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Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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linux
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 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
63enum 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 */
73enum 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 */
84enum 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 */
93enum data_count_type {
94 ISCSI_RX_DATA = 1,
95 ISCSI_TX_DATA = 2,
96};
97
98/* struct iscsi_datain_req->dr_complete */
99enum 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 */
106enum datain_req_rec_table {
107 DATAIN_WITHIN_COMMAND_RECOVERY = 1,
108 DATAIN_CONNECTION_RECOVERY = 2,
109};
110
111/* struct iscsi_portal_group->state */
112enum 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 */
120enum tiqn_state_table {
121 TIQN_STATE_ACTIVE = 1,
122 TIQN_STATE_SHUTDOWN = 2,
123};
124
125/* struct iscsi_cmd->cmd_flags */
126enum 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 */
139enum 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 */
186enum 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 */
194enum 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 */
201enum 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 */
210enum 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 */
218enum 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 */
225enum np_flags_table {
226 NPF_IP_NETWORK = 0x00,
227};
228
229/* Used for struct iscsi_np->np_thread_state */
230enum 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
238struct 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 u8 OFMarker; /* [0,1] == [No,Yes] */
243 u8 IFMarker; /* [0,1] == [No,Yes] */
244 u32 OFMarkInt; /* [1..65535] */
245 u32 IFMarkInt; /* [1..65535] */
246};
247
248struct iscsi_sess_ops {
249 char InitiatorName[224];
250 char InitiatorAlias[256];
251 char TargetName[224];
252 char TargetAlias[256];
253 char TargetAddress[256];
254 u16 TargetPortalGroupTag; /* [0..65535] */
255 u16 MaxConnections; /* [1..65535] */
256 u8 InitialR2T; /* [0,1] == [No,Yes] */
257 u8 ImmediateData; /* [0,1] == [No,Yes] */
258 u32 MaxBurstLength; /* [512..2**24-1] */
259 u32 FirstBurstLength; /* [512..2**24-1] */
260 u16 DefaultTime2Wait; /* [0..3600] */
261 u16 DefaultTime2Retain; /* [0..3600] */
262 u16 MaxOutstandingR2T; /* [1..65535] */
263 u8 DataPDUInOrder; /* [0,1] == [No,Yes] */
264 u8 DataSequenceInOrder; /* [0,1] == [No,Yes] */
265 u8 ErrorRecoveryLevel; /* [0..2] */
266 u8 SessionType; /* [0,1] == [Normal,Discovery]*/
267};
268
269struct iscsi_queue_req {
270 int state;
271 struct iscsi_cmd *cmd;
272 struct list_head qr_list;
273};
274
275struct iscsi_data_count {
276 int data_length;
277 int sync_and_steering;
278 enum data_count_type type;
279 u32 iov_count;
280 u32 ss_iov_count;
281 u32 ss_marker_count;
282 struct kvec *iov;
283};
284
285struct iscsi_param_list {
286 struct list_head param_list;
287 struct list_head extra_response_list;
288};
289
290struct iscsi_datain_req {
291 enum datain_req_comp_table dr_complete;
292 int generate_recovery_values;
293 enum datain_req_rec_table recovery;
294 u32 begrun;
295 u32 runlength;
296 u32 data_length;
297 u32 data_offset;
298 u32 data_sn;
299 u32 next_burst_len;
300 u32 read_data_done;
301 u32 seq_send_order;
302 struct list_head cmd_datain_node;
303} ____cacheline_aligned;
304
305struct iscsi_ooo_cmdsn {
306 u16 cid;
307 u32 batch_count;
308 u32 cmdsn;
309 u32 exp_cmdsn;
310 struct iscsi_cmd *cmd;
311 struct list_head ooo_list;
312} ____cacheline_aligned;
313
314struct iscsi_datain {
315 u8 flags;
316 u32 data_sn;
317 u32 length;
318 u32 offset;
319} ____cacheline_aligned;
320
321struct iscsi_r2t {
322 int seq_complete;
323 int recovery_r2t;
324 int sent_r2t;
325 u32 r2t_sn;
326 u32 offset;
327 u32 targ_xfer_tag;
328 u32 xfer_len;
329 struct list_head r2t_list;
330} ____cacheline_aligned;
331
332struct iscsi_cmd {
333 enum iscsi_timer_flags_table dataout_timer_flags;
334 /* DataOUT timeout retries */
335 u8 dataout_timeout_retries;
336 /* Within command recovery count */
337 u8 error_recovery_count;
338 /* iSCSI dependent state for out or order CmdSNs */
339 enum cmd_i_state_table deferred_i_state;
340 /* iSCSI dependent state */
341 enum cmd_i_state_table i_state;
342 /* Command is an immediate command (ISCSI_OP_IMMEDIATE set) */
343 u8 immediate_cmd;
344 /* Immediate data present */
345 u8 immediate_data;
346 /* iSCSI Opcode */
347 u8 iscsi_opcode;
348 /* iSCSI Response Code */
349 u8 iscsi_response;
350 /* Logout reason when iscsi_opcode == ISCSI_INIT_LOGOUT_CMND */
351 u8 logout_reason;
352 /* Logout response code when iscsi_opcode == ISCSI_INIT_LOGOUT_CMND */
353 u8 logout_response;
354 /* MaxCmdSN has been incremented */
355 u8 maxcmdsn_inc;
356 /* Immediate Unsolicited Dataout */
357 u8 unsolicited_data;
358 /* CID contained in logout PDU when opcode == ISCSI_INIT_LOGOUT_CMND */
359 u16 logout_cid;
360 /* Command flags */
361 enum cmd_flags_table cmd_flags;
362 /* Initiator Task Tag assigned from Initiator */
363 u32 init_task_tag;
364 /* Target Transfer Tag assigned from Target */
365 u32 targ_xfer_tag;
366 /* CmdSN assigned from Initiator */
367 u32 cmd_sn;
368 /* ExpStatSN assigned from Initiator */
369 u32 exp_stat_sn;
370 /* StatSN assigned to this ITT */
371 u32 stat_sn;
372 /* DataSN Counter */
373 u32 data_sn;
374 /* R2TSN Counter */
375 u32 r2t_sn;
376 /* Last DataSN acknowledged via DataAck SNACK */
377 u32 acked_data_sn;
378 /* Used for echoing NOPOUT ping data */
379 u32 buf_ptr_size;
380 /* Used to store DataDigest */
381 u32 data_crc;
382 /* Counter for MaxOutstandingR2T */
383 u32 outstanding_r2ts;
384 /* Next R2T Offset when DataSequenceInOrder=Yes */
385 u32 r2t_offset;
386 /* Iovec current and orig count for iscsi_cmd->iov_data */
387 u32 iov_data_count;
388 u32 orig_iov_data_count;
389 /* Number of miscellaneous iovecs used for IP stack calls */
390 u32 iov_misc_count;
391 /* Number of struct iscsi_pdu in struct iscsi_cmd->pdu_list */
392 u32 pdu_count;
393 /* Next struct iscsi_pdu to send in struct iscsi_cmd->pdu_list */
394 u32 pdu_send_order;
395 /* Current struct iscsi_pdu in struct iscsi_cmd->pdu_list */
396 u32 pdu_start;
397 /* Next struct iscsi_seq to send in struct iscsi_cmd->seq_list */
398 u32 seq_send_order;
399 /* Number of struct iscsi_seq in struct iscsi_cmd->seq_list */
400 u32 seq_count;
401 /* Current struct iscsi_seq in struct iscsi_cmd->seq_list */
402 u32 seq_no;
403 /* Lowest offset in current DataOUT sequence */
404 u32 seq_start_offset;
405 /* Highest offset in current DataOUT sequence */
406 u32 seq_end_offset;
407 /* Total size in bytes received so far of READ data */
408 u32 read_data_done;
409 /* Total size in bytes received so far of WRITE data */
410 u32 write_data_done;
411 /* Counter for FirstBurstLength key */
412 u32 first_burst_len;
413 /* Counter for MaxBurstLength key */
414 u32 next_burst_len;
