aboutsummaryrefslogtreecommitdiffstats
path: root/drivers/target/iscsi/iscsi_target_login.c
blob: 0694d9b1bce6a4e066a7bba1b1ef5f870b4b51d7 (plain) (blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
1001
1002
1003
1004
1005
1006
1007
1008
1009
1010
1011
1012
1013
1014
1015
1016
1017
1018
1019
1020
1021
1022
1023
1024
1025
1026
1027
1028
1029
1030
1031
1032
1033
1034
1035
1036
1037
1038
1039
1040
1041
1042
1043
1044
1045
1046
1047
1048
1049
1050
1051
1052
1053
1054
1055
1056
1057
1058
1059
1060
1061
1062
1063
1064
1065
1066
1067
1068
1069
1070
1071
1072
1073
1074
1075
1076
1077
1078
1079
1080
1081
1082
1083
1084
1085
1086
1087
1088
1089
1090
1091
1092
1093
1094
1095
1096
1097
1098
1099
1100
1101
1102
1103
1104
1105
1106
1107
1108
1109
1110
1111
1112
1113
1114
1115
1116
1117
1118
1119
1120
1121
1122
1123
1124
1125
1126
1127
1128
1129
1130
1131
1132
1133
1134
1135
1136
1137
1138
1139
1140
1141
1142
1143
1144
1145
1146
1147
1148
1149
1150
1151
1152
1153
1154
1155
1156
1157
1158
1159
1160
1161
1162
1163
1164
1165
1166
1167
1168
1169
1170
1171
1172
1173
1174
1175
1176
1177
1178
1179
1180
1181
1182
1183
1184
1185
1186
1187
1188
1189
1190
1191
1192
1193
1194
1195
1196
1197
1198
1199
1200
1201
1202
1203
1204
/*******************************************************************************
 * This file contains the login functions used by the iSCSI Target driver.
 *
 * \u00a9 Copyright 2007-2011 RisingTide Systems LLC.
 *
 * Licensed to the Linux Foundation under the General Public License (GPL) version 2.
 *
 * Author: Nicholas A. Bellinger <nab@linux-iscsi.org>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 ******************************************************************************/

#include <linux/string.h>
#include <linux/kthread.h>
#include <linux/crypto.h>
#include <linux/idr.h>
#include <scsi/iscsi_proto.h>
#include <target/target_core_base.h>
#include <target/target_core_fabric.h>

#include "iscsi_target_core.h"
#include "iscsi_target_tq.h"
#include "iscsi_target_device.h"
#include "iscsi_target_nego.h"
#include "iscsi_target_erl0.h"
#include "iscsi_target_erl2.h"
#include "iscsi_target_login.h"
#include "iscsi_target_stat.h"
#include "iscsi_target_tpg.h"
#include "iscsi_target_util.h"
#include "iscsi_target.h"
#include "iscsi_target_parameters.h"

extern struct idr sess_idr;
extern struct mutex auth_id_lock;
extern spinlock_t sess_idr_lock;

static int iscsi_login_init_conn(struct iscsi_conn *conn)
{
	INIT_LIST_HEAD(&conn->conn_list);
	INIT_LIST_HEAD(&conn->conn_cmd_list);
	INIT_LIST_HEAD(&conn->immed_queue_list);
	INIT_LIST_HEAD(&conn->response_queue_list);
	init_completion(&conn->conn_post_wait_comp);
	init_completion(&conn->conn_wait_comp);
	init_completion(&conn->conn_wait_rcfr_comp);
	init_completion(&conn->conn_waiting_on_uc_comp);
	init_completion(&conn->conn_logout_comp);
	init_completion(&conn->rx_half_close_comp);
	init_completion(&conn->tx_half_close_comp);
	spin_lock_init(&conn->cmd_lock);
	spin_lock_init(&conn->conn_usage_lock);
	spin_lock_init(&conn->immed_queue_lock);
	spin_lock_init(&conn->nopin_timer_lock);
	spin_lock_init(&conn->response_queue_lock);
	spin_lock_init(&conn->state_lock);

	if (!zalloc_cpumask_var(&conn->conn_cpumask, GFP_KERNEL)) {
		pr_err("Unable to allocate conn->conn_cpumask\n");
		return -ENOMEM;
	}

	return 0;
}

/*
 * Used by iscsi_target_nego.c:iscsi_target_locate_portal() to setup
 * per struct iscsi_conn libcrypto contexts for crc32c and crc32-intel
 */
int iscsi_login_setup_crypto(struct iscsi_conn *conn)
{
	/*
	 * Setup slicing by CRC32C algorithm for RX and TX libcrypto contexts
	 * which will default to crc32c_intel.ko for cpu_has_xmm4_2, or fallback
	 * to software 1x8 byte slicing from crc32c.ko
	 */
	conn->conn_rx_hash.flags = 0;
	conn->conn_rx_hash.tfm = crypto_alloc_hash("crc32c", 0,
						CRYPTO_ALG_ASYNC);
	if (IS_ERR(conn->conn_rx_hash.tfm)) {
		pr_err("crypto_alloc_hash() failed for conn_rx_tfm\n");
		return -ENOMEM;
	}

	conn->conn_tx_hash.flags = 0;
	conn->conn_tx_hash.tfm = crypto_alloc_hash("crc32c", 0,
						CRYPTO_ALG_ASYNC);
	if (IS_ERR(conn->conn_tx_hash.tfm)) {
		pr_err("crypto_alloc_hash() failed for conn_tx_tfm\n");
		crypto_free_hash(conn->conn_rx_hash.tfm);
		return -ENOMEM;
	}

	return 0;
}

static int iscsi_login_check_initiator_version(
	struct iscsi_conn *conn,
	u8 version_max,
	u8 version_min)
{
	if ((version_max != 0x00) || (version_min != 0x00)) {
		pr_err("Unsupported iSCSI IETF Pre-RFC Revision,"
			" version Min/Max 0x%02x/0x%02x, rejecting login.\n",
			version_min, version_max);
		iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_INITIATOR_ERR,
				ISCSI_LOGIN_STATUS_NO_VERSION);
		return -1;
	}

