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/* iSCSI header length */
33#define ISCSI_HDR_LEN 48
34
35/* iSCSI CRC32C length */
36#define ISCSI_CRC_LEN 4
37
38/* Padding word length */
39#define ISCSI_PAD_LEN 4
40
41/*
42 * Serial Number Arithmetic, 32 bits, RFC1982
43 */
44
45static inline int iscsi_sna_lt(u32 n1, u32 n2)
46{
47 return (s32)(n1 - n2) < 0;
48}
49
50static inline int iscsi_sna_lte(u32 n1, u32 n2)
51{
52 return (s32)(n1 - n2) <= 0;
53}
54
55static inline int iscsi_sna_gt(u32 n1, u32 n2)
56{
57 return (s32)(n1 - n2) > 0;
58}
59
60static inline int iscsi_sna_gte(u32 n1, u32 n2)
61{
62 return (s32)(n1 - n2) >= 0;
63}
64
65/*
66 * useful common(control and data pathes) macro
67 */
68#define ntoh24(p) (((p)[0] << 16) | ((p)[1] << 8) | ((p)[2]))
69#define hton24(p, v) { \
70 p[0] = (((v) >> 16) & 0xFF); \
71 p[1] = (((v) >> 8) & 0xFF); \
72 p[2] = ((v) & 0xFF); \
73}
74#define zero_data(p) {p[0]=0;p[1]=0;p[2]=0;}
75
76/* initiator tags; opaque for target */
77typedef uint32_t __bitwise itt_t;
78/* below makes sense only for initiator that created this tag */
79#define build_itt(itt, age) ((__force itt_t)\
80 ((itt) | ((age) << ISCSI_AGE_SHIFT)))
81#define get_itt(itt) ((__force uint32_t)(itt_t)(itt) & ISCSI_ITT_MASK)
82#define RESERVED_ITT ((__force itt_t)0xffffffff)
83
84/*
85 * iSCSI Template Message Header
86 */
87struct iscsi_hdr {
88 uint8_t opcode;
89 uint8_t flags; /* Final bit */
90 uint8_t rsvd2[2];
91 uint8_t hlength; /* AHSs total length */
92 uint8_t dlength[3]; /* Data length */
93 struct scsi_lun lun;
94 itt_t itt; /* Initiator Task Tag, opaque for target */
95 __be32 ttt; /* Target Task Tag */
96 __be32 statsn;
97 __be32 exp_statsn;
98 __be32 max_statsn;
99 uint8_t other[12];
100};
101
102/************************* RFC 3720 Begin *****************************/
103
104#define ISCSI_RESERVED_TAG 0xffffffff
105
106/* Opcode encoding bits */
107#define ISCSI_OP_RETRY 0x80
108#define ISCSI_OP_IMMEDIATE 0x40
109#define ISCSI_OPCODE_MASK 0x3F
110
111/* Initiator Opcode values */
112#define ISCSI_OP_NOOP_OUT 0x00
113#define ISCSI_OP_SCSI_CMD 0x01
114#define ISCSI_OP_SCSI_TMFUNC 0x02
115#define ISCSI_OP_LOGIN 0x03
116#define ISCSI_OP_TEXT 0x04
117#define ISCSI_OP_SCSI_DATA_OUT 0x05
118#define ISCSI_OP_LOGOUT 0x06
119#define ISCSI_OP_SNACK 0x10
120
121#define ISCSI_OP_VENDOR1_CMD 0x1c
122#define ISCSI_OP_VENDOR2_CMD 0x1d
123#define ISCSI_OP_VENDOR3_CMD 0x1e
124#define ISCSI_OP_VENDOR4_CMD 0x1f
125
126/* Target Opcode values */
127#define ISCSI_OP_NOOP_IN 0x20
128#define ISCSI_OP_SCSI_CMD_RSP 0x21
129#define ISCSI_OP_SCSI_TMFUNC_RSP 0x22
130#define ISCSI_OP_LOGIN_RSP 0x23
131#define ISCSI_OP_TEXT_RSP 0x24
132#define ISCSI_OP_SCSI_DATA_IN 0x25
133#define ISCSI_OP_LOGOUT_RSP 0x26
134#define ISCSI_OP_R2T 0x31
135#define ISCSI_OP_ASYNC_EVENT 0x32
136#define ISCSI_OP_REJECT 0x3f
137
138struct iscsi_ahs_hdr {
