1 /*******************************************************************************
2 * This file contains main functions related to iSCSI Parameter negotiation.
3 *
4 * (c) Copyright 2007-2013 Datera, Inc.
5 *
6 * Author: Nicholas A. Bellinger <nab@linux-iscsi.org>
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 by
10 * 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,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
17 ******************************************************************************/
18
19 #include <linux/slab.h>
20
21 #include <target/iscsi/iscsi_target_core.h>
22 #include "iscsi_target_util.h"
23 #include "iscsi_target_parameters.h"
24
iscsi_login_rx_data(struct iscsi_conn * conn,char * buf,int length)25 int iscsi_login_rx_data(
26 struct iscsi_conn *conn,
27 char *buf,
28 int length)
29 {
30 int rx_got;
31 struct kvec iov;
32
33 memset(&iov, 0, sizeof(struct kvec));
34 iov.iov_len = length;
35 iov.iov_base = buf;
36
37 rx_got = rx_data(conn, &iov, 1, length);
38 if (rx_got != length) {
39 pr_err("rx_data returned %d, expecting %d.\n",
40 rx_got, length);
41 return -1;
42 }
43
44 return 0 ;
45 }
46
iscsi_login_tx_data(struct iscsi_conn * conn,char * pdu_buf,char * text_buf,int text_length)47 int iscsi_login_tx_data(
48 struct iscsi_conn *conn,
49 char *pdu_buf,
50 char *text_buf,
51 int text_length)
52 {
53 int length, tx_sent, iov_cnt = 1;
54 struct kvec iov[2];
55
56 length = (ISCSI_HDR_LEN + text_length);
57
58 memset(&iov[0], 0, 2 * sizeof(struct kvec));
59 iov[0].iov_len = ISCSI_HDR_LEN;
60 iov[0].iov_base = pdu_buf;
61
62 if (text_buf && text_length) {
63 iov[1].iov_len = text_length;
64 iov[1].iov_base = text_buf;
65 iov_cnt++;
66 }
67
68 tx_sent = tx_data(conn, &iov[0], iov_cnt, length);
69 if (tx_sent != length) {
70 pr_err("tx_data returned %d, expecting %d.\n",
71 tx_sent, length);
72 return -1;
73 }
74
75 return 0;
76 }
77
iscsi_dump_conn_ops(struct iscsi_conn_ops * conn_ops)78 void iscsi_dump_conn_ops(struct iscsi_conn_ops *conn_ops)
79 {
80 pr_debug("HeaderDigest: %s\n", (conn_ops->HeaderDigest) ?
81 "CRC32C" : "None");
82 pr_debug("DataDigest: %s\n", (conn_ops->DataDigest) ?
83 "CRC32C" : "None");
84 pr_debug("MaxRecvDataSegmentLength: %u\n",
85 conn_ops->MaxRecvDataSegmentLength);
86 }
87
iscsi_dump_sess_ops(struct iscsi_sess_ops * sess_ops)88 void iscsi_dump_sess_ops(struct iscsi_sess_ops *sess_ops)
89 {
90 pr_debug("InitiatorName: %s\n", sess_ops->InitiatorName);
91 pr_debug("InitiatorAlias: %s\n", sess_ops->InitiatorAlias);
92 pr_debug("TargetName: %s\n", sess_ops->TargetName);
93 pr_debug("TargetAlias: %s\n", sess_ops->TargetAlias);
94 pr_debug("TargetPortalGroupTag: %hu\n",
95 sess_ops->TargetPortalGroupTag);
96 pr_debug("MaxConnections: %hu\n", sess_ops->MaxConnections);
97 pr_debug("InitialR2T: %s\n",
98 (sess_ops->InitialR2T) ? "Yes" : "No");
99 pr_debug("ImmediateData: %s\n", (sess_ops->ImmediateData) ?
100 "Yes" : "No");
101 pr_debug("MaxBurstLength: %u\n", sess_ops->MaxBurstLength);
102 pr_debug("FirstBurstLength: %u\n", sess_ops->FirstBurstLength);
103 pr_debug("DefaultTime2Wait: %hu\n", sess_ops->DefaultTime2Wait);
104 pr_debug("DefaultTime2Retain: %hu\n",
105 sess_ops->DefaultTime2Retain);
106 pr_debug("MaxOutstandingR2T: %hu\n",
107 sess_ops->MaxOutstandingR2T);
108 pr_debug("DataPDUInOrder: %s\n",
109 (sess_ops->DataPDUInOrder) ? "Yes" : "No");
110 pr_debug("DataSequenceInOrder: %s\n",
111 (sess_ops->DataSequenceInOrder) ? "Yes" : "No");
112 pr_debug("ErrorRecoveryLevel: %hu\n",
113 sess_ops->ErrorRecoveryLevel);
114 pr_debug("SessionType: %s\n", (sess_ops->SessionType) ?
115 "Discovery" : "Normal");
116 }
117
iscsi_print_params(struct iscsi_param_list * param_list)118 void iscsi_print_params(struct iscsi_param_list *param_list)
119 {
120 struct iscsi_param *param;
121
122 list_for_each_entry(param, ¶m_list->param_list, p_list)
123 pr_debug("%s: %s\n", param->name, param->value);
124 }
125
iscsi_set_default_param(struct iscsi_param_list * param_list,char * name,char * value,u8 phase,u8 scope,u8 sender,u16 type_range,u8 use)126 static struct iscsi_param *iscsi_set_default_param(struct iscsi_param_list *param_list,
127 char *name, char *value, u8 phase, u8 scope, u8 sender,
128 u16 type_range, u8 use)
129 {
130 struct iscsi_param *param = NULL;
131
132 param = kzalloc(sizeof(struct iscsi_param), GFP_KERNEL);
133 if (!param) {
134 pr_err("Unable to allocate memory for parameter.\n");
135 goto out;
136 }
137 INIT_LIST_HEAD(¶m->p_list);
138
139 param->name = kstrdup(name, GFP_KERNEL);
140 if (!param->name) {
141 pr_err("Unable to allocate memory for parameter name.\n");
142 goto out;
143 }
144
145 param->value = kstrdup(value, GFP_KERNEL);
146 if (!param->value) {
147 pr_err("Unable to allocate memory for parameter value.\n");
148 goto out;
149 }
150
151 param->phase = phase;
152 param->scope = scope;
153 param->sender = sender;
154 param->use = use;
155 param->type_range = type_range;
156
157 switch (param->type_range) {
158 case TYPERANGE_BOOL_AND:
159 param->type = TYPE_BOOL_AND;
160 break;
161 case TYPERANGE_BOOL_OR:
162 param->type = TYPE_BOOL_OR;
163 break;
164 case TYPERANGE_0_TO_2:
165 case TYPERANGE_0_TO_3600:
166 case TYPERANGE_0_TO_32767:
167 case TYPERANGE_0_TO_65535:
168 case TYPERANGE_1_TO_65535:
169 case TYPERANGE_2_TO_3600:
170 case TYPERANGE_512_TO_16777215:
171 param->type = TYPE_NUMBER;
172 break;
173 case TYPERANGE_AUTH:
174 case TYPERANGE_DIGEST:
175 param->type = TYPE_VALUE_LIST | TYPE_STRING;
176 break;
177 case TYPERANGE_ISCSINAME:
178 case TYPERANGE_SESSIONTYPE:
179 case TYPERANGE_TARGETADDRESS:
180 case TYPERANGE_UTF8:
181 param->type = TYPE_STRING;
182 break;
183 default:
184 pr_err("Unknown type_range 0x%02x\n",
185 param->type_range);
186 goto out;
187 }
188 list_add_tail(¶m->p_list, ¶m_list->param_list);
189
190 return param;
191 out:
192 if (param) {
193 kfree(param->value);
194 kfree(param->name);
195 kfree(param);
196 }
197
198 return NULL;
199 }
200
201 /* #warning Add extension keys */
iscsi_create_default_params(struct iscsi_param_list ** param_list_ptr)202 int iscsi_create_default_params(struct iscsi_param_list **param_list_ptr)
203 {
204 struct iscsi_param *param = NULL;
205 struct iscsi_param_list *pl;
206
207 pl = kzalloc(sizeof(struct iscsi_param_list), GFP_KERNEL);
208 if (!pl) {
209 pr_err("Unable to allocate memory for"
210 " struct iscsi_param_list.\n");
211 return -ENOMEM;
212 }
213 INIT_LIST_HEAD(&pl->param_list);
214 INIT_LIST_HEAD(&pl->extra_response_list);
215
216 /*
217 * The format for setting the initial parameter definitions are:
218 *
219 * Parameter name:
220 * Initial value:
221 * Allowable phase:
222 * Scope:
223 * Allowable senders:
224 * Typerange:
225 * Use:
226 */
227 param = iscsi_set_default_param(pl, AUTHMETHOD, INITIAL_AUTHMETHOD,
