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[openwrt/svn-archive/archive.git] / target / linux / generic-2.6 / files / fs / yaffs2 / yaffs_fs.c
1 /*
2 * YAFFS: Yet Another Flash File System. A NAND-flash specific file system.
3 *
4 * Copyright (C) 2002-2007 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/list.h>
47 #include <linux/fs.h>
48 #include <linux/proc_fs.h>
49 #include <linux/smp_lock.h>
50 #include <linux/pagemap.h>
51 #include <linux/mtd/mtd.h>
52 #include <linux/interrupt.h>
53 #include <linux/string.h>
54 #include <linux/ctype.h>
55
56 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2,5,0))
57
58 #include <linux/statfs.h> /* Added NCB 15-8-2003 */
59 #include <asm/statfs.h>
60 #define UnlockPage(p) unlock_page(p)
61 #define Page_Uptodate(page) test_bit(PG_uptodate, &(page)->flags)
62
63 /* FIXME: use sb->s_id instead ? */
64 #define yaffs_devname(sb, buf) bdevname(sb->s_bdev, buf)
65
66 #else
67
68 #include <linux/locks.h>
69 #define BDEVNAME_SIZE 0
70 #define yaffs_devname(sb, buf) kdevname(sb->s_dev)
71
72 #if (LINUX_VERSION_CODE < KERNEL_VERSION(2,5,0))
73 /* added NCB 26/5/2006 for 2.4.25-vrs2-tcl1 kernel */
74 #define __user
75 #endif
76
77 #endif
78
79 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2,6,17))
80 #define WRITE_SIZE_STR "writesize"
81 #define WRITE_SIZE(mtd) (mtd)->writesize
82 #else
83 #define WRITE_SIZE_STR "oobblock"
84 #define WRITE_SIZE(mtd) (mtd)->oobblock
85 #endif
86
87 #include <asm/uaccess.h>
88
89 #include "yportenv.h"
90 #include "yaffs_guts.h"
91
92 #include <linux/mtd/mtd.h>
93 #include "yaffs_mtdif.h"
94 #include "yaffs_mtdif1.h"
95 #include "yaffs_mtdif2.h"
96
97 unsigned int yaffs_traceMask = YAFFS_TRACE_BAD_BLOCKS;
98 unsigned int yaffs_wr_attempts = YAFFS_WR_ATTEMPTS;
99
100 /* Module Parameters */
101 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2,5,0))
102 module_param(yaffs_traceMask,uint,0644);
103 module_param(yaffs_wr_attempts,uint,0644);
104 #else
105 MODULE_PARM(yaffs_traceMask,"i");
106 MODULE_PARM(yaffs_wr_attempts,"i");
107 #endif
108
109 /*#define T(x) printk x */
110
111 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2,6,18))
112 #define yaffs_InodeToObjectLV(iptr) (iptr)->i_private
113 #else
114 #define yaffs_InodeToObjectLV(iptr) (iptr)->u.generic_ip
115 #endif
116
117 #define yaffs_InodeToObject(iptr) ((yaffs_Object *)(yaffs_InodeToObjectLV(iptr)))
118 #define yaffs_DentryToObject(dptr) yaffs_InodeToObject((dptr)->d_inode)
119
120 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2,5,0))
121 #define yaffs_SuperToDevice(sb) ((yaffs_Device *)sb->s_fs_info)
122 #else
123 #define yaffs_SuperToDevice(sb) ((yaffs_Device *)sb->u.generic_sbp)
124 #endif
125
126 static void yaffs_put_super(struct super_block *sb);
127
128 static ssize_t yaffs_file_write(struct file *f, const char *buf, size_t n,
129 loff_t * pos);
130
131 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2,6,17))
132 static int yaffs_file_flush(struct file *file, fl_owner_t id);
133 #else
134 static int yaffs_file_flush(struct file *file);
135 #endif
136
137 static int yaffs_sync_object(struct file *file, struct dentry *dentry,
138 int datasync);
139
140 static int yaffs_readdir(struct file *f, void *dirent, filldir_t filldir);
141
142 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2,5,0))
143 static int yaffs_create(struct inode *dir, struct dentry *dentry, int mode,
144 struct nameidata *n);
145 static struct dentry *yaffs_lookup(struct inode *dir, struct dentry *dentry,
146 struct nameidata *n);
147 #else
148 static int yaffs_create(struct inode *dir, struct dentry *dentry, int mode);
149 static struct dentry *yaffs_lookup(struct inode *dir, struct dentry *dentry);
150 #endif
151 static int yaffs_link(struct dentry *old_dentry, struct inode *dir,
152 struct dentry *dentry);
153 static int yaffs_unlink(struct inode *dir, struct dentry *dentry);
154 static int yaffs_symlink(struct inode *dir, struct dentry *dentry,
155 const char *symname);
156 static int yaffs_mkdir(struct inode *dir, struct dentry *dentry, int mode);
157
158 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2,5,0))
159 static int yaffs_mknod(struct inode *dir, struct dentry *dentry, int mode,
160 dev_t dev);
161 #else
162 static int yaffs_mknod(struct inode *dir, struct dentry *dentry, int mode,
163 int dev);
164 #endif
165 static int yaffs_rename(struct inode *old_dir, struct dentry *old_dentry,
166 struct inode *new_dir, struct dentry *new_dentry);
167 static int yaffs_setattr(struct dentry *dentry, struct iattr *attr);
168
169 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2,6,17))
170 static int yaffs_sync_fs(struct super_block *sb, int wait);
171 static void yaffs_write_super(struct super_block *sb);
172 #else
173 static int yaffs_sync_fs(struct super_block *sb);
174 static int yaffs_write_super(struct super_block *sb);
175 #endif
176
177 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2,6,17))
178 static int yaffs_statfs(struct dentry *dentry, struct kstatfs *buf);
179 #elif (LINUX_VERSION_CODE > KERNEL_VERSION(2,5,0))
180 static int yaffs_statfs(struct super_block *sb, struct kstatfs *buf);
181 #else
182 static int yaffs_statfs(struct super_block *sb, struct statfs *buf);
183 #endif
184 static void yaffs_read_inode(struct inode *inode);
185
186 static void yaffs_put_inode(struct inode *inode);
187 static void yaffs_delete_inode(struct inode *);
188 static void yaffs_clear_inode(struct inode *);
189
190 static int yaffs_readpage(struct file *file, struct page *page);
191 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2,5,0))
192 static int yaffs_writepage(struct page *page, struct writeback_control *wbc);
193 #else
194 static int yaffs_writepage(struct page *page);
195 #endif
196 static int yaffs_prepare_write(struct file *f, struct page *pg,
197 unsigned offset, unsigned to);
198 static int yaffs_commit_write(struct file *f, struct page *pg, unsigned offset,
199 unsigned to);
200
201 static int yaffs_readlink(struct dentry *dentry, char __user * buffer,
202 int buflen);
203 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2,6,13))
204 static void *yaffs_follow_link(struct dentry *dentry, struct nameidata *nd);
205 #else
206 static int yaffs_follow_link(struct dentry *dentry, struct nameidata *nd);
207 #endif
208
209 static struct address_space_operations yaffs_file_address_operations = {
210 .readpage = yaffs_readpage,
211 .writepage = yaffs_writepage,
212 .prepare_write = yaffs_prepare_write,
213 .commit_write = yaffs_commit_write,
214 };
215
216 static struct file_operations yaffs_file_operations = {
217 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2,6,18))
218 .read = do_sync_read,
219 .write = do_sync_write,
220 .aio_read = generic_file_aio_read,
221 .aio_write = generic_file_aio_write,
222 #else
223 .read = generic_file_read,
224 .write = generic_file_write,
225 #endif
226 .mmap = generic_file_mmap,
227 .flush = yaffs_file_flush,
228 .fsync = yaffs_sync_object,
229 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2,5,0))
230 .sendfile = generic_file_sendfile,
231 #endif
232
233 };
234
235 static struct inode_operations yaffs_file_inode_operations = {
236 .setattr = yaffs_setattr,
237 };
238
239 static struct inode_operations yaffs_symlink_inode_operations = {
240 .readlink = yaffs_readlink,
241 .follow_link = yaffs_follow_link,
242 .setattr = yaffs_setattr,
243 };
244
245 static struct inode_operations yaffs_dir_inode_operations = {
246 .create = yaffs_create,
247 .lookup = yaffs_lookup,
248 .link = yaffs_link,
249 .unlink = yaffs_unlink,
250 .symlink = yaffs_symlink,
251 .mkdir = yaffs_mkdir,
252 .rmdir = yaffs_unlink,
253 .mknod = yaffs_mknod,
254 .rename = yaffs_rename,
255 .setattr = yaffs_setattr,
256 };
257
258 static struct file_operations yaffs_dir_operations = {
259 .read = generic_read_dir,
260 .readdir = yaffs_readdir,
261 .fsync = yaffs_sync_object,
262 };
263
264 static struct super_operations yaffs_super_ops = {
265 .statfs = yaffs_statfs,
266 .read_inode = yaffs_read_inode,
267 .put_inode = yaffs_put_inode,
268 .put_super = yaffs_put_super,
269 .delete_inode = yaffs_delete_inode,
270 .clear_inode = yaffs_clear_inode,
271 .sync_fs = yaffs_sync_fs,
272 .write_super = yaffs_write_super,
273 };
274
275 static void yaffs_GrossLock(yaffs_Device * dev)
276 {
277 T(YAFFS_TRACE_OS, (KERN_DEBUG "yaffs locking\n"));
278
279 down(&dev->grossLock);
280 }
281
282 static void yaffs_GrossUnlock(yaffs_Device * dev)
283 {
284 T(YAFFS_TRACE_OS, (KERN_DEBUG "yaffs unlocking\n"));
285 up(&dev->grossLock);
286
287 }
288
289 static int yaffs_readlink(struct dentry *dentry, char __user * buffer,
290 int buflen)
291 {
292 unsigned char *alias;
293 int ret;
294
295 yaffs_Device *dev = yaffs_DentryToObject(dentry)->myDev;
296
297 yaffs_GrossLock(dev);
298
299 alias = yaffs_GetSymlinkAlias(yaffs_DentryToObject(dentry));
300
301 yaffs_GrossUnlock(dev);
302
303 if (!alias)
304 return -ENOMEM;
305
306 ret = vfs_readlink(dentry, buffer, buflen, alias);
307 kfree(alias);
308 return ret;
309 }
310
311 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2,6,13))
312 static void *yaffs_follow_link(struct dentry *dentry, struct nameidata *nd)
313 #else
314 static int yaffs_follow_link(struct dentry *dentry, struct nameidata *nd)
315 #endif
316 {
317 unsigned char *alias;
318 int ret;
319 yaffs_Device *dev = yaffs_DentryToObject(dentry)->myDev;
320
321 yaffs_GrossLock(dev);
322
323 alias = yaffs_GetSymlinkAlias(yaffs_DentryToObject(dentry));
324
325 yaffs_GrossUnlock(dev);
326
327 if (!alias)
328 {
329 ret = -ENOMEM;
330 goto out;
331 }
332
333 ret = vfs_follow_link(nd, alias);
334 kfree(alias);
335 out:
336 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2,6,13))
337 return ERR_PTR (ret);
338 #else
339 return ret;
340 #endif
341 }
342
343 struct inode *yaffs_get_inode(struct super_block *sb, int mode, int dev,
344 yaffs_Object * obj);
345
346 /*
347 * Lookup is used to find objects in the fs
348 */
349 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2,5,0))
350
351 static struct dentry *yaffs_lookup(struct inode *dir, struct dentry *dentry,
352 struct nameidata *n)
353 #else
354 static struct dentry *yaffs_lookup(struct inode *dir, struct dentry *dentry)
355 #endif
356 {
357 yaffs_Object *obj;
358 struct inode *inode = NULL; /* NCB 2.5/2.6 needs NULL here */
359
360 yaffs_Device *dev = yaffs_InodeToObject(dir)->myDev;
361
362 yaffs_GrossLock(dev);
363
364 T(YAFFS_TRACE_OS,
365 (KERN_DEBUG "yaffs_lookup for %d:%s\n",
366 yaffs_InodeToObject(dir)->objectId, dentry->d_name.name));
367
368 obj =
369 yaffs_FindObjectByName(yaffs_InodeToObject(dir),
370 dentry->d_name.name);
371
372 obj = yaffs_GetEquivalentObject(obj); /* in case it was a hardlink */
373
374 /* Can't hold gross lock when calling yaffs_get_inode() */
375 yaffs_GrossUnlock(dev);
376
377 if (obj) {
378 T(YAFFS_TRACE_OS,
379 (KERN_DEBUG "yaffs_lookup found %d\n", obj->objectId));
380
381 inode = yaffs_get_inode(dir->i_sb, obj->yst_mode, 0, obj);
382
383 if (inode) {
384 T(YAFFS_TRACE_OS,
385 (KERN_DEBUG "yaffs_loookup dentry \n"));
386 /* #if 0 asserted by NCB for 2.5/6 compatability - falls through to
387 * d_add even if NULL inode */
388 #if 0
389 /*dget(dentry); // try to solve directory bug */
390 d_add(dentry, inode);
391
392 /* return dentry; */
393 return NULL;
394 #endif
395 }
396
397 } else {
398 T(YAFFS_TRACE_OS, (KERN_DEBUG "yaffs_lookup not found\n"));
399
400 }
401
402 /* added NCB for 2.5/6 compatability - forces add even if inode is
403 * NULL which creates dentry hash */
404 d_add(dentry, inode);
405
406 return NULL;
407 /* return (ERR_PTR(-EIO)); */
408
409 }
410
411 /* For now put inode is just for debugging
412 * Put inode is called when the inode **structure** is put.
413 */
414 static void yaffs_put_inode(struct inode *inode)
415 {
416 T(YAFFS_TRACE_OS,
417 ("yaffs_put_inode: ino %d, count %d\n", (int)inode->i_ino,
418 atomic_read(&inode->i_count)));
419
420 }
421
422 /* clear is called to tell the fs to release any per-inode data it holds */
423 static void yaffs_clear_inode(struct inode *inode)
424 {
425 yaffs_Object *obj;
426 yaffs_Device *dev;
427
428 obj = yaffs_InodeToObject(inode);
429
430 T(YAFFS_TRACE_OS,
431 ("yaffs_clear_inode: ino %d, count %d %s\n", (int)inode->i_ino,
432 atomic_read(&inode->i_count),
433 obj ? "object exists" : "null object"));
434
435 if (obj) {
436 dev = obj->myDev;
437 yaffs_GrossLock(dev);
438
439 /* Clear the association between the inode and
440 * the yaffs_Object.
441 */
442 obj->myInode = NULL;
443 yaffs_InodeToObjectLV(inode) = NULL;
444
445 /* If the object freeing was deferred, then the real
446 * free happens now.
447 * This should fix the inode inconsistency problem.
448 */
449
450 yaffs_HandleDeferedFree(obj);
451
452 yaffs_GrossUnlock(dev);
453 }
454
455 }
456
457 /* delete is called when the link count is zero and the inode
458 * is put (ie. nobody wants to know about it anymore, time to
459 * delete the file).
460 * NB Must call clear_inode()
461 */
462 static void yaffs_delete_inode(struct inode *inode)
463 {
464 yaffs_Object *obj = yaffs_InodeToObject(inode);
465 yaffs_Device *dev;
466
467 T(YAFFS_TRACE_OS,
468 ("yaffs_delete_inode: ino %d, count %d %s\n", (int)inode->i_ino,
469 atomic_read(&inode->i_count),
470 obj ? "object exists" : "null object"));
471
472 if (obj) {
473 dev = obj->myDev;
474 yaffs_GrossLock(dev);
475 yaffs_DeleteFile(obj);
476 yaffs_GrossUnlock(dev);
477 }
478 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2,6,13))
479 truncate_inode_pages (&inode->i_data, 0);
480 #endif
481 clear_inode(inode);
482 }
483
484 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2,6,17))
485 static int yaffs_file_flush(struct file *file, fl_owner_t id)
486 #else
487 static int yaffs_file_flush(struct file *file)
488 #endif
489 {
490 yaffs_Object *obj = yaffs_DentryToObject(file->f_dentry);
491
492 yaffs_Device *dev = obj->myDev;
493
494 T(YAFFS_TRACE_OS,
495 (KERN_DEBUG "yaffs_file_flush object %d (%s)\n", obj->objectId,
496 obj->dirty ? "dirty" : "clean"));
497
498 yaffs_GrossLock(dev);
499
500 yaffs_FlushFile(obj, 1);
501
502 yaffs_GrossUnlock(dev);
503
504 return 0;
505 }
506
507 static int yaffs_readpage_nolock(struct file *f, struct page *pg)
508 {
509 /* Lifted from jffs2 */
510
511 yaffs_Object *obj;
512 unsigned char *pg_buf;
513 int ret;
514
515 yaffs_Device *dev;
516
517 T(YAFFS_TRACE_OS, (KERN_DEBUG "yaffs_readpage at %08x, size %08x\n",
518 (unsigned)(pg->index << PAGE_CACHE_SHIFT),
519 (unsigned)PAGE_CACHE_SIZE));
520
521 obj = yaffs_DentryToObject(f->f_dentry);
522
523 dev = obj->myDev;
524
525 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2,5,0))
526 BUG_ON(!PageLocked(pg));
527 #else
528 if (!PageLocked(pg))
529 PAGE_BUG(pg);
530 #endif
531
532 pg_buf = kmap(pg);
533 /* FIXME: Can kmap fail? */
534
535 yaffs_GrossLock(dev);
536
537 ret =
538 yaffs_ReadDataFromFile(obj, pg_buf, pg->index << PAGE_CACHE_SHIFT,
539 PAGE_CACHE_SIZE);
540
541 yaffs_GrossUnlock(dev);
542
543 if (ret >= 0)
544 ret = 0;
545
546 if (ret) {
547 ClearPageUptodate(pg);
548 SetPageError(pg);
549 } else {
550 SetPageUptodate(pg);
551 ClearPageError(pg);
552 }
553
554 flush_dcache_page(pg);
555 kunmap(pg);
556
557 T(YAFFS_TRACE_OS, (KERN_DEBUG "yaffs_readpage done\n"));
558 return ret;
559 }
560
561 static int yaffs_readpage_unlock(struct file *f, struct page *pg)
562 {
563 int ret = yaffs_readpage_nolock(f, pg);
564 UnlockPage(pg);
565 return ret;
566 }
567
568 static int yaffs_readpage(struct file *f, struct page *pg)
569 {
570 return yaffs_readpage_unlock(f, pg);
571 }
572
573 /* writepage inspired by/stolen from smbfs */
574
575 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2,5,0))
576 static int yaffs_writepage(struct page *page, struct writeback_control *wbc)
577 #else
578 static int yaffs_writepage(struct page *page)
579 #endif
580 {
581 struct address_space *mapping = page->mapping;
582 loff_t offset = (loff_t) page->index << PAGE_CACHE_SHIFT;
583 struct inode *inode;
584 unsigned long end_index;
585 char *buffer;
586 yaffs_Object *obj;
587 int nWritten = 0;
588 unsigned nBytes;
589
590 if (!mapping)
591 BUG();
592 inode = mapping->host;
593 if (!inode)
594 BUG();
595
596 if (offset > inode->i_size) {
597 T(YAFFS_TRACE_OS,
598 (KERN_DEBUG
599 "yaffs_writepage at %08x, inode size = %08x!!!\n",
600 (unsigned)(page->index << PAGE_CACHE_SHIFT),
601 (unsigned)inode->i_size));
602 T(YAFFS_TRACE_OS,
603 (KERN_DEBUG " -> don't care!!\n"));
604 unlock_page(page);
605 return 0;
606 }
607
608 end_index = inode->i_size >> PAGE_CACHE_SHIFT;
609
610 /* easy case */
611 if (page->index < end_index) {
612 nBytes = PAGE_CACHE_SIZE;
613 } else {
614 nBytes = inode->i_size & (PAGE_CACHE_SIZE - 1);
615 }
616
617 get_page(page);
618
619 buffer = kmap(page);
620
621 obj = yaffs_InodeToObject(inode);
622 yaffs_GrossLock(obj->myDev);
623
624 T(YAFFS_TRACE_OS,
625 (KERN_DEBUG "yaffs_writepage at %08x, size %08x\n",
626 (unsigned)(page->index << PAGE_CACHE_SHIFT), nBytes));
627 T(YAFFS_TRACE_OS,
628 (KERN_DEBUG "writepag0: obj = %05x, ino = %05x\n",
629 (int)obj->variant.fileVariant.fileSize, (int)inode->i_size));
630
631 nWritten =
632 yaffs_WriteDataToFile(obj, buffer, page->index << PAGE_CACHE_SHIFT,
633 nBytes, 0);
634
635 T(YAFFS_TRACE_OS,
636 (KERN_DEBUG "writepag1: obj = %05x, ino = %05x\n",
637 (int)obj->variant.fileVariant.fileSize, (int)inode->i_size));
638
639 yaffs_GrossUnlock(obj->myDev);
640
641 kunmap(page);
642 SetPageUptodate(page);
643 UnlockPage(page);
644 put_page(page);
645
646 return (nWritten == nBytes) ? 0 : -ENOSPC;
647 }
648
649 static int yaffs_prepare_write(struct file *f, struct page *pg,
650 unsigned offset, unsigned to)
651 {
652
653 T(YAFFS_TRACE_OS, (KERN_DEBUG "yaffs_prepair_write\n"));
654 if (!Page_Uptodate(pg) && (offset || to < PAGE_CACHE_SIZE))
655 return yaffs_readpage_nolock(f, pg);
656
657 return 0;
658
659 }
660
661 static int yaffs_commit_write(struct file *f, struct page *pg, unsigned offset,
662 unsigned to)
663 {
664
665 void *addr = page_address(pg) + offset;
666 loff_t pos = (((loff_t) pg->index) << PAGE_CACHE_SHIFT) + offset;
667 int nBytes = to - offset;
668 int nWritten;
669
670 unsigned spos = pos;
671 unsigned saddr = (unsigned)addr;
672
673 T(YAFFS_TRACE_OS,
674 (KERN_DEBUG "yaffs_commit_write addr %x pos %x nBytes %d\n", saddr,
675 spos, nBytes));
676
677 nWritten = yaffs_file_write(f, addr, nBytes, &pos);
678
679 if (nWritten != nBytes) {
680 T(YAFFS_TRACE_OS,
681 (KERN_DEBUG
682 "yaffs_commit_write not same size nWritten %d nBytes %d\n",
683 nWritten, nBytes));
684 SetPageError(pg);
685 ClearPageUptodate(pg);
686 } else {
687 SetPageUptodate(pg);
688 }
689
690 T(YAFFS_TRACE_OS,
691 (KERN_DEBUG "yaffs_commit_write returning %d\n",
692 nWritten == nBytes ? 0 : nWritten));
693
694 return nWritten == nBytes ? 0 : nWritten;
695
696 }
697
698 static void yaffs_FillInodeFromObject(struct inode *inode, yaffs_Object * obj)
699 {
700 if (inode && obj) {
701
702
703 /* Check mode against the variant type and attempt to repair if broken. */
704 __u32 mode = obj->yst_mode;
705 switch( obj->variantType ){
706 case YAFFS_OBJECT_TYPE_FILE :
707 if( ! S_ISREG(mode) ){
708 obj->yst_mode &= ~S_IFMT;
709 obj->yst_mode |= S_IFREG;
710 }
711
712 break;
713 case YAFFS_OBJECT_TYPE_SYMLINK :
714 if( ! S_ISLNK(mode) ){
715 obj->yst_mode &= ~S_IFMT;
716 obj->yst_mode |= S_IFLNK;
717 }
718
719 break;
720 case YAFFS_OBJECT_TYPE_DIRECTORY :
721 if( ! S_ISDIR(mode) ){
722 obj->yst_mode &= ~S_IFMT;
723 obj->yst_mode |= S_IFDIR;
724 }
725
726 break;
727 case YAFFS_OBJECT_TYPE_UNKNOWN :
728 case YAFFS_OBJECT_TYPE_HARDLINK :
729 case YAFFS_OBJECT_TYPE_SPECIAL :
730 default:
731 /* TODO? */
732 break;
733 }
734
735 inode->i_ino = obj->objectId;
736 inode->i_mode = obj->yst_mode;
737 inode->i_uid = obj->yst_uid;
738 inode->i_gid = obj->yst_gid;
739 #if (LINUX_VERSION_CODE < KERNEL_VERSION(2,6,19))
740 inode->i_blksize = inode->i_sb->s_blocksize;
741 #endif
742 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2,5,0))
743
744 inode->i_rdev = old_decode_dev(obj->yst_rdev);
745 inode->i_atime.tv_sec = (time_t) (obj->yst_atime);
746 inode->i_atime.tv_nsec = 0;
747 inode->i_mtime.tv_sec = (time_t) obj->yst_mtime;
748 inode->i_mtime.tv_nsec = 0;
749 inode->i_ctime.tv_sec = (time_t) obj->yst_ctime;
750 inode->i_ctime.tv_nsec = 0;
751 #else
752 inode->i_rdev = obj->yst_rdev;
753 inode->i_atime = obj->yst_atime;
754 inode->i_mtime = obj->yst_mtime;
755 inode->i_ctime = obj->yst_ctime;
756 #endif
757 inode->i_size = yaffs_GetObjectFileLength(obj);
758 inode->i_blocks = (inode->i_size + 511) >> 9;
759
760 inode->i_nlink = yaffs_GetObjectLinkCount(obj);
761
762 T(YAFFS_TRACE_OS,
763 (KERN_DEBUG
764 "yaffs_FillInode mode %x uid %d gid %d size %d count %d\n",
765 inode->i_mode, inode->i_uid, inode->i_gid,
766 (int)inode->i_size, atomic_read(&inode->i_count)));
767
768 switch (obj->yst_mode & S_IFMT) {
769 default: /* fifo, device or socket */
770 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2,5,0))
771 init_special_inode(inode, obj->yst_mode,
772 old_decode_dev(obj->yst_rdev));
773 #else
774 init_special_inode(inode, obj->yst_mode,
775 (dev_t) (obj->yst_rdev));
776 #endif
777 break;
778 case S_IFREG: /* file */
779 inode->i_op = &yaffs_file_inode_operations;
780 inode->i_fop = &yaffs_file_operations;
781 inode->i_mapping->a_ops =
782 &yaffs_file_address_operations;
783 break;
784 case S_IFDIR: /* directory */
785 inode->i_op = &yaffs_dir_inode_operations;
786 inode->i_fop = &yaffs_dir_operations;
787 break;
788 case S_IFLNK: /* symlink */
789 inode->i_op = &yaffs_symlink_inode_operations;
790 break;
791 }
792
793 yaffs_InodeToObjectLV(inode) = obj;
794
795 obj->myInode = inode;
796
797 } else {
798 T(YAFFS_TRACE_OS,
799 (KERN_DEBUG "yaffs_FileInode invalid parameters\n"));
800 }
801
802 }
803
804 struct inode *yaffs_get_inode(struct super_block *sb, int mode, int dev,
805 yaffs_Object * obj)
806 {
807 struct inode *inode;
808
809 if (!sb) {
810 T(YAFFS_TRACE_OS,
811 (KERN_DEBUG "yaffs_get_inode for NULL super_block!!\n"));
812 return NULL;
813
814 }
815
816 if (!obj) {
817 T(YAFFS_TRACE_OS,
818 (KERN_DEBUG "yaffs_get_inode for NULL object!!\n"));
819 return NULL;
820
821 }
822
823 T(YAFFS_TRACE_OS,
824 (KERN_DEBUG "yaffs_get_inode for object %d\n", obj->objectId));
825
826 inode = iget(sb, obj->objectId);
827
828 /* NB Side effect: iget calls back to yaffs_read_inode(). */
829 /* iget also increments the inode's i_count */
830 /* NB You can't be holding grossLock or deadlock will happen! */
831
832 return inode;
833 }
834
835 static ssize_t yaffs_file_write(struct file *f, const char *buf, size_t n,
836 loff_t * pos)
837 {
838 yaffs_Object *obj;
839 int nWritten, ipos;
840 struct inode *inode;
841 yaffs_Device *dev;
842
843 obj = yaffs_DentryToObject(f->f_dentry);
844
845 dev = obj->myDev;
846
847 yaffs_GrossLock(dev);
848
849 inode = f->f_dentry->d_inode;
850
851 if (!S_ISBLK(inode->i_mode) && f->f_flags & O_APPEND) {
852 ipos = inode->i_size;
853 } else {
854 ipos = *pos;
855 }
856
857 if (!obj) {
858 T(YAFFS_TRACE_OS,
859 (KERN_DEBUG "yaffs_file_write: hey obj is null!\n"));
860 } else {
861 T(YAFFS_TRACE_OS,
862 (KERN_DEBUG
863 "yaffs_file_write about to write writing %d bytes"
864 "to object %d at %d\n",
865 n, obj->objectId, ipos));
866 }
867
868 nWritten = yaffs_WriteDataToFile(obj, buf, ipos, n, 0);
869
870 T(YAFFS_TRACE_OS,
871 (KERN_DEBUG "yaffs_file_write writing %d bytes, %d written at %d\n",
872 n, nWritten, ipos));
873 if (nWritten > 0) {
874 ipos += nWritten;
875 *pos = ipos;
876 if (ipos > inode->i_size) {
877 inode->i_size = ipos;
878 inode->i_blocks = (ipos + 511) >> 9;
879
880 T(YAFFS_TRACE_OS,
881 (KERN_DEBUG
882 "yaffs_file_write size updated to %d bytes, "
883 "%d blocks\n",
884 ipos, (int)(inode->i_blocks)));
885 }
886
887 }
888 yaffs_GrossUnlock(dev);
889 return nWritten == 0 ? -ENOSPC : nWritten;
890 }
891
892 static int yaffs_readdir(struct file *f, void *dirent, filldir_t filldir)
893 {
894 yaffs_Object *obj;
895 yaffs_Device *dev;
896 struct inode *inode = f->f_dentry->d_inode;
897 unsigned long offset, curoffs;
898 struct list_head *i;
899 yaffs_Object *l;
900
901 char name[YAFFS_MAX_NAME_LENGTH + 1];
902
903 obj = yaffs_DentryToObject(f->f_dentry);
904 dev = obj->myDev;
905
906 yaffs_GrossLock(dev);
907
908 offset = f->f_pos;
909
910 T(YAFFS_TRACE_OS, ("yaffs_readdir: starting at %d\n", (int)offset));
911
912 if (offset == 0) {
913 T(YAFFS_TRACE_OS,
914 (KERN_DEBUG "yaffs_readdir: entry . ino %d \n",
915 (int)inode->i_ino));
916 if (filldir(dirent, ".", 1, offset, inode->i_ino, DT_DIR)
917 < 0) {
918 goto out;
919 }
920 offset++;
921 f->f_pos++;
922 }
923 if (offset == 1) {
924 T(YAFFS_TRACE_OS,
925 (KERN_DEBUG "yaffs_readdir: entry .. ino %d \n",
926 (int)f->f_dentry->d_parent->d_inode->i_ino));
927 if (filldir
928 (dirent, "..", 2, offset,
929 f->f_dentry->d_parent->d_inode->i_ino, DT_DIR) < 0) {
930 goto out;
931 }
932 offset++;
933 f->f_pos++;
934 }
935
936 curoffs = 1;
937
938 /* If the directory has changed since the open or last call to
939 readdir, rewind to after the 2 canned entries. */
940
941 if (f->f_version != inode->i_version) {
942 offset = 2;
943 f->f_pos = offset;
944 f->f_version = inode->i_version;
945 }
946
947 list_for_each(i, &obj->variant.directoryVariant.children) {
948 curoffs++;
949 if (curoffs >= offset) {
950 l = list_entry(i, yaffs_Object, siblings);
951
952 yaffs_GetObjectName(l, name,
953 YAFFS_MAX_NAME_LENGTH + 1);
954 T(YAFFS_TRACE_OS,
955 (KERN_DEBUG "yaffs_readdir: %s inode %d\n", name,
956 yaffs_GetObjectInode(l)));
957
958 if (filldir(dirent,
959 name,
960 strlen(name),
961 offset,
962 yaffs_GetObjectInode(l),
963 yaffs_GetObjectType(l))
964 < 0) {
965 goto up_and_out;
966 }
967
968 offset++;
969 f->f_pos++;
970 }
971 }
972
973 up_and_out:
974 out:
975
976 yaffs_GrossUnlock(dev);
977
978 return 0;
979 }
980
981 /*
982 * File creation. Allocate an inode, and we're done..
