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 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 49struct iscsi_sw_tcp_host { 50 struct iscsi_session *session; 51}; 52 53struct 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 */ 60