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Commit 2587b1f1 authored by Darrick J. Wong's avatar Darrick J. Wong Committed by Dave Chinner
Browse files

ocfs2: truncate page cache for clone destination file before remapping 



When cloning blocks into another file, truncate the page cache before we
start remapping blocks so that concurrent reads wait for us to finish.

Signed-off-by: default avatarDarrick J. Wong <darrick.wong@oracle.com>
Reviewed-by: default avatarDave Chinner <dchinner@redhat.com>
Signed-off-by: default avatarDave Chinner <david@fromorbit.com>
parent 8c5c836b

fs/ocfs2/refcounttree.c

+4 −6
Original line number Diff line number Diff line
@@ -4861,14 +4861,12 @@ int ocfs2_reflink_remap_range(struct file *file_in, 
		down_write_nested(&OCFS2_I(inode_out)->ip_alloc_sem,

				  SINGLE_DEPTH_NESTING);



	ret = ocfs2_reflink_remap_blocks(inode_in, in_bh, pos_in, inode_out,

					 out_bh, pos_out, len);



	/* Zap any page cache for the destination file's range. */

	if (!ret)

	truncate_inode_pages_range(&inode_out->i_data, pos_out,

				   PAGE_ALIGN(pos_out + len) - 1);



	ret = ocfs2_reflink_remap_blocks(inode_in, in_bh, pos_in, inode_out,

					 out_bh, pos_out, len);

	up_write(&OCFS2_I(inode_in)->ip_alloc_sem);

	if (!same_inode)

		up_write(&OCFS2_I(inode_out)->ip_alloc_sem);