linux-toradex.git/include/linux/ipv6.h, branch v2.6.34

inet: rename some inet_sock fields

2009-10-19T01:52:53+00:00

In order to have better cache layouts of struct sock (separate zones
for rx/tx paths), we need this preliminary patch.

Goal is to transfert fields used at lookup time in the first
read-mostly cache line (inside struct sock_common) and move sk_refcnt
to a separate cache line (only written by rx path)

This patch adds inet_ prefix to daddr, rcv_saddr, dport, num, saddr,
sport and id fields. This allows a future patch to define these
fields as macros, like sk_refcnt, without name clashes.

Signed-off-by: Eric Dumazet 
Signed-off-by: David S. Miller

ipv6: Fix the size overflow of addrconf_sysctl array

2009-10-09T05:44:47+00:00

(This patch fixes bug of commit f7734fdf61ec6bb848e0bafc1fb8bad2c124bb50
 title "make TLLAO option for NA packets configurable")

When the IPV6 conf is used, the function sysctl_set_parent is called and the
array addrconf_sysctl is used as a parameter of the function.

The above patch added new conf "force_tllao" into the array addrconf_sysctl,
but the size of the array was not modified, the static allocated size is
DEVCONF_MAX + 1 but the real size is DEVCONF_MAX + 2, so the problem is
that the function sysctl_set_parent accessed wrong address.

I got the following information.
Call Trace:
    [] sysctl_set_parent+0x29/0x3e
    [] sysctl_set_parent+0x29/0x3e
    [] sysctl_set_parent+0x29/0x3e
    [] sysctl_set_parent+0x29/0x3e
    [] sysctl_set_parent+0x29/0x3e
    [] __register_sysctl_paths+0xde/0x272
    [] ? __kmalloc_track_caller+0x16e/0x180
    [] ? __addrconf_sysctl_register+0xc5/0x144 [ipv6]
    [] register_net_sysctl_table+0x48/0x4b
    [] __addrconf_sysctl_register+0xf7/0x144 [ipv6]
    [] addrconf_init_net+0xd4/0x104 [ipv6]
    [] setup_net+0x35/0x82
    [] copy_net_ns+0x76/0xe0
    [] create_new_namespaces+0xf0/0x16e
    [] copy_namespaces+0x65/0x9f
    [] copy_process+0xb2c/0x12c3
    [] do_fork+0x14b/0x2d2
    [] ? up_read+0xe/0x10
    [] ? do_page_fault+0x27a/0x2aa
    [] sys_clone+0x28/0x2a
    [] stub_clone+0x13/0x20
    [] ? system_call_fastpath+0x16/0x1b

And the information of IPV6 in .config is as following.
IPV6 in .config:
    CONFIG_IPV6=m
    CONFIG_IPV6_PRIVACY=y
    CONFIG_IPV6_ROUTER_PREF=y
    CONFIG_IPV6_ROUTE_INFO=y
    CONFIG_IPV6_OPTIMISTIC_DAD=y
    CONFIG_IPV6_MIP6=m
    CONFIG_IPV6_SIT=m
    # CONFIG_IPV6_SIT_6RD is not set
    CONFIG_IPV6_NDISC_NODETYPE=y
    CONFIG_IPV6_TUNNEL=m
    CONFIG_IPV6_MULTIPLE_TABLES=y
    CONFIG_IPV6_SUBTREES=y
    CONFIG_IPV6_MROUTE=y
    CONFIG_IPV6_PIMSM_V2=y
    # CONFIG_IP_VS_IPV6 is not set
    CONFIG_NF_CONNTRACK_IPV6=m
    CONFIG_IP6_NF_MATCH_IPV6HEADER=m

I confirmed this patch fixes this problem.

Signed-off-by: Jin Dongming 
Signed-off-by: David S. Miller

make TLLAO option for NA packets configurable

2009-10-07T08:10:45+00:00

On Friday 02 October 2009 20:53:51 you wrote:

> This is good although I would have shortened the name.

