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 struct f2fs_super_block *raw_super = F2FS_RAW_SUPER(sbi); 31 int i; 32 33 /* these will be changed if online resize is done */ 34 si->main_area_segs = le32_to_cpu(raw_super->segment_count_main); 35 si->main_area_sections = le32_to_cpu(raw_super->section_count); 36 si->main_area_zones = si->main_area_sections / 37 le32_to_cpu(raw_super->secs_per_zone); 38 39 /* validation check of the segment numbers */ 40 si->hit_largest = atomic64_read(&sbi->read_hit_largest); 41 si->hit_cached = atomic64_read(&sbi->read_hit_cached); 42 si->hit_rbtree = atomic64_read(&sbi->read_hit_rbtree); 43 si->hit_total = si->hit_largest + si->hit_cached + si->hit_rbtree; 44 si->total_ext = atomic64_read(&sbi->total_hit_ext); 45 si->ext_tree = atomic_read(&sbi->total_ext_tree); 46 si->zombie_tree = atomic_read(&sbi->total_zombie_tree); 47 si->ext_node = atomic_read(&sbi->total_ext_node); 48 si->ndirty_node = get_pages(sbi, F2FS_DIRTY_NODES); 49 si->ndirty_dent = get_pages(sbi, F2FS_DIRTY_DENTS); 50 si->ndirty_meta = get_pages(sbi, F2FS_DIRTY_META); 51 si->ndirty_data = get_pages(sbi, F2FS_DIRTY_DATA); 52 si->ndirty_qdata = get_pages(sbi, F2FS_DIRTY_QDATA); 53 si->ndirty_imeta = get_pages(sbi, F2FS_DIRTY_IMETA); 54 si->ndirty_dirs = sbi->ndirty_inode[DIR_INODE]; 55 si->ndirty_files = sbi->ndirty_inode[FILE_INODE]; 56 si->nquota_files = sbi->nquota_files; 57 si->ndirty_all = sbi->ndirty_inode[DIRTY_META]; 58 si->inmem_pages = get_pages(sbi, F2FS_INMEM_PAGES); 59 si->aw_cnt = atomic_read(&sbi->aw_cnt); 60 si->vw_cnt = atomic_read(&sbi->vw_cnt); 61 si->max_aw_cnt = atomic_read(&sbi->max_aw_cnt); 62 si->max_vw_cnt = atomic_read(&sbi->max_vw_cnt); 63 si->nr_dio_read = get_pages(sbi, F2FS_DIO_READ); 64 si->nr_dio_write = get_pages(sbi, F2FS_DIO_WRITE); 65 si->nr_wb_cp_data = get_pages(sbi, F2FS_WB_CP_DATA); 66 si->nr_wb_data = get_pages(sbi, F2FS_WB_DATA); 67 si->nr_rd_data = get_pages(sbi, F2FS_RD_DATA); 68 si->nr_rd_node = get_pages(sbi, F2FS_RD_NODE); 69 si->nr_rd_meta = get_pages(sbi, F2FS_RD_META); 70 if (SM_I(sbi)->fcc_info) { 71 si->nr_flushed = 72 atomic_read(&SM_I(sbi)->fcc_info->issued_flush); 73 si->nr_flushing = 74 atomic_read(&SM_I(sbi)->fcc_info->queued_flush); 75 si->flush_list_empty = 76 llist_empty(&SM_I(sbi)->fcc_info->issue_list); 77 } 78 if (SM_I(sbi)->dcc_info) { 79 si->nr_discarded = 80 atomic_read(&SM_I(sbi)->dcc_info->issued_discard); 81 si->nr_discarding = 82 atomic_read(&SM_I(sbi)->dcc_info->queued_discard); 83 si->nr_discard_cmd = 84 atomic_read(&SM_I(sbi)->dcc_info->discard_cmd_cnt); 85 si->undiscard_blks = SM_I(sbi)->dcc_info->undiscard_blks; 86 } 87 si->total_count = (int)sbi->user_block_count / sbi->blocks_per_seg; 88 si->rsvd_segs = reserved_segments(sbi); 89 si->overp_segs = overprovision_segments(sbi); 90 si->valid_count = valid_user_blocks(sbi); 91 si->discard_blks = discard_blocks(sbi); 92 si->valid_node_count = valid_node_count(sbi); 93 si->valid_inode_count = valid_inode_count(sbi); 94 si->inline_xattr = atomic_read(&sbi->inline_xattr); 95 si->inline_inode = atomic_read(&sbi->inline_inode); 96 si->inline_dir = atomic_read(&sbi->inline_dir); 97 si->append = sbi->im[APPEND_INO].ino_num; 98 si->update = sbi->im[UPDATE_INO].ino_num; 99 si->orphans = sbi->im[ORPHAN_INO].ino_num; 100 si->utilization = utilization(sbi); 101 102 si->free_segs = free_segments(sbi); 103 si->free_secs = free_sections(sbi); 104 si->prefree_count = prefree_segments(sbi); 105 si->dirty_count = dirty_segments(sbi); 106 if (sbi->node_inode) 107 si->node_pages = NODE_MAPPING(sbi)->nrpages; 108 if (sbi->meta_inode) 109 si->meta_pages = META_MAPPING(sbi)->nrpages; 110 si->nats = NM_I(sbi)->nat_cnt; 111 si->dirty_nats = NM_I(sbi)->dirty_nat_cnt; 112 si->sits = MAIN_SEGS(sbi); 113 si->dirty_sits = SIT_I(sbi)->dirty_sentries; 114 si->free_nids = NM_I(sbi)->nid_cnt[FREE_NID]; 115 si->avail_nids = NM_I(sbi)->available_nids; 116 si->alloc_nids = NM_I(sbi)->nid_cnt[PREALLOC_NID]; 117 si->bg_gc = sbi->bg_gc; 118 si->io_skip_bggc = sbi->io_skip_bggc; 119 si->other_skip_bggc = sbi->other_skip_bggc; 120 si->skipped_atomic_files[BG_GC] = sbi->skipped_atomic_files[BG_GC]; 121 si->skipped_atomic_files[FG_GC] = sbi->skipped_atomic_files[FG_GC]; 122 si->util_free = (int)(free_user_blocks(sbi) >> sbi->log_blocks_per_seg) 123 * 100 / (int)(sbi->user_block_count >> sbi->log_blocks_per_seg) 124 / 2; 125 si->util_valid = (int)(written_block_count(sbi) >> 126 sbi->log_blocks_per_seg) 127 * 100 / (int)(sbi->user_block_count >> sbi->log_blocks_per_seg) 128 / 2; 129 si->util_invalid = 50 - si->util_free - si->util_valid; 130 for (i = CURSEG_HOT_DATA; i <= CURSEG_COLD_NODE; i++) { 131 struct curseg_info *curseg = CURSEG_I(sbi, i); 132 si->curseg[i] = curseg->segno; 133 si->cursec[i] = GET_SEC_FROM_SEG(sbi, curseg->segno); 134 si->curzone[i] = GET_ZONE_FROM_SEC(sbi, si->cursec[i]); 135 } 136 137 for (i = META_CP; i < META_MAX; i++) 138 si->meta_count[i] = atomic_read(&sbi->meta_count[i]); 139 140 for (i = 0; i < 2; i++) { 141 si->segment_count[i] = sbi->segment_count[i]; 142 si->block_count[i] = sbi->block_count[i]; 143 } 144 145 si->inplace_count = atomic_read(&sbi->inplace_count); 146 } 147 148 /* 149 * This function calculates BDF of every segments 150 */ 151 static void update_sit_info(struct f2fs_sb_info *sbi) 152 { 153 struct f2fs_stat_info *si = F2FS_STAT(sbi); 154 unsigned long long blks_per_sec, hblks_per_sec, total_vblocks; 155 unsigned long long bimodal, dist; 156 unsigned int segno, vblocks; 157 int ndirty = 0; 158 159 bimodal = 0; 160 total_vblocks = 0; 161 blks_per_sec = BLKS_PER_SEC(sbi); 162 hblks_per_sec = blks_per_sec / 2; 163 for (segno = 0; segno < MAIN_SEGS(sbi); segno += sbi->segs_per_sec) { 164 vblocks = get_valid_blocks(sbi, segno, true); 165 dist = abs(vblocks - hblks_per_sec); 166 bimodal += dist * dist; 167 168 if (vblocks > 0 && vblocks < blks_per_sec) { 169 total_vblocks += vblocks; 170 ndirty++; 171 } 172 } 173 dist = div_u64(MAIN_SECS(sbi) * hblks_per_sec * hblks_per_sec, 100); 174 si->bimodal = div64_u64(bimodal, dist); 175 if (si->dirty_count) 176 si->avg_vblocks = div_u64(total_vblocks, ndirty); 177 else 178 si->avg_vblocks = 0; 179 } 180 181 /* 182 * This function calculates memory footprint. 183 */ 184 static void update_mem_info(struct f2fs_sb_info *sbi) 185 { 186 struct f2fs_stat_info *si = F2FS_STAT(sbi); 187 int i; 188 189 if (si->base_mem) 190 goto get_cache; 191 192 /* build stat */ 193 si->base_mem = sizeof(struct f2fs_stat_info); 194 195 /* build superblock */ 196 si->base_mem += sizeof(struct f2fs_sb_info) + sbi->sb->s_blocksize; 197 si->base_mem += 2 * sizeof(struct f2fs_inode_info); 198 si->base_mem += sizeof(*sbi->ckpt); 199 200 /* build sm */ 201 si->base_mem += sizeof(struct f2fs_sm_info); 202 203 /* build sit */ 204 si->base_mem += sizeof(struct sit_info); 205 si->base_mem += MAIN_SEGS(sbi) * sizeof(struct seg_entry); 206 si->base_mem += f2fs_bitmap_size(MAIN_SEGS(sbi)); 207 si->base_mem += 2 * SIT_VBLOCK_MAP_SIZE * MAIN_SEGS(sbi); 208 si->base_mem += SIT_VBLOCK_MAP_SIZE * MAIN_SEGS(sbi); 209 si->base_mem += SIT_VBLOCK_MAP_SIZE; 210 if (__is_large_section(sbi)) 211 si->base_mem += MAIN_SECS(sbi) * sizeof(struct sec_entry); 212 si->base_mem += __bitmap_size(sbi, SIT_BITMAP); 213 214 /* build free segmap */ 215 si->base_mem += sizeof(struct free_segmap_info); 216 si->base_mem += f2fs_bitmap_size(MAIN_SEGS(sbi)); 217 si->base_mem += f2fs_bitmap_size(MAIN_SECS(sbi)); 218 219 /* build curseg */ 220 si->base_mem += sizeof(struct curseg_info) * NR_CURSEG_TYPE; 221 si->base_mem += PAGE_SIZE * NR_CURSEG_TYPE; 222 223 /* build dirty segmap */ 224 si->base_mem += sizeof(struct dirty_seglist_info); 225 si->base_mem += NR_DIRTY_TYPE * f2fs_bitmap_size(MAIN_SEGS(sbi)); 226 si->base_mem += f2fs_bitmap_size(MAIN_SECS(sbi)); 227 228 /* build nm */ 229 si->base_mem += sizeof(struct f2fs_nm_info); 230 si->base_mem += __bitmap_size(sbi, NAT_BITMAP); 231 si->base_mem += (NM_I(sbi)->nat_bits_blocks << F2FS_BLKSIZE_BITS); 232 si->base_mem += NM_I(sbi)->nat_blocks * 233 f2fs_bitmap_size(NAT_ENTRY_PER_BLOCK); 234 si->base_mem += NM_I(sbi)->nat_blocks / 8; 235 si->base_mem += NM_I(sbi)->nat_blocks * sizeof(unsigned short); 236 237 get_cache: 238 si->cache_mem = 0; 239 240 /* build gc */ 241 if (sbi->gc_thread) 242 si->cache_mem += sizeof(struct f2fs_gc_kthread); 243 244 /* build merge flush thread */ 245 if (SM_I(sbi)->fcc_info) 246 si->cache_mem += sizeof(struct flush_cmd_control); 247 if (SM_I(sbi)->dcc_info) { 248 si->cache_mem += sizeof(struct discard_cmd_control); 249 si->cache_mem += sizeof(struct discard_cmd) * 250 atomic_read(&SM_I(sbi)->dcc_info->discard_cmd_cnt); 251 } 252 253 /* free nids */ 254 si->cache_mem += (NM_I(sbi)->nid_cnt[FREE_NID] + 255 NM_I(sbi)->nid_cnt[PREALLOC_NID]) * 256 sizeof(struct free_nid); 257 si->cache_mem += NM_I(sbi)->nat_cnt * sizeof(struct nat_entry); 258 si->cache_mem += NM_I(sbi)->dirty_nat_cnt * 259 sizeof(struct nat_entry_set); 260 si->cache_mem += si->inmem_pages * sizeof(struct inmem_pages); 261 for (i = 0; i < MAX_INO_ENTRY; i++) 262 si->cache_mem += sbi->im[i].ino_num * sizeof(struct ino_entry); 263 si->cache_mem += atomic_read(&sbi->total_ext_tree) * 264 sizeof(struct extent_tree); 265 si->cache_mem += atomic_read(&sbi->total_ext_node) * 266 sizeof(struct extent_node); 267 268 si->page_mem = 0; 269 if (sbi->node_inode) { 270 unsigned npages = NODE_MAPPING(sbi)->nrpages; 271 si->page_mem += (unsigned long long)npages << PAGE_SHIFT; 272 } 273 if (sbi->meta_inode) { 274 unsigned npages = META_MAPPING(sbi)->nrpages; 275 si->page_mem += (unsigned long long)npages << PAGE_SHIFT; 276 } 277 } 278 279 static int stat_show(struct seq_file *s, void *v) 280 { 281 struct f2fs_stat_info *si; 282 int i = 0; 283 int j; 284 285 mutex_lock(&f2fs_stat_mutex); 286 list_for_each_entry(si, &f2fs_stat_list, stat_list) { 287 update_general_status(si->sbi); 288 289 seq_printf(s, "\n=====[ partition info(%pg). #%d, %s, CP: %s]=====\n", 290 si->sbi->sb->s_bdev, i++, 291 f2fs_readonly(si->sbi->sb) ? "RO": "RW", 292 is_set_ckpt_flags(si->sbi, CP_DISABLED_FLAG) ? 293 "Disabled": (f2fs_cp_error(si->sbi) ? "Error": "Good")); 294 seq_printf(s, "[SB: 1] [CP: 2] [SIT: %d] [NAT: %d] ", 295 si->sit_area_segs, si->nat_area_segs); 296 seq_printf(s, "[SSA: %d] [MAIN: %d", 297 si->ssa_area_segs, si->main_area_segs); 298 seq_printf(s, "(OverProv:%d Resv:%d)]\n\n", 299 si->overp_segs, si->rsvd_segs); 300 if (test_opt(si->sbi, DISCARD)) 301 seq_printf(s, "Utilization: %u%% (%u valid blocks, %u discard blocks)\n", 302 si->utilization, si->valid_count, si->discard_blks); 303 else 304 seq_printf(s, "Utilization: %u%% (%u valid blocks)\n", 305 si->utilization, si->valid_count); 306 307 seq_printf(s, " - Node: %u (Inode: %u, ", 308 si->valid_node_count, si->valid_inode_count); 309 seq_printf(s, "Other: %u)\n - Data: %u\n", 310 si->valid_node_count - si->valid_inode_count, 311 