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 si->nr_rd_data = get_pages(sbi, F2FS_RD_DATA); 59 si->nr_rd_node = get_pages(sbi, F2FS_RD_NODE); 60 si->nr_rd_meta = get_pages(sbi, F2FS_RD_META); 61 if (SM_I(sbi) && SM_I(sbi)->fcc_info) { 62 si->nr_flushed = 63 atomic_read(&SM_I(sbi)->fcc_info->issued_flush); 64 si->nr_flushing = 65 atomic_read(&SM_I(sbi)->fcc_info->issing_flush); 66 si->flush_list_empty = 67 llist_empty(&SM_I(sbi)->fcc_info->issue_list); 68 } 69 if (SM_I(sbi) && SM_I(sbi)->dcc_info) { 70 si->nr_discarded = 71 atomic_read(&SM_I(sbi)->dcc_info->issued_discard); 72 si->nr_discarding = 73 atomic_read(&SM_I(sbi)->dcc_info->issing_discard); 74 si->nr_discard_cmd = 75 atomic_read(&SM_I(sbi)->dcc_info->discard_cmd_cnt); 76 si->undiscard_blks = SM_I(sbi)->dcc_info->undiscard_blks; 77 } 78 si->total_count = (int)sbi->user_block_count / sbi->blocks_per_seg; 79 si->rsvd_segs = reserved_segments(sbi); 80 si->overp_segs = overprovision_segments(sbi); 81 si->valid_count = valid_user_blocks(sbi); 82 si->discard_blks = discard_blocks(sbi); 83 si->valid_node_count = valid_node_count(sbi); 84 si->valid_inode_count = valid_inode_count(sbi); 85 si->inline_xattr = atomic_read(&sbi->inline_xattr); 86 si->inline_inode = atomic_read(&sbi->inline_inode); 87 si->inline_dir = atomic_read(&sbi->inline_dir); 88 si->append = sbi->im[APPEND_INO].ino_num; 89 si->update = sbi->im[UPDATE_INO].ino_num; 90 si->orphans = sbi->im[ORPHAN_INO].ino_num; 91 si->utilization = utilization(sbi); 92 93 si->free_segs = free_segments(sbi); 94 si->free_secs = free_sections(sbi); 95 si->prefree_count = prefree_segments(sbi); 96 si->dirty_count = dirty_segments(sbi); 97 si->node_pages = NODE_MAPPING(sbi)->nrpages; 98 si->meta_pages = META_MAPPING(sbi)->nrpages; 99 si->nats = NM_I(sbi)->nat_cnt; 100 si->dirty_nats = NM_I(sbi)->dirty_nat_cnt; 101 si->sits = MAIN_SEGS(sbi); 102 si->dirty_sits = SIT_I(sbi)->dirty_sentries; 103 si->free_nids = NM_I(sbi)->nid_cnt[FREE_NID]; 104 si->avail_nids = NM_I(sbi)->available_nids; 105 si->alloc_nids = NM_I(sbi)->nid_cnt[PREALLOC_NID]; 106 si->bg_gc = sbi->bg_gc; 107 si->io_skip_bggc = sbi->io_skip_bggc; 108 si->other_skip_bggc = sbi->other_skip_bggc; 109 si->skipped_atomic_files[BG_GC] = sbi->skipped_atomic_files[BG_GC]; 110 si->skipped_atomic_files[FG_GC] = sbi->skipped_atomic_files[FG_GC]; 111 si->util_free = (int)(free_user_blocks(sbi) >> sbi->log_blocks_per_seg) 112 * 100 / (int)(sbi->user_block_count >> sbi->log_blocks_per_seg) 113 / 2; 114 si->util_valid = (int)(written_block_count(sbi) >> 115 sbi->log_blocks_per_seg) 116 * 100 / (int)(sbi->user_block_count >> sbi->log_blocks_per_seg) 117 / 2; 118 si->util_invalid = 50 - si->util_free - si->util_valid; 119 for (i = CURSEG_HOT_DATA; i <= CURSEG_COLD_NODE; i++) { 120 struct curseg_info *curseg = CURSEG_I(sbi, i); 121 si->curseg[i] = curseg->segno; 122 si->cursec[i] = GET_SEC_FROM_SEG(sbi, curseg->segno); 123 