diff --git a/Documentation/filesystems/ext4.txt b/Documentation/filesystems/ext4.txt
index 104322b..34ea4f1 100644
--- a/Documentation/filesystems/ext4.txt
+++ b/Documentation/filesystems/ext4.txt
@@ -200,12 +200,9 @@
 			table readahead algorithm will pre-read into
 			the buffer cache.  The default value is 32 blocks.
 
-nouser_xattr		Disables Extended User Attributes. If you have extended
-			attribute support enabled in the kernel configuration
-			(CONFIG_EXT4_FS_XATTR), extended attribute support
-			is enabled by default on mount. See the attr(5) manual
-			page and http://acl.bestbits.at/ for more information
-			about extended attributes.
+nouser_xattr		Disables Extended User Attributes.  See the
+			attr(5) manual page and http://acl.bestbits.at/
+			for more information about extended attributes.
 
 noacl			This option disables POSIX Access Control List
 			support. If ACL support is enabled in the kernel
diff --git a/fs/Kconfig b/fs/Kconfig
index f95ae3a..eaff24a 100644
--- a/fs/Kconfig
+++ b/fs/Kconfig
@@ -28,8 +28,8 @@
 	tristate
 	default y if EXT2_FS=y && EXT2_FS_XATTR
 	default y if EXT3_FS=y && EXT3_FS_XATTR
-	default y if EXT4_FS=y && EXT4_FS_XATTR
-	default m if EXT2_FS_XATTR || EXT3_FS_XATTR || EXT4_FS_XATTR
+	default y if EXT4_FS=y
+	default m if EXT2_FS_XATTR || EXT3_FS_XATTR || EXT4_FS
 
 source "fs/reiserfs/Kconfig"
 source "fs/jfs/Kconfig"
diff --git a/fs/ext4/Kconfig b/fs/ext4/Kconfig
index c22f170..0a475c8 100644
--- a/fs/ext4/Kconfig
+++ b/fs/ext4/Kconfig
@@ -39,22 +39,8 @@
 	  compiled kernel size by using one file system driver for
 	  ext2, ext3, and ext4 file systems.
 
-config EXT4_FS_XATTR
-	bool "Ext4 extended attributes"
-	depends on EXT4_FS
-	default y
-	help
-	  Extended attributes are name:value pairs associated with inodes by
-	  the kernel or by users (see the attr(5) manual page, or visit
-	  <http://acl.bestbits.at/> for details).
-
-	  If unsure, say N.
-
-	  You need this for POSIX ACL support on ext4.
-
 config EXT4_FS_POSIX_ACL
 	bool "Ext4 POSIX Access Control Lists"
-	depends on EXT4_FS_XATTR
 	select FS_POSIX_ACL
 	help
 	  POSIX Access Control Lists (ACLs) support permissions for users and
@@ -67,7 +53,6 @@
 
 config EXT4_FS_SECURITY
 	bool "Ext4 Security Labels"
-	depends on EXT4_FS_XATTR
 	help
 	  Security labels support alternative access control models
 	  implemented by security modules like SELinux.  This option
diff --git a/fs/ext4/Makefile b/fs/ext4/Makefile
index 56fd8f86..0310fec 100644
--- a/fs/ext4/Makefile
+++ b/fs/ext4/Makefile
@@ -7,8 +7,8 @@
 ext4-y	:= balloc.o bitmap.o dir.o file.o fsync.o ialloc.o inode.o page-io.o \
 		ioctl.o namei.o super.o symlink.o hash.o resize.o extents.o \
 		ext4_jbd2.o migrate.o mballoc.o block_validity.o move_extent.o \
-		mmp.o indirect.o
+		mmp.o indirect.o extents_status.o xattr.o xattr_user.o \
+		xattr_trusted.o inline.o
 
-ext4-$(CONFIG_EXT4_FS_XATTR)		+= xattr.o xattr_user.o xattr_trusted.o
 ext4-$(CONFIG_EXT4_FS_POSIX_ACL)	+= acl.o
 ext4-$(CONFIG_EXT4_FS_SECURITY)		+= xattr_security.o
diff --git a/fs/ext4/acl.c b/fs/ext4/acl.c
index d3c5b88..e6e0d98 100644
--- a/fs/ext4/acl.c
+++ b/fs/ext4/acl.c
@@ -423,8 +423,10 @@
 
 retry:
 	handle = ext4_journal_start(inode, EXT4_DATA_TRANS_BLOCKS(inode->i_sb));
-	if (IS_ERR(handle))
-		return PTR_ERR(handle);
+	if (IS_ERR(handle)) {
+		error = PTR_ERR(handle);
+		goto release_and_out;
+	}
 	error = ext4_set_acl(handle, inode, type, acl);
 	ext4_journal_stop(handle);
 	if (error == -ENOSPC && ext4_should_retry_alloc(inode->i_sb, &retries))
diff --git a/fs/ext4/dir.c b/fs/ext4/dir.c
index 8e07d2a..b8d877f 100644
--- a/fs/ext4/dir.c
+++ b/fs/ext4/dir.c
@@ -27,23 +27,11 @@
 #include <linux/slab.h>
 #include <linux/rbtree.h>
 #include "ext4.h"
-
-static unsigned char ext4_filetype_table[] = {
-	DT_UNKNOWN, DT_REG, DT_DIR, DT_CHR, DT_BLK, DT_FIFO, DT_SOCK, DT_LNK
-};
+#include "xattr.h"
 
 static int ext4_dx_readdir(struct file *filp,
 			   void *dirent, filldir_t filldir);
 
-static unsigned char get_dtype(struct super_block *sb, int filetype)
-{
-	if (!EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_FILETYPE) ||
-	    (filetype >= EXT4_FT_MAX))
-		return DT_UNKNOWN;
-
-	return (ext4_filetype_table[filetype]);
-}
-
 /**
  * Check if the given dir-inode refers to an htree-indexed directory
  * (or a directory which chould potentially get coverted to use htree
@@ -68,11 +56,14 @@
  * Return 0 if the directory entry is OK, and 1 if there is a problem
  *
  * Note: this is the opposite of what ext2 and ext3 historically returned...
+ *
+ * bh passed here can be an inode block or a dir data block, depending
+ * on the inode inline data flag.
  */
 int __ext4_check_dir_entry(const char *function, unsigned int line,
 			   struct inode *dir, struct file *filp,
 			   struct ext4_dir_entry_2 *de,
-			   struct buffer_head *bh,
+			   struct buffer_head *bh, char *buf, int size,
 			   unsigned int offset)
 {
 	const char *error_msg = NULL;
@@ -85,9 +76,8 @@
 		error_msg = "rec_len % 4 != 0";
 	else if (unlikely(rlen < EXT4_DIR_REC_LEN(de->name_len)))
 		error_msg = "rec_len is too small for name_len";
-	else if (unlikely(((char *) de - bh->b_data) + rlen >
-			  dir->i_sb->s_blocksize))
-		error_msg = "directory entry across blocks";
+	else if (unlikely(((char *) de - buf) + rlen > size))
+		error_msg = "directory entry across range";
 	else if (unlikely(le32_to_cpu(de->inode) >
 			le32_to_cpu(EXT4_SB(dir->i_sb)->s_es->s_inodes_count)))
 		error_msg = "inode out of bounds";
@@ -98,14 +88,14 @@
 		ext4_error_file(filp, function, line, bh->b_blocknr,
 				"bad entry in directory: %s - offset=%u(%u), "
 				"inode=%u, rec_len=%d, name_len=%d",
-				error_msg, (unsigned) (offset % bh->b_size),
+				error_msg, (unsigned) (offset % size),
 				offset, le32_to_cpu(de->inode),
 				rlen, de->name_len);
 	else
 		ext4_error_inode(dir, function, line, bh->b_blocknr,
 				"bad entry in directory: %s - offset=%u(%u), "
 				"inode=%u, rec_len=%d, name_len=%d",
-				error_msg, (unsigned) (offset % bh->b_size),
+				error_msg, (unsigned) (offset % size),
 				offset, le32_to_cpu(de->inode),
 				rlen, de->name_len);
 
@@ -125,6 +115,14 @@
 	int ret = 0;
 	int dir_has_error = 0;
 
+	if (ext4_has_inline_data(inode)) {
+		int has_inline_data = 1;
+		ret = ext4_read_inline_dir(filp, dirent, filldir,
+					   &has_inline_data);
+		if (has_inline_data)
+			return ret;
+	}
+
 	if (is_dx_dir(inode)) {
 		err = ext4_dx_readdir(filp, dirent, filldir);
 		if (err != ERR_BAD_DX_DIR) {
@@ -221,8 +219,9 @@
 		while (!error && filp->f_pos < inode->i_size
 		       && offset < sb->s_blocksize) {
 			de = (struct ext4_dir_entry_2 *) (bh->b_data + offset);
-			if (ext4_check_dir_entry(inode, filp, de,
-						 bh, offset)) {
+			if (ext4_check_dir_entry(inode, filp, de, bh,
+						 bh->b_data, bh->b_size,
+						 offset)) {
 				/*
 				 * On error, skip the f_pos to the next block
 				 */
diff --git a/fs/ext4/ext4.h b/fs/ext4/ext4.h
index df163da..8462eb3 100644
--- a/fs/ext4/ext4.h
+++ b/fs/ext4/ext4.h
@@ -57,6 +57,16 @@
 #define ext4_debug(fmt, ...)	no_printk(fmt, ##__VA_ARGS__)
 #endif
 
+/*
+ * Turn on EXT_DEBUG to get lots of info about extents operations.
+ */
+#define EXT_DEBUG__
+#ifdef EXT_DEBUG
+#define ext_debug(fmt, ...)	printk(fmt, ##__VA_ARGS__)
+#else
+#define ext_debug(fmt, ...)	no_printk(fmt, ##__VA_ARGS__)
+#endif
+
 #define EXT4_ERROR_INODE(inode, fmt, a...) \
 	ext4_error_inode((inode), __func__, __LINE__, 0, (fmt), ## a)
 
@@ -392,6 +402,7 @@
 #define EXT4_EXTENTS_FL			0x00080000 /* Inode uses extents */
 #define EXT4_EA_INODE_FL	        0x00200000 /* Inode used for large EA */
 #define EXT4_EOFBLOCKS_FL		0x00400000 /* Blocks allocated beyond EOF */
+#define EXT4_INLINE_DATA_FL		0x10000000 /* Inode has inline data. */
 #define EXT4_RESERVED_FL		0x80000000 /* reserved for ext4 lib */
 
 #define EXT4_FL_USER_VISIBLE		0x004BDFFF /* User visible flags */
@@ -448,28 +459,26 @@
 	EXT4_INODE_EXTENTS	= 19,	/* Inode uses extents */
 	EXT4_INODE_EA_INODE	= 21,	/* Inode used for large EA */
 	EXT4_INODE_EOFBLOCKS	= 22,	/* Blocks allocated beyond EOF */
+	EXT4_INODE_INLINE_DATA	= 28,	/* Data in inode. */
 	EXT4_INODE_RESERVED	= 31,	/* reserved for ext4 lib */
 };
 
-#define TEST_FLAG_VALUE(FLAG) (EXT4_##FLAG##_FL == (1 << EXT4_INODE_##FLAG))
-#define CHECK_FLAG_VALUE(FLAG) if (!TEST_FLAG_VALUE(FLAG)) { \
-	printk(KERN_EMERG "EXT4 flag fail: " #FLAG ": %d %d\n", \
-		EXT4_##FLAG##_FL, EXT4_INODE_##FLAG); BUG_ON(1); }
-
 /*
- * Since it's pretty easy to mix up bit numbers and hex values, and we
- * can't do a compile-time test for ENUM values, we use a run-time
- * test to make sure that EXT4_XXX_FL is consistent with respect to
- * EXT4_INODE_XXX.  If all is well the printk and BUG_ON will all drop
- * out so it won't cost any extra space in the compiled kernel image.
- * But it's important that these values are the same, since we are
- * using EXT4_INODE_XXX to test for the flag values, but EXT4_XX_FL
- * must be consistent with the values of FS_XXX_FL defined in
- * include/linux/fs.h and the on-disk values found in ext2, ext3, and
- * ext4 filesystems, and of course the values defined in e2fsprogs.
+ * Since it's pretty easy to mix up bit numbers and hex values, we use a
+ * build-time check to make sure that EXT4_XXX_FL is consistent with respect to
+ * EXT4_INODE_XXX. If all is well, the macros will be dropped, so, it won't cost
+ * any extra space in the compiled kernel image, otherwise, the build will fail.
+ * It's important that these values are the same, since we are using
+ * EXT4_INODE_XXX to test for flag values, but EXT4_XXX_FL must be consistent
+ * with the values of FS_XXX_FL defined in include/linux/fs.h and the on-disk
+ * values found in ext2, ext3 and ext4 filesystems, and of course the values
+ * defined in e2fsprogs.
  *
  * It's not paranoia if the Murphy's Law really *is* out to get you.  :-)
  */
+#define TEST_FLAG_VALUE(FLAG) (EXT4_##FLAG##_FL == (1 << EXT4_INODE_##FLAG))
+#define CHECK_FLAG_VALUE(FLAG) BUILD_BUG_ON(!TEST_FLAG_VALUE(FLAG))
+
 static inline void ext4_check_flag_values(void)
 {
 	CHECK_FLAG_VALUE(SECRM);
@@ -494,6 +503,7 @@
 	CHECK_FLAG_VALUE(EXTENTS);
 	CHECK_FLAG_VALUE(EA_INODE);
 	CHECK_FLAG_VALUE(EOFBLOCKS);
+	CHECK_FLAG_VALUE(INLINE_DATA);
 	CHECK_FLAG_VALUE(RESERVED);
 }
 
@@ -811,6 +821,8 @@
 	__u32		ec_len; /* must be 32bit to return holes */
 };
 
+#include "extents_status.h"
+
 /*
  * fourth extended file system inode data in memory
  */
@@ -833,7 +845,6 @@
 #endif
 	unsigned long	i_flags;
 
-#ifdef CONFIG_EXT4_FS_XATTR
 	/*
 	 * Extended attributes can be read independently of the main file
 	 * data. Taking i_mutex even when reading would cause contention
@@ -842,7 +853,6 @@
 	 * EAs.
 	 */
 	struct rw_semaphore xattr_sem;
-#endif
 
 	struct list_head i_orphan;	/* unlinked but open inodes */
 
@@ -888,6 +898,10 @@
 	struct list_head i_prealloc_list;
 	spinlock_t i_prealloc_lock;
 
+	/* extents status tree */
+	struct ext4_es_tree i_es_tree;
+	rwlock_t i_es_lock;
+
 	/* ialloc */
 	ext4_group_t	i_last_alloc_group;
 
@@ -902,6 +916,10 @@
 	/* on-disk additional length */
 	__u16 i_extra_isize;
 
+	/* Indicate the inline data space. */
+	u16 i_inline_off;
+	u16 i_inline_size;
+
 #ifdef CONFIG_QUOTA
 	/* quota space reservation, managed internally by quota code */
 	qsize_t i_reserved_quota;
@@ -1360,6 +1378,7 @@
 	EXT4_STATE_DELALLOC_RESERVED,	/* blks already reserved for delalloc */
 	EXT4_STATE_DIOREAD_LOCK,	/* Disable support for dio read
 					   nolocking */
+	EXT4_STATE_MAY_INLINE_DATA,	/* may have in-inode data */
 };
 
 #define EXT4_INODE_BIT_FNS(name, field, offset)				\
@@ -1481,7 +1500,7 @@
 #define EXT4_FEATURE_INCOMPAT_DIRDATA		0x1000 /* data in dirent */
 #define EXT4_FEATURE_INCOMPAT_BG_USE_META_CSUM	0x2000 /* use crc32c for bg */
 #define EXT4_FEATURE_INCOMPAT_LARGEDIR		0x4000 /* >2GB or 3-lvl htree */
-#define EXT4_FEATURE_INCOMPAT_INLINEDATA	0x8000 /* data in inode */
+#define EXT4_FEATURE_INCOMPAT_INLINE_DATA	0x8000 /* data in inode */
 
 #define EXT2_FEATURE_COMPAT_SUPP	EXT4_FEATURE_COMPAT_EXT_ATTR
 #define EXT2_FEATURE_INCOMPAT_SUPP	(EXT4_FEATURE_INCOMPAT_FILETYPE| \
@@ -1505,7 +1524,8 @@
 					 EXT4_FEATURE_INCOMPAT_EXTENTS| \
 					 EXT4_FEATURE_INCOMPAT_64BIT| \
 					 EXT4_FEATURE_INCOMPAT_FLEX_BG| \
-					 EXT4_FEATURE_INCOMPAT_MMP)
+					 EXT4_FEATURE_INCOMPAT_MMP |	\
+					 EXT4_FEATURE_INCOMPAT_INLINE_DATA)
 #define EXT4_FEATURE_RO_COMPAT_SUPP	(EXT4_FEATURE_RO_COMPAT_SPARSE_SUPER| \
 					 EXT4_FEATURE_RO_COMPAT_LARGE_FILE| \
 					 EXT4_FEATURE_RO_COMPAT_GDT_CSUM| \
@@ -1592,6 +1612,11 @@
 	__le32	det_checksum;		/* crc32c(uuid+inum+dirblock) */
 };
 
+#define EXT4_DIRENT_TAIL(block, blocksize) \
+	((struct ext4_dir_entry_tail *)(((void *)(block)) + \
+					((blocksize) - \
+					 sizeof(struct ext4_dir_entry_tail))))
+
 /*
  * Ext4 directory file types.  Only the low 3 bits are used.  The
  * other bits are reserved for now.
@@ -1936,14 +1961,42 @@
 extern int __ext4_check_dir_entry(const char *, unsigned int, struct inode *,
 				  struct file *,
 				  struct ext4_dir_entry_2 *,
-				  struct buffer_head *, unsigned int);
-#define ext4_check_dir_entry(dir, filp, de, bh, offset)			\
+				  struct buffer_head *, char *, int,
+				  unsigned int);
+#define ext4_check_dir_entry(dir, filp, de, bh, buf, size, offset)	\
 	unlikely(__ext4_check_dir_entry(__func__, __LINE__, (dir), (filp), \
-					(de), (bh), (offset)))
+					(de), (bh), (buf), (size), (offset)))
 extern int ext4_htree_store_dirent(struct file *dir_file, __u32 hash,
 				    __u32 minor_hash,
 				    struct ext4_dir_entry_2 *dirent);
 extern void ext4_htree_free_dir_info(struct dir_private_info *p);
+extern int ext4_find_dest_de(struct inode *dir, struct inode *inode,
+			     struct buffer_head *bh,
+			     void *buf, int buf_size,
+			     const char *name, int namelen,
+			     struct ext4_dir_entry_2 **dest_de);
+void ext4_insert_dentry(struct inode *inode,
+			struct ext4_dir_entry_2 *de,
+			int buf_size,
+			const char *name, int namelen);
+static inline void ext4_update_dx_flag(struct inode *inode)
+{
+	if (!EXT4_HAS_COMPAT_FEATURE(inode->i_sb,
+				     EXT4_FEATURE_COMPAT_DIR_INDEX))
+		ext4_clear_inode_flag(inode, EXT4_INODE_INDEX);
+}
+static unsigned char ext4_filetype_table[] = {
+	DT_UNKNOWN, DT_REG, DT_DIR, DT_CHR, DT_BLK, DT_FIFO, DT_SOCK, DT_LNK
+};
+
+static inline  unsigned char get_dtype(struct super_block *sb, int filetype)
+{
+	if (!EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_FILETYPE) ||
+	    (filetype >= EXT4_FT_MAX))
+		return DT_UNKNOWN;
+
+	return ext4_filetype_table[filetype];
+}
 
 /* fsync.c */
 extern int ext4_sync_file(struct file *, loff_t, loff_t, int);
@@ -1994,8 +2047,23 @@
 						ext4_lblk_t, int, int *);
 struct buffer_head *ext4_bread(handle_t *, struct inode *,
 						ext4_lblk_t, int, int *);
+int ext4_get_block_write(struct inode *inode, sector_t iblock,
+			 struct buffer_head *bh_result, int create);
 int ext4_get_block(struct inode *inode, sector_t iblock,
 				struct buffer_head *bh_result, int create);
+int ext4_da_get_block_prep(struct inode *inode, sector_t iblock,
+			   struct buffer_head *bh, int create);
+int ext4_walk_page_buffers(handle_t *handle,
+			   struct buffer_head *head,
+			   unsigned from,
+			   unsigned to,
+			   int *partial,
+			   int (*fn)(handle_t *handle,
+				     struct buffer_head *bh));
+int do_journal_get_write_access(handle_t *handle,
+				struct buffer_head *bh);
+#define FALL_BACK_TO_NONDELALLOC 1
+#define CONVERT_INLINE_DATA	 2
 
 extern struct inode *ext4_iget(struct super_block *, unsigned long);
 extern int  ext4_write_inode(struct inode *, struct writeback_control *);
@@ -2050,6 +2118,20 @@
 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);
+extern int search_dir(struct buffer_head *bh,
+		      char *search_buf,
+		      int buf_size,
+		      struct inode *dir,
+		      const struct qstr *d_name,
+		      unsigned int offset,
+		      struct ext4_dir_entry_2 **res_dir);
+extern int ext4_generic_delete_entry(handle_t *handle,
+				     struct inode *dir,
+				     struct ext4_dir_entry_2 *de_del,
+				     struct buffer_head *bh,
+				     void *entry_buf,
+				     int buf_size,
+				     int csum_size);
 
 /* resize.c */
 extern int ext4_group_add(struct super_block *sb,
@@ -2376,6 +2458,15 @@
 extern const struct inode_operations ext4_dir_inode_operations;
 extern const struct inode_operations ext4_special_inode_operations;
 extern struct dentry *ext4_get_parent(struct dentry *child);
+extern struct ext4_dir_entry_2 *ext4_init_dot_dotdot(struct inode *inode,
+				 struct ext4_dir_entry_2 *de,
+				 int blocksize, int csum_size,
+				 unsigned int parent_ino, int dotdot_real_len);
+extern void initialize_dirent_tail(struct ext4_dir_entry_tail *t,
+				   unsigned int blocksize);
+extern int ext4_handle_dirty_dirent_node(handle_t *handle,
+					 struct inode *inode,
+					 struct buffer_head *bh);
 
 /* symlink.c */
 extern const struct inode_operations ext4_symlink_inode_operations;
@@ -2393,6 +2484,9 @@
 			       struct inode *, __le32 *, unsigned int);
 
 /* extents.c */
+struct ext4_ext_path;
+struct ext4_extent;
+
 extern int ext4_ext_tree_init(handle_t *handle, struct inode *);
 extern int ext4_ext_writepage_trans_blocks(struct inode *, int);
 extern int ext4_ext_index_trans_blocks(struct inode *inode, int nrblocks,
@@ -2410,8 +2504,27 @@
 			  ssize_t len);
 extern int ext4_map_blocks(handle_t *handle, struct inode *inode,
 			   struct ext4_map_blocks *map, int flags);
+extern int ext4_ext_calc_metadata_amount(struct inode *inode,
+					 ext4_lblk_t lblocks);
+extern int ext4_extent_tree_init(handle_t *, struct inode *);
+extern int ext4_ext_calc_credits_for_single_extent(struct inode *inode,
+						   int num,
+						   struct ext4_ext_path *path);
+extern int ext4_can_extents_be_merged(struct inode *inode,
+				      struct ext4_extent *ex1,
+				      struct ext4_extent *ex2);
+extern int ext4_ext_insert_extent(handle_t *, struct inode *,
+				  struct ext4_ext_path *,
+				  struct ext4_extent *, int);
+extern struct ext4_ext_path *ext4_ext_find_extent(struct inode *, ext4_lblk_t,
+						  struct ext4_ext_path *);
+extern void ext4_ext_drop_refs(struct ext4_ext_path *);
+extern int ext4_ext_check_inode(struct inode *inode);
+extern int ext4_find_delalloc_cluster(struct inode *inode, ext4_lblk_t lblk);
 extern int ext4_fiemap(struct inode *inode, struct fiemap_extent_info *fieinfo,
 			__u64 start, __u64 len);
+
+
 /* move_extent.c */
 extern int ext4_move_extents(struct file *o_filp, struct file *d_filp,
 			     __u64 start_orig, __u64 start_donor,
@@ -2445,14 +2558,10 @@
 				 * never, ever appear in a buffer_head's state
 				 * flag. See EXT4_MAP_FROM_CLUSTER to see where
 				 * this is used. */
-	BH_Da_Mapped,	/* Delayed allocated block that now has a mapping. This
-			 * flag is set when ext4_map_blocks is called on a
-			 * delayed allocated block to get its real mapping. */
 };
 
 BUFFER_FNS(Uninit, uninit)
 TAS_BUFFER_FNS(Uninit, uninit)
-BUFFER_FNS(Da_Mapped, da_mapped)
 
 /*
  * Add new method to test whether block and inode bitmaps are properly
@@ -2503,6 +2612,4 @@
 
 #endif	/* __KERNEL__ */
 
-#include "ext4_extents.h"
-
 #endif	/* _EXT4_H */
diff --git a/fs/ext4/ext4_extents.h b/fs/ext4/ext4_extents.h
index cb1b2c9..487fda1 100644
--- a/fs/ext4/ext4_extents.h
+++ b/fs/ext4/ext4_extents.h
@@ -43,16 +43,6 @@
 #define CHECK_BINSEARCH__
 
 /*
- * Turn on EXT_DEBUG to get lots of info about extents operations.
- */
-#define EXT_DEBUG__
-#ifdef EXT_DEBUG
-#define ext_debug(fmt, ...)	printk(fmt, ##__VA_ARGS__)
-#else
-#define ext_debug(fmt, ...)	no_printk(fmt, ##__VA_ARGS__)
-#endif
-
-/*
  * If EXT_STATS is defined then stats numbers are collected.
  * These number will be displayed at umount time.
  */
@@ -144,20 +134,6 @@
  */
 
 /*
- * to be called by ext4_ext_walk_space()
- * negative retcode - error
- * positive retcode - signal for ext4_ext_walk_space(), see below
- * callback must return valid extent (passed or newly created)
- */
-typedef int (*ext_prepare_callback)(struct inode *, ext4_lblk_t,
-					struct ext4_ext_cache *,
-					struct ext4_extent *, void *);
-
-#define EXT_CONTINUE   0
-#define EXT_BREAK      1
-#define EXT_REPEAT     2
-
-/*
  * Maximum number of logical blocks in a file; ext4_extent's ee_block is
  * __le32.
  */
@@ -300,21 +276,5 @@
 				     0xffff);
 }
 
-extern int ext4_ext_calc_metadata_amount(struct inode *inode,
-					 ext4_lblk_t lblocks);
-extern int ext4_extent_tree_init(handle_t *, struct inode *);
-extern int ext4_ext_calc_credits_for_single_extent(struct inode *inode,
-						   int num,
-						   struct ext4_ext_path *path);
-extern int ext4_can_extents_be_merged(struct inode *inode,
-				      struct ext4_extent *ex1,
-				      struct ext4_extent *ex2);
-extern int ext4_ext_insert_extent(handle_t *, struct inode *, struct ext4_ext_path *, struct ext4_extent *, int);
-extern struct ext4_ext_path *ext4_ext_find_extent(struct inode *, ext4_lblk_t,
-							struct ext4_ext_path *);
-extern void ext4_ext_drop_refs(struct ext4_ext_path *);
-extern int ext4_ext_check_inode(struct inode *inode);
-extern int ext4_find_delalloc_cluster(struct inode *inode, ext4_lblk_t lblk,
-				      int search_hint_reverse);
 #endif /* _EXT4_EXTENTS */
 
diff --git a/fs/ext4/ext4_jbd2.h b/fs/ext4/ext4_jbd2.h
index 56d258c..7177f9b 100644
--- a/fs/ext4/ext4_jbd2.h
+++ b/fs/ext4/ext4_jbd2.h
@@ -254,13 +254,6 @@
 		handle->h_sync = 1;
 }
 
-static inline void ext4_handle_release_buffer(handle_t *handle,
-						struct buffer_head *bh)
-{
-	if (ext4_handle_valid(handle))
-		jbd2_journal_release_buffer(handle, bh);
-}
-
 static inline int ext4_handle_is_aborted(handle_t *handle)
 {
 	if (ext4_handle_valid(handle))
diff --git a/fs/ext4/extents.c b/fs/ext4/extents.c
index 7011ac9..26af228 100644
--- a/fs/ext4/extents.c
+++ b/fs/ext4/extents.c
@@ -41,6 +41,8 @@
 #include <asm/uaccess.h>
 #include <linux/fiemap.h>
 #include "ext4_jbd2.h"
+#include "ext4_extents.h"
+#include "xattr.h"
 
 #include <trace/events/ext4.h>
 
@@ -109,6 +111,9 @@
 			     int split_flag,
 			     int flags);
 
+static int ext4_find_delayed_extent(struct inode *inode,
+				    struct ext4_ext_cache *newex);
+
 static int ext4_ext_truncate_extend_restart(handle_t *handle,
 					    struct inode *inode,
 					    int needed)
@@ -1959,27 +1964,33 @@
 	return err;
 }
 
-static int ext4_ext_walk_space(struct inode *inode, ext4_lblk_t block,
-			       ext4_lblk_t num, ext_prepare_callback func,
-			       void *cbdata)
+static int ext4_fill_fiemap_extents(struct inode *inode,
+				    ext4_lblk_t block, ext4_lblk_t num,
+				    struct fiemap_extent_info *fieinfo)
 {
 	struct ext4_ext_path *path = NULL;
-	struct ext4_ext_cache cbex;
+	struct ext4_ext_cache newex;
 	struct ext4_extent *ex;
-	ext4_lblk_t next, start = 0, end = 0;
+	ext4_lblk_t next, next_del, start = 0, end = 0;
 	ext4_lblk_t last = block + num;
-	int depth, exists, err = 0;
-
-	BUG_ON(func == NULL);
-	BUG_ON(inode == NULL);
+	int exists, depth = 0, err = 0;
+	unsigned int flags = 0;
+	unsigned char blksize_bits = inode->i_sb->s_blocksize_bits;
 
 	while (block < last && block != EXT_MAX_BLOCKS) {
 		num = last - block;
 		/* find extent for this block */
 		down_read(&EXT4_I(inode)->i_data_sem);
+
+		if (path && ext_depth(inode) != depth) {
+			/* depth was changed. we have to realloc path */
+			kfree(path);
+			path = NULL;
+		}
+
 		path = ext4_ext_find_extent(inode, block, path);
-		up_read(&EXT4_I(inode)->i_data_sem);
 		if (IS_ERR(path)) {
+			up_read(&EXT4_I(inode)->i_data_sem);
 			err = PTR_ERR(path);
 			path = NULL;
 			break;
@@ -1987,13 +1998,16 @@
 
 		depth = ext_depth(inode);
 		if (unlikely(path[depth].p_hdr == NULL)) {
+			up_read(&EXT4_I(inode)->i_data_sem);
 			EXT4_ERROR_INODE(inode, "path[%d].p_hdr == NULL", depth);
 			err = -EIO;
 			break;
 		}
 		ex = path[depth].p_ext;
 		next = ext4_ext_next_allocated_block(path);
+		ext4_ext_drop_refs(path);
 
+		flags = 0;
 		exists = 0;
 		if (!ex) {
 			/* there is no extent yet, so try to allocate
@@ -2030,40 +2044,64 @@
 		BUG_ON(end <= start);
 
 		if (!exists) {
-			cbex.ec_block = start;
-			cbex.ec_len = end - start;
-			cbex.ec_start = 0;
+			newex.ec_block = start;
+			newex.ec_len = end - start;
+			newex.ec_start = 0;
 		} else {
-			cbex.ec_block = le32_to_cpu(ex->ee_block);
-			cbex.ec_len = ext4_ext_get_actual_len(ex);
-			cbex.ec_start = ext4_ext_pblock(ex);
+			newex.ec_block = le32_to_cpu(ex->ee_block);
+			newex.ec_len = ext4_ext_get_actual_len(ex);
+			newex.ec_start = ext4_ext_pblock(ex);
+			if (ext4_ext_is_uninitialized(ex))
+				flags |= FIEMAP_EXTENT_UNWRITTEN;
 		}
 
-		if (unlikely(cbex.ec_len == 0)) {
-			EXT4_ERROR_INODE(inode, "cbex.ec_len == 0");
+		/*
+		 * Find delayed extent and update newex accordingly. We call
+		 * it even in !exists case to find out whether newex is the
+		 * last existing extent or not.
+		 */
+		next_del = ext4_find_delayed_extent(inode, &newex);
+		if (!exists && next_del) {
+			exists = 1;
+			flags |= FIEMAP_EXTENT_DELALLOC;
+		}
+		up_read(&EXT4_I(inode)->i_data_sem);
+
+		if (unlikely(newex.ec_len == 0)) {
+			EXT4_ERROR_INODE(inode, "newex.ec_len == 0");
 			err = -EIO;
 			break;
 		}
-		err = func(inode, next, &cbex, ex, cbdata);
-		ext4_ext_drop_refs(path);
 
-		if (err < 0)
-			break;
-
-		if (err == EXT_REPEAT)
-			continue;
-		else if (err == EXT_BREAK) {
-			err = 0;
-			break;
+		/* This is possible iff next == next_del == EXT_MAX_BLOCKS */
+		if (next == next_del) {
+			flags |= FIEMAP_EXTENT_LAST;
+			if (unlikely(next_del != EXT_MAX_BLOCKS ||
+				     next != EXT_MAX_BLOCKS)) {
+				EXT4_ERROR_INODE(inode,
+						 "next extent == %u, next "
+						 "delalloc extent = %u",
+						 next, next_del);
+				err = -EIO;
+				break;
+			}
 		}
 
-		if (ext_depth(inode) != depth) {
-			/* depth was changed. we have to realloc path */
-			kfree(path);
-			path = NULL;
+		if (exists) {
+			err = fiemap_fill_next_extent(fieinfo,
+				(__u64)newex.ec_block << blksize_bits,
+				(__u64)newex.ec_start << blksize_bits,
+				(__u64)newex.ec_len << blksize_bits,
+				flags);
+			if (err < 0)
+				break;
+			if (err == 1) {
+				err = 0;
+				break;
+			}
 		}
 
-		block = cbex.ec_block + cbex.ec_len;
+		block = newex.ec_block + newex.ec_len;
 	}
 
 	if (path) {
@@ -2156,7 +2194,6 @@
 		  struct ext4_extent *ex)
 {
 	struct ext4_ext_cache *cex;
-	struct ext4_sb_info *sbi;
 	int ret = 0;
 
 	/*
@@ -2164,7 +2201,6 @@
 	 */
 	spin_lock(&EXT4_I(inode)->i_block_reservation_lock);
 	cex = &EXT4_I(inode)->i_cached_extent;
-	sbi = EXT4_SB(inode->i_sb);
 
 	/* has cache valid data? */
 	if (cex->ec_len == 0)
@@ -2273,7 +2309,13 @@
 int ext4_ext_index_trans_blocks(struct inode *inode, int nrblocks, int chunk)
 {
 	int index;
-	int depth = ext_depth(inode);
+	int depth;
+
+	/* If we are converting the inline data, only one is needed here. */
+	if (ext4_has_inline_data(inode))
+		return 1;
+
+	depth = ext_depth(inode);
 
 	if (chunk)
 		index = depth * 2;
@@ -3461,115 +3503,34 @@
 /**
  * ext4_find_delalloc_range: find delayed allocated block in the given range.
  *
- * Goes through the buffer heads in the range [lblk_start, lblk_end] and returns
- * whether there are any buffers marked for delayed allocation. It returns '1'
- * on the first delalloc'ed buffer head found. If no buffer head in the given
- * range is marked for delalloc, it returns 0.
- * lblk_start should always be <= lblk_end.
- * search_hint_reverse is to indicate that searching in reverse from lblk_end to
- * lblk_start might be more efficient (i.e., we will likely hit the delalloc'ed
- * block sooner). This is useful when blocks are truncated sequentially from
- * lblk_start towards lblk_end.
+ * Return 1 if there is a delalloc block in the range, otherwise 0.
  */
 static int ext4_find_delalloc_range(struct inode *inode,
 				    ext4_lblk_t lblk_start,
-				    ext4_lblk_t lblk_end,
-				    int search_hint_reverse)
+				    ext4_lblk_t lblk_end)
 {
-	struct address_space *mapping = inode->i_mapping;
-	struct buffer_head *head, *bh = NULL;
-	struct page *page;
-	ext4_lblk_t i, pg_lblk;
-	pgoff_t index;
+	struct extent_status es;
 
-	if (!test_opt(inode->i_sb, DELALLOC))
-		return 0;
-
-	/* reverse search wont work if fs block size is less than page size */
-	if (inode->i_blkbits < PAGE_CACHE_SHIFT)
-		search_hint_reverse = 0;
-
-	if (search_hint_reverse)
-		i = lblk_end;
+	es.start = lblk_start;
+	ext4_es_find_extent(inode, &es);
+	if (es.len == 0)
+		return 0; /* there is no delay extent in this tree */
+	else if (es.start <= lblk_start && lblk_start < es.start + es.len)
+		return 1;
+	else if (lblk_start <= es.start && es.start <= lblk_end)
+		return 1;
 	else
-		i = lblk_start;
-
-	index = i >> (PAGE_CACHE_SHIFT - inode->i_blkbits);
-
-	while ((i >= lblk_start) && (i <= lblk_end)) {
-		page = find_get_page(mapping, index);
-		if (!page)
-			goto nextpage;
-
-		if (!page_has_buffers(page))
-			goto nextpage;
-
-		head = page_buffers(page);
-		if (!head)
-			goto nextpage;
-
-		bh = head;
-		pg_lblk = index << (PAGE_CACHE_SHIFT -
-						inode->i_blkbits);
-		do {
-			if (unlikely(pg_lblk < lblk_start)) {
-				/*
-				 * This is possible when fs block size is less
-				 * than page size and our cluster starts/ends in
-				 * middle of the page. So we need to skip the
-				 * initial few blocks till we reach the 'lblk'
-				 */
-				pg_lblk++;
-				continue;
-			}
-
-			/* Check if the buffer is delayed allocated and that it
-			 * is not yet mapped. (when da-buffers are mapped during
-			 * their writeout, their da_mapped bit is set.)
-			 */
-			if (buffer_delay(bh) && !buffer_da_mapped(bh)) {
-				page_cache_release(page);
-				trace_ext4_find_delalloc_range(inode,
-						lblk_start, lblk_end,
-						search_hint_reverse,
-						1, i);
-				return 1;
-			}
-			if (search_hint_reverse)
-				i--;
-			else
-				i++;
-		} while ((i >= lblk_start) && (i <= lblk_end) &&
-				((bh = bh->b_this_page) != head));
-nextpage:
-		if (page)
-			page_cache_release(page);
-		/*
-		 * Move to next page. 'i' will be the first lblk in the next
-		 * page.
-		 */
-		if (search_hint_reverse)
-			index--;
-		else
-			index++;
-		i = index << (PAGE_CACHE_SHIFT - inode->i_blkbits);
-	}
-
-	trace_ext4_find_delalloc_range(inode, lblk_start, lblk_end,
-					search_hint_reverse, 0, 0);
-	return 0;
+		return 0;
 }
 
-int ext4_find_delalloc_cluster(struct inode *inode, ext4_lblk_t lblk,
-			       int search_hint_reverse)
+int ext4_find_delalloc_cluster(struct inode *inode, ext4_lblk_t lblk)
 {
 	struct ext4_sb_info *sbi = EXT4_SB(inode->i_sb);
 	ext4_lblk_t lblk_start, lblk_end;
 	lblk_start = lblk & (~(sbi->s_cluster_ratio - 1));
 	lblk_end = lblk_start + sbi->s_cluster_ratio - 1;
 
-	return ext4_find_delalloc_range(inode, lblk_start, lblk_end,
-					search_hint_reverse);
+	return ext4_find_delalloc_range(inode, lblk_start, lblk_end);
 }
 
 /**
@@ -3630,7 +3591,7 @@
 		lblk_from = lblk_start & (~(sbi->s_cluster_ratio - 1));
 		lblk_to = lblk_from + c_offset - 1;
 
-		if (ext4_find_delalloc_range(inode, lblk_from, lblk_to, 0))
+		if (ext4_find_delalloc_range(inode, lblk_from, lblk_to))
 			allocated_clusters--;
 	}
 
@@ -3640,7 +3601,7 @@
 		lblk_from = lblk_start + num_blks;
 		lblk_to = lblk_from + (sbi->s_cluster_ratio - c_offset) - 1;
 
-		if (ext4_find_delalloc_range(inode, lblk_from, lblk_to, 0))
+		if (ext4_find_delalloc_range(inode, lblk_from, lblk_to))
 			allocated_clusters--;
 	}
 
@@ -3663,8 +3624,8 @@
 		  flags, allocated);
 	ext4_ext_show_leaf(inode, path);
 
-	trace_ext4_ext_handle_uninitialized_extents(inode, map, allocated,
-						    newblock);
+	trace_ext4_ext_handle_uninitialized_extents(inode, map, flags,
+						    allocated, newblock);
 
 	/* get_block() before submit the IO, split the extent */
 	if ((flags & EXT4_GET_BLOCKS_PRE_IO)) {
@@ -3911,7 +3872,7 @@
 	struct ext4_extent newex, *ex, *ex2;
 	struct ext4_sb_info *sbi = EXT4_SB(inode->i_sb);
 	ext4_fsblk_t newblock = 0;
-	int free_on_err = 0, err = 0, depth, ret;
+	int free_on_err = 0, err = 0, depth;
 	unsigned int allocated = 0, offset = 0;
 	unsigned int allocated_clusters = 0;
 	struct ext4_allocation_request ar;
@@ -3927,7 +3888,7 @@
 	if (ext4_ext_in_cache(inode, map->m_lblk, &newex)) {
 		if (!newex.ee_start_lo && !newex.ee_start_hi) {
 			if ((sbi->s_cluster_ratio > 1) &&
-			    ext4_find_delalloc_cluster(inode, map->m_lblk, 0))
+			    ext4_find_delalloc_cluster(inode, map->m_lblk))
 				map->m_flags |= EXT4_MAP_FROM_CLUSTER;
 
 			if ((flags & EXT4_GET_BLOCKS_CREATE) == 0) {
@@ -4007,15 +3968,15 @@
 					ee_len, ee_start);
 				goto out;
 			}
-			ret = ext4_ext_handle_uninitialized_extents(
+			allocated = ext4_ext_handle_uninitialized_extents(
 				handle, inode, map, path, flags,
 				allocated, newblock);
-			return ret;
+			goto out3;
 		}
 	}
 
 	if ((sbi->s_cluster_ratio > 1) &&
-	    ext4_find_delalloc_cluster(inode, map->m_lblk, 0))
+	    ext4_find_delalloc_cluster(inode, map->m_lblk))
 		map->m_flags |= EXT4_MAP_FROM_CLUSTER;
 
 	/*
@@ -4284,8 +4245,8 @@
 		kfree(path);
 	}
 
-	trace_ext4_ext_map_blocks_exit(inode, map->m_lblk,
-		newblock, map->m_len, err ? err : allocated);
+out3:
+	trace_ext4_ext_map_blocks_exit(inode, map, err ? err : allocated);
 
 	return err ? err : allocated;
 }
@@ -4344,6 +4305,8 @@
 
 	last_block = (inode->i_size + sb->s_blocksize - 1)
 			>> EXT4_BLOCK_SIZE_BITS(sb);
+	err = ext4_es_remove_extent(inode, last_block,
+				    EXT_MAX_BLOCKS - last_block);
 	err = ext4_ext_remove_space(inode, last_block, EXT_MAX_BLOCKS - 1);
 
 	/* In a multi-transaction truncate, we only make the final
@@ -4434,6 +4397,10 @@
 	if (mode & FALLOC_FL_PUNCH_HOLE)
 		return ext4_punch_hole(file, offset, len);
 
+	ret = ext4_convert_inline_data(inode);
+	if (ret)
+		return ret;
+
 	trace_ext4_fallocate_enter(inode, offset, len, mode);
 	map.m_lblk = offset >> blkbits;
 	/*
@@ -4572,206 +4539,43 @@
 }
 
 /*
- * Callback function called for each extent to gather FIEMAP information.
+ * If newex is not existing extent (newex->ec_start equals zero) find
+ * delayed extent at start of newex and update newex accordingly and
+ * return start of the next delayed extent.
+ *
+ * If newex is existing extent (newex->ec_start is not equal zero)
+ * return start of next delayed extent or EXT_MAX_BLOCKS if no delayed
+ * extent found. Leave newex unmodified.
  */
-static int ext4_ext_fiemap_cb(struct inode *inode, ext4_lblk_t next,
-		       struct ext4_ext_cache *newex, struct ext4_extent *ex,
-		       void *data)
+static int ext4_find_delayed_extent(struct inode *inode,
+				    struct ext4_ext_cache *newex)
 {
-	__u64	logical;
-	__u64	physical;
-	__u64	length;
-	__u32	flags = 0;
-	int		ret = 0;
-	struct fiemap_extent_info *fieinfo = data;
-	unsigned char blksize_bits;
+	struct extent_status es;
+	ext4_lblk_t next_del;
 
-	blksize_bits = inode->i_sb->s_blocksize_bits;
-	logical = (__u64)newex->ec_block << blksize_bits;
+	es.start = newex->ec_block;
+	next_del = ext4_es_find_extent(inode, &es);
 
 	if (newex->ec_start == 0) {
 		/*
 		 * No extent in extent-tree contains block @newex->ec_start,
 		 * then the block may stay in 1)a hole or 2)delayed-extent.
-		 *
-		 * Holes or delayed-extents are processed as follows.
-		 * 1. lookup dirty pages with specified range in pagecache.
-		 *    If no page is got, then there is no delayed-extent and
-		 *    return with EXT_CONTINUE.
-		 * 2. find the 1st mapped buffer,
-		 * 3. check if the mapped buffer is both in the request range
-		 *    and a delayed buffer. If not, there is no delayed-extent,
-		 *    then return.
-		 * 4. a delayed-extent is found, the extent will be collected.
 		 */
-		ext4_lblk_t	end = 0;
-		pgoff_t		last_offset;
-		pgoff_t		offset;
-		pgoff_t		index;
-		pgoff_t		start_index = 0;
-		struct page	**pages = NULL;
-		struct buffer_head *bh = NULL;
-		struct buffer_head *head = NULL;
-		unsigned int nr_pages = PAGE_SIZE / sizeof(struct page *);
+		if (es.len == 0)
+			/* A hole found. */
+			return 0;
 
-		pages = kmalloc(PAGE_SIZE, GFP_KERNEL);
-		if (pages == NULL)
-			return -ENOMEM;
-
-		offset = logical >> PAGE_SHIFT;
-repeat:
-		last_offset = offset;
-		head = NULL;
-		ret = find_get_pages_tag(inode->i_mapping, &offset,
-					PAGECACHE_TAG_DIRTY, nr_pages, pages);
-
-		if (!(flags & FIEMAP_EXTENT_DELALLOC)) {
-			/* First time, try to find a mapped buffer. */
-			if (ret == 0) {
-out:
-				for (index = 0; index < ret; index++)
-					page_cache_release(pages[index]);
-				/* just a hole. */
-				kfree(pages);
-				return EXT_CONTINUE;
-			}
-			index = 0;
-
-next_page:
-			/* Try to find the 1st mapped buffer. */
-			end = ((__u64)pages[index]->index << PAGE_SHIFT) >>
-				  blksize_bits;
-			if (!page_has_buffers(pages[index]))
-				goto out;
-			head = page_buffers(pages[index]);
-			if (!head)
-				goto out;
-
-			index++;
-			bh = head;
-			do {
-				if (end >= newex->ec_block +
-					newex->ec_len)
-					/* The buffer is out of
-					 * the request range.
-					 */
-					goto out;
-
-				if (buffer_mapped(bh) &&
-				    end >= newex->ec_block) {
-					start_index = index - 1;
-					/* get the 1st mapped buffer. */
-					goto found_mapped_buffer;
-				}
-
-				bh = bh->b_this_page;
-				end++;
-			} while (bh != head);
-
-			/* No mapped buffer in the range found in this page,
-			 * We need to look up next page.
-			 */
-			if (index >= ret) {
-				/* There is no page left, but we need to limit
-				 * newex->ec_len.
-				 */
-				newex->ec_len = end - newex->ec_block;
-				goto out;
-			}
-			goto next_page;
-		} else {
-			/*Find contiguous delayed buffers. */
-			if (ret > 0 && pages[0]->index == last_offset)
-				head = page_buffers(pages[0]);
-			bh = head;
-			index = 1;
-			start_index = 0;
+		if (es.start > newex->ec_block) {
+			/* A hole found. */
+			newex->ec_len = min(es.start - newex->ec_block,
+					    newex->ec_len);
+			return 0;
 		}
 
-found_mapped_buffer:
-		if (bh != NULL && buffer_delay(bh)) {
-			/* 1st or contiguous delayed buffer found. */
-			if (!(flags & FIEMAP_EXTENT_DELALLOC)) {
-				/*
-				 * 1st delayed buffer found, record
-				 * the start of extent.
-				 */
-				flags |= FIEMAP_EXTENT_DELALLOC;
-				newex->ec_block = end;
-				logical = (__u64)end << blksize_bits;
-			}
-			/* Find contiguous delayed buffers. */
-			do {
-				if (!buffer_delay(bh))
-					goto found_delayed_extent;
-				bh = bh->b_this_page;
-				end++;
-			} while (bh != head);
-
-			for (; index < ret; index++) {
-				if (!page_has_buffers(pages[index])) {
-					bh = NULL;
-					break;
-				}
-				head = page_buffers(pages[index]);
-				if (!head) {
-					bh = NULL;
-					break;
-				}
-
-				if (pages[index]->index !=
-				    pages[start_index]->index + index
-				    - start_index) {
-					/* Blocks are not contiguous. */
-					bh = NULL;
-					break;
-				}
-				bh = head;
-				do {
-					if (!buffer_delay(bh))
-						/* Delayed-extent ends. */
-						goto found_delayed_extent;
-					bh = bh->b_this_page;
-					end++;
-				} while (bh != head);
-			}
-		} else if (!(flags & FIEMAP_EXTENT_DELALLOC))
-			/* a hole found. */
-			goto out;
-
-found_delayed_extent:
-		newex->ec_len = min(end - newex->ec_block,
-						(ext4_lblk_t)EXT_INIT_MAX_LEN);
-		if (ret == nr_pages && bh != NULL &&
-			newex->ec_len < EXT_INIT_MAX_LEN &&
-			buffer_delay(bh)) {
-			/* Have not collected an extent and continue. */
-			for (index = 0; index < ret; index++)
-				page_cache_release(pages[index]);
-			goto repeat;
-		}
-
-		for (index = 0; index < ret; index++)
-			page_cache_release(pages[index]);
-		kfree(pages);
+		newex->ec_len = es.start + es.len - newex->ec_block;
 	}
 
-	physical = (__u64)newex->ec_start << blksize_bits;
-	length =   (__u64)newex->ec_len << blksize_bits;
-
-	if (ex && ext4_ext_is_uninitialized(ex))
-		flags |= FIEMAP_EXTENT_UNWRITTEN;
-
-	if (next == EXT_MAX_BLOCKS)
-		flags |= FIEMAP_EXTENT_LAST;
-
-	ret = fiemap_fill_next_extent(fieinfo, logical, physical,
-					length, flags);
-	if (ret < 0)
-		return ret;
-	if (ret == 1)
-		return EXT_BREAK;
-	return EXT_CONTINUE;
+	return next_del;
 }
 /* fiemap flags we can handle specified here */
 #define EXT4_FIEMAP_FLAGS	(FIEMAP_FLAG_SYNC|FIEMAP_FLAG_XATTR)
@@ -4971,6 +4775,8 @@
 	ext4_ext_invalidate_cache(inode);
 	ext4_discard_preallocations(inode);
 
+	err = ext4_es_remove_extent(inode, first_block,
+				    stop_block - first_block);
 	err = ext4_ext_remove_space(inode, first_block, stop_block - 1);
 
 	ext4_ext_invalidate_cache(inode);
@@ -4991,12 +4797,22 @@
 	mutex_unlock(&inode->i_mutex);
 	return err;
 }
+
 int ext4_fiemap(struct inode *inode, struct fiemap_extent_info *fieinfo,
 		__u64 start, __u64 len)
 {
 	ext4_lblk_t start_blk;
 	int error = 0;
 
+	if (ext4_has_inline_data(inode)) {
+		int has_inline = 1;
+
+		error = ext4_inline_data_fiemap(inode, fieinfo, &has_inline);
+
+		if (has_inline)
+			return error;
+	}
+
 	/* fallback to generic here if not in extents fmt */
 	if (!(ext4_test_inode_flag(inode, EXT4_INODE_EXTENTS)))
 		return generic_block_fiemap(inode, fieinfo, start, len,
@@ -5018,11 +4834,11 @@
 		len_blks = ((ext4_lblk_t) last_blk) - start_blk + 1;
 
 		/*
-		 * Walk the extent tree gathering extent information.
-		 * ext4_ext_fiemap_cb will push extents back to user.
+		 * Walk the extent tree gathering extent information
+		 * and pushing extents back to the user.
 		 */
-		error = ext4_ext_walk_space(inode, start_blk, len_blks,
-					  ext4_ext_fiemap_cb, fieinfo);
+		error = ext4_fill_fiemap_extents(inode, start_blk,
+						 len_blks, fieinfo);
 	}
 
 	return error;
diff --git a/fs/ext4/extents_status.c b/fs/ext4/extents_status.c
new file mode 100644
index 0000000..564d981
--- /dev/null
+++ b/fs/ext4/extents_status.c
@@ -0,0 +1,500 @@
+/*
+ *  fs/ext4/extents_status.c
+ *
+ * Written by Yongqiang Yang <xiaoqiangnk@gmail.com>
+ * Modified by
+ *	Allison Henderson <achender@linux.vnet.ibm.com>
+ *	Hugh Dickins <hughd@google.com>
+ *	Zheng Liu <wenqing.lz@taobao.com>
+ *
+ * Ext4 extents status tree core functions.
+ */
+#include <linux/rbtree.h>
+#include "ext4.h"
+#include "extents_status.h"
+#include "ext4_extents.h"
+
+#include <trace/events/ext4.h>
+
+/*
+ * According to previous discussion in Ext4 Developer Workshop, we
+ * will introduce a new structure called io tree to track all extent
+ * status in order to solve some problems that we have met
+ * (e.g. Reservation space warning), and provide extent-level locking.
+ * Delay extent tree is the first step to achieve this goal.  It is
+ * original built by Yongqiang Yang.  At that time it is called delay
+ * extent tree, whose goal is only track delay extent in memory to
+ * simplify the implementation of fiemap and bigalloc, and introduce
+ * lseek SEEK_DATA/SEEK_HOLE support.  That is why it is still called
+ * delay extent tree at the following comment.  But for better
+ * understand what it does, it has been rename to extent status tree.
+ *
+ * Currently the first step has been done.  All delay extents are
+ * tracked in the tree.  It maintains the delay extent when a delay
+ * allocation is issued, and the delay extent is written out or
+ * invalidated.  Therefore the implementation of fiemap and bigalloc
+ * are simplified, and SEEK_DATA/SEEK_HOLE are introduced.
+ *
+ * The following comment describes the implemenmtation of extent
+ * status tree and future works.
+ */
+
+/*
+ * extents status tree implementation for ext4.
+ *
+ *
+ * ==========================================================================
+ * Extents status encompass delayed extents and extent locks
+ *
+ * 1. Why delayed extent implementation ?
+ *
+ * Without delayed extent, ext4 identifies a delayed extent by looking
+ * up page cache, this has several deficiencies - complicated, buggy,
+ * and inefficient code.
+ *
+ * FIEMAP, SEEK_HOLE/DATA, bigalloc, punch hole and writeout all need
+ * to know if a block or a range of blocks are belonged to a delayed
+ * extent.
+ *
+ * Let us have a look at how they do without delayed extents implementation.
+ *   --	FIEMAP
+ *	FIEMAP looks up page cache to identify delayed allocations from holes.
+ *
+ *   --	SEEK_HOLE/DATA
+ *	SEEK_HOLE/DATA has the same problem as FIEMAP.
+ *
+ *   --	bigalloc
+ *	bigalloc looks up page cache to figure out if a block is
+ *	already under delayed allocation or not to determine whether
+ *	quota reserving is needed for the cluster.
+ *
+ *   -- punch hole
+ *	punch hole looks up page cache to identify a delayed extent.
+ *
+ *   --	writeout
+ *	Writeout looks up whole page cache to see if a buffer is
+ *	mapped, If there are not very many delayed buffers, then it is
+ *	time comsuming.
+ *
+ * With delayed extents implementation, FIEMAP, SEEK_HOLE/DATA,
+ * bigalloc and writeout can figure out if a block or a range of
+ * blocks is under delayed allocation(belonged to a delayed extent) or
+ * not by searching the delayed extent tree.
+ *
+ *
+ * ==========================================================================
+ * 2. ext4 delayed extents impelmentation
+ *
+ *   --	delayed extent
+ *	A delayed extent is a range of blocks which are contiguous
+ *	logically and under delayed allocation.  Unlike extent in
+ *	ext4, delayed extent in ext4 is a in-memory struct, there is
+ *	no corresponding on-disk data.  There is no limit on length of
+ *	delayed extent, so a delayed extent can contain as many blocks
+ *	as they are contiguous logically.
+ *
+ *   --	delayed extent tree
+ *	Every inode has a delayed extent tree and all under delayed
+ *	allocation blocks are added to the tree as delayed extents.
+ *	Delayed extents in the tree are ordered by logical block no.
+ *
+ *   --	operations on a delayed extent tree
+ *	There are three operations on a delayed extent tree: find next
+ *	delayed extent, adding a space(a range of blocks) and removing
+ *	a space.
+ *
+ *   --	race on a delayed extent tree
+ *	Delayed extent tree is protected inode->i_es_lock.
+ *
+ *
+ * ==========================================================================
+ * 3. performance analysis
+ *   --	overhead
+ *	1. There is a cache extent for write access, so if writes are
+ *	not very random, adding space operaions are in O(1) time.
+ *
+ *   --	gain
+ *	2. Code is much simpler, more readable, more maintainable and
+ *	more efficient.
+ *
+ *
+ * ==========================================================================
+ * 4. TODO list
+ *   -- Track all extent status
+ *
+ *   -- Improve get block process
+ *
+ *   -- Extent-level locking
+ */
+
+static struct kmem_cache *ext4_es_cachep;
+
+int __init ext4_init_es(void)
+{
+	ext4_es_cachep = KMEM_CACHE(extent_status, SLAB_RECLAIM_ACCOUNT);
+	if (ext4_es_cachep == NULL)
+		return -ENOMEM;
+	return 0;
+}
+
+void ext4_exit_es(void)
+{
+	if (ext4_es_cachep)
+		kmem_cache_destroy(ext4_es_cachep);
+}
+
+void ext4_es_init_tree(struct ext4_es_tree *tree)
+{
+	tree->root = RB_ROOT;
+	tree->cache_es = NULL;
+}
+
+#ifdef ES_DEBUG__
+static void ext4_es_print_tree(struct inode *inode)
+{
+	struct ext4_es_tree *tree;
+	struct rb_node *node;
+
+	printk(KERN_DEBUG "status extents for inode %lu:", inode->i_ino);
+	tree = &EXT4_I(inode)->i_es_tree;
+	node = rb_first(&tree->root);
+	while (node) {
+		struct extent_status *es;
+		es = rb_entry(node, struct extent_status, rb_node);
+		printk(KERN_DEBUG " [%u/%u)", es->start, es->len);
+		node = rb_next(node);
+	}
+	printk(KERN_DEBUG "\n");
+}
+#else
+#define ext4_es_print_tree(inode)
+#endif
+
+static inline ext4_lblk_t extent_status_end(struct extent_status *es)
+{
+	BUG_ON(es->start + es->len < es->start);
+	return es->start + es->len - 1;
+}
+
+/*
+ * search through the tree for an delayed extent with a given offset.  If
+ * it can't be found, try to find next extent.
+ */
+static struct extent_status *__es_tree_search(struct rb_root *root,
+					      ext4_lblk_t offset)
+{
+	struct rb_node *node = root->rb_node;
+	struct extent_status *es = NULL;
+
+	while (node) {
+		es = rb_entry(node, struct extent_status, rb_node);
+		if (offset < es->start)
+			node = node->rb_left;
+		else if (offset > extent_status_end(es))
+			node = node->rb_right;
+		else
+			return es;
+	}
+
+	if (es && offset < es->start)
+		return es;
+
+	if (es && offset > extent_status_end(es)) {
+		node = rb_next(&es->rb_node);
+		return node ? rb_entry(node, struct extent_status, rb_node) :
+			      NULL;
+	}
+
+	return NULL;
+}
+
+/*
+ * ext4_es_find_extent: find the 1st delayed extent covering @es->start
+ * if it exists, otherwise, the next extent after @es->start.
+ *
+ * @inode: the inode which owns delayed extents
+ * @es: delayed extent that we found
+ *
+ * Returns the first block of the next extent after es, otherwise
+ * EXT_MAX_BLOCKS if no delay extent is found.
+ * Delayed extent is returned via @es.
+ */
+ext4_lblk_t ext4_es_find_extent(struct inode *inode, struct extent_status *es)
+{
+	struct ext4_es_tree *tree = NULL;
+	struct extent_status *es1 = NULL;
+	struct rb_node *node;
+	ext4_lblk_t ret = EXT_MAX_BLOCKS;
+
+	trace_ext4_es_find_extent_enter(inode, es->start);
+
+	read_lock(&EXT4_I(inode)->i_es_lock);
+	tree = &EXT4_I(inode)->i_es_tree;
+
+	/* find delay extent in cache firstly */
+	if (tree->cache_es) {
+		es1 = tree->cache_es;
+		if (in_range(es->start, es1->start, es1->len)) {
+			es_debug("%u cached by [%u/%u)\n",
+				 es->start, es1->start, es1->len);
+			goto out;
+		}
+	}
+
+	es->len = 0;
+	es1 = __es_tree_search(&tree->root, es->start);
+
+out:
+	if (es1) {
+		tree->cache_es = es1;
+		es->start = es1->start;
+		es->len = es1->len;
+		node = rb_next(&es1->rb_node);
+		if (node) {
+			es1 = rb_entry(node, struct extent_status, rb_node);
+			ret = es1->start;
+		}
+	}
+
+	read_unlock(&EXT4_I(inode)->i_es_lock);
+
+	trace_ext4_es_find_extent_exit(inode, es, ret);
+	return ret;
+}
+
+static struct extent_status *
+ext4_es_alloc_extent(ext4_lblk_t start, ext4_lblk_t len)
+{
+	struct extent_status *es;
+	es = kmem_cache_alloc(ext4_es_cachep, GFP_ATOMIC);
+	if (es == NULL)
+		return NULL;
+	es->start = start;
+	es->len = len;
+	return es;
+}
+
+static void ext4_es_free_extent(struct extent_status *es)
+{
+	kmem_cache_free(ext4_es_cachep, es);
+}
+
+static struct extent_status *
+ext4_es_try_to_merge_left(struct ext4_es_tree *tree, struct extent_status *es)
+{
+	struct extent_status *es1;
+	struct rb_node *node;
+
+	node = rb_prev(&es->rb_node);
+	if (!node)
+		return es;
+
+	es1 = rb_entry(node, struct extent_status, rb_node);
+	if (es->start == extent_status_end(es1) + 1) {
+		es1->len += es->len;
+		rb_erase(&es->rb_node, &tree->root);
+		ext4_es_free_extent(es);
+		es = es1;
+	}
+
+	return es;
+}
+
+static struct extent_status *
+ext4_es_try_to_merge_right(struct ext4_es_tree *tree, struct extent_status *es)
+{
+	struct extent_status *es1;
+	struct rb_node *node;
+
+	node = rb_next(&es->rb_node);
+	if (!node)
+		return es;
+
+	es1 = rb_entry(node, struct extent_status, rb_node);
+	if (es1->start == extent_status_end(es) + 1) {
+		es->len += es1->len;
+		rb_erase(node, &tree->root);
+		ext4_es_free_extent(es1);
+	}
+
+	return es;
+}
+
+static int __es_insert_extent(struct ext4_es_tree *tree, ext4_lblk_t offset,
+			      ext4_lblk_t len)
+{
+	struct rb_node **p = &tree->root.rb_node;
+	struct rb_node *parent = NULL;
+	struct extent_status *es;
+	ext4_lblk_t end = offset + len - 1;
+
+	BUG_ON(end < offset);
+	es = tree->cache_es;
+	if (es && offset == (extent_status_end(es) + 1)) {
+		es_debug("cached by [%u/%u)\n", es->start, es->len);
+		es->len += len;
+		es = ext4_es_try_to_merge_right(tree, es);
+		goto out;
+	} else if (es && es->start == end + 1) {
+		es_debug("cached by [%u/%u)\n", es->start, es->len);
+		es->start = offset;
+		es->len += len;
+		es = ext4_es_try_to_merge_left(tree, es);
+		goto out;
+	} else if (es && es->start <= offset &&
+		   end <= extent_status_end(es)) {
+		es_debug("cached by [%u/%u)\n", es->start, es->len);
+		goto out;
+	}
+
+	while (*p) {
+		parent = *p;
+		es = rb_entry(parent, struct extent_status, rb_node);
+
+		if (offset < es->start) {
+			if (es->start == end + 1) {
+				es->start = offset;
+				es->len += len;
+				es = ext4_es_try_to_merge_left(tree, es);
+				goto out;
+			}
+			p = &(*p)->rb_left;
+		} else if (offset > extent_status_end(es)) {
+			if (offset == extent_status_end(es) + 1) {
+				es->len += len;
+				es = ext4_es_try_to_merge_right(tree, es);
+				goto out;
+			}
+			p = &(*p)->rb_right;
+		} else {
+			if (extent_status_end(es) <= end)
+				es->len = offset - es->start + len;
+			goto out;
+		}
+	}
+
+	es = ext4_es_alloc_extent(offset, len);
+	if (!es)
+		return -ENOMEM;
+	rb_link_node(&es->rb_node, parent, p);
+	rb_insert_color(&es->rb_node, &tree->root);
+
+out:
+	tree->cache_es = es;
+	return 0;
+}
+
+/*
+ * ext4_es_insert_extent() adds a space to a delayed extent tree.
+ * Caller holds inode->i_es_lock.
+ *
+ * ext4_es_insert_extent is called by ext4_da_write_begin and
+ * ext4_es_remove_extent.
+ *
+ * Return 0 on success, error code on failure.
+ */
+int ext4_es_insert_extent(struct inode *inode, ext4_lblk_t offset,
+			  ext4_lblk_t len)
+{
+	struct ext4_es_tree *tree;
+	int err = 0;
+
+	trace_ext4_es_insert_extent(inode, offset, len);
+	es_debug("add [%u/%u) to extent status tree of inode %lu\n",
+		 offset, len, inode->i_ino);
+
+	write_lock(&EXT4_I(inode)->i_es_lock);
+	tree = &EXT4_I(inode)->i_es_tree;
+	err = __es_insert_extent(tree, offset, len);
+	write_unlock(&EXT4_I(inode)->i_es_lock);
+
+	ext4_es_print_tree(inode);
+
+	return err;
+}
+
+/*
+ * ext4_es_remove_extent() removes a space from a delayed extent tree.
+ * Caller holds inode->i_es_lock.
+ *
+ * Return 0 on success, error code on failure.
+ */
+int ext4_es_remove_extent(struct inode *inode, ext4_lblk_t offset,
+			  ext4_lblk_t len)
+{
+	struct rb_node *node;
+	struct ext4_es_tree *tree;
+	struct extent_status *es;
+	struct extent_status orig_es;
+	ext4_lblk_t len1, len2, end;
+	int err = 0;
+
+	trace_ext4_es_remove_extent(inode, offset, len);
+	es_debug("remove [%u/%u) from extent status tree of inode %lu\n",
+		 offset, len, inode->i_ino);
+
+	end = offset + len - 1;
+	BUG_ON(end < offset);
+	write_lock(&EXT4_I(inode)->i_es_lock);
+	tree = &EXT4_I(inode)->i_es_tree;
+	es = __es_tree_search(&tree->root, offset);
+	if (!es)
+		goto out;
+	if (es->start > end)
+		goto out;
+
+	/* Simply invalidate cache_es. */
+	tree->cache_es = NULL;
+
+	orig_es.start = es->start;
+	orig_es.len = es->len;
+	len1 = offset > es->start ? offset - es->start : 0;
+	len2 = extent_status_end(es) > end ?
+	       extent_status_end(es) - end : 0;
+	if (len1 > 0)
+		es->len = len1;
+	if (len2 > 0) {
+		if (len1 > 0) {
+			err = __es_insert_extent(tree, end + 1, len2);
+			if (err) {
+				es->start = orig_es.start;
+				es->len = orig_es.len;
+				goto out;
+			}
+		} else {
+			es->start = end + 1;
+			es->len = len2;
+		}
+		goto out;
+	}
+
+	if (len1 > 0) {
+		node = rb_next(&es->rb_node);
+		if (node)
+			es = rb_entry(node, struct extent_status, rb_node);
+		else
+			es = NULL;
+	}
+
+	while (es && extent_status_end(es) <= end) {
+		node = rb_next(&es->rb_node);
+		rb_erase(&es->rb_node, &tree->root);
+		ext4_es_free_extent(es);
+		if (!node) {
+			es = NULL;
+			break;
+		}
+		es = rb_entry(node, struct extent_status, rb_node);
+	}
+
+	if (es && es->start < end + 1) {
+		len1 = extent_status_end(es) - end;
+		es->start = end + 1;
+		es->len = len1;
+	}
+
+out:
+	write_unlock(&EXT4_I(inode)->i_es_lock);
+	ext4_es_print_tree(inode);
+	return err;
+}
diff --git a/fs/ext4/extents_status.h b/fs/ext4/extents_status.h
new file mode 100644
index 0000000..077f82d
--- /dev/null
+++ b/fs/ext4/extents_status.h
@@ -0,0 +1,45 @@
+/*
+ *  fs/ext4/extents_status.h
+ *
+ * Written by Yongqiang Yang <xiaoqiangnk@gmail.com>
+ * Modified by
+ *	Allison Henderson <achender@linux.vnet.ibm.com>
+ *	Zheng Liu <wenqing.lz@taobao.com>
+ *
+ */
+
+#ifndef _EXT4_EXTENTS_STATUS_H
+#define _EXT4_EXTENTS_STATUS_H
+
+/*
+ * Turn on ES_DEBUG__ to get lots of info about extent status operations.
+ */
+#ifdef ES_DEBUG__
+#define es_debug(fmt, ...)	printk(fmt, ##__VA_ARGS__)
+#else
+#define es_debug(fmt, ...)	no_printk(fmt, ##__VA_ARGS__)
+#endif
+
+struct extent_status {
+	struct rb_node rb_node;
+	ext4_lblk_t start;	/* first block extent covers */
+	ext4_lblk_t len;	/* length of extent in block */
+};
+
+struct ext4_es_tree {
+	struct rb_root root;
+	struct extent_status *cache_es;	/* recently accessed extent */
+};
+
+extern int __init ext4_init_es(void);
+extern void ext4_exit_es(void);
+extern void ext4_es_init_tree(struct ext4_es_tree *tree);
+
+extern int ext4_es_insert_extent(struct inode *inode, ext4_lblk_t start,
+				 ext4_lblk_t len);
+extern int ext4_es_remove_extent(struct inode *inode, ext4_lblk_t start,
+				 ext4_lblk_t len);
+extern ext4_lblk_t ext4_es_find_extent(struct inode *inode,
+				struct extent_status *es);
+
+#endif /* _EXT4_EXTENTS_STATUS_H */
diff --git a/fs/ext4/file.c b/fs/ext4/file.c
index bf3966b..b64a60b 100644
--- a/fs/ext4/file.c
+++ b/fs/ext4/file.c
@@ -24,6 +24,7 @@
 #include <linux/mount.h>
 #include <linux/path.h>
 #include <linux/quotaops.h>
+#include <linux/pagevec.h>
 #include "ext4.h"
 #include "ext4_jbd2.h"
 #include "xattr.h"
@@ -286,6 +287,324 @@
 }
 
