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 ISCSI_HW_OFFLOAD = 6, 78 }; 79 80 /* RFC-3720 7.1.4 Standard Connection State Diagram for a Target */ 81 enum target_conn_state_table { 82 TARG_CONN_STATE_FREE = 0x1, 83 TARG_CONN_STATE_XPT_UP = 0x3, 84 TARG_CONN_STATE_IN_LOGIN = 0x4, 85 TARG_CONN_STATE_LOGGED_IN = 0x5, 86 TARG_CONN_STATE_IN_LOGOUT = 0x6, 87 TARG_CONN_STATE_LOGOUT_REQUESTED = 0x7, 88 TARG_CONN_STATE_CLEANUP_WAIT = 0x8, 89 }; 90 91 /* RFC-3720 7.3.2 Session State Diagram for a Target */ 92 enum target_sess_state_table { 93 TARG_SESS_STATE_FREE = 0x1, 94 TARG_SESS_STATE_ACTIVE = 0x2, 95 TARG_SESS_STATE_LOGGED_IN = 0x3, 96 TARG_SESS_STATE_FAILED = 0x4, 97 TARG_SESS_STATE_IN_CONTINUE = 0x5, 98 }; 99 100 /* struct iscsi_data_count->type */ 101 enum data_count_type { 102 ISCSI_RX_DATA = 1, 103 ISCSI_TX_DATA = 2, 104 }; 105 106 /* struct iscsi_datain_req->dr_complete */ 107 enum datain_req_comp_table { 108 DATAIN_COMPLETE_NORMAL = 1, 109 DATAIN_COMPLETE_WITHIN_COMMAND_RECOVERY = 2, 110 DATAIN_COMPLETE_CONNECTION_RECOVERY = 3, 111 }; 112 113 /* struct iscsi_datain_req->recovery */ 114 enum datain_req_rec_table { 115 DATAIN_WITHIN_COMMAND_RECOVERY = 1, 116 DATAIN_CONNECTION_RECOVERY = 2, 117 }; 118 119 /* struct iscsi_portal_group->state */ 120 enum tpg_state_table { 121 TPG_STATE_FREE = 0, 122 TPG_STATE_ACTIVE = 1, 123 TPG_STATE_INACTIVE = 2, 124 TPG_STATE_COLD_RESET = 3, 125 }; 126 127 /* struct iscsi_tiqn->tiqn_state */ 128 enum tiqn_state_table { 129 TIQN_STATE_ACTIVE = 1, 130 TIQN_STATE_SHUTDOWN = 2, 131 }; 132 133 /* struct iscsi_cmd->cmd_flags */ 134 enum cmd_flags_table { 135 ICF_GOT_LAST_DATAOUT = 0x00000001, 136 ICF_GOT_DATACK_SNACK = 0x00000002, 137 ICF_NON_IMMEDIATE_UNSOLICITED_DATA = 0x00000004, 138 ICF_SENT_LAST_R2T = 0x00000008, 139 ICF_WITHIN_COMMAND_RECOVERY = 0x00000010, 140 ICF_CONTIG_MEMORY = 0x00000020, 141 ICF_ATTACHED_TO_RQUEUE = 0x00000040, 142 ICF_OOO_CMDSN = 0x00000080, 143 ICF_SENDTARGETS_ALL = 0x00000100, 144 ICF_SENDTARGETS_SINGLE = 0x00000200, 145 }; 146 147 /* struct iscsi_cmd->i_state */ 148 enum cmd_i_state_table { 149 ISTATE_NO_STATE = 0, 150 ISTATE_NEW_CMD = 1, 151 ISTATE_DEFERRED_CMD = 2, 152 ISTATE_UNSOLICITED_DATA = 3, 153 ISTATE_RECEIVE_DATAOUT = 4, 154 ISTATE_RECEIVE_DATAOUT_RECOVERY = 5, 155 ISTATE_RECEIVED_LAST_DATAOUT = 6, 156 ISTATE_WITHIN_DATAOUT_RECOVERY = 7, 157 ISTATE_IN_CONNECTION_RECOVERY = 8, 158 ISTATE_RECEIVED_TASKMGT = 9, 159 ISTATE_SEND_ASYNCMSG = 10, 160 ISTATE_SENT_ASYNCMSG = 11, 161 ISTATE_SEND_DATAIN = 12, 162 ISTATE_SEND_LAST_DATAIN = 13, 163 ISTATE_SENT_LAST_DATAIN = 14, 164 ISTATE_SEND_LOGOUTRSP = 15, 165 ISTATE_SENT_LOGOUTRSP = 16, 166 ISTATE_SEND_NOPIN = 17, 167 ISTATE_SENT_NOPIN = 18, 168 ISTATE_SEND_REJECT = 19, 169 ISTATE_SENT_REJECT = 20, 170 ISTATE_SEND_R2T = 21, 171 ISTATE_SENT_R2T = 22, 172 ISTATE_SEND_R2T_RECOVERY = 23, 173 ISTATE_SENT_R2T_RECOVERY = 24, 174 ISTATE_SEND_LAST_R2T = 25, 175 ISTATE_SENT_LAST_R2T = 26, 176 ISTATE_SEND_LAST_R2T_RECOVERY = 27, 177 ISTATE_SENT_LAST_R2T_RECOVERY = 28, 178 ISTATE_SEND_STATUS = 29, 179 ISTATE_SEND_STATUS_BROKEN_PC = 30, 180 ISTATE_SENT_STATUS = 31, 181 ISTATE_SEND_STATUS_RECOVERY = 32, 182 ISTATE_SENT_STATUS_RECOVERY = 33, 183 ISTATE_SEND_TASKMGTRSP = 34, 184 ISTATE_SENT_TASKMGTRSP = 35, 185 ISTATE_SEND_TEXTRSP = 36, 186 ISTATE_SENT_TEXTRSP = 37, 187 ISTATE_SEND_NOPIN_WANT_RESPONSE = 38, 188 ISTATE_SENT_NOPIN_WANT_RESPONSE = 39, 189 ISTATE_SEND_NOPIN_NO_RESPONSE = 40, 190 ISTATE_REMOVE = 41, 191 ISTATE_FREE = 42, 192 }; 193 194 /* Used for iscsi_recover_cmdsn() return values */ 195 enum recover_cmdsn_ret_table { 196 CMDSN_ERROR_CANNOT_RECOVER = -1, 197 CMDSN_NORMAL_OPERATION = 0, 198 CMDSN_LOWER_THAN_EXP = 1, 199 CMDSN_HIGHER_THAN_EXP = 2, 200 CMDSN_MAXCMDSN_OVERRUN = 3, 201 }; 202 203 /* Used for iscsi_handle_immediate_data() return values */ 204 enum immedate_data_ret_table { 205 IMMEDIATE_DATA_CANNOT_RECOVER = -1, 206 IMMEDIATE_DATA_NORMAL_OPERATION = 0, 207 IMMEDIATE_DATA_ERL1_CRC_FAILURE = 1, 208 }; 209 210 /* Used for iscsi_decide_dataout_action() return values */ 211 enum dataout_action_ret_table { 212 DATAOUT_CANNOT_RECOVER = -1, 213 DATAOUT_NORMAL = 0, 214 DATAOUT_SEND_R2T = 1, 215 DATAOUT_SEND_TO_TRANSPORT = 2, 216 DATAOUT_WITHIN_COMMAND_RECOVERY = 3, 217 }; 218 219 /* Used for struct iscsi_node_auth->naf_flags */ 220 enum naf_flags_table { 221 NAF_USERID_SET = 0x01, 222 NAF_PASSWORD_SET = 0x02, 223 NAF_USERID_IN_SET = 0x04, 224 NAF_PASSWORD_IN_SET = 0x08, 225 }; 226 227 /* Used by various struct timer_list to manage iSCSI specific state */ 228 enum iscsi_timer_flags_table { 229 ISCSI_TF_RUNNING = 0x01, 230 ISCSI_TF_STOP = 0x02, 231 ISCSI_TF_EXPIRED = 0x04, 232 }; 233 234 /* Used for struct iscsi_np->np_flags */ 235 enum np_flags_table { 236 NPF_IP_NETWORK = 0x00, 237 }; 238 239 /* Used for struct iscsi_np->np_thread_state */ 240 enum np_thread_state_table { 241 ISCSI_NP_THREAD_ACTIVE = 1, 242 ISCSI_NP_THREAD_INACTIVE = 2, 243 ISCSI_NP_THREAD_RESET = 3, 244 ISCSI_NP_THREAD_SHUTDOWN = 4, 245 ISCSI_NP_THREAD_EXIT = 5, 246 }; 247 248 struct iscsi_conn_ops { 249 u8 HeaderDigest; /* [0,1] == [None,CRC32C] */ 250 u8 DataDigest; /* [0,1] == [None,CRC32C] */ 251 u32 MaxRecvDataSegmentLength; /* [512..2**24-1] */ 252 u32 MaxXmitDataSegmentLength; /* [512..2**24-1] */ 253 /* 254 * iSER specific connection parameters 255 */ 256 u32 InitiatorRecvDataSegmentLength; /* [512..2**24-1] */ 257 u32 TargetRecvDataSegmentLength; /* [512..2**24-1] */ 258 }; 259 260 struct iscsi_sess_ops { 261 char InitiatorName[224]; 262 char InitiatorAlias[256]; 263 char TargetName[224]; 264 char TargetAlias[256]; 265 char TargetAddress[256]; 266 u16 TargetPortalGroupTag; /* [0..65535] */ 267 u16 MaxConnections; /* [1..65535] */ 268 u8 InitialR2T; /* [0,1] == [No,Yes] */ 269 u8 ImmediateData; /* [0,1] == [No,Yes] */ 270 u32 MaxBurstLength; /* [512..2**24-1] */ 271 u32 FirstBurstLength; /* [512..2**24-1] */ 272 u16 DefaultTime2Wait; /* [0..3600] */ 273 u16 DefaultTime2Retain; /* [0..3600] */ 274 u16 MaxOutstandingR2T; /* [1..65535] */ 275 u8 DataPDUInOrder; /* [0,1] == [No,Yes] */ 276 u8 DataSequenceInOrder; /* [0,1] == [No,Yes] */ 277 u8 ErrorRecoveryLevel; /* [0..2] */ 278 u8 SessionType; /* [0,1] == [Normal,Discovery]*/ 279 /* 280 * iSER specific session parameters 281 */ 282 u8 RDMAExtensions; /* [0,1] == [No,Yes] */ 283 }; 284 285 struct iscsi_queue_req { 286 int state; 287 struct iscsi_cmd *cmd; 288 struct list_head qr_list; 289 }; 290 291 struct iscsi_data_count { 292 int data_length; 