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 si->node_pages = NODE_MAPPING(sbi)->nrpages; 100 si->meta_pages = META_MAPPING(sbi)->nrpages; 101 si->nats = NM_I(sbi)->nat_cnt; 102 si->dirty_nats = NM_I(sbi)->dirty_nat_cnt; 103 si->sits = MAIN_SEGS(sbi); 104 si->dirty_sits = SIT_I(sbi)->dirty_sentries; 105 si->free_nids = NM_I(sbi)->nid_cnt[FREE_NID]; 106 si->avail_nids = NM_I(sbi)->available_nids; 107 si->alloc_nids = NM_I(sbi)->nid_cnt[PREALLOC_NID]; 108 si->bg_gc = sbi->bg_gc; 109 si->io_skip_bggc = sbi->io_skip_bggc; 110 si->other_skip_bggc = sbi->other_skip_bggc; 111 si->skipped_atomic_files[BG_GC] = sbi->skipped_atomic_files[BG_GC]; 112 si->skipped_atomic_files[FG_GC] = sbi->skipped_atomic_files[FG_GC]; 113 si->util_free = (int)(free_user_blocks(sbi) >> sbi->log_blocks_per_seg) 114 * 100 / (int)(sbi->user_block_count >> sbi->log_blocks_per_seg) 115 / 2; 116 si->util_valid = (int)(written_block_count(sbi) >> 117 sbi->log_blocks_per_seg) 118 * 100 / (int)(sbi->user_block_count >> sbi->log_blocks_per_seg) 119 / 2; 120 si->util_invalid = 50 - si->util_free - si->util_valid; 121 for (i = CURSEG_HOT_DATA; i <= CURSEG_COLD_NODE; i++) { 122 struct curseg_info *curseg = CURSEG_I(sbi, i); 123 si->curseg[i] = curseg->segno; 124 si->cursec[i] = GET_SEC_FROM_SEG(sbi, curseg->segno); 125 si->curzone[i] = GET_ZONE_FROM_SEC(sbi, si->cursec[i]); 126 } 127 128 for (i = META_CP; i < META_MAX; i++) 129 si->meta_count[i] = atomic_read(&sbi->meta_count[i]); 130 131 for (i = 0; i < 2; i++) { 132 si->segment_count[i] = sbi->segment_count[i]; 133 si->block_count[i] = sbi->block_count[i]; 134 } 135 136 si->inplace_count = atomic_read(&sbi->inplace_count); 137 } 138 139 /* 140 * This function calculates BDF of every segments 141 */ 142 static void update_sit_info(struct f2fs_sb_info *sbi) 143 { 144 struct f2fs_stat_info *si = F2FS_STAT(sbi); 145 unsigned long long blks_per_sec, hblks_per_sec, total_vblocks; 146 unsigned long long bimodal, dist; 147 unsigned int segno, vblocks; 148 int ndirty = 0; 149 150 bimodal = 0; 151 total_vblocks = 0; 152 blks_per_sec = BLKS_PER_SEC(sbi); 153 hblks_per_sec = blks_per_sec / 2; 154 for (segno = 0; segno < MAIN_SEGS(sbi); segno += sbi->segs_per_sec) { 155 vblocks = get_valid_blocks(sbi, segno, true); 156 dist = abs(vblocks - hblks_per_sec); 157 bimodal += dist * dist; 158 159 if (vblocks > 0 && vblocks < blks_per_sec) { 160 total_vblocks += vblocks; 161 ndirty++; 162 } 163 } 164 dist = div_u64(MAIN_SECS(sbi) * hblks_per_sec * hblks_per_sec, 100); 165 si->bimodal = div64_u64(bimodal, dist); 166 if (si->dirty_count) 167 si->avg_vblocks = div_u64(total_vblocks, ndirty); 168 else 169 si->avg_vblocks = 0; 170 } 171 172 /* 173 * This function calculates memory footprint. 