[mirror_ubuntu-bionic-kernel.git] / fs / f2fs / sysfs.c

/*
 * 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_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 *)&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_crypto(sb))
		len += snprintf(buf, PAGE_SIZE - len, "%s",
						"encryption");
	if (f2fs_sb_mounted_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");
	len += snprintf(buf + len, PAGE_SIZE - len, "\n");
	return len;
}

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;

	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;

	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 ((unsigned long)sbi->total_valid_block_count + t >
				(unsigned long)sbi->user_block_count) {
			spin_unlock(&sbi->stat_lock);
			return -EINVAL;
		}
		*ui = t;
		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,
};

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:
		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(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);
#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);

#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);

#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(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),
#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),
	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),
	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);
}
Commit	Line	Data
8ceffcb2 CY	1	/*
	2	* f2fs sysfs interface
	3	*
	4	* Copyright (c) 2012 Samsung Electronics Co., Ltd.
	5	* http://www.samsung.com/
	6	* Copyright (c) 2017 Chao Yu <chao@kernel.org>
	7	*
	8	* This program is free software; you can redistribute it and/or modify
	9	* it under the terms of the GNU General Public License version 2 as
	10	* published by the Free Software Foundation.
	11	*/
	12	#include <linux/proc_fs.h>
	13	#include <linux/f2fs_fs.h>
299aa41a	14	#include <linux/seq_file.h>
8ceffcb2 CY	15
	16	#include "f2fs.h"
	17	#include "segment.h"
	18	#include "gc.h"
	19
	20	static struct proc_dir_entry *f2fs_proc_root;
8ceffcb2 CY	21
	22	/* Sysfs support for f2fs */
	23	enum {
	24	GC_THREAD, /* struct f2fs_gc_thread */
	25	SM_INFO, /* struct f2fs_sm_info */
	26	DCC_INFO, /* struct discard_cmd_control */
	27	NM_INFO, /* struct f2fs_nm_info */
	28	F2FS_SBI, /* struct f2fs_sb_info */
	29	#ifdef CONFIG_F2FS_FAULT_INJECTION
	30	FAULT_INFO_RATE, /* struct f2fs_fault_info */
	31	FAULT_INFO_TYPE, /* struct f2fs_fault_info */
	32	#endif
daeb433e	33	RESERVED_BLOCKS,
8ceffcb2 CY	34	};
	35
	36	struct f2fs_attr {
	37	struct attribute attr;
	38	ssize_t (show)(struct f2fs_attr , struct f2fs_sb_info , char );
	39	ssize_t (store)(struct f2fs_attr , struct f2fs_sb_info *,
	40	const char *, size_t);
	41	int struct_type;
	42	int offset;
bf9e697e	43	int id;
8ceffcb2 CY	44	};
	45
	46	static unsigned char __struct_ptr(struct f2fs_sb_info sbi, int struct_type)
	47	{
	48	if (struct_type == GC_THREAD)
