1 /*
2 * YAFFS: Yet Another Flash File System. A NAND-flash specific file system.
3 *
4 * Copyright (C) 2002-2009 Aleph One Ltd.
5 * for Toby Churchill Ltd and Brightstar Engineering
6 *
7 * Created by Charles Manning <charles@aleph1.co.uk>
8 * Acknowledgements:
9 * Luc van OostenRyck for numerous patches.
10 * Nick Bane for numerous patches.
11 * Nick Bane for 2.5/2.6 integration.
12 * Andras Toth for mknod rdev issue.
13 * Michael Fischer for finding the problem with inode inconsistency.
14 * Some code bodily lifted from JFFS
15 *
16 * This program is free software; you can redistribute it and/or modify
17 * it under the terms of the GNU General Public License version 2 as
18 * published by the Free Software Foundation.
19 */
20
21 /*
22 *
23 * This is the file system front-end to YAFFS that hooks it up to
24 * the VFS.
25 *
26 * Special notes:
27 * >> 2.4: sb->u.generic_sbp points to the yaffs_Device associated with
28 * this superblock
29 * >> 2.6: sb->s_fs_info points to the yaffs_Device associated with this
30 * superblock
31 * >> inode->u.generic_ip points to the associated yaffs_Object.
32 */
33
34 const char *yaffs_fs_c_version =
35 "$Id$";
36 extern const char *yaffs_guts_c_version;
37
38 #include <linux/version.h>
39 #if (LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 19))
40 #include <linux/config.h>
41 #endif
42 #include <linux/kernel.h>
43 #include <linux/module.h>
44 #include <linux/slab.h>
45 #include <linux/init.h>
46 #include <linux/fs.h>
47 #include <linux/proc_fs.h>
48 #include <linux/smp_lock.h>
49 #include <linux/pagemap.h>
50 #include <linux/mtd/mtd.h>
51 #include <linux/interrupt.h>
52 #include <linux/string.h>
53 #include <linux/ctype.h>
54
55 #include "asm/div64.h"
56
57 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0))
58
59 #include <linux/statfs.h> /* Added NCB 15-8-2003 */
60 #include <linux/statfs.h>
61 #define UnlockPage(p) unlock_page(p)
62 #define Page_Uptodate(page) test_bit(PG_uptodate, &(page)->flags)
63
64 /* FIXME: use sb->s_id instead ? */
65 #define yaffs_devname(sb, buf) bdevname(sb->s_bdev, buf)
66
67 #else
68
69 #include <linux/locks.h>
70 #define BDEVNAME_SIZE 0
71 #define yaffs_devname(sb, buf) kdevname(sb->s_dev)
72
73 #if (LINUX_VERSION_CODE < KERNEL_VERSION(2, 5, 0))
74 /* added NCB 26/5/2006 for 2.4.25-vrs2-tcl1 kernel */
75 #define __user
76 #endif
77
78 #endif
79
80 #if (LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 26))
81 #define YPROC_ROOT (&proc_root)
82 #else
83 #define YPROC_ROOT NULL
84 #endif
85
86 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 17))
87 #define WRITE_SIZE_STR "writesize"
88 #define WRITE_SIZE(mtd) ((mtd)->writesize)
89 #else
90 #define WRITE_SIZE_STR "oobblock"
91 #define WRITE_SIZE(mtd) ((mtd)->oobblock)
92 #endif
93
94 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 27))
95 #define YAFFS_USE_WRITE_BEGIN_END 1
96 #else
97 #define YAFFS_USE_WRITE_BEGIN_END 0
98 #endif
99
100 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 28))
YCALCBLOCKS(uint64_t partition_size,uint32_t block_size)101 static uint32_t YCALCBLOCKS(uint64_t partition_size, uint32_t block_size)
102 {
103 uint64_t result = partition_size;
104 do_div(result, block_size);
105 return (uint32_t)result;
106 }
107 #else
108 #define YCALCBLOCKS(s, b) ((s)/(b))
109 #endif
110
111 #include <linux/uaccess.h>
112
113 #include "yportenv.h"
114 #include "yaffs_guts.h"
115
116 #include <linux/mtd/mtd.h>
117 #include "yaffs_mtdif.h"
118 #include "yaffs_mtdif1.h"
119 #include "yaffs_mtdif2.h"
120
121 unsigned int yaffs_traceMask = YAFFS_TRACE_BAD_BLOCKS;
122 unsigned int yaffs_wr_attempts = YAFFS_WR_ATTEMPTS;
123 unsigned int yaffs_auto_checkpoint = 1;
124
125 /* Module Parameters */
126 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0))
127 module_param(yaffs_traceMask, uint, 0644);
128 module_param(yaffs_wr_attempts, uint, 0644);
129 module_param(yaffs_auto_checkpoint, uint, 0644);
130 #else
131 MODULE_PARM(yaffs_traceMask, "i");
132 MODULE_PARM(yaffs_wr_attempts, "i");
133 MODULE_PARM(yaffs_auto_checkpoint, "i");
134 #endif
135
136 #if (LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 25))
137 /* use iget and read_inode */
138 #define Y_IGET(sb, inum) iget((sb), (inum))
139 static void yaffs_read_inode(struct inode *inode);
140
141 #else
142 /* Call local equivalent */
143 #define YAFFS_USE_OWN_IGET
144 #define Y_IGET(sb, inum) yaffs_iget((sb), (inum))
145
146 static struct inode *yaffs_iget(struct super_block *sb, unsigned long ino);
147 #endif
148
149 /*#define T(x) printk x */
150
151 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 18))
152 #define yaffs_InodeToObjectLV(iptr) ((iptr)->i_private)
153 #else
154 #define yaffs_InodeToObjectLV(iptr) ((iptr)->u.generic_ip)
155 #endif
156
157 #define yaffs_InodeToObject(iptr) ((yaffs_Object *)(yaffs_InodeToObjectLV(iptr)))
158 #define yaffs_DentryToObject(dptr) yaffs_InodeToObject((dptr)->d_inode)
159
160 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0))
161 #define yaffs_SuperToDevice(sb) ((yaffs_Device *)sb->s_fs_info)
162 #else
163 #define yaffs_SuperToDevice(sb) ((yaffs_Device *)sb->u.generic_sbp)
164 #endif
165
166
167 #define update_dir_time(dir) do {\
168 (dir)->i_ctime = (dir)->i_mtime = CURRENT_TIME; \
169 } while(0)
170
171 static void yaffs_put_super(struct super_block *sb);
172
173 static ssize_t yaffs_file_write(struct file *f, const char *buf, size_t n,
174 loff_t *pos);
175 static ssize_t yaffs_hold_space(struct file *f);
176 static void yaffs_release_space(struct file *f);
177
178 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 17))
179 static int yaffs_file_flush(struct file *file, fl_owner_t id);
180 #else
181 static int yaffs_file_flush(struct file *file);
182 #endif
183
184 static int yaffs_sync_object(struct file *file, struct dentry *dentry,
185 int datasync);
186
187 static int yaffs_readdir(struct file *f, void *dirent, filldir_t filldir);
188
189 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0))
190 static int yaffs_create(struct inode *dir, struct dentry *dentry, int mode,
191 struct nameidata *n);
192 static struct dentry *yaffs_lookup(struct inode *dir, struct dentry *dentry,
193 struct nameidata *n);
194 #else
195 static int yaffs_create(struct inode *dir, struct dentry *dentry, int mode);
196 static struct dentry *yaffs_lookup(struct inode *dir, struct dentry *dentry);
197 #endif
198 static int yaffs_link(struct dentry *old_dentry, struct inode *dir,
199 struct dentry *dentry);
200 static int yaffs_unlink(struct inode *dir, struct dentry *dentry);
201 static int yaffs_symlink(struct inode *dir, struct dentry *dentry,
202 const char *symname);
203 static int yaffs_mkdir(struct inode *dir, struct dentry *dentry, int mode);
204
205 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0))
206 static int yaffs_mknod(struct inode *dir, struct dentry *dentry, int mode,
207 dev_t dev);
208 #else
209 static int yaffs_mknod(struct inode *dir, struct dentry *dentry, int mode,
210 int dev);
211 #endif
212 static int yaffs_rename(struct inode *old_dir, struct dentry *old_dentry,
213 struct inode *new_dir, struct dentry *new_dentry);
214 static int yaffs_setattr(struct dentry *dentry, struct iattr *attr);
215
216 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 17))
217 static int yaffs_sync_fs(struct super_block *sb, int wait);
218 static void yaffs_write_super(struct super_block *sb);
219 #else
220 static int yaffs_sync_fs(struct super_block *sb);
221 static int yaffs_write_super(struct super_block *sb);
222 #endif
223
224 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 17))
225 static int yaffs_statfs(struct dentry *dentry, struct kstatfs *buf);
226 #elif (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0))
227 static int yaffs_statfs(struct super_block *sb, struct kstatfs *buf);
228 #else
229 static int yaffs_statfs(struct super_block *sb, struct statfs *buf);
230 #endif
231
232 #ifdef YAFFS_HAS_PUT_INODE
233 static void yaffs_put_inode(struct inode *inode);
234 #endif
235
236 static void yaffs_delete_inode(struct inode *);
237 static void yaffs_clear_inode(struct inode *);
238
239 static int yaffs_readpage(struct file *file, struct page *page);
240 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0))
241 static int yaffs_writepage(struct page *page, struct writeback_control *wbc);
242 #else
243 static int yaffs_writepage(struct page *page);
244 #endif
245
246
247 #if (YAFFS_USE_WRITE_BEGIN_END != 0)
248 static int yaffs_write_begin(struct file *filp, struct address_space *mapping,
249 loff_t pos, unsigned len, unsigned flags,
250 struct page **pagep, void **fsdata);
251 static int yaffs_write_end(struct file *filp, struct address_space *mapping,
252 loff_t pos, unsigned len, unsigned copied,
253 struct page *pg, void *fsdadata);
254 #else
255 static int yaffs_prepare_write(struct file *f, struct page *pg,
256 unsigned offset, unsigned to);
257 static int yaffs_commit_write(struct file *f, struct page *pg, unsigned offset,
258 unsigned to);
259
260 #endif
261
262 static int yaffs_readlink(struct dentry *dentry, char __user *buffer,
263 int buflen);
264 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 13))
265 static void *yaffs_follow_link(struct dentry *dentry, struct nameidata *nd);
266 #else
267 static int yaffs_follow_link(struct dentry *dentry, struct nameidata *nd);
268 #endif
269
270 static struct address_space_operations yaffs_file_address_operations = {
271 .readpage = yaffs_readpage,
272 .writepage = yaffs_writepage,
273 #if (YAFFS_USE_WRITE_BEGIN_END > 0)
274 .write_begin = yaffs_write_begin,
275 .write_end = yaffs_write_end,
276 #else
277 .prepare_write = yaffs_prepare_write,
278 .commit_write = yaffs_commit_write,
279 #endif
280 };
281
282 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 22))
