iscsi_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	u32			tx_crc;	/* CRC32C (Tx) */
45	u32			rx_crc;	/* CRC32C (Rx) */
46
47	/* MIB custom statistics */
48	uint32_t		sendpage_failures_cnt;
49	uint32_t		discontiguous_hdr_cnt;
50};
51
52struct iscsi_sw_tcp_host {
53	struct iscsi_session	*session;
54};
55
56struct iscsi_sw_tcp_hdrbuf {
57	struct iscsi_hdr	hdrbuf;
58	char			hdrextbuf[ISCSI_MAX_AHS_SIZE +
59		                                  ISCSI_DIGEST_SIZE];
60};
61
62#endif /* ISCSI_SW_TCP_H */