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 * >> 2.4: sb->u.generic_sbp points to the yaffs_Device associated with this superblock
19 * >> 2.6: sb->s_fs_info points to the yaffs_Device associated with this superblock
20 * >> inode->u.generic_ip points to the associated yaffs_Object.
24 * * Luc van OostenRyck for numerous patches.
25 * * Nick Bane for numerous patches.
26 * * Nick Bane for 2.5/2.6 integration.
27 * * Andras Toth for mknod rdev issue.
28 * * Michael Fischer for finding the problem with inode inconsistency.
29 * * Some code bodily lifted from JFFS2.
33 const char *yaffs_fs_c_version = "$Id: yaffs_fs.c,v 1.11 2005-07-26 23:04:34 charles Exp $";
34 extern const char *yaffs_guts_c_version;
38 #include <linux/config.h>
39 #include <linux/kernel.h>
40 #include <linux/module.h>
41 #include <linux/version.h>
42 #include <linux/slab.h>
43 #include <linux/init.h>
44 #include <linux/list.h>
46 #include <linux/proc_fs.h>
47 #include <linux/smp_lock.h>
48 #include <linux/pagemap.h>
49 #include <linux/mtd/mtd.h>
50 #include <linux/interrupt.h>
51 #include <linux/string.h>
54 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2,5,0))
56 #include <linux/statfs.h> /* Added NCB 15-8-2003 */
57 #include <asm/statfs.h>
58 #define UnlockPage(p) unlock_page(p)
59 #define Page_Uptodate(page) test_bit(PG_uptodate, &(page)->flags)
60 //#define kdevname(x) cdevname(to_kdev_t(x))
61 #define kdevname(x) "(unavailable)" // temporary fix
65 #include <linux/locks.h>
69 #include <asm/uaccess.h>
72 #include "yaffs_guts.h"
77 unsigned yaffs_traceMask = YAFFS_TRACE_ALWAYS | YAFFS_TRACE_BAD_BLOCKS;
78 //unsigned yaffs_traceMask = 0xFFFFFFFF;
81 #ifdef CONFIG_YAFFS_RAM_ENABLED
82 #include "yaffs_nandemul.h"
83 // 2 MB of RAM for emulation
84 #define YAFFS_RAM_EMULATION_SIZE 0x200000
85 #endif //CONFIG_YAFFS_RAM_ENABLED
87 #if CONFIG_YAFFS2_RAM_ENABLED
88 #include "yaffs_nandemul2k.h"
91 #ifdef CONFIG_YAFFS_MTD_ENABLED
92 #include <linux/mtd/mtd.h>
93 #include "yaffs_mtdif.h"
94 #include "yaffs_mtdif2.h"
95 #endif //CONFIG_YAFFS_MTD_ENABLED
97 //#define T(x) printk x
101 #define yaffs_InodeToObject(iptr) ((yaffs_Object *)((iptr)->u.generic_ip))
102 #define yaffs_DentryToObject(dptr) yaffs_InodeToObject((dptr)->d_inode)
103 //NCB #define yaffs_SuperToDevice(sb) ((yaffs_Device *)sb->u.generic_sbp)
105 //#if defined(CONFIG_KERNEL_2_5)
106 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2,5,0))
107 #define yaffs_SuperToDevice(sb) ((yaffs_Device *)sb->s_fs_info)
109 #define yaffs_SuperToDevice(sb) ((yaffs_Device *)sb->u.generic_sbp)
113 static void yaffs_put_super(struct super_block *sb);
116 static ssize_t yaffs_file_read(struct file *f, char *buf, size_t n, loff_t *pos);
119 static ssize_t yaffs_file_write(struct file *f, const char *buf, size_t n, loff_t *pos);
121 static int yaffs_file_flush(struct file* file);
123 static int yaffs_sync_object(struct file * file, struct dentry *dentry, int datasync);
125 static int yaffs_readdir(struct file *f, void *dirent, filldir_t filldir);
127 //#if defined(CONFIG_KERNEL_2_5) /* Added NCB 185-8-2003 */
128 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2,5,0))
129 static int yaffs_create(struct inode *dir, struct dentry *dentry, int mode, struct nameidata *n);
130 static struct dentry * yaffs_lookup(struct inode *dir, struct dentry *dentry, struct nameidata *n);
132 static int yaffs_create(struct inode *dir, struct dentry *dentry, int mode);
133 static struct dentry * yaffs_lookup(struct inode *dir, struct dentry *dentry);
135 static int yaffs_link(struct dentry *old_dentry, struct inode * dir, struct dentry * dentry);
136 static int yaffs_unlink(struct inode * dir, struct dentry *dentry);
137 static int yaffs_symlink(struct inode * dir, struct dentry *dentry, const char * symname);
138 static int yaffs_mkdir(struct inode * dir, struct dentry * dentry, int mode);
140 //#if defined(CONFIG_KERNEL_2_5)
141 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2,5,0))
142 static int yaffs_mknod(struct inode *dir, struct dentry *dentry, int mode, dev_t dev);
144 static int yaffs_mknod(struct inode *dir, struct dentry *dentry, int mode, int dev);
146 static int yaffs_rename(struct inode * old_dir, struct dentry *old_dentry, struct inode * new_dir,struct dentry *new_dentry);
147 static int yaffs_setattr(struct dentry *dentry, struct iattr *attr);
149 //#if defined(CONFIG_KERNEL_2_5) /* Added NCB 185-8-2003 */
150 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2,5,0))
151 static int yaffs_statfs(struct super_block *sb, struct kstatfs *buf);
153 static int yaffs_statfs(struct super_block *sb, struct statfs *buf);
155 static void yaffs_read_inode (struct inode *inode);
157 //#if defined(CONFIG_KERNEL_2_5)
158 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2,5,0))
159 static struct super_block *yaffs_read_super(struct file_system_type * fs, int flags, const char *dev_name, void *data);
161 static struct super_block *yaffs_read_super(struct super_block * sb, void * data, int silent);
164 static void yaffs_put_inode (struct inode *inode);
165 static void yaffs_delete_inode(struct inode *);
166 static void yaffs_clear_inode(struct inode *);
168 static int yaffs_readpage(struct file *file, struct page * page);
169 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2,5,0))
170 static int yaffs_writepage(struct page *page, struct writeback_control *wbc);
172 static int yaffs_writepage(struct page *page);
174 static int yaffs_prepare_write(struct file *f, struct page *pg, unsigned offset, unsigned to);
175 static int yaffs_commit_write(struct file *f, struct page *pg, unsigned offset, unsigned to);
177 static int yaffs_readlink(struct dentry *dentry, char __user *buffer, int buflen);
178 static int yaffs_follow_link(struct dentry *dentry, struct nameidata *nd);
183 static struct address_space_operations yaffs_file_address_operations = {
184 .readpage= yaffs_readpage,
185 .writepage= yaffs_writepage,
186 .prepare_write= yaffs_prepare_write,
187 .commit_write= yaffs_commit_write
191 static struct file_operations yaffs_file_operations = {
193 .read= generic_file_read,
194 .write= generic_file_write,
196 .mmap= generic_file_mmap,
197 .flush= yaffs_file_flush,
198 .fsync= yaffs_sync_object,
202 static struct inode_operations yaffs_file_inode_operations = {
203 .setattr= yaffs_setattr,
207 struct inode_operations yaffs_symlink_inode_operations =
209 .readlink= yaffs_readlink,
210 .follow_link= yaffs_follow_link,
211 .setattr= yaffs_setattr
214 static struct inode_operations yaffs_dir_inode_operations = {
215 .create= yaffs_create,
216 .lookup= yaffs_lookup,
218 .unlink= yaffs_unlink,
219 .symlink= yaffs_symlink,
221 .rmdir= yaffs_unlink,
223 .rename= yaffs_rename,
224 .setattr= yaffs_setattr,
227 static struct file_operations yaffs_dir_operations = {
228 .read= generic_read_dir,
229 .readdir= yaffs_readdir,
230 .fsync= yaffs_sync_object,
234 static struct super_operations yaffs_super_ops = {
235 .statfs= yaffs_statfs,
236 .read_inode= yaffs_read_inode,
237 .put_inode= yaffs_put_inode,
238 .put_super= yaffs_put_super,
239 .delete_inode= yaffs_delete_inode,
240 .clear_inode= yaffs_clear_inode,
245 static void yaffs_GrossLock(yaffs_Device *dev)
247 T(YAFFS_TRACE_OS,(KERN_DEBUG"yaffs locking\n"));
249 down(&dev->grossLock);
252 static void yaffs_GrossUnlock(yaffs_Device *dev)
254 T(YAFFS_TRACE_OS,(KERN_DEBUG"yaffs unlocking\n"));
259 static int yaffs_readlink(struct dentry *dentry, char __user *buffer, int buflen)
261 unsigned char *alias;
264 yaffs_Device *dev = yaffs_DentryToObject(dentry)->myDev;
267 yaffs_GrossLock(dev);
269 alias = yaffs_GetSymlinkAlias(yaffs_DentryToObject(dentry));
271 yaffs_GrossUnlock(dev);
276 ret = vfs_readlink(dentry, buffer, buflen, alias);
281 static int yaffs_follow_link(struct dentry *dentry, struct nameidata *nd)
283 unsigned char *alias;
285 yaffs_Device *dev = yaffs_DentryToObject(dentry)->myDev;
288 yaffs_GrossLock(dev);
290 alias = yaffs_GetSymlinkAlias(yaffs_DentryToObject(dentry));
292 yaffs_GrossUnlock(dev);
297 ret = vfs_follow_link(nd,alias);
303 struct inode *yaffs_get_inode(struct super_block *sb, int mode, int dev,yaffs_Object *obj);
306 * Lookup is used to find objects in the fs
308 //#if defined(CONFIG_KERNEL_2_5) /* Added NCB 185-8-2003 */
309 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2,5,0))
311 static struct dentry * yaffs_lookup(struct inode *dir, struct dentry *dentry, struct nameidata *n)
313 static struct dentry * yaffs_lookup(struct inode *dir, struct dentry *dentry)
317 struct inode *inode = NULL; // NCB 2.5/2.6 needs NULL here
319 yaffs_Device *dev = yaffs_InodeToObject(dir)->myDev;
322 yaffs_GrossLock(dev);
325 T(YAFFS_TRACE_OS,(KERN_DEBUG"yaffs_lookup for %d:%s\n",yaffs_InodeToObject(dir)->objectId,dentry->d_name.name));
327 obj = yaffs_FindObjectByName(yaffs_InodeToObject(dir),dentry->d_name.name);
329 obj = yaffs_GetEquivalentObject(obj); // in case it was a hardlink
335 T(YAFFS_TRACE_OS,(KERN_DEBUG"yaffs_lookup found %d\n",obj->objectId));
337 inode = yaffs_get_inode(dir->i_sb, obj->yst_mode,0,obj);
341 T(YAFFS_TRACE_OS,(KERN_DEBUG"yaffs_loookup dentry \n"));
342 /* #if 0 asserted by NCB for 2.5/6 compatability - falls through to d_add even if NULL inode */
344 //dget(dentry); // try to solve directory bug
347 yaffs_GrossUnlock(dev);
357 T(YAFFS_TRACE_OS,(KERN_DEBUG"yaffs_lookup not found\n"));
360 yaffs_GrossUnlock(dev);
362 /* added NCB for 2.5/6 compatability - forces add even if inode is NULL which creates dentry hash*/
366 // return (ERR_PTR(-EIO));
370 // For now put inode is just for debugging
371 // Put inode is called when the inode **structure** is put.
372 static void yaffs_put_inode(struct inode *inode)
374 T(YAFFS_TRACE_OS,("yaffs_put_inode: ino %d, count %d\n",(int)inode->i_ino, atomic_read(&inode->i_count)));
378 // clear is called to tell the fs to release any per-inode data it holds
379 static void yaffs_clear_inode(struct inode *inode)
384 obj = yaffs_InodeToObject(inode);
386 T(YAFFS_TRACE_OS,("yaffs_clear_inode: ino %d, count %d %s\n",(int)inode->i_ino, atomic_read(&inode->i_count),
387 obj ? "object exists" : "null object"));
392 yaffs_GrossLock(dev);
394 // Clear the association between the inode ant the yaffs_Object.
396 inode->u.generic_ip = NULL;
398 // If the object freeing was deferred, then the real free happens now.
399 // This should fix the inode inconsistency problem.
401 yaffs_HandleDeferedFree(obj);
403 yaffs_GrossUnlock(dev);
409 // delete is called when the link count is zero and the inode
410 // is put (ie. nobody wants to know about it anymore, time to
412 // NB Must call clear_inode()
413 static void yaffs_delete_inode(struct inode *inode)
415 yaffs_Object *obj = yaffs_InodeToObject(inode);
418 T(YAFFS_TRACE_OS,("yaffs_delete_inode: ino %d, count %d %s\n",(int)inode->i_ino, atomic_read(&inode->i_count),
419 obj ? "object exists" : "null object"));
424 yaffs_GrossLock(dev);
425 yaffs_DeleteFile(obj);
426 yaffs_GrossUnlock(dev);
432 static int yaffs_file_flush(struct file* file)
434 yaffs_Object *obj = yaffs_DentryToObject(file->f_dentry);
436 yaffs_Device *dev = obj->myDev;
438 T(YAFFS_TRACE_OS,(KERN_DEBUG"yaffs_file_flush object %d (%s)\n",obj->objectId,
439 obj->dirty ? "dirty" : "clean"));
441 yaffs_GrossLock(dev);
443 yaffs_FlushFile(obj,1);
445 yaffs_GrossUnlock(dev);
452 static int yaffs_readpage_nolock(struct file *f, struct page * pg)
457 unsigned char *pg_buf;
462 T(YAFFS_TRACE_OS,(KERN_DEBUG"yaffs_readpage at %08x, size %08x\n",
463 (unsigned)(pg->index << PAGE_CACHE_SHIFT), (unsigned)PAGE_CACHE_SIZE));
465 obj = yaffs_DentryToObject(f->f_dentry);
470 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2,5,0))
471 BUG_ON(!PageLocked(pg));
478 /* FIXME: Can kmap fail? */
480 yaffs_GrossLock(dev);
482 ret = yaffs_ReadDataFromFile(obj, pg_buf, pg->index << PAGE_CACHE_SHIFT, PAGE_CACHE_SIZE);
484 yaffs_GrossUnlock(dev);
486 if(ret >= 0) ret = 0;
489 ClearPageUptodate(pg);
496 flush_dcache_page(pg);
500 T(YAFFS_TRACE_OS,(KERN_DEBUG"yaffs_readpage done\n"));
504 static int yaffs_readpage_unlock(struct file *f, struct page *pg)
506 int ret = yaffs_readpage_nolock(f,pg);
511 static int yaffs_readpage(struct file *f, struct page * pg)
513 return yaffs_readpage_unlock(f,pg);
516 // writepage inspired by/stolen from smbfs
519 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2,5,0))
520 static int yaffs_writepage(struct page *page, struct writeback_control *wbc)
522 static int yaffs_writepage(struct page *page)
525 struct address_space *mapping = page->mapping;
527 unsigned long end_index;
535 inode = mapping->host;
539 end_index = inode->i_size >> PAGE_CACHE_SHIFT;
542 if (page->index < end_index)
544 nBytes = PAGE_CACHE_SIZE;
548 nBytes = inode->i_size & (PAGE_CACHE_SIZE-1);
550 // What's happening here?
