[DCCP]: Add sysctls to control retransmission behaviour
[linux-2.6.git] / net / dccp / sysctl.c
1 /*
2  *  net/dccp/sysctl.c
3  *
4  *  An implementation of the DCCP protocol
5  *  Arnaldo Carvalho de Melo <acme@mandriva.com>
6  *
7  *      This program is free software; you can redistribute it and/or
8  *      modify it under the terms of the GNU General Public License v2
9  *      as published by the Free Software Foundation.
10  */
11
12 #include <linux/mm.h>
13 #include <linux/sysctl.h>
14 #include "dccp.h"
15 #include "feat.h"
16
17 #ifndef CONFIG_SYSCTL
18 #error This file should not be compiled without CONFIG_SYSCTL defined
19 #endif
20
21 static struct ctl_table dccp_default_table[] = {
22         {
23                 .ctl_name       = NET_DCCP_DEFAULT_SEQ_WINDOW,
24                 .procname       = "seq_window",
25                 .data           = &dccp_feat_default_sequence_window,
26                 .maxlen         = sizeof(dccp_feat_default_sequence_window),
27                 .mode           = 0644,
28                 .proc_handler   = proc_dointvec,
29         },
30         {
31                 .ctl_name       = NET_DCCP_DEFAULT_RX_CCID,
32                 .procname       = "rx_ccid",
33                 .data           = &dccp_feat_default_rx_ccid,
34                 .maxlen         = sizeof(dccp_feat_default_rx_ccid),
35                 .mode           = 0644,
36                 .proc_handler   = proc_dointvec,
37         },
38         {
39                 .ctl_name       = NET_DCCP_DEFAULT_TX_CCID,
40                 .procname       = "tx_ccid",
41                 .data           = &dccp_feat_default_tx_ccid,
42                 .maxlen         = sizeof(dccp_feat_default_tx_ccid),
43                 .mode           = 0644,
44                 .proc_handler   = proc_dointvec,
45         },
46         {
47                 .ctl_name       = NET_DCCP_DEFAULT_ACK_RATIO,
48                 .procname       = "ack_ratio",
49                 .data           = &dccp_feat_default_ack_ratio,
50                 .maxlen         = sizeof(dccp_feat_default_ack_ratio),
51                 .mode           = 0644,
52                 .proc_handler   = proc_dointvec,
53         },
54         {
55                 .ctl_name       = NET_DCCP_DEFAULT_SEND_ACKVEC,
56                 .procname       = "send_ackvec",
57                 .data           = &dccp_feat_default_send_ack_vector,
58                 .maxlen         = sizeof(dccp_feat_default_send_ack_vector),
59                 .mode           = 0644,
60                 .proc_handler   = proc_dointvec,
61         },
62         {
63                 .ctl_name       = NET_DCCP_DEFAULT_SEND_NDP,
64                 .procname       = "send_ndp",
65                 .data           = &dccp_feat_default_send_ndp_count,
66                 .maxlen         = sizeof(dccp_feat_default_send_ndp_count),
67                 .mode           = 0644,
68                 .proc_handler   = proc_dointvec,
69         },
70         {
71                 .ctl_name       = NET_DCCP_DEFAULT_REQ_RETRIES,
72                 .procname       = "request_retries",
73                 .data           = &sysctl_dccp_request_retries,
74                 .maxlen         = sizeof(sysctl_dccp_request_retries),
75                 .mode           = 0644,
76                 .proc_handler   = proc_dointvec,
77         },
78         {
79                 .ctl_name       = NET_DCCP_DEFAULT_RETRIES1,
80                 .procname       = "retries1",
81                 .data           = &sysctl_dccp_retries1,
82                 .maxlen         = sizeof(sysctl_dccp_retries1),
83                 .mode           = 0644,
84                 .proc_handler   = proc_dointvec,
85         },
86         {
87                 .ctl_name       = NET_DCCP_DEFAULT_RETRIES2,
88                 .procname       = "retries2",
89                 .data           = &sysctl_dccp_retries2,
90                 .maxlen         = sizeof(sysctl_dccp_retries2),
91                 .mode           = 0644,
92                 .proc_handler   = proc_dointvec,
93         },
94         { .ctl_name = 0, }
95 };
96
97 static struct ctl_table dccp_table[] = {
98         {
99                 .ctl_name       = NET_DCCP_DEFAULT,
100                 .procname       = "default",
101                 .mode           = 0555,
102                 .child          = dccp_default_table,
103         },
104         { .ctl_name = 0, },
105 };
106
107 static struct ctl_table dccp_dir_table[] = {
108         {
109                 .ctl_name       = NET_DCCP,
110                 .procname       = "dccp",
111                 .mode           = 0555,
112                 .child          = dccp_table,
113         },
114         { .ctl_name = 0, },
115 };
116
117 static struct ctl_table dccp_root_table[] = {
118         {
119                 .ctl_name       = CTL_NET,
120                 .procname       = "net",
121                 .mode           = 0555,
122                 .child          = dccp_dir_table,
123         },
124         { .ctl_name = 0, },
125 };
126
127 static struct ctl_table_header *dccp_table_header;
128
129 int __init dccp_sysctl_init(void)
130 {
131         dccp_table_header = register_sysctl_table(dccp_root_table, 1);
132
133         return dccp_table_header != NULL ? 0 : -ENOMEM;
134 }
135
136 void dccp_sysctl_exit(void)
137 {
138         if (dccp_table_header != NULL) {
139                 unregister_sysctl_table(dccp_table_header);
140                 dccp_table_header = NULL;
141         }
142 }