From d984648e428bf88cbd94ebe346c73632cb92fffb Mon Sep 17 00:00:00 2001
From: Shiyang Ruan <ruansy.fnst@fujitsu.com>
Date: Thu, 1 Dec 2022 15:32:33 +0000
Subject: fsdax,xfs: port unshare to fsdax

Implement unshare in fsdax mode: copy data from srcmap to iomap.

Link: https://lkml.kernel.org/r/1669908753-169-1-git-send-email-ruansy.fnst@fujitsu.com
Signed-off-by: Shiyang Ruan <ruansy.fnst@fujitsu.com>
Reviewed-by: Darrick J. Wong <djwong@kernel.org>
Cc: Alistair Popple <apopple@nvidia.com>
Cc: Dan Williams <dan.j.williams@intel.com>
Cc: Dave Chinner <david@fromorbit.com>
Cc: Jason Gunthorpe <jgg@nvidia.com>
Cc: John Hubbard <jhubbard@nvidia.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---
 fs/xfs/xfs_reflink.c | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

(limited to 'fs/xfs')

diff --git a/fs/xfs/xfs_reflink.c b/fs/xfs/xfs_reflink.c
index 93bdd25680bc..fe46bce8cae6 100644
--- a/fs/xfs/xfs_reflink.c
+++ b/fs/xfs/xfs_reflink.c
@@ -1693,8 +1693,12 @@ xfs_reflink_unshare(
 
 	inode_dio_wait(inode);
 
-	error = iomap_file_unshare(inode, offset, len,
-			&xfs_buffered_write_iomap_ops);
+	if (IS_DAX(inode))
+		error = dax_file_unshare(inode, offset, len,
+				&xfs_dax_write_iomap_ops);
+	else
+		error = iomap_file_unshare(inode, offset, len,
+				&xfs_buffered_write_iomap_ops);
 	if (error)
 		goto out;
 
-- 
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