v4.19.13 snapshot.
diff --git a/drivers/scsi/iscsi_tcp.h b/drivers/scsi/iscsi_tcp.h
new file mode 100644
index 0000000..06d42d0
--- /dev/null
+++ b/drivers/scsi/iscsi_tcp.h
@@ -0,0 +1,68 @@
+/*
+ * iSCSI Initiator TCP Transport
+ * Copyright (C) 2004 Dmitry Yusupov
+ * Copyright (C) 2004 Alex Aizman
+ * Copyright (C) 2005 - 2006 Mike Christie
+ * Copyright (C) 2006 Red Hat, Inc. All rights reserved.
+ * maintained by open-iscsi@googlegroups.com
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published
+ * by the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * See the file COPYING included with this distribution for more details.
+ */
+
+#ifndef ISCSI_SW_TCP_H
+#define ISCSI_SW_TCP_H
+
+#include <scsi/libiscsi.h>
+#include <scsi/libiscsi_tcp.h>
+
+struct socket;
+struct iscsi_tcp_conn;
+
+/* Socket connection send helper */
+struct iscsi_sw_tcp_send {
+ struct iscsi_hdr *hdr;
+ struct iscsi_segment segment;
+ struct iscsi_segment data_segment;
+};
+
+struct iscsi_sw_tcp_conn {
+ struct socket *sock;
+
+ struct iscsi_sw_tcp_send out;
+ /* old values for socket callbacks */
+ void (*old_data_ready)(struct sock *);
+ void (*old_state_change)(struct sock *);
+ void (*old_write_space)(struct sock *);
+
+ /* data and header digests */
+ struct ahash_request *tx_hash; /* CRC32C (Tx) */
+ struct ahash_request *rx_hash; /* CRC32C (Rx) */
+
+ /* MIB custom statistics */
+ uint32_t sendpage_failures_cnt;
+ uint32_t discontiguous_hdr_cnt;
+
+ ssize_t (*sendpage)(struct socket *, struct page *, int, size_t, int);
+};
+
+struct iscsi_sw_tcp_host {
+ struct iscsi_session *session;
+};
+
+struct iscsi_sw_tcp_hdrbuf {
+ struct iscsi_hdr hdrbuf;
+ char hdrextbuf[ISCSI_MAX_AHS_SIZE +
+ ISCSI_DIGEST_SIZE];
+};
+
+#endif /* ISCSI_SW_TCP_H */