[PATCH] ext4: rename ext4 symbols to avoid duplication of ext3 symbols

Mingming Cao originally did this work, and Shaggy reproduced it using some
scripts from her.

Signed-off-by: Mingming Cao <cmm@us.ibm.com>
Signed-off-by: Dave Kleikamp <shaggy@austin.ibm.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

1 files changed, 351 insertions, 351 deletions

diff --git a/include/linux/ext4_fs.h b/include/linux/ext4_fs.h
index 11cca1bdc0c7..f582cd762caf 100644
--- a/include/linux/ext4_fs.h
+++ b/include/linux/ext4_fs.h
@@ -1,5 +1,5 @@
 /*
- *  linux/include/linux/ext3_fs.h
+ *  linux/include/linux/ext4_fs.h
  *
  * Copyright (C) 1992, 1993, 1994, 1995
  * Remy Card (card@masi.ibp.fr)
@@ -13,8 +13,8 @@
  *  Copyright (C) 1991, 1992  Linus Torvalds
  */
 
-#ifndef _LINUX_EXT3_FS_H
-#define _LINUX_EXT3_FS_H
+#ifndef _LINUX_EXT4_FS_H
+#define _LINUX_EXT4_FS_H
 
 #include <linux/types.h>
 #include <linux/magic.h>
@@ -24,102 +24,102 @@
  */
 
 /*
- * Define EXT3FS_DEBUG to produce debug messages
+ * Define EXT4FS_DEBUG to produce debug messages
  */
-#undef EXT3FS_DEBUG
+#undef EXT4FS_DEBUG
 
 /*
- * Define EXT3_RESERVATION to reserve data blocks for expanding files
+ * Define EXT4_RESERVATION to reserve data blocks for expanding files
  */
-#define EXT3_DEFAULT_RESERVE_BLOCKS     8
+#define EXT4_DEFAULT_RESERVE_BLOCKS     8
 /*max window size: 1024(direct blocks) + 3([t,d]indirect blocks) */
-#define EXT3_MAX_RESERVE_BLOCKS         1027
-#define EXT3_RESERVE_WINDOW_NOT_ALLOCATED 0
+#define EXT4_MAX_RESERVE_BLOCKS         1027
+#define EXT4_RESERVE_WINDOW_NOT_ALLOCATED 0
 /*
  * Always enable hashed directories
  */
-#define CONFIG_EXT3_INDEX
+#define CONFIG_EXT4_INDEX
 
 /*
  * Debug code
  */
-#ifdef EXT3FS_DEBUG
-#define ext3_debug(f, a...)						\
+#ifdef EXT4FS_DEBUG
+#define ext4_debug(f, a...)						\
 	do {								\
-		printk (KERN_DEBUG "EXT3-fs DEBUG (%s, %d): %s:",	\
+		printk (KERN_DEBUG "EXT4-fs DEBUG (%s, %d): %s:",	\
 			__FILE__, __LINE__, __FUNCTION__);		\
 		printk (KERN_DEBUG f, ## a);				\
 	} while (0)
 #else
-#define ext3_debug(f, a...)	do {} while (0)
+#define ext4_debug(f, a...)	do {} while (0)
 #endif
 
 /*
  * Special inodes numbers
  */
-#define	EXT3_BAD_INO		 1	/* Bad blocks inode */
-#define EXT3_ROOT_INO		 2	/* Root inode */
-#define EXT3_BOOT_LOADER_INO	 5	/* Boot loader inode */
-#define EXT3_UNDEL_DIR_INO	 6	/* Undelete directory inode */
-#define EXT3_RESIZE_INO		 7	/* Reserved group descriptors inode */
-#define EXT3_JOURNAL_INO	 8	/* Journal inode */
+#define	EXT4_BAD_INO		 1	/* Bad blocks inode */
+#define EXT4_ROOT_INO		 2	/* Root inode */
+#define EXT4_BOOT_LOADER_INO	 5	/* Boot loader inode */
+#define EXT4_UNDEL_DIR_INO	 6	/* Undelete directory inode */
+#define EXT4_RESIZE_INO		 7	/* Reserved group descriptors inode */
+#define EXT4_JOURNAL_INO	 8	/* Journal inode */
 
-/* First non-reserved inode for old ext3 filesystems */
-#define EXT3_GOOD_OLD_FIRST_INO	11
+/* First non-reserved inode for old ext4 filesystems */
+#define EXT4_GOOD_OLD_FIRST_INO	11
 
 /*
  * Maximal count of links to a file
  */
-#define EXT3_LINK_MAX		32000
+#define EXT4_LINK_MAX		32000
 
 /*
  * Macro-instructions used to manage several block sizes
  */
-#define EXT3_MIN_BLOCK_SIZE		1024
-#define	EXT3_MAX_BLOCK_SIZE		4096
-#define EXT3_MIN_BLOCK_LOG_SIZE		  10
+#define EXT4_MIN_BLOCK_SIZE		1024
+#define	EXT4_MAX_BLOCK_SIZE		4096
+#define EXT4_MIN_BLOCK_LOG_SIZE		  10
 #ifdef __KERNEL__
-# define EXT3_BLOCK_SIZE(s)		((s)->s_blocksize)
+# define EXT4_BLOCK_SIZE(s)		((s)->s_blocksize)
 #else
-# define EXT3_BLOCK_SIZE(s)		(EXT3_MIN_BLOCK_SIZE << (s)->s_log_block_size)
+# define EXT4_BLOCK_SIZE(s)		(EXT4_MIN_BLOCK_SIZE << (s)->s_log_block_size)
 #endif
-#define	EXT3_ADDR_PER_BLOCK(s)		(EXT3_BLOCK_SIZE(s) / sizeof (__u32))
+#define	EXT4_ADDR_PER_BLOCK(s)		(EXT4_BLOCK_SIZE(s) / sizeof (__u32))
 #ifdef __KERNEL__
-# define EXT3_BLOCK_SIZE_BITS(s)	((s)->s_blocksize_bits)
+# define EXT4_BLOCK_SIZE_BITS(s)	((s)->s_blocksize_bits)
 #else
-# define EXT3_BLOCK_SIZE_BITS(s)	((s)->s_log_block_size + 10)
+# define EXT4_BLOCK_SIZE_BITS(s)	((s)->s_log_block_size + 10)
 #endif
 #ifdef __KERNEL__
-#define	EXT3_ADDR_PER_BLOCK_BITS(s)	(EXT3_SB(s)->s_addr_per_block_bits)
-#define EXT3_INODE_SIZE(s)		(EXT3_SB(s)->s_inode_size)
-#define EXT3_FIRST_INO(s)		(EXT3_SB(s)->s_first_ino)
+#define	EXT4_ADDR_PER_BLOCK_BITS(s)	(EXT4_SB(s)->s_addr_per_block_bits)
+#define EXT4_INODE_SIZE(s)		(EXT4_SB(s)->s_inode_size)
+#define EXT4_FIRST_INO(s)		(EXT4_SB(s)->s_first_ino)
 #else
-#define EXT3_INODE_SIZE(s)	(((s)->s_rev_level == EXT3_GOOD_OLD_REV) ? \
-				 EXT3_GOOD_OLD_INODE_SIZE : \
+#define EXT4_INODE_SIZE(s)	(((s)->s_rev_level == EXT4_GOOD_OLD_REV) ? \
+				 EXT4_GOOD_OLD_INODE_SIZE : \
 				 (s)->s_inode_size)
-#define EXT3_FIRST_INO(s)	(((s)->s_rev_level == EXT3_GOOD_OLD_REV) ? \
-				 EXT3_GOOD_OLD_FIRST_INO : \
+#define EXT4_FIRST_INO(s)	(((s)->s_rev_level == EXT4_GOOD_OLD_REV) ? \
+				 EXT4_GOOD_OLD_FIRST_INO : \
 				 (s)->s_first_ino)
 #endif
 
 /*
  * Macro-instructions used to manage fragments
  */
-#define EXT3_MIN_FRAG_SIZE		1024
-#define	EXT3_MAX_FRAG_SIZE		4096
-#define EXT3_MIN_FRAG_LOG_SIZE		  10
+#define EXT4_MIN_FRAG_SIZE		1024
+#define	EXT4_MAX_FRAG_SIZE		4096
+#define EXT4_MIN_FRAG_LOG_SIZE		  10
 #ifdef __KERNEL__
-# define EXT3_FRAG_SIZE(s)		(EXT3_SB(s)->s_frag_size)
-# define EXT3_FRAGS_PER_BLOCK(s)	(EXT3_SB(s)->s_frags_per_block)
+# define EXT4_FRAG_SIZE(s)		(EXT4_SB(s)->s_frag_size)
+# define EXT4_FRAGS_PER_BLOCK(s)	(EXT4_SB(s)->s_frags_per_block)
 #else
-# define EXT3_FRAG_SIZE(s)		(EXT3_MIN_FRAG_SIZE << (s)->s_log_frag_size)
-# define EXT3_FRAGS_PER_BLOCK(s)	(EXT3_BLOCK_SIZE(s) / EXT3_FRAG_SIZE(s))
+# define EXT4_FRAG_SIZE(s)		(EXT4_MIN_FRAG_SIZE << (s)->s_log_frag_size)
+# define EXT4_FRAGS_PER_BLOCK(s)	(EXT4_BLOCK_SIZE(s) / EXT4_FRAG_SIZE(s))
 #endif
 
 /*
  * Structure of a blocks group descriptor
  */
-struct ext3_group_desc
+struct ext4_group_desc
 {
 	__le32	bg_block_bitmap;		/* Blocks bitmap block */
 	__le32	bg_inode_bitmap;		/* Inodes bitmap block */
@@ -135,62 +135,62 @@ struct ext3_group_desc
  * Macro-instructions used to manage group descriptors
  */
 #ifdef __KERNEL__
-# define EXT3_BLOCKS_PER_GROUP(s)	(EXT3_SB(s)->s_blocks_per_group)
-# define EXT3_DESC_PER_BLOCK(s)		(EXT3_SB(s)->s_desc_per_block)
-# define EXT3_INODES_PER_GROUP(s)	(EXT3_SB(s)->s_inodes_per_group)
-# define EXT3_DESC_PER_BLOCK_BITS(s)	(EXT3_SB(s)->s_desc_per_block_bits)
+# define EXT4_BLOCKS_PER_GROUP(s)	(EXT4_SB(s)->s_blocks_per_group)
+# define EXT4_DESC_PER_BLOCK(s)		(EXT4_SB(s)->s_desc_per_block)
+# define EXT4_INODES_PER_GROUP(s)	(EXT4_SB(s)->s_inodes_per_group)
+# define EXT4_DESC_PER_BLOCK_BITS(s)	(EXT4_SB(s)->s_desc_per_block_bits)
 #else
-# define EXT3_BLOCKS_PER_GROUP(s)	((s)->s_blocks_per_group)
-# define EXT3_DESC_PER_BLOCK(s)		(EXT3_BLOCK_SIZE(s) / sizeof (struct ext3_group_desc))
-# define EXT3_INODES_PER_GROUP(s)	((s)->s_inodes_per_group)
+# define EXT4_BLOCKS_PER_GROUP(s)	((s)->s_blocks_per_group)
+# define EXT4_DESC_PER_BLOCK(s)		(EXT4_BLOCK_SIZE(s) / sizeof (struct ext4_group_desc))
+# define EXT4_INODES_PER_GROUP(s)	((s)->s_inodes_per_group)
 #endif
 
 /*
  * Constants relative to the data blocks
  */
-#define	EXT3_NDIR_BLOCKS		12
-#define	EXT3_IND_BLOCK			EXT3_NDIR_BLOCKS
-#define	EXT3_DIND_BLOCK			(EXT3_IND_BLOCK + 1)
-#define	EXT3_TIND_BLOCK			(EXT3_DIND_BLOCK + 1)
-#define	EXT3_N_BLOCKS			(EXT3_TIND_BLOCK + 1)
+#define	EXT4_NDIR_BLOCKS		12
+#define	EXT4_IND_BLOCK			EXT4_NDIR_BLOCKS
+#define	EXT4_DIND_BLOCK			(EXT4_IND_BLOCK + 1)
+#define	EXT4_TIND_BLOCK			(EXT4_DIND_BLOCK + 1)
+#define	EXT4_N_BLOCKS			(EXT4_TIND_BLOCK + 1)
 
 /*
  * Inode flags
  */
-#define	EXT3_SECRM_FL			0x00000001 /* Secure deletion */
-#define	EXT3_UNRM_FL			0x00000002 /* Undelete */
-#define	EXT3_COMPR_FL			0x00000004 /* Compress file */
-#define EXT3_SYNC_FL			0x00000008 /* Synchronous updates */
-#define EXT3_IMMUTABLE_FL		0x00000010 /* Immutable file */
-#define EXT3_APPEND_FL			0x00000020 /* writes to file may only append */
-#define EXT3_NODUMP_FL			0x00000040 /* do not dump file */
-#define EXT3_NOATIME_FL			0x00000080 /* do not update atime */
+#define	EXT4_SECRM_FL			0x00000001 /* Secure deletion */
+#define	EXT4_UNRM_FL			0x00000002 /* Undelete */
+#define	EXT4_COMPR_FL			0x00000004 /* Compress file */
+#define EXT4_SYNC_FL			0x00000008 /* Synchronous updates */
+#define EXT4_IMMUTABLE_FL		0x00000010 /* Immutable file */
+#define EXT4_APPEND_FL			0x00000020 /* writes to file may only append */
+#define EXT4_NODUMP_FL			0x00000040 /* do not dump file */
+#define EXT4_NOATIME_FL			0x00000080 /* do not update atime */
 /* Reserved for compression usage... */
-#define EXT3_DIRTY_FL			0x00000100
-#define EXT3_COMPRBLK_FL		0x00000200 /* One or more compressed clusters */
-#define EXT3_NOCOMPR_FL			0x00000400 /* Don't compress */
-#define EXT3_ECOMPR_FL			0x00000800 /* Compression error */
+#define EXT4_DIRTY_FL			0x00000100
+#define EXT4_COMPRBLK_FL		0x00000200 /* One or more compressed clusters */
+#define EXT4_NOCOMPR_FL			0x00000400 /* Don't compress */
+#define EXT4_ECOMPR_FL			0x00000800 /* Compression error */
 /* End compression flags --- maybe not all used */
-#define EXT3_INDEX_FL			0x00001000 /* hash-indexed directory */
-#define EXT3_IMAGIC_FL			0x00002000 /* AFS directory */
-#define EXT3_JOURNAL_DATA_FL		0x00004000 /* file data should be journaled */
-#define EXT3_NOTAIL_FL			0x00008000 /* file tail should not be merged */
-#define EXT3_DIRSYNC_FL			0x00010000 /* dirsync behaviour (directories only) */
-#define EXT3_TOPDIR_FL			0x00020000 /* Top of directory hierarchies*/
-#define EXT3_RESERVED_FL		0x80000000 /* reserved for ext3 lib */
+#define EXT4_INDEX_FL			0x00001000 /* hash-indexed directory */
+#define EXT4_IMAGIC_FL			0x00002000 /* AFS directory */
+#define EXT4_JOURNAL_DATA_FL		0x00004000 /* file data should be journaled */
+#define EXT4_NOTAIL_FL			0x00008000 /* file tail should not be merged */
+#define EXT4_DIRSYNC_FL			0x00010000 /* dirsync behaviour (directories only) */
+#define EXT4_TOPDIR_FL			0x00020000 /* Top of directory hierarchies*/
+#define EXT4_RESERVED_FL		0x80000000 /* reserved for ext4 lib */
 
-#define EXT3_FL_USER_VISIBLE		0x0003DFFF /* User visible flags */
-#define EXT3_FL_USER_MODIFIABLE		0x000380FF /* User modifiable flags */
+#define EXT4_FL_USER_VISIBLE		0x0003DFFF /* User visible flags */
+#define EXT4_FL_USER_MODIFIABLE		0x000380FF /* User modifiable flags */
 
