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