netdev - [bpf-next PATCH v2 0/2] Add skb_adjust_room() for SK

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Date:   Thu, 01 Oct 2020 18:09:34 -0700
From:   John Fastabend <john.fastabend@...il.com>
To:     ast@...nel.org, daniel@...earbox.net, jakub@...udflare.com
Cc:     netdev@...r.kernel.org, bpf@...r.kernel.org,
        john.fastabend@...il.com
Subject: [bpf-next PATCH v2 0/2] Add skb_adjust_room() for SK_SKB

This implements the helper skb_adjust_room() for BPF_SKS_SK_STREAM_VERDICT
programs so we can push/pop headers from the data on recieve. One use
case is to pop TLS headers off kTLS packets.

The first patch implements the helper and the second updates test_sockmap
to use it removing some case handling we had to do earlier to account for
the TLS headers in the kTLS tests.

v1->v2:
 Fix error path for TLS case (Daniel)
 check mode input is 0 because we don't use it now (Daniel)
 Remove incorrect/misleading comment (Lorenz)

Thanks,
John

---

John Fastabend (2):
      bpf, sockmap: add skb_adjust_room to pop bytes off ingress payload
      bpf, sockmap: update selftests to use skb_adjust_room


 net/core/filter.c                                  |   46 ++++++++++++++++++++
 .../selftests/bpf/progs/test_sockmap_kern.h        |   34 +++++++++++----
 tools/testing/selftests/bpf/test_sockmap.c         |   27 +++---------
 3 files changed, 77 insertions(+), 30 deletions(-)

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