174 */ 175 static void update_mem_info(struct f2fs_sb_info *sbi) 176 { 177 struct f2fs_stat_info *si = F2FS_STAT(sbi); 178 unsigned npages; 179 int i; 180 181 if (si->base_mem) 182 goto get_cache; 183 184 /* build stat */ 185 si->base_mem = sizeof(struct f2fs_stat_info); 186 187 /* build superblock */ 188 si->base_mem += sizeof(struct f2fs_sb_info) + sbi->sb->s_blocksize; 189 si->base_mem += 2 * sizeof(struct f2fs_inode_info); 190 si->base_mem += sizeof(*sbi->ckpt); 191 192 /* build sm */ 193 si->base_mem += sizeof(struct f2fs_sm_info); 194 195 /* build sit */ 196 si->base_mem += sizeof(struct sit_info); 197 si->base_mem += MAIN_SEGS(sbi) * sizeof(struct seg_entry); 198 si->base_mem += f2fs_bitmap_size(MAIN_SEGS(sbi)); 199 si->base_mem += 2 * SIT_VBLOCK_MAP_SIZE * MAIN_SEGS(sbi); 200 si->base_mem += SIT_VBLOCK_MAP_SIZE * MAIN_SEGS(sbi); 201 si->base_mem += SIT_VBLOCK_MAP_SIZE; 202 if (__is_large_section(sbi)) 203 si->base_mem += MAIN_SECS(sbi) * sizeof(struct sec_entry); 204 si->base_mem += __bitmap_size(sbi, SIT_BITMAP); 205 206 /* build free segmap */ 207 si->base_mem += sizeof(struct free_segmap_info); 208 si->base_mem += f2fs_bitmap_size(MAIN_SEGS(sbi)); 209 si->base_mem += f2fs_bitmap_size(MAIN_SECS(sbi)); 210 211 /* build curseg */ 212 si->base_mem += sizeof(struct curseg_info) * NR_CURSEG_TYPE; 213 si->base_mem += PAGE_SIZE * NR_CURSEG_TYPE; 214 215 /* build dirty segmap */ 216 si->base_mem += sizeof(struct dirty_seglist_info); 217 si->base_mem += NR_DIRTY_TYPE * f2fs_bitmap_size(MAIN_SEGS(sbi)); 218 si->base_mem += f2fs_bitmap_size(MAIN_SECS(sbi)); 219 220 /* build nm */ 221 si->base_mem += sizeof(struct f2fs_nm_info); 222 si->base_mem += __bitmap_size(sbi, NAT_BITMAP); 223 si->base_mem += (NM_I(sbi)->nat_bits_blocks << F2FS_BLKSIZE_BITS); 224 si->base_mem += NM_I(sbi)->nat_blocks * 225 f2fs_bitmap_size(NAT_ENTRY_PER_BLOCK); 226 si->base_mem += NM_I(sbi)->nat_blocks / 8; 227 si->base_mem += NM_I(sbi)->nat_blocks * sizeof(unsigned short); 228 229 get_cache: 230 si->cache_mem = 0; 231 232 /* build gc */ 233 if (sbi->gc_thread) 234 si->cache_mem += sizeof(struct f2fs_gc_kthread); 235 236 /* build merge flush thread */ 237 if (SM_I(sbi)->fcc_info) 238 si->cache_mem += sizeof(struct flush_cmd_control); 239 if (SM_I(sbi)->dcc_info) { 240 si->cache_mem += sizeof(struct discard_cmd_control); 241 si->cache_mem += sizeof(struct discard_cmd) * 242 atomic_read(&SM_I(sbi)->dcc_info->discard_cmd_cnt); 243 } 244 245 /* free nids */ 246 si->cache_mem += (NM_I(sbi)->nid_cnt[FREE_NID] + 247 NM_I(sbi)->nid_cnt[PREALLOC_NID]) * 248 sizeof(struct free_nid); 249 si->cache_mem += NM_I(sbi)->nat_cnt * sizeof(struct nat_entry); 250 si->cache_mem += NM_I(sbi)->dirty_nat_cnt * 251 sizeof(struct nat_entry_set); 252 si->cache_mem += si->inmem_pages * sizeof(struct inmem_pages); 253 for (i = 0; i < MAX_INO_ENTRY; i++) 254 si->cache_mem += sbi->im[i].ino_num * sizeof(struct ino_entry); 255 si->cache_mem += atomic_read(&sbi->total_ext_tree) * 256 sizeof(struct extent_tree); 257 si->cache_mem += atomic_read(&sbi->total_ext_node) * 258 sizeof(struct extent_node); 259 260 si->page_mem = 0; 261 npages = NODE_MAPPING(sbi)->nrpages; 262 si->page_mem += (unsigned long long)npages << PAGE_SHIFT; 263 npages = META_MAPPING(sbi)->nrpages; 264 si->page_mem += (unsigned long long)npages << PAGE_SHIFT; 265 } 266 267 static int stat_show(struct seq_file *s, void *v) 268 { 269 struct f2fs_stat_info *si; 270 int i = 0; 271 int j; 272 273 mutex_lock(&f2fs_stat_mutex); 274 list_for_each_entry(si, &f2fs_stat_list, stat_list) { 275 update_general_status(si->sbi); 276 277 seq_printf(s, "\n=====[ partition info(%pg). #%d, %s, CP: %s]=====\n", 278 si->sbi->sb->s_bdev, i++, 279 f2fs_readonly(si->sbi->sb) ? "RO": "RW", 280 is_set_ckpt_flags(si->sbi, CP_DISABLED_FLAG) ? 