36d7e40bf12eae647e2a47849cf4ab545b1d1fd1
[linux-2.6-microblaze.git] / fs / f2fs / sysfs.c
1 // SPDX-License-Identifier: GPL-2.0
2 /*
3  * f2fs sysfs interface
4  *
5  * Copyright (c) 2012 Samsung Electronics Co., Ltd.
6  *             http://www.samsung.com/
7  * Copyright (c) 2017 Chao Yu <chao@kernel.org>
8  */
9 #include <linux/compiler.h>
10 #include <linux/proc_fs.h>
11 #include <linux/f2fs_fs.h>
12 #include <linux/seq_file.h>
13 #include <linux/unicode.h>
14 #include <linux/ioprio.h>
15 #include <linux/sysfs.h>
16
17 #include "f2fs.h"
18 #include "segment.h"
19 #include "gc.h"
20 #include <trace/events/f2fs.h>
21
22 static struct proc_dir_entry *f2fs_proc_root;
23
24 /* Sysfs support for f2fs */
25 enum {
26         GC_THREAD,      /* struct f2fs_gc_thread */
27         SM_INFO,        /* struct f2fs_sm_info */
28         DCC_INFO,       /* struct discard_cmd_control */
29         NM_INFO,        /* struct f2fs_nm_info */
30         F2FS_SBI,       /* struct f2fs_sb_info */
31 #ifdef CONFIG_F2FS_STAT_FS
32         STAT_INFO,      /* struct f2fs_stat_info */
33 #endif
34 #ifdef CONFIG_F2FS_FAULT_INJECTION
35         FAULT_INFO_RATE,        /* struct f2fs_fault_info */
36         FAULT_INFO_TYPE,        /* struct f2fs_fault_info */
37 #endif
38         RESERVED_BLOCKS,        /* struct f2fs_sb_info */
39         CPRC_INFO,      /* struct ckpt_req_control */
40         ATGC_INFO,      /* struct atgc_management */
41 };
42
43 struct f2fs_attr {
44         struct attribute attr;
45         ssize_t (*show)(struct f2fs_attr *, struct f2fs_sb_info *, char *);
46         ssize_t (*store)(struct f2fs_attr *, struct f2fs_sb_info *,
47                          const char *, size_t);
48         int struct_type;
49         int offset;
50         int id;
51 };
52
53 static ssize_t f2fs_sbi_show(struct f2fs_attr *a,
54                              struct f2fs_sb_info *sbi, char *buf);
55
56 static unsigned char *__struct_ptr(struct f2fs_sb_info *sbi, int struct_type)
57 {
58         if (struct_type == GC_THREAD)
59                 return (unsigned char *)sbi->gc_thread;
60         else if (struct_type == SM_INFO)
61                 return (unsigned char *)SM_I(sbi);
62         else if (struct_type == DCC_INFO)
63                 return (unsigned char *)SM_I(sbi)->dcc_info;
64         else if (struct_type == NM_INFO)
65                 return (unsigned char *)NM_I(sbi);
66         else if (struct_type == F2FS_SBI || struct_type == RESERVED_BLOCKS)
67                 return (unsigned char *)sbi;
68 #ifdef CONFIG_F2FS_FAULT_INJECTION
69         else if (struct_type == FAULT_INFO_RATE ||
70                                         struct_type == FAULT_INFO_TYPE)
71                 return (unsigned char *)&F2FS_OPTION(sbi).fault_info;
72 #endif
73 #ifdef CONFIG_F2FS_STAT_FS
74         else if (struct_type == STAT_INFO)
75                 return (unsigned char *)F2FS_STAT(sbi);
76 #endif
77         else if (struct_type == CPRC_INFO)
78                 return (unsigned char *)&sbi->cprc_info;
79         else if (struct_type == ATGC_INFO)
80                 return (unsigned char *)&sbi->am;
81         return NULL;
82 }
83
84 static ssize_t dirty_segments_show(struct f2fs_attr *a,
85                 struct f2fs_sb_info *sbi, char *buf)
86 {
87         return sprintf(buf, "%llu\n",
88                         (unsigned long long)(dirty_segments(sbi)));
89 }
90
91 static ssize_t free_segments_show(struct f2fs_attr *a,
92                 struct f2fs_sb_info *sbi, char *buf)
93 {
94         return sprintf(buf, "%llu\n",
95                         (unsigned long long)(free_segments(sbi)));
96 }
97
98 static ssize_t ovp_segments_show(struct f2fs_attr *a,
99                 struct f2fs_sb_info *sbi, char *buf)
100 {
101         return sprintf(buf, "%llu\n",
102                         (unsigned long long)(overprovision_segments(sbi)));
103 }
104
105 static ssize_t lifetime_write_kbytes_show(struct f2fs_attr *a,
106                 struct f2fs_sb_info *sbi, char *buf)
107 {
108         return sprintf(buf, "%llu\n",
109                         (unsigned long long)(sbi->kbytes_written +
110                         ((f2fs_get_sectors_written(sbi) -
111                                 sbi->sectors_written_start) >> 1)));
112 }
113
114 static ssize_t sb_status_show(struct f2fs_attr *a,
115                 struct f2fs_sb_info *sbi, char *buf)
116 {
117         return sprintf(buf, "%lx\n", sbi->s_flag);
118 }
119
120 static ssize_t features_show(struct f2fs_attr *a,
121                 struct f2fs_sb_info *sbi, char *buf)
122 {
123         int len = 0;
124
125         if (f2fs_sb_has_encrypt(sbi))
126                 len += scnprintf(buf, PAGE_SIZE - len, "%s",
127                                                 "encryption");
128         if (f2fs_sb_has_blkzoned(sbi))
129                 len += scnprintf(buf + len, PAGE_SIZE - len, "%s%s",
130                                 len ? ", " : "", "blkzoned");
131         if (f2fs_sb_has_extra_attr(sbi))
132                 len += scnprintf(buf + len, PAGE_SIZE - len, "%s%s",
133                                 len ? ", " : "", "extra_attr");
134         if (f2fs_sb_has_project_quota(sbi))
135                 len += scnprintf(buf + len, PAGE_SIZE - len, "%s%s",
136                                 len ? ", " : "", "projquota");
137         if (f2fs_sb_has_inode_chksum(sbi))
138                 len += scnprintf(buf + len, PAGE_SIZE - len, "%s%s",
139                                 len ? ", " : "", "inode_checksum");
140         if (f2fs_sb_has_flexible_inline_xattr(sbi))
141                 len += scnprintf(buf + len, PAGE_SIZE - len, "%s%s",
142                                 len ? ", " : "", "flexible_inline_xattr");
143         if (f2fs_sb_has_quota_ino(sbi))
144                 len += scnprintf(buf + len, PAGE_SIZE - len, "%s%s",
145                                 len ? ", " : "", "quota_ino");
146         if (f2fs_sb_has_inode_crtime(sbi))
147                 len += scnprintf(buf + len, PAGE_SIZE - len, "%s%s",
148                                 len ? ", " : "", "inode_crtime");
149         if (f2fs_sb_has_lost_found(sbi))
150                 len += scnprintf(buf + len, PAGE_SIZE - len, "%s%s",
151                                 len ? ", " : "", "lost_found");
152         if (f2fs_sb_has_verity(sbi))
153                 len += scnprintf(buf + len, PAGE_SIZE - len, "%s%s",
154                                 len ? ", " : "", "verity");
155         if (f2fs_sb_has_sb_chksum(sbi))
156                 len += scnprintf(buf + len, PAGE_SIZE - len, "%s%s",
157                                 len ? ", " : "", "sb_checksum");
158         if (f2fs_sb_has_casefold(sbi))
159                 len += scnprintf(buf + len, PAGE_SIZE - len, "%s%s",
160                                 len ? ", " : "", "casefold");
