[mirror_ubuntu-zesty-kernel.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_ext = sbi->read_hit_ext;
	si->total_ext = sbi->total_hit_ext;
	si->ndirty_node = get_pages(sbi, F2FS_DIRTY_NODES);
	si->ndirty_dent = get_pages(sbi, F2FS_DIRTY_DENTS);
	si->ndirty_dirs = sbi->n_dirty_dirs;
	si->ndirty_meta = get_pages(sbi, F2FS_DIRTY_META);
	si->inmem_pages = get_pages(sbi, F2FS_INMEM_PAGES);
	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_inode = atomic_read(&sbi->inline_inode);
	si->inline_dir = atomic_read(&sbi->inline_dir);
	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->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 int blks_per_sec, hblks_per_sec, total_vblocks, bimodal, dist;
	unsigned int segno, vblocks;
	int ndirty = 0;

	bimodal = 0;
	total_vblocks = 0;
	blks_per_sec = sbi->segs_per_sec * (1 << sbi->log_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 = MAIN_SECS(sbi) * hblks_per_sec * hblks_per_sec / 100;
	si->bimodal = bimodal / dist;
	if (si->dirty_count)
		si->avg_vblocks = 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);

	/* 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 += 2 * SIT_VBLOCK_MAP_SIZE * MAIN_SEGS(sbi);
	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_CACHE_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);

	/* build gc */
	si->base_mem += sizeof(struct f2fs_gc_kthread);

get_cache:
	/* free nids */
	si->cache_mem = NM_I(sbi)->fcnt;
	si->cache_mem += NM_I(sbi)->nat_cnt;
	npages = NODE_MAPPING(sbi)->nrpages;
	si->cache_mem += npages << PAGE_CACHE_SHIFT;
	npages = META_MAPPING(sbi)->nrpages;
	si->cache_mem += npages << PAGE_CACHE_SHIFT;
	si->cache_mem += sbi->n_dirty_dirs * sizeof(struct inode_entry);
	for (i = 0; i <= UPDATE_INO; i++)
		si->cache_mem += sbi->im[i].ino_num * sizeof(struct ino_entry);
}

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) {
		char devname[BDEVNAME_SIZE];

		update_general_status(si->sbi);

		seq_printf(s, "\n=====[ partition info(%s). #%d ]=====\n",
			bdevname(si->sbi->sb->s_bdev, devname), i++);
		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_data Inode: %u\n",
			   si->inline_inode);
		seq_printf(s, "  - Inline_dentry Inode: %u\n",
			   si->inline_dir);
		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\n", si->cp_count);
		seq_printf(s, "GC calls: %d (BG: %d)\n",
			   si->call_count, si->bg_gc);
		seq_printf(s, "  - data segments : %d\n", si->data_segs);
		seq_printf(s, "  - node segments : %d\n", si->node_segs);
		seq_printf(s, "Try to move %d blocks\n", si->tot_blks);
		seq_printf(s, "  - data blocks : %d\n", si->data_blks);
		seq_printf(s, "  - node blocks : %d\n", si->node_blks);
		seq_printf(s, "\nExtent Hit Ratio: %d / %d\n",
			   si->hit_ext, si->total_ext);
		seq_puts(s, "\nBalancing F2FS Async:\n");
		seq_printf(s, "  - inmem: %4d\n",
			   si->inmem_pages);
		seq_printf(s, "  - nodes: %4d in %4d\n",
			   si->ndirty_node, si->node_pages);
		seq_printf(s, "  - dents: %4d in dirs:%4d\n",
			   si->ndirty_dent, si->ndirty_dirs);
		seq_printf(s, "  - meta: %4d in %4d\n",
			   si->ndirty_meta, si->meta_pages);
		seq_printf(s, "  - NATs: %9d\n  - SITs: %9d\n",
			   si->nats, 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: %u KB = static: %u + cached: %u\n",
				(si->base_mem + si->cache_mem) >> 10,
				si->base_mem >> 10, si->cache_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;

