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75e4212639
call->rx_winsize should be initialised to the sysctl setting and the sysctl setting should be limited to the maximum we want to permit. Further, we need to place this in the ACK info instead of the sysctl setting. Furthermore, discard the idea of accepting the subpackets of a jumbo packet that lie beyond the receive window when the first packet of the jumbo is within the window. Just discard the excess subpackets instead. This allows the receive window to be opened up right to the buffer size less one for the dead slot. Signed-off-by: David Howells <dhowells@redhat.com>
164 lines
4.2 KiB
C
164 lines
4.2 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 int zero = 0;
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static const unsigned int one = 1;
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static const unsigned int four = 4;
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static const unsigned int thirtytwo = 32;
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static const unsigned int n_65535 = 65535;
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static const unsigned int n_max_acks = RXRPC_RXTX_BUFF_SIZE - 1;
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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 int),
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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 int),
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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 int),
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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 int),
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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_conn_expiry",
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.data = &rxrpc_conn_idle_client_expiry,
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.maxlen = sizeof(unsigned int),
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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_conn_fast_expiry",
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.data = &rxrpc_conn_idle_client_fast_expiry,
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.maxlen = sizeof(unsigned int),
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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 int),
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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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/* Non-time values */
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{
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.procname = "max_client_conns",
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.data = &rxrpc_max_client_connections,
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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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.extra1 = (void *)&rxrpc_reap_client_connections,
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},
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{
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.procname = "reap_client_conns",
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.data = &rxrpc_reap_client_connections,
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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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.extra1 = (void *)&one,
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.extra2 = (void *)&rxrpc_max_client_connections,
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},
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{
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.procname = "max_backlog",
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.data = &rxrpc_max_backlog,
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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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.extra1 = (void *)&four,
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.extra2 = (void *)&thirtytwo,
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},
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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 int),
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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 int),
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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_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 int),
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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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