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 1.16 2005-07-31 03:58:17 marty 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 yaffs_devname(sb, buf) bdevname(sb->s_bdev, buf) // FIXME: use sb->s_id instead ?
64 #include <linux/locks.h>
65 #define BDEVNAME_SIZE 0
66 #define yaffs_devname(sb, buf) kdevname(sb->s_dev)
70 #include <asm/uaccess.h>
73 #include "yaffs_guts.h"
78 unsigned yaffs_traceMask = YAFFS_TRACE_ALWAYS | YAFFS_TRACE_BAD_BLOCKS;
79 //unsigned yaffs_traceMask = 0xFFFFFFFF;
82 #ifdef CONFIG_YAFFS_RAM_ENABLED
83 #include "yaffs_nandemul.h"
84 // 2 MB of RAM for emulation
85 #define YAFFS_RAM_EMULATION_SIZE 0x200000
86 #endif //CONFIG_YAFFS_RAM_ENABLED
88 #if CONFIG_YAFFS2_RAM_ENABLED
89 #include "yaffs_nandemul2k.h"
92 #ifdef CONFIG_YAFFS_MTD_ENABLED
93 #include <linux/mtd/mtd.h>
94 #include "yaffs_mtdif.h"
95 #include "yaffs_mtdif2.h"
96 #endif //CONFIG_YAFFS_MTD_ENABLED
98 //#define T(x) printk x
102 #define yaffs_InodeToObject(iptr) ((yaffs_Object *)((iptr)->u.generic_ip))
103 #define yaffs_DentryToObject(dptr) yaffs_InodeToObject((dptr)->d_inode)
104 //NCB #define yaffs_SuperToDevice(sb) ((yaffs_Device *)sb->u.generic_sbp)
106 //#if defined(CONFIG_KERNEL_2_5)
107 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2,5,0))
108 #define yaffs_SuperToDevice(sb) ((yaffs_Device *)sb->s_fs_info)
110 #define yaffs_SuperToDevice(sb) ((yaffs_Device *)sb->u.generic_sbp)
114 static void yaffs_put_super(struct super_block *sb);
117 static ssize_t yaffs_file_read(struct file *f, char *buf, size_t n, loff_t *pos);
120 static ssize_t yaffs_file_write(struct file *f, const char *buf, size_t n, loff_t *pos);
122 static int yaffs_file_flush(struct file* file);
124 static int yaffs_sync_object(struct file * file, struct dentry *dentry, int datasync);
126 static int yaffs_readdir(struct file *f, void *dirent, filldir_t filldir);
128 //#if defined(CONFIG_KERNEL_2_5) /* Added NCB 185-8-2003 */
129 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2,5,0))
130 static int yaffs_create(struct inode *dir, struct dentry *dentry, int mode, struct nameidata *n);
131 static struct dentry * yaffs_lookup(struct inode *dir, struct dentry *dentry, struct nameidata *n);
133 static int yaffs_create(struct inode *dir, struct dentry *dentry, int mode);
134 static struct dentry * yaffs_lookup(struct inode *dir, struct dentry *dentry);
136 static int yaffs_link(struct dentry *old_dentry, struct inode * dir, struct dentry * dentry);
137 static int yaffs_unlink(struct inode * dir, struct dentry *dentry);
138 static int yaffs_symlink(struct inode * dir, struct dentry *dentry, const char * symname);
139 static int yaffs_mkdir(struct inode * dir, struct dentry * dentry, int mode);
141 //#if defined(CONFIG_KERNEL_2_5)
142 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2,5,0))
143 static int yaffs_mknod(struct inode *dir, struct dentry *dentry, int mode, dev_t dev);
145 static int yaffs_mknod(struct inode *dir, struct dentry *dentry, int mode, int dev);
147 static int yaffs_rename(struct inode * old_dir, struct dentry *old_dentry, struct inode * new_dir,struct dentry *new_dentry);
148 static int yaffs_setattr(struct dentry *dentry, struct iattr *attr);
150 //#if defined(CONFIG_KERNEL_2_5) /* Added NCB 185-8-2003 */
151 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2,5,0))
152 static int yaffs_statfs(struct super_block *sb, struct kstatfs *buf);
154 static int yaffs_statfs(struct super_block *sb, struct statfs *buf);
156 static void yaffs_read_inode (struct inode *inode);
158 static void yaffs_put_inode (struct inode *inode);
159 static void yaffs_delete_inode(struct inode *);
160 static void yaffs_clear_inode(struct inode *);
162 static int yaffs_readpage(struct file *file, struct page * page);
163 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2,5,0))
164 static int yaffs_writepage(struct page *page, struct writeback_control *wbc);
166 static int yaffs_writepage(struct page *page);
168 static int yaffs_prepare_write(struct file *f, struct page *pg, unsigned offset, unsigned to);
169 static int yaffs_commit_write(struct file *f, struct page *pg, unsigned offset, unsigned to);
171 static int yaffs_readlink(struct dentry *dentry, char __user *buffer, int buflen);
172 static int yaffs_follow_link(struct dentry *dentry, struct nameidata *nd);
176 static struct address_space_operations yaffs_file_address_operations = {
177 .readpage = yaffs_readpage,
178 .writepage = yaffs_writepage,
179 .prepare_write = yaffs_prepare_write,
180 .commit_write = yaffs_commit_write,
183 static struct file_operations yaffs_file_operations = {
184 .read = generic_file_read,
185 .write = generic_file_write,
186 .mmap = generic_file_mmap,
187 .flush = yaffs_file_flush,
188 .fsync = yaffs_sync_object,
191 static struct inode_operations yaffs_file_inode_operations = {
192 .setattr = yaffs_setattr,
195 struct inode_operations yaffs_symlink_inode_operations = {
196 .readlink = yaffs_readlink,
197 .follow_link = yaffs_follow_link,
198 .setattr = yaffs_setattr,
201 static struct inode_operations yaffs_dir_inode_operations = {
202 .create = yaffs_create,
203 .lookup = yaffs_lookup,
205 .unlink = yaffs_unlink,
206 .symlink = yaffs_symlink,
207 .mkdir = yaffs_mkdir,
208 .rmdir = yaffs_unlink,
209 .mknod = yaffs_mknod,
210 .rename = yaffs_rename,
211 .setattr = yaffs_setattr,
214 static struct file_operations yaffs_dir_operations = {
215 .read = generic_read_dir,
216 .readdir = yaffs_readdir,
217 .fsync = yaffs_sync_object,
220 static struct super_operations yaffs_super_ops = {
221 .statfs = yaffs_statfs,
222 .read_inode = yaffs_read_inode,
223 .put_inode = yaffs_put_inode,
224 .put_super = yaffs_put_super,
225 .delete_inode = yaffs_delete_inode,
226 .clear_inode = yaffs_clear_inode,
231 static void yaffs_GrossLock(yaffs_Device *dev)
233 T(YAFFS_TRACE_OS,(KERN_DEBUG"yaffs locking\n"));
235 down(&dev->grossLock);
238 static void yaffs_GrossUnlock(yaffs_Device *dev)
240 T(YAFFS_TRACE_OS,(KERN_DEBUG"yaffs unlocking\n"));
245 static int yaffs_readlink(struct dentry *dentry, char __user *buffer, int buflen)
247 unsigned char *alias;
250 yaffs_Device *dev = yaffs_DentryToObject(dentry)->myDev;
253 yaffs_GrossLock(dev);
255 alias = yaffs_GetSymlinkAlias(yaffs_DentryToObject(dentry));
257 yaffs_GrossUnlock(dev);
262 ret = vfs_readlink(dentry, buffer, buflen, alias);
267 static int yaffs_follow_link(struct dentry *dentry, struct nameidata *nd)
269 unsigned char *alias;
271 yaffs_Device *dev = yaffs_DentryToObject(dentry)->myDev;
274 yaffs_GrossLock(dev);
276 alias = yaffs_GetSymlinkAlias(yaffs_DentryToObject(dentry));
278 yaffs_GrossUnlock(dev);
283 ret = vfs_follow_link(nd,alias);
289 struct inode *yaffs_get_inode(struct super_block *sb, int mode, int dev,yaffs_Object *obj);
292 * Lookup is used to find objects in the fs
294 //#if defined(CONFIG_KERNEL_2_5) /* Added NCB 185-8-2003 */
295 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2,5,0))
297 static struct dentry * yaffs_lookup(struct inode *dir, struct dentry *dentry, struct nameidata *n)
299 static struct dentry * yaffs_lookup(struct inode *dir, struct dentry *dentry)
303 struct inode *inode = NULL; // NCB 2.5/2.6 needs NULL here
305 yaffs_Device *dev = yaffs_InodeToObject(dir)->myDev;
308 yaffs_GrossLock(dev);
311 T(YAFFS_TRACE_OS,(KERN_DEBUG"yaffs_lookup for %d:%s\n",yaffs_InodeToObject(dir)->objectId,dentry->d_name.name));
313 obj = yaffs_FindObjectByName(yaffs_InodeToObject(dir),dentry->d_name.name);
315 obj = yaffs_GetEquivalentObject(obj); // in case it was a hardlink
321 T(YAFFS_TRACE_OS,(KERN_DEBUG"yaffs_lookup found %d\n",obj->objectId));
323 inode = yaffs_get_inode(dir->i_sb, obj->yst_mode,0,obj);
327 T(YAFFS_TRACE_OS,(KERN_DEBUG"yaffs_loookup dentry \n"));
328 /* #if 0 asserted by NCB for 2.5/6 compatability - falls through to d_add even if NULL inode */
330 //dget(dentry); // try to solve directory bug
333 yaffs_GrossUnlock(dev);
343 T(YAFFS_TRACE_OS,(KERN_DEBUG"yaffs_lookup not found\n"));
346 yaffs_GrossUnlock(dev);
348 /* added NCB for 2.5/6 compatability - forces add even if inode is NULL which creates dentry hash*/
352 // return (ERR_PTR(-EIO));
356 // For now put inode is just for debugging
357 // Put inode is called when the inode **structure** is put.
358 static void yaffs_put_inode(struct inode *inode)
360 T(YAFFS_TRACE_OS,("yaffs_put_inode: ino %d, count %d\n",(int)inode->i_ino, atomic_read(&inode->i_count)));
364 // clear is called to tell the fs to release any per-inode data it holds
365 static void yaffs_clear_inode(struct inode *inode)
370 obj = yaffs_InodeToObject(inode);
372 T(YAFFS_TRACE_OS,("yaffs_clear_inode: ino %d, count %d %s\n",(int)inode->i_ino, atomic_read(&inode->i_count),
373 obj ? "object exists" : "null object"));
378 yaffs_GrossLock(dev);
380 // Clear the association between the inode ant the yaffs_Object.
382 inode->u.generic_ip = NULL;
384 // If the object freeing was deferred, then the real free happens now.
385 // This should fix the inode inconsistency problem.
387 yaffs_HandleDeferedFree(obj);
389 yaffs_GrossUnlock(dev);
395 // delete is called when the link count is zero and the inode
396 // is put (ie. nobody wants to know about it anymore, time to
398 // NB Must call clear_inode()
399 static void yaffs_delete_inode(struct inode *inode)
401 yaffs_Object *obj = yaffs_InodeToObject(inode);
404 T(YAFFS_TRACE_OS,("yaffs_delete_inode: ino %d, count %d %s\n",(int)inode->i_ino, atomic_read(&inode->i_count),
405 obj ? "object exists" : "null object"));
410 yaffs_GrossLock(dev);
411 yaffs_DeleteFile(obj);
412 yaffs_GrossUnlock(dev);
418 static int yaffs_file_flush(struct file* file)
420 yaffs_Object *obj = yaffs_DentryToObject(file->f_dentry);
422 yaffs_Device *dev = obj->myDev;
424 T(YAFFS_TRACE_OS,(KERN_DEBUG"yaffs_file_flush object %d (%s)\n",obj->objectId,
425 obj->dirty ? "dirty" : "clean"));
427 yaffs_GrossLock(dev);
429 yaffs_FlushFile(obj,1);
431 yaffs_GrossUnlock(dev);
438 static int yaffs_readpage_nolock(struct file *f, struct page * pg)
443 unsigned char *pg_buf;
448 T(YAFFS_TRACE_OS,(KERN_DEBUG"yaffs_readpage at %08x, size %08x\n",
449 (unsigned)(pg->index << PAGE_CACHE_SHIFT), (unsigned)PAGE_CACHE_SIZE));
451 obj = yaffs_DentryToObject(f->f_dentry);
456 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2,5,0))
457 BUG_ON(!PageLocked(pg));
464 /* FIXME: Can kmap fail? */
466 yaffs_GrossLock(dev);
468 ret = yaffs_ReadDataFromFile(obj, pg_buf, pg->index << PAGE_CACHE_SHIFT, PAGE_CACHE_SIZE);
470 yaffs_GrossUnlock(dev);
472 if(ret >= 0) ret = 0;
475 ClearPageUptodate(pg);
482 flush_dcache_page(pg);
486 T(YAFFS_TRACE_OS,(KERN_DEBUG"yaffs_readpage done\n"));
490 static int yaffs_readpage_unlock(struct file *f, struct page *pg)
492 int ret = yaffs_readpage_nolock(f,pg);
497 static int yaffs_readpage(struct file *f, struct page * pg)
499 return yaffs_readpage_unlock(f,pg);
502 // writepage inspired by/stolen from smbfs
505 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2,5,0))
506 static int yaffs_writepage(struct page *page, struct writeback_control *wbc)
508 static int yaffs_writepage(struct page *page)
511 struct address_space *mapping = page->mapping;
513 unsigned long end_index;
521 inode = mapping->host;
525 end_index = inode->i_size >> PAGE_CACHE_SHIFT;
528 if (page->index < end_index)
530 nBytes = PAGE_CACHE_SIZE;
534 nBytes = inode->i_size & (PAGE_CACHE_SIZE-1);
536 // What's happening here?
