Commit | Line | Data |
---|---|---|
0a8165d7 | 1 | /* |
902829aa GKH |
2 | * f2fs debugging statistics |
3 | * | |
4 | * Copyright (c) 2012 Samsung Electronics Co., Ltd. | |
5 | * http://www.samsung.com/ | |
6 | * Copyright (c) 2012 Linux Foundation | |
7 | * Copyright (c) 2012 Greg Kroah-Hartman <gregkh@linuxfoundation.org> | |
8 | * | |
9 | * This program is free software; you can redistribute it and/or modify | |
10 | * it under the terms of the GNU General Public License version 2 as | |
11 | * published by the Free Software Foundation. | |
12 | */ | |
13 | ||
14 | #include <linux/fs.h> | |
15 | #include <linux/backing-dev.h> | |
902829aa GKH |
16 | #include <linux/f2fs_fs.h> |
17 | #include <linux/blkdev.h> | |
18 | #include <linux/debugfs.h> | |
19 | #include <linux/seq_file.h> | |
20 | ||
21 | #include "f2fs.h" | |
22 | #include "node.h" | |
23 | #include "segment.h" | |
24 | #include "gc.h" | |
25 | ||
26 | static LIST_HEAD(f2fs_stat_list); | |
40e1ebe9 | 27 | static struct dentry *f2fs_debugfs_root; |
66af62ce | 28 | static DEFINE_MUTEX(f2fs_stat_mutex); |
902829aa | 29 | |
25ca923b | 30 | static void update_general_status(struct f2fs_sb_info *sbi) |
902829aa | 31 | { |
963d4f7d | 32 | struct f2fs_stat_info *si = F2FS_STAT(sbi); |
902829aa GKH |
33 | int i; |
34 | ||
e1c42045 | 35 | /* validation check of the segment numbers */ |
902829aa GKH |
36 | si->hit_ext = sbi->read_hit_ext; |
37 | si->total_ext = sbi->total_hit_ext; | |
4bf6fd9f CY |
38 | si->ext_tree = sbi->total_ext_tree; |
39 | si->ext_node = atomic_read(&sbi->total_ext_node); | |
902829aa GKH |
40 | si->ndirty_node = get_pages(sbi, F2FS_DIRTY_NODES); |
41 | si->ndirty_dent = get_pages(sbi, F2FS_DIRTY_DENTS); | |
42 | si->ndirty_dirs = sbi->n_dirty_dirs; | |
43 | si->ndirty_meta = get_pages(sbi, F2FS_DIRTY_META); | |
8dcf2ff7 | 44 | si->inmem_pages = get_pages(sbi, F2FS_INMEM_PAGES); |
d24bdcbf | 45 | si->wb_pages = get_pages(sbi, F2FS_WRITEBACK); |
902829aa GKH |
46 | si->total_count = (int)sbi->user_block_count / sbi->blocks_per_seg; |
47 | si->rsvd_segs = reserved_segments(sbi); | |
48 | si->overp_segs = overprovision_segments(sbi); | |
49 | si->valid_count = valid_user_blocks(sbi); | |
50 | si->valid_node_count = valid_node_count(sbi); | |
51 | si->valid_inode_count = valid_inode_count(sbi); | |
03e14d52 CY |
52 | si->inline_inode = atomic_read(&sbi->inline_inode); |
53 | si->inline_dir = atomic_read(&sbi->inline_dir); | |
902829aa GKH |
54 | si->utilization = utilization(sbi); |
55 | ||
56 | si->free_segs = free_segments(sbi); | |
57 | si->free_secs = free_sections(sbi); | |
58 | si->prefree_count = prefree_segments(sbi); | |
59 | si->dirty_count = dirty_segments(sbi); | |
4ef51a8f | 60 | si->node_pages = NODE_MAPPING(sbi)->nrpages; |
9df27d98 | 61 | si->meta_pages = META_MAPPING(sbi)->nrpages; |
902829aa | 62 | si->nats = NM_I(sbi)->nat_cnt; |
dd4e4b59 JK |
63 | si->dirty_nats = NM_I(sbi)->dirty_nat_cnt; |
64 | si->sits = MAIN_SEGS(sbi); | |
65 | si->dirty_sits = SIT_I(sbi)->dirty_sentries; | |
902829aa GKH |
66 | si->fnids = NM_I(sbi)->fcnt; |
67 | si->bg_gc = sbi->bg_gc; | |
68 | si->util_free = (int)(free_user_blocks(sbi) >> sbi->log_blocks_per_seg) | |
69 | * 100 / (int)(sbi->user_block_count >> sbi->log_blocks_per_seg) | |
70 | / 2; | |
71 | si->util_valid = (int)(written_block_count(sbi) >> | |
72 | sbi->log_blocks_per_seg) | |
73 | * 100 / (int)(sbi->user_block_count >> sbi->log_blocks_per_seg) | |
74 | / 2; | |
75 | si->util_invalid = 50 - si->util_free - si->util_valid; | |
76 | for (i = CURSEG_HOT_DATA; i <= CURSEG_COLD_NODE; i++) { | |
77 | struct curseg_info *curseg = CURSEG_I(sbi, i); | |
78 | si->curseg[i] = curseg->segno; | |
79 | si->cursec[i] = curseg->segno / sbi->segs_per_sec; | |
80 | si->curzone[i] = si->cursec[i] / sbi->secs_per_zone; | |
81 | } | |
82 | ||
83 | for (i = 0; i < 2; i++) { | |
84 | si->segment_count[i] = sbi->segment_count[i]; | |
85 | si->block_count[i] = sbi->block_count[i]; | |
86 | } | |
b9a2c252 CL |
87 | |
88 | si->inplace_count = atomic_read(&sbi->inplace_count); | |
902829aa GKH |
89 | } |
90 | ||
0a8165d7 | 91 | /* |
902829aa GKH |
92 | * This function calculates BDF of every segments |
93 | */ | |
94 | static void update_sit_info(struct f2fs_sb_info *sbi) | |
95 | { | |
963d4f7d | 96 | struct f2fs_stat_info *si = F2FS_STAT(sbi); |
902829aa | 97 | unsigned int blks_per_sec, hblks_per_sec, total_vblocks, bimodal, dist; |
902829aa GKH |
98 | unsigned int segno, vblocks; |
99 | int ndirty = 0; | |
100 | ||
101 | bimodal = 0; | |
102 | total_vblocks = 0; | |
103 | blks_per_sec = sbi->segs_per_sec * (1 << sbi->log_blocks_per_seg); | |
104 | hblks_per_sec = blks_per_sec / 2; | |
7cd8558b | 105 | for (segno = 0; segno < MAIN_SEGS(sbi); segno += sbi->segs_per_sec) { |
902829aa GKH |
106 | vblocks = get_valid_blocks(sbi, segno, sbi->segs_per_sec); |
107 | dist = abs(vblocks - hblks_per_sec); | |
108 | bimodal += dist * dist; | |
109 | ||
110 | if (vblocks > 0 && vblocks < blks_per_sec) { | |
111 | total_vblocks += vblocks; | |
112 | ndirty++; | |
113 | } | |
114 | } | |
7cd8558b | 115 | dist = MAIN_SECS(sbi) * hblks_per_sec * hblks_per_sec / 100; |
902829aa GKH |
116 | si->bimodal = bimodal / dist; |
117 | if (si->dirty_count) | |
118 | si->avg_vblocks = total_vblocks / ndirty; | |
119 | else | |
120 | si->avg_vblocks = 0; | |
121 | } | |
122 | ||
0a8165d7 | 123 | /* |
902829aa GKH |
124 | * This function calculates memory footprint. |
125 | */ | |
126 | static void update_mem_info(struct f2fs_sb_info *sbi) | |
127 | { | |
963d4f7d | 128 | struct f2fs_stat_info *si = F2FS_STAT(sbi); |
902829aa | 129 | unsigned npages; |
8c402946 | 130 | int i; |
902829aa GKH |
131 | |
132 | if (si->base_mem) | |
133 | goto get_cache; | |
134 | ||
135 | si->base_mem = sizeof(struct f2fs_sb_info) + sbi->sb->s_blocksize; | |
136 | si->base_mem += 2 * sizeof(struct f2fs_inode_info); | |
137 | si->base_mem += sizeof(*sbi->ckpt); | |
138 | ||
139 | /* build sm */ | |
140 | si->base_mem += sizeof(struct f2fs_sm_info); | |
141 | ||
142 | /* build sit */ | |