415 /* Transfer size used for IP stack calls */
416 u32 tx_size;
417 /* Buffer used for various purposes */
418 void *buf_ptr;
419 /* See include/linux/dma-mapping.h */
420 enum dma_data_direction data_direction;
421 /* iSCSI PDU Header + CRC */
422 unsigned char pdu[ISCSI_HDR_LEN + ISCSI_CRC_LEN];
423 /* Number of times struct iscsi_cmd is present in immediate queue */
424 atomic_t immed_queue_count;
425 atomic_t response_queue_count;
426 spinlock_t datain_lock;
427 spinlock_t dataout_timeout_lock;
428 /* spinlock for protecting struct iscsi_cmd->i_state */
429 spinlock_t istate_lock;
430 /* spinlock for adding within command recovery entries */
431 spinlock_t error_lock;
432 /* spinlock for adding R2Ts */
433 spinlock_t r2t_lock;
434 /* DataIN List */
435 struct list_head datain_list;
436 /* R2T List */
437 struct list_head cmd_r2t_list;
438 struct completion reject_comp;
439 /* Timer for DataOUT */
440 struct timer_list dataout_timer;
441 /* Iovecs for SCSI data payload RX/TX w/ kernel level sockets */
442 struct kvec *iov_data;
443 /* Iovecs for miscellaneous purposes */
444#define ISCSI_MISC_IOVECS 5
445 struct kvec iov_misc[ISCSI_MISC_IOVECS];
446 /* Array of struct iscsi_pdu used for DataPDUInOrder=No */
447 struct iscsi_pdu *pdu_list;
448 /* Current struct iscsi_pdu used for DataPDUInOrder=No */
449 struct iscsi_pdu *pdu_ptr;
450 /* Array of struct iscsi_seq used for DataSequenceInOrder=No */
451 struct iscsi_seq *seq_list;
452 /* Current struct iscsi_seq used for DataSequenceInOrder=No */
453 struct iscsi_seq *seq_ptr;
454 /* TMR Request when iscsi_opcode == ISCSI_OP_SCSI_TMFUNC */
455 struct iscsi_tmr_req *tmr_req;
456 /* Connection this command is alligient to */
457 struct iscsi_conn *conn;
458 /* Pointer to connection recovery entry */
459 struct iscsi_conn_recovery *cr;
460 /* Session the command is part of, used for connection recovery */
461 struct iscsi_session *sess;
462 /* list_head for connection list */
463 struct list_head i_conn_node;
464 /* The TCM I/O descriptor that is accessed via container_of() */
465 struct se_cmd se_cmd;
466 /* Sense buffer that will be mapped into outgoing status */
467#define ISCSI_SENSE_BUFFER_LEN (TRANSPORT_SENSE_BUFFER + 2)
468 unsigned char sense_buffer[ISCSI_SENSE_BUFFER_LEN];
469
470 u32 padding;
471 u8 pad_bytes[4];
472
473 struct scatterlist *first_data_sg;
474 u32 first_data_sg_off;
475 u32 kmapped_nents;
476
477} ____cacheline_aligned;
478
479struct iscsi_tmr_req {
480 bool task_reassign:1;
481 u32 ref_cmd_sn;
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
488struct iscsi_conn {
489 /* Authentication Successful for this connection */
490 u8 auth_complete;
491 /* State connection is currently in */
492 u8 conn_state;
493 u8 conn_logout_reason;
494 u8 network_transport;
495 enum iscsi_timer_flags_table nopin_timer_flags;
496 enum iscsi_timer_flags_table nopin_response_timer_flags;
497 /* Used to know what thread encountered a transport failure */
498 u8 which_thread;
499 /* connection id assigned by the Initiator */
500 u16 cid;
501 /* Remote TCP Port */
502 u16 login_port;
503 u16 local_port;
504 int net_size;
505 u32 auth_id;
506 u32 conn_flags;
507 /* Used for iscsi_tx_login_rsp() */
508 u32 login_itt;
509 u32 exp_statsn;
510 /* Per connection status sequence number */
511 u32 stat_sn;
512 /* IFMarkInt's Current Value */
513 u32 if_marker;
514 /* OFMarkInt's Current Value */
515 u32 of_marker;
516 /* Used for calculating OFMarker offset to next PDU */
517 u32 of_marker_offset;
