1 /*******************************************************************************
2  * This file contains main functions related to iSCSI Parameter negotiation.
3  *
4  * \u00a9 Copyright 2007-2011 RisingTide Systems LLC.
5  *
6  * Licensed to the Linux Foundation under the General Public License (GPL) version 2.
7  *
8  * Author: Nicholas A. Bellinger <nab@linux-iscsi.org>
9  *
10  * This program is free software; you can redistribute it and/or modify
11  * it under the terms of the GNU General Public License as published by
12  * the Free Software Foundation; either version 2 of the License, or
13  * (at your option) any later version.
14  *
15  * This program is distributed in the hope that it will be useful,
16  * but WITHOUT ANY WARRANTY; without even the implied warranty of
17  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
18  * GNU General Public License for more details.
19  ******************************************************************************/
20 
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 
27 int 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 	 * Initial Marker-less Interval.
41 	 * Add the values regardless of IFMarker/OFMarker, considering
42 	 * it may not be negoitated yet.
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 
56 int 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 	 * Initial Marker-less Interval.
75 	 * Add the values regardless of IFMarker/OFMarker, considering
76 	 * it may not be negoitated yet.
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 
90 void 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 
106 void 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 
136 void iscsi_print_params(struct iscsi_param_list *param_list)
137 {
138 	struct iscsi_param *param;
139 
140 	list_for_each_entry(param, &param_list->param_list, p_list)
141 		pr_debug("%s: %s\n", param->name, param->value);
142 }
143 
144 static 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(&param->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(&param->p_list, &param_list->param_list);
215 
216 	return param;
217 out:
218 	if (param) {
219 		kfree(param->value);
220 		kfree(param->name);
221 		kfree(param);
222 	}
223 
224 	return NULL;
225 }
226 
227 /* #warning Add extension keys */
228 int 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 	 * The format for setting the initial parameter definitions are:
244 	 *
245 	 * Parameter name:
246 	 * Initial value:
247 	 * Allowable phase:
248 	 * Scope:
249 	 * Allowable senders:
250 	 * Typerange:
251 	 * Use:
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, MAXXMITDATASEGMENTLENGTH,
338 			INITIAL_MAXXMITDATASEGMENTLENGTH,
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, MAXRECVDATASEGMENTLENGTH,
345 			INITIAL_MAXRECVDATASEGMENTLENGTH,
346 			PHASE_OPERATIONAL, SCOPE_CONNECTION_ONLY, SENDER_BOTH,
347 			TYPERANGE_512_TO_16777215, USE_ALL);
348 	if (!param)
349 		goto out;
350 
351 	param = iscsi_set_default_param(pl, MAXBURSTLENGTH,
352 			INITIAL_MAXBURSTLENGTH, PHASE_OPERATIONAL,
353 			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, FIRSTBURSTLENGTH,
359 			INITIAL_FIRSTBURSTLENGTH,
360 			PHASE_OPERATIONAL, SCOPE_SESSION_WIDE, SENDER_BOTH,
361 			TYPERANGE_512_TO_16777215, USE_LEADING_ONLY);
362 	if (!param)
363 		goto out;
364 
365 	param = iscsi_set_default_param(pl, DEFAULTTIME2WAIT,
366 			INITIAL_DEFAULTTIME2WAIT,
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, DEFAULTTIME2RETAIN,
373 			INITIAL_DEFAULTTIME2RETAIN,
374 			PHASE_OPERATIONAL, SCOPE_SESSION_WIDE, SENDER_BOTH,
375 			TYPERANGE_0_TO_3600, USE_LEADING_ONLY);
376 	if (!param)
377 		goto out;
378 
379 	param = iscsi_set_default_param(pl, MAXOUTSTANDINGR2T,
380 			INITIAL_MAXOUTSTANDINGR2T,
381 			PHASE_OPERATIONAL, SCOPE_SESSION_WIDE, SENDER_BOTH,
382 			TYPERANGE_1_TO_65535, USE_LEADING_ONLY);
383 	if (!param)
384 		goto out;
385 
386 	param = iscsi_set_default_param(pl, DATAPDUINORDER,
387 			INITIAL_DATAPDUINORDER, PHASE_OPERATIONAL,
388 			SCOPE_SESSION_WIDE, SENDER_BOTH, TYPERANGE_BOOL_OR,
389 			USE_LEADING_ONLY);
390 	if (!param)
391 		goto out;
392 
393 	param = iscsi_set_default_param(pl, DATASEQUENCEINORDER,
394 			INITIAL_DATASEQUENCEINORDER,
395 			PHASE_OPERATIONAL, SCOPE_SESSION_WIDE, SENDER_BOTH,
396 			TYPERANGE_BOOL_OR, USE_LEADING_ONLY);
397 	if (!param)
398 		goto out;
399 
400 	param = iscsi_set_default_param(pl, ERRORRECOVERYLEVEL,
401 			INITIAL_ERRORRECOVERYLEVEL,
402 			PHASE_OPERATIONAL, SCOPE_SESSION_WIDE, SENDER_BOTH,
403 			TYPERANGE_0_TO_2, USE_LEADING_ONLY);
404 	if (!param)
405 		goto out;
406 
407 	param = iscsi_set_default_param(pl, SESSIONTYPE, INITIAL_SESSIONTYPE,
408 			PHASE_DECLARATIVE, SCOPE_SESSION_WIDE, SENDER_INITIATOR,
409 			TYPERANGE_SESSIONTYPE, USE_LEADING_ONLY);
410 	if (!param)
411 		goto out;
412 
413 	param = iscsi_set_default_param(pl, IFMARKER, INITIAL_IFMARKER,
414 			PHASE_OPERATIONAL, SCOPE_CONNECTION_ONLY, SENDER_BOTH,
415 			TYPERANGE_BOOL_AND, USE_INITIAL_ONLY);
416 	if (!param)
417 		goto out;
418 
419 	param = iscsi_set_default_param(pl, OFMARKER, INITIAL_OFMARKER,
420 			PHASE_OPERATIONAL, SCOPE_CONNECTION_ONLY, SENDER_BOTH,
421 			TYPERANGE_BOOL_AND, USE_INITIAL_ONLY);
422 	if (!param)
423 		goto out;
424 
425 	param = iscsi_set_default_param(pl, IFMARKINT, INITIAL_IFMARKINT,
426 			PHASE_OPERATIONAL, SCOPE_CONNECTION_ONLY, SENDER_BOTH,
427 			TYPERANGE_MARKINT, USE_INITIAL_ONLY);
428 	if (!param)
429 		goto out;
430 
431 	param = iscsi_set_default_param(pl, OFMARKINT, INITIAL_OFMARKINT,
432 			PHASE_OPERATIONAL, SCOPE_CONNECTION_ONLY, SENDER_BOTH,
433 			TYPERANGE_MARKINT, USE_INITIAL_ONLY);
434 	if (!param)
435 		goto out;
436 
437 	*param_list_ptr = pl;
438 	return 0;
439 out:
440 	iscsi_release_param_list(pl);
441 	return -1;
442 }
443 
444 int iscsi_set_keys_to_negotiate(
445 	int sessiontype,
446 	struct iscsi_param_list *param_list)
447 {
448 	struct iscsi_param *param;
449 
450 	list_for_each_entry(param, &param_list->param_list, p_list) {
451 		param->state = 0;
452 		if (!strcmp(param->name, AUTHMETHOD)) {
453 			SET_PSTATE_NEGOTIATE(param);
454 		} else if (!strcmp(param->name, HEADERDIGEST)) {
455 			SET_PSTATE_NEGOTIATE(param);
