X-Git-Url: http://www.aleph1.co.uk/gitweb/?a=blobdiff_plain;f=yaffs_fs.c;h=5f0c7b29f73cef858d7bb0a8e1ad6065a178b9c2;hb=18fcce7fefa7e3d67ac8a7455056395567564617;hp=eceb34f3c0e23bd1f771d690255bdae2801497a2;hpb=a4d9ea92251deb3c1389e3e3443faf4341f817db;p=yaffs2.git

diff --git a/yaffs_fs.c b/yaffs_fs.c
index eceb34f..5f0c7b2 100644
--- a/yaffs_fs.c
+++ b/yaffs_fs.c
@@ -32,7 +32,7 @@
  */
 
 const char *yaffs_fs_c_version =
-    "$Id: yaffs_fs.c,v 1.65 2007-12-13 15:35:17 wookey Exp $";
+    "$Id: yaffs_fs.c,v 1.75 2009-03-05 01:45:28 charles Exp $";
 extern const char *yaffs_guts_c_version;
 
 #include <linux/version.h>
@@ -43,7 +43,6 @@ extern const char *yaffs_guts_c_version;
 #include <linux/module.h>
 #include <linux/slab.h>
 #include <linux/init.h>
-#include <linux/list.h>
 #include <linux/fs.h>
 #include <linux/proc_fs.h>
 #include <linux/smp_lock.h>
@@ -53,6 +52,8 @@ extern const char *yaffs_guts_c_version;
 #include <linux/string.h>
 #include <linux/ctype.h>
 
+#include "asm/div64.h"
+
 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2,5,0))
 
 #include <linux/statfs.h>	/* Added NCB 15-8-2003 */
@@ -76,6 +77,12 @@ extern const char *yaffs_guts_c_version;
 
 #endif
 
+#if (LINUX_VERSION_CODE < KERNEL_VERSION(2,6,26))
+#define YPROC_ROOT  &proc_root
+#else
+#define YPROC_ROOT  NULL
+#endif
+
 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2,6,17))
 #define WRITE_SIZE_STR "writesize"
 #define WRITE_SIZE(mtd) (mtd)->writesize
@@ -84,6 +91,23 @@ extern const char *yaffs_guts_c_version;
 #define WRITE_SIZE(mtd) (mtd)->oobblock
 #endif
 
+#if(LINUX_VERSION_CODE > KERNEL_VERSION(2,6,27))
+#define YAFFS_USE_WRITE_BEGIN_END 1
+#else
+#define YAFFS_USE_WRITE_BEGIN_END 0
+#endif
+
+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2,6,28))
+static uint32_t YCALCBLOCKS(uint64_t partition_size, uint32_t block_size)
+{
+	uint64_t result = partition_size;
+	do_div(result,block_size);
+	return (uint32_t)result;
+}
+#else
+#define YCALCBLOCKS(s,b) ((s)/(b))
+#endif
+
 #include <asm/uaccess.h>
 
 #include "yportenv.h"
@@ -96,14 +120,30 @@ extern const char *yaffs_guts_c_version;
 
 unsigned int yaffs_traceMask = YAFFS_TRACE_BAD_BLOCKS;
 unsigned int yaffs_wr_attempts = YAFFS_WR_ATTEMPTS;
+unsigned int yaffs_auto_checkpoint = 1;
 
 /* Module Parameters */
 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2,5,0))
 module_param(yaffs_traceMask,uint,0644);
 module_param(yaffs_wr_attempts,uint,0644);
+module_param(yaffs_auto_checkpoint,uint,0644);
 #else
 MODULE_PARM(yaffs_traceMask,"i");
 MODULE_PARM(yaffs_wr_attempts,"i");
+MODULE_PARM(yaffs_auto_checkpoint,"i");
+#endif
+
+#if (LINUX_VERSION_CODE < KERNEL_VERSION(2,6,25))
+/* use iget and read_inode */
+#define Y_IGET(sb,inum) iget((sb),(inum))
+static void yaffs_read_inode(struct inode *inode);
+
+#else
+/* Call local equivalent */
+#define YAFFS_USE_OWN_IGET
+#define Y_IGET(sb,inum) yaffs_iget((sb),(inum))
+
+static struct inode * yaffs_iget(struct super_block *sb, unsigned long ino);
 #endif
 
 /*#define T(x) printk x */
@@ -127,6 +167,8 @@ static void yaffs_put_super(struct super_block *sb);
 
 static ssize_t yaffs_file_write(struct file *f, const char *buf, size_t n,
 				loff_t * pos);
+static ssize_t yaffs_hold_space(struct file *f);
+static void yaffs_release_space(struct file *f);
 
 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2,6,17))
 static int yaffs_file_flush(struct file *file, fl_owner_t id);
@@ -181,9 +223,11 @@ static int yaffs_statfs(struct super_block *sb, struct kstatfs *buf);
 #else
 static int yaffs_statfs(struct super_block *sb, struct statfs *buf);
 #endif
-static void yaffs_read_inode(struct inode *inode);
 
+#ifdef YAFFS_HAS_PUT_INODE
 static void yaffs_put_inode(struct inode *inode);
+#endif
+
 static void yaffs_delete_inode(struct inode *);
 static void yaffs_clear_inode(struct inode *);
 
@@ -193,10 +237,22 @@ static int yaffs_writepage(struct page *page, struct writeback_control *wbc);
 #else
 static int yaffs_writepage(struct page *page);
 #endif
+
+
+#if (YAFFS_USE_WRITE_BEGIN_END != 0)
+static int yaffs_write_begin(struct file *filp, struct address_space *mapping,
+                             loff_t pos, unsigned len, unsigned flags,
+                          struct page **pagep, void **fsdata);
+static int yaffs_write_end(struct file *filp, struct address_space *mapping,
+			   loff_t pos, unsigned len, unsigned copied,
+			   struct page *pg, void *fsdadata);
+#else
 static int yaffs_prepare_write(struct file *f, struct page *pg,
 			       unsigned offset, unsigned to);
 static int yaffs_commit_write(struct file *f, struct page *pg, unsigned offset,
 			      unsigned to);
+                                                                                                
+#endif
 
 static int yaffs_readlink(struct dentry *dentry, char __user * buffer,
 			  int buflen);
@@ -209,8 +265,13 @@ static int yaffs_follow_link(struct dentry *dentry, struct nameidata *nd);
 static struct address_space_operations yaffs_file_address_operations = {
 	.readpage = yaffs_readpage,
 	.writepage = yaffs_writepage,
+#if (YAFFS_USE_WRITE_BEGIN_END > 0)
+	.write_begin = yaffs_write_begin,
+	.write_end = yaffs_write_end,
+#else
 	.prepare_write = yaffs_prepare_write,
 	.commit_write = yaffs_commit_write,
+#endif
 };
 
 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2,6,22))
@@ -224,6 +285,7 @@ static struct file_operations yaffs_file_operations = {
 	.fsync = yaffs_sync_object,
 	.splice_read = generic_file_splice_read,
 	.splice_write = generic_file_splice_write,
+	.llseek = generic_file_llseek,
 };
 
