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1/* SPDX-License-Identifier: GPL-2.0 */2#ifndef ISCSI_TARGET_CORE_H3#define ISCSI_TARGET_CORE_H4 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 13struct sock;14 15#define ISCSIT_VERSION "v4.1.0"16#define ISCSI_MAX_DATASN_MISSING_COUNT 1617#define ISCSI_TX_THREAD_TCP_TIMEOUT 218#define ISCSI_RX_THREAD_TCP_TIMEOUT 219#define SECONDS_FOR_ASYNC_LOGOUT 1020#define SECONDS_FOR_ASYNC_TEXT 1021#define SECONDS_FOR_LOGOUT_COMP 1522#define WHITE_SPACE " \t\v\f\n\r"23#define ISCSIT_MIN_TAGS 1624#define ISCSIT_EXTRA_TAGS 825#define ISCSIT_TCP_BACKLOG 25626#define ISCSI_RX_THREAD_NAME "iscsi_trx"27#define ISCSI_TX_THREAD_NAME "iscsi_ttx"28#define ISCSI_IQN_LEN 22429#define NA_AUTHENTICATION_INHERITED -130 31/* struct iscsi_node_attrib sanity values */32#define NA_DATAOUT_TIMEOUT 333#define NA_DATAOUT_TIMEOUT_MAX 6034#define NA_DATAOUT_TIMEOUT_MIX 235#define NA_DATAOUT_TIMEOUT_RETRIES 536#define NA_DATAOUT_TIMEOUT_RETRIES_MAX 1537#define NA_DATAOUT_TIMEOUT_RETRIES_MIN 138#define NA_NOPIN_TIMEOUT 1539#define NA_NOPIN_TIMEOUT_MAX 6040#define NA_NOPIN_TIMEOUT_MIN 341#define NA_NOPIN_RESPONSE_TIMEOUT 3042#define NA_NOPIN_RESPONSE_TIMEOUT_MAX 6043#define NA_NOPIN_RESPONSE_TIMEOUT_MIN 344#define NA_RANDOM_DATAIN_PDU_OFFSETS 045#define NA_RANDOM_DATAIN_SEQ_OFFSETS 046#define NA_RANDOM_R2T_OFFSETS 047 48/* struct iscsi_tpg_attrib sanity values */49#define TA_AUTHENTICATION 150#define TA_LOGIN_TIMEOUT 1551#define TA_LOGIN_TIMEOUT_MAX 3052#define TA_LOGIN_TIMEOUT_MIN 553#define TA_GENERATE_NODE_ACLS 054#define TA_DEFAULT_CMDSN_DEPTH 6455#define TA_DEFAULT_CMDSN_DEPTH_MAX 51256#define TA_DEFAULT_CMDSN_DEPTH_MIN 157#define TA_CACHE_DYNAMIC_ACLS 058/* Enabled by default in demo mode (generic_node_acls=1) */59#define TA_DEMO_MODE_WRITE_PROTECT 160/* Disabled by default in production mode w/ explict ACLs */61#define TA_PROD_MODE_WRITE_PROTECT 062#define TA_DEMO_MODE_DISCOVERY 163#define TA_DEFAULT_ERL 064#define TA_CACHE_CORE_NPS 065/* T10 protection information disabled by default */66#define TA_DEFAULT_T10_PI 067#define TA_DEFAULT_FABRIC_PROT_TYPE 068/* TPG status needs to be enabled to return sendtargets discovery endpoint info */69#define TA_DEFAULT_TPG_ENABLED_SENDTARGETS 170/*71 * Used to control the sending of keys with optional to respond state bit,72 * as a workaround for non RFC compliant initiators,that do not propose,73 * nor respond to specific keys required for login to complete.74 *75 * See iscsi_check_proposer_for_optional_reply() for more details.76 */77#define TA_DEFAULT_LOGIN_KEYS_WORKAROUND 178 79#define ISCSI_IOV_DATA_BUFFER 580 81enum iscsit_transport_type {82 ISCSI_TCP = 0,83 ISCSI_SCTP_TCP = 1,84 ISCSI_SCTP_UDP = 2,85 ISCSI_IWARP_TCP = 3,86 ISCSI_IWARP_SCTP = 4,87 ISCSI_INFINIBAND = 5,88 ISCSI_CXGBIT = 6,89};90 91/* RFC-3720 7.1.4 Standard Connection State Diagram for a Target */92enum target_conn_state_table {93 TARG_CONN_STATE_FREE = 0x1,94 TARG_CONN_STATE_XPT_UP = 0x3,95 TARG_CONN_STATE_IN_LOGIN = 0x4,96 TARG_CONN_STATE_LOGGED_IN = 0x5,97 TARG_CONN_STATE_IN_LOGOUT = 0x6,98 TARG_CONN_STATE_LOGOUT_REQUESTED = 0x7,99 TARG_CONN_STATE_CLEANUP_WAIT = 0x8,100};101 102/* RFC-3720 7.3.2 Session State Diagram for a Target */103enum target_sess_state_table {104 TARG_SESS_STATE_FREE = 0x1,105 TARG_SESS_STATE_ACTIVE = 0x2,106 TARG_SESS_STATE_LOGGED_IN = 0x3,107 TARG_SESS_STATE_FAILED = 0x4,108 TARG_SESS_STATE_IN_CONTINUE = 0x5,109};110 111/* struct iscsi_data_count->type */112enum data_count_type {113 ISCSI_RX_DATA = 1,114 ISCSI_TX_DATA = 2,115};116 117/* struct iscsi_datain_req->dr_complete */118enum datain_req_comp_table {119 DATAIN_COMPLETE_NORMAL = 1,120 DATAIN_COMPLETE_WITHIN_COMMAND_RECOVERY = 2,121 DATAIN_COMPLETE_CONNECTION_RECOVERY = 3,122};123 124/* struct iscsi_datain_req->recovery */125enum datain_req_rec_table {126 DATAIN_WITHIN_COMMAND_RECOVERY = 1,127 DATAIN_CONNECTION_RECOVERY = 2,128};129 130/* struct iscsi_portal_group->state */131enum tpg_state_table {132 TPG_STATE_FREE = 0,133 TPG_STATE_ACTIVE = 1,134 TPG_STATE_INACTIVE = 2,135 TPG_STATE_COLD_RESET = 3,136};137 138/* struct iscsi_tiqn->tiqn_state */139enum tiqn_state_table {140 TIQN_STATE_ACTIVE = 1,141 TIQN_STATE_SHUTDOWN = 2,142};143 144/* struct iscsit_cmd->cmd_flags */145enum cmd_flags_table {146 ICF_GOT_LAST_DATAOUT = 0x00000001,147 ICF_GOT_DATACK_SNACK = 0x00000002,148 ICF_NON_IMMEDIATE_UNSOLICITED_DATA = 0x00000004,149 ICF_SENT_LAST_R2T = 0x00000008,150 ICF_WITHIN_COMMAND_RECOVERY = 0x00000010,151 ICF_CONTIG_MEMORY = 0x00000020,152 ICF_ATTACHED_TO_RQUEUE = 0x00000040,153 ICF_OOO_CMDSN = 0x00000080,154 ICF_SENDTARGETS_ALL = 0x00000100,155 ICF_SENDTARGETS_SINGLE = 0x00000200,156};157 158/* struct iscsit_cmd->i_state */159enum cmd_i_state_table {160 ISTATE_NO_STATE = 0,161 ISTATE_NEW_CMD = 1,162 ISTATE_DEFERRED_CMD = 2,163 ISTATE_UNSOLICITED_DATA = 3,164 ISTATE_RECEIVE_DATAOUT = 4,165 ISTATE_RECEIVE_DATAOUT_RECOVERY = 5,166 ISTATE_RECEIVED_LAST_DATAOUT = 6,167 ISTATE_WITHIN_DATAOUT_RECOVERY = 7,168 ISTATE_IN_CONNECTION_RECOVERY = 8,169 ISTATE_RECEIVED_TASKMGT = 9,170 ISTATE_SEND_ASYNCMSG = 10,171 ISTATE_SENT_ASYNCMSG = 11,172 ISTATE_SEND_DATAIN = 12,173 ISTATE_SEND_LAST_DATAIN = 13,174 ISTATE_SENT_LAST_DATAIN = 14,175 ISTATE_SEND_LOGOUTRSP = 15,176 ISTATE_SENT_LOGOUTRSP = 16,177 ISTATE_SEND_NOPIN = 17,178 ISTATE_SENT_NOPIN = 18,179 ISTATE_SEND_REJECT = 19,180 ISTATE_SENT_REJECT = 20,181 ISTATE_SEND_R2T = 21,182 ISTATE_SENT_R2T = 22,183 ISTATE_SEND_R2T_RECOVERY = 23,184 ISTATE_SENT_R2T_RECOVERY = 24,185 ISTATE_SEND_LAST_R2T = 25,186 ISTATE_SENT_LAST_R2T = 26,187 ISTATE_SEND_LAST_R2T_RECOVERY = 27,188 ISTATE_SENT_LAST_R2T_RECOVERY = 28,189 ISTATE_SEND_STATUS = 29,190 ISTATE_SEND_STATUS_BROKEN_PC = 30,191 ISTATE_SENT_STATUS = 31,192 ISTATE_SEND_STATUS_RECOVERY = 32,193 ISTATE_SENT_STATUS_RECOVERY = 33,194 ISTATE_SEND_TASKMGTRSP = 34,195 ISTATE_SENT_TASKMGTRSP = 35,196 ISTATE_SEND_TEXTRSP = 36,197 ISTATE_SENT_TEXTRSP = 37,198 ISTATE_SEND_NOPIN_WANT_RESPONSE = 38,199 ISTATE_SENT_NOPIN_WANT_RESPONSE = 39,200 ISTATE_SEND_NOPIN_NO_RESPONSE = 40,201 ISTATE_REMOVE = 41,202 ISTATE_FREE = 42,203};204 205/* Used for iscsi_recover_cmdsn() return values */206enum recover_cmdsn_ret_table {207 CMDSN_ERROR_CANNOT_RECOVER = -1,208 CMDSN_NORMAL_OPERATION = 0,209 CMDSN_LOWER_THAN_EXP = 1,210 CMDSN_HIGHER_THAN_EXP = 2,211 CMDSN_MAXCMDSN_OVERRUN = 3,212};213 214/* Used for iscsi_handle_immediate_data() return values */215enum immedate_data_ret_table {216 IMMEDIATE_DATA_CANNOT_RECOVER = -1,217 IMMEDIATE_DATA_NORMAL_OPERATION = 0,218 IMMEDIATE_DATA_ERL1_CRC_FAILURE = 1,219};220 221/* Used for iscsi_decide_dataout_action() return values */222enum dataout_action_ret_table {223 DATAOUT_CANNOT_RECOVER = -1,224 DATAOUT_NORMAL = 0,225 DATAOUT_SEND_R2T = 1,226 DATAOUT_SEND_TO_TRANSPORT = 2,227 DATAOUT_WITHIN_COMMAND_RECOVERY = 3,228};229 230/* Used for struct iscsi_node_auth->naf_flags */231enum naf_flags_table {232 NAF_USERID_SET = 0x01,233 NAF_PASSWORD_SET = 0x02,234 NAF_USERID_IN_SET = 0x04,235 NAF_PASSWORD_IN_SET = 0x08,236};237 238/* Used by various struct timer_list to manage iSCSI specific state */239enum iscsi_timer_flags_table {240 ISCSI_TF_RUNNING = 0x01,241 ISCSI_TF_STOP = 0x02,242 ISCSI_TF_EXPIRED = 0x04,243};244 245/* Used for struct iscsi_np->np_flags */246enum np_flags_table {247 NPF_IP_NETWORK = 0x00,248};249 250/* Used for struct iscsi_np->np_thread_state */251enum np_thread_state_table {252 ISCSI_NP_THREAD_ACTIVE = 1,253 ISCSI_NP_THREAD_INACTIVE = 2,254 ISCSI_NP_THREAD_RESET = 3,255 ISCSI_NP_THREAD_SHUTDOWN = 4,256 ISCSI_NP_THREAD_EXIT = 5,257};258 259struct iscsi_conn_ops {260 u8 HeaderDigest; /* [0,1] == [None,CRC32C] */261 u8 DataDigest; /* [0,1] == [None,CRC32C] */262 u32 MaxRecvDataSegmentLength; /* [512..2**24-1] */263 u32 MaxXmitDataSegmentLength; /* [512..2**24-1] */264 /*265 * iSER specific connection parameters266 */267 u32 InitiatorRecvDataSegmentLength; /* [512..2**24-1] */268 u32 TargetRecvDataSegmentLength; /* [512..2**24-1] */269};270 271struct iscsi_sess_ops {272 char InitiatorName[ISCSI_IQN_LEN];273 char InitiatorAlias[256];274 char TargetName[ISCSI_IQN_LEN];275 char TargetAlias[256];276 char TargetAddress[256];277 u16 TargetPortalGroupTag; /* [0..65535] */278 u16 MaxConnections; /* [1..65535] */279 u8 InitialR2T; /* [0,1] == [No,Yes] */280 u8 ImmediateData; /* [0,1] == [No,Yes] */281 u32 MaxBurstLength; /* [512..2**24-1] */282 u32 FirstBurstLength; /* [512..2**24-1] */283 u16 DefaultTime2Wait; /* [0..3600] */284 u16 DefaultTime2Retain; /* [0..3600] */285 u16 MaxOutstandingR2T; /* [1..65535] */286 u8 DataPDUInOrder; /* [0,1] == [No,Yes] */287 u8 DataSequenceInOrder; /* [0,1] == [No,Yes] */288 u8 ErrorRecoveryLevel; /* [0..2] */289 u8 SessionType; /* [0,1] == [Normal,Discovery]*/290 /*291 * iSER specific session parameters292 */293 u8 RDMAExtensions; /* [0,1] == [No,Yes] */294};295 296struct iscsi_queue_req {297 int state;298 struct iscsit_cmd *cmd;299 struct list_head qr_list;300};301 302struct iscsi_param_list {303 bool iser;304 struct list_head param_list;305 struct list_head extra_response_list;306};307 308struct iscsi_datain_req {309 enum datain_req_comp_table dr_complete;310 int generate_recovery_values;311 enum datain_req_rec_table recovery;312 u32 begrun;313 u32 runlength;314 u32 data_length;315 u32 data_offset;316 u32 data_sn;317 u32 next_burst_len;318 u32 read_data_done;319 u32 seq_send_order;320 struct list_head cmd_datain_node;321} ____cacheline_aligned;322 323struct iscsi_ooo_cmdsn {324 u16 cid;325 u32 batch_count;326 u32 cmdsn;327 u32 exp_cmdsn;328 struct iscsit_cmd *cmd;329 struct list_head ooo_list;330} ____cacheline_aligned;331 332struct iscsi_datain {333 u8 flags;334 u32 data_sn;335 u32 length;336 u32 offset;337} ____cacheline_aligned;338 339struct iscsi_r2t {340 int seq_complete;341 int recovery_r2t;342 int sent_r2t;343 u32 r2t_sn;344 u32 offset;345 u32 targ_xfer_tag;346 u32 xfer_len;347 struct list_head r2t_list;348} ____cacheline_aligned;349 350struct iscsit_cmd {351 enum iscsi_timer_flags_table dataout_timer_flags;352 /* DataOUT timeout retries */353 u8 dataout_timeout_retries;354 /* Within command recovery count */355 u8 error_recovery_count;356 /* iSCSI dependent state for out or order CmdSNs */357 enum cmd_i_state_table deferred_i_state;358 /* iSCSI dependent state */359 enum cmd_i_state_table i_state;360 /* Command is an immediate command (ISCSI_OP_IMMEDIATE set) */361 u8 immediate_cmd;362 /* Immediate data present */363 u8 immediate_data;364 /* iSCSI Opcode */365 u8 iscsi_opcode;366 /* iSCSI Response Code */367 u8 iscsi_response;368 /* Logout reason when iscsi_opcode == ISCSI_INIT_LOGOUT_CMND */369 u8 logout_reason;370 /* Logout response code when iscsi_opcode == ISCSI_INIT_LOGOUT_CMND */371 u8 logout_response;372 /* MaxCmdSN has been incremented */373 u8 maxcmdsn_inc;374 /* Immediate Unsolicited Dataout */375 u8 unsolicited_data;376 /* Reject reason code */377 u8 reject_reason;378 /* CID contained in logout PDU when opcode == ISCSI_INIT_LOGOUT_CMND */379 u16 logout_cid;380 /* Command flags */381 enum cmd_flags_table cmd_flags;382 /* Initiator Task Tag assigned from Initiator */383 itt_t init_task_tag;384 /* Target Transfer Tag assigned from Target */385 u32 targ_xfer_tag;386 /* CmdSN assigned from Initiator */387 u32 cmd_sn;388 /* ExpStatSN assigned from Initiator */389 u32 exp_stat_sn;390 /* StatSN assigned to this ITT */391 u32 stat_sn;392 /* DataSN Counter */393 u32 data_sn;394 /* R2TSN Counter */395 u32 r2t_sn;396 /* Last DataSN acknowledged via DataAck SNACK */397 u32 acked_data_sn;398 /* Used for echoing NOPOUT ping data */399 u32 buf_ptr_size;400 /* Used to store DataDigest */401 u32 data_crc;402 /* Counter for MaxOutstandingR2T */403 u32 outstanding_r2ts;404 /* Next R2T Offset when DataSequenceInOrder=Yes */405 u32 r2t_offset;406 /* Iovec current and orig count for iscsit_cmd->iov_data */407 u32 iov_data_count;408 u32 orig_iov_data_count;409 /* Number of miscellaneous iovecs used for IP stack calls */410 u32 iov_misc_count;411 /* Number of struct iscsi_pdu in struct iscsit_cmd->pdu_list */412 u32 pdu_count;413 /* Next struct iscsi_pdu to send in struct iscsit_cmd->pdu_list */414 u32 pdu_send_order;415 /* Current struct iscsi_pdu in struct iscsit_cmd->pdu_list */416 u32 pdu_start;417 /* Next struct iscsi_seq to send in struct iscsit_cmd->seq_list */418 u32 seq_send_order;419 /* Number of struct iscsi_seq in struct iscsit_cmd->seq_list */420 u32 seq_count;421 /* Current struct iscsi_seq in struct iscsit_cmd->seq_list */422 u32 seq_no;423 /* Lowest offset in current DataOUT sequence */424 u32 seq_start_offset;425 /* Highest offset in current DataOUT sequence */426 u32 seq_end_offset;427 /* Total size in bytes received so far of READ data */428 u32 read_data_done;429 /* Total size in bytes received so far of WRITE data */430 u32 write_data_done;431 /* Counter for FirstBurstLength key */432 u32 first_burst_len;433 /* Counter for MaxBurstLength key */434 u32 next_burst_len;435 /* Transfer size used for IP stack calls */436 u32 tx_size;437 /* Buffer used for various purposes */438 void *buf_ptr;439 /* Used by SendTargets=[iqn.,eui.] discovery */440 void *text_in_ptr;441 /* See include/linux/dma-mapping.h */442 enum dma_data_direction data_direction;443 /* iSCSI PDU Header + CRC */444 unsigned char pdu[ISCSI_HDR_LEN + ISCSI_CRC_LEN];445 /* Number of times struct iscsit_cmd is present in immediate queue */446 atomic_t immed_queue_count;447 atomic_t response_queue_count;448 spinlock_t datain_lock;449 spinlock_t dataout_timeout_lock;450 /* spinlock for protecting struct iscsit_cmd->i_state */451 spinlock_t istate_lock;452 /* spinlock for adding within command recovery entries */453 spinlock_t error_lock;454 /* spinlock for adding R2Ts */455 spinlock_t r2t_lock;456 /* DataIN List */457 struct list_head datain_list;458 /* R2T List */459 struct list_head cmd_r2t_list;460 /* Timer for DataOUT */461 struct timer_list dataout_timer;462 /* Iovecs for SCSI data payload RX/TX w/ kernel level sockets */463 struct kvec *iov_data;464 void *overflow_buf;465 /* Iovecs for miscellaneous purposes */466#define ISCSI_MISC_IOVECS 5467 struct kvec iov_misc[ISCSI_MISC_IOVECS];468 /* Array of struct iscsi_pdu used for DataPDUInOrder=No */469 struct iscsi_pdu *pdu_list;470 /* Current struct iscsi_pdu used for DataPDUInOrder=No */471 struct iscsi_pdu *pdu_ptr;472 /* Array of struct iscsi_seq used for DataSequenceInOrder=No */473 struct iscsi_seq *seq_list;474 /* Current struct iscsi_seq used for DataSequenceInOrder=No */475 struct iscsi_seq *seq_ptr;476 /* TMR Request when iscsi_opcode == ISCSI_OP_SCSI_TMFUNC */477 struct iscsi_tmr_req *tmr_req;478 /* Connection this command is alligient to */479 struct iscsit_conn *conn;480 /* Pointer to connection recovery entry */481 struct iscsi_conn_recovery *cr;482 /* Session the command is part of, used for connection recovery */483 struct iscsit_session *sess;484 /* list_head for connection list */485 struct list_head i_conn_node;486 /* The TCM I/O descriptor that is accessed via container_of() */487 struct se_cmd se_cmd;488 /* Sense buffer that will be mapped into outgoing status */489#define ISCSI_SENSE_BUFFER_LEN (TRANSPORT_SENSE_BUFFER + 2)490 unsigned char sense_buffer[ISCSI_SENSE_BUFFER_LEN];491 492 u32 padding;493 u8 pad_bytes[4];494 495 struct scatterlist *first_data_sg;496 u32 first_data_sg_off;497 u32 kmapped_nents;498 sense_reason_t sense_reason;499} ____cacheline_aligned;500 501struct iscsi_tmr_req {502 bool task_reassign:1;503 u32 exp_data_sn;504 struct iscsit_cmd *ref_cmd;505 struct iscsi_conn_recovery *conn_recovery;506 struct se_tmr_req *se_tmr_req;507};508 509struct iscsit_conn {510 wait_queue_head_t queues_wq;511 /* Authentication Successful for this connection */512 u8 auth_complete;513 /* State connection is currently in */514 u8 conn_state;515 u8 conn_logout_reason;516 u8 network_transport;517 enum iscsi_timer_flags_table nopin_timer_flags;518 enum iscsi_timer_flags_table nopin_response_timer_flags;519 /* Used to know what thread encountered a transport failure */520 u8 which_thread;521 /* connection id assigned by the Initiator */522 u16 cid;523 /* Remote TCP Port */524 u16 login_port;525 int net_size;526 int login_family;527 u32 auth_id;528 u32 conn_flags;529 /* Used for iscsi_tx_login_rsp() */530 itt_t login_itt;531 u32 exp_statsn;532 /* Per connection status sequence number */533 u32 stat_sn;534 struct sockaddr_storage login_sockaddr;535 struct sockaddr_storage local_sockaddr;536 int conn_usage_count;537 int conn_waiting_on_uc;538 atomic_t check_immediate_queue;539 atomic_t conn_logout_remove;540 atomic_t connection_exit;541 atomic_t connection_recovery;542 atomic_t connection_reinstatement;543 atomic_t connection_wait_rcfr;544 atomic_t sleep_on_conn_wait_comp;545 atomic_t transport_failed;546 struct completion conn_post_wait_comp;547 struct completion conn_wait_comp;548 struct completion conn_wait_rcfr_comp;549 struct completion conn_waiting_on_uc_comp;550 struct completion conn_logout_comp;551 struct completion tx_half_close_comp;552 struct completion rx_half_close_comp;553 /* socket used by this connection */554 struct socket *sock;555 void (*orig_data_ready)(struct sock *);556 void (*orig_state_change)(struct sock *);557#define LOGIN_FLAGS_READY 0558#define LOGIN_FLAGS_INITIAL_PDU 1559#define LOGIN_FLAGS_READ_ACTIVE 2560#define LOGIN_FLAGS_WRITE_ACTIVE 3561#define LOGIN_FLAGS_CLOSED 4562#define LOGIN_FLAGS_WORKER_RUNNING 5563 unsigned long login_flags;564 struct delayed_work login_work;565 struct iscsi_login *login;566 struct timer_list nopin_timer;567 struct timer_list nopin_response_timer;568 struct timer_list login_timer;569 struct task_struct *login_kworker;570 /* Spinlock used for add/deleting cmd's from conn_cmd_list */571 spinlock_t cmd_lock;572 spinlock_t conn_usage_lock;573 spinlock_t immed_queue_lock;574 spinlock_t nopin_timer_lock;575 spinlock_t response_queue_lock;576 spinlock_t state_lock;577 spinlock_t login_timer_lock;578 spinlock_t login_worker_lock;579 /* libcrypto RX and TX contexts for crc32c */580 struct ahash_request *conn_rx_hash;581 struct ahash_request *conn_tx_hash;582 /* Used for scheduling TX and RX connection kthreads */583 cpumask_var_t conn_cpumask;584 cpumask_var_t allowed_cpumask;585 unsigned int conn_rx_reset_cpumask:1;586 unsigned int conn_tx_reset_cpumask:1;587 /* list_head of struct iscsit_cmd for this connection */588 struct list_head conn_cmd_list;589 struct list_head immed_queue_list;590 struct list_head response_queue_list;591 struct iscsi_conn_ops *conn_ops;592 struct iscsi_login *conn_login;593 struct iscsit_transport *conn_transport;594 struct iscsi_param_list *param_list;595 /* Used for per connection auth state machine */596 void *auth_protocol;597 void *context;598 struct iscsi_login_thread_s *login_thread;599 struct iscsi_portal_group *tpg;600 struct iscsi_tpg_np *tpg_np;601 /* Pointer to parent session */602 struct iscsit_session *sess;603 struct target_cmd_counter *cmd_cnt;604 int bitmap_id;605 int rx_thread_active;606 struct task_struct *rx_thread;607 struct completion rx_login_comp;608 int tx_thread_active;609 struct task_struct *tx_thread;610 /* list_head for session connection list */611 struct list_head conn_list;612} ____cacheline_aligned;613 614struct iscsi_conn_recovery {615 u16 cid;616 u32 cmd_count;617 u32 maxrecvdatasegmentlength;618 u32 maxxmitdatasegmentlength;619 int ready_for_reallegiance;620 struct list_head conn_recovery_cmd_list;621 spinlock_t conn_recovery_cmd_lock;622 struct timer_list time2retain_timer;623 struct iscsit_session *sess;624 struct list_head cr_list;625} ____cacheline_aligned;626 627struct iscsit_session {628 u8 initiator_vendor;629 u8 isid[6];630 enum iscsi_timer_flags_table time2retain_timer_flags;631 u8 version_active;632 u16 cid_called;633 u16 conn_recovery_count;634 u16 tsih;635 /* state session is currently in */636 u32 session_state;637 /* session wide counter: initiator assigned task tag */638 itt_t init_task_tag;639 /* session wide counter: target assigned task tag */640 u32 targ_xfer_tag;641 u32 cmdsn_window;642 643 /* protects cmdsn values */644 struct mutex cmdsn_mutex;645 /* session wide counter: expected command sequence number */646 u32 exp_cmd_sn;647 /* session wide counter: maximum allowed command sequence number */648 atomic_t max_cmd_sn;649 struct list_head sess_ooo_cmdsn_list;650 651 /* LIO specific session ID */652 u32 sid;653 char auth_type[8];654 /* unique within the target */655 int session_index;656 /* Used for session reference counting */657 int session_usage_count;658 int session_waiting_on_uc;659 atomic_long_t cmd_pdus;660 atomic_long_t rsp_pdus;661 atomic_long_t tx_data_octets;662 atomic_long_t rx_data_octets;663 atomic_long_t conn_digest_errors;664 atomic_long_t conn_timeout_errors;665 u64 creation_time;666 /* Number of active connections */667 atomic_t nconn;668 atomic_t session_continuation;669 atomic_t session_fall_back_to_erl0;670 atomic_t session_logout;671 atomic_t session_reinstatement;672 atomic_t session_stop_active;673 atomic_t session_close;674 /* connection list */675 struct list_head sess_conn_list;676 struct list_head cr_active_list;677 struct list_head cr_inactive_list;678 spinlock_t conn_lock;679 spinlock_t cr_a_lock;680 spinlock_t cr_i_lock;681 spinlock_t session_usage_lock;682 spinlock_t ttt_lock;683 struct completion async_msg_comp;684 struct completion reinstatement_comp;685 struct completion session_wait_comp;686 struct completion session_waiting_on_uc_comp;687 struct timer_list time2retain_timer;688 struct iscsi_sess_ops *sess_ops;689 struct se_session *se_sess;690 struct iscsi_portal_group *tpg;691} ____cacheline_aligned;692 693struct iscsi_login {694 u8 auth_complete;695 u8 checked_for_existing;696 u8 current_stage;697 u8 leading_connection;698 u8 first_request;699 u8 version_min;700 u8 version_max;701 u8 login_complete;702 u8 login_failed;703 bool zero_tsih;704 char isid[6];705 u32 cmd_sn;706 itt_t init_task_tag;707 u32 initial_exp_statsn;708 u32 rsp_length;709 u16 cid;710 u16 tsih;711 char req[ISCSI_HDR_LEN];712 char rsp[ISCSI_HDR_LEN];713 char *req_buf;714 char *rsp_buf;715 struct iscsit_conn *conn;716 struct iscsi_np *np;717} ____cacheline_aligned;718 719struct iscsi_node_attrib {720 s32 authentication;721 u32 dataout_timeout;722 u32 dataout_timeout_retries;723 u32 default_erl;724 u32 nopin_timeout;725 u32 nopin_response_timeout;726 u32 random_datain_pdu_offsets;727 u32 random_datain_seq_offsets;728 u32 random_r2t_offsets;729 u32 tmr_cold_reset;730 u32 tmr_warm_reset;731 struct iscsi_node_acl *nacl;732};733 734struct se_dev_entry_s;735 736struct iscsi_node_auth {737 enum naf_flags_table naf_flags;738 int authenticate_target;739 /* Used for iscsit_global->discovery_auth,740 * set to zero (auth disabled) by default */741 int enforce_discovery_auth;742#define MAX_USER_LEN 256743#define MAX_PASS_LEN 256744 char userid[MAX_USER_LEN];745 char password[MAX_PASS_LEN];746 char userid_mutual[MAX_USER_LEN];747 char password_mutual[MAX_PASS_LEN];748};749 750#include "iscsi_target_stat.h"751 752struct iscsi_node_stat_grps {753 struct config_group iscsi_sess_stats_group;754 struct config_group iscsi_conn_stats_group;755};756 757struct iscsi_node_acl {758 struct se_node_acl se_node_acl;759 struct iscsi_node_attrib node_attrib;760 struct iscsi_node_auth node_auth;761 struct iscsi_node_stat_grps node_stat_grps;762};763 764static inline struct iscsi_node_acl *765to_iscsi_nacl(struct se_node_acl *se_nacl)766{767 return container_of(se_nacl, struct iscsi_node_acl, se_node_acl);768}769 770struct iscsi_tpg_attrib {771 u32 authentication;772 u32 login_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 787struct 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 u32 np_exports;795 enum np_flags_table np_flags;796 spinlock_t np_thread_lock;797 struct completion np_restart_comp;798 struct socket *np_socket;799 struct sockaddr_storage np_sockaddr;800 struct task_struct *np_thread;801 void *np_context;802 struct iscsit_transport *np_transport;803 struct list_head np_list;804} ____cacheline_aligned;805 806struct 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 819struct 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 848static inline struct iscsi_portal_group *849to_iscsi_tpg(struct se_portal_group *se_tpg)850{851 return container_of(se_tpg, struct iscsi_portal_group, tpg_se_tpg);852}853 854struct iscsi_wwn_stat_grps {855 struct config_group iscsi_stat_group;856 struct config_group iscsi_instance_group;857 struct config_group iscsi_sess_err_group;858 struct config_group iscsi_tgt_attr_group;859 struct config_group iscsi_login_stats_group;860 struct config_group iscsi_logout_stats_group;861};862 863struct iscsi_tiqn {864 unsigned char tiqn[ISCSI_IQN_LEN];865 enum tiqn_state_table tiqn_state;866 int tiqn_access_count;867 u32 tiqn_active_tpgs;868 u32 tiqn_ntpgs;869 u32 tiqn_num_tpg_nps;870 u32 tiqn_nsessions;871 struct list_head tiqn_list;872 struct list_head tiqn_tpg_list;873 spinlock_t tiqn_state_lock;874 spinlock_t tiqn_tpg_lock;875 struct se_wwn tiqn_wwn;876 struct iscsi_wwn_stat_grps tiqn_stat_grps;877 int tiqn_index;878 struct iscsi_sess_err_stats sess_err_stats;879 struct iscsi_login_stats login_stats;880 struct iscsi_logout_stats logout_stats;881} ____cacheline_aligned;882 883struct iscsit_global {884 /* In core shutdown */885 u32 in_shutdown;886 u32 active_ts;887 /* Unique identifier used for the authentication daemon */888 u32 auth_id;889 u32 inactive_ts;890#define ISCSIT_BITMAP_BITS 262144891 /* Thread Set bitmap pointer */892 unsigned long *ts_bitmap;893 spinlock_t ts_bitmap_lock;894 cpumask_var_t allowed_cpumask;895 /* Used for iSCSI discovery session authentication */896 struct iscsi_node_acl discovery_acl;897 struct iscsi_portal_group *discovery_tpg;898};899 900static inline u32 session_get_next_ttt(struct iscsit_session *session)901{902 u32 ttt;903 904 spin_lock_bh(&session->ttt_lock);905 ttt = session->targ_xfer_tag++;906 if (ttt == 0xFFFFFFFF)907 ttt = session->targ_xfer_tag++;908 spin_unlock_bh(&session->ttt_lock);909 910 return ttt;911}912 913extern struct iscsit_cmd *iscsit_find_cmd_from_itt(struct iscsit_conn *, itt_t);914 915extern void iscsit_thread_check_cpumask(struct iscsit_conn *conn,916 struct task_struct *p,917 int mode);918 919#endif /* ISCSI_TARGET_CORE_H */920