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.. SPDX-License-Identifier: BSD-3-Clause
Copyright(c) 2018 Intel Corporation.
Berkeley Packet Filter Library
==============================
The DPDK provides an BPF library that gives the ability
to load and execute Enhanced Berkeley Packet Filter (eBPF) bytecode within
user-space dpdk application.
It supports basic set of features from eBPF spec.
Please refer to the
`eBPF spec <https://www.kernel.org/doc/Documentation/networking/filter.txt>`
for more information.
Also it introduces basic framework to load/unload BPF-based filters
on eth devices (right now only via SW RX/TX callbacks).
The library API provides the following basic operations:
* Create a new BPF execution context and load user provided eBPF code into it.
* Destroy an BPF execution context and its runtime structures and free the associated memory.
* Execute eBPF bytecode associated with provided input parameter.
* Provide information about natively compiled code for given BPF context.
* Load BPF program from the ELF file and install callback to execute it on given ethdev port/queue.
Not currently supported eBPF features
-------------------------------------
- JIT for non X86_64 platforms
- cBPF
- tail-pointer call
- eBPF MAP
- skb
- external function calls for 32-bit platforms
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