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target: pass sense_reason as a return value
[GitHub/exynos8895/android_kernel_samsung_universal8895.git] / drivers / target / iscsi / iscsi_target_core.h
1 #ifndef ISCSI_TARGET_CORE_H
2 #define ISCSI_TARGET_CORE_H
3
4 #include <linux/in.h>
5 #include <linux/configfs.h>
6 #include <net/sock.h>
7 #include <net/tcp.h>
8 #include <scsi/scsi_cmnd.h>
9 #include <scsi/iscsi_proto.h>
10 #include <target/target_core_base.h>
11
12 #define ISCSIT_VERSION "v4.1.0-rc2"
13 #define ISCSI_MAX_DATASN_MISSING_COUNT 16
14 #define ISCSI_TX_THREAD_TCP_TIMEOUT 2
15 #define ISCSI_RX_THREAD_TCP_TIMEOUT 2
16 #define SECONDS_FOR_ASYNC_LOGOUT 10
17 #define SECONDS_FOR_ASYNC_TEXT 10
18 #define SECONDS_FOR_LOGOUT_COMP 15
19 #define WHITE_SPACE " \t\v\f\n\r"
20
21 /* struct iscsi_node_attrib sanity values */
22 #define NA_DATAOUT_TIMEOUT 3
23 #define NA_DATAOUT_TIMEOUT_MAX 60
24 #define NA_DATAOUT_TIMEOUT_MIX 2
25 #define NA_DATAOUT_TIMEOUT_RETRIES 5
26 #define NA_DATAOUT_TIMEOUT_RETRIES_MAX 15
27 #define NA_DATAOUT_TIMEOUT_RETRIES_MIN 1
28 #define NA_NOPIN_TIMEOUT 15
29 #define NA_NOPIN_TIMEOUT_MAX 60
30 #define NA_NOPIN_TIMEOUT_MIN 3
31 #define NA_NOPIN_RESPONSE_TIMEOUT 30
32 #define NA_NOPIN_RESPONSE_TIMEOUT_MAX 60
33 #define NA_NOPIN_RESPONSE_TIMEOUT_MIN 3
34 #define NA_RANDOM_DATAIN_PDU_OFFSETS 0
35 #define NA_RANDOM_DATAIN_SEQ_OFFSETS 0
36 #define NA_RANDOM_R2T_OFFSETS 0
37 #define NA_DEFAULT_ERL 0
38 #define NA_DEFAULT_ERL_MAX 2
39 #define NA_DEFAULT_ERL_MIN 0
40
41 /* struct iscsi_tpg_attrib sanity values */
42 #define TA_AUTHENTICATION 1
43 #define TA_LOGIN_TIMEOUT 15
44 #define TA_LOGIN_TIMEOUT_MAX 30
45 #define TA_LOGIN_TIMEOUT_MIN 5
46 #define TA_NETIF_TIMEOUT 2
47 #define TA_NETIF_TIMEOUT_MAX 15
48 #define TA_NETIF_TIMEOUT_MIN 2
49 #define TA_GENERATE_NODE_ACLS 0
50 #define TA_DEFAULT_CMDSN_DEPTH 16
51 #define TA_DEFAULT_CMDSN_DEPTH_MAX 512
52 #define TA_DEFAULT_CMDSN_DEPTH_MIN 1
53 #define TA_CACHE_DYNAMIC_ACLS 0
54 /* Enabled by default in demo mode (generic_node_acls=1) */
55 #define TA_DEMO_MODE_WRITE_PROTECT 1
56 /* Disabled by default in production mode w/ explict ACLs */
57 #define TA_PROD_MODE_WRITE_PROTECT 0
58 #define TA_CACHE_CORE_NPS 0
59
60
61 #define ISCSI_IOV_DATA_BUFFER 5
62
63 enum tpg_np_network_transport_table {
64 ISCSI_TCP = 0,
65 ISCSI_SCTP_TCP = 1,
66 ISCSI_SCTP_UDP = 2,
67 ISCSI_IWARP_TCP = 3,
68 ISCSI_IWARP_SCTP = 4,
69 ISCSI_INFINIBAND = 5,
70 };
71
72 /* RFC-3720 7.1.4 Standard Connection State Diagram for a Target */
73 enum target_conn_state_table {
74 TARG_CONN_STATE_FREE = 0x1,
75 TARG_CONN_STATE_XPT_UP = 0x3,
76 TARG_CONN_STATE_IN_LOGIN = 0x4,
77 TARG_CONN_STATE_LOGGED_IN = 0x5,
78 TARG_CONN_STATE_IN_LOGOUT = 0x6,
79 TARG_CONN_STATE_LOGOUT_REQUESTED = 0x7,
80 TARG_CONN_STATE_CLEANUP_WAIT = 0x8,
81 };
82
83 /* RFC-3720 7.3.2 Session State Diagram for a Target */
84 enum target_sess_state_table {
85 TARG_SESS_STATE_FREE = 0x1,
86 TARG_SESS_STATE_ACTIVE = 0x2,
87 TARG_SESS_STATE_LOGGED_IN = 0x3,
88 TARG_SESS_STATE_FAILED = 0x4,
89 TARG_SESS_STATE_IN_CONTINUE = 0x5,
90 };
91
92 /* struct iscsi_data_count->type */
93 enum data_count_type {
94 ISCSI_RX_DATA = 1,
95 ISCSI_TX_DATA = 2,
96 };
97
98 /* struct iscsi_datain_req->dr_complete */
99 enum datain_req_comp_table {
100 DATAIN_COMPLETE_NORMAL = 1,
101 DATAIN_COMPLETE_WITHIN_COMMAND_RECOVERY = 2,
102 DATAIN_COMPLETE_CONNECTION_RECOVERY = 3,
103 };
104
105 /* struct iscsi_datain_req->recovery */
106 enum datain_req_rec_table {
107 DATAIN_WITHIN_COMMAND_RECOVERY = 1,
108 DATAIN_CONNECTION_RECOVERY = 2,
109 };
110
111 /* struct iscsi_portal_group->state */
112 enum tpg_state_table {
113 TPG_STATE_FREE = 0,
114 TPG_STATE_ACTIVE = 1,
115 TPG_STATE_INACTIVE = 2,
116 TPG_STATE_COLD_RESET = 3,
117 };
118
119 /* struct iscsi_tiqn->tiqn_state */
120 enum tiqn_state_table {
121 TIQN_STATE_ACTIVE = 1,
122 TIQN_STATE_SHUTDOWN = 2,
123 };
124
125 /* struct iscsi_cmd->cmd_flags */
126 enum cmd_flags_table {
127 ICF_GOT_LAST_DATAOUT = 0x00000001,
128 ICF_GOT_DATACK_SNACK = 0x00000002,
129 ICF_NON_IMMEDIATE_UNSOLICITED_DATA = 0x00000004,
130 ICF_SENT_LAST_R2T = 0x00000008,
131 ICF_WITHIN_COMMAND_RECOVERY = 0x00000010,
132 ICF_CONTIG_MEMORY = 0x00000020,
133 ICF_ATTACHED_TO_RQUEUE = 0x00000040,
134 ICF_OOO_CMDSN = 0x00000080,
135 ICF_REJECT_FAIL_CONN = 0x00000100,
136 };
137
138 /* struct iscsi_cmd->i_state */
139 enum cmd_i_state_table {
140 ISTATE_NO_STATE = 0,
141 ISTATE_NEW_CMD = 1,
142 ISTATE_DEFERRED_CMD = 2,
143 ISTATE_UNSOLICITED_DATA = 3,
144 ISTATE_RECEIVE_DATAOUT = 4,
145 ISTATE_RECEIVE_DATAOUT_RECOVERY = 5,
146 ISTATE_RECEIVED_LAST_DATAOUT = 6,
147 ISTATE_WITHIN_DATAOUT_RECOVERY = 7,
148 ISTATE_IN_CONNECTION_RECOVERY = 8,
149 ISTATE_RECEIVED_TASKMGT = 9,
150 ISTATE_SEND_ASYNCMSG = 10,
151 ISTATE_SENT_ASYNCMSG = 11,
152 ISTATE_SEND_DATAIN = 12,
153 ISTATE_SEND_LAST_DATAIN = 13,
154 ISTATE_SENT_LAST_DATAIN = 14,
155 ISTATE_SEND_LOGOUTRSP = 15,
156 ISTATE_SENT_LOGOUTRSP = 16,
157 ISTATE_SEND_NOPIN = 17,
158 ISTATE_SENT_NOPIN = 18,
159 ISTATE_SEND_REJECT = 19,
160 ISTATE_SENT_REJECT = 20,
161 ISTATE_SEND_R2T = 21,
162 ISTATE_SENT_R2T = 22,
163 ISTATE_SEND_R2T_RECOVERY = 23,
164 ISTATE_SENT_R2T_RECOVERY = 24,
165 ISTATE_SEND_LAST_R2T = 25,
166 ISTATE_SENT_LAST_R2T = 26,
167 ISTATE_SEND_LAST_R2T_RECOVERY = 27,
168 ISTATE_SENT_LAST_R2T_RECOVERY = 28,
169 ISTATE_SEND_STATUS = 29,
170 ISTATE_SEND_STATUS_BROKEN_PC = 30,
171 ISTATE_SENT_STATUS = 31,
172 ISTATE_SEND_STATUS_RECOVERY = 32,
173 ISTATE_SENT_STATUS_RECOVERY = 33,
174 ISTATE_SEND_TASKMGTRSP = 34,
175 ISTATE_SENT_TASKMGTRSP = 35,
176 ISTATE_SEND_TEXTRSP = 36,
177 ISTATE_SENT_TEXTRSP = 37,
178 ISTATE_SEND_NOPIN_WANT_RESPONSE = 38,
179 ISTATE_SENT_NOPIN_WANT_RESPONSE = 39,
180 ISTATE_SEND_NOPIN_NO_RESPONSE = 40,
181 ISTATE_REMOVE = 41,
182 ISTATE_FREE = 42,
183 };
184
185 /* Used for iscsi_recover_cmdsn() return values */
186 enum recover_cmdsn_ret_table {
187 CMDSN_ERROR_CANNOT_RECOVER = -1,
188 CMDSN_NORMAL_OPERATION = 0,
189 CMDSN_LOWER_THAN_EXP = 1,
190 CMDSN_HIGHER_THAN_EXP = 2,
191 };
192
193 /* Used for iscsi_handle_immediate_data() return values */
194 enum immedate_data_ret_table {
195 IMMEDIATE_DATA_CANNOT_RECOVER = -1,
196 IMMEDIATE_DATA_NORMAL_OPERATION = 0,
197 IMMEDIATE_DATA_ERL1_CRC_FAILURE = 1,
198 };
199
200 /* Used for iscsi_decide_dataout_action() return values */
201 enum dataout_action_ret_table {
202 DATAOUT_CANNOT_RECOVER = -1,
203 DATAOUT_NORMAL = 0,
204 DATAOUT_SEND_R2T = 1,
205 DATAOUT_SEND_TO_TRANSPORT = 2,
206 DATAOUT_WITHIN_COMMAND_RECOVERY = 3,
207 };
208
209 /* Used for struct iscsi_node_auth->naf_flags */
210 enum naf_flags_table {
211 NAF_USERID_SET = 0x01,
212 NAF_PASSWORD_SET = 0x02,
213 NAF_USERID_IN_SET = 0x04,
214 NAF_PASSWORD_IN_SET = 0x08,
215 };
216
