Free Electrons

Embedded Linux Experts

  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
/*
 * Copyright(c) 2011 - 2012 Intel Corporation. All rights reserved.
 *
 * This program is free software; you can redistribute it and/or modify it
 * under the terms and conditions of the GNU General Public License,
 * version 2, as published by the Free Software Foundation.
 *
 * This program is distributed in the hope 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.
 *
 * You should have received a copy of the GNU General Public License along with
 * this program; if not, write to the Free Software Foundation, Inc.,
 * 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
 *
 * Maintained at www.Open-FCoE.org
 */

#include <linux/module.h>
#include <linux/types.h>
#include <linux/kernel.h>
#include <linux/etherdevice.h>
#include <linux/ctype.h>

#include <scsi/fcoe_sysfs.h>
#include <scsi/libfcoe.h>

/*
 * OK to include local libfcoe.h for debug_logging, but cannot include
 * <scsi/libfcoe.h> otherwise non-netdev based fcoe solutions would have
 * have to include more than fcoe_sysfs.h.
 */
#include "libfcoe.h"

static atomic_t ctlr_num;
static atomic_t fcf_num;

/*
 * fcoe_fcf_dev_loss_tmo: the default number of seconds that fcoe sysfs
 * should insulate the loss of a fcf.
 */
static unsigned int fcoe_fcf_dev_loss_tmo = 1800;  /* seconds */

module_param_named(fcf_dev_loss_tmo, fcoe_fcf_dev_loss_tmo,
		   uint, S_IRUGO|S_IWUSR);
MODULE_PARM_DESC(fcf_dev_loss_tmo,
		 "Maximum number of seconds that libfcoe should"
		 " insulate the loss of a fcf. Once this value is"
		 " exceeded, the fcf is removed.");

/*
 * These are used by the fcoe_*_show_function routines, they
 * are intentionally placed in the .c file as they're not intended
 * for use throughout the code.
 */
#define fcoe_ctlr_id(x)				\
	((x)->id)
#define fcoe_ctlr_work_q_name(x)		\
	((x)->work_q_name)
#define fcoe_ctlr_work_q(x)			\
	((x)->work_q)
#define fcoe_ctlr_devloss_work_q_name(x)	\
	((x)->devloss_work_q_name)
#define fcoe_ctlr_devloss_work_q(x)		\
	((x)->devloss_work_q)
#define fcoe_ctlr_mode(x)			\
	((x)->mode)
#define fcoe_ctlr_fcf_dev_loss_tmo(x)		\
	((x)->fcf_dev_loss_tmo)
#define fcoe_ctlr_link_fail(x)			\
	((x)->lesb.lesb_link_fail)
#define fcoe_ctlr_vlink_fail(x)			\
	((x)->lesb.lesb_vlink_fail)
#define fcoe_ctlr_miss_fka(x)			\
	((x)->lesb.lesb_miss_fka)
#define fcoe_ctlr_symb_err(x)			\
	((x)->lesb.lesb_symb_err)
#define fcoe_ctlr_err_block(x)			\
	((x)->lesb.lesb_err_block)
#define fcoe_ctlr_fcs_error(x)			\
	((x)->lesb.lesb_fcs_error)
#define fcoe_ctlr_enabled(x)			\
	((x)->enabled)
#define fcoe_fcf_state(x)			\
	((x)->state)
#define fcoe_fcf_fabric_name(x)			\
	((x)->fabric_name)
#define fcoe_fcf_switch_name(x)			\
	((x)->switch_name)
#define fcoe_fcf_fc_map(x)			\
	((x)->fc_map)
#define fcoe_fcf_vfid(x)			\
	((x)->vfid)
#define fcoe_fcf_mac(x)				\
	((x)->mac)
#define fcoe_fcf_priority(x)			\
	((x)->priority)
#define fcoe_fcf_fka_period(x)			\
	((x)->fka_period)
#define fcoe_fcf_dev_loss_tmo(x)		\
	((x)->dev_loss_tmo)
#define fcoe_fcf_selected(x)			\
	((x)->selected)
#define fcoe_fcf_vlan_id(x)			\
	((x)->vlan_id)

/*
 * dev_loss_tmo attribute
 */
static int fcoe_str_to_dev_loss(const char *buf, unsigned long *val)
{
	int ret;

	ret = kstrtoul(buf, 0, val);
	if (ret)
		return -EINVAL;
	/*
	 * Check for overflow; dev_loss_tmo is u32
	 */
	if (*val > UINT_MAX)
		return -EINVAL;

	return 0;
}

static int fcoe_fcf_set_dev_loss_tmo(struct fcoe_fcf_device *fcf,
				     unsigned long val)
{
	if ((fcf->state == FCOE_FCF_STATE_UNKNOWN) ||
	    (fcf->state == FCOE_FCF_STATE_DISCONNECTED) ||
	    (fcf->state == FCOE_FCF_STATE_DELETED))
		return -EBUSY;
	/*
	 * Check for overflow; dev_loss_tmo is u32
	 */
	if (val > UINT_MAX)
		return -EINVAL;

	fcoe_fcf_dev_loss_tmo(fcf) = val;
	return 0;
}

#define FCOE_DEVICE_ATTR(_prefix, _name, _mode, _show, _store)	\
struct device_attribute device_attr_fcoe_##_prefix##_##_name =	\
	__ATTR(_name, _mode, _show, _store)

#define fcoe_ctlr_show_function(field, format_string, sz, cast)	\
static ssize_t show_fcoe_ctlr_device_##field(struct device *dev, \
					    struct device_attribute *attr, \
					    char *buf)			\
{									\
	struct fcoe_ctlr_device *ctlr = dev_to_ctlr(dev);		\
	if (ctlr->f->get_fcoe_ctlr_##field)				\
		ctlr->f->get_fcoe_ctlr_##field(ctlr);			\
	return snprintf(buf, sz, format_string,				\
			cast fcoe_ctlr_##field(ctlr));			\
}

#define fcoe_fcf_show_function(field, format_string, sz, cast)	\
static ssize_t show_fcoe_fcf_device_##field(struct device *dev,	\
					   struct device_attribute *attr, \
					   char *buf)			\
{									\
	struct fcoe_fcf_device *fcf = dev_to_fcf(dev);			\
	struct fcoe_ctlr_device *ctlr = fcoe_fcf_dev_to_ctlr_dev(fcf);	\
	if (ctlr->f->get_fcoe_fcf_##field)				\
		ctlr->f->get_fcoe_fcf_##field(fcf);			\
	return snprintf(buf, sz, format_string,				\
			cast fcoe_fcf_##field(fcf));			\
}

#define fcoe_ctlr_private_show_function(field, format_string, sz, cast)	\
static ssize_t show_fcoe_ctlr_device_##field(struct device *dev, \
					    struct device_attribute *attr, \
					    char *buf)			\
{									\
	struct fcoe_ctlr_device *ctlr = dev_to_ctlr(dev);		\
	return snprintf(buf, sz, format_string, cast fcoe_ctlr_##field(ctlr)); \
}

#define fcoe_fcf_private_show_function(field, format_string, sz, cast)	\
static ssize_t show_fcoe_fcf_device_##field(struct device *dev,	\
					   struct device_attribute *attr, \
					   char *buf)			\
{								\
	struct fcoe_fcf_device *fcf = dev_to_fcf(dev);			\
	return snprintf(buf, sz, format_string, cast fcoe_fcf_##field(fcf)); \
}

#define fcoe_ctlr_private_rd_attr(field, format_string, sz)		\
	fcoe_ctlr_private_show_function(field, format_string, sz, )	\
	static FCOE_DEVICE_ATTR(ctlr, field, S_IRUGO,			\
				show_fcoe_ctlr_device_##field, NULL)

#define fcoe_ctlr_rd_attr(field, format_string, sz)			\
	fcoe_ctlr_show_function(field, format_string, sz, )		\
	static FCOE_DEVICE_ATTR(ctlr, field, S_IRUGO,			\
				show_fcoe_ctlr_device_##field, NULL)

#define fcoe_fcf_rd_attr(field, format_string, sz)			\
	fcoe_fcf_show_function(field, format_string, sz, )		\
	static FCOE_DEVICE_ATTR(fcf, field, S_IRUGO,			\
				show_fcoe_fcf_device_##field, NULL)

#define fcoe_fcf_private_rd_attr(field, format_string, sz)		\
	fcoe_fcf_private_show_function(field, format_string, sz, )	\
	static FCOE_DEVICE_ATTR(fcf, field, S_IRUGO,			\
				show_fcoe_fcf_device_##field, NULL)

#define fcoe_ctlr_private_rd_attr_cast(field, format_string, sz, cast)	\
	fcoe_ctlr_private_show_function(field, format_string, sz, (cast)) \
	static FCOE_DEVICE_ATTR(ctlr, field, S_IRUGO,			\
				show_fcoe_ctlr_device_##field, NULL)

#define fcoe_fcf_private_rd_attr_cast(field, format_string, sz, cast)	\
	fcoe_fcf_private_show_function(field, format_string, sz, (cast)) \
	static FCOE_DEVICE_ATTR(fcf, field, S_IRUGO,			\
				show_fcoe_fcf_device_##field, NULL)

#define fcoe_enum_name_search(title, table_type, table)			\
static const char *get_fcoe_##title##_name(enum table_type table_key)	\
{									\
	if (table_key < 0 || table_key >= ARRAY_SIZE(table))		\
		return NULL;						\
	return table[table_key];					\
}

static char *fip_conn_type_names[] = {
	[ FIP_CONN_TYPE_UNKNOWN ] = "Unknown",
	[ FIP_CONN_TYPE_FABRIC ]  = "Fabric",
	[ FIP_CONN_TYPE_VN2VN ]   = "VN2VN",
};
fcoe_enum_name_search(ctlr_mode, fip_conn_type, fip_conn_type_names)

static enum fip_conn_type fcoe_parse_mode(const char *buf)
{
	int i;

	for (i = 0; i < ARRAY_SIZE(fip_conn_type_names); i++) {
		if (strcasecmp(buf, fip_conn_type_names[i]) == 0)
			return i;
	}

	return FIP_CONN_TYPE_UNKNOWN;
}

static char *fcf_state_names[] = {
	[ FCOE_FCF_STATE_UNKNOWN ]      = "Unknown",
	[ FCOE_FCF_STATE_DISCONNECTED ] = "Disconnected",
	[ FCOE_FCF_STATE_CONNECTED ]    = "Connected",
};
fcoe_enum_name_search(fcf_state, fcf_state, fcf_state_names)
#define FCOE_FCF_STATE_MAX_NAMELEN 50

static ssize_t show_fcf_state(struct device *dev,
			      struct device_attribute *attr,
			      char *buf)
{
	struct fcoe_fcf_device *fcf = dev_to_fcf(dev);
	const char *name;
	name = get_fcoe_fcf_state_name(fcf->state);
	if (!name)
		return -EINVAL;
	return snprintf(buf, FCOE_FCF_STATE_MAX_NAMELEN, "%s\n", name);
}
static FCOE_DEVICE_ATTR(fcf, state, S_IRUGO, show_fcf_state, NULL);

#define FCOE_MAX_MODENAME_LEN 20
static ssize_t show_ctlr_mode(struct device *dev,
			      struct device_attribute *attr,
			      char *buf)
{
	struct fcoe_ctlr_device *ctlr = dev_to_ctlr(dev);
	const char *name;

	name = get_fcoe_ctlr_mode_name(ctlr->mode);
	if (!name)
		return -EINVAL;
	return snprintf(buf, FCOE_MAX_MODENAME_LEN,
			"%s\n", name);
}

static ssize_t store_ctlr_mode(struct device *dev,
			       struct device_attribute *attr,
			       const char *buf, size_t count)
{
	struct fcoe_ctlr_device *ctlr = dev_to_ctlr(dev);
	char mode[FCOE_MAX_MODENAME_LEN + 1];

	if (count > FCOE_MAX_MODENAME_LEN)
		return -EINVAL;

	strncpy(mode, buf, count);

	if (mode[count - 1] == '\n')
		mode[count - 1] = '\0';
	else
		mode[count] = '\0';

	switch (ctlr->enabled) {
	case FCOE_CTLR_ENABLED:
		LIBFCOE_SYSFS_DBG(ctlr, "Cannot change mode when enabled.\n");
		return -EBUSY;
	case FCOE_CTLR_DISABLED:
		if (!ctlr->f->set_fcoe_ctlr_mode) {
			LIBFCOE_SYSFS_DBG(ctlr,
					  "Mode change not supported by LLD.\n");
			return -ENOTSUPP;
		}

		ctlr->mode = fcoe_parse_mode(mode);
		if (ctlr->mode == FIP_CONN_TYPE_UNKNOWN) {
			LIBFCOE_SYSFS_DBG(ctlr, "Unknown mode %s provided.\n",
					  buf);
			return -EINVAL;
		}

		ctlr->f->set_fcoe_ctlr_mode(ctlr);
		LIBFCOE_SYSFS_DBG(ctlr, "Mode changed to %s.\n", buf);

		return count;
	case FCOE_CTLR_UNUSED:
	default:
		LIBFCOE_SYSFS_DBG(ctlr, "Mode change not supported.\n");
		return -ENOTSUPP;
	};
}

static FCOE_DEVICE_ATTR(ctlr, mode, S_IRUGO | S_IWUSR,
			show_ctlr_mode, store_ctlr_mode);

static ssize_t store_ctlr_enabled(struct device *dev,
				  struct device_attribute *attr,
				  const char *buf, size_t count)
{
	struct fcoe_ctlr_device *ctlr = dev_to_ctlr(dev);
	int rc;

	switch (ctlr->enabled) {
	case FCOE_CTLR_ENABLED:
		if (*buf == '1')
			return count;
		ctlr->enabled = FCOE_CTLR_DISABLED;
		break;
	case FCOE_CTLR_DISABLED:
		if (*buf == '0')
			return count;
		ctlr->enabled = FCOE_CTLR_ENABLED;
		break;
	case FCOE_CTLR_UNUSED:
		return -ENOTSUPP;
	};

	rc = ctlr->f->set_fcoe_ctlr_enabled(ctlr);
	if (rc)
		return rc;

	return count;
}

static char *ctlr_enabled_state_names[] = {
	[ FCOE_CTLR_ENABLED ]  = "1",
	[ FCOE_CTLR_DISABLED ] = "0",
};
fcoe_enum_name_search(ctlr_enabled_state, ctlr_enabled_state,
		      ctlr_enabled_state_names)
#define FCOE_CTLR_ENABLED_MAX_NAMELEN 50

static ssize_t show_ctlr_enabled_state(struct device *dev,
				       struct device_attribute *attr,
				       char *buf)
{
	struct fcoe_ctlr_device *ctlr = dev_to_ctlr(dev);
	const char *name;

	name = get_fcoe_ctlr_enabled_state_name(ctlr->enabled);
	if (!name)
		return -EINVAL;
	return snprintf(buf, FCOE_CTLR_ENABLED_MAX_NAMELEN,
			"%s\n", name);
}

static FCOE_DEVICE_ATTR(ctlr, enabled, S_IRUGO | S_IWUSR,
			show_ctlr_enabled_state,
			store_ctlr_enabled);

static ssize_t
store_private_fcoe_ctlr_fcf_dev_loss_tmo(struct device *dev,
					 struct device_attribute *attr,
					 const char *buf, size_t count)
{
	struct fcoe_ctlr_device *ctlr = dev_to_ctlr(dev);
	struct fcoe_fcf_device *fcf;
	unsigned long val;
	int rc;

	rc = fcoe_str_to_dev_loss(buf, &val);
	if (rc)
		return rc;

	fcoe_ctlr_fcf_dev_loss_tmo(ctlr) = val;
	mutex_lock(&ctlr->lock);
	list_for_each_entry(fcf, &ctlr->fcfs, peers)
		fcoe_fcf_set_dev_loss_tmo(fcf, val);
	mutex_unlock(&ctlr->lock);
	return count;
}
fcoe_ctlr_private_show_function(fcf_dev_loss_tmo, "%d\n", 20, );
static FCOE_DEVICE_ATTR(ctlr, fcf_dev_loss_tmo, S_IRUGO | S_IWUSR,
			show_fcoe_ctlr_device_fcf_dev_loss_tmo,
			store_private_fcoe_ctlr_fcf_dev_loss_tmo);

/* Link Error Status Block (LESB) */
fcoe_ctlr_rd_attr(link_fail, "%u\n", 20);
fcoe_ctlr_rd_attr(vlink_fail, "%u\n", 20);
fcoe_ctlr_rd_attr(miss_fka, "%u\n", 20);
fcoe_ctlr_rd_attr(symb_err, "%u\n", 20);
fcoe_ctlr_rd_attr(err_block, "%u\n", 20);
fcoe_ctlr_rd_attr(fcs_error, "%u\n", 20);

fcoe_fcf_private_rd_attr_cast(fabric_name, "0x%llx\n", 20, unsigned long long);
fcoe_fcf_private_rd_attr_cast(switch_name, "0x%llx\n", 20, unsigned long long);
fcoe_fcf_private_rd_attr(priority, "%u\n", 20);
fcoe_fcf_private_rd_attr(fc_map, "0x%x\n", 20);
fcoe_fcf_private_rd_attr(vfid, "%u\n", 20);
fcoe_fcf_private_rd_attr(mac, "%pM\n", 20);
fcoe_fcf_private_rd_attr(fka_period, "%u\n", 20);
fcoe_fcf_rd_attr(selected, "%u\n", 20);
fcoe_fcf_rd_attr(vlan_id, "%u\n", 20);

fcoe_fcf_private_show_function(dev_loss_tmo, "%d\n", 20, )
static ssize_t
store_fcoe_fcf_dev_loss_tmo(struct device *dev, struct device_attribute *attr,
			    const char *buf, size_t count)
{
	struct fcoe_fcf_device *fcf = dev_to_fcf(dev);
	unsigned long val;
	int rc;

	rc = fcoe_str_to_dev_loss(buf, &val);
	if (rc)
		return rc;

	rc = fcoe_fcf_set_dev_loss_tmo(fcf, val);
	if (rc)
		return rc;
	return count;
}
static FCOE_DEVICE_ATTR(fcf, dev_loss_tmo, S_IRUGO | S_IWUSR,
			show_fcoe_fcf_device_dev_loss_tmo,
			store_fcoe_fcf_dev_loss_tmo);

static struct attribute *fcoe_ctlr_lesb_attrs[] = {
	&device_attr_fcoe_ctlr_link_fail.attr,
	&device_attr_fcoe_ctlr_vlink_fail.attr,
	&device_attr_fcoe_ctlr_miss_fka.attr,
	&device_attr_fcoe_ctlr_symb_err.attr,
	&device_attr_fcoe_ctlr_err_block.attr,
	&device_attr_fcoe_ctlr_fcs_error.attr,
	NULL,
};

static struct attribute_group fcoe_ctlr_lesb_attr_group = {
	.name = "lesb",
	.attrs = fcoe_ctlr_lesb_attrs,
};

static struct attribute *fcoe_ctlr_attrs[] = {
	&device_attr_fcoe_ctlr_fcf_dev_loss_tmo.attr,
	&device_attr_fcoe_ctlr_enabled.attr,
	&device_attr_fcoe_ctlr_mode.attr,
	NULL,
};

static struct attribute_group fcoe_ctlr_attr_group = {
	.attrs = fcoe_ctlr_attrs,
};

static const struct attribute_group *fcoe_ctlr_attr_groups[] = {
	&fcoe_ctlr_attr_group,
	&fcoe_ctlr_lesb_attr_group,
	NULL,
};

static struct attribute *fcoe_fcf_attrs[] = {
	&device_attr_fcoe_fcf_fabric_name.attr,
	&device_attr_fcoe_fcf_switch_name.attr,
	&device_attr_fcoe_fcf_dev_loss_tmo.attr,
	&device_attr_fcoe_fcf_fc_map.attr,
	&device_attr_fcoe_fcf_vfid.attr,
	&device_attr_fcoe_fcf_mac.attr,
	&device_attr_fcoe_fcf_priority.attr,
	&device_attr_fcoe_fcf_fka_period.attr,
	&device_attr_fcoe_fcf_state.attr,
	&device_attr_fcoe_fcf_selected.attr,
	&device_attr_fcoe_fcf_vlan_id.attr,
	NULL
};

static struct attribute_group fcoe_fcf_attr_group = {
	.attrs = fcoe_fcf_attrs,
};

static const struct attribute_group *fcoe_fcf_attr_groups[] = {
	&fcoe_fcf_attr_group,
	NULL,
};

static struct bus_type fcoe_bus_type;

static int fcoe_bus_match(struct device *dev,
			  struct device_driver *drv)
{
	if (dev->bus == &fcoe_bus_type)
		return 1;
	return 0;
}

/**
 * fcoe_ctlr_device_release() - Release the FIP ctlr memory
 * @dev: Pointer to the FIP ctlr's embedded device
 *
 * Called when the last FIP ctlr reference is released.
 */
static void fcoe_ctlr_device_release(struct device *dev)
{
	struct fcoe_ctlr_device *ctlr = dev_to_ctlr(dev);
	kfree(ctlr);
}

/**
 * fcoe_fcf_device_release() - Release the FIP fcf memory
 * @dev: Pointer to the fcf's embedded device
 *
 * Called when the last FIP fcf reference is released.
 */
static void fcoe_fcf_device_release(struct device *dev)
{
	struct fcoe_fcf_device *fcf = dev_to_fcf(dev);
	kfree(fcf);
}

static struct device_type fcoe_ctlr_device_type = {
	.name = "fcoe_ctlr",
	.groups = fcoe_ctlr_attr_groups,
	.release = fcoe_ctlr_device_release,
};

static struct device_type fcoe_fcf_device_type = {
	.name = "fcoe_fcf",
	.groups = fcoe_fcf_attr_groups,
	.release = fcoe_fcf_device_release,
};

static BUS_ATTR(ctlr_create, S_IWUSR, NULL, fcoe_ctlr_create_store);
static BUS_ATTR(ctlr_destroy, S_IWUSR, NULL, fcoe_ctlr_destroy_store);

static struct attribute *fcoe_bus_attrs[] = {
	&bus_attr_ctlr_create.attr,
	&bus_attr_ctlr_destroy.attr,
	NULL,
};
ATTRIBUTE_GROUPS(fcoe_bus);

static struct bus_type fcoe_bus_type = {
	.name = "fcoe",
	.match = &fcoe_bus_match,
	.bus_groups = fcoe_bus_groups,
};

/**
 * fcoe_ctlr_device_flush_work() - Flush a FIP ctlr's workqueue
 * @ctlr: Pointer to the FIP ctlr whose workqueue is to be flushed
 */
static void fcoe_ctlr_device_flush_work(struct fcoe_ctlr_device *ctlr)
{
	if (!fcoe_ctlr_work_q(ctlr)) {
		printk(KERN_ERR
		       "ERROR: FIP Ctlr '%d' attempted to flush work, "
		       "when no workqueue created.\n", ctlr->id);
		dump_stack();
		return;
	}

	flush_workqueue(fcoe_ctlr_work_q(ctlr));
}

/**
 * fcoe_ctlr_device_queue_work() - Schedule work for a FIP ctlr's workqueue
 * @ctlr: Pointer to the FIP ctlr who owns the devloss workqueue
 * @work:   Work to queue for execution
 *
 * Return value:
 *	1 on success / 0 already queued / < 0 for error
 */
static int fcoe_ctlr_device_queue_work(struct fcoe_ctlr_device *ctlr,
				       struct work_struct *work)
{
	if (unlikely(!fcoe_ctlr_work_q(ctlr))) {
		printk(KERN_ERR
		       "ERROR: FIP Ctlr '%d' attempted to queue work, "
		       "when no workqueue created.\n", ctlr->id);
		dump_stack();

		return -EINVAL;
	}

	return queue_work(fcoe_ctlr_work_q(ctlr), work);
}

/**
 * fcoe_ctlr_device_flush_devloss() - Flush a FIP ctlr's devloss workqueue
 * @ctlr: Pointer to FIP ctlr whose workqueue is to be flushed
 */
static void fcoe_ctlr_device_flush_devloss(struct fcoe_ctlr_device *ctlr)
{
	if (!fcoe_ctlr_devloss_work_q(ctlr)) {
		printk(KERN_ERR
		       "ERROR: FIP Ctlr '%d' attempted to flush work, "
		       "when no workqueue created.\n", ctlr->id);
		dump_stack();
		return;
	}

	flush_workqueue(fcoe_ctlr_devloss_work_q(ctlr));
}

/**
 * fcoe_ctlr_device_queue_devloss_work() - Schedule work for a FIP ctlr's devloss workqueue
 * @ctlr: Pointer to the FIP ctlr who owns the devloss workqueue
 * @work:   Work to queue for execution
 * @delay:  jiffies to delay the work queuing
 *
 * Return value:
 *	1 on success / 0 already queued / < 0 for error
 */
static int fcoe_ctlr_device_queue_devloss_work(struct fcoe_ctlr_device *ctlr,
					       struct delayed_work *work,
					       unsigned long delay)
{
	if (unlikely(!fcoe_ctlr_devloss_work_q(ctlr))) {
		printk(KERN_ERR
		       "ERROR: FIP Ctlr '%d' attempted to queue work, "
		       "when no workqueue created.\n", ctlr->id);
		dump_stack();

		return -EINVAL;
	}

	return queue_delayed_work(fcoe_ctlr_devloss_work_q(ctlr), work, delay);
}

static int fcoe_fcf_device_match(struct fcoe_fcf_device *new,
				 struct fcoe_fcf_device *old)
{
	if (new->switch_name == old->switch_name &&
	    new->fabric_name == old->fabric_name &&
	    new->fc_map == old->fc_map &&
	    ether_addr_equal(new->mac, old->mac))
		return 1;
	return 0;
}

/**
 * fcoe_ctlr_device_add() - Add a FIP ctlr to sysfs
 * @parent:    The parent device to which the fcoe_ctlr instance
 *             should be attached
 * @f:         The LLD's FCoE sysfs function template pointer
 * @priv_size: Size to be allocated with the fcoe_ctlr_device for the LLD
 *
 * This routine allocates a FIP ctlr object with some additional memory
 * for the LLD. The FIP ctlr is initialized, added to sysfs and then
 * attributes are added to it.
 */
struct fcoe_ctlr_device *fcoe_ctlr_device_add(struct device *parent,
				    struct fcoe_sysfs_function_template *f,
				    int priv_size)
{
	struct fcoe_ctlr_device *ctlr;
	int error = 0;

	ctlr = kzalloc(sizeof(struct fcoe_ctlr_device) + priv_size,
		       GFP_KERNEL);
	if (!ctlr)
		goto out;

	ctlr->id = atomic_inc_return(&ctlr_num) - 1;
	ctlr->f = f;
	ctlr->mode = FIP_CONN_TYPE_FABRIC;
	INIT_LIST_HEAD(&ctlr->fcfs);
	mutex_init(&ctlr->lock);
	ctlr->dev.parent = parent;
	ctlr->dev.bus = &fcoe_bus_type;
	ctlr->dev.type = &fcoe_ctlr_device_type;

	ctlr->fcf_dev_loss_tmo = fcoe_fcf_dev_loss_tmo;

	snprintf(ctlr->work_q_name, sizeof(ctlr->work_q_name),
		 "ctlr_wq_%d", ctlr->id);
	ctlr->work_q = create_singlethread_workqueue(
		ctlr->work_q_name);
	if (!ctlr->work_q)
		goto out_del;

	snprintf(ctlr->devloss_work_q_name,
		 sizeof(ctlr->devloss_work_q_name),
		 "ctlr_dl_wq_%d", ctlr->id);
	ctlr->devloss_work_q = create_singlethread_workqueue(
		ctlr->devloss_work_q_name);
	if (!ctlr->devloss_work_q)
		goto out_del_q;

	dev_set_name(&ctlr->dev, "ctlr_%d", ctlr->id);
	error = device_register(&ctlr->dev);
	if (error)
		goto out_del_q2;

	return ctlr;

out_del_q2:
	destroy_workqueue(ctlr->devloss_work_q);
	ctlr->devloss_work_q = NULL;
out_del_q:
	destroy_workqueue(ctlr->work_q);
	ctlr->work_q = NULL;
out_del:
	kfree(ctlr);
out:
	return NULL;
}
EXPORT_SYMBOL_GPL(fcoe_ctlr_device_add);

/**
 * fcoe_ctlr_device_delete() - Delete a FIP ctlr and its subtree from sysfs
 * @ctlr: A pointer to the ctlr to be deleted
 *
 * Deletes a FIP ctlr and any fcfs attached
 * to it. Deleting fcfs will cause their childen
 * to be deleted as well.
 *
 * The ctlr is detached from sysfs and it's resources
 * are freed (work q), but the memory is not freed
 * until its last reference is released.
 *
 * This routine expects no locks to be held before
 * calling.
 *
 * TODO: Currently there are no callbacks to clean up LLD data
 * for a fcoe_fcf_device. LLDs must keep this in mind as they need
 * to clean up each of their LLD data for all fcoe_fcf_device before
 * calling fcoe_ctlr_device_delete.
 */
void fcoe_ctlr_device_delete(struct fcoe_ctlr_device *ctlr)
{
	struct fcoe_fcf_device *fcf, *next;
	/* Remove any attached fcfs */
	mutex_lock(&ctlr->lock);
	list_for_each_entry_safe(fcf, next,
				 &ctlr->fcfs, peers) {
		list_del(&fcf->peers);
		fcf->state = FCOE_FCF_STATE_DELETED;
		fcoe_ctlr_device_queue_work(ctlr, &fcf->delete_work);
	}
	mutex_unlock(&ctlr->lock);

	fcoe_ctlr_device_flush_work(ctlr);

	destroy_workqueue(ctlr->devloss_work_q);
	ctlr->devloss_work_q = NULL;
	destroy_workqueue(ctlr->work_q);
	ctlr->work_q = NULL;

	device_unregister(&ctlr->dev);
}
EXPORT_SYMBOL_GPL(fcoe_ctlr_device_delete);

/**
 * fcoe_fcf_device_final_delete() - Final delete routine
 * @work: The FIP fcf's embedded work struct
 *
 * It is expected that the fcf has been removed from
 * the FIP ctlr's list before calling this routine.
 */
static void fcoe_fcf_device_final_delete(struct work_struct *work)
{
	struct fcoe_fcf_device *fcf =
		container_of(work, struct fcoe_fcf_device, delete_work);
	struct fcoe_ctlr_device *ctlr = fcoe_fcf_dev_to_ctlr_dev(fcf);

	/*
	 * Cancel any outstanding timers. These should really exist
	 * only when rmmod'ing the LLDD and we're asking for
	 * immediate termination of the rports
	 */
	if (!cancel_delayed_work(&fcf->dev_loss_work))
		fcoe_ctlr_device_flush_devloss(ctlr);

	device_unregister(&fcf->dev);
}

/**
 * fip_timeout_deleted_fcf() - Delete a fcf when the devloss timer fires
 * @work: The FIP fcf's embedded work struct
 *
 * Removes the fcf from the FIP ctlr's list of fcfs and
 * queues the final deletion.
 */
static void fip_timeout_deleted_fcf(struct work_struct *work)
{
	struct fcoe_fcf_device *fcf =
		container_of(work, struct fcoe_fcf_device, dev_loss_work.work);
	struct fcoe_ctlr_device *ctlr = fcoe_fcf_dev_to_ctlr_dev(fcf);

	mutex_lock(&ctlr->lock);

