1 /* SPDX-License-Identifier: GPL-2.0 */ 2 #ifndef ISCSI_TARGET_CORE_H 3 #define ISCSI_TARGET_CORE_H 4 5 #include <linux/dma-direction.h> /* enum dma_data_direction */ 6 #include <linux/list.h> /* struct list_head */ 7 #include <linux/sched.h> 8 #include <linux/socket.h> /* struct sockaddr_storage */ 9 #include <linux/types.h> /* u8 */ 10 #include <scsi/iscsi_proto.h> /* itt_t */ 11 #include <target/target_core_base.h> /* struct se_cmd */ 12 13 struct sock; 14 15 #define ISCSIT_VERSION "v4.1.0" 16 #define ISCSI_MAX_DATASN_MISSING_COUNT 16 17 #define ISCSI_TX_THREAD_TCP_TIMEOUT 2 18 #define ISCSI_RX_THREAD_TCP_TIMEOUT 2 19 #define SECONDS_FOR_ASYNC_LOGOUT 10 20 #define SECONDS_FOR_ASYNC_TEXT 10 21 #define SECONDS_FOR_LOGOUT_COMP 15 22 #define WHITE_SPACE " \t\v\f\n\r" 23 #define ISCSIT_MIN_TAGS 16 24 #define ISCSIT_EXTRA_TAGS 8 25 #define ISCSIT_TCP_BACKLOG 256 26 #define ISCSI_RX_THREAD_NAME "iscsi_trx" 27 #define ISCSI_TX_THREAD_NAME "iscsi_ttx" 28 29 /* struct iscsi_node_attrib sanity values */ 30 #define NA_DATAOUT_TIMEOUT 3 31 #define NA_DATAOUT_TIMEOUT_MAX 60 32 #define NA_DATAOUT_TIMEOUT_MIX 2 33 #define NA_DATAOUT_TIMEOUT_RETRIES 5 34 #define NA_DATAOUT_TIMEOUT_RETRIES_MAX 15 35 #define NA_DATAOUT_TIMEOUT_RETRIES_MIN 1 36 #define NA_NOPIN_TIMEOUT 15 37 #define NA_NOPIN_TIMEOUT_MAX 60 38 #define NA_NOPIN_TIMEOUT_MIN 3 39 #define NA_NOPIN_RESPONSE_TIMEOUT 30 40 #define NA_NOPIN_RESPONSE_TIMEOUT_MAX 60 41 #define NA_NOPIN_RESPONSE_TIMEOUT_MIN 3 42 #define NA_RANDOM_DATAIN_PDU_OFFSETS 0 43 #define NA_RANDOM_DATAIN_SEQ_OFFSETS 0 44 #define NA_RANDOM_R2T_OFFSETS 0 45 46 /* struct iscsi_tpg_attrib sanity values */ 47 #define TA_AUTHENTICATION 1 48 #define TA_LOGIN_TIMEOUT 15 49 #define TA_LOGIN_TIMEOUT_MAX 30 50 #define TA_LOGIN_TIMEOUT_MIN 5 51 #define TA_NETIF_TIMEOUT 2 52 #define TA_NETIF_TIMEOUT_MAX 15 53 #define TA_NETIF_TIMEOUT_MIN 2 54 #define TA_GENERATE_NODE_ACLS 0 55 #define TA_DEFAULT_CMDSN_DEPTH 64 56 #define TA_DEFAULT_CMDSN_DEPTH_MAX 512 57 #define TA_DEFAULT_CMDSN_DEPTH_MIN 1 58 #define TA_CACHE_DYNAMIC_ACLS 0 59 /* Enabled by default in demo mode (generic_node_acls=1) */ 60 #define TA_DEMO_MODE_WRITE_PROTECT 1 61 /* Disabled by default in production mode w/ explict ACLs */ 62 #define TA_PROD_MODE_WRITE_PROTECT 0 63 #define TA_DEMO_MODE_DISCOVERY 1 64 #define TA_DEFAULT_ERL 0 65 #define TA_CACHE_CORE_NPS 0 66 /* T10 protection information disabled by default */ 67 #define TA_DEFAULT_T10_PI 0 68 #define TA_DEFAULT_FABRIC_PROT_TYPE 0 69 /* TPG status needs to be enabled to return sendtargets discovery endpoint info */ 70 #define TA_DEFAULT_TPG_ENABLED_SENDTARGETS 1 71 /* 72 * Used to control the sending of keys with optional to respond state bit, 73 * as a workaround for non RFC compliant initiators,that do not propose, 74 * nor respond to specific keys required for login to complete. 75 * 76 * See iscsi_check_proposer_for_optional_reply() for more details. 77 */ 78 #define TA_DEFAULT_LOGIN_KEYS_WORKAROUND 1 79 80 #define ISCSI_IOV_DATA_BUFFER 5 81 82 enum iscsit_transport_type { 83 ISCSI_TCP = 0, 84 ISCSI_SCTP_TCP = 1, 85 ISCSI_SCTP_UDP = 2, 86 ISCSI_IWARP_TCP = 3, 87 ISCSI_IWARP_SCTP = 4, 88 ISCSI_INFINIBAND = 5, 89 ISCSI_CXGBIT = 6, 90 }; 91 92 /* RFC-3720 7.1.4 Standard Connection State Diagram for a Target */ 93 enum target_conn_state_table { 94 TARG_CONN_STATE_FREE = 0x1, 95 TARG_CONN_STATE_XPT_UP = 0x3, 96 TARG_CONN_STATE_IN_LOGIN = 0x4, 97 TARG_CONN_STATE_LOGGED_IN = 0x5, 98 TARG_CONN_STATE_IN_LOGOUT = 0x6, 99 TARG_CONN_STATE_LOGOUT_REQUESTED = 0x7, 100 TARG_CONN_STATE_CLEANUP_WAIT = 0x8, 101 }; 102 103 /* RFC-3720 7.3.2 Session State Diagram for a Target */ 104 enum target_sess_state_table { 105 TARG_SESS_STATE_FREE = 0x1, 106 TARG_SESS_STATE_ACTIVE = 0x2, 107 TARG_SESS_STATE_LOGGED_IN = 0x3, 108 TARG_SESS_STATE_FAILED = 0x4, 109 TARG_SESS_STATE_IN_CONTINUE = 0x5, 110 }; 111 112 /* struct iscsi_data_count->type */ 113 enum data_count_type { 114 ISCSI_RX_DATA = 1, 115 ISCSI_TX_DATA = 2, 116 }; 117 118 /* struct iscsi_datain_req->dr_complete */ 119 enum datain_req_comp_table { 120 DATAIN_COMPLETE_NORMAL = 1, 121 DATAIN_COMPLETE_WITHIN_COMMAND_RECOVERY = 2, 122 DATAIN_COMPLETE_CONNECTION_RECOVERY = 3, 123 }; 124 125 /* struct iscsi_datain_req->recovery */ 126 enum datain_req_rec_table { 127 DATAIN_WITHIN_COMMAND_RECOVERY = 1, 128 DATAIN_CONNECTION_RECOVERY = 2, 129 }; 130 131 /* struct iscsi_portal_group->state */ 132 enum tpg_state_table { 133 TPG_STATE_FREE = 0, 134 TPG_STATE_ACTIVE = 1, 135 TPG_STATE_INACTIVE = 2, 136 TPG_STATE_COLD_RESET = 3, 137 }; 138 139 /* struct iscsi_tiqn->tiqn_state */ 140 enum tiqn_state_table { 141 TIQN_STATE_ACTIVE = 1, 142 TIQN_STATE_SHUTDOWN = 2, 143 }; 144 145 /* struct iscsi_cmd->cmd_flags */ 146 enum cmd_flags_table { 147 ICF_GOT_LAST_DATAOUT = 0x00000001, 148 ICF_GOT_DATACK_SNACK = 0x00000002, 149 ICF_NON_IMMEDIATE_UNSOLICITED_DATA = 0x00000004, 150 ICF_SENT_LAST_R2T = 0x00000008, 151 ICF_WITHIN_COMMAND_RECOVERY = 0x00000010, 152 ICF_CONTIG_MEMORY = 0x00000020, 153 ICF_ATTACHED_TO_RQUEUE = 0x00000040, 154 ICF_OOO_CMDSN = 0x00000080, 155 ICF_SENDTARGETS_ALL = 0x00000100, 156 ICF_SENDTARGETS_SINGLE = 0x00000200, 157 }; 158 159 /* struct iscsi_cmd->i_state */ 160 enum cmd_i_state_table { 161 ISTATE_NO_STATE = 0, 162 ISTATE_NEW_CMD = 1, 163 ISTATE_DEFERRED_CMD = 2, 164 ISTATE_UNSOLICITED_DATA = 3, 165 ISTATE_RECEIVE_DATAOUT = 4, 166 ISTATE_RECEIVE_DATAOUT_RECOVERY = 5, 167 ISTATE_RECEIVED_LAST_DATAOUT = 6, 168 ISTATE_WITHIN_DATAOUT_RECOVERY = 7, 169 ISTATE_IN_CONNECTION_RECOVERY = 8, 170 ISTATE_RECEIVED_TASKMGT = 9, 171 ISTATE_SEND_ASYNCMSG = 10, 172 ISTATE_SENT_ASYNCMSG = 11, 173 ISTATE_SEND_DATAIN = 12, 174 ISTATE_SEND_LAST_DATAIN = 13, 175 ISTATE_SENT_LAST_DATAIN = 14, 176 ISTATE_SEND_LOGOUTRSP = 15, 177 ISTATE_SENT_LOGOUTRSP = 16, 178 ISTATE_SEND_NOPIN = 17, 179 ISTATE_SENT_NOPIN = 18, 180 ISTATE_SEND_REJECT = 19, 181 ISTATE_SENT_REJECT = 20, 182 ISTATE_SEND_R2T = 21, 183 ISTATE_SENT_R2T = 22, 184 ISTATE_SEND_R2T_RECOVERY = 23, 185 ISTATE_SENT_R2T_RECOVERY = 24, 186 ISTATE_SEND_LAST_R2T = 25, 187 ISTATE_SENT_LAST_R2T = 26, 188 ISTATE_SEND_LAST_R2T_RECOVERY = 27, 189 ISTATE_SENT_LAST_R2T_RECOVERY = 28, 190 ISTATE_SEND_STATUS = 29, 191 ISTATE_SEND_STATUS_BROKEN_PC = 30, 192 ISTATE_SENT_STATUS = 31, 193 ISTATE_SEND_STATUS_RECOVERY = 32, 194 ISTATE_SENT_STATUS_RECOVERY = 33, 195 ISTATE_SEND_TASKMGTRSP = 34, 196 ISTATE_SENT_TASKMGTRSP = 35, 197 ISTATE_SEND_TEXTRSP = 36, 198 ISTATE_SENT_TEXTRSP = 37, 199 ISTATE_SEND_NOPIN_WANT_RESPONSE = 38, 200 ISTATE_SENT_NOPIN_WANT_RESPONSE = 39, 201 ISTATE_SEND_NOPIN_NO_RESPONSE = 40, 202 ISTATE_REMOVE = 41, 203 ISTATE_FREE = 42, 204 }; 205 206 /* Used for iscsi_recover_cmdsn() return values */ 207 enum recover_cmdsn_ret_table { 208 CMDSN_ERROR_CANNOT_RECOVER = -1, 209 CMDSN_NORMAL_OPERATION = 0, 210 CMDSN_LOWER_THAN_EXP = 1, 211 CMDSN_HIGHER_THAN_EXP = 2, 212 CMDSN_MAXCMDSN_OVERRUN = 3, 213 }; 214 215 /* Used for iscsi_handle_immediate_data() return values */ 216 enum immedate_data_ret_table { 217 IMMEDIATE_DATA_CANNOT_RECOVER = -1, 218 IMMEDIATE_DATA_NORMAL_OPERATION = 0, 219 IMMEDIATE_DATA_ERL1_CRC_FAILURE = 1, 220 }; 221 222 /* Used for iscsi_decide_dataout_action() return values */ 223 enum dataout_action_ret_table { 224 DATAOUT_CANNOT_RECOVER = -1, 225 DATAOUT_NORMAL = 0, 226 DATAOUT_SEND_R2T = 1, 227 DATAOUT_SEND_TO_TRANSPORT = 2, 228 DATAOUT_WITHIN_COMMAND_RECOVERY = 3, 229 }; 230 231 /* Used for struct iscsi_node_auth->naf_flags */ 232 enum naf_flags_table { 233 NAF_USERID_SET = 0x01, 234 NAF_PASSWORD_SET = 0x02, 235 NAF_USERID_IN_SET = 0x04, 236 NAF_PASSWORD_IN_SET = 0x08, 237 }; 238 239 /* Used by various struct timer_list to manage iSCSI specific state */ 240 enum iscsi_timer_flags_table { 241 ISCSI_TF_RUNNING = 0x01, 242 ISCSI_TF_STOP = 0x02, 243 ISCSI_TF_EXPIRED = 0x04, 244 }; 245 246 /* Used for struct iscsi_np->np_flags */ 247 enum np_flags_table { 248 NPF_IP_NETWORK = 0x00, 249 }; 250 251 /* Used for struct iscsi_np->np_thread_state */ 252 enum np_thread_state_table { 253 ISCSI_NP_THREAD_ACTIVE = 1, 254 ISCSI_NP_THREAD_INACTIVE = 2, 255 ISCSI_NP_THREAD_RESET = 3, 256 ISCSI_NP_THREAD_SHUTDOWN = 4, 257 ISCSI_NP_THREAD_EXIT = 5, 258 }; 259 260 struct iscsi_conn_ops { 261 u8 HeaderDigest; /* [0,1] == [None,CRC32C] */ 262 u8 DataDigest; /* [0,1] == [None,CRC32C] */ 263 u32 MaxRecvDataSegmentLength; /* [512..2**24-1] */ 264 u32 MaxXmitDataSegmentLength; /* [512..2**24-1] */ 265 /* 266 * iSER specific connection parameters 267 */ 268 u32 InitiatorRecvDataSegmentLength; /* [512..2**24-1] */ 269 u32 TargetRecvDataSegmentLength; /* [512..2**24-1] */ 270 }; 271 272 struct iscsi_sess_ops { 273 char InitiatorName[224]; 274 char InitiatorAlias[256]; 275 char TargetName[224]; 276 char TargetAlias[256]; 277 char TargetAddress[256]; 278 u16 TargetPortalGroupTag; /* [0..65535] */ 279 u16 MaxConnections; /* [1..65535] */ 280 u8 InitialR2T; /* [0,1] == [No,Yes] */ 281 u8 ImmediateData; /* [0,1] == [No,Yes] */ 282 u32 MaxBurstLength; /* [512..2**24-1] */ 283 u32 FirstBurstLength; /* [512..2**24-1] */ 284 u16 DefaultTime2Wait; /* [0..3600] */ 285 u16 DefaultTime2Retain; /* [0..3600] */ 286 u16 MaxOutstandingR2T; /* [1..65535] */ 287 u8 DataPDUInOrder; /* [0,1] == [No,Yes] */ 288 u8 DataSequenceInOrder; /* [0,1] == [No,Yes] */ 289 u8 ErrorRecoveryLevel; /* [0..2] */ 290 u8 SessionType; /* [0,1] == [Normal,Discovery]*/ 291 /* 292 * iSER specific session parameters 293 */ 294 u8 RDMAExtensions; /* [0,1] == [No,Yes] */ 295 }; 296 297 struct iscsi_queue_req { 298 int state; 299 struct iscsi_cmd *cmd; 300 struct list_head qr_list; 301 }; 302 303 struct iscsi_data_count { 304 int data_length; 305 int sync_and_steering; 306 enum data_count_type type; 307 u32 iov_count; 308 u32 ss_iov_count; 309 u32 ss_marker_count; 310 struct kvec *iov; 311 }; 312 313 struct iscsi_param_list { 314 bool iser; 315 struct list_head param_list; 316 struct list_head extra_response_list; 317 }; 318 319 struct iscsi_datain_req { 320 enum datain_req_comp_table dr_complete; 321 int generate_recovery_values; 322 enum datain_req_rec_table recovery; 323 u32 begrun; 324 u32 runlength; 325 u32 data_length; 326 u32 data_offset; 327 u32 data_sn; 328 u32 next_burst_len; 329 u32 read_data_done; 330 u32 seq_send_order; 331 struct list_head cmd_datain_node; 332 } ____cacheline_aligned; 333 334 struct iscsi_ooo_cmdsn { 335 u16 cid; 336 u32 batch_count; 337 u32 cmdsn; 338 u32 exp_cmdsn; 339 struct iscsi_cmd *cmd; 340 struct list_head ooo_list; 341 } ____cacheline_aligned; 342 343 struct iscsi_datain { 344 u8 flags; 345 u32 data_sn; 346 u32 length; 347 u32 offset; 348 } ____cacheline_aligned; 349 350 struct iscsi_r2t { 351 int seq_complete; 352 int recovery_r2t; 353 int sent_r2t; 354 u32 r2t_sn; 355 u32 offset; 356 u32 targ_xfer_tag; 357 u32 xfer_len; 358 struct list_head r2t_list; 359 } ____cacheline_aligned; 360 361 struct iscsi_cmd { 362 enum iscsi_timer_flags_table dataout_timer_flags; 363 /* DataOUT timeout retries */ 364 u8 dataout_timeout_retries; 365 /* Within command recovery count */ 366 u8 error_recovery_count; 367 /* iSCSI dependent state for out or order CmdSNs */ 368 enum cmd_i_state_table deferred_i_state; 369 /* iSCSI dependent state */ 370 enum cmd_i_state_table i_state; 371 /* Command is an immediate command (ISCSI_OP_IMMEDIATE set) */ 372 u8 immediate_cmd; 373 /* Immediate data present */ 374 u8 immediate_data; 375 /* iSCSI Opcode */ 376 u8 iscsi_opcode; 377 /* iSCSI Response Code */ 378 u8 iscsi_response; 379 /* Logout reason when iscsi_opcode == ISCSI_INIT_LOGOUT_CMND */ 380 u8 logout_reason; 381 /* Logout response code when iscsi_opcode == ISCSI_INIT_LOGOUT_CMND */ 382 u8 logout_response; 383 /* MaxCmdSN has been incremented */ 384 u8 maxcmdsn_inc; 385 /* Immediate Unsolicited Dataout */ 386 u8 unsolicited_data; 387 /* Reject reason code */ 388 u8 reject_reason; 389 /* CID contained in logout PDU when opcode == ISCSI_INIT_LOGOUT_CMND */ 390 u16 logout_cid; 391 /* Command flags */ 392 enum cmd_flags_table cmd_flags; 393 /* Initiator Task Tag assigned from Initiator */ 394 itt_t init_task_tag; 395 /* Target Transfer Tag assigned from Target */ 396 u32 targ_xfer_tag; 397 /* CmdSN assigned from Initiator */ 398 u32 cmd_sn; 399 /* ExpStatSN assigned from Initiator */ 400 u32 exp_stat_sn; 401 /* StatSN assigned to this ITT */ 402 u32 stat_sn; 403 /* DataSN Counter */ 404 u32 data_sn; 405 /* R2TSN Counter */ 406 u32 r2t_sn; 407 /* Last DataSN acknowledged via DataAck SNACK */ 408 u32 acked_data_sn; 409 /* Used for echoing NOPOUT ping data */ 410 u32 buf_ptr_size; 411 /* Used to store DataDigest */ 412 u32 data_crc; 413 /* Counter for MaxOutstandingR2T */ 414 u32 outstanding_r2ts; 415 /* Next R2T Offset when DataSequenceInOrder=Yes */ 416 u32 r2t_offset; 417 /* Iovec current and orig count for iscsi_cmd->iov_data */ 418 u32 iov_data_count; 419 u32 orig_iov_data_count; 420 /* Number of miscellaneous iovecs used for IP stack calls */ 421 u32 iov_misc_count; 422 /* Number of struct iscsi_pdu in struct iscsi_cmd->pdu_list */ 423 u32 pdu_count; 424 /* Next struct iscsi_pdu to send in struct iscsi_cmd->pdu_list */ 425 u32 pdu_send_order; 426 /* Current struct iscsi_pdu in struct iscsi_cmd->pdu_list */ 427 u32 pdu_start; 428 /* Next struct iscsi_seq to send in struct iscsi_cmd->seq_list */ 429 u32 seq_send_order; 430 /* Number of struct iscsi_seq in struct iscsi_cmd->seq_list */ 431 u32 seq_count; 432 /* Current struct iscsi_seq in struct iscsi_cmd->seq_list */ 433 u32 seq_no; 434 /* Lowest offset in current DataOUT sequence */ 435 u32 seq_start_offset; 436 /* Highest offset in current DataOUT sequence */ 437 u32 seq_end_offset; 438 /* Total size in bytes received so far of READ data */ 439 u32 read_data_done; 440 /* Total size in bytes received so far of WRITE data */ 441 u32 write_data_done; 442 /* Counter for FirstBurstLength key */ 443 u32 first_burst_len; 444 /* Counter for MaxBurstLength key */ 445 u32 next_burst_len; 446 /* Transfer size used for IP stack calls */ 447 u32 tx_size; 448 /* Buffer used for various purposes */ 449 void *buf_ptr; 450 /* Used by SendTargets=[iqn.,eui.] discovery */ 451 void *text_in_ptr; 452 /* See include/linux/dma-mapping.h */ 453 enum dma_data_direction data_direction; 454 /* iSCSI PDU Header + CRC */ 455 unsigned char pdu[ISCSI_HDR_LEN + ISCSI_CRC_LEN]; 456 /* Number of times struct iscsi_cmd is present in immediate queue */ 457 atomic_t immed_queue_count; 458 atomic_t response_queue_count; 459 spinlock_t datain_lock; 460 spinlock_t dataout_timeout_lock; 461 /* spinlock for protecting struct iscsi_cmd->i_state */ 462 spinlock_t istate_lock; 463 /* spinlock for adding within command recovery entries */ 464 spinlock_t error_lock; 465 /* spinlock