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Commit e43c460d authored by Darrick J. Wong's avatar Darrick J. Wong Committed by Dave Chinner
Browse files

iomap: add a flag to report shared extents 



Signed-off-by: default avatarDarrick J. Wong <darrick.wong@oracle.com>
Reviewed-by: default avatarChristoph Hellwig <hch@lst.de>
Signed-off-by: default avatarDave Chinner <david@fromorbit.com>
parent 5f4e5752

fs/iomap.c

+2 −0
Original line number Diff line number Diff line
@@ -512,6 +512,8 @@ static int iomap_to_fiemap(struct fiemap_extent_info *fi, 


	if (iomap->flags & IOMAP_F_MERGED)

		flags |= FIEMAP_EXTENT_MERGED;

	if (iomap->flags & IOMAP_F_SHARED)

		flags |= FIEMAP_EXTENT_SHARED;



	return fiemap_fill_next_extent(fi, iomap->offset,

			iomap->blkno != IOMAP_NULL_BLOCK ? iomap->blkno << 9: 0,

include/linux/iomap.h

+1 −0
Original line number Diff line number Diff line
@@ -22,6 +22,7 @@ struct vm_fault; 
 * Flags for iomap mappings:

 */

#define IOMAP_F_MERGED	0x01	/* contains multiple blocks/extents */

#define IOMAP_F_SHARED	0x02	/* block shared with another file */



/*

 * Magic value for blkno: