Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* $Id: inode.c,v 1.15 2001/11/12 09:43:39 davem Exp $ |
| 2 | * openpromfs.c: /proc/openprom handling routines |
| 3 | * |
| 4 | * Copyright (C) 1996-1999 Jakub Jelinek (jakub@redhat.com) |
| 5 | * Copyright (C) 1998 Eddie C. Dost (ecd@skynet.be) |
| 6 | */ |
| 7 | |
| 8 | #include <linux/module.h> |
| 9 | #include <linux/types.h> |
| 10 | #include <linux/string.h> |
| 11 | #include <linux/fs.h> |
| 12 | #include <linux/openprom_fs.h> |
| 13 | #include <linux/init.h> |
| 14 | #include <linux/slab.h> |
| 15 | #include <linux/smp_lock.h> |
| 16 | |
| 17 | #include <asm/openprom.h> |
| 18 | #include <asm/oplib.h> |
| 19 | #include <asm/uaccess.h> |
| 20 | |
| 21 | #define ALIASES_NNODES 64 |
| 22 | |
| 23 | typedef struct { |
| 24 | u16 parent; |
| 25 | u16 next; |
| 26 | u16 child; |
| 27 | u16 first_prop; |
| 28 | u32 node; |
| 29 | } openpromfs_node; |
| 30 | |
| 31 | typedef struct { |
| 32 | #define OPP_STRING 0x10 |
| 33 | #define OPP_STRINGLIST 0x20 |
| 34 | #define OPP_BINARY 0x40 |
| 35 | #define OPP_HEXSTRING 0x80 |
| 36 | #define OPP_DIRTY 0x01 |
| 37 | #define OPP_QUOTED 0x02 |
| 38 | #define OPP_NOTQUOTED 0x04 |
| 39 | #define OPP_ASCIIZ 0x08 |
| 40 | u32 flag; |
| 41 | u32 alloclen; |
| 42 | u32 len; |
| 43 | char *value; |
| 44 | char name[8]; |
| 45 | } openprom_property; |
| 46 | |
| 47 | static openpromfs_node *nodes; |
| 48 | static int alloced; |
| 49 | static u16 last_node; |
| 50 | static u16 first_prop; |
| 51 | static u16 options = 0xffff; |
| 52 | static u16 aliases = 0xffff; |
| 53 | static int aliases_nodes; |
| 54 | static char *alias_names [ALIASES_NNODES]; |
| 55 | |
| 56 | #define OPENPROM_ROOT_INO 16 |
| 57 | #define OPENPROM_FIRST_INO OPENPROM_ROOT_INO |
| 58 | #define NODE(ino) nodes[ino - OPENPROM_FIRST_INO] |
| 59 | #define NODE2INO(node) (node + OPENPROM_FIRST_INO) |
| 60 | #define NODEP2INO(no) (no + OPENPROM_FIRST_INO + last_node) |
| 61 | |
| 62 | static int openpromfs_create (struct inode *, struct dentry *, int, struct nameidata *); |
| 63 | static int openpromfs_readdir(struct file *, void *, filldir_t); |
| 64 | static struct dentry *openpromfs_lookup(struct inode *, struct dentry *dentry, struct nameidata *nd); |
| 65 | static int openpromfs_unlink (struct inode *, struct dentry *dentry); |
| 66 | |
Jan Engelhardt | a04ee14 | 2006-06-25 05:47:36 -0700 | [diff] [blame^] | 67 | static inline u16 ptr_nod(void *p) |
| 68 | { |
| 69 | return (long)p & 0xFFFF; |
| 70 | } |
| 71 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 72 | static ssize_t nodenum_read(struct file *file, char __user *buf, |
| 73 | size_t count, loff_t *ppos) |
| 74 | { |
| 75 | struct inode *inode = file->f_dentry->d_inode; |
| 76 | char buffer[10]; |
| 77 | |
| 78 | if (count < 0 || !inode->u.generic_ip) |
| 79 | return -EINVAL; |
Jan Engelhardt | 515decd | 2006-06-25 05:47:35 -0700 | [diff] [blame] | 80 | sprintf (buffer, "%8.8lx\n", (long)inode->u.generic_ip); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 81 | if (file->f_pos >= 9) |
| 82 | return 0; |
| 83 | if (count > 9 - file->f_pos) |
| 84 | count = 9 - file->f_pos; |
| 85 | if (copy_to_user(buf, buffer + file->f_pos, count)) |
| 86 | return -EFAULT; |
| 87 | *ppos += count; |
| 88 | return count; |
| 89 | } |
| 90 | |
| 91 | static ssize_t property_read(struct file *filp, char __user *buf, |
| 92 | size_t count, loff_t *ppos) |
| 93 | { |
| 94 | struct inode *inode = filp->f_dentry->d_inode; |
| 95 | int i, j, k; |
| 96 | u32 node; |
| 97 | char *p, *s; |
| 98 | u32 *q; |
| 99 | openprom_property *op; |
| 100 | char buffer[64]; |
| 101 | |
| 102 | if (!filp->private_data) { |
Jan Engelhardt | a04ee14 | 2006-06-25 05:47:36 -0700 | [diff] [blame^] | 103 | node = nodes[ptr_nod(inode->u.generic_ip)].node; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 104 | i = ((u32)(long)inode->u.generic_ip) >> 16; |
Jan Engelhardt | a04ee14 | 2006-06-25 05:47:36 -0700 | [diff] [blame^] | 105 | if (ptr_nod(inode->u.generic_ip) == aliases) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 106 | if (i >= aliases_nodes) |
| 107 | p = NULL; |
| 108 | else |
| 109 | p = alias_names [i]; |
| 110 | } else |
| 111 | for (p = prom_firstprop (node, buffer); |
| 112 | i && p && *p; |
| 113 | p = prom_nextprop (node, p, buffer), i--) |
| 114 | /* nothing */ ; |
| 115 | if (!p || !*p) |
| 116 | return -EIO; |
| 117 | i = prom_getproplen (node, p); |
| 118 | if (i < 0) { |
Jan Engelhardt | a04ee14 | 2006-06-25 05:47:36 -0700 | [diff] [blame^] | 119 | if (ptr_nod(inode->u.generic_ip) == aliases) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 120 | i = 0; |
| 121 | else |
| 122 | return -EIO; |
| 123 | } |
| 124 | k = i; |
| 125 | if (i < 64) i = 64; |
| 126 | filp->private_data = kmalloc (sizeof (openprom_property) |
| 127 | + (j = strlen (p)) + 2 * i, |
| 128 | GFP_KERNEL); |
| 129 | if (!filp->private_data) |
| 130 | return -ENOMEM; |
Jan Engelhardt | 515decd | 2006-06-25 05:47:35 -0700 | [diff] [blame] | 131 | op = filp->private_data; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 132 | op->flag = 0; |
| 133 | op->alloclen = 2 * i; |
| 134 | strcpy (op->name, p); |
| 135 | op->value = (char *)(((unsigned long)(op->name + j + 4)) & ~3); |
| 136 | op->len = k; |
| 137 | if (k && prom_getproperty (node, p, op->value, i) < 0) |
| 138 | return -EIO; |
| 139 | op->value [k] = 0; |
| 140 | if (k) { |
| 141 | for (s = NULL, p = op->value; p < op->value + k; p++) { |
| 142 | if ((*p >= ' ' && *p <= '~') || *p == '\n') { |
| 143 | op->flag |= OPP_STRING; |
| 144 | s = p; |
| 145 | continue; |
| 146 | } |
| 147 | if (p > op->value && !*p && s == p - 1) { |
| 148 | if (p < op->value + k - 1) |
| 149 | op->flag |= OPP_STRINGLIST; |
| 150 | else |
| 151 | op->flag |= OPP_ASCIIZ; |
| 152 | continue; |
| 153 | } |
| 154 | if (k == 1 && !*p) { |
| 155 | op->flag |= (OPP_STRING|OPP_ASCIIZ); |
| 156 | break; |
| 157 | } |
| 158 | op->flag &= ~(OPP_STRING|OPP_STRINGLIST); |
| 159 | if (k & 3) |
| 160 | op->flag |= OPP_HEXSTRING; |
| 161 | else |
| 162 | op->flag |= OPP_BINARY; |
| 163 | break; |
| 164 | } |
| 165 | if (op->flag & OPP_STRINGLIST) |
| 166 | op->flag &= ~(OPP_STRING); |
| 167 | if (op->flag & OPP_ASCIIZ) |
| 168 | op->len--; |
| 169 | } |
| 170 | } else |
Jan Engelhardt | 515decd | 2006-06-25 05:47:35 -0700 | [diff] [blame] | 171 | op = filp->private_data; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 172 | if (!count || !(op->len || (op->flag & OPP_ASCIIZ))) |
| 173 | return 0; |
| 174 | if (*ppos >= 0xffffff || count >= 0xffffff) |
| 175 | return -EINVAL; |
| 176 | if (op->flag & OPP_STRINGLIST) { |
| 177 | for (k = 0, p = op->value; p < op->value + op->len; p++) |
| 178 | if (!*p) |
| 179 | k++; |
| 180 | i = op->len + 4 * k + 3; |
| 181 | } else if (op->flag & OPP_STRING) { |
| 182 | i = op->len + 3; |
| 183 | } else if (op->flag & OPP_BINARY) { |
| 184 | i = (op->len * 9) >> 2; |
| 185 | } else { |
| 186 | i = (op->len << 1) + 1; |
| 187 | } |
| 188 | k = *ppos; |
| 189 | if (k >= i) return 0; |
| 190 | if (count > i - k) count = i - k; |
| 191 | if (op->flag & OPP_STRING) { |
| 192 | if (!k) { |
| 193 | if (put_user('\'', buf)) |
| 194 | return -EFAULT; |
| 195 | k++; |
| 196 | count--; |
| 197 | } |
| 198 | |
| 199 | if (k + count >= i - 2) |
| 200 | j = i - 2 - k; |
| 201 | else |
| 202 | j = count; |
| 203 | |
| 204 | if (j >= 0) { |
| 205 | if (copy_to_user(buf + k - *ppos, |
| 206 | op->value + k - 1, j)) |
| 207 | return -EFAULT; |
| 208 | count -= j; |
| 209 | k += j; |
| 210 | } |
| 211 | |
| 212 | if (count) { |
| 213 | if (put_user('\'', &buf [k++ - *ppos])) |
| 214 | return -EFAULT; |
| 215 | } |
| 216 | if (count > 1) { |
| 217 | if (put_user('\n', &buf [k++ - *ppos])) |
| 218 | return -EFAULT; |
| 219 | } |
| 220 | } else if (op->flag & OPP_STRINGLIST) { |
| 221 | char *tmp; |
| 222 | |
| 223 | tmp = kmalloc (i, GFP_KERNEL); |
| 224 | if (!tmp) |
| 225 | return -ENOMEM; |
| 226 | |
| 227 | s = tmp; |
| 228 | *s++ = '\''; |
| 229 | for (p = op->value; p < op->value + op->len; p++) { |
| 230 | if (!*p) { |
| 231 | strcpy(s, "' + '"); |
| 232 | s += 5; |
| 233 | continue; |
| 234 | } |
| 235 | *s++ = *p; |
| 236 | } |
| 237 | strcpy(s, "'\n"); |
| 238 | |
| 239 | if (copy_to_user(buf, tmp + k, count)) |
| 240 | return -EFAULT; |
| 241 | |
| 242 | kfree(tmp); |
| 243 | k += count; |
| 244 | |
| 245 | } else if (op->flag & OPP_BINARY) { |
| 246 | char buffer[10]; |
| 247 | u32 *first, *last; |
| 248 | int first_off, last_cnt; |
| 249 | |
| 250 | first = ((u32 *)op->value) + k / 9; |
| 251 | first_off = k % 9; |
| 252 | last = ((u32 *)op->value) + (k + count - 1) / 9; |
| 253 | last_cnt = (k + count) % 9; |
| 254 | if (!last_cnt) last_cnt = 9; |
| 255 | |
| 256 | if (first == last) { |
| 257 | sprintf (buffer, "%08x.", *first); |
| 258 | if (copy_to_user(buf, buffer + first_off, |
| 259 | last_cnt - first_off)) |
| 260 | return -EFAULT; |
| 261 | buf += last_cnt - first_off; |
| 262 | } else { |
| 263 | for (q = first; q <= last; q++) { |
| 264 | sprintf (buffer, "%08x.", *q); |
| 265 | if (q == first) { |
| 266 | if (copy_to_user(buf, buffer + first_off, |
| 267 | 9 - first_off)) |
| 268 | return -EFAULT; |
| 269 | buf += 9 - first_off; |
| 270 | } else if (q == last) { |
| 271 | if (copy_to_user(buf, buffer, last_cnt)) |
| 272 | return -EFAULT; |
| 273 | buf += last_cnt; |
| 274 | } else { |
| 275 | if (copy_to_user(buf, buffer, 9)) |
| 276 | return -EFAULT; |
| 277 | buf += 9; |
| 278 | } |
| 279 | } |
| 280 | } |
| 281 | |
| 282 | if (last == (u32 *)(op->value + op->len - 4) && last_cnt == 9) { |
| 283 | if (put_user('\n', (buf - 1))) |
| 284 | return -EFAULT; |
| 285 | } |
| 286 | |
| 287 | k += count; |
| 288 | |
| 289 | } else if (op->flag & OPP_HEXSTRING) { |
| 290 | char buffer[3]; |
| 291 | |
| 292 | if ((k < i - 1) && (k & 1)) { |
| 293 | sprintf (buffer, "%02x", |
| 294 | (unsigned char) *(op->value + (k >> 1)) & 0xff); |
| 295 | if (put_user(buffer[1], &buf[k++ - *ppos])) |
| 296 | return -EFAULT; |
| 297 | count--; |
| 298 | } |
| 299 | |
| 300 | for (; (count > 1) && (k < i - 1); k += 2) { |
| 301 | sprintf (buffer, "%02x", |
| 302 | (unsigned char) *(op->value + (k >> 1)) & 0xff); |
| 303 | if (copy_to_user(buf + k - *ppos, buffer, 2)) |
| 304 | return -EFAULT; |
| 305 | count -= 2; |
| 306 | } |
| 307 | |
| 308 | if (count && (k < i - 1)) { |
| 309 | sprintf (buffer, "%02x", |
| 310 | (unsigned char) *(op->value + (k >> 1)) & 0xff); |
| 311 | if (put_user(buffer[0], &buf[k++ - *ppos])) |
| 312 | return -EFAULT; |
| 313 | count--; |
| 314 | } |
| 315 | |
| 316 | if (count) { |
| 317 | if (put_user('\n', &buf [k++ - *ppos])) |
| 318 | return -EFAULT; |
| 319 | } |
| 320 | } |
| 321 | count = k - *ppos; |
| 322 | *ppos = k; |
| 323 | return count; |
| 324 | } |
| 325 | |
| 326 | static ssize_t property_write(struct file *filp, const char __user *buf, |
| 327 | size_t count, loff_t *ppos) |
| 328 | { |
| 329 | int i, j, k; |
| 330 | char *p; |
| 331 | u32 *q; |
| 332 | void *b; |
| 333 | openprom_property *op; |
| 334 | |
| 335 | if (*ppos >= 0xffffff || count >= 0xffffff) |
| 336 | return -EINVAL; |
| 337 | if (!filp->private_data) { |
| 338 | i = property_read (filp, NULL, 0, NULL); |
| 339 | if (i) |
| 340 | return i; |
| 341 | } |
| 342 | k = *ppos; |
Jan Engelhardt | 515decd | 2006-06-25 05:47:35 -0700 | [diff] [blame] | 343 | op = filp->private_data; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 344 | if (!(op->flag & OPP_STRING)) { |
| 345 | u32 *first, *last; |
| 346 | int first_off, last_cnt; |
| 347 | u32 mask, mask2; |
| 348 | char tmp [9]; |
| 349 | int forcelen = 0; |
| 350 | |
| 351 | j = k % 9; |
| 352 | for (i = 0; i < count; i++, j++) { |
| 353 | if (j == 9) j = 0; |
| 354 | if (!j) { |
| 355 | char ctmp; |
| 356 | if (get_user(ctmp, &buf[i])) |
| 357 | return -EFAULT; |
| 358 | if (ctmp != '.') { |
| 359 | if (ctmp != '\n') { |
| 360 | if (op->flag & OPP_BINARY) |
| 361 | return -EINVAL; |
| 362 | else |
| 363 | goto write_try_string; |
| 364 | } else { |
| 365 | count = i + 1; |
| 366 | forcelen = 1; |
| 367 | break; |
| 368 | } |
| 369 | } |
| 370 | } else { |
| 371 | char ctmp; |
| 372 | if (get_user(ctmp, &buf[i])) |
| 373 | return -EFAULT; |
| 374 | if (ctmp < '0' || |
| 375 | (ctmp > '9' && ctmp < 'A') || |
| 376 | (ctmp > 'F' && ctmp < 'a') || |
| 377 | ctmp > 'f') { |
| 378 | if (op->flag & OPP_BINARY) |
| 379 | return -EINVAL; |
| 380 | else |
| 381 | goto write_try_string; |
| 382 | } |
| 383 | } |
| 384 | } |
| 385 | op->flag |= OPP_BINARY; |
| 386 | tmp [8] = 0; |
| 387 | i = ((count + k + 8) / 9) << 2; |
| 388 | if (op->alloclen <= i) { |
| 389 | b = kmalloc (sizeof (openprom_property) + 2 * i, |
| 390 | GFP_KERNEL); |
| 391 | if (!b) |
| 392 | return -ENOMEM; |
| 393 | memcpy (b, filp->private_data, |
| 394 | sizeof (openprom_property) |
| 395 | + strlen (op->name) + op->alloclen); |
Jan Engelhardt | 515decd | 2006-06-25 05:47:35 -0700 | [diff] [blame] | 396 | memset (b + sizeof (openprom_property) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 397 | + strlen (op->name) + op->alloclen, |
| 398 | 0, 2 * i - op->alloclen); |
Jan Engelhardt | 515decd | 2006-06-25 05:47:35 -0700 | [diff] [blame] | 399 | op = b; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 400 | op->alloclen = 2*i; |
| 401 | b = filp->private_data; |
Jan Engelhardt | 515decd | 2006-06-25 05:47:35 -0700 | [diff] [blame] | 402 | filp->private_data = op; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 403 | kfree (b); |
| 404 | } |
| 405 | first = ((u32 *)op->value) + (k / 9); |
| 406 | first_off = k % 9; |
| 407 | last = (u32 *)(op->value + i); |
| 408 | last_cnt = (k + count) % 9; |
| 409 | if (first + 1 == last) { |
| 410 | memset (tmp, '0', 8); |
| 411 | if (copy_from_user(tmp + first_off, buf, |
| 412 | (count + first_off > 8) ? |
| 413 | 8 - first_off : count)) |
| 414 | return -EFAULT; |
| 415 | mask = 0xffffffff; |
| 416 | mask2 = 0xffffffff; |
| 417 | for (j = 0; j < first_off; j++) |
| 418 | mask >>= 1; |
| 419 | for (j = 8 - count - first_off; j > 0; j--) |
| 420 | mask2 <<= 1; |
| 421 | mask &= mask2; |
| 422 | if (mask) { |
| 423 | *first &= ~mask; |
| 424 | *first |= simple_strtoul (tmp, NULL, 16); |
| 425 | op->flag |= OPP_DIRTY; |
| 426 | } |
| 427 | } else { |
| 428 | op->flag |= OPP_DIRTY; |
| 429 | for (q = first; q < last; q++) { |
| 430 | if (q == first) { |
| 431 | if (first_off < 8) { |
| 432 | memset (tmp, '0', 8); |
| 433 | if (copy_from_user(tmp + first_off, |
| 434 | buf, |
| 435 | 8 - first_off)) |
| 436 | return -EFAULT; |
| 437 | mask = 0xffffffff; |
| 438 | for (j = 0; j < first_off; j++) |
| 439 | mask >>= 1; |
| 440 | *q &= ~mask; |
| 441 | *q |= simple_strtoul (tmp,NULL,16); |
| 442 | } |
| 443 | buf += 9; |
| 444 | } else if ((q == last - 1) && last_cnt |
| 445 | && (last_cnt < 8)) { |
| 446 | memset (tmp, '0', 8); |
| 447 | if (copy_from_user(tmp, buf, last_cnt)) |
| 448 | return -EFAULT; |
| 449 | mask = 0xffffffff; |
| 450 | for (j = 0; j < 8 - last_cnt; j++) |
| 451 | mask <<= 1; |
| 452 | *q &= ~mask; |
| 453 | *q |= simple_strtoul (tmp, NULL, 16); |
| 454 | buf += last_cnt; |
| 455 | } else { |
Jan Engelhardt | 0928d68 | 2006-06-25 05:47:35 -0700 | [diff] [blame] | 456 | char tchars[2 * sizeof(long) + 1]; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 457 | |
Jan Engelhardt | 0928d68 | 2006-06-25 05:47:35 -0700 | [diff] [blame] | 458 | if (copy_from_user(tchars, buf, sizeof(tchars) - 1)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 459 | return -EFAULT; |
Jan Engelhardt | 0928d68 | 2006-06-25 05:47:35 -0700 | [diff] [blame] | 460 | tchars[sizeof(tchars) - 1] = '\0'; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 461 | *q = simple_strtoul (tchars, NULL, 16); |
| 462 | buf += 9; |
| 463 | } |
| 464 | } |
| 465 | } |
| 466 | if (!forcelen) { |
| 467 | if (op->len < i) |
| 468 | op->len = i; |
| 469 | } else |
| 470 | op->len = i; |
| 471 | *ppos += count; |
| 472 | } |
| 473 | write_try_string: |
| 474 | if (!(op->flag & OPP_BINARY)) { |
| 475 | if (!(op->flag & (OPP_QUOTED | OPP_NOTQUOTED))) { |
| 476 | char ctmp; |
| 477 | |
| 478 | /* No way, if somebody starts writing from the middle, |
| 479 | * we don't know whether he uses quotes around or not |
| 480 | */ |
| 481 | if (k > 0) |
| 482 | return -EINVAL; |
| 483 | if (get_user(ctmp, buf)) |
| 484 | return -EFAULT; |
| 485 | if (ctmp == '\'') { |
| 486 | op->flag |= OPP_QUOTED; |
| 487 | buf++; |
| 488 | count--; |
| 489 | (*ppos)++; |
| 490 | if (!count) { |
| 491 | op->flag |= OPP_STRING; |
| 492 | return 1; |
| 493 | } |
| 494 | } else |
| 495 | op->flag |= OPP_NOTQUOTED; |
| 496 | } |
| 497 | op->flag |= OPP_STRING; |
| 498 | if (op->alloclen <= count + *ppos) { |
| 499 | b = kmalloc (sizeof (openprom_property) |
| 500 | + 2 * (count + *ppos), GFP_KERNEL); |
| 501 | if (!b) |
| 502 | return -ENOMEM; |
| 503 | memcpy (b, filp->private_data, |
| 504 | sizeof (openprom_property) |
| 505 | + strlen (op->name) + op->alloclen); |
Jan Engelhardt | 515decd | 2006-06-25 05:47:35 -0700 | [diff] [blame] | 506 | memset (b + sizeof (openprom_property) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 507 | + strlen (op->name) + op->alloclen, |
| 508 | 0, 2*(count - *ppos) - op->alloclen); |
Jan Engelhardt | 515decd | 2006-06-25 05:47:35 -0700 | [diff] [blame] | 509 | op = b; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 510 | op->alloclen = 2*(count + *ppos); |
| 511 | b = filp->private_data; |
Jan Engelhardt | 515decd | 2006-06-25 05:47:35 -0700 | [diff] [blame] | 512 | filp->private_data = op; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 513 | kfree (b); |
| 514 | } |
| 515 | p = op->value + *ppos - ((op->flag & OPP_QUOTED) ? 1 : 0); |
| 516 | if (copy_from_user(p, buf, count)) |
| 517 | return -EFAULT; |
| 518 | op->flag |= OPP_DIRTY; |
| 519 | for (i = 0; i < count; i++, p++) |
| 520 | if (*p == '\n') { |
| 521 | *p = 0; |
| 522 | break; |
| 523 | } |
| 524 | if (i < count) { |
| 525 | op->len = p - op->value; |
| 526 | *ppos += i + 1; |
| 527 | if ((p > op->value) && (op->flag & OPP_QUOTED) |
| 528 | && (*(p - 1) == '\'')) |
| 529 | op->len--; |
| 530 | } else { |
| 531 | if (p - op->value > op->len) |
| 532 | op->len = p - op->value; |
| 533 | *ppos += count; |
| 534 | } |
| 535 | } |
| 536 | return *ppos - k; |
| 537 | } |
| 538 | |
| 539 | int property_release (struct inode *inode, struct file *filp) |
| 540 | { |
Jan Engelhardt | 515decd | 2006-06-25 05:47:35 -0700 | [diff] [blame] | 541 | openprom_property *op = filp->private_data; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 542 | int error; |