139 __be16 ahslength;
140 uint8_t ahstype;
141 uint8_t ahspec[5];
142};
143
144#define ISCSI_AHSTYPE_CDB 1
145#define ISCSI_AHSTYPE_RLENGTH 2
146#define ISCSI_CDB_SIZE 16
147
148/* iSCSI PDU Header */
149struct iscsi_scsi_req {
150 uint8_t opcode;
151 uint8_t flags;
152 __be16 rsvd2;
153 uint8_t hlength;
154 uint8_t dlength[3];
155 struct scsi_lun lun;
156 itt_t itt; /* Initiator Task Tag */
157 __be32 data_length;
158 __be32 cmdsn;
159 __be32 exp_statsn;
160 uint8_t cdb[ISCSI_CDB_SIZE]; /* SCSI Command Block */
161 /* Additional Data (Command Dependent) */
162};
163
164/* Command PDU flags */
165#define ISCSI_FLAG_CMD_FINAL 0x80
166#define ISCSI_FLAG_CMD_READ 0x40
167#define ISCSI_FLAG_CMD_WRITE 0x20
168#define ISCSI_FLAG_CMD_ATTR_MASK 0x07 /* 3 bits */
169
170/* SCSI Command Attribute values */
171#define ISCSI_ATTR_UNTAGGED 0
172#define ISCSI_ATTR_SIMPLE 1
173#define ISCSI_ATTR_ORDERED 2
174#define ISCSI_ATTR_HEAD_OF_QUEUE 3
175#define ISCSI_ATTR_ACA 4
176
177struct iscsi_rlength_ahdr {
178 __be16 ahslength;
179 uint8_t ahstype;
180 uint8_t reserved;
181 __be32 read_length;
182};
183
184/* Extended CDB AHS */
185struct iscsi_ecdb_ahdr {
186 __be16 ahslength; /* CDB length - 15, including reserved byte */
187 uint8_t ahstype;
188 uint8_t reserved;
189 /* 4-byte aligned extended CDB spillover */
190 uint8_t ecdb[SCSI_MAX_VARLEN_CDB_SIZE - ISCSI_CDB_SIZE];
191};
192
193/* SCSI Response Header */
194struct iscsi_scsi_rsp {
195 uint8_t opcode;
196 uint8_t flags;
197 uint8_t response;
198 uint8_t cmd_status;
199 uint8_t hlength;
200 uint8_t dlength[3];
201 uint8_t rsvd[8];
202 itt_t itt; /* Initiator Task Tag */
203 __be32 rsvd1;
204 __be32 statsn;
205 __be32 exp_cmdsn;
206 __be32 max_cmdsn;
207 __be32 exp_datasn;
208 __be32 bi_residual_count;
209 __be32 residual_count;
210 /* Response or Sense Data (optional) */
211};
212
213/* Command Response PDU flags */
214#define ISCSI_FLAG_CMD_BIDI_OVERFLOW 0x10
215#define ISCSI_FLAG_CMD_BIDI_UNDERFLOW 0x08
216#define ISCSI_FLAG_CMD_OVERFLOW 0x04
217#define ISCSI_FLAG_CMD_UNDERFLOW 0x02
218
219/* iSCSI Status values. Valid if Rsp Selector bit is not set */
220#define ISCSI_STATUS_CMD_COMPLETED 0
221#define ISCSI_STATUS_TARGET_FAILURE 1
222#define ISCSI_STATUS_SUBSYS_FAILURE 2
223
224/* Asynchronous Event Header */
225struct iscsi_async {
226 uint8_t opcode;
227 uint8_t flags;
228 uint8_t rsvd2[2];
229 uint8_t rsvd3;
230 uint8_t dlength[3];
231 struct scsi_lun lun;
232 uint8_t rsvd4[8];
233 __be32 statsn;
234 __be32 exp_cmdsn;
235 __be32 max_cmdsn;
236 uint8_t async_event;
237 uint8_t async_vcode;
238 __be16 param1;
239 __be16 param2;
240 __be16 param3;
241 uint8_t rsvd5[4];
242};
243
244/* iSCSI Event Codes */
245#define ISCSI_ASYNC_MSG_SCSI_EVENT 0
246#define ISCSI_ASYNC_MSG_REQUEST_LOGOUT 1
247#define ISCSI_ASYNC_MSG_DROPPING_CONNECTION 2
