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target/cxgbit: Use T6 specific macros to get ETH/IP hdr len
[linux/fpc-iii.git] / include / target / iscsi / iscsi_target_core.h
blob275581d483ddd90d97c550ee8bf44d705833ecf8
1 #ifndef ISCSI_TARGET_CORE_H
2 #define ISCSI_TARGET_CORE_H
3
4 #include <linux/dma-direction.h> /* enum dma_data_direction */
5 #include <linux/list.h> /* struct list_head */
6 #include <linux/socket.h> /* struct sockaddr_storage */
7 #include <linux/types.h> /* u8 */
8 #include <scsi/iscsi_proto.h> /* itt_t */
9 #include <target/target_core_base.h> /* struct se_cmd */
10
11 struct sock;
12
13 #define ISCSIT_VERSION "v4.1.0"
14 #define ISCSI_MAX_DATASN_MISSING_COUNT 16
15 #define ISCSI_TX_THREAD_TCP_TIMEOUT 2
16 #define ISCSI_RX_THREAD_TCP_TIMEOUT 2
17 #define SECONDS_FOR_ASYNC_LOGOUT 10
18 #define SECONDS_FOR_ASYNC_TEXT 10
19 #define SECONDS_FOR_LOGOUT_COMP 15
20 #define WHITE_SPACE " \t\v\f\n\r"
21 #define ISCSIT_MIN_TAGS 16
22 #define ISCSIT_EXTRA_TAGS 8
23 #define ISCSIT_TCP_BACKLOG 256
24 #define ISCSI_RX_THREAD_NAME "iscsi_trx"
25 #define ISCSI_TX_THREAD_NAME "iscsi_ttx"
26
27 /* struct iscsi_node_attrib sanity values */
28 #define NA_DATAOUT_TIMEOUT 3
29 #define NA_DATAOUT_TIMEOUT_MAX 60
30 #define NA_DATAOUT_TIMEOUT_MIX 2
31 #define NA_DATAOUT_TIMEOUT_RETRIES 5
32 #define NA_DATAOUT_TIMEOUT_RETRIES_MAX 15
33 #define NA_DATAOUT_TIMEOUT_RETRIES_MIN 1
34 #define NA_NOPIN_TIMEOUT 15
35 #define NA_NOPIN_TIMEOUT_MAX 60
36 #define NA_NOPIN_TIMEOUT_MIN 3
37 #define NA_NOPIN_RESPONSE_TIMEOUT 30
38 #define NA_NOPIN_RESPONSE_TIMEOUT_MAX 60
39 #define NA_NOPIN_RESPONSE_TIMEOUT_MIN 3
40 #define NA_RANDOM_DATAIN_PDU_OFFSETS 0
41 #define NA_RANDOM_DATAIN_SEQ_OFFSETS 0
42 #define NA_RANDOM_R2T_OFFSETS 0
43
44 /* struct iscsi_tpg_attrib sanity values */
45 #define TA_AUTHENTICATION 1
46 #define TA_LOGIN_TIMEOUT 15
47 #define TA_LOGIN_TIMEOUT_MAX 30
48 #define TA_LOGIN_TIMEOUT_MIN 5
49 #define TA_NETIF_TIMEOUT 2
50 #define TA_NETIF_TIMEOUT_MAX 15
51 #define TA_NETIF_TIMEOUT_MIN 2
52 #define TA_GENERATE_NODE_ACLS 0
53 #define TA_DEFAULT_CMDSN_DEPTH 64
54 #define TA_DEFAULT_CMDSN_DEPTH_MAX 512
55 #define TA_DEFAULT_CMDSN_DEPTH_MIN 1
56 #define TA_CACHE_DYNAMIC_ACLS 0
57 /* Enabled by default in demo mode (generic_node_acls=1) */
58 #define TA_DEMO_MODE_WRITE_PROTECT 1
59 /* Disabled by default in production mode w/ explict ACLs */
60 #define TA_PROD_MODE_WRITE_PROTECT 0
61 #define TA_DEMO_MODE_DISCOVERY 1
62 #define TA_DEFAULT_ERL 0
63 #define TA_CACHE_CORE_NPS 0
64 /* T10 protection information disabled by default */
65 #define TA_DEFAULT_T10_PI 0
66 #define TA_DEFAULT_FABRIC_PROT_TYPE 0
67 /* TPG status needs to be enabled to return sendtargets discovery endpoint info */
68 #define TA_DEFAULT_TPG_ENABLED_SENDTARGETS 1
69
70 #define ISCSI_IOV_DATA_BUFFER 5
71
72 enum iscsit_transport_type {
73 ISCSI_TCP = 0,
74 ISCSI_SCTP_TCP = 1,
75 ISCSI_SCTP_UDP = 2,
76 ISCSI_IWARP_TCP = 3,
77 ISCSI_IWARP_SCTP = 4,
78 ISCSI_INFINIBAND = 5,
79 ISCSI_CXGBIT = 6,
80 };
81
82 /* RFC-3720 7.1.4 Standard Connection State Diagram for a Target */
83 enum target_conn_state_table {
84 TARG_CONN_STATE_FREE = 0x1,
