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path: root/net/ipv6/tcpv6_offload.c
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2015-02-28tcp: cleanup static functionsEric Dumazet1-2/+2
tcp_fastopen_create_child() is static and should not be exported. tcp4_gso_segment() and tcp6_gso_segment() should be static. Signed-off-by: Eric Dumazet <edumazet@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2014-09-26net: Remove gso_send_check as an offload callbackTom Herbert1-6/+0
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 <therbert@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2014-09-26tcp: move logic out of tcp_v[64]_gso_send_checkTom Herbert1-13/+24
In tcp_v[46]_gso_send_check the TCP checksum is initialized to the pseudo header checksum using __tcp_v[46]_send_check. We can move this logic into new tcp[46]_gso_segment functions to be done when ip_summed != CHECKSUM_PARTIAL (ip_summed == CHECKSUM_PARTIAL should be the common case, possibly always true when taking GSO path). After this change tcp_v[46]_gso_send_check is no-op. Signed-off-by: Tom Herbert <therbert@google.com> Acked-by: Eric Dumazet <edumazet@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2014-08-24tcp: Call skb_gro_checksum_validateTom Herbert1-23/+3
In tcp[64]_gro_receive call skb_gro_checksum_validate to validate TCP checksum in the gro context. Signed-off-by: Tom Herbert <therbert@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2014-07-16net-gre-gro: Fix a bug that breaks the forwarding pathJerry Chu1-1/+1
Fixed a bug that was introduced by my GRE-GRO patch (bf5a755f5e9186406bbf50f4087100af5bd68e40 net-gre-gro: Add GRE support to the GRO stack) that breaks the forwarding path because various GSO related fields were not set. The bug will cause on the egress path either the GSO code to fail, or a GRE-TSO capable (NETIF_F_GSO_GRE) NICs to choke. The following fix has been tested for both cases. Signed-off-by: H.K. Jerry Chu <hkchu@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2014-05-21ipv6: gro: fix CHECKSUM_COMPLETE supportEric Dumazet1-1/+1
When GRE support was added in linux-3.14, CHECKSUM_COMPLETE handling broke on GRE+IPv6 because we did not update/use the appropriate csum : GRO layer is supposed to use/update NAPI_GRO_CB(skb)->csum instead of skb->csum Tested using a GRE tunnel and IPv6 traffic. GRO aggregation now happens at the first level (ethernet device) instead of being done in gre tunnel. Native IPv6+TCP is still properly aggregated. Fixes: bf5a755f5e918 ("net-gre-gro: Add GRE support to the GRO stack") Signed-off-by: Eric Dumazet <edumazet@google.com> Cc: Jerry Chu <hkchu@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2013-12-12net-gro: Prepare GRO stack for the upcoming tunneling supportJerry Chu1-3/+3
This patch modifies the GRO stack to avoid the use of "network_header" and associated macros like ip_hdr() and ipv6_hdr() in order to allow an arbitary number of IP hdrs (v4 or v6) to be used in the encapsulation chain. This lays the foundation for various IP tunneling support (IP-in-IP, GRE, VXLAN, SIT,...) to be added later. With this patch, the GRO stack traversing now is mostly based on skb_gro_offset rather than special hdr offsets saved in skb (e.g., skb->network_header). As a result all but the top layer (i.e., the the transport layer) must have hdrs of the same length in order for a pkt to be considered for aggregation. Therefore when adding a new encap layer (e.g., for tunneling), one must check and skip flows (e.g., by setting NAPI_GRO_CB(p)->same_flow to 0) that have a different hdr length. Note that unlike the network header, the transport header can and will continue to be set by the GRO code since there will be at most one "transport layer" in the encap chain. Signed-off-by: H.K. Jerry Chu <hkchu@google.com> Suggested-by: Eric Dumazet <edumazet@google.com> Reviewed-by: Eric Dumazet <edumazet@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2013-11-23gro: Clean up tcpX_gro_receive checksum verificationHerbert Xu1-17/+10
This patch simplifies the checksum verification in tcpX_gro_receive by reusing the CHECKSUM_COMPLETE code for CHECKSUM_NONE. All it does for CHECKSUM_NONE is compute the partial checksum and then treat it as if it came from the hardware (CHECKSUM_COMPLETE). Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au> Cheers, Acked-by: Eric Dumazet <edumazet@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2013-11-23gro: Only verify TCP checksums for candidatesHerbert Xu1-0/+5
In some cases we may receive IP packets that are longer than their stated lengths. Such packets are never merged in GRO. However, we may end up computing their checksums incorrectly and end up allowing packets with a bogus checksum enter our stack with the checksum status set as verified. Since such packets are rare and not performance-critical, this patch simply skips the checksum verification for them. Reported-by: Alexander Duyck <alexander.h.duyck@intel.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au> Acked-by: Alexander Duyck <alexander.h.duyck@intel.com> Thanks, Acked-by: Eric Dumazet <edumazet@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2013-10-18tcp: rename tcp_tso_segment()Eric Dumazet1-1/+1
Rename tcp_tso_segment() to tcp_gso_segment(), to better reflect what is going on, and ease grep games. Signed-off-by: Eric Dumazet <edumazet@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2012-11-15net: Remove code duplication between offload structuresVlad Yasevich1-4/+6
Move the offload callbacks into its own structure. Signed-off-by: Vlad Yasevich <vyasevic@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2012-11-15ipv6: Pull IPv6 GSO registration out of the moduleVlad Yasevich1-5/+0
Sing GSO support is now separate, pull it out of the module and make it its own init call. Remove the cleanup functions as they are no longer called. Signed-off-by: Vlad Yasevich <vyasevic@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2012-11-15ipv6: Separate tcp offload functionalityVlad Yasevich1-0/+98
Pull TCPv6 offload functionality into its won file in preparation for moving it out of the module. Signed-off-by: Vlad Yasevich <vyasevic@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net>

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