summaryrefslogtreecommitdiffstats
path: root/fs/f2fs/sysfs.c
blob: f33a56d6e6dd7916feee0206bfadce16f873dc78 (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
/*
 * f2fs sysfs interface
 *
 * Copyright (c) 2012 Samsung Electronics Co., Ltd.
 *             http://www.samsung.com/
 * Copyright (c) 2017 Chao Yu <chao@kernel.org>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.
 */
#include <linux/proc_fs.h>
#include <linux/f2fs_fs.h>
#include <linux/seq_file.h>

#include "f2fs.h"
#include "segment.h"
#include "gc.h"

static struct proc_dir_entry *f2fs_proc_root;

/* Sysfs support for f2fs */
enum {
	GC_THREAD,	/* struct f2fs_gc_thread */
	SM_INFO,	/* struct f2fs_sm_info */
	DCC_INFO,	/* struct discard_cmd_control */
	NM_INFO,	/* struct f2fs_nm_info */
	F2FS_SBI,	/* struct f2fs_sb_info */
#ifdef CONFIG_F2FS_FAULT_INJECTION
	FAULT_INFO_RATE,	/* struct f2fs_fault_info */
	FAULT_INFO_TYPE,	/* struct f2fs_fault_info */
#endif
	RESERVED_BLOCKS,	/* struct f2fs_sb_info */
};

struct f2fs_attr {
	struct attribute attr;
	ssize_t (*show)(struct f2fs_attr *, struct f2fs_sb_info *, char *);
	ssize_t (*store)(struct f2fs_attr *, struct f2fs_sb_info *,
			 const char *, size_t);
	int struct_type;
	int offset;
	int id;
};

static unsigned char *__struct_ptr(struct f2fs_sb_info *sbi, int struct_type)
{
	if (struct_type == GC_THREAD)
		return (unsigned char *)sbi->gc_thread;
	else if (struct_type == SM_INFO)
		return (unsigned char *)SM_I(sbi);
	else if (struct_type == DCC_INFO)
		return (unsigned char *)SM_I(sbi)->dcc_info;
	else if (struct_type == NM_INFO)
		return (unsigned char *)NM_I(sbi);
	else if (struct_type == F2FS_SBI || struct_type == RESERVED_BLOCKS)
		return (unsigned char *)sbi;
#ifdef CONFIG_F2FS_FAULT_INJECTION
	else if (struct_type == FAULT_INFO_RATE ||
					struct_type == FAULT_INFO_TYPE)
		return (unsigned char *)&F2FS_OPTION(sbi).fault_info;
#endif
	return NULL;
}

static ssize_t dirty_segments_show(struct f2fs_attr *a,
		struct f2fs_sb_info *sbi, char *buf)
{
	return snprintf(buf, PAGE_SIZE, "%llu\n",
		(unsigned long long)(dirty_segments(sbi)));
}

static ssize_t lifetime_write_kbytes_show(struct f2fs_attr *a,
		struct f2fs_sb_info *sbi, char *buf)
{
	struct super_block *sb = sbi->sb;

	if (!sb->s_bdev->bd_part)
		return snprintf(buf, PAGE_SIZE, "0\n");

	return snprintf(buf, PAGE_SIZE, "%llu\n",
		(unsigned long long)(sbi->kbytes_written +
			BD_PART_WRITTEN(sbi)));
}

static ssize_t features_show(struct f2fs_attr *a,
		struct f2fs_sb_info *sbi, char *buf)
{
	struct super_block *sb = sbi->sb;
	int len = 0;

	if (!sb->s_bdev->bd_part)
		return snprintf(buf, PAGE_SIZE, "0\n");

	if (f2fs_sb_has_encrypt(sb))
		len += snprintf(buf, PAGE_SIZE - len, "%s",
						"encryption");
	if (f2fs_sb_has_blkzoned(sb))
		len += snprintf(buf + len, PAGE_SIZE - len, "%s%s",
				len ? ", " : "", "blkzoned");
	if (f2fs_sb_has_extra_attr(sb))
		len += snprintf(buf + len, PAGE_SIZE - len, "%s%s",
				len ? ", " : "", "extra_attr");
	if (f2fs_sb_has_project_quota(sb))
		len += snprintf(buf + len, PAGE_SIZE - len, "%s%s",
				len ? ", " : "", "projquota");
	if (f2fs_sb_has_inode_chksum(sb))
		len += snprintf(buf + len, PAGE_SIZE - len, "%s%s",
				len ? ", " : "", "inode_checksum");
	if (f2fs_sb_has_flexible_inline_xattr(sb))
		len += snprintf(buf + len, PAGE_SIZE - len, "%s%s",
				len ? ", " : "", "flexible_inline_xattr");
	if (f2fs_sb_has_quota_ino(sb))
		len += snprintf(buf + len, PAGE_SIZE - len, "%s%s",
				len ? ", " : "", "quota_ino");
	if (f2fs_sb_has_inode_crtime(sb))
		len += snprintf(buf + len, PAGE_SIZE - len, "%s%s",
				len ? ", " : "", "inode_crtime");
	if (f2fs_sb_has_lost_found(sb))
		len += snprintf(buf + len, PAGE_SIZE - len, "%s%s",
				len ? ", " : "", "lost_found");
	len += snprintf(buf + len, PAGE_SIZE - len, "\n");
	return len;
}

static ssize_t current_reserved_blocks_show(struct f2fs_attr *a,
					struct f2fs_sb_info *sbi, char *buf)
{
	return snprintf(buf, PAGE_SIZE, "%u\n", sbi->current_reserved_blocks);
}

static ssize_t f2fs_sbi_show(struct f2fs_attr *a,
			struct f2fs_sb_info *sbi, char *buf)
{
	unsigned char *ptr = NULL;
	unsigned int *ui;

	ptr = __struct_ptr(sbi, a->struct_type);
	if (!ptr)
		return -EINVAL;

	if (!strcmp(a->attr.name, "extension_list")) {
		__u8 (*extlist)[F2FS_EXTENSION_LEN] =
					sbi->raw_super->extension_list;
		int cold_count = le32_to_cpu(sbi->raw_super->extension_count);
		int hot_count = sbi->raw_super->hot_ext_count;
		int len = 0, i;

		len += snprintf(buf + len, PAGE_SIZE - len,
						"cold file extenstion:\n");
		for (i = 0; i < cold_count; i++)
			len += snprintf(buf + len, PAGE_SIZE - len, "%s\n",
								extlist[i]);

		len += snprintf(buf + len, PAGE_SIZE - len,
						"hot file extenstion:\n");
		for (i = cold_count; i < cold_count + hot_count; i++)
			len += snprintf(buf + len, PAGE_SIZE - len, "%s\n",
								extlist[i]);
		return len;
	}

	ui = (unsigned int *)(ptr + a->offset);

	return snprintf(buf, PAGE_SIZE, "%u\n", *ui);
}

static ssize_t f2fs_sbi_store(struct f2fs_attr *a,
			struct f2fs_sb_info *sbi,
			const char *buf, size_t count)
{
	unsigned char *ptr;
	unsigned long t;
	unsigned int *ui;
	ssize_t ret;

	ptr = __struct_ptr(sbi, a->struct_type);
	if (!ptr)
		return -EINVAL;

	if (!strcmp(a->attr.name, "extension_list")) {
		const char *name = strim((char *)buf);
		bool set = true, hot;

		if (!strncmp(name, "[h]", 3))
			hot = true;
		else if (!strncmp(name, "[c]", 3))
			hot = false;
		else
			return -EINVAL;

		name += 3;

		if (*name == '!') {
			name++;
			set = false;
		}

		if (strlen(name) >= F2FS_EXTENSION_LEN)
			return -EINVAL;

		down_write(&sbi->sb_lock);

		ret = update_extension_list(sbi, name, hot, set);
		if (ret)
			goto out;

		ret = f2fs_commit_super(sbi, false);
		if (ret)
			update_extension_list(sbi, name, hot, !set);
out:
		up_write(&sbi->sb_lock);
		return ret ? ret : count;
	}

	ui = (unsigned int *)(ptr + a->offset);

	ret = kstrtoul(skip_spaces(buf), 0, &t);
	if (ret < 0)
		return ret;
#ifdef CONFIG_F2FS_FAULT_INJECTION
	if (a->struct_type == FAULT_INFO_TYPE && t >= (1 << FAULT_MAX))
		return -EINVAL;
#endif
	if (a->struct_type == RESERVED_BLOCKS) {
		spin_lock(&sbi->stat_lock);
		if (t > (unsigned long)(sbi->user_block_count -
				F2FS_OPTION(sbi).root_reserved_blocks)) {
			spin_unlock(&sbi->stat_lock);
			return -EINVAL;
		}
		*ui = t;
		sbi->current_reserved_blocks = min(sbi->reserved_blocks,
				sbi->user_block_count - valid_user_blocks(sbi));
		spin_unlock(&sbi->stat_lock);
		return count;
	}

	if (!strcmp(a->attr.name, "discard_granularity")) {
		if (t == 0 || t > MAX_PLIST_NUM)
			return -EINVAL;
		if (t == *ui)
			return count;
		*ui = t;
		return count;
	}

	*ui = t;

	if (!strcmp(a->attr.name, "iostat_enable") && *ui == 0)
		f2fs_reset_iostat(sbi);
	if (!strcmp(a->attr.name, "gc_urgent") && t == 1 && sbi->gc_thread) {
		sbi->gc_thread->gc_wake = 1;
		wake_up_interruptible_all(&sbi->gc_thread->gc_wait_queue_head);
		wake_up_discard_thread(sbi, true);
	}

	return count;
}

static ssize_t f2fs_attr_show(struct kobject *kobj,
				struct attribute *attr, char *buf)
{
	struct f2fs_sb_info *sbi = container_of(kobj, struct f2fs_sb_info,
								s_kobj);
	struct f2fs_attr *a = container_of(attr, struct f2fs_attr, attr);

	return a->show ? a->show(a, sbi, buf) : 0;
}

static ssize_t f2fs_attr_store(struct kobject *kobj, struct attribute *attr,
						const char *buf, size_t len)
{
	struct f2fs_sb_info *sbi = container_of(kobj, struct f2fs_sb_info,
									s_kobj);
	struct f2fs_attr *a = container_of(attr, struct f2fs_attr, attr);

	return a->store ? a->store(a, sbi, buf, len) : 0;
}

static void f2fs_sb_release(struct kobject *kobj)
{
	struct f2fs_sb_info *sbi = container_of(kobj, struct f2fs_sb_info,
								s_kobj);
	complete(&sbi->s_kobj_unregister);
}

enum feat_id {
	FEAT_CRYPTO = 0,
	FEAT_BLKZONED,
	FEAT_ATOMIC_WRITE,
	FEAT_EXTRA_ATTR,
	FEAT_PROJECT_QUOTA,
	FEAT_INODE_CHECKSUM,
	FEAT_FLEXIBLE_INLINE_XATTR,
	FEAT_QUOTA_INO,
	FEAT_INODE_CRTIME,
	FEAT_LOST_FOUND,
};

static ssize_t f2fs_feature_show(struct f2fs_attr *a,
		struct f2fs_sb_info *sbi, char *buf)
{
	switch (a->id) {
	case FEAT_CRYPTO:
	case FEAT_BLKZONED:
	case FEAT_ATOMIC_WRITE:
	case FEAT_EXTRA_ATTR:
	case FEAT_PROJECT_QUOTA:
	case FEAT_INODE_CHECKSUM:
	case FEAT_FLEXIBLE_INLINE_XATTR:
	case FEAT_QUOTA_INO:
	case FEAT_INODE_CRTIME:
	case FEAT_LOST_FOUND:
		return snprintf(buf, PAGE_SIZE, "supported\n");
	}
	return 0;
}

#define F2FS_ATTR_OFFSET(_struct_type, _name, _mode, _show, _store, _offset) \
static struct f2fs_attr f2fs_attr_##_name = {			\
	.attr = {.name = __stringify(_name), .mode = _mode },	\
	.show	= _show,					\
	.store	= _store,					\
	.struct_type = _struct_type,				\
	.offset = _offset					\
}

#define F2FS_RW_ATTR(struct_type, struct_name, name, elname)	\
	F2FS_ATTR_OFFSET(struct_type, name, 0644,		\
		f2fs_sbi_show, f2fs_sbi_store,			\
		offsetof(struct struct_name, elname))

#define F2FS_GENERAL_RO_ATTR(name) \
static struct f2fs_attr f2fs_attr_##name = __ATTR(name, 0444, name##_show, NULL)

#define F2FS_FEATURE_RO_ATTR(_name, _id)			\
static struct f2fs_attr f2fs_attr_##_name = {			\
	.attr = {.name = __stringify(_name), .mode = 0444 },	\
	.show	= f2fs_feature_show,				\
	.id	= _id,						\
}

F2FS_RW_ATTR(GC_THREAD, f2fs_gc_kthread, gc_urgent_sleep_time,
							urgent_sleep_time);
F2FS_RW_ATTR(GC_THREAD, f2fs_gc_kthread, gc_min_sleep_time, min_sleep_time);
F2FS_RW_ATTR(GC_THREAD, f2fs_gc_kthread, gc_max_sleep_time, max_sleep_time);
F2FS_RW_ATTR(GC_THREAD, f2fs_gc_kthread, gc_no_gc_sleep_time, no_gc_sleep_time);
F2FS_RW_ATTR(GC_THREAD, f2fs_gc_kthread, gc_idle, gc_idle);
F2FS_RW_ATTR(GC_THREAD, f2fs_gc_kthread, gc_urgent, gc_urgent);
F2FS_RW_ATTR(SM_INFO, f2fs_sm_info, reclaim_segments, rec_prefree_segments);
F2FS_RW_ATTR(DCC_INFO, discard_cmd_control, max_small_discards, max_discards);
F2FS_RW_ATTR(DCC_INFO, discard_cmd_control, discard_granularity, discard_granularity);
F2FS_RW_ATTR(RESERVED_BLOCKS, f2fs_sb_info, reserved_blocks, reserved_blocks);
F2FS_RW_ATTR(SM_INFO, f2fs_sm_info, batched_trim_sections, trim_sections);
F2FS_RW_ATTR(SM_INFO, f2fs_sm_info, ipu_policy, ipu_policy);
F2FS_RW_ATTR(SM_INFO, f2fs_sm_info, min_ipu_util, min_ipu_util);
F2FS_RW_ATTR(SM_INFO, f2fs_sm_info, min_fsync_blocks, min_fsync_blocks);
F2FS_RW_ATTR(SM_INFO, f2fs_sm_info, min_hot_blocks, min_hot_blocks);
F2FS_RW_ATTR(SM_INFO, f2fs_sm_info, min_ssr_sections, min_ssr_sections);
F2FS_RW_ATTR(NM_INFO, f2fs_nm_info, ram_thresh, ram_thresh);
F2FS_RW_ATTR(NM_INFO, f2fs_nm_info, ra_nid_pages, ra_nid_pages);
F2FS_RW_ATTR(NM_INFO, f2fs_nm_info, dirty_nats_ratio, dirty_nats_ratio);
F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, max_victim_search, max_victim_search);
F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, dir_level, dir_level);
F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, cp_interval, interval_time[CP_TIME]);
F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, idle_interval, interval_time[REQ_TIME]);
F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, iostat_enable, iostat_enable);
F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, readdir_ra, readdir_ra);
F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, gc_pin_file_thresh, gc_pin_file_threshold);
F2FS_RW_ATTR(F2FS_SBI, f2fs_super_block, extension_list, extension_list);
#ifdef CONFIG_F2FS_FAULT_INJECTION
F2FS_RW_ATTR(FAULT_INFO_RATE, f2fs_fault_info, inject_rate, inject_rate);
F2FS_RW_ATTR(FAULT_INFO_TYPE, f2fs_fault_info, inject_type, inject_type);
#endif
F2FS_GENERAL_RO_ATTR(dirty_segments);
F2FS_GENERAL_RO_ATTR(lifetime_write_kbytes);
F2FS_GENERAL_RO_ATTR(features);
F2FS_GENERAL_RO_ATTR(current_reserved_blocks);

#ifdef CONFIG_F2FS_FS_ENCRYPTION
F2FS_FEATURE_RO_ATTR(encryption, FEAT_CRYPTO);
#endif
#ifdef CONFIG_BLK_DEV_ZONED
F2FS_FEATURE_RO_ATTR(block_zoned, FEAT_BLKZONED);
#endif
F2FS_FEATURE_RO_ATTR(atomic_write, FEAT_ATOMIC_WRITE);
F2FS_FEATURE_RO_ATTR(extra_attr, FEAT_EXTRA_ATTR);
F2FS_FEATURE_RO_ATTR(project_quota, FEAT_PROJECT_QUOTA);
F2FS_FEATURE_RO_ATTR(inode_checksum, FEAT_INODE_CHECKSUM);
F2FS_FEATURE_RO_ATTR(flexible_inline_xattr, FEAT_FLEXIBLE_INLINE_XATTR);
F2FS_FEATURE_RO_ATTR(quota_ino, FEAT_QUOTA_INO);
F2FS_FEATURE_RO_ATTR(inode_crtime, FEAT_INODE_CRTIME);
F2FS_FEATURE_RO_ATTR(lost_found, FEAT_LOST_FOUND);

#define ATTR_LIST(name) (&f2fs_attr_##name.attr)
static struct attribute *f2fs_attrs[] = {
	ATTR_LIST(gc_urgent_sleep_time),
	ATTR_LIST(gc_min_sleep_time),
	ATTR_LIST(gc_max_sleep_time),
	ATTR_LIST(gc_no_gc_sleep_time),
	ATTR_LIST(gc_idle),
	ATTR_LIST(gc_urgent),
	ATTR_LIST(reclaim_segments),
	ATTR_LIST(max_small_discards),
	ATTR_LIST(discard_granularity),
	ATTR_LIST(batched_trim_sections),
	ATTR_LIST(ipu_policy),
	ATTR_LIST(min_ipu_util),
	ATTR_LIST(min_fsync_blocks),
	ATTR_LIST(min_hot_blocks),
	ATTR_LIST(min_ssr_sections),
	ATTR_LIST(max_victim_search),
	ATTR_LIST(dir_level),
	ATTR_LIST(ram_thresh),
	ATTR_LIST(ra_nid_pages),
	ATTR_LIST(dirty_nats_ratio),
	ATTR_LIST(cp_interval),
	ATTR_LIST(idle_interval),
	ATTR_LIST(iostat_enable),
	ATTR_LIST(readdir_ra),
	ATTR_LIST(gc_pin_file_thresh),
	ATTR_LIST(extension_list),
#ifdef CONFIG_F2FS_FAULT_INJECTION
	ATTR_LIST(inject_rate),
	ATTR_LIST(inject_type),
#endif
	ATTR_LIST(dirty_segments),
	ATTR_LIST(lifetime_write_kbytes),
	ATTR_LIST(features),
	ATTR_LIST(reserved_blocks),
	ATTR_LIST(current_reserved_blocks),
	NULL,
};

static struct attribute *f2fs_feat_attrs[] = {
#ifdef CONFIG_F2FS_FS_ENCRYPTION
	ATTR_LIST(encryption),
#endif
#ifdef CONFIG_BLK_DEV_ZONED
	ATTR_LIST(block_zoned),
#endif
	ATTR_LIST(atomic_write),
	ATTR_LIST(extra_attr),
	ATTR_LIST(project_quota),
	ATTR_LIST(inode_checksum),
	ATTR_LIST(flexible_inline_xattr),
	ATTR_LIST(quota_ino),
	ATTR_LIST(inode_crtime),
	ATTR_LIST(lost_found),
	NULL,
};

static const struct sysfs_ops f2fs_attr_ops = {
	.show	= f2fs_attr_show,
	.store	= f2fs_attr_store,
};

static struct kobj_type f2fs_sb_ktype = {
	.default_attrs	= f2fs_attrs,
	.sysfs_ops	= &f2fs_attr_ops,
	.release	= f2fs_sb_release,
};

static struct kobj_type f2fs_ktype = {
	.sysfs_ops	= &f2fs_attr_ops,
};

static struct kset f2fs_kset = {
	.kobj   = {.ktype = &f2fs_ktype},
};

static struct kobj_type f2fs_feat_ktype = {
	.default_attrs	= f2fs_feat_attrs,
	.sysfs_ops	= &f2fs_attr_ops,
};

static struct kobject f2fs_feat = {
	.kset	= &f2fs_kset,
};

static int segment_info_seq_show(struct seq_file *seq, void *offset)
{
	struct super_block *sb = seq->private;
	struct f2fs_sb_info *sbi = F2FS_SB(sb);
	unsigned int total_segs =
			le32_to_cpu(sbi->raw_super->segment_count_main);
	int i;

	seq_puts(seq, "format: segment_type|valid_blocks\n"
		"segment_type(0:HD, 1:WD, 2:CD, 3:HN, 4:WN, 5:CN)\n");

	for (i = 0; i < total_segs; i++) {
		struct seg_entry *se = get_seg_entry(sbi, i);

		if ((i % 10) == 0)
			seq_printf(seq, "%-10d", i);
		seq_printf(seq, "%d|%-3u", se->type,
					get_valid_blocks(sbi, i, false));
		if ((i % 10) == 9 || i == (total_segs - 1))
			seq_putc(seq, '\n');
		else
			seq_putc(seq, ' ');
	}

	return 0;
}

static int segment_bits_seq_show(struct seq_file *seq, void *offset)
{
	struct super_block *sb = seq->private;
	struct f2fs_sb_info *sbi = F2FS_SB(sb);
	unsigned int total_segs =
			le32_to_cpu(sbi->raw_super->segment_count_main);
	int i, j;

	seq_puts(seq, "format: segment_type|valid_blocks|bitmaps\n"
		"segment_type(0:HD, 1:WD, 2:CD, 3:HN, 4:WN, 5:CN)\n");

	for (i = 0; i < total_segs; i++) {
		struct seg_entry *se = get_seg_entry(sbi, i);

		seq_printf(seq, "%-10d", i);
		seq_printf(seq, "%d|%-3u|", se->type,
					get_valid_blocks(sbi, i, false));
		for (j = 0; j < SIT_VBLOCK_MAP_SIZE; j++)
			seq_printf(seq, " %.2x", se->cur_valid_map[j]);
		seq_putc(seq, '\n');
	}
	return 0;
}

static int iostat_info_seq_show(struct seq_file *seq, void *offset)
{
	struct super_block *sb = seq->private;
	struct f2fs_sb_info *sbi = F2FS_SB(sb);
	time64_t now = ktime_get_real_seconds();

	if (!sbi->iostat_enable)
		return 0;

	seq_printf(seq, "time:		%-16llu\n", now);

	/* print app IOs */
	seq_printf(seq, "app buffered:	%-16llu\n",
				sbi->write_iostat[APP_BUFFERED_IO]);
	seq_printf(seq, "app direct:	%-16llu\n",
				sbi->write_iostat[APP_DIRECT_IO]);
	seq_printf(seq, "app mapped:	%-16llu\n",
				sbi->write_iostat[APP_MAPPED_IO]);

	/* print fs IOs */
	seq_printf(seq, "fs data:	%-16llu\n",
				sbi->write_iostat[FS_DATA_IO]);
	seq_printf(seq, "fs node:	%-16llu\n",
				sbi->write_iostat[FS_NODE_IO]);
	seq_printf(seq, "fs meta:	%-16llu\n",
				sbi->write_iostat[FS_META_IO]);
	seq_printf(seq, "fs gc data:	%-16llu\n",
				sbi->write_iostat[FS_GC_DATA_IO]);
	seq_printf(seq, "fs gc node:	%-16llu\n",
				sbi->write_iostat[FS_GC_NODE_IO]);
	seq_printf(seq, "fs cp data:	%-16llu\n",
				sbi->write_iostat[FS_CP_DATA_IO]);
	seq_printf(seq, "fs cp node:	%-16llu\n",
				sbi->write_iostat[FS_CP_NODE_IO]);
	seq_printf(seq, "fs cp meta:	%-16llu\n",
				sbi->write_iostat[FS_CP_META_IO]);
	seq_printf(seq, "fs discard:	%-16llu\n",
				sbi->write_iostat[FS_DISCARD]);

	return 0;
}

#define F2FS_PROC_FILE_DEF(_name)					\
static int _name##_open_fs(struct inode *inode, struct file *file)	\
{									\
	return single_open(file, _name##_seq_show, PDE_DATA(inode));	\
}									\
									\
static const struct file_operations f2fs_seq_##_name##_fops = {		\
	.open = _name##_open_fs,					\
	.read = seq_read,						\
	.llseek = seq_lseek,						\
	.release = single_release,					\
};

F2FS_PROC_FILE_DEF(segment_info);
F2FS_PROC_FILE_DEF(segment_bits);
F2FS_PROC_FILE_DEF(iostat_info);

int __init f2fs_init_sysfs(void)
{
	int ret;

	kobject_set_name(&f2fs_kset.kobj, "f2fs");
	f2fs_kset.kobj.parent = fs_kobj;
	ret = kset_register(&f2fs_kset);
	if (ret)
		return ret;

	ret = kobject_init_and_add(&f2fs_feat, &f2fs_feat_ktype,
				   NULL, "features");
	if (ret)
		kset_unregister(&f2fs_kset);
	else
		f2fs_proc_root = proc_mkdir("fs/f2fs", NULL);
	return ret;
}

void f2fs_exit_sysfs(void)
{
	kobject_put(&f2fs_feat);
	kset_unregister(&f2fs_kset);
	remove_proc_entry("fs/f2fs", NULL);
	f2fs_proc_root = NULL;
}

int f2fs_register_sysfs(struct f2fs_sb_info *sbi)
{
	struct super_block *sb = sbi->sb;
	int err;

	sbi->s_kobj.kset = &f2fs_kset;
	init_completion(&sbi->s_kobj_unregister);
	err = kobject_init_and_add(&sbi->s_kobj, &f2fs_sb_ktype, NULL,
				"%s", sb->s_id);
	if (err)
		return err;

	if (f2fs_proc_root)
		sbi->s_proc = proc_mkdir(sb->s_id, f2fs_proc_root);

	if (sbi->s_proc) {
		proc_create_data("segment_info", S_IRUGO, sbi->s_proc,
				 &f2fs_seq_segment_info_fops, sb);
		proc_create_data("segment_bits", S_IRUGO, sbi->s_proc,
				 &f2fs_seq_segment_bits_fops, sb);
		proc_create_data("iostat_info", S_IRUGO, sbi->s_proc,
				&f2fs_seq_iostat_info_fops, sb);
	}
	return 0;
}

void f2fs_unregister_sysfs(struct f2fs_sb_info *sbi)
{
	if (sbi->s_proc) {
		remove_proc_entry("iostat_info", sbi->s_proc);
		remove_proc_entry("segment_info", sbi->s_proc);
		remove_proc_entry("segment_bits", sbi->s_proc);
		remove_proc_entry(sbi->sb->s_id, f2fs_proc_root);
	}
	kobject_del(&sbi->s_kobj);
}