xref: /linux/fs/f2fs/sysfs.c (revision 8e1bb4a41aa78d6105e59186af3dcd545fc66e70)
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 "iostat.h"
21 #include <trace/events/f2fs.h>
22 
23 static struct proc_dir_entry *f2fs_proc_root;
24 
25 /* Sysfs support for f2fs */
26 enum {
27 	GC_THREAD,	/* struct f2fs_gc_thread */
28 	SM_INFO,	/* struct f2fs_sm_info */
29 	DCC_INFO,	/* struct discard_cmd_control */
30 	NM_INFO,	/* struct f2fs_nm_info */
31 	F2FS_SBI,	/* struct f2fs_sb_info */
32 #ifdef CONFIG_F2FS_STAT_FS
33 	STAT_INFO,	/* struct f2fs_stat_info */
34 #endif
35 #ifdef CONFIG_F2FS_FAULT_INJECTION
36 	FAULT_INFO_RATE,	/* struct f2fs_fault_info */
37 	FAULT_INFO_TYPE,	/* struct f2fs_fault_info */
38 #endif
39 	RESERVED_BLOCKS,	/* struct f2fs_sb_info */
40 	CPRC_INFO,	/* struct ckpt_req_control */
41 	ATGC_INFO,	/* struct atgc_management */
42 };
43 
44 static const char *gc_mode_names[MAX_GC_MODE] = {
45 	"GC_NORMAL",
46 	"GC_IDLE_CB",
47 	"GC_IDLE_GREEDY",
48 	"GC_IDLE_AT",
49 	"GC_URGENT_HIGH",
50 	"GC_URGENT_LOW",
51 	"GC_URGENT_MID"
52 };
53 
54 struct f2fs_attr {
55 	struct attribute attr;
56 	ssize_t (*show)(struct f2fs_attr *a, struct f2fs_sb_info *sbi, char *buf);
57 	ssize_t (*store)(struct f2fs_attr *a, struct f2fs_sb_info *sbi,
58 			 const char *buf, size_t len);
59 	int struct_type;
60 	int offset;
61 	int id;
62 };
63 
64 static ssize_t f2fs_sbi_show(struct f2fs_attr *a,
65 			     struct f2fs_sb_info *sbi, char *buf);
66 
67 static unsigned char *__struct_ptr(struct f2fs_sb_info *sbi, int struct_type)
68 {
69 	if (struct_type == GC_THREAD)
70 		return (unsigned char *)sbi->gc_thread;
71 	else if (struct_type == SM_INFO)
72 		return (unsigned char *)SM_I(sbi);
73 	else if (struct_type == DCC_INFO)
74 		return (unsigned char *)SM_I(sbi)->dcc_info;
75 	else if (struct_type == NM_INFO)
76 		return (unsigned char *)NM_I(sbi);
77 	else if (struct_type == F2FS_SBI || struct_type == RESERVED_BLOCKS)
78 		return (unsigned char *)sbi;
79 #ifdef CONFIG_F2FS_FAULT_INJECTION
80 	else if (struct_type == FAULT_INFO_RATE ||
81 					struct_type == FAULT_INFO_TYPE)
82 		return (unsigned char *)&F2FS_OPTION(sbi).fault_info;
83 #endif
84 #ifdef CONFIG_F2FS_STAT_FS
85 	else if (struct_type == STAT_INFO)
86 		return (unsigned char *)F2FS_STAT(sbi);
87 #endif
88 	else if (struct_type == CPRC_INFO)
89 		return (unsigned char *)&sbi->cprc_info;
90 	else if (struct_type == ATGC_INFO)
91 		return (unsigned char *)&sbi->am;
92 	return NULL;
93 }
94 
95 static ssize_t dirty_segments_show(struct f2fs_attr *a,
96 		struct f2fs_sb_info *sbi, char *buf)
97 {
98 	return sysfs_emit(buf, "%llu\n",
99 			(unsigned long long)(dirty_segments(sbi)));
100 }
101 
102 static ssize_t free_segments_show(struct f2fs_attr *a,
103 		struct f2fs_sb_info *sbi, char *buf)
104 {
105 	return sysfs_emit(buf, "%llu\n",
106 			(unsigned long long)(free_segments(sbi)));
107 }
108 
109 static ssize_t ovp_segments_show(struct f2fs_attr *a,
110 		struct f2fs_sb_info *sbi, char *buf)
111 {
112 	return sysfs_emit(buf, "%llu\n",
113 			(unsigned long long)(overprovision_segments(sbi)));
114 }
115 
116 static ssize_t lifetime_write_kbytes_show(struct f2fs_attr *a,
117 		struct f2fs_sb_info *sbi, char *buf)
118 {
119 	return sysfs_emit(buf, "%llu\n",
120 			(unsigned long long)(sbi->kbytes_written +
121 			((f2fs_get_sectors_written(sbi) -
122 				sbi->sectors_written_start) >> 1)));
123 }
124 
125 static ssize_t sb_status_show(struct f2fs_attr *a,
126 		struct f2fs_sb_info *sbi, char *buf)
127 {
128 	return sysfs_emit(buf, "%lx\n", sbi->s_flag);
129 }
130 
131 static ssize_t cp_status_show(struct f2fs_attr *a,
132 		struct f2fs_sb_info *sbi, char *buf)
133 {
134 	return sysfs_emit(buf, "%x\n", le32_to_cpu(F2FS_CKPT(sbi)->ckpt_flags));
135 }
136 
137 static ssize_t pending_discard_show(struct f2fs_attr *a,
138 		struct f2fs_sb_info *sbi, char *buf)
139 {
140 	if (!SM_I(sbi)->dcc_info)
141 		return -EINVAL;
142 	return sysfs_emit(buf, "%llu\n", (unsigned long long)atomic_read(
143 				&SM_I(sbi)->dcc_info->discard_cmd_cnt));
144 }
145 
146 static ssize_t issued_discard_show(struct f2fs_attr *a,
147 		struct f2fs_sb_info *sbi, char *buf)
148 {
149 	if (!SM_I(sbi)->dcc_info)
150 		return -EINVAL;
151 	return sysfs_emit(buf, "%llu\n", (unsigned long long)atomic_read(
152 				&SM_I(sbi)->dcc_info->issued_discard));
153 }
154 
155 static ssize_t queued_discard_show(struct f2fs_attr *a,
156 		struct f2fs_sb_info *sbi, char *buf)
157 {
158 	if (!SM_I(sbi)->dcc_info)
159 		return -EINVAL;
160 	return sysfs_emit(buf, "%llu\n", (unsigned long long)atomic_read(
161 				&SM_I(sbi)->dcc_info->queued_discard));
162 }
163 
164 static ssize_t undiscard_blks_show(struct f2fs_attr *a,
165 		struct f2fs_sb_info *sbi, char *buf)
166 {
167 	if (!SM_I(sbi)->dcc_info)
168 		return -EINVAL;
169 	return sysfs_emit(buf, "%u\n",
170 				SM_I(sbi)->dcc_info->undiscard_blks);
171 }
172 
173 static ssize_t gc_mode_show(struct f2fs_attr *a,
174 		struct f2fs_sb_info *sbi, char *buf)
175 {
176 	return sysfs_emit(buf, "%s\n", gc_mode_names[sbi->gc_mode]);
177 }
178 
179 static ssize_t features_show(struct f2fs_attr *a,
180 		struct f2fs_sb_info *sbi, char *buf)
181 {
182 	int len = 0;
183 
184 	if (f2fs_sb_has_encrypt(sbi))
185 		len += scnprintf(buf, PAGE_SIZE - len, "%s",
186 						"encryption");
187 	if (f2fs_sb_has_blkzoned(sbi))
188 		len += scnprintf(buf + len, PAGE_SIZE - len, "%s%s",
189 				len ? ", " : "", "blkzoned");
190 	if (f2fs_sb_has_extra_attr(sbi))
191 		len += scnprintf(buf + len, PAGE_SIZE - len, "%s%s",
192 				len ? ", " : "", "extra_attr");
193 	if (f2fs_sb_has_project_quota(sbi))
194 		len += scnprintf(buf + len, PAGE_SIZE - len, "%s%s",
195 				len ? ", " : "", "projquota");
196 	if (f2fs_sb_has_inode_chksum(sbi))
197 		len += scnprintf(buf + len, PAGE_SIZE - len, "%s%s",
198 				len ? ", " : "", "inode_checksum");
199 	if (f2fs_sb_has_flexible_inline_xattr(sbi))
200 		len += scnprintf(buf + len, PAGE_SIZE - len, "%s%s",
201 				len ? ", " : "", "flexible_inline_xattr");
202 	if (f2fs_sb_has_quota_ino(sbi))
203 		len += scnprintf(buf + len, PAGE_SIZE - len, "%s%s",
204 				len ? ", " : "", "quota_ino");
205 	if (f2fs_sb_has_inode_crtime(sbi))
206 		len += scnprintf(buf + len, PAGE_SIZE - len, "%s%s",
207 				len ? ", " : "", "inode_crtime");
208 	if (f2fs_sb_has_lost_found(sbi))
209 		len += scnprintf(buf + len, PAGE_SIZE - len, "%s%s",
210 				len ? ", " : "", "lost_found");
211 	if (f2fs_sb_has_verity(sbi))
212 		len += scnprintf(buf + len, PAGE_SIZE - len, "%s%s",
213 				len ? ", " : "", "verity");
214 	if (f2fs_sb_has_sb_chksum(sbi))
215 		len += scnprintf(buf + len, PAGE_SIZE - len, "%s%s",
216 				len ? ", " : "", "sb_checksum");
217 	if (f2fs_sb_has_casefold(sbi))
218 		len += scnprintf(buf + len, PAGE_SIZE - len, "%s%s",
219 				len ? ", " : "", "casefold");
220 	if (f2fs_sb_has_readonly(sbi))
221 		len += scnprintf(buf + len, PAGE_SIZE - len, "%s%s",
222 				len ? ", " : "", "readonly");
223 	if (f2fs_sb_has_compression(sbi))
224 		len += scnprintf(buf + len, PAGE_SIZE - len, "%s%s",
225 				len ? ", " : "", "compression");
226 	len += scnprintf(buf + len, PAGE_SIZE - len, "%s%s",
227 				len ? ", " : "", "pin_file");
228 	len += scnprintf(buf + len, PAGE_SIZE - len, "\n");
229 	return len;
230 }
231 
232 static ssize_t current_reserved_blocks_show(struct f2fs_attr *a,
233 					struct f2fs_sb_info *sbi, char *buf)
234 {
235 	return sysfs_emit(buf, "%u\n", sbi->current_reserved_blocks);
236 }
237 
238 static ssize_t unusable_show(struct f2fs_attr *a,
239 		struct f2fs_sb_info *sbi, char *buf)
240 {
241 	block_t unusable;
242 
243 	if (test_opt(sbi, DISABLE_CHECKPOINT))
244 		unusable = sbi->unusable_block_count;
245 	else
246 		unusable = f2fs_get_unusable_blocks(sbi);
247 	return sysfs_emit(buf, "%llu\n", (unsigned long long)unusable);
248 }
249 
250 static ssize_t encoding_show(struct f2fs_attr *a,
251 		struct f2fs_sb_info *sbi, char *buf)
252 {
253 #if IS_ENABLED(CONFIG_UNICODE)
254 	struct super_block *sb = sbi->sb;
255 
256 	if (f2fs_sb_has_casefold(sbi))
257 		return sysfs_emit(buf, "UTF-8 (%d.%d.%d)\n",
258 			(sb->s_encoding->version >> 16) & 0xff,
259 			(sb->s_encoding->version >> 8) & 0xff,
260 			sb->s_encoding->version & 0xff);
261 #endif
262 	return sysfs_emit(buf, "(none)\n");
263 }
264 
265 static ssize_t mounted_time_sec_show(struct f2fs_attr *a,
266 		struct f2fs_sb_info *sbi, char *buf)
267 {
268 	return sysfs_emit(buf, "%llu\n", SIT_I(sbi)->mounted_time);
269 }
270 
271 #ifdef CONFIG_F2FS_STAT_FS
272 static ssize_t moved_blocks_foreground_show(struct f2fs_attr *a,
273 				struct f2fs_sb_info *sbi, char *buf)
274 {
275 	struct f2fs_stat_info *si = F2FS_STAT(sbi);
276 
277 	return sysfs_emit(buf, "%llu\n",
278 		(unsigned long long)(si->tot_blks -
279 			(si->bg_data_blks + si->bg_node_blks)));
280 }
281 
282 static ssize_t moved_blocks_background_show(struct f2fs_attr *a,
283 				struct f2fs_sb_info *sbi, char *buf)
284 {
285 	struct f2fs_stat_info *si = F2FS_STAT(sbi);
286 
287 	return sysfs_emit(buf, "%llu\n",
288 		(unsigned long long)(si->bg_data_blks + si->bg_node_blks));
289 }
290 
291 static ssize_t avg_vblocks_show(struct f2fs_attr *a,
292 		struct f2fs_sb_info *sbi, char *buf)
293 {
294 	struct f2fs_stat_info *si = F2FS_STAT(sbi);
295 
296 	si->dirty_count = dirty_segments(sbi);
297 	f2fs_update_sit_info(sbi);
298 	return sysfs_emit(buf, "%llu\n", (unsigned long long)(si->avg_vblocks));
299 }
300 #endif
301 
302 static ssize_t main_blkaddr_show(struct f2fs_attr *a,
303 				struct f2fs_sb_info *sbi, char *buf)
304 {
305 	return sysfs_emit(buf, "%llu\n",
306 			(unsigned long long)MAIN_BLKADDR(sbi));
307 }
308 
309 static ssize_t f2fs_sbi_show(struct f2fs_attr *a,
310 			struct f2fs_sb_info *sbi, char *buf)
311 {
312 	unsigned char *ptr = NULL;
313 	unsigned int *ui;
314 
315 	ptr = __struct_ptr(sbi, a->struct_type);
316 	if (!ptr)
317 		return -EINVAL;
318 
319 	if (!strcmp(a->attr.name, "extension_list")) {
320 		__u8 (*extlist)[F2FS_EXTENSION_LEN] =
321 					sbi->raw_super->extension_list;
322 		int cold_count = le32_to_cpu(sbi->raw_super->extension_count);
323 		int hot_count = sbi->raw_super->hot_ext_count;
324 		int len = 0, i;
325 
326 		len += scnprintf(buf + len, PAGE_SIZE - len,
327 						"cold file extension:\n");
328 		for (i = 0; i < cold_count; i++)
329 			len += scnprintf(buf + len, PAGE_SIZE - len, "%s\n",
330 								extlist[i]);
331 
332 		len += scnprintf(buf + len, PAGE_SIZE - len,
333 						"hot file extension:\n");
334 		for (i = cold_count; i < cold_count + hot_count; i++)
335 			len += scnprintf(buf + len, PAGE_SIZE - len, "%s\n",
336 								extlist[i]);
337 		return len;
338 	}
339 
340 	if (!strcmp(a->attr.name, "ckpt_thread_ioprio")) {
341 		struct ckpt_req_control *cprc = &sbi->cprc_info;
342 		int class = IOPRIO_PRIO_CLASS(cprc->ckpt_thread_ioprio);
343 		int level = IOPRIO_PRIO_LEVEL(cprc->ckpt_thread_ioprio);
344 
345 		if (class != IOPRIO_CLASS_RT && class != IOPRIO_CLASS_BE)
346 			return -EINVAL;
347 
348 		return sysfs_emit(buf, "%s,%d\n",
349 			class == IOPRIO_CLASS_RT ? "rt" : "be", level);
350 	}
351 
352 #ifdef CONFIG_F2FS_FS_COMPRESSION
353 	if (!strcmp(a->attr.name, "compr_written_block"))
354 		return sysfs_emit(buf, "%llu\n", sbi->compr_written_block);
355 
356 	if (!strcmp(a->attr.name, "compr_saved_block"))
357 		return sysfs_emit(buf, "%llu\n", sbi->compr_saved_block);
358 
359 	if (!strcmp(a->attr.name, "compr_new_inode"))
360 		return sysfs_emit(buf, "%u\n", sbi->compr_new_inode);
361 #endif
362 
363 	if (!strcmp(a->attr.name, "gc_segment_mode"))
364 		return sysfs_emit(buf, "%u\n", sbi->gc_segment_mode);
365 
366 	if (!strcmp(a->attr.name, "gc_reclaimed_segments")) {
367 		return sysfs_emit(buf, "%u\n",
368 			sbi->gc_reclaimed_segs[sbi->gc_segment_mode]);
369 	}
370 
371 	if (!strcmp(a->attr.name, "current_atomic_write")) {
372 		s64 current_write = atomic64_read(&sbi->current_atomic_write);
373 
374 		return sysfs_emit(buf, "%lld\n", current_write);
375 	}
376 
377 	if (!strcmp(a->attr.name, "peak_atomic_write"))
378 		return sysfs_emit(buf, "%lld\n", sbi->peak_atomic_write);
379 
380 	if (!strcmp(a->attr.name, "committed_atomic_block"))
381 		return sysfs_emit(buf, "%llu\n", sbi->committed_atomic_block);
