Root/
1 | /* |
2 | * RFC 3720 (iSCSI) protocol data types |
3 | * |
4 | * Copyright (C) 2005 Dmitry Yusupov |
5 | * Copyright (C) 2005 Alex Aizman |
6 | * maintained by open-iscsi@googlegroups.com |
7 | * |
8 | * This program is free software; you can redistribute it and/or modify |
9 | * it under the terms of the GNU General Public License as published |
10 | * by the Free Software Foundation; either version 2 of the License, or |
11 | * (at your option) any later version. |
12 | * |
13 | * This program is distributed in the hope that it will be useful, but |
14 | * WITHOUT ANY WARRANTY; without even the implied warranty of |
15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
16 | * General Public License for more details. |
17 | * |
18 | * See the file COPYING included with this distribution for more details. |
19 | */ |
20 | |
21 | #ifndef ISCSI_PROTO_H |
22 | #define ISCSI_PROTO_H |
23 | |
24 | #include <linux/types.h> |
25 | #include <scsi/scsi.h> |
26 | |
27 | #define ISCSI_DRAFT20_VERSION 0x00 |
28 | |
29 | /* default iSCSI listen port for incoming connections */ |
30 | #define ISCSI_LISTEN_PORT 3260 |
31 | |
32 | /* Padding word length */ |
33 | #define ISCSI_PAD_LEN 4 |
34 | |
35 | /* |
36 | * useful common(control and data pathes) macro |
37 | */ |
38 | #define ntoh24(p) (((p)[0] << 16) | ((p)[1] << 8) | ((p)[2])) |
39 | #define hton24(p, v) { \ |
40 | p[0] = (((v) >> 16) & 0xFF); \ |
41 | p[1] = (((v) >> 8) & 0xFF); \ |
42 | p[2] = ((v) & 0xFF); \ |
43 | } |
44 | #define zero_data(p) {p[0]=0;p[1]=0;p[2]=0;} |
45 | |
46 | /* initiator tags; opaque for target */ |
47 | typedef uint32_t __bitwise__ itt_t; |
48 | /* below makes sense only for initiator that created this tag */ |
49 | #define build_itt(itt, age) ((__force itt_t)\ |
50 | ((itt) | ((age) << ISCSI_AGE_SHIFT))) |
51 | #define get_itt(itt) ((__force uint32_t)(itt_t)(itt) & ISCSI_ITT_MASK) |
52 | #define RESERVED_ITT ((__force itt_t)0xffffffff) |
53 | |
54 | /* |
55 | * iSCSI Template Message Header |
56 | */ |
57 | struct iscsi_hdr { |
58 | uint8_t opcode; |
59 | uint8_t flags; /* Final bit */ |
60 | uint8_t rsvd2[2]; |
61 | uint8_t hlength; /* AHSs total length */ |
62 | uint8_t dlength[3]; /* Data length */ |
63 | uint8_t lun[8]; |
64 | itt_t itt; /* Initiator Task Tag, opaque for target */ |
65 | __be32 ttt; /* Target Task Tag */ |
66 | __be32 statsn; |
67 | __be32 exp_statsn; |
68 | __be32 max_statsn; |
69 | uint8_t other[12]; |
70 | }; |
71 | |
72 | /************************* RFC 3720 Begin *****************************/ |
73 | |
74 | #define ISCSI_RESERVED_TAG 0xffffffff |
75 | |
76 | /* Opcode encoding bits */ |
77 | #define ISCSI_OP_RETRY 0x80 |
78 | #define ISCSI_OP_IMMEDIATE 0x40 |
79 | #define ISCSI_OPCODE_MASK 0x3F |
80 | |
81 | /* Initiator Opcode values */ |
82 | #define ISCSI_OP_NOOP_OUT 0x00 |
