2 * YAFFS: Yet Another Flash File System. A NAND-flash specific file system.
4 * Copyright (C) 2002-2009 Aleph One Ltd.
5 * for Toby Churchill Ltd and Brightstar Engineering
7 * Created by Charles Manning <charles@aleph1.co.uk>
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
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.
23 * This is the file system front-end to YAFFS that hooks it up to
27 * >> 2.4: sb->u.generic_sbp points to the yaffs_Device associated with
29 * >> 2.6: sb->s_fs_info points to the yaffs_Device associated with this
31 * >> inode->u.generic_ip points to the associated yaffs_Object.
34 const char *yaffs_fs_c_version =
35 "$Id: yaffs_fs.c,v 1.102 2010-03-15 23:10:33 charles Exp $";
36 extern const char *yaffs_guts_c_version;
38 #include <linux/version.h>
40 #if (LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 10))
41 #define YAFFS_COMPILE_BACKGROUND
44 #if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,28))
45 #define YAFFS_COMPILE_EXPORTFS
49 #if (LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 19))
50 #include <linux/config.h>
52 #include <linux/kernel.h>
53 #include <linux/module.h>
54 #include <linux/slab.h>
55 #include <linux/init.h>
57 #include <linux/proc_fs.h>
58 #include <linux/smp_lock.h>
59 #include <linux/pagemap.h>
60 #include <linux/mtd/mtd.h>
61 #include <linux/interrupt.h>
62 #include <linux/string.h>
63 #include <linux/ctype.h>
65 #ifdef YAFFS_COMPILE_EXPORTFS
66 #include <linux/exportfs.h>
69 #ifdef YAFFS_COMPILE_BACKGROUND
70 #include <linux/kthread.h>
71 #include <linux/delay.h>
75 #include "asm/div64.h"
80 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0))
82 #include <linux/statfs.h> /* Added NCB 15-8-2003 */
83 #include <linux/statfs.h>
84 #define UnlockPage(p) unlock_page(p)
85 #define Page_Uptodate(page) test_bit(PG_uptodate, &(page)->flags)
87 /* FIXME: use sb->s_id instead ? */
88 #define yaffs_devname(sb, buf) bdevname(sb->s_bdev, buf)
92 #include <linux/locks.h>
93 #define BDEVNAME_SIZE 0
94 #define yaffs_devname(sb, buf) kdevname(sb->s_dev)
96 #if (LINUX_VERSION_CODE < KERNEL_VERSION(2, 5, 0))
97 /* added NCB 26/5/2006 for 2.4.25-vrs2-tcl1 kernel */
103 #if (LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 26))
104 #define YPROC_ROOT (&proc_root)
106 #define YPROC_ROOT NULL
109 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 17))
110 #define WRITE_SIZE_STR "writesize"
111 #define WRITE_SIZE(mtd) ((mtd)->writesize)
113 #define WRITE_SIZE_STR "oobblock"
114 #define WRITE_SIZE(mtd) ((mtd)->oobblock)
117 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 27))
118 #define YAFFS_USE_WRITE_BEGIN_END 1
120 #define YAFFS_USE_WRITE_BEGIN_END 0
123 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 28))
124 static uint32_t YCALCBLOCKS(uint64_t partition_size, uint32_t block_size)
126 uint64_t result = partition_size;
127 do_div(result, block_size);
128 return (uint32_t)result;
131 #define YCALCBLOCKS(s, b) ((s)/(b))
134 #include <linux/uaccess.h>
136 #include "yportenv.h"
137 #include "yaffs_trace.h"
138 #include "yaffs_guts.h"
140 #include "yaffs_linux.h"
142 #include <linux/mtd/mtd.h>
143 #include "yaffs_mtdif.h"
144 #include "yaffs_mtdif1.h"
145 #include "yaffs_mtdif2.h"
147 unsigned int yaffs_traceMask = YAFFS_TRACE_BAD_BLOCKS | YAFFS_TRACE_ALWAYS;
148 unsigned int yaffs_wr_attempts = YAFFS_WR_ATTEMPTS;
149 unsigned int yaffs_auto_checkpoint = 1;
150 unsigned int yaffs_gc_control = 1;
152 /* Module Parameters */
153 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0))
154 module_param(yaffs_traceMask, uint, 0644);
155 module_param(yaffs_wr_attempts, uint, 0644);
156 module_param(yaffs_auto_checkpoint, uint, 0644);
157 module_param(yaffs_gc_control, uint, 0644);
159 MODULE_PARM(yaffs_traceMask, "i");
160 MODULE_PARM(yaffs_wr_attempts, "i");
161 MODULE_PARM(yaffs_auto_checkpoint, "i");
162 MODULE_PARM(yaffs_gc_control, "i");
165 #if (LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 25))
166 /* use iget and read_inode */
167 #define Y_IGET(sb, inum) iget((sb), (inum))
168 static void yaffs_read_inode(struct inode *inode);
171 /* Call local equivalent */
172 #define YAFFS_USE_OWN_IGET
173 #define Y_IGET(sb, inum) yaffs_iget((sb), (inum))
175 static struct inode *yaffs_iget(struct super_block *sb, unsigned long ino);
178 /*#define T(x) printk x */
180 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 18))
181 #define yaffs_InodeToObjectLV(iptr) ((iptr)->i_private)
183 #define yaffs_InodeToObjectLV(iptr) ((iptr)->u.generic_ip)
186 #define yaffs_InodeToObject(iptr) ((yaffs_Object *)(yaffs_InodeToObjectLV(iptr)))
187 #define yaffs_DentryToObject(dptr) yaffs_InodeToObject((dptr)->d_inode)
189 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0))
190 #define yaffs_SuperToDevice(sb) ((yaffs_Device *)sb->s_fs_info)
192 #define yaffs_SuperToDevice(sb) ((yaffs_Device *)sb->u.generic_sbp)
196 #define update_dir_time(dir) do {\
197 (dir)->i_ctime = (dir)->i_mtime = CURRENT_TIME; \
200 static void yaffs_put_super(struct super_block *sb);
202 static ssize_t yaffs_file_write(struct file *f, const char *buf, size_t n,
204 static ssize_t yaffs_hold_space(struct file *f);
205 static void yaffs_release_space(struct file *f);
207 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 17))
208 static int yaffs_file_flush(struct file *file, fl_owner_t id);
210 static int yaffs_file_flush(struct file *file);
213 static int yaffs_sync_object(struct file *file, struct dentry *dentry,
216 static int yaffs_readdir(struct file *f, void *dirent, filldir_t filldir);
218 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0))
219 static int yaffs_create(struct inode *dir, struct dentry *dentry, int mode,
220 struct nameidata *n);
221 static struct dentry *yaffs_lookup(struct inode *dir, struct dentry *dentry,
222 struct nameidata *n);
224 static int yaffs_create(struct inode *dir, struct dentry *dentry, int mode);
225 static struct dentry *yaffs_lookup(struct inode *dir, struct dentry *dentry);
227 static int yaffs_link(struct dentry *old_dentry, struct inode *dir,
228 struct dentry *dentry);
229 static int yaffs_unlink(struct inode *dir, struct dentry *dentry);
230 static int yaffs_symlink(struct inode *dir, struct dentry *dentry,
231 const char *symname);
232 static int yaffs_mkdir(struct inode *dir, struct dentry *dentry, int mode);
234 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0))
235 static int yaffs_mknod(struct inode *dir, struct dentry *dentry, int mode,
238 static int yaffs_mknod(struct inode *dir, struct dentry *dentry, int mode,
241 static int yaffs_rename(struct inode *old_dir, struct dentry *old_dentry,
242 struct inode *new_dir, struct dentry *new_dentry);
243 static int yaffs_setattr(struct dentry *dentry, struct iattr *attr);
245 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 17))
246 static int yaffs_sync_fs(struct super_block *sb, int wait);
247 static void yaffs_write_super(struct super_block *sb);
249 static int yaffs_sync_fs(struct super_block *sb);
250 static int yaffs_write_super(struct super_block *sb);
253 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 17))
254 static int yaffs_statfs(struct dentry *dentry, struct kstatfs *buf);
255 #elif (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0))
256 static int yaffs_statfs(struct super_block *sb, struct kstatfs *buf);
258 static int yaffs_statfs(struct super_block *sb, struct statfs *buf);
261 #ifdef YAFFS_HAS_PUT_INODE
262 static void yaffs_put_inode(struct inode *inode);
265 static void yaffs_delete_inode(struct inode *);
266 static void yaffs_clear_inode(struct inode *);
268 static int yaffs_readpage(struct file *file, struct page *page);
269 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0))
270 static int yaffs_writepage(struct page *page, struct writeback_control *wbc);
272 static int yaffs_writepage(struct page *page);
276 #if (YAFFS_USE_WRITE_BEGIN_END != 0)
277 static int yaffs_write_begin(struct file *filp, struct address_space *mapping,
278 loff_t pos, unsigned len, unsigned flags,
279 struct page **pagep, void **fsdata);
280 static int yaffs_write_end(struct file *filp, struct address_space *mapping,
281 loff_t pos, unsigned len, unsigned copied,
282 struct page *pg, void *fsdadata);
284 static int yaffs_prepare_write(struct file *f, struct page *pg,
285 unsigned offset, unsigned to);
286 static int yaffs_commit_write(struct file *f, struct page *pg, unsigned offset,
291 static int yaffs_readlink(struct dentry *dentry, char __user *buffer,
293 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 13))
294 static void *yaffs_follow_link(struct dentry *dentry, struct nameidata *nd);
296 static int yaffs_follow_link(struct dentry *dentry, struct nameidata *nd);
298 static loff_t yaffs_dir_llseek(struct file *file, loff_t offset, int origin);
300 static struct address_space_operations yaffs_file_address_operations = {
301 .readpage = yaffs_readpage,
302 .writepage = yaffs_writepage,
303 #if (YAFFS_USE_WRITE_BEGIN_END > 0)
304 .write_begin = yaffs_write_begin,
305 .write_end = yaffs_write_end,
307 .prepare_write = yaffs_prepare_write,
308 .commit_write = yaffs_commit_write,
312 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 22))
313 static const struct file_operations yaffs_file_operations = {
314 .read = do_sync_read,
315 .write = do_sync_write,
316 .aio_read = generic_file_aio_read,
317 .aio_write = generic_file_aio_write,
318 .mmap = generic_file_mmap,
319 .flush = yaffs_file_flush,
320 .fsync = yaffs_sync_object,
321 .splice_read = generic_file_splice_read,
322 .splice_write = generic_file_splice_write,
323 .llseek = generic_file_llseek,
326 #elif (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 18))
328 static const struct file_operations yaffs_file_operations = {
329 .read = do_sync_read,
330 .write = do_sync_write,
331 .aio_read = generic_file_aio_read,
332 .aio_write = generic_file_aio_write,
333 .mmap = generic_file_mmap,
334 .flush = yaffs_file_flush,
335 .fsync = yaffs_sync_object,
336 .sendfile = generic_file_sendfile,
341 static const struct file_operations yaffs_file_operations = {
342 .read = generic_file_read,
343 .write = generic_file_write,
344 .mmap = generic_file_mmap,
345 .flush = yaffs_file_flush,
346 .fsync = yaffs_sync_object,
347 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0))
348 .sendfile = generic_file_sendfile,
353 #if (LINUX_VERSION_CODE < KERNEL_VERSION(2,6,25))
354 static void zero_user_segment(struct page *page, unsigned start, unsigned end)
356 void * kaddr = kmap_atomic(page, KM_USER0);
357 memset(kaddr + start, 0, end - start);
358 kunmap_atomic(kaddr, KM_USER0);
359 flush_dcache_page(page);
364 static const struct inode_operations yaffs_file_inode_operations = {
365 .setattr = yaffs_setattr,
368 static const struct inode_operations yaffs_symlink_inode_operations = {
369 .readlink = yaffs_readlink,
370 .follow_link = yaffs_follow_link,
371 .setattr = yaffs_setattr,
374 static const struct inode_operations yaffs_dir_inode_operations = {
375 .create = yaffs_create,
376 .lookup = yaffs_lookup,
378 .unlink = yaffs_unlink,
379 .symlink = yaffs_symlink,
380 .mkdir = yaffs_mkdir,
381 .rmdir = yaffs_unlink,
382 .mknod = yaffs_mknod,
383 .rename = yaffs_rename,
384 .setattr = yaffs_setattr,
387 static const struct file_operations yaffs_dir_operations = {
388 .read = generic_read_dir,
389 .readdir = yaffs_readdir,
390 .fsync = yaffs_sync_object,
391 .llseek = yaffs_dir_llseek,
394 static const struct super_operations yaffs_super_ops = {
395 .statfs = yaffs_statfs,
397 #ifndef YAFFS_USE_OWN_IGET
398 .read_inode = yaffs_read_inode,
400 #ifdef YAFFS_HAS_PUT_INODE
401 .put_inode = yaffs_put_inode,
403 .put_super = yaffs_put_super,
404 .delete_inode = yaffs_delete_inode,
405 .clear_inode = yaffs_clear_inode,
406 .sync_fs = yaffs_sync_fs,
407 .write_super = yaffs_write_super,
410 static unsigned yaffs_gc_control_callback(yaffs_Device *dev)
412 return yaffs_gc_control;
415 static void yaffs_GrossLock(yaffs_Device *dev)
417 T(LOCK_TRACE && YAFFS_TRACE_OS, ("yaffs locking %p\n", current));
418 down(&(yaffs_DeviceToContext(dev)->grossLock));
419 T(LOCK_TRACE && YAFFS_TRACE_OS, ("yaffs locked %p\n", current));
422 static void yaffs_GrossUnlock(yaffs_Device *dev)
424 T(LOCK_TRACE && YAFFS_TRACE_OS, ("yaffs unlocking %p\n", current));
425 up(&(yaffs_DeviceToContext(dev)->grossLock));
428 #ifdef YAFFS_COMPILE_EXPORTFS
430 static struct inode *
431 yaffs2_nfs_get_inode(struct super_block *sb, uint64_t ino, uint32_t generation)
433 return Y_IGET(sb, ino);
436 static struct dentry *
437 yaffs2_fh_to_dentry(struct super_block *sb, struct fid *fid, int fh_len, int fh_type)
439 return generic_fh_to_dentry(sb, fid, fh_len, fh_type, yaffs2_nfs_get_inode) ;
442 static struct dentry *
443 yaffs2_fh_to_parent(struct super_block *sb, struct fid *fid, int fh_len, int fh_type)
445 return generic_fh_to_parent(sb, fid, fh_len, fh_type, yaffs2_nfs_get_inode);
448 struct dentry *yaffs2_get_parent(struct dentry *dentry)
451 struct super_block *sb = dentry->d_inode->i_sb;
452 struct dentry *parent = ERR_PTR(-ENOENT);
454 unsigned long parent_ino;
456 yaffs_Object *parent_obj;
458 d_obj = yaffs_InodeToObject(dentry->d_inode);
461 parent_obj = d_obj->parent;
463 parent_ino = yaffs_GetObjectInode(parent_obj);
464 inode = Y_IGET(sb, parent_ino);
467 parent = ERR_CAST(inode);
469 parent = d_obtain_alias(inode);
470 if (!IS_ERR(parent)) {
471 parent = ERR_PTR(-ENOMEM);
481 /* Just declare a zero structure as a NULL value implies
482 * using the default functions of expfs.
485 static struct export_operations yaffs_export_ops =
487 .fh_to_dentry = yaffs2_fh_to_dentry,
488 .fh_to_parent = yaffs2_fh_to_parent,
489 .get_parent = yaffs2_get_parent,
494 /*-----------------------------------------------------------------*/
495 /* Directory search context allows us to unlock access to yaffs during
496 * filldir without causing problems with the directory being modified.
497 * This is similar to the tried and tested mechanism used in yaffs direct.
499 * A search context iterates along a doubly linked list of siblings in the
500 * directory. If the iterating object is deleted then this would corrupt
501 * the list iteration, likely causing a crash. The search context avoids
502 * this by using the removeObjectCallback to move the search context to the
503 * next object before the object is deleted.
505 * Many readdirs (and thus seach conexts) may be alive simulateously so
506 * each yaffs_Device has a list of these.
508 * A seach context lives for the duration of a readdir.
510 * All these functions must be called while yaffs is locked.
513 struct yaffs_SearchContext {
515 yaffs_Object *dirObj;
516 yaffs_Object *nextReturn;
517 struct ylist_head others;
521 * yaffs_NewSearch() creates a new search context, initialises it and
522 * adds it to the device's search context list.
524 * Called at start of readdir.
526 static struct yaffs_SearchContext * yaffs_NewSearch(yaffs_Object *dir)
528 yaffs_Device *dev = dir->myDev;
529 struct yaffs_SearchContext *sc = YMALLOC(sizeof(struct yaffs_SearchContext));
533 if( ylist_empty(&sc->dirObj->variant.directoryVariant.children))
534 sc->nextReturn = NULL;
536 sc->nextReturn = ylist_entry(
537 dir->variant.directoryVariant.children.next,
538 yaffs_Object,siblings);
539 YINIT_LIST_HEAD(&sc->others);
540 ylist_add(&sc->others,&(yaffs_DeviceToContext(dev)->searchContexts));
546 * yaffs_EndSearch() disposes of a search context and cleans up.
548 static void yaffs_EndSearch(struct yaffs_SearchContext * sc)
551 ylist_del(&sc->others);
557 * yaffs_SearchAdvance() moves a search context to the next object.
558 * Called when the search iterates or when an object removal causes
559 * the search context to be moved to the next object.
561 static void yaffs_SearchAdvance(struct yaffs_SearchContext *sc)
566 if( sc->nextReturn == NULL ||
567 ylist_empty(&sc->dirObj->variant.directoryVariant.children))
568 sc->nextReturn = NULL;
570 struct ylist_head *next = sc->nextReturn->siblings.next;
572 if( next == &sc->dirObj->variant.directoryVariant.children)
573 sc->nextReturn = NULL; /* end of list */
575 sc->nextReturn = ylist_entry(next,yaffs_Object,siblings);
580 * yaffs_RemoveObjectCallback() is called when an object is unlinked.
581 * We check open search contexts and advance any which are currently
582 * on the object being iterated.
584 static void yaffs_RemoveObjectCallback(yaffs_Object *obj)
587 struct ylist_head *i;
588 struct yaffs_SearchContext *sc;
589 struct ylist_head *search_contexts = &(yaffs_DeviceToContext(obj->myDev)->searchContexts);
592 /* Iterate through the directory search contexts.
593 * If any are currently on the object being removed, then advance
594 * the search context to the next object to prevent a hanging pointer.
596 ylist_for_each(i, search_contexts) {
598 sc = ylist_entry(i, struct yaffs_SearchContext,others);
599 if(sc->nextReturn == obj)
600 yaffs_SearchAdvance(sc);
607 /*-----------------------------------------------------------------*/
609 static int yaffs_readlink(struct dentry *dentry, char __user *buffer,
612 unsigned char *alias;
615 yaffs_Device *dev = yaffs_DentryToObject(dentry)->myDev;
617 yaffs_GrossLock(dev);
619 alias = yaffs_GetSymlinkAlias(yaffs_DentryToObject(dentry));
621 yaffs_GrossUnlock(dev);
626 ret = vfs_readlink(dentry, buffer, buflen, alias);
631 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 13))
632 static void *yaffs_follow_link(struct dentry *dentry, struct nameidata *nd)
634 static int yaffs_follow_link(struct dentry *dentry, struct nameidata *nd)
637 unsigned char *alias;
639 yaffs_Device *dev = yaffs_DentryToObject(dentry)->myDev;
641 yaffs_GrossLock(dev);
643 alias = yaffs_GetSymlinkAlias(yaffs_DentryToObject(dentry));
645 yaffs_GrossUnlock(dev);
652 ret = vfs_follow_link(nd, alias);
655 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 13))
662 struct inode *yaffs_get_inode(struct super_block *sb, int mode, int dev,
666 * Lookup is used to find objects in the fs
668 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0))
670 static struct dentry *yaffs_lookup(struct inode *dir, struct dentry *dentry,
673 static struct dentry *yaffs_lookup(struct inode *dir, struct dentry *dentry)
677 struct inode *inode = NULL; /* NCB 2.5/2.6 needs NULL here */
679 yaffs_Device *dev = yaffs_InodeToObject(dir)->myDev;
681 if(current != yaffs_DeviceToContext(dev)->readdirProcess)
682 yaffs_GrossLock(dev);
685 ("yaffs_lookup for %d:%s\n",
686 yaffs_InodeToObject(dir)->objectId, dentry->d_name.name));
688 obj = yaffs_FindObjectByName(yaffs_InodeToObject(dir),
689 dentry->d_name.name);
691 obj = yaffs_GetEquivalentObject(obj); /* in case it was a hardlink */
693 /* Can't hold gross lock when calling yaffs_get_inode() */
694 if(current != yaffs_DeviceToContext(dev)->readdirProcess)
695 yaffs_GrossUnlock(dev);
699 ("yaffs_lookup found %d\n", obj->objectId));
701 inode = yaffs_get_inode(dir->i_sb, obj->yst_mode, 0, obj);
705 ("yaffs_loookup dentry \n"));
706 /* #if 0 asserted by NCB for 2.5/6 compatability - falls through to
707 * d_add even if NULL inode */
709 /*dget(dentry); // try to solve directory bug */
710 d_add(dentry, inode);
718 T(YAFFS_TRACE_OS, ("yaffs_lookup not found\n"));
722 /* added NCB for 2.5/6 compatability - forces add even if inode is
723 * NULL which creates dentry hash */
724 d_add(dentry, inode);
730 #ifdef YAFFS_HAS_PUT_INODE
732 /* For now put inode is just for debugging
733 * Put inode is called when the inode **structure** is put.
735 static void yaffs_put_inode(struct inode *inode)
738 ("yaffs_put_inode: ino %d, count %d\n", (int)inode->i_ino,
739 atomic_read(&inode->i_count)));
744 /* clear is called to tell the fs to release any per-inode data it holds */
745 static void yaffs_clear_inode(struct inode *inode)
750 obj = yaffs_InodeToObject(inode);
753 ("yaffs_clear_inode: ino %d, count %d %s\n", (int)inode->i_ino,
754 atomic_read(&inode->i_count),
755 obj ? "object exists" : "null object"));
759 yaffs_GrossLock(dev);
761 /* Clear the association between the inode and
765 yaffs_InodeToObjectLV(inode) = NULL;
767 /* If the object freeing was deferred, then the real
769 * This should fix the inode inconsistency problem.