283 static const struct file_operations yaffs_file_operations = {
284 .read = do_sync_read,
285 .write = do_sync_write,
286 .aio_read = generic_file_aio_read,
287 .aio_write = generic_file_aio_write,
288 .mmap = generic_file_mmap,
289 .flush = yaffs_file_flush,
290 .fsync = yaffs_sync_object,
291 .splice_read = generic_file_splice_read,
292 .splice_write = generic_file_splice_write,
293 .llseek = generic_file_llseek,
294 };
295
296 #elif (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 18))
297
298 static const struct file_operations yaffs_file_operations = {
299 .read = do_sync_read,
300 .write = do_sync_write,
301 .aio_read = generic_file_aio_read,
302 .aio_write = generic_file_aio_write,
303 .mmap = generic_file_mmap,
304 .flush = yaffs_file_flush,
305 .fsync = yaffs_sync_object,
306 .sendfile = generic_file_sendfile,
307 };
308
309 #else
310
311 static const struct file_operations yaffs_file_operations = {
312 .read = generic_file_read,
313 .write = generic_file_write,
314 .mmap = generic_file_mmap,
315 .flush = yaffs_file_flush,
316 .fsync = yaffs_sync_object,
317 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0))
318 .sendfile = generic_file_sendfile,
319 #endif
320 };
321 #endif
322
323 static const struct inode_operations yaffs_file_inode_operations = {
324 .setattr = yaffs_setattr,
325 };
326
327 static const struct inode_operations yaffs_symlink_inode_operations = {
328 .readlink = yaffs_readlink,
329 .follow_link = yaffs_follow_link,
330 .setattr = yaffs_setattr,
331 };
332
333 static const struct inode_operations yaffs_dir_inode_operations = {
334 .create = yaffs_create,
335 .lookup = yaffs_lookup,
336 .link = yaffs_link,
337 .unlink = yaffs_unlink,
338 .symlink = yaffs_symlink,
339 .mkdir = yaffs_mkdir,
340 .rmdir = yaffs_unlink,
341 .mknod = yaffs_mknod,
342 .rename = yaffs_rename,
343 .setattr = yaffs_setattr,
344 };
345
346 static const struct file_operations yaffs_dir_operations = {
347 .read = generic_read_dir,
348 .readdir = yaffs_readdir,
349 .fsync = yaffs_sync_object,
350 };
351
352 static const struct super_operations yaffs_super_ops = {
353 .statfs = yaffs_statfs,
354
355 #ifndef YAFFS_USE_OWN_IGET
356 .read_inode = yaffs_read_inode,
357 #endif
358 #ifdef YAFFS_HAS_PUT_INODE
359 .put_inode = yaffs_put_inode,
360 #endif
361 .put_super = yaffs_put_super,
362 .delete_inode = yaffs_delete_inode,
363 .clear_inode = yaffs_clear_inode,
364 .sync_fs = yaffs_sync_fs,
365 .write_super = yaffs_write_super,
366 };
367
yaffs_GrossLock(yaffs_Device * dev)368 static void yaffs_GrossLock(yaffs_Device *dev)
369 {
370 T(YAFFS_TRACE_OS, ("yaffs locking %p\n", current));
371 down(&dev->grossLock);
372 T(YAFFS_TRACE_OS, ("yaffs locked %p\n", current));
373 }
374
yaffs_GrossUnlock(yaffs_Device * dev)375 static void yaffs_GrossUnlock(yaffs_Device *dev)
376 {
377 T(YAFFS_TRACE_OS, ("yaffs unlocking %p\n", current));
378 up(&dev->grossLock);
379 }
380
yaffs_readlink(struct dentry * dentry,char __user * buffer,int buflen)381 static int yaffs_readlink(struct dentry *dentry, char __user *buffer,
382 int buflen)
383 {
384 unsigned char *alias;
385 int ret;
386
387 yaffs_Device *dev = yaffs_DentryToObject(dentry)->myDev;
388
389 yaffs_GrossLock(dev);
390
391 alias = yaffs_GetSymlinkAlias(yaffs_DentryToObject(dentry));
392
393 yaffs_GrossUnlock(dev);
394
395 if (!alias)
396 return -ENOMEM;
397
398 ret = vfs_readlink(dentry, buffer, buflen, alias);
399 kfree(alias);
400 return ret;
401 }
402
403 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 13))
yaffs_follow_link(struct dentry * dentry,struct nameidata * nd)404 static void *yaffs_follow_link(struct dentry *dentry, struct nameidata *nd)
405 #else
406 static int yaffs_follow_link(struct dentry *dentry, struct nameidata *nd)
407 #endif
408 {
409 unsigned char *alias;
410 int ret;
411 yaffs_Device *dev = yaffs_DentryToObject(dentry)->myDev;
412
413 yaffs_GrossLock(dev);
414
415 alias = yaffs_GetSymlinkAlias(yaffs_DentryToObject(dentry));
416
417 yaffs_GrossUnlock(dev);
418
419 if (!alias) {
420 ret = -ENOMEM;
421 goto out;
422 }
423
424 ret = vfs_follow_link(nd, alias);
425 kfree(alias);
426 out:
427 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 13))
428 return ERR_PTR(ret);
429 #else
430 return ret;
431 #endif
432 }
433
434 struct inode *yaffs_get_inode(struct super_block *sb, int mode, int dev,
435 yaffs_Object *obj);
436
437 /*
438 * Lookup is used to find objects in the fs
439 */
440 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0))
441
yaffs_lookup(struct inode * dir,struct dentry * dentry,struct nameidata * n)442 static struct dentry *yaffs_lookup(struct inode *dir, struct dentry *dentry,
443 struct nameidata *n)
444 #else
445 static struct dentry *yaffs_lookup(struct inode *dir, struct dentry *dentry)
446 #endif
447 {
448 yaffs_Object *obj;
449 struct inode *inode = NULL; /* NCB 2.5/2.6 needs NULL here */
450
451 yaffs_Device *dev = yaffs_InodeToObject(dir)->myDev;
452
453 yaffs_GrossLock(dev);
454
455 T(YAFFS_TRACE_OS,
456 ("yaffs_lookup for %d:%s\n",
457 yaffs_InodeToObject(dir)->objectId, dentry->d_name.name));
458
459 obj = yaffs_FindObjectByName(yaffs_InodeToObject(dir),
460 dentry->d_name.name);
461
462 obj = yaffs_GetEquivalentObject(obj); /* in case it was a hardlink */
463
464 /* Can't hold gross lock when calling yaffs_get_inode() */
465 yaffs_GrossUnlock(dev);
466
467 if (obj) {
468 T(YAFFS_TRACE_OS,
469 ("yaffs_lookup found %d\n", obj->objectId));
470
471 inode = yaffs_get_inode(dir->i_sb, obj->yst_mode, 0, obj);
472
473 if (inode) {
474 T(YAFFS_TRACE_OS,
475 ("yaffs_loookup dentry \n"));
476 /* #if 0 asserted by NCB for 2.5/6 compatability - falls through to
477 * d_add even if NULL inode */
478 #if 0
479 /*dget(dentry); // try to solve directory bug */
480 d_add(dentry, inode);
481
482 /* return dentry; */
483 return NULL;
484 #endif
485 }
486
487 } else {
488 T(YAFFS_TRACE_OS, ("yaffs_lookup not found\n"));
489
490 }
491
492 /* added NCB for 2.5/6 compatability - forces add even if inode is
493 * NULL which creates dentry hash */
494 d_add(dentry, inode);
495
496 return NULL;
497 }
498
499
500 #ifdef YAFFS_HAS_PUT_INODE
501
502 /* For now put inode is just for debugging
503 * Put inode is called when the inode **structure** is put.
504 */
yaffs_put_inode(struct inode * inode)505 static void yaffs_put_inode(struct inode *inode)
506 {
507 T(YAFFS_TRACE_OS,
508 ("yaffs_put_inode: ino %d, count %d\n", (int)inode->i_ino,
509 atomic_read(&inode->i_count)));
510
511 }
512 #endif
513
514 /* clear is called to tell the fs to release any per-inode data it holds */
yaffs_clear_inode(struct inode * inode)515 static void yaffs_clear_inode(struct inode *inode)
516 {
517 yaffs_Object *obj;
518 yaffs_Device *dev;
519
520 obj = yaffs_InodeToObject(inode);
521
522 T(YAFFS_TRACE_OS,
523 ("yaffs_clear_inode: ino %d, count %d %s\n", (int)inode->i_ino,
524 atomic_read(&inode->i_count),
525 obj ? "object exists" : "null object"));
526
527 if (obj) {
528 dev = obj->myDev;
529 yaffs_GrossLock(dev);
530
531 /* Clear the association between the inode and
532 * the yaffs_Object.
533 */
534 obj->myInode = NULL;
535 yaffs_InodeToObjectLV(inode) = NULL;
536
537 /* If the object freeing was deferred, then the real
538 * free happens now.
539 * This should fix the inode inconsistency problem.
540 */
541
542 yaffs_HandleDeferedFree(obj);
543
544 yaffs_GrossUnlock(dev);
545 }
546
547 }
548
549 /* delete is called when the link count is zero and the inode
550 * is put (ie. nobody wants to know about it anymore, time to
551 * delete the file).
552 * NB Must call clear_inode()
553 */
yaffs_delete_inode(struct inode * inode)554 static void yaffs_delete_inode(struct inode *inode)
555 {
556 yaffs_Object *obj = yaffs_InodeToObject(inode);
557 yaffs_Device *dev;
558
559 T(YAFFS_TRACE_OS,
560 ("yaffs_delete_inode: ino %d, count %d %s\n", (int)inode->i_ino,
561 atomic_read(&inode->i_count),
562 obj ? "object exists" : "null object"));
563
564 if (obj) {
565 dev = obj->myDev;
566 yaffs_GrossLock(dev);
567 yaffs_DeleteObject(obj);
568 yaffs_GrossUnlock(dev);
569 }
570 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 13))
571 truncate_inode_pages(&inode->i_data, 0);
572 #endif
573 clear_inode(inode);
574 }
575
576 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 17))
yaffs_file_flush(struct file * file,fl_owner_t id)577 static int yaffs_file_flush(struct file *file, fl_owner_t id)
578 #else
579 static int yaffs_file_flush(struct file *file)
580 #endif
581 {
582 yaffs_Object *obj = yaffs_DentryToObject(file->f_dentry);
583
584 yaffs_Device *dev = obj->myDev;
585
586 T(YAFFS_TRACE_OS,
587 ("yaffs_file_flush object %d (%s)\n", obj->objectId,
588 obj->dirty ? "dirty" : "clean"));
589
590 yaffs_GrossLock(dev);
591
592 yaffs_FlushFile(obj, 1);
593
594 yaffs_GrossUnlock(dev);
595
596 return 0;
597 }
598
yaffs_readpage_nolock(struct file * f,struct page * pg)599 static int yaffs_readpage_nolock(struct file *f, struct page *pg)
600 {
601 /* Lifted from jffs2 */
602
603 yaffs_Object *obj;
604 unsigned char *pg_buf;
605 int ret;
606
607 yaffs_Device *dev;
608
609 T(YAFFS_TRACE_OS, ("yaffs_readpage at %08x, size %08x\n",
610 (unsigned)(pg->index << PAGE_CACHE_SHIFT),
611 (unsigned)PAGE_CACHE_SIZE));
612
613 obj = yaffs_DentryToObject(f->f_dentry);
614
615 dev = obj->myDev;
616
617 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0))
618 BUG_ON(!PageLocked(pg));
619 #else
620 if (!PageLocked(pg))
621 PAGE_BUG(pg);
622 #endif
623
624 pg_buf = kmap(pg);
625 /* FIXME: Can kmap fail? */
626
627 yaffs_GrossLock(dev);
628
629 ret = yaffs_ReadDataFromFile(obj, pg_buf,
630 pg->index << PAGE_CACHE_SHIFT,
631 PAGE_CACHE_SIZE);
632
633 yaffs_GrossUnlock(dev);
634
635 if (ret >= 0)
636 ret = 0;
637
638 if (ret) {