228 PHASE_SECURITY, SCOPE_CONNECTION_ONLY, SENDER_BOTH,
229 TYPERANGE_AUTH, USE_INITIAL_ONLY);
230 if (!param)
231 goto out;
232
233 param = iscsi_set_default_param(pl, HEADERDIGEST, INITIAL_HEADERDIGEST,
234 PHASE_OPERATIONAL, SCOPE_CONNECTION_ONLY, SENDER_BOTH,
235 TYPERANGE_DIGEST, USE_INITIAL_ONLY);
236 if (!param)
237 goto out;
238
239 param = iscsi_set_default_param(pl, DATADIGEST, INITIAL_DATADIGEST,
240 PHASE_OPERATIONAL, SCOPE_CONNECTION_ONLY, SENDER_BOTH,
241 TYPERANGE_DIGEST, USE_INITIAL_ONLY);
242 if (!param)
243 goto out;
244
245 param = iscsi_set_default_param(pl, MAXCONNECTIONS,
246 INITIAL_MAXCONNECTIONS, PHASE_OPERATIONAL,
247 SCOPE_SESSION_WIDE, SENDER_BOTH,
248 TYPERANGE_1_TO_65535, USE_LEADING_ONLY);
249 if (!param)
250 goto out;
251
252 param = iscsi_set_default_param(pl, SENDTARGETS, INITIAL_SENDTARGETS,
253 PHASE_FFP0, SCOPE_SESSION_WIDE, SENDER_INITIATOR,
254 TYPERANGE_UTF8, 0);
255 if (!param)
256 goto out;
257
258 param = iscsi_set_default_param(pl, TARGETNAME, INITIAL_TARGETNAME,
259 PHASE_DECLARATIVE, SCOPE_SESSION_WIDE, SENDER_BOTH,
260 TYPERANGE_ISCSINAME, USE_ALL);
261 if (!param)
262 goto out;
263
264 param = iscsi_set_default_param(pl, INITIATORNAME,
265 INITIAL_INITIATORNAME, PHASE_DECLARATIVE,
266 SCOPE_SESSION_WIDE, SENDER_INITIATOR,
267 TYPERANGE_ISCSINAME, USE_INITIAL_ONLY);
268 if (!param)
269 goto out;
270
271 param = iscsi_set_default_param(pl, TARGETALIAS, INITIAL_TARGETALIAS,
272 PHASE_DECLARATIVE, SCOPE_SESSION_WIDE, SENDER_TARGET,
273 TYPERANGE_UTF8, USE_ALL);
274 if (!param)
275 goto out;
276
277 param = iscsi_set_default_param(pl, INITIATORALIAS,
278 INITIAL_INITIATORALIAS, PHASE_DECLARATIVE,
279 SCOPE_SESSION_WIDE, SENDER_INITIATOR, TYPERANGE_UTF8,
280 USE_ALL);
281 if (!param)
282 goto out;
283
284 param = iscsi_set_default_param(pl, TARGETADDRESS,
285 INITIAL_TARGETADDRESS, PHASE_DECLARATIVE,
286 SCOPE_SESSION_WIDE, SENDER_TARGET,
287 TYPERANGE_TARGETADDRESS, USE_ALL);
288 if (!param)
289 goto out;
290
291 param = iscsi_set_default_param(pl, TARGETPORTALGROUPTAG,
292 INITIAL_TARGETPORTALGROUPTAG,
293 PHASE_DECLARATIVE, SCOPE_SESSION_WIDE, SENDER_TARGET,
294 TYPERANGE_0_TO_65535, USE_INITIAL_ONLY);
295 if (!param)
296 goto out;
297
298 param = iscsi_set_default_param(pl, INITIALR2T, INITIAL_INITIALR2T,
299 PHASE_OPERATIONAL, SCOPE_SESSION_WIDE, SENDER_BOTH,
300 TYPERANGE_BOOL_OR, USE_LEADING_ONLY);
301 if (!param)
302 goto out;
303
304 param = iscsi_set_default_param(pl, IMMEDIATEDATA,
305 INITIAL_IMMEDIATEDATA, PHASE_OPERATIONAL,
306 SCOPE_SESSION_WIDE, SENDER_BOTH, TYPERANGE_BOOL_AND,
307 USE_LEADING_ONLY);
308 if (!param)
309 goto out;
310
311 param = iscsi_set_default_param(pl, MAXXMITDATASEGMENTLENGTH,
312 INITIAL_MAXXMITDATASEGMENTLENGTH,
313 PHASE_OPERATIONAL, SCOPE_CONNECTION_ONLY, SENDER_BOTH,
314 TYPERANGE_512_TO_16777215, USE_ALL);
315 if (!param)
316 goto out;
317
318 param = iscsi_set_default_param(pl, MAXRECVDATASEGMENTLENGTH,
319 INITIAL_MAXRECVDATASEGMENTLENGTH,
320 PHASE_OPERATIONAL, SCOPE_CONNECTION_ONLY, SENDER_BOTH,
321 TYPERANGE_512_TO_16777215, USE_ALL);
322 if (!param)
323 goto out;
324
325 param = iscsi_set_default_param(pl, MAXBURSTLENGTH,
326 INITIAL_MAXBURSTLENGTH, PHASE_OPERATIONAL,
327 SCOPE_SESSION_WIDE, SENDER_BOTH,
328 TYPERANGE_512_TO_16777215, USE_LEADING_ONLY);
329 if (!param)
330 goto out;
331
332 param = iscsi_set_default_param(pl, FIRSTBURSTLENGTH,
333 INITIAL_FIRSTBURSTLENGTH,
334 PHASE_OPERATIONAL, SCOPE_SESSION_WIDE, SENDER_BOTH,
335 TYPERANGE_512_TO_16777215, USE_LEADING_ONLY);
336 if (!param)
337 goto out;
338
339 param = iscsi_set_default_param(pl, DEFAULTTIME2WAIT,
340 INITIAL_DEFAULTTIME2WAIT,
341 PHASE_OPERATIONAL, SCOPE_SESSION_WIDE, SENDER_BOTH,
342 TYPERANGE_0_TO_3600, USE_LEADING_ONLY);
343 if (!param)
344 goto out;
345
346 param = iscsi_set_default_param(pl, DEFAULTTIME2RETAIN,
347 INITIAL_DEFAULTTIME2RETAIN,
348 PHASE_OPERATIONAL, SCOPE_SESSION_WIDE, SENDER_BOTH,
349 TYPERANGE_0_TO_3600, USE_LEADING_ONLY);
350 if (!param)
351 goto out;
352
353 param = iscsi_set_default_param(pl, MAXOUTSTANDINGR2T,
354 INITIAL_MAXOUTSTANDINGR2T,
355 PHASE_OPERATIONAL, SCOPE_SESSION_WIDE, SENDER_BOTH,
356 TYPERANGE_1_TO_65535, USE_LEADING_ONLY);
357 if (!param)
358 goto out;
359
360 param = iscsi_set_default_param(pl, DATAPDUINORDER,
361 INITIAL_DATAPDUINORDER, PHASE_OPERATIONAL,
362 SCOPE_SESSION_WIDE, SENDER_BOTH, TYPERANGE_BOOL_OR,
363 USE_LEADING_ONLY);
364 if (!param)
365 goto out;
366
367 param = iscsi_set_default_param(pl, DATASEQUENCEINORDER,
368 INITIAL_DATASEQUENCEINORDER,
369 PHASE_OPERATIONAL, SCOPE_SESSION_WIDE, SENDER_BOTH,
370 TYPERANGE_BOOL_OR, USE_LEADING_ONLY);
371 if (!param)
372 goto out;
373
374 param = iscsi_set_default_param(pl, ERRORRECOVERYLEVEL,
375 INITIAL_ERRORRECOVERYLEVEL,
376 PHASE_OPERATIONAL, SCOPE_SESSION_WIDE, SENDER_BOTH,
377 TYPERANGE_0_TO_2, USE_LEADING_ONLY);
378 if (!param)
379 goto out;
380
381 param = iscsi_set_default_param(pl, SESSIONTYPE, INITIAL_SESSIONTYPE,
382 PHASE_DECLARATIVE, SCOPE_SESSION_WIDE, SENDER_INITIATOR,
383 TYPERANGE_SESSIONTYPE, USE_LEADING_ONLY);
384 if (!param)
385 goto out;
386
387 param = iscsi_set_default_param(pl, IFMARKER, INITIAL_IFMARKER,
388 PHASE_OPERATIONAL, SCOPE_CONNECTION_ONLY, SENDER_BOTH,
389 TYPERANGE_BOOL_AND, USE_INITIAL_ONLY);
390 if (!param)
391 goto out;
392
393 param = iscsi_set_default_param(pl, OFMARKER, INITIAL_OFMARKER,
394 PHASE_OPERATIONAL, SCOPE_CONNECTION_ONLY, SENDER_BOTH,
395 TYPERANGE_BOOL_AND, USE_INITIAL_ONLY);
396 if (!param)
397 goto out;
398
399 param = iscsi_set_default_param(pl, IFMARKINT, INITIAL_IFMARKINT,
400 PHASE_OPERATIONAL, SCOPE_CONNECTION_ONLY, SENDER_BOTH,
401 TYPERANGE_UTF8, USE_INITIAL_ONLY);
402 if (!param)
403 goto out;
404
405 param = iscsi_set_default_param(pl, OFMARKINT, INITIAL_OFMARKINT,
406 PHASE_OPERATIONAL, SCOPE_CONNECTION_ONLY, SENDER_BOTH,
407 TYPERANGE_UTF8, USE_INITIAL_ONLY);
408 if (!param)
409 goto out;
410
411 /*
412 * Extra parameters for ISER from RFC-5046
413 */
414 param = iscsi_set_default_param(pl, RDMAEXTENSIONS, INITIAL_RDMAEXTENSIONS,
415 PHASE_OPERATIONAL, SCOPE_SESSION_WIDE, SENDER_BOTH,
416 TYPERANGE_BOOL_AND, USE_LEADING_ONLY);
417 if (!param)
418 goto out;
419
420 param = iscsi_set_default_param(pl, INITIATORRECVDATASEGMENTLENGTH,
421 INITIAL_INITIATORRECVDATASEGMENTLENGTH,
422 PHASE_OPERATIONAL, SCOPE_CONNECTION_ONLY, SENDER_BOTH,
423 TYPERANGE_512_TO_16777215, USE_ALL);
424 if (!param)
425 goto out;
426
427 param = iscsi_set_default_param(pl, TARGETRECVDATASEGMENTLENGTH,
428 INITIAL_TARGETRECVDATASEGMENTLENGTH,
429 PHASE_OPERATIONAL, SCOPE_CONNECTION_ONLY, SENDER_BOTH,
430 TYPERANGE_512_TO_16777215, USE_ALL);
431 if (!param)
432 goto out;
433
434 *param_list_ptr = pl;
435 return 0;
436 out:
437 iscsi_release_param_list(pl);
438 return -1;
439 }
440
iscsi_set_keys_to_negotiate(struct iscsi_param_list * param_list,bool iser)441 int iscsi_set_keys_to_negotiate(
442 struct iscsi_param_list *param_list,
443 bool iser)
444 {
445 struct iscsi_param *param;
446
447 param_list->iser = iser;
448
449 list_for_each_entry(param, ¶m_list->param_list, p_list) {
450 param->state = 0;
451 if (!strcmp(param->name, AUTHMETHOD)) {
452 SET_PSTATE_NEGOTIATE(param);
453 } else if (!strcmp(param->name, HEADERDIGEST)) {
454 if (!iser)
455 SET_PSTATE_NEGOTIATE(param);
456 } else if (!strcmp(param->name, DATADIGEST)) {
457 if (!iser)
458 SET_PSTATE_NEGOTIATE(param);
459 } else if (!strcmp(param->name, MAXCONNECTIONS)) {
460 SET_PSTATE_NEGOTIATE(param);
461 } else if (!strcmp(param->name, TARGETNAME)) {
462 continue;
463 } else if (!strcmp(param->name, INITIATORNAME)) {
464 continue;
465 } else if (!strcmp(param->name, TARGETALIAS)) {
466 if (param->value)
467 SET_PSTATE_NEGOTIATE(param);
468 } else if (!strcmp(param->name, INITIATORALIAS)) {
469 continue;
470 } else if (!strcmp(param->name, TARGETPORTALGROUPTAG)) {
471 SET_PSTATE_NEGOTIATE(param);
472 } else if (!strcmp(param->name, INITIALR2T)) {
473 SET_PSTATE_NEGOTIATE(param);
474 } else if (!strcmp(param->name, IMMEDIATEDATA)) {
475 SET_PSTATE_NEGOTIATE(param);
476 } else if (!strcmp(param->name, MAXRECVDATASEGMENTLENGTH)) {
477 if (!iser)
478 SET_PSTATE_NEGOTIATE(param);
479 } else if (!strcmp(param->name, MAXXMITDATASEGMENTLENGTH)) {
480 continue;
481 } else if (!strcmp(param->name, MAXBURSTLENGTH)) {
482 SET_PSTATE_NEGOTIATE(param);
483 } else if (!strcmp(param->name, FIRSTBURSTLENGTH)) {
484 SET_PSTATE_NEGOTIATE(param);
485 } else if (!strcmp(param->name, DEFAULTTIME2WAIT)) {
486 SET_PSTATE_NEGOTIATE(param);
487 } else if (!strcmp(param->name, DEFAULTTIME2RETAIN)) {
488 SET_PSTATE_NEGOTIATE(param);
489 } else if (!strcmp(param->name, MAXOUTSTANDINGR2T)) {
490 SET_PSTATE_NEGOTIATE(param);
491 } else if (!strcmp(param->name, DATAPDUINORDER)) {
492 SET_PSTATE_NEGOTIATE(param);
493 } else if (!strcmp(param->name, DATASEQUENCEINORDER)) {
494 SET_PSTATE_NEGOTIATE(param);
495 } else if (!strcmp(param->name, ERRORRECOVERYLEVEL)) {
496 SET_PSTATE_NEGOTIATE(param);
497 } else if (!strcmp(param->name, SESSIONTYPE)) {
498 SET_PSTATE_NEGOTIATE(param);
499 } else if (!strcmp(param->name, IFMARKER)) {
500 SET_PSTATE_REJECT(param);
501 } else if (!strcmp(param->name, OFMARKER)) {
502 SET_PSTATE_REJECT(param);
503 } else if (!strcmp(param->name, IFMARKINT)) {
504 SET_PSTATE_REJECT(param);
505 } else if (!strcmp(param->name, OFMARKINT)) {
506 SET_PSTATE_REJECT(param);
507 } else if (!strcmp(param->name, RDMAEXTENSIONS)) {
508 if (iser)
509 SET_PSTATE_NEGOTIATE(param);
510 } else if (!strcmp(param->name, INITIATORRECVDATASEGMENTLENGTH)) {
511 if (iser)
512 SET_PSTATE_NEGOTIATE(param);
513 } else if (!strcmp(param->name, TARGETRECVDATASEGMENTLENGTH)) {
514 if (iser)
515 SET_PSTATE_NEGOTIATE(param);
516 }
517 }
518
519 return 0;
520 }
521
iscsi_set_keys_irrelevant_for_discovery(struct iscsi_param_list * param_list)522 int iscsi_set_keys_irrelevant_for_discovery(
523 struct iscsi_param_list *param_list)
524 {
525 struct iscsi_param *param;
526
527 list_for_each_entry(param, ¶m_list->param_list, p_list) {
528 if (!strcmp(param->name, MAXCONNECTIONS))
529 param->state &= ~PSTATE_NEGOTIATE;
530 else if (!strcmp(param->name, INITIALR2T))
531 param->state &= ~PSTATE_NEGOTIATE;
532 else if (!strcmp(param->name, IMMEDIATEDATA))
533 param->state &= ~PSTATE_NEGOTIATE;
534 else if (!strcmp(param->name, MAXBURSTLENGTH))
535 param->state &= ~PSTATE_NEGOTIATE;
536 else if (!strcmp(param->name, FIRSTBURSTLENGTH))
537 param->state &= ~PSTATE_NEGOTIATE;
538 else if (!strcmp(param->name, MAXOUTSTANDINGR2T))
539 param->state &= ~PSTATE_NEGOTIATE;
540 else if (!strcmp(param->name, DATAPDUINORDER))
541 param->state &= ~PSTATE_NEGOTIATE;
542 else if (!strcmp(param->name, DATASEQUENCEINORDER))
543 param->state &= ~PSTATE_NEGOTIATE;
544 else if (!strcmp(param->name, ERRORRECOVERYLEVEL))
545 param->state &= ~PSTATE_NEGOTIATE;
546 else if (!strcmp(param->name, DEFAULTTIME2WAIT))
547 param->state &= ~PSTATE_NEGOTIATE;
548 else if (!strcmp(param->name, DEFAULTTIME2RETAIN))
549 param->state &= ~PSTATE_NEGOTIATE;
550 else if (!strcmp(param->name, IFMARKER))
551 param->state &= ~PSTATE_NEGOTIATE;
552 else if (!strcmp(param->name, OFMARKER))
553 param->state &= ~PSTATE_NEGOTIATE;
554 else if (!strcmp(param->name, IFMARKINT))
555 param->state &= ~PSTATE_NEGOTIATE;
556 else if (!strcmp(param->name, OFMARKINT))
557 param->state &= ~PSTATE_NEGOTIATE;
558 else if (!strcmp(param->name, RDMAEXTENSIONS))
559 param->state &= ~PSTATE_NEGOTIATE;
560 else if (!strcmp(param->name, INITIATORRECVDATASEGMENTLENGTH))
561 param->state &= ~PSTATE_NEGOTIATE;
562 else if (!strcmp(param->name, TARGETRECVDATASEGMENTLENGTH))
563 param->state &= ~PSTATE_NEGOTIATE;
564 }
565
566 return 0;
567 }
568
iscsi_copy_param_list(struct iscsi_param_list ** dst_param_list,struct iscsi_param_list * src_param_list,int leading)569 int iscsi_copy_param_list(
570 struct iscsi_param_list **dst_param_list,
571 struct iscsi_param_list *src_param_list,
572 int leading)
573 {
574 struct iscsi_param *param = NULL;
575 struct iscsi_param *new_param = NULL;
576 struct iscsi_param_list *param_list = NULL;
577
578 param_list = kzalloc(sizeof(struct iscsi_param_list), GFP_KERNEL);
579 if (!param_list) {
580 pr_err("Unable to allocate memory for struct iscsi_param_list.\n");
581 return -ENOMEM;
582 }
583 INIT_LIST_HEAD(¶m_list->param_list);
584 INIT_LIST_HEAD(¶m_list->extra_response_list);
585
586 list_for_each_entry(param, &src_param_list->param_list, p_list) {
587 if (!leading && (param->scope & SCOPE_SESSION_WIDE)) {
588 if ((strcmp(param->name, "TargetName") != 0) &&
589 (strcmp(param->name, "InitiatorName") != 0) &&
590 (strcmp(param->name, "TargetPortalGroupTag") != 0))
591 continue;
592 }
593
594 new_param = kzalloc(sizeof(struct iscsi_param), GFP_KERNEL);
595 if (!new_param) {
596 pr_err("Unable to allocate memory for struct iscsi_param.\n");
597 goto err_out;
598 }
599
600 new_param->name = kstrdup(param->name, GFP_KERNEL);
601 new_param->value = kstrdup(param->value, GFP_KERNEL);
602 if (!new_param->value || !new_param->name) {
603 kfree(new_param->value);
604 kfree(new_param->name);
605 kfree(new_param);
606 pr_err("Unable to allocate memory for parameter name/value.\n");
607 goto err_out;
608 }
609
610 new_param->set_param = param->set_param;
611 new_param->phase = param->phase;
612 new_param->scope = param->scope;
613 new_param->sender = param->sender;
614 new_param->type = param->type;
615 new_param->use = param->use;
616 new_param->type_range = param->type_range;