772 yaffs_HandleDeferedFree(obj);
774 yaffs_GrossUnlock(dev);
779 /* delete is called when the link count is zero and the inode
780 * is put (ie. nobody wants to know about it anymore, time to
782 * NB Must call clear_inode()
784 static void yaffs_delete_inode(struct inode *inode)
786 yaffs_Object *obj = yaffs_InodeToObject(inode);
790 ("yaffs_delete_inode: ino %d, count %d %s\n", (int)inode->i_ino,
791 atomic_read(&inode->i_count),
792 obj ? "object exists" : "null object"));
796 yaffs_GrossLock(dev);
797 yaffs_DeleteObject(obj);
798 yaffs_GrossUnlock(dev);
800 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 13))
801 truncate_inode_pages(&inode->i_data, 0);
806 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 17))
807 static int yaffs_file_flush(struct file *file, fl_owner_t id)
809 static int yaffs_file_flush(struct file *file)
812 yaffs_Object *obj = yaffs_DentryToObject(file->f_dentry);
814 yaffs_Device *dev = obj->myDev;
817 ("yaffs_file_flush object %d (%s)\n", obj->objectId,
818 obj->dirty ? "dirty" : "clean"));
820 yaffs_GrossLock(dev);
822 yaffs_FlushFile(obj, 1, 0);
824 yaffs_GrossUnlock(dev);
829 static int yaffs_readpage_nolock(struct file *f, struct page *pg)
831 /* Lifted from jffs2 */
834 unsigned char *pg_buf;
839 T(YAFFS_TRACE_OS, ("yaffs_readpage_nolock at %08x, size %08x\n",
840 (unsigned)(pg->index << PAGE_CACHE_SHIFT),
841 (unsigned)PAGE_CACHE_SIZE));
843 obj = yaffs_DentryToObject(f->f_dentry);
847 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0))
848 BUG_ON(!PageLocked(pg));
855 /* FIXME: Can kmap fail? */
857 yaffs_GrossLock(dev);
859 ret = yaffs_ReadDataFromFile(obj, pg_buf,
860 pg->index << PAGE_CACHE_SHIFT,
863 yaffs_GrossUnlock(dev);
869 ClearPageUptodate(pg);
876 flush_dcache_page(pg);
879 T(YAFFS_TRACE_OS, ("yaffs_readpage_nolock done\n"));
883 static int yaffs_readpage_unlock(struct file *f, struct page *pg)
885 int ret = yaffs_readpage_nolock(f, pg);
890 static int yaffs_readpage(struct file *f, struct page *pg)
894 T(YAFFS_TRACE_OS, ("yaffs_readpage\n"));
895 ret=yaffs_readpage_unlock(f, pg);
896 T(YAFFS_TRACE_OS, ("yaffs_readpage done\n"));
900 /* writepage inspired by/stolen from smbfs */
902 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0))
903 static int yaffs_writepage(struct page *page, struct writeback_control *wbc)
905 static int yaffs_writepage(struct page *page)
908 struct address_space *mapping = page->mapping;
910 unsigned long end_index;
919 inode = mapping->host;
922 i_size = i_size_read(inode);
924 end_index = i_size >> PAGE_CACHE_SHIFT;
926 if(page->index < end_index)
927 nBytes = PAGE_CACHE_SIZE;
929 nBytes = i_size & (PAGE_CACHE_SIZE -1);
931 if (page->index > end_index || !nBytes) {
933 ("yaffs_writepage at %08x, inode size = %08x!!!\n",
934 (unsigned)(page->index << PAGE_CACHE_SHIFT),
935 (unsigned)inode->i_size));
937 (" -> don't care!!\n"));
939 zero_user_segment(page,0,PAGE_CACHE_SIZE);
940 set_page_writeback(page);
942 end_page_writeback(page);
947 if(nBytes != PAGE_CACHE_SIZE)
948 zero_user_segment(page,nBytes,PAGE_CACHE_SIZE);
954 obj = yaffs_InodeToObject(inode);
955 yaffs_GrossLock(obj->myDev);
958 ("yaffs_writepage at %08x, size %08x\n",
959 (unsigned)(page->index << PAGE_CACHE_SHIFT), nBytes));
961 ("writepag0: obj = %05x, ino = %05x\n",
962 (int)obj->variant.fileVariant.fileSize, (int)inode->i_size));
964 nWritten = yaffs_WriteDataToFile(obj, buffer,
965 page->index << PAGE_CACHE_SHIFT, nBytes, 0);
968 ("writepag1: obj = %05x, ino = %05x\n",
969 (int)obj->variant.fileVariant.fileSize, (int)inode->i_size));
971 yaffs_GrossUnlock(obj->myDev);
974 set_page_writeback(page);
976 end_page_writeback(page);
979 return (nWritten == nBytes) ? 0 : -ENOSPC;
983 #if (YAFFS_USE_WRITE_BEGIN_END > 0)
984 static int yaffs_write_begin(struct file *filp, struct address_space *mapping,
985 loff_t pos, unsigned len, unsigned flags,
986 struct page **pagep, void **fsdata)
988 struct page *pg = NULL;
989 pgoff_t index = pos >> PAGE_CACHE_SHIFT;
995 #if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 28)
996 pg = grab_cache_page_write_begin(mapping, index, flags);
998 pg = __grab_cache_page(mapping, index);
1006 T(YAFFS_TRACE_OS, ("start yaffs_write_begin index %d(%x) uptodate %d\n",(int)index,(int)index,Page_Uptodate(pg) ? 1 : 0));
1009 space_held = yaffs_hold_space(filp);
1016 /* Update page if required */
1018 if (!Page_Uptodate(pg))
1019 ret = yaffs_readpage_nolock(filp, pg);
1024 /* Happy path return */
1025 T(YAFFS_TRACE_OS, ("end yaffs_write_begin - ok\n"));
1030 T(YAFFS_TRACE_OS, ("end yaffs_write_begin fail returning %d\n", ret));
1032 yaffs_release_space(filp);
1035 page_cache_release(pg);
1042 static int yaffs_prepare_write(struct file *f, struct page *pg,
1043 unsigned offset, unsigned to)
1045 T(YAFFS_TRACE_OS, ("yaffs_prepair_write\n"));
1047 if (!Page_Uptodate(pg))
1048 return yaffs_readpage_nolock(f, pg);
1053 #if (YAFFS_USE_WRITE_BEGIN_END > 0)
1054 static int yaffs_write_end(struct file *filp, struct address_space *mapping,
1055 loff_t pos, unsigned len, unsigned copied,
1056 struct page *pg, void *fsdadata)
1060 uint32_t offset_into_page = pos & (PAGE_CACHE_SIZE - 1);
1063 addr = kva + offset_into_page;
1066 ("yaffs_write_end addr %x pos %x nBytes %d\n",
1070 ret = yaffs_file_write(filp, addr, copied, &pos);
1072 if (ret != copied) {
1074 ("yaffs_write_end not same size ret %d copied %d\n",
1083 yaffs_release_space(filp);
1085 page_cache_release(pg);
1090 static int yaffs_commit_write(struct file *f, struct page *pg, unsigned offset,
1095 loff_t pos = (((loff_t) pg->index) << PAGE_CACHE_SHIFT) + offset;
1096 int nBytes = to - offset;
1099 unsigned spos = pos;
1103 addr = kva + offset;
1105 saddr = (unsigned) addr;
1108 ("yaffs_commit_write addr %x pos %x nBytes %d\n",
1109 saddr, spos, nBytes));
1111 nWritten = yaffs_file_write(f, addr, nBytes, &pos);
1113 if (nWritten != nBytes) {
1115 ("yaffs_commit_write not same size nWritten %d nBytes %d\n",
1125 ("yaffs_commit_write returning %d\n",
1126 nWritten == nBytes ? 0 : nWritten));
1128 return nWritten == nBytes ? 0 : nWritten;
1133 static void yaffs_FillInodeFromObject(struct inode *inode, yaffs_Object *obj)
1138 /* Check mode against the variant type and attempt to repair if broken. */
1139 __u32 mode = obj->yst_mode;
1140 switch (obj->variantType) {
1141 case YAFFS_OBJECT_TYPE_FILE:
1142 if (!S_ISREG(mode)) {
1143 obj->yst_mode &= ~S_IFMT;
1144 obj->yst_mode |= S_IFREG;
1148 case YAFFS_OBJECT_TYPE_SYMLINK:
1149 if (!S_ISLNK(mode)) {
1150 obj->yst_mode &= ~S_IFMT;
1151 obj->yst_mode |= S_IFLNK;
1155 case YAFFS_OBJECT_TYPE_DIRECTORY:
1156 if (!S_ISDIR(mode)) {
1157 obj->yst_mode &= ~S_IFMT;
1158 obj->yst_mode |= S_IFDIR;
1162 case YAFFS_OBJECT_TYPE_UNKNOWN:
1163 case YAFFS_OBJECT_TYPE_HARDLINK:
1164 case YAFFS_OBJECT_TYPE_SPECIAL:
1170 inode->i_flags |= S_NOATIME;
1172 inode->i_ino = obj->objectId;
1173 inode->i_mode = obj->yst_mode;
1174 inode->i_uid = obj->yst_uid;
1175 inode->i_gid = obj->yst_gid;
1176 #if (LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 19))
1177 inode->i_blksize = inode->i_sb->s_blocksize;
1179 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0))
1181 inode->i_rdev = old_decode_dev(obj->yst_rdev);
1182 inode->i_atime.tv_sec = (time_t) (obj->yst_atime);
1183 inode->i_atime.tv_nsec = 0;
1184 inode->i_mtime.tv_sec = (time_t) obj->yst_mtime;
1185 inode->i_mtime.tv_nsec = 0;
1186 inode->i_ctime.tv_sec = (time_t) obj->yst_ctime;
1187 inode->i_ctime.tv_nsec = 0;
1189 inode->i_rdev = obj->yst_rdev;
1190 inode->i_atime = obj->yst_atime;
1191 inode->i_mtime = obj->yst_mtime;
1192 inode->i_ctime = obj->yst_ctime;
1194 inode->i_size = yaffs_GetObjectFileLength(obj);
1195 inode->i_blocks = (inode->i_size + 511) >> 9;
1197 inode->i_nlink = yaffs_GetObjectLinkCount(obj);
1200 ("yaffs_FillInode mode %x uid %d gid %d size %d count %d\n",
1201 inode->i_mode, inode->i_uid, inode->i_gid,
1202 (int)inode->i_size, atomic_read(&inode->i_count)));
1204 switch (obj->yst_mode & S_IFMT) {
1205 default: /* fifo, device or socket */
1206 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0))
1207 init_special_inode(inode, obj->yst_mode,
1208 old_decode_dev(obj->yst_rdev));
1210 init_special_inode(inode, obj->yst_mode,
1211 (dev_t) (obj->yst_rdev));
1214 case S_IFREG: /* file */
1215 inode->i_op = &yaffs_file_inode_operations;
1216 inode->i_fop = &yaffs_file_operations;
1217 inode->i_mapping->a_ops =
1218 &yaffs_file_address_operations;
1220 case S_IFDIR: /* directory */
1221 inode->i_op = &yaffs_dir_inode_operations;
1222 inode->i_fop = &yaffs_dir_operations;
1224 case S_IFLNK: /* symlink */
1225 inode->i_op = &yaffs_symlink_inode_operations;
1229 yaffs_InodeToObjectLV(inode) = obj;
1231 obj->myInode = inode;
1235 ("yaffs_FileInode invalid parameters\n"));
1240 struct inode *yaffs_get_inode(struct super_block *sb, int mode, int dev,
1243 struct inode *inode;
