[linux-2.6-block.git] / fs / f2fs / debug.c

/*
 * f2fs debugging statistics
 *
 * Copyright (c) 2012 Samsung Electronics Co., Ltd.
 *             http://www.samsung.com/
 * Copyright (c) 2012 Linux Foundation
 * Copyright (c) 2012 Greg Kroah-Hartman <gregkh@linuxfoundation.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/fs.h>
#include <linux/backing-dev.h>
#include <linux/f2fs_fs.h>
#include <linux/blkdev.h>
#include <linux/debugfs.h>
#include <linux/seq_file.h>

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

static LIST_HEAD(f2fs_stat_list);
static struct dentry *f2fs_debugfs_root;
static DEFINE_MUTEX(f2fs_stat_mutex);

static void update_general_status(struct f2fs_sb_info *sbi)
{
	struct f2fs_stat_info *si = F2FS_STAT(sbi);
	int i;

	/* validation check of the segment numbers */
	si->hit_largest = atomic64_read(&sbi->read_hit_largest);
	si->hit_cached = atomic64_read(&sbi->read_hit_cached);
	si->hit_rbtree = atomic64_read(&sbi->read_hit_rbtree);
	si->hit_total = si->hit_largest + si->hit_cached + si->hit_rbtree;
	si->total_ext = atomic64_read(&sbi->total_hit_ext);
	si->ext_tree = atomic_read(&sbi->total_ext_tree);
	si->zombie_tree = atomic_read(&sbi->total_zombie_tree);
	si->ext_node = atomic_read(&sbi->total_ext_node);
	si->ndirty_node = get_pages(sbi, F2FS_DIRTY_NODES);
	si->ndirty_dent = get_pages(sbi, F2FS_DIRTY_DENTS);
	si->ndirty_meta = get_pages(sbi, F2FS_DIRTY_META);
	si->ndirty_data = get_pages(sbi, F2FS_DIRTY_DATA);
	si->ndirty_dirs = sbi->ndirty_inode[DIR_INODE];
	si->ndirty_files = sbi->ndirty_inode[FILE_INODE];
	si->inmem_pages = get_pages(sbi, F2FS_INMEM_PAGES);
	si->wb_bios = atomic_read(&sbi->nr_wb_bios);
	si->total_count = (int)sbi->user_block_count / sbi->blocks_per_seg;
	si->rsvd_segs = reserved_segments(sbi);
	si->overp_segs = overprovision_segments(sbi);
	si->valid_count = valid_user_blocks(sbi);
	si->valid_node_count = valid_node_count(sbi);
	si->valid_inode_count = valid_inode_count(sbi);
	si->inline_xattr = atomic_read(&sbi->inline_xattr);
	si->inline_inode = atomic_read(&sbi->inline_inode);
	si->inline_dir = atomic_read(&sbi->inline_dir);
	si->orphans = sbi->im[ORPHAN_INO].ino_num;
	si->utilization = utilization(sbi);

	si->free_segs = free_segments(sbi);
	si->free_secs = free_sections(sbi);
	si->prefree_count = prefree_segments(sbi);
	si->dirty_count = dirty_segments(sbi);
	si->node_pages = NODE_MAPPING(sbi)->nrpages;
	si->meta_pages = META_MAPPING(sbi)->nrpages;
	si->nats = NM_I(sbi)->nat_cnt;
	si->dirty_nats = NM_I(sbi)->dirty_nat_cnt;
	si->sits = MAIN_SEGS(sbi);
	si->dirty_sits = SIT_I(sbi)->dirty_sentries;
	si->fnids = NM_I(sbi)->fcnt;
	si->bg_gc = sbi->bg_gc;
	si->util_free = (int)(free_user_blocks(sbi) >> sbi->log_blocks_per_seg)
		* 100 / (int)(sbi->user_block_count >> sbi->log_blocks_per_seg)
		/ 2;
	si->util_valid = (int)(written_block_count(sbi) >>
						sbi->log_blocks_per_seg)
		* 100 / (int)(sbi->user_block_count >> sbi->log_blocks_per_seg)
		/ 2;
	si->util_invalid = 50 - si->util_free - si->util_valid;
	for (i = CURSEG_HOT_DATA; i <= CURSEG_COLD_NODE; i++) {
		struct curseg_info *curseg = CURSEG_I(sbi, i);
		si->curseg[i] = curseg->segno;
		si->cursec[i] = curseg->segno / sbi->segs_per_sec;
		si->curzone[i] = si->cursec[i] / sbi->secs_per_zone;
	}

	for (i = 0; i < 2; i++) {
		si->segment_count[i] = sbi->segment_count[i];
		si->block_count[i] = sbi->block_count[i];
	}

	si->inplace_count = atomic_read(&sbi->inplace_count);
}

/*
 * This function calculates BDF of every segments
 */
static void update_sit_info(struct f2fs_sb_info *sbi)
{
	struct f2fs_stat_info *si = F2FS_STAT(sbi);
	unsigned long long blks_per_sec, hblks_per_sec, total_vblocks;
	unsigned long long bimodal, dist;
	unsigned int segno, vblocks;
	int ndirty = 0;

	bimodal = 0;
	total_vblocks = 0;
	blks_per_sec = sbi->segs_per_sec * sbi->blocks_per_seg;
	hblks_per_sec = blks_per_sec / 2;
	for (segno = 0; segno < MAIN_SEGS(sbi); segno += sbi->segs_per_sec) {
		vblocks = get_valid_blocks(sbi, segno, sbi->segs_per_sec);
		dist = abs(vblocks - hblks_per_sec);
		bimodal += dist * dist;

		if (vblocks > 0 && vblocks < blks_per_sec) {
			total_vblocks += vblocks;
			ndirty++;
		}
	}
	dist = div_u64(MAIN_SECS(sbi) * hblks_per_sec * hblks_per_sec, 100);
	si->bimodal = div64_u64(bimodal, dist);
	if (si->dirty_count)
		si->avg_vblocks = div_u64(total_vblocks, ndirty);
	else
		si->avg_vblocks = 0;
}

/*
 * This function calculates memory footprint.
 */
static void update_mem_info(struct f2fs_sb_info *sbi)
{
	struct f2fs_stat_info *si = F2FS_STAT(sbi);
	unsigned npages;
	int i;

	if (si->base_mem)
		goto get_cache;

	si->base_mem = sizeof(struct f2fs_sb_info) + sbi->sb->s_blocksize;
	si->base_mem += 2 * sizeof(struct f2fs_inode_info);
	si->base_mem += sizeof(*sbi->ckpt);
	si->base_mem += sizeof(struct percpu_counter) * NR_COUNT_TYPE;

	/* build sm */
	si->base_mem += sizeof(struct f2fs_sm_info);

	/* build sit */
	si->base_mem += sizeof(struct sit_info);
	si->base_mem += MAIN_SEGS(sbi) * sizeof(struct seg_entry);
	si->base_mem += f2fs_bitmap_size(MAIN_SEGS(sbi));
	si->base_mem += 3 * SIT_VBLOCK_MAP_SIZE * MAIN_SEGS(sbi);
	si->base_mem += SIT_VBLOCK_MAP_SIZE;
	if (sbi->segs_per_sec > 1)
		si->base_mem += MAIN_SECS(sbi) * sizeof(struct sec_entry);
	si->base_mem += __bitmap_size(sbi, SIT_BITMAP);

	/* build free segmap */
	si->base_mem += sizeof(struct free_segmap_info);
	si->base_mem += f2fs_bitmap_size(MAIN_SEGS(sbi));
	si->base_mem += f2fs_bitmap_size(MAIN_SECS(sbi));

	/* build curseg */
	si->base_mem += sizeof(struct curseg_info) * NR_CURSEG_TYPE;
	si->base_mem += PAGE_SIZE * NR_CURSEG_TYPE;

	/* build dirty segmap */
	si->base_mem += sizeof(struct dirty_seglist_info);
	si->base_mem += NR_DIRTY_TYPE * f2fs_bitmap_size(MAIN_SEGS(sbi));
	si->base_mem += f2fs_bitmap_size(MAIN_SECS(sbi));

	/* build nm */
	si->base_mem += sizeof(struct f2fs_nm_info);
	si->base_mem += __bitmap_size(sbi, NAT_BITMAP);

get_cache:
	si->cache_mem = 0;

	/* build gc */
	if (sbi->gc_thread)
		si->cache_mem += sizeof(struct f2fs_gc_kthread);

	/* build merge flush thread */
	if (SM_I(sbi)->cmd_control_info)
		si->cache_mem += sizeof(struct flush_cmd_control);

	/* free nids */
	si->cache_mem += NM_I(sbi)->fcnt * sizeof(struct free_nid);
	si->cache_mem += NM_I(sbi)->nat_cnt * sizeof(struct nat_entry);
	si->cache_mem += NM_I(sbi)->dirty_nat_cnt *
					sizeof(struct nat_entry_set);
	si->cache_mem += si->inmem_pages * sizeof(struct inmem_pages);
	for (i = 0; i <= ORPHAN_INO; i++)
		si->cache_mem += sbi->im[i].ino_num * sizeof(struct ino_entry);
	si->cache_mem += atomic_read(&sbi->total_ext_tree) *
						sizeof(struct extent_tree);
	si->cache_mem += atomic_read(&sbi->total_ext_node) *
						sizeof(struct extent_node);

	si->page_mem = 0;
	npages = NODE_MAPPING(sbi)->nrpages;
	si->page_mem += (unsigned long long)npages << PAGE_SHIFT;
	npages = META_MAPPING(sbi)->nrpages;
	si->page_mem += (unsigned long long)npages << PAGE_SHIFT;
}

static int stat_show(struct seq_file *s, void *v)
{
	struct f2fs_stat_info *si;
	int i = 0;
	int j;

	mutex_lock(&f2fs_stat_mutex);
	list_for_each_entry(si, &f2fs_stat_list, stat_list) {
		update_general_status(si->sbi);