617
618 list_add_tail(&new_param->p_list, ¶m_list->param_list);
619 }
620
621 if (!list_empty(¶m_list->param_list)) {
622 *dst_param_list = param_list;
623 } else {
624 pr_err("No parameters allocated.\n");
625 goto err_out;
626 }
627
628 return 0;
629
630 err_out:
631 iscsi_release_param_list(param_list);
632 return -ENOMEM;
633 }
634
iscsi_release_extra_responses(struct iscsi_param_list * param_list)635 static void iscsi_release_extra_responses(struct iscsi_param_list *param_list)
636 {
637 struct iscsi_extra_response *er, *er_tmp;
638
639 list_for_each_entry_safe(er, er_tmp, ¶m_list->extra_response_list,
640 er_list) {
641 list_del(&er->er_list);
642 kfree(er);
643 }
644 }
645
iscsi_release_param_list(struct iscsi_param_list * param_list)646 void iscsi_release_param_list(struct iscsi_param_list *param_list)
647 {
648 struct iscsi_param *param, *param_tmp;
649
650 list_for_each_entry_safe(param, param_tmp, ¶m_list->param_list,
651 p_list) {
652 list_del(¶m->p_list);
653
654 kfree(param->name);
655 kfree(param->value);
656 kfree(param);
657 }
658
659 iscsi_release_extra_responses(param_list);
660
661 kfree(param_list);
662 }
663
iscsi_find_param_from_key(char * key,struct iscsi_param_list * param_list)664 struct iscsi_param *iscsi_find_param_from_key(
665 char *key,
666 struct iscsi_param_list *param_list)
667 {
668 struct iscsi_param *param;
669
670 if (!key || !param_list) {
671 pr_err("Key or parameter list pointer is NULL.\n");
672 return NULL;
673 }
674
675 list_for_each_entry(param, ¶m_list->param_list, p_list) {
676 if (!strcmp(key, param->name))
677 return param;
678 }
679
680 pr_err("Unable to locate key \"%s\".\n", key);
681 return NULL;
682 }
683
iscsi_extract_key_value(char * textbuf,char ** key,char ** value)684 int iscsi_extract_key_value(char *textbuf, char **key, char **value)
685 {
686 *value = strchr(textbuf, '=');
687 if (!*value) {
688 pr_err("Unable to locate \"=\" separator for key,"
689 " ignoring request.\n");
690 return -1;
691 }
692
693 *key = textbuf;
694 **value = '\0';
695 *value = *value + 1;
696
697 return 0;
698 }
699
iscsi_update_param_value(struct iscsi_param * param,char * value)700 int iscsi_update_param_value(struct iscsi_param *param, char *value)
701 {
702 kfree(param->value);
703
704 param->value = kstrdup(value, GFP_KERNEL);
705 if (!param->value) {
706 pr_err("Unable to allocate memory for value.\n");
707 return -ENOMEM;
708 }
709
710 pr_debug("iSCSI Parameter updated to %s=%s\n",
711 param->name, param->value);
712 return 0;
713 }
714
iscsi_add_notunderstood_response(char * key,char * value,struct iscsi_param_list * param_list)715 static int iscsi_add_notunderstood_response(
716 char *key,
717 char *value,
718 struct iscsi_param_list *param_list)
719 {
720 struct iscsi_extra_response *extra_response;
721
722 if (strlen(value) > VALUE_MAXLEN) {
723 pr_err("Value for notunderstood key \"%s\" exceeds %d,"
724 " protocol error.\n", key, VALUE_MAXLEN);
725 return -1;
726 }
727
728 extra_response = kzalloc(sizeof(struct iscsi_extra_response), GFP_KERNEL);
729 if (!extra_response) {
730 pr_err("Unable to allocate memory for"
731 " struct iscsi_extra_response.\n");
732 return -ENOMEM;
733 }
734 INIT_LIST_HEAD(&extra_response->er_list);
735
736 strlcpy(extra_response->key, key, sizeof(extra_response->key));
737 strlcpy(extra_response->value, NOTUNDERSTOOD,
738 sizeof(extra_response->value));
739
740 list_add_tail(&extra_response->er_list,
741 ¶m_list->extra_response_list);
742 return 0;
743 }
744
iscsi_check_for_auth_key(char * key)745 static int iscsi_check_for_auth_key(char *key)
746 {
747 /*
748 * RFC 1994
749 */
750 if (!strcmp(key, "CHAP_A") || !strcmp(key, "CHAP_I") ||
751 !strcmp(key, "CHAP_C") || !strcmp(key, "CHAP_N") ||
752 !strcmp(key, "CHAP_R"))
753 return 1;
754
755 /*
756 * RFC 2945
757 */
758 if (!strcmp(key, "SRP_U") || !strcmp(key, "SRP_N") ||
759 !strcmp(key, "SRP_g") || !strcmp(key, "SRP_s") ||
760 !strcmp(key, "SRP_A") || !strcmp(key, "SRP_B") ||
761 !strcmp(key, "SRP_M") || !strcmp(key, "SRP_HM"))
762 return 1;
763
764 return 0;
765 }
766
iscsi_check_proposer_for_optional_reply(struct iscsi_param * param,bool keys_workaround)767 static void iscsi_check_proposer_for_optional_reply(struct iscsi_param *param,
768 bool keys_workaround)
769 {
770 if (IS_TYPE_BOOL_AND(param)) {
771 if (!strcmp(param->value, NO))
772 SET_PSTATE_REPLY_OPTIONAL(param);
773 } else if (IS_TYPE_BOOL_OR(param)) {
774 if (!strcmp(param->value, YES))
775 SET_PSTATE_REPLY_OPTIONAL(param);
776
777 if (keys_workaround) {
778 /*
779 * Required for gPXE iSCSI boot client
780 */
781 if (!strcmp(param->name, IMMEDIATEDATA))
782 SET_PSTATE_REPLY_OPTIONAL(param);
783 }
784 } else if (IS_TYPE_NUMBER(param)) {
785 if (!strcmp(param->name, MAXRECVDATASEGMENTLENGTH))
786 SET_PSTATE_REPLY_OPTIONAL(param);
787
788 if (keys_workaround) {
789 /*
790 * Required for Mellanox Flexboot PXE boot ROM
791 */
792 if (!strcmp(param->name, FIRSTBURSTLENGTH))
793 SET_PSTATE_REPLY_OPTIONAL(param);
794
795 /*
796 * Required for gPXE iSCSI boot client
797 */
798 if (!strcmp(param->name, MAXCONNECTIONS))
799 SET_PSTATE_REPLY_OPTIONAL(param);
800 }
801 } else if (IS_PHASE_DECLARATIVE(param))
802 SET_PSTATE_REPLY_OPTIONAL(param);
803 }
804
iscsi_check_boolean_value(struct iscsi_param * param,char * value)805 static int iscsi_check_boolean_value(struct iscsi_param *param, char *value)
806 {
807 if (strcmp(value, YES) && strcmp(value, NO)) {
808 pr_err("Illegal value for \"%s\", must be either"
809 " \"%s\" or \"%s\".\n", param->name, YES, NO);
810 return -1;
811 }
812
813 return 0;
814 }
815
iscsi_check_numerical_value(struct iscsi_param * param,char * value_ptr)816 static int iscsi_check_numerical_value(struct iscsi_param *param, char *value_ptr)
817 {
818 char *tmpptr;
819 int value = 0;
820
821 value = simple_strtoul(value_ptr, &tmpptr, 0);
822
823 if (IS_TYPERANGE_0_TO_2(param)) {
824 if ((value < 0) || (value > 2)) {
825 pr_err("Illegal value for \"%s\", must be"
826 " between 0 and 2.\n", param->name);
827 return -1;
828 }
829 return 0;
830 }
831 if (IS_TYPERANGE_0_TO_3600(param)) {
832 if ((value < 0) || (value > 3600)) {
833 pr_err("Illegal value for \"%s\", must be"
834 " between 0 and 3600.\n", param->name);
835 return -1;
836 }
837 return 0;
838 }
839 if (IS_TYPERANGE_0_TO_32767(param)) {
840 if ((value < 0) || (value > 32767)) {
841 pr_err("Illegal value for \"%s\", must be"
842 " between 0 and 32767.\n", param->name);
843 return -1;
844 }
845 return 0;
846 }
847 if (IS_TYPERANGE_0_TO_65535(param)) {
848 if ((value < 0) || (value > 65535)) {
849 pr_err("Illegal value for \"%s\", must be"
850 " between 0 and 65535.\n", param->name);
851 return -1;
852 }
853 return 0;
854 }
855 if (IS_TYPERANGE_1_TO_65535(param)) {