639 ClearPageUptodate(pg);
640 SetPageError(pg);
641 } else {
642 SetPageUptodate(pg);
643 ClearPageError(pg);
644 }
645
646 flush_dcache_page(pg);
647 kunmap(pg);
648
649 T(YAFFS_TRACE_OS, ("yaffs_readpage done\n"));
650 return ret;
651 }
652
yaffs_readpage_unlock(struct file * f,struct page * pg)653 static int yaffs_readpage_unlock(struct file *f, struct page *pg)
654 {
655 int ret = yaffs_readpage_nolock(f, pg);
656 UnlockPage(pg);
657 return ret;
658 }
659
yaffs_readpage(struct file * f,struct page * pg)660 static int yaffs_readpage(struct file *f, struct page *pg)
661 {
662 return yaffs_readpage_unlock(f, pg);
663 }
664
665 /* writepage inspired by/stolen from smbfs */
666
667 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0))
yaffs_writepage(struct page * page,struct writeback_control * wbc)668 static int yaffs_writepage(struct page *page, struct writeback_control *wbc)
669 #else
670 static int yaffs_writepage(struct page *page)
671 #endif
672 {
673 struct address_space *mapping = page->mapping;
674 loff_t offset = (loff_t) page->index << PAGE_CACHE_SHIFT;
675 struct inode *inode;
676 unsigned long end_index;
677 char *buffer;
678 yaffs_Object *obj;
679 int nWritten = 0;
680 unsigned nBytes;
681
682 if (!mapping)
683 BUG();
684 inode = mapping->host;
685 if (!inode)
686 BUG();
687
688 if (offset > inode->i_size) {
689 T(YAFFS_TRACE_OS,
690 ("yaffs_writepage at %08x, inode size = %08x!!!\n",
691 (unsigned)(page->index << PAGE_CACHE_SHIFT),
692 (unsigned)inode->i_size));
693 T(YAFFS_TRACE_OS,
694 (" -> don't care!!\n"));
695 unlock_page(page);
696 return 0;
697 }
698
699 end_index = inode->i_size >> PAGE_CACHE_SHIFT;
700
701 /* easy case */
702 if (page->index < end_index)
703 nBytes = PAGE_CACHE_SIZE;
704 else
705 nBytes = inode->i_size & (PAGE_CACHE_SIZE - 1);
706
707 get_page(page);
708
709 buffer = kmap(page);
710
711 obj = yaffs_InodeToObject(inode);
712 yaffs_GrossLock(obj->myDev);
713
714 T(YAFFS_TRACE_OS,
715 ("yaffs_writepage at %08x, size %08x\n",
716 (unsigned)(page->index << PAGE_CACHE_SHIFT), nBytes));
717 T(YAFFS_TRACE_OS,
718 ("writepag0: obj = %05x, ino = %05x\n",
719 (int)obj->variant.fileVariant.fileSize, (int)inode->i_size));
720
721 nWritten = yaffs_WriteDataToFile(obj, buffer,
722 page->index << PAGE_CACHE_SHIFT, nBytes, 0);
723
724 T(YAFFS_TRACE_OS,
725 ("writepag1: obj = %05x, ino = %05x\n",
726 (int)obj->variant.fileVariant.fileSize, (int)inode->i_size));
727
728 yaffs_GrossUnlock(obj->myDev);
729
730 kunmap(page);
731 SetPageUptodate(page);
732 UnlockPage(page);
733 put_page(page);
734
735 return (nWritten == nBytes) ? 0 : -ENOSPC;
736 }
737
738
739 #if (YAFFS_USE_WRITE_BEGIN_END > 0)
yaffs_write_begin(struct file * filp,struct address_space * mapping,loff_t pos,unsigned len,unsigned flags,struct page ** pagep,void ** fsdata)740 static int yaffs_write_begin(struct file *filp, struct address_space *mapping,
741 loff_t pos, unsigned len, unsigned flags,
742 struct page **pagep, void **fsdata)
743 {
744 struct page *pg = NULL;
745 pgoff_t index = pos >> PAGE_CACHE_SHIFT;
746 uint32_t offset = pos & (PAGE_CACHE_SIZE - 1);
747 uint32_t to = offset + len;
748
749 int ret = 0;
750 int space_held = 0;
751
752 T(YAFFS_TRACE_OS, ("start yaffs_write_begin\n"));
753 /* Get a page */
754 #if LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 28)
755 pg = grab_cache_page_write_begin(mapping, index, flags);
756 #else
757 pg = __grab_cache_page(mapping, index);
758 #endif
759
760 *pagep = pg;
761 if (!pg) {
762 ret = -ENOMEM;
763 goto out;
764 }
765 /* Get fs space */
766 space_held = yaffs_hold_space(filp);
767
768 if (!space_held) {
769 ret = -ENOSPC;
770 goto out;
771 }
772
773 /* Update page if required */
774
775 if (!Page_Uptodate(pg) && (offset || to < PAGE_CACHE_SIZE))
776 ret = yaffs_readpage_nolock(filp, pg);
777
778 if (ret)
779 goto out;
780
781 /* Happy path return */
782 T(YAFFS_TRACE_OS, ("end yaffs_write_begin - ok\n"));
783
784 return 0;
785
786 out:
787 T(YAFFS_TRACE_OS, ("end yaffs_write_begin fail returning %d\n", ret));
788 if (space_held)
789 yaffs_release_space(filp);
790 if (pg) {
791 unlock_page(pg);
792 page_cache_release(pg);
793 }
794 return ret;
795 }
796
797 #else
798
yaffs_prepare_write(struct file * f,struct page * pg,unsigned offset,unsigned to)799 static int yaffs_prepare_write(struct file *f, struct page *pg,
800 unsigned offset, unsigned to)
801 {
802 T(YAFFS_TRACE_OS, ("yaffs_prepair_write\n"));
803
804 if (!Page_Uptodate(pg) && (offset || to < PAGE_CACHE_SIZE))
805 return yaffs_readpage_nolock(f, pg);
806 return 0;
807 }
808 #endif
809
810 #if (YAFFS_USE_WRITE_BEGIN_END > 0)
yaffs_write_end(struct file * filp,struct address_space * mapping,loff_t pos,unsigned len,unsigned copied,struct page * pg,void * fsdadata)811 static int yaffs_write_end(struct file *filp, struct address_space *mapping,
812 loff_t pos, unsigned len, unsigned copied,
813 struct page *pg, void *fsdadata)
814 {
815 int ret = 0;
816 void *addr, *kva;
817 uint32_t offset_into_page = pos & (PAGE_CACHE_SIZE - 1);
818
819 kva = kmap(pg);
820 addr = kva + offset_into_page;
821
822 T(YAFFS_TRACE_OS,
823 ("yaffs_write_end addr %x pos %x nBytes %d\n",
824 (unsigned) addr,
825 (int)pos, copied));
826
827 ret = yaffs_file_write(filp, addr, copied, &pos);
828
829 if (ret != copied) {
830 T(YAFFS_TRACE_OS,
831 ("yaffs_write_end not same size ret %d copied %d\n",
832 ret, copied));
833 SetPageError(pg);
834 ClearPageUptodate(pg);
835 } else {
836 SetPageUptodate(pg);
837 }
838
839 kunmap(pg);
840
841 yaffs_release_space(filp);
842 unlock_page(pg);
843 page_cache_release(pg);
844 return ret;
845 }
846 #else
847
yaffs_commit_write(struct file * f,struct page * pg,unsigned offset,unsigned to)848 static int yaffs_commit_write(struct file *f, struct page *pg, unsigned offset,
849 unsigned to)
850 {
851 void *addr, *kva;
852
853 loff_t pos = (((loff_t) pg->index) << PAGE_CACHE_SHIFT) + offset;
854 int nBytes = to - offset;
855 int nWritten;
856
857 unsigned spos = pos;
858 unsigned saddr;
859
860 kva = kmap(pg);
861 addr = kva + offset;
862
863 saddr = (unsigned) addr;
864
865 T(YAFFS_TRACE_OS,
866 ("yaffs_commit_write addr %x pos %x nBytes %d\n",
867 saddr, spos, nBytes));
868
869 nWritten = yaffs_file_write(f, addr, nBytes, &pos);
870
871 if (nWritten != nBytes) {
872 T(YAFFS_TRACE_OS,
873 ("yaffs_commit_write not same size nWritten %d nBytes %d\n",
874 nWritten, nBytes));
875 SetPageError(pg);
876 ClearPageUptodate(pg);
877 } else {
878 SetPageUptodate(pg);
879 }
880
881 kunmap(pg);
882
883 T(YAFFS_TRACE_OS,
884 ("yaffs_commit_write returning %d\n",
885 nWritten == nBytes ? 0 : nWritten));
886
887 return nWritten == nBytes ? 0 : nWritten;
888 }
889 #endif
890
891
yaffs_FillInodeFromObject(struct inode * inode,yaffs_Object * obj)892 static void yaffs_FillInodeFromObject(struct inode *inode, yaffs_Object *obj)
893 {
894 if (inode && obj) {
895
896
897 /* Check mode against the variant type and attempt to repair if broken. */
898 __u32 mode = obj->yst_mode;
899 switch (obj->variantType) {
900 case YAFFS_OBJECT_TYPE_FILE:
901 if (!S_ISREG(mode)) {
902 obj->yst_mode &= ~S_IFMT;
903 obj->yst_mode |= S_IFREG;
904 }
905
906 break;
907 case YAFFS_OBJECT_TYPE_SYMLINK:
908 if (!S_ISLNK(mode)) {
909 obj->yst_mode &= ~S_IFMT;
910 obj->yst_mode |= S_IFLNK;
911 }
912
913 break;
914 case YAFFS_OBJECT_TYPE_DIRECTORY:
915 if (!S_ISDIR(mode)) {
916 obj->yst_mode &= ~S_IFMT;
917 obj->yst_mode |= S_IFDIR;
918 }
919
920 break;
921 case YAFFS_OBJECT_TYPE_UNKNOWN:
922 case YAFFS_OBJECT_TYPE_HARDLINK:
923 case YAFFS_OBJECT_TYPE_SPECIAL:
924 default:
925 /* TODO? */
926 break;
927 }
928
929 inode->i_flags |= S_NOATIME;
930
931 inode->i_ino = obj->objectId;
932 inode->i_mode = obj->yst_mode;
933 inode->i_uid = obj->yst_uid;
934 inode->i_gid = obj->yst_gid;
935 #if (LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 19))
936 inode->i_blksize = inode->i_sb->s_blocksize;
937 #endif
938 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0))
939
940 inode->i_rdev = old_decode_dev(obj->yst_rdev);
941 inode->i_atime.tv_sec = (time_t) (obj->yst_atime);
942 inode->i_atime.tv_nsec = 0;
943 inode->i_mtime.tv_sec = (time_t) obj->yst_mtime;
944 inode->i_mtime.tv_nsec = 0;
945 inode->i_ctime.tv_sec = (time_t) obj->yst_ctime;
946 inode->i_ctime.tv_nsec = 0;
947 #else
948 inode->i_rdev = obj->yst_rdev;
949 inode->i_atime = obj->yst_atime;
950 inode->i_mtime = obj->yst_mtime;
951 inode->i_ctime = obj->yst_ctime;
952 #endif
953 inode->i_size = yaffs_GetObjectFileLength(obj);
954 inode->i_blocks = (inode->i_size + 511) >> 9;
955
956 inode->i_nlink = yaffs_GetObjectLinkCount(obj);
957
958 T(YAFFS_TRACE_OS,
959 ("yaffs_FillInode mode %x uid %d gid %d size %d count %d\n",
960 inode->i_mode, inode->i_uid, inode->i_gid,
961 (int)inode->i_size, atomic_read(&inode->i_count)));
962
963 switch (obj->yst_mode & S_IFMT) {
964 default: /* fifo, device or socket */
965 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0))
966 init_special_inode(inode, obj->yst_mode,
967 old_decode_dev(obj->yst_rdev));
968 #else
969 init_special_inode(inode, obj->yst_mode,
970 (dev_t) (obj->yst_rdev));
971 #endif
972 break;
973 case S_IFREG: /* file */
974 inode->i_op = &yaffs_file_inode_operations;
975 inode->i_fop = &yaffs_file_operations;
976 inode->i_mapping->a_ops =
977 &yaffs_file_address_operations;
978 break;
979 case S_IFDIR: /* directory */
980 inode->i_op = &yaffs_dir_inode_operations;
981 inode->i_fop = &yaffs_dir_operations;
982 break;
983 case S_IFLNK: /* symlink */
984 inode->i_op = &yaffs_symlink_inode_operations;
985 break;
986 }
987
988 yaffs_InodeToObjectLV(inode) = obj;
989
990 obj->myInode = inode;
991
992 } else {
993 T(YAFFS_TRACE_OS,
994 ("yaffs_FileInode invalid parameters\n"));
995 }
996
997 }
998
