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 | 1f12bcc | 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 | 1f12bcc | 2005-12-05 13:42:06 -0800 | [diff] [blame] | 40 | /* Reasonable defaults, I hope, based on tcp's defaults */ |
| 41 | int 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 }; |
| 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(;;) { |
| 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 | */ |
Steven Whitehouse | c4ea94a | 2006-03-20 22:42:39 -0800 | [diff] [blame] | 88 | static int parse_addr(__le16 *addr, char *str) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 89 | { |
Steven Whitehouse | c4ea94a | 2006-03-20 22:42:39 -0800 | [diff] [blame] | 90 | __u16 area, node; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 | |
| 129 | *addr = dn_htons((area << 10) | node); |
| 130 | |
| 131 | return 0; |
| 132 | } |
| 133 | |
| 134 | |
| 135 | static int dn_node_address_strategy(ctl_table *table, int __user *name, int nlen, |
| 136 | void __user *oldval, size_t __user *oldlenp, |
| 137 | void __user *newval, size_t newlen, |
| 138 | void **context) |
| 139 | { |
| 140 | size_t len; |
Steven Whitehouse | c4ea94a | 2006-03-20 22:42:39 -0800 | [diff] [blame] | 141 | __le16 addr; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 142 | |
| 143 | if (oldval && oldlenp) { |
| 144 | if (get_user(len, oldlenp)) |
| 145 | return -EFAULT; |
| 146 | if (len) { |
| 147 | if (len != sizeof(unsigned short)) |
| 148 | return -EINVAL; |
Steven Whitehouse | c4ea94a | 2006-03-20 22:42:39 -0800 | [diff] [blame] | 149 | if (put_user(decnet_address, (__le16 __user *)oldval)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 150 | return -EFAULT; |
| 151 | } |
| 152 | } |
| 153 | if (newval && newlen) { |
| 154 | if (newlen != sizeof(unsigned short)) |
| 155 | return -EINVAL; |
Steven Whitehouse | c4ea94a | 2006-03-20 22:42:39 -0800 | [diff] [blame] | 156 | if (get_user(addr, (__le16 __user *)newval)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 157 | return -EFAULT; |
| 158 | |
| 159 | dn_dev_devices_off(); |
| 160 | |
| 161 | decnet_address = addr; |
| 162 | |
| 163 | dn_dev_devices_on(); |
| 164 | } |
| 165 | return 0; |
| 166 | } |
| 167 | |
| 168 | static int dn_node_address_handler(ctl_table *table, int write, |
| 169 | struct file *filp, |
| 170 | void __user *buffer, |
| 171 | size_t *lenp, loff_t *ppos) |
| 172 | { |
| 173 | char addr[DN_ASCBUF_LEN]; |
| 174 | size_t len; |
Steven Whitehouse | c4ea94a | 2006-03-20 22:42:39 -0800 | [diff] [blame] | 175 | __le16 dnaddr; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 176 | |
| 177 | if (!*lenp || (*ppos && !write)) { |
| 178 | *lenp = 0; |
| 179 | return 0; |
| 180 | } |
| 181 | |
| 182 | if (write) { |
| 183 | int len = (*lenp < DN_ASCBUF_LEN) ? *lenp : (DN_ASCBUF_LEN-1); |
| 184 | |
| 185 | if (copy_from_user(addr, buffer, len)) |
| 186 | return -EFAULT; |
| 187 | |
| 188 | addr[len] = 0; |
| 189 | strip_it(addr); |
| 190 | |
