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b2441318 | 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
e48354ce NB |
2 | #ifndef ISCSI_TARGET_CORE_H |
3 | #define ISCSI_TARGET_CORE_H | |
4 | ||
8dcf07be BVA |
5 | #include <linux/dma-direction.h> /* enum dma_data_direction */ |
6 | #include <linux/list.h> /* struct list_head */ | |
10e9cbb6 | 7 | #include <linux/sched.h> |
8dcf07be BVA |
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; | |
e48354ce | 14 | |
2999ee7f | 15 | #define ISCSIT_VERSION "v4.1.0" |
e48354ce NB |
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" | |
988e3a85 NB |
23 | #define ISCSIT_MIN_TAGS 16 |
24 | #define ISCSIT_EXTRA_TAGS 8 | |
837f6452 | 25 | #define ISCSIT_TCP_BACKLOG 256 |
073900bd NB |
26 | #define ISCSI_RX_THREAD_NAME "iscsi_trx" |
27 | #define ISCSI_TX_THREAD_NAME "iscsi_ttx" | |
df711553 | 28 | #define ISCSI_IQN_LEN 224 |
a6e0d179 | 29 | #define NA_AUTHENTICATION_INHERITED -1 |
e48354ce NB |
30 | |
31 | /* struct iscsi_node_attrib sanity values */ | |
32 | #define NA_DATAOUT_TIMEOUT 3 | |
33 | #define NA_DATAOUT_TIMEOUT_MAX 60 | |
34 | #define NA_DATAOUT_TIMEOUT_MIX 2 | |
35 | #define NA_DATAOUT_TIMEOUT_RETRIES 5 | |
36 | #define NA_DATAOUT_TIMEOUT_RETRIES_MAX 15 | |
37 | #define NA_DATAOUT_TIMEOUT_RETRIES_MIN 1 | |
cf0eb28d | 38 | #define NA_NOPIN_TIMEOUT 15 |
e48354ce NB |
39 | #define NA_NOPIN_TIMEOUT_MAX 60 |
40 | #define NA_NOPIN_TIMEOUT_MIN 3 | |
cf0eb28d | 41 | #define NA_NOPIN_RESPONSE_TIMEOUT 30 |
e48354ce NB |
42 | #define NA_NOPIN_RESPONSE_TIMEOUT_MAX 60 |
43 | #define NA_NOPIN_RESPONSE_TIMEOUT_MIN 3 | |
44 | #define NA_RANDOM_DATAIN_PDU_OFFSETS 0 | |
45 | #define NA_RANDOM_DATAIN_SEQ_OFFSETS 0 | |
46 | #define NA_RANDOM_R2T_OFFSETS 0 | |
e48354ce NB |
47 | |
48 | /* struct iscsi_tpg_attrib sanity values */ | |
49 | #define TA_AUTHENTICATION 1 | |
50 | #define TA_LOGIN_TIMEOUT 15 | |
51 | #define TA_LOGIN_TIMEOUT_MAX 30 | |
52 | #define TA_LOGIN_TIMEOUT_MIN 5 | |
e48354ce | 53 | #define TA_GENERATE_NODE_ACLS 0 |
38f7d6ed | 54 | #define TA_DEFAULT_CMDSN_DEPTH 64 |
e48354ce NB |
55 | #define TA_DEFAULT_CMDSN_DEPTH_MAX 512 |
56 | #define TA_DEFAULT_CMDSN_DEPTH_MIN 1 | |
57 | #define TA_CACHE_DYNAMIC_ACLS 0 | |
58 | /* Enabled by default in demo mode (generic_node_acls=1) */ | |
59 | #define TA_DEMO_MODE_WRITE_PROTECT 1 | |
60 | /* Disabled by default in production mode w/ explict ACLs */ | |
61 | #define TA_PROD_MODE_WRITE_PROTECT 0 | |
4c54b6cf | 62 | #define TA_DEMO_MODE_DISCOVERY 1 |
d1fa7a1d | 63 | #define TA_DEFAULT_ERL 0 |
e48354ce | 64 | #define TA_CACHE_CORE_NPS 0 |
5b168dcd SG |
65 | /* T10 protection information disabled by default */ |
66 | #define TA_DEFAULT_T10_PI 0 | |
901c04a3 | 67 | #define TA_DEFAULT_FABRIC_PROT_TYPE 0 |
a6415cdd DD |
68 | /* TPG status needs to be enabled to return sendtargets discovery endpoint info */ |
69 | #define TA_DEFAULT_TPG_ENABLED_SENDTARGETS 1 | |
138d351e NB |
70 | /* |
71 | * Used to control the sending of keys with optional to respond state bit, | |
72 | * as a workaround for non RFC compliant initiators,that do not propose, | |
73 | * nor respond to specific keys required for login to complete. | |
74 | * | |
75 | * See iscsi_check_proposer_for_optional_reply() for more details. | |
76 | */ | |
77 | #define TA_DEFAULT_LOGIN_KEYS_WORKAROUND 1 | |
c0427f15 CH |
78 | |
79 | #define ISCSI_IOV_DATA_BUFFER 5 | |
80 | ||
baa4d64b | 81 | enum iscsit_transport_type { |
e48354ce NB |
82 | ISCSI_TCP = 0, |
83 | ISCSI_SCTP_TCP = 1, | |
84 | ISCSI_SCTP_UDP = 2, | |
85 | ISCSI_IWARP_TCP = 3, | |
86 | ISCSI_IWARP_SCTP = 4, | |
87 | ISCSI_INFINIBAND = 5, | |
ff7199b0 | 88 | ISCSI_CXGBIT = 6, |
e48354ce NB |
89 | }; |
90 | ||
91 | /* RFC-3720 7.1.4 Standard Connection State Diagram for a Target */ | |
92 | enum target_conn_state_table { | |
93 | TARG_CONN_STATE_FREE = 0x1, | |
94 | TARG_CONN_STATE_XPT_UP = 0x3, | |
95 | TARG_CONN_STATE_IN_LOGIN = 0x4, | |
96 | TARG_CONN_STATE_LOGGED_IN = 0x5, | |
97 | TARG_CONN_STATE_IN_LOGOUT = 0x6, | |
98 | TARG_CONN_STATE_LOGOUT_REQUESTED = 0x7, | |
99 | TARG_CONN_STATE_CLEANUP_WAIT = 0x8, | |
100 | }; | |
101 | ||
102 | /* RFC-3720 7.3.2 Session State Diagram for a Target */ | |
103 | enum target_sess_state_table { | |
104 | TARG_SESS_STATE_FREE = 0x1, | |