83 | #define ISCSI_OP_SCSI_CMD 0x01 |
84 | #define ISCSI_OP_SCSI_TMFUNC 0x02 |
85 | #define ISCSI_OP_LOGIN 0x03 |
86 | #define ISCSI_OP_TEXT 0x04 |
87 | #define ISCSI_OP_SCSI_DATA_OUT 0x05 |
88 | #define ISCSI_OP_LOGOUT 0x06 |
89 | #define ISCSI_OP_SNACK 0x10 |
90 | |
91 | #define ISCSI_OP_VENDOR1_CMD 0x1c |
92 | #define ISCSI_OP_VENDOR2_CMD 0x1d |
93 | #define ISCSI_OP_VENDOR3_CMD 0x1e |
94 | #define ISCSI_OP_VENDOR4_CMD 0x1f |
95 | |
96 | /* Target Opcode values */ |
97 | #define ISCSI_OP_NOOP_IN 0x20 |
98 | #define ISCSI_OP_SCSI_CMD_RSP 0x21 |
99 | #define ISCSI_OP_SCSI_TMFUNC_RSP 0x22 |
100 | #define ISCSI_OP_LOGIN_RSP 0x23 |
101 | #define ISCSI_OP_TEXT_RSP 0x24 |
102 | #define ISCSI_OP_SCSI_DATA_IN 0x25 |
103 | #define ISCSI_OP_LOGOUT_RSP 0x26 |
104 | #define ISCSI_OP_R2T 0x31 |
105 | #define ISCSI_OP_ASYNC_EVENT 0x32 |
106 | #define ISCSI_OP_REJECT 0x3f |
107 | |
108 | struct iscsi_ahs_hdr { |
109 | __be16 ahslength; |
110 | uint8_t ahstype; |
111 | uint8_t ahspec[5]; |
112 | }; |
113 | |
114 | #define ISCSI_AHSTYPE_CDB 1 |
115 | #define ISCSI_AHSTYPE_RLENGTH 2 |
116 | #define ISCSI_CDB_SIZE 16 |
117 | |
118 | /* iSCSI PDU Header */ |
119 | struct iscsi_cmd { |
120 | uint8_t opcode; |
121 | uint8_t flags; |
122 | __be16 rsvd2; |
123 | uint8_t hlength; |
124 | uint8_t dlength[3]; |
125 | uint8_t lun[8]; |
126 | itt_t itt; /* Initiator Task Tag */ |
127 | __be32 data_length; |
128 | __be32 cmdsn; |
129 | __be32 exp_statsn; |
130 | uint8_t cdb[ISCSI_CDB_SIZE]; /* SCSI Command Block */ |
131 | /* Additional Data (Command Dependent) */ |
132 | }; |
133 | |
134 | /* Command PDU flags */ |
135 | #define ISCSI_FLAG_CMD_FINAL 0x80 |
136 | #define ISCSI_FLAG_CMD_READ 0x40 |
137 | #define ISCSI_FLAG_CMD_WRITE 0x20 |
138 | #define ISCSI_FLAG_CMD_ATTR_MASK 0x07 /* 3 bits */ |
139 | |
140 | /* SCSI Command Attribute values */ |
141 | #define ISCSI_ATTR_UNTAGGED 0 |
142 | #define ISCSI_ATTR_SIMPLE 1 |
143 | #define ISCSI_ATTR_ORDERED 2 |
144 | #define ISCSI_ATTR_HEAD_OF_QUEUE 3 |
145 | #define ISCSI_ATTR_ACA 4 |
146 | |
147 | struct iscsi_rlength_ahdr { |
148 | __be16 ahslength; |
149 | uint8_t ahstype; |
150 | uint8_t reserved; |
151 | __be32 read_length; |
152 | }; |
153 | |
154 | /* Extended CDB AHS */ |
155 | struct iscsi_ecdb_ahdr { |
156 | __be16 ahslength; /* CDB length - 15, including reserved byte */ |
157 | uint8_t ahstype; |
158 | uint8_t reserved; |
159 | /* 4-byte aligned extended CDB spillover */ |
160 | uint8_t ecdb[SCSI_MAX_VARLEN_CDB_SIZE - ISCSI_CDB_SIZE]; |
161 | }; |
162 | |
163 | /* SCSI Response Header */ |
164 | struct iscsi_cmd_rsp { |
165 | uint8_t opcode; |
166 | uint8_t flags; |
167 | uint8_t response; |
168 | uint8_t cmd_status; |
169 | uint8_t hlength; |
170 | uint8_t dlength[3]; |
171 | uint8_t rsvd[8]; |
172 | itt_t itt; /* Initiator Task Tag */ |
173 | __be32 rsvd1; |
