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iscsi_target_core.h
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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-rc2"
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 
21 /* struct iscsi_node_attrib sanity values */
22 #define NA_DATAOUT_TIMEOUT 3
23 #define NA_DATAOUT_TIMEOUT_MAX 60
24 #define NA_DATAOUT_TIMEOUT_MIX 2
25 #define NA_DATAOUT_TIMEOUT_RETRIES 5
26 #define NA_DATAOUT_TIMEOUT_RETRIES_MAX 15
27 #define NA_DATAOUT_TIMEOUT_RETRIES_MIN 1
28 #define NA_NOPIN_TIMEOUT 15
29 #define NA_NOPIN_TIMEOUT_MAX 60
30 #define NA_NOPIN_TIMEOUT_MIN 3
31 #define NA_NOPIN_RESPONSE_TIMEOUT 30
32 #define NA_NOPIN_RESPONSE_TIMEOUT_MAX 60
33 #define NA_NOPIN_RESPONSE_TIMEOUT_MIN 3
34 #define NA_RANDOM_DATAIN_PDU_OFFSETS 0
35 #define NA_RANDOM_DATAIN_SEQ_OFFSETS 0
36 #define NA_RANDOM_R2T_OFFSETS 0
37 #define NA_DEFAULT_ERL 0
38 #define NA_DEFAULT_ERL_MAX 2
39 #define NA_DEFAULT_ERL_MIN 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 16
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_CACHE_CORE_NPS 0
59 
60 
61 #define ISCSI_IOV_DATA_BUFFER 5
62 
63 enum tpg_np_network_transport_table {
64  ISCSI_TCP = 0,
65  ISCSI_SCTP_TCP = 1,
66  ISCSI_SCTP_UDP = 2,
67  ISCSI_IWARP_TCP = 3,
68  ISCSI_IWARP_SCTP = 4,
69  ISCSI_INFINIBAND = 5,
70 };
71 
72 /* RFC-3720 7.1.4 Standard Connection State Diagram for a Target */
73 enum target_conn_state_table {
74  TARG_CONN_STATE_FREE = 0x1,
75  TARG_CONN_STATE_XPT_UP = 0x3,
76  TARG_CONN_STATE_IN_LOGIN = 0x4,
77  TARG_CONN_STATE_LOGGED_IN = 0x5,
78  TARG_CONN_STATE_IN_LOGOUT = 0x6,
79  TARG_CONN_STATE_LOGOUT_REQUESTED = 0x7,
80  TARG_CONN_STATE_CLEANUP_WAIT = 0x8,
81 };
82 
83 /* RFC-3720 7.3.2 Session State Diagram for a Target */
84 enum target_sess_state_table {
85  TARG_SESS_STATE_FREE = 0x1,
86  TARG_SESS_STATE_ACTIVE = 0x2,
87  TARG_SESS_STATE_LOGGED_IN = 0x3,
88  TARG_SESS_STATE_FAILED = 0x4,
89  TARG_SESS_STATE_IN_CONTINUE = 0x5,
90 };
91 
92 /* struct iscsi_data_count->type */
93 enum data_count_type {
94  ISCSI_RX_DATA = 1,
95  ISCSI_TX_DATA = 2,
96 };
97 
98 /* struct iscsi_datain_req->dr_complete */
99 enum datain_req_comp_table {
100  DATAIN_COMPLETE_NORMAL = 1,
101  DATAIN_COMPLETE_WITHIN_COMMAND_RECOVERY = 2,
102  DATAIN_COMPLETE_CONNECTION_RECOVERY = 3,
103 };
104 
105 /* struct iscsi_datain_req->recovery */
106 enum datain_req_rec_table {
107  DATAIN_WITHIN_COMMAND_RECOVERY = 1,
108  DATAIN_CONNECTION_RECOVERY = 2,
109 };
110 
111 /* struct iscsi_portal_group->state */
112 enum tpg_state_table {
113  TPG_STATE_FREE = 0,
114  TPG_STATE_ACTIVE = 1,
115  TPG_STATE_INACTIVE = 2,
116  TPG_STATE_COLD_RESET = 3,
117 };
118 
119 /* struct iscsi_tiqn->tiqn_state */
120 enum tiqn_state_table {
121  TIQN_STATE_ACTIVE = 1,
122  TIQN_STATE_SHUTDOWN = 2,
123 };
124 
125 /* struct iscsi_cmd->cmd_flags */
126 enum cmd_flags_table {
127  ICF_GOT_LAST_DATAOUT = 0x00000001,
128  ICF_GOT_DATACK_SNACK = 0x00000002,
129  ICF_NON_IMMEDIATE_UNSOLICITED_DATA = 0x00000004,
130  ICF_SENT_LAST_R2T = 0x00000008,
131  ICF_WITHIN_COMMAND_RECOVERY = 0x00000010,
132  ICF_CONTIG_MEMORY = 0x00000020,
133  ICF_ATTACHED_TO_RQUEUE = 0x00000040,
134  ICF_OOO_CMDSN = 0x00000080,
135  ICF_REJECT_FAIL_CONN = 0x00000100,
136 };
137 
138 /* struct iscsi_cmd->i_state */
139 enum cmd_i_state_table {