85 TARG_CONN_STATE_XPT_UP = 0x3,
86 TARG_CONN_STATE_IN_LOGIN = 0x4,
87 TARG_CONN_STATE_LOGGED_IN = 0x5,
88 TARG_CONN_STATE_IN_LOGOUT = 0x6,
89 TARG_CONN_STATE_LOGOUT_REQUESTED = 0x7,
90 TARG_CONN_STATE_CLEANUP_WAIT = 0x8,
91 };
92
93 /* RFC-3720 7.3.2 Session State Diagram for a Target */
94 enum target_sess_state_table {
95 TARG_SESS_STATE_FREE = 0x1,
96 TARG_SESS_STATE_ACTIVE = 0x2,
97 TARG_SESS_STATE_LOGGED_IN = 0x3,
98 TARG_SESS_STATE_FAILED = 0x4,
99 TARG_SESS_STATE_IN_CONTINUE = 0x5,
100 };
101
102 /* struct iscsi_data_count->type */
103 enum data_count_type {
104 ISCSI_RX_DATA = 1,
105 ISCSI_TX_DATA = 2,
106 };
107
108 /* struct iscsi_datain_req->dr_complete */
109 enum datain_req_comp_table {
110 DATAIN_COMPLETE_NORMAL = 1,
111 DATAIN_COMPLETE_WITHIN_COMMAND_RECOVERY = 2,
112 DATAIN_COMPLETE_CONNECTION_RECOVERY = 3,
113 };
114
115 /* struct iscsi_datain_req->recovery */
116 enum datain_req_rec_table {
117 DATAIN_WITHIN_COMMAND_RECOVERY = 1,
118 DATAIN_CONNECTION_RECOVERY = 2,
119 };
120
121 /* struct iscsi_portal_group->state */
122 enum tpg_state_table {
123 TPG_STATE_FREE = 0,
124 TPG_STATE_ACTIVE = 1,
125 TPG_STATE_INACTIVE = 2,
126 TPG_STATE_COLD_RESET = 3,
127 };
128
129 /* struct iscsi_tiqn->tiqn_state */
130 enum tiqn_state_table {
131 TIQN_STATE_ACTIVE = 1,
132 TIQN_STATE_SHUTDOWN = 2,
133 };
134
135 /* struct iscsi_cmd->cmd_flags */
136 enum cmd_flags_table {
137 ICF_GOT_LAST_DATAOUT = 0x00000001,
138 ICF_GOT_DATACK_SNACK = 0x00000002,
139 ICF_NON_IMMEDIATE_UNSOLICITED_DATA = 0x00000004,
140 ICF_SENT_LAST_R2T = 0x00000008,
141 ICF_WITHIN_COMMAND_RECOVERY = 0x00000010,
142 ICF_CONTIG_MEMORY = 0x00000020,
143 ICF_ATTACHED_TO_RQUEUE = 0x00000040,
144 ICF_OOO_CMDSN = 0x00000080,
145 ICF_SENDTARGETS_ALL = 0x00000100,
146 ICF_SENDTARGETS_SINGLE = 0x00000200,
147 };
148
149 /* struct iscsi_cmd->i_state */
150 enum cmd_i_state_table {
151 ISTATE_NO_STATE = 0,
152 ISTATE_NEW_CMD = 1,
153 ISTATE_DEFERRED_CMD = 2,
154 ISTATE_UNSOLICITED_DATA = 3,
155 ISTATE_RECEIVE_DATAOUT = 4,
156 ISTATE_RECEIVE_DATAOUT_RECOVERY = 5,
157 ISTATE_RECEIVED_LAST_DATAOUT = 6,
158 ISTATE_WITHIN_DATAOUT_RECOVERY = 7,
159 ISTATE_IN_CONNECTION_RECOVERY = 8,
160 ISTATE_RECEIVED_TASKMGT = 9,
161 ISTATE_SEND_ASYNCMSG = 10,
162 ISTATE_SENT_ASYNCMSG = 11,
163 ISTATE_SEND_DATAIN = 12,
164 ISTATE_SEND_LAST_DATAIN = 13,
165 ISTATE_SENT_LAST_DATAIN = 14,
166 ISTATE_SEND_LOGOUTRSP = 15,
167 ISTATE_SENT_LOGOUTRSP = 16,
168 ISTATE_SEND_NOPIN = 17,
169 ISTATE_SENT_NOPIN = 18,
170 ISTATE_SEND_REJECT = 19,
171 ISTATE_SENT_REJECT = 20,
172 ISTATE_SEND_R2T = 21,
173 ISTATE_SENT_R2T = 22,
174 ISTATE_SEND_R2T_RECOVERY = 23,
175 ISTATE_SENT_R2T_RECOVERY = 24,
176 ISTATE_SEND_LAST_R2T = 25,
177 ISTATE_SENT_LAST_R2T = 26,
178 ISTATE_SEND_LAST_R2T_RECOVERY = 27,
179 ISTATE_SENT_LAST_R2T_RECOVERY = 28,
180 ISTATE_SEND_STATUS = 29,
181 ISTATE_SEND_STATUS_BROKEN_PC = 30,
182 ISTATE_SENT_STATUS = 31,
183 ISTATE_SEND_STATUS_RECOVERY = 32,
184 ISTATE_SENT_STATUS_RECOVERY = 33,
185 ISTATE_SEND_TASKMGTRSP = 34,
186 ISTATE_SENT_TASKMGTRSP = 35,
187 ISTATE_SEND_TEXTRSP = 36,
188 ISTATE_SENT_TEXTRSP = 37,
189 ISTATE_SEND_NOPIN_WANT_RESPONSE = 38,
