Commit 8b1e7076 authored by Christoph Hellwig's avatar Christoph Hellwig Committed by Jan Kara
Browse files

ext2: use iomap_fiemap to implement ->fiemap 

Switch from generic_block_fiemap to use the iomap version.  The only
interesting part is that ext2_get_blocks gets confused when being
asked for overly long ranges, so copy over the limit to the inode
size from generic_block_fiemap into ext2_fiemap.

Link: https://lore.kernel.org/r/20210720133341.405438-3-hch@lst.de


Signed-off-by: default avatarChristoph Hellwig <hch@lst.de>
Signed-off-by: default avatarJan Kara <jack@suse.cz>
parent 9583db23

fs/ext2/Kconfig

+1 −0
Original line number Diff line number Diff line 
# SPDX-License-Identifier: GPL-2.0-only

config EXT2_FS

	tristate "Second extended fs support"

	select FS_IOMAP

	help

	  Ext2 is a standard Linux file system for hard disks.

fs/ext2/inode.c

+8 −2
Original line number Diff line number Diff line
@@ -855,8 +855,14 @@ const struct iomap_ops ext2_iomap_ops = { 
int ext2_fiemap(struct inode *inode, struct fiemap_extent_info *fieinfo,

		u64 start, u64 len)

{

	return generic_block_fiemap(inode, fieinfo, start, len,

				    ext2_get_block);

	int ret;



	inode_lock(inode);

	len = min_t(u64, len, i_size_read(inode));

	ret = iomap_fiemap(inode, fieinfo, start, len, &ext2_iomap_ops);

	inode_unlock(inode);



	return ret;

}



static int ext2_writepage(struct page *page, struct writeback_control *wbc)