 #elif (LINUX_VERSION_CODE > KERNEL_VERSION(2,6,18))
@@ -284,8 +346,13 @@ static struct file_operations yaffs_dir_operations = {
 
 static struct super_operations yaffs_super_ops = {
 	.statfs = yaffs_statfs,
+
+#ifndef YAFFS_USE_OWN_IGET
 	.read_inode = yaffs_read_inode,
+#endif
+#ifdef YAFFS_HAS_PUT_INODE
 	.put_inode = yaffs_put_inode,
+#endif
 	.put_super = yaffs_put_super,
 	.delete_inode = yaffs_delete_inode,
 	.clear_inode = yaffs_clear_inode,
@@ -295,14 +362,16 @@ static struct super_operations yaffs_super_ops = {
 
 static void yaffs_GrossLock(yaffs_Device * dev)
 {
-	T(YAFFS_TRACE_OS, (KERN_DEBUG "yaffs locking\n"));
+	T(YAFFS_TRACE_OS, ( "yaffs locking %p\n",current));
 
 	down(&dev->grossLock);
+        T(YAFFS_TRACE_OS, ( "yaffs locked %p\n",current));
+	
 }
 
 static void yaffs_GrossUnlock(yaffs_Device * dev)
 {
-	T(YAFFS_TRACE_OS, (KERN_DEBUG "yaffs unlocking\n"));
+	T(YAFFS_TRACE_OS, ( "yaffs unlocking %p\n",current));
 	up(&dev->grossLock);
 
 }
@@ -383,7 +452,7 @@ static struct dentry *yaffs_lookup(struct inode *dir, struct dentry *dentry)
 	yaffs_GrossLock(dev);
 
 	T(YAFFS_TRACE_OS,
-	  (KERN_DEBUG "yaffs_lookup for %d:%s\n",
+	  ( "yaffs_lookup for %d:%s\n",
 	   yaffs_InodeToObject(dir)->objectId, dentry->d_name.name));
 
 	obj =
@@ -397,13 +466,13 @@ static struct dentry *yaffs_lookup(struct inode *dir, struct dentry *dentry)
 
 	if (obj) {
 		T(YAFFS_TRACE_OS,
-		  (KERN_DEBUG "yaffs_lookup found %d\n", obj->objectId));
+		  ( "yaffs_lookup found %d\n", obj->objectId));
 
 		inode = yaffs_get_inode(dir->i_sb, obj->yst_mode, 0, obj);
 
 		if (inode) {
 			T(YAFFS_TRACE_OS,
-			  (KERN_DEBUG "yaffs_loookup dentry \n"));
+			  ( "yaffs_loookup dentry \n"));
 /* #if 0 asserted by NCB for 2.5/6 compatability - falls through to
  * d_add even if NULL inode */
 #if 0
@@ -416,7 +485,7 @@ static struct dentry *yaffs_lookup(struct inode *dir, struct dentry *dentry)
 		}
 
 	} else {
-		T(YAFFS_TRACE_OS, (KERN_DEBUG "yaffs_lookup not found\n"));
+		T(YAFFS_TRACE_OS, ( "yaffs_lookup not found\n"));
 
 	}
 
@@ -429,6 +498,9 @@ static struct dentry *yaffs_lookup(struct inode *dir, struct dentry *dentry)
 
 }
 
+
+#ifdef YAFFS_HAS_PUT_INODE
+
 /* For now put inode is just for debugging
  * Put inode is called when the inode **structure** is put.
  */
@@ -439,6 +511,7 @@ static void yaffs_put_inode(struct inode *inode)
 	   atomic_read(&inode->i_count)));
 
 }
+#endif
 
 /* clear is called to tell the fs to release any per-inode data it holds */
 static void yaffs_clear_inode(struct inode *inode)
@@ -493,7 +566,7 @@ static void yaffs_delete_inode(struct inode *inode)
 	if (obj) {
 		dev = obj->myDev;
 		yaffs_GrossLock(dev);
-		yaffs_DeleteFile(obj);
+		yaffs_DeleteObject(obj);
 		yaffs_GrossUnlock(dev);
 	}
 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2,6,13))
@@ -513,7 +586,7 @@ static int yaffs_file_flush(struct file *file)
 	yaffs_Device *dev = obj->myDev;
 
 	T(YAFFS_TRACE_OS,
-	  (KERN_DEBUG "yaffs_file_flush object %d (%s)\n", obj->objectId,
+	  ( "yaffs_file_flush object %d (%s)\n", obj->objectId,
 	   obj->dirty ? "dirty" : "clean"));
 
 	yaffs_GrossLock(dev);
@@ -535,7 +608,7 @@ static int yaffs_readpage_nolock(struct file *f, struct page *pg)
 
 	yaffs_Device *dev;
 
-	T(YAFFS_TRACE_OS, (KERN_DEBUG "yaffs_readpage at %08x, size %08x\n",
+	T(YAFFS_TRACE_OS, ( "yaffs_readpage at %08x, size %08x\n",
 			   (unsigned)(pg->index << PAGE_CACHE_SHIFT),
 			   (unsigned)PAGE_CACHE_SIZE));
 
@@ -575,7 +648,7 @@ static int yaffs_readpage_nolock(struct file *f, struct page *pg)
 	flush_dcache_page(pg);
 	kunmap(pg);
 
-	T(YAFFS_TRACE_OS, (KERN_DEBUG "yaffs_readpage done\n"));
+	T(YAFFS_TRACE_OS, ( "yaffs_readpage done\n"));
 	return ret;
 }
 
@@ -616,12 +689,12 @@ static int yaffs_writepage(struct page *page)
 
 	if (offset > inode->i_size) {
 		T(YAFFS_TRACE_OS,
-		  (KERN_DEBUG
+		  (
 		   "yaffs_writepage at %08x, inode size = %08x!!!\n",
 		   (unsigned)(page->index << PAGE_CACHE_SHIFT),
 		   (unsigned)inode->i_size));
 		T(YAFFS_TRACE_OS,
-		  (KERN_DEBUG "                -> don't care!!\n"));
+		  ( "                -> don't care!!\n"));
 		unlock_page(page);
 		return 0;
 	}
@@ -643,10 +716,10 @@ static int yaffs_writepage(struct page *page)
 	yaffs_GrossLock(obj->myDev);
 
 	T(YAFFS_TRACE_OS,
-	  (KERN_DEBUG "yaffs_writepage at %08x, size %08x\n",
+	  ( "yaffs_writepage at %08x, size %08x\n",
 	   (unsigned)(page->index << PAGE_CACHE_SHIFT), nBytes));
 	T(YAFFS_TRACE_OS,
-	  (KERN_DEBUG "writepag0: obj = %05x, ino = %05x\n",
+	  ( "writepag0: obj = %05x, ino = %05x\n",
 	   (int)obj->variant.fileVariant.fileSize, (int)inode->i_size));
 
 	nWritten =
@@ -654,7 +727,7 @@ static int yaffs_writepage(struct page *page)
 				  nBytes, 0);
 
 	T(YAFFS_TRACE_OS,
-	  (KERN_DEBUG "writepag1: obj = %05x, ino = %05x\n",
+	  ( "writepag1: obj = %05x, ino = %05x\n",
 	   (int)obj->variant.fileVariant.fileSize, (int)inode->i_size));
 
 	yaffs_GrossUnlock(obj->myDev);
@@ -667,39 +740,148 @@ static int yaffs_writepage(struct page *page)
 	return (nWritten == nBytes) ? 0 : -ENOSPC;
 }
 
