Commit 032dc923 authored by Christoph Hellwig's avatar Christoph Hellwig Committed by Dave Chinner
Browse files

xfs: fix fork selection in xfs_find_trim_cow_extent 



We should want to write directly into the data fork for blocks that don't
have an extent in the COW fork covering them yet.

Signed-off-by: default avatarChristoph Hellwig <hch@lst.de>
Reviewed-by: default avatarBrian Foster <bfoster@redhat.com>
Signed-off-by: default avatarDave Chinner <david@fromorbit.com>
parent d392bc81

fs/xfs/xfs_reflink.c

+6 −2
Original line number Diff line number Diff line
@@ -369,9 +369,13 @@ xfs_find_trim_cow_extent( 
	 * If we don't find an overlapping extent, trim the range we need to

	 * allocate to fit the hole we found.

	 */

	if (!xfs_iext_lookup_extent(ip, ip->i_cowfp, offset_fsb, &icur, &got) ||

	    got.br_startoff > offset_fsb)

	if (!xfs_iext_lookup_extent(ip, ip->i_cowfp, offset_fsb, &icur, &got))

		got.br_startoff = offset_fsb + count_fsb;

	if (got.br_startoff > offset_fsb) {

		xfs_trim_extent(imap, imap->br_startoff,

				got.br_startoff - imap->br_startoff);

		return xfs_reflink_trim_around_shared(ip, imap, shared);

	}



	*shared = true;

	if (isnullstartblock(got.br_startblock)) {

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