netdev - [PATCH RFC v2 bpf-next 0/2] bpf: Enable bpf_skc_to_* sock casting helper to networking prog type

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Message-ID: <20200915231857.1306320-1-kafai@fb.com>
Date:   Tue, 15 Sep 2020 16:18:57 -0700
From:   Martin KaFai Lau <kafai@...com>
To:     <bpf@...r.kernel.org>
CC:     Alexei Starovoitov <ast@...nel.org>,
        Daniel Borkmann <daniel@...earbox.net>, <kernel-team@...com>,
        Lorenz Bauer <lmb@...udflare.com>, <netdev@...r.kernel.org>
Subject: [PATCH RFC v2 bpf-next 0/2] bpf: Enable bpf_skc_to_* sock casting helper to networking prog type

This set allows networking prog type to directly read fields from
the in-kernel socket type, e.g. "struct tcp_sock".

Patch 2 has the details on the use case.

It is currently under RFC since it needs proper tests and it builds on
top of Lorenz's patches: 
   https://lore.kernel.org/bpf/20200910125631.225188-1-lmb@cloudflare.com/

v2:
- Add ARG_PTR_TO_SOCK_COMMON_OR_NULL (Lorenz)

Martin KaFai Lau (2):
  bpf: Move the PTR_TO_BTF_ID check to check_reg_type()
  bpf: Enable bpf_skc_to_* sock casting helper to networking prog type

 include/linux/bpf.h   |  1 +
 kernel/bpf/verifier.c | 97 +++++++++++++++++++++++++++++--------------
 net/core/filter.c     | 73 ++++++++++++++++++++++----------
 3 files changed, 117 insertions(+), 54 deletions(-)

-- 
2.24.1