4d93df0abd
This patch introduces autotuning to the sctp buffer management code similar to the TCP. The buffer space can be grown if the advertised receive window still has room. This might happen if small message sizes are used, which is common in telecom environmens. New tunables are introduced that provide limits to buffer growth and memory pressure is entered if to much buffer spaces is used. Signed-off-by: Neil Horman <nhorman@tuxdriver.com> Signed-off-by: Vlad Yasevich <vladislav.yasevich@hp.com> Signed-off-by: David S. Miller <davem@davemloft.net>
297 lines
7.4 KiB
C
297 lines
7.4 KiB
C
/* SCTP kernel reference Implementation
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* (C) Copyright IBM Corp. 2002, 2004
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* Copyright (c) 2002 Intel Corp.
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*
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* This file is part of the SCTP kernel reference Implementation
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*
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* Sysctl related interfaces for SCTP.
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*
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* The SCTP reference implementation is free software;
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* you can redistribute it and/or modify it under the terms of
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* the GNU General Public License as published by
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* the Free Software Foundation; either version 2, or (at your option)
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* any later version.
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*
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* The SCTP reference implementation is distributed in the hope that it
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* will be useful, but WITHOUT ANY WARRANTY; without even the implied
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* ************************
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* warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
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* See the GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with GNU CC; see the file COPYING. If not, write to
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* the Free Software Foundation, 59 Temple Place - Suite 330,
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* Boston, MA 02111-1307, USA.
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*
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* Please send any bug reports or fixes you make to the
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* email address(es):
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* lksctp developers <lksctp-developers@lists.sourceforge.net>
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*
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* Or submit a bug report through the following website:
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* http://www.sf.net/projects/lksctp
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*
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* Written or modified by:
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* Mingqin Liu <liuming@us.ibm.com>
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* Jon Grimm <jgrimm@us.ibm.com>
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* Ardelle Fan <ardelle.fan@intel.com>
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* Ryan Layer <rmlayer@us.ibm.com>
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* Sridhar Samudrala <sri@us.ibm.com>
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*
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* Any bugs reported given to us we will try to fix... any fixes shared will
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* be incorporated into the next SCTP release.
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*/
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#include <net/sctp/structs.h>
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#include <net/sctp/sctp.h>
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#include <linux/sysctl.h>
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static int zero = 0;
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static int one = 1;
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static int timer_max = 86400000; /* ms in one day */
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static int int_max = INT_MAX;
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static long sack_timer_min = 1;
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static long sack_timer_max = 500;
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int sysctl_sctp_mem[3];
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int sysctl_sctp_rmem[3];
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int sysctl_sctp_wmem[3];
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/*
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* per assoc memory limitationf for sends
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*/
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int sysctl_sctp_wmem[3];
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static ctl_table sctp_table[] = {
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{
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.ctl_name = NET_SCTP_RTO_INITIAL,
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.procname = "rto_initial",
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.data = &sctp_rto_initial,
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.maxlen = sizeof(unsigned int),
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.mode = 0644,
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.proc_handler = &proc_dointvec_minmax,
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.strategy = &sysctl_intvec,
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.extra1 = &one,
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.extra2 = &timer_max
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},
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{
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.ctl_name = NET_SCTP_RTO_MIN,
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.procname = "rto_min",
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.data = &sctp_rto_min,
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.maxlen = sizeof(unsigned int),
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.mode = 0644,
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.proc_handler = &proc_dointvec_minmax,
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.strategy = &sysctl_intvec,
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.extra1 = &one,
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.extra2 = &timer_max
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},
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{
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.ctl_name = NET_SCTP_RTO_MAX,
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.procname = "rto_max",
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.data = &sctp_rto_max,
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.maxlen = sizeof(unsigned int),
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.mode = 0644,
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.proc_handler = &proc_dointvec_minmax,
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.strategy = &sysctl_intvec,
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.extra1 = &one,
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.extra2 = &timer_max
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},
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{
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.ctl_name = NET_SCTP_VALID_COOKIE_LIFE,
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.procname = "valid_cookie_life",
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.data = &sctp_valid_cookie_life,
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.maxlen = sizeof(unsigned int),
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.mode = 0644,
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.proc_handler = &proc_dointvec_minmax,
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.strategy = &sysctl_intvec,
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.extra1 = &one,
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.extra2 = &timer_max
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},
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{
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.ctl_name = NET_SCTP_MAX_BURST,
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.procname = "max_burst",
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.data = &sctp_max_burst,
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.maxlen = sizeof(int),
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.mode = 0644,
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.proc_handler = &proc_dointvec_minmax,
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.strategy = &sysctl_intvec,
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.extra1 = &zero,
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.extra2 = &int_max
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},
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{
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.ctl_name = NET_SCTP_ASSOCIATION_MAX_RETRANS,
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.procname = "association_max_retrans",
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.data = &sctp_max_retrans_association,
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.maxlen = sizeof(int),
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.mode = 0644,
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.proc_handler = &proc_dointvec_minmax,
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.strategy = &sysctl_intvec,
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.extra1 = &one,
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.extra2 = &int_max
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},
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{
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.ctl_name = NET_SCTP_SNDBUF_POLICY,
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.procname = "sndbuf_policy",
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.data = &sctp_sndbuf_policy,
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.maxlen = sizeof(int),
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.mode = 0644,
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.proc_handler = &proc_dointvec,
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.strategy = &sysctl_intvec
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},
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{
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.ctl_name = NET_SCTP_RCVBUF_POLICY,
