Commit | Line | Data |
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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(;;) { | |
06f8fe11 JP |
71 | switch (*str) { |
72 | case ' ': | |
73 | case '\n': | |
74 | case '\r': | |
75 | case ':': | |
76 | *str = 0; | |
77 | /* Fallthrough */ | |
78 | case 0: | |
79 | return; | |
1da177e4 LT |
80 | } |
81 | str++; | |
82 | } | |
83 | } | |
84 | ||
85 | /* | |
86 | * Simple routine to parse an ascii DECnet address | |
87 | * into a network order address. | |
88 | */ | |
c4ea94ab | 89 | static int parse_addr(__le16 *addr, char *str) |
1da177e4 | 90 | { |
c4ea94ab | 91 | __u16 area, node; |
1da177e4 LT |
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 | ||
c4106aa8 | 130 | *addr = cpu_to_le16((area << 10) | node); |
1da177e4 LT |
131 | |
132 | return 0; | |
133 | } | |
134 | ||
fe2c6338 | 135 | static int dn_node_address_handler(struct ctl_table *table, int write, |
1da177e4 LT |
136 | void __user *buffer, |
137 | size_t *lenp, loff_t *ppos) | |
138 | { | |
139 | char addr[DN_ASCBUF_LEN]; | |
140 | size_t len; | |
c4ea94ab | 141 | __le16 dnaddr; |
1da177e4 LT |
142 | |
143 | if (!*lenp || (*ppos && !write)) { | |
144 | *lenp = 0; | |
145 | return 0; | |
146 | } | |
147 | ||
148 | if (write) { | |
e57c624b | 149 | len = (*lenp < DN_ASCBUF_LEN) ? *lenp : (DN_ASCBUF_LEN-1); |
1da177e4 LT |
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 | ||
c4106aa8 | 171 | dn_addr2asc(le16_to_cpu(decnet_address), addr); |
1da177e4 LT |
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 | ||
fe2c6338 | 186 | static int dn_def_dev_handler(struct ctl_table *table, int write, |
1da177e4 LT |
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 | ||
881d966b | 209 | dev = dev_get_by_name(&init_net, devname); |
1da177e4 LT |
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 | ||
fe2c6338 | 249 | static struct ctl_table dn_table[] = { |
1da177e4 | 250 | { |
429eb0fa YH |
251 | .procname = "node_address", |
252 | .maxlen = 7, | |
253 | .mode = 0644, | |
1da177e4 | 254 | .proc_handler = dn_node_address_handler, |
1da177e4 LT |
255 | }, |
256 | { | |
1da177e4 | 257 | .procname = "node_name", |
429eb0fa | 258 | .data = node_name, |
1da177e4 LT |
259 | .maxlen = 7, |
260 | .mode = 0644, | |
6d9f239a | 261 | .proc_handler = proc_dostring, |
1da177e4 LT |
262 | }, |
263 | { | |
429eb0fa YH |
264 | .procname = "default_device", |
265 | .maxlen = 16, | |
1da177e4 LT |
266 | .mode = 0644, |
267 | .proc_handler = dn_def_dev_handler, | |
1da177e4 LT |
268 | }, |
269 | { | |
1da177e4 LT |
270 | .procname = "time_wait", |
271 | .data = &decnet_time_wait, | |
272 | .maxlen = sizeof(int), | |
273 | .mode = 0644, | |
6d9f239a | 274 | .proc_handler = proc_dointvec_minmax, |
1da177e4 LT |
275 | .extra1 = &min_decnet_time_wait, |
276 | .extra2 = &max_decnet_time_wait | |
277 | }, | |
278 | { | |
1da177e4 LT |
279 | .procname = "dn_count", |
280 | .data = &decnet_dn_count, | |
281 | .maxlen = sizeof(int), | |
282 | .mode = 0644, | |