	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);
}

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

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

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

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 */
902829aa GKH	36	si->hit_ext = sbi->read_hit_ext;
	37	si->total_ext = sbi->total_hit_ext;
	38	si->ndirty_node = get_pages(sbi, F2FS_DIRTY_NODES);
	39	si->ndirty_dent = get_pages(sbi, F2FS_DIRTY_DENTS);
	40	si->ndirty_dirs = sbi->n_dirty_dirs;
	41	si->ndirty_meta = get_pages(sbi, F2FS_DIRTY_META);
8dcf2ff7	42	si->inmem_pages = get_pages(sbi, F2FS_INMEM_PAGES);
902829aa GKH	43	si->total_count = (int)sbi->user_block_count / sbi->blocks_per_seg;
	44	si->rsvd_segs = reserved_segments(sbi);
	45	si->overp_segs = overprovision_segments(sbi);
	46	si->valid_count = valid_user_blocks(sbi);
	47	si->valid_node_count = valid_node_count(sbi);
	48	si->valid_inode_count = valid_inode_count(sbi);
03e14d52 CY	49	si->inline_inode = atomic_read(&sbi->inline_inode);
03e14d52 CY	50	si->inline_dir = atomic_read(&sbi->inline_dir);
902829aa GKH	51	si->utilization = utilization(sbi);
	52
	53	si->free_segs = free_segments(sbi);
	54	si->free_secs = free_sections(sbi);
	55	si->prefree_count = prefree_segments(sbi);
	56	si->dirty_count = dirty_segments(sbi);
4ef51a8f	57	si->node_pages = NODE_MAPPING(sbi)->nrpages;
9df27d98	58	si->meta_pages = META_MAPPING(sbi)->nrpages;
902829aa GKH	59	si->nats = NM_I(sbi)->nat_cnt;
	60	si->sits = SIT_I(sbi)->dirty_sentries;
	61	si->fnids = NM_I(sbi)->fcnt;
	62	si->bg_gc = sbi->bg_gc;
	63	si->util_free = (int)(free_user_blocks(sbi) >> sbi->log_blocks_per_seg)
	64	* 100 / (int)(sbi->user_block_count >> sbi->log_blocks_per_seg)
	65	/ 2;
	66	si->util_valid = (int)(written_block_count(sbi) >>
	67	sbi->log_blocks_per_seg)
	68	* 100 / (int)(sbi->user_block_count >> sbi->log_blocks_per_seg)
	69	/ 2;
	70	si->util_invalid = 50 - si->util_free - si->util_valid;
	71	for (i = CURSEG_HOT_DATA; i <= CURSEG_COLD_NODE; i++) {
	72	struct curseg_info *curseg = CURSEG_I(sbi, i);
	73	si->curseg[i] = curseg->segno;
	74	si->cursec[i] = curseg->segno / sbi->segs_per_sec;
	75	si->curzone[i] = si->cursec[i] / sbi->secs_per_zone;
	76	}
	77
	78	for (i = 0; i < 2; i++) {
	79	si->segment_count[i] = sbi->segment_count[i];
	80	si->block_count[i] = sbi->block_count[i];
	81	}
b9a2c252 CL	82
b9a2c252 CL	83	si->inplace_count = atomic_read(&sbi->inplace_count);
902829aa GKH	84	}
902829aa GKH	85
0a8165d7	86	/*
902829aa GKH	87	* This function calculates BDF of every segments
	88	*/
	89	static void update_sit_info(struct f2fs_sb_info *sbi)
	90	{
963d4f7d	91	struct f2fs_stat_info *si = F2FS_STAT(sbi);
902829aa	92	unsigned int blks_per_sec, hblks_per_sec, total_vblocks, bimodal, dist;
