1/*
 2 * iSCSI Initiator TCP Transport
 3 * Copyright (C) 2004 Dmitry Yusupov
 4 * Copyright (C) 2004 Alex Aizman
 5 * Copyright (C) 2005 - 2006 Mike Christie
 6 * Copyright (C) 2006 Red Hat, Inc.  All rights reserved.
 7 * maintained by open-iscsi@googlegroups.com
 8 *
 9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License as published
11 * by the Free Software Foundation; either version 2 of the License, or
12 * (at your option) any later version.
13 *
14 * This program is distributed in the hope that it will be useful, but
15 * WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
17 * General Public License for more details.
18 *
19 * See the file COPYING included with this distribution for more details.
20 */
21
22#ifndef ISCSI_SW_TCP_H
23#define ISCSI_SW_TCP_H
24
25#include <scsi/libiscsi.h>
26#include <scsi/libiscsi_tcp.h>
27
28struct socket;
29struct iscsi_tcp_conn;
30
31/* Socket connection send helper */
32struct iscsi_sw_tcp_send {
33	struct iscsi_hdr	*hdr;
34	struct iscsi_segment	segment;
35	struct iscsi_segment	data_segment;
36};
37
38struct iscsi_sw_tcp_conn {
39	struct socket		*sock;
 
 
 
 
 
40
41	struct iscsi_sw_tcp_send out;
42	/* old values for socket callbacks */
43	void			(*old_data_ready)(struct sock *, int);
44	void			(*old_state_change)(struct sock *);
45	void			(*old_write_space)(struct sock *);
46
47	/* data and header digests */
48	struct hash_desc	tx_hash;	/* CRC32C (Tx) */
49	struct hash_desc	rx_hash;	/* CRC32C (Rx) */
50
51	/* MIB custom statistics */
52	uint32_t		sendpage_failures_cnt;
53	uint32_t		discontiguous_hdr_cnt;
54
55	ssize_t (*sendpage)(struct socket *, struct page *, int, size_t, int);
56};
57
58struct iscsi_sw_tcp_host {
59	struct iscsi_session	*session;
60};
61
62struct iscsi_sw_tcp_hdrbuf {
63	struct iscsi_hdr	hdrbuf;
64	char			hdrextbuf[ISCSI_MAX_AHS_SIZE +
65		                                  ISCSI_DIGEST_SIZE];
66};
67
68#endif /* ISCSI_SW_TCP_H */

 1/* SPDX-License-Identifier: GPL-2.0-or-later */
 2/*
 3 * iSCSI Initiator TCP Transport
 4 * Copyright (C) 2004 Dmitry Yusupov
 5 * Copyright (C) 2004 Alex Aizman
 6 * Copyright (C) 2005 - 2006 Mike Christie
 7 * Copyright (C) 2006 Red Hat, Inc.  All rights reserved.
 8 * maintained by open-iscsi@googlegroups.com
 9 *
 
 
 
 
 
 
 
 
 
 
10 * See the file COPYING included with this distribution for more details.
11 */
12
13#ifndef ISCSI_SW_TCP_H
14#define ISCSI_SW_TCP_H
15
16#include <scsi/libiscsi.h>
17#include <scsi/libiscsi_tcp.h>
18
19struct socket;
20struct iscsi_tcp_conn;
21
22/* Socket connection send helper */
23struct iscsi_sw_tcp_send {
24	struct iscsi_hdr	*hdr;
25	struct iscsi_segment	segment;
26	struct iscsi_segment	data_segment;
27};
28
29struct iscsi_sw_tcp_conn {
30	struct socket		*sock;
31	/* Taken when accessing the sock from the netlink/sysfs interface */
32	struct mutex		sock_lock;
33
34	struct work_struct	recvwork;
35	bool			queue_recv;
36
37	struct iscsi_sw_tcp_send out;
38	/* old values for socket callbacks */
39	void			(*old_data_ready)(struct sock *);
40	void			(*old_state_change)(struct sock *);
41	void			(*old_write_space)(struct sock *);
42
43	/* data and header digests */
44	struct ahash_request	*tx_hash;	/* CRC32C (Tx) */
45	struct ahash_request	*rx_hash;	/* CRC32C (Rx) */
46
47	/* MIB custom statistics */
48	uint32_t		sendpage_failures_cnt;
49	uint32_t		discontiguous_hdr_cnt;
50
51	ssize_t (*sendpage)(struct socket *, struct page *, int, size_t, int);
52};
53
54struct iscsi_sw_tcp_host {
55	struct iscsi_session	*session;
56};
57
58struct iscsi_sw_tcp_hdrbuf {
59	struct iscsi_hdr	hdrbuf;
60	char			hdrextbuf[ISCSI_MAX_AHS_SIZE +
61		                                  ISCSI_DIGEST_SIZE];
62};
63
64#endif /* ISCSI_SW_TCP_H */