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39e84790 AA |
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 | #define ISCSI_VERSION_STR "0.3" | |
25 | #define ISCSI_DATE_STR "22-Apr-2005" | |
26 | #define ISCSI_DRAFT20_VERSION 0x00 | |
27 | ||
28 | /* default iSCSI listen port for incoming connections */ | |
29 | #define ISCSI_LISTEN_PORT 3260 | |
30 | ||
31 | /* Padding word length */ | |
32 | #define PAD_WORD_LEN 4 | |
33 | ||
34 | /* | |
35 | * useful common(control and data pathes) macro | |
36 | */ | |
37 | #define ntoh24(p) (((p)[0] << 16) | ((p)[1] << 8) | ((p)[2])) | |
38 | #define hton24(p, v) { \ | |
39 | p[0] = (((v) >> 16) & 0xFF); \ | |
40 | p[1] = (((v) >> 8) & 0xFF); \ | |
41 | p[2] = ((v) & 0xFF); \ | |
42 | } | |
43 | #define zero_data(p) {p[0]=0;p[1]=0;p[2]=0;} | |
44 | ||
45 | /* | |
46 | * iSCSI Template Message Header | |
47 | */ | |
48 | struct iscsi_hdr { | |
49 | uint8_t opcode; | |
50 | uint8_t flags; /* Final bit */ | |
51 | uint8_t rsvd2[2]; | |
52 | uint8_t hlength; /* AHSs total length */ | |
53 | uint8_t dlength[3]; /* Data length */ | |
54 | uint8_t lun[8]; | |
55 | __be32 itt; /* Initiator Task Tag */ | |
56 | __be32 ttt; /* Target Task Tag */ | |
57 | __be32 statsn; | |
58 | __be32 exp_statsn; | |
baebc497 MC |
59 | __be32 max_statsn; |
60 | uint8_t other[12]; | |
39e84790 AA |
61 | }; |
62 | ||
63 | /************************* RFC 3720 Begin *****************************/ | |
64 | ||
65 | #define ISCSI_RESERVED_TAG 0xffffffff | |
66 | ||
67 | /* Opcode encoding bits */ | |
68 | #define ISCSI_OP_RETRY 0x80 | |
69 | #define ISCSI_OP_IMMEDIATE 0x40 | |
70 | #define ISCSI_OPCODE_MASK 0x3F | |
71 | ||
72 | /* Initiator Opcode values */ | |
73 | #define ISCSI_OP_NOOP_OUT 0x00 | |
74 | #define ISCSI_OP_SCSI_CMD 0x01 | |
75 | #define ISCSI_OP_SCSI_TMFUNC 0x02 | |
76 | #define ISCSI_OP_LOGIN 0x03 | |
77 | #define ISCSI_OP_TEXT 0x04 | |
78 | #define ISCSI_OP_SCSI_DATA_OUT 0x05 | |
79 | #define ISCSI_OP_LOGOUT 0x06 | |
80 | #define ISCSI_OP_SNACK 0x10 | |
81 | ||
baebc497 MC |
82 | #define ISCSI_OP_VENDOR1_CMD 0x1c |
83 | #define ISCSI_OP_VENDOR2_CMD 0x1d | |
84 | #define ISCSI_OP_VENDOR3_CMD 0x1e | |
85 | #define ISCSI_OP_VENDOR4_CMD 0x1f | |
86 | ||
39e84790 AA |
87 | /* Target Opcode values */ |
88 | #define ISCSI_OP_NOOP_IN 0x20 | |
89 | #define ISCSI_OP_SCSI_CMD_RSP 0x21 | |
90 | #define ISCSI_OP_SCSI_TMFUNC_RSP 0x22 | |
91 | #define ISCSI_OP_LOGIN_RSP 0x23 | |
92 | #define ISCSI_OP_TEXT_RSP 0x24 | |
93 | #define ISCSI_OP_SCSI_DATA_IN 0x25 | |
94 | #define ISCSI_OP_LOGOUT_RSP 0x26 | |
95 | #define ISCSI_OP_R2T 0x31 | |
96 | #define ISCSI_OP_ASYNC_EVENT 0x32 | |
97 | #define ISCSI_OP_REJECT 0x3f | |
98 | ||
baebc497 MC |
99 | struct iscsi_ahs_hdr { |
100 | __be16 ahslength; | |
101 | uint8_t ahstype; | |
102 | uint8_t ahspec[5]; | |
103 | }; | |
104 | ||
105 | #define ISCSI_AHSTYPE_CDB 1 | |
106 | #define ISCSI_AHSTYPE_RLENGTH 2 | |
107 | ||
39e84790 AA |
108 | /* iSCSI PDU Header */ |
109 | struct iscsi_cmd { | |
110 | uint8_t opcode; | |
111 | uint8_t flags; | |
baebc497 | 112 | __be16 rsvd2; |
39e84790 AA |
113 | uint8_t hlength; |
114 | uint8_t dlength[3]; | |
115 | uint8_t lun[8]; | |
116 | __be32 itt; /* Initiator Task Tag */ | |
117 | __be32 data_length; | |
118 | __be32 cmdsn; | |
119 | __be32 exp_statsn; | |
120 | uint8_t cdb[16]; /* SCSI Command Block */ | |
121 | /* Additional Data (Command Dependent) */ | |
122 | }; | |
123 | ||
124 | /* Command PDU flags */ | |
125 | #define ISCSI_FLAG_CMD_FINAL 0x80 | |
126 | #define ISCSI_FLAG_CMD_READ 0x40 | |
127 | #define ISCSI_FLAG_CMD_WRITE 0x20 | |
128 | #define ISCSI_FLAG_CMD_ATTR_MASK 0x07 /* 3 bits */ | |
129 | ||
130 | /* SCSI Command Attribute values */ | |
131 | #define ISCSI_ATTR_UNTAGGED 0 | |
132 | #define ISCSI_ATTR_SIMPLE 1 | |
133 | #define ISCSI_ATTR_ORDERED 2 | |
134 | #define ISCSI_ATTR_HEAD_OF_QUEUE 3 | |
135 | #define ISCSI_ATTR_ACA 4 | |
136 | ||
baebc497 MC |
137 | struct iscsi_rlength_ahdr { |
138 | __be16 ahslength; | |
139 | uint8_t ahstype; | |
140 | uint8_t reserved; | |
141 | __be32 read_length; | |
142 | }; | |
143 | ||
39e84790 AA |
144 | /* SCSI Response Header */ |
145 | struct iscsi_cmd_rsp { | |
146 | uint8_t opcode; | |
147 | uint8_t flags; | |
148 | uint8_t response; | |
149 | uint8_t cmd_status; | |
150 | uint8_t hlength; | |
151 | uint8_t dlength[3]; | |
152 | uint8_t rsvd[8]; | |
153 | __be32 itt; /* Initiator Task Tag */ | |
154 | __be32 rsvd1; | |
155 | __be32 statsn; | |
156 | __be32 exp_cmdsn; | |
157 | __be32 max_cmdsn; | |
158 | __be32 exp_datasn; | |
159 | __be32 bi_residual_count; | |
160 | __be32 residual_count; | |
161 | /* Response or Sense Data (optional) */ | |
162 | }; | |
163 | ||
164 | /* Command Response PDU flags */ | |
165 | #define ISCSI_FLAG_CMD_BIDI_OVERFLOW 0x10 | |
166 | #define ISCSI_FLAG_CMD_BIDI_UNDERFLOW 0x08 | |
167 | #define ISCSI_FLAG_CMD_OVERFLOW 0x04 | |
168 | #define ISCSI_FLAG_CMD_UNDERFLOW 0x02 | |
169 | ||
170 | /* iSCSI Status values. Valid if Rsp Selector bit is not set */ | |
171 | #define ISCSI_STATUS_CMD_COMPLETED 0 | |
172 | #define ISCSI_STATUS_TARGET_FAILURE 1 | |
173 | #define ISCSI_STATUS_SUBSYS_FAILURE 2 | |
174 | ||
175 | /* Asynchronous Event Header */ | |
176 | struct iscsi_async { | |
177 | uint8_t opcode; | |
178 | uint8_t flags; | |
179 | uint8_t rsvd2[2]; | |
180 | uint8_t rsvd3; | |
181 | uint8_t dlength[3]; | |
182 | uint8_t lun[8]; | |
183 | uint8_t rsvd4[8]; | |
184 | __be32 statsn; | |
185 | __be32 exp_cmdsn; | |
186 | __be32 max_cmdsn; | |
187 | uint8_t async_event; | |
188 | uint8_t async_vcode; | |
189 | __be16 param1; | |
190 | __be16 param2; | |
191 | __be16 param3; | |
192 | uint8_t rsvd5[4]; | |
193 | }; | |
194 | ||
195 | /* iSCSI Event Codes */ | |
196 | #define ISCSI_ASYNC_MSG_SCSI_EVENT 0 | |
197 | #define ISCSI_ASYNC_MSG_REQUEST_LOGOUT 1 | |
198 | #define ISCSI_ASYNC_MSG_DROPPING_CONNECTION 2 | |
199 | #define ISCSI_ASYNC_MSG_DROPPING_ALL_CONNECTIONS 3 | |
200 | #define ISCSI_ASYNC_MSG_PARAM_NEGOTIATION 4 | |
201 | #define ISCSI_ASYNC_MSG_VENDOR_SPECIFIC 255 | |
202 | ||
203 | /* NOP-Out Message */ | |
204 | struct iscsi_nopout { | |
205 | uint8_t opcode; | |
206 | uint8_t flags; | |
207 | __be16 rsvd2; | |
208 | uint8_t rsvd3; | |
209 | uint8_t dlength[3]; | |
210 | uint8_t lun[8]; | |
211 | __be32 itt; /* Initiator Task Tag */ | |
212 | __be32 ttt; /* Target Transfer Tag */ | |
213 | __be32 cmdsn; | |
214 | __be32 exp_statsn; | |
215 | uint8_t rsvd4[16]; | |
216 | }; | |
217 | ||
218 | /* NOP-In Message */ | |
219 | struct iscsi_nopin { | |
220 | uint8_t opcode; | |
221 | uint8_t flags; | |
222 | __be16 rsvd2; | |
223 | uint8_t rsvd3; | |
224 | uint8_t dlength[3]; | |
225 | uint8_t lun[8]; | |
226 | __be32 itt; /* Initiator Task Tag */ | |
227 | __be32 ttt; /* Target Transfer Tag */ | |
228 | __be32 statsn; | |
229 | __be32 exp_cmdsn; | |
230 | __be32 max_cmdsn; | |
231 | uint8_t rsvd4[12]; | |
232 | }; | |
233 | ||
234 | /* SCSI Task Management Message Header */ | |
235 | struct iscsi_tm { | |
236 | uint8_t opcode; | |
237 | uint8_t flags; | |
238 | uint8_t rsvd1[2]; | |
239 | uint8_t hlength; | |
240 | uint8_t dlength[3]; | |
241 | uint8_t lun[8]; | |
242 | __be32 itt; /* Initiator Task Tag */ | |
243 | __be32 rtt; /* Reference Task Tag */ | |
244 | __be32 cmdsn; | |
245 | __be32 exp_statsn; | |
246 | __be32 refcmdsn; | |
247 | __be32 exp_datasn; | |
248 | uint8_t rsvd2[8]; | |
249 | }; | |
250 | ||
baebc497 | 251 | #define ISCSI_FLAG_TM_FUNC_MASK 0x7F |
39e84790 AA |
252 | |
253 | /* Function values */ | |
254 | #define ISCSI_TM_FUNC_ABORT_TASK 1 | |
255 | #define ISCSI_TM_FUNC_ABORT_TASK_SET 2 | |
256 | #define ISCSI_TM_FUNC_CLEAR_ACA 3 | |
257 | #define ISCSI_TM_FUNC_CLEAR_TASK_SET 4 | |
258 | #define ISCSI_TM_FUNC_LOGICAL_UNIT_RESET 5 | |
259 | #define ISCSI_TM_FUNC_TARGET_WARM_RESET 6 | |
260 | #define ISCSI_TM_FUNC_TARGET_COLD_RESET 7 | |
261 | #define ISCSI_TM_FUNC_TASK_REASSIGN 8 | |
262 | ||
263 | /* SCSI Task Management Response Header */ | |
264 | struct iscsi_tm_rsp { | |
265 | uint8_t opcode; | |
266 | uint8_t flags; | |
267 | uint8_t response; /* see Response values below */ | |
268 | uint8_t qualifier; | |
269 | uint8_t hlength; | |
270 | uint8_t dlength[3]; | |
271 | uint8_t rsvd2[8]; | |
272 | __be32 itt; /* Initiator Task Tag */ | |
273 | __be32 rtt; /* Reference Task Tag */ | |
274 | __be32 statsn; | |
275 | __be32 exp_cmdsn; | |
276 | __be32 max_cmdsn; | |
277 | uint8_t rsvd3[12]; | |
278 | }; | |
279 | ||
280 | /* Response values */ | |
baebc497 MC |
281 | #define ISCSI_TMF_RSP_COMPLETE 0x00 |
282 | #define ISCSI_TMF_RSP_NO_TASK 0x01 | |
283 | #define ISCSI_TMF_RSP_NO_LUN 0x02 | |
284 | #define ISCSI_TMF_RSP_TASK_ALLEGIANT 0x03 | |
285 | #define ISCSI_TMF_RSP_NO_FAILOVER 0x04 | |
286 | #define ISCSI_TMF_RSP_NOT_SUPPORTED 0x05 | |
287 | #define ISCSI_TMF_RSP_AUTH_FAILED 0x06 | |
288 | #define ISCSI_TMF_RSP_REJECTED 0xff | |
39e84790 AA |
289 | |
290 | /* Ready To Transfer Header */ | |
291 | struct iscsi_r2t_rsp { | |
292 | uint8_t opcode; | |
293 | uint8_t flags; | |
294 | uint8_t rsvd2[2]; | |
295 | uint8_t hlength; | |
296 | uint8_t dlength[3]; | |
297 | uint8_t lun[8]; | |
298 | __be32 itt; /* Initiator Task Tag */ | |
299 | __be32 ttt; /* Target Transfer Tag */ | |
300 | __be32 statsn; | |
301 | __be32 exp_cmdsn; | |
302 | __be32 max_cmdsn; | |
303 | __be32 r2tsn; | |
304 | __be32 data_offset; | |
305 | __be32 data_length; | |
306 | }; | |
307 | ||
308 | /* SCSI Data Hdr */ | |
309 | struct iscsi_data { | |
310 | uint8_t opcode; | |
311 | uint8_t flags; | |
312 | uint8_t rsvd2[2]; | |
313 | uint8_t rsvd3; | |
314 | uint8_t dlength[3]; | |
315 | uint8_t lun[8]; | |
316 | __be32 itt; | |
317 | __be32 ttt; | |
318 | __be32 rsvd4; | |
319 | __be32 exp_statsn; | |
320 | __be32 rsvd5; | |
321 | __be32 datasn; | |
322 | __be32 offset; | |
323 | __be32 rsvd6; | |
324 | /* Payload */ | |
325 | }; | |
326 | ||
327 | /* SCSI Data Response Hdr */ | |
328 | struct iscsi_data_rsp { | |
329 | uint8_t opcode; | |
330 | uint8_t flags; | |
331 | uint8_t rsvd2; | |
332 | uint8_t cmd_status; | |
333 | uint8_t hlength; | |
334 | uint8_t dlength[3]; | |
335 | uint8_t lun[8]; | |
336 | __be32 itt; | |
337 | __be32 ttt; | |
338 | __be32 statsn; | |
339 | __be32 exp_cmdsn; | |
340 | __be32 max_cmdsn; | |
341 | __be32 datasn; | |
342 | __be32 offset; | |
343 | __be32 residual_count; | |
344 | }; | |
345 | ||
346 | /* Data Response PDU flags */ | |
347 | #define ISCSI_FLAG_DATA_ACK 0x40 | |
348 | #define ISCSI_FLAG_DATA_OVERFLOW 0x04 | |
349 | #define ISCSI_FLAG_DATA_UNDERFLOW 0x02 | |
350 | #define ISCSI_FLAG_DATA_STATUS 0x01 | |
351 | ||
352 | /* Text Header */ | |
353 | struct iscsi_text { | |
354 | uint8_t opcode; | |
355 | uint8_t flags; | |
356 | uint8_t rsvd2[2]; | |
357 | uint8_t hlength; | |
358 | uint8_t dlength[3]; | |
359 | uint8_t rsvd4[8]; | |
360 | __be32 itt; | |
361 | __be32 ttt; | |
362 | __be32 cmdsn; | |
363 | __be32 exp_statsn; | |
364 | uint8_t rsvd5[16]; | |
365 | /* Text - key=value pairs */ | |
366 | }; | |
367 | ||
368 | #define ISCSI_FLAG_TEXT_CONTINUE 0x40 | |
369 | ||
370 | /* Text Response Header */ | |
371 | struct iscsi_text_rsp { | |
372 | uint8_t opcode; | |
373 | uint8_t flags; | |
374 | uint8_t rsvd2[2]; | |
375 | uint8_t hlength; | |
376 | uint8_t dlength[3]; | |
377 | uint8_t rsvd4[8]; | |
378 | __be32 itt; | |
379 | __be32 ttt; | |
380 | __be32 statsn; | |
381 | __be32 exp_cmdsn; | |
382 | __be32 max_cmdsn; | |
383 | uint8_t rsvd5[12]; | |
384 | /* Text Response - key:value pairs */ | |
385 | }; | |
386 | ||
387 | /* Login Header */ | |
388 | struct iscsi_login { | |
389 | uint8_t opcode; | |
390 | uint8_t flags; | |
391 | uint8_t max_version; /* Max. version supported */ | |
392 | uint8_t min_version; /* Min. version supported */ | |
393 | uint8_t hlength; | |
394 | uint8_t dlength[3]; | |
395 | uint8_t isid[6]; /* Initiator Session ID */ | |
396 | __be16 tsih; /* Target Session Handle */ | |
397 | __be32 itt; /* Initiator Task Tag */ | |
398 | __be16 cid; | |
399 | __be16 rsvd3; | |
400 | __be32 cmdsn; | |
401 | __be32 exp_statsn; | |
402 | uint8_t rsvd5[16]; | |
403 | }; | |
404 | ||
405 | /* Login PDU flags */ | |
406 | #define ISCSI_FLAG_LOGIN_TRANSIT 0x80 | |
407 | #define ISCSI_FLAG_LOGIN_CONTINUE 0x40 | |
408 | #define ISCSI_FLAG_LOGIN_CURRENT_STAGE_MASK 0x0C /* 2 bits */ | |
409 | #define ISCSI_FLAG_LOGIN_NEXT_STAGE_MASK 0x03 /* 2 bits */ | |
410 | ||
411 | #define ISCSI_LOGIN_CURRENT_STAGE(flags) \ | |
412 | ((flags & ISCSI_FLAG_LOGIN_CURRENT_STAGE_MASK) >> 2) | |
413 | #define ISCSI_LOGIN_NEXT_STAGE(flags) \ | |
414 | (flags & ISCSI_FLAG_LOGIN_NEXT_STAGE_MASK) | |
415 | ||
416 | /* Login Response Header */ | |
417 | struct iscsi_login_rsp { | |
418 | uint8_t opcode; | |
419 | uint8_t flags; | |
420 | uint8_t max_version; /* Max. version supported */ | |
421 | uint8_t active_version; /* Active version */ | |
422 | uint8_t hlength; | |
423 | uint8_t dlength[3]; | |
424 | uint8_t isid[6]; /* Initiator Session ID */ | |
425 | __be16 tsih; /* Target Session Handle */ | |
426 | __be32 itt; /* Initiator Task Tag */ | |
427 | __be32 rsvd3; | |
428 | __be32 statsn; | |
429 | __be32 exp_cmdsn; | |
430 | __be32 max_cmdsn; | |
431 | uint8_t status_class; /* see Login RSP ststus classes below */ | |
432 | uint8_t status_detail; /* see Login RSP Status details below */ | |
433 | uint8_t rsvd4[10]; | |
434 | }; | |
435 | ||
436 | /* Login stage (phase) codes for CSG, NSG */ | |
437 | #define ISCSI_INITIAL_LOGIN_STAGE -1 | |
438 | #define ISCSI_SECURITY_NEGOTIATION_STAGE 0 | |
439 | #define ISCSI_OP_PARMS_NEGOTIATION_STAGE 1 | |
440 | #define ISCSI_FULL_FEATURE_PHASE 3 | |
441 | ||
442 | /* Login Status response classes */ | |
443 | #define ISCSI_STATUS_CLS_SUCCESS 0x00 | |
444 | #define ISCSI_STATUS_CLS_REDIRECT 0x01 | |
445 | #define ISCSI_STATUS_CLS_INITIATOR_ERR 0x02 | |
446 | #define ISCSI_STATUS_CLS_TARGET_ERR 0x03 | |
447 | ||
448 | /* Login Status response detail codes */ | |
449 | /* Class-0 (Success) */ | |
450 | #define ISCSI_LOGIN_STATUS_ACCEPT 0x00 | |
451 | ||
452 | /* Class-1 (Redirection) */ | |
453 | #define ISCSI_LOGIN_STATUS_TGT_MOVED_TEMP 0x01 | |
454 | #define ISCSI_LOGIN_STATUS_TGT_MOVED_PERM 0x02 | |
455 | ||
456 | /* Class-2 (Initiator Error) */ | |
457 | #define ISCSI_LOGIN_STATUS_INIT_ERR 0x00 | |
458 | #define ISCSI_LOGIN_STATUS_AUTH_FAILED 0x01 | |
459 | #define ISCSI_LOGIN_STATUS_TGT_FORBIDDEN 0x02 | |
460 | #define ISCSI_LOGIN_STATUS_TGT_NOT_FOUND 0x03 | |
461 | #define ISCSI_LOGIN_STATUS_TGT_REMOVED 0x04 | |
462 | #define ISCSI_LOGIN_STATUS_NO_VERSION 0x05 | |
463 | #define ISCSI_LOGIN_STATUS_ISID_ERROR 0x06 | |
464 | #define ISCSI_LOGIN_STATUS_MISSING_FIELDS 0x07 | |
465 | #define ISCSI_LOGIN_STATUS_CONN_ADD_FAILED 0x08 | |
466 | #define ISCSI_LOGIN_STATUS_NO_SESSION_TYPE 0x09 | |
467 | #define ISCSI_LOGIN_STATUS_NO_SESSION 0x0a | |
468 | #define ISCSI_LOGIN_STATUS_INVALID_REQUEST 0x0b | |
469 | ||
470 | /* Class-3 (Target Error) */ | |
471 | #define ISCSI_LOGIN_STATUS_TARGET_ERROR 0x00 | |
472 | #define ISCSI_LOGIN_STATUS_SVC_UNAVAILABLE 0x01 | |
473 | #define ISCSI_LOGIN_STATUS_NO_RESOURCES 0x02 | |
474 | ||
475 | /* Logout Header */ | |
476 | struct iscsi_logout { | |
477 | uint8_t opcode; | |
478 | uint8_t flags; | |
479 | uint8_t rsvd1[2]; | |
480 | uint8_t hlength; | |
481 | uint8_t dlength[3]; | |
482 | uint8_t rsvd2[8]; | |
483 | __be32 itt; /* Initiator Task Tag */ | |
484 | __be16 cid; | |
485 | uint8_t rsvd3[2]; | |
486 | __be32 cmdsn; | |
487 | __be32 exp_statsn; | |
488 | uint8_t rsvd4[16]; | |
489 | }; | |
490 | ||
491 | /* Logout PDU flags */ | |
492 | #define ISCSI_FLAG_LOGOUT_REASON_MASK 0x7F | |
493 | ||
494 | /* logout reason_code values */ | |
495 | ||
496 | #define ISCSI_LOGOUT_REASON_CLOSE_SESSION 0 | |
497 | #define ISCSI_LOGOUT_REASON_CLOSE_CONNECTION 1 | |
498 | #define ISCSI_LOGOUT_REASON_RECOVERY 2 | |
499 | #define ISCSI_LOGOUT_REASON_AEN_REQUEST 3 | |
500 | ||
501 | /* Logout Response Header */ | |
502 | struct iscsi_logout_rsp { | |
503 | uint8_t opcode; | |
504 | uint8_t flags; | |
505 | uint8_t response; /* see Logout response values below */ | |
506 | uint8_t rsvd2; | |
507 | uint8_t hlength; | |
508 | uint8_t dlength[3]; | |
509 | uint8_t rsvd3[8]; | |
510 | __be32 itt; /* Initiator Task Tag */ | |
511 | __be32 rsvd4; | |
512 | __be32 statsn; | |
513 | __be32 exp_cmdsn; | |
514 | __be32 max_cmdsn; | |
515 | __be32 rsvd5; | |
516 | __be16 t2wait; | |
517 | __be16 t2retain; | |
518 | __be32 rsvd6; | |
519 | }; | |
520 | ||
521 | /* logout response status values */ | |
522 | ||
523 | #define ISCSI_LOGOUT_SUCCESS 0 | |
524 | #define ISCSI_LOGOUT_CID_NOT_FOUND 1 | |
525 | #define ISCSI_LOGOUT_RECOVERY_UNSUPPORTED 2 | |
526 | #define ISCSI_LOGOUT_CLEANUP_FAILED 3 | |
527 | ||
528 | /* SNACK Header */ | |
529 | struct iscsi_snack { | |
530 | uint8_t opcode; | |
531 | uint8_t flags; | |
532 | uint8_t rsvd2[14]; | |
533 | __be32 itt; | |
534 | __be32 begrun; | |
535 | __be32 runlength; | |
536 | __be32 exp_statsn; | |
537 | __be32 rsvd3; | |
538 | __be32 exp_datasn; | |
539 | uint8_t rsvd6[8]; | |
540 | }; | |
541 | ||
542 | /* SNACK PDU flags */ | |
543 | #define ISCSI_FLAG_SNACK_TYPE_MASK 0x0F /* 4 bits */ | |
544 | ||
545 | /* Reject Message Header */ | |
546 | struct iscsi_reject { | |
547 | uint8_t opcode; | |
548 | uint8_t flags; | |
549 | uint8_t reason; | |
550 | uint8_t rsvd2; | |
551 | uint8_t rsvd3; | |
552 | uint8_t dlength[3]; | |
553 | uint8_t rsvd4[16]; | |
554 | __be32 statsn; | |
555 | __be32 exp_cmdsn; | |
556 | __be32 max_cmdsn; | |
557 | __be32 datasn; | |
558 | uint8_t rsvd5[8]; | |
559 | /* Text - Rejected hdr */ | |
560 | }; | |
561 | ||
562 | /* Reason for Reject */ | |
563 | #define CMD_BEFORE_LOGIN 1 | |
564 | #define DATA_DIGEST_ERROR 2 | |
565 | #define DATA_SNACK_REJECT 3 | |
566 | #define ISCSI_PROTOCOL_ERROR 4 | |
567 | #define CMD_NOT_SUPPORTED 5 | |
568 | #define IMM_CMD_REJECT 6 | |
569 | #define TASK_IN_PROGRESS 7 | |
570 | #define INVALID_SNACK 8 | |
571 | #define BOOKMARK_REJECTED 9 | |
572 | #define BOOKMARK_NO_RESOURCES 10 | |
573 | #define NEGOTIATION_RESET 11 | |
574 | ||
575 | /* Max. number of Key=Value pairs in a text message */ | |
576 | #define MAX_KEY_VALUE_PAIRS 8192 | |
577 | ||
578 | /* maximum length for text keys/values */ | |
579 | #define KEY_MAXLEN 64 | |
580 | #define VALUE_MAXLEN 255 | |
581 | #define TARGET_NAME_MAXLEN VALUE_MAXLEN | |
582 | ||
583 | #define DEFAULT_MAX_RECV_DATA_SEGMENT_LENGTH 8192 | |
584 | ||
585 | /************************* RFC 3720 End *****************************/ | |
586 | ||
587 | #endif /* ISCSI_PROTO_H */ |