		seq_printf(s, "\n=====[ partition info(%pg). #%d, %s]=====\n",
			si->sbi->sb->s_bdev, i++,
			f2fs_readonly(si->sbi->sb) ? "RO": "RW");
		seq_printf(s, "[SB: 1] [CP: 2] [SIT: %d] [NAT: %d] ",
			   si->sit_area_segs, si->nat_area_segs);
		seq_printf(s, "[SSA: %d] [MAIN: %d",
			   si->ssa_area_segs, si->main_area_segs);
		seq_printf(s, "(OverProv:%d Resv:%d)]\n\n",
			   si->overp_segs, si->rsvd_segs);
		seq_printf(s, "Utilization: %d%% (%d valid blocks)\n",
			   si->utilization, si->valid_count);
		seq_printf(s, "  - Node: %u (Inode: %u, ",
			   si->valid_node_count, si->valid_inode_count);
		seq_printf(s, "Other: %u)\n  - Data: %u\n",
			   si->valid_node_count - si->valid_inode_count,
			   si->valid_count - si->valid_node_count);
		seq_printf(s, "  - Inline_xattr Inode: %u\n",
			   si->inline_xattr);
		seq_printf(s, "  - Inline_data Inode: %u\n",
			   si->inline_inode);
		seq_printf(s, "  - Inline_dentry Inode: %u\n",
			   si->inline_dir);
		seq_printf(s, "  - Orphan Inode: %u\n",
			   si->orphans);
		seq_printf(s, "\nMain area: %d segs, %d secs %d zones\n",
			   si->main_area_segs, si->main_area_sections,
			   si->main_area_zones);
		seq_printf(s, "  - COLD  data: %d, %d, %d\n",
			   si->curseg[CURSEG_COLD_DATA],
			   si->cursec[CURSEG_COLD_DATA],
			   si->curzone[CURSEG_COLD_DATA]);
		seq_printf(s, "  - WARM  data: %d, %d, %d\n",
			   si->curseg[CURSEG_WARM_DATA],
			   si->cursec[CURSEG_WARM_DATA],
			   si->curzone[CURSEG_WARM_DATA]);
		seq_printf(s, "  - HOT   data: %d, %d, %d\n",
			   si->curseg[CURSEG_HOT_DATA],
			   si->cursec[CURSEG_HOT_DATA],
			   si->curzone[CURSEG_HOT_DATA]);
		seq_printf(s, "  - Dir   dnode: %d, %d, %d\n",
			   si->curseg[CURSEG_HOT_NODE],
			   si->cursec[CURSEG_HOT_NODE],
			   si->curzone[CURSEG_HOT_NODE]);
		seq_printf(s, "  - File   dnode: %d, %d, %d\n",
			   si->curseg[CURSEG_WARM_NODE],
			   si->cursec[CURSEG_WARM_NODE],
			   si->curzone[CURSEG_WARM_NODE]);
		seq_printf(s, "  - Indir nodes: %d, %d, %d\n",
			   si->curseg[CURSEG_COLD_NODE],
			   si->cursec[CURSEG_COLD_NODE],
			   si->curzone[CURSEG_COLD_NODE]);
		seq_printf(s, "\n  - Valid: %d\n  - Dirty: %d\n",
			   si->main_area_segs - si->dirty_count -
			   si->prefree_count - si->free_segs,
			   si->dirty_count);
		seq_printf(s, "  - Prefree: %d\n  - Free: %d (%d)\n\n",
			   si->prefree_count, si->free_segs, si->free_secs);
		seq_printf(s, "CP calls: %d (BG: %d)\n",
				si->cp_count, si->bg_cp_count);
		seq_printf(s, "GC calls: %d (BG: %d)\n",
			   si->call_count, si->bg_gc);
		seq_printf(s, "  - data segments : %d (%d)\n",
				si->data_segs, si->bg_data_segs);
		seq_printf(s, "  - node segments : %d (%d)\n",
				si->node_segs, si->bg_node_segs);
		seq_printf(s, "Try to move %d blocks (BG: %d)\n", si->tot_blks,
				si->bg_data_blks + si->bg_node_blks);
		seq_printf(s, "  - data blocks : %d (%d)\n", si->data_blks,
				si->bg_data_blks);
		seq_printf(s, "  - node blocks : %d (%d)\n", si->node_blks,
				si->bg_node_blks);
		seq_puts(s, "\nExtent Cache:\n");
		seq_printf(s, "  - Hit Count: L1-1:%llu L1-2:%llu L2:%llu\n",
				si->hit_largest, si->hit_cached,
				si->hit_rbtree);
		seq_printf(s, "  - Hit Ratio: %llu%% (%llu / %llu)\n",
				!si->total_ext ? 0 :
				div64_u64(si->hit_total * 100, si->total_ext),
				si->hit_total, si->total_ext);
		seq_printf(s, "  - Inner Struct Count: tree: %d(%d), node: %d\n",
				si->ext_tree, si->zombie_tree, si->ext_node);
		seq_puts(s, "\nBalancing F2FS Async:\n");
		seq_printf(s, "  - inmem: %4lld, wb_bios: %4d\n",
			   si->inmem_pages, si->wb_bios);
		seq_printf(s, "  - nodes: %4lld in %4d\n",
			   si->ndirty_node, si->node_pages);
		seq_printf(s, "  - dents: %4lld in dirs:%4d\n",
			   si->ndirty_dent, si->ndirty_dirs);
		seq_printf(s, "  - datas: %4lld in files:%4d\n",
			   si->ndirty_data, si->ndirty_files);
		seq_printf(s, "  - meta: %4lld in %4d\n",
			   si->ndirty_meta, si->meta_pages);
		seq_printf(s, "  - NATs: %9d/%9d\n  - SITs: %9d/%9d\n",
			   si->dirty_nats, si->nats, si->dirty_sits, si->sits);
		seq_printf(s, "  - free_nids: %9d\n",
			   si->fnids);
		seq_puts(s, "\nDistribution of User Blocks:");
		seq_puts(s, " [ valid | invalid | free ]\n");
		seq_puts(s, "  [");

		for (j = 0; j < si->util_valid; j++)
			seq_putc(s, '-');
		seq_putc(s, '|');

		for (j = 0; j < si->util_invalid; j++)
			seq_putc(s, '-');
		seq_putc(s, '|');

		for (j = 0; j < si->util_free; j++)
			seq_putc(s, '-');
		seq_puts(s, "]\n\n");
		seq_printf(s, "IPU: %u blocks\n", si->inplace_count);
		seq_printf(s, "SSR: %u blocks in %u segments\n",
			   si->block_count[SSR], si->segment_count[SSR]);
		seq_printf(s, "LFS: %u blocks in %u segments\n",
			   si->block_count[LFS], si->segment_count[LFS]);

		/* segment usage info */
		update_sit_info(si->sbi);
		seq_printf(s, "\nBDF: %u, avg. vblocks: %u\n",
			   si->bimodal, si->avg_vblocks);