217 /* Used by various struct timer_list to manage iSCSI specific state */
218 enum iscsi_timer_flags_table {
219 ISCSI_TF_RUNNING = 0x01,
220 ISCSI_TF_STOP = 0x02,
221 ISCSI_TF_EXPIRED = 0x04,
222 };
223
224 /* Used for struct iscsi_np->np_flags */
225 enum np_flags_table {
226 NPF_IP_NETWORK = 0x00,
227 };
228
229 /* Used for struct iscsi_np->np_thread_state */
230 enum np_thread_state_table {
231 ISCSI_NP_THREAD_ACTIVE = 1,
232 ISCSI_NP_THREAD_INACTIVE = 2,
233 ISCSI_NP_THREAD_RESET = 3,
234 ISCSI_NP_THREAD_SHUTDOWN = 4,
235 ISCSI_NP_THREAD_EXIT = 5,
236 };
237
238 struct iscsi_conn_ops {
239 u8 HeaderDigest; /* [0,1] == [None,CRC32C] */
240 u8 DataDigest; /* [0,1] == [None,CRC32C] */
241 u32 MaxRecvDataSegmentLength; /* [512..2**24-1] */
242 u32 MaxXmitDataSegmentLength; /* [512..2**24-1] */
243 u8 OFMarker; /* [0,1] == [No,Yes] */
244 u8 IFMarker; /* [0,1] == [No,Yes] */
245 u32 OFMarkInt; /* [1..65535] */
246 u32 IFMarkInt; /* [1..65535] */
247 };
248
249 struct iscsi_sess_ops {
250 char InitiatorName[224];
251 char InitiatorAlias[256];
252 char TargetName[224];
253 char TargetAlias[256];
254 char TargetAddress[256];
255 u16 TargetPortalGroupTag; /* [0..65535] */
256 u16 MaxConnections; /* [1..65535] */
257 u8 InitialR2T; /* [0,1] == [No,Yes] */
258 u8 ImmediateData; /* [0,1] == [No,Yes] */
259 u32 MaxBurstLength; /* [512..2**24-1] */
260 u32 FirstBurstLength; /* [512..2**24-1] */
261 u16 DefaultTime2Wait; /* [0..3600] */
262 u16 DefaultTime2Retain; /* [0..3600] */
263 u16 MaxOutstandingR2T; /* [1..65535] */
264 u8 DataPDUInOrder; /* [0,1] == [No,Yes] */
265 u8 DataSequenceInOrder; /* [0,1] == [No,Yes] */
266 u8 ErrorRecoveryLevel; /* [0..2] */
267 u8 SessionType; /* [0,1] == [Normal,Discovery]*/
268 };
269
270 struct iscsi_queue_req {
271 int state;
272 struct iscsi_cmd *cmd;
273 struct list_head qr_list;
274 };
275
276 struct iscsi_data_count {
277 int data_length;
278 int sync_and_steering;
279 enum data_count_type type;
280 u32 iov_count;
281 u32 ss_iov_count;
282 u32 ss_marker_count;
283 struct kvec *iov;
284 };
285
286 struct iscsi_param_list {
287 struct list_head param_list;
288 struct list_head extra_response_list;
289 };
290
291 struct iscsi_datain_req {
292 enum datain_req_comp_table dr_complete;
293 int generate_recovery_values;
294 enum datain_req_rec_table recovery;
295 u32 begrun;
296 u32 runlength;
297 u32 data_length;
298 u32 data_offset;
299 u32 data_sn;
300 u32 next_burst_len;
301 u32 read_data_done;
302 u32 seq_send_order;
303 struct list_head cmd_datain_node;
304 } ____cacheline_aligned;
305
306 struct iscsi_ooo_cmdsn {
307 u16 cid;
308 u32 batch_count;
309 u32 cmdsn;
310 u32 exp_cmdsn;
311 struct iscsi_cmd *cmd;
312 struct list_head ooo_list;
313 } ____cacheline_aligned;
314
315 struct iscsi_datain {
316 u8 flags;
317 u32 data_sn;
318 u32 length;
319 u32 offset;
320 } ____cacheline_aligned;
321
322 struct iscsi_r2t {
323 int seq_complete;
324 int recovery_r2t;
325 int sent_r2t;
326 u32 r2t_sn;
327 u32 offset;
328 u32 targ_xfer_tag;
329 u32 xfer_len;
330 struct list_head r2t_list;
331 } ____cacheline_aligned;
332
333 struct iscsi_cmd {
334 enum iscsi_timer_flags_table dataout_timer_flags;
335 /* DataOUT timeout retries */
336 u8 dataout_timeout_retries;
337 /* Within command recovery count */
338 u8 error_recovery_count;
339 /* iSCSI dependent state for out or order CmdSNs */
340 enum cmd_i_state_table deferred_i_state;