161         if (f2fs_sb_has_readonly(sbi))
162                 len += scnprintf(buf + len, PAGE_SIZE - len, "%s%s",
163                                 len ? ", " : "", "readonly");
164         if (f2fs_sb_has_compression(sbi))
165                 len += scnprintf(buf + len, PAGE_SIZE - len, "%s%s",
166                                 len ? ", " : "", "compression");
167         len += scnprintf(buf + len, PAGE_SIZE - len, "%s%s",
168                                 len ? ", " : "", "pin_file");
169         len += scnprintf(buf + len, PAGE_SIZE - len, "\n");
170         return len;
171 }
172
173 static ssize_t current_reserved_blocks_show(struct f2fs_attr *a,
174                                         struct f2fs_sb_info *sbi, char *buf)
175 {
176         return sprintf(buf, "%u\n", sbi->current_reserved_blocks);
177 }
178
179 static ssize_t unusable_show(struct f2fs_attr *a,
180                 struct f2fs_sb_info *sbi, char *buf)
181 {
182         block_t unusable;
183
184         if (test_opt(sbi, DISABLE_CHECKPOINT))
185                 unusable = sbi->unusable_block_count;
186         else
187                 unusable = f2fs_get_unusable_blocks(sbi);
188         return sprintf(buf, "%llu\n", (unsigned long long)unusable);
189 }
190
191 static ssize_t encoding_show(struct f2fs_attr *a,
192                 struct f2fs_sb_info *sbi, char *buf)
193 {
194 #ifdef CONFIG_UNICODE
195         struct super_block *sb = sbi->sb;
196
197         if (f2fs_sb_has_casefold(sbi))
198                 return snprintf(buf, PAGE_SIZE, "%s (%d.%d.%d)\n",
199                         sb->s_encoding->charset,
200                         (sb->s_encoding->version >> 16) & 0xff,
201                         (sb->s_encoding->version >> 8) & 0xff,
202                         sb->s_encoding->version & 0xff);
203 #endif
204         return sprintf(buf, "(none)");
205 }
206
207 static ssize_t mounted_time_sec_show(struct f2fs_attr *a,
208                 struct f2fs_sb_info *sbi, char *buf)
209 {
210         return sprintf(buf, "%llu", SIT_I(sbi)->mounted_time);
211 }
212
213 #ifdef CONFIG_F2FS_STAT_FS
214 static ssize_t moved_blocks_foreground_show(struct f2fs_attr *a,
215                                 struct f2fs_sb_info *sbi, char *buf)
216 {
217         struct f2fs_stat_info *si = F2FS_STAT(sbi);
218
219         return sprintf(buf, "%llu\n",
220                 (unsigned long long)(si->tot_blks -
221                         (si->bg_data_blks + si->bg_node_blks)));
222 }
223
224 static ssize_t moved_blocks_background_show(struct f2fs_attr *a,
225                                 struct f2fs_sb_info *sbi, char *buf)
226 {
227         struct f2fs_stat_info *si = F2FS_STAT(sbi);
228
229         return sprintf(buf, "%llu\n",
230                 (unsigned long long)(si->bg_data_blks + si->bg_node_blks));
231 }
232
233 static ssize_t avg_vblocks_show(struct f2fs_attr *a,
234                 struct f2fs_sb_info *sbi, char *buf)
235 {
236         struct f2fs_stat_info *si = F2FS_STAT(sbi);
237
238         si->dirty_count = dirty_segments(sbi);
239         f2fs_update_sit_info(sbi);
240         return sprintf(buf, "%llu\n", (unsigned long long)(si->avg_vblocks));
241 }
242 #endif
243
244 static ssize_t main_blkaddr_show(struct f2fs_attr *a,
245                                 struct f2fs_sb_info *sbi, char *buf)
246 {
247         return snprintf(buf, PAGE_SIZE, "%llu\n",
248                         (unsigned long long)MAIN_BLKADDR(sbi));
249 }
250
251 static ssize_t f2fs_sbi_show(struct f2fs_attr *a,
252                         struct f2fs_sb_info *sbi, char *buf)
253 {
254         unsigned char *ptr = NULL;
255         unsigned int *ui;
256
257         ptr = __struct_ptr(sbi, a->struct_type);
258         if (!ptr)
259                 return -EINVAL;
260
261         if (!strcmp(a->attr.name, "extension_list")) {
262                 __u8 (*extlist)[F2FS_EXTENSION_LEN] =
263                                         sbi->raw_super->extension_list;
264                 int cold_count = le32_to_cpu(sbi->raw_super->extension_count);
265                 int hot_count = sbi->raw_super->hot_ext_count;
266                 int len = 0, i;
267
268                 len += scnprintf(buf + len, PAGE_SIZE - len,
269                                                 "cold file extension:\n");
270                 for (i = 0; i < cold_count; i++)
271                         len += scnprintf(buf + len, PAGE_SIZE - len, "%s\n",
272                                                                 extlist[i]);
273
274                 len += scnprintf(buf + len, PAGE_SIZE - len,
275                                                 "hot file extension:\n");
276                 for (i = cold_count; i < cold_count + hot_count; i++)
277                         len += scnprintf(buf + len, PAGE_SIZE - len, "%s\n",
278                                                                 extlist[i]);
279                 return len;
280         }
281
282         if (!strcmp(a->attr.name, "ckpt_thread_ioprio")) {
283                 struct ckpt_req_control *cprc = &sbi->cprc_info;
284                 int len = 0;
285                 int class = IOPRIO_PRIO_CLASS(cprc->ckpt_thread_ioprio);
286                 int data = IOPRIO_PRIO_DATA(cprc->ckpt_thread_ioprio);
287
288                 if (class == IOPRIO_CLASS_RT)
289                         len += scnprintf(buf + len, PAGE_SIZE - len, "rt,");
290                 else if (class == IOPRIO_CLASS_BE)
291                         len += scnprintf(buf + len, PAGE_SIZE - len, "be,");
292                 else
293                         return -EINVAL;
294
295                 len += scnprintf(buf + len, PAGE_SIZE - len, "%d\n", data);
296                 return len;
297         }
298
299 #ifdef CONFIG_F2FS_FS_COMPRESSION
300         if (!strcmp(a->attr.name, "compr_written_block"))
301                 return sysfs_emit(buf, "%llu\n", sbi->compr_written_block);
302
303         if (!strcmp(a->attr.name, "compr_saved_block"))
304                 return sysfs_emit(buf, "%llu\n", sbi->compr_saved_block);
305
306         if (!strcmp(a->attr.name, "compr_new_inode"))
307                 return sysfs_emit(buf, "%u\n", sbi->compr_new_inode);
308 #endif
309
310         if (!strcmp(a->attr.name, "gc_segment_mode"))
311                 return sysfs_emit(buf, "%u\n", sbi->gc_segment_mode);
312
313         if (!strcmp(a->attr.name, "gc_reclaimed_segments")) {
314                 return sysfs_emit(buf, "%u\n",
315                         sbi->gc_reclaimed_segs[sbi->gc_segment_mode]);
316         }
317
318         ui = (unsigned int *)(ptr + a->offset);
319
320         return sprintf(buf, "%u\n", *ui);
321 }
322
323 static ssize_t __sbi_store(struct f2fs_attr *a,
324                         struct f2fs_sb_info *sbi,
