/drivers/target/iscsi/iscsi_target_core.h
C Header | 858 lines | 667 code | 60 blank | 131 comment | 0 complexity | 8fa20aa7a7d4047bb89ba0671abafe2c MD5 | raw file
Possible License(s): LGPL-2.0, AGPL-1.0, GPL-2.0
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-rc1" 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 5 29#define NA_NOPIN_TIMEOUT_MAX 60 30#define NA_NOPIN_TIMEOUT_MIN 3 31#define NA_NOPIN_RESPONSE_TIMEOUT 5 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 60enum tpg_np_network_transport_table { 61 ISCSI_TCP = 0, 62 ISCSI_SCTP_TCP = 1, 63 ISCSI_SCTP_UDP = 2, 64 ISCSI_IWARP_TCP = 3, 65 ISCSI_IWARP_SCTP = 4, 66 ISCSI_INFINIBAND = 5, 67}; 68 69/* RFC-3720 7.1.4 Standard Connection State Diagram for a Target */ 70enum target_conn_state_table { 71 TARG_CONN_STATE_FREE = 0x1, 72 TARG_CONN_STATE_XPT_UP = 0x3, 73 TARG_CONN_STATE_IN_LOGIN = 0x4, 74 TARG_CONN_STATE_LOGGED_IN = 0x5, 75 TARG_CONN_STATE_IN_LOGOUT = 0x6, 76 TARG_CONN_STATE_LOGOUT_REQUESTED = 0x7, 77 TARG_CONN_STATE_CLEANUP_WAIT = 0x8, 78}; 79 80/* RFC-3720 7.3.2 Session State Diagram for a Target */ 81enum target_sess_state_table { 82 TARG_SESS_STATE_FREE = 0x1, 83 TARG_SESS_STATE_ACTIVE = 0x2, 84 TARG_SESS_STATE_LOGGED_IN = 0x3, 85 TARG_SESS_STATE_FAILED = 0x4, 86 TARG_SESS_STATE_IN_CONTINUE = 0x5, 87}; 88 89/* struct iscsi_data_count->type */ 90enum data_count_type { 91 ISCSI_RX_DATA = 1, 92 ISCSI_TX_DATA = 2, 93}; 94 95/* struct iscsi_datain_req->dr_complete */ 96enum datain_req_comp_table { 97 DATAIN_COMPLETE_NORMAL = 1, 98 DATAIN_COMPLETE_WITHIN_COMMAND_RECOVERY = 2, 99 DATAIN_COMPLETE_CONNECTION_RECOVERY = 3, 100}; 101 102/* struct iscsi_datain_req->recovery */ 103enum datain_req_rec_table { 104 DATAIN_WITHIN_COMMAND_RECOVERY = 1, 105 DATAIN_CONNECTION_RECOVERY = 2, 106}; 107 108/* struct iscsi_portal_group->state */ 109enum tpg_state_table { 110 TPG_STATE_FREE = 0, 111 TPG_STATE_ACTIVE = 1, 112 TPG_STATE_INACTIVE = 2, 113 TPG_STATE_COLD_RESET = 3, 114}; 115 116/* struct iscsi_tiqn->tiqn_state */ 117enum tiqn_state_table { 118 TIQN_STATE_ACTIVE = 1, 119 TIQN_STATE_SHUTDOWN = 2, 120}; 121 122/* struct iscsi_cmd->cmd_flags */ 123enum cmd_flags_table { 124 ICF_GOT_LAST_DATAOUT = 0x00000001, 125 ICF_GOT_DATACK_SNACK = 0x00000002, 126 ICF_NON_IMMEDIATE_UNSOLICITED_DATA = 0x00000004, 127 ICF_SENT_LAST_R2T = 0x00000008, 128 ICF_WITHIN_COMMAND_RECOVERY = 0x00000010, 129 ICF_CONTIG_MEMORY = 0x00000020, 130 ICF_ATTACHED_TO_RQUEUE = 0x00000040, 131 ICF_OOO_CMDSN = 0x00000080, 132 ICF_REJECT_FAIL_CONN = 0x00000100, 133}; 134 135/* struct iscsi_cmd->i_state */ 136enum cmd_i_state_table { 137 ISTATE_NO_STATE = 0, 138 ISTATE_NEW_CMD = 1, 139 ISTATE_DEFERRED_CMD = 2, 140 ISTATE_UNSOLICITED_DATA = 3, 141 ISTATE_RECEIVE_DATAOUT = 4, 142 ISTATE_RECEIVE_DATAOUT_RECOVERY = 5, 143 ISTATE_RECEIVED_LAST_DATAOUT = 6, 144 ISTATE_WITHIN_DATAOUT_RECOVERY = 7, 145 ISTATE_IN_CONNECTION_RECOVERY = 8, 146 ISTATE_RECEIVED_TASKMGT = 9, 147 ISTATE_SEND_ASYNCMSG = 10, 148 ISTATE_SENT_ASYNCMSG = 11, 149 ISTATE_SEND_DATAIN = 12, 150 ISTATE_SEND_LAST_DATAIN = 13, 151 ISTATE_SENT_LAST_DATAIN = 14, 152 ISTATE_SEND_LOGOUTRSP = 15, 153 ISTATE_SENT_LOGOUTRSP = 16, 154 ISTATE_SEND_NOPIN = 17, 155 ISTATE_SENT_NOPIN = 18, 156 ISTATE_SEND_REJECT = 19, 157 ISTATE_SENT_REJECT = 20, 158 ISTATE_SEND_R2T = 21, 159 ISTATE_SENT_R2T = 22, 160 ISTATE_SEND_R2T_RECOVERY = 23, 161 ISTATE_SENT_R2T_RECOVERY = 24, 162 ISTATE_SEND_LAST_R2T = 25, 163 ISTATE_SENT_LAST_R2T = 26, 164 ISTATE_SEND_LAST_R2T_RECOVERY = 27, 165 ISTATE_SENT_LAST_R2T_RECOVERY = 28, 166 ISTATE_SEND_STATUS = 29, 167 ISTATE_SEND_STATUS_BROKEN_PC = 30, 168 ISTATE_SENT_STATUS = 31, 169 ISTATE_SEND_STATUS_RECOVERY = 32, 170 ISTATE_SENT_STATUS_RECOVERY = 33, 171 ISTATE_SEND_TASKMGTRSP = 34, 172 ISTATE_SENT_TASKMGTRSP = 35, 173 ISTATE_SEND_TEXTRSP = 36, 174 ISTATE_SENT_TEXTRSP = 37, 175 ISTATE_SEND_NOPIN_WANT_RESPONSE = 38, 176 ISTATE_SENT_NOPIN_WANT_RESPONSE = 39, 177 ISTATE_SEND_NOPIN_NO_RESPONSE = 40, 178 ISTATE_REMOVE = 41, 179 ISTATE_FREE = 42, 180}; 181 182/* Used for iscsi_recover_cmdsn() return values */ 183enum recover_cmdsn_ret_table { 184 CMDSN_ERROR_CANNOT_RECOVER = -1, 185 CMDSN_NORMAL_OPERATION = 0, 186 CMDSN_LOWER_THAN_EXP = 1, 187 CMDSN_HIGHER_THAN_EXP = 2, 188}; 189 190/* Used for iscsi_handle_immediate_data() return values */ 191enum immedate_data_ret_table { 192 IMMEDIATE_DATA_CANNOT_RECOVER = -1, 193 IMMEDIATE_DATA_NORMAL_OPERATION = 0, 194 IMMEDIATE_DATA_ERL1_CRC_FAILURE = 1, 195}; 196 197/* Used for iscsi_decide_dataout_action() return values */ 198enum dataout_action_ret_table { 199 DATAOUT_CANNOT_RECOVER = -1, 200 DATAOUT_NORMAL = 0, 201 DATAOUT_SEND_R2T = 1, 202 DATAOUT_SEND_TO_TRANSPORT = 2, 203 DATAOUT_WITHIN_COMMAND_RECOVERY = 3, 204}; 205 206/* Used for struct iscsi_node_auth->naf_flags */ 207enum naf_flags_table { 208 NAF_USERID_SET = 0x01, 209 NAF_PASSWORD_SET = 0x02, 210 NAF_USERID_IN_SET = 0x04, 211 NAF_PASSWORD_IN_SET = 0x08, 212}; 213 214/* Used by various struct timer_list to manage iSCSI specific state */ 215enum iscsi_timer_flags_table { 216 ISCSI_TF_RUNNING = 0x01, 217 ISCSI_TF_STOP = 0x02, 218 ISCSI_TF_EXPIRED = 0x04, 219}; 220 221/* Used for struct iscsi_np->np_flags */ 222enum np_flags_table { 223 NPF_IP_NETWORK = 0x00, 224 NPF_SCTP_STRUCT_FILE = 0x01 /* Bugfix */ 225}; 226 227/* Used for struct iscsi_np->np_thread_state */ 228enum np_thread_state_table { 229 ISCSI_NP_THREAD_ACTIVE = 1, 230 ISCSI_NP_THREAD_INACTIVE = 2, 231 ISCSI_NP_THREAD_RESET = 3, 232 ISCSI_NP_THREAD_SHUTDOWN = 4, 233 ISCSI_NP_THREAD_EXIT = 5, 234}; 235 236struct iscsi_conn_ops { 237 u8 HeaderDigest; /* [0,1] == [None,CRC32C] */ 238 u8 DataDigest; /* [0,1] == [None,CRC32C] */ 239 u32 MaxRecvDataSegmentLength; /* [512..2**24-1] */ 240 u8 OFMarker; /* [0,1] == [No,Yes] */ 241 u8 IFMarker; /* [0,1] == [No,Yes] */ 242 u32 OFMarkInt; /* [1..65535] */ 243 u32 IFMarkInt; /* [1..65535] */ 244}; 245 246struct iscsi_sess_ops { 247 char InitiatorName[224]; 248 char InitiatorAlias[256]; 249 char TargetName[224]; 250 char TargetAlias[256]; 251 char TargetAddress[256]; 252 u16 TargetPortalGroupTag; /* [0..65535] */ 253 u16 MaxConnections; /* [1..65535] */ 254 u8 InitialR2T; /* [0,1] == [No,Yes] */ 255 u8 ImmediateData; /* [0,1] == [No,Yes] */ 256 u32 MaxBurstLength; /* [512..2**24-1] */ 257 u32 FirstBurstLength; /* [512..2**24-1] */ 258 u16 DefaultTime2Wait; /* [0..3600] */ 259 u16 DefaultTime2Retain; /* [0..3600] */ 260 u16 MaxOutstandingR2T; /* [1..65535] */ 261 u8 DataPDUInOrder; /* [0,1] == [No,Yes] */ 262 u8 DataSequenceInOrder; /* [0,1] == [No,Yes] */ 263 u8 ErrorRecoveryLevel; /* [0..2] */ 264 u8 SessionType; /* [0,1] == [Normal,Discovery]*/ 265}; 266 267struct iscsi_queue_req { 268 int state; 269 struct iscsi_cmd *cmd; 270 struct list_head qr_list; 271}; 272 273struct iscsi_data_count { 274 int data_length; 275 int sync_and_steering; 276 enum data_count_type type; 277 u32 iov_count; 278 u32 ss_iov_count; 279 u32 ss_marker_count; 280 struct kvec *iov; 281}; 282 283struct iscsi_param_list { 284 struct list_head param_list; 285 struct list_head extra_response_list; 286}; 287 288struct iscsi_datain_req { 289 enum datain_req_comp_table dr_complete; 290 int generate_recovery_values; 291 enum datain_req_rec_table recovery; 292 u32 begrun; 293 u32 runlength; 294 u32 data_length; 295 u32 data_offset; 296 u32 data_offset_end; 297 u32 data_sn; 298 u32 next_burst_len; 299 u32 read_data_done; 300 u32 seq_send_order; 301 struct list_head dr_list; 302} ____cacheline_aligned; 303 304struct iscsi_ooo_cmdsn { 305 u16 cid; 306 u32 batch_count; 307 u32 cmdsn; 308 u32 exp_cmdsn; 309 struct iscsi_cmd *cmd; 310 struct list_head ooo_list; 311} ____cacheline_aligned; 312 313struct iscsi_datain { 314 u8 flags; 315 u32 data_sn; 316 u32 length; 317 u32 offset; 318} ____cacheline_aligned; 319 320struct iscsi_r2t { 321 int seq_complete; 322 int recovery_r2t; 323 int sent_r2t; 324 u32 r2t_sn; 325 u32 offset; 326 u32 targ_xfer_tag; 327 u32 xfer_len; 328 struct list_head r2t_list; 329} ____cacheline_aligned; 330 331struct iscsi_cmd { 332 enum iscsi_timer_flags_table dataout_timer_flags; 333 /* DataOUT timeout retries */ 334 u8 dataout_timeout_retries; 335 /* Within command recovery count */ 336 u8 error_recovery_count; 337 /* iSCSI dependent state for out or order CmdSNs */ 338 enum cmd_i_state_table deferred_i_state; 339 /* iSCSI dependent state */ 340 enum cmd_i_state_table i_state; 341 /* Command is an immediate command (ISCSI_OP_IMMEDIATE set) */ 342 u8 immediate_cmd; 343 /* Immediate data present */ 344 u8 immediate_data; 345 /* iSCSI Opcode */ 346 u8 iscsi_opcode; 347 /* iSCSI Response Code */ 348 u8 iscsi_response; 349 /* Logout reason when iscsi_opcode == ISCSI_INIT_LOGOUT_CMND */ 350 u8 logout_reason; 351 /* Logout response code when iscsi_opcode == ISCSI_INIT_LOGOUT_CMND */ 352 u8 logout_response; 353 /* MaxCmdSN has