	return 0;
}

int iscsi_check_for_session_reinstatement(struct iscsi_conn *conn)
{
	int sessiontype;
	struct iscsi_param *initiatorname_param = NULL, *sessiontype_param = NULL;
	struct iscsi_portal_group *tpg = conn->tpg;
	struct iscsi_session *sess = NULL, *sess_p = NULL;
	struct se_portal_group *se_tpg = &tpg->tpg_se_tpg;
	struct se_session *se_sess, *se_sess_tmp;

	initiatorname_param = iscsi_find_param_from_key(
			INITIATORNAME, conn->param_list);
	if (!initiatorname_param)
		return -1;

	sessiontype_param = iscsi_find_param_from_key(
			SESSIONTYPE, conn->param_list);
	if (!sessiontype_param)
		return -1;

	sessiontype = (strncmp(sessiontype_param->value, NORMAL, 6)) ? 1 : 0;

	spin_lock_bh(&se_tpg->session_lock);
	list_for_each_entry_safe(se_sess, se_sess_tmp, &se_tpg->tpg_sess_list,
			sess_list) {

		sess_p = se_sess->fabric_sess_ptr;
		spin_lock(&sess_p->conn_lock);
		if (atomic_read(&sess_p->session_fall_back_to_erl0) ||
		    atomic_read(&sess_p->session_logout) ||
		    (sess_p->time2retain_timer_flags & ISCSI_TF_EXPIRED)) {
			spin_unlock(&sess_p->conn_lock);
			continue;
		}
		if (!memcmp(sess_p->isid, conn->sess->isid, 6) &&
		   (!strcmp(sess_p->sess_ops->InitiatorName,
			    initiatorname_param->value) &&
		   (sess_p->sess_ops->SessionType == sessiontype))) {
			atomic_set(&sess_p->session_reinstatement, 1);
			spin_unlock(&sess_p->conn_lock);
			iscsit_inc_session_usage_count(sess_p);
			iscsit_stop_time2retain_timer(sess_p);
			sess = sess_p;
			break;
		}
		spin_unlock(&sess_p->conn_lock);
	}
	spin_unlock_bh(&se_tpg->session_lock);
	/*
	 * If the Time2Retain handler has expired, the session is already gone.
	 */
	if (!sess)
		return 0;

	pr_debug("%s iSCSI Session SID %u is still active for %s,"
		" preforming session reinstatement.\n", (sessiontype) ?
		"Discovery" : "Normal", sess->sid,
		sess->sess_ops->InitiatorName);

	spin_lock_bh(&sess->conn_lock);
	if (sess->session_state == TARG_SESS_STATE_FAILED) {
		spin_unlock_bh(&sess->conn_lock);
		iscsit_dec_session_usage_count(sess);
		target_put_session(sess->se_sess);
		return 0;
	}
	spin_unlock_bh(&sess->conn_lock);

	iscsit_stop_session(sess, 1, 1);
	iscsit_dec_session_usage_count(sess);

	target_put_session(sess->se_sess);
	return 0;
}

static void iscsi_login_set_conn_values(
	struct iscsi_session *sess,
	struct iscsi_conn *conn,
	u16 cid)
{
	conn->sess		= sess;
	conn->cid		= cid;
	/*
	 * Generate a random Status sequence number (statsn) for the new
	 * iSCSI connection.
	 */
	get_random_bytes(&conn->stat_sn, sizeof(u32));

	mutex_lock(&auth_id_lock);
	conn->auth_id		= iscsit_global->auth_id++;
	mutex_unlock(&auth_id_lock);
}

/*
 *	This is the leading connection of a new session,
 *	or session reinstatement.
 */
static int iscsi_login_zero_tsih_s1(
	struct iscsi_conn *conn,
	unsigned char *buf)
{
	struct iscsi_session *sess = NULL;
	struct iscsi_login_req *pdu = (struct iscsi_login_req *)buf;

	sess = kzalloc(sizeof(struct iscsi_session), GFP_KERNEL);
	if (!sess) {
		iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_TARGET_ERR,
				ISCSI_LOGIN_STATUS_NO_RESOURCES);
		pr_err("Could not allocate memory for session\n");
		return -ENOMEM;
	}

	iscsi_login_set_conn_values(sess, conn, pdu->cid);
	sess->init_task_tag	= pdu->itt;
	memcpy(&sess->isid, pdu->isid, 6);
	sess->exp_cmd_sn	= pdu->cmdsn;
	INIT_LIST_HEAD(&sess->sess_conn_list);
	INIT_LIST_HEAD(&sess->sess_ooo_cmdsn_list);
	INIT_LIST_HEAD(&sess->cr_active_list);
	INIT_LIST_HEAD(&sess->cr_inactive_list);
	init_completion(&sess->async_msg_comp);
	init_completion(&sess->reinstatement_comp);
	init_completion(&sess->session_wait_comp);
	init_completion(&sess->session_waiting_on_uc_comp);
	mutex_init(&sess->cmdsn_mutex);
	spin_lock_init(&sess->conn_lock);
	spin_lock_init(&sess->cr_a_lock);
	spin_lock_init(&sess->cr_i_lock);
	spin_lock_init(&sess->session_usage_lock);
	spin_lock_init(&sess->ttt_lock);

	if (!idr_pre_get(&sess_idr, GFP_KERNEL)) {
		pr_err("idr_pre_get() for sess_idr failed\n");
		iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_TARGET_ERR,
				ISCSI_LOGIN_STATUS_NO_RESOURCES);
		kfree(sess);
		return -ENOMEM;
	}
	spin_lock(&sess_idr_lock);
	idr_get_new(&sess_idr, NULL, &sess->session_index);
	spin_unlock(&sess_idr_lock);

