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 1.12 2005-07-27 20:23:15 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);
182 static struct address_space_operations yaffs_file_address_operations = {
183 .readpage = yaffs_readpage,
184 .writepage = yaffs_writepage,
185 .prepare_write = yaffs_prepare_write,
186 .commit_write = yaffs_commit_write,
189 static struct file_operations yaffs_file_operations = {
190 .read = generic_file_read,
191 .write = generic_file_write,
192 .mmap = generic_file_mmap,
193 .flush = yaffs_file_flush,
194 .fsync = yaffs_sync_object,
197 static struct inode_operations yaffs_file_inode_operations = {
198 .setattr = yaffs_setattr,
201 struct inode_operations yaffs_symlink_inode_operations = {
202 .readlink = yaffs_readlink,
203 .follow_link = yaffs_follow_link,
204 .setattr = yaffs_setattr,
207 static struct inode_operations yaffs_dir_inode_operations = {
208 .create = yaffs_create,
209 .lookup = yaffs_lookup,
211 .unlink = yaffs_unlink,
212 .symlink = yaffs_symlink,
213 .mkdir = yaffs_mkdir,
214 .rmdir = yaffs_unlink,
215 .mknod = yaffs_mknod,
216 .rename = yaffs_rename,
217 .setattr = yaffs_setattr,
220 static struct file_operations yaffs_dir_operations = {
221 .read = generic_read_dir,
222 .readdir = yaffs_readdir,
223 .fsync = yaffs_sync_object,
226 static struct super_operations yaffs_super_ops = {
227 .statfs = yaffs_statfs,
228 .read_inode = yaffs_read_inode,
229 .put_inode = yaffs_put_inode,
230 .put_super = yaffs_put_super,
231 .delete_inode = yaffs_delete_inode,
232 .clear_inode = yaffs_clear_inode,
237 static void yaffs_GrossLock(yaffs_Device *dev)
239 T(YAFFS_TRACE_OS,(KERN_DEBUG"yaffs locking\n"));
241 down(&dev->grossLock);
244 static void yaffs_GrossUnlock(yaffs_Device *dev)
246 T(YAFFS_TRACE_OS,(KERN_DEBUG"yaffs unlocking\n"));
251 static int yaffs_readlink(struct dentry *dentry, char __user *buffer, int buflen)
253 unsigned char *alias;
256 yaffs_Device *dev = yaffs_DentryToObject(dentry)->myDev;
259 yaffs_GrossLock(dev);
261 alias = yaffs_GetSymlinkAlias(yaffs_DentryToObject(dentry));
263 yaffs_GrossUnlock(dev);
268 ret = vfs_readlink(dentry, buffer, buflen, alias);
273 static int yaffs_follow_link(struct dentry *dentry, struct nameidata *nd)
275 unsigned char *alias;
277 yaffs_Device *dev = yaffs_DentryToObject(dentry)->myDev;
280 yaffs_GrossLock(dev);
282 alias = yaffs_GetSymlinkAlias(yaffs_DentryToObject(dentry));
284 yaffs_GrossUnlock(dev);
289 ret = vfs_follow_link(nd,alias);
295 struct inode *yaffs_get_inode(struct super_block *sb, int mode, int dev,yaffs_Object *obj);
298 * Lookup is used to find objects in the fs
300 //#if defined(CONFIG_KERNEL_2_5) /* Added NCB 185-8-2003 */
301 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2,5,0))
303 static struct dentry * yaffs_lookup(struct inode *dir, struct dentry *dentry, struct nameidata *n)
305 static struct dentry * yaffs_lookup(struct inode *dir, struct dentry *dentry)
309 struct inode *inode = NULL; // NCB 2.5/2.6 needs NULL here
311 yaffs_Device *dev = yaffs_InodeToObject(dir)->myDev;
314 yaffs_GrossLock(dev);
317 T(YAFFS_TRACE_OS,(KERN_DEBUG"yaffs_lookup for %d:%s\n",yaffs_InodeToObject(dir)->objectId,dentry->d_name.name));
319 obj = yaffs_FindObjectByName(yaffs_InodeToObject(dir),dentry->d_name.name);
321 obj = yaffs_GetEquivalentObject(obj); // in case it was a hardlink
327 T(YAFFS_TRACE_OS,(KERN_DEBUG"yaffs_lookup found %d\n",obj->objectId));
329 inode = yaffs_get_inode(dir->i_sb, obj->yst_mode,0,obj);
333 T(YAFFS_TRACE_OS,(KERN_DEBUG"yaffs_loookup dentry \n"));
334 /* #if 0 asserted by NCB for 2.5/6 compatability - falls through to d_add even if NULL inode */
336 //dget(dentry); // try to solve directory bug
339 yaffs_GrossUnlock(dev);
349 T(YAFFS_TRACE_OS,(KERN_DEBUG"yaffs_lookup not found\n"));
352 yaffs_GrossUnlock(dev);
354 /* added NCB for 2.5/6 compatability - forces add even if inode is NULL which creates dentry hash*/
358 // return (ERR_PTR(-EIO));
362 // For now put inode is just for debugging
363 // Put inode is called when the inode **structure** is put.
364 static void yaffs_put_inode(struct inode *inode)
366 T(YAFFS_TRACE_OS,("yaffs_put_inode: ino %d, count %d\n",(int)inode->i_ino, atomic_read(&inode->i_count)));
370 // clear is called to tell the fs to release any per-inode data it holds
371 static void yaffs_clear_inode(struct inode *inode)
376 obj = yaffs_InodeToObject(inode);
378 T(YAFFS_TRACE_OS,("yaffs_clear_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);
386 // Clear the association between the inode ant the yaffs_Object.
388 inode->u.generic_ip = NULL;
390 // If the object freeing was deferred, then the real free happens now.
391 // This should fix the inode inconsistency problem.