341 /* iSCSI dependent state */
342 enum cmd_i_state_table i_state;
343 /* Command is an immediate command (ISCSI_OP_IMMEDIATE set) */
344 u8 immediate_cmd;
345 /* Immediate data present */
346 u8 immediate_data;
347 /* iSCSI Opcode */
348 u8 iscsi_opcode;
349 /* iSCSI Response Code */
350 u8 iscsi_response;
351 /* Logout reason when iscsi_opcode == ISCSI_INIT_LOGOUT_CMND */
352 u8 logout_reason;
353 /* Logout response code when iscsi_opcode == ISCSI_INIT_LOGOUT_CMND */
354 u8 logout_response;
355 /* MaxCmdSN has been incremented */
356 u8 maxcmdsn_inc;
357 /* Immediate Unsolicited Dataout */
358 u8 unsolicited_data;
359 /* CID contained in logout PDU when opcode == ISCSI_INIT_LOGOUT_CMND */
360 u16 logout_cid;
361 /* Command flags */
362 enum cmd_flags_table cmd_flags;
363 /* Initiator Task Tag assigned from Initiator */
364 itt_t init_task_tag;
365 /* Target Transfer Tag assigned from Target */
366 u32 targ_xfer_tag;
367 /* CmdSN assigned from Initiator */
368 u32 cmd_sn;
369 /* ExpStatSN assigned from Initiator */
370 u32 exp_stat_sn;
371 /* StatSN assigned to this ITT */
372 u32 stat_sn;
373 /* DataSN Counter */
374 u32 data_sn;
375 /* R2TSN Counter */
376 u32 r2t_sn;
377 /* Last DataSN acknowledged via DataAck SNACK */
378 u32 acked_data_sn;
379 /* Used for echoing NOPOUT ping data */
380 u32 buf_ptr_size;
381 /* Used to store DataDigest */
382 u32 data_crc;
383 /* Counter for MaxOutstandingR2T */
384 u32 outstanding_r2ts;
385 /* Next R2T Offset when DataSequenceInOrder=Yes */
386 u32 r2t_offset;
387 /* Iovec current and orig count for iscsi_cmd->iov_data */
388 u32 iov_data_count;
389 u32 orig_iov_data_count;
390 /* Number of miscellaneous iovecs used for IP stack calls */
391 u32 iov_misc_count;
392 /* Number of struct iscsi_pdu in struct iscsi_cmd->pdu_list */
393 u32 pdu_count;
394 /* Next struct iscsi_pdu to send in struct iscsi_cmd->pdu_list */
395 u32 pdu_send_order;
396 /* Current struct iscsi_pdu in struct iscsi_cmd->pdu_list */
397 u32 pdu_start;
398 /* Next struct iscsi_seq to send in struct iscsi_cmd->seq_list */
399 u32 seq_send_order;
400 /* Number of struct iscsi_seq in struct iscsi_cmd->seq_list */
401 u32 seq_count;
402 /* Current struct iscsi_seq in struct iscsi_cmd->seq_list */
403 u32 seq_no;
404 /* Lowest offset in current DataOUT sequence */
405 u32 seq_start_offset;
406 /* Highest offset in current DataOUT sequence */
407 u32 seq_end_offset;
408 /* Total size in bytes received so far of READ data */
409 u32 read_data_done;
410 /* Total size in bytes received so far of WRITE data */
411 u32 write_data_done;
412 /* Counter for FirstBurstLength key */
413 u32 first_burst_len;
414 /* Counter for MaxBurstLength key */
415 u32 next_burst_len;
416 /* Transfer size used for IP stack calls */
417 u32 tx_size;
418 /* Buffer used for various purposes */
419 void *buf_ptr;
420 /* See include/linux/dma-mapping.h */
421 enum dma_data_direction data_direction;
422 /* iSCSI PDU Header + CRC */
423 unsigned char pdu[ISCSI_HDR_LEN + ISCSI_CRC_LEN];
424 /* Number of times struct iscsi_cmd is present in immediate queue */
425 atomic_t immed_queue_count;
426 atomic_t response_queue_count;
427 spinlock_t datain_lock;
428 spinlock_t dataout_timeout_lock;
429 /* spinlock for protecting struct iscsi_cmd->i_state */
430 spinlock_t istate_lock;
431 /* spinlock for adding within command recovery entries */