6d9f239a | 283 | .proc_handler = proc_dointvec_minmax, |
1da177e4 LT |
284 | .extra1 = &min_state_count, |
285 | .extra2 = &max_state_count | |
286 | }, | |
287 | { | |
1da177e4 LT |
288 | .procname = "di_count", |
289 | .data = &decnet_di_count, | |
290 | .maxlen = sizeof(int), | |
291 | .mode = 0644, | |
6d9f239a | 292 | .proc_handler = proc_dointvec_minmax, |
1da177e4 LT |
293 | .extra1 = &min_state_count, |
294 | .extra2 = &max_state_count | |
295 | }, | |
296 | { | |
1da177e4 LT |
297 | .procname = "dr_count", |
298 | .data = &decnet_dr_count, | |
299 | .maxlen = sizeof(int), | |
300 | .mode = 0644, | |
6d9f239a | 301 | .proc_handler = proc_dointvec_minmax, |
1da177e4 LT |
302 | .extra1 = &min_state_count, |
303 | .extra2 = &max_state_count | |
304 | }, | |
305 | { | |
1da177e4 LT |
306 | .procname = "dst_gc_interval", |
307 | .data = &decnet_dst_gc_interval, | |
308 | .maxlen = sizeof(int), | |
309 | .mode = 0644, | |
6d9f239a | 310 | .proc_handler = proc_dointvec_minmax, |
1da177e4 LT |
311 | .extra1 = &min_decnet_dst_gc_interval, |
312 | .extra2 = &max_decnet_dst_gc_interval | |
313 | }, | |
314 | { | |
1da177e4 LT |
315 | .procname = "no_fc_max_cwnd", |
316 | .data = &decnet_no_fc_max_cwnd, | |
317 | .maxlen = sizeof(int), | |
318 | .mode = 0644, | |
6d9f239a | 319 | .proc_handler = proc_dointvec_minmax, |
1da177e4 LT |
320 | .extra1 = &min_decnet_no_fc_max_cwnd, |
321 | .extra2 = &max_decnet_no_fc_max_cwnd | |
322 | }, | |
1f12bcc9 | 323 | { |
429eb0fa YH |
324 | .procname = "decnet_mem", |
325 | .data = &sysctl_decnet_mem, | |
326 | .maxlen = sizeof(sysctl_decnet_mem), | |
327 | .mode = 0644, | |
8d987e5c | 328 | .proc_handler = proc_doulongvec_minmax |
429eb0fa YH |
329 | }, |
330 | { | |
429eb0fa YH |
331 | .procname = "decnet_rmem", |
332 | .data = &sysctl_decnet_rmem, | |
333 | .maxlen = sizeof(sysctl_decnet_rmem), | |
334 | .mode = 0644, | |
6d9f239a | 335 | .proc_handler = proc_dointvec, |
429eb0fa YH |
336 | }, |
337 | { | |
429eb0fa YH |
338 | .procname = "decnet_wmem", |
339 | .data = &sysctl_decnet_wmem, | |
340 | .maxlen = sizeof(sysctl_decnet_wmem), | |
341 | .mode = 0644, | |
6d9f239a | 342 | .proc_handler = proc_dointvec, |
429eb0fa | 343 | }, |
1da177e4 | 344 | { |
1da177e4 LT |
345 | .procname = "debug", |
346 | .data = &decnet_debug_level, | |
347 | .maxlen = sizeof(int), | |
348 | .mode = 0644, | |
6d9f239a | 349 | .proc_handler = proc_dointvec, |
1da177e4 | 350 | }, |
f8572d8f | 351 | { } |
1da177e4 LT |
352 | }; |
353 | ||
1da177e4 LT |
354 | void dn_register_sysctl(void) |
355 | { | |
9bdcc88f | 356 | dn_table_header = register_net_sysctl(&init_net, "net/decnet", dn_table); |
1da177e4 LT |
357 | } |
358 | ||
359 | void dn_unregister_sysctl(void) | |
360 | { | |
5dd3df10 | 361 | unregister_net_sysctl_table(dn_table_header); |
1da177e4 LT |
362 | } |
363 | ||
364 | #else /* CONFIG_SYSCTL */ | |
365 | void dn_unregister_sysctl(void) | |
366 | { | |
367 | } | |
368 | void dn_register_sysctl(void) | |
369 | { | |
370 | } | |
371 | ||
372 | #endif |