for adding R2Ts */ 466 spinlock_t r2t_lock; 467 /* DataIN List */ 468 struct list_head datain_list; 469 /* R2T List */ 470 struct list_head cmd_r2t_list; 471 /* Timer for DataOUT */ 472 struct timer_list dataout_timer; 473 /* Iovecs for SCSI data payload RX/TX w/ kernel level sockets */ 474 struct kvec *iov_data; 475 /* Iovecs for miscellaneous purposes */ 476 #define ISCSI_MISC_IOVECS 5 477 struct kvec iov_misc[ISCSI_MISC_IOVECS]; 478 /* Array of struct iscsi_pdu used for DataPDUInOrder=No */ 479 struct iscsi_pdu *pdu_list; 480 /* Current struct iscsi_pdu used for DataPDUInOrder=No */ 481 struct iscsi_pdu *pdu_ptr; 482 /* Array of struct iscsi_seq used for DataSequenceInOrder=No */ 483 struct iscsi_seq *seq_list; 484 /* Current struct iscsi_seq used for DataSequenceInOrder=No */ 485 struct iscsi_seq *seq_ptr; 486 /* TMR Request when iscsi_opcode == ISCSI_OP_SCSI_TMFUNC */ 487 struct iscsi_tmr_req *tmr_req; 488 /* Connection this command is alligient to */ 489 struct iscsi_conn *conn; 490 /* Pointer to connection recovery entry */ 491 struct iscsi_conn_recovery *cr; 492 /* Session the command is part of, used for connection recovery */ 493 struct iscsi_session *sess; 494 /* list_head for connection list */ 495 struct list_head i_conn_node; 496 /* The TCM I/O descriptor that is accessed via container_of() */ 497 struct se_cmd se_cmd; 498 /* Sense buffer that will be mapped into outgoing status */ 499 #define ISCSI_SENSE_BUFFER_LEN (TRANSPORT_SENSE_BUFFER + 2) 500 unsigned char sense_buffer[ISCSI_SENSE_BUFFER_LEN]; 501 502 u32 padding; 503 u8 pad_bytes[4]; 504 505 struct scatterlist *first_data_sg; 506 u32 first_data_sg_off; 507 u32 kmapped_nents; 508 sense_reason_t sense_reason; 509 } ____cacheline_aligned; 510 511 struct iscsi_tmr_req { 512 bool task_reassign:1; 513 u32 exp_data_sn; 514 struct iscsi_cmd *ref_cmd; 515 struct iscsi_conn_recovery *conn_recovery; 516 struct se_tmr_req *se_tmr_req; 517 }; 518 519 struct iscsi_conn { 520 wait_queue_head_t queues_wq; 521 /* Authentication Successful for this connection */ 522 u8 auth_complete; 523 /* State connection is currently in */ 524 u8 conn_state; 525 u8 conn_logout_reason; 526 u8 network_transport; 527 enum iscsi_timer_flags_table nopin_timer_flags; 528 enum iscsi_timer_flags_table nopin_response_timer_flags; 529 /* Used to know what thread encountered a transport failure */ 530 u8 which_thread; 531 /* connection id assigned by the Initiator */ 532 u16 cid; 533 /* Remote TCP Port */ 534 u16 login_port; 535 int net_size; 536 int login_family; 537 u32 auth_id; 538 u32 conn_flags; 539 /* Used for iscsi_tx_login_rsp() */ 540 itt_t login_itt; 541 u32 exp_statsn; 542 /* Per connection status sequence number */ 543 u32 stat_sn; 544 struct sockaddr_storage login_sockaddr; 545 struct sockaddr_storage local_sockaddr; 546 int conn_usage_count; 547 int conn_waiting_on_uc; 548 atomic_t check_immediate_queue; 549 atomic_t conn_logout_remove; 550 atomic_t connection_exit; 551 atomic_t connection_recovery; 552 atomic_t connection_reinstatement; 553 atomic_t connection_wait_rcfr; 554 atomic_t sleep_on_conn_wait_comp; 555 atomic_t transport_failed; 556 struct completion conn_post_wait_comp; 557 struct completion conn_wait_comp; 558 struct completion conn_wait_rcfr_comp; 559 struct completion conn_waiting_on_uc_comp; 560 struct completion conn_logout_comp; 561 struct completion tx_half_close_comp; 562 struct completion rx_half_close_comp; 563 /* socket used by this connection */ 564 struct socket *sock; 565 void (*orig_data_ready)(struct sock *); 566 void (*orig_state_change)(struct sock *); 567 #define LOGIN_FLAGS_READ_ACTIVE 1 568 #define LOGIN_FLAGS_CLOSED 2 569 #define