Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 |
Steven Whitehouse | 1f12bcc9 | 2005-12-05 13:42:06 -0800 | [diff] [blame] | 13 | * Steve Whitehouse - Memory buffer settings, like the tcp ones |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 14 | * |
| 15 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 | |
Steven Whitehouse | 1f12bcc9 | 2005-12-05 13:42:06 -0800 | [diff] [blame] | 40 | /* Reasonable defaults, I hope, based on tcp's defaults */ |
Eric Dumazet | 8d987e5 | 2010-11-09 23:24:26 +0000 | [diff] [blame] | 41 | long sysctl_decnet_mem[3] = { 768 << 3, 1024 << 3, 1536 << 3 }; |
Steven Whitehouse | 1f12bcc9 | 2005-12-05 13:42:06 -0800 | [diff] [blame] | 42 | int sysctl_decnet_wmem[3] = { 4 * 1024, 16 * 1024, 128 * 1024 }; |
| 43 | int sysctl_decnet_rmem[3] = { 4 * 1024, 87380, 87380 * 2 }; |
| 44 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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(;;) { |
Joe Perches | 06f8fe1 | 2011-07-01 09:43:03 +0000 | [diff] [blame] | 71 | switch (*str) { |
| 72 | case ' ': |
| 73 | case '\n': |
| 74 | case '\r': |
| 75 | case ':': |
| 76 | *str = 0; |
| 77 | /* Fallthrough */ |
| 78 | case 0: |
| 79 | return; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 80 | } |
| 81 | str++; |
| 82 | } |
| 83 | } |
| 84 | |
| 85 | /* |
| 86 | * Simple routine to parse an ascii DECnet address |
| 87 | * into a network order address. |
| 88 | */ |
Steven Whitehouse | c4ea94a | 2006-03-20 22:42:39 -0800 | [diff] [blame] | 89 | static int parse_addr(__le16 *addr, char *str) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 90 | { |
Steven Whitehouse | c4ea94a | 2006-03-20 22:42:39 -0800 | [diff] [blame] | 91 | __u16 area, node; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 | |
Harvey Harrison | c4106aa | 2008-11-27 00:12:47 -0800 | [diff] [blame] | 130 | *addr = cpu_to_le16((area << 10) | node); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 131 | |
| 132 | return 0; |
| 133 | } |
| 134 | |
YOSHIFUJI Hideaki | 429eb0f | 2007-02-09 23:24:40 +0900 | [diff] [blame] | 135 | static int dn_node_address_handler(ctl_table *table, int write, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 136 | void __user *buffer, |
| 137 | size_t *lenp, loff_t *ppos) |
| 138 | { |
| 139 | char addr[DN_ASCBUF_LEN]; |
| 140 | size_t len; |
Steven Whitehouse | c4ea94a | 2006-03-20 22:42:39 -0800 | [diff] [blame] | 141 | __le16 dnaddr; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 142 | |
| 143 | if (!*lenp || (*ppos && !write)) { |
| 144 | *lenp = 0; |
| 145 | return 0; |
| 146 | } |
| 147 | |
| 148 | if (write) { |
Hannes Eder | e57c624 | 2009-02-25 10:32:39 +0000 | [diff] [blame] | 149 | len = (*lenp < DN_ASCBUF_LEN) ? *lenp : (DN_ASCBUF_LEN-1); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 | |
Harvey Harrison | c4106aa | 2008-11-27 00:12:47 -0800 | [diff] [blame] | 171 | dn_addr2asc(le16_to_cpu(decnet_address), addr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 | |
YOSHIFUJI Hideaki | 429eb0f | 2007-02-09 23:24:40 +0900 | [diff] [blame] | 186 | static int dn_def_dev_handler(ctl_table *table, int write, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 | |
Eric W. Biederman | 881d966 | 2007-09-17 11:56:21 -0700 | [diff] [blame] | 209 | dev = dev_get_by_name(&init_net, devname); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 | |
| 249 | static ctl_table dn_table[] = { |
| 250 | { |
YOSHIFUJI Hideaki | 429eb0f | 2007-02-09 23:24:40 +0900 | [diff] [blame] | 251 | .procname = "node_address", |
| 252 | .maxlen = 7, |
| 253 | .mode = 0644, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 254 | .proc_handler = dn_node_address_handler, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 255 | }, |
| 256 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 257 | .procname = "node_name", |
YOSHIFUJI Hideaki | 429eb0f | 2007-02-09 23:24:40 +0900 | [diff] [blame] | 258 | .data = node_name, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 259 | .maxlen = 7, |
| 260 | .mode = 0644, |
Alexey Dobriyan | 6d9f239 | 2008-11-03 18:21:05 -0800 | [diff] [blame] | 261 | .proc_handler = proc_dostring, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 262 | }, |
| 263 | { |
YOSHIFUJI Hideaki | 429eb0f | 2007-02-09 23:24:40 +0900 | [diff] [blame] | 264 | .procname = "default_device", |
| 265 | .maxlen = 16, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 266 | .mode = 0644, |
| 267 | .proc_handler = dn_def_dev_handler, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 268 | }, |
| 269 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 270 | .procname = "time_wait", |
| 271 | .data = &decnet_time_wait, |
| 272 | .maxlen = sizeof(int), |
| 273 | .mode = 0644, |
Alexey Dobriyan | 6d9f239 | 2008-11-03 18:21:05 -0800 | [diff] [blame] | 274 | .proc_handler = proc_dointvec_minmax, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 275 | .extra1 = &min_decnet_time_wait, |
