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" 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#define ISCSIT_MIN_TAGS 16 21#define ISCSIT_EXTRA_TAGS 8 22#define ISCSIT_TCP_BACKLOG 256 23#define ISCSI_RX_THREAD_NAME "iscsi_trx" 24#define ISCSI_TX_THREAD_NAME "iscsi_ttx" 25 26/* struct iscsi_node_attrib sanity values */ 27#define NA_DATAOUT_TIMEOUT 3 28#define NA_DATAOUT_TIMEOUT_MAX 60 29#define NA_DATAOUT_TIMEOUT_MIX 2 30#define NA_DATAOUT_TIMEOUT_RETRIES 5 31#define NA_DATAOUT_TIMEOUT_RETRIES_MAX 15 32#define NA_DATAOUT_TIMEOUT_RETRIES_MIN 1 33#define NA_NOPIN_TIMEOUT 15 34#define NA_NOPIN_TIMEOUT_MAX 60 35#define NA_NOPIN_TIMEOUT_MIN 3 36#define NA_NOPIN_RESPONSE_TIMEOUT 30 37#define NA_NOPIN_RESPONSE_TIMEOUT_MAX 60 38#define NA_NOPIN_RESPONSE_TIMEOUT_MIN 3 39#define NA_RANDOM_DATAIN_PDU_OFFSETS 0 40#define NA_RANDOM_DATAIN_SEQ_OFFSETS 0 41#define NA_RANDOM_R2T_OFFSETS 0 42 43/* struct iscsi_tpg_attrib sanity values */ 44#define TA_AUTHENTICATION 1 45#define TA_LOGIN_TIMEOUT 15 46#define TA_LOGIN_TIMEOUT_MAX 30 47#define TA_LOGIN_TIMEOUT_MIN 5 48#define TA_NETIF_TIMEOUT 2 49#define TA_NETIF_TIMEOUT_MAX 15 50#define TA_NETIF_TIMEOUT_MIN 2 51#define TA_GENERATE_NODE_ACLS 0 52#define TA_DEFAULT_CMDSN_DEPTH 64 53#define TA_DEFAULT_CMDSN_DEPTH_MAX 512 54#define TA_DEFAULT_CMDSN_DEPTH_MIN 1 55#define TA_CACHE_DYNAMIC_ACLS 0 56/* Enabled by default in demo mode (generic_node_acls=1) */ 57#define TA_DEMO_MODE_WRITE_PROTECT 1 58/* Disabled by default in production mode w/ explict ACLs */ 59#define TA_PROD_MODE_WRITE_PROTECT 0 60#define TA_DEMO_MODE_DISCOVERY 1 61#define TA_DEFAULT_ERL 0 62#define TA_CACHE_CORE_NPS 0 63/* T10 protection information disabled by default */ 64#define TA_DEFAULT_T10_PI 0 65#define TA_DEFAULT_FABRIC_PROT_TYPE 0 66 67#define ISCSI_IOV_DATA_BUFFER 5 68 69enum iscsit_transport_type { 70 ISCSI_TCP = 0, 71 ISCSI_SCTP_TCP = 1, 72 ISCSI_SCTP_UDP = 2, 73 ISCSI_IWARP_TCP = 3, 74 ISCSI_IWARP_SCTP = 4, 75 ISCSI_INFINIBAND = 5, 76}; 77 78/* RFC-3720 7.1.4 Standard Connection State Diagram for a Target */ 79enum target_conn_state_table { 80 TARG_CONN_STATE_FREE = 0x1, 81 TARG_CONN_STATE_XPT_UP = 0x3, 82 TARG_CONN_STATE_IN_LOGIN = 0x4, 83 TARG_CONN_STATE_LOGGED_IN = 0x5, 84 TARG_CONN_STATE_IN_LOGOUT = 0x6, 85 TARG_CONN_STATE_LOGOUT_REQUESTED = 0x7, 86 TARG_CONN_STATE_CLEANUP_WAIT = 0x8, 87}; 88 89/* RFC-3720 7.3.2 Session State Diagram for a Target */ 90enum target_sess_state_table { 91 TARG_SESS_STATE_FREE = 0x1, 92 TARG_SESS_STATE_ACTIVE = 0x2, 93 TARG_SESS_STATE_LOGGED_IN = 0x3, 94 TARG_SESS_STATE_FAILED = 0x4, 95 TARG_SESS_STATE_IN_CONTINUE = 0x5, 96}; 97 98/* struct iscsi_data_count->type */ 99enum data_count_type { 100 ISCSI_RX_DATA = 1, 101 ISCSI_TX_DATA = 2, 102}; 103 104/* struct iscsi_datain_req->dr_complete */ 105enum datain_req_comp_table { 106 DATAIN_COMPLETE_NORMAL = 1, 107 DATAIN_COMPLETE_WITHIN_COMMAND_RECOVERY = 2, 108 DATAIN_COMPLETE_CONNECTION_RECOVERY = 3, 109}; 110 111/* struct iscsi_datain_req->recovery */ 112enum datain_req_rec_table { 113 DATAIN_WITHIN_COMMAND_RECOVERY = 1, 114 DATAIN_CONNECTION_RECOVERY = 2, 115}; 116 117/* struct iscsi_portal_group->state */ 118enum tpg_state_table { 119 TPG_STATE_FREE = 0, 120 TPG_STATE_ACTIVE = 1, 121 TPG_STATE_INACTIVE = 2, 122 TPG_STATE_COLD_RESET = 3, 123}; 124 125/* struct iscsi_tiqn->tiqn_state */ 126enum tiqn_state_table { 127 TIQN_STATE_ACTIVE = 1, 128 TIQN_STATE_SHUTDOWN = 2, 129}; 130 131/* struct iscsi_cmd->cmd_flags */ 132enum cmd_flags_table { 133 ICF_GOT_LAST_DATAOUT = 0x00000001, 134 ICF_GOT_DATACK_SNACK = 0x00000002, 135 ICF_NON_IMMEDIATE_UNSOLICITED_DATA = 0x00000004, 136 ICF_SENT_LAST_R2T = 0x00000008, 137 ICF_WITHIN_COMMAND_RECOVERY = 0x00000010, 138 ICF_CONTIG_MEMORY = 0x00000020, 139 ICF_ATTACHED_TO_RQUEUE = 0x00000040, 140 ICF_OOO_CMDSN = 0x00000080, 141 ICF_SENDTARGETS_ALL = 0x00000100, 142 ICF_SENDTARGETS_SINGLE = 0x00000200, 143}; 144 145/* struct iscsi_cmd->i_state */ 146enum cmd_i_state_table { 147 ISTATE_NO_STATE = 0, 148 ISTATE_NEW_CMD = 1, 149 ISTATE_DEFERRED_CMD = 2, 150 ISTATE_UNSOLICITED_DATA = 3, 151 ISTATE_RECEIVE_DATAOUT = 4, 152 ISTATE_RECEIVE_DATAOUT_RECOVERY = 5, 153 ISTATE_RECEIVED_LAST_DATAOUT = 6, 154 ISTATE_WITHIN_DATAOUT_RECOVERY = 7, 155 ISTATE_IN_CONNECTION_RECOVERY = 8, 156 ISTATE_RECEIVED_TASKMGT = 9, 157 ISTATE_SEND_ASYNCMSG = 10, 158 ISTATE_SENT_ASYNCMSG = 11, 159 ISTATE_SEND_DATAIN = 12, 160 ISTATE_SEND_LAST_DATAIN = 13, 161 ISTATE_SENT_LAST_DATAIN = 14, 162 ISTATE_SEND_LOGOUTRSP = 15, 163 ISTATE_SENT_LOGOUTRSP = 16, 164 ISTATE_SEND_NOPIN = 17, 165 ISTATE_SENT_NOPIN = 18, 166 ISTATE_SEND_REJECT = 19, 167 ISTATE_SENT_REJECT = 20, 168 ISTATE_SEND_R2T = 21, 169 ISTATE_SENT_R2T = 22, 170 ISTATE_SEND_R2T_RECOVERY = 23, 171 ISTATE_SENT_R2T_RECOVERY = 24, 172 ISTATE_SEND_LAST_R2T = 25, 173 ISTATE_SENT_LAST_R2T = 26, 174 ISTATE_SEND_LAST_R2T_RECOVERY = 27, 175 ISTATE_SENT_LAST_R2T_RECOVERY = 28, 176 ISTATE_SEND_STATUS = 29, 177 ISTATE_SEND_STATUS_BROKEN_PC = 30, 178 ISTATE_SENT_STATUS = 31, 179 ISTATE_SEND_STATUS_RECOVERY = 32, 180 ISTATE_SENT_STATUS_RECOVERY = 33, 181 ISTATE_SEND_TASKMGTRSP = 34, 182 ISTATE_SENT_TASKMGTRSP = 35, 183 ISTATE_SEND_TEXTRSP = 36, 184 ISTATE_SENT_TEXTRSP = 37, 185 ISTATE_SEND_NOPIN_WANT_RESPONSE = 38, 186 ISTATE_SENT_NOPIN_WANT_RESPONSE = 39, 187 ISTATE_SEND_NOPIN_NO_RESPONSE = 40, 188 ISTATE_REMOVE = 41, 189 ISTATE_FREE = 42, 190}; 191 192/* Used for iscsi_recover_cmdsn() return values */ 193enum recover_cmdsn_ret_table { 194 CMDSN_ERROR_CANNOT_RECOVER = -1, 195 CMDSN_NORMAL_OPERATION = 0, 196 CMDSN_LOWER_THAN_EXP = 1, 197 CMDSN_HIGHER_THAN_EXP = 2, 198 CMDSN_MAXCMDSN_OVERRUN = 3, 199}; 200 201/* Used for iscsi_handle_immediate_data() return values */ 202enum immedate_data_ret_table { 203 IMMEDIATE_DATA_CANNOT_RECOVER = -1, 204 IMMEDIATE_DATA_NORMAL_OPERATION = 0, 205 IMMEDIATE_DATA_ERL1_CRC_FAILURE = 1, 206}; 207 208/* Used for iscsi_decide_dataout_action() return values */ 209enum dataout_action_ret_table { 210 DATAOUT_CANNOT_RECOVER = -1, 211 DATAOUT_NORMAL = 0, 212 DATAOUT_SEND_R2T = 1, 213 DATAOUT_SEND_TO_TRANSPORT = 2, 214 DATAOUT_WITHIN_COMMAND_RECOVERY = 3, 215}; 216 217/* Used for struct iscsi_node_auth->naf_flags */ 218enum naf_flags_table { 219 NAF_USERID_SET = 0x01, 220 NAF_PASSWORD_SET = 0x02, 221 NAF_USERID_IN_SET = 0x04, 222 NAF_PASSWORD_IN_SET = 0x08, 223}; 224 225/* Used by various struct timer_list to manage iSCSI specific state */ 226enum iscsi_timer_flags_table { 227 ISCSI_TF_RUNNING = 0x01, 228 ISCSI_TF_STOP = 0x02, 229 ISCSI_TF_EXPIRED = 0x04, 230}; 231 232/* Used for struct iscsi_np->np_flags */ 233enum np_flags_table { 234 NPF_IP_NETWORK = 0x00, 235}; 236 237/* Used for struct iscsi_np->np_thread_state */ 238enum np_thread_state_table { 239 ISCSI_NP_THREAD_ACTIVE = 1, 240 ISCSI_NP_THREAD_INACTIVE = 2, 241 ISCSI_NP_THREAD_RESET = 3, 242 ISCSI_NP_THREAD_SHUTDOWN = 4, 243 ISCSI_NP_THREAD_EXIT = 5, 244}; 245 246struct iscsi_conn_ops { 247 u8 HeaderDigest; /* [0,1] == [None,CRC32C] */ 248 u8 DataDigest; /* [0,1] == [None,CRC32C] */ 249 u32 MaxRecvDataSegmentLength; /* [512..2**24-1] */ 250 u32 MaxXmitDataSegmentLength; /* [512..2**24-1] */ 251 u8 OFMarker; /* [0,1] == [No,Yes] */ 252 u8 IFMarker; /* [0,1] == [No,Yes] */ 253 u32 OFMarkInt; /* [1..65535] */ 254 u32 IFMarkInt; /* [1..65535] */ 255 /* 256 * iSER specific connection parameters 257 */ 258 u32 InitiatorRecvDataSegmentLength; /* [512..2**24-1] */ 259 u32 TargetRecvDataSegmentLength; /* [512..2**24-1] */ 260}; 261 262struct iscsi_sess_ops { 263 char InitiatorName[224]; 264 char InitiatorAlias[256]; 265 char TargetName[224]; 266 char TargetAlias[256]; 267 char TargetAddress[256]; 268 u16 TargetPortalGroupTag; /* [0..65535] */ 269 u16 MaxConnections; /* [1..65535] */ 270 u8 InitialR2T; /* [0,1] == [No,Yes] */ 271 u8 ImmediateData; /* [0,1] == [No,Yes] */ 272 u32 MaxBurstLength; /* [512..2**24-1] */ 273 u32 FirstBurstLength; /* [512..2**24-1] */ 274 u16 DefaultTime2Wait; /* [0..3600] */ 275 u16 DefaultTime2Retain; /* [0..3600] */ 276 u16 MaxOutstandingR2T; /* [1..65535] */ 277 u8 DataPDUInOrder; /* [0,1] == [No,Yes] */ 278 u8 DataSequenceInOrder; /* [0,1] == [No,Yes] */ 279 u8 ErrorRecoveryLevel; /* [0..2] */ 280 u8 SessionType; /* [0,1] == [Normal,Discovery]*/ 281 /* 282 * iSER specific session parameters 283 */ 284 u8 RDMAExtensions; /* [0,1] == [No,Yes] */ 285}; 286 287struct iscsi_queue_req { 288 int state; 289 struct iscsi_cmd *cmd; 290 struct list_head qr_list; 291}; 292 293struct iscsi_data_count { 294 int data_length; 295 int sync_and_steering; 296 enum data_count_type type; 297 u32 iov_count; 298 u32 ss_iov_count; 299 u32 ss_marker_count; 300 struct kvec *iov; 301}; 302 303struct iscsi_param_list { 304 bool iser; 305 struct list_head param_list; 306 struct list_head extra_response_list; 307}; 308 309struct iscsi_datain_req { 310 enum datain_req_comp_table dr_complete; 311 int generate_recovery_values; 312 enum datain_req_rec_table recovery; 313 u32 begrun; 314 u32 runlength; 315 u32 data_length; 316 u32 data_offset; 317 u32 data_sn; 318 u32 next_burst_len; 319 u32 read_data_done; 320 u32 seq_send_order; 321 struct list_head cmd_datain_node; 322} ____cacheline_aligned; 323 324struct iscsi_ooo_cmdsn { 325 u16 cid; 326 u32 batch_count; 327 u32 cmdsn; 328 u32 exp_cmdsn; 329 struct iscsi_cmd *cmd; 330 struct list_head ooo_list; 331} ____cacheline_aligned; 332 333struct iscsi_datain { 334 u8 flags; 335 u32 data_sn; 336 u32 length; 337 u32 offset; 338} ____cacheline_aligned; 339 340struct iscsi_r2t { 341 int seq_complete; 342 int recovery_r2t; 343 int sent_r2t; 344 u32 r2t_sn; 345 u32 offset; 346 u32 targ_xfer_tag; 347 u32 xfer_len; 348 struct list_head r2t_list; 349} ____cacheline_aligned; 350 351struct iscsi_cmd { 352 enum iscsi_timer_flags_table dataout_timer_flags; 353 /* DataOUT timeout retries */ 354 u8 dataout_timeout_retries; 355 /* Within command recovery count */ 356 u8 error_recovery_count; 357 /* iSCSI dependent state for out or order CmdSNs */ 358 enum cmd_i_state_table deferred_i_state; 359 /* iSCSI dependent state */ 360 enum cmd_i_state_table i_state; 361 /* Command is an immediate command (ISCSI_OP_IMMEDIATE set) */ 362 u8 immediate_cmd; 363 /* Immediate data present */ 364 u8 immediate_data; 365 /* iSCSI Opcode */ 366 u8 iscsi_opcode; 367 /* iSCSI Response Code */ 368 u8 iscsi_response; 369 /* Logout reason when iscsi_opcode == ISCSI_INIT_LOGOUT_CMND */ 