net/rxrpc/sysctl.c

Source file repositories/reference/linux-study-clean/net/rxrpc/sysctl.c

File Facts

System
Linux kernel
Corpus path
net/rxrpc/sysctl.c
Extension
.c
Size
3993 bytes
Lines
148
Domain
Networking Core
Bucket
Sockets, Protocols, Packet Path, And Network Policy
Inferred role
Networking Core: implementation source
Status
source implementation candidate

Why This File Exists

Networking stack implementation surface: socket APIs, protocol dispatch, packet flow, routing, filtering, and network namespaces.

Dependency Surface

Detected Declarations

Annotated Snippet

// 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_DELAY
static 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),

Annotation

Implementation Notes