983 */
984 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2,5,0))
985 static int yaffs_mknod(struct inode *dir, struct dentry *dentry, int mode,
986 dev_t rdev)
987 #else
988 static int yaffs_mknod(struct inode *dir, struct dentry *dentry, int mode,
989 int rdev)
990 #endif
991 {
992 struct inode *inode;
993
994 yaffs_Object *obj = NULL;
995 yaffs_Device *dev;
996
997 yaffs_Object *parent = yaffs_InodeToObject(dir);
998
999 int error = -ENOSPC;
1000 uid_t uid = current->fsuid;
1001 gid_t gid = (dir->i_mode & S_ISGID) ? dir->i_gid : current->fsgid;
1002
1003 if((dir->i_mode & S_ISGID) && S_ISDIR(mode))
1004 mode |= S_ISGID;
1005
1006 if (parent) {
1007 T(YAFFS_TRACE_OS,
1008 (KERN_DEBUG "yaffs_mknod: parent object %d type %d\n",
1009 parent->objectId, parent->variantType));
1010 } else {
1011 T(YAFFS_TRACE_OS,
1012 (KERN_DEBUG "yaffs_mknod: could not get parent object\n"));
1013 return -EPERM;
1014 }
1015
1016 T(YAFFS_TRACE_OS, ("yaffs_mknod: making oject for %s, "
1017 "mode %x dev %x\n",
1018 dentry->d_name.name, mode, rdev));
1019
1020 dev = parent->myDev;
1021
1022 yaffs_GrossLock(dev);
1023
1024 switch (mode & S_IFMT) {
1025 default:
1026 /* Special (socket, fifo, device...) */
1027 T(YAFFS_TRACE_OS, (KERN_DEBUG
1028 "yaffs_mknod: making special\n"));
1029 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2,5,0))
1030 obj =
1031 yaffs_MknodSpecial(parent, dentry->d_name.name, mode, uid,
1032 gid, old_encode_dev(rdev));
1033 #else
1034 obj =
1035 yaffs_MknodSpecial(parent, dentry->d_name.name, mode, uid,
1036 gid, rdev);
1037 #endif
1038 break;
1039 case S_IFREG: /* file */
1040 T(YAFFS_TRACE_OS, (KERN_DEBUG "yaffs_mknod: making file\n"));
1041 obj =
1042 yaffs_MknodFile(parent, dentry->d_name.name, mode, uid,
1043 gid);
1044 break;
1045 case S_IFDIR: /* directory */
1046 T(YAFFS_TRACE_OS,
1047 (KERN_DEBUG "yaffs_mknod: making directory\n"));
1048 obj =
1049 yaffs_MknodDirectory(parent, dentry->d_name.name, mode,
1050 uid, gid);
1051 break;
1052 case S_IFLNK: /* symlink */
1053 T(YAFFS_TRACE_OS, (KERN_DEBUG "yaffs_mknod: making file\n"));
1054 obj = NULL; /* Do we ever get here? */
1055 break;
1056 }
1057
1058 /* Can not call yaffs_get_inode() with gross lock held */
1059 yaffs_GrossUnlock(dev);
1060
1061 if (obj) {
1062 inode = yaffs_get_inode(dir->i_sb, mode, rdev, obj);
1063 d_instantiate(dentry, inode);
1064 T(YAFFS_TRACE_OS,
1065 (KERN_DEBUG "yaffs_mknod created object %d count = %d\n",
1066 obj->objectId, atomic_read(&inode->i_count)));
1067 error = 0;
1068 } else {
1069 T(YAFFS_TRACE_OS,
1070 (KERN_DEBUG "yaffs_mknod failed making object\n"));
1071 error = -ENOMEM;
1072 }
1073
1074 return error;
1075 }
1076
1077 static int yaffs_mkdir(struct inode *dir, struct dentry *dentry, int mode)
1078 {
1079 int retVal;
1080 T(YAFFS_TRACE_OS, (KERN_DEBUG "yaffs_mkdir\n"));
1081 retVal = yaffs_mknod(dir, dentry, mode | S_IFDIR, 0);
1082 #if 0
1083 /* attempt to fix dir bug - didn't work */
1084 if (!retVal) {
1085 dget(dentry);
1086 }
1087 #endif
1088 return retVal;
1089 }
1090
1091 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2,5,0))
1092 static int yaffs_create(struct inode *dir, struct dentry *dentry, int mode,
1093 struct nameidata *n)
1094 #else
1095 static int yaffs_create(struct inode *dir, struct dentry *dentry, int mode)
1096 #endif
1097 {
1098 T(YAFFS_TRACE_OS, (KERN_DEBUG "yaffs_create\n"));
1099 return yaffs_mknod(dir, dentry, mode | S_IFREG, 0);
1100 }
1101
1102 static int yaffs_unlink(struct inode *dir, struct dentry *dentry)
1103 {
1104 int retVal;
1105
1106 yaffs_Device *dev;
1107
1108 T(YAFFS_TRACE_OS,
1109 (KERN_DEBUG "yaffs_unlink %d:%s\n", (int)(dir->i_ino),
1110 dentry->d_name.name));
1111
1112 dev = yaffs_InodeToObject(dir)->myDev;
1113
1114 yaffs_GrossLock(dev);
1115
1116 retVal = yaffs_Unlink(yaffs_InodeToObject(dir), dentry->d_name.name);
1117
1118 if (retVal == YAFFS_OK) {
1119 dentry->d_inode->i_nlink--;
1120 dir->i_version++;
1121 yaffs_GrossUnlock(dev);
1122 mark_inode_dirty(dentry->d_inode);
1123 return 0;
1124 }
1125 yaffs_GrossUnlock(dev);
1126 return -ENOTEMPTY;
1127 }
1128
1129 /*
1130 * Create a link...
1131 */
1132 static int yaffs_link(struct dentry *old_dentry, struct inode *dir,
1133 struct dentry *dentry)
1134 {
1135 struct inode *inode = old_dentry->d_inode;
1136 yaffs_Object *obj = NULL;
1137 yaffs_Object *link = NULL;
1138 yaffs_Device *dev;
1139
1140 T(YAFFS_TRACE_OS, (KERN_DEBUG "yaffs_link\n"));
1141
1142 obj = yaffs_InodeToObject(inode);
1143 dev = obj->myDev;
1144
1145 yaffs_GrossLock(dev);
1146
1147 if (!S_ISDIR(inode->i_mode)) /* Don't link directories */
1148 {
1149 link =
1150 yaffs_Link(yaffs_InodeToObject(dir), dentry->d_name.name,
1151 obj);
1152 }
1153
1154 if (link) {
1155 old_dentry->d_inode->i_nlink = yaffs_GetObjectLinkCount(obj);
1156 d_instantiate(dentry, old_dentry->d_inode);
1157 atomic_inc(&old_dentry->d_inode->i_count);
1158 T(YAFFS_TRACE_OS,
1159 (KERN_DEBUG "yaffs_link link count %d i_count %d\n",
1160 old_dentry->d_inode->i_nlink,
1161 atomic_read(&old_dentry->d_inode->i_count)));
1162
1163 }
1164
1165 yaffs_GrossUnlock(dev);
1166
1167 if (link) {
1168
1169 return 0;
1170 }
1171
1172 return -EPERM;
1173 }
1174
1175 static int yaffs_symlink(struct inode *dir, struct dentry *dentry,
1176 const char *symname)
1177 {
1178 yaffs_Object *obj;
1179 yaffs_Device *dev;
1180 uid_t uid = current->fsuid;
1181 gid_t gid = (dir->i_mode & S_ISGID) ? dir->i_gid : current->fsgid;
1182
1183 T(YAFFS_TRACE_OS, (KERN_DEBUG "yaffs_symlink\n"));
1184
1185 dev = yaffs_InodeToObject(dir)->myDev;
1186 yaffs_GrossLock(dev);
1187 obj = yaffs_MknodSymLink(yaffs_InodeToObject(dir), dentry->d_name.name,
1188 S_IFLNK | S_IRWXUGO, uid, gid, symname);
1189 yaffs_GrossUnlock(dev);
1190
1191 if (obj) {
1192
1193 struct inode *inode;
1194
1195 inode = yaffs_get_inode(dir->i_sb, obj->yst_mode, 0, obj);
1196 d_instantiate(dentry, inode);
1197 T(YAFFS_TRACE_OS, (KERN_DEBUG "symlink created OK\n"));
1198 return 0;
1199 } else {
1200 T(YAFFS_TRACE_OS, (KERN_DEBUG "symlink not created\n"));
1201
1202 }
1203
1204 return -ENOMEM;
1205 }
1206
1207 static int yaffs_sync_object(struct file *file, struct dentry *dentry,
1208 int datasync)
1209 {
1210
1211 yaffs_Object *obj;
1212 yaffs_Device *dev;
1213
1214 obj = yaffs_DentryToObject(dentry);
1215
1216 dev = obj->myDev;
1217
1218 T(YAFFS_TRACE_OS, (KERN_DEBUG "yaffs_sync_object\n"));
1219 yaffs_GrossLock(dev);
1220 yaffs_FlushFile(obj, 1);
1221 yaffs_GrossUnlock(dev);
1222 return 0;
1223 }
1224
1225 /*
1226 * The VFS layer already does all the dentry stuff for rename.