yaffs_get_inode(struct super_block * sb,int mode,int dev,yaffs_Object * obj)999 struct inode *yaffs_get_inode(struct super_block *sb, int mode, int dev,
1000 yaffs_Object *obj)
1001 {
1002 struct inode *inode;
1003
1004 if (!sb) {
1005 T(YAFFS_TRACE_OS,
1006 ("yaffs_get_inode for NULL super_block!!\n"));
1007 return NULL;
1008
1009 }
1010
1011 if (!obj) {
1012 T(YAFFS_TRACE_OS,
1013 ("yaffs_get_inode for NULL object!!\n"));
1014 return NULL;
1015
1016 }
1017
1018 T(YAFFS_TRACE_OS,
1019 ("yaffs_get_inode for object %d\n", obj->objectId));
1020
1021 inode = Y_IGET(sb, obj->objectId);
1022 if (IS_ERR(inode))
1023 return NULL;
1024
1025 /* NB Side effect: iget calls back to yaffs_read_inode(). */
1026 /* iget also increments the inode's i_count */
1027 /* NB You can't be holding grossLock or deadlock will happen! */
1028
1029 return inode;
1030 }
1031
yaffs_file_write(struct file * f,const char * buf,size_t n,loff_t * pos)1032 static ssize_t yaffs_file_write(struct file *f, const char *buf, size_t n,
1033 loff_t *pos)
1034 {
1035 yaffs_Object *obj;
1036 int nWritten, ipos;
1037 struct inode *inode;
1038 yaffs_Device *dev;
1039
1040 obj = yaffs_DentryToObject(f->f_dentry);
1041
1042 dev = obj->myDev;
1043
1044 yaffs_GrossLock(dev);
1045
1046 inode = f->f_dentry->d_inode;
1047
1048 if (!S_ISBLK(inode->i_mode) && f->f_flags & O_APPEND)
1049 ipos = inode->i_size;
1050 else
1051 ipos = *pos;
1052
1053 if (!obj)
1054 T(YAFFS_TRACE_OS,
1055 ("yaffs_file_write: hey obj is null!\n"));
1056 else
1057 T(YAFFS_TRACE_OS,
1058 ("yaffs_file_write about to write writing %zu bytes"
1059 "to object %d at %d\n",
1060 n, obj->objectId, ipos));
1061
1062 nWritten = yaffs_WriteDataToFile(obj, buf, ipos, n, 0);
1063
1064 T(YAFFS_TRACE_OS,
1065 ("yaffs_file_write writing %zu bytes, %d written at %d\n",
1066 n, nWritten, ipos));
1067
1068 if (nWritten > 0) {
1069 ipos += nWritten;
1070 *pos = ipos;
1071 if (ipos > inode->i_size) {
1072 inode->i_size = ipos;
1073 inode->i_blocks = (ipos + 511) >> 9;
1074
1075 T(YAFFS_TRACE_OS,
1076 ("yaffs_file_write size updated to %d bytes, "
1077 "%d blocks\n",
1078 ipos, (int)(inode->i_blocks)));
1079 }
1080
1081 }
1082 yaffs_GrossUnlock(dev);
1083 return (nWritten == 0) && (n > 0) ? -ENOSPC : nWritten;
1084 }
1085
1086 /* Space holding and freeing is done to ensure we have space available for write_begin/end */
1087 /* For now we just assume few parallel writes and check against a small number. */
1088 /* Todo: need to do this with a counter to handle parallel reads better */
1089
yaffs_hold_space(struct file * f)1090 static ssize_t yaffs_hold_space(struct file *f)
1091 {
1092 yaffs_Object *obj;
1093 yaffs_Device *dev;
1094
1095 int nFreeChunks;
1096
1097
1098 obj = yaffs_DentryToObject(f->f_dentry);
1099
1100 dev = obj->myDev;
1101
1102 yaffs_GrossLock(dev);
1103
1104 nFreeChunks = yaffs_GetNumberOfFreeChunks(dev);
1105
1106 yaffs_GrossUnlock(dev);
1107
1108 return (nFreeChunks > 20) ? 1 : 0;
1109 }
1110
yaffs_release_space(struct file * f)1111 static void yaffs_release_space(struct file *f)
1112 {
1113 yaffs_Object *obj;
1114 yaffs_Device *dev;
1115
1116
1117 obj = yaffs_DentryToObject(f->f_dentry);
1118
1119 dev = obj->myDev;
1120
1121 yaffs_GrossLock(dev);
1122
1123
1124 yaffs_GrossUnlock(dev);
1125 }
1126
yaffs_readdir(struct file * f,void * dirent,filldir_t filldir)1127 static int yaffs_readdir(struct file *f, void *dirent, filldir_t filldir)
1128 {
1129 yaffs_Object *obj;
1130 yaffs_Device *dev;
1131 struct inode *inode = f->f_dentry->d_inode;
1132 unsigned long offset, curoffs;
1133 struct ylist_head *i;
1134 yaffs_Object *l;
1135
1136 char name[YAFFS_MAX_NAME_LENGTH + 1];
1137
1138 obj = yaffs_DentryToObject(f->f_dentry);
1139 dev = obj->myDev;
1140
1141 yaffs_GrossLock(dev);
1142
1143 offset = f->f_pos;
1144
1145 T(YAFFS_TRACE_OS, ("yaffs_readdir: starting at %d\n", (int)offset));
1146
1147 if (offset == 0) {
1148 T(YAFFS_TRACE_OS,
1149 ("yaffs_readdir: entry . ino %d \n",
1150 (int)inode->i_ino));
1151 if (filldir(dirent, ".", 1, offset, inode->i_ino, DT_DIR) < 0)
1152 goto out;
1153 offset++;
1154 f->f_pos++;
1155 }
1156 if (offset == 1) {
1157 T(YAFFS_TRACE_OS,
1158 ("yaffs_readdir: entry .. ino %d \n",
1159 (int)f->f_dentry->d_parent->d_inode->i_ino));
1160 if (filldir(dirent, "..", 2, offset,
1161 f->f_dentry->d_parent->d_inode->i_ino, DT_DIR) < 0)
1162 goto out;
1163 offset++;
1164 f->f_pos++;
1165 }
1166
1167 curoffs = 1;
1168
1169 /* If the directory has changed since the open or last call to
1170 readdir, rewind to after the 2 canned entries. */
1171
1172 if (f->f_version != inode->i_version) {
1173 offset = 2;
1174 f->f_pos = offset;
1175 f->f_version = inode->i_version;
1176 }
1177
1178 ylist_for_each(i, &obj->variant.directoryVariant.children) {
1179 curoffs++;
1180 if (curoffs >= offset) {
1181 l = ylist_entry(i, yaffs_Object, siblings);
1182
1183 yaffs_GetObjectName(l, name,
1184 YAFFS_MAX_NAME_LENGTH + 1);
1185 T(YAFFS_TRACE_OS,
1186 ("yaffs_readdir: %s inode %d\n", name,
1187 yaffs_GetObjectInode(l)));
1188
1189 if (filldir(dirent,
1190 name,
1191 strlen(name),
1192 offset,
1193 yaffs_GetObjectInode(l),
1194 yaffs_GetObjectType(l)) < 0)
1195 goto up_and_out;
1196
1197 offset++;
1198 f->f_pos++;
1199 }
1200 }
1201
1202 up_and_out:
1203 out:
1204 yaffs_GrossUnlock(dev);
1205
1206 return 0;
1207 }
1208
1209 /*
1210 * File creation. Allocate an inode, and we're done..
1211 */
1212
1213 #if LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 29)
1214 #define YCRED(x) x
1215 #else
1216 #define YCRED(x) (x->cred)
1217 #endif
1218
1219 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0))
yaffs_mknod(struct inode * dir,struct dentry * dentry,int mode,dev_t rdev)1220 static int yaffs_mknod(struct inode *dir, struct dentry *dentry, int mode,
1221 dev_t rdev)
1222 #else
1223 static int yaffs_mknod(struct inode *dir, struct dentry *dentry, int mode,
1224 int rdev)
1225 #endif
1226 {
1227 struct inode *inode;
1228
1229 yaffs_Object *obj = NULL;
1230 yaffs_Device *dev;
1231
1232 yaffs_Object *parent = yaffs_InodeToObject(dir);
1233
1234 int error = -ENOSPC;
1235 uid_t uid = YCRED(current)->fsuid;
1236 gid_t gid = (dir->i_mode & S_ISGID) ? dir->i_gid : YCRED(current)->fsgid;
1237
1238 if ((dir->i_mode & S_ISGID) && S_ISDIR(mode))
1239 mode |= S_ISGID;
1240
1241 if (parent) {
1242 T(YAFFS_TRACE_OS,
1243 ("yaffs_mknod: parent object %d type %d\n",
1244 parent->objectId, parent->variantType));
1245 } else {
1246 T(YAFFS_TRACE_OS,
1247 ("yaffs_mknod: could not get parent object\n"));
1248 return -EPERM;
1249 }
1250
1251 T(YAFFS_TRACE_OS, ("yaffs_mknod: making oject for %s, "
1252 "mode %x dev %x\n",
1253 dentry->d_name.name, mode, rdev));
1254
1255 dev = parent->myDev;
1256
1257 yaffs_GrossLock(dev);
1258
1259 switch (mode & S_IFMT) {
1260 default:
1261 /* Special (socket, fifo, device...) */
1262 T(YAFFS_TRACE_OS, ("yaffs_mknod: making special\n"));
1263 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0))
1264 obj = yaffs_MknodSpecial(parent, dentry->d_name.name, mode, uid,
1265 gid, old_encode_dev(rdev));
1266 #else
1267 obj = yaffs_MknodSpecial(parent, dentry->d_name.name, mode, uid,
1268 gid, rdev);
1269 #endif
1270 break;
1271 case S_IFREG: /* file */
1272 T(YAFFS_TRACE_OS, ("yaffs_mknod: making file\n"));
1273 obj = yaffs_MknodFile(parent, dentry->d_name.name, mode, uid,
1274 gid);
1275 break;
1276 case S_IFDIR: /* directory */
1277 T(YAFFS_TRACE_OS,
1278 ("yaffs_mknod: making directory\n"));
1279 obj = yaffs_MknodDirectory(parent, dentry->d_name.name, mode,
1280 uid, gid);
1281 break;
1282 case S_IFLNK: /* symlink */
1283 T(YAFFS_TRACE_OS, ("yaffs_mknod: making symlink\n"));
1284 obj = NULL; /* Do we ever get here? */
1285 break;
1286 }
1287
1288 /* Can not call yaffs_get_inode() with gross lock held */
1289 yaffs_GrossUnlock(dev);
1290
1291 if (obj) {
1292 inode = yaffs_get_inode(dir->i_sb, mode, rdev, obj);
1293 d_instantiate(dentry, inode);
1294 update_dir_time(dir);
1295 T(YAFFS_TRACE_OS,
1296 ("yaffs_mknod created object %d count = %d\n",
1297 obj->objectId, atomic_read(&inode->i_count)));
1298 error = 0;
1299 } else {
1300 T(YAFFS_TRACE_OS,
1301 ("yaffs_mknod failed making object\n"));
1302 error = -ENOMEM;
1303 }
1304
1305 return error;
1306 }
1307
yaffs_mkdir(struct inode * dir,struct dentry * dentry,int mode)1308 static int yaffs_mkdir(struct inode *dir, struct dentry *dentry, int mode)
1309 {
1310 int retVal;
1311 T(YAFFS_TRACE_OS, ("yaffs_mkdir\n"));
1312 retVal = yaffs_mknod(dir, dentry, mode | S_IFDIR, 0);
1313 return retVal;
1314 }
1315
1316 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0))
yaffs_create(struct inode * dir,struct dentry * dentry,int mode,struct nameidata * n)1317 static int yaffs_create(struct inode *dir, struct dentry *dentry, int mode,
1318 struct nameidata *n)
1319 #else
1320 static int yaffs_create(struct inode *dir, struct dentry *dentry, int mode)
1321 #endif
1322 {
1323 T(YAFFS_TRACE_OS, ("yaffs_create\n"));
1324 return yaffs_mknod(dir, dentry, mode | S_IFREG, 0);
1325 }
1326
yaffs_unlink(struct inode * dir,struct dentry * dentry)1327 static int yaffs_unlink(struct inode *dir, struct dentry *dentry)
1328 {
1329 int retVal;
1330
1331 yaffs_Device *dev;
1332
1333 T(YAFFS_TRACE_OS,
1334 ("yaffs_unlink %d:%s\n", (int)(dir->i_ino),
1335 dentry->d_name.name));
1336
1337 dev = yaffs_InodeToObject(dir)->myDev;
1338
1339 yaffs_GrossLock(dev);
1340
1341 retVal = yaffs_Unlink(yaffs_InodeToObject(dir), dentry->d_name.name);
1342
1343 if (retVal == YAFFS_OK) {
1344 dentry->d_inode->i_nlink--;
1345 dir->i_version++;
1346 yaffs_GrossUnlock(dev);
1347 mark_inode_dirty(dentry->d_inode);
1348 update_dir_time(dir);
1349 return 0;
1350 }
1351 yaffs_GrossUnlock(dev);
1352 return -ENOTEMPTY;
1353 }
1354
1355 /*
1356 * Create a link...
