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target: Cleanup unused target_core_base.h bits
[deliverable/linux.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-rc1"
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 5
29 #define NA_NOPIN_TIMEOUT_MAX 60
30 #define NA_NOPIN_TIMEOUT_MIN 3
31 #define NA_NOPIN_RESPONSE_TIMEOUT 5
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 NPF_SCTP_STRUCT_FILE = 0x01 /* Bugfix */
228 };
229
230 /* Used for struct iscsi_np->np_thread_state */
231 enum np_thread_state_table {
232 ISCSI_NP_THREAD_ACTIVE = 1,
233 ISCSI_NP_THREAD_INACTIVE = 2,
234 ISCSI_NP_THREAD_RESET = 3,
235 ISCSI_NP_THREAD_SHUTDOWN = 4,
236 ISCSI_NP_THREAD_EXIT = 5,
237 };
238
239 struct iscsi_conn_ops {
240 u8 HeaderDigest; /* [0,1] == [None,CRC32C] */
241 u8 DataDigest; /* [0,1] == [None,CRC32C] */
242 u32 MaxRecvDataSegmentLength; /* [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_offset_end;
300 u32 data_sn;
301 u32 next_burst_len;
302 u32 read_data_done;
303 u32 seq_send_order;
304 struct list_head dr_list;
305 } ____cacheline_aligned;
306
307 struct iscsi_ooo_cmdsn {
308 u16 cid;
309 u32 batch_count;
310 u32 cmdsn;
311 u32 exp_cmdsn;
312 struct iscsi_cmd *cmd;
313 struct list_head ooo_list;
314 } ____cacheline_aligned;
315
316 struct iscsi_datain {
317 u8 flags;
318 u32 data_sn;
319 u32 length;
320 u32 offset;
321 } ____cacheline_aligned;
322
323 struct iscsi_r2t {
324 int seq_complete;
325 int recovery_r2t;
326 int sent_r2t;
327 u32 r2t_sn;
328 u32 offset;
329 u32 targ_xfer_tag;
330 u32 xfer_len;
331 struct list_head r2t_list;
332 } ____cacheline_aligned;
333
334 struct iscsi_cmd {
335 enum iscsi_timer_flags_table dataout_timer_flags;
336 /* DataOUT timeout retries */
337 u8 dataout_timeout_retries;
338 /* Within command recovery count */
339 u8 error_recovery_count;
340 /* iSCSI dependent state for out or order CmdSNs */
341 enum cmd_i_state_table deferred_i_state;
342 /* iSCSI dependent state */
343 enum cmd_i_state_table i_state;
344 /* Command is an immediate command (ISCSI_OP_IMMEDIATE set) */
345 u8 immediate_cmd;
346 /* Immediate data present */
347 u8 immediate_data;
348 /* iSCSI Opcode */
349 u8 iscsi_opcode;
350 /* iSCSI Response Code */
351 u8 iscsi_response;
352 /* Logout reason when iscsi_opcode == ISCSI_INIT_LOGOUT_CMND */
353 u8 logout_reason;
354 /* Logout response code when iscsi_opcode == ISCSI_INIT_LOGOUT_CMND */
355 u8 logout_response;
356 /* MaxCmdSN has been incremented */
357 u8 maxcmdsn_inc;
358 /* Immediate Unsolicited Dataout */
359 u8 unsolicited_data;
360 /* CID contained in logout PDU when opcode == ISCSI_INIT_LOGOUT_CMND */
361 u16 logout_cid;
362 /* Command flags */
363 enum cmd_flags_table cmd_flags;
364 /* Initiator Task Tag assigned from Initiator */
365 u32 init_task_tag;
366 /* Target Transfer Tag assigned from Target */
367 u32 targ_xfer_tag;
368 /* CmdSN assigned from Initiator */
369 u32 cmd_sn;
370 /* ExpStatSN assigned from Initiator */
371 u32 exp_stat_sn;
372 /* StatSN assigned to this ITT */
373 u32 stat_sn;
374 /* DataSN Counter */
375 u32 data_sn;
376 /* R2TSN Counter */
377 u32 r2t_sn;
378 /* Last DataSN acknowledged via DataAck SNACK */
379 u32 acked_data_sn;
380 /* Used for echoing NOPOUT ping data */
381 u32 buf_ptr_size;
382 /* Used to store DataDigest */
383 u32 data_crc;
384 /* Total size in bytes associated with command */
385 u32 data_length;
386 /* Counter for MaxOutstandingR2T */
387 u32 outstanding_r2ts;
388 /* Next R2T Offset when DataSequenceInOrder=Yes */
389 u32 r2t_offset;
390 /* Iovec current and orig count for iscsi_cmd->iov_data */
391 u32 iov_data_count;
392 u32 orig_iov_data_count;
393 /* Number of miscellaneous iovecs used for IP stack calls */
394 u32 iov_misc_count;
395 /* Number of struct iscsi_pdu in struct iscsi_cmd->pdu_list */
396 u32 pdu_count;
397 /* Next struct iscsi_pdu to send in struct iscsi_cmd->pdu_list */
398 u32 pdu_send_order;
399 /* Current struct iscsi_pdu in struct iscsi_cmd->pdu_list */
400 u32 pdu_start;
401 u32 residual_count;
402 /* Next struct iscsi_seq to send in struct iscsi_cmd->seq_list */
403 u32 seq_send_order;
404 /* Number of struct iscsi_seq in struct iscsi_cmd->seq_list */
405 u32 seq_count;
406 /* Current struct iscsi_seq in struct iscsi_cmd->seq_list */
407 u32 seq_no;
408 /* Lowest offset in current DataOUT sequence */
409 u32 seq_start_offset;
410 /* Highest offset in current DataOUT sequence */
411 u32 seq_end_offset;
412 /* Total size in bytes received so far of READ data */
413 u32 read_data_done;
414 /* Total size in bytes received so far of WRITE data */
415 u32 write_data_done;
416 /* Counter for FirstBurstLength key */
417 u32 first_burst_len;
418 /* Counter for MaxBurstLength key */
419 u32 next_burst_len;
420 /* Transfer size used for IP stack calls */
421 u32 tx_size;
422 /* Buffer used for various purposes */
423 void *buf_ptr;
424 /* See include/linux/dma-mapping.h */
425 enum dma_data_direction data_direction;
426 /* iSCSI PDU Header + CRC */
427 unsigned char pdu[ISCSI_HDR_LEN + ISCSI_CRC_LEN];
428 /* Number of times struct iscsi_cmd is present in immediate queue */
429 atomic_t immed_queue_count;
430 atomic_t response_queue_count;
431 atomic_t transport_sent;
432 spinlock_t datain_lock;
433 spinlock_t dataout_timeout_lock;
434 /* spinlock for protecting struct iscsi_cmd->i_state */
435 spinlock_t istate_lock;
436 /* spinlock for adding within command recovery entries */
437 spinlock_t error_lock;
438 /* spinlock for adding R2Ts */
439 spinlock_t r2t_lock;
440 /* DataIN List */
441 struct list_head datain_list;
442 /* R2T List */
443 struct list_head cmd_r2t_list;
444 struct completion reject_comp;
445 /* Timer for DataOUT */
446 struct timer_list dataout_timer;
447 /* Iovecs for SCSI data payload RX/TX w/ kernel level sockets */
448 struct kvec *iov_data;
449 /* Iovecs for miscellaneous purposes */
450 #define ISCSI_MISC_IOVECS 5
451 struct kvec iov_misc[ISCSI_MISC_IOVECS];
452 /* Array of struct iscsi_pdu used for DataPDUInOrder=No */
453 struct iscsi_pdu *pdu_list;
454 /* Current struct iscsi_pdu used for DataPDUInOrder=No */
455 struct iscsi_pdu *pdu_ptr;
456 /* Array of struct iscsi_seq used for DataSequenceInOrder=No */
457 struct iscsi_seq *seq_list;
458 /* Current struct iscsi_seq used for DataSequenceInOrder=No */
459 struct iscsi_seq *seq_ptr;
460 /* TMR Request when iscsi_opcode == ISCSI_OP_SCSI_TMFUNC */
