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Expose RxRPC parameters via sysctls to control the Rx window size, the Rx MTU maximum size and the number of packets that can be glued into a jumbo packet. More info added to Documentation/networking/rxrpc.txt. Signed-off-by: David Howells <dhowells@redhat.com>
147 lines
3.6 KiB
C
147 lines
3.6 KiB
C
/* sysctls for configuring RxRPC operating parameters
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*
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* Copyright (C) 2014 Red Hat, Inc. All Rights Reserved.
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* Written by David Howells (dhowells@redhat.com)
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public Licence
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* as published by the Free Software Foundation; either version
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* 2 of the Licence, or (at your option) any later version.
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*/
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#include <linux/sysctl.h>
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#include <net/sock.h>
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#include <net/af_rxrpc.h>
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#include "ar-internal.h"
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static struct ctl_table_header *rxrpc_sysctl_reg_table;
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static const unsigned zero = 0;
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static const unsigned one = 1;
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static const unsigned four = 4;
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static const unsigned n_65535 = 65535;
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static const unsigned n_max_acks = RXRPC_MAXACKS;
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/*
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* RxRPC operating parameters.
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*
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* See Documentation/networking/rxrpc.txt and the variable definitions for more
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* information on the individual parameters.
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*/
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static struct ctl_table rxrpc_sysctl_table[] = {
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/* Values measured in milliseconds */
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{
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.procname = "req_ack_delay",
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.data = &rxrpc_requested_ack_delay,
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.maxlen = sizeof(unsigned),
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.mode = 0644,
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.proc_handler = proc_dointvec_ms_jiffies,
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.extra1 = (void *)&zero,
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},
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{
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.procname = "soft_ack_delay",
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.data = &rxrpc_soft_ack_delay,
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.maxlen = sizeof(unsigned),
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.mode = 0644,
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.proc_handler = proc_dointvec_ms_jiffies,
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.extra1 = (void *)&one,
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},
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{
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.procname = "idle_ack_delay",
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.data = &rxrpc_idle_ack_delay,
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.maxlen = sizeof(unsigned),
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.mode = 0644,
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.proc_handler = proc_dointvec_ms_jiffies,
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.extra1 = (void *)&one,
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},
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{
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.procname = "resend_timeout",
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.data = &rxrpc_resend_timeout,
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.maxlen = sizeof(unsigned),
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.mode = 0644,
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.proc_handler = proc_dointvec_ms_jiffies,
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.extra1 = (void *)&one,
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},
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/* Values measured in seconds but used in jiffies */
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{
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.procname = "max_call_lifetime",
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.data = &rxrpc_max_call_lifetime,
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.maxlen = sizeof(unsigned),
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.mode = 0644,
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.proc_handler = proc_dointvec_jiffies,
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.extra1 = (void *)&one,
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},
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{
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.procname = "dead_call_expiry",
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.data = &rxrpc_dead_call_expiry,
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.maxlen = sizeof(unsigned),
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.mode = 0644,
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.proc_handler = proc_dointvec_jiffies,
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.extra1 = (void *)&one,
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},
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/* Values measured in seconds */
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{
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.procname = "connection_expiry",
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.data = &rxrpc_connection_expiry,
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.maxlen = sizeof(unsigned),
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.mode = 0644,
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.proc_handler = proc_dointvec_minmax,
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.extra1 = (void *)&one,
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},
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{
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.procname = "transport_expiry",
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.data = &rxrpc_transport_expiry,
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.maxlen = sizeof(unsigned),
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.mode = 0644,
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.proc_handler = proc_dointvec_minmax,
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.extra1 = (void *)&one,
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},
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/* Non-time values */
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{
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.procname = "rx_window_size",
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.data = &rxrpc_rx_window_size,
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.maxlen = sizeof(unsigned),
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.mode = 0644,
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.proc_handler = proc_dointvec_minmax,
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.extra1 = (void *)&one,
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.extra2 = (void *)&n_max_acks,
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},
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{
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.procname = "rx_mtu",
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.data = &rxrpc_rx_mtu,
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.maxlen = sizeof(unsigned),
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.mode = 0644,
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.proc_handler = proc_dointvec_minmax,
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.extra1 = (void *)&one,
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.extra1 = (void *)&n_65535,
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},
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{
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.procname = "rx_jumbo_max",
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.data = &rxrpc_rx_jumbo_max,
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.maxlen = sizeof(unsigned),
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.mode = 0644,
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.proc_handler = proc_dointvec_minmax,
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.extra1 = (void *)&one,
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.extra2 = (void *)&four,
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},
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{ }
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};
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int __init rxrpc_sysctl_init(void)
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{
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rxrpc_sysctl_reg_table = register_net_sysctl(&init_net, "net/rxrpc",
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rxrpc_sysctl_table);
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if (!rxrpc_sysctl_reg_table)
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return -ENOMEM;
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return 0;
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}
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void rxrpc_sysctl_exit(void)
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{
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if (rxrpc_sysctl_reg_table)
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unregister_net_sysctl_table(rxrpc_sysctl_reg_table);
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}
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