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1da177e4 LT |
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 <linux/sysctl.h> | |
46 | ||
47 | static ctl_handler sctp_sysctl_jiffies_ms; | |
48 | static long rto_timer_min = 1; | |
49 | static long rto_timer_max = 86400000; /* One day */ | |
50 | ||
51 | static ctl_table sctp_table[] = { | |
52 | { | |
53 | .ctl_name = NET_SCTP_RTO_INITIAL, | |
54 | .procname = "rto_initial", | |
55 | .data = &sctp_rto_initial, | |
56 | .maxlen = sizeof(long), | |
57 | .mode = 0644, | |
58 | .proc_handler = &proc_doulongvec_ms_jiffies_minmax, | |
59 | .strategy = &sctp_sysctl_jiffies_ms, | |
60 | .extra1 = &rto_timer_min, | |
61 | .extra2 = &rto_timer_max | |
62 | }, | |
63 | { | |
64 | .ctl_name = NET_SCTP_RTO_MIN, | |
65 | .procname = "rto_min", | |
66 | .data = &sctp_rto_min, | |
67 | .maxlen = sizeof(long), | |
68 | .mode = 0644, | |
69 | .proc_handler = &proc_doulongvec_ms_jiffies_minmax, | |
70 | .strategy = &sctp_sysctl_jiffies_ms, | |
71 | .extra1 = &rto_timer_min, | |
72 | .extra2 = &rto_timer_max | |
73 | }, | |
74 | { | |
75 | .ctl_name = NET_SCTP_RTO_MAX, | |
76 | .procname = "rto_max", | |
77 | .data = &sctp_rto_max, | |
78 | .maxlen = sizeof(long), | |
79 | .mode = 0644, | |
80 | .proc_handler = &proc_doulongvec_ms_jiffies_minmax, | |
81 | .strategy = &sctp_sysctl_jiffies_ms, | |
82 | .extra1 = &rto_timer_min, | |
83 | .extra2 = &rto_timer_max | |
84 | }, | |
85 | { | |
86 | .ctl_name = NET_SCTP_VALID_COOKIE_LIFE, | |
87 | .procname = "valid_cookie_life", | |
88 | .data = &sctp_valid_cookie_life, | |
89 | .maxlen = sizeof(long), | |
90 | .mode = 0644, | |
91 | .proc_handler = &proc_doulongvec_ms_jiffies_minmax, | |
92 | .strategy = &sctp_sysctl_jiffies_ms, | |
93 | .extra1 = &rto_timer_min, | |
94 | .extra2 = &rto_timer_max | |
95 | }, | |
96 | { | |
97 | .ctl_name = NET_SCTP_MAX_BURST, | |
98 | .procname = "max_burst", | |
99 | .data = &sctp_max_burst, | |
100 | .maxlen = sizeof(int), | |
101 | .mode = 0644, | |
102 | .proc_handler = &proc_dointvec | |
103 | }, | |
104 | { | |
105 | .ctl_name = NET_SCTP_ASSOCIATION_MAX_RETRANS, | |
106 | .procname = "association_max_retrans", | |
107 | .data = &sctp_max_retrans_association, | |
108 | .maxlen = sizeof(int), | |
109 | .mode = 0644, | |
110 | .proc_handler = &proc_dointvec | |
111 | }, | |
4eb701df NH |
112 | { |
113 | .ctl_name = NET_SCTP_SNDBUF_POLICY, | |
114 | .procname = "sndbuf_policy", | |
115 | .data = &sctp_sndbuf_policy, | |
116 | .maxlen = sizeof(int), | |
117 | .mode = 0644, | |
118 | .proc_handler = &proc_dointvec | |
119 | }, | |
1da177e4 LT |
120 | { |
121 | .ctl_name = NET_SCTP_PATH_MAX_RETRANS, | |
122 | .procname = "path_max_retrans", | |
123 | .data = &sctp_max_retrans_path, | |
124 | .maxlen = sizeof(int), | |
125 | .mode = 0644, | |
126 | .proc_handler = &proc_dointvec | |
127 | }, | |
128 | { | |
129 | .ctl_name = NET_SCTP_MAX_INIT_RETRANSMITS, | |
130 | .procname = "max_init_retransmits", | |
131 | .data = &sctp_max_retrans_init, | |
132 | .maxlen = sizeof(int), | |
133 | .mode = 0644, | |
134 | .proc_handler = &proc_dointvec | |
135 | }, | |
136 | { | |
137 | .ctl_name = NET_SCTP_HB_INTERVAL, | |
138 | .procname = "hb_interval", | |
139 | .data = &sctp_hb_interval, | |
140 | .maxlen = sizeof(long), | |
141 | .mode = 0644, | |
142 | .proc_handler = &proc_doulongvec_ms_jiffies_minmax, | |
143 | .strategy = &sctp_sysctl_jiffies_ms, | |