537 ///* OK, are we completely out? */
538 //if (page->index >= end_index+1 || !offset)
546 obj = yaffs_InodeToObject(inode);
547 yaffs_GrossLock(obj->myDev);
550 nWritten = yaffs_WriteDataToFile(obj,buffer,page->index << PAGE_CACHE_SHIFT,nBytes,0);
552 yaffs_GrossUnlock(obj->myDev);
555 SetPageUptodate(page);
559 return (nWritten == nBytes) ? 0 : -ENOSPC;
564 static int yaffs_prepare_write(struct file *f, struct page *pg, unsigned offset, unsigned to)
567 T(YAFFS_TRACE_OS,(KERN_DEBUG"yaffs_prepair_write\n"));
568 if(!Page_Uptodate(pg) && (offset || to < PAGE_CACHE_SIZE))
569 return yaffs_readpage_nolock(f,pg);
575 static int yaffs_commit_write(struct file *f, struct page *pg, unsigned offset, unsigned to)
578 void *addr = page_address(pg) + offset;
579 loff_t pos = (((loff_t)pg->index) << PAGE_CACHE_SHIFT) + offset;
580 int nBytes = to - offset;
584 unsigned saddr = (unsigned)addr;
586 T(YAFFS_TRACE_OS,(KERN_DEBUG"yaffs_commit_write addr %x pos %x nBytes %d\n",saddr,spos,nBytes));
588 nWritten = yaffs_file_write(f,addr, nBytes, &pos);
590 if(nWritten != nBytes)
592 T(YAFFS_TRACE_OS,(KERN_DEBUG"yaffs_commit_write not same size nWritten %d nBytes %d\n",nWritten,nBytes));
594 ClearPageUptodate(pg);
601 T(YAFFS_TRACE_OS,(KERN_DEBUG"yaffs_commit_write returning %d\n",nWritten));
609 static void yaffs_FillInodeFromObject(struct inode *inode, yaffs_Object *obj)
613 inode->i_ino = obj->objectId;
614 inode->i_mode = obj->yst_mode;
615 inode->i_uid = obj->yst_uid;
616 inode->i_gid = obj->yst_gid;
617 inode->i_blksize = inode->i_sb->s_blocksize;
618 //#if defined(CONFIG_KERNEL_2_5)
619 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2,5,0))
621 inode->i_rdev = old_decode_dev(obj->yst_rdev);
622 inode->i_atime.tv_sec = (time_t)(obj->yst_atime);
623 inode->i_atime.tv_nsec = 0;
624 inode->i_mtime.tv_sec = (time_t)obj->yst_mtime;
625 inode->i_mtime.tv_nsec =0;
626 inode->i_ctime.tv_sec = (time_t)obj->yst_ctime;
627 inode->i_ctime.tv_nsec = 0;
629 inode->i_rdev = obj->yst_rdev;
630 inode->i_atime = obj->yst_atime;
631 inode->i_mtime = obj->yst_mtime;
632 inode->i_ctime = obj->yst_ctime;
634 inode->i_size = yaffs_GetObjectFileLength(obj);
635 inode->i_blocks = (inode->i_size + 511) >> 9;
637 inode->i_nlink = yaffs_GetObjectLinkCount(obj);
639 T(YAFFS_TRACE_OS,(KERN_DEBUG"yaffs_FillInode mode %x uid %d gid %d size %d count %d\n",
640 inode->i_mode, inode->i_uid, inode->i_gid, (int)inode->i_size, atomic_read(&inode->i_count)));
642 switch (obj->yst_mode & S_IFMT)
644 default: // fifo, device or socket
645 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2,5,0))
646 init_special_inode(inode, obj->yst_mode,old_decode_dev(obj->yst_rdev));
648 init_special_inode(inode, obj->yst_mode,(dev_t)(obj->yst_rdev));
651 case S_IFREG: // file
652 inode->i_op = &yaffs_file_inode_operations;
653 inode->i_fop = &yaffs_file_operations;
654 inode->i_mapping->a_ops = &yaffs_file_address_operations;
656 case S_IFDIR: // directory
657 inode->i_op = &yaffs_dir_inode_operations;
658 inode->i_fop = &yaffs_dir_operations;
660 case S_IFLNK: // symlink
661 inode->i_op = &yaffs_symlink_inode_operations;
666 inode->u.generic_ip = obj;
667 obj->myInode = inode;
672 T(YAFFS_TRACE_OS,(KERN_DEBUG"yaffs_FileInode invalid parameters\n"));
677 struct inode *yaffs_get_inode(struct super_block *sb, int mode, int dev,yaffs_Object *obj)
679 struct inode * inode;
683 T(YAFFS_TRACE_OS,(KERN_DEBUG"yaffs_get_inode for NULL super_block!!\n"));
690 T(YAFFS_TRACE_OS,(KERN_DEBUG"yaffs_get_inode for NULL object!!\n"));
695 T(YAFFS_TRACE_OS,(KERN_DEBUG"yaffs_get_inode for object %d\n",obj->objectId));
697 inode = iget(sb,obj->objectId);
699 // NB Side effect: iget calls back to yaffs_read_inode().
