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