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target: Minimize SCSI header #include directives
[deliverable/linux.git] / include / 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/iscsi_proto.h>
9 #include <target/target_core_base.h>
10
11 #define ISCSIT_VERSION "v4.1.0"
12 #define ISCSI_MAX_DATASN_MISSING_COUNT 16
13 #define ISCSI_TX_THREAD_TCP_TIMEOUT 2
14 #define ISCSI_RX_THREAD_TCP_TIMEOUT 2
15 #define SECONDS_FOR_ASYNC_LOGOUT 10
16 #define SECONDS_FOR_ASYNC_TEXT 10
17 #define SECONDS_FOR_LOGOUT_COMP 15
18 #define WHITE_SPACE " \t\v\f\n\r"
19 #define ISCSIT_MIN_TAGS 16
20 #define ISCSIT_EXTRA_TAGS 8
21 #define ISCSIT_TCP_BACKLOG 256
22 #define ISCSI_RX_THREAD_NAME "iscsi_trx"
23 #define ISCSI_TX_THREAD_NAME "iscsi_ttx"
24
25 /* struct iscsi_node_attrib sanity values */
26 #define NA_DATAOUT_TIMEOUT 3
27 #define NA_DATAOUT_TIMEOUT_MAX 60
28 #define NA_DATAOUT_TIMEOUT_MIX 2
29 #define NA_DATAOUT_TIMEOUT_RETRIES 5
30 #define NA_DATAOUT_TIMEOUT_RETRIES_MAX 15
31 #define NA_DATAOUT_TIMEOUT_RETRIES_MIN 1
32 #define NA_NOPIN_TIMEOUT 15
33 #define NA_NOPIN_TIMEOUT_MAX 60
34 #define NA_NOPIN_TIMEOUT_MIN 3
35 #define NA_NOPIN_RESPONSE_TIMEOUT 30
36 #define NA_NOPIN_RESPONSE_TIMEOUT_MAX 60
37 #define NA_NOPIN_RESPONSE_TIMEOUT_MIN 3
38 #define NA_RANDOM_DATAIN_PDU_OFFSETS 0
39 #define NA_RANDOM_DATAIN_SEQ_OFFSETS 0
40 #define NA_RANDOM_R2T_OFFSETS 0
41
42 /* struct iscsi_tpg_attrib sanity values */
43 #define TA_AUTHENTICATION 1
44 #define TA_LOGIN_TIMEOUT 15
45 #define TA_LOGIN_TIMEOUT_MAX 30
46 #define TA_LOGIN_TIMEOUT_MIN 5
47 #define TA_NETIF_TIMEOUT 2
48 #define TA_NETIF_TIMEOUT_MAX 15
49 #define TA_NETIF_TIMEOUT_MIN 2
50 #define TA_GENERATE_NODE_ACLS 0
51 #define TA_DEFAULT_CMDSN_DEPTH 64
52 #define TA_DEFAULT_CMDSN_DEPTH_MAX 512
53 #define TA_DEFAULT_CMDSN_DEPTH_MIN 1
54 #define TA_CACHE_DYNAMIC_ACLS 0
55 /* Enabled by default in demo mode (generic_node_acls=1) */
56 #define TA_DEMO_MODE_WRITE_PROTECT 1
57 /* Disabled by default in production mode w/ explict ACLs */
58 #define TA_PROD_MODE_WRITE_PROTECT 0
59 #define TA_DEMO_MODE_DISCOVERY 1
60 #define TA_DEFAULT_ERL 0
61 #define TA_CACHE_CORE_NPS 0
62 /* T10 protection information disabled by default */
63 #define TA_DEFAULT_T10_PI 0
64 #define TA_DEFAULT_FABRIC_PROT_TYPE 0
65
66 #define ISCSI_IOV_DATA_BUFFER 5
67
68 enum iscsit_transport_type {
69 ISCSI_TCP = 0,
70 ISCSI_SCTP_TCP = 1,
71 ISCSI_SCTP_UDP = 2,
72 ISCSI_IWARP_TCP = 3,
73 ISCSI_IWARP_SCTP = 4,
74 ISCSI_INFINIBAND = 5,
75 };
76
77 /* RFC-3720 7.1.4 Standard Connection State Diagram for a Target */
78 enum target_conn_state_table {
79 TARG_CONN_STATE_FREE = 0x1,
80 TARG_CONN_STATE_XPT_UP = 0x3,
81 TARG_CONN_STATE_IN_LOGIN = 0x4,
82 TARG_CONN_STATE_LOGGED_IN = 0x5,
83 TARG_CONN_STATE_IN_LOGOUT = 0x6,
84 TARG_CONN_STATE_LOGOUT_REQUESTED = 0x7,
85 TARG_CONN_STATE_CLEANUP_WAIT = 0x8,
86 };
87
88 /* RFC-3720 7.3.2 Session State Diagram for a Target */
89 enum target_sess_state_table {
90 TARG_SESS_STATE_FREE = 0x1,
91 TARG_SESS_STATE_ACTIVE = 0x2,
92 TARG_SESS_STATE_LOGGED_IN = 0x3,
93 TARG_SESS_STATE_FAILED = 0x4,
94 TARG_SESS_STATE_IN_CONTINUE = 0x5,
95 };
96
97 /* struct iscsi_data_count->type */
98 enum data_count_type {
99 ISCSI_RX_DATA = 1,
100 ISCSI_TX_DATA = 2,
101 };
102
103 /* struct iscsi_datain_req->dr_complete */
104 enum datain_req_comp_table {
105 DATAIN_COMPLETE_NORMAL = 1,
106 DATAIN_COMPLETE_WITHIN_COMMAND_RECOVERY = 2,
107 DATAIN_COMPLETE_CONNECTION_RECOVERY = 3,
108 };
109
110 /* struct iscsi_datain_req->recovery */
111 enum datain_req_rec_table {
