1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19#include <linux/slab.h>
20#include <linux/uio.h>
21#include <target/iscsi/iscsi_target_core.h>
22#include "iscsi_target_util.h"
23#include "iscsi_target_parameters.h"
24
25int 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
47int 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
78void 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
88void 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
118void 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
126static 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;
191out:
192 if (param) {
193 kfree(param->value);
194 kfree(param->name);
195 kfree(param);
196 }
197
198 return NULL;
199}
200
201
202int 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
218
219
220
221
222
223
224
225
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
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;
436out:
437 iscsi_release_param_list(pl);
438 return -1;
439}
440
441int 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
522int 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
569int 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
630err_out:
631 iscsi_release_param_list(param_list);
632 return -ENOMEM;
633}
634
635static 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
646void 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
664struct 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}
683EXPORT_SYMBOL(iscsi_find_param_from_key);
684
685int iscsi_extract_key_value(char *textbuf, char **key, char **value)
686{
687 *value = strchr(textbuf, '=');
688 if (!*value) {
689 pr_err("Unable to locate \"=\" separator for key,"
690 " ignoring request.\n");
691 return -1;
692 }
693
694 *key = textbuf;
695 **value = '\0';
696 *value = *value + 1;
697
698 return 0;
699}
700
701int iscsi_update_param_value(struct iscsi_param *param, char *value)
702{
703 kfree(param->value);
704
705 param->value = kstrdup(value, GFP_KERNEL);
706 if (!param->value) {
707 pr_err("Unable to allocate memory for value.\n");
708 return -ENOMEM;
709 }
710
711 pr_debug("iSCSI Parameter updated to %s=%s\n",
712 param->name, param->value);
713 return 0;
714}
715
716static int iscsi_add_notunderstood_response(
717 char *key,
718 char *value,
719 struct iscsi_param_list *param_list)
720{
721 struct iscsi_extra_response *extra_response;
722
723 if (strlen(value) > VALUE_MAXLEN) {
724 pr_err("Value for notunderstood key \"%s\" exceeds %d,"
725 " protocol error.\n", key, VALUE_MAXLEN);
726 return -1;
727 }
728
729 extra_response = kzalloc(sizeof(struct iscsi_extra_response), GFP_KERNEL);
730 if (!extra_response) {
731 pr_err("Unable to allocate memory for"
732 " struct iscsi_extra_response.\n");
733 return -ENOMEM;
734 }
735 INIT_LIST_HEAD(&extra_response->er_list);
736
737 strlcpy(extra_response->key, key, sizeof(extra_response->key));
738 strlcpy(extra_response->value, NOTUNDERSTOOD,
739 sizeof(extra_response->value));
740
741 list_add_tail(&extra_response->er_list,
742 ¶m_list->extra_response_list);
743 return 0;
744}
745
746static int iscsi_check_for_auth_key(char *key)
747{
748
749
750
751 if (!strcmp(key, "CHAP_A") || !strcmp(key, "CHAP_I") ||
752 !strcmp(key, "CHAP_C") || !strcmp(key, "CHAP_N") ||
753 !strcmp(key, "CHAP_R"))
754 return 1;
755
756
757
758
759 if (!strcmp(key, "SRP_U") || !strcmp(key, "SRP_N") ||
760 !strcmp(key, "SRP_g") || !strcmp(key, "SRP_s") ||
761 !strcmp(key, "SRP_A") || !strcmp(key, "SRP_B") ||
762 !strcmp(key, "SRP_M") || !strcmp(key, "SRP_HM"))
763 return 1;
764
765 return 0;
766}
767
768static void iscsi_check_proposer_for_optional_reply(struct iscsi_param *param,
769 bool keys_workaround)
770{
771 if (IS_TYPE_BOOL_AND(param)) {
772 if (!strcmp(param->value, NO))
773 SET_PSTATE_REPLY_OPTIONAL(param);
