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 <[email protected]>
   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         si->nats = NM_I(sbi)->nat_cnt[TOTAL_NAT];
 156         si->dirty_nats = NM_I(sbi)->nat_cnt[DIRTY_NAT];
 157         si->sits = MAIN_SEGS(sbi);
 158         si->dirty_sits = SIT_I(sbi)->dirty_sentries;
 159         si->free_nids = NM_I(sbi)->nid_cnt[FREE_NID];
 160         si->avail_nids = NM_I(sbi)->available_nids;
 161         si->alloc_nids = NM_I(sbi)->nid_cnt[PREALLOC_NID];
 162         si->io_skip_bggc = sbi->io_skip_bggc;
 163         si->other_skip_bggc = sbi->other_skip_bggc;
 164         si->skipped_atomic_files[BG_GC] = sbi->skipped_atomic_files[BG_GC];
 165         si->skipped_atomic_files[FG_GC] = sbi->skipped_atomic_files[FG_GC];
 166         si->util_free = (int)(free_user_blocks(sbi) >> sbi->log_blocks_per_seg)
 167                 * 100 / (int)(sbi->user_block_count >> sbi->log_blocks_per_seg)
 168                 / 2;
 169         si->util_valid = (int)(written_block_count(sbi) >>
 170                                                 sbi->log_blocks_per_seg)
 171                 * 100 / (int)(sbi->user_block_count >> sbi->log_blocks_per_seg)
 172                 / 2;
 173         si->util_invalid = 50 - si->util_free - si->util_valid;
 174         for (i = CURSEG_HOT_DATA; i < NO_CHECK_TYPE; i++) {
 175                 struct curseg_info *curseg = CURSEG_I(sbi, i);
 176                 si->curseg[i] = curseg->segno;
 177                 si->cursec[i] = GET_SEC_FROM_SEG(sbi, curseg->segno);
 178                 si->curzone[i] = GET_ZONE_FROM_SEC(sbi, si->cursec[i]);
 179         }
 180
 181         for (i = META_CP; i < META_MAX; i++)
 182                 si->meta_count[i] = atomic_read(&sbi->meta_count[i]);
 183
 184         for (i = 0; i < NO_CHECK_TYPE; i++) {
 185                 si->dirty_seg[i] = 0;
 186                 si->full_seg[i] = 0;
 187                 si->valid_blks[i] = 0;
 188         }
 189
 190         for (i = 0; i < MAIN_SEGS(sbi); i++) {
 191                 int blks = get_seg_entry(sbi, i)->valid_blocks;
 192                 int type = get_seg_entry(sbi, i)->type;
 193
 194                 if (!blks)
 195                         continue;
 196
 197                 if (blks == sbi->blocks_per_seg)
 198                         si->full_seg[type]++;
 199                 else
 200                         si->dirty_seg[type]++;
 201                 si->valid_blks[type] += blks;
 202         }
 203
 204         for (i = 0; i < 2; i++) {
 205                 si->segment_count[i] = sbi->segment_count[i];
 206                 si->block_count[i] = sbi->block_count[i];
 207         }
 208
 209         si->inplace_count = atomic_read(&sbi->inplace_count);
 210 }
 211
 212 /*
 213  * This function calculates memory footprint.
 214  */
 215 static void update_mem_info(struct f2fs_sb_info *sbi)
 216 {
 217         struct f2fs_stat_info *si = F2FS_STAT(sbi);
 218         int i;
 219
 220         if (si->base_mem)
 221                 goto get_cache;
 222
 223         /* build stat */
 224         si->base_mem = sizeof(struct f2fs_stat_info);
 225
 226         /* build superblock */
 227         si->base_mem += sizeof(struct f2fs_sb_info) + sbi->sb->s_blocksize;
 228         si->base_mem += 2 * sizeof(struct f2fs_inode_info);
 229         si->base_mem += sizeof(*sbi->ckpt);
 230
 231         /* build sm */
 232         si->base_mem += sizeof(struct f2fs_sm_info);
 233
 234         /* build sit */
 235         si->base_mem += sizeof(struct sit_info);
 236         si->base_mem += MAIN_SEGS(sbi) * sizeof(struct seg_entry);
 237         si->base_mem += f2fs_bitmap_size(MAIN_SEGS(sbi));
 238         si->base_mem += 2 * SIT_VBLOCK_MAP_SIZE * MAIN_SEGS(sbi);
 239         si->base_mem += SIT_VBLOCK_MAP_SIZE * MAIN_SEGS(sbi);
 240         si->base_mem += SIT_VBLOCK_MAP_SIZE;
 241         if (__is_large_section(sbi))
 242                 si->base_mem += MAIN_SECS(sbi) * sizeof(struct sec_entry);
 243         si->base_mem += __bitmap_size(sbi, SIT_BITMAP);
 244
 245         /* build free segmap */
 246         si->base_mem += sizeof(struct free_segmap_info);
 247         si->base_mem += f2fs_bitmap_size(MAIN_SEGS(sbi));
 248         si->base_mem += f2fs_bitmap_size(MAIN_SECS(sbi));
 249
 250         /* build curseg */
 251         si->base_mem += sizeof(struct curseg_info) * NR_CURSEG_TYPE;
 252         si->base_mem += PAGE_SIZE * NR_CURSEG_TYPE;
 253
 254         /* build dirty segmap */
 255         si->base_mem += sizeof(struct dirty_seglist_info);
 256         si->base_mem += NR_DIRTY_TYPE * f2fs_bitmap_size(MAIN_SEGS(sbi));
 257         si->base_mem += f2fs_bitmap_size(MAIN_SECS(sbi));
 258
 259         /* build nm */
 260         si->base_mem += sizeof(struct f2fs_nm_info);
 261         si->base_mem += __bitmap_size(sbi, NAT_BITMAP);
 262         si->base_mem += (NM_I(sbi)->nat_bits_blocks << F2FS_BLKSIZE_BITS);
 263         si->base_mem += NM_I(sbi)->nat_blocks *
 264                                 f2fs_bitmap_size(NAT_ENTRY_PER_BLOCK);
 265         si->base_mem += NM_I(sbi)->nat_blocks / 8;
 266         si->base_mem += NM_I(sbi)->nat_blocks * sizeof(unsigned short);
 267
 268 get_cache:
 269         si->cache_mem = 0;
 270
 271         /* build gc */
 272         if (sbi->gc_thread)
 273                 si->cache_mem += sizeof(struct f2fs_gc_kthread);
 274
 275         /* build merge flush thread */
 276         if (SM_I(sbi)->fcc_info)
 277                 si->cache_mem += sizeof(struct flush_cmd_control);
 278         if (SM_I(sbi)->dcc_info) {
 279                 si->cache_mem += sizeof(struct discard_cmd_control);
 280                 si->cache_mem += sizeof(struct discard_cmd) *
 281                         atomic_read(&SM_I(sbi)->dcc_info->discard_cmd_cnt);
 282         }
 283
 284         /* free nids */
 285         si->cache_mem += (NM_I(sbi)->nid_cnt[FREE_NID] +
 286                                 NM_I(sbi)->nid_cnt[PREALLOC_NID]) *
 287                                 sizeof(struct free_nid);
 288         si->cache_mem += NM_I(sbi)->nat_cnt[TOTAL_NAT] *
 289                                 sizeof(struct nat_entry);
 290         si->cache_mem += NM_I(sbi)->nat_cnt[DIRTY_NAT] *
 291                                 sizeof(struct nat_entry_set);
 292         si->cache_mem += si->inmem_pages * sizeof(struct inmem_pages);
 293         for (i = 0; i < MAX_INO_ENTRY; i++)
 294                 si->cache_mem += sbi->im[i].ino_num * sizeof(struct ino_entry);
 295         si->cache_mem += atomic_read(&sbi->total_ext_tree) *
 296                                                 sizeof(struct extent_tree);
 297         si->cache_mem += atomic_read(&sbi->total_ext_node) *
 298                                                 sizeof(struct extent_node);
 299
 300         si->page_mem = 0;
 301         if (sbi->node_inode) {
 302                 unsigned npages = NODE_MAPPING(sbi)->nrpages;
 303                 si->page_mem += (unsigned long long)npages << PAGE_SHIFT;
 304         }
 305         if (sbi->meta_inode) {
 306                 unsigned npages = META_MAPPING(sbi)->nrpages;
 307                 si->page_mem += (unsigned long long)npages << PAGE_SHIFT;
 308         }
 309 }
 310
 311 static int stat_show(struct seq_file *s, void *v)
 312 {
 313         struct f2fs_stat_info *si;
 314         int i = 0;
 315         int j;
 316
 317         mutex_lock(&f2fs_stat_mutex);
 318         list_for_each_entry(si, &f2fs_stat_list, stat_list) {
 319                 update_general_status(si->sbi);
 320
 321                 seq_printf(s, "\n=====[ partition info(%pg). #%d, %s, CP: %s]=====\n",
 322                         si->sbi->sb->s_bdev, i++,
 323                         f2fs_readonly(si->sbi->sb) ? "RO": "RW",
 324                         is_set_ckpt_flags(si->sbi, CP_DISABLED_FLAG) ?