si->curzone[i] = GET_ZONE_FROM_SEC(sbi, si->cursec[i]); 124 } 125 126 for (i = META_CP; i < META_MAX; i++) 127 si->meta_count[i] = atomic_read(&sbi->meta_count[i]); 128 129 for (i = 0; i < 2; i++) { 130 si->segment_count[i] = sbi->segment_count[i]; 131 si->block_count[i] = sbi->block_count[i]; 132 } 133 134 si->inplace_count = atomic_read(&sbi->inplace_count); 135 } 136 137 /* 138 * This function calculates BDF of every segments 139 */ 140 static void update_sit_info(struct f2fs_sb_info *sbi) 141 { 142 struct f2fs_stat_info *si = F2FS_STAT(sbi); 143 unsigned long long blks_per_sec, hblks_per_sec, total_vblocks; 144 unsigned long long bimodal, dist; 145 unsigned int segno, vblocks; 146 int ndirty = 0; 147 148 bimodal = 0; 149 total_vblocks = 0; 150 blks_per_sec = BLKS_PER_SEC(sbi); 151 hblks_per_sec = blks_per_sec / 2; 152 for (segno = 0; segno < MAIN_SEGS(sbi); segno += sbi->segs_per_sec) { 153 vblocks = get_valid_blocks(sbi, segno, true); 154 dist = abs(vblocks - hblks_per_sec); 155 bimodal += dist * dist; 156 157 if (vblocks > 0 && vblocks < blks_per_sec) { 158 total_vblocks += vblocks; 159 ndirty++; 160 } 161 } 162 dist = div_u64(MAIN_SECS(sbi) * hblks_per_sec * hblks_per_sec, 100); 163 si->bimodal = div64_u64(bimodal, dist); 164 if (si->dirty_count) 165 si->avg_vblocks = div_u64(total_vblocks, ndirty); 166 else 167 si->avg_vblocks = 0; 168 } 169 170 /* 171 * This function calculates memory footprint. 172 */ 173 static void update_mem_info(struct f2fs_sb_info *sbi) 174 { 175 struct f2fs_stat_info *si = F2FS_STAT(sbi); 176 unsigned npages; 177 int i; 178 179 if (si->base_mem) 180 goto get_cache; 181 182 /* build stat */ 183 si->base_mem = sizeof(struct f2fs_stat_info); 184 185 /* build superblock */ 186 si->base_mem += sizeof(struct f2fs_sb_info) + sbi->sb->s_blocksize; 187 si->base_mem += 2 * sizeof(struct f2fs_inode_info); 188 si->base_mem += sizeof(*sbi->ckpt); 189 190 /* build sm */ 191 si->base_mem += sizeof(struct f2fs_sm_info); 192 193 /* build sit */ 194 si->base_mem += sizeof(struct sit_info); 195 si->base_mem += MAIN_SEGS(sbi) * sizeof(struct seg_entry); 196 si->base_mem += f2fs_bitmap_size(MAIN_SEGS(sbi)); 197 si->base_mem += 2 * SIT_VBLOCK_MAP_SIZE * MAIN_SEGS(sbi); 198 si->base_mem += SIT_VBLOCK_MAP_SIZE * MAIN_SEGS(sbi); 199 si->base_mem += SIT_VBLOCK_MAP_SIZE; 200 if (sbi->segs_per_sec > 1) 201 si->base_mem += MAIN_SECS(sbi) * sizeof(struct sec_entry); 202 si->base_mem += __bitmap_size(sbi, SIT_BITMAP); 203 204 /* build free segmap */ 205 si->base_mem += sizeof(struct free_segmap_info); 206 si->base_mem += f2fs_bitmap_size(MAIN_SEGS(sbi)); 207 si->base_mem += f2fs_bitmap_size(MAIN_SECS(sbi)); 208 209 /* build curseg */ 210 si->base_mem += sizeof(struct curseg_info) * NR_CURSEG_TYPE; 211 si->base_mem += PAGE_SIZE * NR_CURSEG_TYPE; 212 213 /* build dirty segmap */ 214 si->base_mem += sizeof(struct dirty_seglist_info); 215 si->base_mem += NR_DIRTY_TYPE * f2fs_bitmap_size(MAIN_SEGS(sbi)); 