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perf tools: Don't clone maps from parent when synthesizing forks
[linux/fpc-iii.git] / include / target / iscsi / iscsi_target_core.h
blob24c398f4a68f09945cae66b9d5a25ac2ad56a7e9
1 /* SPDX-License-Identifier: GPL-2.0 */
2 #ifndef ISCSI_TARGET_CORE_H
3 #define ISCSI_TARGET_CORE_H
4
5 #include <linux/dma-direction.h> /* enum dma_data_direction */
6 #include <linux/list.h> /* struct list_head */
7 #include <linux/sched.h>
8 #include <linux/socket.h> /* struct sockaddr_storage */
9 #include <linux/types.h> /* u8 */
10 #include <scsi/iscsi_proto.h> /* itt_t */
11 #include <target/target_core_base.h> /* struct se_cmd */
12
13 struct sock;
14
15 #define ISCSIT_VERSION "v4.1.0"
16 #define ISCSI_MAX_DATASN_MISSING_COUNT 16
17 #define ISCSI_TX_THREAD_TCP_TIMEOUT 2
18 #define ISCSI_RX_THREAD_TCP_TIMEOUT 2
19 #define SECONDS_FOR_ASYNC_LOGOUT 10
20 #define SECONDS_FOR_ASYNC_TEXT 10
21 #define SECONDS_FOR_LOGOUT_COMP 15
22 #define WHITE_SPACE " \t\v\f\n\r"
23 #define ISCSIT_MIN_TAGS 16
24 #define ISCSIT_EXTRA_TAGS 8
25 #define ISCSIT_TCP_BACKLOG 256
26 #define ISCSI_RX_THREAD_NAME "iscsi_trx"
27 #define ISCSI_TX_THREAD_NAME "iscsi_ttx"
28 #define ISCSI_IQN_LEN 224
29
30 /* struct iscsi_node_attrib sanity values */
31 #define NA_DATAOUT_TIMEOUT 3
32 #define NA_DATAOUT_TIMEOUT_MAX 60
33 #define NA_DATAOUT_TIMEOUT_MIX 2
34 #define NA_DATAOUT_TIMEOUT_RETRIES 5
35 #define NA_DATAOUT_TIMEOUT_RETRIES_MAX 15
36 #define NA_DATAOUT_TIMEOUT_RETRIES_MIN 1
37 #define NA_NOPIN_TIMEOUT 15
38 #define NA_NOPIN_TIMEOUT_MAX 60
39 #define NA_NOPIN_TIMEOUT_MIN 3
40 #define NA_NOPIN_RESPONSE_TIMEOUT 30
41 #define NA_NOPIN_RESPONSE_TIMEOUT_MAX 60
42 #define NA_NOPIN_RESPONSE_TIMEOUT_MIN 3
43 #define NA_RANDOM_DATAIN_PDU_OFFSETS 0
44 #define NA_RANDOM_DATAIN_SEQ_OFFSETS 0
45 #define NA_RANDOM_R2T_OFFSETS 0
46
47 /* struct iscsi_tpg_attrib sanity values */
48 #define TA_AUTHENTICATION 1
49 #define TA_LOGIN_TIMEOUT 15
50 #define TA_LOGIN_TIMEOUT_MAX 30
51 #define TA_LOGIN_TIMEOUT_MIN 5
52 #define TA_NETIF_TIMEOUT 2
53 #define TA_NETIF_TIMEOUT_MAX 15
54 #define TA_NETIF_TIMEOUT_MIN 2
55 #define TA_GENERATE_NODE_ACLS 0
56 #define TA_DEFAULT_CMDSN_DEPTH 64
57 #define TA_DEFAULT_CMDSN_DEPTH_MAX 512
58 #define TA_DEFAULT_CMDSN_DEPTH_MIN 1
59 #define TA_CACHE_DYNAMIC_ACLS 0
60 /* Enabled by default in demo mode (generic_node_acls=1) */
61 #define TA_DEMO_MODE_WRITE_PROTECT 1
62 /* Disabled by default in production mode w/ explict ACLs */
63 #define TA_PROD_MODE_WRITE_PROTECT 0
64 #define TA_DEMO_MODE_DISCOVERY 1
65 #define TA_DEFAULT_ERL 0
66 #define TA_CACHE_CORE_NPS 0
67 /* T10 protection information disabled by default */
68 #define TA_DEFAULT_T10_PI 0
69 #define TA_DEFAULT_FABRIC_PROT_TYPE 0
70 /* TPG status needs to be enabled to return sendtargets discovery endpoint info */
71 #define TA_DEFAULT_TPG_ENABLED_SENDTARGETS 1
72 /*
73 * Used to control the sending of keys with optional to respond state bit,
74 * as a workaround for non RFC compliant initiators,that do not propose,
75 * nor respond to specific keys required for login to complete.
76 *
77 * See iscsi_check_proposer_for_optional_reply() for more details.
78 */
79 #define TA_DEFAULT_LOGIN_KEYS_WORKAROUND 1
80
81 #define ISCSI_IOV_DATA_BUFFER 5
82
83 enum iscsit_transport_type {
84 ISCSI_TCP = 0,
85 ISCSI_SCTP_TCP = 1,
86 ISCSI_SCTP_UDP = 2,
87 ISCSI_IWARP_TCP = 3,
88 ISCSI_IWARP_SCTP = 4,
89 ISCSI_INFINIBAND = 5,
90 ISCSI_CXGBIT = 6,
91 };
92
93 /* RFC-3720 7.1.4 Standard Connection State Diagram for a Target */
94 enum target_conn_state_table {
95 TARG_CONN_STATE_FREE = 0x1,
96 TARG_CONN_STATE_XPT_UP = 0x3,
97 TARG_CONN_STATE_IN_LOGIN = 0x4,
98 TARG_CONN_STATE_LOGGED_IN = 0x5,
99 TARG_CONN_STATE_IN_LOGOUT = 0x6,
100 TARG_CONN_STATE_LOGOUT_REQUESTED = 0x7,
101 TARG_CONN_STATE_CLEANUP_WAIT = 0x8,
102 };
103
104 /* RFC-3720 7.3.2 Session State Diagram for a Target */
105 enum target_sess_state_table {
106 TARG_SESS_STATE_FREE = 0x1,
107 TARG_SESS_STATE_ACTIVE = 0x2,
108 TARG_SESS_STATE_LOGGED_IN = 0x3,
109 TARG_SESS_STATE_FAILED = 0x4,
110 TARG_SESS_STATE_IN_CONTINUE = 0x5,
111 };
112
113 /* struct iscsi_data_count->type */
114 enum data_count_type {
115 ISCSI_RX_DATA = 1,
116 ISCSI_TX_DATA = 2,
117 };
118
119 /* struct iscsi_datain_req->dr_complete */
120 enum datain_req_comp_table {
121 DATAIN_COMPLETE_NORMAL = 1,
122 DATAIN_COMPLETE_WITHIN_COMMAND_RECOVERY = 2,
123 DATAIN_COMPLETE_CONNECTION_RECOVERY = 3,
124 };
125
126 /* struct iscsi_datain_req->recovery */
127 enum datain_req_rec_table {
128 DATAIN_WITHIN_COMMAND_RECOVERY = 1,
129 DATAIN_CONNECTION_RECOVERY = 2,
130 };
131
132 /* struct iscsi_portal_group->state */
133 enum tpg_state_table {
134 TPG_STATE_FREE = 0,
135 TPG_STATE_ACTIVE = 1,
136 TPG_STATE_INACTIVE = 2,
137 TPG_STATE_COLD_RESET = 3,
138 };
139
140 /* struct iscsi_tiqn->tiqn_state */
141 enum tiqn_state_table {
142 TIQN_STATE_ACTIVE = 1,
143 TIQN_STATE_SHUTDOWN = 2,
144 };
145
146 /* struct iscsi_cmd->cmd_flags */
147 enum cmd_flags_table {
148 ICF_GOT_LAST_DATAOUT = 0x00000001,
149 ICF_GOT_DATACK_SNACK = 0x00000002,
150 ICF_NON_IMMEDIATE_UNSOLICITED_DATA = 0x00000004,
151 ICF_SENT_LAST_R2T = 0x00000008,
152 ICF_WITHIN_COMMAND_RECOVERY = 0x00000010,
153 ICF_CONTIG_MEMORY = 0x00000020,
154 ICF_ATTACHED_TO_RQUEUE = 0x00000040,
155 ICF_OOO_CMDSN = 0x00000080,
156 ICF_SENDTARGETS_ALL = 0x00000100,
157 ICF_SENDTARGETS_SINGLE = 0x00000200,
158 };
159
160 /* struct iscsi_cmd->i_state */
161 enum cmd_i_state_table {
162 ISTATE_NO_STATE = 0,
163 ISTATE_NEW_CMD = 1,
164 ISTATE_DEFERRED_CMD = 2,
165 ISTATE_UNSOLICITED_DATA = 3,
166 ISTATE_RECEIVE_DATAOUT = 4,
167 ISTATE_RECEIVE_DATAOUT_RECOVERY = 5,
168 ISTATE_RECEIVED_LAST_DATAOUT = 6,
169 ISTATE_WITHIN_DATAOUT_RECOVERY = 7,
170 ISTATE_IN_CONNECTION_RECOVERY = 8,
171 ISTATE_RECEIVED_TASKMGT = 9,
172 ISTATE_SEND_ASYNCMSG = 10,
173 ISTATE_SENT_ASYNCMSG = 11,
174 ISTATE_SEND_DATAIN = 12,
175 ISTATE_SEND_LAST_DATAIN = 13,
176 ISTATE_SENT_LAST_DATAIN = 14,
177 ISTATE_SEND_LOGOUTRSP = 15,
178 ISTATE_SENT_LOGOUTRSP = 16,
179 ISTATE_SEND_NOPIN = 17,
180 ISTATE_SENT_NOPIN = 18,
181 ISTATE_SEND_REJECT = 19,
182 ISTATE_SENT_REJECT = 20,
183 ISTATE_SEND_R2T = 21,
184 ISTATE_SENT_R2T = 22,
185 ISTATE_SEND_R2T_RECOVERY = 23,
186 ISTATE_SENT_R2T_RECOVERY = 24,
187 ISTATE_SEND_LAST_R2T = 25,
188 ISTATE_SENT_LAST_R2T = 26,
189 ISTATE_SEND_LAST_R2T_RECOVERY = 27,
190 ISTATE_SENT_LAST_R2T_RECOVERY = 28,
191 ISTATE_SEND_STATUS = 29,
192 ISTATE_SEND_STATUS_BROKEN_PC = 30,
193 ISTATE_SENT_STATUS = 31,
194 ISTATE_SEND_STATUS_RECOVERY = 32,
195 ISTATE_SENT_STATUS_RECOVERY = 33,
196 ISTATE_SEND_TASKMGTRSP = 34,
197 ISTATE_SENT_TASKMGTRSP = 35,
198 ISTATE_SEND_TEXTRSP = 36,
199 ISTATE_SENT_TEXTRSP = 37,
200 ISTATE_SEND_NOPIN_WANT_RESPONSE = 38,
201 ISTATE_SENT_NOPIN_WANT_RESPONSE = 39,
202 ISTATE_SEND_NOPIN_NO_RESPONSE = 40,
203 ISTATE_REMOVE = 41,
204 ISTATE_FREE = 42,
205 };
206
207 /* Used for iscsi_recover_cmdsn() return values */
208 enum recover_cmdsn_ret_table {
209 CMDSN_ERROR_CANNOT_RECOVER = -1,
210 CMDSN_NORMAL_OPERATION = 0,
211 CMDSN_LOWER_THAN_EXP = 1,
212 CMDSN_HIGHER_THAN_EXP = 2,
213 CMDSN_MAXCMDSN_OVERRUN = 3,
214 };
215
216 /* Used for iscsi_handle_immediate_data() return values */
217 enum immedate_data_ret_table {
218 IMMEDIATE_DATA_CANNOT_RECOVER = -1,
219 IMMEDIATE_DATA_NORMAL_OPERATION = 0,
220 IMMEDIATE_DATA_ERL1_CRC_FAILURE = 1,
221 };
222
223 /* Used for iscsi_decide_dataout_action() return values */
224 enum dataout_action_ret_table {
225 DATAOUT_CANNOT_RECOVER = -1,
226 DATAOUT_NORMAL = 0,
227 DATAOUT_SEND_R2T = 1,
228 DATAOUT_SEND_TO_TRANSPORT = 2,
229 DATAOUT_WITHIN_COMMAND_RECOVERY = 3,
230 };
231
232 /* Used for struct iscsi_node_auth->naf_flags */
233 enum naf_flags_table {
234 NAF_USERID_SET = 0x01,
235 NAF_PASSWORD_SET = 0x02,
236 NAF_USERID_IN_SET = 0x04,
237 NAF_PASSWORD_IN_SET = 0x08,
238 };
239
240 /* Used by various struct timer_list to manage iSCSI specific state */
241 enum iscsi_timer_flags_table {
242 ISCSI_TF_RUNNING = 0x01,
243 ISCSI_TF_STOP = 0x02,
244 ISCSI_TF_EXPIRED = 0x04,
245 };
246
247 /* Used for struct iscsi_np->np_flags */
248 enum np_flags_table {
249 NPF_IP_NETWORK = 0x00,
250 };
251
252 /* Used for struct iscsi_np->np_thread_state */
253 enum np_thread_state_table {
254 ISCSI_NP_THREAD_ACTIVE = 1,
255 ISCSI_NP_THREAD_INACTIVE = 2,
256 ISCSI_NP_THREAD_RESET = 3,
257 ISCSI_NP_THREAD_SHUTDOWN = 4,
258 ISCSI_NP_THREAD_EXIT = 5,
259 };
260
261 struct iscsi_conn_ops {
262 u8 HeaderDigest; /* [0,1] == [None,CRC32C] */
263 u8 DataDigest; /* [0,1] == [None,CRC32C] */
264 u32 MaxRecvDataSegmentLength; /* [512..2**24-1] */
265 u32 MaxXmitDataSegmentLength; /* [512..2**24-1] */
266 /*
267 * iSER specific connection parameters
268 */
269 u32 InitiatorRecvDataSegmentLength; /* [512..2**24-1] */
270 u32 TargetRecvDataSegmentLength; /* [512..2**24-1] */
271 };
272
273 struct iscsi_sess_ops {
274 char InitiatorName[ISCSI_IQN_LEN];
275 char InitiatorAlias[256];
276 char TargetName[ISCSI_IQN_LEN];
277 char TargetAlias[256];
278 char TargetAddress[256];
279 u16 TargetPortalGroupTag; /* [0..65535] */
280 u16 MaxConnections; /* [1..65535] */
281 u8 InitialR2T; /* [0,1] == [No,Yes] */
282 u8 ImmediateData; /* [0,1] == [No,Yes] */
283 u32 MaxBurstLength; /* [512..2**24-1] */
284 u32 FirstBurstLength; /* [512..2**24-1] */
285 u16 DefaultTime2Wait; /* [0..3600] */
286 u16 DefaultTime2Retain; /* [0..3600] */
287 u16 MaxOutstandingR2T; /* [1..65535] */
288 u8 DataPDUInOrder; /* [0,1] == [No,Yes] */
289 u8 DataSequenceInOrder; /* [0,1] == [No,Yes] */
290 u8 ErrorRecoveryLevel; /* [0..2] */
291 u8 SessionType; /* [0,1] == [Normal,Discovery]*/
292 /*
293 * iSER specific session parameters
294 */
295 u8 RDMAExtensions; /* [0,1] == [No,Yes] */
296 };
297
298 struct iscsi_queue_req {
299 int state;
300 struct iscsi_cmd *cmd;
301 struct list_head qr_list;
302 };
303
304 struct iscsi_data_count {
305 int data_length;
306 int sync_and_steering;
307 enum data_count_type type;
308 u32 iov_count;
309 u32 ss_iov_count;
310 u32 ss_marker_count;
311 struct kvec *iov;
312 };
313
314 struct iscsi_param_list {
315 bool iser;
316 struct list_head param_list;
317 struct list_head extra_response_list;
318 };
319
320 struct iscsi_datain_req {
321 enum datain_req_comp_table dr_complete;
322 int generate_recovery_values;
323 enum datain_req_rec_table recovery;
324 u32 begrun;
325 u32 runlength;
326 u32 data_length;
327 u32 data_offset;
328 u32 data_sn;
329 u32 next_burst_len;
330 u32 read_data_done;
331 u32 seq_send_order;
332 struct list_head cmd_datain_node;
333 } ____cacheline_aligned;
334
335 struct iscsi_ooo_cmdsn {
336 u16 cid;
337 u32 batch_count;
338 u32 cmdsn;
339 u32 exp_cmdsn;
340 struct iscsi_cmd *cmd;
341 struct list_head ooo_list;