325                         const char *buf, size_t count)
326 {
327         unsigned char *ptr;
328         unsigned long t;
329         unsigned int *ui;
330         ssize_t ret;
331
332         ptr = __struct_ptr(sbi, a->struct_type);
333         if (!ptr)
334                 return -EINVAL;
335
336         if (!strcmp(a->attr.name, "extension_list")) {
337                 const char *name = strim((char *)buf);
338                 bool set = true, hot;
339
340                 if (!strncmp(name, "[h]", 3))
341                         hot = true;
342                 else if (!strncmp(name, "[c]", 3))
343                         hot = false;
344                 else
345                         return -EINVAL;
346
347                 name += 3;
348
349                 if (*name == '!') {
350                         name++;
351                         set = false;
352                 }
353
354                 if (!strlen(name) || strlen(name) >= F2FS_EXTENSION_LEN)
355                         return -EINVAL;
356
357                 down_write(&sbi->sb_lock);
358
359                 ret = f2fs_update_extension_list(sbi, name, hot, set);
360                 if (ret)
361                         goto out;
362
363                 ret = f2fs_commit_super(sbi, false);
364                 if (ret)
365                         f2fs_update_extension_list(sbi, name, hot, !set);
366 out:
367                 up_write(&sbi->sb_lock);
368                 return ret ? ret : count;
369         }
370
371         if (!strcmp(a->attr.name, "ckpt_thread_ioprio")) {
372                 const char *name = strim((char *)buf);
373                 struct ckpt_req_control *cprc = &sbi->cprc_info;
374                 int class;
375                 long data;
376                 int ret;
377
378                 if (!strncmp(name, "rt,", 3))
379                         class = IOPRIO_CLASS_RT;
380                 else if (!strncmp(name, "be,", 3))
381                         class = IOPRIO_CLASS_BE;
382                 else
383                         return -EINVAL;
384
385                 name += 3;
386                 ret = kstrtol(name, 10, &data);
387                 if (ret)
388                         return ret;
389                 if (data >= IOPRIO_BE_NR || data < 0)
390                         return -EINVAL;
391
392                 cprc->ckpt_thread_ioprio = IOPRIO_PRIO_VALUE(class, data);
393                 if (test_opt(sbi, MERGE_CHECKPOINT)) {
394                         ret = set_task_ioprio(cprc->f2fs_issue_ckpt,
395                                         cprc->ckpt_thread_ioprio);
396                         if (ret)
397                                 return ret;
398                 }
399
400                 return count;
401         }
402
403         ui = (unsigned int *)(ptr + a->offset);
404
405         ret = kstrtoul(skip_spaces(buf), 0, &t);
406         if (ret < 0)
407                 return ret;
408 #ifdef CONFIG_F2FS_FAULT_INJECTION
409         if (a->struct_type == FAULT_INFO_TYPE && t >= (1 << FAULT_MAX))
410                 return -EINVAL;
411         if (a->struct_type == FAULT_INFO_RATE && t >= UINT_MAX)
412                 return -EINVAL;
413 #endif
414         if (a->struct_type == RESERVED_BLOCKS) {
415                 spin_lock(&sbi->stat_lock);
416                 if (t > (unsigned long)(sbi->user_block_count -
417                                 F2FS_OPTION(sbi).root_reserved_blocks)) {
418                         spin_unlock(&sbi->stat_lock);
419                         return -EINVAL;
420                 }
421                 *ui = t;
422                 sbi->current_reserved_blocks = min(sbi->reserved_blocks,
423                                 sbi->user_block_count - valid_user_blocks(sbi));
424                 spin_unlock(&sbi->stat_lock);
425                 return count;
426         }
427
428         if (!strcmp(a->attr.name, "discard_granularity")) {
429                 if (t == 0 || t > MAX_PLIST_NUM)
430                         return -EINVAL;
431                 if (!f2fs_block_unit_discard(sbi))
432                         return -EINVAL;
433                 if (t == *ui)
434                         return count;
435                 *ui = t;
436                 return count;
437         }
438
439         if (!strcmp(a->attr.name, "migration_granularity")) {
440                 if (t == 0 || t > sbi->segs_per_sec)
441                         return -EINVAL;
442         }
443
444         if (!strcmp(a->attr.name, "trim_sections"))
445                 return -EINVAL;
446
447         if (!strcmp(a->attr.name, "gc_urgent")) {
448                 if (t == 0) {
449                         sbi->gc_mode = GC_NORMAL;
450                 } else if (t == 1) {
451                         sbi->gc_mode = GC_URGENT_HIGH;
452                         if (sbi->gc_thread) {
453                                 sbi->gc_thread->gc_wake = 1;
454                                 wake_up_interruptible_all(
455                                         &sbi->gc_thread->gc_wait_queue_head);
456                                 wake_up_discard_thread(sbi, true);
457                         }
458                 } else if (t == 2) {
459                         sbi->gc_mode = GC_URGENT_LOW;
460                 } else {
461                         return -EINVAL;
462                 }
463                 return count;
464         }
465         if (!strcmp(a->attr.name, "gc_idle")) {
466                 if (t == GC_IDLE_CB) {
467                         sbi->gc_mode = GC_IDLE_CB;
468                 } else if (t == GC_IDLE_GREEDY) {
469                         sbi->gc_mode = GC_IDLE_GREEDY;
470                 } else if (t == GC_IDLE_AT) {
471                         if (!sbi->am.atgc_enabled)
472                                 return -EINVAL;
473                         sbi->gc_mode = GC_AT;
474                 } else {
475                         sbi->gc_mode = GC_NORMAL;
476                 }
477                 return count;
478         }
479
480         if (!strcmp(a->attr.name, "iostat_enable")) {
481                 sbi->iostat_enable = !!t;
482                 if (!sbi->iostat_enable)
483                         f2fs_reset_iostat(sbi);
484                 return count;
485         }
486
487         if (!strcmp(a->attr.name, "iostat_period_ms")) {
488                 if (t < MIN_IOSTAT_PERIOD_MS || t > MAX_IOSTAT_PERIOD_MS)
489                         return -EINVAL;
490                 spin_lock(&sbi->iostat_lock);
491                 sbi->iostat_period_ms = (unsigned int)t;
492                 spin_unlock(&sbi->iostat_lock);
493                 return count;
494         }
495
496 #ifdef CONFIG_F2FS_FS_COMPRESSION
497         if (!strcmp(a->attr.name, "compr_written_block") ||
498                 !strcmp(a->attr.name, "compr_saved_block")) {
