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 u8 OFMarker; /* [0,1] == [No,Yes] */ 243 u8 IFMarker; /* [0,1] == [No,Yes] */ 244 u32 OFMarkInt; /* [1..65535] */ 245 u32 IFMarkInt; /* [1..65535] */ 246 }; 247 248 struct iscsi_sess_ops { 249 char InitiatorName[224]; 250 char InitiatorAlias[256]; 251 char TargetName[224]; 252 char TargetAlias[256]; 253 char TargetAddress[256]; 254 u16 TargetPortalGroupTag; /* [0..65535] */ 255 u16 MaxConnections; /* [1..65535] */ 256 u8 InitialR2T; /* [0,1] == [No,Yes] */ 257 u8 ImmediateData; /* [0,1] == [No,Yes] */ 258 u32 MaxBurstLength; /* [512..2**24-1] */ 259 u32 FirstBurstLength; /* [512..2**24-1] */ 260 u16 DefaultTime2Wait; /* [0..3600] */ 261 u16 DefaultTime2Retain; /* [0..3600] */ 262 u16 MaxOutstandingR2T; /* [1..65535] */ 263 u8 DataPDUInOrder; /* [0,1] == [No,Yes] */ 264 u8 DataSequenceInOrder; /* [0,1] == [No,Yes] */ 265 u8 ErrorRecoveryLevel; /* [0..2] */ 266 u8 SessionType; /* [0,1] == [Normal,Discovery]*/ 267 }; 268 269 struct iscsi_queue_req { 270 int state; 271 struct iscsi_cmd *cmd; 272 struct list_head qr_list; 273 }; 274 275 struct iscsi_data_count { 276 int data_length; 277 int sync_and_steering; 278 enum data_count_type type; 279 u32 iov_count; 280 u32 ss_iov_count; 281 u32 ss_marker_count; 282 struct kvec *iov; 283 }; 284 285 struct iscsi_param_list { 286 struct list_head param_list; 287 struct list_head extra_response_list; 288 }; 289 290 struct iscsi_datain_req { 291 enum datain_req_comp_table dr_complete; 292 int generate_recovery_values; 293 enum datain_req_rec_table recovery; 294 u32 begrun; 295 u32 runlength; 296 u32 data_length; 297 u32 data_offset; 298 u32 data_offset_end; 299 u32 data_sn; 300 u32 next_burst_len; 301 u32 read_data_done; 302 u32 seq_send_order; 303 struct list_head dr_list; 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 u32 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 /* Total size in bytes associated with command */ 384 u32 data_length; 385 /* Counter for MaxOutstandingR2T */ 386 u32 outstanding_r2ts; 387 /* Next R2T Offset when DataSequenceInOrder=Yes */ 388 u32 r2t_offset; 389 /* Iovec current and orig count for iscsi_cmd->iov_data */ 390 u32 iov_data_count; 391 u32 orig_iov_data_count; 392 /* Number of miscellaneous iovecs used for IP stack calls */ 393 u32 iov_misc_count; 394 /* Number of struct iscsi_pdu in struct iscsi_cmd->pdu_list */ 395 u32 pdu_count; 396 /* Next struct iscsi_pdu to send in struct iscsi_cmd->pdu_list */ 397 u32 pdu_send_order; 398 /* Current struct iscsi_pdu in struct iscsi_cmd->pdu_list */ 399 u32 pdu_start; 400 /* Next struct iscsi_seq to send in struct iscsi_cmd->seq_list */ 401 u32 seq_send_order; 402 /* Number of struct iscsi_seq in struct iscsi_cmd->seq_list */ 403 u32 seq_count; 404 /* Current struct iscsi_seq in struct iscsi_cmd->seq_list */ 405 u32 seq_no; 406 /* Lowest offset in current DataOUT sequence */ 407 u32 seq_start_offset; 408 /* Highest offset in current DataOUT sequence */ 409 u32 seq_end_offset; 410 /* Total size in bytes received so far of READ data */ 411 u32 read_data_done; 412 /* Total size in bytes received so far of WRITE data */ 413 u32 write_data_done; 414 /* Counter for FirstBurstLength key */ 415 u32 first_burst_len; 416 /* Counter for MaxBurstLength key */ 417 u32 next_burst_len; 418 /* Transfer size used for IP stack calls */ 419 u32 tx_size; 420 /* Buffer used for various purposes */ 421 void *buf_ptr; 422 /* See include/linux/dma-mapping.h */ 423 enum dma_data_direction data_direction; 