 /*
+ * Here we use ext4_map_blocks() to get a block mapping for a extent-based
+ * file rather than ext4_ext_walk_space() because we can introduce
+ * SEEK_DATA/SEEK_HOLE for block-mapped and extent-mapped file at the same
+ * function.  When extent status tree has been fully implemented, it will
+ * track all extent status for a file and we can directly use it to
+ * retrieve the offset for SEEK_DATA/SEEK_HOLE.
+ */
+
+/*
+ * When we retrieve the offset for SEEK_DATA/SEEK_HOLE, we would need to
+ * lookup page cache to check whether or not there has some data between
+ * [startoff, endoff] because, if this range contains an unwritten extent,
+ * we determine this extent as a data or a hole according to whether the
+ * page cache has data or not.
+ */
+static int ext4_find_unwritten_pgoff(struct inode *inode,
+				     int origin,
+				     struct ext4_map_blocks *map,
+				     loff_t *offset)
+{
+	struct pagevec pvec;
+	unsigned int blkbits;
+	pgoff_t index;
+	pgoff_t end;
+	loff_t endoff;
+	loff_t startoff;
+	loff_t lastoff;
+	int found = 0;
+
+	blkbits = inode->i_sb->s_blocksize_bits;
+	startoff = *offset;
+	lastoff = startoff;
+	endoff = (map->m_lblk + map->m_len) << blkbits;
+
+	index = startoff >> PAGE_CACHE_SHIFT;
+	end = endoff >> PAGE_CACHE_SHIFT;
+
+	pagevec_init(&pvec, 0);
+	do {
+		int i, num;
+		unsigned long nr_pages;
+
+		num = min_t(pgoff_t, end - index, PAGEVEC_SIZE);
+		nr_pages = pagevec_lookup(&pvec, inode->i_mapping, index,
+					  (pgoff_t)num);
+		if (nr_pages == 0) {
+			if (origin == SEEK_DATA)
+				break;
+
+			BUG_ON(origin != SEEK_HOLE);
+			/*
+			 * If this is the first time to go into the loop and
+			 * offset is not beyond the end offset, it will be a
+			 * hole at this offset
+			 */
+			if (lastoff == startoff || lastoff < endoff)
+				found = 1;
+			break;
+		}
+
+		/*
+		 * If this is the first time to go into the loop and
+		 * offset is smaller than the first page offset, it will be a
+		 * hole at this offset.
+		 */
+		if (lastoff == startoff && origin == SEEK_HOLE &&
+		    lastoff < page_offset(pvec.pages[0])) {
+			found = 1;
+			break;
+		}
+
+		for (i = 0; i < nr_pages; i++) {
+			struct page *page = pvec.pages[i];
+			struct buffer_head *bh, *head;
+
+			/*
+			 * If the current offset is not beyond the end of given
+			 * range, it will be a hole.
+			 */
+			if (lastoff < endoff && origin == SEEK_HOLE &&
+			    page->index > end) {
+				found = 1;
+				*offset = lastoff;
+				goto out;
+			}
+
+			lock_page(page);
+
+			if (unlikely(page->mapping != inode->i_mapping)) {
+				unlock_page(page);
+				continue;
+			}
+
+			if (!page_has_buffers(page)) {
+				unlock_page(page);
+				continue;
+			}
+
+			if (page_has_buffers(page)) {
+				lastoff = page_offset(page);
+				bh = head = page_buffers(page);
+				do {
+					if (buffer_uptodate(bh) ||
+					    buffer_unwritten(bh)) {
+						if (origin == SEEK_DATA)
+							found = 1;
+					} else {
+						if (origin == SEEK_HOLE)
+							found = 1;
+					}
+					if (found) {
+						*offset = max_t(loff_t,
+							startoff, lastoff);
+						unlock_page(page);
+						goto out;
+					}
+					lastoff += bh->b_size;
+					bh = bh->b_this_page;
+				} while (bh != head);
+			}
+
+			lastoff = page_offset(page) + PAGE_SIZE;
+			unlock_page(page);
+		}
+
+		/*
+		 * The no. of pages is less than our desired, that would be a
+		 * hole in there.
+		 */
+		if (nr_pages < num && origin == SEEK_HOLE) {
+			found = 1;
+			*offset = lastoff;
+			break;
+		}
+
+		index = pvec.pages[i - 1]->index + 1;
+		pagevec_release(&pvec);
+	} while (index <= end);
+
+out:
+	pagevec_release(&pvec);
+	return found;
+}
+
+/*
+ * ext4_seek_data() retrieves the offset for SEEK_DATA.
+ */
+static loff_t ext4_seek_data(struct file *file, loff_t offset, loff_t maxsize)
+{
+	struct inode *inode = file->f_mapping->host;
+	struct ext4_map_blocks map;
+	struct extent_status es;
+	ext4_lblk_t start, last, end;
+	loff_t dataoff, isize;
+	int blkbits;
+	int ret = 0;
+
+	mutex_lock(&inode->i_mutex);
+
+	isize = i_size_read(inode);
+	if (offset >= isize) {
+		mutex_unlock(&inode->i_mutex);
+		return -ENXIO;
+	}
+
+	blkbits = inode->i_sb->s_blocksize_bits;
+	start = offset >> blkbits;
+	last = start;
+	end = isize >> blkbits;
+	dataoff = offset;
+
+	do {
+		map.m_lblk = last;
+		map.m_len = end - last + 1;
+		ret = ext4_map_blocks(NULL, inode, &map, 0);
+		if (ret > 0 && !(map.m_flags & EXT4_MAP_UNWRITTEN)) {
+			if (last != start)
+				dataoff = last << blkbits;
+			break;
+		}
+
+		/*
+		 * If there is a delay extent at this offset,
+		 * it will be as a data.
+		 */
+		es.start = last;
+		(void)ext4_es_find_extent(inode, &es);
+		if (last >= es.start &&
+		    last < es.start + es.len) {
+			if (last != start)
+				dataoff = last << blkbits;
+			break;
+		}
+
+		/*
+		 * If there is a unwritten extent at this offset,
+		 * it will be as a data or a hole according to page
+		 * cache that has data or not.
+		 */
+		if (map.m_flags & EXT4_MAP_UNWRITTEN) {
+			int unwritten;
+			unwritten = ext4_find_unwritten_pgoff(inode, SEEK_DATA,
+							      &map, &dataoff);
+			if (unwritten)
+				break;
+		}
+
+		last++;
+		dataoff = last << blkbits;
+	} while (last <= end);
+
+	mutex_unlock(&inode->i_mutex);
+
+	if (dataoff > isize)
+		return -ENXIO;
+
+	if (dataoff < 0 && !(file->f_mode & FMODE_UNSIGNED_OFFSET))
+		return -EINVAL;
+	if (dataoff > maxsize)
+		return -EINVAL;
+
+	if (dataoff != file->f_pos) {
+		file->f_pos = dataoff;
+		file->f_version = 0;
+	}
+
+	return dataoff;
+}
+
+/*
+ * ext4_seek_hole() retrieves the offset for SEEK_HOLE.
+ */
+static loff_t ext4_seek_hole(struct file *file, loff_t offset, loff_t maxsize)
+{
+	struct inode *inode = file->f_mapping->host;
+	struct ext4_map_blocks map;
+	struct extent_status es;
+	ext4_lblk_t start, last, end;
+	loff_t holeoff, isize;
+	int blkbits;
+	int ret = 0;
+
+	mutex_lock(&inode->i_mutex);
+
+	isize = i_size_read(inode);
+	if (offset >= isize) {
+		mutex_unlock(&inode->i_mutex);
+		return -ENXIO;
+	}
+
+	blkbits = inode->i_sb->s_blocksize_bits;
+	start = offset >> blkbits;
+	last = start;
+	end = isize >> blkbits;
+	holeoff = offset;
+
+	do {
+		map.m_lblk = last;
+		map.m_len = end - last + 1;
+		ret = ext4_map_blocks(NULL, inode, &map, 0);
+		if (ret > 0 && !(map.m_flags & EXT4_MAP_UNWRITTEN)) {
+			last += ret;
+			holeoff = last << blkbits;
+			continue;
+		}
+
+		/*
+		 * If there is a delay extent at this offset,
+		 * we will skip this extent.
+		 */
+		es.start = last;
+		(void)ext4_es_find_extent(inode, &es);
+		if (last >= es.start &&
+		    last < es.start + es.len) {
+			last = es.start + es.len;
+			holeoff = last << blkbits;
+			continue;
+		}
+
+		/*
+		 * If there is a unwritten extent at this offset,
+		 * it will be as a data or a hole according to page
+		 * cache that has data or not.
+		 */
+		if (map.m_flags & EXT4_MAP_UNWRITTEN) {
+			int unwritten;
+			unwritten = ext4_find_unwritten_pgoff(inode, SEEK_HOLE,
+							      &map, &holeoff);
+			if (!unwritten) {
+				last += ret;
+				holeoff = last << blkbits;
+				continue;
+			}
+		}
+
+		/* find a hole */
+		break;
+	} while (last <= end);
+
+	mutex_unlock(&inode->i_mutex);
+
+	if (holeoff > isize)
+		holeoff = isize;
+
+	if (holeoff < 0 && !(file->f_mode & FMODE_UNSIGNED_OFFSET))
+		return -EINVAL;
+	if (holeoff > maxsize)
+		return -EINVAL;
+
+	if (holeoff != file->f_pos) {
+		file->f_pos = holeoff;
+		file->f_version = 0;
+	}
+
+	return holeoff;
+}
+
+/*
  * ext4_llseek() handles both block-mapped and extent-mapped maxbytes values
  * by calling generic_file_llseek_size() with the appropriate maxbytes
  * value for each.
@@ -300,8 +619,19 @@
 	else
 		maxbytes = inode->i_sb->s_maxbytes;
 
-	return generic_file_llseek_size(file, offset, origin,
-					maxbytes, i_size_read(inode));
+	switch (origin) {
+	case SEEK_SET:
+	case SEEK_CUR:
+	case SEEK_END:
+		return generic_file_llseek_size(file, offset, origin,
+						maxbytes, i_size_read(inode));
+	case SEEK_DATA:
+		return ext4_seek_data(file, offset, maxbytes);
+	case SEEK_HOLE:
+		return ext4_seek_hole(file, offset, maxbytes);
+	}
+
+	return -EINVAL;
 }
 
 const struct file_operations ext4_file_operations = {
@@ -326,12 +656,10 @@
 const struct inode_operations ext4_file_inode_operations = {
 	.setattr	= ext4_setattr,
 	.getattr	= ext4_getattr,
-#ifdef CONFIG_EXT4_FS_XATTR
 	.setxattr	= generic_setxattr,
 	.getxattr	= generic_getxattr,
 	.listxattr	= ext4_listxattr,
 	.removexattr	= generic_removexattr,
-#endif
 	.get_acl	= ext4_get_acl,
 	.fiemap		= ext4_fiemap,
 };
diff --git a/fs/ext4/fsync.c b/fs/ext4/fsync.c
index be1d89f..dfbc1fe 100644
--- a/fs/ext4/fsync.c
+++ b/fs/ext4/fsync.c
@@ -44,7 +44,6 @@
  */
 static int ext4_sync_parent(struct inode *inode)
 {
-	struct writeback_control wbc;
 	struct dentry *dentry = NULL;
 	struct inode *next;
 	int ret = 0;
@@ -66,10 +65,7 @@
 		ret = sync_mapping_buffers(inode->i_mapping);
 		if (ret)
 			break;
-		memset(&wbc, 0, sizeof(wbc));
-		wbc.sync_mode = WB_SYNC_ALL;
-		wbc.nr_to_write = 0;         /* only write out the inode */
-		ret = sync_inode(inode, &wbc);
+		ret = sync_inode_metadata(inode, 1);
 		if (ret)
 			break;
 	}
diff --git a/fs/ext4/ialloc.c b/fs/ext4/ialloc.c
index 3a100e7..3f32c80 100644
--- a/fs/ext4/ialloc.c
+++ b/fs/ext4/ialloc.c
@@ -762,7 +762,6 @@
 
 		BUFFER_TRACE(block_bitmap_bh, "dirty block bitmap");
 		err = ext4_handle_dirty_metadata(handle, NULL, block_bitmap_bh);
-		brelse(block_bitmap_bh);
 
 		/* recheck and clear flag under lock if we still need to */
 		ext4_lock_group(sb, group);
@@ -775,6 +774,7 @@
 			ext4_group_desc_csum_set(sb, group, gdp);
 		}
 		ext4_unlock_group(sb, group);
+		brelse(block_bitmap_bh);
 
 		if (err)
 			goto fail;
@@ -902,6 +902,10 @@
 
 	ei->i_extra_isize = EXT4_SB(sb)->s_want_extra_isize;
 
+	ei->i_inline_off = 0;
+	if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_INLINE_DATA))
+		ext4_set_inode_state(inode, EXT4_STATE_MAY_INLINE_DATA);
+
 	ret = inode;
 	dquot_initialize(inode);
 	err = dquot_alloc_inode(inode);
diff --git a/fs/ext4/indirect.c b/fs/ext4/indirect.c
index 792e388..20862f9 100644
--- a/fs/ext4/indirect.c
+++ b/fs/ext4/indirect.c
@@ -22,6 +22,7 @@
 
 #include "ext4_jbd2.h"
 #include "truncate.h"
+#include "ext4_extents.h"	/* Needed for EXT_MAX_BLOCKS */
 
 #include <trace/events/ext4.h>
 
@@ -755,8 +756,7 @@
 		partial--;
 	}
 out:
-	trace_ext4_ind_map_blocks_exit(inode, map->m_lblk,
-				map->m_pblk, map->m_len, err);
+	trace_ext4_ind_map_blocks_exit(inode, map, err);
 	return err;
 }
 
@@ -1412,6 +1412,7 @@
 	down_write(&ei->i_data_sem);
 
 	ext4_discard_preallocations(inode);
+	ext4_es_remove_extent(inode, last_block, EXT_MAX_BLOCKS - last_block);
 
