?  search:
summary | log | graphiclog1 | graphiclog2 | commit | commitdiff | tree | refs | edit | fork
blame | history | raw | HEAD
Merge branch 'fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/evalenti/linux...
[linux/fpc-iii.git] / include / target / iscsi / iscsi_target_core.h
blobc3371fa548cb9b3b30c563e89de65e9fce7fb585
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 /* TPG status needs to be enabled to return sendtargets discovery endpoint info */
66 #define TA_DEFAULT_TPG_ENABLED_SENDTARGETS 1
67
68 #define ISCSI_IOV_DATA_BUFFER 5
69
70 enum iscsit_transport_type {
71 ISCSI_TCP = 0,
72 ISCSI_SCTP_TCP = 1,
73 ISCSI_SCTP_UDP = 2,
74 ISCSI_IWARP_TCP = 3,
75 ISCSI_IWARP_SCTP = 4,
76 ISCSI_INFINIBAND = 5,
77 };
78
79 /* RFC-3720 7.1.4 Standard Connection State Diagram for a Target */
80 enum target_conn_state_table {
81 TARG_CONN_STATE_FREE = 0x1,
82 TARG_CONN_STATE_XPT_UP = 0x3,
83 TARG_CONN_STATE_IN_LOGIN = 0x4,
84 TARG_CONN_STATE_LOGGED_IN = 0x5,
85 TARG_CONN_STATE_IN_LOGOUT = 0x6,
86 TARG_CONN_STATE_LOGOUT_REQUESTED = 0x7,
87 TARG_CONN_STATE_CLEANUP_WAIT = 0x8,
88 };
89
90 /* RFC-3720 7.3.2 Session State Diagram for a Target */
91 enum target_sess_state_table {
92 TARG_SESS_STATE_FREE = 0x1,
93 TARG_SESS_STATE_ACTIVE = 0x2,
94 TARG_SESS_STATE_LOGGED_IN = 0x3,
95 TARG_SESS_STATE_FAILED = 0x4,
96 TARG_SESS_STATE_IN_CONTINUE = 0x5,
97 };
98
99 /* struct iscsi_data_count->type */
100 enum data_count_type {
101 ISCSI_RX_DATA = 1,
102 ISCSI_TX_DATA = 2,
103 };
104
105 /* struct iscsi_datain_req->dr_complete */
106 enum datain_req_comp_table {
107 DATAIN_COMPLETE_NORMAL = 1,
108 DATAIN_COMPLETE_WITHIN_COMMAND_RECOVERY = 2,
109 DATAIN_COMPLETE_CONNECTION_RECOVERY = 3,
110 };
111
112 /* struct iscsi_datain_req->recovery */
113 enum datain_req_rec_table {
114 DATAIN_WITHIN_COMMAND_RECOVERY = 1,
115 DATAIN_CONNECTION_RECOVERY = 2,
116 };
117
118 /* struct iscsi_portal_group->state */
119 enum tpg_state_table {
120 TPG_STATE_FREE = 0,
121 TPG_STATE_ACTIVE = 1,
122 TPG_STATE_INACTIVE = 2,
123 TPG_STATE_COLD_RESET = 3,
124 };
125
126 /* struct iscsi_tiqn->tiqn_state */
127 enum tiqn_state_table {
128 TIQN_STATE_ACTIVE = 1,
129 TIQN_STATE_SHUTDOWN = 2,
130 };
131
132 /* struct iscsi_cmd->cmd_flags */
133 enum cmd_flags_table {
134 ICF_GOT_LAST_DATAOUT = 0x00000001,
135 ICF_GOT_DATACK_SNACK = 0x00000002,
136 ICF_NON_IMMEDIATE_UNSOLICITED_DATA = 0x00000004,
137 ICF_SENT_LAST_R2T = 0x00000008,
138 ICF_WITHIN_COMMAND_RECOVERY = 0x00000010,
139 ICF_CONTIG_MEMORY = 0x00000020,
140 ICF_ATTACHED_TO_RQUEUE = 0x00000040,
141 ICF_OOO_CMDSN = 0x00000080,
142 ICF_SENDTARGETS_ALL = 0x00000100,
143 ICF_SENDTARGETS_SINGLE = 0x00000200,
144 };
145
146 /* struct iscsi_cmd->i_state */
147 enum cmd_i_state_table {
148 ISTATE_NO_STATE = 0,
149 ISTATE_NEW_CMD = 1,
150 ISTATE_DEFERRED_CMD = 2,
151 ISTATE_UNSOLICITED_DATA = 3,
152 ISTATE_RECEIVE_DATAOUT = 4,
153 ISTATE_RECEIVE_DATAOUT_RECOVERY = 5,
154 ISTATE_RECEIVED_LAST_DATAOUT = 6,
155 ISTATE_WITHIN_DATAOUT_RECOVERY = 7,
156 ISTATE_IN_CONNECTION_RECOVERY = 8,
157 ISTATE_RECEIVED_TASKMGT = 9,
158 ISTATE_SEND_ASYNCMSG = 10,
159 ISTATE_SENT_ASYNCMSG = 11,
160 ISTATE_SEND_DATAIN = 12,
161 ISTATE_SEND_LAST_DATAIN = 13,
162 ISTATE_SENT_LAST_DATAIN = 14,