700 // iget also increments the inode's i_count
707 // No longer used because we use generic rw */
708 static ssize_t yaffs_file_read(struct file *f, char *buf, size_t n, loff_t *pos)
715 T(YAFFS_TRACE_OS,(KERN_DEBUG"yaffs_file_read\n"));
717 obj = yaffs_DentryToObject(f->f_dentry);
721 yaffs_GrossLock(dev);
723 inode = f->f_dentry->d_inode;
725 if (*pos < inode->i_size)
727 if (*pos + n > inode->i_size)
729 n = inode->i_size - *pos;
737 nRead = yaffs_ReadDataFromFile(obj,buf,*pos,n);
743 yaffs_GrossUnlock(dev);
747 T(YAFFS_TRACE_OS,(KERN_DEBUG"yaffs_file_read read %d bytes, %d read at %d\n",n,nRead,ipos));
754 static ssize_t yaffs_file_write(struct file *f, const char *buf, size_t n, loff_t *pos)
762 obj = yaffs_DentryToObject(f->f_dentry);
766 yaffs_GrossLock(dev);
768 inode = f->f_dentry->d_inode;
770 if(!S_ISBLK(inode->i_mode) && f->f_flags & O_APPEND)
772 ipos = inode->i_size;
782 T(YAFFS_TRACE_OS,(KERN_DEBUG"yaffs_file_write: hey obj is null!\n"));
786 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));
789 nWritten = yaffs_WriteDataToFile(obj,buf,ipos,n,0);
791 T(YAFFS_TRACE_OS,(KERN_DEBUG"yaffs_file_write writing %d bytes, %d written at %d\n",n,nWritten,ipos));
796 if(ipos > inode->i_size)
798 inode->i_size = ipos;
799 inode->i_blocks = (ipos + 511)>>9;
801 T(YAFFS_TRACE_OS,(KERN_DEBUG"yaffs_file_write size updated to %d bytes, %d blocks\n",ipos,(int)(inode->i_blocks)));
805 yaffs_GrossUnlock(dev);
807 return nWritten != n ? -ENOSPC : nWritten;
812 static int yaffs_readdir(struct file *f, void *dirent, filldir_t filldir)
816 struct inode *inode = f->f_dentry->d_inode;
817 unsigned long offset, curoffs;
821 char name[YAFFS_MAX_NAME_LENGTH +1];
823 obj = yaffs_DentryToObject(f->f_dentry);
826 yaffs_GrossLock(dev);
830 T(YAFFS_TRACE_OS,("yaffs_readdir: starting at %d\n",(int)offset));
834 T(YAFFS_TRACE_OS,(KERN_DEBUG"yaffs_readdir: entry . ino %d \n",(int)inode->i_ino));
835 if(filldir(dirent,".",1,offset,inode->i_ino,DT_DIR) < 0)
844 T(YAFFS_TRACE_OS,(KERN_DEBUG"yaffs_readdir: entry .. ino %d \n",(int)f->f_dentry->d_parent->d_inode->i_ino));
845 if(filldir(dirent,"..",2,offset,f->f_dentry->d_parent->d_inode->i_ino,DT_DIR) < 0)
855 list_for_each(i,&obj->variant.directoryVariant.children)
858 if(curoffs >= offset)
860 l = list_entry(i, yaffs_Object,siblings);
862 yaffs_GetObjectName(l,name,YAFFS_MAX_NAME_LENGTH+1);
863 T(YAFFS_TRACE_OS,(KERN_DEBUG"yaffs_readdir: %s inode %d\n",name,yaffs_GetObjectInode(l)));
869 yaffs_GetObjectInode(l),
870 yaffs_GetObjectType(l))
884 yaffs_GrossUnlock(dev);
891 * File creation. Allocate an inode, and we're done..
893 //#if defined(CONFIG_KERNEL_2_5)
894 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2,5,0))
895 static int yaffs_mknod(struct inode *dir, struct dentry *dentry, int mode, dev_t rdev)
897 static int yaffs_mknod(struct inode *dir, struct dentry *dentry, int mode, int rdev)
902 yaffs_Object *obj = NULL;
905 yaffs_Object *parent = yaffs_InodeToObject(dir);
908 uid_t uid = current->fsuid;
909 gid_t gid = (dir->i_mode & S_ISGID) ? dir->i_gid : current->fsgid;
913 T(YAFFS_TRACE_OS,(KERN_DEBUG"yaffs_mknod: parent object %d type %d\n",
914 parent->objectId,parent->variantType));
918 T(YAFFS_TRACE_OS,(KERN_DEBUG"yaffs_mknod: could not get parent object\n"));
922 T(YAFFS_TRACE_OS,("yaffs_mknod: making oject for %s, mode %x dev %x\n",
923 dentry->d_name.name, mode,rdev));
927 yaffs_GrossLock(dev);
929 switch (mode & S_IFMT)
932 // Special (socket, fifo, device...)
933 T(YAFFS_TRACE_OS,(KERN_DEBUG"yaffs_mknod: making special\n"));
934 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2,5,0))
935 obj = yaffs_MknodSpecial(parent,dentry->d_name.name,mode,uid, gid,old_encode_dev(rdev));
937 obj = yaffs_MknodSpecial(parent,dentry->d_name.name,mode,uid, gid,rdev);
940 case S_IFREG: // file
941 T(YAFFS_TRACE_OS,(KERN_DEBUG"yaffs_mknod: making file\n"));
942 obj = yaffs_MknodFile(parent,dentry->d_name.name,mode,uid, gid);
944 case S_IFDIR: // directory
945 T(YAFFS_TRACE_OS,(KERN_DEBUG"yaffs_mknod: making directory\n"));
946 obj = yaffs_MknodDirectory(parent,dentry->d_name.name,mode,uid, gid);
948 case S_IFLNK: // symlink
949 T(YAFFS_TRACE_OS,(KERN_DEBUG"yaffs_mknod: making file\n"));
950 obj = NULL; // Do we ever get here?
