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
19 struct socket;
20 struct iscsi_tcp_conn;
21
22 /* Socket connection send helper */
23 struct iscsi_sw_tcp_send {
24 struct iscsi_hdr *hdr;
25 struct iscsi_segment segment;
26 struct iscsi_segment data_segment;
27 };
28
29 struct iscsi_sw_tcp_conn {
30 struct socket *sock;
31
32 struct iscsi_sw_tcp_send out;
33 /* old values for socket callbacks */
34 void (*old_data_ready)(struct sock *);
35 void (*old_state_change)(struct sock *);
36 void (*old_write_space)(struct sock *);
37
38 /* data and header digests */
39 struct ahash_request *tx_hash; /* CRC32C (Tx) */
40 struct ahash_request *rx_hash; /* CRC32C (Rx) */
41
42 /* MIB custom statistics */
43 uint32_t sendpage_failures_cnt;
44 uint32_t discontiguous_hdr_cnt;
45
46 ssize_t (*sendpage)(struct socket *, struct page *, int, size_t, int);
47 };
48
49 struct iscsi_sw_tcp_host {
50 struct iscsi_session *session;
51 };
52
53 struct iscsi_sw_tcp_hdrbuf {
54 struct iscsi_hdr hdrbuf;
55 char hdrextbuf[ISCSI_MAX_AHS_SIZE +
56 ISCSI_DIGEST_SIZE];
57 };
58
59 #endif /* ISCSI_SW_TCP_H */