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.procname = "rcvbuf_policy",
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.data = &sctp_rcvbuf_policy,
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.maxlen = sizeof(int),
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.mode = 0644,
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.proc_handler = &proc_dointvec,
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.strategy = &sysctl_intvec
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},
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{
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.ctl_name = NET_SCTP_PATH_MAX_RETRANS,
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.procname = "path_max_retrans",
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.data = &sctp_max_retrans_path,
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.maxlen = sizeof(int),
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.mode = 0644,
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.proc_handler = &proc_dointvec_minmax,
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.strategy = &sysctl_intvec,
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.extra1 = &one,
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.extra2 = &int_max
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},
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{
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.ctl_name = NET_SCTP_MAX_INIT_RETRANSMITS,
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.procname = "max_init_retransmits",
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.data = &sctp_max_retrans_init,
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.maxlen = sizeof(int),
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.mode = 0644,
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.proc_handler = &proc_dointvec_minmax,
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.strategy = &sysctl_intvec,
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.extra1 = &one,
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.extra2 = &int_max
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},
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{
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.ctl_name = NET_SCTP_HB_INTERVAL,
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.procname = "hb_interval",
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.data = &sctp_hb_interval,
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.maxlen = sizeof(unsigned int),
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.mode = 0644,
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.proc_handler = &proc_dointvec_minmax,
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.strategy = &sysctl_intvec,
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.extra1 = &one,
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.extra2 = &timer_max
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},
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{
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.ctl_name = NET_SCTP_PRESERVE_ENABLE,
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.procname = "cookie_preserve_enable",
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.data = &sctp_cookie_preserve_enable,
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.maxlen = sizeof(int),
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.mode = 0644,
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.proc_handler = &proc_dointvec,
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.strategy = &sysctl_intvec
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},
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{
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.ctl_name = NET_SCTP_RTO_ALPHA,
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.procname = "rto_alpha_exp_divisor",
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.data = &sctp_rto_alpha,
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.maxlen = sizeof(int),
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.mode = 0444,
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.proc_handler = &proc_dointvec,
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.strategy = &sysctl_intvec
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},
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{
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.ctl_name = NET_SCTP_RTO_BETA,
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.procname = "rto_beta_exp_divisor",
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.data = &sctp_rto_beta,
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.maxlen = sizeof(int),
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.mode = 0444,
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.proc_handler = &proc_dointvec,
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.strategy = &sysctl_intvec
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},
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{
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.ctl_name = NET_SCTP_ADDIP_ENABLE,
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.procname = "addip_enable",
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.data = &sctp_addip_enable,
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.maxlen = sizeof(int),
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.mode = 0644,
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.proc_handler = &proc_dointvec,
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.strategy = &sysctl_intvec
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},
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{
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.ctl_name = NET_SCTP_PRSCTP_ENABLE,
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.procname = "prsctp_enable",
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.data = &sctp_prsctp_enable,
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.maxlen = sizeof(int),
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.mode = 0644,
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.proc_handler = &proc_dointvec,
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.strategy = &sysctl_intvec
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},
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{
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.ctl_name = NET_SCTP_SACK_TIMEOUT,
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.procname = "sack_timeout",
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.data = &sctp_sack_timeout,
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.maxlen = sizeof(long),
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.mode = 0644,
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.proc_handler = &proc_dointvec_minmax,
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.strategy = &sysctl_intvec,
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.extra1 = &sack_timer_min,
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.extra2 = &sack_timer_max,
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},
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{
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.ctl_name = CTL_UNNUMBERED,
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.procname = "sctp_mem",
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.data = &sysctl_sctp_mem,
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.maxlen = sizeof(sysctl_sctp_mem),
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.mode = 0644,
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.proc_handler = &proc_dointvec,
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},
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{
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.ctl_name = CTL_UNNUMBERED,
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.procname = "sctp_rmem",
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.data = &sysctl_sctp_rmem,
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.maxlen = sizeof(sysctl_sctp_rmem),
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.mode = 0644,
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.proc_handler = &proc_dointvec,
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},
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{
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.ctl_name = CTL_UNNUMBERED,
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.procname = "sctp_wmem",
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.data = &sysctl_sctp_wmem,
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.maxlen = sizeof(sysctl_sctp_wmem),
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.mode = 0644,
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.proc_handler = &proc_dointvec,
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},
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{ .ctl_name = 0 }
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};
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static ctl_table sctp_net_table[] = {
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{
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.ctl_name = NET_SCTP,
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.procname = "sctp",
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.mode = 0555,
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.child = sctp_table
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},
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{ .ctl_name = 0 }
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};
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static ctl_table sctp_root_table[] = {
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{
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.ctl_name = CTL_NET,
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.procname = "net",
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.mode = 0555,
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.child = sctp_net_table
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},
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{ .ctl_name = 0 }
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};
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static struct ctl_table_header * sctp_sysctl_header;
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/* Sysctl registration. */
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void sctp_sysctl_register(void)
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{
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sctp_sysctl_header = register_sysctl_table(sctp_root_table);
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}
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/* Sysctl deregistration. */
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void sctp_sysctl_unregister(void)
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{
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unregister_sysctl_table(sctp_sysctl_header);
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}
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