port/iscsit/iscsit.h

	iscsit.h revision 4558d122136f151d62acbbc02ddb42df89a5ef66
/*
 * CDDL HEADER START
 *
 * The contents of this file are subject to the terms of the
 * Common Development and Distribution License (the "License").
 * You may not use this file except in compliance with the License.
 *
 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
 * or http://www.opensolaris.org/os/licensing.
 * See the License for the specific language governing permissions
 * and limitations under the License.
 *
 * When distributing Covered Code, include this CDDL HEADER in each
 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
 * If applicable, add the following below this CDDL HEADER, with the
 * fields enclosed by brackets "[]" replaced with your own identifying
 * information: Portions Copyright [yyyy] [name of copyright owner]
 *
 * CDDL HEADER END
 */
/*
 * Copyright (c) 2008, 2010, Oracle and/or its affiliates. All rights reserved.
 */
#ifndef _ISCSIT_H_
#define _ISCSIT_H_

#include <sys/iscsit/iscsi_if.h>
#include <sys/iscsit/iscsit_common.h>

#include "iscsit_authclient.h"

/*
 * For some reason iscsi_protocol.h lists the max version as "0x02" and the
 * min version as "0x00".  RFC3720 clearly states that the current version
 * number is 0x00 so that is what we will use.
 */
#define ISCSIT_MIN_VERSION          0x00
#define ISCSIT_MAX_VERSION          0x00
#define ISCSIT_MAX_CONNECTIONS          32 /* MC/S support  */
#define ISCSIT_MAX_RECV_DATA_SEGMENT_LENGTH (32*1024)
#define ISCSIT_MAX_BURST_LENGTH         (512*1024)
#define ISCSIT_MAX_FIRST_BURST_LENGTH       ISCSI_DEFAULT_FIRST_BURST_LENGTH
#define ISCSIT_MAX_TIME2WAIT            ISCSI_DEFAULT_TIME_TO_WAIT
#define ISCSIT_MAX_TIME2RETAIN          ISCSI_DEFAULT_TIME_TO_RETAIN
#define ISCSIT_MAX_OUTSTANDING_R2T      ISCSI_DEFAULT_MAX_OUT_R2T
#define ISCSIT_MAX_ERROR_RECOVERY_LEVEL     0
#define ISCSIT_MAX_OUTSTANDING_UNEXPECTED_PDUS  0

#define ISCSIT_DEFAULT_TPG  "iscsit-default-tpg"
#define ISCSIT_DEFAULT_TPGT 1

#define ISCSI_MAX_TSIH      0xffff
#define ISCSI_UNSPEC_TSIH   0

/* Max targets per system */
#define ISCSIT_MAX_TARGETS  1024

#define ISCSIT_MAX_WINDOW   1024
#define ISCSIT_RXPDU_QUEUE_LEN  2048

#define ISCSIT_CMDSN_LT_EXPCMDSN    -1
#define ISCSIT_CMDSN_EQ_EXPCMDSN    1
#define ISCSIT_CMDSN_GT_EXPCMDSN    0
/*
 * MC/S: A timeout is maintained to recover from lost CmdSN (holes in the
 * CmdSN ordering). When the timeout is reached, the ExpCmdSN is advanced
 * past the hole to continue processing the queued commands. This value is
 * system-tunable (volatile rxpdu_queue_threshold) and should be in the
 * range from 5 to 30 seconds.
 */
#define ISCSIT_RXPDU_QUEUE_THRESHOLD        5   /* 5 seconds */
#define ISCSIT_RXPDU_QUEUE_MONITOR_INTERVAL 5   /* 5 seconds */

/* Time in seconds to wait between calls to stmf_deregister_local_port */
#define TGT_DEREG_RETRY_SECONDS 1

#define ISCSIT_GLOBAL_LOCK(rw) rw_enter(&iscsit_global.global_rwlock, (rw))
#define ISCSIT_GLOBAL_UNLOCK() rw_exit(&iscsit_global.global_rwlock)

/* Circular buffer to hold the out-of-order PDUs in MC/S */
typedef struct {
    idm_pdu_t   *cb_buffer[ISCSIT_RXPDU_QUEUE_LEN];
    int     cb_num_elems;
} iscsit_cbuf_t;

