2 * YAFFS: Yet another FFS. A NAND-flash specific file system.
5 * Copyright (C) 2002 Aleph One Ltd.
6 * for Toby Churchill Ltd and Brightstar Engineering
8 * Created by Charles Manning <charles@aleph1.co.uk>
10 * This program is free software; you can redistribute it and/or modify
11 * it under the terms of the GNU General Public License version 2 as
12 * published by the Free Software Foundation.
14 * This is the file system front-end to YAFFS that hooks it up to
18 * >> sb->u.generic_sbp points to the yaffs_Device associated with this superblock
19 * >> inode->u.generic_ip points to the associated yaffs_Object.
23 * * Luc van OostenRyck for numerous patches.
24 * * Nick Bane for numerous patches.
25 * * Nick Bane for 2.5/2.6 integration.
26 * * Andras Toth for mknod rdev issue.
27 * * Some code bodily lifted from JFFS2.
31 const char *yaffs_fs_c_version = "$Id: yaffs_fs.c,v 1.31 2003-10-27 08:27:01 charles Exp $";
32 extern const char *yaffs_guts_c_version;
35 #include <linux/config.h>
36 #include <linux/kernel.h>
37 #include <linux/module.h>
38 #include <linux/version.h>
39 #include <linux/slab.h>
40 #include <linux/init.h>
41 #include <linux/list.h>
43 #include <linux/proc_fs.h>
44 #include <linux/pagemap.h>
45 #include <linux/mtd/mtd.h>
46 #include <linux/interrupt.h>
47 #include <linux/string.h>
50 #if defined(CONFIG_KERNEL_2_5)
51 #include <linux/statfs.h> /* Added NCB 15-8-2003 */
52 #include <asm/statfs.h>
53 #define UnlockPage(p) unlock_page(p)
54 #define Page_Uptodate(page) test_bit(PG_uptodate, &(page)->flags)
55 #define kdevname(x) cdevname(to_kdev_t(x))
57 #include <linux/locks.h>
61 #include <asm/uaccess.h>
64 #include "yaffs_guts.h"
69 unsigned yaffs_traceMask = YAFFS_TRACE_ALWAYS | YAFFS_TRACE_BAD_BLOCKS;
71 #ifdef CONFIG_YAFFS_RAM_ENABLED
72 #include "yaffs_nandemul.h"
73 // 2 MB of RAM for emulation
74 #define YAFFS_RAM_EMULATION_SIZE 0x200000
75 #endif //CONFIG_YAFFS_RAM_ENABLED
77 #ifdef CONFIG_YAFFS_MTD_ENABLED
78 #include <linux/mtd/mtd.h>
79 #include "yaffs_mtdif.h"
80 #endif //CONFIG_YAFFS_MTD_ENABLED
82 //#define T(x) printk x
86 #define yaffs_InodeToObject(iptr) ((yaffs_Object *)((iptr)->u.generic_ip))
87 #define yaffs_DentryToObject(dptr) yaffs_InodeToObject((dptr)->d_inode)
88 //NCB #define yaffs_SuperToDevice(sb) ((yaffs_Device *)sb->u.generic_sbp)
90 #if defined(CONFIG_KERNEL_2_5)
91 #define yaffs_SuperToDevice(sb) ((yaffs_Device *)sb->s_fs_info)
93 #define yaffs_SuperToDevice(sb) ((yaffs_Device *)sb->u.generic_sbp)
97 static void yaffs_put_super(struct super_block *sb);
99 static ssize_t yaffs_file_read(struct file *f, char *buf, size_t n, loff_t *pos);
100 static ssize_t yaffs_file_write(struct file *f, const char *buf, size_t n, loff_t *pos);
101 static int yaffs_file_flush(struct file* file);
103 static int yaffs_sync_object(struct file * file, struct dentry *dentry, int datasync);
105 static int yaffs_readdir(struct file *f, void *dirent, filldir_t filldir);
107 #if defined(CONFIG_KERNEL_2_5) /* Added NCB 185-8-2003 */
108 static int yaffs_create(struct inode *dir, struct dentry *dentry, int mode, struct nameidata *n);
109 static struct dentry * yaffs_lookup(struct inode *dir, struct dentry *dentry, struct nameidata *n);
111 static int yaffs_create(struct inode *dir, struct dentry *dentry, int mode);
112 static struct dentry * yaffs_lookup(struct inode *dir, struct dentry *dentry);
114 static int yaffs_link(struct dentry *old_dentry, struct inode * dir, struct dentry * dentry);
115 static int yaffs_unlink(struct inode * dir, struct dentry *dentry);
116 static int yaffs_symlink(struct inode * dir, struct dentry *dentry, const char * symname);
117 static int yaffs_mkdir(struct inode * dir, struct dentry * dentry, int mode);
119 #if defined(CONFIG_KERNEL_2_5)
120 static int yaffs_mknod(struct inode *dir, struct dentry *dentry, int mode, dev_t dev);
122 static int yaffs_mknod(struct inode *dir, struct dentry *dentry, int mode, int dev);
124 static int yaffs_rename(struct inode * old_dir, struct dentry *old_dentry, struct inode * new_dir,struct dentry *new_dentry);
125 static int yaffs_setattr(struct dentry *dentry, struct iattr *attr);
127 #if defined(CONFIG_KERNEL_2_5) /* Added NCB 185-8-2003 */
128 static int yaffs_statfs(struct super_block *sb, struct kstatfs *buf);
130 static int yaffs_statfs(struct super_block *sb, struct statfs *buf);
132 static void yaffs_read_inode (struct inode *inode);
134 #if defined(CONFIG_KERNEL_2_5)
135 static struct super_block *yaffs_read_super(struct file_system_type * fs, int flags, const char *dev_name, void *data);
