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[mirror_ubuntu-hirsute-kernel.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 iscsit_transport_type {
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 IFC_SENDTARGETS_ALL = 0x00000200,
137 IFC_SENDTARGETS_SINGLE = 0x00000400,
138 };
139
140 /* struct iscsi_cmd->i_state */
141 enum cmd_i_state_table {
142 ISTATE_NO_STATE = 0,
143 ISTATE_NEW_CMD = 1,
144 ISTATE_DEFERRED_CMD = 2,
145 ISTATE_UNSOLICITED_DATA = 3,
146 ISTATE_RECEIVE_DATAOUT = 4,
147 ISTATE_RECEIVE_DATAOUT_RECOVERY = 5,
148 ISTATE_RECEIVED_LAST_DATAOUT = 6,
149 ISTATE_WITHIN_DATAOUT_RECOVERY = 7,
150 ISTATE_IN_CONNECTION_RECOVERY = 8,
151 ISTATE_RECEIVED_TASKMGT = 9,
152 ISTATE_SEND_ASYNCMSG = 10,
153 ISTATE_SENT_ASYNCMSG = 11,
154 ISTATE_SEND_DATAIN = 12,
155 ISTATE_SEND_LAST_DATAIN = 13,
156 ISTATE_SENT_LAST_DATAIN = 14,
157 ISTATE_SEND_LOGOUTRSP = 15,
158 ISTATE_SENT_LOGOUTRSP = 16,
159 ISTATE_SEND_NOPIN = 17,
160 ISTATE_SENT_NOPIN = 18,
161 ISTATE_SEND_REJECT = 19,
162 ISTATE_SENT_REJECT = 20,
163 ISTATE_SEND_R2T = 21,
164 ISTATE_SENT_R2T = 22,
165 ISTATE_SEND_R2T_RECOVERY = 23,
166 ISTATE_SENT_R2T_RECOVERY = 24,
167 ISTATE_SEND_LAST_R2T = 25,
168 ISTATE_SENT_LAST_R2T = 26,
169 ISTATE_SEND_LAST_R2T_RECOVERY = 27,
170 ISTATE_SENT_LAST_R2T_RECOVERY = 28,
171 ISTATE_SEND_STATUS = 29,
172 ISTATE_SEND_STATUS_BROKEN_PC = 30,
173 ISTATE_SENT_STATUS = 31,
174 ISTATE_SEND_STATUS_RECOVERY = 32,
175 ISTATE_SENT_STATUS_RECOVERY = 33,
176 ISTATE_SEND_TASKMGTRSP = 34,
177 ISTATE_SENT_TASKMGTRSP = 35,
178 ISTATE_SEND_TEXTRSP = 36,
179 ISTATE_SENT_TEXTRSP = 37,
180 ISTATE_SEND_NOPIN_WANT_RESPONSE = 38,
181 ISTATE_SENT_NOPIN_WANT_RESPONSE = 39,
182 ISTATE_SEND_NOPIN_NO_RESPONSE = 40,
183 ISTATE_REMOVE = 41,
184 ISTATE_FREE = 42,
185 };
186
187 /* Used for iscsi_recover_cmdsn() return values */
188 enum recover_cmdsn_ret_table {
189 CMDSN_ERROR_CANNOT_RECOVER = -1,
190 CMDSN_NORMAL_OPERATION = 0,
191 CMDSN_LOWER_THAN_EXP = 1,
192 CMDSN_HIGHER_THAN_EXP = 2,
193 };
194
195 /* Used for iscsi_handle_immediate_data() return values */
196 enum immedate_data_ret_table {
197 IMMEDIATE_DATA_CANNOT_RECOVER = -1,
198 IMMEDIATE_DATA_NORMAL_OPERATION = 0,
199 IMMEDIATE_DATA_ERL1_CRC_FAILURE = 1,
200 };
201
202 /* Used for iscsi_decide_dataout_action() return values */
203 enum dataout_action_ret_table {
204 DATAOUT_CANNOT_RECOVER = -1,
205 DATAOUT_NORMAL = 0,
206 DATAOUT_SEND_R2T = 1,
207 DATAOUT_SEND_TO_TRANSPORT = 2,
208 DATAOUT_WITHIN_COMMAND_RECOVERY = 3,
209 };
210
211 /* Used for struct iscsi_node_auth->naf_flags */
212 enum naf_flags_table {
213 NAF_USERID_SET = 0x01,
214 NAF_PASSWORD_SET = 0x02,
215 NAF_USERID_IN_SET = 0x04,
216 NAF_PASSWORD_IN_SET = 0x08,
217 };
218
219 /* Used by various struct timer_list to manage iSCSI specific state */
220 enum iscsi_timer_flags_table {
221 ISCSI_TF_RUNNING = 0x01,
222 ISCSI_TF_STOP = 0x02,
223 ISCSI_TF_EXPIRED = 0x04,
224 };
225
226 /* Used for struct iscsi_np->np_flags */
227 enum np_flags_table {
228 NPF_IP_NETWORK = 0x00,
229 };
230
231 /* Used for struct iscsi_np->np_thread_state */
232 enum np_thread_state_table {
233 ISCSI_NP_THREAD_ACTIVE = 1,
234 ISCSI_NP_THREAD_INACTIVE = 2,
235 ISCSI_NP_THREAD_RESET = 3,
236 ISCSI_NP_THREAD_SHUTDOWN = 4,
237 ISCSI_NP_THREAD_EXIT = 5,
238 };
239
240 struct iscsi_conn_ops {
241 u8 HeaderDigest; /* [0,1] == [None,CRC32C] */
242 u8 DataDigest; /* [0,1] == [None,CRC32C] */
243 u32 MaxRecvDataSegmentLength; /* [512..2**24-1] */
244 u32 MaxXmitDataSegmentLength; /* [512..2**24-1] */
245 u8 OFMarker; /* [0,1] == [No,Yes] */
246 u8 IFMarker; /* [0,1] == [No,Yes] */
247 u32 OFMarkInt; /* [1..65535] */
248 u32 IFMarkInt; /* [1..65535] */
249 /*
250 * iSER specific connection parameters
251 */
252 u32 InitiatorRecvDataSegmentLength; /* [512..2**24-1] */
253 u32 TargetRecvDataSegmentLength; /* [512..2**24-1] */
254 };
255
256 struct iscsi_sess_ops {
257 char InitiatorName[224];
258 char InitiatorAlias[256];
259 char TargetName[224];
260 char TargetAlias[256];
261 char TargetAddress[256];
262 u16 TargetPortalGroupTag; /* [0..65535] */
263 u16 MaxConnections; /* [1..65535] */
264 u8 InitialR2T; /* [0,1] == [No,Yes] */
265 u8 ImmediateData; /* [0,1] == [No,Yes] */
266 u32 MaxBurstLength; /* [512..2**24-1] */
267 u32 FirstBurstLength; /* [512..2**24-1] */
268 u16 DefaultTime2Wait; /* [0..3600] */
269 u16 DefaultTime2Retain; /* [0..3600] */
270 u16 MaxOutstandingR2T; /* [1..65535] */
271 u8 DataPDUInOrder; /* [0,1] == [No,Yes] */
272 u8 DataSequenceInOrder; /* [0,1] == [No,Yes] */
273 u8 ErrorRecoveryLevel; /* [0..2] */
274 u8 SessionType; /* [0,1] == [Normal,Discovery]*/
275 /*
276 * iSER specific session parameters
277 */
278 u8 RDMAExtensions; /* [0,1] == [No,Yes] */
279 };
280
281 struct iscsi_queue_req {
282 int state;
283 struct iscsi_cmd *cmd;
284 struct list_head qr_list;
285 };
286
287 struct iscsi_data_count {
288 int data_length;
289 int sync_and_steering;
290 enum data_count_type type;
291 u32 iov_count;
292 u32 ss_iov_count;
293 u32 ss_marker_count;
294 struct kvec *iov;
295 };
296
297 struct iscsi_param_list {
298 bool iser;
299 struct list_head param_list;
300 struct list_head extra_response_list;
301 };
302
303 struct iscsi_datain_req {
304 enum datain_req_comp_table dr_complete;
305 int generate_recovery_values;
306 enum datain_req_rec_table recovery;
307 u32 begrun;
308 u32 runlength;
309 u32 data_length;
310 u32 data_offset;
311 u32 data_sn;
312 u32 next_burst_len;
313 u32 read_data_done;
314 u32 seq_send_order;
315 struct list_head cmd_datain_node;
316 } ____cacheline_aligned;
317
318 struct iscsi_ooo_cmdsn {
319 u16 cid;
320 u32 batch_count;
321 u32 cmdsn;
322 u32 exp_cmdsn;
323 struct iscsi_cmd *cmd;
324 struct list_head ooo_list;
325 } ____cacheline_aligned;
326
327 struct iscsi_datain {
328 u8 flags;
329 u32 data_sn;
330 u32 length;
331 u32 offset;
332 } ____cacheline_aligned;
333
334 struct iscsi_r2t {
335 int seq_complete;
336 int recovery_r2t;
337 int sent_r2t;