1357 */
yaffs_link(struct dentry * old_dentry,struct inode * dir,struct dentry * dentry)1358 static int yaffs_link(struct dentry *old_dentry, struct inode *dir,
1359 struct dentry *dentry)
1360 {
1361 struct inode *inode = old_dentry->d_inode;
1362 yaffs_Object *obj = NULL;
1363 yaffs_Object *link = NULL;
1364 yaffs_Device *dev;
1365
1366 T(YAFFS_TRACE_OS, ("yaffs_link\n"));
1367
1368 obj = yaffs_InodeToObject(inode);
1369 dev = obj->myDev;
1370
1371 yaffs_GrossLock(dev);
1372
1373 if (!S_ISDIR(inode->i_mode)) /* Don't link directories */
1374 link = yaffs_Link(yaffs_InodeToObject(dir), dentry->d_name.name,
1375 obj);
1376
1377 if (link) {
1378 old_dentry->d_inode->i_nlink = yaffs_GetObjectLinkCount(obj);
1379 d_instantiate(dentry, old_dentry->d_inode);
1380 atomic_inc(&old_dentry->d_inode->i_count);
1381 T(YAFFS_TRACE_OS,
1382 ("yaffs_link link count %d i_count %d\n",
1383 old_dentry->d_inode->i_nlink,
1384 atomic_read(&old_dentry->d_inode->i_count)));
1385 }
1386
1387 yaffs_GrossUnlock(dev);
1388
1389 if (link){
1390 update_dir_time(dir);
1391 return 0;
1392 }
1393
1394 return -EPERM;
1395 }
1396
yaffs_symlink(struct inode * dir,struct dentry * dentry,const char * symname)1397 static int yaffs_symlink(struct inode *dir, struct dentry *dentry,
1398 const char *symname)
1399 {
1400 yaffs_Object *obj;
1401 yaffs_Device *dev;
1402 uid_t uid = YCRED(current)->fsuid;
1403 gid_t gid = (dir->i_mode & S_ISGID) ? dir->i_gid : YCRED(current)->fsgid;
1404
1405 T(YAFFS_TRACE_OS, ("yaffs_symlink\n"));
1406
1407 dev = yaffs_InodeToObject(dir)->myDev;
1408 yaffs_GrossLock(dev);
1409 obj = yaffs_MknodSymLink(yaffs_InodeToObject(dir), dentry->d_name.name,
1410 S_IFLNK | S_IRWXUGO, uid, gid, symname);
1411 yaffs_GrossUnlock(dev);
1412
1413 if (obj) {
1414 struct inode *inode;
1415
1416 inode = yaffs_get_inode(dir->i_sb, obj->yst_mode, 0, obj);
1417 d_instantiate(dentry, inode);
1418 update_dir_time(dir);
1419 T(YAFFS_TRACE_OS, ("symlink created OK\n"));
1420 return 0;
1421 } else {
1422 T(YAFFS_TRACE_OS, ("symlink not created\n"));
1423 }
1424
1425 return -ENOMEM;
1426 }
1427
yaffs_sync_object(struct file * file,struct dentry * dentry,int datasync)1428 static int yaffs_sync_object(struct file *file, struct dentry *dentry,
1429 int datasync)
1430 {
1431
1432 yaffs_Object *obj;
1433 yaffs_Device *dev;
1434
1435 obj = yaffs_DentryToObject(dentry);
1436
1437 dev = obj->myDev;
1438
1439 T(YAFFS_TRACE_OS, ("yaffs_sync_object\n"));
1440 yaffs_GrossLock(dev);
1441 yaffs_FlushFile(obj, 1);
1442 yaffs_GrossUnlock(dev);
1443 return 0;
1444 }
1445
1446 /*
1447 * The VFS layer already does all the dentry stuff for rename.
1448 *
1449 * NB: POSIX says you can rename an object over an old object of the same name
1450 */
yaffs_rename(struct inode * old_dir,struct dentry * old_dentry,struct inode * new_dir,struct dentry * new_dentry)1451 static int yaffs_rename(struct inode *old_dir, struct dentry *old_dentry,
1452 struct inode *new_dir, struct dentry *new_dentry)
1453 {
1454 yaffs_Device *dev;
1455 int retVal = YAFFS_FAIL;
1456 yaffs_Object *target;
1457
1458 T(YAFFS_TRACE_OS, ("yaffs_rename\n"));
1459 dev = yaffs_InodeToObject(old_dir)->myDev;
1460
1461 yaffs_GrossLock(dev);
1462
1463 /* Check if the target is an existing directory that is not empty. */
1464 target = yaffs_FindObjectByName(yaffs_InodeToObject(new_dir),
1465 new_dentry->d_name.name);
1466
1467
1468
1469 if (target && target->variantType == YAFFS_OBJECT_TYPE_DIRECTORY &&
1470 !ylist_empty(&target->variant.directoryVariant.children)) {
1471
1472 T(YAFFS_TRACE_OS, ("target is non-empty dir\n"));
1473
1474 retVal = YAFFS_FAIL;
1475 } else {
1476 /* Now does unlinking internally using shadowing mechanism */
1477 T(YAFFS_TRACE_OS, ("calling yaffs_RenameObject\n"));
1478
1479 retVal = yaffs_RenameObject(yaffs_InodeToObject(old_dir),
1480 old_dentry->d_name.name,
1481 yaffs_InodeToObject(new_dir),
1482 new_dentry->d_name.name);
1483 }
1484 yaffs_GrossUnlock(dev);
1485
1486 if (retVal == YAFFS_OK) {
1487 if (target) {
1488 new_dentry->d_inode->i_nlink--;
1489 mark_inode_dirty(new_dentry->d_inode);
1490 }
1491
1492 update_dir_time(old_dir);
1493 if(old_dir != new_dir)
1494 update_dir_time(new_dir);
1495 return 0;
1496 } else {
1497 return -ENOTEMPTY;
1498 }
1499 }
1500
yaffs_setattr(struct dentry * dentry,struct iattr * attr)1501 static int yaffs_setattr(struct dentry *dentry, struct iattr *attr)
1502 {
1503 struct inode *inode = dentry->d_inode;
1504 int error;
1505 yaffs_Device *dev;
1506
1507 T(YAFFS_TRACE_OS,
1508 ("yaffs_setattr of object %d\n",
1509 yaffs_InodeToObject(inode)->objectId));
1510
1511 error = inode_change_ok(inode, attr);
1512 if (error == 0) {
1513 dev = yaffs_InodeToObject(inode)->myDev;
1514 yaffs_GrossLock(dev);
1515 if (yaffs_SetAttributes(yaffs_InodeToObject(inode), attr) ==
1516 YAFFS_OK) {
1517 error = 0;
1518 } else {
1519 error = -EPERM;
1520 }
1521 yaffs_GrossUnlock(dev);
1522 if (!error)
1523 error = inode_setattr(inode, attr);
1524 }
1525 return error;
1526 }
1527
1528 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 17))
yaffs_statfs(struct dentry * dentry,struct kstatfs * buf)1529 static int yaffs_statfs(struct dentry *dentry, struct kstatfs *buf)
1530 {
1531 yaffs_Device *dev = yaffs_DentryToObject(dentry)->myDev;
1532 struct super_block *sb = dentry->d_sb;
1533 #elif (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0))
1534 static int yaffs_statfs(struct super_block *sb, struct kstatfs *buf)
1535 {
1536 yaffs_Device *dev = yaffs_SuperToDevice(sb);
1537 #else
1538 static int yaffs_statfs(struct super_block *sb, struct statfs *buf)
1539 {
1540 yaffs_Device *dev = yaffs_SuperToDevice(sb);
1541 #endif
1542
1543 T(YAFFS_TRACE_OS, ("yaffs_statfs\n"));
1544
1545 yaffs_GrossLock(dev);
1546
1547 buf->f_type = YAFFS_MAGIC;
1548 buf->f_bsize = sb->s_blocksize;
1549 buf->f_namelen = 255;
1550
1551 if (dev->nDataBytesPerChunk & (dev->nDataBytesPerChunk - 1)) {
1552 /* Do this if chunk size is not a power of 2 */
1553
1554 uint64_t bytesInDev;
1555 uint64_t bytesFree;
1556
1557 bytesInDev = ((uint64_t)((dev->endBlock - dev->startBlock + 1))) *
1558 ((uint64_t)(dev->nChunksPerBlock * dev->nDataBytesPerChunk));
1559
1560 do_div(bytesInDev, sb->s_blocksize); /* bytesInDev becomes the number of blocks */
1561 buf->f_blocks = bytesInDev;
1562
1563 bytesFree = ((uint64_t)(yaffs_GetNumberOfFreeChunks(dev))) *
1564 ((uint64_t)(dev->nDataBytesPerChunk));
1565
1566 do_div(bytesFree, sb->s_blocksize);
1567
1568 buf->f_bfree = bytesFree;
1569
1570 } else if (sb->s_blocksize > dev->nDataBytesPerChunk) {
1571
1572 buf->f_blocks =
1573 (dev->endBlock - dev->startBlock + 1) *
1574 dev->nChunksPerBlock /
1575 (sb->s_blocksize / dev->nDataBytesPerChunk);
1576 buf->f_bfree =
1577 yaffs_GetNumberOfFreeChunks(dev) /
1578 (sb->s_blocksize / dev->nDataBytesPerChunk);
1579 } else {
1580 buf->f_blocks =
1581 (dev->endBlock - dev->startBlock + 1) *
1582 dev->nChunksPerBlock *
1583 (dev->nDataBytesPerChunk / sb->s_blocksize);
1584
1585 buf->f_bfree =
1586 yaffs_GetNumberOfFreeChunks(dev) *
1587 (dev->nDataBytesPerChunk / sb->s_blocksize);
1588 }
1589
1590 buf->f_files = 0;
1591 buf->f_ffree = 0;
1592 buf->f_bavail = buf->f_bfree;
1593
1594 yaffs_GrossUnlock(dev);
1595 return 0;
1596 }
1597
1598
1599 static int yaffs_do_sync_fs(struct super_block *sb)
1600 {
1601
1602 yaffs_Device *dev = yaffs_SuperToDevice(sb);
1603 T(YAFFS_TRACE_OS, ("yaffs_do_sync_fs\n"));
1604
1605 if (sb->s_dirt) {
1606 yaffs_GrossLock(dev);
1607
1608 if (dev) {
1609 yaffs_FlushEntireDeviceCache(dev);
1610 yaffs_CheckpointSave(dev);
1611 }
1612
1613 yaffs_GrossUnlock(dev);
1614
1615 sb->s_dirt = 0;
1616 }
1617 return 0;
1618 }
1619
1620
1621 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 17))
1622 static void yaffs_write_super(struct super_block *sb)
1623 #else
1624 static int yaffs_write_super(struct super_block *sb)
1625 #endif
1626 {
1627
1628 T(YAFFS_TRACE_OS, ("yaffs_write_super\n"));
1629 if (yaffs_auto_checkpoint >= 2)
1630 yaffs_do_sync_fs(sb);
1631 #if (LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 18))
1632 return 0;
1633 #endif
1634 }
1635
1636
1637 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 17))
1638 static int yaffs_sync_fs(struct super_block *sb, int wait)
1639 #else
1640 static int yaffs_sync_fs(struct super_block *sb)
1641 #endif
1642 {
1643 T(YAFFS_TRACE_OS, ("yaffs_sync_fs\n"));
1644
1645 if (yaffs_auto_checkpoint >= 1)
1646 yaffs_do_sync_fs(sb);
1647
1648 return 0;
1649 }
1650
1651 #ifdef YAFFS_USE_OWN_IGET
1652
1653 static struct inode *yaffs_iget(struct super_block *sb, unsigned long ino)
1654 {
1655 struct inode *inode;
1656 yaffs_Object *obj;
1657 yaffs_Device *dev = yaffs_SuperToDevice(sb);
1658
1659 T(YAFFS_TRACE_OS,
1660 ("yaffs_iget for %lu\n", ino));
1661
1662 inode = iget_locked(sb, ino);
1663 if (!inode)
1664 return ERR_PTR(-ENOMEM);
1665 if (!(inode->i_state & I_NEW))
1666 return inode;
1667
1668 /* NB This is called as a side effect of other functions, but
1669 * we had to release the lock to prevent deadlocks, so
1670 * need to lock again.
