ext4: Add inline data support.

index fffec40..dc55c1f 100644
@@ -3762,6 +3762,16 @@ static blkcnt_t ext4_inode_blocks(struct ext4_inode *raw_inode,
 	}
 }
 
+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);
+}
+
 struct inode *ext4_iget(struct super_block *sb, unsigned long ino)
 {
 	struct ext4_iloc iloc;

@@ -3872,13 +3882,8 @@ struct inode *ext4_iget(struct super_block *sb, unsigned long ino)
 			/* The extra space is currently unused. Use it. */
 			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);
-		}
+		} else
+			ext4_iget_extra_inode(inode, raw_inode, ei);
 	} else
 		ei->i_extra_isize = 0;
 

index 93a00d8..71ef45e 100644
@@ -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: ", \

@@ -255,7 +250,7 @@ cleanup:
 	return error;
 }
 
-static int
+int
 ext4_xattr_ibody_get(struct inode *inode, int name_index, const char *name,
 		     void *buffer, size_t buffer_size)
 {

@@ -522,21 +517,6 @@ static size_t ext4_xattr_free_space(struct ext4_xattr_entry *last,
 	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)
 {

@@ -890,14 +870,8 @@ bad_block:
 #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;

@@ -925,10 +899,9 @@ ext4_xattr_ibody_find(struct inode *inode, struct ext4_xattr_info *i,
 	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_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;

75 lines not on this page · raw message

index 5b0e26a..376edfc 100644
@@ -371,6 +371,7 @@ struct flex_groups {
 #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		0x00800000 /* Inode has inline data. */
 #define EXT4_RESERVED_FL		0x80000000 /* reserved for ext4 lib */
 
 #define EXT4_FL_USER_VISIBLE		0x004BDFFF /* User visible flags */

@@ -427,6 +428,7 @@ enum {
 	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	= 23,	/* Data in inode. */
 	EXT4_INODE_RESERVED	= 31,	/* reserved for ext4 lib */
 };
 

@@ -869,6 +871,10 @@ struct ext4_inode_info {
 	/* 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;

@@ -1297,6 +1303,7 @@ enum {
 	EXT4_STATE_DIO_UNWRITTEN,	/* need convert on dio done*/
 	EXT4_STATE_NEWENTRY,		/* File just added to dir */
 	EXT4_STATE_DELALLOC_RESERVED,	/* blks already reserved for delalloc */
+	EXT4_STATE_MAY_INLINE_DATA,	/* may have in-inode data */
 };
 
 #define EXT4_INODE_BIT_FNS(name, field, offset)				\

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index dc55c1f..3342724 100644
@@ -3768,8 +3768,10 @@ static inline void ext4_iget_extra_inode(struct inode *inode,
 {
 	__le32 *magic = (void *)raw_inode +
 			EXT4_GOOD_OLD_INODE_SIZE + ei->i_extra_isize;
-	if (*magic == cpu_to_le32(EXT4_XATTR_MAGIC))
+	if (*magic == cpu_to_le32(EXT4_XATTR_MAGIC)) {
 		ext4_set_inode_state(inode, EXT4_STATE_XATTR);
+		ext4_find_inline_data(inode);
+	}
 }
 
 struct inode *ext4_iget(struct super_block *sb, unsigned long ino)

72 lines not on this page · raw message

index dd2b362..d6451a4 100644
@@ -437,6 +437,58 @@ out:
 	return error;
 }
 
+static int ext4_read_inline_page(struct inode *inode, struct page *page)
+{
+	void *kaddr;
+	loff_t size;
+	int ret = 0;
+	struct ext4_iloc iloc;
+
+	BUG_ON(!PageLocked(page));
+	BUG_ON(!ext4_has_inline_data(inode));
+
+	size = i_size_read(inode);
+
+	if (size > PAGE_CACHE_SIZE ||
+	    size > ext4_get_inline_size(inode)) {
+		ext4_error_inode(inode, __func__, __LINE__, 0,
+			"bad size %ld for a inline file", (long)size);
+		return -EROFS;
+	}
+
+	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;
+
+	kaddr = kmap_atomic(page, KM_USER0);
+	ret = ext4_read_inline_data(inode, kaddr, size, &iloc);
+	flush_dcache_page(page);
+	kunmap_atomic(kaddr, KM_USER0);
+	SetPageUptodate(page);
+	brelse(iloc.bh);
+
+out:
+	return ret;
+}
+
+int ext4_readpage_inline(struct inode *inode, struct page *page)
+{
+	int ret;
+
+	down_read(&EXT4_I(inode)->xattr_sem);
+	ret = ext4_read_inline_page(inode, page);
+	up_read(&EXT4_I(inode)->xattr_sem);
+
+	unlock_page(page);
+	return ret >= 0 ? 0 : ret;
+}
+
 int ext4_destroy_inline_data(handle_t *handle, struct inode *inode)
 {
 	int ret;