382 
383 	if (!strcmp(a->attr.name, "revoked_atomic_block"))
384 		return sysfs_emit(buf, "%llu\n", sbi->revoked_atomic_block);
385 
386 #ifdef CONFIG_F2FS_STAT_FS
387 	if (!strcmp(a->attr.name, "cp_foreground_calls"))
388 		return sysfs_emit(buf, "%d\n",
389 				atomic_read(&sbi->cp_call_count[TOTAL_CALL]) -
390 				atomic_read(&sbi->cp_call_count[BACKGROUND]));
391 	if (!strcmp(a->attr.name, "cp_background_calls"))
392 		return sysfs_emit(buf, "%d\n",
393 				atomic_read(&sbi->cp_call_count[BACKGROUND]));
394 #endif
395 
396 	ui = (unsigned int *)(ptr + a->offset);
397 
398 	return sysfs_emit(buf, "%u\n", *ui);
399 }
400 
401 static ssize_t __sbi_store(struct f2fs_attr *a,
402 			struct f2fs_sb_info *sbi,
403 			const char *buf, size_t count)
404 {
405 	unsigned char *ptr;
406 	unsigned long t;
407 	unsigned int *ui;
408 	ssize_t ret;
409 
410 	ptr = __struct_ptr(sbi, a->struct_type);
411 	if (!ptr)
412 		return -EINVAL;
413 
414 	if (!strcmp(a->attr.name, "extension_list")) {
415 		const char *name = strim((char *)buf);
416 		bool set = true, hot;
417 
418 		if (!strncmp(name, "[h]", 3))
419 			hot = true;
420 		else if (!strncmp(name, "[c]", 3))
421 			hot = false;
422 		else
423 			return -EINVAL;
424 
425 		name += 3;
426 
427 		if (*name == '!') {
428 			name++;
429 			set = false;
430 		}
431 
432 		if (!strlen(name) || strlen(name) >= F2FS_EXTENSION_LEN)
433 			return -EINVAL;
434 
435 		f2fs_down_write(&sbi->sb_lock);
436 
437 		ret = f2fs_update_extension_list(sbi, name, hot, set);
438 		if (ret)
439 			goto out;
440 
441 		ret = f2fs_commit_super(sbi, false);
442 		if (ret)
443 			f2fs_update_extension_list(sbi, name, hot, !set);
444 out:
445 		f2fs_up_write(&sbi->sb_lock);
446 		return ret ? ret : count;
447 	}
448 
449 	if (!strcmp(a->attr.name, "ckpt_thread_ioprio")) {
450 		const char *name = strim((char *)buf);
451 		struct ckpt_req_control *cprc = &sbi->cprc_info;
452 		int class;
453 		long level;
454 		int ret;
455 
456 		if (!strncmp(name, "rt,", 3))
457 			class = IOPRIO_CLASS_RT;
458 		else if (!strncmp(name, "be,", 3))
459 			class = IOPRIO_CLASS_BE;
460 		else
461 			return -EINVAL;
462 
463 		name += 3;
464 		ret = kstrtol(name, 10, &level);
465 		if (ret)
466 			return ret;
467 		if (level >= IOPRIO_NR_LEVELS || level < 0)
468 			return -EINVAL;
469 
470 		cprc->ckpt_thread_ioprio = IOPRIO_PRIO_VALUE(class, level);
471 		if (test_opt(sbi, MERGE_CHECKPOINT)) {
472 			ret = set_task_ioprio(cprc->f2fs_issue_ckpt,
473 					cprc->ckpt_thread_ioprio);
474 			if (ret)
475 				return ret;
476 		}
477 
478 		return count;
479 	}
480 
481 	ui = (unsigned int *)(ptr + a->offset);
482 
483 	ret = kstrtoul(skip_spaces(buf), 0, &t);
484 	if (ret < 0)
485 		return ret;
486 #ifdef CONFIG_F2FS_FAULT_INJECTION
487 	if (a->struct_type == FAULT_INFO_TYPE) {
488 		if (f2fs_build_fault_attr(sbi, 0, t))
489 			return -EINVAL;
490 		return count;
491 	}
492 	if (a->struct_type == FAULT_INFO_RATE) {
493 		if (f2fs_build_fault_attr(sbi, t, 0))
494 			return -EINVAL;
495 		return count;
496 	}
497 #endif
498 	if (a->struct_type == RESERVED_BLOCKS) {
499 		spin_lock(&sbi->stat_lock);
500 		if (t > (unsigned long)(sbi->user_block_count -
501 				F2FS_OPTION(sbi).root_reserved_blocks -
502 				SEGS_TO_BLKS(sbi,
503 				SM_I(sbi)->additional_reserved_segments))) {
504 			spin_unlock(&sbi->stat_lock);
505 			return -EINVAL;
506 		}
507 		*ui = t;
508 		sbi->current_reserved_blocks = min(sbi->reserved_blocks,
509 				sbi->user_block_count - valid_user_blocks(sbi));
510 		spin_unlock(&sbi->stat_lock);
511 		return count;
512 	}
513 
514 	if (!strcmp(a->attr.name, "discard_io_aware_gran")) {
515 		if (t > MAX_PLIST_NUM)
516 			return -EINVAL;
517 		if (!f2fs_block_unit_discard(sbi))
518 			return -EINVAL;
519 		if (t == *ui)
520 			return count;
521 		*ui = t;
522 		return count;
523 	}
524 
525 	if (!strcmp(a->attr.name, "discard_granularity")) {
526 		if (t == 0 || t > MAX_PLIST_NUM)
527 			return -EINVAL;
528 		if (!f2fs_block_unit_discard(sbi))
529 			return -EINVAL;
530 		if (t == *ui)
531 			return count;
532 		*ui = t;
533 		return count;
534 	}
535 
536 	if (!strcmp(a->attr.name, "max_ordered_discard")) {
537 		if (t == 0 || t > MAX_PLIST_NUM)
538 			return -EINVAL;
539 		if (!f2fs_block_unit_discard(sbi))
540 			return -EINVAL;
541 		*ui = t;
542 		return count;
543 	}
544 
545 	if (!strcmp(a->attr.name, "discard_urgent_util")) {
546 		if (t > 100)
547 			return -EINVAL;
548 		*ui = t;
549 		return count;
550 	}
551 
552 	if (!strcmp(a->attr.name, "discard_io_aware")) {
553 		if (t >= DPOLICY_IO_AWARE_MAX)
554 			return -EINVAL;
555 		*ui = t;
556 		return count;
557 	}
558 
559 	if (!strcmp(a->attr.name, "migration_granularity")) {
560 		if (t == 0 || t > SEGS_PER_SEC(sbi))
561 			return -EINVAL;
562 	}
563 
564 	if (!strcmp(a->attr.name, "gc_urgent")) {
565 		if (t == 0) {
566 			sbi->gc_mode = GC_NORMAL;
567 		} else if (t == 1) {
568 			sbi->gc_mode = GC_URGENT_HIGH;
569 			if (sbi->gc_thread) {
570 				sbi->gc_thread->gc_wake = true;
571 				wake_up_interruptible_all(
572 					&sbi->gc_thread->gc_wait_queue_head);
573 				wake_up_discard_thread(sbi, true);
574 			}
575 		} else if (t == 2) {
576 			sbi->gc_mode = GC_URGENT_LOW;
577 		} else if (t == 3) {
578 			sbi->gc_mode = GC_URGENT_MID;
579 			if (sbi->gc_thread) {
580 				sbi->gc_thread->gc_wake = true;
581 				wake_up_interruptible_all(
582 					&sbi->gc_thread->gc_wait_queue_head);
583 			}
584 		} else {
585 			return -EINVAL;
586 		}
587 		return count;
588 	}
589 	if (!strcmp(a->attr.name, "gc_idle")) {
590 		if (t == GC_IDLE_CB) {
591 			sbi->gc_mode = GC_IDLE_CB;
592 		} else if (t == GC_IDLE_GREEDY) {
593 			sbi->gc_mode = GC_IDLE_GREEDY;
594 		} else if (t == GC_IDLE_AT) {
595 			if (!sbi->am.atgc_enabled)
596 				return -EINVAL;
597 			sbi->gc_mode = GC_IDLE_AT;
598 		} else {
599 			sbi->gc_mode = GC_NORMAL;
600 		}
601 		return count;
602 	}
603 
604 	if (!strcmp(a->attr.name, "gc_remaining_trials")) {
605 		spin_lock(&sbi->gc_remaining_trials_lock);
606 		sbi->gc_remaining_trials = t;
607 		spin_unlock(&sbi->gc_remaining_trials_lock);
608 