216 si->base_mem += f2fs_bitmap_size(MAIN_SECS(sbi)); 217 218 /* build nm */ 219 si->base_mem += sizeof(struct f2fs_nm_info); 220 si->base_mem += __bitmap_size(sbi, NAT_BITMAP); 221 si->base_mem += (NM_I(sbi)->nat_bits_blocks << F2FS_BLKSIZE_BITS); 222 si->base_mem += NM_I(sbi)->nat_blocks * 223 f2fs_bitmap_size(NAT_ENTRY_PER_BLOCK); 224 si->base_mem += NM_I(sbi)->nat_blocks / 8; 225 si->base_mem += NM_I(sbi)->nat_blocks * sizeof(unsigned short); 226 227 get_cache: 228 si->cache_mem = 0; 229 230 /* build gc */ 231 if (sbi->gc_thread) 232 si->cache_mem += sizeof(struct f2fs_gc_kthread); 233 234 /* build merge flush thread */ 235 if (SM_I(sbi)->fcc_info) 236 si->cache_mem += sizeof(struct flush_cmd_control); 237 if (SM_I(sbi)->dcc_info) { 238 si->cache_mem += sizeof(struct discard_cmd_control); 239 si->cache_mem += sizeof(struct discard_cmd) * 240 atomic_read(&SM_I(sbi)->dcc_info->discard_cmd_cnt); 241 } 242 243 /* free nids */ 244 si->cache_mem += (NM_I(sbi)->nid_cnt[FREE_NID] + 245 NM_I(sbi)->nid_cnt[PREALLOC_NID]) * 246 sizeof(struct free_nid); 247 si->cache_mem += NM_I(sbi)->nat_cnt * sizeof(struct nat_entry); 248 si->cache_mem += NM_I(sbi)->dirty_nat_cnt * 249 sizeof(struct nat_entry_set); 250 si->cache_mem += si->inmem_pages * sizeof(struct inmem_pages); 251 for (i = 0; i < MAX_INO_ENTRY; i++) 252 si->cache_mem += sbi->im[i].ino_num * sizeof(struct ino_entry); 253 si->cache_mem += atomic_read(&sbi->total_ext_tree) * 254 sizeof(struct extent_tree); 255 si->cache_mem += atomic_read(&sbi->total_ext_node) * 256 sizeof(struct extent_node); 257 258 si->page_mem = 0; 259 npages = NODE_MAPPING(sbi)->nrpages; 260 si->page_mem += (unsigned long long)npages << PAGE_SHIFT; 261 npages = META_MAPPING(sbi)->nrpages; 262 si->page_mem += (unsigned long long)npages << PAGE_SHIFT; 263 } 264 265 static int stat_show(struct seq_file *s, void *v) 266 { 267 struct f2fs_stat_info *si; 268 int i = 0; 269 int j; 270 271 mutex_lock(&f2fs_stat_mutex); 272 list_for_each_entry(si, &f2fs_stat_list, stat_list) { 273 update_general_status(si->sbi); 274 275 seq_printf(s, "\n=====[ partition info(%pg). #%d, %s, CP: %s]=====\n", 276 si->sbi->sb->s_bdev, i++, 277 f2fs_readonly(si->sbi->sb) ? "RO": "RW", 278 is_set_ckpt_flags(si->sbi, CP_DISABLED_FLAG) ? 279 "Disabled": (f2fs_cp_error(si->sbi) ? "Error": "Good")); 280 seq_printf(s, "[SB: 1] [CP: 2] [SIT: %d] [NAT: %d] ", 281 si->sit_area_segs, si->nat_area_segs); 282 seq_printf(s, "[SSA: %d] [MAIN: %d", 283 si->ssa_area_segs, si->main_area_segs); 284 seq_printf(s, "(OverProv:%d Resv:%d)]\n\n", 285 si->overp_segs, si->rsvd_segs); 286 if (test_opt(si->sbi, DISCARD)) 287 seq_printf(s, "Utilization: %u%% (%u valid blocks, %u discard blocks)\n", 288 si->utilization, si->valid_count, si->discard_blks); 289 else 290 seq_printf(s, "Utilization: %u%% (%u valid blocks)\n", 291 si->utilization, si->valid_count); 292 293 seq_printf(s, " - Node: %u (Inode: %u, ", 294 si->valid_node_count, si->valid_inode_count); 295 seq_printf(s, "Other: %u)\n - Data: %u\n", 296 si->valid_node_count - si->valid_inode_count, 297 si->valid_count - si->valid_node_count); 298 seq_printf(s, " - Inline_xattr Inode: %u\n", 299 si->inline_xattr); 300 seq_printf(s, " - Inline_data Inode: %u\n", 301 si->inline_inode); 302 seq_printf(s, " - Inline_dentry Inode: %u\n", 303 si->inline_dir); 304 seq_printf(s, " - Orphan/Append/Update Inode: %u, %u, %u\n", 305 si->orphans, si->append, si->update); 306 seq_printf(s, "\nMain area: %d segs, %d secs %d zones\n", 307 si->main_area_segs, si->main_area_sections, 308 si->main_area_zones); 309 seq_printf(s, " - COLD data: %d, %d, %d\n", 310 si->curseg[CURSEG_COLD_DATA], 311 si->cursec[CURSEG_COLD_DATA], 312 si->curzone[CURSEG_COLD_DATA]); 313 seq_printf(s, " - WARM data: %d, %d, %d\n", 314 si->curseg[CURSEG_WARM_DATA], 315 si->cursec[CURSEG_WARM_DATA], 316 si->curzone[CURSEG_WARM_DATA]); 317 seq_printf(s, " - HOT data: %d, %d, %d\n", 318 si->curseg[CURSEG_HOT_DATA], 319 si->cursec[CURSEG_HOT_DATA], 320 si->curzone[CURSEG_HOT_DATA]); 321 seq_printf(s, " - Dir dnode: %d, %d, %d\n", 322 si->curseg[CURSEG_HOT_NODE], 323 si->cursec[CURSEG_HOT_NODE], 324 si->curzone[CURSEG_HOT_NODE]); 325 seq_printf(s, " - File dnode: %d, %d, %d\n", 326 si->curseg[CURSEG_WARM_NODE], 327 si->cursec[CURSEG_WARM_NODE], 328 si->curzone[CURSEG_WARM_NODE]); 329 seq_printf(s, " - Indir nodes: %d, %d, %d\n", 330 si->curseg[CURSEG_COLD_NODE], 331 si->cursec[CURSEG_COLD_NODE], 332 si->curzone[CURSEG_COLD_NODE]); 333 seq_printf(s, "\n - Valid: %d\n - Dirty: %d\n", 334 si->main_area_segs - si->dirty_count - 335 si->prefree_count - si->free_segs, 336 si->dirty_count); 337 seq_printf(s, " - Prefree: %d\n - Free: %d (%d)\n\n", 338 si->prefree_count, si->free_segs, si->free_secs); 339 seq_printf(s, "CP calls: %d (BG: %d)\n", 340 si->cp_count, si->bg_cp_count); 341 seq_printf(s, " - cp blocks : %u\n", si->meta_count[META_CP]); 342 seq_printf(s, " - sit blocks : %u\n", 343 si->meta_count[META_SIT]); 344 seq_printf(s, " - nat blocks : %u\n", 345 si->meta_count[META_NAT]); 346 seq_printf(s, " - ssa blocks : %u\n", 347 si->meta_count[META_SSA]); 348 seq_printf(s, "GC calls: %d (BG: %d)\n", 349 si->call_count, si->bg_gc); 350 seq_printf(s, " - data segments : %d (%d)\n", 351 si->data_segs, si->bg_data_segs); 352 seq_printf(s, " - node segments : %d (%d)\n", 353 si->node_segs, si->bg_node_segs); 354 seq_printf(s, "Try to move %d blocks (BG: %d)\n", si->tot_blks, 355 si->bg_data_blks + si->bg_node_blks); 356 seq_printf(s, " - data blocks : %d (%d)\n", si->data_blks, 357 si->bg_data_blks); 358 seq_printf(s, " - node blocks : %d (%d)\n", si->node_blks, 359 si->bg_node_blks); 360 seq_printf(s, "Skipped : atomic write %llu (%llu)\n", 361 si->skipped_atomic_files[BG_GC] + 362 si->skipped_atomic_files[FG_GC], 363 si->skipped_atomic_files[BG_GC]); 364 seq_printf(s, "BG skip : IO: %u, Other: %u\n", 365 si->io_skip_bggc, si->other_skip_bggc); 366 seq_puts(s, "\nExtent Cache:\n"); 367 seq_printf(s, " - Hit Count: L1-1:%llu L1-2:%llu L2:%llu\n", 368 si->hit_largest, si->hit_cached, 369 si->hit_rbtree); 370 seq_printf(s, " - Hit Ratio: %llu%% (%llu / %llu)\n", 371 !si->total_ext ? 