856 if ((value < 1) || (value > 65535)) {
857 pr_err("Illegal value for \"%s\", must be"
858 " between 1 and 65535.\n", param->name);
859 return -1;
860 }
861 return 0;
862 }
863 if (IS_TYPERANGE_2_TO_3600(param)) {
864 if ((value < 2) || (value > 3600)) {
865 pr_err("Illegal value for \"%s\", must be"
866 " between 2 and 3600.\n", param->name);
867 return -1;
868 }
869 return 0;
870 }
871 if (IS_TYPERANGE_512_TO_16777215(param)) {
872 if ((value < 512) || (value > 16777215)) {
873 pr_err("Illegal value for \"%s\", must be"
874 " between 512 and 16777215.\n", param->name);
875 return -1;
876 }
877 return 0;
878 }
879
880 return 0;
881 }
882
iscsi_check_string_or_list_value(struct iscsi_param * param,char * value)883 static int iscsi_check_string_or_list_value(struct iscsi_param *param, char *value)
884 {
885 if (IS_PSTATE_PROPOSER(param))
886 return 0;
887
888 if (IS_TYPERANGE_AUTH_PARAM(param)) {
889 if (strcmp(value, KRB5) && strcmp(value, SPKM1) &&
890 strcmp(value, SPKM2) && strcmp(value, SRP) &&
891 strcmp(value, CHAP) && strcmp(value, NONE)) {
892 pr_err("Illegal value for \"%s\", must be"
893 " \"%s\", \"%s\", \"%s\", \"%s\", \"%s\""
894 " or \"%s\".\n", param->name, KRB5,
895 SPKM1, SPKM2, SRP, CHAP, NONE);
896 return -1;
897 }
898 }
899 if (IS_TYPERANGE_DIGEST_PARAM(param)) {
900 if (strcmp(value, CRC32C) && strcmp(value, NONE)) {
901 pr_err("Illegal value for \"%s\", must be"
902 " \"%s\" or \"%s\".\n", param->name,
903 CRC32C, NONE);
904 return -1;
905 }
906 }
907 if (IS_TYPERANGE_SESSIONTYPE(param)) {
908 if (strcmp(value, DISCOVERY) && strcmp(value, NORMAL)) {
909 pr_err("Illegal value for \"%s\", must be"
910 " \"%s\" or \"%s\".\n", param->name,
911 DISCOVERY, NORMAL);
912 return -1;
913 }
914 }
915
916 return 0;
917 }
918
iscsi_check_valuelist_for_support(struct iscsi_param * param,char * value)919 static char *iscsi_check_valuelist_for_support(
920 struct iscsi_param *param,
921 char *value)
922 {
923 char *tmp1 = NULL, *tmp2 = NULL;
924 char *acceptor_values = NULL, *proposer_values = NULL;
925
926 acceptor_values = param->value;
927 proposer_values = value;
928
929 do {
930 if (!proposer_values)
931 return NULL;
932 tmp1 = strchr(proposer_values, ',');
933 if (tmp1)
934 *tmp1 = '\0';
935 acceptor_values = param->value;
936 do {
937 if (!acceptor_values) {
938 if (tmp1)
939 *tmp1 = ',';
940 return NULL;
941 }
942 tmp2 = strchr(acceptor_values, ',');
943 if (tmp2)
944 *tmp2 = '\0';
945 if (!strcmp(acceptor_values, proposer_values)) {
946 if (tmp2)
947 *tmp2 = ',';
948 goto out;
949 }
950 if (tmp2)
951 *tmp2++ = ',';
952
953 acceptor_values = tmp2;
954 } while (acceptor_values);
955 if (tmp1)
956 *tmp1++ = ',';
957 proposer_values = tmp1;
958 } while (proposer_values);
959
960 out:
961 return proposer_values;
962 }
963
iscsi_check_acceptor_state(struct iscsi_param * param,char * value,struct iscsi_conn * conn)964 static int iscsi_check_acceptor_state(struct iscsi_param *param, char *value,
965 struct iscsi_conn *conn)
966 {
967 u8 acceptor_boolean_value = 0, proposer_boolean_value = 0;
968 char *negotiated_value = NULL;
969
970 if (IS_PSTATE_ACCEPTOR(param)) {
971 pr_err("Received key \"%s\" twice, protocol error.\n",
972 param->name);
973 return -1;
974 }
975
976 if (IS_PSTATE_REJECT(param))
977 return 0;
978
979 if (IS_TYPE_BOOL_AND(param)) {
980 if (!strcmp(value, YES))
981 proposer_boolean_value = 1;
982 if (!strcmp(param->value, YES))
983 acceptor_boolean_value = 1;
984 if (acceptor_boolean_value && proposer_boolean_value)
985 do {} while (0);
986 else {
987 if (iscsi_update_param_value(param, NO) < 0)
988 return -1;
989 if (!proposer_boolean_value)
990 SET_PSTATE_REPLY_OPTIONAL(param);
991 }
992 } else if (IS_TYPE_BOOL_OR(param)) {
993 if (!strcmp(value, YES))
994 proposer_boolean_value = 1;
995 if (!strcmp(param->value, YES))
996 acceptor_boolean_value = 1;
997 if (acceptor_boolean_value || proposer_boolean_value) {
998 if (iscsi_update_param_value(param, YES) < 0)
999 return -1;
1000 if (proposer_boolean_value)
1001 SET_PSTATE_REPLY_OPTIONAL(param);
1002 }
1003 } else if (IS_TYPE_NUMBER(param)) {
1004 char *tmpptr, buf[11];
1005 u32 acceptor_value = simple_strtoul(param->value, &tmpptr, 0);
1006 u32 proposer_value = simple_strtoul(value, &tmpptr, 0);
1007
1008 memset(buf, 0, sizeof(buf));
1009
1010 if (!strcmp(param->name, MAXCONNECTIONS) ||
1011 !strcmp(param->name, MAXBURSTLENGTH) ||
1012 !strcmp(param->name, FIRSTBURSTLENGTH) ||
1013 !strcmp(param->name, MAXOUTSTANDINGR2T) ||
1014 !strcmp(param->name, DEFAULTTIME2RETAIN) ||
1015 !strcmp(param->name, ERRORRECOVERYLEVEL)) {
1016 if (proposer_value > acceptor_value) {
1017 sprintf(buf, "%u", acceptor_value);
1018 if (iscsi_update_param_value(param,
1019 &buf[0]) < 0)
1020 return -1;
1021 } else {
1022 if (iscsi_update_param_value(param, value) < 0)
1023 return -1;
1024 }
1025 } else if (!strcmp(param->name, DEFAULTTIME2WAIT)) {
1026 if (acceptor_value > proposer_value) {
1027 sprintf(buf, "%u", acceptor_value);
1028 if (iscsi_update_param_value(param,
1029 &buf[0]) < 0)
1030 return -1;
1031 } else {
1032 if (iscsi_update_param_value(param, value) < 0)
1033 return -1;
1034 }
1035 } else {
1036 if (iscsi_update_param_value(param, value) < 0)
1037 return -1;
1038 }
1039
1040 if (!strcmp(param->name, MAXRECVDATASEGMENTLENGTH)) {
1041 struct iscsi_param *param_mxdsl;
1042 unsigned long long tmp;
1043 int rc;
1044
1045 rc = kstrtoull(param->value, 0, &tmp);
1046 if (rc < 0)
1047 return -1;
1048
1049 conn->conn_ops->MaxRecvDataSegmentLength = tmp;
1050 pr_debug("Saving op->MaxRecvDataSegmentLength from"
1051 " original initiator received value: %u\n",
1052 conn->conn_ops->MaxRecvDataSegmentLength);
1053
1054 param_mxdsl = iscsi_find_param_from_key(
1055 MAXXMITDATASEGMENTLENGTH,
1056 conn->param_list);
1057 if (!param_mxdsl)
1058 return -1;
1059
1060 rc = iscsi_update_param_value(param,
1061 param_mxdsl->value);
1062 if (rc < 0)
1063 return -1;
1064
1065 pr_debug("Updated %s to target MXDSL value: %s\n",
1066 param->name, param->value);
1067 }
1068 } else if (IS_TYPE_VALUE_LIST(param)) {
1069 negotiated_value = iscsi_check_valuelist_for_support(
1070 param, value);
1071 if (!negotiated_value) {
1072 pr_err("Proposer's value list \"%s\" contains"
1073 " no valid values from Acceptor's value list"
1074 " \"%s\".\n", value, param->value);
1075 return -1;
1076 }
1077 if (iscsi_update_param_value(param, negotiated_value) < 0)
1078 return -1;
1079 } else if (IS_PHASE_DECLARATIVE(param)) {
1080 if (iscsi_update_param_value(param, value) < 0)
1081 return -1;
1082 SET_PSTATE_REPLY_OPTIONAL(param);
1083 }
1084
1085 return 0;
1086 }
1087
iscsi_check_proposer_state(struct iscsi_param * param,char * value)1088 static int iscsi_check_proposer_state(struct iscsi_param *param, char *value)
