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/iscsi_proto.h> 9 #include <target/target_core_base.h> 10 11 #define ISCSIT_VERSION "v4.1.0" 12 #define ISCSI_MAX_DATASN_MISSING_COUNT 16 13 #define ISCSI_TX_THREAD_TCP_TIMEOUT 2 14 #define ISCSI_RX_THREAD_TCP_TIMEOUT 2 15 #define SECONDS_FOR_ASYNC_LOGOUT 10 16 #define SECONDS_FOR_ASYNC_TEXT 10 17 #define SECONDS_FOR_LOGOUT_COMP 15 18 #define WHITE_SPACE " \t\v\f\n\r" 19 #define ISCSIT_MIN_TAGS 16 20 #define ISCSIT_EXTRA_TAGS 8 21 #define ISCSIT_TCP_BACKLOG 256 22 #define ISCSI_RX_THREAD_NAME "iscsi_trx" 23 #define ISCSI_TX_THREAD_NAME "iscsi_ttx" 24 25 /* struct iscsi_node_attrib sanity values */ 26 #define NA_DATAOUT_TIMEOUT 3 27 #define NA_DATAOUT_TIMEOUT_MAX 60 28 #define NA_DATAOUT_TIMEOUT_MIX 2 29 #define NA_DATAOUT_TIMEOUT_RETRIES 5 30 #define NA_DATAOUT_TIMEOUT_RETRIES_MAX 15 31 #define NA_DATAOUT_TIMEOUT_RETRIES_MIN 1 32 #define NA_NOPIN_TIMEOUT 15 33 #define NA_NOPIN_TIMEOUT_MAX 60 34 #define NA_NOPIN_TIMEOUT_MIN 3 35 #define NA_NOPIN_RESPONSE_TIMEOUT 30 36 #define NA_NOPIN_RESPONSE_TIMEOUT_MAX 60 37 #define NA_NOPIN_RESPONSE_TIMEOUT_MIN 3 38 #define NA_RANDOM_DATAIN_PDU_OFFSETS 0 39 #define NA_RANDOM_DATAIN_SEQ_OFFSETS 0 40 #define NA_RANDOM_R2T_OFFSETS 0 41 42 /* struct iscsi_tpg_attrib sanity values */ 43 #define TA_AUTHENTICATION 1 44 #define TA_LOGIN_TIMEOUT 15 45 #define TA_LOGIN_TIMEOUT_MAX 30 46 #define TA_LOGIN_TIMEOUT_MIN 5 47 #define TA_NETIF_TIMEOUT 2 48 #define TA_NETIF_TIMEOUT_MAX 15 49 #define TA_NETIF_TIMEOUT_MIN 2 50 #define TA_GENERATE_NODE_ACLS 0 51 #define TA_DEFAULT_CMDSN_DEPTH 64 52 #define TA_DEFAULT_CMDSN_DEPTH_MAX 512 53 #define TA_DEFAULT_CMDSN_DEPTH_MIN 1 54 #define TA_CACHE_DYNAMIC_ACLS 0 55 /* Enabled by default in demo mode (generic_node_acls=1) */ 56 #define TA_DEMO_MODE_WRITE_PROTECT 1 57 /* Disabled by default in production mode w/ explict ACLs */ 58 #define TA_PROD_MODE_WRITE_PROTECT 0 59 #define TA_DEMO_MODE_DISCOVERY 1 60 #define TA_DEFAULT_ERL 0 61 #define TA_CACHE_CORE_NPS 0 62 /* T10 protection information disabled by default */ 63 #define TA_DEFAULT_T10_PI 0 64 #define TA_DEFAULT_FABRIC_PROT_TYPE 0 65 66 #define ISCSI_IOV_DATA_BUFFER 5 67 68 enum iscsit_transport_type { 69 ISCSI_TCP = 0, 70 ISCSI_SCTP_TCP = 1, 71 ISCSI_SCTP_UDP = 2, 72 ISCSI_IWARP_TCP = 3, 73 ISCSI_IWARP_SCTP = 4, 74 ISCSI_INFINIBAND = 5, 75 }; 76 77 /* RFC-3720 7.1.4 Standard Connection State Diagram for a Target */ 78 enum target_conn_state_table { 79 TARG_CONN_STATE_FREE = 0x1, 80 TARG_CONN_STATE_XPT_UP = 0x3, 81 TARG_CONN_STATE_IN_LOGIN = 0x4, 82 TARG_CONN_STATE_LOGGED_IN = 0x5, 83 TARG_CONN_STATE_IN_LOGOUT = 0x6, 84 TARG_CONN_STATE_LOGOUT_REQUESTED = 0x7, 85 TARG_CONN_STATE_CLEANUP_WAIT = 0x8, 86 }; 87 88 /* RFC-3720 7.3.2 Session State Diagram for a Target */ 89 enum target_sess_state_table { 90 TARG_SESS_STATE_FREE = 0x1, 91 TARG_SESS_STATE_ACTIVE = 0x2, 92 TARG_SESS_STATE_LOGGED_IN = 0x3, 93 TARG_SESS_STATE_FAILED = 0x4, 94 TARG_SESS_STATE_IN_CONTINUE = 0x5, 95 }; 96 97 /* struct iscsi_data_count->type */ 98 enum data_count_type { 99 ISCSI_RX_DATA = 1, 100 ISCSI_TX_DATA = 2, 101 }; 102 103 /* struct iscsi_datain_req->dr_complete */ 104 enum datain_req_comp_table { 105 DATAIN_COMPLETE_NORMAL = 1, 106 DATAIN_COMPLETE_WITHIN_COMMAND_RECOVERY = 2, 107 DATAIN_COMPLETE_CONNECTION_RECOVERY = 3, 108 }; 109 110 /* struct iscsi_datain_req->recovery */ 111 enum datain_req_rec_table { 112 DATAIN_WITHIN_COMMAND_RECOVERY = 1, 113 DATAIN_CONNECTION_RECOVERY = 2, 114 }; 115 116 /* struct iscsi_portal_group->state */ 117 enum tpg_state_table { 118 TPG_STATE_FREE = 0, 119 TPG_STATE_ACTIVE = 1, 120 TPG_STATE_INACTIVE = 2, 121 TPG_STATE_COLD_RESET = 3, 122 }; 123 124 /* struct iscsi_tiqn->tiqn_state */ 125 enum tiqn_state_table { 126 TIQN_STATE_ACTIVE = 1, 127 TIQN_STATE_SHUTDOWN = 2, 128 }; 129 130 /* struct iscsi_cmd->cmd_flags */ 131 enum cmd_flags_table { 132 ICF_GOT_LAST_DATAOUT = 0x00000001, 133 ICF_GOT_DATACK_SNACK = 0x00000002, 134 ICF_NON_IMMEDIATE_UNSOLICITED_DATA = 0x00000004, 135 ICF_SENT_LAST_R2T = 0x00000008, 136 ICF_WITHIN_COMMAND_RECOVERY = 0x00000010, 137 ICF_CONTIG_MEMORY = 0x00000020, 138 ICF_ATTACHED_TO_RQUEUE = 0x00000040, 139 ICF_OOO_CMDSN = 0x00000080, 140 ICF_SENDTARGETS_ALL = 0x00000100, 141 ICF_SENDTARGETS_SINGLE = 0x00000200, 142 }; 143 144 /* struct iscsi_cmd->i_state */ 145 enum cmd_i_state_table { 146 ISTATE_NO_STATE = 0, 147 ISTATE_NEW_CMD = 1, 148 ISTATE_DEFERRED_CMD = 2, 149 ISTATE_UNSOLICITED_DATA = 3, 150 ISTATE_RECEIVE_DATAOUT = 4, 151 ISTATE_RECEIVE_DATAOUT_RECOVERY = 5, 152 ISTATE_RECEIVED_LAST_DATAOUT = 6, 153 ISTATE_WITHIN_DATAOUT_RECOVERY = 7, 154 ISTATE_IN_CONNECTION_RECOVERY = 8, 155 ISTATE_RECEIVED_TASKMGT = 9, 156 ISTATE_SEND_ASYNCMSG = 10, 157 ISTATE_SENT_ASYNCMSG = 11, 158 ISTATE_SEND_DATAIN = 12, 159 ISTATE_SEND_LAST_DATAIN = 13, 160 ISTATE_SENT_LAST_DATAIN = 14, 161 ISTATE_SEND_LOGOUTRSP = 15, 162 ISTATE_SENT_LOGOUTRSP = 16, 163 ISTATE_SEND_NOPIN = 17, 164 ISTATE_SENT_NOPIN = 18, 165 ISTATE_SEND_REJECT = 19, 166 ISTATE_SENT_REJECT = 20, 167 ISTATE_SEND_R2T = 21, 168 ISTATE_SENT_R2T = 22, 169 ISTATE_SEND_R2T_RECOVERY = 23, 170 ISTATE_SENT_R2T_RECOVERY = 24, 171 ISTATE_SEND_LAST_R2T = 25, 172 ISTATE_SENT_LAST_R2T = 26, 173 ISTATE_SEND_LAST_R2T_RECOVERY = 27, 174 ISTATE_SENT_LAST_R2T_RECOVERY = 28, 175 ISTATE_SEND_STATUS = 29, 176 ISTATE_SEND_STATUS_BROKEN_PC = 30, 177 ISTATE_SENT_STATUS = 31, 178 ISTATE_SEND_STATUS_RECOVERY = 32, 179 ISTATE_SENT_STATUS_RECOVERY = 33, 180 ISTATE_SEND_TASKMGTRSP = 34, 181 ISTATE_SENT_TASKMGTRSP = 35, 182 ISTATE_SEND_TEXTRSP = 36, 183 ISTATE_SENT_TEXTRSP = 37, 184 ISTATE_SEND_NOPIN_WANT_RESPONSE = 38, 185 ISTATE_SENT_NOPIN_WANT_RESPONSE = 39, 186 ISTATE_SEND_NOPIN_NO_RESPONSE = 40, 187 ISTATE_REMOVE = 41, 188 ISTATE_FREE = 42, 189 }; 190 191 /* Used for iscsi_recover_cmdsn() return values */ 192 enum recover_cmdsn_ret_table { 193 CMDSN_ERROR_CANNOT_RECOVER = -1, 194 CMDSN_NORMAL_OPERATION = 0, 195 CMDSN_LOWER_THAN_EXP = 1, 196 CMDSN_HIGHER_THAN_EXP = 2, 197 CMDSN_MAXCMDSN_OVERRUN = 3, 198 }; 199 200 /* Used for iscsi_handle_immediate_data() return values */ 201 enum immedate_data_ret_table { 202 IMMEDIATE_DATA_CANNOT_RECOVER = -1, 203 IMMEDIATE_DATA_NORMAL_OPERATION = 0, 204 IMMEDIATE_DATA_ERL1_CRC_FAILURE = 1, 205 }; 206 207 /* Used for iscsi_decide_dataout_action() return values */ 208 enum dataout_action_ret_table { 209 DATAOUT_CANNOT_RECOVER = -1, 210 DATAOUT_NORMAL = 0, 211 DATAOUT_SEND_R2T = 1, 212 DATAOUT_SEND_TO_TRANSPORT = 2, 213 DATAOUT_WITHIN_COMMAND_RECOVERY = 3, 214 }; 215 216 /* Used for struct iscsi_node_auth->naf_flags */ 217 enum naf_flags_table { 218 NAF_USERID_SET = 0x01, 219 NAF_PASSWORD_SET = 0x02, 220 NAF_USERID_IN_SET = 0x04, 221 NAF_PASSWORD_IN_SET = 0x08, 222 }; 223 224 /* Used by various struct timer_list to manage iSCSI specific state */ 225 enum iscsi_timer_flags_table { 226 ISCSI_TF_RUNNING = 0x01, 227 ISCSI_TF_STOP = 0x02, 228 ISCSI_TF_EXPIRED = 0x04, 229 }; 230 231 /* Used for struct iscsi_np->np_flags */ 232 enum np_flags_table { 233 NPF_IP_NETWORK = 0x00, 