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/* SPDX-License-Identifier: GPL-2.0-or-later */
/*
* iSCSI Initiator TCP Transport
* Copyright (C) 2004 Dmitry Yusupov
* Copyright (C) 2004 Alex Aizman
* Copyright (C) 2005 - 2006 Mike Christie
* Copyright (C) 2006 Red Hat, Inc. All rights reserved.
* maintained by open-iscsi@googlegroups.com
*
* See the file COPYING included with this distribution for more details.
*/
#ifndef ISCSI_SW_TCP_H
#define ISCSI_SW_TCP_H
#include <scsi/libiscsi.h>
#include <scsi/libiscsi_tcp.h>
struct socket;
struct iscsi_tcp_conn;
/* Socket connection send helper */
struct iscsi_sw_tcp_send {
struct iscsi_hdr *hdr;
struct iscsi_segment segment;
struct iscsi_segment data_segment;
};
struct iscsi_sw_tcp_conn {
struct socket *sock;
/* Taken when accessing the sock from the netlink/sysfs interface */
struct mutex sock_lock;
struct work_struct recvwork;
bool queue_recv;
struct iscsi_sw_tcp_send out;
/* old values for socket callbacks */
void (*old_data_ready)(struct sock *);
void (*old_state_change)(struct sock *);
void (*old_write_space)(struct sock *);
/* data and header digests */
struct ahash_request *tx_hash; /* CRC32C (Tx) */
struct ahash_request *rx_hash; /* CRC32C (Rx) */
/* MIB custom statistics */
uint32_t sendpage_failures_cnt;
uint32_t discontiguous_hdr_cnt;
ssize_t (*sendpage)(struct socket *, struct page *, int, size_t, int);
};
struct iscsi_sw_tcp_host {
struct iscsi_session *session;
};
struct iscsi_sw_tcp_hdrbuf {
struct iscsi_hdr hdrbuf;
char hdrextbuf[ISCSI_MAX_AHS_SIZE +
ISCSI_DIGEST_SIZE];
};
#endif /* ISCSI_SW_TCP_H */
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