		/* memory footprint */
		update_mem_info(si->sbi);
		seq_printf(s, "\nMemory: %llu KB\n",
			(si->base_mem + si->cache_mem + si->page_mem) >> 10);
		seq_printf(s, "  - static: %llu KB\n",
				si->base_mem >> 10);
		seq_printf(s, "  - cached: %llu KB\n",
				si->cache_mem >> 10);
		seq_printf(s, "  - paged : %llu KB\n",
				si->page_mem >> 10);
	}
	mutex_unlock(&f2fs_stat_mutex);
	return 0;
}

static int stat_open(struct inode *inode, struct file *file)
{
	return single_open(file, stat_show, inode->i_private);
}

static const struct file_operations stat_fops = {
	.open = stat_open,
	.read = seq_read,
	.llseek = seq_lseek,
	.release = single_release,
};

int f2fs_build_stats(struct f2fs_sb_info *sbi)
{
	struct f2fs_super_block *raw_super = F2FS_RAW_SUPER(sbi);
	struct f2fs_stat_info *si;

	si = kzalloc(sizeof(struct f2fs_stat_info), GFP_KERNEL);
	if (!si)
		return -ENOMEM;

	si->all_area_segs = le32_to_cpu(raw_super->segment_count);
	si->sit_area_segs = le32_to_cpu(raw_super->segment_count_sit);
	si->nat_area_segs = le32_to_cpu(raw_super->segment_count_nat);
	si->ssa_area_segs = le32_to_cpu(raw_super->segment_count_ssa);
	si->main_area_segs = le32_to_cpu(raw_super->segment_count_main);
	si->main_area_sections = le32_to_cpu(raw_super->section_count);
	si->main_area_zones = si->main_area_sections /
				le32_to_cpu(raw_super->secs_per_zone);
	si->sbi = sbi;
	sbi->stat_info = si;

	atomic64_set(&sbi->total_hit_ext, 0);
	atomic64_set(&sbi->read_hit_rbtree, 0);
	atomic64_set(&sbi->read_hit_largest, 0);
	atomic64_set(&sbi->read_hit_cached, 0);

	atomic_set(&sbi->inline_xattr, 0);
	atomic_set(&sbi->inline_inode, 0);
	atomic_set(&sbi->inline_dir, 0);
	atomic_set(&sbi->inplace_count, 0);

	mutex_lock(&f2fs_stat_mutex);
	list_add_tail(&si->stat_list, &f2fs_stat_list);
	mutex_unlock(&f2fs_stat_mutex);

	return 0;
}

void f2fs_destroy_stats(struct f2fs_sb_info *sbi)
{
	struct f2fs_stat_info *si = F2FS_STAT(sbi);

	mutex_lock(&f2fs_stat_mutex);
	list_del(&si->stat_list);
	mutex_unlock(&f2fs_stat_mutex);

	kfree(si);
}

int __init f2fs_create_root_stats(void)
{
	struct dentry *file;

	f2fs_debugfs_root = debugfs_create_dir("f2fs", NULL);
	if (!f2fs_debugfs_root)
		return -ENOMEM;

	file = debugfs_create_file("status", S_IRUGO, f2fs_debugfs_root,
			NULL, &stat_fops);
	if (!file) {
		debugfs_remove(f2fs_debugfs_root);
		f2fs_debugfs_root = NULL;
		return -ENOMEM;
	}

	return 0;
}

void f2fs_destroy_root_stats(void)
{
	if (!f2fs_debugfs_root)
		return;

