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->io_skip_bggc = sbi->io_skip_bggc; 105 si->other_skip_bggc = sbi->other_skip_bggc; 106 si->skipped_atomic_files[BG_GC] = sbi->skipped_atomic_files[BG_GC]; 107 si->skipped_atomic_files[FG_GC] = sbi->skipped_atomic_files[FG_GC]; 108 si->util_free = (int)(free_user_blocks(sbi) >> sbi->log_blocks_per_seg) 109 * 100 / (int)(sbi->user_block_count >> sbi->log_blocks_per_seg) 110 / 2; 111 si->util_valid = (int)(written_block_count(sbi) >> 112 sbi->log_blocks_per_seg) 113 * 100 / (int)(sbi->user_block_count >> sbi->log_blocks_per_seg) 114 / 2; 115 si->util_invalid = 50 - si->util_free - si->util_valid; 116 for (i = CURSEG_HOT_DATA; i <= CURSEG_COLD_NODE; i++) { 117 struct curseg_info *curseg = CURSEG_I(sbi, i); 118 si->curseg[i] = curseg->segno; 119 si->cursec[i] = GET_SEC_FROM_SEG(sbi, curseg->segno); 120 si->curzone[i] = GET_ZONE_FROM_SEC(sbi, si->cursec[i]); 121 } 122 123 for (i = META_CP; i < META_MAX; i++) 124 si->meta_count[i] = atomic_read(&sbi->meta_count[i]); 125 126 for (i = 0; i < 2; i++) { 127 si->segment_count[i] = sbi->segment_count[i]; 128 si->block_count[i] = sbi->block_count[i]; 129 } 130 131 si->inplace_count = atomic_read(&sbi->inplace_count); 132 } 133 134 /* 135 * This function calculates BDF of every segments 136 */ 137 static void update_sit_info(struct f2fs_sb_info *sbi) 138 { 139 struct f2fs_stat_info *si = F2FS_STAT(sbi); 140 unsigned long long blks_per_sec, hblks_per_sec, total_vblocks; 141 unsigned long long bimodal, dist; 142 unsigned int segno, vblocks; 143 int ndirty = 0; 144 145 bimodal = 0; 146 total_vblocks = 0; 147 blks_per_sec = BLKS_PER_SEC(sbi); 148 hblks_per_sec = blks_per_sec / 2; 149 for (segno = 0; segno < MAIN_SEGS(sbi); segno += sbi->segs_per_sec) { 150 vblocks = get_valid_blocks(sbi, segno, true); 151 dist = abs(vblocks - hblks_per_sec); 152 bimodal += dist * dist; 153 154 if (vblocks > 0 && vblocks < blks_per_sec) { 155 total_vblocks += vblocks; 156 ndirty++; 157 } 158 } 159 dist = div_u64(MAIN_SECS(sbi) * hblks_per_sec * hblks_per_sec, 100); 160 si->bimodal = div64_u64(bimodal, dist); 161 if (si->dirty_count) 162 si->avg_vblocks = div_u64(total_vblocks, ndirty); 163 else 164 si->avg_vblocks = 0; 165 } 166 167 /* 168 * This function calculates memory footprint. 169 */ 170 static void update_mem_info(struct f2fs_sb_info *sbi) 171 { 172 struct f2fs_stat_info *si = F2FS_STAT(sbi); 173 unsigned npages; 174 int i; 175 176 if (si->base_mem) 177 goto get_cache; 178 179 /* build stat */ 180 si->base_mem = sizeof(struct f2fs_stat_info); 181 182 /* build superblock */ 183 si->base_mem += sizeof(struct f2fs_sb_info) + sbi->sb->s_blocksize; 184 si->base_mem += 2 * sizeof(struct f2fs_inode_info); 185 si->base_mem += sizeof(*sbi->ckpt); 186 187 /* build sm */ 188 si->base_mem += sizeof(struct f2fs_sm_info); 189 190 /* build sit */ 191 si->base_mem += sizeof(struct sit_info); 192 si->base_mem += MAIN_SEGS(sbi) * sizeof(struct seg_entry); 193 si->base_mem += f2fs_bitmap_size(MAIN_SEGS(sbi)); 194 si->base_mem += 2 * SIT_VBLOCK_MAP_SIZE * MAIN_SEGS(sbi); 195 si->base_mem += SIT_VBLOCK_MAP_SIZE * MAIN_SEGS(sbi); 196 si->base_mem += SIT_VBLOCK_MAP_SIZE; 197 if (sbi->segs_per_sec > 1) 198 si->base_mem += MAIN_SECS(sbi) * sizeof(struct sec_entry); 199 si->base_mem += __bitmap_size(sbi, SIT_BITMAP); 200 201 /* build free segmap */ 202 si->base_mem += sizeof(struct free_segmap_info); 203 si->base_mem += f2fs_bitmap_size(MAIN_SEGS(sbi)); 204 si->base_mem += f2fs_bitmap_size(MAIN_SECS(sbi)); 205 206 /* build curseg */ 207 si->base_mem += sizeof(struct curseg_info) * NR_CURSEG_TYPE; 208 si->base_mem += PAGE_SIZE * NR_CURSEG_TYPE; 209 210 /* build dirty segmap */ 211 si->base_mem += sizeof(struct dirty_seglist_info); 212 si->base_mem += NR_DIRTY_TYPE * f2fs_bitmap_size(MAIN_SEGS(sbi)); 213 si->base_mem += f2fs_bitmap_size(MAIN_SECS(sbi)); 214 215 /* build nm */ 216 si->base_mem += sizeof(struct f2fs_nm_info); 217 si->base_mem += __bitmap_size(sbi, NAT_BITMAP); 218 si->base_mem += (NM_I(sbi)->nat_bits_blocks << F2FS_BLKSIZE_BITS); 219 si->base_mem += NM_I(sbi)->nat_blocks * 220 f2fs_bitmap_size(NAT_ENTRY_PER_BLOCK); 221 si->base_mem += NM_I(sbi)->nat_blocks / 8; 222 si->base_mem += NM_I(sbi)->nat_blocks * sizeof(unsigned short); 223 224 get_cache: 225 si->cache_mem = 0; 226 227 /* build gc */ 228 if (sbi->gc_thread) 229 si->cache_mem += sizeof(struct f2fs_gc_kthread); 230 231 /* build merge flush thread */ 232 if (SM_I(sbi)->fcc_info) 233 si->cache_mem += sizeof(struct flush_cmd_control); 234 if (SM_I(sbi)->dcc_info) { 235 si->cache_mem += sizeof(struct discard_cmd_control); 236 si->cache_mem += sizeof(struct discard_cmd) * 237 atomic_read(&SM_I(sbi)->dcc_info->discard_cmd_cnt); 238 } 239 240 /* free nids */ 241 si->cache_mem += (NM_I(sbi)->nid_cnt[FREE_NID] + 242 NM_I(sbi)->nid_cnt[PREALLOC_NID]) * 243 sizeof(struct free_nid); 244 si->cache_mem += NM_I(sbi)->nat_cnt * sizeof(struct nat_entry); 245 si->cache_mem += NM_I(sbi)->dirty_nat_cnt * 246 sizeof(struct nat_entry_set); 247 si->cache_mem += si->inmem_pages * sizeof(struct inmem_pages); 248 for (i = 0; i < MAX_INO_ENTRY; i++) 249 si->cache_mem += sbi->im[i].ino_num * sizeof(struct ino_entry); 250 si->cache_mem += atomic_read(&sbi->total_ext_tree) * 251 sizeof(struct extent_tree); 252 si->cache_mem += atomic_read(&sbi->total_ext_node) * 253 sizeof(struct extent_node); 254 255 si->page_mem = 0; 256 npages = NODE_MAPPING(sbi)->nrpages; 257 si->page_mem += (unsigned long long)npages << PAGE_SHIFT; 258 npages = META_MAPPING(sbi)->nrpages; 259 si->page_mem += (unsigned long long)npages << PAGE_SHIFT; 260 } 261 262 static int stat_show(struct seq_file *s, void *v) 263 { 264 struct f2fs_stat_info *si; 265 int i = 0; 266 int j; 267 268 mutex_lock(&f2fs_stat_mutex); 269 list_for_each_entry(si, &f2fs_stat_list, stat_list) { 270 update_general_status(si->sbi); 271 272 seq_printf(s, "\n=====[ partition info(%pg). #%d, %s, CP: %s]=====\n", 273 si->sbi->sb->s_bdev, i++, 274 f2fs_readonly(si->sbi->sb) ? "RO": "RW", 275 f2fs_cp_error(si->sbi) ? "Error": "Good"); 276 seq_printf(s, "[SB: 1] [CP: 2] [SIT: %d] [NAT: %d] ", 277 