 	/*
 	 * The orphan list entry will now protect us from any crash which
diff --git a/fs/ext4/inline.c b/fs/ext4/inline.c
new file mode 100644
index 0000000..387c47c
--- /dev/null
+++ b/fs/ext4/inline.c
@@ -0,0 +1,1884 @@
+/*
+ * Copyright (c) 2012 Taobao.
+ * Written by Tao Ma <boyu.mt@taobao.com>
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of version 2.1 of the GNU Lesser General Public License
+ * as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ */
+#include "ext4_jbd2.h"
+#include "ext4.h"
+#include "xattr.h"
+#include "truncate.h"
+#include <linux/fiemap.h>
+
+#define EXT4_XATTR_SYSTEM_DATA	"data"
+#define EXT4_MIN_INLINE_DATA_SIZE	((sizeof(__le32) * EXT4_N_BLOCKS))
+#define EXT4_INLINE_DOTDOT_SIZE	4
+
+int ext4_get_inline_size(struct inode *inode)
+{
+	if (EXT4_I(inode)->i_inline_off)
+		return EXT4_I(inode)->i_inline_size;
+
+	return 0;
+}
+
+static int get_max_inline_xattr_value_size(struct inode *inode,
+					   struct ext4_iloc *iloc)
+{
+	struct ext4_xattr_ibody_header *header;
+	struct ext4_xattr_entry *entry;
+	struct ext4_inode *raw_inode;
+	int free, min_offs;
+
+	min_offs = EXT4_SB(inode->i_sb)->s_inode_size -
+			EXT4_GOOD_OLD_INODE_SIZE -
+			EXT4_I(inode)->i_extra_isize -
+			sizeof(struct ext4_xattr_ibody_header);
+
+	/*
+	 * We need to subtract another sizeof(__u32) since an in-inode xattr
+	 * needs an empty 4 bytes to indicate the gap between the xattr entry
+	 * and the name/value pair.
+	 */
+	if (!ext4_test_inode_state(inode, EXT4_STATE_XATTR))
+		return EXT4_XATTR_SIZE(min_offs -
+			EXT4_XATTR_LEN(strlen(EXT4_XATTR_SYSTEM_DATA)) -
+			EXT4_XATTR_ROUND - sizeof(__u32));
+
+	raw_inode = ext4_raw_inode(iloc);
+	header = IHDR(inode, raw_inode);
+	entry = IFIRST(header);
+
+	/* Compute min_offs. */
+	for (; !IS_LAST_ENTRY(entry); entry = EXT4_XATTR_NEXT(entry)) {
+		if (!entry->e_value_block && entry->e_value_size) {
+			size_t offs = le16_to_cpu(entry->e_value_offs);
+			if (offs < min_offs)
+				min_offs = offs;
+		}
+	}
+	free = min_offs -
+		((void *)entry - (void *)IFIRST(header)) - sizeof(__u32);
+
+	if (EXT4_I(inode)->i_inline_off) {
+		entry = (struct ext4_xattr_entry *)
+			((void *)raw_inode + EXT4_I(inode)->i_inline_off);
+
+		free += le32_to_cpu(entry->e_value_size);
+		goto out;
+	}
+
+	free -= EXT4_XATTR_LEN(strlen(EXT4_XATTR_SYSTEM_DATA));
+
+	if (free > EXT4_XATTR_ROUND)
+		free = EXT4_XATTR_SIZE(free - EXT4_XATTR_ROUND);
+	else
+		free = 0;
+
+out:
+	return free;
+}
+
+/*
+ * Get the maximum size we now can store in an inode.
+ * If we can't find the space for a xattr entry, don't use the space
+ * of the extents since we have no space to indicate the inline data.
+ */
+int ext4_get_max_inline_size(struct inode *inode)
+{
+	int error, max_inline_size;
+	struct ext4_iloc iloc;
+
+	if (EXT4_I(inode)->i_extra_isize == 0)
+		return 0;
+
+	error = ext4_get_inode_loc(inode, &iloc);
+	if (error) {
+		ext4_error_inode(inode, __func__, __LINE__, 0,
+				 "can't get inode location %lu",
+				 inode->i_ino);
+		return 0;
+	}
+
+	down_read(&EXT4_I(inode)->xattr_sem);
+	max_inline_size = get_max_inline_xattr_value_size(inode, &iloc);
+	up_read(&EXT4_I(inode)->xattr_sem);
+
+	brelse(iloc.bh);
+
+	if (!max_inline_size)
+		return 0;
+
+	return max_inline_size + EXT4_MIN_INLINE_DATA_SIZE;
+}
+
+int ext4_has_inline_data(struct inode *inode)
+{
+	return ext4_test_inode_flag(inode, EXT4_INODE_INLINE_DATA) &&
+	       EXT4_I(inode)->i_inline_off;
+}
+
+/*
+ * this function does not take xattr_sem, which is OK because it is
+ * currently only used in a code path coming form ext4_iget, before
+ * the new inode has been unlocked
+ */
+int ext4_find_inline_data_nolock(struct inode *inode)
+{
+	struct ext4_xattr_ibody_find is = {
+		.s = { .not_found = -ENODATA, },
+	};
+	struct ext4_xattr_info i = {
+		.name_index = EXT4_XATTR_INDEX_SYSTEM,
+		.name = EXT4_XATTR_SYSTEM_DATA,
+	};
+	int error;
+
+	if (EXT4_I(inode)->i_extra_isize == 0)
+		return 0;
+
+	error = ext4_get_inode_loc(inode, &is.iloc);
+	if (error)
+		return error;
+
+	error = ext4_xattr_ibody_find(inode, &i, &is);
+	if (error)
+		goto out;
+
+	if (!is.s.not_found) {
+		EXT4_I(inode)->i_inline_off = (u16)((void *)is.s.here -
+					(void *)ext4_raw_inode(&is.iloc));
+		EXT4_I(inode)->i_inline_size = EXT4_MIN_INLINE_DATA_SIZE +
+				le32_to_cpu(is.s.here->e_value_size);
+		ext4_set_inode_state(inode, EXT4_STATE_MAY_INLINE_DATA);
+	}
+out:
+	brelse(is.iloc.bh);
+	return error;
+}
+
+static int ext4_read_inline_data(struct inode *inode, void *buffer,
+				 unsigned int len,
+				 struct ext4_iloc *iloc)
+{
+	struct ext4_xattr_entry *entry;
+	struct ext4_xattr_ibody_header *header;
+	int cp_len = 0;
+	struct ext4_inode *raw_inode;
+
+	if (!len)
+		return 0;
+
+	BUG_ON(len > EXT4_I(inode)->i_inline_size);
+
+	cp_len = len < EXT4_MIN_INLINE_DATA_SIZE ?
+			len : EXT4_MIN_INLINE_DATA_SIZE;
+
+	raw_inode = ext4_raw_inode(iloc);
+	memcpy(buffer, (void *)(raw_inode->i_block), cp_len);
+
+	len -= cp_len;
+	buffer += cp_len;
+
+	if (!len)
+		goto out;
+
+	header = IHDR(inode, raw_inode);
+	entry = (struct ext4_xattr_entry *)((void *)raw_inode +
+					    EXT4_I(inode)->i_inline_off);
+	len = min_t(unsigned int, len,
+		    (unsigned int)le32_to_cpu(entry->e_value_size));
+
+	memcpy(buffer,
+	       (void *)IFIRST(header) + le16_to_cpu(entry->e_value_offs), len);
+	cp_len += len;
+
+out:
+	return cp_len;
+}
+
+/*
+ * write the buffer to the inline inode.
+ * If 'create' is set, we don't need to do the extra copy in the xattr
+ * value since it is already handled by ext4_xattr_ibody_inline_set.
+ * That saves us one memcpy.
+ */
+void ext4_write_inline_data(struct inode *inode, struct ext4_iloc *iloc,
+			    void *buffer, loff_t pos, unsigned int len)
+{
+	struct ext4_xattr_entry *entry;
+	struct ext4_xattr_ibody_header *header;
+	struct ext4_inode *raw_inode;
+	int cp_len = 0;
+
+	BUG_ON(!EXT4_I(inode)->i_inline_off);
+	BUG_ON(pos + len > EXT4_I(inode)->i_inline_size);
+
+	raw_inode = ext4_raw_inode(iloc);
+	buffer += pos;
+
+	if (pos < EXT4_MIN_INLINE_DATA_SIZE) {
+		cp_len = pos + len > EXT4_MIN_INLINE_DATA_SIZE ?
+			 EXT4_MIN_INLINE_DATA_SIZE - pos : len;
+		memcpy((void *)raw_inode->i_block + pos, buffer, cp_len);
+
+		len -= cp_len;
+		buffer += cp_len;
+		pos += cp_len;
+	}
+
+	if (!len)
+		return;
+
+	pos -= EXT4_MIN_INLINE_DATA_SIZE;
+	header = IHDR(inode, raw_inode);
+	entry = (struct ext4_xattr_entry *)((void *)raw_inode +
+					    EXT4_I(inode)->i_inline_off);
+
+	memcpy((void *)IFIRST(header) + le16_to_cpu(entry->e_value_offs) + pos,
+	       buffer, len);
+}
+
+static int ext4_create_inline_data(handle_t *handle,
+				   struct inode *inode, unsigned len)
+{
+	int error;
+	void *value = NULL;
+	struct ext4_xattr_ibody_find is = {
+		.s = { .not_found = -ENODATA, },
+	};
+	struct ext4_xattr_info i = {
+		.name_index = EXT4_XATTR_INDEX_SYSTEM,
+		.name = EXT4_XATTR_SYSTEM_DATA,
+	};
+
+	error = ext4_get_inode_loc(inode, &is.iloc);
+	if (error)
+		return error;
+
+	error = ext4_journal_get_write_access(handle, is.iloc.bh);
+	if (error)
+		goto out;
+
+	if (len > EXT4_MIN_INLINE_DATA_SIZE) {
+		value = EXT4_ZERO_XATTR_VALUE;
+		len -= EXT4_MIN_INLINE_DATA_SIZE;
+	} else {
+		value = "";
+		len = 0;
+	}
+
+	/* Insert the the xttr entry. */
+	i.value = value;
+	i.value_len = len;
+
+	error = ext4_xattr_ibody_find(inode, &i, &is);
+	if (error)
+		goto out;
+
+	BUG_ON(!is.s.not_found);
+
+	error = ext4_xattr_ibody_inline_set(handle, inode, &i, &is);
+	if (error) {
+		if (error == -ENOSPC)
+			ext4_clear_inode_state(inode,
+					       EXT4_STATE_MAY_INLINE_DATA);
+		goto out;
+	}
+
+	memset((void *)ext4_raw_inode(&is.iloc)->i_block,
+		0, EXT4_MIN_INLINE_DATA_SIZE);
+
+	EXT4_I(inode)->i_inline_off = (u16)((void *)is.s.here -
+				      (void *)ext4_raw_inode(&is.iloc));
+	EXT4_I(inode)->i_inline_size = len + EXT4_MIN_INLINE_DATA_SIZE;
+	ext4_clear_inode_flag(inode, EXT4_INODE_EXTENTS);
+	ext4_set_inode_flag(inode, EXT4_INODE_INLINE_DATA);
+	get_bh(is.iloc.bh);
+	error = ext4_mark_iloc_dirty(handle, inode, &is.iloc);
+
+out:
+	brelse(is.iloc.bh);
+	return error;
+}
+
+static int ext4_update_inline_data(handle_t *handle, struct inode *inode,
+				   unsigned int len)
+{
+	int error;
+	void *value = NULL;
+	struct ext4_xattr_ibody_find is = {
+		.s = { .not_found = -ENODATA, },
+	};
+	struct ext4_xattr_info i = {
+		.name_index = EXT4_XATTR_INDEX_SYSTEM,
+		.name = EXT4_XATTR_SYSTEM_DATA,
+	};
+
+	/* If the old space is ok, write the data directly. */
+	if (len <= EXT4_I(inode)->i_inline_size)
+		return 0;
+
+	error = ext4_get_inode_loc(inode, &is.iloc);
+	if (error)
+		return error;
+
+	error = ext4_xattr_ibody_find(inode, &i, &is);
+	if (error)
+		goto out;
+
+	BUG_ON(is.s.not_found);
+
+	len -= EXT4_MIN_INLINE_DATA_SIZE;
+	value = kzalloc(len, GFP_NOFS);
+	if (!value)
+		goto out;
+
+	error = ext4_xattr_ibody_get(inode, i.name_index, i.name,
+				     value, len);
+	if (error == -ENODATA)
+		goto out;
+
+	error = ext4_journal_get_write_access(handle, is.iloc.bh);
+	if (error)
+		goto out;
+
+	/* Update the xttr entry. */
+	i.value = value;
+	i.value_len = len;
+
+	error = ext4_xattr_ibody_inline_set(handle, inode, &i, &is);
+	if (error)
+		goto out;
+
+	EXT4_I(inode)->i_inline_off = (u16)((void *)is.s.here -
+				      (void *)ext4_raw_inode(&is.iloc));
+	EXT4_I(inode)->i_inline_size = EXT4_MIN_INLINE_DATA_SIZE +
+				le32_to_cpu(is.s.here->e_value_size);
+	ext4_set_inode_state(inode, EXT4_STATE_MAY_INLINE_DATA);
+	get_bh(is.iloc.bh);
+	error = ext4_mark_iloc_dirty(handle, inode, &is.iloc);
+
+out:
+	kfree(value);
+	brelse(is.iloc.bh);
+	return error;
+}
+
+int ext4_prepare_inline_data(handle_t *handle, struct inode *inode,
+			     unsigned int len)
+{
+	int ret, size;
+	struct ext4_inode_info *ei = EXT4_I(inode);
+
+	if (!ext4_test_inode_state(inode, EXT4_STATE_MAY_INLINE_DATA))
+		return -ENOSPC;
+
+	size = ext4_get_max_inline_size(inode);
+	if (size < len)
+		return -ENOSPC;
+
+	down_write(&EXT4_I(inode)->xattr_sem);
+
+	if (ei->i_inline_off)
+		ret = ext4_update_inline_data(handle, inode, len);
+	else
+		ret = ext4_create_inline_data(handle, inode, len);
+
+	up_write(&EXT4_I(inode)->xattr_sem);
+
+	return ret;
+}
+
+static int ext4_destroy_inline_data_nolock(handle_t *handle,
+					   struct inode *inode)
+{
+	struct ext4_inode_info *ei = EXT4_I(inode);
+	struct ext4_xattr_ibody_find is = {
+		.s = { .not_found = 0, },
+	};
+	struct ext4_xattr_info i = {
+		.name_index = EXT4_XATTR_INDEX_SYSTEM,
+		.name = EXT4_XATTR_SYSTEM_DATA,
+		.value = NULL,
+		.value_len = 0,
+	};
+	int error;
+
+	if (!ei->i_inline_off)
+		return 0;
+
+	error = ext4_get_inode_loc(inode, &is.iloc);
+	if (error)
+		return error;
+
+	error = ext4_xattr_ibody_find(inode, &i, &is);
+	if (error)
+		goto out;
+
+	error = ext4_journal_get_write_access(handle, is.iloc.bh);
+	if (error)
+		goto out;
+
+	error = ext4_xattr_ibody_inline_set(handle, inode, &i, &is);
+	if (error)
+		goto out;
+
+	memset((void *)ext4_raw_inode(&is.iloc)->i_block,
+		0, EXT4_MIN_INLINE_DATA_SIZE);
+
+	if (EXT4_HAS_INCOMPAT_FEATURE(inode->i_sb,
+				      EXT4_FEATURE_INCOMPAT_EXTENTS)) {
+		if (S_ISDIR(inode->i_mode) ||
+		    S_ISREG(inode->i_mode) || S_ISLNK(inode->i_mode)) {
+			ext4_set_inode_flag(inode, EXT4_INODE_EXTENTS);
+			ext4_ext_tree_init(handle, inode);
+		}
+	}
+	ext4_clear_inode_flag(inode, EXT4_INODE_INLINE_DATA);
+
+	get_bh(is.iloc.bh);
+	error = ext4_mark_iloc_dirty(handle, inode, &is.iloc);
+
+	EXT4_I(inode)->i_inline_off = 0;
+	EXT4_I(inode)->i_inline_size = 0;
+	ext4_clear_inode_state(inode, EXT4_STATE_MAY_INLINE_DATA);
+out:
+	brelse(is.iloc.bh);
+	if (error == -ENODATA)
+		error = 0;
+	return error;
+}
+
+static int ext4_read_inline_page(struct inode *inode, struct page *page)
+{
+	void *kaddr;
+	int ret = 0;
+	size_t len;
+	struct ext4_iloc iloc;
+
+	BUG_ON(!PageLocked(page));
+	BUG_ON(!ext4_has_inline_data(inode));
+	BUG_ON(page->index);
+
+	if (!EXT4_I(inode)->i_inline_off) {
+		ext4_warning(inode->i_sb, "inode %lu doesn't have inline data.",
+			     inode->i_ino);
+		goto out;
+	}
+
+	ret = ext4_get_inode_loc(inode, &iloc);
+	if (ret)
+		goto out;
+
+	len = min_t(size_t, ext4_get_inline_size(inode), i_size_read(inode));
+	kaddr = kmap_atomic(page);
+	ret = ext4_read_inline_data(inode, kaddr, len, &iloc);
+	flush_dcache_page(page);
+	kunmap_atomic(kaddr);
+	zero_user_segment(page, len, PAGE_CACHE_SIZE);
+	SetPageUptodate(page);
+	brelse(iloc.bh);
+
+out:
+	return ret;
+}
+
+int ext4_readpage_inline(struct inode *inode, struct page *page)
+{
+	int ret = 0;
+
+	down_read(&EXT4_I(inode)->xattr_sem);
+	if (!ext4_has_inline_data(inode)) {
+		up_read(&EXT4_I(inode)->xattr_sem);
+		return -EAGAIN;
+	}
+
+	/*
+	 * Current inline data can only exist in the 1st page,
+	 * So for all the other pages, just set them uptodate.
+	 */
+	if (!page->index)
+		ret = ext4_read_inline_page(inode, page);
+	else if (!PageUptodate(page)) {
+		zero_user_segment(page, 0, PAGE_CACHE_SIZE);
+		SetPageUptodate(page);
+	}
+
+	up_read(&EXT4_I(inode)->xattr_sem);
+
+	unlock_page(page);
+	return ret >= 0 ? 0 : ret;
+}
+
+static int ext4_convert_inline_data_to_extent(struct address_space *mapping,
+					      struct inode *inode,
+					      unsigned flags)
+{
+	int ret, needed_blocks;
+	handle_t *handle = NULL;
+	int retries = 0, sem_held = 0;
+	struct page *page = NULL;
+	unsigned from, to;
+	struct ext4_iloc iloc;
+
+	if (!ext4_has_inline_data(inode)) {
+		/*
+		 * clear the flag so that no new write
+		 * will trap here again.
+		 */
+		ext4_clear_inode_state(inode, EXT4_STATE_MAY_INLINE_DATA);
+		return 0;
+	}
+
+	needed_blocks = ext4_writepage_trans_blocks(inode);
+
+	ret = ext4_get_inode_loc(inode, &iloc);
+	if (ret)
+		return ret;
+
+retry:
+	handle = ext4_journal_start(inode, needed_blocks);
+	if (IS_ERR(handle)) {
+		ret = PTR_ERR(handle);
+		handle = NULL;
+		goto out;
+	}
+
+	/* We cannot recurse into the filesystem as the transaction is already
+	 * started */
+	flags |= AOP_FLAG_NOFS;
+
+	page = grab_cache_page_write_begin(mapping, 0, flags);
+	if (!page) {
+		ret = -ENOMEM;
+		goto out;
+	}
+
+	down_write(&EXT4_I(inode)->xattr_sem);
+	sem_held = 1;
+	/* If some one has already done this for us, just exit. */
+	if (!ext4_has_inline_data(inode)) {
+		ret = 0;
+		goto out;
+	}
+
+	from = 0;
+	to = ext4_get_inline_size(inode);
+	if (!PageUptodate(page)) {
+		ret = ext4_read_inline_page(inode, page);
+		if (ret < 0)
+			goto out;
+	}
+
+	ret = ext4_destroy_inline_data_nolock(handle, inode);
+	if (ret)
+		goto out;
+
+	if (ext4_should_dioread_nolock(inode))
+		ret = __block_write_begin(page, from, to, ext4_get_block_write);
+	else
+		ret = __block_write_begin(page, from, to, ext4_get_block);
+
+	if (!ret && ext4_should_journal_data(inode)) {
+		ret = ext4_walk_page_buffers(handle, page_buffers(page),
+					     from, to, NULL,
+					     do_journal_get_write_access);
+	}
+
+	if (ret) {
+		unlock_page(page);
+		page_cache_release(page);
+		ext4_orphan_add(handle, inode);
+		up_write(&EXT4_I(inode)->xattr_sem);
+		sem_held = 0;
+		ext4_journal_stop(handle);
+		handle = NULL;
+		ext4_truncate_failed_write(inode);
+		/*
+		 * If truncate failed early the inode might
+		 * still be on the orphan list; we need to
+		 * make sure the inode is removed from the
+		 * orphan list in that case.
+		 */
+		if (inode->i_nlink)
+			ext4_orphan_del(NULL, inode);
+	}
+
+	if (ret == -ENOSPC && ext4_should_retry_alloc(inode->i_sb, &retries))
+		goto retry;
+
+	block_commit_write(page, from, to);
+out:
+	if (page) {
+		unlock_page(page);
+		page_cache_release(page);
+	}
+	if (sem_held)
+		up_write(&EXT4_I(inode)->xattr_sem);
+	if (handle)
+		ext4_journal_stop(handle);
+	brelse(iloc.bh);
+	return ret;
+}
+
+/*
+ * Try to write data in the inode.
+ * If the inode has inline data, check whether the new write can be
+ * in the inode also. If not, create the page the handle, move the data
+ * to the page make it update and let the later codes create extent for it.
+ */
+int ext4_try_to_write_inline_data(struct address_space *mapping,
+				  struct inode *inode,
+				  loff_t pos, unsigned len,
+				  unsigned flags,
+				  struct page **pagep)
+{
+	int ret;
+	handle_t *handle;
+	struct page *page;
+	struct ext4_iloc iloc;
+
+	if (pos + len > ext4_get_max_inline_size(inode))
+		goto convert;
+
+	ret = ext4_get_inode_loc(inode, &iloc);
+	if (ret)
+		return ret;
+
+	/*
+	 * The possible write could happen in the inode,
+	 * so try to reserve the space in inode first.
+	 */
+	handle = ext4_journal_start(inode, 1);
+	if (IS_ERR(handle)) {
+		ret = PTR_ERR(handle);
+		handle = NULL;
+		goto out;
+	}
+
+	ret = ext4_prepare_inline_data(handle, inode, pos + len);
+	if (ret && ret != -ENOSPC)
+		goto out;
+
+	/* We don't have space in inline inode, so convert it to extent. */
+	if (ret == -ENOSPC) {
+		ext4_journal_stop(handle);
+		brelse(iloc.bh);
+		goto convert;
+	}
+
+	flags |= AOP_FLAG_NOFS;
+
+	page = grab_cache_page_write_begin(mapping, 0, flags);
+	if (!page) {
+		ret = -ENOMEM;
+		goto out;
+	}
+
+	*pagep = page;
+	down_read(&EXT4_I(inode)->xattr_sem);
+	if (!ext4_has_inline_data(inode)) {
+		ret = 0;
+		unlock_page(page);
+		page_cache_release(page);
+		goto out_up_read;
+	}
+
+	if (!PageUptodate(page)) {
+		ret = ext4_read_inline_page(inode, page);
+		if (ret < 0)
+			goto out_up_read;
+	}
+
+	ret = 1;
+	handle = NULL;
+out_up_read:
+	up_read(&EXT4_I(inode)->xattr_sem);
+out:
+	if (handle)
+		ext4_journal_stop(handle);
+	brelse(iloc.bh);
+	return ret;
+convert:
+	return ext4_convert_inline_data_to_extent(mapping,
+						  inode, flags);
+}
+
+int ext4_write_inline_data_end(struct inode *inode, loff_t pos, unsigned len,
+			       unsigned copied, struct page *page)
+{
+	int ret;
+	void *kaddr;
+	struct ext4_iloc iloc;
+
+	if (unlikely(copied < len)) {
+		if (!PageUptodate(page)) {
+			copied = 0;
+			goto out;
+		}
+	}
+
+	ret = ext4_get_inode_loc(inode, &iloc);
+	if (ret) {
+		ext4_std_error(inode->i_sb, ret);
+		copied = 0;
+		goto out;
+	}
+
+	down_write(&EXT4_I(inode)->xattr_sem);
+	BUG_ON(!ext4_has_inline_data(inode));
+
+	kaddr = kmap_atomic(page);
+	ext4_write_inline_data(inode, &iloc, kaddr, pos, len);
+	kunmap_atomic(kaddr);
+	SetPageUptodate(page);
+	/* clear page dirty so that writepages wouldn't work for us. */
+	ClearPageDirty(page);
+
+	up_write(&EXT4_I(inode)->xattr_sem);
+	brelse(iloc.bh);
+out:
+	return copied;
+}
+
+struct buffer_head *
+ext4_journalled_write_inline_data(struct inode *inode,
+				  unsigned len,
+				  struct page *page)
+{
+	int ret;
+	void *kaddr;
+	struct ext4_iloc iloc;
+
+	ret = ext4_get_inode_loc(inode, &iloc);
+	if (ret) {
+		ext4_std_error(inode->i_sb, ret);
+		return NULL;
+	}
+
+	down_write(&EXT4_I(inode)->xattr_sem);
+	kaddr = kmap_atomic(page);
+	ext4_write_inline_data(inode, &iloc, kaddr, 0, len);
+	kunmap_atomic(kaddr);
+	up_write(&EXT4_I(inode)->xattr_sem);
+
+	return iloc.bh;
+}
+
+/*
+ * Try to make the page cache and handle ready for the inline data case.
+ * We can call this function in 2 cases:
+ * 1. The inode is created and the first write exceeds inline size. We can
+ *    clear the inode state safely.
+ * 2. The inode has inline data, then we need to read the data, make it
+ *    update and dirty so that ext4_da_writepages can handle it. We don't
+ *    need to start the journal since the file's metatdata isn't changed now.
+ */
+static int ext4_da_convert_inline_data_to_extent(struct address_space *mapping,
+						 struct inode *inode,
+						 unsigned flags,
+						 void **fsdata)
+{
+	int ret = 0, inline_size;
+	struct page *page;
+
+	page = grab_cache_page_write_begin(mapping, 0, flags);
+	if (!page)
+		return -ENOMEM;
+
+	down_read(&EXT4_I(inode)->xattr_sem);
+	if (!ext4_has_inline_data(inode)) {
+		ext4_clear_inode_state(inode, EXT4_STATE_MAY_INLINE_DATA);
+		goto out;
+	}
+
+	inline_size = ext4_get_inline_size(inode);
+
+	if (!PageUptodate(page)) {
+		ret = ext4_read_inline_page(inode, page);
+		if (ret < 0)
+			goto out;
+	}
+
+	ret = __block_write_begin(page, 0, inline_size,
+				  ext4_da_get_block_prep);
+	if (ret) {
+		ext4_truncate_failed_write(inode);
+		goto out;
+	}
+
+	SetPageDirty(page);
+	SetPageUptodate(page);
+	ext4_clear_inode_state(inode, EXT4_STATE_MAY_INLINE_DATA);
+	*fsdata = (void *)CONVERT_INLINE_DATA;
+
+out:
+	up_read(&EXT4_I(inode)->xattr_sem);
+	if (page) {
+		unlock_page(page);
+		page_cache_release(page);
+	}
+	return ret;
+}
+
+/*
+ * Prepare the write for the inline data.
+ * If the the data can be written into the inode, we just read
+ * the page and make it uptodate, and start the journal.
+ * Otherwise read the page, makes it dirty so that it can be
+ * handle in writepages(the i_disksize update is left to the
+ * normal ext4_da_write_end).
+ */
+int ext4_da_write_inline_data_begin(struct address_space *mapping,
+				    struct inode *inode,
+				    loff_t pos, unsigned len,
+				    unsigned flags,
+				    struct page **pagep,
+				    void **fsdata)
+{
+	int ret, inline_size;
+	handle_t *handle;
+	struct page *page;
+	struct ext4_iloc iloc;
+
+	ret = ext4_get_inode_loc(inode, &iloc);
+	if (ret)
+		return ret;
+
+	handle = ext4_journal_start(inode, 1);
+	if (IS_ERR(handle)) {
+		ret = PTR_ERR(handle);
+		handle = NULL;
+		goto out;
+	}
+
+	inline_size = ext4_get_max_inline_size(inode);
+
+	ret = -ENOSPC;
+	if (inline_size >= pos + len) {
+		ret = ext4_prepare_inline_data(handle, inode, pos + len);
+		if (ret && ret != -ENOSPC)
+			goto out;
+	}
+
+	if (ret == -ENOSPC) {
+		ret = ext4_da_convert_inline_data_to_extent(mapping,
+							    inode,
+							    flags,
+							    fsdata);
+		goto out;
+	}
+
+	/*
+	 * We cannot recurse into the filesystem as the transaction
+	 * is already started.
+	 */
+	flags |= AOP_FLAG_NOFS;
+
+	page = grab_cache_page_write_begin(mapping, 0, flags);
+	if (!page) {
+		ret = -ENOMEM;
+		goto out;
+	}
+
+	down_read(&EXT4_I(inode)->xattr_sem);
+	if (!ext4_has_inline_data(inode)) {
+		ret = 0;
+		goto out_release_page;
+	}
+
+	if (!PageUptodate(page)) {
+		ret = ext4_read_inline_page(inode, page);
+		if (ret < 0)
+			goto out_release_page;
+	}
+
+	up_read(&EXT4_I(inode)->xattr_sem);
+	*pagep = page;
+	handle = NULL;
+	brelse(iloc.bh);
+	return 1;
+out_release_page:
+	up_read(&EXT4_I(inode)->xattr_sem);
+	unlock_page(page);
+	page_cache_release(page);
+out:
+	if (handle)
+		ext4_journal_stop(handle);
+	brelse(iloc.bh);
+	return ret;
+}
+
+int ext4_da_write_inline_data_end(struct inode *inode, loff_t pos,
+				  unsigned len, unsigned copied,
+				  struct page *page)
+{
+	int i_size_changed = 0;
+
+	copied = ext4_write_inline_data_end(inode, pos, len, copied, page);
+
+	/*
+	 * No need to use i_size_read() here, the i_size
+	 * cannot change under us because we hold i_mutex.
+	 *
+	 * But it's important to update i_size while still holding page lock:
+	 * page writeout could otherwise come in and zero beyond i_size.
+	 */
+	if (pos+copied > inode->i_size) {
+		i_size_write(inode, pos+copied);
+		i_size_changed = 1;
+	}
+	unlock_page(page);
+	page_cache_release(page);
+
+	/*
+	 * Don't mark the inode dirty under page lock. First, it unnecessarily
+	 * makes the holding time of page lock longer. Second, it forces lock
+	 * ordering of page lock and transaction start for journaling
+	 * filesystems.
+	 */
+	if (i_size_changed)
+		mark_inode_dirty(inode);
+
+	return copied;
+}
+
+#ifdef INLINE_DIR_DEBUG
+void ext4_show_inline_dir(struct inode *dir, struct buffer_head *bh,
+			  void *inline_start, int inline_size)
+{
+	int offset;
+	unsigned short de_len;
+	struct ext4_dir_entry_2 *de = inline_start;
+	void *dlimit = inline_start + inline_size;
+
+	trace_printk("inode %lu\n", dir->i_ino);
+	offset = 0;
+	while ((void *)de < dlimit) {
+		de_len = ext4_rec_len_from_disk(de->rec_len, inline_size);
+		trace_printk("de: off %u rlen %u name %*.s nlen %u ino %u\n",
+			     offset, de_len, de->name_len, de->name,
+			     de->name_len, le32_to_cpu(de->inode));
+		if (ext4_check_dir_entry(dir, NULL, de, bh,
+					 inline_start, inline_size, offset))
+			BUG();
+
+		offset += de_len;
+		de = (struct ext4_dir_entry_2 *) ((char *) de + de_len);
+	}
+}
+#else
+#define ext4_show_inline_dir(dir, bh, inline_start, inline_size)
+#endif
+
+/*
+ * Add a new entry into a inline dir.
+ * It will return -ENOSPC if no space is available, and -EIO
+ * and -EEXIST if directory entry already exists.
+ */
+static int ext4_add_dirent_to_inline(handle_t *handle,
+				     struct dentry *dentry,
+				     struct inode *inode,
+				     struct ext4_iloc *iloc,
+				     void *inline_start, int inline_size)
+{
+	struct inode	*dir = dentry->d_parent->d_inode;
+	const char	*name = dentry->d_name.name;
+	int		namelen = dentry->d_name.len;
+	unsigned short	reclen;
+	int		err;
+	struct ext4_dir_entry_2 *de;
+
+	reclen = EXT4_DIR_REC_LEN(namelen);
+	err = ext4_find_dest_de(dir, inode, iloc->bh,
+				inline_start, inline_size,
+				name, namelen, &de);
+	if (err)
+		return err;
+
+	err = ext4_journal_get_write_access(handle, iloc->bh);
+	if (err)
+		return err;
+	ext4_insert_dentry(inode, de, inline_size, name, namelen);
+
+	ext4_show_inline_dir(dir, iloc->bh, inline_start, inline_size);
+
+	/*
+	 * XXX shouldn't update any times until successful
+	 * completion of syscall, but too many callers depend
+	 * on this.
+	 *
+	 * XXX similarly, too many callers depend on
+	 * ext4_new_inode() setting the times, but error
+	 * recovery deletes the inode, so the worst that can
+	 * happen is that the times are slightly out of date
+	 * and/or different from the directory change time.
+	 */
+	dir->i_mtime = dir->i_ctime = ext4_current_time(dir);
+	ext4_update_dx_flag(dir);
+	dir->i_version++;
+	ext4_mark_inode_dirty(handle, dir);
+	return 1;
+}
+
+static void *ext4_get_inline_xattr_pos(struct inode *inode,
+				       struct ext4_iloc *iloc)
+{
+	struct ext4_xattr_entry *entry;
+	struct ext4_xattr_ibody_header *header;
+
+	BUG_ON(!EXT4_I(inode)->i_inline_off);
+
+	header = IHDR(inode, ext4_raw_inode(iloc));
+	entry = (struct ext4_xattr_entry *)((void *)ext4_raw_inode(iloc) +
+					    EXT4_I(inode)->i_inline_off);
+
+	return (void *)IFIRST(header) + le16_to_cpu(entry->e_value_offs);
+}
+
+/* Set the final de to cover the whole block. */
+static void ext4_update_final_de(void *de_buf, int old_size, int new_size)
+{
+	struct ext4_dir_entry_2 *de, *prev_de;
+	void *limit;
+	int de_len;
+
+	de = (struct ext4_dir_entry_2 *)de_buf;
+	if (old_size) {
+		limit = de_buf + old_size;
+		do {
+			prev_de = de;
+			de_len = ext4_rec_len_from_disk(de->rec_len, old_size);
+			de_buf += de_len;
+			de = (struct ext4_dir_entry_2 *)de_buf;
+		} while (de_buf < limit);
+
+		prev_de->rec_len = ext4_rec_len_to_disk(de_len + new_size -
+							old_size, new_size);
+	} else {
+		/* this is just created, so create an empty entry. */
+		de->inode = 0;
+		de->rec_len = ext4_rec_len_to_disk(new_size, new_size);
+	}
+}
+
+static int ext4_update_inline_dir(handle_t *handle, struct inode *dir,
+				  struct ext4_iloc *iloc)
+{
+	int ret;
+	int old_size = EXT4_I(dir)->i_inline_size - EXT4_MIN_INLINE_DATA_SIZE;
+	int new_size = get_max_inline_xattr_value_size(dir, iloc);
+
+	if (new_size - old_size <= EXT4_DIR_REC_LEN(1))
+		return -ENOSPC;
+
+	ret = ext4_update_inline_data(handle, dir,
+				      new_size + EXT4_MIN_INLINE_DATA_SIZE);
+	if (ret)
+		return ret;
+
+	ext4_update_final_de(ext4_get_inline_xattr_pos(dir, iloc), old_size,
+			     EXT4_I(dir)->i_inline_size -
+						EXT4_MIN_INLINE_DATA_SIZE);
+	dir->i_size = EXT4_I(dir)->i_disksize = EXT4_I(dir)->i_inline_size;
+	return 0;
+}
+
+static void ext4_restore_inline_data(handle_t *handle, struct inode *inode,
+				     struct ext4_iloc *iloc,
+				     void *buf, int inline_size)
+{
+	ext4_create_inline_data(handle, inode, inline_size);
+	ext4_write_inline_data(inode, iloc, buf, 0, inline_size);
+	ext4_set_inode_state(inode, EXT4_STATE_MAY_INLINE_DATA);
+}
+
+static int ext4_finish_convert_inline_dir(handle_t *handle,
+					  struct inode *inode,
+					  struct buffer_head *dir_block,
+					  void *buf,
+					  int inline_size)
+{
+	int err, csum_size = 0, header_size = 0;
+	struct ext4_dir_entry_2 *de;
+	struct ext4_dir_entry_tail *t;
+	void *target = dir_block->b_data;
+
+	/*
+	 * First create "." and ".." and then copy the dir information
+	 * back to the block.
+	 */
+	de = (struct ext4_dir_entry_2 *)target;
+	de = ext4_init_dot_dotdot(inode, de,
+		inode->i_sb->s_blocksize, csum_size,
+		le32_to_cpu(((struct ext4_dir_entry_2 *)buf)->inode), 1);
+	header_size = (void *)de - target;
+
+	memcpy((void *)de, buf + EXT4_INLINE_DOTDOT_SIZE,
+		inline_size - EXT4_INLINE_DOTDOT_SIZE);
+
+	if (EXT4_HAS_RO_COMPAT_FEATURE(inode->i_sb,
+				       EXT4_FEATURE_RO_COMPAT_METADATA_CSUM))
+		csum_size = sizeof(struct ext4_dir_entry_tail);
+
+	inode->i_size = inode->i_sb->s_blocksize;
+	i_size_write(inode, inode->i_sb->s_blocksize);
+	EXT4_I(inode)->i_disksize = inode->i_sb->s_blocksize;
+	ext4_update_final_de(dir_block->b_data,
+			inline_size - EXT4_INLINE_DOTDOT_SIZE + header_size,
+			inode->i_sb->s_blocksize - csum_size);
+
+	if (csum_size) {
+		t = EXT4_DIRENT_TAIL(dir_block->b_data,
+				     inode->i_sb->s_blocksize);
+		initialize_dirent_tail(t, inode->i_sb->s_blocksize);
+	}
+	set_buffer_uptodate(dir_block);
+	err = ext4_handle_dirty_dirent_node(handle, inode, dir_block);
+	if (err)
+		goto out;
+	set_buffer_verified(dir_block);
+out:
+	return err;
+}
+
+static int ext4_convert_inline_data_nolock(handle_t *handle,
+					   struct inode *inode,
+					   struct ext4_iloc *iloc)
+{
+	int error;
+	void *buf = NULL;
+	struct buffer_head *data_bh = NULL;
+	struct ext4_map_blocks map;
+	int inline_size;
+
+	inline_size = ext4_get_inline_size(inode);
+	buf = kmalloc(inline_size, GFP_NOFS);
+	if (!buf) {
+		error = -ENOMEM;
+		goto out;
+	}
+
+	error = ext4_read_inline_data(inode, buf, inline_size, iloc);
+	if (error < 0)
+		goto out;
+
+	error = ext4_destroy_inline_data_nolock(handle, inode);
+	if (error)
+		goto out;
+
+	map.m_lblk = 0;
+	map.m_len = 1;
+	map.m_flags = 0;
+	error = ext4_map_blocks(handle, inode, &map, EXT4_GET_BLOCKS_CREATE);
+	if (error < 0)
+		goto out_restore;
+	if (!(map.m_flags & EXT4_MAP_MAPPED)) {
+		error = -EIO;
+		goto out_restore;
+	}
+
+	data_bh = sb_getblk(inode->i_sb, map.m_pblk);
+	if (!data_bh) {
+		error = -EIO;
+		goto out_restore;
+	}
+
+	lock_buffer(data_bh);
+	error = ext4_journal_get_create_access(handle, data_bh);
+	if (error) {
+		unlock_buffer(data_bh);
+		error = -EIO;
+		goto out_restore;
+	}
+	memset(data_bh->b_data, 0, inode->i_sb->s_blocksize);
+
+	if (!S_ISDIR(inode->i_mode)) {
+		memcpy(data_bh->b_data, buf, inline_size);
+		set_buffer_uptodate(data_bh);
+		error = ext4_handle_dirty_metadata(handle,
+						   inode, data_bh);
+	} else {
+		error = ext4_finish_convert_inline_dir(handle, inode, data_bh,
+						       buf, inline_size);
+	}
+
+	unlock_buffer(data_bh);
+out_restore:
+	if (error)
+		ext4_restore_inline_data(handle, inode, iloc, buf, inline_size);
+
+out:
+	brelse(data_bh);
+	kfree(buf);
+	return error;
+}
+
+/*
+ * Try to add the new entry to the inline data.
+ * If succeeds, return 0. If not, extended the inline dir and copied data to
+ * the new created block.
+ */
+int ext4_try_add_inline_entry(handle_t *handle, struct dentry *dentry,
+			      struct inode *inode)
+{
+	int ret, inline_size;
+	void *inline_start;
+	struct ext4_iloc iloc;
+	struct inode *dir = dentry->d_parent->d_inode;
+
+	ret = ext4_get_inode_loc(dir, &iloc);
+	if (ret)
+		return ret;
+
+	down_write(&EXT4_I(dir)->xattr_sem);
+	if (!ext4_has_inline_data(dir))
+		goto out;
+
+	inline_start = (void *)ext4_raw_inode(&iloc)->i_block +
+						 EXT4_INLINE_DOTDOT_SIZE;
+	inline_size = EXT4_MIN_INLINE_DATA_SIZE - EXT4_INLINE_DOTDOT_SIZE;
+
+	ret = ext4_add_dirent_to_inline(handle, dentry, inode, &iloc,
+					inline_start, inline_size);
+	if (ret != -ENOSPC)
+		goto out;
+
+	/* check whether it can be inserted to inline xattr space. */
+	inline_size = EXT4_I(dir)->i_inline_size -
+			EXT4_MIN_INLINE_DATA_SIZE;
+	if (!inline_size) {
+		/* Try to use the xattr space.*/
+		ret = ext4_update_inline_dir(handle, dir, &iloc);
+		if (ret && ret != -ENOSPC)
+			goto out;
+
+		inline_size = EXT4_I(dir)->i_inline_size -
+				EXT4_MIN_INLINE_DATA_SIZE;
+	}
+
+	if (inline_size) {
+		inline_start = ext4_get_inline_xattr_pos(dir, &iloc);
+
+		ret = ext4_add_dirent_to_inline(handle, dentry, inode, &iloc,
+						inline_start, inline_size);
+
+		if (ret != -ENOSPC)
+			goto out;
+	}
+
+	/*
+	 * The inline space is filled up, so create a new block for it.
+	 * As the extent tree will be created, we have to save the inline
+	 * dir first.
+	 */
+	ret = ext4_convert_inline_data_nolock(handle, dir, &iloc);
+
+out:
+	ext4_mark_inode_dirty(handle, dir);
+	up_write(&EXT4_I(dir)->xattr_sem);
+	brelse(iloc.bh);
+	return ret;
+}
+
+int ext4_read_inline_dir(struct file *filp,
+			 void *dirent, filldir_t filldir,
+			 int *has_inline_data)
+{
+	int error = 0;
+	unsigned int offset, parent_ino;
+	int i, stored;
+	struct ext4_dir_entry_2 *de;
+	struct super_block *sb;
+	struct inode *inode = filp->f_path.dentry->d_inode;
+	int ret, inline_size = 0;
+	struct ext4_iloc iloc;
+	void *dir_buf = NULL;
+
+	ret = ext4_get_inode_loc(inode, &iloc);
+	if (ret)
+		return ret;
+
+	down_read(&EXT4_I(inode)->xattr_sem);
+	if (!ext4_has_inline_data(inode)) {
+		up_read(&EXT4_I(inode)->xattr_sem);
+		*has_inline_data = 0;
+		goto out;
+	}
+
+	inline_size = ext4_get_inline_size(inode);
+	dir_buf = kmalloc(inline_size, GFP_NOFS);
+	if (!dir_buf) {
+		ret = -ENOMEM;
+		up_read(&EXT4_I(inode)->xattr_sem);
+		goto out;
+	}
+
+	ret = ext4_read_inline_data(inode, dir_buf, inline_size, &iloc);
+	up_read(&EXT4_I(inode)->xattr_sem);
+	if (ret < 0)
+		goto out;
+
+	sb = inode->i_sb;
+	stored = 0;
+	parent_ino = le32_to_cpu(((struct ext4_dir_entry_2 *)dir_buf)->inode);
+
+	while (!error && !stored && filp->f_pos < inode->i_size) {
+revalidate:
+		/*
+		 * If the version has changed since the last call to
+		 * readdir(2), then we might be pointing to an invalid
+		 * dirent right now.  Scan from the start of the inline
+		 * dir to make sure.
+		 */
+		if (filp->f_version != inode->i_version) {
+			for (i = 0;
+			     i < inode->i_size && i < offset;) {
+				if (!i) {
+					/* skip "." and ".." if needed. */
+					i += EXT4_INLINE_DOTDOT_SIZE;
+					continue;
+				}
+				de = (struct ext4_dir_entry_2 *)
+					(dir_buf + i);
+				/* It's too expensive to do a full
+				 * dirent test each time round this
+				 * loop, but we do have to test at
+				 * least that it is non-zero.  A
+				 * failure will be detected in the
+				 * dirent test below. */
+				if (ext4_rec_len_from_disk(de->rec_len,
+					inline_size) < EXT4_DIR_REC_LEN(1))
+					break;
+				i += ext4_rec_len_from_disk(de->rec_len,
+							    inline_size);
+			}
+			offset = i;
+			filp->f_pos = offset;
+			filp->f_version = inode->i_version;
+		}
+
+		while (!error && filp->f_pos < inode->i_size) {
+			if (filp->f_pos == 0) {
+				error = filldir(dirent, ".", 1, 0, inode->i_ino,
+						DT_DIR);
+				if (error)
+					break;
+				stored++;
+
+				error = filldir(dirent, "..", 2, 0, parent_ino,
+						DT_DIR);
+				if (error)
+					break;
+				stored++;
+
+				filp->f_pos = offset = EXT4_INLINE_DOTDOT_SIZE;
+				continue;
+			}
+
+			de = (struct ext4_dir_entry_2 *)(dir_buf + offset);
+			if (ext4_check_dir_entry(inode, filp, de,
+						 iloc.bh, dir_buf,
+						 inline_size, offset)) {
+				ret = stored;
+				goto out;
+			}
+			offset += ext4_rec_len_from_disk(de->rec_len,
+							 inline_size);
+			if (le32_to_cpu(de->inode)) {
+				/* We might block in the next section
+				 * if the data destination is
+				 * currently swapped out.  So, use a
+				 * version stamp to detect whether or
+				 * not the directory has been modified
+				 * during the copy operation.
+				 */
+				u64 version = filp->f_version;
+
+				error = filldir(dirent, de->name,
+						de->name_len,
+						filp->f_pos,
+						le32_to_cpu(de->inode),
+						get_dtype(sb, de->file_type));
+				if (error)
+					break;
+				if (version != filp->f_version)
+					goto revalidate;
+				stored++;
+			}
+			filp->f_pos += ext4_rec_len_from_disk(de->rec_len,
+							      inline_size);
+		}
+		offset = 0;
+	}
+out:
+	kfree(dir_buf);
+	brelse(iloc.bh);
+	return ret;
+}
+
+struct buffer_head *ext4_get_first_inline_block(struct inode *inode,
+					struct ext4_dir_entry_2 **parent_de,
+					int *retval)
+{
+	struct ext4_iloc iloc;
+
+	*retval = ext4_get_inode_loc(inode, &iloc);
+	if (*retval)
+		return NULL;
+
+	*parent_de = (struct ext4_dir_entry_2 *)ext4_raw_inode(&iloc)->i_block;
+
+	return iloc.bh;
+}
+
+/*
+ * Try to create the inline data for the new dir.
+ * If it succeeds, return 0, otherwise return the error.
+ * In case of ENOSPC, the caller should create the normal disk layout dir.
+ */
+int ext4_try_create_inline_dir(handle_t *handle, struct inode *parent,
+			       struct inode *inode)
+{
+	int ret, inline_size = EXT4_MIN_INLINE_DATA_SIZE;
+	struct ext4_iloc iloc;
+	struct ext4_dir_entry_2 *de;
+
+	ret = ext4_get_inode_loc(inode, &iloc);
+	if (ret)
+		return ret;
+
+	ret = ext4_prepare_inline_data(handle, inode, inline_size);
+	if (ret)
+		goto out;
+
+	/*
+	 * For inline dir, we only save the inode information for the ".."
+	 * and create a fake dentry to cover the left space.
+	 */
+	de = (struct ext4_dir_entry_2 *)ext4_raw_inode(&iloc)->i_block;
+	de->inode = cpu_to_le32(parent->i_ino);
+	de = (struct ext4_dir_entry_2 *)((void *)de + EXT4_INLINE_DOTDOT_SIZE);
+	de->inode = 0;
+	de->rec_len = ext4_rec_len_to_disk(
+				inline_size - EXT4_INLINE_DOTDOT_SIZE,
+				inline_size);
+	set_nlink(inode, 2);
+	inode->i_size = EXT4_I(inode)->i_disksize = inline_size;
+out:
+	brelse(iloc.bh);
+	return ret;
+}
+
+struct buffer_head *ext4_find_inline_entry(struct inode *dir,
+					const struct qstr *d_name,
+					struct ext4_dir_entry_2 **res_dir,
+					int *has_inline_data)
+{
+	int ret;
+	struct ext4_iloc iloc;
+	void *inline_start;
+	int inline_size;
+
+	if (ext4_get_inode_loc(dir, &iloc))
+		return NULL;
+
+	down_read(&EXT4_I(dir)->xattr_sem);
+	if (!ext4_has_inline_data(dir)) {
+		*has_inline_data = 0;
+		goto out;
+	}
+
+	inline_start = (void *)ext4_raw_inode(&iloc)->i_block +
+						EXT4_INLINE_DOTDOT_SIZE;
+	inline_size = EXT4_MIN_INLINE_DATA_SIZE - EXT4_INLINE_DOTDOT_SIZE;
+	ret = search_dir(iloc.bh, inline_start, inline_size,
+			 dir, d_name, 0, res_dir);
+	if (ret == 1)
+		goto out_find;
+	if (ret < 0)
+		goto out;
+
+	if (ext4_get_inline_size(dir) == EXT4_MIN_INLINE_DATA_SIZE)
+		goto out;
+
+	inline_start = ext4_get_inline_xattr_pos(dir, &iloc);
+	inline_size = ext4_get_inline_size(dir) - EXT4_MIN_INLINE_DATA_SIZE;
+
+	ret = search_dir(iloc.bh, inline_start, inline_size,
+			 dir, d_name, 0, res_dir);
+	if (ret == 1)
+		goto out_find;
+
+out:
+	brelse(iloc.bh);
+	iloc.bh = NULL;
+out_find:
+	up_read(&EXT4_I(dir)->xattr_sem);
+	return iloc.bh;
+}
+
+int ext4_delete_inline_entry(handle_t *handle,
+			     struct inode *dir,
+			     struct ext4_dir_entry_2 *de_del,
+			     struct buffer_head *bh,
+			     int *has_inline_data)
+{
+	int err, inline_size;
+	struct ext4_iloc iloc;
+	void *inline_start;
+
+	err = ext4_get_inode_loc(dir, &iloc);
+	if (err)
+		return err;
+
+	down_write(&EXT4_I(dir)->xattr_sem);
+	if (!ext4_has_inline_data(dir)) {
+		*has_inline_data = 0;
+		goto out;
+	}
+
+	if ((void *)de_del - ((void *)ext4_raw_inode(&iloc)->i_block) <
+		EXT4_MIN_INLINE_DATA_SIZE) {
+		inline_start = (void *)ext4_raw_inode(&iloc)->i_block +
+					EXT4_INLINE_DOTDOT_SIZE;
+		inline_size = EXT4_MIN_INLINE_DATA_SIZE -
+				EXT4_INLINE_DOTDOT_SIZE;
+	} else {
+		inline_start = ext4_get_inline_xattr_pos(dir, &iloc);
+		inline_size = ext4_get_inline_size(dir) -
+				EXT4_MIN_INLINE_DATA_SIZE;
+	}
+
+	err = ext4_journal_get_write_access(handle, bh);
+	if (err)
+		goto out;
+
+	err = ext4_generic_delete_entry(handle, dir, de_del, bh,
+					inline_start, inline_size, 0);
+	if (err)
+		goto out;
+
+	BUFFER_TRACE(bh, "call ext4_handle_dirty_metadata");
+	err = ext4_mark_inode_dirty(handle, dir);
+	if (unlikely(err))
+		goto out;
+
+	ext4_show_inline_dir(dir, iloc.bh, inline_start, inline_size);
+out:
+	up_write(&EXT4_I(dir)->xattr_sem);
+	brelse(iloc.bh);
+	if (err != -ENOENT)
+		ext4_std_error(dir->i_sb, err);
+	return err;
+}
+
+/*
+ * Get the inline dentry at offset.
+ */
+static inline struct ext4_dir_entry_2 *
+ext4_get_inline_entry(struct inode *inode,
+		      struct ext4_iloc *iloc,
+		      unsigned int offset,
+		      void **inline_start,
+		      int *inline_size)
+{
+	void *inline_pos;
+
+	BUG_ON(offset > ext4_get_inline_size(inode));
+
+	if (offset < EXT4_MIN_INLINE_DATA_SIZE) {
+		inline_pos = (void *)ext4_raw_inode(iloc)->i_block;
+		*inline_size = EXT4_MIN_INLINE_DATA_SIZE;
+	} else {
+		inline_pos = ext4_get_inline_xattr_pos(inode, iloc);
+		offset -= EXT4_MIN_INLINE_DATA_SIZE;
+		*inline_size = ext4_get_inline_size(inode) -
+				EXT4_MIN_INLINE_DATA_SIZE;
+	}
+
+	if (inline_start)
+		*inline_start = inline_pos;
+	return (struct ext4_dir_entry_2 *)(inline_pos + offset);
+}
+
+int empty_inline_dir(struct inode *dir, int *has_inline_data)
+{
+	int err, inline_size;
+	struct ext4_iloc iloc;
+	void *inline_pos;
+	unsigned int offset;
+	struct ext4_dir_entry_2 *de;
+	int ret = 1;
+
+	err = ext4_get_inode_loc(dir, &iloc);
+	if (err) {
+		EXT4_ERROR_INODE(dir, "error %d getting inode %lu block",
+				 err, dir->i_ino);
+		return 1;
+	}
+
+	down_read(&EXT4_I(dir)->xattr_sem);
+	if (!ext4_has_inline_data(dir)) {
+		*has_inline_data = 0;
+		goto out;
+	}
+
+	de = (struct ext4_dir_entry_2 *)ext4_raw_inode(&iloc)->i_block;
+	if (!le32_to_cpu(de->inode)) {
+		ext4_warning(dir->i_sb,
+			     "bad inline directory (dir #%lu) - no `..'",
+			     dir->i_ino);
+		ret = 1;
+		goto out;
+	}
+
+	offset = EXT4_INLINE_DOTDOT_SIZE;
+	while (offset < dir->i_size) {
+		de = ext4_get_inline_entry(dir, &iloc, offset,
+					   &inline_pos, &inline_size);
+		if (ext4_check_dir_entry(dir, NULL, de,
+					 iloc.bh, inline_pos,
+					 inline_size, offset)) {
+			ext4_warning(dir->i_sb,
+				     "bad inline directory (dir #%lu) - "
+				     "inode %u, rec_len %u, name_len %d"
+				     "inline size %d\n",
+				     dir->i_ino, le32_to_cpu(de->inode),
+				     le16_to_cpu(de->rec_len), de->name_len,
+				     inline_size);
+			ret = 1;
+			goto out;
+		}
+		if (le32_to_cpu(de->inode)) {
+			ret = 0;
+			goto out;
+		}
+		offset += ext4_rec_len_from_disk(de->rec_len, inline_size);
+	}
+
+out:
+	up_read(&EXT4_I(dir)->xattr_sem);
+	brelse(iloc.bh);
+	return ret;
+}
+
+int ext4_destroy_inline_data(handle_t *handle, struct inode *inode)
+{
+	int ret;
+
+	down_write(&EXT4_I(inode)->xattr_sem);
+	ret = ext4_destroy_inline_data_nolock(handle, inode);
+	up_write(&EXT4_I(inode)->xattr_sem);
+
+	return ret;
+}
+
+int ext4_inline_data_fiemap(struct inode *inode,
+			    struct fiemap_extent_info *fieinfo,
+			    int *has_inline)
+{
+	__u64 physical = 0;
+	__u64 length;
+	__u32 flags = FIEMAP_EXTENT_DATA_INLINE | FIEMAP_EXTENT_LAST;
+	int error = 0;
+	struct ext4_iloc iloc;
+
+	down_read(&EXT4_I(inode)->xattr_sem);
+	if (!ext4_has_inline_data(inode)) {
+		*has_inline = 0;
+		goto out;
+	}
+
+	error = ext4_get_inode_loc(inode, &iloc);
+	if (error)
+		goto out;
+
+	physical = iloc.bh->b_blocknr << inode->i_sb->s_blocksize_bits;
+	physical += (char *)ext4_raw_inode(&iloc) - iloc.bh->b_data;
+	physical += offsetof(struct ext4_inode, i_block);
+	length = i_size_read(inode);
+
+	if (physical)
+		error = fiemap_fill_next_extent(fieinfo, 0, physical,
+						length, flags);
+	brelse(iloc.bh);
+out:
+	up_read(&EXT4_I(inode)->xattr_sem);
+	return (error < 0 ? error : 0);
+}
+
+/*
+ * Called during xattr set, and if we can sparse space 'needed',
+ * just create the extent tree evict the data to the outer block.
+ *
+ * We use jbd2 instead of page cache to move data to the 1st block
+ * so that the whole transaction can be committed as a whole and
+ * the data isn't lost because of the delayed page cache write.
+ */
+int ext4_try_to_evict_inline_data(handle_t *handle,
+				  struct inode *inode,
+				  int needed)
+{
+	int error;
+	struct ext4_xattr_entry *entry;
+	struct ext4_xattr_ibody_header *header;
+	struct ext4_inode *raw_inode;
+	struct ext4_iloc iloc;
+
+	error = ext4_get_inode_loc(inode, &iloc);
+	if (error)
+		return error;
+
+	raw_inode = ext4_raw_inode(&iloc);
+	header = IHDR(inode, raw_inode);
+	entry = (struct ext4_xattr_entry *)((void *)raw_inode +
+					    EXT4_I(inode)->i_inline_off);
+	if (EXT4_XATTR_LEN(entry->e_name_len) +
+	    EXT4_XATTR_SIZE(le32_to_cpu(entry->e_value_size)) < needed) {
+		error = -ENOSPC;
+		goto out;
+	}
+
+	error = ext4_convert_inline_data_nolock(handle, inode, &iloc);
+out:
+	brelse(iloc.bh);
+	return error;
+}
+
+void ext4_inline_data_truncate(struct inode *inode, int *has_inline)
+{
+	handle_t *handle;
+	int inline_size, value_len, needed_blocks;
+	size_t i_size;
+	void *value = NULL;
+	struct ext4_xattr_ibody_find is = {
+		.s = { .not_found = -ENODATA, },
+	};
+	struct ext4_xattr_info i = {
+		.name_index = EXT4_XATTR_INDEX_SYSTEM,
+		.name = EXT4_XATTR_SYSTEM_DATA,
+	};
+
+
+	needed_blocks = ext4_writepage_trans_blocks(inode);
+	handle = ext4_journal_start(inode, needed_blocks);
+	if (IS_ERR(handle))
+		return;
+
+	down_write(&EXT4_I(inode)->xattr_sem);
+	if (!ext4_has_inline_data(inode)) {
+		*has_inline = 0;
+		ext4_journal_stop(handle);
+		return;
+	}
+
+	if (ext4_orphan_add(handle, inode))
+		goto out;
+
+	if (ext4_get_inode_loc(inode, &is.iloc))
+		goto out;
+
+	down_write(&EXT4_I(inode)->i_data_sem);
+	i_size = inode->i_size;
+	inline_size = ext4_get_inline_size(inode);
+	EXT4_I(inode)->i_disksize = i_size;
+
+	if (i_size < inline_size) {
+		/* Clear the content in the xattr space. */
+		if (inline_size > EXT4_MIN_INLINE_DATA_SIZE) {
+			if (ext4_xattr_ibody_find(inode, &i, &is))
+				goto out_error;
+
+			BUG_ON(is.s.not_found);
+
+			value_len = le32_to_cpu(is.s.here->e_value_size);
+			value = kmalloc(value_len, GFP_NOFS);
+			if (!value)
+				goto out_error;
+
+			if (ext4_xattr_ibody_get(inode, i.name_index, i.name,
+						value, value_len))
+				goto out_error;
+
+			i.value = value;
+			i.value_len = i_size > EXT4_MIN_INLINE_DATA_SIZE ?
+					i_size - EXT4_MIN_INLINE_DATA_SIZE : 0;
+			if (ext4_xattr_ibody_inline_set(handle, inode, &i, &is))
+				goto out_error;
+		}
+
+		/* Clear the content within i_blocks. */
+		if (i_size < EXT4_MIN_INLINE_DATA_SIZE)
+			memset(ext4_raw_inode(&is.iloc)->i_block + i_size, 0,
+					EXT4_MIN_INLINE_DATA_SIZE - i_size);
+
+		EXT4_I(inode)->i_inline_size = i_size <
+					EXT4_MIN_INLINE_DATA_SIZE ?
+					EXT4_MIN_INLINE_DATA_SIZE : i_size;
+	}
+
+out_error:
+	up_write(&EXT4_I(inode)->i_data_sem);
+out:
+	brelse(is.iloc.bh);
+	up_write(&EXT4_I(inode)->xattr_sem);
+	kfree(value);
+	if (inode->i_nlink)
+		ext4_orphan_del(handle, inode);
+
+	inode->i_mtime = inode->i_ctime = ext4_current_time(inode);
+	ext4_mark_inode_dirty(handle, inode);
+	if (IS_SYNC(inode))
+		ext4_handle_sync(handle);
+
+	ext4_journal_stop(handle);
+	return;
+}
+
+int ext4_convert_inline_data(struct inode *inode)
+{
+	int error, needed_blocks;
+	handle_t *handle;
+	struct ext4_iloc iloc;
+
+	if (!ext4_has_inline_data(inode)) {
+		ext4_clear_inode_state(inode, EXT4_STATE_MAY_INLINE_DATA);
+		return 0;
+	}
+
+	needed_blocks = ext4_writepage_trans_blocks(inode);
+
+	iloc.bh = NULL;
+	error = ext4_get_inode_loc(inode, &iloc);
+	if (error)
+		return error;
+
+	handle = ext4_journal_start(inode, needed_blocks);
+	if (IS_ERR(handle)) {
+		error = PTR_ERR(handle);
+		goto out_free;
+	}
+
+	down_write(&EXT4_I(inode)->xattr_sem);
+	if (!ext4_has_inline_data(inode)) {
+		up_write(&EXT4_I(inode)->xattr_sem);
+		goto out;
+	}
+
+	error = ext4_convert_inline_data_nolock(handle, inode, &iloc);
+	up_write(&EXT4_I(inode)->xattr_sem);
+out:
+	ext4_journal_stop(handle);
+out_free:
+	brelse(iloc.bh);
+	return error;
+}
diff --git a/fs/ext4/inode.c b/fs/ext4/inode.c
index b3c243b..cb1c1ab 100644
--- a/fs/ext4/inode.c
+++ b/fs/ext4/inode.c
@@ -484,49 +484,6 @@
 }
 
