linux-stable.git/net/ipv6/ip6_offload.c, branch linux-4.0.y

Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net

2014-11-30T04:47:48+00:00

ipv6: Do not treat a GSO_TCPV4 request from UDP tunnel over IPv6 as invalid

2014-11-23T19:18:11+00:00

This patch adds SKB_GSO_TCPV4 to the list of supported GSO types handled by
the IPv6 GSO offloads.  Without this change VXLAN tunnels running over IPv6
do not currently handle IPv4 TCP TSO requests correctly and end up handing
the non-segmented frame off to the device.

Below is the before and after for a simple netperf TCP_STREAM test between
two endpoints tunneling IPv4 over a VXLAN tunnel running on IPv6 on top of
a 1Gb/s network adapter.

Recv   Send    Send
Socket Socket  Message  Elapsed
Size   Size    Size     Time     Throughput
bytes  bytes   bytes    secs.    10^6bits/sec

 87380  16384  16384    10.29       0.88      Before
 87380  16384  16384    10.03     895.69      After

Signed-off-by: Alexander Duyck 
Signed-off-by: David S. Miller

net: Remove MPLS GSO feature.

2014-11-06T07:52:33+00:00

Device can export MPLS GSO support in dev->mpls_features same way
it export vlan features in dev->vlan_features. So it is safe to
remove NETIF_F_GSO_MPLS redundant flag.

Signed-off-by: Pravin B Shelar

udp: Changes to udp_offload to support remote checksum offload

2014-11-05T21:30:03+00:00

Add a new GSO type, SKB_GSO_TUNNEL_REMCSUM, which indicates remote
checksum offload being done (in this case inner checksum must not
be offloaded to the NIC).

Added logic in __skb_udp_tunnel_segment to handle remote checksum
offload case.

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

net: gso: use feature flag argument in all protocol gso handlers

2014-10-20T16:38:12+00:00

skb_gso_segment() has a 'features' argument representing offload features
available to the output path.

A few handlers, e.g. GRE, instead re-fetch the features of skb->dev and use
those instead of the provided ones when handing encapsulation/tunnels.

Depending on dev->hw_enc_features of the output device skb_gso_segment() can
then return NULL even when the caller has disabled all GSO feature bits,
as segmentation of inner header thinks device will take care of segmentation.

This e.g. affects the tbf scheduler, which will silently drop GRE-encap GSO skbs
that did not fit the remaining token quota as the segmentation does not work
when device supports corresponding hw offload capabilities.

Cc: Pravin B Shelar 
Signed-off-by: Florian Westphal 
Signed-off-by: David S. Miller

ipv6: fix a potential use after free in ip6_offload.c

2014-10-18T17:04:08+00:00

pskb_may_pull() maybe change skb->data and make opth pointer oboslete,
so set the opth again

Signed-off-by: Li RongQing 
Acked-by: Eric Dumazet 
Signed-off-by: David S. Miller

net: Remove gso_send_check as an offload callback

2014-09-26T04:22:47+00:00

The send_check logic was only interesting in cases of TCP offload and
UDP UFO where the checksum needed to be initialized to the pseudo
header checksum. Now we've moved that logic into the related
gso_segment functions so gso_send_check is no longer needed.

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

sit: Add gro callbacks to sit_offload

2014-09-10T04:29:33+00:00

Add ipv6_gro_receive and ipv6_gro_complete to sit_offload to
support GRO.

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

ipv6: Clear flush_id to make GRO work

2014-09-10T04:29:33+00:00

In TCP gro we check flush_id which is derived from the IP identifier.
In IPv4 gro path the flush_id is set with the expectation that every
matched packet increments IP identifier. In IPv6, the flush_id is
never set and thus is uinitialized. What's worse is that in IPv6
over IPv4 encapsulation, the IP identifier is taken from the outer
header which is currently not incremented on every packet for Linux
stack, so GRO in this case never matches packets (identifier is
not increasing).

This patch clears flush_id for every time for a matched packet in
IPv6 gro_receive. We need to do this each time to overwrite the
setting that would be done in IPv4 gro_receive per the outer
header in IPv6 over Ipv4 encapsulation.

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

ipv6: White-space cleansing : Line Layouts

2014-08-25T05:37:52+00:00

This patch makes no changes to the logic of the code but simply addresses
coding style issues as detected by checkpatch.

Both objdump and diff -w show no differences.

A number of items are addressed in this patch:
* Multiple spaces converted to tabs
* Spaces before tabs removed.
* Spaces in pointer typing cleansed (char *)foo etc.
* Remove space after sizeof
* Ensure spacing around comparators such as if statements.

Signed-off-by: Ian Morris 
Signed-off-by: David S. Miller