551 ///* OK, are we completely out? */
552 //if (page->index >= end_index+1 || !offset)
560 obj = yaffs_InodeToObject(inode);
561 yaffs_GrossLock(obj->myDev);
564 nWritten = yaffs_WriteDataToFile(obj,buffer,page->index << PAGE_CACHE_SHIFT,nBytes,0);
566 yaffs_GrossUnlock(obj->myDev);
569 SetPageUptodate(page);
573 return (nWritten == nBytes) ? 0 : -ENOSPC;
578 static int yaffs_prepare_write(struct file *f, struct page *pg, unsigned offset, unsigned to)
581 T(YAFFS_TRACE_OS,(KERN_DEBUG"yaffs_prepair_write\n"));
582 if(!Page_Uptodate(pg) && (offset || to < PAGE_CACHE_SIZE))
583 return yaffs_readpage_nolock(f,pg);
589 static int yaffs_commit_write(struct file *f, struct page *pg, unsigned offset, unsigned to)
592 void *addr = page_address(pg) + offset;
593 loff_t pos = (((loff_t)pg->index) << PAGE_CACHE_SHIFT) + offset;
594 int nBytes = to - offset;
598 unsigned saddr = (unsigned)addr;
600 T(YAFFS_TRACE_OS,(KERN_DEBUG"yaffs_commit_write addr %x pos %x nBytes %d\n",saddr,spos,nBytes));
602 nWritten = yaffs_file_write(f,addr, nBytes, &pos);
604 if(nWritten != nBytes)
606 T(YAFFS_TRACE_OS,(KERN_DEBUG"yaffs_commit_write not same size nWritten %d nBytes %d\n",nWritten,nBytes));
608 ClearPageUptodate(pg);
615 T(YAFFS_TRACE_OS,(KERN_DEBUG"yaffs_commit_write returning %d\n",nWritten));
623 static void yaffs_FillInodeFromObject(struct inode *inode, yaffs_Object *obj)
627 inode->i_ino = obj->objectId;
628 inode->i_mode = obj->yst_mode;
629 inode->i_uid = obj->yst_uid;
630 inode->i_gid = obj->yst_gid;
631 inode->i_blksize = inode->i_sb->s_blocksize;
632 //#if defined(CONFIG_KERNEL_2_5)
633 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2,5,0))
635 inode->i_rdev = old_decode_dev(obj->yst_rdev);
636 inode->i_atime.tv_sec = (time_t)(obj->yst_atime);
637 inode->i_atime.tv_nsec = 0;
638 inode->i_mtime.tv_sec = (time_t)obj->yst_mtime;
639 inode->i_mtime.tv_nsec =0;
640 inode->i_ctime.tv_sec = (time_t)obj->yst_ctime;
641 inode->i_ctime.tv_nsec = 0;
643 inode->i_rdev = obj->yst_rdev;
644 inode->i_atime = obj->yst_atime;
645 inode->i_mtime = obj->yst_mtime;
646 inode->i_ctime = obj->yst_ctime;
648 inode->i_size = yaffs_GetObjectFileLength(obj);
649 inode->i_blocks = (inode->i_size + 511) >> 9;
651 inode->i_nlink = yaffs_GetObjectLinkCount(obj);
653 T(YAFFS_TRACE_OS,(KERN_DEBUG"yaffs_FillInode mode %x uid %d gid %d size %d count %d\n",
654 inode->i_mode, inode->i_uid, inode->i_gid, (int)inode->i_size, atomic_read(&inode->i_count)));
656 switch (obj->yst_mode & S_IFMT)
658 default: // fifo, device or socket
659 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2,5,0))
660 init_special_inode(inode, obj->yst_mode,old_decode_dev(obj->yst_rdev));
662 init_special_inode(inode, obj->yst_mode,(dev_t)(obj->yst_rdev));
665 case S_IFREG: // file
666 inode->i_op = &yaffs_file_inode_operations;
667 inode->i_fop = &yaffs_file_operations;
668 inode->i_mapping->a_ops = &yaffs_file_address_operations;
670 case S_IFDIR: // directory
671 inode->i_op = &yaffs_dir_inode_operations;
672 inode->i_fop = &yaffs_dir_operations;
674 case S_IFLNK: // symlink
675 inode->i_op = &yaffs_symlink_inode_operations;
680 inode->u.generic_ip = obj;
681 obj->myInode = inode;
686 T(YAFFS_TRACE_OS,(KERN_DEBUG"yaffs_FileInode invalid parameters\n"));
691 struct inode *yaffs_get_inode(struct super_block *sb, int mode, int dev,yaffs_Object *obj)
693 struct inode * inode;
697 T(YAFFS_TRACE_OS,(KERN_DEBUG"yaffs_get_inode for NULL super_block!!\n"));
704 T(YAFFS_TRACE_OS,(KERN_DEBUG"yaffs_get_inode for NULL object!!\n"));
709 T(YAFFS_TRACE_OS,(KERN_DEBUG"yaffs_get_inode for object %d\n",obj->objectId));
711 inode = iget(sb,obj->objectId);
713 // NB Side effect: iget calls back to yaffs_read_inode().