393 yaffs_HandleDeferedFree(obj);
395 yaffs_GrossUnlock(dev);
401 // delete is called when the link count is zero and the inode
402 // is put (ie. nobody wants to know about it anymore, time to
404 // NB Must call clear_inode()
405 static void yaffs_delete_inode(struct inode *inode)
407 yaffs_Object *obj = yaffs_InodeToObject(inode);
410 T(YAFFS_TRACE_OS,("yaffs_delete_inode: ino %d, count %d %s\n",(int)inode->i_ino, atomic_read(&inode->i_count),
411 obj ? "object exists" : "null object"));
416 yaffs_GrossLock(dev);
417 yaffs_DeleteFile(obj);
418 yaffs_GrossUnlock(dev);
424 static int yaffs_file_flush(struct file* file)
426 yaffs_Object *obj = yaffs_DentryToObject(file->f_dentry);
428 yaffs_Device *dev = obj->myDev;
430 T(YAFFS_TRACE_OS,(KERN_DEBUG"yaffs_file_flush object %d (%s)\n",obj->objectId,
431 obj->dirty ? "dirty" : "clean"));
433 yaffs_GrossLock(dev);
435 yaffs_FlushFile(obj,1);
437 yaffs_GrossUnlock(dev);
444 static int yaffs_readpage_nolock(struct file *f, struct page * pg)
449 unsigned char *pg_buf;
454 T(YAFFS_TRACE_OS,(KERN_DEBUG"yaffs_readpage at %08x, size %08x\n",
455 (unsigned)(pg->index << PAGE_CACHE_SHIFT), (unsigned)PAGE_CACHE_SIZE));
457 obj = yaffs_DentryToObject(f->f_dentry);
462 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2,5,0))
463 BUG_ON(!PageLocked(pg));
470 /* FIXME: Can kmap fail? */
472 yaffs_GrossLock(dev);
474 ret = yaffs_ReadDataFromFile(obj, pg_buf, pg->index << PAGE_CACHE_SHIFT, PAGE_CACHE_SIZE);
476 yaffs_GrossUnlock(dev);
478 if(ret >= 0) ret = 0;
481 ClearPageUptodate(pg);
488 flush_dcache_page(pg);
492 T(YAFFS_TRACE_OS,(KERN_DEBUG"yaffs_readpage done\n"));
496 static int yaffs_readpage_unlock(struct file *f, struct page *pg)
498 int ret = yaffs_readpage_nolock(f,pg);
503 static int yaffs_readpage(struct file *f, struct page * pg)
505 return yaffs_readpage_unlock(f,pg);
508 // writepage inspired by/stolen from smbfs
511 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2,5,0))
512 static int yaffs_writepage(struct page *page, struct writeback_control *wbc)
514 static int yaffs_writepage(struct page *page)
517 struct address_space *mapping = page->mapping;
519 unsigned long end_index;
527 inode = mapping->host;
531 end_index = inode->i_size >> PAGE_CACHE_SHIFT;
534 if (page->index < end_index)
536 nBytes = PAGE_CACHE_SIZE;
540 nBytes = inode->i_size & (PAGE_CACHE_SIZE-1);
542 // What's happening here?
543 ///* OK, are we completely out? */
544 //if (page->index >= end_index+1 || !offset)
552 obj = yaffs_InodeToObject(inode);
553 yaffs_GrossLock(obj->myDev);
556 nWritten = yaffs_WriteDataToFile(obj,buffer,page->index << PAGE_CACHE_SHIFT,nBytes,0);
558 yaffs_GrossUnlock(obj->myDev);
561 SetPageUptodate(page);
565 return (nWritten == nBytes) ? 0 : -ENOSPC;
570 static int yaffs_prepare_write(struct file *f, struct page *pg, unsigned offset, unsigned to)
573 T(YAFFS_TRACE_OS,(KERN_DEBUG"yaffs_prepair_write\n"));
574 if(!Page_Uptodate(pg) && (offset || to < PAGE_CACHE_SIZE))
575 return yaffs_readpage_nolock(f,pg);
581 static int yaffs_commit_write(struct file *f, struct page *pg, unsigned offset, unsigned to)
584 void *addr = page_address(pg) + offset;
585 loff_t pos = (((loff_t)pg->index) << PAGE_CACHE_SHIFT) + offset;
586 int nBytes = to - offset;
590 unsigned saddr = (unsigned)addr;
592 T(YAFFS_TRACE_OS,(KERN_DEBUG"yaffs_commit_write addr %x pos %x nBytes %d\n",saddr,spos,nBytes));
594 nWritten = yaffs_file_write(f,addr, nBytes, &pos);
596 if(nWritten != nBytes)
598 T(YAFFS_TRACE_OS,(KERN_DEBUG"yaffs_commit_write not same size nWritten %d nBytes %d\n",nWritten,nBytes));
600 ClearPageUptodate(pg);
607 T(YAFFS_TRACE_OS,(KERN_DEBUG"yaffs_commit_write returning %d\n",nWritten));
615 static void yaffs_FillInodeFromObject(struct inode *inode, yaffs_Object *obj)
619 inode->i_ino = obj->objectId;
620 inode->i_mode = obj->yst_mode;
621 inode->i_uid = obj->yst_uid;
622 inode->i_gid = obj->yst_gid;
623 inode->i_blksize = inode->i_sb->s_blocksize;
624 //#if defined(CONFIG_KERNEL_2_5)
625 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2,5,0))
627 inode->i_rdev = old_decode_dev(obj->yst_rdev);
628 inode->i_atime.tv_sec = (time_t)(obj->yst_atime);
629 inode->i_atime.tv_nsec = 0;
630 inode->i_mtime.tv_sec = (time_t)obj->yst_mtime;
631 inode->i_mtime.tv_nsec =0;
632 inode->i_ctime.tv_sec = (time_t)obj->yst_ctime;
633 inode->i_ctime.tv_nsec = 0;
635 inode->i_rdev = obj->yst_rdev;
636 inode->i_atime = obj->yst_atime;
637 inode->i_mtime = obj->yst_mtime;
638 inode->i_ctime = obj->yst_ctime;
640 inode->i_size = yaffs_GetObjectFileLength(obj);
641 inode->i_blocks = (inode->i_size + 511) >> 9;
643 inode->i_nlink = yaffs_GetObjectLinkCount(obj);
645 T(YAFFS_TRACE_OS,(KERN_DEBUG"yaffs_FillInode mode %x uid %d gid %d size %d count %d\n",
646 inode->i_mode, inode->i_uid, inode->i_gid, (int)inode->i_size, atomic_read(&inode->i_count)));
648 switch (obj->yst_mode & S_IFMT)
650 default: // fifo, device or socket
651 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2,5,0))
652 init_special_inode(inode, obj->yst_mode,old_decode_dev(obj->yst_rdev));
654 init_special_inode(inode, obj->yst_mode,(dev_t)(obj->yst_rdev));
657 case S_IFREG: // file
658 inode->i_op = &yaffs_file_inode_operations;
659 inode->i_fop = &yaffs_file_operations;
660 inode->i_mapping->a_ops = &yaffs_file_address_operations;
662 case S_IFDIR: // directory
663 inode->i_op = &yaffs_dir_inode_operations;
664 inode->i_fop = &yaffs_dir_operations;
666 case S_IFLNK: // symlink
667 inode->i_op = &yaffs_symlink_inode_operations;
672 inode->u.generic_ip = obj;
673 obj->myInode = inode;
678 T(YAFFS_TRACE_OS,(KERN_DEBUG"yaffs_FileInode invalid parameters\n"));
683 struct inode *yaffs_get_inode(struct super_block *sb, int mode, int dev,yaffs_Object *obj)
685 struct inode * inode;
689 T(YAFFS_TRACE_OS,(KERN_DEBUG"yaffs_get_inode for NULL super_block!!\n"));
696 T(YAFFS_TRACE_OS,(KERN_DEBUG"yaffs_get_inode for NULL object!!\n"));
701 T(YAFFS_TRACE_OS,(KERN_DEBUG"yaffs_get_inode for object %d\n",obj->objectId));
703 inode = iget(sb,obj->objectId);
705 // NB Side effect: iget calls back to yaffs_read_inode().