956 inode = yaffs_get_inode(dir->i_sb, mode, rdev, obj);
957 d_instantiate(dentry, inode);
958 T(YAFFS_TRACE_OS,(KERN_DEBUG"yaffs_mknod created object %d count = %d\n",obj->objectId,atomic_read(&inode->i_count)));
963 T(YAFFS_TRACE_OS,(KERN_DEBUG"yaffs_mknod failed making object\n"));
967 yaffs_GrossUnlock(dev);
972 static int yaffs_mkdir(struct inode * dir, struct dentry * dentry, int mode)
975 T(YAFFS_TRACE_OS,(KERN_DEBUG"yaffs_mkdir\n"));
976 retVal = yaffs_mknod(dir, dentry, mode | S_IFDIR, 0);
978 // attempt to fix dir bug - didn't work
987 //#if defined(CONFIG_KERNEL_2_5) /* Added NCB 185-8-2003 */
988 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2,5,0))
989 static int yaffs_create(struct inode *dir, struct dentry *dentry, int mode, struct nameidata *n)
991 static int yaffs_create(struct inode *dir, struct dentry *dentry, int mode)
994 T(YAFFS_TRACE_OS,(KERN_DEBUG"yaffs_create\n"));
995 return yaffs_mknod(dir, dentry, mode | S_IFREG, 0);
999 static int yaffs_unlink(struct inode * dir, struct dentry *dentry)
1006 T(YAFFS_TRACE_OS,(KERN_DEBUG"yaffs_unlink %d:%s\n",(int)(dir->i_ino),dentry->d_name.name));
1008 dev = yaffs_InodeToObject(dir)->myDev;
1010 yaffs_GrossLock(dev);
1013 retVal = yaffs_Unlink(yaffs_InodeToObject(dir),dentry->d_name.name);
1016 yaffs_GrossUnlock(dev);
1018 if( retVal == YAFFS_OK)
1020 dentry->d_inode->i_nlink--;
1021 mark_inode_dirty(dentry->d_inode);
1034 static int yaffs_link(struct dentry *old_dentry, struct inode * dir, struct dentry * dentry)
1036 struct inode *inode = old_dentry->d_inode;
1037 yaffs_Object *obj = NULL;
1038 yaffs_Object *link=NULL;
1041 T(YAFFS_TRACE_OS,(KERN_DEBUG"yaffs_link\n"));
1043 obj = yaffs_InodeToObject(inode);
1046 yaffs_GrossLock(dev);
1048 if (!S_ISDIR(inode->i_mode)) // Don't link directories
1050 link = yaffs_Link(yaffs_InodeToObject(dir),dentry->d_name.name,obj);
1056 old_dentry->d_inode->i_nlink = yaffs_GetObjectLinkCount(obj);
1057 d_instantiate(dentry, old_dentry->d_inode);
1058 atomic_inc(&old_dentry->d_inode->i_count);
1059 T(YAFFS_TRACE_OS,(KERN_DEBUG"yaffs_link link count %d i_count %d\n",
1060 old_dentry->d_inode->i_nlink,atomic_read(&old_dentry->d_inode->i_count)));
1064 yaffs_GrossUnlock(dev);
1078 static int yaffs_symlink(struct inode * dir, struct dentry *dentry, const char * symname)
1082 uid_t uid = current->fsuid;
1083 gid_t gid = (dir->i_mode & S_ISGID) ? dir->i_gid : current->fsgid;
1085 T(YAFFS_TRACE_OS,(KERN_DEBUG"yaffs_symlink\n"));
1087 dev = yaffs_InodeToObject(dir)->myDev;
1088 yaffs_GrossLock(dev);
1089 obj = yaffs_MknodSymLink(yaffs_InodeToObject(dir), dentry->d_name.name,
1090 S_IFLNK | S_IRWXUGO, uid, gid,
1092 yaffs_GrossUnlock(dev);
1097 struct inode* inode;
1099 inode = yaffs_get_inode(dir->i_sb, obj->yst_mode, 0, obj);
1100 d_instantiate(dentry, inode);
1101 T(YAFFS_TRACE_OS,(KERN_DEBUG"symlink created OK\n"));
1106 T(YAFFS_TRACE_OS,(KERN_DEBUG"symlink not created\n"));
1113 static int yaffs_sync_object(struct file * file, struct dentry *dentry, int datasync)
1119 obj = yaffs_DentryToObject(dentry);
1123 T(YAFFS_TRACE_OS,(KERN_DEBUG"yaffs_sync_object\n"));
1124 yaffs_GrossLock(dev);
1125 yaffs_FlushFile(obj,1);
1126 yaffs_GrossUnlock(dev);
1131 * The VFS layer already does all the dentry stuff for rename.
1133 * NB: POSIX says you can rename an object over an old object of the same name
1135 static int yaffs_rename(struct inode * old_dir, struct dentry *old_dentry, struct inode * new_dir,struct dentry *new_dentry)
1138 int retVal = YAFFS_FAIL;
1140 yaffs_Object *target;
1142 dev = yaffs_InodeToObject(old_dir)->myDev;
1144 yaffs_GrossLock(dev);
1146 // Check if the target is an existing directory that is not empty.