/*
 * Used for serial number arithmetic (RFC 1982)
 */
#define ISCSIT_SNA32_CHECK  0x80000000

typedef struct {
    char        tpg_name[MAX_TPG_NAMELEN];
    kmutex_t    tpg_mutex;
    idm_refcnt_t    tpg_refcnt;
    int     tpg_online;
    avl_tree_t  tpg_portal_list;
    avl_node_t  tpg_global_ln;
    list_node_t tpg_delete_ln;
} iscsit_tpg_t;

#define IS_DEFAULT_TPGT(TPGT) \
    (((TPGT) != NULL) && \
        ((TPGT)->tpgt_tpg == iscsit_global.global_default_tpg))

typedef struct {
    iscsit_tpg_t    *tpgt_tpg;
    idm_refcnt_t    tpgt_refcnt;
    avl_node_t  tpgt_tgt_ln;
    list_node_t tpgt_delete_ln;
    uint16_t    tpgt_tag;
    boolean_t   tpgt_needs_tpg_offline;
} iscsit_tpgt_t;

typedef struct {
    struct sockaddr_storage portal_addr;
    int         portal_online;
    idm_refcnt_t        portal_refcnt;
    avl_node_t      portal_tpg_ln;
    iscsit_tpg_t        *portal_tpg;
    idm_svc_t       *portal_svc;
    boolean_t       portal_default;
    void            *portal_isns;
} iscsit_portal_t;


/* Target states and events, update iscsit_ts_name table whenever modified */
typedef enum {
    TS_UNDEFINED = 0,
    TS_CREATED,
    TS_ONLINING,
    TS_ONLINE,
    TS_STMF_ONLINE,
    TS_DELETING_NEED_OFFLINE,
    TS_OFFLINING,
    TS_OFFLINE,
    TS_STMF_OFFLINE,
    TS_DELETING_STMF_DEREG,
    TS_DELETING_STMF_DEREG_FAIL,
    TS_DELETING,
    TS_MAX_STATE
} iscsit_tgt_state_t;

#ifdef ISCSIT_TGT_SM_STRINGS
static const char *iscsit_ts_name[TS_MAX_STATE+1] = {
    "TS_UNDEFINED",
    "TS_CREATED",
    "TS_ONLINING",
    "TS_ONLINE",
    "TS_STMF_ONLINE",
    "TS_DELETING_NEED_OFFLINE",
    "TS_OFFLINING",
    "TS_OFFLINE",
    "TS_STMF_OFFLINE",
    "TS_DELETING_STMF_DEREG",
    "TS_DELETING_STMF_DEREG_FAIL",
    "TS_DELETING",
    "TS_MAX_STATE"
};
#endif

typedef enum {
    TE_UNDEFINED = 0,
    TE_STMF_ONLINE_REQ,
    TE_ONLINE_SUCCESS,
    TE_ONLINE_FAIL,
    TE_STMF_ONLINE_COMPLETE_ACK,
    TE_STMF_OFFLINE_REQ,
    TE_OFFLINE_COMPLETE,
    TE_STMF_OFFLINE_COMPLETE_ACK,
    TE_DELETE,
    TE_STMF_DEREG_SUCCESS,
    TE_STMF_DEREG_FAIL,
    TE_STMF_DEREG_RETRY,
    TE_WAIT_REF_COMPLETE,
    TE_MAX_EVENT
} iscsit_tgt_event_t;

#ifdef ISCSIT_TGT_SM_STRINGS
static const char *iscsit_te_name[TE_MAX_EVENT+1] = {
    "TE_UNDEFINED",
    "TE_STMF_ONLINE_REQ",
    "TE_ONLINE_SUCCESS",
    "TE_ONLINE_FAIL",
    "TE_STMF_ONLINE_COMPLETE_ACK",
    "TE_STMF_OFFLINE_REQ",
    "TE_OFFLINE_COMPLETE",
    "TE_STMF_OFFLINE_COMPLETE_ACK",
    "TE_DELETE",
    "TE_STMF_DEREG_SUCCESS",
    "TE_STMF_DEREG_FAIL",
    "TE_STMF_DEREG_RETRY",
    "TE_WAIT_REF_COMPLETE",
    "TE_MAX_EVENT"
};
#endif