714 // iget also increments the inode's i_count
721 // No longer used because we use generic rw */
722 static ssize_t yaffs_file_read(struct file *f, char *buf, size_t n, loff_t *pos)
729 T(YAFFS_TRACE_OS,(KERN_DEBUG"yaffs_file_read\n"));
731 obj = yaffs_DentryToObject(f->f_dentry);
735 yaffs_GrossLock(dev);
737 inode = f->f_dentry->d_inode;
739 if (*pos < inode->i_size)
741 if (*pos + n > inode->i_size)
743 n = inode->i_size - *pos;
751 nRead = yaffs_ReadDataFromFile(obj,buf,*pos,n);
757 yaffs_GrossUnlock(dev);
761 T(YAFFS_TRACE_OS,(KERN_DEBUG"yaffs_file_read read %d bytes, %d read at %d\n",n,nRead,ipos));
768 static ssize_t yaffs_file_write(struct file *f, const char *buf, size_t n, loff_t *pos)
776 obj = yaffs_DentryToObject(f->f_dentry);
780 yaffs_GrossLock(dev);
782 inode = f->f_dentry->d_inode;
784 if(!S_ISBLK(inode->i_mode) && f->f_flags & O_APPEND)
786 ipos = inode->i_size;
796 T(YAFFS_TRACE_OS,(KERN_DEBUG"yaffs_file_write: hey obj is null!\n"));
800 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));
803 nWritten = yaffs_WriteDataToFile(obj,buf,ipos,n,0);
805 T(YAFFS_TRACE_OS,(KERN_DEBUG"yaffs_file_write writing %d bytes, %d written at %d\n",n,nWritten,ipos));
810 if(ipos > inode->i_size)
812 inode->i_size = ipos;
813 inode->i_blocks = (ipos + 511)>>9;
815 T(YAFFS_TRACE_OS,(KERN_DEBUG"yaffs_file_write size updated to %d bytes, %d blocks\n",ipos,(int)(inode->i_blocks)));
819 yaffs_GrossUnlock(dev);
821 return nWritten != n ? -ENOSPC : nWritten;
826 static int yaffs_readdir(struct file *f, void *dirent, filldir_t filldir)
830 struct inode *inode = f->f_dentry->d_inode;
831 unsigned long offset, curoffs;
835 char name[YAFFS_MAX_NAME_LENGTH +1];
837 obj = yaffs_DentryToObject(f->f_dentry);
840 yaffs_GrossLock(dev);
844 T(YAFFS_TRACE_OS,("yaffs_readdir: starting at %d\n",(int)offset));
848 T(YAFFS_TRACE_OS,(KERN_DEBUG"yaffs_readdir: entry . ino %d \n",(int)inode->i_ino));
849 if(filldir(dirent,".",1,offset,inode->i_ino,DT_DIR) < 0)
858 T(YAFFS_TRACE_OS,(KERN_DEBUG"yaffs_readdir: entry .. ino %d \n",(int)f->f_dentry->d_parent->d_inode->i_ino));
859 if(filldir(dirent,"..",2,offset,f->f_dentry->d_parent->d_inode->i_ino,DT_DIR) < 0)
869 list_for_each(i,&obj->variant.directoryVariant.children)
872 if(curoffs >= offset)
874 l = list_entry(i, yaffs_Object,siblings);
876 yaffs_GetObjectName(l,name,YAFFS_MAX_NAME_LENGTH+1);
877 T(YAFFS_TRACE_OS,(KERN_DEBUG"yaffs_readdir: %s inode %d\n",name,yaffs_GetObjectInode(l)));
883 yaffs_GetObjectInode(l),
884 yaffs_GetObjectType(l))
898 yaffs_GrossUnlock(dev);
905 * File creation. Allocate an inode, and we're done..
907 //#if defined(CONFIG_KERNEL_2_5)
908 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2,5,0))
909 static int yaffs_mknod(struct inode *dir, struct dentry *dentry, int mode, dev_t rdev)
911 static int yaffs_mknod(struct inode *dir, struct dentry *dentry, int mode, int rdev)
916 yaffs_Object *obj = NULL;
919 yaffs_Object *parent = yaffs_InodeToObject(dir);
925 T(YAFFS_TRACE_OS,(KERN_DEBUG"yaffs_mknod: parent object %d type %d\n",
926 parent->objectId,parent->variantType));
930 T(YAFFS_TRACE_OS,(KERN_DEBUG"yaffs_mknod: could not get parent object\n"));
934 T(YAFFS_TRACE_OS,("yaffs_mknod: making oject for %s, mode %x dev %x\n",
935 dentry->d_name.name, mode,rdev));
939 yaffs_GrossLock(dev);
941 switch (mode & S_IFMT)
944 // Special (socket, fifo, device...)
945 T(YAFFS_TRACE_OS,(KERN_DEBUG"yaffs_mknod: making special\n"));
946 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2,5,0))
947 obj = yaffs_MknodSpecial(parent,dentry->d_name.name,mode,current->uid, current->gid,old_encode_dev(rdev));
949 obj = yaffs_MknodSpecial(parent,dentry->d_name.name,mode,current->uid, current->gid,rdev);
952 case S_IFREG: // file
953 T(YAFFS_TRACE_OS,(KERN_DEBUG"yaffs_mknod: making file\n"));
954 obj = yaffs_MknodFile(parent,dentry->d_name.name,mode,current->uid, current->gid);
956 case S_IFDIR: // directory
957 T(YAFFS_TRACE_OS,(KERN_DEBUG"yaffs_mknod: making directory\n"));
958 obj = yaffs_MknodDirectory(parent,dentry->d_name.name,mode,current->uid, current->gid);
960 case S_IFLNK: // symlink
961 T(YAFFS_TRACE_OS,(KERN_DEBUG"yaffs_mknod: making file\n"));
962 obj = NULL; // Do we ever get here?
968 inode = yaffs_get_inode(dir->i_sb, mode, rdev, obj);
969 d_instantiate(dentry, inode);
970 T(YAFFS_TRACE_OS,(KERN_DEBUG"yaffs_mknod created object %d count = %d\n",obj->objectId,atomic_read(&inode->i_count)));
975 T(YAFFS_TRACE_OS,(KERN_DEBUG"yaffs_mknod failed making object\n"));
979 yaffs_GrossUnlock(dev);
984 static int yaffs_mkdir(struct inode * dir, struct dentry * dentry, int mode)
987 T(YAFFS_TRACE_OS,(KERN_DEBUG"yaffs_mkdir\n"));
988 retVal = yaffs_mknod(dir, dentry, mode | S_IFDIR, 0);
990 // attempt to fix dir bug - didn't work
999 //#if defined(CONFIG_KERNEL_2_5) /* Added NCB 185-8-2003 */
1000 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2,5,0))
1001 static int yaffs_create(struct inode *dir, struct dentry *dentry, int mode, struct nameidata *n)
1003 static int yaffs_create(struct inode *dir, struct dentry *dentry, int mode)
1006 T(YAFFS_TRACE_OS,(KERN_DEBUG"yaffs_create\n"));
1007 return yaffs_mknod(dir, dentry, mode | S_IFREG, 0);
1011 static int yaffs_unlink(struct inode * dir, struct dentry *dentry)
1018 T(YAFFS_TRACE_OS,(KERN_DEBUG"yaffs_unlink %d:%s\n",(int)(dir->i_ino),dentry->d_name.name));
1020 dev = yaffs_InodeToObject(dir)->myDev;
1022 yaffs_GrossLock(dev);
1025 retVal = yaffs_Unlink(yaffs_InodeToObject(dir),dentry->d_name.name);
1028 yaffs_GrossUnlock(dev);
1030 if( retVal == YAFFS_OK)
1032 dentry->d_inode->i_nlink--;
1033 mark_inode_dirty(dentry->d_inode);
1046 static int yaffs_link(struct dentry *old_dentry, struct inode * dir, struct dentry * dentry)
1048 struct inode *inode = old_dentry->d_inode;
1049 yaffs_Object *obj = NULL;
1050 yaffs_Object *link=NULL;
1053 T(YAFFS_TRACE_OS,(KERN_DEBUG"yaffs_link\n"));
1055 obj = yaffs_InodeToObject(inode);
1058 yaffs_GrossLock(dev);
1060 if (!S_ISDIR(inode->i_mode)) // Don't link directories
1062 link = yaffs_Link(yaffs_InodeToObject(dir),dentry->d_name.name,obj);
1068 old_dentry->d_inode->i_nlink = yaffs_GetObjectLinkCount(obj);
1069 d_instantiate(dentry, old_dentry->d_inode);
1070 atomic_inc(&old_dentry->d_inode->i_count);
1071 T(YAFFS_TRACE_OS,(KERN_DEBUG"yaffs_link link count %d i_count %d\n",
1072 old_dentry->d_inode->i_nlink,atomic_read(&old_dentry->d_inode->i_count)));
1076 yaffs_GrossUnlock(dev);
1090 static int yaffs_symlink(struct inode * dir, struct dentry *dentry, const char * symname)
1095 T(YAFFS_TRACE_OS,(KERN_DEBUG"yaffs_symlink\n"));
1097 dev = yaffs_InodeToObject(dir)->myDev;
1098 yaffs_GrossLock(dev);
1099 obj = yaffs_MknodSymLink(yaffs_InodeToObject(dir), dentry->d_name.name,
1100 S_IFLNK | S_IRWXUGO, current->uid, current->gid,
1102 yaffs_GrossUnlock(dev);
1107 struct inode* inode;
1109 inode = yaffs_get_inode(dir->i_sb, obj->yst_mode, 0, obj);
1110 d_instantiate(dentry, inode);
1111 T(YAFFS_TRACE_OS,(KERN_DEBUG"symlink created OK\n"));
1116 T(YAFFS_TRACE_OS,(KERN_DEBUG"symlink not created\n"));
1123 static int yaffs_sync_object(struct file * file, struct dentry *dentry, int datasync)
1129 obj = yaffs_DentryToObject(dentry);
1133 T(YAFFS_TRACE_OS,(KERN_DEBUG"yaffs_sync_object\n"));
1134 yaffs_GrossLock(dev);
1135 yaffs_FlushFile(obj,1);
1136 yaffs_GrossUnlock(dev);
1141 * The VFS layer already does all the dentry stuff for rename.