456 		} else if (!strcmp(param->name, DATADIGEST)) {
457 			SET_PSTATE_NEGOTIATE(param);
458 		} else if (!strcmp(param->name, MAXCONNECTIONS)) {
459 			SET_PSTATE_NEGOTIATE(param);
460 		} else if (!strcmp(param->name, TARGETNAME)) {
461 			continue;
462 		} else if (!strcmp(param->name, INITIATORNAME)) {
463 			continue;
464 		} else if (!strcmp(param->name, TARGETALIAS)) {
465 			if (param->value)
466 				SET_PSTATE_NEGOTIATE(param);
467 		} else if (!strcmp(param->name, INITIATORALIAS)) {
468 			continue;
469 		} else if (!strcmp(param->name, TARGETPORTALGROUPTAG)) {
470 			SET_PSTATE_NEGOTIATE(param);
471 		} else if (!strcmp(param->name, INITIALR2T)) {
472 			SET_PSTATE_NEGOTIATE(param);
473 		} else if (!strcmp(param->name, IMMEDIATEDATA)) {
474 			SET_PSTATE_NEGOTIATE(param);
475 		} else if (!strcmp(param->name, MAXRECVDATASEGMENTLENGTH)) {
476 			SET_PSTATE_NEGOTIATE(param);
477 		} else if (!strcmp(param->name, MAXXMITDATASEGMENTLENGTH)) {
478 			continue;
479 		} else if (!strcmp(param->name, MAXBURSTLENGTH)) {
480 			SET_PSTATE_NEGOTIATE(param);
481 		} else if (!strcmp(param->name, FIRSTBURSTLENGTH)) {
482 			SET_PSTATE_NEGOTIATE(param);
483 		} else if (!strcmp(param->name, DEFAULTTIME2WAIT)) {
484 			SET_PSTATE_NEGOTIATE(param);
485 		} else if (!strcmp(param->name, DEFAULTTIME2RETAIN)) {
486 			SET_PSTATE_NEGOTIATE(param);
487 		} else if (!strcmp(param->name, MAXOUTSTANDINGR2T)) {
488 			SET_PSTATE_NEGOTIATE(param);
489 		} else if (!strcmp(param->name, DATAPDUINORDER)) {
490 			SET_PSTATE_NEGOTIATE(param);
491 		} else if (!strcmp(param->name, DATASEQUENCEINORDER)) {
492 			SET_PSTATE_NEGOTIATE(param);
493 		} else if (!strcmp(param->name, ERRORRECOVERYLEVEL)) {
494 			SET_PSTATE_NEGOTIATE(param);
495 		} else if (!strcmp(param->name, SESSIONTYPE)) {
496 			SET_PSTATE_NEGOTIATE(param);
497 		} else if (!strcmp(param->name, IFMARKER)) {
498 			SET_PSTATE_NEGOTIATE(param);
499 		} else if (!strcmp(param->name, OFMARKER)) {
500 			SET_PSTATE_NEGOTIATE(param);
501 		} else if (!strcmp(param->name, IFMARKINT)) {
502 			SET_PSTATE_NEGOTIATE(param);
503 		} else if (!strcmp(param->name, OFMARKINT)) {
504 			SET_PSTATE_NEGOTIATE(param);
505 		}
506 	}
507 
508 	return 0;
509 }
510 
511 int iscsi_set_keys_irrelevant_for_discovery(
512 	struct iscsi_param_list *param_list)
513 {
514 	struct iscsi_param *param;
515 
516 	list_for_each_entry(param, &param_list->param_list, p_list) {
517 		if (!strcmp(param->name, MAXCONNECTIONS))
518 			param->state &= ~PSTATE_NEGOTIATE;
519 		else if (!strcmp(param->name, INITIALR2T))
520 			param->state &= ~PSTATE_NEGOTIATE;
521 		else if (!strcmp(param->name, IMMEDIATEDATA))
522 			param->state &= ~PSTATE_NEGOTIATE;
523 		else if (!strcmp(param->name, MAXBURSTLENGTH))
524 			param->state &= ~PSTATE_NEGOTIATE;
525 		else if (!strcmp(param->name, FIRSTBURSTLENGTH))
526 			param->state &= ~PSTATE_NEGOTIATE;
527 		else if (!strcmp(param->name, MAXOUTSTANDINGR2T))
528 			param->state &= ~PSTATE_NEGOTIATE;
529 		else if (!strcmp(param->name, DATAPDUINORDER))
530 			param->state &= ~PSTATE_NEGOTIATE;
531 		else if (!strcmp(param->name, DATASEQUENCEINORDER))
532 			param->state &= ~PSTATE_NEGOTIATE;
533 		else if (!strcmp(param->name, ERRORRECOVERYLEVEL))
534 			param->state &= ~PSTATE_NEGOTIATE;
535 		else if (!strcmp(param->name, DEFAULTTIME2WAIT))
536 			param->state &= ~PSTATE_NEGOTIATE;
537 		else if (!strcmp(param->name, DEFAULTTIME2RETAIN))
538 			param->state &= ~PSTATE_NEGOTIATE;
539 		else if (!strcmp(param->name, IFMARKER))
540 			param->state &= ~PSTATE_NEGOTIATE;
541 		else if (!strcmp(param->name, OFMARKER))
542 			param->state &= ~PSTATE_NEGOTIATE;
543 		else if (!strcmp(param->name, IFMARKINT))
544 			param->state &= ~PSTATE_NEGOTIATE;
545 		else if (!strcmp(param->name, OFMARKINT))
546 			param->state &= ~PSTATE_NEGOTIATE;
547 	}
548 
549 	return 0;
550 }
551 
552 int iscsi_copy_param_list(
553 	struct iscsi_param_list **dst_param_list,
554 	struct iscsi_param_list *src_param_list,
555 	int leading)
556 {
557 	struct iscsi_param *param = NULL;
558 	struct iscsi_param *new_param = NULL;
559 	struct iscsi_param_list *param_list = NULL;
560 
561 	param_list = kzalloc(sizeof(struct iscsi_param_list), GFP_KERNEL);
562 	if (!param_list) {
563 		pr_err("Unable to allocate memory for struct iscsi_param_list.\n");
564 		goto err_out;
565 	}
566 	INIT_LIST_HEAD(&param_list->param_list);
567 	INIT_LIST_HEAD(&param_list->extra_response_list);
568 
569 	list_for_each_entry(param, &src_param_list->param_list, p_list) {
570 		if (!leading && (param->scope & SCOPE_SESSION_WIDE)) {
571 			if ((strcmp(param->name, "TargetName") != 0) &&
572 			    (strcmp(param->name, "InitiatorName") != 0) &&
573 			    (strcmp(param->name, "TargetPortalGroupTag") != 0))
574 				continue;
575 		}
576 
577 		new_param = kzalloc(sizeof(struct iscsi_param), GFP_KERNEL);
578 		if (!new_param) {
579 			pr_err("Unable to allocate memory for struct iscsi_param.\n");
580 			goto err_out;
581 		}
582 
583 		new_param->name = kstrdup(param->name, GFP_KERNEL);
584 		new_param->value = kstrdup(param->value, GFP_KERNEL);
585 		if (!new_param->value || !new_param->name) {
586 			kfree(new_param->value);
587 			kfree(new_param->name);
588 			kfree(new_param);
589 			pr_err("Unable to allocate memory for parameter name/value.\n");
590 			goto err_out;
591 		}
592 
593 		new_param->set_param = param->set_param;
594 		new_param->phase = param->phase;
595 		new_param->scope = param->scope;
596 		new_param->sender = param->sender;
597 		new_param->type = param->type;
598 		new_param->use = param->use;
599 		new_param->type_range = param->type_range;
600 
601 		list_add_tail(&new_param->p_list, &param_list->param_list);
602 	}
603 
604 	if (!list_empty(&param_list->param_list)) {
605 		*dst_param_list = param_list;
606 	} else {
607 		pr_err("No parameters allocated.\n");
608 		goto err_out;
609 	}
610 
611 	return 0;
612 
613 err_out:
614 	iscsi_release_param_list(param_list);
615 	return -1;
616 }
617 
618 static void iscsi_release_extra_responses(struct iscsi_param_list *param_list)
619 {
620 	struct iscsi_extra_response *er, *er_tmp;
621 
622 	list_for_each_entry_safe(er, er_tmp, &param_list->extra_response_list,
623 			er_list) {
624 		list_del(&er->er_list);