	sess->creation_time = get_jiffies_64();
	spin_lock_init(&sess->session_stats_lock);
	/*
	 * The FFP CmdSN window values will be allocated from the TPG's
	 * Initiator Node's ACL once the login has been successfully completed.
	 */
	sess->max_cmd_sn	= pdu->cmdsn;

	sess->sess_ops = kzalloc(sizeof(struct iscsi_sess_ops), GFP_KERNEL);
	if (!sess->sess_ops) {
		iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_TARGET_ERR,
				ISCSI_LOGIN_STATUS_NO_RESOURCES);
		pr_err("Unable to allocate memory for"
				" struct iscsi_sess_ops.\n");
		kfree(sess);
		return -ENOMEM;
	}

	sess->se_sess = transport_init_session();
	if (IS_ERR(sess->se_sess)) {
		iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_TARGET_ERR,
				ISCSI_LOGIN_STATUS_NO_RESOURCES);
		kfree(sess);
		return -ENOMEM;
	}

	return 0;
}

static int iscsi_login_zero_tsih_s2(
	struct iscsi_conn *conn)
{
	struct iscsi_node_attrib *na;
	struct iscsi_session *sess = conn->sess;
	unsigned char buf[32];

	sess->tpg = conn->tpg;

	/*
	 * Assign a new TPG Session Handle.  Note this is protected with
	 * struct iscsi_portal_group->np_login_sem from iscsit_access_np().
	 */
	sess->tsih = ++ISCSI_TPG_S(sess)->ntsih;
	if (!sess->tsih)
		sess->tsih = ++ISCSI_TPG_S(sess)->ntsih;

	/*
	 * Create the default params from user defined values..
	 */
	if (iscsi_copy_param_list(&conn->param_list,
				ISCSI_TPG_C(conn)->param_list, 1) < 0) {
		iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_TARGET_ERR,
				ISCSI_LOGIN_STATUS_NO_RESOURCES);
		return -1;
	}

	iscsi_set_keys_to_negotiate(0, conn->param_list);

	if (sess->sess_ops->SessionType)
		return iscsi_set_keys_irrelevant_for_discovery(
				conn->param_list);

	na = iscsit_tpg_get_node_attrib(sess);

	/*
	 * Need to send TargetPortalGroupTag back in first login response
	 * on any iSCSI connection where the Initiator provides TargetName.
	 * See 5.3.1.  Login Phase Start
	 *
	 * In our case, we have already located the struct iscsi_tiqn at this point.
	 */
	memset(buf, 0, 32);
	sprintf(buf, "TargetPortalGroupTag=%hu", ISCSI_TPG_S(sess)->tpgt);
	if (iscsi_change_param_value(buf, conn->param_list, 0) < 0) {
		iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_TARGET_ERR,
				ISCSI_LOGIN_STATUS_NO_RESOURCES);
		return -1;
	}

	/*
	 * Workaround for Initiators that have broken connection recovery logic.
	 *
	 * "We would really like to get rid of this." Linux-iSCSI.org team
	 */
	memset(buf, 0, 32);
	sprintf(buf, "ErrorRecoveryLevel=%d", na->default_erl);
	if (iscsi_change_param_value(buf, conn->param_list, 0) < 0) {
		iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_TARGET_ERR,
				ISCSI_LOGIN_STATUS_NO_RESOURCES);
		return -1;
	}

	if (iscsi_login_disable_FIM_keys(conn->param_list, conn) < 0)
		return -1;

	return 0;
}

/*
 * Remove PSTATE_NEGOTIATE for the four FIM related keys.
 * The Initiator node will be able to enable FIM by proposing them itself.
 */
int iscsi_login_disable_FIM_keys(
	struct iscsi_param_list *param_list,
	struct iscsi_conn *conn)
{
	struct iscsi_param *param;

	param = iscsi_find_param_from_key("OFMarker", param_list);
	if (!param) {
		pr_err("iscsi_find_param_from_key() for"
				" OFMarker failed\n");
		iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_TARGET_ERR,
				ISCSI_LOGIN_STATUS_NO_RESOURCES);
		return -1;
	}
	param->state &= ~PSTATE_NEGOTIATE;

	param = iscsi_find_param_from_key("OFMarkInt", param_list);
	if (!param) {
		pr_err("iscsi_find_param_from_key() for"
				" IFMarker failed\n");
		iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_TARGET_ERR,
				ISCSI_LOGIN_STATUS_NO_RESOURCES);
		return -1;
	}
	param->state &= ~PSTATE_NEGOTIATE;

	param = iscsi_find_param_from_key("IFMarker", param_list);
	if (!param) {
		pr_err("iscsi_find_param_from_key() for"
				" IFMarker failed\n");
		iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_TARGET_ERR,
				ISCSI_LOGIN_STATUS_NO_RESOURCES);
		return -1;
	}
	param->state &= ~PSTATE_NEGOTIATE;

	param = iscsi_find_param_from_key("IFMarkInt", param_list);
	if (!param) {
		pr_err("iscsi_find_param_from_key() for"
				" IFMarker failed\n");
		iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_TARGET_ERR,
				ISCSI_LOGIN_STATUS_NO_RESOURCES);
		return -1;
	}
	param->state &= ~PSTATE_NEGOTIATE;

	return 0;
}

static int iscsi_login_non_zero_tsih_s1(
	struct iscsi_conn *conn,
	unsigned char *buf)
{
	struct iscsi_login_req *pdu = (struct iscsi_login_req *)buf;

	iscsi_login_set_conn_values(NULL, conn, pdu->cid);
	return 0;
}

/*
 *	Add a new connection to an existing session.
 */
static int iscsi_login_non_zero_tsih_s2(
	struct iscsi_conn *conn,
	unsigned char *buf)
{
	struct iscsi_portal_group *tpg = conn->tpg;
	struct iscsi_session *sess = NULL, *sess_p = NULL;
	struct se_portal_group *se_tpg = &tpg->tpg_se_tpg;
	struct se_session *se_sess, *se_sess_tmp;
	struct iscsi_login_req *pdu = (struct iscsi_login_req *)buf;