1089 {
1090 if (IS_PSTATE_RESPONSE_GOT(param)) {
1091 pr_err("Received key \"%s\" twice, protocol error.\n",
1092 param->name);
1093 return -1;
1094 }
1095
1096 if (IS_TYPE_VALUE_LIST(param)) {
1097 char *comma_ptr = NULL, *tmp_ptr = NULL;
1098
1099 comma_ptr = strchr(value, ',');
1100 if (comma_ptr) {
1101 pr_err("Illegal \",\" in response for \"%s\".\n",
1102 param->name);
1103 return -1;
1104 }
1105
1106 tmp_ptr = iscsi_check_valuelist_for_support(param, value);
1107 if (!tmp_ptr)
1108 return -1;
1109 }
1110
1111 if (iscsi_update_param_value(param, value) < 0)
1112 return -1;
1113
1114 return 0;
1115 }
1116
iscsi_check_value(struct iscsi_param * param,char * value)1117 static int iscsi_check_value(struct iscsi_param *param, char *value)
1118 {
1119 char *comma_ptr = NULL;
1120
1121 if (!strcmp(value, REJECT)) {
1122 if (!strcmp(param->name, IFMARKINT) ||
1123 !strcmp(param->name, OFMARKINT)) {
1124 /*
1125 * Reject is not fatal for [I,O]FMarkInt, and causes
1126 * [I,O]FMarker to be reset to No. (See iSCSI v20 A.3.2)
1127 */
1128 SET_PSTATE_REJECT(param);
1129 return 0;
1130 }
1131 pr_err("Received %s=%s\n", param->name, value);
1132 return -1;
1133 }
1134 if (!strcmp(value, IRRELEVANT)) {
1135 pr_debug("Received %s=%s\n", param->name, value);
1136 SET_PSTATE_IRRELEVANT(param);
1137 return 0;
1138 }
1139 if (!strcmp(value, NOTUNDERSTOOD)) {
1140 if (!IS_PSTATE_PROPOSER(param)) {
1141 pr_err("Received illegal offer %s=%s\n",
1142 param->name, value);
1143 return -1;
1144 }
1145
1146 /* #warning FIXME: Add check for X-ExtensionKey here */
1147 pr_err("Standard iSCSI key \"%s\" cannot be answered"
1148 " with \"%s\", protocol error.\n", param->name, value);
1149 return -1;
1150 }
1151
1152 do {
1153 comma_ptr = NULL;
1154 comma_ptr = strchr(value, ',');
1155
1156 if (comma_ptr && !IS_TYPE_VALUE_LIST(param)) {
1157 pr_err("Detected value separator \",\", but"
1158 " key \"%s\" does not allow a value list,"
1159 " protocol error.\n", param->name);
1160 return -1;
1161 }
1162 if (comma_ptr)
1163 *comma_ptr = '\0';
1164
1165 if (strlen(value) > VALUE_MAXLEN) {
1166 pr_err("Value for key \"%s\" exceeds %d,"
1167 " protocol error.\n", param->name,
1168 VALUE_MAXLEN);
1169 return -1;
1170 }
1171
1172 if (IS_TYPE_BOOL_AND(param) || IS_TYPE_BOOL_OR(param)) {
1173 if (iscsi_check_boolean_value(param, value) < 0)
1174 return -1;
1175 } else if (IS_TYPE_NUMBER(param)) {
1176 if (iscsi_check_numerical_value(param, value) < 0)
1177 return -1;
1178 } else if (IS_TYPE_STRING(param) || IS_TYPE_VALUE_LIST(param)) {
1179 if (iscsi_check_string_or_list_value(param, value) < 0)
1180 return -1;
1181 } else {
1182 pr_err("Huh? 0x%02x\n", param->type);
1183 return -1;
1184 }
1185
1186 if (comma_ptr)
1187 *comma_ptr++ = ',';
1188
1189 value = comma_ptr;
1190 } while (value);
1191
1192 return 0;
1193 }
1194
__iscsi_check_key(char * key,int sender,struct iscsi_param_list * param_list)1195 static struct iscsi_param *__iscsi_check_key(
1196 char *key,
1197 int sender,
1198 struct iscsi_param_list *param_list)
1199 {
1200 struct iscsi_param *param;
1201
1202 if (strlen(key) > KEY_MAXLEN) {
1203 pr_err("Length of key name \"%s\" exceeds %d.\n",
1204 key, KEY_MAXLEN);
1205 return NULL;
1206 }
1207
1208 param = iscsi_find_param_from_key(key, param_list);
1209 if (!param)
1210 return NULL;
1211
1212 if ((sender & SENDER_INITIATOR) && !IS_SENDER_INITIATOR(param)) {
1213 pr_err("Key \"%s\" may not be sent to %s,"
1214 " protocol error.\n", param->name,
1215 (sender & SENDER_RECEIVER) ? "target" : "initiator");
1216 return NULL;
1217 }
1218
1219 if ((sender & SENDER_TARGET) && !IS_SENDER_TARGET(param)) {
1220 pr_err("Key \"%s\" may not be sent to %s,"
1221 " protocol error.\n", param->name,
1222 (sender & SENDER_RECEIVER) ? "initiator" : "target");
1223 return NULL;
1224 }
1225
1226 return param;
1227 }
1228
iscsi_check_key(char * key,int phase,int sender,struct iscsi_param_list * param_list)1229 static struct iscsi_param *iscsi_check_key(
1230 char *key,
1231 int phase,
1232 int sender,
1233 struct iscsi_param_list *param_list)
1234 {
1235 struct iscsi_param *param;
1236 /*
1237 * Key name length must not exceed 63 bytes. (See iSCSI v20 5.1)
1238 */
1239 if (strlen(key) > KEY_MAXLEN) {
1240 pr_err("Length of key name \"%s\" exceeds %d.\n",
1241 key, KEY_MAXLEN);
1242 return NULL;
1243 }
1244
1245 param = iscsi_find_param_from_key(key, param_list);
1246 if (!param)
1247 return NULL;
1248
1249 if ((sender & SENDER_INITIATOR) && !IS_SENDER_INITIATOR(param)) {
1250 pr_err("Key \"%s\" may not be sent to %s,"
1251 " protocol error.\n", param->name,
1252 (sender & SENDER_RECEIVER) ? "target" : "initiator");
1253 return NULL;
1254 }
1255 if ((sender & SENDER_TARGET) && !IS_SENDER_TARGET(param)) {
1256 pr_err("Key \"%s\" may not be sent to %s,"
1257 " protocol error.\n", param->name,
1258 (sender & SENDER_RECEIVER) ? "initiator" : "target");
1259 return NULL;
1260 }
1261
1262 if (IS_PSTATE_ACCEPTOR(param)) {
1263 pr_err("Key \"%s\" received twice, protocol error.\n",
1264 key);
1265 return NULL;
1266 }
1267
1268 if (!phase)
1269 return param;
1270
1271 if (!(param->phase & phase)) {
1272 pr_err("Key \"%s\" may not be negotiated during ",
1273 param->name);
1274 switch (phase) {
1275 case PHASE_SECURITY:
1276 pr_debug("Security phase.\n");
1277 break;
1278 case PHASE_OPERATIONAL:
1279 pr_debug("Operational phase.\n");
1280 break;
1281 default:
1282 pr_debug("Unknown phase.\n");
1283 }
1284 return NULL;
1285 }
1286
1287 return param;
1288 }
1289
iscsi_enforce_integrity_rules(u8 phase,struct iscsi_param_list * param_list)1290 static int iscsi_enforce_integrity_rules(
1291 u8 phase,
1292 struct iscsi_param_list *param_list)
1293 {
1294 char *tmpptr;
1295 u8 DataSequenceInOrder = 0;
1296 u8 ErrorRecoveryLevel = 0, SessionType = 0;
1297 u32 FirstBurstLength = 0, MaxBurstLength = 0;
1298 struct iscsi_param *param = NULL;
1299
1300 list_for_each_entry(param, ¶m_list->param_list, p_list) {
1301 if (!(param->phase & phase))
1302 continue;
1303 if (!strcmp(param->name, SESSIONTYPE))
1304 if (!strcmp(param->value, NORMAL))
1305 SessionType = 1;
1306 if (!strcmp(param->name, ERRORRECOVERYLEVEL))
1307 ErrorRecoveryLevel = simple_strtoul(param->value,
1308 &tmpptr, 0);
1309 if (!strcmp(param->name, DATASEQUENCEINORDER))
1310 if (!strcmp(param->value, YES))
1311 DataSequenceInOrder = 1;
1312 if (!strcmp(param->name, MAXBURSTLENGTH))
1313 MaxBurstLength = simple_strtoul(param->value,
1314 &tmpptr, 0);
1315 }
1316
1317 list_for_each_entry(param, ¶m_list->param_list, p_list) {
1318 if (!(param->phase & phase))
1319 continue;
1320 if (!SessionType && !IS_PSTATE_ACCEPTOR(param))
1321 continue;
1322 if (!strcmp(param->name, MAXOUTSTANDINGR2T) &&
1323 DataSequenceInOrder && (ErrorRecoveryLevel > 0)) {