625 		kfree(er);
626 	}
627 }
628 
629 void iscsi_release_param_list(struct iscsi_param_list *param_list)
630 {
631 	struct iscsi_param *param, *param_tmp;
632 
633 	list_for_each_entry_safe(param, param_tmp, &param_list->param_list,
634 			p_list) {
635 		list_del(&param->p_list);
636 
637 		kfree(param->name);
638 		param->name = NULL;
639 		kfree(param->value);
640 		param->value = NULL;
641 		kfree(param);
642 		param = NULL;
643 	}
644 
645 	iscsi_release_extra_responses(param_list);
646 
647 	kfree(param_list);
648 }
649 
650 struct iscsi_param *iscsi_find_param_from_key(
651 	char *key,
652 	struct iscsi_param_list *param_list)
653 {
654 	struct iscsi_param *param;
655 
656 	if (!key || !param_list) {
657 		pr_err("Key or parameter list pointer is NULL.\n");
658 		return NULL;
659 	}
660 
661 	list_for_each_entry(param, &param_list->param_list, p_list) {
662 		if (!strcmp(key, param->name))
663 			return param;
664 	}
665 
666 	pr_err("Unable to locate key \"%s\".\n", key);
667 	return NULL;
668 }
669 
670 int iscsi_extract_key_value(char *textbuf, char **key, char **value)
671 {
672 	*value = strchr(textbuf, '=');
673 	if (!*value) {
674 		pr_err("Unable to locate \"=\" separator for key,"
675 				" ignoring request.\n");
676 		return -1;
677 	}
678 
679 	*key = textbuf;
680 	**value = '\0';
681 	*value = *value + 1;
682 
683 	return 0;
684 }
685 
686 int iscsi_update_param_value(struct iscsi_param *param, char *value)
687 {
688 	kfree(param->value);
689 
690 	param->value = kzalloc(strlen(value) + 1, GFP_KERNEL);
691 	if (!param->value) {
692 		pr_err("Unable to allocate memory for value.\n");
693 		return -ENOMEM;
694 	}
695 
696 	memcpy(param->value, value, strlen(value));
697 	param->value[strlen(value)] = '\0';
698 
699 	pr_debug("iSCSI Parameter updated to %s=%s\n",
700 			param->name, param->value);
701 	return 0;
702 }
703 
704 static int iscsi_add_notunderstood_response(
705 	char *key,
706 	char *value,
707 	struct iscsi_param_list *param_list)
708 {
709 	struct iscsi_extra_response *extra_response;
710 
711 	if (strlen(value) > VALUE_MAXLEN) {
712 		pr_err("Value for notunderstood key \"%s\" exceeds %d,"
713 			" protocol error.\n", key, VALUE_MAXLEN);
714 		return -1;
715 	}
716 
717 	extra_response = kzalloc(sizeof(struct iscsi_extra_response), GFP_KERNEL);
718 	if (!extra_response) {
719 		pr_err("Unable to allocate memory for"
720 			" struct iscsi_extra_response.\n");
721 		return -1;
722 	}
723 	INIT_LIST_HEAD(&extra_response->er_list);
724 
725 	strncpy(extra_response->key, key, strlen(key) + 1);
726 	strncpy(extra_response->value, NOTUNDERSTOOD,
727 			strlen(NOTUNDERSTOOD) + 1);
728 
729 	list_add_tail(&extra_response->er_list,
730 			&param_list->extra_response_list);
731 	return 0;
732 }
733 
734 static int iscsi_check_for_auth_key(char *key)
735 {
736 	/*
737 	 * RFC 1994
738 	 */
739 	if (!strcmp(key, "CHAP_A") || !strcmp(key, "CHAP_I") ||
740 	    !strcmp(key, "CHAP_C") || !strcmp(key, "CHAP_N") ||
741 	    !strcmp(key, "CHAP_R"))
742 		return 1;
743 
744 	/*
745 	 * RFC 2945
746 	 */
747 	if (!strcmp(key, "SRP_U") || !strcmp(key, "SRP_N") ||
748 	    !strcmp(key, "SRP_g") || !strcmp(key, "SRP_s") ||
749 	    !strcmp(key, "SRP_A") || !strcmp(key, "SRP_B") ||
750 	    !strcmp(key, "SRP_M") || !strcmp(key, "SRP_HM"))
751 		return 1;
752 
753 	return 0;
754 }
755 
756 static void iscsi_check_proposer_for_optional_reply(struct iscsi_param *param)
757 {
758 	if (IS_TYPE_BOOL_AND(param)) {
759 		if (!strcmp(param->value, NO))
760 			SET_PSTATE_REPLY_OPTIONAL(param);
761 	} else if (IS_TYPE_BOOL_OR(param)) {
762 		if (!strcmp(param->value, YES))
763 			SET_PSTATE_REPLY_OPTIONAL(param);
764 		 /*
765 		  * Required for gPXE iSCSI boot client
766 		  */
767 		if (!strcmp(param->name, IMMEDIATEDATA))
768 			SET_PSTATE_REPLY_OPTIONAL(param);
769 	} else if (IS_TYPE_NUMBER(param)) {
770 		if (!strcmp(param->name, MAXRECVDATASEGMENTLENGTH))
771 			SET_PSTATE_REPLY_OPTIONAL(param);
772 		/*
773 		 * The GlobalSAN iSCSI Initiator for MacOSX does
774 		 * not respond to MaxBurstLength, FirstBurstLength,
775 		 * DefaultTime2Wait or DefaultTime2Retain parameter keys.
776 		 * So, we set them to 'reply optional' here, and assume the
777 		 * the defaults from iscsi_parameters.h if the initiator
778 		 * is not RFC compliant and the keys are not negotiated.
779 		 */
780 		if (!strcmp(param->name, MAXBURSTLENGTH))
781 			SET_PSTATE_REPLY_OPTIONAL(param);
782 		if (!strcmp(param->name, FIRSTBURSTLENGTH))
783 			SET_PSTATE_REPLY_OPTIONAL(param);
784 		if (!strcmp(param->name, DEFAULTTIME2WAIT))
785 			SET_PSTATE_REPLY_OPTIONAL(param);
786 		if (!strcmp(param->name, DEFAULTTIME2RETAIN))
787 			SET_PSTATE_REPLY_OPTIONAL(param);
788 		/*
789 		 * Required for gPXE iSCSI boot client
790 		 */
791 		if (!strcmp(param->name, MAXCONNECTIONS))
792 			SET_PSTATE_REPLY_OPTIONAL(param);
793 	} else if (IS_PHASE_DECLARATIVE(param))
794 		SET_PSTATE_REPLY_OPTIONAL(param);
795 }
796 
797 static int iscsi_check_boolean_value(struct iscsi_param *param, char *value)
798 {
799 	if (strcmp(value, YES) && strcmp(value, NO)) {
800 		pr_err("Illegal value for \"%s\", must be either"
801 			" \"%s\" or \"%s\".\n", param->name, YES, NO);
802 		return -1;
803 	}
804 
805 	return 0;
806 }
807 
808 static int iscsi_check_numerical_value(struct iscsi_param *param, char *value_ptr)
809 {
810 	char *tmpptr;
811 	int value = 0;
812 
813 	value = simple_strtoul(value_ptr, &tmpptr, 0);
814 
815 	if (IS_TYPERANGE_0_TO_2(param)) {
816 		if ((value < 0) || (value > 2)) {
817 			pr_err("Illegal value for \"%s\", must be"
818 				" between 0 and 2.\n", param->name);
819 			return -1;
820 		}
821 		return 0;
822 	}
823 	if (IS_TYPERANGE_0_TO_3600(param)) {
824 		if ((value < 0) || (value > 3600)) {
825 			pr_err("Illegal value for \"%s\", must be"
826 				" between 0 and 3600.\n", param->name);
827 			return -1;
828 		}
829 		return 0;
830 	}
831 	if (IS_TYPERANGE_0_TO_32767(param)) {
832 		if ((value < 0) || (value > 32767)) {
833 			pr_err("Illegal value for \"%s\", must be"
834 				" between 0 and 32767.\n", param->name);
835 			return -1;
836 		}
837 		return 0;
838 	}
839 	if (IS_TYPERANGE_0_TO_65535(param)) {
840 		if ((value < 0) || (value > 65535)) {
841 			pr_err("Illegal value for \"%s\", must be"
842 				" between 0 and 65535.\n", param->name);
843 			return -1;
844 		}
845 		return 0;
846 	}
847 	if (IS_TYPERANGE_1_TO_65535(param)) {
848 		if ((value < 1) || (value > 65535)) {
849 			pr_err("Illegal value for \"%s\", must be"
850 				" between 1 and 65535.\n", param->name);
851 			return -1;
852 		}
853 		return 0;
854 	}
855 	if (IS_TYPERANGE_2_TO_3600(param)) {
856 		if ((value < 2) || (value > 3600)) {
857 			pr_err("Illegal value for \"%s\", must be"
858 				" between 2 and 3600.\n", param->name);
859 			return -1;
860 		}
861 		return 0;
862 	}
863 	if (IS_TYPERANGE_512_TO_16777215(param)) {
864 		if ((value < 512) || (value > 16777215)) {
865 			pr_err("Illegal value for \"%s\", must be"
866 				" between 512 and 16777215.\n", param->name);
867 			return -1;
868 		}
869 		return 0;
870 	}
871 
872 	return 0;
873 }
874 
875 static int iscsi_check_numerical_range_value(struct iscsi_param *param, char *value)
876 {
877 	char *left_val_ptr = NULL, *right_val_ptr = NULL;
878 	char *tilde_ptr = NULL;
879 	u32 left_val, right_val, local_left_val;
880 
881 	if (strcmp(param->name, IFMARKINT) &&
882 	    strcmp(param->name, OFMARKINT)) {
883 		pr_err("Only parameters \"%s\" or \"%s\" may contain a"
884 		       " numerical range value.\n", IFMARKINT, OFMARKINT);
885 		return -1;
886 	}
887 
888 	if (IS_PSTATE_PROPOSER(param))
889 		return 0;
890 
891 	tilde_ptr = strchr(value, '~');
892 	if (!tilde_ptr) {
893 		pr_err("Unable to locate numerical range indicator"
894 			" \"~\" for \"%s\".\n", param->name);
895 		return -1;
896 	}
897 	*tilde_ptr = '\0';
898 
899 	left_val_ptr = value;
900 	right_val_ptr = value + strlen(left_val_ptr) + 1;
901 
902 	if (iscsi_check_numerical_value(param, left_val_ptr) < 0)
903 		return -1;
904 	if (iscsi_check_numerical_value(param, right_val_ptr) < 0)
905 		return -1;
906 
907 	left_val = simple_strtoul(left_val_ptr, NULL, 0);
908 	right_val = simple_strtoul(right_val_ptr, NULL, 0);
909 	*tilde_ptr = '~';
910 
911 	if (right_val < left_val) {
912 		pr_err("Numerical range for parameter \"%s\" contains"
913 			" a right value which is less than the left.\n",
914 				param->name);
915 		return -1;
916 	}
917 
918 	/*
919 	 * For now,  enforce reasonable defaults for [I,O]FMarkInt.
920 	 */
921 	tilde_ptr = strchr(param->value, '~');
922 	if (!tilde_ptr) {
923 		pr_err("Unable to locate numerical range indicator"
924 			" \"~\" for \"%s\".\n", param->name);
925 		return -1;
926 	}
927 	*tilde_ptr = '\0';
928 
929 	left_val_ptr = param->value;
930 	right_val_ptr = param->value + strlen(left_val_ptr) + 1;
931 
932 	local_left_val = simple_strtoul(left_val_ptr, NULL, 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 
960 static 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  *	This function is used to pick a value range number,  currently just
998  *	returns the lesser of both right values.
999  */
1000 static 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 
1023 static 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 (!strcmp(acceptor_values, proposer_values)) {
1050 				if (tmp2)
1051 					*tmp2 = ',';
1052 				goto out;
1053 			}
1054 			if (tmp2)
1055 				*tmp2++ = ',';
1056 
1057 			acceptor_values = tmp2;
1058 		} while (acceptor_values);
1059 		if (tmp1)
1060 			*tmp1++ = ',';
1061 		proposer_values = tmp1;
1062 	} while (proposer_values);
1063 
1064 out:
1065 	return proposer_values;
1066 }
1067 
1068 static int iscsi_check_acceptor_state(struct iscsi_param *param, char *value,
1069 				struct iscsi_conn *conn)
1070 {
1071 	u8 acceptor_boolean_value = 0, proposer_boolean_value = 0;
1072 	char *negoitated_value = NULL;
1073 
1074 	if (IS_PSTATE_ACCEPTOR(param)) {
1075 		pr_err("Received key \"%s\" twice, protocol error.\n",
1076 				param->name);
1077 		return -1;
1078 	}
1079 
1080 	if (IS_PSTATE_REJECT(param))
1081 		return 0;
1082 
1083 	if (IS_TYPE_BOOL_AND(param)) {
1084 		if (!strcmp(value, YES))
1085 			proposer_boolean_value = 1;
1086 		if (!strcmp(param->value, YES))
1087 			acceptor_boolean_value = 1;
1088 		if (acceptor_boolean_value && proposer_boolean_value)
1089 			do {} while (0);
1090 		else {
1091 			if (iscsi_update_param_value(param, NO) < 0)
1092 				return -1;
1093 			if (!proposer_boolean_value)
1094 				SET_PSTATE_REPLY_OPTIONAL(param);
1095 		}
1096 	} else if (IS_TYPE_BOOL_OR(param)) {
1097 		if (!strcmp(value, YES))
1098 			proposer_boolean_value = 1;
1099 		if (!strcmp(param->value, YES))
1100 			acceptor_boolean_value = 1;
1101 		if (acceptor_boolean_value || proposer_boolean_value) {
1102 			if (iscsi_update_param_value(param, YES) < 0)
1103 				return -1;
1104 			if (proposer_boolean_value)
1105 				SET_PSTATE_REPLY_OPTIONAL(param);
1106 		}
1107 	} else if (IS_TYPE_NUMBER(param)) {
1108 		char *tmpptr, buf[10];
1109 		u32 acceptor_value = simple_strtoul(param->value, &tmpptr, 0);
1110 		u32 proposer_value = simple_strtoul(value, &tmpptr, 0);
1111 
1112 		memset(buf, 0, 10);
1113 
1114 		if (!strcmp(param->name, MAXCONNECTIONS) ||
1115 		    !strcmp(param->name, MAXBURSTLENGTH) ||
1116 		    !strcmp(param->name, FIRSTBURSTLENGTH) ||
1117 		    !strcmp(param->name, MAXOUTSTANDINGR2T) ||
1118 		    !strcmp(param->name, DEFAULTTIME2RETAIN) ||
1119 		    !strcmp(param->name, ERRORRECOVERYLEVEL)) {
1120 			if (proposer_value > acceptor_value) {
1121 				sprintf(buf, "%u", acceptor_value);
1122 				if (iscsi_update_param_value(param,
1123 						&buf[0]) < 0)
1124 					return -1;
1125 			} else {
1126 				if (iscsi_update_param_value(param, value) < 0)
1127 					return -1;
1128 			}
1129 		} else if (!strcmp(param->name, DEFAULTTIME2WAIT)) {
1130 			if (acceptor_value > proposer_value) {
1131 				sprintf(buf, "%u", acceptor_value);
1132 				if (iscsi_update_param_value(param,
1133 						&buf[0]) < 0)
1134 					return -1;
1135 			} else {
1136 				if (iscsi_update_param_value(param, value) < 0)
1137 					return -1;
1138 			}
1139 		} else {
1140 			if (iscsi_update_param_value(param, value) < 0)
1141 				return -1;
1142 		}
1143 
1144 		if (!strcmp(param->name, MAXRECVDATASEGMENTLENGTH)) {
1145 			struct iscsi_param *param_mxdsl;
1146 			unsigned long long tmp;
1147 			int rc;
1148 
1149 			rc = strict_strtoull(param->value, 0, &tmp);
