summaryrefslogtreecommitdiffstats
path: root/drivers/target/target_core_fabric_configfs.c
blob: 32b148d7e261e3c7e361033ec32f526c2a2c4f07 (plain)
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
/*******************************************************************************
* Filename: target_core_fabric_configfs.c
 *
 * This file contains generic fabric module configfs infrastructure for
 * TCM v4.x code
 *
 * Copyright (c) 2010 Rising Tide Systems
 * Copyright (c) 2010 Linux-iSCSI.org
 *
 * Copyright (c) 2010 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/module.h>
#include <linux/moduleparam.h>
#include <linux/version.h>
#include <generated/utsrelease.h>
#include <linux/utsname.h>
#include <linux/init.h>
#include <linux/fs.h>
#include <linux/namei.h>
#include <linux/slab.h>
#include <linux/types.h>
#include <linux/delay.h>
#include <linux/unistd.h>
#include <linux/string.h>
#include <linux/syscalls.h>
#include <linux/configfs.h>

#include <target/target_core_base.h>
#include <target/target_core_device.h>
#include <target/target_core_tpg.h>
#include <target/target_core_transport.h>
#include <target/target_core_fabric_ops.h>
#include <target/target_core_fabric_configfs.h>
#include <target/target_core_configfs.h>
#include <target/configfs_macros.h>

#include "target_core_alua.h"
#include "target_core_hba.h"
#include "target_core_pr.h"

#define TF_CIT_SETUP(_name, _item_ops, _group_ops, _attrs)		\
static void target_fabric_setup_##_name##_cit(struct target_fabric_configfs *tf) \
{									\
	struct target_fabric_configfs_template *tfc = &tf->tf_cit_tmpl;	\
	struct config_item_type *cit = &tfc->tfc_##_name##_cit;		\
									\
	cit->ct_item_ops = _item_ops;					\
	cit->ct_group_ops = _group_ops;					\
	cit->ct_attrs = _attrs;						\
	cit->ct_owner = tf->tf_module;					\
	printk("Setup generic %s\n", __stringify(_name));		\
}

/* Start of tfc_tpg_mappedlun_cit */

static int target_fabric_mappedlun_link(
	struct config_item *lun_acl_ci,
	struct config_item *lun_ci)
{
	struct se_dev_entry *deve;
	struct se_lun *lun = container_of(to_config_group(lun_ci),
			struct se_lun, lun_group);
	struct se_lun_acl *lacl = container_of(to_config_group(lun_acl_ci),
			struct se_lun_acl, se_lun_group);
	struct se_portal_group *se_tpg;
	struct config_item *nacl_ci, *tpg_ci, *tpg_ci_s, *wwn_ci, *wwn_ci_s;
	int ret = 0, lun_access;
	/*
	 * Ensure that the source port exists
	 */
	if (!(lun->lun_sep) || !(lun->lun_sep->sep_tpg)) {
		printk(KERN_ERR "Source se_lun->lun_sep or lun->lun_sep->sep"
				"_tpg does not exist\n");
		return -EINVAL;
	}
	se_tpg = lun->lun_sep->sep_tpg;

	nacl_ci = &lun_acl_ci->ci_parent->ci_group->cg_item;
	tpg_ci = &nacl_ci->ci_group->cg_item;
	wwn_ci = &tpg_ci->ci_group->cg_item;
	tpg_ci_s = &lun_ci->ci_parent->ci_group->cg_item;
	wwn_ci_s = &tpg_ci_s->ci_group->cg_item;
	/*
	 * Make sure the SymLink is going to the same $FABRIC/$WWN/tpgt_$TPGT
	 */
	if (strcmp(config_item_name(wwn_ci), config_item_name(wwn_ci_s))) {
		printk(KERN_ERR "Illegal Initiator ACL SymLink outside of %s\n",
			config_item_name(wwn_ci));
		return -EINVAL;
	}
	if (strcmp(config_item_name(tpg_ci), config_item_name(tpg_ci_s))) {
		printk(KERN_ERR "Illegal Initiator ACL Symlink outside of %s"
			" TPGT: %s\n", config_item_name(wwn_ci),
			config_item_name(tpg_ci));
		return -EINVAL;
	}
	/*
	 * If this struct se_node_acl was dynamically generated with
	 * tpg_1/attrib/generate_node_acls=1, use the existing deve->lun_flags,
	 * which be will write protected (READ-ONLY) when
	 * tpg_1/attrib/demo_mode_write_protect=1
	 */
	spin_lock_irq(&lacl->se_lun_nacl->device_list_lock);
	deve = &lacl->se_lun_nacl->device_list[lacl->mapped_lun];
	if (deve->lun_flags & TRANSPORT_LUNFLAGS_INITIATOR_ACCESS)
		lun_access = deve->lun_flags;
	else
		lun_access =
			(TPG_TFO(se_tpg)->tpg_check_prod_mode_write_protect(
				se_tpg)) ? TRANSPORT_LUNFLAGS_READ_ONLY :
					   TRANSPORT_LUNFLAGS_READ_WRITE;
	spin_unlock_irq(&lacl->se_lun_nacl->device_list_lock);
	/*
	 * Determine the actual mapped LUN value user wants..
	 *
	 * This value is what the SCSI Initiator actually sees the
	 * iscsi/$IQN/$TPGT/lun/lun_* as on their SCSI Initiator Ports.
	 */
	ret = core_dev_add_initiator_node_lun_acl(se_tpg, lacl,
			lun->unpacked_lun, lun_access);

	return (ret < 0) ? -EINVAL : 0;
}

static int target_fabric_mappedlun_unlink(
	struct config_item *lun_acl_ci,
	struct config_item *lun_ci)
{
	struct se_lun *lun;
	struct se_lun_acl *lacl = container_of(to_config_group(lun_acl_ci),
			struct se_lun_acl, se_lun_group);
	struct se_node_acl *nacl = lacl->se_lun_nacl;
	struct se_dev_entry *deve = &nacl->device_list[lacl->mapped_lun];
	struct se_portal_group *se_tpg;
	/*
	 * Determine if the underlying MappedLUN has already been released..
	 */
	if (!(deve->se_lun))
		return 0;

	lun = container_of(to_config_group(lun_ci), struct se_lun, lun_group);
	se_tpg = lun->lun_sep->sep_tpg;

	core_dev_del_initiator_node_lun_acl(se_tpg, lun, lacl);
	return 0;
}

CONFIGFS_EATTR_STRUCT(target_fabric_mappedlun, se_lun_acl);
#define TCM_MAPPEDLUN_ATTR(_name, _mode)				\
static struct target_fabric_mappedlun_attribute target_fabric_mappedlun_##_name = \
	__CONFIGFS_EATTR(_name, _mode,					\
	target_fabric_mappedlun_show_##_name,				\
	target_fabric_mappedlun_store_##_name);

static ssize_t target_fabric_mappedlun_show_write_protect(
	struct se_lun_acl *lacl,
	char *page)
{
	struct se_node_acl *se_nacl = lacl->se_lun_nacl;
	struct se_dev_entry *deve;
	ssize_t len;

	spin_lock_irq(&se_nacl->device_list_lock);
	deve = &se_nacl->device_list[lacl->mapped_lun];
	len = sprintf(page, "%d\n",
			(deve->lun_flags & TRANSPORT_LUNFLAGS_READ_ONLY) ?
			1 : 0);
	spin_unlock_irq(&se_nacl->device_list_lock);

	return len;
}

static ssize_t target_fabric_mappedlun_store_write_protect(
	struct se_lun_acl *lacl,
	const char *page,
	size_t count)
{
	struct se_node_acl *se_nacl = lacl->se_lun_nacl;
	struct se_portal_group *se_tpg = se_nacl->se_tpg;
	unsigned long op;

	if (strict_strtoul(page, 0, &op))
		return -EINVAL;

	if ((op != 1) && (op != 0))
		return -EINVAL;

	core_update_device_list_access(lacl->mapped_lun, (op) ?
			TRANSPORT_LUNFLAGS_READ_ONLY :
			TRANSPORT_LUNFLAGS_READ_WRITE,
			lacl->se_lun_nacl);

	printk(KERN_INFO "%s_ConfigFS: Changed Initiator ACL: %s"
		" Mapped LUN: %u Write Protect bit to %s\n",
		TPG_TFO(se_tpg)->get_fabric_name(),
		lacl->initiatorname, lacl->mapped_lun, (op) ? "ON" : "OFF");

	return count;

}

TCM_MAPPEDLUN_ATTR(write_protect, S_IRUGO | S_IWUSR);

CONFIGFS_EATTR_OPS(target_fabric_mappedlun, se_lun_acl, se_lun_group);

static struct configfs_attribute *target_fabric_mappedlun_attrs[] = {
	&target_fabric_mappedlun_write_protect.attr,
	NULL,
};

static struct configfs_item_operations target_fabric_mappedlun_item_ops = {
	.show_attribute		= target_fabric_mappedlun_attr_show,
	.store_attribute	= target_fabric_mappedlun_attr_store,
	.allow_link		= target_fabric_mappedlun_link,
	.drop_link		= target_fabric_mappedlun_unlink,
};

TF_CIT_SETUP(tpg_mappedlun, &target_fabric_mappedlun_item_ops, NULL,
		target_fabric_mappedlun_attrs);

/* End of tfc_tpg_mappedlun_cit */

/* Start of tfc_tpg_nacl_attrib_cit */

CONFIGFS_EATTR_OPS(target_fabric_nacl_attrib, se_node_acl, acl_attrib_group);

static struct configfs_item_operations target_fabric_nacl_attrib_item_ops = {
	.show_attribute		= target_fabric_nacl_attrib_attr_show,
	.store_attribute	= target_fabric_nacl_attrib_attr_store,
};

TF_CIT_SETUP(tpg_nacl_attrib, &target_fabric_nacl_attrib_item_ops, NULL, NULL);

/* End of tfc_tpg_nacl_attrib_cit */

/* Start of tfc_tpg_nacl_auth_cit */

CONFIGFS_EATTR_OPS(target_fabric_nacl_auth, se_node_acl, acl_auth_group);

static struct configfs_item_operations target_fabric_nacl_auth_item_ops = {
	.show_attribute		= target_fabric_nacl_auth_attr_show,
	.store_attribute	= target_fabric_nacl_auth_attr_store,
};

TF_CIT_SETUP(tpg_nacl_auth, &target_fabric_nacl_auth_item_ops, NULL, NULL);

/* End of tfc_tpg_nacl_auth_cit */

/* Start of tfc_tpg_nacl_param_cit */

CONFIGFS_EATTR_OPS(target_fabric_nacl_param, se_node_acl, acl_param_group);

static struct configfs_item_operations target_fabric_nacl_param_item_ops = {
	.show_attribute		= target_fabric_nacl_param_attr_show,
	.store_attribute	= target_fabric_nacl_param_attr_store,
};

TF_CIT_SETUP(tpg_nacl_param, &target_fabric_nacl_param_item_ops, NULL, NULL);

/* End of tfc_tpg_nacl_param_cit */

/* Start of tfc_tpg_nacl_base_cit */

CONFIGFS_EATTR_OPS(target_fabric_nacl_base, se_node_acl, acl_group);

static struct config_group *target_fabric_make_mappedlun(
	struct config_group *group,
	const char *name)
{
	struct se_node_acl *se_nacl = container_of(group,
			struct se_node_acl, acl_group);
	struct se_portal_group *se_tpg = se_nacl->se_tpg;
	struct target_fabric_configfs *tf = se_tpg->se_tpg_wwn->wwn_tf;
	struct se_lun_acl *lacl;
	struct config_item *acl_ci;
	char *buf;
	unsigned long mapped_lun;
	int ret = 0;

	acl_ci = &group->cg_item;
	if (!(acl_ci)) {
		printk(KERN_ERR "Unable to locatel acl_ci\n");
		return NULL;
	}

	buf = kzalloc(strlen(name) + 1, GFP_KERNEL);
	if (!(buf)) {
		printk(KERN_ERR "Unable to allocate memory for name buf\n");
		return ERR_PTR(-ENOMEM);
	}
	snprintf(buf, strlen(name) + 1, "%s", name);
	/*
	 * Make sure user is creating iscsi/$IQN/$TPGT/acls/$INITIATOR/lun_$ID.
	 */
	if (strstr(buf, "lun_") != buf) {
		printk(KERN_ERR "Unable to locate \"lun_\" from buf: %s"
			" name: %s\n", buf, name);
		ret = -EINVAL;
		goto out;
	}
	/*
	 * Determine the Mapped LUN value.  This is what the SCSI Initiator
	 * Port will actually see.
	 */
	if (strict_strtoul(buf + 4, 0, &mapped_lun) || mapped_lun > UINT_MAX) {
		ret = -EINVAL;
		goto out;
	}

	lacl = core_dev_init_initiator_node_lun_acl(se_tpg, mapped_lun,
			config_item_name(acl_ci), &ret);
	if (!(lacl))
		goto out;

	config_group_init_type_name(&lacl->se_lun_group, name,
			&TF_CIT_TMPL(tf)->tfc_tpg_mappedlun_cit);

	kfree(buf);
	return &lacl->se_lun_group;
out:
	kfree(buf);
	return ERR_PTR(ret);
}

static void target_fabric_drop_mappedlun(
	struct config_group *group,
	struct config_item *item)
{
	struct se_lun_acl *lacl = container_of(to_config_group(item),
			struct se_lun_acl, se_lun_group);
	struct se_portal_group *se_tpg = lacl->se_lun_nacl->se_tpg;

	config_item_put(item);
	core_dev_free_initiator_node_lun_acl(se_tpg, lacl);
}

static struct configfs_item_operations target_fabric_nacl_base_item_ops = {
	.show_attribute		= target_fabric_nacl_base_attr_show,
	.store_attribute	= target_fabric_nacl_base_attr_store,
};

static struct configfs_group_operations target_fabric_nacl_base_group_ops = {
	.make_group		= target_fabric_make_mappedlun,
	.drop_item		= target_fabric_drop_mappedlun,
};