432 spinlock_t error_lock;
433 /* spinlock for adding R2Ts */
434 spinlock_t r2t_lock;
435 /* DataIN List */
436 struct list_head datain_list;
437 /* R2T List */
438 struct list_head cmd_r2t_list;
439 struct completion reject_comp;
440 /* Timer for DataOUT */
441 struct timer_list dataout_timer;
442 /* Iovecs for SCSI data payload RX/TX w/ kernel level sockets */
443 struct kvec *iov_data;
444 /* Iovecs for miscellaneous purposes */
445 #define ISCSI_MISC_IOVECS 5
446 struct kvec iov_misc[ISCSI_MISC_IOVECS];
447 /* Array of struct iscsi_pdu used for DataPDUInOrder=No */
448 struct iscsi_pdu *pdu_list;
449 /* Current struct iscsi_pdu used for DataPDUInOrder=No */
450 struct iscsi_pdu *pdu_ptr;
451 /* Array of struct iscsi_seq used for DataSequenceInOrder=No */
452 struct iscsi_seq *seq_list;
453 /* Current struct iscsi_seq used for DataSequenceInOrder=No */
454 struct iscsi_seq *seq_ptr;
455 /* TMR Request when iscsi_opcode == ISCSI_OP_SCSI_TMFUNC */
456 struct iscsi_tmr_req *tmr_req;
457 /* Connection this command is alligient to */
458 struct iscsi_conn *conn;
459 /* Pointer to connection recovery entry */
460 struct iscsi_conn_recovery *cr;
461 /* Session the command is part of, used for connection recovery */
462 struct iscsi_session *sess;
463 /* list_head for connection list */
464 struct list_head i_conn_node;
465 /* The TCM I/O descriptor that is accessed via container_of() */
466 struct se_cmd se_cmd;
467 /* Sense buffer that will be mapped into outgoing status */
468 #define ISCSI_SENSE_BUFFER_LEN (TRANSPORT_SENSE_BUFFER + 2)
469 unsigned char sense_buffer[ISCSI_SENSE_BUFFER_LEN];
470
471 u32 padding;
472 u8 pad_bytes[4];
473
474 struct scatterlist *first_data_sg;
475 u32 first_data_sg_off;
476 u32 kmapped_nents;
477 sense_reason_t sense_reason;
478 } ____cacheline_aligned;
479
480 struct iscsi_tmr_req {
481 bool task_reassign:1;
482 u32 exp_data_sn;
483 struct iscsi_cmd *ref_cmd;
484 struct iscsi_conn_recovery *conn_recovery;
485 struct se_tmr_req *se_tmr_req;
486 };
487
488 struct iscsi_conn {
489 wait_queue_head_t queues_wq;
490 /* Authentication Successful for this connection */
491 u8 auth_complete;
492 /* State connection is currently in */
493 u8 conn_state;
494 u8 conn_logout_reason;
495 u8 network_transport;
496 enum iscsi_timer_flags_table nopin_timer_flags;
497 enum iscsi_timer_flags_table nopin_response_timer_flags;
498 /* Used to know what thread encountered a transport failure */
499 u8 which_thread;
500 /* connection id assigned by the Initiator */
501 u16 cid;
502 /* Remote TCP Port */
503 u16 login_port;
504 u16 local_port;
505 int net_size;
506 u32 auth_id;
507 u32 conn_flags;
508 /* Used for iscsi_tx_login_rsp() */
509 itt_t login_itt;
510 u32 exp_statsn;
511 /* Per connection status sequence number */
512 u32 stat_sn;
513 /* IFMarkInt's Current Value */
514 u32 if_marker;
515 /* OFMarkInt's Current Value */
516 u32 of_marker;
517 /* Used for calculating OFMarker offset to next PDU */
518 u32 of_marker_offset;
519 /* Complete Bad PDU for sending reject */
520 unsigned char bad_hdr[ISCSI_HDR_LEN];
521 #define IPV6_ADDRESS_SPACE 48
522 unsigned char login_ip[IPV6_ADDRESS_SPACE];
523 unsigned char local_ip[IPV6_ADDRESS_SPACE];
524 int conn_usage_count;
525 int conn_waiting_on_uc;
526 atomic_t check_immediate_queue;
527 atomic_t conn_logout_remove;
528 atomic_t connection_exit;
529 atomic_t connection_recovery;
