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