143 | si->base_mem += sizeof(struct sit_info); | |
7cd8558b JK |
144 | si->base_mem += MAIN_SEGS(sbi) * sizeof(struct seg_entry); |
145 | si->base_mem += f2fs_bitmap_size(MAIN_SEGS(sbi)); | |
146 | si->base_mem += 2 * SIT_VBLOCK_MAP_SIZE * MAIN_SEGS(sbi); | |
60a3b782 | 147 | si->base_mem += SIT_VBLOCK_MAP_SIZE; |
902829aa | 148 | if (sbi->segs_per_sec > 1) |
7cd8558b | 149 | si->base_mem += MAIN_SECS(sbi) * sizeof(struct sec_entry); |
902829aa GKH |
150 | si->base_mem += __bitmap_size(sbi, SIT_BITMAP); |
151 | ||
152 | /* build free segmap */ | |
153 | si->base_mem += sizeof(struct free_segmap_info); | |
7cd8558b JK |
154 | si->base_mem += f2fs_bitmap_size(MAIN_SEGS(sbi)); |
155 | si->base_mem += f2fs_bitmap_size(MAIN_SECS(sbi)); | |
902829aa GKH |
156 | |
157 | /* build curseg */ | |
158 | si->base_mem += sizeof(struct curseg_info) * NR_CURSEG_TYPE; | |
159 | si->base_mem += PAGE_CACHE_SIZE * NR_CURSEG_TYPE; | |
160 | ||
161 | /* build dirty segmap */ | |
162 | si->base_mem += sizeof(struct dirty_seglist_info); | |
7cd8558b JK |
163 | si->base_mem += NR_DIRTY_TYPE * f2fs_bitmap_size(MAIN_SEGS(sbi)); |
164 | si->base_mem += f2fs_bitmap_size(MAIN_SECS(sbi)); | |
902829aa | 165 | |
e1c42045 | 166 | /* build nm */ |
902829aa GKH |
167 | si->base_mem += sizeof(struct f2fs_nm_info); |
168 | si->base_mem += __bitmap_size(sbi, NAT_BITMAP); | |
169 | ||
9066c6a7 CY |
170 | get_cache: |
171 | si->cache_mem = 0; | |
172 | ||
902829aa | 173 | /* build gc */ |
9066c6a7 CY |
174 | if (sbi->gc_thread) |
175 | si->cache_mem += sizeof(struct f2fs_gc_kthread); | |
176 | ||
177 | /* build merge flush thread */ | |
178 | if (SM_I(sbi)->cmd_control_info) | |
179 | si->cache_mem += sizeof(struct flush_cmd_control); | |
902829aa | 180 | |
902829aa | 181 | /* free nids */ |
9066c6a7 CY |
182 | si->cache_mem += NM_I(sbi)->fcnt * sizeof(struct free_nid); |
183 | si->cache_mem += NM_I(sbi)->nat_cnt * sizeof(struct nat_entry); | |
6f0aacbc JK |
184 | si->cache_mem += NM_I(sbi)->dirty_nat_cnt * |
185 | sizeof(struct nat_entry_set); | |
186 | si->cache_mem += si->inmem_pages * sizeof(struct inmem_pages); | |
06292073 | 187 | si->cache_mem += sbi->n_dirty_dirs * sizeof(struct inode_entry); |
8c402946 | 188 | for (i = 0; i <= UPDATE_INO; i++) |
67298804 | 189 | si->cache_mem += sbi->im[i].ino_num * sizeof(struct ino_entry); |
4bf6fd9f CY |
190 | si->cache_mem += sbi->total_ext_tree * sizeof(struct extent_tree); |
191 | si->cache_mem += atomic_read(&sbi->total_ext_node) * | |
192 | sizeof(struct extent_node); | |
6f0aacbc JK |
193 | |
194 | si->page_mem = 0; | |
195 | npages = NODE_MAPPING(sbi)->nrpages; | |
196 | si->page_mem += npages << PAGE_CACHE_SHIFT; | |
197 | npages = META_MAPPING(sbi)->nrpages; | |
198 | si->page_mem += npages << PAGE_CACHE_SHIFT; | |
902829aa GKH |
199 | } |
200 | ||
201 | static int stat_show(struct seq_file *s, void *v) | |
202 | { | |
145b04e5 | 203 | struct f2fs_stat_info *si; |
902829aa GKH |
204 | int i = 0; |
205 | int j; | |
206 | ||