1247 ("yaffs_get_inode for NULL super_block!!\n"));
1254 ("yaffs_get_inode for NULL object!!\n"));
1260 ("yaffs_get_inode for object %d\n", obj->objectId));
1262 inode = Y_IGET(sb, obj->objectId);
1266 /* NB Side effect: iget calls back to yaffs_read_inode(). */
1267 /* iget also increments the inode's i_count */
1268 /* NB You can't be holding grossLock or deadlock will happen! */
1273 static ssize_t yaffs_file_write(struct file *f, const char *buf, size_t n,
1278 struct inode *inode;
1281 obj = yaffs_DentryToObject(f->f_dentry);
1285 yaffs_GrossLock(dev);
1287 inode = f->f_dentry->d_inode;
1289 if (!S_ISBLK(inode->i_mode) && f->f_flags & O_APPEND)
1290 ipos = inode->i_size;
1296 ("yaffs_file_write: hey obj is null!\n"));
1299 ("yaffs_file_write about to write writing %u(%x) bytes"
1300 "to object %d at %d(%x)\n",
1301 (unsigned) n, (unsigned) n, obj->objectId, ipos,ipos));
1303 nWritten = yaffs_WriteDataToFile(obj, buf, ipos, n, 0);
1306 ("yaffs_file_write: %d(%x) bytes written\n",
1307 (unsigned )n,(unsigned)n));
1312 if (ipos > inode->i_size) {
1313 inode->i_size = ipos;
1314 inode->i_blocks = (ipos + 511) >> 9;
1317 ("yaffs_file_write size updated to %d bytes, "
1319 ipos, (int)(inode->i_blocks)));
1323 yaffs_GrossUnlock(dev);
1324 return (nWritten == 0) && (n > 0) ? -ENOSPC : nWritten;
1327 /* Space holding and freeing is done to ensure we have space available for write_begin/end */
1328 /* For now we just assume few parallel writes and check against a small number. */
1329 /* Todo: need to do this with a counter to handle parallel reads better */
1331 static ssize_t yaffs_hold_space(struct file *f)
1339 obj = yaffs_DentryToObject(f->f_dentry);
1343 yaffs_GrossLock(dev);
1345 nFreeChunks = yaffs_GetNumberOfFreeChunks(dev);
1347 yaffs_GrossUnlock(dev);
1349 return (nFreeChunks > 20) ? 1 : 0;
1352 static void yaffs_release_space(struct file *f)
1358 obj = yaffs_DentryToObject(f->f_dentry);
1362 yaffs_GrossLock(dev);
1365 yaffs_GrossUnlock(dev);
1369 static loff_t yaffs_dir_llseek(struct file *file, loff_t offset, int origin)
1377 offset += i_size_read(file->f_path.dentry->d_inode);
1380 offset += file->f_pos;
1385 if (offset != file->f_pos)
1386 file->f_pos = offset;
1395 static int yaffs_readdir(struct file *f, void *dirent, filldir_t filldir)
1399 struct yaffs_SearchContext *sc;
1400 struct inode *inode = f->f_dentry->d_inode;
1401 unsigned long offset, curoffs;
1405 char name[YAFFS_MAX_NAME_LENGTH + 1];
1407 obj = yaffs_DentryToObject(f->f_dentry);
1410 yaffs_GrossLock(dev);
1412 yaffs_DeviceToContext(dev)->readdirProcess = current;
1416 sc = yaffs_NewSearch(obj);
1422 T(YAFFS_TRACE_OS, ("yaffs_readdir: starting at %d\n", (int)offset));
1426 ("yaffs_readdir: entry . ino %d \n",
1427 (int)inode->i_ino));
1428 yaffs_GrossUnlock(dev);
1429 if (filldir(dirent, ".", 1, offset, inode->i_ino, DT_DIR) < 0)
1431 yaffs_GrossLock(dev);
1437 ("yaffs_readdir: entry .. ino %d \n",
1438 (int)f->f_dentry->d_parent->d_inode->i_ino));
1439 yaffs_GrossUnlock(dev);
1440 if (filldir(dirent, "..", 2, offset,
1441 f->f_dentry->d_parent->d_inode->i_ino, DT_DIR) < 0)
1443 yaffs_GrossLock(dev);
1450 /* If the directory has changed since the open or last call to
1451 readdir, rewind to after the 2 canned entries. */
1452 if (f->f_version != inode->i_version) {
1455 f->f_version = inode->i_version;
1458 while(sc->nextReturn){
1461 if (curoffs >= offset) {
1462 int this_inode = yaffs_GetObjectInode(l);
1463 int this_type = yaffs_GetObjectType(l);
1465 yaffs_GetObjectName(l, name,
1466 YAFFS_MAX_NAME_LENGTH + 1);
1468 ("yaffs_readdir: %s inode %d\n", name,
1469 yaffs_GetObjectInode(l)));
1471 yaffs_GrossUnlock(dev);
1481 yaffs_GrossLock(dev);
1486 yaffs_SearchAdvance(sc);
1490 yaffs_DeviceToContext(dev)->readdirProcess = NULL;
1492 yaffs_GrossUnlock(dev);
1494 yaffs_EndSearch(sc);
1502 * File creation. Allocate an inode, and we're done..
1505 #if LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 29)
1508 #define YCRED(x) (x->cred)
1511 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0))
1512 static int yaffs_mknod(struct inode *dir, struct dentry *dentry, int mode,
1515 static int yaffs_mknod(struct inode *dir, struct dentry *dentry, int mode,
1519 struct inode *inode;
1521 yaffs_Object *obj = NULL;
1524 yaffs_Object *parent = yaffs_InodeToObject(dir);
1526 int error = -ENOSPC;
1527 uid_t uid = YCRED(current)->fsuid;
1528 gid_t gid = (dir->i_mode & S_ISGID) ? dir->i_gid : YCRED(current)->fsgid;
1530 if ((dir->i_mode & S_ISGID) && S_ISDIR(mode))
1535 ("yaffs_mknod: parent object %d type %d\n",
1536 parent->objectId, parent->variantType));
1539 ("yaffs_mknod: could not get parent object\n"));
1543 T(YAFFS_TRACE_OS, ("yaffs_mknod: making oject for %s, "
1545 dentry->d_name.name, mode, rdev));
1547 dev = parent->myDev;
1549 yaffs_GrossLock(dev);
1551 switch (mode & S_IFMT) {
1553 /* Special (socket, fifo, device...) */
1554 T(YAFFS_TRACE_OS, ("yaffs_mknod: making special\n"));
1555 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0))
1556 obj = yaffs_MknodSpecial(parent, dentry->d_name.name, mode, uid,
1557 gid, old_encode_dev(rdev));
1559 obj = yaffs_MknodSpecial(parent, dentry->d_name.name, mode, uid,
1563 case S_IFREG: /* file */
1564 T(YAFFS_TRACE_OS, ("yaffs_mknod: making file\n"));
1565 obj = yaffs_MknodFile(parent, dentry->d_name.name, mode, uid,
1568 case S_IFDIR: /* directory */
1570 ("yaffs_mknod: making directory\n"));
1571 obj = yaffs_MknodDirectory(parent, dentry->d_name.name, mode,
1574 case S_IFLNK: /* symlink */
1575 T(YAFFS_TRACE_OS, ("yaffs_mknod: making symlink\n"));
1576 obj = NULL; /* Do we ever get here? */
1580 /* Can not call yaffs_get_inode() with gross lock held */
1581 yaffs_GrossUnlock(dev);
1584 inode = yaffs_get_inode(dir->i_sb, mode, rdev, obj);
1585 d_instantiate(dentry, inode);
1586 update_dir_time(dir);
1588 ("yaffs_mknod created object %d count = %d\n",
1589 obj->objectId, atomic_read(&inode->i_count)));
1591 yaffs_FillInodeFromObject(dir,parent);
1594 ("yaffs_mknod failed making object\n"));
1601 static int yaffs_mkdir(struct inode *dir, struct dentry *dentry, int mode)
1604 T(YAFFS_TRACE_OS, ("yaffs_mkdir\n"));
1605 retVal = yaffs_mknod(dir, dentry, mode | S_IFDIR, 0);
1609 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0))
1610 static int yaffs_create(struct inode *dir, struct dentry *dentry, int mode,
1611 struct nameidata *n)
1613 static int yaffs_create(struct inode *dir, struct dentry *dentry, int mode)
1616 T(YAFFS_TRACE_OS, ("yaffs_create\n"));
1617 return yaffs_mknod(dir, dentry, mode | S_IFREG, 0);
1620 static int yaffs_unlink(struct inode *dir, struct dentry *dentry)
1628 ("yaffs_unlink %d:%s\n", (int)(dir->i_ino),
1629 dentry->d_name.name));
1630 obj = yaffs_InodeToObject(dir);
1633 yaffs_GrossLock(dev);
1635 retVal = yaffs_Unlink(obj, dentry->d_name.name);
1637 if (retVal == YAFFS_OK) {
1638 dentry->d_inode->i_nlink--;
1640 yaffs_GrossUnlock(dev);
1641 mark_inode_dirty(dentry->d_inode);
1642 update_dir_time(dir);
1645 yaffs_GrossUnlock(dev);
1652 static int yaffs_link(struct dentry *old_dentry, struct inode *dir,
1653 struct dentry *dentry)
1655 struct inode *inode = old_dentry->d_inode;
1656 yaffs_Object *obj = NULL;
1657 yaffs_Object *link = NULL;
1660 T(YAFFS_TRACE_OS, ("yaffs_link\n"));
1662 obj = yaffs_InodeToObject(inode);
1665 yaffs_GrossLock(dev);
1667 if (!S_ISDIR(inode->i_mode)) /* Don't link directories */
1668 link = yaffs_Link(yaffs_InodeToObject(dir), dentry->d_name.name,
1672 old_dentry->d_inode->i_nlink = yaffs_GetObjectLinkCount(obj);
1673 d_instantiate(dentry, old_dentry->d_inode);
1674 atomic_inc(&old_dentry->d_inode->i_count);
1676 ("yaffs_link link count %d i_count %d\n",
1677 old_dentry->d_inode->i_nlink,
1678 atomic_read(&old_dentry->d_inode->i_count)));
1681 yaffs_GrossUnlock(dev);
1684 update_dir_time(dir);
1691 static int yaffs_symlink(struct inode *dir, struct dentry *dentry,
1692 const char *symname)
1696 uid_t uid = YCRED(current)->fsuid;
1697 gid_t gid = (dir->i_mode & S_ISGID) ? dir->i_gid : YCRED(current)->fsgid;
1699 T(YAFFS_TRACE_OS, ("yaffs_symlink\n"));
1701 dev = yaffs_InodeToObject(dir)->myDev;
1702 yaffs_GrossLock(dev);
1703 obj = yaffs_MknodSymLink(yaffs_InodeToObject(dir), dentry->d_name.name,
1704 S_IFLNK | S_IRWXUGO, uid, gid, symname);
1705 yaffs_GrossUnlock(dev);
1708 struct inode *inode;
1710 inode = yaffs_get_inode(dir->i_sb, obj->yst_mode, 0, obj);
1711 d_instantiate(dentry, inode);
1712 update_dir_time(dir);
1713 T(YAFFS_TRACE_OS, ("symlink created OK\n"));
1716 T(YAFFS_TRACE_OS, ("symlink not created\n"));
1722 static int yaffs_sync_object(struct file *file, struct dentry *dentry,
1729 obj = yaffs_DentryToObject(dentry);
1733 T(YAFFS_TRACE_OS | YAFFS_TRACE_SYNC, ("yaffs_sync_object\n"));
1734 yaffs_GrossLock(dev);
1735 yaffs_FlushFile(obj, 1, datasync);
1736 yaffs_GrossUnlock(dev);
1741 * The VFS layer already does all the dentry stuff for rename.
