1 #ifndef ISCSI_TARGET_CORE_H 2 #define ISCSI_TARGET_CORE_H 3 4 #include <linux/in.h> 5 #include <linux/configfs.h> 6 #include <net/sock.h> 7 #include <net/tcp.h> 8 #include <scsi/iscsi_proto.h> 9 #include <target/target_core_base.h> 10 11 #define ISCSIT_VERSION "v4.1.0" 12 #define ISCSI_MAX_DATASN_MISSING_COUNT 16 13 #define ISCSI_TX_THREAD_TCP_TIMEOUT 2 14 #define ISCSI_RX_THREAD_TCP_TIMEOUT 2 15 #define SECONDS_FOR_ASYNC_LOGOUT 10 16 #define SECONDS_FOR_ASYNC_TEXT 10 17 #define SECONDS_FOR_LOGOUT_COMP 15 18 #define WHITE_SPACE " \t\v\f\n\r" 19 #define ISCSIT_MIN_TAGS 16 20 #define ISCSIT_EXTRA_TAGS 8 21 #define ISCSIT_TCP_BACKLOG 256 22 #define ISCSI_RX_THREAD_NAME "iscsi_trx" 23 #define ISCSI_TX_THREAD_NAME "iscsi_ttx" 24 25 /* struct iscsi_node_attrib sanity values */ 26 #define NA_DATAOUT_TIMEOUT 3 27 #define NA_DATAOUT_TIMEOUT_MAX 60 28 #define NA_DATAOUT_TIMEOUT_MIX 2 29 #define NA_DATAOUT_TIMEOUT_RETRIES 5 30 #define NA_DATAOUT_TIMEOUT_RETRIES_MAX 15 31 #define NA_DATAOUT_TIMEOUT_RETRIES_MIN 1 32 #define NA_NOPIN_TIMEOUT 15 33 #define NA_NOPIN_TIMEOUT_MAX 60 34 #define NA_NOPIN_TIMEOUT_MIN 3 35 #define NA_NOPIN_RESPONSE_TIMEOUT 30 36 #define NA_NOPIN_RESPONSE_TIMEOUT_MAX 60 37 #define NA_NOPIN_RESPONSE_TIMEOUT_MIN 3 38 #define NA_RANDOM_DATAIN_PDU_OFFSETS 0 39 #define NA_RANDOM_DATAIN_SEQ_OFFSETS 0 40 #define NA_RANDOM_R2T_OFFSETS 0 41 42 /* struct iscsi_tpg_attrib sanity values */ 43 #define TA_AUTHENTICATION 1 44 #define TA_LOGIN_TIMEOUT 15 45 #define TA_LOGIN_TIMEOUT_MAX 30 46 #define TA_LOGIN_TIMEOUT_MIN 5 47 #define TA_NETIF_TIMEOUT 2 48 #define TA_NETIF_TIMEOUT_MAX 15 49 #define TA_NETIF_TIMEOUT_MIN 2 50 #define TA_GENERATE_NODE_ACLS 0 51 #define TA_DEFAULT_CMDSN_DEPTH 64 52 #define TA_DEFAULT_CMDSN_DEPTH_MAX 512 53 #define TA_DEFAULT_CMDSN_DEPTH_MIN 1 54 #define TA_CACHE_DYNAMIC_ACLS 0 55 /* Enabled by default in demo mode (generic_node_acls=1) */ 56 #define TA_DEMO_MODE_WRITE_PROTECT 1 57 /* Disabled by default in production mode w/ explict ACLs */ 58 #define TA_PROD_MODE_WRITE_PROTECT 0 59 #define TA_DEMO_MODE_DISCOVERY 1 60 #define TA_DEFAULT_ERL 0 61 #define TA_CACHE_CORE_NPS 0 62 /* T10 protection information disabled by default */ 63 #define TA_DEFAULT_T10_PI 0 64 #define TA_DEFAULT_FABRIC_PROT_TYPE 0 65 /* TPG status needs to be enabled to return sendtargets discovery endpoint info */ 66 #define TA_DEFAULT_TPG_ENABLED_SENDTARGETS 1 67 68 #define ISCSI_IOV_DATA_BUFFER 5 69 70 enum iscsit_transport_type { 71 ISCSI_TCP = 0, 72 ISCSI_SCTP_TCP = 1, 73 ISCSI_SCTP_UDP = 2, 74 ISCSI_IWARP_TCP = 3, 75 ISCSI_IWARP_SCTP = 4, 76 ISCSI_INFINIBAND = 5, 77 }; 78 79 /* RFC-3720 7.1.4 Standard Connection State Diagram for a Target */ 80 enum target_conn_state_table { 81 TARG_CONN_STATE_FREE = 0x1, 82 TARG_CONN_STATE_XPT_UP = 0x3, 83 TARG_CONN_STATE_IN_LOGIN = 0x4, 84 TARG_CONN_STATE_LOGGED_IN = 0x5, 85 TARG_CONN_STATE_IN_LOGOUT = 0x6, 86 TARG_CONN_STATE_LOGOUT_REQUESTED = 0x7, 87 TARG_CONN_STATE_CLEANUP_WAIT = 0x8, 88 }; 89 90 /* RFC-3720 7.3.2 Session State Diagram for a Target */ 91 enum target_sess_state_table { 92 TARG_SESS_STATE_FREE = 0x1, 93 TARG_SESS_STATE_ACTIVE = 0x2, 94 TARG_SESS_STATE_LOGGED_IN = 0x3, 95 TARG_SESS_STATE_FAILED = 0x4, 96 TARG_SESS_STATE_IN_CONTINUE = 0x5, 97 }; 98 99 /* struct iscsi_data_count->type */ 100 enum data_count_type { 101 ISCSI_RX_DATA = 1, 102 ISCSI_TX_DATA = 2, 103 }; 104 105 /* struct iscsi_datain_req->dr_complete */ 106 enum datain_req_comp_table { 107 DATAIN_COMPLETE_NORMAL = 1, 108 DATAIN_COMPLETE_WITHIN_COMMAND_RECOVERY = 2, 109 DATAIN_COMPLETE_CONNECTION_RECOVERY = 3, 110 }; 111 112 /* struct iscsi_datain_req->recovery */ 113 enum datain_req_rec_table { 114 DATAIN_WITHIN_COMMAND_RECOVERY = 1, 115 DATAIN_CONNECTION_RECOVERY = 2, 116 }; 117 118 /* struct iscsi_portal_group->state */ 119 enum tpg_state_table { 120 TPG_STATE_FREE = 0, 121 TPG_STATE_ACTIVE = 1, 122 TPG_STATE_INACTIVE = 2, 123 TPG_STATE_COLD_RESET = 3, 124 }; 125 126 /* struct iscsi_tiqn->tiqn_state */ 127 enum tiqn_state_table { 128 TIQN_STATE_ACTIVE = 1, 129 TIQN_STATE_SHUTDOWN = 2, 130 }; 131 132 /* struct iscsi_cmd->cmd_flags */ 133 enum cmd_flags_table { 134 ICF_GOT_LAST_DATAOUT = 0x00000001, 135 ICF_GOT_DATACK_SNACK = 0x00000002, 136 ICF_NON_IMMEDIATE_UNSOLICITED_DATA = 0x00000004, 137 ICF_SENT_LAST_R2T = 0x00000008, 138 ICF_WITHIN_COMMAND_RECOVERY = 0x00000010, 139 ICF_CONTIG_MEMORY = 0x00000020, 140 ICF_ATTACHED_TO_RQUEUE = 0x00000040, 141 ICF_OOO_CMDSN = 0x00000080, 142 ICF_SENDTARGETS_ALL = 0x00000100, 143 ICF_SENDTARGETS_SINGLE = 0x00000200, 144 }; 145 146 /* struct iscsi_cmd->i_state */ 147 enum cmd_i_state_table { 148 ISTATE_NO_STATE = 0, 149 ISTATE_NEW_CMD = 1, 150 ISTATE_DEFERRED_CMD = 2, 151 ISTATE_UNSOLICITED_DATA = 3, 152 ISTATE_RECEIVE_DATAOUT = 4, 153 ISTATE_RECEIVE_DATAOUT_RECOVERY = 5, 154 ISTATE_RECEIVED_LAST_DATAOUT = 6, 155 ISTATE_WITHIN_DATAOUT_RECOVERY = 7, 156 ISTATE_IN_CONNECTION_RECOVERY = 8, 157 ISTATE_RECEIVED_TASKMGT = 9, 158 ISTATE_SEND_ASYNCMSG = 10, 159 ISTATE_SENT_ASYNCMSG = 11, 160 ISTATE_SEND_DATAIN = 12, 161 ISTATE_SEND_LAST_DATAIN = 13, 162 ISTATE_SENT_LAST_DATAIN = 14, 163 ISTATE_SEND_LOGOUTRSP = 15, 164 ISTATE_SENT_LOGOUTRSP = 16, 165 ISTATE_SEND_NOPIN = 17, 166 ISTATE_SENT_NOPIN = 18, 167 ISTATE_SEND_REJECT = 19, 168 ISTATE_SENT_REJECT = 20, 169 ISTATE_SEND_R2T = 21, 170 ISTATE_SENT_R2T = 22, 171 ISTATE_SEND_R2T_RECOVERY = 23, 172 ISTATE_SENT_R2T_RECOVERY = 24, 173 ISTATE_SEND_LAST_R2T = 25, 174 ISTATE_SENT_LAST_R2T = 26, 175 ISTATE_SEND_LAST_R2T_RECOVERY = 27, 176 ISTATE_SENT_LAST_R2T_RECOVERY = 28, 177 ISTATE_SEND_STATUS = 29, 178 ISTATE_SEND_STATUS_BROKEN_PC = 30, 179 ISTATE_SENT_STATUS = 31, 180 ISTATE_SEND_STATUS_RECOVERY = 32, 181 ISTATE_SENT_STATUS_RECOVERY = 33, 182 ISTATE_SEND_TASKMGTRSP = 34, 183 ISTATE_SENT_TASKMGTRSP = 35, 184 ISTATE_SEND_TEXTRSP = 36, 185 ISTATE_SENT_TEXTRSP = 37, 186 ISTATE_SEND_NOPIN_WANT_RESPONSE = 38, 187 ISTATE_SENT_NOPIN_WANT_RESPONSE = 39, 188 ISTATE_SEND_NOPIN_NO_RESPONSE = 40, 189 ISTATE_REMOVE = 41, 190 ISTATE_FREE = 42, 191 }; 192 193 /* Used for iscsi_recover_cmdsn() return values */ 194 enum recover_cmdsn_ret_table { 195 CMDSN_ERROR_CANNOT_RECOVER = -1, 196 CMDSN_NORMAL_OPERATION = 0, 197 CMDSN_LOWER_THAN_EXP = 1, 198 CMDSN_HIGHER_THAN_EXP = 2, 199 CMDSN_MAXCMDSN_OVERRUN = 3, 200 }; 201 202 /* Used for iscsi_handle_immediate_data() return values */ 203 enum immedate_data_ret_table { 204 IMMEDIATE_DATA_CANNOT_RECOVER = -1, 205 IMMEDIATE_DATA_NORMAL_OPERATION = 0, 206 IMMEDIATE_DATA_ERL1_CRC_FAILURE = 1, 207 }; 208 209 /* Used for iscsi_decide_dataout_action() return values */ 210 enum dataout_action_ret_table { 211 DATAOUT_CANNOT_RECOVER = -1, 212 DATAOUT_NORMAL = 0, 213 DATAOUT_SEND_R2T = 1, 214 DATAOUT_SEND_TO_TRANSPORT = 2, 215 DATAOUT_WITHIN_COMMAND_RECOVERY = 3, 216 }; 217 218 /* Used for struct iscsi_node_auth->naf_flags */ 219 enum naf_flags_table { 220 NAF_USERID_SET = 0x01, 221 NAF_PASSWORD_SET = 0x02, 222 NAF_USERID_IN_SET = 0x04, 223 NAF_PASSWORD_IN_SET = 0x08, 224 }; 225 226 /* Used by various struct timer_list to manage iSCSI specific state */ 227 enum iscsi_timer_flags_table { 228 ISCSI_TF_RUNNING = 0x01, 229 ISCSI_TF_STOP = 0x02, 230 ISCSI_TF_EXPIRED = 0x04, 231 }; 232 233 /* Used for struct iscsi_np->np_flags */ 234 enum np_flags_table { 235 NPF_IP_NETWORK = 0x00, 236 }; 237 238 /* Used for struct iscsi_np->np_thread_state */ 239 enum np_thread_state_table { 240 ISCSI_NP_THREAD_ACTIVE = 1, 241 ISCSI_NP_THREAD_INACTIVE = 2, 242 ISCSI_NP_THREAD_RESET = 3, 243 ISCSI_NP_THREAD_SHUTDOWN = 4, 244 ISCSI_NP_THREAD_EXIT = 5, 245 }; 246 247 struct iscsi_conn_ops { 248 u8 HeaderDigest; /* [0,1] == [None,CRC32C] */ 249 u8 DataDigest; /* [0,1] == [None,CRC32C] */ 250 u32 MaxRecvDataSegmentLength; /* [512..2**24-1] */ 251 u32 MaxXmitDataSegmentLength; /* [512..2**24-1] */ 252 /* 253 * iSER specific connection parameters 254 */ 255 u32 InitiatorRecvDataSegmentLength; /* [512..2**24-1] */ 256 u32 TargetRecvDataSegmentLength; /* [512..2**24-1] */ 257 }; 258 259 struct 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 }; 283 284 struct iscsi_queue_req { 285 int state; 286 struct iscsi_cmd *cmd; 287 struct list_head qr_list; 288 }; 289 290 struct 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 }; 299 300 struct iscsi_param_list { 301 bool iser; 302 struct list_head param_list; 303 struct list_head extra_response_list; 304 }; 305 306 struct 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; 320 321 struct 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; 329 330 struct iscsi_datain { 331 u8 flags; 332 u32 data_sn; 333 u32 length; 334 u32 offset; 335 } ____cacheline_aligned; 336 337 struct 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; 347 348 struct 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; 497 498 struct 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 }; 505 506 struct 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 int net_size; 523 int login_family; 524 u32 auth_id; 525 u32 conn_flags; 526 /* Used for iscsi_tx_login_rsp() */ 527 itt_t login_itt; 528 u32 exp_statsn; 529 /* Per connection status sequence number */ 530 u32 stat_sn; 531 struct sockaddr_storage login_sockaddr; 532 struct sockaddr_storage local_sockaddr; 533 int conn_usage_count; 534 int conn_waiting_on_uc; 535 atomic_t check_immediate_queue; 536 atomic_t conn_logout_remove; 537 atomic_t connection_exit; 538 atomic_t connection_recovery; 539 atomic_t connection_reinstatement; 540 atomic_t connection_wait_rcfr; 541 atomic_t sleep_on_conn_wait_comp; 542 atomic_t transport_failed; 543 struct completion conn_post_wait_comp; 544 struct completion conn_wait_comp; 545 struct completion conn_wait_rcfr_comp; 546 struct completion conn_waiting_on_uc_comp; 547 struct completion conn_logout_comp; 548 struct completion tx_half_close_comp; 549 struct completion rx_half_close_comp; 550 /* socket used by this connection */ 551 struct socket *sock; 552 void (*orig_data_ready)(struct sock *); 553 void (*orig_state_change)(struct sock *); 554 #define LOGIN_FLAGS_READ_ACTIVE 1 555 #define LOGIN_FLAGS_CLOSED 2 556 #define LOGIN_FLAGS_READY 4 557 unsigned long login_flags; 558 struct delayed_work login_work; 559 struct delayed_work login_cleanup_work; 560 struct iscsi_login *login; 561 struct timer_list nopin_timer; 562 struct timer_list nopin_response_timer; 563 struct timer_list transport_timer; 564 struct task_struct *login_kworker; 565 /* Spinlock used for add/deleting cmd's from conn_cmd_list */ 566 spinlock_t cmd_lock; 567 spinlock_t conn_usage_lock; 568 spinlock_t immed_queue_lock; 569 spinlock_t nopin_timer_lock; 570 spinlock_t response_queue_lock; 571 spinlock_t state_lock; 572 /* libcrypto RX and TX contexts for crc32c */ 573 struct ahash_request *conn_rx_hash; 574 struct ahash_request *conn_tx_hash; 575 /* Used for scheduling TX and RX connection kthreads */ 576 cpumask_var_t conn_cpumask; 577 unsigned int conn_rx_reset_cpumask:1; 578 unsigned int conn_tx_reset_cpumask:1; 579 /* list_head of struct iscsi_cmd for this connection */ 580 struct list_head conn_cmd_list; 581 struct list_head immed_queue_list; 582 struct list_head response_queue_list; 583 struct iscsi_conn_ops *conn_ops; 584 struct iscsi_login *conn_login; 585 struct iscsit_transport *conn_transport; 586 struct iscsi_param_list *param_list; 587 /* Used for per connection auth state machine */ 588 void *auth_protocol; 589 void *context; 590 struct iscsi_login_thread_s *login_thread; 591 struct iscsi_portal_group *tpg; 592 struct iscsi_tpg_np *tpg_np; 593 /* Pointer to parent session */ 594 struct iscsi_session *sess; 595 int bitmap_id; 596 int rx_thread_active; 597 struct task_struct *rx_thread; 598 struct completion rx_login_comp; 599 int tx_thread_active; 600 struct task_struct *tx_thread; 601 /* list_head for session connection list */ 602 struct list_head conn_list; 603 } ____cacheline_aligned; 604 605 struct iscsi_conn_recovery { 606 u16 cid; 607 u32 cmd_count; 608 u32 maxrecvdatasegmentlength; 609 u32 maxxmitdatasegmentlength; 610 int ready_for_reallegiance; 611 struct list_head conn_recovery_cmd_list; 612 spinlock_t conn_recovery_cmd_lock; 613 struct timer_list time2retain_timer; 614 struct iscsi_session *sess; 615 struct list_head cr_list; 616 } ____cacheline_aligned; 617 618 struct iscsi_session { 619 u8 initiator_vendor; 620 u8 isid[6]; 621 enum iscsi_timer_flags_table time2retain_timer_flags; 622 u8 version_active; 623 u16 cid_called; 624 u16 conn_recovery_count; 625 u16 tsih; 626 /* state session is currently in */ 627 u32 session_state; 628 /* session wide counter: initiator assigned task tag */ 629 itt_t init_task_tag; 630 /* session wide counter: target assigned task tag */ 631 u32 targ_xfer_tag; 632 u32 cmdsn_window; 633 634 /* protects cmdsn values */ 635 struct mutex cmdsn_mutex; 636 /* session wide counter: expected command sequence number */ 637 u32 exp_cmd_sn; 638 /* session wide counter: maximum allowed command sequence number */ 639 atomic_t max_cmd_sn; 640 struct list_head sess_ooo_cmdsn_list; 641 642 /* LIO specific session ID */ 643 u32 sid; 644 char auth_type[8]; 645 /* unique within the target */ 646 int session_index; 647 /* Used for session reference counting */ 648 int session_usage_count; 649 int session_waiting_on_uc; 650 atomic_long_t cmd_pdus; 651 atomic_long_t rsp_pdus; 652 atomic_long_t tx_data_octets; 653 atomic_long_t rx_data_octets; 654 atomic_long_t conn_digest_errors; 655 atomic_long_t conn_timeout_errors; 656 u64 creation_time; 657 /* Number of active connections */ 658 atomic_t nconn; 659 atomic_t session_continuation; 660 atomic_t session_fall_back_to_erl0; 661 atomic_t session_logout; 662 atomic_t session_reinstatement; 663 atomic_t session_stop_active; 664 atomic_t sleep_on_sess_wait_comp; 665 /* connection list */ 666 struct list_head sess_conn_list; 667 struct list_head cr_active_list; 668 struct list_head cr_inactive_list; 669 spinlock_t conn_lock; 670 spinlock_t cr_a_lock; 671 spinlock_t cr_i_lock; 672 spinlock_t session_usage_lock; 673 spinlock_t ttt_lock; 674 struct completion async_msg_comp; 675 struct completion reinstatement_comp; 676 struct completion session_wait_comp; 677 struct completion session_waiting_on_uc_comp; 678 struct timer_list time2retain_timer; 679 struct iscsi_sess_ops *sess_ops; 680 struct se_session *se_sess; 681 struct iscsi_portal_group *tpg; 682 } ____cacheline_aligned; 683 684 struct iscsi_login { 685 u8 auth_complete; 686 u8 checked_for_existing; 687 u8 current_stage; 688 u8 leading_connection; 689 u8 first_request; 690 u8 version_min; 691 u8 version_max; 692 u8 login_complete; 693 u8 login_failed; 694 bool zero_tsih; 695 char isid[6]; 696 u32 cmd_sn; 697 itt_t init_task_tag; 698 u32 initial_exp_statsn; 699 u32 rsp_length; 700 u16 cid; 701 u16 tsih; 702 char req[ISCSI_HDR_LEN]; 703 char rsp[ISCSI_HDR_LEN]; 704 char *req_buf; 705 char *rsp_buf; 706 struct iscsi_conn *conn; 707 struct iscsi_np *np; 708 } ____cacheline_aligned; 709 710 struct iscsi_node_attrib { 711 u32 dataout_timeout; 712 u32 dataout_timeout_retries; 713 u32 default_erl; 714 u32 nopin_timeout; 715 u32 nopin_response_timeout; 716 u32 random_datain_pdu_offsets; 717 u32 random_datain_seq_offsets; 718 u32 random_r2t_offsets; 719 u32 tmr_cold_reset; 720 u32 tmr_warm_reset; 721 struct iscsi_node_acl *nacl; 722 }; 723 724 struct se_dev_entry_s; 725 726 struct iscsi_node_auth { 727 enum naf_flags_table naf_flags; 728 int authenticate_target; 729 /* Used for iscsit_global->discovery_auth, 730 * set to zero (auth disabled) by default */ 731 int enforce_discovery_auth; 732 #define MAX_USER_LEN 256 733 #define MAX_PASS_LEN 256 734 char userid[MAX_USER_LEN]; 735 char password[MAX_PASS_LEN]; 736 char userid_mutual[MAX_USER_LEN]; 737 char password_mutual[MAX_PASS_LEN]; 738 }; 739 740 #include "iscsi_target_stat.h" 741 742 struct iscsi_node_stat_grps { 743 struct config_group iscsi_sess_stats_group; 744 struct config_group iscsi_conn_stats_group; 745 }; 746 747 struct iscsi_node_acl { 748 struct se_node_acl se_node_acl; 749 struct iscsi_node_attrib node_attrib; 750 struct iscsi_node_auth node_auth; 751 struct iscsi_node_stat_grps node_stat_grps; 752 }; 753 754 struct iscsi_tpg_attrib { 755 u32 authentication; 756 u32 login_timeout; 757 u32 netif_timeout; 758 u32 generate_node_acls; 759 u32 cache_dynamic_acls; 760 u32 default_cmdsn_depth; 761 u32 demo_mode_write_protect; 762 u32 prod_mode_write_protect; 763 u32 demo_mode_discovery; 764 u32 default_erl; 765 u8 t10_pi; 766 u32 fabric_prot_type; 767 u32 tpg_enabled_sendtargets; 768 struct iscsi_portal_group *tpg; 769 }; 770 771 struct iscsi_np { 772 int np_network_transport; 773 int np_ip_proto; 774 int np_sock_type; 775 enum np_thread_state_table np_thread_state; 776 bool enabled; 777 enum iscsi_timer_flags_table np_login_timer_flags; 778 u32 np_exports; 779 enum np_flags_table np_flags; 780 spinlock_t np_thread_lock; 781 struct completion np_restart_comp; 782 struct socket *np_socket; 783 struct sockaddr_storage np_sockaddr; 784 struct task_struct *np_thread; 785 struct timer_list np_login_timer; 786 void *np_context; 787 struct iscsit_transport *np_transport; 788 struct list_head np_list; 789 } ____cacheline_aligned; 790 791 struct iscsi_tpg_np { 792 struct iscsi_np *tpg_np; 793 struct iscsi_portal_group *tpg; 794 struct iscsi_tpg_np *tpg_np_parent; 795 struct list_head tpg_np_list; 796 struct list_head tpg_np_child_list; 797 struct list_head tpg_np_parent_list; 798 struct se_tpg_np se_tpg_np; 799 spinlock_t tpg_np_parent_lock; 