si->valid_count - si->valid_node_count); 312 seq_printf(s, " - Inline_xattr Inode: %u\n", 313 si->inline_xattr); 314 seq_printf(s, " - Inline_data Inode: %u\n", 315 si->inline_inode); 316 seq_printf(s, " - Inline_dentry Inode: %u\n", 317 si->inline_dir); 318 seq_printf(s, " - Orphan/Append/Update Inode: %u, %u, %u\n", 319 si->orphans, si->append, si->update); 320 seq_printf(s, "\nMain area: %d segs, %d secs %d zones\n", 321 si->main_area_segs, si->main_area_sections, 322 si->main_area_zones); 323 seq_printf(s, " - COLD data: %d, %d, %d\n", 324 si->curseg[CURSEG_COLD_DATA], 325 si->cursec[CURSEG_COLD_DATA], 326 si->curzone[CURSEG_COLD_DATA]); 327 seq_printf(s, " - WARM data: %d, %d, %d\n", 328 si->curseg[CURSEG_WARM_DATA], 329 si->cursec[CURSEG_WARM_DATA], 330 si->curzone[CURSEG_WARM_DATA]); 331 seq_printf(s, " - HOT data: %d, %d, %d\n", 332 si->curseg[CURSEG_HOT_DATA], 333 si->cursec[CURSEG_HOT_DATA], 334 si->curzone[CURSEG_HOT_DATA]); 335 seq_printf(s, " - Dir dnode: %d, %d, %d\n", 336 si->curseg[CURSEG_HOT_NODE], 337 si->cursec[CURSEG_HOT_NODE], 338 si->curzone[CURSEG_HOT_NODE]); 339 seq_printf(s, " - File dnode: %d, %d, %d\n", 340 si->curseg[CURSEG_WARM_NODE], 341 si->cursec[CURSEG_WARM_NODE], 342 si->curzone[CURSEG_WARM_NODE]); 343 seq_printf(s, " - Indir nodes: %d, %d, %d\n", 344 si->curseg[CURSEG_COLD_NODE], 345 si->cursec[CURSEG_COLD_NODE], 346 si->curzone[CURSEG_COLD_NODE]); 347 seq_printf(s, "\n - Valid: %d\n - Dirty: %d\n", 348 si->main_area_segs - si->dirty_count - 349 si->prefree_count - si->free_segs, 350 si->dirty_count); 351 seq_printf(s, " - Prefree: %d\n - Free: %d (%d)\n\n", 352 si->prefree_count, si->free_segs, si->free_secs); 353 seq_printf(s, "CP calls: %d (BG: %d)\n", 354 si->cp_count, si->bg_cp_count); 355 seq_printf(s, " - cp blocks : %u\n", si->meta_count[META_CP]); 356 seq_printf(s, " - sit blocks : %u\n", 357 si->meta_count[META_SIT]); 358 seq_printf(s, " - nat blocks : %u\n", 359 si->meta_count[META_NAT]); 360 seq_printf(s, " - ssa blocks : %u\n", 361 si->meta_count[META_SSA]); 362 seq_printf(s, "GC calls: %d (BG: %d)\n", 363 si->call_count, si->bg_gc); 364 seq_printf(s, " - data segments : %d (%d)\n", 365 si->data_segs, si->bg_data_segs); 366 seq_printf(s, " - node segments : %d (%d)\n", 367 si->node_segs, si->bg_node_segs); 368 seq_printf(s, "Try to move %d blocks (BG: %d)\n", si->tot_blks, 369 si->bg_data_blks + si->bg_node_blks); 370 seq_printf(s, " - data blocks : %d (%d)\n", si->data_blks, 371 si->bg_data_blks); 372 seq_printf(s, " - node blocks : %d (%d)\n", si->node_blks, 373 si->bg_node_blks); 374 seq_printf(s, "Skipped : atomic write %llu (%llu)\n", 375 si->skipped_atomic_files[BG_GC] + 376 si->skipped_atomic_files[FG_GC], 377 si->skipped_atomic_files[BG_GC]); 378 seq_printf(s, "BG skip : IO: %u, Other: %u\n", 379 si->io_skip_bggc, si->other_skip_bggc); 380 seq_puts(s, "\nExtent Cache:\n"); 381 seq_printf(s, " - Hit Count: L1-1:%llu L1-2:%llu L2:%llu\n", 382 si->hit_largest, si->hit_cached, 383 si->hit_rbtree); 384 seq_printf(s, " - Hit Ratio: %llu%% (%llu / %llu)\n", 385 !si->total_ext ? 