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1/* SPDX-License-Identifier: GPL-2.0-or-later */2/*3 * iSCSI Initiator TCP Transport4 * Copyright (C) 2004 Dmitry Yusupov5 * Copyright (C) 2004 Alex Aizman6 * Copyright (C) 2005 - 2006 Mike Christie7 * Copyright (C) 2006 Red Hat, Inc. All rights reserved.8 * maintained by open-iscsi@googlegroups.com9 *10 * See the file COPYING included with this distribution for more details.11 */12 13#ifndef ISCSI_SW_TCP_H14#define ISCSI_SW_TCP_H15 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 /* Taken when accessing the sock from the netlink/sysfs interface */32 struct mutex sock_lock;33 34 struct work_struct recvwork;35 bool queue_recv;36 37 struct iscsi_sw_tcp_send out;38 /* old values for socket callbacks */39 void (*old_data_ready)(struct sock *);40 void (*old_state_change)(struct sock *);41 void (*old_write_space)(struct sock *);42 43 /* data and header digests */44 struct ahash_request *tx_hash; /* CRC32C (Tx) */45 struct ahash_request *rx_hash; /* CRC32C (Rx) */46 47 /* MIB custom statistics */48 uint32_t sendpage_failures_cnt;49 uint32_t discontiguous_hdr_cnt;50};51 52struct iscsi_sw_tcp_host {53 struct iscsi_session *session;54};55 56struct iscsi_sw_tcp_hdrbuf {57 struct iscsi_hdr hdrbuf;58 char hdrextbuf[ISCSI_MAX_AHS_SIZE +59 ISCSI_DIGEST_SIZE];60};61 62#endif /* ISCSI_SW_TCP_H */63