234 }; 235 236 /* Used for struct iscsi_np->np_thread_state */ 237 enum np_thread_state_table { 238 ISCSI_NP_THREAD_ACTIVE = 1, 239 ISCSI_NP_THREAD_INACTIVE = 2, 240 ISCSI_NP_THREAD_RESET = 3, 241 ISCSI_NP_THREAD_SHUTDOWN = 4, 242 ISCSI_NP_THREAD_EXIT = 5, 243 }; 244 245 struct iscsi_conn_ops { 246 u8 HeaderDigest; /* [0,1] == [None,CRC32C] */ 247 u8 DataDigest; /* [0,1] == [None,CRC32C] */ 248 u32 MaxRecvDataSegmentLength; /* [512..2**24-1] */ 249 u32 MaxXmitDataSegmentLength; /* [512..2**24-1] */ 250 u8 OFMarker; /* [0,1] == [No,Yes] */ 251 u8 IFMarker; /* [0,1] == [No,Yes] */ 252 u32 OFMarkInt; /* [1..65535] */ 253 u32 IFMarkInt; /* [1..65535] */ 254 /* 255 * iSER specific connection parameters 256 */ 257 u32 InitiatorRecvDataSegmentLength; /* [512..2**24-1] */ 258 u32 TargetRecvDataSegmentLength; /* [512..2**24-1] */ 259 }; 260 261 struct iscsi_sess_ops { 262 char InitiatorName[224]; 263 char InitiatorAlias[256]; 264 char TargetName[224]; 265 char TargetAlias[256]; 266 char TargetAddress[256]; 267 u16 TargetPortalGroupTag; /* [0..65535] */ 268 u16 MaxConnections; /* [1..65535] */ 269 u8 InitialR2T; /* [0,1] == [No,Yes] */ 270 u8 ImmediateData; /* [0,1] == [No,Yes] */ 271 u32 MaxBurstLength; /* [512..2**24-1] */ 272 u32 FirstBurstLength; /* [512..2**24-1] */ 273 u16 DefaultTime2Wait; /* [0..3600] */ 274 u16 DefaultTime2Retain; /* [0..3600] */ 275 u16 MaxOutstandingR2T; /* [1..65535] */ 276 u8 DataPDUInOrder; /* [0,1] == [No,Yes] */ 277 u8 DataSequenceInOrder; /* [0,1] == [No,Yes] */ 278 u8 ErrorRecoveryLevel; /* [0..2] */ 279 u8 SessionType; /* [0,1] == [Normal,Discovery]*/ 280 /* 281 * iSER specific session parameters 282 */ 283 u8 RDMAExtensions; /* [0,1] == [No,Yes] */ 284 }; 285 286 struct iscsi_queue_req { 287 int state; 288 struct iscsi_cmd *cmd; 289 struct list_head qr_list; 290 }; 291 292 struct iscsi_data_count { 293 int data_length; 294 int sync_and_steering; 295 enum data_count_type type; 296 u32 iov_count; 297 u32 ss_iov_count; 298 u32 ss_marker_count; 299 struct kvec *iov; 300 }; 301 302 struct iscsi_param_list { 303 bool iser; 304 struct list_head param_list; 305 struct list_head extra_response_list; 306 }; 307 308 struct iscsi_datain_req { 309 enum datain_req_comp_table dr_complete; 310 int generate_recovery_values; 311 enum datain_req_rec_table recovery; 312 u32 begrun; 313 u32 runlength; 314 u32 data_length; 315 u32 data_offset; 316 u32 data_sn; 317 u32 next_burst_len; 318 u32 read_data_done; 319 u32 seq_send_order; 320 struct list_head cmd_datain_node; 321 } ____cacheline_aligned; 322 323 struct iscsi_ooo_cmdsn { 324 u16 cid; 325 u32 batch_count; 326 u32 cmdsn; 327 u32 exp_cmdsn; 328 struct iscsi_cmd *cmd; 329 struct list_head ooo_list; 330 } ____cacheline_aligned; 331 332 struct iscsi_datain { 333 u8 flags; 334 u32 data_sn; 335 u32 length; 336 u32 offset; 337 } ____cacheline_aligned; 338 339 struct iscsi_r2t { 340 int seq_complete; 341 int recovery_r2t; 342 int sent_r2t; 343 u32 r2t_sn; 344 u32 offset; 345 u32 targ_xfer_tag; 346 u32 xfer_len; 347 struct list_head r2t_list; 348 } ____cacheline_aligned; 349 350 struct iscsi_cmd { 351 enum iscsi_timer_flags_table dataout_timer_flags; 352 /* DataOUT timeout retries */ 353 u8 dataout_timeout_retries; 354 /* Within command recovery count */ 355 u8 error_recovery_count; 356 /* iSCSI dependent state for out or order CmdSNs */ 357 enum cmd_i_state_table deferred_i_state; 358 /* iSCSI dependent state */ 359 enum cmd_i_state_table i_state; 360 /* Command is an immediate command (ISCSI_OP_IMMEDIATE