Root/net/rds/iw_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 "iw.h"
38
39static struct ctl_table_header *rds_iw_sysctl_hdr;
40
41unsigned long rds_iw_sysctl_max_send_wr = RDS_IW_DEFAULT_SEND_WR;
42unsigned long rds_iw_sysctl_max_recv_wr = RDS_IW_DEFAULT_RECV_WR;
43unsigned long rds_iw_sysctl_max_recv_allocation = (128 * 1024 * 1024) / RDS_FRAG_SIZE;
44static unsigned long rds_iw_sysctl_max_wr_min = 1;
45/* hardware will fail CQ creation long before this */
46static unsigned long rds_iw_sysctl_max_wr_max = (u32)~0;
47
48unsigned long rds_iw_sysctl_max_unsig_wrs = 16;
49static unsigned long rds_iw_sysctl_max_unsig_wr_min = 1;
50static unsigned long rds_iw_sysctl_max_unsig_wr_max = 64;
51
52unsigned long rds_iw_sysctl_max_unsig_bytes = (16 << 20);
53static unsigned long rds_iw_sysctl_max_unsig_bytes_min = 1;
54static unsigned long rds_iw_sysctl_max_unsig_bytes_max = ~0UL;
55
56unsigned int rds_iw_sysctl_flow_control = 1;
57
58ctl_table rds_iw_sysctl_table[] = {
59    {
60        .procname = "max_send_wr",
61        .data = &rds_iw_sysctl_max_send_wr,
62        .maxlen = sizeof(unsigned long),
63        .mode = 0644,
64        .proc_handler = proc_doulongvec_minmax,
65        .extra1 = &rds_iw_sysctl_max_wr_min,
66        .extra2 = &rds_iw_sysctl_max_wr_max,
67    },
68    {
69        .procname = "max_recv_wr",
70        .data = &rds_iw_sysctl_max_recv_wr,
71        .maxlen = sizeof(unsigned long),
72        .mode = 0644,
73        .proc_handler = proc_doulongvec_minmax,
74        .extra1 = &rds_iw_sysctl_max_wr_min,
75        .extra2 = &rds_iw_sysctl_max_wr_max,
76    },
77    {
78        .procname = "max_unsignaled_wr",
79        .data = &rds_iw_sysctl_max_unsig_wrs,
80        .maxlen = sizeof(unsigned long),
81        .mode = 0644,
82        .proc_handler = proc_doulongvec_minmax,
83        .extra1 = &rds_iw_sysctl_max_unsig_wr_min,
84        .extra2 = &rds_iw_sysctl_max_unsig_wr_max,
85    },
86    {
87        .procname = "max_unsignaled_bytes",
88        .data = &rds_iw_sysctl_max_unsig_bytes,
89        .maxlen = sizeof(unsigned long),
90        .mode = 0644,
91        .proc_handler = proc_doulongvec_minmax,
92        .extra1 = &rds_iw_sysctl_max_unsig_bytes_min,
93        .extra2 = &rds_iw_sysctl_max_unsig_bytes_max,
94    },
95    {
96        .procname = "max_recv_allocation",
97        .data = &rds_iw_sysctl_max_recv_allocation,
98        .maxlen = sizeof(unsigned long),
99        .mode = 0644,
100        .proc_handler = proc_doulongvec_minmax,
101    },
102    {
103        .procname = "flow_control",
104        .data = &rds_iw_sysctl_flow_control,
105        .maxlen = sizeof(rds_iw_sysctl_flow_control),
106        .mode = 0644,
107        .proc_handler = proc_dointvec,
108    },
109    { }
110};
111
112static struct ctl_path rds_iw_sysctl_path[] = {
113    { .procname = "net", },
114    { .procname = "rds", },
115    { .procname = "iw", },
116    { }
117};
118
119void rds_iw_sysctl_exit(void)
120{
121    if (rds_iw_sysctl_hdr)
122        unregister_sysctl_table(rds_iw_sysctl_hdr);
123}
124
125int __init rds_iw_sysctl_init(void)
126{
127    rds_iw_sysctl_hdr = register_sysctl_paths(rds_iw_sysctl_path, rds_iw_sysctl_table);
128    if (rds_iw_sysctl_hdr == NULL)
129        return -ENOMEM;
130    return 0;
131}
132

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