338 u32 r2t_sn;
339 u32 offset;
340 u32 targ_xfer_tag;
341 u32 xfer_len;
342 struct list_head r2t_list;
343 } ____cacheline_aligned;
344
345 struct iscsi_cmd {
346 enum iscsi_timer_flags_table dataout_timer_flags;
347 /* DataOUT timeout retries */
348 u8 dataout_timeout_retries;
349 /* Within command recovery count */
350 u8 error_recovery_count;
351 /* iSCSI dependent state for out or order CmdSNs */
352 enum cmd_i_state_table deferred_i_state;
353 /* iSCSI dependent state */
354 enum cmd_i_state_table i_state;
355 /* Command is an immediate command (ISCSI_OP_IMMEDIATE set) */
356 u8 immediate_cmd;
357 /* Immediate data present */
358 u8 immediate_data;
359 /* iSCSI Opcode */
360 u8 iscsi_opcode;
361 /* iSCSI Response Code */
362 u8 iscsi_response;
363 /* Logout reason when iscsi_opcode == ISCSI_INIT_LOGOUT_CMND */
364 u8 logout_reason;
365 /* Logout response code when iscsi_opcode == ISCSI_INIT_LOGOUT_CMND */
366 u8 logout_response;
367 /* MaxCmdSN has been incremented */
368 u8 maxcmdsn_inc;
369 /* Immediate Unsolicited Dataout */
370 u8 unsolicited_data;
371 /* CID contained in logout PDU when opcode == ISCSI_INIT_LOGOUT_CMND */
372 u16 logout_cid;
373 /* Command flags */
374 enum cmd_flags_table cmd_flags;
375 /* Initiator Task Tag assigned from Initiator */
376 itt_t init_task_tag;
377 /* Target Transfer Tag assigned from Target */
378 u32 targ_xfer_tag;
379 /* CmdSN assigned from Initiator */
380 u32 cmd_sn;
381 /* ExpStatSN assigned from Initiator */
382 u32 exp_stat_sn;
383 /* StatSN assigned to this ITT */
384 u32 stat_sn;
385 /* DataSN Counter */
386 u32 data_sn;
387 /* R2TSN Counter */
388 u32 r2t_sn;
389 /* Last DataSN acknowledged via DataAck SNACK */
390 u32 acked_data_sn;
391 /* Used for echoing NOPOUT ping data */
392 u32 buf_ptr_size;
393 /* Used to store DataDigest */
394 u32 data_crc;
395 /* Counter for MaxOutstandingR2T */
396 u32 outstanding_r2ts;
397 /* Next R2T Offset when DataSequenceInOrder=Yes */
398 u32 r2t_offset;
399 /* Iovec current and orig count for iscsi_cmd->iov_data */
400 u32 iov_data_count;
401 u32 orig_iov_data_count;
402 /* Number of miscellaneous iovecs used for IP stack calls */
403 u32 iov_misc_count;
404 /* Number of struct iscsi_pdu in struct iscsi_cmd->pdu_list */
405 u32 pdu_count;
406 /* Next struct iscsi_pdu to send in struct iscsi_cmd->pdu_list */
407 u32 pdu_send_order;
408 /* Current struct iscsi_pdu in struct iscsi_cmd->pdu_list */
409 u32 pdu_start;
410 /* Next struct iscsi_seq to send in struct iscsi_cmd->seq_list */
411 u32 seq_send_order;
412 /* Number of struct iscsi_seq in struct iscsi_cmd->seq_list */
413 u32 seq_count;
414 /* Current struct iscsi_seq in struct iscsi_cmd->seq_list */
415 u32 seq_no;
416 /* Lowest offset in current DataOUT sequence */
417 u32 seq_start_offset;
418 /* Highest offset in current DataOUT sequence */
419 u32 seq_end_offset;
420 /* Total size in bytes received so far of READ data */
421 u32 read_data_done;