	debugfs_remove_recursive(f2fs_debugfs_root);
	f2fs_debugfs_root = NULL;
}
Commit	Line	Data
0a8165d7	1	/*
902829aa GKH	2	* f2fs debugging statistics
	3	*
	4	* Copyright (c) 2012 Samsung Electronics Co., Ltd.
	5	* http://www.samsung.com/
	6	* Copyright (c) 2012 Linux Foundation
	7	* Copyright (c) 2012 Greg Kroah-Hartman <gregkh@linuxfoundation.org>
	8	*
	9	* This program is free software; you can redistribute it and/or modify
	10	* it under the terms of the GNU General Public License version 2 as
	11	* published by the Free Software Foundation.
	12	*/
	13
	14	#include <linux/fs.h>
	15	#include <linux/backing-dev.h>
902829aa GKH	16	#include <linux/f2fs_fs.h>
	17	#include <linux/blkdev.h>
	18	#include <linux/debugfs.h>
	19	#include <linux/seq_file.h>
	20
	21	#include "f2fs.h"
	22	#include "node.h"
	23	#include "segment.h"
	24	#include "gc.h"
	25
	26	static LIST_HEAD(f2fs_stat_list);
40e1ebe9	27	static struct dentry *f2fs_debugfs_root;
66af62ce	28	static DEFINE_MUTEX(f2fs_stat_mutex);
902829aa	29
25ca923b	30	static void update_general_status(struct f2fs_sb_info *sbi)
902829aa	31	{
963d4f7d	32	struct f2fs_stat_info *si = F2FS_STAT(sbi);
902829aa GKH	33	int i;
902829aa GKH	34
e1c42045	35	/* validation check of the segment numbers */
5b7ee374 CY	36	si->hit_largest = atomic64_read(&sbi->read_hit_largest);
	37	si->hit_cached = atomic64_read(&sbi->read_hit_cached);
	38	si->hit_rbtree = atomic64_read(&sbi->read_hit_rbtree);
029e13cc	39	si->hit_total = si->hit_largest + si->hit_cached + si->hit_rbtree;
5b7ee374	40	si->total_ext = atomic64_read(&sbi->total_hit_ext);
7441ccef	41	si->ext_tree = atomic_read(&sbi->total_ext_tree);
c00ba554	42	si->zombie_tree = atomic_read(&sbi->total_zombie_tree);
4bf6fd9f	43	si->ext_node = atomic_read(&sbi->total_ext_node);
902829aa GKH	44	si->ndirty_node = get_pages(sbi, F2FS_DIRTY_NODES);
902829aa GKH	45	si->ndirty_dent = get_pages(sbi, F2FS_DIRTY_DENTS);
902829aa	46	si->ndirty_meta = get_pages(sbi, F2FS_DIRTY_META);
33fbd510 CY	47	si->ndirty_data = get_pages(sbi, F2FS_DIRTY_DATA);
	48	si->ndirty_dirs = sbi->ndirty_inode[DIR_INODE];
	49	si->ndirty_files = sbi->ndirty_inode[FILE_INODE];
8dcf2ff7	50	si->inmem_pages = get_pages(sbi, F2FS_INMEM_PAGES);
f5730184	51	si->wb_bios = atomic_read(&sbi->nr_wb_bios);
902829aa GKH	52	si->total_count = (int)sbi->user_block_count / sbi->blocks_per_seg;
	53	si->rsvd_segs = reserved_segments(sbi);
	54	si->overp_segs = overprovision_segments(sbi);
	55	si->valid_count = valid_user_blocks(sbi);
	56	si->valid_node_count = valid_node_count(sbi);
	57	si->valid_inode_count = valid_inode_count(sbi);
d5e8f6c9	58	si->inline_xattr = atomic_read(&sbi->inline_xattr);
03e14d52 CY	59	si->inline_inode = atomic_read(&sbi->inline_inode);
03e14d52 CY	60	si->inline_dir = atomic_read(&sbi->inline_dir);
652be551	61	si->orphans = sbi->im[ORPHAN_INO].ino_num;
902829aa GKH	62	si->utilization = utilization(sbi);
	63
	64	si->free_segs = free_segments(sbi);
	65	si->free_secs = free_sections(sbi);
	66	si->prefree_count = prefree_segments(sbi);
	67	si->dirty_count = dirty_segments(sbi);
4ef51a8f	68	si->node_pages = NODE_MAPPING(sbi)->nrpages;
9df27d98	69	si->meta_pages = META_MAPPING(sbi)->nrpages;
902829aa	70	si->nats = NM_I(sbi)->nat_cnt;
dd4e4b59 JK	71	si->dirty_nats = NM_I(sbi)->dirty_nat_cnt;
	72	si->sits = MAIN_SEGS(sbi);
	73	si->dirty_sits = SIT_I(sbi)->dirty_sentries;
902829aa GKH	74	si->fnids = NM_I(sbi)->fcnt;
	75	si->bg_gc = sbi->bg_gc;
	76	si->util_free = (int)(free_user_blocks(sbi) >> sbi->log_blocks_per_seg)
	77	* 100 / (int)(sbi->user_block_count >> sbi->log_blocks_per_seg)
	78	/ 2;
	79	si->util_valid = (int)(written_block_count(sbi) >>
	80	sbi->log_blocks_per_seg)
	81	* 100 / (int)(sbi->user_block_count >> sbi->log_blocks_per_seg)
	82	/ 2;
	83	si->util_invalid = 50 - si->util_free - si->util_valid;
	84	for (i = CURSEG_HOT_DATA; i <= CURSEG_COLD_NODE; i++) {
	85	struct curseg_info *curseg = CURSEG_I(sbi, i);
	86	si->curseg[i] = curseg->segno;
	87	si->cursec[i] = curseg->segno / sbi->segs_per_sec;
	88	si->curzone[i] = si->cursec[i] / sbi->secs_per_zone;
	89	}
	90
	91	for (i = 0; i < 2; i++) {
	92	si->segment_count[i] = sbi->segment_count[i];
	93	si->block_count[i] = sbi->block_count[i];
	94	}
b9a2c252 CL	95
b9a2c252 CL	96	si->inplace_count = atomic_read(&sbi->inplace_count);
902829aa GKH	97	}
902829aa GKH	98
0a8165d7	99	/*
902829aa GKH	100	* This function calculates BDF of every segments
	101	*/
	102	static void update_sit_info(struct f2fs_sb_info *sbi)
	103	{
963d4f7d	104	struct f2fs_stat_info *si = F2FS_STAT(sbi);
3589a919 JK	105	unsigned long long blks_per_sec, hblks_per_sec, total_vblocks;
3589a919 JK	106	unsigned long long bimodal, dist;
902829aa GKH	107	unsigned int segno, vblocks;
	108	int ndirty = 0;
	109
	110	bimodal = 0;
	111	total_vblocks = 0;
3519e3f9	112	blks_per_sec = sbi->segs_per_sec * sbi->blocks_per_seg;
902829aa	113	hblks_per_sec = blks_per_sec / 2;
7cd8558b	114	for (segno = 0; segno < MAIN_SEGS(sbi); segno += sbi->segs_per_sec) {
902829aa GKH	115	vblocks = get_valid_blocks(sbi, segno, sbi->segs_per_sec);
	116	dist = abs(vblocks - hblks_per_sec);
	117	bimodal += dist * dist;
	118
	119	if (vblocks > 0 && vblocks < blks_per_sec) {
	120	total_vblocks += vblocks;
	121	ndirty++;
	122	}
	123	}
7beb428e	124	dist = div_u64(MAIN_SECS(sbi) * hblks_per_sec * hblks_per_sec, 100);
1d7e10d5	125	si->bimodal = div64_u64(bimodal, dist);
902829aa	126	if (si->dirty_count)
7beb428e	127	si->avg_vblocks = div_u64(total_vblocks, ndirty);
902829aa GKH	128	else
	129	si->avg_vblocks = 0;
	130	}
	131
0a8165d7	132	/*
902829aa GKH	133	* This function calculates memory footprint.
	134	*/
	135	static void update_mem_info(struct f2fs_sb_info *sbi)
	136	{
963d4f7d	137	struct f2fs_stat_info *si = F2FS_STAT(sbi);
902829aa	138	unsigned npages;
8c402946	139	int i;
902829aa GKH	140
	141	if (si->base_mem)
	142	goto get_cache;
	143
	144	si->base_mem = sizeof(struct f2fs_sb_info) + sbi->sb->s_blocksize;
	145	si->base_mem += 2 * sizeof(struct f2fs_inode_info);
	146	si->base_mem += sizeof(*sbi->ckpt);
523be8a6	147	si->base_mem += sizeof(struct percpu_counter) * NR_COUNT_TYPE;
902829aa GKH	148
	149	/* build sm */
	150	si->base_mem += sizeof(struct f2fs_sm_info);
	151
	152	/* build sit */
	153	si->base_mem += sizeof(struct sit_info);
7cd8558b JK	154	si->base_mem += MAIN_SEGS(sbi) * sizeof(struct seg_entry);
7cd8558b JK	155	si->base_mem += f2fs_bitmap_size(MAIN_SEGS(sbi));
a66cdd98	156	si->base_mem += 3 * SIT_VBLOCK_MAP_SIZE * MAIN_SEGS(sbi);
60a3b782	157	si->base_mem += SIT_VBLOCK_MAP_SIZE;
902829aa	158	if (sbi->segs_per_sec > 1)
7cd8558b	159	si->base_mem += MAIN_SECS(sbi) * sizeof(struct sec_entry);
902829aa GKH	160	si->base_mem += __bitmap_size(sbi, SIT_BITMAP);
	161
	162	/* build free segmap */
	163	si->base_mem += sizeof(struct free_segmap_info);
7cd8558b JK	164	si->base_mem += f2fs_bitmap_size(MAIN_SEGS(sbi));
7cd8558b JK	165	si->base_mem += f2fs_bitmap_size(MAIN_SECS(sbi));
902829aa GKH	166
	167	/* build curseg */
	168	si->base_mem += sizeof(struct curseg_info) * NR_CURSEG_TYPE;
09cbfeaf	169	si->base_mem += PAGE_SIZE * NR_CURSEG_TYPE;
902829aa GKH	170
	171	/* build dirty segmap */
	172	si->base_mem += sizeof(struct dirty_seglist_info);
7cd8558b JK	173	si->base_mem += NR_DIRTY_TYPE * f2fs_bitmap_size(MAIN_SEGS(sbi));
7cd8558b JK	174	si->base_mem += f2fs_bitmap_size(MAIN_SECS(sbi));
902829aa	175
e1c42045	176	/* build nm */
902829aa GKH	177	si->base_mem += sizeof(struct f2fs_nm_info);
	178	si->base_mem += __bitmap_size(sbi, NAT_BITMAP);
	179
9066c6a7 CY	180	get_cache:
	181	si->cache_mem = 0;
	182
902829aa	183	/* build gc */
9066c6a7 CY	184	if (sbi->gc_thread)
	185	si->cache_mem += sizeof(struct f2fs_gc_kthread);
	186
	187	/* build merge flush thread */
	188	if (SM_I(sbi)->cmd_control_info)
	189	si->cache_mem += sizeof(struct flush_cmd_control);
902829aa	190
902829aa	191	/* free nids */
9066c6a7 CY	192	si->cache_mem += NM_I(sbi)->fcnt * sizeof(struct free_nid);
9066c6a7 CY	193	si->cache_mem += NM_I(sbi)->nat_cnt * sizeof(struct nat_entry);
6f0aacbc JK	194	si->cache_mem += NM_I(sbi)->dirty_nat_cnt *
	195	sizeof(struct nat_entry_set);
	196	si->cache_mem += si->inmem_pages * sizeof(struct inmem_pages);
652be551	197	for (i = 0; i <= ORPHAN_INO; i++)
67298804	198	si->cache_mem += sbi->im[i].ino_num * sizeof(struct ino_entry);
7441ccef JK	199	si->cache_mem += atomic_read(&sbi->total_ext_tree) *
7441ccef JK	200	sizeof(struct extent_tree);
4bf6fd9f CY	201	si->cache_mem += atomic_read(&sbi->total_ext_node) *
4bf6fd9f CY	202	sizeof(struct extent_node);
6f0aacbc JK	203
	204	si->page_mem = 0;
	205	npages = NODE_MAPPING(sbi)->nrpages;
09cbfeaf	206	si->page_mem += (unsigned long long)npages << PAGE_SHIFT;
6f0aacbc	207	npages = META_MAPPING(sbi)->nrpages;
09cbfeaf	208	si->page_mem += (unsigned long long)npages << PAGE_SHIFT;
902829aa GKH	209	}
	210
	211	static int stat_show(struct seq_file s, void v)
	212	{
145b04e5	213	struct f2fs_stat_info *si;
902829aa GKH	214	int i = 0;
	215	int j;
	216
66af62ce	217	mutex_lock(&f2fs_stat_mutex);
145b04e5	218	list_for_each_entry(si, &f2fs_stat_list, stat_list) {
902829aa GKH	219	update_general_status(si->sbi);
902829aa GKH	220
