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
  39 static struct ctl_table_header *rds_sysctl_reg_table;
  40
  41 static unsigned long rds_sysctl_reconnect_min = 1;
  42 static unsigned long rds_sysctl_reconnect_max = ~0UL;
  43
  44 unsigned long rds_sysctl_reconnect_min_jiffies;
  45 unsigned long rds_sysctl_reconnect_max_jiffies = HZ;
  46
  47 unsigned int  rds_sysctl_max_unacked_packets = 8;
  48 unsigned int  rds_sysctl_max_unacked_bytes = (16 << 20);
  49
  50 unsigned int rds_sysctl_ping_enable = 1;
  51
  52 static 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
  95 static struct ctl_path rds_sysctl_path[] = {
  96         { .procname = "net", },
  97         { .procname = "rds", },
  98         { }
  99 };
 100
 101
 102 void rds_sysctl_exit(void)
 103 {
 104         if (rds_sysctl_reg_table)
 105                 unregister_sysctl_table(rds_sysctl_reg_table);
 106 }
 107
 108 int rds_sysctl_init(void)
 109 {
 110         rds_sysctl_reconnect_min = msecs_to_jiffies(1);
 111         rds_sysctl_reconnect_min_jiffies = rds_sysctl_reconnect_min;
 112
 113         rds_sysctl_reg_table = register_sysctl_paths(rds_sysctl_path, rds_sysctl_rds_table);
 114         if (!rds_sysctl_reg_table)
 115                 return -ENOMEM;
 116         return 0;
 117 }