linux-stable.git/include/linux/skbuff.h, branch linux-2.6.18.y

[INET]: Use pskb_trim_unique when trimming paged unique skbs

2006-08-14T03:12:58+00:00

The IPv4/IPv6 datagram output path was using skb_trim to trim paged
packets because they know that the packet has not been cloned yet
(since the packet hasn't been given to anything else in the system).

This broke because skb_trim no longer allows paged packets to be
trimmed.  Paged packets must be given to one of the pskb_trim functions
instead.

This patch adds a new pskb_trim_unique function to cover the IPv4/IPv6
datagram output path scenario and replaces the corresponding skb_trim
calls with it.

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

[NET]: Fix alloc_skb comment typo

2006-08-07T22:49:53+00:00

Signed-off-by: Christoph Hellwig 
Signed-off-by: David S. Miller

[NET]: skb_queue_lock_key() is no longer used.

2006-08-02T21:07:58+00:00

Signed-off-by: Adrian Bunk 
Acked-by: Arjan van de Ven 
Signed-off-by: Andrew Morton 
Signed-off-by: David S. Miller

[NET]: Remove lockdep_set_class() call from skb_queue_head_init().

2006-08-02T21:06:55+00:00

The skb_queue_head_init() function is used both in drivers for private use
and in the core networking code.  The usage models are vastly set of
functions that is only softirq safe; while the driver usage tends to be
more limited to a few hardirq safe accessor functions.  Rather than
annotating all 133+ driver usages, for now just split this lock into a per
queue class.  This change is obviously safe and probably should make
2.6.18.

Signed-off-by: Arjan van de Ven 
Signed-off-by: Ingo Molnar 
Signed-off-by: Andrew Morton 
Signed-off-by: David S. Miller

[NET]: Add netdev_alloc_skb().

2006-08-02T20:38:25+00:00

Add a dev_alloc_skb variant that takes a struct net_device * paramater.
For now that paramater is unused, but I'll use it to allocate the skb
from node-local memory in a follow-up patch.  Also there have been some
other plans mentioned on the list that can use it.

Signed-off-by: Christoph Hellwig 
Signed-off-by: David S. Miller

[NET]: Correct dev_alloc_skb kerneldoc

2006-07-24T22:31:14+00:00

dev_alloc_skb is designated for RX descriptors, not TX.  (Some drivers
use it for the latter anyway, but that's a different story)

Signed-off-by: Christoph Hellwig 
Signed-off-by: David S. Miller

[NET]: Remove CONFIG_HAVE_ARCH_DEV_ALLOC_SKB

2006-07-24T22:30:28+00:00

skbuff.h has an #ifndef CONFIG_HAVE_ARCH_DEV_ALLOC_SKB to allow
architectures to reimplement __dev_alloc_skb.  It's not set on any
architecture and now that we have an architecture-overrideable
NET_SKB_PAD there is not point at all to have one either.

Signed-off-by: Christoph Hellwig 
Signed-off-by: David S. Miller

[NET] gso: Add skb_is_gso

2006-07-08T20:34:32+00:00

This patch adds the wrapper function skb_is_gso which can be used instead
of directly testing skb_shinfo(skb)->gso_size.  This makes things a little
nicer and allows us to change the primary key for indicating whether an skb
is GSO (if we ever want to do that).

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

[PATCH] lockdep: annotate skb_queue_head_init

2006-07-03T22:27:07+00:00

Teach special (multi-initialized) locking code to the lock validator.  Has no
effect on non-lockdep kernels.

Signed-off-by: Ingo Molnar 
Signed-off-by: Arjan van de Ven 
Cc: "David S. Miller" 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

[IPV6]: Added GSO support for TCPv6

2006-06-30T21:12:10+00:00

This patch adds GSO support for IPv6 and TCPv6.  This is based on a patch
by Ananda Raju .  His original description is:

	This patch enables TSO over IPv6. Currently Linux network stacks
	restricts TSO over IPv6 by clearing of the NETIF_F_TSO bit from
	"dev->features". This patch will remove this restriction.

	This patch will introduce a new flag NETIF_F_TSO6 which will be used
	to check whether device supports TSO over IPv6. If device support TSO
	over IPv6 then we don't clear of NETIF_F_TSO and which will make the
	TCP layer to create TSO packets. Any device supporting TSO over IPv6
	will set NETIF_F_TSO6 flag in "dev->features" along with NETIF_F_TSO.

	In case when user disables TSO using ethtool, NETIF_F_TSO will get
	cleared from "dev->features". So even if we have NETIF_F_TSO6 we don't
	get TSO packets created by TCP layer.

	SKB_GSO_TCPV4 renamed to SKB_GSO_TCP to make it generic GSO packet.
	SKB_GSO_UDPV4 renamed to SKB_GSO_UDP as UFO is not a IPv4 feature.
	UFO is supported over IPv6 also

	The following table shows there is significant improvement in
	throughput with normal frames and CPU usage for both normal and jumbo.

	--------------------------------------------------
	|          |     1500        |      9600         |
	|          ------------------|-------------------|
	|          | thru     CPU    |  thru     CPU     |
	--------------------------------------------------
	| TSO OFF  | 2.00   5.5% id  |  5.66   20.0% id  |
	--------------------------------------------------
	| TSO ON   | 2.63   78.0 id  |  5.67   39.0% id  |
	--------------------------------------------------

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