// SPDX-License-Identifier: GPL-2.0-or-later/* sysctls for configuring RxRPC operating parameters * * Copyright (C) 2014 Red Hat, Inc. All Rights Reserved. * Written by David Howells (dhowells@redhat.com) */ #include <linux/sysctl.h>#include <net/sock.h>#include <net/af_rxrpc.h>#include "ar-internal.h" static struct ctl_table_header *rxrpc_sysctl_reg_table;static const unsigned int rxrpc_rx_mtu_min = 500;static const unsigned int rxrpc_jumbo_max = RXRPC_MAX_NR_JUMBO;static const unsigned int four = 4;static const unsigned int max_backlog = RXRPC_BACKLOG_MAX - 1;static const unsigned int n_65535 = 65535;static const unsigned int n_max_acks = 255;static const unsigned long one_ms = 1;static const unsigned long max_ms = 1000;static const unsigned long one_jiffy = 1;static const unsigned long max_jiffies = MAX_JIFFY_OFFSET;#ifdef CONFIG_AF_RXRPC_INJECT_RX_DELAYstatic const unsigned long max_500 = 500;#endif /* * RxRPC operating parameters. * * See Documentation/networking/rxrpc.rst and the variable definitions for more * information on the individual parameters. */static struct ctl_table rxrpc_sysctl_table[] = {	/* Values measured in milliseconds */	{		.procname	= "soft_ack_delay",		.data		= &rxrpc_soft_ack_delay,		.maxlen		= sizeof(unsigned long),		.mode		= 0644,		.proc_handler	= proc_doulongvec_minmax,		.extra1		= (void *)&one_ms,		.extra2		= (void *)&max_ms,	},	{		.procname	= "idle_ack_delay",		.data		= &rxrpc_idle_ack_delay,		.maxlen		= sizeof(unsigned long),		.mode		= 0644,		.proc_handler	= proc_doulongvec_minmax,		.extra1		= (void *)&one_ms,		.extra2		= (void *)&max_ms,	},	{		.procname	= "idle_conn_expiry",		.data		= &rxrpc_conn_idle_client_expiry,		.maxlen		= sizeof(unsigned long),		.mode		= 0644,		.proc_handler	= proc_doulongvec_ms_jiffies_minmax,		.extra1		= (void *)&one_jiffy,		.extra2		= (void *)&max_jiffies,	},	{		.procname	= "idle_conn_fast_expiry",		.data		= &rxrpc_conn_idle_client_fast_expiry,		.maxlen		= sizeof(unsigned long),		.mode		= 0644,		.proc_handler	= proc_doulongvec_ms_jiffies_minmax,		.extra1		= (void *)&one_jiffy,		.extra2		= (void *)&max_jiffies,	}, 	/* Values used in milliseconds */#ifdef CONFIG_AF_RXRPC_INJECT_RX_DELAY	{		.procname	= "inject_rx_delay",		.data		= &rxrpc_inject_rx_delay,		.maxlen		= sizeof(unsigned long),		.mode		= 0644,		.proc_handler	= proc_doulongvec_minmax,		.extra1		= (void *)SYSCTL_LONG_ZERO,		.extra2		= (void *)&max_500,	},#endif 	/* Non-time values */	{		.procname	= "reap_client_conns",		.data		= &rxrpc_reap_client_connections,		.maxlen		= sizeof(unsigned int),		.mode		= 0644,		.proc_handler	= proc_dointvec_minmax,		.extra1		= (void *)SYSCTL_ONE,		.extra2		= (void *)&n_65535,	},	{		.procname	= "max_backlog",		.data		= &rxrpc_max_backlog,		.maxlen		= sizeof(unsigned int),		.mode		= 0644,		.proc_handler	= proc_dointvec_minmax,		.extra1		= (void *)&four,		.extra2		= (void *)&max_backlog,	},	{		.procname	= "rx_window_size",		.data		= &rxrpc_rx_window_size,		.maxlen		= sizeof(unsigned int),		.mode		= 0644,		.proc_handler	= proc_dointvec_minmax,		.extra1		= (void *)SYSCTL_ONE,		.extra2		= (void *)&n_max_acks,	},	{		.procname	= "rx_mtu",		.data		= &rxrpc_rx_mtu,		.maxlen		= sizeof(unsigned int),		.mode		= 0644,		.proc_handler	= proc_dointvec_minmax,		.extra1		= (void *)&rxrpc_rx_mtu_min,		.extra2		= (void *)&n_65535,	},	{		.procname	= "rx_jumbo_max",		.data		= &rxrpc_rx_jumbo_max,		.maxlen		= sizeof(unsigned int),		.mode		= 0644,		.proc_handler	= proc_dointvec_minmax,		.extra1		= (void *)SYSCTL_ONE,		.extra2		= (void *)&rxrpc_jumbo_max,	},}; int __init rxrpc_sysctl_init(void){	rxrpc_sysctl_reg_table = register_net_sysctl(&init_net, "net/rxrpc",						     rxrpc_sysctl_table);	if (!rxrpc_sysctl_reg_table)		return -ENOMEM;	return 0;} void rxrpc_sysctl_exit(void){	if (rxrpc_sysctl_reg_table)		unregister_net_sysctl_table(rxrpc_sysctl_reg_table);}