[linux-2.6-block.git] / drivers / scsi / iscsi_tcp.h

/* 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;

	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 */
Commit	Line	Data
c942fddf	1	/* SPDX-License-Identifier: GPL-2.0-or-later */
c213ca07 AA	2	/*
	3	* iSCSI Initiator TCP Transport
	4	* Copyright (C) 2004 Dmitry Yusupov
	5	* Copyright (C) 2004 Alex Aizman
5bb0b55a MC	6	* Copyright (C) 2005 - 2006 Mike Christie
5bb0b55a MC	7	* Copyright (C) 2006 Red Hat, Inc. All rights reserved.
c213ca07 AA	8	* maintained by open-iscsi@googlegroups.com
c213ca07 AA	9	*
c213ca07 AA	10	* See the file COPYING included with this distribution for more details.
	11	*/
	12
38e1a8f5 MC	13	#ifndef ISCSI_SW_TCP_H
38e1a8f5 MC	14	#define ISCSI_SW_TCP_H
c213ca07	15
5bb0b55a	16	#include <scsi/libiscsi.h>
38e1a8f5	17	#include <scsi/libiscsi_tcp.h>
c213ca07	18
5bb0b55a	19	struct socket;
da32dd68	20	struct iscsi_tcp_conn;
da32dd68 OK	21
da32dd68 OK	22	/* Socket connection send helper */
38e1a8f5	23	struct iscsi_sw_tcp_send {
da32dd68	24	struct iscsi_hdr *hdr;
a8ac6311 OK	25	struct iscsi_segment segment;
a8ac6311 OK	26	struct iscsi_segment data_segment;
c213ca07 AA	27	};
c213ca07 AA	28
38e1a8f5	29	struct iscsi_sw_tcp_conn {
5bb0b55a	30	struct socket *sock;
c213ca07	31
38e1a8f5	32	struct iscsi_sw_tcp_send out;
c213ca07	33	/* old values for socket callbacks */
676d2369	34	void (old_data_ready)(struct sock );
c213ca07 AA	35	void (old_state_change)(struct sock );
	36	void (old_write_space)(struct sock );
	37
dd8c0d95	38	/* data and header digests */
5d6ac29b HX	39	struct ahash_request tx_hash; / CRC32C (Tx) */
5d6ac29b HX	40	struct ahash_request rx_hash; / CRC32C (Rx) */
c213ca07	41
5bb0b55a	42	/* MIB custom statistics */
c213ca07 AA	43	uint32_t sendpage_failures_cnt;
c213ca07 AA	44	uint32_t discontiguous_hdr_cnt;
56851698	45
a8ac6311	46	ssize_t (sendpage)(struct socket , struct page *, int, size_t, int);
c213ca07 AA	47	};
c213ca07 AA	48
a79af8a6 MC	49	struct iscsi_sw_tcp_host {
	50	struct iscsi_session *session;
	51	};
	52
38e1a8f5 MC	53	struct iscsi_sw_tcp_hdrbuf {
	54	struct iscsi_hdr hdrbuf;
	55	char hdrextbuf[ISCSI_MAX_AHS_SIZE +
004d6530	56	ISCSI_DIGEST_SIZE];
c213ca07 AA	57	};
c213ca07 AA	58
38e1a8f5	59	#endif /* ISCSI_SW_TCP_H */