293 int sync_and_steering; 294 enum data_count_type type; 295 u32 iov_count; 296 u32 ss_iov_count; 297 u32 ss_marker_count; 298 struct kvec *iov; 299 }; 300 301 struct iscsi_param_list { 302 bool iser; 303 struct list_head param_list; 304 struct list_head extra_response_list; 305 }; 306 307 struct iscsi_datain_req { 308 enum datain_req_comp_table dr_complete; 309 int generate_recovery_values; 310 enum datain_req_rec_table recovery; 311 u32 begrun; 312 u32 runlength; 313 u32 data_length; 314 u32 data_offset; 315 u32 data_sn; 316 u32 next_burst_len; 317 u32 read_data_done; 318 u32 seq_send_order; 319 struct list_head cmd_datain_node; 320 } ____cacheline_aligned; 321 322 struct iscsi_ooo_cmdsn { 323 u16 cid; 324 u32 batch_count; 325 u32 cmdsn; 326 u32 exp_cmdsn; 327 struct iscsi_cmd *cmd; 328 struct list_head ooo_list; 329 } ____cacheline_aligned; 330 331 struct iscsi_datain { 332 u8 flags; 333 u32 data_sn; 334 u32 length; 335 u32 offset; 336 } ____cacheline_aligned; 337 338 struct iscsi_r2t { 339 int seq_complete; 340 int recovery_r2t; 341 int sent_r2t; 342 u32 r2t_sn; 343 u32 offset; 344 u32 targ_xfer_tag; 345 u32 xfer_len; 346 struct list_head r2t_list; 347 } ____cacheline_aligned; 348 349 struct iscsi_cmd { 350 enum iscsi_timer_flags_table dataout_timer_flags; 351 /* DataOUT timeout retries */ 352 u8 dataout_timeout_retries; 353 /* Within command recovery count */ 354 u8 error_recovery_count; 355 /* iSCSI dependent state for out or order CmdSNs */ 356 enum cmd_i_state_table deferred_i_state; 357 /* iSCSI dependent state */ 358 enum cmd_i_state_table i_state; 359 /* Command is an immediate command (ISCSI_OP_IMMEDIATE set) */ 360 u8 immediate_cmd; 361 /* Immediate data present */ 362 u8 immediate_data; 363 /* iSCSI Opcode */ 364 u8 iscsi_opcode; 365 /* iSCSI Response Code */ 366 u8 iscsi_response; 367 /* Logout reason when iscsi_opcode == ISCSI_INIT_LOGOUT_CMND */ 368 u8 logout_reason; 369 /* Logout response code when iscsi_opcode == ISCSI_INIT_LOGOUT_CMND */ 370 u8 logout_response; 371 /* MaxCmdSN has been incremented */ 372 u8 maxcmdsn_inc; 373 /* Immediate Unsolicited Dataout */ 374 u8 unsolicited_data; 375 /* Reject reason code */ 376 u8 reject_reason; 377 /* CID contained in logout PDU when opcode == ISCSI_INIT_LOGOUT_CMND */ 378 u16 logout_cid; 379 /* Command flags */ 380 enum cmd_flags_table cmd_flags; 381 /* Initiator Task Tag assigned from Initiator */ 382 itt_t init_task_tag; 383 /* Target Transfer Tag assigned from Target */ 384 u32 targ_xfer_tag; 385 /* CmdSN assigned from Initiator */ 386 u32 cmd_sn; 387 /* ExpStatSN assigned from Initiator */ 388 u32 exp_stat_sn; 389 /* StatSN assigned to this ITT */ 390 u32 stat_sn; 391 /* DataSN Counter */ 392 u32 data_sn; 393 /* R2TSN Counter */ 394 u32 r2t_sn; 395 /* Last DataSN acknowledged via DataAck SNACK */ 396 u32 acked_data_sn; 397 /* Used for echoing NOPOUT ping data */ 398 u32 buf_ptr_size; 399 /* Used to store DataDigest */ 400 u32 data_crc; 401 /* Counter for MaxOutstandingR2T */ 402 u32 outstanding_r2ts; 403 /* Next R2T Offset when DataSequenceInOrder=Yes */ 404 u32 r2t_offset; 405 /* Iovec current and orig count for iscsi_cmd->iov_data */ 406 u32 iov_data_count; 407 u32 orig_iov_data_count; 408 /* Number of miscellaneous iovecs used