112 DATAIN_WITHIN_COMMAND_RECOVERY = 1,
113 DATAIN_CONNECTION_RECOVERY = 2,
114 };
115
116 /* struct iscsi_portal_group->state */
117 enum tpg_state_table {
118 TPG_STATE_FREE = 0,
119 TPG_STATE_ACTIVE = 1,
120 TPG_STATE_INACTIVE = 2,
121 TPG_STATE_COLD_RESET = 3,
122 };
123
124 /* struct iscsi_tiqn->tiqn_state */
125 enum tiqn_state_table {
126 TIQN_STATE_ACTIVE = 1,
127 TIQN_STATE_SHUTDOWN = 2,
128 };
129
130 /* struct iscsi_cmd->cmd_flags */
131 enum cmd_flags_table {
132 ICF_GOT_LAST_DATAOUT = 0x00000001,
133 ICF_GOT_DATACK_SNACK = 0x00000002,
134 ICF_NON_IMMEDIATE_UNSOLICITED_DATA = 0x00000004,
135 ICF_SENT_LAST_R2T = 0x00000008,
136 ICF_WITHIN_COMMAND_RECOVERY = 0x00000010,
137 ICF_CONTIG_MEMORY = 0x00000020,
138 ICF_ATTACHED_TO_RQUEUE = 0x00000040,
139 ICF_OOO_CMDSN = 0x00000080,
140 ICF_SENDTARGETS_ALL = 0x00000100,
141 ICF_SENDTARGETS_SINGLE = 0x00000200,
142 };
143
144 /* struct iscsi_cmd->i_state */
145 enum cmd_i_state_table {
146 ISTATE_NO_STATE = 0,
147 ISTATE_NEW_CMD = 1,
148 ISTATE_DEFERRED_CMD = 2,
149 ISTATE_UNSOLICITED_DATA = 3,
150 ISTATE_RECEIVE_DATAOUT = 4,
151 ISTATE_RECEIVE_DATAOUT_RECOVERY = 5,
152 ISTATE_RECEIVED_LAST_DATAOUT = 6,
153 ISTATE_WITHIN_DATAOUT_RECOVERY = 7,
154 ISTATE_IN_CONNECTION_RECOVERY = 8,
155 ISTATE_RECEIVED_TASKMGT = 9,
156 ISTATE_SEND_ASYNCMSG = 10,
157 ISTATE_SENT_ASYNCMSG = 11,
158 ISTATE_SEND_DATAIN = 12,
159 ISTATE_SEND_LAST_DATAIN = 13,
160 ISTATE_SENT_LAST_DATAIN = 14,
161 ISTATE_SEND_LOGOUTRSP = 15,
162 ISTATE_SENT_LOGOUTRSP = 16,
163 ISTATE_SEND_NOPIN = 17,
164 ISTATE_SENT_NOPIN = 18,
165 ISTATE_SEND_REJECT = 19,
166 ISTATE_SENT_REJECT = 20,
167 ISTATE_SEND_R2T = 21,
168 ISTATE_SENT_R2T = 22,
169 ISTATE_SEND_R2T_RECOVERY = 23,
170 ISTATE_SENT_R2T_RECOVERY = 24,
171 ISTATE_SEND_LAST_R2T = 25,
172 ISTATE_SENT_LAST_R2T = 26,
173 ISTATE_SEND_LAST_R2T_RECOVERY = 27,
174 ISTATE_SENT_LAST_R2T_RECOVERY = 28,
175 ISTATE_SEND_STATUS = 29,
176 ISTATE_SEND_STATUS_BROKEN_PC = 30,
177 ISTATE_SENT_STATUS = 31,
178 ISTATE_SEND_STATUS_RECOVERY = 32,
179 ISTATE_SENT_STATUS_RECOVERY = 33,
180 ISTATE_SEND_TASKMGTRSP = 34,
181 ISTATE_SENT_TASKMGTRSP = 35,
182 ISTATE_SEND_TEXTRSP = 36,
183 ISTATE_SENT_TEXTRSP = 37,
184 ISTATE_SEND_NOPIN_WANT_RESPONSE = 38,
185 ISTATE_SENT_NOPIN_WANT_RESPONSE = 39,
186 ISTATE_SEND_NOPIN_NO_RESPONSE = 40,
187 ISTATE_REMOVE = 41,
188 ISTATE_FREE = 42,
189 };
190
191 /* Used for iscsi_recover_cmdsn() return values */
192 enum recover_cmdsn_ret_table {
193 CMDSN_ERROR_CANNOT_RECOVER = -1,
194 CMDSN_NORMAL_OPERATION = 0,
195 CMDSN_LOWER_THAN_EXP = 1,
196 CMDSN_HIGHER_THAN_EXP = 2,
197 CMDSN_MAXCMDSN_OVERRUN = 3,
198 };
199
200 /* Used for iscsi_handle_immediate_data() return values */
201 enum immedate_data_ret_table {
202 IMMEDIATE_DATA_CANNOT_RECOVER = -1,
203 IMMEDIATE_DATA_NORMAL_OPERATION = 0,
204 IMMEDIATE_DATA_ERL1_CRC_FAILURE = 1,
205 };
206
207 /* Used for iscsi_decide_dataout_action() return values */
208 enum dataout_action_ret_table {
209 DATAOUT_CANNOT_RECOVER = -1,
210 DATAOUT_NORMAL = 0,
211 DATAOUT_SEND_R2T = 1,
212 DATAOUT_SEND_TO_TRANSPORT = 2,
213 DATAOUT_WITHIN_COMMAND_RECOVERY = 3,
214 };
215
216 /* Used for struct iscsi_node_auth->naf_flags */
217 enum naf_flags_table {
218 NAF_USERID_SET = 0x01,
219 NAF_PASSWORD_SET = 0x02,
220 NAF_USERID_IN_SET = 0x04,
221 NAF_PASSWORD_IN_SET = 0x08,
222 };
223
224 /* Used by various struct timer_list to manage iSCSI specific state */
225 enum iscsi_timer_flags_table {
226 ISCSI_TF_RUNNING = 0x01,
227 ISCSI_TF_STOP = 0x02,
228 ISCSI_TF_EXPIRED = 0x04,
229 };
230
231 /* Used for struct iscsi_np->np_flags */
232 enum np_flags_table {
233 NPF_IP_NETWORK = 0x00,
234 };
235
236 /* Used for struct iscsi_np->np_thread_state */
237 enum np_thread_state_table {
238 ISCSI_NP_THREAD_ACTIVE = 1,
239 ISCSI_NP_THREAD_INACTIVE = 2,
240 ISCSI_NP_THREAD_RESET = 3,
241 ISCSI_NP_THREAD_SHUTDOWN = 4,
242 ISCSI_NP_THREAD_EXIT = 5,
243 };
244
245 struct iscsi_conn_ops {
246 u8 HeaderDigest; /* [0,1] == [None,CRC32C] */
247 u8 DataDigest; /* [0,1] == [None,CRC32C] */
248 u32 MaxRecvDataSegmentLength; /* [512..2**24-1] */
249 u32 MaxXmitDataSegmentLength; /* [512..2**24-1] */
250 u8 OFMarker; /* [0,1] == [No,Yes] */
251 u8 IFMarker; /* [0,1] == [No,Yes] */
252 u32 OFMarkInt; /* [1..65535] */
253 u32 IFMarkInt; /* [1..65535] */
254 /*
255 * iSER specific connection parameters
256 */
257 u32 InitiatorRecvDataSegmentLength; /* [512..2**24-1] */
258 u32 TargetRecvDataSegmentLength; /* [512..2**24-1] */
259 };
260
261 struct iscsi_sess_ops {
262 char InitiatorName[224];
263 char InitiatorAlias[256];
264 char TargetName[224];
265 char TargetAlias[256];
266 char TargetAddress[256];
267 u16 TargetPortalGroupTag; /* [0..65535] */
268 u16 MaxConnections; /* [1..65535] */
269 u8 InitialR2T; /* [0,1] == [No,Yes] */
270 u8 ImmediateData; /* [0,1] == [No,Yes] */
271 u32 MaxBurstLength; /* [512..2**24-1] */
272 u32 FirstBurstLength; /* [512..2**24-1] */
273 u16 DefaultTime2Wait; /* [0..3600] */
274 u16 DefaultTime2Retain; /* [0..3600] */
275 u16 MaxOutstandingR2T; /* [1..65535] */
276 u8 DataPDUInOrder; /* [0,1] == [No,Yes] */
277 u8 DataSequenceInOrder; /* [0,1] == [No,Yes] */
278 u8 ErrorRecoveryLevel; /* [0..2] */
279 u8 SessionType; /* [0,1] == [Normal,Discovery]*/
280 /*
281 * iSER specific session parameters
282 */
283 u8 RDMAExtensions; /* [0,1] == [No,Yes] */
284 };
285
286 struct iscsi_queue_req {
287 int state;
288 struct iscsi_cmd *cmd;
289 struct list_head qr_list;
290 };
291
292 struct iscsi_data_count {
293 int data_length;
294 int sync_and_steering;
295 enum data_count_type type;
296 u32 iov_count;
297 u32 ss_iov_count;
298 u32 ss_marker_count;
299 struct kvec *iov;
300 };
301
302 struct iscsi_param_list {
303 bool iser;
304 struct list_head param_list;
305 struct list_head extra_response_list;
306 };
307
308 struct iscsi_datain_req {
309 enum datain_req_comp_table dr_complete;
310 int generate_recovery_values;
311 enum datain_req_rec_table recovery;
312 u32 begrun;
313 u32 runlength;
314 u32 data_length;
315 u32 data_offset;
316 u32 data_sn;
317 u32 next_burst_len;
318 u32 read_data_done;
319 u32 seq_send_order;
320 struct list_head cmd_datain_node;
321 } ____cacheline_aligned;
322
323 struct iscsi_ooo_cmdsn {
324 u16 cid;
325 u32 batch_count;
326 u32 cmdsn;
327 u32 exp_cmdsn;
328 struct iscsi_cmd *cmd;
329 struct list_head ooo_list;
330 } ____cacheline_aligned;
331
332 struct iscsi_datain {
333 u8 flags;
334 u32 data_sn;
335 u32 length;
336 u32 offset;
337 } ____cacheline_aligned;
338
339 struct iscsi_r2t {
340 int seq_complete;
341 int recovery_r2t;
342 int sent_r2t;
343 u32 r2t_sn;
344 u32 offset;
345 u32 targ_xfer_tag;
346 u32 xfer_len;
347 struct list_head r2t_list;
348 } ____cacheline_aligned;
349
350 struct iscsi_cmd {
351 enum iscsi_timer_flags_table dataout_timer_flags;
352 /* DataOUT timeout retries */
353 u8 dataout_timeout_retries;
354 /* Within command recovery count */
355 u8 error_recovery_count;
356 /* iSCSI dependent state for out or order CmdSNs */
357 enum cmd_i_state_table deferred_i_state;
358 /* iSCSI dependent state */
359 enum cmd_i_state_table i_state;
