1 #ifndef ISCSI_TARGET_CORE_H
2 #define ISCSI_TARGET_CORE_H
5 #include <linux/configfs.h>
8 #include <scsi/iscsi_proto.h>
9 #include <target/target_core_base.h>
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"
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
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
68 * Used to control the sending of keys with optional to respond state bit,
69 * as a workaround for non RFC compliant initiators,that do not propose,
70 * nor respond to specific keys required for login to complete.
72 * See iscsi_check_proposer_for_optional_reply() for more details.
74 #define TA_DEFAULT_LOGIN_KEYS_WORKAROUND 1
76 #define ISCSI_IOV_DATA_BUFFER 5
78 enum iscsit_transport_type {
88 /* RFC-3720 7.1.4 Standard Connection State Diagram for a Target */
89 enum target_conn_state_table {
90 TARG_CONN_STATE_FREE = 0x1,
91 TARG_CONN_STATE_XPT_UP = 0x3,
92 TARG_CONN_STATE_IN_LOGIN = 0x4,
93 TARG_CONN_STATE_LOGGED_IN = 0x5,
94 TARG_CONN_STATE_IN_LOGOUT = 0x6,
95 TARG_CONN_STATE_LOGOUT_REQUESTED = 0x7,
96 TARG_CONN_STATE_CLEANUP_WAIT = 0x8,
99 /* RFC-3720 7.3.2 Session State Diagram for a Target */
100 enum target_sess_state_table {
101 TARG_SESS_STATE_FREE = 0x1,
102 TARG_SESS_STATE_ACTIVE = 0x2,
103 TARG_SESS_STATE_LOGGED_IN = 0x3,
104 TARG_SESS_STATE_FAILED = 0x4,
105 TARG_SESS_STATE_IN_CONTINUE = 0x5,
108 /* struct iscsi_data_count->type */
109 enum data_count_type {
114 /* struct iscsi_datain_req->dr_complete */
115 enum datain_req_comp_table {
116 DATAIN_COMPLETE_NORMAL = 1,
117 DATAIN_COMPLETE_WITHIN_COMMAND_RECOVERY = 2,
118 DATAIN_COMPLETE_CONNECTION_RECOVERY = 3,
121 /* struct iscsi_datain_req->recovery */
122 enum datain_req_rec_table {
123 DATAIN_WITHIN_COMMAND_RECOVERY = 1,
124 DATAIN_CONNECTION_RECOVERY = 2,
127 /* struct iscsi_portal_group->state */
128 enum tpg_state_table {
130 TPG_STATE_ACTIVE = 1,
131 TPG_STATE_INACTIVE = 2,
132 TPG_STATE_COLD_RESET = 3,
135 /* struct iscsi_tiqn->tiqn_state */
136 enum tiqn_state_table {
137 TIQN_STATE_ACTIVE = 1,
138 TIQN_STATE_SHUTDOWN = 2,
141 /* struct iscsi_cmd->cmd_flags */
142 enum cmd_flags_table {
143 ICF_GOT_LAST_DATAOUT = 0x00000001,
144 ICF_GOT_DATACK_SNACK = 0x00000002,
145 ICF_NON_IMMEDIATE_UNSOLICITED_DATA = 0x00000004,
146 ICF_SENT_LAST_R2T = 0x00000008,
147 ICF_WITHIN_COMMAND_RECOVERY = 0x00000010,
148 ICF_CONTIG_MEMORY = 0x00000020,
149 ICF_ATTACHED_TO_RQUEUE = 0x00000040,
150 ICF_OOO_CMDSN = 0x00000080,
151 ICF_SENDTARGETS_ALL = 0x00000100,
152 ICF_SENDTARGETS_SINGLE = 0x00000200,
155 /* struct iscsi_cmd->i_state */
156 enum cmd_i_state_table {
159 ISTATE_DEFERRED_CMD = 2,
160 ISTATE_UNSOLICITED_DATA = 3,
161 ISTATE_RECEIVE_DATAOUT = 4,
162 ISTATE_RECEIVE_DATAOUT_RECOVERY = 5,
163 ISTATE_RECEIVED_LAST_DATAOUT = 6,
164 ISTATE_WITHIN_DATAOUT_RECOVERY = 7,
165 ISTATE_IN_CONNECTION_RECOVERY = 8,
166 ISTATE_RECEIVED_TASKMGT = 9,
167 ISTATE_SEND_ASYNCMSG = 10,
168 ISTATE_SENT_ASYNCMSG = 11,
169 ISTATE_SEND_DATAIN = 12,
170 ISTATE_SEND_LAST_DATAIN = 13,
171 ISTATE_SENT_LAST_DATAIN = 14,
172 ISTATE_SEND_LOGOUTRSP = 15,
173 ISTATE_SENT_LOGOUTRSP = 16,
174 ISTATE_SEND_NOPIN = 17,
175 ISTATE_SENT_NOPIN = 18,
176 ISTATE_SEND_REJECT = 19,
177 ISTATE_SENT_REJECT = 20,