342 } ____cacheline_aligned;
343
344 struct iscsi_datain {
345 u8 flags;
346 u32 data_sn;
347 u32 length;
348 u32 offset;
349 } ____cacheline_aligned;
350
351 struct iscsi_r2t {
352 int seq_complete;
353 int recovery_r2t;
354 int sent_r2t;
355 u32 r2t_sn;
356 u32 offset;
357 u32 targ_xfer_tag;
358 u32 xfer_len;
359 struct list_head r2t_list;
360 } ____cacheline_aligned;
361
362 struct iscsi_cmd {
363 enum iscsi_timer_flags_table dataout_timer_flags;
364 /* DataOUT timeout retries */
365 u8 dataout_timeout_retries;
366 /* Within command recovery count */
367 u8 error_recovery_count;
368 /* iSCSI dependent state for out or order CmdSNs */
369 enum cmd_i_state_table deferred_i_state;
370 /* iSCSI dependent state */
371 enum cmd_i_state_table i_state;
372 /* Command is an immediate command (ISCSI_OP_IMMEDIATE set) */
373 u8 immediate_cmd;
374 /* Immediate data present */
375 u8 immediate_data;
376 /* iSCSI Opcode */
377 u8 iscsi_opcode;
378 /* iSCSI Response Code */
379 u8 iscsi_response;
380 /* Logout reason when iscsi_opcode == ISCSI_INIT_LOGOUT_CMND */
381 u8 logout_reason;
382 /* Logout response code when iscsi_opcode == ISCSI_INIT_LOGOUT_CMND */
383 u8 logout_response;
384 /* MaxCmdSN has been incremented */
385 u8 maxcmdsn_inc;
386 /* Immediate Unsolicited Dataout */
387 u8 unsolicited_data;
388 /* Reject reason code */
389 u8 reject_reason;
390 /* CID contained in logout PDU when opcode == ISCSI_INIT_LOGOUT_CMND */
391 u16 logout_cid;
392 /* Command flags */
393 enum cmd_flags_table cmd_flags;
394 /* Initiator Task Tag assigned from Initiator */
395 itt_t init_task_tag;
396 /* Target Transfer Tag assigned from Target */
397 u32 targ_xfer_tag;
398 /* CmdSN assigned from Initiator */
399 u32 cmd_sn;
400 /* ExpStatSN assigned from Initiator */
401 u32 exp_stat_sn;
402 /* StatSN assigned to this ITT */
403 u32 stat_sn;
404 /* DataSN Counter */
405 u32 data_sn;
406 /* R2TSN Counter */
407 u32 r2t_sn;
408 /* Last DataSN acknowledged via DataAck SNACK */
409 u32 acked_data_sn;
410 /* Used for echoing NOPOUT ping data */
411 u32 buf_ptr_size;
412 /* Used to store DataDigest */
413 u32 data_crc;
414 /* Counter for MaxOutstandingR2T */
415 u32 outstanding_r2ts;
416 /* Next R2T Offset when DataSequenceInOrder=Yes */
417 u32 r2t_offset;
418 /* Iovec current and orig count for iscsi_cmd->iov_data */
419 u32 iov_data_count;
420 u32 orig_iov_data_count;
421 /* Number of miscellaneous iovecs used for IP stack calls */
422 u32 iov_misc_count;
423 /* Number of struct iscsi_pdu in struct iscsi_cmd->pdu_list */
424 u32 pdu_count;
425 /* Next struct iscsi_pdu to send in struct iscsi_cmd->pdu_list */
426 u32 pdu_send_order;
427 /* Current struct iscsi_pdu in struct iscsi_cmd->pdu_list */
428 u32 pdu_start;
429 /* Next struct iscsi_seq to send in struct iscsi_cmd->seq_list */
430 u32 seq_send_order;
431 /* Number of struct iscsi_seq in struct iscsi_cmd->seq_list */
432 u32 seq_count;
433 /* Current struct iscsi_seq in struct iscsi_cmd->seq_list */
434 u32 seq_no;
435 /* Lowest offset in current DataOUT sequence */
436 u32 seq_start_offset;
437 /* Highest offset in current DataOUT sequence */
438 u32 seq_end_offset;
439 /* Total size in bytes received so far of READ data */
440 u32 read_data_done;
441 /* Total size in bytes received so far of WRITE data */
442 u32 write_data_done;
443 /* Counter for FirstBurstLength key */
444 u32 first_burst_len;
445 /* Counter for MaxBurstLength key */
446 u32 next_burst_len;
447 /* Transfer size used for IP stack calls */
448 u32 tx_size;
449 /* Buffer used for various purposes */
450 void *buf_ptr;
451 /* Used by SendTargets=[iqn.,eui.] discovery */
452 void *text_in_ptr;
453 /* See include/linux/dma-mapping.h */
454 enum dma_data_direction data_direction;
455 /* iSCSI PDU Header + CRC */
