1 #ifndef ISCSI_TARGET_CORE_H 2 #define ISCSI_TARGET_CORE_H 3 4 #include <linux/dma-direction.h> /* enum dma_data_direction */ 5 #include <linux/list.h> /* struct list_head */ 6 #include <linux/socket.h> /* struct sockaddr_storage */ 7 #include <linux/types.h> /* u8 */ 8 #include <scsi/iscsi_proto.h> /* itt_t */ 9 #include <target/target_core_base.h> /* struct se_cmd */ 10 11 struct sock; 12 13 #define ISCSIT_VERSION "v4.1.0" 14 #define ISCSI_MAX_DATASN_MISSING_COUNT 16 15 #define ISCSI_TX_THREAD_TCP_TIMEOUT 2 16 #define ISCSI_RX_THREAD_TCP_TIMEOUT 2 17 #define SECONDS_FOR_ASYNC_LOGOUT 10 18 #define SECONDS_FOR_ASYNC_TEXT 10 19 #define SECONDS_FOR_LOGOUT_COMP 15 20 #define WHITE_SPACE " \t\v\f\n\r" 21 #define ISCSIT_MIN_TAGS 16 22 #define ISCSIT_EXTRA_TAGS 8 23 #define ISCSIT_TCP_BACKLOG 256 24 #define ISCSI_RX_THREAD_NAME "iscsi_trx" 25 #define ISCSI_TX_THREAD_NAME "iscsi_ttx" 26 27 /* struct iscsi_node_attrib sanity values */ 28 #define NA_DATAOUT_TIMEOUT 3 29 #define NA_DATAOUT_TIMEOUT_MAX 60 30 #define NA_DATAOUT_TIMEOUT_MIX 2 31 #define NA_DATAOUT_TIMEOUT_RETRIES 5 32 #define NA_DATAOUT_TIMEOUT_RETRIES_MAX 15 33 #define NA_DATAOUT_TIMEOUT_RETRIES_MIN 1 34 #define NA_NOPIN_TIMEOUT 15 35 #define NA_NOPIN_TIMEOUT_MAX 60 36 #define NA_NOPIN_TIMEOUT_MIN 3 37 #define NA_NOPIN_RESPONSE_TIMEOUT 30 38 #define NA_NOPIN_RESPONSE_TIMEOUT_MAX 60 39 #define NA_NOPIN_RESPONSE_TIMEOUT_MIN 3 40 #define NA_RANDOM_DATAIN_PDU_OFFSETS 0 41 #define NA_RANDOM_DATAIN_SEQ_OFFSETS 0 42 #define NA_RANDOM_R2T_OFFSETS 0 43 44 /* struct iscsi_tpg_attrib sanity values */ 45 #define TA_AUTHENTICATION 1 46 #define TA_LOGIN_TIMEOUT 15 47 #define TA_LOGIN_TIMEOUT_MAX 30 48 #define TA_LOGIN_TIMEOUT_MIN 5 49 #define TA_NETIF_TIMEOUT 2 50 #define TA_NETIF_TIMEOUT_MAX 15 51 #define TA_NETIF_TIMEOUT_MIN 2 52 #define TA_GENERATE_NODE_ACLS 0 53 #define TA_DEFAULT_CMDSN_DEPTH 64 54 #define TA_DEFAULT_CMDSN_DEPTH_MAX 512 55 #define TA_DEFAULT_CMDSN_DEPTH_MIN 1 56 #define TA_CACHE_DYNAMIC_ACLS 0 57 /* Enabled by default in demo mode (generic_node_acls=1) */ 58 #define TA_DEMO_MODE_WRITE_PROTECT 1 59 /* Disabled by default in production mode w/ explict ACLs */ 60 #define TA_PROD_MODE_WRITE_PROTECT 0 61 #define TA_DEMO_MODE_DISCOVERY 1 62 #define TA_DEFAULT_ERL 0 63 #define TA_CACHE_CORE_NPS 0 64 /* T10 protection information disabled by default */ 65 #define TA_DEFAULT_T10_PI 0 66 #define TA_DEFAULT_FABRIC_PROT_TYPE 0 67 /* TPG status needs to be enabled to return sendtargets discovery endpoint info */ 68 #define TA_DEFAULT_TPG_ENABLED_SENDTARGETS 1 69 70 #define ISCSI_IOV_DATA_BUFFER 5 71 72 enum iscsit_transport_type { 73 ISCSI_TCP = 0, 74 ISCSI_SCTP_TCP = 1, 75 ISCSI_SCTP_UDP = 2, 76 ISCSI_IWARP_TCP = 3, 77 ISCSI_IWARP_SCTP = 4, 78 ISCSI_INFINIBAND = 5, 79 ISCSI_CXGBIT = 6, 80 }; 81 82 /* RFC-3720 7.1.4 Standard Connection State Diagram for a Target */ 83 enum target_conn_state_table { 84 TARG_CONN_STATE_FREE = 0x1, 85 TARG_CONN_STATE_XPT_UP = 0x3, 86 TARG_CONN_STATE_IN_LOGIN = 0x4, 87 TARG_CONN_STATE_LOGGED_IN = 0x5, 88 TARG_CONN_STATE_IN_LOGOUT = 0x6, 89 TARG_CONN_STATE_LOGOUT_REQUESTED = 0x7, 90 TARG_CONN_STATE_CLEANUP_WAIT = 0x8, 91 }; 92 93 /* RFC-3720 7.3.2 Session State Diagram for a Target */ 94 enum target_sess_state_table { 95 TARG_SESS_STATE_FREE = 0x1, 96 TARG_SESS_STATE_ACTIVE = 0x2, 97 TARG_SESS_STATE_LOGGED_IN = 0x3, 98 TARG_SESS_STATE_FAILED = 0x4, 99 TARG_SESS_STATE_IN_CONTINUE = 0x5, 100 }; 101 102 /* struct iscsi_data_count->type */ 103 enum data_count_type { 104 ISCSI_RX_DATA = 1, 105 ISCSI_TX_DATA = 2, 106 }; 107 108 /* struct iscsi_datain_req->dr_complete */ 109 enum datain_req_comp_table { 110 DATAIN_COMPLETE_NORMAL = 1, 111 DATAIN_COMPLETE_WITHIN_COMMAND_RECOVERY = 2, 112 DATAIN_COMPLETE_CONNECTION_RECOVERY = 3, 113 }; 114 115 /* struct iscsi_datain_req->recovery */ 116 enum datain_req_rec_table { 117 DATAIN_WITHIN_COMMAND_RECOVERY = 1, 118 DATAIN_CONNECTION_RECOVERY = 2, 119 }; 120 121 /* struct iscsi_portal_group->state */ 122 enum tpg_state_table { 123 TPG_STATE_FREE = 0, 124 TPG_STATE_ACTIVE = 1, 125 TPG_STATE_INACTIVE = 2, 126 TPG_STATE_COLD_RESET = 3, 127 }; 128 129 /* struct iscsi_tiqn->tiqn_state */ 130 enum tiqn_state_table { 131 TIQN_STATE_ACTIVE = 1, 132 TIQN_STATE_SHUTDOWN = 2, 133 }; 134 135 /* struct iscsi_cmd->cmd_flags */ 136 enum cmd_flags_table { 137 ICF_GOT_LAST_DATAOUT = 0x00000001, 138 ICF_GOT_DATACK_SNACK = 0x00000002, 139 ICF_NON_IMMEDIATE_UNSOLICITED_DATA = 0x00000004, 140 ICF_SENT_LAST_R2T = 0x00000008, 141 ICF_WITHIN_COMMAND_RECOVERY = 0x00000010, 142 ICF_CONTIG_MEMORY = 0x00000020, 143 ICF_ATTACHED_TO_RQUEUE = 0x00000040, 144 ICF_OOO_CMDSN = 0x00000080, 145 ICF_SENDTARGETS_ALL = 0x00000100, 146 ICF_SENDTARGETS_SINGLE = 0x00000200, 147 }; 148 149 /* struct iscsi_cmd->i_state */ 150 enum cmd_i_state_table { 151 ISTATE_NO_STATE = 0, 152 ISTATE_NEW_CMD = 1, 153 ISTATE_DEFERRED_CMD = 2, 154 ISTATE_UNSOLICITED_DATA = 3, 155 ISTATE_RECEIVE_DATAOUT = 4, 156 ISTATE_RECEIVE_DATAOUT_RECOVERY = 5, 157 ISTATE_RECEIVED_LAST_DATAOUT = 6, 158 ISTATE_WITHIN_DATAOUT_RECOVERY = 7, 159 ISTATE_IN_CONNECTION_RECOVERY = 8, 160 ISTATE_RECEIVED_TASKMGT = 9, 161 ISTATE_SEND_ASYNCMSG = 10, 162 ISTATE_SENT_ASYNCMSG = 11, 163 ISTATE_SEND_DATAIN = 12, 164 ISTATE_SEND_LAST_DATAIN = 13, 165 ISTATE_SENT_LAST_DATAIN = 14, 166 ISTATE_SEND_LOGOUTRSP = 15, 167 ISTATE_SENT_LOGOUTRSP = 16, 168 ISTATE_SEND_NOPIN = 17, 169 ISTATE_SENT_NOPIN = 18, 170 ISTATE_SEND_REJECT = 19, 171 ISTATE_SENT_REJECT = 20, 172 ISTATE_SEND_R2T = 21, 173 ISTATE_SENT_R2T = 22, 174 ISTATE_SEND_R2T_RECOVERY = 23, 175 ISTATE_SENT_R2T_RECOVERY = 24, 176 ISTATE_SEND_LAST_R2T = 25, 177 ISTATE_SENT_LAST_R2T = 26, 178 ISTATE_SEND_LAST_R2T_RECOVERY = 27, 179 ISTATE_SENT_LAST_R2T_RECOVERY = 28, 180 ISTATE_SEND_STATUS = 29, 181 ISTATE_SEND_STATUS_BROKEN_PC = 30, 182 ISTATE_SENT_STATUS = 31, 183 ISTATE_SEND_STATUS_RECOVERY = 32, 184 ISTATE_SENT_STATUS_RECOVERY = 33, 185 ISTATE_SEND_TASKMGTRSP = 34, 186 ISTATE_SENT_TASKMGTRSP = 35, 187 ISTATE_SEND_TEXTRSP = 36, 188 ISTATE_SENT_TEXTRSP = 37, 189 ISTATE_SEND_NOPIN_WANT_RESPONSE = 38, 190 ISTATE_SENT_NOPIN_WANT_RESPONSE = 39, 191 ISTATE_SEND_NOPIN_NO_RESPONSE = 40, 192 ISTATE_REMOVE = 41, 193 ISTATE_FREE = 42, 194 }; 195 196 /* Used for iscsi_recover_cmdsn() return values */ 197 enum recover_cmdsn_ret_table { 198 CMDSN_ERROR_CANNOT_RECOVER = -1, 199 CMDSN_NORMAL_OPERATION = 0, 200 CMDSN_LOWER_THAN_EXP = 1, 201 CMDSN_HIGHER_THAN_EXP = 2, 202 CMDSN_MAXCMDSN_OVERRUN = 3, 203 }; 204 205 /* Used for iscsi_handle_immediate_data() return values */ 206 enum immedate_data_ret_table { 207 IMMEDIATE_DATA_CANNOT_RECOVER = -1, 208 IMMEDIATE_DATA_NORMAL_OPERATION = 0, 209 IMMEDIATE_DATA_ERL1_CRC_FAILURE = 1, 210 }; 211 212 /* Used for iscsi_decide_dataout_action() return values */ 213 enum dataout_action_ret_table { 214 DATAOUT_CANNOT_RECOVER = -1, 215 DATAOUT_NORMAL = 0, 216 DATAOUT_SEND_R2T = 1, 217 DATAOUT_SEND_TO_TRANSPORT = 2, 218 DATAOUT_WITHIN_COMMAND_RECOVERY = 3, 219 }; 220 221 /* Used for struct iscsi_node_auth->naf_flags */ 222 enum naf_flags_table { 223 NAF_USERID_SET = 0x01, 224 NAF_PASSWORD_SET = 0x02, 225 NAF_USERID_IN_SET = 0x04, 226 NAF_PASSWORD_IN_SET = 0x08, 227 }; 228 229 /* Used by various struct timer_list to manage iSCSI specific state */ 230 enum iscsi_timer_flags_table { 231 ISCSI_TF_RUNNING = 0x01, 232 ISCSI_TF_STOP = 0x02, 233 ISCSI_TF_EXPIRED = 0x04, 234 }; 235 236 /* Used for struct iscsi_np->np_flags */ 237 enum np_flags_table { 238 NPF_IP_NETWORK = 0x00, 239 }; 240 241 /* Used for struct iscsi_np->np_thread_state */ 242 enum np_thread_state_table { 243 ISCSI_NP_THREAD_ACTIVE = 1, 244 ISCSI_NP_THREAD_INACTIVE = 2, 245 ISCSI_NP_THREAD_RESET = 3, 246 ISCSI_NP_THREAD_SHUTDOWN = 4, 247 ISCSI_NP_THREAD_EXIT = 5, 248 }; 249 250 struct iscsi_conn_ops { 251 u8 HeaderDigest; /* [0,1] == [None,CRC32C] */ 252 u8 DataDigest; /* [0,1] == [None,CRC32C] */ 253 u32 MaxRecvDataSegmentLength; /* [512..2**24-1] */ 254 u32 MaxXmitDataSegmentLength; /* [512..2**24-1] */ 255 /* 256 * iSER specific connection parameters 257 */ 258 u32 InitiatorRecvDataSegmentLength; /* [512..2**24-1] */ 259 u32 TargetRecvDataSegmentLength; /* [512..2**24-1] */ 260 }; 261 262 struct 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 }; 286 287 struct iscsi_queue_req { 288 int state; 289 struct iscsi_cmd *cmd; 290 struct list_head qr_list; 291 }; 292 293 struct 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 }; 302 303 struct iscsi_param_list { 304 bool iser; 305 struct list_head param_list; 306 struct list_head extra_response_list; 307 }; 308 309 struct 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; 323 324 struct 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; 332 333 struct iscsi_datain { 334 u8 flags; 335 u32 data_sn; 336 u32 length; 337 u32 offset; 338 } ____cacheline_aligned; 339 340 struct 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; 350 351 struct 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; 500 501 struct 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 }; 508 509 struct 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 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 struct sockaddr_storage login_sockaddr; 535 struct sockaddr_storage local_sockaddr; 536 int conn_usage_count; 537 int conn_waiting_on_uc; 538 atomic_t check_immediate_queue; 539 atomic_t conn_logout_remove; 540 atomic_t connection_exit; 541 atomic_t connection_recovery; 542 atomic_t connection_reinstatement; 543 atomic_t connection_wait_rcfr; 544 atomic_t sleep_on_conn_wait_comp; 545 atomic_t transport_failed; 546 struct completion conn_post_wait_comp; 547 struct completion conn_wait_comp; 548 struct completion conn_wait_rcfr_comp; 549 struct completion conn_waiting_on_uc_comp; 550 struct completion conn_logout_comp; 551 struct completion tx_half_close_comp; 552 struct completion rx_half_close_comp; 553 /* socket used by this connection */ 554 struct socket *sock; 555 void (*orig_data_ready)(struct sock *); 556 void (*orig_state_change)(struct sock *); 557 #define LOGIN_FLAGS_READ_ACTIVE 1 558 #define LOGIN_FLAGS_CLOSED 2 559 #define LOGIN_FLAGS_READY 4 560 #define LOGIN_FLAGS_INITIAL_PDU 8 561 unsigned long login_flags; 562 struct delayed_work login_work; 563 struct delayed_work login_cleanup_work; 564 struct iscsi_login *login; 565 struct timer_list nopin_timer; 566 struct timer_list nopin_response_timer; 567 struct timer_list transport_timer; 568 struct task_struct *login_kworker; 569 /* Spinlock used for add/deleting cmd's from conn_cmd_list */ 570 spinlock_t cmd_lock; 571 spinlock_t conn_usage_lock; 572 spinlock_t immed_queue_lock; 573 spinlock_t nopin_timer_lock; 574 spinlock_t response_queue_lock; 575 spinlock_t state_lock; 576 /* libcrypto RX and TX contexts for crc32c */ 577 struct ahash_request *conn_rx_hash; 578 struct ahash_request *conn_tx_hash; 579 /* Used for scheduling TX and RX connection kthreads */ 580 cpumask_var_t conn_cpumask; 581 unsigned int conn_rx_reset_cpumask:1; 582 unsigned int conn_tx_reset_cpumask:1; 583 /* list_head of struct iscsi_cmd for this connection */ 584 struct list_head conn_cmd_list; 585 struct list_head immed_queue_list; 586 struct list_head response_queue_list; 587 struct iscsi_conn_ops *conn_ops; 588 struct iscsi_login *conn_login; 589 struct iscsit_transport *conn_transport; 590 struct iscsi_param_list *param_list; 591 /* Used for per connection auth state machine */ 592 void *auth_protocol; 593 void *context; 594 struct iscsi_login_thread_s *login_thread; 595 struct iscsi_portal_group *tpg; 596 struct iscsi_tpg_np *tpg_np; 597 /* Pointer to parent session */ 598 struct iscsi_session *sess; 599 int bitmap_id; 600 int rx_thread_active; 601 struct task_struct *rx_thread; 602 struct completion rx_login_comp; 603 int tx_thread_active; 604 struct task_struct *tx_thread; 605 /* list_head for session connection list */ 606 struct list_head conn_list; 607 } ____cacheline_aligned; 608 609 struct 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; 621 622 struct 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 atomic_t 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; 687 688 struct 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; 713 714 struct 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 }; 727 728 struct se_dev_entry_s; 729 730 struct 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" 745 746 struct iscsi_node_stat_grps { 747 struct config_group iscsi_sess_stats_group; 748 struct config_group iscsi_conn_stats_group; 749 }; 750 751 struct iscsi_node_acl { 752 struct se_node_acl se_node_acl; 753 struct iscsi_node_attrib node_attrib; 754 struct iscsi_node_auth node_auth; 755 struct iscsi_node_stat_grps node_stat_grps; 756 }; 757 758 struct 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 u32 fabric_prot_type; 771 u32 tpg_enabled_sendtargets; 772 struct iscsi_portal_group *tpg; 773 }; 774 775 struct iscsi_np { 776 int np_network_transport; 777 int np_ip_proto; 778 int np_sock_type; 779 enum np_thread_state_table np_thread_state; 780 bool enabled; 781 enum iscsi_timer_flags_table np_login_timer_flags; 782 u32 np_exports; 783 enum np_flags_table np_flags; 784 spinlock_t np_thread_lock; 785 struct completion np_restart_comp; 786 struct socket *np_socket; 787 struct 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 } ____cacheline_aligned; 794 795 struct iscsi_tpg_np { 796 struct iscsi_np *tpg_np; 797 struct iscsi_portal_group *tpg; 798 struct iscsi_tpg_np *tpg_np_parent; 799 struct list_head tpg_np_list; 800 struct list_head tpg_np_child_list; 801 struct list_head tpg_np_parent_list; 802 struct se_tpg_np se_tpg_np; 803 spinlock_t tpg_np_parent_lock; 804 struct completion tpg_np_comp; 805 struct kref tpg_np_kref; 806 }; 807 808 struct iscsi_portal_group { 809 unsigned char tpg_chap_id; 810 /* TPG State */ 811 enum tpg_state_table tpg_state; 812 /* Target Portal Group Tag */ 813 u16 tpgt; 814 /* Id assigned to target sessions */ 815 u16 ntsih; 816 /* Number of active sessions */ 817 u32 nsessions; 818 /* Number of Network Portals available for this TPG */ 819 u32 num_tpg_nps; 820 /* Per TPG LIO specific session ID. */ 821 u32 sid; 822 /* Spinlock for adding/removing Network Portals */ 823 spinlock_t tpg_np_lock; 824 spinlock_t tpg_state_lock; 825 struct se_portal_group tpg_se_tpg; 826 struct mutex tpg_access_lock; 827 struct semaphore np_login_sem; 828 struct iscsi_tpg_attrib tpg_attrib; 829 struct iscsi_node_auth tpg_demo_auth; 830 /* Pointer to default list of iSCSI parameters for TPG */ 831 struct iscsi_param_list *param_list; 832 struct iscsi_tiqn *tpg_tiqn; 833 struct list_head tpg_gnp_list; 834 struct list_head tpg_list; 835 } ____cacheline_aligned; 836 837 struct iscsi_wwn_stat_grps { 838 struct config_group iscsi_stat_group; 839 struct config_group iscsi_instance_group; 840 struct config_group iscsi_sess_err_group; 841 struct config_group iscsi_tgt_attr_group; 842 struct config_group iscsi_login_stats_group; 843 struct config_group iscsi_logout_stats_group; 844 }; 845 846 struct iscsi_tiqn { 847 #define ISCSI_IQN_LEN 224 848 unsigned char tiqn[ISCSI_IQN_LEN]; 849 enum tiqn_state_table tiqn_state; 850 int tiqn_access_count; 851 u32 tiqn_active_tpgs; 852 u32 tiqn_ntpgs; 853 u32 tiqn_num_tpg_nps; 854 u32 tiqn_nsessions; 855 struct list_head tiqn_list; 856 struct list_head tiqn_tpg_list; 857 spinlock_t tiqn_state_lock; 858 spinlock_t tiqn_tpg_lock; 859 struct se_wwn tiqn_wwn; 860 struct iscsi_wwn_stat_grps tiqn_stat_grps; 861 int tiqn_index; 862 struct iscsi_sess_err_stats sess_err_stats; 863 struct iscsi_login_stats login_stats; 864 struct iscsi_logout_stats logout_stats; 865 } ____cacheline_aligned; 866 867 struct iscsit_global { 868 /* In core shutdown */ 869 u32 in_shutdown; 870 u32 active_ts; 871 /* Unique identifier used for the authentication daemon */ 872 u32 auth_id; 873 u32 inactive_ts; 874 #define ISCSIT_BITMAP_BITS 262144 875 /* Thread Set bitmap pointer */ 876 unsigned long *ts_bitmap; 877 spinlock_t ts_bitmap_lock; 878 /* Used for iSCSI discovery session authentication */ 879 struct iscsi_node_acl discovery_acl; 880 struct iscsi_portal_group *discovery_tpg; 881 }; 882 883 static inline u32 session_get_next_ttt(struct iscsi_session *session) 884 { 885 u32 ttt; 886 887 spin_lock_bh(&session->ttt_lock); 888 ttt = session->targ_xfer_tag++; 889 if (ttt == 0xFFFFFFFF) 890 ttt = session->targ_xfer_tag++; 891 spin_unlock_bh(&session->ttt_lock); 892 893 return ttt; 894 } 895 896 extern struct iscsi_cmd *iscsit_find_cmd_from_itt(struct iscsi_conn *, itt_t); 897 898 static inline void iscsit_thread_check_cpumask( 899 struct iscsi_conn *conn, 900 struct task_struct *p, 901 int mode) 902 { 903 /* 904 * mode == 1 signals iscsi_target_tx_thread() usage. 905 * mode == 0 signals iscsi_target_rx_thread() usage. 906 */ 907 if (mode == 1) { 908 if (!conn->conn_tx_reset_cpumask) 909 return; 910 conn->conn_tx_reset_cpumask = 0; 911 } else { 912 if (!conn->conn_rx_reset_cpumask) 913 return; 914 conn->conn_rx_reset_cpumask = 0; 915 } 916 /* 917 * Update the CPU mask for this single kthread so that 918 * both TX and RX kthreads are scheduled to run on the 919 * same CPU. 920 */ 921 set_cpus_allowed_ptr(p, conn->conn_cpumask); 922 } 923 #endif /* ISCSI_TARGET_CORE_H */ 924