140  ISTATE_NO_STATE = 0,
141  ISTATE_NEW_CMD = 1,
142  ISTATE_DEFERRED_CMD = 2,
143  ISTATE_UNSOLICITED_DATA = 3,
144  ISTATE_RECEIVE_DATAOUT = 4,
145  ISTATE_RECEIVE_DATAOUT_RECOVERY = 5,
146  ISTATE_RECEIVED_LAST_DATAOUT = 6,
147  ISTATE_WITHIN_DATAOUT_RECOVERY = 7,
148  ISTATE_IN_CONNECTION_RECOVERY = 8,
149  ISTATE_RECEIVED_TASKMGT = 9,
150  ISTATE_SEND_ASYNCMSG = 10,
151  ISTATE_SENT_ASYNCMSG = 11,
152  ISTATE_SEND_DATAIN = 12,
153  ISTATE_SEND_LAST_DATAIN = 13,
154  ISTATE_SENT_LAST_DATAIN = 14,
155  ISTATE_SEND_LOGOUTRSP = 15,
156  ISTATE_SENT_LOGOUTRSP = 16,
157  ISTATE_SEND_NOPIN = 17,
158  ISTATE_SENT_NOPIN = 18,
159  ISTATE_SEND_REJECT = 19,
160  ISTATE_SENT_REJECT = 20,
161  ISTATE_SEND_R2T = 21,
162  ISTATE_SENT_R2T = 22,
163  ISTATE_SEND_R2T_RECOVERY = 23,
164  ISTATE_SENT_R2T_RECOVERY = 24,
165  ISTATE_SEND_LAST_R2T = 25,
166  ISTATE_SENT_LAST_R2T = 26,
167  ISTATE_SEND_LAST_R2T_RECOVERY = 27,
168  ISTATE_SENT_LAST_R2T_RECOVERY = 28,
169  ISTATE_SEND_STATUS = 29,
170  ISTATE_SEND_STATUS_BROKEN_PC = 30,
171  ISTATE_SENT_STATUS = 31,
172  ISTATE_SEND_STATUS_RECOVERY = 32,
173  ISTATE_SENT_STATUS_RECOVERY = 33,
174  ISTATE_SEND_TASKMGTRSP = 34,
175  ISTATE_SENT_TASKMGTRSP = 35,
176  ISTATE_SEND_TEXTRSP = 36,
177  ISTATE_SENT_TEXTRSP = 37,
178  ISTATE_SEND_NOPIN_WANT_RESPONSE = 38,
179  ISTATE_SENT_NOPIN_WANT_RESPONSE = 39,
180  ISTATE_SEND_NOPIN_NO_RESPONSE = 40,
181  ISTATE_REMOVE = 41,
182  ISTATE_FREE = 42,
183 };
184 
185 /* Used for iscsi_recover_cmdsn() return values */
186 enum recover_cmdsn_ret_table {
187  CMDSN_ERROR_CANNOT_RECOVER = -1,
188  CMDSN_NORMAL_OPERATION = 0,
189  CMDSN_LOWER_THAN_EXP = 1,
190  CMDSN_HIGHER_THAN_EXP = 2,
191 };
192 
193 /* Used for iscsi_handle_immediate_data() return values */
194 enum immedate_data_ret_table {
195  IMMEDIATE_DATA_CANNOT_RECOVER = -1,
196  IMMEDIATE_DATA_NORMAL_OPERATION = 0,
197  IMMEDIATE_DATA_ERL1_CRC_FAILURE = 1,
198 };
199 
200 /* Used for iscsi_decide_dataout_action() return values */
201 enum dataout_action_ret_table {
202  DATAOUT_CANNOT_RECOVER = -1,
203  DATAOUT_NORMAL = 0,
204  DATAOUT_SEND_R2T = 1,
205  DATAOUT_SEND_TO_TRANSPORT = 2,
206  DATAOUT_WITHIN_COMMAND_RECOVERY = 3,
207 };
208 
209 /* Used for struct iscsi_node_auth->naf_flags */
210 enum naf_flags_table {
211  NAF_USERID_SET = 0x01,
212  NAF_PASSWORD_SET = 0x02,
213  NAF_USERID_IN_SET = 0x04,
214  NAF_PASSWORD_IN_SET = 0x08,
215 };
216 
217 /* Used by various struct timer_list to manage iSCSI specific state */
218 enum iscsi_timer_flags_table {
219  ISCSI_TF_RUNNING = 0x01,
220  ISCSI_TF_STOP = 0x02,
221  ISCSI_TF_EXPIRED = 0x04,
222 };
223 
224 /* Used for struct iscsi_np->np_flags */
225 enum np_flags_table {
226  NPF_IP_NETWORK = 0x00,
227 };
228 
229 /* Used for struct iscsi_np->np_thread_state */
230 enum np_thread_state_table {
231  ISCSI_NP_THREAD_ACTIVE = 1,
232  ISCSI_NP_THREAD_INACTIVE = 2,
233  ISCSI_NP_THREAD_RESET = 3,
234  ISCSI_NP_THREAD_SHUTDOWN = 4,
235  ISCSI_NP_THREAD_EXIT = 5,
236 };
237 
238 struct iscsi_conn_ops {
239  u8 HeaderDigest; /* [0,1] == [None,CRC32C] */
240  u8 DataDigest; /* [0,1] == [None,CRC32C] */
241  u32 MaxRecvDataSegmentLength; /* [512..2**24-1] */
242  u32 MaxXmitDataSegmentLength; /* [512..2**24-1] */
243  u8 OFMarker; /* [0,1] == [No,Yes] */
244  u8 IFMarker; /* [0,1] == [No,Yes] */