| 191 | if (parse_addr(&dnaddr, addr)) |
| 192 | return -EINVAL; |
| 193 | |
| 194 | dn_dev_devices_off(); |
| 195 | |
| 196 | decnet_address = dnaddr; |
| 197 | |
| 198 | dn_dev_devices_on(); |
| 199 | |
| 200 | *ppos += len; |
| 201 | |
| 202 | return 0; |
| 203 | } |
| 204 | |
| 205 | dn_addr2asc(dn_ntohs(decnet_address), addr); |
| 206 | len = strlen(addr); |
| 207 | addr[len++] = '\n'; |
| 208 | |
| 209 | if (len > *lenp) len = *lenp; |
| 210 | |
| 211 | if (copy_to_user(buffer, addr, len)) |
| 212 | return -EFAULT; |
| 213 | |
| 214 | *lenp = len; |
| 215 | *ppos += len; |
| 216 | |
| 217 | return 0; |
| 218 | } |
| 219 | |
| 220 | |
| 221 | static int dn_def_dev_strategy(ctl_table *table, int __user *name, int nlen, |
| 222 | void __user *oldval, size_t __user *oldlenp, |
| 223 | void __user *newval, size_t newlen, |
| 224 | void **context) |
| 225 | { |
| 226 | size_t len; |
| 227 | struct net_device *dev; |
| 228 | char devname[17]; |
| 229 | size_t namel; |
| 230 | int rv = 0; |
| 231 | |
| 232 | devname[0] = 0; |
| 233 | |
| 234 | if (oldval && oldlenp) { |
| 235 | if (get_user(len, oldlenp)) |
| 236 | return -EFAULT; |
| 237 | if (len) { |
| 238 | dev = dn_dev_get_default(); |
| 239 | if (dev) { |
| 240 | strcpy(devname, dev->name); |
| 241 | dev_put(dev); |
| 242 | } |
| 243 | |
| 244 | namel = strlen(devname) + 1; |
| 245 | if (len > namel) len = namel; |
| 246 | |
| 247 | if (copy_to_user(oldval, devname, len)) |
| 248 | return -EFAULT; |
| 249 | |
| 250 | if (put_user(len, oldlenp)) |
| 251 | return -EFAULT; |
| 252 | } |
| 253 | } |
| 254 | |
| 255 | if (newval && newlen) { |
| 256 | if (newlen > 16) |
| 257 | return -E2BIG; |
| 258 | |
| 259 | if (copy_from_user(devname, newval, newlen)) |
| 260 | return -EFAULT; |
| 261 | |
| 262 | devname[newlen] = 0; |
| 263 | |
| 264 | dev = dev_get_by_name(devname); |
| 265 | if (dev == NULL) |
| 266 | return -ENODEV; |
| 267 | |
| 268 | rv = -ENODEV; |
| 269 | if (dev->dn_ptr != NULL) { |
| 270 | rv = dn_dev_set_default(dev, 1); |
| 271 | if (rv) |
| 272 | dev_put(dev); |
| 273 | } |
| 274 | } |
| 275 | |
| 276 | return rv; |
| 277 | } |
| 278 | |
| 279 | |
| 280 | static int dn_def_dev_handler(ctl_table *table, int write, |
| 281 | struct file * filp, |
| 282 | void __user *buffer, |
| 283 | size_t *lenp, loff_t *ppos) |
| 284 | { |
| 285 | size_t len; |
| 286 | struct net_device *dev; |
| 287 | char devname[17]; |
| 288 | |
| 289 | if (!*lenp || (*ppos && !write)) { |
| 290 | *lenp = 0; |
| 291 | return 0; |
| 292 | } |
| 293 | |
| 294 | if (write) { |
| 295 | if (*lenp > 16) |
| 296 | return -E2BIG; |
| 297 | |
| 298 | if (copy_from_user(devname, buffer, *lenp)) |
| 299 | return -EFAULT; |
| 300 | |
| 301 | devname[*lenp] = 0; |
| 302 | strip_it(devname); |
| 303 | |
| 304 | dev = dev_get_by_name(devname); |
| 305 | if (dev == NULL) |
| 306 | return -ENODEV; |
| 307 | |
| 308 | if (dev->dn_ptr == NULL) { |
| 309 | dev_put(dev); |
| 310 | return -ENODEV; |
| 311 | } |