1671 */
1672
1673 yaffs_GrossLock(dev);
1674
1675 obj = yaffs_FindObjectByNumber(dev, inode->i_ino);
1676
1677 yaffs_FillInodeFromObject(inode, obj);
1678
1679 yaffs_GrossUnlock(dev);
1680
1681 unlock_new_inode(inode);
1682 return inode;
1683 }
1684
1685 #else
1686
1687 static void yaffs_read_inode(struct inode *inode)
1688 {
1689 /* NB This is called as a side effect of other functions, but
1690 * we had to release the lock to prevent deadlocks, so
1691 * need to lock again.
1692 */
1693
1694 yaffs_Object *obj;
1695 yaffs_Device *dev = yaffs_SuperToDevice(inode->i_sb);
1696
1697 T(YAFFS_TRACE_OS,
1698 ("yaffs_read_inode for %d\n", (int)inode->i_ino));
1699
1700 yaffs_GrossLock(dev);
1701
1702 obj = yaffs_FindObjectByNumber(dev, inode->i_ino);
1703
1704 yaffs_FillInodeFromObject(inode, obj);
1705
1706 yaffs_GrossUnlock(dev);
1707 }
1708
1709 #endif
1710
1711 static YLIST_HEAD(yaffs_dev_list);
1712
1713 #if 0 /* not used */
1714 static int yaffs_remount_fs(struct super_block *sb, int *flags, char *data)
1715 {
1716 yaffs_Device *dev = yaffs_SuperToDevice(sb);
1717
1718 if (*flags & MS_RDONLY) {
1719 struct mtd_info *mtd = yaffs_SuperToDevice(sb)->genericDevice;
1720
1721 T(YAFFS_TRACE_OS,
1722 ("yaffs_remount_fs: %s: RO\n", dev->name));
1723
1724 yaffs_GrossLock(dev);
1725
1726 yaffs_FlushEntireDeviceCache(dev);
1727
1728 yaffs_CheckpointSave(dev);
1729
1730 if (mtd->sync)
1731 mtd->sync(mtd);
1732
1733 yaffs_GrossUnlock(dev);
1734 } else {
1735 T(YAFFS_TRACE_OS,
1736 ("yaffs_remount_fs: %s: RW\n", dev->name));
1737 }
1738
1739 return 0;
1740 }
1741 #endif
1742
1743 static void yaffs_put_super(struct super_block *sb)
1744 {
1745 yaffs_Device *dev = yaffs_SuperToDevice(sb);
1746
1747 T(YAFFS_TRACE_OS, ("yaffs_put_super\n"));
1748
1749 yaffs_GrossLock(dev);
1750
1751 yaffs_FlushEntireDeviceCache(dev);
1752
1753 yaffs_CheckpointSave(dev);
1754
1755 if (dev->putSuperFunc)
1756 dev->putSuperFunc(sb);
1757
1758 yaffs_Deinitialise(dev);
1759
1760 yaffs_GrossUnlock(dev);
1761
1762 /* we assume this is protected by lock_kernel() in mount/umount */
1763 ylist_del(&dev->devList);
1764
1765 if (dev->spareBuffer) {
1766 YFREE(dev->spareBuffer);
1767 dev->spareBuffer = NULL;
1768 }
1769
1770 kfree(dev);
1771 }
1772
1773
1774 static void yaffs_MTDPutSuper(struct super_block *sb)
1775 {
1776 struct mtd_info *mtd = yaffs_SuperToDevice(sb)->genericDevice;
1777
1778 if (mtd->sync)
1779 mtd->sync(mtd);
1780
1781 put_mtd_device(mtd);
1782 }
1783
1784
1785 static void yaffs_MarkSuperBlockDirty(void *vsb)
1786 {
1787 struct super_block *sb = (struct super_block *)vsb;
1788
1789 T(YAFFS_TRACE_OS, ("yaffs_MarkSuperBlockDirty() sb = %p\n", sb));
1790 if (sb)
1791 sb->s_dirt = 1;
1792 }
1793
1794 typedef struct {
1795 int inband_tags;
1796 int skip_checkpoint_read;
1797 int skip_checkpoint_write;
1798 int no_cache;
1799 } yaffs_options;
1800
1801 #define MAX_OPT_LEN 20
1802 static int yaffs_parse_options(yaffs_options *options, const char *options_str)
1803 {
1804 char cur_opt[MAX_OPT_LEN + 1];
1805 int p;
1806 int error = 0;
1807
1808 /* Parse through the options which is a comma seperated list */
1809
1810 while (options_str && *options_str && !error) {
1811 memset(cur_opt, 0, MAX_OPT_LEN + 1);
1812 p = 0;
1813
1814 while (*options_str && *options_str != ',') {
1815 if (p < MAX_OPT_LEN) {
1816 cur_opt[p] = *options_str;
1817 p++;
1818 }
1819 options_str++;
1820 }
1821
1822 if (!strcmp(cur_opt, "inband-tags"))
1823 options->inband_tags = 1;
1824 else if (!strcmp(cur_opt, "no-cache"))
1825 options->no_cache = 1;
1826 else if (!strcmp(cur_opt, "no-checkpoint-read"))
1827 options->skip_checkpoint_read = 1;
1828 else if (!strcmp(cur_opt, "no-checkpoint-write"))
1829 options->skip_checkpoint_write = 1;
1830 else if (!strcmp(cur_opt, "no-checkpoint")) {
1831 options->skip_checkpoint_read = 1;
1832 options->skip_checkpoint_write = 1;
1833 } else {
1834 printk(KERN_INFO "yaffs: Bad mount option \"%s\"\n",
1835 cur_opt);
1836 error = 1;
1837 }
1838 }
1839
1840 return error;
1841 }
1842
1843 static struct super_block *yaffs_internal_read_super(int yaffsVersion,
1844 struct super_block *sb,
1845 void *data, int silent)
1846 {
1847 int nBlocks;
1848 struct inode *inode = NULL;
1849 struct dentry *root;
1850 yaffs_Device *dev = 0;
1851 char devname_buf[BDEVNAME_SIZE + 1];
1852 struct mtd_info *mtd;
1853 int err;
1854 char *data_str = (char *)data;
1855
1856 yaffs_options options;
1857
1858 sb->s_magic = YAFFS_MAGIC;
1859 sb->s_op = &yaffs_super_ops;
1860 sb->s_flags |= MS_NOATIME;
1861
1862 if (!sb)
1863 printk(KERN_INFO "yaffs: sb is NULL\n");
1864 else if (!sb->s_dev)
1865 printk(KERN_INFO "yaffs: sb->s_dev is NULL\n");
1866 else if (!yaffs_devname(sb, devname_buf))
1867 printk(KERN_INFO "yaffs: devname is NULL\n");
1868 else
1869 printk(KERN_INFO "yaffs: dev is %d name is \"%s\"\n",
1870 sb->s_dev,
1871 yaffs_devname(sb, devname_buf));
1872
1873 if (!data_str)
1874 data_str = "";
1875
1876 printk(KERN_INFO "yaffs: passed flags \"%s\"\n", data_str);
1877
1878 memset(&options, 0, sizeof(options));
1879
1880 if (yaffs_parse_options(&options, data_str)) {
1881 /* Option parsing failed */
1882 return NULL;
1883 }
1884
1885
1886 sb->s_blocksize = PAGE_CACHE_SIZE;
1887 sb->s_blocksize_bits = PAGE_CACHE_SHIFT;
1888 T(YAFFS_TRACE_OS, ("yaffs_read_super: Using yaffs%d\n", yaffsVersion));
1889 T(YAFFS_TRACE_OS,
1890 ("yaffs_read_super: block size %d\n", (int)(sb->s_blocksize)));
1891
1892 #ifdef CONFIG_YAFFS_DISABLE_WRITE_VERIFY
1893 T(YAFFS_TRACE_OS,
1894 ("yaffs: Write verification disabled. All guarantees "
1895 "null and void\n"));
1896 #endif
1897
1898 T(YAFFS_TRACE_ALWAYS, ("yaffs: Attempting MTD mount on %u.%u, "
1899 "\"%s\"\n",
1900 MAJOR(sb->s_dev), MINOR(sb->s_dev),
1901 yaffs_devname(sb, devname_buf)));
1902
1903 /* Check it's an mtd device..... */
1904 if (MAJOR(sb->s_dev) != MTD_BLOCK_MAJOR)
1905 return NULL; /* This isn't an mtd device */
1906
1907 /* Get the device */
1908 mtd = get_mtd_device(NULL, MINOR(sb->s_dev));
1909 if (!mtd) {
1910 T(YAFFS_TRACE_ALWAYS,
1911 ("yaffs: MTD device #%u doesn't appear to exist\n",
1912 MINOR(sb->s_dev)));
1913 return NULL;
1914 }
1915 /* Check it's NAND */
1916 if (mtd->type != MTD_NANDFLASH) {
1917 T(YAFFS_TRACE_ALWAYS,
1918 ("yaffs: MTD device is not NAND it's type %d\n", mtd->type));
1919 return NULL;
1920 }
1921
1922 T(YAFFS_TRACE_OS, (" erase %p\n", mtd->erase));
1923 T(YAFFS_TRACE_OS, (" read %p\n", mtd->read));
1924 T(YAFFS_TRACE_OS, (" write %p\n", mtd->write));
1925 T(YAFFS_TRACE_OS, (" readoob %p\n", mtd->read_oob));
1926 T(YAFFS_TRACE_OS, (" writeoob %p\n", mtd->write_oob));
1927 T(YAFFS_TRACE_OS, (" block_isbad %p\n", mtd->block_isbad));
1928 T(YAFFS_TRACE_OS, (" block_markbad %p\n", mtd->block_markbad));
1929 T(YAFFS_TRACE_OS, (" %s %d\n", WRITE_SIZE_STR, WRITE_SIZE(mtd)));
1930 T(YAFFS_TRACE_OS, (" oobsize %d\n", mtd->oobsize));
1931 T(YAFFS_TRACE_OS, (" erasesize %d\n", mtd->erasesize));
1932 #if LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 29)
1933 T(YAFFS_TRACE_OS, (" size %u\n", mtd->size));
1934 #else
1935 T(YAFFS_TRACE_OS, (" size %lld\n", mtd->size));
1936 #endif
1937
1938 #ifdef CONFIG_YAFFS_AUTO_YAFFS2
1939
1940 if (yaffsVersion == 1 && WRITE_SIZE(mtd) >= 2048) {
1941 T(YAFFS_TRACE_ALWAYS, ("yaffs: auto selecting yaffs2\n"));
1942 yaffsVersion = 2;
1943 }
1944
1945 /* Added NCB 26/5/2006 for completeness */
1946 if (yaffsVersion == 2 && !options.inband_tags && WRITE_SIZE(mtd) == 512) {
1947 T(YAFFS_TRACE_ALWAYS, ("yaffs: auto selecting yaffs1\n"));
1948 yaffsVersion = 1;
1949 }
1950
1951 #endif
1952
1953 if (yaffsVersion == 2) {
1954 /* Check for version 2 style functions */
1955 if (!mtd->erase ||
1956 !mtd->block_isbad ||
1957 !mtd->block_markbad ||
1958 !mtd->read ||
1959 !mtd->write ||
1960 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 17))
1961 !mtd->read_oob || !mtd->write_oob) {
1962 #else
1963 !mtd->write_ecc ||
1964 !mtd->read_ecc || !mtd->read_oob || !mtd->write_oob) {
1965 #endif
1966 T(YAFFS_TRACE_ALWAYS,
1967 ("yaffs: MTD device does not support required "
1968 "functions\n"));;
1969 return NULL;
1970 }
1971
1972 if ((WRITE_SIZE(mtd) < YAFFS_MIN_YAFFS2_CHUNK_SIZE ||
1973 mtd->oobsize < YAFFS_MIN_YAFFS2_SPARE_SIZE) &&
1974 !options.inband_tags) {
1975 T(YAFFS_TRACE_ALWAYS,
1976 ("yaffs: MTD device does not have the "
1977 "right page sizes\n"));
1978 return NULL;
1979 }
1980 } else {
1981 /* Check for V1 style functions */
1982 if (!mtd->erase ||
1983 !mtd->read ||
1984 !mtd->write ||
1985 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 17))
1986 !mtd->read_oob || !mtd->write_oob) {
1987 #else
1988 !mtd->write_ecc ||
1989 !mtd->read_ecc || !mtd->read_oob || !mtd->write_oob) {
1990 #endif
1991 T(YAFFS_TRACE_ALWAYS,
1992 ("yaffs: MTD device does not support required "
1993 "functions\n"));;
1994 return NULL;
1995 }
1996
1997 if (WRITE_SIZE(mtd) < YAFFS_BYTES_PER_CHUNK ||
1998 mtd->oobsize != YAFFS_BYTES_PER_SPARE) {
1999 T(YAFFS_TRACE_ALWAYS,
2000 ("yaffs: MTD device does not support have the "
2001 "right page sizes\n"));
2002 return NULL;
2003 }
2004 }
2005
2006 /* OK, so if we got here, we have an MTD that's NAND and looks
2007 * like it has the right capabilities
2008 * Set the yaffs_Device up for mtd
2009 */
2010
2011 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0))
2012 sb->s_fs_info = dev = kmalloc(sizeof(yaffs_Device), GFP_KERNEL);
2013 #else
2014 sb->u.generic_sbp = dev = kmalloc(sizeof(yaffs_Device), GFP_KERNEL);
2015 #endif
2016 if (!dev) {
2017 /* Deep shit could not allocate device structure */
2018 T(YAFFS_TRACE_ALWAYS,
2019 ("yaffs_read_super: Failed trying to allocate "
