Eric Lee / smarc-fsl-linux-kernel

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Commit 3e5048495c8569bfdd552750e0315973c61e7c93

Authored by Andy Grover
Committed by David S. Miller
1 parent 13796bf9ed

RDS: sysctls 

RDS exposes a few tunable parameters via sysctls.

Signed-off-by: Andy Grover <andy.grover@oracle.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

Showing 1 changed file with 122 additions and 0 deletions Side-by-side Diff

  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 + .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 +
  100 +static struct ctl_path rds_sysctl_path[] = {
  101 + { .procname = "net", .ctl_name = CTL_NET, },
  102 + { .procname = "rds", .ctl_name = CTL_UNNUMBERED, },
  103 + { }
  104 +};
  105 +
  106 +
  107 +void rds_sysctl_exit(void)
  108 +{
  109 + if (rds_sysctl_reg_table)
  110 + unregister_sysctl_table(rds_sysctl_reg_table);
  111 +}
  112 +
  113 +int __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 +}