linux-stable.git/include/linux/skbuff.h, branch linux-2.6.14.y

[PATCH] gfp flags annotations - part 1

2005-10-08T22:00:57+00:00

 - added typedef unsigned int __nocast gfp_t;

 - replaced __nocast uses for gfp flags with gfp_t - it gives exactly
   the same warnings as far as sparse is concerned, doesn't change
   generated code (from gcc point of view we replaced unsigned int with
   typedef) and documents what's going on far better.

Signed-off-by: Al Viro 
Signed-off-by: Linus Torvalds

[NET]: Fix packet timestamping.

2005-10-03T20:57:23+00:00

I've found the problem in general.  It affects any 64-bit
architecture.  The problem occurs when you change the system time.

Suppose that when you boot your system clock is forward by a day.
This gets recorded down in skb_tv_base.  You then wind the clock back
by a day.  From that point onwards the offset will be negative which
essentially overflows the 32-bit variables they're stored in.

In fact, why don't we just store the real time stamp in those 32-bit
variables? After all, we're not going to overflow for quite a while
yet.

When we do overflow, we'll need a better solution of course.

Signed-off-by: Herbert Xu 
Signed-off-by: David S. Miller

[NET]: Optimize pskb_trim_rcsum()

2005-09-08T19:32:03+00:00

Since packets almost never contain extra garbage at the end, it is
worthwhile to optimize for that case.

Signed-off-by: Stephen Hemminger 
Signed-off-by: David S. Miller

[NET]: skb_get/set_timestamp use const

2005-09-06T22:48:03+00:00

The new timestamp get/set routines should have const attribute
on parameters (helps to indicate direction).

Signed-off-by: Stephen Hemminger 
Signed-off-by: David S. Miller

[NET]: Implement SKB fast cloning.

2005-08-29T23:01:54+00:00

Protocols that make extensive use of SKB cloning,
for example TCP, eat at least 2 allocations per
packet sent as a result.

To cut the kmalloc() count in half, we implement
a pre-allocation scheme wherein we allocate
2 sk_buff objects in advance, then use a simple
reference count to free up the memory at the
correct time.

Based upon an initial patch by Thomas Graf and
suggestions from Herbert Xu.

Signed-off-by: David S. Miller

[NET]: Fix sparse warnings

2005-08-29T23:01:32+00:00

Of this type, mostly:

CHECK   net/ipv6/netfilter.c
net/ipv6/netfilter.c:96:12: warning: symbol 'ipv6_netfilter_init' was not declared. Should it be static?
net/ipv6/netfilter.c:101:6: warning: symbol 'ipv6_netfilter_fini' was not declared. Should it be static?

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

[NET]: Store skb->timestamp as offset to a base timestamp

2005-08-29T22:58:24+00:00

Reduces skb size by 8 bytes on 64-bit.

Signed-off-by: Patrick McHardy 
Signed-off-by: David S. Miller

[NET]: Kill skb->real_dev

2005-08-29T22:32:25+00:00

Bonding just wants the device before the skb_bond()
decapsulation occurs, so simply pass that original
device into packet_type->func() as an argument.

It remains to be seen whether we can use this same
exact thing to get rid of skb->input_dev as well.

Signed-off-by: David S. Miller

[NET]: Reduce tc_index/tc_verd to u16

2005-08-29T22:32:20+00:00

Signed-off-by: Patrick McHardy 
Signed-off-by: David S. Miller

[NET]: Remove HIPPI private from skbuff.h

2005-08-29T22:31:42+00:00

This removes the private element from skbuff, that is only used by
HIPPI. Instead it uses skb->cb[] to hold the additional data that is
needed in the output path from hard_header to device driver.

PS: The only qdisc that might potentially corrupt this cb[] is if
netem was used over HIPPI. I will take care of that by fixing netem
to use skb->stamp. I don't expect many users of netem over HIPPI

Signed-off-by: Stephen Hemminger 
Signed-off-by: David S. Miller