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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
134
135static int dn_node_address_strategy(ctl_table *table,
136 void __user *oldval, size_t __user *oldlenp,
137 void __user *newval, size_t newlen)
138{
139 size_t len;
140 __le16 addr;
141
142 if (oldval && oldlenp) {
143 if (get_user(len, oldlenp))
144 return -EFAULT;
145 if (len) {
146 if (len != sizeof(unsigned short))
147 return -EINVAL;
148 if (put_user(decnet_address, (__le16 __user *)oldval))
149 return -EFAULT;
150 }
151 }
152 if (newval && newlen) {
153 if (newlen != sizeof(unsigned short))
154 return -EINVAL;
155 if (get_user(addr, (__le16 __user *)newval))
156 return -EFAULT;
157
158 dn_dev_devices_off();
159
160 decnet_address = addr;
161
162 dn_dev_devices_on();
163 }
164 return 0;
165}
166
167static int dn_node_address_handler(ctl_table *table, int write,
168 void __user *buffer,
169 size_t *lenp, loff_t *ppos)
170{
171 char addr[DN_ASCBUF_LEN];
172 size_t len;
173 __le16 dnaddr;
174
175 if (!*lenp || (*ppos && !write)) {
176 *lenp = 0;
177 return 0;
178 }
179
180 if (write) {
181 len = (*lenp < DN_ASCBUF_LEN) ? *lenp : (DN_ASCBUF_LEN-1);
182
183 if (copy_from_user(addr, buffer, len))
184 return -EFAULT;
185
186 addr[len] = 0;
187 strip_it(addr);
188
189 if (parse_addr(&dnaddr, addr))
190 return -EINVAL;
191
192 dn_dev_devices_off();
193
194 decnet_address = dnaddr;
195
196 dn_dev_devices_on();
197
198 *ppos += len;
199
200 return 0;
201 }
202
203 dn_addr2asc(le16_to_cpu(decnet_address), addr);
204 len = strlen(addr);
205 addr[len++] = '\n';
206
207 if (len > *lenp) len = *lenp;
208
209 if (copy_to_user(buffer, addr, len))
210 return -EFAULT;
211
212 *lenp = len;
213 *ppos += len;
214
215 return 0;
216}
217
218
219static int dn_def_dev_strategy(ctl_table *table,
220 void __user *oldval, size_t __user *oldlenp,
221 void __user *newval, size_t newlen)
222{
223 size_t len;
224 struct net_device *dev;
225 char devname[17];
226 size_t namel;
227 int rv = 0;
228
229 devname[0] = 0;
230
231 if (oldval && oldlenp) {
232 if (get_user(len, oldlenp))
233 return -EFAULT;
234 if (len) {
235 dev = dn_dev_get_default();
236 if (dev) {
237 strcpy(devname, dev->name);
238 dev_put(dev);
239 }
240
241 namel = strlen(devname) + 1;
242 if (len > namel) len = namel;
243
244 if (copy_to_user(oldval, devname, len))
245 return -EFAULT;
246
247 if (put_user(len, oldlenp))
248 return -EFAULT;
249 }
250 }
251
252 if (newval && newlen) {
253 if (newlen > 16)
254 return -E2BIG;
255
256 if (copy_from_user(devname, newval, newlen))
257 return -EFAULT;
258
259 devname[newlen] = 0;
260
261 dev = dev_get_by_name(&init_net, devname);
262 if (dev == NULL)
263 return -ENODEV;
264
265 rv = -ENODEV;
266 if (dev->dn_ptr != NULL)
267 rv = dn_dev_set_default(dev, 1);
268 if (rv)
269 dev_put(dev);
270 }
271
272 return rv;
273}
274
275
276static int dn_def_dev_handler(ctl_table *table, int write,
277 void __user *buffer,
278 size_t *lenp, loff_t *ppos)
279{
280 size_t len;
281 struct net_device *dev;
282 char devname[17];
283
284 if (!*lenp || (*ppos && !write)) {
285 *lenp = 0;
286 return 0;
287 }
288
289 if (write) {
290 if (*lenp > 16)
291 return -E2BIG;
292
293 if (copy_from_user(devname, buffer, *lenp))
294 return -EFAULT;
295
296 devname[*lenp] = 0;
297 strip_it(devname);
298
299 dev = dev_get_by_name(&init_net, devname);
300 if (dev == NULL)
301 return -ENODEV;
302
303 if (dev->dn_ptr == NULL) {
304 dev_put(dev);
305 return -ENODEV;
306 }
307
308 if (dn_dev_set_default(dev, 1)) {
309 dev_put(dev);
310 return -ENODEV;
311 }
312 *ppos += *lenp;
313
314 return 0;
315 }
316
317 dev = dn_dev_get_default();
318 if (dev == NULL) {
319 *lenp = 0;
320 return 0;
321 }
322
323 strcpy(devname, dev->name);
324 dev_put(dev);
325 len = strlen(devname);
326 devname[len++] = '\n';
327
328 if (len > *lenp) len = *lenp;
329
330 if (copy_to_user(buffer, devname, len))
331 return -EFAULT;
332
333 *lenp = len;