8c11a53f JK	221	seq_printf(s, "\n=====[ partition info(%pg). #%d, %s]=====\n",
	222	si->sbi->sb->s_bdev, i++,
	223	f2fs_readonly(si->sbi->sb) ? "RO": "RW");
7880ceed HL	224	seq_printf(s, "[SB: 1] [CP: 2] [SIT: %d] [NAT: %d] ",
7880ceed HL	225	si->sit_area_segs, si->nat_area_segs);
902829aa GKH	226	seq_printf(s, "[SSA: %d] [MAIN: %d",
	227	si->ssa_area_segs, si->main_area_segs);
	228	seq_printf(s, "(OverProv:%d Resv:%d)]\n\n",
	229	si->overp_segs, si->rsvd_segs);
	230	seq_printf(s, "Utilization: %d%% (%d valid blocks)\n",
	231	si->utilization, si->valid_count);
	232	seq_printf(s, " - Node: %u (Inode: %u, ",
	233	si->valid_node_count, si->valid_inode_count);
	234	seq_printf(s, "Other: %u)\n - Data: %u\n",
	235	si->valid_node_count - si->valid_inode_count,
	236	si->valid_count - si->valid_node_count);
d5e8f6c9 CY	237	seq_printf(s, " - Inline_xattr Inode: %u\n",
d5e8f6c9 CY	238	si->inline_xattr);
0dbdc2ae JK	239	seq_printf(s, " - Inline_data Inode: %u\n",
0dbdc2ae JK	240	si->inline_inode);
3289c061 JK	241	seq_printf(s, " - Inline_dentry Inode: %u\n",
3289c061 JK	242	si->inline_dir);
652be551 JK	243	seq_printf(s, " - Orphan Inode: %u\n",
652be551 JK	244	si->orphans);
902829aa GKH	245	seq_printf(s, "\nMain area: %d segs, %d secs %d zones\n",
	246	si->main_area_segs, si->main_area_sections,
	247	si->main_area_zones);
	248	seq_printf(s, " - COLD data: %d, %d, %d\n",
	249	si->curseg[CURSEG_COLD_DATA],
	250	si->cursec[CURSEG_COLD_DATA],
	251	si->curzone[CURSEG_COLD_DATA]);
	252	seq_printf(s, " - WARM data: %d, %d, %d\n",
	253	si->curseg[CURSEG_WARM_DATA],
	254	si->cursec[CURSEG_WARM_DATA],
	255	si->curzone[CURSEG_WARM_DATA]);
	256	seq_printf(s, " - HOT data: %d, %d, %d\n",
	257	si->curseg[CURSEG_HOT_DATA],
	258	si->cursec[CURSEG_HOT_DATA],
	259	si->curzone[CURSEG_HOT_DATA]);
	260	seq_printf(s, " - Dir dnode: %d, %d, %d\n",
	261	si->curseg[CURSEG_HOT_NODE],
	262	si->cursec[CURSEG_HOT_NODE],
	263	si->curzone[CURSEG_HOT_NODE]);
	264	seq_printf(s, " - File dnode: %d, %d, %d\n",
	265	si->curseg[CURSEG_WARM_NODE],
	266	si->cursec[CURSEG_WARM_NODE],
	267	si->curzone[CURSEG_WARM_NODE]);
	268	seq_printf(s, " - Indir nodes: %d, %d, %d\n",
	269	si->curseg[CURSEG_COLD_NODE],
	270	si->cursec[CURSEG_COLD_NODE],
	271	si->curzone[CURSEG_COLD_NODE]);
	272	seq_printf(s, "\n - Valid: %d\n - Dirty: %d\n",
	273	si->main_area_segs - si->dirty_count -
	274	si->prefree_count - si->free_segs,
	275	si->dirty_count);
	276	seq_printf(s, " - Prefree: %d\n - Free: %d (%d)\n\n",
	277	si->prefree_count, si->free_segs, si->free_secs);
42190d2a JK	278	seq_printf(s, "CP calls: %d (BG: %d)\n",
42190d2a JK	279	si->cp_count, si->bg_cp_count);
902829aa GKH	280	seq_printf(s, "GC calls: %d (BG: %d)\n",
902829aa GKH	281	si->call_count, si->bg_gc);
e1235983 CL	282	seq_printf(s, " - data segments : %d (%d)\n",
	283	si->data_segs, si->bg_data_segs);
	284	seq_printf(s, " - node segments : %d (%d)\n",
	285	si->node_segs, si->bg_node_segs);
	286	seq_printf(s, "Try to move %d blocks (BG: %d)\n", si->tot_blks,
	287	si->bg_data_blks + si->bg_node_blks);
	288	seq_printf(s, " - data blocks : %d (%d)\n", si->data_blks,
	289	si->bg_data_blks);
	290	seq_printf(s, " - node blocks : %d (%d)\n", si->node_blks,
	291	si->bg_node_blks);
029e13cc	292	seq_puts(s, "\nExtent Cache:\n");
5b7ee374	293	seq_printf(s, " - Hit Count: L1-1:%llu L1-2:%llu L2:%llu\n",
91c481ff	294	si->hit_largest, si->hit_cached,
029e13cc	295	si->hit_rbtree);
5b7ee374	296	seq_printf(s, " - Hit Ratio: %llu%% (%llu / %llu)\n",
029e13cc	297	!si->total_ext ? 0 :
5b7ee374	298	div64_u64(si->hit_total * 100, si->total_ext),
029e13cc	299	si->hit_total, si->total_ext);
c00ba554 JK	300	seq_printf(s, " - Inner Struct Count: tree: %d(%d), node: %d\n",
c00ba554 JK	301	si->ext_tree, si->zombie_tree, si->ext_node);
6c311ec6	302	seq_puts(s, "\nBalancing F2FS Async:\n");
523be8a6	303	seq_printf(s, " - inmem: %4lld, wb_bios: %4d\n",
f5730184	304	si->inmem_pages, si->wb_bios);
523be8a6	305	seq_printf(s, " - nodes: %4lld in %4d\n",
902829aa	306	si->ndirty_node, si->node_pages);
523be8a6	307	seq_printf(s, " - dents: %4lld in dirs:%4d\n",
902829aa	308	si->ndirty_dent, si->ndirty_dirs);
523be8a6	309	seq_printf(s, " - datas: %4lld in files:%4d\n",
33fbd510	310	si->ndirty_data, si->ndirty_files);
523be8a6	311	seq_printf(s, " - meta: %4lld in %4d\n",
902829aa	312	si->ndirty_meta, si->meta_pages);
dd4e4b59 JK	313	seq_printf(s, " - NATs: %9d/%9d\n - SITs: %9d/%9d\n",
dd4e4b59 JK	314	si->dirty_nats, si->nats, si->dirty_sits, si->sits);
a5f42010 JK	315	seq_printf(s, " - free_nids: %9d\n",
a5f42010 JK	316	si->fnids);