	49	return (unsigned char *)sbi->gc_thread;
	50	else if (struct_type == SM_INFO)
	51	return (unsigned char *)SM_I(sbi);
	52	else if (struct_type == DCC_INFO)
	53	return (unsigned char *)SM_I(sbi)->dcc_info;
	54	else if (struct_type == NM_INFO)
	55	return (unsigned char *)NM_I(sbi);
daeb433e	56	else if (struct_type == F2FS_SBI \|\| struct_type == RESERVED_BLOCKS)
8ceffcb2 CY	57	return (unsigned char *)sbi;
	58	#ifdef CONFIG_F2FS_FAULT_INJECTION
	59	else if (struct_type == FAULT_INFO_RATE \|\|
	60	struct_type == FAULT_INFO_TYPE)
	61	return (unsigned char *)&sbi->fault_info;
	62	#endif
	63	return NULL;
	64	}
	65
8f1572f7 JK	66	static ssize_t dirty_segments_show(struct f2fs_attr *a,
	67	struct f2fs_sb_info sbi, char buf)
	68	{
	69	return snprintf(buf, PAGE_SIZE, "%llu\n",
	70	(unsigned long long)(dirty_segments(sbi)));
	71	}
	72
8ceffcb2 CY	73	static ssize_t lifetime_write_kbytes_show(struct f2fs_attr *a,
	74	struct f2fs_sb_info sbi, char buf)
	75	{
	76	struct super_block *sb = sbi->sb;
	77
	78	if (!sb->s_bdev->bd_part)
	79	return snprintf(buf, PAGE_SIZE, "0\n");
	80
	81	return snprintf(buf, PAGE_SIZE, "%llu\n",
	82	(unsigned long long)(sbi->kbytes_written +
	83	BD_PART_WRITTEN(sbi)));
	84	}
	85
bf9e697e JK	86	static ssize_t features_show(struct f2fs_attr *a,
	87	struct f2fs_sb_info sbi, char buf)
	88	{
	89	struct super_block *sb = sbi->sb;
	90	int len = 0;
	91
	92	if (!sb->s_bdev->bd_part)
	93	return snprintf(buf, PAGE_SIZE, "0\n");
	94
	95	if (f2fs_sb_has_crypto(sb))
	96	len += snprintf(buf, PAGE_SIZE - len, "%s",
	97	"encryption");
	98	if (f2fs_sb_mounted_blkzoned(sb))
	99	len += snprintf(buf + len, PAGE_SIZE - len, "%s%s",
	100	len ? ", " : "", "blkzoned");
	101	if (f2fs_sb_has_extra_attr(sb))
	102	len += snprintf(buf + len, PAGE_SIZE - len, "%s%s",
	103	len ? ", " : "", "extra_attr");
	104	if (f2fs_sb_has_project_quota(sb))
	105	len += snprintf(buf + len, PAGE_SIZE - len, "%s%s",
	106	len ? ", " : "", "projquota");
	107	if (f2fs_sb_has_inode_chksum(sb))
	108	len += snprintf(buf + len, PAGE_SIZE - len, "%s%s",
	109	len ? ", " : "", "inode_checksum");
6afc662e CY	110	if (f2fs_sb_has_flexible_inline_xattr(sb))
	111	len += snprintf(buf + len, PAGE_SIZE - len, "%s%s",
	112	len ? ", " : "", "flexible_inline_xattr");
bf9e697e JK	113	len += snprintf(buf + len, PAGE_SIZE - len, "\n");
	114	return len;
	115	}
	116
8ceffcb2 CY	117	static ssize_t f2fs_sbi_show(struct f2fs_attr *a,
	118	struct f2fs_sb_info sbi, char buf)
	119	{
	120	unsigned char *ptr = NULL;
	121	unsigned int *ui;
	122
	123	ptr = __struct_ptr(sbi, a->struct_type);
	124	if (!ptr)
	125	return -EINVAL;
	126
	127	ui = (unsigned int *)(ptr + a->offset);
	128
	129	return snprintf(buf, PAGE_SIZE, "%u\n", *ui);
	130	}
	131
	132	static ssize_t f2fs_sbi_store(struct f2fs_attr *a,
	133	struct f2fs_sb_info *sbi,
	134	const char *buf, size_t count)
	135	{
	136	unsigned char *ptr;
	137	unsigned long t;
	138	unsigned int *ui;
	139	ssize_t ret;
	140
