linux-toradex.git/net/ipv6/icmp.c, branch v3.2.4

net: more accurate skb truesize

2011-10-13T20:05:07+00:00

skb truesize currently accounts for sk_buff struct and part of skb head.
kmalloc() roundings are also ignored.

Considering that skb_shared_info is larger than sk_buff, its time to
take it into account for better memory accounting.

This patch introduces SKB_TRUESIZE(X) macro to centralize various
assumptions into a single place.

At skb alloc phase, we put skb_shared_info struct at the exact end of
skb head, to allow a better use of memory (lowering number of
reallocations), since kmalloc() gives us power-of-two memory blocks.

Unless SLUB/SLUB debug is active, both skb->head and skb_shared_info are
aligned to cache lines, as before.

Note: This patch might trigger performance regressions because of
misconfigured protocol stacks, hitting per socket or global memory
limits that were previously not reached. But its a necessary step for a
more accurate memory accounting.

Signed-off-by: Eric Dumazet 
CC: Andi Kleen 
CC: Ben Hutchings 
Signed-off-by: David S. Miller

ipv6: some RCU conversions

2011-08-01T07:12:00+00:00

ICMP and ND are not fast path, but still we can avoid changing idev
refcount, using RCU.

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

inet: constify ip headers and in6_addr

2011-04-22T18:04:14+00:00

Add const qualifiers to structs iphdr, ipv6hdr and in6_addr pointers
where possible, to make code intention more obvious.

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

net: Put fl6_* macros to struct flowi6 and use them again.

2011-03-12T23:08:55+00:00

Signed-off-by: David S. Miller

ipv6: Convert to use flowi6 where applicable.

2011-03-12T23:08:54+00:00

Signed-off-by: David S. Miller

net: Make flowi ports AF dependent.

2011-03-12T23:08:46+00:00

Create two sets of port member accessors, one set prefixed by fl4_*
and the other prefixed by fl6_*

This will let us to create AF optimal flow instances.

It will work because every context in which we access the ports,
we have to be fully aware of which AF the flowi is anyways.

Signed-off-by: David S. Miller

net: Put flowi_* prefix on AF independent members of struct flowi

2011-03-12T23:08:44+00:00

I intend to turn struct flowi into a union of AF specific flowi
structs.  There will be a common structure that each variant includes
first, much like struct sock_common.

This is the first step to move in that direction.

Signed-off-by: David S. Miller

xfrm: Return dst directly from xfrm_lookup()

2011-03-02T21:27:41+00:00

Instead of on the stack.

Signed-off-by: David S. Miller

ipv6: Make icmp route lookup code a bit clearer.

2011-03-02T06:07:37+00:00

The route lookup code in icmpv6_send() is slightly tricky as a result of
having to handle all of the requirements of RFC 4301 host relookups.

Pull the route resolution into a seperate function, so that the error
handling and route reference counting is hopefully easier to see and
contained wholly within this new routine.

Signed-off-by: David S. Miller

inetpeer: Move ICMP rate limiting state into inet_peer entries.

2011-02-04T23:59:53+00:00

Like metrics, the ICMP rate limiting bits are cached state about
a destination.  So move it into the inet_peer entries.

If an inet_peer cannot be bound (the reason is memory allocation
failure or similar), the policy is to allow.

Signed-off-by: David S. Miller