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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
23static LIST_HEAD(f2fs_stat_list);
24static struct dentry *f2fs_debugfs_root;
25static DEFINE_MUTEX(f2fs_stat_mutex);
26
27static 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 */
151static 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 */
184static 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
237get_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
279static 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
463DEFINE_SHOW_ATTRIBUTE(stat);
464
465int 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
510void 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
521void __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
529void f2fs_destroy_root_stats(void)
530{
531 debugfs_remove_recursive(f2fs_debugfs_root);
532 f2fs_debugfs_root = NULL;
533}