456 unsigned char pdu[ISCSI_HDR_LEN + ISCSI_CRC_LEN];
457 /* Number of times struct iscsi_cmd is present in immediate queue */
458 atomic_t immed_queue_count;
459 atomic_t response_queue_count;
460 spinlock_t datain_lock;
461 spinlock_t dataout_timeout_lock;
462 /* spinlock for protecting struct iscsi_cmd->i_state */
463 spinlock_t istate_lock;
464 /* spinlock for adding within command recovery entries */
465 spinlock_t error_lock;
466 /* spinlock for adding R2Ts */
467 spinlock_t r2t_lock;
468 /* DataIN List */
469 struct list_head datain_list;
470 /* R2T List */
471 struct list_head cmd_r2t_list;
472 /* Timer for DataOUT */
473 struct timer_list dataout_timer;
474 /* Iovecs for SCSI data payload RX/TX w/ kernel level sockets */
475 struct kvec *iov_data;
476 /* Iovecs for miscellaneous purposes */
477 #define ISCSI_MISC_IOVECS 5
478 struct kvec iov_misc[ISCSI_MISC_IOVECS];
479 /* Array of struct iscsi_pdu used for DataPDUInOrder=No */
480 struct iscsi_pdu *pdu_list;
481 /* Current struct iscsi_pdu used for DataPDUInOrder=No */
482 struct iscsi_pdu *pdu_ptr;
483 /* Array of struct iscsi_seq used for DataSequenceInOrder=No */
484 struct iscsi_seq *seq_list;
485 /* Current struct iscsi_seq used for DataSequenceInOrder=No */
486 struct iscsi_seq *seq_ptr;
487 /* TMR Request when iscsi_opcode == ISCSI_OP_SCSI_TMFUNC */
488 struct iscsi_tmr_req *tmr_req;
489 /* Connection this command is alligient to */
490 struct iscsi_conn *conn;
491 /* Pointer to connection recovery entry */
492 struct iscsi_conn_recovery *cr;
493 /* Session the command is part of, used for connection recovery */
494 struct iscsi_session *sess;
495 /* list_head for connection list */
496 struct list_head i_conn_node;
497 /* The TCM I/O descriptor that is accessed via container_of() */
498 struct se_cmd se_cmd;
499 /* Sense buffer that will be mapped into outgoing status */
500 #define ISCSI_SENSE_BUFFER_LEN (TRANSPORT_SENSE_BUFFER + 2)
501 unsigned char sense_buffer[ISCSI_SENSE_BUFFER_LEN];
502
503 u32 padding;
504 u8 pad_bytes[4];
505
506 struct scatterlist *first_data_sg;
507 u32 first_data_sg_off;
508 u32 kmapped_nents;
509 sense_reason_t sense_reason;
510 } ____cacheline_aligned;
511
512 struct iscsi_tmr_req {
513 bool task_reassign:1;
514 u32 exp_data_sn;
515 struct iscsi_cmd *ref_cmd;
516 struct iscsi_conn_recovery *conn_recovery;
517 struct se_tmr_req *se_tmr_req;
518 };
519
520 struct iscsi_conn {
521 wait_queue_head_t queues_wq;
522 /* Authentication Successful for this connection */
523 u8 auth_complete;
524 /* State connection is currently in */
525 u8 conn_state;
526 u8 conn_logout_reason;
527 u8 network_transport;
528 enum iscsi_timer_flags_table nopin_timer_flags;
529 enum iscsi_timer_flags_table nopin_response_timer_flags;
530 /* Used to know what thread encountered a transport failure */
531 u8 which_thread;
532 /* connection id assigned by the Initiator */
533 u16 cid;
534 /* Remote TCP Port */
535 u16 login_port;
536 int net_size;
537 int login_family;
538 u32 auth_id;
539 u32 conn_flags;
540 /* Used for iscsi_tx_login_rsp() */
541 itt_t login_itt;
542 u32 exp_statsn;
543 /* Per connection status sequence number */
544 u32 stat_sn;
545 struct sockaddr_storage login_sockaddr;
546 struct sockaddr_storage local_sockaddr;
547 int conn_usage_count;
548 int conn_waiting_on_uc;
549 atomic_t check_immediate_queue;
550 atomic_t conn_logout_remove;
551 atomic_t connection_exit;
552 atomic_t connection_recovery;
553 atomic_t connection_reinstatement;
554 atomic_t connection_wait_rcfr;
555 atomic_t sleep_on_conn_wait_comp;
556 atomic_t transport_failed;
557 struct completion conn_post_wait_comp;
558 struct completion conn_wait_comp;
559 struct completion conn_wait_rcfr_comp;
560 struct completion conn_waiting_on_uc_comp;
561 struct completion conn_logout_comp;