 /*
  * Inode dynamic state flags
  */
-#define EXT3_STATE_JDATA		0x00000001 /* journaled data exists */
-#define EXT3_STATE_NEW			0x00000002 /* inode is newly created */
-#define EXT3_STATE_XATTR		0x00000004 /* has in-inode xattrs */
+#define EXT4_STATE_JDATA		0x00000001 /* journaled data exists */
+#define EXT4_STATE_NEW			0x00000002 /* inode is newly created */
+#define EXT4_STATE_XATTR		0x00000004 /* has in-inode xattrs */
 
 /* Used to pass group descriptor data when online resize is done */
-struct ext3_new_group_input {
+struct ext4_new_group_input {
 	__u32 group;            /* Group number for this data */
 	__u32 block_bitmap;     /* Absolute block number of block bitmap */
 	__u32 inode_bitmap;     /* Absolute block number of inode bitmap */
@@ -200,8 +200,8 @@ struct ext3_new_group_input {
 	__u16 unused;
 };
 
-/* The struct ext3_new_group_input in kernel space, with free_blocks_count */
-struct ext3_new_group_data {
+/* The struct ext4_new_group_input in kernel space, with free_blocks_count */
+struct ext4_new_group_data {
 	__u32 group;
 	__u32 block_bitmap;
 	__u32 inode_bitmap;
@@ -216,41 +216,41 @@ struct ext3_new_group_data {
 /*
  * ioctl commands
  */
-#define	EXT3_IOC_GETFLAGS		FS_IOC_GETFLAGS
-#define	EXT3_IOC_SETFLAGS		FS_IOC_SETFLAGS
-#define	EXT3_IOC_GETVERSION		_IOR('f', 3, long)
-#define	EXT3_IOC_SETVERSION		_IOW('f', 4, long)
-#define EXT3_IOC_GROUP_EXTEND		_IOW('f', 7, unsigned long)
-#define EXT3_IOC_GROUP_ADD		_IOW('f', 8,struct ext3_new_group_input)
-#define	EXT3_IOC_GETVERSION_OLD		FS_IOC_GETVERSION
-#define	EXT3_IOC_SETVERSION_OLD		FS_IOC_SETVERSION
+#define	EXT4_IOC_GETFLAGS		FS_IOC_GETFLAGS
+#define	EXT4_IOC_SETFLAGS		FS_IOC_SETFLAGS
+#define	EXT4_IOC_GETVERSION		_IOR('f', 3, long)
+#define	EXT4_IOC_SETVERSION		_IOW('f', 4, long)
+#define EXT4_IOC_GROUP_EXTEND		_IOW('f', 7, unsigned long)
+#define EXT4_IOC_GROUP_ADD		_IOW('f', 8,struct ext4_new_group_input)
+#define	EXT4_IOC_GETVERSION_OLD		FS_IOC_GETVERSION
+#define	EXT4_IOC_SETVERSION_OLD		FS_IOC_SETVERSION
 #ifdef CONFIG_JBD_DEBUG
-#define EXT3_IOC_WAIT_FOR_READONLY	_IOR('f', 99, long)
+#define EXT4_IOC_WAIT_FOR_READONLY	_IOR('f', 99, long)
 #endif
-#define EXT3_IOC_GETRSVSZ		_IOR('f', 5, long)
-#define EXT3_IOC_SETRSVSZ		_IOW('f', 6, long)
+#define EXT4_IOC_GETRSVSZ		_IOR('f', 5, long)
+#define EXT4_IOC_SETRSVSZ		_IOW('f', 6, long)
 
 /*
  * ioctl commands in 32 bit emulation
  */
-#define EXT3_IOC32_GETFLAGS		FS_IOC32_GETFLAGS
-#define EXT3_IOC32_SETFLAGS		FS_IOC32_SETFLAGS
-#define EXT3_IOC32_GETVERSION		_IOR('f', 3, int)
-#define EXT3_IOC32_SETVERSION		_IOW('f', 4, int)
-#define EXT3_IOC32_GETRSVSZ		_IOR('f', 5, int)
-#define EXT3_IOC32_SETRSVSZ		_IOW('f', 6, int)
-#define EXT3_IOC32_GROUP_EXTEND		_IOW('f', 7, unsigned int)
+#define EXT4_IOC32_GETFLAGS		FS_IOC32_GETFLAGS
+#define EXT4_IOC32_SETFLAGS		FS_IOC32_SETFLAGS
+#define EXT4_IOC32_GETVERSION		_IOR('f', 3, int)
+#define EXT4_IOC32_SETVERSION		_IOW('f', 4, int)
+#define EXT4_IOC32_GETRSVSZ		_IOR('f', 5, int)
+#define EXT4_IOC32_SETRSVSZ		_IOW('f', 6, int)
+#define EXT4_IOC32_GROUP_EXTEND		_IOW('f', 7, unsigned int)
 #ifdef CONFIG_JBD_DEBUG
-#define EXT3_IOC32_WAIT_FOR_READONLY	_IOR('f', 99, int)
+#define EXT4_IOC32_WAIT_FOR_READONLY	_IOR('f', 99, int)
 #endif
-#define EXT3_IOC32_GETVERSION_OLD	FS_IOC32_GETVERSION
-#define EXT3_IOC32_SETVERSION_OLD	FS_IOC32_SETVERSION
+#define EXT4_IOC32_GETVERSION_OLD	FS_IOC32_GETVERSION
+#define EXT4_IOC32_SETVERSION_OLD	FS_IOC32_SETVERSION
 
 
 /*
  *  Mount options
  */
-struct ext3_mount_options {
+struct ext4_mount_options {
 	unsigned long s_mount_opt;
 	uid_t s_resuid;
 	gid_t s_resgid;
@@ -264,7 +264,7 @@ struct ext3_mount_options {
 /*
  * Structure of an inode on the disk
  */
-struct ext3_inode {
+struct ext4_inode {
 	__le16	i_mode;		/* File mode */
 	__le16	i_uid;		/* Low 16 bits of Owner Uid */
 	__le32	i_size;		/* Size in bytes */
@@ -287,7 +287,7 @@ struct ext3_inode {
 			__u32  m_i_reserved1;
 		} masix1;
 	} osd1;				/* OS dependent 1 */
-	__le32	i_block[EXT3_N_BLOCKS];/* Pointers to blocks */
+	__le32	i_block[EXT4_N_BLOCKS];/* Pointers to blocks */
 	__le32	i_generation;	/* File version (for NFS) */
 	__le32	i_file_acl;	/* File ACL */
 	__le32	i_dir_acl;	/* Directory ACL */
@@ -353,76 +353,76 @@ struct ext3_inode {
 /*
  * File system states
  */
-#define	EXT3_VALID_FS			0x0001	/* Unmounted cleanly */
-#define	EXT3_ERROR_FS			0x0002	/* Errors detected */
-#define	EXT3_ORPHAN_FS			0x0004	/* Orphans being recovered */
+#define	EXT4_VALID_FS			0x0001	/* Unmounted cleanly */
+#define	EXT4_ERROR_FS			0x0002	/* Errors detected */
+#define	EXT4_ORPHAN_FS			0x0004	/* Orphans being recovered */
 