 325                         "Disabled": (f2fs_cp_error(si->sbi) ? "Error": "Good"));
 326                 seq_printf(s, "[SB: 1] [CP: 2] [SIT: %d] [NAT: %d] ",
 327                            si->sit_area_segs, si->nat_area_segs);
 328                 seq_printf(s, "[SSA: %d] [MAIN: %d",
 329                            si->ssa_area_segs, si->main_area_segs);
 330                 seq_printf(s, "(OverProv:%d Resv:%d)]\n\n",
 331                            si->overp_segs, si->rsvd_segs);
 332                 seq_printf(s, "Current Time Sec: %llu / Mounted Time Sec: %llu\n\n",
 333                                         ktime_get_boottime_seconds(),
 334                                         SIT_I(si->sbi)->mounted_time);
 335                 if (test_opt(si->sbi, DISCARD))
 336                         seq_printf(s, "Utilization: %u%% (%u valid blocks, %u discard blocks)\n",
 337                                 si->utilization, si->valid_count, si->discard_blks);
 338                 else
 339                         seq_printf(s, "Utilization: %u%% (%u valid blocks)\n",
 340                                 si->utilization, si->valid_count);
 341
 342                 seq_printf(s, "  - Node: %u (Inode: %u, ",
 343                            si->valid_node_count, si->valid_inode_count);
 344                 seq_printf(s, "Other: %u)\n  - Data: %u\n",
 345                            si->valid_node_count - si->valid_inode_count,
 346                            si->valid_count - si->valid_node_count);
 347                 seq_printf(s, "  - Inline_xattr Inode: %u\n",
 348                            si->inline_xattr);
 349                 seq_printf(s, "  - Inline_data Inode: %u\n",
 350                            si->inline_inode);
 351                 seq_printf(s, "  - Inline_dentry Inode: %u\n",
 352                            si->inline_dir);
 353                 seq_printf(s, "  - Compressed Inode: %u, Blocks: %llu\n",
 354                            si->compr_inode, si->compr_blocks);
 355                 seq_printf(s, "  - Orphan/Append/Update Inode: %u, %u, %u\n",
 356                            si->orphans, si->append, si->update);
 357                 seq_printf(s, "\nMain area: %d segs, %d secs %d zones\n",
 358                            si->main_area_segs, si->main_area_sections,
 359                            si->main_area_zones);
 360                 seq_printf(s, "    TYPE         %8s %8s %8s %10s %10s %10s\n",
 361                            "segno", "secno", "zoneno", "dirty_seg", "full_seg", "valid_blk");
 362                 seq_printf(s, "  - COLD   data: %8d %8d %8d %10u %10u %10u\n",
 363                            si->curseg[CURSEG_COLD_DATA],
 364                            si->cursec[CURSEG_COLD_DATA],
 365                            si->curzone[CURSEG_COLD_DATA],
 366                            si->dirty_seg[CURSEG_COLD_DATA],
 367                            si->full_seg[CURSEG_COLD_DATA],
 368                            si->valid_blks[CURSEG_COLD_DATA]);
 369                 seq_printf(s, "  - WARM   data: %8d %8d %8d %10u %10u %10u\n",
 370                            si->curseg[CURSEG_WARM_DATA],
 371                            si->cursec[CURSEG_WARM_DATA],
 372                            si->curzone[CURSEG_WARM_DATA],
 373                            si->dirty_seg[CURSEG_WARM_DATA],
 374                            si->full_seg[CURSEG_WARM_DATA],
 375                            si->valid_blks[CURSEG_WARM_DATA]);
 376                 seq_printf(s, "  - HOT    data: %8d %8d %8d %10u %10u %10u\n",
 377                            si->curseg[CURSEG_HOT_DATA],
 378                            si->cursec[CURSEG_HOT_DATA],
 379                            si->curzone[CURSEG_HOT_DATA],
 380                            si->dirty_seg[CURSEG_HOT_DATA],
 381                            si->full_seg[CURSEG_HOT_DATA],
 382                            si->valid_blks[CURSEG_HOT_DATA]);
 383                 seq_printf(s, "  - Dir   dnode: %8d %8d %8d %10u %10u %10u\n",