609 		return count;
610 	}
611 
612 #ifdef CONFIG_F2FS_IOSTAT
613 	if (!strcmp(a->attr.name, "iostat_enable")) {
614 		sbi->iostat_enable = !!t;
615 		if (!sbi->iostat_enable)
616 			f2fs_reset_iostat(sbi);
617 		return count;
618 	}
619 
620 	if (!strcmp(a->attr.name, "iostat_period_ms")) {
621 		if (t < MIN_IOSTAT_PERIOD_MS || t > MAX_IOSTAT_PERIOD_MS)
622 			return -EINVAL;
623 		spin_lock_irq(&sbi->iostat_lock);
624 		sbi->iostat_period_ms = (unsigned int)t;
625 		spin_unlock_irq(&sbi->iostat_lock);
626 		return count;
627 	}
628 #endif
629 
630 #ifdef CONFIG_F2FS_FS_COMPRESSION
631 	if (!strcmp(a->attr.name, "compr_written_block") ||
632 		!strcmp(a->attr.name, "compr_saved_block")) {
633 		if (t != 0)
634 			return -EINVAL;
635 		sbi->compr_written_block = 0;
636 		sbi->compr_saved_block = 0;
637 		return count;
638 	}
639 
640 	if (!strcmp(a->attr.name, "compr_new_inode")) {
641 		if (t != 0)
642 			return -EINVAL;
643 		sbi->compr_new_inode = 0;
644 		return count;
645 	}
646 
647 	if (!strcmp(a->attr.name, "compress_percent")) {
648 		if (t == 0 || t > 100)
649 			return -EINVAL;
650 		*ui = t;
651 		return count;
652 	}
653 
654 	if (!strcmp(a->attr.name, "compress_watermark")) {
655 		if (t == 0 || t > 100)
656 			return -EINVAL;
657 		*ui = t;
658 		return count;
659 	}
660 #endif
661 
662 	if (!strcmp(a->attr.name, "atgc_candidate_ratio")) {
663 		if (t > 100)
664 			return -EINVAL;
665 		sbi->am.candidate_ratio = t;
666 		return count;
667 	}
668 
669 	if (!strcmp(a->attr.name, "atgc_age_weight")) {
670 		if (t > 100)
671 			return -EINVAL;
672 		sbi->am.age_weight = t;
673 		return count;
674 	}
675 
676 	if (!strcmp(a->attr.name, "gc_segment_mode")) {
677 		if (t < MAX_GC_MODE)
678 			sbi->gc_segment_mode = t;
679 		else
680 			return -EINVAL;
681 		return count;
682 	}
683 
684 	if (!strcmp(a->attr.name, "gc_pin_file_threshold")) {
685 		if (t > MAX_GC_FAILED_PINNED_FILES)
686 			return -EINVAL;
687 		sbi->gc_pin_file_threshold = t;
688 		return count;
689 	}
690 
691 	if (!strcmp(a->attr.name, "gc_reclaimed_segments")) {
692 		if (t != 0)
693 			return -EINVAL;
694 		sbi->gc_reclaimed_segs[sbi->gc_segment_mode] = 0;
695 		return count;
696 	}
697 
698 	if (!strcmp(a->attr.name, "seq_file_ra_mul")) {
699 		if (t >= MIN_RA_MUL && t <= MAX_RA_MUL)
700 			sbi->seq_file_ra_mul = t;
701 		else
702 			return -EINVAL;
703 		return count;
704 	}
705 
706 	if (!strcmp(a->attr.name, "max_fragment_chunk")) {
707 		if (t >= MIN_FRAGMENT_SIZE && t <= MAX_FRAGMENT_SIZE)
708 			sbi->max_fragment_chunk = t;
709 		else
710 			return -EINVAL;
711 		return count;
712 	}
713 
714 	if (!strcmp(a->attr.name, "max_fragment_hole")) {
715 		if (t >= MIN_FRAGMENT_SIZE && t <= MAX_FRAGMENT_SIZE)
716 			sbi->max_fragment_hole = t;
717 		else
718 			return -EINVAL;
719 		return count;
720 	}
721 
722 	if (!strcmp(a->attr.name, "peak_atomic_write")) {
723 		if (t != 0)
724 			return -EINVAL;
725 		sbi->peak_atomic_write = 0;
726 		return count;
727 	}
728 
729 	if (!strcmp(a->attr.name, "committed_atomic_block")) {
730 		if (t != 0)
731 			return -EINVAL;
732 		sbi->committed_atomic_block = 0;
733 		return count;
734 	}
735 
736 	if (!strcmp(a->attr.name, "revoked_atomic_block")) {
737 		if (t != 0)
738 			return -EINVAL;
739 		sbi->revoked_atomic_block = 0;
740 		return count;
741 	}
742 
743 	if (!strcmp(a->attr.name, "readdir_ra")) {
744 		sbi->readdir_ra = !!t;
745 		return count;
746 	}
747 
748 	if (!strcmp(a->attr.name, "hot_data_age_threshold")) {
749 		if (t == 0 || t >= sbi->warm_data_age_threshold)
750 			return -EINVAL;
751 		if (t == *ui)
752 			return count;
753 		*ui = (unsigned int)t;
754 		return count;
755 	}
756 
757 	if (!strcmp(a->attr.name, "warm_data_age_threshold")) {
758 		if (t <= sbi->hot_data_age_threshold)
759 			return -EINVAL;
760 		if (t == *ui)
761 			return count;
762 		*ui = (unsigned int)t;
763 		return count;
764 	}
765 
766 	if (!strcmp(a->attr.name, "last_age_weight")) {
767 		if (t > 100)
768 			return -EINVAL;
769 		if (t == *ui)
770 			return count;
771 		*ui = (unsigned int)t;
772 		return count;
773 	}
774 
775 	if (!strcmp(a->attr.name, "ipu_policy")) {
776 		if (t >= BIT(F2FS_IPU_MAX))
777 			return -EINVAL;
778 		if (t && f2fs_lfs_mode(sbi))
779 			return -EINVAL;
780 		SM_I(sbi)->ipu_policy = (unsigned int)t;
781 		return count;
782 	}
783 
784 	if (!strcmp(a->attr.name, "dir_level")) {
785 		if (t > MAX_DIR_HASH_DEPTH)
786 			return -EINVAL;
787 		sbi->dir_level = t;
788 		return count;
789 	}
790 
791 	*ui = (unsigned int)t;
792 
793 	return count;
794 }
795 
796 static ssize_t f2fs_sbi_store(struct f2fs_attr *a,
797 			struct f2fs_sb_info *sbi,
798 			const char *buf, size_t count)
799 {
800 	ssize_t ret;
801 	bool gc_entry = (!strcmp(a->attr.name, "gc_urgent") ||
802 					a->struct_type == GC_THREAD);
803 
804 	if (gc_entry) {
805 		if (!down_read_trylock(&sbi->sb->s_umount))
806 			return -EAGAIN;
807 	}
808 	ret = __sbi_store(a, sbi, buf, count);
809 	if (gc_entry)
810 		up_read(&sbi->sb->s_umount);
811 
812 	return ret;
813 }
814 
815 static ssize_t f2fs_attr_show(struct kobject *kobj,
816 				struct attribute *attr, char *buf)
817 {
818 	struct f2fs_sb_info *sbi = container_of(kobj, struct f2fs_sb_info,
819 								s_kobj);
820 	struct f2fs_attr *a = container_of(attr, struct f2fs_attr, attr);
821 
822 	return a->show ? a->show(a, sbi, buf) : 0;
823 }
824 
825 static ssize_t f2fs_attr_store(struct kobject *kobj, struct attribute *attr,
826 						const char *buf, size_t len)
827 {
828 	struct f2fs_sb_info *sbi = container_of(kobj, struct f2fs_sb_info,
829 									s_kobj);
830 	struct f2fs_attr *a = container_of(attr, struct f2fs_attr, attr);
831 
832 	return a->store ? a->store(a, sbi, buf, len) : 0;
833 }
834 
835 static void f2fs_sb_release(struct kobject *kobj)
836 {
837 	struct f2fs_sb_info *sbi = container_of(kobj, struct f2fs_sb_info,
838 								s_kobj);
839 	complete(&sbi->s_kobj_unregister);
840 }
841 
842 /*
843  * Note that there are three feature list entries:
844  * 1) /sys/fs/f2fs/features
845  *   : shows runtime features supported by in-kernel f2fs along with Kconfig.