248#define ISCSI_ASYNC_MSG_DROPPING_ALL_CONNECTIONS 3
249#define ISCSI_ASYNC_MSG_PARAM_NEGOTIATION 4
250#define ISCSI_ASYNC_MSG_VENDOR_SPECIFIC 255
251
252/* NOP-Out Message */
253struct iscsi_nopout {
254 uint8_t opcode;
255 uint8_t flags;
256 __be16 rsvd2;
257 uint8_t rsvd3;
258 uint8_t dlength[3];
259 struct scsi_lun lun;
260 itt_t itt; /* Initiator Task Tag */
261 __be32 ttt; /* Target Transfer Tag */
262 __be32 cmdsn;
263 __be32 exp_statsn;
264 uint8_t rsvd4[16];
265};
266
267/* NOP-In Message */
268struct iscsi_nopin {
269 uint8_t opcode;
270 uint8_t flags;
271 __be16 rsvd2;
272 uint8_t rsvd3;
273 uint8_t dlength[3];
274 struct scsi_lun lun;
275 itt_t itt; /* Initiator Task Tag */
276 __be32 ttt; /* Target Transfer Tag */
277 __be32 statsn;
278 __be32 exp_cmdsn;
279 __be32 max_cmdsn;
280 uint8_t rsvd4[12];
281};
282
283/* SCSI Task Management Message Header */
284struct iscsi_tm {
285 uint8_t opcode;
286 uint8_t flags;
287 uint8_t rsvd1[2];
288 uint8_t hlength;
289 uint8_t dlength[3];
290 struct scsi_lun lun;
291 itt_t itt; /* Initiator Task Tag */
292 itt_t rtt; /* Reference Task Tag */
293 __be32 cmdsn;
294 __be32 exp_statsn;
295 __be32 refcmdsn;
296 __be32 exp_datasn;
297 uint8_t rsvd2[8];
298};
299
300#define ISCSI_FLAG_TM_FUNC_MASK 0x7F
301
302/* Function values */
303#define ISCSI_TM_FUNC_ABORT_TASK 1
304#define ISCSI_TM_FUNC_ABORT_TASK_SET 2
305#define ISCSI_TM_FUNC_CLEAR_ACA 3
306#define ISCSI_TM_FUNC_CLEAR_TASK_SET 4
307#define ISCSI_TM_FUNC_LOGICAL_UNIT_RESET 5
308#define ISCSI_TM_FUNC_TARGET_WARM_RESET 6
309#define ISCSI_TM_FUNC_TARGET_COLD_RESET 7
310#define ISCSI_TM_FUNC_TASK_REASSIGN 8
311
312#define ISCSI_TM_FUNC_VALUE(hdr) ((hdr)->flags & ISCSI_FLAG_TM_FUNC_MASK)
313
314/* SCSI Task Management Response Header */
315struct iscsi_tm_rsp {
316 uint8_t opcode;
317 uint8_t flags;
318 uint8_t response; /* see Response values below */
319 uint8_t qualifier;
320 uint8_t hlength;
321 uint8_t dlength[3];
322 uint8_t rsvd2[8];
323 itt_t itt; /* Initiator Task Tag */
324 itt_t rtt; /* Reference Task Tag */
325 __be32 statsn;
326 __be32 exp_cmdsn;
327 __be32 max_cmdsn;
328 uint8_t rsvd3[12];
329};
330
331/* Response values */
332#define ISCSI_TMF_RSP_COMPLETE 0x00
333#define ISCSI_TMF_RSP_NO_TASK 0x01
334#define ISCSI_TMF_RSP_NO_LUN 0x02
335#define ISCSI_TMF_RSP_TASK_ALLEGIANT 0x03
336#define ISCSI_TMF_RSP_NO_FAILOVER 0x04
337#define ISCSI_TMF_RSP_NOT_SUPPORTED 0x05
338#define ISCSI_TMF_RSP_AUTH_FAILED 0x06
339#define ISCSI_TMF_RSP_REJECTED 0xff
340
341/* Ready To Transfer Header */
342struct iscsi_r2t_rsp {
343 uint8_t opcode;
344 uint8_t flags;
345 uint8_t rsvd2[2];
346 uint8_t hlength;
347 uint8_t dlength[3];
348 struct scsi_lun lun;
349 itt_t itt; /* Initiator Task Tag */
350 __be32 ttt; /* Target Transfer Tag */
351 __be32 statsn;
352 __be32 exp_cmdsn;
353 __be32 max_cmdsn;
354 __be32 r2tsn;
355 __be32 data_offset;