360 /* Command is an immediate command (ISCSI_OP_IMMEDIATE set) */
361 u8 immediate_cmd;
362 /* Immediate data present */
363 u8 immediate_data;
364 /* iSCSI Opcode */
365 u8 iscsi_opcode;
366 /* iSCSI Response Code */
367 u8 iscsi_response;
368 /* Logout reason when iscsi_opcode == ISCSI_INIT_LOGOUT_CMND */
369 u8 logout_reason;
370 /* Logout response code when iscsi_opcode == ISCSI_INIT_LOGOUT_CMND */
371 u8 logout_response;
372 /* MaxCmdSN has been incremented */
373 u8 maxcmdsn_inc;
374 /* Immediate Unsolicited Dataout */
375 u8 unsolicited_data;
376 /* Reject reason code */
377 u8 reject_reason;
378 /* CID contained in logout PDU when opcode == ISCSI_INIT_LOGOUT_CMND */
379 u16 logout_cid;
380 /* Command flags */
381 enum cmd_flags_table cmd_flags;
382 /* Initiator Task Tag assigned from Initiator */
383 itt_t init_task_tag;
384 /* Target Transfer Tag assigned from Target */
385 u32 targ_xfer_tag;
386 /* CmdSN assigned from Initiator */
387 u32 cmd_sn;
388 /* ExpStatSN assigned from Initiator */
389 u32 exp_stat_sn;
390 /* StatSN assigned to this ITT */
391 u32 stat_sn;
392 /* DataSN Counter */
393 u32 data_sn;
394 /* R2TSN Counter */
395 u32 r2t_sn;
396 /* Last DataSN acknowledged via DataAck SNACK */
397 u32 acked_data_sn;
398 /* Used for echoing NOPOUT ping data */
399 u32 buf_ptr_size;
400 /* Used to store DataDigest */
401 u32 data_crc;
402 /* Counter for MaxOutstandingR2T */
403 u32 outstanding_r2ts;
404 /* Next R2T Offset when DataSequenceInOrder=Yes */
405 u32 r2t_offset;
406 /* Iovec current and orig count for iscsi_cmd->iov_data */
407 u32 iov_data_count;
408 u32 orig_iov_data_count;
409 /* Number of miscellaneous iovecs used for IP stack calls */
410 u32 iov_misc_count;
411 /* Number of struct iscsi_pdu in struct iscsi_cmd->pdu_list */
412 u32 pdu_count;
413 /* Next struct iscsi_pdu to send in struct iscsi_cmd->pdu_list */
414 u32 pdu_send_order;
415 /* Current struct iscsi_pdu in struct iscsi_cmd->pdu_list */
416 u32 pdu_start;
417 /* Next struct iscsi_seq to send in struct iscsi_cmd->seq_list */
418 u32 seq_send_order;
419 /* Number of struct iscsi_seq in struct iscsi_cmd->seq_list */
420 u32 seq_count;
421 /* Current struct iscsi_seq in struct iscsi_cmd->seq_list */
422 u32 seq_no;
423 /* Lowest offset in current DataOUT sequence */
424 u32 seq_start_offset;
425 /* Highest offset in current DataOUT sequence */
426 u32 seq_end_offset;
427 /* Total size in bytes received so far of READ data */
428 u32 read_data_done;
429 /* Total size in bytes received so far of WRITE data */
430 u32 write_data_done;
431 /* Counter for FirstBurstLength key */
432 u32 first_burst_len;
433 /* Counter for MaxBurstLength key */
434 u32 next_burst_len;
435 /* Transfer size used for IP stack calls */
436 u32 tx_size;
437 /* Buffer used for various purposes */
438 void *buf_ptr;
439 /* Used by SendTargets=[iqn.,eui.] discovery */
440 void *text_in_ptr;
441 /* See include/linux/dma-mapping.h */
442 enum dma_data_direction data_direction;
443 /* iSCSI PDU Header + CRC */
444 unsigned char pdu[ISCSI_HDR_LEN + ISCSI_CRC_LEN];
445 /* Number of times struct iscsi_cmd is present in immediate queue */
446 atomic_t immed_queue_count;
447 atomic_t response_queue_count;
448 spinlock_t datain_lock;
449 spinlock_t dataout_timeout_lock;
450 /* spinlock for protecting struct iscsi_cmd->i_state */
451 spinlock_t istate_lock;
452 /* spinlock for adding within command recovery entries */
453 spinlock_t error_lock;
454 /* spinlock for adding R2Ts */
455 spinlock_t r2t_lock;
456 /* DataIN List */
457 struct list_head datain_list;
