fs/f2fs/debug.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 /*
   3  * f2fs debugging statistics
   4  *
   5  * Copyright (c) 2012 Samsung Electronics Co., Ltd.
   6  *             http://www.samsung.com/
   7  * Copyright (c) 2012 Linux Foundation
   8  * Copyright (c) 2012 Greg Kroah-Hartman <gregkh@linuxfoundation.org>
   9  */
  10
  11 #include <linux/fs.h>
  12 #include <linux/backing-dev.h>
  13 #include <linux/f2fs_fs.h>
  14 #include <linux/blkdev.h>
  15 #include <linux/debugfs.h>
  16 #include <linux/seq_file.h>
  17
  18 #include "f2fs.h"
  19 #include "node.h"
  20 #include "segment.h"
  21 #include "gc.h"
  22
  23 static LIST_HEAD(f2fs_stat_list);
  24 static DEFINE_MUTEX(f2fs_stat_mutex);
  25 #ifdef CONFIG_DEBUG_FS
  26 static struct dentry *f2fs_debugfs_root;
  27 #endif
  28
  29 /*
  30  * This function calculates BDF of every segments
  31  */
  32 void f2fs_update_sit_info(struct f2fs_sb_info *sbi)
  33 {
  34         struct f2fs_stat_info *si = F2FS_STAT(sbi);
  35         unsigned long long blks_per_sec, hblks_per_sec, total_vblocks;
  36         unsigned long long bimodal, dist;
  37         unsigned int segno, vblocks;
  38         int ndirty = 0;
  39
  40         bimodal = 0;
  41         total_vblocks = 0;
  42         blks_per_sec = BLKS_PER_SEC(sbi);
  43         hblks_per_sec = blks_per_sec / 2;
  44         for (segno = 0; segno < MAIN_SEGS(sbi); segno += sbi->segs_per_sec) {
  45                 vblocks = get_valid_blocks(sbi, segno, true);
  46                 dist = abs(vblocks - hblks_per_sec);
  47                 bimodal += dist * dist;
  48
  49                 if (vblocks > 0 && vblocks < blks_per_sec) {
  50                         total_vblocks += vblocks;
  51                         ndirty++;
  52                 }
  53         }
  54         dist = div_u64(MAIN_SECS(sbi) * hblks_per_sec * hblks_per_sec, 100);
  55         si->bimodal = div64_u64(bimodal, dist);
  56         if (si->dirty_count)
  57                 si->avg_vblocks = div_u64(total_vblocks, ndirty);
  58         else
  59                 si->avg_vblocks = 0;
  60 }
  61
  62 #ifdef CONFIG_DEBUG_FS
  63 static void update_general_status(struct f2fs_sb_info *sbi)
  64 {
  65         struct f2fs_stat_info *si = F2FS_STAT(sbi);
  66         struct f2fs_super_block *raw_super = F2FS_RAW_SUPER(sbi);
  67         int i;
  68
  69         /* these will be changed if online resize is done */
  70         si->main_area_segs = le32_to_cpu(raw_super->segment_count_main);
  71         si->main_area_sections = le32_to_cpu(raw_super->section_count);
  72         si->main_area_zones = si->main_area_sections /
  73                                 le32_to_cpu(raw_super->secs_per_zone);
  74
  75         /* validation check of the segment numbers */
  76         si->hit_largest = atomic64_read(&sbi->read_hit_largest);
  77         si->hit_cached = atomic64_read(&sbi->read_hit_cached);
  78         si->hit_rbtree = atomic64_read(&sbi->read_hit_rbtree);
  79         si->hit_total = si->hit_largest + si->hit_cached + si->hit_rbtree;
  80         si->total_ext = atomic64_read(&sbi->total_hit_ext);
  81         si->ext_tree = atomic_read(&sbi->total_ext_tree);
  82         si->zombie_tree = atomic_read(&sbi->total_zombie_tree);
  83         si->ext_node = atomic_read(&sbi->total_ext_node);
  84         si->ndirty_node = get_pages(sbi, F2FS_DIRTY_NODES);
  85         si->ndirty_dent = get_pages(sbi, F2FS_DIRTY_DENTS);