index 3342724..837e259 100644
@@ -592,6 +592,9 @@ static int _ext4_get_block(struct inode *inode, sector_t iblock,
 	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;
 

@@ -2634,6 +2637,12 @@ static sector_t ext4_bmap(struct address_space *mapping, sector_t block)
 	journal_t *journal;
 	int err;
 
+	/*
+	 * XXX: Can we arrive here for a inline file? Maybe not.
+	 */
+	if (ext4_has_inline_data(inode))
+		return 0;
+
 	if (mapping_tagged(mapping, PAGECACHE_TAG_DIRTY) &&
 			test_opt(inode->i_sb, DELALLOC)) {
 		/*

@@ -2679,7 +2688,13 @@ static sector_t ext4_bmap(struct address_space *mapping, sector_t block)
 
 static int ext4_readpage(struct file *file, struct page *page)
 {
+	struct inode *inode = file->f_mapping->host;
+
 	trace_ext4_readpage(page);
+
+	if (ext4_has_inline_data(inode))
+		return ext4_readpage_inline(inode, page);
+
 	return mpage_readpage(page, ext4_get_block);
 }
 

@@ -2687,6 +2702,12 @@ 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);
 }
 

@@ -3008,6 +3029,10 @@ static ssize_t ext4_direct_IO(int rw, struct kiocb *iocb,
 	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);

index 9f1b217..bb226f4 100644
@@ -137,6 +137,8 @@ extern int ext4_prepare_inline_data(handle_t *handle, struct inode *inode,
 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);
+
+extern int ext4_readpage_inline(struct inode *inode, struct page *page);
 # else  /* CONFIG_EXT4_FS_XATTR */
 
 static inline int

@@ -252,6 +254,11 @@ static inline int ext4_destroy_inline_data(handle_t *handle,
 {
 	return 0;
 }
+
+static inline int ext4_readpage_inline(struct inode *inode, struct page *page)
+{
+	return 0;
+}
 # endif  /* CONFIG_EXT4_FS_XATTR */
 
 #ifdef CONFIG_EXT4_FS_SECURITY

index 376edfc..ad3d11d 100644
@@ -1863,8 +1863,19 @@ struct buffer_head *ext4_getblk(handle_t *, struct inode *,
 						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 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);
 
 extern struct inode *ext4_iget(struct super_block *, unsigned long);
 extern int  ext4_write_inode(struct inode *, struct writeback_control *);

index 61fa9e1..a0063b7 100644
@@ -42,6 +42,7 @@
 #include <asm/uaccess.h>
 #include <linux/fiemap.h>
 #include "ext4_jbd2.h"
+#include "xattr.h"
 
 #include <trace/events/ext4.h>
 

@@ -2178,7 +2179,13 @@ int ext4_ext_calc_credits_for_single_extent(struct inode *inode, int nrblocks,
 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;

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index bb226f4..06b8506 100644
@@ -139,6 +139,15 @@ extern int ext4_init_inline_data(handle_t *handle, struct inode *inode,
 extern int ext4_destroy_inline_data(handle_t *handle, struct inode *inode);
 
 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);
 # else  /* CONFIG_EXT4_FS_XATTR */
 
 static inline int

@@ -259,6 +268,23 @@ static inline int ext4_readpage_inline(struct inode *inode, struct page *page)
 {
 	return 0;
 }
+
+static inline int ext4_try_to_write_inline_data(struct address_space *mapping,
+						struct inode *inode,
+						loff_t pos, unsigned len,
+						unsigned flags,
+						struct page **pagep)
+{
+	return 0;
+}
+
+static inline int ext4_write_inline_data_end(struct inode *inode,
+					     loff_t pos, unsigned len,
+					     unsigned copied,
+					     struct page *page)
+{
+	return 0;
+}
 # endif  /* CONFIG_EXT4_FS_XATTR */
 
