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>
---
 include/linux/dax.h | 2 ++
 1 file changed, 2 insertions(+)

(limited to 'include/linux/dax.h')

diff --git a/include/linux/dax.h b/include/linux/dax.h
index ba985333e26b..2b5ecb591059 100644
--- a/include/linux/dax.h
+++ b/include/linux/dax.h
@@ -205,6 +205,8 @@ static inline void dax_unlock_mapping_entry(struct address_space *mapping,
 }
 #endif
 
+int dax_file_unshare(struct inode *inode, loff_t pos, loff_t len,
+		const struct iomap_ops *ops);
 int dax_zero_range(struct inode *inode, loff_t pos, loff_t len, bool *did_zero,
 		const struct iomap_ops *ops);
 int dax_truncate_page(struct inode *inode, loff_t pos, bool *did_zero,
-- 
cgit