518 /* Complete Bad PDU for sending reject */
519 unsigned char bad_hdr[ISCSI_HDR_LEN];
520#define IPV6_ADDRESS_SPACE 48
521 unsigned char login_ip[IPV6_ADDRESS_SPACE];
522 unsigned char local_ip[IPV6_ADDRESS_SPACE];
523 int conn_usage_count;
524 int conn_waiting_on_uc;
525 atomic_t check_immediate_queue;
526 atomic_t conn_logout_remove;
527 atomic_t connection_exit;
528 atomic_t connection_recovery;
529 atomic_t connection_reinstatement;
530 atomic_t connection_wait_rcfr;
531 atomic_t sleep_on_conn_wait_comp;
532 atomic_t transport_failed;
533 struct completion conn_post_wait_comp;
534 struct completion conn_wait_comp;
535 struct completion conn_wait_rcfr_comp;
536 struct completion conn_waiting_on_uc_comp;
537 struct completion conn_logout_comp;
538 struct completion tx_half_close_comp;
539 struct completion rx_half_close_comp;
540 /* socket used by this connection */
541 struct socket *sock;
542 struct timer_list nopin_timer;
543 struct timer_list nopin_response_timer;
544 struct timer_list transport_timer;
545 /* Spinlock used for add/deleting cmd's from conn_cmd_list */
546 spinlock_t cmd_lock;
547 spinlock_t conn_usage_lock;
548 spinlock_t immed_queue_lock;
549 spinlock_t nopin_timer_lock;
550 spinlock_t response_queue_lock;
551 spinlock_t state_lock;
552 /* libcrypto RX and TX contexts for crc32c */
553 struct hash_desc conn_rx_hash;
554 struct hash_desc conn_tx_hash;
555 /* Used for scheduling TX and RX connection kthreads */
556 cpumask_var_t conn_cpumask;
557 unsigned int conn_rx_reset_cpumask:1;
558 unsigned int conn_tx_reset_cpumask:1;
559 /* list_head of struct iscsi_cmd for this connection */
560 struct list_head conn_cmd_list;
561 struct list_head immed_queue_list;
562 struct list_head response_queue_list;
563 struct iscsi_conn_ops *conn_ops;
564 struct iscsi_param_list *param_list;
565 /* Used for per connection auth state machine */
566 void *auth_protocol;
567 struct iscsi_login_thread_s *login_thread;
568 struct iscsi_portal_group *tpg;
569 /* Pointer to parent session */
570 struct iscsi_session *sess;
571 /* Pointer to thread_set in use for this conn's threads */
572 struct iscsi_thread_set *thread_set;
573 /* list_head for session connection list */
574 struct list_head conn_list;
575} ____cacheline_aligned;
576
577struct iscsi_conn_recovery {
578 u16 cid;
579 u32 cmd_count;
580 u32 maxrecvdatasegmentlength;
581 int ready_for_reallegiance;
582 struct list_head conn_recovery_cmd_list;
583 spinlock_t conn_recovery_cmd_lock;
584 struct timer_list time2retain_timer;
585 struct iscsi_session *sess;
586 struct list_head cr_list;
587} ____cacheline_aligned;
588
589struct iscsi_session {
590 u8 initiator_vendor;
591 u8 isid[6];
592 enum iscsi_timer_flags_table time2retain_timer_flags;
593 u8 version_active;
594 u16 cid_called;
595 u16 conn_recovery_count;
596 u16 tsih;
597 /* state session is currently in */
598 u32 session_state;
599 /* session wide counter: initiator assigned task tag */
600 u32 init_task_tag;
601 /* session wide counter: target assigned task tag */
602 u32 targ_xfer_tag;
603 u32 cmdsn_window;
604
605 /* protects cmdsn values */
606 struct mutex cmdsn_mutex;
607 /* session wide counter: expected command sequence number */
608 u32 exp_cmd_sn;
609 /* session wide counter: maximum allowed command sequence number */
610 u32 max_cmd_sn;
611 struct list_head sess_ooo_cmdsn_list;
612
613 /* LIO specific session ID */
614 u32 sid;
615 char auth_type[8];
616 /* unique within the target */
617 int session_index;
