drivers/target/iscsi/iscsi_target_core.h

   1 #ifndef ISCSI_TARGET_CORE_H
   2 #define ISCSI_TARGET_CORE_H
   3
   4 #include <linux/in.h>
   5 #include <linux/configfs.h>
   6 #include <net/sock.h>
   7 #include <net/tcp.h>
   8 #include <scsi/scsi_cmnd.h>
   9 #include <scsi/iscsi_proto.h>
  10 #include <target/target_core_base.h>
  11
  12 #define ISCSIT_VERSION                  "v4.1.0-rc2"
  13 #define ISCSI_MAX_DATASN_MISSING_COUNT  16
  14 #define ISCSI_TX_THREAD_TCP_TIMEOUT     2
  15 #define ISCSI_RX_THREAD_TCP_TIMEOUT     2
  16 #define SECONDS_FOR_ASYNC_LOGOUT        10
  17 #define SECONDS_FOR_ASYNC_TEXT          10
  18 #define SECONDS_FOR_LOGOUT_COMP         15
  19 #define WHITE_SPACE                     " \t\v\f\n\r"
  20
  21 /* struct iscsi_node_attrib sanity values */
  22 #define NA_DATAOUT_TIMEOUT              3
  23 #define NA_DATAOUT_TIMEOUT_MAX          60
  24 #define NA_DATAOUT_TIMEOUT_MIX          2
  25 #define NA_DATAOUT_TIMEOUT_RETRIES      5
  26 #define NA_DATAOUT_TIMEOUT_RETRIES_MAX  15
  27 #define NA_DATAOUT_TIMEOUT_RETRIES_MIN  1
  28 #define NA_NOPIN_TIMEOUT                15
  29 #define NA_NOPIN_TIMEOUT_MAX            60
  30 #define NA_NOPIN_TIMEOUT_MIN            3
  31 #define NA_NOPIN_RESPONSE_TIMEOUT       30
  32 #define NA_NOPIN_RESPONSE_TIMEOUT_MAX   60
  33 #define NA_NOPIN_RESPONSE_TIMEOUT_MIN   3
  34 #define NA_RANDOM_DATAIN_PDU_OFFSETS    0
  35 #define NA_RANDOM_DATAIN_SEQ_OFFSETS    0
  36 #define NA_RANDOM_R2T_OFFSETS           0
  37 #define NA_DEFAULT_ERL                  0
  38 #define NA_DEFAULT_ERL_MAX              2
  39 #define NA_DEFAULT_ERL_MIN              0
  40
  41 /* struct iscsi_tpg_attrib sanity values */
  42 #define TA_AUTHENTICATION               1
  43 #define TA_LOGIN_TIMEOUT                15
  44 #define TA_LOGIN_TIMEOUT_MAX            30
  45 #define TA_LOGIN_TIMEOUT_MIN            5
  46 #define TA_NETIF_TIMEOUT                2
  47 #define TA_NETIF_TIMEOUT_MAX            15
  48 #define TA_NETIF_TIMEOUT_MIN            2
  49 #define TA_GENERATE_NODE_ACLS           0
  50 #define TA_DEFAULT_CMDSN_DEPTH          16
  51 #define TA_DEFAULT_CMDSN_DEPTH_MAX      512
  52 #define TA_DEFAULT_CMDSN_DEPTH_MIN      1
  53 #define TA_CACHE_DYNAMIC_ACLS           0
  54 /* Enabled by default in demo mode (generic_node_acls=1) */
  55 #define TA_DEMO_MODE_WRITE_PROTECT      1
  56 /* Disabled by default in production mode w/ explict ACLs */
  57 #define TA_PROD_MODE_WRITE_PROTECT      0
  58 #define TA_CACHE_CORE_NPS               0
  59
  60
  61 #define ISCSI_IOV_DATA_BUFFER           5
  62
  63 enum tpg_np_network_transport_table {
  64         ISCSI_TCP                               = 0,
  65         ISCSI_SCTP_TCP                          = 1,
  66         ISCSI_SCTP_UDP                          = 2,
  67         ISCSI_IWARP_TCP                         = 3,
  68         ISCSI_IWARP_SCTP                        = 4,
  69         ISCSI_INFINIBAND                        = 5,
  70 };
  71
  72 /* RFC-3720 7.1.4  Standard Connection State Diagram for a Target */
  73 enum target_conn_state_table {
  74         TARG_CONN_STATE_FREE                    = 0x1,
  75         TARG_CONN_STATE_XPT_UP                  = 0x3,
  76         TARG_CONN_STATE_IN_LOGIN                = 0x4,
  77         TARG_CONN_STATE_LOGGED_IN               = 0x5,
  78         TARG_CONN_STATE_IN_LOGOUT               = 0x6,
  79         TARG_CONN_STATE_LOGOUT_REQUESTED        = 0x7,
  80         TARG_CONN_STATE_CLEANUP_WAIT            = 0x8,
  81 };
  82
  83 /* RFC-3720 7.3.2  Session State Diagram for a Target */
  84 enum target_sess_state_table {
  85         TARG_SESS_STATE_FREE                    = 0x1,
  86         TARG_SESS_STATE_ACTIVE                  = 0x2,
  87         TARG_SESS_STATE_LOGGED_IN               = 0x3,
  88         TARG_SESS_STATE_FAILED                  = 0x4,
  89         TARG_SESS_STATE_IN_CONTINUE             = 0x5,
  90 };
  91
  92 /* struct iscsi_data_count->type */
  93 enum data_count_type {
  94         ISCSI_RX_DATA   = 1,
  95         ISCSI_TX_DATA   = 2,
  96 };
  97
  98 /* struct iscsi_datain_req->dr_complete */
  99 enum datain_req_comp_table {
 100         DATAIN_COMPLETE_NORMAL                  = 1,
 101         DATAIN_COMPLETE_WITHIN_COMMAND_RECOVERY = 2,
 102         DATAIN_COMPLETE_CONNECTION_RECOVERY     = 3,
 103 };
 104
 105 /* struct iscsi_datain_req->recovery */
 106 enum datain_req_rec_table {
 107         DATAIN_WITHIN_COMMAND_RECOVERY          = 1,
 108         DATAIN_CONNECTION_RECOVERY              = 2,
 109 };
 110
 111 /* struct iscsi_portal_group->state */
 112 enum tpg_state_table {
 113         TPG_STATE_FREE                          = 0,
 114         TPG_STATE_ACTIVE                        = 1,
 115         TPG_STATE_INACTIVE                      = 2,
 116         TPG_STATE_COLD_RESET                    = 3,
 117 };
 118
 119 /* struct iscsi_tiqn->tiqn_state */
 120 enum tiqn_state_table {
 121         TIQN_STATE_ACTIVE                       = 1,
 122         TIQN_STATE_SHUTDOWN                     = 2,
 123 };
 124
 125 /* struct iscsi_cmd->cmd_flags */
 126 enum cmd_flags_table {
 127         ICF_GOT_LAST_DATAOUT                    = 0x00000001,
 128         ICF_GOT_DATACK_SNACK                    = 0x00000002,
 129         ICF_NON_IMMEDIATE_UNSOLICITED_DATA      = 0x00000004,
 130         ICF_SENT_LAST_R2T                       = 0x00000008,
 131         ICF_WITHIN_COMMAND_RECOVERY             = 0x00000010,
 132         ICF_CONTIG_MEMORY                       = 0x00000020,
 133         ICF_ATTACHED_TO_RQUEUE                  = 0x00000040,
 134         ICF_OOO_CMDSN                           = 0x00000080,
 135         ICF_REJECT_FAIL_CONN                    = 0x00000100,
 136 };
 137
 138 /* struct iscsi_cmd->i_state */
 139 enum cmd_i_state_table {
 140         ISTATE_NO_STATE                 = 0,
 141         ISTATE_NEW_CMD                  = 1,
 142         ISTATE_DEFERRED_CMD             = 2,
 143         ISTATE_UNSOLICITED_DATA         = 3,
 144         ISTATE_RECEIVE_DATAOUT          = 4,
 145         ISTATE_RECEIVE_DATAOUT_RECOVERY = 5,
 146         ISTATE_RECEIVED_LAST_DATAOUT    = 6,
 147         ISTATE_WITHIN_DATAOUT_RECOVERY  = 7,
 148         ISTATE_IN_CONNECTION_RECOVERY   = 8,
 149         ISTATE_RECEIVED_TASKMGT         = 9,
 150         ISTATE_SEND_ASYNCMSG            = 10,
 151         ISTATE_SENT_ASYNCMSG            = 11,
 152         ISTATE_SEND_DATAIN              = 12,
 153         ISTATE_SEND_LAST_DATAIN         = 13,
 154         ISTATE_SENT_LAST_DATAIN         = 14,
 155         ISTATE_SEND_LOGOUTRSP           = 15,
 156         ISTATE_SENT_LOGOUTRSP           = 16,
 157         ISTATE_SEND_NOPIN               = 17,
 158         ISTATE_SENT_NOPIN               = 18,
 159         ISTATE_SEND_REJECT              = 19,
 160         ISTATE_SENT_REJECT              = 20,
 161         ISTATE_SEND_R2T                 = 21,
 162         ISTATE_SENT_R2T                 = 22,
 163         ISTATE_SEND_R2T_RECOVERY        = 23,
 164         ISTATE_SENT_R2T_RECOVERY        = 24,
 165         ISTATE_SEND_LAST_R2T            = 25,
 166         ISTATE_SENT_LAST_R2T            = 26,
 167         ISTATE_SEND_LAST_R2T_RECOVERY   = 27,
 168         ISTATE_SENT_LAST_R2T_RECOVERY   = 28,
 169         ISTATE_SEND_STATUS              = 29,
 170         ISTATE_SEND_STATUS_BROKEN_PC    = 30,
 171         ISTATE_SENT_STATUS              = 31,
 172         ISTATE_SEND_STATUS_RECOVERY     = 32,
 173         ISTATE_SENT_STATUS_RECOVERY     = 33,
 174         ISTATE_SEND_TASKMGTRSP          = 34,
 175         ISTATE_SENT_TASKMGTRSP          = 35,
 176         ISTATE_SEND_TEXTRSP             = 36,
 177         ISTATE_SENT_TEXTRSP             = 37,
 178         ISTATE_SEND_NOPIN_WANT_RESPONSE = 38,
 179         ISTATE_SENT_NOPIN_WANT_RESPONSE = 39,
 180         ISTATE_SEND_NOPIN_NO_RESPONSE   = 40,
 181         ISTATE_REMOVE                   = 41,
 182         ISTATE_FREE                     = 42,
 183 };
 184
 185 /* Used for iscsi_recover_cmdsn() return values */
 186 enum recover_cmdsn_ret_table {
 187         CMDSN_ERROR_CANNOT_RECOVER      = -1,
 188         CMDSN_NORMAL_OPERATION          = 0,
 189         CMDSN_LOWER_THAN_EXP            = 1,
 190         CMDSN_HIGHER_THAN_EXP           = 2,
 191 };
 192
 193 /* Used for iscsi_handle_immediate_data() return values */
 194 enum immedate_data_ret_table {
 195         IMMEDIATE_DATA_CANNOT_RECOVER   = -1,
 196         IMMEDIATE_DATA_NORMAL_OPERATION = 0,
 197         IMMEDIATE_DATA_ERL1_CRC_FAILURE = 1,
 198 };
 199
 200 /* Used for iscsi_decide_dataout_action() return values */
 201 enum dataout_action_ret_table {
 202         DATAOUT_CANNOT_RECOVER          = -1,
 203         DATAOUT_NORMAL                  = 0,
 204         DATAOUT_SEND_R2T                = 1,
 205         DATAOUT_SEND_TO_TRANSPORT       = 2,
 206         DATAOUT_WITHIN_COMMAND_RECOVERY = 3,
 207 };
 208
 209 /* Used for struct iscsi_node_auth->naf_flags */
 210 enum naf_flags_table {
 211         NAF_USERID_SET                  = 0x01,
 212         NAF_PASSWORD_SET                = 0x02,
 213         NAF_USERID_IN_SET               = 0x04,
 214         NAF_PASSWORD_IN_SET             = 0x08,
 215 };
 216
 217 /* Used by various struct timer_list to manage iSCSI specific state */
 218 enum iscsi_timer_flags_table {
 219         ISCSI_TF_RUNNING                = 0x01,
 220         ISCSI_TF_STOP                   = 0x02,
 221         ISCSI_TF_EXPIRED                = 0x04,
 222 };
 223
 224 /* Used for struct iscsi_np->np_flags */
 225 enum np_flags_table {
 226         NPF_IP_NETWORK          = 0x00,
 227 };
 228
 229 /* Used for struct iscsi_np->np_thread_state */
 230 enum np_thread_state_table {
 231         ISCSI_NP_THREAD_ACTIVE          = 1,
 232         ISCSI_NP_THREAD_INACTIVE        = 2,
 233         ISCSI_NP_THREAD_RESET           = 3,
 234         ISCSI_NP_THREAD_SHUTDOWN        = 4,
 235         ISCSI_NP_THREAD_EXIT            = 5,
 236 };
 237
 238 struct iscsi_conn_ops {
 239         u8      HeaderDigest;                   /* [0,1] == [None,CRC32C] */
 240         u8      DataDigest;                     /* [0,1] == [None,CRC32C] */
 241         u32     MaxRecvDataSegmentLength;       /* [512..2**24-1] */
 242         u32     MaxXmitDataSegmentLength;       /* [512..2**24-1] */
 243         u8      OFMarker;                       /* [0,1] == [No,Yes] */
 244         u8      IFMarker;                       /* [0,1] == [No,Yes] */
 245         u32     OFMarkInt;                      /* [1..65535] */
 246         u32     IFMarkInt;                      /* [1..65535] */
 247 };
 248
 249 struct iscsi_sess_ops {
 250         char    InitiatorName[224];
 251         char    InitiatorAlias[256];
 252         char    TargetName[224];
 253         char    TargetAlias[256];
 254         char    TargetAddress[256];
 255         u16     TargetPortalGroupTag;           /* [0..65535] */
 256         u16     MaxConnections;                 /* [1..65535] */
 257         u8      InitialR2T;                     /* [0,1] == [No,Yes] */
 258         u8      ImmediateData;                  /* [0,1] == [No,Yes] */
 259         u32     MaxBurstLength;                 /* [512..2**24-1] */
 260         u32     FirstBurstLength;               /* [512..2**24-1] */
 261         u16     DefaultTime2Wait;               /* [0..3600] */
 262         u16     DefaultTime2Retain;             /* [0..3600] */
 263         u16     MaxOutstandingR2T;              /* [1..65535] */
 264         u8      DataPDUInOrder;                 /* [0,1] == [No,Yes] */
 265         u8      DataSequenceInOrder;            /* [0,1] == [No,Yes] */
 266         u8      ErrorRecoveryLevel;             /* [0..2] */
 267         u8      SessionType;                    /* [0,1] == [Normal,Discovery]*/
 268 };
 269
 270 struct iscsi_queue_req {
 271         int                     state;
 272         struct iscsi_cmd        *cmd;
 273         struct list_head        qr_list;
 274 };
 275
 276 struct iscsi_data_count {
 277         int                     data_length;
 278         int                     sync_and_steering;
 279         enum data_count_type    type;
 280         u32                     iov_count;
 281         u32                     ss_iov_count;
 282         u32                     ss_marker_count;
 283         struct kvec             *iov;
 284 };
 285
 286 struct iscsi_param_list {
 287         struct list_head        param_list;
 288         struct list_head        extra_response_list;
 289 };
 290
 291 struct iscsi_datain_req {
 292         enum datain_req_comp_table dr_complete;
 293         int                     generate_recovery_values;
 294         enum datain_req_rec_table recovery;
 295         u32                     begrun;
 296         u32                     runlength;
 297         u32                     data_length;
 298         u32                     data_offset;
 299         u32                     data_sn;
 300         u32                     next_burst_len;
 301         u32                     read_data_done;
 302         u32                     seq_send_order;
 303         struct list_head        cmd_datain_node;
 304 } ____cacheline_aligned;
 305
 306 struct iscsi_ooo_cmdsn {
 307         u16                     cid;
 308         u32                     batch_count;
 309         u32                     cmdsn;
 310         u32                     exp_cmdsn;
 311         struct iscsi_cmd        *cmd;
 312         struct list_head        ooo_list;
 313 } ____cacheline_aligned;
 314
 315 struct iscsi_datain {
 316         u8                      flags;
 317         u32                     data_sn;
 318         u32                     length;
 319         u32                     offset;
 320 } ____cacheline_aligned;
 321
 322 struct iscsi_r2t {
 323         int                     seq_complete;
 324         int                     recovery_r2t;
 325         int                     sent_r2t;
 326         u32                     r2t_sn;
 327         u32                     offset;
 328         u32                     targ_xfer_tag;
 329         u32                     xfer_len;
 330         struct list_head        r2t_list;
 331 } ____cacheline_aligned;
 332
 333 struct iscsi_cmd {
 334         enum iscsi_timer_flags_table dataout_timer_flags;
 335         /* DataOUT timeout retries */
 336         u8                      dataout_timeout_retries;
 337         /* Within command recovery count */
 338         u8                      error_recovery_count;
 339         /* iSCSI dependent state for out or order CmdSNs */
 340         enum cmd_i_state_table  deferred_i_state;
 341         /* iSCSI dependent state */
 342         enum cmd_i_state_table  i_state;
 343         /* Command is an immediate command (ISCSI_OP_IMMEDIATE set) */
 344         u8                      immediate_cmd;
 345         /* Immediate data present */
 346         u8                      immediate_data;
 347         /* iSCSI Opcode */
 348         u8                      iscsi_opcode;
 349         /* iSCSI Response Code */
 350         u8                      iscsi_response;
 351         /* Logout reason when iscsi_opcode == ISCSI_INIT_LOGOUT_CMND */
 352         u8                      logout_reason;
 353         /* Logout response code when iscsi_opcode == ISCSI_INIT_LOGOUT_CMND */
 354         u8                      logout_response;
 355         /* MaxCmdSN has been incremented */
 356         u8                      maxcmdsn_inc;
 357         /* Immediate Unsolicited Dataout */
 358         u8                      unsolicited_data;
 359         /* CID contained in logout PDU when opcode == ISCSI_INIT_LOGOUT_CMND */
 360         u16                     logout_cid;
 361         /* Command flags */
 362         enum cmd_flags_table    cmd_flags;
 363         /* Initiator Task Tag assigned from Initiator */
 364         itt_t                   init_task_tag;
 365         /* Target Transfer Tag assigned from Target */
 366         u32                     targ_xfer_tag;
 367         /* CmdSN assigned from Initiator */
 368         u32                     cmd_sn;
 369         /* ExpStatSN assigned from Initiator */
 370         u32                     exp_stat_sn;
 371         /* StatSN assigned to this ITT */
 372         u32                     stat_sn;
 373         /* DataSN Counter */
 374         u32                     data_sn;
 375         /* R2TSN Counter */
 376         u32                     r2t_sn;
 377         /* Last DataSN acknowledged via DataAck SNACK */
 378         u32                     acked_data_sn;
 379         /* Used for echoing NOPOUT ping data */
 380         u32                     buf_ptr_size;
 381         /* Used to store DataDigest */
 382         u32                     data_crc;
 383         /* Counter for MaxOutstandingR2T */
 384         u32                     outstanding_r2ts;
 385         /* Next R2T Offset when DataSequenceInOrder=Yes */
 386         u32                     r2t_offset;
 387         /* Iovec current and orig count for iscsi_cmd->iov_data */
 388         u32                     iov_data_count;
 389         u32                     orig_iov_data_count;
 390         /* Number of miscellaneous iovecs used for IP stack calls */
 391         u32                     iov_misc_count;
 392         /* Number of struct iscsi_pdu in struct iscsi_cmd->pdu_list */
 393         u32                     pdu_count;
 394         /* Next struct iscsi_pdu to send in struct iscsi_cmd->pdu_list */
 395         u32                     pdu_send_order;
 396         /* Current struct iscsi_pdu in struct iscsi_cmd->pdu_list */
 397         u32                     pdu_start;
 398         /* Next struct iscsi_seq to send in struct iscsi_cmd->seq_list */
 399         u32                     seq_send_order;
 400         /* Number of struct iscsi_seq in struct iscsi_cmd->seq_list */
 401         u32                     seq_count;
 402         /* Current struct iscsi_seq in struct iscsi_cmd->seq_list */
 403         u32                     seq_no;
 404         /* Lowest offset in current DataOUT sequence */
 405         u32                     seq_start_offset;
 406         /* Highest offset in current DataOUT sequence */
 407         u32                     seq_end_offset;
 408         /* Total size in bytes received so far of READ data */
 409         u32                     read_data_done;
 410         /* Total size in bytes received so far of WRITE data */
 411         u32                     write_data_done;
 412         /* Counter for FirstBurstLength key */
 413         u32                     first_burst_len;
 414         /* Counter for MaxBurstLength key */
 415         u32                     next_burst_len;
 416         /* Transfer size used for IP stack calls */
 417         u32                     tx_size;
 418         /* Buffer used for various purposes */
 419         void                    *buf_ptr;
 420         /* See include/linux/dma-mapping.h */
 421         enum dma_data_direction data_direction;
 422         /* iSCSI PDU Header + CRC */
 423         unsigned char           pdu[ISCSI_HDR_LEN + ISCSI_CRC_LEN];
 424         /* Number of times struct iscsi_cmd is present in immediate queue */
 425         atomic_t                immed_queue_count;
 426         atomic_t                response_queue_count;
 427         spinlock_t              datain_lock;
 428         spinlock_t              dataout_timeout_lock;
 429         /* spinlock for protecting struct iscsi_cmd->i_state */
 430         spinlock_t              istate_lock;
 431         /* spinlock for adding within command recovery entries */
 432         spinlock_t              error_lock;
 433         /* spinlock for adding R2Ts */
 434         spinlock_t              r2t_lock;
 435         /* DataIN List */
 436         struct list_head        datain_list;
 437         /* R2T List */
 438         struct list_head        cmd_r2t_list;
 439         struct completion       reject_comp;
 440         /* Timer for DataOUT */
 441         struct timer_list       dataout_timer;
 442         /* Iovecs for SCSI data payload RX/TX w/ kernel level sockets */
 443         struct kvec             *iov_data;
 444         /* Iovecs for miscellaneous purposes */
 445 #define ISCSI_MISC_IOVECS                       5
 446         struct kvec             iov_misc[ISCSI_MISC_IOVECS];
 447         /* Array of struct iscsi_pdu used for DataPDUInOrder=No */
 448         struct iscsi_pdu        *pdu_list;
 449         /* Current struct iscsi_pdu used for DataPDUInOrder=No */
 450         struct iscsi_pdu        *pdu_ptr;
 451         /* Array of struct iscsi_seq used for DataSequenceInOrder=No */
 452         struct iscsi_seq        *seq_list;
 453         /* Current struct iscsi_seq used for DataSequenceInOrder=No */
 454         struct iscsi_seq        *seq_ptr;
 455         /* TMR Request when iscsi_opcode == ISCSI_OP_SCSI_TMFUNC */
 456         struct iscsi_tmr_req    *tmr_req;
 457         /* Connection this command is alligient to */
 458         struct iscsi_conn       *conn;
 459         /* Pointer to connection recovery entry */
 460         struct iscsi_conn_recovery *cr;
 461         /* Session the command is part of,  used for connection recovery */
 462         struct iscsi_session    *sess;
 463         /* list_head for connection list */
 464         struct list_head        i_conn_node;
 465         /* The TCM I/O descriptor that is accessed via container_of() */
 466         struct se_cmd           se_cmd;
 467         /* Sense buffer that will be mapped into outgoing status */
 468 #define ISCSI_SENSE_BUFFER_LEN          (TRANSPORT_SENSE_BUFFER + 2)
 469         unsigned char           sense_buffer[ISCSI_SENSE_BUFFER_LEN];
 470
 471         u32                     padding;
 472         u8                      pad_bytes[4];
 473
 474         struct scatterlist      *first_data_sg;
 475         u32                     first_data_sg_off;
 476         u32                     kmapped_nents;
 477
 478 }  ____cacheline_aligned;
 479
 480 struct iscsi_tmr_req {
 481         bool                    task_reassign:1;
 482         u32                     exp_data_sn;
 483         struct iscsi_cmd        *ref_cmd;
 484         struct iscsi_conn_recovery *conn_recovery;
 485         struct se_tmr_req       *se_tmr_req;
 486 };
 487
 488 struct iscsi_conn {
 489         /* Authentication Successful for this connection */
 490         u8                      auth_complete;
 491         /* State connection is currently in */
 492         u8                      conn_state;
 493         u8                      conn_logout_reason;
 494         u8                      network_transport;
 495         enum iscsi_timer_flags_table nopin_timer_flags;
 496         enum iscsi_timer_flags_table nopin_response_timer_flags;
 497         /* Used to know what thread encountered a transport failure */
 498         u8                      which_thread;
 499         /* connection id assigned by the Initiator */
 500         u16                     cid;
 501         /* Remote TCP Port */
 502         u16                     login_port;
 503         u16                     local_port;
 504         int                     net_size;
 505         u32                     auth_id;
 506         u32                     conn_flags;
 507         /* Used for iscsi_tx_login_rsp() */
 508         itt_t                   login_itt;
 509         u32                     exp_statsn;
 510         /* Per connection status sequence number */
 511         u32                     stat_sn;
 512         /* IFMarkInt's Current Value */
 513         u32                     if_marker;
 514         /* OFMarkInt's Current Value */
 515         u32                     of_marker;
 516         /* Used for calculating OFMarker offset to next PDU */
 517         u32                     of_marker_offset;
 518         /* Complete Bad PDU for sending reject */
 519         unsigned char           bad_hdr[ISCSI_HDR_LEN];
 520 #define IPV6_ADDRESS_SPACE                              48
 521         unsigned char           login_ip[IPV6_ADDRESS_SPACE];
 522         unsigned char           local_ip[IPV6_ADDRESS_SPACE];
 523         int                     conn_usage_count;
 524         int                     conn_waiting_on_uc;
 525         atomic_t                check_immediate_queue;
 526         atomic_t                conn_logout_remove;
 527         atomic_t                connection_exit;
 528         atomic_t                connection_recovery;
 529         atomic_t                connection_reinstatement;
 530         atomic_t                connection_wait_rcfr;
 531         atomic_t                sleep_on_conn_wait_comp;
 532         atomic_t                transport_failed;
 533         struct completion       conn_post_wait_comp;
 534         struct completion       conn_wait_comp;
 535         struct completion       conn_wait_rcfr_comp;
 536         struct completion       conn_waiting_on_uc_comp;
 537         struct completion       conn_logout_comp;
 538         struct completion       tx_half_close_comp;
 539         struct completion       rx_half_close_comp;
 540         /* socket used by this connection */
 541         struct socket           *sock;
 542         struct timer_list       nopin_timer;
 543         struct timer_list       nopin_response_timer;
 544         struct timer_list       transport_timer;
 545         /* Spinlock used for add/deleting cmd's from conn_cmd_list */
 546         spinlock_t              cmd_lock;
 547         spinlock_t              conn_usage_lock;
 548         spinlock_t              immed_queue_lock;
 549         spinlock_t              nopin_timer_lock;
 550         spinlock_t              response_queue_lock;
 551         spinlock_t              state_lock;
 552         /* libcrypto RX and TX contexts for crc32c */
 553         struct hash_desc        conn_rx_hash;
 554         struct hash_desc        conn_tx_hash;
 555         /* Used for scheduling TX and RX connection kthreads */
 556         cpumask_var_t           conn_cpumask;
 557         unsigned int            conn_rx_reset_cpumask:1;
 558         unsigned int            conn_tx_reset_cpumask:1;
 559         /* list_head of struct iscsi_cmd for this connection */
 560         struct list_head        conn_cmd_list;
 561         struct list_head        immed_queue_list;
 562         struct list_head        response_queue_list;
 563         struct iscsi_conn_ops   *conn_ops;
 564         struct iscsi_param_list *param_list;
 565         /* Used for per connection auth state machine */
 566         void                    *auth_protocol;
 567         struct iscsi_login_thread_s *login_thread;
 568         struct iscsi_portal_group *tpg;
 569         /* Pointer to parent session */
 570         struct iscsi_session    *sess;
 571         /* Pointer to thread_set in use for this conn's threads */
 572         struct iscsi_thread_set *thread_set;
 573         /* list_head for session connection list */
 574         struct list_head        conn_list;
 575 } ____cacheline_aligned;
 576
 577 struct iscsi_conn_recovery {
 578         u16                     cid;
 579         u32                     cmd_count;
 580         u32                     maxrecvdatasegmentlength;
 581         u32                     maxxmitdatasegmentlength;
 582         int                     ready_for_reallegiance;
 583         struct list_head        conn_recovery_cmd_list;
 584         spinlock_t              conn_recovery_cmd_lock;
 585         struct timer_list       time2retain_timer;
 586         struct iscsi_session    *sess;
 587         struct list_head        cr_list;
 588 }  ____cacheline_aligned;
 589
 590 struct iscsi_session {
 591         u8                      initiator_vendor;
 592         u8                      isid[6];
 593         enum iscsi_timer_flags_table time2retain_timer_flags;
 594         u8                      version_active;
 595         u16                     cid_called;
 596         u16                     conn_recovery_count;
 597         u16                     tsih;
 598         /* state session is currently in */
 599         u32                     session_state;
 600         /* session wide counter: initiator assigned task tag */
 601         itt_t                   init_task_tag;
 602         /* session wide counter: target assigned task tag */
 603         u32                     targ_xfer_tag;
 604         u32                     cmdsn_window;
 605
 606         /* protects cmdsn values */
 607         struct mutex            cmdsn_mutex;
 608         /* session wide counter: expected command sequence number */
 609         u32                     exp_cmd_sn;
 610         /* session wide counter: maximum allowed command sequence number */
 611         u32                     max_cmd_sn;
 612         struct list_head        sess_ooo_cmdsn_list;
 613
 614         /* LIO specific session ID */
 615         u32                     sid;
 616         char                    auth_type[8];
 617         /* unique within the target */
 618         int                     session_index;
 619         /* Used for session reference counting */
 620         int                     session_usage_count;
 621         int                     session_waiting_on_uc;
 622         u32                     cmd_pdus;
 623         u32                     rsp_pdus;
 624         u64                     tx_data_octets;
 625         u64                     rx_data_octets;
 626         u32                     conn_digest_errors;
 627         u32                     conn_timeout_errors;
 628         u64                     creation_time;
 629         spinlock_t              session_stats_lock;
 630         /* Number of active connections */
 631         atomic_t                nconn;
 632         atomic_t                session_continuation;
 633         atomic_t                session_fall_back_to_erl0;
 634         atomic_t                session_logout;
 635         atomic_t                session_reinstatement;
 636         atomic_t                session_stop_active;
 637         atomic_t                sleep_on_sess_wait_comp;
 638         /* connection list */
 639         struct list_head        sess_conn_list;
 640         struct list_head        cr_active_list;
 641         struct list_head        cr_inactive_list;
 642         spinlock_t              conn_lock;
 643         spinlock_t              cr_a_lock;
 644         spinlock_t              cr_i_lock;
 645         spinlock_t              session_usage_lock;
 646         spinlock_t              ttt_lock;
 647         struct completion       async_msg_comp;
 648         struct completion       reinstatement_comp;
 649         struct completion       session_wait_comp;
 650         struct completion       session_waiting_on_uc_comp;
 651         struct timer_list       time2retain_timer;
 652         struct iscsi_sess_ops   *sess_ops;
 653         struct se_session       *se_sess;
 654         struct iscsi_portal_group *tpg;
 655 } ____cacheline_aligned;
 656
 657 struct iscsi_login {
 658         u8 auth_complete;
 659         u8 checked_for_existing;
 660         u8 current_stage;
 661         u8 leading_connection;
 662         u8 first_request;
 663         u8 version_min;
 664         u8 version_max;
 665         char isid[6];
 666         u32 cmd_sn;
 667         itt_t init_task_tag;
 668         u32 initial_exp_statsn;
 669         u32 rsp_length;
 670         u16 cid;
 671         u16 tsih;
 672         char *req;
 673         char *rsp;
 674         char *req_buf;
 675         char *rsp_buf;
 676 } ____cacheline_aligned;
 677
 678 struct iscsi_node_attrib {
 679         u32                     dataout_timeout;
 680         u32                     dataout_timeout_retries;
 681         u32                     default_erl;
 682         u32                     nopin_timeout;
 683         u32                     nopin_response_timeout;
 684         u32                     random_datain_pdu_offsets;
 685         u32                     random_datain_seq_offsets;
 686         u32                     random_r2t_offsets;
 687         u32                     tmr_cold_reset;
 688         u32                     tmr_warm_reset;
 689         struct iscsi_node_acl *nacl;
 690 };
 691
 692 struct se_dev_entry_s;
 693
 694 struct iscsi_node_auth {
 695         enum naf_flags_table    naf_flags;
 696         int                     authenticate_target;
 697         /* Used for iscsit_global->discovery_auth,
 698          * set to zero (auth disabled) by default */
 699         int                     enforce_discovery_auth;
 700 #define MAX_USER_LEN                            256
 701 #define MAX_PASS_LEN                            256
 702         char                    userid[MAX_USER_LEN];
 703         char                    password[MAX_PASS_LEN];
 704         char                    userid_mutual[MAX_USER_LEN];
 705         char                    password_mutual[MAX_PASS_LEN];
 706 };
 707
 708 #include "iscsi_target_stat.h"
 709
 710 struct iscsi_node_stat_grps {
 711         struct config_group     iscsi_sess_stats_group;
 712         struct config_group     iscsi_conn_stats_group;
 713 };
 714
 715 struct iscsi_node_acl {
 716         struct iscsi_node_attrib node_attrib;
 717         struct iscsi_node_auth  node_auth;
 718         struct iscsi_node_stat_grps node_stat_grps;
 719         struct se_node_acl      se_node_acl;
 720 };
 721
 722 #define NODE_STAT_GRPS(nacl)    (&(nacl)->node_stat_grps)
 723
 724 #define ISCSI_NODE_ATTRIB(t)    (&(t)->node_attrib)
 725 #define ISCSI_NODE_AUTH(t)      (&(t)->node_auth)
 726
 727 struct iscsi_tpg_attrib {
 728         u32                     authentication;
 729         u32                     login_timeout;
 730         u32                     netif_timeout;
 731         u32                     generate_node_acls;
 732         u32                     cache_dynamic_acls;
 733         u32                     default_cmdsn_depth;
 734         u32                     demo_mode_write_protect;
 735         u32                     prod_mode_write_protect;
 736         struct iscsi_portal_group *tpg;
 737 };
 738
 739 struct iscsi_np {
 740         int                     np_network_transport;
 741         int                     np_ip_proto;
 742         int                     np_sock_type;
 743         enum np_thread_state_table np_thread_state;
 744         enum iscsi_timer_flags_table np_login_timer_flags;
 745         u32                     np_exports;
 746         enum np_flags_table     np_flags;
 747         unsigned char           np_ip[IPV6_ADDRESS_SPACE];
 748         u16                     np_port;
 749         spinlock_t              np_thread_lock;
 750         struct completion       np_restart_comp;
 751         struct socket           *np_socket;
 752         struct __kernel_sockaddr_storage np_sockaddr;
 753         struct task_struct      *np_thread;
 754         struct timer_list       np_login_timer;
 755         struct iscsi_portal_group *np_login_tpg;
 756         struct list_head        np_list;
 757 } ____cacheline_aligned;
 758
 759 struct iscsi_tpg_np {
 760         struct iscsi_np         *tpg_np;
 761         struct iscsi_portal_group *tpg;
 762         struct iscsi_tpg_np     *tpg_np_parent;
 763         struct list_head        tpg_np_list;
 764         struct list_head        tpg_np_child_list;
 765         struct list_head        tpg_np_parent_list;
 766         struct se_tpg_np        se_tpg_np;
 767         spinlock_t              tpg_np_parent_lock;
 768 };
 769
 770 struct iscsi_portal_group {
 771         unsigned char           tpg_chap_id;
 772         /* TPG State */
 773         enum tpg_state_table    tpg_state;
 774         /* Target Portal Group Tag */
 775         u16                     tpgt;
 776         /* Id assigned to target sessions */
 777         u16                     ntsih;
 778         /* Number of active sessions */
 779         u32                     nsessions;
 780         /* Number of Network Portals available for this TPG */
 781         u32                     num_tpg_nps;
 782         /* Per TPG LIO specific session ID. */
 783         u32                     sid;
 784         /* Spinlock for adding/removing Network Portals */
 785         spinlock_t              tpg_np_lock;
 786         spinlock_t              tpg_state_lock;
 787         struct se_portal_group tpg_se_tpg;
 788         struct mutex            tpg_access_lock;
 789         struct mutex            np_login_lock;
 790         struct iscsi_tpg_attrib tpg_attrib;
 791         /* Pointer to default list of iSCSI parameters for TPG */
 792         struct iscsi_param_list *param_list;
 793         struct iscsi_tiqn       *tpg_tiqn;
 794         struct list_head        tpg_gnp_list;
 795         struct list_head        tpg_list;
 796 } ____cacheline_aligned;
 797
 798 #define ISCSI_TPG_C(c)          ((struct iscsi_portal_group *)(c)->tpg)
 799 #define ISCSI_TPG_LUN(c, l)  ((iscsi_tpg_list_t *)(c)->tpg->tpg_lun_list_t[l])
 800 #define ISCSI_TPG_S(s)          ((struct iscsi_portal_group *)(s)->tpg)
 801 #define ISCSI_TPG_ATTRIB(t)     (&(t)->tpg_attrib)
 802 #define SE_TPG(tpg)             (&(tpg)->tpg_se_tpg)
 803
 804 struct iscsi_wwn_stat_grps {
 805         struct config_group     iscsi_stat_group;
 806         struct config_group     iscsi_instance_group;
 807         struct config_group     iscsi_sess_err_group;
 808         struct config_group     iscsi_tgt_attr_group;
 809         struct config_group     iscsi_login_stats_group;
 810         struct config_group     iscsi_logout_stats_group;
 811 };
 812
 813 struct iscsi_tiqn {
 814 #define ISCSI_IQN_LEN                           224
 815         unsigned char           tiqn[ISCSI_IQN_LEN];
 816         enum tiqn_state_table   tiqn_state;
 817         int                     tiqn_access_count;
 818         u32                     tiqn_active_tpgs;
 819         u32                     tiqn_ntpgs;
 820         u32                     tiqn_num_tpg_nps;
 821         u32                     tiqn_nsessions;
 822         struct list_head        tiqn_list;
 823         struct list_head        tiqn_tpg_list;
 824         spinlock_t              tiqn_state_lock;
 825         spinlock_t              tiqn_tpg_lock;
 826         struct se_wwn           tiqn_wwn;
 827         struct iscsi_wwn_stat_grps tiqn_stat_grps;
 828         int                     tiqn_index;
 829         struct iscsi_sess_err_stats  sess_err_stats;
 830         struct iscsi_login_stats     login_stats;
 831         struct iscsi_logout_stats    logout_stats;
 832 } ____cacheline_aligned;
 833
 834 #define WWN_STAT_GRPS(tiqn)     (&(tiqn)->tiqn_stat_grps)
 835
 836 struct iscsit_global {
 837         /* In core shutdown */
 838         u32                     in_shutdown;
 839         u32                     active_ts;
 840         /* Unique identifier used for the authentication daemon */
 841         u32                     auth_id;
 842         u32                     inactive_ts;
 843         /* Thread Set bitmap count */
 844         int                     ts_bitmap_count;
 845         /* Thread Set bitmap pointer */
 846         unsigned long           *ts_bitmap;
 847         /* Used for iSCSI discovery session authentication */
 848         struct iscsi_node_acl   discovery_acl;
 849         struct iscsi_portal_group       *discovery_tpg;
 850 };
 851
 852 #endif /* ISCSI_TARGET_CORE_H */