245  u32 OFMarkInt; /* [1..65535] */
246  u32 IFMarkInt; /* [1..65535] */
247 };
248 
249 struct iscsi_sess_ops {
250  char InitiatorName[224];
251  char InitiatorAlias[256];
252  char TargetName[224];
253  char TargetAlias[256];
254  char TargetAddress[256];
255  u16 TargetPortalGroupTag; /* [0..65535] */
256  u16 MaxConnections; /* [1..65535] */
257  u8 InitialR2T; /* [0,1] == [No,Yes] */
258  u8 ImmediateData; /* [0,1] == [No,Yes] */
259  u32 MaxBurstLength; /* [512..2**24-1] */
260  u32 FirstBurstLength; /* [512..2**24-1] */
261  u16 DefaultTime2Wait; /* [0..3600] */
262  u16 DefaultTime2Retain; /* [0..3600] */
263  u16 MaxOutstandingR2T; /* [1..65535] */
264  u8 DataPDUInOrder; /* [0,1] == [No,Yes] */
265  u8 DataSequenceInOrder; /* [0,1] == [No,Yes] */
266  u8 ErrorRecoveryLevel; /* [0..2] */
267  u8 SessionType; /* [0,1] == [Normal,Discovery]*/
268 };
269 
270 struct iscsi_queue_req {
271  int state;
272  struct iscsi_cmd *cmd;
273  struct list_head qr_list;
274 };
275 
276 struct iscsi_data_count {
277  int data_length;
278  int sync_and_steering;
279  enum data_count_type type;
280  u32 iov_count;
281  u32 ss_iov_count;
282  u32 ss_marker_count;
283  struct kvec *iov;
284 };
285 
286 struct iscsi_param_list {
287  struct list_head param_list;
288  struct list_head extra_response_list;
289 };
290 
291 struct iscsi_datain_req {
292  enum datain_req_comp_table dr_complete;
293  int generate_recovery_values;
294  enum datain_req_rec_table recovery;
295  u32 begrun;
296  u32 runlength;
297  u32 data_length;
298  u32 data_offset;
299  u32 data_sn;
300  u32 next_burst_len;
301  u32 read_data_done;
302  u32 seq_send_order;
303  struct list_head cmd_datain_node;
304 } ____cacheline_aligned;
305 
306 struct iscsi_ooo_cmdsn {
307  u16 cid;
308  u32 batch_count;
309  u32 cmdsn;
310  u32 exp_cmdsn;
311  struct iscsi_cmd *cmd;
312  struct list_head ooo_list;
313 } ____cacheline_aligned;
314 
315 struct iscsi_datain {
316  u8 flags;
317  u32 data_sn;
318  u32 length;
319  u32 offset;
320 } ____cacheline_aligned;
321 
322 struct iscsi_r2t {
323  int seq_complete;
324  int recovery_r2t;
325  int sent_r2t;
326  u32 r2t_sn;
327  u32 offset;
328  u32 targ_xfer_tag;
329  u32 xfer_len;
330  struct list_head r2t_list;
331 } ____cacheline_aligned;
332 
333 struct iscsi_cmd {
334  enum iscsi_timer_flags_table dataout_timer_flags;
335  /* DataOUT timeout retries */
336  u8 dataout_timeout_retries;
337  /* Within command recovery count */
338  u8 error_recovery_count;
339  /* iSCSI dependent state for out or order CmdSNs */
340  enum cmd_i_state_table deferred_i_state;
341  /* iSCSI dependent state */
342  enum cmd_i_state_table i_state;
343  /* Command is an immediate command (ISCSI_OP_IMMEDIATE set) */
344  u8 immediate_cmd;
345  /* Immediate data present */
346  u8 immediate_data;
347  /* iSCSI Opcode */
348  u8 iscsi_opcode;
349  /* iSCSI Response Code */
350  u8 iscsi_response;
351  /* Logout reason when iscsi_opcode == ISCSI_INIT_LOGOUT_CMND */
352  u8 logout_reason;
353  /* Logout response code when iscsi_opcode == ISCSI_INIT_LOGOUT_CMND */
354  u8 logout_response;
355  /* MaxCmdSN has been incremented */
356  u8 maxcmdsn_inc;
357  /* Immediate Unsolicited Dataout */
358  u8 unsolicited_data;
359  /* CID contained in logout PDU when opcode == ISCSI_INIT_LOGOUT_CMND */
360  u16 logout_cid;