706 // iget also increments the inode's i_count
713 // No longer used because we use generic rw */
714 static ssize_t yaffs_file_read(struct file *f, char *buf, size_t n, loff_t *pos)
721 T(YAFFS_TRACE_OS,(KERN_DEBUG"yaffs_file_read\n"));
723 obj = yaffs_DentryToObject(f->f_dentry);
727 yaffs_GrossLock(dev);
729 inode = f->f_dentry->d_inode;
731 if (*pos < inode->i_size)
733 if (*pos + n > inode->i_size)
735 n = inode->i_size - *pos;
743 nRead = yaffs_ReadDataFromFile(obj,buf,*pos,n);
749 yaffs_GrossUnlock(dev);
753 T(YAFFS_TRACE_OS,(KERN_DEBUG"yaffs_file_read read %d bytes, %d read at %d\n",n,nRead,ipos));
760 static ssize_t yaffs_file_write(struct file *f, const char *buf, size_t n, loff_t *pos)
768 obj = yaffs_DentryToObject(f->f_dentry);
772 yaffs_GrossLock(dev);
774 inode = f->f_dentry->d_inode;
776 if(!S_ISBLK(inode->i_mode) && f->f_flags & O_APPEND)
778 ipos = inode->i_size;
788 T(YAFFS_TRACE_OS,(KERN_DEBUG"yaffs_file_write: hey obj is null!\n"));
792 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));
795 nWritten = yaffs_WriteDataToFile(obj,buf,ipos,n,0);
797 T(YAFFS_TRACE_OS,(KERN_DEBUG"yaffs_file_write writing %d bytes, %d written at %d\n",n,nWritten,ipos));
802 if(ipos > inode->i_size)
804 inode->i_size = ipos;
805 inode->i_blocks = (ipos + 511)>>9;
807 T(YAFFS_TRACE_OS,(KERN_DEBUG"yaffs_file_write size updated to %d bytes, %d blocks\n",ipos,(int)(inode->i_blocks)));
811 yaffs_GrossUnlock(dev);
813 return nWritten != n ? -ENOSPC : nWritten;
818 static int yaffs_readdir(struct file *f, void *dirent, filldir_t filldir)
822 struct inode *inode = f->f_dentry->d_inode;
823 unsigned long offset, curoffs;
827 char name[YAFFS_MAX_NAME_LENGTH +1];
829 obj = yaffs_DentryToObject(f->f_dentry);
832 yaffs_GrossLock(dev);
836 T(YAFFS_TRACE_OS,("yaffs_readdir: starting at %d\n",(int)offset));
840 T(YAFFS_TRACE_OS,(KERN_DEBUG"yaffs_readdir: entry . ino %d \n",(int)inode->i_ino));
841 if(filldir(dirent,".",1,offset,inode->i_ino,DT_DIR) < 0)
850 T(YAFFS_TRACE_OS,(KERN_DEBUG"yaffs_readdir: entry .. ino %d \n",(int)f->f_dentry->d_parent->d_inode->i_ino));
851 if(filldir(dirent,"..",2,offset,f->f_dentry->d_parent->d_inode->i_ino,DT_DIR) < 0)
861 list_for_each(i,&obj->variant.directoryVariant.children)
864 if(curoffs >= offset)
866 l = list_entry(i, yaffs_Object,siblings);
868 yaffs_GetObjectName(l,name,YAFFS_MAX_NAME_LENGTH+1);
869 T(YAFFS_TRACE_OS,(KERN_DEBUG"yaffs_readdir: %s inode %d\n",name,yaffs_GetObjectInode(l)));
875 yaffs_GetObjectInode(l),
876 yaffs_GetObjectType(l))
890 yaffs_GrossUnlock(dev);
897 * File creation. Allocate an inode, and we're done..
899 //#if defined(CONFIG_KERNEL_2_5)
900 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2,5,0))
901 static int yaffs_mknod(struct inode *dir, struct dentry *dentry, int mode, dev_t rdev)
903 static int yaffs_mknod(struct inode *dir, struct dentry *dentry, int mode, int rdev)
908 yaffs_Object *obj = NULL;
911 yaffs_Object *parent = yaffs_InodeToObject(dir);
917 T(YAFFS_TRACE_OS,(KERN_DEBUG"yaffs_mknod: parent object %d type %d\n",
918 parent->objectId,parent->variantType));
922 T(YAFFS_TRACE_OS,(KERN_DEBUG"yaffs_mknod: could not get parent object\n"));
926 T(YAFFS_TRACE_OS,("yaffs_mknod: making oject for %s, mode %x dev %x\n",
927 dentry->d_name.name, mode,rdev));
931 yaffs_GrossLock(dev);
933 switch (mode & S_IFMT)
936 // Special (socket, fifo, device...)
937 T(YAFFS_TRACE_OS,(KERN_DEBUG"yaffs_mknod: making special\n"));
938 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2,5,0))
939 obj = yaffs_MknodSpecial(parent,dentry->d_name.name,mode,current->uid, current->gid,old_encode_dev(rdev));
941 obj = yaffs_MknodSpecial(parent,dentry->d_name.name,mode,current->uid, current->gid,rdev);
944 case S_IFREG: // file
945 T(YAFFS_TRACE_OS,(KERN_DEBUG"yaffs_mknod: making file\n"));
946 obj = yaffs_MknodFile(parent,dentry->d_name.name,mode,current->uid, current->gid);
948 case S_IFDIR: // directory
949 T(YAFFS_TRACE_OS,(KERN_DEBUG"yaffs_mknod: making directory\n"));
950 obj = yaffs_MknodDirectory(parent,dentry->d_name.name,mode,current->uid, current->gid);
952 case S_IFLNK: // symlink
953 T(YAFFS_TRACE_OS,(KERN_DEBUG"yaffs_mknod: making file\n"));
954 obj = NULL; // Do we ever get here?
