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authorVladislav Yasevich <vladislav.yasevich@hp.com>2006-08-22 16:29:17 -0400
committerDavid S. Miller <davem@sunset.davemloft.net>2006-09-22 17:55:39 -0400
commit3fd091e73b81f131e1567c4d4a1ec042940bf2f7 (patch)
treec08ebbeee329bbc31cb578db1dddde7394431f5f /net/sctp/sysctl.c
parentce556b3a591fff3bebf8c5590a86aa98e1b2f153 (diff)
[SCTP]: Remove multiple levels of msecs to jiffies conversions.
The SCTP sysctl entries are displayed in milliseconds, but stored internally in jiffies. This results in multiple levels of msecs to jiffies conversion and as a result produces a truncation error. This patch makes things consistent in that we store and display defaults in milliseconds and only convert once for use by association. This patch also adds some sane min/max values so that we don't go off the deep end. Signed-off-by: Vladislav Yasevich <vladislav.yasevich@hp.com> Signed-off-by: Sridhar Samudrala <sri@us.ibm.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/sctp/sysctl.c')
-rw-r--r--net/sctp/sysctl.c140
1 files changed, 63 insertions, 77 deletions
diff --git a/net/sctp/sysctl.c b/net/sctp/sysctl.c
index dc6f3ff32358..633cd178654b 100644
--- a/net/sctp/sysctl.c
+++ b/net/sctp/sysctl.c
@@ -45,9 +45,10 @@
45#include <net/sctp/sctp.h> 45#include <net/sctp/sctp.h>
46#include <linux/sysctl.h> 46#include <linux/sysctl.h>
47 47
48static ctl_handler sctp_sysctl_jiffies_ms; 48static int zero = 0;
49static long rto_timer_min = 1; 49static int one = 1;
50static long rto_timer_max = 86400000; /* One day */ 50static int timer_max = 86400000; /* ms in one day */
51static int int_max = INT_MAX;
51static long sack_timer_min = 1; 52static long sack_timer_min = 1;
52static long sack_timer_max = 500; 53static long sack_timer_max = 500;
53 54
@@ -56,45 +57,45 @@ static ctl_table sctp_table[] = {
56 .ctl_name = NET_SCTP_RTO_INITIAL, 57 .ctl_name = NET_SCTP_RTO_INITIAL,
57 .procname = "rto_initial", 58 .procname = "rto_initial",
58 .data = &sctp_rto_initial, 59 .data = &sctp_rto_initial,
59 .maxlen = sizeof(long), 60 .maxlen = sizeof(unsigned int),
60 .mode = 0644, 61 .mode = 0644,
61 .proc_handler = &proc_doulongvec_ms_jiffies_minmax, 62 .proc_handler = &proc_dointvec_minmax,
62 .strategy = &sctp_sysctl_jiffies_ms, 63 .strategy = &sysctl_intvec,
63 .extra1 = &rto_timer_min, 64 .extra1 = &one,
64 .extra2 = &rto_timer_max 65 .extra2 = &timer_max
65 }, 66 },
66 { 67 {
67 .ctl_name = NET_SCTP_RTO_MIN, 68 .ctl_name = NET_SCTP_RTO_MIN,
68 .procname = "rto_min", 69 .procname = "rto_min",
69 .data = &sctp_rto_min, 70 .data = &sctp_rto_min,
70 .maxlen = sizeof(long), 71 .maxlen = sizeof(unsigned int),
71 .mode = 0644, 72 .mode = 0644,
