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authorArnaldo Carvalho de Melo <acme@ghostprotocols.net>2005-06-18 22:46:52 -0700
committerDavid S. Miller <davem@davemloft.net>2005-06-18 22:46:52 -0700
commit2e6599cb899ba4b133f42cbf9d2b1883d2dc583a (patch)
treeb5d4fcca4d2a515fc3d3d20cefaaeebd8dbf661f /include/linux/tcp.h
parent1944972d3bb651474a5021c9da8d0166ae19f1eb (diff)
downloadop-kernel-dev-2e6599cb899ba4b133f42cbf9d2b1883d2dc583a.zip
op-kernel-dev-2e6599cb899ba4b133f42cbf9d2b1883d2dc583a.tar.gz
[NET] Generalise TCP's struct open_request minisock infrastructure
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 open_request. 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 or_calltable. 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, etc. Signed-off-by: Arnaldo Carvalho de Melo <acme@ghostprotocols.net> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'include/linux/tcp.h')
-rw-r--r--include/linux/tcp.h11
1 files changed, 11 insertions, 0 deletions
diff --git a/include/linux/tcp.h b/include/linux/tcp.h
index 14a55e3..86771b3 100644
--- a/include/linux/tcp.h
+++ b/include/linux/tcp.h
@@ -230,6 +230,17 @@ struct tcp_options_received {
__u16 mss_clamp; /* Maximal mss, negotiated at connection setup */
};
+struct tcp_request_sock {
+ struct inet_request_sock req;
+ __u32 rcv_isn;
+ __u32 snt_isn;
+};
+
+static inline struct tcp_request_sock *tcp_rsk(const struct open_request *req)
+{
+ return (struct tcp_request_sock *)req;
+}
+
struct tcp_sock {
/* inet_sock has to be the first member of tcp_sock */
struct inet_sock inet;
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