902829aa GKH	93	unsigned int segno, vblocks;
	94	int ndirty = 0;
	95
	96	bimodal = 0;
	97	total_vblocks = 0;
	98	blks_per_sec = sbi->segs_per_sec * (1 << sbi->log_blocks_per_seg);
	99	hblks_per_sec = blks_per_sec / 2;
7cd8558b	100	for (segno = 0; segno < MAIN_SEGS(sbi); segno += sbi->segs_per_sec) {
902829aa GKH	101	vblocks = get_valid_blocks(sbi, segno, sbi->segs_per_sec);
	102	dist = abs(vblocks - hblks_per_sec);
	103	bimodal += dist * dist;
	104
	105	if (vblocks > 0 && vblocks < blks_per_sec) {
	106	total_vblocks += vblocks;
	107	ndirty++;
	108	}
	109	}
7cd8558b	110	dist = MAIN_SECS(sbi) * hblks_per_sec * hblks_per_sec / 100;
902829aa GKH	111	si->bimodal = bimodal / dist;
	112	if (si->dirty_count)
	113	si->avg_vblocks = total_vblocks / ndirty;
	114	else
	115	si->avg_vblocks = 0;
	116	}
	117
0a8165d7	118	/*
902829aa GKH	119	* This function calculates memory footprint.
	120	*/
	121	static void update_mem_info(struct f2fs_sb_info *sbi)
	122	{
963d4f7d	123	struct f2fs_stat_info *si = F2FS_STAT(sbi);
902829aa	124	unsigned npages;
8c402946	125	int i;
902829aa GKH	126
	127	if (si->base_mem)
	128	goto get_cache;
	129
	130	si->base_mem = sizeof(struct f2fs_sb_info) + sbi->sb->s_blocksize;
	131	si->base_mem += 2 * sizeof(struct f2fs_inode_info);
	132	si->base_mem += sizeof(*sbi->ckpt);
	133
	134	/* build sm */
	135	si->base_mem += sizeof(struct f2fs_sm_info);
	136
	137	/* build sit */
	138	si->base_mem += sizeof(struct sit_info);
7cd8558b JK	139	si->base_mem += MAIN_SEGS(sbi) * sizeof(struct seg_entry);
	140	si->base_mem += f2fs_bitmap_size(MAIN_SEGS(sbi));
	141	si->base_mem += 2 * SIT_VBLOCK_MAP_SIZE * MAIN_SEGS(sbi);
902829aa	142	if (sbi->segs_per_sec > 1)
7cd8558b	143	si->base_mem += MAIN_SECS(sbi) * sizeof(struct sec_entry);
902829aa GKH	144	si->base_mem += __bitmap_size(sbi, SIT_BITMAP);
	145
	146	/* build free segmap */
	147	si->base_mem += sizeof(struct free_segmap_info);
7cd8558b JK	148	si->base_mem += f2fs_bitmap_size(MAIN_SEGS(sbi));
7cd8558b JK	149	si->base_mem += f2fs_bitmap_size(MAIN_SECS(sbi));
902829aa GKH	150
	151	/* build curseg */
	152	si->base_mem += sizeof(struct curseg_info) * NR_CURSEG_TYPE;
	153	si->base_mem += PAGE_CACHE_SIZE * NR_CURSEG_TYPE;
	154
	155	/* build dirty segmap */
	156	si->base_mem += sizeof(struct dirty_seglist_info);
7cd8558b JK	157	si->base_mem += NR_DIRTY_TYPE * f2fs_bitmap_size(MAIN_SEGS(sbi));
7cd8558b JK	158	si->base_mem += f2fs_bitmap_size(MAIN_SECS(sbi));
902829aa	159
e1c42045	160	/* build nm */
902829aa GKH	161	si->base_mem += sizeof(struct f2fs_nm_info);
	162	si->base_mem += __bitmap_size(sbi, NAT_BITMAP);
	163
	164	/* build gc */
	165	si->base_mem += sizeof(struct f2fs_gc_kthread);
	166
	167	get_cache:
	168	/* free nids */
	169	si->cache_mem = NM_I(sbi)->fcnt;
