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16#include <linux/mm.h>
17#include <linux/sysctl.h>
18#include <linux/fs.h>
19#include <linux/netdevice.h>
20#include <linux/string.h>
21#include <net/neighbour.h>
22#include <net/dst.h>
23#include <net/flow.h>
24
25#include <asm/uaccess.h>
26
27#include <net/dn.h>
28#include <net/dn_dev.h>
29#include <net/dn_route.h>
30
31
32int decnet_debug_level;
33int decnet_time_wait = 30;
34int decnet_dn_count = 1;
35int decnet_di_count = 3;
36int decnet_dr_count = 3;
37int decnet_log_martians = 1;
38int decnet_no_fc_max_cwnd = NSP_MIN_WINDOW;
39
40
41int sysctl_decnet_mem[3] = { 768 << 3, 1024 << 3, 1536 << 3 };
42int sysctl_decnet_wmem[3] = { 4 * 1024, 16 * 1024, 128 * 1024 };
43int sysctl_decnet_rmem[3] = { 4 * 1024, 87380, 87380 * 2 };
44
45#ifdef CONFIG_SYSCTL
46extern int decnet_dst_gc_interval;
47static int min_decnet_time_wait[] = { 5 };
48static int max_decnet_time_wait[] = { 600 };
49static int min_state_count[] = { 1 };
50static int max_state_count[] = { NSP_MAXRXTSHIFT };
51static int min_decnet_dst_gc_interval[] = { 1 };
52static int max_decnet_dst_gc_interval[] = { 60 };
53static int min_decnet_no_fc_max_cwnd[] = { NSP_MIN_WINDOW };
54static int max_decnet_no_fc_max_cwnd[] = { NSP_MAX_WINDOW };
55static char node_name[7] = "???";
56
57static struct ctl_table_header *dn_table_header = NULL;
58
59
60
61
62#define ISNUM(x) (((x) >= '0') && ((x) <= '9'))
63#define ISLOWER(x) (((x) >= 'a') && ((x) <= 'z'))
64#define ISUPPER(x) (((x) >= 'A') && ((x) <= 'Z'))
65#define ISALPHA(x) (ISLOWER(x) || ISUPPER(x))
66#define INVALID_END_CHAR(x) (ISNUM(x) || ISALPHA(x))
67
68static void strip_it(char *str)
69{
70 for(;;) {
71 switch(*str) {
72 case ' ':
73 case '\n':
74 case '\r':
75 case ':':
76 *str = 0;
77 case 0:
78 return;
79 }
80 str++;
81 }
82}
83
84
85
86
87
88static int parse_addr(__le16 *addr, char *str)
89{
90 __u16 area, node;
91
92 while(*str && !ISNUM(*str)) str++;
93
94 if (*str == 0)
95 return -1;
96
97 area = (*str++ - '0');
98 if (ISNUM(*str)) {
99 area *= 10;
100 area += (*str++ - '0');
101 }
102
103 if (*str++ != '.')
104 return -1;
105
106 if (!ISNUM(*str))
107 return -1;
108
109 node = *str++ - '0';
110 if (ISNUM(*str)) {
111 node *= 10;
112 node += (*str++ - '0');
113 }
114 if (ISNUM(*str)) {
115 node *= 10;
116 node += (*str++ - '0');
117 }
118 if (ISNUM(*str)) {
119 node *= 10;
120 node += (*str++ - '0');
121 }
122
123 if ((node > 1023) || (area > 63))
124 return -1;
125
126 if (INVALID_END_CHAR(*str))
127 return -1;
128
129 *addr = cpu_to_le16((area << 10) | node);
130
131 return 0;
132}
133
134static int dn_node_address_handler(ctl_table *table, int write,
135 void __user *buffer,
136 size_t *lenp, loff_t *ppos)
137{
138 char addr[DN_ASCBUF_LEN];
139 size_t len;
140 __le16 dnaddr;
141
142 if (!*lenp || (*ppos && !write)) {
143 *lenp = 0;
144 return 0;
145 }
146
147 if (write) {
148 len = (*lenp < DN_ASCBUF_LEN) ? *lenp : (DN_ASCBUF_LEN-1);
149
150 if (copy_from_user(addr, buffer, len))
151 return -EFAULT;
152
153 addr[len] = 0;
154 strip_it(addr);
155
156 if (parse_addr(&dnaddr, addr))
157 return -EINVAL;
158
159 dn_dev_devices_off();
160
161 decnet_address = dnaddr;
162
163 dn_dev_devices_on();
164
165 *ppos += len;
166
167 return 0;
168 }
169
170 dn_addr2asc(le16_to_cpu(decnet_address), addr);
171 len = strlen(addr);
172 addr[len++] = '\n';
173
174 if (len > *lenp) len = *lenp;
175
176 if (copy_to_user(buffer, addr, len))
177 return -EFAULT;
178
179 *lenp = len;
180 *ppos += len;
181
182 return 0;
183}
184
185static int dn_def_dev_handler(ctl_table *table, int write,
186 void __user *buffer,
187 size_t *lenp, loff_t *ppos)
188{
189 size_t len;
190 struct net_device *dev;
191 char devname[17];
192
193 if (!*lenp || (*ppos && !write)) {
194 *lenp = 0;
195 return 0;
196 }