163 ISTATE_SEND_LOGOUTRSP = 15,
164 ISTATE_SENT_LOGOUTRSP = 16,
165 ISTATE_SEND_NOPIN = 17,
166 ISTATE_SENT_NOPIN = 18,
167 ISTATE_SEND_REJECT = 19,
168 ISTATE_SENT_REJECT = 20,
169 ISTATE_SEND_R2T = 21,
170 ISTATE_SENT_R2T = 22,
171 ISTATE_SEND_R2T_RECOVERY = 23,
172 ISTATE_SENT_R2T_RECOVERY = 24,
173 ISTATE_SEND_LAST_R2T = 25,
174 ISTATE_SENT_LAST_R2T = 26,
175 ISTATE_SEND_LAST_R2T_RECOVERY = 27,
176 ISTATE_SENT_LAST_R2T_RECOVERY = 28,
177 ISTATE_SEND_STATUS = 29,
178 ISTATE_SEND_STATUS_BROKEN_PC = 30,
179 ISTATE_SENT_STATUS = 31,
180 ISTATE_SEND_STATUS_RECOVERY = 32,
181 ISTATE_SENT_STATUS_RECOVERY = 33,
182 ISTATE_SEND_TASKMGTRSP = 34,
183 ISTATE_SENT_TASKMGTRSP = 35,
184 ISTATE_SEND_TEXTRSP = 36,
185 ISTATE_SENT_TEXTRSP = 37,
186 ISTATE_SEND_NOPIN_WANT_RESPONSE = 38,
187 ISTATE_SENT_NOPIN_WANT_RESPONSE = 39,
188 ISTATE_SEND_NOPIN_NO_RESPONSE = 40,
189 ISTATE_REMOVE = 41,
190 ISTATE_FREE = 42,
191 };
192
193 /* Used for iscsi_recover_cmdsn() return values */
194 enum recover_cmdsn_ret_table {
195 CMDSN_ERROR_CANNOT_RECOVER = -1,
196 CMDSN_NORMAL_OPERATION = 0,
197 CMDSN_LOWER_THAN_EXP = 1,
198 CMDSN_HIGHER_THAN_EXP = 2,
199 CMDSN_MAXCMDSN_OVERRUN = 3,
200 };
201
202 /* Used for iscsi_handle_immediate_data() return values */
203 enum immedate_data_ret_table {
204 IMMEDIATE_DATA_CANNOT_RECOVER = -1,
205 IMMEDIATE_DATA_NORMAL_OPERATION = 0,
206 IMMEDIATE_DATA_ERL1_CRC_FAILURE = 1,
207 };
208
209 /* Used for iscsi_decide_dataout_action() return values */
210 enum dataout_action_ret_table {
211 DATAOUT_CANNOT_RECOVER = -1,
212 DATAOUT_NORMAL = 0,
213 DATAOUT_SEND_R2T = 1,
214 DATAOUT_SEND_TO_TRANSPORT = 2,
215 DATAOUT_WITHIN_COMMAND_RECOVERY = 3,
216 };
217
218 /* Used for struct iscsi_node_auth->naf_flags */
219 enum naf_flags_table {
220 NAF_USERID_SET = 0x01,
221 NAF_PASSWORD_SET = 0x02,
222 NAF_USERID_IN_SET = 0x04,
223 NAF_PASSWORD_IN_SET = 0x08,
224 };
225
226 /* Used by various struct timer_list to manage iSCSI specific state */
227 enum iscsi_timer_flags_table {
228 ISCSI_TF_RUNNING = 0x01,
229 ISCSI_TF_STOP = 0x02,
230 ISCSI_TF_EXPIRED = 0x04,
231 };
232
233 /* Used for struct iscsi_np->np_flags */
234 enum np_flags_table {
235 NPF_IP_NETWORK = 0x00,
236 };
237
238 /* Used for struct iscsi_np->np_thread_state */
239 enum np_thread_state_table {
240 ISCSI_NP_THREAD_ACTIVE = 1,
241 ISCSI_NP_THREAD_INACTIVE = 2,
242 ISCSI_NP_THREAD_RESET = 3,
243 ISCSI_NP_THREAD_SHUTDOWN = 4,
244 ISCSI_NP_THREAD_EXIT = 5,
245 };
246
247 struct iscsi_conn_ops {
248 u8 HeaderDigest; /* [0,1] == [None,CRC32C] */
249 u8 DataDigest; /* [0,1] == [None,CRC32C] */
250 u32 MaxRecvDataSegmentLength; /* [512..2**24-1] */
251 u32 MaxXmitDataSegmentLength; /* [512..2**24-1] */
252 /*
253 * iSER specific connection parameters
254 */
255 u32 InitiatorRecvDataSegmentLength; /* [512..2**24-1] */
256 u32 TargetRecvDataSegmentLength; /* [512..2**24-1] */
257 };
258
259 struct iscsi_sess_ops {
260 char InitiatorName[224];
261 char InitiatorAlias[256];
262 char TargetName[224];
263 char TargetAlias[256];
264 char TargetAddress[256];
265 u16 TargetPortalGroupTag; /* [0..65535] */
266 u16 MaxConnections; /* [1..65535] */
267 u8 InitialR2T; /* [0,1] == [No,Yes] */
268 u8 ImmediateData; /* [0,1] == [No,Yes] */