1150 			if (rc < 0)
1151 				return -1;
1152 
1153 			conn->conn_ops->MaxRecvDataSegmentLength = tmp;
1154 			pr_debug("Saving op->MaxRecvDataSegmentLength from"
1155 				" original initiator received value: %u\n",
1156 				conn->conn_ops->MaxRecvDataSegmentLength);
1157 
1158 			param_mxdsl = iscsi_find_param_from_key(
1159 						MAXXMITDATASEGMENTLENGTH,
1160 						conn->param_list);
1161 			if (!param_mxdsl)
1162 				return -1;
1163 
1164 			rc = iscsi_update_param_value(param,
1165 						param_mxdsl->value);
1166 			if (rc < 0)
1167 				return -1;
1168 
1169 			pr_debug("Updated %s to target MXDSL value: %s\n",
1170 					param->name, param->value);
1171 		}
1172 
1173 	} else if (IS_TYPE_NUMBER_RANGE(param)) {
1174 		negoitated_value = iscsi_get_value_from_number_range(
1175 					param, value);
1176 		if (!negoitated_value)
1177 			return -1;
1178 		if (iscsi_update_param_value(param, negoitated_value) < 0)
1179 			return -1;
1180 	} else if (IS_TYPE_VALUE_LIST(param)) {
1181 		negoitated_value = iscsi_check_valuelist_for_support(
1182 					param, value);
1183 		if (!negoitated_value) {
1184 			pr_err("Proposer's value list \"%s\" contains"
1185 				" no valid values from Acceptor's value list"
1186 				" \"%s\".\n", value, param->value);
1187 			return -1;
1188 		}
1189 		if (iscsi_update_param_value(param, negoitated_value) < 0)
1190 			return -1;
1191 	} else if (IS_PHASE_DECLARATIVE(param)) {
1192 		if (iscsi_update_param_value(param, value) < 0)
1193 			return -1;
1194 		SET_PSTATE_REPLY_OPTIONAL(param);
1195 	}
1196 
1197 	return 0;
1198 }
1199 
1200 static int iscsi_check_proposer_state(struct iscsi_param *param, char *value)
1201 {
1202 	if (IS_PSTATE_RESPONSE_GOT(param)) {
1203 		pr_err("Received key \"%s\" twice, protocol error.\n",
1204 				param->name);
1205 		return -1;
1206 	}
1207 
1208 	if (IS_TYPE_NUMBER_RANGE(param)) {
1209 		u32 left_val = 0, right_val = 0, recieved_value = 0;
1210 		char *left_val_ptr = NULL, *right_val_ptr = NULL;
1211 		char *tilde_ptr = NULL;
1212 
1213 		if (!strcmp(value, IRRELEVANT) || !strcmp(value, REJECT)) {
1214 			if (iscsi_update_param_value(param, value) < 0)
1215 				return -1;
1216 			return 0;
1217 		}
1218 
1219 		tilde_ptr = strchr(value, '~');
1220 		if (tilde_ptr) {
1221 			pr_err("Illegal \"~\" in response for \"%s\".\n",
1222 					param->name);
1223 			return -1;
1224 		}
1225 		tilde_ptr = strchr(param->value, '~');
1226 		if (!tilde_ptr) {
1227 			pr_err("Unable to locate numerical range"
1228 				" indicator \"~\" for \"%s\".\n", param->name);
1229 			return -1;
1230 		}
1231 		*tilde_ptr = '\0';
1232 
1233 		left_val_ptr = param->value;
1234 		right_val_ptr = param->value + strlen(left_val_ptr) + 1;
1235 		left_val = simple_strtoul(left_val_ptr, NULL, 0);
1236 		right_val = simple_strtoul(right_val_ptr, NULL, 0);
1237 		recieved_value = simple_strtoul(value, NULL, 0);
1238 
1239 		*tilde_ptr = '~';
1240 
1241 		if ((recieved_value < left_val) ||
1242 		    (recieved_value > right_val)) {
1243 			pr_err("Illegal response \"%s=%u\", value must"
1244 				" be between %u and %u.\n", param->name,
1245 				recieved_value, left_val, right_val);
1246 			return -1;
1247 		}
1248 	} else if (IS_TYPE_VALUE_LIST(param)) {
1249 		char *comma_ptr = NULL, *tmp_ptr = NULL;
1250 
1251 		comma_ptr = strchr(value, ',');
1252 		if (comma_ptr) {
1253 			pr_err("Illegal \",\" in response for \"%s\".\n",
1254 					param->name);
1255 			return -1;
1256 		}
1257 
1258 		tmp_ptr = iscsi_check_valuelist_for_support(param, value);
1259 		if (!tmp_ptr)
1260 			return -1;
1261 	}
1262 
1263 	if (iscsi_update_param_value(param, value) < 0)
1264 		return -1;
1265 
1266 	return 0;
1267 }
1268 
1269 static int iscsi_check_value(struct iscsi_param *param, char *value)
1270 {
1271 	char *comma_ptr = NULL;
1272 
1273 	if (!strcmp(value, REJECT)) {
1274 		if (!strcmp(param->name, IFMARKINT) ||
1275 		    !strcmp(param->name, OFMARKINT)) {
1276 			/*
1277 			 * Reject is not fatal for [I,O]FMarkInt,  and causes
1278 			 * [I,O]FMarker to be reset to No. (See iSCSI v20 A.3.2)
1279 			 */
1280 			SET_PSTATE_REJECT(param);
1281 			return 0;
1282 		}
1283 		pr_err("Received %s=%s\n", param->name, value);
1284 		return -1;
1285 	}
1286 	if (!strcmp(value, IRRELEVANT)) {
1287 		pr_debug("Received %s=%s\n", param->name, value);
1288 		SET_PSTATE_IRRELEVANT(param);
1289 		return 0;
1290 	}
1291 	if (!strcmp(value, NOTUNDERSTOOD)) {
1292 		if (!IS_PSTATE_PROPOSER(param)) {
1293 			pr_err("Received illegal offer %s=%s\n",
1294 				param->name, value);
1295 			return -1;
1296 		}
1297 
1298 /* #warning FIXME: Add check for X-ExtensionKey here */
1299 		pr_err("Standard iSCSI key \"%s\" cannot be answered"
1300 			" with \"%s\", protocol error.\n", param->name, value);
1301 		return -1;
1302 	}
1303 
1304 	do {
1305 		comma_ptr = NULL;
1306 		comma_ptr = strchr(value, ',');
1307 
1308 		if (comma_ptr && !IS_TYPE_VALUE_LIST(param)) {
1309 			pr_err("Detected value separator \",\", but"
1310 				" key \"%s\" does not allow a value list,"
1311 				" protocol error.\n", param->name);
1312 			return -1;
1313 		}
1314 		if (comma_ptr)
1315 			*comma_ptr = '\0';
1316 
1317 		if (strlen(value) > VALUE_MAXLEN) {
1318 			pr_err("Value for key \"%s\" exceeds %d,"
1319 				" protocol error.\n", param->name,
1320 				VALUE_MAXLEN);
1321 			return -1;
1322 		}
1323 
1324 		if (IS_TYPE_BOOL_AND(param) || IS_TYPE_BOOL_OR(param)) {
1325 			if (iscsi_check_boolean_value(param, value) < 0)
1326 				return -1;
1327 		} else if (IS_TYPE_NUMBER(param)) {
1328 			if (iscsi_check_numerical_value(param, value) < 0)
1329 				return -1;
1330 		} else if (IS_TYPE_NUMBER_RANGE(param)) {
1331 			if (iscsi_check_numerical_range_value(param, value) < 0)
1332 				return -1;
1333 		} else if (IS_TYPE_STRING(param) || IS_TYPE_VALUE_LIST(param)) {
1334 			if (iscsi_check_string_or_list_value(param, value) < 0)
1335 				return -1;
1336 		} else {
1337 			pr_err("Huh? 0x%02x\n", param->type);
1338 			return -1;
1339 		}
1340 
1341 		if (comma_ptr)
1342 			*comma_ptr++ = ',';
1343 
1344 		value = comma_ptr;
1345 	} while (value);
1346 
1347 	return 0;
1348 }
1349 
1350 static struct iscsi_param *__iscsi_check_key(
1351 	char *key,
