1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
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
41long 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
78 case 0:
79 return;
80 }
81 str++;
82 }
83}
84
85
86
87
88
89static int parse_addr(__le16 *addr, char *str)
90{
91 __u16 area, node;
92
93 while(*str && !ISNUM(*str)) str++;
94
95 if (*str == 0)
96 return -1;
97
98 area = (*str++ - '0');
99 if (ISNUM(*str)) {
100 area *= 10;
101 area += (*str++ - '0');
102 }
103
104 if (*str++ != '.')
105 return -1;
106
107 if (!ISNUM(*str))
108 return -1;
109
110 node = *str++ - '0';
111 if (ISNUM(*str)) {
112 node *= 10;
113 node += (*str++ - '0');
114 }
115 if (ISNUM(*str)) {
116 node *= 10;
117 node += (*str++ - '0');
118 }
119 if (ISNUM(*str)) {
120 node *= 10;
121 node += (*str++ - '0');
122 }
123
124 if ((node > 1023) || (area > 63))
125 return -1;
126
127 if (INVALID_END_CHAR(*str))
128 return -1;
129
130 *addr = cpu_to_le16((area << 10) | node);
131
132 return 0;
133}
134
135static int dn_node_address_handler(struct ctl_table *table, int write,
136 void __user *buffer,
137 size_t *lenp, loff_t *ppos)
138{
139 char addr[DN_ASCBUF_LEN];
140 size_t len;
141 __le16 dnaddr;
142
143 if (!*lenp || (*ppos && !write)) {
144 *lenp = 0;
145 return 0;
146 }
147
148 if (write) {
149 len = (*lenp < DN_ASCBUF_LEN) ? *lenp : (DN_ASCBUF_LEN-1);
150
151 if (copy_from_user(addr, buffer, len))
152 return -EFAULT;
153
154 addr[len] = 0;
155 strip_it(addr);
156
157 if (parse_addr(&dnaddr, addr))
158 return -EINVAL;
159
160 dn_dev_devices_off();
161
162 decnet_address = dnaddr;
163
164 dn_dev_devices_on();
165
166 *ppos += len;
167
168 return 0;
169 }
170
171 dn_addr2asc(le16_to_cpu(decnet_address), addr);
172 len = strlen(addr);
173 addr[len++] = '\n';
174
175 if (len > *lenp) len = *lenp;
176
177 if (copy_to_user(buffer, addr, len))
178 return -EFAULT;
179
180 *lenp = len;
181 *ppos += len;
182
183 return 0;
184}
185
186static int dn_def_dev_handler(struct ctl_table *table, int write,
187 void __user *buffer,
188 size_t *lenp, loff_t *ppos)
189{
190 size_t len;
191 struct net_device *dev;
192 char devname[17];
193
194 if (!*lenp || (*ppos && !write)) {
195 *lenp = 0;
196 return 0;
197 }
198
199 if (write) {
200 if (*lenp > 16)
201 return -E2BIG;
202
203 if (copy_from_user(devname, buffer, *lenp))
204 return -EFAULT;
205
206 devname[*lenp] = 0;
207 strip_it(devname);
208
209 dev = dev_get_by_name(&init_net, devname);
210 if (dev == NULL)
211 return -ENODEV;
212
213 if (dev->dn_ptr == NULL) {
214 dev_put(dev);
215 return -ENODEV;
216 }
217
218 if (dn_dev_set_default(dev, 1)) {
219 dev_put(dev);
220 return -ENODEV;
221 }
222 *ppos += *lenp;
223
224 return 0;
225 }
226
227 dev = dn_dev_get_default();
228 if (dev == NULL) {
229 *lenp = 0;
230 return 0;
231 }
232
233 strcpy(devname, dev->name);
234 dev_put(dev);
235 len = strlen(devname);
236 devname[len++] = '\n';
237
238 if (len > *lenp) len = *lenp;
239
240 if (copy_to_user(buffer, devname, len))
241 return -EFAULT;
242
243 *lenp = len;
244 *ppos += len;
245
246 return 0;
247}
248
249static struct ctl_table dn_table[] = {
250 {
251 .procname = "node_address",
252 .maxlen = 7,
253 .mode = 0644,
254 .proc_handler = dn_node_address_handler,
255 },
256 {
257 .procname = "node_name",
258 .data = node_name,
259 .maxlen = 7,
260 .mode = 0644,
261 .proc_handler = proc_dostring,
262 },
263 {
264 .procname = "default_device",
265 .maxlen = 16,
266 .mode = 0644,
267 .proc_handler = dn_def_dev_handler,
268 },
269 {
270 .procname = "time_wait",
271 .data = &decnet_time_wait,
272 .maxlen = sizeof(int),
273 .mode = 0644,
274 .proc_handler = proc_dointvec_minmax,
275 .extra1 = &min_decnet_time_wait,
276 .extra2 = &max_decnet_time_wait
277 },
278 {
279 .procname = "dn_count",
280 .data = &decnet_dn_count,
281 .maxlen = sizeof(int),
282 .mode = 0644,
283 .proc_handler = proc_dointvec_minmax,
284 .extra1 = &min_state_count,
285 .extra2 = &max_state_count
286 },
287 {
288 .procname = "di_count",
289 .data = &decnet_di_count,
290 .maxlen = sizeof(int),
291 .mode = 0644,
292 .proc_handler = proc_dointvec_minmax,
293 .extra1 = &min_state_count,
294 .extra2 = &max_state_count
295 },
296 {
297 .procname = "dr_count",
298 .data = &decnet_dr_count,
299 .maxlen = sizeof(int),
300 .mode = 0644,
301 .proc_handler = proc_dointvec_minmax,
302 .extra1 = &min_state_count,
303 .extra2 = &max_state_count
304 },
305 {
306 .procname = "dst_gc_interval",
307 .data = &decnet_dst_gc_interval,
308 .maxlen = sizeof(int),
309 .mode = 0644,
310 .proc_handler = proc_dointvec_minmax,
311 .extra1 = &min_decnet_dst_gc_interval,
312 .extra2 = &max_decnet_dst_gc_interval
313 },
314 {
315 .procname = "no_fc_max_cwnd",
316 .data = &decnet_no_fc_max_cwnd,
317 .maxlen = sizeof(int),
318 .mode = 0644,
319 .proc_handler = proc_dointvec_minmax,
320 .extra1 = &min_decnet_no_fc_max_cwnd,
321 .extra2 = &max_decnet_no_fc_max_cwnd
322 },
323 {
324 .procname = "decnet_mem",
325 .data = &sysctl_decnet_mem,
326 .maxlen = sizeof(sysctl_decnet_mem),
327 .mode = 0644,
328 .proc_handler = proc_doulongvec_minmax
329 },
330 {
331 .procname = "decnet_rmem",
332 .data = &sysctl_decnet_rmem,
333 .maxlen = sizeof(sysctl_decnet_rmem),
334 .mode = 0644,
335 .proc_handler = proc_dointvec,
336 },
337 {
338 .procname = "decnet_wmem",
339 .data = &sysctl_decnet_wmem,
340 .maxlen = sizeof(sysctl_decnet_wmem),
341 .mode = 0644,
342 .proc_handler = proc_dointvec,
343 },
344 {
345 .procname = "debug",
346 .data = &decnet_debug_level,
347 .maxlen = sizeof(int),
348 .mode = 0644,
349 .proc_handler = proc_dointvec,
350 },
351 { }
352};
353
354void dn_register_sysctl(void)
355{
356 dn_table_header = register_net_sysctl(&init_net, "net/decnet", dn_table);
357}
358
359void dn_unregister_sysctl(void)
360{
361 unregister_net_sysctl_table(dn_table_header);
362}
363
364#else
365void dn_unregister_sysctl(void)
366{
367}
368void dn_register_sysctl(void)
369{
370}
371
372#endif
373