| 312 | |
| 313 | if (dn_dev_set_default(dev, 1)) { |
| 314 | dev_put(dev); |
| 315 | return -ENODEV; |
| 316 | } |
| 317 | *ppos += *lenp; |
| 318 | |
| 319 | return 0; |
| 320 | } |
| 321 | |
| 322 | dev = dn_dev_get_default(); |
| 323 | if (dev == NULL) { |
| 324 | *lenp = 0; |
| 325 | return 0; |
| 326 | } |
| 327 | |
| 328 | strcpy(devname, dev->name); |
| 329 | dev_put(dev); |
| 330 | len = strlen(devname); |
| 331 | devname[len++] = '\n'; |
| 332 | |
| 333 | if (len > *lenp) len = *lenp; |
| 334 | |
| 335 | if (copy_to_user(buffer, devname, len)) |
| 336 | return -EFAULT; |
| 337 | |
| 338 | *lenp = len; |
| 339 | *ppos += len; |
| 340 | |
| 341 | return 0; |
| 342 | } |
| 343 | |
| 344 | static ctl_table dn_table[] = { |
| 345 | { |
| 346 | .ctl_name = NET_DECNET_NODE_ADDRESS, |
| 347 | .procname = "node_address", |
| 348 | .maxlen = 7, |
| 349 | .mode = 0644, |
| 350 | .proc_handler = dn_node_address_handler, |
| 351 | .strategy = dn_node_address_strategy, |
| 352 | }, |
| 353 | { |
| 354 | .ctl_name = NET_DECNET_NODE_NAME, |
| 355 | .procname = "node_name", |
| 356 | .data = node_name, |
| 357 | .maxlen = 7, |
| 358 | .mode = 0644, |
| 359 | .proc_handler = &proc_dostring, |
| 360 | .strategy = &sysctl_string, |
| 361 | }, |
| 362 | { |
| 363 | .ctl_name = NET_DECNET_DEFAULT_DEVICE, |
| 364 | .procname = "default_device", |
| 365 | .maxlen = 16, |
| 366 | .mode = 0644, |
| 367 | .proc_handler = dn_def_dev_handler, |
| 368 | .strategy = dn_def_dev_strategy, |
| 369 | }, |
| 370 | { |
| 371 | .ctl_name = NET_DECNET_TIME_WAIT, |
| 372 | .procname = "time_wait", |
| 373 | .data = &decnet_time_wait, |
| 374 | .maxlen = sizeof(int), |
| 375 | .mode = 0644, |
| 376 | .proc_handler = &proc_dointvec_minmax, |
| 377 | .strategy = &sysctl_intvec, |
| 378 | .extra1 = &min_decnet_time_wait, |
| 379 | .extra2 = &max_decnet_time_wait |
| 380 | }, |
| 381 | { |
| 382 | .ctl_name = NET_DECNET_DN_COUNT, |
| 383 | .procname = "dn_count", |
| 384 | .data = &decnet_dn_count, |
| 385 | .maxlen = sizeof(int), |
| 386 | .mode = 0644, |
| 387 | .proc_handler = &proc_dointvec_minmax, |
| 388 | .strategy = &sysctl_intvec, |
| 389 | .extra1 = &min_state_count, |
| 390 | .extra2 = &max_state_count |
| 391 | }, |
| 392 | { |
| 393 | .ctl_name = NET_DECNET_DI_COUNT, |
| 394 | .procname = "di_count", |
| 395 | .data = &decnet_di_count, |
| 396 | .maxlen = sizeof(int), |
| 397 | .mode = 0644, |
| 398 | .proc_handler = &proc_dointvec_minmax, |
| 399 | .strategy = &sysctl_intvec, |
| 400 | .extra1 = &min_state_count, |
| 401 | .extra2 = &max_state_count |
| 402 | }, |
| 403 | { |
| 404 | .ctl_name = NET_DECNET_DR_COUNT, |
| 405 | .procname = "dr_count", |
| 406 | .data = &decnet_dr_count, |
| 407 | .maxlen = sizeof(int), |
| 408 | .mode = 0644, |
| 409 | .proc_handler = &proc_dointvec_minmax, |
| 410 | .strategy = &sysctl_intvec, |
| 411 | .extra1 = &min_state_count, |
| 412 | .extra2 = &max_state_count |
| 413 | }, |
| 414 | { |