461 struct iscsi_tmr_req *tmr_req;
462 /* Connection this command is alligient to */
463 struct iscsi_conn *conn;
464 /* Pointer to connection recovery entry */
465 struct iscsi_conn_recovery *cr;
466 /* Session the command is part of, used for connection recovery */
467 struct iscsi_session *sess;
468 /* list_head for connection list */
469 struct list_head i_list;
470 /* The TCM I/O descriptor that is accessed via container_of() */
471 struct se_cmd se_cmd;
472 /* Sense buffer that will be mapped into outgoing status */
473 #define ISCSI_SENSE_BUFFER_LEN (TRANSPORT_SENSE_BUFFER + 2)
474 unsigned char sense_buffer[ISCSI_SENSE_BUFFER_LEN];
475
476 struct scatterlist *t_mem_sg;
477 u32 t_mem_sg_nents;
478
479 u32 padding;
480 u8 pad_bytes[4];
481
482 struct scatterlist *first_data_sg;
483 u32 first_data_sg_off;
484 u32 kmapped_nents;
485
486 } ____cacheline_aligned;
487
488 struct iscsi_tmr_req {
489 bool task_reassign:1;
490 u32 ref_cmd_sn;
491 u32 exp_data_sn;
492 struct iscsi_conn_recovery *conn_recovery;
493 struct se_tmr_req *se_tmr_req;
494 };
495
496 struct iscsi_conn {
497 /* Authentication Successful for this connection */
498 u8 auth_complete;
499 /* State connection is currently in */
500 u8 conn_state;
501 u8 conn_logout_reason;
502 u8 network_transport;
503 enum iscsi_timer_flags_table nopin_timer_flags;
504 enum iscsi_timer_flags_table nopin_response_timer_flags;
505 u8 tx_immediate_queue;
506 u8 tx_response_queue;
507 /* Used to know what thread encountered a transport failure */
508 u8 which_thread;
509 /* connection id assigned by the Initiator */
510 u16 cid;
511 /* Remote TCP Port */
512 u16 login_port;
513 int net_size;
514 u32 auth_id;
515 #define CONNFLAG_SCTP_STRUCT_FILE 0x01
516 u32 conn_flags;
517 /* Used for iscsi_tx_login_rsp() */
518 u32 login_itt;
519 u32 exp_statsn;
520 /* Per connection status sequence number */
521 u32 stat_sn;
522 /* IFMarkInt's Current Value */
523 u32 if_marker;
524 /* OFMarkInt's Current Value */
525 u32 of_marker;
526 /* Used for calculating OFMarker offset to next PDU */
527 u32 of_marker_offset;
528 /* Complete Bad PDU for sending reject */
529 unsigned char bad_hdr[ISCSI_HDR_LEN];
530 #define IPV6_ADDRESS_SPACE 48
531 unsigned char login_ip[IPV6_ADDRESS_SPACE];
532 int conn_usage_count;
533 int conn_waiting_on_uc;
534 atomic_t check_immediate_queue;
535 atomic_t conn_logout_remove;
536 atomic_t connection_exit;
537 atomic_t connection_recovery;
538 atomic_t connection_reinstatement;
539 atomic_t connection_wait;
540 atomic_t connection_wait_rcfr;
541 atomic_t sleep_on_conn_wait_comp;
542 atomic_t transport_failed;
543 struct completion conn_post_wait_comp;
544 struct completion conn_wait_comp;
545 struct completion conn_wait_rcfr_comp;
546 struct completion conn_waiting_on_uc_comp;
547 struct completion conn_logout_comp;
548 struct completion tx_half_close_comp;
549 struct completion rx_half_close_comp;
550 /* socket used by this connection */
551 struct socket *sock;
552 struct timer_list nopin_timer;
553 struct timer_list nopin_response_timer;
554 struct timer_list transport_timer;
555 /* Spinlock used for add/deleting cmd's from conn_cmd_list */