72 .proc_handler = &proc_doulongvec_ms_jiffies_minmax, 73 .proc_handler = &proc_dointvec_minmax,
73 .strategy = &sctp_sysctl_jiffies_ms, 74 .strategy = &sysctl_intvec,
74 .extra1 = &rto_timer_min, 75 .extra1 = &one,
75 .extra2 = &rto_timer_max 76 .extra2 = &timer_max
76 }, 77 },
77 { 78 {
78 .ctl_name = NET_SCTP_RTO_MAX, 79 .ctl_name = NET_SCTP_RTO_MAX,
79 .procname = "rto_max", 80 .procname = "rto_max",
80 .data = &sctp_rto_max, 81 .data = &sctp_rto_max,
81 .maxlen = sizeof(long), 82 .maxlen = sizeof(unsigned int),
82 .mode = 0644, 83 .mode = 0644,
83 .proc_handler = &proc_doulongvec_ms_jiffies_minmax, 84 .proc_handler = &proc_dointvec_minmax,
84 .strategy = &sctp_sysctl_jiffies_ms, 85 .strategy = &sysctl_intvec,
85 .extra1 = &rto_timer_min, 86 .extra1 = &one,
86 .extra2 = &rto_timer_max 87 .extra2 = &timer_max
87 }, 88 },
88 { 89 {
89 .ctl_name = NET_SCTP_VALID_COOKIE_LIFE, 90 .ctl_name = NET_SCTP_VALID_COOKIE_LIFE,
90 .procname = "valid_cookie_life", 91 .procname = "valid_cookie_life",
91 .data = &sctp_valid_cookie_life, 92 .data = &sctp_valid_cookie_life,
92 .maxlen = sizeof(long), 93 .maxlen = sizeof(unsigned int),
93 .mode = 0644, 94 .mode = 0644,
94 .proc_handler = &proc_doulongvec_ms_jiffies_minmax, 95 .proc_handler = &proc_dointvec_minmax,
95 .strategy = &sctp_sysctl_jiffies_ms, 96 .strategy = &sysctl_intvec,
96 .extra1 = &rto_timer_min, 97 .extra1 = &one,
97 .extra2 = &rto_timer_max 98 .extra2 = &timer_max
98 }, 99 },
99 { 100 {
100 .ctl_name = NET_SCTP_MAX_BURST, 101 .ctl_name = NET_SCTP_MAX_BURST,
@@ -102,7 +103,10 @@ static ctl_table sctp_table[] = {
102 .data = &sctp_max_burst, 103 .data = &sctp_max_burst,
103 .maxlen = sizeof(int), 104 .maxlen = sizeof(int),
104 .mode = 0644, 105 .mode = 0644,
105 .proc_handler = &proc_dointvec 106 .proc_handler = &proc_dointvec_minmax,
107 .strategy = &sysctl_intvec,
108 .extra1 = &zero,
109 .extra2 = &int_max
106 }, 110 },
107 { 111 {
108 .ctl_name = NET_SCTP_ASSOCIATION_MAX_RETRANS, 112 .ctl_name = NET_SCTP_ASSOCIATION_MAX_RETRANS,
@@ -110,7 +114,10 @@ static ctl_table sctp_table[] = {
110 .data = &sctp_max_retrans_association, 114 .data = &sctp_max_retrans_association,
111 .maxlen = sizeof(int), 115 .maxlen = sizeof(int),
112 .mode = 0644, 116 .mode = 0644,
113 .proc_handler = &proc_dointvec 117 .proc_handler = &proc_dointvec_minmax,
118 .strategy = &sysctl_intvec,
119 .extra1 = &one,
120 .extra2 = &int_max
114 }, 121 },
115 { 122 {
116 .ctl_name = NET_SCTP_SNDBUF_POLICY, 123 .ctl_name = NET_SCTP_SNDBUF_POLICY,
@@ -118,7 +125,8 @@ static ctl_table sctp_table[] = {
118 .data = &sctp_sndbuf_policy, 125 .data = &sctp_sndbuf_policy,
119 .maxlen = sizeof(int), 126 .maxlen = sizeof(int),
120 .mode = 0644, 127 .mode = 0644,
121 .proc_handler = &proc_dointvec 128 .proc_handler = &proc_dointvec,