105 | TARG_SESS_STATE_ACTIVE = 0x2, | |
106 | TARG_SESS_STATE_LOGGED_IN = 0x3, | |
107 | TARG_SESS_STATE_FAILED = 0x4, | |
108 | TARG_SESS_STATE_IN_CONTINUE = 0x5, | |
109 | }; | |
110 | ||
111 | /* struct iscsi_data_count->type */ | |
112 | enum data_count_type { | |
113 | ISCSI_RX_DATA = 1, | |
114 | ISCSI_TX_DATA = 2, | |
115 | }; | |
116 | ||
117 | /* struct iscsi_datain_req->dr_complete */ | |
118 | enum datain_req_comp_table { | |
119 | DATAIN_COMPLETE_NORMAL = 1, | |
120 | DATAIN_COMPLETE_WITHIN_COMMAND_RECOVERY = 2, | |
121 | DATAIN_COMPLETE_CONNECTION_RECOVERY = 3, | |
122 | }; | |
123 | ||
124 | /* struct iscsi_datain_req->recovery */ | |
125 | enum datain_req_rec_table { | |
126 | DATAIN_WITHIN_COMMAND_RECOVERY = 1, | |
127 | DATAIN_CONNECTION_RECOVERY = 2, | |
128 | }; | |
129 | ||
130 | /* struct iscsi_portal_group->state */ | |
131 | enum tpg_state_table { | |
132 | TPG_STATE_FREE = 0, | |
133 | TPG_STATE_ACTIVE = 1, | |
134 | TPG_STATE_INACTIVE = 2, | |
135 | TPG_STATE_COLD_RESET = 3, | |
136 | }; | |
137 | ||
138 | /* struct iscsi_tiqn->tiqn_state */ | |
139 | enum tiqn_state_table { | |
140 | TIQN_STATE_ACTIVE = 1, | |
141 | TIQN_STATE_SHUTDOWN = 2, | |
142 | }; | |
143 | ||
66cd9d4e | 144 | /* struct iscsit_cmd->cmd_flags */ |
e48354ce NB |
145 | enum cmd_flags_table { |
146 | ICF_GOT_LAST_DATAOUT = 0x00000001, | |
147 | ICF_GOT_DATACK_SNACK = 0x00000002, | |
148 | ICF_NON_IMMEDIATE_UNSOLICITED_DATA = 0x00000004, | |
149 | ICF_SENT_LAST_R2T = 0x00000008, | |
150 | ICF_WITHIN_COMMAND_RECOVERY = 0x00000010, | |
151 | ICF_CONTIG_MEMORY = 0x00000020, | |
152 | ICF_ATTACHED_TO_RQUEUE = 0x00000040, | |
153 | ICF_OOO_CMDSN = 0x00000080, | |
8060b8dd AG |
154 | ICF_SENDTARGETS_ALL = 0x00000100, |
155 | ICF_SENDTARGETS_SINGLE = 0x00000200, | |
e48354ce NB |
156 | }; |
157 | ||
66cd9d4e | 158 | /* struct iscsit_cmd->i_state */ |
e48354ce NB |
159 | enum cmd_i_state_table { |
160 | ISTATE_NO_STATE = 0, | |
161 | ISTATE_NEW_CMD = 1, | |
162 | ISTATE_DEFERRED_CMD = 2, | |
163 | ISTATE_UNSOLICITED_DATA = 3, | |
164 | ISTATE_RECEIVE_DATAOUT = 4, | |
165 | ISTATE_RECEIVE_DATAOUT_RECOVERY = 5, | |
166 | ISTATE_RECEIVED_LAST_DATAOUT = 6, | |
167 | ISTATE_WITHIN_DATAOUT_RECOVERY = 7, | |
168 | ISTATE_IN_CONNECTION_RECOVERY = 8, | |
169 | ISTATE_RECEIVED_TASKMGT = 9, | |
170 | ISTATE_SEND_ASYNCMSG = 10, | |
171 | ISTATE_SENT_ASYNCMSG = 11, | |
172 | ISTATE_SEND_DATAIN = 12, | |
173 | ISTATE_SEND_LAST_DATAIN = 13, | |
174 | ISTATE_SENT_LAST_DATAIN = 14, | |
175 | ISTATE_SEND_LOGOUTRSP = 15, | |
176 | ISTATE_SENT_LOGOUTRSP = 16, | |
177 | ISTATE_SEND_NOPIN = 17, | |
178 | ISTATE_SENT_NOPIN = 18, | |
179 | ISTATE_SEND_REJECT = 19, | |
180 | ISTATE_SENT_REJECT = 20, | |
181 | ISTATE_SEND_R2T = 21, | |
182 | ISTATE_SENT_R2T = 22, | |
183 | ISTATE_SEND_R2T_RECOVERY = 23, | |
184 | ISTATE_SENT_R2T_RECOVERY = 24, | |
185 | ISTATE_SEND_LAST_R2T = 25, | |
186 | ISTATE_SENT_LAST_R2T = 26, | |
187 | ISTATE_SEND_LAST_R2T_RECOVERY = 27, | |
188 | ISTATE_SENT_LAST_R2T_RECOVERY = 28, | |
189 | ISTATE_SEND_STATUS = 29, | |
190 | ISTATE_SEND_STATUS_BROKEN_PC = 30, | |
191 | ISTATE_SENT_STATUS = 31, | |
192 | ISTATE_SEND_STATUS_RECOVERY = 32, | |
193 | ISTATE_SENT_STATUS_RECOVERY = 33, | |
194 | ISTATE_SEND_TASKMGTRSP = 34, | |
195 | ISTATE_SENT_TASKMGTRSP = 35, | |
196 | ISTATE_SEND_TEXTRSP = 36, | |
197 | ISTATE_SENT_TEXTRSP = 37, | |
198 | ISTATE_SEND_NOPIN_WANT_RESPONSE = 38, | |
199 | ISTATE_SENT_NOPIN_WANT_RESPONSE = 39, | |
200 | ISTATE_SEND_NOPIN_NO_RESPONSE = 40, | |
201 | ISTATE_REMOVE = 41, | |
202 | ISTATE_FREE = 42, | |
203 | }; | |
204 | ||
205 | /* Used for iscsi_recover_cmdsn() return values */ | |
206 | enum recover_cmdsn_ret_table { | |
207 | CMDSN_ERROR_CANNOT_RECOVER = -1, | |
208 | CMDSN_NORMAL_OPERATION = 0, | |
209 | CMDSN_LOWER_THAN_EXP = 1, | |
210 | CMDSN_HIGHER_THAN_EXP = 2, | |
ea7e32be | 211 | CMDSN_MAXCMDSN_OVERRUN = 3, |
e48354ce NB |
212 | }; |
213 | ||
214 | /* Used for iscsi_handle_immediate_data() return values */ | |
215 | enum immedate_data_ret_table { | |
216 | IMMEDIATE_DATA_CANNOT_RECOVER = -1, | |
217 | IMMEDIATE_DATA_NORMAL_OPERATION = 0, | |
218 | IMMEDIATE_DATA_ERL1_CRC_FAILURE = 1, | |
219 | }; | |
220 | ||
221 | /* Used for iscsi_decide_dataout_action() return values */ | |
222 | enum dataout_action_ret_table { | |
