPTS_VALID(opts, bpf_link_create_opts))
-		return libbpf_err(-EINVAL);
-
-	iter_info_len = OPTS_GET(opts, iter_info_len, 0);
-	target_btf_id = OPTS_GET(opts, target_btf_id, 0);
-
-	/* validate we don't have unexpected combinations of non-zero fields */
-	if (iter_info_len || target_btf_id) {
-		if (iter_info_len && target_btf_id)
-			return libbpf_err(-EINVAL);
-		if (!OPTS_ZEROED(opts, target_btf_id))
-			return libbpf_err(-EINVAL);
-	}
+		return -EINVAL;
 
 	memset(&attr, 0, sizeof(attr));
 	attr.link_create.prog_fd = prog_fd;
 	attr.link_create.target_fd = target_fd;
 	attr.link_create.attach_type = attach_type;
-	attr.link_create.flags = OPTS_GET(opts, flags, 0);
 
-	if (target_btf_id) {
-		attr.link_create.target_btf_id = target_btf_id;
-		goto proceed;
-	}
-
-	switch (attach_type) {
-	case BPF_TRACE_ITER:
-		attr.link_create.iter_info = ptr_to_u64(OPTS_GET(opts, iter_info, (void *)0));
-		attr.link_create.iter_info_len = iter_info_len;
-		break;
-	case BPF_PERF_EVENT:
-		attr.link_create.perf_event.bpf_cookie = OPTS_GET(opts, perf_event.bpf_cookie, 0);
-		if (!OPTS_ZEROED(opts, perf_event))
-			return libbpf_err(-EINVAL);
-		break;
-	default:
-		if (!OPTS_ZEROED(opts, flags))
-			return libbpf_err(-EINVAL);
-		break;
-	}
-proceed:
-	fd = sys_bpf(BPF_LINK_CREATE, &attr, sizeof(attr));
-	return libbpf_err_errno(fd);
-}
-
-int bpf_link_detach(int link_fd)
-{
-	union bpf_attr attr;
-	int ret;
-
-	memset(&attr, 0, sizeof(attr));
-	attr.link_detach.link_fd = link_fd;
-
-	ret = sys_bpf(BPF_LINK_DETACH, &attr, sizeof(attr));
-	return libbpf_err_errno(ret);
+	return sys_bpf(BPF_LINK_CREATE, &attr, sizeof(attr));
 }
 
 int bpf_link_update(int link_fd, int new_prog_fd,
 		    const struct bpf_link_update_opts *opts)
 {
 	union bpf_attr attr;
-	int ret;
 
 	if (!OPTS_VALID(opts, bpf_link_update_opts))
-		return libbpf_err(-EINVAL);
+		return -EINVAL;
 
 	memset(&attr, 0, sizeof(attr));
 	attr.link_update.link_fd = link_fd;
@@ -751,20 +616,17 @@ int bpf_link_update(int link_fd, int new_prog_fd,
 	attr.link_update.flags = OPTS_GET(opts, flags, 0);
 	attr.link_update.old_prog_fd = OPTS_GET(opts, old_prog_fd, 0);
 
-	ret = sys_bpf(BPF_LINK_UPDATE, &attr, sizeof(attr));
-	return libbpf_err_errno(ret);
+	return sys_bpf(BPF_LINK_UPDATE, &attr, sizeof(attr));
 }
 
 int bpf_iter_create(int link_fd)
 {
 	union bpf_attr attr;
-	int fd;
 
 	memset(&attr, 0, sizeof(attr));
 	attr.iter_create.link_fd = link_fd;
 
-	fd = sys_bpf(BPF_ITER_CREATE, &attr, sizeof(attr));
-	return libbpf_err_errno(fd);
+	return sys_bpf(BPF_ITER_CREATE, &attr, sizeof(attr));
 }
 
 int bpf_prog_query(int target_fd, enum bpf_attach_type type, __u32 query_flags,
@@ -781,12 +643,10 @@ int bpf_prog_query(int target_fd, enum bpf_attach_type type, __u32 query_flags,
 	attr.query.prog_ids	= ptr_to_u64(prog_ids);
 
 	ret = sys_bpf(BPF_PROG_QUERY, &attr, sizeof(attr));
-
 	if (attach_flags)
 		*attach_flags = attr.query.attach_flags;
 	*prog_cnt = attr.query.prog_cnt;
-
-	return libbpf_err_errno(ret);
+	return ret;
 }
 
 int bpf_prog_test_run(int prog_fd, int repeat, void *data, __u32 size,
@@ -804,15 +664,13 @@ int bpf_prog_test_run(int prog_fd, int repeat, void *data, __u32 size,
 	attr.test.repeat = repeat;
 
 	ret = sys_bpf(BPF_PROG_TEST_RUN, &attr, sizeof(attr));
-
 	if (size_out)
 		*size_out = attr.test.data_size_out;
 	if (retval)
 		*retval = attr.test.retval;
 	if (duration)
 		*duration = attr.test.duration;
-
-	return libbpf_err_errno(ret);
+	return ret;
 }
 
 int bpf_prog_test_run_xattr(struct bpf_prog_test_run_attr *test_attr)
@@ -821,7 +679,7 @@ int bpf_prog_test_run_xattr(struct bpf_prog_test_run_attr *test_attr)
 	int ret;
 
 	if (!test_attr->data_out && test_attr->data_size_out > 0)
-		return libbpf_err(-EINVAL);
+		return -EINVAL;
 
 	memset(&attr, 0, sizeof(attr));
 	attr.test.prog_fd = test_attr->prog_fd;
@@ -836,46 +694,11 @@ int bpf_prog_test_run_xattr(struct bpf_prog_test_run_attr *test_attr)
 	attr.test.repeat = test_attr->repeat;
 
 	ret = sys_bpf(BPF_PROG_TEST_RUN, &attr, sizeof(attr));
-
 	test_attr->data_size_out = attr.test.data_size_out;
 	test_attr->ctx_size_out = attr.test.ctx_size_out;
 	test_attr->retval = attr.test.retval;
 	test_attr->duration = attr.test.duration;
-
-	return libbpf_err_errno(ret);
-}
-
-int bpf_prog_test_run_opts(int prog_fd, struct bpf_test_run_opts *opts)
-{
-	union bpf_attr attr;
-	int ret;
-
-	if (!OPTS_VALID(opts, bpf_test_run_opts))
-		return libbpf_err(-EINVAL);
-
-	memset(&attr, 0, sizeof(attr));
-	attr.test.prog_fd = prog_fd;
-	attr.test.cpu = OPTS_GET(opts, cpu, 0);
-	attr.test.flags = OPTS_GET(opts, flags, 0);
-	attr.test.repeat = OPTS_GET(opts, repeat, 0);
-	attr.test.duration = OPTS_GET(opts, duration, 0);
-	attr.test.ctx_size_in = OPTS_GET(opts, ctx_size_in, 0);
-	attr.test.ctx_size_out = OPTS_GET(opts, ctx_size_out, 0);
-	attr.test.data_size_in = OPTS_GET(opts, data_size_in, 0);
-	attr.test.data_size_out = OPTS_GET(opts, data_size_out, 0);
-	attr.test.ctx_in = ptr_to_u64(OPTS_GET(opts, ctx_in, NULL));
-	attr.test.ctx_out = ptr_to_u64(OPTS_GET(opts, ctx_out, NULL));
-	attr.test.data_in = ptr_to_u64(OPTS_GET(opts, data_in, NULL));
-	attr.test.data_out = ptr_to_u64(OPTS_GET(opts, data_out, NULL));
-
-	ret = sys_bpf(BPF_PROG_TEST_RUN, &attr, sizeof(attr));
-
-	OPTS_SET(opts, data_size_out, attr.test.data_size_out);
-	OPTS_SET(opts, ctx_size_out, attr.test.ctx_size_out);
-	OPTS_SET(opts, duration, attr.test.duration);
-	OPTS_SET(opts, retval, attr.test.retval);
-
-	return libbpf_err_errno(ret);
+	return ret;
 }
 
 static int bpf_obj_get_next_id(__u32 start_id, __u32 *next_id, int cmd)
@@ -890,7 +713,7 @@ static int bpf_obj_get_next_id(__u32 start_id, __u32 *next_id, int cmd)
 	if (!err)
 		*next_id = attr.next_id;
 
-	return libbpf_err_errno(err);
+	return err;
 }
 
 int bpf_prog_get_next_id(__u32 start_id, __u32 *next_id)
@@ -916,49 +739,41 @@ int bpf_link_get_next_id(__u32 start_id, __u32 *next_id)
 int bpf_prog_get_fd_by_id(__u32 id)
 {
 	union bpf_attr attr;
-	int fd;
 
 	memset(&attr, 0, sizeof(attr));
 	attr.prog_id = id;
 
-	fd = sys_bpf(BPF_PROG_GET_FD_BY_ID, &attr, sizeof(attr));
-	return libbpf_err_errno(fd);
+	return sys_bpf(BPF_PROG_GET_FD_BY_ID, &attr, sizeof(attr));
 }
 
 int bpf_map_get_fd_by_id(__u32 id)
 {
 	union bpf_attr attr;
-	int fd;
 
 	memset(&attr, 0, sizeof(attr));
 	attr.map_id = id;
 
-	fd = sys_bpf(BPF_MAP_GET_FD_BY_ID, &attr, sizeof(attr));
-	return libbpf_err_errno(fd);
+	return sys_bpf(BPF_MAP_GET_FD_BY_ID, &attr, sizeof(attr));
 }
 
 int bpf_btf_get_fd_by_id(__u32 id)
 {
 	union bpf_attr attr;
-	int fd;
 
 	memset(&attr, 0, sizeof(attr));
 	attr.btf_id = id;
 
-	fd = sys_bpf(BPF_BTF_GET_FD_BY_ID, &attr, sizeof(attr));
-	return libbpf_err_errno(fd);
+	return sys_bpf(BPF_BTF_GET_FD_BY_ID, &attr, sizeof(attr));
 }
 
 int bpf_link_get_fd_by_id(__u32 id)
 {
 	union bpf_attr attr;
-	int fd;
 
 	memset(&attr, 0, sizeof(attr));
 	attr.link_id = id;
 
-	fd = sys_bpf(BPF_LINK_GET_FD_BY_ID, &attr, sizeof(attr));
-	return libbpf_err_errno(fd);
+	return sys_bpf(BPF_LINK_GET_FD_BY_ID, &attr, sizeof(attr));
 }
 
 int bpf_obj_get_info_by_fd(int bpf_fd, void *info, __u32 *info_len)
@@ -972,27 +787,24 @@ int bpf_obj_get_info_by_fd(int bpf_fd, void *info, __u32 *info_len)
 	attr.info.info = ptr_to_u64(info);
 
 	err = sys_bpf(BPF_OBJ_GET_INFO_BY_FD, &attr, sizeof(attr));
-
 	if (!err)
 		*info_len = attr.info.info_len;
 
-	return libbpf_err_errno(err);
+	return err;
 }
 
 int bpf_raw_tracepoint_open(const char *name, int prog_fd)
 {
 	union bpf_attr attr;
-	int fd;
 
 	memset(&attr, 0, sizeof(attr));
 	attr.raw_tracepoint.name = ptr_to_u64(name);
 	attr.raw_tracepoint.prog_fd = prog_fd;
 
-	fd = sys_bpf(BPF_RAW_TRACEPOINT_OPEN, &attr, sizeof(attr));
-	return libbpf_err_errno(fd);
+	return sys_bpf(BPF_RAW_TRACEPOINT_OPEN, &attr, sizeof(attr));
 }
 
-int bpf_load_btf(const void *btf, __u32 btf_size, char *log_buf, __u32 log_buf_size,
+int bpf_load_btf(void *btf, __u32 btf_size, char *log_buf, __u32 log_buf_size,
 		 bool do_log)
 {
 	union bpf_attr attr = {};
@@ -1009,13 +821,12 @@ retry:
 	}
 
 	fd = sys_bpf(BPF_BTF_LOAD, &attr, sizeof(attr));
-
-	if (fd < 0 && !do_log && log_buf && log_buf_size) {
+	if (fd == -1 && !do_log && log_buf && log_buf_size) {
 		do_log = true;
 		goto retry;
 	}
 
-	return libbpf_err_errno(fd);
+	return fd;
 }
 
 int bpf_task_fd_query(int pid, int fd, __u32 flags, char *buf, __u32 *buf_len,
@@ -1032,42 +843,21 @@ int bpf_task_fd_query(int pid, int fd, __u32 flags, char *buf, __u32 *buf_len,
 	attr.task_fd_query.buf_len = *buf_len;
 
 	err = sys_bpf(BPF_TASK_FD_QUERY, &attr, sizeof(attr));
-
 	*buf_len = attr.task_fd_query.buf_len;
 	*prog_id = attr.task_fd_query.prog_id;
 	*fd_type = attr.task_fd_query.fd_type;
 	*probe_offset = attr.task_fd_query.probe_offset;
 	*probe_addr = attr.task_fd_query.probe_addr;
 
-	return libbpf_err_errno(err);
+	return err;
 }
 
 int bpf_enable_stats(enum bpf_stats_type type)
 {
 	union bpf_attr attr;
-	int fd;
 
 	memset(&attr, 0, sizeof(attr));
 	attr.enable_stats.type = type;
 
-	fd = sys_bpf(BPF_ENABLE_STATS, &attr, sizeof(attr));
-	return libbpf_err_errno(fd);
-}
-
-int bpf_prog_bind_map(int prog_fd, int map_fd,
-		      const struct bpf_prog_bind_opts *opts)
-{
-	union bpf_attr attr;
-	int ret;
-
-	if (!OPTS_VALID(opts, bpf_prog_bind_opts))
-		return libbpf_err(-EINVAL);
-
-	memset(&attr, 0, sizeof(attr));
-	attr.prog_bind_map.prog_fd = prog_fd;
-	attr.prog_bind_map.map_fd = map_fd;
-	attr.prog_bind_map.flags = OPTS_GET(opts, flags, 0);
-
-	ret = sys_bpf(BPF_PROG_BIND_MAP, &attr, sizeof(attr));
-	return libbpf_err_errno(ret);
+	return sys_bpf(BPF_ENABLE_STATS, &attr, sizeof(attr));
 }

src/bpf.h

@@ -124,8 +124,6 @@ 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_get_next_key(int fd, const void *key, void *next_key);
 LIBBPF_API int bpf_map_freeze(int fd);
@@ -170,28 +168,15 @@ 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;
-	};
-	size_t :0;
 };
-#define bpf_link_create_opts__last_field perf_event
+#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 */
@@ -243,7 +228,7 @@ 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(const void *btf, __u32 btf_size, char *log_buf,
+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,
@@ -252,40 +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;
-};
-#define bpf_test_run_opts__last_field cpu
-
-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

@@ -19,52 +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 */
-};
-
-/* 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 == __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;					      \
@@ -88,19 +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))				      \
@@ -120,75 +92,15 @@ enum bpf_enum_value_kind {
 	__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.
  */
 #define bpf_core_field_size(field)					    \
 	__builtin_preserve_field_info(field, BPF_FIELD_BYTE_SIZE)
 
 /*
- * 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 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
@@ -203,22 +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)
@@ -277,29 +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__)
 
 /*
@@ -307,73 +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
@@ -384,61 +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

@@ -1,55 +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
-
-struct ksym_relo_desc {
-	const char *name;
-	int kind;
-	int insn_idx;
-	bool is_weak;
-};
-
-struct ksym_desc {
-	const char *name;
-	int ref;
-	int kind;
-	int off;
-	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;
-	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 bpf_gen__finish(struct bpf_gen *gen);
-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, struct bpf_create_map_attr *map_attr, int map_idx);
-struct bpf_prog_load_params;
-void bpf_gen__prog_load(struct bpf_gen *gen, struct bpf_prog_load_params *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, int kind,
-			    int insn_idx);
-
-#endif

src/bpf_helpers.h

@@ -14,58 +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
  */
-#define SEC(name) \
-	_Pragma("GCC diagnostic push")					    \
-	_Pragma("GCC diagnostic ignored \"-Wignored-attributes\"")	    \
-	__attribute__((section(name), used))				    \
-	_Pragma("GCC diagnostic pop")					    \
+#define SEC(NAME) __attribute__((section(NAME), used))
 
-/* 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)				\
@@ -75,54 +50,6 @@
 	})
 #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
-
 /*
  * Helper structure used by eBPF C program
  * to describe BPF map attributes to libbpf loader
@@ -148,115 +75,5 @@ enum libbpf_tristate {
 };
 
 #define __kconfig __attribute__((section(".kconfig")))
-#define __ksym __attribute__((section(".ksyms")))
-
-#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

@@ -25,35 +25,26 @@
 	#define bpf_target_sparc
 	#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
-#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)
@@ -224,7 +215,7 @@ struct pt_regs;
 #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[2])
+#define PT_REGS_RC(x) ((x)->regs[1])
 #define PT_REGS_SP(x) ((x)->regs[29])
 #define PT_REGS_IP(x) ((x)->cp0_epc)
 
@@ -235,7 +226,7 @@ struct pt_regs;
 #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[2])
+#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)
 
@@ -296,56 +287,21 @@ struct pt_regs;
 #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
-#elif defined(bpf_target_defined)
+#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),			    \
+	({ bpf_probe_read(&(ip), sizeof(ip),				    \
 			  (void *)(PT_REGS_FP(ctx) + sizeof(ip))); })
 #endif
 
-#if !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; })
-
-#endif /* !defined(bpf_target_defined) */
-
-#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_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]
@@ -457,4 +413,20 @@ typeof(name(0)) name(struct pt_regs *ctx)				    \
 }									    \
 static __always_inline typeof(name(0)) ____##name(struct pt_regs *ctx, ##args)
 
+/*
+ * BPF_SEQ_PRINTF to wrap bpf_seq_printf to-be-printed values
+ * in a structure.
+ */
+#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>
 
@@ -26,127 +24,64 @@ 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 *libbpf_find_kernel_btf(void);
-
-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_DEPRECATED_SINCE(0, 6, "use btf__load_from_kernel_by_id instead")
-LIBBPF_API int btf__get_from_id(__u32 id, 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_DEPRECATED_SINCE(0, 6, "use btf__load_into_kernel instead")
 LIBBPF_API int btf__load(struct btf *btf);
-LIBBPF_API int btf__load_into_kernel(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__get_nr_types(const struct btf *btf);
-LIBBPF_API const struct btf *btf__base_btf(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__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,
@@ -156,88 +91,18 @@ 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__get_raw_data(const struct btf_ext *btf_ext,
 					     __u32 *size);
-LIBBPF_API LIBBPF_DEPRECATED("btf_ext__reloc_func_info was never meant as a public API and has wrong assumptions embedded in it; it will be removed in the future libbpf versions")
-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 LIBBPF_DEPRECATED("btf_ext__reloc_line_info was never meant as a public API and has wrong assumptions embedded in it; it will be removed in the future libbpf versions")
-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 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);
-
-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);
-
-/* 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_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 {
 	unsigned int dedup_table_size;
@@ -278,35 +143,13 @@ 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
  */
@@ -325,11 +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;
@@ -421,16 +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_tag(const struct btf_type *t)
-{
-	return btf_kind(t) == BTF_KIND_TAG;
-}
-
 static inline __u8 btf_int_encoding(const struct btf_type *t)
 {
 	return BTF_INT_ENCODING(*(__u32 *)(t + 1));
@@ -499,12 +327,6 @@ btf_var_secinfos(const struct btf_type *t)
 	return (struct btf_var_secinfo *)(t + 1);
 }
 
-struct btf_tag;
-static inline struct btf_tag *btf_tag(const struct btf_type *t)
-{
-	return (struct btf_tag *)(t + 1);
-}
-
 #ifdef __cplusplus
 } /* extern "C" */
 #endif

