netdev - [PATCH bpf-next v2 0/4] Provide bpf_sk_storage data in INET

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Message-ID: <20200225230402.1974723-1-kafai@fb.com>
Date:   Tue, 25 Feb 2020 15:04:02 -0800
From:   Martin KaFai Lau <kafai@...com>
To:     <bpf@...r.kernel.org>
CC:     Alexei Starovoitov <ast@...nel.org>,
        Daniel Borkmann <daniel@...earbox.net>,
        David Miller <davem@...emloft.net>, <kernel-team@...com>,
        <netdev@...r.kernel.org>
Subject: [PATCH bpf-next v2 0/4] Provide bpf_sk_storage data in INET_DIAG

The bpf_prog can store specific info to a sk by using bpf_sk_storage.
In other words, a sk can be extended by a bpf_prog.

This series is to support providing bpf_sk_storage data during inet_diag's
dump.  The primary target is the usage like iproute2's "ss".

The first two patches are refactoring works in inet_diag to make
adding bpf_sk_storage support easier.  The next two patches do
the actual work.

Please see individual patch for details.

v2:
- Add commit message for u16 to u32 change in min_dump_alloc in Patch 4 (Song)
- Add comment to explain the !skb->len check in __inet_diag_dump in Patch 4.
- Do the map->map_type check earlier in Patch 3 for readability.

Martin KaFai Lau (4):
  inet_diag: Refactor inet_sk_diag_fill(), dump(), and dump_one()
  inet_diag: Move the INET_DIAG_REQ_BYTECODE nlattr to cb->data
  bpf: INET_DIAG support in bpf_sk_storage
  bpf: inet_diag: Dump bpf_sk_storages in inet_diag_dump()

 include/linux/bpf.h            |   1 +
 include/linux/inet_diag.h      |  27 +--
 include/linux/netlink.h        |   4 +-
 include/net/bpf_sk_storage.h   |  27 +++
 include/uapi/linux/inet_diag.h |   5 +-
 include/uapi/linux/sock_diag.h |  26 +++
 kernel/bpf/syscall.c           |  15 ++
 net/core/bpf_sk_storage.c      | 283 +++++++++++++++++++++++++++++-
 net/dccp/diag.c                |   9 +-
 net/ipv4/inet_diag.c           | 307 ++++++++++++++++++++-------------
 net/ipv4/raw_diag.c            |  24 ++-
 net/ipv4/tcp_diag.c            |   8 +-
 net/ipv4/udp_diag.c            |  41 +++--
 net/sctp/diag.c                |   7 +-
 14 files changed, 599 insertions(+), 185 deletions(-)

-- 
2.17.1