From mboxrd@z Thu Jan 1 00:00:00 1970 From: "Darrick J. Wong" Subject: [PATCH 6/6] iomap: add a flag to report shared extents Date: Thu, 25 Aug 2016 16:31:20 -0700 Message-ID: <147216788009.525.789325200721590680.stgit@birch.djwong.org> References: <147216784041.525.7722906502172299465.stgit@birch.djwong.org> Mime-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <147216784041.525.7722906502172299465.stgit-PTl6brltDGh4DFYR7WNSRA@public.gmane.org> Sender: linux-api-owner-u79uwXL29TY76Z2rM5mHXA@public.gmane.org To: david-FqsqvQoI3Ljby3iVrkZq2A@public.gmane.org, viro-3bDd1+5oDREiFSDQTTA3OLVCufUGDwFn@public.gmane.org, darrick.wong-QHcLZuEGTsvQT0dZR+AlfA@public.gmane.org Cc: linux-xfs-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, linux-fsdevel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, linux-api-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, xfs-VZNHf3L845pBDgjK7y7TUQ@public.gmane.org List-Id: linux-api@vger.kernel.org Signed-off-by: Darrick J. Wong --- fs/iomap.c | 2 ++ include/linux/iomap.h | 1 + 2 files changed, 3 insertions(+) diff --git a/fs/iomap.c b/fs/iomap.c index e9b3f99..ec411a6 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 3a56212..c74226a 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: