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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-rc1" | |
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 5 | |
29 | #define NA_NOPIN_TIMEOUT_MAX 60 | |
30 | #define NA_NOPIN_TIMEOUT_MIN 3 | |
31 | #define NA_NOPIN_RESPONSE_TIMEOUT 5 | |
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 | enum tpg_np_network_transport_table { | |
61 | ISCSI_TCP = 0, | |
62 | ISCSI_SCTP_TCP = 1, | |
63 | ISCSI_SCTP_UDP = 2, | |
64 | ISCSI_IWARP_TCP = 3, | |
65 | ISCSI_IWARP_SCTP = 4, | |
66 | ISCSI_INFINIBAND = 5, | |
67 | }; | |
68 | ||
69 | /* RFC-3720 7.1.4 Standard Connection State Diagram for a Target */ | |
70 | enum target_conn_state_table { | |
71 | TARG_CONN_STATE_FREE = 0x1, | |
72 | TARG_CONN_STATE_XPT_UP = 0x3, | |
73 | TARG_CONN_STATE_IN_LOGIN = 0x4, | |
74 | TARG_CONN_STATE_LOGGED_IN = 0x5, | |
75 | TARG_CONN_STATE_IN_LOGOUT = 0x6, | |
76 | TARG_CONN_STATE_LOGOUT_REQUESTED = 0x7, | |
77 | TARG_CONN_STATE_CLEANUP_WAIT = 0x8, | |
78 | }; | |
79 | ||
80 | /* RFC-3720 7.3.2 Session State Diagram for a Target */ | |
81 | enum target_sess_state_table { | |
82 | TARG_SESS_STATE_FREE = 0x1, | |
83 | TARG_SESS_STATE_ACTIVE = 0x2, | |
84 | TARG_SESS_STATE_LOGGED_IN = 0x3, | |
85 | TARG_SESS_STATE_FAILED = 0x4, | |
86 | TARG_SESS_STATE_IN_CONTINUE = 0x5, | |
87 | }; | |
88 | ||
89 | /* struct iscsi_data_count->type */ | |
90 | enum data_count_type { | |
91 | ISCSI_RX_DATA = 1, | |
92 | ISCSI_TX_DATA = 2, | |
93 | }; | |
94 | ||
95 | /* struct iscsi_datain_req->dr_complete */ | |
96 | enum datain_req_comp_table { | |
97 | DATAIN_COMPLETE_NORMAL = 1, | |
98 | DATAIN_COMPLETE_WITHIN_COMMAND_RECOVERY = 2, | |
99 | DATAIN_COMPLETE_CONNECTION_RECOVERY = 3, | |
100 | }; | |
101 | ||
102 | /* struct iscsi_datain_req->recovery */ | |
103 | enum datain_req_rec_table { | |
104 | DATAIN_WITHIN_COMMAND_RECOVERY = 1, | |
105 | DATAIN_CONNECTION_RECOVERY = 2, | |
106 | }; | |
107 | ||
108 | /* struct iscsi_portal_group->state */ | |
109 | enum tpg_state_table { | |
110 | TPG_STATE_FREE = 0, | |
111 | TPG_STATE_ACTIVE = 1, | |
112 | TPG_STATE_INACTIVE = 2, | |
113 | TPG_STATE_COLD_RESET = 3, | |
114 | }; | |
115 | ||
116 | /* struct iscsi_tiqn->tiqn_state */ | |
117 | enum tiqn_state_table { | |
118 | TIQN_STATE_ACTIVE = 1, | |
119 | TIQN_STATE_SHUTDOWN = 2, | |
120 | }; | |
121 | ||
122 | /* struct iscsi_cmd->cmd_flags */ | |
123 | enum cmd_flags_table { | |
124 | ICF_GOT_LAST_DATAOUT = 0x00000001, | |
125 | ICF_GOT_DATACK_SNACK = 0x00000002, | |
126 | ICF_NON_IMMEDIATE_UNSOLICITED_DATA = 0x00000004, | |
127 | ICF_SENT_LAST_R2T = 0x00000008, | |
128 | ICF_WITHIN_COMMAND_RECOVERY = 0x00000010, | |
129 | ICF_CONTIG_MEMORY = 0x00000020, | |
130 | ICF_ATTACHED_TO_RQUEUE = 0x00000040, | |
131 | ICF_OOO_CMDSN = 0x00000080, | |
132 | ICF_REJECT_FAIL_CONN = 0x00000100, | |
133 | }; | |
134 | ||
135 | /* struct iscsi_cmd->i_state */ | |
136 | enum cmd_i_state_table { | |
137 | ISTATE_NO_STATE = 0, | |
138 | ISTATE_NEW_CMD = 1, | |
139 | ISTATE_DEFERRED_CMD = 2, | |
140 | ISTATE_UNSOLICITED_DATA = 3, | |
141 | ISTATE_RECEIVE_DATAOUT = 4, | |
142 | ISTATE_RECEIVE_DATAOUT_RECOVERY = 5, | |
143 | ISTATE_RECEIVED_LAST_DATAOUT = 6, | |
144 | ISTATE_WITHIN_DATAOUT_RECOVERY = 7, | |
145 | ISTATE_IN_CONNECTION_RECOVERY = 8, | |
146 | ISTATE_RECEIVED_TASKMGT = 9, | |
147 | ISTATE_SEND_ASYNCMSG = 10, | |
148 | ISTATE_SENT_ASYNCMSG = 11, | |
149 | ISTATE_SEND_DATAIN = 12, | |
150 | ISTATE_SEND_LAST_DATAIN = 13, | |
151 | ISTATE_SENT_LAST_DATAIN = 14, | |
152 | ISTATE_SEND_LOGOUTRSP = 15, | |
153 | ISTATE_SENT_LOGOUTRSP = 16, | |
154 | ISTATE_SEND_NOPIN = 17, | |
155 | ISTATE_SENT_NOPIN = 18, | |