178 ISTATE_SEND_R2T = 21,
179 ISTATE_SENT_R2T = 22,
180 ISTATE_SEND_R2T_RECOVERY = 23,
181 ISTATE_SENT_R2T_RECOVERY = 24,
182 ISTATE_SEND_LAST_R2T = 25,
183 ISTATE_SENT_LAST_R2T = 26,
184 ISTATE_SEND_LAST_R2T_RECOVERY = 27,
185 ISTATE_SENT_LAST_R2T_RECOVERY = 28,
186 ISTATE_SEND_STATUS = 29,
187 ISTATE_SEND_STATUS_BROKEN_PC = 30,
188 ISTATE_SENT_STATUS = 31,
189 ISTATE_SEND_STATUS_RECOVERY = 32,
190 ISTATE_SENT_STATUS_RECOVERY = 33,
191 ISTATE_SEND_TASKMGTRSP = 34,
192 ISTATE_SENT_TASKMGTRSP = 35,
193 ISTATE_SEND_TEXTRSP = 36,
194 ISTATE_SENT_TEXTRSP = 37,
195 ISTATE_SEND_NOPIN_WANT_RESPONSE = 38,
196 ISTATE_SENT_NOPIN_WANT_RESPONSE = 39,
197 ISTATE_SEND_NOPIN_NO_RESPONSE = 40,
202 /* Used for iscsi_recover_cmdsn() return values */
203 enum recover_cmdsn_ret_table {
204 CMDSN_ERROR_CANNOT_RECOVER = -1,
205 CMDSN_NORMAL_OPERATION = 0,
206 CMDSN_LOWER_THAN_EXP = 1,
207 CMDSN_HIGHER_THAN_EXP = 2,
208 CMDSN_MAXCMDSN_OVERRUN = 3,
211 /* Used for iscsi_handle_immediate_data() return values */
212 enum immedate_data_ret_table {
213 IMMEDIATE_DATA_CANNOT_RECOVER = -1,
214 IMMEDIATE_DATA_NORMAL_OPERATION = 0,
215 IMMEDIATE_DATA_ERL1_CRC_FAILURE = 1,
218 /* Used for iscsi_decide_dataout_action() return values */
219 enum dataout_action_ret_table {
220 DATAOUT_CANNOT_RECOVER = -1,
222 DATAOUT_SEND_R2T = 1,
223 DATAOUT_SEND_TO_TRANSPORT = 2,
224 DATAOUT_WITHIN_COMMAND_RECOVERY = 3,
227 /* Used for struct iscsi_node_auth->naf_flags */
228 enum naf_flags_table {
229 NAF_USERID_SET = 0x01,
230 NAF_PASSWORD_SET = 0x02,
231 NAF_USERID_IN_SET = 0x04,
232 NAF_PASSWORD_IN_SET = 0x08,
235 /* Used by various struct timer_list to manage iSCSI specific state */
236 enum iscsi_timer_flags_table {
237 ISCSI_TF_RUNNING = 0x01,
238 ISCSI_TF_STOP = 0x02,
239 ISCSI_TF_EXPIRED = 0x04,
242 /* Used for struct iscsi_np->np_flags */
243 enum np_flags_table {
244 NPF_IP_NETWORK = 0x00,
247 /* Used for struct iscsi_np->np_thread_state */
248 enum np_thread_state_table {
249 ISCSI_NP_THREAD_ACTIVE = 1,
250 ISCSI_NP_THREAD_INACTIVE = 2,
251 ISCSI_NP_THREAD_RESET = 3,
252 ISCSI_NP_THREAD_SHUTDOWN = 4,
253 ISCSI_NP_THREAD_EXIT = 5,
256 struct iscsi_conn_ops {
257 u8 HeaderDigest; /* [0,1] == [None,CRC32C] */
258 u8 DataDigest; /* [0,1] == [None,CRC32C] */
259 u32 MaxRecvDataSegmentLength; /* [512..2**24-1] */
260 u32 MaxXmitDataSegmentLength; /* [512..2**24-1] */
262 * iSER specific connection parameters
264 u32 InitiatorRecvDataSegmentLength; /* [512..2**24-1] */
265 u32 TargetRecvDataSegmentLength; /* [512..2**24-1] */
268 struct iscsi_sess_ops {
269 char InitiatorName[224];
270 char InitiatorAlias[256];
271 char TargetName[224];
272 char TargetAlias[256];
273 char TargetAddress[256];
274 u16 TargetPortalGroupTag; /* [0..65535] */
275 u16 MaxConnections; /* [1..65535] */
276 u8 InitialR2T; /* [0,1] == [No,Yes] */
277 u8 ImmediateData; /* [0,1] == [No,Yes] */
278 u32 MaxBurstLength; /* [512..2**24-1] */
279 u32 FirstBurstLength; /* [512..2**24-1] */
280 u16 DefaultTime2Wait; /* [0..3600] */
281 u16 DefaultTime2Retain; /* [0..3600] */
282 u16 MaxOutstandingR2T; /* [1..65535] */
283 u8 DataPDUInOrder; /* [0,1] == [No,Yes] */
284 u8 DataSequenceInOrder; /* [0,1] == [No,Yes] */
285 u8 ErrorRecoveryLevel; /* [0..2] */
286 u8 SessionType; /* [0,1] == [Normal,Discovery]*/
288 * iSER specific session parameters
290 u8 RDMAExtensions; /* [0,1] == [No,Yes] */
293 struct iscsi_queue_req {
295 struct iscsi_cmd *cmd;
296 struct list_head qr_list;
299 struct iscsi_data_count {
301 int sync_and_steering;
302 enum data_count_type type;
309 struct iscsi_param_list {
311 struct list_head param_list;
312 struct list_head extra_response_list;
315 struct iscsi_datain_req {
316 enum datain_req_comp_table dr_complete;
317 int generate_recovery_values;
318 enum datain_req_rec_table recovery;
327 struct list_head cmd_datain_node;
328 } ____cacheline_aligned;
330 struct iscsi_ooo_cmdsn {
335 struct iscsi_cmd *cmd;
336 struct list_head ooo_list;
337 } ____cacheline_aligned;
339 struct iscsi_datain {
344 } ____cacheline_aligned;
354 struct list_head r2t_list;
355 } ____cacheline_aligned;
358 enum iscsi_timer_flags_table dataout_timer_flags;
359 /* DataOUT timeout retries */
360 u8 dataout_timeout_retries;
361 /* Within command recovery count */
362 u8 error_recovery_count;
363 /* iSCSI dependent state for out or order CmdSNs */
364 enum cmd_i_state_table deferred_i_state;
365 /* iSCSI dependent state */
366 enum cmd_i_state_table i_state;
367 /* Command is an immediate command (ISCSI_OP_IMMEDIATE set) */
369 /* Immediate data present */
373 /* iSCSI Response Code */
375 /* Logout reason when iscsi_opcode == ISCSI_INIT_LOGOUT_CMND */
377 /* Logout response code when iscsi_opcode == ISCSI_INIT_LOGOUT_CMND */
379 /* MaxCmdSN has been incremented */
381 /* Immediate Unsolicited Dataout */
383 /* Reject reason code */
385 /* CID contained in logout PDU when opcode == ISCSI_INIT_LOGOUT_CMND */
388 enum cmd_flags_table cmd_flags;
389 /* Initiator Task Tag assigned from Initiator */
391 /* Target Transfer Tag assigned from Target */
393 /* CmdSN assigned from Initiator */
395 /* ExpStatSN assigned from Initiator */
397 /* StatSN assigned to this ITT */
403 /* Last DataSN acknowledged via DataAck SNACK */
405 /* Used for echoing NOPOUT ping data */
407 /* Used to store DataDigest */
409 /* Counter for MaxOutstandingR2T */
410 u32 outstanding_r2ts;
411 /* Next R2T Offset when DataSequenceInOrder=Yes */
413 /* Iovec current and orig count for iscsi_cmd->iov_data */
415 u32 orig_iov_data_count;
416 /* Number of miscellaneous iovecs used for IP stack calls */
418 /* Number of struct iscsi_pdu in struct iscsi_cmd->pdu_list */
420 /* Next struct iscsi_pdu to send in struct iscsi_cmd->pdu_list */
422 /* Current struct iscsi_pdu in struct iscsi_cmd->pdu_list */
424 /* Next struct iscsi_seq to send in struct iscsi_cmd->seq_list */
426 /* Number of struct iscsi_seq in struct iscsi_cmd->seq_list */
428 /* Current struct iscsi_seq in struct iscsi_cmd->seq_list */
430 /* Lowest offset in current DataOUT sequence */
431 u32 seq_start_offset;
432 /* Highest offset in current DataOUT sequence */
434 /* Total size in bytes received so far of READ data */
436 /* Total size in bytes received so far of WRITE data */
438 /* Counter for FirstBurstLength key */
440 /* Counter for MaxBurstLength key */
442 /* Transfer size used for IP stack calls */
444 /* Buffer used for various purposes */
446 /* Used by SendTargets=[iqn.,eui.] discovery */
448 /* See include/linux/dma-mapping.h */
449 enum dma_data_direction data_direction;
450 /* iSCSI PDU Header + CRC */
451 unsigned char pdu[ISCSI_HDR_LEN + ISCSI_CRC_LEN];
452 /* Number of times struct iscsi_cmd is present in immediate queue */
453 atomic_t immed_queue_count;
454 atomic_t response_queue_count;
455 spinlock_t datain_lock;
456 spinlock_t dataout_timeout_lock;
457 /* spinlock for protecting struct iscsi_cmd->i_state */
458 spinlock_t istate_lock;
459 /* spinlock for adding within command recovery entries */
460 spinlock_t error_lock;
461 /* spinlock for adding R2Ts */
464 struct list_head datain_list;
466 struct list_head cmd_r2t_list;
467 /* Timer for DataOUT */
468 struct timer_list dataout_timer;
469 /* Iovecs for SCSI data payload RX/TX w/ kernel level sockets */
470 struct kvec *iov_data;
471 /* Iovecs for miscellaneous purposes */
472 #define ISCSI_MISC_IOVECS 5
473 struct kvec iov_misc[ISCSI_MISC_IOVECS];
474 /* Array of struct iscsi_pdu used for DataPDUInOrder=No */
475 struct iscsi_pdu *pdu_list;
476 /* Current struct iscsi_pdu used for DataPDUInOrder=No */
477 struct iscsi_pdu *pdu_ptr;
478 /* Array of struct iscsi_seq used for DataSequenceInOrder=No */
479 struct iscsi_seq *seq_list;
480 /* Current struct iscsi_seq used for DataSequenceInOrder=No */
481 struct iscsi_seq *seq_ptr;
482 /* TMR Request when iscsi_opcode == ISCSI_OP_SCSI_TMFUNC */
483 struct iscsi_tmr_req *tmr_req;
484 /* Connection this command is alligient to */
485 struct iscsi_conn *conn;
486 /* Pointer to connection recovery entry */
487 struct iscsi_conn_recovery *cr;
488 /* Session the command is part of, used for connection recovery */
489 struct iscsi_session *sess;
490 /* list_head for connection list */
491 struct list_head i_conn_node;
492 /* The TCM I/O descriptor that is accessed via container_of() */
493 struct se_cmd se_cmd;
494 /* Sense buffer that will be mapped into outgoing status */
495 #define ISCSI_SENSE_BUFFER_LEN (TRANSPORT_SENSE_BUFFER + 2)
496 unsigned char sense_buffer[ISCSI_SENSE_BUFFER_LEN];
501 struct scatterlist *first_data_sg;
502 u32 first_data_sg_off;
504 sense_reason_t sense_reason;
505 } ____cacheline_aligned;
507 struct iscsi_tmr_req {
508 bool task_reassign:1;
510 struct iscsi_cmd *ref_cmd;
511 struct iscsi_conn_recovery *conn_recovery;
512 struct se_tmr_req *se_tmr_req;
516 wait_queue_head_t queues_wq;
517 /* Authentication Successful for this connection */
519 /* State connection is currently in */
521 u8 conn_logout_reason;
522 u8 network_transport;
523 enum iscsi_timer_flags_table nopin_timer_flags;
524 enum iscsi_timer_flags_table nopin_response_timer_flags;
525 /* Used to know what thread encountered a transport failure */
527 /* connection id assigned by the Initiator */
529 /* Remote TCP Port */
535 /* Used for iscsi_tx_login_rsp() */
538 /* Per connection status sequence number */
540 struct sockaddr_storage login_sockaddr;
541 struct sockaddr_storage local_sockaddr;
542 int conn_usage_count;
543 int conn_waiting_on_uc;
544 atomic_t check_immediate_queue;
545 atomic_t conn_logout_remove;
546 atomic_t connection_exit;