1743 * NB: POSIX says you can rename an object over an old object of the same name
1745 static int yaffs_rename(struct inode *old_dir, struct dentry *old_dentry,
1746 struct inode *new_dir, struct dentry *new_dentry)
1749 int retVal = YAFFS_FAIL;
1750 yaffs_Object *target;
1752 T(YAFFS_TRACE_OS, ("yaffs_rename\n"));
1753 dev = yaffs_InodeToObject(old_dir)->myDev;
1755 yaffs_GrossLock(dev);
1757 /* Check if the target is an existing directory that is not empty. */
1758 target = yaffs_FindObjectByName(yaffs_InodeToObject(new_dir),
1759 new_dentry->d_name.name);
1763 if (target && target->variantType == YAFFS_OBJECT_TYPE_DIRECTORY &&
1764 !ylist_empty(&target->variant.directoryVariant.children)) {
1766 T(YAFFS_TRACE_OS, ("target is non-empty dir\n"));
1768 retVal = YAFFS_FAIL;
1770 /* Now does unlinking internally using shadowing mechanism */
1771 T(YAFFS_TRACE_OS, ("calling yaffs_RenameObject\n"));
1773 retVal = yaffs_RenameObject(yaffs_InodeToObject(old_dir),
1774 old_dentry->d_name.name,
1775 yaffs_InodeToObject(new_dir),
1776 new_dentry->d_name.name);
1778 yaffs_GrossUnlock(dev);
1780 if (retVal == YAFFS_OK) {
1782 new_dentry->d_inode->i_nlink--;
1783 mark_inode_dirty(new_dentry->d_inode);
1786 update_dir_time(old_dir);
1787 if(old_dir != new_dir)
1788 update_dir_time(new_dir);
1795 static int yaffs_setattr(struct dentry *dentry, struct iattr *attr)
1797 struct inode *inode = dentry->d_inode;
1802 ("yaffs_setattr of object %d\n",
1803 yaffs_InodeToObject(inode)->objectId));
1805 /* Fail if a requested resize >= 2GB */
1806 if (attr->ia_valid & ATTR_SIZE &&
1807 (attr->ia_size >> 31))
1811 error = inode_change_ok(inode, attr);
1815 error = inode_setattr(inode, attr);
1816 T(YAFFS_TRACE_OS,("inode_setattr called\n"));
1817 if (attr->ia_valid & ATTR_SIZE)
1818 truncate_inode_pages(&inode->i_data,attr->ia_size);
1820 dev = yaffs_InodeToObject(inode)->myDev;
1821 if (attr->ia_valid & ATTR_SIZE){
1822 T(YAFFS_TRACE_OS,("resize to %d(%x)\n",(int)(attr->ia_size),(int)(attr->ia_size)));
1824 yaffs_GrossLock(dev);
1825 result = yaffs_SetAttributes(yaffs_InodeToObject(inode), attr);
1826 if(result == YAFFS_OK) {
1831 yaffs_GrossUnlock(dev);
1836 ("yaffs_setattr done returning %d\n",error));
1841 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 17))
1842 static int yaffs_statfs(struct dentry *dentry, struct kstatfs *buf)
1844 yaffs_Device *dev = yaffs_DentryToObject(dentry)->myDev;
1845 struct super_block *sb = dentry->d_sb;
1846 #elif (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0))
1847 static int yaffs_statfs(struct super_block *sb, struct kstatfs *buf)
1849 yaffs_Device *dev = yaffs_SuperToDevice(sb);
1851 static int yaffs_statfs(struct super_block *sb, struct statfs *buf)
1853 yaffs_Device *dev = yaffs_SuperToDevice(sb);
1856 T(YAFFS_TRACE_OS, ("yaffs_statfs\n"));
1858 yaffs_GrossLock(dev);
1860 buf->f_type = YAFFS_MAGIC;
1861 buf->f_bsize = sb->s_blocksize;
1862 buf->f_namelen = 255;
1864 if (dev->nDataBytesPerChunk & (dev->nDataBytesPerChunk - 1)) {
1865 /* Do this if chunk size is not a power of 2 */
1867 uint64_t bytesInDev;
1870 bytesInDev = ((uint64_t)((dev->param.endBlock - dev->param.startBlock + 1))) *
1871 ((uint64_t)(dev->param.nChunksPerBlock * dev->nDataBytesPerChunk));
1873 do_div(bytesInDev, sb->s_blocksize); /* bytesInDev becomes the number of blocks */
1874 buf->f_blocks = bytesInDev;
1876 bytesFree = ((uint64_t)(yaffs_GetNumberOfFreeChunks(dev))) *
1877 ((uint64_t)(dev->nDataBytesPerChunk));
1879 do_div(bytesFree, sb->s_blocksize);
1881 buf->f_bfree = bytesFree;
1883 } else if (sb->s_blocksize > dev->nDataBytesPerChunk) {
1886 (dev->param.endBlock - dev->param.startBlock + 1) *
1887 dev->param.nChunksPerBlock /
1888 (sb->s_blocksize / dev->nDataBytesPerChunk);
1890 yaffs_GetNumberOfFreeChunks(dev) /
1891 (sb->s_blocksize / dev->nDataBytesPerChunk);
1894 (dev->param.endBlock - dev->param.startBlock + 1) *
1895 dev->param.nChunksPerBlock *
1896 (dev->nDataBytesPerChunk / sb->s_blocksize);
1899 yaffs_GetNumberOfFreeChunks(dev) *
1900 (dev->nDataBytesPerChunk / sb->s_blocksize);
1905 buf->f_bavail = buf->f_bfree;
1907 yaffs_GrossUnlock(dev);
1913 static void yaffs_FlushInodes(struct super_block *sb)
1918 list_for_each_entry(iptr,&sb->s_inodes, i_sb_list){
1919 obj = yaffs_InodeToObject(iptr);
1921 T(YAFFS_TRACE_OS, ("flushing obj %d\n",obj->objectId));
1922 yaffs_FlushFile(obj,1,0);
1928 static void yaffs_FlushSuperBlock(struct super_block *sb, int do_checkpoint)
1930 yaffs_Device *dev = yaffs_SuperToDevice(sb);
1934 yaffs_FlushInodes(sb);
1935 yaffs_UpdateDirtyDirectories(dev);
1936 yaffs_FlushEntireDeviceCache(dev);
1938 yaffs_CheckpointSave(dev);
1941 static int yaffs_do_sync_fs(struct super_block *sb, int do_checkpoint)
1944 yaffs_Device *dev = yaffs_SuperToDevice(sb);
1945 unsigned int oneshot_checkpoint = (yaffs_auto_checkpoint & 4);
1947 T(YAFFS_TRACE_OS | YAFFS_TRACE_SYNC,
1948 ("yaffs_do_sync_fs: %s %s%s\n",
1949 sb->s_dirt ? "dirty" : "clean",
1950 do_checkpoint ? "with checkpoint" : "no checkpoint",
1951 oneshot_checkpoint ? " one-shot" : "" ));
1953 if (sb->s_dirt || oneshot_checkpoint) {
1954 yaffs_GrossLock(dev);
1955 yaffs_FlushSuperBlock(sb,do_checkpoint);
1956 yaffs_GrossUnlock(dev);
1960 if(oneshot_checkpoint)
1961 yaffs_auto_checkpoint &= ~4;
1967 * yaffs background thread functions .
1968 * yaffs_BackgroundThread() the thread function
1969 * yaffs_BackgroundStart() launches the background thread.
1970 * yaffs_BackgroundStop() cleans up the background thread.
1973 * The thread should only run after the yaffs is initialised
1974 * The thread should be stopped before yaffs is unmounted.
1975 * The thread should not do any writing while the fs is in read only.
1978 #ifdef YAFFS_COMPILE_BACKGROUND
1979 static int yaffs_BackgroundThread(void *data)
1981 yaffs_Device *dev = (yaffs_Device *)data;
1982 struct yaffs_LinuxContext *context = yaffs_DeviceToContext(dev);
1984 T(YAFFS_TRACE_BACKGROUND,
1985 ("yaffs_background starting for dev %p\n",
1988 while(context->bgRunning){
1989 T(YAFFS_TRACE_BACKGROUND,
1990 ("yaffs_background\n"));
1992 if(kthread_should_stop())
1994 yaffs_GrossLock(dev);
1995 yaffs_UpdateDirtyDirectories(dev);
1996 yaffs_GrossUnlock(dev);
2002 static int yaffs_BackgroundStart(yaffs_Device *dev)
2006 struct yaffs_LinuxContext *context = yaffs_DeviceToContext(dev);
2008 context->bgRunning = 1;
2010 context->bgThread = kthread_run(yaffs_BackgroundThread,(void *)dev,"yaffs_%x",(unsigned)dev);
2012 if(IS_ERR(context->bgThread)){
2013 retval = PTR_ERR(context->bgThread);
2014 context->bgThread = NULL;
2015 context->bgRunning = 0;
2020 static void yaffs_BackgroundStop(yaffs_Device *dev)
2022 struct yaffs_LinuxContext *ctxt = yaffs_DeviceToContext(dev);
2024 ctxt->bgRunning = 0;
2026 if( ctxt->bgThread){
2027 kthread_stop(ctxt->bgThread);
2028 ctxt->bgThread = NULL;
2032 static int yaffs_BackgroundThread(void *data)
2037 static int yaffs_BackgroundStart(yaffs_Device *dev)
2042 static void yaffs_BackgroundStop(yaffs_Device *dev)
2048 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 17))
2049 static void yaffs_write_super(struct super_block *sb)
2051 static int yaffs_write_super(struct super_block *sb)
2055 T(YAFFS_TRACE_OS | YAFFS_TRACE_SYNC, ("yaffs_write_super\n"));
2056 yaffs_do_sync_fs(sb, yaffs_auto_checkpoint >= 2);
2058 #if (LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 18))
2064 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 17))
2065 static int yaffs_sync_fs(struct super_block *sb, int wait)
2067 static int yaffs_sync_fs(struct super_block *sb)
2070 T(YAFFS_TRACE_OS | YAFFS_TRACE_SYNC, ("yaffs_sync_fs\n"));
2072 yaffs_do_sync_fs(sb,yaffs_auto_checkpoint >= 1);
2077 #ifdef YAFFS_USE_OWN_IGET
2079 static struct inode *yaffs_iget(struct super_block *sb, unsigned long ino)
2081 struct inode *inode;
2083 yaffs_Device *dev = yaffs_SuperToDevice(sb);
2086 ("yaffs_iget for %lu\n", ino));
2088 inode = iget_locked(sb, ino);
2090 return ERR_PTR(-ENOMEM);
2091 if (!(inode->i_state & I_NEW))
2094 /* NB This is called as a side effect of other functions, but
2095 * we had to release the lock to prevent deadlocks, so
2096 * need to lock again.
2099 yaffs_GrossLock(dev);
2101 obj = yaffs_FindObjectByNumber(dev, inode->i_ino);
2103 yaffs_FillInodeFromObject(inode, obj);
2105 yaffs_GrossUnlock(dev);
2107 unlock_new_inode(inode);
2113 static void yaffs_read_inode(struct inode *inode)
2115 /* NB This is called as a side effect of other functions, but
2116 * we had to release the lock to prevent deadlocks, so
2117 * need to lock again.