 /*
  * Mount flags
  */
-#define EXT3_MOUNT_CHECK		0x00001	/* Do mount-time checks */
-#define EXT3_MOUNT_OLDALLOC		0x00002  /* Don't use the new Orlov allocator */
-#define EXT3_MOUNT_GRPID		0x00004	/* Create files with directory's group */
-#define EXT3_MOUNT_DEBUG		0x00008	/* Some debugging messages */
-#define EXT3_MOUNT_ERRORS_CONT		0x00010	/* Continue on errors */
-#define EXT3_MOUNT_ERRORS_RO		0x00020	/* Remount fs ro on errors */
-#define EXT3_MOUNT_ERRORS_PANIC		0x00040	/* Panic on errors */
-#define EXT3_MOUNT_MINIX_DF		0x00080	/* Mimics the Minix statfs */
-#define EXT3_MOUNT_NOLOAD		0x00100	/* Don't use existing journal*/
-#define EXT3_MOUNT_ABORT		0x00200	/* Fatal error detected */
-#define EXT3_MOUNT_DATA_FLAGS		0x00C00	/* Mode for data writes: */
-#define EXT3_MOUNT_JOURNAL_DATA		0x00400	/* Write data to journal */
-#define EXT3_MOUNT_ORDERED_DATA		0x00800	/* Flush data before commit */
-#define EXT3_MOUNT_WRITEBACK_DATA	0x00C00	/* No data ordering */
-#define EXT3_MOUNT_UPDATE_JOURNAL	0x01000	/* Update the journal format */
-#define EXT3_MOUNT_NO_UID32		0x02000  /* Disable 32-bit UIDs */
-#define EXT3_MOUNT_XATTR_USER		0x04000	/* Extended user attributes */
-#define EXT3_MOUNT_POSIX_ACL		0x08000	/* POSIX Access Control Lists */
-#define EXT3_MOUNT_RESERVATION		0x10000	/* Preallocation */
-#define EXT3_MOUNT_BARRIER		0x20000 /* Use block barriers */
-#define EXT3_MOUNT_NOBH			0x40000 /* No bufferheads */
-#define EXT3_MOUNT_QUOTA		0x80000 /* Some quota option set */
-#define EXT3_MOUNT_USRQUOTA		0x100000 /* "old" user quota */
-#define EXT3_MOUNT_GRPQUOTA		0x200000 /* "old" group quota */
-
-/* Compatibility, for having both ext2_fs.h and ext3_fs.h included at once */
+#define EXT4_MOUNT_CHECK		0x00001	/* Do mount-time checks */
+#define EXT4_MOUNT_OLDALLOC		0x00002  /* Don't use the new Orlov allocator */
+#define EXT4_MOUNT_GRPID		0x00004	/* Create files with directory's group */
+#define EXT4_MOUNT_DEBUG		0x00008	/* Some debugging messages */
+#define EXT4_MOUNT_ERRORS_CONT		0x00010	/* Continue on errors */
+#define EXT4_MOUNT_ERRORS_RO		0x00020	/* Remount fs ro on errors */
+#define EXT4_MOUNT_ERRORS_PANIC		0x00040	/* Panic on errors */
+#define EXT4_MOUNT_MINIX_DF		0x00080	/* Mimics the Minix statfs */
+#define EXT4_MOUNT_NOLOAD		0x00100	/* Don't use existing journal*/
+#define EXT4_MOUNT_ABORT		0x00200	/* Fatal error detected */
+#define EXT4_MOUNT_DATA_FLAGS		0x00C00	/* Mode for data writes: */
+#define EXT4_MOUNT_JOURNAL_DATA		0x00400	/* Write data to journal */
+#define EXT4_MOUNT_ORDERED_DATA		0x00800	/* Flush data before commit */
+#define EXT4_MOUNT_WRITEBACK_DATA	0x00C00	/* No data ordering */
+#define EXT4_MOUNT_UPDATE_JOURNAL	0x01000	/* Update the journal format */
+#define EXT4_MOUNT_NO_UID32		0x02000  /* Disable 32-bit UIDs */
+#define EXT4_MOUNT_XATTR_USER		0x04000	/* Extended user attributes */
+#define EXT4_MOUNT_POSIX_ACL		0x08000	/* POSIX Access Control Lists */
+#define EXT4_MOUNT_RESERVATION		0x10000	/* Preallocation */
+#define EXT4_MOUNT_BARRIER		0x20000 /* Use block barriers */
+#define EXT4_MOUNT_NOBH			0x40000 /* No bufferheads */
+#define EXT4_MOUNT_QUOTA		0x80000 /* Some quota option set */
+#define EXT4_MOUNT_USRQUOTA		0x100000 /* "old" user quota */
+#define EXT4_MOUNT_GRPQUOTA		0x200000 /* "old" group quota */
+
+/* Compatibility, for having both ext2_fs.h and ext4_fs.h included at once */
 #ifndef _LINUX_EXT2_FS_H
-#define clear_opt(o, opt)		o &= ~EXT3_MOUNT_##opt
-#define set_opt(o, opt)			o |= EXT3_MOUNT_##opt
-#define test_opt(sb, opt)		(EXT3_SB(sb)->s_mount_opt & \
-					 EXT3_MOUNT_##opt)
+#define clear_opt(o, opt)		o &= ~EXT4_MOUNT_##opt
+#define set_opt(o, opt)			o |= EXT4_MOUNT_##opt
+#define test_opt(sb, opt)		(EXT4_SB(sb)->s_mount_opt & \
+					 EXT4_MOUNT_##opt)
 #else
-#define EXT2_MOUNT_NOLOAD		EXT3_MOUNT_NOLOAD
-#define EXT2_MOUNT_ABORT		EXT3_MOUNT_ABORT
-#define EXT2_MOUNT_DATA_FLAGS		EXT3_MOUNT_DATA_FLAGS
+#define EXT2_MOUNT_NOLOAD		EXT4_MOUNT_NOLOAD
+#define EXT2_MOUNT_ABORT		EXT4_MOUNT_ABORT
+#define EXT2_MOUNT_DATA_FLAGS		EXT4_MOUNT_DATA_FLAGS
 #endif
 
-#define ext3_set_bit			ext2_set_bit
-#define ext3_set_bit_atomic		ext2_set_bit_atomic
-#define ext3_clear_bit			ext2_clear_bit
-#define ext3_clear_bit_atomic		ext2_clear_bit_atomic
-#define ext3_test_bit			ext2_test_bit
-#define ext3_find_first_zero_bit	ext2_find_first_zero_bit
-#define ext3_find_next_zero_bit		ext2_find_next_zero_bit
+#define ext4_set_bit			ext2_set_bit
+#define ext4_set_bit_atomic		ext2_set_bit_atomic
+#define ext4_clear_bit			ext2_clear_bit
+#define ext4_clear_bit_atomic		ext2_clear_bit_atomic
+#define ext4_test_bit			ext2_test_bit
+#define ext4_find_first_zero_bit	ext2_find_first_zero_bit
+#define ext4_find_next_zero_bit		ext2_find_next_zero_bit
 
 /*
  * Maximal mount counts between two filesystem checks
  */
-#define EXT3_DFL_MAX_MNT_COUNT		20	/* Allow 20 mounts */
-#define EXT3_DFL_CHECKINTERVAL		0	/* Don't use interval check */
+#define EXT4_DFL_MAX_MNT_COUNT		20	/* Allow 20 mounts */
+#define EXT4_DFL_CHECKINTERVAL		0	/* Don't use interval check */
 
 /*
  * Behaviour when detecting errors
  */
-#define EXT3_ERRORS_CONTINUE		1	/* Continue execution */
-#define EXT3_ERRORS_RO			2	/* Remount fs read-only */
-#define EXT3_ERRORS_PANIC		3	/* Panic */
-#define EXT3_ERRORS_DEFAULT		EXT3_ERRORS_CONTINUE
+#define EXT4_ERRORS_CONTINUE		1	/* Continue execution */
+#define EXT4_ERRORS_RO			2	/* Remount fs read-only */
+#define EXT4_ERRORS_PANIC		3	/* Panic */
+#define EXT4_ERRORS_DEFAULT		EXT4_ERRORS_CONTINUE
 
