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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 | ||
26974789 MC |
24 | #include <linux/types.h> |
25 | ||
39e84790 AA |
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 */ | |
004d6530 | 32 | #define ISCSI_PAD_LEN 4 |
39e84790 AA |
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 | ||
b4377356 AV |
45 | /* initiator tags; opaque for target */ |
46 | typedef uint32_t __bitwise__ itt_t; | |
47 | /* below makes sense only for initiator that created this tag */ | |
8b1d0343 MC |
48 | #define build_itt(itt, age) ((__force itt_t)\ |
49 | ((itt) | ((age) << ISCSI_AGE_SHIFT))) | |
b4377356 AV |
50 | #define get_itt(itt) ((__force uint32_t)(itt_t)(itt) & ISCSI_ITT_MASK) |
51 | #define RESERVED_ITT ((__force itt_t)0xffffffff) | |
52 | ||
39e84790 AA |
53 | /* |
54 | * iSCSI Template Message Header | |
55 | */ | |
56 | struct iscsi_hdr { | |
57 | uint8_t opcode; | |
58 | uint8_t flags; /* Final bit */ | |
59 | uint8_t rsvd2[2]; | |
60 | uint8_t hlength; /* AHSs total length */ | |
61 | uint8_t dlength[3]; /* Data length */ | |
62 | uint8_t lun[8]; | |
b4377356 | 63 | itt_t itt; /* Initiator Task Tag, opaque for target */ |
39e84790 AA |
64 | __be32 ttt; /* Target Task Tag */ |
65 | __be32 statsn; | |
66 | __be32 exp_statsn; | |
baebc497 MC |
67 | __be32 max_statsn; |
68 | uint8_t other[12]; | |
39e84790 AA |
69 | }; |
70 | ||
71 | /************************* RFC 3720 Begin *****************************/ | |
72 | ||
73 | #define ISCSI_RESERVED_TAG 0xffffffff | |
74 | ||
75 | /* Opcode encoding bits */ | |
76 | #define ISCSI_OP_RETRY 0x80 | |
77 | #define ISCSI_OP_IMMEDIATE 0x40 | |
78 | #define ISCSI_OPCODE_MASK 0x3F | |
79 | ||
80 | /* Initiator Opcode values */ | |
81 | #define ISCSI_OP_NOOP_OUT 0x00 | |
82 | #define ISCSI_OP_SCSI_CMD 0x01 | |
83 | #define ISCSI_OP_SCSI_TMFUNC 0x02 | |
84 | #define ISCSI_OP_LOGIN 0x03 | |
85 | #define ISCSI_OP_TEXT 0x04 | |
86 | #define ISCSI_OP_SCSI_DATA_OUT 0x05 | |
87 | #define ISCSI_OP_LOGOUT 0x06 | |
88 | #define ISCSI_OP_SNACK 0x10 | |
89 | ||
baebc497 MC |
90 | #define ISCSI_OP_VENDOR1_CMD 0x1c |
91 | #define ISCSI_OP_VENDOR2_CMD 0x1d | |
92 | #define ISCSI_OP_VENDOR3_CMD 0x1e | |
93 | #define ISCSI_OP_VENDOR4_CMD 0x1f | |
94 | ||
39e84790 AA |
95 | /* Target Opcode values */ |
96 | #define ISCSI_OP_NOOP_IN 0x20 | |
97 | #define ISCSI_OP_SCSI_CMD_RSP 0x21 | |
98 | #define ISCSI_OP_SCSI_TMFUNC_RSP 0x22 | |
99 | #define ISCSI_OP_LOGIN_RSP 0x23 | |
100 | #define ISCSI_OP_TEXT_RSP 0x24 | |
101 | #define ISCSI_OP_SCSI_DATA_IN 0x25 | |
102 | #define ISCSI_OP_LOGOUT_RSP 0x26 | |
103 | #define ISCSI_OP_R2T 0x31 | |
104 | #define ISCSI_OP_ASYNC_EVENT 0x32 | |
105 | #define ISCSI_OP_REJECT 0x3f | |
106 | ||
baebc497 MC |
107 | struct iscsi_ahs_hdr { |
108 | __be16 ahslength; | |
109 | uint8_t ahstype; | |
110 | uint8_t ahspec[5]; | |
111 | }; | |
112 | ||
113 | #define ISCSI_AHSTYPE_CDB 1 | |
114 | #define ISCSI_AHSTYPE_RLENGTH 2 | |
115 | ||
39e84790 AA |
116 | /* iSCSI PDU Header */ |
117 | struct iscsi_cmd { | |
118 | uint8_t opcode; | |
119 | uint8_t flags; | |
baebc497 | 120 | __be16 rsvd2; |
39e84790 AA |
121 | uint8_t hlength; |
122 | uint8_t dlength[3]; | |
123 | uint8_t lun[8]; | |
b4377356 | 124 | itt_t itt; /* Initiator Task Tag */ |
39e84790 AA |
125 | __be32 data_length; |
126 | __be32 cmdsn; | |
127 | __be32 exp_statsn; | |
128 | uint8_t cdb[16]; /* SCSI Command Block */ | |
129 | /* Additional Data (Command Dependent) */ | |
130 | }; | |
131 | ||
132 | /* Command PDU flags */ | |
133 | #define ISCSI_FLAG_CMD_FINAL 0x80 | |
134 | #define ISCSI_FLAG_CMD_READ 0x40 | |
135 | #define ISCSI_FLAG_CMD_WRITE 0x20 | |
136 | #define ISCSI_FLAG_CMD_ATTR_MASK 0x07 /* 3 bits */ | |
137 | ||
138 | /* SCSI Command Attribute values */ | |
139 | #define ISCSI_ATTR_UNTAGGED 0 | |
140 | #define ISCSI_ATTR_SIMPLE 1 | |
141 | #define ISCSI_ATTR_ORDERED 2 | |
142 | #define ISCSI_ATTR_HEAD_OF_QUEUE 3 | |
143 | #define ISCSI_ATTR_ACA 4 | |
144 | ||
baebc497 MC |
145 | struct iscsi_rlength_ahdr { |
146 | __be16 ahslength; | |
147 | uint8_t ahstype; | |
148 | uint8_t reserved; | |
149 | __be32 read_length; | |
150 | }; | |
151 | ||
004d6530 BH |
152 | /* Extended CDB AHS */ |
153 | struct iscsi_ecdb_ahdr { | |
154 | __be16 ahslength; /* CDB length - 15, including reserved byte */ | |
155 | uint8_t ahstype; | |
156 | uint8_t reserved; | |
157 | uint8_t ecdb[260 - 16]; /* 4-byte aligned extended CDB spillover */ | |
158 | }; | |
159 | ||
39e84790 AA |
160 | /* SCSI Response Header */ |
161 | struct iscsi_cmd_rsp { | |
162 | uint8_t opcode; | |
163 | uint8_t flags; | |
164 | uint8_t response; | |
165 | uint8_t cmd_status; | |
166 | uint8_t hlength; | |
167 | uint8_t dlength[3]; | |
168 | uint8_t rsvd[8]; | |
b4377356 | 169 | itt_t itt; /* Initiator Task Tag */ |
39e84790 AA |
170 | __be32 rsvd1; |
171 | __be32 statsn; | |
172 | __be32 exp_cmdsn; | |
173 | __be32 max_cmdsn; | |
174 | __be32 exp_datasn; | |
175 | __be32 bi_residual_count; | |
176 | __be32 residual_count; | |
177 | /* Response or Sense Data (optional) */ | |
178 | }; | |
179 | ||
180 | /* Command Response PDU flags */ | |
181 | #define ISCSI_FLAG_CMD_BIDI_OVERFLOW 0x10 | |
182 | #define ISCSI_FLAG_CMD_BIDI_UNDERFLOW 0x08 | |
183 | #define ISCSI_FLAG_CMD_OVERFLOW 0x04 | |
184 | #define ISCSI_FLAG_CMD_UNDERFLOW 0x02 | |
185 | ||
186 | /* iSCSI Status values. Valid if Rsp Selector bit is not set */ | |
187 | #define ISCSI_STATUS_CMD_COMPLETED 0 | |
188 | #define ISCSI_STATUS_TARGET_FAILURE 1 | |
189 | #define ISCSI_STATUS_SUBSYS_FAILURE 2 | |
190 | ||
191 | /* Asynchronous Event Header */ | |
192 | struct iscsi_async { | |
193 | uint8_t opcode; | |
194 | uint8_t flags; | |
195 | uint8_t rsvd2[2]; | |
196 | uint8_t rsvd3; | |
197 | uint8_t dlength[3]; | |
198 | uint8_t lun[8]; | |
199 | uint8_t rsvd4[8]; | |
200 | __be32 statsn; | |
201 | __be32 exp_cmdsn; | |
202 | __be32 max_cmdsn; | |
203 | uint8_t async_event; | |
204 | uint8_t async_vcode; | |
205 | __be16 param1; | |
206 | __be16 param2; | |
207 | __be16 param3; | |
208 | uint8_t rsvd5[4]; | |
209 | }; | |
210 | ||
211 | /* iSCSI Event Codes */ | |
212 | #define ISCSI_ASYNC_MSG_SCSI_EVENT 0 | |
213 | #define ISCSI_ASYNC_MSG_REQUEST_LOGOUT 1 | |
214 | #define ISCSI_ASYNC_MSG_DROPPING_CONNECTION 2 | |
215 | #define ISCSI_ASYNC_MSG_DROPPING_ALL_CONNECTIONS 3 | |
216 | #define ISCSI_ASYNC_MSG_PARAM_NEGOTIATION 4 | |
217 | #define ISCSI_ASYNC_MSG_VENDOR_SPECIFIC 255 | |
218 | ||
219 | /* NOP-Out Message */ | |
220 | struct iscsi_nopout { | |
221 | uint8_t opcode; | |
222 | uint8_t flags; | |
223 | __be16 rsvd2; | |
224 | uint8_t rsvd3; | |
225 | uint8_t dlength[3]; | |
226 | uint8_t lun[8]; | |
b4377356 | 227 | itt_t itt; /* Initiator Task Tag */ |
39e84790 AA |
228 | __be32 ttt; /* Target Transfer Tag */ |
229 | __be32 cmdsn; | |
230 | __be32 exp_statsn; | |
231 | uint8_t rsvd4[16]; | |
232 | }; | |
233 | ||
234 | /* NOP-In Message */ | |
235 | struct iscsi_nopin { | |
236 | uint8_t opcode; | |
237 | uint8_t flags; | |
238 | __be16 rsvd2; | |
239 | uint8_t rsvd3; | |
240 | uint8_t dlength[3]; | |
241 | uint8_t lun[8]; | |
b4377356 | 242 | itt_t itt; /* Initiator Task Tag */ |
39e84790 AA |
243 | __be32 ttt; /* Target Transfer Tag */ |
244 | __be32 statsn; | |
245 | __be32 exp_cmdsn; | |
246 | __be32 max_cmdsn; | |
247 | uint8_t rsvd4[12]; | |
248 | }; | |
249 | ||
250 | /* SCSI Task Management Message Header */ | |
251 | struct iscsi_tm { | |
252 | uint8_t opcode; | |
253 | uint8_t flags; | |
254 | uint8_t rsvd1[2]; | |
255 | uint8_t hlength; | |
256 | uint8_t dlength[3]; | |
257 | uint8_t lun[8]; | |
b4377356 AV |
258 | itt_t itt; /* Initiator Task Tag */ |
259 | itt_t rtt; /* Reference Task Tag */ | |
39e84790 AA |
260 | __be32 cmdsn; |
261 | __be32 exp_statsn; | |
262 | __be32 refcmdsn; | |
263 | __be32 exp_datasn; | |
264 | uint8_t rsvd2[8]; | |
265 | }; | |
266 | ||
baebc497 | 267 | #define ISCSI_FLAG_TM_FUNC_MASK 0x7F |
39e84790 AA |
268 | |
269 | /* Function values */ | |
270 | #define ISCSI_TM_FUNC_ABORT_TASK 1 | |
271 | #define ISCSI_TM_FUNC_ABORT_TASK_SET 2 | |
272 | #define ISCSI_TM_FUNC_CLEAR_ACA 3 | |
273 | #define ISCSI_TM_FUNC_CLEAR_TASK_SET 4 | |
274 | #define ISCSI_TM_FUNC_LOGICAL_UNIT_RESET 5 | |
275 | #define ISCSI_TM_FUNC_TARGET_WARM_RESET 6 | |
276 | #define ISCSI_TM_FUNC_TARGET_COLD_RESET 7 | |
277 | #define ISCSI_TM_FUNC_TASK_REASSIGN 8 | |
278 | ||
279 | /* SCSI Task Management Response Header */ | |
280 | struct iscsi_tm_rsp { | |
281 | uint8_t opcode; | |
282 | uint8_t flags; | |
283 | uint8_t response; /* see Response values below */ | |
284 | uint8_t qualifier; | |
285 | uint8_t hlength; | |
286 | uint8_t dlength[3]; | |
287 | uint8_t rsvd2[8]; | |
b4377356 AV |
288 | itt_t itt; /* Initiator Task Tag */ |
289 | itt_t rtt; /* Reference Task Tag */ | |
39e84790 AA |
290 | __be32 statsn; |
291 | __be32 exp_cmdsn; | |
292 | __be32 max_cmdsn; | |
293 | uint8_t rsvd3[12]; | |
294 | }; | |
295 | ||
296 | /* Response values */ | |
baebc497 MC |
297 | #define ISCSI_TMF_RSP_COMPLETE 0x00 |
298 | #define ISCSI_TMF_RSP_NO_TASK 0x01 | |
299 | #define ISCSI_TMF_RSP_NO_LUN 0x02 | |
300 | #define ISCSI_TMF_RSP_TASK_ALLEGIANT 0x03 | |
301 | #define ISCSI_TMF_RSP_NO_FAILOVER 0x04 | |
302 | #define ISCSI_TMF_RSP_NOT_SUPPORTED 0x05 | |
303 | #define ISCSI_TMF_RSP_AUTH_FAILED 0x06 | |
304 | #define ISCSI_TMF_RSP_REJECTED 0xff | |
39e84790 AA |
305 | |
306 | /* Ready To Transfer Header */ | |
307 | struct iscsi_r2t_rsp { | |
308 | uint8_t opcode; | |
309 | uint8_t flags; | |
310 | uint8_t rsvd2[2]; | |
311 | uint8_t hlength; | |
312 | uint8_t dlength[3]; | |
313 | uint8_t lun[8]; | |
b4377356 | 314 | itt_t itt; /* Initiator Task Tag */ |
39e84790 AA |
315 | __be32 ttt; /* Target Transfer Tag */ |
316 | __be32 statsn; | |
317 | __be32 exp_cmdsn; | |
318 | __be32 max_cmdsn; | |
319 | __be32 r2tsn; | |
320 | __be32 data_offset; | |
321 | __be32 data_length; | |
322 | }; | |
323 | ||
324 | /* SCSI Data Hdr */ | |
325 | struct iscsi_data { | |
326 | uint8_t opcode; | |
327 | uint8_t flags; | |
328 | uint8_t rsvd2[2]; | |
329 | uint8_t rsvd3; | |
330 | uint8_t dlength[3]; | |
331 | uint8_t lun[8]; | |
b4377356 | 332 | itt_t itt; |
39e84790 AA |
333 | __be32 ttt; |
334 | __be32 rsvd4; | |
335 | __be32 exp_statsn; | |
336 | __be32 rsvd5; | |
337 | __be32 datasn; | |
338 | __be32 offset; | |
339 | __be32 rsvd6; | |
340 | /* Payload */ | |
341 | }; | |
342 | ||
343 | /* SCSI Data Response Hdr */ | |
344 | struct iscsi_data_rsp { | |
345 | uint8_t opcode; | |
346 | uint8_t flags; | |
347 | uint8_t rsvd2; | |
348 | uint8_t cmd_status; | |
349 | uint8_t hlength; | |
350 | uint8_t dlength[3]; | |
351 | uint8_t lun[8]; | |
b4377356 | 352 | itt_t itt; |
39e84790 AA |
353 | __be32 ttt; |
354 | __be32 statsn; | |
355 | __be32 exp_cmdsn; | |
356 | __be32 max_cmdsn; | |
357 | __be32 datasn; | |
358 | __be32 offset; | |
359 | __be32 residual_count; | |
360 | }; | |
361 | ||
362 | /* Data Response PDU flags */ | |
363 | #define ISCSI_FLAG_DATA_ACK 0x40 | |
364 | #define ISCSI_FLAG_DATA_OVERFLOW 0x04 | |
365 | #define ISCSI_FLAG_DATA_UNDERFLOW 0x02 | |
366 | #define ISCSI_FLAG_DATA_STATUS 0x01 | |
367 | ||
368 | /* Text Header */ | |
369 | struct iscsi_text { | |
370 | uint8_t opcode; | |
371 | uint8_t flags; | |
372 | uint8_t rsvd2[2]; | |
373 | uint8_t hlength; | |
374 | uint8_t dlength[3]; | |
375 | uint8_t rsvd4[8]; | |
b4377356 | 376 | itt_t itt; |
39e84790 AA |
377 | __be32 ttt; |
378 | __be32 cmdsn; | |
379 | __be32 exp_statsn; | |
380 | uint8_t rsvd5[16]; | |
381 | /* Text - key=value pairs */ | |
382 | }; | |
383 | ||
384 | #define ISCSI_FLAG_TEXT_CONTINUE 0x40 | |
385 | ||
386 | /* Text Response Header */ | |
387 | struct iscsi_text_rsp { | |
388 | uint8_t opcode; | |
389 | uint8_t flags; | |
390 | uint8_t rsvd2[2]; | |
391 | uint8_t hlength; | |
392 | uint8_t dlength[3]; | |
393 | uint8_t rsvd4[8]; | |
b4377356 | 394 | itt_t itt; |
39e84790 AA |
395 | __be32 ttt; |
396 | __be32 statsn; | |
397 | __be32 exp_cmdsn; | |
398 | __be32 max_cmdsn; | |
399 | uint8_t rsvd5[12]; | |
400 | /* Text Response - key:value pairs */ | |
401 | }; | |
402 | ||
403 | /* Login Header */ | |
404 | struct iscsi_login { | |
405 | uint8_t opcode; | |
406 | uint8_t flags; | |
407 | uint8_t max_version; /* Max. version supported */ | |
408 | uint8_t min_version; /* Min. version supported */ | |
409 | uint8_t hlength; | |
410 | uint8_t dlength[3]; | |
411 | uint8_t isid[6]; /* Initiator Session ID */ | |
412 | __be16 tsih; /* Target Session Handle */ | |