 /*
- * Sets the BH_Da_Mapped bit on the buffer heads corresponding to the given map.
- */
-static void set_buffers_da_mapped(struct inode *inode,
-				   struct ext4_map_blocks *map)
-{
-	struct address_space *mapping = inode->i_mapping;
-	struct pagevec pvec;
-	int i, nr_pages;
-	pgoff_t index, end;
-
-	index = map->m_lblk >> (PAGE_CACHE_SHIFT - inode->i_blkbits);
-	end = (map->m_lblk + map->m_len - 1) >>
-		(PAGE_CACHE_SHIFT - inode->i_blkbits);
-
-	pagevec_init(&pvec, 0);
-	while (index <= end) {
-		nr_pages = pagevec_lookup(&pvec, mapping, index,
-					  min(end - index + 1,
-					      (pgoff_t)PAGEVEC_SIZE));
-		if (nr_pages == 0)
-			break;
-		for (i = 0; i < nr_pages; i++) {
-			struct page *page = pvec.pages[i];
-			struct buffer_head *bh, *head;
-
-			if (unlikely(page->mapping != mapping) ||
-			    !PageDirty(page))
-				break;
-
-			if (page_has_buffers(page)) {
-				bh = head = page_buffers(page);
-				do {
-					set_buffer_da_mapped(bh);
-					bh = bh->b_this_page;
-				} while (bh != head);
-			}
-			index++;
-		}
-		pagevec_release(&pvec);
-	}
-}
-
-/*
  * The ext4_map_blocks() function tries to look up the requested blocks,
  * and returns if the blocks are already mapped.
  *
@@ -574,7 +531,16 @@
 		up_read((&EXT4_I(inode)->i_data_sem));
 
 	if (retval > 0 && map->m_flags & EXT4_MAP_MAPPED) {
-		int ret = check_block_validity(inode, map);
+		int ret;
+		if (flags & EXT4_GET_BLOCKS_DELALLOC_RESERVE) {
+			/* delayed alloc may be allocated by fallocate and
+			 * coverted to initialized by directIO.
+			 * we need to handle delayed extent here.
+			 */
+			down_write((&EXT4_I(inode)->i_data_sem));
+			goto delayed_mapped;
+		}
+		ret = check_block_validity(inode, map);
 		if (ret != 0)
 			return ret;
 	}
@@ -652,12 +618,15 @@
 	if (flags & EXT4_GET_BLOCKS_DELALLOC_RESERVE) {
 		ext4_clear_inode_state(inode, EXT4_STATE_DELALLOC_RESERVED);
 
-		/* If we have successfully mapped the delayed allocated blocks,
-		 * set the BH_Da_Mapped bit on them. Its important to do this
-		 * under the protection of i_data_sem.
-		 */
-		if (retval > 0 && map->m_flags & EXT4_MAP_MAPPED)
-			set_buffers_da_mapped(inode, map);
+		if (retval > 0 && map->m_flags & EXT4_MAP_MAPPED) {
+			int ret;
+delayed_mapped:
+			/* delayed allocation blocks has been allocated */
+			ret = ext4_es_remove_extent(inode, map->m_lblk,
+						    map->m_len);
+			if (ret < 0)
+				retval = ret;
+		}
 	}
 
 	up_write((&EXT4_I(inode)->i_data_sem));
@@ -680,10 +649,13 @@
 	int ret = 0, started = 0;
 	int dio_credits;
 
+	if (ext4_has_inline_data(inode))
+		return -ERANGE;
+
 	map.m_lblk = iblock;
 	map.m_len = bh->b_size >> inode->i_blkbits;
 
-	if (flags && !handle) {
+	if (flags && !(flags & EXT4_GET_BLOCKS_NO_LOCK) && !handle) {
 		/* Direct IO write... */
 		if (map.m_len > DIO_MAX_BLOCKS)
 			map.m_len = DIO_MAX_BLOCKS;
@@ -798,13 +770,13 @@
 	return NULL;
 }
 
-static int walk_page_buffers(handle_t *handle,
-			     struct buffer_head *head,
-			     unsigned from,
-			     unsigned to,
-			     int *partial,
-			     int (*fn)(handle_t *handle,
-				       struct buffer_head *bh))
+int ext4_walk_page_buffers(handle_t *handle,
+			   struct buffer_head *head,
+			   unsigned from,
+			   unsigned to,
+			   int *partial,
+			   int (*fn)(handle_t *handle,
+				     struct buffer_head *bh))
 {
 	struct buffer_head *bh;
 	unsigned block_start, block_end;
@@ -854,8 +826,8 @@
  * is elevated.  We'll still have enough credits for the tiny quotafile
  * write.
  */
-static int do_journal_get_write_access(handle_t *handle,
-				       struct buffer_head *bh)
+int do_journal_get_write_access(handle_t *handle,
+				struct buffer_head *bh)
 {
 	int dirty = buffer_dirty(bh);
 	int ret;
@@ -878,7 +850,7 @@
 	return ret;
 }
 
-static int ext4_get_block_write(struct inode *inode, sector_t iblock,
+static int ext4_get_block_write_nolock(struct inode *inode, sector_t iblock,
 		   struct buffer_head *bh_result, int create);
 static int ext4_write_begin(struct file *file, struct address_space *mapping,
 			    loff_t pos, unsigned len, unsigned flags,
@@ -902,6 +874,17 @@
 	from = pos & (PAGE_CACHE_SIZE - 1);
 	to = from + len;
 
+	if (ext4_test_inode_state(inode, EXT4_STATE_MAY_INLINE_DATA)) {
+		ret = ext4_try_to_write_inline_data(mapping, inode, pos, len,
+						    flags, pagep);
+		if (ret < 0)
+			goto out;
+		if (ret == 1) {
+			ret = 0;
+			goto out;
+		}
+	}
+
 retry:
 	handle = ext4_journal_start(inode, needed_blocks);
 	if (IS_ERR(handle)) {
@@ -919,6 +902,7 @@
 		ret = -ENOMEM;
 		goto out;
 	}
+
 	*pagep = page;
 
 	if (ext4_should_dioread_nolock(inode))
@@ -927,8 +911,9 @@
 		ret = __block_write_begin(page, pos, len, ext4_get_block);
 
 	if (!ret && ext4_should_journal_data(inode)) {
-		ret = walk_page_buffers(handle, page_buffers(page),
-				from, to, NULL, do_journal_get_write_access);
+		ret = ext4_walk_page_buffers(handle, page_buffers(page),
+					     from, to, NULL,
+					     do_journal_get_write_access);
 	}
 
 	if (ret) {
@@ -983,7 +968,12 @@
 	struct inode *inode = mapping->host;
 	handle_t *handle = ext4_journal_current_handle();
 
-	copied = block_write_end(file, mapping, pos, len, copied, page, fsdata);
+	if (ext4_has_inline_data(inode))
+		copied = ext4_write_inline_data_end(inode, pos, len,
+						    copied, page);
+	else
+		copied = block_write_end(file, mapping, pos,
+					 len, copied, page, fsdata);
 
 	/*
 	 * No need to use i_size_read() here, the i_size
@@ -1134,16 +1124,21 @@
 
 	BUG_ON(!ext4_handle_valid(handle));
 
-	if (copied < len) {
-		if (!PageUptodate(page))
-			copied = 0;
-		page_zero_new_buffers(page, from+copied, to);
-	}
+	if (ext4_has_inline_data(inode))
+		copied = ext4_write_inline_data_end(inode, pos, len,
+						    copied, page);
+	else {
+		if (copied < len) {
+			if (!PageUptodate(page))
+				copied = 0;
+			page_zero_new_buffers(page, from+copied, to);
+		}
 
-	ret = walk_page_buffers(handle, page_buffers(page), from,
-				to, &partial, write_end_fn);
-	if (!partial)
-		SetPageUptodate(page);
+		ret = ext4_walk_page_buffers(handle, page_buffers(page), from,
+					     to, &partial, write_end_fn);
+		if (!partial)
+			SetPageUptodate(page);
+	}
 	new_i_size = pos + copied;
 	if (new_i_size > inode->i_size)
 		i_size_write(inode, pos+copied);
@@ -1301,6 +1296,7 @@
 	struct inode *inode = page->mapping->host;
 	struct ext4_sb_info *sbi = EXT4_SB(inode->i_sb);
 	int num_clusters;
+	ext4_fsblk_t lblk;
 
 	head = page_buffers(page);
 	bh = head;
@@ -1310,20 +1306,23 @@
 		if ((offset <= curr_off) && (buffer_delay(bh))) {
 			to_release++;
 			clear_buffer_delay(bh);
-			clear_buffer_da_mapped(bh);
 		}
 		curr_off = next_off;
 	} while ((bh = bh->b_this_page) != head);
 
+	if (to_release) {
+		lblk = page->index << (PAGE_CACHE_SHIFT - inode->i_blkbits);
+		ext4_es_remove_extent(inode, lblk, to_release);
+	}
+
 	/* If we have released all the blocks belonging to a cluster, then we
 	 * need to release the reserved space for that cluster. */
 	num_clusters = EXT4_NUM_B2C(sbi, to_release);
 	while (num_clusters > 0) {
-		ext4_fsblk_t lblk;
 		lblk = (page->index << (PAGE_CACHE_SHIFT - inode->i_blkbits)) +
 			((num_clusters - 1) << sbi->s_cluster_bits);
 		if (sbi->s_cluster_ratio == 1 ||
-		    !ext4_find_delalloc_cluster(inode, lblk, 1))
+		    !ext4_find_delalloc_cluster(inode, lblk))
 			ext4_da_release_space(inode, 1);
 
 		num_clusters--;
@@ -1429,8 +1428,6 @@
 						clear_buffer_delay(bh);
 						bh->b_blocknr = pblock;
 					}
-					if (buffer_da_mapped(bh))
-						clear_buffer_da_mapped(bh);
 					if (buffer_unwritten(bh) ||
 					    buffer_mapped(bh))
 						BUG_ON(bh->b_blocknr != pblock);
@@ -1500,9 +1497,16 @@
 	struct pagevec pvec;
 	struct inode *inode = mpd->inode;
 	struct address_space *mapping = inode->i_mapping;
+	ext4_lblk_t start, last;
 
 	index = mpd->first_page;
 	end   = mpd->next_page - 1;
+
+	start = index << (PAGE_CACHE_SHIFT - inode->i_blkbits);
+	last = end << (PAGE_CACHE_SHIFT - inode->i_blkbits);
+	ext4_es_remove_extent(inode, start, last - start + 1);
+
+	pagevec_init(&pvec, 0);
 	while (index <= end) {
 		nr_pages = pagevec_lookup(&pvec, mapping, index, PAGEVEC_SIZE);
 		if (nr_pages == 0)
@@ -1656,15 +1660,6 @@
 
 		for (i = 0; i < map.m_len; i++)
 			unmap_underlying_metadata(bdev, map.m_pblk + i);
-
-		if (ext4_should_order_data(mpd->inode)) {
-			err = ext4_jbd2_file_inode(handle, mpd->inode);
-			if (err) {
-				/* Only if the journal is aborted */
-				mpd->retval = err;
-				goto submit_io;
-			}
-		}
 	}
 
 	/*
@@ -1795,7 +1790,19 @@
 	 * file system block.
 	 */
 	down_read((&EXT4_I(inode)->i_data_sem));
-	if (ext4_test_inode_flag(inode, EXT4_INODE_EXTENTS))
+	if (ext4_has_inline_data(inode)) {
+		/*
+		 * We will soon create blocks for this page, and let
+		 * us pretend as if the blocks aren't allocated yet.
+		 * In case of clusters, we have to handle the work
+		 * of mapping from cluster so that the reserved space
+		 * is calculated properly.
+		 */
+		if ((EXT4_SB(inode->i_sb)->s_cluster_ratio > 1) &&
+		    ext4_find_delalloc_cluster(inode, map->m_lblk))
+			map->m_flags |= EXT4_MAP_FROM_CLUSTER;
+		retval = 0;
+	} else if (ext4_test_inode_flag(inode, EXT4_INODE_EXTENTS))
 		retval = ext4_ext_map_blocks(NULL, inode, map, 0);
 	else
 		retval = ext4_ind_map_blocks(NULL, inode, map, 0);
@@ -1814,6 +1821,10 @@
 				goto out_unlock;
 		}
 
+		retval = ext4_es_insert_extent(inode, map->m_lblk, map->m_len);
+		if (retval)
+			goto out_unlock;
+
 		/* Clear EXT4_MAP_FROM_CLUSTER flag since its purpose is served
 		 * and it should not appear on the bh->b_state.
 		 */
@@ -1842,8 +1853,8 @@
  * We also have b_blocknr = physicalblock mapping unwritten extent and b_bdev
  * initialized properly.
  */
-static int ext4_da_get_block_prep(struct inode *inode, sector_t iblock,
-				  struct buffer_head *bh, int create)
+int ext4_da_get_block_prep(struct inode *inode, sector_t iblock,
+			   struct buffer_head *bh, int create)
 {
 	struct ext4_map_blocks map;
 	int ret = 0;
@@ -1917,15 +1928,29 @@
 {
 	struct address_space *mapping = page->mapping;
 	struct inode *inode = mapping->host;
-	struct buffer_head *page_bufs;
+	struct buffer_head *page_bufs = NULL;
 	handle_t *handle = NULL;
-	int ret = 0;
-	int err;
+	int ret = 0, err = 0;
+	int inline_data = ext4_has_inline_data(inode);
+	struct buffer_head *inode_bh = NULL;
 
 	ClearPageChecked(page);
-	page_bufs = page_buffers(page);
-	BUG_ON(!page_bufs);
-	walk_page_buffers(handle, page_bufs, 0, len, NULL, bget_one);
+
+	if (inline_data) {
+		BUG_ON(page->index != 0);
+		BUG_ON(len > ext4_get_max_inline_size(inode));
+		inode_bh = ext4_journalled_write_inline_data(inode, len, page);
+		if (inode_bh == NULL)
+			goto out;
+	} else {
+		page_bufs = page_buffers(page);
+		if (!page_bufs) {
+			BUG();
+			goto out;
+		}
+		ext4_walk_page_buffers(handle, page_bufs, 0, len,
+				       NULL, bget_one);
+	}
 	/* As soon as we unlock the page, it can go away, but we have
 	 * references to buffers so we are safe */
 	unlock_page(page);
@@ -1938,11 +1963,18 @@
 
 	BUG_ON(!ext4_handle_valid(handle));
 
-	ret = walk_page_buffers(handle, page_bufs, 0, len, NULL,
-				do_journal_get_write_access);
+	if (inline_data) {
+		ret = ext4_journal_get_write_access(handle, inode_bh);
 
-	err = walk_page_buffers(handle, page_bufs, 0, len, NULL,
-				write_end_fn);
+		err = ext4_handle_dirty_metadata(handle, inode, inode_bh);
+
+	} else {
+		ret = ext4_walk_page_buffers(handle, page_bufs, 0, len, NULL,
+					     do_journal_get_write_access);
+
+		err = ext4_walk_page_buffers(handle, page_bufs, 0, len, NULL,
+					     write_end_fn);
+	}
 	if (ret == 0)
 		ret = err;
 	EXT4_I(inode)->i_datasync_tid = handle->h_transaction->t_tid;
@@ -1950,9 +1982,12 @@
 	if (!ret)
 		ret = err;
 
-	walk_page_buffers(handle, page_bufs, 0, len, NULL, bput_one);
+	if (!ext4_has_inline_data(inode))
+		ext4_walk_page_buffers(handle, page_bufs, 0, len,
+				       NULL, bput_one);
 	ext4_set_inode_state(inode, EXT4_STATE_JDATA);
 out:
+	brelse(inode_bh);
 	return ret;
 }
 
@@ -2029,8 +2064,8 @@
 		commit_write = 1;
 	}
 	page_bufs = page_buffers(page);
-	if (walk_page_buffers(NULL, page_bufs, 0, len, NULL,
-			      ext4_bh_delay_or_unwritten)) {
+	if (ext4_walk_page_buffers(NULL, page_bufs, 0, len, NULL,
+				   ext4_bh_delay_or_unwritten)) {
 		/*
 		 * We don't want to do block allocation, so redirty
 		 * the page and return.  We may reach here when we do
@@ -2096,7 +2131,8 @@
  * mpage_da_map_and_submit to map a single contiguous memory region
  * and then write them.
  */
-static int write_cache_pages_da(struct address_space *mapping,
+static int write_cache_pages_da(handle_t *handle,
+				struct address_space *mapping,
 				struct writeback_control *wbc,
 				struct mpage_da_data *mpd,
 				pgoff_t *done_index)
@@ -2175,6 +2211,17 @@
 			wait_on_page_writeback(page);
 			BUG_ON(PageWriteback(page));
 
+			/*
+			 * If we have inline data and arrive here, it means that
+			 * we will soon create the block for the 1st page, so
+			 * we'd better clear the inline data here.
+			 */
+			if (ext4_has_inline_data(inode)) {
+				BUG_ON(ext4_test_inode_state(inode,
+						EXT4_STATE_MAY_INLINE_DATA));
+				ext4_destroy_inline_data(handle, inode);
+			}
+
 			if (mpd->next_page != page->index)
 				mpd->first_page = page->index;
 			mpd->next_page = page->index + 1;
@@ -2381,7 +2428,8 @@
 		 * contiguous region of logical blocks that need
 		 * blocks to be allocated by ext4 and submit them.
 		 */
-		ret = write_cache_pages_da(mapping, wbc, &mpd, &done_index);
+		ret = write_cache_pages_da(handle, mapping,
+					   wbc, &mpd, &done_index);
 		/*
 		 * If we have a contiguous extent of pages and we
 		 * haven't done the I/O yet, map the blocks and submit
@@ -2445,7 +2493,6 @@
 	return ret;
 }
 
