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 #define ISCSI_IQN_LEN 224 29 30 /* struct iscsi_node_attrib sanity values */ 31 #define NA_DATAOUT_TIMEOUT 3 32 #define NA_DATAOUT_TIMEOUT_MAX 60 33 #define NA_DATAOUT_TIMEOUT_MIX 2 34 #define NA_DATAOUT_TIMEOUT_RETRIES 5 35 #define NA_DATAOUT_TIMEOUT_RETRIES_MAX 15 36 #define NA_DATAOUT_TIMEOUT_RETRIES_MIN 1 37 #define NA_NOPIN_TIMEOUT 15 38 #define NA_NOPIN_TIMEOUT_MAX 60 39 #define NA_NOPIN_TIMEOUT_MIN 3 40 #define NA_NOPIN_RESPONSE_TIMEOUT 30 41 #define NA_NOPIN_RESPONSE_TIMEOUT_MAX 60 42 #define NA_NOPIN_RESPONSE_TIMEOUT_MIN 3 43 #define NA_RANDOM_DATAIN_PDU_OFFSETS 0 44 #define NA_RANDOM_DATAIN_SEQ_OFFSETS 0 45 #define NA_RANDOM_R2T_OFFSETS 0 46 47 /* struct iscsi_tpg_attrib sanity values */ 48 #define TA_AUTHENTICATION 1 49 #define TA_LOGIN_TIMEOUT 15 50 #define TA_LOGIN_TIMEOUT_MAX 30 51 #define TA_LOGIN_TIMEOUT_MIN 5 52 #define TA_NETIF_TIMEOUT 2 53 #define TA_NETIF_TIMEOUT_MAX 15 54 #define TA_NETIF_TIMEOUT_MIN 2 55 #define TA_GENERATE_NODE_ACLS 0 56 #define TA_DEFAULT_CMDSN_DEPTH 64 57 #define TA_DEFAULT_CMDSN_DEPTH_MAX 512 58 #define TA_DEFAULT_CMDSN_DEPTH_MIN 1 59 #define TA_CACHE_DYNAMIC_ACLS 0 60 /* Enabled by default in demo mode (generic_node_acls=1) */ 61 #define TA_DEMO_MODE_WRITE_PROTECT 1 62 /* Disabled by default in production mode w/ explict ACLs */ 63 #define TA_PROD_MODE_WRITE_PROTECT 0 64 #define TA_DEMO_MODE_DISCOVERY 1 65 #define TA_DEFAULT_ERL 0 66 #define TA_CACHE_CORE_NPS 0 67 /* T10 protection information disabled by default */ 68 #define TA_DEFAULT_T10_PI 0 69 #define TA_DEFAULT_FABRIC_PROT_TYPE 0 70 /* TPG status needs to be enabled to return sendtargets discovery endpoint info */ 71 #define TA_DEFAULT_TPG_ENABLED_SENDTARGETS 1 72 /* 73 * Used to control the sending of keys with optional to respond state bit, 74 * as a workaround for non RFC compliant initiators,that do not propose, 75 * nor respond to specific keys required for login to complete. 76 * 77 * See iscsi_check_proposer_for_optional_reply() for more details. 78 */ 79 #define TA_DEFAULT_LOGIN_KEYS_WORKAROUND 1 80 81 #define ISCSI_IOV_DATA_BUFFER 5 82 83 enum iscsit_transport_type { 84 ISCSI_TCP = 0, 85 ISCSI_SCTP_TCP = 1, 86 ISCSI_SCTP_UDP = 2, 87 ISCSI_IWARP_TCP = 3, 88 ISCSI_IWARP_SCTP = 4, 89 ISCSI_INFINIBAND = 5, 90 ISCSI_CXGBIT = 6, 91 }; 92 93 /* RFC-3720 7.1.4 Standard Connection State Diagram for a Target */ 94 enum target_conn_state_table { 95 TARG_CONN_STATE_FREE = 0x1, 96 TARG_CONN_STATE_XPT_UP = 0x3, 97 TARG_CONN_STATE_IN_LOGIN = 0x4, 98 TARG_CONN_STATE_LOGGED_IN = 0x5, 99 TARG_CONN_STATE_IN_LOGOUT = 0x6, 100 TARG_CONN_STATE_LOGOUT_REQUESTED = 0x7, 101 TARG_CONN_STATE_CLEANUP_WAIT = 0x8, 102 }; 103 104 /* RFC-3720 7.3.2 Session State Diagram for a Target */ 105 enum target_sess_state_table { 106 TARG_SESS_STATE_FREE = 0x1, 107 TARG_SESS_STATE_ACTIVE = 0x2, 108 TARG_SESS_STATE_LOGGED_IN = 0x3, 109 TARG_SESS_STATE_FAILED = 0x4, 110 TARG_SESS_STATE_IN_CONTINUE = 0x5, 111 }; 112 113 /* struct iscsi_data_count->type */ 114 enum data_count_type { 115 ISCSI_RX_DATA = 1, 116 ISCSI_TX_DATA = 2, 117 }; 118 119 /* struct iscsi_datain_req->dr_complete */ 120 enum datain_req_comp_table { 121 DATAIN_COMPLETE_NORMAL = 1, 122 DATAIN_COMPLETE_WITHIN_COMMAND_RECOVERY = 2, 123 DATAIN_COMPLETE_CONNECTION_RECOVERY = 3, 124 }; 125 126 /* struct iscsi_datain_req->recovery */ 127 enum datain_req_rec_table { 128 DATAIN_WITHIN_COMMAND_RECOVERY = 1, 129 DATAIN_CONNECTION_RECOVERY = 2, 130 }; 131 132 /* struct iscsi_portal_group->state */ 133 enum tpg_state_table { 134 TPG_STATE_FREE = 0, 135 TPG_STATE_ACTIVE = 1, 136 TPG_STATE_INACTIVE = 2, 137 TPG_STATE_COLD_RESET = 3, 138 }; 139 140 /* struct iscsi_tiqn->tiqn_state */ 141 enum tiqn_state_table { 142 TIQN_STATE_ACTIVE = 1, 143 TIQN_STATE_SHUTDOWN = 2, 144 }; 145 146 /* struct iscsi_cmd->cmd_flags */ 147 enum cmd_flags_table { 148 ICF_GOT_LAST_DATAOUT = 0x00000001, 149 ICF_GOT_DATACK_SNACK = 0x00000002, 150 ICF_NON_IMMEDIATE_UNSOLICITED_DATA = 0x00000004, 151 ICF_SENT_LAST_R2T = 0x00000008, 152 ICF_WITHIN_COMMAND_RECOVERY = 0x00000010, 153 ICF_CONTIG_MEMORY = 0x00000020, 154 ICF_ATTACHED_TO_RQUEUE = 0x00000040, 155 ICF_OOO_CMDSN = 0x00000080, 156 ICF_SENDTARGETS_ALL = 0x00000100, 157 ICF_SENDTARGETS_SINGLE = 0x00000200, 158 }; 159 160 /* struct iscsi_cmd->i_state */ 161 enum cmd_i_state_table { 162 ISTATE_NO_STATE = 0, 163 ISTATE_NEW_CMD = 1, 164 ISTATE_DEFERRED_CMD = 2, 165 ISTATE_UNSOLICITED_DATA = 3, 166 ISTATE_RECEIVE_DATAOUT = 4, 167 ISTATE_RECEIVE_DATAOUT_RECOVERY = 5, 168 ISTATE_RECEIVED_LAST_DATAOUT = 6, 169 ISTATE_WITHIN_DATAOUT_RECOVERY = 7, 170 ISTATE_IN_CONNECTION_RECOVERY = 8, 171 ISTATE_RECEIVED_TASKMGT = 9, 172 ISTATE_SEND_ASYNCMSG = 10, 173 ISTATE_SENT_ASYNCMSG = 11, 174 ISTATE_SEND_DATAIN = 12, 175 ISTATE_SEND_LAST_DATAIN = 13, 176 ISTATE_SENT_LAST_DATAIN = 14, 177 ISTATE_SEND_LOGOUTRSP = 15, 178 ISTATE_SENT_LOGOUTRSP = 16, 179 ISTATE_SEND_NOPIN = 17, 180 ISTATE_SENT_NOPIN = 18, 181 ISTATE_SEND_REJECT = 19, 182 ISTATE_SENT_REJECT = 20, 183 ISTATE_SEND_R2T = 21, 184 ISTATE_SENT_R2T = 22, 185 ISTATE_SEND_R2T_RECOVERY = 23, 186 ISTATE_SENT_R2T_RECOVERY = 24, 187 ISTATE_SEND_LAST_R2T = 25, 188 ISTATE_SENT_LAST_R2T = 26, 189 ISTATE_SEND_LAST_R2T_RECOVERY = 27, 190 ISTATE_SENT_LAST_R2T_RECOVERY = 28, 191 ISTATE_SEND_STATUS = 29, 192 ISTATE_SEND_STATUS_BROKEN_PC = 30, 193 ISTATE_SENT_STATUS = 31, 194 ISTATE_SEND_STATUS_RECOVERY = 32, 195 ISTATE_SENT_STATUS_RECOVERY = 33, 196 ISTATE_SEND_TASKMGTRSP = 34, 197 ISTATE_SENT_TASKMGTRSP = 35, 198 ISTATE_SEND_TEXTRSP = 36, 199 ISTATE_SENT_TEXTRSP = 37, 200 ISTATE_SEND_NOPIN_WANT_RESPONSE = 38, 201 ISTATE_SENT_NOPIN_WANT_RESPONSE = 39, 202 ISTATE_SEND_NOPIN_NO_RESPONSE = 40, 203 ISTATE_REMOVE = 41, 204 ISTATE_FREE = 42, 205 }; 206 207 /* Used for iscsi_recover_cmdsn() return values */ 208 enum recover_cmdsn_ret_table { 209 CMDSN_ERROR_CANNOT_RECOVER = -1, 210 CMDSN_NORMAL_OPERATION = 0, 211 CMDSN_LOWER_THAN_EXP = 1, 212 CMDSN_HIGHER_THAN_EXP = 2, 213 CMDSN_MAXCMDSN_OVERRUN = 3, 214 }; 215 216 /* Used for iscsi_handle_immediate_data() return values */ 217 enum immedate_data_ret_table { 218 IMMEDIATE_DATA_CANNOT_RECOVER = -1, 219 IMMEDIATE_DATA_NORMAL_OPERATION = 0, 220 IMMEDIATE_DATA_ERL1_CRC_FAILURE = 1, 221 }; 222 223 /* Used for iscsi_decide_dataout_action() return values */ 224 enum dataout_action_ret_table { 225 DATAOUT_CANNOT_RECOVER = -1, 226 DATAOUT_NORMAL = 0, 227 DATAOUT_SEND_R2T = 1, 228 DATAOUT_SEND_TO_TRANSPORT = 2, 229 DATAOUT_WITHIN_COMMAND_RECOVERY = 3, 230 }; 231 232 /* Used for struct iscsi_node_auth->naf_flags */ 233 enum naf_flags_table { 234 NAF_USERID_SET = 0x01, 235 NAF_PASSWORD_SET = 0x02, 236 NAF_USERID_IN_SET = 0x04, 237 NAF_PASSWORD_IN_SET = 0x08, 238 }; 239 240 /* Used by various struct timer_list to manage iSCSI specific state */ 241 enum iscsi_timer_flags_table { 242 ISCSI_TF_RUNNING = 0x01, 243 ISCSI_TF_STOP = 0x02, 244 ISCSI_TF_EXPIRED = 0x04, 245 }; 246 247 /* Used for struct iscsi_np->np_flags */ 248 enum np_flags_table { 249 NPF_IP_NETWORK = 0x00, 250 }; 251 252 /* Used for struct iscsi_np->np_thread_state */ 253 enum np_thread_state_table { 254 ISCSI_NP_THREAD_ACTIVE = 1, 255 ISCSI_NP_THREAD_INACTIVE = 2, 256 ISCSI_NP_THREAD_RESET = 3, 257 ISCSI_NP_THREAD_SHUTDOWN = 4, 258 ISCSI_NP_THREAD_EXIT = 5, 259 }; 260 261 struct iscsi_conn_ops { 262 u8 HeaderDigest; /* [0,1] == [None,CRC32C] */ 263 u8 DataDigest; /* [0,1] == [None,CRC32C] */ 264 u32 MaxRecvDataSegmentLength; /* [512..2**24-1] */ 265 u32 MaxXmitDataSegmentLength; /* [512..2**24-1] */ 266 /* 267 * iSER specific connection parameters 268 */ 269 u32 InitiatorRecvDataSegmentLength; /* [512..2**24-1] */ 270 u32 TargetRecvDataSegmentLength; /* [512..2**24-1] */ 271 }; 272 273 struct iscsi_sess_ops { 274 char InitiatorName[ISCSI_IQN_LEN]; 275 char InitiatorAlias[256]; 276 char TargetName[ISCSI_IQN_LEN]; 277 char TargetAlias[256]; 278 char TargetAddress[256]; 279 u16 TargetPortalGroupTag; /* [0..65535] */ 280 u16 MaxConnections; /* [1..65535] */ 281 u8 InitialR2T; /* [0,1] == [No,Yes] */ 282 u8 ImmediateData; /* [0,1] == [No,Yes] */ 283 u32 MaxBurstLength; /* [512..2**24-1] */ 284 u32 FirstBurstLength; /* [512..2**24-1] */ 285 u16 DefaultTime2Wait; /* [0..3600] */ 286 u16 DefaultTime2Retain; /* [0..3600] */ 287 u16 MaxOutstandingR2T; /* [1..65535] */ 288 u8 DataPDUInOrder; /* [0,1] == [No,Yes] */ 289 u8 DataSequenceInOrder; /* [0,1] == [No,Yes] */ 290 u8 ErrorRecoveryLevel; /* [0..2] */ 291 u8 SessionType; /* [0,1] == [Normal,Discovery]*/ 292 /* 293 * iSER specific session parameters 294 */ 295 u8 RDMAExtensions; /* [0,1] == [No,Yes] */ 296 }; 297 298 struct iscsi_queue_req { 299 int state; 300 struct iscsi_cmd *cmd; 301 struct list_head qr_list; 302 }; 303 304 struct iscsi_data_count { 305 int data_length; 306 int sync_and_steering; 307 enum data_count_type type; 308 u32 iov_count; 309 u32 ss_iov_count; 310 u32 ss_marker_count; 311 struct kvec *iov; 312 }; 313 314 struct iscsi_param_list { 315 bool iser; 316 struct list_head param_list; 317 struct list_head extra_response_list; 318 }; 319 320 struct iscsi_datain_req { 321 enum datain_req_comp_table dr_complete; 322 int generate_recovery_values; 323 enum datain_req_rec_table recovery; 324 u32 begrun; 325 u32 runlength; 326 u32 data_length; 327 u32 data_offset; 328 u32 data_sn; 329 u32 next_burst_len; 330 u32 read_data_done; 331 u32 seq_send_order; 332 struct list_head cmd_datain_node; 333 } ____cacheline_aligned; 334 335 struct iscsi_ooo_cmdsn { 336 u16 cid; 337 u32 batch_count; 338 u32 cmdsn; 339 u32 exp_cmdsn; 340 struct iscsi_cmd *cmd; 341 struct list_head ooo_list; 342 } ____cacheline_aligned; 343 344 struct iscsi_datain { 345 u8 flags; 346 u32 data_sn; 347 u32 length; 348 u32 offset; 349 } ____cacheline_aligned; 350 351 struct iscsi_r2t { 352 int seq_complete; 353 int recovery_r2t; 354 int sent_r2t; 355 u32 r2t_sn; 356 u32 offset; 357 u32 targ_xfer_tag; 358 u32 xfer_len; 359 struct list_head r2t_list; 360 } ____cacheline_aligned; 361 362 struct iscsi_cmd { 363 enum iscsi_timer_flags_table dataout_timer_flags; 364 /* DataOUT timeout retries */ 365 u8 dataout_timeout_retries; 366 /* Within command recovery count */ 367 u8 error_recovery_count; 368 /* iSCSI dependent state for out or order CmdSNs */ 369 enum cmd_i_state_table deferred_i_state; 370 /* iSCSI dependent state */ 371 enum cmd_i_state_table i_state; 372 /* Command is an immediate command (ISCSI_OP_IMMEDIATE set) */ 373 u8 immediate_cmd; 374 /* Immediate data present */ 375 u8 immediate_data; 376 /* iSCSI Opcode */ 377 u8 iscsi_opcode; 378 /* iSCSI Response Code */ 379 u8 iscsi_response; 380 /* Logout reason when iscsi_opcode == ISCSI_INIT_LOGOUT_CMND */ 381 u8 logout_reason; 382 /* Logout response code when iscsi_opcode == ISCSI_INIT_LOGOUT_CMND */ 383 u8 logout_response; 384 /* MaxCmdSN has been incremented */ 385 u8 maxcmdsn_inc; 386 /* Immediate Unsolicited Dataout */ 387 u8 unsolicited_data; 388 /* Reject reason code */ 389 u8 reject_reason; 390 /* CID contained in logout PDU when opcode == ISCSI_INIT_LOGOUT_CMND */ 391 u16 logout_cid; 392 /* Command flags */ 393 enum cmd_flags_table cmd_flags; 394 /* Initiator Task Tag assigned from Initiator */ 395 itt_t init_task_tag; 396 /* Target Transfer Tag assigned from Target */ 397 u32 targ_xfer_tag; 398 /* CmdSN assigned from Initiator */ 399 u32 cmd_sn; 400 /* ExpStatSN assigned from Initiator */ 401 u32 exp_stat_sn; 402 /* StatSN assigned to this ITT */ 403 u32 stat_sn; 404 /* DataSN Counter */ 405 u32 data_sn; 406 /* R2TSN Counter */ 407 u32 r2t_sn; 408 /* Last DataSN acknowledged via DataAck SNACK */ 409 u32 acked_data_sn; 410 /* Used for echoing NOPOUT ping data */ 411 u32 buf_ptr_size; 412 /* Used to store DataDigest */ 413 u32 data_crc; 414 /* Counter for MaxOutstandingR2T */ 415 u32 outstanding_r2ts; 416 /* Next R2T Offset when DataSequenceInOrder=Yes */ 417 u32 r2t_offset; 418 /* Iovec current and orig count for iscsi_cmd->iov_data */ 419 u32 iov_data_count; 420 u32 orig_iov_data_count; 421 /* Number of miscellaneous iovecs used for IP stack calls */ 422 u32 iov_misc_count; 423 /* Number of struct iscsi_pdu in struct iscsi_cmd->pdu_list */ 424 u32 pdu_count; 425 /* Next struct iscsi_pdu to send in struct iscsi_cmd->pdu_list */ 426 u32 pdu_send_order; 427 /* Current struct iscsi_pdu in struct iscsi_cmd->pdu_list */ 428 u32 pdu_start; 429 /* Next struct iscsi_seq to send in struct iscsi_cmd->seq_list */ 430 u32 seq_send_order; 431 /* Number of struct iscsi_seq in struct iscsi_cmd->seq_list */ 432 u32 seq_count; 433 /* Current struct iscsi_seq in struct iscsi_cmd->seq_list */ 434 u32 seq_no; 435 /* Lowest offset in current DataOUT sequence */ 436 u32 seq_start_offset; 437 /* Highest offset in current DataOUT sequence */ 438 u32 seq_end_offset; 439 /* Total size in bytes received so far of READ data */ 440 u32 read_data_done; 441 /* Total size in bytes received so far of WRITE data */ 442 u32 write_data_done; 443 /* Counter for FirstBurstLength key */ 444 u32 first_burst_len; 445 /* Counter for MaxBurstLength key */ 446 u32 next_burst_len; 447 /* Transfer size used for IP stack calls */ 448 u32 tx_size; 449 /* Buffer used for various purposes */ 450 void *buf_ptr; 451 /* Used by SendTargets=[iqn.,eui.] discovery */ 452 void *text_in_ptr; 453 /* See include/linux/dma-mapping.h */ 454 enum dma_data_direction data_direction; 455 /* iSCSI PDU Header + CRC */ 456 unsigned char pdu[ISCSI_HDR_LEN + ISCSI_CRC_LEN]; 457 /* Number of times struct iscsi_cmd is present in immediate queue */ 458 atomic_t immed_queue_count; 459 atomic_t response_queue_count; 460 spinlock_t datain_lock; 461 spinlock_t dataout_timeout_lock; 462 /* spinlock for protecting struct iscsi_cmd->i_state */ 463 spinlock_t istate_lock; 464 /* spinlock for adding within command recovery entries */ 465 spinlock_t error_lock; 466 /* spinlock for adding R2Ts */ 467 spinlock_t r2t_lock; 468 /* DataIN List */ 469 struct list_head datain_list; 470 /* R2T List */ 471 struct list_head cmd_r2t_list; 472 /* Timer for DataOUT */ 473 struct timer_list dataout_timer; 474 /* Iovecs for SCSI data payload RX/TX w/ kernel level sockets */ 475 struct kvec *iov_data; 476 void *overflow_buf; 477 /* Iovecs for miscellaneous purposes */ 478 #define ISCSI_MISC_IOVECS 5 479 struct kvec iov_misc[ISCSI_MISC_IOVECS]; 480 /* Array of struct iscsi_pdu used for DataPDUInOrder=No */ 481 struct iscsi_pdu *pdu_list; 482 /* Current struct iscsi_pdu used for DataPDUInOrder=No */ 483 struct iscsi_pdu *pdu_ptr; 484 /* Array of struct iscsi_seq used for DataSequenceInOrder=No */ 485 struct iscsi_seq *seq_list; 486 /* Current struct iscsi_seq used for DataSequenceInOrder=No */ 487 struct iscsi_seq *seq_ptr; 488 /* TMR Request when iscsi_opcode == ISCSI_OP_SCSI_TMFUNC */ 489 struct iscsi_tmr_req *tmr_req; 490 /* Connection this command is alligient to */ 491 struct iscsi_conn *conn; 492 /* Pointer to connection recovery entry */ 493 struct iscsi_conn_recovery *cr; 494 /* Session the command is part of, used for connection recovery */ 495 struct iscsi_session *sess; 496 /* list_head for connection list */ 497 struct list_head i_conn_node; 498 /* The TCM I/O descriptor that is accessed via container_of() */ 499 struct se_cmd se_cmd; 500 /* Sense buffer that will be mapped into outgoing status */ 501 #define ISCSI_SENSE_BUFFER_LEN (TRANSPORT_SENSE_BUFFER + 2) 502 unsigned char sense_buffer[ISCSI_SENSE_BUFFER_LEN]; 503 504 u32 padding; 505 u8 pad_bytes[4]; 506 507 struct scatterlist *first_data_sg; 508 u32 first_data_sg_off; 509 u32 kmapped_nents; 510 sense_reason_t sense_reason; 511 } ____cacheline_aligned; 512 513 struct iscsi_tmr_req { 514 bool task_reassign:1; 515 u32 exp_data_sn; 516 struct iscsi_cmd *ref_cmd; 517 struct iscsi_conn_recovery *conn_recovery; 518 struct se_tmr_req *se_tmr_req; 519 }; 520 521 struct iscsi_conn { 522 wait_queue_head_t queues_wq; 523 /* Authentication Successful for this connection */ 524 u8 auth_complete; 525 /* State connection is currently in */ 526 u8 conn_state; 527 u8 conn_logout_reason; 528 u8 network_transport; 529 enum iscsi_timer_flags_table nopin_timer_flags; 530 enum iscsi_timer_flags_table nopin_response_timer_flags; 531 /* Used to know what thread encountered a transport failure */ 532 u8 which_thread; 533 /* connection id assigned by the Initiator */ 534 u16 cid; 535 /* Remote TCP Port */ 536 u16 login_port; 537 int net_size; 538 int login_family; 539 u32 auth_id; 540 u32 conn_flags; 541 /* Used for iscsi_tx_login_rsp() */ 542 itt_t login_itt; 543 u32 exp_statsn; 544 /* Per connection status sequence number */ 545 u32 stat_sn; 546 struct sockaddr_storage login_sockaddr; 547 struct sockaddr_storage local_sockaddr; 548 int conn_usage_count; 549 int conn_waiting_on_uc; 550 atomic_t check_immediate_queue; 551 atomic_t conn_logout_remove; 552 atomic_t connection_exit; 553 atomic_t connection_recovery; 554 atomic_t connection_reinstatement; 555 atomic_t connection_wait_rcfr; 556 atomic_t sleep_on_conn_wait_comp; 557 atomic_t transport_failed; 558 struct completion conn_post_wait_comp; 559 struct completion conn_wait_comp; 560 struct completion conn_wait_rcfr_comp; 561 struct completion conn_waiting_on_uc_comp; 562 struct completion conn_logout_comp; 563 struct completion tx_half_close_comp; 564 struct completion rx_half_close_comp; 565 /* socket used by this connection */ 566 struct socket *sock; 567 void (*orig_data_ready)(struct sock *); 568 void (*orig_state_change)(struct sock *); 569 #define LOGIN_FLAGS_READ_ACTIVE 1 570 #define LOGIN_FLAGS_CLOSED 2 571 #define LOGIN_FLAGS_READY 4 572 #define LOGIN_FLAGS_INITIAL_PDU 8 573 unsigned long login_flags; 574 struct delayed_work login_work; 575 struct iscsi_login *login; 576 struct timer_list nopin_timer; 577 struct timer_list nopin_response_timer; 578 struct timer_list transport_timer; 579 struct task_struct *login_kworker; 580 /* Spinlock used for add/deleting cmd's from conn_cmd_list */ 581 spinlock_t cmd_lock; 582 spinlock_t conn_usage_lock; 583 spinlock_t immed_queue_lock; 584 spinlock_t nopin_timer_lock; 585 spinlock_t response_queue_lock; 586 spinlock_t state_lock; 587 /* libcrypto RX and TX contexts for crc32c */ 588 struct ahash_request *conn_rx_hash; 589 struct ahash_request *conn_tx_hash; 590 /* Used for scheduling TX and RX connection kthreads */ 591 cpumask_var_t conn_cpumask; 592 unsigned int conn_rx_reset_cpumask:1; 593 unsigned int conn_tx_reset_cpumask:1; 594 /* list_head of struct iscsi_cmd for this connection */ 595 struct list_head conn_cmd_list; 596 struct list_head immed_queue_list; 597 struct list_head response_queue_list; 598 struct iscsi_conn_ops *conn_ops; 599 struct iscsi_login *conn_login; 600 struct iscsit_transport *conn_transport; 601 struct iscsi_param_list *param_list; 602 /* Used for per connection auth state machine */ 603 void *auth_protocol; 604 void *context; 605 struct iscsi_login_thread_s *login_thread; 606 struct iscsi_portal_group *tpg; 607 struct iscsi_tpg_np *tpg_np; 608 /* Pointer to parent session */ 609 struct iscsi_session *sess; 610 int bitmap_id; 611 int rx_thread_active; 612 struct task_struct *rx_thread; 613 struct completion rx_login_comp; 614 int tx_thread_active; 615 struct task_struct *tx_thread; 616 /* list_head for session connection list */ 617 struct list_head conn_list; 618 } ____cacheline_aligned; 619 620 struct iscsi_conn_recovery { 621 u16 cid; 622 u32 cmd_count; 623 u32 maxrecvdatasegmentlength; 624 u32 maxxmitdatasegmentlength; 625 int ready_for_reallegiance; 626 struct list_head conn_recovery_cmd_list; 627 spinlock_t conn_recovery_cmd_lock; 628 struct timer_list time2retain_timer; 629 struct iscsi_session *sess; 630 struct list_head cr_list; 631 } ____cacheline_aligned; 632 633 struct iscsi_session { 634 u8 initiator_vendor; 635 u8 isid[6]; 636 enum iscsi_timer_flags_table time2retain_timer_flags; 637 u8 version_active; 638 u16 cid_called; 639 u16 conn_recovery_count; 640 u16 tsih; 641 /* state session is currently in */ 642 u32 session_state; 643 /* session wide counter: initiator assigned task tag */ 644 itt_t init_task_tag; 645 /* session wide counter: target assigned task tag */ 646 u32 targ_xfer_tag; 647 u32 cmdsn_window; 648 649 /* protects cmdsn values */ 650 struct mutex cmdsn_mutex; 651 /* session wide counter: expected command sequence number */ 652 u32 exp_cmd_sn; 653 /* session wide counter: maximum allowed command sequence number */ 654 atomic_t max_cmd_sn; 655 struct list_head sess_ooo_cmdsn_list; 656 657 /* LIO specific session ID */ 658 u32 sid; 659 char auth_type[8]; 660 /* unique within the target */ 661 int session_index; 662 /* Used for session reference counting */ 663 int session_usage_count; 664 int session_waiting_on_uc; 665 atomic_long_t cmd_pdus; 666 atomic_long_t rsp_pdus; 667 atomic_long_t tx_data_octets; 668 atomic_long_t rx_data_octets; 669 atomic_long_t conn_digest_errors; 670 atomic_long_t conn_timeout_errors; 671 u64 creation_time; 672 /* Number of active connections */ 673 atomic_t nconn; 674 atomic_t session_continuation; 675 atomic_t session_fall_back_to_erl0; 676 atomic_t session_logout; 677 atomic_t session_reinstatement; 678 atomic_t session_stop_active; 679 atomic_t session_close; 680 /* connection list */ 681 struct list_head sess_conn_list; 682 struct list_head cr_active_list; 683 struct list_head cr_inactive_list; 684 spinlock_t conn_lock; 685 spinlock_t cr_a_lock; 686 spinlock_t cr_i_lock; 687 