144 | .extra1 = &rto_timer_min, | |
145 | .extra2 = &rto_timer_max | |
146 | }, | |
147 | { | |
148 | .ctl_name = NET_SCTP_PRESERVE_ENABLE, | |
149 | .procname = "cookie_preserve_enable", | |
150 | .data = &sctp_cookie_preserve_enable, | |
151 | .maxlen = sizeof(long), | |
152 | .mode = 0644, | |
153 | .proc_handler = &proc_doulongvec_ms_jiffies_minmax, | |
154 | .strategy = &sctp_sysctl_jiffies_ms, | |
155 | .extra1 = &rto_timer_min, | |
156 | .extra2 = &rto_timer_max | |
157 | }, | |
158 | { | |
159 | .ctl_name = NET_SCTP_RTO_ALPHA, | |
160 | .procname = "rto_alpha_exp_divisor", | |
161 | .data = &sctp_rto_alpha, | |
162 | .maxlen = sizeof(int), | |
163 | .mode = 0644, | |
164 | .proc_handler = &proc_dointvec | |
165 | }, | |
166 | { | |
167 | .ctl_name = NET_SCTP_RTO_BETA, | |
168 | .procname = "rto_beta_exp_divisor", | |
169 | .data = &sctp_rto_beta, | |
170 | .maxlen = sizeof(int), | |
171 | .mode = 0644, | |
172 | .proc_handler = &proc_dointvec | |
173 | }, | |
174 | { | |
175 | .ctl_name = NET_SCTP_ADDIP_ENABLE, | |
176 | .procname = "addip_enable", | |
177 | .data = &sctp_addip_enable, | |
178 | .maxlen = sizeof(int), | |
179 | .mode = 0644, | |
180 | .proc_handler = &proc_dointvec | |
181 | }, | |
182 | { | |
183 | .ctl_name = NET_SCTP_PRSCTP_ENABLE, | |
184 | .procname = "prsctp_enable", | |
185 | .data = &sctp_prsctp_enable, | |
186 | .maxlen = sizeof(int), | |
187 | .mode = 0644, | |
188 | .proc_handler = &proc_dointvec | |
189 | }, | |
190 | { .ctl_name = 0 } | |
191 | }; | |
192 | ||
193 | static ctl_table sctp_net_table[] = { | |
194 | { | |
195 | .ctl_name = NET_SCTP, | |
196 | .procname = "sctp", | |
197 | .mode = 0555, | |
198 | .child = sctp_table | |
199 | }, | |
200 | { .ctl_name = 0 } | |
201 | }; | |
202 | ||
203 | static ctl_table sctp_root_table[] = { | |
204 | { | |
205 | .ctl_name = CTL_NET, | |
206 | .procname = "net", | |
207 | .mode = 0555, | |
208 | .child = sctp_net_table | |
209 | }, | |
210 | { .ctl_name = 0 } | |
211 | }; | |
212 | ||
213 | static struct ctl_table_header * sctp_sysctl_header; | |
214 | ||
215 | /* Sysctl registration. */ | |
216 | void sctp_sysctl_register(void) | |
217 | { | |
218 | sctp_sysctl_header = register_sysctl_table(sctp_root_table, 0); | |
219 | } | |
220 | ||
221 | /* Sysctl deregistration. */ | |
222 | void sctp_sysctl_unregister(void) | |
223 | { | |
224 | unregister_sysctl_table(sctp_sysctl_header); | |
225 | } | |
226 | ||
227 | /* Strategy function to convert jiffies to milliseconds. */ | |
228 | static int sctp_sysctl_jiffies_ms(ctl_table *table, int __user *name, int nlen, | |
229 | void __user *oldval, size_t __user *oldlenp, | |
230 | void __user *newval, size_t newlen, void **context) { | |
231 | ||
232 | if (oldval) { | |
233 | size_t olen; | |
234 | ||
235 | if (oldlenp) { | |
236 | if (get_user(olen, oldlenp)) | |
237 | return -EFAULT; | |
238 | ||
239 | if (olen != sizeof (int)) | |
240 | return -EINVAL; | |
241 | } | |
242 | if (put_user((*(int *)(table->data) * 1000) / HZ, | |
243 | (int __user *)oldval) || | |
244 | (oldlenp && put_user(sizeof (int), oldlenp))) | |
245 | return -EFAULT; | |
246 | } | |
247 | if (newval && newlen) { | |
248 | int new; | |
249 | ||
250 | if (newlen != sizeof (int)) | |
251 | return -EINVAL; | |
252 | ||
253 | if (get_user(new, (int __user *)newval)) | |
254 | return -EFAULT; | |
255 | ||
256 | *(int *)(table->data) = (new * HZ) / 1000; | |
257 | } | |
258 | return 1; | |
259 | } |