137 static struct super_block *yaffs_read_super(struct super_block * sb, void * data, int silent);
140 static void yaffs_put_inode (struct inode *inode);
141 static void yaffs_delete_inode(struct inode *);
142 static void yaffs_clear_inode(struct inode *);
144 static int yaffs_readpage(struct file *file, struct page * page);
145 static int yaffs_writepage(struct page *page);
146 static int yaffs_prepare_write(struct file *f, struct page *pg, unsigned offset, unsigned to);
147 static int yaffs_commit_write(struct file *f, struct page *pg, unsigned offset, unsigned to);
149 static int yaffs_readlink(struct dentry *dentry, char *buffer, int buflen);
150 static int yaffs_follow_link(struct dentry *dentry, struct nameidata *nd);
155 static struct address_space_operations yaffs_file_address_operations = {
156 readpage: yaffs_readpage,
157 writepage: yaffs_writepage,
158 prepare_write: yaffs_prepare_write,
159 commit_write: yaffs_commit_write
163 static struct file_operations yaffs_file_operations = {
164 #ifdef CONFIG_YAFFS_USE_GENERIC_RW
165 read: generic_file_read,
166 write: generic_file_write,
168 read: yaffs_file_read,
169 write: yaffs_file_write,
171 mmap: generic_file_mmap,
172 flush: yaffs_file_flush,
173 fsync: yaffs_sync_object,
177 static struct inode_operations yaffs_file_inode_operations = {
178 setattr: yaffs_setattr,
182 struct inode_operations yaffs_symlink_inode_operations =
184 readlink: yaffs_readlink,
185 follow_link: yaffs_follow_link,
186 setattr: yaffs_setattr
189 static struct inode_operations yaffs_dir_inode_operations = {
190 create: yaffs_create,
191 lookup: yaffs_lookup,
193 unlink: yaffs_unlink,
194 symlink: yaffs_symlink,
198 rename: yaffs_rename,
199 setattr: yaffs_setattr,
202 static struct file_operations yaffs_dir_operations = {
203 read: generic_read_dir,
204 readdir: yaffs_readdir,
205 fsync: yaffs_sync_object,
209 static struct super_operations yaffs_super_ops = {
210 statfs: yaffs_statfs,
211 read_inode: yaffs_read_inode,
212 put_inode: yaffs_put_inode,
213 put_super: yaffs_put_super,
215 delete_inode: yaffs_delete_inode,
216 clear_inode: yaffs_clear_inode,
221 static void yaffs_GrossLock(yaffs_Device *dev)
223 T(YAFFS_TRACE_OS,(KERN_DEBUG"yaffs locking\n"));
225 down(&dev->grossLock);
228 static void yaffs_GrossUnlock(yaffs_Device *dev)
230 T(YAFFS_TRACE_OS,(KERN_DEBUG"yaffs unlocking\n"));
235 static int yaffs_readlink(struct dentry *dentry, char *buffer, int buflen)
237 unsigned char *alias;
240 yaffs_Device *dev = yaffs_DentryToObject(dentry)->myDev;
243 yaffs_GrossLock(dev);
245 alias = yaffs_GetSymlinkAlias(yaffs_DentryToObject(dentry));
247 yaffs_GrossUnlock(dev);
252 ret = vfs_readlink(dentry, buffer, buflen, alias);
257 static int yaffs_follow_link(struct dentry *dentry, struct nameidata *nd)
259 unsigned char *alias;
261 yaffs_Device *dev = yaffs_DentryToObject(dentry)->myDev;
264 yaffs_GrossLock(dev);
266 alias = yaffs_GetSymlinkAlias(yaffs_DentryToObject(dentry));
268 yaffs_GrossUnlock(dev);
273 ret = vfs_follow_link(nd,alias);
279 struct inode *yaffs_get_inode(struct super_block *sb, int mode, int dev,yaffs_Object *obj);
282 * Lookup is used to find objects in the fs
284 #if defined(CONFIG_KERNEL_2_5) /* Added NCB 185-8-2003 */
285 static struct dentry * yaffs_lookup(struct inode *dir, struct dentry *dentry, struct nameidata *n)
287 static struct dentry * yaffs_lookup(struct inode *dir, struct dentry *dentry)
291 struct inode *inode = NULL; // NCB 2.5/2.6 needs NULL here
293 yaffs_Device *dev = yaffs_InodeToObject(dir)->myDev;
296 yaffs_GrossLock(dev);
299 T(YAFFS_TRACE_OS,(KERN_DEBUG"yaffs_lookup for %d:%s\n",yaffs_InodeToObject(dir)->objectId,dentry->d_name.name));
301 obj = yaffs_FindObjectByName(yaffs_InodeToObject(dir),dentry->d_name.name);
303 obj = yaffs_GetEquivalentObject(obj); // in case it was a hardlink
309 T(YAFFS_TRACE_OS,(KERN_DEBUG"yaffs_lookup found %d\n",obj->objectId));
311 inode = yaffs_get_inode(dir->i_sb, obj->st_mode,0,obj);
315 T(YAFFS_TRACE_OS,(KERN_DEBUG"yaffs_loookup dentry \n"));
316 /* #if 0 asserted by NCB for 2.5/6 compatability - falls through to d_add even if NULL inode */
318 //dget(dentry); // try to solve directory bug
321 yaffs_GrossUnlock(dev);
331 T(YAFFS_TRACE_OS,(KERN_DEBUG"yaffs_lookup not found\n"));
334 yaffs_GrossUnlock(dev);
336 /* added NCB for 2.5/6 compatability - forces add even if inode is NULL which creates dentry hash*/
340 // return (ERR_PTR(-EIO));
344 // For now put inode is just for debugging
345 // Put inode is called when the inode **structure** is put.