0 : 372 div64_u64(si->hit_total * 100, si->total_ext), 373 si->hit_total, si->total_ext); 374 seq_printf(s, " - Inner Struct Count: tree: %d(%d), node: %d\n", 375 si->ext_tree, si->zombie_tree, si->ext_node); 376 seq_puts(s, "\nBalancing F2FS Async:\n"); 377 seq_printf(s, " - IO_R (Data: %4d, Node: %4d, Meta: %4d\n", 378 si->nr_rd_data, si->nr_rd_node, si->nr_rd_meta); 379 seq_printf(s, " - IO_W (CP: %4d, Data: %4d, Flush: (%4d %4d %4d), " 380 "Discard: (%4d %4d)) cmd: %4d undiscard:%4u\n", 381 si->nr_wb_cp_data, si->nr_wb_data, 382 si->nr_flushing, si->nr_flushed, 383 si->flush_list_empty, 384 si->nr_discarding, si->nr_discarded, 385 si->nr_discard_cmd, si->undiscard_blks); 386 seq_printf(s, " - inmem: %4d, atomic IO: %4d (Max. %4d), " 387 "volatile IO: %4d (Max. %4d)\n", 388 si->inmem_pages, si->aw_cnt, si->max_aw_cnt, 389 si->vw_cnt, si->max_vw_cnt); 390 seq_printf(s, " - nodes: %4d in %4d\n", 391 si->ndirty_node, si->node_pages); 392 seq_printf(s, " - dents: %4d in dirs:%4d (%4d)\n", 393 si->ndirty_dent, si->ndirty_dirs, si->ndirty_all); 394 seq_printf(s, " - datas: %4d in files:%4d\n", 395 si->ndirty_data, si->ndirty_files); 396 seq_printf(s, " - quota datas: %4d in quota files:%4d\n", 397 si->ndirty_qdata, si->nquota_files); 398 seq_printf(s, " - meta: %4d in %4d\n", 399 si->ndirty_meta, si->meta_pages); 400 seq_printf(s, " - imeta: %4d\n", 401 si->ndirty_imeta); 402 seq_printf(s, " - NATs: %9d/%9d\n - SITs: %9d/%9d\n", 403 si->dirty_nats, si->nats, si->dirty_sits, si->sits); 404 seq_printf(s, " - free_nids: %9d/%9d\n - alloc_nids: %9d\n", 405 si->free_nids, si->avail_nids, si->alloc_nids); 406 seq_puts(s, "\nDistribution of User Blocks:"); 407 seq_puts(s, " [ valid | invalid | free ]\n"); 408 seq_puts(s, " ["); 409 410 for (j = 0; j < si->util_valid; j++) 411 seq_putc(s, '-'); 412 seq_putc(s, '|'); 413 414 for (j = 0; j < si->util_invalid; j++) 415 seq_putc(s, '-'); 416 seq_putc(s, '|'); 417 418 for (j = 0; j < si->util_free; j++) 419 seq_putc(s, '-'); 420 seq_puts(s, "]\n\n"); 421 seq_printf(s, "IPU: %u blocks\n", si->inplace_count); 422 seq_printf(s, "SSR: %u blocks in %u segments\n", 423 si->block_count[SSR], si->segment_count[SSR]); 424 seq_printf(s, "LFS: %u blocks in %u segments\n", 425 si->block_count[LFS], si->segment_count[LFS]); 426 427 /* segment usage info */ 428 update_sit_info(si->sbi); 429 seq_printf(s, "\nBDF: %u, avg. vblocks: %u\n", 430 si->bimodal, si->avg_vblocks); 431 432 /* memory footprint */ 433 update_mem_info(si->sbi); 434 seq_printf(s, "\nMemory: %llu KB\n", 435 (si->base_mem + si->cache_mem + si->page_mem) >> 10); 436 seq_printf(s, " - static: %llu