960 inode = yaffs_get_inode(dir->i_sb, mode, rdev, obj);
961 d_instantiate(dentry, inode);
962 T(YAFFS_TRACE_OS,(KERN_DEBUG"yaffs_mknod created object %d count = %d\n",obj->objectId,atomic_read(&inode->i_count)));
967 T(YAFFS_TRACE_OS,(KERN_DEBUG"yaffs_mknod failed making object\n"));
971 yaffs_GrossUnlock(dev);
976 static int yaffs_mkdir(struct inode * dir, struct dentry * dentry, int mode)
979 T(YAFFS_TRACE_OS,(KERN_DEBUG"yaffs_mkdir\n"));
980 retVal = yaffs_mknod(dir, dentry, mode | S_IFDIR, 0);
982 // attempt to fix dir bug - didn't work
991 //#if defined(CONFIG_KERNEL_2_5) /* Added NCB 185-8-2003 */
992 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2,5,0))
993 static int yaffs_create(struct inode *dir, struct dentry *dentry, int mode, struct nameidata *n)
995 static int yaffs_create(struct inode *dir, struct dentry *dentry, int mode)
998 T(YAFFS_TRACE_OS,(KERN_DEBUG"yaffs_create\n"));
999 return yaffs_mknod(dir, dentry, mode | S_IFREG, 0);
1003 static int yaffs_unlink(struct inode * dir, struct dentry *dentry)
1010 T(YAFFS_TRACE_OS,(KERN_DEBUG"yaffs_unlink %d:%s\n",(int)(dir->i_ino),dentry->d_name.name));
1012 dev = yaffs_InodeToObject(dir)->myDev;
1014 yaffs_GrossLock(dev);
1017 retVal = yaffs_Unlink(yaffs_InodeToObject(dir),dentry->d_name.name);
1020 yaffs_GrossUnlock(dev);
1022 if( retVal == YAFFS_OK)
1024 dentry->d_inode->i_nlink--;
1025 mark_inode_dirty(dentry->d_inode);
1038 static int yaffs_link(struct dentry *old_dentry, struct inode * dir, struct dentry * dentry)
1040 struct inode *inode = old_dentry->d_inode;
1041 yaffs_Object *obj = NULL;
1042 yaffs_Object *link=NULL;
1045 T(YAFFS_TRACE_OS,(KERN_DEBUG"yaffs_link\n"));
1047 obj = yaffs_InodeToObject(inode);
1050 yaffs_GrossLock(dev);
1052 if (!S_ISDIR(inode->i_mode)) // Don't link directories
1054 link = yaffs_Link(yaffs_InodeToObject(dir),dentry->d_name.name,obj);
1060 old_dentry->d_inode->i_nlink = yaffs_GetObjectLinkCount(obj);
1061 d_instantiate(dentry, old_dentry->d_inode);
1062 atomic_inc(&old_dentry->d_inode->i_count);
1063 T(YAFFS_TRACE_OS,(KERN_DEBUG"yaffs_link link count %d i_count %d\n",
1064 old_dentry->d_inode->i_nlink,atomic_read(&old_dentry->d_inode->i_count)));
1068 yaffs_GrossUnlock(dev);
1082 static int yaffs_symlink(struct inode * dir, struct dentry *dentry, const char * symname)
1087 T(YAFFS_TRACE_OS,(KERN_DEBUG"yaffs_symlink\n"));
1089 dev = yaffs_InodeToObject(dir)->myDev;
1090 yaffs_GrossLock(dev);
1091 obj = yaffs_MknodSymLink(yaffs_InodeToObject(dir), dentry->d_name.name,
1092 S_IFLNK | S_IRWXUGO, current->uid, current->gid,
1094 yaffs_GrossUnlock(dev);
1099 struct inode* inode;
1101 inode = yaffs_get_inode(dir->i_sb, obj->yst_mode, 0, obj);
1102 d_instantiate(dentry, inode);
1103 T(YAFFS_TRACE_OS,(KERN_DEBUG"symlink created OK\n"));
1108 T(YAFFS_TRACE_OS,(KERN_DEBUG"symlink not created\n"));
1115 static int yaffs_sync_object(struct file * file, struct dentry *dentry, int datasync)
1121 obj = yaffs_DentryToObject(dentry);
1125 T(YAFFS_TRACE_OS,(KERN_DEBUG"yaffs_sync_object\n"));
1126 yaffs_GrossLock(dev);
1127 yaffs_FlushFile(obj,1);
1128 yaffs_GrossUnlock(dev);
1133 * The VFS layer already does all the dentry stuff for rename.
1135 * NB: POSIX says you can rename an object over an old object of the same name
1137 static int yaffs_rename(struct inode * old_dir, struct dentry *old_dentry, struct inode * new_dir,struct dentry *new_dentry)
1140 int retVal = YAFFS_FAIL;
1142 yaffs_Object *target;
1144 dev = yaffs_InodeToObject(old_dir)->myDev;
1146 yaffs_GrossLock(dev);
1148 // Check if the target is an existing directory that is not empty.
1149 target = yaffs_FindObjectByName(yaffs_InodeToObject(new_dir),new_dentry->d_name.name);
1152 target->variantType == YAFFS_OBJECT_TYPE_DIRECTORY &&
1153 !list_empty(&target->variant.directoryVariant.children))
1155 retVal = YAFFS_FAIL;
1160 // Unlink the target if it exists
1161 removed = yaffs_Unlink(yaffs_InodeToObject(new_dir),new_dentry->d_name.name);
1164 retVal = yaffs_RenameObject(yaffs_InodeToObject(old_dir),old_dentry->d_name.name,
1165 yaffs_InodeToObject(new_dir),new_dentry->d_name.name);
1168 yaffs_GrossUnlock(dev);
1170 if(retVal == YAFFS_OK)
1172 if(removed == YAFFS_OK)
1174 new_dentry->d_inode->i_nlink--;
1175 mark_inode_dirty(new_dentry->d_inode);
1188 static int yaffs_setattr(struct dentry *dentry, struct iattr *attr)
1190 struct inode *inode = dentry->d_inode;
1194 T(YAFFS_TRACE_OS,(KERN_DEBUG"yaffs_setattr of object %d\n",yaffs_InodeToObject(inode)->objectId));
1196 if((error = inode_change_ok(inode,attr)) == 0)
1199 dev = yaffs_InodeToObject(inode)->myDev;
1200 yaffs_GrossLock(dev);
1201 if(yaffs_SetAttributes(yaffs_InodeToObject(inode),attr) == YAFFS_OK)
1209 yaffs_GrossUnlock(dev);
1211 error = inode_setattr(inode,attr);
1216 //#if defined(CONFIG_KERNEL_2_5) /* Added NCB 185-8-2003 */
1217 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2,5,0))
1218 static int yaffs_statfs(struct super_block *sb, struct kstatfs *buf)
1220 static int yaffs_statfs(struct super_block *sb, struct statfs *buf)
1225 yaffs_Device *dev = yaffs_SuperToDevice(sb);
1226 T(YAFFS_TRACE_OS,(KERN_DEBUG"yaffs_statfs\n"));
1228 yaffs_GrossLock(dev);
1231 buf->f_type = YAFFS_MAGIC;
1232 buf->f_bsize = sb->s_blocksize;
1233 buf->f_namelen = 255;
1234 if(sb->s_blocksize > dev->nBytesPerChunk)
1237 buf->f_blocks = (dev->endBlock - dev->startBlock + 1) * dev->nChunksPerBlock/
1238 (sb->s_blocksize/dev->nBytesPerChunk);
1239 buf->f_bfree = yaffs_GetNumberOfFreeChunks(dev)/
1240 (sb->s_blocksize/dev->nBytesPerChunk);
1245 buf->f_blocks = (dev->endBlock - dev->startBlock + 1) * dev->nChunksPerBlock *
1246 (dev->nBytesPerChunk/sb->s_blocksize);
1247 buf->f_bfree = yaffs_GetNumberOfFreeChunks(dev) *
1248 (dev->nBytesPerChunk/sb->s_blocksize);
1252 buf->f_bavail = buf->f_bfree;
1254 yaffs_GrossUnlock(dev);
1258 static void yaffs_read_inode (struct inode *inode)
1260 // NB This is called as a side effect of other functions and
1261 // thus gross locking should always be in place already.
1264 yaffs_Device *dev = yaffs_SuperToDevice(inode->i_sb);
1266 T(YAFFS_TRACE_OS,(KERN_DEBUG"yaffs_read_inode for %d\n",(int)inode->i_ino));
1268 obj = yaffs_FindObjectByNumber(dev,inode->i_ino);
1270 yaffs_FillInodeFromObject(inode,obj);
1274 static LIST_HEAD(yaffs_dev_list);
1276 static void yaffs_put_super(struct super_block *sb)
1278 yaffs_Device *dev = yaffs_SuperToDevice(sb);
1280 yaffs_GrossLock(dev);
1281 if(dev->putSuperFunc)
1283 dev->putSuperFunc(sb);
1285 yaffs_Deinitialise(dev);
1286 yaffs_GrossUnlock(dev);
1288 /* we assume this is protected by lock_kernel() in mount/umount */
1289 list_del(&dev->devList);
1295 #ifdef CONFIG_YAFFS_MTD_ENABLED
1297 static void yaffs_MTDPutSuper(struct super_block *sb)
1300 struct mtd_info *mtd = yaffs_SuperToDevice(sb)->genericDevice;
1307 put_mtd_device(mtd);
1313 static struct super_block *yaffs_internal_read_super(int yaffsVersion,int useRam, struct super_block * sb, void * data, int silent)
1316 struct inode * inode = NULL;
1317 struct dentry * root;
1318 yaffs_Device *dev = 0;
1321 sb->s_magic = YAFFS_MAGIC;
1322 sb->s_op = &yaffs_super_ops;
1325 printk(KERN_INFO"yaffs: sb is NULL\n");
1327 printk(KERN_INFO"yaffs: sb->s_dev is NULL\n");
1328 else if(! kdevname(sb->s_dev))
1329 printk(KERN_INFO"yaffs: kdevname is NULL\n");
1331 printk(KERN_INFO"yaffs: dev is %d name is \"%s\"\n", sb->s_dev, kdevname(sb->s_dev));
1335 #ifdef CONFIG_YAFFS_USE_CHUNK_SIZE
1336 sb->s_blocksize = YAFFS_BYTES_PER_CHUNK;
1337 sb->s_blocksize_bits = YAFFS_CHUNK_SIZE_SHIFT;
1339 sb->s_blocksize = PAGE_CACHE_SIZE;
1340 sb->s_blocksize_bits = PAGE_CACHE_SHIFT;
1342 T(YAFFS_TRACE_OS,("yaffs_read_super: Using yaffs%d\n",yaffsVersion));
1343 T(YAFFS_TRACE_OS,("yaffs_read_super: %s block size %d\n", useRam ? "RAM" : "MTD",(int)(sb->s_blocksize)));
1345 #ifdef CONFIG_YAFFS_DISABLE_WRITE_VERIFY
1346 T(YAFFS_TRACE_OS,("yaffs: Write verification disabled. All guarantees null and void\n"));
1354 #ifdef CONFIG_YAFFS_RAM_ENABLED
1355 // Set the yaffs_Device up for ram emulation
1358 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2,5,0))
1359 sb->s_fs_info = dev = kmalloc(sizeof(yaffs_Device),GFP_KERNEL);
1361 sb->u.generic_sbp = dev = kmalloc(sizeof(yaffs_Device),GFP_KERNEL);
1366 // Deep shit could not allocate device structure
1367 T(YAFFS_TRACE_OS,("yaffs_read_super: Failed trying to allocate yaffs_Device.\n"));
1371 memset(dev,0,sizeof(yaffs_Device));
1372 dev->genericDevice = NULL; // Not used for RAM emulation.