269 u32 MaxBurstLength; /* [512..2**24-1] */
270 u32 FirstBurstLength; /* [512..2**24-1] */
271 u16 DefaultTime2Wait; /* [0..3600] */
272 u16 DefaultTime2Retain; /* [0..3600] */
273 u16 MaxOutstandingR2T; /* [1..65535] */
274 u8 DataPDUInOrder; /* [0,1] == [No,Yes] */
275 u8 DataSequenceInOrder; /* [0,1] == [No,Yes] */
276 u8 ErrorRecoveryLevel; /* [0..2] */
277 u8 SessionType; /* [0,1] == [Normal,Discovery]*/
278 /*
279 * iSER specific session parameters
280 */
281 u8 RDMAExtensions; /* [0,1] == [No,Yes] */
282 };
283
284 struct iscsi_queue_req {
285 int state;
286 struct iscsi_cmd *cmd;
287 struct list_head qr_list;
288 };
289
290 struct iscsi_data_count {
291 int data_length;
292 int sync_and_steering;
293 enum data_count_type type;
294 u32 iov_count;
295 u32 ss_iov_count;
296 u32 ss_marker_count;
297 struct kvec *iov;
298 };
299
300 struct iscsi_param_list {
301 bool iser;
302 struct list_head param_list;
303 struct list_head extra_response_list;
304 };
305
306 struct iscsi_datain_req {
307 enum datain_req_comp_table dr_complete;
308 int generate_recovery_values;
309 enum datain_req_rec_table recovery;
310 u32 begrun;
311 u32 runlength;
312 u32 data_length;
313 u32 data_offset;
314 u32 data_sn;
315 u32 next_burst_len;
316 u32 read_data_done;
317 u32 seq_send_order;
318 struct list_head cmd_datain_node;
319 } ____cacheline_aligned;
320
321 struct iscsi_ooo_cmdsn {
322 u16 cid;
323 u32 batch_count;
324 u32 cmdsn;
325 u32 exp_cmdsn;
326 struct iscsi_cmd *cmd;
327 struct list_head ooo_list;
328 } ____cacheline_aligned;
329
330 struct iscsi_datain {
331 u8 flags;
332 u32 data_sn;
333 u32 length;
334 u32 offset;
335 } ____cacheline_aligned;
336
337 struct iscsi_r2t {
338 int seq_complete;
339 int recovery_r2t;
340 int sent_r2t;
341 u32 r2t_sn;
342 u32 offset;
343 u32 targ_xfer_tag;
344 u32 xfer_len;
345 struct list_head r2t_list;
346 } ____cacheline_aligned;
347
348 struct iscsi_cmd {
349 enum iscsi_timer_flags_table dataout_timer_flags;
350 /* DataOUT timeout retries */
351 u8 dataout_timeout_retries;
352 /* Within command recovery count */
353 u8 error_recovery_count;
354 /* iSCSI dependent state for out or order CmdSNs */
355 enum cmd_i_state_table deferred_i_state;
356 /* iSCSI dependent state */
357 enum cmd_i_state_table i_state;
358 /* Command is an immediate command (ISCSI_OP_IMMEDIATE set) */
359 u8 immediate_cmd;
360 /* Immediate data present */
361 u8 immediate_data;
362 /* iSCSI Opcode */
363 u8 iscsi_opcode;
364 /* iSCSI Response Code */
365 u8 iscsi_response;
366 /* Logout reason when iscsi_opcode == ISCSI_INIT_LOGOUT_CMND */
367 u8 logout_reason;
368 /* Logout response code when iscsi_opcode == ISCSI_INIT_LOGOUT_CMND */
369 u8 logout_response;
370 /* MaxCmdSN has been incremented */
371 u8 maxcmdsn_inc;
372 /* Immediate Unsolicited Dataout */
373 u8 unsolicited_data;
374 /* Reject reason code */
375 u8 reject_reason;
376 /* CID contained in logout PDU when opcode == ISCSI_INIT_LOGOUT_CMND */
377 u16 logout_cid;
378 /* Command flags */
379 enum cmd_flags_table cmd_flags;
380 /* Initiator Task Tag assigned from Initiator */
381 itt_t init_task_tag;
382 /* Target Transfer Tag assigned from Target */
383 u32 targ_xfer_tag;
384 /* CmdSN assigned from Initiator */
385 u32 cmd_sn;
386 /* ExpStatSN assigned from Initiator */
387 u32 exp_stat_sn;
388 /* StatSN assigned to this ITT */
389 u32 stat_sn;
390 /* DataSN Counter */
391 u32 data_sn;
392 /* R2TSN Counter */
393 u32 r2t_sn;
394 /* Last DataSN acknowledged via DataAck SNACK */
395 u32 acked_data_sn;
396 /* Used for echoing NOPOUT ping data */
397 u32 buf_ptr_size;
398 /* Used to store DataDigest */
399 u32 data_crc;
400 /* Counter for MaxOutstandingR2T */
401 u32 outstanding_r2ts;
402 /* Next R2T Offset when DataSequenceInOrder=Yes */
403 u32 r2t_offset;
404 /* Iovec current and orig count for iscsi_cmd->iov_data */
405 u32 iov_data_count;
406 u32 orig_iov_data_count;
407 /* Number of miscellaneous iovecs used for IP stack calls */
408 u32 iov_misc_count;
409 /* Number of struct iscsi_pdu in struct iscsi_cmd->pdu_list */
410 u32 pdu_count;
411 /* Next struct iscsi_pdu to send in struct iscsi_cmd->pdu_list */
412 u32 pdu_send_order;
413 /* Current struct iscsi_pdu in struct iscsi_cmd->pdu_list */
414 u32 pdu_start;
415 /* Next struct iscsi_seq to send in struct iscsi_cmd->seq_list */
416 u32 seq_send_order;
417 /* Number of struct iscsi_seq in struct iscsi_cmd->seq_list */
418 u32 seq_count;
419 /* Current struct iscsi_seq in struct iscsi_cmd->seq_list */
420 u32 seq_no;
421 /* Lowest offset in current DataOUT sequence */
422 u32 seq_start_offset;
423 /* Highest offset in current DataOUT sequence */
424 u32 seq_end_offset;
425 /* Total size in bytes received so far of READ data */
426 u32 read_data_done;
427 /* Total size in bytes received so far of WRITE data */
428 u32 write_data_done;
429 /* Counter for FirstBurstLength key */
430 u32 first_burst_len;
431 /* Counter for MaxBurstLength key */
432 u32 next_burst_len;
433 /* Transfer size used for IP stack calls */
434 u32 tx_size;
435 /* Buffer used for various purposes */
436 void *buf_ptr;
437 /* Used by SendTargets=[iqn.,eui.] discovery */
438 void *text_in_ptr;
439 /* See include/linux/dma-mapping.h */
440 enum dma_data_direction data_direction;
441 /* iSCSI PDU Header + CRC */
442 unsigned char pdu[ISCSI_HDR_LEN + ISCSI_CRC_LEN];
443 /* Number of times struct iscsi_cmd is present in immediate queue */
444 atomic_t immed_queue_count;
445 atomic_t response_queue_count;
446 spinlock_t datain_lock;
447 spinlock_t dataout_timeout_lock;
448 /* spinlock for protecting struct iscsi_cmd->i_state */
449 spinlock_t istate_lock;
450 /* spinlock for adding within command recovery entries */
451 spinlock_t error_lock;
452 /* spinlock for adding R2Ts */
453 spinlock_t r2t_lock;
454 /* DataIN List */
455 struct list_head datain_list;
456 /* R2T List */
457 struct list_head cmd_r2t_list;
458 /* Timer for DataOUT */
459 struct timer_list dataout_timer;
460 /* Iovecs for SCSI data payload RX/TX w/ kernel level sockets */
461 struct kvec *iov_data;
462 /* Iovecs for miscellaneous purposes */
463 #define ISCSI_MISC_IOVECS 5
464 struct kvec iov_misc[ISCSI_MISC_IOVECS];
465 /* Array of struct iscsi_pdu used for DataPDUInOrder=No */
466 struct iscsi_pdu *pdu_list;
467 /* Current struct iscsi_pdu used for DataPDUInOrder=No */
468 struct iscsi_pdu *pdu_ptr;
469 /* Array of struct iscsi_seq used for DataSequenceInOrder=No */
470 struct iscsi_seq *seq_list;
471 /* Current struct iscsi_seq used for DataSequenceInOrder=No */