+
+#if (YAFFS_USE_WRITE_BEGIN_END > 0)
+static int yaffs_write_begin(struct file *filp, struct address_space *mapping,
+                             loff_t pos, unsigned len, unsigned flags,
+                          struct page **pagep, void **fsdata)
+
+{
+	struct page *pg = NULL;
+        pgoff_t index = pos >> PAGE_CACHE_SHIFT;
+        uint32_t offset = pos & (PAGE_CACHE_SIZE - 1);
+        uint32_t to = offset + len;
+        
+        int ret = 0;
+        int space_held = 0;
+        
+	T(YAFFS_TRACE_OS, ( "start yaffs_write_begin\n"));
+	/* Get a page */
+#if LINUX_VERSION_CODE > KERNEL_VERSION(2,6,28)
+	pg = grab_cache_page_write_begin(mapping,index,flags);
+#else
+	pg = __grab_cache_page(mapping,index);
+#endif
+
+	*pagep = pg;	
+	if(!pg){
+		ret =  -ENOMEM;
+		goto out;
+	}
+	/* Get fs space */
+	space_held = yaffs_hold_space(filp);
+	
+	if(!space_held){
+		ret = -ENOSPC;
+		goto out;
+	}
+		
+	/* Update page if required */
+	
+	if (!Page_Uptodate(pg) && (offset || to < PAGE_CACHE_SIZE))
+		ret = yaffs_readpage_nolock(filp, pg);
+	
+	if(ret)
+		goto out;
+
+	/* Happy path return */
+	T(YAFFS_TRACE_OS, ( "end yaffs_write_begin - ok\n"));
+		
+	return 0;
+		
+out:
+	T(YAFFS_TRACE_OS, ( "end yaffs_write_begin fail returning %d\n",ret));
+	if(space_held){
+		yaffs_release_space(filp);
+	}
+	if(pg) {
+		unlock_page(pg);
+		page_cache_release(pg);
+	}
+	return ret;
+}
+
+#else
+
 static int yaffs_prepare_write(struct file *f, struct page *pg,
 			       unsigned offset, unsigned to)
 {
 
-	T(YAFFS_TRACE_OS, (KERN_DEBUG "yaffs_prepair_write\n"));
+	T(YAFFS_TRACE_OS, ( "yaffs_prepair_write\n"));
 	if (!Page_Uptodate(pg) && (offset || to < PAGE_CACHE_SIZE))
 		return yaffs_readpage_nolock(f, pg);
-
 	return 0;
 
 }
+#endif
+
+#if (YAFFS_USE_WRITE_BEGIN_END > 0)
+static int yaffs_write_end(struct file *filp, struct address_space *mapping,
+			   loff_t pos, unsigned len, unsigned copied,
+			   struct page *pg, void *fsdadata)
+{
+	int ret = 0;
+	void *addr, *kva;
+        uint32_t offset_into_page = pos & (PAGE_CACHE_SIZE -1); 
+
+
+	
+	kva=kmap(pg);
+	addr = kva + offset_into_page;
+
+	T(YAFFS_TRACE_OS,
+	  ( "yaffs_write_end addr %x pos %x nBytes %d\n", (unsigned) addr,
+	   (int)pos, copied));
+
+	ret = yaffs_file_write(filp, addr, copied, &pos);
+
+	if (ret != copied) {
+		T(YAFFS_TRACE_OS,
+		  (
+		   "yaffs_write_end not same size ret %d  copied %d\n",
+		   ret, copied ));
+		SetPageError(pg);
+		ClearPageUptodate(pg);
+	} else {
+		SetPageUptodate(pg);
+	}
+
+	kunmap(pg);
+
+	yaffs_release_space(filp);
+	unlock_page(pg);
+	page_cache_release(pg);
+	return ret;
+}
+#else
 
 static int yaffs_commit_write(struct file *f, struct page *pg, unsigned offset,
 			      unsigned to)
 {
 
-	void *addr = page_address(pg) + offset;
+	void *addr, *kva;
+	
 	loff_t pos = (((loff_t) pg->index) << PAGE_CACHE_SHIFT) + offset;
 	int nBytes = to - offset;
 	int nWritten;
 
 	unsigned spos = pos;
-	unsigned saddr = (unsigned)addr;
+	unsigned saddr;
+	
+	kva=kmap(pg);
+	addr = kva + offset;
+
+	saddr = (unsigned) addr;
 
 	T(YAFFS_TRACE_OS,
-	  (KERN_DEBUG "yaffs_commit_write addr %x pos %x nBytes %d\n", saddr,
+	  ( "yaffs_commit_write addr %x pos %x nBytes %d\n", saddr,
 	   spos, nBytes));
 
 	nWritten = yaffs_file_write(f, addr, nBytes, &pos);
 
 	if (nWritten != nBytes) {
 		T(YAFFS_TRACE_OS,
-		  (KERN_DEBUG
+		  (
 		   "yaffs_commit_write not same size nWritten %d  nBytes %d\n",
 		   nWritten, nBytes));
 		SetPageError(pg);
@@ -708,13 +890,17 @@ static int yaffs_commit_write(struct file *f, struct page *pg, unsigned offset,
 		SetPageUptodate(pg);
 	}
 
+	kunmap(pg);
+
 	T(YAFFS_TRACE_OS,
-	  (KERN_DEBUG "yaffs_commit_write returning %d\n",
+	  ( "yaffs_commit_write returning %d\n",
 	   nWritten == nBytes ? 0 : nWritten));
 
 	return nWritten == nBytes ? 0 : nWritten;
 
 }
+#endif
+
 
 static void yaffs_FillInodeFromObject(struct inode *inode, yaffs_Object * obj)
 {
@@ -753,6 +939,8 @@ static void yaffs_FillInodeFromObject(struct inode *inode, yaffs_Object * obj)
  		        break;
  		}
 
+ 		inode->i_flags |= S_NOATIME;
+ 		
 		inode->i_ino = obj->objectId;
 		inode->i_mode = obj->yst_mode;
 		inode->i_uid = obj->yst_uid;
@@ -781,7 +969,7 @@ static void yaffs_FillInodeFromObject(struct inode *inode, yaffs_Object * obj)
 		inode->i_nlink = yaffs_GetObjectLinkCount(obj);
 
 		T(YAFFS_TRACE_OS,
-		  (KERN_DEBUG
+		  (
 		   "yaffs_FillInode mode %x uid %d gid %d size %d count %d\n",
 		   inode->i_mode, inode->i_uid, inode->i_gid,
 		   (int)inode->i_size, atomic_read(&inode->i_count)));
@@ -817,7 +1005,7 @@ static void yaffs_FillInodeFromObject(struct inode *inode, yaffs_Object * obj)
 
 	} else {
 		T(YAFFS_TRACE_OS,
-		  (KERN_DEBUG "yaffs_FileInode invalid parameters\n"));
+		  ( "yaffs_FileInode invalid parameters\n"));
 	}
 
 }
@@ -829,22 +1017,24 @@ struct inode *yaffs_get_inode(struct super_block *sb, int mode, int dev,
 
 	if (!sb) {
 		T(YAFFS_TRACE_OS,
-		  (KERN_DEBUG "yaffs_get_inode for NULL super_block!!\n"));
+		  ( "yaffs_get_inode for NULL super_block!!\n"));
 		return NULL;
 
 	}
 
 	if (!obj) {
 		T(YAFFS_TRACE_OS,
-		  (KERN_DEBUG "yaffs_get_inode for NULL object!!\n"));
+		  ( "yaffs_get_inode for NULL object!!\n"));
 		return NULL;
 