	141	ptr = __struct_ptr(sbi, a->struct_type);
	142	if (!ptr)
	143	return -EINVAL;
	144
	145	ui = (unsigned int *)(ptr + a->offset);
	146
	147	ret = kstrtoul(skip_spaces(buf), 0, &t);
	148	if (ret < 0)
	149	return ret;
	150	#ifdef CONFIG_F2FS_FAULT_INJECTION
	151	if (a->struct_type == FAULT_INFO_TYPE && t >= (1 << FAULT_MAX))
	152	return -EINVAL;
	153	#endif
daeb433e CY	154	if (a->struct_type == RESERVED_BLOCKS) {
	155	spin_lock(&sbi->stat_lock);
	156	if ((unsigned long)sbi->total_valid_block_count + t >
	157	(unsigned long)sbi->user_block_count) {
	158	spin_unlock(&sbi->stat_lock);
	159	return -EINVAL;
	160	}
	161	*ui = t;
	162	spin_unlock(&sbi->stat_lock);
	163	return count;
	164	}
969d1b18 CY	165
969d1b18 CY	166	if (!strcmp(a->attr.name, "discard_granularity")) {
969d1b18 CY	167	if (t == 0 \|\| t > MAX_PLIST_NUM)
	168	return -EINVAL;
	169	if (t == *ui)
	170	return count;
80647e5f	171	*ui = t;
969d1b18 CY	172	return count;
	173	}
	174
8ceffcb2	175	*ui = t;
b0af6d49 CY	176
	177	if (!strcmp(a->attr.name, "iostat_enable") && *ui == 0)
	178	f2fs_reset_iostat(sbi);
d9872a69 JK	179	if (!strcmp(a->attr.name, "gc_urgent") && t == 1 && sbi->gc_thread) {
	180	sbi->gc_thread->gc_wake = 1;
	181	wake_up_interruptible_all(&sbi->gc_thread->gc_wait_queue_head);
01983c71	182	wake_up_discard_thread(sbi, true);
d9872a69	183	}
b0af6d49	184
8ceffcb2 CY	185	return count;
	186	}
	187
	188	static ssize_t f2fs_attr_show(struct kobject *kobj,
	189	struct attribute attr, char buf)
	190	{
	191	struct f2fs_sb_info *sbi = container_of(kobj, struct f2fs_sb_info,
	192	s_kobj);
	193	struct f2fs_attr *a = container_of(attr, struct f2fs_attr, attr);
	194
	195	return a->show ? a->show(a, sbi, buf) : 0;
	196	}
	197
	198	static ssize_t f2fs_attr_store(struct kobject kobj, struct attribute attr,
	199	const char *buf, size_t len)
	200	{
	201	struct f2fs_sb_info *sbi = container_of(kobj, struct f2fs_sb_info,
	202	s_kobj);
	203	struct f2fs_attr *a = container_of(attr, struct f2fs_attr, attr);
	204
	205	return a->store ? a->store(a, sbi, buf, len) : 0;
	206	}
	207
	208	static void f2fs_sb_release(struct kobject *kobj)
	209	{
	210	struct f2fs_sb_info *sbi = container_of(kobj, struct f2fs_sb_info,
	211	s_kobj);
	212	complete(&sbi->s_kobj_unregister);
	213	}
	214
bf9e697e JK	215	enum feat_id {
	216	FEAT_CRYPTO = 0,
	217	FEAT_BLKZONED,
	218	FEAT_ATOMIC_WRITE,
	219	FEAT_EXTRA_ATTR,
	220	FEAT_PROJECT_QUOTA,
	221	FEAT_INODE_CHECKSUM,
6afc662e	222	FEAT_FLEXIBLE_INLINE_XATTR,
bf9e697e JK	223	};
	224
	225	static ssize_t f2fs_feature_show(struct f2fs_attr *a,
	226	struct f2fs_sb_info sbi, char buf)
	227	{
	228	switch (a->id) {
	229	case FEAT_CRYPTO:
	230	case FEAT_BLKZONED:
	231	case FEAT_ATOMIC_WRITE:
	232	case FEAT_EXTRA_ATTR:
	233	case FEAT_PROJECT_QUOTA:
	234	case FEAT_INODE_CHECKSUM:
6afc662e	235	case FEAT_FLEXIBLE_INLINE_XATTR:
bf9e697e JK	236	return snprintf(buf, PAGE_SIZE, "supported\n");
	237	}
	238	return 0;
	239	}
	240
8ceffcb2 CY	241	#define F2FS_ATTR_OFFSET(_struct_type, _name, _mode, _show, _store, _offset) \
	242	static struct f2fs_attr f2fs_attr_##_name = { \
	243	.attr = {.name = __stringify(_name), .mode = _mode }, \
	244	.show = _show, \
	245	.store = _store, \
	246	.struct_type = _struct_type, \
	247	.offset = _offset \
	248	}
	249
	250	#define F2FS_RW_ATTR(struct_type, struct_name, name, elname) \
	251	F2FS_ATTR_OFFSET(struct_type, name, 0644, \
	252	f2fs_sbi_show, f2fs_sbi_store, \
	253	offsetof(struct struct_name, elname))
	254
	255	#define F2FS_GENERAL_RO_ATTR(name) \
	256	static struct f2fs_attr f2fs_attr_##name = __ATTR(name, 0444, name##_show, NULL)
	257
bf9e697e JK	258	#define F2FS_FEATURE_RO_ATTR(_name, _id) \
	259	static struct f2fs_attr f2fs_attr_##_name = { \
	260	.attr = {.name = __stringify(_name), .mode = 0444 }, \
	261	.show = f2fs_feature_show, \
	262	.id = _id, \
	263	}
	264
d9872a69 JK	265	F2FS_RW_ATTR(GC_THREAD, f2fs_gc_kthread, gc_urgent_sleep_time,
d9872a69 JK	266	urgent_sleep_time);
8ceffcb2 CY	267	F2FS_RW_ATTR(GC_THREAD, f2fs_gc_kthread, gc_min_sleep_time, min_sleep_time);
	268	F2FS_RW_ATTR(GC_THREAD, f2fs_gc_kthread, gc_max_sleep_time, max_sleep_time);
	269	F2FS_RW_ATTR(GC_THREAD, f2fs_gc_kthread, gc_no_gc_sleep_time, no_gc_sleep_time);
	270	F2FS_RW_ATTR(GC_THREAD, f2fs_gc_kthread, gc_idle, gc_idle);
d9872a69	271	F2FS_RW_ATTR(GC_THREAD, f2fs_gc_kthread, gc_urgent, gc_urgent);
8ceffcb2 CY	272	F2FS_RW_ATTR(SM_INFO, f2fs_sm_info, reclaim_segments, rec_prefree_segments);
8ceffcb2 CY	273	F2FS_RW_ATTR(DCC_INFO, discard_cmd_control, max_small_discards, max_discards);
969d1b18	274	F2FS_RW_ATTR(DCC_INFO, discard_cmd_control, discard_granularity, discard_granularity);
daeb433e	275	F2FS_RW_ATTR(RESERVED_BLOCKS, f2fs_sb_info, reserved_blocks, reserved_blocks);
8ceffcb2 CY	276	F2FS_RW_ATTR(SM_INFO, f2fs_sm_info, batched_trim_sections, trim_sections);
	277	F2FS_RW_ATTR(SM_INFO, f2fs_sm_info, ipu_policy, ipu_policy);
	278	F2FS_RW_ATTR(SM_INFO, f2fs_sm_info, min_ipu_util, min_ipu_util);
	279	F2FS_RW_ATTR(SM_INFO, f2fs_sm_info, min_fsync_blocks, min_fsync_blocks);
	280	F2FS_RW_ATTR(SM_INFO, f2fs_sm_info, min_hot_blocks, min_hot_blocks);
	281	F2FS_RW_ATTR(NM_INFO, f2fs_nm_info, ram_thresh, ram_thresh);
	282	F2FS_RW_ATTR(NM_INFO, f2fs_nm_info, ra_nid_pages, ra_nid_pages);
	283	F2FS_RW_ATTR(NM_INFO, f2fs_nm_info, dirty_nats_ratio, dirty_nats_ratio);
	284	F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, max_victim_search, max_victim_search);
	285	F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, dir_level, dir_level);
	286	F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, cp_interval, interval_time[CP_TIME]);
	287	F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, idle_interval, interval_time[REQ_TIME]);
b0af6d49	288	F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, iostat_enable, iostat_enable);
8ceffcb2 CY	289	#ifdef CONFIG_F2FS_FAULT_INJECTION