197
198 if (write) {
199 if (*lenp > 16)
200 return -E2BIG;
201
202 if (copy_from_user(devname, buffer, *lenp))
203 return -EFAULT;
204
205 devname[*lenp] = 0;
206 strip_it(devname);
207
208 dev = dev_get_by_name(&init_net, devname);
209 if (dev == NULL)
210 return -ENODEV;
211
212 if (dev->dn_ptr == NULL) {
213 dev_put(dev);
214 return -ENODEV;
215 }
216
217 if (dn_dev_set_default(dev, 1)) {
218 dev_put(dev);
219 return -ENODEV;
220 }
221 *ppos += *lenp;
222
223 return 0;
224 }
225
226 dev = dn_dev_get_default();
227 if (dev == NULL) {
228 *lenp = 0;
229 return 0;
230 }
231
232 strcpy(devname, dev->name);
233 dev_put(dev);
234 len = strlen(devname);
235 devname[len++] = '\n';
236
237 if (len > *lenp) len = *lenp;
238
239 if (copy_to_user(buffer, devname, len))
240 return -EFAULT;
241
242 *lenp = len;
243 *ppos += len;
244
245 return 0;
246}
247
248static ctl_table dn_table[] = {
249 {
250 .procname = "node_address",
251 .maxlen = 7,
252 .mode = 0644,
253 .proc_handler = dn_node_address_handler,
254 },
255 {
256 .procname = "node_name",
257 .data = node_name,
258 .maxlen = 7,
259 .mode = 0644,
260 .proc_handler = proc_dostring,
261 },
262 {
263 .procname = "default_device",
264 .maxlen = 16,
265 .mode = 0644,
266 .proc_handler = dn_def_dev_handler,
267 },
268 {
269 .procname = "time_wait",
270 .data = &decnet_time_wait,
271 .maxlen = sizeof(int),
272 .mode = 0644,
273 .proc_handler = proc_dointvec_minmax,
274 .extra1 = &min_decnet_time_wait,
275 .extra2 = &max_decnet_time_wait
276 },
277 {
278 .procname = "dn_count",
279 .data = &decnet_dn_count,
280 .maxlen = sizeof(int),
281 .mode = 0644,
282 .proc_handler = proc_dointvec_minmax,
283 .extra1 = &min_state_count,
284 .extra2 = &max_state_count
285 },
286 {
287 .procname = "di_count",
288 .data = &decnet_di_count,
289 .maxlen = sizeof(int),
290 .mode = 0644,
291 .proc_handler = proc_dointvec_minmax,
292 .extra1 = &min_state_count,
293 .extra2 = &max_state_count
294 },
295 {
296 .procname = "dr_count",
297 .data = &decnet_dr_count,
298 .maxlen = sizeof(int),
299 .mode = 0644,
300 .proc_handler = proc_dointvec_minmax,
301 .extra1 = &min_state_count,
302 .extra2 = &max_state_count
303 },
304 {
305 .procname = "dst_gc_interval",
306 .data = &decnet_dst_gc_interval,
307 .maxlen = sizeof(int),
308 .mode = 0644,
309 .proc_handler = proc_dointvec_minmax,
310 .extra1 = &min_decnet_dst_gc_interval,
311 .extra2 = &max_decnet_dst_gc_interval
312 },
313 {
314 .procname = "no_fc_max_cwnd",
315 .data = &decnet_no_fc_max_cwnd,
316 .maxlen = sizeof(int),
317 .mode = 0644,
318 .proc_handler = proc_dointvec_minmax,
319 .extra1 = &min_decnet_no_fc_max_cwnd,
320 .extra2 = &max_decnet_no_fc_max_cwnd
321 },
322 {
323 .procname = "decnet_mem",
324 .data = &sysctl_decnet_mem,
325 .maxlen = sizeof(sysctl_decnet_mem),
326 .mode = 0644,
327 .proc_handler = proc_dointvec,
328 },
329 {
330 .procname = "decnet_rmem",
331 .data = &sysctl_decnet_rmem,
332 .maxlen = sizeof(sysctl_decnet_rmem),
333 .mode = 0644,
334 .proc_handler = proc_dointvec,
335 },
336 {
337 .procname = "decnet_wmem",
338 .data = &sysctl_decnet_wmem,
339 .maxlen = sizeof(sysctl_decnet_wmem),
340 .mode = 0644,
341 .proc_handler = proc_dointvec,
342 },
343 {
344 .procname = "debug",
345 .data = &decnet_debug_level,
346 .maxlen = sizeof(int),
347 .mode = 0644,
348 .proc_handler = proc_dointvec,
349 },
350 { }
351};
352
353static struct ctl_path dn_path[] = {
354 { .procname = "net", },
355 { .procname = "decnet", },
356 { }
357};
358
359void dn_register_sysctl(void)
360{
361 dn_table_header = register_sysctl_paths(dn_path, dn_table);
362}
363
364void dn_unregister_sysctl(void)
365{
366 unregister_sysctl_table(dn_table_header);
367}
368
369#else
370void dn_unregister_sysctl(void)
371{
372}
373void dn_register_sysctl(void)
374{
375}
376
377#endif
378