1352 	int sender,
1353 	struct iscsi_param_list *param_list)
1354 {
1355 	struct iscsi_param *param;
1356 
1357 	if (strlen(key) > KEY_MAXLEN) {
1358 		pr_err("Length of key name \"%s\" exceeds %d.\n",
1359 			key, KEY_MAXLEN);
1360 		return NULL;
1361 	}
1362 
1363 	param = iscsi_find_param_from_key(key, param_list);
1364 	if (!param)
1365 		return NULL;
1366 
1367 	if ((sender & SENDER_INITIATOR) && !IS_SENDER_INITIATOR(param)) {
1368 		pr_err("Key \"%s\" may not be sent to %s,"
1369 			" protocol error.\n", param->name,
1370 			(sender & SENDER_RECEIVER) ? "target" : "initiator");
1371 		return NULL;
1372 	}
1373 
1374 	if ((sender & SENDER_TARGET) && !IS_SENDER_TARGET(param)) {
1375 		pr_err("Key \"%s\" may not be sent to %s,"
1376 			" protocol error.\n", param->name,
1377 			(sender & SENDER_RECEIVER) ? "initiator" : "target");
1378 		return NULL;
1379 	}
1380 
1381 	return param;
1382 }
1383 
1384 static struct iscsi_param *iscsi_check_key(
1385 	char *key,
1386 	int phase,
1387 	int sender,
1388 	struct iscsi_param_list *param_list)
1389 {
1390 	struct iscsi_param *param;
1391 	/*
1392 	 * Key name length must not exceed 63 bytes. (See iSCSI v20 5.1)
1393 	 */
1394 	if (strlen(key) > KEY_MAXLEN) {
1395 		pr_err("Length of key name \"%s\" exceeds %d.\n",
1396 			key, KEY_MAXLEN);
1397 		return NULL;
1398 	}
1399 
1400 	param = iscsi_find_param_from_key(key, param_list);
1401 	if (!param)
1402 		return NULL;
1403 
1404 	if ((sender & SENDER_INITIATOR) && !IS_SENDER_INITIATOR(param)) {
1405 		pr_err("Key \"%s\" may not be sent to %s,"
1406 			" protocol error.\n", param->name,
1407 			(sender & SENDER_RECEIVER) ? "target" : "initiator");
1408 		return NULL;
1409 	}
1410 	if ((sender & SENDER_TARGET) && !IS_SENDER_TARGET(param)) {
1411 		pr_err("Key \"%s\" may not be sent to %s,"
1412 				" protocol error.\n", param->name,
1413 			(sender & SENDER_RECEIVER) ? "initiator" : "target");
1414 		return NULL;
1415 	}
1416 
1417 	if (IS_PSTATE_ACCEPTOR(param)) {
1418 		pr_err("Key \"%s\" received twice, protocol error.\n",
1419 				key);
1420 		return NULL;
1421 	}
1422 
1423 	if (!phase)
1424 		return param;
1425 
1426 	if (!(param->phase & phase)) {
1427 		pr_err("Key \"%s\" may not be negotiated during ",
1428 				param->name);
1429 		switch (phase) {
1430 		case PHASE_SECURITY:
1431 			pr_debug("Security phase.\n");
1432 			break;
1433 		case PHASE_OPERATIONAL:
1434 			pr_debug("Operational phase.\n");
1435 		default:
1436 			pr_debug("Unknown phase.\n");
1437 		}
1438 		return NULL;
1439 	}
1440 
1441 	return param;
1442 }
1443 
1444 static int iscsi_enforce_integrity_rules(
1445 	u8 phase,
1446 	struct iscsi_param_list *param_list)
1447 {
1448 	char *tmpptr;
1449 	u8 DataSequenceInOrder = 0;
1450 	u8 ErrorRecoveryLevel = 0, SessionType = 0;
1451 	u8 IFMarker = 0, OFMarker = 0;
1452 	u8 IFMarkInt_Reject = 1, OFMarkInt_Reject = 1;
1453 	u32 FirstBurstLength = 0, MaxBurstLength = 0;
1454 	struct iscsi_param *param = NULL;
1455 
1456 	list_for_each_entry(param, &param_list->param_list, p_list) {
1457 		if (!(param->phase & phase))
1458 			continue;
1459 		if (!strcmp(param->name, SESSIONTYPE))
1460 			if (!strcmp(param->value, NORMAL))
1461 				SessionType = 1;
1462 		if (!strcmp(param->name, ERRORRECOVERYLEVEL))
1463 			ErrorRecoveryLevel = simple_strtoul(param->value,
1464 					&tmpptr, 0);
1465 		if (!strcmp(param->name, DATASEQUENCEINORDER))
1466 			if (!strcmp(param->value, YES))
1467 				DataSequenceInOrder = 1;
1468 		if (!strcmp(param->name, MAXBURSTLENGTH))
1469 			MaxBurstLength = simple_strtoul(param->value,
1470 					&tmpptr, 0);
1471 		if (!strcmp(param->name, IFMARKER))
1472 			if (!strcmp(param->value, YES))
1473 				IFMarker = 1;
1474 		if (!strcmp(param->name, OFMARKER))
1475 			if (!strcmp(param->value, YES))
1476 				OFMarker = 1;
1477 		if (!strcmp(param->name, IFMARKINT))
1478 			if (!strcmp(param->value, REJECT))
1479 				IFMarkInt_Reject = 1;
1480 		if (!strcmp(param->name, OFMARKINT))
1481 			if (!strcmp(param->value, REJECT))
1482 				OFMarkInt_Reject = 1;
1483 	}
1484 
1485 	list_for_each_entry(param, &param_list->param_list, p_list) {
1486 		if (!(param->phase & phase))
1487 			continue;
1488 		if (!SessionType && (!IS_PSTATE_ACCEPTOR(param) &&
1489 		     (strcmp(param->name, IFMARKER) &&
1490 		      strcmp(param->name, OFMARKER) &&
1491 		      strcmp(param->name, IFMARKINT) &&
1492 		      strcmp(param->name, OFMARKINT))))
1493 			continue;
1494 		if (!strcmp(param->name, MAXOUTSTANDINGR2T) &&
1495 		    DataSequenceInOrder && (ErrorRecoveryLevel > 0)) {
1496 			if (strcmp(param->value, "1")) {
1497 				if (iscsi_update_param_value(param, "1") < 0)
1498 					return -1;
1499 				pr_debug("Reset \"%s\" to \"%s\".\n",
1500 					param->name, param->value);
1501 			}
1502 		}
1503 		if (!strcmp(param->name, MAXCONNECTIONS) && !SessionType) {
1504 			if (strcmp(param->value, "1")) {
1505 				if (iscsi_update_param_value(param, "1") < 0)
1506 					return -1;
1507 				pr_debug("Reset \"%s\" to \"%s\".\n",
1508 					param->name, param->value);
1509 			}
1510 		}
1511 		if (!strcmp(param->name, FIRSTBURSTLENGTH)) {
1512 			FirstBurstLength = simple_strtoul(param->value,
1513 					&tmpptr, 0);
1514 			if (FirstBurstLength > MaxBurstLength) {
1515 				char tmpbuf[10];
1516 				memset(tmpbuf, 0, 10);
1517 				sprintf(tmpbuf, "%u", MaxBurstLength);
1518 				if (iscsi_update_param_value(param, tmpbuf))
1519 					return -1;
1520 				pr_debug("Reset \"%s\" to \"%s\".\n",
1521 					param->name, param->value);
1522 			}
1523 		}
1524 		if (!strcmp(param->name, IFMARKER) && IFMarkInt_Reject) {
1525 			if (iscsi_update_param_value(param, NO) < 0)
1526 				return -1;
1527 			IFMarker = 0;
1528 			pr_debug("Reset \"%s\" to \"%s\".\n",
1529 					param->name, param->value);
1530 		}
1531 		if (!strcmp(param->name, OFMARKER) && OFMarkInt_Reject) {
1532 			if (iscsi_update_param_value(param, NO) < 0)
1533 				return -1;
1534 			OFMarker = 0;
1535 			pr_debug("Reset \"%s\" to \"%s\".\n",
1536 					 param->name, param->value);
1537 		}
1538 		if (!strcmp(param->name, IFMARKINT) && !IFMarker) {
1539 			if (!strcmp(param->value, REJECT))
1540 				continue;
1541 			param->state &= ~PSTATE_NEGOTIATE;
1542 			if (iscsi_update_param_value(param, IRRELEVANT) < 0)
