GNU Linux-libre 4.19.211-gnu1
[releases.git] / fs / f2fs / sysfs.c
1 /*
2  * f2fs sysfs interface
3  *
4  * Copyright (c) 2012 Samsung Electronics Co., Ltd.
5  *             http://www.samsung.com/
6  * Copyright (c) 2017 Chao Yu <chao@kernel.org>
7  *
8  * This program is free software; you can redistribute it and/or modify
9  * it under the terms of the GNU General Public License version 2 as
10  * published by the Free Software Foundation.
11  */
12 #include <linux/compiler.h>
13 #include <linux/proc_fs.h>
14 #include <linux/f2fs_fs.h>
15 #include <linux/seq_file.h>
16
17 #include "f2fs.h"
18 #include "segment.h"
19 #include "gc.h"
20
21 static struct proc_dir_entry *f2fs_proc_root;
22
23 /* Sysfs support for f2fs */
24 enum {
25         GC_THREAD,      /* struct f2fs_gc_thread */
26         SM_INFO,        /* struct f2fs_sm_info */
27         DCC_INFO,       /* struct discard_cmd_control */
28         NM_INFO,        /* struct f2fs_nm_info */
29         F2FS_SBI,       /* struct f2fs_sb_info */
30 #ifdef CONFIG_F2FS_FAULT_INJECTION
31         FAULT_INFO_RATE,        /* struct f2fs_fault_info */
32         FAULT_INFO_TYPE,        /* struct f2fs_fault_info */
33 #endif
34         RESERVED_BLOCKS,        /* struct f2fs_sb_info */
35 };
36
37 struct f2fs_attr {
38         struct attribute attr;
39         ssize_t (*show)(struct f2fs_attr *, struct f2fs_sb_info *, char *);
40         ssize_t (*store)(struct f2fs_attr *, struct f2fs_sb_info *,
41                          const char *, size_t);
42         int struct_type;
43         int offset;
44         int id;
45 };
46
47 static unsigned char *__struct_ptr(struct f2fs_sb_info *sbi, int struct_type)
48 {
49         if (struct_type == GC_THREAD)
50                 return (unsigned char *)sbi->gc_thread;
51         else if (struct_type == SM_INFO)
52                 return (unsigned char *)SM_I(sbi);
53         else if (struct_type == DCC_INFO)
54                 return (unsigned char *)SM_I(sbi)->dcc_info;
55         else if (struct_type == NM_INFO)
56                 return (unsigned char *)NM_I(sbi);
57         else if (struct_type == F2FS_SBI || struct_type == RESERVED_BLOCKS)
58                 return (unsigned char *)sbi;
59 #ifdef CONFIG_F2FS_FAULT_INJECTION
60         else if (struct_type == FAULT_INFO_RATE ||
61                                         struct_type == FAULT_INFO_TYPE)
62                 return (unsigned char *)&F2FS_OPTION(sbi).fault_info;
63 #endif
64         return NULL;
65 }
66
67 static ssize_t dirty_segments_show(struct f2fs_attr *a,
68                 struct f2fs_sb_info *sbi, char *buf)
69 {
70         return snprintf(buf, PAGE_SIZE, "%llu\n",
71                 (unsigned long long)(dirty_segments(sbi)));
72 }
73
74 static ssize_t lifetime_write_kbytes_show(struct f2fs_attr *a,
75                 struct f2fs_sb_info *sbi, char *buf)
76 {
77         struct super_block *sb = sbi->sb;
78
79         if (!sb->s_bdev->bd_part)
80                 return snprintf(buf, PAGE_SIZE, "0\n");
81
82         return snprintf(buf, PAGE_SIZE, "%llu\n",
83                 (unsigned long long)(sbi->kbytes_written +
84                         BD_PART_WRITTEN(sbi)));
85 }
86
87 static ssize_t features_show(struct f2fs_attr *a,
88                 struct f2fs_sb_info *sbi, char *buf)
89 {
90         struct super_block *sb = sbi->sb;
91         int len = 0;
92
93         if (!sb->s_bdev->bd_part)
94                 return snprintf(buf, PAGE_SIZE, "0\n");
95
96         if (f2fs_sb_has_encrypt(sb))
97                 len += snprintf(buf, PAGE_SIZE - len, "%s",
98                                                 "encryption");
99         if (f2fs_sb_has_blkzoned(sb))