800 struct completion tpg_np_comp; 801 struct kref tpg_np_kref; 802 }; 803 804 struct iscsi_portal_group { 805 unsigned char tpg_chap_id; 806 /* TPG State */ 807 enum tpg_state_table tpg_state; 808 /* Target Portal Group Tag */ 809 u16 tpgt; 810 /* Id assigned to target sessions */ 811 u16 ntsih; 812 /* Number of active sessions */ 813 u32 nsessions; 814 /* Number of Network Portals available for this TPG */ 815 u32 num_tpg_nps; 816 /* Per TPG LIO specific session ID. */ 817 u32 sid; 818 /* Spinlock for adding/removing Network Portals */ 819 spinlock_t tpg_np_lock; 820 spinlock_t tpg_state_lock; 821 struct se_portal_group tpg_se_tpg; 822 struct mutex tpg_access_lock; 823 struct semaphore np_login_sem; 824 struct iscsi_tpg_attrib tpg_attrib; 825 struct iscsi_node_auth tpg_demo_auth; 826 /* Pointer to default list of iSCSI parameters for TPG */ 827 struct iscsi_param_list *param_list; 828 struct iscsi_tiqn *tpg_tiqn; 829 struct list_head tpg_gnp_list; 830 struct list_head tpg_list; 831 } ____cacheline_aligned; 832 833 struct iscsi_wwn_stat_grps { 834 struct config_group iscsi_stat_group; 835 struct config_group iscsi_instance_group; 836 struct config_group iscsi_sess_err_group; 837 struct config_group iscsi_tgt_attr_group; 838 struct config_group iscsi_login_stats_group; 839 struct config_group iscsi_logout_stats_group; 840 }; 841 842 struct iscsi_tiqn { 843 #define ISCSI_IQN_LEN 224 844 unsigned char tiqn[ISCSI_IQN_LEN]; 845 enum tiqn_state_table tiqn_state; 846 int tiqn_access_count; 847 u32 tiqn_active_tpgs; 848 u32 tiqn_ntpgs; 849 u32 tiqn_num_tpg_nps; 850 u32 tiqn_nsessions; 851 struct list_head tiqn_list; 852 struct list_head tiqn_tpg_list; 853 spinlock_t tiqn_state_lock; 854 spinlock_t tiqn_tpg_lock; 855 struct se_wwn tiqn_wwn; 856 struct iscsi_wwn_stat_grps tiqn_stat_grps; 857 int tiqn_index; 858 struct iscsi_sess_err_stats sess_err_stats; 859 struct iscsi_login_stats login_stats; 860 struct iscsi_logout_stats logout_stats; 861 } ____cacheline_aligned; 862 863 struct iscsit_global { 864 /* In core shutdown */ 865 u32 in_shutdown; 866 u32 active_ts; 867 /* Unique identifier used for the authentication daemon */ 868 u32 auth_id; 869 u32 inactive_ts; 870 #define ISCSIT_BITMAP_BITS 262144 871 /* Thread Set bitmap pointer */ 872 unsigned long *ts_bitmap; 873 spinlock_t ts_bitmap_lock; 874 /* Used for iSCSI discovery session authentication */ 875 struct iscsi_node_acl discovery_acl; 876 struct iscsi_portal_group *discovery_tpg; 877 }; 878 879 static inline u32 session_get_next_ttt(struct iscsi_session *session) 880 { 881 u32 ttt; 882 883 spin_lock_bh(&session->ttt_lock); 884 ttt = session->targ_xfer_tag++; 885 if (ttt == 0xFFFFFFFF) 886 ttt = session->targ_xfer_tag++; 887 spin_unlock_bh(&session->ttt_lock); 888 889 return ttt; 890 } 891 892 extern struct iscsi_cmd *iscsit_find_cmd_from_itt(struct iscsi_conn *, itt_t); 893 #endif /* ISCSI_TARGET_CORE_H */ 894