346 static void yaffs_put_inode(struct inode *inode)
348 T(YAFFS_TRACE_OS,("yaffs_put_inode: ino %d, count %d\n",(int)inode->i_ino, atomic_read(&inode->i_count)));
352 // clear is called to tell the fs to release any per-inode data it holds
353 static void yaffs_clear_inode(struct inode *inode)
355 yaffs_Object *obj = yaffs_InodeToObject(inode);
357 T(YAFFS_TRACE_OS,("yaffs_clear_inode: ino %d, count %d %s\n",(int)inode->i_ino, atomic_read(&inode->i_count),
358 obj ? "object exists" : "null object"));
363 inode->u.generic_ip = NULL;
369 // delete is called when the link count is zero and the inode
370 // is put (ie. nobody wants to know about it anymore, time to
372 // NB Must call clear_inode()
373 static void yaffs_delete_inode(struct inode *inode)
375 yaffs_Object *obj = yaffs_InodeToObject(inode);
378 T(YAFFS_TRACE_OS,("yaffs_delete_inode: ino %d, count %d %s\n",(int)inode->i_ino, atomic_read(&inode->i_count),
379 obj ? "object exists" : "null object"));
384 yaffs_GrossLock(dev);
385 yaffs_DeleteFile(obj);
386 yaffs_GrossUnlock(dev);
392 static int yaffs_file_flush(struct file* file)
394 yaffs_Object *obj = yaffs_DentryToObject(file->f_dentry);
396 yaffs_Device *dev = obj->myDev;
398 T(YAFFS_TRACE_OS,(KERN_DEBUG"yaffs_file_flush object %d (%s)\n",obj->objectId,
399 obj->dirty ? "dirty" : "clean"));
401 yaffs_GrossLock(dev);
403 yaffs_FlushFile(obj,1);
405 yaffs_GrossUnlock(dev);
412 static int yaffs_readpage_nolock(struct file *f, struct page * pg)
417 unsigned char *pg_buf;
422 T(YAFFS_TRACE_OS,(KERN_DEBUG"yaffs_readpage at %08x, size %08x\n",
423 (unsigned)(pg->index << PAGE_CACHE_SHIFT), (unsigned)PAGE_CACHE_SIZE));
425 obj = yaffs_DentryToObject(f->f_dentry);
434 /* FIXME: Can kmap fail? */
436 yaffs_GrossLock(dev);
438 ret = yaffs_ReadDataFromFile(obj, pg_buf, pg->index << PAGE_CACHE_SHIFT, PAGE_CACHE_SIZE);
440 yaffs_GrossUnlock(dev);
442 if(ret >= 0) ret = 0;
445 ClearPageUptodate(pg);
452 flush_dcache_page(pg);
456 T(YAFFS_TRACE_OS,(KERN_DEBUG"yaffs_readpage done\n"));
460 static int yaffs_readpage_unlock(struct file *f, struct page *pg)
462 int ret = yaffs_readpage_nolock(f,pg);
467 static int yaffs_readpage(struct file *f, struct page * pg)
469 return yaffs_readpage_unlock(f,pg);
472 // writepage inspired by/stolen from smbfs
475 static int yaffs_writepage(struct page *page)
477 struct address_space *mapping = page->mapping;
479 unsigned long end_index;
487 inode = mapping->host;
491 end_index = inode->i_size >> PAGE_CACHE_SHIFT;
494 if (page->index < end_index)
496 nBytes = PAGE_CACHE_SIZE;
500 nBytes = inode->i_size & (PAGE_CACHE_SIZE-1);
502 // What's happening here?
503 ///* OK, are we completely out? */
504 //if (page->index >= end_index+1 || !offset)
512 obj = yaffs_InodeToObject(inode);
513 yaffs_GrossLock(obj->myDev);
516 nWritten = yaffs_WriteDataToFile(obj,buffer,page->index << PAGE_CACHE_SHIFT,nBytes);
518 yaffs_GrossUnlock(obj->myDev);
521 SetPageUptodate(page);
525 return nWritten>0 ? nWritten : -ENOSPC;
530 static int yaffs_prepare_write(struct file *f, struct page *pg, unsigned offset, unsigned to)
533 T(YAFFS_TRACE_OS,(KERN_DEBUG"yaffs_prepair_write\n"));
534 if(!Page_Uptodate(pg) && (offset || to < PAGE_CACHE_SIZE))
535 return yaffs_readpage_nolock(f,pg);
541 static int yaffs_commit_write(struct file *f, struct page *pg, unsigned offset, unsigned to)
544 void *addr = page_address(pg) + offset;
545 loff_t pos = (((loff_t)pg->index) << PAGE_CACHE_SHIFT) + offset;
546 int nBytes = to - offset;
550 unsigned saddr = (unsigned)addr;
552 T(YAFFS_TRACE_OS,(KERN_DEBUG"yaffs_commit_write addr %x pos %x nBytes %d\n",saddr,spos,nBytes));
554 nWritten = yaffs_file_write(f,addr, nBytes, &pos);
556 if(nWritten != nBytes)
558 T(YAFFS_TRACE_OS,(KERN_DEBUG"yaffs_commit_write not same size nWritten %d nBytes %d\n",nWritten,nBytes));
560 ClearPageUptodate(pg);
567 T(YAFFS_TRACE_OS,(KERN_DEBUG"yaffs_commit_write returning %d\n",nWritten));
575 static void yaffs_FillInodeFromObject(struct inode *inode, yaffs_Object *obj)
579 inode->i_ino = obj->objectId;
580 inode->i_mode = obj->st_mode;
581 inode->i_uid = obj->st_uid;
582 inode->i_gid = obj->st_gid;
583 inode->i_blksize = inode->i_sb->s_blocksize;
584 #if defined(CONFIG_KERNEL_2_5)
585 inode->i_rdev = to_kdev_t(obj->st_rdev);
586 inode->i_atime.tv_sec = (time_t)(obj->st_atime);
587 inode->i_atime.tv_nsec = 0;
588 inode->i_mtime.tv_sec = (time_t)obj->st_mtime;
589 inode->i_mtime.tv_nsec =0;
590 inode->i_ctime.tv_sec = (time_t)obj->st_ctime;
591 inode->i_ctime.tv_nsec = 0;
593 inode->i_rdev = obj->st_rdev;
594 inode->i_atime = obj->st_atime;
595 inode->i_mtime = obj->st_mtime;
596 inode->i_ctime = obj->st_ctime;
598 inode->i_size = yaffs_GetObjectFileLength(obj);
599 inode->i_blocks = (inode->i_size + 511) >> 9;
601 inode->i_nlink = yaffs_GetObjectLinkCount(obj);
603 T(YAFFS_TRACE_OS,(KERN_DEBUG"yaffs_FillInode mode %x uid %d gid %d size %d count %d\n",
604 inode->i_mode, inode->i_uid, inode->i_gid, (int)inode->i_size, atomic_read(&inode->i_count)));
606 switch (obj->st_mode & S_IFMT)
608 default: // fifo, device or socket
609 init_special_inode(inode, obj->st_mode,(dev_t)(obj->st_rdev));
611 case S_IFREG: // file
612 inode->i_op = &yaffs_file_inode_operations;
613 inode->i_fop = &yaffs_file_operations;
614 inode->i_mapping->a_ops = &yaffs_file_address_operations;
616 case S_IFDIR: // directory
617 inode->i_op = &yaffs_dir_inode_operations;
618 inode->i_fop = &yaffs_dir_operations;
620 case S_IFLNK: // symlink
621 inode->i_op = &yaffs_symlink_inode_operations;
626 inode->u.generic_ip = obj;
627 obj->myInode = inode;
632 T(YAFFS_TRACE_OS,(KERN_DEBUG"yaffs_FileInode invalid parameters\n"));
637 struct inode *yaffs_get_inode(struct super_block *sb, int mode, int dev,yaffs_Object *obj)
639 struct inode * inode;
641 T(YAFFS_TRACE_OS,(KERN_DEBUG"yaffs_get_inode for object %d\n",obj->objectId));
643 inode = iget(sb,obj->objectId);
645 // NB Side effect: iget calls back to yaffs_read_inode().