 	}
 
 	T(YAFFS_TRACE_OS,
-	  (KERN_DEBUG "yaffs_get_inode for object %d\n", obj->objectId));
+	  ( "yaffs_get_inode for object %d\n", obj->objectId));
 
-	inode = iget(sb, obj->objectId);
+	inode = Y_IGET(sb, obj->objectId);
+	if(IS_ERR(inode))
+	  return NULL;
 
 	/* NB Side effect: iget calls back to yaffs_read_inode(). */
 	/* iget also increments the inode's i_count */
@@ -877,11 +1067,11 @@ static ssize_t yaffs_file_write(struct file *f, const char *buf, size_t n,
 
 	if (!obj) {
 		T(YAFFS_TRACE_OS,
-		  (KERN_DEBUG "yaffs_file_write: hey obj is null!\n"));
+		  ( "yaffs_file_write: hey obj is null!\n"));
 	} else {
 		T(YAFFS_TRACE_OS,
-		  (KERN_DEBUG
-		   "yaffs_file_write about to write writing %d bytes"
+		  (
+		   "yaffs_file_write about to write writing %zu bytes"
 		   "to object %d at %d\n",
 		   n, obj->objectId, ipos));
 	}
@@ -889,7 +1079,7 @@ static ssize_t yaffs_file_write(struct file *f, const char *buf, size_t n,
 	nWritten = yaffs_WriteDataToFile(obj, buf, ipos, n, 0);
 
 	T(YAFFS_TRACE_OS,
-	  (KERN_DEBUG "yaffs_file_write writing %d bytes, %d written at %d\n",
+	  ( "yaffs_file_write writing %zu bytes, %d written at %d\n",
 	   n, nWritten, ipos));
 	if (nWritten > 0) {
 		ipos += nWritten;
@@ -899,7 +1089,7 @@ static ssize_t yaffs_file_write(struct file *f, const char *buf, size_t n,
 			inode->i_blocks = (ipos + 511) >> 9;
 
 			T(YAFFS_TRACE_OS,
-			  (KERN_DEBUG
+			  (
 			   "yaffs_file_write size updated to %d bytes, "
 			   "%d blocks\n",
 			   ipos, (int)(inode->i_blocks)));
@@ -910,13 +1100,55 @@ static ssize_t yaffs_file_write(struct file *f, const char *buf, size_t n,
 	return nWritten == 0 ? -ENOSPC : nWritten;
 }
 
+/* Space holding and freeing is done to ensure we have space available for write_begin/end */
+/* For now we just assume few parallel writes and check against a small number. */
+/* Todo: need to do this with a counter to handle parallel reads better */
+
+static ssize_t yaffs_hold_space(struct file *f)
+{
+	yaffs_Object *obj;
+	yaffs_Device *dev;
+	
+	int nFreeChunks;
+
+	
+	obj = yaffs_DentryToObject(f->f_dentry);
+
+	dev = obj->myDev;
+
+	yaffs_GrossLock(dev);
+
+	nFreeChunks = yaffs_GetNumberOfFreeChunks(dev);
+	
+	yaffs_GrossUnlock(dev);
+
+	return (nFreeChunks > 20) ? 1 : 0;
+}
+
+static void yaffs_release_space(struct file *f)
+{
+	yaffs_Object *obj;
+	yaffs_Device *dev;
+	
+	
+	obj = yaffs_DentryToObject(f->f_dentry);
+
+	dev = obj->myDev;
+
+	yaffs_GrossLock(dev);
+
+	
+	yaffs_GrossUnlock(dev);
+
+}
+
 static int yaffs_readdir(struct file *f, void *dirent, filldir_t filldir)
 {
 	yaffs_Object *obj;
 	yaffs_Device *dev;
 	struct inode *inode = f->f_dentry->d_inode;
 	unsigned long offset, curoffs;
-	struct list_head *i;
+	struct ylist_head *i;
 	yaffs_Object *l;
 
 	char name[YAFFS_MAX_NAME_LENGTH + 1];
@@ -932,7 +1164,7 @@ static int yaffs_readdir(struct file *f, void *dirent, filldir_t filldir)
 
 	if (offset == 0) {
 		T(YAFFS_TRACE_OS,
-		  (KERN_DEBUG "yaffs_readdir: entry . ino %d \n",
+		  ( "yaffs_readdir: entry . ino %d \n",
 		   (int)inode->i_ino));
 		if (filldir(dirent, ".", 1, offset, inode->i_ino, DT_DIR)
 		    < 0) {
@@ -943,7 +1175,7 @@ static int yaffs_readdir(struct file *f, void *dirent, filldir_t filldir)
 	}
 	if (offset == 1) {
 		T(YAFFS_TRACE_OS,
-		  (KERN_DEBUG "yaffs_readdir: entry .. ino %d \n",
+		  ( "yaffs_readdir: entry .. ino %d \n",
 		   (int)f->f_dentry->d_parent->d_inode->i_ino));
 		if (filldir
 		    (dirent, "..", 2, offset,
@@ -965,15 +1197,15 @@ static int yaffs_readdir(struct file *f, void *dirent, filldir_t filldir)
 		f->f_version = inode->i_version;
 	}
 
-	list_for_each(i, &obj->variant.directoryVariant.children) {
+	ylist_for_each(i, &obj->variant.directoryVariant.children) {
 		curoffs++;
 		if (curoffs >= offset) {
-			l = list_entry(i, yaffs_Object, siblings);
+			l = ylist_entry(i, yaffs_Object, siblings);
 
 			yaffs_GetObjectName(l, name,
 					    YAFFS_MAX_NAME_LENGTH + 1);
 			T(YAFFS_TRACE_OS,
-			  (KERN_DEBUG "yaffs_readdir: %s inode %d\n", name,
+			  ( "yaffs_readdir: %s inode %d\n", name,
 			   yaffs_GetObjectInode(l)));
 
 			if (filldir(dirent,
@@ -1002,6 +1234,13 @@ static int yaffs_readdir(struct file *f, void *dirent, filldir_t filldir)
 /*
  * File creation. Allocate an inode, and we're done..
  */
+ 
+#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,29)
+#define YCRED(x) x
+#else
+#define YCRED(x) x->cred
+#endif
+
 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2,5,0))
 static int yaffs_mknod(struct inode *dir, struct dentry *dentry, int mode,
 		       dev_t rdev)
@@ -1018,19 +1257,19 @@ static int yaffs_mknod(struct inode *dir, struct dentry *dentry, int mode,
 	yaffs_Object *parent = yaffs_InodeToObject(dir);
 
 	int error = -ENOSPC;
-	uid_t uid = current->fsuid;
-	gid_t gid = (dir->i_mode & S_ISGID) ? dir->i_gid : current->fsgid;
+	uid_t uid = YCRED(current)->fsuid;
+	gid_t gid = (dir->i_mode & S_ISGID) ? dir->i_gid : YCRED(current)->fsgid;
 
 	if((dir->i_mode & S_ISGID) && S_ISDIR(mode))
 		mode |= S_ISGID;
 
 	if (parent) {
 		T(YAFFS_TRACE_OS,
-		  (KERN_DEBUG "yaffs_mknod: parent object %d type %d\n",
+		  ( "yaffs_mknod: parent object %d type %d\n",
 		   parent->objectId, parent->variantType));
 	} else {
 		T(YAFFS_TRACE_OS,
-		  (KERN_DEBUG "yaffs_mknod: could not get parent object\n"));
+		  ( "yaffs_mknod: could not get parent object\n"));
 		return -EPERM;
 	}
 
