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 *);
44 void (*old_state_change)(struct sock *);
45 void (*old_write_space)(struct sock *);
46
47 /* data and header digests */
48 struct ahash_request *tx_hash; /* CRC32C (Tx) */
49 struct ahash_request *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 */
69