033ad7ee78
Syncing latest libbpf commits from kernel repository.
Baseline bpf-next commit: 20f21d98cf12b8ecd69e8defc93fae9e3b353b13
Checkpoint bpf-next commit: a6ed02cac690b635dbb938690e795812ce1e14ca
Baseline bpf commit: 1712b2fff8c682d145c7889d2290696647d82dab
Checkpoint bpf commit: 1712b2fff8c682d145c7889d2290696647d82dab
Andrii Nakryiko (3):
libbpf: Fix error handling bug in btf_dump__new
libbpf: Simplify BTF initialization logic
libbpf: Fix potential multiplication overflow in mmap() size
calculation
KP Singh (1):
libbpf: Load btf_vmlinux only once per object.
src/btf_dump.c | 1 +
src/libbpf.c | 174 ++++++++++++++++++++++++++++++-------------------
2 files changed, 109 insertions(+), 66 deletions(-)
--
2.17.1
|
||
|---|---|---|
| include | ||
| scripts | ||
| src | ||
| travis-ci | ||
| .lgtm.yml | ||
| .travis.yml | ||
| BPF-CHECKPOINT-COMMIT | ||
| CHECKPOINT-COMMIT | ||
| LICENSE | ||
| LICENSE.BSD-2-Clause | ||
| LICENSE.LPGL-2.1 | ||
| 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.hinclude/uapi/linux/bpf.h<->bpf-next/tools/include/uapi/linux/bpf.hinclude/uapi/linux/btf.h<->bpf-next/tools/include/uapi/linux/btf.hinclude/uapi/linux/if_link.h<->bpf-next/tools/include/uapi/linux/if_link.hinclude/uapi/linux/if_xdp.h<->bpf-next/tools/include/uapi/linux/if_xdp.hinclude/uapi/linux/netlink.h<->bpf-next/tools/include/uapi/linux/netlink.hinclude/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
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