424 /* iSCSI PDU Header + CRC */ 425 unsigned char pdu[ISCSI_HDR_LEN + ISCSI_CRC_LEN]; 426 /* Number of times struct iscsi_cmd is present in immediate queue */ 427 atomic_t immed_queue_count; 428 atomic_t response_queue_count; 429 spinlock_t datain_lock; 430 spinlock_t dataout_timeout_lock; 431 /* spinlock for protecting struct iscsi_cmd->i_state */ 432 spinlock_t istate_lock; 433 /* spinlock for adding within command recovery entries */ 434 spinlock_t error_lock; 435 /* spinlock for adding R2Ts */ 436 spinlock_t r2t_lock; 437 /* DataIN List */ 438 struct list_head datain_list; 439 /* R2T List */ 440 struct list_head cmd_r2t_list; 441 struct completion reject_comp; 442 /* Timer for DataOUT */ 443 struct timer_list dataout_timer; 444 /* Iovecs for SCSI data payload RX/TX w/ kernel level sockets */ 445 struct kvec *iov_data; 446 /* Iovecs for miscellaneous purposes */ 447 #define ISCSI_MISC_IOVECS 5 448 struct kvec iov_misc[ISCSI_MISC_IOVECS]; 449 /* Array of struct iscsi_pdu used for DataPDUInOrder=No */ 450 struct iscsi_pdu *pdu_list; 451 /* Current struct iscsi_pdu used for DataPDUInOrder=No */ 452 struct iscsi_pdu *pdu_ptr; 453 /* Array of struct iscsi_seq used for DataSequenceInOrder=No */ 454 struct iscsi_seq *seq_list; 455 /* Current struct iscsi_seq used for DataSequenceInOrder=No */ 456 struct iscsi_seq *seq_ptr; 457 /* TMR Request when iscsi_opcode == ISCSI_OP_SCSI_TMFUNC */ 458 struct iscsi_tmr_req *tmr_req; 459 /* Connection this command is alligient to */ 460 struct iscsi_conn *conn; 461 /* Pointer to connection recovery entry */ 462 struct iscsi_conn_recovery *cr; 463 /* Session the command is part of, used for connection recovery */ 464 struct iscsi_session *sess; 465 /* list_head for connection list */ 466 struct list_head i_list; 467 /* The TCM I/O descriptor that is accessed via container_of() */ 468 struct se_cmd se_cmd; 469 /* Sense buffer that will be mapped into outgoing status */ 470 #define ISCSI_SENSE_BUFFER_LEN (TRANSPORT_SENSE_BUFFER + 2) 471 unsigned char sense_buffer[ISCSI_SENSE_BUFFER_LEN]; 472 473 struct scatterlist *t_mem_sg; 474 u32 t_mem_sg_nents; 475 476 u32 padding; 477 u8 pad_bytes[4]; 478 479 struct scatterlist *first_data_sg; 480 u32 first_data_sg_off; 481 u32 kmapped_nents; 482 483 } ____cacheline_aligned; 484 485 struct iscsi_tmr_req { 486 bool task_reassign:1; 487 u32 ref_cmd_sn; 488 u32 exp_data_sn; 489 struct iscsi_conn_recovery *conn_recovery; 490 struct se_tmr_req *se_tmr_req; 491 }; 492 493 struct iscsi_conn { 494 wait_queue_head_t queues_wq; 495 /* Authentication Successful for this connection */ 496 u8 auth_complete; 497 /* State connection is currently in */ 498 u8 conn_state; 499 u8 conn_logout_reason; 500 u8 network_transport; 501 enum iscsi_timer_flags_table nopin_timer_flags; 502 enum iscsi_timer_flags_table nopin_response_timer_flags; 503 u8 tx_immediate_queue; 504 u8 tx_response_queue; 505 /* Used to know what thread encountered a transport failure */ 506 u8 which_thread; 507 /* connection id assigned by the Initiator */ 508 u16 cid; 509 /* Remote TCP Port */ 510 u16 login_port; 511 u16 local_port; 512 int net_size; 513 u32 auth_id; 514 u32 conn_flags; 515 /* Used for iscsi_tx_login_rsp() */ 516 u32 login_itt; 517 u32 exp_statsn; 518 /* Per connection status sequence number */ 519 u32 stat_sn; 520 /* IFMarkInt's Current Value */ 521 u32 if_marker; 522 /* OFMarkInt's Current Value */ 523 u32 of_marker; 524 /* Used for calculating OFMarker offset to next PDU */ 525 u32 of_marker_offset; 526 /* Complete Bad PDU for sending reject */ 527 unsigned char bad_hdr[ISCSI_HDR_LEN]; 528 #define IPV6_ADDRESS_SPACE 48 529 unsigned char login_ip[IPV6_ADDRESS_SPACE]; 530 unsigned char local_ip[IPV6_ADDRESS_SPACE]; 531 int conn_usage_count; 532 int conn_waiting_on_uc; 533 atomic_t check_immediate_queue; 534 atomic_t conn_logout_remove; 535 atomic_t connection_exit; 536 atomic_t connection_recovery; 537 atomic_t connection_reinstatement; 538 atomic_t connection_wait_rcfr; 539 atomic_t sleep_on_conn_wait_comp; 540 atomic_t transport_failed; 541 struct completion conn_post_wait_comp; 542 struct completion conn_wait_comp; 543 struct completion conn_wait_rcfr_comp; 544 struct completion conn_waiting_on_uc_comp; 545 struct completion conn_logout_comp; 546 struct completion tx_half_close_comp; 547 struct completion rx_half_close_comp; 548 /* socket used by this connection */ 549 struct socket *sock; 550 struct timer_list nopin_timer; 551 struct timer_list nopin_response_timer; 552 struct timer_list transport_timer; 553 /* Spinlock used for add/deleting cmd's from conn_cmd_list */ 554 spinlock_t cmd_lock; 555 spinlock_t conn_usage_lock; 556 spinlock_t immed_queue_lock; 557 spinlock_t nopin_timer_lock; 558 spinlock_t response_queue_lock; 559 spinlock_t state_lock; 560 /* libcrypto RX and TX contexts for crc32c */ 561 struct hash_desc conn_rx_hash; 562 struct hash_desc conn_tx_hash; 563 /* Used for scheduling TX and RX connection kthreads */ 564 cpumask_var_t conn_cpumask; 565 unsigned int conn_rx_reset_cpumask:1; 566 unsigned int conn_tx_reset_cpumask:1; 567 /* list_head of struct iscsi_cmd for this connection */ 568 struct list_head conn_cmd_list; 569 struct list_head immed_queue_list; 570 struct list_head response_queue_list; 571 struct iscsi_conn_ops *conn_ops; 572 struct iscsi_param_list *param_list; 573 /* Used for per connection auth state machine */ 574 void *auth_protocol; 575 struct iscsi_login_thread_s *login_thread; 576 struct iscsi_portal_group *tpg; 577 /* Pointer to parent session */ 578 struct iscsi_session *sess; 579 /* Pointer to thread_set in use for this conn's threads */ 580 struct iscsi_thread_set *thread_set; 581 /* list_head for session connection list */ 582 struct list_head conn_list; 583 } ____cacheline_aligned; 584 585 struct iscsi_conn_recovery { 586 u16 cid; 587 u32 cmd_count; 588 u32 maxrecvdatasegmentlength; 589 int ready_for_reallegiance; 590 struct list_head conn_recovery_cmd_list; 591 spinlock_t conn_recovery_cmd_lock; 592 struct timer_list time2retain_timer; 593 struct iscsi_session *sess; 594 struct list_head cr_list; 595 } ____cacheline_aligned; 596 597 struct iscsi_session { 598 u8 initiator_vendor; 599 u8 isid[6]; 600 enum iscsi_timer_flags_table time2retain_timer_flags; 601 u8 version_active; 602 u16 cid_called; 603 u16 conn_recovery_count; 604 u16 tsih; 605 /* state session is currently in */ 606 u32 session_state; 607 /* session wide counter: initiator assigned task tag */ 608 u32 init_task_tag; 609 /* session wide counter: target assigned task tag */ 610 u32 targ_xfer_tag; 611 u32 cmdsn_window; 612 613 /* protects cmdsn values */ 614 struct mutex cmdsn_mutex; 615 /* session wide counter: expected command sequence number */ 616 u32 exp_cmd_sn; 617 /* session wide counter: maximum allowed command sequence number */ 618 u32 max_cmd_sn; 619 struct list_head sess_ooo_cmdsn_list; 620 621 /* LIO specific session ID */ 622 u32 sid; 623 char auth_type[8]; 624 /* unique within the target */ 625 int session_index; 626 /* Used