156 | ISTATE_SEND_REJECT = 19, | |
157 | ISTATE_SENT_REJECT = 20, | |
158 | ISTATE_SEND_R2T = 21, | |
159 | ISTATE_SENT_R2T = 22, | |
160 | ISTATE_SEND_R2T_RECOVERY = 23, | |
161 | ISTATE_SENT_R2T_RECOVERY = 24, | |
162 | ISTATE_SEND_LAST_R2T = 25, | |
163 | ISTATE_SENT_LAST_R2T = 26, | |
164 | ISTATE_SEND_LAST_R2T_RECOVERY = 27, | |
165 | ISTATE_SENT_LAST_R2T_RECOVERY = 28, | |
166 | ISTATE_SEND_STATUS = 29, | |
167 | ISTATE_SEND_STATUS_BROKEN_PC = 30, | |
168 | ISTATE_SENT_STATUS = 31, | |
169 | ISTATE_SEND_STATUS_RECOVERY = 32, | |
170 | ISTATE_SENT_STATUS_RECOVERY = 33, | |
171 | ISTATE_SEND_TASKMGTRSP = 34, | |
172 | ISTATE_SENT_TASKMGTRSP = 35, | |
173 | ISTATE_SEND_TEXTRSP = 36, | |
174 | ISTATE_SENT_TEXTRSP = 37, | |
175 | ISTATE_SEND_NOPIN_WANT_RESPONSE = 38, | |
176 | ISTATE_SENT_NOPIN_WANT_RESPONSE = 39, | |
177 | ISTATE_SEND_NOPIN_NO_RESPONSE = 40, | |
178 | ISTATE_REMOVE = 41, | |
179 | ISTATE_FREE = 42, | |
180 | }; | |
181 | ||
182 | /* Used for iscsi_recover_cmdsn() return values */ | |
183 | enum recover_cmdsn_ret_table { | |
184 | CMDSN_ERROR_CANNOT_RECOVER = -1, | |
185 | CMDSN_NORMAL_OPERATION = 0, | |
186 | CMDSN_LOWER_THAN_EXP = 1, | |
187 | CMDSN_HIGHER_THAN_EXP = 2, | |
188 | }; | |
189 | ||
190 | /* Used for iscsi_handle_immediate_data() return values */ | |
191 | enum immedate_data_ret_table { | |
192 | IMMEDIATE_DATA_CANNOT_RECOVER = -1, | |
193 | IMMEDIATE_DATA_NORMAL_OPERATION = 0, | |
194 | IMMEDIATE_DATA_ERL1_CRC_FAILURE = 1, | |
195 | }; | |
196 | ||
197 | /* Used for iscsi_decide_dataout_action() return values */ | |
198 | enum dataout_action_ret_table { | |
199 | DATAOUT_CANNOT_RECOVER = -1, | |
200 | DATAOUT_NORMAL = 0, | |
201 | DATAOUT_SEND_R2T = 1, | |
202 | DATAOUT_SEND_TO_TRANSPORT = 2, | |
203 | DATAOUT_WITHIN_COMMAND_RECOVERY = 3, | |
204 | }; | |
205 | ||
206 | /* Used for struct iscsi_node_auth->naf_flags */ | |
207 | enum naf_flags_table { | |
208 | NAF_USERID_SET = 0x01, | |
209 | NAF_PASSWORD_SET = 0x02, | |
210 | NAF_USERID_IN_SET = 0x04, | |
211 | NAF_PASSWORD_IN_SET = 0x08, | |
212 | }; | |
213 | ||
214 | /* Used by various struct timer_list to manage iSCSI specific state */ | |
215 | enum iscsi_timer_flags_table { | |
216 | ISCSI_TF_RUNNING = 0x01, | |
217 | ISCSI_TF_STOP = 0x02, | |
218 | ISCSI_TF_EXPIRED = 0x04, | |
219 | }; | |
220 | ||
221 | /* Used for struct iscsi_np->np_flags */ | |
222 | enum np_flags_table { | |
223 | NPF_IP_NETWORK = 0x00, | |
224 | NPF_SCTP_STRUCT_FILE = 0x01 /* Bugfix */ | |
225 | }; | |
226 | ||
227 | /* Used for struct iscsi_np->np_thread_state */ | |
228 | enum np_thread_state_table { | |
229 | ISCSI_NP_THREAD_ACTIVE = 1, | |
230 | ISCSI_NP_THREAD_INACTIVE = 2, | |
231 | ISCSI_NP_THREAD_RESET = 3, | |
232 | ISCSI_NP_THREAD_SHUTDOWN = 4, | |
233 | ISCSI_NP_THREAD_EXIT = 5, | |
234 | }; | |
235 | ||
236 | struct iscsi_conn_ops { | |
237 | u8 HeaderDigest; /* [0,1] == [None,CRC32C] */ | |
238 | u8 DataDigest; /* [0,1] == [None,CRC32C] */ | |
239 | u32 MaxRecvDataSegmentLength; /* [512..2**24-1] */ | |
240 | u8 OFMarker; /* [0,1] == [No,Yes] */ | |
241 | u8 IFMarker; /* [0,1] == [No,Yes] */ | |
242 | u32 OFMarkInt; /* [1..65535] */ | |
243 | u32 IFMarkInt; /* [1..65535] */ | |
244 | }; | |
245 | ||
246 | struct iscsi_sess_ops { | |
247 | char InitiatorName[224]; | |
248 | char InitiatorAlias[256]; | |
249 | char TargetName[224]; | |
250 | char TargetAlias[256]; | |
251 | char TargetAddress[256]; | |
252 | u16 TargetPortalGroupTag; /* [0..65535] */ | |
253 | u16 MaxConnections; /* [1..65535] */ | |
254 | u8 InitialR2T; /* [0,1] == [No,Yes] */ | |
255 | u8 ImmediateData; /* [0,1] == [No,Yes] */ | |
256 | u32 MaxBurstLength; /* [512..2**24-1] */ | |
