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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 | ||
28 | struct socket; | |
29 | struct iscsi_tcp_conn; | |
30 | ||
31 | /* Socket connection send helper */ | |
32 | struct iscsi_sw_tcp_send { | |
33 | struct iscsi_hdr *hdr; | |
34 | struct iscsi_segment segment; | |
35 | struct iscsi_segment data_segment; | |
36 | }; | |
37 | ||
38 | struct 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 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 | ||
58 | struct iscsi_sw_tcp_host { | |
59 | struct iscsi_session *session; | |
60 | }; | |
61 | ||
62 | struct 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 */ |