src/gen_loader.c

@@ -1,942 +0,0 @@
-// SPDX-License-Identifier: (LGPL-2.1 OR BSD-2-Clause)
-/* Copyright (c) 2021 Facebook */
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-#include <errno.h>
-#include <linux/filter.h>
-#include <sys/param.h>
-#include "btf.h"
-#include "bpf.h"
-#include "libbpf.h"
-#include "libbpf_internal.h"
-#include "hashmap.h"
-#include "bpf_gen_internal.h"
-#include "skel_internal.h"
-
-#define MAX_USED_MAPS	64
-#define MAX_USED_PROGS	32
-#define MAX_KFUNC_DESCS 256
-#define MAX_FD_ARRAY_SZ (MAX_USED_PROGS + MAX_KFUNC_DESCS)
-
-/* The following structure describes the stack layout of the loader program.
- * In addition R6 contains the pointer to context.
- * R7 contains the result of the last sys_bpf command (typically error or FD).
- * R9 contains the result of the last sys_close command.
- *
- * Naming convention:
- * ctx - bpf program context
- * stack - bpf program stack
- * blob - bpf_attr-s, strings, insns, map data.
- *        All the bytes that loader prog will use for read/write.
- */
-struct loader_stack {
-	__u32 btf_fd;
-	__u32 prog_fd[MAX_USED_PROGS];
-	__u32 inner_map_fd;
-};
-
-#define stack_off(field) \
-	(__s16)(-sizeof(struct loader_stack) + offsetof(struct loader_stack, field))
-
-#define attr_field(attr, field) (attr + offsetof(union bpf_attr, field))
-
-static int realloc_insn_buf(struct bpf_gen *gen, __u32 size)
-{
-	size_t off = gen->insn_cur - gen->insn_start;
-	void *insn_start;
-
-	if (gen->error)
-		return gen->error;
-	if (size > INT32_MAX || off + size > INT32_MAX) {
-		gen->error = -ERANGE;
-		return -ERANGE;
-	}
-	insn_start = realloc(gen->insn_start, off + size);
-	if (!insn_start) {
-		gen->error = -ENOMEM;
-		free(gen->insn_start);
-		gen->insn_start = NULL;
-		return -ENOMEM;
-	}
-	gen->insn_start = insn_start;
-	gen->insn_cur = insn_start + off;
-	return 0;
-}
-
-static int realloc_data_buf(struct bpf_gen *gen, __u32 size)
-{
-	size_t off = gen->data_cur - gen->data_start;
-	void *data_start;
-
-	if (gen->error)
-		return gen->error;
-	if (size > INT32_MAX || off + size > INT32_MAX) {
-		gen->error = -ERANGE;
-		return -ERANGE;
-	}
-	data_start = realloc(gen->data_start, off + size);
-	if (!data_start) {
-		gen->error = -ENOMEM;
-		free(gen->data_start);
-		gen->data_start = NULL;
-		return -ENOMEM;
-	}
-	gen->data_start = data_start;
-	gen->data_cur = data_start + off;
-	return 0;
-}
-
-static void emit(struct bpf_gen *gen, struct bpf_insn insn)
-{
-	if (realloc_insn_buf(gen, sizeof(insn)))
-		return;
-	memcpy(gen->insn_cur, &insn, sizeof(insn));
-	gen->insn_cur += sizeof(insn);
-}
-
-static void emit2(struct bpf_gen *gen, struct bpf_insn insn1, struct bpf_insn insn2)
-{
-	emit(gen, insn1);
-	emit(gen, insn2);
-}
-
-void bpf_gen__init(struct bpf_gen *gen, int log_level)
-{
-	size_t stack_sz = sizeof(struct loader_stack);
-	int i;
-
-	gen->log_level = log_level;
-	/* save ctx pointer into R6 */
-	emit(gen, BPF_MOV64_REG(BPF_REG_6, BPF_REG_1));
-
-	/* bzero stack */
-	emit(gen, BPF_MOV64_REG(BPF_REG_1, BPF_REG_10));
-	emit(gen, BPF_ALU64_IMM(BPF_ADD, BPF_REG_1, -stack_sz));
-	emit(gen, BPF_MOV64_IMM(BPF_REG_2, stack_sz));
-	emit(gen, BPF_MOV64_IMM(BPF_REG_3, 0));
-	emit(gen, BPF_EMIT_CALL(BPF_FUNC_probe_read_kernel));
-
-	/* jump over cleanup code */
-	emit(gen, BPF_JMP_IMM(BPF_JA, 0, 0,
-			      /* size of cleanup code below */
-			      (stack_sz / 4) * 3 + 2));
-
-	/* remember the label where all error branches will jump to */
-	gen->cleanup_label = gen->insn_cur - gen->insn_start;
-	/* emit cleanup code: close all temp FDs */
-	for (i = 0; i < stack_sz; i += 4) {
-		emit(gen, BPF_LDX_MEM(BPF_W, BPF_REG_1, BPF_REG_10, -stack_sz + i));
-		emit(gen, BPF_JMP_IMM(BPF_JSLE, BPF_REG_1, 0, 1));
-		emit(gen, BPF_EMIT_CALL(BPF_FUNC_sys_close));
-	}
-	/* R7 contains the error code from sys_bpf. Copy it into R0 and exit. */
-	emit(gen, BPF_MOV64_REG(BPF_REG_0, BPF_REG_7));
-	emit(gen, BPF_EXIT_INSN());
-}
-
-static int add_data(struct bpf_gen *gen, const void *data, __u32 size)
-{
-	__u32 size8 = roundup(size, 8);
-	__u64 zero = 0;
-	void *prev;
-
-	if (realloc_data_buf(gen, size8))
-		return 0;
-	prev = gen->data_cur;
-	if (data) {
-		memcpy(gen->data_cur, data, size);
-		memcpy(gen->data_cur + size, &zero, size8 - size);
-	} else {
-		memset(gen->data_cur, 0, size8);
-	}
-	gen->data_cur += size8;
-	return prev - gen->data_start;
-}
-
-/* Get index for map_fd/btf_fd slot in reserved fd_array, or in data relative
- * to start of fd_array. Caller can decide if it is usable or not.
- */
-static int add_map_fd(struct bpf_gen *gen)
-{
-	if (!gen->fd_array)
-		gen->fd_array = add_data(gen, NULL, MAX_FD_ARRAY_SZ * sizeof(int));
-	if (gen->nr_maps == MAX_USED_MAPS) {
-		pr_warn("Total maps exceeds %d\n", MAX_USED_MAPS);
-		gen->error = -E2BIG;
-		return 0;
-	}
-	return gen->nr_maps++;
-}
-
-static int add_kfunc_btf_fd(struct bpf_gen *gen)
-{
-	int cur;
-
-	if (!gen->fd_array)
-		gen->fd_array = add_data(gen, NULL, MAX_FD_ARRAY_SZ * sizeof(int));
-	if (gen->nr_fd_array == MAX_KFUNC_DESCS) {
-		cur = add_data(gen, NULL, sizeof(int));
-		return (cur - gen->fd_array) / sizeof(int);
-	}
-	return MAX_USED_MAPS + gen->nr_fd_array++;
-}
-
-static int blob_fd_array_off(struct bpf_gen *gen, int index)
-{
-	return gen->fd_array + index * sizeof(int);
-}
-
-static int insn_bytes_to_bpf_size(__u32 sz)
-{
-	switch (sz) {
-	case 8: return BPF_DW;
-	case 4: return BPF_W;
-	case 2: return BPF_H;
-	case 1: return BPF_B;
-	default: return -1;
-	}
-}
-
-/* *(u64 *)(blob + off) = (u64)(void *)(blob + data) */
-static void emit_rel_store(struct bpf_gen *gen, int off, int data)
-{
-	emit2(gen, BPF_LD_IMM64_RAW_FULL(BPF_REG_0, BPF_PSEUDO_MAP_IDX_VALUE,
-					 0, 0, 0, data));
-	emit2(gen, BPF_LD_IMM64_RAW_FULL(BPF_REG_1, BPF_PSEUDO_MAP_IDX_VALUE,
-					 0, 0, 0, off));
-	emit(gen, BPF_STX_MEM(BPF_DW, BPF_REG_1, BPF_REG_0, 0));
-}
-
-static void move_blob2blob(struct bpf_gen *gen, int off, int size, int blob_off)
-{
-	emit2(gen, BPF_LD_IMM64_RAW_FULL(BPF_REG_2, BPF_PSEUDO_MAP_IDX_VALUE,
-					 0, 0, 0, blob_off));
-	emit(gen, BPF_LDX_MEM(insn_bytes_to_bpf_size(size), BPF_REG_0, BPF_REG_2, 0));
-	emit2(gen, BPF_LD_IMM64_RAW_FULL(BPF_REG_1, BPF_PSEUDO_MAP_IDX_VALUE,
-					 0, 0, 0, off));
-	emit(gen, BPF_STX_MEM(insn_bytes_to_bpf_size(size), BPF_REG_1, BPF_REG_0, 0));
-}
-
-static void move_blob2ctx(struct bpf_gen *gen, int ctx_off, int size, int blob_off)
-{
-	emit2(gen, BPF_LD_IMM64_RAW_FULL(BPF_REG_1, BPF_PSEUDO_MAP_IDX_VALUE,
-					 0, 0, 0, blob_off));
-	emit(gen, BPF_LDX_MEM(insn_bytes_to_bpf_size(size), BPF_REG_0, BPF_REG_1, 0));
-	emit(gen, BPF_STX_MEM(insn_bytes_to_bpf_size(size), BPF_REG_6, BPF_REG_0, ctx_off));
-}
-
-static void move_ctx2blob(struct bpf_gen *gen, int off, int size, int ctx_off,
-				   bool check_non_zero)
-{
-	emit(gen, BPF_LDX_MEM(insn_bytes_to_bpf_size(size), BPF_REG_0, BPF_REG_6, ctx_off));
-	if (check_non_zero)
-		/* If value in ctx is zero don't update the blob.
-		 * For example: when ctx->map.max_entries == 0, keep default max_entries from bpf.c
-		 */
-		emit(gen, BPF_JMP_IMM(BPF_JEQ, BPF_REG_0, 0, 3));
-	emit2(gen, BPF_LD_IMM64_RAW_FULL(BPF_REG_1, BPF_PSEUDO_MAP_IDX_VALUE,
-					 0, 0, 0, off));
-	emit(gen, BPF_STX_MEM(insn_bytes_to_bpf_size(size), BPF_REG_1, BPF_REG_0, 0));
-}
-
-static void move_stack2blob(struct bpf_gen *gen, int off, int size, int stack_off)
-{
-	emit(gen, BPF_LDX_MEM(insn_bytes_to_bpf_size(size), BPF_REG_0, BPF_REG_10, stack_off));
-	emit2(gen, BPF_LD_IMM64_RAW_FULL(BPF_REG_1, BPF_PSEUDO_MAP_IDX_VALUE,
-					 0, 0, 0, off));
-	emit(gen, BPF_STX_MEM(insn_bytes_to_bpf_size(size), BPF_REG_1, BPF_REG_0, 0));
-}
-
-static void move_stack2ctx(struct bpf_gen *gen, int ctx_off, int size, int stack_off)
-{
-	emit(gen, BPF_LDX_MEM(insn_bytes_to_bpf_size(size), BPF_REG_0, BPF_REG_10, stack_off));
-	emit(gen, BPF_STX_MEM(insn_bytes_to_bpf_size(size), BPF_REG_6, BPF_REG_0, ctx_off));
-}
-
-static void emit_sys_bpf(struct bpf_gen *gen, int cmd, int attr, int attr_size)
-{
-	emit(gen, BPF_MOV64_IMM(BPF_REG_1, cmd));
-	emit2(gen, BPF_LD_IMM64_RAW_FULL(BPF_REG_2, BPF_PSEUDO_MAP_IDX_VALUE,
-					 0, 0, 0, attr));
-	emit(gen, BPF_MOV64_IMM(BPF_REG_3, attr_size));
-	emit(gen, BPF_EMIT_CALL(BPF_FUNC_sys_bpf));
-	/* remember the result in R7 */
-	emit(gen, BPF_MOV64_REG(BPF_REG_7, BPF_REG_0));
-}
-
-static bool is_simm16(__s64 value)
-{
-	return value == (__s64)(__s16)value;
-}
-
-static void emit_check_err(struct bpf_gen *gen)
-{
-	__s64 off = -(gen->insn_cur - gen->insn_start - gen->cleanup_label) / 8 - 1;
-
-	/* R7 contains result of last sys_bpf command.
-	 * if (R7 < 0) goto cleanup;
-	 */
-	if (is_simm16(off)) {
-		emit(gen, BPF_JMP_IMM(BPF_JSLT, BPF_REG_7, 0, off));
-	} else {
-		gen->error = -ERANGE;
-		emit(gen, BPF_JMP_IMM(BPF_JA, 0, 0, -1));
-	}
-}
-
-/* reg1 and reg2 should not be R1 - R5. They can be R0, R6 - R10 */
-static void emit_debug(struct bpf_gen *gen, int reg1, int reg2,
-		       const char *fmt, va_list args)
-{
-	char buf[1024];
-	int addr, len, ret;
-
-	if (!gen->log_level)
-		return;
-	ret = vsnprintf(buf, sizeof(buf), fmt, args);
-	if (ret < 1024 - 7 && reg1 >= 0 && reg2 < 0)
-		/* The special case to accommodate common debug_ret():
-		 * to avoid specifying BPF_REG_7 and adding " r=%%d" to
-		 * prints explicitly.
-		 */
-		strcat(buf, " r=%d");
-	len = strlen(buf) + 1;
-	addr = add_data(gen, buf, len);
-
-	emit2(gen, BPF_LD_IMM64_RAW_FULL(BPF_REG_1, BPF_PSEUDO_MAP_IDX_VALUE,
-					 0, 0, 0, addr));
-	emit(gen, BPF_MOV64_IMM(BPF_REG_2, len));
-	if (reg1 >= 0)
-		emit(gen, BPF_MOV64_REG(BPF_REG_3, reg1));
-	if (reg2 >= 0)
-		emit(gen, BPF_MOV64_REG(BPF_REG_4, reg2));
-	emit(gen, BPF_EMIT_CALL(BPF_FUNC_trace_printk));
-}
-
-static void debug_regs(struct bpf_gen *gen, int reg1, int reg2, const char *fmt, ...)
-{
-	va_list args;
-
-	va_start(args, fmt);
-	emit_debug(gen, reg1, reg2, fmt, args);
-	va_end(args);
-}
-
-static void debug_ret(struct bpf_gen *gen, const char *fmt, ...)
-{
-	va_list args;
-
-	va_start(args, fmt);
-	emit_debug(gen, BPF_REG_7, -1, fmt, args);
-	va_end(args);
-}
-
-static void __emit_sys_close(struct bpf_gen *gen)
-{
-	emit(gen, BPF_JMP_IMM(BPF_JSLE, BPF_REG_1, 0,
-			      /* 2 is the number of the following insns
-			       * * 6 is additional insns in debug_regs
-			       */
-			      2 + (gen->log_level ? 6 : 0)));
-	emit(gen, BPF_MOV64_REG(BPF_REG_9, BPF_REG_1));
-	emit(gen, BPF_EMIT_CALL(BPF_FUNC_sys_close));
-	debug_regs(gen, BPF_REG_9, BPF_REG_0, "close(%%d) = %%d");
-}
-
-static void emit_sys_close_stack(struct bpf_gen *gen, int stack_off)
-{
-	emit(gen, BPF_LDX_MEM(BPF_W, BPF_REG_1, BPF_REG_10, stack_off));
-	__emit_sys_close(gen);
-}
-
-static void emit_sys_close_blob(struct bpf_gen *gen, int blob_off)
-{
-	emit2(gen, BPF_LD_IMM64_RAW_FULL(BPF_REG_0, BPF_PSEUDO_MAP_IDX_VALUE,
-					 0, 0, 0, blob_off));
-	emit(gen, BPF_LDX_MEM(BPF_W, BPF_REG_1, BPF_REG_0, 0));
-	__emit_sys_close(gen);
-}
-
-int bpf_gen__finish(struct bpf_gen *gen)
-{
-	int i;
-
-	emit_sys_close_stack(gen, stack_off(btf_fd));
-	for (i = 0; i < gen->nr_progs; i++)
-		move_stack2ctx(gen,
-			       sizeof(struct bpf_loader_ctx) +
-			       sizeof(struct bpf_map_desc) * gen->nr_maps +
-			       sizeof(struct bpf_prog_desc) * i +
-			       offsetof(struct bpf_prog_desc, prog_fd), 4,
-			       stack_off(prog_fd[i]));
-	for (i = 0; i < gen->nr_maps; i++)
-		move_blob2ctx(gen,
-			      sizeof(struct bpf_loader_ctx) +
-			      sizeof(struct bpf_map_desc) * i +
-			      offsetof(struct bpf_map_desc, map_fd), 4,
-			      blob_fd_array_off(gen, i));
-	emit(gen, BPF_MOV64_IMM(BPF_REG_0, 0));
-	emit(gen, BPF_EXIT_INSN());
-	pr_debug("gen: finish %d\n", gen->error);
-	if (!gen->error) {
-		struct gen_loader_opts *opts = gen->opts;
-
-		opts->insns = gen->insn_start;
-		opts->insns_sz = gen->insn_cur - gen->insn_start;
-		opts->data = gen->data_start;
-		opts->data_sz = gen->data_cur - gen->data_start;
-	}
-	return gen->error;
-}
-
-void bpf_gen__free(struct bpf_gen *gen)
-{
-	if (!gen)
-		return;
-	free(gen->data_start);
-	free(gen->insn_start);
-	free(gen);
-}
-
-void bpf_gen__load_btf(struct bpf_gen *gen, const void *btf_raw_data,
-		       __u32 btf_raw_size)
-{
-	int attr_size = offsetofend(union bpf_attr, btf_log_level);
-	int btf_data, btf_load_attr;
-	union bpf_attr attr;
-
-	memset(&attr, 0, attr_size);
-	pr_debug("gen: load_btf: size %d\n", btf_raw_size);
-	btf_data = add_data(gen, btf_raw_data, btf_raw_size);
-
-	attr.btf_size = btf_raw_size;
-	btf_load_attr = add_data(gen, &attr, attr_size);
-
-	/* populate union bpf_attr with user provided log details */
-	move_ctx2blob(gen, attr_field(btf_load_attr, btf_log_level), 4,
-		      offsetof(struct bpf_loader_ctx, log_level), false);
-	move_ctx2blob(gen, attr_field(btf_load_attr, btf_log_size), 4,
-		      offsetof(struct bpf_loader_ctx, log_size), false);
-	move_ctx2blob(gen, attr_field(btf_load_attr, btf_log_buf), 8,
-		      offsetof(struct bpf_loader_ctx, log_buf), false);
-	/* populate union bpf_attr with a pointer to the BTF data */
-	emit_rel_store(gen, attr_field(btf_load_attr, btf), btf_data);
-	/* emit BTF_LOAD command */
-	emit_sys_bpf(gen, BPF_BTF_LOAD, btf_load_attr, attr_size);
-	debug_ret(gen, "btf_load size %d", btf_raw_size);
-	emit_check_err(gen);
-	/* remember btf_fd in the stack, if successful */
-	emit(gen, BPF_STX_MEM(BPF_W, BPF_REG_10, BPF_REG_7, stack_off(btf_fd)));
-}
-
-void bpf_gen__map_create(struct bpf_gen *gen,
-			 struct bpf_create_map_attr *map_attr, int map_idx)
-{
-	int attr_size = offsetofend(union bpf_attr, btf_vmlinux_value_type_id);
-	bool close_inner_map_fd = false;
-	int map_create_attr, idx;
-	union bpf_attr attr;
-
-	memset(&attr, 0, attr_size);
-	attr.map_type = map_attr->map_type;
-	attr.key_size = map_attr->key_size;
-	attr.value_size = map_attr->value_size;
-	attr.map_flags = map_attr->map_flags;
-	memcpy(attr.map_name, map_attr->name,
-	       min((unsigned)strlen(map_attr->name), BPF_OBJ_NAME_LEN - 1));
-	attr.numa_node = map_attr->numa_node;
-	attr.map_ifindex = map_attr->map_ifindex;
-	attr.max_entries = map_attr->max_entries;
-	switch (attr.map_type) {
-	case BPF_MAP_TYPE_PERF_EVENT_ARRAY:
-	case BPF_MAP_TYPE_CGROUP_ARRAY:
-	case BPF_MAP_TYPE_STACK_TRACE:
-	case BPF_MAP_TYPE_ARRAY_OF_MAPS:
-	case BPF_MAP_TYPE_HASH_OF_MAPS:
-	case BPF_MAP_TYPE_DEVMAP:
-	case BPF_MAP_TYPE_DEVMAP_HASH:
-	case BPF_MAP_TYPE_CPUMAP:
-	case BPF_MAP_TYPE_XSKMAP:
-	case BPF_MAP_TYPE_SOCKMAP:
-	case BPF_MAP_TYPE_SOCKHASH:
-	case BPF_MAP_TYPE_QUEUE:
-	case BPF_MAP_TYPE_STACK:
-	case BPF_MAP_TYPE_RINGBUF:
-		break;
-	default:
-		attr.btf_key_type_id = map_attr->btf_key_type_id;
-		attr.btf_value_type_id = map_attr->btf_value_type_id;
-	}
-
-	pr_debug("gen: map_create: %s idx %d type %d value_type_id %d\n",
-		 attr.map_name, map_idx, map_attr->map_type, attr.btf_value_type_id);
-
-	map_create_attr = add_data(gen, &attr, attr_size);
-	if (attr.btf_value_type_id)
-		/* populate union bpf_attr with btf_fd saved in the stack earlier */
-		move_stack2blob(gen, attr_field(map_create_attr, btf_fd), 4,
-				stack_off(btf_fd));
-	switch (attr.map_type) {
-	case BPF_MAP_TYPE_ARRAY_OF_MAPS:
-	case BPF_MAP_TYPE_HASH_OF_MAPS:
-		move_stack2blob(gen, attr_field(map_create_attr, inner_map_fd), 4,
-				stack_off(inner_map_fd));
-		close_inner_map_fd = true;
-		break;
-	default:
-		break;
-	}
-	/* conditionally update max_entries */
-	if (map_idx >= 0)
-		move_ctx2blob(gen, attr_field(map_create_attr, max_entries), 4,
-			      sizeof(struct bpf_loader_ctx) +
-			      sizeof(struct bpf_map_desc) * map_idx +
-			      offsetof(struct bpf_map_desc, max_entries),
-			      true /* check that max_entries != 0 */);
-	/* emit MAP_CREATE command */
-	emit_sys_bpf(gen, BPF_MAP_CREATE, map_create_attr, attr_size);
-	debug_ret(gen, "map_create %s idx %d type %d value_size %d value_btf_id %d",
-		  attr.map_name, map_idx, map_attr->map_type, attr.value_size,
-		  attr.btf_value_type_id);
-	emit_check_err(gen);
-	/* remember map_fd in the stack, if successful */
-	if (map_idx < 0) {
-		/* This bpf_gen__map_create() function is called with map_idx >= 0
-		 * for all maps that libbpf loading logic tracks.
-		 * It's called with -1 to create an inner map.
-		 */
-		emit(gen, BPF_STX_MEM(BPF_W, BPF_REG_10, BPF_REG_7,
-				      stack_off(inner_map_fd)));
-	} else if (map_idx != gen->nr_maps) {
-		gen->error = -EDOM; /* internal bug */
-		return;
-	} else {
-		/* add_map_fd does gen->nr_maps++ */
-		idx = add_map_fd(gen);
-		emit2(gen, BPF_LD_IMM64_RAW_FULL(BPF_REG_1, BPF_PSEUDO_MAP_IDX_VALUE,
-						 0, 0, 0, blob_fd_array_off(gen, idx)));
-		emit(gen, BPF_STX_MEM(BPF_W, BPF_REG_1, BPF_REG_7, 0));
-	}
-	if (close_inner_map_fd)
-		emit_sys_close_stack(gen, stack_off(inner_map_fd));
-}
-
-void bpf_gen__record_attach_target(struct bpf_gen *gen, const char *attach_name,
-				   enum bpf_attach_type type)
-{
-	const char *prefix;
-	int kind, ret;
-
-	btf_get_kernel_prefix_kind(type, &prefix, &kind);
-	gen->attach_kind = kind;
-	ret = snprintf(gen->attach_target, sizeof(gen->attach_target), "%s%s",
-		       prefix, attach_name);
-	if (ret == sizeof(gen->attach_target))
-		gen->error = -ENOSPC;
-}
-
-static void emit_find_attach_target(struct bpf_gen *gen)
-{
-	int name, len = strlen(gen->attach_target) + 1;
-
-	pr_debug("gen: find_attach_tgt %s %d\n", gen->attach_target, gen->attach_kind);
-	name = add_data(gen, gen->attach_target, len);
-
-	emit2(gen, BPF_LD_IMM64_RAW_FULL(BPF_REG_1, BPF_PSEUDO_MAP_IDX_VALUE,
-					 0, 0, 0, name));
-	emit(gen, BPF_MOV64_IMM(BPF_REG_2, len));
-	emit(gen, BPF_MOV64_IMM(BPF_REG_3, gen->attach_kind));
-	emit(gen, BPF_MOV64_IMM(BPF_REG_4, 0));
-	emit(gen, BPF_EMIT_CALL(BPF_FUNC_btf_find_by_name_kind));
-	emit(gen, BPF_MOV64_REG(BPF_REG_7, BPF_REG_0));
-	debug_ret(gen, "find_by_name_kind(%s,%d)",
-		  gen->attach_target, gen->attach_kind);
-	emit_check_err(gen);
-	/* if successful, btf_id is in lower 32-bit of R7 and
-	 * btf_obj_fd is in upper 32-bit
-	 */
-}
-
-void bpf_gen__record_extern(struct bpf_gen *gen, const char *name, bool is_weak,
-			    int kind, int insn_idx)
-{
-	struct ksym_relo_desc *relo;
-
-	relo = libbpf_reallocarray(gen->relos, gen->relo_cnt + 1, sizeof(*relo));
-	if (!relo) {
-		gen->error = -ENOMEM;
-		return;
-	}
-	gen->relos = relo;
-	relo += gen->relo_cnt;
-	relo->name = name;
-	relo->is_weak = is_weak;
-	relo->kind = kind;
-	relo->insn_idx = insn_idx;
-	gen->relo_cnt++;
-}
-
-/* returns existing ksym_desc with ref incremented, or inserts a new one */
-static struct ksym_desc *get_ksym_desc(struct bpf_gen *gen, struct ksym_relo_desc *relo)
-{
-	struct ksym_desc *kdesc;
-
-	for (int i = 0; i < gen->nr_ksyms; i++) {
-		if (!strcmp(gen->ksyms[i].name, relo->name)) {
-			gen->ksyms[i].ref++;
-			return &gen->ksyms[i];
-		}
-	}
-	kdesc = libbpf_reallocarray(gen->ksyms, gen->nr_ksyms + 1, sizeof(*kdesc));
-	if (!kdesc) {
-		gen->error = -ENOMEM;
-		return NULL;
-	}
-	gen->ksyms = kdesc;
-	kdesc = &gen->ksyms[gen->nr_ksyms++];
-	kdesc->name = relo->name;
-	kdesc->kind = relo->kind;
-	kdesc->ref = 1;
-	kdesc->off = 0;
-	kdesc->insn = 0;
-	return kdesc;
-}
-
-/* Overwrites BPF_REG_{0, 1, 2, 3, 4, 7}
- * Returns result in BPF_REG_7
- */
-static void emit_bpf_find_by_name_kind(struct bpf_gen *gen, struct ksym_relo_desc *relo)
-{
-	int name_off, len = strlen(relo->name) + 1;
-
-	name_off = add_data(gen, relo->name, len);
-	emit2(gen, BPF_LD_IMM64_RAW_FULL(BPF_REG_1, BPF_PSEUDO_MAP_IDX_VALUE,
-					 0, 0, 0, name_off));
-	emit(gen, BPF_MOV64_IMM(BPF_REG_2, len));
-	emit(gen, BPF_MOV64_IMM(BPF_REG_3, relo->kind));
-	emit(gen, BPF_MOV64_IMM(BPF_REG_4, 0));
-	emit(gen, BPF_EMIT_CALL(BPF_FUNC_btf_find_by_name_kind));
-	emit(gen, BPF_MOV64_REG(BPF_REG_7, BPF_REG_0));
-	debug_ret(gen, "find_by_name_kind(%s,%d)", relo->name, relo->kind);
-}
-
-/* Expects:
- * BPF_REG_8 - pointer to instruction
- *
- * We need to reuse BTF fd for same symbol otherwise each relocation takes a new
- * index, while kernel limits total kfunc BTFs to 256. For duplicate symbols,
- * this would mean a new BTF fd index for each entry. By pairing symbol name
- * with index, we get the insn->imm, insn->off pairing that kernel uses for
- * kfunc_tab, which becomes the effective limit even though all of them may
- * share same index in fd_array (such that kfunc_btf_tab has 1 element).
- */
-static void emit_relo_kfunc_btf(struct bpf_gen *gen, struct ksym_relo_desc *relo, int insn)
-{
-	struct ksym_desc *kdesc;
-	int btf_fd_idx;
-
-	kdesc = get_ksym_desc(gen, relo);
-	if (!kdesc)
-		return;
-	/* try to copy from existing bpf_insn */
-	if (kdesc->ref > 1) {
-		move_blob2blob(gen, insn + offsetof(struct bpf_insn, imm), 4,
-			       kdesc->insn + offsetof(struct bpf_insn, imm));
-		move_blob2blob(gen, insn + offsetof(struct bpf_insn, off), 2,
-			       kdesc->insn + offsetof(struct bpf_insn, off));
-		goto log;
-	}
-	/* remember insn offset, so we can copy BTF ID and FD later */
-	kdesc->insn = insn;
-	emit_bpf_find_by_name_kind(gen, relo);
-	if (!relo->is_weak)
-		emit_check_err(gen);
-	/* get index in fd_array to store BTF FD at */
-	btf_fd_idx = add_kfunc_btf_fd(gen);
-	if (btf_fd_idx > INT16_MAX) {
-		pr_warn("BTF fd off %d for kfunc %s exceeds INT16_MAX, cannot process relocation\n",
-			btf_fd_idx, relo->name);
-		gen->error = -E2BIG;
-		return;
-	}
-	kdesc->off = btf_fd_idx;
-	/* set a default value for imm */
-	emit(gen, BPF_ST_MEM(BPF_W, BPF_REG_8, offsetof(struct bpf_insn, imm), 0));
-	/* skip success case store if ret < 0 */
-	emit(gen, BPF_JMP_IMM(BPF_JSLT, BPF_REG_7, 0, 1));
-	/* store btf_id into insn[insn_idx].imm */
-	emit(gen, BPF_STX_MEM(BPF_W, BPF_REG_8, BPF_REG_7, offsetof(struct bpf_insn, imm)));
-	/* load fd_array slot pointer */
-	emit2(gen, BPF_LD_IMM64_RAW_FULL(BPF_REG_0, BPF_PSEUDO_MAP_IDX_VALUE,
-					 0, 0, 0, blob_fd_array_off(gen, btf_fd_idx)));
-	/* skip store of BTF fd if ret < 0 */
-	emit(gen, BPF_JMP_IMM(BPF_JSLT, BPF_REG_7, 0, 3));
-	/* store BTF fd in slot */
-	emit(gen, BPF_MOV64_REG(BPF_REG_9, BPF_REG_7));
-	emit(gen, BPF_ALU64_IMM(BPF_RSH, BPF_REG_9, 32));
-	emit(gen, BPF_STX_MEM(BPF_W, BPF_REG_0, BPF_REG_9, 0));
-	/* set a default value for off */
-	emit(gen, BPF_ST_MEM(BPF_H, BPF_REG_8, offsetof(struct bpf_insn, off), 0));
-	/* skip insn->off store if ret < 0 */
-	emit(gen, BPF_JMP_IMM(BPF_JSLT, BPF_REG_7, 0, 2));
-	/* skip if vmlinux BTF */
-	emit(gen, BPF_JMP_IMM(BPF_JEQ, BPF_REG_9, 0, 1));
-	/* store index into insn[insn_idx].off */
-	emit(gen, BPF_ST_MEM(BPF_H, BPF_REG_8, offsetof(struct bpf_insn, off), btf_fd_idx));
-log:
-	if (!gen->log_level)
-		return;
-	emit(gen, BPF_LDX_MEM(BPF_W, BPF_REG_7, BPF_REG_8,
-			      offsetof(struct bpf_insn, imm)));
-	emit(gen, BPF_LDX_MEM(BPF_H, BPF_REG_9, BPF_REG_8,
-			      offsetof(struct bpf_insn, off)));
-	debug_regs(gen, BPF_REG_7, BPF_REG_9, " func (%s:count=%d): imm: %%d, off: %%d",
-		   relo->name, kdesc->ref);
-	emit2(gen, BPF_LD_IMM64_RAW_FULL(BPF_REG_0, BPF_PSEUDO_MAP_IDX_VALUE,
-					 0, 0, 0, blob_fd_array_off(gen, kdesc->off)));
-	emit(gen, BPF_LDX_MEM(BPF_W, BPF_REG_9, BPF_REG_0, 0));
-	debug_regs(gen, BPF_REG_9, -1, " func (%s:count=%d): btf_fd",
-		   relo->name, kdesc->ref);
-}
-
-/* Expects:
- * BPF_REG_8 - pointer to instruction
- */
-static void emit_relo_ksym_btf(struct bpf_gen *gen, struct ksym_relo_desc *relo, int insn)
-{
-	struct ksym_desc *kdesc;
-
-	kdesc = get_ksym_desc(gen, relo);
-	if (!kdesc)
-		return;
-	/* try to copy from existing ldimm64 insn */
-	if (kdesc->ref > 1) {
-		move_blob2blob(gen, insn + offsetof(struct bpf_insn, imm), 4,
-			       kdesc->insn + offsetof(struct bpf_insn, imm));
-		move_blob2blob(gen, insn + sizeof(struct bpf_insn) + offsetof(struct bpf_insn, imm), 4,
-			       kdesc->insn + sizeof(struct bpf_insn) + offsetof(struct bpf_insn, imm));
-		goto log;
-	}
-	/* remember insn offset, so we can copy BTF ID and FD later */
-	kdesc->insn = insn;
-	emit_bpf_find_by_name_kind(gen, relo);
-	emit_check_err(gen);
-	/* store btf_id into insn[insn_idx].imm */
-	emit(gen, BPF_STX_MEM(BPF_W, BPF_REG_8, BPF_REG_7, offsetof(struct bpf_insn, imm)));
-	/* store btf_obj_fd into insn[insn_idx + 1].imm */
-	emit(gen, BPF_ALU64_IMM(BPF_RSH, BPF_REG_7, 32));
-	emit(gen, BPF_STX_MEM(BPF_W, BPF_REG_8, BPF_REG_7,
-			      sizeof(struct bpf_insn) + offsetof(struct bpf_insn, imm)));
-log:
-	if (!gen->log_level)
-		return;
-	emit(gen, BPF_LDX_MEM(BPF_W, BPF_REG_7, BPF_REG_8,
-			      offsetof(struct bpf_insn, imm)));
-	emit(gen, BPF_LDX_MEM(BPF_H, BPF_REG_9, BPF_REG_8, sizeof(struct bpf_insn) +
-			      offsetof(struct bpf_insn, imm)));
-	debug_regs(gen, BPF_REG_7, BPF_REG_9, " var (%s:count=%d): imm: %%d, fd: %%d",
-		   relo->name, kdesc->ref);
-}
-
-static void emit_relo(struct bpf_gen *gen, struct ksym_relo_desc *relo, int insns)
-{
-	int insn;
-
-	pr_debug("gen: emit_relo (%d): %s at %d\n", relo->kind, relo->name, relo->insn_idx);
-	insn = insns + sizeof(struct bpf_insn) * relo->insn_idx;
-	emit2(gen, BPF_LD_IMM64_RAW_FULL(BPF_REG_8, BPF_PSEUDO_MAP_IDX_VALUE, 0, 0, 0, insn));
-	switch (relo->kind) {
-	case BTF_KIND_VAR:
-		emit_relo_ksym_btf(gen, relo, insn);
-		break;
-	case BTF_KIND_FUNC:
-		emit_relo_kfunc_btf(gen, relo, insn);
-		break;
-	default:
-		pr_warn("Unknown relocation kind '%d'\n", relo->kind);
-		gen->error = -EDOM;
-		return;
-	}
-}
-
-static void emit_relos(struct bpf_gen *gen, int insns)
-{
-	int i;
-
-	for (i = 0; i < gen->relo_cnt; i++)
-		emit_relo(gen, gen->relos + i, insns);
-}
-
-static void cleanup_relos(struct bpf_gen *gen, int insns)
-{
-	int i, insn;
-
-	for (i = 0; i < gen->nr_ksyms; i++) {
-		if (gen->ksyms[i].kind == BTF_KIND_VAR) {
-			/* close fd recorded in insn[insn_idx + 1].imm */
-			insn = gen->ksyms[i].insn;
-			insn += sizeof(struct bpf_insn) + offsetof(struct bpf_insn, imm);
-			emit_sys_close_blob(gen, insn);
-		} else { /* BTF_KIND_FUNC */
-			emit_sys_close_blob(gen, blob_fd_array_off(gen, gen->ksyms[i].off));
-			if (gen->ksyms[i].off < MAX_FD_ARRAY_SZ)
-				gen->nr_fd_array--;
-		}
-	}
-	if (gen->nr_ksyms) {
-		free(gen->ksyms);
-		gen->nr_ksyms = 0;
-		gen->ksyms = NULL;
-	}
-	if (gen->relo_cnt) {
-		free(gen->relos);
-		gen->relo_cnt = 0;
-		gen->relos = NULL;
-	}
-}
-
-void bpf_gen__prog_load(struct bpf_gen *gen,
-			struct bpf_prog_load_params *load_attr, int prog_idx)
-{
-	int attr_size = offsetofend(union bpf_attr, fd_array);
-	int prog_load_attr, license, insns, func_info, line_info;
-	union bpf_attr attr;
-
-	memset(&attr, 0, attr_size);
-	pr_debug("gen: prog_load: type %d insns_cnt %zd\n",
-		 load_attr->prog_type, load_attr->insn_cnt);
-	/* add license string to blob of bytes */
-	license = add_data(gen, load_attr->license, strlen(load_attr->license) + 1);
-	/* add insns to blob of bytes */
-	insns = add_data(gen, load_attr->insns,
-			 load_attr->insn_cnt * sizeof(struct bpf_insn));
-
-	attr.prog_type = load_attr->prog_type;
-	attr.expected_attach_type = load_attr->expected_attach_type;
-	attr.attach_btf_id = load_attr->attach_btf_id;
-	attr.prog_ifindex = load_attr->prog_ifindex;
-	attr.kern_version = 0;
-	attr.insn_cnt = (__u32)load_attr->insn_cnt;
-	attr.prog_flags = load_attr->prog_flags;
-
-	attr.func_info_rec_size = load_attr->func_info_rec_size;
-	attr.func_info_cnt = load_attr->func_info_cnt;
-	func_info = add_data(gen, load_attr->func_info,
-			     attr.func_info_cnt * attr.func_info_rec_size);
-
-	attr.line_info_rec_size = load_attr->line_info_rec_size;
-	attr.line_info_cnt = load_attr->line_info_cnt;
-	line_info = add_data(gen, load_attr->line_info,
-			     attr.line_info_cnt * attr.line_info_rec_size);
-
-	memcpy(attr.prog_name, load_attr->name,
-	       min((unsigned)strlen(load_attr->name), BPF_OBJ_NAME_LEN - 1));
-	prog_load_attr = add_data(gen, &attr, attr_size);
-
-	/* populate union bpf_attr with a pointer to license */
-	emit_rel_store(gen, attr_field(prog_load_attr, license), license);
-
-	/* populate union bpf_attr with a pointer to instructions */
-	emit_rel_store(gen, attr_field(prog_load_attr, insns), insns);
-
-	/* populate union bpf_attr with a pointer to func_info */
-	emit_rel_store(gen, attr_field(prog_load_attr, func_info), func_info);
-
-	/* populate union bpf_attr with a pointer to line_info */
-	emit_rel_store(gen, attr_field(prog_load_attr, line_info), line_info);
-
-	/* populate union bpf_attr fd_array with a pointer to data where map_fds are saved */
-	emit_rel_store(gen, attr_field(prog_load_attr, fd_array), gen->fd_array);
-
-	/* populate union bpf_attr with user provided log details */
-	move_ctx2blob(gen, attr_field(prog_load_attr, log_level), 4,
-		      offsetof(struct bpf_loader_ctx, log_level), false);
-	move_ctx2blob(gen, attr_field(prog_load_attr, log_size), 4,
-		      offsetof(struct bpf_loader_ctx, log_size), false);
-	move_ctx2blob(gen, attr_field(prog_load_attr, log_buf), 8,
-		      offsetof(struct bpf_loader_ctx, log_buf), false);
-	/* populate union bpf_attr with btf_fd saved in the stack earlier */
-	move_stack2blob(gen, attr_field(prog_load_attr, prog_btf_fd), 4,
-			stack_off(btf_fd));
-	if (gen->attach_kind) {
-		emit_find_attach_target(gen);
-		/* populate union bpf_attr with btf_id and btf_obj_fd found by helper */
-		emit2(gen, BPF_LD_IMM64_RAW_FULL(BPF_REG_0, BPF_PSEUDO_MAP_IDX_VALUE,
-						 0, 0, 0, prog_load_attr));
-		emit(gen, BPF_STX_MEM(BPF_W, BPF_REG_0, BPF_REG_7,
-				      offsetof(union bpf_attr, attach_btf_id)));
-		emit(gen, BPF_ALU64_IMM(BPF_RSH, BPF_REG_7, 32));
-		emit(gen, BPF_STX_MEM(BPF_W, BPF_REG_0, BPF_REG_7,
-				      offsetof(union bpf_attr, attach_btf_obj_fd)));
-	}
-	emit_relos(gen, insns);
-	/* emit PROG_LOAD command */
-	emit_sys_bpf(gen, BPF_PROG_LOAD, prog_load_attr, attr_size);
-	debug_ret(gen, "prog_load %s insn_cnt %d", attr.prog_name, attr.insn_cnt);
-	/* successful or not, close btf module FDs used in extern ksyms and attach_btf_obj_fd */
-	cleanup_relos(gen, insns);
-	if (gen->attach_kind)
-		emit_sys_close_blob(gen,
-				    attr_field(prog_load_attr, attach_btf_obj_fd));
-	emit_check_err(gen);
-	/* remember prog_fd in the stack, if successful */
-	emit(gen, BPF_STX_MEM(BPF_W, BPF_REG_10, BPF_REG_7,
-			      stack_off(prog_fd[gen->nr_progs])));
-	gen->nr_progs++;
-}
-
-void bpf_gen__map_update_elem(struct bpf_gen *gen, int map_idx, void *pvalue,
-			      __u32 value_size)
-{
-	int attr_size = offsetofend(union bpf_attr, flags);
-	int map_update_attr, value, key;
-	union bpf_attr attr;
-	int zero = 0;
-
-	memset(&attr, 0, attr_size);
-	pr_debug("gen: map_update_elem: idx %d\n", map_idx);
-
-	value = add_data(gen, pvalue, value_size);
-	key = add_data(gen, &zero, sizeof(zero));
-
-	/* if (map_desc[map_idx].initial_value)
-	 *    copy_from_user(value, initial_value, value_size);
-	 */
-	emit(gen, BPF_LDX_MEM(BPF_DW, BPF_REG_3, BPF_REG_6,
-			      sizeof(struct bpf_loader_ctx) +
-			      sizeof(struct bpf_map_desc) * map_idx +
-			      offsetof(struct bpf_map_desc, initial_value)));
-	emit(gen, BPF_JMP_IMM(BPF_JEQ, BPF_REG_3, 0, 4));
-	emit2(gen, BPF_LD_IMM64_RAW_FULL(BPF_REG_1, BPF_PSEUDO_MAP_IDX_VALUE,
-					 0, 0, 0, value));
-	emit(gen, BPF_MOV64_IMM(BPF_REG_2, value_size));
-	emit(gen, BPF_EMIT_CALL(BPF_FUNC_copy_from_user));
-
-	map_update_attr = add_data(gen, &attr, attr_size);
-	move_blob2blob(gen, attr_field(map_update_attr, map_fd), 4,
-		       blob_fd_array_off(gen, map_idx));
-	emit_rel_store(gen, attr_field(map_update_attr, key), key);
-	emit_rel_store(gen, attr_field(map_update_attr, value), value);
-	/* emit MAP_UPDATE_ELEM command */
-	emit_sys_bpf(gen, BPF_MAP_UPDATE_ELEM, map_update_attr, attr_size);
-	debug_ret(gen, "update_elem idx %d value_size %d", map_idx, value_size);
-	emit_check_err(gen);
-}
-
-void bpf_gen__map_freeze(struct bpf_gen *gen, int map_idx)
-{
-	int attr_size = offsetofend(union bpf_attr, map_fd);
-	int map_freeze_attr;
-	union bpf_attr attr;
-
-	memset(&attr, 0, attr_size);
-	pr_debug("gen: map_freeze: idx %d\n", map_idx);
-	map_freeze_attr = add_data(gen, &attr, attr_size);
-	move_blob2blob(gen, attr_field(map_freeze_attr, map_fd), 4,
-		       blob_fd_array_off(gen, map_idx));
-	/* emit MAP_FREEZE command */
-	emit_sys_bpf(gen, BPF_MAP_FREEZE, map_freeze_attr, attr_size);
-	debug_ret(gen, "map_freeze");
-	emit_check_err(gen);
-}

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
 

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.h

@@ -18,7 +18,6 @@
 #include <linux/bpf.h>
 
 #include "libbpf_common.h"
-#include "libbpf_legacy.h"
 
 #ifdef __cplusplus
 extern "C" {
@@ -83,29 +82,19 @@ struct bpf_object_open_opts {
 	 * Non-relocatable instructions are replaced with invalid ones to
 	 * prevent accidental errors.
 	 * */
-	LIBBPF_DEPRECATED_SINCE(0, 6, "field has no effect")
 	bool relaxed_core_relocs;
 	/* maps that set the 'pinning' attribute in their definition will have
 	 * their pin_path attribute set to a file in this directory, and be
 	 * auto-pinned to that path on load; defaults to "/sys/fs/bpf".
 	 */
 	const char *pin_root_path;
-
-	LIBBPF_DEPRECATED_SINCE(0, 7, "use bpf_program__set_attach_target() on each individual bpf_program")
 	__u32 attach_prog_fd;
 	/* Additional kernel config content that augments and overrides
 	 * system Kconfig for CONFIG_xxx externs.
 	 */
 	const char *kconfig;
-	/* Path to the custom BTF to be used for BPF CO-RE relocations.
-	 * This custom BTF completely replaces the use of vmlinux BTF
-	 * for the purpose of CO-RE relocations.
-	 * NOTE: any other BPF feature (e.g., fentry/fexit programs,
-	 * struct_ops, etc) will need actual kernel BTF at /sys/kernel/btf/vmlinux.
-	 */
-	const char *btf_custom_path;
 };
-#define bpf_object_open_opts__last_field btf_custom_path
+#define bpf_object_open_opts__last_field kconfig
 
 LIBBPF_API struct bpf_object *bpf_object__open(const char *path);
 LIBBPF_API struct bpf_object *
@@ -150,12 +139,10 @@ struct bpf_object_load_attr {
 /* Load/unload object into/from kernel */
 LIBBPF_API int bpf_object__load(struct bpf_object *obj);
 LIBBPF_API int bpf_object__load_xattr(struct bpf_object_load_attr *attr);
-LIBBPF_DEPRECATED_SINCE(0, 6, "bpf_object__unload() is deprecated, use bpf_object__close() instead")
 LIBBPF_API int bpf_object__unload(struct bpf_object *obj);
 
 LIBBPF_API const char *bpf_object__name(const struct bpf_object *obj);
 LIBBPF_API unsigned int bpf_object__kversion(const struct bpf_object *obj);
-LIBBPF_API int bpf_object__set_kversion(struct bpf_object *obj, __u32 kern_version);
 
 struct btf;
 LIBBPF_API struct btf *bpf_object__btf(const struct bpf_object *obj);
@@ -190,22 +177,16 @@ LIBBPF_API int libbpf_find_vmlinux_btf_id(const char *name,
 
 /* Accessors of bpf_program */
 struct bpf_program;
-LIBBPF_API LIBBPF_DEPRECATED_SINCE(0, 7, "use bpf_object__next_program() instead")
-struct bpf_program *bpf_program__next(struct bpf_program *prog,
-				      const struct bpf_object *obj);
-LIBBPF_API struct bpf_program *
-bpf_object__next_program(const struct bpf_object *obj, struct bpf_program *prog);
+LIBBPF_API struct bpf_program *bpf_program__next(struct bpf_program *prog,
+						 const struct bpf_object *obj);
 
-#define bpf_object__for_each_program(pos, obj)			\
-	for ((pos) = bpf_object__next_program((obj), NULL);	\
-	     (pos) != NULL;					\
-	     (pos) = bpf_object__next_program((obj), (pos)))
+#define bpf_object__for_each_program(pos, obj)		\
+	for ((pos) = bpf_program__next(NULL, (obj));	\
+	     (pos) != NULL;				\
+	     (pos) = bpf_program__next((pos), (obj)))
 
-LIBBPF_API LIBBPF_DEPRECATED_SINCE(0, 7, "use bpf_object__prev_program() instead")
-struct bpf_program *bpf_program__prev(struct bpf_program *prog,
-				      const struct bpf_object *obj);
-LIBBPF_API struct bpf_program *
-bpf_object__prev_program(const struct bpf_object *obj, struct bpf_program *prog);
+LIBBPF_API struct bpf_program *bpf_program__prev(struct bpf_program *prog,
+						 const struct bpf_object *obj);
 
 typedef void (*bpf_program_clear_priv_t)(struct bpf_program *, void *);
 
@@ -217,11 +198,8 @@ LIBBPF_API void bpf_program__set_ifindex(struct bpf_program *prog,
 					 __u32 ifindex);
 
 LIBBPF_API const char *bpf_program__name(const struct bpf_program *prog);
-LIBBPF_API const char *bpf_program__section_name(const struct bpf_program *prog);
-LIBBPF_API LIBBPF_DEPRECATED("BPF program title is confusing term; please use bpf_program__section_name() instead")
-const char *bpf_program__title(const struct bpf_program *prog, bool needs_copy);
-LIBBPF_API bool bpf_program__autoload(const struct bpf_program *prog);
-LIBBPF_API int bpf_program__set_autoload(struct bpf_program *prog, bool autoload);
+LIBBPF_API const char *bpf_program__title(const struct bpf_program *prog,
+					  bool needs_copy);
 
 /* returns program size in bytes */
 LIBBPF_API size_t bpf_program__size(const struct bpf_program *prog);
@@ -249,120 +227,46 @@ LIBBPF_API int bpf_link__unpin(struct bpf_link *link);
 LIBBPF_API int bpf_link__update_program(struct bpf_link *link,
 					struct bpf_program *prog);
 LIBBPF_API void bpf_link__disconnect(struct bpf_link *link);
-LIBBPF_API int bpf_link__detach(struct bpf_link *link);
 LIBBPF_API int bpf_link__destroy(struct bpf_link *link);
 
 LIBBPF_API struct bpf_link *
-bpf_program__attach(const struct bpf_program *prog);
-
-struct bpf_perf_event_opts {
-	/* size of this struct, for forward/backward compatiblity */
-	size_t sz;
-	/* custom user-provided value fetchable through bpf_get_attach_cookie() */
-	__u64 bpf_cookie;
-};
-#define bpf_perf_event_opts__last_field bpf_cookie
-
+bpf_program__attach(struct bpf_program *prog);
 LIBBPF_API struct bpf_link *
-bpf_program__attach_perf_event(const struct bpf_program *prog, int pfd);
-
+bpf_program__attach_perf_event(struct bpf_program *prog, int pfd);
 LIBBPF_API struct bpf_link *
-bpf_program__attach_perf_event_opts(const struct bpf_program *prog, int pfd,
-				    const struct bpf_perf_event_opts *opts);
-
-struct bpf_kprobe_opts {
-	/* size of this struct, for forward/backward compatiblity */
-	size_t sz;
-	/* custom user-provided value fetchable through bpf_get_attach_cookie() */
-	__u64 bpf_cookie;
-	/* function's offset to install kprobe to */
-	size_t offset;
-	/* kprobe is return probe */
-	bool retprobe;
-	size_t :0;
-};
-#define bpf_kprobe_opts__last_field retprobe
-
-LIBBPF_API struct bpf_link *
-bpf_program__attach_kprobe(const struct bpf_program *prog, bool retprobe,
+bpf_program__attach_kprobe(struct bpf_program *prog, bool retprobe,
 			   const char *func_name);
 LIBBPF_API struct bpf_link *
-bpf_program__attach_kprobe_opts(const struct bpf_program *prog,
-                                const char *func_name,
-                                const struct bpf_kprobe_opts *opts);
-
-struct bpf_uprobe_opts {
-	/* size of this struct, for forward/backward compatiblity */
-	size_t sz;
-	/* offset of kernel reference counted USDT semaphore, added in
-	 * a6ca88b241d5 ("trace_uprobe: support reference counter in fd-based uprobe")
-	 */
-	size_t ref_ctr_offset;
-	/* custom user-provided value fetchable through bpf_get_attach_cookie() */
-	__u64 bpf_cookie;
-	/* uprobe is return probe, invoked at function return time */
-	bool retprobe;
-	size_t :0;
-};
-#define bpf_uprobe_opts__last_field retprobe
-
-LIBBPF_API struct bpf_link *
-bpf_program__attach_uprobe(const struct bpf_program *prog, bool retprobe,
+bpf_program__attach_uprobe(struct bpf_program *prog, bool retprobe,
 			   pid_t pid, const char *binary_path,
 			   size_t func_offset);
 LIBBPF_API struct bpf_link *
-bpf_program__attach_uprobe_opts(const struct bpf_program *prog, pid_t pid,
-				const char *binary_path, size_t func_offset,
-				const struct bpf_uprobe_opts *opts);
-
-struct bpf_tracepoint_opts {
-	/* size of this struct, for forward/backward compatiblity */
-	size_t sz;
-	/* custom user-provided value fetchable through bpf_get_attach_cookie() */
-	__u64 bpf_cookie;
-};
-#define bpf_tracepoint_opts__last_field bpf_cookie
-
-LIBBPF_API struct bpf_link *
-bpf_program__attach_tracepoint(const struct bpf_program *prog,
+bpf_program__attach_tracepoint(struct bpf_program *prog,
 			       const char *tp_category,
 			       const char *tp_name);
 LIBBPF_API struct bpf_link *
-bpf_program__attach_tracepoint_opts(const struct bpf_program *prog,
-				    const char *tp_category,
-				    const char *tp_name,
-				    const struct bpf_tracepoint_opts *opts);
-
-LIBBPF_API struct bpf_link *
-bpf_program__attach_raw_tracepoint(const struct bpf_program *prog,
+bpf_program__attach_raw_tracepoint(struct bpf_program *prog,
 				   const char *tp_name);
 LIBBPF_API struct bpf_link *
-bpf_program__attach_trace(const struct bpf_program *prog);
+bpf_program__attach_trace(struct bpf_program *prog);
 LIBBPF_API struct bpf_link *
-bpf_program__attach_lsm(const struct bpf_program *prog);
+bpf_program__attach_lsm(struct bpf_program *prog);
 LIBBPF_API struct bpf_link *
-bpf_program__attach_cgroup(const struct bpf_program *prog, int cgroup_fd);
+bpf_program__attach_cgroup(struct bpf_program *prog, int cgroup_fd);
 LIBBPF_API struct bpf_link *
-bpf_program__attach_netns(const struct bpf_program *prog, int netns_fd);
-LIBBPF_API struct bpf_link *
-bpf_program__attach_xdp(const struct bpf_program *prog, int ifindex);
-LIBBPF_API struct bpf_link *
-bpf_program__attach_freplace(const struct bpf_program *prog,
-			     int target_fd, const char *attach_func_name);
+bpf_program__attach_netns(struct bpf_program *prog, int netns_fd);
 
 struct bpf_map;
 
-LIBBPF_API struct bpf_link *bpf_map__attach_struct_ops(const struct bpf_map *map);
+LIBBPF_API struct bpf_link *bpf_map__attach_struct_ops(struct bpf_map *map);
 
 struct bpf_iter_attach_opts {
 	size_t sz; /* size of this struct for forward/backward compatibility */
-	union bpf_iter_link_info *link_info;
-	__u32 link_info_len;
 };
-#define bpf_iter_attach_opts__last_field link_info_len
+#define bpf_iter_attach_opts__last_field sz
 
 LIBBPF_API struct bpf_link *
-bpf_program__attach_iter(const struct bpf_program *prog,
+bpf_program__attach_iter(struct bpf_program *prog,
 			 const struct bpf_iter_attach_opts *opts);
 
 struct bpf_insn;
@@ -444,14 +348,13 @@ LIBBPF_API int bpf_program__set_perf_event(struct bpf_program *prog);
 LIBBPF_API int bpf_program__set_tracing(struct bpf_program *prog);
 LIBBPF_API int bpf_program__set_struct_ops(struct bpf_program *prog);
 LIBBPF_API int bpf_program__set_extension(struct bpf_program *prog);
-LIBBPF_API int bpf_program__set_sk_lookup(struct bpf_program *prog);
 
-LIBBPF_API enum bpf_prog_type bpf_program__get_type(const struct bpf_program *prog);
+LIBBPF_API enum bpf_prog_type bpf_program__get_type(struct bpf_program *prog);
 LIBBPF_API void bpf_program__set_type(struct bpf_program *prog,
 				      enum bpf_prog_type type);
 
 LIBBPF_API enum bpf_attach_type
-bpf_program__get_expected_attach_type(const struct bpf_program *prog);
+bpf_program__get_expected_attach_type(struct bpf_program *prog);
 LIBBPF_API void
 bpf_program__set_expected_attach_type(struct bpf_program *prog,
 				      enum bpf_attach_type type);
@@ -472,7 +375,6 @@ LIBBPF_API bool bpf_program__is_perf_event(const struct bpf_program *prog);
 LIBBPF_API bool bpf_program__is_tracing(const struct bpf_program *prog);
 LIBBPF_API bool bpf_program__is_struct_ops(const struct bpf_program *prog);
 LIBBPF_API bool bpf_program__is_extension(const struct bpf_program *prog);
-LIBBPF_API bool bpf_program__is_sk_lookup(const struct bpf_program *prog);
 
 /*
  * No need for __attribute__((packed)), all members of 'bpf_map_def'
@@ -488,13 +390,9 @@ struct bpf_map_def {
 	unsigned int map_flags;
 };
 
-/**
- * @brief **bpf_object__find_map_by_name()** returns BPF map of
- * the given name, if it exists within the passed BPF object
- * @param obj BPF object
- * @param name name of the BPF map
- * @return BPF map instance, if such map exists within the BPF object;
- * or NULL otherwise.
+/*
+ * The 'struct bpf_map' in include/linux/bpf.h is internal to the kernel,
+ * so no need to worry about a name clash.
  */
 LIBBPF_API struct bpf_map *
 bpf_object__find_map_by_name(const struct bpf_object *obj, const char *name);
@@ -509,59 +407,22 @@ bpf_object__find_map_fd_by_name(const struct bpf_object *obj, const char *name);
 LIBBPF_API struct bpf_map *
 bpf_object__find_map_by_offset(struct bpf_object *obj, size_t offset);
 
-LIBBPF_API LIBBPF_DEPRECATED_SINCE(0, 7, "use bpf_object__next_map() instead")
-struct bpf_map *bpf_map__next(const struct bpf_map *map, const struct bpf_object *obj);
 LIBBPF_API struct bpf_map *
-bpf_object__next_map(const struct bpf_object *obj, const struct bpf_map *map);
-
+bpf_map__next(const struct bpf_map *map, const struct bpf_object *obj);
 #define bpf_object__for_each_map(pos, obj)		\
-	for ((pos) = bpf_object__next_map((obj), NULL);	\
+	for ((pos) = bpf_map__next(NULL, (obj));	\
 	     (pos) != NULL;				\
-	     (pos) = bpf_object__next_map((obj), (pos)))
+	     (pos) = bpf_map__next((pos), (obj)))
 #define bpf_map__for_each bpf_object__for_each_map
 
-LIBBPF_API LIBBPF_DEPRECATED_SINCE(0, 7, "use bpf_object__prev_map() instead")
-struct bpf_map *bpf_map__prev(const struct bpf_map *map, const struct bpf_object *obj);
 LIBBPF_API struct bpf_map *
-bpf_object__prev_map(const struct bpf_object *obj, const struct bpf_map *map);
+bpf_map__prev(const struct bpf_map *map, const struct bpf_object *obj);
 
-/**
- * @brief **bpf_map__fd()** gets the file descriptor of the passed
- * BPF map
- * @param map the BPF map instance
- * @return the file descriptor; or -EINVAL in case of an error
- */
 LIBBPF_API int bpf_map__fd(const struct bpf_map *map);
-LIBBPF_API int bpf_map__reuse_fd(struct bpf_map *map, int fd);
-/* get map definition */
 LIBBPF_API const struct bpf_map_def *bpf_map__def(const struct bpf_map *map);
-/* get map name */
 LIBBPF_API const char *bpf_map__name(const struct bpf_map *map);
-/* get/set map type */
-LIBBPF_API enum bpf_map_type bpf_map__type(const struct bpf_map *map);
-LIBBPF_API int bpf_map__set_type(struct bpf_map *map, enum bpf_map_type type);
-/* get/set map size (max_entries) */
-LIBBPF_API __u32 bpf_map__max_entries(const struct bpf_map *map);
-LIBBPF_API int bpf_map__set_max_entries(struct bpf_map *map, __u32 max_entries);
-LIBBPF_API int bpf_map__resize(struct bpf_map *map, __u32 max_entries);
-/* get/set map flags */
-LIBBPF_API __u32 bpf_map__map_flags(const struct bpf_map *map);
-LIBBPF_API int bpf_map__set_map_flags(struct bpf_map *map, __u32 flags);
-/* get/set map NUMA node */
-LIBBPF_API __u32 bpf_map__numa_node(const struct bpf_map *map);
-LIBBPF_API int bpf_map__set_numa_node(struct bpf_map *map, __u32 numa_node);
-/* get/set map key size */
-LIBBPF_API __u32 bpf_map__key_size(const struct bpf_map *map);
-LIBBPF_API int bpf_map__set_key_size(struct bpf_map *map, __u32 size);
-/* get/set map value size */
-LIBBPF_API __u32 bpf_map__value_size(const struct bpf_map *map);
-LIBBPF_API int bpf_map__set_value_size(struct bpf_map *map, __u32 size);
-/* get map key/value BTF type IDs */
 LIBBPF_API __u32 bpf_map__btf_key_type_id(const struct bpf_map *map);
 LIBBPF_API __u32 bpf_map__btf_value_type_id(const struct bpf_map *map);
-/* get/set map if_index */
-LIBBPF_API __u32 bpf_map__ifindex(const struct bpf_map *map);
-LIBBPF_API int bpf_map__set_ifindex(struct bpf_map *map, __u32 ifindex);
 
 typedef void (*bpf_map_clear_priv_t)(struct bpf_map *, void *);
 LIBBPF_API int bpf_map__set_priv(struct bpf_map *map, void *priv,
@@ -569,59 +430,19 @@ LIBBPF_API int bpf_map__set_priv(struct bpf_map *map, void *priv,
 LIBBPF_API void *bpf_map__priv(const struct bpf_map *map);
 LIBBPF_API int bpf_map__set_initial_value(struct bpf_map *map,
 					  const void *data, size_t size);
-LIBBPF_API const void *bpf_map__initial_value(struct bpf_map *map, size_t *psize);
+LIBBPF_API int bpf_map__reuse_fd(struct bpf_map *map, int fd);
+LIBBPF_API int bpf_map__resize(struct bpf_map *map, __u32 max_entries);
 LIBBPF_API bool bpf_map__is_offload_neutral(const struct bpf_map *map);
-
-/**
- * @brief **bpf_map__is_internal()** tells the caller whether or not the
- * passed map is a special map created by libbpf automatically for things like
- * global variables, __ksym externs, Kconfig values, etc
- * @param map the bpf_map
- * @return true, if the map is an internal map; false, otherwise
- */
 LIBBPF_API bool bpf_map__is_internal(const struct bpf_map *map);
+LIBBPF_API void bpf_map__set_ifindex(struct bpf_map *map, __u32 ifindex);
 LIBBPF_API int bpf_map__set_pin_path(struct bpf_map *map, const char *path);
 LIBBPF_API const char *bpf_map__get_pin_path(const struct bpf_map *map);
-LIBBPF_API const char *bpf_map__pin_path(const struct bpf_map *map);
 LIBBPF_API bool bpf_map__is_pinned(const struct bpf_map *map);
 LIBBPF_API int bpf_map__pin(struct bpf_map *map, const char *path);
 LIBBPF_API int bpf_map__unpin(struct bpf_map *map, const char *path);
 
 LIBBPF_API int bpf_map__set_inner_map_fd(struct bpf_map *map, int fd);
-LIBBPF_API struct bpf_map *bpf_map__inner_map(struct bpf_map *map);
 
-/**
- * @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
- *
- * Many libbpf API functions which return pointers have logic to encode error
- * codes as pointers, and do not return NULL. Meaning **libbpf_get_error()**
- * should be used on the return value from these functions immediately after
- * calling the API function, with no intervening calls that could clobber the
- * `errno` variable. Consult the individual functions documentation to verify
- * if this logic applies should be used.
- *
- * For these API functions, if `libbpf_set_strict_mode(LIBBPF_STRICT_CLEAN_PTRS)`
- * is enabled, NULL is returned on error instead.
- *
- * If ptr is NULL, then errno should be already set by the failing
- * API, because libbpf never returns NULL on success and it now always
- * sets errno on error.
- *
- * Example usage:
- *
- *   struct perf_buffer *pb;
- *
- *   pb = perf_buffer__new(bpf_map__fd(obj->maps.events), PERF_BUFFER_PAGES, &opts);
- *   err = libbpf_get_error(pb);
- *   if (err) {
- *	  pb = NULL;
- *	  fprintf(stderr, "failed to open perf buffer: %d\n", err);
- *	  goto cleanup;
- *   }
- */
 LIBBPF_API long libbpf_get_error(const void *ptr);
 
 struct bpf_prog_load_attr {
@@ -638,7 +459,6 @@ LIBBPF_API int bpf_prog_load_xattr(const struct bpf_prog_load_attr *attr,
 LIBBPF_API int bpf_prog_load(const char *file, enum bpf_prog_type type,
 			     struct bpf_object **pobj, int *prog_fd);
 
-/* XDP related API */
 struct xdp_link_info {
 	__u32 prog_id;
 	__u32 drv_prog_id;
@@ -650,7 +470,6 @@ struct xdp_link_info {
 struct bpf_xdp_set_link_opts {
 	size_t sz;
 	int old_fd;
-	size_t :0;
 };
 #define bpf_xdp_set_link_opts__last_field old_fd
 
@@ -661,49 +480,6 @@ LIBBPF_API int bpf_get_link_xdp_id(int ifindex, __u32 *prog_id, __u32 flags);
 LIBBPF_API int bpf_get_link_xdp_info(int ifindex, struct xdp_link_info *info,
 				     size_t info_size, __u32 flags);
 
-/* TC related API */
-enum bpf_tc_attach_point {
-	BPF_TC_INGRESS = 1 << 0,
-	BPF_TC_EGRESS  = 1 << 1,
-	BPF_TC_CUSTOM  = 1 << 2,
-};
-
-#define BPF_TC_PARENT(a, b) 	\
-	((((a) << 16) & 0xFFFF0000U) | ((b) & 0x0000FFFFU))
-
-enum bpf_tc_flags {
-	BPF_TC_F_REPLACE = 1 << 0,
-};
-
-struct bpf_tc_hook {
-	size_t sz;
-	int ifindex;
-	enum bpf_tc_attach_point attach_point;
-	__u32 parent;
-	size_t :0;
-};
-#define bpf_tc_hook__last_field parent
-
-struct bpf_tc_opts {
-	size_t sz;
-	int prog_fd;
-	__u32 flags;
-	__u32 prog_id;
-	__u32 handle;
-	__u32 priority;
-	size_t :0;
-};
-#define bpf_tc_opts__last_field priority
-
-LIBBPF_API int bpf_tc_hook_create(struct bpf_tc_hook *hook);
-LIBBPF_API int bpf_tc_hook_destroy(struct bpf_tc_hook *hook);
-LIBBPF_API int bpf_tc_attach(const struct bpf_tc_hook *hook,
-			     struct bpf_tc_opts *opts);
-LIBBPF_API int bpf_tc_detach(const struct bpf_tc_hook *hook,
-			     const struct bpf_tc_opts *opts);
-LIBBPF_API int bpf_tc_query(const struct bpf_tc_hook *hook,
-			    struct bpf_tc_opts *opts);
-
 /* Ring buffer APIs */
 struct ring_buffer;
 
@@ -723,7 +499,6 @@ LIBBPF_API int ring_buffer__add(struct ring_buffer *rb, int map_fd,
 				ring_buffer_sample_fn sample_cb, void *ctx);
 LIBBPF_API int ring_buffer__poll(struct ring_buffer *rb, int timeout_ms);
 LIBBPF_API int ring_buffer__consume(struct ring_buffer *rb);
-LIBBPF_API int ring_buffer__epoll_fd(const struct ring_buffer *rb);
 
 /* Perf buffer APIs */
 struct perf_buffer;
@@ -780,12 +555,8 @@ perf_buffer__new_raw(int map_fd, size_t page_cnt,
 		     const struct perf_buffer_raw_opts *opts);
 
 LIBBPF_API void perf_buffer__free(struct perf_buffer *pb);
-LIBBPF_API int perf_buffer__epoll_fd(const struct perf_buffer *pb);
 LIBBPF_API int perf_buffer__poll(struct perf_buffer *pb, int timeout_ms);
 LIBBPF_API int perf_buffer__consume(struct perf_buffer *pb);
-LIBBPF_API int perf_buffer__consume_buffer(struct perf_buffer *pb, size_t buf_idx);
-LIBBPF_API size_t perf_buffer__buffer_cnt(const struct perf_buffer *pb);
-LIBBPF_API int perf_buffer__buffer_fd(const struct perf_buffer *pb, size_t buf_idx);
 
 typedef enum bpf_perf_event_ret
 	(*bpf_perf_event_print_t)(struct perf_event_header *hdr,
@@ -886,10 +657,9 @@ bpf_program__bpil_addr_to_offs(struct bpf_prog_info_linear *info_linear);
 LIBBPF_API void
 bpf_program__bpil_offs_to_addr(struct bpf_prog_info_linear *info_linear);
 
-/**
- * @brief **libbpf_num_possible_cpus()** is a helper function to get the
- * number of possible CPUs that the host kernel supports and expects.
- * @return number of possible CPUs; or error code on failure
+/*
+ * A helper function to get the number of possible CPUs before looking up
+ * per-CPU maps. Negative errno is returned on failure.
  *
  * Example usage:
  *
@@ -899,6 +669,7 @@ bpf_program__bpil_offs_to_addr(struct bpf_prog_info_linear *info_linear);
  *     }
  *     long values[ncpus];
  *     bpf_map_lookup_elem(per_cpu_map_fd, key, values);
+ *
  */
 LIBBPF_API int libbpf_num_possible_cpus(void);
 
@@ -918,7 +689,7 @@ struct bpf_object_skeleton {
 	size_t sz; /* size of this struct, for forward/backward compatibility */
 
 	const char *name;
-	const void *data;
+	void *data;
 	size_t data_sz;
 
 	struct bpf_object **obj;
@@ -940,45 +711,12 @@ LIBBPF_API int bpf_object__attach_skeleton(struct bpf_object_skeleton *s);
 LIBBPF_API void bpf_object__detach_skeleton(struct bpf_object_skeleton *s);
 LIBBPF_API void bpf_object__destroy_skeleton(struct bpf_object_skeleton *s);
 
-struct gen_loader_opts {
-	size_t sz; /* size of this struct, for forward/backward compatiblity */
-	const char *data;
-	const char *insns;
-	__u32 data_sz;
-	__u32 insns_sz;
-};
-
-#define gen_loader_opts__last_field insns_sz
-LIBBPF_API int bpf_object__gen_loader(struct bpf_object *obj,
-				      struct gen_loader_opts *opts);
-
 enum libbpf_tristate {
 	TRI_NO = 0,
 	TRI_YES = 1,
 	TRI_MODULE = 2,
 };
 
-struct bpf_linker_opts {
-	/* size of this struct, for forward/backward compatiblity */
-	size_t sz;
-};
-#define bpf_linker_opts__last_field sz
-
-struct bpf_linker_file_opts {
-	/* size of this struct, for forward/backward compatiblity */
-	size_t sz;
-};
-#define bpf_linker_file_opts__last_field sz
-
-struct bpf_linker;
-
-LIBBPF_API struct bpf_linker *bpf_linker__new(const char *filename, struct bpf_linker_opts *opts);
-LIBBPF_API int bpf_linker__add_file(struct bpf_linker *linker,
-				    const char *filename,
-				    const struct bpf_linker_file_opts *opts);
-LIBBPF_API int bpf_linker__finalize(struct bpf_linker *linker);
-LIBBPF_API void bpf_linker__free(struct bpf_linker *linker);
-
 #ifdef __cplusplus
 } /* extern "C" */
 #endif

src/libbpf.map

@@ -270,129 +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__is_sk_lookup;
-		bpf_program__set_autoload;
-		bpf_program__set_sk_lookup;
-		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;
-		xsk_socket__create_shared;
-} 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;
-		xsk_setup_xdp_prog;
-		xsk_socket__update_xskmap;
-} 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_object__next_map;
-		bpf_object__next_program;
-		bpf_object__prev_map;
-		bpf_object__prev_program;
-		btf__add_btf;
-		btf__add_tag;
-} LIBBPF_0.5.0;

src/libbpf_common.h

@@ -10,37 +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(0, 6)
-#define __LIBBPF_MARK_DEPRECATED_0_6(X) X
-#else
-#define __LIBBPF_MARK_DEPRECATED_0_6(X)
-#endif
-#if __LIBBPF_CURRENT_VERSION_GEQ(0, 7)
-#define __LIBBPF_MARK_DEPRECATED_0_7(X) X
-#else
-#define __LIBBPF_MARK_DEPRECATED_0_7(X)
-#endif
-
 /* Helper macro to declare and initialize libbpf options struct
  *
  * This dance with uninitialized declaration, followed by memset to zero,

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

@@ -9,52 +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 "libbpf_legacy.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 GELF_ST_VISIBILITY
-#define GELF_ST_VISIBILITY(o) ((o) & 0x03)
-#endif
 
 #define BTF_INFO_ENC(kind, kind_flag, vlen) \
 	((!!(kind_flag) << 31) | ((kind) << 24) | ((vlen) & BTF_MAX_VLEN))
@@ -67,17 +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_TAG_ENC(value, type, component_idx) \
-	BTF_TYPE_ENC(value, BTF_INFO_ENC(BTF_KIND_TAG, 0, 0), type), (component_idx)
 
-#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
@@ -89,40 +34,20 @@
 	(offsetof(TYPE, FIELD) + sizeof(((TYPE *)0)->FIELD))
 #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)
-
 /* 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,
@@ -138,97 +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
-/*
- * 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);
-}
-
-struct btf;
-struct btf_type;
-
-struct btf_type *btf_type_by_id(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_ALL		= 0x3ff, /* 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;
-};
-
-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)
@@ -237,9 +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;
 }
@@ -253,63 +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);		      \
-})
-
 
 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);
 
-struct bpf_prog_load_params {
-	enum bpf_prog_type prog_type;
-	enum bpf_attach_type expected_attach_type;
-	const char *name;
-	const struct bpf_insn *insns;
-	size_t insn_cnt;
-	const char *license;
-	__u32 kern_version;
-	__u32 attach_prog_fd;
-	__u32 attach_btf_obj_fd;
-	__u32 attach_btf_id;
-	__u32 prog_ifindex;
-	__u32 prog_btf_fd;
-	__u32 prog_flags;
-
-	__u32 func_info_rec_size;
-	const void *func_info;
-	__u32 func_info_cnt;
-
-	__u32 line_info_rec_size;
-	const void *line_info;
-	__u32 line_info_cnt;
-
-	__u32 log_level;
-	char *log_buf;
-	size_t log_buf_sz;
-	int *fd_array;
-};
-
-int libbpf__bpf_prog_load(const struct bpf_prog_load_params *load_attr);
-
 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 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);
+
+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 {
 	/*
@@ -332,44 +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;
@@ -377,7 +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;
 };
 
@@ -402,74 +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);
-
-extern enum libbpf_strict_mode libbpf_mode;
-
-/* 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)
-{
-	if (libbpf_mode & LIBBPF_STRICT_DIRECT_ERRS)
-		/* 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,
+};
 
-	/* legacy: on error return -1 directly and don't touch errno */
-	return ret;
-}
-
-/* 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;
-
-	if (libbpf_mode & LIBBPF_STRICT_CLEAN_PTRS)
-		return NULL;
-
-	/* legacy: encode err as ptr */
-	return ERR_PTR(err);
-}
-
-/* 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);
-
-	if (libbpf_mode & LIBBPF_STRICT_CLEAN_PTRS)
-		return IS_ERR(ret) ? NULL : ret;
-
-	/* legacy: pass-through original pointer */
-	return 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);
-}
+/* 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
+ */
+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

@@ -1,68 +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
-
-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").
-	 */
-	LIBBPF_STRICT_SEC_NAME = 0x04,
-
-	__LIBBPF_STRICT_LAST,
-};
-
-LIBBPF_API int libbpf_set_strict_mode(enum libbpf_strict_mode mode);
-
-
-#ifdef __cplusplus
-} /* extern "C" */
-#endif
-
-#endif /* __LIBBPF_LEGACY_BPF_H */

src/libbpf_probes.c

@@ -17,6 +17,9 @@
 #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
+
 static bool grep(const char *buffer, const char *pattern)
 {
 	return !!strstr(buffer, pattern);
@@ -75,12 +78,6 @@ probe_load(enum bpf_prog_type prog_type, const struct bpf_insn *insns,
 	case BPF_PROG_TYPE_CGROUP_SOCK_ADDR:
 		xattr.expected_attach_type = BPF_CGROUP_INET4_CONNECT;
 		break;
-	case BPF_PROG_TYPE_CGROUP_SOCKOPT:
-		xattr.expected_attach_type = BPF_CGROUP_GETSOCKOPT;
-		break;
-	case BPF_PROG_TYPE_SK_LOOKUP:
-		xattr.expected_attach_type = BPF_SK_LOOKUP;
-		break;
 	case BPF_PROG_TYPE_KPROBE:
 		xattr.kern_version = get_kernel_version();
 		break;
@@ -107,6 +104,7 @@ probe_load(enum bpf_prog_type prog_type, const struct bpf_insn *insns,
 	case BPF_PROG_TYPE_SK_REUSEPORT:
 	case BPF_PROG_TYPE_FLOW_DISSECTOR:
 	case BPF_PROG_TYPE_CGROUP_SYSCTL:
+	case BPF_PROG_TYPE_CGROUP_SOCKOPT:
 	case BPF_PROG_TYPE_TRACING:
 	case BPF_PROG_TYPE_STRUCT_OPS:
 	case BPF_PROG_TYPE_EXT:
@@ -172,7 +170,7 @@ int libbpf__load_raw_btf(const char *raw_types, size_t types_len,
 	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 {
@@ -231,14 +229,12 @@ bool bpf_probe_map_type(enum bpf_map_type map_type, __u32 ifindex)
 		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;
 		map_flags = BPF_F_NO_PREALLOC;
-		btf_fd = load_local_storage_btf();
+		btf_fd = load_sk_storage_btf();
 		if (btf_fd < 0)
 			return false;
 		break;

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 0
-#define LIBBPF_MINOR_VERSION 6
-
-#endif /* __LIBBPF_VERSION_H */

src/netlink.c

@@ -4,10 +4,7 @@
 #include <stdlib.h>
 #include <memory.h>
 #include <unistd.h>
-#include <arpa/inet.h>
 #include <linux/bpf.h>
-#include <linux/if_ether.h>
-#include <linux/pkt_cls.h>
 #include <linux/rtnetlink.h>
 #include <sys/socket.h>
 #include <errno.h>
@@ -18,12 +15,13 @@
 #include "libbpf_internal.h"
 #include "nlattr.h"
 
+/* make sure libbpf doesn't use kernel-only integer typedefs */
+#pragma GCC poison u8 u16 u32 u64 s8 s16 s32 s64
+
 #ifndef SOL_NETLINK
 #define SOL_NETLINK 270
 #endif
 
-typedef int (*libbpf_dump_nlmsg_t)(void *cookie, void *msg, struct nlattr **tb);
-
 typedef int (*__dump_nlmsg_t)(struct nlmsghdr *nlmsg, libbpf_dump_nlmsg_t,
 			      void *cookie);
 
@@ -33,7 +31,7 @@ struct xdp_id_md {
 	struct xdp_link_info info;
 };
 
-static int libbpf_netlink_open(__u32 *nl_pid)
+int libbpf_netlink_open(__u32 *nl_pid)
 {
 	struct sockaddr_nl sa;
 	socklen_t addrlen;
@@ -43,7 +41,7 @@ static int libbpf_netlink_open(__u32 *nl_pid)
 	memset(&sa, 0, sizeof(sa));
 	sa.nl_family = AF_NETLINK;
 
-	sock = socket(AF_NETLINK, SOCK_RAW | SOCK_CLOEXEC, NETLINK_ROUTE);
+	sock = socket(AF_NETLINK, SOCK_RAW, NETLINK_ROUTE);
 	if (sock < 0)
 		return -errno;
 
@@ -76,20 +74,9 @@ cleanup:
 	return ret;
 }
 
-static void libbpf_netlink_close(int sock)
-{
-	close(sock);
-}
-
-enum {
-	NL_CONT,
-	NL_NEXT,
-	NL_DONE,
-};
-
-static int libbpf_netlink_recv(int sock, __u32 nl_pid, int seq,
-			       __dump_nlmsg_t _fn, libbpf_dump_nlmsg_t fn,
-			       void *cookie)
+static int bpf_netlink_recv(int sock, __u32 nl_pid, int seq,
+			    __dump_nlmsg_t _fn, libbpf_dump_nlmsg_t fn,
+			    void *cookie)
 {
 	bool multipart = true;
 	struct nlmsgerr *err;
@@ -98,7 +85,6 @@ static int libbpf_netlink_recv(int sock, __u32 nl_pid, int seq,
 	int len, ret;
 
 	while (multipart) {
-start:
 		multipart = false;
 		len = recv(sock, buf, sizeof(buf), 0);
 		if (len < 0) {
@@ -136,16 +122,8 @@ start:
 			}
 			if (_fn) {
 				ret = _fn(nh, fn, cookie);
-				switch (ret) {
-				case NL_CONT:
-					break;
-				case NL_NEXT:
-					goto start;
-				case NL_DONE:
-					return 0;
-				default:
+				if (ret)
 					return ret;
-				}
 			}
 		}
 	}
@@ -154,92 +132,95 @@ done:
 	return ret;
 }
 
-static int libbpf_netlink_send_recv(struct libbpf_nla_req *req,
-				    __dump_nlmsg_t parse_msg,
-				    libbpf_dump_nlmsg_t parse_attr,
-				    void *cookie)
+static int __bpf_set_link_xdp_fd_replace(int ifindex, int fd, int old_fd,
+					 __u32 flags)
 {
+	int sock, seq = 0, ret;
+	struct nlattr *nla, *nla_xdp;
+	struct {
+		struct nlmsghdr  nh;
+		struct ifinfomsg ifinfo;
+		char             attrbuf[64];
+	} req;
 	__u32 nl_pid = 0;
-	int sock, ret;
 
 	sock = libbpf_netlink_open(&nl_pid);
 	if (sock < 0)
 		return sock;
 
-	req->nh.nlmsg_pid = 0;
-	req->nh.nlmsg_seq = time(NULL);
-
-	if (send(sock, req, req->nh.nlmsg_len, 0) < 0) {
-		ret = -errno;
-		goto out;
-	}
-
-	ret = libbpf_netlink_recv(sock, nl_pid, req->nh.nlmsg_seq,
-				  parse_msg, parse_attr, cookie);
-out:
-	libbpf_netlink_close(sock);
-	return ret;
-}
-
-static int __bpf_set_link_xdp_fd_replace(int ifindex, int fd, int old_fd,
-					 __u32 flags)
-{
-	struct nlattr *nla;
-	int ret;
-	struct libbpf_nla_req req;
-
 	memset(&req, 0, sizeof(req));
-	req.nh.nlmsg_len      = NLMSG_LENGTH(sizeof(struct ifinfomsg));
-	req.nh.nlmsg_flags    = NLM_F_REQUEST | NLM_F_ACK;
-	req.nh.nlmsg_type     = RTM_SETLINK;
+	req.nh.nlmsg_len = NLMSG_LENGTH(sizeof(struct ifinfomsg));
+	req.nh.nlmsg_flags = NLM_F_REQUEST | NLM_F_ACK;
+	req.nh.nlmsg_type = RTM_SETLINK;
+	req.nh.nlmsg_pid = 0;
+	req.nh.nlmsg_seq = ++seq;
 	req.ifinfo.ifi_family = AF_UNSPEC;
-	req.ifinfo.ifi_index  = ifindex;
+	req.ifinfo.ifi_index = ifindex;
 
-	nla = nlattr_begin_nested(&req, IFLA_XDP);
-	if (!nla)
-		return -EMSGSIZE;
-	ret = nlattr_add(&req, IFLA_XDP_FD, &fd, sizeof(fd));
-	if (ret < 0)
-		return ret;
+	/* started nested attribute for XDP */
+	nla = (struct nlattr *)(((char *)&req)
+				+ NLMSG_ALIGN(req.nh.nlmsg_len));
+	nla->nla_type = NLA_F_NESTED | IFLA_XDP;
+	nla->nla_len = NLA_HDRLEN;
+
+	/* add XDP fd */
+	nla_xdp = (struct nlattr *)((char *)nla + nla->nla_len);
+	nla_xdp->nla_type = IFLA_XDP_FD;
+	nla_xdp->nla_len = NLA_HDRLEN + sizeof(int);
+	memcpy((char *)nla_xdp + NLA_HDRLEN, &fd, sizeof(fd));
+	nla->nla_len += nla_xdp->nla_len;
+
+	/* if user passed in any flags, add those too */
 	if (flags) {
-		ret = nlattr_add(&req, IFLA_XDP_FLAGS, &flags, sizeof(flags));
-		if (ret < 0)
-			return ret;
+		nla_xdp = (struct nlattr *)((char *)nla + nla->nla_len);
+		nla_xdp->nla_type = IFLA_XDP_FLAGS;
+		nla_xdp->nla_len = NLA_HDRLEN + sizeof(flags);
+		memcpy((char *)nla_xdp + NLA_HDRLEN, &flags, sizeof(flags));
+		nla->nla_len += nla_xdp->nla_len;
 	}
-	if (flags & XDP_FLAGS_REPLACE) {
-		ret = nlattr_add(&req, IFLA_XDP_EXPECTED_FD, &old_fd,
-				 sizeof(old_fd));
-		if (ret < 0)
-			return ret;
-	}
-	nlattr_end_nested(&req, nla);
 
-	return libbpf_netlink_send_recv(&req, NULL, NULL, NULL);
+	if (flags & XDP_FLAGS_REPLACE) {
+		nla_xdp = (struct nlattr *)((char *)nla + nla->nla_len);
+		nla_xdp->nla_type = IFLA_XDP_EXPECTED_FD;
+		nla_xdp->nla_len = NLA_HDRLEN + sizeof(old_fd);
+		memcpy((char *)nla_xdp + NLA_HDRLEN, &old_fd, sizeof(old_fd));
+		nla->nla_len += nla_xdp->nla_len;
+	}
+
+	req.nh.nlmsg_len += NLA_ALIGN(nla->nla_len);
+
+	if (send(sock, &req, req.nh.nlmsg_len, 0) < 0) {
+		ret = -errno;
+		goto cleanup;
+	}
+	ret = bpf_netlink_recv(sock, nl_pid, seq, NULL, NULL, NULL);
+
+cleanup:
+	close(sock);
+	return ret;
 }
 
 int bpf_set_link_xdp_fd_opts(int ifindex, int fd, __u32 flags,
 			     const struct bpf_xdp_set_link_opts *opts)
 {
-	int old_fd = -1, ret;
+	int old_fd = -1;
 
 	if (!OPTS_VALID(opts, bpf_xdp_set_link_opts))
-		return libbpf_err(-EINVAL);
+		return -EINVAL;
 
 	if (OPTS_HAS(opts, old_fd)) {
 		old_fd = OPTS_GET(opts, old_fd, -1);
 		flags |= XDP_FLAGS_REPLACE;
 	}
 
-	ret = __bpf_set_link_xdp_fd_replace(ifindex, fd, old_fd, flags);
-	return libbpf_err(ret);
+	return __bpf_set_link_xdp_fd_replace(ifindex, fd,
+					     old_fd,
+					     flags);
 }
 
 int bpf_set_link_xdp_fd(int ifindex, int fd, __u32 flags)
 {
-	int ret;
-
-	ret = __bpf_set_link_xdp_fd_replace(ifindex, fd, 0, flags);
-	return libbpf_err(ret);
+	return __bpf_set_link_xdp_fd_replace(ifindex, fd, 0, flags);
 }
 
 static int __dump_link_nlmsg(struct nlmsghdr *nlh,
@@ -251,7 +232,6 @@ static int __dump_link_nlmsg(struct nlmsghdr *nlh,
 
 	len = nlh->nlmsg_len - NLMSG_LENGTH(sizeof(*ifi));
 	attr = (struct nlattr *) ((void *) ifi + NLMSG_ALIGN(sizeof(*ifi)));
-
 	if (libbpf_nla_parse(tb, IFLA_MAX, attr, len, NULL) != 0)
 		return -LIBBPF_ERRNO__NLPARSE;
 
@@ -307,29 +287,27 @@ int bpf_get_link_xdp_info(int ifindex, struct xdp_link_info *info,
 			  size_t info_size, __u32 flags)
 {
 	struct xdp_id_md xdp_id = {};
+	int sock, ret;
+	__u32 nl_pid = 0;
 	__u32 mask;
-	int ret;
-	struct libbpf_nla_req req = {
-		.nh.nlmsg_len      = NLMSG_LENGTH(sizeof(struct ifinfomsg)),
-		.nh.nlmsg_type     = RTM_GETLINK,
-		.nh.nlmsg_flags    = NLM_F_DUMP | NLM_F_REQUEST,
-		.ifinfo.ifi_family = AF_PACKET,
-	};
 
 	if (flags & ~XDP_FLAGS_MASK || !info_size)
-		return libbpf_err(-EINVAL);
+		return -EINVAL;
 
 	/* Check whether the single {HW,DRV,SKB} mode is set */
 	flags &= (XDP_FLAGS_SKB_MODE | XDP_FLAGS_DRV_MODE | XDP_FLAGS_HW_MODE);
 	mask = flags - 1;
 	if (flags && flags & mask)
-		return libbpf_err(-EINVAL);
+		return -EINVAL;
+
+	sock = libbpf_netlink_open(&nl_pid);
+	if (sock < 0)
+		return sock;
 
 	xdp_id.ifindex = ifindex;
 	xdp_id.flags = flags;
 
-	ret = libbpf_netlink_send_recv(&req, __dump_link_nlmsg,
-				       get_xdp_info, &xdp_id);
+	ret = libbpf_nl_get_link(sock, nl_pid, get_xdp_info, &xdp_id);
 	if (!ret) {
 		size_t sz = min(info_size, sizeof(xdp_id.info));
 
@@ -337,7 +315,8 @@ int bpf_get_link_xdp_info(int ifindex, struct xdp_link_info *info,
 		memset((void *) info + sz, 0, info_size - sz);
 	}
 
-	return libbpf_err(ret);
+	close(sock);
+	return ret;
 }
 
 static __u32 get_xdp_id(struct xdp_link_info *info, __u32 flags)
@@ -365,394 +344,145 @@ int bpf_get_link_xdp_id(int ifindex, __u32 *prog_id, __u32 flags)
 	if (!ret)
 		*prog_id = get_xdp_id(&info, flags);
 
-	return libbpf_err(ret);
+	return ret;
 }
 
-typedef int (*qdisc_config_t)(struct libbpf_nla_req *req);
-
-static int clsact_config(struct libbpf_nla_req *req)
+int libbpf_nl_get_link(int sock, unsigned int nl_pid,
+		       libbpf_dump_nlmsg_t dump_link_nlmsg, void *cookie)
 {
-	req->tc.tcm_parent = TC_H_CLSACT;
-	req->tc.tcm_handle = TC_H_MAKE(TC_H_CLSACT, 0);
+	struct {
+		struct nlmsghdr nlh;
+		struct ifinfomsg ifm;
+	} req = {
+		.nlh.nlmsg_len = NLMSG_LENGTH(sizeof(struct ifinfomsg)),
+		.nlh.nlmsg_type = RTM_GETLINK,
+		.nlh.nlmsg_flags = NLM_F_DUMP | NLM_F_REQUEST,
+		.ifm.ifi_family = AF_PACKET,
+	};
+	int seq = time(NULL);
 
-	return nlattr_add(req, TCA_KIND, "clsact", sizeof("clsact"));
-}
-
-static int attach_point_to_config(struct bpf_tc_hook *hook,
-				  qdisc_config_t *config)
-{
-	switch (OPTS_GET(hook, attach_point, 0)) {
-	case BPF_TC_INGRESS:
-	case BPF_TC_EGRESS:
-	case BPF_TC_INGRESS | BPF_TC_EGRESS:
-		if (OPTS_GET(hook, parent, 0))
-			return -EINVAL;
-		*config = &clsact_config;
-		return 0;
-	case BPF_TC_CUSTOM:
-		return -EOPNOTSUPP;
-	default:
-		return -EINVAL;
-	}
-}
-
-static int tc_get_tcm_parent(enum bpf_tc_attach_point attach_point,
-			     __u32 *parent)
-{
-	switch (attach_point) {
-	case BPF_TC_INGRESS:
-	case BPF_TC_EGRESS:
-		if (*parent)
-			return -EINVAL;
-		*parent = TC_H_MAKE(TC_H_CLSACT,
-				    attach_point == BPF_TC_INGRESS ?
-				    TC_H_MIN_INGRESS : TC_H_MIN_EGRESS);
-		break;
-	case BPF_TC_CUSTOM:
-		if (!*parent)
-			return -EINVAL;
-		break;
-	default:
-		return -EINVAL;
-	}
-	return 0;
-}
-
-static int tc_qdisc_modify(struct bpf_tc_hook *hook, int cmd, int flags)
-{
-	qdisc_config_t config;
-	int ret;
-	struct libbpf_nla_req req;
-
-	ret = attach_point_to_config(hook, &config);
-	if (ret < 0)
-		return ret;
-
-	memset(&req, 0, sizeof(req));
-	req.nh.nlmsg_len   = NLMSG_LENGTH(sizeof(struct tcmsg));
-	req.nh.nlmsg_flags = NLM_F_REQUEST | NLM_F_ACK | flags;
-	req.nh.nlmsg_type  = cmd;
-	req.tc.tcm_family  = AF_UNSPEC;
-	req.tc.tcm_ifindex = OPTS_GET(hook, ifindex, 0);
-
-	ret = config(&req);
-	if (ret < 0)
-		return ret;
-
-	return libbpf_netlink_send_recv(&req, NULL, NULL, NULL);
-}
-
-static int tc_qdisc_create_excl(struct bpf_tc_hook *hook)
-{
-	return tc_qdisc_modify(hook, RTM_NEWQDISC, NLM_F_CREATE | NLM_F_EXCL);
-}
-
-static int tc_qdisc_delete(struct bpf_tc_hook *hook)
-{
-	return tc_qdisc_modify(hook, RTM_DELQDISC, 0);
-}
-
-int bpf_tc_hook_create(struct bpf_tc_hook *hook)
-{
-	int ret;
-
-	if (!hook || !OPTS_VALID(hook, bpf_tc_hook) ||
-	    OPTS_GET(hook, ifindex, 0) <= 0)
-		return libbpf_err(-EINVAL);
-
-	ret = tc_qdisc_create_excl(hook);
-	return libbpf_err(ret);
-}
-
-static int __bpf_tc_detach(const struct bpf_tc_hook *hook,
-			   const struct bpf_tc_opts *opts,
-			   const bool flush);
-
-int bpf_tc_hook_destroy(struct bpf_tc_hook *hook)
-{
-	if (!hook || !OPTS_VALID(hook, bpf_tc_hook) ||
-	    OPTS_GET(hook, ifindex, 0) <= 0)
-		return libbpf_err(-EINVAL);
-
-	switch (OPTS_GET(hook, attach_point, 0)) {
-	case BPF_TC_INGRESS:
-	case BPF_TC_EGRESS:
-		return libbpf_err(__bpf_tc_detach(hook, NULL, true));
-	case BPF_TC_INGRESS | BPF_TC_EGRESS:
-		return libbpf_err(tc_qdisc_delete(hook));
-	case BPF_TC_CUSTOM:
-		return libbpf_err(-EOPNOTSUPP);
-	default:
-		return libbpf_err(-EINVAL);
-	}
-}
-
-struct bpf_cb_ctx {
-	struct bpf_tc_opts *opts;
-	bool processed;
-};
-
-static int __get_tc_info(void *cookie, struct tcmsg *tc, struct nlattr **tb,
-			 bool unicast)
-{
-	struct nlattr *tbb[TCA_BPF_MAX + 1];
-	struct bpf_cb_ctx *info = cookie;
-
-	if (!info || !info->opts)
-		return -EINVAL;
-	if (unicast && info->processed)
-		return -EINVAL;
-	if (!tb[TCA_OPTIONS])
-		return NL_CONT;
-
-	libbpf_nla_parse_nested(tbb, TCA_BPF_MAX, tb[TCA_OPTIONS], NULL);
-	if (!tbb[TCA_BPF_ID])
-		return -EINVAL;
-
-	OPTS_SET(info->opts, prog_id, libbpf_nla_getattr_u32(tbb[TCA_BPF_ID]));
-	OPTS_SET(info->opts, handle, tc->tcm_handle);
-	OPTS_SET(info->opts, priority, TC_H_MAJ(tc->tcm_info) >> 16);
-
-	info->processed = true;
-	return unicast ? NL_NEXT : NL_DONE;
-}
-
-static int get_tc_info(struct nlmsghdr *nh, libbpf_dump_nlmsg_t fn,
-		       void *cookie)
-{
-	struct tcmsg *tc = NLMSG_DATA(nh);
-	struct nlattr *tb[TCA_MAX + 1];
-
-	libbpf_nla_parse(tb, TCA_MAX,
-			 (struct nlattr *)((void *)tc + NLMSG_ALIGN(sizeof(*tc))),
-			 NLMSG_PAYLOAD(nh, sizeof(*tc)), NULL);
-	if (!tb[TCA_KIND])
-		return NL_CONT;
-	return __get_tc_info(cookie, tc, tb, nh->nlmsg_flags & NLM_F_ECHO);
-}
-
-static int tc_add_fd_and_name(struct libbpf_nla_req *req, int fd)
-{
-	struct bpf_prog_info info = {};
-	__u32 info_len = sizeof(info);
-	char name[256];
-	int len, ret;
-
-	ret = bpf_obj_get_info_by_fd(fd, &info, &info_len);
-	if (ret < 0)
-		return ret;
-
-	ret = nlattr_add(req, TCA_BPF_FD, &fd, sizeof(fd));
-	if (ret < 0)
-		return ret;
-	len = snprintf(name, sizeof(name), "%s:[%u]", info.name, info.id);
-	if (len < 0)
+	req.nlh.nlmsg_seq = seq;
+	if (send(sock, &req, req.nlh.nlmsg_len, 0) < 0)
 		return -errno;
-	if (len >= sizeof(name))
-		return -ENAMETOOLONG;
-	return nlattr_add(req, TCA_BPF_NAME, name, len + 1);
+
+	return bpf_netlink_recv(sock, nl_pid, seq, __dump_link_nlmsg,
+				dump_link_nlmsg, cookie);
 }
 
-int bpf_tc_attach(const struct bpf_tc_hook *hook, struct bpf_tc_opts *opts)
+static int __dump_class_nlmsg(struct nlmsghdr *nlh,
+			      libbpf_dump_nlmsg_t dump_class_nlmsg,
+			      void *cookie)
 {
-	__u32 protocol, bpf_flags, handle, priority, parent, prog_id, flags;
-	int ret, ifindex, attach_point, prog_fd;
-	struct bpf_cb_ctx info = {};
-	struct libbpf_nla_req req;
-	struct nlattr *nla;
+	struct nlattr *tb[TCA_MAX + 1], *attr;
+	struct tcmsg *t = NLMSG_DATA(nlh);
+	int len;
 
-	if (!hook || !opts ||
-	    !OPTS_VALID(hook, bpf_tc_hook) ||
-	    !OPTS_VALID(opts, bpf_tc_opts))
-		return libbpf_err(-EINVAL);
+	len = nlh->nlmsg_len - NLMSG_LENGTH(sizeof(*t));
+	attr = (struct nlattr *) ((void *) t + NLMSG_ALIGN(sizeof(*t)));
+	if (libbpf_nla_parse(tb, TCA_MAX, attr, len, NULL) != 0)
+		return -LIBBPF_ERRNO__NLPARSE;
 
-	ifindex      = OPTS_GET(hook, ifindex, 0);
-	parent       = OPTS_GET(hook, parent, 0);
-	attach_point = OPTS_GET(hook, attach_point, 0);
-
-	handle       = OPTS_GET(opts, handle, 0);
-	priority     = OPTS_GET(opts, priority, 0);
-	prog_fd      = OPTS_GET(opts, prog_fd, 0);
-	prog_id      = OPTS_GET(opts, prog_id, 0);
-	flags        = OPTS_GET(opts, flags, 0);
-
-	if (ifindex <= 0 || !prog_fd || prog_id)
-		return libbpf_err(-EINVAL);
-	if (priority > UINT16_MAX)
-		return libbpf_err(-EINVAL);
-	if (flags & ~BPF_TC_F_REPLACE)
-		return libbpf_err(-EINVAL);
-
-	flags = (flags & BPF_TC_F_REPLACE) ? NLM_F_REPLACE : NLM_F_EXCL;
-	protocol = ETH_P_ALL;
-
-	memset(&req, 0, sizeof(req));
-	req.nh.nlmsg_len   = NLMSG_LENGTH(sizeof(struct tcmsg));
-	req.nh.nlmsg_flags = NLM_F_REQUEST | NLM_F_ACK | NLM_F_CREATE |
-			     NLM_F_ECHO | flags;
-	req.nh.nlmsg_type  = RTM_NEWTFILTER;
-	req.tc.tcm_family  = AF_UNSPEC;
-	req.tc.tcm_ifindex = ifindex;
-	req.tc.tcm_handle  = handle;
-	req.tc.tcm_info    = TC_H_MAKE(priority << 16, htons(protocol));
-
-	ret = tc_get_tcm_parent(attach_point, &parent);
-	if (ret < 0)
-		return libbpf_err(ret);
-	req.tc.tcm_parent = parent;
-
-	ret = nlattr_add(&req, TCA_KIND, "bpf", sizeof("bpf"));
-	if (ret < 0)
-		return libbpf_err(ret);
-	nla = nlattr_begin_nested(&req, TCA_OPTIONS);
-	if (!nla)
-		return libbpf_err(-EMSGSIZE);
-	ret = tc_add_fd_and_name(&req, prog_fd);
-	if (ret < 0)
-		return libbpf_err(ret);
-	bpf_flags = TCA_BPF_FLAG_ACT_DIRECT;
-	ret = nlattr_add(&req, TCA_BPF_FLAGS, &bpf_flags, sizeof(bpf_flags));
-	if (ret < 0)
-		return libbpf_err(ret);
-	nlattr_end_nested(&req, nla);
-
-	info.opts = opts;
-
-	ret = libbpf_netlink_send_recv(&req, get_tc_info, NULL, &info);
-	if (ret < 0)
-		return libbpf_err(ret);
-	if (!info.processed)
-		return libbpf_err(-ENOENT);
-	return ret;
+	return dump_class_nlmsg(cookie, t, tb);
 }
 
-static int __bpf_tc_detach(const struct bpf_tc_hook *hook,
-			   const struct bpf_tc_opts *opts,
-			   const bool flush)
+int libbpf_nl_get_class(int sock, unsigned int nl_pid, int ifindex,
+			libbpf_dump_nlmsg_t dump_class_nlmsg, void *cookie)
 {
-	__u32 protocol = 0, handle, priority, parent, prog_id, flags;
-	int ret, ifindex, attach_point, prog_fd;
-	struct libbpf_nla_req req;
+	struct {
+		struct nlmsghdr nlh;
+		struct tcmsg t;
+	} req = {
+		.nlh.nlmsg_len = NLMSG_LENGTH(sizeof(struct tcmsg)),
+		.nlh.nlmsg_type = RTM_GETTCLASS,
+		.nlh.nlmsg_flags = NLM_F_DUMP | NLM_F_REQUEST,
+		.t.tcm_family = AF_UNSPEC,
+		.t.tcm_ifindex = ifindex,
+	};
+	int seq = time(NULL);
 
-	if (!hook ||
-	    !OPTS_VALID(hook, bpf_tc_hook) ||
-	    !OPTS_VALID(opts, bpf_tc_opts))
-		return -EINVAL;
+	req.nlh.nlmsg_seq = seq;
+	if (send(sock, &req, req.nlh.nlmsg_len, 0) < 0)
+		return -errno;
 
-	ifindex      = OPTS_GET(hook, ifindex, 0);
-	parent       = OPTS_GET(hook, parent, 0);
-	attach_point = OPTS_GET(hook, attach_point, 0);
-
-	handle       = OPTS_GET(opts, handle, 0);
-	priority     = OPTS_GET(opts, priority, 0);
-	prog_fd      = OPTS_GET(opts, prog_fd, 0);
-	prog_id      = OPTS_GET(opts, prog_id, 0);
-	flags        = OPTS_GET(opts, flags, 0);
-
-	if (ifindex <= 0 || flags || prog_fd || prog_id)
-		return -EINVAL;
-	if (priority > UINT16_MAX)
-		return -EINVAL;
-	if (!flush) {
-		if (!handle || !priority)
-			return -EINVAL;
-		protocol = ETH_P_ALL;
-	} else {
-		if (handle || priority)
-			return -EINVAL;
-	}
-
-	memset(&req, 0, sizeof(req));
-	req.nh.nlmsg_len   = NLMSG_LENGTH(sizeof(struct tcmsg));
-	req.nh.nlmsg_flags = NLM_F_REQUEST | NLM_F_ACK;
-	req.nh.nlmsg_type  = RTM_DELTFILTER;
-	req.tc.tcm_family  = AF_UNSPEC;
-	req.tc.tcm_ifindex = ifindex;
-	if (!flush) {
-		req.tc.tcm_handle = handle;
-		req.tc.tcm_info   = TC_H_MAKE(priority << 16, htons(protocol));
-	}
-
-	ret = tc_get_tcm_parent(attach_point, &parent);
-	if (ret < 0)
-		return ret;
-	req.tc.tcm_parent = parent;
-
-	if (!flush) {
-		ret = nlattr_add(&req, TCA_KIND, "bpf", sizeof("bpf"));
-		if (ret < 0)
-			return ret;
-	}
-
-	return libbpf_netlink_send_recv(&req, NULL, NULL, NULL);
+	return bpf_netlink_recv(sock, nl_pid, seq, __dump_class_nlmsg,
+				dump_class_nlmsg, cookie);
 }
 
-int bpf_tc_detach(const struct bpf_tc_hook *hook,
-		  const struct bpf_tc_opts *opts)
+static int __dump_qdisc_nlmsg(struct nlmsghdr *nlh,
+			      libbpf_dump_nlmsg_t dump_qdisc_nlmsg,
+			      void *cookie)
 {
-	int ret;
+	struct nlattr *tb[TCA_MAX + 1], *attr;
+	struct tcmsg *t = NLMSG_DATA(nlh);
+	int len;
 
-	if (!opts)
-		return libbpf_err(-EINVAL);
+	len = nlh->nlmsg_len - NLMSG_LENGTH(sizeof(*t));
+	attr = (struct nlattr *) ((void *) t + NLMSG_ALIGN(sizeof(*t)));
+	if (libbpf_nla_parse(tb, TCA_MAX, attr, len, NULL) != 0)
+		return -LIBBPF_ERRNO__NLPARSE;
 
-	ret = __bpf_tc_detach(hook, opts, false);
-	return libbpf_err(ret);
+	return dump_qdisc_nlmsg(cookie, t, tb);
 }
 
-int bpf_tc_query(const struct bpf_tc_hook *hook, struct bpf_tc_opts *opts)
+int libbpf_nl_get_qdisc(int sock, unsigned int nl_pid, int ifindex,
+			libbpf_dump_nlmsg_t dump_qdisc_nlmsg, void *cookie)
 {
-	__u32 protocol, handle, priority, parent, prog_id, flags;
-	int ret, ifindex, attach_point, prog_fd;
-	struct bpf_cb_ctx info = {};
-	struct libbpf_nla_req req;
+	struct {
+		struct nlmsghdr nlh;
+		struct tcmsg t;
+	} req = {
+		.nlh.nlmsg_len = NLMSG_LENGTH(sizeof(struct tcmsg)),
+		.nlh.nlmsg_type = RTM_GETQDISC,
+		.nlh.nlmsg_flags = NLM_F_DUMP | NLM_F_REQUEST,
+		.t.tcm_family = AF_UNSPEC,
+		.t.tcm_ifindex = ifindex,
+	};
+	int seq = time(NULL);
 
-	if (!hook || !opts ||
-	    !OPTS_VALID(hook, bpf_tc_hook) ||
-	    !OPTS_VALID(opts, bpf_tc_opts))
-		return libbpf_err(-EINVAL);
+	req.nlh.nlmsg_seq = seq;
+	if (send(sock, &req, req.nlh.nlmsg_len, 0) < 0)
+		return -errno;
 
-	ifindex      = OPTS_GET(hook, ifindex, 0);
-	parent       = OPTS_GET(hook, parent, 0);
-	attach_point = OPTS_GET(hook, attach_point, 0);
-
-	handle       = OPTS_GET(opts, handle, 0);
-	priority     = OPTS_GET(opts, priority, 0);
-	prog_fd      = OPTS_GET(opts, prog_fd, 0);
-	prog_id      = OPTS_GET(opts, prog_id, 0);
-	flags        = OPTS_GET(opts, flags, 0);
-
-	if (ifindex <= 0 || flags || prog_fd || prog_id ||
-	    !handle || !priority)
-		return libbpf_err(-EINVAL);
-	if (priority > UINT16_MAX)
-		return libbpf_err(-EINVAL);
-
-	protocol = ETH_P_ALL;
-
-	memset(&req, 0, sizeof(req));
-	req.nh.nlmsg_len   = NLMSG_LENGTH(sizeof(struct tcmsg));
-	req.nh.nlmsg_flags = NLM_F_REQUEST;
-	req.nh.nlmsg_type  = RTM_GETTFILTER;
-	req.tc.tcm_family  = AF_UNSPEC;
-	req.tc.tcm_ifindex = ifindex;
-	req.tc.tcm_handle  = handle;
-	req.tc.tcm_info    = TC_H_MAKE(priority << 16, htons(protocol));
-
-	ret = tc_get_tcm_parent(attach_point, &parent);
-	if (ret < 0)
-		return libbpf_err(ret);
-	req.tc.tcm_parent = parent;
-
-	ret = nlattr_add(&req, TCA_KIND, "bpf", sizeof("bpf"));
-	if (ret < 0)
-		return libbpf_err(ret);
-
-	info.opts = opts;
-
-	ret = libbpf_netlink_send_recv(&req, get_tc_info, NULL, &info);
-	if (ret < 0)
-		return libbpf_err(ret);
-	if (!info.processed)
-		return libbpf_err(-ENOENT);
-	return ret;
+	return bpf_netlink_recv(sock, nl_pid, seq, __dump_qdisc_nlmsg,
+				dump_qdisc_nlmsg, cookie);
+}
+
+static int __dump_filter_nlmsg(struct nlmsghdr *nlh,
+			       libbpf_dump_nlmsg_t dump_filter_nlmsg,
+			       void *cookie)
+{
+	struct nlattr *tb[TCA_MAX + 1], *attr;
+	struct tcmsg *t = NLMSG_DATA(nlh);
+	int len;
+
+	len = nlh->nlmsg_len - NLMSG_LENGTH(sizeof(*t));
+	attr = (struct nlattr *) ((void *) t + NLMSG_ALIGN(sizeof(*t)));
+	if (libbpf_nla_parse(tb, TCA_MAX, attr, len, NULL) != 0)
+		return -LIBBPF_ERRNO__NLPARSE;
+
+	return dump_filter_nlmsg(cookie, t, tb);
+}
+
+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 {
+		struct nlmsghdr nlh;
+		struct tcmsg t;
+	} req = {
+		.nlh.nlmsg_len = NLMSG_LENGTH(sizeof(struct tcmsg)),
+		.nlh.nlmsg_type = RTM_GETTFILTER,
+		.nlh.nlmsg_flags = NLM_F_DUMP | NLM_F_REQUEST,
+		.t.tcm_family = AF_UNSPEC,
+		.t.tcm_ifindex = ifindex,
+		.t.tcm_parent = handle,
+	};
+	int seq = time(NULL);
+
+	req.nlh.nlmsg_seq = seq;
+	if (send(sock, &req, req.nlh.nlmsg_len, 0) < 0)
+		return -errno;
+
+	return bpf_netlink_recv(sock, nl_pid, seq, __dump_filter_nlmsg,
+				dump_filter_nlmsg, cookie);
 }

src/nlattr.c

@@ -7,11 +7,14 @@
  */
 
 #include <errno.h>
-#include <string.h>
-#include <stdio.h>
-#include <linux/rtnetlink.h>
 #include "nlattr.h"
 #include "libbpf_internal.h"
+#include <linux/rtnetlink.h>
+#include <string.h>
+#include <stdio.h>
+
+/* make sure libbpf doesn't use kernel-only integer typedefs */
+#pragma GCC poison u8 u16 u32 u64 s8 s16 s32 s64
 
 static uint16_t nla_attr_minlen[LIBBPF_NLA_TYPE_MAX+1] = {
 	[LIBBPF_NLA_U8]		= sizeof(uint8_t),
@@ -27,7 +30,7 @@ static struct nlattr *nla_next(const struct nlattr *nla, int *remaining)
 	int totlen = NLA_ALIGN(nla->nla_len);
 
 	*remaining -= totlen;
-	return (struct nlattr *)((void *)nla + totlen);
+	return (struct nlattr *) ((char *) nla + totlen);
 }
 
 static int nla_ok(const struct nlattr *nla, int remaining)

src/nlattr.h

@@ -10,11 +10,7 @@
 #define __LIBBPF_NLATTR_H
 
 #include <stdint.h>
-#include <string.h>
-#include <errno.h>
 #include <linux/netlink.h>
-#include <linux/rtnetlink.h>
-
 /* avoid multiple definition of netlink features */
 #define __LINUX_NETLINK_H
 
@@ -53,15 +49,6 @@ struct libbpf_nla_policy {
 	uint16_t	maxlen;
 };
 
-struct libbpf_nla_req {
-	struct nlmsghdr nh;
-	union {
-		struct ifinfomsg ifinfo;
-		struct tcmsg tc;
-	};
-	char buf[128];
-};
-
 /**
  * @ingroup attr
  * Iterate over a stream of attributes
@@ -81,7 +68,7 @@ struct libbpf_nla_req {
  */
 static inline void *libbpf_nla_data(const struct nlattr *nla)
 {
-	return (void *)nla + NLA_HDRLEN;
+	return (char *) nla + NLA_HDRLEN;
 }
 
 static inline uint8_t libbpf_nla_getattr_u8(const struct nlattr *nla)
@@ -116,49 +103,4 @@ int libbpf_nla_parse_nested(struct nlattr *tb[], int maxtype,
 
 int libbpf_nla_dump_errormsg(struct nlmsghdr *nlh);
 
-static inline struct nlattr *nla_data(struct nlattr *nla)
-{
-	return (struct nlattr *)((void *)nla + NLA_HDRLEN);
-}
-
-static inline struct nlattr *req_tail(struct libbpf_nla_req *req)
-{
-	return (struct nlattr *)((void *)req + NLMSG_ALIGN(req->nh.nlmsg_len));
-}
-
-static inline int nlattr_add(struct libbpf_nla_req *req, int type,
-			     const void *data, int len)
-{
-	struct nlattr *nla;
-
-	if (NLMSG_ALIGN(req->nh.nlmsg_len) + NLA_ALIGN(NLA_HDRLEN + len) > sizeof(*req))
-		return -EMSGSIZE;
-	if (!!data != !!len)
-		return -EINVAL;
-
-	nla = req_tail(req);
-	nla->nla_type = type;
-	nla->nla_len = NLA_HDRLEN + len;
-	if (data)
-		memcpy(nla_data(nla), data, len);
-	req->nh.nlmsg_len = NLMSG_ALIGN(req->nh.nlmsg_len) + NLA_ALIGN(nla->nla_len);
-	return 0;
-}
-
-static inline struct nlattr *nlattr_begin_nested(struct libbpf_nla_req *req, int type)
-{
-	struct nlattr *tail;
-
-	tail = req_tail(req);
-	if (nlattr_add(req, type | NLA_F_NESTED, NULL, 0))
-		return NULL;
-	return tail;
-}
-
-static inline void nlattr_end_nested(struct libbpf_nla_req *req,
-				     struct nlattr *tail)
-{
-	tail->nla_len = (void *)req_tail(req) - (void *)tail;
-}
-
 #endif /* __LIBBPF_NLATTR_H */

src/relo_core.h

@@ -1,100 +0,0 @@
-/* SPDX-License-Identifier: (LGPL-2.1 OR BSD-2-Clause) */
-/* Copyright (c) 2019 Facebook */
-
-#ifndef __RELO_CORE_H
-#define __RELO_CORE_H
-
-/* bpf_core_relo_kind encodes which aspect of captured field/type/enum value
- * has to be adjusted by relocations.
- */
-enum bpf_core_relo_kind {
-	BPF_FIELD_BYTE_OFFSET = 0,	/* field byte offset */
-	BPF_FIELD_BYTE_SIZE = 1,	/* field size in bytes */
-	BPF_FIELD_EXISTS = 2,		/* field existence in target kernel */
-	BPF_FIELD_SIGNED = 3,		/* field signedness (0 - unsigned, 1 - signed) */
-	BPF_FIELD_LSHIFT_U64 = 4,	/* bitfield-specific left bitshift */
-	BPF_FIELD_RSHIFT_U64 = 5,	/* bitfield-specific right bitshift */
-	BPF_TYPE_ID_LOCAL = 6,		/* type ID in local BPF object */
-	BPF_TYPE_ID_TARGET = 7,		/* type ID in target kernel */
-	BPF_TYPE_EXISTS = 8,		/* type existence in target kernel */
-	BPF_TYPE_SIZE = 9,		/* type size in bytes */
-	BPF_ENUMVAL_EXISTS = 10,	/* enum value existence in target kernel */
-	BPF_ENUMVAL_VALUE = 11,		/* enum value integer value */
-};
-
-/* The minimum bpf_core_relo checked by the loader
- *
- * CO-RE 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
- *   type or field;
- * - access_str_off - offset into corresponding .BTF string section. String
- *   interpretation depends on specific relocation kind:
- *     - for field-based relocations, string encodes an accessed field using
- *     a sequence of field and array indices, separated by colon (:). It's
- *     conceptually very close to LLVM's getelementptr ([0]) instruction's
- *     arguments for identifying offset to a field.
- *     - for type-based relocations, strings is expected to be just "0";
- *     - for enum value-based relocations, string contains an index of enum
- *     value within its enum type;
- *
- * 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
- */
-struct bpf_core_relo {
-	__u32   insn_off;
-	__u32   type_id;
-	__u32   access_str_off;
-	enum bpf_core_relo_kind kind;
-};
-
-struct bpf_core_cand {
-	const struct btf *btf;
-	const struct btf_type *t;
-	const char *name;
-	__u32 id;
-};
-
-/* dynamically sized list of type IDs and its associated struct btf */
-struct bpf_core_cand_list {
-	struct bpf_core_cand *cands;
-	int len;
-};
-
-int bpf_core_apply_relo_insn(const char *prog_name,
-			     struct bpf_insn *insn, int insn_idx,
-			     const struct bpf_core_relo *relo, int relo_idx,
-			     const struct btf *local_btf,
-			     struct bpf_core_cand_list *cands);
-int bpf_core_types_are_compat(const struct btf *local_btf, __u32 local_id,
-			      const struct btf *targ_btf, __u32 targ_id);
-
-size_t bpf_core_essential_name_len(const char *name);
-#endif

src/ringbuf.c

@@ -16,11 +16,15 @@
 #include <asm/barrier.h>
 #include <sys/mman.h>
 #include <sys/epoll.h>
+#include <tools/libc_compat.h>
 
 #include "libbpf.h"
 #include "libbpf_internal.h"
 #include "bpf.h"
 
+/* make sure libbpf doesn't use kernel-only integer typedefs */
+#pragma GCC poison u8 u16 u32 u64 s8 s16 s32 s64
+
 struct ring {
 	ring_buffer_sample_fn sample_cb;
 	void *ctx;
@@ -69,23 +73,23 @@ int ring_buffer__add(struct ring_buffer *rb, int map_fd,
 		err = -errno;
 		pr_warn("ringbuf: failed to get map info for fd=%d: %d\n",
 			map_fd, err);
-		return libbpf_err(err);
+		return err;
 	}
 
 	if (info.type != BPF_MAP_TYPE_RINGBUF) {
 		pr_warn("ringbuf: map fd=%d is not BPF_MAP_TYPE_RINGBUF\n",
 			map_fd);
-		return libbpf_err(-EINVAL);
+		return -EINVAL;
 	}
 
-	tmp = libbpf_reallocarray(rb->rings, rb->ring_cnt + 1, sizeof(*rb->rings));
+	tmp = reallocarray(rb->rings, rb->ring_cnt + 1, sizeof(*rb->rings));
 	if (!tmp)
-		return libbpf_err(-ENOMEM);
+		return -ENOMEM;
 	rb->rings = tmp;
 
-	tmp = libbpf_reallocarray(rb->events, rb->ring_cnt + 1, sizeof(*rb->events));
+	tmp = reallocarray(rb->events, rb->ring_cnt + 1, sizeof(*rb->events));
 	if (!tmp)
-		return libbpf_err(-ENOMEM);
+		return -ENOMEM;
 	rb->events = tmp;
 
 	r = &rb->rings[rb->ring_cnt];
@@ -103,7 +107,7 @@ int ring_buffer__add(struct ring_buffer *rb, int map_fd,
 		err = -errno;
 		pr_warn("ringbuf: failed to mmap consumer page for map fd=%d: %d\n",
 			map_fd, err);
-		return libbpf_err(err);
+		return err;
 	}
 	r->consumer_pos = tmp;
 
@@ -118,7 +122,7 @@ int ring_buffer__add(struct ring_buffer *rb, int map_fd,
 		ringbuf_unmap_ring(rb, r);
 		pr_warn("ringbuf: failed to mmap data pages for map fd=%d: %d\n",
 			map_fd, err);
-		return libbpf_err(err);
+		return err;
 	}
 	r->producer_pos = tmp;
 	r->data = tmp + rb->page_size;
@@ -133,7 +137,7 @@ int ring_buffer__add(struct ring_buffer *rb, int map_fd,
 		ringbuf_unmap_ring(rb, r);
 		pr_warn("ringbuf: failed to epoll add map fd=%d: %d\n",
 			map_fd, err);
-		return libbpf_err(err);
+		return err;
 	}
 
 	rb->ring_cnt++;
@@ -165,11 +169,11 @@ ring_buffer__new(int map_fd, ring_buffer_sample_fn sample_cb, void *ctx,
 	int err;
 
 	if (!OPTS_VALID(opts, ring_buffer_opts))
-		return errno = EINVAL, NULL;
+		return NULL;
 
 	rb = calloc(1, sizeof(*rb));
 	if (!rb)
-		return errno = ENOMEM, NULL;
+		return NULL;
 
 	rb->page_size = getpagesize();
 
@@ -188,7 +192,7 @@ ring_buffer__new(int map_fd, ring_buffer_sample_fn sample_cb, void *ctx,
 
 err_out:
 	ring_buffer__free(rb);
-	return errno = -err, NULL;
+	return NULL;
 }
 
 static inline int roundup_len(__u32 len)
@@ -202,11 +206,9 @@ static inline int roundup_len(__u32 len)
 	return (len + 7) / 8 * 8;
 }
 
-static int64_t ringbuf_process_ring(struct ring* r)
+static int ringbuf_process_ring(struct ring* r)
 {
-	int *len_ptr, len, err;
-	/* 64-bit to avoid overflow in case of extreme application behavior */
-	int64_t cnt = 0;
+	int *len_ptr, len, err, cnt = 0;
 	unsigned long cons_pos, prod_pos;
 	bool got_new_data;
 	void *sample;
@@ -229,7 +231,7 @@ static int64_t ringbuf_process_ring(struct ring* r)
 			if ((len & BPF_RINGBUF_DISCARD_BIT) == 0) {
 				sample = (void *)len_ptr + BPF_RINGBUF_HDR_SZ;
 				err = r->sample_cb(r->ctx, sample, len);
-				if (err < 0) {
+				if (err) {
 					/* update consumer pos and bail out */
 					smp_store_release(r->consumer_pos,
 							  cons_pos);
@@ -246,57 +248,41 @@ done:
 }
 
 /* Consume available ring buffer(s) data without event polling.
- * Returns number of records consumed across all registered ring buffers (or
- * INT_MAX, whichever is less), or negative number if any of the callbacks
- * return error.
+ * Returns number of records consumed across all registered ring buffers, or
+ * negative number if any of the callbacks return error.
  */
 int ring_buffer__consume(struct ring_buffer *rb)
 {
-	int64_t err, res = 0;
-	int i;
+	int i, err, res = 0;
 
 	for (i = 0; i < rb->ring_cnt; i++) {
 		struct ring *ring = &rb->rings[i];
 
 		err = ringbuf_process_ring(ring);
 		if (err < 0)
-			return libbpf_err(err);
+			return err;
 		res += err;
 	}
-	if (res > INT_MAX)
-		return INT_MAX;
 	return res;
 }
 
 /* Poll for available data and consume records, if any are available.
- * Returns number of records consumed (or INT_MAX, whichever is less), or
- * negative number, if any of the registered callbacks returned error.
+ * Returns number of records consumed, or negative number, if any of the
+ * registered callbacks returned error.
  */
 int ring_buffer__poll(struct ring_buffer *rb, int timeout_ms)
 {
-	int i, cnt;
-	int64_t err, res = 0;
+	int i, cnt, err, res = 0;
 
 	cnt = epoll_wait(rb->epoll_fd, rb->events, rb->ring_cnt, timeout_ms);
-	if (cnt < 0)
-		return libbpf_err(-errno);
-
 	for (i = 0; i < cnt; i++) {
 		__u32 ring_id = rb->events[i].data.fd;
 		struct ring *ring = &rb->rings[ring_id];
 
 		err = ringbuf_process_ring(ring);
 		if (err < 0)
-			return libbpf_err(err);
-		res += err;
+			return err;
+		res += cnt;
 	}
-	if (res > INT_MAX)
-		return INT_MAX;
-	return res;
-}
-
-/* Get an fd that can be used to sleep until data is available in the ring(s) */
-int ring_buffer__epoll_fd(const struct ring_buffer *rb)
-{
-	return rb->epoll_fd;
+	return cnt < 0 ? -errno : res;
 }

src/skel_internal.h

@@ -1,125 +0,0 @@
-/* SPDX-License-Identifier: (LGPL-2.1 OR BSD-2-Clause) */
-/* Copyright (c) 2021 Facebook */
-#ifndef __SKEL_INTERNAL_H
-#define __SKEL_INTERNAL_H
-
-#include <unistd.h>
-#include <sys/syscall.h>
-#include <sys/mman.h>
-
-/* This file is a base header for auto-generated *.lskel.h files.
- * Its contents will change and may become part of auto-generation in the future.
- *
- * The layout of bpf_[map|prog]_desc and bpf_loader_ctx is feature dependent
- * and will change from one version of libbpf to another and features
- * requested during loader program generation.
- */
-struct bpf_map_desc {
-	union {
-		/* input for the loader prog */
-		struct {
-			__aligned_u64 initial_value;
-			__u32 max_entries;
-		};
-		/* output of the loader prog */
-		struct {
-			int map_fd;
-		};
-	};
-};
-struct bpf_prog_desc {
-	int prog_fd;
-};
-
-struct bpf_loader_ctx {
-	size_t sz;
-	__u32 log_level;
-	__u32 log_size;
-	__u64 log_buf;
-};
-
-struct bpf_load_and_run_opts {
-	struct bpf_loader_ctx *ctx;
-	const void *data;
-	const void *insns;
-	__u32 data_sz;
-	__u32 insns_sz;
-	const char *errstr;
-};
-
-static inline int skel_sys_bpf(enum bpf_cmd cmd, union bpf_attr *attr,
-			  unsigned int size)
-{
-	return syscall(__NR_bpf, cmd, attr, size);
-}
-
-static inline int skel_closenz(int fd)
-{
-	if (fd > 0)
-		return close(fd);
-	return -EINVAL;
-}
-
-static inline int bpf_load_and_run(struct bpf_load_and_run_opts *opts)
-{
-	int map_fd = -1, prog_fd = -1, key = 0, err;
-	union bpf_attr attr;
-
-	map_fd = bpf_create_map_name(BPF_MAP_TYPE_ARRAY, "__loader.map", 4,
-				     opts->data_sz, 1, 0);
-	if (map_fd < 0) {
-		opts->errstr = "failed to create loader map";
-		err = -errno;
-		goto out;
-	}
-
-	err = bpf_map_update_elem(map_fd, &key, opts->data, 0);
-	if (err < 0) {
-		opts->errstr = "failed to update loader map";
-		err = -errno;
-		goto out;
-	}
-
-	memset(&attr, 0, sizeof(attr));
-	attr.prog_type = BPF_PROG_TYPE_SYSCALL;
-	attr.insns = (long) opts->insns;
-	attr.insn_cnt = opts->insns_sz / sizeof(struct bpf_insn);
-	attr.license = (long) "Dual BSD/GPL";
-	memcpy(attr.prog_name, "__loader.prog", sizeof("__loader.prog"));
-	attr.fd_array = (long) &map_fd;
-	attr.log_level = opts->ctx->log_level;
-	attr.log_size = opts->ctx->log_size;
-	attr.log_buf = opts->ctx->log_buf;
-	attr.prog_flags = BPF_F_SLEEPABLE;
-	prog_fd = skel_sys_bpf(BPF_PROG_LOAD, &attr, sizeof(attr));
-	if (prog_fd < 0) {
-		opts->errstr = "failed to load loader prog";
-		err = -errno;
-		goto out;
-	}
-
-	memset(&attr, 0, sizeof(attr));
-	attr.test.prog_fd = prog_fd;
-	attr.test.ctx_in = (long) opts->ctx;
-	attr.test.ctx_size_in = opts->ctx->sz;
-	err = skel_sys_bpf(BPF_PROG_RUN, &attr, sizeof(attr));
-	if (err < 0 || (int)attr.test.retval < 0) {
-		opts->errstr = "failed to execute loader prog";
-		if (err < 0) {
-			err = -errno;
-		} else {
-			err = (int)attr.test.retval;
-			errno = -err;
-		}
-		goto out;
-	}
-	err = 0;
-out:
-	if (map_fd >= 0)
-		close(map_fd);
-	if (prog_fd >= 0)
-		close(prog_fd);
-	return err;
-}
-
-#endif

src/strset.c

@@ -1,177 +0,0 @@
-// SPDX-License-Identifier: (LGPL-2.1 OR BSD-2-Clause)
-/* Copyright (c) 2021 Facebook */
-#include <stdint.h>
-#include <stdlib.h>
-#include <stdio.h>
-#include <errno.h>
-#include <linux/err.h>
-#include "hashmap.h"
-#include "libbpf_internal.h"
-#include "strset.h"
-
-struct strset {
-	void *strs_data;
-	size_t strs_data_len;
-	size_t strs_data_cap;
-	size_t strs_data_max_len;
-
-	/* lookup index for each unique string in strings set */
-	struct hashmap *strs_hash;
-};
-
-static size_t strset_hash_fn(const void *key, void *ctx)
-{
-	const struct strset *s = ctx;
-	const char *str = s->strs_data + (long)key;
-
-	return str_hash(str);
-}
-
-static bool strset_equal_fn(const void *key1, const void *key2, void *ctx)
-{
-	const struct strset *s = ctx;
-	const char *str1 = s->strs_data + (long)key1;
-	const char *str2 = s->strs_data + (long)key2;
-
-	return strcmp(str1, str2) == 0;
-}
-
-struct strset *strset__new(size_t max_data_sz, const char *init_data, size_t init_data_sz)
-{
-	struct strset *set = calloc(1, sizeof(*set));
-	struct hashmap *hash;
-	int err = -ENOMEM;
-
-	if (!set)
-		return ERR_PTR(-ENOMEM);
-
-	hash = hashmap__new(strset_hash_fn, strset_equal_fn, set);
-	if (IS_ERR(hash))
-		goto err_out;
-
-	set->strs_data_max_len = max_data_sz;
-	set->strs_hash = hash;
-
-	if (init_data) {
-		long off;
-
-		set->strs_data = malloc(init_data_sz);
-		if (!set->strs_data)
-			goto err_out;
-
-		memcpy(set->strs_data, init_data, init_data_sz);
-		set->strs_data_len = init_data_sz;
-		set->strs_data_cap = init_data_sz;
-
-		for (off = 0; off < set->strs_data_len; off += strlen(set->strs_data + off) + 1) {
-			/* hashmap__add() returns EEXIST if string with the same
-			 * content already is in the hash map
-			 */
-			err = hashmap__add(hash, (void *)off, (void *)off);
-			if (err == -EEXIST)
-				continue; /* duplicate */
-			if (err)
-				goto err_out;
-		}
-	}
-
-	return set;
-err_out:
-	strset__free(set);
-	return ERR_PTR(err);
-}
-
-void strset__free(struct strset *set)
-{
-	if (IS_ERR_OR_NULL(set))
-		return;
-
-	hashmap__free(set->strs_hash);
-	free(set->strs_data);
-	free(set);
-}
-
-size_t strset__data_size(const struct strset *set)
-{
-	return set->strs_data_len;
-}
-
-const char *strset__data(const struct strset *set)
-{
-	return set->strs_data;
-}
-
-static void *strset_add_str_mem(struct strset *set, size_t add_sz)
-{
-	return libbpf_add_mem(&set->strs_data, &set->strs_data_cap, 1,
-			      set->strs_data_len, set->strs_data_max_len, add_sz);
-}
-
-/* Find string offset that corresponds to a given string *s*.
- * Returns:
- *   - >0 offset into string data, if string is found;
- *   - -ENOENT, if string is not in the string data;
- *   - <0, on any other error.
- */
-int strset__find_str(struct strset *set, const char *s)
-{
-	long old_off, new_off, len;
-	void *p;
-
-	/* see strset__add_str() for why we do this */
-	len = strlen(s) + 1;
-	p = strset_add_str_mem(set, len);
-	if (!p)
-		return -ENOMEM;
-
-	new_off = set->strs_data_len;
-	memcpy(p, s, len);
-
-	if (hashmap__find(set->strs_hash, (void *)new_off, (void **)&old_off))
-		return old_off;
-
-	return -ENOENT;
-}
-
-/* Add a string s to the string data. If the string already exists, return its
- * offset within string data.
- * Returns:
- *   - > 0 offset into string data, on success;
- *   - < 0, on error.
- */
-int strset__add_str(struct strset *set, const char *s)
-{
-	long old_off, new_off, len;
-	void *p;
-	int err;
-
-	/* Hashmap keys are always offsets within set->strs_data, so to even
-	 * look up some string from the "outside", we need to first append it
-	 * at the end, so that it can be addressed with an offset. Luckily,
-	 * until set->strs_data_len is incremented, that string is just a piece
-	 * of garbage for the rest of the code, so no harm, no foul. On the
-	 * other hand, if the string is unique, it's already appended and
-	 * ready to be used, only a simple set->strs_data_len increment away.
-	 */
-	len = strlen(s) + 1;
-	p = strset_add_str_mem(set, len);
-	if (!p)
-		return -ENOMEM;
-
-	new_off = set->strs_data_len;
-	memcpy(p, s, len);
-
-	/* Now attempt to add the string, but only if the string with the same
-	 * contents doesn't exist already (HASHMAP_ADD strategy). If such
-	 * string exists, we'll get its offset in old_off (that's old_key).
-	 */
-	err = hashmap__insert(set->strs_hash, (void *)new_off, (void *)new_off,
-			      HASHMAP_ADD, (const void **)&old_off, NULL);
-	if (err == -EEXIST)
-		return old_off; /* duplicated string, return existing offset */
-	if (err)
-		return err;
-
-	set->strs_data_len += len; /* new unique string, adjust data length */
-	return new_off;
-}

src/strset.h

@@ -1,21 +0,0 @@
-/* SPDX-License-Identifier: (LGPL-2.1 OR BSD-2-Clause) */
-
-/* Copyright (c) 2021 Facebook */
-#ifndef __LIBBPF_STRSET_H
-#define __LIBBPF_STRSET_H
-
-#include <stdbool.h>
-#include <stddef.h>
-
-struct strset;
-
-struct strset *strset__new(size_t max_data_sz, const char *init_data, size_t init_data_sz);
-void strset__free(struct strset *set);
-
-const char *strset__data(const struct strset *set);
-size_t strset__data_size(const struct strset *set);
-
-int strset__find_str(struct strset *set, const char *s);
-int strset__add_str(struct strset *set, const char *s);
-
-#endif /* __LIBBPF_STRSET_H */

src/xsk.h

@@ -3,8 +3,7 @@
 /*
  * AF_XDP user-space access library.
  *
- * Copyright (c) 2018 - 2019 Intel Corporation.
- * Copyright (c) 2019 Facebook
+ * Copyright(c) 2018 - 2019 Intel Corporation.
  *
  * Author(s): Magnus Karlsson <magnus.karlsson@intel.com>
  */
@@ -14,80 +13,15 @@
 
 #include <stdio.h>
 #include <stdint.h>
-#include <stdbool.h>
 #include <linux/if_xdp.h>
 
 #include "libbpf.h"
+#include "libbpf_util.h"
 
 #ifdef __cplusplus
 extern "C" {
 #endif
 
-/* Load-Acquire Store-Release barriers used by the XDP socket
- * library. The following macros should *NOT* be considered part of
- * the xsk.h API, and is subject to change anytime.
- *
- * LIBRARY INTERNAL
- */
-
-#define __XSK_READ_ONCE(x) (*(volatile typeof(x) *)&x)
-#define __XSK_WRITE_ONCE(x, v) (*(volatile typeof(x) *)&x) = (v)
-
-#if defined(__i386__) || defined(__x86_64__)
-# define libbpf_smp_store_release(p, v)					\
-	do {								\
-		asm volatile("" : : : "memory");			\
-		__XSK_WRITE_ONCE(*p, v);				\
-	} while (0)
-# define libbpf_smp_load_acquire(p)					\
-	({								\
-		typeof(*p) ___p1 = __XSK_READ_ONCE(*p);			\
-		asm volatile("" : : : "memory");			\
-		___p1;							\
-	})
-#elif defined(__aarch64__)
-# define libbpf_smp_store_release(p, v)					\
-		asm volatile ("stlr %w1, %0" : "=Q" (*p) : "r" (v) : "memory")
-# define libbpf_smp_load_acquire(p)					\
-	({								\
-		typeof(*p) ___p1;					\
-		asm volatile ("ldar %w0, %1"				\
-			      : "=r" (___p1) : "Q" (*p) : "memory");	\
-		___p1;							\
-	})
-#elif defined(__riscv)
-# define libbpf_smp_store_release(p, v)					\
-	do {								\
-		asm volatile ("fence rw,w" : : : "memory");		\
-		__XSK_WRITE_ONCE(*p, v);				\
-	} while (0)
-# define libbpf_smp_load_acquire(p)					\
-	({								\
-		typeof(*p) ___p1 = __XSK_READ_ONCE(*p);			\
-		asm volatile ("fence r,rw" : : : "memory");		\
-		___p1;							\
-	})
-#endif
-
-#ifndef libbpf_smp_store_release
-#define libbpf_smp_store_release(p, v)					\
-	do {								\
-		__sync_synchronize();					\
-		__XSK_WRITE_ONCE(*p, v);				\
-	} while (0)
-#endif
-
-#ifndef libbpf_smp_load_acquire
-#define libbpf_smp_load_acquire(p)					\
-	({								\
-		typeof(*p) ___p1 = __XSK_READ_ONCE(*p);			\
-		__sync_synchronize();					\
-		___p1;							\
-	})
-#endif
-
-/* LIBRARY INTERNAL -- END */
-
 /* Do not access these members directly. Use the functions below. */
 #define DEFINE_XSK_RING(name) \
 struct name { \
@@ -162,8 +96,7 @@ static inline __u32 xsk_prod_nb_free(struct xsk_ring_prod *r, __u32 nb)
 	 * this function. Without this optimization it whould have been
 	 * free_entries = r->cached_prod - r->cached_cons + r->size.
 	 */
-	r->cached_cons = libbpf_smp_load_acquire(r->consumer);
-	r->cached_cons += r->size;
+	r->cached_cons = *r->consumer + r->size;
 
 	return r->cached_cons - r->cached_prod;
 }
@@ -173,14 +106,15 @@ static inline __u32 xsk_cons_nb_avail(struct xsk_ring_cons *r, __u32 nb)
 	__u32 entries = r->cached_prod - r->cached_cons;
 
 	if (entries == 0) {
-		r->cached_prod = libbpf_smp_load_acquire(r->producer);
+		r->cached_prod = *r->producer;
 		entries = r->cached_prod - r->cached_cons;
 	}
 
 	return (entries > nb) ? nb : entries;
 }
 
-static inline __u32 xsk_ring_prod__reserve(struct xsk_ring_prod *prod, __u32 nb, __u32 *idx)
+static inline size_t xsk_ring_prod__reserve(struct xsk_ring_prod *prod,
+					    size_t nb, __u32 *idx)
 {
 	if (xsk_prod_nb_free(prod, nb) < nb)
 		return 0;
@@ -191,19 +125,27 @@ static inline __u32 xsk_ring_prod__reserve(struct xsk_ring_prod *prod, __u32 nb,
 	return nb;
 }
 
-static inline void xsk_ring_prod__submit(struct xsk_ring_prod *prod, __u32 nb)
+static inline void xsk_ring_prod__submit(struct xsk_ring_prod *prod, size_t nb)
 {
 	/* Make sure everything has been written to the ring before indicating
 	 * this to the kernel by writing the producer pointer.
 	 */
-	libbpf_smp_store_release(prod->producer, *prod->producer + nb);
+	libbpf_smp_wmb();
+
+	*prod->producer += nb;
 }
 
-static inline __u32 xsk_ring_cons__peek(struct xsk_ring_cons *cons, __u32 nb, __u32 *idx)
+static inline size_t xsk_ring_cons__peek(struct xsk_ring_cons *cons,
+					 size_t nb, __u32 *idx)
 {
-	__u32 entries = xsk_cons_nb_avail(cons, nb);
+	size_t entries = xsk_cons_nb_avail(cons, nb);
 
 	if (entries > 0) {
+		/* Make sure we do not speculatively read the data before
+		 * we have received the packet buffers from the ring.
+		 */
+		libbpf_smp_rmb();
+
 		*idx = cons->cached_cons;
 		cons->cached_cons += entries;
 	}
@@ -211,18 +153,14 @@ static inline __u32 xsk_ring_cons__peek(struct xsk_ring_cons *cons, __u32 nb, __
 	return entries;
 }
 
-static inline void xsk_ring_cons__cancel(struct xsk_ring_cons *cons, __u32 nb)
-{
-	cons->cached_cons -= nb;
-}
-
-static inline void xsk_ring_cons__release(struct xsk_ring_cons *cons, __u32 nb)
+static inline void xsk_ring_cons__release(struct xsk_ring_cons *cons, size_t nb)
 {
 	/* Make sure data has been read before indicating we are done
 	 * with the entries by updating the consumer pointer.
 	 */
-	libbpf_smp_store_release(cons->consumer, *cons->consumer + nb);
+	libbpf_smp_rwmb();
 
+	*cons->consumer += nb;
 }
 
 static inline void *xsk_umem__get_data(void *umem_area, __u64 addr)
@@ -263,11 +201,6 @@ struct xsk_umem_config {
 	__u32 flags;
 };
 
-LIBBPF_API int xsk_setup_xdp_prog(int ifindex,
-				  int *xsks_map_fd);
-LIBBPF_API int xsk_socket__update_xskmap(struct xsk_socket *xsk,
-					 int xsks_map_fd);
-
 /* Flags for the libbpf_flags field. */
 #define XSK_LIBBPF_FLAGS__INHIBIT_PROG_LOAD (1 << 0)
 
@@ -301,15 +234,6 @@ LIBBPF_API int xsk_socket__create(struct xsk_socket **xsk,
 				  struct xsk_ring_cons *rx,
 				  struct xsk_ring_prod *tx,
 				  const struct xsk_socket_config *config);
-LIBBPF_API int
-xsk_socket__create_shared(struct xsk_socket **xsk_ptr,
-			  const char *ifname,
-			  __u32 queue_id, struct xsk_umem *umem,
-			  struct xsk_ring_cons *rx,
-			  struct xsk_ring_prod *tx,
-			  struct xsk_ring_prod *fill,
-			  struct xsk_ring_cons *comp,
-			  const struct xsk_socket_config *config);
 
 /* Returns 0 for success and -EBUSY if the umem is still in use. */
 LIBBPF_API int xsk_umem__delete(struct xsk_umem *umem);

travis-ci/managers/debian.sh

@@ -6,7 +6,7 @@ CONT_NAME="${CONT_NAME:-libbpf-debian-$DEBIAN_RELEASE}"
 ENV_VARS="${ENV_VARS:-}"
 DOCKER_RUN="${DOCKER_RUN:-docker run}"
 REPO_ROOT="${REPO_ROOT:-$PWD}"
-ADDITIONAL_DEPS=(clang pkg-config gcc-10)
+ADDITIONAL_DEPS=(clang pkg-config gcc-8)
 CFLAGS="-g -O2 -Werror -Wall"
 
 function info() {
@@ -18,10 +18,10 @@ function error() {
 }
 
 function docker_exec() {
-    docker exec $ENV_VARS $CONT_NAME "$@"
+    docker exec $ENV_VARS -it $CONT_NAME "$@"
 }
 
-set -eu
+set -e
 
 source "$(dirname $0)/travis_wait.bash"
 
@@ -31,6 +31,7 @@ for phase in "${PHASES[@]}"; do
             info "Setup phase"
             info "Using Debian $DEBIAN_RELEASE"
 
+            sudo apt-get -y -o Dpkg::Options::="--force-confnew" install docker-ce
             docker --version
 
             docker pull debian:$DEBIAN_RELEASE
@@ -38,24 +39,19 @@ for phase in "${PHASES[@]}"; do
             $DOCKER_RUN -v $REPO_ROOT:/build:rw \
                         -w /build --privileged=true --name $CONT_NAME \
                         -dit --net=host debian:$DEBIAN_RELEASE /bin/bash
-            echo -e "::group::Build Env Setup"
             docker_exec bash -c "echo deb-src http://deb.debian.org/debian $DEBIAN_RELEASE main >>/etc/apt/sources.list"
             docker_exec apt-get -y update
-            docker_exec apt-get -y install aptitude
-            docker_exec aptitude -y build-dep libelf-dev
-            docker_exec aptitude -y install libelf-dev
-            docker_exec aptitude -y install "${ADDITIONAL_DEPS[@]}"
-            echo -e "::endgroup::"
+            docker_exec apt-get -y build-dep libelf-dev
+            docker_exec apt-get -y install libelf-dev
+            docker_exec apt-get -y install "${ADDITIONAL_DEPS[@]}"
             ;;
-        RUN|RUN_CLANG|RUN_GCC10|RUN_ASAN|RUN_CLANG_ASAN|RUN_GCC10_ASAN)
-            CC="cc"
+        RUN|RUN_CLANG|RUN_GCC8|RUN_ASAN|RUN_CLANG_ASAN|RUN_GCC8_ASAN)
             if [[ "$phase" = *"CLANG"* ]]; then
                 ENV_VARS="-e CC=clang -e CXX=clang++"
                 CC="clang"
-            elif [[ "$phase" = *"GCC10"* ]]; then
-                ENV_VARS="-e CC=gcc-10 -e CXX=g++-10"
-                CC="gcc-10"
-                CFLAGS="${CFLAGS} -Wno-stringop-truncation"
+            elif [[ "$phase" = *"GCC8"* ]]; then
+                ENV_VARS="-e CC=gcc-8 -e CXX=g++-8"
+                CC="gcc-8"
             else
                 CFLAGS="${CFLAGS} -Wno-stringop-truncation"
             fi
@@ -63,9 +59,9 @@ for phase in "${PHASES[@]}"; do
                 CFLAGS="${CFLAGS} -fsanitize=address,undefined"
             fi
             docker_exec mkdir build install
-            docker_exec ${CC} --version
+            docker_exec ${CC:-cc} --version
             info "build"
-            docker_exec make -j$((4*$(nproc))) CFLAGS="${CFLAGS}" -C ./src -B OBJDIR=../build
+	    docker_exec make -j$((4*$(nproc))) CFLAGS="${CFLAGS}" -C ./src -B OBJDIR=../build
             info "ldd build/libbpf.so:"
             docker_exec ldd build/libbpf.so
             if ! docker_exec ldd build/libbpf.so | grep -q libelf; then
@@ -74,8 +70,7 @@ for phase in "${PHASES[@]}"; do
             fi
             info "install"
             docker_exec make -j$((4*$(nproc))) -C src OBJDIR=../build DESTDIR=../install install
-            info "link binary"
-            docker_exec bash -c "CFLAGS=\"${CFLAGS}\" ./travis-ci/managers/test_compile.sh"
+            docker_exec rm -rf build install
             ;;
         CLEANUP)
             info "Cleanup phase"

travis-ci/managers/test_compile.sh

@@ -1,14 +0,0 @@
-#!/bin/bash
-set -euox pipefail
-
-CFLAGS=${CFLAGS:-}
-
-cat << EOF > main.c
-#include <bpf/libbpf.h>
-int main() {
-  return bpf_object__open(0) < 0;
-}
-EOF
-
-# static linking
-${CC:-cc} ${CFLAGS} -o main -I./install/usr/include main.c ./build/libbpf.a -lelf -lz

travis-ci/managers/ubuntu.sh

@@ -1,16 +1,20 @@
 #!/bin/bash
-set -eux
+set -e
+set -x
 
-RELEASE="focal"
+RELEASE="bionic"
+
+echo "deb-src http://archive.ubuntu.com/ubuntu/ $RELEASE main restricted universe multiverse" >>/etc/apt/sources.list
 
 apt-get update
-apt-get install -y pkg-config
+apt-get -y build-dep libelf-dev
+apt-get install -y libelf-dev pkg-config
 
 source "$(dirname $0)/travis_wait.bash"
 
 cd $REPO_ROOT
 
-CFLAGS="-g -O2 -Werror -Wall -fsanitize=address,undefined -Wno-stringop-truncation"
+CFLAGS="-g -O2 -Werror -Wall -fsanitize=address,undefined"
 mkdir build install
 cc --version
 make -j$((4*$(nproc))) CFLAGS="${CFLAGS}" -C ./src -B OBJDIR=../build
@@ -20,4 +24,4 @@ if ! ldd build/libbpf.so | grep -q libelf; then
     exit 1
 fi
 make -j$((4*$(nproc))) -C src OBJDIR=../build DESTDIR=../install install
-CFLAGS=${CFLAGS} $(dirname $0)/test_compile.sh
+rm -rf build install

travis-ci/vmtest/build_pahole.sh

@@ -1,25 +1,17 @@
 #!/bin/bash
 
-set -eu
-
-source $(cd $(dirname $0) && pwd)/helpers.sh
+set -eux
 
 CWD=$(pwd)
 REPO_PATH=$1
-PAHOLE_ORIGIN=${PAHOLE_ORIGIN:-https://git.kernel.org/pub/scm/devel/pahole/pahole.git}
-PAHOLE_BRANCH=${PAHOLE_BRANCH:-master}
-
-travis_fold start build_pahole "Building pahole ${PAHOLE_ORIGIN} ${PAHOLE_BRANCH}"
+PAHOLE_ORIGIN=https://git.kernel.org/pub/scm/devel/pahole/pahole.git
 
 mkdir -p ${REPO_PATH}
 cd ${REPO_PATH}
 git init
 git remote add origin ${PAHOLE_ORIGIN}
 git fetch origin
-git checkout ${PAHOLE_BRANCH}
-
-# temporary work-around to bump pahole to 1.22 before it is officially released
-sed -i 's/DDWARVES_MINOR_VERSION=21/DDWARVES_MINOR_VERSION=22/' CMakeLists.txt
+git checkout master
 
 mkdir -p build
 cd build
@@ -31,4 +23,3 @@ export LD_LIBRARY_PATH=${LD_LIBRARY_PATH:-}:/usr/local/lib
 ldd $(which pahole)
 pahole --version
 
-travis_fold end build_pahole

travis-ci/vmtest/build_selftests.sh

@@ -1,35 +1,23 @@
 #!/bin/bash
 
-set -euo pipefail
+set -euxo pipefail
 
-source $(cd $(dirname $0) && pwd)/helpers.sh
-
-travis_fold start prepare_selftests "Building selftests"
-
-sudo apt-get -y install python-docutils # for rst2man
-
-LLVM_VER=14
+LLVM_VER=11
 LIBBPF_PATH="${REPO_ROOT}"
+REPO_PATH="travis-ci/vmtest/bpf-next"
 
 PREPARE_SELFTESTS_SCRIPT=${VMTEST_ROOT}/prepare_selftests-${KERNEL}.sh
 if [ -f "${PREPARE_SELFTESTS_SCRIPT}" ]; then
 	(cd "${REPO_ROOT}/${REPO_PATH}/tools/testing/selftests/bpf" && ${PREPARE_SELFTESTS_SCRIPT})
 fi
 
-if [[ "${KERNEL}" = 'LATEST' ]]; then
-	VMLINUX_H=
-else
-	VMLINUX_H=${VMTEST_ROOT}/vmlinux.h
-fi
-
 make \
 	CLANG=clang-${LLVM_VER} \
 	LLC=llc-${LLVM_VER} \
 	LLVM_STRIP=llvm-strip-${LLVM_VER} \
 	VMLINUX_BTF="${VMLINUX_BTF}" \
-	VMLINUX_H=${VMLINUX_H} \
 	-C "${REPO_ROOT}/${REPO_PATH}/tools/testing/selftests/bpf" \
-	-j $((4*$(nproc))) >/dev/null
+	-j $((4*$(nproc)))
 mkdir ${LIBBPF_PATH}/selftests
 cp -R "${REPO_ROOT}/${REPO_PATH}/tools/testing/selftests/bpf" \
 	${LIBBPF_PATH}/selftests
@@ -38,5 +26,3 @@ rm selftests/bpf/.gitignore
 git add selftests
 
 git add "${VMTEST_ROOT}/configs/blacklist"
-
-travis_fold end prepare_selftests

travis-ci/vmtest/checkout_latest_kernel.sh

@@ -1,54 +1,24 @@
 #!/bin/bash
 
-set -eu
-
-source $(cd $(dirname $0) && pwd)/helpers.sh
+set -eux
 
 CWD=$(pwd)
 LIBBPF_PATH=$(pwd)
 REPO_PATH=$1
 
-KERNEL_ORIGIN=${KERNEL_ORIGIN:-https://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf-next.git}
-KERNEL_BRANCH=${KERNEL_BRANCH:-CHECKPOINT}
-if [[ "${KERNEL_BRANCH}" = 'CHECKPOINT' ]]; then
-  echo "using CHECKPOINT sha1"
-  LINUX_SHA=$(cat ${LIBBPF_PATH}/CHECKPOINT-COMMIT)
-else
-  echo "using ${KERNEL_BRANCH} sha1"
-  LINUX_SHA=$(git ls-remote ${KERNEL_ORIGIN} ${KERNEL_BRANCH} | awk '{print $1}')
-fi
-SNAPSHOT_URL=${KERNEL_ORIGIN}/snapshot/bpf-next-${LINUX_SHA}.tar.gz
+BPF_NEXT_ORIGIN=https://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf-next.git
+LINUX_SHA=$(cat ${LIBBPF_PATH}/CHECKPOINT-COMMIT)
 
 echo REPO_PATH = ${REPO_PATH}
-
-echo KERNEL_ORIGIN = ${KERNEL_ORIGIN}
 echo LINUX_SHA = ${LINUX_SHA}
-echo SNAPSHOT_URL = ${SNAPSHOT_URL}
 
 if [ ! -d "${REPO_PATH}" ]; then
-	echo
-	travis_fold start pull_kernel_srcs "Fetching kernel sources"
-
-	mkdir -p $(dirname "${REPO_PATH}")
-	cd $(dirname "${REPO_PATH}")
-	# attempt to fetch desired bpf-next repo snapshot
-	if wget -nv ${SNAPSHOT_URL} && tar xf bpf-next-${LINUX_SHA}.tar.gz --totals ; then
-		mv bpf-next-${LINUX_SHA} $(basename ${REPO_PATH})
-	else
-		# but fallback to git fetch approach if that fails
-		mkdir -p $(basename ${REPO_PATH})
-		cd $(basename ${REPO_PATH})
-		git init
-		git remote add bpf-next ${KERNEL_ORIGIN}
-		# try shallow clone first
-		git fetch --depth 32 bpf-next
-		# check if desired SHA exists
-		if ! git cat-file -e ${LINUX_SHA}^{commit} ; then
-			# if not, fetch all of bpf-next; slow and painful
-			git fetch bpf-next
-		fi
-		git reset --hard ${LINUX_SHA}
-	fi
-
-	travis_fold end pull_kernel_srcs
+	mkdir -p ${REPO_PATH}
+	cd ${REPO_PATH}
+	git init
+	git remote add bpf-next ${BPF_NEXT_ORIGIN}
+	for depth in 32 64 128; do
+		git fetch --depth ${depth} bpf-next
+		git reset --hard ${LINUX_SHA} && break
+	done
 fi

travis-ci/vmtest/configs/INDEX

@@ -1,8 +1,6 @@
 INDEX	https://libbpf-vmtest.s3-us-west-1.amazonaws.com/x86_64/INDEX
-libbpf-vmtest-rootfs-2020.09.27.tar.zst	https://libbpf-vmtest.s3-us-west-1.amazonaws.com/x86_64/libbpf-vmtest-rootfs-2020.09.27.tar.zst
-vmlinux-4.9.0.zst	https://libbpf-vmtest.s3-us-west-1.amazonaws.com/x86_64/vmlinux-4.9.0.zst
+libbpf-vmtest-rootfs-2020.03.11.tar.zst	https://libbpf-vmtest.s3-us-west-1.amazonaws.com/x86_64/libbpf-vmtest-rootfs-2020.03.11.tar.zst
 vmlinux-5.5.0-rc6.zst	https://libbpf-vmtest.s3-us-west-1.amazonaws.com/x86_64/vmlinux-5.5.0-rc6.zst
 vmlinux-5.5.0.zst	https://libbpf-vmtest.s3-us-west-1.amazonaws.com/x86_64/vmlinux-5.5.0.zst
 vmlinuz-5.5.0-rc6	https://libbpf-vmtest.s3-us-west-1.amazonaws.com/x86_64/vmlinuz-5.5.0-rc6
 vmlinuz-5.5.0	https://libbpf-vmtest.s3-us-west-1.amazonaws.com/x86_64/vmlinuz-5.5.0
-vmlinuz-4.9.0	https://libbpf-vmtest.s3-us-west-1.amazonaws.com/x86_64/vmlinuz-4.9.0

travis-ci/vmtest/configs/blacklist/BLACKLIST-5.5.0

@@ -1,60 +1,33 @@
 # 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
+
+# latest Clang generates code that fails to verify
+bpf_verif_scale
+#bpf_verif_scale/strobemeta.o
+#bpf_verif_scale/strobemeta_nounroll1.o
+#bpf_verif_scale/strobemeta_nounroll2.o
+
 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
@@ -62,53 +35,19 @@ ringbuf			# BPF_MAP_TYPE_RINGBUF is supported in 5.8+
 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+
-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+
+skb_ctx			# ctx_{size, }_{in, out} in BPF_PROG_TEST_RUN is missing
 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
+
+# TEMPORARILY DISABLED
+send_signal		# flaky
+cls_redirect		# latest Clang breaks BPF verification

travis-ci/vmtest/configs/blacklist/BLACKLIST-latest

@@ -1,5 +1,5 @@
-# TEMPORARY
-get_stack_raw_tp    # spams with kernel warnings until next bpf -> bpf-next merge
-stacktrace_build_id_nmi
-stacktrace_build_id
-task_fd_query_rawtp
+# TEMPORARILY DISABLED
+send_signal		# flaky
+test_lsm		# semi-working
+sk_assign		# needs better setup in Travis CI
+core_reloc		# temporary test breakage

travis-ci/vmtest/configs/latest.config

@@ -1,15 +1,18 @@
 #
 # Automatically generated file; DO NOT EDIT.
-# Linux/x86 5.9.0-rc1 Kernel Configuration
+# Linux/x86 5.6.0-rc3 Kernel Configuration
+#
+
+#
+# Compiler: gcc (GCC) 4.8.5 20150623 (Red Hat 4.8.5-36)
 #
-CONFIG_CC_VERSION_TEXT="gcc (GCC) 8.2.1 20180801 (Red Hat 8.2.1-2)"
 CONFIG_CC_IS_GCC=y
-CONFIG_GCC_VERSION=80201
-CONFIG_LD_VERSION=230000000
+CONFIG_GCC_VERSION=40805
 CONFIG_CLANG_VERSION=0
 CONFIG_CC_CAN_LINK=y
-CONFIG_CC_CAN_LINK_STATIC=y
 CONFIG_CC_HAS_ASM_GOTO=y
+CONFIG_CC_HAS_WARN_MAYBE_UNINITIALIZED=y
+CONFIG_CC_DISABLE_WARN_MAYBE_UNINITIALIZED=y
 CONFIG_IRQ_WORK=y
 CONFIG_BUILDTIME_TABLE_SORT=y
 CONFIG_THREAD_INFO_IN_TASK=y
@@ -28,27 +31,22 @@ CONFIG_HAVE_KERNEL_LZMA=y
 CONFIG_HAVE_KERNEL_XZ=y
 CONFIG_HAVE_KERNEL_LZO=y
 CONFIG_HAVE_KERNEL_LZ4=y
-CONFIG_HAVE_KERNEL_ZSTD=y
 CONFIG_KERNEL_GZIP=y
 # CONFIG_KERNEL_BZIP2 is not set
 # CONFIG_KERNEL_LZMA is not set
 # CONFIG_KERNEL_XZ is not set
 # CONFIG_KERNEL_LZO is not set
 # CONFIG_KERNEL_LZ4 is not set
-# CONFIG_KERNEL_ZSTD is not set
-CONFIG_DEFAULT_INIT=""
 CONFIG_DEFAULT_HOSTNAME="(none)"
 CONFIG_SWAP=y
 CONFIG_SYSVIPC=y
 CONFIG_SYSVIPC_SYSCTL=y
 CONFIG_POSIX_MQUEUE=y
 CONFIG_POSIX_MQUEUE_SYSCTL=y
-# CONFIG_WATCH_QUEUE is not set
 CONFIG_CROSS_MEMORY_ATTACH=y
 # CONFIG_USELIB is not set
-CONFIG_AUDIT=y
+# CONFIG_AUDIT is not set
 CONFIG_HAVE_ARCH_AUDITSYSCALL=y
-CONFIG_AUDITSYSCALL=y
 
