Bug 1780124
Summary: | eBPF: supported components [to be repeated in each version and updated with the support status] | ||
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Product: | Red Hat Enterprise Linux 8 | Reporter: | Jaroslav Klech <jklech> |
Component: | doc-Release_Notes-8-en-US | Assignee: | Lucie Vařáková <lmanasko> |
Status: | CLOSED CURRENTRELEASE | QA Contact: | RHEL DPM <rhel-docs> |
Severity: | unspecified | Docs Contact: | Jaroslav Klech <jklech> |
Priority: | medium | ||
Version: | 8.2 | CC: | jbenc, jmarchan, jolsa, lkuprova, lmanasko, pasik, rhel-docs, skozina, skurup, thoiland |
Target Milestone: | rc | Keywords: | Documentation |
Target Release: | 8.4 | ||
Hardware: | Unspecified | ||
OS: | Unspecified | ||
Whiteboard: | |||
Fixed In Version: | Doc Type: | Enhancement | |
Doc Text: |
.Extended Berkeley Packet Filter for RHEL 8.6
The *Extended Berkeley Packet Filter (eBPF)* is an in-kernel virtual machine that allows code execution in the kernel space, in the restricted sandbox environment with access to a limited set of functions. The virtual machine executes a special assembly-like code.
The *eBPF* bytecode first loads to the kernel, followed by
its verification, code translation to the native machine code with just-in-time compilation, and then the virtual machine executes the code.
Red Hat ships numerous components that utilize the *eBPF* virtual machine. Each component is in a different development phase, and thus not all components are currently fully supported. In RHEL 8.6, the following *eBPF* components are supported:
* The *BPF Compiler Collection (BCC)* tools package, which provides tools for I/O analysis, networking, and monitoring of Linux operating systems using *eBPF*.
* The *BCC* library which allows the development of tools similar to those provided in the *BCC* tools package.
* The *eBPF for Traffic Control (tc)* feature, which enables programmable packet processing inside the kernel network data path.
* The `bpftrace` tracing language
* The *eXpress Data Path (XDP)* feature, which provides access to received packets before the kernel networking stack processes them, is supported under specific conditions. For more information see, link:https://access.redhat.com/documentation/en-us/red_hat_enterprise_linux/8/html-single/8.4_release_notes/index#BZ-1952421[XDP is conditionally supported] and link:https://access.redhat.com/documentation/en-us/red_hat_enterprise_linux/8/html-single/configuring_and_managing_networking/index#ref_overview-of-networking-ebpf-features-in-rhel_assembly_understanding-the-ebpf-features-in-rhel[Overview of networking eBPF features in RHEL].
* The `libbpf` package, which is crucial for bpf related applications like `bpftrace` and `bpf/xdp` development.
* The `xdp-tools` package, which contains userspace support utilities for the *XDP* feature, is now supported on the AMD and Intel 64-bit architectures. This includes the `libxdp` library, the `xdp-loader` utility for loading XDP programs, the `xdp-filter` example program for packet filtering, and the `xdpdump` utility for capturing packets from a network interface with XDP enabled.
Note that all other *eBPF* components are available as Technology Preview, unless a specific component is indicated as supported.
The following notable *eBPF* components are currently available as Technology Preview:
* The `AF_XDP` socket for connecting the *eXpress Data Path (XDP)* path to user space
For more information regarding the Technology Preview components, see xref:BZ-1559616[].
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Story Points: | --- |
Clone Of: | Environment: | ||
Last Closed: | 2020-01-24 11:44:45 UTC | Type: | Enhancement |
Regression: | --- | Mount Type: | --- |
Documentation: | --- | CRM: | |
Verified Versions: | Category: | --- | |
oVirt Team: | --- | RHEL 7.3 requirements from Atomic Host: | |
Cloudforms Team: | --- | Target Upstream Version: | |
Embargoed: |