618 /* Used for session reference counting */
619 int session_usage_count;
620 int session_waiting_on_uc;
621 u32 cmd_pdus;
622 u32 rsp_pdus;
623 u64 tx_data_octets;
624 u64 rx_data_octets;
625 u32 conn_digest_errors;
626 u32 conn_timeout_errors;
627 u64 creation_time;
628 spinlock_t session_stats_lock;
629 /* Number of active connections */
630 atomic_t nconn;
631 atomic_t session_continuation;
632 atomic_t session_fall_back_to_erl0;
633 atomic_t session_logout;
634 atomic_t session_reinstatement;
635 atomic_t session_stop_active;
636 atomic_t sleep_on_sess_wait_comp;
637 /* connection list */
638 struct list_head sess_conn_list;
639 struct list_head cr_active_list;
640 struct list_head cr_inactive_list;
641 spinlock_t conn_lock;
642 spinlock_t cr_a_lock;
643 spinlock_t cr_i_lock;
644 spinlock_t session_usage_lock;
645 spinlock_t ttt_lock;
646 struct completion async_msg_comp;
647 struct completion reinstatement_comp;
648 struct completion session_wait_comp;
649 struct completion session_waiting_on_uc_comp;
650 struct timer_list time2retain_timer;
651 struct iscsi_sess_ops *sess_ops;
652 struct se_session *se_sess;
653 struct iscsi_portal_group *tpg;
654} ____cacheline_aligned;
655
656struct iscsi_login {
657 u8 auth_complete;
658 u8 checked_for_existing;
659 u8 current_stage;
660 u8 leading_connection;
661 u8 first_request;
662 u8 version_min;
663 u8 version_max;
664 char isid[6];
665 u32 cmd_sn;
666 u32 init_task_tag;
667 u32 initial_exp_statsn;
668 u32 rsp_length;
669 u16 cid;
670 u16 tsih;
671 char *req;
672 char *rsp;
673 char *req_buf;
674 char *rsp_buf;
675} ____cacheline_aligned;
676
677struct iscsi_node_attrib {
678 u32 dataout_timeout;
679 u32 dataout_timeout_retries;
680 u32 default_erl;
681 u32 nopin_timeout;
682 u32 nopin_response_timeout;
683 u32 random_datain_pdu_offsets;
684 u32 random_datain_seq_offsets;
685 u32 random_r2t_offsets;
686 u32 tmr_cold_reset;
687 u32 tmr_warm_reset;
688 struct iscsi_node_acl *nacl;
689};
690
691struct se_dev_entry_s;
692
693struct iscsi_node_auth {
694 enum naf_flags_table naf_flags;
695 int authenticate_target;
696 /* Used for iscsit_global->discovery_auth,
697 * set to zero (auth disabled) by default */
698 int enforce_discovery_auth;
699#define MAX_USER_LEN 256
700#define MAX_PASS_LEN 256
701 char userid[MAX_USER_LEN];
702 char password[MAX_PASS_LEN];
703 char userid_mutual[MAX_USER_LEN];
704 char password_mutual[MAX_PASS_LEN];
705};
706
707#include "iscsi_target_stat.h"
708
709struct iscsi_node_stat_grps {
710 struct config_group iscsi_sess_stats_group;
711 struct config_group iscsi_conn_stats_group;
712};
713
714struct iscsi_node_acl {
715 struct iscsi_node_attrib node_attrib;
716 struct iscsi_node_auth node_auth;
717 struct iscsi_node_stat_grps node_stat_grps;
718 struct se_node_acl se_node_acl;
719};
720
721#define NODE_STAT_GRPS(nacl) (&(nacl)->node_stat_grps)
722
723#define ISCSI_NODE_ATTRIB(t) (&(t)->node_attrib)
724#define ISCSI_NODE_AUTH(t) (&(t)->node_auth)
725
726struct iscsi_tpg_attrib {
727 u32 authentication;
728 u32 login_timeout;
729 u32 netif_timeout;
730 u32 generate_node_acls;
731 u32 cache_dynamic_acls;
732 u32 default_cmdsn_depth;
733 u32 demo_mode_write_protect;
734 u32 prod_mode_write_protect;
735 struct iscsi_portal_group *tpg;
736};
737
738struct iscsi_np {
739 int np_network_transport;
740 int np_ip_proto;
741 int np_sock_type;
742 enum np_thread_state_table np_thread_state;
743 enum iscsi_timer_flags_table np_login_timer_flags;
744 u32 np_exports;