223 | DATAOUT_CANNOT_RECOVER = -1, | |
224 | DATAOUT_NORMAL = 0, | |
225 | DATAOUT_SEND_R2T = 1, | |
226 | DATAOUT_SEND_TO_TRANSPORT = 2, | |
227 | DATAOUT_WITHIN_COMMAND_RECOVERY = 3, | |
228 | }; | |
229 | ||
230 | /* Used for struct iscsi_node_auth->naf_flags */ | |
231 | enum naf_flags_table { | |
232 | NAF_USERID_SET = 0x01, | |
233 | NAF_PASSWORD_SET = 0x02, | |
234 | NAF_USERID_IN_SET = 0x04, | |
235 | NAF_PASSWORD_IN_SET = 0x08, | |
236 | }; | |
237 | ||
238 | /* Used by various struct timer_list to manage iSCSI specific state */ | |
239 | enum iscsi_timer_flags_table { | |
240 | ISCSI_TF_RUNNING = 0x01, | |
241 | ISCSI_TF_STOP = 0x02, | |
242 | ISCSI_TF_EXPIRED = 0x04, | |
243 | }; | |
244 | ||
245 | /* Used for struct iscsi_np->np_flags */ | |
246 | enum np_flags_table { | |
247 | NPF_IP_NETWORK = 0x00, | |
e48354ce NB |
248 | }; |
249 | ||
250 | /* Used for struct iscsi_np->np_thread_state */ | |
251 | enum np_thread_state_table { | |
252 | ISCSI_NP_THREAD_ACTIVE = 1, | |
253 | ISCSI_NP_THREAD_INACTIVE = 2, | |
254 | ISCSI_NP_THREAD_RESET = 3, | |
255 | ISCSI_NP_THREAD_SHUTDOWN = 4, | |
256 | ISCSI_NP_THREAD_EXIT = 5, | |
257 | }; | |
258 | ||
259 | struct iscsi_conn_ops { | |
260 | u8 HeaderDigest; /* [0,1] == [None,CRC32C] */ | |
261 | u8 DataDigest; /* [0,1] == [None,CRC32C] */ | |
262 | u32 MaxRecvDataSegmentLength; /* [512..2**24-1] */ | |
e004cb25 | 263 | u32 MaxXmitDataSegmentLength; /* [512..2**24-1] */ |
03aa2070 NB |
264 | /* |
265 | * iSER specific connection parameters | |
266 | */ | |
267 | u32 InitiatorRecvDataSegmentLength; /* [512..2**24-1] */ | |
268 | u32 TargetRecvDataSegmentLength; /* [512..2**24-1] */ | |
e48354ce NB |
269 | }; |
270 | ||
271 | struct iscsi_sess_ops { | |
df711553 | 272 | char InitiatorName[ISCSI_IQN_LEN]; |
e48354ce | 273 | char InitiatorAlias[256]; |
df711553 | 274 | char TargetName[ISCSI_IQN_LEN]; |
e48354ce NB |
275 | char TargetAlias[256]; |
276 | char TargetAddress[256]; | |
277 | u16 TargetPortalGroupTag; /* [0..65535] */ | |
278 | u16 MaxConnections; /* [1..65535] */ | |
279 | u8 InitialR2T; /* [0,1] == [No,Yes] */ | |
280 | u8 ImmediateData; /* [0,1] == [No,Yes] */ | |
281 | u32 MaxBurstLength; /* [512..2**24-1] */ | |
282 | u32 FirstBurstLength; /* [512..2**24-1] */ | |
283 | u16 DefaultTime2Wait; /* [0..3600] */ | |
284 | u16 DefaultTime2Retain; /* [0..3600] */ | |
285 | u16 MaxOutstandingR2T; /* [1..65535] */ | |
286 | u8 DataPDUInOrder; /* [0,1] == [No,Yes] */ | |
287 | u8 DataSequenceInOrder; /* [0,1] == [No,Yes] */ | |
288 | u8 ErrorRecoveryLevel; /* [0..2] */ | |
289 | u8 SessionType; /* [0,1] == [Normal,Discovery]*/ | |
03aa2070 NB |
290 | /* |
291 | * iSER specific session parameters | |
292 | */ | |
293 | u8 RDMAExtensions; /* [0,1] == [No,Yes] */ | |
e48354ce NB |
294 | }; |
295 | ||
296 | struct iscsi_queue_req { | |
297 | int state; | |
66cd9d4e | 298 | struct iscsit_cmd *cmd; |
e48354ce NB |
299 | struct list_head qr_list; |
300 | }; | |
301 | ||
e48354ce | 302 | struct iscsi_param_list { |
03aa2070 | 303 | bool iser; |
e48354ce NB |
304 | struct list_head param_list; |
305 | struct list_head extra_response_list; | |
306 | }; | |
307 | ||
308 | struct iscsi_datain_req { | |
309 | enum datain_req_comp_table dr_complete; | |
310 | int generate_recovery_values; | |
311 | enum datain_req_rec_table recovery; | |
312 | u32 begrun; | |
313 | u32 runlength; | |
314 | u32 data_length; | |
315 | u32 data_offset; | |
e48354ce NB |
316 | u32 data_sn; |
317 | u32 next_burst_len; | |
318 | u32 read_data_done; | |
319 | u32 seq_send_order; | |
8b1e1244 | 320 | struct list_head cmd_datain_node; |
e48354ce NB |
321 | } ____cacheline_aligned; |
322 | ||
323 | struct iscsi_ooo_cmdsn { | |
324 | u16 cid; | |
325 | u32 batch_count; | |
326 | u32 cmdsn; | |
327 | u32 exp_cmdsn; | |
66cd9d4e | 328 | struct iscsit_cmd *cmd; |
e48354ce NB |
329 | struct list_head ooo_list; |
330 | } ____cacheline_aligned; | |
331 | ||
332 | struct iscsi_datain { | |
333 | u8 flags; | |
334 | u32 data_sn; | |
335 | u32 length; | |
336 | u32 offset; | |
337 | } ____cacheline_aligned; | |
338 | ||
339 | struct iscsi_r2t { | |
340 | int seq_complete; | |
341 | int recovery_r2t; | |
342 | int sent_r2t; | |
343 | u32 r2t_sn; | |
344 | u32 offset; | |
345 | u32 targ_xfer_tag; | |