	290	F2FS_RW_ATTR(FAULT_INFO_RATE, f2fs_fault_info, inject_rate, inject_rate);
	291	F2FS_RW_ATTR(FAULT_INFO_TYPE, f2fs_fault_info, inject_type, inject_type);
	292	#endif
8f1572f7	293	F2FS_GENERAL_RO_ATTR(dirty_segments);
8ceffcb2	294	F2FS_GENERAL_RO_ATTR(lifetime_write_kbytes);
bf9e697e JK	295	F2FS_GENERAL_RO_ATTR(features);
	296
	297	#ifdef CONFIG_F2FS_FS_ENCRYPTION
	298	F2FS_FEATURE_RO_ATTR(encryption, FEAT_CRYPTO);
	299	#endif
	300	#ifdef CONFIG_BLK_DEV_ZONED
	301	F2FS_FEATURE_RO_ATTR(block_zoned, FEAT_BLKZONED);
	302	#endif
	303	F2FS_FEATURE_RO_ATTR(atomic_write, FEAT_ATOMIC_WRITE);
	304	F2FS_FEATURE_RO_ATTR(extra_attr, FEAT_EXTRA_ATTR);
	305	F2FS_FEATURE_RO_ATTR(project_quota, FEAT_PROJECT_QUOTA);
	306	F2FS_FEATURE_RO_ATTR(inode_checksum, FEAT_INODE_CHECKSUM);
6afc662e	307	F2FS_FEATURE_RO_ATTR(flexible_inline_xattr, FEAT_FLEXIBLE_INLINE_XATTR);
8ceffcb2 CY	308
	309	#define ATTR_LIST(name) (&f2fs_attr_##name.attr)
	310	static struct attribute *f2fs_attrs[] = {
d9872a69	311	ATTR_LIST(gc_urgent_sleep_time),
8ceffcb2 CY	312	ATTR_LIST(gc_min_sleep_time),
	313	ATTR_LIST(gc_max_sleep_time),
	314	ATTR_LIST(gc_no_gc_sleep_time),
	315	ATTR_LIST(gc_idle),
d9872a69	316	ATTR_LIST(gc_urgent),
8ceffcb2 CY	317	ATTR_LIST(reclaim_segments),
8ceffcb2 CY	318	ATTR_LIST(max_small_discards),
969d1b18	319	ATTR_LIST(discard_granularity),
8ceffcb2 CY	320	ATTR_LIST(batched_trim_sections),
	321	ATTR_LIST(ipu_policy),
	322	ATTR_LIST(min_ipu_util),
	323	ATTR_LIST(min_fsync_blocks),
	324	ATTR_LIST(min_hot_blocks),
	325	ATTR_LIST(max_victim_search),
	326	ATTR_LIST(dir_level),
	327	ATTR_LIST(ram_thresh),
	328	ATTR_LIST(ra_nid_pages),
	329	ATTR_LIST(dirty_nats_ratio),
	330	ATTR_LIST(cp_interval),
	331	ATTR_LIST(idle_interval),
b0af6d49	332	ATTR_LIST(iostat_enable),
8ceffcb2 CY	333	#ifdef CONFIG_F2FS_FAULT_INJECTION
	334	ATTR_LIST(inject_rate),
	335	ATTR_LIST(inject_type),
	336	#endif
8f1572f7	337	ATTR_LIST(dirty_segments),
8ceffcb2	338	ATTR_LIST(lifetime_write_kbytes),
bf9e697e	339	ATTR_LIST(features),
daeb433e	340	ATTR_LIST(reserved_blocks),
8ceffcb2 CY	341	NULL,
	342	};
	343
bf9e697e JK	344	static struct attribute *f2fs_feat_attrs[] = {
	345	#ifdef CONFIG_F2FS_FS_ENCRYPTION
	346	ATTR_LIST(encryption),
	347	#endif
	348	#ifdef CONFIG_BLK_DEV_ZONED
	349	ATTR_LIST(block_zoned),
	350	#endif
	351	ATTR_LIST(atomic_write),
	352	ATTR_LIST(extra_attr),
	353	ATTR_LIST(project_quota),
	354	ATTR_LIST(inode_checksum),
6afc662e	355	ATTR_LIST(flexible_inline_xattr),
bf9e697e JK	356	NULL,
	357	};
	358
8ceffcb2 CY	359	static const struct sysfs_ops f2fs_attr_ops = {
	360	.show = f2fs_attr_show,
	361	.store = f2fs_attr_store,
	362	};
	363
bf9e697e	364	static struct kobj_type f2fs_sb_ktype = {
8ceffcb2 CY	365	.default_attrs = f2fs_attrs,
	366	.sysfs_ops = &f2fs_attr_ops,
	367	.release = f2fs_sb_release,
	368	};
	369
bf9e697e JK	370	static struct kobj_type f2fs_ktype = {
	371	.sysfs_ops = &f2fs_attr_ops,
	372	};
	373
	374	static struct kset f2fs_kset = {