	spin_lock_bh(&se_tpg->session_lock);
	list_for_each_entry_safe(se_sess, se_sess_tmp, &se_tpg->tpg_sess_list,
			sess_list) {

		sess_p = (struct iscsi_session *)se_sess->fabric_sess_ptr;
		if (atomic_read(&sess_p->session_fall_back_to_erl0) ||
		    atomic_read(&sess_p->session_logout) ||
		   (sess_p->time2retain_timer_flags & ISCSI_TF_EXPIRED))
			continue;
		if (!memcmp(sess_p->isid, pdu->isid, 6) &&
		     (sess_p->tsih == pdu->tsih)) {
			iscsit_inc_session_usage_count(sess_p);
			iscsit_stop_time2retain_timer(sess_p);
			sess = sess_p;
			break;
		}
	}
	spin_unlock_bh(&se_tpg->session_lock);

	/*
	 * If the Time2Retain handler has expired, the session is already gone.
	 */
	if (!sess) {
		pr_err("Initiator attempting to add a connection to"
			" a non-existent session, rejecting iSCSI Login.\n");
		iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_INITIATOR_ERR,
				ISCSI_LOGIN_STATUS_NO_SESSION);
		return -1;
	}

	/*
	 * Stop the Time2Retain timer if this is a failed session, we restart
	 * the timer if the login is not successful.
	 */
	spin_lock_bh(&sess->conn_lock);
	if (sess->session_state == TARG_SESS_STATE_FAILED)
		atomic_set(&sess->session_continuation, 1);
	spin_unlock_bh(&sess->conn_lock);

	iscsi_login_set_conn_values(sess, conn, pdu->cid);

	if (iscsi_copy_param_list(&conn->param_list,
			ISCSI_TPG_C(conn)->param_list, 0) < 0) {
		iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_TARGET_ERR,
				ISCSI_LOGIN_STATUS_NO_RESOURCES);
		return -1;
	}

	iscsi_set_keys_to_negotiate(0, conn->param_list);
	/*
	 * Need to send TargetPortalGroupTag back in first login response
	 * on any iSCSI connection where the Initiator provides TargetName.
	 * See 5.3.1.  Login Phase Start
	 *
	 * In our case, we have already located the struct iscsi_tiqn at this point.
	 */
	memset(buf, 0, 32);
	sprintf(buf, "TargetPortalGroupTag=%hu", ISCSI_TPG_S(sess)->tpgt);
	if (iscsi_change_param_value(buf, conn->param_list, 0) < 0) {
		iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_TARGET_ERR,
				ISCSI_LOGIN_STATUS_NO_RESOURCES);
		return -1;
	}

	return iscsi_login_disable_FIM_keys(conn->param_list, conn);
}

int iscsi_login_post_auth_non_zero_tsih(
	struct iscsi_conn *conn,
	u16 cid,
	u32 exp_statsn)
{
	struct iscsi_conn *conn_ptr = NULL;
	struct iscsi_conn_recovery *cr = NULL;
	struct iscsi_session *sess = conn->sess;

	/*
	 * By following item 5 in the login table,  if we have found
	 * an existing ISID and a valid/existing TSIH and an existing
	 * CID we do connection reinstatement.  Currently we dont not
	 * support it so we send back an non-zero status class to the
	 * initiator and release the new connection.
	 */
	conn_ptr = iscsit_get_conn_from_cid_rcfr(sess, cid);
	if (conn_ptr) {
		pr_err("Connection exists with CID %hu for %s,"
			" performing connection reinstatement.\n",
			conn_ptr->cid, sess->sess_ops->InitiatorName);

		iscsit_connection_reinstatement_rcfr(conn_ptr);
		iscsit_dec_conn_usage_count(conn_ptr);
	}

	/*
	 * Check for any connection recovery entires containing CID.
	 * We use the original ExpStatSN sent in the first login request
	 * to acknowledge commands for the failed connection.
	 *
	 * Also note that an explict logout may have already been sent,
	 * but the response may not be sent due to additional connection
	 * loss.
	 */
	if (sess->sess_ops->ErrorRecoveryLevel == 2) {
		cr = iscsit_get_inactive_connection_recovery_entry(
				sess, cid);
		if (cr) {
			pr_debug("Performing implicit logout"
				" for connection recovery on CID: %hu\n",
					conn->cid);
			iscsit_discard_cr_cmds_by_expstatsn(cr, exp_statsn);
		}
	}

	/*
	 * Else we follow item 4 from the login table in that we have
	 * found an existing ISID and a valid/existing TSIH and a new
	 * CID we go ahead and continue to add a new connection to the
	 * session.
	 */
	pr_debug("Adding CID %hu to existing session for %s.\n",
			cid, sess->sess_ops->InitiatorName);

	if ((atomic_read(&sess->nconn) + 1) > sess->sess_ops->MaxConnections) {
		pr_err("Adding additional connection to this session"
			" would exceed MaxConnections %d, login failed.\n",
				sess->sess_ops->MaxConnections);
		iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_INITIATOR_ERR,
				ISCSI_LOGIN_STATUS_ISID_ERROR);
		return -1;
	}

	return 0;
}

static void iscsi_post_login_start_timers(struct iscsi_conn *conn)
{
	struct iscsi_session *sess = conn->sess;

	if (!sess->sess_ops->SessionType)
		iscsit_start_nopin_timer(conn);
}

static int iscsi_post_login_handler(
	struct iscsi_np *np,
	struct iscsi_conn *conn,
	u8 zero_tsih)
{
	int stop_timer = 0;
	struct iscsi_session *sess = conn->sess;
	struct se_session *se_sess = sess->se_sess;
	struct iscsi_portal_group *tpg = ISCSI_TPG_S(sess);
	struct se_portal_group *se_tpg = &tpg->tpg_se_tpg;
	struct iscsi_thread_set *ts;

