Merge tag 'leaks-5.1-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/tobin...
[sfrench/cifs-2.6.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
14 #include "f2fs.h"
15 #include "segment.h"
16 #include "gc.h"
17
18 static struct proc_dir_entry *f2fs_proc_root;
19
20 /* Sysfs support for f2fs */
21 enum {
22         GC_THREAD,      /* struct f2fs_gc_thread */
23         SM_INFO,        /* struct f2fs_sm_info */
24         DCC_INFO,       /* struct discard_cmd_control */
25         NM_INFO,        /* struct f2fs_nm_info */
26         F2FS_SBI,       /* struct f2fs_sb_info */
27 #ifdef CONFIG_F2FS_FAULT_INJECTION
28         FAULT_INFO_RATE,        /* struct f2fs_fault_info */
29         FAULT_INFO_TYPE,        /* struct f2fs_fault_info */
30 #endif
31         RESERVED_BLOCKS,        /* struct f2fs_sb_info */
32 };
33
34 struct f2fs_attr {
35         struct attribute attr;
36         ssize_t (*show)(struct f2fs_attr *, struct f2fs_sb_info *, char *);
37         ssize_t (*store)(struct f2fs_attr *, struct f2fs_sb_info *,
38                          const char *, size_t);
39         int struct_type;
40         int offset;
41         int id;
42 };
43
44 static unsigned char *__struct_ptr(struct f2fs_sb_info *sbi, int struct_type)
45 {
46         if (struct_type == GC_THREAD)
47                 return (unsigned char *)sbi->gc_thread;
48         else if (struct_type == SM_INFO)
49                 return (unsigned char *)SM_I(sbi);
50         else if (struct_type == DCC_INFO)
51                 return (unsigned char *)SM_I(sbi)->dcc_info;
52         else if (struct_type == NM_INFO)
53                 return (unsigned char *)NM_I(sbi);
54         else if (struct_type == F2FS_SBI || struct_type == RESERVED_BLOCKS)
55                 return (unsigned char *)sbi;
56 #ifdef CONFIG_F2FS_FAULT_INJECTION
57         else if (struct_type == FAULT_INFO_RATE ||
58                                         struct_type == FAULT_INFO_TYPE)
59                 return (unsigned char *)&F2FS_OPTION(sbi).fault_info;
60 #endif
61         return NULL;
62 }
63
64 static ssize_t dirty_segments_show(struct f2fs_attr *a,
65                 struct f2fs_sb_info *sbi, char *buf)
66 {
67         return snprintf(buf, PAGE_SIZE, "%llu\n",
68                 (unsigned long long)(dirty_segments(sbi)));
69 }
70
71 static ssize_t lifetime_write_kbytes_show(struct f2fs_attr *a,
72                 struct f2fs_sb_info *sbi, char *buf)
73 {
74         struct super_block *sb = sbi->sb;
75
76         if (!sb->s_bdev->bd_part)
77                 return snprintf(buf, PAGE_SIZE, "0\n");
78
79         return snprintf(buf, PAGE_SIZE, "%llu\n",
80                 (unsigned long long)(sbi->kbytes_written +
81                         BD_PART_WRITTEN(sbi)));
82 }
83
84 static ssize_t features_show(struct f2fs_attr *a,
85                 struct f2fs_sb_info *sbi, char *buf)
86 {
87         struct super_block *sb = sbi->sb;
88         int len = 0;
89
90         if (!sb->s_bdev->bd_part)
91                 return snprintf(buf, PAGE_SIZE, "0\n");
92
93         if (f2fs_sb_has_encrypt(sbi))
94                 len += snprintf(buf, PAGE_SIZE - len, "%s",
95                                                 "encryption");
96         if (f2fs_sb_has_blkzoned(sbi))
97                 len += snprintf(buf + len, PAGE_SIZE - len, "%s%s",
98                                 len ? ", " : "", "blkzoned");
99         if (f2fs_sb_has_extra_attr(sbi))
100                 len += snprintf(buf + len, PAGE_SIZE - len, "%s%s",