	375	.kobj = {.ktype = &f2fs_ktype},
	376	};
	377
	378	static struct kobj_type f2fs_feat_ktype = {
	379	.default_attrs = f2fs_feat_attrs,
	380	.sysfs_ops = &f2fs_attr_ops,
	381	};
	382
	383	static struct kobject f2fs_feat = {
	384	.kset = &f2fs_kset,
	385	};
	386
8ceffcb2 CY	387	static int segment_info_seq_show(struct seq_file seq, void offset)
	388	{
	389	struct super_block *sb = seq->private;
	390	struct f2fs_sb_info *sbi = F2FS_SB(sb);
	391	unsigned int total_segs =
	392	le32_to_cpu(sbi->raw_super->segment_count_main);
	393	int i;
	394
	395	seq_puts(seq, "format: segment_type\|valid_blocks\n"
	396	"segment_type(0:HD, 1:WD, 2:CD, 3:HN, 4:WN, 5:CN)\n");
	397
	398	for (i = 0; i < total_segs; i++) {
	399	struct seg_entry *se = get_seg_entry(sbi, i);
	400
	401	if ((i % 10) == 0)
	402	seq_printf(seq, "%-10d", i);
	403	seq_printf(seq, "%d\|%-3u", se->type,
	404	get_valid_blocks(sbi, i, false));
	405	if ((i % 10) == 9 \|\| i == (total_segs - 1))
	406	seq_putc(seq, '\n');
	407	else
	408	seq_putc(seq, ' ');
	409	}
	410
	411	return 0;
	412	}
	413
	414	static int segment_bits_seq_show(struct seq_file seq, void offset)
	415	{
	416	struct super_block *sb = seq->private;
	417	struct f2fs_sb_info *sbi = F2FS_SB(sb);
	418	unsigned int total_segs =
	419	le32_to_cpu(sbi->raw_super->segment_count_main);
	420	int i, j;
	421
	422	seq_puts(seq, "format: segment_type\|valid_blocks\|bitmaps\n"
	423	"segment_type(0:HD, 1:WD, 2:CD, 3:HN, 4:WN, 5:CN)\n");
	424
	425	for (i = 0; i < total_segs; i++) {
	426	struct seg_entry *se = get_seg_entry(sbi, i);
	427
	428	seq_printf(seq, "%-10d", i);
	429	seq_printf(seq, "%d\|%-3u\|", se->type,
	430	get_valid_blocks(sbi, i, false));
	431	for (j = 0; j < SIT_VBLOCK_MAP_SIZE; j++)
	432	seq_printf(seq, " %.2x", se->cur_valid_map[j]);
	433	seq_putc(seq, '\n');
	434	}
	435	return 0;
	436	}
	437
b0af6d49 CY	438	static int iostat_info_seq_show(struct seq_file seq, void offset)
	439	{
	440	struct super_block *sb = seq->private;
	441	struct f2fs_sb_info *sbi = F2FS_SB(sb);
	442	time64_t now = ktime_get_real_seconds();
	443
	444	if (!sbi->iostat_enable)
	445	return 0;
	446
	447	seq_printf(seq, "time: %-16llu\n", now);
	448
	449	/* print app IOs */
	450	seq_printf(seq, "app buffered: %-16llu\n",
	451	sbi->write_iostat[APP_BUFFERED_IO]);
	452	seq_printf(seq, "app direct: %-16llu\n",
	453	sbi->write_iostat[APP_DIRECT_IO]);
	454	seq_printf(seq, "app mapped: %-16llu\n",
	455	sbi->write_iostat[APP_MAPPED_IO]);
	456
	457	/* print fs IOs */
	458	seq_printf(seq, "fs data: %-16llu\n",
	459	sbi->write_iostat[FS_DATA_IO]);
	460	seq_printf(seq, "fs node: %-16llu\n",
	461	sbi->write_iostat[FS_NODE_IO]);
	462	seq_printf(seq, "fs meta: %-16llu\n",
	463	sbi->write_iostat[FS_META_IO]);
	464	seq_printf(seq, "fs gc data: %-16llu\n",
	465	sbi->write_iostat[FS_GC_DATA_IO]);
	466	seq_printf(seq, "fs gc node: %-16llu\n",
	467	sbi->write_iostat[FS_GC_NODE_IO]);
	468	seq_printf(seq, "fs cp data: %-16llu\n",