	iscsit_inc_conn_usage_count(conn);

	iscsit_collect_login_stats(conn, ISCSI_STATUS_CLS_SUCCESS,
			ISCSI_LOGIN_STATUS_ACCEPT);

	pr_debug("Moving to TARG_CONN_STATE_LOGGED_IN.\n");
	conn->conn_state = TARG_CONN_STATE_LOGGED_IN;

	iscsi_set_connection_parameters(conn->conn_ops, conn->param_list);
	iscsit_set_sync_and_steering_values(conn);
	/*
	 * SCSI Initiator -> SCSI Target Port Mapping
	 */
	ts = iscsi_get_thread_set();
	if (!zero_tsih) {
		iscsi_set_session_parameters(sess->sess_ops,
				conn->param_list, 0);
		iscsi_release_param_list(conn->param_list);
		conn->param_list = NULL;

		spin_lock_bh(&sess->conn_lock);
		atomic_set(&sess->session_continuation, 0);
		if (sess->session_state == TARG_SESS_STATE_FAILED) {
			pr_debug("Moving to"
					" TARG_SESS_STATE_LOGGED_IN.\n");
			sess->session_state = TARG_SESS_STATE_LOGGED_IN;
			stop_timer = 1;
		}

		pr_debug("iSCSI Login successful on CID: %hu from %s to"
			" %s:%hu,%hu\n", conn->cid, conn->login_ip,
			conn->local_ip, conn->local_port, tpg->tpgt);

		list_add_tail(&conn->conn_list, &sess->sess_conn_list);
		atomic_inc(&sess->nconn);
		pr_debug("Incremented iSCSI Connection count to %hu"
			" from node: %s\n", atomic_read(&sess->nconn),
			sess->sess_ops->InitiatorName);
		spin_unlock_bh(&sess->conn_lock);

		iscsi_post_login_start_timers(conn);
		iscsi_activate_thread_set(conn, ts);
		/*
		 * Determine CPU mask to ensure connection's RX and TX kthreads
		 * are scheduled on the same CPU.
		 */
		iscsit_thread_get_cpumask(conn);
		conn->conn_rx_reset_cpumask = 1;
		conn->conn_tx_reset_cpumask = 1;

		iscsit_dec_conn_usage_count(conn);
		if (stop_timer) {
			spin_lock_bh(&se_tpg->session_lock);
			iscsit_stop_time2retain_timer(sess);
			spin_unlock_bh(&se_tpg->session_lock);
		}
		iscsit_dec_session_usage_count(sess);
		return 0;
	}

	iscsi_set_session_parameters(sess->sess_ops, conn->param_list, 1);
	iscsi_release_param_list(conn->param_list);
	conn->param_list = NULL;

	iscsit_determine_maxcmdsn(sess);

	spin_lock_bh(&se_tpg->session_lock);
	__transport_register_session(&sess->tpg->tpg_se_tpg,
			se_sess->se_node_acl, se_sess, sess);
	pr_debug("Moving to TARG_SESS_STATE_LOGGED_IN.\n");
	sess->session_state = TARG_SESS_STATE_LOGGED_IN;

	pr_debug("iSCSI Login successful on CID: %hu from %s to %s:%hu,%hu\n",
		conn->cid, conn->login_ip, conn->local_ip, conn->local_port,
		tpg->tpgt);

	spin_lock_bh(&sess->conn_lock);
	list_add_tail(&conn->conn_list, &sess->sess_conn_list);
	atomic_inc(&sess->nconn);
	pr_debug("Incremented iSCSI Connection count to %hu from node:"
		" %s\n", atomic_read(&sess->nconn),
		sess->sess_ops->InitiatorName);
	spin_unlock_bh(&sess->conn_lock);

	sess->sid = tpg->sid++;
	if (!sess->sid)
		sess->sid = tpg->sid++;
	pr_debug("Established iSCSI session from node: %s\n",
			sess->sess_ops->InitiatorName);

	tpg->nsessions++;
	if (tpg->tpg_tiqn)
		tpg->tpg_tiqn->tiqn_nsessions++;

	pr_debug("Incremented number of active iSCSI sessions to %u on"
		" iSCSI Target Portal Group: %hu\n", tpg->nsessions, tpg->tpgt);
	spin_unlock_bh(&se_tpg->session_lock);

	iscsi_post_login_start_timers(conn);
	iscsi_activate_thread_set(conn, ts);
	/*
	 * Determine CPU mask to ensure connection's RX and TX kthreads
	 * are scheduled on the same CPU.
	 */
	iscsit_thread_get_cpumask(conn);
	conn->conn_rx_reset_cpumask = 1;
	conn->conn_tx_reset_cpumask = 1;

	iscsit_dec_conn_usage_count(conn);

	return 0;
}

static void iscsi_handle_login_thread_timeout(unsigned long data)
{
	struct iscsi_np *np = (struct iscsi_np *) data;

	spin_lock_bh(&np->np_thread_lock);
	pr_err("iSCSI Login timeout on Network Portal %s:%hu\n",
			np->np_ip, np->np_port);

	if (np->np_login_timer_flags & ISCSI_TF_STOP) {
		spin_unlock_bh(&np->np_thread_lock);
		return;
	}

	if (np->np_thread)
		send_sig(SIGINT, np->np_thread, 1);

	np->np_login_timer_flags &= ~ISCSI_TF_RUNNING;
	spin_unlock_bh(&np->np_thread_lock);
}

