LXR linux/net/rds/sysctl.c

   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                .ctl_name       = CTL_UNNUMBERED,
  55                .procname       = "reconnect_min_delay_ms",
  56                .data           = &rds_sysctl_reconnect_min_jiffies,
  57                .maxlen         = sizeof(unsigned long),
  58                .mode           = 0644,
  59                .proc_handler   = &proc_doulongvec_ms_jiffies_minmax,
  60                .extra1         = &rds_sysctl_reconnect_min,
  61                .extra2         = &rds_sysctl_reconnect_max_jiffies,
  62        },
  63        {
  64                .ctl_name       = CTL_UNNUMBERED,
  65                .procname       = "reconnect_max_delay_ms",
  66                .data           = &rds_sysctl_reconnect_max_jiffies,
  67                .maxlen         = sizeof(unsigned long),
  68                .mode           = 0644,
  69                .proc_handler   = &proc_doulongvec_ms_jiffies_minmax,
  70                .extra1         = &rds_sysctl_reconnect_min_jiffies,
  71                .extra2         = &rds_sysctl_reconnect_max,
  72        },
  73        {
  74                .ctl_name       = CTL_UNNUMBERED,
  75                .procname       = "max_unacked_packets",
  76                .data           = &rds_sysctl_max_unacked_packets,
  77                .maxlen         = sizeof(unsigned long),
  78                .mode           = 0644,
  79                .proc_handler   = &proc_dointvec,
  80        },
  81        {
  82                .ctl_name       = CTL_UNNUMBERED,
  83                .procname       = "max_unacked_bytes",
  84                .data           = &rds_sysctl_max_unacked_bytes,
  85                .maxlen         = sizeof(unsigned long),
  86                .mode           = 0644,
  87                .proc_handler   = &proc_dointvec,
  88        },
  89        {
  90                .ctl_name       = CTL_UNNUMBERED,
  91                .procname       = "ping_enable",
  92                .data           = &rds_sysctl_ping_enable,
  93                .maxlen         = sizeof(int),
  94                .mode           = 0644,
  95                .proc_handler   = &proc_dointvec,
  96        },
  97        { .ctl_name = 0}
  98};
  99
 100static struct ctl_path rds_sysctl_path[] = {
 101        { .procname = "net", .ctl_name = CTL_NET, },
 102        { .procname = "rds", .ctl_name = CTL_UNNUMBERED, },
 103        { }
 104};
 105
 106
 107void rds_sysctl_exit(void)
 108{
 109        if (rds_sysctl_reg_table)
 110                unregister_sysctl_table(rds_sysctl_reg_table);
 111}
 112
 113int __init rds_sysctl_init(void)
 114{
 115        rds_sysctl_reconnect_min = msecs_to_jiffies(1);
 116        rds_sysctl_reconnect_min_jiffies = rds_sysctl_reconnect_min;
 117
 118        rds_sysctl_reg_table = register_sysctl_paths(rds_sysctl_path, rds_sysctl_rds_table);
 119        if (rds_sysctl_reg_table == NULL)
 120                return -ENOMEM;
 121        return 0;
 122}
 123