361  /* Command flags */
362  enum cmd_flags_table cmd_flags;
363  /* Initiator Task Tag assigned from Initiator */
364  itt_t init_task_tag;
365  /* Target Transfer Tag assigned from Target */
366  u32 targ_xfer_tag;
367  /* CmdSN assigned from Initiator */
368  u32 cmd_sn;
369  /* ExpStatSN assigned from Initiator */
370  u32 exp_stat_sn;
371  /* StatSN assigned to this ITT */
372  u32 stat_sn;
373  /* DataSN Counter */
374  u32 data_sn;
375  /* R2TSN Counter */
376  u32 r2t_sn;
377  /* Last DataSN acknowledged via DataAck SNACK */
378  u32 acked_data_sn;
379  /* Used for echoing NOPOUT ping data */
380  u32 buf_ptr_size;
381  /* Used to store DataDigest */
382  u32 data_crc;
383  /* Counter for MaxOutstandingR2T */
384  u32 outstanding_r2ts;
385  /* Next R2T Offset when DataSequenceInOrder=Yes */
386  u32 r2t_offset;
387  /* Iovec current and orig count for iscsi_cmd->iov_data */
388  u32 iov_data_count;
389  u32 orig_iov_data_count;
390  /* Number of miscellaneous iovecs used for IP stack calls */
391  u32 iov_misc_count;
392  /* Number of struct iscsi_pdu in struct iscsi_cmd->pdu_list */
393  u32 pdu_count;
394  /* Next struct iscsi_pdu to send in struct iscsi_cmd->pdu_list */
395  u32 pdu_send_order;
396  /* Current struct iscsi_pdu in struct iscsi_cmd->pdu_list */
397  u32 pdu_start;
398  /* Next struct iscsi_seq to send in struct iscsi_cmd->seq_list */
399  u32 seq_send_order;
400  /* Number of struct iscsi_seq in struct iscsi_cmd->seq_list */
401  u32 seq_count;
402  /* Current struct iscsi_seq in struct iscsi_cmd->seq_list */
403  u32 seq_no;
404  /* Lowest offset in current DataOUT sequence */
405  u32 seq_start_offset;
406  /* Highest offset in current DataOUT sequence */
407  u32 seq_end_offset;
408  /* Total size in bytes received so far of READ data */
409  u32 read_data_done;
410  /* Total size in bytes received so far of WRITE data */
411  u32 write_data_done;
412  /* Counter for FirstBurstLength key */
413  u32 first_burst_len;
414  /* Counter for MaxBurstLength key */
415  u32 next_burst_len;
416  /* Transfer size used for IP stack calls */
417  u32 tx_size;
418  /* Buffer used for various purposes */
419  void *buf_ptr;
420  /* See include/linux/dma-mapping.h */
421  enum dma_data_direction data_direction;
422  /* iSCSI PDU Header + CRC */
423  unsigned char pdu[ISCSI_HDR_LEN + ISCSI_CRC_LEN];
424  /* Number of times struct iscsi_cmd is present in immediate queue */
425  atomic_t immed_queue_count;
426  atomic_t response_queue_count;
427  spinlock_t datain_lock;
428  spinlock_t dataout_timeout_lock;
429  /* spinlock for protecting struct iscsi_cmd->i_state */
430  spinlock_t istate_lock;
431  /* spinlock for adding within command recovery entries */
432  spinlock_t error_lock;
433  /* spinlock for adding R2Ts */
434  spinlock_t r2t_lock;
435  /* DataIN List */
436  struct list_head datain_list;
437  /* R2T List */
438  struct list_head cmd_r2t_list;
439  struct completion reject_comp;
440  /* Timer for DataOUT */
441  struct timer_list dataout_timer;
442  /* Iovecs for SCSI data payload RX/TX w/ kernel level sockets */
443  struct kvec *iov_data;
444  /* Iovecs for miscellaneous purposes */
445 #define ISCSI_MISC_IOVECS 5
446  struct kvec iov_misc[ISCSI_MISC_IOVECS];
447  /* Array of struct iscsi_pdu used for DataPDUInOrder=No */
448  struct iscsi_pdu *pdu_list;