been incremented */ 354 u8 maxcmdsn_inc; 355 /* Immediate Unsolicited Dataout */ 356 u8 unsolicited_data; 357 /* CID contained in logout PDU when opcode == ISCSI_INIT_LOGOUT_CMND */ 358 u16 logout_cid; 359 /* Command flags */ 360 enum cmd_flags_table cmd_flags; 361 /* Initiator Task Tag assigned from Initiator */ 362 u32 init_task_tag; 363 /* Target Transfer Tag assigned from Target */ 364 u32 targ_xfer_tag; 365 /* CmdSN assigned from Initiator */ 366 u32 cmd_sn; 367 /* ExpStatSN assigned from Initiator */ 368 u32 exp_stat_sn; 369 /* StatSN assigned to this ITT */ 370 u32 stat_sn; 371 /* DataSN Counter */ 372 u32 data_sn; 373 /* R2TSN Counter */ 374 u32 r2t_sn; 375 /* Last DataSN acknowledged via DataAck SNACK */ 376 u32 acked_data_sn; 377 /* Used for echoing NOPOUT ping data */ 378 u32 buf_ptr_size; 379 /* Used to store DataDigest */ 380 u32 data_crc; 381 /* Total size in bytes associated with command */ 382 u32 data_length; 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 atomic_t transport_sent; 428 spinlock_t datain_lock; 429 spinlock_t dataout_timeout_lock; 430 /* spinlock for protecting struct iscsi_cmd->i_state */ 431 spinlock_t istate_lock; 432 /* spinlock for adding within command recovery entries */ 433 spinlock_t error_lock; 434 /* spinlock for adding R2Ts */ 435 spinlock_t r2t_lock; 436 /* DataIN List */ 437 struct list_head datain_list; 438 /* R2T List */ 439 struct list_head cmd_r2t_list; 440 struct completion reject_comp; 441 /* Timer for DataOUT */ 442 struct timer_list dataout_timer; 443 /* Iovecs for SCSI data payload RX/TX w/ kernel level sockets */ 444 struct kvec *iov_data; 445 /* Iovecs for miscellaneous purposes */ 446#define ISCSI_MISC_IOVECS 5 447 struct kvec iov_misc[ISCSI_MISC_IOVECS]; 448 /* Array of struct iscsi_pdu used for DataPDUInOrder=No */ 449 struct iscsi_pdu *pdu_list; 450 /* Current struct iscsi_pdu used for DataPDUInOrder=No */ 451 struct iscsi_pdu *pdu_ptr; 452 /* Array of struct iscsi_seq used for DataSequenceInOrder=No */ 453 struct iscsi_seq *seq_list; 454 /* Current struct iscsi_seq used for DataSequenceInOrder=No */ 455 struct iscsi_seq *seq_ptr; 456 /* TMR Request when iscsi_opcode == ISCSI_OP_SCSI_TMFUNC */ 457 struct iscsi_tmr_req *tmr_req; 458 /* Connection this command is alligient to */ 459 struct iscsi_conn *conn; 460 /* Pointer to connection recovery entry */ 461 struct iscsi_conn_recovery *cr; 462 /* Session the command is part of, used for connection recovery */ 463 struct iscsi_session *sess; 464 /* list_head for connection list */ 465 struct list_head i_list; 466 /* The TCM I/O descriptor that is accessed via container_of() */ 467 struct se_cmd se_cmd; 468 /* Sense buffer that will be mapped into outgoing status */ 469#define ISCSI_SENSE_BUFFER_LEN (TRANSPORT_SENSE_BUFFER + 2) 470 unsigned char sense_buffer[ISCSI_SENSE_BUFFER_LEN]; 471 472 struct scatterlist *t_mem_sg; 473 u32 t_mem_sg_nents; 474 475 u32 padding; 476 u8 pad_bytes[4]; 477 