556 spinlock_t cmd_lock;
557 spinlock_t conn_usage_lock;
558 spinlock_t immed_queue_lock;
559 spinlock_t nopin_timer_lock;
560 spinlock_t response_queue_lock;
561 spinlock_t state_lock;
562 /* libcrypto RX and TX contexts for crc32c */
563 struct hash_desc conn_rx_hash;
564 struct hash_desc conn_tx_hash;
565 /* Used for scheduling TX and RX connection kthreads */
566 cpumask_var_t conn_cpumask;
567 int conn_rx_reset_cpumask:1;
568 int conn_tx_reset_cpumask:1;
569 /* list_head of struct iscsi_cmd for this connection */
570 struct list_head conn_cmd_list;
571 struct list_head immed_queue_list;
572 struct list_head response_queue_list;
573 struct iscsi_conn_ops *conn_ops;
574 struct iscsi_param_list *param_list;
575 /* Used for per connection auth state machine */
576 void *auth_protocol;
577 struct iscsi_login_thread_s *login_thread;
578 struct iscsi_portal_group *tpg;
579 /* Pointer to parent session */
580 struct iscsi_session *sess;
581 /* Pointer to thread_set in use for this conn's threads */
582 struct iscsi_thread_set *thread_set;
583 /* list_head for session connection list */
584 struct list_head conn_list;
585 } ____cacheline_aligned;
586
587 struct iscsi_conn_recovery {
588 u16 cid;
589 u32 cmd_count;
590 u32 maxrecvdatasegmentlength;
591 int ready_for_reallegiance;
592 struct list_head conn_recovery_cmd_list;
593 spinlock_t conn_recovery_cmd_lock;
594 struct timer_list time2retain_timer;
595 struct iscsi_session *sess;
596 struct list_head cr_list;
597 } ____cacheline_aligned;
598
599 struct iscsi_session {
600 u8 initiator_vendor;
601 u8 isid[6];
602 enum iscsi_timer_flags_table time2retain_timer_flags;
603 u8 version_active;
604 u16 cid_called;
605 u16 conn_recovery_count;
606 u16 tsih;
607 /* state session is currently in */
608 u32 session_state;
609 /* session wide counter: initiator assigned task tag */
610 u32 init_task_tag;
611 /* session wide counter: target assigned task tag */
612 u32 targ_xfer_tag;
613 u32 cmdsn_window;
614
615 /* protects cmdsn values */
616 struct mutex cmdsn_mutex;
617 /* session wide counter: expected command sequence number */
618 u32 exp_cmd_sn;
619 /* session wide counter: maximum allowed command sequence number */
620 u32 max_cmd_sn;
621 struct list_head sess_ooo_cmdsn_list;
622
623 /* LIO specific session ID */
624 u32 sid;
625 char auth_type[8];
626 /* unique within the target */
627 int session_index;
628 /* Used for session reference counting */
629 int session_usage_count;
630 int session_waiting_on_uc;
631 u32 cmd_pdus;
632 u32 rsp_pdus;
633 u64 tx_data_octets;
634 u64 rx_data_octets;
635 u32 conn_digest_errors;
636 u32 conn_timeout_errors;
637 u64 creation_time;
638 spinlock_t session_stats_lock;
639 /* Number of active connections */
640 atomic_t nconn;
641 atomic_t session_continuation;
642 atomic_t session_fall_back_to_erl0;
643 atomic_t session_logout;
644 atomic_t session_reinstatement;
645 atomic_t session_stop_active;
646 atomic_t sleep_on_sess_wait_comp;
647 atomic_t transport_wait_cmds;
648 /* connection list */
649 struct list_head sess_conn_list;
650 struct list_head cr_active_list;
651 struct list_head cr_inactive_list;
652 spinlock_t conn_lock;