 #ifdef CONFIG_EXT4_FS_SECURITY

index f974d2c..5d5a610 100644
@@ -725,6 +725,30 @@ 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, KM_USER0);
+	ext4_write_inline_data(inode, &iloc, kaddr, 0, len);
+	kunmap_atomic(kaddr, KM_USER0);
+	up_write(&EXT4_I(inode)->xattr_sem);
+
+	return iloc.bh;
+}
+
 
 int ext4_destroy_inline_data(handle_t *handle, struct inode *inode)
 {

92 lines not on this page · raw message

index 06b8506..48a629f 100644
@@ -148,6 +148,10 @@ 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);
 # else  /* CONFIG_EXT4_FS_XATTR */
 
 static inline int

@@ -285,6 +289,14 @@ static inline int ext4_write_inline_data_end(struct inode *inode,
 {
 	return 0;
 }
+
+static inline struct buffer_head *
+ext4_journalled_write_inline_data(struct inode *inode,
+				  unsigned len,
+				  struct page *page)
+{
+	return NULL;
+}
 # endif  /* CONFIG_EXT4_FS_XATTR */
 
 #ifdef CONFIG_EXT4_FS_SECURITY

index ad3d11d..33e7b06 100644
@@ -1867,6 +1867,8 @@ 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 walk_page_buffers(handle_t *handle,
 			     struct buffer_head *head,
 			     unsigned from,

@@ -1876,6 +1878,8 @@ int walk_page_buffers(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 *);

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index 48a629f..a0d43c7 100644
@@ -152,6 +152,15 @@ 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);
 # else  /* CONFIG_EXT4_FS_XATTR */
 
 static inline int

@@ -297,6 +306,24 @@ ext4_journalled_write_inline_data(struct inode *inode,
 {
 	return NULL;
 }
+
+static inline 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)
+{
+	return 0;
+}
+
+static inline int ext4_da_write_inline_data_end(struct inode *inode, loff_t pos,
+						unsigned len, unsigned copied,
+						struct page *page)
+{
+	return 0;
+}
 # endif  /* CONFIG_EXT4_FS_XATTR */
 
 #ifdef CONFIG_EXT4_FS_SECURITY

index 33e7b06..274dec5 100644
@@ -2256,6 +2256,8 @@ extern loff_t ext4_llseek(struct file *file, loff_t offset, int origin);
 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);
+void ext4_init_dot_dotdot(struct inode *parent, struct inode *inode,
+			  struct ext4_dir_entry_2 *de, int blocksize);
 
 /* symlink.c */
 extern const struct inode_operations ext4_symlink_inode_operations;

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index 164c560..6c2199e 100644
@@ -68,7 +68,7 @@ static unsigned char get_dtype(struct super_block *sb, int filetype)
 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;

@@ -81,9 +81,8 @@ int __ext4_check_dir_entry(const char *function, unsigned int line,
 		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";

@@ -94,14 +93,14 @@ int __ext4_check_dir_entry(const char *function, unsigned int line,
 		ext4_error_file(filp, function, line, bh ? bh->b_blocknr : 0,
 				"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 ? bh->b_blocknr : 0,
 				"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);
 

@@ -210,8 +209,9 @@ revalidate:
 		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
 				 */

index 274dec5..f235b0a 100644
@@ -1808,10 +1808,11 @@ ext4_fsblk_t ext4_inode_to_goal_block(struct inode *);
 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);

index 14ecbd2..aae0f5b 100644
@@ -583,6 +583,7 @@ static int htree_dirblock_to_tree(struct file *dir_file,
 					   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. */

@@ -821,7 +822,8 @@ static inline int search_dirblock(struct buffer_head *bh,
 		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;

@@ -1267,7 +1269,8 @@ static int add_dirent_to_buf(handle_t *handle, struct dentry *dentry,
 		de = (struct ext4_dir_entry_2 *)bh->b_data;
 		top = bh->b_data + blocksize - reclen;
 		while ((char *) de <= top) {
-			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 -EIO;
 			if (ext4_match(namelen, name, de))
 				return -EEXIST;