100                 len += snprintf(buf + len, PAGE_SIZE - len, "%s%s",
101                                 len ? ", " : "", "blkzoned");
102         if (f2fs_sb_has_extra_attr(sb))
103                 len += snprintf(buf + len, PAGE_SIZE - len, "%s%s",
104                                 len ? ", " : "", "extra_attr");
105         if (f2fs_sb_has_project_quota(sb))
106                 len += snprintf(buf + len, PAGE_SIZE - len, "%s%s",
107                                 len ? ", " : "", "projquota");
108         if (f2fs_sb_has_inode_chksum(sb))
109                 len += snprintf(buf + len, PAGE_SIZE - len, "%s%s",
110                                 len ? ", " : "", "inode_checksum");
111         if (f2fs_sb_has_flexible_inline_xattr(sb))
112                 len += snprintf(buf + len, PAGE_SIZE - len, "%s%s",
113                                 len ? ", " : "", "flexible_inline_xattr");
114         if (f2fs_sb_has_quota_ino(sb))
115                 len += snprintf(buf + len, PAGE_SIZE - len, "%s%s",
116                                 len ? ", " : "", "quota_ino");
117         if (f2fs_sb_has_inode_crtime(sb))
118                 len += snprintf(buf + len, PAGE_SIZE - len, "%s%s",
119                                 len ? ", " : "", "inode_crtime");
120         if (f2fs_sb_has_lost_found(sb))
121                 len += snprintf(buf + len, PAGE_SIZE - len, "%s%s",
122                                 len ? ", " : "", "lost_found");
123         len += snprintf(buf + len, PAGE_SIZE - len, "\n");
124         return len;
125 }
126
127 static ssize_t current_reserved_blocks_show(struct f2fs_attr *a,
128                                         struct f2fs_sb_info *sbi, char *buf)
129 {
130         return snprintf(buf, PAGE_SIZE, "%u\n", sbi->current_reserved_blocks);
131 }
132
133 static ssize_t f2fs_sbi_show(struct f2fs_attr *a,
134                         struct f2fs_sb_info *sbi, char *buf)
135 {
136         unsigned char *ptr = NULL;
137         unsigned int *ui;
138
139         ptr = __struct_ptr(sbi, a->struct_type);
140         if (!ptr)
141                 return -EINVAL;
142
143         if (!strcmp(a->attr.name, "extension_list")) {
144                 __u8 (*extlist)[F2FS_EXTENSION_LEN] =
145                                         sbi->raw_super->extension_list;
146                 int cold_count = le32_to_cpu(sbi->raw_super->extension_count);
147                 int hot_count = sbi->raw_super->hot_ext_count;
148                 int len = 0, i;
149
150                 len += snprintf(buf + len, PAGE_SIZE - len,
151                                                 "cold file extension:\n");
152                 for (i = 0; i < cold_count; i++)
153                         len += snprintf(buf + len, PAGE_SIZE - len, "%s\n",
154                                                                 extlist[i]);
155
156                 len += snprintf(buf + len, PAGE_SIZE - len,
157                                                 "hot file extension:\n");
158                 for (i = cold_count; i < cold_count + hot_count; i++)
159                         len += snprintf(buf + len, PAGE_SIZE - len, "%s\n",
160                                                                 extlist[i]);
161                 return len;
162         }
163
164         ui = (unsigned int *)(ptr + a->offset);
165
166         return snprintf(buf, PAGE_SIZE, "%u\n", *ui);
167 }
168
169 static ssize_t __sbi_store(struct f2fs_attr *a,
170                         struct f2fs_sb_info *sbi,
171                         const char *buf, size_t count)
172 {
173         unsigned char *ptr;
174         unsigned long t;
175         unsigned int *ui;
176         ssize_t ret;
177
178         ptr = __struct_ptr(sbi, a->struct_type);