458 /* R2T List */
459 struct list_head cmd_r2t_list;
460 /* Timer for DataOUT */
461 struct timer_list dataout_timer;
462 /* Iovecs for SCSI data payload RX/TX w/ kernel level sockets */
463 struct kvec *iov_data;
464 /* Iovecs for miscellaneous purposes */
465 #define ISCSI_MISC_IOVECS 5
466 struct kvec iov_misc[ISCSI_MISC_IOVECS];
467 /* Array of struct iscsi_pdu used for DataPDUInOrder=No */
468 struct iscsi_pdu *pdu_list;
469 /* Current struct iscsi_pdu used for DataPDUInOrder=No */
470 struct iscsi_pdu *pdu_ptr;
471 /* Array of struct iscsi_seq used for DataSequenceInOrder=No */
472 struct iscsi_seq *seq_list;
473 /* Current struct iscsi_seq used for DataSequenceInOrder=No */
474 struct iscsi_seq *seq_ptr;
475 /* TMR Request when iscsi_opcode == ISCSI_OP_SCSI_TMFUNC */
476 struct iscsi_tmr_req *tmr_req;
477 /* Connection this command is alligient to */
478 struct iscsi_conn *conn;
479 /* Pointer to connection recovery entry */
480 struct iscsi_conn_recovery *cr;
481 /* Session the command is part of, used for connection recovery */
482 struct iscsi_session *sess;
483 /* list_head for connection list */
484 struct list_head i_conn_node;
485 /* The TCM I/O descriptor that is accessed via container_of() */
486 struct se_cmd se_cmd;
487 /* Sense buffer that will be mapped into outgoing status */
488 #define ISCSI_SENSE_BUFFER_LEN (TRANSPORT_SENSE_BUFFER + 2)
489 unsigned char sense_buffer[ISCSI_SENSE_BUFFER_LEN];
490
491 u32 padding;
492 u8 pad_bytes[4];
493
494 struct scatterlist *first_data_sg;
495 u32 first_data_sg_off;
496 u32 kmapped_nents;
497 sense_reason_t sense_reason;
498 } ____cacheline_aligned;
499
500 struct iscsi_tmr_req {
501 bool task_reassign:1;
502 u32 exp_data_sn;
503 struct iscsi_cmd *ref_cmd;
504 struct iscsi_conn_recovery *conn_recovery;
505 struct se_tmr_req *se_tmr_req;
506 };
507
508 struct iscsi_conn {
509 wait_queue_head_t queues_wq;
510 /* Authentication Successful for this connection */
511 u8 auth_complete;
512 /* State connection is currently in */
513 u8 conn_state;
514 u8 conn_logout_reason;
515 u8 network_transport;
516 enum iscsi_timer_flags_table nopin_timer_flags;
517 enum iscsi_timer_flags_table nopin_response_timer_flags;
518 /* Used to know what thread encountered a transport failure */
519 u8 which_thread;
520 /* connection id assigned by the Initiator */
521 u16 cid;
522 /* Remote TCP Port */
523 u16 login_port;
524 u16 local_port;
525 int net_size;
526 int login_family;
527 u32 auth_id;
528 u32 conn_flags;
529 /* Used for iscsi_tx_login_rsp() */
530 itt_t login_itt;
531 u32 exp_statsn;
532 /* Per connection status sequence number */
533 u32 stat_sn;
534 /* IFMarkInt's Current Value */
535 u32 if_marker;
536 /* OFMarkInt's Current Value */
537 u32 of_marker;
538 /* Used for calculating OFMarker offset to next PDU */
539 u32 of_marker_offset;
540 #define IPV6_ADDRESS_SPACE 48
541 unsigned char login_ip[IPV6_ADDRESS_SPACE];
542 unsigned char local_ip[IPV6_ADDRESS_SPACE];
543 int conn_usage_count;
544 int conn_waiting_on_uc;
545 atomic_t check_immediate_queue;
546 atomic_t conn_logout_remove;
547 atomic_t connection_exit;
548 atomic_t connection_recovery;
549 atomic_t connection_reinstatement;
550 atomic_t connection_wait_rcfr;
551 atomic_t sleep_on_conn_wait_comp;
552 atomic_t transport_failed;
553 struct completion conn_post_wait_comp;
554 struct completion conn_wait_comp;
555 struct completion conn_wait_rcfr_comp;
556 struct completion conn_waiting_on_uc_comp;
557 struct completion conn_logout_comp;
558 struct completion tx_half_close_comp;
