[SCTP]: net/sctp/sysctl.c should #include <net/sctp/sctp.h>
[linux-2.6.git] / net / sctp / sysctl.c
1 /* SCTP kernel reference Implementation
2  * (C) Copyright IBM Corp. 2002, 2004
3  * Copyright (c) 2002 Intel Corp.
4  *
5  * This file is part of the SCTP kernel reference Implementation
6  *
7  * Sysctl related interfaces for SCTP.
8  *
9  * The SCTP reference implementation is free software;
10  * you can redistribute it and/or modify it under the terms of
11  * the GNU General Public License as published by
12  * the Free Software Foundation; either version 2, or (at your option)
13  * any later version.
14  *
15  * The SCTP reference implementation is distributed in the hope that it
16  * will be useful, but WITHOUT ANY WARRANTY; without even the implied
17  *                 ************************
18  * warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
19  * See the GNU General Public License for more details.
20  *
21  * You should have received a copy of the GNU General Public License
22  * along with GNU CC; see the file COPYING.  If not, write to
23  * the Free Software Foundation, 59 Temple Place - Suite 330,
24  * Boston, MA 02111-1307, USA.
25  *
26  * Please send any bug reports or fixes you make to the
27  * email address(es):
28  *    lksctp developers <lksctp-developers@lists.sourceforge.net>
29  *
30  * Or submit a bug report through the following website:
31  *    http://www.sf.net/projects/lksctp
32  *
33  * Written or modified by:
34  *    Mingqin Liu           <liuming@us.ibm.com>
35  *    Jon Grimm             <jgrimm@us.ibm.com>
36  *    Ardelle Fan           <ardelle.fan@intel.com>
37  *    Ryan Layer            <rmlayer@us.ibm.com>
38  *    Sridhar Samudrala     <sri@us.ibm.com>
39  *
40  * Any bugs reported given to us we will try to fix... any fixes shared will
41  * be incorporated into the next SCTP release.
42  */
43
44 #include <net/sctp/structs.h>
45 #include <net/sctp/sctp.h>
46 #include <linux/sysctl.h>
47
48 static ctl_handler sctp_sysctl_jiffies_ms;
49 static long rto_timer_min = 1;
50 static long rto_timer_max = 86400000; /* One day */
51 static long sack_timer_min = 1;
52 static long sack_timer_max = 500;
53
54 static ctl_table sctp_table[] = {
55         {
56                 .ctl_name       = NET_SCTP_RTO_INITIAL,
57                 .procname       = "rto_initial",
58                 .data           = &sctp_rto_initial,
59                 .maxlen         = sizeof(long),
60                 .mode           = 0644,
61                 .proc_handler   = &proc_doulongvec_ms_jiffies_minmax,
62                 .strategy       = &sctp_sysctl_jiffies_ms,
63                 .extra1         = &rto_timer_min,
64                 .extra2         = &rto_timer_max
65         },
66         {
67                 .ctl_name       = NET_SCTP_RTO_MIN,
68                 .procname       = "rto_min",
69                 .data           = &sctp_rto_min,
70                 .maxlen         = sizeof(long),
71                 .mode           = 0644,
72                 .proc_handler   = &proc_doulongvec_ms_jiffies_minmax,
73                 .strategy       = &sctp_sysctl_jiffies_ms,
74                 .extra1         = &rto_timer_min,
75                 .extra2         = &rto_timer_max
76         },
77         {
78                 .ctl_name       = NET_SCTP_RTO_MAX,
79                 .procname       = "rto_max",
80                 .data           = &sctp_rto_max,
81                 .maxlen         = sizeof(long),
82                 .mode           = 0644,
83                 .proc_handler   = &proc_doulongvec_ms_jiffies_minmax,
84                 .strategy       = &sctp_sysctl_jiffies_ms,
85                 .extra1         = &rto_timer_min,
86                 .extra2         = &rto_timer_max
87         },
88         {
89                 .ctl_name       = NET_SCTP_VALID_COOKIE_LIFE,
90                 .procname       = "valid_cookie_life",
91                 .data           = &sctp_valid_cookie_life,
92                 .maxlen         = sizeof(long),
93                 .mode           = 0644,
94                 .proc_handler   = &proc_doulongvec_ms_jiffies_minmax,
95                 .strategy       = &sctp_sysctl_jiffies_ms,
96                 .extra1         = &rto_timer_min,
97                 .extra2         = &rto_timer_max
98         },
99         {
100                 .ctl_name       = NET_SCTP_MAX_BURST,
101                 .procname       = "max_burst",
102                 .data           = &sctp_max_burst,
103                 .maxlen         = sizeof(int),
104                 .mode           = 0644,
105                 .proc_handler   = &proc_dointvec
106         },
107         {
108                 .ctl_name       = NET_SCTP_ASSOCIATION_MAX_RETRANS,
109                 .procname       = "association_max_retrans",
110                 .data           = &sctp_max_retrans_association,
111                 .maxlen         = sizeof(int),
112                 .mode           = 0644,
113                 .proc_handler   = &proc_dointvec
114         },
115         {
116                 .ctl_name       = NET_SCTP_SNDBUF_POLICY,
117                 .procname       = "sndbuf_policy",
118                 .data           = &sctp_sndbuf_policy,
119                 .maxlen         = sizeof(int),
120                 .mode           = 0644,
121                 .proc_handler   = &proc_dointvec
122         },
123         {
124                 .ctl_name       = NET_SCTP_PATH_MAX_RETRANS,
125                 .procname       = "path_max_retrans",
126                 .data           = &sctp_max_retrans_path,
127                 .maxlen         = sizeof(int),
128                 .mode           = 0644,
129                 .proc_handler   = &proc_dointvec