846  *     - ref. F2FS_FEATURE_RO_ATTR()
847  *
848  * 2) /sys/fs/f2fs/$s_id/features <deprecated>
849  *   : shows on-disk features enabled by mkfs.f2fs, used for old kernels. This
850  *     won't add new feature anymore, and thus, users should check entries in 3)
851  *     instead of this 2).
852  *
853  * 3) /sys/fs/f2fs/$s_id/feature_list
854  *   : shows on-disk features enabled by mkfs.f2fs per instance, which follows
855  *     sysfs entry rule where each entry should expose single value.
856  *     This list covers old feature list provided by 2) and beyond. Therefore,
857  *     please add new on-disk feature in this list only.
858  *     - ref. F2FS_SB_FEATURE_RO_ATTR()
859  */
860 static ssize_t f2fs_feature_show(struct f2fs_attr *a,
861 		struct f2fs_sb_info *sbi, char *buf)
862 {
863 	return sysfs_emit(buf, "supported\n");
864 }
865 
866 #define F2FS_FEATURE_RO_ATTR(_name)				\
867 static struct f2fs_attr f2fs_attr_##_name = {			\
868 	.attr = {.name = __stringify(_name), .mode = 0444 },	\
869 	.show	= f2fs_feature_show,				\
870 }
871 
872 static ssize_t f2fs_sb_feature_show(struct f2fs_attr *a,
873 		struct f2fs_sb_info *sbi, char *buf)
874 {
875 	if (F2FS_HAS_FEATURE(sbi, a->id))
876 		return sysfs_emit(buf, "supported\n");
877 	return sysfs_emit(buf, "unsupported\n");
878 }
879 
880 #define F2FS_SB_FEATURE_RO_ATTR(_name, _feat)			\
881 static struct f2fs_attr f2fs_attr_sb_##_name = {		\
882 	.attr = {.name = __stringify(_name), .mode = 0444 },	\
883 	.show	= f2fs_sb_feature_show,				\
884 	.id	= F2FS_FEATURE_##_feat,				\
885 }
886 
887 #define F2FS_ATTR_OFFSET(_struct_type, _name, _mode, _show, _store, _offset) \
888 static struct f2fs_attr f2fs_attr_##_name = {			\
889 	.attr = {.name = __stringify(_name), .mode = _mode },	\
890 	.show	= _show,					\
891 	.store	= _store,					\
892 	.struct_type = _struct_type,				\
893 	.offset = _offset					\
894 }
895 
896 #define F2FS_RO_ATTR(struct_type, struct_name, name, elname)	\
897 	F2FS_ATTR_OFFSET(struct_type, name, 0444,		\
898 		f2fs_sbi_show, NULL,				\
899 		offsetof(struct struct_name, elname))
900 
901 #define F2FS_RW_ATTR(struct_type, struct_name, name, elname)	\
902 	F2FS_ATTR_OFFSET(struct_type, name, 0644,		\
903 		f2fs_sbi_show, f2fs_sbi_store,			\
904 		offsetof(struct struct_name, elname))
905 
906 #define F2FS_GENERAL_RO_ATTR(name) \
907 static struct f2fs_attr f2fs_attr_##name = __ATTR(name, 0444, name##_show, NULL)
908 
909 #ifdef CONFIG_F2FS_STAT_FS
910 #define STAT_INFO_RO_ATTR(name, elname)				\
911 	F2FS_RO_ATTR(STAT_INFO, f2fs_stat_info, name, elname)
912 #endif
913 
914 #define GC_THREAD_RW_ATTR(name, elname)				\
915 	F2FS_RW_ATTR(GC_THREAD, f2fs_gc_kthread, name, elname)
916 
917 #define SM_INFO_RW_ATTR(name, elname)				\
918 	F2FS_RW_ATTR(SM_INFO, f2fs_sm_info, name, elname)
919 
920 #define SM_INFO_GENERAL_RW_ATTR(elname)				\
921 	SM_INFO_RW_ATTR(elname, elname)
922 
923 #define DCC_INFO_RW_ATTR(name, elname)				\
924 	F2FS_RW_ATTR(DCC_INFO, discard_cmd_control, name, elname)
925 
926 #define DCC_INFO_GENERAL_RW_ATTR(elname)			\
927 	DCC_INFO_RW_ATTR(elname, elname)
928 
929 #define NM_INFO_RW_ATTR(name, elname)				\
930 	F2FS_RW_ATTR(NM_INFO, f2fs_nm_info, name, elname)
931 
932 #define NM_INFO_GENERAL_RW_ATTR(elname)				\
933 	NM_INFO_RW_ATTR(elname, elname)
934 
935 #define F2FS_SBI_RW_ATTR(name, elname)				\
936 	F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, name, elname)
937 
938 #define F2FS_SBI_GENERAL_RW_ATTR(elname)			\
939 	F2FS_SBI_RW_ATTR(elname, elname)
940 
941 #define F2FS_SBI_GENERAL_RO_ATTR(elname)			\
942 	F2FS_RO_ATTR(F2FS_SBI, f2fs_sb_info, elname, elname)
943 
944 #ifdef CONFIG_F2FS_FAULT_INJECTION
945 #define FAULT_INFO_GENERAL_RW_ATTR(type, elname)		\
946 	F2FS_RW_ATTR(type, f2fs_fault_info, elname, elname)
947 #endif
948 
949 #define RESERVED_BLOCKS_GENERAL_RW_ATTR(elname)			\
950 	F2FS_RW_ATTR(RESERVED_BLOCKS, f2fs_sb_info, elname, elname)
951 
952 #define CPRC_INFO_GENERAL_RW_ATTR(elname)			\
953 	F2FS_RW_ATTR(CPRC_INFO, ckpt_req_control, elname, elname)
954 
955 #define ATGC_INFO_RW_ATTR(name, elname)				\
956 	F2FS_RW_ATTR(ATGC_INFO, atgc_management, name, elname)
957 
958 /* GC_THREAD ATTR */
959 GC_THREAD_RW_ATTR(gc_urgent_sleep_time, urgent_sleep_time);
960 GC_THREAD_RW_ATTR(gc_min_sleep_time, min_sleep_time);
961 GC_THREAD_RW_ATTR(gc_max_sleep_time, max_sleep_time);
962 GC_THREAD_RW_ATTR(gc_no_gc_sleep_time, no_gc_sleep_time);
963 
964 /* SM_INFO ATTR */
965 SM_INFO_RW_ATTR(reclaim_segments, rec_prefree_segments);
966 SM_INFO_GENERAL_RW_ATTR(ipu_policy);
967 SM_INFO_GENERAL_RW_ATTR(min_ipu_util);
968 SM_INFO_GENERAL_RW_ATTR(min_fsync_blocks);
969 SM_INFO_GENERAL_RW_ATTR(min_seq_blocks);
970 SM_INFO_GENERAL_RW_ATTR(min_hot_blocks);