334 *ppos += len;
335
336 return 0;
337}
338
339static ctl_table dn_table[] = {
340 {
341 .ctl_name = NET_DECNET_NODE_ADDRESS,
342 .procname = "node_address",
343 .maxlen = 7,
344 .mode = 0644,
345 .proc_handler = dn_node_address_handler,
346 .strategy = dn_node_address_strategy,
347 },
348 {
349 .ctl_name = NET_DECNET_NODE_NAME,
350 .procname = "node_name",
351 .data = node_name,
352 .maxlen = 7,
353 .mode = 0644,
354 .proc_handler = proc_dostring,
355 .strategy = sysctl_string,
356 },
357 {
358 .ctl_name = NET_DECNET_DEFAULT_DEVICE,
359 .procname = "default_device",
360 .maxlen = 16,
361 .mode = 0644,
362 .proc_handler = dn_def_dev_handler,
363 .strategy = dn_def_dev_strategy,
364 },
365 {
366 .ctl_name = NET_DECNET_TIME_WAIT,
367 .procname = "time_wait",
368 .data = &decnet_time_wait,
369 .maxlen = sizeof(int),
370 .mode = 0644,
371 .proc_handler = proc_dointvec_minmax,
372 .strategy = sysctl_intvec,
373 .extra1 = &min_decnet_time_wait,
374 .extra2 = &max_decnet_time_wait
375 },
376 {
377 .ctl_name = NET_DECNET_DN_COUNT,
378 .procname = "dn_count",
379 .data = &decnet_dn_count,
380 .maxlen = sizeof(int),
381 .mode = 0644,
382 .proc_handler = proc_dointvec_minmax,
383 .strategy = sysctl_intvec,
384 .extra1 = &min_state_count,
385 .extra2 = &max_state_count
386 },
387 {
388 .ctl_name = NET_DECNET_DI_COUNT,
389 .procname = "di_count",
390 .data = &decnet_di_count,
391 .maxlen = sizeof(int),
392 .mode = 0644,
393 .proc_handler = proc_dointvec_minmax,
394 .strategy = sysctl_intvec,
395 .extra1 = &min_state_count,
396 .extra2 = &max_state_count
397 },
398 {
399 .ctl_name = NET_DECNET_DR_COUNT,
400 .procname = "dr_count",
401 .data = &decnet_dr_count,
402 .maxlen = sizeof(int),
403 .mode = 0644,
404 .proc_handler = proc_dointvec_minmax,
405 .strategy = sysctl_intvec,
406 .extra1 = &min_state_count,
407 .extra2 = &max_state_count
408 },
409 {
410 .ctl_name = NET_DECNET_DST_GC_INTERVAL,
411 .procname = "dst_gc_interval",
412 .data = &decnet_dst_gc_interval,
413 .maxlen = sizeof(int),
414 .mode = 0644,
415 .proc_handler = proc_dointvec_minmax,
416 .strategy = sysctl_intvec,
417 .extra1 = &min_decnet_dst_gc_interval,
418 .extra2 = &max_decnet_dst_gc_interval
419 },
420 {
421 .ctl_name = NET_DECNET_NO_FC_MAX_CWND,
422 .procname = "no_fc_max_cwnd",
423 .data = &decnet_no_fc_max_cwnd,
424 .maxlen = sizeof(int),
425 .mode = 0644,
426 .proc_handler = proc_dointvec_minmax,
427 .strategy = sysctl_intvec,
428 .extra1 = &min_decnet_no_fc_max_cwnd,
429 .extra2 = &max_decnet_no_fc_max_cwnd
430 },
431 {
432 .ctl_name = NET_DECNET_MEM,
433 .procname = "decnet_mem",
434 .data = &sysctl_decnet_mem,
435 .maxlen = sizeof(sysctl_decnet_mem),
436 .mode = 0644,
437 .proc_handler = proc_dointvec,
438 .strategy = sysctl_intvec,
439 },
440 {
441 .ctl_name = NET_DECNET_RMEM,
442 .procname = "decnet_rmem",
443 .data = &sysctl_decnet_rmem,
444 .maxlen = sizeof(sysctl_decnet_rmem),
445 .mode = 0644,
446 .proc_handler = proc_dointvec,
447 .strategy = sysctl_intvec,
448 },
449 {
450 .ctl_name = NET_DECNET_WMEM,
451 .procname = "decnet_wmem",
452 .data = &sysctl_decnet_wmem,
453 .maxlen = sizeof(sysctl_decnet_wmem),
454 .mode = 0644,
455 .proc_handler = proc_dointvec,
456 .strategy = sysctl_intvec,
457 },
458 {
459 .ctl_name = NET_DECNET_DEBUG_LEVEL,
460 .procname = "debug",
461 .data = &decnet_debug_level,
462 .maxlen = sizeof(int),
463 .mode = 0644,
464 .proc_handler = proc_dointvec,
465 .strategy = sysctl_intvec,
466 },
467 {0}
468};
469
470static struct ctl_path dn_path[] = {
471 { .procname = "net", .ctl_name = CTL_NET, },
472 { .procname = "decnet", .ctl_name = NET_DECNET, },
473 { }
474};
475
476void dn_register_sysctl(void)
477{
478 dn_table_header = register_sysctl_paths(dn_path, dn_table);
479}
480
481void dn_unregister_sysctl(void)
482{
483 unregister_sysctl_table(dn_table_header);
484}
485
486#else
487void dn_unregister_sysctl(void)
488{
489}
490void dn_register_sysctl(void)
491{
492}
493
494#endif
495