1143 * NB: POSIX says you can rename an object over an old object of the same name
1145 static int yaffs_rename(struct inode * old_dir, struct dentry *old_dentry, struct inode * new_dir,struct dentry *new_dentry)
1148 int retVal = YAFFS_FAIL;
1150 yaffs_Object *target;
1152 dev = yaffs_InodeToObject(old_dir)->myDev;
1154 yaffs_GrossLock(dev);
1156 // Check if the target is an existing directory that is not empty.
1157 target = yaffs_FindObjectByName(yaffs_InodeToObject(new_dir),new_dentry->d_name.name);
1160 target->variantType == YAFFS_OBJECT_TYPE_DIRECTORY &&
1161 !list_empty(&target->variant.directoryVariant.children))
1163 retVal = YAFFS_FAIL;
1168 // Unlink the target if it exists
1169 removed = yaffs_Unlink(yaffs_InodeToObject(new_dir),new_dentry->d_name.name);
1172 retVal = yaffs_RenameObject(yaffs_InodeToObject(old_dir),old_dentry->d_name.name,
1173 yaffs_InodeToObject(new_dir),new_dentry->d_name.name);
1176 yaffs_GrossUnlock(dev);
1178 if(retVal == YAFFS_OK)
1180 if(removed == YAFFS_OK)
1182 new_dentry->d_inode->i_nlink--;
1183 mark_inode_dirty(new_dentry->d_inode);
1196 static int yaffs_setattr(struct dentry *dentry, struct iattr *attr)
1198 struct inode *inode = dentry->d_inode;
1202 T(YAFFS_TRACE_OS,(KERN_DEBUG"yaffs_setattr of object %d\n",yaffs_InodeToObject(inode)->objectId));
1204 if((error = inode_change_ok(inode,attr)) == 0)
1207 dev = yaffs_InodeToObject(inode)->myDev;
1208 yaffs_GrossLock(dev);
1209 if(yaffs_SetAttributes(yaffs_InodeToObject(inode),attr) == YAFFS_OK)
1217 yaffs_GrossUnlock(dev);
1219 error = inode_setattr(inode,attr);
1224 //#if defined(CONFIG_KERNEL_2_5) /* Added NCB 185-8-2003 */
1225 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2,5,0))
1226 static int yaffs_statfs(struct super_block *sb, struct kstatfs *buf)
1228 static int yaffs_statfs(struct super_block *sb, struct statfs *buf)
1233 yaffs_Device *dev = yaffs_SuperToDevice(sb);
1234 T(YAFFS_TRACE_OS,(KERN_DEBUG"yaffs_statfs\n"));
1236 yaffs_GrossLock(dev);
1239 buf->f_type = YAFFS_MAGIC;
1240 buf->f_bsize = sb->s_blocksize;
1241 buf->f_namelen = 255;
1242 if(sb->s_blocksize > dev->nBytesPerChunk)
1245 buf->f_blocks = (dev->endBlock - dev->startBlock + 1) * dev->nChunksPerBlock/
1246 (sb->s_blocksize/dev->nBytesPerChunk);
1247 buf->f_bfree = yaffs_GetNumberOfFreeChunks(dev)/
1248 (sb->s_blocksize/dev->nBytesPerChunk);
1253 buf->f_blocks = (dev->endBlock - dev->startBlock + 1) * dev->nChunksPerBlock *
1254 (dev->nBytesPerChunk/sb->s_blocksize);
1255 buf->f_bfree = yaffs_GetNumberOfFreeChunks(dev) *
1256 (dev->nBytesPerChunk/sb->s_blocksize);
1260 buf->f_bavail = buf->f_bfree;
1262 yaffs_GrossUnlock(dev);
1266 static void yaffs_read_inode (struct inode *inode)
1268 // NB This is called as a side effect of other functions and
1269 // thus gross locking should always be in place already.
1272 yaffs_Device *dev = yaffs_SuperToDevice(inode->i_sb);
1274 T(YAFFS_TRACE_OS,(KERN_DEBUG"yaffs_read_inode for %d\n",(int)inode->i_ino));
1276 obj = yaffs_FindObjectByNumber(dev,inode->i_ino);
1278 yaffs_FillInodeFromObject(inode,obj);
1282 static LIST_HEAD(yaffs_dev_list);
1284 static void yaffs_put_super(struct super_block *sb)
1286 yaffs_Device *dev = yaffs_SuperToDevice(sb);
1288 yaffs_GrossLock(dev);
1289 if(dev->putSuperFunc)
1291 dev->putSuperFunc(sb);
1293 yaffs_Deinitialise(dev);
1294 yaffs_GrossUnlock(dev);
1296 /* we assume this is protected by lock_kernel() in mount/umount */
1297 list_del(&dev->devList);
1303 #ifdef CONFIG_YAFFS_MTD_ENABLED
1305 static void yaffs_MTDPutSuper(struct super_block *sb)
1308 struct mtd_info *mtd = yaffs_SuperToDevice(sb)->genericDevice;
1315 put_mtd_device(mtd);
1321 static struct super_block *yaffs_internal_read_super(int yaffsVersion,int useRam, struct super_block * sb, void * data, int silent)
1324 struct inode * inode = NULL;
1325 struct dentry * root;
1326 yaffs_Device *dev = 0;
1329 sb->s_magic = YAFFS_MAGIC;
1330 sb->s_op = &yaffs_super_ops;
1333 printk(KERN_INFO"yaffs: sb is NULL\n");
1335 printk(KERN_INFO"yaffs: sb->s_dev is NULL\n");
1336 else if(! kdevname(sb->s_dev))
1337 printk(KERN_INFO"yaffs: kdevname is NULL\n");
1339 printk(KERN_INFO"yaffs: dev is %d name is \"%s\"\n", sb->s_dev, kdevname(sb->s_dev));
1343 #ifdef CONFIG_YAFFS_USE_CHUNK_SIZE
1344 sb->s_blocksize = YAFFS_BYTES_PER_CHUNK;
1345 sb->s_blocksize_bits = YAFFS_CHUNK_SIZE_SHIFT;
1347 sb->s_blocksize = PAGE_CACHE_SIZE;
1348 sb->s_blocksize_bits = PAGE_CACHE_SHIFT;
1350 T(YAFFS_TRACE_OS,("yaffs_read_super: Using yaffs%d\n",yaffsVersion));
1351 T(YAFFS_TRACE_OS,("yaffs_read_super: %s block size %d\n", useRam ? "RAM" : "MTD",(int)(sb->s_blocksize)));
1353 #ifdef CONFIG_YAFFS_DISABLE_WRITE_VERIFY
1354 T(YAFFS_TRACE_OS,("yaffs: Write verification disabled. All guarantees null and void\n"));
1362 #ifdef CONFIG_YAFFS_RAM_ENABLED
1363 // Set the yaffs_Device up for ram emulation
1366 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2,5,0))
1367 sb->s_fs_info = dev = kmalloc(sizeof(yaffs_Device),GFP_KERNEL);
1369 sb->u.generic_sbp = dev = kmalloc(sizeof(yaffs_Device),GFP_KERNEL);
1374 // Deep shit could not allocate device structure
1375 T(YAFFS_TRACE_OS,("yaffs_read_super: Failed trying to allocate yaffs_Device.\n"));
1379 memset(dev,0,sizeof(yaffs_Device));
1380 dev->genericDevice = NULL; // Not used for RAM emulation.