b4377356 | 413 | itt_t itt; /* Initiator Task Tag */ |
39e84790 AA |
414 | __be16 cid; |
415 | __be16 rsvd3; | |
416 | __be32 cmdsn; | |
417 | __be32 exp_statsn; | |
418 | uint8_t rsvd5[16]; | |
419 | }; | |
420 | ||
421 | /* Login PDU flags */ | |
422 | #define ISCSI_FLAG_LOGIN_TRANSIT 0x80 | |
423 | #define ISCSI_FLAG_LOGIN_CONTINUE 0x40 | |
424 | #define ISCSI_FLAG_LOGIN_CURRENT_STAGE_MASK 0x0C /* 2 bits */ | |
425 | #define ISCSI_FLAG_LOGIN_NEXT_STAGE_MASK 0x03 /* 2 bits */ | |
426 | ||
427 | #define ISCSI_LOGIN_CURRENT_STAGE(flags) \ | |
428 | ((flags & ISCSI_FLAG_LOGIN_CURRENT_STAGE_MASK) >> 2) | |
429 | #define ISCSI_LOGIN_NEXT_STAGE(flags) \ | |
430 | (flags & ISCSI_FLAG_LOGIN_NEXT_STAGE_MASK) | |
431 | ||
432 | /* Login Response Header */ | |
433 | struct iscsi_login_rsp { | |
434 | uint8_t opcode; | |
435 | uint8_t flags; | |
436 | uint8_t max_version; /* Max. version supported */ | |
437 | uint8_t active_version; /* Active version */ | |
438 | uint8_t hlength; | |
439 | uint8_t dlength[3]; | |
440 | uint8_t isid[6]; /* Initiator Session ID */ | |
441 | __be16 tsih; /* Target Session Handle */ | |
b4377356 | 442 | itt_t itt; /* Initiator Task Tag */ |
39e84790 AA |
443 | __be32 rsvd3; |
444 | __be32 statsn; | |
445 | __be32 exp_cmdsn; | |
446 | __be32 max_cmdsn; | |
447 | uint8_t status_class; /* see Login RSP ststus classes below */ | |
448 | uint8_t status_detail; /* see Login RSP Status details below */ | |
449 | uint8_t rsvd4[10]; | |
450 | }; | |
451 | ||
452 | /* Login stage (phase) codes for CSG, NSG */ | |
453 | #define ISCSI_INITIAL_LOGIN_STAGE -1 | |
454 | #define ISCSI_SECURITY_NEGOTIATION_STAGE 0 | |
455 | #define ISCSI_OP_PARMS_NEGOTIATION_STAGE 1 | |
456 | #define ISCSI_FULL_FEATURE_PHASE 3 | |
457 | ||
458 | /* Login Status response classes */ | |
459 | #define ISCSI_STATUS_CLS_SUCCESS 0x00 | |
460 | #define ISCSI_STATUS_CLS_REDIRECT 0x01 | |
461 | #define ISCSI_STATUS_CLS_INITIATOR_ERR 0x02 | |
462 | #define ISCSI_STATUS_CLS_TARGET_ERR 0x03 | |
463 | ||
464 | /* Login Status response detail codes */ | |
465 | /* Class-0 (Success) */ | |
466 | #define ISCSI_LOGIN_STATUS_ACCEPT 0x00 | |
467 | ||
468 | /* Class-1 (Redirection) */ | |
469 | #define ISCSI_LOGIN_STATUS_TGT_MOVED_TEMP 0x01 | |
470 | #define ISCSI_LOGIN_STATUS_TGT_MOVED_PERM 0x02 | |
471 | ||
472 | /* Class-2 (Initiator Error) */ | |
473 | #define ISCSI_LOGIN_STATUS_INIT_ERR 0x00 | |
474 | #define ISCSI_LOGIN_STATUS_AUTH_FAILED 0x01 | |
475 | #define ISCSI_LOGIN_STATUS_TGT_FORBIDDEN 0x02 | |
