[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_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 *)&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");
	if (f2fs_sb_has_quota_ino(sb))
		len += snprintf(buf + len, PAGE_SIZE - len, "%s%s",
				len ? ", " : "", "quota_ino");
	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;

	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 (t > (unsigned long)sbi->user_block_count) {
			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,
};

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:
		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);
#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);

#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),
#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),
	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
80d42145	33	RESERVED_BLOCKS, /* struct f2fs_sb_info */
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");
234a9689 JK	113	if (f2fs_sb_has_quota_ino(sb))
	114	len += snprintf(buf + len, PAGE_SIZE - len, "%s%s",
	115	len ? ", " : "", "quota_ino");
bf9e697e JK	116	len += snprintf(buf + len, PAGE_SIZE - len, "\n");
	117	return len;
	118	}
	119
80d42145 YS	120	static ssize_t current_reserved_blocks_show(struct f2fs_attr *a,
	121	struct f2fs_sb_info sbi, char buf)
	122	{
	123	return snprintf(buf, PAGE_SIZE, "%u\n", sbi->current_reserved_blocks);
	124	}
	125
8ceffcb2 CY	126	static ssize_t f2fs_sbi_show(struct f2fs_attr *a,
	127	struct f2fs_sb_info sbi, char buf)
	128	{
	129	unsigned char *ptr = NULL;
	130	unsigned int *ui;
	131
	132	ptr = __struct_ptr(sbi, a->struct_type);
	133	if (!ptr)
	134	return -EINVAL;
	135
	136	ui = (unsigned int *)(ptr + a->offset);
	137
	138	return snprintf(buf, PAGE_SIZE, "%u\n", *ui);
	139	}
	140
	141	static ssize_t f2fs_sbi_store(struct f2fs_attr *a,
	142	struct f2fs_sb_info *sbi,
	143	const char *buf, size_t count)
	144	{
	145	unsigned char *ptr;
	146	unsigned long t;
	147	unsigned int *ui;
	148	ssize_t ret;
	149
	150	ptr = __struct_ptr(sbi, a->struct_type);
	151	if (!ptr)
	152	return -EINVAL;
	153
	154	ui = (unsigned int *)(ptr + a->offset);
	155
	156	ret = kstrtoul(skip_spaces(buf), 0, &t);
	157	if (ret < 0)
	158	return ret;
	159	#ifdef CONFIG_F2FS_FAULT_INJECTION
	160	if (a->struct_type == FAULT_INFO_TYPE && t >= (1 << FAULT_MAX))
	161	return -EINVAL;
	162	#endif
daeb433e CY	163	if (a->struct_type == RESERVED_BLOCKS) {
daeb433e CY	164	spin_lock(&sbi->stat_lock);
80d42145	165	if (t > (unsigned long)sbi->user_block_count) {
daeb433e CY	166	spin_unlock(&sbi->stat_lock);
	167	return -EINVAL;
	168	}
	169	*ui = t;
80d42145 YS	170	sbi->current_reserved_blocks = min(sbi->reserved_blocks,
80d42145 YS	171	sbi->user_block_count - valid_user_blocks(sbi));
daeb433e CY	172	spin_unlock(&sbi->stat_lock);
	173	return count;
	174	}
969d1b18 CY	175
