• Arnaldo Carvalho de Melo's avatar
    [NET] Generalise TCP's struct open_request minisock infrastructure · 2e6599cb
    Arnaldo Carvalho de Melo authored
    Kept this first changeset minimal, without changing existing names to
    ease peer review.
    Basicaly tcp_openreq_alloc now receives the or_calltable, that in turn
    has two new members:
    ->slab, that replaces tcp_openreq_cachep
    ->obj_size, to inform the size of the openreq descendant for
      a specific protocol
    The protocol specific fields in struct open_request were moved to a
    class hierarchy, with the things that are common to all connection
    oriented PF_INET protocols in struct inet_request_sock, the TCP ones
    in tcp_request_sock, that is an inet_request_sock, that is an
    I.e. this uses the same approach used for the struct sock class
    hierarchy, with sk_prot indicating if the protocol wants to use the
    open_request infrastructure by filling in sk_prot->rsk_prot with an
    Results? Performance is improved and TCP v4 now uses only 64 bytes per
    open request minisock, down from 96 without this patch :-)
    Next changeset will rename some of the structs, fields and functions
    mentioned above, struct or_calltable is way unclear, better name it
    struct request_sock_ops, s/struct open_request/struct request_sock/g,
    Signed-off-by: default avatarArnaldo Carvalho de Melo <acme@ghostprotocols.net>
    Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
sock.h 36.6 KB