346 | u32 xfer_len; | |
347 | struct list_head r2t_list; | |
348 | } ____cacheline_aligned; | |
349 | ||
66cd9d4e | 350 | struct iscsit_cmd { |
e48354ce NB |
351 | enum iscsi_timer_flags_table dataout_timer_flags; |
352 | /* DataOUT timeout retries */ | |
353 | u8 dataout_timeout_retries; | |
354 | /* Within command recovery count */ | |
355 | u8 error_recovery_count; | |
356 | /* iSCSI dependent state for out or order CmdSNs */ | |
357 | enum cmd_i_state_table deferred_i_state; | |
358 | /* iSCSI dependent state */ | |
359 | enum cmd_i_state_table i_state; | |
360 | /* Command is an immediate command (ISCSI_OP_IMMEDIATE set) */ | |
361 | u8 immediate_cmd; | |
362 | /* Immediate data present */ | |
363 | u8 immediate_data; | |
364 | /* iSCSI Opcode */ | |
365 | u8 iscsi_opcode; | |
366 | /* iSCSI Response Code */ | |
367 | u8 iscsi_response; | |
368 | /* Logout reason when iscsi_opcode == ISCSI_INIT_LOGOUT_CMND */ | |
369 | u8 logout_reason; | |
370 | /* Logout response code when iscsi_opcode == ISCSI_INIT_LOGOUT_CMND */ | |
371 | u8 logout_response; | |
372 | /* MaxCmdSN has been incremented */ | |
373 | u8 maxcmdsn_inc; | |
374 | /* Immediate Unsolicited Dataout */ | |
375 | u8 unsolicited_data; | |
ba159914 NB |
376 | /* Reject reason code */ |
377 | u8 reject_reason; | |
e48354ce NB |
378 | /* CID contained in logout PDU when opcode == ISCSI_INIT_LOGOUT_CMND */ |
379 | u16 logout_cid; | |
380 | /* Command flags */ | |
381 | enum cmd_flags_table cmd_flags; | |
382 | /* Initiator Task Tag assigned from Initiator */ | |
66c7db68 | 383 | itt_t init_task_tag; |
e48354ce NB |
384 | /* Target Transfer Tag assigned from Target */ |
385 | u32 targ_xfer_tag; | |
386 | /* CmdSN assigned from Initiator */ | |
387 | u32 cmd_sn; | |
388 | /* ExpStatSN assigned from Initiator */ | |
389 | u32 exp_stat_sn; | |
390 | /* StatSN assigned to this ITT */ | |
391 | u32 stat_sn; | |
392 | /* DataSN Counter */ | |
393 | u32 data_sn; | |
394 | /* R2TSN Counter */ | |
395 | u32 r2t_sn; | |
396 | /* Last DataSN acknowledged via DataAck SNACK */ | |
397 | u32 acked_data_sn; | |
398 | /* Used for echoing NOPOUT ping data */ | |
399 | u32 buf_ptr_size; | |
400 | /* Used to store DataDigest */ | |
401 | u32 data_crc; | |
e48354ce NB |
402 | /* Counter for MaxOutstandingR2T */ |
403 | u32 outstanding_r2ts; | |
404 | /* Next R2T Offset when DataSequenceInOrder=Yes */ | |
405 | u32 r2t_offset; | |
66cd9d4e | 406 | /* Iovec current and orig count for iscsit_cmd->iov_data */ |
e48354ce NB |
407 | u32 iov_data_count; |
408 | u32 orig_iov_data_count; | |
409 | /* Number of miscellaneous iovecs used for IP stack calls */ | |
410 | u32 iov_misc_count; | |
66cd9d4e | 411 | /* Number of struct iscsi_pdu in struct iscsit_cmd->pdu_list */ |
e48354ce | 412 | u32 pdu_count; |
66cd9d4e | 413 | /* Next struct iscsi_pdu to send in struct iscsit_cmd->pdu_list */ |
e48354ce | 414 | u32 pdu_send_order; |
66cd9d4e | 415 | /* Current struct iscsi_pdu in struct iscsit_cmd->pdu_list */ |
e48354ce | 416 | u32 pdu_start; |
66cd9d4e | 417 | /* Next struct iscsi_seq to send in struct iscsit_cmd->seq_list */ |
e48354ce | 418 | u32 seq_send_order; |
66cd9d4e | 419 | /* Number of struct iscsi_seq in struct iscsit_cmd->seq_list */ |
e48354ce | 420 | u32 seq_count; |
66cd9d4e | 421 | /* Current struct iscsi_seq in struct iscsit_cmd->seq_list */ |
e48354ce NB |
422 | u32 seq_no; |
423 | /* Lowest offset in current DataOUT sequence */ | |
424 | u32 seq_start_offset; | |
425 | /* Highest offset in current DataOUT sequence */ | |
426 | u32 seq_end_offset; | |
427 | /* Total size in bytes received so far of READ data */ | |
428 | u32 read_data_done; | |
429 | /* Total size in bytes received so far of WRITE data */ | |
430 | u32 write_data_done; | |
431 | /* Counter for FirstBurstLength key */ | |
432 | u32 first_burst_len; | |
433 | /* Counter for MaxBurstLength key */ | |
434 | u32 next_burst_len; | |
435 | /* Transfer size used for IP stack calls */ | |
436 | u32 tx_size; | |
437 | /* Buffer used for various purposes */ | |
438 | void *buf_ptr; | |
9864ca9d NB |
439 | /* Used by SendTargets=[iqn.,eui.] discovery */ |
440 | void *text_in_ptr; | |
e48354ce NB |
441 | /* See include/linux/dma-mapping.h */ |
442 | enum dma_data_direction data_direction; | |