174 | __be32 statsn; |
175 | __be32 exp_cmdsn; |
176 | __be32 max_cmdsn; |
177 | __be32 exp_datasn; |
178 | __be32 bi_residual_count; |
179 | __be32 residual_count; |
180 | /* Response or Sense Data (optional) */ |
181 | }; |
182 | |
183 | /* Command Response PDU flags */ |
184 | #define ISCSI_FLAG_CMD_BIDI_OVERFLOW 0x10 |
185 | #define ISCSI_FLAG_CMD_BIDI_UNDERFLOW 0x08 |
186 | #define ISCSI_FLAG_CMD_OVERFLOW 0x04 |
187 | #define ISCSI_FLAG_CMD_UNDERFLOW 0x02 |
188 | |
189 | /* iSCSI Status values. Valid if Rsp Selector bit is not set */ |
190 | #define ISCSI_STATUS_CMD_COMPLETED 0 |
191 | #define ISCSI_STATUS_TARGET_FAILURE 1 |
192 | #define ISCSI_STATUS_SUBSYS_FAILURE 2 |
193 | |
194 | /* Asynchronous Event Header */ |
195 | struct iscsi_async { |
196 | uint8_t opcode; |
197 | uint8_t flags; |
198 | uint8_t rsvd2[2]; |
199 | uint8_t rsvd3; |
200 | uint8_t dlength[3]; |
201 | uint8_t lun[8]; |
202 | uint8_t rsvd4[8]; |
203 | __be32 statsn; |
204 | __be32 exp_cmdsn; |
205 | __be32 max_cmdsn; |
206 | uint8_t async_event; |
207 | uint8_t async_vcode; |
208 | __be16 param1; |
209 | __be16 param2; |
210 | __be16 param3; |
211 | uint8_t rsvd5[4]; |
212 | }; |
213 | |
214 | /* iSCSI Event Codes */ |
215 | #define ISCSI_ASYNC_MSG_SCSI_EVENT 0 |
216 | #define ISCSI_ASYNC_MSG_REQUEST_LOGOUT 1 |
217 | #define ISCSI_ASYNC_MSG_DROPPING_CONNECTION 2 |
218 | #define ISCSI_ASYNC_MSG_DROPPING_ALL_CONNECTIONS 3 |
219 | #define ISCSI_ASYNC_MSG_PARAM_NEGOTIATION 4 |
220 | #define ISCSI_ASYNC_MSG_VENDOR_SPECIFIC 255 |
221 | |
222 | /* NOP-Out Message */ |
223 | struct iscsi_nopout { |
224 | uint8_t opcode; |
225 | uint8_t flags; |
226 | __be16 rsvd2; |
227 | uint8_t rsvd3; |
228 | uint8_t dlength[3]; |
229 | uint8_t lun[8]; |
230 | itt_t itt; /* Initiator Task Tag */ |
231 | __be32 ttt; /* Target Transfer Tag */ |
232 | __be32 cmdsn; |
233 | __be32 exp_statsn; |
234 | uint8_t rsvd4[16]; |
235 | }; |
236 | |
237 | /* NOP-In Message */ |
238 | struct iscsi_nopin { |
239 | uint8_t opcode; |
240 | uint8_t flags; |
241 | __be16 rsvd2; |
242 | uint8_t rsvd3; |
243 | uint8_t dlength[3]; |
244 | uint8_t lun[8]; |
245 | itt_t itt; /* Initiator Task Tag */ |
246 | __be32 ttt; /* Target Transfer Tag */ |
247 | __be32 statsn; |
248 | __be32 exp_cmdsn; |
249 | __be32 max_cmdsn; |
250 | uint8_t rsvd4[12]; |
251 | }; |
252 | |
253 | /* SCSI Task Management Message Header */ |
254 | struct iscsi_tm { |
255 | uint8_t opcode; |
256 | uint8_t flags; |
257 | uint8_t rsvd1[2]; |
258 | uint8_t hlength; |
259 | uint8_t dlength[3]; |
260 | uint8_t lun[8]; |
261 | itt_t itt; /* Initiator Task Tag */ |
262 | itt_t rtt; /* Reference Task Tag */ |
263 | __be32 cmdsn; |
264 | __be32 exp_statsn; |
265 | __be32 refcmdsn; |
266 | __be32 exp_datasn; |
267 | uint8_t rsvd2[8]; |
268 | }; |
269 | |
270 | #define ISCSI_FLAG_TM_FUNC_MASK 0x7F |
271 | |
272 | /* Function values */ |
273 | #define ISCSI_TM_FUNC_ABORT_TASK 1 |
274 | #define ISCSI_TM_FUNC_ABORT_TASK_SET 2 |
275 | #define ISCSI_TM_FUNC_CLEAR_ACA 3 |
276 | #define ISCSI_TM_FUNC_CLEAR_TASK_SET 4 |
277 | #define ISCSI_TM_FUNC_LOGICAL_UNIT_RESET 5 |
278 | #define ISCSI_TM_FUNC_TARGET_WARM_RESET 6 |
279 | #define ISCSI_TM_FUNC_TARGET_COLD_RESET 7 |
280 | #define ISCSI_TM_FUNC_TASK_REASSIGN 8 |
281 | |
282 | #define ISCSI_TM_FUNC_VALUE(hdr) ((hdr)->flags & ISCSI_FLAG_TM_FUNC_MASK) |
283 | |
284 | /* SCSI Task Management Response Header */ |
285 | struct iscsi_tm_rsp { |
286 | uint8_t opcode; |
287 | uint8_t flags; |
288 | uint8_t response; /* see Response values below */ |
289 | uint8_t qualifier; |
290 | uint8_t hlength; |
291 | uint8_t dlength[3]; |
292 | uint8_t rsvd2[8]; |
293 | itt_t itt; /* Initiator Task Tag */ |
294 | itt_t rtt; /* Reference Task Tag */ |
295 | __be32 statsn; |
296 | __be32 exp_cmdsn; |
297 | __be32 max_cmdsn; |
298 | uint8_t rsvd3[12]; |
299 | }; |
300 | |
301 | /* Response values */ |
302 | #define ISCSI_TMF_RSP_COMPLETE 0x00 |
303 | #define ISCSI_TMF_RSP_NO_TASK 0x01 |
304 | #define ISCSI_TMF_RSP_NO_LUN 0x02 |
305 | #define ISCSI_TMF_RSP_TASK_ALLEGIANT 0x03 |
306 | #define ISCSI_TMF_RSP_NO_FAILOVER 0x04 |
307 | #define ISCSI_TMF_RSP_NOT_SUPPORTED 0x05 |
308 | #define ISCSI_TMF_RSP_AUTH_FAILED 0x06 |
309 | #define ISCSI_TMF_RSP_REJECTED 0xff |
310 | |
311 | /* Ready To Transfer Header */ |
312 | struct iscsi_r2t_rsp { |
313 | uint8_t opcode; |
314 | uint8_t flags; |
315 | uint8_t rsvd2[2]; |
316 | uint8_t hlength; |
317 | uint8_t dlength[3]; |
318 | uint8_t lun[8]; |
319 | itt_t itt; /* Initiator Task Tag */ |
320 | __be32 ttt; /* Target Transfer Tag */ |
321 | __be32 statsn; |
322 | __be32 exp_cmdsn; |
323 | __be32 max_cmdsn; |
324 | __be32 r2tsn; |
325 | __be32 data_offset; |
326 | __be32 data_length; |
327 | }; |
328 | |
329 | /* SCSI Data Hdr */ |
330 | struct iscsi_data { |
331 | uint8_t opcode; |
332 | uint8_t flags; |
333 | uint8_t rsvd2[2]; |
334 | uint8_t rsvd3; |
335 | uint8_t dlength[3]; |
336 | uint8_t lun[8]; |
337 | itt_t itt; |
338 | __be32 ttt; |
339 | __be32 rsvd4; |
340 | __be32 exp_statsn; |
341 | __be32 rsvd5; |
342 | __be32 datasn; |
343 | __be32 offset; |
344 | __be32 rsvd6; |
345 | /* Payload */ |
346 | }; |
347 | |
348 | /* SCSI Data Response Hdr */ |
349 | struct iscsi_data_rsp { |
350 | uint8_t opcode; |
351 | uint8_t flags; |
352 | uint8_t rsvd2; |
353 | uint8_t cmd_status; |
354 | uint8_t hlength; |
355 | uint8_t dlength[3]; |
356 | uint8_t lun[8]; |
357 | itt_t itt; |
358 | __be32 ttt; |
359 | __be32 statsn; |
360 | __be32 exp_cmdsn; |
361 | __be32 max_cmdsn; |
362 | __be32 datasn; |
363 | __be32 offset; |
364 | __be32 residual_count; |
365 | }; |
366 | |
367 | /* Data Response PDU flags */ |
368 | #define ISCSI_FLAG_DATA_ACK 0x40 |
369 | #define ISCSI_FLAG_DATA_OVERFLOW 0x04 |
370 | #define ISCSI_FLAG_DATA_UNDERFLOW 0x02 |
371 | #define ISCSI_FLAG_DATA_STATUS 0x01 |
372 | |
373 | /* Text Header */ |
374 | struct iscsi_text { |
375 | uint8_t opcode; |
376 | uint8_t flags; |
377 | uint8_t rsvd2[2]; |
378 | uint8_t hlength; |
379 | uint8_t dlength[3]; |
380 | uint8_t rsvd4[8]; |
381 | itt_t itt; |
382 | __be32 ttt; |
383 | __be32 cmdsn; |
384 | __be32 exp_statsn; |
385 | uint8_t rsvd5[16]; |
386 | /* Text - key=value pairs */ |
387 | }; |
388 | |
389 | #define ISCSI_FLAG_TEXT_CONTINUE 0x40 |
390 | |
391 | /* Text Response Header */ |
392 | struct iscsi_text_rsp { |
393 | uint8_t opcode; |
394 | uint8_t flags; |
395 | uint8_t rsvd2[2]; |
396 | uint8_t hlength; |
397 | uint8_t dlength[3]; |
398 | uint8_t rsvd4[8]; |
399 | itt_t itt; |
400 | __be32 ttt; |
401 | __be32 statsn; |
402 | __be32 exp_cmdsn; |
403 | __be32 max_cmdsn; |
404 | uint8_t rsvd5[12]; |
405 | /* Text Response - key:value pairs */ |
406 | }; |
407 | |
408 | /* Login Header */ |
409 | struct iscsi_login { |
410 | uint8_t opcode; |
411 | uint8_t flags; |
412 | uint8_t max_version; /* Max. version supported */ |
413 | uint8_t min_version; /* Min. version supported */ |
414 | uint8_t hlength; |
415 | uint8_t dlength[3]; |
416 | uint8_t isid[6]; /* Initiator Session ID */ |
417 | __be16 tsih; /* Target Session Handle */ |
418 | itt_t itt; /* Initiator Task Tag */ |
419 | __be16 cid; |
420 | __be16 rsvd3; |
421 | __be32 cmdsn; |
422 | __be32 exp_statsn; |
423 | uint8_t rsvd5[16]; |
424 | }; |
425 | |
426 | /* Login PDU flags */ |
427 | #define ISCSI_FLAG_LOGIN_TRANSIT 0x80 |
428 | #define ISCSI_FLAG_LOGIN_CONTINUE 0x40 |
429 | #define ISCSI_FLAG_LOGIN_CURRENT_STAGE_MASK 0x0C /* 2 bits */ |
430 | #define ISCSI_FLAG_LOGIN_NEXT_STAGE_MASK 0x03 /* 2 bits */ |
431 | |
432 | #define ISCSI_LOGIN_CURRENT_STAGE(flags) \ |
433 | ((flags & ISCSI_FLAG_LOGIN_CURRENT_STAGE_MASK) >> 2) |
434 | #define ISCSI_LOGIN_NEXT_STAGE(flags) \ |
435 | (flags & ISCSI_FLAG_LOGIN_NEXT_STAGE_MASK) |
436 | |
437 | /* Login Response Header */ |
438 | struct iscsi_login_rsp { |
439 | uint8_t opcode; |
440 | uint8_t flags; |
441 | uint8_t max_version; /* Max. version supported */ |
442 | uint8_t active_version; /* Active version */ |
443 | uint8_t hlength; |
444 | uint8_t dlength[3]; |
445 | uint8_t isid[6]; /* Initiator Session ID */ |
446 | __be16 tsih; /* Target Session Handle */ |
447 | itt_t itt; /* Initiator Task Tag */ |
448 | __be32 rsvd3; |
449 | __be32 statsn; |
450 | __be32 exp_cmdsn; |
451 | __be32 max_cmdsn; |
452 | uint8_t status_class; /* see Login RSP ststus classes below */ |
453 | uint8_t status_detail; /* see Login RSP Status details below */ |
454 | uint8_t rsvd4[10]; |
455 | }; |
456 | |
457 | /* Login stage (phase) codes for CSG, NSG */ |