646 // iget also increments the inode's i_count
651 static ssize_t yaffs_file_read(struct file *f, char *buf, size_t n, loff_t *pos)
658 T(YAFFS_TRACE_OS,(KERN_DEBUG"yaffs_file_read\n"));
660 obj = yaffs_DentryToObject(f->f_dentry);
664 yaffs_GrossLock(dev);
666 inode = f->f_dentry->d_inode;
668 if (*pos < inode->i_size)
670 if (*pos + n > inode->i_size)
672 n = inode->i_size - *pos;
680 nRead = yaffs_ReadDataFromFile(obj,buf,*pos,n);
686 yaffs_GrossUnlock(dev);
690 T(YAFFS_TRACE_OS,(KERN_DEBUG"yaffs_file_read read %d bytes, %d read at %d\n",n,nRead,ipos));
696 static ssize_t yaffs_file_write(struct file *f, const char *buf, size_t n, loff_t *pos)
704 obj = yaffs_DentryToObject(f->f_dentry);
708 yaffs_GrossLock(dev);
710 inode = f->f_dentry->d_inode;
712 if(!S_ISBLK(inode->i_mode) && f->f_flags & O_APPEND)
714 ipos = inode->i_size;
724 T(YAFFS_TRACE_OS,(KERN_DEBUG"yaffs_file_write: hey obj is null!\n"));
728 T(YAFFS_TRACE_OS,(KERN_DEBUG"yaffs_file_write about to write writing %d bytes to object %d at %d\n",n,obj->objectId,ipos));
731 nWritten = yaffs_WriteDataToFile(obj,buf,ipos,n);
733 T(YAFFS_TRACE_OS,(KERN_DEBUG"yaffs_file_write writing %d bytes, %d written at %d\n",n,nWritten,ipos));
738 if(ipos > inode->i_size)
740 inode->i_size = ipos;
741 inode->i_blocks = (ipos + 511)>>9;
743 T(YAFFS_TRACE_OS,(KERN_DEBUG"yaffs_file_write size updated to %d bytes, %d blocks\n",ipos,(int)(inode->i_blocks)));
747 yaffs_GrossUnlock(dev);
749 return nWritten != n ? -ENOSPC : nWritten;
753 static int yaffs_readdir(struct file *f, void *dirent, filldir_t filldir)
757 struct inode *inode = f->f_dentry->d_inode;
758 unsigned long offset, curoffs;
762 char name[YAFFS_MAX_NAME_LENGTH +1];
764 obj = yaffs_DentryToObject(f->f_dentry);
767 yaffs_GrossLock(dev);
771 T(YAFFS_TRACE_OS,("yaffs_readdir: starting at %d\n",(int)offset));
775 T(YAFFS_TRACE_OS,(KERN_DEBUG"yaffs_readdir: entry . ino %d \n",(int)inode->i_ino));
776 if(filldir(dirent,".",1,offset,inode->i_ino,DT_DIR) < 0)
785 T(YAFFS_TRACE_OS,(KERN_DEBUG"yaffs_readdir: entry .. ino %d \n",(int)f->f_dentry->d_parent->d_inode->i_ino));
786 if(filldir(dirent,"..",2,offset,f->f_dentry->d_parent->d_inode->i_ino,DT_DIR) < 0)
796 list_for_each(i,&obj->variant.directoryVariant.children)
799 if(curoffs >= offset)
801 l = list_entry(i, yaffs_Object,siblings);
803 yaffs_GetObjectName(l,name,YAFFS_MAX_NAME_LENGTH+1);
804 T(YAFFS_TRACE_OS,(KERN_DEBUG"yaffs_readdir: %s inode %d\n",name,yaffs_GetObjectInode(l)));
810 yaffs_GetObjectInode(l),
811 yaffs_GetObjectType(l))
825 yaffs_GrossUnlock(dev);
832 * File creation. Allocate an inode, and we're done..
834 #if defined(CONFIG_KERNEL_2_5)
835 static int yaffs_mknod(struct inode *dir, struct dentry *dentry, int mode, dev_t rdev)
837 static int yaffs_mknod(struct inode *dir, struct dentry *dentry, int mode, int rdev)
842 yaffs_Object *obj = NULL;
845 yaffs_Object *parent = yaffs_InodeToObject(dir);
851 T(YAFFS_TRACE_OS,(KERN_DEBUG"yaffs_mknod: parent object %d type %d\n",
852 parent->objectId,parent->variantType));
856 T(YAFFS_TRACE_OS,(KERN_DEBUG"yaffs_mknod: could not get parent object\n"));
860 T(YAFFS_TRACE_OS,("yaffs_mknod: making oject for %s, mode %x dev %x\n",
861 dentry->d_name.name, mode,rdev));
865 yaffs_GrossLock(dev);
867 switch (mode & S_IFMT)
870 // Special (socket, fifo, device...)
871 T(YAFFS_TRACE_OS,(KERN_DEBUG"yaffs_mknod: making special\n"));
872 obj = yaffs_MknodSpecial(parent,dentry->d_name.name,mode,current->uid, current->gid,rdev);
874 case S_IFREG: // file
875 T(YAFFS_TRACE_OS,(KERN_DEBUG"yaffs_mknod: making file\n"));
876 obj = yaffs_MknodFile(parent,dentry->d_name.name,mode,current->uid, current->gid);
878 case S_IFDIR: // directory
879 T(YAFFS_TRACE_OS,(KERN_DEBUG"yaffs_mknod: making directory\n"));
880 obj = yaffs_MknodDirectory(parent,dentry->d_name.name,mode,current->uid, current->gid);
882 case S_IFLNK: // symlink
883 T(YAFFS_TRACE_OS,(KERN_DEBUG"yaffs_mknod: making file\n"));
884 obj = NULL; // Do we ever get here?