static void iscsi_start_login_thread_timer(struct iscsi_np *np)
{
	/*
	 * This used the TA_LOGIN_TIMEOUT constant because at this
	 * point we do not have access to ISCSI_TPG_ATTRIB(tpg)->login_timeout
	 */
	spin_lock_bh(&np->np_thread_lock);
	init_timer(&np->np_login_timer);
	np->np_login_timer.expires = (get_jiffies_64() + TA_LOGIN_TIMEOUT * HZ);
	np->np_login_timer.data = (unsigned long)np;
	np->np_login_timer.function = iscsi_handle_login_thread_timeout;
	np->np_login_timer_flags &= ~ISCSI_TF_STOP;
	np->np_login_timer_flags |= ISCSI_TF_RUNNING;
	add_timer(&np->np_login_timer);

	pr_debug("Added timeout timer to iSCSI login request for"
			" %u seconds.\n", TA_LOGIN_TIMEOUT);
	spin_unlock_bh(&np->np_thread_lock);
}

static void iscsi_stop_login_thread_timer(struct iscsi_np *np)
{
	spin_lock_bh(&np->np_thread_lock);
	if (!(np->np_login_timer_flags & ISCSI_TF_RUNNING)) {
		spin_unlock_bh(&np->np_thread_lock);
		return;
	}
	np->np_login_timer_flags |= ISCSI_TF_STOP;
	spin_unlock_bh(&np->np_thread_lock);

	del_timer_sync(&np->np_login_timer);

	spin_lock_bh(&np->np_thread_lock);
	np->np_login_timer_flags &= ~ISCSI_TF_RUNNING;
	spin_unlock_bh(&np->np_thread_lock);
}

int iscsi_target_setup_login_socket(
	struct iscsi_np *np,
	struct __kernel_sockaddr_storage *sockaddr)
{
	struct socket *sock;
	int backlog = 5, ret, opt = 0, len;

	switch (np->np_network_transport) {
	case ISCSI_TCP:
		np->np_ip_proto = IPPROTO_TCP;
		np->np_sock_type = SOCK_STREAM;
		break;
	case ISCSI_SCTP_TCP:
		np->np_ip_proto = IPPROTO_SCTP;
		np->np_sock_type = SOCK_STREAM;
		break;
	case ISCSI_SCTP_UDP:
		np->np_ip_proto = IPPROTO_SCTP;
		np->np_sock_type = SOCK_SEQPACKET;
		break;
	case ISCSI_IWARP_TCP:
	case ISCSI_IWARP_SCTP:
	case ISCSI_INFINIBAND:
	default:
		pr_err("Unsupported network_transport: %d\n",
				np->np_network_transport);
		return -EINVAL;
	}

	ret = sock_create(sockaddr->ss_family, np->np_sock_type,
			np->np_ip_proto, &sock);
	if (ret < 0) {
		pr_err("sock_create() failed.\n");
		return ret;
	}
	np->np_socket = sock;
	/*
	 * Setup the np->np_sockaddr from the passed sockaddr setup
	 * in iscsi_target_configfs.c code..
	 */
	memcpy(&np->np_sockaddr, sockaddr,
			sizeof(struct __kernel_sockaddr_storage));

	if (sockaddr->ss_family == AF_INET6)
		len = sizeof(struct sockaddr_in6);
	else
		len = sizeof(struct sockaddr_in);
	/*
	 * Set SO_REUSEADDR, and disable Nagel Algorithm with TCP_NODELAY.
	 */
	/* FIXME: Someone please explain why this is endian-safe */
	opt = 1;
	if (np->np_network_transport == ISCSI_TCP) {
		ret = kernel_setsockopt(sock, IPPROTO_TCP, TCP_NODELAY,
				(char *)&opt, sizeof(opt));
		if (ret < 0) {
			pr_err("kernel_setsockopt() for TCP_NODELAY"
				" failed: %d\n", ret);
			goto fail;
		}
	}

	/* FIXME: Someone please explain why this is endian-safe */
	ret = kernel_setsockopt(sock, SOL_SOCKET, SO_REUSEADDR,
			(char *)&opt, sizeof(opt));
	if (ret < 0) {
		pr_err("kernel_setsockopt() for SO_REUSEADDR"
			" failed\n");
		goto fail;
	}

	ret = kernel_setsockopt(sock, IPPROTO_IP, IP_FREEBIND,
			(char *)&opt, sizeof(opt));
	if (ret < 0) {
		pr_err("kernel_setsockopt() for IP_FREEBIND"
			" failed\n");
		goto fail;
	}

	ret = kernel_bind(sock, (struct sockaddr *)&np->np_sockaddr, len);
	if (ret < 0) {
		pr_err("kernel_bind() failed: %d\n", ret);
		goto fail;
	}

	ret = kernel_listen(sock, backlog);
	if (ret != 0) {
		pr_err("kernel_listen() failed: %d\n", ret);
		goto fail;
	}

	return 0;

fail:
	np->np_socket = NULL;
	if (sock)
		sock_release(sock);
	return ret;
}

static int __iscsi_target_login_thread(struct iscsi_np *np)
{
	u8 buffer[ISCSI_HDR_LEN], iscsi_opcode, zero_tsih = 0;
	int err, ret = 0, stop;
	struct iscsi_conn *conn = NULL;
	struct iscsi_login *login;
	struct iscsi_portal_group *tpg = NULL;
	struct socket *new_sock, *sock;
	struct kvec iov;
	struct iscsi_login_req *pdu;
	struct sockaddr_in sock_in;
	struct sockaddr_in6 sock_in6;

	flush_signals(current);
	sock = np->np_socket;

	spin_lock_bh(&np->np_thread_lock);
	if (np->np_thread_state == ISCSI_NP_THREAD_RESET) {
		np->np_thread_state = ISCSI_NP_THREAD_ACTIVE;
		complete(&np->np_restart_comp);
	} else {
		np->np_thread_state = ISCSI_NP_THREAD_ACTIVE;
	}
	spin_unlock_bh(&np->np_thread_lock);