set) */ 361 u8 immediate_cmd; 362 /* Immediate data present */ 363 u8 immediate_data; 364 /* iSCSI Opcode */ 365 u8 iscsi_opcode; 366 /* iSCSI Response Code */ 367 u8 iscsi_response; 368 /* Logout reason when iscsi_opcode == ISCSI_INIT_LOGOUT_CMND */ 369 u8 logout_reason; 370 /* Logout response code when iscsi_opcode == ISCSI_INIT_LOGOUT_CMND */ 371 u8 logout_response; 372 /* MaxCmdSN has been incremented */ 373 u8 maxcmdsn_inc; 374 /* Immediate Unsolicited Dataout */ 375 u8 unsolicited_data; 376 /* Reject reason code */ 377 u8 reject_reason; 378 /* CID contained in logout PDU when opcode == ISCSI_INIT_LOGOUT_CMND */ 379 u16 logout_cid; 380 /* Command flags */ 381 enum cmd_flags_table cmd_flags; 382 /* Initiator Task Tag assigned from Initiator */ 383 itt_t init_task_tag; 384 /* Target Transfer Tag assigned from Target */ 385 u32 targ_xfer_tag; 386 /* CmdSN assigned from Initiator */ 387 u32 cmd_sn; 388 /* ExpStatSN assigned from Initiator */ 389 u32 exp_stat_sn; 390 /* StatSN assigned to this ITT */ 391 u32 stat_sn; 392 /* DataSN Counter */ 393 u32 data_sn; 394 /* R2TSN Counter */ 395 u32 r2t_sn; 396 /* Last DataSN acknowledged via DataAck SNACK */ 397 u32 acked_data_sn; 398 /* Used for echoing NOPOUT ping data */ 399 u32 buf_ptr_size; 400 /* Used to store DataDigest */ 401 u32 data_crc; 402 /* Counter for MaxOutstandingR2T */ 403 u32 outstanding_r2ts; 404 /* Next R2T Offset when DataSequenceInOrder=Yes */ 405 u32 r2t_offset; 406 /* Iovec current and orig count for iscsi_cmd->iov_data */ 407 u32 iov_data_count; 408 u32 orig_iov_data_count; 409 /* Number of miscellaneous iovecs used for IP stack calls */ 410 u32 iov_misc_count; 411 /* Number of struct iscsi_pdu in struct iscsi_cmd->pdu_list */ 412 u32 pdu_count; 413 /* Next struct iscsi_pdu to send in struct iscsi_cmd->pdu_list */ 414 u32 pdu_send_order; 415 /* Current struct iscsi_pdu in struct iscsi_cmd->pdu_list */ 416 u32 pdu_start; 417 /* Next struct iscsi_seq to send in struct iscsi_cmd->seq_list */ 418 u32 seq_send_order; 419 /* Number of struct iscsi_seq in struct iscsi_cmd->seq_list */ 420 u32 seq_count; 421 /* Current struct iscsi_seq in struct iscsi_cmd->seq_list */ 422 u32 seq_no; 423 /* Lowest offset in current DataOUT sequence */ 424 u32 seq_start_offset; 425 /* Highest offset in current DataOUT sequence */ 426 u32 seq_end_offset; 427 /* Total size in bytes received so far of READ data */ 428 u32 read_data_done; 429 /* Total size in bytes received so far of WRITE data */ 430 u32 write_data_done; 431 /* Counter for FirstBurstLength key */ 432 u32 first_burst_len; 433 /* Counter for MaxBurstLength key */ 434 u32 next_burst_len; 435 /* Transfer size used for IP stack calls */ 436 u32 tx_size; 437 /* Buffer used for various purposes */ 438 void *buf_ptr; 439 /* Used by SendTargets=[iqn.,eui.] discovery */ 440 void *text_in_ptr; 441 /* See include/linux/dma-mapping.h */ 442 enum dma_data_direction data_direction; 443 /* iSCSI PDU Header + CRC */ 444 unsigned char pdu[ISCSI_HDR_LEN + ISCSI_CRC_LEN]; 445 /* Number of times struct iscsi_cmd is present in immediate queue */ 446 atomic_t immed_queue_count; 447 atomic_t response_queue_count; 448 spinlock_t datain_lock; 449 spinlock_t dataout_timeout_lock; 450 /* spinlock for protecting struct iscsi_cmd->i_state */ 451 spinlock_t istate_lock; 452 /* spinlock for adding within command recovery entries */ 453 spinlock_t error_lock; 454 /* spinlock for adding R2Ts */ 455 spinlock_t r2t_lock; 456 /* DataIN List */ 457 struct list_head datain_list; 458 /* R2T List */ 