LOGIN_FLAGS_READY 4 570 #define LOGIN_FLAGS_INITIAL_PDU 8 571 unsigned long login_flags; 572 struct delayed_work login_work; 573 struct iscsi_login *login; 574 struct timer_list nopin_timer; 575 struct timer_list nopin_response_timer; 576 struct timer_list transport_timer; 577 struct task_struct *login_kworker; 578 /* Spinlock used for add/deleting cmd's from conn_cmd_list */ 579 spinlock_t cmd_lock; 580 spinlock_t conn_usage_lock; 581 spinlock_t immed_queue_lock; 582 spinlock_t nopin_timer_lock; 583 spinlock_t response_queue_lock; 584 spinlock_t state_lock; 585 /* libcrypto RX and TX contexts for crc32c */ 586 struct ahash_request *conn_rx_hash; 587 struct ahash_request *conn_tx_hash; 588 /* Used for scheduling TX and RX connection kthreads */ 589 cpumask_var_t conn_cpumask; 590 unsigned int conn_rx_reset_cpumask:1; 591 unsigned int conn_tx_reset_cpumask:1; 592 /* list_head of struct iscsi_cmd for this connection */ 593 struct list_head conn_cmd_list; 594 struct list_head immed_queue_list; 595 struct list_head response_queue_list; 596 struct iscsi_conn_ops *conn_ops; 597 struct iscsi_login *conn_login; 598 struct iscsit_transport *conn_transport; 599 struct iscsi_param_list *param_list; 600 /* Used for per connection auth state machine */ 601 void *auth_protocol; 602 void *context; 603 struct iscsi_login_thread_s *login_thread; 604 struct iscsi_portal_group *tpg; 605 struct iscsi_tpg_np *tpg_np; 606 /* Pointer to parent session */ 607 struct iscsi_session *sess; 608 int bitmap_id; 609 int rx_thread_active; 610 struct task_struct *rx_thread; 611 struct completion rx_login_comp; 612 int tx_thread_active; 613 struct task_struct *tx_thread; 614 /* list_head for session connection list */ 615 struct list_head conn_list; 616 } ____cacheline_aligned; 617 618 struct iscsi_conn_recovery { 619 u16 cid; 620 u32 cmd_count; 621 u32 maxrecvdatasegmentlength; 622 u32 maxxmitdatasegmentlength; 623 int ready_for_reallegiance; 624 struct list_head conn_recovery_cmd_list; 625 spinlock_t conn_recovery_cmd_lock; 626 struct timer_list time2retain_timer; 627 struct iscsi_session *sess; 628 struct list_head cr_list; 629 } ____cacheline_aligned; 630 631 struct iscsi_session { 632 u8 initiator_vendor; 633 u8 isid[6]; 634 enum iscsi_timer_flags_table time2retain_timer_flags; 635 u8 version_active; 636 u16 cid_called; 637 u16 conn_recovery_count; 638 u16 tsih; 639 /* state session is currently in */ 640 u32 session_state; 641 /* session wide counter: initiator assigned task tag */ 642 itt_t init_task_tag; 643 /* session wide counter: target assigned task tag */ 644 u32 targ_xfer_tag; 645 u32 cmdsn_window; 646 647 /* protects cmdsn values */ 648 struct mutex cmdsn_mutex; 649 /* session wide counter: expected command sequence number */ 650 u32 exp_cmd_sn; 651 /* session wide counter: maximum allowed command sequence number */ 652 atomic_t max_cmd_sn; 653 struct list_head sess_ooo_cmdsn_list; 654 655 /* LIO specific session ID */ 656 u32 sid; 657 char auth_type[8]; 658 /* unique within the target */ 659 int session_index; 660 /* Used for session reference counting */ 661 int session_usage_count; 662 int session_waiting_on_uc; 663 atomic_long_t cmd_pdus; 664 atomic_long_t rsp_pdus; 665 atomic_long_t tx_data_octets; 666 atomic_long_t rx_data_octets; 667 atomic_long_t conn_digest_errors; 668 atomic_long_t conn_timeout_errors; 669 u64 creation_time; 670 /* Number of active connections */ 671 atomic_t nconn; 672 atomic_t session_continuation; 673 atomic_t session_fall_back_to_erl0; 674 atomic_t session_logout; 675 atomic_t session_reinstatement; 676 atomic_t session_stop_active; 677 atomic_t sleep_on_sess_wait_comp; 678 /* connection list */ 679 