0 : 386 div64_u64(si->hit_total * 100, si->total_ext), 387 si->hit_total, si->total_ext); 388 seq_printf(s, " - Inner Struct Count: tree: %d(%d), node: %d\n", 389 si->ext_tree, si->zombie_tree, si->ext_node); 390 seq_puts(s, "\nBalancing F2FS Async:\n"); 391 seq_printf(s, " - DIO (R: %4d, W: %4d)\n", 392 si->nr_dio_read, si->nr_dio_write); 393 seq_printf(s, " - IO_R (Data: %4d, Node: %4d, Meta: %4d\n", 394 si->nr_rd_data, si->nr_rd_node, si->nr_rd_meta); 395 seq_printf(s, " - IO_W (CP: %4d, Data: %4d, Flush: (%4d %4d %4d), " 396 "Discard: (%4d %4d)) cmd: %4d undiscard:%4u\n", 397 si->nr_wb_cp_data, si->nr_wb_data, 398 si->nr_flushing, si->nr_flushed, 399 si->flush_list_empty, 400 si->nr_discarding, si->nr_discarded, 401 si->nr_discard_cmd, si->undiscard_blks); 402 seq_printf(s, " - inmem: %4d, atomic IO: %4d (Max. %4d), " 403 "volatile IO: %4d (Max. %4d)\n", 404 si->inmem_pages, si->aw_cnt, si->max_aw_cnt, 405 si->vw_cnt, si->max_vw_cnt); 406 seq_printf(s, " - nodes: %4d in %4d\n", 407 si->ndirty_node, si->node_pages); 408 seq_printf(s, " - dents: %4d in dirs:%4d (%4d)\n", 409 si->ndirty_dent, si->ndirty_dirs, si->ndirty_all); 410 seq_printf(s, " - datas: %4d in files:%4d\n", 411 si->ndirty_data, si->ndirty_files); 412 seq_printf(s, " - quota datas: %4d in quota files:%4d\n", 413 si->ndirty_qdata, si->nquota_files); 414 seq_printf(s, " - meta: %4d in %4d\n", 415 si->ndirty_meta, si->meta_pages); 416 seq_printf(s, " - imeta: %4d\n", 417 si->ndirty_imeta); 418 seq_printf(s, " - NATs: %9d/%9d\n - SITs: %9d/%9d\n", 419 si->dirty_nats, si->nats, si->dirty_sits, si->sits); 420 seq_printf(s, " - free_nids: %9d/%9d\n - alloc_nids: %9d\n", 421 si->free_nids, si->avail_nids, si->alloc_nids); 422 seq_puts(s, "\nDistribution of User Blocks:"); 423 seq_puts(s, " [ valid | invalid | free ]\n"); 424 seq_puts(s, " ["); 425 426 for (j = 0; j < si->util_valid; j++) 427 seq_putc(s, '-'); 428 seq_putc(s, '|'); 429 430 for (j = 0; j < si->util_invalid; j++) 431 seq_putc(s, '-'); 432 seq_putc(s, '|'); 433 434 for (j = 0; j < si->util_free; j++) 435 seq_putc(s, '-'); 436 seq_puts(s, "]\n\n"); 437 seq_printf(s, "IPU: %u blocks\n", si->inplace_count); 438 seq_printf(s, "SSR: %u blocks in %u segments\n", 439 si->block_count[SSR], si->segment_count[SSR]); 440 seq_printf(s, "LFS: %u blocks in %u segments\n", 441 si->block_count[LFS], si->segment_count[LFS]); 