 #
 # IRQ subsystem
@@ -58,7 +56,6 @@ CONFIG_GENERIC_IRQ_SHOW=y
 CONFIG_GENERIC_IRQ_EFFECTIVE_AFF_MASK=y
 CONFIG_GENERIC_PENDING_IRQ=y
 CONFIG_GENERIC_IRQ_MIGRATION=y
-CONFIG_HARDIRQS_SW_RESEND=y
 CONFIG_IRQ_DOMAIN=y
 CONFIG_IRQ_DOMAIN_HIERARCHY=y
 CONFIG_GENERIC_MSI_IRQ=y
@@ -71,6 +68,7 @@ CONFIG_SPARSE_IRQ=y
 # end of IRQ subsystem
 
 CONFIG_CLOCKSOURCE_WATCHDOG=y
+CONFIG_ARCH_CLOCKSOURCE_DATA=y
 CONFIG_ARCH_CLOCKSOURCE_INIT=y
 CONFIG_CLOCKSOURCE_VALIDATE_LAST_CYCLE=y
 CONFIG_GENERIC_TIME_VSYSCALL=y
@@ -78,8 +76,6 @@ CONFIG_GENERIC_CLOCKEVENTS=y
 CONFIG_GENERIC_CLOCKEVENTS_BROADCAST=y
 CONFIG_GENERIC_CLOCKEVENTS_MIN_ADJUST=y
 CONFIG_GENERIC_CMOS_UPDATE=y
-CONFIG_HAVE_POSIX_CPU_TIMERS_TASK_WORK=y
-CONFIG_POSIX_CPU_TIMERS_TASK_WORK=y
 
 #
 # Timers subsystem
@@ -124,9 +120,7 @@ CONFIG_PREEMPT_RCU=y
 # CONFIG_RCU_EXPERT is not set
 CONFIG_SRCU=y
 CONFIG_TREE_SRCU=y
-CONFIG_TASKS_RCU_GENERIC=y
 CONFIG_TASKS_RCU=y
-CONFIG_TASKS_RUDE_RCU=y
 CONFIG_RCU_STALL_COMMON=y
 CONFIG_RCU_NEED_SEGCBLIST=y
 # end of RCU Subsystem
@@ -142,7 +136,6 @@ CONFIG_HAVE_UNSTABLE_SCHED_CLOCK=y
 #
 # Scheduler features
 #
-# CONFIG_UCLAMP_TASK is not set
 # end of Scheduler features
 
 CONFIG_ARCH_SUPPORTS_NUMA_BALANCING=y
@@ -155,6 +148,7 @@ CONFIG_CGROUPS=y
 CONFIG_PAGE_COUNTER=y
 CONFIG_MEMCG=y
 CONFIG_MEMCG_SWAP=y
+CONFIG_MEMCG_SWAP_ENABLED=y
 CONFIG_MEMCG_KMEM=y
 CONFIG_BLK_CGROUP=y
 CONFIG_CGROUP_WRITEBACK=y
@@ -193,7 +187,6 @@ CONFIG_RD_LZMA=y
 CONFIG_RD_XZ=y
 CONFIG_RD_LZO=y
 CONFIG_RD_LZ4=y
-CONFIG_RD_ZSTD=y
 CONFIG_BOOT_CONFIG=y
 CONFIG_CC_OPTIMIZE_FOR_PERFORMANCE=y
 # CONFIG_CC_OPTIMIZE_FOR_SIZE is not set
@@ -228,14 +221,10 @@ CONFIG_KALLSYMS=y
 CONFIG_KALLSYMS_ALL=y
 CONFIG_KALLSYMS_ABSOLUTE_PERCPU=y
 CONFIG_KALLSYMS_BASE_RELATIVE=y
-CONFIG_BPF_LSM=y
 CONFIG_BPF_SYSCALL=y
 CONFIG_ARCH_WANT_DEFAULT_BPF_JIT=y
 CONFIG_BPF_JIT_ALWAYS_ON=y
 CONFIG_BPF_JIT_DEFAULT_ON=y
-CONFIG_USERMODE_DRIVER=y
-CONFIG_BPF_PRELOAD=y
-CONFIG_BPF_PRELOAD_UMD=y
 # CONFIG_USERFAULTFD is not set
 CONFIG_ARCH_HAS_MEMBARRIER_SYNC_CORE=y
 CONFIG_RSEQ=y
@@ -272,6 +261,7 @@ CONFIG_X86_64=y
 CONFIG_X86=y
 CONFIG_INSTRUCTION_DECODER=y
 CONFIG_OUTPUT_FORMAT="elf64-x86-64"
+CONFIG_ARCH_DEFCONFIG="arch/x86/configs/x86_64_defconfig"
 CONFIG_LOCKDEP_SUPPORT=y
 CONFIG_STACKTRACE_SUPPORT=y
 CONFIG_MMU=y
@@ -389,6 +379,7 @@ CONFIG_X86_DIRECT_GBPAGES=y
 CONFIG_NUMA=y
 CONFIG_AMD_NUMA=y
 CONFIG_X86_64_ACPI_NUMA=y
+CONFIG_NODES_SPAN_OTHER_NODES=y
 # CONFIG_NUMA_EMU is not set
 CONFIG_NODES_SHIFT=6
 CONFIG_ARCH_SPARSEMEM_ENABLE=y
@@ -461,12 +452,12 @@ CONFIG_ACPI_SYSTEM_POWER_STATES_SUPPORT=y
 # CONFIG_ACPI_DEBUGGER is not set
 # CONFIG_ACPI_SPCR_TABLE is not set
 CONFIG_ACPI_LPIT=y
+# CONFIG_ACPI_PROCFS_POWER is not set
 # CONFIG_ACPI_REV_OVERRIDE_POSSIBLE is not set
 # CONFIG_ACPI_EC_DEBUGFS is not set
 # CONFIG_ACPI_AC is not set
 # CONFIG_ACPI_BATTERY is not set
 # CONFIG_ACPI_BUTTON is not set
-# CONFIG_ACPI_TINY_POWER_BUTTON is not set
 # CONFIG_ACPI_VIDEO is not set
 # CONFIG_ACPI_FAN is not set
 # CONFIG_ACPI_DOCK is not set
@@ -519,7 +510,7 @@ CONFIG_CPU_FREQ_GOV_PERFORMANCE=y
 CONFIG_CPU_FREQ_GOV_USERSPACE=y
 CONFIG_CPU_FREQ_GOV_ONDEMAND=y
 CONFIG_CPU_FREQ_GOV_CONSERVATIVE=y
-CONFIG_CPU_FREQ_GOV_SCHEDUTIL=y
+# CONFIG_CPU_FREQ_GOV_SCHEDUTIL is not set
 
 #
 # CPU frequency scaling drivers
@@ -589,7 +580,6 @@ CONFIG_EFI_ESRT=y
 CONFIG_EFI_RUNTIME_MAP=y
 # CONFIG_EFI_FAKE_MEMMAP is not set
 CONFIG_EFI_RUNTIME_WRAPPERS=y
-CONFIG_EFI_GENERIC_STUB_INITRD_CMDLINE_LOADER=y
 # CONFIG_EFI_CAPSULE_LOADER is not set
 # CONFIG_EFI_TEST is not set
 # CONFIG_APPLE_PROPERTIES is not set
@@ -609,10 +599,8 @@ CONFIG_EFI_EARLYCON=y
 CONFIG_HAVE_KVM=y
 CONFIG_VIRTUALIZATION=y
 # CONFIG_KVM is not set
-CONFIG_KVM_WERROR=y
-CONFIG_AS_AVX512=y
-CONFIG_AS_SHA1_NI=y
-CONFIG_AS_SHA256_NI=y
+# CONFIG_VHOST_NET is not set
+# CONFIG_VHOST_CROSS_ENDIAN_LEGACY is not set
 
 #
 # General architecture-dependent options
@@ -620,7 +608,6 @@ CONFIG_AS_SHA256_NI=y
 CONFIG_CRASH_CORE=y
 CONFIG_KEXEC_CORE=y
 CONFIG_HOTPLUG_SMT=y
-CONFIG_GENERIC_ENTRY=y
 # CONFIG_OPROFILE is not set
 CONFIG_HAVE_OPROFILE=y
 CONFIG_OPROFILE_NMI_TIMER=y
@@ -652,6 +639,7 @@ CONFIG_HAVE_ASM_MODVERSIONS=y
 CONFIG_HAVE_REGS_AND_STACK_ACCESS_API=y
 CONFIG_HAVE_RSEQ=y
 CONFIG_HAVE_FUNCTION_ARG_ACCESS_API=y
+CONFIG_HAVE_CLK=y
 CONFIG_HAVE_HW_BREAKPOINT=y
 CONFIG_HAVE_MIXED_BREAKPOINTS_REGS=y
 CONFIG_HAVE_USER_RETURN_NOTIFIER=y
@@ -669,6 +657,7 @@ CONFIG_HAVE_ARCH_SECCOMP_FILTER=y
 CONFIG_SECCOMP_FILTER=y
 CONFIG_HAVE_ARCH_STACKLEAK=y
 CONFIG_HAVE_STACKPROTECTOR=y
+CONFIG_CC_HAS_STACKPROTECTOR_NONE=y
 # CONFIG_STACKPROTECTOR is not set
 CONFIG_HAVE_ARCH_WITHIN_STACK_FRAMES=y
 CONFIG_HAVE_CONTEXT_TRACKING=y
@@ -682,10 +671,12 @@ CONFIG_ARCH_WANT_HUGE_PMD_SHARE=y
 CONFIG_HAVE_ARCH_SOFT_DIRTY=y
 CONFIG_HAVE_MOD_ARCH_SPECIFIC=y
 CONFIG_MODULES_USE_ELF_RELA=y
+CONFIG_HAVE_IRQ_EXIT_ON_IRQ_STACK=y
 CONFIG_ARCH_HAS_ELF_RANDOMIZE=y
 CONFIG_HAVE_ARCH_MMAP_RND_BITS=y
 CONFIG_HAVE_EXIT_THREAD=y
 CONFIG_ARCH_MMAP_RND_BITS=28
+CONFIG_HAVE_COPY_THREAD_TLS=y
 CONFIG_HAVE_STACK_VALIDATION=y
 CONFIG_HAVE_RELIABLE_STACKTRACE=y
 CONFIG_COMPAT_32BIT_TIME=y
@@ -707,6 +698,7 @@ CONFIG_ARCH_HAS_MEM_ENCRYPT=y
 CONFIG_ARCH_HAS_GCOV_PROFILE_ALL=y
 # end of GCOV-based kernel profiling
 
+CONFIG_PLUGIN_HOSTCC=""
 CONFIG_HAVE_GCC_PLUGINS=y
 # end of General architecture-dependent options
 
@@ -740,7 +732,6 @@ CONFIG_BLK_CGROUP_IOLATENCY=y
 # CONFIG_BLK_CGROUP_IOCOST is not set
 CONFIG_BLK_DEBUG_FS=y
 # CONFIG_BLK_SED_OPAL is not set
-# CONFIG_BLK_INLINE_ENCRYPTION is not set
 
 #
 # Partition Types
@@ -788,7 +779,6 @@ CONFIG_ARCH_USE_QUEUED_SPINLOCKS=y
 CONFIG_QUEUED_SPINLOCKS=y
 CONFIG_ARCH_USE_QUEUED_RWLOCKS=y
 CONFIG_QUEUED_RWLOCKS=y
-CONFIG_ARCH_HAS_NON_OVERLAPPING_ADDRESS_SPACE=y
 CONFIG_ARCH_HAS_SYNC_CORE_BEFORE_USERMODE=y
 CONFIG_ARCH_HAS_SYSCALL_WRAPPER=y
 CONFIG_FREEZER=y
@@ -811,9 +801,11 @@ CONFIG_SELECT_MEMORY_MODEL=y
 CONFIG_SPARSEMEM_MANUAL=y
 CONFIG_SPARSEMEM=y
 CONFIG_NEED_MULTIPLE_NODES=y
+CONFIG_HAVE_MEMORY_PRESENT=y
 CONFIG_SPARSEMEM_EXTREME=y
 CONFIG_SPARSEMEM_VMEMMAP_ENABLE=y
 CONFIG_SPARSEMEM_VMEMMAP=y
+CONFIG_HAVE_MEMBLOCK_NODE_MAP=y
 CONFIG_HAVE_FAST_GUP=y
 CONFIG_MEMORY_ISOLATION=y
 # CONFIG_MEMORY_HOTPLUG is not set
@@ -821,7 +813,6 @@ CONFIG_SPLIT_PTLOCK_CPUS=4
 CONFIG_MEMORY_BALLOON=y
 CONFIG_BALLOON_COMPACTION=y
 CONFIG_COMPACTION=y
-CONFIG_PAGE_REPORTING=y
 CONFIG_MIGRATION=y
 CONFIG_CONTIG_ALLOC=y
 CONFIG_PHYS_ADDR_T_64BIT=y
@@ -837,6 +828,7 @@ CONFIG_TRANSPARENT_HUGEPAGE=y
 CONFIG_TRANSPARENT_HUGEPAGE_MADVISE=y
 CONFIG_ARCH_WANTS_THP_SWAP=y
 CONFIG_THP_SWAP=y
+CONFIG_TRANSPARENT_HUGE_PAGECACHE=y
 # CONFIG_CLEANCACHE is not set
 # CONFIG_FRONTSWAP is not set
 CONFIG_CMA=y
@@ -957,7 +949,6 @@ CONFIG_IPV6_SUBTREES=y
 CONFIG_IPV6_SEG6_LWTUNNEL=y
 # CONFIG_IPV6_SEG6_HMAC is not set
 CONFIG_IPV6_SEG6_BPF=y
-# CONFIG_IPV6_RPL_LWTUNNEL is not set
 CONFIG_NETLABEL=y
 # CONFIG_MPTCP is not set
 CONFIG_NETWORK_SECMARK=y
@@ -988,7 +979,6 @@ CONFIG_NETFILTER_XTABLES=y
 #
 # Xtables targets
 #
-# CONFIG_NETFILTER_XT_TARGET_AUDIT is not set
 # CONFIG_NETFILTER_XT_TARGET_CLASSIFY is not set
 # CONFIG_NETFILTER_XT_TARGET_HMARK is not set
 # CONFIG_NETFILTER_XT_TARGET_IDLETIMER is not set
@@ -1192,7 +1182,6 @@ CONFIG_NET_ACT_BPF=y
 # CONFIG_NET_ACT_SKBMOD is not set
 # CONFIG_NET_ACT_IFE is not set
 # CONFIG_NET_ACT_TUNNEL_KEY is not set
-# CONFIG_NET_ACT_GATE is not set
 CONFIG_NET_TC_SKB_EXT=y
 CONFIG_NET_SCH_FIFO=y
 CONFIG_DCB=y
@@ -1208,7 +1197,6 @@ CONFIG_MPLS=y
 # CONFIG_HSR is not set
 # CONFIG_NET_SWITCHDEV is not set
 # CONFIG_NET_L3_MASTER_DEV is not set
-# CONFIG_QRTR is not set
 # CONFIG_NET_NCSI is not set
 CONFIG_RPS=y
 CONFIG_RFS_ACCEL=y
@@ -1307,11 +1295,6 @@ CONFIG_PCI_LABEL=y
 # CONFIG_PCI_MESON is not set
 # end of DesignWare PCI Core Support
 
-#
-# Mobiveil PCIe Core Support
-#
-# end of Mobiveil PCIe Core Support
-
 #
 # Cadence PCIe controllers support
 #
@@ -1367,7 +1350,6 @@ CONFIG_DMA_SHARED_BUFFER=y
 #
 # Bus devices
 #
-# CONFIG_MHI_BUS is not set
 # end of Bus devices
 
 # CONFIG_CONNECTOR is not set
@@ -1388,7 +1370,7 @@ CONFIG_BLK_DEV=y
 # CONFIG_BLK_DEV_FD is not set
 # CONFIG_BLK_DEV_PCIESSD_MTIP32XX is not set
 # CONFIG_BLK_DEV_UMEM is not set
-CONFIG_BLK_DEV_LOOP=y
+# CONFIG_BLK_DEV_LOOP is not set
 # CONFIG_BLK_DEV_DRBD is not set
 # CONFIG_BLK_DEV_NBD is not set
 # CONFIG_BLK_DEV_SKD is not set
@@ -1486,7 +1468,7 @@ CONFIG_SCSI_MOD=y
 # CONFIG_MACINTOSH_DRIVERS is not set
 CONFIG_NETDEVICES=y
 CONFIG_NET_CORE=y
-CONFIG_BONDING=y
+# CONFIG_BONDING is not set
 # CONFIG_DUMMY is not set
 # CONFIG_WIREGUARD is not set
 # CONFIG_EQUALIZER is not set
@@ -1595,7 +1577,23 @@ CONFIG_HW_CONSOLE=y
 CONFIG_VT_HW_CONSOLE_BINDING=y
 CONFIG_UNIX98_PTYS=y
 # CONFIG_LEGACY_PTYS is not set
+CONFIG_SERIAL_NONSTANDARD=y
+# CONFIG_ROCKETPORT is not set
+# CONFIG_CYCLADES is not set
+# CONFIG_MOXA_INTELLIO is not set
+# CONFIG_MOXA_SMARTIO is not set
+# CONFIG_SYNCLINK is not set
+# CONFIG_SYNCLINKMP is not set
+# CONFIG_SYNCLINK_GT is not set
+# CONFIG_NOZOMI is not set
+# CONFIG_ISI is not set
+# CONFIG_N_HDLC is not set
+# CONFIG_N_GSM is not set
+# CONFIG_TRACE_SINK is not set
+# CONFIG_NULL_TTY is not set
 CONFIG_LDISC_AUTOLOAD=y
+CONFIG_DEVMEM=y
+CONFIG_DEVKMEM=y
 
 #
 # Serial drivers
@@ -1628,7 +1626,6 @@ CONFIG_SERIAL_8250_RSA=y
 CONFIG_SERIAL_CORE=y
 CONFIG_SERIAL_CORE_CONSOLE=y
 # CONFIG_SERIAL_JSM is not set
-# CONFIG_SERIAL_LANTIQ is not set
 # CONFIG_SERIAL_SCCNXP is not set
 # CONFIG_SERIAL_ALTERA_JTAGUART is not set
 # CONFIG_SERIAL_ALTERA_UART is not set
@@ -1636,36 +1633,18 @@ CONFIG_SERIAL_CORE_CONSOLE=y
 # CONFIG_SERIAL_RP2 is not set
 # CONFIG_SERIAL_FSL_LPUART is not set
 # CONFIG_SERIAL_FSL_LINFLEXUART is not set
-# CONFIG_SERIAL_SPRD is not set
 # end of Serial drivers
 
-CONFIG_SERIAL_NONSTANDARD=y
-# CONFIG_ROCKETPORT is not set
-# CONFIG_CYCLADES is not set
-# CONFIG_MOXA_INTELLIO is not set
-# CONFIG_MOXA_SMARTIO is not set
-# CONFIG_SYNCLINK is not set
-# CONFIG_SYNCLINKMP is not set
-# CONFIG_SYNCLINK_GT is not set
-# CONFIG_ISI is not set
-# CONFIG_N_HDLC is not set
-# CONFIG_N_GSM is not set
-# CONFIG_NOZOMI is not set
-# CONFIG_NULL_TTY is not set
-# CONFIG_TRACE_SINK is not set
-CONFIG_HVC_DRIVER=y
 # CONFIG_SERIAL_DEV_BUS is not set
 # CONFIG_TTY_PRINTK is not set
+CONFIG_HVC_DRIVER=y
 CONFIG_VIRTIO_CONSOLE=y
 # CONFIG_IPMI_HANDLER is not set
 # CONFIG_HW_RANDOM is not set
+# CONFIG_NVRAM is not set
 # CONFIG_APPLICOM is not set
 # CONFIG_MWAVE is not set
-CONFIG_DEVMEM=y
-CONFIG_DEVKMEM=y
-# CONFIG_NVRAM is not set
 # CONFIG_RAW_DRIVER is not set
-CONFIG_DEVPORT=y
 CONFIG_HPET=y
 # CONFIG_HPET_MMAP is not set
 # CONFIG_HANGCHECK_TIMER is not set
@@ -1678,6 +1657,7 @@ CONFIG_TCG_TIS=y
 CONFIG_TCG_CRB=y
 # CONFIG_TCG_VTPM_PROXY is not set
 # CONFIG_TELCLOCK is not set
+CONFIG_DEVPORT=y
 # CONFIG_XILLYBUS is not set
 # end of Character devices
 
@@ -1733,7 +1713,6 @@ CONFIG_POWER_SUPPLY=y
 # CONFIG_CHARGER_MAX8903 is not set
 # CONFIG_HWMON is not set
 CONFIG_THERMAL=y
-# CONFIG_THERMAL_NETLINK is not set
 # CONFIG_THERMAL_STATISTICS is not set
 CONFIG_THERMAL_EMERGENCY_POWEROFF_DELAY_MS=0
 CONFIG_THERMAL_WRITABLE_TRIPS=y
@@ -1792,7 +1771,6 @@ CONFIG_BCMA_POSSIBLE=y
 
 # CONFIG_REGULATOR is not set
 # CONFIG_RC_CORE is not set
-# CONFIG_MEDIA_CEC_SUPPORT is not set
 # CONFIG_MEDIA_SUPPORT is not set
 
 #
@@ -1814,6 +1792,11 @@ CONFIG_VGA_ARB_MAX_GPUS=16
 #
 # end of ARM devices
 
+#
+# ACP (Audio CoProcessor) Configuration
+#
+# end of ACP (Audio CoProcessor) Configuration
+
 #
 # Frame buffer Devices
 #
@@ -1879,6 +1862,7 @@ CONFIG_FB_VESA=y
 #
 # CONFIG_LCD_CLASS_DEVICE is not set
 CONFIG_BACKLIGHT_CLASS_DEVICE=y
+CONFIG_BACKLIGHT_GENERIC=y
 # CONFIG_BACKLIGHT_APPLE is not set
 # CONFIG_BACKLIGHT_QCOM_WLED is not set
 # CONFIG_BACKLIGHT_SAHARA is not set
@@ -1938,7 +1922,6 @@ CONFIG_HID_DRAGONRISE=y
 CONFIG_HID_EZKEY=y
 # CONFIG_HID_GEMBIRD is not set
 # CONFIG_HID_GFRM is not set
-# CONFIG_HID_GLORIOUS is not set
 # CONFIG_HID_KEYTOUCH is not set
 CONFIG_HID_KYE=y
 # CONFIG_HID_WALTOP is not set
@@ -2018,7 +2001,6 @@ CONFIG_RTC_MC146818_LIB=y
 CONFIG_SYNC_FILE=y
 # CONFIG_SW_SYNC is not set
 # CONFIG_UDMABUF is not set
-# CONFIG_DMABUF_MOVE_NOTIFY is not set
 # CONFIG_DMABUF_SELFTESTS is not set
 # CONFIG_DMABUF_HEAPS is not set
 # end of DMABUF options
@@ -2034,10 +2016,6 @@ CONFIG_VIRTIO_PCI_LEGACY=y
 CONFIG_VIRTIO_BALLOON=y
 # CONFIG_VIRTIO_INPUT is not set
 # CONFIG_VIRTIO_MMIO is not set
-# CONFIG_VDPA is not set
-CONFIG_VHOST_MENU=y
-# CONFIG_VHOST_NET is not set
-# CONFIG_VHOST_CROSS_ENDIAN_LEGACY is not set
 
 #
 # Microsoft Hyper-V guest support
@@ -2051,10 +2029,15 @@ CONFIG_PMC_ATOM=y
 # CONFIG_MFD_CROS_EC is not set
 # CONFIG_CHROME_PLATFORMS is not set
 # CONFIG_MELLANOX_PLATFORM is not set
-CONFIG_HAVE_CLK=y
 CONFIG_CLKDEV_LOOKUP=y
 CONFIG_HAVE_CLK_PREPARE=y
 CONFIG_COMMON_CLK=y
+
+#
+# Common Clock Framework
+#
+# end of Common Clock Framework
+
 # CONFIG_HWSPINLOCK is not set
 
 #
@@ -2248,13 +2231,12 @@ CONFIG_INOTIFY_USER=y
 # end of CD-ROM/DVD Filesystems
 
 #
-# DOS/FAT/EXFAT/NT Filesystems
+# DOS/FAT/NT Filesystems
 #
 # CONFIG_MSDOS_FS is not set
 # CONFIG_VFAT_FS is not set
-# CONFIG_EXFAT_FS is not set
 # CONFIG_NTFS_FS is not set
-# end of DOS/FAT/EXFAT/NT Filesystems
+# end of DOS/FAT/NT Filesystems
 
 #
 # Pseudo filesystems
@@ -2270,7 +2252,6 @@ CONFIG_SYSFS=y
 CONFIG_TMPFS=y
 CONFIG_TMPFS_POSIX_ACL=y
 CONFIG_TMPFS_XATTR=y
-# CONFIG_TMPFS_INODE64 is not set
 CONFIG_HUGETLBFS=y
 CONFIG_HUGETLB_PAGE=y
 CONFIG_MEMFD_CREATE=y
@@ -2351,6 +2332,7 @@ CONFIG_IO_WQ=y
 CONFIG_KEYS=y
 # CONFIG_KEYS_REQUEST_CACHE is not set
 # CONFIG_PERSISTENT_KEYRINGS is not set
+# CONFIG_BIG_KEYS is not set
 # CONFIG_TRUSTED_KEYS is not set
 # CONFIG_ENCRYPTED_KEYS is not set
 # CONFIG_KEY_DH_OPERATIONS is not set
@@ -2361,19 +2343,10 @@ CONFIG_SECURITY_NETWORK=y
 CONFIG_PAGE_TABLE_ISOLATION=y
 # CONFIG_SECURITY_NETWORK_XFRM is not set
 # CONFIG_SECURITY_PATH is not set
-CONFIG_LSM_MMAP_MIN_ADDR=65536
 CONFIG_HAVE_HARDENED_USERCOPY_ALLOCATOR=y
 # CONFIG_HARDENED_USERCOPY is not set
 # CONFIG_FORTIFY_SOURCE is not set
 # CONFIG_STATIC_USERMODEHELPER is not set
-CONFIG_SECURITY_SELINUX=y
-# CONFIG_SECURITY_SELINUX_BOOTPARAM is not set
-# CONFIG_SECURITY_SELINUX_DISABLE is not set
-CONFIG_SECURITY_SELINUX_DEVELOP=y
-CONFIG_SECURITY_SELINUX_AVC_STATS=y
-CONFIG_SECURITY_SELINUX_CHECKREQPROT_VALUE=0
-CONFIG_SECURITY_SELINUX_SIDTAB_HASH_BITS=9
-CONFIG_SECURITY_SELINUX_SID2STR_CACHE_SIZE=256
 # CONFIG_SECURITY_SMACK is not set
 # CONFIG_SECURITY_TOMOYO is not set
 # CONFIG_SECURITY_APPARMOR is not set
@@ -2383,10 +2356,8 @@ CONFIG_SECURITY_SELINUX_SID2STR_CACHE_SIZE=256
 # CONFIG_SECURITY_LOCKDOWN_LSM is not set
 CONFIG_INTEGRITY=y
 # CONFIG_INTEGRITY_SIGNATURE is not set
-CONFIG_INTEGRITY_AUDIT=y
 CONFIG_IMA=y
 CONFIG_IMA_MEASURE_PCR_IDX=10
-CONFIG_IMA_LSM_RULES=y
 # CONFIG_IMA_TEMPLATE is not set
 CONFIG_IMA_NG_TEMPLATE=y
 # CONFIG_IMA_SIG_TEMPLATE is not set
@@ -2394,16 +2365,17 @@ CONFIG_IMA_DEFAULT_TEMPLATE="ima-ng"
 CONFIG_IMA_DEFAULT_HASH_SHA1=y
 # CONFIG_IMA_DEFAULT_HASH_SHA256 is not set
 CONFIG_IMA_DEFAULT_HASH="sha1"
-CONFIG_IMA_WRITE_POLICY=y
-CONFIG_IMA_READ_POLICY=y
+# CONFIG_IMA_WRITE_POLICY is not set
+# CONFIG_IMA_READ_POLICY is not set
 # CONFIG_IMA_APPRAISE is not set
 CONFIG_IMA_MEASURE_ASYMMETRIC_KEYS=y
 CONFIG_IMA_QUEUE_EARLY_BOOT_KEYS=y
-# CONFIG_IMA_SECURE_AND_OR_TRUSTED_BOOT is not set
 # CONFIG_EVM is not set
-# CONFIG_DEFAULT_SECURITY_SELINUX is not set
 CONFIG_DEFAULT_SECURITY_DAC=y
-CONFIG_LSM="selinux,bpf,integrity"
+CONFIG_LSM="selinux,bpf"
+CONFIG_BPF_LSM=y
+CONFIG_AUDIT=y
+CONFIG_SECURITY_SELINUX=y
 