179         if (!ptr)
180                 return -EINVAL;
181
182         if (!strcmp(a->attr.name, "extension_list")) {
183                 const char *name = strim((char *)buf);
184                 bool set = true, hot;
185
186                 if (!strncmp(name, "[h]", 3))
187                         hot = true;
188                 else if (!strncmp(name, "[c]", 3))
189                         hot = false;
190                 else
191                         return -EINVAL;
192
193                 name += 3;
194
195                 if (*name == '!') {
196                         name++;
197                         set = false;
198                 }
199
200                 if (strlen(name) >= F2FS_EXTENSION_LEN)
201                         return -EINVAL;
202
203                 down_write(&sbi->sb_lock);
204
205                 ret = f2fs_update_extension_list(sbi, name, hot, set);
206                 if (ret)
207                         goto out;
208
209                 ret = f2fs_commit_super(sbi, false);
210                 if (ret)
211                         f2fs_update_extension_list(sbi, name, hot, !set);
212 out:
213                 up_write(&sbi->sb_lock);
214                 return ret ? ret : count;
215         }
216
217         ui = (unsigned int *)(ptr + a->offset);
218
219         ret = kstrtoul(skip_spaces(buf), 0, &t);
220         if (ret < 0)
221                 return ret;
222 #ifdef CONFIG_F2FS_FAULT_INJECTION
223         if (a->struct_type == FAULT_INFO_TYPE && t >= (1 << FAULT_MAX))
224                 return -EINVAL;
225 #endif
226         if (a->struct_type == RESERVED_BLOCKS) {
227                 spin_lock(&sbi->stat_lock);
228                 if (t > (unsigned long)(sbi->user_block_count -
229                                 F2FS_OPTION(sbi).root_reserved_blocks)) {
230                         spin_unlock(&sbi->stat_lock);
231                         return -EINVAL;
232                 }
233                 *ui = t;
234                 sbi->current_reserved_blocks = min(sbi->reserved_blocks,
235                                 sbi->user_block_count - valid_user_blocks(sbi));
236                 spin_unlock(&sbi->stat_lock);
237                 return count;
238         }
239
240         if (!strcmp(a->attr.name, "discard_granularity")) {
241                 if (t == 0 || t > MAX_PLIST_NUM)
242                         return -EINVAL;
243                 if (t == *ui)
244                         return count;
245                 *ui = t;
246                 return count;
247         }
248
249         if (!strcmp(a->attr.name, "trim_sections"))
250                 return -EINVAL;
251
252         if (!strcmp(a->attr.name, "gc_urgent")) {
253                 if (t >= 1) {
254                         sbi->gc_mode = GC_URGENT;
255                         if (sbi->gc_thread) {
256                                 sbi->gc_thread->gc_wake = 1;
257                                 wake_up_interruptible_all(
258                                         &sbi->gc_thread->gc_wait_queue_head);
259                                 wake_up_discard_thread(sbi, true);
260                         }
261                 } else {
262                         sbi->gc_mode = GC_NORMAL;
263                 }
264                 return count;
265         }
266         if (!strcmp(a->attr.name, "gc_idle")) {
267                 if (t == GC_IDLE_CB)
268                         sbi->gc_mode = GC_IDLE_CB;
269                 else if (t == GC_IDLE_GREEDY)
270                         sbi->gc_mode = GC_IDLE_GREEDY;
271                 else
272                         sbi->gc_mode = GC_NORMAL;
273                 return count;