472 struct iscsi_seq *seq_ptr;
473 /* TMR Request when iscsi_opcode == ISCSI_OP_SCSI_TMFUNC */
474 struct iscsi_tmr_req *tmr_req;
475 /* Connection this command is alligient to */
476 struct iscsi_conn *conn;
477 /* Pointer to connection recovery entry */
478 struct iscsi_conn_recovery *cr;
479 /* Session the command is part of, used for connection recovery */
480 struct iscsi_session *sess;
481 /* list_head for connection list */
482 struct list_head i_conn_node;
483 /* The TCM I/O descriptor that is accessed via container_of() */
484 struct se_cmd se_cmd;
485 /* Sense buffer that will be mapped into outgoing status */
486 #define ISCSI_SENSE_BUFFER_LEN (TRANSPORT_SENSE_BUFFER + 2)
487 unsigned char sense_buffer[ISCSI_SENSE_BUFFER_LEN];
488
489 u32 padding;
490 u8 pad_bytes[4];
491
492 struct scatterlist *first_data_sg;
493 u32 first_data_sg_off;
494 u32 kmapped_nents;
495 sense_reason_t sense_reason;
496 } ____cacheline_aligned;
497
498 struct iscsi_tmr_req {
499 bool task_reassign:1;
500 u32 exp_data_sn;
501 struct iscsi_cmd *ref_cmd;
502 struct iscsi_conn_recovery *conn_recovery;
503 struct se_tmr_req *se_tmr_req;
504 };
505
506 struct iscsi_conn {
507 wait_queue_head_t queues_wq;
508 /* Authentication Successful for this connection */
509 u8 auth_complete;
510 /* State connection is currently in */
511 u8 conn_state;
512 u8 conn_logout_reason;
513 u8 network_transport;
514 enum iscsi_timer_flags_table nopin_timer_flags;
515 enum iscsi_timer_flags_table nopin_response_timer_flags;
516 /* Used to know what thread encountered a transport failure */
517 u8 which_thread;
518 /* connection id assigned by the Initiator */
519 u16 cid;
520 /* Remote TCP Port */
521 u16 login_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 struct sockaddr_storage login_sockaddr;
532 struct sockaddr_storage local_sockaddr;
533 int conn_usage_count;
534 int conn_waiting_on_uc;
535 atomic_t check_immediate_queue;
536 atomic_t conn_logout_remove;
537 atomic_t connection_exit;
538 atomic_t connection_recovery;
539 atomic_t connection_reinstatement;
540 atomic_t connection_wait_rcfr;
541 atomic_t sleep_on_conn_wait_comp;
542 atomic_t transport_failed;
543 struct completion conn_post_wait_comp;
544 struct completion conn_wait_comp;
545 struct completion conn_wait_rcfr_comp;
546 struct completion conn_waiting_on_uc_comp;
547 struct completion conn_logout_comp;
548 struct completion tx_half_close_comp;
549 struct completion rx_half_close_comp;
550 /* socket used by this connection */
551 struct socket *sock;
552 void (*orig_data_ready)(struct sock *);
553 void (*orig_state_change)(struct sock *);
554 #define LOGIN_FLAGS_READ_ACTIVE 1
555 #define LOGIN_FLAGS_CLOSED 2
556 #define LOGIN_FLAGS_READY 4
557 unsigned long login_flags;
558 struct delayed_work login_work;
559 struct delayed_work login_cleanup_work;
560 struct iscsi_login *login;
561 struct timer_list nopin_timer;
562 struct timer_list nopin_response_timer;
563 struct timer_list transport_timer;
564 struct task_struct *login_kworker;
565 /* Spinlock used for add/deleting cmd's from conn_cmd_list */
566 spinlock_t cmd_lock;
567 spinlock_t conn_usage_lock;
568 spinlock_t immed_queue_lock;
569 spinlock_t nopin_timer_lock;