@@ -1045,7 +1284,7 @@ static int yaffs_mknod(struct inode *dir, struct dentry *dentry, int mode,
 	switch (mode & S_IFMT) {
 	default:
 		/* Special (socket, fifo, device...) */
-		T(YAFFS_TRACE_OS, (KERN_DEBUG
+		T(YAFFS_TRACE_OS, (
 				   "yaffs_mknod: making special\n"));
 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2,5,0))
 		obj =
@@ -1058,20 +1297,20 @@ static int yaffs_mknod(struct inode *dir, struct dentry *dentry, int mode,
 #endif
 		break;
 	case S_IFREG:		/* file          */
-		T(YAFFS_TRACE_OS, (KERN_DEBUG "yaffs_mknod: making file\n"));
+		T(YAFFS_TRACE_OS, ( "yaffs_mknod: making file\n"));
 		obj =
 		    yaffs_MknodFile(parent, dentry->d_name.name, mode, uid,
 				    gid);
 		break;
 	case S_IFDIR:		/* directory */
 		T(YAFFS_TRACE_OS,
-		  (KERN_DEBUG "yaffs_mknod: making directory\n"));
+		  ( "yaffs_mknod: making directory\n"));
 		obj =
 		    yaffs_MknodDirectory(parent, dentry->d_name.name, mode,
 					 uid, gid);
 		break;
 	case S_IFLNK:		/* symlink */
-		T(YAFFS_TRACE_OS, (KERN_DEBUG "yaffs_mknod: making file\n"));
+		T(YAFFS_TRACE_OS, ( "yaffs_mknod: making symlink\n"));
 		obj = NULL;	/* Do we ever get here? */
 		break;
 	}
@@ -1083,12 +1322,12 @@ static int yaffs_mknod(struct inode *dir, struct dentry *dentry, int mode,
 		inode = yaffs_get_inode(dir->i_sb, mode, rdev, obj);
 		d_instantiate(dentry, inode);
 		T(YAFFS_TRACE_OS,
-		  (KERN_DEBUG "yaffs_mknod created object %d count = %d\n",
+		  ( "yaffs_mknod created object %d count = %d\n",
 		   obj->objectId, atomic_read(&inode->i_count)));
 		error = 0;
 	} else {
 		T(YAFFS_TRACE_OS,
-		  (KERN_DEBUG "yaffs_mknod failed making object\n"));
+		  ( "yaffs_mknod failed making object\n"));
 		error = -ENOMEM;
 	}
 
@@ -1098,7 +1337,7 @@ static int yaffs_mknod(struct inode *dir, struct dentry *dentry, int mode,
 static int yaffs_mkdir(struct inode *dir, struct dentry *dentry, int mode)
 {
 	int retVal;
-	T(YAFFS_TRACE_OS, (KERN_DEBUG "yaffs_mkdir\n"));
+	T(YAFFS_TRACE_OS, ( "yaffs_mkdir\n"));
 	retVal = yaffs_mknod(dir, dentry, mode | S_IFDIR, 0);
 #if 0
 	/* attempt to fix dir bug - didn't work */
@@ -1116,7 +1355,7 @@ static int yaffs_create(struct inode *dir, struct dentry *dentry, int mode,
 static int yaffs_create(struct inode *dir, struct dentry *dentry, int mode)
 #endif
 {
-	T(YAFFS_TRACE_OS, (KERN_DEBUG "yaffs_create\n"));
+	T(YAFFS_TRACE_OS, ( "yaffs_create\n"));
 	return yaffs_mknod(dir, dentry, mode | S_IFREG, 0);
 }
 
@@ -1127,7 +1366,7 @@ static int yaffs_unlink(struct inode *dir, struct dentry *dentry)
 	yaffs_Device *dev;
 
 	T(YAFFS_TRACE_OS,
-	  (KERN_DEBUG "yaffs_unlink %d:%s\n", (int)(dir->i_ino),
+	  ( "yaffs_unlink %d:%s\n", (int)(dir->i_ino),
 	   dentry->d_name.name));
 
 	dev = yaffs_InodeToObject(dir)->myDev;
@@ -1158,7 +1397,7 @@ static int yaffs_link(struct dentry *old_dentry, struct inode *dir,
 	yaffs_Object *link = NULL;
 	yaffs_Device *dev;
 
-	T(YAFFS_TRACE_OS, (KERN_DEBUG "yaffs_link\n"));
+	T(YAFFS_TRACE_OS, ( "yaffs_link\n"));
 
 	obj = yaffs_InodeToObject(inode);
 	dev = obj->myDev;
@@ -1177,7 +1416,7 @@ static int yaffs_link(struct dentry *old_dentry, struct inode *dir,
 		d_instantiate(dentry, old_dentry->d_inode);
 		atomic_inc(&old_dentry->d_inode->i_count);
 		T(YAFFS_TRACE_OS,
-		  (KERN_DEBUG "yaffs_link link count %d i_count %d\n",
+		  ( "yaffs_link link count %d i_count %d\n",
 		   old_dentry->d_inode->i_nlink,
 		   atomic_read(&old_dentry->d_inode->i_count)));
 
@@ -1198,10 +1437,10 @@ static int yaffs_symlink(struct inode *dir, struct dentry *dentry,
 {
 	yaffs_Object *obj;
 	yaffs_Device *dev;
-	uid_t uid = current->fsuid;
-	gid_t gid = (dir->i_mode & S_ISGID) ? dir->i_gid : current->fsgid;
+	uid_t uid = YCRED(current)->fsuid;
+	gid_t gid = (dir->i_mode & S_ISGID) ? dir->i_gid : YCRED(current)->fsgid;
 
-	T(YAFFS_TRACE_OS, (KERN_DEBUG "yaffs_symlink\n"));
+	T(YAFFS_TRACE_OS, ( "yaffs_symlink\n"));
 
 	dev = yaffs_InodeToObject(dir)->myDev;
 	yaffs_GrossLock(dev);
@@ -1215,10 +1454,10 @@ static int yaffs_symlink(struct inode *dir, struct dentry *dentry,
 
 		inode = yaffs_get_inode(dir->i_sb, obj->yst_mode, 0, obj);
 		d_instantiate(dentry, inode);
-		T(YAFFS_TRACE_OS, (KERN_DEBUG "symlink created OK\n"));
+		T(YAFFS_TRACE_OS, ( "symlink created OK\n"));
 		return 0;
 	} else {
-		T(YAFFS_TRACE_OS, (KERN_DEBUG "symlink not created\n"));
+		T(YAFFS_TRACE_OS, ( "symlink not created\n"));
 
 	}
 
@@ -1236,7 +1475,7 @@ static int yaffs_sync_object(struct file *file, struct dentry *dentry,
 
 	dev = obj->myDev;
 
-	T(YAFFS_TRACE_OS, (KERN_DEBUG "yaffs_sync_object\n"));
+	T(YAFFS_TRACE_OS, ( "yaffs_sync_object\n"));
 	yaffs_GrossLock(dev);
 	yaffs_FlushFile(obj, 1);
 	yaffs_GrossUnlock(dev);
@@ -1255,7 +1494,7 @@ static int yaffs_rename(struct inode *old_dir, struct dentry *old_dentry,
 	int retVal = YAFFS_FAIL;
 	yaffs_Object *target;
 