si->sit_area_segs, si->nat_area_segs); 278 seq_printf(s, "[SSA: %d] [MAIN: %d", 279 si->ssa_area_segs, si->main_area_segs); 280 seq_printf(s, "(OverProv:%d Resv:%d)]\n\n", 281 si->overp_segs, si->rsvd_segs); 282 if (test_opt(si->sbi, DISCARD)) 283 seq_printf(s, "Utilization: %u%% (%u valid blocks, %u discard blocks)\n", 284 si->utilization, si->valid_count, si->discard_blks); 285 else 286 seq_printf(s, "Utilization: %u%% (%u valid blocks)\n", 287 si->utilization, si->valid_count); 288 289 seq_printf(s, " - Node: %u (Inode: %u, ", 290 si->valid_node_count, si->valid_inode_count); 291 seq_printf(s, "Other: %u)\n - Data: %u\n", 292 si->valid_node_count - si->valid_inode_count, 293 si->valid_count - si->valid_node_count); 294 seq_printf(s, " - Inline_xattr Inode: %u\n", 295 si->inline_xattr); 296 seq_printf(s, " - Inline_data Inode: %u\n", 297 si->inline_inode); 298 seq_printf(s, " - Inline_dentry Inode: %u\n", 299 si->inline_dir); 300 seq_printf(s, " - Orphan/Append/Update Inode: %u, %u, %u\n", 301 si->orphans, si->append, si->update); 302 seq_printf(s, "\nMain area: %d segs, %d secs %d zones\n", 303 si->main_area_segs, si->main_area_sections, 304 si->main_area_zones); 305 seq_printf(s, " - COLD data: %d, %d, %d\n", 306 si->curseg[CURSEG_COLD_DATA], 307 si->cursec[CURSEG_COLD_DATA], 308 si->curzone[CURSEG_COLD_DATA]); 309 seq_printf(s, " - WARM data: %d, %d, %d\n", 310 si->curseg[CURSEG_WARM_DATA], 311 si->cursec[CURSEG_WARM_DATA], 312 si->curzone[CURSEG_WARM_DATA]); 313 seq_printf(s, " - HOT data: %d, %d, %d\n", 314 si->curseg[CURSEG_HOT_DATA], 315 si->cursec[CURSEG_HOT_DATA], 316 si->curzone[CURSEG_HOT_DATA]); 317 seq_printf(s, " - Dir dnode: %d, %d, %d\n", 318 si->curseg[CURSEG_HOT_NODE], 319 si->cursec[CURSEG_HOT_NODE], 320 si->curzone[CURSEG_HOT_NODE]); 321 seq_printf(s, " - File dnode: %d, %d, %d\n", 322 si->curseg[CURSEG_WARM_NODE], 323 si->cursec[CURSEG_WARM_NODE], 324 si->curzone[CURSEG_WARM_NODE]); 325 seq_printf(s, " - Indir nodes: %d, %d, %d\n", 326 si->curseg[CURSEG_COLD_NODE], 327 si->cursec[CURSEG_COLD_NODE], 328 si->curzone[CURSEG_COLD_NODE]); 329 seq_printf(s, "\n - Valid: %d\n - Dirty: %d\n", 330 si->main_area_segs - si->dirty_count - 331 si->prefree_count - si->free_segs, 332 si->dirty_count); 333 seq_printf(s, " - Prefree: %d\n - Free: %d (%d)\n\n", 334 si->prefree_count, si->free_segs, si->free_secs); 335 seq_printf(s, "CP calls: %d (BG: %d)\n", 336 si->cp_count, si->bg_cp_count); 337 seq_printf(s, " - cp blocks : %u\n", si->meta_count[META_CP]); 338 seq_printf(s, " - sit blocks : %u\n", 339 si->meta_count[META_SIT]); 340 seq_printf(s, " - nat blocks : %u\n", 341 si->meta_count[META_NAT]); 342 seq_printf(s, " - ssa blocks : %u\n", 343 si->meta_count[META_SSA]); 344 seq_printf(s, "GC calls: %d (BG: %d)\n", 345 si->call_count, si->bg_gc); 346 seq_printf(s, " - data segments : %d (%d)\n", 347 si->data_segs, si->bg_data_segs); 348 seq_printf(s, " - node segments : %d (%d)\n", 349 si->node_segs, si->bg_node_segs); 350 seq_printf(s, "Try to move %d blocks (BG: %d)\n", si->tot_blks, 351 si->bg_data_blks + si->bg_node_blks); 352 seq_printf(s, " - data blocks : %d (%d)\n", si->data_blks, 353 si->bg_data_blks); 354 seq_printf(s, " - node blocks : %d (%d)\n", si->node_blks, 355 si->bg_node_blks); 356 seq_printf(s, "Skipped : atomic write %llu (%llu)\n", 357 si->skipped_atomic_files[BG_GC] + 358 si->skipped_atomic_files[FG_GC], 359 si->skipped_atomic_files[BG_GC]); 360 seq_printf(s, "BG skip : IO: %u, Other: %u\n", 361 si->io_skip_bggc, si->other_skip_bggc); 362 seq_puts(s, "\nExtent Cache:\n"); 363 seq_printf(s, " - Hit Count: L1-1:%llu L1-2:%llu L2:%llu\n", 364 si->hit_largest, si->hit_cached, 365 si->hit_rbtree); 366 seq_printf(s, " - Hit Ratio: %llu%% (%llu / %llu)\n", 367 !si->total_ext ? 0 : 368 div64_u64(si->hit_total * 100, si->total_ext), 369 si->hit_total, si->total_ext); 370 seq_printf(s, " - Inner Struct Count: tree: %d(%d), node: %d\n", 371 si->ext_tree, si->zombie_tree, si->ext_node); 372 seq_puts(s, "\nBalancing F2FS Async:\n"); 373 seq_printf(s, " - IO (CP: %4d, Data: %4d, Flush: (%4d %4d %4d), " 374 "Discard: (%4d %4d)) cmd: %4d undiscard:%4u\n", 375 si->nr_wb_cp_data, si->nr_wb_data, 376 si->nr_flushing, si->nr_flushed, 377 si->flush_list_empty, 378 si->nr_discarding, si->nr_discarded, 379 si->nr_discard_cmd, si->undiscard_blks); 380 seq_printf(s, " - inmem: %4d, atomic IO: %4d (Max. %4d), " 381 "volatile IO: %4d (Max. %4d)\n", 382 si->inmem_pages, si->aw_cnt, si->max_aw_cnt, 383 si->vw_cnt, si->max_vw_cnt); 384 seq_printf(s, " - nodes: %4d in %4d\n", 385 si->ndirty_node, si->node_pages); 386 seq_printf(s, " - dents: %4d in dirs:%4d (%4d)\n", 387 si->ndirty_dent, si->ndirty_dirs, si->ndirty_all); 388 seq_printf(s, " - datas: %4d in files:%4d\n", 389 si->ndirty_data, si->ndirty_files); 390 seq_printf(s, " - quota datas: %4d in quota files:%4d\n", 391 si->ndirty_qdata, si->nquota_files); 392 seq_printf(s, " - meta: %4d in %4d\n", 393 si->ndirty_meta, si->meta_pages); 394 seq_printf(s, " - imeta: %4d\n", 395 si->ndirty_imeta); 396 seq_printf(s, " - NATs: %9d/%9d\n - SITs: %9d/%9d\n", 397 si->dirty_nats, si->nats, si->dirty_sits, si->sits); 398 seq_printf(s, " - free_nids: %9d/%9d\n - alloc_nids: %9d\n", 399 si->free_nids, si->avail_nids, si->alloc_nids); 400 seq_puts(s, "\nDistribution of User Blocks:"); 401 seq_puts(s, " [ valid | invalid | free ]\n"); 402 seq_puts(s, " ["); 403 404 for (j = 0; j < si->util_valid; j++) 405 seq_putc(s, '-'); 406 seq_putc(s, '|'); 407 408 for (j = 0; j < si->util_invalid; j++) 409 seq_putc(s, '-'); 410 seq_putc(s, '|'); 411 412 for (j = 0; j < si->util_free; j++) 413 seq_putc(s, '-'); 414 seq_puts(s, "]\n\n"); 415 seq_printf(s, "IPU: %u blocks\n", si->inplace_count); 416 seq_printf(s, "SSR: %u blocks in %u segments\n", 417 si->block_count[SSR], si->segment_count[SSR]); 418 seq_printf(s, "LFS: %u blocks in %u segments\n", 419 si->block_count[LFS], si->segment_count[LFS]); 420 421 /* segment usage info */ 422 update_sit_info(si->sbi); 423 seq_printf(s, "\nBDF: %u, avg. vblocks: %u\n", 424 si->bimodal, si->avg_vblocks); 425 426 /* memory footprint */ 427 update_mem_info(si->sbi); 