101                                 len ? ", " : "", "extra_attr");
102         if (f2fs_sb_has_project_quota(sbi))
103                 len += snprintf(buf + len, PAGE_SIZE - len, "%s%s",
104                                 len ? ", " : "", "projquota");
105         if (f2fs_sb_has_inode_chksum(sbi))
106                 len += snprintf(buf + len, PAGE_SIZE - len, "%s%s",
107                                 len ? ", " : "", "inode_checksum");
108         if (f2fs_sb_has_flexible_inline_xattr(sbi))
109                 len += snprintf(buf + len, PAGE_SIZE - len, "%s%s",
110                                 len ? ", " : "", "flexible_inline_xattr");
111         if (f2fs_sb_has_quota_ino(sbi))
112                 len += snprintf(buf + len, PAGE_SIZE - len, "%s%s",
113                                 len ? ", " : "", "quota_ino");
114         if (f2fs_sb_has_inode_crtime(sbi))
115                 len += snprintf(buf + len, PAGE_SIZE - len, "%s%s",
116                                 len ? ", " : "", "inode_crtime");
117         if (f2fs_sb_has_lost_found(sbi))
118                 len += snprintf(buf + len, PAGE_SIZE - len, "%s%s",
119                                 len ? ", " : "", "lost_found");
120         if (f2fs_sb_has_sb_chksum(sbi))
121                 len += snprintf(buf + len, PAGE_SIZE - len, "%s%s",
122                                 len ? ", " : "", "sb_checksum");
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, "migration_granularity")) {
250                 if (t == 0 || t > sbi->segs_per_sec)
251                         return -EINVAL;
252         }
253
254         if (!strcmp(a->attr.name, "trim_sections"))
255                 return -EINVAL;
256
257         if (!strcmp(a->attr.name, "gc_urgent")) {
258                 if (t >= 1) {
259                         sbi->gc_mode = GC_URGENT;
260                         if (sbi->gc_thread) {
261                                 sbi->gc_thread->gc_wake = 1;
262                                 wake_up_interruptible_all(
263                                         &sbi->gc_thread->gc_wait_queue_head);
264                                 wake_up_discard_thread(sbi, true);
265                         }
266                 } else {
267                         sbi->gc_mode = GC_NORMAL;
268                 }
269                 return count;
270         }
271         if (!strcmp(a->attr.name, "gc_idle")) {
272                 if (t == GC_IDLE_CB)
273                         sbi->gc_mode = GC_IDLE_CB;
274                 else if (t == GC_IDLE_GREEDY)
275                         sbi->gc_mode = GC_IDLE_GREEDY;
276                 else
277                         sbi->gc_mode = GC_NORMAL;
278                 return count;
279         }
280
281         *ui = t;
282
283         if (!strcmp(a->attr.name, "iostat_enable") && *ui == 0)
284                 f2fs_reset_iostat(sbi);
285         return count;
286 }
287
288 static ssize_t f2fs_sbi_store(struct f2fs_attr *a,
289                         struct f2fs_sb_info *sbi,
290                         const char *buf, size_t count)
291 {
292         ssize_t ret;
293         bool gc_entry = (!strcmp(a->attr.name, "gc_urgent") ||
294                                         a->struct_type == GC_THREAD);
295
296         if (gc_entry) {
297                 if (!down_read_trylock(&sbi->sb->s_umount))
298                         return -EAGAIN;
299         }
300         ret = __sbi_store(a, sbi, buf, count);
301         if (gc_entry)
