-Index: linux-stage/fs/ext3/ioctl.c
-===================================================================
---- linux-stage.orig/fs/ext3/ioctl.c 2006-07-16 13:55:31.000000000 +0800
-+++ linux-stage/fs/ext3/ioctl.c 2006-07-16 13:55:31.000000000 +0800
-@@ -135,6 +135,10 @@ flags_err:
- mutex_unlock(&inode->i_mutex);
- return err;
- }
-+ case EXT3_IOC_GET_EXTENTS:
-+ case EXT3_IOC_GET_TREE_STATS:
-+ case EXT3_IOC_GET_TREE_DEPTH:
-+ return ext3_ext_ioctl(inode, filp, cmd, arg);
- case EXT3_IOC_GETVERSION:
- case EXT3_IOC_GETVERSION_OLD:
- return put_user(inode->i_generation, (int __user *) arg);
-Index: linux-stage/include/linux/ext3_fs.h
-===================================================================
---- linux-stage.orig/include/linux/ext3_fs.h 2006-07-16 13:55:31.000000000 +0800
-+++ linux-stage/include/linux/ext3_fs.h 2006-07-16 14:10:21.000000000 +0800
-@@ -181,9 +181,10 @@ struct ext3_group_desc
- #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_EXTENTS_FL 0x00080000 /* Inode uses extents */
- #define EXT3_RESERVED_FL 0x80000000 /* reserved for ext3 lib */
-
--#define EXT3_FL_USER_VISIBLE 0x0003DFFF /* User visible flags */
-+#define EXT3_FL_USER_VISIBLE 0x000BDFFF /* User visible flags */
- #define EXT3_FL_USER_MODIFIABLE 0x000380FF /* User modifiable flags */
-
- /*
-@@ -233,6 +234,9 @@ struct ext3_new_group_data {
- #endif
- #define EXT3_IOC_GETRSVSZ _IOR('f', 5, long)
- #define EXT3_IOC_SETRSVSZ _IOW('f', 6, long)
-+#define EXT3_IOC_GET_EXTENTS _IOR('f', 7, long)
-+#define EXT3_IOC_GET_TREE_DEPTH _IOR('f', 8, long)
-+#define EXT3_IOC_GET_TREE_STATS _IOR('f', 9, long)
-
- /*
- * Mount options
-@@ -373,6 +377,8 @@ struct ext3_inode {
- #define EXT3_MOUNT_GRPQUOTA 0x200000 /* "old" group quota */
- #define EXT3_MOUNT_IOPEN 0x400000 /* Allow access via iopen */
- #define EXT3_MOUNT_IOPEN_NOPRIV 0x800000/* Make iopen world-readable */
-+#define EXT3_MOUNT_EXTENTS 0x1000000/* Extents support */
-+#define EXT3_MOUNT_EXTDEBUG 0x2000000/* Extents debug */
-
- /* Compatibility, for having both ext2_fs.h and ext3_fs.h included at once */
- #ifndef clear_opt
-@@ -563,11 +569,13 @@ static inline struct ext3_inode_info *EX
- #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_INCOMPAT_EXTENTS 0x0040 /* extents support */
-
- #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)
-+ EXT3_FEATURE_INCOMPAT_META_BG| \
-+ EXT3_FEATURE_INCOMPAT_EXTENTS)
- #define EXT3_FEATURE_RO_COMPAT_SUPP (EXT3_FEATURE_RO_COMPAT_SPARSE_SUPER| \
- EXT3_FEATURE_RO_COMPAT_LARGE_FILE| \
- EXT3_FEATURE_RO_COMPAT_BTREE_DIR)
-@@ -787,6 +795,9 @@ extern unsigned long ext3_count_free (st
-
-
- /* inode.c */
-+extern int ext3_block_truncate_page(handle_t *, struct page *,
-+ struct address_space *, loff_t);
-+extern int ext3_writepage_trans_blocks(struct inode *inode);
- 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 *);
-@@ -860,6 +870,16 @@ extern struct inode_operations ext3_spec
- extern struct inode_operations ext3_symlink_inode_operations;
- extern struct inode_operations ext3_fast_symlink_inode_operations;
-
-+/* extents.c */
-+extern int ext3_ext_writepage_trans_blocks(struct inode *, int);
-+extern int ext3_ext_get_block(handle_t *, struct inode *, long,
-+ struct buffer_head *, int, int);
-+extern void ext3_ext_truncate(struct inode *, struct page *);
-+extern void ext3_ext_init(struct super_block *);
-+extern void ext3_ext_release(struct super_block *);
-+extern void ext3_extents_initialize_blockmap(handle_t *, struct inode *);
-+extern int ext3_ext_ioctl(struct inode *inode, struct file *filp,
-+ unsigned int cmd, unsigned long arg);
-
- #endif /* __KERNEL__ */
-
-Index: linux-stage/include/linux/ext3_extents.h