370 u8 logout_reason; 371 /* Logout response code when iscsi_opcode == ISCSI_INIT_LOGOUT_CMND */ 372 u8 logout_response; 373 /* MaxCmdSN has been incremented */ 374 u8 maxcmdsn_inc; 375 /* Immediate Unsolicited Dataout */ 376 u8 unsolicited_data; 377 /* Reject reason code */ 378 u8 reject_reason; 379 /* CID contained in logout PDU when opcode == ISCSI_INIT_LOGOUT_CMND */ 380 u16 logout_cid; 381 /* Command flags */ 382 enum cmd_flags_table cmd_flags; 383 /* Initiator Task Tag assigned from Initiator */ 384 itt_t init_task_tag; 385 /* Target Transfer Tag assigned from Target */ 386 u32 targ_xfer_tag; 387 /* CmdSN assigned from Initiator */ 388 u32 cmd_sn; 389 /* ExpStatSN assigned from Initiator */ 390 u32 exp_stat_sn; 391 /* StatSN assigned to this ITT */ 392 u32 stat_sn; 393 /* DataSN Counter */ 394 u32 data_sn; 395 /* R2TSN Counter */ 396 u32 r2t_sn; 397 /* Last DataSN acknowledged via DataAck SNACK */ 398 u32 acked_data_sn; 399 /* Used for echoing NOPOUT ping data */ 400 u32 buf_ptr_size; 401 /* Used to store DataDigest */ 402 u32 data_crc; 403 /* Counter for MaxOutstandingR2T */ 404 u32 outstanding_r2ts; 405 /* Next R2T Offset when DataSequenceInOrder=Yes */ 406 u32 r2t_offset; 407 /* Iovec current and orig count for iscsi_cmd->iov_data */ 408 u32 iov_data_count; 409 u32 orig_iov_data_count; 410 /* Number of miscellaneous iovecs used for IP stack calls */ 411 u32 iov_misc_count; 412 /* Number of struct iscsi_pdu in struct iscsi_cmd->pdu_list */ 413 u32 pdu_count; 414 /* Next struct iscsi_pdu to send in struct iscsi_cmd->pdu_list */ 415 u32 pdu_send_order; 416 /* Current struct iscsi_pdu in struct iscsi_cmd->pdu_list */ 417 u32 pdu_start; 418 /* Next struct iscsi_seq to send in struct iscsi_cmd->seq_list */ 419 u32 seq_send_order; 420 /* Number of struct iscsi_seq in struct iscsi_cmd->seq_list */ 421 u32 seq_count; 422 /* Current struct iscsi_seq in struct iscsi_cmd->seq_list */ 423 u32 seq_no; 424 /* Lowest offset in current DataOUT sequence */ 425 u32 seq_start_offset; 426 /* Highest offset in current DataOUT sequence */ 427 u32 seq_end_offset; 428 /* Total size in bytes received so far of READ data */ 429 u32 read_data_done; 430 /* Total size in bytes received so far of WRITE data */ 431 u32 write_data_done; 432 /* Counter for FirstBurstLength key */ 433 u32 first_burst_len; 434 /* Counter for MaxBurstLength key */ 435 u32 next_burst_len; 436 /* Transfer size used for IP stack calls */ 437 u32 tx_size; 438 /* Buffer used for various purposes */ 439 void *buf_ptr; 440 /* Used by SendTargets=[iqn.,eui.] discovery */ 441 void *text_in_ptr; 442 /* See include/linux/dma-mapping.h */ 443 enum dma_data_direction data_direction; 444 /* iSCSI PDU Header + CRC */ 445 unsigned char pdu[ISCSI_HDR_LEN + ISCSI_CRC_LEN]; 446 /* Number of times struct iscsi_cmd is present in immediate queue */ 447 atomic_t immed_queue_count; 448 atomic_t response_queue_count; 449 spinlock_t datain_lock; 450 spinlock_t dataout_timeout_lock; 451 /* spinlock for protecting struct iscsi_cmd->i_state */ 452 spinlock_t istate_lock; 453 /* spinlock for adding within command recovery entries */ 454 spinlock_t error_lock; 455 /* spinlock for adding R2Ts */ 456 spinlock_t r2t_lock; 457 /* DataIN List */ 458 struct list_head datain_list; 459 /* R2T List */ 460 struct list_head cmd_r2t_list; 461 /* Timer for DataOUT */ 462 struct timer_list dataout_timer; 463 /* Iovecs for SCSI data payload RX/TX w/ kernel level sockets */ 464 struct kvec *iov_data; 465 /* Iovecs for miscellaneous purposes */ 466#define ISCSI_MISC_IOVECS 5 467 struct kvec iov_misc[ISCSI_MISC_IOVECS]; 468 /* Array of struct iscsi_pdu used for DataPDUInOrder=No */ 469 struct iscsi_pdu *pdu_list; 470 /* Current struct iscsi_pdu used for DataPDUInOrder=No */ 471 struct iscsi_pdu *pdu_ptr; 472 /* Array of struct iscsi_seq used for DataSequenceInOrder=No */ 473 struct iscsi_seq *seq_list; 474 /* Current struct iscsi_seq used for DataSequenceInOrder=No */ 475 struct iscsi_seq *seq_ptr; 476 /* TMR Request when iscsi_opcode == ISCSI_OP_SCSI_TMFUNC */ 477 struct iscsi_tmr_req *tmr_req; 478 /* Connection this command is alligient to */ 479 struct iscsi_conn *conn; 480 /* Pointer to connection recovery entry */ 481 struct iscsi_conn_recovery *cr; 482 /* Session the command is part of, used for connection recovery */ 483 struct iscsi_session *sess; 484 /* list_head for connection list */ 485 struct list_head i_conn_node; 486 /* The TCM I/O descriptor that is accessed via container_of() */ 487 struct se_cmd se_cmd; 488 /* Sense buffer that will be mapped into outgoing status */ 489#define ISCSI_SENSE_BUFFER_LEN (TRANSPORT_SENSE_BUFFER + 2) 490 unsigned char sense_buffer[ISCSI_SENSE_BUFFER_LEN]; 491 492 u32 padding; 493 u8 pad_bytes[4]; 494 495 struct scatterlist *first_data_sg; 496 u32 first_data_sg_off; 497 u32 kmapped_nents; 498 sense_reason_t sense_reason; 499} ____cacheline_aligned; 500 501struct iscsi_tmr_req { 502 bool task_reassign:1; 503 u32 exp_data_sn; 504 struct iscsi_cmd *ref_cmd; 505 struct iscsi_conn_recovery *conn_recovery; 506 struct se_tmr_req *se_tmr_req; 507}; 508 509struct iscsi_conn { 510 wait_queue_head_t queues_wq; 511 /* Authentication Successful for this connection */ 512 u8 auth_complete; 513 /* State connection is currently in */ 514 u8 conn_state; 515 u8 conn_logout_reason; 516 u8 network_transport; 517 enum iscsi_timer_flags_table nopin_timer_flags; 518 enum iscsi_timer_flags_table nopin_response_timer_flags; 519 /* Used to know what thread encountered a transport failure */ 520 u8 which_thread; 521 /* connection id assigned by the Initiator */ 522 u16 cid; 523 /* Remote TCP Port */ 524 u16 login_port; 525 u16 local_port; 526 int net_size; 527 int login_family; 528 u32 auth_id; 529 u32 conn_flags; 530 /* Used for iscsi_tx_login_rsp() */ 531 itt_t login_itt; 532 u32 exp_statsn; 533 /* Per connection status sequence number */ 534 u32 stat_sn; 535 /* IFMarkInt's Current Value */ 536 u32 if_marker; 537 /* OFMarkInt's Current Value */ 538 u32 of_marker; 539 /* Used for calculating OFMarker offset to next PDU */ 540 u32 of_marker_offset; 541#define IPV6_ADDRESS_SPACE 48 542 unsigned char login_ip[IPV6_ADDRESS_SPACE]; 543 unsigned char local_ip[IPV6_ADDRESS_SPACE]; 544 int conn_usage_count; 545 int conn_waiting_on_uc; 546 atomic_t check_immediate_queue; 547 atomic_t conn_logout_remove; 548 atomic_t connection_exit; 549 atomic_t connection_recovery; 550 atomic_t connection_reinstatement; 551 atomic_t connection_wait_rcfr; 552 atomic_t sleep_on_conn_wait_comp; 553 atomic_t transport_failed; 554 struct completion conn_post_wait_comp; 555 struct completion conn_wait_comp; 556 struct completion conn_wait_rcfr_comp; 557 struct completion conn_waiting_on_uc_comp; 558 struct completion conn_logout_comp; 559 struct completion tx_half_close_comp; 560 struct completion rx_half_close_comp; 561 /* socket used by this connection */ 562 struct socket *sock; 563 void (*orig_data_ready)(struct sock *); 564 void (*orig_state_change)(struct sock *); 565#define LOGIN_FLAGS_READ_ACTIVE 1 566#define LOGIN_FLAGS_CLOSED 2 567#define LOGIN_FLAGS_READY 4 568 unsigned long login_flags; 569 struct delayed_work login_work; 570 struct delayed_work login_cleanup_work; 571 struct iscsi_login *login; 572 struct timer_list nopin_timer; 573 struct timer_list nopin_response_timer; 574 struct timer_list transport_timer; 575 struct task_struct *login_kworker; 576 /* Spinlock used for add/deleting cmd's from conn_cmd_list */ 577 spinlock_t cmd_lock; 578 spinlock_t conn_usage_lock; 579 spinlock_t immed_queue_lock; 580 spinlock_t nopin_timer_lock; 581 spinlock_t response_queue_lock; 582 spinlock_t state_lock; 583 /* libcrypto RX and TX contexts for crc32c */ 584 struct hash_desc conn_rx_hash; 585 struct hash_desc conn_tx_hash; 586 /* Used for scheduling TX and RX connection kthreads */ 587 cpumask_var_t conn_cpumask; 588 unsigned int conn_rx_reset_cpumask:1; 589 unsigned int conn_tx_reset_cpumask:1; 590 /* list_head of struct iscsi_cmd for this connection */ 591 struct list_head conn_cmd_list; 592 struct list_head immed_queue_list; 593 struct list_head response_queue_list; 594 struct iscsi_conn_ops *conn_ops; 595 struct iscsi_login *conn_login; 596 struct iscsit_transport *conn_transport; 597 struct iscsi_param_list *param_list; 598 /* Used for per connection auth state machine */ 599 void *auth_protocol; 600 void *context; 601 struct iscsi_login_thread_s *login_thread; 602 struct iscsi_portal_group *tpg; 603 struct iscsi_tpg_np *tpg_np; 604 /* Pointer to parent session */ 605 struct iscsi_session *sess; 606 int bitmap_id; 607 int rx_thread_active; 608 struct task_struct *rx_thread; 609 struct completion rx_login_comp; 610 int tx_thread_active; 611 struct task_struct *tx_thread; 612 /* list_head for session connection list */ 613 struct list_head conn_list; 614} ____cacheline_aligned; 615 616struct iscsi_conn_recovery { 617 u16 cid; 618 u32 cmd_count; 619 u32 maxrecvdatasegmentlength; 620 u32 maxxmitdatasegmentlength; 621 int ready_for_reallegiance; 622 struct list_head conn_recovery_cmd_list; 623 spinlock_t conn_recovery_cmd_lock; 624 struct timer_list time2retain_timer; 625 struct iscsi_session *sess; 626 struct list_head cr_list; 627} ____cacheline_aligned; 628 629struct iscsi_session { 630 u8 initiator_vendor; 631 u8 isid[6]; 632 enum iscsi_timer_flags_table time2retain_timer_flags; 633 u8 version_active; 634 u16 cid_called; 635 u16 conn_recovery_count; 636 u16 tsih; 637 /* state session is currently in */ 638 u32 session_state; 639 /* session wide counter: initiator assigned task tag */ 640 itt_t init_task_tag; 641 /* session wide counter: target assigned task tag */ 642 u32 targ_xfer_tag; 643 u32 cmdsn_window; 644 645 /* protects cmdsn values */ 646 struct mutex cmdsn_mutex; 647 /* session wide counter: expected command sequence number */ 648 u32 exp_cmd_sn; 649 /* session wide counter: maximum allowed command sequence number */ 650 u32 max_cmd_sn; 651 struct list_head sess_ooo_cmdsn_list; 652 653 /* LIO specific session ID */ 654 u32 sid; 655 char auth_type[8]; 656 /* unique within the target */ 657 int session_index; 658 /* Used for session reference counting */ 659 int session_usage_count; 660 int session_waiting_on_uc; 661 atomic_long_t cmd_pdus; 662 atomic_long_t rsp_pdus; 663 atomic_long_t tx_data_octets; 664 atomic_long_t rx_data_octets; 665 atomic_long_t conn_digest_errors; 666 atomic_long_t