499                 if (t != 0)
500                         return -EINVAL;
501                 sbi->compr_written_block = 0;
502                 sbi->compr_saved_block = 0;
503                 return count;
504         }
505
506         if (!strcmp(a->attr.name, "compr_new_inode")) {
507                 if (t != 0)
508                         return -EINVAL;
509                 sbi->compr_new_inode = 0;
510                 return count;
511         }
512 #endif
513
514         if (!strcmp(a->attr.name, "atgc_candidate_ratio")) {
515                 if (t > 100)
516                         return -EINVAL;
517                 sbi->am.candidate_ratio = t;
518                 return count;
519         }
520
521         if (!strcmp(a->attr.name, "atgc_age_weight")) {
522                 if (t > 100)
523                         return -EINVAL;
524                 sbi->am.age_weight = t;
525                 return count;
526         }
527
528         if (!strcmp(a->attr.name, "gc_segment_mode")) {
529                 if (t < MAX_GC_MODE)
530                         sbi->gc_segment_mode = t;
531                 else
532                         return -EINVAL;
533                 return count;
534         }
535
536         if (!strcmp(a->attr.name, "gc_reclaimed_segments")) {
537                 if (t != 0)
538                         return -EINVAL;
539                 sbi->gc_reclaimed_segs[sbi->gc_segment_mode] = 0;
540                 return count;
541         }
542
543         if (!strcmp(a->attr.name, "seq_file_ra_mul")) {
544                 if (t >= MIN_RA_MUL && t <= MAX_RA_MUL)
545                         sbi->seq_file_ra_mul = t;
546                 else
547                         return -EINVAL;
548                 return count;
549         }
550
551         *ui = (unsigned int)t;
552
553         return count;
554 }
555
556 static ssize_t f2fs_sbi_store(struct f2fs_attr *a,
557                         struct f2fs_sb_info *sbi,
558                         const char *buf, size_t count)
559 {
560         ssize_t ret;
561         bool gc_entry = (!strcmp(a->attr.name, "gc_urgent") ||
562                                         a->struct_type == GC_THREAD);
563
564         if (gc_entry) {
565                 if (!down_read_trylock(&sbi->sb->s_umount))
566                         return -EAGAIN;
567         }
568         ret = __sbi_store(a, sbi, buf, count);
569         if (gc_entry)
570                 up_read(&sbi->sb->s_umount);
571
572         return ret;
573 }
574
575 static ssize_t f2fs_attr_show(struct kobject *kobj,
576                                 struct attribute *attr, char *buf)
577 {
578         struct f2fs_sb_info *sbi = container_of(kobj, struct f2fs_sb_info,
579                                                                 s_kobj);
580         struct f2fs_attr *a = container_of(attr, struct f2fs_attr, attr);
581
582         return a->show ? a->show(a, sbi, buf) : 0;
583 }
584
585 static ssize_t f2fs_attr_store(struct kobject *kobj, struct attribute *attr,
586                                                 const char *buf, size_t len)
587 {
588         struct f2fs_sb_info *sbi = container_of(kobj, struct f2fs_sb_info,
589                                                                         s_kobj);
590         struct f2fs_attr *a = container_of(attr, struct f2fs_attr, attr);
591
592         return a->store ? a->store(a, sbi, buf, len) : 0;
593 }
594
595 static void f2fs_sb_release(struct kobject *kobj)
596 {
597         struct f2fs_sb_info *sbi = container_of(kobj, struct f2fs_sb_info,
598                                                                 s_kobj);
599         complete(&sbi->s_kobj_unregister);
600 }
601
602 /*
603  * Note that there are three feature list entries:
604  * 1) /sys/fs/f2fs/features
605  *   : shows runtime features supported by in-kernel f2fs along with Kconfig.
606  *     - ref. F2FS_FEATURE_RO_ATTR()
607  *
608  * 2) /sys/fs/f2fs/$s_id/features <deprecated>
609  *   : shows on-disk features enabled by mkfs.f2fs, used for old kernels. This
610  *     won't add new feature anymore, and thus, users should check entries in 3)
611  *     instead of this 2).
612  *
613  * 3) /sys/fs/f2fs/$s_id/feature_list
614  *   : shows on-disk features enabled by mkfs.f2fs per instance, which follows
615  *     sysfs entry rule where each entry should expose single value.
616  *     This list covers old feature list provided by 2) and beyond. Therefore,
617  *     please add new on-disk feature in this list only.
618  *     - ref. F2FS_SB_FEATURE_RO_ATTR()
619  */
620 static ssize_t f2fs_feature_show(struct f2fs_attr *a,
621                 struct f2fs_sb_info *sbi, char *buf)
622 {
623         return sprintf(buf, "supported\n");
624 }
625
626 #define F2FS_FEATURE_RO_ATTR(_name)                             \
627 static struct f2fs_attr f2fs_attr_##_name = {                   \
628         .attr = {.name = __stringify(_name), .mode = 0444 },    \
629         .show   = f2fs_feature_show,                            \
630 }
631
632 static ssize_t f2fs_sb_feature_show(struct f2fs_attr *a,
633                 struct f2fs_sb_info *sbi, char *buf)
634 {
635         if (F2FS_HAS_FEATURE(sbi, a->id))
636                 return sprintf(buf, "supported\n");
637         return sprintf(buf, "unsupported\n");
638 }
639
640 #define F2FS_SB_FEATURE_RO_ATTR(_name, _feat)                   \
641 static struct f2fs_attr f2fs_attr_sb_##_name = {                \
642         .attr = {.name = __stringify(_name), .mode = 0444 },    \
643         .show   = f2fs_sb_feature_show,                         \
644         .id     = F2FS_FEATURE_##_feat,                         \
645 }
646
647 #define F2FS_ATTR_OFFSET(_struct_type, _name, _mode, _show, _store, _offset) \
648 static struct f2fs_attr f2fs_attr_##_name = {                   \
649         .attr = {.name = __stringify(_name), .mode = _mode },   \
650         .show   = _show,                                        \
651         .store  = _store,                                       \
652         .struct_type = _struct_type,                            \
653         .offset = _offset                                       \
654 }
655
656 #define F2FS_RW_ATTR(struct_type, struct_name, name, elname)    \
657         F2FS_ATTR_OFFSET(struct_type, name, 0644,               \
658                 f2fs_sbi_show, f2fs_sbi_store,                  \
659                 offsetof(struct struct_name, elname))
660
661 #define F2FS_GENERAL_RO_ATTR(name) \
662 static struct f2fs_attr f2fs_attr_##name = __ATTR(name, 0444, name##_show, NULL)
663
664 #define F2FS_STAT_ATTR(_struct_type, _struct_name, _name, _elname)      \
665 static struct f2fs_attr f2fs_attr_##_name = {                   \
666         .attr = {.name = __stringify(_name), .mode = 0444 },    \
667         .show = f2fs_sbi_show,                                  \
668         .struct_type = _struct_type,                            \
669         .offset = offsetof(struct _struct_name, _elname),       \
670 }
671
672 F2FS_RW_ATTR(GC_THREAD, f2fs_gc_kthread, gc_urgent_sleep_time,
673                                                         urgent_sleep_time);
674 F2FS_RW_ATTR(GC_THREAD, f2fs_gc_kthread, gc_min_sleep_time, min_sleep_time);
675 F2FS_RW_ATTR(GC_THREAD, f2fs_gc_kthread, gc_max_sleep_time, max_sleep_time);
676 F2FS_RW_ATTR(GC_THREAD, f2fs_gc_kthread, gc_no_gc_sleep_time, no_gc_sleep_time);
677 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, gc_idle, gc_mode);
678 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, gc_urgent, gc_mode);
679 F2FS_RW_ATTR(SM_INFO, f2fs_sm_info, reclaim_segments, rec_prefree_segments);
680 F2FS_RW_ATTR(DCC_INFO, discard_cmd_control, max_small_discards, max_discards);
681 F2FS_RW_ATTR(DCC_INFO, discard_cmd_control, discard_granularity, discard_granularity);
682 F2FS_RW_ATTR(RESERVED_BLOCKS, f2fs_sb_info, reserved_blocks, reserved_blocks);
683 F2FS_RW_ATTR(SM_INFO, f2fs_sm_info, batched_trim_sections, trim_sections);
684 F2FS_RW_ATTR(SM_INFO, f2fs_sm_info, ipu_policy, ipu_policy);
685 F2FS_RW_ATTR(SM_INFO, f2fs_sm_info, min_ipu_util, min_ipu_util);
686 F2FS_RW_ATTR(SM_INFO, f2fs_sm_info, min_fsync_blocks, min_fsync_blocks);
687 F2FS_RW_ATTR(SM_INFO, f2fs_sm_info, min_seq_blocks, min_seq_blocks);
688 F2FS_RW_ATTR(SM_INFO, f2fs_sm_info, min_hot_blocks, min_hot_blocks);
689 F2FS_RW_ATTR(SM_INFO, f2fs_sm_info, min_ssr_sections, min_ssr_sections);
690 F2FS_RW_ATTR(NM_INFO, f2fs_nm_info, ram_thresh, ram_thresh);
691 F2FS_RW_ATTR(NM_INFO, f2fs_nm_info, ra_nid_pages, ra_nid_pages);
692 F2FS_RW_ATTR(NM_INFO, f2fs_nm_info, dirty_nats_ratio, dirty_nats_ratio);
693 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, max_victim_search, max_victim_search);
694 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, migration_granularity, migration_granularity);
695 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, dir_level, dir_level);
696 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, cp_interval, interval_time[CP_TIME]);
697 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, idle_interval, interval_time[REQ_TIME]);
698 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, discard_idle_interval,
699                                         interval_time[DISCARD_TIME]);
700 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, gc_idle_interval, interval_time[GC_TIME]);
701 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info,
702                 umount_discard_timeout, interval_time[UMOUNT_DISCARD_TIMEOUT]);
703 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, iostat_enable, iostat_enable);
704 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, iostat_period_ms, iostat_period_ms);
705 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, readdir_ra, readdir_ra);
706 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, max_io_bytes, max_io_bytes);
707 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, gc_pin_file_thresh, gc_pin_file_threshold);
708 F2FS_RW_ATTR(F2FS_SBI, f2fs_super_block, extension_list, extension_list);
709 #ifdef CONFIG_F2FS_FAULT_INJECTION
710 F2FS_RW_ATTR(FAULT_INFO_RATE, f2fs_fault_info, inject_rate, inject_rate);
711 F2FS_RW_ATTR(FAULT_INFO_TYPE, f2fs_fault_info, inject_type, inject_type);
712 #endif
713 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, data_io_flag, data_io_flag);
714 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, node_io_flag, node_io_flag);
715 F2FS_RW_ATTR(CPRC_INFO, ckpt_req_control, ckpt_thread_ioprio, ckpt_thread_ioprio);
716 F2FS_GENERAL_RO_ATTR(dirty_segments);
717 F2FS_GENERAL_RO_ATTR(free_segments);
718 F2FS_GENERAL_RO_ATTR(ovp_segments);
719 F2FS_GENERAL_RO_ATTR(lifetime_write_kbytes);
720 F2FS_GENERAL_RO_ATTR(features);
721 F2FS_GENERAL_RO_ATTR(current_reserved_blocks);
722 F2FS_GENERAL_RO_ATTR(unusable);
723 F2FS_GENERAL_RO_ATTR(encoding);
724 F2FS_GENERAL_RO_ATTR(mounted_time_sec);
725 F2FS_GENERAL_RO_ATTR(main_blkaddr);
726 #ifdef CONFIG_F2FS_STAT_FS
727 F2FS_STAT_ATTR(STAT_INFO, f2fs_stat_info, cp_foreground_calls, cp_count);
728 F2FS_STAT_ATTR(STAT_INFO, f2fs_stat_info, cp_background_calls, bg_cp_count);
729 F2FS_STAT_ATTR(STAT_INFO, f2fs_stat_info, gc_foreground_calls, call_count);
730 F2FS_STAT_ATTR(STAT_INFO, f2fs_stat_info, gc_background_calls, bg_gc);
731 F2FS_GENERAL_RO_ATTR(moved_blocks_background);
732 F2FS_GENERAL_RO_ATTR(moved_blocks_foreground);
733 F2FS_GENERAL_RO_ATTR(avg_vblocks);
734 #endif
735
736 #ifdef CONFIG_FS_ENCRYPTION
737 F2FS_FEATURE_RO_ATTR(encryption);
738 F2FS_FEATURE_RO_ATTR(test_dummy_encryption_v2);
739 #ifdef CONFIG_UNICODE
740 F2FS_FEATURE_RO_ATTR(encrypted_casefold);
741 #endif
742 #endif /* CONFIG_FS_ENCRYPTION */
743 #ifdef CONFIG_BLK_DEV_ZONED
744 F2FS_FEATURE_RO_ATTR(block_zoned);
745 #endif
746 F2FS_FEATURE_RO_ATTR(atomic_write);
747 F2FS_FEATURE_RO_ATTR(extra_attr);
748 F2FS_FEATURE_RO_ATTR(project_quota);
749 F2FS_FEATURE_RO_ATTR(inode_checksum);
750 F2FS_FEATURE_RO_ATTR(flexible_inline_xattr);
751 F2FS_FEATURE_RO_ATTR(quota_ino);
752 F2FS_FEATURE_RO_ATTR(inode_crtime);
753 F2FS_FEATURE_RO_ATTR(lost_found);
754 #ifdef CONFIG_FS_VERITY
755 F2FS_FEATURE_RO_ATTR(verity);
756 #endif
757 F2FS_FEATURE_RO_ATTR(sb_checksum);
758 #ifdef CONFIG_UNICODE
759 F2FS_FEATURE_RO_ATTR(casefold);
760 #endif
761 F2FS_FEATURE_RO_ATTR(readonly);
762 #ifdef CONFIG_F2FS_FS_COMPRESSION
763 F2FS_FEATURE_RO_ATTR(compression);
764 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, compr_written_block, compr_written_block);
765 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, compr_saved_block, compr_saved_block);
766 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, compr_new_inode, compr_new_inode);
767 #endif
768 F2FS_FEATURE_RO_ATTR(pin_file);
769
770 /* For ATGC */
771 F2FS_RW_ATTR(ATGC_INFO, atgc_management, atgc_candidate_ratio, candidate_ratio);
772 F2FS_RW_ATTR(ATGC_INFO, atgc_management, atgc_candidate_count, max_candidate_count);
773 F2FS_RW_ATTR(ATGC_INFO, atgc_management, atgc_age_weight, age_weight);
774 F2FS_RW_ATTR(ATGC_INFO, atgc_management, atgc_age_threshold, age_threshold);
775
776 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, seq_file_ra_mul, seq_file_ra_mul);
777 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, gc_segment_mode, gc_segment_mode);
778 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, gc_reclaimed_segments, gc_reclaimed_segs);
779
780 #define ATTR_LIST(name) (&f2fs_attr_##name.attr)
781 static struct attribute *f2fs_attrs[] = {
782         ATTR_LIST(gc_urgent_sleep_time),
783         ATTR_LIST(gc_min_sleep_time),
784         ATTR_LIST(gc_max_sleep_time),