274         }
275
276
277         if (!strcmp(a->attr.name, "iostat_enable")) {
278                 sbi->iostat_enable = !!t;
279                 if (!sbi->iostat_enable)
280                         f2fs_reset_iostat(sbi);
281                 return count;
282         }
283
284         *ui = (unsigned int)t;
285
286         return count;
287 }
288
289 static ssize_t f2fs_sbi_store(struct f2fs_attr *a,
290                         struct f2fs_sb_info *sbi,
291                         const char *buf, size_t count)
292 {
293         ssize_t ret;
294         bool gc_entry = (!strcmp(a->attr.name, "gc_urgent") ||
295                                         a->struct_type == GC_THREAD);
296
297         if (gc_entry) {
298                 if (!down_read_trylock(&sbi->sb->s_umount))
299                         return -EAGAIN;
300         }
301         ret = __sbi_store(a, sbi, buf, count);
302         if (gc_entry)
303                 up_read(&sbi->sb->s_umount);
304
305         return ret;
306 }
307
308 static ssize_t f2fs_attr_show(struct kobject *kobj,
309                                 struct attribute *attr, char *buf)
310 {
311         struct f2fs_sb_info *sbi = container_of(kobj, struct f2fs_sb_info,
312                                                                 s_kobj);
313         struct f2fs_attr *a = container_of(attr, struct f2fs_attr, attr);
314
315         return a->show ? a->show(a, sbi, buf) : 0;
316 }
317
318 static ssize_t f2fs_attr_store(struct kobject *kobj, struct attribute *attr,
319                                                 const char *buf, size_t len)
320 {
321         struct f2fs_sb_info *sbi = container_of(kobj, struct f2fs_sb_info,
322                                                                         s_kobj);
323         struct f2fs_attr *a = container_of(attr, struct f2fs_attr, attr);
324
325         return a->store ? a->store(a, sbi, buf, len) : 0;
326 }
327
328 static void f2fs_sb_release(struct kobject *kobj)
329 {
330         struct f2fs_sb_info *sbi = container_of(kobj, struct f2fs_sb_info,
331                                                                 s_kobj);
332         complete(&sbi->s_kobj_unregister);
333 }
334
335 enum feat_id {
336         FEAT_CRYPTO = 0,
337         FEAT_BLKZONED,
338         FEAT_ATOMIC_WRITE,
339         FEAT_EXTRA_ATTR,
340         FEAT_PROJECT_QUOTA,
341         FEAT_INODE_CHECKSUM,
342         FEAT_FLEXIBLE_INLINE_XATTR,
343         FEAT_QUOTA_INO,
344         FEAT_INODE_CRTIME,
345         FEAT_LOST_FOUND,
346 };
347
348 static ssize_t f2fs_feature_show(struct f2fs_attr *a,
349                 struct f2fs_sb_info *sbi, char *buf)
350 {
351         switch (a->id) {
352         case FEAT_CRYPTO:
353         case FEAT_BLKZONED:
354         case FEAT_ATOMIC_WRITE:
355         case FEAT_EXTRA_ATTR:
356         case FEAT_PROJECT_QUOTA:
357         case FEAT_INODE_CHECKSUM:
358         case FEAT_FLEXIBLE_INLINE_XATTR:
359         case FEAT_QUOTA_INO:
360         case FEAT_INODE_CRTIME:
361         case FEAT_LOST_FOUND:
362                 return snprintf(buf, PAGE_SIZE, "supported\n");
363         }
364         return 0;
365 }
366
367 #define F2FS_ATTR_OFFSET(_struct_type, _name, _mode, _show, _store, _offset) \
368 static struct f2fs_attr f2fs_attr_##_name = {                   \
369         .attr = {.name = __stringify(_name), .mode = _mode },   \
370         .show   = _show,                                        \
371         .store  = _store,                                       \
372         .struct_type = _struct_type,                            \
373         .offset = _offset                                       \
374 }
375
376 #define F2FS_RW_ATTR(struct_type, struct_name, name, elname)    \
377         F2FS_ATTR_OFFSET(struct_type, name, 0644,               \
378                 f2fs_sbi_show, f2fs_sbi_store,                  \
379                 offsetof(struct struct_name, elname))
380
381 #define F2FS_GENERAL_RO_ATTR(name) \
382 static struct f2fs_attr f2fs_attr_##name = __ATTR(name, 0444, name##_show, NULL)
383
384 #define F2FS_FEATURE_RO_ATTR(_name, _id)                        \
385 static struct f2fs_attr f2fs_attr_##_name = {                   \
386         .attr = {.name = __stringify(_name), .mode = 0444 },    \
387         .show   = f2fs_feature_show,                            \
388         .id     = _id,                                          \
389 }
390
391 F2FS_RW_ATTR(GC_THREAD, f2fs_gc_kthread, gc_urgent_sleep_time,
392                                                         urgent_sleep_time);
393 F2FS_RW_ATTR(GC_THREAD, f2fs_gc_kthread, gc_min_sleep_time, min_sleep_time);
394 F2FS_RW_ATTR(GC_THREAD, f2fs_gc_kthread, gc_max_sleep_time, max_sleep_time);
395 F2FS_RW_ATTR(GC_THREAD, f2fs_gc_kthread, gc_no_gc_sleep_time, no_gc_sleep_time);
396 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, gc_idle, gc_mode);
397 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, gc_urgent, gc_mode);
398 F2FS_RW_ATTR(SM_INFO, f2fs_sm_info, reclaim_segments, rec_prefree_segments);
399 F2FS_RW_ATTR(DCC_INFO, discard_cmd_control, max_small_discards, max_discards);
400 F2FS_RW_ATTR(DCC_INFO, discard_cmd_control, discard_granularity, discard_granularity);
401 F2FS_RW_ATTR(RESERVED_BLOCKS, f2fs_sb_info, reserved_blocks, reserved_blocks);
402 F2FS_RW_ATTR(SM_INFO, f2fs_sm_info, batched_trim_sections, trim_sections);
403 F2FS_RW_ATTR(SM_INFO, f2fs_sm_info, ipu_policy, ipu_policy);
404 F2FS_RW_ATTR(SM_INFO, f2fs_sm_info, min_ipu_util, min_ipu_util);
405 F2FS_RW_ATTR(SM_INFO, f2fs_sm_info, min_fsync_blocks, min_fsync_blocks);
406 F2FS_RW_ATTR(SM_INFO, f2fs_sm_info, min_seq_blocks, min_seq_blocks);
407 F2FS_RW_ATTR(SM_INFO, f2fs_sm_info, min_hot_blocks, min_hot_blocks);
408 F2FS_RW_ATTR(SM_INFO, f2fs_sm_info, min_ssr_sections, min_ssr_sections);
409 F2FS_RW_ATTR(NM_INFO, f2fs_nm_info, ram_thresh, ram_thresh);
410 F2FS_RW_ATTR(NM_INFO, f2fs_nm_info, ra_nid_pages, ra_nid_pages);
411 F2FS_RW_ATTR(NM_INFO, f2fs_nm_info, dirty_nats_ratio, dirty_nats_ratio);
412 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, max_victim_search, max_victim_search);
413 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, dir_level, dir_level);
414 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, cp_interval, interval_time[CP_TIME]);
415 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, idle_interval, interval_time[REQ_TIME]);
416 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, iostat_enable, iostat_enable);
417 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, readdir_ra, readdir_ra);
418 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, gc_pin_file_thresh, gc_pin_file_threshold);
419 F2FS_RW_ATTR(F2FS_SBI, f2fs_super_block, extension_list, extension_list);
420 #ifdef CONFIG_F2FS_FAULT_INJECTION
421 F2FS_RW_ATTR(FAULT_INFO_RATE, f2fs_fault_info, inject_rate, inject_rate);
422 F2FS_RW_ATTR(FAULT_INFO_TYPE, f2fs_fault_info, inject_type, inject_type);
423 #endif
424 F2FS_GENERAL_RO_ATTR(dirty_segments);
425 F2FS_GENERAL_RO_ATTR(lifetime_write_kbytes);
426 F2FS_GENERAL_RO_ATTR(features);
427 F2FS_GENERAL_RO_ATTR(current_reserved_blocks);
428
429 #ifdef CONFIG_F2FS_FS_ENCRYPTION
430 F2FS_FEATURE_RO_ATTR(encryption, FEAT_CRYPTO);
431 #endif
432 #ifdef CONFIG_BLK_DEV_ZONED
433 F2FS_FEATURE_RO_ATTR(block_zoned, FEAT_BLKZONED);
434 #endif
435 F2FS_FEATURE_RO_ATTR(atomic_write, FEAT_ATOMIC_WRITE);