1324 if (strcmp(param->value, "1")) {
1325 if (iscsi_update_param_value(param, "1") < 0)
1326 return -1;
1327 pr_debug("Reset \"%s\" to \"%s\".\n",
1328 param->name, param->value);
1329 }
1330 }
1331 if (!strcmp(param->name, MAXCONNECTIONS) && !SessionType) {
1332 if (strcmp(param->value, "1")) {
1333 if (iscsi_update_param_value(param, "1") < 0)
1334 return -1;
1335 pr_debug("Reset \"%s\" to \"%s\".\n",
1336 param->name, param->value);
1337 }
1338 }
1339 if (!strcmp(param->name, FIRSTBURSTLENGTH)) {
1340 FirstBurstLength = simple_strtoul(param->value,
1341 &tmpptr, 0);
1342 if (FirstBurstLength > MaxBurstLength) {
1343 char tmpbuf[11];
1344 memset(tmpbuf, 0, sizeof(tmpbuf));
1345 sprintf(tmpbuf, "%u", MaxBurstLength);
1346 if (iscsi_update_param_value(param, tmpbuf))
1347 return -1;
1348 pr_debug("Reset \"%s\" to \"%s\".\n",
1349 param->name, param->value);
1350 }
1351 }
1352 }
1353
1354 return 0;
1355 }
1356
iscsi_decode_text_input(u8 phase,u8 sender,char * textbuf,u32 length,struct iscsi_conn * conn)1357 int iscsi_decode_text_input(
1358 u8 phase,
1359 u8 sender,
1360 char *textbuf,
1361 u32 length,
1362 struct iscsi_conn *conn)
1363 {
1364 struct iscsi_param_list *param_list = conn->param_list;
1365 char *tmpbuf, *start = NULL, *end = NULL;
1366
1367 tmpbuf = kzalloc(length + 1, GFP_KERNEL);
1368 if (!tmpbuf) {
1369 pr_err("Unable to allocate %u + 1 bytes for tmpbuf.\n", length);
1370 return -ENOMEM;
1371 }
1372
1373 memcpy(tmpbuf, textbuf, length);
1374 tmpbuf[length] = '\0';
1375 start = tmpbuf;
1376 end = (start + length);
1377
1378 while (start < end) {
1379 char *key, *value;
1380 struct iscsi_param *param;
1381
1382 if (iscsi_extract_key_value(start, &key, &value) < 0) {
1383 kfree(tmpbuf);
1384 return -1;
1385 }
1386
1387 pr_debug("Got key: %s=%s\n", key, value);
1388
1389 if (phase & PHASE_SECURITY) {
1390 if (iscsi_check_for_auth_key(key) > 0) {
1391 kfree(tmpbuf);
1392 return 1;
1393 }
1394 }
1395
1396 param = iscsi_check_key(key, phase, sender, param_list);
1397 if (!param) {
1398 if (iscsi_add_notunderstood_response(key,
1399 value, param_list) < 0) {
1400 kfree(tmpbuf);
1401 return -1;
1402 }
1403 start += strlen(key) + strlen(value) + 2;
1404 continue;
1405 }
1406 if (iscsi_check_value(param, value) < 0) {
1407 kfree(tmpbuf);
1408 return -1;
1409 }
1410
1411 start += strlen(key) + strlen(value) + 2;
1412
1413 if (IS_PSTATE_PROPOSER(param)) {
1414 if (iscsi_check_proposer_state(param, value) < 0) {
1415 kfree(tmpbuf);
1416 return -1;
1417 }
1418 SET_PSTATE_RESPONSE_GOT(param);
1419 } else {
1420 if (iscsi_check_acceptor_state(param, value, conn) < 0) {
1421 kfree(tmpbuf);
1422 return -1;
1423 }
1424 SET_PSTATE_ACCEPTOR(param);
1425 }
1426 }
1427
1428 kfree(tmpbuf);
1429 return 0;
1430 }
1431
iscsi_encode_text_output(u8 phase,u8 sender,char * textbuf,u32 * length,struct iscsi_param_list * param_list,bool keys_workaround)1432 int iscsi_encode_text_output(
1433 u8 phase,
1434 u8 sender,
1435 char *textbuf,
1436 u32 *length,
1437 struct iscsi_param_list *param_list,
1438 bool keys_workaround)
1439 {
1440 char *output_buf = NULL;
1441 struct iscsi_extra_response *er;
1442 struct iscsi_param *param;
1443
1444 output_buf = textbuf + *length;
1445
1446 if (iscsi_enforce_integrity_rules(phase, param_list) < 0)
1447 return -1;
1448
1449 list_for_each_entry(param, ¶m_list->param_list, p_list) {
1450 if (!(param->sender & sender))
1451 continue;
1452 if (IS_PSTATE_ACCEPTOR(param) &&
1453 !IS_PSTATE_RESPONSE_SENT(param) &&
1454 !IS_PSTATE_REPLY_OPTIONAL(param) &&
1455 (param->phase & phase)) {
1456 *length += sprintf(output_buf, "%s=%s",
1457 param->name, param->value);
1458 *length += 1;
1459 output_buf = textbuf + *length;
1460 SET_PSTATE_RESPONSE_SENT(param);
1461 pr_debug("Sending key: %s=%s\n",
1462 param->name, param->value);
1463 continue;
1464 }
1465 if (IS_PSTATE_NEGOTIATE(param) &&
1466 !IS_PSTATE_ACCEPTOR(param) &&
1467 !IS_PSTATE_PROPOSER(param) &&
1468 (param->phase & phase)) {
1469 *length += sprintf(output_buf, "%s=%s",
1470 param->name, param->value);
1471 *length += 1;
1472 output_buf = textbuf + *length;
1473 SET_PSTATE_PROPOSER(param);
1474 iscsi_check_proposer_for_optional_reply(param,
1475 keys_workaround);
1476 pr_debug("Sending key: %s=%s\n",
1477 param->name, param->value);
1478 }
1479 }
1480
1481 list_for_each_entry(er, ¶m_list->extra_response_list, er_list) {
1482 *length += sprintf(output_buf, "%s=%s", er->key, er->value);
1483 *length += 1;
1484 output_buf = textbuf + *length;
1485 pr_debug("Sending key: %s=%s\n", er->key, er->value);
1486 }
1487 iscsi_release_extra_responses(param_list);
1488
1489 return 0;
1490 }
1491
iscsi_check_negotiated_keys(struct iscsi_param_list * param_list)1492 int iscsi_check_negotiated_keys(struct iscsi_param_list *param_list)
1493 {
1494 int ret = 0;
1495 struct iscsi_param *param;
1496
1497 list_for_each_entry(param, ¶m_list->param_list, p_list) {
1498 if (IS_PSTATE_NEGOTIATE(param) &&
1499 IS_PSTATE_PROPOSER(param) &&
1500 !IS_PSTATE_RESPONSE_GOT(param) &&
1501 !IS_PSTATE_REPLY_OPTIONAL(param) &&
1502 !IS_PHASE_DECLARATIVE(param)) {
1503 pr_err("No response for proposed key \"%s\".\n",
1504 param->name);
1505 ret = -1;
1506 }
1507 }
1508
1509 return ret;
1510 }
1511
iscsi_change_param_value(char * keyvalue,struct iscsi_param_list * param_list,int check_key)1512 int iscsi_change_param_value(
1513 char *keyvalue,
1514 struct iscsi_param_list *param_list,
1515 int check_key)
1516 {
1517 char *key = NULL, *value = NULL;
1518 struct iscsi_param *param;
1519 int sender = 0;
1520
1521 if (iscsi_extract_key_value(keyvalue, &key, &value) < 0)
1522 return -1;
1523
1524 if (!check_key) {
1525 param = __iscsi_check_key(keyvalue, sender, param_list);
1526 if (!param)
1527 return -1;
1528 } else {
1529 param = iscsi_check_key(keyvalue, 0, sender, param_list);
1530 if (!param)
1531 return -1;
1532
1533 param->set_param = 1;
1534 if (iscsi_check_value(param, value) < 0) {
1535 param->set_param = 0;
1536 return -1;
1537 }
1538 param->set_param = 0;
1539 }
1540
1541 if (iscsi_update_param_value(param, value) < 0)
1542 return -1;
1543
1544 return 0;
1545 }
1546
iscsi_set_connection_parameters(struct iscsi_conn_ops * ops,struct iscsi_param_list * param_list)1547 void iscsi_set_connection_parameters(
1548 struct iscsi_conn_ops *ops,
1549 struct iscsi_param_list *param_list)
1550 {
1551 char *tmpptr;
1552 struct iscsi_param *param;
1553
1554 pr_debug("---------------------------------------------------"
1555 "---------------\n");
1556 list_for_each_entry(param, ¶m_list->param_list, p_list) {
1557 /*
1558 * Special case to set MAXXMITDATASEGMENTLENGTH from the
1559 * target requested MaxRecvDataSegmentLength, even though
1560 * this key is not sent over the wire.
