[PATCH net-next 0/3] udp: support SO_PEEK_OF

[PATCH net-next 0/3] udp: support SO_PEEK_OF

[Willem de Bruijn]

From: Willem de Bruijn <willemb@google.com>

Support peeking at a non-zero offset for UDP sockets. Match the
existing behavior on Unix datagram sockets.

1/3 makes the sk_peek_offset functions safe to use outside locks
2/3 removes udp headers before enqueue, to simplify offset arithmetic
3/3 introduces SO_PEEK_OFFSET support, with Unix socket peek semantics.

Changes
  v1->v2
    - squash patches 3 and 4

Willem de Bruijn (1):
  sock: convert sk_peek_offset functions to WRITE_ONCE

samanthakumar (2):
  udp: remove headers from UDP packets before queueing
  udp: enable MSG_PEEK at non-zero offset

 include/linux/skbuff.h |  7 ++++++-
 include/net/sock.h     | 27 ++++++++++++++++-----------
 include/net/udp.h      |  9 +++++++++
 net/core/datagram.c    |  9 ++++++---
 net/core/sock.c        | 28 ++++++++++++++++++++++------
 net/ipv4/af_inet.c     |  1 +
 net/ipv4/udp.c         | 38 ++++++++++++++++++++------------------
 net/ipv6/af_inet6.c    |  1 +
 net/ipv6/udp.c         | 30 ++++++++++++++++--------------
 9 files changed, 97 insertions(+), 53 deletions(-)

-- 
2.8.0.rc3.226.g39d4020

Re: [PATCH net-next 0/3] udp: support SO_PEEK_OF

[Willem de Bruijn]

> Support peeking at a non-zero offset for UDP sockets. Match the
> existing behavior on Unix datagram sockets.
>
> 1/3 makes the sk_peek_offset functions safe to use outside locks
> 2/3 removes udp headers before enqueue, to simplify offset arithmetic
> 3/3 introduces SO_PEEK_OFFSET support, with Unix socket peek semantics.

Please ignore this cover letter. I sent it to soon. It is superseded
by a v2 patch set.