| 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 iscsi_conn *iscsi_conn; |
| 40 | struct socket *sock; |
| 41 | |
| 42 | struct iscsi_sw_tcp_send out; |
| 43 | /* old values for socket callbacks */ |
| 44 | void (*old_data_ready)(struct sock *, int); |
| 45 | void (*old_state_change)(struct sock *); |
| 46 | void (*old_write_space)(struct sock *); |
| 47 | |
| 48 | /* data and header digests */ |
| 49 | struct hash_desc tx_hash; /* CRC32C (Tx) */ |
| 50 | struct hash_desc rx_hash; /* CRC32C (Rx) */ |
| 51 | |
| 52 | /* MIB custom statistics */ |
| 53 | uint32_t sendpage_failures_cnt; |
| 54 | uint32_t discontiguous_hdr_cnt; |
| 55 | |
| 56 | ssize_t (*sendpage)(struct socket *, struct page *, int, size_t, int); |
| 57 | }; |
| 58 | |
| 59 | struct iscsi_sw_tcp_hdrbuf { |
| 60 | struct iscsi_hdr hdrbuf; |
| 61 | char hdrextbuf[ISCSI_MAX_AHS_SIZE + |
| 62 | ISCSI_DIGEST_SIZE]; |
| 63 | }; |
| 64 | |
| 65 | #endif /* ISCSI_SW_TCP_H */ |