130         },
131         {
132                 .ctl_name       = NET_SCTP_MAX_INIT_RETRANSMITS,
133                 .procname       = "max_init_retransmits",
134                 .data           = &sctp_max_retrans_init,
135                 .maxlen         = sizeof(int),
136                 .mode           = 0644,
137                 .proc_handler   = &proc_dointvec
138         },
139         {
140                 .ctl_name       = NET_SCTP_HB_INTERVAL,
141                 .procname       = "hb_interval",
142                 .data           = &sctp_hb_interval,
143                 .maxlen         = sizeof(long),
144                 .mode           = 0644,
145                 .proc_handler   = &proc_doulongvec_ms_jiffies_minmax,
146                 .strategy       = &sctp_sysctl_jiffies_ms,
147                 .extra1         = &rto_timer_min,
148                 .extra2         = &rto_timer_max
149         },
150         {
151                 .ctl_name       = NET_SCTP_PRESERVE_ENABLE,
152                 .procname       = "cookie_preserve_enable",
153                 .data           = &sctp_cookie_preserve_enable,
154                 .maxlen         = sizeof(long),
155                 .mode           = 0644,
156                 .proc_handler   = &proc_doulongvec_ms_jiffies_minmax,
157                 .strategy       = &sctp_sysctl_jiffies_ms,
158                 .extra1         = &rto_timer_min,
159                 .extra2         = &rto_timer_max
160         },
161         {
162                 .ctl_name       = NET_SCTP_RTO_ALPHA,
163                 .procname       = "rto_alpha_exp_divisor",
164                 .data           = &sctp_rto_alpha,
165                 .maxlen         = sizeof(int),
166                 .mode           = 0644,
167                 .proc_handler   = &proc_dointvec
168         },
169         {
170                 .ctl_name       = NET_SCTP_RTO_BETA,
171                 .procname       = "rto_beta_exp_divisor",
172                 .data           = &sctp_rto_beta,
173                 .maxlen         = sizeof(int),
174                 .mode           = 0644,
175                 .proc_handler   = &proc_dointvec
176         },
177         {
178                 .ctl_name       = NET_SCTP_ADDIP_ENABLE,
179                 .procname       = "addip_enable",
180                 .data           = &sctp_addip_enable,
181                 .maxlen         = sizeof(int),
182                 .mode           = 0644,
183                 .proc_handler   = &proc_dointvec
184         },
185         {
186                 .ctl_name       = NET_SCTP_PRSCTP_ENABLE,
187                 .procname       = "prsctp_enable",
188                 .data           = &sctp_prsctp_enable,
189                 .maxlen         = sizeof(int),
190                 .mode           = 0644,
191                 .proc_handler   = &proc_dointvec
192         },
193         {
194                 .ctl_name       = NET_SCTP_SACK_TIMEOUT,
195                 .procname       = "sack_timeout",
196                 .data           = &sctp_sack_timeout,
197                 .maxlen         = sizeof(long),
198                 .mode           = 0644,
199                 .proc_handler   = &proc_doulongvec_ms_jiffies_minmax,
200                 .strategy       = &sctp_sysctl_jiffies_ms,
201                 .extra1         = &sack_timer_min,
202                 .extra2         = &sack_timer_max,
203         },
204         { .ctl_name = 0 }
205 };
206
207 static ctl_table sctp_net_table[] = {
208         {
209                 .ctl_name       = NET_SCTP,
210                 .procname       = "sctp",
211                 .mode           = 0555,
212                 .child          = sctp_table
213         },
214         { .ctl_name = 0 }
215 };
216
217 static ctl_table sctp_root_table[] = {
218         {
219                 .ctl_name       = CTL_NET,
220                 .procname       = "net",
221                 .mode           = 0555,
222                 .child          = sctp_net_table
223         },
224         { .ctl_name = 0 }
225 };
226
227 static struct ctl_table_header * sctp_sysctl_header;
228
229 /* Sysctl registration.  */
230 void sctp_sysctl_register(void)
231 {
232         sctp_sysctl_header = register_sysctl_table(sctp_root_table, 0);
233 }
234
235 /* Sysctl deregistration.  */
236 void sctp_sysctl_unregister(void)
237 {
238         unregister_sysctl_table(sctp_sysctl_header);
239 }
240
241 /* Strategy function to convert jiffies to milliseconds.  */
242 static int sctp_sysctl_jiffies_ms(ctl_table *table, int __user *name, int nlen,
243                 void __user *oldval, size_t __user *oldlenp,
244                 void __user *newval, size_t newlen, void **context) {
245
246         if (oldval) {
247                 size_t olen;
248
249                 if (oldlenp) {
250                         if (get_user(olen, oldlenp))
251                                 return -EFAULT;
252
253                         if (olen != sizeof (int))
254                                 return -EINVAL;
255                 }
256                 if (put_user((*(int *)(table->data) * 1000) / HZ,
257                         (int __user *)oldval) ||
258                     (oldlenp && put_user(sizeof (int), oldlenp)))
259                         return -EFAULT;
260         }
261         if (newval && newlen) {
262                 int new;
263
264                 if (newlen != sizeof (int))
265                         return -EINVAL;
266
267                 if (get_user(new, (int __user *)newval))
268                         return -EFAULT;
269
270                 *(int *)(table->data) = (new * HZ) / 1000;
271         }
272         return 1;
273 }