443 | /* iSCSI PDU Header + CRC */ | |
444 | unsigned char pdu[ISCSI_HDR_LEN + ISCSI_CRC_LEN]; | |
66cd9d4e | 445 | /* Number of times struct iscsit_cmd is present in immediate queue */ |
e48354ce NB |
446 | atomic_t immed_queue_count; |
447 | atomic_t response_queue_count; | |
e48354ce NB |
448 | spinlock_t datain_lock; |
449 | spinlock_t dataout_timeout_lock; | |
66cd9d4e | 450 | /* spinlock for protecting struct iscsit_cmd->i_state */ |
e48354ce NB |
451 | spinlock_t istate_lock; |
452 | /* spinlock for adding within command recovery entries */ | |
453 | spinlock_t error_lock; | |
454 | /* spinlock for adding R2Ts */ | |
455 | spinlock_t r2t_lock; | |
456 | /* DataIN List */ | |
457 | struct list_head datain_list; | |
458 | /* R2T List */ | |
459 | struct list_head cmd_r2t_list; | |
e48354ce NB |
460 | /* Timer for DataOUT */ |
461 | struct timer_list dataout_timer; | |
462 | /* Iovecs for SCSI data payload RX/TX w/ kernel level sockets */ | |
463 | struct kvec *iov_data; | |
0ca650c1 | 464 | void *overflow_buf; |
e48354ce NB |
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 */ | |
be36d683 | 479 | struct iscsit_conn *conn; |
e48354ce NB |
480 | /* Pointer to connection recovery entry */ |
481 | struct iscsi_conn_recovery *cr; | |
482 | /* Session the command is part of, used for connection recovery */ | |
0873fe44 | 483 | struct iscsit_session *sess; |
e48354ce | 484 | /* list_head for connection list */ |
2fbb471e | 485 | struct list_head i_conn_node; |
e48354ce NB |
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 | ||
e48354ce NB |
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; | |
de103c93 | 498 | sense_reason_t sense_reason; |
e48354ce NB |
499 | } ____cacheline_aligned; |
500 | ||
501 | struct iscsi_tmr_req { | |
502 | bool task_reassign:1; | |
e48354ce | 503 | u32 exp_data_sn; |
66cd9d4e | 504 | struct iscsit_cmd *ref_cmd; |
e48354ce NB |
505 | struct iscsi_conn_recovery *conn_recovery; |
506 | struct se_tmr_req *se_tmr_req; | |
507 | }; | |
508 | ||
be36d683 | 509 | struct iscsit_conn { |
d5627acb | 510 | wait_queue_head_t queues_wq; |
e48354ce NB |
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; | |
e48354ce NB |
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; | |
baa4d64b | 526 | int login_family; |
e48354ce | 527 | u32 auth_id; |
e48354ce NB |
528 | u32 conn_flags; |
529 | /* Used for iscsi_tx_login_rsp() */ | |
66c7db68 | 530 | itt_t login_itt; |
e48354ce NB |
531 | u32 exp_statsn; |
532 | /* Per connection status sequence number */ | |
533 | u32 stat_sn; | |
13a3cf08 AG |
534 | struct sockaddr_storage login_sockaddr; |
535 | struct sockaddr_storage local_sockaddr; | |
e48354ce NB |
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; | |
e48354ce NB |
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; | |
676d2369 | 555 | void (*orig_data_ready)(struct sock *); |
bb048357 | 556 | void (*orig_state_change)(struct sock *); |
4e108d4f HP |
557 | #define LOGIN_FLAGS_READY 0 |
558 | #define LOGIN_FLAGS_INITIAL_PDU 1 | |
559 | #define LOGIN_FLAGS_READ_ACTIVE 2 | |
560 | #define LOGIN_FLAGS_WRITE_ACTIVE 3 | |
561 | #define LOGIN_FLAGS_CLOSED 4 | |
13247018 | 562 | #define LOGIN_FLAGS_WORKER_RUNNING 5 |
a91eb7d9 NB |
563 | unsigned long login_flags; |
564 | struct delayed_work login_work; | |
565 | struct iscsi_login *login; | |
e48354ce NB |
566 | struct timer_list nopin_timer; |
567 | struct timer_list nopin_response_timer; | |
13247018 | 568 | struct timer_list login_timer; |
d381a801 | 569 | struct task_struct *login_kworker; |
e48354ce NB |
570 | /* Spinlock used for add/deleting cmd's from conn_cmd_list */ |
571 | spinlock_t cmd_lock; | |
572 | spinlock_t conn_usage_lock; | |
573 | spinlock_t immed_queue_lock; | |
574 | spinlock_t nopin_timer_lock; | |
575 | spinlock_t response_queue_lock; | |
576 | spinlock_t state_lock; | |
13247018 ML |
577 | spinlock_t login_timer_lock; |
578 | spinlock_t login_worker_lock; | |
e48354ce | 579 | /* libcrypto RX and TX contexts for crc32c */ |
69110e3c HX |
580 | struct ahash_request *conn_rx_hash; |
581 | struct ahash_request *conn_tx_hash; | |
e48354ce NB |
582 | /* Used for scheduling TX and RX connection kthreads */ |
583 | cpumask_var_t conn_cpumask; | |
d72d827f | 584 | cpumask_var_t allowed_cpumask; |
f8d48ae5 DC |
