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21#include <linux/slab.h>
22
23#include "iscsi_target_core.h"
24#include "iscsi_target_util.h"
25#include "iscsi_target_parameters.h"
26
27int iscsi_login_rx_data(
28 struct iscsi_conn *conn,
29 char *buf,
30 int length)
31{
32 int rx_got;
33 struct kvec iov;
34
35 memset(&iov, 0, sizeof(struct kvec));
36 iov.iov_len = length;
37 iov.iov_base = buf;
38
39
40
41
42
43
44 conn->of_marker += length;
45
46 rx_got = rx_data(conn, &iov, 1, length);
47 if (rx_got != length) {
48 pr_err("rx_data returned %d, expecting %d.\n",
49 rx_got, length);
50 return -1;
51 }
52
53 return 0 ;
54}
55
56int iscsi_login_tx_data(
57 struct iscsi_conn *conn,
58 char *pdu_buf,
59 char *text_buf,
60 int text_length)
61{
62 int length, tx_sent;
63 struct kvec iov[2];
64
65 length = (ISCSI_HDR_LEN + text_length);
66
67 memset(&iov[0], 0, 2 * sizeof(struct kvec));
68 iov[0].iov_len = ISCSI_HDR_LEN;
69 iov[0].iov_base = pdu_buf;
70 iov[1].iov_len = text_length;
71 iov[1].iov_base = text_buf;
72
73
74
75
76
77
78 conn->if_marker += length;
79
80 tx_sent = tx_data(conn, &iov[0], 2, length);
81 if (tx_sent != length) {
82 pr_err("tx_data returned %d, expecting %d.\n",
83 tx_sent, length);
84 return -1;
85 }
86
87 return 0;
88}
89
90void iscsi_dump_conn_ops(struct iscsi_conn_ops *conn_ops)
91{
92 pr_debug("HeaderDigest: %s\n", (conn_ops->HeaderDigest) ?
93 "CRC32C" : "None");
94 pr_debug("DataDigest: %s\n", (conn_ops->DataDigest) ?
95 "CRC32C" : "None");
96 pr_debug("MaxRecvDataSegmentLength: %u\n",
97 conn_ops->MaxRecvDataSegmentLength);
98 pr_debug("OFMarker: %s\n", (conn_ops->OFMarker) ? "Yes" : "No");
99 pr_debug("IFMarker: %s\n", (conn_ops->IFMarker) ? "Yes" : "No");
100 if (conn_ops->OFMarker)
101 pr_debug("OFMarkInt: %u\n", conn_ops->OFMarkInt);
102 if (conn_ops->IFMarker)
103 pr_debug("IFMarkInt: %u\n", conn_ops->IFMarkInt);
104}
105
106void iscsi_dump_sess_ops(struct iscsi_sess_ops *sess_ops)
107{
108 pr_debug("InitiatorName: %s\n", sess_ops->InitiatorName);
109 pr_debug("InitiatorAlias: %s\n", sess_ops->InitiatorAlias);
110 pr_debug("TargetName: %s\n", sess_ops->TargetName);
111 pr_debug("TargetAlias: %s\n", sess_ops->TargetAlias);
112 pr_debug("TargetPortalGroupTag: %hu\n",
113 sess_ops->TargetPortalGroupTag);
114 pr_debug("MaxConnections: %hu\n", sess_ops->MaxConnections);
115 pr_debug("InitialR2T: %s\n",
116 (sess_ops->InitialR2T) ? "Yes" : "No");
117 pr_debug("ImmediateData: %s\n", (sess_ops->ImmediateData) ?
118 "Yes" : "No");
119 pr_debug("MaxBurstLength: %u\n", sess_ops->MaxBurstLength);
120 pr_debug("FirstBurstLength: %u\n", sess_ops->FirstBurstLength);
121 pr_debug("DefaultTime2Wait: %hu\n", sess_ops->DefaultTime2Wait);
122 pr_debug("DefaultTime2Retain: %hu\n",
123 sess_ops->DefaultTime2Retain);
124 pr_debug("MaxOutstandingR2T: %hu\n",
125 sess_ops->MaxOutstandingR2T);
126 pr_debug("DataPDUInOrder: %s\n",
127 (sess_ops->DataPDUInOrder) ? "Yes" : "No");
128 pr_debug("DataSequenceInOrder: %s\n",
129 (sess_ops->DataSequenceInOrder) ? "Yes" : "No");
130 pr_debug("ErrorRecoveryLevel: %hu\n",
131 sess_ops->ErrorRecoveryLevel);
132 pr_debug("SessionType: %s\n", (sess_ops->SessionType) ?
133 "Discovery" : "Normal");
134}
135
136void iscsi_print_params(struct iscsi_param_list *param_list)
137{
138 struct iscsi_param *param;
139
140 list_for_each_entry(param, ¶m_list->param_list, p_list)
141 pr_debug("%s: %s\n", param->name, param->value);
142}
143
144static struct iscsi_param *iscsi_set_default_param(struct iscsi_param_list *param_list,
145 char *name, char *value, u8 phase, u8 scope, u8 sender,
146 u16 type_range, u8 use)
147{
148 struct iscsi_param *param = NULL;
149
150 param = kzalloc(sizeof(struct iscsi_param), GFP_KERNEL);
151 if (!param) {
152 pr_err("Unable to allocate memory for parameter.\n");
153 goto out;
154 }
155 INIT_LIST_HEAD(¶m->p_list);
156
157 param->name = kzalloc(strlen(name) + 1, GFP_KERNEL);
158 if (!param->name) {
159 pr_err("Unable to allocate memory for parameter name.\n");
160 goto out;
161 }
162
163 param->value = kzalloc(strlen(value) + 1, GFP_KERNEL);
164 if (!param->value) {
165 pr_err("Unable to allocate memory for parameter value.\n");
166 goto out;
167 }
168
169 memcpy(param->name, name, strlen(name));
170 param->name[strlen(name)] = '\0';
171 memcpy(param->value, value, strlen(value));
172 param->value[strlen(value)] = '\0';
173 param->phase = phase;
174 param->scope = scope;
175 param->sender = sender;
176 param->use = use;
177 param->type_range = type_range;
178
179 switch (param->type_range) {
180 case TYPERANGE_BOOL_AND:
181 param->type = TYPE_BOOL_AND;
182 break;
183 case TYPERANGE_BOOL_OR:
184 param->type = TYPE_BOOL_OR;
185 break;
186 case TYPERANGE_0_TO_2:
187 case TYPERANGE_0_TO_3600:
188 case TYPERANGE_0_TO_32767:
189 case TYPERANGE_0_TO_65535:
190 case TYPERANGE_1_TO_65535:
191 case TYPERANGE_2_TO_3600:
192 case TYPERANGE_512_TO_16777215:
193 param->type = TYPE_NUMBER;
194 break;
195 case TYPERANGE_AUTH:
196 case TYPERANGE_DIGEST:
197 param->type = TYPE_VALUE_LIST | TYPE_STRING;
198 break;
199 case TYPERANGE_MARKINT:
200 param->type = TYPE_NUMBER_RANGE;
201 param->type_range |= TYPERANGE_1_TO_65535;
202 break;
203 case TYPERANGE_ISCSINAME:
204 case TYPERANGE_SESSIONTYPE:
205 case TYPERANGE_TARGETADDRESS:
206 case TYPERANGE_UTF8:
207 param->type = TYPE_STRING;
208 break;
209 default:
210 pr_err("Unknown type_range 0x%02x\n",
211 param->type_range);
212 goto out;
213 }
214 list_add_tail(¶m->p_list, ¶m_list->param_list);
215
216 return param;
217out:
218 if (param) {
219 kfree(param->value);
220 kfree(param->name);
221 kfree(param);
222 }
223
224 return NULL;
225}
226
227
228int iscsi_create_default_params(struct iscsi_param_list **param_list_ptr)
229{
230 struct iscsi_param *param = NULL;
231 struct iscsi_param_list *pl;
232
233 pl = kzalloc(sizeof(struct iscsi_param_list), GFP_KERNEL);
234 if (!pl) {
235 pr_err("Unable to allocate memory for"
236 " struct iscsi_param_list.\n");
237 return -1 ;
238 }
239 INIT_LIST_HEAD(&pl->param_list);
240 INIT_LIST_HEAD(&pl->extra_response_list);
241
242
243
244
245
246
247
248
249
250
251
252
253 param = iscsi_set_default_param(pl, AUTHMETHOD, INITIAL_AUTHMETHOD,
254 PHASE_SECURITY, SCOPE_CONNECTION_ONLY, SENDER_BOTH,
255 TYPERANGE_AUTH, USE_INITIAL_ONLY);
256 if (!param)
257 goto out;
258
259 param = iscsi_set_default_param(pl, HEADERDIGEST, INITIAL_HEADERDIGEST,
260 PHASE_OPERATIONAL, SCOPE_CONNECTION_ONLY, SENDER_BOTH,
261 TYPERANGE_DIGEST, USE_INITIAL_ONLY);
262 if (!param)
263 goto out;
264
265 param = iscsi_set_default_param(pl, DATADIGEST, INITIAL_DATADIGEST,
266 PHASE_OPERATIONAL, SCOPE_CONNECTION_ONLY, SENDER_BOTH,
267 TYPERANGE_DIGEST, USE_INITIAL_ONLY);
268 if (!param)
269 goto out;
270
271 param = iscsi_set_default_param(pl, MAXCONNECTIONS,
