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