785         ATTR_LIST(gc_no_gc_sleep_time),
786         ATTR_LIST(gc_idle),
787         ATTR_LIST(gc_urgent),
788         ATTR_LIST(reclaim_segments),
789         ATTR_LIST(main_blkaddr),
790         ATTR_LIST(max_small_discards),
791         ATTR_LIST(discard_granularity),
792         ATTR_LIST(batched_trim_sections),
793         ATTR_LIST(ipu_policy),
794         ATTR_LIST(min_ipu_util),
795         ATTR_LIST(min_fsync_blocks),
796         ATTR_LIST(min_seq_blocks),
797         ATTR_LIST(min_hot_blocks),
798         ATTR_LIST(min_ssr_sections),
799         ATTR_LIST(max_victim_search),
800         ATTR_LIST(migration_granularity),
801         ATTR_LIST(dir_level),
802         ATTR_LIST(ram_thresh),
803         ATTR_LIST(ra_nid_pages),
804         ATTR_LIST(dirty_nats_ratio),
805         ATTR_LIST(cp_interval),
806         ATTR_LIST(idle_interval),
807         ATTR_LIST(discard_idle_interval),
808         ATTR_LIST(gc_idle_interval),
809         ATTR_LIST(umount_discard_timeout),
810         ATTR_LIST(iostat_enable),
811         ATTR_LIST(iostat_period_ms),
812         ATTR_LIST(readdir_ra),
813         ATTR_LIST(max_io_bytes),
814         ATTR_LIST(gc_pin_file_thresh),
815         ATTR_LIST(extension_list),
816 #ifdef CONFIG_F2FS_FAULT_INJECTION
817         ATTR_LIST(inject_rate),
818         ATTR_LIST(inject_type),
819 #endif
820         ATTR_LIST(data_io_flag),
821         ATTR_LIST(node_io_flag),
822         ATTR_LIST(ckpt_thread_ioprio),
823         ATTR_LIST(dirty_segments),
824         ATTR_LIST(free_segments),
825         ATTR_LIST(ovp_segments),
826         ATTR_LIST(unusable),
827         ATTR_LIST(lifetime_write_kbytes),
828         ATTR_LIST(features),
829         ATTR_LIST(reserved_blocks),
830         ATTR_LIST(current_reserved_blocks),
831         ATTR_LIST(encoding),
832         ATTR_LIST(mounted_time_sec),
833 #ifdef CONFIG_F2FS_STAT_FS
834         ATTR_LIST(cp_foreground_calls),
835         ATTR_LIST(cp_background_calls),
836         ATTR_LIST(gc_foreground_calls),
837         ATTR_LIST(gc_background_calls),
838         ATTR_LIST(moved_blocks_foreground),
839         ATTR_LIST(moved_blocks_background),
840         ATTR_LIST(avg_vblocks),
841 #endif
842 #ifdef CONFIG_F2FS_FS_COMPRESSION
843         ATTR_LIST(compr_written_block),
844         ATTR_LIST(compr_saved_block),
845         ATTR_LIST(compr_new_inode),
846 #endif
847         /* For ATGC */
848         ATTR_LIST(atgc_candidate_ratio),
849         ATTR_LIST(atgc_candidate_count),
850         ATTR_LIST(atgc_age_weight),
851         ATTR_LIST(atgc_age_threshold),
852         ATTR_LIST(seq_file_ra_mul),
853         ATTR_LIST(gc_segment_mode),
854         ATTR_LIST(gc_reclaimed_segments),
855         NULL,
856 };
857 ATTRIBUTE_GROUPS(f2fs);
858
859 static struct attribute *f2fs_feat_attrs[] = {
860 #ifdef CONFIG_FS_ENCRYPTION
861         ATTR_LIST(encryption),
862         ATTR_LIST(test_dummy_encryption_v2),
863 #ifdef CONFIG_UNICODE
864         ATTR_LIST(encrypted_casefold),
865 #endif
866 #endif /* CONFIG_FS_ENCRYPTION */
867 #ifdef CONFIG_BLK_DEV_ZONED
868         ATTR_LIST(block_zoned),
869 #endif
870         ATTR_LIST(atomic_write),
871         ATTR_LIST(extra_attr),
872         ATTR_LIST(project_quota),
873         ATTR_LIST(inode_checksum),
874         ATTR_LIST(flexible_inline_xattr),
875         ATTR_LIST(quota_ino),
876         ATTR_LIST(inode_crtime),
877         ATTR_LIST(lost_found),
878 #ifdef CONFIG_FS_VERITY
879         ATTR_LIST(verity),
880 #endif
881         ATTR_LIST(sb_checksum),
882 #ifdef CONFIG_UNICODE
883         ATTR_LIST(casefold),
884 #endif
885         ATTR_LIST(readonly),
886 #ifdef CONFIG_F2FS_FS_COMPRESSION
887         ATTR_LIST(compression),
888 #endif
889         ATTR_LIST(pin_file),
890         NULL,
891 };
892 ATTRIBUTE_GROUPS(f2fs_feat);
893
894 F2FS_GENERAL_RO_ATTR(sb_status);
895 static struct attribute *f2fs_stat_attrs[] = {
896         ATTR_LIST(sb_status),
897         NULL,
898 };
899 ATTRIBUTE_GROUPS(f2fs_stat);
900
901 F2FS_SB_FEATURE_RO_ATTR(encryption, ENCRYPT);
902 F2FS_SB_FEATURE_RO_ATTR(block_zoned, BLKZONED);
903 F2FS_SB_FEATURE_RO_ATTR(extra_attr, EXTRA_ATTR);
904 F2FS_SB_FEATURE_RO_ATTR(project_quota, PRJQUOTA);
905 F2FS_SB_FEATURE_RO_ATTR(inode_checksum, INODE_CHKSUM);
906 F2FS_SB_FEATURE_RO_ATTR(flexible_inline_xattr, FLEXIBLE_INLINE_XATTR);
907 F2FS_SB_FEATURE_RO_ATTR(quota_ino, QUOTA_INO);
908 F2FS_SB_FEATURE_RO_ATTR(inode_crtime, INODE_CRTIME);
909 F2FS_SB_FEATURE_RO_ATTR(lost_found, LOST_FOUND);
910 F2FS_SB_FEATURE_RO_ATTR(verity, VERITY);
911 F2FS_SB_FEATURE_RO_ATTR(sb_checksum, SB_CHKSUM);
912 F2FS_SB_FEATURE_RO_ATTR(casefold, CASEFOLD);
913 F2FS_SB_FEATURE_RO_ATTR(compression, COMPRESSION);
914 F2FS_SB_FEATURE_RO_ATTR(readonly, RO);
915
916 static struct attribute *f2fs_sb_feat_attrs[] = {
917         ATTR_LIST(sb_encryption),
918         ATTR_LIST(sb_block_zoned),
919         ATTR_LIST(sb_extra_attr),
920         ATTR_LIST(sb_project_quota),
921         ATTR_LIST(sb_inode_checksum),
922         ATTR_LIST(sb_flexible_inline_xattr),
923         ATTR_LIST(sb_quota_ino),
924         ATTR_LIST(sb_inode_crtime),
925         ATTR_LIST(sb_lost_found),
926         ATTR_LIST(sb_verity),
927         ATTR_LIST(sb_sb_checksum),
928         ATTR_LIST(sb_casefold),
929         ATTR_LIST(sb_compression),
930         ATTR_LIST(sb_readonly),
931         NULL,
932 };
933 ATTRIBUTE_GROUPS(f2fs_sb_feat);
934
935 static const struct sysfs_ops f2fs_attr_ops = {
936         .show   = f2fs_attr_show,
937         .store  = f2fs_attr_store,
938 };
939
940 static struct kobj_type f2fs_sb_ktype = {
941         .default_groups = f2fs_groups,
942         .sysfs_ops      = &f2fs_attr_ops,
943         .release        = f2fs_sb_release,
944 };
945
946 static struct kobj_type f2fs_ktype = {
947         .sysfs_ops      = &f2fs_attr_ops,
948 };
949
950 static struct kset f2fs_kset = {
951         .kobj   = {.ktype = &f2fs_ktype},
952 };
953
954 static struct kobj_type f2fs_feat_ktype = {
955         .default_groups = f2fs_feat_groups,
956         .sysfs_ops      = &f2fs_attr_ops,
957 };
958
959 static struct kobject f2fs_feat = {
960         .kset   = &f2fs_kset,
961 };
962
963 static ssize_t f2fs_stat_attr_show(struct kobject *kobj,
964                                 struct attribute *attr, char *buf)
965 {
966         struct f2fs_sb_info *sbi = container_of(kobj, struct f2fs_sb_info,
967                                                                 s_stat_kobj);
968         struct f2fs_attr *a = container_of(attr, struct f2fs_attr, attr);
969
970         return a->show ? a->show(a, sbi, buf) : 0;
971 }
972
973 static ssize_t f2fs_stat_attr_store(struct kobject *kobj, struct attribute *attr,
974                                                 const char *buf, size_t len)
975 {