969d1b18 CY	176	if (!strcmp(a->attr.name, "discard_granularity")) {
969d1b18 CY	177	if (t == 0 \|\| t > MAX_PLIST_NUM)
	178	return -EINVAL;
	179	if (t == *ui)
	180	return count;
80647e5f	181	*ui = t;
969d1b18 CY	182	return count;
	183	}
	184
8ceffcb2	185	*ui = t;
b0af6d49 CY	186
	187	if (!strcmp(a->attr.name, "iostat_enable") && *ui == 0)
	188	f2fs_reset_iostat(sbi);
d9872a69 JK	189	if (!strcmp(a->attr.name, "gc_urgent") && t == 1 && sbi->gc_thread) {
	190	sbi->gc_thread->gc_wake = 1;
	191	wake_up_interruptible_all(&sbi->gc_thread->gc_wait_queue_head);
01983c71	192	wake_up_discard_thread(sbi, true);
d9872a69	193	}
b0af6d49	194
8ceffcb2 CY	195	return count;
	196	}
	197
	198	static ssize_t f2fs_attr_show(struct kobject *kobj,
	199	struct attribute attr, char buf)
	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->show ? a->show(a, sbi, buf) : 0;
	206	}
	207
	208	static ssize_t f2fs_attr_store(struct kobject kobj, struct attribute attr,
	209	const char *buf, size_t len)
	210	{
	211	struct f2fs_sb_info *sbi = container_of(kobj, struct f2fs_sb_info,
	212	s_kobj);
	213	struct f2fs_attr *a = container_of(attr, struct f2fs_attr, attr);
	214
	215	return a->store ? a->store(a, sbi, buf, len) : 0;
	216	}
	217
	218	static void f2fs_sb_release(struct kobject *kobj)
	219	{
	220	struct f2fs_sb_info *sbi = container_of(kobj, struct f2fs_sb_info,
	221	s_kobj);
	222	complete(&sbi->s_kobj_unregister);
	223	}
	224
bf9e697e JK	225	enum feat_id {
	226	FEAT_CRYPTO = 0,
	227	FEAT_BLKZONED,
	228	FEAT_ATOMIC_WRITE,
	229	FEAT_EXTRA_ATTR,
	230	FEAT_PROJECT_QUOTA,
	231	FEAT_INODE_CHECKSUM,
6afc662e	232	FEAT_FLEXIBLE_INLINE_XATTR,
234a9689	233	FEAT_QUOTA_INO,
bf9e697e JK	234	};
	235
	236	static ssize_t f2fs_feature_show(struct f2fs_attr *a,
	237	struct f2fs_sb_info sbi, char buf)
	238	{
	239	switch (a->id) {
	240	case FEAT_CRYPTO:
	241	case FEAT_BLKZONED:
	242	case FEAT_ATOMIC_WRITE:
	243	case FEAT_EXTRA_ATTR:
	244	case FEAT_PROJECT_QUOTA:
	245	case FEAT_INODE_CHECKSUM:
6afc662e	246	case FEAT_FLEXIBLE_INLINE_XATTR:
234a9689	247	case FEAT_QUOTA_INO:
bf9e697e JK	248	return snprintf(buf, PAGE_SIZE, "supported\n");
	249	}
	250	return 0;
	251	}
	252
8ceffcb2 CY	253	#define F2FS_ATTR_OFFSET(_struct_type, _name, _mode, _show, _store, _offset) \
	254	static struct f2fs_attr f2fs_attr_##_name = { \
	255	.attr = {.name = __stringify(_name), .mode = _mode }, \
	256	.show = _show, \
	257	.store = _store, \
	258	.struct_type = _struct_type, \
	259	.offset = _offset \
	260	}
	261
	262	#define F2FS_RW_ATTR(struct_type, struct_name, name, elname) \
	263	F2FS_ATTR_OFFSET(struct_type, name, 0644, \
	264	f2fs_sbi_show, f2fs_sbi_store, \
	265	offsetof(struct struct_name, elname))
	266
	267	#define F2FS_GENERAL_RO_ATTR(name) \
	268	static struct f2fs_attr f2fs_attr_##name = __ATTR(name, 0444, name##_show, NULL)
	269
bf9e697e JK	270	#define F2FS_FEATURE_RO_ATTR(_name, _id) \