530 atomic_t connection_reinstatement;
531 atomic_t connection_wait_rcfr;
532 atomic_t sleep_on_conn_wait_comp;
533 atomic_t transport_failed;
534 struct completion conn_post_wait_comp;
535 struct completion conn_wait_comp;
536 struct completion conn_wait_rcfr_comp;
537 struct completion conn_waiting_on_uc_comp;
538 struct completion conn_logout_comp;
539 struct completion tx_half_close_comp;
540 struct completion rx_half_close_comp;
541 /* socket used by this connection */
542 struct socket *sock;
543 struct timer_list nopin_timer;
544 struct timer_list nopin_response_timer;
545 struct timer_list transport_timer;
546 /* Spinlock used for add/deleting cmd's from conn_cmd_list */
547 spinlock_t cmd_lock;
548 spinlock_t conn_usage_lock;
549 spinlock_t immed_queue_lock;
550 spinlock_t nopin_timer_lock;
551 spinlock_t response_queue_lock;
552 spinlock_t state_lock;
553 /* libcrypto RX and TX contexts for crc32c */
554 struct hash_desc conn_rx_hash;
555 struct hash_desc conn_tx_hash;
556 /* Used for scheduling TX and RX connection kthreads */
557 cpumask_var_t conn_cpumask;
558 unsigned int conn_rx_reset_cpumask:1;
559 unsigned int conn_tx_reset_cpumask:1;
560 /* list_head of struct iscsi_cmd for this connection */
561 struct list_head conn_cmd_list;
562 struct list_head immed_queue_list;
563 struct list_head response_queue_list;
564 struct iscsi_conn_ops *conn_ops;
565 struct iscsi_param_list *param_list;
566 /* Used for per connection auth state machine */
567 void *auth_protocol;
568 struct iscsi_login_thread_s *login_thread;
569 struct iscsi_portal_group *tpg;
570 /* Pointer to parent session */
571 struct iscsi_session *sess;
572 /* Pointer to thread_set in use for this conn's threads */
573 struct iscsi_thread_set *thread_set;
574 /* list_head for session connection list */
575 struct list_head conn_list;
576 } ____cacheline_aligned;
577
578 struct iscsi_conn_recovery {
579 u16 cid;
580 u32 cmd_count;
581 u32 maxrecvdatasegmentlength;
582 u32 maxxmitdatasegmentlength;
583 int ready_for_reallegiance;
584 struct list_head conn_recovery_cmd_list;
585 spinlock_t conn_recovery_cmd_lock;
586 struct timer_list time2retain_timer;
587 struct iscsi_session *sess;
588 struct list_head cr_list;
589 } ____cacheline_aligned;
590
591 struct iscsi_session {
592 u8 initiator_vendor;
593 u8 isid[6];
594 enum iscsi_timer_flags_table time2retain_timer_flags;
595 u8 version_active;
596 u16 cid_called;
597 u16 conn_recovery_count;
598 u16 tsih;
599 /* state session is currently in */
600 u32 session_state;
601 /* session wide counter: initiator assigned task tag */
602 itt_t init_task_tag;
603 /* session wide counter: target assigned task tag */
604 u32 targ_xfer_tag;
605 u32 cmdsn_window;
606
607 /* protects cmdsn values */
608 struct mutex cmdsn_mutex;
609 /* session wide counter: expected command sequence number */
610 u32 exp_cmd_sn;
611 /* session wide counter: maximum allowed command sequence number */
612 u32 max_cmd_sn;
613 struct list_head sess_ooo_cmdsn_list;
614
615 /* LIO specific session ID */
616 u32 sid;
617 char auth_type[8];
618 /* unique within the target */
619 int session_index;
620 /* Used for session reference counting */
621 int session_usage_count;
622 int session_waiting_on_uc;
623 u32 cmd_pdus;
624 u32 rsp_pdus;
625 u64 tx_data_octets;
626 u64 rx_data_octets;
627 u32 conn_digest_errors;
628 u32 conn_timeout_errors;
