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 struct 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(int),
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(int),
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	unregister_net_sysctl_table(rds_sysctl_reg_table);
98}
99
100int rds_sysctl_init(void)
101{
102	rds_sysctl_reconnect_min = msecs_to_jiffies(1);
103	rds_sysctl_reconnect_min_jiffies = rds_sysctl_reconnect_min;
104
105	rds_sysctl_reg_table =
106		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