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| author | Darrick J. Wong <darrick.wong@oracle.com> | 2016-09-19 10:13:02 +1000 |
|---|---|---|
| committer | Dave Chinner <david@fromorbit.com> | 2016-09-19 10:13:02 +1000 |
| commit | e43c460dcd265431df7a5e481450ad9c0596c10c (patch) | |
| tree | 2b68863bf6d156f977c9e48e5bb2b56883139922 | |
| parent | 5f4e5752a8a3a72c79514def2ad9fc7cd410ce2e (diff) | |
| download | linux-e43c460dcd265431df7a5e481450ad9c0596c10c.tar.gz linux-e43c460dcd265431df7a5e481450ad9c0596c10c.tar.xz | |
iomap: add a flag to report shared extents
Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Dave Chinner <david@fromorbit.com>
| -rw-r--r-- | fs/iomap.c | 2 | ||||
| -rw-r--r-- | include/linux/iomap.h | 1 |
2 files changed, 3 insertions, 0 deletions
diff --git a/fs/iomap.c b/fs/iomap.c index e9b3f991c2d8..ec411a6b9edc 100644 --- a/fs/iomap.c +++ b/fs/iomap.c @@ -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, diff --git a/include/linux/iomap.h b/include/linux/iomap.h index 3a56212a0a8d..c74226a738a3 100644 --- a/include/linux/iomap.h +++ b/include/linux/iomap.h @@ -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: |