Commit 0c8d414f authored by Tao Ma's avatar Tao Ma Committed by Theodore Ts'o
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ext4: let fallocate handle inline data correctly 



If we are punching hole in a file, we will return ENOTSUPP.
As for the fallocation of some extents, we will convert the
inline data to a normal extent based file first.

Signed-off-by: default avatarTao Ma <boyu.mt@taobao.com>
Signed-off-by: default avatar"Theodore Ts'o" <tytso@mit.edu>
parent aef1c851

fs/ext4/extents.c

+4 −0
Original line number Diff line number Diff line
@@ -4399,6 +4399,10 @@ long ext4_fallocate(struct file *file, int mode, loff_t offset, loff_t len) 
	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;

	/*

fs/ext4/inline.c

+39 −0
Original line number Diff line number Diff line
@@ -1843,3 +1843,42 @@ void ext4_inline_data_truncate(struct inode *inode, int *has_inline) 
	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;

}

fs/ext4/xattr.h

+5 −0
Original line number Diff line number Diff line
@@ -192,6 +192,7 @@ extern int ext4_try_to_evict_inline_data(handle_t *handle, 
					 int needed);

extern void ext4_inline_data_truncate(struct inode *inode, int *has_inline);



extern int ext4_convert_inline_data(struct inode *inode);

# else  /* CONFIG_EXT4_FS_XATTR */



static inline int
@@ -420,6 +421,10 @@ static inline void ext4_inline_data_truncate(struct inode *inode, 
	return;

}



static inline int ext4_convert_inline_data(struct inode *inode)

{

	return 0;

}

# endif  /* CONFIG_EXT4_FS_XATTR */



#ifdef CONFIG_EXT4_FS_SECURITY