 #
 # Kernel hardening options
@@ -2651,13 +2623,11 @@ CONFIG_GENERIC_STRNLEN_USER=y
 CONFIG_GENERIC_NET_UTILS=y
 CONFIG_GENERIC_FIND_FIRST_BIT=y
 # CONFIG_CORDIC is not set
-# CONFIG_PRIME_NUMBERS is not set
 CONFIG_RATIONAL=y
 CONFIG_GENERIC_PCI_IOMAP=y
 CONFIG_GENERIC_IOMAP=y
 CONFIG_ARCH_USE_CMPXCHG_LOCKREF=y
 CONFIG_ARCH_HAS_FAST_MULTIPLIER=y
-CONFIG_ARCH_USE_SYM_ANNOTATIONS=y
 CONFIG_CRC_CCITT=y
 CONFIG_CRC16=y
 CONFIG_CRC_T10DIF=y
@@ -2678,7 +2648,6 @@ CONFIG_XXHASH=y
 CONFIG_ZLIB_INFLATE=y
 CONFIG_LZO_DECOMPRESS=y
 CONFIG_LZ4_DECOMPRESS=y
-CONFIG_ZSTD_DECOMPRESS=y
 CONFIG_XZ_DEC=y
 CONFIG_XZ_DEC_X86=y
 # CONFIG_XZ_DEC_POWERPC is not set
@@ -2694,14 +2663,12 @@ CONFIG_DECOMPRESS_LZMA=y
 CONFIG_DECOMPRESS_XZ=y
 CONFIG_DECOMPRESS_LZO=y
 CONFIG_DECOMPRESS_LZ4=y
-CONFIG_DECOMPRESS_ZSTD=y
 CONFIG_GENERIC_ALLOCATOR=y
 CONFIG_XARRAY_MULTI=y
 CONFIG_ASSOCIATIVE_ARRAY=y
 CONFIG_HAS_IOMEM=y
 CONFIG_HAS_IOPORT_MAP=y
 CONFIG_HAS_DMA=y
-CONFIG_DMA_OPS=y
 CONFIG_NEED_SG_DMA_LENGTH=y
 CONFIG_NEED_DMA_MAP_STATE=y
 CONFIG_ARCH_DMA_ADDR_T_64BIT=y
@@ -2769,7 +2736,6 @@ CONFIG_CONSOLE_LOGLEVEL_QUIET=4
 CONFIG_MESSAGE_LOGLEVEL_DEFAULT=4
 # CONFIG_BOOT_PRINTK_DELAY is not set
 # CONFIG_DYNAMIC_DEBUG is not set
-# CONFIG_DYNAMIC_DEBUG_CORE is not set
 CONFIG_SYMBOLIC_ERRNAME=y
 CONFIG_DEBUG_BUGVERBOSE=y
 # end of printk and dmesg options
@@ -2779,7 +2745,6 @@ CONFIG_DEBUG_BUGVERBOSE=y
 #
 CONFIG_DEBUG_INFO=y
 # CONFIG_DEBUG_INFO_REDUCED is not set
-# CONFIG_DEBUG_INFO_COMPRESSED is not set
 # CONFIG_DEBUG_INFO_SPLIT is not set
 # CONFIG_DEBUG_INFO_DWARF4 is not set
 CONFIG_DEBUG_INFO_BTF=y
@@ -2789,9 +2754,9 @@ CONFIG_FRAME_WARN=2048
 # CONFIG_STRIP_ASM_SYMS is not set
 # CONFIG_READABLE_ASM is not set
 # CONFIG_HEADERS_INSTALL is not set
+CONFIG_OPTIMIZE_INLINING=y
 # CONFIG_DEBUG_SECTION_MISMATCH is not set
 CONFIG_SECTION_MISMATCH_WARN_ONLY=y
-# CONFIG_DEBUG_FORCE_FUNCTION_ALIGN_32B is not set
 CONFIG_STACK_VALIDATION=y
 # CONFIG_DEBUG_FORCE_WEAK_PER_CPU is not set
 # end of Compile-time checks and compiler options
@@ -2802,15 +2767,12 @@ CONFIG_STACK_VALIDATION=y
 CONFIG_MAGIC_SYSRQ=y
 CONFIG_MAGIC_SYSRQ_DEFAULT_ENABLE=0x1
 CONFIG_MAGIC_SYSRQ_SERIAL=y
-CONFIG_MAGIC_SYSRQ_SERIAL_SEQUENCE=""
 CONFIG_DEBUG_FS=y
-CONFIG_DEBUG_FS_ALLOW_ALL=y
-# CONFIG_DEBUG_FS_DISALLOW_MOUNT is not set
-# CONFIG_DEBUG_FS_ALLOW_NONE is not set
 CONFIG_HAVE_ARCH_KGDB=y
 # CONFIG_KGDB is not set
 CONFIG_ARCH_HAS_UBSAN_SANITIZE_ALL=y
 # CONFIG_UBSAN is not set
+CONFIG_UBSAN_ALIGNMENT=y
 # end of Generic Kernel Debugging Instruments
 
 CONFIG_DEBUG_KERNEL=y
@@ -2825,8 +2787,6 @@ CONFIG_DEBUG_MISC=y
 # CONFIG_PAGE_POISONING is not set
 # CONFIG_DEBUG_PAGE_REF is not set
 # CONFIG_DEBUG_RODATA_TEST is not set
-CONFIG_ARCH_HAS_DEBUG_WX=y
-# CONFIG_DEBUG_WX is not set
 CONFIG_GENERIC_PTDUMP=y
 # CONFIG_PTDUMP_DEBUGFS is not set
 # CONFIG_DEBUG_OBJECTS is not set
@@ -2836,16 +2796,14 @@ CONFIG_HAVE_DEBUG_KMEMLEAK=y
 # CONFIG_DEBUG_KMEMLEAK is not set
 # CONFIG_DEBUG_STACK_USAGE is not set
 CONFIG_SCHED_STACK_END_CHECK=y
-CONFIG_ARCH_HAS_DEBUG_VM_PGTABLE=y
 # CONFIG_DEBUG_VM is not set
-# CONFIG_DEBUG_VM_PGTABLE is not set
 CONFIG_ARCH_HAS_DEBUG_VIRTUAL=y
 # CONFIG_DEBUG_VIRTUAL is not set
 CONFIG_DEBUG_MEMORY_INIT=y
 # CONFIG_DEBUG_PER_CPU_MAPS is not set
 CONFIG_HAVE_ARCH_KASAN=y
 CONFIG_HAVE_ARCH_KASAN_VMALLOC=y
-CONFIG_CC_HAS_KASAN_GENERIC=y
+CONFIG_KASAN_STACK=1
 # end of Memory Debugging
 
 # CONFIG_DEBUG_SHIRQ is not set
@@ -2870,7 +2828,6 @@ CONFIG_DEFAULT_HUNG_TASK_TIMEOUT=120
 # CONFIG_BOOTPARAM_HUNG_TASK_PANIC is not set
 CONFIG_BOOTPARAM_HUNG_TASK_PANIC_VALUE=0
 # CONFIG_WQ_WATCHDOG is not set
-# CONFIG_TEST_LOCKUP is not set
 # end of Debug Oops, Lockups and Hangs
 
 #
@@ -2889,7 +2846,6 @@ CONFIG_DEBUG_PREEMPT=y
 #
 CONFIG_LOCK_DEBUGGING_SUPPORT=y
 CONFIG_PROVE_LOCKING=y
-# CONFIG_PROVE_RAW_LOCK_NESTING is not set
 # CONFIG_LOCK_STAT is not set
 CONFIG_DEBUG_RT_MUTEXES=y
 CONFIG_DEBUG_SPINLOCK=y
@@ -2906,7 +2862,6 @@ CONFIG_DEBUG_ATOMIC_SLEEP=y
 # end of Lock Debugging (spinlocks, mutexes, etc...)
 
 CONFIG_TRACE_IRQFLAGS=y
-CONFIG_TRACE_IRQFLAGS_NMI=y
 CONFIG_STACKTRACE=y
 # CONFIG_WARN_ALL_UNSEEDED_RANDOM is not set
 # CONFIG_DEBUG_KOBJECT is not set
@@ -2929,7 +2884,6 @@ CONFIG_DEBUG_CREDENTIALS=y
 CONFIG_PROVE_RCU=y
 # CONFIG_RCU_PERF_TEST is not set
 # CONFIG_RCU_TORTURE_TEST is not set
-# CONFIG_RCU_REF_SCALE_TEST is not set
 CONFIG_RCU_CPU_STALL_TIMEOUT=60
 # CONFIG_RCU_TRACE is not set
 # CONFIG_RCU_EQS_DEBUG is not set
@@ -2967,6 +2921,7 @@ CONFIG_DYNAMIC_FTRACE_WITH_REGS=y
 CONFIG_DYNAMIC_FTRACE_WITH_DIRECT_CALLS=y
 # CONFIG_FUNCTION_PROFILER is not set
 # CONFIG_STACK_TRACER is not set
+# CONFIG_PREEMPTIRQ_EVENTS is not set
 # CONFIG_IRQSOFF_TRACER is not set
 # CONFIG_PREEMPT_TRACER is not set
 # CONFIG_SCHED_TRACER is not set
@@ -2986,7 +2941,6 @@ CONFIG_DYNAMIC_EVENTS=y
 CONFIG_PROBE_EVENTS=y
 CONFIG_BPF_KPROBE_OVERRIDE=y
 CONFIG_FTRACE_MCOUNT_RECORD=y
-# CONFIG_SYNTH_EVENTS is not set
 # CONFIG_HIST_TRIGGERS is not set
 # CONFIG_TRACE_EVENT_INJECT is not set
 # CONFIG_TRACEPOINT_BENCHMARK is not set
@@ -2998,7 +2952,6 @@ CONFIG_FTRACE_MCOUNT_RECORD=y
 # CONFIG_KPROBE_EVENT_GEN_TEST is not set
 # CONFIG_PROVIDE_OHCI1394_DMA_INIT is not set
 # CONFIG_SAMPLES is not set
-CONFIG_HAVE_ARCH_KCSAN=y
 CONFIG_ARCH_HAS_DEVMEM_IS_ALLOWED=y
 # CONFIG_STRICT_DEVMEM is not set
 
@@ -3006,12 +2959,13 @@ CONFIG_ARCH_HAS_DEVMEM_IS_ALLOWED=y
 # x86 Debugging
 #
 CONFIG_TRACE_IRQFLAGS_SUPPORT=y
-CONFIG_TRACE_IRQFLAGS_NMI_SUPPORT=y
 CONFIG_X86_VERBOSE_BOOTUP=y
 CONFIG_EARLY_PRINTK=y
 # CONFIG_EARLY_PRINTK_DBGP is not set
 # CONFIG_EARLY_PRINTK_USB_XDBC is not set
 # CONFIG_EFI_PGT_DUMP is not set
+# CONFIG_DEBUG_WX is not set
+CONFIG_DOUBLEFAULT=y
 # CONFIG_DEBUG_TLBFLUSH is not set
 # CONFIG_IOMMU_DEBUG is not set
 CONFIG_HAVE_MMIOTRACE_SUPPORT=y
@@ -3038,16 +2992,9 @@ CONFIG_UNWINDER_ORC=y
 # CONFIG_NOTIFIER_ERROR_INJECTION is not set
 CONFIG_FUNCTION_ERROR_INJECTION=y
 CONFIG_FAULT_INJECTION=y
-# CONFIG_FAILSLAB is not set
-# CONFIG_FAIL_PAGE_ALLOC is not set
-# CONFIG_FAIL_MAKE_REQUEST is not set
-# CONFIG_FAIL_IO_TIMEOUT is not set
-# CONFIG_FAIL_FUTEX is not set
 CONFIG_FAULT_INJECTION_DEBUG_FS=y
 CONFIG_FAIL_FUNCTION=y
 CONFIG_ARCH_HAS_KCOV=y
-CONFIG_CC_HAS_SANCOV_TRACE_PC=y
-# CONFIG_KCOV is not set
 # CONFIG_RUNTIME_TESTING_MENU is not set
 # CONFIG_MEMTEST is not set
 # end of Kernel Testing and Coverage

travis-ci/vmtest/configs/whitelist/WHITELIST-4.9.0

@@ -1,7 +0,0 @@
-# btf_dump -- need to disable data dump sub-tests
-core_retro
-cpu_mask
-hashmap
-perf_buffer
-section_names
-

travis-ci/vmtest/configs/whitelist/WHITELIST-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
-fexit_stress
-get_branch_snapshot
-get_stackid_cannot_attach
-global_data
-global_data_init
-global_func_args
-hashmap
-l4lb_all
-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
-subprogs
-task_fd_query_rawtp
-task_fd_query_tp
-tc_bpf
-tcp_estats
-tcp_rtt
-tp_attach_query
-xdp
-xdp_info
-xdp_noinline
-xdp_perf

travis-ci/vmtest/helpers.sh

@@ -1,24 +0,0 @@
-# $1 - start or end
-# $2 - fold identifier, no spaces
-# $3 - fold section description
-travis_fold() {
-  local YELLOW='\033[1;33m'
-  local NOCOLOR='\033[0m'
-  if [ -z ${GITHUB_WORKFLOW+x} ]; then
-    echo travis_fold:$1:$2
-    if [ ! -z "${3:-}" ]; then
-      echo -e "${YELLOW}$3${NOCOLOR}"
-    fi
-    echo
-  else
-    if [ $1 = "start" ]; then
-      line="::group::$2"
-      if [ ! -z "${3:-}" ]; then
-        line="$line - ${YELLOW}$3${NOCOLOR}"
-      fi
-    else
-      line="::endgroup::"
-    fi
-    echo -e "$line"
-  fi
-}

travis-ci/vmtest/mkrootfs.sh

@@ -81,7 +81,6 @@ packages=(
 	binutils
 	elfutils
 	glibc
-	iproute2
 	# selftests test_verifier dependencies.
 	libcap
 )
@@ -102,6 +101,15 @@ rm -rf "$root/usr/share/{doc,help,man,texinfo}"
 
 chroot "${root}" /bin/busybox --install
 
+cat > "$root/etc/fstab" << "EOF"
+dev /dev devtmpfs rw,nosuid 0 0
+proc /proc proc rw,nosuid,nodev,noexec 0 0
+sys /sys sysfs rw,nosuid,nodev,noexec 0 0
+debugfs /sys/kernel/debug debugfs mode=755,realtime 0 0
+bpffs /sys/fs/bpf bpf realtime 0 0
+EOF
+chmod 644 "$root/etc/fstab"
+
 cat > "$root/etc/inittab" << "EOF"
 ::sysinit:/etc/init.d/rcS
 ::ctrlaltdel:/sbin/reboot
@@ -115,29 +123,13 @@ mkdir -m 755 "$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 $(/bin/mount -l -t devtmpfs) ]]; then
-	/bin/mount devtmpfs /dev -t devtmpfs
-fi
-
-/bin/mount sysfs /sys -t sysfs
-/bin/mount bpffs /sys/fs/bpf -t bpf
-/bin/mount debugfs /sys/kernel/debug -t debugfs
-
-echo 'Listing currently mounted file systems'
-/bin/mount
+/bin/mount -a
 EOF
 chmod 755 "$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 "$root/etc/rcS.d/S40-network"
@@ -145,8 +137,6 @@ chmod 755 "$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

travis-ci/vmtest/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

travis-ci/vmtest/prepare_selftests-5.5.0.sh

@@ -1,3 +1,12 @@
 #!/bin/bash
 
-printf "all:\n\ttouch bpf_testmod.ko\n\nclean:\n" > bpf_testmod/Makefile
+set -euxo pipefail
+
+# these tests expect vmlinux.h to have latest defiition of bpf_devmap_val xdp_md->egress_ifindex
+rm progs/test_xdp_with_devmap_helpers.c
+rm progs/test_xdp_devmap_helpers.c
+rm prog_tests/xdp_devmap_attach.c
+
+# no BPF_F_NO_PREALLOC in BTF and no sk_msg_md->sk field
+rm progs/test_skmsg_load_helpers.c
+rm prog_tests/sockmap_basic.c

travis-ci/vmtest/prepare_selftests.sh

@@ -1,21 +1,14 @@
 #!/bin/bash
 
-set -eu
+set -eux
 
-source $(cd $(dirname $0) && pwd)/helpers.sh
+REPO_PATH=$1
 
-REPO_PATH=${1:-}
-
-if [[ ! -z "$REPO_PATH" ]]; then
-	${VMTEST_ROOT}/checkout_latest_kernel.sh ${REPO_PATH}
-	cd ${REPO_PATH}
-fi
+${VMTEST_ROOT}/checkout_latest_kernel.sh ${REPO_PATH}
+cd ${REPO_PATH}
 
 if [[ "${KERNEL}" = 'LATEST' ]]; then
-	travis_fold start build_kernel "Kernel build"
-
 	cp ${VMTEST_ROOT}/configs/latest.config .config
-	make -j $((4*$(nproc))) olddefconfig all >/dev/null
-	travis_fold end build_kernel
+	make -j $((4*$(nproc))) olddefconfig all
 fi
 

travis-ci/vmtest/run.sh

@@ -3,8 +3,6 @@
 set -uo pipefail
 trap 'exit 2' ERR
 
-source $(cd $(dirname $0) && pwd)/helpers.sh
-
 usage () {
 	USAGE_STRING="usage: $0 [-k KERNELRELEASE|-b DIR] [[-r ROOTFSVERSION] [-fo]|-I] [-Si] [-d DIR] IMG
        $0 [-k KERNELRELEASE] -l
@@ -92,12 +90,6 @@ SKIPSOURCE=0
 APPEND=""
 DIR="$PWD"
 LIST=0
-
-# by default will copy all files that aren't listed in git exclusions
-# but it doesn't work for entire kernel tree very well
-# so for full kernel tree you may need to SOURCE_FULLCOPY=0
-SOURCE_FULLCOPY=${SOURCE_FULLCOPY:-1}
-
 while true; do
 	case "$1" in
 		-k|--kernel)
@@ -283,10 +275,6 @@ if [[ $SKIPIMG -eq 0 && ! -v ROOTFSVERSION ]]; then
 fi
 
 echo "Kernel release: $KERNELRELEASE" >&2
-echo
-
-travis_fold start vmlinux_setup "Preparing Linux image"
-
 if (( SKIPIMG )); then
 	echo "Not extracting root filesystem" >&2
 else
@@ -378,40 +366,25 @@ else
 	sudo chmod 644 "$vmlinux"
 fi
 
-travis_fold end vmlinux_setup
-
-REPO_PATH="${SELFTEST_REPO_PATH:-travis-ci/vmtest/bpf-next}"
 LIBBPF_PATH="${REPO_ROOT}" \
+	REPO_PATH="travis-ci/vmtest/bpf-next" \
 	VMTEST_ROOT="${VMTEST_ROOT}" \
-	REPO_PATH="${REPO_PATH}" \
 	VMLINUX_BTF=${vmlinux} ${VMTEST_ROOT}/build_selftests.sh
 
-travis_fold start bpftool_checks "Running bpftool checks..."
-if [[ "${KERNEL}" = 'LATEST' ]]; then
-	"${REPO_ROOT}/${REPO_PATH}/tools/testing/selftests/bpf/test_bpftool_synctypes.py" && \
-		echo "Consistency checks passed successfully."
-else
-	echo "Consistency checks skipped."
-fi
-travis_fold end bpftool_checks
-
-travis_fold start vm_init "Starting virtual machine..."
-
 if (( SKIPSOURCE )); then
 	echo "Not copying source files..." >&2
 else
 	echo "Copying source files..." >&2
+
 	# Copy the source files in.
 	sudo mkdir -p -m 0755 "$mnt/${PROJECT_NAME}"
-	if [[ "${SOURCE_FULLCOPY}" == "1" ]]; then
-		git ls-files -z | sudo rsync --files-from=- -0cpt . "$mnt/${PROJECT_NAME}"
+	{
+	if [[ -e .git ]]; then
+		git ls-files -z
 	else
-		sudo mkdir -p -m 0755 ${mnt}/${PROJECT_NAME}/{selftests,travis-ci}
-		tree --du -shaC "${REPO_ROOT}/selftests/bpf"
-		sudo rsync -avm "${REPO_ROOT}/selftests/bpf" "$mnt/${PROJECT_NAME}/selftests/"
-		sudo rsync -avm "${REPO_ROOT}/travis-ci/vmtest" "$mnt/${PROJECT_NAME}/travis-ci/"
-        fi
-
+		tr '\n' '\0' < "${PROJECT_NAME}.egg-info/SOURCES.txt"
+	fi
+	} | sudo rsync --files-from=- -0cpt . "$mnt/${PROJECT_NAME}"
 fi
 
 setup_script="#!/bin/sh
@@ -428,41 +401,32 @@ if [[ ! -z SETUPCMD ]]; then
 	if [[ -v BUILDDIR ]]; then kernel='latest'; fi
 	setup_envvars="export KERNEL=${kernel}"
 	setup_script=$(printf "#!/bin/sh
-set -eux
+set -e
 
 echo 'Running setup commands'
 %s
-set +e; %s; exitstatus=\$?; set -e
-echo \$exitstatus > /exitstatus
+%s
+echo $? > /exitstatus
 chmod 644 /exitstatus" "${setup_envvars}" "${setup_cmd}")
 fi
 
 echo "${setup_script}" | sudo tee "$mnt/etc/rcS.d/S50-run-tests" > /dev/null
 sudo chmod 755 "$mnt/etc/rcS.d/S50-run-tests"
 
-fold_shutdown="$(travis_fold start shutdown)"
 poweroff_script="#!/bin/sh
 
-echo ${fold_shutdown}
-echo -e '\033[1;33mShutdown\033[0m\n'
-
 poweroff"
 echo "${poweroff_script}" | sudo tee "$mnt/etc/rcS.d/S99-poweroff" > /dev/null
 sudo chmod 755 "$mnt/etc/rcS.d/S99-poweroff"
 
 sudo umount "$mnt"
 
-echo "Starting VM with $(nproc) CPUs..."
+echo "Starting virtual machine..." >&2
+qemu-system-x86_64 -nodefaults -display none -serial mon:stdio \
+	-cpu kvm64 -enable-kvm -smp "$(nproc)" -m 2G \
+	-drive file="$IMG",format=raw,index=1,media=disk,if=virtio,cache=none \
+	-kernel "$vmlinuz" -append "root=/dev/vda rw console=ttyS0,115200$APPEND"
 
-if kvm-ok ; then
-  accel="-cpu kvm64 -enable-kvm"
-else
-  accel="-cpu qemu64 -machine accel=tcg"
-fi
-qemu-system-x86_64 -nodefaults -display none -serial mon:stdio -no-reboot \
-  ${accel} -smp "$(nproc)" -m 4G \
-  -drive file="$IMG",format=raw,index=1,media=disk,if=virtio,cache=none \
-  -kernel "$vmlinuz" -append "root=/dev/vda rw console=ttyS0,115200 kernel.panic=-1 $APPEND"
 sudo mount -o loop "$IMG" "$mnt"
 if exitstatus="$(cat "$mnt/exitstatus" 2>/dev/null)"; then
 	printf '\nTests exit status: %s\n' "$exitstatus" >&2
@@ -471,7 +435,4 @@ else
 	exitstatus=1
 fi
 sudo umount "$mnt"
-
-travis_fold end shutdown
-
 exit "$exitstatus"

travis-ci/vmtest/run_selftests.sh

@@ -1,35 +1,23 @@
 #!/bin/bash
 
-set -euo pipefail
-
-source $(cd $(dirname $0) && pwd)/helpers.sh
+set -euxo pipefail
 
 test_progs() {
-	if [[ "${KERNEL}" != '4.9.0' ]]; then
-		travis_fold start test_progs "Testing test_progs"
-		./test_progs ${BLACKLIST:+-d$BLACKLIST} ${WHITELIST:+-a$WHITELIST}
-		travis_fold end test_progs
-	fi
-
-	travis_fold start test_progs-no_alu32 "Testing test_progs-no_alu32"
-	./test_progs-no_alu32 ${BLACKLIST:+-d$BLACKLIST} ${WHITELIST:+-a$WHITELIST}
-	travis_fold end test_progs-no_alu32
+	echo TEST_PROGS
+	./test_progs ${BLACKLIST:+-b$BLACKLIST} ${WHITELIST:+-t$WHITELIST}
 }
 
 test_maps() {
-	travis_fold start test_maps "Testing test_maps"
+	echo TEST_MAPS
+	# Allow failing on older kernels.
 	./test_maps
-	travis_fold end test_maps
 }
 
 test_verifier() {
-	travis_fold start test_verifier "Testing test_verifier"
+	echo TEST_VERIFIER
 	./test_verifier
-	travis_fold end test_verifier
 }
 
-travis_fold end vm_init
-
 configs_path='libbpf/travis-ci/vmtest/configs'
 blacklist_path="$configs_path/blacklist/BLACKLIST-${KERNEL}"
 if [[ -s "${blacklist_path}" ]]; then
@@ -46,6 +34,6 @@ cd libbpf/selftests/bpf
 test_progs
 
 if [[ "${KERNEL}" == 'latest' ]]; then
-	# test_maps
+	test_maps
 	test_verifier
 fi

travis-ci/vmtest/run_vmtest.sh

@@ -1,39 +1,22 @@
 #!/bin/bash
 
-set -eu
+set -eux
 
-source $(cd $(dirname $0) && pwd)/helpers.sh
-
-VMTEST_SETUPCMD="GITHUB_WORKFLOW=${GITHUB_WORKFLOW:-} PROJECT_NAME=${PROJECT_NAME} ./${PROJECT_NAME}/travis-ci/vmtest/run_selftests.sh"
-
-# if CHECKOUT_KERNEL is 1 code will consider that kernel code lives elsewhere
-# if 0 it will consider that REPO_ROOT is a kernel tree
-CHECKOUT_KERNEL=${CHECKOUT_KERNEL:-1}
+VMTEST_SETUPCMD="PROJECT_NAME=${PROJECT_NAME} ./${PROJECT_NAME}/travis-ci/vmtest/run_selftests.sh"
 
 echo "KERNEL: $KERNEL"
-echo
 
 # Build latest pahole
 ${VMTEST_ROOT}/build_pahole.sh travis-ci/vmtest/pahole
 
-travis_fold start install_clang "Installing Clang/LLVM"
-
+# Install required packages
 wget -O - https://apt.llvm.org/llvm-snapshot.gpg.key | sudo apt-key add -
-sudo add-apt-repository "deb http://apt.llvm.org/focal/ llvm-toolchain-focal main"
-sudo apt-get update
-sudo apt-get install --allow-downgrades -y libc6=2.31-0ubuntu9.2
-sudo aptitude install -y g++ libelf-dev
-sudo aptitude install -y clang-14 lld-14 llvm-14
-
-travis_fold end install_clang
+echo "deb http://apt.llvm.org/bionic/ llvm-toolchain-bionic main" | sudo tee -a /etc/apt/sources.list
+sudo apt-get -qq update
+sudo apt-get -qq -y install clang lld llvm
 
 # Build selftests (and latest kernel, if necessary)
-
-if [[ "$CHECKOUT_KERNEL" == "1" ]]; then
-  ${VMTEST_ROOT}/prepare_selftests.sh travis-ci/vmtest/bpf-next
-else
-  ${VMTEST_ROOT}/prepare_selftests.sh
-fi
+KERNEL="${KERNEL}" ${VMTEST_ROOT}/prepare_selftests.sh travis-ci/vmtest/bpf-next
 
 # Escape whitespace characters.
 setup_cmd=$(sed 's/\([[:space:]]\)/\\\1/g' <<< "${VMTEST_SETUPCMD}")
@@ -41,11 +24,7 @@ setup_cmd=$(sed 's/\([[:space:]]\)/\\\1/g' <<< "${VMTEST_SETUPCMD}")
 sudo adduser "${USER}" kvm
 
 if [[ "${KERNEL}" = 'LATEST' ]]; then
-  if [[ "$CHECKOUT_KERNEL" == "1" ]]; then
-    sudo -E sudo -E -u "${USER}" "${VMTEST_ROOT}/run.sh" -b travis-ci/vmtest/bpf-next -o -d ~ -s "${setup_cmd}" ~/root.img
-  else
-    sudo -E sudo -E -u "${USER}" "${VMTEST_ROOT}/run.sh" -b "${REPO_ROOT}" -o -d ~ -s "${setup_cmd}" ~/root.img
-  fi
+  sudo -E sudo -E -u "${USER}" "${VMTEST_ROOT}/run.sh" -b travis-ci/vmtest/bpf-next -o -d ~ -s "${setup_cmd}" ~/root.img;
 else
-  sudo -E sudo -E -u "${USER}" "${VMTEST_ROOT}/run.sh" -k "${KERNEL}*" -o -d ~ -s "${setup_cmd}" ~/root.img
+  sudo -E sudo -E -u "${USER}" "${VMTEST_ROOT}/run.sh" -k "${KERNEL}*" -o -d ~ -s "${setup_cmd}" ~/root.img;
 fi