  86         si->ndirty_meta = get_pages(sbi, F2FS_DIRTY_META);
  87         si->ndirty_data = get_pages(sbi, F2FS_DIRTY_DATA);
  88         si->ndirty_qdata = get_pages(sbi, F2FS_DIRTY_QDATA);
  89         si->ndirty_imeta = get_pages(sbi, F2FS_DIRTY_IMETA);
  90         si->ndirty_dirs = sbi->ndirty_inode[DIR_INODE];
  91         si->ndirty_files = sbi->ndirty_inode[FILE_INODE];
  92         si->nquota_files = sbi->nquota_files;
  93         si->ndirty_all = sbi->ndirty_inode[DIRTY_META];
  94         si->inmem_pages = get_pages(sbi, F2FS_INMEM_PAGES);
  95         si->aw_cnt = sbi->atomic_files;
  96         si->vw_cnt = atomic_read(&sbi->vw_cnt);
  97         si->max_aw_cnt = atomic_read(&sbi->max_aw_cnt);
  98         si->max_vw_cnt = atomic_read(&sbi->max_vw_cnt);
  99         si->nr_dio_read = get_pages(sbi, F2FS_DIO_READ);
 100         si->nr_dio_write = get_pages(sbi, F2FS_DIO_WRITE);
 101         si->nr_wb_cp_data = get_pages(sbi, F2FS_WB_CP_DATA);
 102         si->nr_wb_data = get_pages(sbi, F2FS_WB_DATA);
 103         si->nr_rd_data = get_pages(sbi, F2FS_RD_DATA);
 104         si->nr_rd_node = get_pages(sbi, F2FS_RD_NODE);
 105         si->nr_rd_meta = get_pages(sbi, F2FS_RD_META);
 106         if (SM_I(sbi)->fcc_info) {
 107                 si->nr_flushed =
 108                         atomic_read(&SM_I(sbi)->fcc_info->issued_flush);
 109                 si->nr_flushing =
 110                         atomic_read(&SM_I(sbi)->fcc_info->queued_flush);
 111                 si->flush_list_empty =
 112                         llist_empty(&SM_I(sbi)->fcc_info->issue_list);
 113         }
 114         if (SM_I(sbi)->dcc_info) {
 115                 si->nr_discarded =
 116                         atomic_read(&SM_I(sbi)->dcc_info->issued_discard);
 117                 si->nr_discarding =
 118                         atomic_read(&SM_I(sbi)->dcc_info->queued_discard);
 119                 si->nr_discard_cmd =
 120                         atomic_read(&SM_I(sbi)->dcc_info->discard_cmd_cnt);
 121                 si->undiscard_blks = SM_I(sbi)->dcc_info->undiscard_blks;
 122         }
 123         si->nr_issued_ckpt = atomic_read(&sbi->cprc_info.issued_ckpt);
 124         si->nr_total_ckpt = atomic_read(&sbi->cprc_info.total_ckpt);
 125         si->nr_queued_ckpt = atomic_read(&sbi->cprc_info.queued_ckpt);
 126         spin_lock(&sbi->cprc_info.stat_lock);
 127         si->cur_ckpt_time = sbi->cprc_info.cur_time;
 128         si->peak_ckpt_time = sbi->cprc_info.peak_time;
 129         spin_unlock(&sbi->cprc_info.stat_lock);
 130         si->total_count = (int)sbi->user_block_count / sbi->blocks_per_seg;
 131         si->rsvd_segs = reserved_segments(sbi);
 132         si->overp_segs = overprovision_segments(sbi);
 133         si->valid_count = valid_user_blocks(sbi);
 134         si->discard_blks = discard_blocks(sbi);
 135         si->valid_node_count = valid_node_count(sbi);
 136         si->valid_inode_count = valid_inode_count(sbi);
 137         si->inline_xattr = atomic_read(&sbi->inline_xattr);
 138         si->inline_inode = atomic_read(&sbi->inline_inode);
 139         si->inline_dir = atomic_read(&sbi->inline_dir);
 140         si->compr_inode = atomic_read(&sbi->compr_inode);
 141         si->compr_blocks = atomic64_read(&sbi->compr_blocks);
 142         si->append = sbi->im[APPEND_INO].ino_num;
 143         si->update = sbi->im[UPDATE_INO].ino_num;
 144         si->orphans = sbi->im[ORPHAN_INO].ino_num;