1561 */
1562 if (!strcmp(param->name, MAXXMITDATASEGMENTLENGTH)) {
1563 ops->MaxXmitDataSegmentLength =
1564 simple_strtoul(param->value, &tmpptr, 0);
1565 pr_debug("MaxXmitDataSegmentLength: %s\n",
1566 param->value);
1567 }
1568
1569 if (!IS_PSTATE_ACCEPTOR(param) && !IS_PSTATE_PROPOSER(param))
1570 continue;
1571 if (!strcmp(param->name, AUTHMETHOD)) {
1572 pr_debug("AuthMethod: %s\n",
1573 param->value);
1574 } else if (!strcmp(param->name, HEADERDIGEST)) {
1575 ops->HeaderDigest = !strcmp(param->value, CRC32C);
1576 pr_debug("HeaderDigest: %s\n",
1577 param->value);
1578 } else if (!strcmp(param->name, DATADIGEST)) {
1579 ops->DataDigest = !strcmp(param->value, CRC32C);
1580 pr_debug("DataDigest: %s\n",
1581 param->value);
1582 } else if (!strcmp(param->name, MAXRECVDATASEGMENTLENGTH)) {
1583 /*
1584 * At this point iscsi_check_acceptor_state() will have
1585 * set ops->MaxRecvDataSegmentLength from the original
1586 * initiator provided value.
1587 */
1588 pr_debug("MaxRecvDataSegmentLength: %u\n",
1589 ops->MaxRecvDataSegmentLength);
1590 } else if (!strcmp(param->name, INITIATORRECVDATASEGMENTLENGTH)) {
1591 ops->InitiatorRecvDataSegmentLength =
1592 simple_strtoul(param->value, &tmpptr, 0);
1593 pr_debug("InitiatorRecvDataSegmentLength: %s\n",
1594 param->value);
1595 ops->MaxRecvDataSegmentLength =
1596 ops->InitiatorRecvDataSegmentLength;
1597 pr_debug("Set MRDSL from InitiatorRecvDataSegmentLength\n");
1598 } else if (!strcmp(param->name, TARGETRECVDATASEGMENTLENGTH)) {
1599 ops->TargetRecvDataSegmentLength =
1600 simple_strtoul(param->value, &tmpptr, 0);
1601 pr_debug("TargetRecvDataSegmentLength: %s\n",
1602 param->value);
1603 ops->MaxXmitDataSegmentLength =
1604 ops->TargetRecvDataSegmentLength;
1605 pr_debug("Set MXDSL from TargetRecvDataSegmentLength\n");
1606 }
1607 }
1608 pr_debug("----------------------------------------------------"
1609 "--------------\n");
1610 }
1611
iscsi_set_session_parameters(struct iscsi_sess_ops * ops,struct iscsi_param_list * param_list,int leading)1612 void iscsi_set_session_parameters(
1613 struct iscsi_sess_ops *ops,
1614 struct iscsi_param_list *param_list,
1615 int leading)
1616 {
1617 char *tmpptr;
1618 struct iscsi_param *param;
1619
1620 pr_debug("----------------------------------------------------"
1621 "--------------\n");
1622 list_for_each_entry(param, ¶m_list->param_list, p_list) {
1623 if (!IS_PSTATE_ACCEPTOR(param) && !IS_PSTATE_PROPOSER(param))
1624 continue;
1625 if (!strcmp(param->name, INITIATORNAME)) {
1626 if (!param->value)
1627 continue;
1628 if (leading)
1629 snprintf(ops->InitiatorName,
1630 sizeof(ops->InitiatorName),
1631 "%s", param->value);
1632 pr_debug("InitiatorName: %s\n",
1633 param->value);
1634 } else if (!strcmp(param->name, INITIATORALIAS)) {
1635 if (!param->value)
1636 continue;
1637 snprintf(ops->InitiatorAlias,
1638 sizeof(ops->InitiatorAlias),
1639 "%s", param->value);
1640 pr_debug("InitiatorAlias: %s\n",
1641 param->value);
1642 } else if (!strcmp(param->name, TARGETNAME)) {
1643 if (!param->value)
1644 continue;
1645 if (leading)
1646 snprintf(ops->TargetName,
1647 sizeof(ops->TargetName),
1648 "%s", param->value);
1649 pr_debug("TargetName: %s\n",
1650 param->value);
1651 } else if (!strcmp(param->name, TARGETALIAS)) {
1652 if (!param->value)
1653 continue;
1654 snprintf(ops->TargetAlias, sizeof(ops->TargetAlias),
1655 "%s", param->value);
1656 pr_debug("TargetAlias: %s\n",
1657 param->value);
1658 } else if (!strcmp(param->name, TARGETPORTALGROUPTAG)) {
1659 ops->TargetPortalGroupTag =
1660 simple_strtoul(param->value, &tmpptr, 0);
1661 pr_debug("TargetPortalGroupTag: %s\n",
1662 param->value);
1663 } else if (!strcmp(param->name, MAXCONNECTIONS)) {
1664 ops->MaxConnections =
1665 simple_strtoul(param->value, &tmpptr, 0);
1666 pr_debug("MaxConnections: %s\n",
1667 param->value);
1668 } else if (!strcmp(param->name, INITIALR2T)) {
1669 ops->InitialR2T = !strcmp(param->value, YES);
1670 pr_debug("InitialR2T: %s\n",
1671 param->value);
1672 } else if (!strcmp(param->name, IMMEDIATEDATA)) {
1673 ops->ImmediateData = !strcmp(param->value, YES);
1674 pr_debug("ImmediateData: %s\n",
1675 param->value);
1676 } else if (!strcmp(param->name, MAXBURSTLENGTH)) {
1677 ops->MaxBurstLength =
1678 simple_strtoul(param->value, &tmpptr, 0);
1679 pr_debug("MaxBurstLength: %s\n",
1680 param->value);
1681 } else if (!strcmp(param->name, FIRSTBURSTLENGTH)) {
1682 ops->FirstBurstLength =
1683 simple_strtoul(param->value, &tmpptr, 0);
1684 pr_debug("FirstBurstLength: %s\n",
1685 param->value);
1686 } else if (!strcmp(param->name, DEFAULTTIME2WAIT)) {
1687 ops->DefaultTime2Wait =
1688 simple_strtoul(param->value, &tmpptr, 0);
1689 pr_debug("DefaultTime2Wait: %s\n",
1690 param->value);
1691 } else if (!strcmp(param->name, DEFAULTTIME2RETAIN)) {
1692 ops->DefaultTime2Retain =
1693 simple_strtoul(param->value, &tmpptr, 0);
1694 pr_debug("DefaultTime2Retain: %s\n",
1695 param->value);
1696 } else if (!strcmp(param->name, MAXOUTSTANDINGR2T)) {
1697 ops->MaxOutstandingR2T =
1698 simple_strtoul(param->value, &tmpptr, 0);
1699 pr_debug("MaxOutstandingR2T: %s\n",
1700 param->value);
1701 } else if (!strcmp(param->name, DATAPDUINORDER)) {
1702 ops->DataPDUInOrder = !strcmp(param->value, YES);
1703 pr_debug("DataPDUInOrder: %s\n",
1704 param->value);
1705 } else if (!strcmp(param->name, DATASEQUENCEINORDER)) {
1706 ops->DataSequenceInOrder = !strcmp(param->value, YES);
1707 pr_debug("DataSequenceInOrder: %s\n",
1708 param->value);
1709 } else if (!strcmp(param->name, ERRORRECOVERYLEVEL)) {
1710 ops->ErrorRecoveryLevel =
1711 simple_strtoul(param->value, &tmpptr, 0);
1712 pr_debug("ErrorRecoveryLevel: %s\n",
1713 param->value);
1714 } else if (!strcmp(param->name, SESSIONTYPE)) {
1715 ops->SessionType = !strcmp(param->value, DISCOVERY);
1716 pr_debug("SessionType: %s\n",
1717 param->value);
1718 } else if (!strcmp(param->name, RDMAEXTENSIONS)) {
1719 ops->RDMAExtensions = !strcmp(param->value, YES);
1720 pr_debug("RDMAExtensions: %s\n",
1721 param->value);
1722 }
1723 }
1724 pr_debug("----------------------------------------------------"
1725 "--------------\n");
1726
1727 }
1728