net/rxrpc/sysctl.c

   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
  13 static struct ctl_table_header *rxrpc_sysctl_reg_table;
  14 static const unsigned int one = 1;
  15 static const unsigned int four = 4;
  16 static const unsigned int thirtytwo = 32;
  17 static const unsigned int n_65535 = 65535;
  18 static const unsigned int n_max_acks = RXRPC_RXTX_BUFF_SIZE - 1;
  19 static const unsigned long one_jiffy = 1;
  20 static const unsigned long max_jiffies = MAX_JIFFY_OFFSET;
  21
  22 /*
  23  * RxRPC operating parameters.
  24  *
  25  * See Documentation/networking/rxrpc.txt and the variable definitions for more
  26  * information on the individual parameters.
  27  */
  28 static struct ctl_table rxrpc_sysctl_table[] = {
  29         /* Values measured in milliseconds but used in jiffies */
  30         {
  31                 .procname       = "req_ack_delay",
  32                 .data           = &rxrpc_requested_ack_delay,
  33                 .maxlen         = sizeof(unsigned long),
  34                 .mode           = 0644,
  35                 .proc_handler   = proc_doulongvec_ms_jiffies_minmax,
  36                 .extra1         = (void *)&one_jiffy,
  37                 .extra2         = (void *)&max_jiffies,
  38         },
  39         {
  40                 .procname       = "soft_ack_delay",
  41                 .data           = &rxrpc_soft_ack_delay,
  42                 .maxlen         = sizeof(unsigned long),
  43                 .mode           = 0644,
  44                 .proc_handler   = proc_doulongvec_ms_jiffies_minmax,
  45                 .extra1         = (void *)&one_jiffy,
  46                 .extra2         = (void *)&max_jiffies,
  47         },
  48         {
  49                 .procname       = "idle_ack_delay",
  50                 .data           = &rxrpc_idle_ack_delay,
  51                 .maxlen         = sizeof(unsigned long),
  52                 .mode           = 0644,
  53                 .proc_handler   = proc_doulongvec_ms_jiffies_minmax,
  54                 .extra1         = (void *)&one_jiffy,
  55                 .extra2         = (void *)&max_jiffies,
  56         },
  57         {
  58                 .procname       = "idle_conn_expiry",
  59                 .data           = &rxrpc_conn_idle_client_expiry,
  60                 .maxlen         = sizeof(unsigned long),
  61                 .mode           = 0644,
  62                 .proc_handler   = proc_doulongvec_ms_jiffies_minmax,
  63                 .extra1         = (void *)&one_jiffy,
  64                 .extra2         = (void *)&max_jiffies,
  65         },
  66         {
  67                 .procname       = "idle_conn_fast_expiry",
  68                 .data           = &rxrpc_conn_idle_client_fast_expiry,
  69                 .maxlen         = sizeof(unsigned long),
  70                 .mode           = 0644,
  71                 .proc_handler   = proc_doulongvec_ms_jiffies_minmax,
  72                 .extra1         = (void *)&one_jiffy,
  73                 .extra2         = (void *)&max_jiffies,
  74         },
  75         {
  76                 .procname       = "resend_timeout",
  77                 .data           = &rxrpc_resend_timeout,
  78                 .maxlen         = sizeof(unsigned long),
  79                 .mode           = 0644,
  80                 .proc_handler   = proc_doulongvec_ms_jiffies_minmax,
  81                 .extra1         = (void *)&one_jiffy,
  82                 .extra2         = (void *)&max_jiffies,
  83         },
  84
  85         /* Non-time values */
  86         {
  87                 .procname       = "max_client_conns",
  88                 .data           = &rxrpc_max_client_connections,
  89                 .maxlen         = sizeof(unsigned int),
  90                 .mode           = 0644,
  91                 .proc_handler   = proc_dointvec_minmax,
  92                 .extra1         = (void *)&rxrpc_reap_client_connections,
  93         },
  94         {
  95                 .procname       = "reap_client_conns",
  96                 .data           = &rxrpc_reap_client_connections,
  97                 .maxlen         = sizeof(unsigned int),
  98                 .mode           = 0644,
  99                 .proc_handler   = proc_dointvec_minmax,
 100                 .extra1         = (void *)&one,
 101                 .extra2         = (void *)&rxrpc_max_client_connections,
 102         },
 103         {
 104                 .procname       = "max_backlog",
 105                 .data           = &rxrpc_max_backlog,
 106                 .maxlen         = sizeof(unsigned int),
 107                 .mode           = 0644,
 108                 .proc_handler   = proc_dointvec_minmax,
 109                 .extra1         = (void *)&four,
 110                 .extra2         = (void *)&thirtytwo,
 111         },
 112         {
 113                 .procname       = "rx_window_size",
 114                 .data           = &rxrpc_rx_window_size,
 115                 .maxlen         = sizeof(unsigned int),
 116                 .mode           = 0644,
 117                 .proc_handler   = proc_dointvec_minmax,
 118                 .extra1         = (void *)&one,
 119                 .extra2         = (void *)&n_max_acks,
 120         },
 121         {
 122                 .procname       = "rx_mtu",
 123                 .data           = &rxrpc_rx_mtu,
 124                 .maxlen         = sizeof(unsigned int),
 125                 .mode           = 0644,
 126                 .proc_handler   = proc_dointvec_minmax,
 127                 .extra1         = (void *)&one,
 128                 .extra2         = (void *)&n_65535,
 129         },
 130         {
 131                 .procname       = "rx_jumbo_max",
 132                 .data           = &rxrpc_rx_jumbo_max,
 133                 .maxlen         = sizeof(unsigned int),
 134                 .mode           = 0644,
 135                 .proc_handler   = proc_dointvec_minmax,
 136                 .extra1         = (void *)&one,
 137                 .extra2         = (void *)&four,
 138         },
 139
 140         { }
 141 };
 142
 143 int __init rxrpc_sysctl_init(void)
 144 {
 145         rxrpc_sysctl_reg_table = register_net_sysctl(&init_net, "net/rxrpc",
 146                                                      rxrpc_sysctl_table);
 147         if (!rxrpc_sysctl_reg_table)
 148                 return -ENOMEM;
 149         return 0;
 150 }
 151
 152 void rxrpc_sysctl_exit(void)
 153 {
 154         if (rxrpc_sysctl_reg_table)
 155                 unregister_net_sysctl_table(rxrpc_sysctl_reg_table);
 156 }