2020 "yaffs_Device. \n"));
2021 return NULL;
2022 }
2023
2024 memset(dev, 0, sizeof(yaffs_Device));
2025 dev->genericDevice = mtd;
2026 dev->name = mtd->name;
2027
2028 /* Set up the memory size parameters.... */
2029
2030 nBlocks = YCALCBLOCKS(mtd->size, (YAFFS_CHUNKS_PER_BLOCK * YAFFS_BYTES_PER_CHUNK));
2031
2032 dev->startBlock = 0;
2033 dev->endBlock = nBlocks - 1;
2034 dev->nChunksPerBlock = YAFFS_CHUNKS_PER_BLOCK;
2035 dev->totalBytesPerChunk = YAFFS_BYTES_PER_CHUNK;
2036 dev->nReservedBlocks = 5;
2037 dev->nShortOpCaches = (options.no_cache) ? 0 : 10;
2038 dev->inbandTags = options.inband_tags;
2039
2040 /* ... and the functions. */
2041 if (yaffsVersion == 2) {
2042 dev->writeChunkWithTagsToNAND =
2043 nandmtd2_WriteChunkWithTagsToNAND;
2044 dev->readChunkWithTagsFromNAND =
2045 nandmtd2_ReadChunkWithTagsFromNAND;
2046 dev->markNANDBlockBad = nandmtd2_MarkNANDBlockBad;
2047 dev->queryNANDBlock = nandmtd2_QueryNANDBlock;
2048 dev->spareBuffer = YMALLOC(mtd->oobsize);
2049 dev->isYaffs2 = 1;
2050 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 17))
2051 dev->totalBytesPerChunk = mtd->writesize;
2052 dev->nChunksPerBlock = mtd->erasesize / mtd->writesize;
2053 #else
2054 dev->totalBytesPerChunk = mtd->oobblock;
2055 dev->nChunksPerBlock = mtd->erasesize / mtd->oobblock;
2056 #endif
2057 nBlocks = YCALCBLOCKS(mtd->size, mtd->erasesize);
2058
2059 dev->startBlock = 0;
2060 dev->endBlock = nBlocks - 1;
2061 } else {
2062 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 17))
2063 /* use the MTD interface in yaffs_mtdif1.c */
2064 dev->writeChunkWithTagsToNAND =
2065 nandmtd1_WriteChunkWithTagsToNAND;
2066 dev->readChunkWithTagsFromNAND =
2067 nandmtd1_ReadChunkWithTagsFromNAND;
2068 dev->markNANDBlockBad = nandmtd1_MarkNANDBlockBad;
2069 dev->queryNANDBlock = nandmtd1_QueryNANDBlock;
2070 #else
2071 dev->writeChunkToNAND = nandmtd_WriteChunkToNAND;
2072 dev->readChunkFromNAND = nandmtd_ReadChunkFromNAND;
2073 #endif
2074 dev->isYaffs2 = 0;
2075 }
2076 /* ... and common functions */
2077 dev->eraseBlockInNAND = nandmtd_EraseBlockInNAND;
2078 dev->initialiseNAND = nandmtd_InitialiseNAND;
2079
2080 dev->putSuperFunc = yaffs_MTDPutSuper;
2081
2082 dev->superBlock = (void *)sb;
2083 dev->markSuperBlockDirty = yaffs_MarkSuperBlockDirty;
2084
2085
2086 #ifndef CONFIG_YAFFS_DOES_ECC
2087 dev->useNANDECC = 1;
2088 #endif
2089
2090 #ifdef CONFIG_YAFFS_DISABLE_WIDE_TNODES
2091 dev->wideTnodesDisabled = 1;
2092 #endif
2093
2094 dev->skipCheckpointRead = options.skip_checkpoint_read;
2095 dev->skipCheckpointWrite = options.skip_checkpoint_write;
2096
2097 /* we assume this is protected by lock_kernel() in mount/umount */
2098 ylist_add_tail(&dev->devList, &yaffs_dev_list);
2099
2100 init_MUTEX(&dev->grossLock);
2101
2102 yaffs_GrossLock(dev);
2103
2104 err = yaffs_GutsInitialise(dev);
2105
2106 T(YAFFS_TRACE_OS,
2107 ("yaffs_read_super: guts initialised %s\n",
2108 (err == YAFFS_OK) ? "OK" : "FAILED"));
2109
2110 /* Release lock before yaffs_get_inode() */
2111 yaffs_GrossUnlock(dev);
2112
2113 /* Create root inode */
2114 if (err == YAFFS_OK)
2115 inode = yaffs_get_inode(sb, S_IFDIR | 0755, 0,
2116 yaffs_Root(dev));
2117
2118 if (!inode)
2119 return NULL;
2120
2121 inode->i_op = &yaffs_dir_inode_operations;
2122 inode->i_fop = &yaffs_dir_operations;
2123
2124 T(YAFFS_TRACE_OS, ("yaffs_read_super: got root inode\n"));
2125
2126 root = d_alloc_root(inode);
2127
2128 T(YAFFS_TRACE_OS, ("yaffs_read_super: d_alloc_root done\n"));
2129
2130 if (!root) {
2131 iput(inode);
2132 return NULL;
2133 }
2134 sb->s_root = root;
2135 sb->s_dirt = !dev->isCheckpointed;
2136 T(YAFFS_TRACE_ALWAYS,
2137 ("yaffs_read_super: isCheckpointed %d\n", dev->isCheckpointed));
2138
2139 T(YAFFS_TRACE_OS, ("yaffs_read_super: done\n"));
2140 return sb;
2141 }
2142
2143
2144 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0))
2145 static int yaffs_internal_read_super_mtd(struct super_block *sb, void *data,
2146 int silent)
2147 {
2148 return yaffs_internal_read_super(1, sb, data, silent) ? 0 : -EINVAL;
2149 }
2150
2151 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 17))
2152 static int yaffs_read_super(struct file_system_type *fs,
2153 int flags, const char *dev_name,
2154 void *data, struct vfsmount *mnt)
2155 {
2156
2157 return get_sb_bdev(fs, flags, dev_name, data,
2158 yaffs_internal_read_super_mtd, mnt);
2159 }
2160 #else
2161 static struct super_block *yaffs_read_super(struct file_system_type *fs,
2162 int flags, const char *dev_name,
2163 void *data)
2164 {
2165
2166 return get_sb_bdev(fs, flags, dev_name, data,
2167 yaffs_internal_read_super_mtd);
2168 }
2169 #endif
2170
2171 static struct file_system_type yaffs_fs_type = {
2172 .owner = THIS_MODULE,
2173 .name = "yaffs",
2174 .get_sb = yaffs_read_super,
2175 .kill_sb = kill_block_super,
2176 .fs_flags = FS_REQUIRES_DEV,
2177 };
2178 #else
2179 static struct super_block *yaffs_read_super(struct super_block *sb, void *data,
2180 int silent)
2181 {
2182 return yaffs_internal_read_super(1, sb, data, silent);
2183 }
2184
2185 static DECLARE_FSTYPE(yaffs_fs_type, "yaffs", yaffs_read_super,
2186 FS_REQUIRES_DEV);
2187 #endif
2188
2189
2190 #ifdef CONFIG_YAFFS_YAFFS2
2191
2192 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0))
2193 static int yaffs2_internal_read_super_mtd(struct super_block *sb, void *data,
2194 int silent)
2195 {
2196 return yaffs_internal_read_super(2, sb, data, silent) ? 0 : -EINVAL;
2197 }
2198
2199 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 17))
2200 static int yaffs2_read_super(struct file_system_type *fs,
2201 int flags, const char *dev_name, void *data,
2202 struct vfsmount *mnt)
2203 {
2204 return get_sb_bdev(fs, flags, dev_name, data,
2205 yaffs2_internal_read_super_mtd, mnt);
2206 }
2207 #else
2208 static struct super_block *yaffs2_read_super(struct file_system_type *fs,
2209 int flags, const char *dev_name,
2210 void *data)
2211 {
2212
2213 return get_sb_bdev(fs, flags, dev_name, data,
2214 yaffs2_internal_read_super_mtd);
2215 }
2216 #endif
2217
2218 static struct file_system_type yaffs2_fs_type = {
2219 .owner = THIS_MODULE,
2220 .name = "yaffs2",
2221 .get_sb = yaffs2_read_super,
2222 .kill_sb = kill_block_super,
2223 .fs_flags = FS_REQUIRES_DEV,
2224 };
2225 #else
2226 static struct super_block *yaffs2_read_super(struct super_block *sb,
2227 void *data, int silent)
2228 {
2229 return yaffs_internal_read_super(2, sb, data, silent);
2230 }
2231
2232 static DECLARE_FSTYPE(yaffs2_fs_type, "yaffs2", yaffs2_read_super,
2233 FS_REQUIRES_DEV);
2234 #endif
2235
2236 #endif /* CONFIG_YAFFS_YAFFS2 */
2237
2238 static struct proc_dir_entry *my_proc_entry;
2239
2240 static char *yaffs_dump_dev(char *buf, yaffs_Device * dev)
2241 {
2242 buf += sprintf(buf, "startBlock......... %d\n", dev->startBlock);
2243 buf += sprintf(buf, "endBlock........... %d\n", dev->endBlock);
2244 buf += sprintf(buf, "totalBytesPerChunk. %d\n", dev->totalBytesPerChunk);
2245 buf += sprintf(buf, "nDataBytesPerChunk. %d\n", dev->nDataBytesPerChunk);
2246 buf += sprintf(buf, "chunkGroupBits..... %d\n", dev->chunkGroupBits);
2247 buf += sprintf(buf, "chunkGroupSize..... %d\n", dev->chunkGroupSize);
2248 buf += sprintf(buf, "nErasedBlocks...... %d\n", dev->nErasedBlocks);
2249 buf += sprintf(buf, "nReservedBlocks.... %d\n", dev->nReservedBlocks);
2250 buf += sprintf(buf, "blocksInCheckpoint. %d\n", dev->blocksInCheckpoint);
2251 buf += sprintf(buf, "nTnodesCreated..... %d\n", dev->nTnodesCreated);
2252 buf += sprintf(buf, "nFreeTnodes........ %d\n", dev->nFreeTnodes);
2253 buf += sprintf(buf, "nObjectsCreated.... %d\n", dev->nObjectsCreated);
2254 buf += sprintf(buf, "nFreeObjects....... %d\n", dev->nFreeObjects);
2255 buf += sprintf(buf, "nFreeChunks........ %d\n", dev->nFreeChunks);
2256 buf += sprintf(buf, "nPageWrites........ %d\n", dev->nPageWrites);
2257 buf += sprintf(buf, "nPageReads......... %d\n", dev->nPageReads);
2258 buf += sprintf(buf, "nBlockErasures..... %d\n", dev->nBlockErasures);
2259 buf += sprintf(buf, "nGCCopies.......... %d\n", dev->nGCCopies);
2260 buf += sprintf(buf, "garbageCollections. %d\n", dev->garbageCollections);
2261 buf += sprintf(buf, "passiveGCs......... %d\n",
2262 dev->passiveGarbageCollections);
2263 buf += sprintf(buf, "nRetriedWrites..... %d\n", dev->nRetriedWrites);
2264 buf += sprintf(buf, "nShortOpCaches..... %d\n", dev->nShortOpCaches);
2265 buf += sprintf(buf, "nRetireBlocks...... %d\n", dev->nRetiredBlocks);
2266 buf += sprintf(buf, "eccFixed........... %d\n", dev->eccFixed);
2267 buf += sprintf(buf, "eccUnfixed......... %d\n", dev->eccUnfixed);
2268 buf += sprintf(buf, "tagsEccFixed....... %d\n", dev->tagsEccFixed);
2269 buf += sprintf(buf, "tagsEccUnfixed..... %d\n", dev->tagsEccUnfixed);
2270 buf += sprintf(buf, "cacheHits.......... %d\n", dev->cacheHits);
2271 buf += sprintf(buf, "nDeletedFiles...... %d\n", dev->nDeletedFiles);
2272 buf += sprintf(buf, "nUnlinkedFiles..... %d\n", dev->nUnlinkedFiles);
2273 buf +=
2274 sprintf(buf, "nBackgroudDeletions %d\n", dev->nBackgroundDeletions);
2275 buf += sprintf(buf, "useNANDECC......... %d\n", dev->useNANDECC);
2276 buf += sprintf(buf, "isYaffs2........... %d\n", dev->isYaffs2);
2277 buf += sprintf(buf, "inbandTags......... %d\n", dev->inbandTags);
2278
2279 return buf;
2280 }
2281
2282 static int yaffs_proc_read(char *page,
2283 char **start,
2284 off_t offset, int count, int *eof, void *data)
2285 {
2286 struct ylist_head *item;
2287 char *buf = page;
2288 int step = offset;
2289 int n = 0;
2290
2291 /* Get proc_file_read() to step 'offset' by one on each sucessive call.