 145         si->utilization = utilization(sbi);
 146
 147         si->free_segs = free_segments(sbi);
 148         si->free_secs = free_sections(sbi);
 149         si->prefree_count = prefree_segments(sbi);
 150         si->dirty_count = dirty_segments(sbi);
 151         if (sbi->node_inode)
 152                 si->node_pages = NODE_MAPPING(sbi)->nrpages;
 153         if (sbi->meta_inode)
 154                 si->meta_pages = META_MAPPING(sbi)->nrpages;
 155 #ifdef CONFIG_F2FS_FS_COMPRESSION
 156         if (sbi->compress_inode) {
 157                 si->compress_pages = COMPRESS_MAPPING(sbi)->nrpages;
 158                 si->compress_page_hit = atomic_read(&sbi->compress_page_hit);
 159         }
 160 #endif
 161         si->nats = NM_I(sbi)->nat_cnt[TOTAL_NAT];
 162         si->dirty_nats = NM_I(sbi)->nat_cnt[DIRTY_NAT];
 163         si->sits = MAIN_SEGS(sbi);
 164         si->dirty_sits = SIT_I(sbi)->dirty_sentries;
 165         si->free_nids = NM_I(sbi)->nid_cnt[FREE_NID];
 166         si->avail_nids = NM_I(sbi)->available_nids;
 167         si->alloc_nids = NM_I(sbi)->nid_cnt[PREALLOC_NID];
 168         si->io_skip_bggc = sbi->io_skip_bggc;
 169         si->other_skip_bggc = sbi->other_skip_bggc;
 170         si->skipped_atomic_files[BG_GC] = sbi->skipped_atomic_files[BG_GC];
 171         si->skipped_atomic_files[FG_GC] = sbi->skipped_atomic_files[FG_GC];
 172         si->util_free = (int)(free_user_blocks(sbi) >> sbi->log_blocks_per_seg)
 173                 * 100 / (int)(sbi->user_block_count >> sbi->log_blocks_per_seg)
 174                 / 2;
 175         si->util_valid = (int)(written_block_count(sbi) >>
 176                                                 sbi->log_blocks_per_seg)
 177                 * 100 / (int)(sbi->user_block_count >> sbi->log_blocks_per_seg)
 178                 / 2;
 179         si->util_invalid = 50 - si->util_free - si->util_valid;
 180         for (i = CURSEG_HOT_DATA; i < NO_CHECK_TYPE; i++) {
 181                 struct curseg_info *curseg = CURSEG_I(sbi, i);
 182
 183                 si->curseg[i] = curseg->segno;
 184                 si->cursec[i] = GET_SEC_FROM_SEG(sbi, curseg->segno);
 185                 si->curzone[i] = GET_ZONE_FROM_SEC(sbi, si->cursec[i]);
 186         }
 187
 188         for (i = META_CP; i < META_MAX; i++)
 189                 si->meta_count[i] = atomic_read(&sbi->meta_count[i]);
 190
 191         for (i = 0; i < NO_CHECK_TYPE; i++) {
 192                 si->dirty_seg[i] = 0;
 193                 si->full_seg[i] = 0;
 194                 si->valid_blks[i] = 0;
 195         }
 196
 197         for (i = 0; i < MAIN_SEGS(sbi); i++) {
 198                 int blks = get_seg_entry(sbi, i)->valid_blocks;
 199                 int type = get_seg_entry(sbi, i)->type;
 200
 201                 if (!blks)
 202                         continue;
 203
 204                 if (blks == sbi->blocks_per_seg)
 205                         si->full_seg[type]++;
 206                 else
 207                         si->dirty_seg[type]++;
 208                 si->valid_blks[type] += blks;
 209         }
 210
 211         for (i = 0; i < 2; i++) {
 212                 si->segment_count[i] = sbi->segment_count[i];
 213                 si->block_count[i] = sbi->block_count[i];
 214         }
 215
 216         si->inplace_count = atomic_read(&sbi->inplace_count);
 217 }
 218
 219 /*
 220  * This function calculates memory footprint.
