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ipip: add GSO/TSO support

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Now inet_gso_segment() is stackable, its relatively easy to
implement GSO/TSO support for IPIP

Performance results, when segmentation is done after tunnel
device (as no NIC is yet enabled for TSO IPIP support) :

Before patch :

lpq83:~# ./netperf -H 7.7.9.84 -Cc
MIGRATED TCP STREAM TEST from 0.0.0.0 (0.0.0.0) port 0 AF_INET to 7.7.9.84 () port 0 AF_INET
Recv   Send    Send                          Utilization       Service Demand
Socket Socket  Message  Elapsed              Send     Recv     Send    Recv
Size   Size    Size     Time     Throughput  local    remote   local   remote
bytes  bytes   bytes    secs.    10^6bits/s  % S      % S      us/KB   us/KB

 87380  16384  16384    10.00      3357.88   5.09     3.70     2.983   2.167

After patch :

lpq83:~# ./netperf -H 7.7.9.84 -Cc
MIGRATED TCP STREAM TEST from 0.0.0.0 (0.0.0.0) port 0 AF_INET to 7.7.9.84 () port 0 AF_INET
Recv   Send    Send                          Utilization       Service Demand
Socket Socket  Message  Elapsed              Send     Recv     Send    Recv
Size   Size    Size     Time     Throughput  local    remote   local   remote
bytes  bytes   bytes    secs.    10^6bits/s  % S      % S      us/KB   us/KB

 87380  16384  16384    10.00      7710.19   4.52     6.62     1.152   1.687

Signed-off-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Eric Dumazet
2013-10-19 11:42:57 -07:00
committed by David S. Miller
parent 3347c96029
commit cb32f511a7
11 changed files with 29 additions and 8 deletions
Download Patch File Download Diff File Expand all files Collapse all files

6
include/linux/skbuff.h
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@@ -318,9 +318,11 @@ enum {
SKB_GSO_GRE = 1 << 6,
SKB_GSO_UDP_TUNNEL = 1 << 7,
SKB_GSO_IPIP = 1 << 7,
SKB_GSO_MPLS = 1 << 8,
SKB_GSO_UDP_TUNNEL = 1 << 8,
SKB_GSO_MPLS = 1 << 9,
};
#if BITS_PER_LONG > 32