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authorChristoph Paasch <christoph.paasch@uclouvain.be>2013-03-17 12:23:34 +0400
committerDavid S. Miller <davem@davemloft.net>2013-03-17 22:35:13 +0400
commit1a2c6181c4a1922021b4d7df373bba612c3e5f04 (patch)
tree1346c9b1db83495a98fbcf95f8e521c67fc55cb9 /include/linux/tcp.h
parent94d8f2b133c9ff97105adc1233d1a35e16e1e7a6 (diff)
downloadlinux-1a2c6181c4a1922021b4d7df373bba612c3e5f04.tar.xz
tcp: Remove TCPCT
TCPCT uses option-number 253, reserved for experimental use and should not be used in production environments. Further, TCPCT does not fully implement RFC 6013. As a nice side-effect, removing TCPCT increases TCP's performance for very short flows: Doing an apache-benchmark with -c 100 -n 100000, sending HTTP-requests for files of 1KB size. before this patch: average (among 7 runs) of 20845.5 Requests/Second after: average (among 7 runs) of 21403.6 Requests/Second Signed-off-by: Christoph Paasch <christoph.paasch@uclouvain.be> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'include/linux/tcp.h')
-rw-r--r--include/linux/tcp.h10
1 files changed, 0 insertions, 10 deletions
diff --git a/include/linux/tcp.h b/include/linux/tcp.h
index 763c108ee03d..ed6a7456eecd 100644
--- a/include/linux/tcp.h
+++ b/include/linux/tcp.h
@@ -90,9 +90,6 @@ struct tcp_options_received {
sack_ok : 4, /* SACK seen on SYN packet */
snd_wscale : 4, /* Window scaling received from sender */
rcv_wscale : 4; /* Window scaling to send to receiver */
- u8 cookie_plus:6, /* bytes in authenticator/cookie option */
- cookie_out_never:1,
- cookie_in_always:1;
u8 num_sacks; /* Number of SACK blocks */
u16 user_mss; /* mss requested by user in ioctl */
u16 mss_clamp; /* Maximal mss, negotiated at connection setup */
@@ -102,7 +99,6 @@ static inline void tcp_clear_options(struct tcp_options_received *rx_opt)
{
rx_opt->tstamp_ok = rx_opt->sack_ok = 0;
rx_opt->wscale_ok = rx_opt->snd_wscale = 0;
- rx_opt->cookie_plus = 0;
}
/* This is the max number of SACKS that we'll generate and process. It's safe
@@ -320,12 +316,6 @@ struct tcp_sock {
struct tcp_md5sig_info __rcu *md5sig_info;
#endif
- /* When the cookie options are generated and exchanged, then this
- * object holds a reference to them (cookie_values->kref). Also
- * contains related tcp_cookie_transactions fields.
- */
- struct tcp_cookie_values *cookie_values;
-
/* TCP fastopen related information */
struct tcp_fastopen_request *fastopen_req;
/* fastopen_rsk points to request_sock that resulted in this big