653 spinlock_t cr_a_lock;
654 spinlock_t cr_i_lock;
655 spinlock_t session_usage_lock;
656 spinlock_t ttt_lock;
657 struct completion async_msg_comp;
658 struct completion reinstatement_comp;
659 struct completion session_wait_comp;
660 struct completion session_waiting_on_uc_comp;
661 struct timer_list time2retain_timer;
662 struct iscsi_sess_ops *sess_ops;
663 struct se_session *se_sess;
664 struct iscsi_portal_group *tpg;
665 } ____cacheline_aligned;
666
667 struct iscsi_login {
668 u8 auth_complete;
669 u8 checked_for_existing;
670 u8 current_stage;
671 u8 leading_connection;
672 u8 first_request;
673 u8 version_min;
674 u8 version_max;
675 char isid[6];
676 u32 cmd_sn;
677 u32 init_task_tag;
678 u32 initial_exp_statsn;
679 u32 rsp_length;
680 u16 cid;
681 u16 tsih;
682 char *req;
683 char *rsp;
684 char *req_buf;
685 char *rsp_buf;
686 } ____cacheline_aligned;
687
688 struct iscsi_node_attrib {
689 u32 dataout_timeout;
690 u32 dataout_timeout_retries;
691 u32 default_erl;
692 u32 nopin_timeout;
693 u32 nopin_response_timeout;
694 u32 random_datain_pdu_offsets;
695 u32 random_datain_seq_offsets;
696 u32 random_r2t_offsets;
697 u32 tmr_cold_reset;
698 u32 tmr_warm_reset;
699 struct iscsi_node_acl *nacl;
700 };
701
702 struct se_dev_entry_s;
703
704 struct iscsi_node_auth {
705 enum naf_flags_table naf_flags;
706 int authenticate_target;
707 /* Used for iscsit_global->discovery_auth,
708 * set to zero (auth disabled) by default */
709 int enforce_discovery_auth;
710 #define MAX_USER_LEN 256
711 #define MAX_PASS_LEN 256
712 char userid[MAX_USER_LEN];
713 char password[MAX_PASS_LEN];
714 char userid_mutual[MAX_USER_LEN];
715 char password_mutual[MAX_PASS_LEN];
716 };
717
718 #include "iscsi_target_stat.h"
719
720 struct iscsi_node_stat_grps {
721 struct config_group iscsi_sess_stats_group;
722 struct config_group iscsi_conn_stats_group;
723 };
724
725 struct iscsi_node_acl {
726 struct iscsi_node_attrib node_attrib;
727 struct iscsi_node_auth node_auth;
728 struct iscsi_node_stat_grps node_stat_grps;
729 struct se_node_acl se_node_acl;
730 };
731
732 #define NODE_STAT_GRPS(nacl) (&(nacl)->node_stat_grps)
733
734 #define ISCSI_NODE_ATTRIB(t) (&(t)->node_attrib)
735 #define ISCSI_NODE_AUTH(t) (&(t)->node_auth)
736
737 struct iscsi_tpg_attrib {
738 u32 authentication;
739 u32 login_timeout;
740 u32 netif_timeout;
741 u32 generate_node_acls;
742 u32 cache_dynamic_acls;
743 u32 default_cmdsn_depth;
744 u32 demo_mode_write_protect;
745 u32 prod_mode_write_protect;
746 struct iscsi_portal_group *tpg;
747 };
748
749 struct iscsi_np {
750 int np_network_transport;
751 int np_ip_proto;
752 int np_sock_type;
753 enum np_thread_state_table np_thread_state;
754 enum iscsi_timer_flags_table np_login_timer_flags;
755 u32 np_exports;
756 enum np_flags_table np_flags;
757 unsigned char np_ip[IPV6_ADDRESS_SPACE];
758 u16 np_port;
759 spinlock_t np_thread_lock;
760 struct completion np_restart_comp;
761 struct socket *np_socket;
762 struct __kernel_sockaddr_storage np_sockaddr;
763 struct task_struct *np_thread;
764 struct timer_list np_login_timer;
765 struct iscsi_portal_group *np_login_tpg;
766 struct list_head np_list;
767 } ____cacheline_aligned;