spinlock_t session_usage_lock; 688 spinlock_t ttt_lock; 689 struct completion async_msg_comp; 690 struct completion reinstatement_comp; 691 struct completion session_wait_comp; 692 struct completion session_waiting_on_uc_comp; 693 struct timer_list time2retain_timer; 694 struct iscsi_sess_ops *sess_ops; 695 struct se_session *se_sess; 696 struct iscsi_portal_group *tpg; 697 } ____cacheline_aligned; 698 699 struct iscsi_login { 700 u8 auth_complete; 701 u8 checked_for_existing; 702 u8 current_stage; 703 u8 leading_connection; 704 u8 first_request; 705 u8 version_min; 706 u8 version_max; 707 u8 login_complete; 708 u8 login_failed; 709 bool zero_tsih; 710 char isid[6]; 711 u32 cmd_sn; 712 itt_t init_task_tag; 713 u32 initial_exp_statsn; 714 u32 rsp_length; 715 u16 cid; 716 u16 tsih; 717 char req[ISCSI_HDR_LEN]; 718 char rsp[ISCSI_HDR_LEN]; 719 char *req_buf; 720 char *rsp_buf; 721 struct iscsi_conn *conn; 722 struct iscsi_np *np; 723 } ____cacheline_aligned; 724 725 struct iscsi_node_attrib { 726 u32 dataout_timeout; 727 u32 dataout_timeout_retries; 728 u32 default_erl; 729 u32 nopin_timeout; 730 u32 nopin_response_timeout; 731 u32 random_datain_pdu_offsets; 732 u32 random_datain_seq_offsets; 733 u32 random_r2t_offsets; 734 u32 tmr_cold_reset; 735 u32 tmr_warm_reset; 736 struct iscsi_node_acl *nacl; 737 }; 738 739 struct se_dev_entry_s; 740 741 struct iscsi_node_auth { 742 enum naf_flags_table naf_flags; 743 int authenticate_target; 744 /* Used for iscsit_global->discovery_auth, 745 * set to zero (auth disabled) by default */ 746 int enforce_discovery_auth; 747 #define MAX_USER_LEN 256 748 #define MAX_PASS_LEN 256 749 char userid[MAX_USER_LEN]; 750 char password[MAX_PASS_LEN]; 751 char userid_mutual[MAX_USER_LEN]; 752 char password_mutual[MAX_PASS_LEN]; 753 }; 754 755 #include "iscsi_target_stat.h" 756 757 struct iscsi_node_stat_grps { 758 struct config_group iscsi_sess_stats_group; 759 struct config_group iscsi_conn_stats_group; 760 }; 761 762 struct iscsi_node_acl { 763 struct se_node_acl se_node_acl; 764 struct iscsi_node_attrib node_attrib; 765 struct iscsi_node_auth node_auth; 766 struct iscsi_node_stat_grps node_stat_grps; 767 }; 768 769 struct iscsi_tpg_attrib { 770 u32 authentication; 771 u32 login_timeout; 772 u32 netif_timeout; 773 u32 generate_node_acls; 774 u32 cache_dynamic_acls; 775 u32 default_cmdsn_depth; 776 u32 demo_mode_write_protect; 777 u32 prod_mode_write_protect; 778 u32 demo_mode_discovery; 779 u32 default_erl; 780 u8 t10_pi; 781 u32 fabric_prot_type; 782 u32 tpg_enabled_sendtargets; 783 u32 login_keys_workaround; 784 struct iscsi_portal_group *tpg; 785 }; 786 787 struct iscsi_np { 788 int np_network_transport; 789 int np_ip_proto; 790 int np_sock_type; 791 enum np_thread_state_table np_thread_state; 792 bool enabled; 793 atomic_t np_reset_count; 794 enum iscsi_timer_flags_table np_login_timer_flags; 795 u32 np_exports; 796 enum np_flags_table np_flags; 797 spinlock_t np_thread_lock; 798 struct completion np_restart_comp; 799 struct socket *np_socket; 800 struct sockaddr_storage np_sockaddr; 801 struct task_struct *np_thread; 802 struct timer_list np_login_timer; 803 void *np_context; 804 struct iscsit_transport *np_transport; 805 struct list_head np_list; 806 } ____cacheline_aligned; 807 808 struct iscsi_tpg_np { 809 struct iscsi_np *tpg_np; 810 struct iscsi_portal_group *tpg; 811 struct iscsi_tpg_np *tpg_np_parent; 812 struct list_head tpg_np_list; 813 struct list_head tpg_np_child_list; 814 struct list_head tpg_np_parent_list; 815 struct se_tpg_np se_tpg_np; 816 spinlock_t