585 | unsigned int conn_rx_reset_cpumask:1; |
586 | unsigned int conn_tx_reset_cpumask:1; | |
66cd9d4e | 587 | /* list_head of struct iscsit_cmd for this connection */ |
e48354ce NB |
588 | struct list_head conn_cmd_list; |
589 | struct list_head immed_queue_list; | |
590 | struct list_head response_queue_list; | |
591 | struct iscsi_conn_ops *conn_ops; | |
baa4d64b NB |
592 | struct iscsi_login *conn_login; |
593 | struct iscsit_transport *conn_transport; | |
e48354ce NB |
594 | struct iscsi_param_list *param_list; |
595 | /* Used for per connection auth state machine */ | |
596 | void *auth_protocol; | |
baa4d64b | 597 | void *context; |
e48354ce NB |
598 | struct iscsi_login_thread_s *login_thread; |
599 | struct iscsi_portal_group *tpg; | |
a91eb7d9 | 600 | struct iscsi_tpg_np *tpg_np; |
e48354ce | 601 | /* Pointer to parent session */ |
0873fe44 | 602 | struct iscsit_session *sess; |
becd9be6 | 603 | struct target_cmd_counter *cmd_cnt; |
88dcd2da NB |
604 | int bitmap_id; |
605 | int rx_thread_active; | |
606 | struct task_struct *rx_thread; | |
e5419865 | 607 | struct completion rx_login_comp; |
88dcd2da NB |
608 | int tx_thread_active; |
609 | struct task_struct *tx_thread; | |
e48354ce NB |
610 | /* list_head for session connection list */ |
611 | struct list_head conn_list; | |
612 | } ____cacheline_aligned; | |
613 | ||
614 | struct iscsi_conn_recovery { | |
615 | u16 cid; | |
616 | u32 cmd_count; | |
617 | u32 maxrecvdatasegmentlength; | |
1c417f39 | 618 | u32 maxxmitdatasegmentlength; |
e48354ce NB |
619 | int ready_for_reallegiance; |
620 | struct list_head conn_recovery_cmd_list; | |
621 | spinlock_t conn_recovery_cmd_lock; | |
622 | struct timer_list time2retain_timer; | |
0873fe44 | 623 | struct iscsit_session *sess; |
e48354ce NB |
624 | struct list_head cr_list; |
625 | } ____cacheline_aligned; | |
626 | ||
0873fe44 | 627 | struct iscsit_session { |
e48354ce NB |
628 | u8 initiator_vendor; |
629 | u8 isid[6]; | |
630 | enum iscsi_timer_flags_table time2retain_timer_flags; | |
631 | u8 version_active; | |
632 | u16 cid_called; | |
633 | u16 conn_recovery_count; | |
634 | u16 tsih; | |
635 | /* state session is currently in */ | |
636 | u32 session_state; | |
637 | /* session wide counter: initiator assigned task tag */ | |
66c7db68 | 638 | itt_t init_task_tag; |
e48354ce NB |
639 | /* session wide counter: target assigned task tag */ |
640 | u32 targ_xfer_tag; | |
641 | u32 cmdsn_window; | |
642 | ||
643 | /* protects cmdsn values */ | |
644 | struct mutex cmdsn_mutex; | |
645 | /* session wide counter: expected command sequence number */ | |
646 | u32 exp_cmd_sn; | |
647 | /* session wide counter: maximum allowed command sequence number */ | |
109e2381 | 648 | atomic_t max_cmd_sn; |
e48354ce NB |
649 | struct list_head sess_ooo_cmdsn_list; |
650 | ||
651 | /* LIO specific session ID */ | |
652 | u32 sid; | |
653 | char auth_type[8]; | |
654 | /* unique within the target */ | |
655 | int session_index; | |
656 | /* Used for session reference counting */ | |
657 | int session_usage_count; | |
658 | int session_waiting_on_uc; | |
04f3b31b NB |
659 | atomic_long_t cmd_pdus; |
660 | atomic_long_t rsp_pdus; | |
661 | atomic_long_t tx_data_octets; | |
662 | atomic_long_t rx_data_octets; | |
663 | atomic_long_t conn_digest_errors; | |
664 | atomic_long_t conn_timeout_errors; | |
e48354ce | 665 | u64 creation_time; |
e48354ce NB |
666 | /* Number of active connections */ |
667 | atomic_t nconn; | |
668 | atomic_t session_continuation; | |
669 | atomic_t session_fall_back_to_erl0; | |
670 | atomic_t session_logout; | |
671 | atomic_t session_reinstatement; | |
672 | atomic_t session_stop_active; | |
57c46e9f | 673 | atomic_t session_close; |
e48354ce NB |
674 | /* connection list */ |
675 | struct list_head sess_conn_list; | |
676 | struct list_head cr_active_list; | |
677 | struct list_head cr_inactive_list; | |
678 | spinlock_t conn_lock; | |
679 | spinlock_t cr_a_lock; | |
680 | spinlock_t cr_i_lock; | |
681 | spinlock_t session_usage_lock; | |
682 | spinlock_t ttt_lock; | |
683 | struct completion async_msg_comp; | |
684 | struct completion reinstatement_comp; | |
685 | struct completion session_wait_comp; | |
686 | struct completion session_waiting_on_uc_comp; | |
687 | struct timer_list time2retain_timer; | |