 /*
  * Structure of the super block
  */
-struct ext3_super_block {
+struct ext4_super_block {
 /*00*/	__le32	s_inodes_count;		/* Inodes count */
 	__le32	s_blocks_count;		/* Blocks count */
 	__le32	s_r_blocks_count;	/* Reserved blocks count */
@@ -449,7 +449,7 @@ struct ext3_super_block {
 /*50*/	__le16	s_def_resuid;		/* Default uid for reserved blocks */
 	__le16	s_def_resgid;		/* Default gid for reserved blocks */
 	/*
-	 * These fields are for EXT3_DYNAMIC_REV superblocks only.
+	 * These fields are for EXT4_DYNAMIC_REV superblocks only.
 	 *
 	 * Note: the difference between the compatible feature set and
 	 * the incompatible feature set is that if there is a bit set
@@ -473,13 +473,13 @@ struct ext3_super_block {
 /*C8*/	__le32	s_algorithm_usage_bitmap; /* For compression */
 	/*
 	 * Performance hints.  Directory preallocation should only
-	 * happen if the EXT3_FEATURE_COMPAT_DIR_PREALLOC flag is on.
+	 * happen if the EXT4_FEATURE_COMPAT_DIR_PREALLOC flag is on.
 	 */
 	__u8	s_prealloc_blocks;	/* Nr of blocks to try to preallocate*/
 	__u8	s_prealloc_dir_blocks;	/* Nr to preallocate for dirs */
 	__le16	s_reserved_gdt_blocks;	/* Per group desc for online growth */
 	/*
-	 * Journaling support valid if EXT3_FEATURE_COMPAT_HAS_JOURNAL set.
+	 * Journaling support valid if EXT4_FEATURE_COMPAT_HAS_JOURNAL set.
 	 */
 /*D0*/	__u8	s_journal_uuid[16];	/* uuid of journal superblock */
 /*E0*/	__le32	s_journal_inum;		/* inode number of journal file */
@@ -495,186 +495,186 @@ struct ext3_super_block {
 };
 
 #ifdef __KERNEL__
-#include <linux/ext3_fs_i.h>
-#include <linux/ext3_fs_sb.h>
-static inline struct ext3_sb_info * EXT3_SB(struct super_block *sb)
+#include <linux/ext4_fs_i.h>
+#include <linux/ext4_fs_sb.h>
+static inline struct ext4_sb_info * EXT4_SB(struct super_block *sb)
 {
 	return sb->s_fs_info;
 }
-static inline struct ext3_inode_info *EXT3_I(struct inode *inode)
+static inline struct ext4_inode_info *EXT4_I(struct inode *inode)
 {
-	return container_of(inode, struct ext3_inode_info, vfs_inode);
+	return container_of(inode, struct ext4_inode_info, vfs_inode);
 }
 
-static inline int ext3_valid_inum(struct super_block *sb, unsigned long ino)
+static inline int ext4_valid_inum(struct super_block *sb, unsigned long ino)
 {
-	return ino == EXT3_ROOT_INO ||
-		ino == EXT3_JOURNAL_INO ||
-		ino == EXT3_RESIZE_INO ||
-		(ino >= EXT3_FIRST_INO(sb) &&
-		 ino <= le32_to_cpu(EXT3_SB(sb)->s_es->s_inodes_count));
+	return ino == EXT4_ROOT_INO ||
+		ino == EXT4_JOURNAL_INO ||
+		ino == EXT4_RESIZE_INO ||
+		(ino >= EXT4_FIRST_INO(sb) &&
+		 ino <= le32_to_cpu(EXT4_SB(sb)->s_es->s_inodes_count));
 }
 #else
-/* Assume that user mode programs are passing in an ext3fs superblock, not
+/* Assume that user mode programs are passing in an ext4fs superblock, not
  * a kernel struct super_block.  This will allow us to call the feature-test
  * macros from user land. */
-#define EXT3_SB(sb)	(sb)
+#define EXT4_SB(sb)	(sb)
 #endif
 
-#define NEXT_ORPHAN(inode) EXT3_I(inode)->i_dtime
+#define NEXT_ORPHAN(inode) EXT4_I(inode)->i_dtime
 
 /*
  * Codes for operating systems
  */
-#define EXT3_OS_LINUX		0
-#define EXT3_OS_HURD		1
-#define EXT3_OS_MASIX		2
-#define EXT3_OS_FREEBSD		3
-#define EXT3_OS_LITES		4
+#define EXT4_OS_LINUX		0
+#define EXT4_OS_HURD		1
+#define EXT4_OS_MASIX		2
+#define EXT4_OS_FREEBSD		3
+#define EXT4_OS_LITES		4
 
 /*
  * Revision levels
  */
-#define EXT3_GOOD_OLD_REV	0	/* The good old (original) format */
-#define EXT3_DYNAMIC_REV	1	/* V2 format w/ dynamic inode sizes */
+#define EXT4_GOOD_OLD_REV	0	/* The good old (original) format */
+#define EXT4_DYNAMIC_REV	1	/* V2 format w/ dynamic inode sizes */
 
-#define EXT3_CURRENT_REV	EXT3_GOOD_OLD_REV
-#define EXT3_MAX_SUPP_REV	EXT3_DYNAMIC_REV
+#define EXT4_CURRENT_REV	EXT4_GOOD_OLD_REV
+#define EXT4_MAX_SUPP_REV	EXT4_DYNAMIC_REV
 