conn_timeout_errors; 667 u64 creation_time; 668 /* Number of active connections */ 669 atomic_t nconn; 670 atomic_t session_continuation; 671 atomic_t session_fall_back_to_erl0; 672 atomic_t session_logout; 673 atomic_t session_reinstatement; 674 atomic_t session_stop_active; 675 atomic_t sleep_on_sess_wait_comp; 676 /* connection list */ 677 struct list_head sess_conn_list; 678 struct list_head cr_active_list; 679 struct list_head cr_inactive_list; 680 spinlock_t conn_lock; 681 spinlock_t cr_a_lock; 682 spinlock_t cr_i_lock; 683 spinlock_t session_usage_lock; 684 spinlock_t ttt_lock; 685 struct completion async_msg_comp; 686 struct completion reinstatement_comp; 687 struct completion session_wait_comp; 688 struct completion session_waiting_on_uc_comp; 689 struct timer_list time2retain_timer; 690 struct iscsi_sess_ops *sess_ops; 691 struct se_session *se_sess; 692 struct iscsi_portal_group *tpg; 693} ____cacheline_aligned; 694 695struct iscsi_login { 696 u8 auth_complete; 697 u8 checked_for_existing; 698 u8 current_stage; 699 u8 leading_connection; 700 u8 first_request; 701 u8 version_min; 702 u8 version_max; 703 u8 login_complete; 704 u8 login_failed; 705 bool zero_tsih; 706 char isid[6]; 707 u32 cmd_sn; 708 itt_t init_task_tag; 709 u32 initial_exp_statsn; 710 u32 rsp_length; 711 u16 cid; 712 u16 tsih; 713 char req[ISCSI_HDR_LEN]; 714 char rsp[ISCSI_HDR_LEN]; 715 char *req_buf; 716 char *rsp_buf; 717 struct iscsi_conn *conn; 718 struct iscsi_np *np; 719} ____cacheline_aligned; 720 721struct iscsi_node_attrib { 722 u32 dataout_timeout; 723 u32 dataout_timeout_retries; 724 u32 default_erl; 725 u32 nopin_timeout; 726 u32 nopin_response_timeout; 727 u32 random_datain_pdu_offsets; 728 u32 random_datain_seq_offsets; 729 u32 random_r2t_offsets; 730 u32 tmr_cold_reset; 731 u32 tmr_warm_reset; 732 struct iscsi_node_acl *nacl; 733}; 734 735struct se_dev_entry_s; 736 737struct iscsi_node_auth { 738 enum naf_flags_table naf_flags; 739 int authenticate_target; 740 /* Used for iscsit_global->discovery_auth, 741 * set to zero (auth disabled) by default */ 742 int enforce_discovery_auth; 743#define MAX_USER_LEN 256 744#define MAX_PASS_LEN 256 745 char userid[MAX_USER_LEN]; 746 char password[MAX_PASS_LEN]; 747 char userid_mutual[MAX_USER_LEN]; 748 char password_mutual[MAX_PASS_LEN]; 749}; 750 751#include "iscsi_target_stat.h" 752 753struct iscsi_node_stat_grps { 754 struct config_group iscsi_sess_stats_group; 755 struct config_group iscsi_conn_stats_group; 756}; 757 758struct iscsi_node_acl { 759 struct iscsi_node_attrib node_attrib; 760 struct iscsi_node_auth node_auth; 761 struct iscsi_node_stat_grps node_stat_grps; 762 struct se_node_acl se_node_acl; 763}; 764 765struct iscsi_tpg_attrib { 766 u32 authentication; 767 u32 login_timeout; 768 u32 netif_timeout; 769 u32 generate_node_acls; 770 u32 cache_dynamic_acls; 771 u32 default_cmdsn_depth; 772 u32 demo_mode_write_protect; 773 u32 prod_mode_write_protect; 774 u32 demo_mode_discovery; 775 u32 default_erl; 776 u8 t10_pi; 777 u32 fabric_prot_type; 778 struct iscsi_portal_group *tpg; 779}; 780 781struct iscsi_np { 782 int np_network_transport; 783 int np_ip_proto; 784 int np_sock_type; 785 enum np_thread_state_table np_thread_state; 786 bool enabled; 787 enum iscsi_timer_flags_table np_login_timer_flags; 788 u32 np_exports; 789 enum np_flags_table np_flags; 790 u16 np_port; 791 spinlock_t np_thread_lock; 792 struct completion np_restart_comp; 793 struct socket *np_socket; 794 struct __kernel_sockaddr_storage np_sockaddr; 795 struct task_struct *np_thread; 796 struct timer_list np_login_timer; 797 void *np_context; 798 struct iscsit_transport *np_transport; 799 struct list_head np_list; 800} ____cacheline_aligned; 801 802struct iscsi_tpg_np { 803 struct iscsi_np *tpg_np; 804 struct iscsi_portal_group *tpg; 805 struct iscsi_tpg_np *tpg_np_parent; 806 struct list_head tpg_np_list; 807 struct list_head tpg_np_child_list; 808 struct list_head tpg_np_parent_list; 809 struct se_tpg_np se_tpg_np; 810 spinlock_t tpg_np_parent_lock; 811 struct completion tpg_np_comp; 812 struct kref tpg_np_kref; 813}; 814 815struct iscsi_portal_group { 816 unsigned char tpg_chap_id; 817 /* TPG State */ 818 enum tpg_state_table tpg_state; 819 /* Target Portal Group Tag */ 820 u16 tpgt; 821 /* Id assigned to target sessions */ 822 u16 ntsih; 823 /* Number of active sessions */ 824 u32 nsessions; 825 /* Number of Network Portals available for this TPG */ 826 u32 num_tpg_nps; 827 /* Per TPG LIO specific session ID. */ 828 u32 sid; 829 /* Spinlock for adding/removing Network Portals */ 830 spinlock_t tpg_np_lock; 831 spinlock_t tpg_state_lock; 832 struct se_portal_group tpg_se_tpg; 833 struct mutex tpg_access_lock; 834 struct semaphore np_login_sem; 835 struct iscsi_tpg_attrib tpg_attrib; 836 struct iscsi_node_auth tpg_demo_auth; 837 /* Pointer to default list of iSCSI parameters for TPG */ 838 struct iscsi_param_list *param_list; 839 struct iscsi_tiqn *tpg_tiqn; 840 struct list_head tpg_gnp_list; 841 struct list_head tpg_list; 842} ____cacheline_aligned; 843 844struct iscsi_wwn_stat_grps { 845 struct config_group iscsi_stat_group; 846 struct config_group iscsi_instance_group; 847 struct config_group iscsi_sess_err_group; 848 struct config_group iscsi_tgt_attr_group; 849 struct config_group iscsi_login_stats_group; 850 struct config_group iscsi_logout_stats_group; 851}; 852 853struct iscsi_tiqn { 854#define ISCSI_IQN_LEN 224 855 unsigned char tiqn[ISCSI_IQN_LEN]; 856 enum tiqn_state_table tiqn_state; 857 int tiqn_access_count; 858 u32 tiqn_active_tpgs; 859 u32 tiqn_ntpgs; 860 u32 tiqn_num_tpg_nps; 861 u32 tiqn_nsessions; 862 struct list_head tiqn_list; 863 struct list_head tiqn_tpg_list; 864 spinlock_t tiqn_state_lock; 865 spinlock_t tiqn_tpg_lock; 866 struct se_wwn tiqn_wwn; 867 struct iscsi_wwn_stat_grps tiqn_stat_grps; 868 int tiqn_index; 869 struct iscsi_sess_err_stats sess_err_stats; 870 struct iscsi_login_stats login_stats; 871 struct iscsi_logout_stats logout_stats; 872} ____cacheline_aligned; 873 874struct iscsit_global { 875 /* In core shutdown */ 876 u32 in_shutdown; 877 u32 active_ts; 878 /* Unique identifier used for the authentication daemon */ 879 u32 auth_id; 880 u32 inactive_ts; 881#define ISCSIT_BITMAP_BITS 262144 882 /* Thread Set bitmap pointer */ 883 unsigned long *ts_bitmap; 884 spinlock_t ts_bitmap_lock; 885 /* Used for iSCSI discovery session authentication */ 886 struct iscsi_node_acl discovery_acl; 887 struct iscsi_portal_group *discovery_tpg; 888}; 889 890static inline u32 session_get_next_ttt(struct iscsi_session *session) 891{ 892 u32 ttt; 893 894 spin_lock_bh(&session->ttt_lock); 895 ttt = session->targ_xfer_tag++; 896 if (ttt == 0xFFFFFFFF) 897 ttt = session->targ_xfer_tag++; 898 spin_unlock_bh(&session->ttt_lock); 899 900 return ttt; 901} 902 903extern struct iscsi_cmd *iscsit_find_cmd_from_itt(struct iscsi_conn *, itt_t); 904#endif /* ISCSI_TARGET_CORE_H */ 905