Documentation/networking/seg6-sysctl.rst

Source file repositories/reference/linux-study-clean/Documentation/networking/seg6-sysctl.rst

File Facts

System: Linux kernel
Corpus path: Documentation/networking/seg6-sysctl.rst
Extension: .rst
Size: 1183 bytes
Lines: 43
Domain: Support Tooling And Documentation
Bucket: Documentation
Inferred role: Support Tooling And Documentation: documentation
Status: atlas-only

Why This File Exists

Repository support layer: documentation, build tooling, samples, user-space helper tools, generated initramfs support, licenses, and validation utilities.

Repository support layer: documentation, build tooling, samples, user-space helper tools, generated initramfs support, licenses, and validation utilities.

Dependency Surface

No C-style include directives detected by the generator.

Detected Declarations

No top-level syscall, struct, function, initcall, or export declaration detected by the generator.

Annotated Snippet

.. SPDX-License-Identifier: GPL-2.0

====================
Seg6 Sysfs variables
====================


/proc/sys/net/conf/<iface>/seg6_* variables:
============================================

seg6_enabled - BOOL
	Accept or drop SR-enabled IPv6 packets on this interface.

	Relevant packets are those with SRH present and DA = local.

	* 0 - disabled (default)
	* not 0 - enabled

seg6_require_hmac - INTEGER
	Define HMAC policy for ingress SR-enabled packets on this interface.

	* -1 - Ignore HMAC field
	* 0 - Accept SR packets without HMAC, validate SR packets with HMAC
	* 1 - Drop SR packets without HMAC, validate SR packets with HMAC

	Default is 0.

/proc/sys/net/ipv6/seg6_* variables:
====================================

seg6_flowlabel - INTEGER
	Controls the behaviour of computing the flowlabel of outer
	IPv6 header in case of SR T.encaps

	 == =======================================================
	 -1  set flowlabel to zero.
	  0  copy flowlabel from Inner packet in case of Inner IPv6
	     (Set flowlabel to 0 in case IPv4/L2)
	  1  Compute the flowlabel using seg6_make_flowlabel()
	 == =======================================================

	Default is 0.

Annotation

Atlas domain: Support Tooling And Documentation / Documentation.
Implementation status: atlas-only.

Implementation Notes

This generated page is the file-by-file coverage layer; curated subsystem chapters should link here when they synthesize a multi-file control flow.
Core OS pages should be promoted from atlas-only to deep-reviewed when they explain data structures, invariants, locking, lifecycle, and C implementation snippets.
Driver-family pages are intentionally pattern-oriented unless they are part of the selected PCIe/NVMe representative device path.