 384                            si->curseg[CURSEG_HOT_NODE],
 385                            si->cursec[CURSEG_HOT_NODE],
 386                            si->curzone[CURSEG_HOT_NODE],
 387                            si->dirty_seg[CURSEG_HOT_NODE],
 388                            si->full_seg[CURSEG_HOT_NODE],
 389                            si->valid_blks[CURSEG_HOT_NODE]);
 390                 seq_printf(s, "  - File  dnode: %8d %8d %8d %10u %10u %10u\n",
 391                            si->curseg[CURSEG_WARM_NODE],
 392                            si->cursec[CURSEG_WARM_NODE],
 393                            si->curzone[CURSEG_WARM_NODE],
 394                            si->dirty_seg[CURSEG_WARM_NODE],
 395                            si->full_seg[CURSEG_WARM_NODE],
 396                            si->valid_blks[CURSEG_WARM_NODE]);
 397                 seq_printf(s, "  - Indir nodes: %8d %8d %8d %10u %10u %10u\n",
 398                            si->curseg[CURSEG_COLD_NODE],
 399                            si->cursec[CURSEG_COLD_NODE],
 400                            si->curzone[CURSEG_COLD_NODE],
 401                            si->dirty_seg[CURSEG_COLD_NODE],
 402                            si->full_seg[CURSEG_COLD_NODE],
 403                            si->valid_blks[CURSEG_COLD_NODE]);
 404                 seq_printf(s, "  - Pinned file: %8d %8d %8d\n",
 405                            si->curseg[CURSEG_COLD_DATA_PINNED],
 406                            si->cursec[CURSEG_COLD_DATA_PINNED],
 407                            si->curzone[CURSEG_COLD_DATA_PINNED]);
 408                 seq_printf(s, "  - ATGC   data: %8d %8d %8d\n",
 409                            si->curseg[CURSEG_ALL_DATA_ATGC],
 410                            si->cursec[CURSEG_ALL_DATA_ATGC],
 411                            si->curzone[CURSEG_ALL_DATA_ATGC]);
 412                 seq_printf(s, "\n  - Valid: %d\n  - Dirty: %d\n",
 413                            si->main_area_segs - si->dirty_count -
 414                            si->prefree_count - si->free_segs,
 415                            si->dirty_count);
 416                 seq_printf(s, "  - Prefree: %d\n  - Free: %d (%d)\n\n",
 417                            si->prefree_count, si->free_segs, si->free_secs);
 418                 seq_printf(s, "CP calls: %d (BG: %d)\n",
 419                                 si->cp_count, si->bg_cp_count);
 420                 seq_printf(s, "  - cp blocks : %u\n", si->meta_count[META_CP]);
 421                 seq_printf(s, "  - sit blocks : %u\n",
 422                                 si->meta_count[META_SIT]);
 423                 seq_printf(s, "  - nat blocks : %u\n",
 424                                 si->meta_count[META_NAT]);
 425                 seq_printf(s, "  - ssa blocks : %u\n",
 426                                 si->meta_count[META_SSA]);
 427                 seq_printf(s, "CP merge (Queued: %4d, Issued: %4d, Total: %4d, "
 428                                 "Cur time: %4d(ms), Peak time: %4d(ms))\n",
 429                                 si->nr_queued_ckpt, si->nr_issued_ckpt,
 430                                 si->nr_total_ckpt, si->cur_ckpt_time,
 431                                 si->peak_ckpt_time);
 432                 seq_printf(s, "GC calls: %d (BG: %d)\n",
 433                            si->call_count, si->bg_gc);
 434                 seq_printf(s, "  - data segments : %d (%d)\n",
 435                                 si->data_segs, si->bg_data_segs);
 436                 seq_printf(s, "  - node segments : %d (%d)\n",
 437                                 si->node_segs, si->bg_node_segs);
 438                 seq_printf(s, "Try to move %d blocks (BG: %d)\n", si->tot_blks,
 439                                 si->bg_data_blks + si->bg_node_blks);
 440                 seq_printf(s, "  - data blocks : %d (%d)\n", si->data_blks,
 441                                 si->bg_data_blks);
 442                 seq_printf(s, "  - node blocks : %d (%d)\n", si->node_blks,
 443                                 si->bg_node_blks);