422 /* Total size in bytes received so far of WRITE data */
423 u32 write_data_done;
424 /* Counter for FirstBurstLength key */
425 u32 first_burst_len;
426 /* Counter for MaxBurstLength key */
427 u32 next_burst_len;
428 /* Transfer size used for IP stack calls */
429 u32 tx_size;
430 /* Buffer used for various purposes */
431 void *buf_ptr;
432 /* Used by SendTargets=[iqn.,eui.] discovery */
433 void *text_in_ptr;
434 /* See include/linux/dma-mapping.h */
435 enum dma_data_direction data_direction;
436 /* iSCSI PDU Header + CRC */
437 unsigned char pdu[ISCSI_HDR_LEN + ISCSI_CRC_LEN];
438 /* Number of times struct iscsi_cmd is present in immediate queue */
439 atomic_t immed_queue_count;
440 atomic_t response_queue_count;
441 spinlock_t datain_lock;
442 spinlock_t dataout_timeout_lock;
443 /* spinlock for protecting struct iscsi_cmd->i_state */
444 spinlock_t istate_lock;
445 /* spinlock for adding within command recovery entries */
446 spinlock_t error_lock;
447 /* spinlock for adding R2Ts */
448 spinlock_t r2t_lock;
449 /* DataIN List */
450 struct list_head datain_list;
451 /* R2T List */
452 struct list_head cmd_r2t_list;
453 struct completion reject_comp;
454 /* Timer for DataOUT */
455 struct timer_list dataout_timer;
456 /* Iovecs for SCSI data payload RX/TX w/ kernel level sockets */
457 struct kvec *iov_data;
458 /* Iovecs for miscellaneous purposes */
459 #define ISCSI_MISC_IOVECS 5
460 struct kvec iov_misc[ISCSI_MISC_IOVECS];
461 /* Array of struct iscsi_pdu used for DataPDUInOrder=No */
462 struct iscsi_pdu *pdu_list;
463 /* Current struct iscsi_pdu used for DataPDUInOrder=No */
464 struct iscsi_pdu *pdu_ptr;
465 /* Array of struct iscsi_seq used for DataSequenceInOrder=No */
466 struct iscsi_seq *seq_list;
467 /* Current struct iscsi_seq used for DataSequenceInOrder=No */
468 struct iscsi_seq *seq_ptr;
469 /* TMR Request when iscsi_opcode == ISCSI_OP_SCSI_TMFUNC */
470 struct iscsi_tmr_req *tmr_req;
471 /* Connection this command is alligient to */
472 struct iscsi_conn *conn;
473 /* Pointer to connection recovery entry */
474 struct iscsi_conn_recovery *cr;
475 /* Session the command is part of, used for connection recovery */
476 struct iscsi_session *sess;
477 /* list_head for connection list */
478 struct list_head i_conn_node;
479 /* The TCM I/O descriptor that is accessed via container_of() */
480 struct se_cmd se_cmd;
481 /* Sense buffer that will be mapped into outgoing status */
482 #define ISCSI_SENSE_BUFFER_LEN (TRANSPORT_SENSE_BUFFER + 2)
483 unsigned char sense_buffer[ISCSI_SENSE_BUFFER_LEN];
484
485 u32 padding;
486 u8 pad_bytes[4];
487
488 struct scatterlist *first_data_sg;
489 u32 first_data_sg_off;
490 u32 kmapped_nents;
491 sense_reason_t sense_reason;
492 void (*release_cmd)(struct iscsi_cmd *);
493 } ____cacheline_aligned;
494
495 struct iscsi_tmr_req {
496 bool task_reassign:1;
497 u32 exp_data_sn;
498 struct iscsi_cmd *ref_cmd;
499 struct iscsi_conn_recovery *conn_recovery;
500 struct se_tmr_req *se_tmr_req;
501 };
502