190 ISTATE_SENT_NOPIN_WANT_RESPONSE = 39,
191 ISTATE_SEND_NOPIN_NO_RESPONSE = 40,
192 ISTATE_REMOVE = 41,
193 ISTATE_FREE = 42,
194 };
195
196 /* Used for iscsi_recover_cmdsn() return values */
197 enum recover_cmdsn_ret_table {
198 CMDSN_ERROR_CANNOT_RECOVER = -1,
199 CMDSN_NORMAL_OPERATION = 0,
200 CMDSN_LOWER_THAN_EXP = 1,
201 CMDSN_HIGHER_THAN_EXP = 2,
202 CMDSN_MAXCMDSN_OVERRUN = 3,
203 };
204
205 /* Used for iscsi_handle_immediate_data() return values */
206 enum immedate_data_ret_table {
207 IMMEDIATE_DATA_CANNOT_RECOVER = -1,
208 IMMEDIATE_DATA_NORMAL_OPERATION = 0,
209 IMMEDIATE_DATA_ERL1_CRC_FAILURE = 1,
210 };
211
212 /* Used for iscsi_decide_dataout_action() return values */
213 enum dataout_action_ret_table {
214 DATAOUT_CANNOT_RECOVER = -1,
215 DATAOUT_NORMAL = 0,
216 DATAOUT_SEND_R2T = 1,
217 DATAOUT_SEND_TO_TRANSPORT = 2,
218 DATAOUT_WITHIN_COMMAND_RECOVERY = 3,
219 };
220
221 /* Used for struct iscsi_node_auth->naf_flags */
222 enum naf_flags_table {
223 NAF_USERID_SET = 0x01,
224 NAF_PASSWORD_SET = 0x02,
225 NAF_USERID_IN_SET = 0x04,
226 NAF_PASSWORD_IN_SET = 0x08,
227 };
228
229 /* Used by various struct timer_list to manage iSCSI specific state */
230 enum iscsi_timer_flags_table {
231 ISCSI_TF_RUNNING = 0x01,
232 ISCSI_TF_STOP = 0x02,
233 ISCSI_TF_EXPIRED = 0x04,
234 };
235
236 /* Used for struct iscsi_np->np_flags */
237 enum np_flags_table {
238 NPF_IP_NETWORK = 0x00,
239 };
240
241 /* Used for struct iscsi_np->np_thread_state */
242 enum np_thread_state_table {
243 ISCSI_NP_THREAD_ACTIVE = 1,
244 ISCSI_NP_THREAD_INACTIVE = 2,
245 ISCSI_NP_THREAD_RESET = 3,
246 ISCSI_NP_THREAD_SHUTDOWN = 4,
247 ISCSI_NP_THREAD_EXIT = 5,
248 };
249
250 struct iscsi_conn_ops {
251 u8 HeaderDigest; /* [0,1] == [None,CRC32C] */
252 u8 DataDigest; /* [0,1] == [None,CRC32C] */
253 u32 MaxRecvDataSegmentLength; /* [512..2**24-1] */
254 u32 MaxXmitDataSegmentLength; /* [512..2**24-1] */
255 /*
256 * iSER specific connection parameters
257 */
258 u32 InitiatorRecvDataSegmentLength; /* [512..2**24-1] */
259 u32 TargetRecvDataSegmentLength; /* [512..2**24-1] */
260 };
261
262 struct iscsi_sess_ops {
263 char InitiatorName[224];
264 char InitiatorAlias[256];
265 char TargetName[224];
266 char TargetAlias[256];
267 char TargetAddress[256];
268 u16 TargetPortalGroupTag; /* [0..65535] */
269 u16 MaxConnections; /* [1..65535] */
270 u8 InitialR2T; /* [0,1] == [No,Yes] */
271 u8 ImmediateData; /* [0,1] == [No,Yes] */
272 u32 MaxBurstLength; /* [512..2**24-1] */
273 u32 FirstBurstLength; /* [512..2**24-1] */
274 u16 DefaultTime2Wait; /* [0..3600] */
275 u16 DefaultTime2Retain; /* [0..3600] */
276 u16 MaxOutstandingR2T; /* [1..65535] */
277 u8 DataPDUInOrder; /* [0,1] == [No,Yes] */
278 u8 DataSequenceInOrder; /* [0,1] == [No,Yes] */
279 u8 ErrorRecoveryLevel; /* [0..2] */
280 u8 SessionType; /* [0,1] == [Normal,Discovery]*/
281 /*
282 * iSER specific session parameters
283 */
284 u8 RDMAExtensions; /* [0,1] == [No,Yes] */
285 };
286
287 struct iscsi_queue_req {
288 int state;
289 struct iscsi_cmd *cmd;
290 struct list_head qr_list;
291 };
292
293 struct iscsi_data_count {
294 int data_length;
295 int sync_and_steering;