 221  */
 222 static void update_mem_info(struct f2fs_sb_info *sbi)
 223 {
 224         struct f2fs_stat_info *si = F2FS_STAT(sbi);
 225         int i;
 226
 227         if (si->base_mem)
 228                 goto get_cache;
 229
 230         /* build stat */
 231         si->base_mem = sizeof(struct f2fs_stat_info);
 232
 233         /* build superblock */
 234         si->base_mem += sizeof(struct f2fs_sb_info) + sbi->sb->s_blocksize;
 235         si->base_mem += 2 * sizeof(struct f2fs_inode_info);
 236         si->base_mem += sizeof(*sbi->ckpt);
 237
 238         /* build sm */
 239         si->base_mem += sizeof(struct f2fs_sm_info);
 240
 241         /* build sit */
 242         si->base_mem += sizeof(struct sit_info);
 243         si->base_mem += MAIN_SEGS(sbi) * sizeof(struct seg_entry);
 244         si->base_mem += f2fs_bitmap_size(MAIN_SEGS(sbi));
 245         si->base_mem += 2 * SIT_VBLOCK_MAP_SIZE * MAIN_SEGS(sbi);
 246         si->base_mem += SIT_VBLOCK_MAP_SIZE * MAIN_SEGS(sbi);
 247         si->base_mem += SIT_VBLOCK_MAP_SIZE;
 248         if (__is_large_section(sbi))
 249                 si->base_mem += MAIN_SECS(sbi) * sizeof(struct sec_entry);
 250         si->base_mem += __bitmap_size(sbi, SIT_BITMAP);
 251
 252         /* build free segmap */
 253         si->base_mem += sizeof(struct free_segmap_info);
 254         si->base_mem += f2fs_bitmap_size(MAIN_SEGS(sbi));
 255         si->base_mem += f2fs_bitmap_size(MAIN_SECS(sbi));
 256
 257         /* build curseg */
 258         si->base_mem += sizeof(struct curseg_info) * NR_CURSEG_TYPE;
 259         si->base_mem += PAGE_SIZE * NR_CURSEG_TYPE;
 260
 261         /* build dirty segmap */
 262         si->base_mem += sizeof(struct dirty_seglist_info);
 263         si->base_mem += NR_DIRTY_TYPE * f2fs_bitmap_size(MAIN_SEGS(sbi));
 264         si->base_mem += f2fs_bitmap_size(MAIN_SECS(sbi));
 265
 266         /* build nm */
 267         si->base_mem += sizeof(struct f2fs_nm_info);
 268         si->base_mem += __bitmap_size(sbi, NAT_BITMAP);
 269         si->base_mem += (NM_I(sbi)->nat_bits_blocks << F2FS_BLKSIZE_BITS);
 270         si->base_mem += NM_I(sbi)->nat_blocks *
 271                                 f2fs_bitmap_size(NAT_ENTRY_PER_BLOCK);
 272         si->base_mem += NM_I(sbi)->nat_blocks / 8;
 273         si->base_mem += NM_I(sbi)->nat_blocks * sizeof(unsigned short);
 274
 275 get_cache:
 276         si->cache_mem = 0;
 277
 278         /* build gc */
 279         if (sbi->gc_thread)
 280                 si->cache_mem += sizeof(struct f2fs_gc_kthread);
 281
 282         /* build merge flush thread */
 283         if (SM_I(sbi)->fcc_info)
 284                 si->cache_mem += sizeof(struct flush_cmd_control);
 285         if (SM_I(sbi)->dcc_info) {
 286                 si->cache_mem += sizeof(struct discard_cmd_control);
 287                 si->cache_mem += sizeof(struct discard_cmd) *
 288                         atomic_read(&SM_I(sbi)->dcc_info->discard_cmd_cnt);
 289         }
 290
 291         /* free nids */
 292         si->cache_mem += (NM_I(sbi)->nid_cnt[FREE_NID] +
 293                                 NM_I(sbi)->nid_cnt[PREALLOC_NID]) *
 294                                 sizeof(struct free_nid);
 295         si->cache_mem += NM_I(sbi)->nat_cnt[TOTAL_NAT] *
 296                                 sizeof(struct nat_entry);
 297         si->cache_mem += NM_I(sbi)->nat_cnt[DIRTY_NAT] *
 298                                 sizeof(struct nat_entry_set);
 299         si->cache_mem += si->inmem_pages * sizeof(struct inmem_pages);
 300         for (i = 0; i < MAX_INO_ENTRY; i++)
 301                 si->cache_mem += sbi->im[i].ino_num * sizeof(struct ino_entry);
 302         si->cache_mem += atomic_read(&sbi->total_ext_tree) *
 303                                                 sizeof(struct extent_tree);
 304         si->cache_mem += atomic_read(&sbi->total_ext_node) *
 305                                                 sizeof(struct extent_node);
 306
 307         si->page_mem = 0;
 308         if (sbi->node_inode) {
 309                 unsigned npages = NODE_MAPPING(sbi)->nrpages;
 310
 311                 si->page_mem += (unsigned long long)npages << PAGE_SHIFT;
 312         }
 313         if (sbi->meta_inode) {
 314                 unsigned npages = META_MAPPING(sbi)->nrpages;
 315
 316                 si->page_mem += (unsigned long long)npages << PAGE_SHIFT;
 317         }
 318 #ifdef CONFIG_F2FS_FS_COMPRESSION
 319         if (sbi->compress_inode) {
 320                 unsigned npages = COMPRESS_MAPPING(sbi)->nrpages;
 321                 si->page_mem += (unsigned long long)npages << PAGE_SHIFT;
 322         }
 323 #endif
 324 }
 325
 326 static int stat_show(struct seq_file *s, void *v)
 327 {
 328         struct f2fs_stat_info *si;
 329         int i = 0;
 330         int j;
 331
 332         mutex_lock(&f2fs_stat_mutex);
 333         list_for_each_entry(si, &f2fs_stat_list, stat_list) {
 334                 update_general_status(si->sbi);
 335
 336                 seq_printf(s, "\n=====[ partition info(%pg). #%d, %s, CP: %s]=====\n",
 337                         si->sbi->sb->s_bdev, i++,
 338                         f2fs_readonly(si->sbi->sb) ? "RO": "RW",
 339                         is_set_ckpt_flags(si->sbi, CP_DISABLED_FLAG) ?