562 struct completion tx_half_close_comp;
563 struct completion rx_half_close_comp;
564 /* socket used by this connection */
565 struct socket *sock;
566 void (*orig_data_ready)(struct sock *);
567 void (*orig_state_change)(struct sock *);
568 #define LOGIN_FLAGS_READ_ACTIVE 1
569 #define LOGIN_FLAGS_CLOSED 2
570 #define LOGIN_FLAGS_READY 4
571 #define LOGIN_FLAGS_INITIAL_PDU 8
572 unsigned long login_flags;
573 struct delayed_work login_work;
574 struct iscsi_login *login;
575 struct timer_list nopin_timer;
576 struct timer_list nopin_response_timer;
577 struct timer_list transport_timer;
578 struct task_struct *login_kworker;
579 /* Spinlock used for add/deleting cmd's from conn_cmd_list */
580 spinlock_t cmd_lock;
581 spinlock_t conn_usage_lock;
582 spinlock_t immed_queue_lock;
583 spinlock_t nopin_timer_lock;
584 spinlock_t response_queue_lock;
585 spinlock_t state_lock;
586 /* libcrypto RX and TX contexts for crc32c */
587 struct ahash_request *conn_rx_hash;
588 struct ahash_request *conn_tx_hash;
589 /* Used for scheduling TX and RX connection kthreads */
590 cpumask_var_t conn_cpumask;
591 unsigned int conn_rx_reset_cpumask:1;
592 unsigned int conn_tx_reset_cpumask:1;
593 /* list_head of struct iscsi_cmd for this connection */
594 struct list_head conn_cmd_list;
595 struct list_head immed_queue_list;
596 struct list_head response_queue_list;
597 struct iscsi_conn_ops *conn_ops;
598 struct iscsi_login *conn_login;
599 struct iscsit_transport *conn_transport;
600 struct iscsi_param_list *param_list;
601 /* Used for per connection auth state machine */
602 void *auth_protocol;
603 void *context;
604 struct iscsi_login_thread_s *login_thread;
605 struct iscsi_portal_group *tpg;
606 struct iscsi_tpg_np *tpg_np;
607 /* Pointer to parent session */
608 struct iscsi_session *sess;
609 int bitmap_id;
610 int rx_thread_active;
611 struct task_struct *rx_thread;
612 struct completion rx_login_comp;
613 int tx_thread_active;
614 struct task_struct *tx_thread;
615 /* list_head for session connection list */
616 struct list_head conn_list;
617 } ____cacheline_aligned;
618
619 struct iscsi_conn_recovery {
620 u16 cid;
621 u32 cmd_count;
622 u32 maxrecvdatasegmentlength;
623 u32 maxxmitdatasegmentlength;
624 int ready_for_reallegiance;
625 struct list_head conn_recovery_cmd_list;
626 spinlock_t conn_recovery_cmd_lock;
627 struct timer_list time2retain_timer;
628 struct iscsi_session *sess;
629 struct list_head cr_list;
630 } ____cacheline_aligned;
631
632 struct iscsi_session {
633 u8 initiator_vendor;
634 u8 isid[6];
635 enum iscsi_timer_flags_table time2retain_timer_flags;
636 u8 version_active;
637 u16 cid_called;
638 u16 conn_recovery_count;
639 u16 tsih;
640 /* state session is currently in */
641 u32 session_state;
642 /* session wide counter: initiator assigned task tag */
643 itt_t init_task_tag;
644 /* session wide counter: target assigned task tag */
645 u32 targ_xfer_tag;
646 u32 cmdsn_window;
647
648 /* protects cmdsn values */
649 struct mutex cmdsn_mutex;
650 /* session wide counter: expected command sequence number */
651 u32 exp_cmd_sn;
652 /* session wide counter: maximum allowed command sequence number */
653 atomic_t max_cmd_sn;
654 struct list_head sess_ooo_cmdsn_list;
655
656 /* LIO specific session ID */
657 u32 sid;
658 char auth_type[8];
659 /* unique within the target */
660 int session_index;
661 /* Used for session reference counting */
662 int session_usage_count;
663 int session_waiting_on_uc;
664 atomic_long_t cmd_pdus;
665 atomic_long_t rsp_pdus;
666 atomic_long_t tx_data_octets;
667 atomic_long_t rx_data_octets;
668 atomic_long_t conn_digest_errors;
669 atomic_long_t conn_timeout_errors;
670 u64 creation_time;
671 /* Number of active connections */
672 atomic_t nconn;
673 atomic_t session_continuation;
