[linux.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 <[email protected]>
 *
 * 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 *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;

	/* valid 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->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->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 = sbi->node_inode->i_mapping->nrpages;
	si->meta_pages = sbi->meta_inode->i_mapping->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];
	}
}

/*
 * 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;
	struct sit_info *sit_i = SIT_I(sbi);
	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;
	mutex_lock(&sit_i->sentry_lock);
	for (segno = 0; segno < TOTAL_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++;
		}
	}
	mutex_unlock(&sit_i->sentry_lock);
	dist = TOTAL_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;

	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 += TOTAL_SEGS(sbi) * sizeof(struct seg_entry);
	si->base_mem += f2fs_bitmap_size(TOTAL_SEGS(sbi));
	si->base_mem += 2 * SIT_VBLOCK_MAP_SIZE * TOTAL_SEGS(sbi);
	if (sbi->segs_per_sec > 1)
		si->base_mem += TOTAL_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(TOTAL_SEGS(sbi));
	si->base_mem += f2fs_bitmap_size(TOTAL_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(TOTAL_SEGS(sbi));
	si->base_mem += f2fs_bitmap_size(TOTAL_SECS(sbi));

	/* buld 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 = sbi->node_inode->i_mapping->nrpages;
	si->cache_mem += npages << PAGE_CACHE_SHIFT;
	npages = sbi->meta_inode->i_mapping->nrpages;
	si->cache_mem += npages << PAGE_CACHE_SHIFT;
	si->cache_mem += sbi->n_orphans * sizeof(struct orphan_inode_entry);
	si->cache_mem += sbi->n_dirty_dirs * sizeof(struct dir_inode_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, "\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, "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_printf(s, "\nBalancing F2FS Async:\n");
		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 %5d > %lu\n",
			   si->nats, NM_WOUT_THRESHOLD);
		seq_printf(s, "  - SITs: %5d\n  - free_nids: %5d\n",
			   si->sits, 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, "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;

	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)
{
	debugfs_root = debugfs_create_dir("f2fs", NULL);
	if (debugfs_root)
		debugfs_create_file("status", S_IRUGO, debugfs_root,
					 NULL, &stat_fops);
}

void f2fs_destroy_root_stats(void)
{
	debugfs_remove_recursive(debugfs_root);
	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 <[email protected]>
	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);
	27	static struct dentry *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;
	34
	35	/* valid check of the segment numbers */
	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);
	42	si->total_count = (int)sbi->user_block_count / sbi->blocks_per_seg;