428 seq_printf(s, "\nMemory: %llu KB\n", 429 (si->base_mem + si->cache_mem + si->page_mem) >> 10); 430 seq_printf(s, " - static: %llu KB\n", 431 si->base_mem >> 10); 432 seq_printf(s, " - cached: %llu KB\n", 433 si->cache_mem >> 10); 434 seq_printf(s, " - paged : %llu KB\n", 435 si->page_mem >> 10); 436 } 437 mutex_unlock(&f2fs_stat_mutex); 438 return 0; 439 } 440 441 static int stat_open(struct inode *inode, struct file *file) 442 { 443 return single_open(file, stat_show, inode->i_private); 444 } 445 446 static const struct file_operations stat_fops = { 447 .owner = THIS_MODULE, 448 .open = stat_open, 449 .read = seq_read, 450 .llseek = seq_lseek, 451 .release = single_release, 452 }; 453 454 int f2fs_build_stats(struct f2fs_sb_info *sbi) 455 { 456 struct f2fs_super_block *raw_super = F2FS_RAW_SUPER(sbi); 457 struct f2fs_stat_info *si; 458 int i; 459 460 si = f2fs_kzalloc(sbi, sizeof(struct f2fs_stat_info), GFP_KERNEL); 461 if (!si) 462 return -ENOMEM; 463 464 si->all_area_segs = le32_to_cpu(raw_super->segment_count); 465 si->sit_area_segs = le32_to_cpu(raw_super->segment_count_sit); 466 si->nat_area_segs = le32_to_cpu(raw_super->segment_count_nat); 467 si->ssa_area_segs = le32_to_cpu(raw_super->segment_count_ssa); 468 si->main_area_segs = le32_to_cpu(raw_super->segment_count_main); 469 si->main_area_sections = le32_to_cpu(raw_super->section_count); 470 si->main_area_zones = si->main_area_sections / 471 le32_to_cpu(raw_super->secs_per_zone); 472 si->sbi = sbi; 473 sbi->stat_info = si; 474 475 atomic64_set(&sbi->total_hit_ext, 0); 476 atomic64_set(&sbi->read_hit_rbtree, 0); 477 atomic64_set(&sbi->read_hit_largest, 0); 478 atomic64_set(&sbi->read_hit_cached, 0); 479 480 atomic_set(&sbi->inline_xattr, 0); 481 atomic_set(&sbi->inline_inode, 0); 482 atomic_set(&sbi->inline_dir, 0); 483 atomic_set(&sbi->inplace_count, 0); 484 for (i = META_CP; i < META_MAX; i++) 485 atomic_set(&sbi->meta_count[i], 0); 486 487 atomic_set(&sbi->aw_cnt, 0); 488 atomic_set(&sbi->vw_cnt, 0); 489 atomic_set(&sbi->max_aw_cnt, 0); 490 atomic_set(&sbi->max_vw_cnt, 0); 491 492 mutex_lock(&f2fs_stat_mutex); 493 list_add_tail(&si->stat_list, &f2fs_stat_list); 494 mutex_unlock(&f2fs_stat_mutex); 495 496 return 0; 497 } 498 499 void f2fs_destroy_stats(struct f2fs_sb_info *sbi) 500 { 501 struct f2fs_stat_info *si = F2FS_STAT(sbi); 502 503 mutex_lock(&f2fs_stat_mutex); 504 list_del(&si->stat_list); 505 mutex_unlock(&f2fs_stat_mutex); 506 507 kfree(si); 508 } 509 510 int __init f2fs_create_root_stats(void) 511 { 512 struct dentry *file; 513 514 f2fs_debugfs_root = debugfs_create_dir("f2fs", NULL); 515 if (!f2fs_debugfs_root) 516 return -ENOMEM; 517 518 file = debugfs_create_file("status", S_IRUGO, f2fs_debugfs_root, 519 NULL, &stat_fops); 520 if (!file) { 521 debugfs_remove(f2fs_debugfs_root); 522 f2fs_debugfs_root = NULL; 523 return -ENOMEM; 524 } 525 526 return 0; 527 } 528 529 void f2fs_destroy_root_stats(void) 530 { 531 if (!f2fs_debugfs_root) 532 return; 533 534 debugfs_remove_recursive(f2fs_debugfs_root); 535 f2fs_debugfs_root = NULL; 536 } 537