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1da177e4 LT |
1 | /* |
2 | * DECnet An implementation of the DECnet protocol suite for the LINUX | |
3 | * operating system. DECnet is implemented using the BSD Socket | |
4 | * interface as the means of communication with the user level. | |
5 | * | |
6 | * DECnet sysctl support functions | |
7 | * | |
8 | * Author: Steve Whitehouse <SteveW@ACM.org> | |
9 | * | |
10 | * | |
11 | * Changes: | |
12 | * Steve Whitehouse - C99 changes and default device handling | |
1f12bcc9 | 13 | * Steve Whitehouse - Memory buffer settings, like the tcp ones |
1da177e4 LT |
14 | * |
15 | */ | |
1da177e4 LT |
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 | ||
32 | int decnet_debug_level; | |
33 | int decnet_time_wait = 30; | |
34 | int decnet_dn_count = 1; | |
35 | int decnet_di_count = 3; | |
36 | int decnet_dr_count = 3; | |
37 | int decnet_log_martians = 1; | |
38 | int decnet_no_fc_max_cwnd = NSP_MIN_WINDOW; | |
39 | ||
1f12bcc9 | 40 | /* Reasonable defaults, I hope, based on tcp's defaults */ |
8d987e5c | 41 | long sysctl_decnet_mem[3] = { 768 << 3, 1024 << 3, 1536 << 3 }; |
1f12bcc9 SW |
42 | int sysctl_decnet_wmem[3] = { 4 * 1024, 16 * 1024, 128 * 1024 }; |
43 | int sysctl_decnet_rmem[3] = { 4 * 1024, 87380, 87380 * 2 }; | |
44 | ||
1da177e4 LT |
45 | #ifdef CONFIG_SYSCTL |
46 | extern int decnet_dst_gc_interval; | |
47 | static int min_decnet_time_wait[] = { 5 }; | |
48 | static int max_decnet_time_wait[] = { 600 }; | |
49 | static int min_state_count[] = { 1 }; | |
50 | static int max_state_count[] = { NSP_MAXRXTSHIFT }; | |
51 | static int min_decnet_dst_gc_interval[] = { 1 }; | |
52 | static int max_decnet_dst_gc_interval[] = { 60 }; | |
53 | static int min_decnet_no_fc_max_cwnd[] = { NSP_MIN_WINDOW }; | |
54 | static int max_decnet_no_fc_max_cwnd[] = { NSP_MAX_WINDOW }; | |
55 | static char node_name[7] = "???"; | |
56 | ||
57 | static struct ctl_table_header *dn_table_header = NULL; | |
58 | ||
59 | /* | |
60 | * ctype.h :-) | |
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 | ||
68 | static 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 | * Simple routine to parse an ascii DECnet address | |
86 | * into a network order address. | |
87 | */ | |
c4ea94ab | 88 | static int parse_addr(__le16 *addr, char *str) |
1da177e4 | 89 | { |
c4ea94ab | 90 | __u16 area, node; |
1da177e4 LT |
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 | ||
c4106aa8 | 129 | *addr = cpu_to_le16((area << 10) | node); |
1da177e4 LT |
130 | |
131 | return 0; | |
132 | } | |
133 | ||
429eb0fa | 134 | static int dn_node_address_handler(ctl_table *table, int write, |
1da177e4 LT |
135 | void __user *buffer, |
136 | size_t *lenp, loff_t *ppos) | |
137 | { | |
138 | char addr[DN_ASCBUF_LEN]; | |
139 | size_t len; | |
c4ea94ab | 140 | __le16 dnaddr; |
1da177e4 LT |
141 | |
142 | if (!*lenp || (*ppos && !write)) { | |
143 | *lenp = 0; | |
144 | return 0; | |
145 | } | |
146 | ||
147 | if (write) { | |
e57c624b | 148 | len = (*lenp < DN_ASCBUF_LEN) ? *lenp : (DN_ASCBUF_LEN-1); |
1da177e4 LT |
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 | ||
c4106aa8 | 170 | dn_addr2asc(le16_to_cpu(decnet_address), addr); |
1da177e4 LT |
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 | ||
429eb0fa | 185 | static int dn_def_dev_handler(ctl_table *table, int write, |
1da177e4 LT |
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 | ||
881d966b | 208 | dev = dev_get_by_name(&init_net, devname); |
1da177e4 LT |
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 | ||
248 | static ctl_table dn_table[] = { | |
249 | { | |
429eb0fa YH |
250 | .procname = "node_address", |
251 | .maxlen = 7, | |
252 | .mode = 0644, | |
1da177e4 | 253 | .proc_handler = dn_node_address_handler, |
1da177e4 LT |
254 | }, |
255 | { | |
1da177e4 | 256 | .procname = "node_name", |
429eb0fa | 257 | .data = node_name, |
1da177e4 LT |
258 | .maxlen = 7, |