-#define FALL_BACK_TO_NONDELALLOC 1
 static int ext4_nonda_switch(struct super_block *sb)
 {
 	s64 free_blocks, dirty_blocks;
@@ -2502,6 +2549,19 @@
 	}
 	*fsdata = (void *)0;
 	trace_ext4_da_write_begin(inode, pos, len, flags);
+
+	if (ext4_test_inode_state(inode, EXT4_STATE_MAY_INLINE_DATA)) {
+		ret = ext4_da_write_inline_data_begin(mapping, inode,
+						      pos, len, flags,
+						      pagep, fsdata);
+		if (ret < 0)
+			goto out;
+		if (ret == 1) {
+			ret = 0;
+			goto out;
+		}
+	}
+
 retry:
 	/*
 	 * With delayed allocation, we don't log the i_disksize update
@@ -2603,22 +2663,13 @@
 	 * changes.  So let's piggyback the i_disksize mark_inode_dirty
 	 * into that.
 	 */
-
 	new_i_size = pos + copied;
 	if (copied && new_i_size > EXT4_I(inode)->i_disksize) {
-		if (ext4_da_should_update_i_disksize(page, end)) {
+		if (ext4_has_inline_data(inode) ||
+		    ext4_da_should_update_i_disksize(page, end)) {
 			down_write(&EXT4_I(inode)->i_data_sem);
-			if (new_i_size > EXT4_I(inode)->i_disksize) {
-				/*
-				 * Updating i_disksize when extending file
-				 * without needing block allocation
-				 */
-				if (ext4_should_order_data(inode))
-					ret = ext4_jbd2_file_inode(handle,
-								   inode);
-
+			if (new_i_size > EXT4_I(inode)->i_disksize)
 				EXT4_I(inode)->i_disksize = new_i_size;
-			}
 			up_write(&EXT4_I(inode)->i_data_sem);
 			/* We need to mark inode dirty even if
 			 * new_i_size is less that inode->i_size
@@ -2627,8 +2678,16 @@
 			ext4_mark_inode_dirty(handle, inode);
 		}
 	}
-	ret2 = generic_write_end(file, mapping, pos, len, copied,
+
+	if (write_mode != CONVERT_INLINE_DATA &&
+	    ext4_test_inode_state(inode, EXT4_STATE_MAY_INLINE_DATA) &&
+	    ext4_has_inline_data(inode))
+		ret2 = ext4_da_write_inline_data_end(inode, pos, len, copied,
+						     page);
+	else
+		ret2 = generic_write_end(file, mapping, pos, len, copied,
 							page, fsdata);
+
 	copied = ret2;
 	if (ret2 < 0)
 		ret = ret2;
@@ -2721,6 +2780,12 @@
 	journal_t *journal;
 	int err;
 
+	/*
+	 * We can get here for an inline file via the FIBMAP ioctl
+	 */
+	if (ext4_has_inline_data(inode))
+		return 0;
+
 	if (mapping_tagged(mapping, PAGECACHE_TAG_DIRTY) &&
 			test_opt(inode->i_sb, DELALLOC)) {
 		/*
@@ -2766,14 +2831,30 @@
 
 static int ext4_readpage(struct file *file, struct page *page)
 {
+	int ret = -EAGAIN;
+	struct inode *inode = page->mapping->host;
+
 	trace_ext4_readpage(page);
-	return mpage_readpage(page, ext4_get_block);
+
+	if (ext4_has_inline_data(inode))
+		ret = ext4_readpage_inline(inode, page);
+
+	if (ret == -EAGAIN)
+		return mpage_readpage(page, ext4_get_block);
+
+	return ret;
 }
 
 static int
 ext4_readpages(struct file *file, struct address_space *mapping,
 		struct list_head *pages, unsigned nr_pages)
 {
+	struct inode *inode = mapping->host;
+
+	/* If the file has inline data, no need to do readpages. */
+	if (ext4_has_inline_data(inode))
+		return 0;
+
 	return mpage_readpages(mapping, pages, nr_pages, ext4_get_block);
 }
 
@@ -2840,7 +2921,7 @@
  * We allocate an uinitialized extent if blocks haven't been allocated.
  * The extent will be converted to initialized after the IO is complete.
  */
-static int ext4_get_block_write(struct inode *inode, sector_t iblock,
+int ext4_get_block_write(struct inode *inode, sector_t iblock,
 		   struct buffer_head *bh_result, int create)
 {
 	ext4_debug("ext4_get_block_write: inode %lu, create flag %d\n",
@@ -2850,29 +2931,12 @@
 }
 
 static int ext4_get_block_write_nolock(struct inode *inode, sector_t iblock,
-		   struct buffer_head *bh_result, int flags)
+		   struct buffer_head *bh_result, int create)
 {
-	handle_t *handle = ext4_journal_current_handle();
-	struct ext4_map_blocks map;
-	int ret = 0;
-
-	ext4_debug("ext4_get_block_write_nolock: inode %lu, flag %d\n",
-		   inode->i_ino, flags);
-
-	flags = EXT4_GET_BLOCKS_NO_LOCK;
-
-	map.m_lblk = iblock;
-	map.m_len = bh_result->b_size >> inode->i_blkbits;
-
-	ret = ext4_map_blocks(handle, inode, &map, flags);
-	if (ret > 0) {
-		map_bh(bh_result, inode->i_sb, map.m_pblk);
-		bh_result->b_state = (bh_result->b_state & ~EXT4_MAP_FLAGS) |
-					map.m_flags;
-		bh_result->b_size = inode->i_sb->s_blocksize * map.m_len;
-		ret = 0;
-	}
-	return ret;
+	ext4_debug("ext4_get_block_write_nolock: inode %lu, create flag %d\n",
+		   inode->i_ino, create);
+	return _ext4_get_block(inode, iblock, bh_result,
+			       EXT4_GET_BLOCKS_NO_LOCK);
 }
 
 static void ext4_end_io_dio(struct kiocb *iocb, loff_t offset,
@@ -2978,10 +3042,10 @@
  * fall back to buffered IO.
  *
  * For holes, we fallocate those blocks, mark them as uninitialized
- * If those blocks were preallocated, we mark sure they are splited, but
+ * If those blocks were preallocated, we mark sure they are split, but
  * still keep the range to write as uninitialized.
  *
- * The unwrritten extents will be converted to written when DIO is completed.
+ * The unwritten extents will be converted to written when DIO is completed.
  * For async direct IO, since the IO may still pending when return, we
  * set up an end_io call back function, which will do the conversion
  * when async direct IO completed.
@@ -2999,125 +3063,120 @@
 	struct inode *inode = file->f_mapping->host;
 	ssize_t ret;
 	size_t count = iov_length(iov, nr_segs);
-
+	int overwrite = 0;
+	get_block_t *get_block_func = NULL;
+	int dio_flags = 0;
 	loff_t final_size = offset + count;
-	if (rw == WRITE && final_size <= inode->i_size) {
-		int overwrite = 0;
 
-		BUG_ON(iocb->private == NULL);
+	/* Use the old path for reads and writes beyond i_size. */
+	if (rw != WRITE || final_size > inode->i_size)
+		return ext4_ind_direct_IO(rw, iocb, iov, offset, nr_segs);
 
-		/* If we do a overwrite dio, i_mutex locking can be released */
-		overwrite = *((int *)iocb->private);
+	BUG_ON(iocb->private == NULL);
 
-		if (overwrite) {
-			atomic_inc(&inode->i_dio_count);
-			down_read(&EXT4_I(inode)->i_data_sem);
-			mutex_unlock(&inode->i_mutex);
-		}
+	/* If we do a overwrite dio, i_mutex locking can be released */
+	overwrite = *((int *)iocb->private);
 
-		/*
- 		 * We could direct write to holes and fallocate.
-		 *
- 		 * Allocated blocks to fill the hole are marked as uninitialized
- 		 * to prevent parallel buffered read to expose the stale data
- 		 * before DIO complete the data IO.
-		 *
- 		 * As to previously fallocated extents, ext4 get_block
- 		 * will just simply mark the buffer mapped but still
- 		 * keep the extents uninitialized.
- 		 *
-		 * for non AIO case, we will convert those unwritten extents
-		 * to written after return back from blockdev_direct_IO.
-		 *
-		 * for async DIO, the conversion needs to be defered when
-		 * the IO is completed. The ext4 end_io callback function
-		 * will be called to take care of the conversion work.
-		 * Here for async case, we allocate an io_end structure to
-		 * hook to the iocb.
- 		 */
-		iocb->private = NULL;
-		ext4_inode_aio_set(inode, NULL);
-		if (!is_sync_kiocb(iocb)) {
-			ext4_io_end_t *io_end =
-				ext4_init_io_end(inode, GFP_NOFS);
-			if (!io_end) {
-				ret = -ENOMEM;
-				goto retake_lock;
-			}
-			io_end->flag |= EXT4_IO_END_DIRECT;
-			iocb->private = io_end;
-			/*
-			 * we save the io structure for current async
-			 * direct IO, so that later ext4_map_blocks()
-			 * could flag the io structure whether there
-			 * is a unwritten extents needs to be converted
-			 * when IO is completed.
-			 */
-			ext4_inode_aio_set(inode, io_end);
-		}
-
-		if (overwrite)
-			ret = __blockdev_direct_IO(rw, iocb, inode,
-						 inode->i_sb->s_bdev, iov,
-						 offset, nr_segs,
-						 ext4_get_block_write_nolock,
-						 ext4_end_io_dio,
-						 NULL,
-						 0);
-		else
-			ret = __blockdev_direct_IO(rw, iocb, inode,
-						 inode->i_sb->s_bdev, iov,
-						 offset, nr_segs,
-						 ext4_get_block_write,
-						 ext4_end_io_dio,
-						 NULL,
-						 DIO_LOCKING);
-		if (iocb->private)
-			ext4_inode_aio_set(inode, NULL);
-		/*
-		 * The io_end structure takes a reference to the inode,
-		 * that structure needs to be destroyed and the
-		 * reference to the inode need to be dropped, when IO is
-		 * complete, even with 0 byte write, or failed.
-		 *
-		 * In the successful AIO DIO case, the io_end structure will be
-		 * desctroyed and the reference to the inode will be dropped
-		 * after the end_io call back function is called.
-		 *
-		 * In the case there is 0 byte write, or error case, since
-		 * VFS direct IO won't invoke the end_io call back function,
-		 * we need to free the end_io structure here.
-		 */
-		if (ret != -EIOCBQUEUED && ret <= 0 && iocb->private) {
-			ext4_free_io_end(iocb->private);
-			iocb->private = NULL;
-		} else if (ret > 0 && !overwrite && ext4_test_inode_state(inode,
-						EXT4_STATE_DIO_UNWRITTEN)) {
-			int err;
-			/*
-			 * for non AIO case, since the IO is already
-			 * completed, we could do the conversion right here
-			 */
-			err = ext4_convert_unwritten_extents(inode,
-							     offset, ret);
-			if (err < 0)
-				ret = err;
-			ext4_clear_inode_state(inode, EXT4_STATE_DIO_UNWRITTEN);
-		}
-
-	retake_lock:
-		/* take i_mutex locking again if we do a ovewrite dio */
-		if (overwrite) {
-			inode_dio_done(inode);
-			up_read(&EXT4_I(inode)->i_data_sem);
-			mutex_lock(&inode->i_mutex);
-		}
-
-		return ret;
+	if (overwrite) {
+		atomic_inc(&inode->i_dio_count);
+		down_read(&EXT4_I(inode)->i_data_sem);
+		mutex_unlock(&inode->i_mutex);
 	}
 
-	/* for write the the end of file case, we fall back to old way */
-	return ext4_ind_direct_IO(rw, iocb, iov, offset, nr_segs);
+	/*
+	 * We could direct write to holes and fallocate.
+	 *
+	 * Allocated blocks to fill the hole are marked as
+	 * uninitialized to prevent parallel buffered read to expose
+	 * the stale data before DIO complete the data IO.
+	 *
+	 * As to previously fallocated extents, ext4 get_block will
+	 * just simply mark the buffer mapped but still keep the
+	 * extents uninitialized.
+	 *
+	 * For non AIO case, we will convert those unwritten extents
+	 * to written after return back from blockdev_direct_IO.
+	 *
+	 * For async DIO, the conversion needs to be deferred when the
+	 * IO is completed. The ext4 end_io callback function will be
+	 * called to take care of the conversion work.  Here for async
+	 * case, we allocate an io_end structure to hook to the iocb.
+	 */
+	iocb->private = NULL;
+	ext4_inode_aio_set(inode, NULL);
+	if (!is_sync_kiocb(iocb)) {
+		ext4_io_end_t *io_end = ext4_init_io_end(inode, GFP_NOFS);
+		if (!io_end) {
+			ret = -ENOMEM;
+			goto retake_lock;
+		}
+		io_end->flag |= EXT4_IO_END_DIRECT;
+		iocb->private = io_end;
+		/*
+		 * we save the io structure for current async direct
+		 * IO, so that later ext4_map_blocks() could flag the
+		 * io structure whether there is a unwritten extents
+		 * needs to be converted when IO is completed.
+		 */
+		ext4_inode_aio_set(inode, io_end);
+	}
+
+	if (overwrite) {
+		get_block_func = ext4_get_block_write_nolock;
+	} else {
+		get_block_func = ext4_get_block_write;
+		dio_flags = DIO_LOCKING;
+	}
+	ret = __blockdev_direct_IO(rw, iocb, inode,
+				   inode->i_sb->s_bdev, iov,
+				   offset, nr_segs,
+				   get_block_func,
+				   ext4_end_io_dio,
+				   NULL,
+				   dio_flags);
+
+	if (iocb->private)
+		ext4_inode_aio_set(inode, NULL);
+	/*
+	 * The io_end structure takes a reference to the inode, that
+	 * structure needs to be destroyed and the reference to the
+	 * inode need to be dropped, when IO is complete, even with 0
+	 * byte write, or failed.
+	 *
+	 * In the successful AIO DIO case, the io_end structure will
+	 * be destroyed and the reference to the inode will be dropped
+	 * after the end_io call back function is called.
+	 *
+	 * In the case there is 0 byte write, or error case, since VFS
+	 * direct IO won't invoke the end_io call back function, we
+	 * need to free the end_io structure here.
+	 */
+	if (ret != -EIOCBQUEUED && ret <= 0 && iocb->private) {
+		ext4_free_io_end(iocb->private);
+		iocb->private = NULL;
+	} else if (ret > 0 && !overwrite && ext4_test_inode_state(inode,
+						EXT4_STATE_DIO_UNWRITTEN)) {
+		int err;
+		/*
+		 * for non AIO case, since the IO is already
+		 * completed, we could do the conversion right here
+		 */
+		err = ext4_convert_unwritten_extents(inode,
+						     offset, ret);
+		if (err < 0)
+			ret = err;
+		ext4_clear_inode_state(inode, EXT4_STATE_DIO_UNWRITTEN);
+	}
+
+retake_lock:
+	/* take i_mutex locking again if we do a ovewrite dio */
+	if (overwrite) {
+		inode_dio_done(inode);
+		up_read(&EXT4_I(inode)->i_data_sem);
+		mutex_lock(&inode->i_mutex);
+	}
+
+	return ret;
 }
 
 static ssize_t ext4_direct_IO(int rw, struct kiocb *iocb,
@@ -3134,6 +3193,10 @@
 	if (ext4_should_journal_data(inode))
 		return 0;
 
+	/* Let buffer I/O handle the inline data case. */
+	if (ext4_has_inline_data(inode))
+		return 0;
+
 	trace_ext4_direct_IO_enter(inode, offset, iov_length(iov, nr_segs), rw);
 	if (ext4_test_inode_flag(inode, EXT4_INODE_EXTENTS))
 		ret = ext4_ext_direct_IO(rw, iocb, iov, offset, nr_segs);
@@ -3531,6 +3594,14 @@
 	if (inode->i_size == 0 && !test_opt(inode->i_sb, NO_AUTO_DA_ALLOC))
 		ext4_set_inode_state(inode, EXT4_STATE_DA_ALLOC_CLOSE);
 
+	if (ext4_has_inline_data(inode)) {
+		int has_inline = 1;
+
+		ext4_inline_data_truncate(inode, &has_inline);
+		if (has_inline)
+			return;
+	}
+
 	if (ext4_test_inode_flag(inode, EXT4_INODE_EXTENTS))
 		ext4_ext_truncate(inode);
 	else
@@ -3756,6 +3827,19 @@
 	}
 }
 
+static inline void ext4_iget_extra_inode(struct inode *inode,
+					 struct ext4_inode *raw_inode,
+					 struct ext4_inode_info *ei)
+{
+	__le32 *magic = (void *)raw_inode +
+			EXT4_GOOD_OLD_INODE_SIZE + ei->i_extra_isize;
+	if (*magic == cpu_to_le32(EXT4_XATTR_MAGIC)) {
+		ext4_set_inode_state(inode, EXT4_STATE_XATTR);
+		ext4_find_inline_data_nolock(inode);
+	} else
+		EXT4_I(inode)->i_inline_off = 0;
+}
+
 struct inode *ext4_iget(struct super_block *sb, unsigned long ino)
 {
 	struct ext4_iloc iloc;
@@ -3826,6 +3910,7 @@
 	set_nlink(inode, le16_to_cpu(raw_inode->i_links_count));
 
 	ext4_clear_state_flags(ei);	/* Only relevant on 32-bit archs */
+	ei->i_inline_off = 0;
 	ei->i_dir_start_lookup = 0;
 	ei->i_dtime = le32_to_cpu(raw_inode->i_dtime);
 	/* We now have enough fields to check if the inode was active or not.
@@ -3898,11 +3983,7 @@
 			ei->i_extra_isize = sizeof(struct ext4_inode) -
 					    EXT4_GOOD_OLD_INODE_SIZE;
 		} else {
-			__le32 *magic = (void *)raw_inode +
-					EXT4_GOOD_OLD_INODE_SIZE +
-					ei->i_extra_isize;
-			if (*magic == cpu_to_le32(EXT4_XATTR_MAGIC))
-				ext4_set_inode_state(inode, EXT4_STATE_XATTR);
+			ext4_iget_extra_inode(inode, raw_inode, ei);
 		}
 	}
 
@@ -3925,17 +4006,19 @@
 				 ei->i_file_acl);
 		ret = -EIO;
 		goto bad_inode;
-	} else if (ext4_test_inode_flag(inode, EXT4_INODE_EXTENTS)) {
-		if (S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode) ||
-		    (S_ISLNK(inode->i_mode) &&
-		     !ext4_inode_is_fast_symlink(inode)))
-			/* Validate extent which is part of inode */
-			ret = ext4_ext_check_inode(inode);
-	} else if (S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode) ||
-		   (S_ISLNK(inode->i_mode) &&
-		    !ext4_inode_is_fast_symlink(inode))) {
-		/* Validate block references which are part of inode */
-		ret = ext4_ind_check_inode(inode);
+	} else if (!ext4_has_inline_data(inode)) {
+		if (ext4_test_inode_flag(inode, EXT4_INODE_EXTENTS)) {
+			if ((S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode) ||
+			    (S_ISLNK(inode->i_mode) &&
+			     !ext4_inode_is_fast_symlink(inode))))
+				/* Validate extent which is part of inode */
+				ret = ext4_ext_check_inode(inode);
+		} else if (S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode) ||
+			   (S_ISLNK(inode->i_mode) &&
+			    !ext4_inode_is_fast_symlink(inode))) {
+			/* Validate block references which are part of inode */
+			ret = ext4_ind_check_inode(inode);
+		}
 	}
 	if (ret)
 		goto bad_inode;
@@ -4122,9 +4205,10 @@
 				cpu_to_le32(new_encode_dev(inode->i_rdev));
 			raw_inode->i_block[2] = 0;
 		}
-	} else
+	} else if (!ext4_has_inline_data(inode)) {
 		for (block = 0; block < EXT4_N_BLOCKS; block++)
 			raw_inode->i_block[block] = ei->i_data[block];
+	}
 
 	raw_inode->i_disk_version = cpu_to_le32(inode->i_version);
 	if (ei->i_extra_isize) {
@@ -4811,8 +4895,9 @@
 	 * journal_start/journal_stop which can block and take a long time
 	 */
 	if (page_has_buffers(page)) {
-		if (!walk_page_buffers(NULL, page_buffers(page), 0, len, NULL,
-					ext4_bh_unmapped)) {
+		if (!ext4_walk_page_buffers(NULL, page_buffers(page),
+					    0, len, NULL,
+					    ext4_bh_unmapped)) {
 			/* Wait so that we don't change page under IO */
 			wait_on_page_writeback(page);
 			ret = VM_FAULT_LOCKED;
@@ -4833,7 +4918,7 @@
 	}
 	ret = __block_page_mkwrite(vma, vmf, get_block);
 	if (!ret && ext4_should_journal_data(inode)) {
-		if (walk_page_buffers(handle, page_buffers(page), 0,
+		if (ext4_walk_page_buffers(handle, page_buffers(page), 0,
 			  PAGE_CACHE_SIZE, NULL, do_journal_get_write_access)) {
 			unlock_page(page);
 			ret = VM_FAULT_SIGBUS;
diff --git a/fs/ext4/mballoc.c b/fs/ext4/mballoc.c
index 526e553..1bf6fe7 100644
--- a/fs/ext4/mballoc.c
+++ b/fs/ext4/mballoc.c
@@ -1373,7 +1373,7 @@
 	ex->fe_start += next;
 
 	while (needed > ex->fe_len &&
-	       (buddy = mb_find_buddy(e4b, order, &max))) {
+	       mb_find_buddy(e4b, order, &max)) {
 
 		if (block + 1 >= max)
 			break;
@@ -2607,9 +2607,17 @@
 	mb_debug(1, "gonna free %u blocks in group %u (0x%p):",
 		 entry->efd_count, entry->efd_group, entry);
 
-	if (test_opt(sb, DISCARD))
-		ext4_issue_discard(sb, entry->efd_group,
-				   entry->efd_start_cluster, entry->efd_count);
+	if (test_opt(sb, DISCARD)) {
+		err = ext4_issue_discard(sb, entry->efd_group,
+					 entry->efd_start_cluster,
+					 entry->efd_count);
+		if (err && err != -EOPNOTSUPP)
+			ext4_msg(sb, KERN_WARNING, "discard request in"
+				 " group:%d block:%d count:%d failed"
+				 " with %d", entry->efd_group,
+				 entry->efd_start_cluster,
+				 entry->efd_count, err);
+	}
 
 	err = ext4_mb_load_buddy(sb, entry->efd_group, &e4b);
 	/* we expect to find existing buddy because it's pinned */
@@ -4310,8 +4318,10 @@
 repeat:
 		/* allocate space in core */
 		*errp = ext4_mb_regular_allocator(ac);
-		if (*errp)
+		if (*errp) {
+			ext4_discard_allocated_blocks(ac);
 			goto errout;
+		}
 
 		/* as we've just preallocated more space than
 		 * user requested orinally, we store allocated
@@ -4333,10 +4343,10 @@
 			ac->ac_b_ex.fe_len = 0;
 			ac->ac_status = AC_STATUS_CONTINUE;
 			goto repeat;
-		} else if (*errp)
-		errout:
+		} else if (*errp) {
 			ext4_discard_allocated_blocks(ac);
-		else {
+			goto errout;
+		} else {
 			block = ext4_grp_offs_to_block(sb, &ac->ac_b_ex);
 			ar->len = ac->ac_b_ex.fe_len;
 		}
@@ -4347,6 +4357,7 @@
 		*errp = -ENOSPC;
 	}
 
+errout:
 	if (*errp) {
 		ac->ac_b_ex.fe_len = 0;
 		ar->len = 0;
@@ -4656,8 +4667,16 @@
 		 * with group lock held. generate_buddy look at
 		 * them with group lock_held
 		 */
-		if (test_opt(sb, DISCARD))
-			ext4_issue_discard(sb, block_group, bit, count);
+		if (test_opt(sb, DISCARD)) {
+			err = ext4_issue_discard(sb, block_group, bit, count);
+			if (err && err != -EOPNOTSUPP)
+				ext4_msg(sb, KERN_WARNING, "discard request in"
+					 " group:%d block:%d count:%lu failed"
+					 " with %d", block_group, bit, count,
+					 err);
+		}
+
+
 		ext4_lock_group(sb, block_group);
 		mb_clear_bits(bitmap_bh->b_data, bit, count_clusters);
 		mb_free_blocks(inode, &e4b, bit, count_clusters);
@@ -4851,10 +4870,11 @@
  * one will allocate those blocks, mark it as used in buddy bitmap. This must
  * be called with under the group lock.
  */
-static void ext4_trim_extent(struct super_block *sb, int start, int count,
+static int ext4_trim_extent(struct super_block *sb, int start, int count,
 			     ext4_group_t group, struct ext4_buddy *e4b)
 {
 	struct ext4_free_extent ex;
+	int ret = 0;
 
 	trace_ext4_trim_extent(sb, group, start, count);
 
@@ -4870,9 +4890,10 @@
 	 */
 	mb_mark_used(e4b, &ex);
 	ext4_unlock_group(sb, group);
-	ext4_issue_discard(sb, group, start, count);
+	ret = ext4_issue_discard(sb, group, start, count);
 	ext4_lock_group(sb, group);
 	mb_free_blocks(NULL, e4b, start, ex.fe_len);
+	return ret;
 }
 
 /**
@@ -4901,7 +4922,7 @@
 	void *bitmap;
 	ext4_grpblk_t next, count = 0, free_count = 0;
 	struct ext4_buddy e4b;
-	int ret;
+	int ret = 0;
 
 	trace_ext4_trim_all_free(sb, group, start, max);
 
@@ -4928,8 +4949,11 @@
 		next = mb_find_next_bit(bitmap, max + 1, start);
 
 		if ((next - start) >= minblocks) {
-			ext4_trim_extent(sb, start,
-					 next - start, group, &e4b);
+			ret = ext4_trim_extent(sb, start,
+					       next - start, group, &e4b);
+			if (ret && ret != -EOPNOTSUPP)
+				break;
+			ret = 0;
 			count += next - start;
 		}
 		free_count += next - start;
@@ -4950,8 +4974,10 @@
 			break;
 	}
 
-	if (!ret)
+	if (!ret) {
+		ret = count;
 		EXT4_MB_GRP_SET_TRIMMED(e4b.bd_info);
+	}
 out:
 	ext4_unlock_group(sb, group);
 	ext4_mb_unload_buddy(&e4b);
@@ -4959,7 +4985,7 @@
 	ext4_debug("trimmed %d blocks in the group %d\n",
 		count, group);
 
-	return count;
+	return ret;
 }
 
 /**
diff --git a/fs/ext4/migrate.c b/fs/ext4/migrate.c
index f1bb32e..db8226d 100644
--- a/fs/ext4/migrate.c
+++ b/fs/ext4/migrate.c
@@ -14,6 +14,7 @@
 
 #include <linux/slab.h>
 #include "ext4_jbd2.h"
+#include "ext4_extents.h"
 
 /*
  * The contiguous blocks details which can be
diff --git a/fs/ext4/move_extent.c b/fs/ext4/move_extent.c
index 292daee..d9cc5ee 100644
--- a/fs/ext4/move_extent.c
+++ b/fs/ext4/move_extent.c
@@ -18,6 +18,7 @@
 #include <linux/slab.h>
 #include "ext4_jbd2.h"
 #include "ext4.h"
+#include "ext4_extents.h"
 
 /**
  * get_ext_path - Find an extent path for designated logical block number.
diff --git a/fs/ext4/namei.c b/fs/ext4/namei.c
index 6d600a6..cac4482 100644
--- a/fs/ext4/namei.c
+++ b/fs/ext4/namei.c
@@ -202,13 +202,8 @@
 			     struct inode *inode);
 
 /* checksumming functions */
-#define EXT4_DIRENT_TAIL(block, blocksize) \
-	((struct ext4_dir_entry_tail *)(((void *)(block)) + \
-					((blocksize) - \
-					 sizeof(struct ext4_dir_entry_tail))))
-
-static void initialize_dirent_tail(struct ext4_dir_entry_tail *t,
-				   unsigned int blocksize)
+void initialize_dirent_tail(struct ext4_dir_entry_tail *t,
+			    unsigned int blocksize)
 {
 	memset(t, 0, sizeof(struct ext4_dir_entry_tail));
 	t->det_rec_len = ext4_rec_len_to_disk(
@@ -261,6 +256,12 @@
 	return cpu_to_le32(csum);
 }
 
+static void warn_no_space_for_csum(struct inode *inode)
+{
+	ext4_warning(inode->i_sb, "no space in directory inode %lu leaf for "
+		     "checksum.  Please run e2fsck -D.", inode->i_ino);
+}
+
 int ext4_dirent_csum_verify(struct inode *inode, struct ext4_dir_entry *dirent)
 {
 	struct ext4_dir_entry_tail *t;
@@ -271,8 +272,7 @@
 
 	t = get_dirent_tail(inode, dirent);
 	if (!t) {
-		EXT4_ERROR_INODE(inode, "metadata_csum set but no space in dir "
-				 "leaf for checksum.  Please run e2fsck -D.");
+		warn_no_space_for_csum(inode);
 		return 0;
 	}
 
@@ -294,8 +294,7 @@
 
 	t = get_dirent_tail(inode, dirent);
 	if (!t) {
-		EXT4_ERROR_INODE(inode, "metadata_csum set but no space in dir "
-				 "leaf for checksum.  Please run e2fsck -D.");
+		warn_no_space_for_csum(inode);
 		return;
 	}
 
@@ -303,9 +302,9 @@
 					   (void *)t - (void *)dirent);
 }
 
-static inline int ext4_handle_dirty_dirent_node(handle_t *handle,
-						struct inode *inode,
-						struct buffer_head *bh)
+int ext4_handle_dirty_dirent_node(handle_t *handle,
+				  struct inode *inode,
+				  struct buffer_head *bh)
 {
 	ext4_dirent_csum_set(inode, (struct ext4_dir_entry *)bh->b_data);
 	return ext4_handle_dirty_metadata(handle, inode, bh);
@@ -377,8 +376,7 @@
 	count = le16_to_cpu(c->count);
 	if (count_offset + (limit * sizeof(struct dx_entry)) >
 	    EXT4_BLOCK_SIZE(inode->i_sb) - sizeof(struct dx_tail)) {
-		EXT4_ERROR_INODE(inode, "metadata_csum set but no space for "
-				 "tree checksum found.  Run e2fsck -D.");
+		warn_no_space_for_csum(inode);
 		return 1;
 	}
 	t = (struct dx_tail *)(((struct dx_entry *)c) + limit);
@@ -408,8 +406,7 @@
 	count = le16_to_cpu(c->count);
 	if (count_offset + (limit * sizeof(struct dx_entry)) >
 	    EXT4_BLOCK_SIZE(inode->i_sb) - sizeof(struct dx_tail)) {
-		EXT4_ERROR_INODE(inode, "metadata_csum set but no space for "
-				 "tree checksum.  Run e2fsck -D.");
+		warn_no_space_for_csum(inode);
 		return;
 	}
 	t = (struct dx_tail *)(((struct dx_entry *)c) + limit);
@@ -890,6 +887,7 @@
 					   EXT4_DIR_REC_LEN(0));
 	for (; de < top; de = ext4_next_entry(de, dir->i_sb->s_blocksize)) {
 		if (ext4_check_dir_entry(dir, NULL, de, bh,
+				bh->b_data, bh->b_size,
 				(block<<EXT4_BLOCK_SIZE_BITS(dir->i_sb))
 					 + ((char *)de - bh->b_data))) {
 			/* On error, skip the f_pos to the next block. */
@@ -1007,6 +1005,15 @@
 	return (err);
 }
 
+static inline int search_dirblock(struct buffer_head *bh,
+				  struct inode *dir,
+				  const struct qstr *d_name,
+				  unsigned int offset,
+				  struct ext4_dir_entry_2 **res_dir)
+{
+	return search_dir(bh, bh->b_data, dir->i_sb->s_blocksize, dir,
+			  d_name, offset, res_dir);
+}
 
 /*
  * Directory block splitting, compacting
@@ -1081,13 +1088,6 @@
 	dx_set_count(entries, count + 1);
 }
 
-static void ext4_update_dx_flag(struct inode *inode)
-{
-	if (!EXT4_HAS_COMPAT_FEATURE(inode->i_sb,
-				     EXT4_FEATURE_COMPAT_DIR_INDEX))
-		ext4_clear_inode_flag(inode, EXT4_INODE_INDEX);
-}
-
 /*
  * NOTE! unlike strncmp, ext4_match returns 1 for success, 0 for failure.
  *
@@ -1107,11 +1107,13 @@
 /*
  * Returns 0 if not found, -1 on failure, and 1 on success
  */
-static inline int search_dirblock(struct buffer_head *bh,
-				  struct inode *dir,
-				  const struct qstr *d_name,
-				  unsigned int offset,
-				  struct ext4_dir_entry_2 ** res_dir)
+int search_dir(struct buffer_head *bh,
+	       char *search_buf,
+	       int buf_size,
+	       struct inode *dir,
+	       const struct qstr *d_name,
+	       unsigned int offset,
+	       struct ext4_dir_entry_2 **res_dir)
 {
 	struct ext4_dir_entry_2 * de;
 	char * dlimit;
@@ -1119,8 +1121,8 @@
 	const char *name = d_name->name;
 	int namelen = d_name->len;
 