1147 target = yaffs_FindObjectByName(yaffs_InodeToObject(new_dir),new_dentry->d_name.name);
1150 target->variantType == YAFFS_OBJECT_TYPE_DIRECTORY &&
1151 !list_empty(&target->variant.directoryVariant.children))
1153 retVal = YAFFS_FAIL;
1158 // Unlink the target if it exists
1159 removed = yaffs_Unlink(yaffs_InodeToObject(new_dir),new_dentry->d_name.name);
1162 retVal = yaffs_RenameObject(yaffs_InodeToObject(old_dir),old_dentry->d_name.name,
1163 yaffs_InodeToObject(new_dir),new_dentry->d_name.name);
1166 yaffs_GrossUnlock(dev);
1168 if(retVal == YAFFS_OK)
1170 if(removed == YAFFS_OK)
1172 new_dentry->d_inode->i_nlink--;
1173 mark_inode_dirty(new_dentry->d_inode);
1186 static int yaffs_setattr(struct dentry *dentry, struct iattr *attr)
1188 struct inode *inode = dentry->d_inode;
1192 T(YAFFS_TRACE_OS,(KERN_DEBUG"yaffs_setattr of object %d\n",yaffs_InodeToObject(inode)->objectId));
1194 if((error = inode_change_ok(inode,attr)) == 0)
1197 dev = yaffs_InodeToObject(inode)->myDev;
1198 yaffs_GrossLock(dev);
1199 if(yaffs_SetAttributes(yaffs_InodeToObject(inode),attr) == YAFFS_OK)
1207 yaffs_GrossUnlock(dev);
1209 error = inode_setattr(inode,attr);
1214 //#if defined(CONFIG_KERNEL_2_5) /* Added NCB 185-8-2003 */
1215 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2,5,0))
1216 static int yaffs_statfs(struct super_block *sb, struct kstatfs *buf)
1218 static int yaffs_statfs(struct super_block *sb, struct statfs *buf)
1223 yaffs_Device *dev = yaffs_SuperToDevice(sb);
1224 T(YAFFS_TRACE_OS,(KERN_DEBUG"yaffs_statfs\n"));
1226 yaffs_GrossLock(dev);
1229 buf->f_type = YAFFS_MAGIC;
1230 buf->f_bsize = sb->s_blocksize;
1231 buf->f_namelen = 255;
1232 if(sb->s_blocksize > dev->nBytesPerChunk)
1235 buf->f_blocks = (dev->endBlock - dev->startBlock + 1) * dev->nChunksPerBlock/
1236 (sb->s_blocksize/dev->nBytesPerChunk);
1237 buf->f_bfree = yaffs_GetNumberOfFreeChunks(dev)/
1238 (sb->s_blocksize/dev->nBytesPerChunk);
1243 buf->f_blocks = (dev->endBlock - dev->startBlock + 1) * dev->nChunksPerBlock *
1244 (dev->nBytesPerChunk/sb->s_blocksize);
1245 buf->f_bfree = yaffs_GetNumberOfFreeChunks(dev) *
1246 (dev->nBytesPerChunk/sb->s_blocksize);
1250 buf->f_bavail = buf->f_bfree;
1252 yaffs_GrossUnlock(dev);
1256 static void yaffs_read_inode (struct inode *inode)
1258 // NB This is called as a side effect of other functions and
1259 // thus gross locking should always be in place already.
1262 yaffs_Device *dev = yaffs_SuperToDevice(inode->i_sb);
1264 T(YAFFS_TRACE_OS,(KERN_DEBUG"yaffs_read_inode for %d\n",(int)inode->i_ino));
1266 obj = yaffs_FindObjectByNumber(dev,inode->i_ino);
1268 yaffs_FillInodeFromObject(inode,obj);
1272 static LIST_HEAD(yaffs_dev_list);
1274 static void yaffs_put_super(struct super_block *sb)
1276 yaffs_Device *dev = yaffs_SuperToDevice(sb);
1278 yaffs_GrossLock(dev);
1279 if(dev->putSuperFunc)
1281 dev->putSuperFunc(sb);
1283 yaffs_Deinitialise(dev);
1284 yaffs_GrossUnlock(dev);
1286 /* we assume this is protected by lock_kernel() in mount/umount */
1287 list_del(&dev->devList);
1293 #ifdef CONFIG_YAFFS_MTD_ENABLED
1295 static void yaffs_MTDPutSuper(struct super_block *sb)
1298 struct mtd_info *mtd = yaffs_SuperToDevice(sb)->genericDevice;
1305 put_mtd_device(mtd);
1311 static struct super_block *yaffs_internal_read_super(int yaffsVersion,int useRam, struct super_block * sb, void * data, int silent)
1314 struct inode * inode = NULL;
1315 struct dentry * root;
1316 yaffs_Device *dev = 0;
1317 char devname_buf[BDEVNAME_SIZE+1];
1320 sb->s_magic = YAFFS_MAGIC;
1321 sb->s_op = &yaffs_super_ops;
1324 printk(KERN_INFO"yaffs: sb is NULL\n");
1326 printk(KERN_INFO"yaffs: sb->s_dev is NULL\n");
1327 else if(!yaffs_devname(sb, devname_buf))
1328 printk(KERN_INFO"yaffs: devname is NULL\n");
1330 printk(KERN_INFO"yaffs: dev is %d name is \"%s\"\n", sb->s_dev, yaffs_devname(sb, devname_buf));
1334 #ifdef CONFIG_YAFFS_USE_CHUNK_SIZE
1335 sb->s_blocksize = YAFFS_BYTES_PER_CHUNK;
1336 sb->s_blocksize_bits = YAFFS_CHUNK_SIZE_SHIFT;
1338 sb->s_blocksize = PAGE_CACHE_SIZE;
1339 sb->s_blocksize_bits = PAGE_CACHE_SHIFT;
1341 T(YAFFS_TRACE_OS,("yaffs_read_super: Using yaffs%d\n",yaffsVersion));
1342 T(YAFFS_TRACE_OS,("yaffs_read_super: %s block size %d\n", useRam ? "RAM" : "MTD",(int)(sb->s_blocksize)));
1344 #ifdef CONFIG_YAFFS_DISABLE_WRITE_VERIFY
1345 T(YAFFS_TRACE_OS,("yaffs: Write verification disabled. All guarantees null and void\n"));
1353 #ifdef CONFIG_YAFFS_RAM_ENABLED
1354 // Set the yaffs_Device up for ram emulation
1357 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2,5,0))
1358 sb->s_fs_info = dev = kmalloc(sizeof(yaffs_Device),GFP_KERNEL);
1360 sb->u.generic_sbp = dev = kmalloc(sizeof(yaffs_Device),GFP_KERNEL);
1365 // Deep shit could not allocate device structure
1366 T(YAFFS_TRACE_OS,("yaffs_read_super: Failed trying to allocate yaffs_Device.\n"));
1370 memset(dev,0,sizeof(yaffs_Device));
1371 dev->genericDevice = NULL; // Not used for RAM emulation.