 340                         "Disabled": (f2fs_cp_error(si->sbi) ? "Error": "Good"));
 341                 seq_printf(s, "[SB: 1] [CP: 2] [SIT: %d] [NAT: %d] ",
 342                            si->sit_area_segs, si->nat_area_segs);
 343                 seq_printf(s, "[SSA: %d] [MAIN: %d",
 344                            si->ssa_area_segs, si->main_area_segs);
 345                 seq_printf(s, "(OverProv:%d Resv:%d)]\n\n",
 346                            si->overp_segs, si->rsvd_segs);
 347                 seq_printf(s, "Current Time Sec: %llu / Mounted Time Sec: %llu\n\n",
 348                                         ktime_get_boottime_seconds(),
 349                                         SIT_I(si->sbi)->mounted_time);
 350                 if (test_opt(si->sbi, DISCARD))
 351                         seq_printf(s, "Utilization: %u%% (%u valid blocks, %u discard blocks)\n",
 352                                 si->utilization, si->valid_count, si->discard_blks);
 353                 else
 354                         seq_printf(s, "Utilization: %u%% (%u valid blocks)\n",
 355                                 si->utilization, si->valid_count);
 356
 357                 seq_printf(s, "  - Node: %u (Inode: %u, ",
 358                            si->valid_node_count, si->valid_inode_count);
 359                 seq_printf(s, "Other: %u)\n  - Data: %u\n",
 360                            si->valid_node_count - si->valid_inode_count,
 361                            si->valid_count - si->valid_node_count);
 362                 seq_printf(s, "  - Inline_xattr Inode: %u\n",
 363                            si->inline_xattr);
 364                 seq_printf(s, "  - Inline_data Inode: %u\n",
 365                            si->inline_inode);
 366                 seq_printf(s, "  - Inline_dentry Inode: %u\n",
 367                            si->inline_dir);
 368                 seq_printf(s, "  - Compressed Inode: %u, Blocks: %llu\n",
 369                            si->compr_inode, si->compr_blocks);
 370                 seq_printf(s, "  - Orphan/Append/Update Inode: %u, %u, %u\n",
 371                            si->orphans, si->append, si->update);
 372                 seq_printf(s, "\nMain area: %d segs, %d secs %d zones\n",
 373                            si->main_area_segs, si->main_area_sections,
 374                            si->main_area_zones);
 375                 seq_printf(s, "    TYPE         %8s %8s %8s %10s %10s %10s\n",
 376                            "segno", "secno", "zoneno", "dirty_seg", "full_seg", "valid_blk");
 377                 seq_printf(s, "  - COLD   data: %8d %8d %8d %10u %10u %10u\n",
 378                            si->curseg[CURSEG_COLD_DATA],
 379                            si->cursec[CURSEG_COLD_DATA],
 380                            si->curzone[CURSEG_COLD_DATA],
 381                            si->dirty_seg[CURSEG_COLD_DATA],
 382                            si->full_seg[CURSEG_COLD_DATA],
 383                            si->valid_blks[CURSEG_COLD_DATA]);
 384                 seq_printf(s, "  - WARM   data: %8d %8d %8d %10u %10u %10u\n",
 385                            si->curseg[CURSEG_WARM_DATA],
 386                            si->cursec[CURSEG_WARM_DATA],
 387                            si->curzone[CURSEG_WARM_DATA],
 388                            si->dirty_seg[CURSEG_WARM_DATA],
 389                            si->full_seg[CURSEG_WARM_DATA],
 390                            si->valid_blks[CURSEG_WARM_DATA]);
 391                 seq_printf(s, "  - HOT    data: %8d %8d %8d %10u %10u %10u\n",
 392                            si->curseg[CURSEG_HOT_DATA],
 393                            si->cursec[CURSEG_HOT_DATA],
 394                            si->curzone[CURSEG_HOT_DATA],
 395                            si->dirty_seg[CURSEG_HOT_DATA],
 396                            si->full_seg[CURSEG_HOT_DATA],
 397                            si->valid_blks[CURSEG_HOT_DATA]);
 398                 seq_printf(s, "  - Dir   dnode: %8d %8d %8d %10u %10u %10u\n",
 399                            si->curseg[CURSEG_HOT_NODE],