	170	si->cache_mem += NM_I(sbi)->nat_cnt;
4ef51a8f	171	npages = NODE_MAPPING(sbi)->nrpages;
902829aa	172	si->cache_mem += npages << PAGE_CACHE_SHIFT;
9df27d98	173	npages = META_MAPPING(sbi)->nrpages;
902829aa	174	si->cache_mem += npages << PAGE_CACHE_SHIFT;
06292073	175	si->cache_mem += sbi->n_dirty_dirs * sizeof(struct inode_entry);
8c402946	176	for (i = 0; i <= UPDATE_INO; i++)
67298804	177	si->cache_mem += sbi->im[i].ino_num * sizeof(struct ino_entry);
902829aa GKH	178	}
	179
	180	static int stat_show(struct seq_file s, void v)
	181	{
145b04e5	182	struct f2fs_stat_info *si;
902829aa GKH	183	int i = 0;
	184	int j;
	185
66af62ce	186	mutex_lock(&f2fs_stat_mutex);
145b04e5	187	list_for_each_entry(si, &f2fs_stat_list, stat_list) {
f83759e2	188	char devname[BDEVNAME_SIZE];
902829aa	189
902829aa GKH	190	update_general_status(si->sbi);
902829aa GKH	191
f83759e2	192	seq_printf(s, "\n=====[ partition info(%s). #%d ]=====\n",
f83759e2	193	bdevname(si->sbi->sb->s_bdev, devname), i++);
7880ceed HL	194	seq_printf(s, "[SB: 1] [CP: 2] [SIT: %d] [NAT: %d] ",
7880ceed HL	195	si->sit_area_segs, si->nat_area_segs);
902829aa GKH	196	seq_printf(s, "[SSA: %d] [MAIN: %d",
	197	si->ssa_area_segs, si->main_area_segs);
	198	seq_printf(s, "(OverProv:%d Resv:%d)]\n\n",
	199	si->overp_segs, si->rsvd_segs);
	200	seq_printf(s, "Utilization: %d%% (%d valid blocks)\n",
	201	si->utilization, si->valid_count);
	202	seq_printf(s, " - Node: %u (Inode: %u, ",
	203	si->valid_node_count, si->valid_inode_count);
	204	seq_printf(s, "Other: %u)\n - Data: %u\n",
	205	si->valid_node_count - si->valid_inode_count,
	206	si->valid_count - si->valid_node_count);
0dbdc2ae JK	207	seq_printf(s, " - Inline_data Inode: %u\n",
0dbdc2ae JK	208	si->inline_inode);
3289c061 JK	209	seq_printf(s, " - Inline_dentry Inode: %u\n",
3289c061 JK	210	si->inline_dir);
902829aa GKH	211	seq_printf(s, "\nMain area: %d segs, %d secs %d zones\n",
	212	si->main_area_segs, si->main_area_sections,
	213	si->main_area_zones);
	214	seq_printf(s, " - COLD data: %d, %d, %d\n",
	215	si->curseg[CURSEG_COLD_DATA],
	216	si->cursec[CURSEG_COLD_DATA],
	217	si->curzone[CURSEG_COLD_DATA]);
	218	seq_printf(s, " - WARM data: %d, %d, %d\n",
	219	si->curseg[CURSEG_WARM_DATA],
	220	si->cursec[CURSEG_WARM_DATA],
	221	si->curzone[CURSEG_WARM_DATA]);
	222	seq_printf(s, " - HOT data: %d, %d, %d\n",
	223	si->curseg[CURSEG_HOT_DATA],
	224	si->cursec[CURSEG_HOT_DATA],
	225	si->curzone[CURSEG_HOT_DATA]);
	226	seq_printf(s, " - Dir dnode: %d, %d, %d\n",
	227	si->curseg[CURSEG_HOT_NODE],
	228	si->cursec[CURSEG_HOT_NODE],
	229	si->curzone[CURSEG_HOT_NODE]);
	230	seq_printf(s, " - File dnode: %d, %d, %d\n",
	231	si->curseg[CURSEG_WARM_NODE],
	232	si->cursec[CURSEG_WARM_NODE],
	233	si->curzone[CURSEG_WARM_NODE]);
	234	seq_printf(s, " - Indir nodes: %d, %d, %d\n",
