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.
6 * DECnet sysctl support functions
8 * Author: Steve Whitehouse <SteveW@ACM.org>
12 * Steve Whitehouse - C99 changes and default device handling
13 * Steve Whitehouse - Memory buffer settings, like the tcp ones
17 #include <linux/sysctl.h>
19 #include <linux/netdevice.h>
20 #include <linux/string.h>
21 #include <net/neighbour.h>
25 #include <asm/uaccess.h>
28 #include <net/dn_dev.h>
29 #include <net/dn_route.h>
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;
40 /* Reasonable defaults, I hope, based on tcp's defaults */
41 long sysctl_decnet_mem[3] = { 768 << 3, 1024 << 3, 1536 << 3 };
42 int sysctl_decnet_wmem[3] = { 4 * 1024, 16 * 1024, 128 * 1024 };
43 int sysctl_decnet_rmem[3] = { 4 * 1024, 87380, 87380 * 2 };
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] = "???";
57 static struct ctl_table_header *dn_table_header = NULL;
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))
68 static void strip_it(char *str)
86 * Simple routine to parse an ascii DECnet address
87 * into a network order address.
89 static int parse_addr(__le16 *addr, char *str)
93 while(*str && !ISNUM(*str)) str++;
98 area = (*str++ - '0');
101 area += (*str++ - '0');
113 node += (*str++ - '0');
117 node += (*str++ - '0');
121 node += (*str++ - '0');
124 if ((node > 1023) || (area > 63))
127 if (INVALID_END_CHAR(*str))
130 *addr = cpu_to_le16((area << 10) | node);
135 static int dn_node_address_handler(ctl_table *table, int write,
137 size_t *lenp, loff_t *ppos)
139 char addr[DN_ASCBUF_LEN];
143 if (!*lenp || (*ppos && !write)) {
149 len = (*lenp < DN_ASCBUF_LEN) ? *lenp : (DN_ASCBUF_LEN-1);
151 if (copy_from_user(addr, buffer, len))
157 if (parse_addr(&dnaddr, addr))
160 dn_dev_devices_off();
162 decnet_address = dnaddr;
171 dn_addr2asc(le16_to_cpu(decnet_address), addr);
175 if (len > *lenp) len = *lenp;
177 if (copy_to_user(buffer, addr, len))
186 static int dn_def_dev_handler(ctl_table *table, int write,
188 size_t *lenp, loff_t *ppos)
191 struct net_device *dev;
194 if (!*lenp || (*ppos && !write)) {
203 if (copy_from_user(devname, buffer, *lenp))
209 dev = dev_get_by_name(&init_net, devname);
213 if (dev->dn_ptr == NULL) {
218 if (dn_dev_set_default(dev, 1)) {
227 dev = dn_dev_get_default();
233 strcpy(devname, dev->name);
235 len = strlen(devname);
236 devname[len++] = '\n';
238 if (len > *lenp) len = *lenp;
240 if (copy_to_user(buffer, devname, len))
249 static ctl_table dn_table[] = {
251 .procname = "node_address",
254 .proc_handler = dn_node_address_handler,
257 .procname = "node_name",
261 .proc_handler = proc_dostring,
264 .procname = "default_device",
267 .proc_handler = dn_def_dev_handler,
270 .procname = "time_wait",
271 .data = &decnet_time_wait,
272 .maxlen = sizeof(int),
274 .proc_handler = proc_dointvec_minmax,
275 .extra1 = &min_decnet_time_wait,
276 .extra2 = &max_decnet_time_wait
279 .procname = "dn_count",
280 .data = &decnet_dn_count,
281 .maxlen = sizeof(int),
283 .proc_handler = proc_dointvec_minmax,
284 .extra1 = &min_state_count,
285 .extra2 = &max_state_count
288 .procname = "di_count",
289 .data = &decnet_di_count,
290 .maxlen = sizeof(int),
292 .proc_handler = proc_dointvec_minmax,
293 .extra1 = &min_state_count,
294 .extra2 = &max_state_count
297 .procname = "dr_count",
298 .data = &decnet_dr_count,
299 .maxlen = sizeof(int),
301 .proc_handler = proc_dointvec_minmax,
302 .extra1 = &min_state_count,
303 .extra2 = &max_state_count
306 .procname = "dst_gc_interval",
307 .data = &decnet_dst_gc_interval,
308 .maxlen = sizeof(int),
310 .proc_handler = proc_dointvec_minmax,
311 .extra1 = &min_decnet_dst_gc_interval,
312 .extra2 = &max_decnet_dst_gc_interval
315 .procname = "no_fc_max_cwnd",
316 .data = &decnet_no_fc_max_cwnd,
317 .maxlen = sizeof(int),
319 .proc_handler = proc_dointvec_minmax,
320 .extra1 = &min_decnet_no_fc_max_cwnd,
321 .extra2 = &max_decnet_no_fc_max_cwnd
324 .procname = "decnet_mem",
325 .data = &sysctl_decnet_mem,
326 .maxlen = sizeof(sysctl_decnet_mem),
328 .proc_handler = proc_doulongvec_minmax
331 .procname = "decnet_rmem",
332 .data = &sysctl_decnet_rmem,
333 .maxlen = sizeof(sysctl_decnet_rmem),
335 .proc_handler = proc_dointvec,
338 .procname = "decnet_wmem",
339 .data = &sysctl_decnet_wmem,
340 .maxlen = sizeof(sysctl_decnet_wmem),
342 .proc_handler = proc_dointvec,
346 .data = &decnet_debug_level,
347 .maxlen = sizeof(int),
349 .proc_handler = proc_dointvec,
354 void dn_register_sysctl(void)
356 dn_table_header = register_net_sysctl(&init_net, "net/decnet", dn_table);
359 void dn_unregister_sysctl(void)
361 unregister_net_sysctl_table(dn_table_header);
364 #else /* CONFIG_SYSCTL */
365 void dn_unregister_sysctl(void)
368 void dn_register_sysctl(void)