503 struct iscsi_conn {
504 wait_queue_head_t queues_wq;
505 /* Authentication Successful for this connection */
506 u8 auth_complete;
507 /* State connection is currently in */
508 u8 conn_state;
509 u8 conn_logout_reason;
510 u8 network_transport;
511 enum iscsi_timer_flags_table nopin_timer_flags;
512 enum iscsi_timer_flags_table nopin_response_timer_flags;
513 /* Used to know what thread encountered a transport failure */
514 u8 which_thread;
515 /* connection id assigned by the Initiator */
516 u16 cid;
517 /* Remote TCP Port */
518 u16 login_port;
519 u16 local_port;
520 int net_size;
521 int login_family;
522 u32 auth_id;
523 u32 conn_flags;
524 /* Used for iscsi_tx_login_rsp() */
525 itt_t login_itt;
526 u32 exp_statsn;
527 /* Per connection status sequence number */
528 u32 stat_sn;
529 /* IFMarkInt's Current Value */
530 u32 if_marker;
531 /* OFMarkInt's Current Value */
532 u32 of_marker;
533 /* Used for calculating OFMarker offset to next PDU */
534 u32 of_marker_offset;
535 /* Complete Bad PDU for sending reject */
536 unsigned char bad_hdr[ISCSI_HDR_LEN];
537 #define IPV6_ADDRESS_SPACE 48
538 unsigned char login_ip[IPV6_ADDRESS_SPACE];
539 unsigned char local_ip[IPV6_ADDRESS_SPACE];
540 int conn_usage_count;
541 int conn_waiting_on_uc;
542 atomic_t check_immediate_queue;
543 atomic_t conn_logout_remove;
544 atomic_t connection_exit;
545 atomic_t connection_recovery;
546 atomic_t connection_reinstatement;
547 atomic_t connection_wait_rcfr;
548 atomic_t sleep_on_conn_wait_comp;
549 atomic_t transport_failed;
550 struct completion conn_post_wait_comp;
551 struct completion conn_wait_comp;
552 struct completion conn_wait_rcfr_comp;
553 struct completion conn_waiting_on_uc_comp;
554 struct completion conn_logout_comp;
555 struct completion tx_half_close_comp;
556 struct completion rx_half_close_comp;
557 /* socket used by this connection */
558 struct socket *sock;
559 struct timer_list nopin_timer;
560 struct timer_list nopin_response_timer;
561 struct timer_list transport_timer;
562 /* Spinlock used for add/deleting cmd's from conn_cmd_list */
563 spinlock_t cmd_lock;
564 spinlock_t conn_usage_lock;
565 spinlock_t immed_queue_lock;
566 spinlock_t nopin_timer_lock;
567 spinlock_t response_queue_lock;
568 spinlock_t state_lock;
569 /* libcrypto RX and TX contexts for crc32c */
570 struct hash_desc conn_rx_hash;
571 struct hash_desc conn_tx_hash;
572 /* Used for scheduling TX and RX connection kthreads */
573 cpumask_var_t conn_cpumask;
574 unsigned int conn_rx_reset_cpumask:1;
575 unsigned int conn_tx_reset_cpumask:1;
576 /* list_head of struct iscsi_cmd for this connection */
577 struct list_head conn_cmd_list;
578 struct list_head immed_queue_list;
579 struct list_head response_queue_list;
580 struct iscsi_conn_ops *conn_ops;
581 struct iscsi_login *conn_login;
582 struct iscsit_transport *conn_transport;
583 struct iscsi_param_list *param_list;
584 /* Used for per connection auth state machine */
585 void *auth_protocol;