459 struct list_head cmd_r2t_list; 460 /* Timer for DataOUT */ 461 struct timer_list dataout_timer; 462 /* Iovecs for SCSI data payload RX/TX w/ kernel level sockets */ 463 struct kvec *iov_data; 464 /* Iovecs for miscellaneous purposes */ 465 #define ISCSI_MISC_IOVECS 5 466 struct kvec iov_misc[ISCSI_MISC_IOVECS]; 467 /* Array of struct iscsi_pdu used for DataPDUInOrder=No */ 468 struct iscsi_pdu *pdu_list; 469 /* Current struct iscsi_pdu used for DataPDUInOrder=No */ 470 struct iscsi_pdu *pdu_ptr; 471 /* Array of struct iscsi_seq used for DataSequenceInOrder=No */ 472 struct iscsi_seq *seq_list; 473 /* Current struct iscsi_seq used for DataSequenceInOrder=No */ 474 struct iscsi_seq *seq_ptr; 475 /* TMR Request when iscsi_opcode == ISCSI_OP_SCSI_TMFUNC */ 476 struct iscsi_tmr_req *tmr_req; 477 /* Connection this command is alligient to */ 478 struct iscsi_conn *conn; 479 /* Pointer to connection recovery entry */ 480 struct iscsi_conn_recovery *cr; 481 /* Session the command is part of, used for connection recovery */ 482 struct iscsi_session *sess; 483 /* list_head for connection list */ 484 struct list_head i_conn_node; 485 /* The TCM I/O descriptor that is accessed via container_of() */ 486 struct se_cmd se_cmd; 487 /* Sense buffer that will be mapped into outgoing status */ 488 #define ISCSI_SENSE_BUFFER_LEN (TRANSPORT_SENSE_BUFFER + 2) 489 unsigned char sense_buffer[ISCSI_SENSE_BUFFER_LEN]; 490 491 u32 padding; 492 u8 pad_bytes[4]; 493 494 struct scatterlist *first_data_sg; 495 u32 first_data_sg_off; 496 u32 kmapped_nents; 497 sense_reason_t sense_reason; 498 } ____cacheline_aligned; 499 500 struct iscsi_tmr_req { 501 bool task_reassign:1; 502 u32 exp_data_sn; 503 struct iscsi_cmd *ref_cmd; 504 struct iscsi_conn_recovery *conn_recovery; 505 struct se_tmr_req *se_tmr_req; 506 }; 507 508 struct iscsi_conn { 509 wait_queue_head_t queues_wq; 510 /* Authentication Successful for this connection */ 511 u8 auth_complete; 512 /* State connection is currently in */ 513 u8 conn_state; 514 u8 conn_logout_reason; 515 u8 network_transport; 516 enum iscsi_timer_flags_table nopin_timer_flags; 517 enum iscsi_timer_flags_table nopin_response_timer_flags; 518 /* Used to know what thread encountered a transport failure */ 519 u8 which_thread; 520 /* connection id assigned by the Initiator */ 521 u16 cid; 522 /* Remote TCP Port */ 523 u16 login_port; 524 u16 local_port; 525 int net_size; 526 int login_family; 527 u32 auth_id; 528 u32 conn_flags; 529 /* Used for iscsi_tx_login_rsp() */ 530 itt_t login_itt; 531 u32 exp_statsn; 532 /* Per connection status sequence number */ 533 u32 stat_sn; 534 /* IFMarkInt's Current Value */ 535 u32 if_marker; 536 /* OFMarkInt's Current Value */ 537 u32 of_marker; 538 /* Used for calculating OFMarker offset to next PDU */ 539 u32 of_marker_offset; 540 #define IPV6_ADDRESS_SPACE 48 541 unsigned char login_ip[IPV6_ADDRESS_SPACE]; 542 unsigned char local_ip[IPV6_ADDRESS_SPACE]; 543 int conn_usage_count; 544 int conn_waiting_on_uc; 545 atomic_t check_immediate_queue; 546 atomic_t conn_logout_remove; 547 atomic_t connection_exit; 548 atomic_t connection_recovery; 549 atomic_t connection_reinstatement; 550 atomic_t connection_wait_rcfr; 551 atomic_t sleep_on_conn_wait_comp; 552 atomic_t transport_failed; 553 struct completion conn_post_wait_comp; 554 struct completion conn_wait_comp; 555 struct completion conn_wait_rcfr_comp; 556 struct completion conn_waiting_on_uc_comp; 557 struct completion conn_logout_comp; 558 struct completion tx_half_close_comp; 