1381 dev->name = sb->s_type->name;
1383 nBlocks = YAFFS_RAM_EMULATION_SIZE / (YAFFS_CHUNKS_PER_BLOCK * YAFFS_BYTES_PER_CHUNK);
1384 dev->startBlock = 0;
1385 dev->endBlock = nBlocks - 1;
1386 dev->nChunksPerBlock = YAFFS_CHUNKS_PER_BLOCK;
1387 dev->nBytesPerChunk = YAFFS_BYTES_PER_CHUNK;
1388 dev->nReservedBlocks = 5;
1390 if(yaffsVersion == 2)
1392 dev->writeChunkWithTagsToNAND = nandemul2k_WriteChunkWithTagsToNAND;
1393 dev->readChunkWithTagsFromNAND = nandemul2k_ReadChunkWithTagsFromNAND;
1394 dev->markNANDBlockBad = nandemul2k_MarkNANDBlockBad;
1395 dev->queryNANDBlock = nandemul2k_QueryNANDBlock;
1396 dev->eraseBlockInNAND = nandemul2k_EraseBlockInNAND;
1397 dev->initialiseNAND = nandemul2k_InitialiseNAND;
1399 dev->nChunksPerBlock = nandemul2k_GetChunksPerBlock();
1400 dev->nBytesPerChunk = nandemul2k_GetBytesPerChunk();;
1401 nBlocks = nandemul2k_GetNumberOfBlocks();
1402 dev->startBlock = 0;
1403 dev->endBlock = nBlocks - 1;
1407 dev->writeChunkToNAND = nandemul_WriteChunkToNAND;
1408 dev->readChunkFromNAND = nandemul_ReadChunkFromNAND;
1409 dev->eraseBlockInNAND = nandemul_EraseBlockInNAND;
1410 dev->initialiseNAND = nandemul_InitialiseNAND;
1418 #ifdef CONFIG_YAFFS_MTD_ENABLED
1419 struct mtd_info *mtd;
1421 T(YAFFS_TRACE_ALWAYS,("yaffs: Attempting MTD mount on %u.%u, \"%s\"\n",
1422 MAJOR(sb->s_dev),MINOR(sb->s_dev),kdevname(sb->s_dev)));
1424 // Check it's an mtd device.....
1425 if(MAJOR(sb->s_dev) != MTD_BLOCK_MAJOR)
1427 return NULL; // This isn't an mtd device
1431 mtd = get_mtd_device(NULL, MINOR(sb->s_dev));
1434 T(YAFFS_TRACE_ALWAYS,("yaffs: MTD device #%u doesn't appear to exist\n", MINOR(sb->s_dev)));
1439 if(mtd->type != MTD_NANDFLASH)
1441 T(YAFFS_TRACE_ALWAYS,("yaffs: MTD device is not NAND it's type %d\n", mtd->type));
1445 T(YAFFS_TRACE_OS,(" erase %p\n",mtd->erase));
1446 T(YAFFS_TRACE_OS,(" read %p\n",mtd->read));
1447 T(YAFFS_TRACE_OS,(" write %p\n",mtd->write));
1448 T(YAFFS_TRACE_OS,(" readoob %p\n",mtd->read_oob));
1449 T(YAFFS_TRACE_OS,(" writeoob %p\n",mtd->write_oob));
1450 T(YAFFS_TRACE_OS,(" block_isbad %p\n",mtd->block_isbad));
1451 T(YAFFS_TRACE_OS,(" block_markbad %p\n",mtd->block_markbad));
1452 T(YAFFS_TRACE_OS,(" oobblock %d\n",mtd->oobblock));
1453 T(YAFFS_TRACE_OS,(" oobsize %d\n",mtd->oobsize));
1454 T(YAFFS_TRACE_OS,(" erasesize %d\n",mtd->erasesize));
1455 T(YAFFS_TRACE_OS,(" size %d\n",mtd->size));
1457 if(yaffsVersion == 2)
1459 // Check for version 2 style functions
1461 !mtd->block_isbad ||
1462 !mtd->block_markbad ||
1465 #ifndef CONFIG_YAFFS_USE_OLD_MTD
1472 T(YAFFS_TRACE_ALWAYS,("yaffs: MTD device does not support required functions\n"));;
1476 if(mtd->oobblock < YAFFS_MIN_YAFFS2_CHUNK_SIZE ||
1477 mtd->oobsize < YAFFS_MIN_YAFFS2_SPARE_SIZE)
1479 T(YAFFS_TRACE_ALWAYS,("yaffs: MTD device does not support have the right page sizes\n"));
1484 // Check for V1 style functions
1488 #ifndef CONFIG_YAFFS_USE_OLD_MTD
1495 T(YAFFS_TRACE_ALWAYS,("yaffs: MTD device does not support required functions\n"));;
1499 if(mtd->oobblock != YAFFS_BYTES_PER_CHUNK ||
1500 mtd->oobsize != YAFFS_BYTES_PER_SPARE)
1502 T(YAFFS_TRACE_ALWAYS,("yaffs: MTD device does not support have the right page sizes\n"));
1508 // OK, so if we got here, we have an MTD that's NAND and looks
1509 // like it has the right capabilities
1510 // Set the yaffs_Device up for mtd
1512 //#if defined(CONFIG_KERNEL_2_5)
1513 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2,5,0))
1514 sb->s_fs_info = dev = kmalloc(sizeof(yaffs_Device),GFP_KERNEL);
1516 sb->u.generic_sbp = dev = kmalloc(sizeof(yaffs_Device),GFP_KERNEL);
1520 // Deep shit could not allocate device structure
1521 T(YAFFS_TRACE_ALWAYS,("yaffs_read_super: Failed trying to allocate yaffs_Device. \n"));
1525 memset(dev,0,sizeof(yaffs_Device));
1526 dev->genericDevice = mtd;
1527 dev->name = mtd->name;
1529 // Set up the memory size parameters....
