cvs commit: src/sys/net if.h src/sys/netinet ip_output.c tcp_input.c tcp_subr.c tcp_var.h src/sys/netinet6 icmp6.c src/sys/sys mbuf.h

Andre Oppermann andre at
Wed Sep 6 15:25:27 PDT 2006

Andre Oppermann wrote:
> andre       2006-09-06 21:51:59 UTC
>   FreeBSD src repository
>   Modified files:
>     sys/net              if.h 
>     sys/netinet          ip_output.c tcp_input.c tcp_subr.c 
>                          tcp_var.h 
>     sys/netinet6         icmp6.c 
>     sys/sys              mbuf.h 
>   Log:
>   First step of TSO (TCP segmentation offload) support in our network stack.
>    o add IFCAP_TSO[46] for drivers to announce this capability for IPv4 and IPv6
>    o add CSUM_TSO flag to mbuf pkthdr csum_flags field
>    o add tso_segsz field to mbuf pkthdr
>    o enhance ip_output() packet length check to allow for large TSO packets
>    o extend tcp_maxmtu[46]() with a flag pointer to pass interface capabilities
>    o adjust all callers of tcp_maxmtu[46]() accordingly

Step 2 (the tcp_output() changes) follows as soon as the Intel guys are
done with testing in their lab together with an extended em(4) driver.


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