129 .strategy = &sysctl_intvec
122 }, 130 },
123 { 131 {
124 .ctl_name = NET_SCTP_RCVBUF_POLICY, 132 .ctl_name = NET_SCTP_RCVBUF_POLICY,
@@ -126,7 +134,8 @@ static ctl_table sctp_table[] = {
126 .data = &sctp_rcvbuf_policy, 134 .data = &sctp_rcvbuf_policy,
127 .maxlen = sizeof(int), 135 .maxlen = sizeof(int),
128 .mode = 0644, 136 .mode = 0644,
129 .proc_handler = &proc_dointvec 137 .proc_handler = &proc_dointvec,
138 .strategy = &sysctl_intvec
130 }, 139 },
131 { 140 {
132 .ctl_name = NET_SCTP_PATH_MAX_RETRANS, 141 .ctl_name = NET_SCTP_PATH_MAX_RETRANS,
@@ -134,7 +143,10 @@ static ctl_table sctp_table[] = {
134 .data = &sctp_max_retrans_path, 143 .data = &sctp_max_retrans_path,
135 .maxlen = sizeof(int), 144 .maxlen = sizeof(int),
136 .mode = 0644, 145 .mode = 0644,
137 .proc_handler = &proc_dointvec 146 .proc_handler = &proc_dointvec_minmax,
147 .strategy = &sysctl_intvec,
148 .extra1 = &one,
149 .extra2 = &int_max
138 }, 150 },
139 { 151 {
140 .ctl_name = NET_SCTP_MAX_INIT_RETRANSMITS, 152 .ctl_name = NET_SCTP_MAX_INIT_RETRANSMITS,
@@ -142,18 +154,21 @@ static ctl_table sctp_table[] = {
142 .data = &sctp_max_retrans_init, 154 .data = &sctp_max_retrans_init,
143 .maxlen = sizeof(int), 155 .maxlen = sizeof(int),
144 .mode = 0644, 156 .mode = 0644,
145 .proc_handler = &proc_dointvec 157 .proc_handler = &proc_dointvec_minmax,
158 .strategy = &sysctl_intvec,
159 .extra1 = &one,
160 .extra2 = &int_max
146 }, 161 },
147 { 162 {
148 .ctl_name = NET_SCTP_HB_INTERVAL, 163 .ctl_name = NET_SCTP_HB_INTERVAL,
149 .procname = "hb_interval", 164 .procname = "hb_interval",
150 .data = &sctp_hb_interval, 165 .data = &sctp_hb_interval,
151 .maxlen = sizeof(long), 166 .maxlen = sizeof(unsigned int),
152 .mode = 0644, 167 .mode = 0644,
153 .proc_handler = &proc_doulongvec_ms_jiffies_minmax, 168 .proc_handler = &proc_dointvec_minmax,
154 .strategy = &sctp_sysctl_jiffies_ms, 169 .strategy = &sysctl_intvec,
155 .extra1 = &rto_timer_min, 170 .extra1 = &one,
156 .extra2 = &rto_timer_max 171 .extra2 = &timer_max
157 }, 172 },
158 { 173 {
159 .ctl_name = NET_SCTP_PRESERVE_ENABLE, 174 .ctl_name = NET_SCTP_PRESERVE_ENABLE,
@@ -161,23 +176,26 @@ static ctl_table sctp_table[] = {
161 .data = &sctp_cookie_preserve_enable, 176 .data = &sctp_cookie_preserve_enable,
162 .maxlen = sizeof(int), 177 .maxlen = sizeof(int),
163 .mode = 0644, 178 .mode = 0644,
164 .proc_handler = &proc_dointvec 179 .proc_handler = &proc_dointvec,
180 .strategy = &sysctl_intvec
165 }, 181 },
166 { 182 {
167 .ctl_name = NET_SCTP_RTO_ALPHA, 183 .ctl_name = NET_SCTP_RTO_ALPHA,
168 .procname = "rto_alpha_exp_divisor", 184 .procname = "rto_alpha_exp_divisor",
169 .data = &sctp_rto_alpha, 185 .data = &sctp_rto_alpha,
170 .maxlen = sizeof(int), 186 .maxlen = sizeof(int),