449  /* Current struct iscsi_pdu used for DataPDUInOrder=No */
450  struct iscsi_pdu *pdu_ptr;
451  /* Array of struct iscsi_seq used for DataSequenceInOrder=No */
452  struct iscsi_seq *seq_list;
453  /* Current struct iscsi_seq used for DataSequenceInOrder=No */
454  struct iscsi_seq *seq_ptr;
455  /* TMR Request when iscsi_opcode == ISCSI_OP_SCSI_TMFUNC */
456  struct iscsi_tmr_req *tmr_req;
457  /* Connection this command is alligient to */
458  struct iscsi_conn *conn;
459  /* Pointer to connection recovery entry */
460  struct iscsi_conn_recovery *cr;
461  /* Session the command is part of, used for connection recovery */
462  struct iscsi_session *sess;
463  /* list_head for connection list */
464  struct list_head i_conn_node;
465  /* The TCM I/O descriptor that is accessed via container_of() */
466  struct se_cmd se_cmd;
467  /* Sense buffer that will be mapped into outgoing status */
468 #define ISCSI_SENSE_BUFFER_LEN (TRANSPORT_SENSE_BUFFER + 2)
469  unsigned char sense_buffer[ISCSI_SENSE_BUFFER_LEN];
470 
471  u32 padding;
472  u8 pad_bytes[4];
473 
474  struct scatterlist *first_data_sg;
475  u32 first_data_sg_off;
476  u32 kmapped_nents;
477 
478 } ____cacheline_aligned;
479 
480 struct iscsi_tmr_req {
481  bool task_reassign:1;
482  u32 exp_data_sn;
483  struct iscsi_cmd *ref_cmd;
484  struct iscsi_conn_recovery *conn_recovery;
485  struct se_tmr_req *se_tmr_req;
486 };
487 
488 struct iscsi_conn {
489  wait_queue_head_t queues_wq;
490  /* Authentication Successful for this connection */
491  u8 auth_complete;
492  /* State connection is currently in */
493  u8 conn_state;
494  u8 conn_logout_reason;
495  u8 network_transport;
496  enum iscsi_timer_flags_table nopin_timer_flags;
497  enum iscsi_timer_flags_table nopin_response_timer_flags;
498  /* Used to know what thread encountered a transport failure */
499  u8 which_thread;
500  /* connection id assigned by the Initiator */
501  u16 cid;
502  /* Remote TCP Port */
503  u16 login_port;
504  u16 local_port;
505  int net_size;
506  u32 auth_id;
507  u32 conn_flags;
508  /* Used for iscsi_tx_login_rsp() */
509  itt_t login_itt;
510  u32 exp_statsn;
511  /* Per connection status sequence number */
512  u32 stat_sn;
513  /* IFMarkInt's Current Value */
514  u32 if_marker;
515  /* OFMarkInt's Current Value */
516  u32 of_marker;
517  /* Used for calculating OFMarker offset to next PDU */
518  u32 of_marker_offset;
519  /* Complete Bad PDU for sending reject */
520  unsigned char bad_hdr[ISCSI_HDR_LEN];
521 #define IPV6_ADDRESS_SPACE 48
522  unsigned char login_ip[IPV6_ADDRESS_SPACE];
523  unsigned char local_ip[IPV6_ADDRESS_SPACE];
524  int conn_usage_count;
525  int conn_waiting_on_uc;
526  atomic_t check_immediate_queue;
527  atomic_t conn_logout_remove;
528  atomic_t connection_exit;
529  atomic_t connection_recovery;
530  atomic_t connection_reinstatement;
531  atomic_t connection_wait_rcfr;
532  atomic_t sleep_on_conn_wait_comp;
533  atomic_t transport_failed;
534  struct completion conn_post_wait_comp;
535  struct completion conn_wait_comp;
536  struct completion conn_wait_rcfr_comp;
537  struct completion conn_waiting_on_uc_comp;
538  struct completion conn_logout_comp;
539  struct completion tx_half_close_comp;
540  struct completion rx_half_close_comp;
541  /* socket used by this connection */