| 276 | .extra2 = &max_decnet_time_wait |
| 277 | }, |
| 278 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 279 | .procname = "dn_count", |
| 280 | .data = &decnet_dn_count, |
| 281 | .maxlen = sizeof(int), |
| 282 | .mode = 0644, |
Alexey Dobriyan | 6d9f239 | 2008-11-03 18:21:05 -0800 | [diff] [blame] | 283 | .proc_handler = proc_dointvec_minmax, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 284 | .extra1 = &min_state_count, |
| 285 | .extra2 = &max_state_count |
| 286 | }, |
| 287 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 288 | .procname = "di_count", |
| 289 | .data = &decnet_di_count, |
| 290 | .maxlen = sizeof(int), |
| 291 | .mode = 0644, |
Alexey Dobriyan | 6d9f239 | 2008-11-03 18:21:05 -0800 | [diff] [blame] | 292 | .proc_handler = proc_dointvec_minmax, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 293 | .extra1 = &min_state_count, |
| 294 | .extra2 = &max_state_count |
| 295 | }, |
| 296 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 297 | .procname = "dr_count", |
| 298 | .data = &decnet_dr_count, |
| 299 | .maxlen = sizeof(int), |
| 300 | .mode = 0644, |
Alexey Dobriyan | 6d9f239 | 2008-11-03 18:21:05 -0800 | [diff] [blame] | 301 | .proc_handler = proc_dointvec_minmax, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 302 | .extra1 = &min_state_count, |
| 303 | .extra2 = &max_state_count |
| 304 | }, |
| 305 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 306 | .procname = "dst_gc_interval", |
| 307 | .data = &decnet_dst_gc_interval, |
| 308 | .maxlen = sizeof(int), |
| 309 | .mode = 0644, |
Alexey Dobriyan | 6d9f239 | 2008-11-03 18:21:05 -0800 | [diff] [blame] | 310 | .proc_handler = proc_dointvec_minmax, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 311 | .extra1 = &min_decnet_dst_gc_interval, |
| 312 | .extra2 = &max_decnet_dst_gc_interval |
| 313 | }, |
| 314 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 315 | .procname = "no_fc_max_cwnd", |
| 316 | .data = &decnet_no_fc_max_cwnd, |
| 317 | .maxlen = sizeof(int), |
| 318 | .mode = 0644, |
Alexey Dobriyan | 6d9f239 | 2008-11-03 18:21:05 -0800 | [diff] [blame] | 319 | .proc_handler = proc_dointvec_minmax, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 320 | .extra1 = &min_decnet_no_fc_max_cwnd, |
| 321 | .extra2 = &max_decnet_no_fc_max_cwnd |
| 322 | }, |
Steven Whitehouse | 1f12bcc9 | 2005-12-05 13:42:06 -0800 | [diff] [blame] | 323 | { |
YOSHIFUJI Hideaki | 429eb0f | 2007-02-09 23:24:40 +0900 | [diff] [blame] | 324 | .procname = "decnet_mem", |
| 325 | .data = &sysctl_decnet_mem, |
| 326 | .maxlen = sizeof(sysctl_decnet_mem), |
| 327 | .mode = 0644, |
Eric Dumazet | 8d987e5 | 2010-11-09 23:24:26 +0000 | [diff] [blame] | 328 | .proc_handler = proc_doulongvec_minmax |
YOSHIFUJI Hideaki | 429eb0f | 2007-02-09 23:24:40 +0900 | [diff] [blame] | 329 | }, |
| 330 | { |
YOSHIFUJI Hideaki | 429eb0f | 2007-02-09 23:24:40 +0900 | [diff] [blame] | 331 | .procname = "decnet_rmem", |
| 332 | .data = &sysctl_decnet_rmem, |
| 333 | .maxlen = sizeof(sysctl_decnet_rmem), |
| 334 | .mode = 0644, |
Alexey Dobriyan | 6d9f239 | 2008-11-03 18:21:05 -0800 | [diff] [blame] | 335 | .proc_handler = proc_dointvec, |
YOSHIFUJI Hideaki | 429eb0f | 2007-02-09 23:24:40 +0900 | [diff] [blame] | 336 | }, |
| 337 | { |
YOSHIFUJI Hideaki | 429eb0f | 2007-02-09 23:24:40 +0900 | [diff] [blame] | 338 | .procname = "decnet_wmem", |
| 339 | .data = &sysctl_decnet_wmem, |
| 340 | .maxlen = sizeof(sysctl_decnet_wmem), |
| 341 | .mode = 0644, |
Alexey Dobriyan | 6d9f239 | 2008-11-03 18:21:05 -0800 | [diff] [blame] | 342 | .proc_handler = proc_dointvec, |
YOSHIFUJI Hideaki | 429eb0f | 2007-02-09 23:24:40 +0900 | [diff] [blame] | 343 | }, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 344 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 345 | .procname = "debug", |
| 346 | .data = &decnet_debug_level, |
| 347 | .maxlen = sizeof(int), |
| 348 | .mode = 0644, |
Alexey Dobriyan | 6d9f239 | 2008-11-03 18:21:05 -0800 | [diff] [blame] | 349 | .proc_handler = proc_dointvec, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 350 | }, |
Eric W. Biederman | f8572d8 | 2009-11-05 13:32:03 -0800 | [diff] [blame] | 351 | { } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 352 | }; |
| 353 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 354 | void dn_register_sysctl(void) |
| 355 | { |
Eric W. Biederman | 9bdcc88 | 2012-04-19 13:40:37 +0000 | [diff] [blame] | 356 | dn_table_header = register_net_sysctl(&init_net, "net/decnet", dn_table); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 357 | } |
| 358 | |
| 359 | void dn_unregister_sysctl(void) |
| 360 | { |
Eric W. Biederman | 5dd3df1 | 2012-04-19 13:24:33 +0000 | [diff] [blame] | 361 | unregister_net_sysctl_table(dn_table_header); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 |