Commit 9969441f authored Jun 04, 2015 by Dave Chinner Committed by Dave Chinner Jun 04, 2015

xfs: add DAX truncate support



When we truncate a DAX file, we need to call through the DAX page
truncation path rather than through block_truncate_page() so that
mappings and block zeroing are all handled correctly. Otherwise,
truncate does not need to change.

Signed-off-by: Dave Chinner <dchinner@redhat.com>
Reviewed-by: Brian Foster <bfoster@redhat.com>
Signed-off-by: Dave Chinner <david@fromorbit.com>

parent 4f69f578

fs/xfs/xfs_iops.c

+5 −1

Original line number	Diff line number	Diff line
		@@ -851,7 +851,11 @@ xfs_setattr_size(
		* to hope that the caller sees ENOMEM and retries the truncate
		* operation.
		*/
		error = block_truncate_page(inode->i_mapping, newsize, xfs_get_blocks);
		if (IS_DAX(inode))
		error = dax_truncate_page(inode, newsize, xfs_get_blocks_direct);
		else
		error = block_truncate_page(inode->i_mapping, newsize,
		xfs_get_blocks);
		if (error)
		return error;
		truncate_setsize(inode, newsize);