586 void *context;
587 struct iscsi_login_thread_s *login_thread;
588 struct iscsi_portal_group *tpg;
589 /* Pointer to parent session */
590 struct iscsi_session *sess;
591 /* Pointer to thread_set in use for this conn's threads */
592 struct iscsi_thread_set *thread_set;
593 /* list_head for session connection list */
594 struct list_head conn_list;
595 } ____cacheline_aligned;
596
597 struct iscsi_conn_recovery {
598 u16 cid;
599 u32 cmd_count;
600 u32 maxrecvdatasegmentlength;
601 u32 maxxmitdatasegmentlength;
602 int ready_for_reallegiance;
603 struct list_head conn_recovery_cmd_list;
604 spinlock_t conn_recovery_cmd_lock;
605 struct timer_list time2retain_timer;
606 struct iscsi_session *sess;
607 struct list_head cr_list;
608 } ____cacheline_aligned;
609
610 struct iscsi_session {
611 u8 initiator_vendor;
612 u8 isid[6];
613 enum iscsi_timer_flags_table time2retain_timer_flags;
614 u8 version_active;
615 u16 cid_called;
616 u16 conn_recovery_count;
617 u16 tsih;
618 /* state session is currently in */
619 u32 session_state;
620 /* session wide counter: initiator assigned task tag */
621 itt_t init_task_tag;
622 /* session wide counter: target assigned task tag */
623 u32 targ_xfer_tag;
624 u32 cmdsn_window;
625
626 /* protects cmdsn values */
627 struct mutex cmdsn_mutex;
628 /* session wide counter: expected command sequence number */
629 u32 exp_cmd_sn;
630 /* session wide counter: maximum allowed command sequence number */
631 u32 max_cmd_sn;
632 struct list_head sess_ooo_cmdsn_list;
633
634 /* LIO specific session ID */
635 u32 sid;
636 char auth_type[8];
637 /* unique within the target */
638 int session_index;
639 /* Used for session reference counting */
640 int session_usage_count;
641 int session_waiting_on_uc;
642 u32 cmd_pdus;
643 u32 rsp_pdus;
644 u64 tx_data_octets;
645 u64 rx_data_octets;
646 u32 conn_digest_errors;
647 u32 conn_timeout_errors;
648 u64 creation_time;
649 spinlock_t session_stats_lock;
650 /* Number of active connections */
651 atomic_t nconn;
652 atomic_t session_continuation;
653 atomic_t session_fall_back_to_erl0;
654 atomic_t session_logout;
655 atomic_t session_reinstatement;
656 atomic_t session_stop_active;
657 atomic_t sleep_on_sess_wait_comp;
658 /* connection list */
659 struct list_head sess_conn_list;
660 struct list_head cr_active_list;
661 struct list_head cr_inactive_list;
662 spinlock_t conn_lock;
663 spinlock_t cr_a_lock;
664 spinlock_t cr_i_lock;
665 spinlock_t session_usage_lock;
666 spinlock_t ttt_lock;
667 struct completion async_msg_comp;
668 struct completion reinstatement_comp;
669 struct completion session_wait_comp;
670 struct completion session_waiting_on_uc_comp;
671 struct timer_list time2retain_timer;
672 struct iscsi_sess_ops *sess_ops;
673 struct se_session *se_sess;
674 struct iscsi_portal_group *tpg;
675 } ____cacheline_aligned;
676
677 struct iscsi_login {
678 u8 auth_complete;
679 u8 checked_for_existing;
680 u8 current_stage;
681 u8 leading_connection;