559 struct completion rx_half_close_comp; 560 /* socket used by this connection */ 561 struct socket *sock; 562 void (*orig_data_ready)(struct sock *); 563 void (*orig_state_change)(struct sock *); 564 #define LOGIN_FLAGS_READ_ACTIVE 1 565 #define LOGIN_FLAGS_CLOSED 2 566 #define LOGIN_FLAGS_READY 4 567 unsigned long login_flags; 568 struct delayed_work login_work; 569 struct delayed_work login_cleanup_work; 570 struct iscsi_login *login; 571 struct timer_list nopin_timer; 572 struct timer_list nopin_response_timer; 573 struct timer_list transport_timer; 574 struct task_struct *login_kworker; 575 /* Spinlock used for add/deleting cmd's from conn_cmd_list */ 576 spinlock_t cmd_lock; 577 spinlock_t conn_usage_lock; 578 spinlock_t immed_queue_lock; 579 spinlock_t nopin_timer_lock; 580 spinlock_t response_queue_lock; 581 spinlock_t state_lock; 582 /* libcrypto RX and TX contexts for crc32c */ 583 struct hash_desc conn_rx_hash; 584 struct hash_desc conn_tx_hash; 585 /* Used for scheduling TX and RX connection kthreads */ 586 cpumask_var_t conn_cpumask; 587 unsigned int conn_rx_reset_cpumask:1; 588 unsigned int conn_tx_reset_cpumask:1; 589 /* list_head of struct iscsi_cmd for this connection */ 590 struct list_head conn_cmd_list; 591 struct list_head immed_queue_list; 592 struct list_head response_queue_list; 593 struct iscsi_conn_ops *conn_ops; 594 struct iscsi_login *conn_login; 595 struct iscsit_transport *conn_transport; 596 struct iscsi_param_list *param_list; 597 /* Used for per connection auth state machine */ 598 void *auth_protocol; 599 void *context; 600 struct iscsi_login_thread_s *login_thread; 601 struct iscsi_portal_group *tpg; 602 struct iscsi_tpg_np *tpg_np; 603 /* Pointer to parent session */ 604 struct iscsi_session *sess; 605 int bitmap_id; 606 int rx_thread_active; 607 struct task_struct *rx_thread; 608 int tx_thread_active; 609 struct task_struct *tx_thread; 610 /* list_head for session connection list */ 611 struct list_head conn_list; 612 } ____cacheline_aligned; 613 614 struct iscsi_conn_recovery { 615 u16 cid; 616 u32 cmd_count; 617 u32 maxrecvdatasegmentlength; 618 u32 maxxmitdatasegmentlength; 619 int ready_for_reallegiance; 620 struct list_head conn_recovery_cmd_list; 621 spinlock_t conn_recovery_cmd_lock; 622 struct timer_list time2retain_timer; 623 struct iscsi_session *sess; 624 struct list_head cr_list; 625 } ____cacheline_aligned; 626 627 struct iscsi_session { 628 u8 initiator_vendor; 629 u8 isid[6]; 630 enum iscsi_timer_flags_table time2retain_timer_flags; 631 u8 version_active; 632 u16 cid_called; 633 u16 conn_recovery_count; 634 u16 tsih; 635 /* state session is currently in */ 636 u32 session_state; 637 /* session wide counter: initiator assigned task tag */ 638 itt_t init_task_tag; 639 /* session wide counter: target assigned task tag */ 640 u32 targ_xfer_tag; 641 u32 cmdsn_window; 642 643 /* protects cmdsn values */ 644 struct mutex cmdsn_mutex; 645 /* session wide counter: expected command sequence number */ 646 u32 exp_cmd_sn; 647 /* session wide counter: maximum allowed command sequence number */ 648 u32 max_cmd_sn; 649 struct list_head sess_ooo_cmdsn_list; 650 651 /* LIO specific session ID */ 652 u32 sid; 653 char auth_type[8]; 654 /* unique within the target */ 655 int session_index; 656 /* Used for session reference counting */ 657 int session_usage_count; 658 int session_waiting_on_uc; 659 atomic_long_t cmd_pdus; 660 atomic_long_t rsp_pdus; 661 atomic_long_t tx_data_octets; 662 atomic_long_t rx_data_octets; 663 