-        T(YAFFS_TRACE_OS, (KERN_DEBUG "yaffs_rename\n"));
+        T(YAFFS_TRACE_OS, ( "yaffs_rename\n"));
 	dev = yaffs_InodeToObject(old_dir)->myDev;
 
 	yaffs_GrossLock(dev);
@@ -1269,15 +1508,15 @@ static int yaffs_rename(struct inode *old_dir, struct dentry *old_dentry,
 
 	if (target &&
 	    target->variantType == YAFFS_OBJECT_TYPE_DIRECTORY &&
-	    !list_empty(&target->variant.directoryVariant.children)) {
+	    !ylist_empty(&target->variant.directoryVariant.children)) {
 
-	        T(YAFFS_TRACE_OS, (KERN_DEBUG "target is non-empty dir\n"));
+	        T(YAFFS_TRACE_OS, ( "target is non-empty dir\n"));
 
 		retVal = YAFFS_FAIL;
 	} else {
 
 		/* Now does unlinking internally using shadowing mechanism */
-	        T(YAFFS_TRACE_OS, (KERN_DEBUG "calling yaffs_RenameObject\n"));
+	        T(YAFFS_TRACE_OS, ( "calling yaffs_RenameObject\n"));
 
 		retVal =
 		    yaffs_RenameObject(yaffs_InodeToObject(old_dir),
@@ -1308,7 +1547,7 @@ static int yaffs_setattr(struct dentry *dentry, struct iattr *attr)
 	yaffs_Device *dev;
 
 	T(YAFFS_TRACE_OS,
-	  (KERN_DEBUG "yaffs_setattr of object %d\n",
+	  ( "yaffs_setattr of object %d\n",
 	   yaffs_InodeToObject(inode)->objectId));
 
 	if ((error = inode_change_ok(inode, attr)) == 0) {
@@ -1343,32 +1582,54 @@ static int yaffs_statfs(struct super_block *sb, struct statfs *buf)
 	yaffs_Device *dev = yaffs_SuperToDevice(sb);
 #endif
 
-	T(YAFFS_TRACE_OS, (KERN_DEBUG "yaffs_statfs\n"));
+	T(YAFFS_TRACE_OS, ( "yaffs_statfs\n"));
 
 	yaffs_GrossLock(dev);
 
 	buf->f_type = YAFFS_MAGIC;
 	buf->f_bsize = sb->s_blocksize;
 	buf->f_namelen = 255;
-	if (sb->s_blocksize > dev->nDataBytesPerChunk) {
-
+	
+	if(dev->nDataBytesPerChunk & (dev->nDataBytesPerChunk - 1)){
+		/* Do this if chunk size is not a power of 2 */
+		
+		uint64_t bytesInDev;
+		uint64_t bytesFree;
+
+		bytesInDev = ((uint64_t)((dev->endBlock - dev->startBlock +1))) *
+			     ((uint64_t)(dev->nChunksPerBlock * dev->nDataBytesPerChunk));
+	
+		do_div(bytesInDev,sb->s_blocksize); /* bytesInDev becomes the number of blocks */
+		buf->f_blocks = bytesInDev;
+
+		bytesFree  = ((uint64_t)(yaffs_GetNumberOfFreeChunks(dev))) *
+			     ((uint64_t)(dev->nDataBytesPerChunk));
+	
+		do_div(bytesFree,sb->s_blocksize);
+	
+		buf->f_bfree = bytesFree;
+	
+	} else if (sb->s_blocksize > dev->nDataBytesPerChunk) {
+	
 		buf->f_blocks =
-		    (dev->endBlock - dev->startBlock +
-		     1) * dev->nChunksPerBlock / (sb->s_blocksize /
-						  dev->nDataBytesPerChunk);
-		buf->f_bfree =
-		    yaffs_GetNumberOfFreeChunks(dev) / (sb->s_blocksize /
-							dev->nDataBytesPerChunk);
+	                   (dev->endBlock - dev->startBlock + 1) * 
+	                    dev->nChunksPerBlock / 
+	                    (sb->s_blocksize / dev->nDataBytesPerChunk);
+	        buf->f_bfree =
+	                   yaffs_GetNumberOfFreeChunks(dev) / 
+	                   (sb->s_blocksize / dev->nDataBytesPerChunk);
 	} else {
-
-		buf->f_blocks =
-		    (dev->endBlock - dev->startBlock +
-		     1) * dev->nChunksPerBlock * (dev->nDataBytesPerChunk /
-						  sb->s_blocksize);
-		buf->f_bfree =
-		    yaffs_GetNumberOfFreeChunks(dev) * (dev->nDataBytesPerChunk /
-							sb->s_blocksize);
+	       buf->f_blocks =
+	                   (dev->endBlock - dev->startBlock + 1) * 
+	                   dev->nChunksPerBlock * 
+	                   (dev->nDataBytesPerChunk / sb->s_blocksize);
+	                   
+	               buf->f_bfree =
+	                   yaffs_GetNumberOfFreeChunks(dev) * 
+	                   (dev->nDataBytesPerChunk / sb->s_blocksize);
 	}
+	
+	
 	buf->f_files = 0;
 	buf->f_ffree = 0;
 	buf->f_bavail = buf->f_bfree;
@@ -1378,18 +1639,19 @@ static int yaffs_statfs(struct super_block *sb, struct statfs *buf)
 }
 
 
-/**
 static int yaffs_do_sync_fs(struct super_block *sb)
 {
 
 	yaffs_Device *dev = yaffs_SuperToDevice(sb);
-	T(YAFFS_TRACE_OS, (KERN_DEBUG "yaffs_do_sync_fs\n"));
+	T(YAFFS_TRACE_OS, ( "yaffs_do_sync_fs\n"));
 
 	if(sb->s_dirt) {
 		yaffs_GrossLock(dev);
 
-		if(dev)
+		if(dev){
+			yaffs_FlushEntireDeviceCache(dev);
 			yaffs_CheckpointSave(dev);
+		}
 
 		yaffs_GrossUnlock(dev);
 
@@ -1397,7 +1659,7 @@ static int yaffs_do_sync_fs(struct super_block *sb)
 	}
 	return 0;
 }
-**/
+
 
 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2,6,17))
 static void yaffs_write_super(struct super_block *sb)
@@ -1406,9 +1668,11 @@ static int yaffs_write_super(struct super_block *sb)
 #endif
 {
 
-	T(YAFFS_TRACE_OS, (KERN_DEBUG "yaffs_write_super\n"));
+	T(YAFFS_TRACE_OS, ( "yaffs_write_super\n"));
+	if (yaffs_auto_checkpoint >= 2)
+		yaffs_do_sync_fs(sb);
 #if (LINUX_VERSION_CODE < KERNEL_VERSION(2,6,18))
-	return 0; /* yaffs_do_sync_fs(sb);*/
+	return 0; 
 #endif
 }
 
@@ -1420,12 +1684,50 @@ static int yaffs_sync_fs(struct super_block *sb)
 #endif
 {
 
-	T(YAFFS_TRACE_OS, (KERN_DEBUG "yaffs_sync_fs\n"));
+	T(YAFFS_TRACE_OS, ( "yaffs_sync_fs\n"));
 
