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authorArnaldo Carvalho de Melo <acme@ghostprotocols.net>2005-06-19 09:46:52 +0400
committerDavid S. Miller <davem@davemloft.net>2005-06-19 09:46:52 +0400
commit2e6599cb899ba4b133f42cbf9d2b1883d2dc583a (patch)
treeb5d4fcca4d2a515fc3d3d20cefaaeebd8dbf661f /include/linux/ip.h
parent1944972d3bb651474a5021c9da8d0166ae19f1eb (diff)
downloadlinux-2e6599cb899ba4b133f42cbf9d2b1883d2dc583a.tar.xz
[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/ip.h')
-rw-r--r--include/linux/ip.h21
1 files changed, 21 insertions, 0 deletions
diff --git a/include/linux/ip.h b/include/linux/ip.h
index 8438c68591f9..d5b7c907204e 100644
--- a/include/linux/ip.h
+++ b/include/linux/ip.h
@@ -81,6 +81,7 @@
#ifdef __KERNEL__
#include <linux/config.h>
#include <linux/types.h>
+#include <net/request_sock.h>
#include <net/sock.h>
#include <linux/igmp.h>
#include <net/flow.h>
@@ -107,6 +108,26 @@ struct ip_options {
#define optlength(opt) (sizeof(struct ip_options) + opt->optlen)
+struct inet_request_sock {
+ struct open_request req;
+ u32 loc_addr;
+ u32 rmt_addr;
+ u16 rmt_port;
+ u16 snd_wscale : 4,
+ rcv_wscale : 4,
+ tstamp_ok : 1,
+ sack_ok : 1,
+ wscale_ok : 1,
+ ecn_ok : 1,
+ acked : 1;
+ struct ip_options *opt;
+};
+
+static inline struct inet_request_sock *inet_rsk(const struct open_request *sk)
+{
+ return (struct inet_request_sock *)sk;
+}
+
struct ipv6_pinfo;
struct inet_sock {