296 enum data_count_type type;
297 u32 iov_count;
298 u32 ss_iov_count;
299 u32 ss_marker_count;
300 struct kvec *iov;
301 };
302
303 struct iscsi_param_list {
304 bool iser;
305 struct list_head param_list;
306 struct list_head extra_response_list;
307 };
308
309 struct iscsi_datain_req {
310 enum datain_req_comp_table dr_complete;
311 int generate_recovery_values;
312 enum datain_req_rec_table recovery;
313 u32 begrun;
314 u32 runlength;
315 u32 data_length;
316 u32 data_offset;
317 u32 data_sn;
318 u32 next_burst_len;
319 u32 read_data_done;
320 u32 seq_send_order;
321 struct list_head cmd_datain_node;
322 } ____cacheline_aligned;
323
324 struct iscsi_ooo_cmdsn {
325 u16 cid;
326 u32 batch_count;
327 u32 cmdsn;
328 u32 exp_cmdsn;
329 struct iscsi_cmd *cmd;
330 struct list_head ooo_list;
331 } ____cacheline_aligned;
332
333 struct iscsi_datain {
334 u8 flags;
335 u32 data_sn;
336 u32 length;
337 u32 offset;
338 } ____cacheline_aligned;
339
340 struct iscsi_r2t {
341 int seq_complete;
342 int recovery_r2t;
343 int sent_r2t;
344 u32 r2t_sn;
345 u32 offset;
346 u32 targ_xfer_tag;
347 u32 xfer_len;
348 struct list_head r2t_list;
349 } ____cacheline_aligned;
350
351 struct iscsi_cmd {
352 enum iscsi_timer_flags_table dataout_timer_flags;
353 /* DataOUT timeout retries */
354 u8 dataout_timeout_retries;
355 /* Within command recovery count */
356 u8 error_recovery_count;
357 /* iSCSI dependent state for out or order CmdSNs */
358 enum cmd_i_state_table deferred_i_state;
359 /* iSCSI dependent state */
360 enum cmd_i_state_table i_state;
361 /* Command is an immediate command (ISCSI_OP_IMMEDIATE set) */
362 u8 immediate_cmd;
363 /* Immediate data present */
364 u8 immediate_data;
365 /* iSCSI Opcode */
366 u8 iscsi_opcode;
367 /* iSCSI Response Code */
368 u8 iscsi_response;
369 /* Logout reason when iscsi_opcode == ISCSI_INIT_LOGOUT_CMND */
370 u8 logout_reason;
371 /* Logout response code when iscsi_opcode == ISCSI_INIT_LOGOUT_CMND */
372 u8 logout_response;
373 /* MaxCmdSN has been incremented */
374 u8 maxcmdsn_inc;
375 /* Immediate Unsolicited Dataout */
376 u8 unsolicited_data;
377 /* Reject reason code */
378 u8 reject_reason;
379 /* CID contained in logout PDU when opcode == ISCSI_INIT_LOGOUT_CMND */
380 u16 logout_cid;
381 /* Command flags */
382 enum cmd_flags_table cmd_flags;
383 /* Initiator Task Tag assigned from Initiator */
384 itt_t init_task_tag;
385 /* Target Transfer Tag assigned from Target */
386 u32 targ_xfer_tag;
387 /* CmdSN assigned from Initiator */
388 u32 cmd_sn;
389 /* ExpStatSN assigned from Initiator */
390 u32 exp_stat_sn;
391 /* StatSN assigned to this ITT */
392 u32 stat_sn;
393 /* DataSN Counter */
394 u32 data_sn;
395 /* R2TSN Counter */
396 u32 r2t_sn;
397 /* Last DataSN acknowledged via DataAck SNACK */
398 u32 acked_data_sn;
399 /* Used for echoing NOPOUT ping data */
400 u32 buf_ptr_size;
401 /* Used to store DataDigest */
402 u32 data_crc;
403 /* Counter for MaxOutstandingR2T */
404 u32 outstanding_r2ts;
405 /* Next R2T Offset when DataSequenceInOrder=Yes */
406 u32 r2t_offset;
407 /* Iovec current and orig count for iscsi_cmd->iov_data */
408 u32 iov_data_count;
409 u32 orig_iov_data_count;
410 /* Number of miscellaneous iovecs used for IP stack calls */
411 u32 iov_misc_count;
412 /* Number of struct iscsi_pdu in struct iscsi_cmd->pdu_list */
413 u32 pdu_count;
414 /* Next struct iscsi_pdu to send in struct iscsi_cmd->pdu_list */
415 u32 pdu_send_order;
416 /* Current struct iscsi_pdu in struct iscsi_cmd->pdu_list */
417 u32 pdu_start;
418 /* Next struct iscsi_seq to send in struct iscsi_cmd->seq_list */
419 u32 seq_send_order;
420 /* Number of struct iscsi_seq in struct iscsi_cmd->seq_list */
421 u32 seq_count;
422 /* Current struct iscsi_seq in struct iscsi_cmd->seq_list */
423 u32 seq_no;
424 /* Lowest offset in current DataOUT sequence */
425 u32 seq_start_offset;
426 /* Highest offset in current DataOUT sequence */
427 u32 seq_end_offset;
428 /* Total size in bytes received so far of READ data */
429 u32 read_data_done;
430 /* Total size in bytes received so far of WRITE data */
431 u32 write_data_done;
432 /* Counter for FirstBurstLength key */
433 u32 first_burst_len;
434 /* Counter for MaxBurstLength key */
435 u32 next_burst_len;
436 /* Transfer size used for IP stack calls */
437 u32 tx_size;
438 /* Buffer used for various purposes */
439 void *buf_ptr;
440 /* Used by SendTargets=[iqn.,eui.] discovery */
441 void *text_in_ptr;
442 /* See include/linux/dma-mapping.h */
443 enum dma_data_direction data_direction;
444 /* iSCSI PDU Header + CRC */
445 unsigned char pdu[ISCSI_HDR_LEN + ISCSI_CRC_LEN];
446 /* Number of times struct iscsi_cmd is present in immediate queue */
447 atomic_t immed_queue_count;
448 atomic_t response_queue_count;
449 spinlock_t datain_lock;
450 spinlock_t dataout_timeout_lock;
451 /* spinlock for protecting struct iscsi_cmd->i_state */
452 spinlock_t istate_lock;
453 /* spinlock for adding within command recovery entries */
454 spinlock_t error_lock;
455 /* spinlock for adding R2Ts */
456 spinlock_t r2t_lock;
457 /* DataIN List */
458 struct list_head datain_list;
459 /* R2T List */
460 struct list_head cmd_r2t_list;
461 /* Timer for DataOUT */
462 struct timer_list dataout_timer;
463 /* Iovecs for SCSI data payload RX/TX w/ kernel level sockets */
464 struct kvec *iov_data;
465 /* Iovecs for miscellaneous purposes */
466 #define ISCSI_MISC_IOVECS 5
467 struct kvec iov_misc[ISCSI_MISC_IOVECS];
468 /* Array of struct iscsi_pdu used for DataPDUInOrder=No */
469 struct iscsi_pdu *pdu_list;
470 /* Current struct iscsi_pdu used for DataPDUInOrder=No */
471 struct iscsi_pdu *pdu_ptr;
472 /* Array of struct iscsi_seq used for DataSequenceInOrder=No */
473 struct iscsi_seq *seq_list;
474 /* Current struct iscsi_seq used for DataSequenceInOrder=No */
475 struct iscsi_seq *seq_ptr;
476 /* TMR Request when iscsi_opcode == ISCSI_OP_SCSI_TMFUNC */
477 struct iscsi_tmr_req *tmr_req;
478 /* Connection this command is alligient to */
479 struct iscsi_conn *conn;
480 /* Pointer to connection recovery entry */
481 struct iscsi_conn_recovery *cr;
482 /* Session the command is part of, used for connection recovery */
483 struct iscsi_session *sess;
484 /* list_head for connection list */
485 struct list_head i_conn_node;