976         struct f2fs_sb_info *sbi = container_of(kobj, struct f2fs_sb_info,
977                                                                 s_stat_kobj);
978         struct f2fs_attr *a = container_of(attr, struct f2fs_attr, attr);
979
980         return a->store ? a->store(a, sbi, buf, len) : 0;
981 }
982
983 static void f2fs_stat_kobj_release(struct kobject *kobj)
984 {
985         struct f2fs_sb_info *sbi = container_of(kobj, struct f2fs_sb_info,
986                                                                 s_stat_kobj);
987         complete(&sbi->s_stat_kobj_unregister);
988 }
989
990 static const struct sysfs_ops f2fs_stat_attr_ops = {
991         .show   = f2fs_stat_attr_show,
992         .store  = f2fs_stat_attr_store,
993 };
994
995 static struct kobj_type f2fs_stat_ktype = {
996         .default_groups = f2fs_stat_groups,
997         .sysfs_ops      = &f2fs_stat_attr_ops,
998         .release        = f2fs_stat_kobj_release,
999 };
1000
1001 static ssize_t f2fs_sb_feat_attr_show(struct kobject *kobj,
1002                                 struct attribute *attr, char *buf)
1003 {
1004         struct f2fs_sb_info *sbi = container_of(kobj, struct f2fs_sb_info,
1005                                                         s_feature_list_kobj);
1006         struct f2fs_attr *a = container_of(attr, struct f2fs_attr, attr);
1007
1008         return a->show ? a->show(a, sbi, buf) : 0;
1009 }
1010
1011 static void f2fs_feature_list_kobj_release(struct kobject *kobj)
1012 {
1013         struct f2fs_sb_info *sbi = container_of(kobj, struct f2fs_sb_info,
1014                                                         s_feature_list_kobj);
1015         complete(&sbi->s_feature_list_kobj_unregister);
1016 }
1017
1018 static const struct sysfs_ops f2fs_feature_list_attr_ops = {
1019         .show   = f2fs_sb_feat_attr_show,
1020 };
1021
1022 static struct kobj_type f2fs_feature_list_ktype = {
1023         .default_groups = f2fs_sb_feat_groups,
1024         .sysfs_ops      = &f2fs_feature_list_attr_ops,
1025         .release        = f2fs_feature_list_kobj_release,
1026 };
1027
1028 static int __maybe_unused segment_info_seq_show(struct seq_file *seq,
1029                                                 void *offset)
1030 {
1031         struct super_block *sb = seq->private;
1032         struct f2fs_sb_info *sbi = F2FS_SB(sb);
1033         unsigned int total_segs =
1034                         le32_to_cpu(sbi->raw_super->segment_count_main);
1035         int i;
1036
1037         seq_puts(seq, "format: segment_type|valid_blocks\n"
1038                 "segment_type(0:HD, 1:WD, 2:CD, 3:HN, 4:WN, 5:CN)\n");
1039
1040         for (i = 0; i < total_segs; i++) {
1041                 struct seg_entry *se = get_seg_entry(sbi, i);
1042
1043                 if ((i % 10) == 0)
1044                         seq_printf(seq, "%-10d", i);
1045                 seq_printf(seq, "%d|%-3u", se->type, se->valid_blocks);
1046                 if ((i % 10) == 9 || i == (total_segs - 1))
1047                         seq_putc(seq, '\n');
1048                 else
1049                         seq_putc(seq, ' ');
1050         }
1051
1052         return 0;
1053 }
1054
1055 static int __maybe_unused segment_bits_seq_show(struct seq_file *seq,
1056                                                 void *offset)
1057 {
1058         struct super_block *sb = seq->private;
1059         struct f2fs_sb_info *sbi = F2FS_SB(sb);
1060         unsigned int total_segs =
1061                         le32_to_cpu(sbi->raw_super->segment_count_main);
1062         int i, j;
1063
1064         seq_puts(seq, "format: segment_type|valid_blocks|bitmaps\n"
1065                 "segment_type(0:HD, 1:WD, 2:CD, 3:HN, 4:WN, 5:CN)\n");
1066
1067         for (i = 0; i < total_segs; i++) {
1068                 struct seg_entry *se = get_seg_entry(sbi, i);
1069
1070                 seq_printf(seq, "%-10d", i);
1071                 seq_printf(seq, "%d|%-3u|", se->type, se->valid_blocks);
1072                 for (j = 0; j < SIT_VBLOCK_MAP_SIZE; j++)
1073                         seq_printf(seq, " %.2x", se->cur_valid_map[j]);
1074                 seq_putc(seq, '\n');
1075         }
1076         return 0;
1077 }
1078
1079 void f2fs_record_iostat(struct f2fs_sb_info *sbi)
1080 {
1081         unsigned long long iostat_diff[NR_IO_TYPE];
1082         int i;
1083
1084         if (time_is_after_jiffies(sbi->iostat_next_period))
1085                 return;
1086
1087         /* Need double check under the lock */
1088         spin_lock(&sbi->iostat_lock);
1089         if (time_is_after_jiffies(sbi->iostat_next_period)) {
1090                 spin_unlock(&sbi->iostat_lock);
1091                 return;
1092         }
1093         sbi->iostat_next_period = jiffies +
1094                                 msecs_to_jiffies(sbi->iostat_period_ms);
1095
1096         for (i = 0; i < NR_IO_TYPE; i++) {
1097                 iostat_diff[i] = sbi->rw_iostat[i] -
1098                                 sbi->prev_rw_iostat[i];
1099                 sbi->prev_rw_iostat[i] = sbi->rw_iostat[i];
1100         }
1101         spin_unlock(&sbi->iostat_lock);
1102
1103         trace_f2fs_iostat(sbi, iostat_diff);
1104 }
1105
1106 static int __maybe_unused iostat_info_seq_show(struct seq_file *seq,
1107                                                void *offset)
1108 {
1109         struct super_block *sb = seq->private;
1110         struct f2fs_sb_info *sbi = F2FS_SB(sb);
1111         time64_t now = ktime_get_real_seconds();
1112
1113         if (!sbi->iostat_enable)
1114                 return 0;
1115
1116         seq_printf(seq, "time:          %-16llu\n", now);
1117
1118         /* print app write IOs */
1119         seq_puts(seq, "[WRITE]\n");
1120         seq_printf(seq, "app buffered:  %-16llu\n",
1121                                 sbi->rw_iostat[APP_BUFFERED_IO]);
1122         seq_printf(seq, "app direct:    %-16llu\n",
1123                                 sbi->rw_iostat[APP_DIRECT_IO]);
1124         seq_printf(seq, "app mapped:    %-16llu\n",
1125                                 sbi->rw_iostat[APP_MAPPED_IO]);
1126
1127         /* print fs write IOs */
1128         seq_printf(seq, "fs data:       %-16llu\n",
1129                                 sbi->rw_iostat[FS_DATA_IO]);
1130         seq_printf(seq, "fs node:       %-16llu\n",
1131                                 sbi->rw_iostat[FS_NODE_IO]);
1132         seq_printf(seq, "fs meta:       %-16llu\n",
1133                                 sbi->rw_iostat[FS_META_IO]);
1134         seq_printf(seq, "fs gc data:    %-16llu\n",
1135                                 sbi->rw_iostat[FS_GC_DATA_IO]);
1136         seq_printf(seq, "fs gc node:    %-16llu\n",
1137                                 sbi->rw_iostat[FS_GC_NODE_IO]);
1138         seq_printf(seq, "fs cp data:    %-16llu\n",