257 | u32 FirstBurstLength; /* [512..2**24-1] */ | |
258 | u16 DefaultTime2Wait; /* [0..3600] */ | |
259 | u16 DefaultTime2Retain; /* [0..3600] */ | |
260 | u16 MaxOutstandingR2T; /* [1..65535] */ | |
261 | u8 DataPDUInOrder; /* [0,1] == [No,Yes] */ | |
262 | u8 DataSequenceInOrder; /* [0,1] == [No,Yes] */ | |
263 | u8 ErrorRecoveryLevel; /* [0..2] */ | |
264 | u8 SessionType; /* [0,1] == [Normal,Discovery]*/ | |
265 | }; | |
266 | ||
267 | struct iscsi_queue_req { | |
268 | int state; | |
269 | struct iscsi_cmd *cmd; | |
270 | struct list_head qr_list; | |
271 | }; | |
272 | ||
273 | struct iscsi_data_count { | |
274 | int data_length; | |
275 | int sync_and_steering; | |
276 | enum data_count_type type; | |
277 | u32 iov_count; | |
278 | u32 ss_iov_count; | |
279 | u32 ss_marker_count; | |
280 | struct kvec *iov; | |
281 | }; | |
282 | ||
283 | struct iscsi_param_list { | |
284 | struct list_head param_list; | |
285 | struct list_head extra_response_list; | |
286 | }; | |
287 | ||
288 | struct iscsi_datain_req { | |
289 | enum datain_req_comp_table dr_complete; | |
290 | int generate_recovery_values; | |
291 | enum datain_req_rec_table recovery; | |
292 | u32 begrun; | |
293 | u32 runlength; | |
294 | u32 data_length; | |
295 | u32 data_offset; | |
296 | u32 data_offset_end; | |
297 | u32 data_sn; | |
298 | u32 next_burst_len; | |
299 | u32 read_data_done; | |
300 | u32 seq_send_order; | |
301 | struct list_head dr_list; | |
302 | } ____cacheline_aligned; | |
303 | ||
304 | struct iscsi_ooo_cmdsn { | |
305 | u16 cid; | |
306 | u32 batch_count; | |
307 | u32 cmdsn; | |
308 | u32 exp_cmdsn; | |
309 | struct iscsi_cmd *cmd; | |
310 | struct list_head ooo_list; | |
311 | } ____cacheline_aligned; | |
312 | ||
313 | struct iscsi_datain { | |
314 | u8 flags; | |
315 | u32 data_sn; | |
316 | u32 length; | |
317 | u32 offset; | |
318 | } ____cacheline_aligned; | |
319 | ||
320 | struct iscsi_r2t { | |
321 | int seq_complete; | |
322 | int recovery_r2t; | |
323 | int sent_r2t; | |
324 | u32 r2t_sn; | |
325 | u32 offset; | |
326 | u32 targ_xfer_tag; | |
327 | u32 xfer_len; | |
328 | struct list_head r2t_list; | |
329 | } ____cacheline_aligned; | |
330 | ||
331 | struct iscsi_cmd { | |
332 | enum iscsi_timer_flags_table dataout_timer_flags; | |
333 | /* DataOUT timeout retries */ | |
334 | u8 dataout_timeout_retries; | |
335 | /* Within command recovery count */ | |
336 | u8 error_recovery_count; | |
337 | /* iSCSI dependent state for out or order CmdSNs */ | |
338 | enum cmd_i_state_table deferred_i_state; | |
339 | /* iSCSI dependent state */ | |
340 | enum cmd_i_state_table i_state; | |
341 | /* Command is an immediate command (ISCSI_OP_IMMEDIATE set) */ | |
342 | u8 immediate_cmd; | |
343 | /* Immediate data present */ | |
344 | u8 immediate_data; | |
345 | /* iSCSI Opcode */ | |
346 | u8 iscsi_opcode; | |
347 | /* iSCSI Response Code */ | |
348 | u8 iscsi_response; | |
349 | /* Logout reason when iscsi_opcode == ISCSI_INIT_LOGOUT_CMND */ | |
350 | u8 logout_reason; | |
351 | /* Logout response code when iscsi_opcode == ISCSI_INIT_LOGOUT_CMND */ | |
352 | u8 logout_response; | |
353 | /* MaxCmdSN has been incremented */ | |
354 | u8 maxcmdsn_inc; | |
355 | /* Immediate Unsolicited Dataout */ | |
356 | u8 unsolicited_data; | |
357 | /* CID contained in logout PDU when opcode == ISCSI_INIT_LOGOUT_CMND */ | |
358 | u16 logout_cid; | |
359 | /* Command flags */ | |
360 | enum cmd_flags_table cmd_flags; | |
361 | /* Initiator Task Tag assigned from Initiator */ | |
362 | u32 init_task_tag; | |
363 | /* Target Transfer Tag assigned from Target */ | |
364 | u32 targ_xfer_tag; | |
365 | /* CmdSN assigned from Initiator */ | |