486 /* The TCM I/O descriptor that is accessed via container_of() */
487 struct se_cmd se_cmd;
488 /* Sense buffer that will be mapped into outgoing status */
489 #define ISCSI_SENSE_BUFFER_LEN (TRANSPORT_SENSE_BUFFER + 2)
490 unsigned char sense_buffer[ISCSI_SENSE_BUFFER_LEN];
491
492 u32 padding;
493 u8 pad_bytes[4];
494
495 struct scatterlist *first_data_sg;
496 u32 first_data_sg_off;
497 u32 kmapped_nents;
498 sense_reason_t sense_reason;
499 } ____cacheline_aligned;
500
501 struct iscsi_tmr_req {
502 bool task_reassign:1;
503 u32 exp_data_sn;
504 struct iscsi_cmd *ref_cmd;
505 struct iscsi_conn_recovery *conn_recovery;
506 struct se_tmr_req *se_tmr_req;
507 };
508
509 struct iscsi_conn {
510 wait_queue_head_t queues_wq;
511 /* Authentication Successful for this connection */
512 u8 auth_complete;
513 /* State connection is currently in */
514 u8 conn_state;
515 u8 conn_logout_reason;
516 u8 network_transport;
517 enum iscsi_timer_flags_table nopin_timer_flags;
518 enum iscsi_timer_flags_table nopin_response_timer_flags;
519 /* Used to know what thread encountered a transport failure */
520 u8 which_thread;
521 /* connection id assigned by the Initiator */
522 u16 cid;
523 /* Remote TCP Port */
524 u16 login_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 struct sockaddr_storage login_sockaddr;
535 struct sockaddr_storage local_sockaddr;
536 int conn_usage_count;
537 int conn_waiting_on_uc;
538 atomic_t check_immediate_queue;
539 atomic_t conn_logout_remove;
540 atomic_t connection_exit;
541 atomic_t connection_recovery;
542 atomic_t connection_reinstatement;
543 atomic_t connection_wait_rcfr;
544 atomic_t sleep_on_conn_wait_comp;
545 atomic_t transport_failed;
546 struct completion conn_post_wait_comp;
547 struct completion conn_wait_comp;
548 struct completion conn_wait_rcfr_comp;
549 struct completion conn_waiting_on_uc_comp;
550 struct completion conn_logout_comp;
551 struct completion tx_half_close_comp;
552 struct completion rx_half_close_comp;
553 /* socket used by this connection */
554 struct socket *sock;
555 void (*orig_data_ready)(struct sock *);
556 void (*orig_state_change)(struct sock *);
557 #define LOGIN_FLAGS_READ_ACTIVE 1
558 #define LOGIN_FLAGS_CLOSED 2
559 #define LOGIN_FLAGS_READY 4
560 unsigned long login_flags;
561 struct delayed_work login_work;
562 struct delayed_work login_cleanup_work;
563 struct iscsi_login *login;
564 struct timer_list nopin_timer;
565 struct timer_list nopin_response_timer;
566 struct timer_list transport_timer;
567 struct task_struct *login_kworker;
568 /* Spinlock used for add/deleting cmd's from conn_cmd_list */
569 spinlock_t cmd_lock;
570 spinlock_t conn_usage_lock;
571 spinlock_t immed_queue_lock;
572 spinlock_t nopin_timer_lock;
573 spinlock_t response_queue_lock;
574 spinlock_t state_lock;
575 /* libcrypto RX and TX contexts for crc32c */
576 struct ahash_request *conn_rx_hash;
577 struct ahash_request *conn_tx_hash;
578 /* Used for scheduling TX and RX connection kthreads */
579 cpumask_var_t conn_cpumask;
580 unsigned int conn_rx_reset_cpumask:1;
581 unsigned int conn_tx_reset_cpumask:1;
582 /* list_head of struct iscsi_cmd for this connection */