890 inode = yaffs_get_inode(dir->i_sb, mode, rdev, obj);
891 d_instantiate(dentry, inode);
892 T(YAFFS_TRACE_OS,(KERN_DEBUG"yaffs_mknod created object %d count = %d\n",obj->objectId,atomic_read(&inode->i_count)));
897 T(YAFFS_TRACE_OS,(KERN_DEBUG"yaffs_mknod failed making object\n"));
901 yaffs_GrossUnlock(dev);
906 static int yaffs_mkdir(struct inode * dir, struct dentry * dentry, int mode)
909 T(YAFFS_TRACE_OS,(KERN_DEBUG"yaffs_mkdir\n"));
910 retVal = yaffs_mknod(dir, dentry, mode | S_IFDIR, 0);
912 // attempt to fix dir bug - didn't work
921 #if defined(CONFIG_KERNEL_2_5) /* Added NCB 185-8-2003 */
922 static int yaffs_create(struct inode *dir, struct dentry *dentry, int mode, struct nameidata *n)
924 static int yaffs_create(struct inode *dir, struct dentry *dentry, int mode)
927 T(YAFFS_TRACE_OS,(KERN_DEBUG"yaffs_create\n"));
928 return yaffs_mknod(dir, dentry, mode | S_IFREG, 0);
932 static int yaffs_unlink(struct inode * dir, struct dentry *dentry)
939 T(YAFFS_TRACE_OS,(KERN_DEBUG"yaffs_unlink %d:%s\n",(int)(dir->i_ino),dentry->d_name.name));
941 dev = yaffs_InodeToObject(dir)->myDev;
943 yaffs_GrossLock(dev);
946 retVal = yaffs_Unlink(yaffs_InodeToObject(dir),dentry->d_name.name);
949 yaffs_GrossUnlock(dev);
951 if( retVal == YAFFS_OK)
953 dentry->d_inode->i_nlink--;
954 mark_inode_dirty(dentry->d_inode);
967 static int yaffs_link(struct dentry *old_dentry, struct inode * dir, struct dentry * dentry)
969 struct inode *inode = old_dentry->d_inode;
970 yaffs_Object *obj = NULL;
971 yaffs_Object *link=NULL;
974 T(YAFFS_TRACE_OS,(KERN_DEBUG"yaffs_link\n"));
976 obj = yaffs_InodeToObject(inode);
979 yaffs_GrossLock(dev);
981 if (!S_ISDIR(inode->i_mode)) // Don't link directories
983 link = yaffs_Link(yaffs_InodeToObject(dir),dentry->d_name.name,obj);
989 old_dentry->d_inode->i_nlink = yaffs_GetObjectLinkCount(obj);
990 d_instantiate(dentry, old_dentry->d_inode);
991 atomic_inc(&old_dentry->d_inode->i_count);
992 T(YAFFS_TRACE_OS,(KERN_DEBUG"yaffs_link link count %d i_count %d\n",
993 old_dentry->d_inode->i_nlink,atomic_read(&old_dentry->d_inode->i_count)));
997 yaffs_GrossUnlock(dev);
1011 static int yaffs_symlink(struct inode * dir, struct dentry *dentry, const char * symname)
1016 T(YAFFS_TRACE_OS,(KERN_DEBUG"yaffs_symlink\n"));
1018 dev = yaffs_InodeToObject(dir)->myDev;
1019 yaffs_GrossLock(dev);
1020 obj = yaffs_MknodSymLink(yaffs_InodeToObject(dir), dentry->d_name.name,
1021 S_IFLNK | S_IRWXUGO, current->uid, current->gid,
1023 yaffs_GrossUnlock(dev);
1028 struct inode* inode;
1030 inode = yaffs_get_inode(dir->i_sb, obj->st_mode, 0, obj);
1031 d_instantiate(dentry, inode);
1032 T(YAFFS_TRACE_OS,(KERN_DEBUG"symlink created OK\n"));
1037 T(YAFFS_TRACE_OS,(KERN_DEBUG"symlink not created\n"));
1044 static int yaffs_sync_object(struct file * file, struct dentry *dentry, int datasync)
1050 obj = yaffs_DentryToObject(dentry);
1054 T(YAFFS_TRACE_OS,(KERN_DEBUG"yaffs_sync_object\n"));
1055 yaffs_GrossLock(dev);
1056 yaffs_FlushFile(obj,1);
1057 yaffs_GrossUnlock(dev);
1062 * The VFS layer already does all the dentry stuff for rename.
1064 * NB: POSIX says you can rename an object over an old object of the same name
1066 static int yaffs_rename(struct inode * old_dir, struct dentry *old_dentry, struct inode * new_dir,struct dentry *new_dentry)
1069 int retVal = YAFFS_FAIL;
1071 yaffs_Object *target;
1073 dev = yaffs_InodeToObject(old_dir)->myDev;
1075 yaffs_GrossLock(dev);
1077 // Check if the target is an existing directory that is not empty.
1078 target = yaffs_FindObjectByName(yaffs_InodeToObject(new_dir),new_dentry->d_name.name);
1081 target->variantType == YAFFS_OBJECT_TYPE_DIRECTORY &&
1082 !list_empty(&target->variant.directoryVariant.children))
1084 retVal = YAFFS_FAIL;
1089 // Unlink the target if it exists
1090 removed = yaffs_Unlink(yaffs_InodeToObject(new_dir),new_dentry->d_name.name);
1093 retVal = yaffs_RenameObject(yaffs_InodeToObject(old_dir),old_dentry->d_name.name,
1094 yaffs_InodeToObject(new_dir),new_dentry->d_name.name);
1097 yaffs_GrossUnlock(dev);
1099 if(retVal == YAFFS_OK)
1101 if(removed == YAFFS_OK)
1103 new_dentry->d_inode->i_nlink--;
1104 mark_inode_dirty(new_dentry->d_inode);
1117 static int yaffs_setattr(struct dentry *dentry, struct iattr *attr)
1119 struct inode *inode = dentry->d_inode;
1123 T(YAFFS_TRACE_OS,(KERN_DEBUG"yaffs_setattr of object %d\n",yaffs_InodeToObject(inode)->objectId));
1125 if((error = inode_change_ok(inode,attr)) == 0)
1128 dev = yaffs_InodeToObject(inode)->myDev;
1129 yaffs_GrossLock(dev);
1130 if(yaffs_SetAttributes(yaffs_InodeToObject(inode),attr) == YAFFS_OK)
1138 yaffs_GrossUnlock(dev);
1139 inode_setattr(inode,attr);
1144 #if defined(CONFIG_KERNEL_2_5) /* Added NCB 185-8-2003 */
1145 static int yaffs_statfs(struct super_block *sb, struct kstatfs *buf)
1147 static int yaffs_statfs(struct super_block *sb, struct statfs *buf)
1150 yaffs_Device *dev = yaffs_SuperToDevice(sb);
1151 T(YAFFS_TRACE_OS,(KERN_DEBUG"yaffs_statfs\n"));
1153 yaffs_GrossLock(dev);
1155 buf->f_type = YAFFS_MAGIC;
1156 buf->f_bsize = sb->s_blocksize;
1157 buf->f_namelen = 255;
1158 buf->f_blocks = (dev->endBlock - dev->startBlock + 1) * YAFFS_CHUNKS_PER_BLOCK/
1159 (sb->s_blocksize/YAFFS_BYTES_PER_CHUNK);
1162 buf->f_bfree = yaffs_GetNumberOfFreeChunks(dev)/
1163 (sb->s_blocksize/YAFFS_BYTES_PER_CHUNK);
1164 buf->f_bavail = buf->f_bfree;
1166 yaffs_GrossUnlock(dev);
1170 static void yaffs_read_inode (struct inode *inode)
1172 // NB This is called as a side effect of other functions and
1173 // thus gross locking should always be in place already.