KB\n", 437 si->base_mem >> 10); 438 seq_printf(s, " - cached: %llu KB\n", 439 si->cache_mem >> 10); 440 seq_printf(s, " - paged : %llu KB\n", 441 si->page_mem >> 10); 442 } 443 mutex_unlock(&f2fs_stat_mutex); 444 return 0; 445 } 446 447 static int stat_open(struct inode *inode, struct file *file) 448 { 449 return single_open(file, stat_show, inode->i_private); 450 } 451 452 static const struct file_operations stat_fops = { 453 .owner = THIS_MODULE, 454 .open = stat_open, 455 .read = seq_read, 456 .llseek = seq_lseek, 457 .release = single_release, 458 }; 459 460 int f2fs_build_stats(struct f2fs_sb_info *sbi) 461 { 462 struct f2fs_super_block *raw_super = F2FS_RAW_SUPER(sbi); 463 struct f2fs_stat_info *si; 464 int i; 465 466 si = f2fs_kzalloc(sbi, sizeof(struct f2fs_stat_info), GFP_KERNEL); 467 if (!si) 468 return -ENOMEM; 469 470 si->all_area_segs = le32_to_cpu(raw_super->segment_count); 471 si->sit_area_segs = le32_to_cpu(raw_super->segment_count_sit); 472 si->nat_area_segs = le32_to_cpu(raw_super->segment_count_nat); 473 si->ssa_area_segs = le32_to_cpu(raw_super->segment_count_ssa); 474 si->main_area_segs = le32_to_cpu(raw_super->segment_count_main); 475 si->main_area_sections = le32_to_cpu(raw_super->section_count); 476 si->main_area_zones = si->main_area_sections / 477 le32_to_cpu(raw_super->secs_per_zone); 478 si->sbi = sbi; 479 sbi->stat_info = si; 480 481 atomic64_set(&sbi->total_hit_ext, 0); 482 atomic64_set(&sbi->read_hit_rbtree, 0); 483 atomic64_set(&sbi->read_hit_largest, 0); 484 atomic64_set(&sbi->read_hit_cached, 0); 485 486 atomic_set(&sbi->inline_xattr, 0); 487 atomic_set(&sbi->inline_inode, 0); 488 atomic_set(&sbi->inline_dir, 0); 489 atomic_set(&sbi->inplace_count, 0); 490 for (i = META_CP; i < META_MAX; i++) 491 atomic_set(&sbi->meta_count[i], 0); 492 493 atomic_set(&sbi->aw_cnt, 0); 494 atomic_set(&sbi->vw_cnt, 0); 495 atomic_set(&sbi->max_aw_cnt, 0); 496 atomic_set(&sbi->max_vw_cnt, 0); 497 498 mutex_lock(&f2fs_stat_mutex); 499 list_add_tail(&si->stat_list, &f2fs_stat_list); 500 mutex_unlock(&f2fs_stat_mutex); 501 502 return 0; 503 } 504 505 void f2fs_destroy_stats(struct f2fs_sb_info *sbi) 506 { 507 struct f2fs_stat_info *si = F2FS_STAT(sbi); 508 509 mutex_lock(&f2fs_stat_mutex); 510 list_del(&si->stat_list); 511 mutex_unlock(&f2fs_stat_mutex); 512 513 kfree(si); 514 } 515 516 int __init f2fs_create_root_stats(void) 517 { 518 struct dentry *file; 519 520 f2fs_debugfs_root = debugfs_create_dir("f2fs", NULL); 521 if (!f2fs_debugfs_root) 522 return -ENOMEM; 523 524 file = debugfs_create_file("status", S_IRUGO, f2fs_debugfs_root, 525 NULL, &stat_fops); 526 if (!file) { 527 debugfs_remove(f2fs_debugfs_root); 528 f2fs_debugfs_root = NULL; 529 return -ENOMEM; 530 } 531 532 return 0; 533 } 534 535 void f2fs_destroy_root_stats(void) 536 { 537 if (!f2fs_debugfs_root) 538 return; 539 540 debugfs_remove_recursive(f2fs_debugfs_root); 541 f2fs_debugfs_root = NULL; 542 } 543