ia64/linux-2.6.18-xen.hg

view net/sctp/sysctl.c @ 871:9cbcc9008446

xen/x86: don't initialize cpu_data[]'s apicid field on generic code

Afaict, this is not only redundant with the intialization done in
drivers/xen/core/smpboot.c, but actually results - at least for
secondary CPUs - in the Xen-specific value written to be later
overwritten with whatever the generic code determines (with no
guarantee that the two values are identical).

Signed-off-by: Jan Beulich <jbeulich@novell.com>
author Keir Fraser <keir.fraser@citrix.com>
date Thu May 14 10:09:15 2009 +0100 (2009-05-14)
parents 831230e53067
children
line source
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 */
44 #include <net/sctp/structs.h>
45 #include <net/sctp/sctp.h>
46 #include <linux/sysctl.h>
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;
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_RCVBUF_POLICY,
125 .procname = "rcvbuf_policy",
126 .data = &sctp_rcvbuf_policy,
127 .maxlen = sizeof(int),
128 .mode = 0644,
129 .proc_handler = &proc_dointvec
130 },
131 {
132 .ctl_name = NET_SCTP_PATH_MAX_RETRANS,
133 .procname = "path_max_retrans",
134 .data = &sctp_max_retrans_path,
135 .maxlen = sizeof(int),
136 .mode = 0644,
137 .proc_handler = &proc_dointvec
138 },
139 {
140 .ctl_name = NET_SCTP_MAX_INIT_RETRANSMITS,
141 .procname = "max_init_retransmits",
142 .data = &sctp_max_retrans_init,
143 .maxlen = sizeof(int),
144 .mode = 0644,
145 .proc_handler = &proc_dointvec
146 },
147 {
148 .ctl_name = NET_SCTP_HB_INTERVAL,
149 .procname = "hb_interval",
150 .data = &sctp_hb_interval,
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_PRESERVE_ENABLE,
160 .procname = "cookie_preserve_enable",
161 .data = &sctp_cookie_preserve_enable,
162 .maxlen = sizeof(int),
163 .mode = 0644,
164 .proc_handler = &proc_dointvec
165 },
166 {
167 .ctl_name = NET_SCTP_RTO_ALPHA,
168 .procname = "rto_alpha_exp_divisor",
169 .data = &sctp_rto_alpha,
170 .maxlen = sizeof(int),
171 .mode = 0644,
172 .proc_handler = &proc_dointvec
173 },
174 {
175 .ctl_name = NET_SCTP_RTO_BETA,
176 .procname = "rto_beta_exp_divisor",
177 .data = &sctp_rto_beta,
178 .maxlen = sizeof(int),
179 .mode = 0644,
180 .proc_handler = &proc_dointvec
181 },
182 {
183 .ctl_name = NET_SCTP_ADDIP_ENABLE,
184 .procname = "addip_enable",
185 .data = &sctp_addip_enable,
186 .maxlen = sizeof(int),
187 .mode = 0644,
188 .proc_handler = &proc_dointvec
189 },
190 {
191 .ctl_name = NET_SCTP_PRSCTP_ENABLE,
192 .procname = "prsctp_enable",
193 .data = &sctp_prsctp_enable,
194 .maxlen = sizeof(int),
195 .mode = 0644,
196 .proc_handler = &proc_dointvec
197 },
198 {
199 .ctl_name = NET_SCTP_SACK_TIMEOUT,
200 .procname = "sack_timeout",
201 .data = &sctp_sack_timeout,
202 .maxlen = sizeof(long),
203 .mode = 0644,
204 .proc_handler = &proc_doulongvec_ms_jiffies_minmax,
205 .strategy = &sctp_sysctl_jiffies_ms,
206 .extra1 = &sack_timer_min,
207 .extra2 = &sack_timer_max,
208 },
209 { .ctl_name = 0 }
210 };
212 static ctl_table sctp_net_table[] = {
213 {
214 .ctl_name = NET_SCTP,
215 .procname = "sctp",
216 .mode = 0555,
217 .child = sctp_table
218 },
219 { .ctl_name = 0 }
220 };
222 static ctl_table sctp_root_table[] = {
223 {
224 .ctl_name = CTL_NET,
225 .procname = "net",
226 .mode = 0555,
227 .child = sctp_net_table
228 },
229 { .ctl_name = 0 }
230 };
232 static struct ctl_table_header * sctp_sysctl_header;
234 /* Sysctl registration. */
235 void sctp_sysctl_register(void)
236 {
237 sctp_sysctl_header = register_sysctl_table(sctp_root_table, 0);
238 }
240 /* Sysctl deregistration. */
241 void sctp_sysctl_unregister(void)
242 {
243 unregister_sysctl_table(sctp_sysctl_header);
244 }
246 /* Strategy function to convert jiffies to milliseconds. */
247 static int sctp_sysctl_jiffies_ms(ctl_table *table, int __user *name, int nlen,
248 void __user *oldval, size_t __user *oldlenp,
249 void __user *newval, size_t newlen, void **context) {
251 if (oldval) {
252 size_t olen;
254 if (oldlenp) {
255 if (get_user(olen, oldlenp))
256 return -EFAULT;
258 if (olen != sizeof (int))
259 return -EINVAL;
260 }
261 if (put_user((*(int *)(table->data) * 1000) / HZ,
262 (int __user *)oldval) ||
263 (oldlenp && put_user(sizeof (int), oldlenp)))
264 return -EFAULT;
265 }
266 if (newval && newlen) {
267 int new;
269 if (newlen != sizeof (int))
270 return -EINVAL;
272 if (get_user(new, (int __user *)newval))
273 return -EFAULT;
275 *(int *)(table->data) = (new * HZ) / 1000;
276 }
277 return 1;
278 }