netdev - Introduce support to lazy initialize mostly static keys

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Message-Id: <1380238343-4318-1-git-send-email-hannes@stressinduktion.org>
Date:	Fri, 27 Sep 2013 01:32:16 +0200
From:	Hannes Frederic Sowa <hannes@...essinduktion.org>
To:	netdev@...r.kernel.org
Subject: Introduce support to lazy initialize mostly static keys

Hi!

This series implements support for delaying the initialization of secret
keys, e.g. used for hashing, for as long as possible. This functionality
is implemented by a new macro, net_get_random_bytes.

I already used it to protect the socket hashes, the syncookie secret
(most important) and the tcp_fastopen secrets.

This series depends on a patch from Eric Dumazet (already in patchworks):
"net: net_secret should not depend on TCP"

Included patches:
  ipv4: split inet_ehashfn to one hash
  ipv6: split inet6_ehashfn to one hash
  net: introduce new macro net_get_random_once
  inet: split syncookie keys for ipv4 and ipv6 and
  inet: convert inet_ehash_secret and
  tcp: switch tcp_fastopen key generation to
  net: switch net_secret key generation to

Diffstat:
 include/linux/net.h            |   14 ++++++++++++++
 include/net/inet6_hashtables.h |   29 +++++++----------------------
 include/net/inet_sock.h        |   26 ++++++--------------------
 include/net/ipv6.h             |    4 ++--
 include/net/tcp.h              |    3 +--
 net/core/secure_seq.c          |   14 ++------------
 net/core/utils.c               |   21 +++++++++++++++++++++
 net/ipv4/af_inet.c             |   27 ---------------------------
 net/ipv4/inet_hashtables.c     |   25 +++++++++++++++++++++++++
 net/ipv4/syncookies.c          |   15 +++++----------
 net/ipv4/sysctl_net_ipv4.c     |    5 +++++
 net/ipv4/tcp_fastopen.c        |   21 ++++++++++-----------
 net/ipv4/udp.c                 |   22 +++++++++++++++++-----
 net/ipv6/af_inet6.c            |    5 -----
 net/ipv6/inet6_hashtables.c    |   40 +++++++++++++++++++++++++++++++++++++---
 net/ipv6/syncookies.c          |   12 +++++++++---
 net/ipv6/udp.c                 |   37 ++++++++++++++++++++++++++++++-------
 net/rds/connection.c           |   18 ++++++++++++------
 18 files changed, 203 insertions(+), 135 deletions(-)


Greetings,

  Hannes

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