259 | .mode = 0644, | |
6d9f239a | 260 | .proc_handler = proc_dostring, |
1da177e4 LT |
261 | }, |
262 | { | |
429eb0fa YH |
263 | .procname = "default_device", |
264 | .maxlen = 16, | |
1da177e4 LT |
265 | .mode = 0644, |
266 | .proc_handler = dn_def_dev_handler, | |
1da177e4 LT |
267 | }, |
268 | { | |
1da177e4 LT |
269 | .procname = "time_wait", |
270 | .data = &decnet_time_wait, | |
271 | .maxlen = sizeof(int), | |
272 | .mode = 0644, | |
6d9f239a | 273 | .proc_handler = proc_dointvec_minmax, |
1da177e4 LT |
274 | .extra1 = &min_decnet_time_wait, |
275 | .extra2 = &max_decnet_time_wait | |
276 | }, | |
277 | { | |
1da177e4 LT |
278 | .procname = "dn_count", |
279 | .data = &decnet_dn_count, | |
280 | .maxlen = sizeof(int), | |
281 | .mode = 0644, | |
6d9f239a | 282 | .proc_handler = proc_dointvec_minmax, |
1da177e4 LT |
283 | .extra1 = &min_state_count, |
284 | .extra2 = &max_state_count | |
285 | }, | |
286 | { | |
1da177e4 LT |
287 | .procname = "di_count", |
288 | .data = &decnet_di_count, | |
289 | .maxlen = sizeof(int), | |
290 | .mode = 0644, | |
6d9f239a | 291 | .proc_handler = proc_dointvec_minmax, |
1da177e4 LT |
292 | .extra1 = &min_state_count, |
293 | .extra2 = &max_state_count | |
294 | }, | |
295 | { | |
1da177e4 LT |
296 | .procname = "dr_count", |
297 | .data = &decnet_dr_count, | |
298 | .maxlen = sizeof(int), | |
299 | .mode = 0644, | |
6d9f239a | 300 | .proc_handler = proc_dointvec_minmax, |
1da177e4 LT |
301 | .extra1 = &min_state_count, |
302 | .extra2 = &max_state_count | |
303 | }, | |
304 | { | |
1da177e4 LT |
305 | .procname = "dst_gc_interval", |
306 | .data = &decnet_dst_gc_interval, | |
307 | .maxlen = sizeof(int), | |
308 | .mode = 0644, | |
6d9f239a | 309 | .proc_handler = proc_dointvec_minmax, |
1da177e4 LT |
310 | .extra1 = &min_decnet_dst_gc_interval, |
311 | .extra2 = &max_decnet_dst_gc_interval | |
312 | }, | |
313 | { | |
1da177e4 LT |
314 | .procname = "no_fc_max_cwnd", |
315 | .data = &decnet_no_fc_max_cwnd, | |
316 | .maxlen = sizeof(int), | |
317 | .mode = 0644, | |
6d9f239a | 318 | .proc_handler = proc_dointvec_minmax, |
1da177e4 LT |
319 | .extra1 = &min_decnet_no_fc_max_cwnd, |
320 | .extra2 = &max_decnet_no_fc_max_cwnd | |
321 | }, | |
1f12bcc9 | 322 | { |
429eb0fa YH |
323 | .procname = "decnet_mem", |
324 | .data = &sysctl_decnet_mem, | |
325 | .maxlen = sizeof(sysctl_decnet_mem), | |
326 | .mode = 0644, | |
8d987e5c | 327 | .proc_handler = proc_doulongvec_minmax |
429eb0fa YH |
328 | }, |
329 | { | |
429eb0fa YH |
330 | .procname = "decnet_rmem", |
331 | .data = &sysctl_decnet_rmem, | |
332 | .maxlen = sizeof(sysctl_decnet_rmem), | |
333 | .mode = 0644, | |
6d9f239a | 334 | .proc_handler = proc_dointvec, |
429eb0fa YH |
335 | }, |
336 | { | |
429eb0fa YH |
337 | .procname = "decnet_wmem", |
338 | .data = &sysctl_decnet_wmem, | |
339 | .maxlen = sizeof(sysctl_decnet_wmem), | |
340 | .mode = 0644, | |
6d9f239a | 341 | .proc_handler = proc_dointvec, |
429eb0fa | 342 | }, |
1da177e4 | 343 | { |
1da177e4 LT |
344 | .procname = "debug", |
345 | .data = &decnet_debug_level, | |
346 | .maxlen = sizeof(int), | |
347 | .mode = 0644, | |
6d9f239a | 348 | .proc_handler = proc_dointvec, |
1da177e4 | 349 | }, |
f8572d8f | 350 | { } |
1da177e4 LT |
351 | }; |
352 | ||
3151a9ab | 353 | static struct ctl_path dn_path[] = { |
f8572d8f EB |
354 | { .procname = "net", }, |
355 | { .procname = "decnet", }, | |
3151a9ab | 356 | { } |
1da177e4 LT |
357 | }; |
358 | ||
359 | void dn_register_sysctl(void) | |
360 | { | |
3151a9ab | 361 | dn_table_header = register_sysctl_paths(dn_path, dn_table); |
1da177e4 LT |
362 | } |
363 | ||
364 | void dn_unregister_sysctl(void) | |
365 | { | |
366 | unregister_sysctl_table(dn_table_header); | |
367 | } | |
368 | ||
369 | #else /* CONFIG_SYSCTL */ | |
370 | void dn_unregister_sysctl(void) | |
371 | { | |
372 | } | |
373 | void dn_register_sysctl(void) | |
374 | { | |
375 | } | |
376 | ||
377 | #endif |