629 u64 creation_time;
630 spinlock_t session_stats_lock;
631 /* Number of active connections */
632 atomic_t nconn;
633 atomic_t session_continuation;
634 atomic_t session_fall_back_to_erl0;
635 atomic_t session_logout;
636 atomic_t session_reinstatement;
637 atomic_t session_stop_active;
638 atomic_t sleep_on_sess_wait_comp;
639 /* connection list */
640 struct list_head sess_conn_list;
641 struct list_head cr_active_list;
642 struct list_head cr_inactive_list;
643 spinlock_t conn_lock;
644 spinlock_t cr_a_lock;
645 spinlock_t cr_i_lock;
646 spinlock_t session_usage_lock;
647 spinlock_t ttt_lock;
648 struct completion async_msg_comp;
649 struct completion reinstatement_comp;
650 struct completion session_wait_comp;
651 struct completion session_waiting_on_uc_comp;
652 struct timer_list time2retain_timer;
653 struct iscsi_sess_ops *sess_ops;
654 struct se_session *se_sess;
655 struct iscsi_portal_group *tpg;
656 } ____cacheline_aligned;
657
658 struct iscsi_login {
659 u8 auth_complete;
660 u8 checked_for_existing;
661 u8 current_stage;
662 u8 leading_connection;
663 u8 first_request;
664 u8 version_min;
665 u8 version_max;
666 char isid[6];
667 u32 cmd_sn;
668 itt_t init_task_tag;
669 u32 initial_exp_statsn;
670 u32 rsp_length;
671 u16 cid;
672 u16 tsih;
673 char *req;
674 char *rsp;
675 char *req_buf;
676 char *rsp_buf;
677 } ____cacheline_aligned;
678
679 struct iscsi_node_attrib {
680 u32 dataout_timeout;
681 u32 dataout_timeout_retries;
682 u32 default_erl;
683 u32 nopin_timeout;
684 u32 nopin_response_timeout;
685 u32 random_datain_pdu_offsets;
686 u32 random_datain_seq_offsets;
687 u32 random_r2t_offsets;
688 u32 tmr_cold_reset;
689 u32 tmr_warm_reset;
690 struct iscsi_node_acl *nacl;
691 };
692
693 struct se_dev_entry_s;
694
695 struct iscsi_node_auth {
696 enum naf_flags_table naf_flags;
697 int authenticate_target;
698 /* Used for iscsit_global->discovery_auth,
699 * set to zero (auth disabled) by default */
700 int enforce_discovery_auth;
701 #define MAX_USER_LEN 256
702 #define MAX_PASS_LEN 256
703 char userid[MAX_USER_LEN];
704 char password[MAX_PASS_LEN];
705 char userid_mutual[MAX_USER_LEN];
706 char password_mutual[MAX_PASS_LEN];
707 };
708
709 #include "iscsi_target_stat.h"
710
711 struct iscsi_node_stat_grps {
712 struct config_group iscsi_sess_stats_group;
713 struct config_group iscsi_conn_stats_group;
714 };
715
716 struct iscsi_node_acl {
717 struct iscsi_node_attrib node_attrib;
718 struct iscsi_node_auth node_auth;
719 struct iscsi_node_stat_grps node_stat_grps;
720 struct se_node_acl se_node_acl;
721 };
722
723 #define NODE_STAT_GRPS(nacl) (&(nacl)->node_stat_grps)
724
725 #define ISCSI_NODE_ATTRIB(t) (&(t)->node_attrib)
726 #define ISCSI_NODE_AUTH(t) (&(t)->node_auth)
727
728 struct iscsi_tpg_attrib {
729 u32 authentication;
730 u32 login_timeout;
731 u32 netif_timeout;
732 u32 generate_node_acls;
733 u32 cache_dynamic_acls;
734 u32 default_cmdsn_depth;
735 u32 demo_mode_write_protect;
736 u32 prod_mode_write_protect;
737 struct iscsi_portal_group *tpg;
738 };
739
740 struct iscsi_np {
741 int np_network_transport;
742 int np_ip_proto;
743 int np_sock_type;
744 enum np_thread_state_table np_thread_state;
745 enum iscsi_timer_flags_table np_login_timer_flags;
746 u32 np_exports;
747 enum np_flags_table np_flags;
748 unsigned char np_ip[IPV6_ADDRESS_SPACE];
749 u16 np_port;
750 spinlock_t np_thread_lock;