971 SM_INFO_GENERAL_RW_ATTR(min_ssr_sections);
972 
973 /* DCC_INFO ATTR */
974 DCC_INFO_RW_ATTR(max_small_discards, max_discards);
975 DCC_INFO_GENERAL_RW_ATTR(max_discard_request);
976 DCC_INFO_GENERAL_RW_ATTR(min_discard_issue_time);
977 DCC_INFO_GENERAL_RW_ATTR(mid_discard_issue_time);
978 DCC_INFO_GENERAL_RW_ATTR(max_discard_issue_time);
979 DCC_INFO_GENERAL_RW_ATTR(discard_io_aware_gran);
980 DCC_INFO_GENERAL_RW_ATTR(discard_urgent_util);
981 DCC_INFO_GENERAL_RW_ATTR(discard_granularity);
982 DCC_INFO_GENERAL_RW_ATTR(max_ordered_discard);
983 DCC_INFO_GENERAL_RW_ATTR(discard_io_aware);
984 
985 /* NM_INFO ATTR */
986 NM_INFO_RW_ATTR(max_roll_forward_node_blocks, max_rf_node_blocks);
987 NM_INFO_GENERAL_RW_ATTR(ram_thresh);
988 NM_INFO_GENERAL_RW_ATTR(ra_nid_pages);
989 NM_INFO_GENERAL_RW_ATTR(dirty_nats_ratio);
990 
991 /* F2FS_SBI ATTR */
992 F2FS_RW_ATTR(F2FS_SBI, f2fs_super_block, extension_list, extension_list);
993 F2FS_SBI_RW_ATTR(gc_idle, gc_mode);
994 F2FS_SBI_RW_ATTR(gc_urgent, gc_mode);
995 F2FS_SBI_RW_ATTR(cp_interval, interval_time[CP_TIME]);
996 F2FS_SBI_RW_ATTR(idle_interval, interval_time[REQ_TIME]);
997 F2FS_SBI_RW_ATTR(discard_idle_interval, interval_time[DISCARD_TIME]);
998 F2FS_SBI_RW_ATTR(gc_idle_interval, interval_time[GC_TIME]);
999 F2FS_SBI_RW_ATTR(umount_discard_timeout, interval_time[UMOUNT_DISCARD_TIMEOUT]);
1000 F2FS_SBI_RW_ATTR(gc_pin_file_thresh, gc_pin_file_threshold);
1001 F2FS_SBI_RW_ATTR(gc_reclaimed_segments, gc_reclaimed_segs);
1002 F2FS_SBI_GENERAL_RW_ATTR(max_victim_search);
1003 F2FS_SBI_GENERAL_RW_ATTR(migration_granularity);
1004 F2FS_SBI_GENERAL_RW_ATTR(dir_level);
1005 #ifdef CONFIG_F2FS_IOSTAT
1006 F2FS_SBI_GENERAL_RW_ATTR(iostat_enable);
1007 F2FS_SBI_GENERAL_RW_ATTR(iostat_period_ms);
1008 #endif
1009 F2FS_SBI_GENERAL_RW_ATTR(readdir_ra);
1010 F2FS_SBI_GENERAL_RW_ATTR(max_io_bytes);
1011 F2FS_SBI_GENERAL_RW_ATTR(data_io_flag);
1012 F2FS_SBI_GENERAL_RW_ATTR(node_io_flag);
1013 F2FS_SBI_GENERAL_RW_ATTR(gc_remaining_trials);
1014 F2FS_SBI_GENERAL_RW_ATTR(seq_file_ra_mul);
1015 F2FS_SBI_GENERAL_RW_ATTR(gc_segment_mode);
1016 F2FS_SBI_GENERAL_RW_ATTR(max_fragment_chunk);
1017 F2FS_SBI_GENERAL_RW_ATTR(max_fragment_hole);
1018 #ifdef CONFIG_F2FS_FS_COMPRESSION
1019 F2FS_SBI_GENERAL_RW_ATTR(compr_written_block);
1020 F2FS_SBI_GENERAL_RW_ATTR(compr_saved_block);
1021 F2FS_SBI_GENERAL_RW_ATTR(compr_new_inode);
1022 F2FS_SBI_GENERAL_RW_ATTR(compress_percent);
1023 F2FS_SBI_GENERAL_RW_ATTR(compress_watermark);
1024 #endif
1025 /* atomic write */
1026 F2FS_SBI_GENERAL_RO_ATTR(current_atomic_write);
1027 F2FS_SBI_GENERAL_RW_ATTR(peak_atomic_write);
1028 F2FS_SBI_GENERAL_RW_ATTR(committed_atomic_block);
1029 F2FS_SBI_GENERAL_RW_ATTR(revoked_atomic_block);
1030 /* block age extent cache */
1031 F2FS_SBI_GENERAL_RW_ATTR(hot_data_age_threshold);
1032 F2FS_SBI_GENERAL_RW_ATTR(warm_data_age_threshold);
1033 F2FS_SBI_GENERAL_RW_ATTR(last_age_weight);
1034 #ifdef CONFIG_BLK_DEV_ZONED
1035 F2FS_SBI_GENERAL_RO_ATTR(unusable_blocks_per_sec);
1036 #endif
1037 
1038 /* STAT_INFO ATTR */
1039 #ifdef CONFIG_F2FS_STAT_FS
1040 STAT_INFO_RO_ATTR(cp_foreground_calls, cp_call_count[FOREGROUND]);
1041 STAT_INFO_RO_ATTR(cp_background_calls, cp_call_count[BACKGROUND]);
1042 STAT_INFO_RO_ATTR(gc_foreground_calls, gc_call_count[FOREGROUND]);
1043 STAT_INFO_RO_ATTR(gc_background_calls, gc_call_count[BACKGROUND]);
1044 #endif
1045 
1046 /* FAULT_INFO ATTR */
1047 #ifdef CONFIG_F2FS_FAULT_INJECTION
1048 FAULT_INFO_GENERAL_RW_ATTR(FAULT_INFO_RATE, inject_rate);
1049 FAULT_INFO_GENERAL_RW_ATTR(FAULT_INFO_TYPE, inject_type);
1050 #endif
1051 
1052 /* RESERVED_BLOCKS ATTR */
1053 RESERVED_BLOCKS_GENERAL_RW_ATTR(reserved_blocks);
1054 
1055 /* CPRC_INFO ATTR */
1056 CPRC_INFO_GENERAL_RW_ATTR(ckpt_thread_ioprio);
1057 
1058 /* ATGC_INFO ATTR */
1059 ATGC_INFO_RW_ATTR(atgc_candidate_ratio, candidate_ratio);
1060 ATGC_INFO_RW_ATTR(atgc_candidate_count, max_candidate_count);
1061 ATGC_INFO_RW_ATTR(atgc_age_weight, age_weight);
1062 ATGC_INFO_RW_ATTR(atgc_age_threshold, age_threshold);
1063 
1064 F2FS_GENERAL_RO_ATTR(dirty_segments);
1065 F2FS_GENERAL_RO_ATTR(free_segments);
1066 F2FS_GENERAL_RO_ATTR(ovp_segments);
1067 F2FS_GENERAL_RO_ATTR(lifetime_write_kbytes);
1068 F2FS_GENERAL_RO_ATTR(features);
1069 F2FS_GENERAL_RO_ATTR(current_reserved_blocks);
1070 F2FS_GENERAL_RO_ATTR(unusable);
1071 F2FS_GENERAL_RO_ATTR(encoding);
1072 F2FS_GENERAL_RO_ATTR(mounted_time_sec);
1073 F2FS_GENERAL_RO_ATTR(main_blkaddr);
1074 F2FS_GENERAL_RO_ATTR(pending_discard);
1075 F2FS_GENERAL_RO_ATTR(gc_mode);
1076 #ifdef CONFIG_F2FS_STAT_FS
1077 F2FS_GENERAL_RO_ATTR(moved_blocks_background);
1078 F2FS_GENERAL_RO_ATTR(moved_blocks_foreground);
1079 F2FS_GENERAL_RO_ATTR(avg_vblocks);