774 } else if (IS_TYPE_BOOL_OR(param)) {
775 if (!strcmp(param->value, YES))
776 SET_PSTATE_REPLY_OPTIONAL(param);
777
778 if (keys_workaround) {
779
780
781
782 if (!strcmp(param->name, IMMEDIATEDATA))
783 SET_PSTATE_REPLY_OPTIONAL(param);
784 }
785 } else if (IS_TYPE_NUMBER(param)) {
786 if (!strcmp(param->name, MAXRECVDATASEGMENTLENGTH))
787 SET_PSTATE_REPLY_OPTIONAL(param);
788
789 if (keys_workaround) {
790
791
792
793 if (!strcmp(param->name, FIRSTBURSTLENGTH))
794 SET_PSTATE_REPLY_OPTIONAL(param);
795
796
797
798
799 if (!strcmp(param->name, MAXCONNECTIONS))
800 SET_PSTATE_REPLY_OPTIONAL(param);
801 }
802 } else if (IS_PHASE_DECLARATIVE(param))
803 SET_PSTATE_REPLY_OPTIONAL(param);
804}
805
806static int iscsi_check_boolean_value(struct iscsi_param *param, char *value)
807{
808 if (strcmp(value, YES) && strcmp(value, NO)) {
809 pr_err("Illegal value for \"%s\", must be either"
810 " \"%s\" or \"%s\".\n", param->name, YES, NO);
811 return -1;
812 }
813
814 return 0;
815}
816
817static int iscsi_check_numerical_value(struct iscsi_param *param, char *value_ptr)
818{
819 char *tmpptr;
820 int value = 0;
821
822 value = simple_strtoul(value_ptr, &tmpptr, 0);
823
824 if (IS_TYPERANGE_0_TO_2(param)) {
825 if ((value < 0) || (value > 2)) {
826 pr_err("Illegal value for \"%s\", must be"
827 " between 0 and 2.\n", param->name);
828 return -1;
829 }
830 return 0;
831 }
832 if (IS_TYPERANGE_0_TO_3600(param)) {
833 if ((value < 0) || (value > 3600)) {
834 pr_err("Illegal value for \"%s\", must be"
835 " between 0 and 3600.\n", param->name);
836 return -1;
837 }
838 return 0;
839 }
840 if (IS_TYPERANGE_0_TO_32767(param)) {
841 if ((value < 0) || (value > 32767)) {
842 pr_err("Illegal value for \"%s\", must be"
843 " between 0 and 32767.\n", param->name);
844 return -1;
845 }
846 return 0;
847 }
848 if (IS_TYPERANGE_0_TO_65535(param)) {
849 if ((value < 0) || (value > 65535)) {
850 pr_err("Illegal value for \"%s\", must be"
851 " between 0 and 65535.\n", param->name);
852 return -1;
853 }
854 return 0;
855 }
856 if (IS_TYPERANGE_1_TO_65535(param)) {
857 if ((value < 1) || (value > 65535)) {
858 pr_err("Illegal value for \"%s\", must be"
859 " between 1 and 65535.\n", param->name);
860 return -1;
861 }
862 return 0;
863 }
864 if (IS_TYPERANGE_2_TO_3600(param)) {
865 if ((value < 2) || (value > 3600)) {
866 pr_err("Illegal value for \"%s\", must be"
867 " between 2 and 3600.\n", param->name);
868 return -1;
869 }
870 return 0;
871 }
872 if (IS_TYPERANGE_512_TO_16777215(param)) {
873 if ((value < 512) || (value > 16777215)) {
874 pr_err("Illegal value for \"%s\", must be"
875 " between 512 and 16777215.\n", param->name);
876 return -1;
877 }
878 return 0;
879 }
880
881 return 0;
882}
883
884static int iscsi_check_string_or_list_value(struct iscsi_param *param, char *value)
885{
886 if (IS_PSTATE_PROPOSER(param))
887 return 0;
888
889 if (IS_TYPERANGE_AUTH_PARAM(param)) {
890 if (strcmp(value, KRB5) && strcmp(value, SPKM1) &&
891 strcmp(value, SPKM2) && strcmp(value, SRP) &&
892 strcmp(value, CHAP) && strcmp(value, NONE)) {
893 pr_err("Illegal value for \"%s\", must be"
894 " \"%s\", \"%s\", \"%s\", \"%s\", \"%s\""
895 " or \"%s\".\n", param->name, KRB5,
896 SPKM1, SPKM2, SRP, CHAP, NONE);
897 return -1;
898 }
899 }
900 if (IS_TYPERANGE_DIGEST_PARAM(param)) {
901 if (strcmp(value, CRC32C) && strcmp(value, NONE)) {
902 pr_err("Illegal value for \"%s\", must be"
903 " \"%s\" or \"%s\".\n", param->name,
904 CRC32C, NONE);
905 return -1;
906 }
907 }
908 if (IS_TYPERANGE_SESSIONTYPE(param)) {
909 if (strcmp(value, DISCOVERY) && strcmp(value, NORMAL)) {
910 pr_err("Illegal value for \"%s\", must be"
911 " \"%s\" or \"%s\".\n", param->name,
912 DISCOVERY, NORMAL);
913 return -1;
914 }
915 }
916
917 return 0;
918}
919
920static char *iscsi_check_valuelist_for_support(
921 struct iscsi_param *param,
922 char *value)
923{
924 char *tmp1 = NULL, *tmp2 = NULL;
925 char *acceptor_values = NULL, *proposer_values = NULL;
926
927 acceptor_values = param->value;
928 proposer_values = value;
929
930 do {
931 if (!proposer_values)
932 return NULL;
933 tmp1 = strchr(proposer_values, ',');
934 if (tmp1)
935 *tmp1 = '\0';
936 acceptor_values = param->value;
937 do {
938 if (!acceptor_values) {
939 if (tmp1)
940 *tmp1 = ',';
941 return NULL;
942 }
943 tmp2 = strchr(acceptor_values, ',');
944 if (tmp2)
945 *tmp2 = '\0';
946 if (!strcmp(acceptor_values, proposer_values)) {
947 if (tmp2)
948 *tmp2 = ',';
949 goto out;
950 }
951 if (tmp2)
952 *tmp2++ = ',';
953
954 acceptor_values = tmp2;
955 } while (acceptor_values);
956 if (tmp1)
957 *tmp1++ = ',';
958 proposer_values = tmp1;
959 } while (proposer_values);
960
961out:
962 return proposer_values;
963}
964
965static int iscsi_check_acceptor_state(struct iscsi_param *param, char *value,
966 struct iscsi_conn *conn)
967{
968 u8 acceptor_boolean_value = 0, proposer_boolean_value = 0;
969 char *negotiated_value = NULL;
970
971 if (IS_PSTATE_ACCEPTOR(param)) {
972 pr_err("Received key \"%s\" twice, protocol error.\n",
973 param->name);
974 return -1;
975 }
976
977 if (IS_PSTATE_REJECT(param))
978 return 0;
979
980 if (IS_TYPE_BOOL_AND(param)) {
981 if (!strcmp(value, YES))
982 proposer_boolean_value = 1;
983 if (!strcmp(param->value, YES))
984 acceptor_boolean_value = 1;
985 if (acceptor_boolean_value && proposer_boolean_value)
986 do {} while (0);
987 else {
988 if (iscsi_update_param_value(param, NO) < 0)
989 return -1;
990 if (!proposer_boolean_value)
991 SET_PSTATE_REPLY_OPTIONAL(param);
992 }
993 } else if (IS_TYPE_BOOL_OR(param)) {
994 if (!strcmp(value, YES))
995 proposer_boolean_value = 1;
996 if (!strcmp(param->value, YES))
997 acceptor_boolean_value = 1;
998 if (acceptor_boolean_value || proposer_boolean_value) {
999 if (iscsi_update_param_value(param, YES) < 0)
1000 return -1;
1001 if (proposer_boolean_value)
1002 SET_PSTATE_REPLY_OPTIONAL(param);
1003 }
1004 } else if (IS_TYPE_NUMBER(param)) {
1005 char *tmpptr, buf[11];
1006 u32 acceptor_value = simple_strtoul(param->value, &tmpptr, 0);
1007 u32 proposer_value = simple_strtoul(value, &tmpptr, 0);
1008
1009 memset(buf, 0, sizeof(buf));
1010
1011 if (!strcmp(param->name, MAXCONNECTIONS) ||
1012 !strcmp(param->name, MAXBURSTLENGTH) ||
1013 !strcmp(param->name, FIRSTBURSTLENGTH) ||
1014 !strcmp(param->name, MAXOUTSTANDINGR2T) ||
1015 !strcmp(param->name, DEFAULTTIME2RETAIN) ||
1016 !strcmp(param->name, ERRORRECOVERYLEVEL)) {
1017 if (proposer_value > acceptor_value) {
1018 sprintf(buf, "%u", acceptor_value);
1019 if (iscsi_update_param_value(param,
1020 &buf[0]) < 0)
1021 return -1;
1022 } else {
1023 if (iscsi_update_param_value(param, value) < 0)
1024 return -1;
1025 }
1026 } else if (!strcmp(param->name, DEFAULTTIME2WAIT)) {
1027 if (acceptor_value > proposer_value) {
1028 sprintf(buf, "%u", acceptor_value);
1029 if (iscsi_update_param_value(param,
1030 &buf[0]) < 0)
1031 return -1;
1032 } else {
1033 if (iscsi_update_param_value(param, value) < 0)
1034 return -1;
1035 }
1036 } else {
1037 if (iscsi_update_param_value(param, value) < 0)
1038 return -1;
1039 }
1040
1041 if (!strcmp(param->name, MAXRECVDATASEGMENTLENGTH)) {
1042 struct iscsi_param *param_mxdsl;
1043 unsigned long long tmp;
1044 int rc;
1045
1046 rc = kstrtoull(param->value, 0, &tmp);
1047 if (rc < 0)
1048 return -1;
1049
1050 conn->conn_ops->MaxRecvDataSegmentLength = tmp;
1051 pr_debug("Saving op->MaxRecvDataSegmentLength from"
1052 " original initiator received value: %u\n",
1053 conn->conn_ops->MaxRecvDataSegmentLength);
1054
1055 param_mxdsl = iscsi_find_param_from_key(
1056 MAXXMITDATASEGMENTLENGTH,
1057 conn->param_list);
1058 if (!param_mxdsl)
1059 return -1;
1060
1061 rc = iscsi_update_param_value(param,
1062 param_mxdsl->value);
1063 if (rc < 0)
1064 return -1;
1065
1066 pr_debug("Updated %s to target MXDSL value: %s\n",
1067 param->name, param->value);
1068 }
1069 } else if (IS_TYPE_VALUE_LIST(param)) {
1070 negotiated_value = iscsi_check_valuelist_for_support(
1071 param, value);
1072 if (!negotiated_value) {
1073 pr_err("Proposer's value list \"%s\" contains"
1074 " no valid values from Acceptor's value list"
1075 " \"%s\".\n", value, param->value);
1076 return -1;
1077 }
1078 if (iscsi_update_param_value(param, negotiated_value) < 0)
1079 return -1;
1080 } else if (IS_PHASE_DECLARATIVE(param)) {
1081 if (iscsi_update_param_value(param, value) < 0)
1082 return -1;
1083 SET_PSTATE_REPLY_OPTIONAL(param);
1084 }
1085
1086 return 0;
1087}
1088
1089static int iscsi_check_proposer_state(struct iscsi_param *param, char *value)
1090{
1091 if (IS_PSTATE_RESPONSE_GOT(param)) {
1092 pr_err("Received key \"%s\" twice, protocol error.\n",
1093 param->name);
1094 return -1;
1095 }
1096
1097 if (IS_TYPE_VALUE_LIST(param)) {
1098 char *comma_ptr = NULL, *tmp_ptr = NULL;
1099
1100 comma_ptr = strchr(value, ',');
1101 if (comma_ptr) {
1102 pr_err("Illegal \",\" in response for \"%s\".\n",
1103 param->name);
1104 return -1;
1105 }
1106
1107 tmp_ptr = iscsi_check_valuelist_for_support(param, value);
1108 if (!tmp_ptr)
1109 return -1;
1110 }
1111
1112 if (iscsi_update_param_value(param, value) < 0)
1113 return -1;
1114
1115 return 0;
1116}
1117
1118static int iscsi_check_value(struct iscsi_param *param, char *value)
1119{
1120 char *comma_ptr = NULL;
1121
1122 if (!strcmp(value, REJECT)) {
1123 if (!strcmp(param->name, IFMARKINT) ||
1124 !strcmp(param->name, OFMARKINT)) {
1125
1126
1127
1128
1129 SET_PSTATE_REJECT(param);
1130 return 0;
1131 }
1132 pr_err("Received %s=%s\n", param->name, value);
1133 return -1;
1134 }
1135 if (!strcmp(value, IRRELEVANT)) {
1136 pr_debug("Received %s=%s\n", param->name, value);
1137 SET_PSTATE_IRRELEVANT(param);
1138 return 0;
1139 }
1140 if (!strcmp(value, NOTUNDERSTOOD)) {
1141 if (!IS_PSTATE_PROPOSER(param)) {
1142 pr_err("Received illegal offer %s=%s\n",
1143 param->name, value);
1144 return -1;
1145 }
1146
1147
1148 pr_err("Standard iSCSI key \"%s\" cannot be answered"
1149 " with \"%s\", protocol error.\n", param->name, value);
1150 return -1;
1151 }
1152
1153 do {
1154 comma_ptr = NULL;
1155 comma_ptr = strchr(value, ',');
1156
1157 if (comma_ptr && !IS_TYPE_VALUE_LIST(param)) {
1158 pr_err("Detected value separator \",\", but"
1159 " key \"%s\" does not allow a value list,"
1160 " protocol error.\n", param->name);
1161 return -1;
1162 }
1163 if (comma_ptr)
1164 *comma_ptr = '\0';
1165
1166 if (strlen(value) > VALUE_MAXLEN) {
1167 pr_err("Value for key \"%s\" exceeds %d,"
1168 " protocol error.\n", param->name,
1169 VALUE_MAXLEN);
1170 return -1;
1171 }
1172
1173 if (IS_TYPE_BOOL_AND(param) || IS_TYPE_BOOL_OR(param)) {
1174 if (iscsi_check_boolean_value(param, value) < 0)
1175 return -1;
1176 } else if (IS_TYPE_NUMBER(param)) {
1177 if (iscsi_check_numerical_value(param, value) < 0)
1178 return -1;
1179 } else if (IS_TYPE_STRING(param) || IS_TYPE_VALUE_LIST(param)) {
1180 if (iscsi_check_string_or_list_value(param, value) < 0)
1181 return -1;
1182 } else {
1183 pr_err("Huh? 0x%02x\n", param->type);
1184 return -1;
1185 }
1186
1187 if (comma_ptr)
1188 *comma_ptr++ = ',';
1189
1190 value = comma_ptr;
1191 } while (value);
1192
1193 return 0;
1194}
1195
1196static struct iscsi_param *__iscsi_check_key(
1197 char *key,
1198 int sender,
1199 struct iscsi_param_list *param_list)
1200{
1201 struct iscsi_param *param;
1202
1203 if (strlen(key) > KEY_MAXLEN) {
1204 pr_err("Length of key name \"%s\" exceeds %d.\n",
1205 key, KEY_MAXLEN);
1206 return NULL;
1207 }
1208
1209 param = iscsi_find_param_from_key(key, param_list);
1210 if (!param)
1211 return NULL;
1212
1213 if ((sender & SENDER_INITIATOR) && !IS_SENDER_INITIATOR(param)) {
1214 pr_err("Key \"%s\" may not be sent to %s,"
1215 " protocol error.\n", param->name,
1216 (sender & SENDER_RECEIVER) ? "target" : "initiator");
1217 return NULL;
1218 }
1219
1220 if ((sender & SENDER_TARGET) && !IS_SENDER_TARGET(param)) {
1221 pr_err("Key \"%s\" may not be sent to %s,"
1222 " protocol error.\n", param->name,
1223 (sender & SENDER_RECEIVER) ? "initiator" : "target");
1224 return NULL;
1225 }
1226
1227 return param;
1228}
1229
1230static struct iscsi_param *iscsi_check_key(
1231 char *key,
1232 int phase,
1233 int sender,
1234 struct iscsi_param_list *param_list)
1235{
1236 struct iscsi_param *param;
1237
1238
1239
1240 if (strlen(key) > KEY_MAXLEN) {
1241 pr_err("Length of key name \"%s\" exceeds %d.\n",
1242 key, KEY_MAXLEN);
1243 return NULL;
1244 }
1245
1246 param = iscsi_find_param_from_key(key, param_list);
1247 if (!param)
1248 return NULL;
1249
1250 if ((sender & SENDER_INITIATOR) && !IS_SENDER_INITIATOR(param)) {
1251 pr_err("Key \"%s\" may not be sent to %s,"
1252 " protocol error.\n", param->name,
1253 (sender & SENDER_RECEIVER) ? "target" : "initiator");
1254 return NULL;
1255 }
1256 if ((sender & SENDER_TARGET) && !IS_SENDER_TARGET(param)) {
1257 pr_err("Key \"%s\" may not be sent to %s,"
1258 " protocol error.\n", param->name,
1259 (sender & SENDER_RECEIVER) ? "initiator" : "target");
1260 return NULL;
1261 }
1262
1263 if (IS_PSTATE_ACCEPTOR(param)) {
1264 pr_err("Key \"%s\" received twice, protocol error.\n",
1265 key);
1266 return NULL;
1267 }
1268
1269 if (!phase)
1270 return param;
1271
1272 if (!(param->phase & phase)) {
1273 pr_err("Key \"%s\" may not be negotiated during ",
1274 param->name);
1275 switch (phase) {
1276 case PHASE_SECURITY:
1277 pr_debug("Security phase.\n");
1278 break;
1279 case PHASE_OPERATIONAL:
1280 pr_debug("Operational phase.\n");
1281 break;
1282 default:
1283 pr_debug("Unknown phase.\n");
1284 }
1285 return NULL;
1286 }
1287
1288 return param;
1289}
1290
1291static int iscsi_enforce_integrity_rules(
1292 u8 phase,
1293 struct iscsi_param_list *param_list)
1294{
1295 char *tmpptr;
1296 u8 DataSequenceInOrder = 0;
1297 u8 ErrorRecoveryLevel = 0, SessionType = 0;
1298 u32 FirstBurstLength = 0, MaxBurstLength = 0;
1299 struct iscsi_param *param = NULL;
1300
1301 list_for_each_entry(param, ¶m_list->param_list, p_list) {
1302 if (!(param->phase & phase))
1303 continue;
1304 if (!strcmp(param->name, SESSIONTYPE))
1305 if (!strcmp(param->value, NORMAL))
1306 SessionType = 1;
1307 if (!strcmp(param->name, ERRORRECOVERYLEVEL))
1308 ErrorRecoveryLevel = simple_strtoul(param->value,
1309 &tmpptr, 0);
1310 if (!strcmp(param->name, DATASEQUENCEINORDER))
1311 if (!strcmp(param->value, YES))
1312 DataSequenceInOrder = 1;
1313 if (!strcmp(param->name, MAXBURSTLENGTH))
1314 MaxBurstLength = simple_strtoul(param->value,
1315 &tmpptr, 0);
1316 }
1317
1318 list_for_each_entry(param, ¶m_list->param_list, p_list) {
1319 if (!(param->phase & phase))
1320 continue;
1321 if (!SessionType && !IS_PSTATE_ACCEPTOR(param))
1322 continue;
1323 if (!strcmp(param->name, MAXOUTSTANDINGR2T) &&
1324 DataSequenceInOrder && (ErrorRecoveryLevel > 0)) {
1325 if (strcmp(param->value, "1")) {
1326 if (iscsi_update_param_value(param, "1") < 0)
1327 return -1;
1328 pr_debug("Reset \"%s\" to \"%s\".\n",
1329 param->name, param->value);
1330 }
1331 }
1332 if (!strcmp(param->name, MAXCONNECTIONS) && !SessionType) {
1333 if (strcmp(param->value, "1")) {
1334 if (iscsi_update_param_value(param, "1") < 0)
1335 return -1;
1336 pr_debug("Reset \"%s\" to \"%s\".\n",
1337 param->name, param->value);
1338 }
1339 }
1340 if (!strcmp(param->name, FIRSTBURSTLENGTH)) {
1341 FirstBurstLength = simple_strtoul(param->value,
1342 &tmpptr, 0);
1343 if (FirstBurstLength > MaxBurstLength) {
1344 char tmpbuf[11];
1345 memset(tmpbuf, 0, sizeof(tmpbuf));
1346 sprintf(tmpbuf, "%u", MaxBurstLength);
1347 if (iscsi_update_param_value(param, tmpbuf))
1348 return -1;
1349 pr_debug("Reset \"%s\" to \"%s\".\n",
1350 param->name, param->value);
1351 }
1352 }
1353 }
1354
1355 return 0;
1356}
1357
1358int iscsi_decode_text_input(
1359 u8 phase,
1360 u8 sender,
1361 char *textbuf,
1362 u32 length,
1363 struct iscsi_conn *conn)
1364{
1365 struct iscsi_param_list *param_list = conn->param_list;
1366 char *tmpbuf, *start = NULL, *end = NULL;
1367
1368 tmpbuf = kzalloc(length + 1, GFP_KERNEL);
1369 if (!tmpbuf) {
1370 pr_err("Unable to allocate %u + 1 bytes for tmpbuf.\n", length);
1371 return -ENOMEM;
1372 }
1373
1374 memcpy(tmpbuf, textbuf, length);
1375 tmpbuf[length] = '\0';
1376 start = tmpbuf;
1377 end = (start + length);
1378
1379 while (start < end) {
1380 char *key, *value;
1381 struct iscsi_param *param;
1382
1383 if (iscsi_extract_key_value(start, &key, &value) < 0)
1384 goto free_buffer;
1385
1386 pr_debug("Got key: %s=%s\n", key, value);
1387
1388 if (phase & PHASE_SECURITY) {
1389 if (iscsi_check_for_auth_key(key) > 0) {
1390 kfree(tmpbuf);
1391 return 1;
1392 }
1393 }
1394
1395 param = iscsi_check_key(key, phase, sender, param_list);
1396 if (!param) {
1397 if (iscsi_add_notunderstood_response(key, value,
1398 param_list) < 0)
1399 goto free_buffer;
1400
1401 start += strlen(key) + strlen(value) + 2;
1402 continue;
1403 }
1404 if (iscsi_check_value(param, value) < 0)
1405 goto free_buffer;
1406
1407 start += strlen(key) + strlen(value) + 2;
1408
1409 if (IS_PSTATE_PROPOSER(param)) {
1410 if (iscsi_check_proposer_state(param, value) < 0)
1411 goto free_buffer;
1412
1413 SET_PSTATE_RESPONSE_GOT(param);
1414 } else {
1415 if (iscsi_check_acceptor_state(param, value, conn) < 0)
1416 goto free_buffer;
1417
1418 SET_PSTATE_ACCEPTOR(param);
1419 }
1420 }
1421
1422 kfree(tmpbuf);
1423 return 0;
1424
1425free_buffer:
1426 kfree(tmpbuf);
1427 return -1;
1428}
1429
1430int iscsi_encode_text_output(
1431 u8 phase,
1432 u8 sender,
1433 char *textbuf,
1434 u32 *length,
1435 struct iscsi_param_list *param_list,
1436 bool keys_workaround)
1437{
1438 char *output_buf = NULL;
1439 struct iscsi_extra_response *er;
1440 struct iscsi_param *param;
1441
1442 output_buf = textbuf + *length;
1443
1444 if (iscsi_enforce_integrity_rules(phase, param_list) < 0)
1445 return -1;
1446
1447 list_for_each_entry(param, ¶m_list->param_list, p_list) {
1448 if (!(param->sender & sender))
1449 continue;
1450 if (IS_PSTATE_ACCEPTOR(param) &&
1451 !IS_PSTATE_RESPONSE_SENT(param) &&
1452 !IS_PSTATE_REPLY_OPTIONAL(param) &&
1453 (param->phase & phase)) {
1454 *length += sprintf(output_buf, "%s=%s",
1455 param->name, param->value);
1456 *length += 1;
1457 output_buf = textbuf + *length;
1458 SET_PSTATE_RESPONSE_SENT(param);
1459 pr_debug("Sending key: %s=%s\n",
1460 param->name, param->value);
1461 continue;
1462 }
1463 if (IS_PSTATE_NEGOTIATE(param) &&
1464 !IS_PSTATE_ACCEPTOR(param) &&
1465 !IS_PSTATE_PROPOSER(param) &&
1466 (param->phase & phase)) {
1467 *length += sprintf(output_buf, "%s=%s",
1468 param->name, param->value);
1469 *length += 1;
1470 output_buf = textbuf + *length;
1471 SET_PSTATE_PROPOSER(param);
1472 iscsi_check_proposer_for_optional_reply(param,
1473 keys_workaround);
1474 pr_debug("Sending key: %s=%s\n",
1475 param->name, param->value);
1476 }
1477 }
1478
1479 list_for_each_entry(er, ¶m_list->extra_response_list, er_list) {
1480 *length += sprintf(output_buf, "%s=%s", er->key, er->value);
1481 *length += 1;
1482 output_buf = textbuf + *length;
1483 pr_debug("Sending key: %s=%s\n", er->key, er->value);
1484 }
1485 iscsi_release_extra_responses(param_list);
1486
1487 return 0;
1488}
1489
1490int iscsi_check_negotiated_keys(struct iscsi_param_list *param_list)
1491{
1492 int ret = 0;
1493 struct iscsi_param *param;
1494
1495 list_for_each_entry(param, ¶m_list->param_list, p_list) {
1496 if (IS_PSTATE_NEGOTIATE(param) &&
1497 IS_PSTATE_PROPOSER(param) &&
1498 !IS_PSTATE_RESPONSE_GOT(param) &&
1499 !IS_PSTATE_REPLY_OPTIONAL(param) &&
1500 !IS_PHASE_DECLARATIVE(param)) {
1501 pr_err("No response for proposed key \"%s\".\n",
1502 param->name);
1503 ret = -1;
1504 }
1505 }
1506
1507 return ret;
1508}
1509
1510int iscsi_change_param_value(
1511 char *keyvalue,
1512 struct iscsi_param_list *param_list,
1513 int check_key)
1514{
1515 char *key = NULL, *value = NULL;
1516 struct iscsi_param *param;
1517 int sender = 0;
1518
1519 if (iscsi_extract_key_value(keyvalue, &key, &value) < 0)
1520 return -1;
1521
1522 if (!check_key) {
1523 param = __iscsi_check_key(keyvalue, sender, param_list);
1524 if (!param)
1525 return -1;
1526 } else {
1527 param = iscsi_check_key(keyvalue, 0, sender, param_list);
1528 if (!param)
1529 return -1;
1530
1531 param->set_param = 1;
1532 if (iscsi_check_value(param, value) < 0) {
1533 param->set_param = 0;
1534 return -1;
1535 }
1536 param->set_param = 0;
1537 }
1538
1539 if (iscsi_update_param_value(param, value) < 0)
1540 return -1;
1541
1542 return 0;
1543}
1544
1545void iscsi_set_connection_parameters(
1546 struct iscsi_conn_ops *ops,
1547 struct iscsi_param_list *param_list)
1548{
1549 char *tmpptr;
1550 struct iscsi_param *param;
1551
1552 pr_debug("---------------------------------------------------"
1553 "---------------\n");
1554 list_for_each_entry(param, ¶m_list->param_list, p_list) {
1555
1556
1557
1558
1559
1560 if (!strcmp(param->name, MAXXMITDATASEGMENTLENGTH)) {
1561 ops->MaxXmitDataSegmentLength =
1562 simple_strtoul(param->value, &tmpptr, 0);
1563 pr_debug("MaxXmitDataSegmentLength: %s\n",
1564 param->value);
1565 }
1566
1567 if (!IS_PSTATE_ACCEPTOR(param) && !IS_PSTATE_PROPOSER(param))
1568 continue;
1569 if (!strcmp(param->name, AUTHMETHOD)) {
1570 pr_debug("AuthMethod: %s\n",
1571 param->value);
1572 } else if (!strcmp(param->name, HEADERDIGEST)) {
1573 ops->HeaderDigest = !strcmp(param->value, CRC32C);
1574 pr_debug("HeaderDigest: %s\n",
1575 param->value);
1576 } else if (!strcmp(param->name, DATADIGEST)) {
1577 ops->DataDigest = !strcmp(param->value, CRC32C);
1578 pr_debug("DataDigest: %s\n",
1579 param->value);
1580 } else if (!strcmp(param->name, MAXRECVDATASEGMENTLENGTH)) {
1581
1582
1583
1584
1585
1586 pr_debug("MaxRecvDataSegmentLength: %u\n",
1587 ops->MaxRecvDataSegmentLength);
1588 } else if (!strcmp(param->name, INITIATORRECVDATASEGMENTLENGTH)) {
1589 ops->InitiatorRecvDataSegmentLength =
1590 simple_strtoul(param->value, &tmpptr, 0);
1591 pr_debug("InitiatorRecvDataSegmentLength: %s\n",
1592 param->value);
1593 ops->MaxRecvDataSegmentLength =
1594 ops->InitiatorRecvDataSegmentLength;
1595 pr_debug("Set MRDSL from InitiatorRecvDataSegmentLength\n");
1596 } else if (!strcmp(param->name, TARGETRECVDATASEGMENTLENGTH)) {
1597 ops->TargetRecvDataSegmentLength =
1598 simple_strtoul(param->value, &tmpptr, 0);
1599 pr_debug("TargetRecvDataSegmentLength: %s\n",
1600 param->value);
1601 ops->MaxXmitDataSegmentLength =
1602 ops->TargetRecvDataSegmentLength;
1603 pr_debug("Set MXDSL from TargetRecvDataSegmentLength\n");
1604 }
1605 }
1606 pr_debug("----------------------------------------------------"
1607 "--------------\n");
1608}
1609
1610void iscsi_set_session_parameters(
1611 struct iscsi_sess_ops *ops,
1612 struct iscsi_param_list *param_list,
1613 int leading)
1614{
1615 char *tmpptr;
1616 struct iscsi_param *param;
1617
1618 pr_debug("----------------------------------------------------"
1619 "--------------\n");
1620 list_for_each_entry(param, ¶m_list->param_list, p_list) {
1621 if (!IS_PSTATE_ACCEPTOR(param) && !IS_PSTATE_PROPOSER(param))
1622 continue;
1623 if (!strcmp(param->name, INITIATORNAME)) {
1624 if (!param->value)
1625 continue;
1626 if (leading)
1627 snprintf(ops->InitiatorName,
1628 sizeof(ops->InitiatorName),
1629 "%s", param->value);
1630 pr_debug("InitiatorName: %s\n",
1631 param->value);
1632 } else if (!strcmp(param->name, INITIATORALIAS)) {
1633 if (!param->value)
1634 continue;
1635 snprintf(ops->InitiatorAlias,
1636 sizeof(ops->InitiatorAlias),
1637 "%s", param->value);
1638 pr_debug("InitiatorAlias: %s\n",
1639 param->value);
1640 } else if (!strcmp(param->name, TARGETNAME)) {
1641 if (!param->value)
1642 continue;
1643 if (leading)
1644 snprintf(ops->TargetName,
1645 sizeof(ops->TargetName),
1646 "%s", param->value);
1647 pr_debug("TargetName: %s\n",
1648 param->value);
1649 } else if (!strcmp(param->name, TARGETALIAS)) {
1650 if (!param->value)
1651 continue;
1652 snprintf(ops->TargetAlias, sizeof(ops->TargetAlias),
1653 "%s", param->value);
1654 pr_debug("TargetAlias: %s\n",
1655 param->value);
1656 } else if (!strcmp(param->name, TARGETPORTALGROUPTAG)) {
1657 ops->TargetPortalGroupTag =
1658 simple_strtoul(param->value, &tmpptr, 0);
1659 pr_debug("TargetPortalGroupTag: %s\n",
1660 param->value);
1661 } else if (!strcmp(param->name, MAXCONNECTIONS)) {
1662 ops->MaxConnections =
1663 simple_strtoul(param->value, &tmpptr, 0);
1664 pr_debug("MaxConnections: %s\n",
1665 param->value);
1666 } else if (!strcmp(param->name, INITIALR2T)) {
1667 ops->InitialR2T = !strcmp(param->value, YES);
1668 pr_debug("InitialR2T: %s\n",
1669 param->value);
1670 } else if (!strcmp(param->name, IMMEDIATEDATA)) {
1671 ops->ImmediateData = !strcmp(param->value, YES);
1672 pr_debug("ImmediateData: %s\n",
1673 param->value);
1674 } else if (!strcmp(param->name, MAXBURSTLENGTH)) {
1675 ops->MaxBurstLength =
1676 simple_strtoul(param->value, &tmpptr, 0);
1677 pr_debug("MaxBurstLength: %s\n",
1678 param->value);
1679 } else if (!strcmp(param->name, FIRSTBURSTLENGTH)) {
1680 ops->FirstBurstLength =
1681 simple_strtoul(param->value, &tmpptr, 0);
1682 pr_debug("FirstBurstLength: %s\n",
1683 param->value);
1684 } else if (!strcmp(param->name, DEFAULTTIME2WAIT)) {
1685 ops->DefaultTime2Wait =
1686 simple_strtoul(param->value, &tmpptr, 0);
1687 pr_debug("DefaultTime2Wait: %s\n",
1688 param->value);
1689 } else if (!strcmp(param->name, DEFAULTTIME2RETAIN)) {
1690 ops->DefaultTime2Retain =
1691 simple_strtoul(param->value, &tmpptr, 0);
1692 pr_debug("DefaultTime2Retain: %s\n",
1693 param->value);
1694 } else if (!strcmp(param->name, MAXOUTSTANDINGR2T)) {
1695 ops->MaxOutstandingR2T =
1696 simple_strtoul(param->value, &tmpptr, 0);
1697 pr_debug("MaxOutstandingR2T: %s\n",
1698 param->value);
1699 } else if (!strcmp(param->name, DATAPDUINORDER)) {
1700 ops->DataPDUInOrder = !strcmp(param->value, YES);
1701 pr_debug("DataPDUInOrder: %s\n",
1702 param->value);
1703 } else if (!strcmp(param->name, DATASEQUENCEINORDER)) {
1704 ops->DataSequenceInOrder = !strcmp(param->value, YES);
1705 pr_debug("DataSequenceInOrder: %s\n",
1706 param->value);
1707 } else if (!strcmp(param->name, ERRORRECOVERYLEVEL)) {
1708 ops->ErrorRecoveryLevel =
1709 simple_strtoul(param->value, &tmpptr, 0);
1710 pr_debug("ErrorRecoveryLevel: %s\n",
1711 param->value);
1712 } else if (!strcmp(param->name, SESSIONTYPE)) {
1713 ops->SessionType = !strcmp(param->value, DISCOVERY);
1714 pr_debug("SessionType: %s\n",
1715 param->value);
1716 } else if (!strcmp(param->name, RDMAEXTENSIONS)) {
1717 ops->RDMAExtensions = !strcmp(param->value, YES);
1718 pr_debug("RDMAExtensions: %s\n",
1719 param->value);
1720 }
1721 }
1722 pr_debug("----------------------------------------------------"
1723 "--------------\n");
1724
1725}
1726