typedef struct {
    char            *target_name;
    nvlist_t        *target_props;
    kmutex_t        target_mutex;
    idm_refcnt_t        target_refcnt;
    idm_refcnt_t        target_sess_refcnt;
    avl_tree_t      target_tpgt_list;
    avl_tree_t      target_sess_list;
    avl_node_t      target_global_ln;
    avl_node_t      target_global_deleted_ln;
    /* STMF lport == iSCSI target */
    scsi_devid_desc_t   *target_devid;
    stmf_local_port_t   *target_stmf_lport;
    uint8_t         target_stmf_lport_registered;

    /* Target state */
    boolean_t       target_sm_busy;
    boolean_t       target_deleting;
    iscsit_tgt_state_t  target_state;
    iscsit_tgt_state_t  target_last_state;
    sm_audit_buf_t      target_state_audit;
    list_t          target_events;
    uint64_t        target_generation;
} iscsit_tgt_t;

typedef struct {
    char            ini_name[MAX_ISCSI_NODENAMELEN];
    nvlist_t        *ini_props;
    avl_node_t      ini_global_ln;
} iscsit_ini_t;

/*
 * iSCSI Auth Information
 */
typedef struct conn_auth {
    char            ca_tgt_chapuser[iscsitAuthStringMaxLength];
    uint8_t         ca_tgt_chapsecret[iscsitAuthStringMaxLength];
    int         ca_tgt_chapsecretlen;

    char            ca_ini_chapuser[iscsitAuthStringMaxLength];
    uint8_t         ca_ini_chapsecret[iscsitAuthStringMaxLength];
    int         ca_ini_chapsecretlen;

    /* RADIUS authentication information    */
    boolean_t       ca_use_radius;
    struct sockaddr_storage ca_radius_server;
    uint8_t         ca_radius_secret[iscsitAuthStringMaxLength];
    int         ca_radius_secretlen;

    /* authentication method list */
    iscsit_auth_method_t    ca_method_valid_list[iscsitAuthMethodMaxCount];

    /* Target alias */
    char            ca_tgt_alias[MAX_ISCSI_NODENAMELEN];
} conn_auth_t;

/*
 * We have three state machines (so far) between the IDM connection state
 * machine, the session state machine, and the login state machine.  All
 * of these states have some concept of "full feature mode".  It's going
 * to be obnoxious if we use a mixture of these "ffp" representations
 * since it will be difficult to ensure the three state machines
 * transition at exactly the same time.  We should drive decisions that
 * depend on FFP from the IDM state machine which is actually snooping
 * the iSCSI PDU's and will always transition at the correct time.
 *
 * A consequence of this approach is that there is a window just after
 * login completes where we may get a SCSI request but the session
 * or login state machine has not quite transitioned to "FFP".  Whether
 * this is a problem depends on how we use those state machines.  This
 * is what we should use them for:
 *
 * IDM Connection state machine - Decisions related to command processing
 * including whether a connection is in FFP
 *
 * Session state machine - Summarize the state of all available connections
 * for the purposes of ERL1, ERL2 and MC/S.  A session in LOGGED_IN state
 * should always have at least one FFP connection but there may be a brief
 * window where a session in ACTIVE might have one or more FFP connections
 * even though ACTIVE is not strictly an FFP state according to the RFC.
 *
 * Login state machine -- drive the login process, collect negotiated
 * parameters.  Another side effect of this approach is that we may get
 * the "notify ffp" callback from the IDM connection state machine before
 * the login state machine has actually transitioned to FFP state.
 */

struct iscsit_conn_s;

/* Update iscsit_ss_name table whenever session states are modified */
typedef enum {
    SS_UNDEFINED = 0,
    SS_Q1_FREE,
    SS_Q2_ACTIVE,
    SS_Q3_LOGGED_IN,
    SS_Q4_FAILED,
    SS_Q5_CONTINUE,
    SS_Q6_DONE,
    SS_Q7_ERROR,
    /* Add new session states above SS_MAX_STATE */
    SS_MAX_STATE
} iscsit_session_state_t;