struct list_head sess_conn_list; 680 struct list_head cr_active_list; 681 struct list_head cr_inactive_list; 682 spinlock_t conn_lock; 683 spinlock_t cr_a_lock; 684 spinlock_t cr_i_lock; 685 spinlock_t session_usage_lock; 686 spinlock_t ttt_lock; 687 struct completion async_msg_comp; 688 struct completion reinstatement_comp; 689 struct completion session_wait_comp; 690 struct completion session_waiting_on_uc_comp; 691 struct timer_list time2retain_timer; 692 struct iscsi_sess_ops *sess_ops; 693 struct se_session *se_sess; 694 struct iscsi_portal_group *tpg; 695 } ____cacheline_aligned; 696 697 struct iscsi_login { 698 u8 auth_complete; 699 u8 checked_for_existing; 700 u8 current_stage; 701 u8 leading_connection; 702 u8 first_request; 703 u8 version_min; 704 u8 version_max; 705 u8 login_complete; 706 u8 login_failed; 707 bool zero_tsih; 708 char isid[6]; 709 u32 cmd_sn; 710 itt_t init_task_tag; 711 u32 initial_exp_statsn; 712 u32 rsp_length; 713 u16 cid; 714 u16 tsih; 715 char req[ISCSI_HDR_LEN]; 716 char rsp[ISCSI_HDR_LEN]; 717 char *req_buf; 718 char *rsp_buf; 719 struct iscsi_conn *conn; 720 struct iscsi_np *np; 721 } ____cacheline_aligned; 722 723 struct iscsi_node_attrib { 724 u32 dataout_timeout; 725 u32 dataout_timeout_retries; 726 u32 default_erl; 727 u32 nopin_timeout; 728 u32 nopin_response_timeout; 729 u32 random_datain_pdu_offsets; 730 u32 random_datain_seq_offsets; 731 u32 random_r2t_offsets; 732 u32 tmr_cold_reset; 733 u32 tmr_warm_reset; 734 struct iscsi_node_acl *nacl; 735 }; 736 737 struct se_dev_entry_s; 738 739 struct iscsi_node_auth { 740 enum naf_flags_table naf_flags; 741 int authenticate_target; 742 /* Used for iscsit_global->discovery_auth, 743 * set to zero (auth disabled) by default */ 744 int enforce_discovery_auth; 745 #define MAX_USER_LEN 256 746 #define MAX_PASS_LEN 256 747 char userid[MAX_USER_LEN]; 748 char password[MAX_PASS_LEN]; 749 char userid_mutual[MAX_USER_LEN]; 750 char password_mutual[MAX_PASS_LEN]; 751 }; 752 753 #include "iscsi_target_stat.h" 754 755 struct iscsi_node_stat_grps { 756 struct config_group iscsi_sess_stats_group; 757 struct config_group iscsi_conn_stats_group; 758 }; 759 760 struct iscsi_node_acl { 761 struct se_node_acl se_node_acl; 762 struct iscsi_node_attrib node_attrib; 763 struct iscsi_node_auth node_auth; 764 struct iscsi_node_stat_grps node_stat_grps; 765 }; 766 767 struct iscsi_tpg_attrib { 768 u32 authentication; 769 u32 login_timeout; 770 u32 netif_timeout; 771 u32 generate_node_acls; 772 u32 cache_dynamic_acls; 773 u32 default_cmdsn_depth; 774 u32 demo_mode_write_protect; 775 u32 prod_mode_write_protect; 776 u32 demo_mode_discovery; 777 u32 default_erl; 778 u8 t10_pi; 779 u32 fabric_prot_type; 780 u32 tpg_enabled_sendtargets; 781 u32 login_keys_workaround; 782 struct iscsi_portal_group *tpg; 783 }; 784 785 struct iscsi_np { 786 int np_network_transport; 787 int np_ip_proto; 788 int np_sock_type; 789 enum np_thread_state_table np_thread_state; 790 bool enabled; 791 atomic_t np_reset_count; 792 enum iscsi_timer_flags_table np_login_timer_flags; 793 u32 np_exports; 794 enum np_flags_table np_flags; 795 spinlock_t np_thread_lock; 796 struct completion np_restart_comp; 797 struct socket *np_socket; 798 struct sockaddr_storage np_sockaddr; 799 struct task_struct *np_thread; 800 struct timer_list np_login_timer; 801 void *np_context; 802 struct iscsit_transport *np_transport; 803 struct list_head np_list; 804 } ____cacheline_aligned; 805 806 struct iscsi_tpg_np { 807 struct iscsi_np *tpg_np; 808 struct iscsi_portal_group *tpg; 809 struct iscsi_tpg_np *tpg_np_parent; 810 struct list_head tpg_np_list; 811 struct list_head tpg_np_child_list; 812 struct