@@ -1650,7 +1653,8 @@ static int ext4_delete_entry(handle_t *handle,
 	pde = NULL;
 	de = (struct ext4_dir_entry_2 *) bh->b_data;
 	while (i < bh->b_size) {
-		if (ext4_check_dir_entry(dir, NULL, de, bh, i))
+		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");

@@ -1963,7 +1967,8 @@ static int empty_dir(struct inode *inode)
 			}
 			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;

index f235b0a..e5847b4 100644
@@ -1817,6 +1817,21 @@ 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);
+}
 
 /* fsync.c */
 extern int ext4_sync_file(struct file *, loff_t, loff_t, int);

140 lines not on this page · raw message

index e5847b4..e61c967 100644
@@ -2262,6 +2262,8 @@ static inline void ext4_mark_super_dirty(struct super_block *sb)
 
 /* dir.c */
 extern const struct file_operations ext4_dir_operations;
+extern void ext4_show_inline_dir(struct inode *dir, struct buffer_head *bh,
+				 void *inline_start, int inline_size);
 
 /* file.c */
 extern const struct inode_operations ext4_file_inode_operations;

282 lines not on this page · raw message

index 21acbc9..77312dc 100644
@@ -1486,6 +1486,17 @@ static int ext4_add_entry(handle_t *handle, struct dentry *dentry,
 	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))

@@ -1862,6 +1873,14 @@ static int ext4_init_new_dir(handle_t *handle, struct inode *parent,
 	int err;
 	int blocksize = inode->i_sb->s_blocksize;
 
+	if (ext4_test_inode_state(inode, EXT4_STATE_MAY_INLINE_DATA)) {
+		err = ext4_try_create_inline_dir(handle, parent, 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)

index a0d43c7..0229a78 100644
@@ -161,6 +161,11 @@ extern int ext4_da_write_inline_data_begin(struct address_space *mapping,
 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);
 # else  /* CONFIG_EXT4_FS_XATTR */
 
 static inline int

@@ -324,6 +329,20 @@ static inline int ext4_da_write_inline_data_end(struct inode *inode, loff_t pos,
 {
 	return 0;
 }
+
+static inline int ext4_try_add_inline_entry(handle_t *handle,
+					    struct dentry *dentry,
+					    struct inode *inode)
+{
+	return 0;
+}
+
+static inline int ext4_try_create_inline_dir(handle_t *handle,
+					     struct inode *parent,
+					     struct inode *inode)
+{
+	return 0;
+}
 # endif  /* CONFIG_EXT4_FS_XATTR */
 
 #ifdef CONFIG_EXT4_FS_SECURITY

index 6c2199e..691548c 100644
@@ -27,10 +27,7 @@
 #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_readdir(struct file *, void *, filldir_t);
 static int ext4_dx_readdir(struct file *filp,

@@ -51,19 +48,13 @@ const struct file_operations ext4_dir_operations = {
 };
 
 
-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]);
-}
-
 /*
  * 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,

@@ -122,6 +113,12 @@ static int ext4_readdir(struct file *filp,
 
 	sb = inode->i_sb;
 
+	if (ext4_has_inline_data(inode)) {
+		ret = ext4_read_inline_dir(filp, dirent, filldir);
+		if (ret > 0 || ret < 0)
+			return ret;
+	}
+
 	if (EXT4_HAS_COMPAT_FEATURE(inode->i_sb,
 				    EXT4_FEATURE_COMPAT_DIR_INDEX) &&
 	    ((ext4_test_inode_flag(inode, EXT4_INODE_INDEX)) ||

index e61c967..25d6e58 100644
@@ -1832,6 +1832,18 @@ static inline void ext4_update_dx_flag(struct inode *inode)
 				     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);

130 lines not on this page · raw message

index 0229a78..e9e23ba 100644
@@ -166,6 +166,8 @@ extern int ext4_try_add_inline_entry(handle_t *handle, struct dentry *dentry,
 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);
 # else  /* CONFIG_EXT4_FS_XATTR */
 
 static inline int

@@ -343,6 +345,11 @@ static inline int ext4_try_create_inline_dir(handle_t *handle,
 {
 	return 0;
 }
+static inline int ext4_read_inline_dir(struct file *filp,
+				       void *dirent, filldir_t filldir)
+{
+	return 0;
+}
 # endif  /* CONFIG_EXT4_FS_XATTR */
 