1373 dev->name = sb->s_type->name;
1375 nBlocks = YAFFS_RAM_EMULATION_SIZE / (YAFFS_CHUNKS_PER_BLOCK * YAFFS_BYTES_PER_CHUNK);
1376 dev->startBlock = 0;
1377 dev->endBlock = nBlocks - 1;
1378 dev->nChunksPerBlock = YAFFS_CHUNKS_PER_BLOCK;
1379 dev->nBytesPerChunk = YAFFS_BYTES_PER_CHUNK;
1380 dev->nReservedBlocks = 5;
1382 if(yaffsVersion == 2)
1384 dev->writeChunkWithTagsToNAND = nandemul2k_WriteChunkWithTagsToNAND;
1385 dev->readChunkWithTagsFromNAND = nandemul2k_ReadChunkWithTagsFromNAND;
1386 dev->markNANDBlockBad = nandemul2k_MarkNANDBlockBad;
1387 dev->queryNANDBlock = nandemul2k_QueryNANDBlock;
1388 dev->eraseBlockInNAND = nandemul2k_EraseBlockInNAND;
1389 dev->initialiseNAND = nandemul2k_InitialiseNAND;
1391 dev->nChunksPerBlock = nandemul2k_GetChunksPerBlock();
1392 dev->nBytesPerChunk = nandemul2k_GetBytesPerChunk();;
1393 nBlocks = nandemul2k_GetNumberOfBlocks();
1394 dev->startBlock = 0;
1395 dev->endBlock = nBlocks - 1;
1399 dev->writeChunkToNAND = nandemul_WriteChunkToNAND;
1400 dev->readChunkFromNAND = nandemul_ReadChunkFromNAND;
1401 dev->eraseBlockInNAND = nandemul_EraseBlockInNAND;
1402 dev->initialiseNAND = nandemul_InitialiseNAND;
1410 #ifdef CONFIG_YAFFS_MTD_ENABLED
1411 struct mtd_info *mtd;
1413 T(YAFFS_TRACE_ALWAYS,("yaffs: Attempting MTD mount on %u.%u, \"%s\"\n",
1414 MAJOR(sb->s_dev),MINOR(sb->s_dev),kdevname(sb->s_dev)));
1416 // Check it's an mtd device.....
1417 if(MAJOR(sb->s_dev) != MTD_BLOCK_MAJOR)
1419 return NULL; // This isn't an mtd device
1423 mtd = get_mtd_device(NULL, MINOR(sb->s_dev));
1426 T(YAFFS_TRACE_ALWAYS,("yaffs: MTD device #%u doesn't appear to exist\n", MINOR(sb->s_dev)));
1431 if(mtd->type != MTD_NANDFLASH)
1433 T(YAFFS_TRACE_ALWAYS,("yaffs: MTD device is not NAND it's type %d\n", mtd->type));
1437 T(YAFFS_TRACE_OS,(" erase %p\n",mtd->erase));
1438 T(YAFFS_TRACE_OS,(" read %p\n",mtd->read));
1439 T(YAFFS_TRACE_OS,(" write %p\n",mtd->write));
1440 T(YAFFS_TRACE_OS,(" readoob %p\n",mtd->read_oob));
1441 T(YAFFS_TRACE_OS,(" writeoob %p\n",mtd->write_oob));
1442 T(YAFFS_TRACE_OS,(" block_isbad %p\n",mtd->block_isbad));
1443 T(YAFFS_TRACE_OS,(" block_markbad %p\n",mtd->block_markbad));
1444 T(YAFFS_TRACE_OS,(" oobblock %d\n",mtd->oobblock));
1445 T(YAFFS_TRACE_OS,(" oobsize %d\n",mtd->oobsize));
1446 T(YAFFS_TRACE_OS,(" erasesize %d\n",mtd->erasesize));
1447 T(YAFFS_TRACE_OS,(" size %d\n",mtd->size));
1449 if(yaffsVersion == 2)
1451 // Check for version 2 style functions
1453 !mtd->block_isbad ||
1454 !mtd->block_markbad ||
1457 #ifndef CONFIG_YAFFS_USE_OLD_MTD
1464 T(YAFFS_TRACE_ALWAYS,("yaffs: MTD device does not support required functions\n"));;
1468 if(mtd->oobblock < YAFFS_MIN_YAFFS2_CHUNK_SIZE ||
1469 mtd->oobsize < YAFFS_MIN_YAFFS2_SPARE_SIZE)
1471 T(YAFFS_TRACE_ALWAYS,("yaffs: MTD device does not support have the right page sizes\n"));
1476 // Check for V1 style functions
1480 #ifndef CONFIG_YAFFS_USE_OLD_MTD
1487 T(YAFFS_TRACE_ALWAYS,("yaffs: MTD device does not support required functions\n"));;
1491 if(mtd->oobblock != YAFFS_BYTES_PER_CHUNK ||
1492 mtd->oobsize != YAFFS_BYTES_PER_SPARE)
1494 T(YAFFS_TRACE_ALWAYS,("yaffs: MTD device does not support have the right page sizes\n"));
1500 // OK, so if we got here, we have an MTD that's NAND and looks
1501 // like it has the right capabilities
1502 // Set the yaffs_Device up for mtd
1504 //#if defined(CONFIG_KERNEL_2_5)
1505 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2,5,0))
1506 sb->s_fs_info = dev = kmalloc(sizeof(yaffs_Device),GFP_KERNEL);
1508 sb->u.generic_sbp = dev = kmalloc(sizeof(yaffs_Device),GFP_KERNEL);
1512 // Deep shit could not allocate device structure
1513 T(YAFFS_TRACE_ALWAYS,("yaffs_read_super: Failed trying to allocate yaffs_Device. \n"));
1517 memset(dev,0,sizeof(yaffs_Device));
1518 dev->genericDevice = mtd;
1519 dev->name = mtd->name;
1521 // Set up the memory size parameters....
1523 nBlocks = mtd->size / (YAFFS_CHUNKS_PER_BLOCK * YAFFS_BYTES_PER_CHUNK);
1524 dev->startBlock = 0;
1525 dev->endBlock = nBlocks - 1;
1526 dev->nChunksPerBlock = YAFFS_CHUNKS_PER_BLOCK;
1527 dev->nBytesPerChunk = YAFFS_BYTES_PER_CHUNK;
1528 dev->nReservedBlocks = 5;
1529 dev->nShortOpCaches = 10; // Enable short op caching
1532 // ... and the functions.