-	return 0; /* yaffs_do_sync_fs(sb);*/
+	if (yaffs_auto_checkpoint >= 1)
+		yaffs_do_sync_fs(sb);
+	
+	return 0; 
 
 }
 
+#ifdef YAFFS_USE_OWN_IGET
+
+static struct inode * yaffs_iget(struct super_block *sb, unsigned long ino)
+{
+	struct inode *inode;
+	yaffs_Object *obj;
+	yaffs_Device *dev = yaffs_SuperToDevice(sb);
+
+	T(YAFFS_TRACE_OS,
+	  ( "yaffs_iget for %lu\n", ino));
+
+	inode = iget_locked(sb, ino);
+	if (!inode)
+		return ERR_PTR(-ENOMEM);
+	if (!(inode->i_state & I_NEW))
+		return inode;
+
+       /* NB This is called as a side effect of other functions, but
+	* we had to release the lock to prevent deadlocks, so
+	* need to lock again.
+	*/
+    
+	yaffs_GrossLock(dev);
+
+	obj = yaffs_FindObjectByNumber(dev, inode->i_ino);
+
+	yaffs_FillInodeFromObject(inode, obj);
+
+	yaffs_GrossUnlock(dev);
+	
+	unlock_new_inode(inode);
+	return inode;
+}
+
+#else
 
 static void yaffs_read_inode(struct inode *inode)
 {
@@ -1438,7 +1740,7 @@ static void yaffs_read_inode(struct inode *inode)
 	yaffs_Device *dev = yaffs_SuperToDevice(inode->i_sb);
 
 	T(YAFFS_TRACE_OS,
-	  (KERN_DEBUG "yaffs_read_inode for %d\n", (int)inode->i_ino));
+	  ( "yaffs_read_inode for %d\n", (int)inode->i_ino));
 
 	yaffs_GrossLock(dev);
 
@@ -1449,7 +1751,9 @@ static void yaffs_read_inode(struct inode *inode)
 	yaffs_GrossUnlock(dev);
 }
 
-static LIST_HEAD(yaffs_dev_list);
+#endif
+
+static YLIST_HEAD(yaffs_dev_list);
 
 #if 0 // not used
 static int yaffs_remount_fs(struct super_block *sb, int *flags, char *data)
@@ -1460,7 +1764,7 @@ static int yaffs_remount_fs(struct super_block *sb, int *flags, char *data)
 		struct mtd_info *mtd = yaffs_SuperToDevice(sb)->genericDevice;
 
 		T(YAFFS_TRACE_OS,
-			(KERN_DEBUG "yaffs_remount_fs: %s: RO\n", dev->name ));
+			( "yaffs_remount_fs: %s: RO\n", dev->name ));
 
 		yaffs_GrossLock(dev);
 
@@ -1475,7 +1779,7 @@ static int yaffs_remount_fs(struct super_block *sb, int *flags, char *data)
 	}
 	else {
 		T(YAFFS_TRACE_OS,
-			(KERN_DEBUG "yaffs_remount_fs: %s: RW\n", dev->name ));
+			( "yaffs_remount_fs: %s: RW\n", dev->name ));
 	}
 
 	return 0;
@@ -1486,7 +1790,7 @@ static void yaffs_put_super(struct super_block *sb)
 {
 	yaffs_Device *dev = yaffs_SuperToDevice(sb);
 
-	T(YAFFS_TRACE_OS, (KERN_DEBUG "yaffs_put_super\n"));
+	T(YAFFS_TRACE_OS, ( "yaffs_put_super\n"));
 
 	yaffs_GrossLock(dev);
 
@@ -1503,7 +1807,7 @@ static void yaffs_put_super(struct super_block *sb)
 	yaffs_GrossUnlock(dev);
 
 	/* we assume this is protected by lock_kernel() in mount/umount */
-	list_del(&dev->devList);
+	ylist_del(&dev->devList);
 
 	if(dev->spareBuffer){
 		YFREE(dev->spareBuffer);
@@ -1531,9 +1835,9 @@ static void yaffs_MarkSuperBlockDirty(void *vsb)
 {
 	struct super_block *sb = (struct super_block *)vsb;
 
-	T(YAFFS_TRACE_OS, (KERN_DEBUG "yaffs_MarkSuperBlockDirty() sb = %p\n",sb));
-//	if(sb)
-//		sb->s_dirt = 1;
+	T(YAFFS_TRACE_OS, ( "yaffs_MarkSuperBlockDirty() sb = %p\n",sb));
+	if(sb)
+		sb->s_dirt = 1;
 }
 
 typedef struct {
@@ -1602,6 +1906,7 @@ static struct super_block *yaffs_internal_read_super(int yaffsVersion,
 
 	sb->s_magic = YAFFS_MAGIC;
 	sb->s_op = &yaffs_super_ops;
+	sb->s_flags |= MS_NOATIME;
 
 	if (!sb)
 		printk(KERN_INFO "yaffs: sb is NULL\n");
@@ -1673,27 +1978,24 @@ static struct super_block *yaffs_internal_read_super(int yaffsVersion,
 	T(YAFFS_TRACE_OS, (" %s %d\n", WRITE_SIZE_STR, WRITE_SIZE(mtd)));
 	T(YAFFS_TRACE_OS, (" oobsize %d\n", mtd->oobsize));
 	T(YAFFS_TRACE_OS, (" erasesize %d\n", mtd->erasesize));
-	T(YAFFS_TRACE_OS, (" size %d\n", mtd->size));
+#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,29)
+	T(YAFFS_TRACE_OS, (" size %u\n", mtd->size));
+#else
+	T(YAFFS_TRACE_OS, (" size %lld\n", mtd->size));
+#endif
 
 #ifdef CONFIG_YAFFS_AUTO_YAFFS2
 
 	if (yaffsVersion == 1 &&
-#if (LINUX_VERSION_CODE > KERNEL_VERSION(2,6,17))
-	    mtd->writesize >= 2048) {
-#else
-	    mtd->oobblock >= 2048) {
-#endif
+	    WRITE_SIZE(mtd) >= 2048) {
 	    T(YAFFS_TRACE_ALWAYS,("yaffs: auto selecting yaffs2\n"));
 	    yaffsVersion = 2;
 	}
 
 	/* Added NCB 26/5/2006 for completeness */
-	if (yaffsVersion == 2 &&
-#if (LINUX_VERSION_CODE > KERNEL_VERSION(2,6,17))
-	    mtd->writesize == 512) {
-#else
-	    mtd->oobblock == 512) {
-#endif
+	if (yaffsVersion == 2 && 
+	    !options.inband_tags &&
+	    WRITE_SIZE(mtd) == 512){
 	    T(YAFFS_TRACE_ALWAYS,("yaffs: auto selecting yaffs1\n"));
 	    yaffsVersion = 1;
 	}
@@ -1719,12 +2021,9 @@ static struct super_block *yaffs_internal_read_super(int yaffsVersion,
 			return NULL;
 		}
 