	43	si->rsvd_segs = reserved_segments(sbi);
	44	si->overp_segs = overprovision_segments(sbi);
	45	si->valid_count = valid_user_blocks(sbi);
	46	si->valid_node_count = valid_node_count(sbi);
	47	si->valid_inode_count = valid_inode_count(sbi);
	48	si->utilization = utilization(sbi);
	49
	50	si->free_segs = free_segments(sbi);
	51	si->free_secs = free_sections(sbi);
	52	si->prefree_count = prefree_segments(sbi);
	53	si->dirty_count = dirty_segments(sbi);
	54	si->node_pages = sbi->node_inode->i_mapping->nrpages;
	55	si->meta_pages = sbi->meta_inode->i_mapping->nrpages;
	56	si->nats = NM_I(sbi)->nat_cnt;
	57	si->sits = SIT_I(sbi)->dirty_sentries;
	58	si->fnids = NM_I(sbi)->fcnt;
	59	si->bg_gc = sbi->bg_gc;
	60	si->util_free = (int)(free_user_blocks(sbi) >> sbi->log_blocks_per_seg)
	61	* 100 / (int)(sbi->user_block_count >> sbi->log_blocks_per_seg)
	62	/ 2;
	63	si->util_valid = (int)(written_block_count(sbi) >>
	64	sbi->log_blocks_per_seg)
	65	* 100 / (int)(sbi->user_block_count >> sbi->log_blocks_per_seg)
	66	/ 2;
	67	si->util_invalid = 50 - si->util_free - si->util_valid;
	68	for (i = CURSEG_HOT_DATA; i <= CURSEG_COLD_NODE; i++) {
	69	struct curseg_info *curseg = CURSEG_I(sbi, i);
	70	si->curseg[i] = curseg->segno;
	71	si->cursec[i] = curseg->segno / sbi->segs_per_sec;
	72	si->curzone[i] = si->cursec[i] / sbi->secs_per_zone;
	73	}
	74
	75	for (i = 0; i < 2; i++) {
	76	si->segment_count[i] = sbi->segment_count[i];
	77	si->block_count[i] = sbi->block_count[i];
	78	}
	79	}
	80
0a8165d7	81	/*
902829aa GKH	82	* This function calculates BDF of every segments
	83	*/
	84	static void update_sit_info(struct f2fs_sb_info *sbi)
	85	{
963d4f7d	86	struct f2fs_stat_info *si = F2FS_STAT(sbi);
902829aa GKH	87	unsigned int blks_per_sec, hblks_per_sec, total_vblocks, bimodal, dist;
	88	struct sit_info *sit_i = SIT_I(sbi);
	89	unsigned int segno, vblocks;
	90	int ndirty = 0;
	91
	92	bimodal = 0;
	93	total_vblocks = 0;
	94	blks_per_sec = sbi->segs_per_sec * (1 << sbi->log_blocks_per_seg);
	95	hblks_per_sec = blks_per_sec / 2;
	96	mutex_lock(&sit_i->sentry_lock);
	97	for (segno = 0; segno < TOTAL_SEGS(sbi); segno += sbi->segs_per_sec) {
	98	vblocks = get_valid_blocks(sbi, segno, sbi->segs_per_sec);
	99	dist = abs(vblocks - hblks_per_sec);
	100	bimodal += dist * dist;
	101
	102	if (vblocks > 0 && vblocks < blks_per_sec) {
	103	total_vblocks += vblocks;
	104	ndirty++;
	105	}
	106	}
	107	mutex_unlock(&sit_i->sentry_lock);
53cf9522	108	dist = TOTAL_SECS(sbi) * hblks_per_sec * hblks_per_sec / 100;
902829aa GKH	109	si->bimodal = bimodal / dist;
	110	if (si->dirty_count)
	111	si->avg_vblocks = total_vblocks / ndirty;
	112	else
	113	si->avg_vblocks = 0;
	114	}
	115
0a8165d7	116	/*
902829aa GKH	117	* This function calculates memory footprint.
	118	*/
	119	static void update_mem_info(struct f2fs_sb_info *sbi)
	120	{
963d4f7d	121	struct f2fs_stat_info *si = F2FS_STAT(sbi);
902829aa GKH	122	unsigned npages;
	123