TF_CIT_SETUP(tpg_nacl_base, &target_fabric_nacl_base_item_ops,
		&target_fabric_nacl_base_group_ops, NULL);

/* End of tfc_tpg_nacl_base_cit */

/* Start of tfc_tpg_nacl_cit */

static struct config_group *target_fabric_make_nodeacl(
	struct config_group *group,
	const char *name)
{
	struct se_portal_group *se_tpg = container_of(group,
			struct se_portal_group, tpg_acl_group);
	struct target_fabric_configfs *tf = se_tpg->se_tpg_wwn->wwn_tf;
	struct se_node_acl *se_nacl;
	struct config_group *nacl_cg;

	if (!(tf->tf_ops.fabric_make_nodeacl)) {
		printk(KERN_ERR "tf->tf_ops.fabric_make_nodeacl is NULL\n");
		return ERR_PTR(-ENOSYS);
	}

	se_nacl = tf->tf_ops.fabric_make_nodeacl(se_tpg, group, name);
	if (IS_ERR(se_nacl))
		return ERR_PTR(PTR_ERR(se_nacl));

	nacl_cg = &se_nacl->acl_group;
	nacl_cg->default_groups = se_nacl->acl_default_groups;
	nacl_cg->default_groups[0] = &se_nacl->acl_attrib_group;
	nacl_cg->default_groups[1] = &se_nacl->acl_auth_group;
	nacl_cg->default_groups[2] = &se_nacl->acl_param_group;
	nacl_cg->default_groups[3] = NULL;

	config_group_init_type_name(&se_nacl->acl_group, name,
			&TF_CIT_TMPL(tf)->tfc_tpg_nacl_base_cit);
	config_group_init_type_name(&se_nacl->acl_attrib_group, "attrib",
			&TF_CIT_TMPL(tf)->tfc_tpg_nacl_attrib_cit);
	config_group_init_type_name(&se_nacl->acl_auth_group, "auth",
			&TF_CIT_TMPL(tf)->tfc_tpg_nacl_auth_cit);
	config_group_init_type_name(&se_nacl->acl_param_group, "param",
			&TF_CIT_TMPL(tf)->tfc_tpg_nacl_param_cit);

	return &se_nacl->acl_group;
}

static void target_fabric_drop_nodeacl(
	struct config_group *group,
	struct config_item *item)
{
	struct se_portal_group *se_tpg = container_of(group,
			struct se_portal_group, tpg_acl_group);
	struct target_fabric_configfs *tf = se_tpg->se_tpg_wwn->wwn_tf;
	struct se_node_acl *se_nacl = container_of(to_config_group(item),
			struct se_node_acl, acl_group);
	struct config_item *df_item;
	struct config_group *nacl_cg;
	int i;

	nacl_cg = &se_nacl->acl_group;
	for (i = 0; nacl_cg->default_groups[i]; i++) {
		df_item = &nacl_cg->default_groups[i]->cg_item;
		nacl_cg->default_groups[i] = NULL;
		config_item_put(df_item);
	}

	config_item_put(item);
	tf->tf_ops.fabric_drop_nodeacl(se_nacl);
}

static struct configfs_group_operations target_fabric_nacl_group_ops = {
	.make_group	= target_fabric_make_nodeacl,
	.drop_item	= target_fabric_drop_nodeacl,
};

TF_CIT_SETUP(tpg_nacl, NULL, &target_fabric_nacl_group_ops, NULL);

/* End of tfc_tpg_nacl_cit */

/* Start of tfc_tpg_np_base_cit */

CONFIGFS_EATTR_OPS(target_fabric_np_base, se_tpg_np, tpg_np_group);

static struct configfs_item_operations target_fabric_np_base_item_ops = {
	.show_attribute		= target_fabric_np_base_attr_show,
	.store_attribute	= target_fabric_np_base_attr_store,
};

TF_CIT_SETUP(tpg_np_base, &target_fabric_np_base_item_ops, NULL, NULL);

/* End of tfc_tpg_np_base_cit */

/* Start of tfc_tpg_np_cit */

static struct config_group *target_fabric_make_np(
	struct config_group *group,
	const char *name)
{
	struct se_portal_group *se_tpg = container_of(group,
				struct se_portal_group, tpg_np_group);
	struct target_fabric_configfs *tf = se_tpg->se_tpg_wwn->wwn_tf;
	struct se_tpg_np *se_tpg_np;

	if (!(tf->tf_ops.fabric_make_np)) {
		printk(KERN_ERR "tf->tf_ops.fabric_make_np is NULL\n");
		return ERR_PTR(-ENOSYS);
	}

	se_tpg_np = tf->tf_ops.fabric_make_np(se_tpg, group, name);
	if (!(se_tpg_np) || IS_ERR(se_tpg_np))
		return ERR_PTR(-EINVAL);