1139                                 sbi->rw_iostat[FS_CP_DATA_IO]);
1140         seq_printf(seq, "fs cp node:    %-16llu\n",
1141                                 sbi->rw_iostat[FS_CP_NODE_IO]);
1142         seq_printf(seq, "fs cp meta:    %-16llu\n",
1143                                 sbi->rw_iostat[FS_CP_META_IO]);
1144
1145         /* print app read IOs */
1146         seq_puts(seq, "[READ]\n");
1147         seq_printf(seq, "app buffered:  %-16llu\n",
1148                                 sbi->rw_iostat[APP_BUFFERED_READ_IO]);
1149         seq_printf(seq, "app direct:    %-16llu\n",
1150                                 sbi->rw_iostat[APP_DIRECT_READ_IO]);
1151         seq_printf(seq, "app mapped:    %-16llu\n",
1152                                 sbi->rw_iostat[APP_MAPPED_READ_IO]);
1153
1154         /* print fs read IOs */
1155         seq_printf(seq, "fs data:       %-16llu\n",
1156                                 sbi->rw_iostat[FS_DATA_READ_IO]);
1157         seq_printf(seq, "fs gc data:    %-16llu\n",
1158                                 sbi->rw_iostat[FS_GDATA_READ_IO]);
1159         seq_printf(seq, "fs compr_data: %-16llu\n",
1160                                 sbi->rw_iostat[FS_CDATA_READ_IO]);
1161         seq_printf(seq, "fs node:       %-16llu\n",
1162                                 sbi->rw_iostat[FS_NODE_READ_IO]);
1163         seq_printf(seq, "fs meta:       %-16llu\n",
1164                                 sbi->rw_iostat[FS_META_READ_IO]);
1165
1166         /* print other IOs */
1167         seq_puts(seq, "[OTHER]\n");
1168         seq_printf(seq, "fs discard:    %-16llu\n",
1169                                 sbi->rw_iostat[FS_DISCARD]);
1170
1171         return 0;
1172 }
1173
1174 static int __maybe_unused victim_bits_seq_show(struct seq_file *seq,
1175                                                 void *offset)
1176 {
1177         struct super_block *sb = seq->private;
1178         struct f2fs_sb_info *sbi = F2FS_SB(sb);
1179         struct dirty_seglist_info *dirty_i = DIRTY_I(sbi);
1180         int i;
1181
1182         seq_puts(seq, "format: victim_secmap bitmaps\n");
1183
1184         for (i = 0; i < MAIN_SECS(sbi); i++) {
1185                 if ((i % 10) == 0)
1186                         seq_printf(seq, "%-10d", i);
1187                 seq_printf(seq, "%d", test_bit(i, dirty_i->victim_secmap) ? 1 : 0);
1188                 if ((i % 10) == 9 || i == (MAIN_SECS(sbi) - 1))
1189                         seq_putc(seq, '\n');
1190                 else
1191                         seq_putc(seq, ' ');
1192         }
1193         return 0;
1194 }
1195
1196 int __init f2fs_init_sysfs(void)
1197 {
1198         int ret;
1199
1200         kobject_set_name(&f2fs_kset.kobj, "f2fs");
1201         f2fs_kset.kobj.parent = fs_kobj;
1202         ret = kset_register(&f2fs_kset);
1203         if (ret)
1204                 return ret;
1205
1206         ret = kobject_init_and_add(&f2fs_feat, &f2fs_feat_ktype,
1207                                    NULL, "features");
1208         if (ret) {
1209                 kobject_put(&f2fs_feat);
1210                 kset_unregister(&f2fs_kset);
1211         } else {
1212                 f2fs_proc_root = proc_mkdir("fs/f2fs", NULL);
1213         }
1214         return ret;
1215 }
1216
1217 void f2fs_exit_sysfs(void)
1218 {
1219         kobject_put(&f2fs_feat);
1220         kset_unregister(&f2fs_kset);
1221         remove_proc_entry("fs/f2fs", NULL);
1222         f2fs_proc_root = NULL;
1223 }
1224
1225 int f2fs_register_sysfs(struct f2fs_sb_info *sbi)
1226 {
1227         struct super_block *sb = sbi->sb;
1228         int err;
1229
1230         sbi->s_kobj.kset = &f2fs_kset;
1231         init_completion(&sbi->s_kobj_unregister);
1232         err = kobject_init_and_add(&sbi->s_kobj, &f2fs_sb_ktype, NULL,
1233                                 "%s", sb->s_id);
1234         if (err)
1235                 goto put_sb_kobj;
1236
1237         sbi->s_stat_kobj.kset = &f2fs_kset;
1238         init_completion(&sbi->s_stat_kobj_unregister);
1239         err = kobject_init_and_add(&sbi->s_stat_kobj, &f2fs_stat_ktype,
1240                                                 &sbi->s_kobj, "stat");
1241         if (err)
1242                 goto put_stat_kobj;
1243
1244         sbi->s_feature_list_kobj.kset = &f2fs_kset;
1245         init_completion(&sbi->s_feature_list_kobj_unregister);
1246         err = kobject_init_and_add(&sbi->s_feature_list_kobj,
1247                                         &f2fs_feature_list_ktype,
1248                                         &sbi->s_kobj, "feature_list");
1249         if (err)
1250                 goto put_feature_list_kobj;
1251
1252         if (f2fs_proc_root)
1253                 sbi->s_proc = proc_mkdir(sb->s_id, f2fs_proc_root);
1254
1255         if (sbi->s_proc) {
1256                 proc_create_single_data("segment_info", 0444, sbi->s_proc,
1257                                 segment_info_seq_show, sb);
1258                 proc_create_single_data("segment_bits", 0444, sbi->s_proc,
1259                                 segment_bits_seq_show, sb);
1260                 proc_create_single_data("iostat_info", 0444, sbi->s_proc,
1261                                 iostat_info_seq_show, sb);
1262                 proc_create_single_data("victim_bits", 0444, sbi->s_proc,
1263                                 victim_bits_seq_show, sb);
1264         }
1265         return 0;
1266 put_feature_list_kobj:
1267         kobject_put(&sbi->s_feature_list_kobj);
1268         wait_for_completion(&sbi->s_feature_list_kobj_unregister);
1269 put_stat_kobj:
1270         kobject_put(&sbi->s_stat_kobj);
1271         wait_for_completion(&sbi->s_stat_kobj_unregister);
1272 put_sb_kobj:
1273         kobject_put(&sbi->s_kobj);
1274         wait_for_completion(&sbi->s_kobj_unregister);
1275         return err;
1276 }
1277
1278 void f2fs_unregister_sysfs(struct f2fs_sb_info *sbi)
1279 {
1280         if (sbi->s_proc) {
1281                 remove_proc_entry("iostat_info", sbi->s_proc);
1282                 remove_proc_entry("segment_info", sbi->s_proc);
1283                 remove_proc_entry("segment_bits", sbi->s_proc);
1284                 remove_proc_entry("victim_bits", sbi->s_proc);
1285                 remove_proc_entry(sbi->sb->s_id, f2fs_proc_root);
1286         }
1287
1288         kobject_del(&sbi->s_stat_kobj);
1289         kobject_put(&sbi->s_stat_kobj);
1290         wait_for_completion(&sbi->s_stat_kobj_unregister);
1291         kobject_del(&sbi->s_feature_list_kobj);
1292         kobject_put(&sbi->s_feature_list_kobj);
1293         wait_for_completion(&sbi->s_feature_list_kobj_unregister);
1294
1295         kobject_del(&sbi->s_kobj);
1296         kobject_put(&sbi->s_kobj);
1297         wait_for_completion(&sbi->s_kobj_unregister);
1298 }