 400                            si->cursec[CURSEG_HOT_NODE],
 401                            si->curzone[CURSEG_HOT_NODE],
 402                            si->dirty_seg[CURSEG_HOT_NODE],
 403                            si->full_seg[CURSEG_HOT_NODE],
 404                            si->valid_blks[CURSEG_HOT_NODE]);
 405                 seq_printf(s, "  - File  dnode: %8d %8d %8d %10u %10u %10u\n",
 406                            si->curseg[CURSEG_WARM_NODE],
 407                            si->cursec[CURSEG_WARM_NODE],
 408                            si->curzone[CURSEG_WARM_NODE],
 409                            si->dirty_seg[CURSEG_WARM_NODE],
 410                            si->full_seg[CURSEG_WARM_NODE],
 411                            si->valid_blks[CURSEG_WARM_NODE]);
 412                 seq_printf(s, "  - Indir nodes: %8d %8d %8d %10u %10u %10u\n",
 413                            si->curseg[CURSEG_COLD_NODE],
 414                            si->cursec[CURSEG_COLD_NODE],
 415                            si->curzone[CURSEG_COLD_NODE],
 416                            si->dirty_seg[CURSEG_COLD_NODE],
 417                            si->full_seg[CURSEG_COLD_NODE],
 418                            si->valid_blks[CURSEG_COLD_NODE]);
 419                 seq_printf(s, "  - Pinned file: %8d %8d %8d\n",
 420                            si->curseg[CURSEG_COLD_DATA_PINNED],
 421                            si->cursec[CURSEG_COLD_DATA_PINNED],
 422                            si->curzone[CURSEG_COLD_DATA_PINNED]);
 423                 seq_printf(s, "  - ATGC   data: %8d %8d %8d\n",
 424                            si->curseg[CURSEG_ALL_DATA_ATGC],
 425                            si->cursec[CURSEG_ALL_DATA_ATGC],
 426                            si->curzone[CURSEG_ALL_DATA_ATGC]);
 427                 seq_printf(s, "\n  - Valid: %d\n  - Dirty: %d\n",
 428                            si->main_area_segs - si->dirty_count -
 429                            si->prefree_count - si->free_segs,
 430                            si->dirty_count);
 431                 seq_printf(s, "  - Prefree: %d\n  - Free: %d (%d)\n\n",
 432                            si->prefree_count, si->free_segs, si->free_secs);
 433                 seq_printf(s, "CP calls: %d (BG: %d)\n",
 434                                 si->cp_count, si->bg_cp_count);
 435                 seq_printf(s, "  - cp blocks : %u\n", si->meta_count[META_CP]);
 436                 seq_printf(s, "  - sit blocks : %u\n",
 437                                 si->meta_count[META_SIT]);
 438                 seq_printf(s, "  - nat blocks : %u\n",
 439                                 si->meta_count[META_NAT]);
 440                 seq_printf(s, "  - ssa blocks : %u\n",
 441                                 si->meta_count[META_SSA]);
 442                 seq_printf(s, "CP merge (Queued: %4d, Issued: %4d, Total: %4d, "
 443                                 "Cur time: %4d(ms), Peak time: %4d(ms))\n",
 444                                 si->nr_queued_ckpt, si->nr_issued_ckpt,
 445                                 si->nr_total_ckpt, si->cur_ckpt_time,
 446                                 si->peak_ckpt_time);
 447                 seq_printf(s, "GC calls: %d (BG: %d)\n",
 448                            si->call_count, si->bg_gc);
 449                 seq_printf(s, "  - data segments : %d (%d)\n",
 450                                 si->data_segs, si->bg_data_segs);
 451                 seq_printf(s, "  - node segments : %d (%d)\n",
 452                                 si->node_segs, si->bg_node_segs);
 453                 seq_printf(s, "Try to move %d blocks (BG: %d)\n", si->tot_blks,
 454                                 si->bg_data_blks + si->bg_node_blks);
 455                 seq_printf(s, "  - data blocks : %d (%d)\n", si->data_blks,
 456                                 si->bg_data_blks);
 457                 seq_printf(s, "  - node blocks : %d (%d)\n", si->node_blks,
 458                                 si->bg_node_blks);
 459                 seq_printf(s, "Skipped : atomic write %llu (%llu)\n",