366 | u32 cmd_sn; | |
367 | /* ExpStatSN assigned from Initiator */ | |
368 | u32 exp_stat_sn; | |
369 | /* StatSN assigned to this ITT */ | |
370 | u32 stat_sn; | |
371 | /* DataSN Counter */ | |
372 | u32 data_sn; | |
373 | /* R2TSN Counter */ | |
374 | u32 r2t_sn; | |
375 | /* Last DataSN acknowledged via DataAck SNACK */ | |
376 | u32 acked_data_sn; | |
377 | /* Used for echoing NOPOUT ping data */ | |
378 | u32 buf_ptr_size; | |
379 | /* Used to store DataDigest */ | |
380 | u32 data_crc; | |
381 | /* Total size in bytes associated with command */ | |
382 | u32 data_length; | |
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 | u32 residual_count; | |
399 | /* Next struct iscsi_seq to send in struct iscsi_cmd->seq_list */ | |
400 | u32 seq_send_order; | |
401 | /* Number of struct iscsi_seq in struct iscsi_cmd->seq_list */ | |
402 | u32 seq_count; | |
403 | /* Current struct iscsi_seq in struct iscsi_cmd->seq_list */ | |
404 | u32 seq_no; | |
405 | /* Lowest offset in current DataOUT sequence */ | |
406 | u32 seq_start_offset; | |
407 | /* Highest offset in current DataOUT sequence */ | |
408 | u32 seq_end_offset; | |
409 | /* Total size in bytes received so far of READ data */ | |
410 | u32 read_data_done; | |
411 | /* Total size in bytes received so far of WRITE data */ | |
412 | u32 write_data_done; | |
413 | /* Counter for FirstBurstLength key */ | |
414 | u32 first_burst_len; | |
415 | /* Counter for MaxBurstLength key */ | |
416 | u32 next_burst_len; | |
417 | /* Transfer size used for IP stack calls */ | |
418 | u32 tx_size; | |
419 | /* Buffer used for various purposes */ | |
420 | void *buf_ptr; | |
421 | /* See include/linux/dma-mapping.h */ | |
422 | enum dma_data_direction data_direction; | |
423 | /* iSCSI PDU Header + CRC */ | |
424 | unsigned char pdu[ISCSI_HDR_LEN + ISCSI_CRC_LEN]; | |
425 | /* Number of times struct iscsi_cmd is present in immediate queue */ | |
426 | atomic_t immed_queue_count; | |
427 | atomic_t response_queue_count; | |
428 | atomic_t transport_sent; | |
429 | spinlock_t datain_lock; | |
430 | spinlock_t dataout_timeout_lock; | |
431 | /* spinlock for protecting struct iscsi_cmd->i_state */ | |
432 | spinlock_t istate_lock; | |
433 | /* spinlock for adding within command recovery entries */ | |
434 | spinlock_t error_lock; | |
435 | /* spinlock for adding R2Ts */ | |
436 | spinlock_t r2t_lock; | |
437 | /* DataIN List */ | |
438 | struct list_head datain_list; | |
439 | /* R2T List */ | |
440 | struct list_head cmd_r2t_list; | |
441 | struct completion reject_comp; | |
442 | /* Timer for DataOUT */ | |
443 | struct timer_list dataout_timer; | |
444 | /* Iovecs for SCSI data payload RX/TX w/ kernel level sockets */ | |
445 | struct kvec *iov_data; | |
446 | /* Iovecs for miscellaneous purposes */ | |
447 | #define ISCSI_MISC_IOVECS 5 | |
448 | struct kvec iov_misc[ISCSI_MISC_IOVECS]; | |
449 | /* Array of struct iscsi_pdu used for DataPDUInOrder=No */ | |
450 | struct iscsi_pdu *pdu_list; | |
451 | /* Current struct iscsi_pdu used for DataPDUInOrder=No */ | |
452 | struct iscsi_pdu *pdu_ptr; | |
453 | /* Array of struct iscsi_seq used for DataSequenceInOrder=No */ | |
454 | struct iscsi_seq *seq_list; | |
455 | /* Current struct iscsi_seq used for DataSequenceInOrder=No */ | |
456 | struct iscsi_seq *seq_ptr; | |
457 | /* TMR Request when iscsi_opcode == ISCSI_OP_SCSI_TMFUNC */ | |
458 | struct iscsi_tmr_req *tmr_req; | |
459 | /* Connection this command is alligient to */ | |
460 | struct iscsi_conn *conn; | |
461 | /* Pointer to connection recovery entry */ | |
462 | struct iscsi_conn_recovery *cr; | |
463 | /* Session the command is part of, used for connection recovery */ | |