list_head tpg_np_parent_list; 813 struct se_tpg_np se_tpg_np; 814 spinlock_t tpg_np_parent_lock; 815 struct completion tpg_np_comp; 816 struct kref tpg_np_kref; 817 }; 818 819 struct iscsi_portal_group { 820 unsigned char tpg_chap_id; 821 /* TPG State */ 822 enum tpg_state_table tpg_state; 823 /* Target Portal Group Tag */ 824 u16 tpgt; 825 /* Id assigned to target sessions */ 826 u16 ntsih; 827 /* Number of active sessions */ 828 u32 nsessions; 829 /* Number of Network Portals available for this TPG */ 830 u32 num_tpg_nps; 831 /* Per TPG LIO specific session ID. */ 832 u32 sid; 833 /* Spinlock for adding/removing Network Portals */ 834 spinlock_t tpg_np_lock; 835 spinlock_t tpg_state_lock; 836 struct se_portal_group tpg_se_tpg; 837 struct mutex tpg_access_lock; 838 struct semaphore np_login_sem; 839 struct iscsi_tpg_attrib tpg_attrib; 840 struct iscsi_node_auth tpg_demo_auth; 841 /* Pointer to default list of iSCSI parameters for TPG */ 842 struct iscsi_param_list *param_list; 843 struct iscsi_tiqn *tpg_tiqn; 844 struct list_head tpg_gnp_list; 845 struct list_head tpg_list; 846 } ____cacheline_aligned; 847 848 struct iscsi_wwn_stat_grps { 849 struct config_group iscsi_stat_group; 850 struct config_group iscsi_instance_group; 851 struct config_group iscsi_sess_err_group; 852 struct config_group iscsi_tgt_attr_group; 853 struct config_group iscsi_login_stats_group; 854 struct config_group iscsi_logout_stats_group; 855 }; 856 857 struct iscsi_tiqn { 858 #define ISCSI_IQN_LEN 224 859 unsigned char tiqn[ISCSI_IQN_LEN]; 860 enum tiqn_state_table tiqn_state; 861 int tiqn_access_count; 862 u32 tiqn_active_tpgs; 863 u32 tiqn_ntpgs; 864 u32 tiqn_num_tpg_nps; 865 u32 tiqn_nsessions; 866 struct list_head tiqn_list; 867 struct list_head tiqn_tpg_list; 868 spinlock_t tiqn_state_lock; 869 spinlock_t tiqn_tpg_lock; 870 struct se_wwn tiqn_wwn; 871 struct iscsi_wwn_stat_grps tiqn_stat_grps; 872 int tiqn_index; 873 struct iscsi_sess_err_stats sess_err_stats; 874 struct iscsi_login_stats login_stats; 875 struct iscsi_logout_stats logout_stats; 876 } ____cacheline_aligned; 877 878 struct iscsit_global { 879 /* In core shutdown */ 880 u32 in_shutdown; 881 u32 active_ts; 882 /* Unique identifier used for the authentication daemon */ 883 u32 auth_id; 884 u32 inactive_ts; 885 #define ISCSIT_BITMAP_BITS 262144 886 /* Thread Set bitmap pointer */ 887 unsigned long *ts_bitmap; 888 spinlock_t ts_bitmap_lock; 889 /* Used for iSCSI discovery session authentication */ 890 struct iscsi_node_acl discovery_acl; 891 struct iscsi_portal_group *discovery_tpg; 892 }; 893 894 static inline u32 session_get_next_ttt(struct iscsi_session *session) 895 { 896 u32 ttt; 897 898 spin_lock_bh(&session->ttt_lock); 899 ttt = session->targ_xfer_tag++; 900 if (ttt == 0xFFFFFFFF) 901 ttt = session->targ_xfer_tag++; 902 spin_unlock_bh(&session->ttt_lock); 903 904 return ttt; 905 } 906 907 extern struct iscsi_cmd *iscsit_find_cmd_from_itt(struct iscsi_conn *, itt_t); 908 909 static inline void iscsit_thread_check_cpumask( 910 struct iscsi_conn *conn, 911 struct task_struct *p, 912 int mode) 913 { 914 /* 915 * mode == 1 signals iscsi_target_tx_thread() usage. 916 * mode == 0 signals iscsi_target_rx_thread() usage. 917 */ 918 if (mode == 1) { 919 if (!conn->conn_tx_reset_cpumask) 920 return; 921 conn->conn_tx_reset_cpumask = 0; 922 } else { 923 if (!conn->conn_rx_reset_cpumask) 924 return; 925 conn->conn_rx_reset_cpumask = 0; 926 } 927 /* 928 * Update the CPU mask for this single kthread so that 929 * both TX and RX kthreads are scheduled to run on the 930 * same CPU. 931 */ 932 set_cpus_allowed_ptr(p, conn->conn_cpumask); 933 } 934 #endif /* ISCSI_TARGET_CORE_H */ 935