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Commit 61f86638 authored by Tao Ma's avatar Tao Ma Committed by Theodore Ts'o
Browse files

ext4: let empty_dir handle inline dir 



empty_dir is used when deleting a dir.  So it should handle inline dir
properly.

Signed-off-by: default avatarTao Ma <boyu.mt@taobao.com>
Signed-off-by: default avatar"Theodore Ts'o" <tytso@mit.edu>
parent 9f40fe54

fs/ext4/inline.c

+90 −0
Original line number Diff line number Diff line
@@ -1565,6 +1565,96 @@ int ext4_delete_inline_entry(handle_t *handle, 
	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;

fs/ext4/namei.c

+8 −0
Original line number Diff line number Diff line
@@ -2464,6 +2464,14 @@ 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))) {

fs/ext4/xattr.h

+6 −0
Original line number Diff line number Diff line
@@ -180,6 +180,7 @@ extern int ext4_delete_inline_entry(handle_t *handle, 
				    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);

# else  /* CONFIG_EXT4_FS_XATTR */



static inline int
@@ -381,6 +382,11 @@ 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