CIFS: Reconnect durable handles for SMB2

On reconnects, we need to reopen file and then obtain all byte-range
locks held by the client. SMB2 protocol provides feature to make
this process atomic by reconnecting to the same file handle
with all it's byte-range locks. This patch adds this capability
for SMB2 shares.

Signed-off-by: Pavel Shilovsky <pshilovsky@samba.org>
Signed-off-by: Steven French <steven@steven-GA-970A-DS3.(none)>

fs/cifs/dir.c

@@ -327,6 +327,7 @@ cifs_do_create(struct inode *inode, struct dentry *direntry, unsigned int xid,
 	oparms.disposition = disposition;
 	oparms.path = full_path;
 	oparms.fid = fid;
+	oparms.reconnect = false;
 
 	rc = server->ops->open(xid, &oparms, oplock, buf);
 	if (rc) {