436 F2FS_FEATURE_RO_ATTR(extra_attr, FEAT_EXTRA_ATTR);
437 F2FS_FEATURE_RO_ATTR(project_quota, FEAT_PROJECT_QUOTA);
438 F2FS_FEATURE_RO_ATTR(inode_checksum, FEAT_INODE_CHECKSUM);
439 F2FS_FEATURE_RO_ATTR(flexible_inline_xattr, FEAT_FLEXIBLE_INLINE_XATTR);
440 F2FS_FEATURE_RO_ATTR(quota_ino, FEAT_QUOTA_INO);
441 F2FS_FEATURE_RO_ATTR(inode_crtime, FEAT_INODE_CRTIME);
442 F2FS_FEATURE_RO_ATTR(lost_found, FEAT_LOST_FOUND);
443
444 #define ATTR_LIST(name) (&f2fs_attr_##name.attr)
445 static struct attribute *f2fs_attrs[] = {
446         ATTR_LIST(gc_urgent_sleep_time),
447         ATTR_LIST(gc_min_sleep_time),
448         ATTR_LIST(gc_max_sleep_time),
449         ATTR_LIST(gc_no_gc_sleep_time),
450         ATTR_LIST(gc_idle),
451         ATTR_LIST(gc_urgent),
452         ATTR_LIST(reclaim_segments),
453         ATTR_LIST(max_small_discards),
454         ATTR_LIST(discard_granularity),
455         ATTR_LIST(batched_trim_sections),
456         ATTR_LIST(ipu_policy),
457         ATTR_LIST(min_ipu_util),
458         ATTR_LIST(min_fsync_blocks),
459         ATTR_LIST(min_seq_blocks),
460         ATTR_LIST(min_hot_blocks),
461         ATTR_LIST(min_ssr_sections),
462         ATTR_LIST(max_victim_search),
463         ATTR_LIST(dir_level),
464         ATTR_LIST(ram_thresh),
465         ATTR_LIST(ra_nid_pages),
466         ATTR_LIST(dirty_nats_ratio),
467         ATTR_LIST(cp_interval),
468         ATTR_LIST(idle_interval),
469         ATTR_LIST(iostat_enable),
470         ATTR_LIST(readdir_ra),
471         ATTR_LIST(gc_pin_file_thresh),
472         ATTR_LIST(extension_list),
473 #ifdef CONFIG_F2FS_FAULT_INJECTION
474         ATTR_LIST(inject_rate),
475         ATTR_LIST(inject_type),
476 #endif
477         ATTR_LIST(dirty_segments),
478         ATTR_LIST(lifetime_write_kbytes),
479         ATTR_LIST(features),
480         ATTR_LIST(reserved_blocks),
481         ATTR_LIST(current_reserved_blocks),
482         NULL,
483 };
484
485 static struct attribute *f2fs_feat_attrs[] = {
486 #ifdef CONFIG_F2FS_FS_ENCRYPTION
487         ATTR_LIST(encryption),
488 #endif
489 #ifdef CONFIG_BLK_DEV_ZONED
490         ATTR_LIST(block_zoned),
491 #endif
492         ATTR_LIST(atomic_write),
493         ATTR_LIST(extra_attr),
494         ATTR_LIST(project_quota),
495         ATTR_LIST(inode_checksum),
496         ATTR_LIST(flexible_inline_xattr),
497         ATTR_LIST(quota_ino),
498         ATTR_LIST(inode_crtime),
499         ATTR_LIST(lost_found),
500         NULL,
501 };
502
503 static const struct sysfs_ops f2fs_attr_ops = {
504         .show   = f2fs_attr_show,
505         .store  = f2fs_attr_store,
506 };
507
508 static struct kobj_type f2fs_sb_ktype = {
509         .default_attrs  = f2fs_attrs,
510         .sysfs_ops      = &f2fs_attr_ops,
511         .release        = f2fs_sb_release,
512 };
513
514 static struct kobj_type f2fs_ktype = {
515         .sysfs_ops      = &f2fs_attr_ops,
516 };
517
518 static struct kset f2fs_kset = {
519         .kobj   = {.ktype = &f2fs_ktype},
520 };
521
522 static struct kobj_type f2fs_feat_ktype = {
523         .default_attrs  = f2fs_feat_attrs,
524         .sysfs_ops      = &f2fs_attr_ops,
525 };
526
527 static struct kobject f2fs_feat = {
528         .kset   = &f2fs_kset,
529 };
530
531 static int __maybe_unused segment_info_seq_show(struct seq_file *seq,
532                                                 void *offset)
533 {
534         struct super_block *sb = seq->private;
535         struct f2fs_sb_info *sbi = F2FS_SB(sb);
536         unsigned int total_segs =
537                         le32_to_cpu(sbi->raw_super->segment_count_main);
538         int i;
539
540         seq_puts(seq, "format: segment_type|valid_blocks\n"