66af62ce | 207 | mutex_lock(&f2fs_stat_mutex); |
145b04e5 | 208 | list_for_each_entry(si, &f2fs_stat_list, stat_list) { |
f83759e2 | 209 | char devname[BDEVNAME_SIZE]; |
902829aa | 210 | |
902829aa GKH |
211 | update_general_status(si->sbi); |
212 | ||
f83759e2 | 213 | seq_printf(s, "\n=====[ partition info(%s). #%d ]=====\n", |
214 | bdevname(si->sbi->sb->s_bdev, devname), i++); | |
7880ceed HL |
215 | seq_printf(s, "[SB: 1] [CP: 2] [SIT: %d] [NAT: %d] ", |
216 | si->sit_area_segs, si->nat_area_segs); | |
902829aa GKH |
217 | seq_printf(s, "[SSA: %d] [MAIN: %d", |
218 | si->ssa_area_segs, si->main_area_segs); | |
219 | seq_printf(s, "(OverProv:%d Resv:%d)]\n\n", | |
220 | si->overp_segs, si->rsvd_segs); | |
221 | seq_printf(s, "Utilization: %d%% (%d valid blocks)\n", | |
222 | si->utilization, si->valid_count); | |
223 | seq_printf(s, " - Node: %u (Inode: %u, ", | |
224 | si->valid_node_count, si->valid_inode_count); | |
225 | seq_printf(s, "Other: %u)\n - Data: %u\n", | |
226 | si->valid_node_count - si->valid_inode_count, | |
227 | si->valid_count - si->valid_node_count); | |
0dbdc2ae JK |
228 | seq_printf(s, " - Inline_data Inode: %u\n", |
229 | si->inline_inode); | |
3289c061 JK |
230 | seq_printf(s, " - Inline_dentry Inode: %u\n", |
231 | si->inline_dir); | |
902829aa GKH |
232 | seq_printf(s, "\nMain area: %d segs, %d secs %d zones\n", |
233 | si->main_area_segs, si->main_area_sections, | |
234 | si->main_area_zones); | |
235 | seq_printf(s, " - COLD data: %d, %d, %d\n", | |
236 | si->curseg[CURSEG_COLD_DATA], | |
237 | si->cursec[CURSEG_COLD_DATA], | |
238 | si->curzone[CURSEG_COLD_DATA]); | |
239 | seq_printf(s, " - WARM data: %d, %d, %d\n", | |
240 | si->curseg[CURSEG_WARM_DATA], | |
241 | si->cursec[CURSEG_WARM_DATA], | |
242 | si->curzone[CURSEG_WARM_DATA]); | |
243 | seq_printf(s, " - HOT data: %d, %d, %d\n", | |
244 | si->curseg[CURSEG_HOT_DATA], | |
245 | si->cursec[CURSEG_HOT_DATA], | |
246 | si->curzone[CURSEG_HOT_DATA]); | |
247 | seq_printf(s, " - Dir dnode: %d, %d, %d\n", | |
248 | si->curseg[CURSEG_HOT_NODE], | |
249 | si->cursec[CURSEG_HOT_NODE], | |
250 | si->curzone[CURSEG_HOT_NODE]); | |
251 | seq_printf(s, " - File dnode: %d, %d, %d\n", | |
252 | si->curseg[CURSEG_WARM_NODE], | |
253 | si->cursec[CURSEG_WARM_NODE], | |
254 | si->curzone[CURSEG_WARM_NODE]); | |
255 | seq_printf(s, " - Indir nodes: %d, %d, %d\n", | |
256 | si->curseg[CURSEG_COLD_NODE], | |
257 | si->cursec[CURSEG_COLD_NODE], | |
258 | si->curzone[CURSEG_COLD_NODE]); | |
259 | seq_printf(s, "\n - Valid: %d\n - Dirty: %d\n", | |
260 | si->main_area_segs - si->dirty_count - | |
261 | si->prefree_count - si->free_segs, | |
262 | si->dirty_count); | |
263 | seq_printf(s, " - Prefree: %d\n - Free: %d (%d)\n\n", | |
264 | si->prefree_count, si->free_segs, si->free_secs); | |
942e0be6 | 265 | seq_printf(s, "CP calls: %d\n", si->cp_count); |
902829aa GKH |
266 | seq_printf(s, "GC calls: %d (BG: %d)\n", |
267 | si->call_count, si->bg_gc); | |
e1235983 CL |
268 | seq_printf(s, " - data segments : %d (%d)\n", |
269 | si->data_segs, si->bg_data_segs); | |
270 | seq_printf(s, " - node segments : %d (%d)\n", | |
271 | si->node_segs, si->bg_node_segs); | |
272 | seq_printf(s, "Try to move %d blocks (BG: %d)\n", si->tot_blks, | |
273 | si->bg_data_blks + si->bg_node_blks); | |
274 | seq_printf(s, " - data blocks : %d (%d)\n", si->data_blks, | |
275 | si->bg_data_blks); | |
276 | seq_printf(s, " - node blocks : %d (%d)\n", si->node_blks, | |
277 | si->bg_node_blks); | |
902829aa GKH |
278 | seq_printf(s, "\nExtent Hit Ratio: %d / %d\n", |
279 | si->hit_ext, si->total_ext); | |
4bf6fd9f CY |
280 | seq_printf(s, "\nExtent Tree Count: %d\n", si->ext_tree); |
281 | seq_printf(s, "\nExtent Node Count: %d\n", si->ext_node); | |
6c311ec6 | 282 | seq_puts(s, "\nBalancing F2FS Async:\n"); |
d24bdcbf JK |
283 | seq_printf(s, " - inmem: %4d, wb: %4d\n", |
284 | si->inmem_pages, si->wb_pages); | |
499046ab | 285 | seq_printf(s, " - nodes: %4d in %4d\n", |
902829aa | 286 | si->ndirty_node, si->node_pages); |
499046ab | 287 | seq_printf(s, " - dents: %4d in dirs:%4d\n", |
902829aa | 288 | si->ndirty_dent, si->ndirty_dirs); |
499046ab | 289 | seq_printf(s, " - meta: %4d in %4d\n", |
902829aa | 290 | si->ndirty_meta, si->meta_pages); |
dd4e4b59 JK |
291 | seq_printf(s, " - NATs: %9d/%9d\n - SITs: %9d/%9d\n", |
292 | si->dirty_nats, si->nats, si->dirty_sits, si->sits); | |
a5f42010 JK |
293 | seq_printf(s, " - free_nids: %9d\n", |
294 | si->fnids); | |
2d219c51 GZ |
295 | seq_puts(s, "\nDistribution of User Blocks:"); |
296 | seq_puts(s, " [ valid | invalid | free ]\n"); | |
297 | seq_puts(s, " ["); | |
902829aa GKH |
298 | |
299 | for (j = 0; j < si->util_valid; j++) | |
2d219c51 GZ |
300 | seq_putc(s, '-'); |
301 | seq_putc(s, '|'); | |
902829aa GKH |
302 | |
303 | for (j = 0; j < si->util_invalid; j++) | |
2d219c51 GZ |
304 | seq_putc(s, '-'); |
305 | seq_putc(s, '|'); | |
902829aa GKH |
306 | |
307 | for (j = 0; j < si->util_free; j++) | |
2d219c51 GZ |
308 | seq_putc(s, '-'); |
309 | seq_puts(s, "]\n\n"); | |
b9a2c252 | 310 | seq_printf(s, "IPU: %u blocks\n", si->inplace_count); |
902829aa GKH |
311 | seq_printf(s, "SSR: %u blocks in %u segments\n", |
312 | si->block_count[SSR], si->segment_count[SSR]); | |
313 | seq_printf(s, "LFS: %u blocks in %u segments\n", | |
314 | si->block_count[LFS], si->segment_count[LFS]); | |
315 | ||
316 | /* segment usage info */ | |
317 | update_sit_info(si->sbi); | |
318 | seq_printf(s, "\nBDF: %u, avg. vblocks: %u\n", | |
319 | si->bimodal, si->avg_vblocks); | |
320 | ||
321 | /* memory footprint */ | |
322 | update_mem_info(si->sbi); | |
6f0aacbc JK |
323 | seq_printf(s, "\nMemory: %u KB\n", |
324 | (si->base_mem + si->cache_mem + si->page_mem) >> 10); | |
325 | seq_printf(s, " - static: %u KB\n", | |
326 | si->base_mem >> 10); | |
327 | seq_printf(s, " - cached: %u KB\n", | |
328 | si->cache_mem >> 10); | |
329 | seq_printf(s, " - paged : %u KB\n", | |
330 | si->page_mem >> 10); | |
902829aa | 331 | } |
66af62ce | 332 | mutex_unlock(&f2fs_stat_mutex); |