for session reference counting */ 627 int session_usage_count; 628 int session_waiting_on_uc; 629 u32 cmd_pdus; 630 u32 rsp_pdus; 631 u64 tx_data_octets; 632 u64 rx_data_octets; 633 u32 conn_digest_errors; 634 u32 conn_timeout_errors; 635 u64 creation_time; 636 spinlock_t session_stats_lock; 637 /* Number of active connections */ 638 atomic_t nconn; 639 atomic_t session_continuation; 640 atomic_t session_fall_back_to_erl0; 641 atomic_t session_logout; 642 atomic_t session_reinstatement; 643 atomic_t session_stop_active; 644 atomic_t sleep_on_sess_wait_comp; 645 /* connection list */ 646 struct list_head sess_conn_list; 647 struct list_head cr_active_list; 648 struct list_head cr_inactive_list; 649 spinlock_t conn_lock; 650 spinlock_t cr_a_lock; 651 spinlock_t cr_i_lock; 652 spinlock_t session_usage_lock; 653 spinlock_t ttt_lock; 654 struct completion async_msg_comp; 655 struct completion reinstatement_comp; 656 struct completion session_wait_comp; 657 struct completion session_waiting_on_uc_comp; 658 struct timer_list time2retain_timer; 659 struct iscsi_sess_ops *sess_ops; 660 struct se_session *se_sess; 661 struct iscsi_portal_group *tpg; 662 } ____cacheline_aligned; 663 664 struct iscsi_login { 665 u8 auth_complete; 666 u8 checked_for_existing; 667 u8 current_stage; 668 u8 leading_connection; 669 u8 first_request; 670 u8 version_min; 671 u8 version_max; 672 char isid[6]; 673 u32 cmd_sn; 674 u32 init_task_tag; 675 u32 initial_exp_statsn; 676 u32 rsp_length; 677 u16 cid; 678 u16 tsih; 679 char *req; 680 char *rsp; 681 char *req_buf; 682 char *rsp_buf; 683 } ____cacheline_aligned; 684 685 struct iscsi_node_attrib { 686 u32 dataout_timeout; 687 u32 dataout_timeout_retries; 688 u32 default_erl; 689 u32 nopin_timeout; 690 u32 nopin_response_timeout; 691 u32 random_datain_pdu_offsets; 692 u32 random_datain_seq_offsets; 693 u32 random_r2t_offsets; 694 u32 tmr_cold_reset; 695 u32 tmr_warm_reset; 696 struct iscsi_node_acl *nacl; 697 }; 698 699 struct se_dev_entry_s; 700 701 struct iscsi_node_auth { 702 enum naf_flags_table naf_flags; 703 int authenticate_target; 704 /* Used for iscsit_global->discovery_auth, 705 * set to zero (auth disabled) by default */ 706 int enforce_discovery_auth; 707 #define MAX_USER_LEN 256 708 #define MAX_PASS_LEN 256 709 char userid[MAX_USER_LEN]; 710 char password[MAX_PASS_LEN]; 711 char userid_mutual[MAX_USER_LEN]; 712 char password_mutual[MAX_PASS_LEN]; 713 }; 714 715 #include "iscsi_target_stat.h" 716 717 struct iscsi_node_stat_grps { 718 struct config_group iscsi_sess_stats_group; 719 struct config_group iscsi_conn_stats_group; 720 }; 721 722 struct iscsi_node_acl { 723 struct iscsi_node_attrib node_attrib; 724 struct iscsi_node_auth node_auth; 725 struct iscsi_node_stat_grps node_stat_grps; 726 struct se_node_acl se_node_acl; 727 }; 728 729 #define NODE_STAT_GRPS(nacl) (&(nacl)->node_stat_grps) 730 731 #define ISCSI_NODE_ATTRIB(t) (&(t)->node_attrib) 732 #define ISCSI_NODE_AUTH(t) (&(t)->node_auth) 733 734 struct iscsi_tpg_attrib { 735 u32 authentication; 736 u32 login_timeout; 737 u32 netif_timeout; 738 u32 generate_node_acls; 739 u32 cache_dynamic_acls; 740 u32 default_cmdsn_depth; 741 u32 demo_mode_write_protect; 742 u32 prod_mode_write_protect; 743 struct iscsi_portal_group *tpg; 744 }; 745 746 struct iscsi_np { 747 int np_network_transport; 748 int np_ip_proto; 749 int np_sock_type; 750 enum np_thread_state_table np_thread_state; 751 enum iscsi_timer_flags_table np_login_timer_flags; 752 u32 np_exports; 753 enum