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android / platform / external / libbpf / 080fd68
commit080fd68e9c220f3fa119be9a64ab33f0c7f6f3fe[log] [tgz]
authorAndrii Nakryiko <andriin@fb.com>Thu Jan 16 10:13:01 2020 -0800
committerAndrii Nakryiko <andrii.nakryiko@gmail.com>Thu Jan 16 10:38:48 2020 -0800
tree715d27f0360a274d15f47368012e698c640b8bb6
parent437f57042c5d21eeb0bb2e907574e21127e2bc5c [diff]
sync: latest libbpf changes from kernel

Syncing latest libbpf commits from kernel repository.
Baseline bpf-next commit:   1d1a3bcffe360a56fd8cc287ed74d4c3066daf42
Checkpoint bpf-next commit: 858e284f0ec18bff2620d9a6afe764dc683f8ba1
Baseline bpf commit:        e7a5f1f1cd0008e5ad379270a8657e121eedb669
Checkpoint bpf commit:      1712b2fff8c682d145c7889d2290696647d82dab

Andrii Nakryiko (2):
  tools: Sync uapi/linux/if_link.h
  libbpf: Support .text sub-calls relocations

Brian Vazquez (1):
  libbpf: Fix unneeded extra initialization in bpf_map_batch_common

Martin KaFai Lau (1):
  libbpf: Expose bpf_find_kernel_btf as a LIBBPF_API

Yonghong Song (3):
  bpf: Add bpf_send_signal_thread() helper
  tools/bpf: Sync uapi header bpf.h
  libbpf: Add libbpf support to batch ops

 include/uapi/linux/bpf.h     |  40 +++++++++++-
 include/uapi/linux/if_link.h |   1 +
 src/bpf.c                    |  58 +++++++++++++++++
 src/bpf.h                    |  22 +++++++
 src/btf.c                    | 102 +++++++++++++++++++++++++++--
 src/btf.h                    |   2 +
 src/libbpf.c                 | 122 +++++++----------------------------
 src/libbpf.map               |   5 ++
 8 files changed, 247 insertions(+), 105 deletions(-)

--
2.17.1
2 files changed
tree: 715d27f0360a274d15f47368012e698c640b8bb6
  1. include/
  2. scripts/
  3. src/
  4. travis-ci/
  5. .lgtm.yml
  6. .travis.yml
  7. BPF-CHECKPOINT-COMMIT
  8. CHECKPOINT-COMMIT
  9. LICENSE
  10. LICENSE.BSD-2-Clause
  11. LICENSE.LPGL-2.1
  12. README.md
README.md

This is a mirror of bpf-next linux tree's tools/lib/bpf directory plus its supporting header files.

The following files will by sync'ed with bpf-next repo:

  • src/ <-> bpf-next/tools/lib/bpf/
  • include/uapi/linux/bpf_common.h <-> bpf-next/tools/include/uapi/linux/bpf_common.h
  • include/uapi/linux/bpf.h <-> bpf-next/tools/include/uapi/linux/bpf.h
  • include/uapi/linux/btf.h <-> bpf-next/tools/include/uapi/linux/btf.h
  • include/uapi/linux/if_link.h <-> bpf-next/tools/include/uapi/linux/if_link.h
  • include/uapi/linux/if_xdp.h <-> bpf-next/tools/include/uapi/linux/if_xdp.h
  • include/uapi/linux/netlink.h <-> bpf-next/tools/include/uapi/linux/netlink.h
  • include/tools/libc_compat.h <-> bpf-next/tools/include/tools/libc_compat.h

Other header files at this repo (include/linux/*.h) are reduced versions of their counterpart files at bpf-next's tools/include/linux/*.h to make compilation successful.

Build Build Status Total alerts Coverity

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.

To build both static libbpf.a and shared libbpf.so:

$ 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/:

$ 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/:

$ cd src
$ PKG_CONFIG_PATH=/build/root/lib64/pkgconfig DESTDIR=/build/root make install

Distributions

Distributions packaging libbpf from this mirror:

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.
  • Static code analysis via LGTM and Coverity.

Package dependencies of libbpf, package names may vary across distros:

  • zlib
  • libelf

License

This work is dual-licensed under BSD 2-clause license and GNU LGPL v2.1 license. You can choose between one of them if you use this work.

SPDX-License-Identifier: BSD-2-Clause OR LGPL-2.1