902829aa GKH |
333 | return 0; |
334 | } | |
335 | ||
336 | static int stat_open(struct inode *inode, struct file *file) | |
337 | { | |
338 | return single_open(file, stat_show, inode->i_private); | |
339 | } | |
340 | ||
341 | static const struct file_operations stat_fops = { | |
342 | .open = stat_open, | |
343 | .read = seq_read, | |
344 | .llseek = seq_lseek, | |
345 | .release = single_release, | |
346 | }; | |
347 | ||
4589d25d | 348 | int f2fs_build_stats(struct f2fs_sb_info *sbi) |
902829aa GKH |
349 | { |
350 | struct f2fs_super_block *raw_super = F2FS_RAW_SUPER(sbi); | |
351 | struct f2fs_stat_info *si; | |
352 | ||
963d4f7d GZ |
353 | si = kzalloc(sizeof(struct f2fs_stat_info), GFP_KERNEL); |
354 | if (!si) | |
902829aa GKH |
355 | return -ENOMEM; |
356 | ||
902829aa GKH |
357 | si->all_area_segs = le32_to_cpu(raw_super->segment_count); |
358 | si->sit_area_segs = le32_to_cpu(raw_super->segment_count_sit); | |
359 | si->nat_area_segs = le32_to_cpu(raw_super->segment_count_nat); | |
360 | si->ssa_area_segs = le32_to_cpu(raw_super->segment_count_ssa); | |
361 | si->main_area_segs = le32_to_cpu(raw_super->segment_count_main); | |
362 | si->main_area_sections = le32_to_cpu(raw_super->section_count); | |
363 | si->main_area_zones = si->main_area_sections / | |
364 | le32_to_cpu(raw_super->secs_per_zone); | |
365 | si->sbi = sbi; | |
963d4f7d | 366 | sbi->stat_info = si; |
66af62ce | 367 | |
03e14d52 CY |
368 | atomic_set(&sbi->inline_inode, 0); |
369 | atomic_set(&sbi->inline_dir, 0); | |
b9a2c252 | 370 | atomic_set(&sbi->inplace_count, 0); |
03e14d52 | 371 | |
66af62ce | 372 | mutex_lock(&f2fs_stat_mutex); |
373 | list_add_tail(&si->stat_list, &f2fs_stat_list); | |
374 | mutex_unlock(&f2fs_stat_mutex); | |
375 | ||
902829aa GKH |
376 | return 0; |
377 | } | |
378 | ||
902829aa GKH |
379 | void f2fs_destroy_stats(struct f2fs_sb_info *sbi) |
380 | { | |
963d4f7d | 381 | struct f2fs_stat_info *si = F2FS_STAT(sbi); |
902829aa | 382 | |
66af62ce | 383 | mutex_lock(&f2fs_stat_mutex); |
902829aa | 384 | list_del(&si->stat_list); |
66af62ce | 385 | mutex_unlock(&f2fs_stat_mutex); |
386 | ||
963d4f7d | 387 | kfree(si); |
902829aa GKH |
388 | } |
389 | ||
4589d25d NJ |
390 | void __init f2fs_create_root_stats(void) |
391 | { | |
c524723e YL |
392 | struct dentry *file; |
393 | ||
40e1ebe9 YL |
394 | f2fs_debugfs_root = debugfs_create_dir("f2fs", NULL); |
395 | if (!f2fs_debugfs_root) | |
7a6c76b1 | 396 | return; |
c524723e | 397 | |
40e1ebe9 | 398 | file = debugfs_create_file("status", S_IRUGO, f2fs_debugfs_root, |
c524723e | 399 | NULL, &stat_fops); |
7a6c76b1 GZ |
400 | if (!file) { |
401 | debugfs_remove(f2fs_debugfs_root); | |
402 | f2fs_debugfs_root = NULL; | |
403 | } | |
4589d25d NJ |
404 | } |
405 | ||
406 | void f2fs_destroy_root_stats(void) | |
902829aa | 407 | { |
40e1ebe9 | 408 | if (!f2fs_debugfs_root) |
c524723e YL |
409 | return; |
410 | ||
40e1ebe9 YL |
411 | debugfs_remove_recursive(f2fs_debugfs_root); |
412 | f2fs_debugfs_root = NULL; | |
902829aa | 413 | } |