478 struct scatterlist *first_data_sg; 479 u32 first_data_sg_off; 480 u32 kmapped_nents; 481 482} ____cacheline_aligned; 483 484struct iscsi_tmr_req { 485 bool task_reassign:1; 486 u32 ref_cmd_sn; 487 u32 exp_data_sn; 488 struct iscsi_conn_recovery *conn_recovery; 489 struct se_tmr_req *se_tmr_req; 490}; 491 492struct iscsi_conn { 493 /* Authentication Successful for this connection */ 494 u8 auth_complete; 495 /* State connection is currently in */ 496 u8 conn_state; 497 u8 conn_logout_reason; 498 u8 network_transport; 499 enum iscsi_timer_flags_table nopin_timer_flags; 500 enum iscsi_timer_flags_table nopin_response_timer_flags; 501 u8 tx_immediate_queue; 502 u8 tx_response_queue; 503 /* Used to know what thread encountered a transport failure */ 504 u8 which_thread; 505 /* connection id assigned by the Initiator */ 506 u16 cid; 507 /* Remote TCP Port */ 508 u16 login_port; 509 int net_size; 510 u32 auth_id; 511#define CONNFLAG_SCTP_STRUCT_FILE 0x01 512 u32 conn_flags; 513 /* Used for iscsi_tx_login_rsp() */ 514 u32 login_itt; 515 u32 exp_statsn; 516 /* Per connection status sequence number */ 517 u32 stat_sn; 518 /* IFMarkInt's Current Value */ 519 u32 if_marker; 520 /* OFMarkInt's Current Value */ 521 u32 of_marker; 522 /* Used for calculating OFMarker offset to next PDU */ 523 u32 of_marker_offset; 524 /* Complete Bad PDU for sending reject */ 525 unsigned char bad_hdr[ISCSI_HDR_LEN]; 526#define IPV6_ADDRESS_SPACE 48 527 unsigned char login_ip[IPV6_ADDRESS_SPACE]; 528 int conn_usage_count; 529 int conn_waiting_on_uc; 530 atomic_t check_immediate_queue; 531 atomic_t conn_logout_remove; 532 atomic_t connection_exit; 533 atomic_t connection_recovery; 534 atomic_t connection_reinstatement; 535 atomic_t connection_wait; 536 atomic_t connection_wait_rcfr; 537 atomic_t sleep_on_conn_wait_comp; 538 atomic_t transport_failed; 539 struct completion conn_post_wait_comp; 540 struct completion conn_wait_comp; 541 struct completion conn_wait_rcfr_comp; 542 struct completion conn_waiting_on_uc_comp; 543 struct completion conn_logout_comp; 544 struct completion tx_half_close_comp; 545 struct completion rx_half_close_comp; 546 /* socket used by this connection */ 547 struct socket *sock; 548 struct timer_list nopin_timer; 549 struct timer_list nopin_response_timer; 550 struct timer_list transport_timer; 551 /* Spinlock used for add/deleting cmd's from conn_cmd_list */ 552 spinlock_t cmd_lock; 553 spinlock_t conn_usage_lock; 554 spinlock_t immed_queue_lock; 555 spinlock_t nopin_timer_lock; 556 spinlock_t response_queue_lock; 557 spinlock_t state_lock; 558 /* libcrypto RX and TX contexts for crc32c */ 559 struct hash_desc conn_rx_hash; 560 struct hash_desc conn_tx_hash; 561 /* Used for scheduling TX and RX connection kthreads */ 562 cpumask_var_t conn_cpumask; 563 int conn_rx_reset_cpumask:1; 564 int conn_tx_reset_cpumask:1; 565 /* list_head of struct iscsi_cmd for this connection */ 566 struct list_head conn_cmd_list; 