diff options
| author | Christoph Paasch <christoph.paasch@uclouvain.be> | 2013-03-17 08:23:34 +0000 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2013-03-17 14:35:13 -0400 |
| commit | 1a2c6181c4a1922021b4d7df373bba612c3e5f04 (patch) | |
| tree | 1346c9b1db83495a98fbcf95f8e521c67fc55cb9 /include/linux/tcp.h | |
| parent | 94d8f2b133c9ff97105adc1233d1a35e16e1e7a6 (diff) | |
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.h | 10 |
1 files changed, 0 insertions, 10 deletions
diff --git a/include/linux/tcp.h b/include/linux/tcp.h index 763c108ee03..ed6a7456eec 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 |