 #ifdef CONFIG_EXT4_FS_SECURITY

index 25d6e58..16efcad 100644
@@ -1967,6 +1967,13 @@ extern int ext4_orphan_add(handle_t *, struct inode *);
 extern int ext4_orphan_del(handle_t *, struct inode *);
 extern int ext4_htree_fill_tree(struct file *dir_file, __u32 start_hash,
 				__u32 start_minor_hash, __u32 *next_hash);
+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);
 
 /* resize.c */
 extern int ext4_group_add(struct super_block *sb,

index 77312dc..6e97dd2 100644
@@ -794,11 +794,13 @@ static inline int ext4_match (int len, const char * const name,
 /*
  * 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;

@@ -806,8 +808,8 @@ static inline int search_dirblock(struct buffer_head *bh,
 	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' */

@@ -832,6 +834,16 @@ static inline int search_dirblock(struct buffer_head *bh,
 	return 0;
 }
 
+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);
+}
+
 
 /*
  *	ext4_find_entry()

index 0a41d64..7e80416 100644
@@ -1327,6 +1327,53 @@ out:
 	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 = ext4_raw_inode(&iloc)->i_block;
+	inline_size = 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;
+	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_destroy_inline_data(handle_t *handle, struct inode *inode)
 {
 	int ret;

index 6e97dd2..92f7b67 100644
@@ -844,7 +844,6 @@ static inline int search_dirblock(struct buffer_head *bh,
 			  d_name, offset, res_dir);
 }
 
-
 /*
  *	ext4_find_entry()
  *

@@ -879,6 +878,15 @@ static struct buffer_head * ext4_find_entry (struct inode *dir,
 	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)
+			return ret;
+	}
+
 	if ((namelen <= 2) && (name[0] == '.') &&
 	    (name[1] == '.' || name[1] == '\0')) {
 		/*

index e9e23ba..45f3ce9 100644
@@ -168,6 +168,10 @@ extern int ext4_try_create_inline_dir(handle_t *handle,
 				      struct inode *inode);
 extern int ext4_read_inline_dir(struct file *filp,
 				void *dirent, filldir_t filldir);
+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);
 # else  /* CONFIG_EXT4_FS_XATTR */
 
 static inline int

@@ -350,6 +354,14 @@ static inline int ext4_read_inline_dir(struct file *filp,
 {
 	return 0;
 }
+
+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)
+{
+	return NULL;
+}
 # endif  /* CONFIG_EXT4_FS_XATTR */
 
 #ifdef CONFIG_EXT4_FS_SECURITY

index 16efcad..48185ba 100644
@@ -1974,6 +1974,12 @@ extern int search_dir(struct buffer_head *bh,
 		      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);
 
 /* resize.c */
 extern int ext4_group_add(struct super_block *sb,

91 lines not on this page · raw message

index 7e80416..1d5cfd0 100644
@@ -1374,6 +1374,57 @@ out_find:
 	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 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))
+		goto out;
+
+	if ((void *)de_del - ((void *)ext4_raw_inode(&iloc)->i_block) <
+		EXT4_MIN_INLINE_DATA_SIZE) {
+		inline_start = ext4_raw_inode(&iloc)->i_block;
+		inline_size = EXT4_MIN_INLINE_DATA_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);
+	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);
+	err = 1;
+out:
+	up_write(&EXT4_I(dir)->xattr_sem);
+	brelse(iloc.bh);
+	if (err != 1 && err != -ENOENT)
+		ext4_std_error(dir->i_sb, err);
+	return err;
+}
+
 int ext4_destroy_inline_data(handle_t *handle, struct inode *inode)
 {
 	int ret;

index f706b0f..cefcec6 100644
@@ -1741,6 +1741,15 @@ static int ext4_delete_entry(handle_t *handle,
 {
 	int err;
 