1533 if(yaffsVersion == 2)
1535 dev->writeChunkWithTagsToNAND = nandmtd2_WriteChunkWithTagsToNAND;
1536 dev->readChunkWithTagsFromNAND = nandmtd2_ReadChunkWithTagsFromNAND;
1537 dev->markNANDBlockBad = nandmtd2_MarkNANDBlockBad;
1538 dev->queryNANDBlock = nandmtd2_QueryNANDBlock;
1539 dev->spareBuffer = YMALLOC(mtd->oobsize);
1541 dev->nBytesPerChunk = mtd->oobblock;
1542 dev->nChunksPerBlock = mtd->erasesize / mtd->oobblock;
1543 nBlocks = mtd->size / mtd->erasesize;
1544 dev->startBlock = 0;
1545 dev->endBlock = nBlocks - 1;
1549 dev->writeChunkToNAND = nandmtd_WriteChunkToNAND;
1550 dev->readChunkFromNAND = nandmtd_ReadChunkFromNAND;
1553 // ... and common functions
1554 dev->eraseBlockInNAND = nandmtd_EraseBlockInNAND;
1555 dev->initialiseNAND = nandmtd_InitialiseNAND;
1557 dev->putSuperFunc = yaffs_MTDPutSuper;
1559 #ifdef CONFIG_YAFFS_USE_NANDECC
1560 dev->useNANDECC = 1;
1565 /* we assume this is protected by lock_kernel() in mount/umount */
1566 list_add_tail(&dev->devList, &yaffs_dev_list);
1568 init_MUTEX(&dev->grossLock);
1571 yaffs_GrossLock(dev);
1573 err = yaffs_GutsInitialise(dev);
1575 T(YAFFS_TRACE_OS,("yaffs_read_super: guts initialised %s\n", (err == YAFFS_OK) ? "OK" : "FAILED"));
1577 // Create root inode
1579 inode = yaffs_get_inode(sb, S_IFDIR | 0755, 0,yaffs_Root(dev));
1581 yaffs_GrossUnlock(dev);
1587 inode->i_op = & yaffs_dir_inode_operations;
1588 inode->i_fop = & yaffs_dir_operations;
1590 T(YAFFS_TRACE_OS,("yaffs_read_super: got root inode\n"));
1593 root = d_alloc_root(inode);
1595 T(YAFFS_TRACE_OS,("yaffs_read_super: d_alloc_root done\n"));
1603 T(YAFFS_TRACE_OS,("yaffs_read_super: done\n"));
1608 static int yaffs_internal_read_super_ram(struct super_block * sb, void * data, int silent)
1610 return yaffs_internal_read_super(1,1,sb,data,silent) ? 0 : -1;
1612 static int yaffs_internal_read_super_mtd(struct super_block * sb, void * data, int silent)
1614 return yaffs_internal_read_super(1,0,sb,data,silent) ? 0 : -1;
1617 static int yaffs2_internal_read_super_ram(struct super_block * sb, void * data, int silent)
1619 return yaffs_internal_read_super(2,1,sb,data,silent) ? 0 : -1;
1621 static int yaffs2_internal_read_super_mtd(struct super_block * sb, void * data, int silent)
1623 return yaffs_internal_read_super(2,0,sb,data,silent) ? 0 : -1;
1628 #ifdef CONFIG_YAFFS_MTD_ENABLED
1629 //#if defined(CONFIG_KERNEL_2_5)
1630 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2,5,0))
1631 static struct super_block *yaffs_read_super(struct file_system_type * fs, int flags, const char *dev_name, void *data)
1634 return get_sb_bdev(fs, flags, dev_name, data, yaffs_internal_read_super_mtd);
1637 /* changes NCB 2.5.70 */
1638 //static DECLARE_FSTYPE(yaffs_fs_type, "yaffs", yaffs_read_super, FS_REQUIRES_DEV);
1639 static struct file_system_type yaffs_fs_type = {
1640 .owner = THIS_MODULE,
1642 .get_sb = yaffs_read_super,
1643 .kill_sb = kill_block_super,
1644 // .kill_sb = kill_litter_super,
1645 .fs_flags = FS_REQUIRES_DEV,
1648 static struct super_block *yaffs_read_super(struct super_block * sb, void * data, int silent)
1650 return yaffs_internal_read_super(1,0,sb,data,silent);
1653 static DECLARE_FSTYPE(yaffs_fs_type, "yaffs", yaffs_read_super, FS_REQUIRES_DEV);
1656 #endif // CONFIG_YAFFS_MTD_ENABLED
1658 #ifdef CONFIG_YAFFS2_MTD_ENABLED
1660 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2,5,0))
1661 static struct super_block *yaffs2_read_super(struct file_system_type * fs, int flags, const char *dev_name, void *data)
1664 return get_sb_bdev(fs, flags, dev_name, data, yaffs2_internal_read_super_mtd);
1667 /* changes NCB 2.5.70 */
1668 //static DECLARE_FSTYPE(yaffs_fs_type, "yaffs", yaffs_read_super, FS_REQUIRES_DEV);
1669 static struct file_system_type yaffs2_fs_type = {
1670 .owner = THIS_MODULE,
1672 .get_sb = yaffs2_read_super,
1673 .kill_sb = kill_block_super,
1674 // .kill_sb = kill_litter_super,
1675 .fs_flags = FS_REQUIRES_DEV,
1678 static struct super_block *yaffs2_read_super(struct super_block * sb, void * data, int silent)
1680 return yaffs_internal_read_super(2,0,sb,data,silent);
1683 static DECLARE_FSTYPE(yaffs2_fs_type, "yaffs2", yaffs2_read_super, FS_REQUIRES_DEV);
1686 #endif // CONFIG_YAFFS2_MTD_ENABLED
1689 #ifdef CONFIG_YAFFS_RAM_ENABLED
1691 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2,5,0))
1692 static struct super_block *yaffs_ram_read_super(struct file_system_type * fs, int flags, const char *dev_name, void *data)
1695 return get_sb_nodev(fs, flags, data, yaffs_internal_read_super_ram);
1699 static struct file_system_type yaffs_ram_fs_type = {
1700 .owner = THIS_MODULE,
1702 .get_sb = yaffs_ram_read_super,
1703 .kill_sb = kill_litter_super,
1707 static struct super_block *yaffs_ram_read_super(struct super_block * sb, void * data, int silent)
1709 return yaffs_internal_read_super(1,1,sb,data,silent);
1712 static DECLARE_FSTYPE(yaffs_ram_fs_type, "yaffsram", yaffs_ram_read_super, FS_SINGLE);
1715 #endif // CONFIG_YAFFS_RAM_ENABLED
1717 #ifdef CONFIG_YAFFS2_RAM_ENABLED
1719 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2,5,0))
1720 static struct super_block *yaffs2_ram_read_super(struct file_system_type * fs, int flags, const char *dev_name, void *data)
1723 return get_sb_nodev(fs, flags, data, yaffs2_internal_read_super_ram);