559 struct completion rx_half_close_comp;
560 /* socket used by this connection */
561 struct socket *sock;
562 void (*orig_data_ready)(struct sock *);
563 void (*orig_state_change)(struct sock *);
564 #define LOGIN_FLAGS_READ_ACTIVE 1
565 #define LOGIN_FLAGS_CLOSED 2
566 #define LOGIN_FLAGS_READY 4
567 unsigned long login_flags;
568 struct delayed_work login_work;
569 struct delayed_work login_cleanup_work;
570 struct iscsi_login *login;
571 struct timer_list nopin_timer;
572 struct timer_list nopin_response_timer;
573 struct timer_list transport_timer;
574 struct task_struct *login_kworker;
575 /* Spinlock used for add/deleting cmd's from conn_cmd_list */
576 spinlock_t cmd_lock;
577 spinlock_t conn_usage_lock;
578 spinlock_t immed_queue_lock;
579 spinlock_t nopin_timer_lock;
580 spinlock_t response_queue_lock;
581 spinlock_t state_lock;
582 /* libcrypto RX and TX contexts for crc32c */
583 struct hash_desc conn_rx_hash;
584 struct hash_desc conn_tx_hash;
585 /* Used for scheduling TX and RX connection kthreads */
586 cpumask_var_t conn_cpumask;
587 unsigned int conn_rx_reset_cpumask:1;
588 unsigned int conn_tx_reset_cpumask:1;
589 /* list_head of struct iscsi_cmd for this connection */
590 struct list_head conn_cmd_list;
591 struct list_head immed_queue_list;
592 struct list_head response_queue_list;
593 struct iscsi_conn_ops *conn_ops;
594 struct iscsi_login *conn_login;
595 struct iscsit_transport *conn_transport;
596 struct iscsi_param_list *param_list;
597 /* Used for per connection auth state machine */
598 void *auth_protocol;
599 void *context;
600 struct iscsi_login_thread_s *login_thread;
601 struct iscsi_portal_group *tpg;
602 struct iscsi_tpg_np *tpg_np;
603 /* Pointer to parent session */
604 struct iscsi_session *sess;
605 int bitmap_id;
606 int rx_thread_active;
607 struct task_struct *rx_thread;
608 int tx_thread_active;
609 struct task_struct *tx_thread;
610 /* list_head for session connection list */
611 struct list_head conn_list;
612 } ____cacheline_aligned;
613
614 struct iscsi_conn_recovery {
615 u16 cid;
616 u32 cmd_count;
617 u32 maxrecvdatasegmentlength;
618 u32 maxxmitdatasegmentlength;
619 int ready_for_reallegiance;
620 struct list_head conn_recovery_cmd_list;
621 spinlock_t conn_recovery_cmd_lock;
622 struct timer_list time2retain_timer;
623 struct iscsi_session *sess;
624 struct list_head cr_list;
625 } ____cacheline_aligned;
626
627 struct iscsi_session {
628 u8 initiator_vendor;
629 u8 isid[6];
630 enum iscsi_timer_flags_table time2retain_timer_flags;
631 u8 version_active;
632 u16 cid_called;
633 u16 conn_recovery_count;
634 u16 tsih;
635 /* state session is currently in */
636 u32 session_state;
637 /* session wide counter: initiator assigned task tag */
638 itt_t init_task_tag;
639 /* session wide counter: target assigned task tag */
640 u32 targ_xfer_tag;
641 u32 cmdsn_window;
642
643 /* protects cmdsn values */
644 struct mutex cmdsn_mutex;
645 /* session wide counter: expected command sequence number */
646 u32 exp_cmd_sn;
647 /* session wide counter: maximum allowed command sequence number */
648 u32 max_cmd_sn;
649 struct list_head sess_ooo_cmdsn_list;
650
651 /* LIO specific session ID */
652 u32 sid;
653 char auth_type[8];
654 /* unique within the target */
655 int session_index;
656 /* Used for session reference counting */
657 int session_usage_count;
658 int session_waiting_on_uc;
659 atomic_long_t cmd_pdus;
660 atomic_long_t rsp_pdus;
661 atomic_long_t tx_data_octets;
662 atomic_long_t rx_data_octets;
663 atomic_long_t conn_digest_errors;