281 "Disabled": (f2fs_cp_error(si->sbi) ? "Error": "Good")); 282 seq_printf(s, "[SB: 1] [CP: 2] [SIT: %d] [NAT: %d] ", 283 si->sit_area_segs, si->nat_area_segs); 284 seq_printf(s, "[SSA: %d] [MAIN: %d", 285 si->ssa_area_segs, si->main_area_segs); 286 seq_printf(s, "(OverProv:%d Resv:%d)]\n\n", 287 si->overp_segs, si->rsvd_segs); 288 if (test_opt(si->sbi, DISCARD)) 289 seq_printf(s, "Utilization: %u%% (%u valid blocks, %u discard blocks)\n", 290 si->utilization, si->valid_count, si->discard_blks); 291 else 292 seq_printf(s, "Utilization: %u%% (%u valid blocks)\n", 293 si->utilization, si->valid_count); 294 295 seq_printf(s, " - Node: %u (Inode: %u, ", 296 si->valid_node_count, si->valid_inode_count); 297 seq_printf(s, "Other: %u)\n - Data: %u\n", 298 si->valid_node_count - si->valid_inode_count, 299 si->valid_count - si->valid_node_count); 300 seq_printf(s, " - Inline_xattr Inode: %u\n", 301 si->inline_xattr); 302 seq_printf(s, " - Inline_data Inode: %u\n", 303 si->inline_inode); 304 seq_printf(s, " - Inline_dentry Inode: %u\n", 305 si->inline_dir); 306 seq_printf(s, " - Orphan/Append/Update Inode: %u, %u, %u\n", 307 si->orphans, si->append, si->update); 308 seq_printf(s, "\nMain area: %d segs, %d secs %d zones\n", 309 si->main_area_segs, si->main_area_sections, 310 si->main_area_zones); 311 seq_printf(s, " - COLD data: %d, %d, %d\n", 312 si->curseg[CURSEG_COLD_DATA], 313 si->cursec[CURSEG_COLD_DATA], 314 si->curzone[CURSEG_COLD_DATA]); 315 seq_printf(s, " - WARM data: %d, %d, %d\n", 316 si->curseg[CURSEG_WARM_DATA], 317 si->cursec[CURSEG_WARM_DATA], 318 si->curzone[CURSEG_WARM_DATA]); 319 seq_printf(s, " - HOT data: %d, %d, %d\n", 320 si->curseg[CURSEG_HOT_DATA], 321 si->cursec[CURSEG_HOT_DATA], 322 si->curzone[CURSEG_HOT_DATA]); 323 seq_printf(s, " - Dir dnode: %d, %d, %d\n", 324 si->curseg[CURSEG_HOT_NODE], 325 si->cursec[CURSEG_HOT_NODE], 326 si->curzone[CURSEG_HOT_NODE]); 327 seq_printf(s, " - File dnode: %d, %d, %d\n", 328 si->curseg[CURSEG_WARM_NODE], 329 si->cursec[CURSEG_WARM_NODE], 330 si->curzone[CURSEG_WARM_NODE]); 331 seq_printf(s, " - Indir nodes: %d, %d, %d\n", 332 si->curseg[CURSEG_COLD_NODE], 333 si->cursec[CURSEG_COLD_NODE], 334 si->curzone[CURSEG_COLD_NODE]); 335 seq_printf(s, "\n - Valid: %d\n - Dirty: %d\n", 336 si->main_area_segs - si->dirty_count - 337 si->prefree_count - si->free_segs, 338 si->dirty_count); 339 seq_printf(s, " - Prefree: %d\n - Free: %d (%d)\n\n", 340 si->prefree_count, si->free_segs, si->free_secs); 341 seq_printf(s, "CP calls: %d (BG: %d)\n", 342 si->cp_count, si->bg_cp_count); 343 seq_printf(s, " - cp blocks : %u\n", si->meta_count[META_CP]); 344 seq_printf(s, " - sit blocks : %u\n", 345 si->meta_count[META_SIT]); 346 seq_printf(s, " - nat blocks : %u\n", 347 si->meta_count[META_NAT]); 348 seq_printf(s, " - ssa blocks : %u\n", 349 si->meta_count[META_SSA]); 350 seq_printf(s, "GC calls: %d (BG: %d)\n", 351 si->call_count, si->bg_gc); 352 