	config_group_init_type_name(&se_tpg_np->tpg_np_group, name,
			&TF_CIT_TMPL(tf)->tfc_tpg_np_base_cit);

	return &se_tpg_np->tpg_np_group;
}

static void target_fabric_drop_np(
	struct config_group *group,
	struct config_item *item)
{
	struct se_portal_group *se_tpg = container_of(group,
				struct se_portal_group, tpg_np_group);
	struct target_fabric_configfs *tf = se_tpg->se_tpg_wwn->wwn_tf;
	struct se_tpg_np *se_tpg_np = container_of(to_config_group(item),
				struct se_tpg_np, tpg_np_group);

	config_item_put(item);
	tf->tf_ops.fabric_drop_np(se_tpg_np);
}

static struct configfs_group_operations target_fabric_np_group_ops = {
	.make_group	= &target_fabric_make_np,
	.drop_item	= &target_fabric_drop_np,
};

TF_CIT_SETUP(tpg_np, NULL, &target_fabric_np_group_ops, NULL);

/* End of tfc_tpg_np_cit */

/* Start of tfc_tpg_port_cit */

CONFIGFS_EATTR_STRUCT(target_fabric_port, se_lun);
#define TCM_PORT_ATTR(_name, _mode)					\
static struct target_fabric_port_attribute target_fabric_port_##_name =	\
	__CONFIGFS_EATTR(_name, _mode,					\
	target_fabric_port_show_attr_##_name,				\
	target_fabric_port_store_attr_##_name);

#define TCM_PORT_ATTOR_RO(_name)					\
	__CONFIGFS_EATTR_RO(_name,					\
	target_fabric_port_show_attr_##_name);

/*
 * alua_tg_pt_gp
 */
static ssize_t target_fabric_port_show_attr_alua_tg_pt_gp(
	struct se_lun *lun,
	char *page)
{
	if (!(lun))
		return -ENODEV;

	if (!(lun->lun_sep))
		return -ENODEV;

	return core_alua_show_tg_pt_gp_info(lun->lun_sep, page);
}

static ssize_t target_fabric_port_store_attr_alua_tg_pt_gp(
	struct se_lun *lun,
	const char *page,
	size_t count)
{
	if (!(lun))
		return -ENODEV;

	if (!(lun->lun_sep))
		return -ENODEV;

	return core_alua_store_tg_pt_gp_info(lun->lun_sep, page, count);
}

TCM_PORT_ATTR(alua_tg_pt_gp, S_IRUGO | S_IWUSR);

/*
 * alua_tg_pt_offline
 */
static ssize_t target_fabric_port_show_attr_alua_tg_pt_offline(
	struct se_lun *lun,
	char *page)
{
	if (!(lun))
		return -ENODEV;

	if (!(lun->lun_sep))
		return -ENODEV;

	return core_alua_show_offline_bit(lun, page);
}

static ssize_t target_fabric_port_store_attr_alua_tg_pt_offline(
	struct se_lun *lun,
	const char *page,
	size_t count)
{
	if (!(lun))
		return -ENODEV;

	if (!(lun->lun_sep))
		return -ENODEV;

	return core_alua_store_offline_bit(lun, page, count);
}

TCM_PORT_ATTR(alua_tg_pt_offline, S_IRUGO | S_IWUSR);

/*
 * alua_tg_pt_status
 */
static ssize_t target_fabric_port_show_attr_alua_tg_pt_status(
	struct se_lun *lun,
	char *page)
{
	if (!(lun))
		return -ENODEV;

	if (!(lun->lun_sep))
		return -ENODEV;

	return core_alua_show_secondary_status(lun, page);
}

static ssize_t target_fabric_port_store_attr_alua_tg_pt_status(
	struct se_lun *lun,
	const char *page,
	size_t count)
{
	if (!(lun))
		return -ENODEV;

	if (!(lun->lun_sep))
		return -ENODEV;

	return core_alua_store_secondary_status(lun, page, count);
}

TCM_PORT_ATTR(alua_tg_pt_status, S_IRUGO | S_IWUSR);

/*
 * alua_tg_pt_write_md
 */
static ssize_t target_fabric_port_show_attr_alua_tg_pt_write_md(
	struct se_lun *lun,
	char *page)
{
	if (!(lun))
		return -ENODEV;

	if (!(lun->lun_sep))
		return -ENODEV;

	return core_alua_show_secondary_write_metadata(lun, page);
}

static ssize_t target_fabric_port_store_attr_alua_tg_pt_write_md(
	struct se_lun *lun,
	const char *page,
	size_t count)
{
	if (!(lun))
		return -ENODEV;

	if (!(lun->lun_sep))
		return -ENODEV;

	return core_alua_store_secondary_write_metadata(lun, page, count);
}

TCM_PORT_ATTR(alua_tg_pt_write_md, S_IRUGO | S_IWUSR);


static struct configfs_attribute *target_fabric_port_attrs[] = {
	&target_fabric_port_alua_tg_pt_gp.attr,
	&target_fabric_port_alua_tg_pt_offline.attr,
	&target_fabric_port_alua_tg_pt_status.attr,
	&target_fabric_port_alua_tg_pt_write_md.attr,
	NULL,
};

CONFIGFS_EATTR_OPS(target_fabric_port, se_lun, lun_group);

static int target_fabric_port_link(
	struct config_item *lun_ci,
	struct config_item *se_dev_ci)
{
	struct config_item *tpg_ci;
	struct se_device *dev;
	struct se_lun *lun = container_of(to_config_group(lun_ci),
				struct se_lun, lun_group);
	struct se_lun *lun_p;
	struct se_portal_group *se_tpg;
	struct se_subsystem_dev *se_dev = container_of(
				to_config_group(se_dev_ci), struct se_subsystem_dev,
				se_dev_group);
	struct target_fabric_configfs *tf;
	int ret;

	tpg_ci = &lun_ci->ci_parent->ci_group->cg_item;
	se_tpg = container_of(to_config_group(tpg_ci),
				struct se_portal_group, tpg_group);
	tf = se_tpg->se_tpg_wwn->wwn_tf;

	if (lun->lun_se_dev !=  NULL) {
		printk(KERN_ERR "Port Symlink already exists\n");
		return -EEXIST;
	}

	dev = se_dev->se_dev_ptr;
	if (!(dev)) {
		printk(KERN_ERR "Unable to locate struct se_device pointer from"
			" %s\n", config_item_name(se_dev_ci));
		ret = -ENODEV;
		goto out;
	}

	lun_p = core_dev_add_lun(se_tpg, dev->se_hba, dev,
				lun->unpacked_lun);
	if ((IS_ERR(lun_p)) || !(lun_p)) {
		printk(KERN_ERR "core_dev_add_lun() failed\n");
		ret = -EINVAL;
		goto out;
	}

	if (tf->tf_ops.fabric_post_link) {
		/*
		 * Call the optional fabric_post_link() to allow a
		 * fabric module to setup any additional state once
		 * core_dev_add_lun() has been called..
		 */
		tf->tf_ops.fabric_post_link(se_tpg, lun);
	}

	return 0;
out:
	return ret;
}

static int target_fabric_port_unlink(
	struct config_item *lun_ci,
	struct config_item *se_dev_ci)
{
	struct se_lun *lun = container_of(to_config_group(lun_ci),
				struct se_lun, lun_group);
	struct se_portal_group *se_tpg = lun->lun_sep->sep_tpg;
	struct target_fabric_configfs *tf = se_tpg->se_tpg_wwn->wwn_tf;

	if (tf->tf_ops.fabric_pre_unlink) {
		/*
		 * Call the optional fabric_pre_unlink() to allow a
		 * fabric module to release any additional stat before
		 * core_dev_del_lun() is called.
		*/
		tf->tf_ops.fabric_pre_unlink(se_tpg, lun);
	}

	core_dev_del_lun(se_tpg, lun->unpacked_lun);
	return 0;
}

static struct configfs_item_operations target_fabric_port_item_ops = {
	.show_attribute		= target_fabric_port_attr_show,
	.store_attribute	= target_fabric_port_attr_store,
	.allow_link		= target_fabric_port_link,
	.drop_link		= target_fabric_port_unlink,
};

TF_CIT_SETUP(tpg_port, &target_fabric_port_item_ops, NULL, target_fabric_port_attrs);

/* End of tfc_tpg_port_cit */

/* Start of tfc_tpg_lun_cit */

static struct config_group *target_fabric_make_lun(
	struct config_group *group,
	const char *name)
{
	struct se_lun *lun;
	struct se_portal_group *se_tpg = container_of(group,
			struct se_portal_group, tpg_lun_group);
	struct target_fabric_configfs *tf = se_tpg->se_tpg_wwn->wwn_tf;
	unsigned long unpacked_lun;

	if (strstr(name, "lun_") != name) {
		printk(KERN_ERR "Unable to locate \'_\" in"
				" \"lun_$LUN_NUMBER\"\n");
		return ERR_PTR(-EINVAL);
	}
	if (strict_strtoul(name + 4, 0, &unpacked_lun) || unpacked_lun > UINT_MAX)
		return ERR_PTR(-EINVAL);

	lun = core_get_lun_from_tpg(se_tpg, unpacked_lun);
	if (!(lun))
		return ERR_PTR(-EINVAL);

	config_group_init_type_name(&lun->lun_group, name,
			&TF_CIT_TMPL(tf)->tfc_tpg_port_cit);

	return &lun->lun_group;
}

static void target_fabric_drop_lun(
	struct config_group *group,
	struct config_item *item)
{
	config_item_put(item);
}

static struct configfs_group_operations target_fabric_lun_group_ops = {
	.make_group	= &target_fabric_make_lun,
	.drop_item	= &target_fabric_drop_lun,
};