302                 up_read(&sbi->sb->s_umount);
303
304         return ret;
305 }
306
307 static ssize_t f2fs_attr_show(struct kobject *kobj,
308                                 struct attribute *attr, char *buf)
309 {
310         struct f2fs_sb_info *sbi = container_of(kobj, struct f2fs_sb_info,
311                                                                 s_kobj);
312         struct f2fs_attr *a = container_of(attr, struct f2fs_attr, attr);
313
314         return a->show ? a->show(a, sbi, buf) : 0;
315 }
316
317 static ssize_t f2fs_attr_store(struct kobject *kobj, struct attribute *attr,
318                                                 const char *buf, size_t len)
319 {
320         struct f2fs_sb_info *sbi = container_of(kobj, struct f2fs_sb_info,
321                                                                         s_kobj);
322         struct f2fs_attr *a = container_of(attr, struct f2fs_attr, attr);
323
324         return a->store ? a->store(a, sbi, buf, len) : 0;
325 }
326
327 static void f2fs_sb_release(struct kobject *kobj)
328 {
329         struct f2fs_sb_info *sbi = container_of(kobj, struct f2fs_sb_info,
330                                                                 s_kobj);
331         complete(&sbi->s_kobj_unregister);
332 }
333
334 enum feat_id {
335         FEAT_CRYPTO = 0,
336         FEAT_BLKZONED,
337         FEAT_ATOMIC_WRITE,
338         FEAT_EXTRA_ATTR,
339         FEAT_PROJECT_QUOTA,
340         FEAT_INODE_CHECKSUM,
341         FEAT_FLEXIBLE_INLINE_XATTR,
342         FEAT_QUOTA_INO,
343         FEAT_INODE_CRTIME,
344         FEAT_LOST_FOUND,
345         FEAT_SB_CHECKSUM,
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         case FEAT_SB_CHECKSUM:
363                 return snprintf(buf, PAGE_SIZE, "supported\n");
364         }
365         return 0;
366 }
367
368 #define F2FS_ATTR_OFFSET(_struct_type, _name, _mode, _show, _store, _offset) \
369 static struct f2fs_attr f2fs_attr_##_name = {                   \
370         .attr = {.name = __stringify(_name), .mode = _mode },   \
371         .show   = _show,                                        \
372         .store  = _store,                                       \
373         .struct_type = _struct_type,                            \
374         .offset = _offset                                       \
375 }
376
377 #define F2FS_RW_ATTR(struct_type, struct_name, name, elname)    \
378         F2FS_ATTR_OFFSET(struct_type, name, 0644,               \
379                 f2fs_sbi_show, f2fs_sbi_store,                  \
380                 offsetof(struct struct_name, elname))
381
382 #define F2FS_GENERAL_RO_ATTR(name) \
383 static struct f2fs_attr f2fs_attr_##name = __ATTR(name, 0444, name##_show, NULL)
384
385 #define F2FS_FEATURE_RO_ATTR(_name, _id)                        \
386 static struct f2fs_attr f2fs_attr_##_name = {                   \
387         .attr = {.name = __stringify(_name), .mode = 0444 },    \
388         .show   = f2fs_feature_show,                            \
389         .id     = _id,                                          \
390 }
391
392 F2FS_RW_ATTR(GC_THREAD, f2fs_gc_kthread, gc_urgent_sleep_time,
393                                                         urgent_sleep_time);
394 F2FS_RW_ATTR(GC_THREAD, f2fs_gc_kthread, gc_min_sleep_time, min_sleep_time);
395 F2FS_RW_ATTR(GC_THREAD, f2fs_gc_kthread, gc_max_sleep_time, max_sleep_time);
396 F2FS_RW_ATTR(GC_THREAD, f2fs_gc_kthread, gc_no_gc_sleep_time, no_gc_sleep_time);
397 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, gc_idle, gc_mode);
398 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, gc_urgent, gc_mode);
399 F2FS_RW_ATTR(SM_INFO, f2fs_sm_info, reclaim_segments, rec_prefree_segments);
400 F2FS_RW_ATTR(DCC_INFO, discard_cmd_control, max_small_discards, max_discards);
401 F2FS_RW_ATTR(DCC_INFO, discard_cmd_control, discard_granularity, discard_granularity);
402 F2FS_RW_ATTR(RESERVED_BLOCKS, f2fs_sb_info, reserved_blocks, reserved_blocks);
403 F2FS_RW_ATTR(SM_INFO, f2fs_sm_info, batched_trim_sections, trim_sections);
404 F2FS_RW_ATTR(SM_INFO, f2fs_sm_info, ipu_policy, ipu_policy);
405 F2FS_RW_ATTR(SM_INFO, f2fs_sm_info, min_ipu_util, min_ipu_util);
406 F2FS_RW_ATTR(SM_INFO, f2fs_sm_info, min_fsync_blocks, min_fsync_blocks);
407 F2FS_RW_ATTR(SM_INFO, f2fs_sm_info, min_seq_blocks, min_seq_blocks);
408 F2FS_RW_ATTR(SM_INFO, f2fs_sm_info, min_hot_blocks, min_hot_blocks);
409 F2FS_RW_ATTR(SM_INFO, f2fs_sm_info, min_ssr_sections, min_ssr_sections);
410 F2FS_RW_ATTR(NM_INFO, f2fs_nm_info, ram_thresh, ram_thresh);
411 F2FS_RW_ATTR(NM_INFO, f2fs_nm_info, ra_nid_pages, ra_nid_pages);
412 F2FS_RW_ATTR(NM_INFO, f2fs_nm_info, dirty_nats_ratio, dirty_nats_ratio);
413 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, max_victim_search, max_victim_search);
414 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, migration_granularity, migration_granularity);
415 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, dir_level, dir_level);
416 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, cp_interval, interval_time[CP_TIME]);
417 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, idle_interval, interval_time[REQ_TIME]);
418 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, discard_idle_interval,
419                                         interval_time[DISCARD_TIME]);
420 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, gc_idle_interval, interval_time[GC_TIME]);
421 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, iostat_enable, iostat_enable);
422 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, readdir_ra, readdir_ra);
423 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, gc_pin_file_thresh, gc_pin_file_threshold);
424 F2FS_RW_ATTR(F2FS_SBI, f2fs_super_block, extension_list, extension_list);
425 #ifdef CONFIG_F2FS_FAULT_INJECTION
426 F2FS_RW_ATTR(FAULT_INFO_RATE, f2fs_fault_info, inject_rate, inject_rate);
427 F2FS_RW_ATTR(FAULT_INFO_TYPE, f2fs_fault_info, inject_type, inject_type);
428 #endif
429 F2FS_GENERAL_RO_ATTR(dirty_segments);
430 F2FS_GENERAL_RO_ATTR(lifetime_write_kbytes);
431 F2FS_GENERAL_RO_ATTR(features);
432 F2FS_GENERAL_RO_ATTR(current_reserved_blocks);
433
434 #ifdef CONFIG_F2FS_FS_ENCRYPTION
435 F2FS_FEATURE_RO_ATTR(encryption, FEAT_CRYPTO);
436 #endif
437 #ifdef CONFIG_BLK_DEV_ZONED
438 F2FS_FEATURE_RO_ATTR(block_zoned, FEAT_BLKZONED);
439 #endif
440 F2FS_FEATURE_RO_ATTR(atomic_write, FEAT_ATOMIC_WRITE);
441 F2FS_FEATURE_RO_ATTR(extra_attr, FEAT_EXTRA_ATTR);
442 F2FS_FEATURE_RO_ATTR(project_quota, FEAT_PROJECT_QUOTA);
443 F2FS_FEATURE_RO_ATTR(inode_checksum, FEAT_INODE_CHECKSUM);
444 F2FS_FEATURE_RO_ATTR(flexible_inline_xattr, FEAT_FLEXIBLE_INLINE_XATTR);
445 F2FS_FEATURE_RO_ATTR(quota_ino, FEAT_QUOTA_INO);
446 F2FS_FEATURE_RO_ATTR(inode_crtime, FEAT_INODE_CRTIME);
447 F2FS_FEATURE_RO_ATTR(lost_found, FEAT_LOST_FOUND);
448 F2FS_FEATURE_RO_ATTR(sb_checksum, FEAT_SB_CHECKSUM);
449
450 #define ATTR_LIST(name) (&f2fs_attr_##name.attr)
451 static struct attribute *f2fs_attrs[] = {
452         ATTR_LIST(gc_urgent_sleep_time),
453         ATTR_LIST(gc_min_sleep_time),
454         ATTR_LIST(gc_max_sleep_time),
455         ATTR_LIST(gc_no_gc_sleep_time),
456         ATTR_LIST(gc_idle),
457         ATTR_LIST(gc_urgent),
458         ATTR_LIST(reclaim_segments),
459         ATTR_LIST(max_small_discards),
460         ATTR_LIST(discard_granularity),
461         ATTR_LIST(batched_trim_sections),
462         ATTR_LIST(ipu_policy),
463         ATTR_LIST(min_ipu_util),
464         ATTR_LIST(min_fsync_blocks),
465         ATTR_LIST(min_seq_blocks),
466         ATTR_LIST(min_hot_blocks),
467         ATTR_LIST(min_ssr_sections),
468         ATTR_LIST(max_victim_search),
469         ATTR_LIST(migration_granularity),
470         ATTR_LIST(dir_level),
471         ATTR_LIST(ram_thresh),
472         ATTR_LIST(ra_nid_pages),
473         ATTR_LIST(dirty_nats_ratio),
474         ATTR_LIST(cp_interval),
475         ATTR_LIST(idle_interval),
476         ATTR_LIST(discard_idle_interval),
477         ATTR_LIST(gc_idle_interval),
478         ATTR_LIST(iostat_enable),
479         ATTR_LIST(readdir_ra),
480         ATTR_LIST(gc_pin_file_thresh),
481         ATTR_LIST(extension_list),
482 #ifdef CONFIG_F2FS_FAULT_INJECTION
483         ATTR_LIST(inject_rate),
484         ATTR_LIST(inject_type),
485 #endif
486         ATTR_LIST(dirty_segments),
487         ATTR_LIST(lifetime_write_kbytes),
488         ATTR_LIST(features),
489         ATTR_LIST(reserved_blocks),
490         ATTR_LIST(current_reserved_blocks),
491         NULL,
492 };
493
494 static struct attribute *f2fs_feat_attrs[] = {
495 #ifdef CONFIG_F2FS_FS_ENCRYPTION
496         ATTR_LIST(encryption),
497 #endif
498 #ifdef CONFIG_BLK_DEV_ZONED
499         ATTR_LIST(block_zoned),
500 #endif
501         ATTR_LIST(atomic_write),
502         ATTR_LIST(extra_attr),
503         ATTR_LIST(project_quota),
504         ATTR_LIST(inode_checksum),
505         ATTR_LIST(flexible_inline_xattr),
506         ATTR_LIST(quota_ino),
507         ATTR_LIST(inode_crtime),
508         ATTR_LIST(lost_found),
509         ATTR_LIST(sb_checksum),
510         NULL,
511 };
512
513 static const struct sysfs_ops f2fs_attr_ops = {
514         .show   = f2fs_attr_show,
515         .store  = f2fs_attr_store,
516 };
517
518 static struct kobj_type f2fs_sb_ktype = {
519         .default_attrs  = f2fs_attrs,
520         .sysfs_ops      = &f2fs_attr_ops,
521         .release        = f2fs_sb_release,
522 };
523
524 static struct kobj_type f2fs_ktype = {
525         .sysfs_ops      = &f2fs_attr_ops,
526 };
527
528 static struct kset f2fs_kset = {
529         .kobj   = {.ktype = &f2fs_ktype},
530 };
531
532 static struct kobj_type f2fs_feat_ktype = {
533         .default_attrs  = f2fs_feat_attrs,
534         .sysfs_ops      = &f2fs_attr_ops,
535 };
536
537 static struct kobject f2fs_feat = {
538         .kset   = &f2fs_kset,
539 };
540
541 static int __maybe_unused segment_info_seq_show(struct seq_file *seq,
542                                                 void *offset)
543 {
544         struct super_block *sb = seq->private;
545         struct f2fs_sb_info *sbi = F2FS_SB(sb);
546         unsigned int total_segs =
547                         le32_to_cpu(sbi->raw_super->segment_count_main);
548         int i;
549
550         seq_puts(seq, "format: segment_type|valid_blocks\n"
551                 "segment_type(0:HD, 1:WD, 2:CD, 3:HN, 4:WN, 5:CN)\n");
552
553         for (i = 0; i < total_segs; i++) {
554                 struct seg_entry *se = get_seg_entry(sbi, i);
555
556                 if ((i % 10) == 0)
557                         seq_printf(seq, "%-10d", i);
558                 seq_printf(seq, "%d|%-3u", se->type,
559                                         get_valid_blocks(sbi, i, false));
560                 if ((i % 10) == 9 || i == (total_segs - 1))
561                         seq_putc(seq, '\n');
562                 else
563                         seq_putc(seq, ' ');
564         }
565
566         return 0;
567 }
568
569 static int __maybe_unused segment_bits_seq_show(struct seq_file *seq,
570                                                 void *offset)
571 {
572         struct super_block *sb = seq->private;
573         struct f2fs_sb_info *sbi = F2FS_SB(sb);
574         unsigned int total_segs =
575                         le32_to_cpu(sbi->raw_super->segment_count_main);
576         int i, j;
577
578         seq_puts(seq, "format: segment_type|valid_blocks|bitmaps\n"
579                 "segment_type(0:HD, 1:WD, 2:CD, 3:HN, 4:WN, 5:CN)\n");
580
581         for (i = 0; i < total_segs; i++) {
582                 struct seg_entry *se = get_seg_entry(sbi, i);
583
584                 seq_printf(seq, "%-10d", i);
585                 seq_printf(seq, "%d|%-3u|", se->type,
586                                         get_valid_blocks(sbi, i, false));
587                 for (j = 0; j < SIT_VBLOCK_MAP_SIZE; j++)
588                         seq_printf(seq, " %.2x", se->cur_valid_map[j]);
589                 seq_putc(seq, '\n');
590         }
591         return 0;
592 }
593
594 static int __maybe_unused iostat_info_seq_show(struct seq_file *seq,
595                                                void *offset)
596 {
597         struct super_block *sb = seq->private;
598         struct f2fs_sb_info *sbi = F2FS_SB(sb);
599         time64_t now = ktime_get_real_seconds();
600
601         if (!sbi->iostat_enable)
602                 return 0;
603
604         seq_printf(seq, "time:          %-16llu\n", now);
605
606         /* print app IOs */
607         seq_printf(seq, "app buffered:  %-16llu\n",
608                                 sbi->write_iostat[APP_BUFFERED_IO]);
609         seq_printf(seq, "app direct:    %-16llu\n",
610                                 sbi->write_iostat[APP_DIRECT_IO]);
611         seq_printf(seq, "app mapped:    %-16llu\n",
612                                 sbi->write_iostat[APP_MAPPED_IO]);
613
614         /* print fs IOs */
615         seq_printf(seq, "fs data:       %-16llu\n",
616                                 sbi->write_iostat[FS_DATA_IO]);
617         seq_printf(seq, "fs node:       %-16llu\n",
618                                 sbi->write_iostat[FS_NODE_IO]);
619         seq_printf(seq, "fs meta:       %-16llu\n",
620                                 sbi->write_iostat[FS_META_IO]);
621         seq_printf(seq, "fs gc data:    %-16llu\n",
622                                 sbi->write_iostat[FS_GC_DATA_IO]);
623         seq_printf(seq, "fs gc node:    %-16llu\n",
624                                 sbi->write_iostat[FS_GC_NODE_IO]);
625         seq_printf(seq, "fs cp data:    %-16llu\n",
626                                 sbi->write_iostat[FS_CP_DATA_IO]);
627         seq_printf(seq, "fs cp node:    %-16llu\n",
628                                 sbi->write_iostat[FS_CP_NODE_IO]);
629         seq_printf(seq, "fs cp meta:    %-16llu\n",
630                                 sbi->write_iostat[FS_CP_META_IO]);