1372 dev->name = sb->s_type->name;
1374 nBlocks = YAFFS_RAM_EMULATION_SIZE / (YAFFS_CHUNKS_PER_BLOCK * YAFFS_BYTES_PER_CHUNK);
1375 dev->startBlock = 0;
1376 dev->endBlock = nBlocks - 1;
1377 dev->nChunksPerBlock = YAFFS_CHUNKS_PER_BLOCK;
1378 dev->nBytesPerChunk = YAFFS_BYTES_PER_CHUNK;
1379 dev->nReservedBlocks = 5;
1381 if(yaffsVersion == 2)
1383 dev->writeChunkWithTagsToNAND = nandemul2k_WriteChunkWithTagsToNAND;
1384 dev->readChunkWithTagsFromNAND = nandemul2k_ReadChunkWithTagsFromNAND;
1385 dev->markNANDBlockBad = nandemul2k_MarkNANDBlockBad;
1386 dev->queryNANDBlock = nandemul2k_QueryNANDBlock;
1387 dev->eraseBlockInNAND = nandemul2k_EraseBlockInNAND;
1388 dev->initialiseNAND = nandemul2k_InitialiseNAND;
1390 dev->nChunksPerBlock = nandemul2k_GetChunksPerBlock();
1391 dev->nBytesPerChunk = nandemul2k_GetBytesPerChunk();;
1392 nBlocks = nandemul2k_GetNumberOfBlocks();
1393 dev->startBlock = 0;
1394 dev->endBlock = nBlocks - 1;
1398 dev->writeChunkToNAND = nandemul_WriteChunkToNAND;
1399 dev->readChunkFromNAND = nandemul_ReadChunkFromNAND;
1400 dev->eraseBlockInNAND = nandemul_EraseBlockInNAND;
1401 dev->initialiseNAND = nandemul_InitialiseNAND;
1409 #if defined(CONFIG_YAFFS_MTD_ENABLED) || defined(CONFIG_YAFFS2_MTD_ENABLED)
1410 struct mtd_info *mtd;
1412 T(YAFFS_TRACE_ALWAYS,("yaffs: Attempting MTD mount on %u.%u, \"%s\"\n",
1413 MAJOR(sb->s_dev),MINOR(sb->s_dev), yaffs_devname(sb, devname_buf)));
1415 // Check it's an mtd device.....
1416 if(MAJOR(sb->s_dev) != MTD_BLOCK_MAJOR)
1418 return NULL; // This isn't an mtd device
1422 mtd = get_mtd_device(NULL, MINOR(sb->s_dev));
1425 T(YAFFS_TRACE_ALWAYS,("yaffs: MTD device #%u doesn't appear to exist\n", MINOR(sb->s_dev)));
1430 if(mtd->type != MTD_NANDFLASH)
1432 T(YAFFS_TRACE_ALWAYS,("yaffs: MTD device is not NAND it's type %d\n", mtd->type));
1436 T(YAFFS_TRACE_OS,(" erase %p\n",mtd->erase));
1437 T(YAFFS_TRACE_OS,(" read %p\n",mtd->read));
1438 T(YAFFS_TRACE_OS,(" write %p\n",mtd->write));
1439 T(YAFFS_TRACE_OS,(" readoob %p\n",mtd->read_oob));
1440 T(YAFFS_TRACE_OS,(" writeoob %p\n",mtd->write_oob));
1441 T(YAFFS_TRACE_OS,(" block_isbad %p\n",mtd->block_isbad));
1442 T(YAFFS_TRACE_OS,(" block_markbad %p\n",mtd->block_markbad));
1443 T(YAFFS_TRACE_OS,(" oobblock %d\n",mtd->oobblock));
1444 T(YAFFS_TRACE_OS,(" oobsize %d\n",mtd->oobsize));
1445 T(YAFFS_TRACE_OS,(" erasesize %d\n",mtd->erasesize));
1446 T(YAFFS_TRACE_OS,(" size %d\n",mtd->size));
1448 if(yaffsVersion == 2)
1450 // Check for version 2 style functions
1452 !mtd->block_isbad ||
1453 !mtd->block_markbad ||
1456 #ifndef CONFIG_YAFFS_USE_OLD_MTD
1463 T(YAFFS_TRACE_ALWAYS,("yaffs: MTD device does not support required functions\n"));;
1467 if(mtd->oobblock < YAFFS_MIN_YAFFS2_CHUNK_SIZE ||
1468 mtd->oobsize < YAFFS_MIN_YAFFS2_SPARE_SIZE)
1470 T(YAFFS_TRACE_ALWAYS,("yaffs: MTD device does not support have the right page sizes\n"));
1475 // Check for V1 style functions
1479 #ifndef CONFIG_YAFFS_USE_OLD_MTD
1486 T(YAFFS_TRACE_ALWAYS,("yaffs: MTD device does not support required functions\n"));;
1490 if(mtd->oobblock != YAFFS_BYTES_PER_CHUNK ||
1491 mtd->oobsize != YAFFS_BYTES_PER_SPARE)
1493 T(YAFFS_TRACE_ALWAYS,("yaffs: MTD device does not support have the right page sizes\n"));
1499 // OK, so if we got here, we have an MTD that's NAND and looks
1500 // like it has the right capabilities
1501 // Set the yaffs_Device up for mtd
1503 //#if defined(CONFIG_KERNEL_2_5)
1504 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2,5,0))
1505 sb->s_fs_info = dev = kmalloc(sizeof(yaffs_Device),GFP_KERNEL);
1507 sb->u.generic_sbp = dev = kmalloc(sizeof(yaffs_Device),GFP_KERNEL);
1511 // Deep shit could not allocate device structure
1512 T(YAFFS_TRACE_ALWAYS,("yaffs_read_super: Failed trying to allocate yaffs_Device. \n"));
1516 memset(dev,0,sizeof(yaffs_Device));
1517 dev->genericDevice = mtd;
1518 dev->name = mtd->name;
1520 // Set up the memory size parameters....
1522 nBlocks = mtd->size / (YAFFS_CHUNKS_PER_BLOCK * YAFFS_BYTES_PER_CHUNK);
1523 dev->startBlock = 0;
1524 dev->endBlock = nBlocks - 1;
1525 dev->nChunksPerBlock = YAFFS_CHUNKS_PER_BLOCK;
1526 dev->nBytesPerChunk = YAFFS_BYTES_PER_CHUNK;
1527 dev->nReservedBlocks = 5;
1528 dev->nShortOpCaches = 10; // Enable short op caching
1531 // ... and the functions.
