linux-toradex.git/include/net/ip6_fib.h, branch v2.6.24.2

[IPV6] XFRM: Fix connected socket to use transformation.

2007-10-10T23:48:32+00:00

When XFRM policy and state are ready after TCP connection is started,
the traffic should be transformed immediately, however it does not
on IPv6 TCP.

It depends on a dst cache replacement policy with connected socket.
It seems that the replacement is always done for IPv4, however, on
IPv6 case it is done only when routing cookie is changed.

This patch fix that non-transformation dst can be changed to
transformation one.
This behavior is required by MIPv6 and improves IPv6 IPsec.

Fixes by Masahide NAKAMURA.

Signed-off-by: Noriaki TAKAMIYA 
Signed-off-by: Masahide NAKAMURA 
Signed-off-by: David S. Miller

[IPv6]: Use rtnl registration interface

2007-04-26T05:27:13+00:00

Signed-off-by: Thomas Graf 
Signed-off-by: David S. Miller

[IPV6]: Fix routing round-robin locking.

2007-03-26T01:48:05+00:00

As per RFC2461, section 6.3.6, item #2, when no routers on the
matching list are known to be reachable or probably reachable we
do round robin on those available routes so that we make sure
to probe as many of them as possible to detect when one becomes
reachable faster.

Each routing table has a rwlock protecting the tree and the linked
list of routes at each leaf.  The round robin code executes during
lookup and thus with the rwlock taken as a reader.  A small local
spinlock tries to provide protection but this does not work at all
for two reasons:

1) The round-robin list manipulation, as coded, goes like this (with
   read lock held):

	walk routes finding head and tail

	spin_lock();
	rotate list using head and tail
	spin_unlock();

   While one thread is rotating the list, another thread can
   end up with stale values of head and tail and then proceed
   to corrupt the list when it gets the lock.  This ends up causing
   the OOPS in fib6_add() later onthat many people have been hitting.

2) All the other code paths that run with the rwlock held as
   a reader do not expect the list to change on them, they
   expect it to remain completely fixed while they hold the
   lock in that way.

So, simply stated, it is impossible to implement this correctly using
a manipulation of the list without violating the rwlock locking
semantics.

Reimplement using a per-fib6_node round-robin pointer.  This way we
don't need to manipulate the list at all, and since the round-robin
pointer can only ever point to real existing entries we don't need
to perform any locking on the changing of the round-robin pointer
itself.  We only need to reset the round-robin pointer to NULL when
the entry it is pointing to is removed.

The idea is from Thomas Graf and it is very similar to how this
was implemented before the advanced router selection code when in.

Signed-off-by: David S. Miller

[IPV6]: Convert ipv6 route to use the new dst_entry 'next' pointer

2007-02-11T07:20:40+00:00

This patch removes the next pointer from 'struct rt6_info.u' union,
and renames u.next to u.dst.rt6_next.

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

[IPV6]: Make fib6_node subtree depend on IPV6_SUBTREES

2006-12-14T00:48:31+00:00

Make fib6_node 'subtree' depend on IPV6_SUBTREES.

Signed-off-by: Kim Nordlund 
Signed-off-by: David S. Miller

[IPV6]: Introduce ip6_dst_idev() to get inet6_dev{} stored in dst_entry{}.

2006-12-03T05:22:07+00:00

Otherwise, we will see a lot of casts...

Signed-off-by: YOSHIFUJI Hideaki

[IPV6] ROUTE: Unify RT6_F_xxx and RT6_SELECT_F_xxx flags

2006-09-22T21:55:56+00:00

Unify RT6_F_xxx and RT6_SELECT_F_xxx flags into
RT6_LOOKUP_F_xxx flags, and put them into ip6_route.h

Signed-off-by: YOSHIFUJI Hideaki 
Acked-by: Ville Nuorvala

[IPV6] ROUTE: Put SUBTREE() as FIB6_SUBTREE() into ip6_fib.h for future use.

2006-09-22T21:55:51+00:00

Based on MIPL2 kernel patch.

Signed-off-by: YOSHIFUJI Hideaki 
Signed-off-by: Ville Nuorvala 
Signed-off-by: David S. Miller

[IPv6] route: FIB6 configuration using struct fib6_config

2006-09-22T21:55:12+00:00

Replaces the struct in6_rtmsg based interface orignating from
the ioctl interface with a struct fib6_config based on. Allows
changing the interface without breaking the ioctl interface
and avoids passing on tons of parameters.

The recently introduced struct nl_info is used to pass on
netlink authorship information for notifications.

Signed-off-by: Thomas Graf 
Signed-off-by: David S. Miller

[IPV6] ip6_fib.c: make code static

2006-09-22T21:54:38+00:00

Make the following needlessly global code static:
- fib6_walker_lock
- struct fib6_walker_list
- fib6_walk_continue()
- fib6_walk()

Signed-off-by: Adrian Bunk 
Signed-off-by: Andrew Morton 
Signed-off-by: David S. Miller