583 struct list_head conn_cmd_list;
584 struct list_head immed_queue_list;
585 struct list_head response_queue_list;
586 struct iscsi_conn_ops *conn_ops;
587 struct iscsi_login *conn_login;
588 struct iscsit_transport *conn_transport;
589 struct iscsi_param_list *param_list;
590 /* Used for per connection auth state machine */
591 void *auth_protocol;
592 void *context;
593 struct iscsi_login_thread_s *login_thread;
594 struct iscsi_portal_group *tpg;
595 struct iscsi_tpg_np *tpg_np;
596 /* Pointer to parent session */
597 struct iscsi_session *sess;
598 int bitmap_id;
599 int rx_thread_active;
600 struct task_struct *rx_thread;
601 struct completion rx_login_comp;
602 int tx_thread_active;
603 struct task_struct *tx_thread;
604 /* list_head for session connection list */
605 struct list_head conn_list;
606 } ____cacheline_aligned;
607
608 struct 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
621 struct 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 atomic_t 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
687 struct 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
713 struct 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
727 struct se_dev_entry_s;
728
729 struct 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
745 struct iscsi_node_stat_grps {
746 struct config_group iscsi_sess_stats_group;
747 struct config_group iscsi_conn_stats_group;
748 };
749
750 struct iscsi_node_acl {
751 struct se_node_acl se_node_acl;
752 struct iscsi_node_attrib node_attrib;
753 struct iscsi_node_auth node_auth;
754 struct iscsi_node_stat_grps node_stat_grps;
755 };
756
757 struct 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 u8 t10_pi;
769 u32 fabric_prot_type;
770 u32 tpg_enabled_sendtargets;
771 struct iscsi_portal_group *tpg;
772 };
773
774 struct iscsi_np {
775 int np_network_transport;
776 int np_ip_proto;
777 int np_sock_type;
778 enum np_thread_state_table np_thread_state;
779 bool enabled;
780 enum iscsi_timer_flags_table np_login_timer_flags;
781 u32 np_exports;
782 enum np_flags_table np_flags;
783 spinlock_t np_thread_lock;
784 struct completion np_restart_comp;
785 struct socket *np_socket;
786 struct sockaddr_storage np_sockaddr;
787 struct task_struct *np_thread;
788 struct timer_list np_login_timer;
789 void *np_context;
790 struct iscsit_transport *np_transport;
791 struct list_head np_list;
792 } ____cacheline_aligned;
793
794 struct iscsi_tpg_np {
795 struct iscsi_np *tpg_np;
796 struct iscsi_portal_group *tpg;
797 struct iscsi_tpg_np *tpg_np_parent;
798 struct list_head tpg_np_list;
799 struct list_head tpg_np_child_list;
800 struct list_head tpg_np_parent_list;
801 struct se_tpg_np se_tpg_np;
802 spinlock_t tpg_np_parent_lock;
803 struct completion tpg_np_comp;
804 struct kref tpg_np_kref;
805 };
806
807 struct iscsi_portal_group {
808 unsigned char tpg_chap_id;
809 /* TPG State */
810 enum tpg_state_table tpg_state;
811 /* Target Portal Group Tag */
812 u16 tpgt;
813 /* Id assigned to target sessions */
814 u16 ntsih;
815 /* Number of active sessions */
816 u32 nsessions;
817 /* Number of Network Portals available for this TPG */
818 u32 num_tpg_nps;