	124	if (si->base_mem)
	125	goto get_cache;
	126
	127	si->base_mem = sizeof(struct f2fs_sb_info) + sbi->sb->s_blocksize;
	128	si->base_mem += 2 * sizeof(struct f2fs_inode_info);
	129	si->base_mem += sizeof(*sbi->ckpt);
	130
	131	/* build sm */
	132	si->base_mem += sizeof(struct f2fs_sm_info);
	133
	134	/* build sit */
	135	si->base_mem += sizeof(struct sit_info);
	136	si->base_mem += TOTAL_SEGS(sbi) * sizeof(struct seg_entry);
	137	si->base_mem += f2fs_bitmap_size(TOTAL_SEGS(sbi));
	138	si->base_mem += 2 * SIT_VBLOCK_MAP_SIZE * TOTAL_SEGS(sbi);
	139	if (sbi->segs_per_sec > 1)
53cf9522	140	si->base_mem += TOTAL_SECS(sbi) * sizeof(struct sec_entry);
902829aa GKH	141	si->base_mem += __bitmap_size(sbi, SIT_BITMAP);
	142
	143	/* build free segmap */
	144	si->base_mem += sizeof(struct free_segmap_info);
	145	si->base_mem += f2fs_bitmap_size(TOTAL_SEGS(sbi));
53cf9522	146	si->base_mem += f2fs_bitmap_size(TOTAL_SECS(sbi));
902829aa GKH	147
	148	/* build curseg */
	149	si->base_mem += sizeof(struct curseg_info) * NR_CURSEG_TYPE;
	150	si->base_mem += PAGE_CACHE_SIZE * NR_CURSEG_TYPE;
	151
	152	/* build dirty segmap */
	153	si->base_mem += sizeof(struct dirty_seglist_info);
	154	si->base_mem += NR_DIRTY_TYPE * f2fs_bitmap_size(TOTAL_SEGS(sbi));
5ec4e49f	155	si->base_mem += f2fs_bitmap_size(TOTAL_SECS(sbi));
902829aa GKH	156
	157	/* buld nm */
	158	si->base_mem += sizeof(struct f2fs_nm_info);
	159	si->base_mem += __bitmap_size(sbi, NAT_BITMAP);
	160
	161	/* build gc */
	162	si->base_mem += sizeof(struct f2fs_gc_kthread);
	163
	164	get_cache:
	165	/* free nids */
	166	si->cache_mem = NM_I(sbi)->fcnt;
	167	si->cache_mem += NM_I(sbi)->nat_cnt;
	168	npages = sbi->node_inode->i_mapping->nrpages;
	169	si->cache_mem += npages << PAGE_CACHE_SHIFT;
	170	npages = sbi->meta_inode->i_mapping->nrpages;
	171	si->cache_mem += npages << PAGE_CACHE_SHIFT;
	172	si->cache_mem += sbi->n_orphans * sizeof(struct orphan_inode_entry);
	173	si->cache_mem += sbi->n_dirty_dirs * sizeof(struct dir_inode_entry);
	174	}
	175
	176	static int stat_show(struct seq_file s, void v)
	177	{
145b04e5	178	struct f2fs_stat_info *si;
902829aa GKH	179	int i = 0;
	180	int j;
	181
66af62ce	182	mutex_lock(&f2fs_stat_mutex);
145b04e5	183	list_for_each_entry(si, &f2fs_stat_list, stat_list) {
f83759e2	184	char devname[BDEVNAME_SIZE];
902829aa	185
902829aa GKH	186	update_general_status(si->sbi);
902829aa GKH	187
f83759e2	188	seq_printf(s, "\n=====[ partition info(%s). #%d ]=====\n",
f83759e2	189	bdevname(si->sbi->sb->s_bdev, devname), i++);
7880ceed HL	190	seq_printf(s, "[SB: 1] [CP: 2] [SIT: %d] [NAT: %d] ",
7880ceed HL	191	si->sit_area_segs, si->nat_area_segs);
902829aa GKH	192	seq_printf(s, "[SSA: %d] [MAIN: %d",
	193	si->ssa_area_segs, si->main_area_segs);
	194	seq_printf(s, "(OverProv:%d Resv:%d)]\n\n",
	195	si->overp_segs, si->rsvd_segs);
	196	seq_printf(s, "Utilization: %d%% (%d valid blocks)\n",
	197	si->utilization, si->valid_count);
	198	seq_printf(s, " - Node: %u (Inode: %u, ",
	199	si->valid_node_count, si->valid_inode_count);
	200	seq_printf(s, "Other: %u)\n - Data: %u\n",
	201	si->valid_node_count - si->valid_inode_count,
	202	si->valid_count - si->valid_node_count);
	203	seq_printf(s, "\nMain area: %d segs, %d secs %d zones\n",
	204	si->main_area_segs, si->main_area_sections,
	205	si->main_area_zones);
	206	seq_printf(s, " - COLD data: %d, %d, %d\n",
	207	si->curseg[CURSEG_COLD_DATA],
	208	si->cursec[CURSEG_COLD_DATA],
	209	si->curzone[CURSEG_COLD_DATA]);
	210	seq_printf(s, " - WARM data: %d, %d, %d\n",
	211	si->curseg[CURSEG_WARM_DATA],
	212	si->cursec[CURSEG_WARM_DATA],
	213	si->curzone[CURSEG_WARM_DATA]);
	214	seq_printf(s, " - HOT data: %d, %d, %d\n",
	215	si->curseg[CURSEG_HOT_DATA],
	216	si->cursec[CURSEG_HOT_DATA],
	217	si->curzone[CURSEG_HOT_DATA]);
	218	seq_printf(s, " - Dir dnode: %d, %d, %d\n",
	219	si->curseg[CURSEG_HOT_NODE],
	220	si->cursec[CURSEG_HOT_NODE],
	221	si->curzone[CURSEG_HOT_NODE]);
	222	seq_printf(s, " - File dnode: %d, %d, %d\n",
	223	si->curseg[CURSEG_WARM_NODE],
	224	si->cursec[CURSEG_WARM_NODE],
	225	si->curzone[CURSEG_WARM_NODE]);
	226	seq_printf(s, " - Indir nodes: %d, %d, %d\n",
	227	si->curseg[CURSEG_COLD_NODE],
	228	si->cursec[CURSEG_COLD_NODE],
	229	si->curzone[CURSEG_COLD_NODE]);
	230	seq_printf(s, "\n - Valid: %d\n - Dirty: %d\n",
	231	si->main_area_segs - si->dirty_count -
	232	si->prefree_count - si->free_segs,
	233	si->dirty_count);
	234	seq_printf(s, " - Prefree: %d\n - Free: %d (%d)\n\n",
	235	si->prefree_count, si->free_segs, si->free_secs);
	236	seq_printf(s, "GC calls: %d (BG: %d)\n",
	237	si->call_count, si->bg_gc);
	238	seq_printf(s, " - data segments : %d\n", si->data_segs);
	239	seq_printf(s, " - node segments : %d\n", si->node_segs);
	240	seq_printf(s, "Try to move %d blocks\n", si->tot_blks);
	241	seq_printf(s, " - data blocks : %d\n", si->data_blks);
	242	seq_printf(s, " - node blocks : %d\n", si->node_blks);
	243	seq_printf(s, "\nExtent Hit Ratio: %d / %d\n",
	244	si->hit_ext, si->total_ext);
	245	seq_printf(s, "\nBalancing F2FS Async:\n");
	246	seq_printf(s, " - nodes %4d in %4d\n",
	247	si->ndirty_node, si->node_pages);
	248	seq_printf(s, " - dents %4d in dirs:%4d\n",
	249	si->ndirty_dent, si->ndirty_dirs);
	250	seq_printf(s, " - meta %4d in %4d\n",
	251	si->ndirty_meta, si->meta_pages);
	252	seq_printf(s, " - NATs %5d > %lu\n",
	253	si->nats, NM_WOUT_THRESHOLD);
	254	seq_printf(s, " - SITs: %5d\n - free_nids: %5d\n",
	255	si->sits, si->fnids);
2d219c51 GZ	256	seq_puts(s, "\nDistribution of User Blocks:");
	257	seq_puts(s, " [ valid \| invalid \| free ]\n");
	258	seq_puts(s, " [");
902829aa GKH	259
902829aa GKH	260	for (j = 0; j < si->util_valid; j++)
2d219c51 GZ	261	seq_putc(s, '-');
2d219c51 GZ	262	seq_putc(s, '\|');
902829aa GKH	263
902829aa GKH	264	for (j = 0; j < si->util_invalid; j++)
2d219c51 GZ	265	seq_putc(s, '-');
2d219c51 GZ	266	seq_putc(s, '\|');
902829aa GKH	267