	271	static struct f2fs_attr f2fs_attr_##_name = { \
	272	.attr = {.name = __stringify(_name), .mode = 0444 }, \
	273	.show = f2fs_feature_show, \
	274	.id = _id, \
	275	}
	276
d9872a69 JK	277	F2FS_RW_ATTR(GC_THREAD, f2fs_gc_kthread, gc_urgent_sleep_time,
d9872a69 JK	278	urgent_sleep_time);
8ceffcb2 CY	279	F2FS_RW_ATTR(GC_THREAD, f2fs_gc_kthread, gc_min_sleep_time, min_sleep_time);
	280	F2FS_RW_ATTR(GC_THREAD, f2fs_gc_kthread, gc_max_sleep_time, max_sleep_time);
	281	F2FS_RW_ATTR(GC_THREAD, f2fs_gc_kthread, gc_no_gc_sleep_time, no_gc_sleep_time);
	282	F2FS_RW_ATTR(GC_THREAD, f2fs_gc_kthread, gc_idle, gc_idle);
d9872a69	283	F2FS_RW_ATTR(GC_THREAD, f2fs_gc_kthread, gc_urgent, gc_urgent);
8ceffcb2 CY	284	F2FS_RW_ATTR(SM_INFO, f2fs_sm_info, reclaim_segments, rec_prefree_segments);
8ceffcb2 CY	285	F2FS_RW_ATTR(DCC_INFO, discard_cmd_control, max_small_discards, max_discards);
969d1b18	286	F2FS_RW_ATTR(DCC_INFO, discard_cmd_control, discard_granularity, discard_granularity);
daeb433e	287	F2FS_RW_ATTR(RESERVED_BLOCKS, f2fs_sb_info, reserved_blocks, reserved_blocks);
8ceffcb2 CY	288	F2FS_RW_ATTR(SM_INFO, f2fs_sm_info, batched_trim_sections, trim_sections);
	289	F2FS_RW_ATTR(SM_INFO, f2fs_sm_info, ipu_policy, ipu_policy);
	290	F2FS_RW_ATTR(SM_INFO, f2fs_sm_info, min_ipu_util, min_ipu_util);
	291	F2FS_RW_ATTR(SM_INFO, f2fs_sm_info, min_fsync_blocks, min_fsync_blocks);
	292	F2FS_RW_ATTR(SM_INFO, f2fs_sm_info, min_hot_blocks, min_hot_blocks);
a2a12b67	293	F2FS_RW_ATTR(SM_INFO, f2fs_sm_info, min_ssr_sections, min_ssr_sections);
8ceffcb2 CY	294	F2FS_RW_ATTR(NM_INFO, f2fs_nm_info, ram_thresh, ram_thresh);
	295	F2FS_RW_ATTR(NM_INFO, f2fs_nm_info, ra_nid_pages, ra_nid_pages);
	296	F2FS_RW_ATTR(NM_INFO, f2fs_nm_info, dirty_nats_ratio, dirty_nats_ratio);
	297	F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, max_victim_search, max_victim_search);
	298	F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, dir_level, dir_level);
	299	F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, cp_interval, interval_time[CP_TIME]);
	300	F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, idle_interval, interval_time[REQ_TIME]);
b0af6d49	301	F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, iostat_enable, iostat_enable);
8ceffcb2 CY	302	#ifdef CONFIG_F2FS_FAULT_INJECTION
	303	F2FS_RW_ATTR(FAULT_INFO_RATE, f2fs_fault_info, inject_rate, inject_rate);
	304	F2FS_RW_ATTR(FAULT_INFO_TYPE, f2fs_fault_info, inject_type, inject_type);
	305	#endif
8f1572f7	306	F2FS_GENERAL_RO_ATTR(dirty_segments);
8ceffcb2	307	F2FS_GENERAL_RO_ATTR(lifetime_write_kbytes);
bf9e697e	308	F2FS_GENERAL_RO_ATTR(features);
80d42145	309	F2FS_GENERAL_RO_ATTR(current_reserved_blocks);
bf9e697e JK	310
	311	#ifdef CONFIG_F2FS_FS_ENCRYPTION
	312	F2FS_FEATURE_RO_ATTR(encryption, FEAT_CRYPTO);
	313	#endif
	314	#ifdef CONFIG_BLK_DEV_ZONED
	315	F2FS_FEATURE_RO_ATTR(block_zoned, FEAT_BLKZONED);
	316	#endif
	317	F2FS_FEATURE_RO_ATTR(atomic_write, FEAT_ATOMIC_WRITE);
	318	F2FS_FEATURE_RO_ATTR(extra_attr, FEAT_EXTRA_ATTR);
	319	F2FS_FEATURE_RO_ATTR(project_quota, FEAT_PROJECT_QUOTA);
	320	F2FS_FEATURE_RO_ATTR(inode_checksum, FEAT_INODE_CHECKSUM);
6afc662e	321	F2FS_FEATURE_RO_ATTR(flexible_inline_xattr, FEAT_FLEXIBLE_INLINE_XATTR);
234a9689	322	F2FS_FEATURE_RO_ATTR(quota_ino, FEAT_QUOTA_INO);
8ceffcb2 CY	323
	324	#define ATTR_LIST(name) (&f2fs_attr_##name.attr)
	325	static struct attribute *f2fs_attrs[] = {
d9872a69	326	ATTR_LIST(gc_urgent_sleep_time),
8ceffcb2 CY	327	ATTR_LIST(gc_min_sleep_time),
	328	ATTR_LIST(gc_max_sleep_time),
	329	ATTR_LIST(gc_no_gc_sleep_time),
	330	ATTR_LIST(gc_idle),
d9872a69	331	ATTR_LIST(gc_urgent),
8ceffcb2 CY	332	ATTR_LIST(reclaim_segments),
8ceffcb2 CY	333	ATTR_LIST(max_small_discards),
969d1b18	334	ATTR_LIST(discard_granularity),
8ceffcb2 CY	335	ATTR_LIST(batched_trim_sections),
	336	ATTR_LIST(ipu_policy),
	337	ATTR_LIST(min_ipu_util),
	338	ATTR_LIST(min_fsync_blocks),
	339	ATTR_LIST(min_hot_blocks),
a2a12b67	340	ATTR_LIST(min_ssr_sections),
8ceffcb2 CY	341	ATTR_LIST(max_victim_search),
	342	ATTR_LIST(dir_level),
	343	ATTR_LIST(ram_thresh),
	344	ATTR_LIST(ra_nid_pages),
	345	ATTR_LIST(dirty_nats_ratio),
	346	ATTR_LIST(cp_interval),
	347	ATTR_LIST(idle_interval),
b0af6d49	348	ATTR_LIST(iostat_enable),
8ceffcb2 CY	349	#ifdef CONFIG_F2FS_FAULT_INJECTION
	350	ATTR_LIST(inject_rate),
	351	ATTR_LIST(inject_type),
	352	#endif
8f1572f7	353	ATTR_LIST(dirty_segments),
8ceffcb2	354	ATTR_LIST(lifetime_write_kbytes),
bf9e697e	355	ATTR_LIST(features),
daeb433e	356	ATTR_LIST(reserved_blocks),
80d42145	357	ATTR_LIST(current_reserved_blocks),
8ceffcb2 CY	358	NULL,
	359	};
	360
bf9e697e JK	361	static struct attribute *f2fs_feat_attrs[] = {
	362	#ifdef CONFIG_F2FS_FS_ENCRYPTION
	363	ATTR_LIST(encryption),
	364	#endif
	365	#ifdef CONFIG_BLK_DEV_ZONED
	366	ATTR_LIST(block_zoned),
	367	#endif
	368	ATTR_LIST(atomic_write),
	369	ATTR_LIST(extra_attr),
	370	ATTR_LIST(project_quota),
	371	ATTR_LIST(inode_checksum),
6afc662e	372	ATTR_LIST(flexible_inline_xattr),
234a9689	373	ATTR_LIST(quota_ino),
bf9e697e JK	374	NULL,
	375	};
	376
8ceffcb2 CY	377	static const struct sysfs_ops f2fs_attr_ops = {
	378	.show = f2fs_attr_show,
	379	.store = f2fs_attr_store,
	380	};
	381
bf9e697e	382	static struct kobj_type f2fs_sb_ktype = {
8ceffcb2 CY	383	.default_attrs = f2fs_attrs,
	384	.sysfs_ops = &f2fs_attr_ops,
	385	.release = f2fs_sb_release,
	386	};
	387
bf9e697e JK	388	static struct kobj_type f2fs_ktype = {
	389	.sysfs_ops = &f2fs_attr_ops,
	390	};
	391
	392	static struct kset f2fs_kset = {
	393	.kobj = {.ktype = &f2fs_ktype},
	394	};
	395
	396	static struct kobj_type f2fs_feat_ktype = {
	397	.default_attrs = f2fs_feat_attrs,
	398	.sysfs_ops = &f2fs_attr_ops,
