net/rxrpc/sysctl.c

   1 /* sysctls for configuring RxRPC operating parameters
   2  *
   3  * Copyright (C) 2014 Red Hat, Inc. All Rights Reserved.
   4  * Written by David Howells (dhowells@redhat.com)
   5  *
   6  * This program is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU General Public Licence
   8  * as published by the Free Software Foundation; either version
   9  * 2 of the Licence, or (at your option) any later version.
  10  */
  11
  12 #include <linux/sysctl.h>
  13 #include <net/sock.h>
  14 #include <net/af_rxrpc.h>
  15 #include "ar-internal.h"
  16
  17 static struct ctl_table_header *rxrpc_sysctl_reg_table;
  18 static const unsigned int one = 1;
  19 static const unsigned int four = 4;
  20 static const unsigned int max_backlog = RXRPC_BACKLOG_MAX - 1;
  21 static const unsigned int n_65535 = 65535;
  22 static const unsigned int n_max_acks = RXRPC_RXTX_BUFF_SIZE - 1;
  23 static const unsigned long one_jiffy = 1;
  24 static const unsigned long max_jiffies = MAX_JIFFY_OFFSET;
  25
  26 /*
  27  * RxRPC operating parameters.
  28  *
  29  * See Documentation/networking/rxrpc.txt and the variable definitions for more
  30  * information on the individual parameters.
  31  */
  32 static struct ctl_table rxrpc_sysctl_table[] = {
  33         /* Values measured in milliseconds but used in jiffies */
  34         {
  35                 .procname       = "req_ack_delay",
  36                 .data           = &rxrpc_requested_ack_delay,
  37                 .maxlen         = sizeof(unsigned long),
  38                 .mode           = 0644,
  39                 .proc_handler   = proc_doulongvec_ms_jiffies_minmax,
  40                 .extra1         = (void *)&one_jiffy,
  41                 .extra2         = (void *)&max_jiffies,
  42         },
  43         {
  44                 .procname       = "soft_ack_delay",
  45                 .data           = &rxrpc_soft_ack_delay,
  46                 .maxlen         = sizeof(unsigned long),
  47                 .mode           = 0644,
  48                 .proc_handler   = proc_doulongvec_ms_jiffies_minmax,
  49                 .extra1         = (void *)&one_jiffy,
  50                 .extra2         = (void *)&max_jiffies,
  51         },
  52         {
  53                 .procname       = "idle_ack_delay",
  54                 .data           = &rxrpc_idle_ack_delay,
  55                 .maxlen         = sizeof(unsigned long),
  56                 .mode           = 0644,
  57                 .proc_handler   = proc_doulongvec_ms_jiffies_minmax,
  58                 .extra1         = (void *)&one_jiffy,
  59                 .extra2         = (void *)&max_jiffies,
  60         },
  61         {
  62                 .procname       = "idle_conn_expiry",
  63                 .data           = &rxrpc_conn_idle_client_expiry,
  64                 .maxlen         = sizeof(unsigned long),
  65                 .mode           = 0644,
  66                 .proc_handler   = proc_doulongvec_ms_jiffies_minmax,
  67                 .extra1         = (void *)&one_jiffy,
  68                 .extra2         = (void *)&max_jiffies,
  69         },
  70         {
  71                 .procname       = "idle_conn_fast_expiry",
  72                 .data           = &rxrpc_conn_idle_client_fast_expiry,
  73                 .maxlen         = sizeof(unsigned long),
  74                 .mode           = 0644,
  75                 .proc_handler   = proc_doulongvec_ms_jiffies_minmax,
  76                 .extra1         = (void *)&one_jiffy,
  77                 .extra2         = (void *)&max_jiffies,
  78         },
  79         {
  80                 .procname       = "resend_timeout",
  81                 .data           = &rxrpc_resend_timeout,
  82                 .maxlen         = sizeof(unsigned long),
  83                 .mode           = 0644,
  84                 .proc_handler   = proc_doulongvec_ms_jiffies_minmax,
  85                 .extra1         = (void *)&one_jiffy,
  86                 .extra2         = (void *)&max_jiffies,
  87         },
  88
  89         /* Non-time values */
  90         {
  91                 .procname       = "max_client_conns",
  92                 .data           = &rxrpc_max_client_connections,
  93                 .maxlen         = sizeof(unsigned int),
  94                 .mode           = 0644,
  95                 .proc_handler   = proc_dointvec_minmax,
  96                 .extra1         = (void *)&rxrpc_reap_client_connections,
  97         },
  98         {
  99                 .procname       = "reap_client_conns",
 100                 .data           = &rxrpc_reap_client_connections,
 101                 .maxlen         = sizeof(unsigned int),
 102                 .mode           = 0644,
 103                 .proc_handler   = proc_dointvec_minmax,
 104                 .extra1         = (void *)&one,
 105                 .extra2         = (void *)&rxrpc_max_client_connections,
 106         },
 107         {
 108                 .procname       = "max_backlog",
 109                 .data           = &rxrpc_max_backlog,
 110                 .maxlen         = sizeof(unsigned int),
 111                 .mode           = 0644,
 112                 .proc_handler   = proc_dointvec_minmax,
 113                 .extra1         = (void *)&four,
 114                 .extra2         = (void *)&max_backlog,
 115         },
 116         {
 117                 .procname       = "rx_window_size",
 118                 .data           = &rxrpc_rx_window_size,
 119                 .maxlen         = sizeof(unsigned int),
 120                 .mode           = 0644,
 121                 .proc_handler   = proc_dointvec_minmax,
 122                 .extra1         = (void *)&one,
 123                 .extra2         = (void *)&n_max_acks,
 124         },
 125         {
 126                 .procname       = "rx_mtu",
 127                 .data           = &rxrpc_rx_mtu,
 128                 .maxlen         = sizeof(unsigned int),
 129                 .mode           = 0644,
 130                 .proc_handler   = proc_dointvec_minmax,
 131                 .extra1         = (void *)&one,
 132                 .extra2         = (void *)&n_65535,
 133         },
 134         {
 135                 .procname       = "rx_jumbo_max",
 136                 .data           = &rxrpc_rx_jumbo_max,
 137                 .maxlen         = sizeof(unsigned int),
 138                 .mode           = 0644,
 139                 .proc_handler   = proc_dointvec_minmax,
 140                 .extra1         = (void *)&one,
 141                 .extra2         = (void *)&four,
 142         },
 143
 144         { }
 145 };
 146
 147 int __init rxrpc_sysctl_init(void)
 148 {
 149         rxrpc_sysctl_reg_table = register_net_sysctl(&init_net, "net/rxrpc",
 150                                                      rxrpc_sysctl_table);
 151         if (!rxrpc_sysctl_reg_table)
 152                 return -ENOMEM;
 153         return 0;
 154 }
 155
 156 void rxrpc_sysctl_exit(void)
 157 {
 158         if (rxrpc_sysctl_reg_table)
 159                 unregister_net_sysctl_table(rxrpc_sysctl_reg_table);
 160 }