1080 #endif
1081 
1082 #ifdef CONFIG_FS_ENCRYPTION
1083 F2FS_FEATURE_RO_ATTR(encryption);
1084 F2FS_FEATURE_RO_ATTR(test_dummy_encryption_v2);
1085 #if IS_ENABLED(CONFIG_UNICODE)
1086 F2FS_FEATURE_RO_ATTR(encrypted_casefold);
1087 #endif
1088 #endif /* CONFIG_FS_ENCRYPTION */
1089 #ifdef CONFIG_BLK_DEV_ZONED
1090 F2FS_FEATURE_RO_ATTR(block_zoned);
1091 #endif
1092 F2FS_FEATURE_RO_ATTR(atomic_write);
1093 F2FS_FEATURE_RO_ATTR(extra_attr);
1094 F2FS_FEATURE_RO_ATTR(project_quota);
1095 F2FS_FEATURE_RO_ATTR(inode_checksum);
1096 F2FS_FEATURE_RO_ATTR(flexible_inline_xattr);
1097 F2FS_FEATURE_RO_ATTR(quota_ino);
1098 F2FS_FEATURE_RO_ATTR(inode_crtime);
1099 F2FS_FEATURE_RO_ATTR(lost_found);
1100 #ifdef CONFIG_FS_VERITY
1101 F2FS_FEATURE_RO_ATTR(verity);
1102 #endif
1103 F2FS_FEATURE_RO_ATTR(sb_checksum);
1104 #if IS_ENABLED(CONFIG_UNICODE)
1105 F2FS_FEATURE_RO_ATTR(casefold);
1106 #endif
1107 F2FS_FEATURE_RO_ATTR(readonly);
1108 #ifdef CONFIG_F2FS_FS_COMPRESSION
1109 F2FS_FEATURE_RO_ATTR(compression);
1110 #endif
1111 F2FS_FEATURE_RO_ATTR(pin_file);
1112 
1113 #define ATTR_LIST(name) (&f2fs_attr_##name.attr)
1114 static struct attribute *f2fs_attrs[] = {
1115 	ATTR_LIST(gc_urgent_sleep_time),
1116 	ATTR_LIST(gc_min_sleep_time),
1117 	ATTR_LIST(gc_max_sleep_time),
1118 	ATTR_LIST(gc_no_gc_sleep_time),
1119 	ATTR_LIST(gc_idle),
1120 	ATTR_LIST(gc_urgent),
1121 	ATTR_LIST(reclaim_segments),
1122 	ATTR_LIST(main_blkaddr),
1123 	ATTR_LIST(max_small_discards),
1124 	ATTR_LIST(max_discard_request),
1125 	ATTR_LIST(min_discard_issue_time),
1126 	ATTR_LIST(mid_discard_issue_time),
1127 	ATTR_LIST(max_discard_issue_time),
1128 	ATTR_LIST(discard_io_aware_gran),
1129 	ATTR_LIST(discard_urgent_util),
1130 	ATTR_LIST(discard_granularity),
1131 	ATTR_LIST(max_ordered_discard),
1132 	ATTR_LIST(discard_io_aware),
1133 	ATTR_LIST(pending_discard),
1134 	ATTR_LIST(gc_mode),
1135 	ATTR_LIST(ipu_policy),
1136 	ATTR_LIST(min_ipu_util),
1137 	ATTR_LIST(min_fsync_blocks),
1138 	ATTR_LIST(min_seq_blocks),
1139 	ATTR_LIST(min_hot_blocks),
1140 	ATTR_LIST(min_ssr_sections),
1141 	ATTR_LIST(max_victim_search),
1142 	ATTR_LIST(migration_granularity),
1143 	ATTR_LIST(dir_level),
1144 	ATTR_LIST(ram_thresh),
1145 	ATTR_LIST(ra_nid_pages),
1146 	ATTR_LIST(dirty_nats_ratio),
1147 	ATTR_LIST(max_roll_forward_node_blocks),
1148 	ATTR_LIST(cp_interval),
1149 	ATTR_LIST(idle_interval),
1150 	ATTR_LIST(discard_idle_interval),
1151 	ATTR_LIST(gc_idle_interval),
1152 	ATTR_LIST(umount_discard_timeout),
1153 #ifdef CONFIG_F2FS_IOSTAT
1154 	ATTR_LIST(iostat_enable),
1155 	ATTR_LIST(iostat_period_ms),
1156 #endif
1157 	ATTR_LIST(readdir_ra),
1158 	ATTR_LIST(max_io_bytes),
1159 	ATTR_LIST(gc_pin_file_thresh),
1160 	ATTR_LIST(extension_list),
1161 #ifdef CONFIG_F2FS_FAULT_INJECTION
1162 	ATTR_LIST(inject_rate),
1163 	ATTR_LIST(inject_type),
1164 #endif
1165 	ATTR_LIST(data_io_flag),
1166 	ATTR_LIST(node_io_flag),
1167 	ATTR_LIST(gc_remaining_trials),
1168 	ATTR_LIST(ckpt_thread_ioprio),
1169 	ATTR_LIST(dirty_segments),
1170 	ATTR_LIST(free_segments),
1171 	ATTR_LIST(ovp_segments),
1172 	ATTR_LIST(unusable),
1173 	ATTR_LIST(lifetime_write_kbytes),
1174 	ATTR_LIST(features),
1175 	ATTR_LIST(reserved_blocks),
1176 	ATTR_LIST(current_reserved_blocks),
1177 	ATTR_LIST(encoding),
1178 	ATTR_LIST(mounted_time_sec),
1179 #ifdef CONFIG_F2FS_STAT_FS
1180 	ATTR_LIST(cp_foreground_calls),
1181 	ATTR_LIST(cp_background_calls),
1182 	ATTR_LIST(gc_foreground_calls),
1183 	ATTR_LIST(gc_background_calls),
1184 	ATTR_LIST(moved_blocks_foreground),
1185 	ATTR_LIST(moved_blocks_background),
1186 	ATTR_LIST(avg_vblocks),
1187 #endif
1188 #ifdef CONFIG_BLK_DEV_ZONED
1189 	ATTR_LIST(unusable_blocks_per_sec),
1190 #endif
1191 #ifdef CONFIG_F2FS_FS_COMPRESSION
1192 	ATTR_LIST(compr_written_block),
1193 	ATTR_LIST(compr_saved_block),
1194 	ATTR_LIST(compr_new_inode),
1195 	ATTR_LIST(compress_percent),
1196 	ATTR_LIST(compress_watermark),
1197 #endif
1198 	/* For ATGC */
1199 	ATTR_LIST(atgc_candidate_ratio),
1200 	ATTR_LIST(atgc_candidate_count),
1201 	ATTR_LIST(atgc_age_weight),
1202 	ATTR_LIST(atgc_age_threshold),
1203 	ATTR_LIST(seq_file_ra_mul),
1204 	ATTR_LIST(gc_segment_mode),
1205 	ATTR_LIST(gc_reclaimed_segments),
1206 	ATTR_LIST(max_fragment_chunk),
1207 	ATTR_LIST(max_fragment_hole),
1208 	ATTR_LIST(current_atomic_write),
1209 	ATTR_LIST(peak_atomic_write),
1210 	ATTR_LIST(committed_atomic_block),
1211 	ATTR_LIST(revoked_atomic_block),
1212 	ATTR_LIST(hot_data_age_threshold),
1213 	ATTR_LIST(warm_data_age_threshold),
1214 	ATTR_LIST(last_age_weight),
1215 	NULL,
1216 };
1217 ATTRIBUTE_GROUPS(f2fs);
1218 
1219 static struct attribute *f2fs_feat_attrs[] = {
1220 #ifdef CONFIG_FS_ENCRYPTION
1221 	ATTR_LIST(encryption),