-	de = (struct ext4_dir_entry_2 *) bh->b_data;
-	dlimit = bh->b_data + dir->i_sb->s_blocksize;
+	de = (struct ext4_dir_entry_2 *)search_buf;
+	dlimit = search_buf + buf_size;
 	while ((char *) de < dlimit) {
 		/* this code is executed quadratically often */
 		/* do minimal checking `by hand' */
@@ -1128,7 +1130,8 @@
 		if ((char *) de + namelen <= dlimit &&
 		    ext4_match (namelen, name, de)) {
 			/* found a match - just to be sure, do a full check */
-			if (ext4_check_dir_entry(dir, NULL, de, bh, offset))
+			if (ext4_check_dir_entry(dir, NULL, de, bh, bh->b_data,
+						 bh->b_size, offset))
 				return -1;
 			*res_dir = de;
 			return 1;
@@ -1144,6 +1147,21 @@
 	return 0;
 }
 
+static int is_dx_internal_node(struct inode *dir, ext4_lblk_t block,
+			       struct ext4_dir_entry *de)
+{
+	struct super_block *sb = dir->i_sb;
+
+	if (!is_dx(dir))
+		return 0;
+	if (block == 0)
+		return 1;
+	if (de->inode == 0 &&
+	    ext4_rec_len_from_disk(de->rec_len, sb->s_blocksize) ==
+			sb->s_blocksize)
+		return 1;
+	return 0;
+}
 
 /*
  *	ext4_find_entry()
@@ -1158,7 +1176,8 @@
  */
 static struct buffer_head * ext4_find_entry (struct inode *dir,
 					const struct qstr *d_name,
-					struct ext4_dir_entry_2 ** res_dir)
+					struct ext4_dir_entry_2 **res_dir,
+					int *inlined)
 {
 	struct super_block *sb;
 	struct buffer_head *bh_use[NAMEI_RA_SIZE];
@@ -1179,6 +1198,18 @@
 	namelen = d_name->len;
 	if (namelen > EXT4_NAME_LEN)
 		return NULL;
+
+	if (ext4_has_inline_data(dir)) {
+		int has_inline_data = 1;
+		ret = ext4_find_inline_entry(dir, d_name, res_dir,
+					     &has_inline_data);
+		if (has_inline_data) {
+			if (inlined)
+				*inlined = 1;
+			return ret;
+		}
+	}
+
 	if ((namelen <= 2) && (name[0] == '.') &&
 	    (name[1] == '.' || name[1] == '\0')) {
 		/*
@@ -1244,6 +1275,8 @@
 			goto next;
 		}
 		if (!buffer_verified(bh) &&
+		    !is_dx_internal_node(dir, block,
+					 (struct ext4_dir_entry *)bh->b_data) &&
 		    !ext4_dirent_csum_verify(dir,
 				(struct ext4_dir_entry *)bh->b_data)) {
 			EXT4_ERROR_INODE(dir, "checksumming directory "
@@ -1361,7 +1394,7 @@
 	if (dentry->d_name.len > EXT4_NAME_LEN)
 		return ERR_PTR(-ENAMETOOLONG);
 
-	bh = ext4_find_entry(dir, &dentry->d_name, &de);
+	bh = ext4_find_entry(dir, &dentry->d_name, &de, NULL);
 	inode = NULL;
 	if (bh) {
 		__u32 ino = le32_to_cpu(de->inode);
@@ -1395,7 +1428,7 @@
 	struct ext4_dir_entry_2 * de;
 	struct buffer_head *bh;
 
-	bh = ext4_find_entry(child->d_inode, &dotdot, &de);
+	bh = ext4_find_entry(child->d_inode, &dotdot, &de, NULL);
 	if (!bh)
 		return ERR_PTR(-ENOENT);
 	ino = le32_to_cpu(de->inode);
@@ -1593,6 +1626,63 @@
 	return NULL;
 }
 
+int ext4_find_dest_de(struct inode *dir, struct inode *inode,
+		      struct buffer_head *bh,
+		      void *buf, int buf_size,
+		      const char *name, int namelen,
+		      struct ext4_dir_entry_2 **dest_de)
+{
+	struct ext4_dir_entry_2 *de;
+	unsigned short reclen = EXT4_DIR_REC_LEN(namelen);
+	int nlen, rlen;
+	unsigned int offset = 0;
+	char *top;
+
+	de = (struct ext4_dir_entry_2 *)buf;
+	top = buf + buf_size - reclen;
+	while ((char *) de <= top) {
+		if (ext4_check_dir_entry(dir, NULL, de, bh,
+					 buf, buf_size, offset))
+			return -EIO;
+		if (ext4_match(namelen, name, de))
+			return -EEXIST;
+		nlen = EXT4_DIR_REC_LEN(de->name_len);
+		rlen = ext4_rec_len_from_disk(de->rec_len, buf_size);
+		if ((de->inode ? rlen - nlen : rlen) >= reclen)
+			break;
+		de = (struct ext4_dir_entry_2 *)((char *)de + rlen);
+		offset += rlen;
+	}
+	if ((char *) de > top)
+		return -ENOSPC;
+
+	*dest_de = de;
+	return 0;
+}
+
+void ext4_insert_dentry(struct inode *inode,
+			struct ext4_dir_entry_2 *de,
+			int buf_size,
+			const char *name, int namelen)
+{
+
+	int nlen, rlen;
+
+	nlen = EXT4_DIR_REC_LEN(de->name_len);
+	rlen = ext4_rec_len_from_disk(de->rec_len, buf_size);
+	if (de->inode) {
+		struct ext4_dir_entry_2 *de1 =
+				(struct ext4_dir_entry_2 *)((char *)de + nlen);
+		de1->rec_len = ext4_rec_len_to_disk(rlen - nlen, buf_size);
+		de->rec_len = ext4_rec_len_to_disk(nlen, buf_size);
+		de = de1;
+	}
+	de->file_type = EXT4_FT_UNKNOWN;
+	de->inode = cpu_to_le32(inode->i_ino);
+	ext4_set_de_type(inode->i_sb, de, inode->i_mode);
+	de->name_len = namelen;
+	memcpy(de->name, name, namelen);
+}
 /*
  * Add a new entry into a directory (leaf) block.  If de is non-NULL,
  * it points to a directory entry which is guaranteed to be large
@@ -1608,12 +1698,10 @@
 	struct inode	*dir = dentry->d_parent->d_inode;
 	const char	*name = dentry->d_name.name;
 	int		namelen = dentry->d_name.len;
-	unsigned int	offset = 0;
 	unsigned int	blocksize = dir->i_sb->s_blocksize;
 	unsigned short	reclen;
-	int		nlen, rlen, err;
-	char		*top;
 	int		csum_size = 0;
+	int		err;
 
 	if (EXT4_HAS_RO_COMPAT_FEATURE(inode->i_sb,
 				       EXT4_FEATURE_RO_COMPAT_METADATA_CSUM))
@@ -1621,22 +1709,11 @@
 
 	reclen = EXT4_DIR_REC_LEN(namelen);
 	if (!de) {
-		de = (struct ext4_dir_entry_2 *)bh->b_data;
-		top = bh->b_data + (blocksize - csum_size) - reclen;
-		while ((char *) de <= top) {
-			if (ext4_check_dir_entry(dir, NULL, de, bh, offset))
-				return -EIO;
-			if (ext4_match(namelen, name, de))
-				return -EEXIST;
-			nlen = EXT4_DIR_REC_LEN(de->name_len);
-			rlen = ext4_rec_len_from_disk(de->rec_len, blocksize);
-			if ((de->inode? rlen - nlen: rlen) >= reclen)
-				break;
-			de = (struct ext4_dir_entry_2 *)((char *)de + rlen);
-			offset += rlen;
-		}
-		if ((char *) de > top)
-			return -ENOSPC;
+		err = ext4_find_dest_de(dir, inode,
+					bh, bh->b_data, blocksize - csum_size,
+					name, namelen, &de);
+		if (err)
+			return err;
 	}
 	BUFFER_TRACE(bh, "get_write_access");
 	err = ext4_journal_get_write_access(handle, bh);
@@ -1646,19 +1723,8 @@
 	}
 
 	/* By now the buffer is marked for journaling */
-	nlen = EXT4_DIR_REC_LEN(de->name_len);
-	rlen = ext4_rec_len_from_disk(de->rec_len, blocksize);
-	if (de->inode) {
-		struct ext4_dir_entry_2 *de1 = (struct ext4_dir_entry_2 *)((char *)de + nlen);
-		de1->rec_len = ext4_rec_len_to_disk(rlen - nlen, blocksize);
-		de->rec_len = ext4_rec_len_to_disk(nlen, blocksize);
-		de = de1;
-	}
-	de->file_type = EXT4_FT_UNKNOWN;
-	de->inode = cpu_to_le32(inode->i_ino);
-	ext4_set_de_type(dir->i_sb, de, inode->i_mode);
-	de->name_len = namelen;
-	memcpy(de->name, name, namelen);
+	ext4_insert_dentry(inode, de, blocksize, name, namelen);
+
 	/*
 	 * XXX shouldn't update any times until successful
 	 * completion of syscall, but too many callers depend
@@ -1831,6 +1897,17 @@
 	blocksize = sb->s_blocksize;
 	if (!dentry->d_name.len)
 		return -EINVAL;
+
+	if (ext4_has_inline_data(dir)) {
+		retval = ext4_try_add_inline_entry(handle, dentry, inode);
+		if (retval < 0)
+			return retval;
+		if (retval == 1) {
+			retval = 0;
+			return retval;
+		}
+	}
+
 	if (is_dx(dir)) {
 		retval = ext4_dx_add_entry(handle, dentry, inode);
 		if (!retval || (retval != ERR_BAD_DX_DIR))
@@ -2036,36 +2113,29 @@
 }
 
 /*
- * ext4_delete_entry deletes a directory entry by merging it with the
- * previous entry
+ * ext4_generic_delete_entry deletes a directory entry by merging it
+ * with the previous entry
  */
-static int ext4_delete_entry(handle_t *handle,
-			     struct inode *dir,
-			     struct ext4_dir_entry_2 *de_del,
-			     struct buffer_head *bh)
+int ext4_generic_delete_entry(handle_t *handle,
+			      struct inode *dir,
+			      struct ext4_dir_entry_2 *de_del,
+			      struct buffer_head *bh,
+			      void *entry_buf,
+			      int buf_size,
+			      int csum_size)
 {
 	struct ext4_dir_entry_2 *de, *pde;
 	unsigned int blocksize = dir->i_sb->s_blocksize;
-	int csum_size = 0;
-	int i, err;
-
-	if (EXT4_HAS_RO_COMPAT_FEATURE(dir->i_sb,
-				       EXT4_FEATURE_RO_COMPAT_METADATA_CSUM))
-		csum_size = sizeof(struct ext4_dir_entry_tail);
+	int i;
 
 	i = 0;
 	pde = NULL;
-	de = (struct ext4_dir_entry_2 *) bh->b_data;
-	while (i < bh->b_size - csum_size) {
-		if (ext4_check_dir_entry(dir, NULL, de, bh, i))
+	de = (struct ext4_dir_entry_2 *)entry_buf;
+	while (i < buf_size - csum_size) {
+		if (ext4_check_dir_entry(dir, NULL, de, bh,
+					 bh->b_data, bh->b_size, i))
 			return -EIO;
 		if (de == de_del)  {
-			BUFFER_TRACE(bh, "get_write_access");
-			err = ext4_journal_get_write_access(handle, bh);
-			if (unlikely(err)) {
-				ext4_std_error(dir->i_sb, err);
-				return err;
-			}
 			if (pde)
 				pde->rec_len = ext4_rec_len_to_disk(
 					ext4_rec_len_from_disk(pde->rec_len,
@@ -2076,12 +2146,6 @@
 			else
 				de->inode = 0;
 			dir->i_version++;
-			BUFFER_TRACE(bh, "call ext4_handle_dirty_metadata");
-			err = ext4_handle_dirty_dirent_node(handle, dir, bh);
-			if (unlikely(err)) {
-				ext4_std_error(dir->i_sb, err);
-				return err;
-			}
 			return 0;
 		}
 		i += ext4_rec_len_from_disk(de->rec_len, blocksize);
@@ -2091,6 +2155,48 @@
 	return -ENOENT;
 }
 
+static int ext4_delete_entry(handle_t *handle,
+			     struct inode *dir,
+			     struct ext4_dir_entry_2 *de_del,
+			     struct buffer_head *bh)
+{
+	int err, csum_size = 0;
+
+	if (ext4_has_inline_data(dir)) {
+		int has_inline_data = 1;
+		err = ext4_delete_inline_entry(handle, dir, de_del, bh,
+					       &has_inline_data);
+		if (has_inline_data)
+			return err;
+	}
+
+	if (EXT4_HAS_RO_COMPAT_FEATURE(dir->i_sb,
+				       EXT4_FEATURE_RO_COMPAT_METADATA_CSUM))
+		csum_size = sizeof(struct ext4_dir_entry_tail);
+
+	BUFFER_TRACE(bh, "get_write_access");
+	err = ext4_journal_get_write_access(handle, bh);
+	if (unlikely(err))
+		goto out;
+
+	err = ext4_generic_delete_entry(handle, dir, de_del,
+					bh, bh->b_data,
+					dir->i_sb->s_blocksize, csum_size);
+	if (err)
+		goto out;
+
+	BUFFER_TRACE(bh, "call ext4_handle_dirty_metadata");
+	err = ext4_handle_dirty_dirent_node(handle, dir, bh);
+	if (unlikely(err))
+		goto out;
+
+	return 0;
+out:
+	if (err != -ENOENT)
+		ext4_std_error(dir->i_sb, err);
+	return err;
+}
+
 /*
  * DIR_NLINK feature is set if 1) nlinks > EXT4_LINK_MAX or 2) nlinks == 2,
  * since this indicates that nlinks count was previously 1.
@@ -2211,21 +2317,95 @@
 	return err;
 }
 
-static int ext4_mkdir(struct inode *dir, struct dentry *dentry, umode_t mode)
+struct ext4_dir_entry_2 *ext4_init_dot_dotdot(struct inode *inode,
+			  struct ext4_dir_entry_2 *de,
+			  int blocksize, int csum_size,
+			  unsigned int parent_ino, int dotdot_real_len)
 {
-	handle_t *handle;
-	struct inode *inode;
+	de->inode = cpu_to_le32(inode->i_ino);
+	de->name_len = 1;
+	de->rec_len = ext4_rec_len_to_disk(EXT4_DIR_REC_LEN(de->name_len),
+					   blocksize);
+	strcpy(de->name, ".");
+	ext4_set_de_type(inode->i_sb, de, S_IFDIR);
+
+	de = ext4_next_entry(de, blocksize);
+	de->inode = cpu_to_le32(parent_ino);
+	de->name_len = 2;
+	if (!dotdot_real_len)
+		de->rec_len = ext4_rec_len_to_disk(blocksize -
+					(csum_size + EXT4_DIR_REC_LEN(1)),
+					blocksize);
+	else
+		de->rec_len = ext4_rec_len_to_disk(
+				EXT4_DIR_REC_LEN(de->name_len), blocksize);
+	strcpy(de->name, "..");
+	ext4_set_de_type(inode->i_sb, de, S_IFDIR);
+
+	return ext4_next_entry(de, blocksize);
+}
+
+static int ext4_init_new_dir(handle_t *handle, struct inode *dir,
+			     struct inode *inode)
+{
 	struct buffer_head *dir_block = NULL;
 	struct ext4_dir_entry_2 *de;
 	struct ext4_dir_entry_tail *t;
 	unsigned int blocksize = dir->i_sb->s_blocksize;
 	int csum_size = 0;
-	int err, retries = 0;
+	int err;
 
 	if (EXT4_HAS_RO_COMPAT_FEATURE(dir->i_sb,
 				       EXT4_FEATURE_RO_COMPAT_METADATA_CSUM))
 		csum_size = sizeof(struct ext4_dir_entry_tail);
 
+	if (ext4_test_inode_state(inode, EXT4_STATE_MAY_INLINE_DATA)) {
+		err = ext4_try_create_inline_dir(handle, dir, inode);
+		if (err < 0 && err != -ENOSPC)
+			goto out;
+		if (!err)
+			goto out;
+	}
+
+	inode->i_size = EXT4_I(inode)->i_disksize = blocksize;
+	dir_block = ext4_bread(handle, inode, 0, 1, &err);
+	if (!(dir_block = ext4_bread(handle, inode, 0, 1, &err))) {
+		if (!err) {
+			err = -EIO;
+			ext4_error(inode->i_sb,
+				   "Directory hole detected on inode %lu\n",
+				   inode->i_ino);
+		}
+		goto out;
+	}
+	BUFFER_TRACE(dir_block, "get_write_access");
+	err = ext4_journal_get_write_access(handle, dir_block);
+	if (err)
+		goto out;
+	de = (struct ext4_dir_entry_2 *)dir_block->b_data;
+	ext4_init_dot_dotdot(inode, de, blocksize, csum_size, dir->i_ino, 0);
+	set_nlink(inode, 2);
+	if (csum_size) {
+		t = EXT4_DIRENT_TAIL(dir_block->b_data, blocksize);
+		initialize_dirent_tail(t, blocksize);
+	}
+
+	BUFFER_TRACE(dir_block, "call ext4_handle_dirty_metadata");
+	err = ext4_handle_dirty_dirent_node(handle, inode, dir_block);
+	if (err)
+		goto out;
+	set_buffer_verified(dir_block);
+out:
+	brelse(dir_block);
+	return err;
+}
+
+static int ext4_mkdir(struct inode *dir, struct dentry *dentry, umode_t mode)
+{
+	handle_t *handle;
+	struct inode *inode;
+	int err, retries = 0;
+
 	if (EXT4_DIR_LINK_MAX(dir))
 		return -EMLINK;
 
@@ -2249,47 +2429,9 @@
 
 	inode->i_op = &ext4_dir_inode_operations;
 	inode->i_fop = &ext4_dir_operations;
-	inode->i_size = EXT4_I(inode)->i_disksize = inode->i_sb->s_blocksize;
-	if (!(dir_block = ext4_bread(handle, inode, 0, 1, &err))) {
-		if (!err) {
-			err = -EIO;
-			ext4_error(inode->i_sb,
-				   "Directory hole detected on inode %lu\n",
-				   inode->i_ino);
-		}
-		goto out_clear_inode;
-	}
-	BUFFER_TRACE(dir_block, "get_write_access");
-	err = ext4_journal_get_write_access(handle, dir_block);
+	err = ext4_init_new_dir(handle, dir, inode);
 	if (err)
 		goto out_clear_inode;
-	de = (struct ext4_dir_entry_2 *) dir_block->b_data;
-	de->inode = cpu_to_le32(inode->i_ino);
-	de->name_len = 1;
-	de->rec_len = ext4_rec_len_to_disk(EXT4_DIR_REC_LEN(de->name_len),
-					   blocksize);
-	strcpy(de->name, ".");
-	ext4_set_de_type(dir->i_sb, de, S_IFDIR);
-	de = ext4_next_entry(de, blocksize);
-	de->inode = cpu_to_le32(dir->i_ino);
-	de->rec_len = ext4_rec_len_to_disk(blocksize -
-					   (csum_size + EXT4_DIR_REC_LEN(1)),
-					   blocksize);
-	de->name_len = 2;
-	strcpy(de->name, "..");
-	ext4_set_de_type(dir->i_sb, de, S_IFDIR);
-	set_nlink(inode, 2);
-
-	if (csum_size) {
-		t = EXT4_DIRENT_TAIL(dir_block->b_data, blocksize);
-		initialize_dirent_tail(t, blocksize);
-	}
-
-	BUFFER_TRACE(dir_block, "call ext4_handle_dirty_metadata");
-	err = ext4_handle_dirty_dirent_node(handle, inode, dir_block);
-	if (err)
-		goto out_clear_inode;
-	set_buffer_verified(dir_block);
 	err = ext4_mark_inode_dirty(handle, inode);
 	if (!err)
 		err = ext4_add_entry(handle, dentry, inode);
@@ -2309,7 +2451,6 @@
 	unlock_new_inode(inode);
 	d_instantiate(dentry, inode);
 out_stop:
-	brelse(dir_block);
 	ext4_journal_stop(handle);
 	if (err == -ENOSPC && ext4_should_retry_alloc(dir->i_sb, &retries))
 		goto retry;
@@ -2327,6 +2468,14 @@
 	struct super_block *sb;
 	int err = 0;
 
+	if (ext4_has_inline_data(inode)) {
+		int has_inline_data = 1;
+
+		err = empty_inline_dir(inode, &has_inline_data);
+		if (has_inline_data)
+			return err;
+	}
+
 	sb = inode->i_sb;
 	if (inode->i_size < EXT4_DIR_REC_LEN(1) + EXT4_DIR_REC_LEN(2) ||
 	    !(bh = ext4_bread(NULL, inode, 0, 0, &err))) {
@@ -2393,7 +2542,8 @@
 			set_buffer_verified(bh);
 			de = (struct ext4_dir_entry_2 *) bh->b_data;
 		}
-		if (ext4_check_dir_entry(inode, NULL, de, bh, offset)) {
+		if (ext4_check_dir_entry(inode, NULL, de, bh,
+					 bh->b_data, bh->b_size, offset)) {
 			de = (struct ext4_dir_entry_2 *)(bh->b_data +
 							 sb->s_blocksize);
 			offset = (offset | (sb->s_blocksize - 1)) + 1;
@@ -2579,7 +2729,7 @@
 		return PTR_ERR(handle);
 
 	retval = -ENOENT;
-	bh = ext4_find_entry(dir, &dentry->d_name, &de);
+	bh = ext4_find_entry(dir, &dentry->d_name, &de, NULL);
 	if (!bh)
 		goto end_rmdir;
 
@@ -2644,7 +2794,7 @@
 		ext4_handle_sync(handle);
 
 	retval = -ENOENT;
-	bh = ext4_find_entry(dir, &dentry->d_name, &de);
+	bh = ext4_find_entry(dir, &dentry->d_name, &de, NULL);
 	if (!bh)
 		goto end_unlink;
 
@@ -2826,8 +2976,39 @@
 	return err;
 }
 
-#define PARENT_INO(buffer, size) \
-	(ext4_next_entry((struct ext4_dir_entry_2 *)(buffer), size)->inode)
+
+/*
+ * Try to find buffer head where contains the parent block.
+ * It should be the inode block if it is inlined or the 1st block
+ * if it is a normal dir.
+ */
+static struct buffer_head *ext4_get_first_dir_block(handle_t *handle,
+					struct inode *inode,
+					int *retval,
+					struct ext4_dir_entry_2 **parent_de,
+					int *inlined)
+{
+	struct buffer_head *bh;
+
+	if (!ext4_has_inline_data(inode)) {
+		if (!(bh = ext4_bread(handle, inode, 0, 0, retval))) {
+			if (!*retval) {
+				*retval = -EIO;
+				ext4_error(inode->i_sb,
+					   "Directory hole detected on inode %lu\n",
+					   inode->i_ino);
+			}
+			return NULL;
+		}
+		*parent_de = ext4_next_entry(
+					(struct ext4_dir_entry_2 *)bh->b_data,
+					inode->i_sb->s_blocksize);
+		return bh;
+	}
+
+	*inlined = 1;
+	return ext4_get_first_inline_block(inode, parent_de, retval);
+}
 
 /*
  * Anybody can rename anything with this: the permission checks are left to the
@@ -2841,6 +3022,8 @@
 	struct buffer_head *old_bh, *new_bh, *dir_bh;
 	struct ext4_dir_entry_2 *old_de, *new_de;
 	int retval, force_da_alloc = 0;
+	int inlined = 0, new_inlined = 0;
+	struct ext4_dir_entry_2 *parent_de;
 
 	dquot_initialize(old_dir);
 	dquot_initialize(new_dir);
@@ -2860,7 +3043,7 @@
 	if (IS_DIRSYNC(old_dir) || IS_DIRSYNC(new_dir))
 		ext4_handle_sync(handle);
 
-	old_bh = ext4_find_entry(old_dir, &old_dentry->d_name, &old_de);
+	old_bh = ext4_find_entry(old_dir, &old_dentry->d_name, &old_de, NULL);
 	/*
 	 *  Check for inode number is _not_ due to possible IO errors.
 	 *  We might rmdir the source, keep it as pwd of some process
@@ -2873,7 +3056,8 @@
 		goto end_rename;
 
 	new_inode = new_dentry->d_inode;
-	new_bh = ext4_find_entry(new_dir, &new_dentry->d_name, &new_de);
+	new_bh = ext4_find_entry(new_dir, &new_dentry->d_name,
+				 &new_de, &new_inlined);
 	if (new_bh) {
 		if (!new_inode) {
 			brelse(new_bh);
@@ -2887,22 +3071,17 @@
 				goto end_rename;
 		}
 		retval = -EIO;
-		if (!(dir_bh = ext4_bread(handle, old_inode, 0, 0, &retval))) {
-			if (!retval) {
-				retval = -EIO;
-				ext4_error(old_inode->i_sb,
-					   "Directory hole detected on inode %lu\n",
-					   old_inode->i_ino);
-			}
+		dir_bh = ext4_get_first_dir_block(handle, old_inode,
+						  &retval, &parent_de,
+						  &inlined);
+		if (!dir_bh)
 			goto end_rename;
-		}
-		if (!buffer_verified(dir_bh) &&
+		if (!inlined && !buffer_verified(dir_bh) &&
 		    !ext4_dirent_csum_verify(old_inode,
 				(struct ext4_dir_entry *)dir_bh->b_data))
 			goto end_rename;
 		set_buffer_verified(dir_bh);
-		if (le32_to_cpu(PARENT_INO(dir_bh->b_data,
-				old_dir->i_sb->s_blocksize)) != old_dir->i_ino)
+		if (le32_to_cpu(parent_de->inode) != old_dir->i_ino)
 			goto end_rename;
 		retval = -EMLINK;
 		if (!new_inode && new_dir != old_dir &&
@@ -2931,10 +3110,13 @@
 					ext4_current_time(new_dir);
 		ext4_mark_inode_dirty(handle, new_dir);
 		BUFFER_TRACE(new_bh, "call ext4_handle_dirty_metadata");
-		retval = ext4_handle_dirty_dirent_node(handle, new_dir, new_bh);
-		if (unlikely(retval)) {
-			ext4_std_error(new_dir->i_sb, retval);
-			goto end_rename;
+		if (!new_inlined) {
+			retval = ext4_handle_dirty_dirent_node(handle,
+							       new_dir, new_bh);
+			if (unlikely(retval)) {
+				ext4_std_error(new_dir->i_sb, retval);
+				goto end_rename;
+			}
 		}
 		brelse(new_bh);
 		new_bh = NULL;
@@ -2962,7 +3144,8 @@
 		struct buffer_head *old_bh2;
 		struct ext4_dir_entry_2 *old_de2;
 
-		old_bh2 = ext4_find_entry(old_dir, &old_dentry->d_name, &old_de2);
+		old_bh2 = ext4_find_entry(old_dir, &old_dentry->d_name,
+					  &old_de2, NULL);
 		if (old_bh2) {
 			retval = ext4_delete_entry(handle, old_dir,
 						   old_de2, old_bh2);
@@ -2982,17 +3165,19 @@
 	old_dir->i_ctime = old_dir->i_mtime = ext4_current_time(old_dir);
 	ext4_update_dx_flag(old_dir);
 	if (dir_bh) {
-		PARENT_INO(dir_bh->b_data, new_dir->i_sb->s_blocksize) =
-						cpu_to_le32(new_dir->i_ino);
+		parent_de->inode = cpu_to_le32(new_dir->i_ino);
 		BUFFER_TRACE(dir_bh, "call ext4_handle_dirty_metadata");
-		if (is_dx(old_inode)) {
-			retval = ext4_handle_dirty_dx_node(handle,
-							   old_inode,
-							   dir_bh);
+		if (!inlined) {
+			if (is_dx(old_inode)) {
+				retval = ext4_handle_dirty_dx_node(handle,
+								   old_inode,
+								   dir_bh);
+			} else {
+				retval = ext4_handle_dirty_dirent_node(handle,
+							old_inode, dir_bh);
+			}
 		} else {
-			retval = ext4_handle_dirty_dirent_node(handle,
-							       old_inode,
-							       dir_bh);
+			retval = ext4_mark_inode_dirty(handle, old_inode);
 		}
 		if (retval) {
 			ext4_std_error(old_dir->i_sb, retval);
@@ -3043,23 +3228,19 @@
 	.mknod		= ext4_mknod,
 	.rename		= ext4_rename,
 	.setattr	= ext4_setattr,
-#ifdef CONFIG_EXT4_FS_XATTR
 	.setxattr	= generic_setxattr,
 	.getxattr	= generic_getxattr,
 	.listxattr	= ext4_listxattr,
 	.removexattr	= generic_removexattr,
-#endif
 	.get_acl	= ext4_get_acl,
 	.fiemap         = ext4_fiemap,
 };
 
 const struct inode_operations ext4_special_inode_operations = {
 	.setattr	= ext4_setattr,
-#ifdef CONFIG_EXT4_FS_XATTR
 	.setxattr	= generic_setxattr,
 	.getxattr	= generic_getxattr,
 	.listxattr	= ext4_listxattr,
 	.removexattr	= generic_removexattr,
-#endif
 	.get_acl	= ext4_get_acl,
 };
diff --git a/fs/ext4/page-io.c b/fs/ext4/page-io.c
index 68e896e..0016fbc 100644
--- a/fs/ext4/page-io.c
+++ b/fs/ext4/page-io.c
@@ -27,7 +27,6 @@
 #include "ext4_jbd2.h"
 #include "xattr.h"
 #include "acl.h"
-#include "ext4_extents.h"
 
 static struct kmem_cache *io_page_cachep, *io_end_cachep;
 
@@ -111,7 +110,7 @@
 		inode_dio_done(inode);
 	/* Wake up anyone waiting on unwritten extent conversion */
 	if (atomic_dec_and_test(&EXT4_I(inode)->i_unwritten))
-		wake_up_all(ext4_ioend_wq(io->inode));
+		wake_up_all(ext4_ioend_wq(inode));
 	return ret;
 }
 
diff --git a/fs/ext4/resize.c b/fs/ext4/resize.c
index 47bf06a..d99387b 100644
--- a/fs/ext4/resize.c
+++ b/fs/ext4/resize.c
@@ -783,7 +783,7 @@
 
 	err = ext4_journal_get_write_access(handle, gdb_bh);
 	if (unlikely(err))
-		goto exit_sbh;
+		goto exit_dind;
 
 	err = ext4_journal_get_write_access(handle, dind);
 	if (unlikely(err))
@@ -792,7 +792,7 @@
 	/* ext4_reserve_inode_write() gets a reference on the iloc */
 	err = ext4_reserve_inode_write(handle, inode, &iloc);
 	if (unlikely(err))
-		goto exit_dindj;
+		goto exit_dind;
 
 	n_group_desc = ext4_kvmalloc((gdb_num + 1) *
 				     sizeof(struct buffer_head *),
@@ -846,12 +846,7 @@
 
 exit_inode:
 	ext4_kvfree(n_group_desc);
-	/* ext4_handle_release_buffer(handle, iloc.bh); */
 	brelse(iloc.bh);
-exit_dindj:
-	/* ext4_handle_release_buffer(handle, dind); */
-exit_sbh:
-	/* ext4_handle_release_buffer(handle, EXT4_SB(sb)->s_sbh); */
 exit_dind:
 	brelse(dind);
 exit_bh:
@@ -969,14 +964,8 @@
 	}
 
 	for (i = 0; i < reserved_gdb; i++) {
-		if ((err = ext4_journal_get_write_access(handle, primary[i]))) {
-			/*
-			int j;
-			for (j = 0; j < i; j++)
-				ext4_handle_release_buffer(handle, primary[j]);
-			 */
+		if ((err = ext4_journal_get_write_access(handle, primary[i])))
 			goto exit_bh;
-		}
 	}
 
 	if ((err = ext4_reserve_inode_write(handle, inode, &iloc)))
diff --git a/fs/ext4/super.c b/fs/ext4/super.c
index 80928f7..3cdb0a2 100644
--- a/fs/ext4/super.c
+++ b/fs/ext4/super.c
@@ -45,7 +45,7 @@
 #include <linux/freezer.h>
 
 #include "ext4.h"
-#include "ext4_extents.h"
+#include "ext4_extents.h"	/* Needed for trace points definition */
 #include "ext4_jbd2.h"
 #include "xattr.h"
 #include "acl.h"
@@ -939,10 +939,11 @@
 		return NULL;
 
 	ei->vfs_inode.i_version = 1;
-	ei->vfs_inode.i_data.writeback_index = 0;
 	memset(&ei->i_cached_extent, 0, sizeof(struct ext4_ext_cache));
 	INIT_LIST_HEAD(&ei->i_prealloc_list);
 	spin_lock_init(&ei->i_prealloc_lock);
+	ext4_es_init_tree(&ei->i_es_tree);
+	rwlock_init(&ei->i_es_lock);
 	ei->i_reserved_data_blocks = 0;
 	ei->i_reserved_meta_blocks = 0;
 	ei->i_allocated_meta_blocks = 0;
@@ -996,9 +997,7 @@
 	struct ext4_inode_info *ei = (struct ext4_inode_info *) foo;
 
