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freebsd
GitHub Repository: freebsd/freebsd-src
 Path: blob/main/sys/cam/ctl/ctl_frontend_iscsi.h
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/*-

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 * SPDX-License-Identifier: BSD-2-Clause

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 *

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 * Copyright (c) 2012 The FreeBSD Foundation

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 *

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 * This software was developed by Edward Tomasz Napierala under sponsorship

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 * from the FreeBSD Foundation.

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 *

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 * Redistribution and use in source and binary forms, with or without

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 * modification, are permitted provided that the following conditions

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 * are met:

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 * 1. Redistributions of source code must retain the above copyright

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 *    notice, this list of conditions and the following disclaimer.

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 * 2. Redistributions in binary form must reproduce the above copyright

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 *    notice, this list of conditions and the following disclaimer in the

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 *    documentation and/or other materials provided with the distribution.

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 *

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 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND

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 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE

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 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE

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 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE

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 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL

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 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS

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 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)

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 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT

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 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY

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 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF

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 * SUCH DAMAGE.

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 */

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#ifndef CTL_FRONTEND_ISCSI_H

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#define	CTL_FRONTEND_ISCSI_H

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#define CFISCSI_TARGET_STATE_INVALID	0

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#define CFISCSI_TARGET_STATE_ACTIVE	1

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#define CFISCSI_TARGET_STATE_DYING	2

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struct cfiscsi_target {

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	TAILQ_ENTRY(cfiscsi_target)	ct_next;

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	struct cfiscsi_softc		*ct_softc;

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	volatile u_int			ct_refcount;

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	char				ct_name[CTL_ISCSI_NAME_LEN];

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	char				ct_alias[CTL_ISCSI_ALIAS_LEN];

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	uint16_t			ct_tag;

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	int				ct_state;

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	int				ct_online;

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	int				ct_target_id;

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	struct ctl_port			ct_port;

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};

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struct cfiscsi_data_wait {

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	TAILQ_ENTRY(cfiscsi_data_wait)	cdw_next;

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	union ctl_io			*cdw_ctl_io;

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	uint32_t			cdw_target_transfer_tag;

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	uint32_t			cdw_initiator_task_tag;

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	int				cdw_sg_index;

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	char				*cdw_sg_addr;

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	size_t				cdw_sg_len;

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	uint32_t			cdw_r2t_end;

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	uint32_t			cdw_datasn;

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	void				*cdw_icl_prv;

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};

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#define CFISCSI_SESSION_STATE_INVALID		0

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#define CFISCSI_SESSION_STATE_BHS		1

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#define CFISCSI_SESSION_STATE_AHS		2

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#define CFISCSI_SESSION_STATE_HEADER_DIGEST	3

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#define CFISCSI_SESSION_STATE_DATA		4

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#define CFISCSI_SESSION_STATE_DATA_DIGEST	5

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struct cfiscsi_session {

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	TAILQ_ENTRY(cfiscsi_session)	cs_next;

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	struct mtx			cs_lock;

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	struct icl_conn			*cs_conn;

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	uint32_t			cs_cmdsn;

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	uint32_t			cs_statsn;

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	uint32_t			cs_target_transfer_tag;

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	volatile u_int			cs_outstanding_ctl_pdus;

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	TAILQ_HEAD(, cfiscsi_data_wait)	cs_waiting_for_data_out;

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	struct cfiscsi_target		*cs_target;

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	struct callout			cs_callout;

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	int				cs_timeout;

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	struct cv			cs_maintenance_cv;

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	bool				cs_terminating;

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	bool				cs_terminating_tasks;

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	bool				cs_handoff_in_progress;

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	bool				cs_tasks_aborted;

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	int				cs_max_burst_length;

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	int				cs_first_burst_length;

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	bool				cs_immediate_data;

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	char				cs_initiator_name[CTL_ISCSI_NAME_LEN];

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	char				cs_initiator_addr[CTL_ISCSI_ADDR_LEN];

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	char				cs_initiator_alias[CTL_ISCSI_ALIAS_LEN];

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	char				cs_initiator_isid[6];

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	char				cs_initiator_id[CTL_ISCSI_NAME_LEN + 5 + 6 + 1];

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	unsigned int			cs_id;

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	int				cs_ctl_initid;

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#ifdef ICL_KERNEL_PROXY

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	struct sockaddr			*cs_initiator_sa;

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	int				cs_portal_id;

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	bool				cs_login_phase;

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	bool				cs_waiting_for_ctld;

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	struct cv			cs_login_cv;

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	struct icl_pdu			*cs_login_pdu;

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#endif

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};

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#ifdef ICL_KERNEL_PROXY

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struct icl_listen;

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#endif

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struct cfiscsi_softc {

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	struct mtx			lock;

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	char				port_name[32];

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	int				online;

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	int				last_target_id;

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	unsigned int			last_session_id;

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	TAILQ_HEAD(, cfiscsi_target)	targets;

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	TAILQ_HEAD(, cfiscsi_session)	sessions;

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	struct cv			sessions_cv;

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#ifdef ICL_KERNEL_PROXY

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	struct icl_listen		*listener;

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	struct cv			accept_cv;

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#endif

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};

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#endif /* !CTL_FRONTEND_ISCSI_H */

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