Ah, I knew I forgot something :) Here is v4.

tavi

>From 24d96d825b9fa832b22878cc6c990d5711968734 Mon Sep 17 00:00:00 2001
From: Octavian Purdila 
Date: Fri, 2 Oct 2009 00:51:15 +0300
Subject: [PATCH] ipv6: new sysctl for sending TLLAO with unicast NAs

Neighbor advertisements responding to unicast neighbor solicitations
did not include the target link-layer address option. This patch adds
a new sysctl option (disabled by default) which controls whether this
option should be sent even with unicast NAs.

The need for this arose because certain routers expect the TLLAO in
some situations even as a response to unicast NS packets.

Moreover, RFC 2461 recommends sending this to avoid a race condition
(section 4.4, Target link-layer address)

Signed-off-by: Cosmin Ratiu 
Signed-off-by: Octavian Purdila 
Signed-off-by: David S. Miller

IPv6: Add 'autoconf' and 'disable_ipv6' module parameters

2009-06-01T10:07:33+00:00

Add 'autoconf' and 'disable_ipv6' parameters to the IPv6 module.

The first controls if IPv6 addresses are autoconfigured from
prefixes received in Router Advertisements.  The IPv6 loopback
(::1) and link-local addresses are still configured.

The second controls if IPv6 addresses are desired at all.  No
IPv6 addresses will be added to any interfaces.

Signed-off-by: Brian Haley 
Signed-off-by: David S. Miller

headers_check fix: linux/ipv6.h

2009-01-30T18:28:41+00:00

fix the following 'make headers_check' warning:

  usr/include/linux/ipv6.h:26: found __[us]{8,16,32,64} type without #include 

Signed-off-by: Jaswinder Singh Rajput

ipv6: Add IPV6_PKTINFO sticky option support to setsockopt()

2008-12-16T10:06:23+00:00

There are three reasons for me to add this support:
1.When no interface is specified in an IPV6_PKTINFO ancillary data
  item, the interface specified in an IPV6_PKTINFO sticky optionis 
  is used.

RFC3542:
6.7.  Summary of Outgoing Interface Selection

   This document and [RFC-3493] specify various methods that affect the
   selection of the packet's outgoing interface.  This subsection
   summarizes the ordering among those in order to ensure deterministic
   behavior.

   For a given outgoing packet on a given socket, the outgoing interface
   is determined in the following order:

   1. if an interface is specified in an IPV6_PKTINFO ancillary data
      item, the interface is used.

   2. otherwise, if an interface is specified in an IPV6_PKTINFO sticky
      option, the interface is used.

2.When no IPV6_PKTINFO ancillary data is received,getsockopt() should 
  return the sticky option value which set with setsockopt().

RFC 3542:
   Issuing getsockopt() for the above options will return the sticky
   option value i.e., the value set with setsockopt().  If no sticky
   option value has been set getsockopt() will return the following
   values:

3.Make the setsockopt implementation POSIX compliant.

Signed-off-by: Yang Hongyang 
Signed-off-by: David S. Miller

ipv6: KERNEL ifdef struct ipv6_devconf

2008-07-21T20:41:16+00:00

Based upon a report by Olaf Hering.

Signed-off-by: David S. Miller

ipv6 addrconf: add accept_dad sysctl to control DAD operation.

2008-07-03T08:51:56+00:00

- If 0, disable DAD.
- If 1, perform DAD (default).
- If >1, perform DAD and disable IPv6 operation if DAD for MAC-based
  link-local address has been failed (RFC4862 5.4.5).

We do not follow RFC4862 by default.  Refer to the netdev thread entitled
"Linux IPv6 DAD not full conform to RFC 4862 ?"
	http://www.spinics.net/lists/netdev/msg52027.html

Signed-off-by: YOSHIFUJI Hideaki

ipv6: Add disable_ipv6 sysctl to disable IPv6 operaion on specific interface.

2008-07-03T08:51:55+00:00

Signed-off-by: YOSHIFUJI Hideaki

inet{6}_request_sock: Init ->opt and ->pktopts in the constructor

2008-06-10T19:39:35+00:00

Wei Yongjun noticed that we may call reqsk_free on request sock objects where
the opt fields may not be initialized, fix it by introducing inet_reqsk_alloc
where we initialize ->opt to NULL and set ->pktopts to NULL in
inet6_reqsk_alloc.

Signed-off-by: Arnaldo Carvalho de Melo 
Signed-off-by: David S. Miller