 444                 seq_printf(s, "Skipped : atomic write %llu (%llu)\n",
 445                                 si->skipped_atomic_files[BG_GC] +
 446                                 si->skipped_atomic_files[FG_GC],
 447                                 si->skipped_atomic_files[BG_GC]);
 448                 seq_printf(s, "BG skip : IO: %u, Other: %u\n",
 449                                 si->io_skip_bggc, si->other_skip_bggc);
 450                 seq_puts(s, "\nExtent Cache:\n");
 451                 seq_printf(s, "  - Hit Count: L1-1:%llu L1-2:%llu L2:%llu\n",
 452                                 si->hit_largest, si->hit_cached,
 453                                 si->hit_rbtree);
 454                 seq_printf(s, "  - Hit Ratio: %llu%% (%llu / %llu)\n",
 455                                 !si->total_ext ? 0 :
 456                                 div64_u64(si->hit_total * 100, si->total_ext),
 457                                 si->hit_total, si->total_ext);
 458                 seq_printf(s, "  - Inner Struct Count: tree: %d(%d), node: %d\n",
 459                                 si->ext_tree, si->zombie_tree, si->ext_node);
 460                 seq_puts(s, "\nBalancing F2FS Async:\n");
 461                 seq_printf(s, "  - DIO (R: %4d, W: %4d)\n",
 462                            si->nr_dio_read, si->nr_dio_write);
 463                 seq_printf(s, "  - IO_R (Data: %4d, Node: %4d, Meta: %4d\n",
 464                            si->nr_rd_data, si->nr_rd_node, si->nr_rd_meta);
 465                 seq_printf(s, "  - IO_W (CP: %4d, Data: %4d, Flush: (%4d %4d %4d), "
 466                         "Discard: (%4d %4d)) cmd: %4d undiscard:%4u\n",
 467                            si->nr_wb_cp_data, si->nr_wb_data,
 468                            si->nr_flushing, si->nr_flushed,
 469                            si->flush_list_empty,
 470                            si->nr_discarding, si->nr_discarded,
 471                            si->nr_discard_cmd, si->undiscard_blks);
 472                 seq_printf(s, "  - inmem: %4d, atomic IO: %4d (Max. %4d), "
 473                         "volatile IO: %4d (Max. %4d)\n",
 474                            si->inmem_pages, si->aw_cnt, si->max_aw_cnt,
 475                            si->vw_cnt, si->max_vw_cnt);
 476                 seq_printf(s, "  - nodes: %4d in %4d\n",
 477                            si->ndirty_node, si->node_pages);
 478                 seq_printf(s, "  - dents: %4d in dirs:%4d (%4d)\n",
 479                            si->ndirty_dent, si->ndirty_dirs, si->ndirty_all);
 480                 seq_printf(s, "  - datas: %4d in files:%4d\n",
 481                            si->ndirty_data, si->ndirty_files);
 482                 seq_printf(s, "  - quota datas: %4d in quota files:%4d\n",
 483                            si->ndirty_qdata, si->nquota_files);
 484                 seq_printf(s, "  - meta: %4d in %4d\n",
 485                            si->ndirty_meta, si->meta_pages);
 486                 seq_printf(s, "  - imeta: %4d\n",
 487                            si->ndirty_imeta);
 488                 seq_printf(s, "  - NATs: %9d/%9d\n  - SITs: %9d/%9d\n",
 489                            si->dirty_nats, si->nats, si->dirty_sits, si->sits);
 490                 seq_printf(s, "  - free_nids: %9d/%9d\n  - alloc_nids: %9d\n",
 491                            si->free_nids, si->avail_nids, si->alloc_nids);
 492                 seq_puts(s, "\nDistribution of User Blocks:");
 493                 seq_puts(s, " [ valid | invalid | free ]\n");
 494                 seq_puts(s, "  [");
 495
 496                 for (j = 0; j < si->util_valid; j++)
 497                         seq_putc(s, '-');
 498                 seq_putc(s, '|');
 499
 500                 for (j = 0; j < si->util_invalid; j++)
 501                         seq_putc(s, '-');
 502                 seq_putc(s, '|');
 503
 504                 for (j = 0; j < si->util_free; j++)
 505                         seq_putc(s, '-');
 506                 seq_puts(s, "]\n\n");