570 spinlock_t response_queue_lock;
571 spinlock_t state_lock;
572 /* libcrypto RX and TX contexts for crc32c */
573 struct ahash_request *conn_rx_hash;
574 struct ahash_request *conn_tx_hash;
575 /* Used for scheduling TX and RX connection kthreads */
576 cpumask_var_t conn_cpumask;
577 unsigned int conn_rx_reset_cpumask:1;
578 unsigned int conn_tx_reset_cpumask:1;
579 /* list_head of struct iscsi_cmd for this connection */
580 struct list_head conn_cmd_list;
581 struct list_head immed_queue_list;
582 struct list_head response_queue_list;
583 struct iscsi_conn_ops *conn_ops;
584 struct iscsi_login *conn_login;
585 struct iscsit_transport *conn_transport;
586 struct iscsi_param_list *param_list;
587 /* Used for per connection auth state machine */
588 void *auth_protocol;
589 void *context;
590 struct iscsi_login_thread_s *login_thread;
591 struct iscsi_portal_group *tpg;
592 struct iscsi_tpg_np *tpg_np;
593 /* Pointer to parent session */
594 struct iscsi_session *sess;
595 int bitmap_id;
596 int rx_thread_active;
597 struct task_struct *rx_thread;
598 struct completion rx_login_comp;
599 int tx_thread_active;
600 struct task_struct *tx_thread;
601 /* list_head for session connection list */
602 struct list_head conn_list;
603 } ____cacheline_aligned;
604
605 struct iscsi_conn_recovery {
606 u16 cid;
607 u32 cmd_count;
608 u32 maxrecvdatasegmentlength;
609 u32 maxxmitdatasegmentlength;
610 int ready_for_reallegiance;
611 struct list_head conn_recovery_cmd_list;
612 spinlock_t conn_recovery_cmd_lock;
613 struct timer_list time2retain_timer;
614 struct iscsi_session *sess;
615 struct list_head cr_list;
616 } ____cacheline_aligned;
617
618 struct iscsi_session {
619 u8 initiator_vendor;
620 u8 isid[6];
621 enum iscsi_timer_flags_table time2retain_timer_flags;
622 u8 version_active;
623 u16 cid_called;
624 u16 conn_recovery_count;
625 u16 tsih;
626 /* state session is currently in */
627 u32 session_state;
628 /* session wide counter: initiator assigned task tag */
629 itt_t init_task_tag;
630 /* session wide counter: target assigned task tag */
631 u32 targ_xfer_tag;
632 u32 cmdsn_window;
633
634 /* protects cmdsn values */
635 struct mutex cmdsn_mutex;
636 /* session wide counter: expected command sequence number */
637 u32 exp_cmd_sn;
638 /* session wide counter: maximum allowed command sequence number */
639 atomic_t max_cmd_sn;
640 struct list_head sess_ooo_cmdsn_list;
641
642 /* LIO specific session ID */
643 u32 sid;
644 char auth_type[8];
645 /* unique within the target */
646 int session_index;
647 /* Used for session reference counting */
648 int session_usage_count;
649 int session_waiting_on_uc;
650 atomic_long_t cmd_pdus;
651 atomic_long_t rsp_pdus;
652 atomic_long_t tx_data_octets;
653 atomic_long_t rx_data_octets;
654 atomic_long_t conn_digest_errors;
655 atomic_long_t conn_timeout_errors;
656 u64 creation_time;
657 /* Number of active connections */
658 atomic_t nconn;
659 atomic_t session_continuation;
660 atomic_t session_fall_back_to_erl0;
661 atomic_t session_logout;
662 atomic_t session_reinstatement;
663 atomic_t session_stop_active;
664 atomic_t sleep_on_sess_wait_comp;
665 /* connection list */
666 struct list_head sess_conn_list;
667 struct list_head cr_active_list;