1532 if(yaffsVersion == 2)
1534 dev->writeChunkWithTagsToNAND = nandmtd2_WriteChunkWithTagsToNAND;
1535 dev->readChunkWithTagsFromNAND = nandmtd2_ReadChunkWithTagsFromNAND;
1536 dev->markNANDBlockBad = nandmtd2_MarkNANDBlockBad;
1537 dev->queryNANDBlock = nandmtd2_QueryNANDBlock;
1538 dev->spareBuffer = YMALLOC(mtd->oobsize);
1540 dev->nBytesPerChunk = mtd->oobblock;
1541 dev->nChunksPerBlock = mtd->erasesize / mtd->oobblock;
1542 nBlocks = mtd->size / mtd->erasesize;
1543 dev->startBlock = 0;
1544 dev->endBlock = nBlocks - 1;
1548 dev->writeChunkToNAND = nandmtd_WriteChunkToNAND;
1549 dev->readChunkFromNAND = nandmtd_ReadChunkFromNAND;
1552 // ... and common functions
1553 dev->eraseBlockInNAND = nandmtd_EraseBlockInNAND;
1554 dev->initialiseNAND = nandmtd_InitialiseNAND;
1556 dev->putSuperFunc = yaffs_MTDPutSuper;
1558 #ifdef CONFIG_YAFFS_USE_NANDECC
1559 dev->useNANDECC = 1;
1564 /* we assume this is protected by lock_kernel() in mount/umount */
1565 list_add_tail(&dev->devList, &yaffs_dev_list);
1567 init_MUTEX(&dev->grossLock);
1570 yaffs_GrossLock(dev);
1572 err = yaffs_GutsInitialise(dev);
1574 T(YAFFS_TRACE_OS,("yaffs_read_super: guts initialised %s\n", (err == YAFFS_OK) ? "OK" : "FAILED"));
1576 // Create root inode
1578 inode = yaffs_get_inode(sb, S_IFDIR | 0755, 0,yaffs_Root(dev));
1580 yaffs_GrossUnlock(dev);
1586 inode->i_op = & yaffs_dir_inode_operations;
1587 inode->i_fop = & yaffs_dir_operations;
1589 T(YAFFS_TRACE_OS,("yaffs_read_super: got root inode\n"));
1592 root = d_alloc_root(inode);
1594 T(YAFFS_TRACE_OS,("yaffs_read_super: d_alloc_root done\n"));
1602 T(YAFFS_TRACE_OS,("yaffs_read_super: done\n"));
1608 #ifdef CONFIG_YAFFS_MTD_ENABLED
1610 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2,5,0))
1611 static int yaffs_internal_read_super_mtd(struct super_block * sb, void * data, int silent)
1613 return yaffs_internal_read_super(1,0,sb,data,silent) ? 0 : -1;
1616 static struct super_block *yaffs_read_super(struct file_system_type * fs, int flags, const char *dev_name, void *data)
1619 return get_sb_bdev(fs, flags, dev_name, data, yaffs_internal_read_super_mtd);
1622 /* changes NCB 2.5.70 */
1623 //static DECLARE_FSTYPE(yaffs_fs_type, "yaffs", yaffs_read_super, FS_REQUIRES_DEV);
1624 static struct file_system_type yaffs_fs_type = {
1625 .owner = THIS_MODULE,
1627 .get_sb = yaffs_read_super,
1628 .kill_sb = kill_block_super,
1629 // .kill_sb = kill_litter_super,
1630 .fs_flags = FS_REQUIRES_DEV,
1633 static struct super_block *yaffs_read_super(struct super_block * sb, void * data, int silent)
1635 return yaffs_internal_read_super(1,0,sb,data,silent);
1638 static DECLARE_FSTYPE(yaffs_fs_type, "yaffs", yaffs_read_super, FS_REQUIRES_DEV);
1641 #endif // CONFIG_YAFFS_MTD_ENABLED
1643 #ifdef CONFIG_YAFFS2_MTD_ENABLED
1645 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2,5,0))
1646 static int yaffs2_internal_read_super_mtd(struct super_block * sb, void * data, int silent)
1648 return yaffs_internal_read_super(2,0,sb,data,silent) ? 0 : -1;
1651 static struct super_block *yaffs2_read_super(struct file_system_type * fs, int flags, const char *dev_name, void *data)
1654 return get_sb_bdev(fs, flags, dev_name, data, yaffs2_internal_read_super_mtd);
1657 /* changes NCB 2.5.70 */
1658 //static DECLARE_FSTYPE(yaffs_fs_type, "yaffs", yaffs_read_super, FS_REQUIRES_DEV);
1659 static struct file_system_type yaffs2_fs_type = {
1660 .owner = THIS_MODULE,
1662 .get_sb = yaffs2_read_super,
1663 .kill_sb = kill_block_super,
1664 // .kill_sb = kill_litter_super,
1665 .fs_flags = FS_REQUIRES_DEV,
1668 static struct super_block *yaffs2_read_super(struct super_block * sb, void * data, int silent)
1670 return yaffs_internal_read_super(2,0,sb,data,silent);
1673 static DECLARE_FSTYPE(yaffs2_fs_type, "yaffs2", yaffs2_read_super, FS_REQUIRES_DEV);
1676 #endif // CONFIG_YAFFS2_MTD_ENABLED
1679 #ifdef CONFIG_YAFFS_RAM_ENABLED
1681 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2,5,0))
1682 static int yaffs_internal_read_super_ram(struct super_block * sb, void * data, int silent)
1684 return yaffs_internal_read_super(1,1,sb,data,silent) ? 0 : -1;
1687 static struct super_block *yaffs_ram_read_super(struct file_system_type * fs, int flags, const char *dev_name, void *data)
1690 return get_sb_nodev(fs, flags, data, yaffs_internal_read_super_ram);
1694 static struct file_system_type yaffs_ram_fs_type = {
1695 .owner = THIS_MODULE,
1697 .get_sb = yaffs_ram_read_super,
1698 .kill_sb = kill_litter_super,
1702 static struct super_block *yaffs_ram_read_super(struct super_block * sb, void * data, int silent)
1704 return yaffs_internal_read_super(1,1,sb,data,silent);
1707 static DECLARE_FSTYPE(yaffs_ram_fs_type, "yaffsram", yaffs_ram_read_super, FS_SINGLE);
1710 #endif // CONFIG_YAFFS_RAM_ENABLED
1712 #ifdef CONFIG_YAFFS2_RAM_ENABLED
1714 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2,5,0))
1715 static int yaffs2_internal_read_super_ram(struct super_block * sb, void * data, int silent)
1717 return yaffs_internal_read_super(2,1,sb,data,silent) ? 0 : -1;
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");