682 u8 first_request;
683 u8 version_min;
684 u8 version_max;
685 u8 login_complete;
686 u8 login_failed;
687 char isid[6];
688 u32 cmd_sn;
689 itt_t init_task_tag;
690 u32 initial_exp_statsn;
691 u32 rsp_length;
692 u16 cid;
693 u16 tsih;
694 char req[ISCSI_HDR_LEN];
695 char rsp[ISCSI_HDR_LEN];
696 char *req_buf;
697 char *rsp_buf;
698 struct iscsi_conn *conn;
699 } ____cacheline_aligned;
700
701 struct iscsi_node_attrib {
702 u32 dataout_timeout;
703 u32 dataout_timeout_retries;
704 u32 default_erl;
705 u32 nopin_timeout;
706 u32 nopin_response_timeout;
707 u32 random_datain_pdu_offsets;
708 u32 random_datain_seq_offsets;
709 u32 random_r2t_offsets;
710 u32 tmr_cold_reset;
711 u32 tmr_warm_reset;
712 struct iscsi_node_acl *nacl;
713 };
714
715 struct se_dev_entry_s;
716
717 struct iscsi_node_auth {
718 enum naf_flags_table naf_flags;
719 int authenticate_target;
720 /* Used for iscsit_global->discovery_auth,
721 * set to zero (auth disabled) by default */
722 int enforce_discovery_auth;
723 #define MAX_USER_LEN 256
724 #define MAX_PASS_LEN 256
725 char userid[MAX_USER_LEN];
726 char password[MAX_PASS_LEN];
727 char userid_mutual[MAX_USER_LEN];
728 char password_mutual[MAX_PASS_LEN];
729 };
730
731 #include "iscsi_target_stat.h"
732
733 struct iscsi_node_stat_grps {
734 struct config_group iscsi_sess_stats_group;
735 struct config_group iscsi_conn_stats_group;
736 };
737
738 struct iscsi_node_acl {
739 struct iscsi_node_attrib node_attrib;
740 struct iscsi_node_auth node_auth;
741 struct iscsi_node_stat_grps node_stat_grps;
742 struct se_node_acl se_node_acl;
743 };
744
745 #define NODE_STAT_GRPS(nacl) (&(nacl)->node_stat_grps)
746
747 #define ISCSI_NODE_ATTRIB(t) (&(t)->node_attrib)
748 #define ISCSI_NODE_AUTH(t) (&(t)->node_auth)
749
750 struct iscsi_tpg_attrib {
751 u32 authentication;
752 u32 login_timeout;
753 u32 netif_timeout;
754 u32 generate_node_acls;
755 u32 cache_dynamic_acls;
756 u32 default_cmdsn_depth;
757 u32 demo_mode_write_protect;
758 u32 prod_mode_write_protect;
759 struct iscsi_portal_group *tpg;
760 };
761
762 struct iscsi_np {
763 int np_network_transport;
764 int np_ip_proto;
765 int np_sock_type;
766 enum np_thread_state_table np_thread_state;
767 enum iscsi_timer_flags_table np_login_timer_flags;
768 u32 np_exports;
769 enum np_flags_table np_flags;
770 unsigned char np_ip[IPV6_ADDRESS_SPACE];
771 u16 np_port;
772 spinlock_t np_thread_lock;
773 struct completion np_restart_comp;
774 struct socket *np_socket;
775 struct __kernel_sockaddr_storage np_sockaddr;
776 struct task_struct *np_thread;
777 struct timer_list np_login_timer;
778 struct iscsi_portal_group *np_login_tpg;
779 void *np_context;
780 struct iscsit_transport *np_transport;
781 struct list_head np_list;
782 } ____cacheline_aligned;
783
784 struct iscsi_tpg_np {
785 struct iscsi_np *tpg_np;
786 struct iscsi_portal_group *tpg;
787 struct iscsi_tpg_np *tpg_np_parent;
788 struct list_head tpg_np_list;
789 struct list_head tpg_np_child_list;
