From: Darrick J. Wong Date: Mon, 19 Sep 2016 00:13:02 +0000 (+1000) Subject: iomap: add a flag to report shared extents X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=e43c460dcd265431df7a5e481450ad9c0596c10c;p=linux-beck.git iomap: add a flag to report shared extents Signed-off-by: Darrick J. Wong Reviewed-by: Christoph Hellwig Signed-off-by: Dave Chinner --- 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: