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Commit d531d91d authored by Christoph Hellwig's avatar Christoph Hellwig Committed by Dave Chinner
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xfs: always use unwritten extents for direct I/O writes 



To allow aio writes beyond i_size we need to create unwritten extents for
newly allocated blocks, similar to how we already do inside i_size.

Instead of adding another special case we now use unwritten extents
unconditionally.  This also marks the end of directly allocation data
extents in all of XFS - we now always use either delalloc or unwritten
extents.

Signed-off-by: default avatarChristoph Hellwig <hch@lst.de>
Reviewed-by: default avatarDave Chinner <dchinner@redhat.com>
Signed-off-by: default avatarDave Chinner <david@fromorbit.com>
parent 60392573

fs/xfs/xfs_iomap.c

+3 −7
Original line number Diff line number Diff line
@@ -128,7 +128,6 @@ xfs_iomap_write_direct( 
	xfs_fsblock_t	firstfsb;

	xfs_extlen_t	extsz, temp;

	int		nimaps;

	int		bmapi_flag;

	int		quota_flag;

	int		rt;

	xfs_trans_t	*tp;
@@ -200,18 +199,15 @@ xfs_iomap_write_direct( 


	xfs_trans_ijoin(tp, ip, 0);



	bmapi_flag = 0;

	if (offset < XFS_ISIZE(ip) || extsz)

		bmapi_flag |= XFS_BMAPI_PREALLOC;



	/*

	 * From this point onwards we overwrite the imap pointer that the

	 * caller gave to us.

	 */

	xfs_bmap_init(&free_list, &firstfsb);

	nimaps = 1;

	error = xfs_bmapi_write(tp, ip, offset_fsb, count_fsb, bmapi_flag,

				&firstfsb, 0, imap, &nimaps, &free_list);

	error = xfs_bmapi_write(tp, ip, offset_fsb, count_fsb,

				XFS_BMAPI_PREALLOC, &firstfsb, 0,

				imap, &nimaps, &free_list);

	if (error)

		goto out_bmap_cancel;