541                 "segment_type(0:HD, 1:WD, 2:CD, 3:HN, 4:WN, 5:CN)\n");
542
543         for (i = 0; i < total_segs; i++) {
544                 struct seg_entry *se = get_seg_entry(sbi, i);
545
546                 if ((i % 10) == 0)
547                         seq_printf(seq, "%-10d", i);
548                 seq_printf(seq, "%d|%-3u", se->type,
549                                         get_valid_blocks(sbi, i, false));
550                 if ((i % 10) == 9 || i == (total_segs - 1))
551                         seq_putc(seq, '\n');
552                 else
553                         seq_putc(seq, ' ');
554         }
555
556         return 0;
557 }
558
559 static int __maybe_unused segment_bits_seq_show(struct seq_file *seq,
560                                                 void *offset)
561 {
562         struct super_block *sb = seq->private;
563         struct f2fs_sb_info *sbi = F2FS_SB(sb);
564         unsigned int total_segs =
565                         le32_to_cpu(sbi->raw_super->segment_count_main);
566         int i, j;
567
568         seq_puts(seq, "format: segment_type|valid_blocks|bitmaps\n"
569                 "segment_type(0:HD, 1:WD, 2:CD, 3:HN, 4:WN, 5:CN)\n");
570
571         for (i = 0; i < total_segs; i++) {
572                 struct seg_entry *se = get_seg_entry(sbi, i);
573
574                 seq_printf(seq, "%-10d", i);
575                 seq_printf(seq, "%d|%-3u|", se->type,
576                                         get_valid_blocks(sbi, i, false));
577                 for (j = 0; j < SIT_VBLOCK_MAP_SIZE; j++)
578                         seq_printf(seq, " %.2x", se->cur_valid_map[j]);
579                 seq_putc(seq, '\n');
580         }
581         return 0;
582 }
583
584 static int __maybe_unused iostat_info_seq_show(struct seq_file *seq,
585                                                void *offset)
586 {
587         struct super_block *sb = seq->private;
588         struct f2fs_sb_info *sbi = F2FS_SB(sb);
589         time64_t now = ktime_get_real_seconds();
590
591         if (!sbi->iostat_enable)
592                 return 0;
593
594         seq_printf(seq, "time:          %-16llu\n", now);
595
596         /* print app IOs */
597         seq_printf(seq, "app buffered:  %-16llu\n",
598                                 sbi->write_iostat[APP_BUFFERED_IO]);
599         seq_printf(seq, "app direct:    %-16llu\n",
600                                 sbi->write_iostat[APP_DIRECT_IO]);
601         seq_printf(seq, "app mapped:    %-16llu\n",
602                                 sbi->write_iostat[APP_MAPPED_IO]);
603
604         /* print fs IOs */
605         seq_printf(seq, "fs data:       %-16llu\n",
606                                 sbi->write_iostat[FS_DATA_IO]);
607         seq_printf(seq, "fs node:       %-16llu\n",
608                                 sbi->write_iostat[FS_NODE_IO]);
609         seq_printf(seq, "fs meta:       %-16llu\n",
610                                 sbi->write_iostat[FS_META_IO]);
611         seq_printf(seq, "fs gc data:    %-16llu\n",
612                                 sbi->write_iostat[FS_GC_DATA_IO]);
613         seq_printf(seq, "fs gc node:    %-16llu\n",
614                                 sbi->write_iostat[FS_GC_NODE_IO]);
615         seq_printf(seq, "fs cp data:    %-16llu\n",
616                                 sbi->write_iostat[FS_CP_DATA_IO]);
617         seq_printf(seq, "fs cp node:    %-16llu\n",
618                                 sbi->write_iostat[FS_CP_NODE_IO]);
619         seq_printf(seq, "fs cp meta:    %-16llu\n",
620                                 sbi->write_iostat[FS_CP_META_IO]);
621         seq_printf(seq, "fs discard:    %-16llu\n",