 	INIT_LIST_HEAD(&ei->i_orphan);
-#ifdef CONFIG_EXT4_FS_XATTR
 	init_rwsem(&ei->xattr_sem);
-#endif
 	init_rwsem(&ei->i_data_sem);
 	inode_init_once(&ei->vfs_inode);
 }
@@ -1031,6 +1030,7 @@
 	clear_inode(inode);
 	dquot_drop(inode);
 	ext4_discard_preallocations(inode);
+	ext4_es_remove_extent(inode, 0, EXT_MAX_BLOCKS);
 	if (EXT4_I(inode)->jinode) {
 		jbd2_journal_release_jbd_inode(EXT4_JOURNAL(inode),
 					       EXT4_I(inode)->jinode);
@@ -1447,13 +1447,8 @@
 	{Opt_data_journal, EXT4_MOUNT_JOURNAL_DATA, MOPT_DATAJ},
 	{Opt_data_ordered, EXT4_MOUNT_ORDERED_DATA, MOPT_DATAJ},
 	{Opt_data_writeback, EXT4_MOUNT_WRITEBACK_DATA, MOPT_DATAJ},
-#ifdef CONFIG_EXT4_FS_XATTR
 	{Opt_user_xattr, EXT4_MOUNT_XATTR_USER, MOPT_SET},
 	{Opt_nouser_xattr, EXT4_MOUNT_XATTR_USER, MOPT_CLEAR},
-#else
-	{Opt_user_xattr, 0, MOPT_NOSUPPORT},
-	{Opt_nouser_xattr, 0, MOPT_NOSUPPORT},
-#endif
 #ifdef CONFIG_EXT4_FS_POSIX_ACL
 	{Opt_acl, EXT4_MOUNT_POSIX_ACL, MOPT_SET},
 	{Opt_noacl, EXT4_MOUNT_POSIX_ACL, MOPT_CLEAR},
@@ -3202,7 +3197,6 @@
 	ext4_fsblk_t overhead = 0;
 	char *buf = (char *) get_zeroed_page(GFP_KERNEL);
 
-	memset(buf, 0, PAGE_SIZE);
 	if (!buf)
 		return -ENOMEM;
 
@@ -3256,7 +3250,7 @@
 	unsigned int i;
 	int needs_recovery, has_huge_files, has_bigalloc;
 	__u64 blocks_count;
-	int err;
+	int err = 0;
 	unsigned int journal_ioprio = DEFAULT_JOURNAL_IOPRIO;
 	ext4_group_t first_not_zeroed;
 
@@ -3272,9 +3266,6 @@
 	}
 	sb->s_fs_info = sbi;
 	sbi->s_sb = sb;
-	sbi->s_mount_opt = 0;
-	sbi->s_resuid = make_kuid(&init_user_ns, EXT4_DEF_RESUID);
-	sbi->s_resgid = make_kgid(&init_user_ns, EXT4_DEF_RESGID);
 	sbi->s_inode_readahead_blks = EXT4_DEF_INODE_READAHEAD_BLKS;
 	sbi->s_sb_block = sb_block;
 	if (sb->s_bdev->bd_part)
@@ -3285,6 +3276,7 @@
 	for (cp = sb->s_id; (cp = strchr(cp, '/'));)
 		*cp = '!';
 
+	/* -EINVAL is default */
 	ret = -EINVAL;
 	blocksize = sb_min_blocksize(sb, EXT4_MIN_BLOCK_SIZE);
 	if (!blocksize) {
@@ -3369,9 +3361,7 @@
 	if (def_mount_opts & EXT4_DEFM_UID16)
 		set_opt(sb, NO_UID32);
 	/* xattr user namespace & acls are now defaulted on */
-#ifdef CONFIG_EXT4_FS_XATTR
 	set_opt(sb, XATTR_USER);
-#endif
 #ifdef CONFIG_EXT4_FS_POSIX_ACL
 	set_opt(sb, POSIX_ACL);
 #endif
@@ -3662,7 +3652,6 @@
 			 " too large to mount safely on this system");
 		if (sizeof(sector_t) < 8)
 			ext4_msg(sb, KERN_WARNING, "CONFIG_LBDAF not enabled");
-		ret = err;
 		goto failed_mount;
 	}
 
@@ -3770,7 +3759,6 @@
 	}
 	if (err) {
 		ext4_msg(sb, KERN_ERR, "insufficient memory");
-		ret = err;
 		goto failed_mount3;
 	}
 
@@ -3801,7 +3789,6 @@
 
 	INIT_LIST_HEAD(&sbi->s_orphan); /* unlinked but open files */
 	mutex_init(&sbi->s_orphan_lock);
-	sbi->s_resize_flags = 0;
 
 	sb->s_root = NULL;
 
@@ -3897,8 +3884,8 @@
 	if (es->s_overhead_clusters)
 		sbi->s_overhead = le32_to_cpu(es->s_overhead_clusters);
 	else {
-		ret = ext4_calculate_overhead(sb);
-		if (ret)
+		err = ext4_calculate_overhead(sb);
+		if (err)
 			goto failed_mount_wq;
 	}
 
@@ -3910,6 +3897,7 @@
 		alloc_workqueue("ext4-dio-unwritten", WQ_MEM_RECLAIM | WQ_UNBOUND, 1);
 	if (!EXT4_SB(sb)->dio_unwritten_wq) {
 		printk(KERN_ERR "EXT4-fs: failed to create DIO workqueue\n");
+		ret = -ENOMEM;
 		goto failed_mount_wq;
 	}
 
@@ -4012,12 +4000,20 @@
 	/* Enable quota usage during mount. */
 	if (EXT4_HAS_RO_COMPAT_FEATURE(sb, EXT4_FEATURE_RO_COMPAT_QUOTA) &&
 	    !(sb->s_flags & MS_RDONLY)) {
-		ret = ext4_enable_quotas(sb);
-		if (ret)
+		err = ext4_enable_quotas(sb);
+		if (err)
 			goto failed_mount7;
 	}
 #endif  /* CONFIG_QUOTA */
 
+	if (test_opt(sb, DISCARD)) {
+		struct request_queue *q = bdev_get_queue(sb->s_bdev);
+		if (!blk_queue_discard(q))
+			ext4_msg(sb, KERN_WARNING,
+				 "mounting with \"discard\" option, but "
+				 "the device does not support discard");
+	}
+
 	ext4_msg(sb, KERN_INFO, "mounted filesystem with%s. "
 		 "Opts: %s%s%s", descr, sbi->s_es->s_mount_opts,
 		 *sbi->s_es->s_mount_opts ? "; " : "", orig_data);
@@ -4084,7 +4080,7 @@
 	kfree(sbi);
 out_free_orig:
 	kfree(orig_data);
-	return ret;
+	return err ? err : ret;
 }
 
 /*
@@ -4790,7 +4786,7 @@
 
 	buf->f_type = EXT4_SUPER_MAGIC;
 	buf->f_bsize = sb->s_blocksize;
-	buf->f_blocks = ext4_blocks_count(es) - EXT4_C2B(sbi, sbi->s_overhead);
+	buf->f_blocks = ext4_blocks_count(es) - EXT4_C2B(sbi, overhead);
 	bfree = percpu_counter_sum_positive(&sbi->s_freeclusters_counter) -
 		percpu_counter_sum_positive(&sbi->s_dirtyclusters_counter);
 	/* prevent underflow in case that few free space is available */
@@ -5282,6 +5278,7 @@
 	ext4_li_info = NULL;
 	mutex_init(&ext4_li_mtx);
 
+	/* Build-time check for flags consistency */
 	ext4_check_flag_values();
 
 	for (i = 0; i < EXT4_WQ_HASH_SZ; i++) {
@@ -5289,9 +5286,14 @@
 		init_waitqueue_head(&ext4__ioend_wq[i]);
 	}
 
-	err = ext4_init_pageio();
+	err = ext4_init_es();
 	if (err)
 		return err;
+
+	err = ext4_init_pageio();
+	if (err)
+		goto out7;
+
 	err = ext4_init_system_zone();
 	if (err)
 		goto out6;
@@ -5341,6 +5343,9 @@
 	ext4_exit_system_zone();
 out6:
 	ext4_exit_pageio();
+out7:
+	ext4_exit_es();
+
 	return err;
 }
 
diff --git a/fs/ext4/symlink.c b/fs/ext4/symlink.c
index ed9354a..ff37119 100644
--- a/fs/ext4/symlink.c
+++ b/fs/ext4/symlink.c
@@ -35,22 +35,18 @@
 	.follow_link	= page_follow_link_light,
 	.put_link	= page_put_link,
 	.setattr	= ext4_setattr,
-#ifdef CONFIG_EXT4_FS_XATTR
 	.setxattr	= generic_setxattr,
 	.getxattr	= generic_getxattr,
 	.listxattr	= ext4_listxattr,
 	.removexattr	= generic_removexattr,
-#endif
 };
 
 const struct inode_operations ext4_fast_symlink_inode_operations = {
 	.readlink	= generic_readlink,
 	.follow_link	= ext4_follow_link,
 	.setattr	= ext4_setattr,
-#ifdef CONFIG_EXT4_FS_XATTR
 	.setxattr	= generic_setxattr,
 	.getxattr	= generic_getxattr,
 	.listxattr	= ext4_listxattr,
 	.removexattr	= generic_removexattr,
-#endif
 };
diff --git a/fs/ext4/xattr.c b/fs/ext4/xattr.c
index 2cdb98d..3a91ebc 100644
--- a/fs/ext4/xattr.c
+++ b/fs/ext4/xattr.c
@@ -61,11 +61,6 @@
 #include "xattr.h"
 #include "acl.h"
 
-#define BHDR(bh) ((struct ext4_xattr_header *)((bh)->b_data))
-#define ENTRY(ptr) ((struct ext4_xattr_entry *)(ptr))
-#define BFIRST(bh) ENTRY(BHDR(bh)+1)
-#define IS_LAST_ENTRY(entry) (*(__u32 *)(entry) == 0)
-
 #ifdef EXT4_XATTR_DEBUG
 # define ea_idebug(inode, f...) do { \
 		printk(KERN_DEBUG "inode %s:%lu: ", \
@@ -312,7 +307,7 @@
 	return error;
 }
 
-static int
+int
 ext4_xattr_ibody_get(struct inode *inode, int name_index, const char *name,
 		     void *buffer, size_t buffer_size)
 {
@@ -581,21 +576,6 @@
 	return (*min_offs - ((void *)last - base) - sizeof(__u32));
 }
 
-struct ext4_xattr_info {
-	int name_index;
-	const char *name;
-	const void *value;
-	size_t value_len;
-};
-
-struct ext4_xattr_search {
-	struct ext4_xattr_entry *first;
-	void *base;
-	void *end;
-	struct ext4_xattr_entry *here;
-	int not_found;
-};
-
 static int
 ext4_xattr_set_entry(struct ext4_xattr_info *i, struct ext4_xattr_search *s)
 {
@@ -648,9 +628,14 @@
 				   size. Just replace. */
 				s->here->e_value_size =
 					cpu_to_le32(i->value_len);
-				memset(val + size - EXT4_XATTR_PAD, 0,
-				       EXT4_XATTR_PAD); /* Clear pad bytes. */
-				memcpy(val, i->value, i->value_len);
+				if (i->value == EXT4_ZERO_XATTR_VALUE) {
+					memset(val, 0, size);
+				} else {
+					/* Clear pad bytes first. */
+					memset(val + size - EXT4_XATTR_PAD, 0,
+					       EXT4_XATTR_PAD);
+					memcpy(val, i->value, i->value_len);
+				}
 				return 0;
 			}
 
@@ -689,9 +674,14 @@
 			size_t size = EXT4_XATTR_SIZE(i->value_len);
 			void *val = s->base + min_offs - size;
 			s->here->e_value_offs = cpu_to_le16(min_offs - size);
-			memset(val + size - EXT4_XATTR_PAD, 0,
-			       EXT4_XATTR_PAD); /* Clear the pad bytes. */
-			memcpy(val, i->value, i->value_len);
+			if (i->value == EXT4_ZERO_XATTR_VALUE) {
+				memset(val, 0, size);
+			} else {
+				/* Clear the pad bytes first. */
+				memset(val + size - EXT4_XATTR_PAD, 0,
+				       EXT4_XATTR_PAD);
+				memcpy(val, i->value, i->value_len);
+			}
 		}
 	}
 	return 0;
@@ -794,7 +784,6 @@
 			int offset = (char *)s->here - bs->bh->b_data;
 
 			unlock_buffer(bs->bh);
-			ext4_handle_release_buffer(handle, bs->bh);
 			if (ce) {
 				mb_cache_entry_release(ce);
 				ce = NULL;
@@ -950,14 +939,8 @@
 #undef header
 }
 
-struct ext4_xattr_ibody_find {
-	struct ext4_xattr_search s;
-	struct ext4_iloc iloc;
-};
-
-static int
-ext4_xattr_ibody_find(struct inode *inode, struct ext4_xattr_info *i,
-		      struct ext4_xattr_ibody_find *is)
+int ext4_xattr_ibody_find(struct inode *inode, struct ext4_xattr_info *i,
+			  struct ext4_xattr_ibody_find *is)
 {
 	struct ext4_xattr_ibody_header *header;
 	struct ext4_inode *raw_inode;
@@ -985,10 +968,47 @@
 	return 0;
 }
 
-static int
-ext4_xattr_ibody_set(handle_t *handle, struct inode *inode,
-		     struct ext4_xattr_info *i,
-		     struct ext4_xattr_ibody_find *is)
+int ext4_xattr_ibody_inline_set(handle_t *handle, struct inode *inode,
+				struct ext4_xattr_info *i,
+				struct ext4_xattr_ibody_find *is)
+{
+	struct ext4_xattr_ibody_header *header;
+	struct ext4_xattr_search *s = &is->s;
+	int error;
+
+	if (EXT4_I(inode)->i_extra_isize == 0)
+		return -ENOSPC;
+	error = ext4_xattr_set_entry(i, s);
+	if (error) {
+		if (error == -ENOSPC &&
+		    ext4_has_inline_data(inode)) {
+			error = ext4_try_to_evict_inline_data(handle, inode,
+					EXT4_XATTR_LEN(strlen(i->name) +
+					EXT4_XATTR_SIZE(i->value_len)));
+			if (error)
+				return error;
+			error = ext4_xattr_ibody_find(inode, i, is);
+			if (error)
+				return error;
+			error = ext4_xattr_set_entry(i, s);
+		}
+		if (error)
+			return error;
+	}
+	header = IHDR(inode, ext4_raw_inode(&is->iloc));
+	if (!IS_LAST_ENTRY(s->first)) {
+		header->h_magic = cpu_to_le32(EXT4_XATTR_MAGIC);
+		ext4_set_inode_state(inode, EXT4_STATE_XATTR);
+	} else {
+		header->h_magic = cpu_to_le32(0);
+		ext4_clear_inode_state(inode, EXT4_STATE_XATTR);
+	}
+	return 0;
+}
+
+static int ext4_xattr_ibody_set(handle_t *handle, struct inode *inode,
+				struct ext4_xattr_info *i,
+				struct ext4_xattr_ibody_find *is)
 {
 	struct ext4_xattr_ibody_header *header;
 	struct ext4_xattr_search *s = &is->s;
@@ -1144,9 +1164,17 @@
 {
 	handle_t *handle;
 	int error, retries = 0;
+	int credits = EXT4_DATA_TRANS_BLOCKS(inode->i_sb);
 
 retry:
-	handle = ext4_journal_start(inode, EXT4_DATA_TRANS_BLOCKS(inode->i_sb));
+	/*
+	 * In case of inline data, we may push out the data to a block,
+	 * So reserve the journal space first.
+	 */
+	if (ext4_has_inline_data(inode))
+		credits += ext4_writepage_trans_blocks(inode) + 1;
+
+	handle = ext4_journal_start(inode, credits);
 	if (IS_ERR(handle)) {
 		error = PTR_ERR(handle);
 	} else {
diff --git a/fs/ext4/xattr.h b/fs/ext4/xattr.h
index 91f31ca7..69eda78 100644
--- a/fs/ext4/xattr.h
+++ b/fs/ext4/xattr.h
@@ -21,6 +21,7 @@
 #define EXT4_XATTR_INDEX_TRUSTED		4
 #define	EXT4_XATTR_INDEX_LUSTRE			5
 #define EXT4_XATTR_INDEX_SECURITY	        6
+#define EXT4_XATTR_INDEX_SYSTEM			7
 
 struct ext4_xattr_header {
 	__le32	h_magic;	/* magic number for identification */
@@ -65,7 +66,32 @@
 		EXT4_I(inode)->i_extra_isize))
 #define IFIRST(hdr) ((struct ext4_xattr_entry *)((hdr)+1))
 
-# ifdef CONFIG_EXT4_FS_XATTR
+#define BHDR(bh) ((struct ext4_xattr_header *)((bh)->b_data))
+#define ENTRY(ptr) ((struct ext4_xattr_entry *)(ptr))
+#define BFIRST(bh) ENTRY(BHDR(bh)+1)
+#define IS_LAST_ENTRY(entry) (*(__u32 *)(entry) == 0)
+
+#define EXT4_ZERO_XATTR_VALUE ((void *)-1)
+
+struct ext4_xattr_info {
+	int name_index;
+	const char *name;
+	const void *value;
+	size_t value_len;
+};
+
+struct ext4_xattr_search {
+	struct ext4_xattr_entry *first;
+	void *base;
+	void *end;
+	struct ext4_xattr_entry *here;
+	int not_found;
+};
+
+struct ext4_xattr_ibody_find {
+	struct ext4_xattr_search s;
+	struct ext4_iloc iloc;
+};
 
 extern const struct xattr_handler ext4_xattr_user_handler;
 extern const struct xattr_handler ext4_xattr_trusted_handler;
@@ -90,60 +116,82 @@
 
 extern const struct xattr_handler *ext4_xattr_handlers[];
 
-# else  /* CONFIG_EXT4_FS_XATTR */
+extern int ext4_xattr_ibody_find(struct inode *inode, struct ext4_xattr_info *i,
+				 struct ext4_xattr_ibody_find *is);
+extern int ext4_xattr_ibody_get(struct inode *inode, int name_index,
+				const char *name,
+				void *buffer, size_t buffer_size);
+extern int ext4_xattr_ibody_inline_set(handle_t *handle, struct inode *inode,
+				       struct ext4_xattr_info *i,
+				       struct ext4_xattr_ibody_find *is);
 
-static inline int
-ext4_xattr_get(struct inode *inode, int name_index, const char *name,
-	       void *buffer, size_t size, int flags)
-{
-	return -EOPNOTSUPP;
-}
+extern int ext4_has_inline_data(struct inode *inode);
+extern int ext4_get_inline_size(struct inode *inode);
+extern int ext4_get_max_inline_size(struct inode *inode);
+extern int ext4_find_inline_data_nolock(struct inode *inode);
+extern void ext4_write_inline_data(struct inode *inode,
+				   struct ext4_iloc *iloc,
+				   void *buffer, loff_t pos,
+				   unsigned int len);
+extern int ext4_prepare_inline_data(handle_t *handle, struct inode *inode,
+				    unsigned int len);
+extern int ext4_init_inline_data(handle_t *handle, struct inode *inode,
+				 unsigned int len);
+extern int ext4_destroy_inline_data(handle_t *handle, struct inode *inode);
 
-static inline int
-ext4_xattr_set(struct inode *inode, int name_index, const char *name,
-	       const void *value, size_t size, int flags)
-{
-	return -EOPNOTSUPP;
-}
+extern int ext4_readpage_inline(struct inode *inode, struct page *page);
+extern int ext4_try_to_write_inline_data(struct address_space *mapping,
+					 struct inode *inode,
+					 loff_t pos, unsigned len,
+					 unsigned flags,
+					 struct page **pagep);
+extern int ext4_write_inline_data_end(struct inode *inode,
+				      loff_t pos, unsigned len,
+				      unsigned copied,
+				      struct page *page);
+extern struct buffer_head *
+ext4_journalled_write_inline_data(struct inode *inode,
+				  unsigned len,
+				  struct page *page);
+extern int ext4_da_write_inline_data_begin(struct address_space *mapping,
+					   struct inode *inode,
+					   loff_t pos, unsigned len,
+					   unsigned flags,
+					   struct page **pagep,
+					   void **fsdata);
+extern int ext4_da_write_inline_data_end(struct inode *inode, loff_t pos,
+					 unsigned len, unsigned copied,
+					 struct page *page);
+extern int ext4_try_add_inline_entry(handle_t *handle, struct dentry *dentry,
+				     struct inode *inode);
+extern int ext4_try_create_inline_dir(handle_t *handle,
+				      struct inode *parent,
+				      struct inode *inode);
+extern int ext4_read_inline_dir(struct file *filp,
+				void *dirent, filldir_t filldir,
+				int *has_inline_data);
+extern struct buffer_head *ext4_find_inline_entry(struct inode *dir,
+					const struct qstr *d_name,
+					struct ext4_dir_entry_2 **res_dir,
+					int *has_inline_data);
+extern int ext4_delete_inline_entry(handle_t *handle,
+				    struct inode *dir,
+				    struct ext4_dir_entry_2 *de_del,
+				    struct buffer_head *bh,
+				    int *has_inline_data);
+extern int empty_inline_dir(struct inode *dir, int *has_inline_data);
+extern struct buffer_head *ext4_get_first_inline_block(struct inode *inode,
+					struct ext4_dir_entry_2 **parent_de,
+					int *retval);
+extern int ext4_inline_data_fiemap(struct inode *inode,
+				   struct fiemap_extent_info *fieinfo,
+				   int *has_inline);
+extern int ext4_try_to_evict_inline_data(handle_t *handle,
+					 struct inode *inode,
+					 int needed);
+extern void ext4_inline_data_truncate(struct inode *inode, int *has_inline);
 
-static inline int
-ext4_xattr_set_handle(handle_t *handle, struct inode *inode, int name_index,
-	       const char *name, const void *value, size_t size, int flags)
-{
-	return -EOPNOTSUPP;
-}
-
-static inline void
-ext4_xattr_delete_inode(handle_t *handle, struct inode *inode)
-{
-}
-
-static inline void
-ext4_xattr_put_super(struct super_block *sb)
-{
-}
-
-static __init inline int
-ext4_init_xattr(void)
-{
-	return 0;
-}
-
-static inline void
-ext4_exit_xattr(void)
-{
-}
-
-static inline int
-ext4_expand_extra_isize_ea(struct inode *inode, int new_extra_isize,
-			    struct ext4_inode *raw_inode, handle_t *handle)
-{
-	return -EOPNOTSUPP;
-}
-
-#define ext4_xattr_handlers	NULL
-
-# endif  /* CONFIG_EXT4_FS_XATTR */
+extern int ext4_convert_inline_data(struct inode *inode);
 
 #ifdef CONFIG_EXT4_FS_SECURITY
 extern int ext4_init_security(handle_t *handle, struct inode *inode,
diff --git a/fs/jbd2/journal.c b/fs/jbd2/journal.c
index 484b8d1..dbf41f9 100644
--- a/fs/jbd2/journal.c
+++ b/fs/jbd2/journal.c
@@ -60,7 +60,6 @@
 EXPORT_SYMBOL(jbd2_journal_get_undo_access);
 EXPORT_SYMBOL(jbd2_journal_set_triggers);
 EXPORT_SYMBOL(jbd2_journal_dirty_metadata);
-EXPORT_SYMBOL(jbd2_journal_release_buffer);
 EXPORT_SYMBOL(jbd2_journal_forget);
 #if 0
 EXPORT_SYMBOL(journal_sync_buffer);
diff --git a/fs/jbd2/transaction.c b/fs/jbd2/transaction.c
index d8da40e..42f6615 100644
--- a/fs/jbd2/transaction.c
+++ b/fs/jbd2/transaction.c
@@ -1207,17 +1207,6 @@
 	return ret;
 }
 
-/*
- * jbd2_journal_release_buffer: undo a get_write_access without any buffer
- * updates, if the update decided in the end that it didn't need access.
- *
- */
-void
-jbd2_journal_release_buffer(handle_t *handle, struct buffer_head *bh)
-{
-	BUFFER_TRACE(bh, "entry");
-}
-
 /**
  * void jbd2_journal_forget() - bforget() for potentially-journaled buffers.
  * @handle: transaction handle
diff --git a/include/linux/jbd2.h b/include/linux/jbd2.h
index 3efc43f..1be23d9 100644
--- a/include/linux/jbd2.h
+++ b/include/linux/jbd2.h
@@ -1096,7 +1096,6 @@
 void		 jbd2_journal_set_triggers(struct buffer_head *,
 					   struct jbd2_buffer_trigger_type *type);
 extern int	 jbd2_journal_dirty_metadata (handle_t *, struct buffer_head *);
-extern void	 jbd2_journal_release_buffer (handle_t *, struct buffer_head *);
 extern int	 jbd2_journal_forget (handle_t *, struct buffer_head *);
 extern void	 journal_sync_buffer (struct buffer_head *);
 extern void	 jbd2_journal_invalidatepage(journal_t *,
@@ -1303,15 +1302,21 @@
 
 extern int jbd_blocks_per_page(struct inode *inode);
 
+/* JBD uses a CRC32 checksum */
+#define JBD_MAX_CHECKSUM_SIZE 4
+
 static inline u32 jbd2_chksum(journal_t *journal, u32 crc,
 			      const void *address, unsigned int length)
 {
 	struct {
 		struct shash_desc shash;
-		char ctx[crypto_shash_descsize(journal->j_chksum_driver)];
+		char ctx[JBD_MAX_CHECKSUM_SIZE];
 	} desc;
 	int err;
 
+	BUG_ON(crypto_shash_descsize(journal->j_chksum_driver) >
+		JBD_MAX_CHECKSUM_SIZE);
+
 	desc.shash.tfm = journal->j_chksum_driver;
 	desc.shash.flags = 0;
 	*(u32 *)desc.ctx = crc;
diff --git a/include/trace/events/ext4.h b/include/trace/events/ext4.h
index d49b285..f6372b0 100644
--- a/include/trace/events/ext4.h
+++ b/include/trace/events/ext4.h
@@ -15,6 +15,7 @@
 struct mpage_da_data;
 struct ext4_map_blocks;
 struct ext4_extent;
+struct extent_status;
 
 #define EXT4_I(inode) (container_of(inode, struct ext4_inode_info, vfs_inode))
 
@@ -1519,10 +1520,9 @@
 );
 
 DECLARE_EVENT_CLASS(ext4__map_blocks_exit,
-	TP_PROTO(struct inode *inode, ext4_lblk_t lblk,
-		 ext4_fsblk_t pblk, unsigned int len, int ret),
+	TP_PROTO(struct inode *inode, struct ext4_map_blocks *map, int ret),
 
-	TP_ARGS(inode, lblk, pblk, len, ret),
+	TP_ARGS(inode, map, ret),
 
 	TP_STRUCT__entry(
 		__field(	dev_t,		dev		)
@@ -1530,37 +1530,37 @@
 		__field(	ext4_fsblk_t,	pblk		)
 		__field(	ext4_lblk_t,	lblk		)
 		__field(	unsigned int,	len		)
+		__field(	unsigned int,	flags		)
 		__field(	int,		ret		)
 	),
 
 	TP_fast_assign(
 		__entry->dev    = inode->i_sb->s_dev;
 		__entry->ino    = inode->i_ino;
-		__entry->pblk	= pblk;
-		__entry->lblk	= lblk;
-		__entry->len	= len;
+		__entry->pblk	= map->m_pblk;
+		__entry->lblk	= map->m_lblk;
+		__entry->len	= map->m_len;
+		__entry->flags	= map->m_flags;
 		__entry->ret	= ret;
 	),
 
-	TP_printk("dev %d,%d ino %lu lblk %u pblk %llu len %u ret %d",
+	TP_printk("dev %d,%d ino %lu lblk %u pblk %llu len %u flags %x ret %d",
 		  MAJOR(__entry->dev), MINOR(__entry->dev),
 		  (unsigned long) __entry->ino,
 		  __entry->lblk, __entry->pblk,
-		  __entry->len, __entry->ret)
+		  __entry->len, __entry->flags, __entry->ret)
 );
 
 DEFINE_EVENT(ext4__map_blocks_exit, ext4_ext_map_blocks_exit,
-	TP_PROTO(struct inode *inode, ext4_lblk_t lblk,
-		 ext4_fsblk_t pblk, unsigned len, int ret),
+	TP_PROTO(struct inode *inode, struct ext4_map_blocks *map, int ret),
 
-	TP_ARGS(inode, lblk, pblk, len, ret)
+	TP_ARGS(inode, map, ret)
 );
 
 DEFINE_EVENT(ext4__map_blocks_exit, ext4_ind_map_blocks_exit,
-	TP_PROTO(struct inode *inode, ext4_lblk_t lblk,
-		 ext4_fsblk_t pblk, unsigned len, int ret),
+	TP_PROTO(struct inode *inode, struct ext4_map_blocks *map, int ret),
 
-	TP_ARGS(inode, lblk, pblk, len, ret)
+	TP_ARGS(inode, map, ret)
 );
 
 TRACE_EVENT(ext4_ext_load_extent,
@@ -1680,10 +1680,10 @@
 );
 
 TRACE_EVENT(ext4_ext_handle_uninitialized_extents,
-	TP_PROTO(struct inode *inode, struct ext4_map_blocks *map,
+	TP_PROTO(struct inode *inode, struct ext4_map_blocks *map, int flags,
 		 unsigned int allocated, ext4_fsblk_t newblock),
 
-	TP_ARGS(inode, map, allocated, newblock),
+	TP_ARGS(inode, map, flags, allocated, newblock),
 
 	TP_STRUCT__entry(
 		__field(	dev_t,		dev		)
@@ -1699,7 +1699,7 @@
 	TP_fast_assign(
 		__entry->dev		= inode->i_sb->s_dev;
 		__entry->ino		= inode->i_ino;
-		__entry->flags		= map->m_flags;
+		__entry->flags		= flags;
 		__entry->lblk		= map->m_lblk;
 		__entry->pblk		= map->m_pblk;
 		__entry->len		= map->m_len;
@@ -1707,7 +1707,7 @@
 		__entry->newblk		= newblock;
 	),
 
-	TP_printk("dev %d,%d ino %lu m_lblk %u m_pblk %llu m_len %u flags %d"
+	TP_printk("dev %d,%d ino %lu m_lblk %u m_pblk %llu m_len %u flags %x "
 		  "allocated %d newblock %llu",
 		  MAJOR(__entry->dev), MINOR(__entry->dev),
 		  (unsigned long) __entry->ino,
@@ -2055,6 +2055,106 @@
 		  (unsigned short) __entry->eh_entries)
 );
 
+TRACE_EVENT(ext4_es_insert_extent,
+	TP_PROTO(struct inode *inode, ext4_lblk_t start, ext4_lblk_t len),
+
+	TP_ARGS(inode, start, len),
+
+	TP_STRUCT__entry(
+		__field(	dev_t,	dev			)
+		__field(	ino_t,	ino			)
+		__field(	loff_t,	start			)
+		__field(	loff_t, len			)
+	),
+
+	TP_fast_assign(
+		__entry->dev	= inode->i_sb->s_dev;
+		__entry->ino	= inode->i_ino;
+		__entry->start	= start;
+		__entry->len	= len;
+	),
+
+	TP_printk("dev %d,%d ino %lu es [%lld/%lld)",
+		  MAJOR(__entry->dev), MINOR(__entry->dev),
+		  (unsigned long) __entry->ino,
+		  __entry->start, __entry->len)
+);
+
+TRACE_EVENT(ext4_es_remove_extent,
+	TP_PROTO(struct inode *inode, ext4_lblk_t start, ext4_lblk_t len),
+
+	TP_ARGS(inode, start, len),
+
+	TP_STRUCT__entry(
+		__field(	dev_t,	dev			)
+		__field(	ino_t,	ino			)
+		__field(	loff_t,	start			)
+		__field(	loff_t,	len			)
+	),
+
+	TP_fast_assign(
+		__entry->dev	= inode->i_sb->s_dev;
+		__entry->ino	= inode->i_ino;
+		__entry->start	= start;
+		__entry->len	= len;
+	),
+
+	TP_printk("dev %d,%d ino %lu es [%lld/%lld)",
+		  MAJOR(__entry->dev), MINOR(__entry->dev),
+		  (unsigned long) __entry->ino,
+		  __entry->start, __entry->len)
+);
+
+TRACE_EVENT(ext4_es_find_extent_enter,
+	TP_PROTO(struct inode *inode, ext4_lblk_t start),
+
+	TP_ARGS(inode, start),
+
+	TP_STRUCT__entry(
+		__field(	dev_t,		dev		)
+		__field(	ino_t,		ino		)
+		__field(	ext4_lblk_t,	start		)
+	),
+
+	TP_fast_assign(
+		__entry->dev	= inode->i_sb->s_dev;
+		__entry->ino	= inode->i_ino;
+		__entry->start	= start;
+	),
+
+	TP_printk("dev %d,%d ino %lu start %u",
+		  MAJOR(__entry->dev), MINOR(__entry->dev),
+		  (unsigned long) __entry->ino, __entry->start)
+);
+
+TRACE_EVENT(ext4_es_find_extent_exit,
+	TP_PROTO(struct inode *inode, struct extent_status *es,
+		 ext4_lblk_t ret),
+
+	TP_ARGS(inode, es, ret),
+
+	TP_STRUCT__entry(
+		__field(	dev_t,		dev		)
+		__field(	ino_t,		ino		)
+		__field(	ext4_lblk_t,	start		)
+		__field(	ext4_lblk_t,	len		)
+		__field(	ext4_lblk_t,	ret		)
+	),
+
+	TP_fast_assign(
+		__entry->dev	= inode->i_sb->s_dev;
+		__entry->ino	= inode->i_ino;
+		__entry->start	= es->start;
+		__entry->len	= es->len;
+		__entry->ret	= ret;
+	),
+
+	TP_printk("dev %d,%d ino %lu es [%u/%u) ret %u",
+		  MAJOR(__entry->dev), MINOR(__entry->dev),
+		  (unsigned long) __entry->ino,
+		  __entry->start, __entry->len, __entry->ret)
+);
+
 #endif /* _TRACE_EXT4_H */
 
 /* This part must be outside protection */