Root/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        .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
95static struct ctl_path rds_sysctl_path[] = {
96    { .procname = "net", },
97    { .procname = "rds", },
98    { }
99};
100
101
102void rds_sysctl_exit(void)
103{
104    if (rds_sysctl_reg_table)
105        unregister_sysctl_table(rds_sysctl_reg_table);
106}
107
108int __init 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 == NULL)
115        return -ENOMEM;
116    return 0;
117}
118

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