	/*
	 * If the fcf is deleted or reconnected before the timer
	 * fires the devloss queue will be flushed, but the state will
	 * either be CONNECTED or DELETED. If that is the case we
	 * cancel deleting the fcf.
	 */
	if (fcf->state != FCOE_FCF_STATE_DISCONNECTED)
		goto out;

	dev_printk(KERN_ERR, &fcf->dev,
		   "FIP fcf connection time out: removing fcf\n");

	list_del(&fcf->peers);
	fcf->state = FCOE_FCF_STATE_DELETED;
	fcoe_ctlr_device_queue_work(ctlr, &fcf->delete_work);

out:
	mutex_unlock(&ctlr->lock);
}

/**
 * fcoe_fcf_device_delete() - Delete a FIP fcf
 * @fcf: Pointer to the fcf which is to be deleted
 *
 * Queues the FIP fcf on the devloss workqueue
 *
 * Expects the ctlr_attrs mutex to be held for fcf
 * state change.
 */
void fcoe_fcf_device_delete(struct fcoe_fcf_device *fcf)
{
	struct fcoe_ctlr_device *ctlr = fcoe_fcf_dev_to_ctlr_dev(fcf);
	int timeout = fcf->dev_loss_tmo;

	if (fcf->state != FCOE_FCF_STATE_CONNECTED)
		return;

	fcf->state = FCOE_FCF_STATE_DISCONNECTED;

	/*
	 * FCF will only be re-connected by the LLD calling
	 * fcoe_fcf_device_add, and it should be setting up
	 * priv then.
	 */
	fcf->priv = NULL;

	fcoe_ctlr_device_queue_devloss_work(ctlr, &fcf->dev_loss_work,
					   timeout * HZ);
}
EXPORT_SYMBOL_GPL(fcoe_fcf_device_delete);

/**
 * fcoe_fcf_device_add() - Add a FCoE sysfs fcoe_fcf_device to the system
 * @ctlr:    The fcoe_ctlr_device that will be the fcoe_fcf_device parent
 * @new_fcf: A temporary FCF used for lookups on the current list of fcfs
 *
 * Expects to be called with the ctlr->lock held
 */
struct fcoe_fcf_device *fcoe_fcf_device_add(struct fcoe_ctlr_device *ctlr,
					    struct fcoe_fcf_device *new_fcf)
{
	struct fcoe_fcf_device *fcf;
	int error = 0;

	list_for_each_entry(fcf, &ctlr->fcfs, peers) {
		if (fcoe_fcf_device_match(new_fcf, fcf)) {
			if (fcf->state == FCOE_FCF_STATE_CONNECTED)
				return fcf;

			fcf->state = FCOE_FCF_STATE_CONNECTED;

			if (!cancel_delayed_work(&fcf->dev_loss_work))
				fcoe_ctlr_device_flush_devloss(ctlr);

			return fcf;
		}
	}

	fcf = kzalloc(sizeof(struct fcoe_fcf_device), GFP_ATOMIC);
	if (unlikely(!fcf))
		goto out;

	INIT_WORK(&fcf->delete_work, fcoe_fcf_device_final_delete);
	INIT_DELAYED_WORK(&fcf->dev_loss_work, fip_timeout_deleted_fcf);

	fcf->dev.parent = &ctlr->dev;
	fcf->dev.bus = &fcoe_bus_type;
	fcf->dev.type = &fcoe_fcf_device_type;
	fcf->id = atomic_inc_return(&fcf_num) - 1;
	fcf->state = FCOE_FCF_STATE_UNKNOWN;

	fcf->dev_loss_tmo = ctlr->fcf_dev_loss_tmo;

	dev_set_name(&fcf->dev, "fcf_%d", fcf->id);

	fcf->fabric_name = new_fcf->fabric_name;
	fcf->switch_name = new_fcf->switch_name;
	fcf->fc_map = new_fcf->fc_map;
	fcf->vfid = new_fcf->vfid;
	memcpy(fcf->mac, new_fcf->mac, ETH_ALEN);
	fcf->priority = new_fcf->priority;
	fcf->fka_period = new_fcf->fka_period;
	fcf->selected = new_fcf->selected;

	error = device_register(&fcf->dev);
	if (error)
		goto out_del;

	fcf->state = FCOE_FCF_STATE_CONNECTED;
	list_add_tail(&fcf->peers, &ctlr->fcfs);

	return fcf;

out_del:
	kfree(fcf);
out:
	return NULL;
}
EXPORT_SYMBOL_GPL(fcoe_fcf_device_add);

int __init fcoe_sysfs_setup(void)
{
	int error;

	atomic_set(&ctlr_num, 0);
	atomic_set(&fcf_num, 0);

	error = bus_register(&fcoe_bus_type);
	if (error)
		return error;

	return 0;
}

void __exit fcoe_sysfs_teardown(void)
{
	bus_unregister(&fcoe_bus_type);
}