745 enum np_flags_table np_flags;
746 unsigned char np_ip[IPV6_ADDRESS_SPACE];
747 u16 np_port;
748 spinlock_t np_thread_lock;
749 struct completion np_restart_comp;
750 struct socket *np_socket;
751 struct __kernel_sockaddr_storage np_sockaddr;
752 struct task_struct *np_thread;
753 struct timer_list np_login_timer;
754 struct iscsi_portal_group *np_login_tpg;
755 struct list_head np_list;
756} ____cacheline_aligned;
757
758struct iscsi_tpg_np {
759 struct iscsi_np *tpg_np;
760 struct iscsi_portal_group *tpg;
761 struct iscsi_tpg_np *tpg_np_parent;
762 struct list_head tpg_np_list;
763 struct list_head tpg_np_child_list;
764 struct list_head tpg_np_parent_list;
765 struct se_tpg_np se_tpg_np;
766 spinlock_t tpg_np_parent_lock;
767};
768
769struct iscsi_portal_group {
770 unsigned char tpg_chap_id;
771 /* TPG State */
772 enum tpg_state_table tpg_state;
773 /* Target Portal Group Tag */
774 u16 tpgt;
775 /* Id assigned to target sessions */
776 u16 ntsih;
777 /* Number of active sessions */
778 u32 nsessions;
779 /* Number of Network Portals available for this TPG */
780 u32 num_tpg_nps;
781 /* Per TPG LIO specific session ID. */
782 u32 sid;
783 /* Spinlock for adding/removing Network Portals */
784 spinlock_t tpg_np_lock;
785 spinlock_t tpg_state_lock;
786 struct se_portal_group tpg_se_tpg;
787 struct mutex tpg_access_lock;
788 struct mutex np_login_lock;
789 struct iscsi_tpg_attrib tpg_attrib;
790 /* Pointer to default list of iSCSI parameters for TPG */
791 struct iscsi_param_list *param_list;
792 struct iscsi_tiqn *tpg_tiqn;
793 struct list_head tpg_gnp_list;
794 struct list_head tpg_list;
795} ____cacheline_aligned;
796
797#define ISCSI_TPG_C(c) ((struct iscsi_portal_group *)(c)->tpg)
798#define ISCSI_TPG_LUN(c, l) ((iscsi_tpg_list_t *)(c)->tpg->tpg_lun_list_t[l])
799#define ISCSI_TPG_S(s) ((struct iscsi_portal_group *)(s)->tpg)
800#define ISCSI_TPG_ATTRIB(t) (&(t)->tpg_attrib)
801#define SE_TPG(tpg) (&(tpg)->tpg_se_tpg)
802
803struct iscsi_wwn_stat_grps {
804 struct config_group iscsi_stat_group;
805 struct config_group iscsi_instance_group;
806 struct config_group iscsi_sess_err_group;
807 struct config_group iscsi_tgt_attr_group;
808 struct config_group iscsi_login_stats_group;
809 struct config_group iscsi_logout_stats_group;
810};
811
812struct iscsi_tiqn {
813#define ISCSI_IQN_LEN 224
814 unsigned char tiqn[ISCSI_IQN_LEN];
815 enum tiqn_state_table tiqn_state;
816 int tiqn_access_count;
817 u32 tiqn_active_tpgs;
818 u32 tiqn_ntpgs;
819 u32 tiqn_num_tpg_nps;
820 u32 tiqn_nsessions;
821 struct list_head tiqn_list;
822 struct list_head tiqn_tpg_list;
823 spinlock_t tiqn_state_lock;
824 spinlock_t tiqn_tpg_lock;
825 struct se_wwn tiqn_wwn;
826 struct iscsi_wwn_stat_grps tiqn_stat_grps;
827 int tiqn_index;
828 struct iscsi_sess_err_stats sess_err_stats;
829 struct iscsi_login_stats login_stats;
830 struct iscsi_logout_stats logout_stats;
831} ____cacheline_aligned;
832
833#define WWN_STAT_GRPS(tiqn) (&(tiqn)->tiqn_stat_grps)
834
835struct iscsit_global {
836 /* In core shutdown */
837 u32 in_shutdown;
838 u32 active_ts;
839 /* Unique identifier used for the authentication daemon */
840 u32 auth_id;
841 u32 inactive_ts;
842 /* Thread Set bitmap count */
843 int ts_bitmap_count;
844 /* Thread Set bitmap pointer */
845 unsigned long *ts_bitmap;
846 /* Used for iSCSI discovery session authentication */
847 struct iscsi_node_acl discovery_acl;
848 struct iscsi_portal_group *discovery_tpg;
849};
850
851#endif /* ISCSI_TARGET_CORE_H */