for IP stack calls */ 409 u32 iov_misc_count; 410 /* Number of struct iscsi_pdu in struct iscsi_cmd->pdu_list */ 411 u32 pdu_count; 412 /* Next struct iscsi_pdu to send in struct iscsi_cmd->pdu_list */ 413 u32 pdu_send_order; 414 /* Current struct iscsi_pdu in struct iscsi_cmd->pdu_list */ 415 u32 pdu_start; 416 /* Next struct iscsi_seq to send in struct iscsi_cmd->seq_list */ 417 u32 seq_send_order; 418 /* Number of struct iscsi_seq in struct iscsi_cmd->seq_list */ 419 u32 seq_count; 420 /* Current struct iscsi_seq in struct iscsi_cmd->seq_list */ 421 u32 seq_no; 422 /* Lowest offset in current DataOUT sequence */ 423 u32 seq_start_offset; 424 /* Highest offset in current DataOUT sequence */ 425 u32 seq_end_offset; 426 /* Total size in bytes received so far of READ data */ 427 u32 read_data_done; 428 /* Total size in bytes received so far of WRITE data */ 429 u32 write_data_done; 430 /* Counter for FirstBurstLength key */ 431 u32 first_burst_len; 432 /* Counter for MaxBurstLength key */ 433 u32 next_burst_len; 434 /* Transfer size used for IP stack calls */ 435 u32 tx_size; 436 /* Buffer used for various purposes */ 437 void *buf_ptr; 438 /* Used by SendTargets=[iqn.,eui.] discovery */ 439 void *text_in_ptr; 440 /* See include/linux/dma-mapping.h */ 441 enum dma_data_direction data_direction; 442 /* iSCSI PDU Header + CRC */ 443 unsigned char pdu[ISCSI_HDR_LEN + ISCSI_CRC_LEN]; 444 /* Number of times struct iscsi_cmd is present in immediate queue */ 445 atomic_t immed_queue_count; 446 atomic_t response_queue_count; 447 spinlock_t datain_lock; 448 spinlock_t dataout_timeout_lock; 449 /* spinlock for protecting struct iscsi_cmd->i_state */ 450 spinlock_t istate_lock; 451 /* spinlock for adding within command recovery entries */ 452 spinlock_t error_lock; 453 /* spinlock for adding R2Ts */ 454 spinlock_t r2t_lock; 455 /* DataIN List */ 456 struct list_head datain_list; 457 /* R2T List */ 458 struct list_head cmd_r2t_list; 459 /* Timer for DataOUT */ 460 struct timer_list dataout_timer; 461 /* Iovecs for SCSI data payload RX/TX w/ kernel level sockets */ 462 struct kvec *iov_data; 463 /* Iovecs for miscellaneous purposes */ 464 #define ISCSI_MISC_IOVECS 5 465 struct kvec iov_misc[ISCSI_MISC_IOVECS]; 466 /* Array of struct iscsi_pdu used for DataPDUInOrder=No */ 467 struct iscsi_pdu *pdu_list; 468 /* Current struct iscsi_pdu used for DataPDUInOrder=No */ 469 struct iscsi_pdu *pdu_ptr; 470 /* Array of struct iscsi_seq used for DataSequenceInOrder=No */ 471 struct iscsi_seq *seq_list; 472 /* Current struct iscsi_seq used for DataSequenceInOrder=No */ 473 struct iscsi_seq *seq_ptr; 474 /* TMR Request when iscsi_opcode == ISCSI_OP_SCSI_TMFUNC */ 475 struct iscsi_tmr_req *tmr_req; 476 /* Connection this command is alligient to */ 477 struct iscsi_conn *conn; 478 /* Pointer to connection recovery entry */ 479 struct iscsi_conn_recovery *cr; 480 /* Session the command is part of, used for connection recovery */ 481 struct iscsi_session *sess; 482 /* list_head for connection list */ 483 struct list_head i_conn_node; 484 /* The TCM I/O descriptor that is accessed via container_of() */ 485 struct se_cmd se_cmd; 486 /* Sense buffer that will be mapped into outgoing status */ 487 #define ISCSI_SENSE_BUFFER_LEN (TRANSPORT_SENSE_BUFFER + 2) 488 unsigned char sense_buffer[ISCSI_SENSE_BUFFER_LEN]; 489 490 u32 padding; 491 u8 pad_bytes[4]; 492 493 struct scatterlist *first_data_sg; 494 u32 first_data_sg_off; 495 u32 kmapped_nents; 496 sense_reason_t sense_reason; 497 } ____cacheline_aligned; 498 499 struct iscsi_tmr_req { 500 bool task_reassign:1; 501 u32 exp_data_sn; 502 struct iscsi_cmd *ref_cmd; 503 struct iscsi_conn_recovery *conn_recovery; 504 struct se_tmr_req *se_tmr_req; 505 }; 506 507 struct iscsi_conn { 508 wait_queue_head_t queues_wq; 509 /* Authentication Successful for this connection */ 510 u8 auth_complete; 511 /* State connection is currently in */ 512 u8 conn_state; 513 u8 conn_logout_reason; 514 u8 network_transport; 515 enum iscsi_timer_flags_table nopin_timer_flags; 516 enum iscsi_timer_flags_table nopin_response_timer_flags; 517 /* Used to know what thread encountered a transport failure */ 518 u8 which_thread; 519 /* connection id assigned by the Initiator */ 520 u16 cid; 521 /* Remote TCP Port */ 522 u16 login_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 struct sockaddr_storage login_sockaddr; 533 struct sockaddr_storage local_sockaddr; 534 int conn_usage_count; 535 int conn_waiting_on_uc; 536 atomic_t check_immediate_queue; 537 atomic_t conn_logout_remove; 538 atomic_t connection_exit; 539 atomic_t connection_recovery; 540 atomic_t connection_reinstatement; 541 atomic_t connection_wait_rcfr; 542 atomic_t sleep_on_conn_wait_comp; 543 atomic_t transport_failed; 544 struct completion conn_post_wait_comp; 545 struct completion conn_wait_comp; 546 struct completion conn_wait_rcfr_comp; 547 struct completion conn_waiting_on_uc_comp; 548 struct completion conn_logout_comp; 549 struct completion tx_half_close_comp; 550 struct completion rx_half_close_comp; 551 /* socket used by this connection */ 552 struct socket *sock; 553 void (*orig_data_ready)(struct sock *); 554 void (*orig_state_change)(struct sock *); 555 #define LOGIN_FLAGS_READ_ACTIVE 1 556 #define LOGIN_FLAGS_CLOSED 2 557 #define LOGIN_FLAGS_READY 4 558 unsigned long login_flags; 559 struct delayed_work login_work; 560 struct delayed_work login_cleanup_work; 561 struct iscsi_login *login; 562 struct timer_list nopin_timer; 563 struct timer_list nopin_response_timer; 564 struct timer_list transport_timer; 565 struct task_struct *login_kworker; 566 /* Spinlock used for add/deleting cmd's from conn_cmd_list */ 567 spinlock_t cmd_lock; 568 spinlock_t conn_usage_lock; 569 spinlock_t immed_queue_lock; 570 spinlock_t nopin_timer_lock; 571 spinlock_t response_queue_lock; 572 spinlock_t state_lock; 573 /* libcrypto RX and TX contexts for crc32c */ 574 struct ahash_request *conn_rx_hash; 575 struct ahash_request *conn_tx_hash; 576 /* Used for scheduling TX and RX connection kthreads */ 577 cpumask_var_t conn_cpumask; 578 unsigned int conn_rx_reset_cpumask:1; 579 unsigned int conn_tx_reset_cpumask:1; 580 /* list_head of struct iscsi_cmd for this connection */ 581 struct list_head conn_cmd_list; 582 struct list_head immed_queue_list; 583 struct list_head response_queue_list; 584 struct iscsi_conn_ops *conn_ops; 585 struct iscsi_login *conn_login; 586 struct iscsit_transport *conn_transport; 587 struct iscsi_param_list *param_list; 588 /* Used for per connection auth state machine */ 589 void *auth_protocol; 590 void *context; 591 struct iscsi_login_thread_s *login_thread; 592 struct iscsi_portal_group *tpg; 593 struct iscsi_tpg_np *tpg_np; 594 /* Pointer to parent session */ 595 struct iscsi_session *sess; 596 int bitmap_id; 597 int rx_thread_active; 598 struct task_struct *rx_thread; 599 struct completion rx_login_comp; 600 int tx_thread_active; 601 struct task_struct *tx_thread; 602 /* list_head for session connection list */ 603 struct list_head conn_list; 604 } ____cacheline_aligned; 605 606 struct iscsi_conn_recovery { 607 u16 cid; 608 u32 cmd_count; 609 u32 maxrecvdatasegmentlength; 610 u32 maxxmitdatasegmentlength; 611 int ready_for_reallegiance; 612 struct list_head conn_recovery_cmd_list; 613 spinlock_t conn_recovery_cmd_lock; 614 struct timer_list time2retain_timer; 615 struct iscsi_session *sess; 616 struct list_head cr_list; 617 } ____cacheline_aligned; 618 619 struct iscsi_session { 620 u8 initiator_vendor; 621 u8 isid[6]; 622 enum iscsi_timer_flags_table time2retain_timer_flags; 623 u8 version_active; 624 u16 cid_called; 625 u16 conn_recovery_count; 626 u16 tsih; 627 /* state session is currently in */ 628 u32 session_state; 629 /* session wide counter: initiator assigned task tag */ 630 itt_t init_task_tag; 631 /* session wide counter: target assigned task tag */ 632 u32 targ_xfer_tag; 633 u32 cmdsn_window; 634 635 /* protects cmdsn values */ 636 struct mutex cmdsn_mutex; 637 /* session wide counter: expected command sequence number */ 638 u32 exp_cmd_sn; 639 /* session wide counter: maximum allowed command sequence number */ 640 atomic_t max_cmd_sn; 641 struct list_head sess_ooo_cmdsn_list; 642 643 /* LIO specific session ID */ 644 u32 sid; 645 char auth_type[8]; 646 /* unique within the target */ 647 int session_index; 648 /* Used for session reference counting */ 649 int session_usage_count; 650 int session_waiting_on_uc; 651 atomic_long_t cmd_pdus; 652 atomic_long_t rsp_pdus; 653 atomic_long_t tx_data_octets; 654 atomic_long_t rx_data_octets; 655 atomic_long_t conn_digest_errors; 656 atomic_long_t conn_timeout_errors; 657 u64 creation_time; 658 /* Number of active connections */ 659 atomic_t nconn; 660 atomic_t session_continuation; 661 atomic_t session_fall_back_to_erl0; 662 atomic_t session_logout; 663 atomic_t session_reinstatement; 664 atomic_t session_stop_active; 665 atomic_t sleep_on_sess_wait_comp; 666 /* connection list */ 667 struct list_head sess_conn_list; 668 struct list_head cr_active_list; 669 struct list_head cr_inactive_list; 670 spinlock_t conn_lock; 671 spinlock_t cr_a_lock; 672 spinlock_t cr_i_lock; 673 spinlock_t session_usage_lock; 674 spinlock_t ttt_lock; 675 struct completion async_msg_comp; 676 struct completion reinstatement_comp; 677 struct completion session_wait_comp; 678 struct completion session_waiting_on_uc_comp; 679 struct timer_list time2retain_timer; 680 struct iscsi_sess_ops *sess_ops; 681 struct se_session *se_sess; 682 struct iscsi_portal_group *tpg; 683 } ____cacheline_aligned; 684 685 struct iscsi_login { 686 u8 auth_complete; 687 u8 checked_for_existing; 688 u8 current_stage; 689 u8 leading_connection; 690 u8 first_request; 691 u8 version_min; 692 u8 version_max; 693 