tpg_np_parent_lock; 817 struct completion tpg_np_comp; 818 struct kref tpg_np_kref; 819 }; 820 821 struct iscsi_portal_group { 822 unsigned char tpg_chap_id; 823 /* TPG State */ 824 enum tpg_state_table tpg_state; 825 /* Target Portal Group Tag */ 826 u16 tpgt; 827 /* Id assigned to target sessions */ 828 u16 ntsih; 829 /* Number of active sessions */ 830 u32 nsessions; 831 /* Number of Network Portals available for this TPG */ 832 u32 num_tpg_nps; 833 /* Per TPG LIO specific session ID. */ 834 u32 sid; 835 /* Spinlock for adding/removing Network Portals */ 836 spinlock_t tpg_np_lock; 837 spinlock_t tpg_state_lock; 838 struct se_portal_group tpg_se_tpg; 839 struct mutex tpg_access_lock; 840 struct semaphore np_login_sem; 841 struct iscsi_tpg_attrib tpg_attrib; 842 struct iscsi_node_auth tpg_demo_auth; 843 /* Pointer to default list of iSCSI parameters for TPG */ 844 struct iscsi_param_list *param_list; 845 struct iscsi_tiqn *tpg_tiqn; 846 struct list_head tpg_gnp_list; 847 struct list_head tpg_list; 848 } ____cacheline_aligned; 849 850 struct iscsi_wwn_stat_grps { 851 struct config_group iscsi_stat_group; 852 struct config_group iscsi_instance_group; 853 struct config_group iscsi_sess_err_group; 854 struct config_group iscsi_tgt_attr_group; 855 struct config_group iscsi_login_stats_group; 856 struct config_group iscsi_logout_stats_group; 857 }; 858 859 struct iscsi_tiqn { 860 unsigned char tiqn[ISCSI_IQN_LEN]; 861 enum tiqn_state_table tiqn_state; 862 int tiqn_access_count; 863 u32 tiqn_active_tpgs; 864 u32 tiqn_ntpgs; 865 u32 tiqn_num_tpg_nps; 866 u32 tiqn_nsessions; 867 struct list_head tiqn_list; 868 struct list_head tiqn_tpg_list; 869 spinlock_t tiqn_state_lock; 870 spinlock_t tiqn_tpg_lock; 871 struct se_wwn tiqn_wwn; 872 struct iscsi_wwn_stat_grps tiqn_stat_grps; 873 int tiqn_index; 874 struct iscsi_sess_err_stats sess_err_stats; 875 struct iscsi_login_stats login_stats; 876 struct iscsi_logout_stats logout_stats; 877 } ____cacheline_aligned; 878 879 struct iscsit_global { 880 /* In core shutdown */ 881 u32 in_shutdown; 882 u32 active_ts; 883 /* Unique identifier used for the authentication daemon */ 884 u32 auth_id; 885 u32 inactive_ts; 886 #define ISCSIT_BITMAP_BITS 262144 887 /* Thread Set bitmap pointer */ 888 unsigned long *ts_bitmap; 889 spinlock_t ts_bitmap_lock; 890 /* Used for iSCSI discovery session authentication */ 891 struct iscsi_node_acl discovery_acl; 892 struct iscsi_portal_group *discovery_tpg; 893 }; 894 895 static inline u32 session_get_next_ttt(struct iscsi_session *session) 896 { 897 u32 ttt; 898 899 spin_lock_bh(&session->ttt_lock); 900 ttt = session->targ_xfer_tag++; 901 if (ttt == 0xFFFFFFFF) 902 ttt = session->targ_xfer_tag++; 903 spin_unlock_bh(&session->ttt_lock); 904 905 return ttt; 906 } 907 908 extern struct iscsi_cmd *iscsit_find_cmd_from_itt(struct iscsi_conn *, itt_t); 909 910 static inline void iscsit_thread_check_cpumask( 911 struct iscsi_conn *conn, 912 struct task_struct *p, 913 int mode) 914 { 915 /* 916 * mode == 1 signals iscsi_target_tx_thread() usage. 917 * mode == 0 signals iscsi_target_rx_thread() usage. 918 */ 919 if (mode == 1) { 920 if (!conn->conn_tx_reset_cpumask) 921 return; 922 conn->conn_tx_reset_cpumask = 0; 923 } else { 924 if (!conn->conn_rx_reset_cpumask) 925 return; 926 conn->conn_rx_reset_cpumask = 0; 927 } 928 /* 929 * Update the CPU mask for this single kthread so that 930 * both TX and RX kthreads are scheduled to run on the 931 * same CPU. 932 */ 933 set_cpus_allowed_ptr(p, conn->conn_cpumask); 934 } 935 #endif /* ISCSI_TARGET_CORE_H */ 936