atomic_long_t conn_digest_errors; 664 atomic_long_t conn_timeout_errors; 665 u64 creation_time; 666 /* Number of active connections */ 667 atomic_t nconn; 668 atomic_t session_continuation; 669 atomic_t session_fall_back_to_erl0; 670 atomic_t session_logout; 671 atomic_t session_reinstatement; 672 atomic_t session_stop_active; 673 atomic_t sleep_on_sess_wait_comp; 674 /* connection list */ 675 struct list_head sess_conn_list; 676 struct list_head cr_active_list; 677 struct list_head cr_inactive_list; 678 spinlock_t conn_lock; 679 spinlock_t cr_a_lock; 680 spinlock_t cr_i_lock; 681 spinlock_t session_usage_lock; 682 spinlock_t ttt_lock; 683 struct completion async_msg_comp; 684 struct completion reinstatement_comp; 685 struct completion session_wait_comp; 686 struct completion session_waiting_on_uc_comp; 687 struct timer_list time2retain_timer; 688 struct iscsi_sess_ops *sess_ops; 689 struct se_session *se_sess; 690 struct iscsi_portal_group *tpg; 691 } ____cacheline_aligned; 692 693 struct iscsi_login { 694 u8 auth_complete; 695 u8 checked_for_existing; 696 u8 current_stage; 697 u8 leading_connection; 698 u8 first_request; 699 u8 version_min; 700 u8 version_max; 701 u8 login_complete; 702 u8 login_failed; 703 bool zero_tsih; 704 char isid[6]; 705 u32 cmd_sn; 706 itt_t init_task_tag; 707 u32 initial_exp_statsn; 708 u32 rsp_length; 709 u16 cid; 710 u16 tsih; 711 char req[ISCSI_HDR_LEN]; 712 char rsp[ISCSI_HDR_LEN]; 713 char *req_buf; 714 char *rsp_buf; 715 struct iscsi_conn *conn; 716 struct iscsi_np *np; 717 } ____cacheline_aligned; 718 719 struct iscsi_node_attrib { 720 u32 dataout_timeout; 721 u32 dataout_timeout_retries; 722 u32 default_erl; 723 u32 nopin_timeout; 724 u32 nopin_response_timeout; 725 u32 random_datain_pdu_offsets; 726 u32 random_datain_seq_offsets; 727 u32 random_r2t_offsets; 728 u32 tmr_cold_reset; 729 u32 tmr_warm_reset; 730 struct iscsi_node_acl *nacl; 731 }; 732 733 struct se_dev_entry_s; 734 735 struct iscsi_node_auth { 736 enum naf_flags_table naf_flags; 737 int authenticate_target; 738 /* Used for iscsit_global->discovery_auth, 739 * set to zero (auth disabled) by default */ 740 int enforce_discovery_auth; 741 #define MAX_USER_LEN 256 742 #define MAX_PASS_LEN 256 743 char userid[MAX_USER_LEN]; 744 char password[MAX_PASS_LEN]; 745 char userid_mutual[MAX_USER_LEN]; 746 char password_mutual[MAX_PASS_LEN]; 747 }; 748 749 #include "iscsi_target_stat.h" 750 751 struct iscsi_node_stat_grps { 752 struct config_group iscsi_sess_stats_group; 753 struct config_group iscsi_conn_stats_group; 754 }; 755 756 struct iscsi_node_acl { 757 struct iscsi_node_attrib node_attrib; 758 struct iscsi_node_auth node_auth; 759 struct iscsi_node_stat_grps node_stat_grps; 760 struct se_node_acl se_node_acl; 761 }; 762 763 struct iscsi_tpg_attrib { 764 u32 authentication; 765 u32 login_timeout; 766 u32 netif_timeout; 767 u32 generate_node_acls; 768 u32 cache_dynamic_acls; 769 u32 default_cmdsn_depth; 770 u32 demo_mode_write_protect; 771 u32 prod_mode_write_protect; 772 u32 demo_mode_discovery; 773 u32 default_erl; 774 u8 t10_pi; 775 u32 fabric_prot_type; 776 struct iscsi_portal_group *tpg; 777 }; 778 779 struct iscsi_np { 780 int np_network_transport; 781 int np_ip_proto; 782 int np_sock_type; 783 enum np_thread_state_table np_thread_state; 784 bool enabled; 785 enum iscsi_timer_flags_table np_login_timer_flags; 786 u32 np_exports; 787 enum np_flags_table np_flags; 788 unsigned char np_ip[IPV6_ADDRESS_SPACE]; 789 u16 np_port; 790 spinlock_t np_thread_lock; 791 struct completion