272 INITIAL_MAXCONNECTIONS, PHASE_OPERATIONAL,
273 SCOPE_SESSION_WIDE, SENDER_BOTH,
274 TYPERANGE_1_TO_65535, USE_LEADING_ONLY);
275 if (!param)
276 goto out;
277
278 param = iscsi_set_default_param(pl, SENDTARGETS, INITIAL_SENDTARGETS,
279 PHASE_FFP0, SCOPE_SESSION_WIDE, SENDER_INITIATOR,
280 TYPERANGE_UTF8, 0);
281 if (!param)
282 goto out;
283
284 param = iscsi_set_default_param(pl, TARGETNAME, INITIAL_TARGETNAME,
285 PHASE_DECLARATIVE, SCOPE_SESSION_WIDE, SENDER_BOTH,
286 TYPERANGE_ISCSINAME, USE_ALL);
287 if (!param)
288 goto out;
289
290 param = iscsi_set_default_param(pl, INITIATORNAME,
291 INITIAL_INITIATORNAME, PHASE_DECLARATIVE,
292 SCOPE_SESSION_WIDE, SENDER_INITIATOR,
293 TYPERANGE_ISCSINAME, USE_INITIAL_ONLY);
294 if (!param)
295 goto out;
296
297 param = iscsi_set_default_param(pl, TARGETALIAS, INITIAL_TARGETALIAS,
298 PHASE_DECLARATIVE, SCOPE_SESSION_WIDE, SENDER_TARGET,
299 TYPERANGE_UTF8, USE_ALL);
300 if (!param)
301 goto out;
302
303 param = iscsi_set_default_param(pl, INITIATORALIAS,
304 INITIAL_INITIATORALIAS, PHASE_DECLARATIVE,
305 SCOPE_SESSION_WIDE, SENDER_INITIATOR, TYPERANGE_UTF8,
306 USE_ALL);
307 if (!param)
308 goto out;
309
310 param = iscsi_set_default_param(pl, TARGETADDRESS,
311 INITIAL_TARGETADDRESS, PHASE_DECLARATIVE,
312 SCOPE_SESSION_WIDE, SENDER_TARGET,
313 TYPERANGE_TARGETADDRESS, USE_ALL);
314 if (!param)
315 goto out;
316
317 param = iscsi_set_default_param(pl, TARGETPORTALGROUPTAG,
318 INITIAL_TARGETPORTALGROUPTAG,
319 PHASE_DECLARATIVE, SCOPE_SESSION_WIDE, SENDER_TARGET,
320 TYPERANGE_0_TO_65535, USE_INITIAL_ONLY);
321 if (!param)
322 goto out;
323
324 param = iscsi_set_default_param(pl, INITIALR2T, INITIAL_INITIALR2T,
325 PHASE_OPERATIONAL, SCOPE_SESSION_WIDE, SENDER_BOTH,
326 TYPERANGE_BOOL_OR, USE_LEADING_ONLY);
327 if (!param)
328 goto out;
329
330 param = iscsi_set_default_param(pl, IMMEDIATEDATA,
331 INITIAL_IMMEDIATEDATA, PHASE_OPERATIONAL,
332 SCOPE_SESSION_WIDE, SENDER_BOTH, TYPERANGE_BOOL_AND,
333 USE_LEADING_ONLY);
334 if (!param)
335 goto out;
336
337 param = iscsi_set_default_param(pl, MAXRECVDATASEGMENTLENGTH,
338 INITIAL_MAXRECVDATASEGMENTLENGTH,
339 PHASE_OPERATIONAL, SCOPE_CONNECTION_ONLY, SENDER_BOTH,
340 TYPERANGE_512_TO_16777215, USE_ALL);
341 if (!param)
342 goto out;
343
344 param = iscsi_set_default_param(pl, MAXBURSTLENGTH,
345 INITIAL_MAXBURSTLENGTH, PHASE_OPERATIONAL,
346 SCOPE_SESSION_WIDE, SENDER_BOTH,
347 TYPERANGE_512_TO_16777215, USE_LEADING_ONLY);
348 if (!param)
349 goto out;
350
351 param = iscsi_set_default_param(pl, FIRSTBURSTLENGTH,
352 INITIAL_FIRSTBURSTLENGTH,
353 PHASE_OPERATIONAL, SCOPE_SESSION_WIDE, SENDER_BOTH,
354 TYPERANGE_512_TO_16777215, USE_LEADING_ONLY);
355 if (!param)
356 goto out;
357
358 param = iscsi_set_default_param(pl, DEFAULTTIME2WAIT,
359 INITIAL_DEFAULTTIME2WAIT,
360 PHASE_OPERATIONAL, SCOPE_SESSION_WIDE, SENDER_BOTH,
361 TYPERANGE_0_TO_3600, USE_LEADING_ONLY);
362 if (!param)
363 goto out;
364
365 param = iscsi_set_default_param(pl, DEFAULTTIME2RETAIN,
366 INITIAL_DEFAULTTIME2RETAIN,
367 PHASE_OPERATIONAL, SCOPE_SESSION_WIDE, SENDER_BOTH,
368 TYPERANGE_0_TO_3600, USE_LEADING_ONLY);
369 if (!param)
370 goto out;
371
372 param = iscsi_set_default_param(pl, MAXOUTSTANDINGR2T,
373 INITIAL_MAXOUTSTANDINGR2T,
374 PHASE_OPERATIONAL, SCOPE_SESSION_WIDE, SENDER_BOTH,
375 TYPERANGE_1_TO_65535, USE_LEADING_ONLY);
376 if (!param)
377 goto out;
378
379 param = iscsi_set_default_param(pl, DATAPDUINORDER,
380 INITIAL_DATAPDUINORDER, PHASE_OPERATIONAL,
381 SCOPE_SESSION_WIDE, SENDER_BOTH, TYPERANGE_BOOL_OR,
382 USE_LEADING_ONLY);
383 if (!param)
384 goto out;
385
386 param = iscsi_set_default_param(pl, DATASEQUENCEINORDER,
387 INITIAL_DATASEQUENCEINORDER,
388 PHASE_OPERATIONAL, SCOPE_SESSION_WIDE, SENDER_BOTH,
389 TYPERANGE_BOOL_OR, USE_LEADING_ONLY);
390 if (!param)
391 goto out;
392
393 param = iscsi_set_default_param(pl, ERRORRECOVERYLEVEL,
394 INITIAL_ERRORRECOVERYLEVEL,
395 PHASE_OPERATIONAL, SCOPE_SESSION_WIDE, SENDER_BOTH,
396 TYPERANGE_0_TO_2, USE_LEADING_ONLY);
397 if (!param)
398 goto out;
399
400 param = iscsi_set_default_param(pl, SESSIONTYPE, INITIAL_SESSIONTYPE,
401 PHASE_DECLARATIVE, SCOPE_SESSION_WIDE, SENDER_INITIATOR,
402 TYPERANGE_SESSIONTYPE, USE_LEADING_ONLY);
403 if (!param)
404 goto out;
405
406 param = iscsi_set_default_param(pl, IFMARKER, INITIAL_IFMARKER,
407 PHASE_OPERATIONAL, SCOPE_CONNECTION_ONLY, SENDER_BOTH,
408 TYPERANGE_BOOL_AND, USE_INITIAL_ONLY);
409 if (!param)
410 goto out;
411
412 param = iscsi_set_default_param(pl, OFMARKER, INITIAL_OFMARKER,
413 PHASE_OPERATIONAL, SCOPE_CONNECTION_ONLY, SENDER_BOTH,
414 TYPERANGE_BOOL_AND, USE_INITIAL_ONLY);
415 if (!param)
416 goto out;
417
418 param = iscsi_set_default_param(pl, IFMARKINT, INITIAL_IFMARKINT,
419 PHASE_OPERATIONAL, SCOPE_CONNECTION_ONLY, SENDER_BOTH,
420 TYPERANGE_MARKINT, USE_INITIAL_ONLY);
421 if (!param)
422 goto out;
423
424 param = iscsi_set_default_param(pl, OFMARKINT, INITIAL_OFMARKINT,
425 PHASE_OPERATIONAL, SCOPE_CONNECTION_ONLY, SENDER_BOTH,
426 TYPERANGE_MARKINT, USE_INITIAL_ONLY);
427 if (!param)
428 goto out;
429
430 *param_list_ptr = pl;
431 return 0;
432out:
433 iscsi_release_param_list(pl);
434 return -1;
435}
436
437int iscsi_set_keys_to_negotiate(
438 int sessiontype,
439 struct iscsi_param_list *param_list)
440{
441 struct iscsi_param *param;
442
443 list_for_each_entry(param, ¶m_list->param_list, p_list) {
444 param->state = 0;
445 if (!strcmp(param->name, AUTHMETHOD)) {
446 SET_PSTATE_NEGOTIATE(param);
447 } else if (!strcmp(param->name, HEADERDIGEST)) {
448 SET_PSTATE_NEGOTIATE(param);
449 } else if (!strcmp(param->name, DATADIGEST)) {
450 SET_PSTATE_NEGOTIATE(param);
451 } else if (!strcmp(param->name, MAXCONNECTIONS)) {
452 SET_PSTATE_NEGOTIATE(param);
453 } else if (!strcmp(param->name, TARGETNAME)) {
454 continue;
455 } else if (!strcmp(param->name, INITIATORNAME)) {
456 continue;
457 } else if (!strcmp(param->name, TARGETALIAS)) {
458 if (param->value)
459 SET_PSTATE_NEGOTIATE(param);
460 } else if (!strcmp(param->name, INITIATORALIAS)) {
461 continue;
462 } else if (!strcmp(param->name, TARGETPORTALGROUPTAG)) {
463 SET_PSTATE_NEGOTIATE(param);
464 } else if (!strcmp(param->name, INITIALR2T)) {
465 SET_PSTATE_NEGOTIATE(param);
466 } else if (!strcmp(param->name, IMMEDIATEDATA)) {
467 SET_PSTATE_NEGOTIATE(param);
468 } else if (!strcmp(param->name, MAXRECVDATASEGMENTLENGTH)) {
469 SET_PSTATE_NEGOTIATE(param);
470 } else if (!strcmp(param->name, MAXBURSTLENGTH)) {
471 SET_PSTATE_NEGOTIATE(param);
472 } else if (!strcmp(param->name, FIRSTBURSTLENGTH)) {
473 SET_PSTATE_NEGOTIATE(param);
474 } else if (!strcmp(param->name, DEFAULTTIME2WAIT)) {
475 SET_PSTATE_NEGOTIATE(param);
476 } else if (!strcmp(param->name, DEFAULTTIME2RETAIN)) {
477 SET_PSTATE_NEGOTIATE(param);
478 } else if (!strcmp(param->name, MAXOUTSTANDINGR2T)) {
479 SET_PSTATE_NEGOTIATE(param);
480 } else if (!strcmp(param->name, DATAPDUINORDER)) {
481 SET_PSTATE_NEGOTIATE(param);
482 } else if (!strcmp(param->name, DATASEQUENCEINORDER)) {
483 SET_PSTATE_NEGOTIATE(param);
484 } else if (!strcmp(param->name, ERRORRECOVERYLEVEL)) {
485 SET_PSTATE_NEGOTIATE(param);
486 } else if (!strcmp(param->name, SESSIONTYPE)) {
487 SET_PSTATE_NEGOTIATE(param);
488 } else if (!strcmp(param->name, IFMARKER)) {
489 SET_PSTATE_NEGOTIATE(param);
490 } else if (!strcmp(param->name, OFMARKER)) {
491 SET_PSTATE_NEGOTIATE(param);
492 } else if (!strcmp(param->name, IFMARKINT)) {
493 SET_PSTATE_NEGOTIATE(param);
494 } else if (!strcmp(param->name, OFMARKINT)) {
495 SET_PSTATE_NEGOTIATE(param);
496 }
497 }
498
499 return 0;
500}
501
502int iscsi_set_keys_irrelevant_for_discovery(
503 struct iscsi_param_list *param_list)
504{
505 struct iscsi_param *param;
506
507 list_for_each_entry(param, ¶m_list->param_list, p_list) {
508 if (!strcmp(param->name, MAXCONNECTIONS))
509 param->state &= ~PSTATE_NEGOTIATE;
510 else if (!strcmp(param->name, INITIALR2T))
511 param->state &= ~PSTATE_NEGOTIATE;
512 else if (!strcmp(param->name, IMMEDIATEDATA))
513 param->state &= ~PSTATE_NEGOTIATE;
514 else if (!strcmp(param->name, MAXBURSTLENGTH))
515 param->state &= ~PSTATE_NEGOTIATE;
516 else if (!strcmp(param->name, FIRSTBURSTLENGTH))
517 param->state &= ~PSTATE_NEGOTIATE;
518 else if (!strcmp(param->name, MAXOUTSTANDINGR2T))
519 param->state &= ~PSTATE_NEGOTIATE;
520 else if (!strcmp(param->name, DATAPDUINORDER))
521 param->state &= ~PSTATE_NEGOTIATE;
522 else if (!strcmp(param->name, DATASEQUENCEINORDER))
523 param->state &= ~PSTATE_NEGOTIATE;
524 else if (!strcmp(param->name, ERRORRECOVERYLEVEL))
525 param->state &= ~PSTATE_NEGOTIATE;
526 else if (!strcmp(param->name, DEFAULTTIME2WAIT))
527 param->state &= ~PSTATE_NEGOTIATE;
528 else if (!strcmp(param->name, DEFAULTTIME2RETAIN))
529 param->state &= ~PSTATE_NEGOTIATE;
530 else if (!strcmp(param->name, IFMARKER))
531 param->state &= ~PSTATE_NEGOTIATE;
532 else if (!strcmp(param->name, OFMARKER))
533 param->state &= ~PSTATE_NEGOTIATE;
534 else if (!strcmp(param->name, IFMARKINT))
535 param->state &= ~PSTATE_NEGOTIATE;
536 else if (!strcmp(param->name, OFMARKINT))
537 param->state &= ~PSTATE_NEGOTIATE;
538 }
539
540 return 0;
541}
542
543int iscsi_copy_param_list(
544 struct iscsi_param_list **dst_param_list,
545 struct iscsi_param_list *src_param_list,
546 int leading)
547{
548 struct iscsi_param *param = NULL;
549 struct iscsi_param *new_param = NULL;
550 struct iscsi_param_list *param_list = NULL;
551
552 param_list = kzalloc(sizeof(struct iscsi_param_list), GFP_KERNEL);
553 if (!param_list) {
554 pr_err("Unable to allocate memory for struct iscsi_param_list.\n");
555 goto err_out;
556 }
557 INIT_LIST_HEAD(¶m_list->param_list);
558 INIT_LIST_HEAD(¶m_list->extra_response_list);
559
560 list_for_each_entry(param, &src_param_list->param_list, p_list) {
561 if (!leading && (param->scope & SCOPE_SESSION_WIDE)) {
562 if ((strcmp(param->name, "TargetName") != 0) &&
563 (strcmp(param->name, "InitiatorName") != 0) &&
564 (strcmp(param->name, "TargetPortalGroupTag") != 0))
565 continue;
566 }
567
568 new_param = kzalloc(sizeof(struct iscsi_param), GFP_KERNEL);
569 if (!new_param) {
570 pr_err("Unable to allocate memory for struct iscsi_param.\n");
571 goto err_out;
572 }
573
574 new_param->name = kstrdup(param->name, GFP_KERNEL);
575 new_param->value = kstrdup(param->value, GFP_KERNEL);
576 if (!new_param->value || !new_param->name) {
577 kfree(new_param->value);
578 kfree(new_param->name);
579 kfree(new_param);
580 pr_err("Unable to allocate memory for parameter name/value.\n");
581 goto err_out;
582 }
583
584 new_param->set_param = param->set_param;
585 new_param->phase = param->phase;
586 new_param->scope = param->scope;
587 new_param->sender = param->sender;
588 new_param->type = param->type;
589 new_param->use = param->use;
590 new_param->type_range = param->type_range;
591
592 list_add_tail(&new_param->p_list, ¶m_list->param_list);
593 }
594
595 if (!list_empty(¶m_list->param_list)) {
596 *dst_param_list = param_list;
597 } else {
598 pr_err("No parameters allocated.\n");
599 goto err_out;
600 }
601
602 return 0;
603
604err_out:
605 iscsi_release_param_list(param_list);
606 return -1;
607}
608
609static void iscsi_release_extra_responses(struct iscsi_param_list *param_list)
610{
611 struct iscsi_extra_response *er, *er_tmp;
612
613 list_for_each_entry_safe(er, er_tmp, ¶m_list->extra_response_list,
614 er_list) {
615 list_del(&er->er_list);
616 kfree(er);
617 }
618}
619
620void iscsi_release_param_list(struct iscsi_param_list *param_list)
621{
622 struct iscsi_param *param, *param_tmp;
623
624 list_for_each_entry_safe(param, param_tmp, ¶m_list->param_list,
625 p_list) {
626 list_del(¶m->p_list);
627
628 kfree(param->name);
629 param->name = NULL;
630 kfree(param->value);
631 param->value = NULL;
632 kfree(param);
633 param = NULL;
634 }
635
636 iscsi_release_extra_responses(param_list);
637
638 kfree(param_list);
639}
640
641struct iscsi_param *iscsi_find_param_from_key(
642 char *key,
643 struct iscsi_param_list *param_list)
644{
645 struct iscsi_param *param;
646
647 if (!key || !param_list) {
648 pr_err("Key or parameter list pointer is NULL.\n");
649 return NULL;
650 }
651
652 list_for_each_entry(param, ¶m_list->param_list, p_list) {
653 if (!strcmp(key, param->name))
654 return param;
655 }
656
657 pr_err("Unable to locate key \"%s\".\n", key);
658 return NULL;
659}
660
661int iscsi_extract_key_value(char *textbuf, char **key, char **value)
662{
663 *value = strchr(textbuf, '=');
664 if (!*value) {
665 pr_err("Unable to locate \"=\" seperator for key,"
666 " ignoring request.\n");
667 return -1;
668 }
669
670 *key = textbuf;
671 **value = '\0';
672 *value = *value + 1;
673
674 return 0;
675}
676
677int iscsi_update_param_value(struct iscsi_param *param, char *value)
678{
679 kfree(param->value);
680
681 param->value = kzalloc(strlen(value) + 1, GFP_KERNEL);
682 if (!param->value) {
683 pr_err("Unable to allocate memory for value.\n");
684 return -1;
685 }
686
687 memcpy(param->value, value, strlen(value));
688 param->value[strlen(value)] = '\0';
689
690 pr_debug("iSCSI Parameter updated to %s=%s\n",
691 param->name, param->value);
692 return 0;
693}
694
695static int iscsi_add_notunderstood_response(
696 char *key,
697 char *value,
698 struct iscsi_param_list *param_list)
699{
700 struct iscsi_extra_response *extra_response;
701
702 if (strlen(value) > VALUE_MAXLEN) {
703 pr_err("Value for notunderstood key \"%s\" exceeds %d,"
704 " protocol error.\n", key, VALUE_MAXLEN);
705 return -1;
706 }
707
708 extra_response = kzalloc(sizeof(struct iscsi_extra_response), GFP_KERNEL);
709 if (!extra_response) {
710 pr_err("Unable to allocate memory for"
711 " struct iscsi_extra_response.\n");
712 return -1;
713 }
714 INIT_LIST_HEAD(&extra_response->er_list);
715
716 strncpy(extra_response->key, key, strlen(key) + 1);
717 strncpy(extra_response->value, NOTUNDERSTOOD,
718 strlen(NOTUNDERSTOOD) + 1);
719
720 list_add_tail(&extra_response->er_list,
721 ¶m_list->extra_response_list);
722 return 0;
723}
724
725static int iscsi_check_for_auth_key(char *key)
726{
727
728
729
730 if (!strcmp(key, "CHAP_A") || !strcmp(key, "CHAP_I") ||
731 !strcmp(key, "CHAP_C") || !strcmp(key, "CHAP_N") ||
732 !strcmp(key, "CHAP_R"))
733 return 1;
734
735
736
737
738 if (!strcmp(key, "SRP_U") || !strcmp(key, "SRP_N") ||
739 !strcmp(key, "SRP_g") || !strcmp(key, "SRP_s") ||
740 !strcmp(key, "SRP_A") || !strcmp(key, "SRP_B") ||
741 !strcmp(key, "SRP_M") || !strcmp(key, "SRP_HM"))
742 return 1;
743
744 return 0;
745}
746
747static void iscsi_check_proposer_for_optional_reply(struct iscsi_param *param)
748{
749 if (IS_TYPE_BOOL_AND(param)) {
750 if (!strcmp(param->value, NO))
751 SET_PSTATE_REPLY_OPTIONAL(param);
752 } else if (IS_TYPE_BOOL_OR(param)) {
753 if (!strcmp(param->value, YES))
754 SET_PSTATE_REPLY_OPTIONAL(param);
755
756
757
758 if (!strcmp(param->name, IMMEDIATEDATA))
759 SET_PSTATE_REPLY_OPTIONAL(param);
760 } else if (IS_TYPE_NUMBER(param)) {
761 if (!strcmp(param->name, MAXRECVDATASEGMENTLENGTH))
762 SET_PSTATE_REPLY_OPTIONAL(param);
763
764
765
766
767
768
769
770
771 if (!strcmp(param->name, MAXBURSTLENGTH))
772 SET_PSTATE_REPLY_OPTIONAL(param);
773 if (!strcmp(param->name, FIRSTBURSTLENGTH))
774 SET_PSTATE_REPLY_OPTIONAL(param);
775 if (!strcmp(param->name, DEFAULTTIME2WAIT))
776 SET_PSTATE_REPLY_OPTIONAL(param);
777 if (!strcmp(param->name, DEFAULTTIME2RETAIN))
778 SET_PSTATE_REPLY_OPTIONAL(param);
779
780
781
782 if (!strcmp(param->name, MAXCONNECTIONS))
783 SET_PSTATE_REPLY_OPTIONAL(param);
784 } else if (IS_PHASE_DECLARATIVE(param))
785 SET_PSTATE_REPLY_OPTIONAL(param);
786}
787
788static int iscsi_check_boolean_value(struct iscsi_param *param, char *value)
789{
790 if (strcmp(value, YES) && strcmp(value, NO)) {
791 pr_err("Illegal value for \"%s\", must be either"
792 " \"%s\" or \"%s\".\n", param->name, YES, NO);
793 return -1;
794 }
795
796 return 0;
797}
798
799static int iscsi_check_numerical_value(struct iscsi_param *param, char *value_ptr)
800{
801 char *tmpptr;
802 int value = 0;
803
804 value = simple_strtoul(value_ptr, &tmpptr, 0);
805
806
807#if 0
808 if (strspn(endptr, WHITE_SPACE) != strlen(endptr)) {
809 pr_err("Illegal value \"%s\" for \"%s\".\n",
810 value, param->name);
811 return -1;
812 }
813#endif
814 if (IS_TYPERANGE_0_TO_2(param)) {
815 if ((value < 0) || (value > 2)) {
816 pr_err("Illegal value for \"%s\", must be"
817 " between 0 and 2.\n", param->name);
818 return -1;
819 }
820 return 0;
821 }
822 if (IS_TYPERANGE_0_TO_3600(param)) {
823 if ((value < 0) || (value > 3600)) {
824 pr_err("Illegal value for \"%s\", must be"
825 " between 0 and 3600.\n", param->name);
826 return -1;
827 }
828 return 0;
829 }
830 if (IS_TYPERANGE_0_TO_32767(param)) {
831 if ((value < 0) || (value > 32767)) {
832 pr_err("Illegal value for \"%s\", must be"
833 " between 0 and 32767.\n", param->name);
834 return -1;
835 }
836 return 0;
837 }
838 if (IS_TYPERANGE_0_TO_65535(param)) {
839 if ((value < 0) || (value > 65535)) {
840 pr_err("Illegal value for \"%s\", must be"
841 " between 0 and 65535.\n", param->name);
842 return -1;
843 }
844 return 0;
845 }
846 if (IS_TYPERANGE_1_TO_65535(param)) {
847 if ((value < 1) || (value > 65535)) {
848 pr_err("Illegal value for \"%s\", must be"
849 " between 1 and 65535.\n", param->name);
850 return -1;
851 }
852 return 0;
853 }
854 if (IS_TYPERANGE_2_TO_3600(param)) {
855 if ((value < 2) || (value > 3600)) {
856 pr_err("Illegal value for \"%s\", must be"
857 " between 2 and 3600.\n", param->name);
858 return -1;
859 }
860 return 0;
861 }
862 if (IS_TYPERANGE_512_TO_16777215(param)) {
863 if ((value < 512) || (value > 16777215)) {
864 pr_err("Illegal value for \"%s\", must be"
865 " between 512 and 16777215.\n", param->name);
866 return -1;
867 }
868 return 0;
869 }
870
871 return 0;
872}
873
874static int iscsi_check_numerical_range_value(struct iscsi_param *param, char *value)
875{
876 char *left_val_ptr = NULL, *right_val_ptr = NULL;
877 char *tilde_ptr = NULL, *tmp_ptr = NULL;
878 u32 left_val, right_val, local_left_val, local_right_val;
879
880 if (strcmp(param->name, IFMARKINT) &&
881 strcmp(param->name, OFMARKINT)) {
882 pr_err("Only parameters \"%s\" or \"%s\" may contain a"
883 " numerical range value.\n", IFMARKINT, OFMARKINT);
884 return -1;
885 }
886
887 if (IS_PSTATE_PROPOSER(param))
888 return 0;
889
890 tilde_ptr = strchr(value, '~');
891 if (!tilde_ptr) {
892 pr_err("Unable to locate numerical range indicator"
893 " \"~\" for \"%s\".\n", param->name);
894 return -1;
895 }
896 *tilde_ptr = '\0';
897
898 left_val_ptr = value;
899 right_val_ptr = value + strlen(left_val_ptr) + 1;
900
901 if (iscsi_check_numerical_value(param, left_val_ptr) < 0)
902 return -1;
903 if (iscsi_check_numerical_value(param, right_val_ptr) < 0)
904 return -1;
905
906 left_val = simple_strtoul(left_val_ptr, &tmp_ptr, 0);
907 right_val = simple_strtoul(right_val_ptr, &tmp_ptr, 0);
908 *tilde_ptr = '~';
909
910 if (right_val < left_val) {
911 pr_err("Numerical range for parameter \"%s\" contains"
912 " a right value which is less than the left.\n",
913 param->name);
914 return -1;
915 }
916
917
918
919
920 tilde_ptr = strchr(param->value, '~');
921 if (!tilde_ptr) {
922 pr_err("Unable to locate numerical range indicator"
923 " \"~\" for \"%s\".\n", param->name);
924 return -1;
925 }
926 *tilde_ptr = '\0';
927
928 left_val_ptr = param->value;
929 right_val_ptr = param->value + strlen(left_val_ptr) + 1;
930
931 local_left_val = simple_strtoul(left_val_ptr, &tmp_ptr, 0);
932 local_right_val = simple_strtoul(right_val_ptr, &tmp_ptr, 0);
933 *tilde_ptr = '~';
934
935 if (param->set_param) {
936 if ((left_val < local_left_val) ||
937 (right_val < local_left_val)) {
938 pr_err("Passed value range \"%u~%u\" is below"
939 " minimum left value \"%u\" for key \"%s\","
940 " rejecting.\n", left_val, right_val,
941 local_left_val, param->name);
942 return -1;
943 }
944 } else {
945 if ((left_val < local_left_val) &&
946 (right_val < local_left_val)) {
947 pr_err("Received value range \"%u~%u\" is"
948 " below minimum left value \"%u\" for key"
949 " \"%s\", rejecting.\n", left_val, right_val,
950 local_left_val, param->name);
951 SET_PSTATE_REJECT(param);
952 if (iscsi_update_param_value(param, REJECT) < 0)
953 return -1;
954 }
955 }
956
957 return 0;
958}
959
960static int iscsi_check_string_or_list_value(struct iscsi_param *param, char *value)
961{
962 if (IS_PSTATE_PROPOSER(param))
963 return 0;
964
965 if (IS_TYPERANGE_AUTH_PARAM(param)) {
966 if (strcmp(value, KRB5) && strcmp(value, SPKM1) &&
967 strcmp(value, SPKM2) && strcmp(value, SRP) &&
968 strcmp(value, CHAP) && strcmp(value, NONE)) {
969 pr_err("Illegal value for \"%s\", must be"
970 " \"%s\", \"%s\", \"%s\", \"%s\", \"%s\""
971 " or \"%s\".\n", param->name, KRB5,
972 SPKM1, SPKM2, SRP, CHAP, NONE);
973 return -1;
974 }
975 }
976 if (IS_TYPERANGE_DIGEST_PARAM(param)) {
977 if (strcmp(value, CRC32C) && strcmp(value, NONE)) {
978 pr_err("Illegal value for \"%s\", must be"
979 " \"%s\" or \"%s\".\n", param->name,
980 CRC32C, NONE);
981 return -1;
982 }
983 }
984 if (IS_TYPERANGE_SESSIONTYPE(param)) {
985 if (strcmp(value, DISCOVERY) && strcmp(value, NORMAL)) {
986 pr_err("Illegal value for \"%s\", must be"
987 " \"%s\" or \"%s\".\n", param->name,
988 DISCOVERY, NORMAL);
989 return -1;
990 }
991 }
992
993 return 0;
994}
995
996
997
998
999
1000static char *iscsi_get_value_from_number_range(
1001 struct iscsi_param *param,
1002 char *value)
1003{
1004 char *end_ptr, *tilde_ptr1 = NULL, *tilde_ptr2 = NULL;
1005 u32 acceptor_right_value, proposer_right_value;
1006
1007 tilde_ptr1 = strchr(value, '~');
1008 if (!tilde_ptr1)
1009 return NULL;
1010 *tilde_ptr1++ = '\0';
1011 proposer_right_value = simple_strtoul(tilde_ptr1, &end_ptr, 0);
1012
1013 tilde_ptr2 = strchr(param->value, '~');
1014 if (!tilde_ptr2)
1015 return NULL;
1016 *tilde_ptr2++ = '\0';
1017 acceptor_right_value = simple_strtoul(tilde_ptr2, &end_ptr, 0);
1018
1019 return (acceptor_right_value >= proposer_right_value) ?
1020 tilde_ptr1 : tilde_ptr2;
1021}
1022
1023static char *iscsi_check_valuelist_for_support(
1024 struct iscsi_param *param,
1025 char *value)
1026{
1027 char *tmp1 = NULL, *tmp2 = NULL;
1028 char *acceptor_values = NULL, *proposer_values = NULL;
1029
1030 acceptor_values = param->value;
1031 proposer_values = value;
1032
1033 do {
1034 if (!proposer_values)
1035 return NULL;
1036 tmp1 = strchr(proposer_values, ',');
1037 if (tmp1)
1038 *tmp1 = '\0';
1039 acceptor_values = param->value;
1040 do {
1041 if (!acceptor_values) {
1042 if (tmp1)
1043 *tmp1 = ',';
1044 return NULL;
1045 }
1046 tmp2 = strchr(acceptor_values, ',');
1047 if (tmp2)
1048 *tmp2 = '\0';
1049 if (!acceptor_values || !proposer_values) {
1050 if (tmp1)
1051 *tmp1 = ',';
1052 if (tmp2)
1053 *tmp2 = ',';
1054 return NULL;
1055 }
1056 if (!strcmp(acceptor_values, proposer_values)) {
1057 if (tmp2)
1058 *tmp2 = ',';
1059 goto out;
1060 }
1061 if (tmp2)
1062 *tmp2++ = ',';
1063
1064 acceptor_values = tmp2;
1065 if (!acceptor_values)
1066 break;
1067 } while (acceptor_values);
1068 if (tmp1)
1069 *tmp1++ = ',';
1070 proposer_values = tmp1;
1071 } while (proposer_values);
1072
1073out:
1074 return proposer_values;
1075}
1076
1077static int iscsi_check_acceptor_state(struct iscsi_param *param, char *value)
1078{
1079 u8 acceptor_boolean_value = 0, proposer_boolean_value = 0;
1080 char *negoitated_value = NULL;
1081
1082 if (IS_PSTATE_ACCEPTOR(param)) {
1083 pr_err("Received key \"%s\" twice, protocol error.\n",
1084 param->name);
1085 return -1;
1086 }
1087
1088 if (IS_PSTATE_REJECT(param))
1089 return 0;
1090
1091 if (IS_TYPE_BOOL_AND(param)) {
1092 if (!strcmp(value, YES))
1093 proposer_boolean_value = 1;
1094 if (!strcmp(param->value, YES))
1095 acceptor_boolean_value = 1;
1096 if (acceptor_boolean_value && proposer_boolean_value)
1097 do {} while (0);
1098 else {
1099 if (iscsi_update_param_value(param, NO) < 0)
1100 return -1;
1101 if (!proposer_boolean_value)
1102 SET_PSTATE_REPLY_OPTIONAL(param);
1103 }
1104 } else if (IS_TYPE_BOOL_OR(param)) {
1105 if (!strcmp(value, YES))
1106 proposer_boolean_value = 1;
1107 if (!strcmp(param->value, YES))
1108 acceptor_boolean_value = 1;
1109 if (acceptor_boolean_value || proposer_boolean_value) {
1110 if (iscsi_update_param_value(param, YES) < 0)
1111 return -1;
1112 if (proposer_boolean_value)
1113 SET_PSTATE_REPLY_OPTIONAL(param);
1114 }
1115 } else if (IS_TYPE_NUMBER(param)) {
1116 char *tmpptr, buf[10];
1117 u32 acceptor_value = simple_strtoul(param->value, &tmpptr, 0);
1118 u32 proposer_value = simple_strtoul(value, &tmpptr, 0);
1119
1120 memset(buf, 0, 10);
1121
1122 if (!strcmp(param->name, MAXCONNECTIONS) ||
1123 !strcmp(param->name, MAXBURSTLENGTH) ||
1124 !strcmp(param->name, FIRSTBURSTLENGTH) ||
1125 !strcmp(param->name, MAXOUTSTANDINGR2T) ||
1126 !strcmp(param->name, DEFAULTTIME2RETAIN) ||
1127 !strcmp(param->name, ERRORRECOVERYLEVEL)) {
1128 if (proposer_value > acceptor_value) {
1129 sprintf(buf, "%u", acceptor_value);
1130 if (iscsi_update_param_value(param,
1131 &buf[0]) < 0)
1132 return -1;
1133 } else {
1134 if (iscsi_update_param_value(param, value) < 0)
1135 return -1;
1136 }
1137 } else if (!strcmp(param->name, DEFAULTTIME2WAIT)) {
1138 if (acceptor_value > proposer_value) {
1139 sprintf(buf, "%u", acceptor_value);
1140 if (iscsi_update_param_value(param,
1141 &buf[0]) < 0)
1142 return -1;
1143 } else {
1144 if (iscsi_update_param_value(param, value) < 0)
1145 return -1;
1146 }
1147 } else {
1148 if (iscsi_update_param_value(param, value) < 0)
1149 return -1;
1150 }
1151
1152 if (!strcmp(param->name, MAXRECVDATASEGMENTLENGTH))
1153 SET_PSTATE_REPLY_OPTIONAL(param);
1154 } else if (IS_TYPE_NUMBER_RANGE(param)) {
1155 negoitated_value = iscsi_get_value_from_number_range(
1156 param, value);
1157 if (!negoitated_value)
1158 return -1;
1159 if (iscsi_update_param_value(param, negoitated_value) < 0)
1160 return -1;
1161 } else if (IS_TYPE_VALUE_LIST(param)) {
1162 negoitated_value = iscsi_check_valuelist_for_support(
1163 param, value);
1164 if (!negoitated_value) {
1165 pr_err("Proposer's value list \"%s\" contains"
1166 " no valid values from Acceptor's value list"
1167 " \"%s\".\n", value, param->value);
1168 return -1;
1169 }
1170 if (iscsi_update_param_value(param, negoitated_value) < 0)
1171 return -1;
1172 } else if (IS_PHASE_DECLARATIVE(param)) {
1173 if (iscsi_update_param_value(param, value) < 0)
1174 return -1;
1175 SET_PSTATE_REPLY_OPTIONAL(param);
1176 }
1177
1178 return 0;
1179}
1180
1181static int iscsi_check_proposer_state(struct iscsi_param *param, char *value)
1182{
1183 if (IS_PSTATE_RESPONSE_GOT(param)) {
1184 pr_err("Received key \"%s\" twice, protocol error.\n",
1185 param->name);
1186 return -1;
1187 }
1188
1189 if (IS_TYPE_NUMBER_RANGE(param)) {
1190 u32 left_val = 0, right_val = 0, recieved_value = 0;
1191 char *left_val_ptr = NULL, *right_val_ptr = NULL;
1192 char *tilde_ptr = NULL, *tmp_ptr = NULL;
1193
1194 if (!strcmp(value, IRRELEVANT) || !strcmp(value, REJECT)) {
1195 if (iscsi_update_param_value(param, value) < 0)
1196 return -1;
1197 return 0;
1198 }
1199
1200 tilde_ptr = strchr(value, '~');
1201 if (tilde_ptr) {
1202 pr_err("Illegal \"~\" in response for \"%s\".\n",
1203 param->name);
1204 return -1;
1205 }
1206 tilde_ptr = strchr(param->value, '~');
1207 if (!tilde_ptr) {
1208 pr_err("Unable to locate numerical range"
1209 " indicator \"~\" for \"%s\".\n", param->name);
1210 return -1;
1211 }
1212 *tilde_ptr = '\0';
1213
1214 left_val_ptr = param->value;
1215 right_val_ptr = param->value + strlen(left_val_ptr) + 1;
1216 left_val = simple_strtoul(left_val_ptr, &tmp_ptr, 0);
1217 right_val = simple_strtoul(right_val_ptr, &tmp_ptr, 0);
1218 recieved_value = simple_strtoul(value, &tmp_ptr, 0);
1219
1220 *tilde_ptr = '~';
1221
1222 if ((recieved_value < left_val) ||
1223 (recieved_value > right_val)) {
1224 pr_err("Illegal response \"%s=%u\", value must"
1225 " be between %u and %u.\n", param->name,
1226 recieved_value, left_val, right_val);
1227 return -1;
1228 }
1229 } else if (IS_TYPE_VALUE_LIST(param)) {
1230 char *comma_ptr = NULL, *tmp_ptr = NULL;
1231
1232 comma_ptr = strchr(value, ',');
1233 if (comma_ptr) {
1234 pr_err("Illegal \",\" in response for \"%s\".\n",
1235 param->name);
1236 return -1;
1237 }
1238
1239 tmp_ptr = iscsi_check_valuelist_for_support(param, value);
1240 if (!tmp_ptr)
1241 return -1;
1242 }
1243
1244 if (iscsi_update_param_value(param, value) < 0)
1245 return -1;
1246
1247 return 0;
1248}
1249
1250static int iscsi_check_value(struct iscsi_param *param, char *value)
1251{
1252 char *comma_ptr = NULL;
1253
1254 if (!strcmp(value, REJECT)) {
1255 if (!strcmp(param->name, IFMARKINT) ||
1256 !strcmp(param->name, OFMARKINT)) {
1257
1258
1259
1260
1261 SET_PSTATE_REJECT(param);
1262 return 0;
1263 }
1264 pr_err("Received %s=%s\n", param->name, value);
1265 return -1;
1266 }
1267 if (!strcmp(value, IRRELEVANT)) {
1268 pr_debug("Received %s=%s\n", param->name, value);
1269 SET_PSTATE_IRRELEVANT(param);
1270 return 0;
1271 }
1272 if (!strcmp(value, NOTUNDERSTOOD)) {
1273 if (!IS_PSTATE_PROPOSER(param)) {
1274 pr_err("Received illegal offer %s=%s\n",
1275 param->name, value);
1276 return -1;
1277 }
1278
1279
1280 pr_err("Standard iSCSI key \"%s\" cannot be answered"
1281 " with \"%s\", protocol error.\n", param->name, value);
1282 return -1;
1283 }
1284
1285 do {
1286 comma_ptr = NULL;
1287 comma_ptr = strchr(value, ',');
1288
1289 if (comma_ptr && !IS_TYPE_VALUE_LIST(param)) {
1290 pr_err("Detected value seperator \",\", but"
1291 " key \"%s\" does not allow a value list,"
1292 " protocol error.\n", param->name);
1293 return -1;
1294 }
1295 if (comma_ptr)
1296 *comma_ptr = '\0';
1297
1298 if (strlen(value) > VALUE_MAXLEN) {
1299 pr_err("Value for key \"%s\" exceeds %d,"
1300 " protocol error.\n", param->name,
1301 VALUE_MAXLEN);
1302 return -1;
1303 }
1304
1305 if (IS_TYPE_BOOL_AND(param) || IS_TYPE_BOOL_OR(param)) {
1306 if (iscsi_check_boolean_value(param, value) < 0)
1307 return -1;
1308 } else if (IS_TYPE_NUMBER(param)) {
1309 if (iscsi_check_numerical_value(param, value) < 0)
1310 return -1;
1311 } else if (IS_TYPE_NUMBER_RANGE(param)) {
1312 if (iscsi_check_numerical_range_value(param, value) < 0)
1313 return -1;
1314 } else if (IS_TYPE_STRING(param) || IS_TYPE_VALUE_LIST(param)) {
1315 if (iscsi_check_string_or_list_value(param, value) < 0)
1316 return -1;
1317 } else {
1318 pr_err("Huh? 0x%02x\n", param->type);
1319 return -1;
1320 }
1321
1322 if (comma_ptr)
1323 *comma_ptr++ = ',';
1324
1325 value = comma_ptr;
1326 } while (value);
1327
1328 return 0;
1329}
1330
1331static struct iscsi_param *__iscsi_check_key(
1332 char *key,
1333 int sender,
1334 struct iscsi_param_list *param_list)
1335{
1336 struct iscsi_param *param;
1337
1338 if (strlen(key) > KEY_MAXLEN) {
1339 pr_err("Length of key name \"%s\" exceeds %d.\n",
1340 key, KEY_MAXLEN);
1341 return NULL;
1342 }
1343
1344 param = iscsi_find_param_from_key(key, param_list);
1345 if (!param)
1346 return NULL;
1347
1348 if ((sender & SENDER_INITIATOR) && !IS_SENDER_INITIATOR(param)) {
1349 pr_err("Key \"%s\" may not be sent to %s,"
1350 " protocol error.\n", param->name,
1351 (sender & SENDER_RECEIVER) ? "target" : "initiator");
1352 return NULL;
1353 }
1354
1355 if ((sender & SENDER_TARGET) && !IS_SENDER_TARGET(param)) {
1356 pr_err("Key \"%s\" may not be sent to %s,"
1357 " protocol error.\n", param->name,
1358 (sender & SENDER_RECEIVER) ? "initiator" : "target");
1359 return NULL;
1360 }
1361
1362 return param;
1363}
1364
1365static struct iscsi_param *iscsi_check_key(
1366 char *key,
1367 int phase,
1368 int sender,
1369 struct iscsi_param_list *param_list)
1370{
1371 struct iscsi_param *param;
1372
1373
1374
1375 if (strlen(key) > KEY_MAXLEN) {
1376 pr_err("Length of key name \"%s\" exceeds %d.\n",
1377 key, KEY_MAXLEN);
1378 return NULL;
1379 }
1380
1381 param = iscsi_find_param_from_key(key, param_list);
1382 if (!param)
1383 return NULL;
1384
1385 if ((sender & SENDER_INITIATOR) && !IS_SENDER_INITIATOR(param)) {
1386 pr_err("Key \"%s\" may not be sent to %s,"
1387 " protocol error.\n", param->name,
1388 (sender & SENDER_RECEIVER) ? "target" : "initiator");
1389 return NULL;
1390 }
1391 if ((sender & SENDER_TARGET) && !IS_SENDER_TARGET(param)) {
1392 pr_err("Key \"%s\" may not be sent to %s,"
1393 " protocol error.\n", param->name,
1394 (sender & SENDER_RECEIVER) ? "initiator" : "target");
1395 return NULL;
1396 }
1397
1398 if (IS_PSTATE_ACCEPTOR(param)) {
1399 pr_err("Key \"%s\" received twice, protocol error.\n",
1400 key);
1401 return NULL;
1402 }
1403
1404 if (!phase)
1405 return param;
1406
1407 if (!(param->phase & phase)) {
1408 pr_err("Key \"%s\" may not be negotiated during ",
1409 param->name);
1410 switch (phase) {
1411 case PHASE_SECURITY:
1412 pr_debug("Security phase.\n");
1413 break;
1414 case PHASE_OPERATIONAL:
1415 pr_debug("Operational phase.\n");
1416 default:
1417 pr_debug("Unknown phase.\n");
1418 }
1419 return NULL;
1420 }
1421
1422 return param;
1423}
1424
1425static int iscsi_enforce_integrity_rules(
1426 u8 phase,
1427 struct iscsi_param_list *param_list)
1428{
1429 char *tmpptr;
1430 u8 DataSequenceInOrder = 0;
1431 u8 ErrorRecoveryLevel = 0, SessionType = 0;
1432 u8 IFMarker = 0, OFMarker = 0;
1433 u8 IFMarkInt_Reject = 1, OFMarkInt_Reject = 1;
1434 u32 FirstBurstLength = 0, MaxBurstLength = 0;
1435 struct iscsi_param *param = NULL;
1436
1437 list_for_each_entry(param, ¶m_list->param_list, p_list) {
1438 if (!(param->phase & phase))
1439 continue;
1440 if (!strcmp(param->name, SESSIONTYPE))
1441 if (!strcmp(param->value, NORMAL))
1442 SessionType = 1;
1443 if (!strcmp(param->name, ERRORRECOVERYLEVEL))
1444 ErrorRecoveryLevel = simple_strtoul(param->value,
1445 &tmpptr, 0);
1446 if (!strcmp(param->name, DATASEQUENCEINORDER))
1447 if (!strcmp(param->value, YES))
1448 DataSequenceInOrder = 1;
1449 if (!strcmp(param->name, MAXBURSTLENGTH))
1450 MaxBurstLength = simple_strtoul(param->value,
1451 &tmpptr, 0);
1452 if (!strcmp(param->name, IFMARKER))
1453 if (!strcmp(param->value, YES))
1454 IFMarker = 1;
1455 if (!strcmp(param->name, OFMARKER))
1456 if (!strcmp(param->value, YES))
1457 OFMarker = 1;
1458 if (!strcmp(param->name, IFMARKINT))
1459 if (!strcmp(param->value, REJECT))
1460 IFMarkInt_Reject = 1;
1461 if (!strcmp(param->name, OFMARKINT))
1462 if (!strcmp(param->value, REJECT))
1463 OFMarkInt_Reject = 1;
1464 }
1465
1466 list_for_each_entry(param, ¶m_list->param_list, p_list) {
1467 if (!(param->phase & phase))
1468 continue;
1469 if (!SessionType && (!IS_PSTATE_ACCEPTOR(param) &&
1470 (strcmp(param->name, IFMARKER) &&
1471 strcmp(param->name, OFMARKER) &&
1472 strcmp(param->name, IFMARKINT) &&
1473 strcmp(param->name, OFMARKINT))))
1474 continue;
1475 if (!strcmp(param->name, MAXOUTSTANDINGR2T) &&
1476 DataSequenceInOrder && (ErrorRecoveryLevel > 0)) {
1477 if (strcmp(param->value, "1")) {
1478 if (iscsi_update_param_value(param, "1") < 0)
1479 return -1;
1480 pr_debug("Reset \"%s\" to \"%s\".\n",
1481 param->name, param->value);
1482 }
1483 }
1484 if (!strcmp(param->name, MAXCONNECTIONS) && !SessionType) {
1485 if (strcmp(param->value, "1")) {
1486 if (iscsi_update_param_value(param, "1") < 0)
1487 return -1;
1488 pr_debug("Reset \"%s\" to \"%s\".\n",
1489 param->name, param->value);
1490 }
1491 }
1492 if (!strcmp(param->name, FIRSTBURSTLENGTH)) {
1493 FirstBurstLength = simple_strtoul(param->value,
1494 &tmpptr, 0);
1495 if (FirstBurstLength > MaxBurstLength) {
1496 char tmpbuf[10];
1497 memset(tmpbuf, 0, 10);
1498 sprintf(tmpbuf, "%u", MaxBurstLength);
1499 if (iscsi_update_param_value(param, tmpbuf))
1500 return -1;
1501 pr_debug("Reset \"%s\" to \"%s\".\n",
1502 param->name, param->value);
1503 }
1504 }
1505 if (!strcmp(param->name, IFMARKER) && IFMarkInt_Reject) {
1506 if (iscsi_update_param_value(param, NO) < 0)
1507 return -1;
1508 IFMarker = 0;
1509 pr_debug("Reset \"%s\" to \"%s\".\n",
1510 param->name, param->value);
1511 }
1512 if (!strcmp(param->name, OFMARKER) && OFMarkInt_Reject) {
1513 if (iscsi_update_param_value(param, NO) < 0)
1514 return -1;
1515 OFMarker = 0;
1516 pr_debug("Reset \"%s\" to \"%s\".\n",
1517 param->name, param->value);
1518 }
1519 if (!strcmp(param->name, IFMARKINT) && !IFMarker) {
1520 if (!strcmp(param->value, REJECT))
1521 continue;
1522 param->state &= ~PSTATE_NEGOTIATE;
1523 if (iscsi_update_param_value(param, IRRELEVANT) < 0)
1524 return -1;
1525 pr_debug("Reset \"%s\" to \"%s\".\n",
1526 param->name, param->value);
1527 }
1528 if (!strcmp(param->name, OFMARKINT) && !OFMarker) {
1529 if (!strcmp(param->value, REJECT))
1530 continue;
1531 param->state &= ~PSTATE_NEGOTIATE;
1532 if (iscsi_update_param_value(param, IRRELEVANT) < 0)
1533 return -1;
1534 pr_debug("Reset \"%s\" to \"%s\".\n",
1535 param->name, param->value);
1536 }
1537 }
1538
1539 return 0;
1540}
1541
1542int iscsi_decode_text_input(
1543 u8 phase,
1544 u8 sender,
1545 char *textbuf,
1546 u32 length,
1547 struct iscsi_param_list *param_list)
1548{
1549 char *tmpbuf, *start = NULL, *end = NULL;
1550
1551 tmpbuf = kzalloc(length + 1, GFP_KERNEL);
1552 if (!tmpbuf) {
1553 pr_err("Unable to allocate memory for tmpbuf.\n");
1554 return -1;
1555 }
1556
1557 memcpy(tmpbuf, textbuf, length);
1558 tmpbuf[length] = '\0';
1559 start = tmpbuf;
1560 end = (start + length);
1561
1562 while (start < end) {
1563 char *key, *value;
1564 struct iscsi_param *param;
1565
1566 if (iscsi_extract_key_value(start, &key, &value) < 0) {
1567 kfree(tmpbuf);
1568 return -1;
1569 }
1570
1571 pr_debug("Got key: %s=%s\n", key, value);
1572
1573 if (phase & PHASE_SECURITY) {
1574 if (iscsi_check_for_auth_key(key) > 0) {
1575 char *tmpptr = key + strlen(key);
1576 *tmpptr = '=';
1577 kfree(tmpbuf);
1578 return 1;
1579 }
1580 }
1581
1582 param = iscsi_check_key(key, phase, sender, param_list);
1583 if (!param) {
1584 if (iscsi_add_notunderstood_response(key,
1585 value, param_list) < 0) {
1586 kfree(tmpbuf);
1587 return -1;
1588 }
1589 start += strlen(key) + strlen(value) + 2;
1590 continue;
1591 }
1592 if (iscsi_check_value(param, value) < 0) {
1593 kfree(tmpbuf);
1594 return -1;
1595 }
1596
1597 start += strlen(key) + strlen(value) + 2;
1598
1599 if (IS_PSTATE_PROPOSER(param)) {
1600 if (iscsi_check_proposer_state(param, value) < 0) {
1601 kfree(tmpbuf);
1602 return -1;
1603 }
1604 SET_PSTATE_RESPONSE_GOT(param);
1605 } else {
1606 if (iscsi_check_acceptor_state(param, value) < 0) {
1607 kfree(tmpbuf);
1608 return -1;
1609 }
1610 SET_PSTATE_ACCEPTOR(param);
1611 }
1612 }
1613
1614 kfree(tmpbuf);
1615 return 0;
1616}
1617
1618int iscsi_encode_text_output(
1619 u8 phase,
1620 u8 sender,
1621 char *textbuf,
1622 u32 *length,
1623 struct iscsi_param_list *param_list)
1624{
1625 char *output_buf = NULL;
1626 struct iscsi_extra_response *er;
1627 struct iscsi_param *param;
1628
1629 output_buf = textbuf + *length;
1630
1631 if (iscsi_enforce_integrity_rules(phase, param_list) < 0)
1632 return -1;
1633
1634 list_for_each_entry(param, ¶m_list->param_list, p_list) {
1635 if (!(param->sender & sender))
1636 continue;
1637 if (IS_PSTATE_ACCEPTOR(param) &&
1638 !IS_PSTATE_RESPONSE_SENT(param) &&
1639 !IS_PSTATE_REPLY_OPTIONAL(param) &&
1640 (param->phase & phase)) {
1641 *length += sprintf(output_buf, "%s=%s",
1642 param->name, param->value);
1643 *length += 1;
1644 output_buf = textbuf + *length;
1645 SET_PSTATE_RESPONSE_SENT(param);
1646 pr_debug("Sending key: %s=%s\n",
1647 param->name, param->value);
1648 continue;
1649 }
1650 if (IS_PSTATE_NEGOTIATE(param) &&
1651 !IS_PSTATE_ACCEPTOR(param) &&
1652 !IS_PSTATE_PROPOSER(param) &&
1653 (param->phase & phase)) {
1654 *length += sprintf(output_buf, "%s=%s",
1655 param->name, param->value);
1656 *length += 1;
1657 output_buf = textbuf + *length;
1658 SET_PSTATE_PROPOSER(param);
1659 iscsi_check_proposer_for_optional_reply(param);
1660 pr_debug("Sending key: %s=%s\n",
1661 param->name, param->value);
1662 }
1663 }
1664
1665 list_for_each_entry(er, ¶m_list->extra_response_list, er_list) {
1666 *length += sprintf(output_buf, "%s=%s", er->key, er->value);
1667 *length += 1;
1668 output_buf = textbuf + *length;
1669 pr_debug("Sending key: %s=%s\n", er->key, er->value);
1670 }
1671 iscsi_release_extra_responses(param_list);
1672
1673 return 0;
1674}
1675
1676int iscsi_check_negotiated_keys(struct iscsi_param_list *param_list)
1677{
1678 int ret = 0;
1679 struct iscsi_param *param;
1680
1681 list_for_each_entry(param, ¶m_list->param_list, p_list) {
1682 if (IS_PSTATE_NEGOTIATE(param) &&
1683 IS_PSTATE_PROPOSER(param) &&
1684 !IS_PSTATE_RESPONSE_GOT(param) &&
1685 !IS_PSTATE_REPLY_OPTIONAL(param) &&
1686 !IS_PHASE_DECLARATIVE(param)) {
1687 pr_err("No response for proposed key \"%s\".\n",
1688 param->name);
1689 ret = -1;
1690 }
1691 }
1692
1693 return ret;
1694}
1695
1696int iscsi_change_param_value(
1697 char *keyvalue,
1698 struct iscsi_param_list *param_list,
1699 int check_key)
1700{
1701 char *key = NULL, *value = NULL;
1702 struct iscsi_param *param;
1703 int sender = 0;
1704
1705 if (iscsi_extract_key_value(keyvalue, &key, &value) < 0)
1706 return -1;
1707
1708 if (!check_key) {
1709 param = __iscsi_check_key(keyvalue, sender, param_list);
1710 if (!param)
1711 return -1;
1712 } else {
1713 param = iscsi_check_key(keyvalue, 0, sender, param_list);
1714 if (!param)
1715 return -1;
1716
1717 param->set_param = 1;
1718 if (iscsi_check_value(param, value) < 0) {
1719 param->set_param = 0;
1720 return -1;
1721 }
1722 param->set_param = 0;
1723 }
1724
1725 if (iscsi_update_param_value(param, value) < 0)
1726 return -1;
1727
1728 return 0;
1729}
1730
1731void iscsi_set_connection_parameters(
1732 struct iscsi_conn_ops *ops,
1733 struct iscsi_param_list *param_list)
1734{
1735 char *tmpptr;
1736 struct iscsi_param *param;
1737
1738 pr_debug("---------------------------------------------------"
1739 "---------------\n");
1740 list_for_each_entry(param, ¶m_list->param_list, p_list) {
1741 if (!IS_PSTATE_ACCEPTOR(param) && !IS_PSTATE_PROPOSER(param))
1742 continue;
1743 if (!strcmp(param->name, AUTHMETHOD)) {
1744 pr_debug("AuthMethod: %s\n",
1745 param->value);
1746 } else if (!strcmp(param->name, HEADERDIGEST)) {
1747 ops->HeaderDigest = !strcmp(param->value, CRC32C);
1748 pr_debug("HeaderDigest: %s\n",
1749 param->value);
1750 } else if (!strcmp(param->name, DATADIGEST)) {
1751 ops->DataDigest = !strcmp(param->value, CRC32C);
1752 pr_debug("DataDigest: %s\n",
1753 param->value);
1754 } else if (!strcmp(param->name, MAXRECVDATASEGMENTLENGTH)) {
1755 ops->MaxRecvDataSegmentLength =
1756 simple_strtoul(param->value, &tmpptr, 0);
1757 pr_debug("MaxRecvDataSegmentLength: %s\n",
1758 param->value);
1759 } else if (!strcmp(param->name, OFMARKER)) {
1760 ops->OFMarker = !strcmp(param->value, YES);
1761 pr_debug("OFMarker: %s\n",
1762 param->value);
1763 } else if (!strcmp(param->name, IFMARKER)) {
1764 ops->IFMarker = !strcmp(param->value, YES);
1765 pr_debug("IFMarker: %s\n",
1766 param->value);
1767 } else if (!strcmp(param->name, OFMARKINT)) {
1768 ops->OFMarkInt =
1769 simple_strtoul(param->value, &tmpptr, 0);
1770 pr_debug("OFMarkInt: %s\n",
1771 param->value);
1772 } else if (!strcmp(param->name, IFMARKINT)) {
1773 ops->IFMarkInt =
1774 simple_strtoul(param->value, &tmpptr, 0);
1775 pr_debug("IFMarkInt: %s\n",
1776 param->value);
1777 }
1778 }
1779 pr_debug("----------------------------------------------------"
1780 "--------------\n");
1781}
1782
1783void iscsi_set_session_parameters(
1784 struct iscsi_sess_ops *ops,
1785 struct iscsi_param_list *param_list,
1786 int leading)
1787{
1788 char *tmpptr;
1789 struct iscsi_param *param;
1790
1791 pr_debug("----------------------------------------------------"
1792 "--------------\n");
1793 list_for_each_entry(param, ¶m_list->param_list, p_list) {
1794 if (!IS_PSTATE_ACCEPTOR(param) && !IS_PSTATE_PROPOSER(param))
1795 continue;
1796 if (!strcmp(param->name, INITIATORNAME)) {
1797 if (!param->value)
1798 continue;
1799 if (leading)
1800 snprintf(ops->InitiatorName,
1801 sizeof(ops->InitiatorName),
1802 "%s", param->value);
1803 pr_debug("InitiatorName: %s\n",
1804 param->value);
1805 } else if (!strcmp(param->name, INITIATORALIAS)) {
1806 if (!param->value)
1807 continue;
1808 snprintf(ops->InitiatorAlias,
1809 sizeof(ops->InitiatorAlias),
1810 "%s", param->value);
1811 pr_debug("InitiatorAlias: %s\n",
1812 param->value);
1813 } else if (!strcmp(param->name, TARGETNAME)) {
1814 if (!param->value)
1815 continue;
1816 if (leading)
1817 snprintf(ops->TargetName,
1818 sizeof(ops->TargetName),
1819 "%s", param->value);
1820 pr_debug("TargetName: %s\n",
1821 param->value);
1822 } else if (!strcmp(param->name, TARGETALIAS)) {
1823 if (!param->value)
1824 continue;
1825 snprintf(ops->TargetAlias, sizeof(ops->TargetAlias),
1826 "%s", param->value);
1827 pr_debug("TargetAlias: %s\n",
1828 param->value);
1829 } else if (!strcmp(param->name, TARGETPORTALGROUPTAG)) {
1830 ops->TargetPortalGroupTag =
1831 simple_strtoul(param->value, &tmpptr, 0);
1832 pr_debug("TargetPortalGroupTag: %s\n",
1833 param->value);
1834 } else if (!strcmp(param->name, MAXCONNECTIONS)) {
1835 ops->MaxConnections =
1836 simple_strtoul(param->value, &tmpptr, 0);
1837 pr_debug("MaxConnections: %s\n",
1838 param->value);
1839 } else if (!strcmp(param->name, INITIALR2T)) {
1840 ops->InitialR2T = !strcmp(param->value, YES);
1841 pr_debug("InitialR2T: %s\n",
1842 param->value);
1843 } else if (!strcmp(param->name, IMMEDIATEDATA)) {
1844 ops->ImmediateData = !strcmp(param->value, YES);
1845 pr_debug("ImmediateData: %s\n",
1846 param->value);
1847 } else if (!strcmp(param->name, MAXBURSTLENGTH)) {
1848 ops->MaxBurstLength =
1849 simple_strtoul(param->value, &tmpptr, 0);
1850 pr_debug("MaxBurstLength: %s\n",
1851 param->value);
1852 } else if (!strcmp(param->name, FIRSTBURSTLENGTH)) {
1853 ops->FirstBurstLength =
1854 simple_strtoul(param->value, &tmpptr, 0);
1855 pr_debug("FirstBurstLength: %s\n",
1856 param->value);
1857 } else if (!strcmp(param->name, DEFAULTTIME2WAIT)) {
1858 ops->DefaultTime2Wait =
1859 simple_strtoul(param->value, &tmpptr, 0);
1860 pr_debug("DefaultTime2Wait: %s\n",
1861 param->value);
1862 } else if (!strcmp(param->name, DEFAULTTIME2RETAIN)) {
1863 ops->DefaultTime2Retain =
1864 simple_strtoul(param->value, &tmpptr, 0);
1865 pr_debug("DefaultTime2Retain: %s\n",
1866 param->value);
1867 } else if (!strcmp(param->name, MAXOUTSTANDINGR2T)) {
1868 ops->MaxOutstandingR2T =
1869 simple_strtoul(param->value, &tmpptr, 0);
1870 pr_debug("MaxOutstandingR2T: %s\n",
1871 param->value);
1872 } else if (!strcmp(param->name, DATAPDUINORDER)) {
1873 ops->DataPDUInOrder = !strcmp(param->value, YES);
1874 pr_debug("DataPDUInOrder: %s\n",
1875 param->value);
1876 } else if (!strcmp(param->name, DATASEQUENCEINORDER)) {
1877 ops->DataSequenceInOrder = !strcmp(param->value, YES);
1878 pr_debug("DataSequenceInOrder: %s\n",
1879 param->value);
1880 } else if (!strcmp(param->name, ERRORRECOVERYLEVEL)) {
1881 ops->ErrorRecoveryLevel =
1882 simple_strtoul(param->value, &tmpptr, 0);
1883 pr_debug("ErrorRecoveryLevel: %s\n",
1884 param->value);
1885 } else if (!strcmp(param->name, SESSIONTYPE)) {
1886 ops->SessionType = !strcmp(param->value, DISCOVERY);
1887 pr_debug("SessionType: %s\n",
1888 param->value);
1889 }
1890 }
1891 pr_debug("----------------------------------------------------"
1892 "--------------\n");
1893
1894}
1895
