linux/net/rds/sysctl.c
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   1/*
   2 * Copyright (c) 2006 Oracle.  All rights reserved.
   3 *
   4 * This software is available to you under a choice of one of two
   5 * licenses.  You may choose to be licensed under the terms of the GNU
   6 * General Public License (GPL) Version 2, available from the file
   7 * COPYING in the main directory of this source tree, or the
   8 * OpenIB.org BSD license below:
   9 *
  10 *     Redistribution and use in source and binary forms, with or
  11 *     without modification, are permitted provided that the following
  12 *     conditions are met:
  13 *
  14 *      - Redistributions of source code must retain the above
  15 *        copyright notice, this list of conditions and the following
  16 *        disclaimer.
  17 *
  18 *      - Redistributions in binary form must reproduce the above
  19 *        copyright notice, this list of conditions and the following
  20 *        disclaimer in the documentation and/or other materials
  21 *        provided with the distribution.
  22 *
  23 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  24 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  25 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  26 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
  27 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
  28 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
  29 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  30 * SOFTWARE.
  31 *
  32 */
  33#include <linux/kernel.h>
  34#include <linux/sysctl.h>
  35#include <linux/proc_fs.h>
  36
  37#include "rds.h"
  38
  39static struct ctl_table_header *rds_sysctl_reg_table;
  40
  41static unsigned long rds_sysctl_reconnect_min = 1;
  42static unsigned long rds_sysctl_reconnect_max = ~0UL;
  43
  44unsigned long rds_sysctl_reconnect_min_jiffies;
  45unsigned long rds_sysctl_reconnect_max_jiffies = HZ;
  46
  47unsigned int  rds_sysctl_max_unacked_packets = 8;
  48unsigned int  rds_sysctl_max_unacked_bytes = (16 << 20);
  49
  50unsigned int rds_sysctl_ping_enable = 1;
  51
  52static ctl_table rds_sysctl_rds_table[] = {
  53        {
  54                .procname       = "reconnect_min_delay_ms",
  55                .data           = &rds_sysctl_reconnect_min_jiffies,
  56                .maxlen         = sizeof(unsigned long),
  57                .mode           = 0644,
  58                .proc_handler   = proc_doulongvec_ms_jiffies_minmax,
  59                .extra1         = &rds_sysctl_reconnect_min,
  60                .extra2         = &rds_sysctl_reconnect_max_jiffies,
  61        },
  62        {
  63                .procname       = "reconnect_max_delay_ms",
  64                .data           = &rds_sysctl_reconnect_max_jiffies,
  65                .maxlen         = sizeof(unsigned long),
  66                .mode           = 0644,
  67                .proc_handler   = proc_doulongvec_ms_jiffies_minmax,
  68                .extra1         = &rds_sysctl_reconnect_min_jiffies,
  69                .extra2         = &rds_sysctl_reconnect_max,
  70        },
  71        {
  72                .procname       = "max_unacked_packets",
  73                .data           = &rds_sysctl_max_unacked_packets,
  74                .maxlen         = sizeof(unsigned long),
  75                .mode           = 0644,
  76                .proc_handler   = proc_dointvec,
  77        },
  78        {
  79                .procname       = "max_unacked_bytes",
  80                .data           = &rds_sysctl_max_unacked_bytes,
  81                .maxlen         = sizeof(unsigned long),
  82                .mode           = 0644,
  83                .proc_handler   = proc_dointvec,
  84        },
  85        {
  86                .procname       = "ping_enable",
  87                .data           = &rds_sysctl_ping_enable,
  88                .maxlen         = sizeof(int),
  89                .mode           = 0644,
  90                .proc_handler   = proc_dointvec,
  91        },
  92        { }
  93};
  94
  95void rds_sysctl_exit(void)
  96{
  97        if (rds_sysctl_reg_table)
  98                unregister_net_sysctl_table(rds_sysctl_reg_table);
  99}
 100
 101int rds_sysctl_init(void)
 102{
 103        rds_sysctl_reconnect_min = msecs_to_jiffies(1);
 104        rds_sysctl_reconnect_min_jiffies = rds_sysctl_reconnect_min;
 105
 106        rds_sysctl_reg_table = register_net_sysctl(&init_net,"net/rds", rds_sysctl_rds_table);
 107        if (!rds_sysctl_reg_table)
 108                return -ENOMEM;
 109        return 0;
 110}
 111
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