Adding upstream version 4.19.249.upstream/4.19.249

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 68 insertions, 0 deletions

diff --git a/drivers/scsi/iscsi_tcp.h b/drivers/scsi/iscsi_tcp.h
new file mode 100644
index 000000000..06d42d00a
--- /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 */