| 543 | u32 node; |
| 544 | |
| 545 | if (!op) |
| 546 | return 0; |
| 547 | lock_kernel(); |
Jan Engelhardt | a04ee14 | 2006-06-25 05:47:36 -0700 | [diff] [blame^] | 548 | node = nodes[ptr_nod(inode->u.generic_ip)].node; |
| 549 | if (ptr_nod(inode->u.generic_ip) == aliases) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 550 | if ((op->flag & OPP_DIRTY) && (op->flag & OPP_STRING)) { |
| 551 | char *p = op->name; |
| 552 | int i = (op->value - op->name) - strlen (op->name) - 1; |
| 553 | op->value [op->len] = 0; |
| 554 | *(op->value - 1) = ' '; |
| 555 | if (i) { |
| 556 | for (p = op->value - i - 2; p >= op->name; p--) |
| 557 | p[i] = *p; |
| 558 | p = op->name + i; |
| 559 | } |
| 560 | memcpy (p - 8, "nvalias ", 8); |
| 561 | prom_feval (p - 8); |
| 562 | } |
| 563 | } else if (op->flag & OPP_DIRTY) { |
| 564 | if (op->flag & OPP_STRING) { |
| 565 | op->value [op->len] = 0; |
| 566 | error = prom_setprop (node, op->name, |
| 567 | op->value, op->len + 1); |
| 568 | if (error <= 0) |
| 569 | printk (KERN_WARNING "openpromfs: " |
| 570 | "Couldn't write property %s\n", |
| 571 | op->name); |
| 572 | } else if ((op->flag & OPP_BINARY) || !op->len) { |
| 573 | error = prom_setprop (node, op->name, |
| 574 | op->value, op->len); |
| 575 | if (error <= 0) |
| 576 | printk (KERN_WARNING "openpromfs: " |
| 577 | "Couldn't write property %s\n", |
| 578 | op->name); |
| 579 | } else { |
| 580 | printk (KERN_WARNING "openpromfs: " |
| 581 | "Unknown property type of %s\n", |
| 582 | op->name); |
| 583 | } |
| 584 | } |
| 585 | unlock_kernel(); |
| 586 | kfree (filp->private_data); |
| 587 | return 0; |
| 588 | } |
| 589 | |
Arjan van de Ven | 4b6f5d2 | 2006-03-28 01:56:42 -0800 | [diff] [blame] | 590 | static const struct file_operations openpromfs_prop_ops = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 591 | .read = property_read, |
| 592 | .write = property_write, |
| 593 | .release = property_release, |
| 594 | }; |
| 595 | |
Arjan van de Ven | 4b6f5d2 | 2006-03-28 01:56:42 -0800 | [diff] [blame] | 596 | static const struct file_operations openpromfs_nodenum_ops = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 597 | .read = nodenum_read, |
| 598 | }; |
| 599 | |
Arjan van de Ven | 4b6f5d2 | 2006-03-28 01:56:42 -0800 | [diff] [blame] | 600 | static const struct file_operations openprom_operations = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 601 | .read = generic_read_dir, |
| 602 | .readdir = openpromfs_readdir, |
| 603 | }; |
| 604 | |
| 605 | static struct inode_operations openprom_alias_inode_operations = { |
| 606 | .create = openpromfs_create, |
| 607 | .lookup = openpromfs_lookup, |
| 608 | .unlink = openpromfs_unlink, |
| 609 | }; |
| 610 | |
| 611 | static struct inode_operations openprom_inode_operations = { |
| 612 | .lookup = openpromfs_lookup, |
| 613 | }; |
| 614 | |
| 615 | static int lookup_children(u16 n, const char * name, int len) |
| 616 | { |
| 617 | int ret; |
| 618 | u16 node; |
| 619 | for (; n != 0xffff; n = nodes[n].next) { |
| 620 | node = nodes[n].child; |
| 621 | if (node != 0xffff) { |
| 622 | char buffer[128]; |
| 623 | int i; |
| 624 | char *p; |
| 625 | |
| 626 | while (node != 0xffff) { |
| 627 | if (prom_getname (nodes[node].node, |
| 628 | buffer, 128) >= 0) { |
| 629 | i = strlen (buffer); |
| 630 | if ((len == i) |
| 631 | && !strncmp (buffer, name, len)) |
| 632 | return NODE2INO(node); |
| 633 | p = strchr (buffer, '@'); |
| 634 | if (p && (len == p - buffer) |
| 635 | && !strncmp (buffer, name, len)) |
| 636 | return NODE2INO(node); |
| 637 | } |
| 638 | node = nodes[node].next; |
| 639 | } |
| 640 | } else |
| 641 | continue; |
| 642 | ret = lookup_children (nodes[n].child, name, len); |
| 643 | if (ret) return ret; |
| 644 | } |
| 645 | return 0; |
| 646 | } |
| 647 | |
| 648 | static struct dentry *openpromfs_lookup(struct inode * dir, struct dentry *dentry, struct nameidata *nd) |
| 649 | { |
| 650 | int ino = 0; |
| 651 | #define OPFSL_DIR 0 |
| 652 | #define OPFSL_PROPERTY 1 |
| 653 | #define OPFSL_NODENUM 2 |
| 654 | int type = 0; |
| 655 | char buffer[128]; |
| 656 | char *p; |
| 657 | const char *name; |
| 658 | u32 n; |
| 659 | u16 dirnode; |
| 660 | unsigned int len; |
| 661 | int i; |
| 662 | struct inode *inode; |
| 663 | char buffer2[64]; |
| 664 | |
| 665 | inode = NULL; |
| 666 | name = dentry->d_name.name; |
| 667 | len = dentry->d_name.len; |
| 668 | lock_kernel(); |
| 669 | if (name [0] == '.' && len == 5 && !strncmp (name + 1, "node", 4)) { |
| 670 | ino = NODEP2INO(NODE(dir->i_ino).first_prop); |
| 671 | type = OPFSL_NODENUM; |
| 672 | } |
| 673 | if (!ino) { |
| 674 | u16 node = NODE(dir->i_ino).child; |
| 675 | while (node != 0xffff) { |
| 676 | if (prom_getname (nodes[node].node, buffer, 128) >= 0) { |
| 677 | i = strlen (buffer); |
| 678 | if (len == i && !strncmp (buffer, name, len)) { |
| 679 | ino = NODE2INO(node); |
| 680 | type = OPFSL_DIR; |
| 681 | break; |
| 682 | } |
| 683 | p = strchr (buffer, '@'); |
| 684 | if (p && (len == p - buffer) |
| 685 | && !strncmp (buffer, name, len)) { |
| 686 | ino = NODE2INO(node); |
| 687 | type = OPFSL_DIR; |
| 688 | break; |
| 689 | } |
| 690 | } |
| 691 | node = nodes[node].next; |
| 692 | } |
| 693 | } |
| 694 | n = NODE(dir->i_ino).node; |
| 695 | dirnode = dir->i_ino - OPENPROM_FIRST_INO; |
| 696 | if (!ino) { |
| 697 | int j = NODEP2INO(NODE(dir->i_ino).first_prop); |
| 698 | if (dirnode != aliases) { |
| 699 | for (p = prom_firstprop (n, buffer2); |
| 700 | p && *p; |
| 701 | p = prom_nextprop (n, p, buffer2)) { |
| 702 | j++; |
| 703 | if ((len == strlen (p)) |
| 704 | && !strncmp (p, name, len)) { |
| 705 | ino = j; |
| 706 | type = OPFSL_PROPERTY; |
| 707 | break; |
| 708 | } |
| 709 | } |
| 710 | } else { |
| 711 | int k; |
| 712 | for (k = 0; k < aliases_nodes; k++) { |
| 713 | j++; |
| 714 | if (alias_names [k] |
| 715 | && (len == strlen (alias_names [k])) |
| 716 | && !strncmp (alias_names [k], name, len)) { |
| 717 | ino = j; |
| 718 | type = OPFSL_PROPERTY; |
| 719 | break; |
| 720 | } |
| 721 | } |
| 722 | } |
| 723 | } |
| 724 | if (!ino) { |
| 725 | ino = lookup_children (NODE(dir->i_ino).child, name, len); |
| 726 | if (ino) |
| 727 | type = OPFSL_DIR; |
| 728 | else { |
| 729 | unlock_kernel(); |
| 730 | return ERR_PTR(-ENOENT); |
| 731 | } |
| 732 | } |
| 733 | inode = iget (dir->i_sb, ino); |
| 734 | unlock_kernel(); |
| 735 | if (!inode) |
| 736 | return ERR_PTR(-EINVAL); |
| 737 | switch (type) { |
| 738 | case OPFSL_DIR: |
| 739 | inode->i_mode = S_IFDIR | S_IRUGO | S_IXUGO; |
| 740 | if (ino == OPENPROM_FIRST_INO + aliases) { |
| 741 | inode->i_mode |= S_IWUSR; |
| 742 | inode->i_op = &openprom_alias_inode_operations; |
| 743 | } else |
| 744 | inode->i_op = &openprom_inode_operations; |
| 745 | inode->i_fop = &openprom_operations; |
| 746 | inode->i_nlink = 2; |
| 747 | break; |
| 748 | case OPFSL_NODENUM: |
| 749 | inode->i_mode = S_IFREG | S_IRUGO; |
| 750 | inode->i_fop = &openpromfs_nodenum_ops; |
| 751 | inode->i_nlink = 1; |
| 752 | inode->u.generic_ip = (void *)(long)(n); |
| 753 | break; |
| 754 | case OPFSL_PROPERTY: |
| 755 | if ((dirnode == options) && (len == 17) |
| 756 | && !strncmp (name, "security-password", 17)) |
| 757 | inode->i_mode = S_IFREG | S_IRUSR | S_IWUSR; |
| 758 | else { |
| 759 | inode->i_mode = S_IFREG | S_IRUGO; |
| 760 | if (dirnode == options || dirnode == aliases) { |
| 761 | if (len != 4 || strncmp (name, "name", 4)) |
| 762 | inode->i_mode |= S_IWUSR; |
| 763 | } |
| 764 | } |
| 765 | inode->i_fop = &openpromfs_prop_ops; |
| 766 | inode->i_nlink = 1; |
| 767 | if (inode->i_size < 0) |
| 768 | inode->i_size = 0; |
| 769 | inode->u.generic_ip = (void *)(long)(((u16)dirnode) | |
| 770 | (((u16)(ino - NODEP2INO(NODE(dir->i_ino).first_prop) - 1)) << 16)); |
| 771 | break; |
| 772 | } |
| 773 | |
| 774 | inode->i_gid = 0; |
| 775 | inode->i_uid = 0; |
| 776 | |
| 777 | d_add(dentry, inode); |
| 778 | return NULL; |
| 779 | } |
| 780 | |
| 781 | static int openpromfs_readdir(struct file * filp, void * dirent, filldir_t filldir) |
| 782 | { |
| 783 | struct inode *inode = filp->f_dentry->d_inode; |
| 784 | unsigned int ino; |
| 785 | u32 n; |
| 786 | int i, j; |
| 787 | char buffer[128]; |
| 788 | u16 node; |
| 789 | char *p; |
| 790 | char buffer2[64]; |
| 791 | |
| 792 | lock_kernel(); |
| 793 | |
| 794 | ino = inode->i_ino; |
| 795 | i = filp->f_pos; |
| 796 | switch (i) { |
| 797 | case 0: |
| 798 | if (filldir(dirent, ".", 1, i, ino, DT_DIR) < 0) goto out; |
| 799 | i++; |
| 800 | filp->f_pos++; |
| 801 | /* fall thru */ |
| 802 | case 1: |
| 803 | if (filldir(dirent, "..", 2, i, |
| 804 | (NODE(ino).parent == 0xffff) ? |
| 805 | OPENPROM_ROOT_INO : NODE2INO(NODE(ino).parent), DT_DIR) < 0) |
| 806 | goto out; |
| 807 | i++; |
| 808 | filp->f_pos++; |
| 809 | /* fall thru */ |
| 810 | default: |
| 811 | i -= 2; |
| 812 | node = NODE(ino).child; |
| 813 | while (i && node != 0xffff) { |
| 814 | node = nodes[node].next; |
| 815 | i--; |
| 816 | } |
| 817 | while (node != 0xffff) { |
| 818 | if (prom_getname (nodes[node].node, buffer, 128) < 0) |
| 819 | goto out; |
| 820 | if (filldir(dirent, buffer, strlen(buffer), |
| 821 | filp->f_pos, NODE2INO(node), DT_DIR) < 0) |
| 822 | goto out; |
| 823 | filp->f_pos++; |
| 824 | node = nodes[node].next; |
| 825 | } |
| 826 | j = NODEP2INO(NODE(ino).first_prop); |
| 827 | if (!i) { |
| 828 | if (filldir(dirent, ".node", 5, filp->f_pos, j, DT_REG) < 0) |
| 829 | goto out; |
| 830 | filp->f_pos++; |
| 831 | } else |
| 832 | i--; |
| 833 | n = NODE(ino).node; |
| 834 | if (ino == OPENPROM_FIRST_INO + aliases) { |
| 835 | for (j++; i < aliases_nodes; i++, j++) { |
| 836 | if (alias_names [i]) { |
| 837 | if (filldir (dirent, alias_names [i], |
| 838 | strlen (alias_names [i]), |
| 839 | filp->f_pos, j, DT_REG) < 0) goto out; |
| 840 | filp->f_pos++; |
| 841 | } |
| 842 | } |
| 843 | } else { |
| 844 | for (p = prom_firstprop (n, buffer2); |
| 845 | p && *p; |
| 846 | p = prom_nextprop (n, p, buffer2)) { |
| 847 | j++; |
| 848 | if (i) i--; |
| 849 | else { |
| 850 | if (filldir(dirent, p, strlen(p), |
| 851 | filp->f_pos, j, DT_REG) < 0) |
| 852 | goto out; |
| 853 | filp->f_pos++; |
| 854 | } |
| 855 | } |
| 856 | } |
| 857 | } |
| 858 | out: |
| 859 | unlock_kernel(); |
| 860 | return 0; |
| 861 | } |
| 862 | |
| 863 | static int openpromfs_create (struct inode *dir, struct dentry *dentry, int mode, |
| 864 | struct nameidata *nd) |
| 865 | { |
| 866 | char *p; |
| 867 | struct inode *inode; |
| 868 | |
| 869 | if (!dir) |
| 870 | return -ENOENT; |
| 871 | if (dentry->d_name.len > 256) |
| 872 | return -EINVAL; |
| 873 | p = kmalloc (dentry->d_name.len + 1, GFP_KERNEL); |
| 874 | if (!p) |
| 875 | return -ENOMEM; |
| 876 | strncpy (p, dentry->d_name.name, dentry->d_name.len); |
| 877 | p [dentry->d_name.len] = 0; |
| 878 | lock_kernel(); |
| 879 | if (aliases_nodes == ALIASES_NNODES) { |
| 880 | kfree(p); |
| 881 | unlock_kernel(); |
| 882 | return -EIO; |
| 883 | } |
| 884 | alias_names [aliases_nodes++] = p; |
| 885 | inode = iget (dir->i_sb, |
| 886 | NODEP2INO(NODE(dir->i_ino).first_prop) + aliases_nodes); |
| 887 | if (!inode) { |
| 888 | unlock_kernel(); |
| 889 | return -EINVAL; |
| 890 | } |
| 891 | inode->i_mode = S_IFREG | S_IRUGO | S_IWUSR; |
| 892 | inode->i_fop = &openpromfs_prop_ops; |
| 893 | inode->i_nlink = 1; |
| 894 | if (inode->i_size < 0) inode->i_size = 0; |
| 895 | inode->u.generic_ip = (void *)(long)(((u16)aliases) | |
| 896 | (((u16)(aliases_nodes - 1)) << 16)); |
| 897 | unlock_kernel(); |
| 898 | d_instantiate(dentry, inode); |
| 899 | return 0; |
| 900 | } |
| 901 | |
| 902 | static int openpromfs_unlink (struct inode *dir, struct dentry *dentry) |
| 903 | { |
| 904 | unsigned int len; |
| 905 | char *p; |
| 906 | const char *name; |
| 907 | int i; |
| 908 | |
| 909 | name = dentry->d_name.name; |
| 910 | len = dentry->d_name.len; |
| 911 | lock_kernel(); |
| 912 | for (i = 0; i < aliases_nodes; i++) |
| 913 | if ((strlen (alias_names [i]) == len) |
| 914 | && !strncmp (name, alias_names[i], len)) { |
| 915 | char buffer[512]; |
| 916 | |
| 917 | p = alias_names [i]; |
| 918 | alias_names [i] = NULL; |
| 919 | kfree (p); |
| 920 | strcpy (buffer, "nvunalias "); |
| 921 | memcpy (buffer + 10, name, len); |
| 922 | buffer [10 + len] = 0; |
| 923 | prom_feval (buffer); |
| 924 | } |
| 925 | unlock_kernel(); |
| 926 | return 0; |
| 927 | } |
| 928 | |
| 929 | /* {{{ init section */ |
| 930 | static int __init check_space (u16 n) |
| 931 | { |
| 932 | unsigned long pages; |
| 933 | |
| 934 | if ((1 << alloced) * PAGE_SIZE < (n + 2) * sizeof(openpromfs_node)) { |
| 935 | pages = __get_free_pages (GFP_KERNEL, alloced + 1); |
| 936 | if (!pages) |
| 937 | return -1; |
| 938 | |
| 939 | if (nodes) { |
Jan Engelhardt | 515decd | 2006-06-25 05:47:35 -0700 | [diff] [blame] | 940 | memcpy ((char *)pages, nodes, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 941 | (1 << alloced) * PAGE_SIZE); |
| 942 | free_pages ((unsigned long)nodes, alloced); |
| 943 | } |
| 944 | alloced++; |
| 945 | nodes = (openpromfs_node *)pages; |
| 946 | } |
| 947 | return 0; |
| 948 | } |
| 949 | |
| 950 | static u16 __init get_nodes (u16 parent, u32 node) |
| 951 | { |
| 952 | char *p; |
| 953 | u16 n = last_node++, i; |
| 954 | char buffer[64]; |
| 955 | |
| 956 | if (check_space (n) < 0) |
| 957 | return 0xffff; |
| 958 | nodes[n].parent = parent; |
| 959 | nodes[n].node = node; |
| 960 | nodes[n].next = 0xffff; |
| 961 | nodes[n].child = 0xffff; |
| 962 | nodes[n].first_prop = first_prop++; |
| 963 | if (!parent) { |
| 964 | char buffer[8]; |
| 965 | int j; |
| 966 | |
| 967 | if ((j = prom_getproperty (node, "name", buffer, 8)) >= 0) { |
| 968 | buffer[j] = 0; |
| 969 | if (!strcmp (buffer, "options")) |
| 970 | options = n; |
| 971 | else if (!strcmp (buffer, "aliases")) |
| 972 | aliases = n; |
| 973 | } |
| 974 | } |
| 975 | if (n != aliases) |
| 976 | for (p = prom_firstprop (node, buffer); |
| 977 | p && p != (char *)-1 && *p; |
| 978 | p = prom_nextprop (node, p, buffer)) |
| 979 | first_prop++; |
| 980 | else { |
| 981 | char *q; |
| 982 | for (p = prom_firstprop (node, buffer); |
| 983 | p && p != (char *)-1 && *p; |
| 984 | p = prom_nextprop (node, p, buffer)) { |
| 985 | if (aliases_nodes == ALIASES_NNODES) |
| 986 | break; |
| 987 | for (i = 0; i < aliases_nodes; i++) |
| 988 | if (!strcmp (p, alias_names [i])) |
| 989 | break; |
| 990 | if (i < aliases_nodes) |
| 991 | continue; |
| 992 | q = kmalloc (strlen (p) + 1, GFP_KERNEL); |
| 993 | if (!q) |
| 994 | return 0xffff; |
| 995 | strcpy (q, p); |
| 996 | alias_names [aliases_nodes++] = q; |
| 997 | } |
| 998 | first_prop += ALIASES_NNODES; |
| 999 | } |
| 1000 | node = prom_getchild (node); |
| 1001 | if (node) { |
| 1002 | parent = get_nodes (n, node); |
| 1003 | if (parent == 0xffff) |
| 1004 | return 0xffff; |
| 1005 | nodes[n].child = parent; |
| 1006 | while ((node = prom_getsibling (node)) != 0) { |
| 1007 | i = get_nodes (n, node); |
| 1008 | if (i == 0xffff) |
| 1009 | return 0xffff; |
| 1010 | nodes[parent].next = i; |
| 1011 | parent = i; |
| 1012 | } |
| 1013 | } |
| 1014 | return n; |
| 1015 | } |
| 1016 | |
| 1017 | static void openprom_read_inode(struct inode * inode) |
| 1018 | { |
| 1019 | inode->i_mtime = inode->i_atime = inode->i_ctime = CURRENT_TIME; |
| 1020 | if (inode->i_ino == OPENPROM_ROOT_INO) { |
| 1021 | inode->i_op = &openprom_inode_operations; |
| 1022 | inode->i_fop = &openprom_operations; |
| 1023 | inode->i_mode = S_IFDIR | S_IRUGO | S_IXUGO; |
| 1024 | } |
| 1025 | } |
| 1026 | |
| 1027 | static int openprom_remount(struct super_block *sb, int *flags, char *data) |
| 1028 | { |
| 1029 | *flags |= MS_NOATIME; |
| 1030 | return 0; |
| 1031 | } |
| 1032 | |
| 1033 | static struct super_operations openprom_sops = { |
| 1034 | .read_inode = openprom_read_inode, |
| 1035 | .statfs = simple_statfs, |
| 1036 | .remount_fs = openprom_remount, |
| 1037 | }; |
| 1038 | |
| 1039 | static int openprom_fill_super(struct super_block *s, void *data, int silent) |
| 1040 | { |
| 1041 | struct inode * root_inode; |
| 1042 | |
| 1043 | s->s_flags |= MS_NOATIME; |
| 1044 | s->s_blocksize = 1024; |
| 1045 | s->s_blocksize_bits = 10; |
| 1046 | s->s_magic = OPENPROM_SUPER_MAGIC; |
| 1047 | s->s_op = &openprom_sops; |
| 1048 | s->s_time_gran = 1; |
| 1049 | root_inode = iget(s, OPENPROM_ROOT_INO); |
| 1050 | if (!root_inode) |
| 1051 | goto out_no_root; |
| 1052 | s->s_root = d_alloc_root(root_inode); |
| 1053 | if (!s->s_root) |
| 1054 | goto out_no_root; |
| 1055 | return 0; |
| 1056 | |
| 1057 | out_no_root: |
| 1058 | printk("openprom_fill_super: get root inode failed\n"); |
| 1059 | iput(root_inode); |
| 1060 | return -ENOMEM; |
| 1061 | } |
| 1062 | |
David Howells | 454e239 | 2006-06-23 02:02:57 -0700 | [diff] [blame] | 1063 | static int openprom_get_sb(struct file_system_type *fs_type, |
| 1064 | int flags, const char *dev_name, void *data, struct vfsmount *mnt) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1065 | { |
David Howells | 454e239 | 2006-06-23 02:02:57 -0700 | [diff] [blame] | 1066 | return get_sb_single(fs_type, flags, data, openprom_fill_super, mnt); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1067 | } |
| 1068 | |
| 1069 | static struct file_system_type openprom_fs_type = { |
| 1070 | .owner = THIS_MODULE, |
| 1071 | .name = "openpromfs", |
| 1072 | .get_sb = openprom_get_sb, |
| 1073 | .kill_sb = kill_anon_super, |
| 1074 | }; |
| 1075 | |
| 1076 | static int __init init_openprom_fs(void) |
| 1077 | { |
| 1078 | nodes = (openpromfs_node *)__get_free_pages(GFP_KERNEL, 0); |
| 1079 | if (!nodes) { |
| 1080 | printk (KERN_WARNING "openpromfs: can't get free page\n"); |
| 1081 | return -EIO; |
| 1082 | } |
| 1083 | if (get_nodes (0xffff, prom_root_node) == 0xffff) { |
| 1084 | printk (KERN_WARNING "openpromfs: couldn't setup tree\n"); |
| 1085 | return -EIO; |
| 1086 | } |
| 1087 | nodes[last_node].first_prop = first_prop; |
| 1088 | return register_filesystem(&openprom_fs_type); |
| 1089 | } |
| 1090 | |
| 1091 | static void __exit exit_openprom_fs(void) |
| 1092 | { |
| 1093 | int i; |
| 1094 | unregister_filesystem(&openprom_fs_type); |
| 1095 | free_pages ((unsigned long)nodes, alloced); |
| 1096 | for (i = 0; i < aliases_nodes; i++) |
Jesper Juhl | f99d49a | 2005-11-07 01:01:34 -0800 | [diff] [blame] | 1097 | kfree (alias_names [i]); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1098 | nodes = NULL; |
| 1099 | } |
| 1100 | |
| 1101 | module_init(init_openprom_fs) |
| 1102 | module_exit(exit_openprom_fs) |
| 1103 | MODULE_LICENSE("GPL"); |