356 __be32 data_length;
357};
358
359/* SCSI Data Hdr */
360struct iscsi_data {
361 uint8_t opcode;
362 uint8_t flags;
363 uint8_t rsvd2[2];
364 uint8_t rsvd3;
365 uint8_t dlength[3];
366 struct scsi_lun lun;
367 itt_t itt;
368 __be32 ttt;
369 __be32 rsvd4;
370 __be32 exp_statsn;
371 __be32 rsvd5;
372 __be32 datasn;
373 __be32 offset;
374 __be32 rsvd6;
375 /* Payload */
376};
377
378/* SCSI Data Response Hdr */
379struct iscsi_data_rsp {
380 uint8_t opcode;
381 uint8_t flags;
382 uint8_t rsvd2;
383 uint8_t cmd_status;
384 uint8_t hlength;
385 uint8_t dlength[3];
386 struct scsi_lun lun;
387 itt_t itt;
388 __be32 ttt;
389 __be32 statsn;
390 __be32 exp_cmdsn;
391 __be32 max_cmdsn;
392 __be32 datasn;
393 __be32 offset;
394 __be32 residual_count;
395};
396
397/* Data Response PDU flags */
398#define ISCSI_FLAG_DATA_ACK 0x40
399#define ISCSI_FLAG_DATA_OVERFLOW 0x04
400#define ISCSI_FLAG_DATA_UNDERFLOW 0x02
401#define ISCSI_FLAG_DATA_STATUS 0x01
402
403/* Text Header */
404struct iscsi_text {
405 uint8_t opcode;
406 uint8_t flags;
407 uint8_t rsvd2[2];
408 uint8_t hlength;
409 uint8_t dlength[3];
410 uint8_t rsvd4[8];
411 itt_t itt;
412 __be32 ttt;
413 __be32 cmdsn;
414 __be32 exp_statsn;
415 uint8_t rsvd5[16];
416 /* Text - key=value pairs */
417};
418
419#define ISCSI_FLAG_TEXT_CONTINUE 0x40
420
421/* Text Response Header */
422struct iscsi_text_rsp {
423 uint8_t opcode;
424 uint8_t flags;
425 uint8_t rsvd2[2];
426 uint8_t hlength;
427 uint8_t dlength[3];
428 uint8_t rsvd4[8];
429 itt_t itt;
430 __be32 ttt;
431 __be32 statsn;
432 __be32 exp_cmdsn;
433 __be32 max_cmdsn;
434 uint8_t rsvd5[12];
435 /* Text Response - key:value pairs */
436};
437
438/* Login Header */
439struct iscsi_login_req {
440 uint8_t opcode;
441 uint8_t flags;
442 uint8_t max_version; /* Max. version supported */
443 uint8_t min_version; /* Min. version supported */
444 uint8_t hlength;
445 uint8_t dlength[3];
446 uint8_t isid[6]; /* Initiator Session ID */
447 __be16 tsih; /* Target Session Handle */
448 itt_t itt; /* Initiator Task Tag */
449 __be16 cid;
450 __be16 rsvd3;
451 __be32 cmdsn;
452 __be32 exp_statsn;
453 uint8_t rsvd5[16];
454};
455
456/* Login PDU flags */
457#define ISCSI_FLAG_LOGIN_TRANSIT 0x80
458#define ISCSI_FLAG_LOGIN_CONTINUE 0x40
459#define ISCSI_FLAG_LOGIN_CURRENT_STAGE_MASK 0x0C /* 2 bits */
460#define ISCSI_FLAG_LOGIN_CURRENT_STAGE1 0x04
461#define ISCSI_FLAG_LOGIN_CURRENT_STAGE2 0x08
462#define ISCSI_FLAG_LOGIN_CURRENT_STAGE3 0x0C
463#define ISCSI_FLAG_LOGIN_NEXT_STAGE_MASK 0x03 /* 2 bits */
464#define ISCSI_FLAG_LOGIN_NEXT_STAGE1 0x01
465#define ISCSI_FLAG_LOGIN_NEXT_STAGE2 0x02
466#define ISCSI_FLAG_LOGIN_NEXT_STAGE3 0x03
467
468#define ISCSI_LOGIN_CURRENT_STAGE(flags) \
469 ((flags & ISCSI_FLAG_LOGIN_CURRENT_STAGE_MASK) >> 2)
470#define ISCSI_LOGIN_NEXT_STAGE(flags) \
471 (flags & ISCSI_FLAG_LOGIN_NEXT_STAGE_MASK)
472