458 | #define ISCSI_INITIAL_LOGIN_STAGE -1 |
459 | #define ISCSI_SECURITY_NEGOTIATION_STAGE 0 |
460 | #define ISCSI_OP_PARMS_NEGOTIATION_STAGE 1 |
461 | #define ISCSI_FULL_FEATURE_PHASE 3 |
462 | |
463 | /* Login Status response classes */ |
464 | #define ISCSI_STATUS_CLS_SUCCESS 0x00 |
465 | #define ISCSI_STATUS_CLS_REDIRECT 0x01 |
466 | #define ISCSI_STATUS_CLS_INITIATOR_ERR 0x02 |
467 | #define ISCSI_STATUS_CLS_TARGET_ERR 0x03 |
468 | |
469 | /* Login Status response detail codes */ |
470 | /* Class-0 (Success) */ |
471 | #define ISCSI_LOGIN_STATUS_ACCEPT 0x00 |
472 | |
473 | /* Class-1 (Redirection) */ |
474 | #define ISCSI_LOGIN_STATUS_TGT_MOVED_TEMP 0x01 |
475 | #define ISCSI_LOGIN_STATUS_TGT_MOVED_PERM 0x02 |
476 | |
477 | /* Class-2 (Initiator Error) */ |
478 | #define ISCSI_LOGIN_STATUS_INIT_ERR 0x00 |
479 | #define ISCSI_LOGIN_STATUS_AUTH_FAILED 0x01 |
480 | #define ISCSI_LOGIN_STATUS_TGT_FORBIDDEN 0x02 |
481 | #define ISCSI_LOGIN_STATUS_TGT_NOT_FOUND 0x03 |
482 | #define ISCSI_LOGIN_STATUS_TGT_REMOVED 0x04 |
483 | #define ISCSI_LOGIN_STATUS_NO_VERSION 0x05 |
484 | #define ISCSI_LOGIN_STATUS_ISID_ERROR 0x06 |
485 | #define ISCSI_LOGIN_STATUS_MISSING_FIELDS 0x07 |
486 | #define ISCSI_LOGIN_STATUS_CONN_ADD_FAILED 0x08 |
487 | #define ISCSI_LOGIN_STATUS_NO_SESSION_TYPE 0x09 |
488 | #define ISCSI_LOGIN_STATUS_NO_SESSION 0x0a |
489 | #define ISCSI_LOGIN_STATUS_INVALID_REQUEST 0x0b |
490 | |
491 | /* Class-3 (Target Error) */ |
492 | #define ISCSI_LOGIN_STATUS_TARGET_ERROR 0x00 |
493 | #define ISCSI_LOGIN_STATUS_SVC_UNAVAILABLE 0x01 |
494 | #define ISCSI_LOGIN_STATUS_NO_RESOURCES 0x02 |
495 | |
496 | /* Logout Header */ |
497 | struct iscsi_logout { |
498 | uint8_t opcode; |
499 | uint8_t flags; |
500 | uint8_t rsvd1[2]; |
501 | uint8_t hlength; |
502 | uint8_t dlength[3]; |
503 | uint8_t rsvd2[8]; |
504 | itt_t itt; /* Initiator Task Tag */ |
505 | __be16 cid; |
506 | uint8_t rsvd3[2]; |
507 | __be32 cmdsn; |
508 | __be32 exp_statsn; |
509 | uint8_t rsvd4[16]; |
510 | }; |
511 | |
512 | /* Logout PDU flags */ |
513 | #define ISCSI_FLAG_LOGOUT_REASON_MASK 0x7F |
514 | |
515 | /* logout reason_code values */ |
516 | |
517 | #define ISCSI_LOGOUT_REASON_CLOSE_SESSION 0 |
518 | #define ISCSI_LOGOUT_REASON_CLOSE_CONNECTION 1 |
519 | #define ISCSI_LOGOUT_REASON_RECOVERY 2 |
520 | #define ISCSI_LOGOUT_REASON_AEN_REQUEST 3 |
521 | |
522 | /* Logout Response Header */ |
523 | struct iscsi_logout_rsp { |
524 | uint8_t opcode; |
525 | uint8_t flags; |
526 | uint8_t response; /* see Logout response values below */ |
527 | uint8_t rsvd2; |
528 | uint8_t hlength; |
529 | uint8_t dlength[3]; |
530 | uint8_t rsvd3[8]; |
531 | itt_t itt; /* Initiator Task Tag */ |
532 | __be32 rsvd4; |
533 | __be32 statsn; |
534 | __be32 exp_cmdsn; |
535 | __be32 max_cmdsn; |
536 | __be32 rsvd5; |
537 | __be16 t2wait; |