464 | struct iscsi_session *sess; | |
465 | /* list_head for connection list */ | |
466 | struct list_head i_list; | |
467 | /* The TCM I/O descriptor that is accessed via container_of() */ | |
468 | struct se_cmd se_cmd; | |
469 | /* Sense buffer that will be mapped into outgoing status */ | |
470 | #define ISCSI_SENSE_BUFFER_LEN (TRANSPORT_SENSE_BUFFER + 2) | |
471 | unsigned char sense_buffer[ISCSI_SENSE_BUFFER_LEN]; | |
472 | ||
473 | struct scatterlist *t_mem_sg; | |
474 | u32 t_mem_sg_nents; | |
475 | ||
476 | u32 padding; | |
477 | u8 pad_bytes[4]; | |
478 | ||
479 | struct scatterlist *first_data_sg; | |
480 | u32 first_data_sg_off; | |
481 | u32 kmapped_nents; | |
482 | ||
483 | } ____cacheline_aligned; | |
484 | ||
485 | struct iscsi_tmr_req { | |
486 | bool task_reassign:1; | |
487 | u32 ref_cmd_sn; | |
488 | u32 exp_data_sn; | |
489 | struct iscsi_conn_recovery *conn_recovery; | |
490 | struct se_tmr_req *se_tmr_req; | |
491 | }; | |
492 | ||
493 | struct iscsi_conn { | |
494 | /* Authentication Successful for this connection */ | |
495 | u8 auth_complete; | |
496 | /* State connection is currently in */ | |
497 | u8 conn_state; | |
498 | u8 conn_logout_reason; | |
499 | u8 network_transport; | |
500 | enum iscsi_timer_flags_table nopin_timer_flags; | |
501 | enum iscsi_timer_flags_table nopin_response_timer_flags; | |
502 | u8 tx_immediate_queue; | |
503 | u8 tx_response_queue; | |
504 | /* Used to know what thread encountered a transport failure */ | |
505 | u8 which_thread; | |
506 | /* connection id assigned by the Initiator */ | |
507 | u16 cid; | |
508 | /* Remote TCP Port */ | |
509 | u16 login_port; | |
510 | int net_size; | |
511 | u32 auth_id; | |
512 | #define CONNFLAG_SCTP_STRUCT_FILE 0x01 | |
513 | u32 conn_flags; | |
514 | /* Used for iscsi_tx_login_rsp() */ | |
515 | u32 login_itt; | |
516 | u32 exp_statsn; | |
517 | /* Per connection status sequence number */ | |
518 | u32 stat_sn; | |
519 | /* IFMarkInt's Current Value */ | |
520 | u32 if_marker; | |
521 | /* OFMarkInt's Current Value */ | |
522 | u32 of_marker; | |
523 | /* Used for calculating OFMarker offset to next PDU */ | |
524 | u32 of_marker_offset; | |
525 | /* Complete Bad PDU for sending reject */ | |
526 | unsigned char bad_hdr[ISCSI_HDR_LEN]; | |
527 | #define IPV6_ADDRESS_SPACE 48 | |
528 | unsigned char login_ip[IPV6_ADDRESS_SPACE]; | |
529 | int conn_usage_count; | |
530 | int conn_waiting_on_uc; | |
531 | atomic_t check_immediate_queue; | |
532 | atomic_t conn_logout_remove; | |
533 | atomic_t connection_exit; | |
534 | atomic_t connection_recovery; | |
535 | atomic_t connection_reinstatement; | |
536 | atomic_t connection_wait; | |
537 | atomic_t connection_wait_rcfr; | |
538 | atomic_t sleep_on_conn_wait_comp; | |
539 | atomic_t transport_failed; | |
540 | struct completion conn_post_wait_comp; | |
541 | struct completion conn_wait_comp; | |
542 | struct completion conn_wait_rcfr_comp; | |
543 | struct completion conn_waiting_on_uc_comp; | |
544 | struct completion conn_logout_comp; | |
545 | struct completion tx_half_close_comp; | |
546 | struct completion rx_half_close_comp; | |
547 | /* socket used by this connection */ | |
548 | struct socket *sock; | |
549 | struct timer_list nopin_timer; | |
550 | struct timer_list nopin_response_timer; | |
551 | struct timer_list transport_timer; | |
552 | /* Spinlock used for add/deleting cmd's from conn_cmd_list */ | |
553 | spinlock_t cmd_lock; | |
554 | spinlock_t conn_usage_lock; | |
555 | spinlock_t immed_queue_lock; | |
556 | spinlock_t nopin_timer_lock; | |
557 | spinlock_t response_queue_lock; | |
558 | spinlock_t state_lock; | |