	399	};
	400
	401	static struct kobject f2fs_feat = {
	402	.kset = &f2fs_kset,
	403	};
	404
8ceffcb2 CY	405	static int segment_info_seq_show(struct seq_file seq, void offset)
	406	{
	407	struct super_block *sb = seq->private;
	408	struct f2fs_sb_info *sbi = F2FS_SB(sb);
	409	unsigned int total_segs =
	410	le32_to_cpu(sbi->raw_super->segment_count_main);
	411	int i;
	412
	413	seq_puts(seq, "format: segment_type\|valid_blocks\n"
	414	"segment_type(0:HD, 1:WD, 2:CD, 3:HN, 4:WN, 5:CN)\n");
	415
	416	for (i = 0; i < total_segs; i++) {
	417	struct seg_entry *se = get_seg_entry(sbi, i);
	418
	419	if ((i % 10) == 0)
	420	seq_printf(seq, "%-10d", i);
	421	seq_printf(seq, "%d\|%-3u", se->type,
	422	get_valid_blocks(sbi, i, false));
	423	if ((i % 10) == 9 \|\| i == (total_segs - 1))
	424	seq_putc(seq, '\n');
	425	else
	426	seq_putc(seq, ' ');
	427	}
	428
	429	return 0;
	430	}
	431
	432	static int segment_bits_seq_show(struct seq_file seq, void offset)
	433	{
	434	struct super_block *sb = seq->private;
	435	struct f2fs_sb_info *sbi = F2FS_SB(sb);
	436	unsigned int total_segs =
	437	le32_to_cpu(sbi->raw_super->segment_count_main);
	438	int i, j;
	439
	440	seq_puts(seq, "format: segment_type\|valid_blocks\|bitmaps\n"
	441	"segment_type(0:HD, 1:WD, 2:CD, 3:HN, 4:WN, 5:CN)\n");
	442
	443	for (i = 0; i < total_segs; i++) {
	444	struct seg_entry *se = get_seg_entry(sbi, i);
	445
	446	seq_printf(seq, "%-10d", i);
	447	seq_printf(seq, "%d\|%-3u\|", se->type,
	448	get_valid_blocks(sbi, i, false));
	449	for (j = 0; j < SIT_VBLOCK_MAP_SIZE; j++)
	450	seq_printf(seq, " %.2x", se->cur_valid_map[j]);
	451	seq_putc(seq, '\n');
	452	}
	453	return 0;
	454	}
	455
b0af6d49 CY	456	static int iostat_info_seq_show(struct seq_file seq, void offset)
	457	{
	458	struct super_block *sb = seq->private;
	459	struct f2fs_sb_info *sbi = F2FS_SB(sb);
	460	time64_t now = ktime_get_real_seconds();
	461
	462	if (!sbi->iostat_enable)
	463	return 0;
	464
	465	seq_printf(seq, "time: %-16llu\n", now);
	466
	467	/* print app IOs */
	468	seq_printf(seq, "app buffered: %-16llu\n",
	469	sbi->write_iostat[APP_BUFFERED_IO]);
	470	seq_printf(seq, "app direct: %-16llu\n",
	471	sbi->write_iostat[APP_DIRECT_IO]);
	472	seq_printf(seq, "app mapped: %-16llu\n",
	473	sbi->write_iostat[APP_MAPPED_IO]);
	474
	475	/* print fs IOs */
	476	seq_printf(seq, "fs data: %-16llu\n",
	477	sbi->write_iostat[FS_DATA_IO]);
	478	seq_printf(seq, "fs node: %-16llu\n",
	479	sbi->write_iostat[FS_NODE_IO]);
	480	seq_printf(seq, "fs meta: %-16llu\n",
	481	sbi->write_iostat[FS_META_IO]);
	482	seq_printf(seq, "fs gc data: %-16llu\n",
	483	sbi->write_iostat[FS_GC_DATA_IO]);
	484	seq_printf(seq, "fs gc node: %-16llu\n",
	485	sbi->write_iostat[FS_GC_NODE_IO]);
	486	seq_printf(seq, "fs cp data: %-16llu\n",
	487	sbi->write_iostat[FS_CP_DATA_IO]);
	488	seq_printf(seq, "fs cp node: %-16llu\n",