#ifdef ISCSIT_SESS_SM_STRINGS
/* An array of state text values, for use in logging state transitions */
static const char *iscsit_ss_name[SS_MAX_STATE+1] = {
    "SS_UNDEFINED",
    "SS_Q1_FREE",
    "SS_Q2_ACTIVE",
    "SS_Q3_LOGGED_IN",
    "SS_Q4_FAILED",
    "SS_Q5_CONTINUE",
    "SS_Q6_DONE",
    "SS_Q7_ERROR",
    "SS_MAX_STATE"
};
#endif

/* Update iscsit_se_name table whenever session events are modified */
typedef enum {
    SE_UNDEFINED = 0,
    SE_CONN_IN_LOGIN,   /* From login state machine */
    SE_CONN_LOGGED_IN,  /* FFP enabled client notification */
    SE_CONN_FFP_FAIL,   /* FFP disabled client notification */
    SE_CONN_FFP_DISABLE,    /* FFP disabled client notification */
    SE_CONN_FAIL,       /* Conn destroy client notification */
    SE_SESSION_CLOSE,   /* FFP disabled client notification */
    SE_SESSION_REINSTATE,   /* From login state machine */
    SE_SESSION_TIMEOUT, /* Internal */
    SE_SESSION_CONTINUE,    /* From login state machine */
    SE_SESSION_CONTINUE_FAIL, /* From login state machine? */
    /* Add new events above SE_MAX_EVENT */
    SE_MAX_EVENT
} iscsit_session_event_t;

#ifdef ISCSIT_SESS_SM_STRINGS
/* An array of event text values, for use in logging events */
static const char *iscsit_se_name[SE_MAX_EVENT+1] = {
    "SE_UNDEFINED",
    "SE_CONN_IN_LOGIN",
    "SE_CONN_LOGGED_IN",
    "SE_CONN_FFP_FAIL",
    "SE_CONN_FFP_DISABLE",
    "SE_CONN_FAIL",
    "SE_SESSION_CLOSE",
    "SE_SESSION_REINSTATE",
    "SE_SESSION_TIMEOUT",
    "SE_SESSION_CONTINUE",
    "SE_SESSION_CONTINUE_FAIL",
    "SE_MAX_EVENT"
};
#endif

/*
 * Set in ist_tgt after iscsit_tgt_unbind_sess to differentiate an unbound
 * session from a discovery session.
 */
#define SESS_UNBOUND_FROM_TGT   -1

typedef struct {
    stmf_scsi_session_t *ist_stmf_sess;
    stmf_local_port_t   *ist_lport;
    iscsit_tgt_t        *ist_tgt;
    idm_refcnt_t        ist_refcnt;
    kmem_cache_t        *ist_task_cache;
    kmutex_t        ist_sn_mutex;
    kmutex_t        ist_mutex;
    kcondvar_t      ist_cv;
    iscsit_session_state_t  ist_state;
    iscsit_session_state_t  ist_last_state;
    sm_audit_buf_t      ist_state_audit;
    boolean_t       ist_sm_busy;
    boolean_t       ist_sm_complete;
    boolean_t       ist_admin_close;
    list_t          ist_events;
    int         ist_conn_count;
    int         ist_ffp_conn_count;
    struct iscsit_conn_s    *ist_failed_conn;
    timeout_id_t        ist_state_timeout;
    list_t          ist_conn_list;
    avl_node_t      ist_tgt_ln;
    char            *ist_initiator_name;
    char            *ist_initiator_alias;
    char            *ist_target_name;
    char            *ist_target_alias;
    uint8_t         ist_isid[ISCSI_ISID_LEN];
    uint16_t        ist_tsih;
    uint16_t        ist_tpgt_tag;
    uint32_t        ist_expcmdsn;
    uint32_t        ist_maxcmdsn;
    avl_tree_t      ist_task_list;
    iscsit_cbuf_t       *ist_rxpdu_queue;
} iscsit_sess_t;