TF_CIT_SETUP(tpg_lun, NULL, &target_fabric_lun_group_ops, NULL);

/* End of tfc_tpg_lun_cit */

/* Start of tfc_tpg_attrib_cit */

CONFIGFS_EATTR_OPS(target_fabric_tpg_attrib, se_portal_group, tpg_attrib_group);

static struct configfs_item_operations target_fabric_tpg_attrib_item_ops = {
	.show_attribute		= target_fabric_tpg_attrib_attr_show,
	.store_attribute	= target_fabric_tpg_attrib_attr_store,
};

TF_CIT_SETUP(tpg_attrib, &target_fabric_tpg_attrib_item_ops, NULL, NULL);

/* End of tfc_tpg_attrib_cit */

/* Start of tfc_tpg_param_cit */

CONFIGFS_EATTR_OPS(target_fabric_tpg_param, se_portal_group, tpg_param_group);

static struct configfs_item_operations target_fabric_tpg_param_item_ops = {
	.show_attribute		= target_fabric_tpg_param_attr_show,
	.store_attribute	= target_fabric_tpg_param_attr_store,
};

TF_CIT_SETUP(tpg_param, &target_fabric_tpg_param_item_ops, NULL, NULL);

/* End of tfc_tpg_param_cit */

/* Start of tfc_tpg_base_cit */
/*
 * For use with TF_TPG_ATTR() and TF_TPG_ATTR_RO()
 */
CONFIGFS_EATTR_OPS(target_fabric_tpg, se_portal_group, tpg_group);

static struct configfs_item_operations target_fabric_tpg_base_item_ops = {
	.show_attribute		= target_fabric_tpg_attr_show,
	.store_attribute	= target_fabric_tpg_attr_store,
};

TF_CIT_SETUP(tpg_base, &target_fabric_tpg_base_item_ops, NULL, NULL);

/* End of tfc_tpg_base_cit */

/* Start of tfc_tpg_cit */

static struct config_group *target_fabric_make_tpg(
	struct config_group *group,
	const char *name)
{
	struct se_wwn *wwn = container_of(group, struct se_wwn, wwn_group);
	struct target_fabric_configfs *tf = wwn->wwn_tf;
	struct se_portal_group *se_tpg;

	if (!(tf->tf_ops.fabric_make_tpg)) {
		printk(KERN_ERR "tf->tf_ops.fabric_make_tpg is NULL\n");
		return ERR_PTR(-ENOSYS);
	}

	se_tpg = tf->tf_ops.fabric_make_tpg(wwn, group, name);
	if (!(se_tpg) || IS_ERR(se_tpg))
		return ERR_PTR(-EINVAL);
	/*
	 * Setup default groups from pre-allocated se_tpg->tpg_default_groups
	 */
	se_tpg->tpg_group.default_groups = se_tpg->tpg_default_groups;
	se_tpg->tpg_group.default_groups[0] = &se_tpg->tpg_lun_group;
	se_tpg->tpg_group.default_groups[1] = &se_tpg->tpg_np_group;
	se_tpg->tpg_group.default_groups[2] = &se_tpg->tpg_acl_group;
	se_tpg->tpg_group.default_groups[3] = &se_tpg->tpg_attrib_group;
	se_tpg->tpg_group.default_groups[4] = &se_tpg->tpg_param_group;
	se_tpg->tpg_group.default_groups[5] = NULL;

	config_group_init_type_name(&se_tpg->tpg_group, name,
			&TF_CIT_TMPL(tf)->tfc_tpg_base_cit);
	config_group_init_type_name(&se_tpg->tpg_lun_group, "lun",
			&TF_CIT_TMPL(tf)->tfc_tpg_lun_cit);
	config_group_init_type_name(&se_tpg->tpg_np_group, "np",
			&TF_CIT_TMPL(tf)->tfc_tpg_np_cit);
	config_group_init_type_name(&se_tpg->tpg_acl_group, "acls",
			&TF_CIT_TMPL(tf)->tfc_tpg_nacl_cit);
	config_group_init_type_name(&se_tpg->tpg_attrib_group, "attrib",
			&TF_CIT_TMPL(tf)->tfc_tpg_attrib_cit);
	config_group_init_type_name(&se_tpg->tpg_param_group, "param",
			&TF_CIT_TMPL(tf)->tfc_tpg_param_cit);