1176 yaffs_Device *dev = yaffs_SuperToDevice(inode->i_sb);
1178 T(YAFFS_TRACE_OS,(KERN_DEBUG"yaffs_read_inode for %d\n",(int)inode->i_ino));
1180 obj = yaffs_FindObjectByNumber(dev,inode->i_ino);
1182 yaffs_FillInodeFromObject(inode,obj);
1188 static yaffs_Device *yaffs_dev;
1189 static yaffs_Device *yaffsram_dev;
1193 static void yaffs_put_super(struct super_block *sb)
1195 yaffs_Device *dev = yaffs_SuperToDevice(sb);
1197 yaffs_GrossLock(dev);
1198 if(dev->putSuperFunc)
1200 dev->putSuperFunc(sb);
1202 yaffs_Deinitialise(dev);
1203 yaffs_GrossUnlock(dev);
1205 if(dev == yaffs_dev) yaffs_dev = NULL;
1206 if(dev == yaffsram_dev) yaffsram_dev = NULL;
1212 #ifdef CONFIG_YAFFS_MTD_ENABLED
1214 static void yaffs_MTDPutSuper(struct super_block *sb)
1217 struct mtd_info *mtd = yaffs_SuperToDevice(sb)->genericDevice;
1224 put_mtd_device(mtd);
1230 static struct super_block *yaffs_internal_read_super(int useRam, struct super_block * sb, void * data, int silent)
1233 struct inode * inode;
1234 struct dentry * root;
1237 sb->s_magic = YAFFS_MAGIC;
1238 sb->s_op = &yaffs_super_ops;
1241 printk(KERN_INFO"yaffs: sb is NULL\n");
1243 printk(KERN_INFO"yaffs: sb->s_dev is NULL\n");
1244 else if(! kdevname(sb->s_dev))
1245 printk(KERN_INFO"yaffs: kdevname is NULL\n");
1247 printk(KERN_INFO"yaffs: dev is %d name is \"%s\"\n", sb->s_dev, kdevname(sb->s_dev));
1251 #ifdef CONFIG_YAFFS_USE_CHUNK_SIZE
1252 sb->s_blocksize = YAFFS_BYTES_PER_CHUNK;
1253 sb->s_blocksize_bits = YAFFS_CHUNK_SIZE_SHIFT;
1255 sb->s_blocksize = PAGE_CACHE_SIZE;
1256 sb->s_blocksize_bits = PAGE_CACHE_SHIFT;
1258 T(YAFFS_TRACE_OS,("yaffs_read_super: %s block size %d\n", useRam ? "RAM" : "MTD",(int)(sb->s_blocksize)));
1260 #ifdef CONFIG_YAFFS_DISABLE_WRITE_VERIFY
1261 T(YAFFS_TRACE_OS,("yaffs: Write verification disabled. All guarantees null and void\n"));
1269 #ifdef CONFIG_YAFFS_RAM_ENABLED
1270 // Set the yaffs_Device up for ram emulation
1272 sb->u.generic_sbp = dev = kmalloc(sizeof(yaffs_Device),GFP_KERNEL);
1275 // Deep shit could not allocate device structure
1276 printk(KERN_DEBUG"yaffs_read_super: Failed trying to allocate yaffs_Device. Terminating debug.\n");
1280 memset(dev,0,sizeof(yaffs_Device));
1281 dev->genericDevice = NULL; // Not used for RAM emulation.
1283 nBlocks = YAFFS_RAM_EMULATION_SIZE / (YAFFS_CHUNKS_PER_BLOCK * YAFFS_BYTES_PER_CHUNK);
1284 dev->startBlock = 1; // Don't use block 0
1285 dev->endBlock = nBlocks - 1;
1286 dev->nChunksPerBlock = YAFFS_CHUNKS_PER_BLOCK;
1287 dev->nBytesPerChunk = YAFFS_BYTES_PER_CHUNK;
1288 dev->nReservedBlocks = 5;
1290 dev->writeChunkToNAND = nandemul_WriteChunkToNAND;
1291 dev->readChunkFromNAND = nandemul_ReadChunkFromNAND;
1292 dev->eraseBlockInNAND = nandemul_EraseBlockInNAND;
1293 dev->initialiseNAND = nandemul_InitialiseNAND;
1302 #ifdef CONFIG_YAFFS_MTD_ENABLED
1303 struct mtd_info *mtd;
1305 printk(KERN_DEBUG "yaffs: Attempting MTD mount on %u.%u, \"%s\"\n",
1306 MAJOR(sb->s_dev),MINOR(sb->s_dev),kdevname(sb->s_dev));
1308 // Check it's an mtd device.....