-#define EXT3_GOOD_OLD_INODE_SIZE 128
+#define EXT4_GOOD_OLD_INODE_SIZE 128
 
 /*
  * Feature set definitions
  */
 
-#define EXT3_HAS_COMPAT_FEATURE(sb,mask)			\
-	( EXT3_SB(sb)->s_es->s_feature_compat & cpu_to_le32(mask) )
-#define EXT3_HAS_RO_COMPAT_FEATURE(sb,mask)			\
-	( EXT3_SB(sb)->s_es->s_feature_ro_compat & cpu_to_le32(mask) )
-#define EXT3_HAS_INCOMPAT_FEATURE(sb,mask)			\
-	( EXT3_SB(sb)->s_es->s_feature_incompat & cpu_to_le32(mask) )
-#define EXT3_SET_COMPAT_FEATURE(sb,mask)			\
-	EXT3_SB(sb)->s_es->s_feature_compat |= cpu_to_le32(mask)
-#define EXT3_SET_RO_COMPAT_FEATURE(sb,mask)			\
-	EXT3_SB(sb)->s_es->s_feature_ro_compat |= cpu_to_le32(mask)
-#define EXT3_SET_INCOMPAT_FEATURE(sb,mask)			\
-	EXT3_SB(sb)->s_es->s_feature_incompat |= cpu_to_le32(mask)
-#define EXT3_CLEAR_COMPAT_FEATURE(sb,mask)			\
-	EXT3_SB(sb)->s_es->s_feature_compat &= ~cpu_to_le32(mask)
-#define EXT3_CLEAR_RO_COMPAT_FEATURE(sb,mask)			\
-	EXT3_SB(sb)->s_es->s_feature_ro_compat &= ~cpu_to_le32(mask)
-#define EXT3_CLEAR_INCOMPAT_FEATURE(sb,mask)			\
-	EXT3_SB(sb)->s_es->s_feature_incompat &= ~cpu_to_le32(mask)
-
-#define EXT3_FEATURE_COMPAT_DIR_PREALLOC	0x0001
-#define EXT3_FEATURE_COMPAT_IMAGIC_INODES	0x0002
-#define EXT3_FEATURE_COMPAT_HAS_JOURNAL		0x0004
-#define EXT3_FEATURE_COMPAT_EXT_ATTR		0x0008
-#define EXT3_FEATURE_COMPAT_RESIZE_INODE	0x0010
-#define EXT3_FEATURE_COMPAT_DIR_INDEX		0x0020
-
-#define EXT3_FEATURE_RO_COMPAT_SPARSE_SUPER	0x0001
-#define EXT3_FEATURE_RO_COMPAT_LARGE_FILE	0x0002
-#define EXT3_FEATURE_RO_COMPAT_BTREE_DIR	0x0004
-
-#define EXT3_FEATURE_INCOMPAT_COMPRESSION	0x0001
-#define EXT3_FEATURE_INCOMPAT_FILETYPE		0x0002
-#define EXT3_FEATURE_INCOMPAT_RECOVER		0x0004 /* Needs recovery */
-#define EXT3_FEATURE_INCOMPAT_JOURNAL_DEV	0x0008 /* Journal device */
-#define EXT3_FEATURE_INCOMPAT_META_BG		0x0010
-
-#define EXT3_FEATURE_COMPAT_SUPP	EXT2_FEATURE_COMPAT_EXT_ATTR
-#define EXT3_FEATURE_INCOMPAT_SUPP	(EXT3_FEATURE_INCOMPAT_FILETYPE| \
-					 EXT3_FEATURE_INCOMPAT_RECOVER| \
-					 EXT3_FEATURE_INCOMPAT_META_BG)
-#define EXT3_FEATURE_RO_COMPAT_SUPP	(EXT3_FEATURE_RO_COMPAT_SPARSE_SUPER| \
-					 EXT3_FEATURE_RO_COMPAT_LARGE_FILE| \
-					 EXT3_FEATURE_RO_COMPAT_BTREE_DIR)
+#define EXT4_HAS_COMPAT_FEATURE(sb,mask)			\
+	( EXT4_SB(sb)->s_es->s_feature_compat & cpu_to_le32(mask) )
+#define EXT4_HAS_RO_COMPAT_FEATURE(sb,mask)			\
+	( EXT4_SB(sb)->s_es->s_feature_ro_compat & cpu_to_le32(mask) )
+#define EXT4_HAS_INCOMPAT_FEATURE(sb,mask)			\
+	( EXT4_SB(sb)->s_es->s_feature_incompat & cpu_to_le32(mask) )
+#define EXT4_SET_COMPAT_FEATURE(sb,mask)			\
+	EXT4_SB(sb)->s_es->s_feature_compat |= cpu_to_le32(mask)
+#define EXT4_SET_RO_COMPAT_FEATURE(sb,mask)			\
+	EXT4_SB(sb)->s_es->s_feature_ro_compat |= cpu_to_le32(mask)
+#define EXT4_SET_INCOMPAT_FEATURE(sb,mask)			\
+	EXT4_SB(sb)->s_es->s_feature_incompat |= cpu_to_le32(mask)
+#define EXT4_CLEAR_COMPAT_FEATURE(sb,mask)			\
+	EXT4_SB(sb)->s_es->s_feature_compat &= ~cpu_to_le32(mask)
+#define EXT4_CLEAR_RO_COMPAT_FEATURE(sb,mask)			\
+	EXT4_SB(sb)->s_es->s_feature_ro_compat &= ~cpu_to_le32(mask)
+#define EXT4_CLEAR_INCOMPAT_FEATURE(sb,mask)			\
+	EXT4_SB(sb)->s_es->s_feature_incompat &= ~cpu_to_le32(mask)
+
+#define EXT4_FEATURE_COMPAT_DIR_PREALLOC	0x0001
+#define EXT4_FEATURE_COMPAT_IMAGIC_INODES	0x0002
+#define EXT4_FEATURE_COMPAT_HAS_JOURNAL		0x0004
+#define EXT4_FEATURE_COMPAT_EXT_ATTR		0x0008
+#define EXT4_FEATURE_COMPAT_RESIZE_INODE	0x0010
+#define EXT4_FEATURE_COMPAT_DIR_INDEX		0x0020
+
+#define EXT4_FEATURE_RO_COMPAT_SPARSE_SUPER	0x0001
+#define EXT4_FEATURE_RO_COMPAT_LARGE_FILE	0x0002
+#define EXT4_FEATURE_RO_COMPAT_BTREE_DIR	0x0004
+
+#define EXT4_FEATURE_INCOMPAT_COMPRESSION	0x0001
+#define EXT4_FEATURE_INCOMPAT_FILETYPE		0x0002
+#define EXT4_FEATURE_INCOMPAT_RECOVER		0x0004 /* Needs recovery */
+#define EXT4_FEATURE_INCOMPAT_JOURNAL_DEV	0x0008 /* Journal device */
+#define EXT4_FEATURE_INCOMPAT_META_BG		0x0010
+
+#define EXT4_FEATURE_COMPAT_SUPP	EXT2_FEATURE_COMPAT_EXT_ATTR
+#define EXT4_FEATURE_INCOMPAT_SUPP	(EXT4_FEATURE_INCOMPAT_FILETYPE| \
+					 EXT4_FEATURE_INCOMPAT_RECOVER| \
+					 EXT4_FEATURE_INCOMPAT_META_BG)
+#define EXT4_FEATURE_RO_COMPAT_SUPP	(EXT4_FEATURE_RO_COMPAT_SPARSE_SUPER| \
+					 EXT4_FEATURE_RO_COMPAT_LARGE_FILE| \
+					 EXT4_FEATURE_RO_COMPAT_BTREE_DIR)
 
 /*
  * Default values for user and/or group using reserved blocks
  */
-#define	EXT3_DEF_RESUID		0
-#define	EXT3_DEF_RESGID		0
+#define	EXT4_DEF_RESUID		0
+#define	EXT4_DEF_RESGID		0
 
 /*
  * Default mount options
  */
-#define EXT3_DEFM_DEBUG		0x0001
-#define EXT3_DEFM_BSDGROUPS	0x0002
-#define EXT3_DEFM_XATTR_USER	0x0004
-#define EXT3_DEFM_ACL		0x0008
-#define EXT3_DEFM_UID16		0x0010
-#define EXT3_DEFM_JMODE		0x0060
-#define EXT3_DEFM_JMODE_DATA	0x0020
-#define EXT3_DEFM_JMODE_ORDERED	0x0040
-#define EXT3_DEFM_JMODE_WBACK	0x0060
+#define EXT4_DEFM_DEBUG		0x0001
+#define EXT4_DEFM_BSDGROUPS	0x0002
+#define EXT4_DEFM_XATTR_USER	0x0004
+#define EXT4_DEFM_ACL		0x0008
+#define EXT4_DEFM_UID16		0x0010
+#define EXT4_DEFM_JMODE		0x0060
+#define EXT4_DEFM_JMODE_DATA	0x0020
+#define EXT4_DEFM_JMODE_ORDERED	0x0040
+#define EXT4_DEFM_JMODE_WBACK	0x0060
 
 /*
  * Structure of a directory entry
  */
-#define EXT3_NAME_LEN 255
+#define EXT4_NAME_LEN 255
 
-struct ext3_dir_entry {
+struct ext4_dir_entry {
 	__le32	inode;			/* Inode number */
 	__le16	rec_len;		/* Directory entry length */
 	__le16	name_len;		/* Name length */
-	char	name[EXT3_NAME_LEN];	/* File name */
+	char	name[EXT4_NAME_LEN];	/* File name */
 };
 
 /*
- * The new version of the directory entry.  Since EXT3 structures are
+ * The new version of the directory entry.  Since EXT4 structures are
  * stored in intel byte order, and the name_len field could never be
  * bigger than 255 chars, it's safe to reclaim the extra byte for the
  * file_type field.
  */
-struct ext3_dir_entry_2 {
+struct ext4_dir_entry_2 {
 	__le32	inode;			/* Inode number */
 	__le16	rec_len;		/* Directory entry length */
 	__u8	name_len;		/* Name length */
 	__u8	file_type;
-	char	name[EXT3_NAME_LEN];	/* File name */
+	char	name[EXT4_NAME_LEN];	/* File name */
 };
 
 /*
- * Ext3 directory file types.  Only the low 3 bits are used.  The
+ * Ext4 directory file types.  Only the low 3 bits are used.  The
  * other bits are reserved for now.
  */
-#define EXT3_FT_UNKNOWN		0
-#define EXT3_FT_REG_FILE	1
-#define EXT3_FT_DIR		2
-#define EXT3_FT_CHRDEV		3
-#define EXT3_FT_BLKDEV		4
-#define EXT3_FT_FIFO		5
-#define EXT3_FT_SOCK		6
-#define EXT3_FT_SYMLINK		7
+#define EXT4_FT_UNKNOWN		0
+#define EXT4_FT_REG_FILE	1
+#define EXT4_FT_DIR		2
+#define EXT4_FT_CHRDEV		3
+#define EXT4_FT_BLKDEV		4
+#define EXT4_FT_FIFO		5
+#define EXT4_FT_SOCK		6
+#define EXT4_FT_SYMLINK		7
 