664 atomic_long_t conn_timeout_errors;
665 u64 creation_time;
666 /* Number of active connections */
667 atomic_t nconn;
668 atomic_t session_continuation;
669 atomic_t session_fall_back_to_erl0;
670 atomic_t session_logout;
671 atomic_t session_reinstatement;
672 atomic_t session_stop_active;
673 atomic_t sleep_on_sess_wait_comp;
674 /* connection list */
675 struct list_head sess_conn_list;
676 struct list_head cr_active_list;
677 struct list_head cr_inactive_list;
678 spinlock_t conn_lock;
679 spinlock_t cr_a_lock;
680 spinlock_t cr_i_lock;
681 spinlock_t session_usage_lock;
682 spinlock_t ttt_lock;
683 struct completion async_msg_comp;
684 struct completion reinstatement_comp;
685 struct completion session_wait_comp;
686 struct completion session_waiting_on_uc_comp;
687 struct timer_list time2retain_timer;
688 struct iscsi_sess_ops *sess_ops;
689 struct se_session *se_sess;
690 struct iscsi_portal_group *tpg;
691 } ____cacheline_aligned;
692
693 struct iscsi_login {
694 u8 auth_complete;
695 u8 checked_for_existing;
696 u8 current_stage;
697 u8 leading_connection;
698 u8 first_request;
699 u8 version_min;
700 u8 version_max;
701 u8 login_complete;
702 u8 login_failed;
703 bool zero_tsih;
704 char isid[6];
705 u32 cmd_sn;
706 itt_t init_task_tag;
707 u32 initial_exp_statsn;
708 u32 rsp_length;
709 u16 cid;
710 u16 tsih;
711 char req[ISCSI_HDR_LEN];
712 char rsp[ISCSI_HDR_LEN];
713 char *req_buf;
714 char *rsp_buf;
715 struct iscsi_conn *conn;
716 struct iscsi_np *np;
717 } ____cacheline_aligned;
718
719 struct iscsi_node_attrib {
720 u32 dataout_timeout;
721 u32 dataout_timeout_retries;
722 u32 default_erl;
723 u32 nopin_timeout;
724 u32 nopin_response_timeout;
725 u32 random_datain_pdu_offsets;
726 u32 random_datain_seq_offsets;
727 u32 random_r2t_offsets;
728 u32 tmr_cold_reset;
729 u32 tmr_warm_reset;
730 struct iscsi_node_acl *nacl;
731 };
732
733 struct se_dev_entry_s;
734
735 struct iscsi_node_auth {
736 enum naf_flags_table naf_flags;
737 int authenticate_target;
738 /* Used for iscsit_global->discovery_auth,
739 * set to zero (auth disabled) by default */
740 int enforce_discovery_auth;
741 #define MAX_USER_LEN 256
742 #define MAX_PASS_LEN 256
743 char userid[MAX_USER_LEN];
744 char password[MAX_PASS_LEN];
745 char userid_mutual[MAX_USER_LEN];
746 char password_mutual[MAX_PASS_LEN];
747 };
748
749 #include "iscsi_target_stat.h"
750
751 struct iscsi_node_stat_grps {
752 struct config_group iscsi_sess_stats_group;
753 struct config_group iscsi_conn_stats_group;
754 };
755
756 struct iscsi_node_acl {
757 struct iscsi_node_attrib node_attrib;
758 struct iscsi_node_auth node_auth;
759 struct iscsi_node_stat_grps node_stat_grps;
760 struct se_node_acl se_node_acl;
761 };
762
763 struct iscsi_tpg_attrib {
764 u32 authentication;
765 u32 login_timeout;
766 u32 netif_timeout;
767 u32 generate_node_acls;
768 u32 cache_dynamic_acls;
769 u32 default_cmdsn_depth;
770 u32 demo_mode_write_protect;
771 u32 prod_mode_write_protect;
772 u32 demo_mode_discovery;
773 u32 default_erl;
774 u8 t10_pi;
775 u32 fabric_prot_type;
776 struct iscsi_portal_group *tpg;
777 };
778
779 struct iscsi_np {
780 int np_network_transport;
781 int np_ip_proto;
782 int np_sock_type;
783 enum np_thread_state_table np_thread_state;
784 bool enabled;
785 enum iscsi_timer_flags_table np_login_timer_flags;
786 u32 np_exports;
787 enum np_flags_table np_flags;
788 unsigned char np_ip[IPV6_ADDRESS_SPACE];
789 u16 np_port;
790 spinlock_t np_thread_lock;
791 struct completion np_restart_comp;
792 struct socket *np_socket;
793 struct __kernel_sockaddr_storage np_sockaddr;
794 struct task_struct *np_thread;
795 struct timer_list np_login_timer;
796 void *np_context;
797 struct iscsit_transport *np_transport;
798 struct list_head np_list;
799 } ____cacheline_aligned;
800
801 struct iscsi_tpg_np {
802 struct iscsi_np *tpg_np;
803 struct iscsi_portal_group *tpg;
804 struct iscsi_tpg_np *tpg_np_parent;
805 struct list_head tpg_np_list;
806 struct list_head tpg_np_child_list;
807 struct list_head tpg_np_parent_list;
808 struct se_tpg_np se_tpg_np;
809 spinlock_t tpg_np_parent_lock;
810 struct completion tpg_np_comp;
811 struct kref tpg_np_kref;
812 };
813
814 struct iscsi_portal_group {
815 unsigned char tpg_chap_id;
816 /* TPG State */
817 enum tpg_state_table tpg_state;
818 /* Target Portal Group Tag */
819 u16 tpgt;
820 /* Id assigned to target sessions */
821 u16 ntsih;
822 /* Number of active sessions */
823 u32 nsessions;
824 /* Number of Network Portals available for this TPG */
825 u32 num_tpg_nps;
826 /* Per TPG LIO specific session ID. */
827 u32 sid;
828 /* Spinlock for adding/removing Network Portals */
829 spinlock_t tpg_np_lock;
830 spinlock_t tpg_state_lock;
831 struct se_portal_group tpg_se_tpg;
832 struct mutex tpg_access_lock;
833 struct semaphore np_login_sem;
834 struct iscsi_tpg_attrib tpg_attrib;
835 struct iscsi_node_auth tpg_demo_auth;
836 /* Pointer to default list of iSCSI parameters for TPG */
837 struct iscsi_param_list *param_list;
838 struct iscsi_tiqn *tpg_tiqn;
839 struct list_head tpg_gnp_list;
840 struct list_head tpg_list;
841 } ____cacheline_aligned;
842
843 struct iscsi_wwn_stat_grps {
844 struct config_group iscsi_stat_group;
845 struct config_group iscsi_instance_group;
846 struct config_group iscsi_sess_err_group;
847 struct config_group iscsi_tgt_attr_group;
848 struct config_group iscsi_login_stats_group;
849 struct config_group iscsi_logout_stats_group;
850 };
851
852 struct iscsi_tiqn {
853 #define ISCSI_IQN_LEN 224
854 unsigned char tiqn[ISCSI_IQN_LEN];
855 enum tiqn_state_table tiqn_state;
856 int tiqn_access_count;
857 u32 tiqn_active_tpgs;
858 u32 tiqn_ntpgs;
859 u32 tiqn_num_tpg_nps;
860 u32 tiqn_nsessions;
861 struct list_head tiqn_list;
862 struct list_head tiqn_tpg_list;
863 spinlock_t tiqn_state_lock;
864 spinlock_t tiqn_tpg_lock;
865 struct se_wwn tiqn_wwn;
866 struct iscsi_wwn_stat_grps tiqn_stat_grps;
867 int tiqn_index;
868 struct iscsi_sess_err_stats sess_err_stats;
869 struct iscsi_login_stats login_stats;
870 struct iscsi_logout_stats logout_stats;
871 } ____cacheline_aligned;
872
873 struct iscsit_global {
874 /* In core shutdown */
875 u32 in_shutdown;
876 u32 active_ts;
877 /* Unique identifier used for the authentication daemon */
878 u32 auth_id;
879 u32 inactive_ts;
880 #define ISCSIT_BITMAP_BITS 262144
881 /* Thread Set bitmap pointer */
882 unsigned long *ts_bitmap;
883 spinlock_t ts_bitmap_lock;
884 /* Used for iSCSI discovery session authentication */
885 struct iscsi_node_acl discovery_acl;
886 struct iscsi_portal_group *discovery_tpg;
887 };
888
889 static inline u32 session_get_next_ttt(struct iscsi_session *session)
890 {
891 u32 ttt;
892
893 spin_lock_bh(&session->ttt_lock);
894 ttt = session->targ_xfer_tag++;
895 if (ttt == 0xFFFFFFFF)
896 ttt = session->targ_xfer_tag++;
897 spin_unlock_bh(&session->ttt_lock);
898
899 return ttt;
900 }
901
902 extern struct iscsi_cmd *iscsit_find_cmd_from_itt(struct iscsi_conn *, itt_t);
903 #endif /* ISCSI_TARGET_CORE_H */
Linux kernel - Deliverables
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