1227 *
1228 * NB: POSIX says you can rename an object over an old object of the same name
1229 */
1230 static int yaffs_rename(struct inode *old_dir, struct dentry *old_dentry,
1231 struct inode *new_dir, struct dentry *new_dentry)
1232 {
1233 yaffs_Device *dev;
1234 int retVal = YAFFS_FAIL;
1235 yaffs_Object *target;
1236
1237 T(YAFFS_TRACE_OS, (KERN_DEBUG "yaffs_rename\n"));
1238 dev = yaffs_InodeToObject(old_dir)->myDev;
1239
1240 yaffs_GrossLock(dev);
1241
1242 /* Check if the target is an existing directory that is not empty. */
1243 target =
1244 yaffs_FindObjectByName(yaffs_InodeToObject(new_dir),
1245 new_dentry->d_name.name);
1246
1247
1248
1249 if (target &&
1250 target->variantType == YAFFS_OBJECT_TYPE_DIRECTORY &&
1251 !list_empty(&target->variant.directoryVariant.children)) {
1252
1253 T(YAFFS_TRACE_OS, (KERN_DEBUG "target is non-empty dir\n"));
1254
1255 retVal = YAFFS_FAIL;
1256 } else {
1257
1258 /* Now does unlinking internally using shadowing mechanism */
1259 T(YAFFS_TRACE_OS, (KERN_DEBUG "calling yaffs_RenameObject\n"));
1260
1261 retVal =
1262 yaffs_RenameObject(yaffs_InodeToObject(old_dir),
1263 old_dentry->d_name.name,
1264 yaffs_InodeToObject(new_dir),
1265 new_dentry->d_name.name);
1266
1267 }
1268 yaffs_GrossUnlock(dev);
1269
1270 if (retVal == YAFFS_OK) {
1271 if(target) {
1272 new_dentry->d_inode->i_nlink--;
1273 mark_inode_dirty(new_dentry->d_inode);
1274 }
1275
1276 return 0;
1277 } else {
1278 return -ENOTEMPTY;
1279 }
1280
1281 }
1282
1283 static int yaffs_setattr(struct dentry *dentry, struct iattr *attr)
1284 {
1285 struct inode *inode = dentry->d_inode;
1286 int error;
1287 yaffs_Device *dev;
1288
1289 T(YAFFS_TRACE_OS,
1290 (KERN_DEBUG "yaffs_setattr of object %d\n",
1291 yaffs_InodeToObject(inode)->objectId));
1292
1293 if ((error = inode_change_ok(inode, attr)) == 0) {
1294
1295 dev = yaffs_InodeToObject(inode)->myDev;
1296 yaffs_GrossLock(dev);
1297 if (yaffs_SetAttributes(yaffs_InodeToObject(inode), attr) ==
1298 YAFFS_OK) {
1299 error = 0;
1300 } else {
1301 error = -EPERM;
1302 }
1303 yaffs_GrossUnlock(dev);
1304 if (!error)
1305 error = inode_setattr(inode, attr);
1306 }
1307 return error;
1308 }
1309
1310 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2,6,17))
1311 static int yaffs_statfs(struct dentry *dentry, struct kstatfs *buf)
1312 {
1313 yaffs_Device *dev = yaffs_DentryToObject(dentry)->myDev;
1314 struct super_block *sb = dentry->d_sb;
1315 #elif (LINUX_VERSION_CODE > KERNEL_VERSION(2,5,0))
1316 static int yaffs_statfs(struct super_block *sb, struct kstatfs *buf)
1317 {
1318 yaffs_Device *dev = yaffs_SuperToDevice(sb);
1319 #else
1320 static int yaffs_statfs(struct super_block *sb, struct statfs *buf)
1321 {
1322 yaffs_Device *dev = yaffs_SuperToDevice(sb);
1323 #endif
1324
1325 T(YAFFS_TRACE_OS, (KERN_DEBUG "yaffs_statfs\n"));
1326
1327 yaffs_GrossLock(dev);
1328
1329 buf->f_type = YAFFS_MAGIC;
1330 buf->f_bsize = sb->s_blocksize;
1331 buf->f_namelen = 255;
1332 if (sb->s_blocksize > dev->nDataBytesPerChunk) {
1333
1334 buf->f_blocks =
1335 (dev->endBlock - dev->startBlock +
1336 1) * dev->nChunksPerBlock / (sb->s_blocksize /
1337 dev->nDataBytesPerChunk);
1338 buf->f_bfree =
1339 yaffs_GetNumberOfFreeChunks(dev) / (sb->s_blocksize /
1340 dev->nDataBytesPerChunk);
1341 } else {
1342
1343 buf->f_blocks =
1344 (dev->endBlock - dev->startBlock +
1345 1) * dev->nChunksPerBlock * (dev->nDataBytesPerChunk /
1346 sb->s_blocksize);
1347 buf->f_bfree =
1348 yaffs_GetNumberOfFreeChunks(dev) * (dev->nDataBytesPerChunk /
1349 sb->s_blocksize);
1350 }
1351 buf->f_files = 0;
1352 buf->f_ffree = 0;
1353 buf->f_bavail = buf->f_bfree;
1354
1355 yaffs_GrossUnlock(dev);
1356 return 0;
1357 }
1358
1359
1360 /**
1361 static int yaffs_do_sync_fs(struct super_block *sb)
1362 {
1363
1364 yaffs_Device *dev = yaffs_SuperToDevice(sb);
1365 T(YAFFS_TRACE_OS, (KERN_DEBUG "yaffs_do_sync_fs\n"));
1366
1367 if(sb->s_dirt) {
1368 yaffs_GrossLock(dev);
1369
1370 if(dev)
1371 yaffs_CheckpointSave(dev);
1372
1373 yaffs_GrossUnlock(dev);
1374
1375 sb->s_dirt = 0;
1376 }
1377 return 0;
1378 }
1379 **/
1380
1381 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2,6,17))
1382 static void yaffs_write_super(struct super_block *sb)
1383 #else
1384 static int yaffs_write_super(struct super_block *sb)
1385 #endif
1386 {
1387
1388 T(YAFFS_TRACE_OS, (KERN_DEBUG "yaffs_write_super\n"));
1389 #if (LINUX_VERSION_CODE < KERNEL_VERSION(2,6,18))
1390 return 0; /* yaffs_do_sync_fs(sb);*/
1391 #endif
1392 }
1393
1394
1395 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2,6,17))
1396 static int yaffs_sync_fs(struct super_block *sb, int wait)
1397 #else
1398 static int yaffs_sync_fs(struct super_block *sb)
1399 #endif
1400 {
1401
1402 T(YAFFS_TRACE_OS, (KERN_DEBUG "yaffs_sync_fs\n"));
1403
1404 return 0; /* yaffs_do_sync_fs(sb);*/
1405
1406 }
1407
1408
1409 static void yaffs_read_inode(struct inode *inode)
1410 {
1411 /* NB This is called as a side effect of other functions, but
1412 * we had to release the lock to prevent deadlocks, so
1413 * need to lock again.
1414 */
1415
1416 yaffs_Object *obj;
1417 yaffs_Device *dev = yaffs_SuperToDevice(inode->i_sb);
1418
1419 T(YAFFS_TRACE_OS,
1420 (KERN_DEBUG "yaffs_read_inode for %d\n", (int)inode->i_ino));
1421
1422 yaffs_GrossLock(dev);
1423
1424 obj = yaffs_FindObjectByNumber(dev, inode->i_ino);
1425
1426 yaffs_FillInodeFromObject(inode, obj);
1427
1428 yaffs_GrossUnlock(dev);
1429 }
1430
1431 static LIST_HEAD(yaffs_dev_list);
1432
1433 static int yaffs_remount_fs(struct super_block *sb, int *flags, char *data)
1434 {
1435 yaffs_Device *dev = yaffs_SuperToDevice(sb);
1436
1437 if( *flags & MS_RDONLY ) {
1438 struct mtd_info *mtd = yaffs_SuperToDevice(sb)->genericDevice;
1439
1440 T(YAFFS_TRACE_OS,
1441 (KERN_DEBUG "yaffs_remount_fs: %s: RO\n", dev->name ));
1442
1443 yaffs_GrossLock(dev);
1444
1445 yaffs_FlushEntireDeviceCache(dev);
1446
1447 yaffs_CheckpointSave(dev);
1448
1449 if (mtd->sync)
1450 mtd->sync(mtd);
1451
1452 yaffs_GrossUnlock(dev);
1453 }
1454 else {
1455 T(YAFFS_TRACE_OS,
1456 (KERN_DEBUG "yaffs_remount_fs: %s: RW\n", dev->name ));
1457 }
1458
1459 return 0;
1460 }
1461
1462 static void yaffs_put_super(struct super_block *sb)
1463 {
1464 yaffs_Device *dev = yaffs_SuperToDevice(sb);
1465
1466 T(YAFFS_TRACE_OS, (KERN_DEBUG "yaffs_put_super\n"));
1467
1468 yaffs_GrossLock(dev);
1469
1470 yaffs_FlushEntireDeviceCache(dev);
1471
1472 yaffs_CheckpointSave(dev);
1473
1474 if (dev->putSuperFunc) {
1475 dev->putSuperFunc(sb);
1476 }
1477
1478 yaffs_Deinitialise(dev);
1479
1480 yaffs_GrossUnlock(dev);
1481
1482 /* we assume this is protected by lock_kernel() in mount/umount */
1483 list_del(&dev->devList);
1484
1485 if(dev->spareBuffer){
1486 YFREE(dev->spareBuffer);
1487 dev->spareBuffer = NULL;
1488 }
1489
1490 kfree(dev);
1491 }
1492
1493
1494 static void yaffs_MTDPutSuper(struct super_block *sb)
1495 {
1496
1497 struct mtd_info *mtd = yaffs_SuperToDevice(sb)->genericDevice;
1498
1499 if (mtd->sync) {
1500 mtd->sync(mtd);
1501 }
1502
1503 put_mtd_device(mtd);
1504 }
1505
1506
1507 static void yaffs_MarkSuperBlockDirty(void *vsb)
1508 {
1509 struct super_block *sb = (struct super_block *)vsb;
1510
1511 T(YAFFS_TRACE_OS, (KERN_DEBUG "yaffs_MarkSuperBlockDirty() sb = %p\n",sb));
1512 // if(sb)
1513 // sb->s_dirt = 1;
1514 }
1515
1516 typedef struct {
1517 int inband_tags;
1518 int skip_checkpoint_read;
1519 int skip_checkpoint_write;
1520 int no_cache;
1521 } yaffs_options;
1522
1523 #define MAX_OPT_LEN 20
1524 static int yaffs_parse_options(yaffs_options *options, const char *options_str)
1525 {
1526 char cur_opt[MAX_OPT_LEN+1];
1527 int p;
1528 int error = 0;
1529
1530 /* Parse through the options which is a comma seperated list */
1531
1532 while(options_str && *options_str && !error){
1533 memset(cur_opt,0,MAX_OPT_LEN+1);
1534 p = 0;
1535
1536 while(*options_str && *options_str != ','){
1537 if(p < MAX_OPT_LEN){
1538 cur_opt[p] = *options_str;
1539 p++;
1540 }
1541 options_str++;
1542 }
1543
1544 if(!strcmp(cur_opt,"inband-tags"))
1545 options->inband_tags = 1;
1546 else if(!strcmp(cur_opt,"no-cache"))
1547 options->no_cache = 1;
1548 else if(!strcmp(cur_opt,"no-checkpoint-read"))
1549 options->skip_checkpoint_read = 1;
1550 else if(!strcmp(cur_opt,"no-checkpoint-write"))
1551 options->skip_checkpoint_write = 1;
1552 else if(!strcmp(cur_opt,"no-checkpoint")){
1553 options->skip_checkpoint_read = 1;
1554 options->skip_checkpoint_write = 1;
1555 } else {
1556 printk(KERN_INFO "yaffs: Bad mount option \"%s\"\n",cur_opt);
1557 error = 1;
1558 }
1559
1560 }
1561
1562 return error;
1563 }
1564
1565 static struct super_block *yaffs_internal_read_super(int yaffsVersion,
1566 struct super_block *sb,
1567 void *data, int silent)
1568 {
1569 int nBlocks;
1570 struct inode *inode = NULL;
1571 struct dentry *root;
1572 yaffs_Device *dev = 0;
1573 char devname_buf[BDEVNAME_SIZE + 1];
1574 struct mtd_info *mtd;
1575 int err;
1576 char *data_str = (char *)data;
1577
1578 yaffs_options options;
1579
1580 sb->s_magic = YAFFS_MAGIC;
1581 sb->s_op = &yaffs_super_ops;
1582
1583 if (!sb)
1584 printk(KERN_INFO "yaffs: sb is NULL\n");
1585 else if (!sb->s_dev)
1586 printk(KERN_INFO "yaffs: sb->s_dev is NULL\n");
1587 else if (!yaffs_devname(sb, devname_buf))
1588 printk(KERN_INFO "yaffs: devname is NULL\n");
1589 else
1590 printk(KERN_INFO "yaffs: dev is %d name is \"%s\"\n",
1591 sb->s_dev,
1592 yaffs_devname(sb, devname_buf));
1593
1594 if(!data_str)
1595 data_str = "";
1596
1597 printk(KERN_INFO "yaffs: passed flags \"%s\"\n",data_str);
1598
1599 memset(&options,0,sizeof(options));
1600
1601 if(yaffs_parse_options(&options,data_str)){
1602 /* Option parsing failed */
1603 return NULL;
1604 }
1605
1606
1607 sb->s_blocksize = PAGE_CACHE_SIZE;
1608 sb->s_blocksize_bits = PAGE_CACHE_SHIFT;
1609 T(YAFFS_TRACE_OS, ("yaffs_read_super: Using yaffs%d\n", yaffsVersion));
1610 T(YAFFS_TRACE_OS,
1611 ("yaffs_read_super: block size %d\n", (int)(sb->s_blocksize)));
1612
1613 #ifdef CONFIG_YAFFS_DISABLE_WRITE_VERIFY
1614 T(YAFFS_TRACE_OS,
1615 ("yaffs: Write verification disabled. All guarantees "
1616 "null and void\n"));
1617 #endif
1618
1619 T(YAFFS_TRACE_ALWAYS, ("yaffs: Attempting MTD mount on %u.%u, "
1620 "\"%s\"\n",
1621 MAJOR(sb->s_dev), MINOR(sb->s_dev),
1622 yaffs_devname(sb, devname_buf)));
1623
1624 /* Check it's an mtd device..... */
1625 if (MAJOR(sb->s_dev) != MTD_BLOCK_MAJOR) {
1626 return NULL; /* This isn't an mtd device */
1627 }
1628 /* Get the device */
1629 mtd = get_mtd_device(NULL, MINOR(sb->s_dev));
1630 if (!mtd) {
1631 T(YAFFS_TRACE_ALWAYS,
1632 ("yaffs: MTD device #%u doesn't appear to exist\n",
1633 MINOR(sb->s_dev)));
1634 return NULL;
1635 }
1636 /* Check it's NAND */
1637 if (mtd->type != MTD_NANDFLASH) {
1638 T(YAFFS_TRACE_ALWAYS,
1639 ("yaffs: MTD device is not NAND it's type %d\n", mtd->type));
1640 return NULL;
1641 }
1642
1643 T(YAFFS_TRACE_OS, (" erase %p\n", mtd->erase));
1644 T(YAFFS_TRACE_OS, (" read %p\n", mtd->read));
1645 T(YAFFS_TRACE_OS, (" write %p\n", mtd->write));
1646 T(YAFFS_TRACE_OS, (" readoob %p\n", mtd->read_oob));
1647 T(YAFFS_TRACE_OS, (" writeoob %p\n", mtd->write_oob));
1648 T(YAFFS_TRACE_OS, (" block_isbad %p\n", mtd->block_isbad));
1649 T(YAFFS_TRACE_OS, (" block_markbad %p\n", mtd->block_markbad));
1650 T(YAFFS_TRACE_OS, (" %s %d\n", WRITE_SIZE_STR, WRITE_SIZE(mtd)));
1651 T(YAFFS_TRACE_OS, (" oobsize %d\n", mtd->oobsize));
1652 T(YAFFS_TRACE_OS, (" erasesize %d\n", mtd->erasesize));
1653 T(YAFFS_TRACE_OS, (" size %d\n", mtd->size));
1654
1655 #ifdef CONFIG_YAFFS_AUTO_YAFFS2
1656
1657 if (yaffsVersion == 1 &&
1658 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2,6,17))
1659 mtd->writesize >= 2048) {
1660 #else
1661 mtd->oobblock >= 2048) {
1662 #endif
1663 T(YAFFS_TRACE_ALWAYS,("yaffs: auto selecting yaffs2\n"));
1664 yaffsVersion = 2;
1665 }
1666
1667 /* Added NCB 26/5/2006 for completeness */
1668 if (yaffsVersion == 2 &&
1669 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2,6,17))
1670 mtd->writesize == 512) {
1671 #else
1672 mtd->oobblock == 512) {
1673 #endif
1674 T(YAFFS_TRACE_ALWAYS,("yaffs: auto selecting yaffs1\n"));
1675 yaffsVersion = 1;
1676 }
1677
1678 #endif
1679
1680 if (yaffsVersion == 2) {
1681 /* Check for version 2 style functions */
1682 if (!mtd->erase ||
1683 !mtd->block_isbad ||
1684 !mtd->block_markbad ||
1685 !mtd->read ||
1686 !mtd->write ||
1687 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2,6,17))
1688 !mtd->read_oob || !mtd->write_oob) {
1689 #else
1690 !mtd->write_ecc ||
1691 !mtd->read_ecc || !mtd->read_oob || !mtd->write_oob) {
1692 #endif
1693 T(YAFFS_TRACE_ALWAYS,
1694 ("yaffs: MTD device does not support required "
1695 "functions\n"));;
1696 return NULL;
1697 }
1698
1699 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2,6,17))
1700 if (mtd->writesize < YAFFS_MIN_YAFFS2_CHUNK_SIZE ||
1701 #else
1702 if (mtd->oobblock < YAFFS_MIN_YAFFS2_CHUNK_SIZE ||
1703 #endif
1704 mtd->oobsize < YAFFS_MIN_YAFFS2_SPARE_SIZE) {
1705 T(YAFFS_TRACE_ALWAYS,
1706 ("yaffs: MTD device does not have the "
1707 "right page sizes\n"));
1708 return NULL;
1709 }
1710 } else {
1711 /* Check for V1 style functions */
1712 if (!mtd->erase ||
1713 !mtd->read ||
1714 !mtd->write ||
1715 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2,6,17))
1716 !mtd->read_oob || !mtd->write_oob) {
1717 #else
1718 !mtd->write_ecc ||
1719 !mtd->read_ecc || !mtd->read_oob || !mtd->write_oob) {
1720 #endif
1721 T(YAFFS_TRACE_ALWAYS,
1722 ("yaffs: MTD device does not support required "
1723 "functions\n"));;
1724 return NULL;
1725 }
1726
1727 if (WRITE_SIZE(mtd) < YAFFS_BYTES_PER_CHUNK ||
1728 mtd->oobsize != YAFFS_BYTES_PER_SPARE) {
1729 T(YAFFS_TRACE_ALWAYS,
1730 ("yaffs: MTD device does not support have the "
1731 "right page sizes\n"));
1732 return NULL;
1733 }
1734 }
1735
1736 /* OK, so if we got here, we have an MTD that's NAND and looks
1737 * like it has the right capabilities
1738 * Set the yaffs_Device up for mtd
1739 */
1740
1741 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2,5,0))
1742 sb->s_fs_info = dev = kmalloc(sizeof(yaffs_Device), GFP_KERNEL);
1743 #else
1744 sb->u.generic_sbp = dev = kmalloc(sizeof(yaffs_Device), GFP_KERNEL);
1745 #endif
1746 if (!dev) {
1747 /* Deep shit could not allocate device structure */
1748 T(YAFFS_TRACE_ALWAYS,
1749 ("yaffs_read_super: Failed trying to allocate "
1750 "yaffs_Device. \n"));
1751 return NULL;
1752 }
1753
1754 memset(dev, 0, sizeof(yaffs_Device));
1755 dev->genericDevice = mtd;
1756 dev->name = mtd->name;
1757
1758 /* Set up the memory size parameters.... */
1759
1760 nBlocks = mtd->size / (YAFFS_CHUNKS_PER_BLOCK * YAFFS_BYTES_PER_CHUNK);
1761 dev->startBlock = 0;
1762 dev->endBlock = nBlocks - 1;
1763 dev->nChunksPerBlock = YAFFS_CHUNKS_PER_BLOCK;
1764 dev->nDataBytesPerChunk = YAFFS_BYTES_PER_CHUNK;
1765 dev->nReservedBlocks = 5;
1766 dev->nShortOpCaches = (options.no_cache) ? 0 : 10;
1767
1768 /* ... and the functions. */
1769 if (yaffsVersion == 2) {
1770 dev->writeChunkWithTagsToNAND =
1771 nandmtd2_WriteChunkWithTagsToNAND;
1772 dev->readChunkWithTagsFromNAND =
1773 nandmtd2_ReadChunkWithTagsFromNAND;
1774 dev->markNANDBlockBad = nandmtd2_MarkNANDBlockBad;
1775 dev->queryNANDBlock = nandmtd2_QueryNANDBlock;
1776 dev->spareBuffer = YMALLOC(mtd->oobsize);
1777 dev->isYaffs2 = 1;
1778 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2,6,17))
1779 dev->nDataBytesPerChunk = mtd->writesize;
1780 dev->nChunksPerBlock = mtd->erasesize / mtd->writesize;
1781 #else
1782 dev->nDataBytesPerChunk = mtd->oobblock;
1783 dev->nChunksPerBlock = mtd->erasesize / mtd->oobblock;
1784 #endif
1785 nBlocks = mtd->size / mtd->erasesize;
1786
1787 dev->nCheckpointReservedBlocks = CONFIG_YAFFS_CHECKPOINT_RESERVED_BLOCKS;
1788 dev->startBlock = 0;
1789 dev->endBlock = nBlocks - 1;
1790 } else {
1791 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2,6,17))
1792 /* use the MTD interface in yaffs_mtdif1.c */
1793 dev->writeChunkWithTagsToNAND =
1794 nandmtd1_WriteChunkWithTagsToNAND;
1795 dev->readChunkWithTagsFromNAND =
1796 nandmtd1_ReadChunkWithTagsFromNAND;
1797 dev->markNANDBlockBad = nandmtd1_MarkNANDBlockBad;
1798 dev->queryNANDBlock = nandmtd1_QueryNANDBlock;
1799 #else
1800 dev->writeChunkToNAND = nandmtd_WriteChunkToNAND;
1801 dev->readChunkFromNAND = nandmtd_ReadChunkFromNAND;
1802 #endif
1803 dev->isYaffs2 = 0;
1804 }
1805 /* ... and common functions */
1806 dev->eraseBlockInNAND = nandmtd_EraseBlockInNAND;
1807 dev->initialiseNAND = nandmtd_InitialiseNAND;
1808
1809 dev->putSuperFunc = yaffs_MTDPutSuper;
1810
1811 dev->superBlock = (void *)sb;
1812 dev->markSuperBlockDirty = yaffs_MarkSuperBlockDirty;
1813
1814
1815 #ifndef CONFIG_YAFFS_DOES_ECC
1816 dev->useNANDECC = 1;
1817 #endif
1818
1819 #ifdef CONFIG_YAFFS_DISABLE_WIDE_TNODES
1820 dev->wideTnodesDisabled = 1;
1821 #endif
1822
1823 dev->skipCheckpointRead = options.skip_checkpoint_read;
1824 dev->skipCheckpointWrite = options.skip_checkpoint_write;
1825
1826 /* we assume this is protected by lock_kernel() in mount/umount */
1827 list_add_tail(&dev->devList, &yaffs_dev_list);
1828
1829 init_MUTEX(&dev->grossLock);
1830
1831 yaffs_GrossLock(dev);
1832
1833 err = yaffs_GutsInitialise(dev);
1834
1835 T(YAFFS_TRACE_OS,
1836 ("yaffs_read_super: guts initialised %s\n",
1837 (err == YAFFS_OK) ? "OK" : "FAILED"));
1838
1839 /* Release lock before yaffs_get_inode() */
1840 yaffs_GrossUnlock(dev);
1841
1842 /* Create root inode */
1843 if (err == YAFFS_OK)
1844 inode = yaffs_get_inode(sb, S_IFDIR | 0755, 0,
1845 yaffs_Root(dev));
1846
1847 if (!inode)
1848 return NULL;
1849
1850 inode->i_op = &yaffs_dir_inode_operations;
1851 inode->i_fop = &yaffs_dir_operations;
1852
1853 T(YAFFS_TRACE_OS, ("yaffs_read_super: got root inode\n"));
1854
1855 root = d_alloc_root(inode);
1856
1857 T(YAFFS_TRACE_OS, ("yaffs_read_super: d_alloc_root done\n"));
1858
1859 if (!root) {
1860 iput(inode);
1861 return NULL;
1862 }
1863 sb->s_root = root;
1864
1865 T(YAFFS_TRACE_OS, ("yaffs_read_super: done\n"));
1866 return sb;
1867 }
1868
1869
1870 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2,5,0))
1871 static int yaffs_internal_read_super_mtd(struct super_block *sb, void *data,
1872 int silent)
1873 {
1874 return yaffs_internal_read_super(1, sb, data, silent) ? 0 : -EINVAL;
1875 }
1876
1877 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2,6,17))
1878 static int yaffs_read_super(struct file_system_type *fs,
1879 int flags, const char *dev_name,
1880 void *data, struct vfsmount *mnt)
1881 {
1882
1883 return get_sb_bdev(fs, flags, dev_name, data,
1884 yaffs_internal_read_super_mtd, mnt);
1885 }
1886 #else
1887 static struct super_block *yaffs_read_super(struct file_system_type *fs,
1888 int flags, const char *dev_name,
1889 void *data)
1890 {
1891
1892 return get_sb_bdev(fs, flags, dev_name, data,
1893 yaffs_internal_read_super_mtd);
1894 }
1895 #endif
1896
1897 static struct file_system_type yaffs_fs_type = {
1898 .owner = THIS_MODULE,
1899 .name = "yaffs",
1900 .get_sb = yaffs_read_super,
1901 .kill_sb = kill_block_super,
1902 .fs_flags = FS_REQUIRES_DEV,
1903 };
1904 #else
1905 static struct super_block *yaffs_read_super(struct super_block *sb, void *data,
1906 int silent)
1907 {
1908 return yaffs_internal_read_super(1, sb, data, silent);
1909 }
1910
1911 static DECLARE_FSTYPE(yaffs_fs_type, "yaffs", yaffs_read_super,
1912 FS_REQUIRES_DEV);
1913 #endif
1914
1915
1916 #ifdef CONFIG_YAFFS_YAFFS2
1917
1918 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2,5,0))
1919 static int yaffs2_internal_read_super_mtd(struct super_block *sb, void *data,
1920 int silent)
1921 {
1922 return yaffs_internal_read_super(2, sb, data, silent) ? 0 : -EINVAL;
1923 }
1924
1925 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2,6,17))
1926 static int yaffs2_read_super(struct file_system_type *fs,
1927 int flags, const char *dev_name, void *data,
1928 struct vfsmount *mnt)
1929 {
1930 return get_sb_bdev(fs, flags, dev_name, data,
1931 yaffs2_internal_read_super_mtd, mnt);
1932 }
1933 #else
1934 static struct super_block *yaffs2_read_super(struct file_system_type *fs,
1935 int flags, const char *dev_name,
1936 void *data)
1937 {
1938
1939 return get_sb_bdev(fs, flags, dev_name, data,
1940 yaffs2_internal_read_super_mtd);
1941 }
1942 #endif
1943
1944 static struct file_system_type yaffs2_fs_type = {
1945 .owner = THIS_MODULE,
1946 .name = "yaffs2",
1947 .get_sb = yaffs2_read_super,
1948 .kill_sb = kill_block_super,
1949 .fs_flags = FS_REQUIRES_DEV,
1950 };
1951 #else
1952 static struct super_block *yaffs2_read_super(struct super_block *sb,
1953 void *data, int silent)
1954 {
1955 return yaffs_internal_read_super(2, sb, data, silent);
1956 }
1957
1958 static DECLARE_FSTYPE(yaffs2_fs_type, "yaffs2", yaffs2_read_super,
1959 FS_REQUIRES_DEV);
1960 #endif
1961
1962 #endif /* CONFIG_YAFFS_YAFFS2 */
1963
1964 static struct proc_dir_entry *my_proc_entry;
1965
1966 static char *yaffs_dump_dev(char *buf, yaffs_Device * dev)
1967 {
1968 buf += sprintf(buf, "startBlock......... %d\n", dev->startBlock);
1969 buf += sprintf(buf, "endBlock........... %d\n", dev->endBlock);
1970 buf += sprintf(buf, "nDataBytesPerChunk. %d\n", dev->nDataBytesPerChunk);
1971 buf += sprintf(buf, "chunkGroupBits..... %d\n", dev->chunkGroupBits);
1972 buf += sprintf(buf, "chunkGroupSize..... %d\n", dev->chunkGroupSize);
1973 buf += sprintf(buf, "nErasedBlocks...... %d\n", dev->nErasedBlocks);
1974 buf += sprintf(buf, "nReservedBlocks.... %d\n", dev->nReservedBlocks);
1975 buf += sprintf(buf, "nCheckptResBlocks.. %d\n", dev->nCheckpointReservedBlocks);
1976 buf += sprintf(buf, "blocksInCheckpoint. %d\n", dev->blocksInCheckpoint);
1977 buf += sprintf(buf, "nTnodesCreated..... %d\n", dev->nTnodesCreated);
1978 buf += sprintf(buf, "nFreeTnodes........ %d\n", dev->nFreeTnodes);
1979 buf += sprintf(buf, "nObjectsCreated.... %d\n", dev->nObjectsCreated);
1980 buf += sprintf(buf, "nFreeObjects....... %d\n", dev->nFreeObjects);
1981 buf += sprintf(buf, "nFreeChunks........ %d\n", dev->nFreeChunks);
1982 buf += sprintf(buf, "nPageWrites........ %d\n", dev->nPageWrites);
1983 buf += sprintf(buf, "nPageReads......... %d\n", dev->nPageReads);
1984 buf += sprintf(buf, "nBlockErasures..... %d\n", dev->nBlockErasures);
1985 buf += sprintf(buf, "nGCCopies.......... %d\n", dev->nGCCopies);
1986 buf +=
1987 sprintf(buf, "garbageCollections. %d\n", dev->garbageCollections);
1988 buf +=
1989 sprintf(buf, "passiveGCs......... %d\n",
1990 dev->passiveGarbageCollections);
1991 buf += sprintf(buf, "nRetriedWrites..... %d\n", dev->nRetriedWrites);
1992 buf += sprintf(buf, "nShortOpCaches..... %d\n", dev->nShortOpCaches);
1993 buf += sprintf(buf, "nRetireBlocks...... %d\n", dev->nRetiredBlocks);
1994 buf += sprintf(buf, "eccFixed........... %d\n", dev->eccFixed);
1995 buf += sprintf(buf, "eccUnfixed......... %d\n", dev->eccUnfixed);
1996 buf += sprintf(buf, "tagsEccFixed....... %d\n", dev->tagsEccFixed);
1997 buf += sprintf(buf, "tagsEccUnfixed..... %d\n", dev->tagsEccUnfixed);
1998 buf += sprintf(buf, "cacheHits.......... %d\n", dev->cacheHits);
1999 buf += sprintf(buf, "nDeletedFiles...... %d\n", dev->nDeletedFiles);
2000 buf += sprintf(buf, "nUnlinkedFiles..... %d\n", dev->nUnlinkedFiles);
2001 buf +=
2002 sprintf(buf, "nBackgroudDeletions %d\n", dev->nBackgroundDeletions);
2003 buf += sprintf(buf, "useNANDECC......... %d\n", dev->useNANDECC);
2004 buf += sprintf(buf, "isYaffs2........... %d\n", dev->isYaffs2);
2005
2006 return buf;
2007 }
2008
2009 static int yaffs_proc_read(char *page,
2010 char **start,
2011 off_t offset, int count, int *eof, void *data)
2012 {
2013 struct list_head *item;
2014 char *buf = page;
2015 int step = offset;
2016 int n = 0;
2017
2018 /* Get proc_file_read() to step 'offset' by one on each sucessive call.
2019 * We use 'offset' (*ppos) to indicate where we are in devList.
2020 * This also assumes the user has posted a read buffer large
2021 * enough to hold the complete output; but that's life in /proc.
2022 */
2023
2024 *(int *)start = 1;
2025
2026 /* Print header first */
2027 if (step == 0) {
2028 buf += sprintf(buf, "YAFFS built:" __DATE__ " " __TIME__
2029 "\n%s\n%s\n", yaffs_fs_c_version,
2030 yaffs_guts_c_version);
2031 }
2032
2033 /* hold lock_kernel while traversing yaffs_dev_list */
2034 lock_kernel();
2035
2036 /* Locate and print the Nth entry. Order N-squared but N is small. */
2037 list_for_each(item, &yaffs_dev_list) {
2038 yaffs_Device *dev = list_entry(item, yaffs_Device, devList);
2039 if (n < step) {
2040 n++;
2041 continue;
2042 }
2043 buf += sprintf(buf, "\nDevice %d \"%s\"\n", n, dev->name);
2044 buf = yaffs_dump_dev(buf, dev);
2045 break;
2046 }
2047 unlock_kernel();
2048
2049 return buf - page < count ? buf - page : count;
2050 }
2051
2052 /**
2053 * Set the verbosity of the warnings and error messages.
2054 *
2055 * Note that the names can only be a..z or _ with the current code.
2056 */
2057
2058 static struct {
2059 char *mask_name;
2060 unsigned mask_bitfield;
2061 } mask_flags[] = {
2062 {"allocate", YAFFS_TRACE_ALLOCATE},
2063 {"always", YAFFS_TRACE_ALWAYS},
2064 {"bad_blocks", YAFFS_TRACE_BAD_BLOCKS},
2065 {"buffers", YAFFS_TRACE_BUFFERS},
2066 {"bug", YAFFS_TRACE_BUG},
2067 {"checkpt", YAFFS_TRACE_CHECKPOINT},
2068 {"deletion", YAFFS_TRACE_DELETION},
2069 {"erase", YAFFS_TRACE_ERASE},
2070 {"error", YAFFS_TRACE_ERROR},
2071 {"gc_detail", YAFFS_TRACE_GC_DETAIL},
2072 {"gc", YAFFS_TRACE_GC},
2073 {"mtd", YAFFS_TRACE_MTD},
2074 {"nandaccess", YAFFS_TRACE_NANDACCESS},
2075 {"os", YAFFS_TRACE_OS},
2076 {"scan_debug", YAFFS_TRACE_SCAN_DEBUG},
2077 {"scan", YAFFS_TRACE_SCAN},
2078 {"tracing", YAFFS_TRACE_TRACING},
2079
2080 {"verify", YAFFS_TRACE_VERIFY},
2081 {"verify_nand", YAFFS_TRACE_VERIFY_NAND},
2082 {"verify_full", YAFFS_TRACE_VERIFY_FULL},
2083 {"verify_all", YAFFS_TRACE_VERIFY_ALL},
2084
2085 {"write", YAFFS_TRACE_WRITE},
2086 {"all", 0xffffffff},
2087 {"none", 0},
2088 {NULL, 0},
2089 };
2090
2091 #define MAX_MASK_NAME_LENGTH 40
2092 static int yaffs_proc_write(struct file *file, const char *buf,
2093 unsigned long count, void *data)
2094 {
2095 unsigned rg = 0, mask_bitfield;
2096 char *end;
2097 char *mask_name;
2098 char *x;
2099 char substring[MAX_MASK_NAME_LENGTH+1];
2100 int i;
2101 int done = 0;
2102 int add, len = 0;
2103 int pos = 0;
2104
2105 rg = yaffs_traceMask;
2106
2107 while (!done && (pos < count)) {
2108 done = 1;
2109 while ((pos < count) && isspace(buf[pos])) {
2110 pos++;
2111 }
2112
2113 switch (buf[pos]) {
2114 case '+':
2115 case '-':
2116 case '=':
2117 add = buf[pos];
2118 pos++;
2119 break;
2120
2121 default:
2122 add = ' ';
2123 break;
2124 }
2125 mask_name = NULL;
2126
2127 mask_bitfield = simple_strtoul(buf + pos, &end, 0);
2128 if (end > buf + pos) {
2129 mask_name = "numeral";
2130 len = end - (buf + pos);
2131 done = 0;
2132 } else {
2133 for(x = buf + pos, i = 0;
2134 (*x == '_' || (*x >='a' && *x <= 'z')) &&
2135 i <MAX_MASK_NAME_LENGTH; x++, i++, pos++)
2136 substring[i] = *x;
2137 substring[i] = '\0';
2138
2139 for (i = 0; mask_flags[i].mask_name != NULL; i++) {
2140 //len = strlen(mask_flags[i].mask_name);
2141 //if (strncmp(buf + pos, mask_flags[i].mask_name, len) == 0) {
2142 if(strcmp(substring,mask_flags[i].mask_name) == 0){
2143 mask_name = mask_flags[i].mask_name;
2144 mask_bitfield = mask_flags[i].mask_bitfield;
2145 done = 0;
2146 break;
2147 }
2148 }
2149 }
2150
2151 if (mask_name != NULL) {
2152 // pos += len;
2153 done = 0;
2154 switch(add) {
2155 case '-':
2156 rg &= ~mask_bitfield;
2157 break;
2158 case '+':
2159 rg |= mask_bitfield;
2160 break;
2161 case '=':
2162 rg = mask_bitfield;
2163 break;
2164 default:
2165 rg |= mask_bitfield;
2166 break;
2167 }
2168 }
2169 }
2170
2171 yaffs_traceMask = rg | YAFFS_TRACE_ALWAYS;
2172
2173 printk("new trace = 0x%08X\n",yaffs_traceMask);
2174
2175 if (rg & YAFFS_TRACE_ALWAYS) {
2176 for (i = 0; mask_flags[i].mask_name != NULL; i++) {
2177 char flag;
2178 flag = ((rg & mask_flags[i].mask_bitfield) == mask_flags[i].mask_bitfield) ? '+' : '-';
2179 printk("%c%s\n", flag, mask_flags[i].mask_name);
2180 }
2181 }
2182
2183 return count;
2184 }
2185
2186 /* Stuff to handle installation of file systems */
2187 struct file_system_to_install {
2188 struct file_system_type *fst;
2189 int installed;
2190 };
2191
2192 static struct file_system_to_install fs_to_install[] = {
2193 //#ifdef CONFIG_YAFFS_YAFFS1
2194 {&yaffs_fs_type, 0},
2195 //#endif
2196 //#ifdef CONFIG_YAFFS_YAFFS2
2197 {&yaffs2_fs_type, 0},
2198 //#endif
2199 {NULL, 0}
2200 };
2201
2202 static int __init init_yaffs_fs(void)
2203 {
2204 int error = 0;
2205 struct file_system_to_install *fsinst;
2206
2207 T(YAFFS_TRACE_ALWAYS,
2208 ("yaffs " __DATE__ " " __TIME__ " Installing. \n"));
2209
2210 /* Install the proc_fs entry */
2211 my_proc_entry = create_proc_entry("yaffs",
2212 S_IRUGO | S_IFREG,
2213 &proc_root);
2214
2215 if (my_proc_entry) {
2216 my_proc_entry->write_proc = yaffs_proc_write;
2217 my_proc_entry->read_proc = yaffs_proc_read;
2218 my_proc_entry->data = NULL;
2219 } else {
2220 return -ENOMEM;
2221 }
2222
2223 /* Now add the file system entries */
2224
2225 fsinst = fs_to_install;
2226
2227 while (fsinst->fst && !error) {
2228 error = register_filesystem(fsinst->fst);
2229 if (!error) {
2230 fsinst->installed = 1;
2231 }
2232 fsinst++;
2233 }
2234
2235 /* Any errors? uninstall */
2236 if (error) {
2237 fsinst = fs_to_install;
2238
2239 while (fsinst->fst) {
2240 if (fsinst->installed) {
2241 unregister_filesystem(fsinst->fst);
2242 fsinst->installed = 0;
2243 }
2244 fsinst++;
2245 }
2246 }
2247
2248 return error;
2249 }
2250
2251 static void __exit exit_yaffs_fs(void)
2252 {
2253
2254 struct file_system_to_install *fsinst;
2255
2256 T(YAFFS_TRACE_ALWAYS, ("yaffs " __DATE__ " " __TIME__
2257 " removing. \n"));
2258
2259 remove_proc_entry("yaffs", &proc_root);
2260
2261 fsinst = fs_to_install;
2262
2263 while (fsinst->fst) {
2264 if (fsinst->installed) {
2265 unregister_filesystem(fsinst->fst);
2266 fsinst->installed = 0;
2267 }
2268 fsinst++;
2269 }
2270
2271 }
2272
2273 module_init(init_yaffs_fs)
2274 module_exit(exit_yaffs_fs)
2275
2276 MODULE_DESCRIPTION("YAFFS2 - a NAND specific flash file system");
2277 MODULE_AUTHOR("Charles Manning, Aleph One Ltd., 2002-2006");
2278 MODULE_LICENSE("GPL");
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