+	if (ext4_has_inline_data(dir)) {
+		err = ext4_delete_inline_entry(handle, dir, de_del, bh);
+		if (err) {
+			if (err == 1)
+				err = 0;
+			return err;
+		}
+	}
+
 	BUFFER_TRACE(bh, "get_write_access");
 	err = ext4_journal_get_write_access(handle, bh);
 	if (unlikely(err))

index 45f3ce9..e26b7a6 100644
@@ -172,6 +172,10 @@ 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);
 # else  /* CONFIG_EXT4_FS_XATTR */
 
 static inline int

@@ -362,6 +366,13 @@ struct buffer_head *ext4_find_inline_entry(struct inode *dir,
 {
 	return NULL;
 }
+static inline int ext4_delete_inline_entry(handle_t *handle,
+					   struct inode *dir,
+					   struct ext4_dir_entry_2 *de_del,
+					   struct buffer_head *bh)
+{
+	return 0;
+}
 # endif  /* CONFIG_EXT4_FS_XATTR */
 
 #ifdef CONFIG_EXT4_FS_SECURITY

index 1d5cfd0..1872532 100644
@@ -1425,6 +1425,75 @@ out:
 	return err;
 }
 
+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, *de1;
+	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 = ext4_get_inline_entry(dir, &iloc, 0,
+				   &inline_pos, &inline_size);
+	de1 = ext4_get_inline_entry(dir, &iloc,
+			ext4_rec_len_from_disk(de->rec_len, inline_size),
+			&inline_pos, &inline_size);
+	if (le32_to_cpu(de->inode) != dir->i_ino ||
+			!le32_to_cpu(de1->inode) ||
+			strcmp(".", de->name) ||
+			strcmp("..", de1->name)) {
+		ext4_warning(dir->i_sb,
+			     "bad directory (dir #%lu) - no `.' or `..'",
+			     dir->i_ino);
+		ret = 1;
+		goto out;
+	}
+
+	offset = ext4_rec_len_from_disk(de->rec_len, inline_size) +
+		 ext4_rec_len_from_disk(de1->rec_len, inline_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;

index cefcec6..24cdb61 100644
@@ -2015,6 +2015,14 @@ static int empty_dir(struct inode *inode)
 	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))) {

index e26b7a6..ed707df 100644
@@ -176,6 +176,7 @@ extern int ext4_delete_inline_entry(handle_t *handle,
 				    struct inode *dir,
 				    struct ext4_dir_entry_2 *de_del,
 				    struct buffer_head *bh);
+extern int empty_inline_dir(struct inode *dir, int *has_inline_data);
 # else  /* CONFIG_EXT4_FS_XATTR */
 
 static inline int

@@ -373,6 +374,11 @@ static inline int ext4_delete_inline_entry(handle_t *handle,
 {
 	return 0;
 }
+
+static inline int empty_inline_dir(struct inode *dir, int *has_inline_data)
+{
+	return 0;
+}
 # endif  /* CONFIG_EXT4_FS_XATTR */
 
 #ifdef CONFIG_EXT4_FS_SECURITY

index 1872532..3159f32 100644
@@ -1327,6 +1327,21 @@ out:
 	return ret;
 }
 
+struct buffer_head *ext4_get_first_inline_block(struct inode *inode,
+				void **buf, int *buf_size, int *retval)
+{
+	struct ext4_iloc iloc;
+
+	*retval = ext4_get_inode_loc(inode, &iloc);
+	if (*retval)
+		return NULL;
+
+	*buf = ext4_raw_inode(&iloc)->i_block;
+	*buf_size = EXT4_MIN_INLINE_DATA_SIZE;
+
+	return iloc.bh;
+}
+
 struct buffer_head *ext4_find_inline_entry(struct inode *dir,
 					const struct qstr *d_name,
 					struct ext4_dir_entry_2 **res_dir,

index 24cdb61..cc4db68 100644
@@ -2507,6 +2507,31 @@ retry:
 	(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,
+						    void **buf,
+						    int *buf_size,
+						    int *retval)
+{
+	struct buffer_head *bh;
+
+	if (!ext4_has_inline_data(inode)) {
+		bh = ext4_bread(handle, inode, 0, 0, retval);
+		if (!bh)
+			return NULL;
+		*buf = bh->b_data;
+		*buf_size = inode->i_sb->s_blocksize;
+		return bh;
+	}
+
+	return ext4_get_first_inline_block(inode, buf, buf_size, retval);
+}
+
+/*
  * Anybody can rename anything with this: the permission checks are left to the
  * higher-level routines.
  */