668 struct list_head cr_inactive_list;
669 spinlock_t conn_lock;
670 spinlock_t cr_a_lock;
671 spinlock_t cr_i_lock;
672 spinlock_t session_usage_lock;
673 spinlock_t ttt_lock;
674 struct completion async_msg_comp;
675 struct completion reinstatement_comp;
676 struct completion session_wait_comp;
677 struct completion session_waiting_on_uc_comp;
678 struct timer_list time2retain_timer;
679 struct iscsi_sess_ops *sess_ops;
680 struct se_session *se_sess;
681 struct iscsi_portal_group *tpg;
682 } ____cacheline_aligned;
683
684 struct iscsi_login {
685 u8 auth_complete;
686 u8 checked_for_existing;
687 u8 current_stage;
688 u8 leading_connection;
689 u8 first_request;
690 u8 version_min;
691 u8 version_max;
692 u8 login_complete;
693 u8 login_failed;
694 bool zero_tsih;
695 char isid[6];
696 u32 cmd_sn;
697 itt_t init_task_tag;
698 u32 initial_exp_statsn;
699 u32 rsp_length;
700 u16 cid;
701 u16 tsih;
702 char req[ISCSI_HDR_LEN];
703 char rsp[ISCSI_HDR_LEN];
704 char *req_buf;
705 char *rsp_buf;
706 struct iscsi_conn *conn;
707 struct iscsi_np *np;
708 } ____cacheline_aligned;
709
710 struct iscsi_node_attrib {
711 u32 dataout_timeout;
712 u32 dataout_timeout_retries;
713 u32 default_erl;
714 u32 nopin_timeout;
715 u32 nopin_response_timeout;
716 u32 random_datain_pdu_offsets;
717 u32 random_datain_seq_offsets;
718 u32 random_r2t_offsets;
719 u32 tmr_cold_reset;
720 u32 tmr_warm_reset;
721 struct iscsi_node_acl *nacl;
722 };
723
724 struct se_dev_entry_s;
725
726 struct iscsi_node_auth {
727 enum naf_flags_table naf_flags;
728 int authenticate_target;
729 /* Used for iscsit_global->discovery_auth,
730 * set to zero (auth disabled) by default */
731 int enforce_discovery_auth;
732 #define MAX_USER_LEN 256
733 #define MAX_PASS_LEN 256
734 char userid[MAX_USER_LEN];
735 char password[MAX_PASS_LEN];
736 char userid_mutual[MAX_USER_LEN];
737 char password_mutual[MAX_PASS_LEN];
738 };
739
740 #include "iscsi_target_stat.h"
741
742 struct iscsi_node_stat_grps {
743 struct config_group iscsi_sess_stats_group;
744 struct config_group iscsi_conn_stats_group;
745 };
746
747 struct iscsi_node_acl {
748 struct se_node_acl se_node_acl;
749 struct iscsi_node_attrib node_attrib;
750 struct iscsi_node_auth node_auth;
751 struct iscsi_node_stat_grps node_stat_grps;
752 };
753
754 struct iscsi_tpg_attrib {
755 u32 authentication;
756 u32 login_timeout;
757 u32 netif_timeout;
758 u32 generate_node_acls;
759 u32 cache_dynamic_acls;
760 u32 default_cmdsn_depth;
761 u32 demo_mode_write_protect;
762 u32 prod_mode_write_protect;
763 u32 demo_mode_discovery;
764 u32 default_erl;
765 u8 t10_pi;
766 u32 fabric_prot_type;
767 u32 tpg_enabled_sendtargets;
768 struct iscsi_portal_group *tpg;
769 };
770
771 struct 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 bool enabled;
777 enum iscsi_timer_flags_table np_login_timer_flags;
778 u32 np_exports;
779 enum np_flags_table np_flags;
780 spinlock_t np_thread_lock;
781 struct completion np_restart_comp;
782 struct socket *np_socket;
783 struct sockaddr_storage np_sockaddr;
784 struct task_struct *np_thread;
785 struct timer_list np_login_timer;
786 void *np_context;
787 struct iscsit_transport *np_transport;
788 struct list_head np_list;
789 } ____cacheline_aligned;
790