547 atomic_t connection_recovery;
548 atomic_t connection_reinstatement;
549 atomic_t connection_wait_rcfr;
550 atomic_t sleep_on_conn_wait_comp;
551 atomic_t transport_failed;
552 struct completion conn_post_wait_comp;
553 struct completion conn_wait_comp;
554 struct completion conn_wait_rcfr_comp;
555 struct completion conn_waiting_on_uc_comp;
556 struct completion conn_logout_comp;
557 struct completion tx_half_close_comp;
558 struct completion rx_half_close_comp;
559 /* socket used by this connection */
561 void (*orig_data_ready)(struct sock *);
562 void (*orig_state_change)(struct sock *);
563 #define LOGIN_FLAGS_READ_ACTIVE 1
564 #define LOGIN_FLAGS_CLOSED 2
565 #define LOGIN_FLAGS_READY 4
566 #define LOGIN_FLAGS_INITIAL_PDU 8
567 unsigned long login_flags;
568 struct delayed_work login_work;
569 struct delayed_work login_cleanup_work;
570 struct iscsi_login *login;
571 struct timer_list nopin_timer;
572 struct timer_list nopin_response_timer;
573 struct timer_list transport_timer;
574 struct task_struct *login_kworker;
575 /* Spinlock used for add/deleting cmd's from conn_cmd_list */
577 spinlock_t conn_usage_lock;
578 spinlock_t immed_queue_lock;
579 spinlock_t nopin_timer_lock;
580 spinlock_t response_queue_lock;
581 spinlock_t state_lock;
582 /* libcrypto RX and TX contexts for crc32c */
583 struct ahash_request *conn_rx_hash;
584 struct ahash_request *conn_tx_hash;
585 /* Used for scheduling TX and RX connection kthreads */
586 cpumask_var_t conn_cpumask;
587 unsigned int conn_rx_reset_cpumask:1;
588 unsigned int conn_tx_reset_cpumask:1;
589 /* list_head of struct iscsi_cmd for this connection */
590 struct list_head conn_cmd_list;
591 struct list_head immed_queue_list;
592 struct list_head response_queue_list;
593 struct iscsi_conn_ops *conn_ops;
594 struct iscsi_login *conn_login;
595 struct iscsit_transport *conn_transport;
596 struct iscsi_param_list *param_list;
597 /* Used for per connection auth state machine */
600 struct iscsi_login_thread_s *login_thread;
601 struct iscsi_portal_group *tpg;
602 struct iscsi_tpg_np *tpg_np;
603 /* Pointer to parent session */
604 struct iscsi_session *sess;
606 int rx_thread_active;
607 struct task_struct *rx_thread;
608 struct completion rx_login_comp;
609 int tx_thread_active;
610 struct task_struct *tx_thread;
611 /* list_head for session connection list */
612 struct list_head conn_list;
613 } ____cacheline_aligned;
615 struct iscsi_conn_recovery {
618 u32 maxrecvdatasegmentlength;
619 u32 maxxmitdatasegmentlength;
620 int ready_for_reallegiance;
621 struct list_head conn_recovery_cmd_list;
622 spinlock_t conn_recovery_cmd_lock;
623 struct timer_list time2retain_timer;
624 struct iscsi_session *sess;
625 struct list_head cr_list;
626 } ____cacheline_aligned;
628 struct iscsi_session {
631 enum iscsi_timer_flags_table time2retain_timer_flags;
634 u16 conn_recovery_count;
636 /* state session is currently in */
638 /* session wide counter: initiator assigned task tag */
640 /* session wide counter: target assigned task tag */
644 /* protects cmdsn values */
645 struct mutex cmdsn_mutex;
646 /* session wide counter: expected command sequence number */
648 /* session wide counter: maximum allowed command sequence number */
650 struct list_head sess_ooo_cmdsn_list;
652 /* LIO specific session ID */
655 /* unique within the target */
657 /* Used for session reference counting */
658 int session_usage_count;
659 int session_waiting_on_uc;
660 atomic_long_t cmd_pdus;
661 atomic_long_t rsp_pdus;
662 atomic_long_t tx_data_octets;
663 atomic_long_t rx_data_octets;
664 atomic_long_t conn_digest_errors;
665 atomic_long_t conn_timeout_errors;
667 /* Number of active connections */
669 atomic_t session_continuation;
670 atomic_t session_fall_back_to_erl0;
671 atomic_t session_logout;
672 atomic_t session_reinstatement;
673 atomic_t session_stop_active;
674 atomic_t session_close;
675 /* connection list */
676 struct list_head sess_conn_list;
677 struct list_head cr_active_list;
678 struct list_head cr_inactive_list;
679 spinlock_t conn_lock;
680 spinlock_t cr_a_lock;
681 spinlock_t cr_i_lock;
682 spinlock_t session_usage_lock;
684 struct completion async_msg_comp;
685 struct completion reinstatement_comp;
686 struct completion session_wait_comp;
687 struct completion session_waiting_on_uc_comp;
688 struct timer_list time2retain_timer;
689 struct iscsi_sess_ops *sess_ops;
690 struct se_session *se_sess;
691 struct iscsi_portal_group *tpg;
692 } ____cacheline_aligned;
696 u8 checked_for_existing;
698 u8 leading_connection;
708 u32 initial_exp_statsn;
712 char req[ISCSI_HDR_LEN];
713 char rsp[ISCSI_HDR_LEN];
716 struct iscsi_conn *conn;
718 } ____cacheline_aligned;
720 struct iscsi_node_attrib {
722 u32 dataout_timeout_retries;
725 u32 nopin_response_timeout;
726 u32 random_datain_pdu_offsets;
727 u32 random_datain_seq_offsets;
728 u32 random_r2t_offsets;
731 struct iscsi_node_acl *nacl;
734 struct se_dev_entry_s;
736 struct 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 256
743 #define MAX_PASS_LEN 256
744 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];
750 #include "iscsi_target_stat.h"
752 struct iscsi_node_stat_grps {
753 struct config_group iscsi_sess_stats_group;
754 struct config_group iscsi_conn_stats_group;
757 struct 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;
764 struct iscsi_tpg_attrib {
768 u32 generate_node_acls;
769 u32 cache_dynamic_acls;
770 u32 default_cmdsn_depth;
771 u32 demo_mode_write_protect;
772 u32 prod_mode_write_protect;
773 u32 demo_mode_discovery;
776 u32 fabric_prot_type;
777 u32 tpg_enabled_sendtargets;
778 u32 login_keys_workaround;
779 struct iscsi_portal_group *tpg;
783 int np_network_transport;
786 enum np_thread_state_table np_thread_state;
788 atomic_t np_reset_count;
789 enum iscsi_timer_flags_table np_login_timer_flags;
791 enum np_flags_table np_flags;
792 spinlock_t np_thread_lock;
793 struct completion np_restart_comp;
794 struct socket *np_socket;
795 struct sockaddr_storage np_sockaddr;
796 struct task_struct *np_thread;
797 struct timer_list np_login_timer;
799 struct iscsit_transport *np_transport;
800 struct list_head np_list;
801 } ____cacheline_aligned;
803 struct iscsi_tpg_np {
804 struct iscsi_np *tpg_np;
805 struct iscsi_portal_group *tpg;
806 struct iscsi_tpg_np *tpg_np_parent;
807 struct list_head tpg_np_list;
808 struct list_head tpg_np_child_list;
809 struct list_head tpg_np_parent_list;
810 struct se_tpg_np se_tpg_np;
811 spinlock_t tpg_np_parent_lock;
812 struct completion tpg_np_comp;
813 struct kref tpg_np_kref;
816 struct iscsi_portal_group {
817 unsigned char tpg_chap_id;
819 enum tpg_state_table tpg_state;
820 /* Target Portal Group Tag */
822 /* Id assigned to target sessions */
824 /* Number of active sessions */
826 /* Number of Network Portals available for this TPG */
828 /* Per TPG LIO specific session ID. */
830 /* Spinlock for adding/removing Network Portals */
831 spinlock_t tpg_np_lock;
832 spinlock_t tpg_state_lock;
833 struct se_portal_group tpg_se_tpg;
834 struct mutex tpg_access_lock;
835 struct semaphore np_login_sem;
836 struct iscsi_tpg_attrib tpg_attrib;
837 struct iscsi_node_auth tpg_demo_auth;
838 /* Pointer to default list of iSCSI parameters for TPG */
839 struct iscsi_param_list *param_list;
840 struct iscsi_tiqn *tpg_tiqn;
841 struct list_head tpg_gnp_list;
842 struct list_head tpg_list;
843 } ____cacheline_aligned;
845 struct iscsi_wwn_stat_grps {
846 struct config_group iscsi_stat_group;
847 struct config_group iscsi_instance_group;
848 struct config_group iscsi_sess_err_group;
849 struct config_group iscsi_tgt_attr_group;
850 struct config_group iscsi_login_stats_group;
851 struct config_group iscsi_logout_stats_group;
855 #define ISCSI_IQN_LEN 224
856 unsigned char tiqn[ISCSI_IQN_LEN];
857 enum tiqn_state_table tiqn_state;
858 int tiqn_access_count;
859 u32 tiqn_active_tpgs;
861 u32 tiqn_num_tpg_nps;
863 struct list_head tiqn_list;
864 struct list_head tiqn_tpg_list;
865 spinlock_t tiqn_state_lock;
866 spinlock_t tiqn_tpg_lock;
867 struct se_wwn tiqn_wwn;
868 struct iscsi_wwn_stat_grps tiqn_stat_grps;
870 struct iscsi_sess_err_stats sess_err_stats;
871 struct iscsi_login_stats login_stats;
872 struct iscsi_logout_stats logout_stats;
873 } ____cacheline_aligned;
875 struct iscsit_global {
876 /* In core shutdown */
879 /* Unique identifier used for the authentication daemon */
882 #define ISCSIT_BITMAP_BITS 262144
883 /* Thread Set bitmap pointer */
884 unsigned long *ts_bitmap;
885 spinlock_t ts_bitmap_lock;
886 /* Used for iSCSI discovery session authentication */
887 struct iscsi_node_acl discovery_acl;
888 struct iscsi_portal_group *discovery_tpg;
891 static inline u32 session_get_next_ttt(struct iscsi_session *session)
895 spin_lock_bh(&session->ttt_lock);
896 ttt = session->targ_xfer_tag++;
897 if (ttt == 0xFFFFFFFF)
898 ttt = session->targ_xfer_tag++;
899 spin_unlock_bh(&session->ttt_lock);
904 extern struct iscsi_cmd *iscsit_find_cmd_from_itt(struct iscsi_conn *, itt_t);
906 static inline void iscsit_thread_check_cpumask(
907 struct iscsi_conn *conn,
908 struct task_struct *p,
912 * mode == 1 signals iscsi_target_tx_thread() usage.
913 * mode == 0 signals iscsi_target_rx_thread() usage.
916 if (!conn->conn_tx_reset_cpumask)
918 conn->conn_tx_reset_cpumask = 0;
920 if (!conn->conn_rx_reset_cpumask)
922 conn->conn_rx_reset_cpumask = 0;
925 * Update the CPU mask for this single kthread so that
926 * both TX and RX kthreads are scheduled to run on the
929 set_cpus_allowed_ptr(p, conn->conn_cpumask);
931 #endif /* ISCSI_TARGET_CORE_H */