seq_printf(s, " - data segments : %d (%d)\n", 353 si->data_segs, si->bg_data_segs); 354 seq_printf(s, " - node segments : %d (%d)\n", 355 si->node_segs, si->bg_node_segs); 356 seq_printf(s, "Try to move %d blocks (BG: %d)\n", si->tot_blks, 357 si->bg_data_blks + si->bg_node_blks); 358 seq_printf(s, " - data blocks : %d (%d)\n", si->data_blks, 359 si->bg_data_blks); 360 seq_printf(s, " - node blocks : %d (%d)\n", si->node_blks, 361 si->bg_node_blks); 362 seq_printf(s, "Skipped : atomic write %llu (%llu)\n", 363 si->skipped_atomic_files[BG_GC] + 364 si->skipped_atomic_files[FG_GC], 365 si->skipped_atomic_files[BG_GC]); 366 seq_printf(s, "BG skip : IO: %u, Other: %u\n", 367 si->io_skip_bggc, si->other_skip_bggc); 368 seq_puts(s, "\nExtent Cache:\n"); 369 seq_printf(s, " - Hit Count: L1-1:%llu L1-2:%llu L2:%llu\n", 370 si->hit_largest, si->hit_cached, 371 si->hit_rbtree); 372 seq_printf(s, " - Hit Ratio: %llu%% (%llu / %llu)\n", 373 !si->total_ext ? 0 : 374 div64_u64(si->hit_total * 100, si->total_ext), 375 si->hit_total, si->total_ext); 376 seq_printf(s, " - Inner Struct Count: tree: %d(%d), node: %d\n", 377 si->ext_tree, si->zombie_tree, si->ext_node); 378 seq_puts(s, "\nBalancing F2FS Async:\n"); 379 seq_printf(s, " - DIO (R: %4d, W: %4d)\n", 380 si->nr_dio_read, si->nr_dio_write); 381 seq_printf(s, " - IO_R (Data: %4d, Node: %4d, Meta: %4d\n", 382 si->nr_rd_data, si->nr_rd_node, si->nr_rd_meta); 383 seq_printf(s, " - IO_W (CP: %4d, Data: %4d, Flush: (%4d %4d %4d), " 384 "Discard: (%4d %4d)) cmd: %4d undiscard:%4u\n", 385 si->nr_wb_cp_data, si->nr_wb_data, 386 si->nr_flushing, si->nr_flushed, 387 si->flush_list_empty, 388 si->nr_discarding, si->nr_discarded, 389 si->nr_discard_cmd, si->undiscard_blks); 390 seq_printf(s, " - inmem: %4d, atomic IO: %4d (Max. %4d), " 391 "volatile IO: %4d (Max. %4d)\n", 392 si->inmem_pages, si->aw_cnt, si->max_aw_cnt, 393 si->vw_cnt, si->max_vw_cnt); 394 seq_printf(s, " - nodes: %4d in %4d\n", 395 si->ndirty_node, si->node_pages); 396 seq_printf(s, " - dents: %4d in dirs:%4d (%4d)\n", 397 si->ndirty_dent, si->ndirty_dirs, si->ndirty_all); 398 seq_printf(s, " - datas: %4d in files:%4d\n", 399 si->ndirty_data, si->ndirty_files); 400 seq_printf(s, " - quota datas: %4d in quota files:%4d\n", 401 si->ndirty_qdata, si->nquota_files); 402 seq_printf(s, " - meta: %4d in %4d\n", 403 si->ndirty_meta, si->meta_pages); 404 seq_printf(s, " - imeta: %4d\n", 405 si->ndirty_imeta); 406 seq_printf(s, " - NATs: %9d/%9d\n - SITs: %9d/%9d\n", 407 si->dirty_nats, si->nats, si->dirty_sits, si->sits); 408 seq_printf(s, " - free_nids: %9d/%9d\n - alloc_nids: %9d\n", 409 si->free_nids, si->avail_nids, si->alloc_nids); 410 seq_puts(s, "\nDistribution of User Blocks:"); 411 seq_puts(s, " [ valid | invalid | free ]\n"); 412 seq_puts(s, " ["); 413 414 for (j = 0; j < si->util_valid; j++) 415 seq_putc(s, '-'); 416 seq_putc(s, '|'); 417 418 for (j = 0; j < si->util_invalid; j++) 419 seq_putc(s, '-'); 420 seq_putc(s, '|'); 421 422 for (j = 0; j < si->util_free; j++) 423 seq_putc(s, '-'); 424 seq_puts(s, "]\n\n"); 425 seq_printf(s, "IPU: %u blocks\n", si->inplace_count); 426 seq_printf(s, "SSR: %u blocks in %u segments\n", 427 si->block_count[SSR], si->segment_count[SSR]); 428 seq_printf(s, "LFS: %u blocks in %u segments\n", 429 si->block_count[LFS], si->segment_count[LFS]); 430 431 /* segment usage info */ 432 update_sit_info(si->sbi); 433 seq_printf(s, "\nBDF: %u, avg. vblocks: %u\n", 434 si->bimodal, si->avg_vblocks); 435 436 /* memory footprint */ 437 update_mem_info(si->sbi); 438 seq_printf(s, "\nMemory: %llu KB\n", 439 (si->base_mem + si->cache_mem + si->page_mem) >> 10); 440 seq_printf(s, " - static: %llu KB\n", 441 si->base_mem >> 10); 442 seq_printf(s, " - cached: %llu KB\n", 443 si->cache_mem >> 10); 444 seq_printf(s, " - paged : %llu KB\n", 445 si->page_mem >> 10); 446 } 447 mutex_unlock(&f2fs_stat_mutex); 448 return 0; 449 } 450 451 DEFINE_SHOW_ATTRIBUTE(stat); 452 453 int f2fs_build_stats(struct f2fs_sb_info *sbi) 454 { 455 struct f2fs_super_block *raw_super = F2FS_RAW_SUPER(sbi); 456 struct f2fs_stat_info *si; 457 int i; 458 459 si = f2fs_kzalloc(sbi, sizeof(struct f2fs_stat_info), GFP_KERNEL); 460 if (!si) 461 return -ENOMEM; 462 463 si->all_area_segs = le32_to_cpu(raw_super->segment_count); 464 si->sit_area_segs = le32_to_cpu(raw_super->segment_count_sit); 465 si->nat_area_segs = le32_to_cpu(raw_super->segment_count_nat); 466 si->ssa_area_segs = le32_to_cpu(raw_super->segment_count_ssa); 467 si->main_area_segs = le32_to_cpu(raw_super->segment_count_main); 468 si->main_area_sections = le32_to_cpu(raw_super->section_count); 469 si->main_area_zones = si->main_area_sections / 470 le32_to_cpu(raw_super->secs_per_zone); 471 si->sbi = sbi; 472 sbi->stat_info = si; 473 474 atomic64_set(&sbi->total_hit_ext, 0); 475 atomic64_set(&sbi->read_hit_rbtree, 0); 476 atomic64_set(&sbi->read_hit_largest, 0); 477 atomic64_set(&sbi->read_hit_cached, 0); 478 479 atomic_set(&sbi->inline_xattr, 0); 480 atomic_set(&sbi->inline_inode, 0); 481 atomic_set(&sbi->inline_dir, 0); 482 atomic_set(&sbi->inplace_count, 0); 483 for (i = META_CP; i < META_MAX; i++) 484 atomic_set(&sbi->meta_count[i], 0); 485 486 atomic_set(&sbi->aw_cnt, 0); 487 atomic_set(&sbi->vw_cnt, 0); 488 atomic_set(&sbi->max_aw_cnt, 0); 489 atomic_set(&sbi->max_vw_cnt, 0); 490 491 mutex_lock(&f2fs_stat_mutex); 492 list_add_tail(&si->stat_list, &f2fs_stat_list); 493 mutex_unlock(&f2fs_stat_mutex); 494 495 return 0; 496 } 497 498 void f2fs_destroy_stats(struct f2fs_sb_info *sbi) 499 { 500 struct f2fs_stat_info *si = F2FS_STAT(sbi); 501 502 mutex_lock(&f2fs_stat_mutex); 503 list_del(&si->stat_list); 504 mutex_unlock(&f2fs_stat_mutex); 505 506 kvfree(si); 507 } 508 509 int __init f2fs_create_root_stats(void) 510 { 511 struct dentry *file; 512 513 f2fs_debugfs_root = debugfs_create_dir("f2fs", NULL); 514 if (!f2fs_debugfs_root) 515 return -ENOMEM; 516 517 file = debugfs_create_file("status", S_IRUGO, f2fs_debugfs_root, 518 NULL, &stat_fops); 519 if (!file) { 520 debugfs_remove(f2fs_debugfs_root); 521 f2fs_debugfs_root = NULL; 522 return -ENOMEM; 523 } 524 525 return 0; 526 } 527 528 void f2fs_destroy_root_stats(void) 529 { 530 if (!f2fs_debugfs_root) 531 return; 532 533 debugfs_remove_recursive(f2fs_debugfs_root); 534 f2fs_debugfs_root = NULL; 535 } 536