	469	sbi->write_iostat[FS_CP_DATA_IO]);
	470	seq_printf(seq, "fs cp node: %-16llu\n",
	471	sbi->write_iostat[FS_CP_NODE_IO]);
	472	seq_printf(seq, "fs cp meta: %-16llu\n",
	473	sbi->write_iostat[FS_CP_META_IO]);
	474	seq_printf(seq, "fs discard: %-16llu\n",
	475	sbi->write_iostat[FS_DISCARD]);
	476
	477	return 0;
	478	}
	479
8ceffcb2 CY	480	#define F2FS_PROC_FILE_DEF(_name) \
	481	static int _name##_open_fs(struct inode inode, struct file file) \
	482	{ \
	483	return single_open(file, _name##_seq_show, PDE_DATA(inode)); \
	484	} \
	485	\
	486	static const struct file_operations f2fs_seq_##_name##_fops = { \
	487	.open = _name##_open_fs, \
	488	.read = seq_read, \
	489	.llseek = seq_lseek, \
	490	.release = single_release, \
	491	};
	492
	493	F2FS_PROC_FILE_DEF(segment_info);
	494	F2FS_PROC_FILE_DEF(segment_bits);
b0af6d49	495	F2FS_PROC_FILE_DEF(iostat_info);
8ceffcb2	496
dc6b2055	497	int __init f2fs_init_sysfs(void)
8ceffcb2	498	{
bf9e697e	499	int ret;
8ceffcb2	500
bf9e697e JK	501	kobject_set_name(&f2fs_kset.kobj, "f2fs");
	502	f2fs_kset.kobj.parent = fs_kobj;
	503	ret = kset_register(&f2fs_kset);
	504	if (ret)
	505	return ret;
	506
	507	ret = kobject_init_and_add(&f2fs_feat, &f2fs_feat_ktype,
	508	NULL, "features");
	509	if (ret)
	510	kset_unregister(&f2fs_kset);
	511	else
	512	f2fs_proc_root = proc_mkdir("fs/f2fs", NULL);
	513	return ret;
8ceffcb2 CY	514	}
8ceffcb2 CY	515
dc6b2055	516	void f2fs_exit_sysfs(void)
8ceffcb2	517	{
bf9e697e JK	518	kobject_put(&f2fs_feat);
bf9e697e JK	519	kset_unregister(&f2fs_kset);
8ceffcb2	520	remove_proc_entry("fs/f2fs", NULL);
bf9e697e	521	f2fs_proc_root = NULL;
8ceffcb2 CY	522	}
8ceffcb2 CY	523
dc6b2055	524	int f2fs_register_sysfs(struct f2fs_sb_info *sbi)
8ceffcb2 CY	525	{
	526	struct super_block *sb = sbi->sb;
	527	int err;
	528
bf9e697e JK	529	sbi->s_kobj.kset = &f2fs_kset;
	530	init_completion(&sbi->s_kobj_unregister);
	531	err = kobject_init_and_add(&sbi->s_kobj, &f2fs_sb_ktype, NULL,
	532	"%s", sb->s_id);
	533	if (err)
	534	return err;
	535
8ceffcb2 CY	536	if (f2fs_proc_root)
	537	sbi->s_proc = proc_mkdir(sb->s_id, f2fs_proc_root);
	538
	539	if (sbi->s_proc) {
	540	proc_create_data("segment_info", S_IRUGO, sbi->s_proc,
	541	&f2fs_seq_segment_info_fops, sb);
	542	proc_create_data("segment_bits", S_IRUGO, sbi->s_proc,
	543	&f2fs_seq_segment_bits_fops, sb);
b0af6d49 CY	544	proc_create_data("iostat_info", S_IRUGO, sbi->s_proc,
b0af6d49 CY	545	&f2fs_seq_iostat_info_fops, sb);
8ceffcb2	546	}
8ceffcb2	547	return 0;
8ceffcb2 CY	548	}
8ceffcb2 CY	549
dc6b2055	550	void f2fs_unregister_sysfs(struct f2fs_sb_info *sbi)
8ceffcb2	551	{
8ceffcb2	552	if (sbi->s_proc) {
b0af6d49	553	remove_proc_entry("iostat_info", sbi->s_proc);
8ceffcb2 CY	554	remove_proc_entry("segment_info", sbi->s_proc);
	555	remove_proc_entry("segment_bits", sbi->s_proc);
	556	remove_proc_entry(sbi->sb->s_id, f2fs_proc_root);
	557	}
bf9e697e	558	kobject_del(&sbi->s_kobj);
8ceffcb2	559	}