u8 login_complete; 694 u8 login_failed; 695 bool zero_tsih; 696 char isid[6]; 697 u32 cmd_sn; 698 itt_t init_task_tag; 699 u32 initial_exp_statsn; 700 u32 rsp_length; 701 u16 cid; 702 u16 tsih; 703 char req[ISCSI_HDR_LEN]; 704 char rsp[ISCSI_HDR_LEN]; 705 char *req_buf; 706 char *rsp_buf; 707 struct iscsi_conn *conn; 708 struct iscsi_np *np; 709 } ____cacheline_aligned; 710 711 struct iscsi_node_attrib { 712 u32 dataout_timeout; 713 u32 dataout_timeout_retries; 714 u32 default_erl; 715 u32 nopin_timeout; 716 u32 nopin_response_timeout; 717 u32 random_datain_pdu_offsets; 718 u32 random_datain_seq_offsets; 719 u32 random_r2t_offsets; 720 u32 tmr_cold_reset; 721 u32 tmr_warm_reset; 722 struct iscsi_node_acl *nacl; 723 }; 724 725 struct se_dev_entry_s; 726 727 struct iscsi_node_auth { 728 enum naf_flags_table naf_flags; 729 int authenticate_target; 730 /* Used for iscsit_global->discovery_auth, 731 * set to zero (auth disabled) by default */ 732 int enforce_discovery_auth; 733 #define MAX_USER_LEN 256 734 #define MAX_PASS_LEN 256 735 char userid[MAX_USER_LEN]; 736 char password[MAX_PASS_LEN]; 737 char userid_mutual[MAX_USER_LEN]; 738 char password_mutual[MAX_PASS_LEN]; 739 }; 740 741 #include "iscsi_target_stat.h" 742 743 struct iscsi_node_stat_grps { 744 struct config_group iscsi_sess_stats_group; 745 struct config_group iscsi_conn_stats_group; 746 }; 747 748 struct iscsi_node_acl { 749 struct se_node_acl se_node_acl; 750 struct iscsi_node_attrib node_attrib; 751 struct iscsi_node_auth node_auth; 752 struct iscsi_node_stat_grps node_stat_grps; 753 }; 754 755 struct iscsi_tpg_attrib { 756 u32 authentication; 757 u32 login_timeout; 758 u32 netif_timeout; 759 u32 generate_node_acls; 760 u32 cache_dynamic_acls; 761 u32 default_cmdsn_depth; 762 u32 demo_mode_write_protect; 763 u32 prod_mode_write_protect; 764 u32 demo_mode_discovery; 765 u32 default_erl; 766 u8 t10_pi; 767 u32 fabric_prot_type; 768 u32 tpg_enabled_sendtargets; 769 struct iscsi_portal_group *tpg; 770 }; 771 772 struct iscsi_np { 773 int np_network_transport; 774 int np_ip_proto; 775 int np_sock_type; 776 enum np_thread_state_table np_thread_state; 777 bool enabled; 778 enum iscsi_timer_flags_table np_login_timer_flags; 779 u32 np_exports; 780 enum np_flags_table np_flags; 781 spinlock_t np_thread_lock; 782 struct completion np_restart_comp; 783 struct socket *np_socket; 784 struct sockaddr_storage np_sockaddr; 785 struct task_struct *np_thread; 786 struct timer_list np_login_timer; 787 void *np_context; 788 struct iscsit_transport *np_transport; 789 struct list_head np_list; 790 } ____cacheline_aligned; 791 792 struct iscsi_tpg_np { 793 struct iscsi_np *tpg_np; 794 struct iscsi_portal_group *tpg; 795 struct iscsi_tpg_np *tpg_np_parent; 796 struct list_head tpg_np_list; 797 struct list_head tpg_np_child_list; 798 struct list_head tpg_np_parent_list; 799 struct se_tpg_np se_tpg_np; 800 spinlock_t tpg_np_parent_lock; 801 struct completion tpg_np_comp; 802 struct kref tpg_np_kref; 803 }; 804 805 struct iscsi_portal_group { 806 unsigned char tpg_chap_id; 807 /* TPG State */ 808 enum tpg_state_table tpg_state; 809 /* Target Portal Group Tag */ 810 u16 tpgt; 811 /* Id assigned to target sessions */ 812 u16 ntsih; 813 /* Number of active sessions */ 814 u32 nsessions; 815 /* Number of Network Portals available for this TPG */ 816 u32 num_tpg_nps; 817 /* Per TPG LIO specific session ID. */ 818 u32 sid; 819 /* Spinlock for adding/removing Network Portals */ 820 spinlock_t tpg_np_lock; 821 spinlock_t tpg_state_lock; 822 struct se_portal_group tpg_se_tpg; 823 struct mutex tpg_access_lock; 824 struct semaphore np_login_sem; 825 struct iscsi_tpg_attrib tpg_attrib; 826 struct iscsi_node_auth tpg_demo_auth; 827 /* Pointer to default list of iSCSI parameters for TPG */ 828 struct iscsi_param_list *param_list; 829 struct iscsi_tiqn *tpg_tiqn; 830 struct list_head tpg_gnp_list; 831 struct list_head tpg_list; 832 } ____cacheline_aligned; 833 834 struct iscsi_wwn_stat_grps { 835 struct config_group iscsi_stat_group; 836 struct config_group iscsi_instance_group; 837 struct config_group iscsi_sess_err_group; 838 struct config_group iscsi_tgt_attr_group; 839 struct config_group iscsi_login_stats_group; 840 struct config_group iscsi_logout_stats_group; 841 }; 842 843 struct iscsi_tiqn { 844 #define ISCSI_IQN_LEN 224 845 unsigned char tiqn[ISCSI_IQN_LEN]; 846 enum tiqn_state_table tiqn_state; 847 int tiqn_access_count; 848 u32 tiqn_active_tpgs; 849 u32 tiqn_ntpgs; 850 u32 tiqn_num_tpg_nps; 851 u32 tiqn_nsessions; 852 struct list_head tiqn_list; 853 struct list_head tiqn_tpg_list; 854 spinlock_t tiqn_state_lock; 855 spinlock_t tiqn_tpg_lock; 856 struct se_wwn tiqn_wwn; 857 struct iscsi_wwn_stat_grps tiqn_stat_grps; 858 int tiqn_index; 859 struct iscsi_sess_err_stats sess_err_stats; 860 struct iscsi_login_stats login_stats; 861 struct iscsi_logout_stats logout_stats; 862 } ____cacheline_aligned; 863 864 struct iscsit_global { 865 /* In core shutdown */ 866 u32 in_shutdown; 867 u32 active_ts; 868 /* Unique identifier used for the authentication daemon */ 869 u32 auth_id; 870 u32 inactive_ts; 871 #define ISCSIT_BITMAP_BITS 262144 872 /* Thread Set bitmap pointer */ 873 unsigned long *ts_bitmap; 874 spinlock_t ts_bitmap_lock; 875 /* Used for iSCSI discovery session authentication */ 876 struct iscsi_node_acl discovery_acl; 877 struct iscsi_portal_group *discovery_tpg; 878 }; 879 880 static inline u32 session_get_next_ttt(struct iscsi_session *session) 881 { 882 u32 ttt; 883 884 spin_lock_bh(&session->ttt_lock); 885 ttt = session->targ_xfer_tag++; 886 if (ttt == 0xFFFFFFFF) 887 ttt = session->targ_xfer_tag++; 888 spin_unlock_bh(&session->ttt_lock); 889 890 return ttt; 891 } 892 893 extern struct iscsi_cmd *iscsit_find_cmd_from_itt(struct iscsi_conn *, itt_t); 894 895 static inline void iscsit_thread_check_cpumask( 896 struct iscsi_conn *conn, 897 struct task_struct *p, 898 int mode) 899 { 900 /* 901 * mode == 1 signals iscsi_target_tx_thread() usage. 902 * mode == 0 signals iscsi_target_rx_thread() usage. 903 */ 904 if (mode == 1) { 905 if (!conn->conn_tx_reset_cpumask) 906 return; 907 conn->conn_tx_reset_cpumask = 0; 908 } else { 909 if (!conn->conn_rx_reset_cpumask) 910 return; 911 conn->conn_rx_reset_cpumask = 0; 912 } 913 /* 914 * Update the CPU mask for this single kthread so that 915 * both TX and RX kthreads are scheduled to run on the 916 * same CPU. 917 */ 918 set_cpus_allowed_ptr(p, conn->conn_cpumask); 919 } 920 #endif /* ISCSI_TARGET_CORE_H */ 921