/* Update iscsit_ils_name table whenever login states are modified */
typedef enum {
    ILS_UNDEFINED = 0,
    ILS_LOGIN_INIT,
    ILS_LOGIN_WAITING,  /* Waiting for more login PDU's */
    ILS_LOGIN_PROCESSING,   /* Processing login request */
    ILS_LOGIN_RESPONDING,   /* Sending login response */
    ILS_LOGIN_RESPONDED,    /* Sent login response (no trans. to FFP) */
    ILS_LOGIN_FFP,      /* Sending last login PDU for final response */
    ILS_LOGIN_DONE,     /* Last login PDU sent (so we can free it) */
    ILS_LOGIN_ERROR,    /* Login error, login failed */
    /* Add new login states above ILS_MAX_STATE */
    ILS_MAX_STATE
} iscsit_login_state_t;

#ifdef ISCSIT_LOGIN_SM_STRINGS
/* An array of login state text values, for use in logging login progress */
static const char *iscsit_ils_name[ILS_MAX_STATE+1] = {
    "ILS_UNDEFINED",
    "ILS_LOGIN_INIT",
    "ILS_LOGIN_WAITING",
    "ILS_LOGIN_PROCESSING",
    "ILS_LOGIN_RESPONDING",
    "ILS_LOGIN_RESPONDED",
    "ILS_LOGIN_FFP",
    "ILS_LOGIN_DONE",
    "ILS_LOGIN_ERROR",
    "ILS_MAX_STATE"
};
#endif

/* Update iscsit_ile_name table whenever login events are modified */
typedef enum {
    ILE_UNDEFINED = 0,
    ILE_LOGIN_RCV,
    ILE_LOGIN_RESP_READY,
    ILE_LOGIN_FFP,
    ILE_LOGIN_RESP_COMPLETE,
    ILE_LOGIN_ERROR,
    ILE_LOGIN_CONN_ERROR,
    /* Add new login events above ILE_MAX_EVENT */
    ILE_MAX_EVENT
} iscsit_login_event_t;

#ifdef ISCSIT_LOGIN_SM_STRINGS
/* An array of login event text values, for use in logging login events */
static const char *iscsit_ile_name[ILE_MAX_EVENT+1] = {
    "ILE_UNDEFINED",
    "ILE_LOGIN_RCV",
    "ILE_LOGIN_RESP_READY",
    "ILE_LOGIN_FFP",
    "ILE_LOGIN_RESP_COMPLETE",
    "ILE_LOGIN_ERROR",
    "ILE_LOGIN_CONN_ERROR",
    "ILE_MAX_EVENT"
};
#endif

typedef struct {
    uint32_t        op_initial_params_set:1,
                op_discovery_session:1,
                op_initial_r2t:1,
                op_immed_data:1,
                op_data_pdu_in_order:1,
                op_data_sequence_in_order:1,
                op_declarative_params_set:1;
    uint64_t        op_max_connections;
    uint64_t        op_max_recv_data_segment_length;
    uint64_t        op_max_burst_length;
    uint64_t        op_first_burst_length;
    uint64_t        op_default_time_2_wait;
    uint64_t        op_default_time_2_retain;
    uint64_t        op_max_outstanding_r2t;
    uint64_t        op_error_recovery_level;
} iscsit_op_params_t;

typedef struct {
    iscsit_login_state_t    icl_login_state;
    iscsit_login_state_t    icl_login_last_state;
    sm_audit_buf_t      icl_state_audit;
    boolean_t       icl_busy;
    boolean_t       icl_login_complete;
    kmutex_t        icl_mutex;
    uint32_t        icl_login_itt;
    uint8_t         icl_login_csg;
    uint8_t         icl_login_nsg;
    boolean_t       icl_login_transit;
    conn_auth_t     icl_auth;
    iscsit_auth_client_t    icl_auth_client;
    int         icl_auth_pass;
    list_t          icl_login_events;
    list_t          icl_pdu_list;
    uint16_t        icl_tsih;
    uint8_t         icl_isid[ISCSI_ISID_LEN];
    uint32_t        icl_cmdsn;
    uint16_t        icl_tpgt_tag;
    char            *icl_target_name;
    char            *icl_target_alias;
    char            *icl_initiator_name;
    char            *icl_login_resp_buf;
    void            *icl_login_resp_itb; /* mult-pdu idm buf */
    int         icl_login_resp_len; /* For kmem_free */
    int         icl_login_resp_valid_len;
    uint8_t         icl_login_resp_err_class;
    uint8_t         icl_login_resp_err_detail;
    iscsi_login_rsp_hdr_t   *icl_login_resp_tmpl;
    nvlist_t        *icl_request_nvlist;
    nvlist_t        *icl_response_nvlist;
    nvlist_t        *icl_negotiated_values;
} iscsit_conn_login_t;