171 .mode = 0644, 187 .mode = 0444,
172 .proc_handler = &proc_dointvec 188 .proc_handler = &proc_dointvec,
189 .strategy = &sysctl_intvec
173 }, 190 },
174 { 191 {
175 .ctl_name = NET_SCTP_RTO_BETA, 192 .ctl_name = NET_SCTP_RTO_BETA,
176 .procname = "rto_beta_exp_divisor", 193 .procname = "rto_beta_exp_divisor",
177 .data = &sctp_rto_beta, 194 .data = &sctp_rto_beta,
178 .maxlen = sizeof(int), 195 .maxlen = sizeof(int),
179 .mode = 0644, 196 .mode = 0444,
180 .proc_handler = &proc_dointvec 197 .proc_handler = &proc_dointvec,
198 .strategy = &sysctl_intvec
181 }, 199 },
182 { 200 {
183 .ctl_name = NET_SCTP_ADDIP_ENABLE, 201 .ctl_name = NET_SCTP_ADDIP_ENABLE,
@@ -185,7 +203,8 @@ static ctl_table sctp_table[] = {
185 .data = &sctp_addip_enable, 203 .data = &sctp_addip_enable,
186 .maxlen = sizeof(int), 204 .maxlen = sizeof(int),
187 .mode = 0644, 205 .mode = 0644,
188 .proc_handler = &proc_dointvec 206 .proc_handler = &proc_dointvec,
207 .strategy = &sysctl_intvec
189 }, 208 },
190 { 209 {
191 .ctl_name = NET_SCTP_PRSCTP_ENABLE, 210 .ctl_name = NET_SCTP_PRSCTP_ENABLE,
@@ -193,7 +212,8 @@ static ctl_table sctp_table[] = {
193 .data = &sctp_prsctp_enable, 212 .data = &sctp_prsctp_enable,
194 .maxlen = sizeof(int), 213 .maxlen = sizeof(int),
195 .mode = 0644, 214 .mode = 0644,
196 .proc_handler = &proc_dointvec 215 .proc_handler = &proc_dointvec,
216 .strategy = &sysctl_intvec
197 }, 217 },
198 { 218 {
199 .ctl_name = NET_SCTP_SACK_TIMEOUT, 219 .ctl_name = NET_SCTP_SACK_TIMEOUT,
@@ -201,8 +221,8 @@ static ctl_table sctp_table[] = {
201 .data = &sctp_sack_timeout, 221 .data = &sctp_sack_timeout,
202 .maxlen = sizeof(long), 222 .maxlen = sizeof(long),
203 .mode = 0644, 223 .mode = 0644,
204 .proc_handler = &proc_doulongvec_ms_jiffies_minmax, 224 .proc_handler = &proc_dointvec_minmax,
205 .strategy = &sctp_sysctl_jiffies_ms, 225 .strategy = &sysctl_intvec,
206 .extra1 = &sack_timer_min, 226 .extra1 = &sack_timer_min,
207 .extra2 = &sack_timer_max, 227 .extra2 = &sack_timer_max,
208 }, 228 },
@@ -242,37 +262,3 @@ void sctp_sysctl_unregister(void)
242{ 262{
243 unregister_sysctl_table(sctp_sysctl_header); 263 unregister_sysctl_table(sctp_sysctl_header);
244} 264}
245
246/* Strategy function to convert jiffies to milliseconds. */
247static 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) {
250
251 if (oldval) {
252 size_t olen;
253
254 if (oldlenp) {
255 if (get_user(olen, oldlenp))
256 return -EFAULT;
257
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;
268
269 if (newlen != sizeof (int))
270 return -EINVAL;
271
272 if (get_user(new, (int __user *)newval))
273 return -EFAULT;
274
275 *(int *)(table->data) = (new * HZ) / 1000;
276 }
277 return 1;
278}
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