2121 yaffs_Device *dev = yaffs_SuperToDevice(inode->i_sb);
2124 ("yaffs_read_inode for %d\n", (int)inode->i_ino));
2126 if(current != yaffs_DeviceToContext(dev)->readdirProcess)
2127 yaffs_GrossLock(dev);
2129 obj = yaffs_FindObjectByNumber(dev, inode->i_ino);
2131 yaffs_FillInodeFromObject(inode, obj);
2133 if(current != yaffs_DeviceToContext(dev)->readdirProcess)
2134 yaffs_GrossUnlock(dev);
2139 static YLIST_HEAD(yaffs_context_list);
2140 struct semaphore yaffs_context_lock;
2142 #if 0 /* not used */
2143 static int yaffs_remount_fs(struct super_block *sb, int *flags, char *data)
2145 yaffs_Device *dev = yaffs_SuperToDevice(sb);
2147 if (*flags & MS_RDONLY) {
2148 struct mtd_info *mtd = yaffs_SuperToDevice(sb)->genericDevice;
2151 ("yaffs_remount_fs: %s: RO\n", dev->name));
2153 yaffs_GrossLock(dev);
2155 yaffs_FlushSuperBlock(sb,1);
2160 yaffs_GrossUnlock(dev);
2163 ("yaffs_remount_fs: %s: RW\n", dev->name));
2170 static void yaffs_put_super(struct super_block *sb)
2172 yaffs_Device *dev = yaffs_SuperToDevice(sb);
2174 T(YAFFS_TRACE_OS, ("yaffs_put_super\n"));
2176 yaffs_GrossLock(dev);
2178 yaffs_FlushSuperBlock(sb,1);
2180 if (yaffs_DeviceToContext(dev)->putSuperFunc)
2181 yaffs_DeviceToContext(dev)->putSuperFunc(sb);
2183 yaffs_BackgroundStop(dev);
2185 yaffs_Deinitialise(dev);
2187 yaffs_GrossUnlock(dev);
2189 down(&yaffs_context_lock);
2190 ylist_del_init(&(yaffs_DeviceToContext(dev)->contextList));
2191 up(&yaffs_context_lock);
2193 if (yaffs_DeviceToContext(dev)->spareBuffer) {
2194 YFREE(yaffs_DeviceToContext(dev)->spareBuffer);
2195 yaffs_DeviceToContext(dev)->spareBuffer = NULL;
2202 static void yaffs_MTDPutSuper(struct super_block *sb)
2204 struct mtd_info *mtd = yaffs_DeviceToContext(yaffs_SuperToDevice(sb))->mtd;
2209 put_mtd_device(mtd);
2213 static void yaffs_MarkSuperBlockDirty(yaffs_Device *dev)
2215 struct super_block *sb = yaffs_DeviceToContext(dev)->superBlock;
2217 T(YAFFS_TRACE_OS, ("yaffs_MarkSuperBlockDirty() sb = %p\n", sb));
2224 int skip_checkpoint_read;
2225 int skip_checkpoint_write;
2228 int tags_ecc_overridden;
2229 int lazy_loading_enabled;
2230 int lazy_loading_overridden;
2231 int empty_lost_and_found;
2232 int empty_lost_and_found_overridden;
2235 #define MAX_OPT_LEN 30
2236 static int yaffs_parse_options(yaffs_options *options, const char *options_str)
2238 char cur_opt[MAX_OPT_LEN + 1];
2242 /* Parse through the options which is a comma seperated list */
2244 while (options_str && *options_str && !error) {
2245 memset(cur_opt, 0, MAX_OPT_LEN + 1);
2248 while(*options_str == ',')
2251 while (*options_str && *options_str != ',') {
2252 if (p < MAX_OPT_LEN) {
2253 cur_opt[p] = *options_str;
2259 if (!strcmp(cur_opt, "inband-tags"))
2260 options->inband_tags = 1;
2261 else if (!strcmp(cur_opt, "tags-ecc-off")){
2262 options->tags_ecc_on = 0;
2263 options->tags_ecc_overridden=1;
2264 } else if (!strcmp(cur_opt, "tags-ecc-on")){
2265 options->tags_ecc_on = 1;
2266 options->tags_ecc_overridden = 1;
2267 } else if (!strcmp(cur_opt, "lazy-loading-off")){
2268 options->lazy_loading_enabled = 0;
2269 options->lazy_loading_overridden=1;
2270 } else if (!strcmp(cur_opt, "lazy-loading-on")){
2271 options->lazy_loading_enabled = 1;
2272 options->lazy_loading_overridden = 1;
2273 } else if (!strcmp(cur_opt, "empty-lost-and-found-off")){
2274 options->empty_lost_and_found = 0;
2275 options->empty_lost_and_found_overridden=1;
2276 } else if (!strcmp(cur_opt, "empty-lost-and-found-on")){
2277 options->empty_lost_and_found = 1;
2278 options->empty_lost_and_found_overridden=1;
2279 } else if (!strcmp(cur_opt, "no-cache"))
2280 options->no_cache = 1;
2281 else if (!strcmp(cur_opt, "no-checkpoint-read"))
2282 options->skip_checkpoint_read = 1;
2283 else if (!strcmp(cur_opt, "no-checkpoint-write"))
2284 options->skip_checkpoint_write = 1;
2285 else if (!strcmp(cur_opt, "no-checkpoint")) {
2286 options->skip_checkpoint_read = 1;
2287 options->skip_checkpoint_write = 1;
2289 printk(KERN_INFO "yaffs: Bad mount option \"%s\"\n",
2298 static struct super_block *yaffs_internal_read_super(int yaffsVersion,
2299 struct super_block *sb,
2300 void *data, int silent)
2303 struct inode *inode = NULL;
2304 struct dentry *root;
2305 yaffs_Device *dev = 0;
2306 char devname_buf[BDEVNAME_SIZE + 1];
2307 struct mtd_info *mtd;
2309 char *data_str = (char *)data;
2310 struct yaffs_LinuxContext *context = NULL;
2311 yaffs_DeviceParam *param;
2313 yaffs_options options;
2315 sb->s_magic = YAFFS_MAGIC;
2316 sb->s_op = &yaffs_super_ops;
2317 sb->s_flags |= MS_NOATIME;
2319 #ifdef YAFFS_COMPILE_EXPORTFS
2320 sb->s_export_op = &yaffs_export_ops;
2324 printk(KERN_INFO "yaffs: sb is NULL\n");
2325 else if (!sb->s_dev)
2326 printk(KERN_INFO "yaffs: sb->s_dev is NULL\n");
2327 else if (!yaffs_devname(sb, devname_buf))
2328 printk(KERN_INFO "yaffs: devname is NULL\n");
2330 printk(KERN_INFO "yaffs: dev is %d name is \"%s\"\n",
2332 yaffs_devname(sb, devname_buf));
2337 printk(KERN_INFO "yaffs: passed flags \"%s\"\n", data_str);
2339 memset(&options, 0, sizeof(options));
2341 if (yaffs_parse_options(&options, data_str)) {
2342 /* Option parsing failed */
2347 sb->s_blocksize = PAGE_CACHE_SIZE;
2348 sb->s_blocksize_bits = PAGE_CACHE_SHIFT;
2349 T(YAFFS_TRACE_OS, ("yaffs_read_super: Using yaffs%d\n", yaffsVersion));
2351 ("yaffs_read_super: block size %d\n", (int)(sb->s_blocksize)));
2353 #ifdef CONFIG_YAFFS_DISABLE_WRITE_VERIFY
2355 ("yaffs: Write verification disabled. All guarantees "
2356 "null and void\n"));
2359 T(YAFFS_TRACE_ALWAYS, ("yaffs: Attempting MTD mount on %u.%u, "
2361 MAJOR(sb->s_dev), MINOR(sb->s_dev),
2362 yaffs_devname(sb, devname_buf)));
2364 /* Check it's an mtd device..... */
2365 if (MAJOR(sb->s_dev) != MTD_BLOCK_MAJOR)
2366 return NULL; /* This isn't an mtd device */
2368 /* Get the device */
2369 mtd = get_mtd_device(NULL, MINOR(sb->s_dev));
2371 T(YAFFS_TRACE_ALWAYS,
2372 ("yaffs: MTD device #%u doesn't appear to exist\n",
2376 /* Check it's NAND */
2377 if (mtd->type != MTD_NANDFLASH) {
2378 T(YAFFS_TRACE_ALWAYS,
2379 ("yaffs: MTD device is not NAND it's type %d\n", mtd->type));
2383 T(YAFFS_TRACE_OS, (" erase %p\n", mtd->erase));
2384 T(YAFFS_TRACE_OS, (" read %p\n", mtd->read));
2385 T(YAFFS_TRACE_OS, (" write %p\n", mtd->write));
2386 T(YAFFS_TRACE_OS, (" readoob %p\n", mtd->read_oob));
2387 T(YAFFS_TRACE_OS, (" writeoob %p\n", mtd->write_oob));
2388 T(YAFFS_TRACE_OS, (" block_isbad %p\n", mtd->block_isbad));
2389 T(YAFFS_TRACE_OS, (" block_markbad %p\n", mtd->block_markbad));
2390 T(YAFFS_TRACE_OS, (" %s %d\n", WRITE_SIZE_STR, WRITE_SIZE(mtd)));
2391 T(YAFFS_TRACE_OS, (" oobsize %d\n", mtd->oobsize));
2392 T(YAFFS_TRACE_OS, (" erasesize %d\n", mtd->erasesize));
2393 #if LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 29)
2394 T(YAFFS_TRACE_OS, (" size %u\n", mtd->size));
2396 T(YAFFS_TRACE_OS, (" size %lld\n", mtd->size));
2399 #ifdef CONFIG_YAFFS_AUTO_YAFFS2
2401 if (yaffsVersion == 1 && WRITE_SIZE(mtd) >= 2048) {
2402 T(YAFFS_TRACE_ALWAYS, ("yaffs: auto selecting yaffs2\n"));
2406 /* Added NCB 26/5/2006 for completeness */
2407 if (yaffsVersion == 2 && !options.inband_tags && WRITE_SIZE(mtd) == 512) {
2408 T(YAFFS_TRACE_ALWAYS, ("yaffs: auto selecting yaffs1\n"));
2414 if (yaffsVersion == 2) {
2415 /* Check for version 2 style functions */
2417 !mtd->block_isbad ||
2418 !mtd->block_markbad ||
2421 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 17))
2422 !mtd->read_oob || !mtd->write_oob) {
2425 !mtd->read_ecc || !mtd->read_oob || !mtd->write_oob) {
2427 T(YAFFS_TRACE_ALWAYS,
2428 ("yaffs: MTD device does not support required "
2433 if ((WRITE_SIZE(mtd) < YAFFS_MIN_YAFFS2_CHUNK_SIZE ||
2434 mtd->oobsize < YAFFS_MIN_YAFFS2_SPARE_SIZE) &&
2435 !options.inband_tags) {
2436 T(YAFFS_TRACE_ALWAYS,
2437 ("yaffs: MTD device does not have the "
2438 "right page sizes\n"));
2442 /* Check for V1 style functions */
2446 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 17))
2447 !mtd->read_oob || !mtd->write_oob) {
2450 !mtd->read_ecc || !mtd->read_oob || !mtd->write_oob) {
2452 T(YAFFS_TRACE_ALWAYS,
2453 ("yaffs: MTD device does not support required "
2458 if (WRITE_SIZE(mtd) < YAFFS_BYTES_PER_CHUNK ||
2459 mtd->oobsize != YAFFS_BYTES_PER_SPARE) {
2460 T(YAFFS_TRACE_ALWAYS,
2461 ("yaffs: MTD device does not support have the "
2462 "right page sizes\n"));
2467 /* OK, so if we got here, we have an MTD that's NAND and looks
2468 * like it has the right capabilities
2469 * Set the yaffs_Device up for mtd
2472 dev = kmalloc(sizeof(yaffs_Device), GFP_KERNEL);
2473 context = kmalloc(sizeof(struct yaffs_LinuxContext),GFP_KERNEL);
2475 if(!dev || !context ){
2485 /* Deep shit could not allocate device structure */
2486 T(YAFFS_TRACE_ALWAYS,
2487 ("yaffs_read_super: Failed trying to allocate "
2488 "yaffs_Device. \n"));
2491 memset(dev, 0, sizeof(yaffs_Device));
2492 param = &(dev->param);
2494 memset(context,0,sizeof(struct yaffs_LinuxContext));
2495 dev->context = context;
2496 YINIT_LIST_HEAD(&(context->contextList));
2498 context->superBlock = sb;
2502 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0))
2503 sb->s_fs_info = dev;
2505 sb->u.generic_sbp = dev;
2508 yaffs_DeviceToContext(dev)->mtd = mtd;
2509 param->name = mtd->name;
2511 /* Set up the memory size parameters.... */
2513 nBlocks = YCALCBLOCKS(mtd->size, (YAFFS_CHUNKS_PER_BLOCK * YAFFS_BYTES_PER_CHUNK));
2515 param->startBlock = 0;
2516 param->endBlock = nBlocks - 1;
2517 param->nChunksPerBlock = YAFFS_CHUNKS_PER_BLOCK;
2518 param->totalBytesPerChunk = YAFFS_BYTES_PER_CHUNK;
2519 param->nReservedBlocks = 5;
2520 param->nShortOpCaches = (options.no_cache) ? 0 : 10;
2521 param->inbandTags = options.inband_tags;
2523 #ifdef CONFIG_YAFFS_DISABLE_LAZY_LOAD
2524 param->disableLazyLoad = 1;
2526 if(options.lazy_loading_overridden)