674 atomic_t session_fall_back_to_erl0;
675 atomic_t session_logout;
676 atomic_t session_reinstatement;
677 atomic_t session_stop_active;
678 atomic_t sleep_on_sess_wait_comp;
679 /* connection list */
680 struct list_head sess_conn_list;
681 struct list_head cr_active_list;
682 struct list_head cr_inactive_list;
683 spinlock_t conn_lock;
684 spinlock_t cr_a_lock;
685 spinlock_t cr_i_lock;
686 spinlock_t session_usage_lock;
687 spinlock_t ttt_lock;
688 struct completion async_msg_comp;
689 struct completion reinstatement_comp;
690 struct completion session_wait_comp;
691 struct completion session_waiting_on_uc_comp;
692 struct timer_list time2retain_timer;
693 struct iscsi_sess_ops *sess_ops;
694 struct se_session *se_sess;
695 struct iscsi_portal_group *tpg;
696 } ____cacheline_aligned;
697
698 struct iscsi_login {
699 u8 auth_complete;
700 u8 checked_for_existing;
701 u8 current_stage;
702 u8 leading_connection;
703 u8 first_request;
704 u8 version_min;
705 u8 version_max;
706 u8 login_complete;
707 u8 login_failed;
708 bool zero_tsih;
709 char isid[6];
710 u32 cmd_sn;
711 itt_t init_task_tag;
712 u32 initial_exp_statsn;
713 u32 rsp_length;
714 u16 cid;
715 u16 tsih;
716 char req[ISCSI_HDR_LEN];
717 char rsp[ISCSI_HDR_LEN];
718 char *req_buf;
719 char *rsp_buf;
720 struct iscsi_conn *conn;
721 struct iscsi_np *np;
722 } ____cacheline_aligned;
723
724 struct iscsi_node_attrib {
725 u32 dataout_timeout;
726 u32 dataout_timeout_retries;
727 u32 default_erl;
728 u32 nopin_timeout;
729 u32 nopin_response_timeout;
730 u32 random_datain_pdu_offsets;
731 u32 random_datain_seq_offsets;
732 u32 random_r2t_offsets;
733 u32 tmr_cold_reset;
734 u32 tmr_warm_reset;
735 struct iscsi_node_acl *nacl;
736 };
737
738 struct se_dev_entry_s;
739
740 struct iscsi_node_auth {
741 enum naf_flags_table naf_flags;
742 int authenticate_target;
743 /* Used for iscsit_global->discovery_auth,
744 * set to zero (auth disabled) by default */
745 int enforce_discovery_auth;
746 #define MAX_USER_LEN 256
747 #define MAX_PASS_LEN 256
748 char userid[MAX_USER_LEN];
749 char password[MAX_PASS_LEN];
750 char userid_mutual[MAX_USER_LEN];
751 char password_mutual[MAX_PASS_LEN];
752 };
753
754 #include "iscsi_target_stat.h"
755
756 struct iscsi_node_stat_grps {
757 struct config_group iscsi_sess_stats_group;
758 struct config_group iscsi_conn_stats_group;
759 };
760
761 struct iscsi_node_acl {
762 struct se_node_acl se_node_acl;
763 struct iscsi_node_attrib node_attrib;
764 struct iscsi_node_auth node_auth;
765 struct iscsi_node_stat_grps node_stat_grps;
766 };
767
768 struct iscsi_tpg_attrib {
769 u32 authentication;
770 u32 login_timeout;
771 u32 netif_timeout;
772 u32 generate_node_acls;
773 u32 cache_dynamic_acls;
774 u32 default_cmdsn_depth;
775 u32 demo_mode_write_protect;
776 u32 prod_mode_write_protect;
777 u32 demo_mode_discovery;
778 u32 default_erl;
779 u8 t10_pi;
780 u32 fabric_prot_type;
781 u32 tpg_enabled_sendtargets;
782 u32 login_keys_workaround;
783 struct iscsi_portal_group *tpg;
784 };
785
786 struct iscsi_np {
787 int np_network_transport;
788 int np_ip_proto;
789 int np_sock_type;
790 enum np_thread_state_table np_thread_state;
791 bool enabled;
792 atomic_t np_reset_count;
793 enum iscsi_timer_flags_table np_login_timer_flags;
794 u32 np_exports;
795 enum np_flags_table np_flags;
796 spinlock_t np_thread_lock;
797 struct completion np_restart_comp;
798 struct socket *np_socket;
799 struct sockaddr_storage np_sockaddr;
800 struct task_struct *np_thread;
801 struct timer_list np_login_timer;
802 void *np_context;
803 struct iscsit_transport *np_transport;
804 struct list_head np_list;
805 } ____cacheline_aligned;
806
807 struct iscsi_tpg_np {
808 struct iscsi_np *tpg_np;
809 struct iscsi_portal_group *tpg;
