76d5bb6a13
Extend continuous integration tests by adding testing against various kernel versions. The code is based on vmtest CI scripts implemented by osandov@ for drgn [1] with the following modifications: - The downloadables are stored in Amazon S3 cloud indexed in [2] - `--setup-cmd` command line option is added to vmtest/run.sh so setup commands run on VM boot can be set in e.g. `.travis.yml` - Travis build matrix [2] is introduced for VM tests so VM tests are followed by the existing CI tests. The matrix has `KERNEL` and `VMTEST_SETUPCMD` dimensions. - Minor style fixes. The vmtest extention code is located in travis-ci/vmtest and contains `run.sh` and `setup_example.sh` - `run.sh` is responsible for the vmtest workflow: downloading vmlinux and rootfs image from the cloud, fs mounting, syncing libbpf sources to the image, setting up scripts run on VM boot, starting VM using QEMU. `run.sh` covers more use cases than a script for a job run in TravisCI, e.g. int can build a kernel w/ `--build` option. - `setup_example.sh` is an example of a script run in VM which can be modified to e.g. run actual libbpf tests. A setup script should have executable permission. To set up a new kernel version for a test: 1) upload vmlinuz.* and vmlinux.*\.zst to Amazon S3 store located at [4]; 2) modify INDEX [2] file. [1] https://github.com/osandov/drgn [2] https://libbpf-vmtest.s3-us-west-1.amazonaws.com/x86_64/INDEX [3] https://docs.travis-ci.com/user/build-matrix [4] https://libbpf-vmtest.s3-us-west-1.amazonaws.com/
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
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