2292 * We use 'offset' (*ppos) to indicate where we are in devList.
2293 * This also assumes the user has posted a read buffer large
2294 * enough to hold the complete output; but that's life in /proc.
2295 */
2296
2297 *(int *)start = 1;
2298
2299 /* Print header first */
2300 if (step == 0) {
2301 buf += sprintf(buf, "YAFFS built:" __DATE__ " " __TIME__
2302 "\n%s\n%s\n", yaffs_fs_c_version,
2303 yaffs_guts_c_version);
2304 }
2305
2306 /* hold lock_kernel while traversing yaffs_dev_list */
2307 lock_kernel();
2308
2309 /* Locate and print the Nth entry. Order N-squared but N is small. */
2310 ylist_for_each(item, &yaffs_dev_list) {
2311 yaffs_Device *dev = ylist_entry(item, yaffs_Device, devList);
2312 if (n < step) {
2313 n++;
2314 continue;
2315 }
2316 buf += sprintf(buf, "\nDevice %d \"%s\"\n", n, dev->name);
2317 buf = yaffs_dump_dev(buf, dev);
2318 break;
2319 }
2320 unlock_kernel();
2321
2322 return buf - page < count ? buf - page : count;
2323 }
2324
2325 /**
2326 * Set the verbosity of the warnings and error messages.
2327 *
2328 * Note that the names can only be a..z or _ with the current code.
2329 */
2330
2331 static struct {
2332 char *mask_name;
2333 unsigned mask_bitfield;
2334 } mask_flags[] = {
2335 {"allocate", YAFFS_TRACE_ALLOCATE},
2336 {"always", YAFFS_TRACE_ALWAYS},
2337 {"bad_blocks", YAFFS_TRACE_BAD_BLOCKS},
2338 {"buffers", YAFFS_TRACE_BUFFERS},
2339 {"bug", YAFFS_TRACE_BUG},
2340 {"checkpt", YAFFS_TRACE_CHECKPOINT},
2341 {"deletion", YAFFS_TRACE_DELETION},
2342 {"erase", YAFFS_TRACE_ERASE},
2343 {"error", YAFFS_TRACE_ERROR},
2344 {"gc_detail", YAFFS_TRACE_GC_DETAIL},
2345 {"gc", YAFFS_TRACE_GC},
2346 {"mtd", YAFFS_TRACE_MTD},
2347 {"nandaccess", YAFFS_TRACE_NANDACCESS},
2348 {"os", YAFFS_TRACE_OS},
2349 {"scan_debug", YAFFS_TRACE_SCAN_DEBUG},
2350 {"scan", YAFFS_TRACE_SCAN},
2351 {"tracing", YAFFS_TRACE_TRACING},
2352
2353 {"verify", YAFFS_TRACE_VERIFY},
2354 {"verify_nand", YAFFS_TRACE_VERIFY_NAND},
2355 {"verify_full", YAFFS_TRACE_VERIFY_FULL},
2356 {"verify_all", YAFFS_TRACE_VERIFY_ALL},
2357
2358 {"write", YAFFS_TRACE_WRITE},
2359 {"all", 0xffffffff},
2360 {"none", 0},
2361 {NULL, 0},
2362 };
2363
2364 #define MAX_MASK_NAME_LENGTH 40
2365 static int yaffs_proc_write(struct file *file, const char *buf,
2366 unsigned long count, void *data)
2367 {
2368 unsigned rg = 0, mask_bitfield;
2369 char *end;
2370 char *mask_name;
2371 const char *x;
2372 char substring[MAX_MASK_NAME_LENGTH + 1];
2373 int i;
2374 int done = 0;
2375 int add, len = 0;
2376 int pos = 0;
2377
2378 rg = yaffs_traceMask;
2379
2380 while (!done && (pos < count)) {
2381 done = 1;
2382 while ((pos < count) && isspace(buf[pos]))
2383 pos++;
2384
2385 switch (buf[pos]) {
2386 case '+':
2387 case '-':
2388 case '=':
2389 add = buf[pos];
2390 pos++;
2391 break;
2392
2393 default:
2394 add = ' ';
2395 break;
2396 }
2397 mask_name = NULL;
2398
2399 mask_bitfield = simple_strtoul(buf + pos, &end, 0);
2400
2401 if (end > buf + pos) {
2402 mask_name = "numeral";
2403 len = end - (buf + pos);
2404 pos += len;
2405 done = 0;
2406 } else {
2407 for (x = buf + pos, i = 0;
2408 (*x == '_' || (*x >= 'a' && *x <= 'z')) &&
2409 i < MAX_MASK_NAME_LENGTH; x++, i++, pos++)
2410 substring[i] = *x;
2411 substring[i] = '\0';
2412
2413 for (i = 0; mask_flags[i].mask_name != NULL; i++) {
2414 if (strcmp(substring, mask_flags[i].mask_name) == 0) {
2415 mask_name = mask_flags[i].mask_name;
2416 mask_bitfield = mask_flags[i].mask_bitfield;
2417 done = 0;
2418 break;
2419 }
2420 }
2421 }
2422
2423 if (mask_name != NULL) {
2424 done = 0;
2425 switch (add) {
2426 case '-':
2427 rg &= ~mask_bitfield;
2428 break;
2429 case '+':
2430 rg |= mask_bitfield;
2431 break;
2432 case '=':
2433 rg = mask_bitfield;
2434 break;
2435 default:
2436 rg |= mask_bitfield;
2437 break;
2438 }
2439 }
2440 }
2441
2442 yaffs_traceMask = rg | YAFFS_TRACE_ALWAYS;
2443
2444 printk(KERN_DEBUG "new trace = 0x%08X\n", yaffs_traceMask);
2445
2446 if (rg & YAFFS_TRACE_ALWAYS) {
2447 for (i = 0; mask_flags[i].mask_name != NULL; i++) {
2448 char flag;
2449 flag = ((rg & mask_flags[i].mask_bitfield) == mask_flags[i].mask_bitfield) ? '+' : '-';
2450 printk(KERN_DEBUG "%c%s\n", flag, mask_flags[i].mask_name);
2451 }
2452 }
2453
2454 return count;
2455 }
2456
2457 /* Stuff to handle installation of file systems */
2458 struct file_system_to_install {
2459 struct file_system_type *fst;
2460 int installed;
2461 };
2462
2463 static struct file_system_to_install fs_to_install[] = {
2464 {&yaffs_fs_type, 0},
2465 {&yaffs2_fs_type, 0},
2466 {NULL, 0}
2467 };
2468
2469 static int __init init_yaffs_fs(void)
2470 {
2471 int error = 0;
2472 struct file_system_to_install *fsinst;
2473
2474 T(YAFFS_TRACE_ALWAYS,
2475 ("yaffs " __DATE__ " " __TIME__ " Installing. \n"));
2476
2477 /* Install the proc_fs entry */
2478 my_proc_entry = create_proc_entry("yaffs",
2479 S_IRUGO | S_IFREG,
2480 YPROC_ROOT);
2481
2482 if (my_proc_entry) {
2483 my_proc_entry->write_proc = yaffs_proc_write;
2484 my_proc_entry->read_proc = yaffs_proc_read;
2485 my_proc_entry->data = NULL;
2486 } else
2487 return -ENOMEM;
2488
2489 /* Now add the file system entries */
2490
2491 fsinst = fs_to_install;
2492
2493 while (fsinst->fst && !error) {
2494 error = register_filesystem(fsinst->fst);
2495 if (!error)
2496 fsinst->installed = 1;
2497 fsinst++;
2498 }
2499
2500 /* Any errors? uninstall */
2501 if (error) {
2502 fsinst = fs_to_install;
2503
2504 while (fsinst->fst) {
2505 if (fsinst->installed) {
2506 unregister_filesystem(fsinst->fst);
2507 fsinst->installed = 0;
2508 }
2509 fsinst++;
2510 }
2511 }
2512
2513 return error;
2514 }
2515
2516 static void __exit exit_yaffs_fs(void)
2517 {
2518
2519 struct file_system_to_install *fsinst;
2520
2521 T(YAFFS_TRACE_ALWAYS, ("yaffs " __DATE__ " " __TIME__
2522 " removing. \n"));
2523
2524 remove_proc_entry("yaffs", YPROC_ROOT);
2525
2526 fsinst = fs_to_install;
2527
2528 while (fsinst->fst) {
2529 if (fsinst->installed) {
2530 unregister_filesystem(fsinst->fst);
2531 fsinst->installed = 0;
2532 }
2533 fsinst++;
2534 }
2535 }
2536
2537 module_init(init_yaffs_fs)
2538 module_exit(exit_yaffs_fs)
2539
2540 MODULE_DESCRIPTION("YAFFS2 - a NAND specific flash file system");
2541 MODULE_AUTHOR("Charles Manning, Aleph One Ltd., 2002-2006");
2542 MODULE_LICENSE("GPL");
2543