Commit 58736fa6 authored by Chao Yu's avatar Chao Yu Committed by Jaegeuk Kim
Browse files

f2fs: be aware of extent beyond EOF in fiemap 



f2fs can support fallocating blocks beyond file size without changing the
size, but ->fiemap of f2fs was restricted and can't detect these extents
fallocated past EOF, now relieve the restriction.

Signed-off-by: default avatarChao Yu <yuchao0@huawei.com>
Signed-off-by: default avatarJaegeuk Kim <jaegeuk@kernel.org>
parent 6f2d8ed6

fs/f2fs/data.c

+4 −14
Original line number Diff line number Diff line
@@ -886,7 +886,6 @@ int f2fs_fiemap(struct inode *inode, struct fiemap_extent_info *fieinfo, 
	struct buffer_head map_bh;

	sector_t start_blk, last_blk;

	pgoff_t next_pgofs;

	loff_t isize;

	u64 logical = 0, phys = 0, size = 0;

	u32 flags = 0;

	int ret = 0;
@@ -903,13 +902,6 @@ int f2fs_fiemap(struct inode *inode, struct fiemap_extent_info *fieinfo, 


	inode_lock(inode);



	isize = i_size_read(inode);

	if (start >= isize)

		goto out;



	if (start + len > isize)

		len = isize - start;



	if (logical_to_blk(inode, len) == 0)

		len = blk_to_logical(inode, 1);
@@ -928,13 +920,11 @@ next: 
	/* HOLE */

	if (!buffer_mapped(&map_bh)) {

		start_blk = next_pgofs;

		/* Go through holes util pass the EOF */

		if (blk_to_logical(inode, start_blk) < isize)



		if (blk_to_logical(inode, start_blk) < blk_to_logical(inode,

					F2FS_I_SB(inode)->max_file_blocks))

			goto prep_next;

		/* Found a hole beyond isize means no more extents.

		 * Note that the premise is that filesystems don't

		 * punch holes beyond isize and keep size unchanged.

		 */



		flags |= FIEMAP_EXTENT_LAST;

	}

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