2527 param->disableLazyLoad = !options.lazy_loading_enabled;
2529 #ifdef CONFIG_YAFFS_DISABLE_TAGS_ECC
2530 param->noTagsECC = 1;
2533 #ifdef CONFIG_YAFFS_DISABLE_BACKGROUND
2535 param->deferDirectoryUpdate = 1;
2538 if(options.tags_ecc_overridden)
2539 param->noTagsECC = !options.tags_ecc_on;
2541 #ifdef CONFIG_YAFFS_EMPTY_LOST_AND_FOUND
2542 param->emptyLostAndFound = 1;
2545 #ifdef CONFIG_YAFFS_DISABLE_BLOCK_REFRESHING
2546 param->refreshPeriod = 0;
2548 param->refreshPeriod = 10000;
2551 if(options.empty_lost_and_found_overridden)
2552 param->emptyLostAndFound = options.empty_lost_and_found;
2554 /* ... and the functions. */
2555 if (yaffsVersion == 2) {
2556 param->writeChunkWithTagsToNAND =
2557 nandmtd2_WriteChunkWithTagsToNAND;
2558 param->readChunkWithTagsFromNAND =
2559 nandmtd2_ReadChunkWithTagsFromNAND;
2560 param->markNANDBlockBad = nandmtd2_MarkNANDBlockBad;
2561 param->queryNANDBlock = nandmtd2_QueryNANDBlock;
2562 yaffs_DeviceToContext(dev)->spareBuffer = YMALLOC(mtd->oobsize);
2563 param->isYaffs2 = 1;
2564 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 17))
2565 param->totalBytesPerChunk = mtd->writesize;
2566 param->nChunksPerBlock = mtd->erasesize / mtd->writesize;
2568 param->totalBytesPerChunk = mtd->oobblock;
2569 param->nChunksPerBlock = mtd->erasesize / mtd->oobblock;
2571 nBlocks = YCALCBLOCKS(mtd->size, mtd->erasesize);
2573 param->startBlock = 0;
2574 param->endBlock = nBlocks - 1;
2576 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 17))
2577 /* use the MTD interface in yaffs_mtdif1.c */
2578 param->writeChunkWithTagsToNAND =
2579 nandmtd1_WriteChunkWithTagsToNAND;
2580 param->readChunkWithTagsFromNAND =
2581 nandmtd1_ReadChunkWithTagsFromNAND;
2582 param->markNANDBlockBad = nandmtd1_MarkNANDBlockBad;
2583 param->queryNANDBlock = nandmtd1_QueryNANDBlock;
2585 param->writeChunkToNAND = nandmtd_WriteChunkToNAND;
2586 param->readChunkFromNAND = nandmtd_ReadChunkFromNAND;
2588 param->isYaffs2 = 0;
2590 /* ... and common functions */
2591 param->eraseBlockInNAND = nandmtd_EraseBlockInNAND;
2592 param->initialiseNAND = nandmtd_InitialiseNAND;
2594 yaffs_DeviceToContext(dev)->putSuperFunc = yaffs_MTDPutSuper;
2596 param->markSuperBlockDirty = yaffs_MarkSuperBlockDirty;
2597 param->gcControl = yaffs_gc_control_callback;
2599 yaffs_DeviceToContext(dev)->superBlock= sb;
2602 #ifndef CONFIG_YAFFS_DOES_ECC
2603 param->useNANDECC = 1;
2606 #ifdef CONFIG_YAFFS_DISABLE_WIDE_TNODES
2607 param->wideTnodesDisabled = 1;
2610 param->skipCheckpointRead = options.skip_checkpoint_read;
2611 param->skipCheckpointWrite = options.skip_checkpoint_write;
2613 /* we assume this is protected by lock_kernel() in mount/umount */
2614 down(&yaffs_context_lock);
2615 ylist_add_tail(&(yaffs_DeviceToContext(dev)->contextList), &yaffs_context_list);
2616 up(&yaffs_context_lock);
2618 /* Directory search handling...*/
2619 YINIT_LIST_HEAD(&(yaffs_DeviceToContext(dev)->searchContexts));
2620 param->removeObjectCallback = yaffs_RemoveObjectCallback;
2622 init_MUTEX(&(yaffs_DeviceToContext(dev)->grossLock));
2624 yaffs_GrossLock(dev);
2626 err = yaffs_GutsInitialise(dev);
2629 ("yaffs_read_super: guts initialised %s\n",
2630 (err == YAFFS_OK) ? "OK" : "FAILED"));
2633 yaffs_BackgroundStart(dev);
2635 if(!context->bgThread)
2636 param->deferDirectoryUpdate = 0;
2639 /* Release lock before yaffs_get_inode() */
2640 yaffs_GrossUnlock(dev);
2642 /* Create root inode */
2643 if (err == YAFFS_OK)
2644 inode = yaffs_get_inode(sb, S_IFDIR | 0755, 0,
2650 inode->i_op = &yaffs_dir_inode_operations;
2651 inode->i_fop = &yaffs_dir_operations;
2653 T(YAFFS_TRACE_OS, ("yaffs_read_super: got root inode\n"));
2655 root = d_alloc_root(inode);
2657 T(YAFFS_TRACE_OS, ("yaffs_read_super: d_alloc_root done\n"));
2664 sb->s_dirt = !dev->isCheckpointed;
2665 T(YAFFS_TRACE_ALWAYS,
2666 ("yaffs_read_super: isCheckpointed %d\n", dev->isCheckpointed));
2668 T(YAFFS_TRACE_OS, ("yaffs_read_super: done\n"));
2673 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0))
2674 static int yaffs_internal_read_super_mtd(struct super_block *sb, void *data,
2677 return yaffs_internal_read_super(1, sb, data, silent) ? 0 : -EINVAL;
2680 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 17))
2681 static int yaffs_read_super(struct file_system_type *fs,
2682 int flags, const char *dev_name,
2683 void *data, struct vfsmount *mnt)
2686 return get_sb_bdev(fs, flags, dev_name, data,
2687 yaffs_internal_read_super_mtd, mnt);
2690 static struct super_block *yaffs_read_super(struct file_system_type *fs,
2691 int flags, const char *dev_name,
2695 return get_sb_bdev(fs, flags, dev_name, data,
2696 yaffs_internal_read_super_mtd);
2700 static struct file_system_type yaffs_fs_type = {
2701 .owner = THIS_MODULE,
2703 .get_sb = yaffs_read_super,
2704 .kill_sb = kill_block_super,
2705 .fs_flags = FS_REQUIRES_DEV,
2708 static struct super_block *yaffs_read_super(struct super_block *sb, void *data,
2711 return yaffs_internal_read_super(1, sb, data, silent);
2714 static DECLARE_FSTYPE(yaffs_fs_type, "yaffs", yaffs_read_super,
2719 #ifdef CONFIG_YAFFS_YAFFS2
2721 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0))
2722 static int yaffs2_internal_read_super_mtd(struct super_block *sb, void *data,
2725 return yaffs_internal_read_super(2, sb, data, silent) ? 0 : -EINVAL;
2728 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 17))
2729 static int yaffs2_read_super(struct file_system_type *fs,
2730 int flags, const char *dev_name, void *data,
2731 struct vfsmount *mnt)
2733 return get_sb_bdev(fs, flags, dev_name, data,
2734 yaffs2_internal_read_super_mtd, mnt);
2737 static struct super_block *yaffs2_read_super(struct file_system_type *fs,
2738 int flags, const char *dev_name,
2742 return get_sb_bdev(fs, flags, dev_name, data,
2743 yaffs2_internal_read_super_mtd);
2747 static struct file_system_type yaffs2_fs_type = {
2748 .owner = THIS_MODULE,
2750 .get_sb = yaffs2_read_super,
2751 .kill_sb = kill_block_super,
2752 .fs_flags = FS_REQUIRES_DEV,
2755 static struct super_block *yaffs2_read_super(struct super_block *sb,
2756 void *data, int silent)
2758 return yaffs_internal_read_super(2, sb, data, silent);
2761 static DECLARE_FSTYPE(yaffs2_fs_type, "yaffs2", yaffs2_read_super,
2765 #endif /* CONFIG_YAFFS_YAFFS2 */
2767 static struct proc_dir_entry *my_proc_entry;
2768 static struct proc_dir_entry *debug_proc_entry;
2770 static char *yaffs_dump_dev_part0(char *buf, yaffs_Device * dev)
2772 buf += sprintf(buf, "startBlock......... %d\n", dev->param.startBlock);
2773 buf += sprintf(buf, "endBlock........... %d\n", dev->param.endBlock);
2774 buf += sprintf(buf, "totalBytesPerChunk. %d\n", dev->param.totalBytesPerChunk);
2775 buf += sprintf(buf, "useNANDECC......... %d\n", dev->param.useNANDECC);
2776 buf += sprintf(buf, "noTagsECC.......... %d\n", dev->param.noTagsECC);
2777 buf += sprintf(buf, "isYaffs2........... %d\n", dev->param.isYaffs2);
2778 buf += sprintf(buf, "inbandTags......... %d\n", dev->param.inbandTags);
2779 buf += sprintf(buf, "emptyLostAndFound.. %d\n", dev->param.emptyLostAndFound);
2780 buf += sprintf(buf, "disableLazyLoad.... %d\n", dev->param.disableLazyLoad);
2781 buf += sprintf(buf, "refreshPeriod...... %d\n", dev->param.refreshPeriod);
2782 buf += sprintf(buf, "nShortOpCaches..... %d\n", dev->param.nShortOpCaches);
2783 buf += sprintf(buf, "nReservedBlocks.... %d\n", dev->param.nReservedBlocks);
2785 buf += sprintf(buf, "\n");
2791 static char *yaffs_dump_dev_part1(char *buf, yaffs_Device * dev)
2793 buf += sprintf(buf, "nDataBytesPerChunk. %d\n", dev->nDataBytesPerChunk);
2794 buf += sprintf(buf, "chunkGroupBits..... %d\n", dev->chunkGroupBits);
2795 buf += sprintf(buf, "chunkGroupSize..... %d\n", dev->chunkGroupSize);
2796 buf += sprintf(buf, "nErasedBlocks...... %d\n", dev->nErasedBlocks);
2797 buf += sprintf(buf, "blocksInCheckpoint. %d\n", dev->blocksInCheckpoint);
2798 buf += sprintf(buf, "\n");
2799 buf += sprintf(buf, "nTnodesCreated..... %d\n", dev->nTnodesCreated);
2800 buf += sprintf(buf, "nFreeTnodes........ %d\n", dev->nFreeTnodes);
2801 buf += sprintf(buf, "nObjectsCreated.... %d\n", dev->nObjectsCreated);
2802 buf += sprintf(buf, "nFreeObjects....... %d\n", dev->nFreeObjects);
2803 buf += sprintf(buf, "nFreeChunks........ %d\n", dev->nFreeChunks);
2804 buf += sprintf(buf, "\n");
2805 buf += sprintf(buf, "nPageWrites........ %u\n", dev->nPageWrites);
2806 buf += sprintf(buf, "nPageReads......... %u\n", dev->nPageReads);
2807 buf += sprintf(buf, "nBlockErasures..... %u\n", dev->nBlockErasures);
2808 buf += sprintf(buf, "nGCCopies.......... %u\n", dev->nGCCopies);
2809 buf += sprintf(buf, "garbageCollections. %u\n", dev->garbageCollections);
2810 buf += sprintf(buf, "passiveGCs......... %u\n", dev->passiveGarbageCollections);
2811 buf += sprintf(buf, "nRetriedWrites..... %u\n", dev->nRetriedWrites);
2812 buf += sprintf(buf, "nRetireBlocks...... %u\n", dev->nRetiredBlocks);
2813 buf += sprintf(buf, "eccFixed........... %u\n", dev->eccFixed);
2814 buf += sprintf(buf, "eccUnfixed......... %u\n", dev->eccUnfixed);
2815 buf += sprintf(buf, "tagsEccFixed....... %u\n", dev->tagsEccFixed);
2816 buf += sprintf(buf, "tagsEccUnfixed..... %u\n", dev->tagsEccUnfixed);
2817 buf += sprintf(buf, "cacheHits.......... %u\n", dev->cacheHits);
2818 buf += sprintf(buf, "nDeletedFiles...... %u\n", dev->nDeletedFiles);
2819 buf += sprintf(buf, "nUnlinkedFiles..... %u\n", dev->nUnlinkedFiles);
2820 buf += sprintf(buf, "refreshCount....... %u\n", dev->refreshCount);
2822 sprintf(buf, "nBackgroudDeletions %u\n", dev->nBackgroundDeletions);
2827 static int yaffs_proc_read(char *page,
2829 off_t offset, int count, int *eof, void *data)
2831 struct ylist_head *item;
2836 /* Get proc_file_read() to step 'offset' by one on each sucessive call.