559 | /* libcrypto RX and TX contexts for crc32c */ | |
560 | struct hash_desc conn_rx_hash; | |
561 | struct hash_desc conn_tx_hash; | |
562 | /* Used for scheduling TX and RX connection kthreads */ | |
563 | cpumask_var_t conn_cpumask; | |
564 | int conn_rx_reset_cpumask:1; | |
565 | int conn_tx_reset_cpumask:1; | |
566 | /* list_head of struct iscsi_cmd for this connection */ | |
567 | struct list_head conn_cmd_list; | |
568 | struct list_head immed_queue_list; | |
569 | struct list_head response_queue_list; | |
570 | struct iscsi_conn_ops *conn_ops; | |
571 | struct iscsi_param_list *param_list; | |
572 | /* Used for per connection auth state machine */ | |
573 | void *auth_protocol; | |
574 | struct iscsi_login_thread_s *login_thread; | |
575 | struct iscsi_portal_group *tpg; | |
576 | /* Pointer to parent session */ | |
577 | struct iscsi_session *sess; | |
578 | /* Pointer to thread_set in use for this conn's threads */ | |
579 | struct iscsi_thread_set *thread_set; | |
580 | /* list_head for session connection list */ | |
581 | struct list_head conn_list; | |
582 | } ____cacheline_aligned; | |
583 | ||
584 | struct iscsi_conn_recovery { | |
585 | u16 cid; | |
586 | u32 cmd_count; | |
587 | u32 maxrecvdatasegmentlength; | |
588 | int ready_for_reallegiance; | |
589 | struct list_head conn_recovery_cmd_list; | |
590 | spinlock_t conn_recovery_cmd_lock; | |
591 | struct timer_list time2retain_timer; | |
592 | struct iscsi_session *sess; | |
593 | struct list_head cr_list; | |
594 | } ____cacheline_aligned; | |
595 | ||
596 | struct iscsi_session { | |
597 | u8 initiator_vendor; | |
598 | u8 isid[6]; | |
599 | enum iscsi_timer_flags_table time2retain_timer_flags; | |
600 | u8 version_active; | |
601 | u16 cid_called; | |
602 | u16 conn_recovery_count; | |
603 | u16 tsih; | |
604 | /* state session is currently in */ | |
605 | u32 session_state; | |
606 | /* session wide counter: initiator assigned task tag */ | |
607 | u32 init_task_tag; | |
608 | /* session wide counter: target assigned task tag */ | |
609 | u32 targ_xfer_tag; | |
610 | u32 cmdsn_window; | |
611 | ||
612 | /* protects cmdsn values */ | |
613 | struct mutex cmdsn_mutex; | |
614 | /* session wide counter: expected command sequence number */ | |
615 | u32 exp_cmd_sn; | |
616 | /* session wide counter: maximum allowed command sequence number */ | |
617 | u32 max_cmd_sn; | |
618 | struct list_head sess_ooo_cmdsn_list; | |
619 | ||
620 | /* LIO specific session ID */ | |
621 | u32 sid; | |
622 | char auth_type[8]; | |
623 | /* unique within the target */ | |
624 | int session_index; | |
625 | /* Used for session reference counting */ | |
626 | int session_usage_count; | |
627 | int session_waiting_on_uc; | |
628 | u32 cmd_pdus; | |
629 | u32 rsp_pdus; | |
630 | u64 tx_data_octets; | |
631 | u64 rx_data_octets; | |
632 | u32 conn_digest_errors; | |
633 | u32 conn_timeout_errors; | |
634 | u64 creation_time; | |
635 | spinlock_t session_stats_lock; | |
636 | /* Number of active connections */ | |
637 | atomic_t nconn; | |
638 | atomic_t session_continuation; | |
639 | atomic_t session_fall_back_to_erl0; | |
640 | atomic_t session_logout; | |
641 | atomic_t session_reinstatement; | |
642 | atomic_t session_stop_active; | |
643 | atomic_t sleep_on_sess_wait_comp; | |
644 | atomic_t transport_wait_cmds; | |
645 | /* connection list */ | |
646 | struct list_head sess_conn_list; | |
647 | struct list_head cr_active_list; | |
648 | struct list_head cr_inactive_list; | |
649 | spinlock_t conn_lock; | |
650 | spinlock_t cr_a_lock; | |
651 | spinlock_t cr_i_lock; | |
652 | spinlock_t session_usage_lock; | |
653 | spinlock_t ttt_lock; | |
654 | struct completion async_msg_comp; | |