810 struct iscsi_tpg_np *tpg_np_parent;
811 struct list_head tpg_np_list;
812 struct list_head tpg_np_child_list;
813 struct list_head tpg_np_parent_list;
814 struct se_tpg_np se_tpg_np;
815 spinlock_t tpg_np_parent_lock;
816 struct completion tpg_np_comp;
817 struct kref tpg_np_kref;
818 };
819
820 struct iscsi_portal_group {
821 unsigned char tpg_chap_id;
822 /* TPG State */
823 enum tpg_state_table tpg_state;
824 /* Target Portal Group Tag */
825 u16 tpgt;
826 /* Id assigned to target sessions */
827 u16 ntsih;
828 /* Number of active sessions */
829 u32 nsessions;
830 /* Number of Network Portals available for this TPG */
831 u32 num_tpg_nps;
832 /* Per TPG LIO specific session ID. */
833 u32 sid;
834 /* Spinlock for adding/removing Network Portals */
835 spinlock_t tpg_np_lock;
836 spinlock_t tpg_state_lock;
837 struct se_portal_group tpg_se_tpg;
838 struct mutex tpg_access_lock;
839 struct semaphore np_login_sem;
840 struct iscsi_tpg_attrib tpg_attrib;
841 struct iscsi_node_auth tpg_demo_auth;
842 /* Pointer to default list of iSCSI parameters for TPG */
843 struct iscsi_param_list *param_list;
844 struct iscsi_tiqn *tpg_tiqn;
845 struct list_head tpg_gnp_list;
846 struct list_head tpg_list;
847 } ____cacheline_aligned;
848
849 struct iscsi_wwn_stat_grps {
850 struct config_group iscsi_stat_group;
851 struct config_group iscsi_instance_group;
852 struct config_group iscsi_sess_err_group;
853 struct config_group iscsi_tgt_attr_group;
854 struct config_group iscsi_login_stats_group;
855 struct config_group iscsi_logout_stats_group;
856 };
857
858 struct iscsi_tiqn {
859 unsigned char tiqn[ISCSI_IQN_LEN];
860 enum tiqn_state_table tiqn_state;
861 int tiqn_access_count;
862 u32 tiqn_active_tpgs;
863 u32 tiqn_ntpgs;
864 u32 tiqn_num_tpg_nps;
865 u32 tiqn_nsessions;
866 struct list_head tiqn_list;
867 struct list_head tiqn_tpg_list;
868 spinlock_t tiqn_state_lock;
869 spinlock_t tiqn_tpg_lock;
870 struct se_wwn tiqn_wwn;
871 struct iscsi_wwn_stat_grps tiqn_stat_grps;
872 int tiqn_index;
873 struct iscsi_sess_err_stats sess_err_stats;
874 struct iscsi_login_stats login_stats;
875 struct iscsi_logout_stats logout_stats;
876 } ____cacheline_aligned;
877
878 struct iscsit_global {
879 /* In core shutdown */
880 u32 in_shutdown;
881 u32 active_ts;
882 /* Unique identifier used for the authentication daemon */
883 u32 auth_id;
884 u32 inactive_ts;
885 #define ISCSIT_BITMAP_BITS 262144
886 /* Thread Set bitmap pointer */
887 unsigned long *ts_bitmap;
888 spinlock_t ts_bitmap_lock;
889 /* Used for iSCSI discovery session authentication */
890 struct iscsi_node_acl discovery_acl;
891 struct iscsi_portal_group *discovery_tpg;
892 };
893
894 static inline u32 session_get_next_ttt(struct iscsi_session *session)
895 {
896 u32 ttt;
897
898 spin_lock_bh(&session->ttt_lock);
899 ttt = session->targ_xfer_tag++;
900 if (ttt == 0xFFFFFFFF)
901 ttt = session->targ_xfer_tag++;
902 spin_unlock_bh(&session->ttt_lock);
903
904 return ttt;
905 }
906
907 extern struct iscsi_cmd *iscsit_find_cmd_from_itt(struct iscsi_conn *, itt_t);
908
909 static inline void iscsit_thread_check_cpumask(
910 struct iscsi_conn *conn,
911 struct task_struct *p,
912 int mode)
913 {
914 /*
915 * mode == 1 signals iscsi_target_tx_thread() usage.
916 * mode == 0 signals iscsi_target_rx_thread() usage.
917 */
918 if (mode == 1) {
919 if (!conn->conn_tx_reset_cpumask)
920 return;
921 conn->conn_tx_reset_cpumask = 0;
922 } else {
923 if (!conn->conn_rx_reset_cpumask)
924 return;
925 conn->conn_rx_reset_cpumask = 0;
926 }
927 /*
928 * Update the CPU mask for this single kthread so that
929 * both TX and RX kthreads are scheduled to run on the
930 * same CPU.
931 */
932 set_cpus_allowed_ptr(p, conn->conn_cpumask);
933 }
934 #endif /* ISCSI_TARGET_CORE_H */
Linux with added FPC-III support