#define SET_LOGIN_ERROR(SLE_ICT, SLE_CLASS, SLE_DETAIL) \
    (SLE_ICT)->ict_login_sm.icl_login_resp_err_class = (SLE_CLASS); \
    (SLE_ICT)->ict_login_sm.icl_login_resp_err_detail = (SLE_DETAIL);

typedef struct iscsit_conn_s {
    idm_conn_t      *ict_ic;
    iscsit_sess_t       *ict_sess;
    kmutex_t        ict_mutex;
    idm_refcnt_t        ict_refcnt;
    idm_refcnt_t        ict_dispatch_refcnt;
    list_node_t     ict_sess_ln;
    iscsit_conn_login_t ict_login_sm;
    iscsit_op_params_t  ict_op;
    uint16_t        ict_cid;
    uint32_t        ict_statsn;
    kmutex_t        ict_statsn_mutex;
    uint32_t        ict_keepalive_ttt;
    struct iscsit_conn_s    *ict_reinstate_conn;
    uint32_t        ict_reinstating:1,
                ict_lost:1,
                ict_destroyed:1;
    /*
     * Parameters for processing text commands
     */
    char            *ict_text_rsp_buf;
    uint32_t        ict_text_rsp_len;
    uint32_t        ict_text_rsp_valid_len;
    uint32_t        ict_text_rsp_off;
    uint32_t        ict_text_req_itt;   /* from initiator */
    uint32_t        ict_text_rsp_ttt;
} iscsit_conn_t;

#define ICT_FLAGS_DISCOVERY 0x00000001

typedef struct {
    idm_buf_t       *ibuf_idm_buf;
    stmf_data_buf_t     *ibuf_stmf_buf;
    idm_pdu_t       *ibuf_immed_data_pdu;
    boolean_t       ibuf_is_immed;
} iscsit_buf_t;

typedef struct {
    scsi_task_t     *it_stmf_task;
    idm_task_t      *it_idm_task;
    iscsit_buf_t        *it_immed_data;
    iscsit_conn_t       *it_ict;
    kmutex_t        it_mutex;
    idm_pdu_t       *it_tm_pdu;
    uint32_t        it_stmf_abort:1,
                it_aborted:1,
                it_active:1,
                it_tm_task:1,
                it_tm_responded:1;
    uint32_t        it_cmdsn;
    uint32_t        it_itt;
    uint32_t        it_ttt;
    avl_node_t      it_sess_ln;
} iscsit_task_t;

typedef struct iscsit_isns_cfg {
    kmutex_t        isns_mutex;
    boolean_t       isns_state;
    list_t          isns_svrs;
} iscsit_isns_cfg_t;

/*
 * State values for the iscsit service
 */
typedef enum {
    ISE_UNDEFINED = 0,
    ISE_DETACHED,
    ISE_DISABLED,
    ISE_ENABLING,
    ISE_ENABLED,
    ISE_BUSY,
    ISE_DISABLING
} iscsit_service_enabled_t;


typedef struct {
    iscsit_service_enabled_t    global_svc_state;
    dev_info_t          *global_dip;
    ldi_ident_t         global_li;
    nvlist_t            *global_props;
    stmf_port_provider_t        *global_pp;
    stmf_dbuf_store_t       *global_dbuf_store;
    taskq_t             *global_dispatch_taskq;
    idm_refcnt_t            global_refcnt;
    avl_tree_t          global_discovery_sessions;
    avl_tree_t          global_target_list;
    list_t              global_deleted_target_list;
    avl_tree_t          global_tpg_list;
    avl_tree_t          global_ini_list;
    iscsit_tpg_t            *global_default_tpg;
    vmem_t              *global_tsih_pool;
    iscsit_isns_cfg_t       global_isns_cfg;
    iscsi_radius_props_t        global_radius_server;
    krwlock_t           global_rwlock;
    kmutex_t            global_state_mutex;
} iscsit_global_t;

extern iscsit_global_t iscsit_global;

void
iscsit_global_hold();

void
iscsit_global_rele();

void
iscsit_global_wait_ref();

idm_status_t
iscsit_login_sm_init(iscsit_conn_t *ict);

void
iscsit_login_sm_fini(iscsit_conn_t *ict);

void
iscsit_login_sm_event(iscsit_conn_t *ic, iscsit_login_event_t event,
    idm_pdu_t *pdu);

void
iscsit_login_sm_event_locked(iscsit_conn_t *ic, iscsit_login_event_t event,
    idm_pdu_t *pdu);

void
iscsit_send_async_event(iscsit_conn_t *ict, uint8_t async_event);

void
iscsit_pdu_tx(idm_pdu_t *pdu);

void
iscsit_send_reject(iscsit_conn_t *ict, idm_pdu_t *rejected_pdu, uint8_t reason);

void
iscsit_text_cmd_fini(iscsit_conn_t *ict);

/*
 * IDM conn ops
 */

idm_rx_pdu_cb_t     iscsit_op_scsi_cmd;
idm_rx_pdu_cb_t     iscsit_rx_pdu;
idm_rx_pdu_error_cb_t   iscsit_rx_pdu_error;
idm_task_cb_t       iscsit_task_aborted;
idm_client_notify_cb_t  iscsit_client_notify;
idm_build_hdr_cb_t  iscsit_build_hdr;
idm_update_statsn_cb_t  iscsit_update_statsn;
idm_keepalive_cb_t  iscsit_keepalive;

/*
 * lport entry points
 */
stmf_status_t
iscsit_xfer_scsi_data(scsi_task_t *task, stmf_data_buf_t *dbuf,
    uint32_t ioflags);

stmf_status_t
iscsit_send_scsi_status(scsi_task_t *task, uint32_t ioflags);

void
iscsit_lport_task_free(scsi_task_t *task);

stmf_status_t
iscsit_abort(stmf_local_port_t *lport, int abort_cmd, void *arg,
    uint32_t flags);

void
iscsit_ctl(stmf_local_port_t *lport, int cmd, void *arg);

/*
 * Connection functions
 */
idm_status_t
iscsit_conn_reinstate(iscsit_conn_t *existing_ict, iscsit_conn_t *ict);

void
iscsit_conn_destroy_done(iscsit_conn_t *ict);

void
iscsit_conn_set_auth(iscsit_conn_t *ict);

void
iscsit_conn_hold(iscsit_conn_t *ict);

void
iscsit_conn_rele(iscsit_conn_t *ict);

/*
 * Session functions
 */
int
iscsit_sess_avl_compare(const void *void_sess1, const void *void_sess2);

iscsit_sess_t *
iscsit_sess_create(iscsit_tgt_t *tgt, iscsit_conn_t *ict,
    uint32_t cmdsn, uint8_t *isid, uint16_t tag,
    char *initiator_name, char *target_name,
    uint8_t *error_class, uint8_t *error_detail);

void
iscsit_sess_destroy(iscsit_sess_t *ist);

void
iscsit_sess_hold(iscsit_sess_t *ist);

void
iscsit_sess_rele(iscsit_sess_t *ist);

iscsit_conn_t *
iscsit_sess_lookup_conn(iscsit_sess_t *ist, uint16_t cid);

void
iscsit_sess_bind_conn(iscsit_sess_t *ist, iscsit_conn_t *ict);

void
iscsit_sess_unbind_conn(iscsit_sess_t *ist, iscsit_conn_t *ict);

void
iscsit_sess_close(iscsit_sess_t *ist);

iscsit_sess_t *
iscsit_sess_reinstate(iscsit_tgt_t *tgt, iscsit_sess_t *ist, iscsit_conn_t *ict,
    uint8_t *error_class, uint8_t *error_detail);

void
iscsit_sess_sm_event(iscsit_sess_t *ist, iscsit_session_event_t event,
    iscsit_conn_t *ict);

/*
 * Target, TPGT, TPGT and portal functions
 */

void
iscsit_tgt_sm_event(iscsit_tgt_t *tgt, iscsit_tgt_event_t event);

void
tgt_sm_event_locked(iscsit_tgt_t *tgt, iscsit_tgt_event_t event);

it_cfg_status_t
iscsit_config_merge_tgt(it_config_t *cfg);

void
iscsit_config_destroy_tgts(list_t *tgt_del_list);

void
iscsit_config_destroy_tpgts(list_t *tpgt_del_list);

iscsit_tgt_t *
iscsit_tgt_lookup(char *target_name);

iscsit_tgt_t *
iscsit_tgt_lookup_locked(char *target_name);

int
iscsit_tgt_avl_compare(const void *void_tgt1, const void *void_tgt2);

int
iscsit_tpgt_avl_compare(const void *void_tpgt1, const void *void_tpgt2);

void
iscsit_tgt_hold(iscsit_tgt_t *tgt);

void
iscsit_tgt_rele(iscsit_tgt_t *tgt);

iscsit_tpgt_t *
iscsit_tgt_lookup_tpgt(iscsit_tgt_t *tgt, uint16_t tag);

void
iscsit_tpgt_hold(iscsit_tpgt_t *tpgt);

void
iscsit_tpgt_rele(iscsit_tpgt_t *tpgt);

iscsit_portal_t *
iscsit_tgt_lookup_portal(iscsit_tgt_t *tgt, struct sockaddr_storage *sa,
    iscsit_tpgt_t **output_tpgt);

iscsit_sess_t *
iscsit_tgt_lookup_sess(iscsit_tgt_t *tgt, char *initiator_name,
    uint8_t *isid, uint16_t tsih, uint16_t tag);

void
iscsit_tgt_bind_sess(iscsit_tgt_t *tgt, iscsit_sess_t *sess);

void
iscsit_tgt_unbind_sess(iscsit_tgt_t *tgt, iscsit_sess_t *sess);

it_cfg_status_t
iscsit_config_merge_tpg(it_config_t *cfg, list_t *tpg_del_list);

void
iscsit_config_destroy_tpgs(list_t *tpg_del_list);

iscsit_tpg_t *
iscsit_tpg_lookup(char *tpg_name);

int
iscsit_tpg_avl_compare(const void *void_tpg1, const void *void_tpg2);

void
iscsit_tpg_hold(iscsit_tpg_t *tpg);

void
iscsit_tpg_rele(iscsit_tpg_t *tpg);

iscsit_tpg_t *
iscsit_tpg_createdefault();

void
iscsit_tpg_destroydefault(iscsit_tpg_t *tpg);

idm_status_t
iscsit_tpg_online(iscsit_tpg_t *tpg);

void
iscsit_tpg_offline(iscsit_tpg_t *tpg);

iscsit_portal_t *
iscsit_tpg_portal_lookup(iscsit_tpg_t *tpg, struct sockaddr_storage *sa);

void
iscsit_portal_hold(iscsit_portal_t *portal);

void
iscsit_portal_rele(iscsit_portal_t *portal);

it_cfg_status_t
iscsit_config_merge_ini(it_config_t *cfg);

int
iscsit_ini_avl_compare(const void *void_ini1, const void *void_ini2);

iscsit_ini_t *
iscsit_ini_lookup_locked(char *ini_name);

int
iscsit_portal_avl_compare(const void *void_portal1, const void *void_portal2);

int
iscsit_verify_chap_resp(iscsit_conn_login_t *lsm,
    unsigned int chap_i, uchar_t *chap_c, unsigned int challenge_len,
    uchar_t *chap_r, unsigned int resp_len);

void
iscsit_rxpdu_queue_monitor_start(void);

void
iscsit_rxpdu_queue_monitor_stop(void);

#endif /* _ISCSIT_H_ */