476 | #define ISCSI_LOGIN_STATUS_TGT_NOT_FOUND 0x03 | |
477 | #define ISCSI_LOGIN_STATUS_TGT_REMOVED 0x04 | |
478 | #define ISCSI_LOGIN_STATUS_NO_VERSION 0x05 | |
479 | #define ISCSI_LOGIN_STATUS_ISID_ERROR 0x06 | |
480 | #define ISCSI_LOGIN_STATUS_MISSING_FIELDS 0x07 | |
481 | #define ISCSI_LOGIN_STATUS_CONN_ADD_FAILED 0x08 | |
482 | #define ISCSI_LOGIN_STATUS_NO_SESSION_TYPE 0x09 | |
483 | #define ISCSI_LOGIN_STATUS_NO_SESSION 0x0a | |
484 | #define ISCSI_LOGIN_STATUS_INVALID_REQUEST 0x0b | |
485 | ||
486 | /* Class-3 (Target Error) */ | |
487 | #define ISCSI_LOGIN_STATUS_TARGET_ERROR 0x00 | |
488 | #define ISCSI_LOGIN_STATUS_SVC_UNAVAILABLE 0x01 | |
489 | #define ISCSI_LOGIN_STATUS_NO_RESOURCES 0x02 | |
490 | ||
491 | /* Logout Header */ | |
492 | struct iscsi_logout { | |
493 | uint8_t opcode; | |
494 | uint8_t flags; | |
495 | uint8_t rsvd1[2]; | |
496 | uint8_t hlength; | |
497 | uint8_t dlength[3]; | |
498 | uint8_t rsvd2[8]; | |
b4377356 | 499 | itt_t itt; /* Initiator Task Tag */ |
39e84790 AA |
500 | __be16 cid; |
501 | uint8_t rsvd3[2]; | |
502 | __be32 cmdsn; | |
503 | __be32 exp_statsn; | |
504 | uint8_t rsvd4[16]; | |
505 | }; | |
506 | ||
507 | /* Logout PDU flags */ | |
508 | #define ISCSI_FLAG_LOGOUT_REASON_MASK 0x7F | |
509 | ||
510 | /* logout reason_code values */ | |
511 | ||
512 | #define ISCSI_LOGOUT_REASON_CLOSE_SESSION 0 | |
513 | #define ISCSI_LOGOUT_REASON_CLOSE_CONNECTION 1 | |
514 | #define ISCSI_LOGOUT_REASON_RECOVERY 2 | |
515 | #define ISCSI_LOGOUT_REASON_AEN_REQUEST 3 | |
516 | ||
517 | /* Logout Response Header */ | |
518 | struct iscsi_logout_rsp { | |
519 | uint8_t opcode; | |
520 | uint8_t flags; | |
521 | uint8_t response; /* see Logout response values below */ | |
522 | uint8_t rsvd2; | |
523 | uint8_t hlength; | |
524 | uint8_t dlength[3]; | |
525 | uint8_t rsvd3[8]; | |
b4377356 | 526 | itt_t itt; /* Initiator Task Tag */ |
39e84790 AA |
527 | __be32 rsvd4; |
528 | __be32 statsn; | |
529 | __be32 exp_cmdsn; | |
530 | __be32 max_cmdsn; | |
531 | __be32 rsvd5; | |
532 | __be16 t2wait; | |
533 | __be16 t2retain; | |
534 | __be32 rsvd6; | |
535 | }; | |
536 | ||
537 | /* logout response status values */ | |
538 | ||
539 | #define ISCSI_LOGOUT_SUCCESS 0 | |
540 | #define ISCSI_LOGOUT_CID_NOT_FOUND 1 | |
541 | #define ISCSI_LOGOUT_RECOVERY_UNSUPPORTED 2 | |
542 | #define ISCSI_LOGOUT_CLEANUP_FAILED 3 | |
543 | ||
544 | /* SNACK Header */ | |
545 | struct iscsi_snack { | |
546 | uint8_t opcode; | |
547 | uint8_t flags; | |