688 | struct iscsi_sess_ops *sess_ops; | |
689 | struct se_session *se_sess; | |
690 | struct iscsi_portal_group *tpg; | |
691 | } ____cacheline_aligned; | |
692 | ||
693 | struct iscsi_login { | |
694 | u8 auth_complete; | |
695 | u8 checked_for_existing; | |
696 | u8 current_stage; | |
697 | u8 leading_connection; | |
698 | u8 first_request; | |
699 | u8 version_min; | |
700 | u8 version_max; | |
baa4d64b NB |
701 | u8 login_complete; |
702 | u8 login_failed; | |
a91eb7d9 | 703 | bool zero_tsih; |
e48354ce NB |
704 | char isid[6]; |
705 | u32 cmd_sn; | |
66c7db68 | 706 | itt_t init_task_tag; |
e48354ce NB |
707 | u32 initial_exp_statsn; |
708 | u32 rsp_length; | |
709 | u16 cid; | |
710 | u16 tsih; | |
baa4d64b NB |
711 | char req[ISCSI_HDR_LEN]; |
712 | char rsp[ISCSI_HDR_LEN]; | |
e48354ce NB |
713 | char *req_buf; |
714 | char *rsp_buf; | |
be36d683 | 715 | struct iscsit_conn *conn; |
a91eb7d9 | 716 | struct iscsi_np *np; |
e48354ce NB |
717 | } ____cacheline_aligned; |
718 | ||
719 | struct iscsi_node_attrib { | |
a6e0d179 | 720 | s32 authentication; |
e48354ce NB |
721 | u32 dataout_timeout; |
722 | u32 dataout_timeout_retries; | |
723 | u32 default_erl; | |
724 | u32 nopin_timeout; | |
725 | u32 nopin_response_timeout; | |
726 | u32 random_datain_pdu_offsets; | |
727 | u32 random_datain_seq_offsets; | |
728 | u32 random_r2t_offsets; | |
729 | u32 tmr_cold_reset; | |
730 | u32 tmr_warm_reset; | |
731 | struct iscsi_node_acl *nacl; | |
732 | }; | |
733 | ||
734 | struct se_dev_entry_s; | |
735 | ||
736 | struct iscsi_node_auth { | |
737 | enum naf_flags_table naf_flags; | |
738 | int authenticate_target; | |
739 | /* Used for iscsit_global->discovery_auth, | |
740 | * set to zero (auth disabled) by default */ | |
741 | int enforce_discovery_auth; | |
742 | #define MAX_USER_LEN 256 | |
743 | #define MAX_PASS_LEN 256 | |
744 | char userid[MAX_USER_LEN]; | |
745 | char password[MAX_PASS_LEN]; | |
746 | char userid_mutual[MAX_USER_LEN]; | |
747 | char password_mutual[MAX_PASS_LEN]; | |
748 | }; | |
749 | ||
750 | #include "iscsi_target_stat.h" | |
751 | ||
752 | struct iscsi_node_stat_grps { | |
753 | struct config_group iscsi_sess_stats_group; | |
754 | struct config_group iscsi_conn_stats_group; | |
755 | }; | |
756 | ||
757 | struct iscsi_node_acl { | |
144bc4c2 | 758 | struct se_node_acl se_node_acl; |
e48354ce NB |
759 | struct iscsi_node_attrib node_attrib; |
760 | struct iscsi_node_auth node_auth; | |
761 | struct iscsi_node_stat_grps node_stat_grps; | |
e48354ce NB |
762 | }; |
763 | ||
a11b8069 DB |
764 | static inline struct iscsi_node_acl * |
765 | to_iscsi_nacl(struct se_node_acl *se_nacl) | |
766 | { | |
767 | return container_of(se_nacl, struct iscsi_node_acl, se_node_acl); | |
768 | } | |
769 | ||
e48354ce NB |
770 | struct iscsi_tpg_attrib { |
771 | u32 authentication; | |
772 | u32 login_timeout; | |
e48354ce NB |
773 | u32 generate_node_acls; |
774 | u32 cache_dynamic_acls; | |
775 | u32 default_cmdsn_depth; | |
776 | u32 demo_mode_write_protect; | |
777 | u32 prod_mode_write_protect; | |
4c54b6cf | 778 | u32 demo_mode_discovery; |
d1fa7a1d | 779 | u32 default_erl; |
5b168dcd | 780 | u8 t10_pi; |
901c04a3 | 781 | u32 fabric_prot_type; |
a6415cdd | 782 | u32 tpg_enabled_sendtargets; |
138d351e | 783 | u32 login_keys_workaround; |
e48354ce NB |
784 | struct iscsi_portal_group *tpg; |
785 | }; | |
786 | ||
787 | struct iscsi_np { | |
788 | int np_network_transport; | |
789 | int np_ip_proto; | |
790 | int np_sock_type; | |
791 | enum np_thread_state_table np_thread_state; | |
14f4b54f | 792 | bool enabled; |
978d13d6 | 793 | atomic_t np_reset_count; |
e48354ce NB |
794 | u32 np_exports; |
795 | enum np_flags_table np_flags; | |
e48354ce NB |
796 | spinlock_t np_thread_lock; |
797 | struct completion np_restart_comp; | |
798 | struct socket *np_socket; | |
13a3cf08 | 799 | struct sockaddr_storage np_sockaddr; |
e48354ce | 800 | struct task_struct *np_thread; |
baa4d64b NB |
801 | void *np_context; |
802 | struct iscsit_transport *np_transport; | |
e48354ce NB |
803 | struct list_head np_list; |
804 | } ____cacheline_aligned; | |
805 | ||
806 | struct iscsi_tpg_np { | |
807 | struct iscsi_np *tpg_np; | |
808 | struct iscsi_portal_group *tpg; | |
809 | struct iscsi_tpg_np *tpg_np_parent; | |