567 struct list_head immed_queue_list; 568 struct list_head response_queue_list; 569 struct iscsi_conn_ops *conn_ops; 570 struct iscsi_param_list *param_list; 571 /* Used for per connection auth state machine */ 572 void *auth_protocol; 573 struct iscsi_login_thread_s *login_thread; 574 struct iscsi_portal_group *tpg; 575 /* Pointer to parent session */ 576 struct iscsi_session *sess; 577 /* Pointer to thread_set in use for this conn's threads */ 578 struct iscsi_thread_set *thread_set; 579 /* list_head for session connection list */ 580 struct list_head conn_list; 581} ____cacheline_aligned; 582 583struct iscsi_conn_recovery { 584 u16 cid; 585 u32 cmd_count; 586 u32 maxrecvdatasegmentlength; 587 int ready_for_reallegiance; 588 struct list_head conn_recovery_cmd_list; 589 spinlock_t conn_recovery_cmd_lock; 590 struct timer_list time2retain_timer; 591 struct iscsi_session *sess; 592 struct list_head cr_list; 593} ____cacheline_aligned; 594 595struct iscsi_session { 596 u8 initiator_vendor; 597 u8 isid[6]; 598 enum iscsi_timer_flags_table time2retain_timer_flags; 599 u8 version_active; 600 u16 cid_called; 601 u16 conn_recovery_count; 602 u16 tsih; 603 /* state session is currently in */ 604 u32 session_state; 605 /* session wide counter: initiator assigned task tag */ 606 u32 init_task_tag; 607 /* session wide counter: target assigned task tag */ 608 u32 targ_xfer_tag; 609 u32 cmdsn_window; 610 611 /* protects cmdsn values */ 612 struct mutex cmdsn_mutex; 613 /* session wide counter: expected command sequence number */ 614 u32 exp_cmd_sn; 615 /* session wide counter: maximum allowed command sequence number */ 616 u32 max_cmd_sn; 617 struct list_head sess_ooo_cmdsn_list; 618 619 /* LIO specific session ID */ 620 u32 sid; 621 char auth_type[8]; 622 /* unique within the target */ 623 int session_index; 624 /* Used for session reference counting */ 625 int session_usage_count; 626 int session_waiting_on_uc; 627 u32 cmd_pdus; 628 u32 rsp_pdus; 629 u64 tx_data_octets; 630 u64 rx_data_octets; 631 u32 conn_digest_errors; 632 u32 conn_timeout_errors; 633 u64 creation_time; 634 spinlock_t session_stats_lock; 635 /* Number of active connections */ 636 atomic_t nconn; 637 atomic_t session_continuation; 638 atomic_t session_fall_back_to_erl0; 639 atomic_t session_logout; 640 atomic_t session_reinstatement; 641 atomic_t session_stop_active; 642 atomic_t sleep_on_sess_wait_comp; 643 atomic_t transport_wait_cmds; 644 /* connection list */ 645 struct list_head sess_conn_list; 646 struct list_head cr_active_list; 647 struct list_head cr_inactive_list; 648 spinlock_t conn_lock; 649 spinlock_t cr_a_lock; 650 spinlock_t cr_i_lock; 651 spinlock_t session_usage_lock; 652 spinlock_t ttt_lock; 653 struct completion async_msg_comp; 654 struct completion reinstatement_comp; 655 struct completion session_wait_comp; 656 struct completion session_waiting_on_uc_comp; 657 struct timer_list time2retain_timer; 658 struct