751 struct completion np_restart_comp;
752 struct socket *np_socket;
753 struct __kernel_sockaddr_storage np_sockaddr;
754 struct task_struct *np_thread;
755 struct timer_list np_login_timer;
756 struct iscsi_portal_group *np_login_tpg;
757 struct list_head np_list;
758 } ____cacheline_aligned;
759
760 struct iscsi_tpg_np {
761 struct iscsi_np *tpg_np;
762 struct iscsi_portal_group *tpg;
763 struct iscsi_tpg_np *tpg_np_parent;
764 struct list_head tpg_np_list;
765 struct list_head tpg_np_child_list;
766 struct list_head tpg_np_parent_list;
767 struct se_tpg_np se_tpg_np;
768 spinlock_t tpg_np_parent_lock;
769 };
770
771 struct iscsi_portal_group {
772 unsigned char tpg_chap_id;
773 /* TPG State */
774 enum tpg_state_table tpg_state;
775 /* Target Portal Group Tag */
776 u16 tpgt;
777 /* Id assigned to target sessions */
778 u16 ntsih;
779 /* Number of active sessions */
780 u32 nsessions;
781 /* Number of Network Portals available for this TPG */
782 u32 num_tpg_nps;
783 /* Per TPG LIO specific session ID. */
784 u32 sid;
785 /* Spinlock for adding/removing Network Portals */
786 spinlock_t tpg_np_lock;
787 spinlock_t tpg_state_lock;
788 struct se_portal_group tpg_se_tpg;
789 struct mutex tpg_access_lock;
790 struct mutex np_login_lock;
791 struct iscsi_tpg_attrib tpg_attrib;
792 /* Pointer to default list of iSCSI parameters for TPG */
793 struct iscsi_param_list *param_list;
794 struct iscsi_tiqn *tpg_tiqn;
795 struct list_head tpg_gnp_list;
796 struct list_head tpg_list;
797 } ____cacheline_aligned;
798
799 #define ISCSI_TPG_C(c) ((struct iscsi_portal_group *)(c)->tpg)
800 #define ISCSI_TPG_LUN(c, l) ((iscsi_tpg_list_t *)(c)->tpg->tpg_lun_list_t[l])
801 #define ISCSI_TPG_S(s) ((struct iscsi_portal_group *)(s)->tpg)
802 #define ISCSI_TPG_ATTRIB(t) (&(t)->tpg_attrib)
803 #define SE_TPG(tpg) (&(tpg)->tpg_se_tpg)
804
805 struct iscsi_wwn_stat_grps {
806 struct config_group iscsi_stat_group;
807 struct config_group iscsi_instance_group;
808 struct config_group iscsi_sess_err_group;
809 struct config_group iscsi_tgt_attr_group;
810 struct config_group iscsi_login_stats_group;
811 struct config_group iscsi_logout_stats_group;
812 };
813
814 struct iscsi_tiqn {
815 #define ISCSI_IQN_LEN 224
816 unsigned char tiqn[ISCSI_IQN_LEN];
817 enum tiqn_state_table tiqn_state;
818 int tiqn_access_count;
819 u32 tiqn_active_tpgs;
820 u32 tiqn_ntpgs;
821 u32 tiqn_num_tpg_nps;
822 u32 tiqn_nsessions;
823 struct list_head tiqn_list;
824 struct list_head tiqn_tpg_list;
825 spinlock_t tiqn_state_lock;
826 spinlock_t tiqn_tpg_lock;
827 struct se_wwn tiqn_wwn;
828 struct iscsi_wwn_stat_grps tiqn_stat_grps;
829 int tiqn_index;
830 struct iscsi_sess_err_stats sess_err_stats;
831 struct iscsi_login_stats login_stats;
832 struct iscsi_logout_stats logout_stats;
833 } ____cacheline_aligned;
834
835 #define WWN_STAT_GRPS(tiqn) (&(tiqn)->tiqn_stat_grps)
836
837 struct iscsit_global {
838 /* In core shutdown */
839 u32 in_shutdown;
840 u32 active_ts;
841 /* Unique identifier used for the authentication daemon */
842 u32 auth_id;
843 u32 inactive_ts;
844 /* Thread Set bitmap count */
845 int ts_bitmap_count;
846 /* Thread Set bitmap pointer */
847 unsigned long *ts_bitmap;
848 /* Used for iSCSI discovery session authentication */
849 struct iscsi_node_acl discovery_acl;
850 struct iscsi_portal_group *discovery_tpg;
851 };
852
853 #endif /* ISCSI_TARGET_CORE_H */