[Devel] fuse: call proper fiemap_prep as it is required by new kernel api

[Alexey Kuznetsov]

Otherwise we consider locations with dirty page cache as holes.

Affects: #VSTOR-76073, #PSBM-151414, #PSBM-151424, #PSBM-151464

Signed-off-by: Alexey Kuznetsov <kuznet at acronis.com>
---
 fs/fuse/file.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/fs/fuse/file.c b/fs/fuse/file.c
index 5e23bd5..c685e01 100644
--- a/fs/fuse/file.c
+++ b/fs/fuse/file.c
@@ -3711,6 +3711,10 @@ int fuse_fiemap(struct inode *inode, struct fiemap_extent_info *fieinfo,
 
 	inode_lock(inode);
 
+	err = fiemap_prep(inode, fieinfo, start, &len, FIEMAP_FLAG_SYNC);
+	if (err)
+		goto out;
+
 	fuse_sync_writes(inode);
 	fuse_read_dio_wait(fi);
 
-- 
1.8.3.1