np_flags_table np_flags; 754 unsigned char np_ip[IPV6_ADDRESS_SPACE]; 755 u16 np_port; 756 spinlock_t np_thread_lock; 757 struct completion np_restart_comp; 758 struct socket *np_socket; 759 struct __kernel_sockaddr_storage np_sockaddr; 760 struct task_struct *np_thread; 761 struct timer_list np_login_timer; 762 struct iscsi_portal_group *np_login_tpg; 763 struct list_head np_list; 764 } ____cacheline_aligned; 765 766 struct iscsi_tpg_np { 767 struct iscsi_np *tpg_np; 768 struct iscsi_portal_group *tpg; 769 struct iscsi_tpg_np *tpg_np_parent; 770 struct list_head tpg_np_list; 771 struct list_head tpg_np_child_list; 772 struct list_head tpg_np_parent_list; 773 struct se_tpg_np se_tpg_np; 774 spinlock_t tpg_np_parent_lock; 775 }; 776 777 struct iscsi_portal_group { 778 unsigned char tpg_chap_id; 779 /* TPG State */ 780 enum tpg_state_table tpg_state; 781 /* Target Portal Group Tag */ 782 u16 tpgt; 783 /* Id assigned to target sessions */ 784 u16 ntsih; 785 /* Number of active sessions */ 786 u32 nsessions; 787 /* Number of Network Portals available for this TPG */ 788 u32 num_tpg_nps; 789 /* Per TPG LIO specific session ID. */ 790 u32 sid; 791 /* Spinlock for adding/removing Network Portals */ 792 spinlock_t tpg_np_lock; 793 spinlock_t tpg_state_lock; 794 struct se_portal_group tpg_se_tpg; 795 struct mutex tpg_access_lock; 796 struct mutex np_login_lock; 797 struct iscsi_tpg_attrib tpg_attrib; 798 /* Pointer to default list of iSCSI parameters for TPG */ 799 struct iscsi_param_list *param_list; 800 struct iscsi_tiqn *tpg_tiqn; 801 struct list_head tpg_gnp_list; 802 struct list_head tpg_list; 803 } ____cacheline_aligned; 804 805 #define ISCSI_TPG_C(c) ((struct iscsi_portal_group *)(c)->tpg) 806 #define ISCSI_TPG_LUN(c, l) ((iscsi_tpg_list_t *)(c)->tpg->tpg_lun_list_t[l]) 807 #define ISCSI_TPG_S(s) ((struct iscsi_portal_group *)(s)->tpg) 808 #define ISCSI_TPG_ATTRIB(t) (&(t)->tpg_attrib) 809 #define SE_TPG(tpg) (&(tpg)->tpg_se_tpg) 810 811 struct iscsi_wwn_stat_grps { 812 struct config_group iscsi_stat_group; 813 struct config_group iscsi_instance_group; 814 struct config_group iscsi_sess_err_group; 815 struct config_group iscsi_tgt_attr_group; 816 struct config_group iscsi_login_stats_group; 817 struct config_group iscsi_logout_stats_group; 818 }; 819 820 struct iscsi_tiqn { 821 #define ISCSI_IQN_LEN 224 822 unsigned char tiqn[ISCSI_IQN_LEN]; 823 enum tiqn_state_table tiqn_state; 824 int tiqn_access_count; 825 u32 tiqn_active_tpgs; 826 u32 tiqn_ntpgs; 827 u32 tiqn_num_tpg_nps; 828 u32 tiqn_nsessions; 829 struct list_head tiqn_list; 830 struct list_head tiqn_tpg_list; 831 spinlock_t tiqn_state_lock; 832 spinlock_t tiqn_tpg_lock; 833 struct se_wwn tiqn_wwn; 834 struct iscsi_wwn_stat_grps tiqn_stat_grps; 835 int tiqn_index; 836 struct iscsi_sess_err_stats sess_err_stats; 837 struct iscsi_login_stats login_stats; 838 struct iscsi_logout_stats logout_stats; 839 } ____cacheline_aligned; 840 841 #define WWN_STAT_GRPS(tiqn) (&(tiqn)->tiqn_stat_grps) 842 843 struct iscsit_global { 844 /* In core shutdown */ 845 u32 in_shutdown; 846 u32 active_ts; 847 /* Unique identifier used for the authentication daemon */ 848 u32 auth_id; 849 u32 inactive_ts; 850 /* Thread Set bitmap count */ 851 int ts_bitmap_count; 852 /* Thread Set bitmap pointer */ 853 unsigned long *ts_bitmap; 854 /* Used for iSCSI discovery session authentication */ 855 struct iscsi_node_acl discovery_acl; 856 struct iscsi_portal_group *discovery_tpg; 857 }; 858 859 #endif /* ISCSI_TARGET_CORE_H */ 860