 507                 seq_printf(s, "IPU: %u blocks\n", si->inplace_count);
 508                 seq_printf(s, "SSR: %u blocks in %u segments\n",
 509                            si->block_count[SSR], si->segment_count[SSR]);
 510                 seq_printf(s, "LFS: %u blocks in %u segments\n",
 511                            si->block_count[LFS], si->segment_count[LFS]);
 512
 513                 /* segment usage info */
 514                 f2fs_update_sit_info(si->sbi);
 515                 seq_printf(s, "\nBDF: %u, avg. vblocks: %u\n",
 516                            si->bimodal, si->avg_vblocks);
 517
 518                 /* memory footprint */
 519                 update_mem_info(si->sbi);
 520                 seq_printf(s, "\nMemory: %llu KB\n",
 521                         (si->base_mem + si->cache_mem + si->page_mem) >> 10);
 522                 seq_printf(s, "  - static: %llu KB\n",
 523                                 si->base_mem >> 10);
 524                 seq_printf(s, "  - cached: %llu KB\n",
 525                                 si->cache_mem >> 10);
 526                 seq_printf(s, "  - paged : %llu KB\n",
 527                                 si->page_mem >> 10);
 528         }
 529         mutex_unlock(&f2fs_stat_mutex);
 530         return 0;
 531 }
 532
 533 DEFINE_SHOW_ATTRIBUTE(stat);
 534 #endif
 535
 536 int f2fs_build_stats(struct f2fs_sb_info *sbi)
 537 {
 538         struct f2fs_super_block *raw_super = F2FS_RAW_SUPER(sbi);
 539         struct f2fs_stat_info *si;
 540         int i;
 541
 542         si = f2fs_kzalloc(sbi, sizeof(struct f2fs_stat_info), GFP_KERNEL);
 543         if (!si)
 544                 return -ENOMEM;
 545
 546         si->all_area_segs = le32_to_cpu(raw_super->segment_count);
 547         si->sit_area_segs = le32_to_cpu(raw_super->segment_count_sit);
 548         si->nat_area_segs = le32_to_cpu(raw_super->segment_count_nat);
 549         si->ssa_area_segs = le32_to_cpu(raw_super->segment_count_ssa);
 550         si->main_area_segs = le32_to_cpu(raw_super->segment_count_main);
 551         si->main_area_sections = le32_to_cpu(raw_super->section_count);
 552         si->main_area_zones = si->main_area_sections /
 553                                 le32_to_cpu(raw_super->secs_per_zone);
 554         si->sbi = sbi;
 555         sbi->stat_info = si;
 556
 557         atomic64_set(&sbi->total_hit_ext, 0);
 558         atomic64_set(&sbi->read_hit_rbtree, 0);
 559         atomic64_set(&sbi->read_hit_largest, 0);
 560         atomic64_set(&sbi->read_hit_cached, 0);
 561
 562         atomic_set(&sbi->inline_xattr, 0);
 563         atomic_set(&sbi->inline_inode, 0);
 564         atomic_set(&sbi->inline_dir, 0);
 565         atomic_set(&sbi->compr_inode, 0);
 566         atomic64_set(&sbi->compr_blocks, 0);
 567         atomic_set(&sbi->inplace_count, 0);
 568         for (i = META_CP; i < META_MAX; i++)
 569                 atomic_set(&sbi->meta_count[i], 0);
 570
 571         atomic_set(&sbi->vw_cnt, 0);
 572         atomic_set(&sbi->max_aw_cnt, 0);
 573         atomic_set(&sbi->max_vw_cnt, 0);
 574
 575         mutex_lock(&f2fs_stat_mutex);
 576         list_add_tail(&si->stat_list, &f2fs_stat_list);
 577         mutex_unlock(&f2fs_stat_mutex);
 578
 579         return 0;
 580 }
 581
 582 void f2fs_destroy_stats(struct f2fs_sb_info *sbi)
 583 {
 584         struct f2fs_stat_info *si = F2FS_STAT(sbi);
 585
 586         mutex_lock(&f2fs_stat_mutex);
 587         list_del(&si->stat_list);
 588         mutex_unlock(&f2fs_stat_mutex);
 589
 590         kfree(si);
 591 }
 592
 593 void __init f2fs_create_root_stats(void)
 594 {
 595 #ifdef CONFIG_DEBUG_FS
 596         f2fs_debugfs_root = debugfs_create_dir("f2fs", NULL);
 597
 598         debugfs_create_file("status", S_IRUGO, f2fs_debugfs_root, NULL,
 599                             &stat_fops);
 600 #endif
 601 }
 602
 603 void f2fs_destroy_root_stats(void)
 604 {
 605 #ifdef CONFIG_DEBUG_FS
 606         debugfs_remove_recursive(f2fs_debugfs_root);
 607         f2fs_debugfs_root = NULL;
 608 #endif
 609 }