@@ -2517,7 +2542,8 @@ static int ext4_rename(struct inode *old_dir, struct dentry *old_dentry,
 	struct inode *old_inode, *new_inode;
 	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 buf_size, retval, force_da_alloc = 0;
+	void *dir_buf = NULL;
 
 	dquot_initialize(old_dir);
 	dquot_initialize(new_dir);

@@ -2564,11 +2590,12 @@ static int ext4_rename(struct inode *old_dir, struct dentry *old_dentry,
 				goto end_rename;
 		}
 		retval = -EIO;
-		dir_bh = ext4_bread(handle, old_inode, 0, 0, &retval);
+		dir_bh = ext4_get_first_dir_block(handle, old_inode,
+						  &dir_buf, &buf_size, &retval);
 		if (!dir_bh)
 			goto end_rename;
-		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_INO(dir_buf,
+					   buf_size)) != old_dir->i_ino)
 			goto end_rename;
 		retval = -EMLINK;
 		if (!new_inode && new_dir != old_dir &&

@@ -2648,8 +2675,7 @@ static int ext4_rename(struct inode *old_dir, struct dentry *old_dentry,
 	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_INO(dir_buf, buf_size) = cpu_to_le32(new_dir->i_ino);
 		BUFFER_TRACE(dir_bh, "call ext4_handle_dirty_metadata");
 		retval = ext4_handle_dirty_metadata(handle, old_inode, dir_bh);
 		if (retval) {

index ed707df..55bb2fc 100644
@@ -177,6 +177,10 @@ extern int ext4_delete_inline_entry(handle_t *handle,
 				    struct ext4_dir_entry_2 *de_del,
 				    struct buffer_head *bh);
 extern int empty_inline_dir(struct inode *dir, int *has_inline_data);
+extern struct buffer_head *ext4_get_first_inline_block(struct inode *inode,
+						       void **buf,
+						       int *buf_size,
+						       int *retval);
 # else  /* CONFIG_EXT4_FS_XATTR */
 
 static inline int

@@ -379,6 +383,14 @@ static inline int empty_inline_dir(struct inode *dir, int *has_inline_data)
 {
 	return 0;
 }
+
+static inline struct buffer_head *
+ext4_get_first_inline_block(struct inode *inode,
+			    void **buf, int *buf_size,
+			    int *retval)
+{
+	return NULL;
+}
 # endif  /* CONFIG_EXT4_FS_XATTR */
 
 #ifdef CONFIG_EXT4_FS_SECURITY

index a0063b7..45e1c12 100644
@@ -4923,6 +4923,15 @@ int ext4_fiemap(struct inode *inode, struct fiemap_extent_info *fieinfo,
 	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,

index 3159f32..4203aa4 100644
@@ -15,6 +15,7 @@
 #include "ext4.h"
 #include "xattr.h"
 #include "truncate.h"
+#include <linux/fiemap.h>
 
 #define EXT4_XATTR_SYSTEM_DATA_NAME	"data"
 #define EXT4_MIN_INLINE_DATA_SIZE	((sizeof(__le32) * EXT4_N_BLOCKS))

@@ -1519,3 +1520,37 @@ int ext4_destroy_inline_data(handle_t *handle, struct inode *inode)
 
 	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);
+}

index 55bb2fc..6bfdf9c 100644
@@ -181,6 +181,9 @@ extern struct buffer_head *ext4_get_first_inline_block(struct inode *inode,
 						       void **buf,
 						       int *buf_size,
 						       int *retval);
+extern int ext4_inline_data_fiemap(struct inode *inode,
+				   struct fiemap_extent_info *fieinfo,
+				   int *has_inline);
 # else  /* CONFIG_EXT4_FS_XATTR */
 
 static inline int

@@ -391,6 +394,13 @@ ext4_get_first_inline_block(struct inode *inode,
 {
 	return NULL;
 }
+
+static inline int ext4_inline_data_fiemap(struct inode *inode,
+					  struct fiemap_extent_info *fieinfo,
+					  int *has_inline)
+{
+	return 0;
+}
 # endif  /* CONFIG_EXT4_FS_XATTR */
 