442 443 /* segment usage info */ 444 update_sit_info(si->sbi); 445 seq_printf(s, "\nBDF: %u, avg. vblocks: %u\n", 446 si->bimodal, si->avg_vblocks); 447 448 /* memory footprint */ 449 update_mem_info(si->sbi); 450 seq_printf(s, "\nMemory: %llu KB\n", 451 (si->base_mem + si->cache_mem + si->page_mem) >> 10); 452 seq_printf(s, " - static: %llu KB\n", 453 si->base_mem >> 10); 454 seq_printf(s, " - cached: %llu KB\n", 455 si->cache_mem >> 10); 456 seq_printf(s, " - paged : %llu KB\n", 457 si->page_mem >> 10); 458 } 459 mutex_unlock(&f2fs_stat_mutex); 460 return 0; 461 } 462 463 DEFINE_SHOW_ATTRIBUTE(stat); 464 465 int f2fs_build_stats(struct f2fs_sb_info *sbi) 466 { 467 struct f2fs_super_block *raw_super = F2FS_RAW_SUPER(sbi); 468 struct f2fs_stat_info *si; 469 int i; 470 471 si = f2fs_kzalloc(sbi, sizeof(struct f2fs_stat_info), GFP_KERNEL); 472 if (!si) 473 return -ENOMEM; 474 475 si->all_area_segs = le32_to_cpu(raw_super->segment_count); 476 si->sit_area_segs = le32_to_cpu(raw_super->segment_count_sit); 477 si->nat_area_segs = le32_to_cpu(raw_super->segment_count_nat); 478 si->ssa_area_segs = le32_to_cpu(raw_super->segment_count_ssa); 479 si->main_area_segs = le32_to_cpu(raw_super->segment_count_main); 480 si->main_area_sections = le32_to_cpu(raw_super->section_count); 481 si->main_area_zones = si->main_area_sections / 482 le32_to_cpu(raw_super->secs_per_zone); 483 si->sbi = sbi; 484 sbi->stat_info = si; 485 486 atomic64_set(&sbi->total_hit_ext, 0); 487 atomic64_set(&sbi->read_hit_rbtree, 0); 488 atomic64_set(&sbi->read_hit_largest, 0); 489 atomic64_set(&sbi->read_hit_cached, 0); 490 491 atomic_set(&sbi->inline_xattr, 0); 492 atomic_set(&sbi->inline_inode, 0); 493 atomic_set(&sbi->inline_dir, 0); 494 atomic_set(&sbi->inplace_count, 0); 495 for (i = META_CP; i < META_MAX; i++) 496 atomic_set(&sbi->meta_count[i], 0); 497 498 atomic_set(&sbi->aw_cnt, 0); 499 atomic_set(&sbi->vw_cnt, 0); 500 atomic_set(&sbi->max_aw_cnt, 0); 501 atomic_set(&sbi->max_vw_cnt, 0); 502 503 mutex_lock(&f2fs_stat_mutex); 504 list_add_tail(&si->stat_list, &f2fs_stat_list); 505 mutex_unlock(&f2fs_stat_mutex); 506 507 return 0; 508 } 509 510 void f2fs_destroy_stats(struct f2fs_sb_info *sbi) 511 { 512 struct f2fs_stat_info *si = F2FS_STAT(sbi); 513 514 mutex_lock(&f2fs_stat_mutex); 515 list_del(&si->stat_list); 516 mutex_unlock(&f2fs_stat_mutex); 517 518 kvfree(si); 519 } 520 521 void __init f2fs_create_root_stats(void) 522 { 523 f2fs_debugfs_root = debugfs_create_dir("f2fs", NULL); 524 525 debugfs_create_file("status", S_IRUGO, f2fs_debugfs_root, NULL, 526 &stat_fops); 527 } 528 529 void f2fs_destroy_root_stats(void) 530 { 531 debugfs_remove_recursive(f2fs_debugfs_root); 532 f2fs_debugfs_root = NULL; 533 } 534