This patchset adds support for SRv6 Headend behavior with Reduced
Encapsulation. It introduces the H.Encaps.Red and H.L2Encaps.Red versions
of the SRv6 H.Encaps and H.L2Encaps behaviors, according to RFC 8986 [1].

In details, the patchset is made of:
 - patch 1/4: add support for SRv6 H.Encaps.Red behavior;
 - Patch 2/4: add support for SRv6 H.L2Encaps.Red behavior;
 - patch 2/4: add selftest for SRv6 H.Encaps.Red behavior;
 - patch 3/4: add selftest for SRv6 H.L2Encaps.Red behavior.

The corresponding iproute2 patch for supporting SRv6 H.Encaps.Red and
H.L2Encaps.Red behaviors is provided in a separated patchset.

[1] - https://datatracker.ietf.org/doc/html/rfc8986

V4 -> v5:
 - Fix skb checksum for SRH Reduced encapsulation/insertion;

 - Improve selftests by: 
      i) adding a random suffix to network namespaces;
     ii) creating net devices directly into network namespaces;
    iii) using trap EXIT command to properly clean up selftest networks.

 Thanks to Paolo Abeni.

v3 -> v4:
 - Add selftests to the Makefile, thanks to Jakub Kicinski.

v2 -> v3:
 - Keep SRH when HMAC TLV is present;

 - Split the support for H.Encaps.Red and H.L2Encaps.Red behaviors in two
   patches (respectively, patch 1/4 and patch 2/4);

 - Add selftests for SRv6 H.Encaps.Red and H.L2Encaps.Red.

v1 -> v2:
 - Fixed sparse warnings;

 - memset now uses sizeof() instead of hardcoded value;

 - Removed EXPORT_SYMBOL_GPL.

Andrea Mayer (4):
  seg6: add support for SRv6 H.Encaps.Red behavior
  seg6: add support for SRv6 H.L2Encaps.Red behavior
  selftests: seg6: add selftest for SRv6 H.Encaps.Red behavior
  selftests: seg6: add selftest for SRv6 H.L2Encaps.Red behavior

 include/uapi/linux/seg6_iptunnel.h            |   2 +
 net/ipv6/seg6_iptunnel.c                      | 140 ++-
 tools/testing/selftests/net/Makefile          |   2 +
 .../net/srv6_hencap_red_l3vpn_test.sh         | 879 ++++++++++++++++++
 .../net/srv6_hl2encap_red_l2vpn_test.sh       | 821 ++++++++++++++++
 5 files changed, 1842 insertions(+), 2 deletions(-)
 create mode 100755 tools/testing/selftests/net/srv6_hencap_red_l3vpn_test.sh
 create mode 100755 tools/testing/selftests/net/srv6_hl2encap_red_l2vpn_test.sh

-- 
2.20.1

Hello:

This series was applied to netdev/net-next.git (master)
by David S. Miller <davem@davemloft.net>:

On Wed, 27 Jul 2022 20:54:04 +0200 you wrote:
> This patchset adds support for SRv6 Headend behavior with Reduced
> Encapsulation. It introduces the H.Encaps.Red and H.L2Encaps.Red versions
> of the SRv6 H.Encaps and H.L2Encaps behaviors, according to RFC 8986 [1].
> 
> In details, the patchset is made of:
>  - patch 1/4: add support for SRv6 H.Encaps.Red behavior;
>  - Patch 2/4: add support for SRv6 H.L2Encaps.Red behavior;
>  - patch 2/4: add selftest for SRv6 H.Encaps.Red behavior;
>  - patch 3/4: add selftest for SRv6 H.L2Encaps.Red behavior.
> 
> [...]

Here is the summary with links:
  - [net-next,v5,1/4] seg6: add support for SRv6 H.Encaps.Red behavior
    https://git.kernel.org/netdev/net-next/c/b07c8cdbe918
  - [net-next,v5,2/4] seg6: add support for SRv6 H.L2Encaps.Red behavior
    https://git.kernel.org/netdev/net-next/c/13f0296be8ec
  - [net-next,v5,3/4] selftests: seg6: add selftest for SRv6 H.Encaps.Red behavior
    https://git.kernel.org/netdev/net-next/c/6ab4eb5a52a7
  - [net-next,v5,4/4] selftests: seg6: add selftest for SRv6 H.L2Encaps.Red behavior
    https://git.kernel.org/netdev/net-next/c/95baa4e8fe69

You are awesome, thank you!
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