791 struct iscsi_tpg_np {
792 struct iscsi_np *tpg_np;
793 struct iscsi_portal_group *tpg;
794 struct iscsi_tpg_np *tpg_np_parent;
795 struct list_head tpg_np_list;
796 struct list_head tpg_np_child_list;
797 struct list_head tpg_np_parent_list;
798 struct se_tpg_np se_tpg_np;
799 spinlock_t tpg_np_parent_lock;
800 struct completion tpg_np_comp;
801 struct kref tpg_np_kref;
802 };
803
804 struct iscsi_portal_group {
805 unsigned char tpg_chap_id;
806 /* TPG State */
807 enum tpg_state_table tpg_state;
808 /* Target Portal Group Tag */
809 u16 tpgt;
810 /* Id assigned to target sessions */
811 u16 ntsih;
812 /* Number of active sessions */
813 u32 nsessions;
814 /* Number of Network Portals available for this TPG */
815 u32 num_tpg_nps;
816 /* Per TPG LIO specific session ID. */
817 u32 sid;
818 /* Spinlock for adding/removing Network Portals */
819 spinlock_t tpg_np_lock;
820 spinlock_t tpg_state_lock;
821 struct se_portal_group tpg_se_tpg;
822 struct mutex tpg_access_lock;
823 struct semaphore np_login_sem;
824 struct iscsi_tpg_attrib tpg_attrib;
825 struct iscsi_node_auth tpg_demo_auth;
826 /* Pointer to default list of iSCSI parameters for TPG */
827 struct iscsi_param_list *param_list;
828 struct iscsi_tiqn *tpg_tiqn;
829 struct list_head tpg_gnp_list;
830 struct list_head tpg_list;
831 } ____cacheline_aligned;
832
833 struct iscsi_wwn_stat_grps {
834 struct config_group iscsi_stat_group;
835 struct config_group iscsi_instance_group;
836 struct config_group iscsi_sess_err_group;
837 struct config_group iscsi_tgt_attr_group;
838 struct config_group iscsi_login_stats_group;
839 struct config_group iscsi_logout_stats_group;
840 };
841
842 struct iscsi_tiqn {
843 #define ISCSI_IQN_LEN 224
844 unsigned char tiqn[ISCSI_IQN_LEN];
845 enum tiqn_state_table tiqn_state;
846 int tiqn_access_count;
847 u32 tiqn_active_tpgs;
848 u32 tiqn_ntpgs;
849 u32 tiqn_num_tpg_nps;
850 u32 tiqn_nsessions;
851 struct list_head tiqn_list;
852 struct list_head tiqn_tpg_list;
853 spinlock_t tiqn_state_lock;
854 spinlock_t tiqn_tpg_lock;
855 struct se_wwn tiqn_wwn;
856 struct iscsi_wwn_stat_grps tiqn_stat_grps;
857 int tiqn_index;
858 struct iscsi_sess_err_stats sess_err_stats;
859 struct iscsi_login_stats login_stats;
860 struct iscsi_logout_stats logout_stats;
861 } ____cacheline_aligned;
862
863 struct iscsit_global {
864 /* In core shutdown */
865 u32 in_shutdown;
866 u32 active_ts;
867 /* Unique identifier used for the authentication daemon */
868 u32 auth_id;
869 u32 inactive_ts;
870 #define ISCSIT_BITMAP_BITS 262144
871 /* Thread Set bitmap pointer */
872 unsigned long *ts_bitmap;
873 spinlock_t ts_bitmap_lock;
874 /* Used for iSCSI discovery session authentication */
875 struct iscsi_node_acl discovery_acl;
876 struct iscsi_portal_group *discovery_tpg;
877 };
878
879 static inline u32 session_get_next_ttt(struct iscsi_session *session)
880 {
881 u32 ttt;
882
883 spin_lock_bh(&session->ttt_lock);
884 ttt = session->targ_xfer_tag++;
885 if (ttt == 0xFFFFFFFF)
886 ttt = session->targ_xfer_tag++;
887 spin_unlock_bh(&session->ttt_lock);
888
889 return ttt;
890 }
891
892 extern struct iscsi_cmd *iscsit_find_cmd_from_itt(struct iscsi_conn *, itt_t);
893 #endif /* ISCSI_TARGET_CORE_H */
Linux with added FPC-III support