542  struct socket *sock;
543  struct timer_list nopin_timer;
544  struct timer_list nopin_response_timer;
545  struct timer_list transport_timer;
546  /* Spinlock used for add/deleting cmd's from conn_cmd_list */
547  spinlock_t cmd_lock;
548  spinlock_t conn_usage_lock;
549  spinlock_t immed_queue_lock;
550  spinlock_t nopin_timer_lock;
551  spinlock_t response_queue_lock;
552  spinlock_t state_lock;
553  /* libcrypto RX and TX contexts for crc32c */
554  struct hash_desc conn_rx_hash;
555  struct hash_desc conn_tx_hash;
556  /* Used for scheduling TX and RX connection kthreads */
557  cpumask_var_t conn_cpumask;
558  unsigned int conn_rx_reset_cpumask:1;
559  unsigned int conn_tx_reset_cpumask:1;
560  /* list_head of struct iscsi_cmd for this connection */
561  struct list_head conn_cmd_list;
562  struct list_head immed_queue_list;
563  struct list_head response_queue_list;
564  struct iscsi_conn_ops *conn_ops;
565  struct iscsi_param_list *param_list;
566  /* Used for per connection auth state machine */
567  void *auth_protocol;
568  struct iscsi_login_thread_s *login_thread;
569  struct iscsi_portal_group *tpg;
570  /* Pointer to parent session */
571  struct iscsi_session *sess;
572  /* Pointer to thread_set in use for this conn's threads */
573  struct iscsi_thread_set *thread_set;
574  /* list_head for session connection list */
575  struct list_head conn_list;
576 } ____cacheline_aligned;
577 
578 struct iscsi_conn_recovery {
579  u16 cid;
580  u32 cmd_count;
581  u32 maxrecvdatasegmentlength;
582  u32 maxxmitdatasegmentlength;
583  int ready_for_reallegiance;
584  struct list_head conn_recovery_cmd_list;
585  spinlock_t conn_recovery_cmd_lock;
586  struct timer_list time2retain_timer;
587  struct iscsi_session *sess;
588  struct list_head cr_list;
589 } ____cacheline_aligned;
590 
591 struct iscsi_session {
592  u8 initiator_vendor;
593  u8 isid[6];
594  enum iscsi_timer_flags_table time2retain_timer_flags;
595  u8 version_active;
596  u16 cid_called;
597  u16 conn_recovery_count;
598  u16 tsih;
599  /* state session is currently in */
600  u32 session_state;
601  /* session wide counter: initiator assigned task tag */
602  itt_t init_task_tag;
603  /* session wide counter: target assigned task tag */
604  u32 targ_xfer_tag;
605  u32 cmdsn_window;
606 
607  /* protects cmdsn values */
608  struct mutex cmdsn_mutex;
609  /* session wide counter: expected command sequence number */
610  u32 exp_cmd_sn;
611  /* session wide counter: maximum allowed command sequence number */
612  u32 max_cmd_sn;
613  struct list_head sess_ooo_cmdsn_list;
614 
615  /* LIO specific session ID */
616  u32 sid;
617  char auth_type[8];
618  /* unique within the target */
619  int session_index;
620  /* Used for session reference counting */
621  int session_usage_count;
622  int session_waiting_on_uc;
623  u32 cmd_pdus;
624  u32 rsp_pdus;
625  u64 tx_data_octets;
626  u64 rx_data_octets;
627  u32 conn_digest_errors;
628  u32 conn_timeout_errors;
629  u64 creation_time;
630  spinlock_t session_stats_lock;
631  /* Number of active connections */
632  atomic_t nconn;
633  atomic_t session_continuation;
634  atomic_t session_fall_back_to_erl0;
635  atomic_t session_logout;
636  atomic_t session_reinstatement;
637  atomic_t session_stop_active;
638  atomic_t sleep_on_sess_wait_comp;
639  /* connection list */