	if (kernel_accept(sock, &new_sock, 0) < 0) {
		spin_lock_bh(&np->np_thread_lock);
		if (np->np_thread_state == ISCSI_NP_THREAD_RESET) {
			spin_unlock_bh(&np->np_thread_lock);
			complete(&np->np_restart_comp);
			/* Get another socket */
			return 1;
		}
		spin_unlock_bh(&np->np_thread_lock);
		goto out;
	}
	iscsi_start_login_thread_timer(np);

	conn = kzalloc(sizeof(struct iscsi_conn), GFP_KERNEL);
	if (!conn) {
		pr_err("Could not allocate memory for"
			" new connection\n");
		sock_release(new_sock);
		/* Get another socket */
		return 1;
	}

	pr_debug("Moving to TARG_CONN_STATE_FREE.\n");
	conn->conn_state = TARG_CONN_STATE_FREE;
	conn->sock = new_sock;

	pr_debug("Moving to TARG_CONN_STATE_XPT_UP.\n");
	conn->conn_state = TARG_CONN_STATE_XPT_UP;

	/*
	 * Allocate conn->conn_ops early as a failure calling
	 * iscsit_tx_login_rsp() below will call tx_data().
	 */
	conn->conn_ops = kzalloc(sizeof(struct iscsi_conn_ops), GFP_KERNEL);
	if (!conn->conn_ops) {
		pr_err("Unable to allocate memory for"
			" struct iscsi_conn_ops.\n");
		goto new_sess_out;
	}
	/*
	 * Perform the remaining iSCSI connection initialization items..
	 */
	if (iscsi_login_init_conn(conn) < 0)
		goto new_sess_out;

	memset(buffer, 0, ISCSI_HDR_LEN);
	memset(&iov, 0, sizeof(struct kvec));
	iov.iov_base	= buffer;
	iov.iov_len	= ISCSI_HDR_LEN;

	if (rx_data(conn, &iov, 1, ISCSI_HDR_LEN) <= 0) {
		pr_err("rx_data() returned an error.\n");
		goto new_sess_out;
	}

	iscsi_opcode = (buffer[0] & ISCSI_OPCODE_MASK);
	if (!(iscsi_opcode & ISCSI_OP_LOGIN)) {
		pr_err("First opcode is not login request,"
			" failing login request.\n");
		goto new_sess_out;
	}

	pdu			= (struct iscsi_login_req *) buffer;
	pdu->cid		= be16_to_cpu(pdu->cid);
	pdu->tsih		= be16_to_cpu(pdu->tsih);
	pdu->itt		= be32_to_cpu(pdu->itt);
	pdu->cmdsn		= be32_to_cpu(pdu->cmdsn);
	pdu->exp_statsn		= be32_to_cpu(pdu->exp_statsn);
	/*
	 * Used by iscsit_tx_login_rsp() for Login Resonses PDUs
	 * when Status-Class != 0.
	*/
	conn->login_itt		= pdu->itt;

	spin_lock_bh(&np->np_thread_lock);
	if (np->np_thread_state != ISCSI_NP_THREAD_ACTIVE) {
		spin_unlock_bh(&np->np_thread_lock);
		pr_err("iSCSI Network Portal on %s:%hu currently not"
			" active.\n", np->np_ip, np->np_port);
		iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_TARGET_ERR,
				ISCSI_LOGIN_STATUS_SVC_UNAVAILABLE);
		goto new_sess_out;
	}
	spin_unlock_bh(&np->np_thread_lock);

	if (np->np_sockaddr.ss_family == AF_INET6) {
		memset(&sock_in6, 0, sizeof(struct sockaddr_in6));

		if (conn->sock->ops->getname(conn->sock,
				(struct sockaddr *)&sock_in6, &err, 1) < 0) {
			pr_err("sock_ops->getname() failed.\n");
			iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_TARGET_ERR,
					ISCSI_LOGIN_STATUS_TARGET_ERROR);
			goto new_sess_out;
		}
		snprintf(conn->login_ip, sizeof(conn->login_ip), "%pI6c",
				&sock_in6.sin6_addr.in6_u);
		conn->login_port = ntohs(sock_in6.sin6_port);

		if (conn->sock->ops->getname(conn->sock,
				(struct sockaddr *)&sock_in6, &err, 0) < 0) {
			pr_err("sock_ops->getname() failed.\n");
			iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_TARGET_ERR,
					ISCSI_LOGIN_STATUS_TARGET_ERROR);
			goto new_sess_out;
		}
		snprintf(conn->local_ip, sizeof(conn->local_ip), "%pI6c",
				&sock_in6.sin6_addr.in6_u);
		conn->local_port = ntohs(sock_in6.sin6_port);

	} else {
		memset(&sock_in, 0, sizeof(struct sockaddr_in));

		if (conn->sock->ops->getname(conn->sock,
				(struct sockaddr *)&sock_in, &err, 1) < 0) {
			pr_err("sock_ops->getname() failed.\n");
			iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_TARGET_ERR,
					ISCSI_LOGIN_STATUS_TARGET_ERROR);
			goto new_sess_out;
		}
		sprintf(conn->login_ip, "%pI4", &sock_in.sin_addr.s_addr);
		conn->login_port = ntohs(sock_in.sin_port);

		if (conn->sock->ops->getname(conn->sock,
				(struct sockaddr *)&sock_in, &err, 0) < 0) {
			pr_err("sock_ops->getname() failed.\n");
			iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_TARGET_ERR,
					ISCSI_LOGIN_STATUS_TARGET_ERROR);
			goto new_sess_out;
		}
		sprintf(conn->local_ip, "%pI4", &sock_in.sin_addr.s_addr);
		conn->local_port = ntohs(sock_in.sin_port);
	}

	conn->network_transport = np->np_network_transport;

	pr_debug("Received iSCSI login request from %s on %s Network"
			" Portal %s:%hu\n", conn->login_ip,
		(conn->network_transport == ISCSI_TCP) ? "TCP" : "SCTP",
			conn->local_ip, conn->local_port);