631         seq_printf(seq, "fs discard:    %-16llu\n",
632                                 sbi->write_iostat[FS_DISCARD]);
633
634         return 0;
635 }
636
637 static int __maybe_unused victim_bits_seq_show(struct seq_file *seq,
638                                                 void *offset)
639 {
640         struct super_block *sb = seq->private;
641         struct f2fs_sb_info *sbi = F2FS_SB(sb);
642         struct dirty_seglist_info *dirty_i = DIRTY_I(sbi);
643         int i;
644
645         seq_puts(seq, "format: victim_secmap bitmaps\n");
646
647         for (i = 0; i < MAIN_SECS(sbi); i++) {
648                 if ((i % 10) == 0)
649                         seq_printf(seq, "%-10d", i);
650                 seq_printf(seq, "%d", test_bit(i, dirty_i->victim_secmap) ? 1 : 0);
651                 if ((i % 10) == 9 || i == (MAIN_SECS(sbi) - 1))
652                         seq_putc(seq, '\n');
653                 else
654                         seq_putc(seq, ' ');
655         }
656         return 0;
657 }
658
659 int __init f2fs_init_sysfs(void)
660 {
661         int ret;
662
663         kobject_set_name(&f2fs_kset.kobj, "f2fs");
664         f2fs_kset.kobj.parent = fs_kobj;
665         ret = kset_register(&f2fs_kset);
666         if (ret)
667                 return ret;
668
669         ret = kobject_init_and_add(&f2fs_feat, &f2fs_feat_ktype,
670                                    NULL, "features");
671         if (ret)
672                 kset_unregister(&f2fs_kset);
673         else
674                 f2fs_proc_root = proc_mkdir("fs/f2fs", NULL);
675         return ret;
676 }
677
678 void f2fs_exit_sysfs(void)
679 {
680         kobject_put(&f2fs_feat);
681         kset_unregister(&f2fs_kset);
682         remove_proc_entry("fs/f2fs", NULL);
683         f2fs_proc_root = NULL;
684 }
685
686 int f2fs_register_sysfs(struct f2fs_sb_info *sbi)
687 {
688         struct super_block *sb = sbi->sb;
689         int err;
690
691         sbi->s_kobj.kset = &f2fs_kset;
692         init_completion(&sbi->s_kobj_unregister);
693         err = kobject_init_and_add(&sbi->s_kobj, &f2fs_sb_ktype, NULL,
694                                 "%s", sb->s_id);
695         if (err)
696                 return err;
697
698         if (f2fs_proc_root)
699                 sbi->s_proc = proc_mkdir(sb->s_id, f2fs_proc_root);
700
701         if (sbi->s_proc) {
702                 proc_create_single_data("segment_info", S_IRUGO, sbi->s_proc,
703                                 segment_info_seq_show, sb);
704                 proc_create_single_data("segment_bits", S_IRUGO, sbi->s_proc,
705                                 segment_bits_seq_show, sb);
706                 proc_create_single_data("iostat_info", S_IRUGO, sbi->s_proc,
707                                 iostat_info_seq_show, sb);
708                 proc_create_single_data("victim_bits", S_IRUGO, sbi->s_proc,
709                                 victim_bits_seq_show, sb);
710         }
711         return 0;
712 }
713
714 void f2fs_unregister_sysfs(struct f2fs_sb_info *sbi)
715 {
716         if (sbi->s_proc) {
717                 remove_proc_entry("iostat_info", sbi->s_proc);
718                 remove_proc_entry("segment_info", sbi->s_proc);
719                 remove_proc_entry("segment_bits", sbi->s_proc);
720                 remove_proc_entry("victim_bits", sbi->s_proc);
721                 remove_proc_entry(sbi->sb->s_id, f2fs_proc_root);
722         }
723         kobject_del(&sbi->s_kobj);
724 }