790 struct list_head tpg_np_parent_list;
791 struct se_tpg_np se_tpg_np;
792 spinlock_t tpg_np_parent_lock;
793 };
794
795 struct iscsi_portal_group {
796 unsigned char tpg_chap_id;
797 /* TPG State */
798 enum tpg_state_table tpg_state;
799 /* Target Portal Group Tag */
800 u16 tpgt;
801 /* Id assigned to target sessions */
802 u16 ntsih;
803 /* Number of active sessions */
804 u32 nsessions;
805 /* Number of Network Portals available for this TPG */
806 u32 num_tpg_nps;
807 /* Per TPG LIO specific session ID. */
808 u32 sid;
809 /* Spinlock for adding/removing Network Portals */
810 spinlock_t tpg_np_lock;
811 spinlock_t tpg_state_lock;
812 struct se_portal_group tpg_se_tpg;
813 struct mutex tpg_access_lock;
814 struct mutex np_login_lock;
815 struct iscsi_tpg_attrib tpg_attrib;
816 struct iscsi_node_auth tpg_demo_auth;
817 /* Pointer to default list of iSCSI parameters for TPG */
818 struct iscsi_param_list *param_list;
819 struct iscsi_tiqn *tpg_tiqn;
820 struct list_head tpg_gnp_list;
821 struct list_head tpg_list;
822 } ____cacheline_aligned;
823
824 #define ISCSI_TPG_C(c) ((struct iscsi_portal_group *)(c)->tpg)
825 #define ISCSI_TPG_LUN(c, l) ((iscsi_tpg_list_t *)(c)->tpg->tpg_lun_list_t[l])
826 #define ISCSI_TPG_S(s) ((struct iscsi_portal_group *)(s)->tpg)
827 #define ISCSI_TPG_ATTRIB(t) (&(t)->tpg_attrib)
828 #define SE_TPG(tpg) (&(tpg)->tpg_se_tpg)
829
830 struct iscsi_wwn_stat_grps {
831 struct config_group iscsi_stat_group;
832 struct config_group iscsi_instance_group;
833 struct config_group iscsi_sess_err_group;
834 struct config_group iscsi_tgt_attr_group;
835 struct config_group iscsi_login_stats_group;
836 struct config_group iscsi_logout_stats_group;
837 };
838
839 struct iscsi_tiqn {
840 #define ISCSI_IQN_LEN 224
841 unsigned char tiqn[ISCSI_IQN_LEN];
842 enum tiqn_state_table tiqn_state;
843 int tiqn_access_count;
844 u32 tiqn_active_tpgs;
845 u32 tiqn_ntpgs;
846 u32 tiqn_num_tpg_nps;
847 u32 tiqn_nsessions;
848 struct list_head tiqn_list;
849 struct list_head tiqn_tpg_list;
850 spinlock_t tiqn_state_lock;
851 spinlock_t tiqn_tpg_lock;
852 struct se_wwn tiqn_wwn;
853 struct iscsi_wwn_stat_grps tiqn_stat_grps;
854 int tiqn_index;
855 struct iscsi_sess_err_stats sess_err_stats;
856 struct iscsi_login_stats login_stats;
857 struct iscsi_logout_stats logout_stats;
858 } ____cacheline_aligned;
859
860 #define WWN_STAT_GRPS(tiqn) (&(tiqn)->tiqn_stat_grps)
861
862 struct iscsit_global {
863 /* In core shutdown */
864 u32 in_shutdown;
865 u32 active_ts;
866 /* Unique identifier used for the authentication daemon */
867 u32 auth_id;
868 u32 inactive_ts;
869 /* Thread Set bitmap count */
870 int ts_bitmap_count;
871 /* Thread Set bitmap pointer */
872 unsigned long *ts_bitmap;
873 /* Used for iSCSI discovery session authentication */
874 struct iscsi_node_acl discovery_acl;
875 struct iscsi_portal_group *discovery_tpg;
876 };
877
878 #endif /* ISCSI_TARGET_CORE_H */
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