640  struct list_head sess_conn_list;
641  struct list_head cr_active_list;
642  struct list_head cr_inactive_list;
643  spinlock_t conn_lock;
644  spinlock_t cr_a_lock;
645  spinlock_t cr_i_lock;
646  spinlock_t session_usage_lock;
647  spinlock_t ttt_lock;
648  struct completion async_msg_comp;
649  struct completion reinstatement_comp;
650  struct completion session_wait_comp;
651  struct completion session_waiting_on_uc_comp;
652  struct timer_list time2retain_timer;
653  struct iscsi_sess_ops *sess_ops;
654  struct se_session *se_sess;
655  struct iscsi_portal_group *tpg;
656 } ____cacheline_aligned;
657 
658 struct iscsi_login {
659  u8 auth_complete;
660  u8 checked_for_existing;
661  u8 current_stage;
662  u8 leading_connection;
663  u8 first_request;
664  u8 version_min;
665  u8 version_max;
666  char isid[6];
667  u32 cmd_sn;
668  itt_t init_task_tag;
669  u32 initial_exp_statsn;
670  u32 rsp_length;
671  u16 cid;
672  u16 tsih;
673  char *req;
674  char *rsp;
675  char *req_buf;
676  char *rsp_buf;
677 } ____cacheline_aligned;
678 
679 struct iscsi_node_attrib {
680  u32 dataout_timeout;
681  u32 dataout_timeout_retries;
682  u32 default_erl;
683  u32 nopin_timeout;
684  u32 nopin_response_timeout;
685  u32 random_datain_pdu_offsets;
686  u32 random_datain_seq_offsets;
687  u32 random_r2t_offsets;
688  u32 tmr_cold_reset;
689  u32 tmr_warm_reset;
690  struct iscsi_node_acl *nacl;
691 };
692 
693 struct se_dev_entry_s;
694 
695 struct iscsi_node_auth {
696  enum naf_flags_table naf_flags;
697  int authenticate_target;
698  /* Used for iscsit_global->discovery_auth,
699  * set to zero (auth disabled) by default */
700  int enforce_discovery_auth;
701 #define MAX_USER_LEN 256
702 #define MAX_PASS_LEN 256
703  char userid[MAX_USER_LEN];
704  char password[MAX_PASS_LEN];
705  char userid_mutual[MAX_USER_LEN];
706  char password_mutual[MAX_PASS_LEN];
707 };
708 
709 #include "iscsi_target_stat.h"
710 
711 struct iscsi_node_stat_grps {
712  struct config_group iscsi_sess_stats_group;
713  struct config_group iscsi_conn_stats_group;
714 };
715 
716 struct iscsi_node_acl {
717  struct iscsi_node_attrib node_attrib;
718  struct iscsi_node_auth node_auth;
719  struct iscsi_node_stat_grps node_stat_grps;
720  struct se_node_acl se_node_acl;
721 };
722 
723 #define NODE_STAT_GRPS(nacl) (&(nacl)->node_stat_grps)
724 
725 #define ISCSI_NODE_ATTRIB(t) (&(t)->node_attrib)
726 #define ISCSI_NODE_AUTH(t) (&(t)->node_auth)
727 
728 struct iscsi_tpg_attrib {
729  u32 authentication;
730  u32 login_timeout;
731  u32 netif_timeout;
732  u32 generate_node_acls;
733  u32 cache_dynamic_acls;
734  u32 default_cmdsn_depth;
735  u32 demo_mode_write_protect;
736  u32 prod_mode_write_protect;
737  struct iscsi_portal_group *tpg;
738 };
739 
740 struct iscsi_np {
741  int np_network_transport;
742  int np_ip_proto;
743  int np_sock_type;
744  enum np_thread_state_table np_thread_state;
745  enum iscsi_timer_flags_table np_login_timer_flags;
746  u32 np_exports;
747  enum np_flags_table np_flags;
748  unsigned char np_ip[IPV6_ADDRESS_SPACE];
749  u16 np_port;
750  spinlock_t np_thread_lock;
751  struct completion np_restart_comp;
752  struct socket *np_socket;
753  struct __kernel_sockaddr_storage np_sockaddr;
754  struct task_struct *np_thread;
755  struct timer_list np_login_timer;