iscsi_sess_ops *sess_ops; 659 struct se_session *se_sess; 660 struct iscsi_portal_group *tpg; 661} ____cacheline_aligned; 662 663struct iscsi_login { 664 u8 auth_complete; 665 u8 checked_for_existing; 666 u8 current_stage; 667 u8 leading_connection; 668 u8 first_request; 669 u8 version_min; 670 u8 version_max; 671 char isid[6]; 672 u32 cmd_sn; 673 u32 init_task_tag; 674 u32 initial_exp_statsn; 675 u32 rsp_length; 676 u16 cid; 677 u16 tsih; 678 char *req; 679 char *rsp; 680 char *req_buf; 681 char *rsp_buf; 682} ____cacheline_aligned; 683 684struct iscsi_node_attrib { 685 u32 dataout_timeout; 686 u32 dataout_timeout_retries; 687 u32 default_erl; 688 u32 nopin_timeout; 689 u32 nopin_response_timeout; 690 u32 random_datain_pdu_offsets; 691 u32 random_datain_seq_offsets; 692 u32 random_r2t_offsets; 693 u32 tmr_cold_reset; 694 u32 tmr_warm_reset; 695 struct iscsi_node_acl *nacl; 696}; 697 698struct se_dev_entry_s; 699 700struct iscsi_node_auth { 701 enum naf_flags_table naf_flags; 702 int authenticate_target; 703 /* Used for iscsit_global->discovery_auth, 704 * set to zero (auth disabled) by default */ 705 int enforce_discovery_auth; 706#define MAX_USER_LEN 256 707#define MAX_PASS_LEN 256 708 char userid[MAX_USER_LEN]; 709 char password[MAX_PASS_LEN]; 710 char userid_mutual[MAX_USER_LEN]; 711 char password_mutual[MAX_PASS_LEN]; 712}; 713 714#include "iscsi_target_stat.h" 715 716struct iscsi_node_stat_grps { 717 struct config_group iscsi_sess_stats_group; 718 struct config_group iscsi_conn_stats_group; 719}; 720 721struct iscsi_node_acl { 722 struct iscsi_node_attrib node_attrib; 723 struct iscsi_node_auth node_auth; 724 struct iscsi_node_stat_grps node_stat_grps; 725 struct se_node_acl se_node_acl; 726}; 727 728#define NODE_STAT_GRPS(nacl) (&(nacl)->node_stat_grps) 729 730#define ISCSI_NODE_ATTRIB(t) (&(t)->node_attrib) 731#define ISCSI_NODE_AUTH(t) (&(t)->node_auth) 732 733struct iscsi_tpg_attrib { 734 u32 authentication; 735 u32 login_timeout; 736 u32 netif_timeout; 737 u32 generate_node_acls; 738 u32 cache_dynamic_acls; 739 u32 default_cmdsn_depth; 740 u32 demo_mode_write_protect; 741 u32 prod_mode_write_protect; 742 struct iscsi_portal_group *tpg; 743}; 744 745struct iscsi_np { 746 int np_network_transport; 747 int np_ip_proto; 748 int np_sock_type; 749 enum np_thread_state_table np_thread_state; 750 enum iscsi_timer_flags_table np_login_timer_flags; 751 u32 np_exports; 752 enum np_flags_table np_flags; 753 unsigned char np_ip[IPV6_ADDRESS_SPACE]; 754 u16 np_port; 755 spinlock_t np_thread_lock; 756 struct completion np_restart_comp; 757 struct socket *np_socket; 758 struct __kernel_sockaddr_storage np_sockaddr; 759 struct task_struct *np_thread; 760 struct timer_list np_login_timer; 761 struct iscsi_portal_group *np_login_tpg; 762 struct list_head np_list; 763} ____cacheline_aligned; 764 765struct iscsi_tpg_np { 766 struct iscsi_np *tpg_np; 767 struct iscsi_portal_group *tpg; 768 struct iscsi_tpg_np *tpg_np_parent; 769 struct list_head tpg_np_list; 770 struct list_head tpg_np_child_list; 771 struct list_head tpg_np_parent_list; 772 struct se_tpg_np se_tpg_np; 773 spinlock_t tpg_np_parent_lock; 774}; 775 776struct iscsi_portal_group { 777 unsigned char tpg_chap_id; 778 /* TPG State */ 779 enum tpg_state_table tpg_state; 780 /* Target Portal Group Tag */ 781 u16 tpgt; 782 /* Id assigned to target sessions */ 783 u16 ntsih; 784 /* Number of active sessions */ 785 u32 nsessions; 786 /* Number of Network Portals available for this TPG */ 787 u32 num_tpg_nps; 788 /* Per TPG LIO specific session ID. */ 789 u32 sid; 790 /* Spinlock for adding/removing Network Portals */ 791 spinlock_t tpg_np_lock; 792 spinlock_t tpg_state_lock; 793 struct se_portal_group tpg_se_tpg; 794 struct mutex tpg_access_lock; 795 struct mutex np_login_lock; 796 struct iscsi_tpg_attrib tpg_attrib; 797 /* Pointer to default list of iSCSI parameters for TPG */ 798 struct iscsi_param_list *param_list; 799 struct iscsi_tiqn *tpg_tiqn; 800 struct list_head tpg_gnp_list; 801 struct list_head tpg_list; 802} ____cacheline_aligned; 803 804#define ISCSI_TPG_C(c) ((struct iscsi_portal_group *)(c)->tpg) 805#define ISCSI_TPG_LUN(c, l) ((iscsi_tpg_list_t *)(c)->tpg->tpg_lun_list_t[l]) 806#define ISCSI_TPG_S(s) ((struct iscsi_portal_group *)(s)->tpg) 807#define ISCSI_TPG_ATTRIB(t) (&(t)->tpg_attrib) 808#define SE_TPG(tpg) (&(tpg)->tpg_se_tpg) 809 810struct iscsi_wwn_stat_grps { 811 struct config_group iscsi_stat_group; 812 struct config_group iscsi_instance_group; 813 struct config_group iscsi_sess_err_group; 814 struct config_group iscsi_tgt_attr_group; 815 struct config_group iscsi_login_stats_group; 816 struct config_group iscsi_logout_stats_group; 817}; 818 819struct iscsi_tiqn { 820#define ISCSI_IQN_LEN 224 821 unsigned char tiqn[ISCSI_IQN_LEN]; 822 enum tiqn_state_table tiqn_state; 823 int tiqn_access_count; 824 u32 tiqn_active_tpgs; 825 u32 tiqn_ntpgs; 826 u32 tiqn_num_tpg_nps; 827 u32 tiqn_nsessions; 828 struct list_head tiqn_list; 829 struct list_head tiqn_tpg_list; 830 spinlock_t tiqn_state_lock; 831 spinlock_t tiqn_tpg_lock; 832 struct se_wwn tiqn_wwn; 833 struct iscsi_wwn_stat_grps tiqn_stat_grps; 834 int tiqn_index; 835 struct iscsi_sess_err_stats sess_err_stats; 836 struct iscsi_login_stats login_stats; 837 struct iscsi_logout_stats logout_stats; 838} ____cacheline_aligned; 839 840#define WWN_STAT_GRPS(tiqn) (&(tiqn)->tiqn_stat_grps) 841 842struct iscsit_global { 843 /* In core shutdown */ 844 u32 in_shutdown; 845 u32 active_ts; 846 /* Unique identifier used for the authentication daemon */ 847 u32 auth_id; 848 u32 inactive_ts; 849 /* Thread Set bitmap count */ 850 int ts_bitmap_count; 851 /* Thread Set bitmap pointer */ 852 unsigned long *ts_bitmap; 853 /* Used for iSCSI discovery session authentication */ 854 struct iscsi_node_acl discovery_acl; 855 struct iscsi_portal_group *discovery_tpg; 856}; 857 858#endif /* ISCSI_TARGET_CORE_H */