-#define EXT3_FT_MAX		8
+#define EXT4_FT_MAX		8
 
 /*
- * EXT3_DIR_PAD defines the directory entries boundaries
+ * EXT4_DIR_PAD defines the directory entries boundaries
  *
  * NOTE: It must be a multiple of 4
  */
-#define EXT3_DIR_PAD			4
-#define EXT3_DIR_ROUND			(EXT3_DIR_PAD - 1)
-#define EXT3_DIR_REC_LEN(name_len)	(((name_len) + 8 + EXT3_DIR_ROUND) & \
-					 ~EXT3_DIR_ROUND)
+#define EXT4_DIR_PAD			4
+#define EXT4_DIR_ROUND			(EXT4_DIR_PAD - 1)
+#define EXT4_DIR_REC_LEN(name_len)	(((name_len) + 8 + EXT4_DIR_ROUND) & \
+					 ~EXT4_DIR_ROUND)
 /*
  * Hash Tree Directory indexing
  * (c) Daniel Phillips, 2001
  */
 
-#ifdef CONFIG_EXT3_INDEX
-  #define is_dx(dir) (EXT3_HAS_COMPAT_FEATURE(dir->i_sb, \
-					      EXT3_FEATURE_COMPAT_DIR_INDEX) && \
-		      (EXT3_I(dir)->i_flags & EXT3_INDEX_FL))
-#define EXT3_DIR_LINK_MAX(dir) (!is_dx(dir) && (dir)->i_nlink >= EXT3_LINK_MAX)
-#define EXT3_DIR_LINK_EMPTY(dir) ((dir)->i_nlink == 2 || (dir)->i_nlink == 1)
+#ifdef CONFIG_EXT4_INDEX
+  #define is_dx(dir) (EXT4_HAS_COMPAT_FEATURE(dir->i_sb, \
+					      EXT4_FEATURE_COMPAT_DIR_INDEX) && \
+		      (EXT4_I(dir)->i_flags & EXT4_INDEX_FL))
+#define EXT4_DIR_LINK_MAX(dir) (!is_dx(dir) && (dir)->i_nlink >= EXT4_LINK_MAX)
+#define EXT4_DIR_LINK_EMPTY(dir) ((dir)->i_nlink == 2 || (dir)->i_nlink == 1)
 #else
   #define is_dx(dir) 0
-#define EXT3_DIR_LINK_MAX(dir) ((dir)->i_nlink >= EXT3_LINK_MAX)
-#define EXT3_DIR_LINK_EMPTY(dir) ((dir)->i_nlink == 2)
+#define EXT4_DIR_LINK_MAX(dir) ((dir)->i_nlink >= EXT4_LINK_MAX)
+#define EXT4_DIR_LINK_EMPTY(dir) ((dir)->i_nlink == 2)
 #endif
 
 /* Legal values for the dx_root hash_version field: */
@@ -694,10 +694,10 @@ struct dx_hash_info
 	u32		*seed;
 };
 
-#define EXT3_HTREE_EOF	0x7fffffff
+#define EXT4_HTREE_EOF	0x7fffffff
 
 /*
- * Control parameters used by ext3_htree_next_block
+ * Control parameters used by ext4_htree_next_block
  */
 #define HASH_NB_ALWAYS		1
 
@@ -705,16 +705,16 @@ struct dx_hash_info
 /*
  * Describe an inode's exact location on disk and in memory
  */
-struct ext3_iloc
+struct ext4_iloc
 {
 	struct buffer_head *bh;
 	unsigned long offset;
 	unsigned long block_group;
 };
 
-static inline struct ext3_inode *ext3_raw_inode(struct ext3_iloc *iloc)
+static inline struct ext4_inode *ext4_raw_inode(struct ext4_iloc *iloc)
 {
-	return (struct ext3_inode *) (iloc->bh->b_data + iloc->offset);
+	return (struct ext4_inode *) (iloc->bh->b_data + iloc->offset);
 }
 
 /*
@@ -733,11 +733,11 @@ struct dir_private_info {
 };
 
 /* calculate the first block number of the group */
-static inline ext3_fsblk_t
-ext3_group_first_block_no(struct super_block *sb, unsigned long group_no)
+static inline ext4_fsblk_t
+ext4_group_first_block_no(struct super_block *sb, unsigned long group_no)
 {
-	return group_no * (ext3_fsblk_t)EXT3_BLOCKS_PER_GROUP(sb) +
-		le32_to_cpu(EXT3_SB(sb)->s_es->s_first_data_block);
+	return group_no * (ext4_fsblk_t)EXT4_BLOCKS_PER_GROUP(sb) +
+		le32_to_cpu(EXT4_SB(sb)->s_es->s_first_data_block);
 }
 
 /*
@@ -751,113 +751,113 @@ ext3_group_first_block_no(struct super_block *sb, unsigned long group_no)
 
 /*
  * Ok, these declarations are also in <linux/kernel.h> but none of the
- * ext3 source programs needs to include it so they are duplicated here.
+ * ext4 source programs needs to include it so they are duplicated here.
  */
 # define NORET_TYPE    /**/
 # define ATTRIB_NORET  __attribute__((noreturn))
 # define NORET_AND     noreturn,
 
 /* balloc.c */
-extern int ext3_bg_has_super(struct super_block *sb, int group);
-extern unsigned long ext3_bg_num_gdb(struct super_block *sb, int group);
-extern ext3_fsblk_t ext3_new_block (handle_t *handle, struct inode *inode,
-			ext3_fsblk_t goal, int *errp);
-extern ext3_fsblk_t ext3_new_blocks (handle_t *handle, struct inode *inode,
-			ext3_fsblk_t goal, unsigned long *count, int *errp);
-extern void ext3_free_blocks (handle_t *handle, struct inode *inode,
-			ext3_fsblk_t block, unsigned long count);
-extern void ext3_free_blocks_sb (handle_t *handle, struct super_block *sb,
-				 ext3_fsblk_t block, unsigned long count,
+extern int ext4_bg_has_super(struct super_block *sb, int group);
+extern unsigned long ext4_bg_num_gdb(struct super_block *sb, int group);
+extern ext4_fsblk_t ext4_new_block (handle_t *handle, struct inode *inode,
+			ext4_fsblk_t goal, int *errp);
+extern ext4_fsblk_t ext4_new_blocks (handle_t *handle, struct inode *inode,
+			ext4_fsblk_t goal, unsigned long *count, int *errp);
+extern void ext4_free_blocks (handle_t *handle, struct inode *inode,
+			ext4_fsblk_t block, unsigned long count);
+extern void ext4_free_blocks_sb (handle_t *handle, struct super_block *sb,
+				 ext4_fsblk_t block, unsigned long count,
 				unsigned long *pdquot_freed_blocks);
-extern ext3_fsblk_t ext3_count_free_blocks (struct super_block *);
-extern void ext3_check_blocks_bitmap (struct super_block *);
-extern struct ext3_group_desc * ext3_get_group_desc(struct super_block * sb,
+extern ext4_fsblk_t ext4_count_free_blocks (struct super_block *);
+extern void ext4_check_blocks_bitmap (struct super_block *);
+extern struct ext4_group_desc * ext4_get_group_desc(struct super_block * sb,
 						    unsigned int block_group,
 						    struct buffer_head ** bh);
-extern int ext3_should_retry_alloc(struct super_block *sb, int *retries);
-extern void ext3_init_block_alloc_info(struct inode *);
-extern void ext3_rsv_window_add(struct super_block *sb, struct ext3_reserve_window_node *rsv);
+extern int ext4_should_retry_alloc(struct super_block *sb, int *retries);
+extern void ext4_init_block_alloc_info(struct inode *);
+extern void ext4_rsv_window_add(struct super_block *sb, struct ext4_reserve_window_node *rsv);
 