1309 if(MAJOR(sb->s_dev) != MTD_BLOCK_MAJOR)
1311 return NULL; // This isn't an mtd device
1315 mtd = get_mtd_device(NULL, MINOR(sb->s_dev));
1318 printk(KERN_DEBUG "yaffs: MTD device #%u doesn't appear to exist\n", MINOR(sb->s_dev));
1323 if(mtd->type != MTD_NANDFLASH)
1325 printk(KERN_DEBUG "yaffs: MTD device is not NAND it's type %d\n", mtd->type);
1329 //printk(KERN_DEBUG" erase %x\n",mtd->erase);
1330 //printk(KERN_DEBUG" read %x\n",mtd->read);
1331 //printk(KERN_DEBUG" write %x\n",mtd->write);
1332 //printk(KERN_DEBUG" readoob %x\n",mtd->read_oob);
1333 //printk(KERN_DEBUG" writeoob %x\n",mtd->write_oob);
1334 //printk(KERN_DEBUG" oobblock %x\n",mtd->oobblock);
1335 //printk(KERN_DEBUG" oobsize %x\n",mtd->oobsize);
1341 #ifndef CONFIG_YAFFS_USE_OLD_MTD
1348 printk(KERN_DEBUG "yaffs: MTD device does not support required functions\n");
1352 if(mtd->oobblock != YAFFS_BYTES_PER_CHUNK ||
1353 mtd->oobsize != YAFFS_BYTES_PER_SPARE)
1355 printk(KERN_DEBUG "yaffs: MTD device does not support have the right page sizes\n");
1360 // OK, so if we got here, we have an MTD that's NAND and looks
1361 // like it has the right capabilities
1362 // Set the yaffs_Device up for ram emulation
1364 #if defined(CONFIG_KERNEL_2_5)
1365 sb->s_fs_info = dev = kmalloc(sizeof(yaffs_Device),GFP_KERNEL);
1367 sb->u.generic_sbp = dev = kmalloc(sizeof(yaffs_Device),GFP_KERNEL);
1371 // Deep shit could not allocate device structure
1372 printk(KERN_DEBUG"yaffs_read_super: Failed trying to allocate yaffs_Device. Terminating debug.\n");
1376 memset(dev,0,sizeof(yaffs_Device));
1377 dev->genericDevice = mtd;
1379 // Set up the memory size parameters....
1381 nBlocks = mtd->size / (YAFFS_CHUNKS_PER_BLOCK * YAFFS_BYTES_PER_CHUNK);
1382 dev->startBlock = 1; // Don't use block 0
1383 dev->endBlock = nBlocks - 1;
1384 dev->nChunksPerBlock = YAFFS_CHUNKS_PER_BLOCK;
1385 dev->nBytesPerChunk = YAFFS_BYTES_PER_CHUNK;
1386 dev->nReservedBlocks = 5;
1387 dev->nShortOpCaches = 10; // Enable short op caching
1390 // ... and the functions.
1391 dev->writeChunkToNAND = nandmtd_WriteChunkToNAND;
1392 dev->readChunkFromNAND = nandmtd_ReadChunkFromNAND;
1393 dev->eraseBlockInNAND = nandmtd_EraseBlockInNAND;
1394 dev->initialiseNAND = nandmtd_InitialiseNAND;
1396 dev->putSuperFunc = yaffs_MTDPutSuper;
1398 #ifdef CONFIG_YAFFS_USE_NANDECC
1399 dev->useNANDECC = 1;
1407 init_MUTEX(&dev->grossLock);
1410 yaffs_GrossLock(dev);
1411 yaffs_GutsInitialise(yaffs_SuperToDevice(sb));
1413 T(YAFFS_TRACE_OS,("yaffs_read_super: guts initialised\n"));
1415 // Create root inode
1416 inode = yaffs_get_inode(sb, S_IFDIR | 0755, 0,yaffs_Root(yaffs_SuperToDevice(sb)));
1418 yaffs_GrossUnlock(dev);
1424 inode->i_op = & yaffs_dir_inode_operations;
1425 inode->i_fop = & yaffs_dir_operations;
1427 T(YAFFS_TRACE_OS,("yaffs_read_super: got root inode\n"));
1430 root = d_alloc_root(inode);
1432 T(YAFFS_TRACE_OS,("yaffs_read_super: d_alloc_root done\n"));
1440 T(YAFFS_TRACE_OS,("yaffs_read_super: done\n"));
1444 static int yaffs_internal_read_super_ram(struct super_block * sb, void * data, int silent)
1446 return yaffs_internal_read_super(1,sb,data,silent) ? 0 : -1;
1448 static int yaffs_internal_read_super_mtd(struct super_block * sb, void * data, int silent)
1450 return yaffs_internal_read_super(0,sb,data,silent) ? 0 : -1;
1454 #ifdef CONFIG_YAFFS_MTD_ENABLED
1455 #if defined(CONFIG_KERNEL_2_5)
1456 static struct super_block *yaffs_read_super(struct file_system_type * fs, int flags, const char *dev_name, void *data)
1459 return get_sb_bdev(fs, flags, dev_name, data, yaffs_internal_read_super_mtd);
1462 /* changes NCB 2.5.70 */
1463 //static DECLARE_FSTYPE(yaffs_fs_type, "yaffs", yaffs_read_super, FS_REQUIRES_DEV);
1464 static struct file_system_type yaffs_fs_type = {
1465 .owner = THIS_MODULE,
1467 .get_sb = yaffs_read_super,
1468 // .kill_sb = kill_block_super,
1469 .kill_sb = kill_litter_super,
1470 .fs_flags = FS_REQUIRES_DEV,
1473 static struct super_block *yaffs_read_super(struct super_block * sb, void * data, int silent)
1475 return yaffs_internal_read_super(0,sb,data,silent);
1478 static DECLARE_FSTYPE(yaffs_fs_type, "yaffs", yaffs_read_super, FS_REQUIRES_DEV);
1482 #ifdef CONFIG_YAFFS_RAM_ENABLED
1484 #if defined(CONFIG_KERNEL_2_5)
1485 static struct super_block *yaffs_ram_read_super(struct file_system_type * fs, int flags, const char *dev_name, void *data)
1488 return get_sb_bdev(fs, flags, dev_name, data, yaffs_internal_read_super_ram);
1491 /* changes NCB 2.5.70 */
1492 //static DECLARE_FSTYPE(yaffs_fs_type, "yaffs", yaffs_read_super, FS_REQUIRES_DEV);
1493 static struct file_system_type yaffs_fs_type = {
1494 .owner = THIS_MODULE,
