mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2025-01-14 09:25:12 +00:00
07978aabd5
Allocate more sequence state on demand. Each time a packet is sent out by CCID2, a record of it needs to be kept. This list of records grows proportionally to cwnd. Previously, the length of this list was hardcored and therefore the cwnd could only grow to this value (of 128). Now, records are allocated on demand as necessary---cwnd may grow as it wishes. The exceptional case of when memory is not available is not handled gracefully. Perhaps, cwnd should be capped at that point. Signed-off-by: Andrea Bittau <a.bittau@cs.ucl.ac.uk> Signed-off-by: Arnaldo Carvalho de Melo <acme@mandriva.com> Signed-off-by: David S. Miller <davem@davemloft.net>
90 lines
2.5 KiB
C
90 lines
2.5 KiB
C
/*
|
|
* net/dccp/ccids/ccid2.h
|
|
*
|
|
* Copyright (c) 2005 Andrea Bittau <a.bittau@cs.ucl.ac.uk>
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License as published by
|
|
* the Free Software Foundation; either version 2 of the License, or
|
|
* (at your option) any later version.
|
|
*
|
|
* This program is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with this program; if not, write to the Free Software
|
|
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
|
|
*/
|
|
#ifndef _DCCP_CCID2_H_
|
|
#define _DCCP_CCID2_H_
|
|
|
|
#include <linux/dccp.h>
|
|
#include <linux/timer.h>
|
|
#include <linux/types.h>
|
|
#include "../ccid.h"
|
|
|
|
struct sock;
|
|
|
|
struct ccid2_seq {
|
|
u64 ccid2s_seq;
|
|
unsigned long ccid2s_sent;
|
|
int ccid2s_acked;
|
|
struct ccid2_seq *ccid2s_prev;
|
|
struct ccid2_seq *ccid2s_next;
|
|
};
|
|
|
|
#define CCID2_SEQBUF_LEN 256
|
|
#define CCID2_SEQBUF_MAX 128
|
|
|
|
/** struct ccid2_hc_tx_sock - CCID2 TX half connection
|
|
*
|
|
* @ccid2hctx_ssacks - ACKs recv in slow start
|
|
* @ccid2hctx_acks - ACKS recv in AI phase
|
|
* @ccid2hctx_sent - packets sent in this window
|
|
* @ccid2hctx_lastrtt -time RTT was last measured
|
|
* @ccid2hctx_arsent - packets sent [ack ratio]
|
|
* @ccid2hctx_ackloss - ack was lost in this win
|
|
* @ccid2hctx_rpseq - last consecutive seqno
|
|
* @ccid2hctx_rpdupack - dupacks since rpseq
|
|
*/
|
|
struct ccid2_hc_tx_sock {
|
|
int ccid2hctx_cwnd;
|
|
int ccid2hctx_ssacks;
|
|
int ccid2hctx_acks;
|
|
unsigned int ccid2hctx_ssthresh;
|
|
int ccid2hctx_pipe;
|
|
int ccid2hctx_numdupack;
|
|
struct ccid2_seq *ccid2hctx_seqbuf[CCID2_SEQBUF_MAX];
|
|
int ccid2hctx_seqbufc;
|
|
struct ccid2_seq *ccid2hctx_seqh;
|
|
struct ccid2_seq *ccid2hctx_seqt;
|
|
long ccid2hctx_rto;
|
|
long ccid2hctx_srtt;
|
|
long ccid2hctx_rttvar;
|
|
int ccid2hctx_sent;
|
|
unsigned long ccid2hctx_lastrtt;
|
|
struct timer_list ccid2hctx_rtotimer;
|
|
unsigned long ccid2hctx_arsent;
|
|
int ccid2hctx_ackloss;
|
|
u64 ccid2hctx_rpseq;
|
|
int ccid2hctx_rpdupack;
|
|
int ccid2hctx_sendwait;
|
|
};
|
|
|
|
struct ccid2_hc_rx_sock {
|
|
int ccid2hcrx_data;
|
|
};
|
|
|
|
static inline struct ccid2_hc_tx_sock *ccid2_hc_tx_sk(const struct sock *sk)
|
|
{
|
|
return ccid_priv(dccp_sk(sk)->dccps_hc_tx_ccid);
|
|
}
|
|
|
|
static inline struct ccid2_hc_rx_sock *ccid2_hc_rx_sk(const struct sock *sk)
|
|
{
|
|
return ccid_priv(dccp_sk(sk)->dccps_hc_rx_ccid);
|
|
}
|
|
#endif /* _DCCP_CCID2_H_ */
|