1543 				return -1;
1544 			pr_debug("Reset \"%s\" to \"%s\".\n",
1545 					param->name, param->value);
1546 		}
1547 		if (!strcmp(param->name, OFMARKINT) && !OFMarker) {
1548 			if (!strcmp(param->value, REJECT))
1549 				continue;
1550 			param->state &= ~PSTATE_NEGOTIATE;
1551 			if (iscsi_update_param_value(param, IRRELEVANT) < 0)
1552 				return -1;
1553 			pr_debug("Reset \"%s\" to \"%s\".\n",
1554 					param->name, param->value);
1555 		}
1556 	}
1557 
1558 	return 0;
1559 }
1560 
1561 int iscsi_decode_text_input(
1562 	u8 phase,
1563 	u8 sender,
1564 	char *textbuf,
1565 	u32 length,
1566 	struct iscsi_conn *conn)
1567 {
1568 	struct iscsi_param_list *param_list = conn->param_list;
1569 	char *tmpbuf, *start = NULL, *end = NULL;
1570 
1571 	tmpbuf = kzalloc(length + 1, GFP_KERNEL);
1572 	if (!tmpbuf) {
1573 		pr_err("Unable to allocate memory for tmpbuf.\n");
1574 		return -1;
1575 	}
1576 
1577 	memcpy(tmpbuf, textbuf, length);
1578 	tmpbuf[length] = '\0';
1579 	start = tmpbuf;
1580 	end = (start + length);
1581 
1582 	while (start < end) {
1583 		char *key, *value;
1584 		struct iscsi_param *param;
1585 
1586 		if (iscsi_extract_key_value(start, &key, &value) < 0) {
1587 			kfree(tmpbuf);
1588 			return -1;
1589 		}
1590 
1591 		pr_debug("Got key: %s=%s\n", key, value);
1592 
1593 		if (phase & PHASE_SECURITY) {
1594 			if (iscsi_check_for_auth_key(key) > 0) {
1595 				char *tmpptr = key + strlen(key);
1596 				*tmpptr = '=';
1597 				kfree(tmpbuf);
1598 				return 1;
1599 			}
1600 		}
1601 
1602 		param = iscsi_check_key(key, phase, sender, param_list);
1603 		if (!param) {
1604 			if (iscsi_add_notunderstood_response(key,
1605 					value, param_list) < 0) {
1606 				kfree(tmpbuf);
1607 				return -1;
1608 			}
1609 			start += strlen(key) + strlen(value) + 2;
1610 			continue;
1611 		}
1612 		if (iscsi_check_value(param, value) < 0) {
1613 			kfree(tmpbuf);
1614 			return -1;
1615 		}
1616 
1617 		start += strlen(key) + strlen(value) + 2;
1618 
1619 		if (IS_PSTATE_PROPOSER(param)) {
1620 			if (iscsi_check_proposer_state(param, value) < 0) {
1621 				kfree(tmpbuf);
1622 				return -1;
1623 			}
1624 			SET_PSTATE_RESPONSE_GOT(param);
1625 		} else {
1626 			if (iscsi_check_acceptor_state(param, value, conn) < 0) {
1627 				kfree(tmpbuf);
1628 				return -1;
1629 			}
1630 			SET_PSTATE_ACCEPTOR(param);
1631 		}
1632 	}
1633 
1634 	kfree(tmpbuf);
1635 	return 0;
1636 }
1637 
1638 int iscsi_encode_text_output(
1639 	u8 phase,
1640 	u8 sender,
1641 	char *textbuf,
1642 	u32 *length,
1643 	struct iscsi_param_list *param_list)
1644 {
1645 	char *output_buf = NULL;
1646 	struct iscsi_extra_response *er;
1647 	struct iscsi_param *param;
1648 
1649 	output_buf = textbuf + *length;
1650 
1651 	if (iscsi_enforce_integrity_rules(phase, param_list) < 0)
1652 		return -1;
1653 
1654 	list_for_each_entry(param, &param_list->param_list, p_list) {
1655 		if (!(param->sender & sender))
1656 			continue;
1657 		if (IS_PSTATE_ACCEPTOR(param) &&
1658 		    !IS_PSTATE_RESPONSE_SENT(param) &&
1659 		    !IS_PSTATE_REPLY_OPTIONAL(param) &&
1660 		    (param->phase & phase)) {
1661 			*length += sprintf(output_buf, "%s=%s",
1662 				param->name, param->value);
1663 			*length += 1;
1664 			output_buf = textbuf + *length;
1665 			SET_PSTATE_RESPONSE_SENT(param);
1666 			pr_debug("Sending key: %s=%s\n",
1667 				param->name, param->value);
1668 			continue;
1669 		}
1670 		if (IS_PSTATE_NEGOTIATE(param) &&
1671 		    !IS_PSTATE_ACCEPTOR(param) &&
1672 		    !IS_PSTATE_PROPOSER(param) &&
1673 		    (param->phase & phase)) {
1674 			*length += sprintf(output_buf, "%s=%s",
1675 				param->name, param->value);
1676 			*length += 1;
1677 			output_buf = textbuf + *length;
1678 			SET_PSTATE_PROPOSER(param);
1679 			iscsi_check_proposer_for_optional_reply(param);
1680 			pr_debug("Sending key: %s=%s\n",
1681 				param->name, param->value);
1682 		}
1683 	}
1684 
1685 	list_for_each_entry(er, &param_list->extra_response_list, er_list) {
1686 		*length += sprintf(output_buf, "%s=%s", er->key, er->value);
1687 		*length += 1;
1688 		output_buf = textbuf + *length;
1689 		pr_debug("Sending key: %s=%s\n", er->key, er->value);
1690 	}
1691 	iscsi_release_extra_responses(param_list);
1692 
1693 	return 0;
1694 }
1695 
1696 int iscsi_check_negotiated_keys(struct iscsi_param_list *param_list)
1697 {
1698 	int ret = 0;
1699 	struct iscsi_param *param;
1700 
1701 	list_for_each_entry(param, &param_list->param_list, p_list) {
1702 		if (IS_PSTATE_NEGOTIATE(param) &&
1703 		    IS_PSTATE_PROPOSER(param) &&
1704 		    !IS_PSTATE_RESPONSE_GOT(param) &&
1705 		    !IS_PSTATE_REPLY_OPTIONAL(param) &&
1706 		    !IS_PHASE_DECLARATIVE(param)) {
1707 			pr_err("No response for proposed key \"%s\".\n",
1708 					param->name);
1709 			ret = -1;
1710 		}
1711 	}
1712 
1713 	return ret;
1714 }
1715 
1716 int iscsi_change_param_value(
1717 	char *keyvalue,
1718 	struct iscsi_param_list *param_list,
1719 	int check_key)
1720 {
1721 	char *key = NULL, *value = NULL;
1722 	struct iscsi_param *param;
1723 	int sender = 0;
1724 
1725 	if (iscsi_extract_key_value(keyvalue, &key, &value) < 0)
1726 		return -1;
1727 
1728 	if (!check_key) {
1729 		param = __iscsi_check_key(keyvalue, sender, param_list);
1730 		if (!param)
1731 			return -1;
1732 	} else {
1733 		param = iscsi_check_key(keyvalue, 0, sender, param_list);
1734 		if (!param)
1735 			return -1;
1736 
1737 		param->set_param = 1;
1738 		if (iscsi_check_value(param, value) < 0) {
1739 			param->set_param = 0;
1740 			return -1;
1741 		}
1742 		param->set_param = 0;
1743 	}
1744 
1745 	if (iscsi_update_param_value(param, value) < 0)
1746 		return -1;
1747 
1748 	return 0;
1749 }
1750 
1751 void iscsi_set_connection_parameters(
1752 	struct iscsi_conn_ops *ops,
1753 	struct iscsi_param_list *param_list)
1754 {
1755 	char *tmpptr;
1756 	struct iscsi_param *param;
1757 
1758 	pr_debug("---------------------------------------------------"
1759 			"---------------\n");
1760 	list_for_each_entry(param, &param_list->param_list, p_list) {
1761 		/*
1762 		 * Special case to set MAXXMITDATASEGMENTLENGTH from the
1763 		 * target requested MaxRecvDataSegmentLength, even though
1764 		 * this key is not sent over the wire.