-#if (LINUX_VERSION_CODE > KERNEL_VERSION(2,6,17))
-		if (mtd->writesize < YAFFS_MIN_YAFFS2_CHUNK_SIZE ||
-#else
-		if (mtd->oobblock < YAFFS_MIN_YAFFS2_CHUNK_SIZE ||
-#endif
-		    mtd->oobsize < YAFFS_MIN_YAFFS2_SPARE_SIZE) {
+		if ((WRITE_SIZE(mtd) < YAFFS_MIN_YAFFS2_CHUNK_SIZE ||
+		    mtd->oobsize < YAFFS_MIN_YAFFS2_SPARE_SIZE) &&
+		    !options.inband_tags) {
 			T(YAFFS_TRACE_ALWAYS,
 			  ("yaffs: MTD device does not have the "
 			   "right page sizes\n"));
@@ -1780,13 +2079,15 @@ static struct super_block *yaffs_internal_read_super(int yaffsVersion,
 
 	/* Set up the memory size parameters.... */
 
-	nBlocks = mtd->size / (YAFFS_CHUNKS_PER_BLOCK * YAFFS_BYTES_PER_CHUNK);
+	nBlocks = YCALCBLOCKS(mtd->size ,(YAFFS_CHUNKS_PER_BLOCK * YAFFS_BYTES_PER_CHUNK));
+
 	dev->startBlock = 0;
 	dev->endBlock = nBlocks - 1;
 	dev->nChunksPerBlock = YAFFS_CHUNKS_PER_BLOCK;
-	dev->nDataBytesPerChunk = YAFFS_BYTES_PER_CHUNK;
+	dev->totalBytesPerChunk = YAFFS_BYTES_PER_CHUNK;
 	dev->nReservedBlocks = 5;
 	dev->nShortOpCaches = (options.no_cache) ? 0 : 10;
+	dev->inbandTags = options.inband_tags;
 
 	/* ... and the functions. */
 	if (yaffsVersion == 2) {
@@ -1799,13 +2100,13 @@ static struct super_block *yaffs_internal_read_super(int yaffsVersion,
 		dev->spareBuffer = YMALLOC(mtd->oobsize);
 		dev->isYaffs2 = 1;
 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2,6,17))
-		dev->nDataBytesPerChunk = mtd->writesize;
+		dev->totalBytesPerChunk = mtd->writesize;
 		dev->nChunksPerBlock = mtd->erasesize / mtd->writesize;
 #else
-		dev->nDataBytesPerChunk = mtd->oobblock;
+		dev->totalBytesPerChunk = mtd->oobblock;
 		dev->nChunksPerBlock = mtd->erasesize / mtd->oobblock;
 #endif
-		nBlocks = mtd->size / mtd->erasesize;
+		nBlocks = YCALCBLOCKS(mtd->size,mtd->erasesize);
 
 		dev->startBlock = 0;
 		dev->endBlock = nBlocks - 1;
@@ -1846,7 +2147,7 @@ static struct super_block *yaffs_internal_read_super(int yaffsVersion,
 	dev->skipCheckpointWrite = options.skip_checkpoint_write;
 
 	/* we assume this is protected by lock_kernel() in mount/umount */
-	list_add_tail(&dev->devList, &yaffs_dev_list);
+	ylist_add_tail(&dev->devList, &yaffs_dev_list);
 
 	init_MUTEX(&dev->grossLock);
 
@@ -1883,6 +2184,9 @@ static struct super_block *yaffs_internal_read_super(int yaffsVersion,
 		return NULL;
 	}
 	sb->s_root = root;
+	sb->s_dirt = !dev->isCheckpointed;
+	T(YAFFS_TRACE_ALWAYS,
+	  ("yaffs_read_super: isCheckpointed %d\n", dev->isCheckpointed));
 
 	T(YAFFS_TRACE_OS, ("yaffs_read_super: done\n"));
 	return sb;
@@ -1989,6 +2293,7 @@ static char *yaffs_dump_dev(char *buf, yaffs_Device * dev)
 {
 	buf += sprintf(buf, "startBlock......... %d\n", dev->startBlock);
 	buf += sprintf(buf, "endBlock........... %d\n", dev->endBlock);
+	buf += sprintf(buf, "totalBytesPerChunk. %d\n", dev->totalBytesPerChunk);
 	buf += sprintf(buf, "nDataBytesPerChunk. %d\n", dev->nDataBytesPerChunk);
 	buf += sprintf(buf, "chunkGroupBits..... %d\n", dev->chunkGroupBits);
 	buf += sprintf(buf, "chunkGroupSize..... %d\n", dev->chunkGroupSize);
@@ -2004,10 +2309,8 @@ static char *yaffs_dump_dev(char *buf, yaffs_Device * dev)
 	buf += sprintf(buf, "nPageReads......... %d\n", dev->nPageReads);
 	buf += sprintf(buf, "nBlockErasures..... %d\n", dev->nBlockErasures);
 	buf += sprintf(buf, "nGCCopies.......... %d\n", dev->nGCCopies);
-	buf +=
-	    sprintf(buf, "garbageCollections. %d\n", dev->garbageCollections);
-	buf +=
-	    sprintf(buf, "passiveGCs......... %d\n",
+	buf += sprintf(buf, "garbageCollections. %d\n", dev->garbageCollections);
+	buf += sprintf(buf, "passiveGCs......... %d\n",
 		    dev->passiveGarbageCollections);
 	buf += sprintf(buf, "nRetriedWrites..... %d\n", dev->nRetriedWrites);
 	buf += sprintf(buf, "nShortOpCaches..... %d\n", dev->nShortOpCaches);
@@ -2023,6 +2326,7 @@ static char *yaffs_dump_dev(char *buf, yaffs_Device * dev)
 	    sprintf(buf, "nBackgroudDeletions %d\n", dev->nBackgroundDeletions);
 	buf += sprintf(buf, "useNANDECC......... %d\n", dev->useNANDECC);
 	buf += sprintf(buf, "isYaffs2........... %d\n", dev->isYaffs2);
+	buf += sprintf(buf, "inbandTags......... %d\n", dev->inbandTags);
 
 	return buf;
 }
@@ -2031,7 +2335,7 @@ static int yaffs_proc_read(char *page,
 			   char **start,
 			   off_t offset, int count, int *eof, void *data)
 {
-	struct list_head *item;
+	struct ylist_head *item;
 	char *buf = page;
 	int step = offset;
 	int n = 0;
@@ -2055,8 +2359,8 @@ static int yaffs_proc_read(char *page,
 	lock_kernel();
 
 	/* Locate and print the Nth entry.  Order N-squared but N is small. */
-	list_for_each(item, &yaffs_dev_list) {
-		yaffs_Device *dev = list_entry(item, yaffs_Device, devList);
+	ylist_for_each(item, &yaffs_dev_list) {
+		yaffs_Device *dev = ylist_entry(item, yaffs_Device, devList);
 		if (n < step) {
 			n++;
 			continue;
@@ -2229,7 +2533,7 @@ static int __init init_yaffs_fs(void)
 	/* Install the proc_fs entry */
 	my_proc_entry = create_proc_entry("yaffs",
 					       S_IRUGO | S_IFREG,
-					       &proc_root);
+					       YPROC_ROOT);
 
 	if (my_proc_entry) {
 		my_proc_entry->write_proc = yaffs_proc_write;
@@ -2275,7 +2579,7 @@ static void __exit exit_yaffs_fs(void)
 	T(YAFFS_TRACE_ALWAYS, ("yaffs " __DATE__ " " __TIME__
 			       " removing. \n"));
 
-	remove_proc_entry("yaffs", &proc_root);
+	remove_proc_entry("yaffs", YPROC_ROOT);
 
 	fsinst = fs_to_install;