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
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 */
63

source code of linux/drivers/scsi/iscsi_tcp.h