2837 * We use 'offset' (*ppos) to indicate where we are in devList.
2838 * This also assumes the user has posted a read buffer large
2839 * enough to hold the complete output; but that's life in /proc.
2844 /* Print header first */
2846 buf += sprintf(buf, "YAFFS built:" __DATE__ " " __TIME__
2847 "\n%s\n%s\n", yaffs_fs_c_version,
2848 yaffs_guts_c_version);
2850 buf += sprintf(buf,"\n");
2854 down(&yaffs_context_lock);
2856 /* Locate and print the Nth entry. Order N-squared but N is small. */
2857 ylist_for_each(item, &yaffs_context_list) {
2858 struct yaffs_LinuxContext *dc = ylist_entry(item, struct yaffs_LinuxContext, contextList);
2859 yaffs_Device *dev = dc->dev;
2861 if (n < (step & ~1)) {
2866 buf += sprintf(buf, "\nDevice %d \"%s\"\n", n, dev->param.name);
2867 buf = yaffs_dump_dev_part0(buf, dev);
2869 buf = yaffs_dump_dev_part1(buf, dev);
2873 up(&yaffs_context_lock);
2876 return buf - page < count ? buf - page : count;
2879 static int yaffs_debug_proc_read(char *page,
2881 off_t offset, int count, int *eof, void *data)
2883 struct ylist_head *item;
2887 down(&yaffs_context_lock);
2889 /* Locate and print the Nth entry. Order N-squared but N is small. */
2890 ylist_for_each(item, &yaffs_context_list) {
2891 struct yaffs_LinuxContext *dc = ylist_entry(item, struct yaffs_LinuxContext, contextList);
2892 yaffs_Device *dev = dc->dev;
2898 erasedChunks = dev->nErasedBlocks * dev->param.nChunksPerBlock;
2899 nObjects = dev->nObjectsCreated -dev->nFreeObjects;
2900 nTnodes = dev->nTnodesCreated - dev->nFreeTnodes;
2903 buf += sprintf(buf,"%d, %d, %d, %d, %d\n",
2904 n, dev->nFreeChunks, erasedChunks,
2907 up(&yaffs_context_lock);
2910 return buf - page < count ? buf - page : count;
2914 * Set the verbosity of the warnings and error messages.
2916 * Note that the names can only be a..z or _ with the current code.
2921 unsigned mask_bitfield;
2923 {"allocate", YAFFS_TRACE_ALLOCATE},
2924 {"always", YAFFS_TRACE_ALWAYS},
2925 {"bad_blocks", YAFFS_TRACE_BAD_BLOCKS},
2926 {"buffers", YAFFS_TRACE_BUFFERS},
2927 {"bug", YAFFS_TRACE_BUG},
2928 {"checkpt", YAFFS_TRACE_CHECKPOINT},
2929 {"deletion", YAFFS_TRACE_DELETION},
2930 {"erase", YAFFS_TRACE_ERASE},
2931 {"error", YAFFS_TRACE_ERROR},
2932 {"gc_detail", YAFFS_TRACE_GC_DETAIL},
2933 {"gc", YAFFS_TRACE_GC},
2934 {"mtd", YAFFS_TRACE_MTD},
2935 {"nandaccess", YAFFS_TRACE_NANDACCESS},
2936 {"os", YAFFS_TRACE_OS},
2937 {"scan_debug", YAFFS_TRACE_SCAN_DEBUG},
2938 {"scan", YAFFS_TRACE_SCAN},
2939 {"tracing", YAFFS_TRACE_TRACING},
2940 {"sync", YAFFS_TRACE_SYNC},
2942 {"background", YAFFS_TRACE_BACKGROUND},
2944 {"verify", YAFFS_TRACE_VERIFY},
2945 {"verify_nand", YAFFS_TRACE_VERIFY_NAND},
2946 {"verify_full", YAFFS_TRACE_VERIFY_FULL},
2947 {"verify_all", YAFFS_TRACE_VERIFY_ALL},
2949 {"write", YAFFS_TRACE_WRITE},
2950 {"all", 0xffffffff},
2955 #define MAX_MASK_NAME_LENGTH 40
2956 static int yaffs_proc_write_trace_options(struct file *file, const char *buf,
2957 unsigned long count, void *data)
2959 unsigned rg = 0, mask_bitfield;
2963 char substring[MAX_MASK_NAME_LENGTH + 1];
2969 rg = yaffs_traceMask;
2971 while (!done && (pos < count)) {
2973 while ((pos < count) && isspace(buf[pos]))
2990 mask_bitfield = simple_strtoul(buf + pos, &end, 0);
2992 if (end > buf + pos) {
2993 mask_name = "numeral";
2994 len = end - (buf + pos);
2998 for (x = buf + pos, i = 0;
2999 (*x == '_' || (*x >= 'a' && *x <= 'z')) &&
3000 i < MAX_MASK_NAME_LENGTH; x++, i++, pos++)
3002 substring[i] = '\0';
3004 for (i = 0; mask_flags[i].mask_name != NULL; i++) {
3005 if (strcmp(substring, mask_flags[i].mask_name) == 0) {
3006 mask_name = mask_flags[i].mask_name;
3007 mask_bitfield = mask_flags[i].mask_bitfield;
3014 if (mask_name != NULL) {
3018 rg &= ~mask_bitfield;
3021 rg |= mask_bitfield;
3027 rg |= mask_bitfield;
3033 yaffs_traceMask = rg | YAFFS_TRACE_ALWAYS;
3035 printk(KERN_DEBUG "new trace = 0x%08X\n", yaffs_traceMask);
3037 if (rg & YAFFS_TRACE_ALWAYS) {
3038 for (i = 0; mask_flags[i].mask_name != NULL; i++) {
3040 flag = ((rg & mask_flags[i].mask_bitfield) == mask_flags[i].mask_bitfield) ? '+' : '-';
3041 printk(KERN_DEBUG "%c%s\n", flag, mask_flags[i].mask_name);
3049 static int yaffs_proc_write(struct file *file, const char *buf,
3050 unsigned long count, void *data)
3052 return yaffs_proc_write_trace_options(file, buf, count, data);
3055 /* Stuff to handle installation of file systems */
3056 struct file_system_to_install {
3057 struct file_system_type *fst;
3061 static struct file_system_to_install fs_to_install[] = {
3062 {&yaffs_fs_type, 0},
3063 {&yaffs2_fs_type, 0},
3067 static int __init init_yaffs_fs(void)
3070 struct file_system_to_install *fsinst;
3072 T(YAFFS_TRACE_ALWAYS,
3073 ("yaffs " __DATE__ " " __TIME__ " Installing. \n"));
3075 init_MUTEX(&yaffs_context_lock);
3077 /* Install the proc_fs entries */
3078 my_proc_entry = create_proc_entry("yaffs",
3082 if (my_proc_entry) {
3083 my_proc_entry->write_proc = yaffs_proc_write;
3084 my_proc_entry->read_proc = yaffs_proc_read;
3085 my_proc_entry->data = NULL;
3089 debug_proc_entry = create_proc_entry("yaffs_debug",
3093 if (debug_proc_entry) {
3094 debug_proc_entry->write_proc = NULL;
3095 debug_proc_entry->read_proc = yaffs_debug_proc_read;
3096 debug_proc_entry->data = NULL;
3100 /* Now add the file system entries */
3102 fsinst = fs_to_install;
3104 while (fsinst->fst && !error) {
3105 error = register_filesystem(fsinst->fst);
3107 fsinst->installed = 1;
3111 /* Any errors? uninstall */
3113 fsinst = fs_to_install;
3115 while (fsinst->fst) {
3116 if (fsinst->installed) {
3117 unregister_filesystem(fsinst->fst);
3118 fsinst->installed = 0;
3127 static void __exit exit_yaffs_fs(void)
3130 struct file_system_to_install *fsinst;
3132 T(YAFFS_TRACE_ALWAYS, ("yaffs " __DATE__ " " __TIME__
3135 remove_proc_entry("yaffs", YPROC_ROOT);
3137 fsinst = fs_to_install;
3139 while (fsinst->fst) {
3140 if (fsinst->installed) {
3141 unregister_filesystem(fsinst->fst);
3142 fsinst->installed = 0;
3148 module_init(init_yaffs_fs)
3149 module_exit(exit_yaffs_fs)
3151 MODULE_DESCRIPTION("YAFFS2 - a NAND specific flash file system");
3152 MODULE_AUTHOR("Charles Manning, Aleph One Ltd., 2002-2006");
3153 MODULE_LICENSE("GPL");