 #ifdef CONFIG_EXT4_FS_SECURITY

index 4203aa4..f6f27e1 100644
@@ -1554,3 +1554,89 @@ 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;
+	void *buf = NULL;
+	struct buffer_head *data_bh = NULL;
+	struct ext4_map_blocks map;
+
+	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;
+	}
+
+	buf = kmalloc(ext4_get_inline_size(inode), GFP_NOFS);
+	if (!buf) {
+		error = -ENOMEM;
+		goto out;
+	}
+
+	error = ext4_read_inline_data(inode, buf,
+				      ext4_get_inline_size(inode), &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;
+	if (!(map.m_flags & EXT4_MAP_MAPPED)) {
+		error = -EIO;
+		goto out;
+	}
+
+	data_bh = sb_getblk(inode->i_sb, map.m_pblk);
+	if (!data_bh) {
+		error = -EIO;
+		goto out;
+	}
+
+	lock_buffer(data_bh);
+	error = ext4_journal_get_create_access(handle, data_bh);
+	if (error) {
+		unlock_buffer(data_bh);
+		error = -EIO;
+		goto out;
+	}
+	memcpy(data_bh->b_data, buf, data_bh->b_size);
+	set_buffer_uptodate(data_bh);
+	unlock_buffer(data_bh);
+	error = ext4_handle_dirty_metadata(handle,
+					   inode, data_bh);
+out:
+	brelse(data_bh);
+	kfree(buf);
+	brelse(iloc.bh);
+	return error;
+}

index 71ef45e..6785250 100644
@@ -910,8 +910,21 @@ int ext4_xattr_ibody_set(handle_t *handle, struct inode *inode,
 	if (EXT4_I(inode)->i_extra_isize == 0)
 		return -ENOSPC;
 	error = ext4_xattr_set_entry(i, s);
-	if (error)
+	if (error && error != -ENOSPC)
 		return error;
+	if (error && 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);

@@ -1057,9 +1070,17 @@ ext4_xattr_set(struct inode *inode, int name_index, const char *name,
 {
 	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 {

index 6bfdf9c..feb06ec 100644
@@ -184,6 +184,9 @@ extern struct buffer_head *ext4_get_first_inline_block(struct inode *inode,
 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);
 # else  /* CONFIG_EXT4_FS_XATTR */
 
 static inline int

index 48185ba..ca1f79f 100644
@@ -1416,6 +1416,7 @@ static inline void ext4_clear_state_flags(struct ext4_inode_info *ei)
 #define EXT4_FEATURE_INCOMPAT_FLEX_BG		0x0200
 #define EXT4_FEATURE_INCOMPAT_EA_INODE		0x0400 /* EA in inode */
 #define EXT4_FEATURE_INCOMPAT_DIRDATA		0x1000 /* data in dirent */
+#define EXT4_FEATURE_INCOMPAT_INLINEDATA	0x8000 /* data in inode */
 
 #define EXT2_FEATURE_COMPAT_SUPP	EXT4_FEATURE_COMPAT_EXT_ATTR
 #define EXT2_FEATURE_INCOMPAT_SUPP	(EXT4_FEATURE_INCOMPAT_FILETYPE| \

@@ -1439,7 +1440,8 @@ static inline void ext4_clear_state_flags(struct ext4_inode_info *ei)
 					 EXT4_FEATURE_INCOMPAT_EXTENTS| \
 					 EXT4_FEATURE_INCOMPAT_64BIT| \
 					 EXT4_FEATURE_INCOMPAT_FLEX_BG| \
-					 EXT4_FEATURE_INCOMPAT_MMP)
+					 EXT4_FEATURE_INCOMPAT_MMP |	\
+					 EXT4_FEATURE_INCOMPAT_INLINEDATA)
 #define EXT4_FEATURE_RO_COMPAT_SUPP	(EXT4_FEATURE_RO_COMPAT_SPARSE_SUPER| \
 					 EXT4_FEATURE_RO_COMPAT_LARGE_FILE| \
 					 EXT4_FEATURE_RO_COMPAT_GDT_CSUM| \

index 00beb4f..4f7fe21 100644
@@ -897,6 +897,10 @@ got:
 
 	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_INLINEDATA))
+		ext4_set_inode_state(inode, EXT4_STATE_MAY_INLINE_DATA);
+
 	ret = inode;
 	dquot_initialize(inode);
 	err = dquot_alloc_inode(inode);