1496 .get_sb = yaffs_ram_read_super,
1497 // .kill_sb = kill_block_super,
1498 .kill_sb = kill_litter_super,
1499 .fs_flags = FS_SINGLE,
1502 static struct super_block *yaffs_ram_read_super(struct super_block * sb, void * data, int silent)
1504 return yaffs_internal_read_super(1,sb,data,silent);
1507 static DECLARE_FSTYPE(yaffs_ram_fs_type, "yaffsram", yaffs_ram_read_super, FS_SINGLE);
1509 #endif // CONFIG_YAFFS_RAM_ENABLED
1512 static struct proc_dir_entry *my_proc_entry;
1513 static struct proc_dir_entry *my_proc_ram_write_entry;
1515 static char * yaffs_dump_dev(char *buf,yaffs_Device *dev,char *name)
1517 buf +=sprintf(buf,"\nDevice %s\n",name);
1518 buf +=sprintf(buf,"startBlock......... %d\n",dev->startBlock);
1519 buf +=sprintf(buf,"endBlock........... %d\n",dev->endBlock);
1520 buf +=sprintf(buf,"chunkGroupBits..... %d\n",dev->chunkGroupBits);
1521 buf +=sprintf(buf,"chunkGroupSize..... %d\n",dev->chunkGroupSize);
1522 buf +=sprintf(buf,"nErasedBlocks...... %d\n",dev->nErasedBlocks);
1523 buf +=sprintf(buf,"nTnodesCreated..... %d\n",dev->nTnodesCreated);
1524 buf +=sprintf(buf,"nFreeTnodes........ %d\n",dev->nFreeTnodes);
1525 buf +=sprintf(buf,"nObjectsCreated.... %d\n",dev->nObjectsCreated);
1526 buf +=sprintf(buf,"nFreeObjects....... %d\n",dev->nFreeObjects);
1527 buf +=sprintf(buf,"nFreeChunks........ %d\n",dev->nFreeChunks);
1528 buf +=sprintf(buf,"nPageWrites........ %d\n",dev->nPageWrites);
1529 buf +=sprintf(buf,"nPageReads......... %d\n",dev->nPageReads);
1530 buf +=sprintf(buf,"nBlockErasures..... %d\n",dev->nBlockErasures);
1531 buf +=sprintf(buf,"nGCCopies.......... %d\n",dev->nGCCopies);
1532 buf +=sprintf(buf,"garbageCollections. %d\n",dev->garbageCollections);
1533 buf +=sprintf(buf,"passiveGCs......... %d\n",dev->passiveGarbageCollections);
1534 buf +=sprintf(buf,"nRetriedWrites..... %d\n",dev->nRetriedWrites);
1535 buf +=sprintf(buf,"nRetireBlocks...... %d\n",dev->nRetiredBlocks);
1536 buf +=sprintf(buf,"eccFixed........... %d\n",dev->eccFixed);
1537 buf +=sprintf(buf,"eccUnfixed......... %d\n",dev->eccUnfixed);
1538 buf +=sprintf(buf,"tagsEccFixed....... %d\n",dev->tagsEccFixed);
1539 buf +=sprintf(buf,"tagsEccUnfixed..... %d\n",dev->tagsEccUnfixed);
1540 buf +=sprintf(buf,"cacheHits.......... %d\n",dev->cacheHits);
1541 buf +=sprintf(buf,"nDeletedFiles...... %d\n",dev->nDeletedFiles);
1542 buf +=sprintf(buf,"nUnlinkedFiles..... %d\n",dev->nUnlinkedFiles);
1543 buf +=sprintf(buf,"nBackgroudDeletions %d\n",dev->nBackgroundDeletions);
1544 buf +=sprintf(buf,"useNANDECC......... %d\n",dev->useNANDECC);
1550 static int yaffs_proc_read(
1560 char my_buffer[3000];
1564 if (offset > 0) return 0;
1566 /* Fill the buffer and get its length */
1567 buf +=sprintf(buf,"YAFFS built:"__DATE__ " "__TIME__"\n%s\n%s\n", yaffs_fs_c_version,yaffs_guts_c_version);
1569 if(yaffs_dev) buf = yaffs_dump_dev(buf,yaffs_dev,"yaffs");
1570 if(yaffsram_dev) buf = yaffs_dump_dev(buf,yaffsram_dev,"yaffsram");
1573 strcpy(page,my_buffer);
1574 return strlen(my_buffer);
1578 static int yaffs_proc_ram_write(
1588 printk(KERN_DEBUG "yaffs write size %d\n",count);
1592 static int __init init_yaffs_fs(void)
1596 yaffs_dev = yaffsram_dev = NULL;
1598 printk(KERN_DEBUG "yaffs " __DATE__ " " __TIME__ " Initialisation\n");
1599 #ifdef CONFIG_YAFFS_USE_GENERIC_RW
1600 printk(KERN_DEBUG "yaffs is using generic read/write (caching)\n");
1602 printk(KERN_DEBUG "yaffs is using direct read/write (uncached)\n");
1606 /* Install the proc_fs entry */
1607 my_proc_entry = create_proc_read_entry("yaffs",
1617 #ifdef CONFIG_YAFFS_RAM_ENABLED
1619 my_proc_ram_write_entry = create_proc_entry("yaffs_ram",
1623 if(!my_proc_ram_write_entry)
1629 my_proc_ram_write_entry->write_proc = yaffs_proc_ram_write;
1633 error = register_filesystem(&yaffs_ram_fs_type);
1638 #endif //CONFIG_YAFFS_RAM_ENABLED
1640 #ifdef CONFIG_YAFFS_MTD_ENABLED
1641 error = register_filesystem(&yaffs_fs_type);
1644 #ifdef CONFIG_YAFFS_RAM_ENABLED
1645 unregister_filesystem(&yaffs_ram_fs_type);
1646 #endif //CONFIG_YAFFS_RAM_ENABLED
1648 #endif // CONFIG_YAFFS_MTD_ENABLED
1653 static void __exit exit_yaffs_fs(void)
1655 printk(KERN_DEBUG "yaffs " __DATE__ " " __TIME__ " Clean up\n");
1657 remove_proc_entry("yaffs",&proc_root);
1659 #ifdef CONFIG_YAFFS_RAM_ENABLED
1660 unregister_filesystem(&yaffs_ram_fs_type);
1662 #ifdef CONFIG_YAFFS_MTD_ENABLED
1663 unregister_filesystem(&yaffs_fs_type);
1668 module_init(init_yaffs_fs)
1669 module_exit(exit_yaffs_fs)
1671 MODULE_DESCRIPTION("YAFFS - a NAND specific flash file system");
1672 MODULE_AUTHOR("Charles Manning, Aleph One Ltd., 2002");
1673 MODULE_LICENSE("GPL");