473/* Login Response Header */
474struct iscsi_login_rsp {
475 uint8_t opcode;
476 uint8_t flags;
477 uint8_t max_version; /* Max. version supported */
478 uint8_t active_version; /* Active version */
479 uint8_t hlength;
480 uint8_t dlength[3];
481 uint8_t isid[6]; /* Initiator Session ID */
482 __be16 tsih; /* Target Session Handle */
483 itt_t itt; /* Initiator Task Tag */
484 __be32 rsvd3;
485 __be32 statsn;
486 __be32 exp_cmdsn;
487 __be32 max_cmdsn;
488 uint8_t status_class; /* see Login RSP ststus classes below */
489 uint8_t status_detail; /* see Login RSP Status details below */
490 uint8_t rsvd4[10];
491};
492
493/* Login stage (phase) codes for CSG, NSG */
494#define ISCSI_INITIAL_LOGIN_STAGE -1
495#define ISCSI_SECURITY_NEGOTIATION_STAGE 0
496#define ISCSI_OP_PARMS_NEGOTIATION_STAGE 1
497#define ISCSI_FULL_FEATURE_PHASE 3
498
499/* Login Status response classes */
500#define ISCSI_STATUS_CLS_SUCCESS 0x00
501#define ISCSI_STATUS_CLS_REDIRECT 0x01
502#define ISCSI_STATUS_CLS_INITIATOR_ERR 0x02
503#define ISCSI_STATUS_CLS_TARGET_ERR 0x03
504
505/* Login Status response detail codes */
506/* Class-0 (Success) */
507#define ISCSI_LOGIN_STATUS_ACCEPT 0x00
508
509/* Class-1 (Redirection) */
510#define ISCSI_LOGIN_STATUS_TGT_MOVED_TEMP 0x01
511#define ISCSI_LOGIN_STATUS_TGT_MOVED_PERM 0x02
512
513/* Class-2 (Initiator Error) */
514#define ISCSI_LOGIN_STATUS_INIT_ERR 0x00
515#define ISCSI_LOGIN_STATUS_AUTH_FAILED 0x01
516#define ISCSI_LOGIN_STATUS_TGT_FORBIDDEN 0x02
517#define ISCSI_LOGIN_STATUS_TGT_NOT_FOUND 0x03
518#define ISCSI_LOGIN_STATUS_TGT_REMOVED 0x04
519#define ISCSI_LOGIN_STATUS_NO_VERSION 0x05
520#define ISCSI_LOGIN_STATUS_ISID_ERROR 0x06
521#define ISCSI_LOGIN_STATUS_MISSING_FIELDS 0x07
522#define ISCSI_LOGIN_STATUS_CONN_ADD_FAILED 0x08
523#define ISCSI_LOGIN_STATUS_NO_SESSION_TYPE 0x09
524#define ISCSI_LOGIN_STATUS_NO_SESSION 0x0a
525#define ISCSI_LOGIN_STATUS_INVALID_REQUEST 0x0b
526
527/* Class-3 (Target Error) */
528#define ISCSI_LOGIN_STATUS_TARGET_ERROR 0x00
529#define ISCSI_LOGIN_STATUS_SVC_UNAVAILABLE 0x01
530#define ISCSI_LOGIN_STATUS_NO_RESOURCES 0x02
531
532/* Logout Header */
533struct iscsi_logout {
534 uint8_t opcode;
535 uint8_t flags;
536 uint8_t rsvd1[2];
537 uint8_t hlength;
538 uint8_t dlength[3];
539 uint8_t rsvd2[8];
540 itt_t itt; /* Initiator Task Tag */
541 __be16 cid;
542 uint8_t rsvd3[2];
543 __be32 cmdsn;
544 __be32 exp_statsn;
545 uint8_t rsvd4[16];
546};
547
548/* Logout PDU flags */
549#define ISCSI_FLAG_LOGOUT_REASON_MASK 0x7F
550
551/* logout reason_code values */
552
553#define ISCSI_LOGOUT_REASON_CLOSE_SESSION 0
554#define ISCSI_LOGOUT_REASON_CLOSE_CONNECTION 1
555#define ISCSI_LOGOUT_REASON_RECOVERY 2
556#define ISCSI_LOGOUT_REASON_AEN_REQUEST 3
557
558/* Logout Response Header */
559struct iscsi_logout_rsp {
560 uint8_t opcode;
561 uint8_t flags;