	489	sbi->write_iostat[FS_CP_NODE_IO]);
	490	seq_printf(seq, "fs cp meta: %-16llu\n",
	491	sbi->write_iostat[FS_CP_META_IO]);
	492	seq_printf(seq, "fs discard: %-16llu\n",
	493	sbi->write_iostat[FS_DISCARD]);
	494
	495	return 0;
	496	}
	497
8ceffcb2 CY	498	#define F2FS_PROC_FILE_DEF(_name) \
	499	static int _name##_open_fs(struct inode inode, struct file file) \
	500	{ \
	501	return single_open(file, _name##_seq_show, PDE_DATA(inode)); \
	502	} \
	503	\
	504	static const struct file_operations f2fs_seq_##_name##_fops = { \
	505	.open = _name##_open_fs, \
	506	.read = seq_read, \
	507	.llseek = seq_lseek, \
	508	.release = single_release, \
	509	};
	510
	511	F2FS_PROC_FILE_DEF(segment_info);
	512	F2FS_PROC_FILE_DEF(segment_bits);
b0af6d49	513	F2FS_PROC_FILE_DEF(iostat_info);
8ceffcb2	514
dc6b2055	515	int __init f2fs_init_sysfs(void)
8ceffcb2	516	{
bf9e697e	517	int ret;
8ceffcb2	518
bf9e697e JK	519	kobject_set_name(&f2fs_kset.kobj, "f2fs");
	520	f2fs_kset.kobj.parent = fs_kobj;
	521	ret = kset_register(&f2fs_kset);
	522	if (ret)
	523	return ret;
	524
	525	ret = kobject_init_and_add(&f2fs_feat, &f2fs_feat_ktype,
	526	NULL, "features");
	527	if (ret)
	528	kset_unregister(&f2fs_kset);
	529	else
	530	f2fs_proc_root = proc_mkdir("fs/f2fs", NULL);
	531	return ret;
8ceffcb2 CY	532	}
8ceffcb2 CY	533
dc6b2055	534	void f2fs_exit_sysfs(void)
8ceffcb2	535	{
bf9e697e JK	536	kobject_put(&f2fs_feat);
bf9e697e JK	537	kset_unregister(&f2fs_kset);
8ceffcb2	538	remove_proc_entry("fs/f2fs", NULL);
bf9e697e	539	f2fs_proc_root = NULL;
8ceffcb2 CY	540	}
8ceffcb2 CY	541
dc6b2055	542	int f2fs_register_sysfs(struct f2fs_sb_info *sbi)
8ceffcb2 CY	543	{
	544	struct super_block *sb = sbi->sb;
	545	int err;
	546
bf9e697e JK	547	sbi->s_kobj.kset = &f2fs_kset;
	548	init_completion(&sbi->s_kobj_unregister);
	549	err = kobject_init_and_add(&sbi->s_kobj, &f2fs_sb_ktype, NULL,
	550	"%s", sb->s_id);
	551	if (err)
	552	return err;
	553
8ceffcb2 CY	554	if (f2fs_proc_root)
	555	sbi->s_proc = proc_mkdir(sb->s_id, f2fs_proc_root);
	556
	557	if (sbi->s_proc) {
	558	proc_create_data("segment_info", S_IRUGO, sbi->s_proc,
	559	&f2fs_seq_segment_info_fops, sb);
	560	proc_create_data("segment_bits", S_IRUGO, sbi->s_proc,
	561	&f2fs_seq_segment_bits_fops, sb);
b0af6d49 CY	562	proc_create_data("iostat_info", S_IRUGO, sbi->s_proc,
b0af6d49 CY	563	&f2fs_seq_iostat_info_fops, sb);
8ceffcb2	564	}
8ceffcb2	565	return 0;
8ceffcb2 CY	566	}
8ceffcb2 CY	567
dc6b2055	568	void f2fs_unregister_sysfs(struct f2fs_sb_info *sbi)
8ceffcb2	569	{
8ceffcb2	570	if (sbi->s_proc) {
b0af6d49	571	remove_proc_entry("iostat_info", sbi->s_proc);
8ceffcb2 CY	572	remove_proc_entry("segment_info", sbi->s_proc);
	573	remove_proc_entry("segment_bits", sbi->s_proc);
	574	remove_proc_entry(sbi->sb->s_id, f2fs_proc_root);
	575	}
bf9e697e	576	kobject_del(&sbi->s_kobj);
8ceffcb2	577	}