 /* dir.c */
-extern int ext3_check_dir_entry(const char *, struct inode *,
-				struct ext3_dir_entry_2 *,
+extern int ext4_check_dir_entry(const char *, struct inode *,
+				struct ext4_dir_entry_2 *,
 				struct buffer_head *, unsigned long);
-extern int ext3_htree_store_dirent(struct file *dir_file, __u32 hash,
+extern int ext4_htree_store_dirent(struct file *dir_file, __u32 hash,
 				    __u32 minor_hash,
-				    struct ext3_dir_entry_2 *dirent);
-extern void ext3_htree_free_dir_info(struct dir_private_info *p);
+				    struct ext4_dir_entry_2 *dirent);
+extern void ext4_htree_free_dir_info(struct dir_private_info *p);
 
 /* fsync.c */
-extern int ext3_sync_file (struct file *, struct dentry *, int);
+extern int ext4_sync_file (struct file *, struct dentry *, int);
 
 /* hash.c */
-extern int ext3fs_dirhash(const char *name, int len, struct
+extern int ext4fs_dirhash(const char *name, int len, struct
 			  dx_hash_info *hinfo);
 
 /* ialloc.c */
-extern struct inode * ext3_new_inode (handle_t *, struct inode *, int);
-extern void ext3_free_inode (handle_t *, struct inode *);
-extern struct inode * ext3_orphan_get (struct super_block *, unsigned long);
-extern unsigned long ext3_count_free_inodes (struct super_block *);
-extern unsigned long ext3_count_dirs (struct super_block *);
-extern void ext3_check_inodes_bitmap (struct super_block *);
-extern unsigned long ext3_count_free (struct buffer_head *, unsigned);
+extern struct inode * ext4_new_inode (handle_t *, struct inode *, int);
+extern void ext4_free_inode (handle_t *, struct inode *);
+extern struct inode * ext4_orphan_get (struct super_block *, unsigned long);
+extern unsigned long ext4_count_free_inodes (struct super_block *);
+extern unsigned long ext4_count_dirs (struct super_block *);
+extern void ext4_check_inodes_bitmap (struct super_block *);
+extern unsigned long ext4_count_free (struct buffer_head *, unsigned);
 
 
 /* inode.c */
-int ext3_forget(handle_t *handle, int is_metadata, struct inode *inode,
-		struct buffer_head *bh, ext3_fsblk_t blocknr);
-struct buffer_head * ext3_getblk (handle_t *, struct inode *, long, int, int *);
-struct buffer_head * ext3_bread (handle_t *, struct inode *, int, int, int *);
-int ext3_get_blocks_handle(handle_t *handle, struct inode *inode,
+int ext4_forget(handle_t *handle, int is_metadata, struct inode *inode,
+		struct buffer_head *bh, ext4_fsblk_t blocknr);
+struct buffer_head * ext4_getblk (handle_t *, struct inode *, long, int, int *);
+struct buffer_head * ext4_bread (handle_t *, struct inode *, int, int, int *);
+int ext4_get_blocks_handle(handle_t *handle, struct inode *inode,
 	sector_t iblock, unsigned long maxblocks, struct buffer_head *bh_result,
 	int create, int extend_disksize);
 
-extern void ext3_read_inode (struct inode *);
-extern int  ext3_write_inode (struct inode *, int);
-extern int  ext3_setattr (struct dentry *, struct iattr *);
-extern void ext3_delete_inode (struct inode *);
-extern int  ext3_sync_inode (handle_t *, struct inode *);
-extern void ext3_discard_reservation (struct inode *);
-extern void ext3_dirty_inode(struct inode *);
-extern int ext3_change_inode_journal_flag(struct inode *, int);
-extern int ext3_get_inode_loc(struct inode *, struct ext3_iloc *);
-extern void ext3_truncate (struct inode *);
-extern void ext3_set_inode_flags(struct inode *);
-extern void ext3_set_aops(struct inode *inode);
+extern void ext4_read_inode (struct inode *);
+extern int  ext4_write_inode (struct inode *, int);
+extern int  ext4_setattr (struct dentry *, struct iattr *);
+extern void ext4_delete_inode (struct inode *);
+extern int  ext4_sync_inode (handle_t *, struct inode *);
+extern void ext4_discard_reservation (struct inode *);
+extern void ext4_dirty_inode(struct inode *);
+extern int ext4_change_inode_journal_flag(struct inode *, int);
+extern int ext4_get_inode_loc(struct inode *, struct ext4_iloc *);
+extern void ext4_truncate (struct inode *);
+extern void ext4_set_inode_flags(struct inode *);
+extern void ext4_set_aops(struct inode *inode);
 
 /* ioctl.c */
-extern int ext3_ioctl (struct inode *, struct file *, unsigned int,
+extern int ext4_ioctl (struct inode *, struct file *, unsigned int,
 		       unsigned long);
-extern long ext3_compat_ioctl (struct file *, unsigned int, unsigned long);
+extern long ext4_compat_ioctl (struct file *, unsigned int, unsigned long);
 
 /* namei.c */
-extern int ext3_orphan_add(handle_t *, struct inode *);
-extern int ext3_orphan_del(handle_t *, struct inode *);
-extern int ext3_htree_fill_tree(struct file *dir_file, __u32 start_hash,
+extern int ext4_orphan_add(handle_t *, struct inode *);
+extern int ext4_orphan_del(handle_t *, struct inode *);
+extern int ext4_htree_fill_tree(struct file *dir_file, __u32 start_hash,
 				__u32 start_minor_hash, __u32 *next_hash);
 
 /* resize.c */
-extern int ext3_group_add(struct super_block *sb,
-				struct ext3_new_group_data *input);
-extern int ext3_group_extend(struct super_block *sb,
-				struct ext3_super_block *es,
-				ext3_fsblk_t n_blocks_count);
+extern int ext4_group_add(struct super_block *sb,
+				struct ext4_new_group_data *input);
+extern int ext4_group_extend(struct super_block *sb,
+				struct ext4_super_block *es,
+				ext4_fsblk_t n_blocks_count);
 
 /* super.c */
-extern void ext3_error (struct super_block *, const char *, const char *, ...)
+extern void ext4_error (struct super_block *, const char *, const char *, ...)
 	__attribute__ ((format (printf, 3, 4)));
-extern void __ext3_std_error (struct super_block *, const char *, int);
-extern void ext3_abort (struct super_block *, const char *, const char *, ...)
+extern void __ext4_std_error (struct super_block *, const char *, int);
+extern void ext4_abort (struct super_block *, const char *, const char *, ...)
 	__attribute__ ((format (printf, 3, 4)));
-extern void ext3_warning (struct super_block *, const char *, const char *, ...)
+extern void ext4_warning (struct super_block *, const char *, const char *, ...)
 	__attribute__ ((format (printf, 3, 4)));
-extern void ext3_update_dynamic_rev (struct super_block *sb);
+extern void ext4_update_dynamic_rev (struct super_block *sb);
 
-#define ext3_std_error(sb, errno)				\
+#define ext4_std_error(sb, errno)				\
 do {								\
 	if ((errno))						\
-		__ext3_std_error((sb), __FUNCTION__, (errno));	\
+		__ext4_std_error((sb), __FUNCTION__, (errno));	\
 } while (0)
 
 /*
@@ -865,21 +865,21 @@ do {								\
  */
 
 /* dir.c */
-extern const struct file_operations ext3_dir_operations;
+extern const struct file_operations ext4_dir_operations;
 
 /* file.c */
-extern struct inode_operations ext3_file_inode_operations;
-extern const struct file_operations ext3_file_operations;
+extern struct inode_operations ext4_file_inode_operations;
+extern const struct file_operations ext4_file_operations;
 
 /* namei.c */
-extern struct inode_operations ext3_dir_inode_operations;
-extern struct inode_operations ext3_special_inode_operations;
+extern struct inode_operations ext4_dir_inode_operations;
+extern struct inode_operations ext4_special_inode_operations;
 
 /* symlink.c */
-extern struct inode_operations ext3_symlink_inode_operations;
-extern struct inode_operations ext3_fast_symlink_inode_operations;
+extern struct inode_operations ext4_symlink_inode_operations;
+extern struct inode_operations ext4_fast_symlink_inode_operations;
 
 
 #endif	/* __KERNEL__ */
 
-#endif	/* _LINUX_EXT3_FS_H */
+#endif	/* _LINUX_EXT4_FS_H */