1765 		 */
1766 		if (!strcmp(param->name, MAXXMITDATASEGMENTLENGTH)) {
1767 			ops->MaxXmitDataSegmentLength =
1768 				simple_strtoul(param->value, &tmpptr, 0);
1769 			pr_debug("MaxXmitDataSegmentLength:     %s\n",
1770 				param->value);
1771 		}
1772 
1773 		if (!IS_PSTATE_ACCEPTOR(param) && !IS_PSTATE_PROPOSER(param))
1774 			continue;
1775 		if (!strcmp(param->name, AUTHMETHOD)) {
1776 			pr_debug("AuthMethod:                   %s\n",
1777 				param->value);
1778 		} else if (!strcmp(param->name, HEADERDIGEST)) {
1779 			ops->HeaderDigest = !strcmp(param->value, CRC32C);
1780 			pr_debug("HeaderDigest:                 %s\n",
1781 				param->value);
1782 		} else if (!strcmp(param->name, DATADIGEST)) {
1783 			ops->DataDigest = !strcmp(param->value, CRC32C);
1784 			pr_debug("DataDigest:                   %s\n",
1785 				param->value);
1786 		} else if (!strcmp(param->name, MAXRECVDATASEGMENTLENGTH)) {
1787 			/*
1788 			 * At this point iscsi_check_acceptor_state() will have
1789 			 * set ops->MaxRecvDataSegmentLength from the original
1790 			 * initiator provided value.
1791 			 */
1792 			pr_debug("MaxRecvDataSegmentLength:     %u\n",
1793 				ops->MaxRecvDataSegmentLength);
1794 		} else if (!strcmp(param->name, OFMARKER)) {
1795 			ops->OFMarker = !strcmp(param->value, YES);
1796 			pr_debug("OFMarker:                     %s\n",
1797 				param->value);
1798 		} else if (!strcmp(param->name, IFMARKER)) {
1799 			ops->IFMarker = !strcmp(param->value, YES);
1800 			pr_debug("IFMarker:                     %s\n",
1801 				param->value);
1802 		} else if (!strcmp(param->name, OFMARKINT)) {
1803 			ops->OFMarkInt =
1804 				simple_strtoul(param->value, &tmpptr, 0);
1805 			pr_debug("OFMarkInt:                    %s\n",
1806 				param->value);
1807 		} else if (!strcmp(param->name, IFMARKINT)) {
1808 			ops->IFMarkInt =
1809 				simple_strtoul(param->value, &tmpptr, 0);
1810 			pr_debug("IFMarkInt:                    %s\n",
1811 				param->value);
1812 		}
1813 	}
1814 	pr_debug("----------------------------------------------------"
1815 			"--------------\n");
1816 }
1817 
1818 void iscsi_set_session_parameters(
1819 	struct iscsi_sess_ops *ops,
1820 	struct iscsi_param_list *param_list,
1821 	int leading)
1822 {
1823 	char *tmpptr;
1824 	struct iscsi_param *param;
1825 
1826 	pr_debug("----------------------------------------------------"
1827 			"--------------\n");
1828 	list_for_each_entry(param, &param_list->param_list, p_list) {
1829 		if (!IS_PSTATE_ACCEPTOR(param) && !IS_PSTATE_PROPOSER(param))
1830 			continue;
1831 		if (!strcmp(param->name, INITIATORNAME)) {
1832 			if (!param->value)
1833 				continue;
1834 			if (leading)
1835 				snprintf(ops->InitiatorName,
1836 						sizeof(ops->InitiatorName),
1837 						"%s", param->value);
1838 			pr_debug("InitiatorName:                %s\n",
1839 				param->value);
1840 		} else if (!strcmp(param->name, INITIATORALIAS)) {
1841 			if (!param->value)
1842 				continue;
1843 			snprintf(ops->InitiatorAlias,
1844 						sizeof(ops->InitiatorAlias),
1845 						"%s", param->value);
1846 			pr_debug("InitiatorAlias:               %s\n",
1847 				param->value);
1848 		} else if (!strcmp(param->name, TARGETNAME)) {
1849 			if (!param->value)
1850 				continue;
1851 			if (leading)
1852 				snprintf(ops->TargetName,
1853 						sizeof(ops->TargetName),
1854 						"%s", param->value);
1855 			pr_debug("TargetName:                   %s\n",
1856 				param->value);
1857 		} else if (!strcmp(param->name, TARGETALIAS)) {
1858 			if (!param->value)
1859 				continue;
1860 			snprintf(ops->TargetAlias, sizeof(ops->TargetAlias),
1861 					"%s", param->value);
1862 			pr_debug("TargetAlias:                  %s\n",
1863 				param->value);
1864 		} else if (!strcmp(param->name, TARGETPORTALGROUPTAG)) {
1865 			ops->TargetPortalGroupTag =
1866 				simple_strtoul(param->value, &tmpptr, 0);
1867 			pr_debug("TargetPortalGroupTag:         %s\n",
1868 				param->value);
1869 		} else if (!strcmp(param->name, MAXCONNECTIONS)) {
1870 			ops->MaxConnections =
1871 				simple_strtoul(param->value, &tmpptr, 0);
1872 			pr_debug("MaxConnections:               %s\n",
1873 				param->value);
1874 		} else if (!strcmp(param->name, INITIALR2T)) {
1875 			ops->InitialR2T = !strcmp(param->value, YES);
1876 			 pr_debug("InitialR2T:                   %s\n",
1877 				param->value);
1878 		} else if (!strcmp(param->name, IMMEDIATEDATA)) {
1879 			ops->ImmediateData = !strcmp(param->value, YES);
1880 			pr_debug("ImmediateData:                %s\n",
1881 				param->value);
1882 		} else if (!strcmp(param->name, MAXBURSTLENGTH)) {
1883 			ops->MaxBurstLength =
1884 				simple_strtoul(param->value, &tmpptr, 0);
1885 			pr_debug("MaxBurstLength:               %s\n",
1886 				param->value);
1887 		} else if (!strcmp(param->name, FIRSTBURSTLENGTH)) {
1888 			ops->FirstBurstLength =
1889 				simple_strtoul(param->value, &tmpptr, 0);
1890 			pr_debug("FirstBurstLength:             %s\n",
1891 				param->value);
1892 		} else if (!strcmp(param->name, DEFAULTTIME2WAIT)) {
1893 			ops->DefaultTime2Wait =
1894 				simple_strtoul(param->value, &tmpptr, 0);
1895 			pr_debug("DefaultTime2Wait:             %s\n",
1896 				param->value);
1897 		} else if (!strcmp(param->name, DEFAULTTIME2RETAIN)) {
1898 			ops->DefaultTime2Retain =
1899 				simple_strtoul(param->value, &tmpptr, 0);
1900 			pr_debug("DefaultTime2Retain:           %s\n",
1901 				param->value);
1902 		} else if (!strcmp(param->name, MAXOUTSTANDINGR2T)) {
1903 			ops->MaxOutstandingR2T =
1904 				simple_strtoul(param->value, &tmpptr, 0);
1905 			pr_debug("MaxOutstandingR2T:            %s\n",
1906 				param->value);
1907 		} else if (!strcmp(param->name, DATAPDUINORDER)) {
1908 			ops->DataPDUInOrder = !strcmp(param->value, YES);
1909 			pr_debug("DataPDUInOrder:               %s\n",
1910 				param->value);
1911 		} else if (!strcmp(param->name, DATASEQUENCEINORDER)) {
1912 			ops->DataSequenceInOrder = !strcmp(param->value, YES);
1913 			pr_debug("DataSequenceInOrder:          %s\n",
1914 				param->value);
1915 		} else if (!strcmp(param->name, ERRORRECOVERYLEVEL)) {
1916 			ops->ErrorRecoveryLevel =
1917 				simple_strtoul(param->value, &tmpptr, 0);
1918 			pr_debug("ErrorRecoveryLevel:           %s\n",
1919 				param->value);
1920 		} else if (!strcmp(param->name, SESSIONTYPE)) {
1921 			ops->SessionType = !strcmp(param->value, DISCOVERY);
1922 			pr_debug("SessionType:                  %s\n",
1923 				param->value);
1924 		}
1925 	}
1926 	pr_debug("----------------------------------------------------"
1927 			"--------------\n");
1928 
1929 }
1930