	235	si->curseg[CURSEG_COLD_NODE],
	236	si->cursec[CURSEG_COLD_NODE],
	237	si->curzone[CURSEG_COLD_NODE]);
	238	seq_printf(s, "\n - Valid: %d\n - Dirty: %d\n",
	239	si->main_area_segs - si->dirty_count -
	240	si->prefree_count - si->free_segs,
	241	si->dirty_count);
	242	seq_printf(s, " - Prefree: %d\n - Free: %d (%d)\n\n",
	243	si->prefree_count, si->free_segs, si->free_secs);
942e0be6	244	seq_printf(s, "CP calls: %d\n", si->cp_count);
902829aa GKH	245	seq_printf(s, "GC calls: %d (BG: %d)\n",
	246	si->call_count, si->bg_gc);
	247	seq_printf(s, " - data segments : %d\n", si->data_segs);
	248	seq_printf(s, " - node segments : %d\n", si->node_segs);
	249	seq_printf(s, "Try to move %d blocks\n", si->tot_blks);
	250	seq_printf(s, " - data blocks : %d\n", si->data_blks);
	251	seq_printf(s, " - node blocks : %d\n", si->node_blks);
	252	seq_printf(s, "\nExtent Hit Ratio: %d / %d\n",
	253	si->hit_ext, si->total_ext);
6c311ec6	254	seq_puts(s, "\nBalancing F2FS Async:\n");
8dcf2ff7 JK	255	seq_printf(s, " - inmem: %4d\n",
8dcf2ff7 JK	256	si->inmem_pages);
499046ab	257	seq_printf(s, " - nodes: %4d in %4d\n",
902829aa	258	si->ndirty_node, si->node_pages);
499046ab	259	seq_printf(s, " - dents: %4d in dirs:%4d\n",
902829aa	260	si->ndirty_dent, si->ndirty_dirs);
499046ab	261	seq_printf(s, " - meta: %4d in %4d\n",
902829aa	262	si->ndirty_meta, si->meta_pages);
a5f42010 JK	263	seq_printf(s, " - NATs: %9d\n - SITs: %9d\n",
	264	si->nats, si->sits);
	265	seq_printf(s, " - free_nids: %9d\n",
	266	si->fnids);
2d219c51 GZ	267	seq_puts(s, "\nDistribution of User Blocks:");
	268	seq_puts(s, " [ valid \| invalid \| free ]\n");
	269	seq_puts(s, " [");
902829aa GKH	270
902829aa GKH	271	for (j = 0; j < si->util_valid; j++)
2d219c51 GZ	272	seq_putc(s, '-');
2d219c51 GZ	273	seq_putc(s, '\|');
902829aa GKH	274
902829aa GKH	275	for (j = 0; j < si->util_invalid; j++)
2d219c51 GZ	276	seq_putc(s, '-');
2d219c51 GZ	277	seq_putc(s, '\|');
902829aa GKH	278
902829aa GKH	279	for (j = 0; j < si->util_free; j++)
2d219c51 GZ	280	seq_putc(s, '-');
2d219c51 GZ	281	seq_puts(s, "]\n\n");
b9a2c252	282	seq_printf(s, "IPU: %u blocks\n", si->inplace_count);
902829aa GKH	283	seq_printf(s, "SSR: %u blocks in %u segments\n",
	284	si->block_count[SSR], si->segment_count[SSR]);
	285	seq_printf(s, "LFS: %u blocks in %u segments\n",
	286	si->block_count[LFS], si->segment_count[LFS]);
	287
	288	/* segment usage info */
	289	update_sit_info(si->sbi);
	290	seq_printf(s, "\nBDF: %u, avg. vblocks: %u\n",
	291	si->bimodal, si->avg_vblocks);
	292
	293	/* memory footprint */
	294	update_mem_info(si->sbi);
	295	seq_printf(s, "\nMemory: %u KB = static: %u + cached: %u\n",
	296	(si->base_mem + si->cache_mem) >> 10,
	297	si->base_mem >> 10, si->cache_mem >> 10);
902829aa	298	}