622                                 sbi->write_iostat[FS_DISCARD]);
623
624         return 0;
625 }
626
627 static int __maybe_unused victim_bits_seq_show(struct seq_file *seq,
628                                                 void *offset)
629 {
630         struct super_block *sb = seq->private;
631         struct f2fs_sb_info *sbi = F2FS_SB(sb);
632         struct dirty_seglist_info *dirty_i = DIRTY_I(sbi);
633         int i;
634
635         seq_puts(seq, "format: victim_secmap bitmaps\n");
636
637         for (i = 0; i < MAIN_SECS(sbi); i++) {
638                 if ((i % 10) == 0)
639                         seq_printf(seq, "%-10d", i);
640                 seq_printf(seq, "%d", test_bit(i, dirty_i->victim_secmap) ? 1 : 0);
641                 if ((i % 10) == 9 || i == (MAIN_SECS(sbi) - 1))
642                         seq_putc(seq, '\n');
643                 else
644                         seq_putc(seq, ' ');
645         }
646         return 0;
647 }
648
649 int __init f2fs_init_sysfs(void)
650 {
651         int ret;
652
653         kobject_set_name(&f2fs_kset.kobj, "f2fs");
654         f2fs_kset.kobj.parent = fs_kobj;
655         ret = kset_register(&f2fs_kset);
656         if (ret)
657                 return ret;
658
659         ret = kobject_init_and_add(&f2fs_feat, &f2fs_feat_ktype,
660                                    NULL, "features");
661         if (ret) {
662                 kobject_put(&f2fs_feat);
663                 kset_unregister(&f2fs_kset);
664         } else {
665                 f2fs_proc_root = proc_mkdir("fs/f2fs", NULL);
666         }
667         return ret;
668 }
669
670 void f2fs_exit_sysfs(void)
671 {
672         kobject_put(&f2fs_feat);
673         kset_unregister(&f2fs_kset);
674         remove_proc_entry("fs/f2fs", NULL);
675         f2fs_proc_root = NULL;
676 }
677
678 int f2fs_register_sysfs(struct f2fs_sb_info *sbi)
679 {
680         struct super_block *sb = sbi->sb;
681         int err;
682
683         sbi->s_kobj.kset = &f2fs_kset;
684         init_completion(&sbi->s_kobj_unregister);
685         err = kobject_init_and_add(&sbi->s_kobj, &f2fs_sb_ktype, NULL,
686                                 "%s", sb->s_id);
687         if (err) {
688                 kobject_put(&sbi->s_kobj);
689                 wait_for_completion(&sbi->s_kobj_unregister);
690                 return err;
691         }
692
693         if (f2fs_proc_root)
694                 sbi->s_proc = proc_mkdir(sb->s_id, f2fs_proc_root);
695
696         if (sbi->s_proc) {
697                 proc_create_single_data("segment_info", S_IRUGO, sbi->s_proc,
698                                 segment_info_seq_show, sb);
699                 proc_create_single_data("segment_bits", S_IRUGO, sbi->s_proc,
700                                 segment_bits_seq_show, sb);
701                 proc_create_single_data("iostat_info", S_IRUGO, sbi->s_proc,
702                                 iostat_info_seq_show, sb);
703                 proc_create_single_data("victim_bits", S_IRUGO, sbi->s_proc,
704                                 victim_bits_seq_show, sb);
705         }
706         return 0;
707 }
708
709 void f2fs_unregister_sysfs(struct f2fs_sb_info *sbi)
710 {
711         if (sbi->s_proc) {
712                 remove_proc_entry("iostat_info", sbi->s_proc);
713                 remove_proc_entry("segment_info", sbi->s_proc);
714                 remove_proc_entry("segment_bits", sbi->s_proc);
715                 remove_proc_entry("victim_bits", sbi->s_proc);
716                 remove_proc_entry(sbi->sb->s_id, f2fs_proc_root);
717         }
718         kobject_del(&sbi->s_kobj);
719         kobject_put(&sbi->s_kobj);
720         wait_for_completion(&sbi->s_kobj_unregister);
721 }