768
769 struct iscsi_tpg_np {
770 struct iscsi_np *tpg_np;
771 struct iscsi_portal_group *tpg;
772 struct iscsi_tpg_np *tpg_np_parent;
773 struct list_head tpg_np_list;
774 struct list_head tpg_np_child_list;
775 struct list_head tpg_np_parent_list;
776 struct se_tpg_np se_tpg_np;
777 spinlock_t tpg_np_parent_lock;
778 };
779
780 struct iscsi_portal_group {
781 unsigned char tpg_chap_id;
782 /* TPG State */
783 enum tpg_state_table tpg_state;
784 /* Target Portal Group Tag */
785 u16 tpgt;
786 /* Id assigned to target sessions */
787 u16 ntsih;
788 /* Number of active sessions */
789 u32 nsessions;
790 /* Number of Network Portals available for this TPG */
791 u32 num_tpg_nps;
792 /* Per TPG LIO specific session ID. */
793 u32 sid;
794 /* Spinlock for adding/removing Network Portals */
795 spinlock_t tpg_np_lock;
796 spinlock_t tpg_state_lock;
797 struct se_portal_group tpg_se_tpg;
798 struct mutex tpg_access_lock;
799 struct mutex np_login_lock;
800 struct iscsi_tpg_attrib tpg_attrib;
801 /* Pointer to default list of iSCSI parameters for TPG */
802 struct iscsi_param_list *param_list;
803 struct iscsi_tiqn *tpg_tiqn;
804 struct list_head tpg_gnp_list;
805 struct list_head tpg_list;
806 } ____cacheline_aligned;
807
808 #define ISCSI_TPG_C(c) ((struct iscsi_portal_group *)(c)->tpg)
809 #define ISCSI_TPG_LUN(c, l) ((iscsi_tpg_list_t *)(c)->tpg->tpg_lun_list_t[l])
810 #define ISCSI_TPG_S(s) ((struct iscsi_portal_group *)(s)->tpg)
811 #define ISCSI_TPG_ATTRIB(t) (&(t)->tpg_attrib)
812 #define SE_TPG(tpg) (&(tpg)->tpg_se_tpg)
813
814 struct iscsi_wwn_stat_grps {
815 struct config_group iscsi_stat_group;
816 struct config_group iscsi_instance_group;
817 struct config_group iscsi_sess_err_group;
818 struct config_group iscsi_tgt_attr_group;
819 struct config_group iscsi_login_stats_group;
820 struct config_group iscsi_logout_stats_group;
821 };
822
823 struct iscsi_tiqn {
824 #define ISCSI_IQN_LEN 224
825 unsigned char tiqn[ISCSI_IQN_LEN];
826 enum tiqn_state_table tiqn_state;
827 int tiqn_access_count;
828 u32 tiqn_active_tpgs;
829 u32 tiqn_ntpgs;
830 u32 tiqn_num_tpg_nps;
831 u32 tiqn_nsessions;
832 struct list_head tiqn_list;
833 struct list_head tiqn_tpg_list;
834 spinlock_t tiqn_state_lock;
835 spinlock_t tiqn_tpg_lock;
836 struct se_wwn tiqn_wwn;
837 struct iscsi_wwn_stat_grps tiqn_stat_grps;
838 int tiqn_index;
839 struct iscsi_sess_err_stats sess_err_stats;
840 struct iscsi_login_stats login_stats;
841 struct iscsi_logout_stats logout_stats;
842 } ____cacheline_aligned;
843
844 #define WWN_STAT_GRPS(tiqn) (&(tiqn)->tiqn_stat_grps)
845
846 struct iscsit_global {
847 /* In core shutdown */
848 u32 in_shutdown;
849 u32 active_ts;
850 /* Unique identifier used for the authentication daemon */
851 u32 auth_id;
852 u32 inactive_ts;
853 /* Thread Set bitmap count */
854 int ts_bitmap_count;
855 /* Thread Set bitmap pointer */
856 unsigned long *ts_bitmap;
857 /* Used for iSCSI discovery session authentication */
858 struct iscsi_node_acl discovery_acl;
859 struct iscsi_portal_group *discovery_tpg;
860 };
861
862 #endif /* ISCSI_TARGET_CORE_H */
Linux kernel - Deliverables
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