np_restart_comp; 792 struct socket *np_socket; 793 struct __kernel_sockaddr_storage np_sockaddr; 794 struct task_struct *np_thread; 795 struct timer_list np_login_timer; 796 void *np_context; 797 struct iscsit_transport *np_transport; 798 struct list_head np_list; 799 } ____cacheline_aligned; 800 801 struct iscsi_tpg_np { 802 struct iscsi_np *tpg_np; 803 struct iscsi_portal_group *tpg; 804 struct iscsi_tpg_np *tpg_np_parent; 805 struct list_head tpg_np_list; 806 struct list_head tpg_np_child_list; 807 struct list_head tpg_np_parent_list; 808 struct se_tpg_np se_tpg_np; 809 spinlock_t tpg_np_parent_lock; 810 struct completion tpg_np_comp; 811 struct kref tpg_np_kref; 812 }; 813 814 struct iscsi_portal_group { 815 unsigned char tpg_chap_id; 816 /* TPG State */ 817 enum tpg_state_table tpg_state; 818 /* Target Portal Group Tag */ 819 u16 tpgt; 820 /* Id assigned to target sessions */ 821 u16 ntsih; 822 /* Number of active sessions */ 823 u32 nsessions; 824 /* Number of Network Portals available for this TPG */ 825 u32 num_tpg_nps; 826 /* Per TPG LIO specific session ID. */ 827 u32 sid; 828 /* Spinlock for adding/removing Network Portals */ 829 spinlock_t tpg_np_lock; 830 spinlock_t tpg_state_lock; 831 struct se_portal_group tpg_se_tpg; 832 struct mutex tpg_access_lock; 833 struct semaphore np_login_sem; 834 struct iscsi_tpg_attrib tpg_attrib; 835 struct iscsi_node_auth tpg_demo_auth; 836 /* Pointer to default list of iSCSI parameters for TPG */ 837 struct iscsi_param_list *param_list; 838 struct iscsi_tiqn *tpg_tiqn; 839 struct list_head tpg_gnp_list; 840 struct list_head tpg_list; 841 } ____cacheline_aligned; 842 843 struct iscsi_wwn_stat_grps { 844 struct config_group iscsi_stat_group; 845 struct config_group iscsi_instance_group; 846 struct config_group iscsi_sess_err_group; 847 struct config_group iscsi_tgt_attr_group; 848 struct config_group iscsi_login_stats_group; 849 struct config_group iscsi_logout_stats_group; 850 }; 851 852 struct iscsi_tiqn { 853 #define ISCSI_IQN_LEN 224 854 unsigned char tiqn[ISCSI_IQN_LEN]; 855 enum tiqn_state_table tiqn_state; 856 int tiqn_access_count; 857 u32 tiqn_active_tpgs; 858 u32 tiqn_ntpgs; 859 u32 tiqn_num_tpg_nps; 860 u32 tiqn_nsessions; 861 struct list_head tiqn_list; 862 struct list_head tiqn_tpg_list; 863 spinlock_t tiqn_state_lock; 864 spinlock_t tiqn_tpg_lock; 865 struct se_wwn tiqn_wwn; 866 struct iscsi_wwn_stat_grps tiqn_stat_grps; 867 int tiqn_index; 868 struct iscsi_sess_err_stats sess_err_stats; 869 struct iscsi_login_stats login_stats; 870 struct iscsi_logout_stats logout_stats; 871 } ____cacheline_aligned; 872 873 struct iscsit_global { 874 /* In core shutdown */ 875 u32 in_shutdown; 876 u32 active_ts; 877 /* Unique identifier used for the authentication daemon */ 878 u32 auth_id; 879 u32 inactive_ts; 880 #define ISCSIT_BITMAP_BITS 262144 881 /* Thread Set bitmap pointer */ 882 unsigned long *ts_bitmap; 883 spinlock_t ts_bitmap_lock; 884 /* Used for iSCSI discovery session authentication */ 885 struct iscsi_node_acl discovery_acl; 886 struct iscsi_portal_group *discovery_tpg; 887 }; 888 889 static inline u32 session_get_next_ttt(struct iscsi_session *session) 890 { 891 u32 ttt; 892 893 spin_lock_bh(&session->ttt_lock); 894 ttt = session->targ_xfer_tag++; 895 if (ttt == 0xFFFFFFFF) 896 ttt = session->targ_xfer_tag++; 897 spin_unlock_bh(&session->ttt_lock); 898 899 return ttt; 900 } 901 902 extern struct iscsi_cmd *iscsit_find_cmd_from_itt(struct iscsi_conn *, itt_t); 903 #endif /* ISCSI_TARGET_CORE_H */ 904