66af62ce	299	mutex_unlock(&f2fs_stat_mutex);
902829aa GKH	300	return 0;
	301	}
	302
	303	static int stat_open(struct inode inode, struct file file)
	304	{
	305	return single_open(file, stat_show, inode->i_private);
	306	}
	307
	308	static const struct file_operations stat_fops = {
	309	.open = stat_open,
	310	.read = seq_read,
	311	.llseek = seq_lseek,
	312	.release = single_release,
	313	};
	314
4589d25d	315	int f2fs_build_stats(struct f2fs_sb_info *sbi)
902829aa GKH	316	{
	317	struct f2fs_super_block *raw_super = F2FS_RAW_SUPER(sbi);
	318	struct f2fs_stat_info *si;
	319
963d4f7d GZ	320	si = kzalloc(sizeof(struct f2fs_stat_info), GFP_KERNEL);
963d4f7d GZ	321	if (!si)
902829aa GKH	322	return -ENOMEM;
902829aa GKH	323
902829aa GKH	324	si->all_area_segs = le32_to_cpu(raw_super->segment_count);
	325	si->sit_area_segs = le32_to_cpu(raw_super->segment_count_sit);
	326	si->nat_area_segs = le32_to_cpu(raw_super->segment_count_nat);
	327	si->ssa_area_segs = le32_to_cpu(raw_super->segment_count_ssa);
	328	si->main_area_segs = le32_to_cpu(raw_super->segment_count_main);
	329	si->main_area_sections = le32_to_cpu(raw_super->section_count);
	330	si->main_area_zones = si->main_area_sections /
	331	le32_to_cpu(raw_super->secs_per_zone);
	332	si->sbi = sbi;
963d4f7d	333	sbi->stat_info = si;
66af62ce	334
03e14d52 CY	335	atomic_set(&sbi->inline_inode, 0);
03e14d52 CY	336	atomic_set(&sbi->inline_dir, 0);
b9a2c252	337	atomic_set(&sbi->inplace_count, 0);
03e14d52	338
66af62ce	339	mutex_lock(&f2fs_stat_mutex);
	340	list_add_tail(&si->stat_list, &f2fs_stat_list);
	341	mutex_unlock(&f2fs_stat_mutex);
	342
902829aa GKH	343	return 0;
	344	}
	345
902829aa GKH	346	void f2fs_destroy_stats(struct f2fs_sb_info *sbi)
902829aa GKH	347	{
963d4f7d	348	struct f2fs_stat_info *si = F2FS_STAT(sbi);
902829aa	349
66af62ce	350	mutex_lock(&f2fs_stat_mutex);
902829aa	351	list_del(&si->stat_list);
66af62ce	352	mutex_unlock(&f2fs_stat_mutex);
66af62ce	353
963d4f7d	354	kfree(si);
902829aa GKH	355	}
902829aa GKH	356
4589d25d NJ	357	void __init f2fs_create_root_stats(void)
4589d25d NJ	358	{
c524723e YL	359	struct dentry *file;
c524723e YL	360
40e1ebe9 YL	361	f2fs_debugfs_root = debugfs_create_dir("f2fs", NULL);
40e1ebe9 YL	362	if (!f2fs_debugfs_root)
7a6c76b1	363	return;
c524723e	364
40e1ebe9	365	file = debugfs_create_file("status", S_IRUGO, f2fs_debugfs_root,
c524723e	366	NULL, &stat_fops);
7a6c76b1 GZ	367	if (!file) {
	368	debugfs_remove(f2fs_debugfs_root);
	369	f2fs_debugfs_root = NULL;
	370	}
4589d25d NJ	371	}
	372
	373	void f2fs_destroy_root_stats(void)
902829aa	374	{
40e1ebe9	375	if (!f2fs_debugfs_root)
c524723e YL	376	return;
c524723e YL	377
40e1ebe9 YL	378	debugfs_remove_recursive(f2fs_debugfs_root);
40e1ebe9 YL	379	f2fs_debugfs_root = NULL;
902829aa	380	}