1727 static struct file_system_type yaffs2_ram_fs_type = {
1728 .owner = THIS_MODULE,
1729 .name = "yaffs2ram",
1730 .get_sb = yaffs2_ram_read_super,
1731 .kill_sb = kill_litter_super,
1735 static struct super_block *yaffs2_ram_read_super(struct super_block * sb, void * data, int silent)
1737 return yaffs_internal_read_super(2,1,sb,data,silent);
1740 static DECLARE_FSTYPE(yaffs2_ram_fs_type, "yaffs2ram", yaffs2_ram_read_super, FS_SINGLE);
1743 #endif // CONFIG_YAFFS2_RAM_ENABLED
1747 static struct proc_dir_entry *my_proc_entry;
1748 static struct proc_dir_entry *my_proc_ram_write_entry;
1750 static char * yaffs_dump_dev(char *buf,yaffs_Device *dev)
1752 buf +=sprintf(buf,"startBlock......... %d\n",dev->startBlock);
1753 buf +=sprintf(buf,"endBlock........... %d\n",dev->endBlock);
1754 buf +=sprintf(buf,"chunkGroupBits..... %d\n",dev->chunkGroupBits);
1755 buf +=sprintf(buf,"chunkGroupSize..... %d\n",dev->chunkGroupSize);
1756 buf +=sprintf(buf,"nErasedBlocks...... %d\n",dev->nErasedBlocks);
1757 buf +=sprintf(buf,"nTnodesCreated..... %d\n",dev->nTnodesCreated);
1758 buf +=sprintf(buf,"nFreeTnodes........ %d\n",dev->nFreeTnodes);
1759 buf +=sprintf(buf,"nObjectsCreated.... %d\n",dev->nObjectsCreated);
1760 buf +=sprintf(buf,"nFreeObjects....... %d\n",dev->nFreeObjects);
1761 buf +=sprintf(buf,"nFreeChunks........ %d\n",dev->nFreeChunks);
1762 buf +=sprintf(buf,"nPageWrites........ %d\n",dev->nPageWrites);
1763 buf +=sprintf(buf,"nPageReads......... %d\n",dev->nPageReads);
1764 buf +=sprintf(buf,"nBlockErasures..... %d\n",dev->nBlockErasures);
1765 buf +=sprintf(buf,"nGCCopies.......... %d\n",dev->nGCCopies);
1766 buf +=sprintf(buf,"garbageCollections. %d\n",dev->garbageCollections);
1767 buf +=sprintf(buf,"passiveGCs......... %d\n",dev->passiveGarbageCollections);
1768 buf +=sprintf(buf,"nRetriedWrites..... %d\n",dev->nRetriedWrites);
1769 buf +=sprintf(buf,"nRetireBlocks...... %d\n",dev->nRetiredBlocks);
1770 buf +=sprintf(buf,"eccFixed........... %d\n",dev->eccFixed);
1771 buf +=sprintf(buf,"eccUnfixed......... %d\n",dev->eccUnfixed);
1772 buf +=sprintf(buf,"tagsEccFixed....... %d\n",dev->tagsEccFixed);
1773 buf +=sprintf(buf,"tagsEccUnfixed..... %d\n",dev->tagsEccUnfixed);
1774 buf +=sprintf(buf,"cacheHits.......... %d\n",dev->cacheHits);
1775 buf +=sprintf(buf,"nDeletedFiles...... %d\n",dev->nDeletedFiles);
1776 buf +=sprintf(buf,"nUnlinkedFiles..... %d\n",dev->nUnlinkedFiles);
1777 buf +=sprintf(buf,"nBackgroudDeletions %d\n",dev->nBackgroundDeletions);
1778 buf +=sprintf(buf,"useNANDECC......... %d\n",dev->useNANDECC);
1779 buf +=sprintf(buf,"isYaffs2........... %d\n",dev->isYaffs2);
1784 static int yaffs_proc_read(
1793 struct list_head *item;
1798 /* Get proc_file_read() to step 'offset' by one on each sucessive call.
1799 * We use 'offset' (*ppos) to indicate where we are in devList.
1800 * This also assumes the user has posted a read buffer large
1801 * enough to hold the complete output; but that's life in /proc.
1806 /* Print header first */
1808 buf += sprintf(buf, "YAFFS built:" __DATE__ " "__TIME__
1809 "\n%s\n%s\n", yaffs_fs_c_version, yaffs_guts_c_version);
1812 /* hold lock_kernel while traversing yaffs_dev_list */
1815 /* Locate and print the Nth entry. Order N-squared but N is small. */
1816 list_for_each(item, &yaffs_dev_list) {
1817 yaffs_Device *dev = list_entry(item, yaffs_Device, devList);
1822 buf += sprintf(buf,"\nDevice %d \"%s\"\n", n, dev->name);
1823 buf = yaffs_dump_dev(buf, dev);
1828 return buf-page < count ? buf-page : count;
1831 static int yaffs_proc_ram_write(
1841 printk(KERN_DEBUG "yaffs write size %d\n",count);
1847 // Stuff to handle installation of file systems
1848 struct file_system_to_install
1850 struct file_system_type *fst;
1854 static struct file_system_to_install fs_to_install[] =
1856 #ifdef CONFIG_YAFFS_RAM_ENABLED
1857 { &yaffs_ram_fs_type, 0},
1859 #ifdef CONFIG_YAFFS2_RAM_ENABLED
1860 { &yaffs2_ram_fs_type,0},
1862 #ifdef CONFIG_YAFFS_MTD_ENABLED
1863 { &yaffs_fs_type,0},
1865 #ifdef CONFIG_YAFFS2_MTD_ENABLED
1866 { &yaffs2_fs_type,0},
1871 static int __init init_yaffs_fs(void)
1874 struct file_system_to_install *fsinst;
1876 T(YAFFS_TRACE_ALWAYS,("yaffs " __DATE__ " " __TIME__ " Installing. \n"));
1880 /* Install the proc_fs entry */
1881 my_proc_entry = create_proc_read_entry("yaffs",
1893 // Now add the file system entries
1895 fsinst = fs_to_install;
1897 while(fsinst->fst && !error)
1899 error = register_filesystem(fsinst->fst);
1902 fsinst->installed = 1;
1907 // Any errors? uninstall
1910 fsinst = fs_to_install;
1914 if(fsinst->installed)
1916 unregister_filesystem(fsinst->fst);
1917 fsinst->installed = 0;
1926 static void __exit exit_yaffs_fs(void)
1929 struct file_system_to_install *fsinst;
1931 T(YAFFS_TRACE_ALWAYS,("yaffs " __DATE__ " " __TIME__ " removing. \n"));
1933 remove_proc_entry("yaffs",&proc_root);
1935 fsinst = fs_to_install;
1939 if(fsinst->installed)
1941 unregister_filesystem(fsinst->fst);
1942 fsinst->installed = 0;
1949 module_init(init_yaffs_fs)
1950 module_exit(exit_yaffs_fs)
1952 MODULE_DESCRIPTION("YAFFS2 - a NAND specific flash file system");
1953 MODULE_AUTHOR("Charles Manning, Aleph One Ltd., 2002,2003,2004");
1954 MODULE_LICENSE("GPL");