cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
Log | Files | Refs | README | LICENSE | sfeed.txt

sysctl.c (3706B)

      1// SPDX-License-Identifier: GPL-2.0-or-later
      2/* sysctls for configuring RxRPC operating parameters
      3 *
      4 * Copyright (C) 2014 Red Hat, Inc. All Rights Reserved.
      5 * Written by David Howells (dhowells@redhat.com)
      6 */
      7
      8#include <linux/sysctl.h>
      9#include <net/sock.h>
     10#include <net/af_rxrpc.h>
     11#include "ar-internal.h"
     12
     13static struct ctl_table_header *rxrpc_sysctl_reg_table;
     14static const unsigned int four = 4;
     15static const unsigned int max_backlog = RXRPC_BACKLOG_MAX - 1;
     16static const unsigned int n_65535 = 65535;
     17static const unsigned int n_max_acks = RXRPC_RXTX_BUFF_SIZE - 1;
     18static const unsigned long one_jiffy = 1;
     19static const unsigned long max_jiffies = MAX_JIFFY_OFFSET;
     20
     21/*
     22 * RxRPC operating parameters.
     23 *
     24 * See Documentation/networking/rxrpc.rst and the variable definitions for more
     25 * information on the individual parameters.
     26 */
     27static struct ctl_table rxrpc_sysctl_table[] = {
     28	/* Values measured in milliseconds but used in jiffies */
     29	{
     30		.procname	= "req_ack_delay",
     31		.data		= &rxrpc_requested_ack_delay,
     32		.maxlen		= sizeof(unsigned long),
     33		.mode		= 0644,
     34		.proc_handler	= proc_doulongvec_ms_jiffies_minmax,
     35		.extra1		= (void *)&one_jiffy,
     36		.extra2		= (void *)&max_jiffies,
     37	},
     38	{
     39		.procname	= "soft_ack_delay",
     40		.data		= &rxrpc_soft_ack_delay,
     41		.maxlen		= sizeof(unsigned long),
     42		.mode		= 0644,
     43		.proc_handler	= proc_doulongvec_ms_jiffies_minmax,
     44		.extra1		= (void *)&one_jiffy,
     45		.extra2		= (void *)&max_jiffies,
     46	},
     47	{
     48		.procname	= "idle_ack_delay",
     49		.data		= &rxrpc_idle_ack_delay,
     50		.maxlen		= sizeof(unsigned long),
     51		.mode		= 0644,
     52		.proc_handler	= proc_doulongvec_ms_jiffies_minmax,
     53		.extra1		= (void *)&one_jiffy,
     54		.extra2		= (void *)&max_jiffies,
     55	},
     56	{
     57		.procname	= "idle_conn_expiry",
     58		.data		= &rxrpc_conn_idle_client_expiry,
     59		.maxlen		= sizeof(unsigned long),
     60		.mode		= 0644,
     61		.proc_handler	= proc_doulongvec_ms_jiffies_minmax,
     62		.extra1		= (void *)&one_jiffy,
     63		.extra2		= (void *)&max_jiffies,
     64	},
     65	{
     66		.procname	= "idle_conn_fast_expiry",
     67		.data		= &rxrpc_conn_idle_client_fast_expiry,
     68		.maxlen		= sizeof(unsigned long),
     69		.mode		= 0644,
     70		.proc_handler	= proc_doulongvec_ms_jiffies_minmax,
     71		.extra1		= (void *)&one_jiffy,
     72		.extra2		= (void *)&max_jiffies,
     73	},
     74
     75	/* Non-time values */
     76	{
     77		.procname	= "reap_client_conns",
     78		.data		= &rxrpc_reap_client_connections,
     79		.maxlen		= sizeof(unsigned int),
     80		.mode		= 0644,
     81		.proc_handler	= proc_dointvec_minmax,
     82		.extra1		= (void *)SYSCTL_ONE,
     83		.extra2		= (void *)&n_65535,
     84	},
     85	{
     86		.procname	= "max_backlog",
     87		.data		= &rxrpc_max_backlog,
     88		.maxlen		= sizeof(unsigned int),
     89		.mode		= 0644,
     90		.proc_handler	= proc_dointvec_minmax,
     91		.extra1		= (void *)&four,
     92		.extra2		= (void *)&max_backlog,
     93	},
     94	{
     95		.procname	= "rx_window_size",
     96		.data		= &rxrpc_rx_window_size,
     97		.maxlen		= sizeof(unsigned int),
     98		.mode		= 0644,
     99		.proc_handler	= proc_dointvec_minmax,
    100		.extra1		= (void *)SYSCTL_ONE,
    101		.extra2		= (void *)&n_max_acks,
    102	},
    103	{
    104		.procname	= "rx_mtu",
    105		.data		= &rxrpc_rx_mtu,
    106		.maxlen		= sizeof(unsigned int),
    107		.mode		= 0644,
    108		.proc_handler	= proc_dointvec_minmax,
    109		.extra1		= (void *)SYSCTL_ONE,
    110		.extra2		= (void *)&n_65535,
    111	},
    112	{
    113		.procname	= "rx_jumbo_max",
    114		.data		= &rxrpc_rx_jumbo_max,
    115		.maxlen		= sizeof(unsigned int),
    116		.mode		= 0644,
    117		.proc_handler	= proc_dointvec_minmax,
    118		.extra1		= (void *)SYSCTL_ONE,
    119		.extra2		= (void *)&four,
    120	},
    121
    122	{ }
    123};
    124
    125int __init rxrpc_sysctl_init(void)
    126{
    127	rxrpc_sysctl_reg_table = register_net_sysctl(&init_net, "net/rxrpc",
    128						     rxrpc_sysctl_table);
    129	if (!rxrpc_sysctl_reg_table)
    130		return -ENOMEM;
    131	return 0;
    132}
    133
    134void rxrpc_sysctl_exit(void)
    135{
    136	if (rxrpc_sysctl_reg_table)
    137		unregister_net_sysctl_table(rxrpc_sysctl_reg_table);
    138}