538 | __be16 t2retain; |
539 | __be32 rsvd6; |
540 | }; |
541 | |
542 | /* logout response status values */ |
543 | |
544 | #define ISCSI_LOGOUT_SUCCESS 0 |
545 | #define ISCSI_LOGOUT_CID_NOT_FOUND 1 |
546 | #define ISCSI_LOGOUT_RECOVERY_UNSUPPORTED 2 |
547 | #define ISCSI_LOGOUT_CLEANUP_FAILED 3 |
548 | |
549 | /* SNACK Header */ |
550 | struct iscsi_snack { |
551 | uint8_t opcode; |
552 | uint8_t flags; |
553 | uint8_t rsvd2[14]; |
554 | itt_t itt; |
555 | __be32 begrun; |
556 | __be32 runlength; |
557 | __be32 exp_statsn; |
558 | __be32 rsvd3; |
559 | __be32 exp_datasn; |
560 | uint8_t rsvd6[8]; |
561 | }; |
562 | |
563 | /* SNACK PDU flags */ |
564 | #define ISCSI_FLAG_SNACK_TYPE_MASK 0x0F /* 4 bits */ |
565 | |
566 | /* Reject Message Header */ |
567 | struct iscsi_reject { |
568 | uint8_t opcode; |
569 | uint8_t flags; |
570 | uint8_t reason; |
571 | uint8_t rsvd2; |
572 | uint8_t hlength; |
573 | uint8_t dlength[3]; |
574 | uint8_t rsvd3[8]; |
575 | __be32 ffffffff; |
576 | uint8_t rsvd4[4]; |
577 | __be32 statsn; |
578 | __be32 exp_cmdsn; |
579 | __be32 max_cmdsn; |
580 | __be32 datasn; |
581 | uint8_t rsvd5[8]; |
582 | /* Text - Rejected hdr */ |
583 | }; |
584 | |
585 | /* Reason for Reject */ |
586 | #define ISCSI_REASON_CMD_BEFORE_LOGIN 1 |
587 | #define ISCSI_REASON_DATA_DIGEST_ERROR 2 |
588 | #define ISCSI_REASON_DATA_SNACK_REJECT 3 |
589 | #define ISCSI_REASON_PROTOCOL_ERROR 4 |
590 | #define ISCSI_REASON_CMD_NOT_SUPPORTED 5 |
591 | #define ISCSI_REASON_IMM_CMD_REJECT 6 |
592 | #define ISCSI_REASON_TASK_IN_PROGRESS 7 |
593 | #define ISCSI_REASON_INVALID_SNACK 8 |
594 | #define ISCSI_REASON_BOOKMARK_INVALID 9 |
595 | #define ISCSI_REASON_BOOKMARK_NO_RESOURCES 10 |
596 | #define ISCSI_REASON_NEGOTIATION_RESET 11 |
597 | |
598 | /* Max. number of Key=Value pairs in a text message */ |
599 | #define MAX_KEY_VALUE_PAIRS 8192 |
600 | |
601 | /* maximum length for text keys/values */ |
602 | #define KEY_MAXLEN 64 |
603 | #define VALUE_MAXLEN 255 |
604 | #define TARGET_NAME_MAXLEN VALUE_MAXLEN |
605 | |
606 | #define ISCSI_DEF_MAX_RECV_SEG_LEN 8192 |
607 | #define ISCSI_MIN_MAX_RECV_SEG_LEN 512 |
608 | #define ISCSI_MAX_MAX_RECV_SEG_LEN 16777215 |
609 | |
610 | #define ISCSI_DEF_FIRST_BURST_LEN 65536 |
611 | #define ISCSI_MIN_FIRST_BURST_LEN 512 |
612 | #define ISCSI_MAX_FIRST_BURST_LEN 16777215 |
613 | |
614 | #define ISCSI_DEF_MAX_BURST_LEN 262144 |
615 | #define ISCSI_MIN_MAX_BURST_LEN 512 |
616 | #define ISCSI_MAX_MAX_BURST_LEN 16777215 |
617 | |
618 | #define ISCSI_DEF_TIME2WAIT 2 |
619 | |
620 | /************************* RFC 3720 End *****************************/ |
621 | |
622 | #endif /* ISCSI_PROTO_H */ |
623 |
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od-2011-09-04
od-2011-09-18
v2.6.34-rc5
v2.6.34-rc6
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v3.9