810 | struct list_head tpg_np_list; | |
811 | struct list_head tpg_np_child_list; | |
812 | struct list_head tpg_np_parent_list; | |
813 | struct se_tpg_np se_tpg_np; | |
814 | spinlock_t tpg_np_parent_lock; | |
a91eb7d9 NB |
815 | struct completion tpg_np_comp; |
816 | struct kref tpg_np_kref; | |
e48354ce NB |
817 | }; |
818 | ||
819 | struct iscsi_portal_group { | |
820 | unsigned char tpg_chap_id; | |
821 | /* TPG State */ | |
822 | enum tpg_state_table tpg_state; | |
823 | /* Target Portal Group Tag */ | |
824 | u16 tpgt; | |
825 | /* Id assigned to target sessions */ | |
826 | u16 ntsih; | |
827 | /* Number of active sessions */ | |
828 | u32 nsessions; | |
829 | /* Number of Network Portals available for this TPG */ | |
830 | u32 num_tpg_nps; | |
831 | /* Per TPG LIO specific session ID. */ | |
832 | u32 sid; | |
833 | /* Spinlock for adding/removing Network Portals */ | |
834 | spinlock_t tpg_np_lock; | |
835 | spinlock_t tpg_state_lock; | |
836 | struct se_portal_group tpg_se_tpg; | |
837 | struct mutex tpg_access_lock; | |
a91eb7d9 | 838 | struct semaphore np_login_sem; |
e48354ce | 839 | struct iscsi_tpg_attrib tpg_attrib; |
c3e51442 | 840 | struct iscsi_node_auth tpg_demo_auth; |
e48354ce NB |
841 | /* Pointer to default list of iSCSI parameters for TPG */ |
842 | struct iscsi_param_list *param_list; | |
843 | struct iscsi_tiqn *tpg_tiqn; | |
844 | struct list_head tpg_gnp_list; | |
845 | struct list_head tpg_list; | |
846 | } ____cacheline_aligned; | |
847 | ||
a11b8069 DB |
848 | static inline struct iscsi_portal_group * |
849 | to_iscsi_tpg(struct se_portal_group *se_tpg) | |
850 | { | |
851 | return container_of(se_tpg, struct iscsi_portal_group, tpg_se_tpg); | |
852 | } | |
853 | ||
e48354ce NB |
854 | struct iscsi_wwn_stat_grps { |
855 | struct config_group iscsi_stat_group; | |
856 | struct config_group iscsi_instance_group; | |
857 | struct config_group iscsi_sess_err_group; | |
858 | struct config_group iscsi_tgt_attr_group; | |
859 | struct config_group iscsi_login_stats_group; | |
860 | struct config_group iscsi_logout_stats_group; | |
861 | }; | |
862 | ||
863 | struct iscsi_tiqn { | |
e48354ce NB |
864 | unsigned char tiqn[ISCSI_IQN_LEN]; |
865 | enum tiqn_state_table tiqn_state; | |
866 | int tiqn_access_count; | |
867 | u32 tiqn_active_tpgs; | |
868 | u32 tiqn_ntpgs; | |
869 | u32 tiqn_num_tpg_nps; | |
870 | u32 tiqn_nsessions; | |
871 | struct list_head tiqn_list; | |
872 | struct list_head tiqn_tpg_list; | |
873 | spinlock_t tiqn_state_lock; | |
874 | spinlock_t tiqn_tpg_lock; | |
875 | struct se_wwn tiqn_wwn; | |
876 | struct iscsi_wwn_stat_grps tiqn_stat_grps; | |
877 | int tiqn_index; | |
878 | struct iscsi_sess_err_stats sess_err_stats; | |
879 | struct iscsi_login_stats login_stats; | |
880 | struct iscsi_logout_stats logout_stats; | |
881 | } ____cacheline_aligned; | |
882 | ||
e48354ce NB |
883 | struct iscsit_global { |
884 | /* In core shutdown */ | |
885 | u32 in_shutdown; | |
886 | u32 active_ts; | |
887 | /* Unique identifier used for the authentication daemon */ | |
888 | u32 auth_id; | |
889 | u32 inactive_ts; | |
88dcd2da | 890 | #define ISCSIT_BITMAP_BITS 262144 |
e48354ce NB |
891 | /* Thread Set bitmap pointer */ |
892 | unsigned long *ts_bitmap; | |
88dcd2da | 893 | spinlock_t ts_bitmap_lock; |
d72d827f | 894 | cpumask_var_t allowed_cpumask; |
e48354ce NB |
895 | /* Used for iSCSI discovery session authentication */ |
896 | struct iscsi_node_acl discovery_acl; | |
897 | struct iscsi_portal_group *discovery_tpg; | |
898 | }; | |
899 | ||
0873fe44 | 900 | static inline u32 session_get_next_ttt(struct iscsit_session *session) |
c1e34b64 SG |
901 | { |
902 | u32 ttt; | |
903 | ||
904 | spin_lock_bh(&session->ttt_lock); | |
905 | ttt = session->targ_xfer_tag++; | |
906 | if (ttt == 0xFFFFFFFF) | |
907 | ttt = session->targ_xfer_tag++; | |
908 | spin_unlock_bh(&session->ttt_lock); | |
909 | ||
910 | return ttt; | |
911 | } | |
912 | ||
be36d683 | 913 | extern struct iscsit_cmd *iscsit_find_cmd_from_itt(struct iscsit_conn *, itt_t); |
c0b7373b | 914 | |
be36d683 | 915 | extern void iscsit_thread_check_cpumask(struct iscsit_conn *conn, |
d72d827f MZ |
916 | struct task_struct *p, |
917 | int mode); | |
918 | ||
e48354ce | 919 | #endif /* ISCSI_TARGET_CORE_H */ |