756  struct iscsi_portal_group *np_login_tpg;
757  struct list_head np_list;
758 } ____cacheline_aligned;
759 
760 struct iscsi_tpg_np {
761  struct iscsi_np *tpg_np;
762  struct iscsi_portal_group *tpg;
763  struct iscsi_tpg_np *tpg_np_parent;
764  struct list_head tpg_np_list;
765  struct list_head tpg_np_child_list;
766  struct list_head tpg_np_parent_list;
767  struct se_tpg_np se_tpg_np;
768  spinlock_t tpg_np_parent_lock;
769 };
770 
771 struct iscsi_portal_group {
772  unsigned char tpg_chap_id;
773  /* TPG State */
774  enum tpg_state_table tpg_state;
775  /* Target Portal Group Tag */
776  u16 tpgt;
777  /* Id assigned to target sessions */
778  u16 ntsih;
779  /* Number of active sessions */
780  u32 nsessions;
781  /* Number of Network Portals available for this TPG */
782  u32 num_tpg_nps;
783  /* Per TPG LIO specific session ID. */
784  u32 sid;
785  /* Spinlock for adding/removing Network Portals */
786  spinlock_t tpg_np_lock;
787  spinlock_t tpg_state_lock;
788  struct se_portal_group tpg_se_tpg;
789  struct mutex tpg_access_lock;
790  struct mutex np_login_lock;
791  struct iscsi_tpg_attrib tpg_attrib;
792  /* Pointer to default list of iSCSI parameters for TPG */
793  struct iscsi_param_list *param_list;
794  struct iscsi_tiqn *tpg_tiqn;
795  struct list_head tpg_gnp_list;
796  struct list_head tpg_list;
797 } ____cacheline_aligned;
798 
799 #define ISCSI_TPG_C(c) ((struct iscsi_portal_group *)(c)->tpg)
800 #define ISCSI_TPG_LUN(c, l) ((iscsi_tpg_list_t *)(c)->tpg->tpg_lun_list_t[l])
801 #define ISCSI_TPG_S(s) ((struct iscsi_portal_group *)(s)->tpg)
802 #define ISCSI_TPG_ATTRIB(t) (&(t)->tpg_attrib)
803 #define SE_TPG(tpg) (&(tpg)->tpg_se_tpg)
804 
805 struct iscsi_wwn_stat_grps {
806  struct config_group iscsi_stat_group;
807  struct config_group iscsi_instance_group;
808  struct config_group iscsi_sess_err_group;
809  struct config_group iscsi_tgt_attr_group;
810  struct config_group iscsi_login_stats_group;
811  struct config_group iscsi_logout_stats_group;
812 };
813 
814 struct iscsi_tiqn {
815 #define ISCSI_IQN_LEN 224
816  unsigned char tiqn[ISCSI_IQN_LEN];
817  enum tiqn_state_table tiqn_state;
818  int tiqn_access_count;
819  u32 tiqn_active_tpgs;
820  u32 tiqn_ntpgs;
821  u32 tiqn_num_tpg_nps;
822  u32 tiqn_nsessions;
823  struct list_head tiqn_list;
824  struct list_head tiqn_tpg_list;
825  spinlock_t tiqn_state_lock;
826  spinlock_t tiqn_tpg_lock;
827  struct se_wwn tiqn_wwn;
828  struct iscsi_wwn_stat_grps tiqn_stat_grps;
829  int tiqn_index;
830  struct iscsi_sess_err_stats sess_err_stats;
831  struct iscsi_login_stats login_stats;
832  struct iscsi_logout_stats logout_stats;
833 } ____cacheline_aligned;
834 
835 #define WWN_STAT_GRPS(tiqn) (&(tiqn)->tiqn_stat_grps)
836 
837 struct iscsit_global {
838  /* In core shutdown */
839  u32 in_shutdown;
840  u32 active_ts;
841  /* Unique identifier used for the authentication daemon */
842  u32 auth_id;
843  u32 inactive_ts;
844  /* Thread Set bitmap count */
845  int ts_bitmap_count;
846  /* Thread Set bitmap pointer */
847  unsigned long *ts_bitmap;
848  /* Used for iSCSI discovery session authentication */
849  struct iscsi_node_acl discovery_acl;
850  struct iscsi_portal_group *discovery_tpg;
851 };
852 
853 #endif /* ISCSI_TARGET_CORE_H */
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