	return &se_tpg->tpg_group;
}

static void target_fabric_drop_tpg(
	struct config_group *group,
	struct config_item *item)
{
	struct se_wwn *wwn = container_of(group, struct se_wwn, wwn_group);
	struct target_fabric_configfs *tf = wwn->wwn_tf;
	struct se_portal_group *se_tpg = container_of(to_config_group(item),
				struct se_portal_group, tpg_group);
	struct config_group *tpg_cg = &se_tpg->tpg_group;
	struct config_item *df_item;
	int i;
	/*
	 * Release default groups, but do not release tpg_cg->default_groups
	 * memory as it is statically allocated at se_tpg->tpg_default_groups.
	 */
	for (i = 0; tpg_cg->default_groups[i]; i++) {
		df_item = &tpg_cg->default_groups[i]->cg_item;
		tpg_cg->default_groups[i] = NULL;
		config_item_put(df_item);
	}

	config_item_put(item);
	tf->tf_ops.fabric_drop_tpg(se_tpg);
}

static struct configfs_group_operations target_fabric_tpg_group_ops = {
	.make_group	= target_fabric_make_tpg,
	.drop_item	= target_fabric_drop_tpg,
};

TF_CIT_SETUP(tpg, NULL, &target_fabric_tpg_group_ops, NULL);

/* End of tfc_tpg_cit */

/* Start of tfc_wwn_cit */

static struct config_group *target_fabric_make_wwn(
	struct config_group *group,
	const char *name)
{
	struct target_fabric_configfs *tf = container_of(group,
				struct target_fabric_configfs, tf_group);
	struct se_wwn *wwn;

	if (!(tf->tf_ops.fabric_make_wwn)) {
		printk(KERN_ERR "tf->tf_ops.fabric_make_wwn is NULL\n");
		return ERR_PTR(-ENOSYS);
	}

	wwn = tf->tf_ops.fabric_make_wwn(tf, group, name);
	if (!(wwn) || IS_ERR(wwn))
		return ERR_PTR(-EINVAL);

	wwn->wwn_tf = tf;
	config_group_init_type_name(&wwn->wwn_group, name,
			&TF_CIT_TMPL(tf)->tfc_tpg_cit);

	return &wwn->wwn_group;
}

static void target_fabric_drop_wwn(
	struct config_group *group,
	struct config_item *item)
{
	struct target_fabric_configfs *tf = container_of(group,
				struct target_fabric_configfs, tf_group);
	struct se_wwn *wwn = container_of(to_config_group(item),
				struct se_wwn, wwn_group);

	config_item_put(item);
	tf->tf_ops.fabric_drop_wwn(wwn);
}

static struct configfs_group_operations target_fabric_wwn_group_ops = {
	.make_group	= target_fabric_make_wwn,
	.drop_item	= target_fabric_drop_wwn,
};
/*
 * For use with TF_WWN_ATTR() and TF_WWN_ATTR_RO()
 */
CONFIGFS_EATTR_OPS(target_fabric_wwn, target_fabric_configfs, tf_group);

static struct configfs_item_operations target_fabric_wwn_item_ops = {
	.show_attribute		= target_fabric_wwn_attr_show,
	.store_attribute	= target_fabric_wwn_attr_store,
};

TF_CIT_SETUP(wwn, &target_fabric_wwn_item_ops, &target_fabric_wwn_group_ops, NULL);

/* End of tfc_wwn_cit */

/* Start of tfc_discovery_cit */

CONFIGFS_EATTR_OPS(target_fabric_discovery, target_fabric_configfs,
		tf_disc_group);

static struct configfs_item_operations target_fabric_discovery_item_ops = {
	.show_attribute		= target_fabric_discovery_attr_show,
	.store_attribute	= target_fabric_discovery_attr_store,
};

TF_CIT_SETUP(discovery, &target_fabric_discovery_item_ops, NULL, NULL);

/* End of tfc_discovery_cit */

int target_fabric_setup_cits(struct target_fabric_configfs *tf)
{
	target_fabric_setup_discovery_cit(tf);
	target_fabric_setup_wwn_cit(tf);
	target_fabric_setup_tpg_cit(tf);
	target_fabric_setup_tpg_base_cit(tf);
	target_fabric_setup_tpg_port_cit(tf);
	target_fabric_setup_tpg_lun_cit(tf);
	target_fabric_setup_tpg_np_cit(tf);
	target_fabric_setup_tpg_np_base_cit(tf);
	target_fabric_setup_tpg_attrib_cit(tf);
	target_fabric_setup_tpg_param_cit(tf);
	target_fabric_setup_tpg_nacl_cit(tf);
	target_fabric_setup_tpg_nacl_base_cit(tf);
	target_fabric_setup_tpg_nacl_attrib_cit(tf);
	target_fabric_setup_tpg_nacl_auth_cit(tf);
	target_fabric_setup_tpg_nacl_param_cit(tf);
	target_fabric_setup_tpg_mappedlun_cit(tf);

	return 0;
}