902829aa GKH	268	for (j = 0; j < si->util_free; j++)
2d219c51 GZ	269	seq_putc(s, '-');
2d219c51 GZ	270	seq_puts(s, "]\n\n");
902829aa GKH	271	seq_printf(s, "SSR: %u blocks in %u segments\n",
	272	si->block_count[SSR], si->segment_count[SSR]);
	273	seq_printf(s, "LFS: %u blocks in %u segments\n",
	274	si->block_count[LFS], si->segment_count[LFS]);
	275
	276	/* segment usage info */
	277	update_sit_info(si->sbi);
	278	seq_printf(s, "\nBDF: %u, avg. vblocks: %u\n",
	279	si->bimodal, si->avg_vblocks);
	280
	281	/* memory footprint */
	282	update_mem_info(si->sbi);
	283	seq_printf(s, "\nMemory: %u KB = static: %u + cached: %u\n",
	284	(si->base_mem + si->cache_mem) >> 10,
	285	si->base_mem >> 10, si->cache_mem >> 10);
902829aa	286	}
66af62ce	287	mutex_unlock(&f2fs_stat_mutex);
902829aa GKH	288	return 0;
	289	}
	290
	291	static int stat_open(struct inode inode, struct file file)
	292	{
	293	return single_open(file, stat_show, inode->i_private);
	294	}
	295
	296	static const struct file_operations stat_fops = {
	297	.open = stat_open,
	298	.read = seq_read,
	299	.llseek = seq_lseek,
	300	.release = single_release,
	301	};
	302
4589d25d	303	int f2fs_build_stats(struct f2fs_sb_info *sbi)
902829aa GKH	304	{
	305	struct f2fs_super_block *raw_super = F2FS_RAW_SUPER(sbi);
	306	struct f2fs_stat_info *si;
	307
963d4f7d GZ	308	si = kzalloc(sizeof(struct f2fs_stat_info), GFP_KERNEL);
963d4f7d GZ	309	if (!si)
902829aa GKH	310	return -ENOMEM;
902829aa GKH	311
902829aa GKH	312	si->all_area_segs = le32_to_cpu(raw_super->segment_count);
	313	si->sit_area_segs = le32_to_cpu(raw_super->segment_count_sit);
	314	si->nat_area_segs = le32_to_cpu(raw_super->segment_count_nat);
	315	si->ssa_area_segs = le32_to_cpu(raw_super->segment_count_ssa);
	316	si->main_area_segs = le32_to_cpu(raw_super->segment_count_main);
	317	si->main_area_sections = le32_to_cpu(raw_super->section_count);
	318	si->main_area_zones = si->main_area_sections /
	319	le32_to_cpu(raw_super->secs_per_zone);
	320	si->sbi = sbi;
963d4f7d	321	sbi->stat_info = si;
66af62ce	322
	323	mutex_lock(&f2fs_stat_mutex);
	324	list_add_tail(&si->stat_list, &f2fs_stat_list);
	325	mutex_unlock(&f2fs_stat_mutex);
	326
902829aa GKH	327	return 0;
	328	}
	329
902829aa GKH	330	void f2fs_destroy_stats(struct f2fs_sb_info *sbi)
902829aa GKH	331	{
963d4f7d	332	struct f2fs_stat_info *si = F2FS_STAT(sbi);
902829aa	333
66af62ce	334	mutex_lock(&f2fs_stat_mutex);
902829aa	335	list_del(&si->stat_list);
66af62ce	336	mutex_unlock(&f2fs_stat_mutex);
66af62ce	337
963d4f7d	338	kfree(si);
902829aa GKH	339	}
902829aa GKH	340
4589d25d NJ	341	void __init f2fs_create_root_stats(void)
	342	{
	343	debugfs_root = debugfs_create_dir("f2fs", NULL);
	344	if (debugfs_root)
	345	debugfs_create_file("status", S_IRUGO, debugfs_root,
	346	NULL, &stat_fops);
	347	}
	348
	349	void f2fs_destroy_root_stats(void)
902829aa GKH	350	{
	351	debugfs_remove_recursive(debugfs_root);
	352	debugfs_root = NULL;
	353	}