655 | struct completion reinstatement_comp; | |
656 | struct completion session_wait_comp; | |
657 | struct completion session_waiting_on_uc_comp; | |
658 | struct timer_list time2retain_timer; | |
659 | struct iscsi_sess_ops *sess_ops; | |
660 | struct se_session *se_sess; | |
661 | struct iscsi_portal_group *tpg; | |
662 | } ____cacheline_aligned; | |
663 | ||
664 | struct iscsi_login { | |
665 | u8 auth_complete; | |
666 | u8 checked_for_existing; | |
667 | u8 current_stage; | |
668 | u8 leading_connection; | |
669 | u8 first_request; | |
670 | u8 version_min; | |
671 | u8 version_max; | |
672 | char isid[6]; | |
673 | u32 cmd_sn; | |
674 | u32 init_task_tag; | |
675 | u32 initial_exp_statsn; | |
676 | u32 rsp_length; | |
677 | u16 cid; | |
678 | u16 tsih; | |
679 | char *req; | |
680 | char *rsp; | |
681 | char *req_buf; | |
682 | char *rsp_buf; | |
683 | } ____cacheline_aligned; | |
684 | ||
685 | struct iscsi_node_attrib { | |
686 | u32 dataout_timeout; | |
687 | u32 dataout_timeout_retries; | |
688 | u32 default_erl; | |
689 | u32 nopin_timeout; | |
690 | u32 nopin_response_timeout; | |
691 | u32 random_datain_pdu_offsets; | |
692 | u32 random_datain_seq_offsets; | |
693 | u32 random_r2t_offsets; | |
694 | u32 tmr_cold_reset; | |
695 | u32 tmr_warm_reset; | |
696 | struct iscsi_node_acl *nacl; | |
697 | }; | |
698 | ||
699 | struct se_dev_entry_s; | |
700 | ||
701 | struct iscsi_node_auth { | |
702 | enum naf_flags_table naf_flags; | |
703 | int authenticate_target; | |
704 | /* Used for iscsit_global->discovery_auth, | |
705 | * set to zero (auth disabled) by default */ | |
706 | int enforce_discovery_auth; | |
707 | #define MAX_USER_LEN 256 | |
708 | #define MAX_PASS_LEN 256 | |
709 | char userid[MAX_USER_LEN]; | |
710 | char password[MAX_PASS_LEN]; | |
711 | char userid_mutual[MAX_USER_LEN]; | |
712 | char password_mutual[MAX_PASS_LEN]; | |
713 | }; | |
714 | ||
715 | #include "iscsi_target_stat.h" | |
716 | ||
717 | struct iscsi_node_stat_grps { | |
718 | struct config_group iscsi_sess_stats_group; | |
719 | struct config_group iscsi_conn_stats_group; | |
720 | }; | |
721 | ||
722 | struct iscsi_node_acl { | |
723 | struct iscsi_node_attrib node_attrib; | |
724 | struct iscsi_node_auth node_auth; | |
725 | struct iscsi_node_stat_grps node_stat_grps; | |
726 | struct se_node_acl se_node_acl; | |
727 | }; | |
728 | ||
729 | #define NODE_STAT_GRPS(nacl) (&(nacl)->node_stat_grps) | |
730 | ||
731 | #define ISCSI_NODE_ATTRIB(t) (&(t)->node_attrib) | |
732 | #define ISCSI_NODE_AUTH(t) (&(t)->node_auth) | |
733 | ||
734 | struct iscsi_tpg_attrib { | |
735 | u32 authentication; | |
736 | u32 login_timeout; | |
737 | u32 netif_timeout; | |
738 | u32 generate_node_acls; | |
739 | u32 cache_dynamic_acls; | |
740 | u32 default_cmdsn_depth; | |
741 | u32 demo_mode_write_protect; | |
742 | u32 prod_mode_write_protect; | |
743 | struct iscsi_portal_group *tpg; | |
744 | }; | |
745 | ||
746 | struct iscsi_np { | |
747 | int np_network_transport; | |
748 | int np_ip_proto; | |
749 | int np_sock_type; | |
750 | enum np_thread_state_table np_thread_state; | |
751 | enum iscsi_timer_flags_table np_login_timer_flags; | |
752 | u32 np_exports; | |
753 | enum np_flags_table np_flags; | |
754 | unsigned char np_ip[IPV6_ADDRESS_SPACE]; | |
755 | u16 np_port; | |
756 | spinlock_t np_thread_lock; | |
757 | struct completion np_restart_comp; | |
758 | struct socket *np_socket; | |
759 | struct __kernel_sockaddr_storage np_sockaddr; | |
760 | struct task_struct *np_thread; | |
761 | struct timer_list np_login_timer; | |
762 | struct iscsi_portal_group *np_login_tpg; | |
763 | struct list_head np_list; | |