 460                                 si->skipped_atomic_files[BG_GC] +
 461                                 si->skipped_atomic_files[FG_GC],
 462                                 si->skipped_atomic_files[BG_GC]);
 463                 seq_printf(s, "BG skip : IO: %u, Other: %u\n",
 464                                 si->io_skip_bggc, si->other_skip_bggc);
 465                 seq_puts(s, "\nExtent Cache:\n");
 466                 seq_printf(s, "  - Hit Count: L1-1:%llu L1-2:%llu L2:%llu\n",
 467                                 si->hit_largest, si->hit_cached,
 468                                 si->hit_rbtree);
 469                 seq_printf(s, "  - Hit Ratio: %llu%% (%llu / %llu)\n",
 470                                 !si->total_ext ? 0 :
 471                                 div64_u64(si->hit_total * 100, si->total_ext),
 472                                 si->hit_total, si->total_ext);
 473                 seq_printf(s, "  - Inner Struct Count: tree: %d(%d), node: %d\n",
 474                                 si->ext_tree, si->zombie_tree, si->ext_node);
 475                 seq_puts(s, "\nBalancing F2FS Async:\n");
 476                 seq_printf(s, "  - DIO (R: %4d, W: %4d)\n",
 477                            si->nr_dio_read, si->nr_dio_write);
 478                 seq_printf(s, "  - IO_R (Data: %4d, Node: %4d, Meta: %4d\n",
 479                            si->nr_rd_data, si->nr_rd_node, si->nr_rd_meta);
 480                 seq_printf(s, "  - IO_W (CP: %4d, Data: %4d, Flush: (%4d %4d %4d), "
 481                         "Discard: (%4d %4d)) cmd: %4d undiscard:%4u\n",
 482                            si->nr_wb_cp_data, si->nr_wb_data,
 483                            si->nr_flushing, si->nr_flushed,
 484                            si->flush_list_empty,
 485                            si->nr_discarding, si->nr_discarded,
 486                            si->nr_discard_cmd, si->undiscard_blks);
 487                 seq_printf(s, "  - inmem: %4d, atomic IO: %4d (Max. %4d), "
 488                         "volatile IO: %4d (Max. %4d)\n",
 489                            si->inmem_pages, si->aw_cnt, si->max_aw_cnt,
 490                            si->vw_cnt, si->max_vw_cnt);
 491                 seq_printf(s, "  - compress: %4d, hit:%8d\n", si->compress_pages, si->compress_page_hit);
 492                 seq_printf(s, "  - nodes: %4d in %4d\n",
 493                            si->ndirty_node, si->node_pages);
 494                 seq_printf(s, "  - dents: %4d in dirs:%4d (%4d)\n",
 495                            si->ndirty_dent, si->ndirty_dirs, si->ndirty_all);
 496                 seq_printf(s, "  - datas: %4d in files:%4d\n",
 497                            si->ndirty_data, si->ndirty_files);
 498                 seq_printf(s, "  - quota datas: %4d in quota files:%4d\n",
 499                            si->ndirty_qdata, si->nquota_files);
 500                 seq_printf(s, "  - meta: %4d in %4d\n",
 501                            si->ndirty_meta, si->meta_pages);
 502                 seq_printf(s, "  - imeta: %4d\n",
 503                            si->ndirty_imeta);
 504                 seq_printf(s, "  - NATs: %9d/%9d\n  - SITs: %9d/%9d\n",
 505                            si->dirty_nats, si->nats, si->dirty_sits, si->sits);
 506                 seq_printf(s, "  - free_nids: %9d/%9d\n  - alloc_nids: %9d\n",
 507                            si->free_nids, si->avail_nids, si->alloc_nids);
 508                 seq_puts(s, "\nDistribution of User Blocks:");
 509                 seq_puts(s, " [ valid | invalid | free ]\n");
 510                 seq_puts(s, "  [");
 511
 512                 for (j = 0; j < si->util_valid; j++)
 513                         seq_putc(s, '-');
 514                 seq_putc(s, '|');
 515
 516                 for (j = 0; j < si->util_invalid; j++)
 517                         seq_putc(s, '-');
 518                 seq_putc(s, '|');
 519
 520                 for (j = 0; j < si->util_free; j++)
 521                         seq_putc(s, '-');
 522                 seq_puts(s, "]\n\n");