819 /* Per TPG LIO specific session ID. */
820 u32 sid;
821 /* Spinlock for adding/removing Network Portals */
822 spinlock_t tpg_np_lock;
823 spinlock_t tpg_state_lock;
824 struct se_portal_group tpg_se_tpg;
825 struct mutex tpg_access_lock;
826 struct semaphore np_login_sem;
827 struct iscsi_tpg_attrib tpg_attrib;
828 struct iscsi_node_auth tpg_demo_auth;
829 /* Pointer to default list of iSCSI parameters for TPG */
830 struct iscsi_param_list *param_list;
831 struct iscsi_tiqn *tpg_tiqn;
832 struct list_head tpg_gnp_list;
833 struct list_head tpg_list;
834 } ____cacheline_aligned;
835
836 struct iscsi_wwn_stat_grps {
837 struct config_group iscsi_stat_group;
838 struct config_group iscsi_instance_group;
839 struct config_group iscsi_sess_err_group;
840 struct config_group iscsi_tgt_attr_group;
841 struct config_group iscsi_login_stats_group;
842 struct config_group iscsi_logout_stats_group;
843 };
844
845 struct iscsi_tiqn {
846 #define ISCSI_IQN_LEN 224
847 unsigned char tiqn[ISCSI_IQN_LEN];
848 enum tiqn_state_table tiqn_state;
849 int tiqn_access_count;
850 u32 tiqn_active_tpgs;
851 u32 tiqn_ntpgs;
852 u32 tiqn_num_tpg_nps;
853 u32 tiqn_nsessions;
854 struct list_head tiqn_list;
855 struct list_head tiqn_tpg_list;
856 spinlock_t tiqn_state_lock;
857 spinlock_t tiqn_tpg_lock;
858 struct se_wwn tiqn_wwn;
859 struct iscsi_wwn_stat_grps tiqn_stat_grps;
860 int tiqn_index;
861 struct iscsi_sess_err_stats sess_err_stats;
862 struct iscsi_login_stats login_stats;
863 struct iscsi_logout_stats logout_stats;
864 } ____cacheline_aligned;
865
866 struct iscsit_global {
867 /* In core shutdown */
868 u32 in_shutdown;
869 u32 active_ts;
870 /* Unique identifier used for the authentication daemon */
871 u32 auth_id;
872 u32 inactive_ts;
873 #define ISCSIT_BITMAP_BITS 262144
874 /* Thread Set bitmap pointer */
875 unsigned long *ts_bitmap;
876 spinlock_t ts_bitmap_lock;
877 /* Used for iSCSI discovery session authentication */
878 struct iscsi_node_acl discovery_acl;
879 struct iscsi_portal_group *discovery_tpg;
880 };
881
882 static inline u32 session_get_next_ttt(struct iscsi_session *session)
883 {
884 u32 ttt;
885
886 spin_lock_bh(&session->ttt_lock);
887 ttt = session->targ_xfer_tag++;
888 if (ttt == 0xFFFFFFFF)
889 ttt = session->targ_xfer_tag++;
890 spin_unlock_bh(&session->ttt_lock);
891
892 return ttt;
893 }
894
895 extern struct iscsi_cmd *iscsit_find_cmd_from_itt(struct iscsi_conn *, itt_t);
896
897 static inline void iscsit_thread_check_cpumask(
898 struct iscsi_conn *conn,
899 struct task_struct *p,
900 int mode)
901 {
902 /*
903 * mode == 1 signals iscsi_target_tx_thread() usage.
904 * mode == 0 signals iscsi_target_rx_thread() usage.
905 */
906 if (mode == 1) {
907 if (!conn->conn_tx_reset_cpumask)
908 return;
909 conn->conn_tx_reset_cpumask = 0;
910 } else {
911 if (!conn->conn_rx_reset_cpumask)
912 return;
913 conn->conn_rx_reset_cpumask = 0;
914 }
915 /*
916 * Update the CPU mask for this single kthread so that
917 * both TX and RX kthreads are scheduled to run on the
918 * same CPU.
919 */
920 set_cpus_allowed_ptr(p, conn->conn_cpumask);
921 }
922 #endif /* ISCSI_TARGET_CORE_H */
Linux with added FPC-III support