| 415 | .ctl_name = NET_DECNET_DST_GC_INTERVAL, |
| 416 | .procname = "dst_gc_interval", |
| 417 | .data = &decnet_dst_gc_interval, |
| 418 | .maxlen = sizeof(int), |
| 419 | .mode = 0644, |
| 420 | .proc_handler = &proc_dointvec_minmax, |
| 421 | .strategy = &sysctl_intvec, |
| 422 | .extra1 = &min_decnet_dst_gc_interval, |
| 423 | .extra2 = &max_decnet_dst_gc_interval |
| 424 | }, |
| 425 | { |
| 426 | .ctl_name = NET_DECNET_NO_FC_MAX_CWND, |
| 427 | .procname = "no_fc_max_cwnd", |
| 428 | .data = &decnet_no_fc_max_cwnd, |
| 429 | .maxlen = sizeof(int), |
| 430 | .mode = 0644, |
| 431 | .proc_handler = &proc_dointvec_minmax, |
| 432 | .strategy = &sysctl_intvec, |
| 433 | .extra1 = &min_decnet_no_fc_max_cwnd, |
| 434 | .extra2 = &max_decnet_no_fc_max_cwnd |
| 435 | }, |
Steven Whitehouse | 1f12bcc | 2005-12-05 13:42:06 -0800 | [diff] [blame] | 436 | { |
| 437 | .ctl_name = NET_DECNET_MEM, |
| 438 | .procname = "decnet_mem", |
| 439 | .data = &sysctl_decnet_mem, |
| 440 | .maxlen = sizeof(sysctl_decnet_mem), |
| 441 | .mode = 0644, |
| 442 | .proc_handler = &proc_dointvec, |
| 443 | .strategy = &sysctl_intvec, |
| 444 | }, |
| 445 | { |
| 446 | .ctl_name = NET_DECNET_RMEM, |
| 447 | .procname = "decnet_rmem", |
| 448 | .data = &sysctl_decnet_rmem, |
| 449 | .maxlen = sizeof(sysctl_decnet_rmem), |
| 450 | .mode = 0644, |
| 451 | .proc_handler = &proc_dointvec, |
| 452 | .strategy = &sysctl_intvec, |
| 453 | }, |
| 454 | { |
| 455 | .ctl_name = NET_DECNET_WMEM, |
| 456 | .procname = "decnet_wmem", |
| 457 | .data = &sysctl_decnet_wmem, |
| 458 | .maxlen = sizeof(sysctl_decnet_wmem), |
| 459 | .mode = 0644, |
| 460 | .proc_handler = &proc_dointvec, |
| 461 | .strategy = &sysctl_intvec, |
| 462 | }, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 463 | { |
| 464 | .ctl_name = NET_DECNET_DEBUG_LEVEL, |
| 465 | .procname = "debug", |
| 466 | .data = &decnet_debug_level, |
| 467 | .maxlen = sizeof(int), |
| 468 | .mode = 0644, |
| 469 | .proc_handler = &proc_dointvec, |
| 470 | .strategy = &sysctl_intvec, |
| 471 | }, |
| 472 | {0} |
| 473 | }; |
| 474 | |
| 475 | static ctl_table dn_dir_table[] = { |
| 476 | { |
| 477 | .ctl_name = NET_DECNET, |
| 478 | .procname = "decnet", |
| 479 | .mode = 0555, |
| 480 | .child = dn_table}, |
| 481 | {0} |
| 482 | }; |
| 483 | |
| 484 | static ctl_table dn_root_table[] = { |
| 485 | { |
| 486 | .ctl_name = CTL_NET, |
| 487 | .procname = "net", |
| 488 | .mode = 0555, |
| 489 | .child = dn_dir_table |
| 490 | }, |
| 491 | {0} |
| 492 | }; |
| 493 | |
| 494 | void dn_register_sysctl(void) |
| 495 | { |
| 496 | dn_table_header = register_sysctl_table(dn_root_table, 1); |
| 497 | } |
| 498 | |
| 499 | void dn_unregister_sysctl(void) |
| 500 | { |
| 501 | unregister_sysctl_table(dn_table_header); |
| 502 | } |
| 503 | |
| 504 | #else /* CONFIG_SYSCTL */ |
| 505 | void dn_unregister_sysctl(void) |
| 506 | { |
| 507 | } |
| 508 | void dn_register_sysctl(void) |
| 509 | { |
| 510 | } |
| 511 | |
| 512 | #endif |