 523                 seq_printf(s, "IPU: %u blocks\n", si->inplace_count);
 524                 seq_printf(s, "SSR: %u blocks in %u segments\n",
 525                            si->block_count[SSR], si->segment_count[SSR]);
 526                 seq_printf(s, "LFS: %u blocks in %u segments\n",
 527                            si->block_count[LFS], si->segment_count[LFS]);
 528
 529                 /* segment usage info */
 530                 f2fs_update_sit_info(si->sbi);
 531                 seq_printf(s, "\nBDF: %u, avg. vblocks: %u\n",
 532                            si->bimodal, si->avg_vblocks);
 533
 534                 /* memory footprint */
 535                 update_mem_info(si->sbi);
 536                 seq_printf(s, "\nMemory: %llu KB\n",
 537                         (si->base_mem + si->cache_mem + si->page_mem) >> 10);
 538                 seq_printf(s, "  - static: %llu KB\n",
 539                                 si->base_mem >> 10);
 540                 seq_printf(s, "  - cached: %llu KB\n",
 541                                 si->cache_mem >> 10);
 542                 seq_printf(s, "  - paged : %llu KB\n",
 543                                 si->page_mem >> 10);
 544         }
 545         mutex_unlock(&f2fs_stat_mutex);
 546         return 0;
 547 }
 548
 549 DEFINE_SHOW_ATTRIBUTE(stat);
 550 #endif
 551
 552 int f2fs_build_stats(struct f2fs_sb_info *sbi)
 553 {
 554         struct f2fs_super_block *raw_super = F2FS_RAW_SUPER(sbi);
 555         struct f2fs_stat_info *si;
 556         int i;
 557
 558         si = f2fs_kzalloc(sbi, sizeof(struct f2fs_stat_info), GFP_KERNEL);
 559         if (!si)
 560                 return -ENOMEM;
 561
 562         si->all_area_segs = le32_to_cpu(raw_super->segment_count);
 563         si->sit_area_segs = le32_to_cpu(raw_super->segment_count_sit);
 564         si->nat_area_segs = le32_to_cpu(raw_super->segment_count_nat);
 565         si->ssa_area_segs = le32_to_cpu(raw_super->segment_count_ssa);
 566         si->main_area_segs = le32_to_cpu(raw_super->segment_count_main);
 567         si->main_area_sections = le32_to_cpu(raw_super->section_count);
 568         si->main_area_zones = si->main_area_sections /
 569                                 le32_to_cpu(raw_super->secs_per_zone);
 570         si->sbi = sbi;
 571         sbi->stat_info = si;
 572
 573         atomic64_set(&sbi->total_hit_ext, 0);
 574         atomic64_set(&sbi->read_hit_rbtree, 0);
 575         atomic64_set(&sbi->read_hit_largest, 0);
 576         atomic64_set(&sbi->read_hit_cached, 0);
 577
 578         atomic_set(&sbi->inline_xattr, 0);
 579         atomic_set(&sbi->inline_inode, 0);
 580         atomic_set(&sbi->inline_dir, 0);
 581         atomic_set(&sbi->compr_inode, 0);
 582         atomic64_set(&sbi->compr_blocks, 0);
 583         atomic_set(&sbi->inplace_count, 0);
 584         for (i = META_CP; i < META_MAX; i++)
 585                 atomic_set(&sbi->meta_count[i], 0);
 586
 587         atomic_set(&sbi->vw_cnt, 0);
 588         atomic_set(&sbi->max_aw_cnt, 0);
 589         atomic_set(&sbi->max_vw_cnt, 0);
 590
 591         mutex_lock(&f2fs_stat_mutex);
 592         list_add_tail(&si->stat_list, &f2fs_stat_list);
 593         mutex_unlock(&f2fs_stat_mutex);
 594
 595         return 0;
 596 }
 597
 598 void f2fs_destroy_stats(struct f2fs_sb_info *sbi)
 599 {
 600         struct f2fs_stat_info *si = F2FS_STAT(sbi);
 601
 602         mutex_lock(&f2fs_stat_mutex);
 603         list_del(&si->stat_list);
 604         mutex_unlock(&f2fs_stat_mutex);
 605
 606         kfree(si);
 607 }
 608
 609 void __init f2fs_create_root_stats(void)
 610 {
 611 #ifdef CONFIG_DEBUG_FS
 612         f2fs_debugfs_root = debugfs_create_dir("f2fs", NULL);
 613
 614         debugfs_create_file("status", S_IRUGO, f2fs_debugfs_root, NULL,
 615                             &stat_fops);
 616 #endif
 617 }
 618
 619 void f2fs_destroy_root_stats(void)
 620 {
 621 #ifdef CONFIG_DEBUG_FS
 622         debugfs_remove_recursive(f2fs_debugfs_root);
 623         f2fs_debugfs_root = NULL;
 624 #endif
 625 }