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