	pr_debug("Moving to TARG_CONN_STATE_IN_LOGIN.\n");
	conn->conn_state	= TARG_CONN_STATE_IN_LOGIN;

	if (iscsi_login_check_initiator_version(conn, pdu->max_version,
			pdu->min_version) < 0)
		goto new_sess_out;

	zero_tsih = (pdu->tsih == 0x0000);
	if (zero_tsih) {
		/*
		 * This is the leading connection of a new session.
		 * We wait until after authentication to check for
		 * session reinstatement.
		 */
		if (iscsi_login_zero_tsih_s1(conn, buffer) < 0)
			goto new_sess_out;
	} else {
		/*
		 * Add a new connection to an existing session.
		 * We check for a non-existant session in
		 * iscsi_login_non_zero_tsih_s2() below based
		 * on ISID/TSIH, but wait until after authentication
		 * to check for connection reinstatement, etc.
		 */
		if (iscsi_login_non_zero_tsih_s1(conn, buffer) < 0)
			goto new_sess_out;
	}

	/*
	 * This will process the first login request, and call
	 * iscsi_target_locate_portal(), and return a valid struct iscsi_login.
	 */
	login = iscsi_target_init_negotiation(np, conn, buffer);
	if (!login) {
		tpg = conn->tpg;
		goto new_sess_out;
	}

	tpg = conn->tpg;
	if (!tpg) {
		pr_err("Unable to locate struct iscsi_conn->tpg\n");
		goto new_sess_out;
	}

	if (zero_tsih) {
		if (iscsi_login_zero_tsih_s2(conn) < 0) {
			iscsi_target_nego_release(login, conn);
			goto new_sess_out;
		}
	} else {
		if (iscsi_login_non_zero_tsih_s2(conn, buffer) < 0) {
			iscsi_target_nego_release(login, conn);
			goto old_sess_out;
		}
	}

	if (iscsi_target_start_negotiation(login, conn) < 0)
		goto new_sess_out;

	if (!conn->sess) {
		pr_err("struct iscsi_conn session pointer is NULL!\n");
		goto new_sess_out;
	}

	iscsi_stop_login_thread_timer(np);

	if (signal_pending(current))
		goto new_sess_out;

	ret = iscsi_post_login_handler(np, conn, zero_tsih);

	if (ret < 0)
		goto new_sess_out;

	iscsit_deaccess_np(np, tpg);
	tpg = NULL;
	/* Get another socket */
	return 1;

new_sess_out:
	pr_err("iSCSI Login negotiation failed.\n");
	iscsit_collect_login_stats(conn, ISCSI_STATUS_CLS_INITIATOR_ERR,
				  ISCSI_LOGIN_STATUS_INIT_ERR);
	if (!zero_tsih || !conn->sess)
		goto old_sess_out;
	if (conn->sess->se_sess)
		transport_free_session(conn->sess->se_sess);
	if (conn->sess->session_index != 0) {
		spin_lock_bh(&sess_idr_lock);
		idr_remove(&sess_idr, conn->sess->session_index);
		spin_unlock_bh(&sess_idr_lock);
	}
	if (conn->sess->sess_ops)
		kfree(conn->sess->sess_ops);
	if (conn->sess)
		kfree(conn->sess);
old_sess_out:
	iscsi_stop_login_thread_timer(np);
	/*
	 * If login negotiation fails check if the Time2Retain timer
	 * needs to be restarted.
	 */
	if (!zero_tsih && conn->sess) {
		spin_lock_bh(&conn->sess->conn_lock);
		if (conn->sess->session_state == TARG_SESS_STATE_FAILED) {
			struct se_portal_group *se_tpg =
					&ISCSI_TPG_C(conn)->tpg_se_tpg;

			atomic_set(&conn->sess->session_continuation, 0);
			spin_unlock_bh(&conn->sess->conn_lock);
			spin_lock_bh(&se_tpg->session_lock);
			iscsit_start_time2retain_handler(conn->sess);
			spin_unlock_bh(&se_tpg->session_lock);
		} else
			spin_unlock_bh(&conn->sess->conn_lock);
		iscsit_dec_session_usage_count(conn->sess);
	}

	if (!IS_ERR(conn->conn_rx_hash.tfm))
		crypto_free_hash(conn->conn_rx_hash.tfm);
	if (!IS_ERR(conn->conn_tx_hash.tfm))
		crypto_free_hash(conn->conn_tx_hash.tfm);

	if (conn->conn_cpumask)
		free_cpumask_var(conn->conn_cpumask);

	kfree(conn->conn_ops);

	if (conn->param_list) {
		iscsi_release_param_list(conn->param_list);
		conn->param_list = NULL;
	}
	if (conn->sock)
		sock_release(conn->sock);
	kfree(conn);

	if (tpg) {
		iscsit_deaccess_np(np, tpg);
		tpg = NULL;
	}

out:
	stop = kthread_should_stop();
	if (!stop && signal_pending(current)) {
		spin_lock_bh(&np->np_thread_lock);
		stop = (np->np_thread_state == ISCSI_NP_THREAD_SHUTDOWN);
		spin_unlock_bh(&np->np_thread_lock);
	}
	/* Wait for another socket.. */
	if (!stop)
		return 1;

	iscsi_stop_login_thread_timer(np);
	spin_lock_bh(&np->np_thread_lock);
	np->np_thread_state = ISCSI_NP_THREAD_EXIT;
	spin_unlock_bh(&np->np_thread_lock);
	return 0;
}

int iscsi_target_login_thread(void *arg)
{
	struct iscsi_np *np = arg;
	int ret;

	allow_signal(SIGINT);

	while (!kthread_should_stop()) {
		ret = __iscsi_target_login_thread(np);
		/*
		 * We break and exit here unless another sock_accept() call
		 * is expected.
		 */
		if (ret != 1)
			break;
	}

	return 0;
}