/*-
 * SPDX-License-Identifier: BSD-2-Clause
 *
 * Copyright (c) 2012 The FreeBSD Foundation
 *
 * This software was developed by Edward Tomasz Napierala under sponsorship
 * from the FreeBSD Foundation.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 */

#ifndef CTL_FRONTEND_ISCSI_H
#define CTL_FRONTEND_ISCSI_H

#define CFISCSI_TARGET_STATE_INVALID    0
#define CFISCSI_TARGET_STATE_ACTIVE     1
#define CFISCSI_TARGET_STATE_DYING      2

struct cfiscsi_target {
        TAILQ_ENTRY(cfiscsi_target)     ct_next;
        struct cfiscsi_softc            *ct_softc;
        volatile u_int                  ct_refcount;
        char                            ct_name[CTL_ISCSI_NAME_LEN];
        char                            ct_alias[CTL_ISCSI_ALIAS_LEN];
        uint16_t                        ct_tag;
        int                             ct_state;
        int                             ct_online;
        int                             ct_target_id;
        struct ctl_port                 ct_port;
};

struct cfiscsi_data_wait {
        TAILQ_ENTRY(cfiscsi_data_wait)  cdw_next;
        union ctl_io                    *cdw_ctl_io;
        uint32_t                        cdw_target_transfer_tag;
        uint32_t                        cdw_initiator_task_tag;
        int                             cdw_sg_index;
        char                            *cdw_sg_addr;
        size_t                          cdw_sg_len;
        uint32_t                        cdw_r2t_end;
        uint32_t                        cdw_datasn;
        void                            *cdw_icl_prv;
};

#define CFISCSI_SESSION_STATE_INVALID           0
#define CFISCSI_SESSION_STATE_BHS               1
#define CFISCSI_SESSION_STATE_AHS               2
#define CFISCSI_SESSION_STATE_HEADER_DIGEST     3
#define CFISCSI_SESSION_STATE_DATA              4
#define CFISCSI_SESSION_STATE_DATA_DIGEST       5

struct cfiscsi_session {
        TAILQ_ENTRY(cfiscsi_session)    cs_next;
        struct mtx                      cs_lock;
        struct icl_conn                 *cs_conn;
        uint32_t                        cs_cmdsn;
        uint32_t                        cs_statsn;
        uint32_t                        cs_target_transfer_tag;
        volatile u_int                  cs_outstanding_ctl_pdus;
        TAILQ_HEAD(, cfiscsi_data_wait) cs_waiting_for_data_out;
        struct cfiscsi_target           *cs_target;
        struct callout                  cs_callout;
        int                             cs_timeout;
        struct cv                       cs_maintenance_cv;
        bool                            cs_terminating;
        bool                            cs_terminating_tasks;
        bool                            cs_handoff_in_progress;
        bool                            cs_tasks_aborted;
        int                             cs_max_burst_length;
        int                             cs_first_burst_length;
        bool                            cs_immediate_data;
        char                            cs_initiator_name[CTL_ISCSI_NAME_LEN];
        char                            cs_initiator_addr[CTL_ISCSI_ADDR_LEN];
        char                            cs_initiator_alias[CTL_ISCSI_ALIAS_LEN];
        char                            cs_initiator_isid[6];
        char                            cs_initiator_id[CTL_ISCSI_NAME_LEN + 5 + 6 + 1];
        unsigned int                    cs_id;
        int                             cs_ctl_initid;
#ifdef ICL_KERNEL_PROXY
        struct sockaddr                 *cs_initiator_sa;
        int                             cs_portal_id;
        bool                            cs_login_phase;
        bool                            cs_waiting_for_ctld;
        struct cv                       cs_login_cv;
        struct icl_pdu                  *cs_login_pdu;
#endif
};

#ifdef ICL_KERNEL_PROXY
struct icl_listen;
#endif

struct cfiscsi_softc {
        struct mtx                      lock;
        char                            port_name[32];
        int                             online;
        int                             last_target_id;
        unsigned int                    last_session_id;
        TAILQ_HEAD(, cfiscsi_target)    targets;
        TAILQ_HEAD(, cfiscsi_session)   sessions;
        struct cv                       sessions_cv;
#ifdef ICL_KERNEL_PROXY
        struct icl_listen               *listener;
        struct cv                       accept_cv;
#endif
};

#endif /* !CTL_FRONTEND_ISCSI_H */