2d219c51 GZ	317	seq_puts(s, "\nDistribution of User Blocks:");
	318	seq_puts(s, " [ valid \| invalid \| free ]\n");
	319	seq_puts(s, " [");
902829aa GKH	320
902829aa GKH	321	for (j = 0; j < si->util_valid; j++)
2d219c51 GZ	322	seq_putc(s, '-');
2d219c51 GZ	323	seq_putc(s, '\|');
902829aa GKH	324
902829aa GKH	325	for (j = 0; j < si->util_invalid; j++)
2d219c51 GZ	326	seq_putc(s, '-');
2d219c51 GZ	327	seq_putc(s, '\|');
902829aa GKH	328
902829aa GKH	329	for (j = 0; j < si->util_free; j++)
2d219c51 GZ	330	seq_putc(s, '-');
2d219c51 GZ	331	seq_puts(s, "]\n\n");
b9a2c252	332	seq_printf(s, "IPU: %u blocks\n", si->inplace_count);
902829aa GKH	333	seq_printf(s, "SSR: %u blocks in %u segments\n",
	334	si->block_count[SSR], si->segment_count[SSR]);
	335	seq_printf(s, "LFS: %u blocks in %u segments\n",
	336	si->block_count[LFS], si->segment_count[LFS]);
	337
	338	/* segment usage info */
	339	update_sit_info(si->sbi);
	340	seq_printf(s, "\nBDF: %u, avg. vblocks: %u\n",
	341	si->bimodal, si->avg_vblocks);
	342
	343	/* memory footprint */
	344	update_mem_info(si->sbi);
9edcdabf	345	seq_printf(s, "\nMemory: %llu KB\n",
6f0aacbc	346	(si->base_mem + si->cache_mem + si->page_mem) >> 10);
9edcdabf	347	seq_printf(s, " - static: %llu KB\n",
6f0aacbc	348	si->base_mem >> 10);
9edcdabf	349	seq_printf(s, " - cached: %llu KB\n",
6f0aacbc	350	si->cache_mem >> 10);
9edcdabf	351	seq_printf(s, " - paged : %llu KB\n",
6f0aacbc	352	si->page_mem >> 10);
902829aa	353	}
66af62ce	354	mutex_unlock(&f2fs_stat_mutex);
902829aa GKH	355	return 0;
	356	}
	357
	358	static int stat_open(struct inode inode, struct file file)
	359	{
	360	return single_open(file, stat_show, inode->i_private);
	361	}
	362
	363	static const struct file_operations stat_fops = {
	364	.open = stat_open,
	365	.read = seq_read,
	366	.llseek = seq_lseek,
	367	.release = single_release,
	368	};
	369
4589d25d	370	int f2fs_build_stats(struct f2fs_sb_info *sbi)
902829aa GKH	371	{
	372	struct f2fs_super_block *raw_super = F2FS_RAW_SUPER(sbi);
	373	struct f2fs_stat_info *si;
	374
963d4f7d GZ	375	si = kzalloc(sizeof(struct f2fs_stat_info), GFP_KERNEL);
963d4f7d GZ	376	if (!si)
902829aa GKH	377	return -ENOMEM;
902829aa GKH	378
902829aa GKH	379	si->all_area_segs = le32_to_cpu(raw_super->segment_count);
	380	si->sit_area_segs = le32_to_cpu(raw_super->segment_count_sit);
	381	si->nat_area_segs = le32_to_cpu(raw_super->segment_count_nat);
	382	si->ssa_area_segs = le32_to_cpu(raw_super->segment_count_ssa);
	383	si->main_area_segs = le32_to_cpu(raw_super->segment_count_main);
	384	si->main_area_sections = le32_to_cpu(raw_super->section_count);
	385	si->main_area_zones = si->main_area_sections /
	386	le32_to_cpu(raw_super->secs_per_zone);
	387	si->sbi = sbi;
963d4f7d	388	sbi->stat_info = si;
66af62ce	389
5b7ee374 CY	390	atomic64_set(&sbi->total_hit_ext, 0);
	391	atomic64_set(&sbi->read_hit_rbtree, 0);
	392	atomic64_set(&sbi->read_hit_largest, 0);
	393	atomic64_set(&sbi->read_hit_cached, 0);
727edac5	394
d5e8f6c9	395	atomic_set(&sbi->inline_xattr, 0);
03e14d52 CY	396	atomic_set(&sbi->inline_inode, 0);
03e14d52 CY	397	atomic_set(&sbi->inline_dir, 0);
b9a2c252	398	atomic_set(&sbi->inplace_count, 0);
03e14d52	399
66af62ce	400	mutex_lock(&f2fs_stat_mutex);
	401	list_add_tail(&si->stat_list, &f2fs_stat_list);
	402	mutex_unlock(&f2fs_stat_mutex);
	403
902829aa GKH	404	return 0;
	405	}
	406
902829aa GKH	407	void f2fs_destroy_stats(struct f2fs_sb_info *sbi)
902829aa GKH	408	{
963d4f7d	409	struct f2fs_stat_info *si = F2FS_STAT(sbi);
902829aa	410
66af62ce	411	mutex_lock(&f2fs_stat_mutex);
902829aa	412	list_del(&si->stat_list);
66af62ce	413	mutex_unlock(&f2fs_stat_mutex);
66af62ce	414
963d4f7d	415	kfree(si);
902829aa GKH	416	}
902829aa GKH	417
787c7b8c	418	int __init f2fs_create_root_stats(void)
4589d25d	419	{
c524723e YL	420	struct dentry *file;
c524723e YL	421
40e1ebe9 YL	422	f2fs_debugfs_root = debugfs_create_dir("f2fs", NULL);
40e1ebe9 YL	423	if (!f2fs_debugfs_root)
787c7b8c	424	return -ENOMEM;
c524723e	425
40e1ebe9	426	file = debugfs_create_file("status", S_IRUGO, f2fs_debugfs_root,
c524723e	427	NULL, &stat_fops);
7a6c76b1 GZ	428	if (!file) {
	429	debugfs_remove(f2fs_debugfs_root);
	430	f2fs_debugfs_root = NULL;
787c7b8c	431	return -ENOMEM;
7a6c76b1	432	}
787c7b8c CY	433
787c7b8c CY	434	return 0;
4589d25d NJ	435	}
	436
	437	void f2fs_destroy_root_stats(void)
902829aa	438	{
40e1ebe9	439	if (!f2fs_debugfs_root)
c524723e YL	440	return;
c524723e YL	441
40e1ebe9 YL	442	debugfs_remove_recursive(f2fs_debugfs_root);
40e1ebe9 YL	443	f2fs_debugfs_root = NULL;
902829aa	444	}