562 uint8_t response; /* see Logout response values below */
563 uint8_t rsvd2;
564 uint8_t hlength;
565 uint8_t dlength[3];
566 uint8_t rsvd3[8];
567 itt_t itt; /* Initiator Task Tag */
568 __be32 rsvd4;
569 __be32 statsn;
570 __be32 exp_cmdsn;
571 __be32 max_cmdsn;
572 __be32 rsvd5;
573 __be16 t2wait;
574 __be16 t2retain;
575 __be32 rsvd6;
576};
577
578/* logout response status values */
579
580#define ISCSI_LOGOUT_SUCCESS 0
581#define ISCSI_LOGOUT_CID_NOT_FOUND 1
582#define ISCSI_LOGOUT_RECOVERY_UNSUPPORTED 2
583#define ISCSI_LOGOUT_CLEANUP_FAILED 3
584
585/* SNACK Header */
586struct iscsi_snack {
587 uint8_t opcode;
588 uint8_t flags;
589 uint8_t rsvd2[2];
590 uint8_t hlength;
591 uint8_t dlength[3];
592 uint8_t lun[8];
593 itt_t itt;
594 __be32 ttt;
595 uint8_t rsvd3[4];
596 __be32 exp_statsn;
597 uint8_t rsvd4[8];
598 __be32 begrun;
599 __be32 runlength;
600};
601
602/* SNACK PDU flags */
603#define ISCSI_FLAG_SNACK_TYPE_DATA 0
604#define ISCSI_FLAG_SNACK_TYPE_R2T 0
605#define ISCSI_FLAG_SNACK_TYPE_STATUS 1
606#define ISCSI_FLAG_SNACK_TYPE_DATA_ACK 2
607#define ISCSI_FLAG_SNACK_TYPE_RDATA 3
608#define ISCSI_FLAG_SNACK_TYPE_MASK 0x0F /* 4 bits */
609
610/* Reject Message Header */
611struct iscsi_reject {
612 uint8_t opcode;
613 uint8_t flags;
614 uint8_t reason;
615 uint8_t rsvd2;
616 uint8_t hlength;
617 uint8_t dlength[3];
618 uint8_t rsvd3[8];
619 __be32 ffffffff;
620 uint8_t rsvd4[4];
621 __be32 statsn;
622 __be32 exp_cmdsn;
623 __be32 max_cmdsn;
624 __be32 datasn;
625 uint8_t rsvd5[8];
626 /* Text - Rejected hdr */
627};
628
629/* Reason for Reject */
630#define ISCSI_REASON_CMD_BEFORE_LOGIN 1
631#define ISCSI_REASON_DATA_DIGEST_ERROR 2
632#define ISCSI_REASON_DATA_SNACK_REJECT 3
633#define ISCSI_REASON_PROTOCOL_ERROR 4
634#define ISCSI_REASON_CMD_NOT_SUPPORTED 5
635#define ISCSI_REASON_IMM_CMD_REJECT 6
636#define ISCSI_REASON_TASK_IN_PROGRESS 7
637#define ISCSI_REASON_INVALID_SNACK 8
638#define ISCSI_REASON_BOOKMARK_INVALID 9
639#define ISCSI_REASON_BOOKMARK_NO_RESOURCES 10
640#define ISCSI_REASON_NEGOTIATION_RESET 11
641
642/* Max. number of Key=Value pairs in a text message */
643#define MAX_KEY_VALUE_PAIRS 8192
644
645/* maximum length for text keys/values */
646#define KEY_MAXLEN 64
647#define VALUE_MAXLEN 255
648#define TARGET_NAME_MAXLEN VALUE_MAXLEN
649
650#define ISCSI_DEF_MAX_RECV_SEG_LEN 8192
651#define ISCSI_MIN_MAX_RECV_SEG_LEN 512
652#define ISCSI_MAX_MAX_RECV_SEG_LEN 16777215
653
654#define ISCSI_DEF_FIRST_BURST_LEN 65536
655#define ISCSI_MIN_FIRST_BURST_LEN 512
656#define ISCSI_MAX_FIRST_BURST_LEN 16777215
657
658#define ISCSI_DEF_MAX_BURST_LEN 262144
659#define ISCSI_MIN_MAX_BURST_LEN 512
660#define ISCSI_MAX_MAX_BURST_LEN 16777215
661
662#define ISCSI_DEF_TIME2WAIT 2
663
664#define ISCSI_NAME_LEN 224
665
666/************************* RFC 3720 End *****************************/
667
668#endif /* ISCSI_PROTO_H */
669