1531 nBlocks = mtd->size / (YAFFS_CHUNKS_PER_BLOCK * YAFFS_BYTES_PER_CHUNK);
1532 dev->startBlock = 0;
1533 dev->endBlock = nBlocks - 1;
1534 dev->nChunksPerBlock = YAFFS_CHUNKS_PER_BLOCK;
1535 dev->nBytesPerChunk = YAFFS_BYTES_PER_CHUNK;
1536 dev->nReservedBlocks = 5;
1537 dev->nShortOpCaches = 10; // Enable short op caching
1540 // ... and the functions.
1541 if(yaffsVersion == 2)
1543 dev->writeChunkWithTagsToNAND = nandmtd2_WriteChunkWithTagsToNAND;
1544 dev->readChunkWithTagsFromNAND = nandmtd2_ReadChunkWithTagsFromNAND;
1545 dev->markNANDBlockBad = nandmtd2_MarkNANDBlockBad;
1546 dev->queryNANDBlock = nandmtd2_QueryNANDBlock;
1547 dev->spareBuffer = YMALLOC(mtd->oobsize);
1549 dev->nBytesPerChunk = mtd->oobblock;
1550 dev->nChunksPerBlock = mtd->erasesize / mtd->oobblock;
1551 nBlocks = mtd->size / mtd->erasesize;
1552 dev->startBlock = 0;
1553 dev->endBlock = nBlocks - 1;
1557 dev->writeChunkToNAND = nandmtd_WriteChunkToNAND;
1558 dev->readChunkFromNAND = nandmtd_ReadChunkFromNAND;
1561 // ... and common functions
1562 dev->eraseBlockInNAND = nandmtd_EraseBlockInNAND;
1563 dev->initialiseNAND = nandmtd_InitialiseNAND;
1565 dev->putSuperFunc = yaffs_MTDPutSuper;
1567 #ifdef CONFIG_YAFFS_USE_NANDECC
1568 dev->useNANDECC = 1;
1573 /* we assume this is protected by lock_kernel() in mount/umount */
1574 list_add_tail(&dev->devList, &yaffs_dev_list);
1576 init_MUTEX(&dev->grossLock);
1579 yaffs_GrossLock(dev);
1581 err = yaffs_GutsInitialise(dev);
1583 T(YAFFS_TRACE_OS,("yaffs_read_super: guts initialised %s\n", (err == YAFFS_OK) ? "OK" : "FAILED"));
1585 // Create root inode
1587 inode = yaffs_get_inode(sb, S_IFDIR | 0755, 0,yaffs_Root(dev));
1589 yaffs_GrossUnlock(dev);
1595 inode->i_op = & yaffs_dir_inode_operations;
1596 inode->i_fop = & yaffs_dir_operations;
1598 T(YAFFS_TRACE_OS,("yaffs_read_super: got root inode\n"));
1601 root = d_alloc_root(inode);
1603 T(YAFFS_TRACE_OS,("yaffs_read_super: d_alloc_root done\n"));
1611 T(YAFFS_TRACE_OS,("yaffs_read_super: done\n"));
1616 static int yaffs_internal_read_super_ram(struct super_block * sb, void * data, int silent)
1618 return yaffs_internal_read_super(1,1,sb,data,silent) ? 0 : -1;
1620 static int yaffs_internal_read_super_mtd(struct super_block * sb, void * data, int silent)
1622 return yaffs_internal_read_super(1,0,sb,data,silent) ? 0 : -1;
1625 static int yaffs2_internal_read_super_ram(struct super_block * sb, void * data, int silent)
1627 return yaffs_internal_read_super(2,1,sb,data,silent) ? 0 : -1;
1629 static int yaffs2_internal_read_super_mtd(struct super_block * sb, void * data, int silent)
1631 return yaffs_internal_read_super(2,0,sb,data,silent) ? 0 : -1;
1636 #ifdef CONFIG_YAFFS_MTD_ENABLED
1637 //#if defined(CONFIG_KERNEL_2_5)
1638 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2,5,0))
1639 static struct super_block *yaffs_read_super(struct file_system_type * fs, int flags, const char *dev_name, void *data)
1642 return get_sb_bdev(fs, flags, dev_name, data, yaffs_internal_read_super_mtd);
1645 /* changes NCB 2.5.70 */
1646 //static DECLARE_FSTYPE(yaffs_fs_type, "yaffs", yaffs_read_super, FS_REQUIRES_DEV);
1647 static struct file_system_type yaffs_fs_type = {
1648 .owner = THIS_MODULE,
1650 .get_sb = yaffs_read_super,
1651 .kill_sb = kill_block_super,
1652 // .kill_sb = kill_litter_super,
1653 .fs_flags = FS_REQUIRES_DEV,
1656 static struct super_block *yaffs_read_super(struct super_block * sb, void * data, int silent)
1658 return yaffs_internal_read_super(1,0,sb,data,silent);
1661 static DECLARE_FSTYPE(yaffs_fs_type, "yaffs", yaffs_read_super, FS_REQUIRES_DEV);
1664 #endif // CONFIG_YAFFS_MTD_ENABLED
1666 #ifdef CONFIG_YAFFS2_MTD_ENABLED
1668 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2,5,0))
1669 static struct super_block *yaffs2_read_super(struct file_system_type * fs, int flags, const char *dev_name, void *data)
1672 return get_sb_bdev(fs, flags, dev_name, data, yaffs2_internal_read_super_mtd);
1675 /* changes NCB 2.5.70 */
1676 //static DECLARE_FSTYPE(yaffs_fs_type, "yaffs", yaffs_read_super, FS_REQUIRES_DEV);
1677 static struct file_system_type yaffs2_fs_type = {
1678 .owner = THIS_MODULE,
1680 .get_sb = yaffs2_read_super,
1681 .kill_sb = kill_block_super,
1682 // .kill_sb = kill_litter_super,
1683 .fs_flags = FS_REQUIRES_DEV,
1686 static struct super_block *yaffs2_read_super(struct super_block * sb, void * data, int silent)
1688 return yaffs_internal_read_super(2,0,sb,data,silent);
1691 static DECLARE_FSTYPE(yaffs2_fs_type, "yaffs2", yaffs2_read_super, FS_REQUIRES_DEV);
1694 #endif // CONFIG_YAFFS2_MTD_ENABLED
1697 #ifdef CONFIG_YAFFS_RAM_ENABLED
1699 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2,5,0))
1700 static struct super_block *yaffs_ram_read_super(struct file_system_type * fs, int flags, const char *dev_name, void *data)
1703 return get_sb_nodev(fs, flags, data, yaffs_internal_read_super_ram);
1707 static struct file_system_type yaffs_ram_fs_type = {
1708 .owner = THIS_MODULE,
1710 .get_sb = yaffs_ram_read_super,
1711 .kill_sb = kill_litter_super,
1715 static struct super_block *yaffs_ram_read_super(struct super_block * sb, void * data, int silent)
1717 return yaffs_internal_read_super(1,1,sb,data,silent);
1720 static DECLARE_FSTYPE(yaffs_ram_fs_type, "yaffsram", yaffs_ram_read_super, FS_SINGLE);
1723 #endif // CONFIG_YAFFS_RAM_ENABLED
1725 #ifdef CONFIG_YAFFS2_RAM_ENABLED
1727 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2,5,0))