764 | } ____cacheline_aligned; | |
765 | ||
766 | struct iscsi_tpg_np { | |
767 | struct iscsi_np *tpg_np; | |
768 | struct iscsi_portal_group *tpg; | |
769 | struct iscsi_tpg_np *tpg_np_parent; | |
770 | struct list_head tpg_np_list; | |
771 | struct list_head tpg_np_child_list; | |
772 | struct list_head tpg_np_parent_list; | |
773 | struct se_tpg_np se_tpg_np; | |
774 | spinlock_t tpg_np_parent_lock; | |
775 | }; | |
776 | ||
777 | struct iscsi_portal_group { | |
778 | unsigned char tpg_chap_id; | |
779 | /* TPG State */ | |
780 | enum tpg_state_table tpg_state; | |
781 | /* Target Portal Group Tag */ | |
782 | u16 tpgt; | |
783 | /* Id assigned to target sessions */ | |
784 | u16 ntsih; | |
785 | /* Number of active sessions */ | |
786 | u32 nsessions; | |
787 | /* Number of Network Portals available for this TPG */ | |
788 | u32 num_tpg_nps; | |
789 | /* Per TPG LIO specific session ID. */ | |
790 | u32 sid; | |
791 | /* Spinlock for adding/removing Network Portals */ | |
792 | spinlock_t tpg_np_lock; | |
793 | spinlock_t tpg_state_lock; | |
794 | struct se_portal_group tpg_se_tpg; | |
795 | struct mutex tpg_access_lock; | |
796 | struct mutex np_login_lock; | |
797 | struct iscsi_tpg_attrib tpg_attrib; | |
798 | /* Pointer to default list of iSCSI parameters for TPG */ | |
799 | struct iscsi_param_list *param_list; | |
800 | struct iscsi_tiqn *tpg_tiqn; | |
801 | struct list_head tpg_gnp_list; | |
802 | struct list_head tpg_list; | |
803 | } ____cacheline_aligned; | |
804 | ||
805 | #define ISCSI_TPG_C(c) ((struct iscsi_portal_group *)(c)->tpg) | |
806 | #define ISCSI_TPG_LUN(c, l) ((iscsi_tpg_list_t *)(c)->tpg->tpg_lun_list_t[l]) | |
807 | #define ISCSI_TPG_S(s) ((struct iscsi_portal_group *)(s)->tpg) | |
808 | #define ISCSI_TPG_ATTRIB(t) (&(t)->tpg_attrib) | |
809 | #define SE_TPG(tpg) (&(tpg)->tpg_se_tpg) | |
810 | ||
811 | struct iscsi_wwn_stat_grps { | |
812 | struct config_group iscsi_stat_group; | |
813 | struct config_group iscsi_instance_group; | |
814 | struct config_group iscsi_sess_err_group; | |
815 | struct config_group iscsi_tgt_attr_group; | |
816 | struct config_group iscsi_login_stats_group; | |
817 | struct config_group iscsi_logout_stats_group; | |
818 | }; | |
819 | ||
820 | struct iscsi_tiqn { | |
821 | #define ISCSI_IQN_LEN 224 | |
822 | unsigned char tiqn[ISCSI_IQN_LEN]; | |
823 | enum tiqn_state_table tiqn_state; | |
824 | int tiqn_access_count; | |
825 | u32 tiqn_active_tpgs; | |
826 | u32 tiqn_ntpgs; | |
827 | u32 tiqn_num_tpg_nps; | |
828 | u32 tiqn_nsessions; | |
829 | struct list_head tiqn_list; | |
830 | struct list_head tiqn_tpg_list; | |
831 | spinlock_t tiqn_state_lock; | |
832 | spinlock_t tiqn_tpg_lock; | |
833 | struct se_wwn tiqn_wwn; | |
834 | struct iscsi_wwn_stat_grps tiqn_stat_grps; | |
835 | int tiqn_index; | |
836 | struct iscsi_sess_err_stats sess_err_stats; | |
837 | struct iscsi_login_stats login_stats; | |
838 | struct iscsi_logout_stats logout_stats; | |
839 | } ____cacheline_aligned; | |
840 | ||
841 | #define WWN_STAT_GRPS(tiqn) (&(tiqn)->tiqn_stat_grps) | |
842 | ||
843 | struct iscsit_global { | |
844 | /* In core shutdown */ | |
845 | u32 in_shutdown; | |
846 | u32 active_ts; | |
847 | /* Unique identifier used for the authentication daemon */ | |
848 | u32 auth_id; | |
849 | u32 inactive_ts; | |
850 | /* Thread Set bitmap count */ | |
851 | int ts_bitmap_count; | |
852 | /* Thread Set bitmap pointer */ | |
853 | unsigned long *ts_bitmap; | |
854 | /* Used for iSCSI discovery session authentication */ | |
855 | struct iscsi_node_acl discovery_acl; | |
856 | struct iscsi_portal_group *discovery_tpg; | |
857 | }; | |
858 | ||
859 | #endif /* ISCSI_TARGET_CORE_H */ |