548 | uint8_t rsvd2[14]; | |
b4377356 | 549 | itt_t itt; |
39e84790 AA |
550 | __be32 begrun; |
551 | __be32 runlength; | |
552 | __be32 exp_statsn; | |
553 | __be32 rsvd3; | |
554 | __be32 exp_datasn; | |
555 | uint8_t rsvd6[8]; | |
556 | }; | |
557 | ||
558 | /* SNACK PDU flags */ | |
559 | #define ISCSI_FLAG_SNACK_TYPE_MASK 0x0F /* 4 bits */ | |
560 | ||
561 | /* Reject Message Header */ | |
562 | struct iscsi_reject { | |
563 | uint8_t opcode; | |
564 | uint8_t flags; | |
565 | uint8_t reason; | |
566 | uint8_t rsvd2; | |
fa0a6957 | 567 | uint8_t hlength; |
39e84790 | 568 | uint8_t dlength[3]; |
fa0a6957 MC |
569 | uint8_t rsvd3[8]; |
570 | __be32 ffffffff; | |
571 | uint8_t rsvd4[4]; | |
39e84790 AA |
572 | __be32 statsn; |
573 | __be32 exp_cmdsn; | |
574 | __be32 max_cmdsn; | |
575 | __be32 datasn; | |
576 | uint8_t rsvd5[8]; | |
577 | /* Text - Rejected hdr */ | |
578 | }; | |
579 | ||
580 | /* Reason for Reject */ | |
fa0a6957 MC |
581 | #define ISCSI_REASON_CMD_BEFORE_LOGIN 1 |
582 | #define ISCSI_REASON_DATA_DIGEST_ERROR 2 | |
583 | #define ISCSI_REASON_DATA_SNACK_REJECT 3 | |
584 | #define ISCSI_REASON_PROTOCOL_ERROR 4 | |
585 | #define ISCSI_REASON_CMD_NOT_SUPPORTED 5 | |
586 | #define ISCSI_REASON_IMM_CMD_REJECT 6 | |
587 | #define ISCSI_REASON_TASK_IN_PROGRESS 7 | |
588 | #define ISCSI_REASON_INVALID_SNACK 8 | |
589 | #define ISCSI_REASON_BOOKMARK_INVALID 9 | |
590 | #define ISCSI_REASON_BOOKMARK_NO_RESOURCES 10 | |
591 | #define ISCSI_REASON_NEGOTIATION_RESET 11 | |
39e84790 AA |
592 | |
593 | /* Max. number of Key=Value pairs in a text message */ | |
594 | #define MAX_KEY_VALUE_PAIRS 8192 | |
595 | ||
596 | /* maximum length for text keys/values */ | |
597 | #define KEY_MAXLEN 64 | |
598 | #define VALUE_MAXLEN 255 | |
599 | #define TARGET_NAME_MAXLEN VALUE_MAXLEN | |
600 | ||
bf32ed33 MC |
601 | #define ISCSI_DEF_MAX_RECV_SEG_LEN 8192 |
602 | #define ISCSI_MIN_MAX_RECV_SEG_LEN 512 | |
603 | #define ISCSI_MAX_MAX_RECV_SEG_LEN 16777215 | |
604 | ||
605 | #define ISCSI_DEF_FIRST_BURST_LEN 65536 | |
606 | #define ISCSI_MIN_FIRST_BURST_LEN 512 | |
607 | #define ISCSI_MAX_FIRST_BURST_LEN 16777215 | |
608 | ||
609 | #define ISCSI_DEF_MAX_BURST_LEN 262144 | |
610 | #define ISCSI_MIN_MAX_BURST_LEN 512 | |
611 | #define ISCSI_MAX_MAX_BURST_LEN 16777215 | |
39e84790 | 612 | |
843c0a8a MC |
613 | #define ISCSI_DEF_TIME2WAIT 2 |
614 | ||
39e84790 AA |
615 | /************************* RFC 3720 End *****************************/ |
616 | ||
617 | #endif /* ISCSI_PROTO_H */ |