1728 static struct super_block *yaffs2_ram_read_super(struct file_system_type * fs, int flags, const char *dev_name, void *data)
1731 return get_sb_nodev(fs, flags, data, yaffs2_internal_read_super_ram);
1735 static struct file_system_type yaffs2_ram_fs_type = {
1736 .owner = THIS_MODULE,
1737 .name = "yaffs2ram",
1738 .get_sb = yaffs2_ram_read_super,
1739 .kill_sb = kill_litter_super,
1743 static struct super_block *yaffs2_ram_read_super(struct super_block * sb, void * data, int silent)
1745 return yaffs_internal_read_super(2,1,sb,data,silent);
1748 static DECLARE_FSTYPE(yaffs2_ram_fs_type, "yaffs2ram", yaffs2_ram_read_super, FS_SINGLE);
1751 #endif // CONFIG_YAFFS2_RAM_ENABLED
1755 static struct proc_dir_entry *my_proc_entry;
1756 static struct proc_dir_entry *my_proc_ram_write_entry;
1758 static char * yaffs_dump_dev(char *buf,yaffs_Device *dev)
1760 buf +=sprintf(buf,"startBlock......... %d\n",dev->startBlock);
1761 buf +=sprintf(buf,"endBlock........... %d\n",dev->endBlock);
1762 buf +=sprintf(buf,"chunkGroupBits..... %d\n",dev->chunkGroupBits);
1763 buf +=sprintf(buf,"chunkGroupSize..... %d\n",dev->chunkGroupSize);
1764 buf +=sprintf(buf,"nErasedBlocks...... %d\n",dev->nErasedBlocks);
1765 buf +=sprintf(buf,"nTnodesCreated..... %d\n",dev->nTnodesCreated);
1766 buf +=sprintf(buf,"nFreeTnodes........ %d\n",dev->nFreeTnodes);
1767 buf +=sprintf(buf,"nObjectsCreated.... %d\n",dev->nObjectsCreated);
1768 buf +=sprintf(buf,"nFreeObjects....... %d\n",dev->nFreeObjects);
1769 buf +=sprintf(buf,"nFreeChunks........ %d\n",dev->nFreeChunks);
1770 buf +=sprintf(buf,"nPageWrites........ %d\n",dev->nPageWrites);
1771 buf +=sprintf(buf,"nPageReads......... %d\n",dev->nPageReads);
1772 buf +=sprintf(buf,"nBlockErasures..... %d\n",dev->nBlockErasures);
1773 buf +=sprintf(buf,"nGCCopies.......... %d\n",dev->nGCCopies);
1774 buf +=sprintf(buf,"garbageCollections. %d\n",dev->garbageCollections);
1775 buf +=sprintf(buf,"passiveGCs......... %d\n",dev->passiveGarbageCollections);
1776 buf +=sprintf(buf,"nRetriedWrites..... %d\n",dev->nRetriedWrites);
1777 buf +=sprintf(buf,"nRetireBlocks...... %d\n",dev->nRetiredBlocks);
1778 buf +=sprintf(buf,"eccFixed........... %d\n",dev->eccFixed);
1779 buf +=sprintf(buf,"eccUnfixed......... %d\n",dev->eccUnfixed);
1780 buf +=sprintf(buf,"tagsEccFixed....... %d\n",dev->tagsEccFixed);
1781 buf +=sprintf(buf,"tagsEccUnfixed..... %d\n",dev->tagsEccUnfixed);
1782 buf +=sprintf(buf,"cacheHits.......... %d\n",dev->cacheHits);
1783 buf +=sprintf(buf,"nDeletedFiles...... %d\n",dev->nDeletedFiles);
1784 buf +=sprintf(buf,"nUnlinkedFiles..... %d\n",dev->nUnlinkedFiles);
1785 buf +=sprintf(buf,"nBackgroudDeletions %d\n",dev->nBackgroundDeletions);
1786 buf +=sprintf(buf,"useNANDECC......... %d\n",dev->useNANDECC);
1787 buf +=sprintf(buf,"isYaffs2........... %d\n",dev->isYaffs2);
1792 static int yaffs_proc_read(
1801 struct list_head *item;
1806 /* Get proc_file_read() to step 'offset' by one on each sucessive call.
1807 * We use 'offset' (*ppos) to indicate where we are in devList.
1808 * This also assumes the user has posted a read buffer large
1809 * enough to hold the complete output; but that's life in /proc.
1814 /* Print header first */
1816 buf += sprintf(buf, "YAFFS built:" __DATE__ " "__TIME__
1817 "\n%s\n%s\n", yaffs_fs_c_version, yaffs_guts_c_version);
1820 /* hold lock_kernel while traversing yaffs_dev_list */
1823 /* Locate and print the Nth entry. Order N-squared but N is small. */
1824 list_for_each(item, &yaffs_dev_list) {
1825 yaffs_Device *dev = list_entry(item, yaffs_Device, devList);
1830 buf += sprintf(buf,"\nDevice %d \"%s\"\n", n, dev->name);
1831 buf = yaffs_dump_dev(buf, dev);
1836 return buf-page < count ? buf-page : count;
1839 static int yaffs_proc_ram_write(
1849 printk(KERN_DEBUG "yaffs write size %d\n",count);
1855 // Stuff to handle installation of file systems
1856 struct file_system_to_install
1858 struct file_system_type *fst;
1862 static struct file_system_to_install fs_to_install[] =
1864 #ifdef CONFIG_YAFFS_RAM_ENABLED
1865 { &yaffs_ram_fs_type, 0},
1867 #ifdef CONFIG_YAFFS2_RAM_ENABLED
1868 { &yaffs2_ram_fs_type,0},
1870 #ifdef CONFIG_YAFFS_MTD_ENABLED
1871 { &yaffs_fs_type,0},
1873 #ifdef CONFIG_YAFFS2_MTD_ENABLED
1874 { &yaffs2_fs_type,0},
1879 static int __init init_yaffs_fs(void)
1882 struct file_system_to_install *fsinst;
1884 T(YAFFS_TRACE_ALWAYS,("yaffs " __DATE__ " " __TIME__ " Installing. \n"));
1888 /* Install the proc_fs entry */
1889 my_proc_entry = create_proc_read_entry("yaffs",
1901 // Now add the file system entries
1903 fsinst = fs_to_install;
1905 while(fsinst->fst && !error)
1907 error = register_filesystem(fsinst->fst);
1910 fsinst->installed = 1;
1915 // Any errors? uninstall
1918 fsinst = fs_to_install;
1922 if(fsinst->installed)
1924 unregister_filesystem(fsinst->fst);
1925 fsinst->installed = 0;
1934 static void __exit exit_yaffs_fs(void)
1937 struct file_system_to_install *fsinst;
1939 T(YAFFS_TRACE_ALWAYS,("yaffs " __DATE__ " " __TIME__ " removing. \n"));
1941 remove_proc_entry("yaffs",&proc_root);
1943 fsinst = fs_to_install;
1947 if(fsinst->installed)
1949 unregister_filesystem(fsinst->fst);
1950 fsinst->installed = 0;
1957 module_init(init_yaffs_fs)
1958 module_exit(exit_yaffs_fs)
1960 MODULE_DESCRIPTION("YAFFS2 - a NAND specific flash file system");
1961 MODULE_AUTHOR("Charles Manning, Aleph One Ltd., 2002,2003,2004");
1962 MODULE_LICENSE("GPL");