1222 	ATTR_LIST(test_dummy_encryption_v2),
1223 #if IS_ENABLED(CONFIG_UNICODE)
1224 	ATTR_LIST(encrypted_casefold),
1225 #endif
1226 #endif /* CONFIG_FS_ENCRYPTION */
1227 #ifdef CONFIG_BLK_DEV_ZONED
1228 	ATTR_LIST(block_zoned),
1229 #endif
1230 	ATTR_LIST(atomic_write),
1231 	ATTR_LIST(extra_attr),
1232 	ATTR_LIST(project_quota),
1233 	ATTR_LIST(inode_checksum),
1234 	ATTR_LIST(flexible_inline_xattr),
1235 	ATTR_LIST(quota_ino),
1236 	ATTR_LIST(inode_crtime),
1237 	ATTR_LIST(lost_found),
1238 #ifdef CONFIG_FS_VERITY
1239 	ATTR_LIST(verity),
1240 #endif
1241 	ATTR_LIST(sb_checksum),
1242 #if IS_ENABLED(CONFIG_UNICODE)
1243 	ATTR_LIST(casefold),
1244 #endif
1245 	ATTR_LIST(readonly),
1246 #ifdef CONFIG_F2FS_FS_COMPRESSION
1247 	ATTR_LIST(compression),
1248 #endif
1249 	ATTR_LIST(pin_file),
1250 	NULL,
1251 };
1252 ATTRIBUTE_GROUPS(f2fs_feat);
1253 
1254 F2FS_GENERAL_RO_ATTR(sb_status);
1255 F2FS_GENERAL_RO_ATTR(cp_status);
1256 F2FS_GENERAL_RO_ATTR(issued_discard);
1257 F2FS_GENERAL_RO_ATTR(queued_discard);
1258 F2FS_GENERAL_RO_ATTR(undiscard_blks);
1259 
1260 static struct attribute *f2fs_stat_attrs[] = {
1261 	ATTR_LIST(sb_status),
1262 	ATTR_LIST(cp_status),
1263 	ATTR_LIST(issued_discard),
1264 	ATTR_LIST(queued_discard),
1265 	ATTR_LIST(undiscard_blks),
1266 	NULL,
1267 };
1268 ATTRIBUTE_GROUPS(f2fs_stat);
1269 
1270 F2FS_SB_FEATURE_RO_ATTR(encryption, ENCRYPT);
1271 F2FS_SB_FEATURE_RO_ATTR(block_zoned, BLKZONED);
1272 F2FS_SB_FEATURE_RO_ATTR(extra_attr, EXTRA_ATTR);
1273 F2FS_SB_FEATURE_RO_ATTR(project_quota, PRJQUOTA);
1274 F2FS_SB_FEATURE_RO_ATTR(inode_checksum, INODE_CHKSUM);
1275 F2FS_SB_FEATURE_RO_ATTR(flexible_inline_xattr, FLEXIBLE_INLINE_XATTR);
1276 F2FS_SB_FEATURE_RO_ATTR(quota_ino, QUOTA_INO);
1277 F2FS_SB_FEATURE_RO_ATTR(inode_crtime, INODE_CRTIME);
1278 F2FS_SB_FEATURE_RO_ATTR(lost_found, LOST_FOUND);
1279 F2FS_SB_FEATURE_RO_ATTR(verity, VERITY);
1280 F2FS_SB_FEATURE_RO_ATTR(sb_checksum, SB_CHKSUM);
1281 F2FS_SB_FEATURE_RO_ATTR(casefold, CASEFOLD);
1282 F2FS_SB_FEATURE_RO_ATTR(compression, COMPRESSION);
1283 F2FS_SB_FEATURE_RO_ATTR(readonly, RO);
1284 
1285 static struct attribute *f2fs_sb_feat_attrs[] = {
1286 	ATTR_LIST(sb_encryption),
1287 	ATTR_LIST(sb_block_zoned),
1288 	ATTR_LIST(sb_extra_attr),
1289 	ATTR_LIST(sb_project_quota),
1290 	ATTR_LIST(sb_inode_checksum),
1291 	ATTR_LIST(sb_flexible_inline_xattr),
1292 	ATTR_LIST(sb_quota_ino),
1293 	ATTR_LIST(sb_inode_crtime),
1294 	ATTR_LIST(sb_lost_found),
1295 	ATTR_LIST(sb_verity),
1296 	ATTR_LIST(sb_sb_checksum),
1297 	ATTR_LIST(sb_casefold),
1298 	ATTR_LIST(sb_compression),
1299 	ATTR_LIST(sb_readonly),
1300 	NULL,
1301 };
1302 ATTRIBUTE_GROUPS(f2fs_sb_feat);
1303 
1304 static const struct sysfs_ops f2fs_attr_ops = {
1305 	.show	= f2fs_attr_show,
1306 	.store	= f2fs_attr_store,
1307 };
1308 
1309 static const struct kobj_type f2fs_sb_ktype = {
1310 	.default_groups = f2fs_groups,
1311 	.sysfs_ops	= &f2fs_attr_ops,
1312 	.release	= f2fs_sb_release,
1313 };
1314 
1315 static const struct kobj_type f2fs_ktype = {
1316 	.sysfs_ops	= &f2fs_attr_ops,
1317 };
1318 
1319 static struct kset f2fs_kset = {
1320 	.kobj	= {.ktype = &f2fs_ktype},
1321 };
1322 
1323 static const struct kobj_type f2fs_feat_ktype = {
1324 	.default_groups = f2fs_feat_groups,
1325 	.sysfs_ops	= &f2fs_attr_ops,
1326 };
1327 
1328 static struct kobject f2fs_feat = {
1329 	.kset	= &f2fs_kset,
1330 };
1331 
1332 static ssize_t f2fs_stat_attr_show(struct kobject *kobj,
1333 				struct attribute *attr, char *buf)
1334 {
1335 	struct f2fs_sb_info *sbi = container_of(kobj, struct f2fs_sb_info,
1336 								s_stat_kobj);
1337 	struct f2fs_attr *a = container_of(attr, struct f2fs_attr, attr);
1338 
1339 	return a->show ? a->show(a, sbi, buf) : 0;
1340 }
1341 
1342 static ssize_t f2fs_stat_attr_store(struct kobject *kobj, struct attribute *attr,
1343 						const char *buf, size_t len)
1344 {
1345 	struct f2fs_sb_info *sbi = container_of(kobj, struct f2fs_sb_info,
1346 								s_stat_kobj);
1347 	struct f2fs_attr *a = container_of(attr, struct f2fs_attr, attr);
1348 
1349 	return a->store ? a->store(a, sbi, buf, len) : 0;
1350 }
1351 
1352 static void f2fs_stat_kobj_release(struct kobject *kobj)
1353 {
1354 	struct f2fs_sb_info *sbi = container_of(kobj, struct f2fs_sb_info,
1355 								s_stat_kobj);
1356 	complete(&sbi->s_stat_kobj_unregister);
1357 }
1358 
1359 static const struct sysfs_ops f2fs_stat_attr_ops = {
1360 	.show	= f2fs_stat_attr_show,
1361 	.store	= f2fs_stat_attr_store,
1362 };
1363 
1364 static const struct kobj_type f2fs_stat_ktype = {
1365 	.default_groups = f2fs_stat_groups,
1366 	.sysfs_ops	= &f2fs_stat_attr_ops,
1367 	.release	= f2fs_stat_kobj_release,
1368 };
1369 
1370 static ssize_t f2fs_sb_feat_attr_show(struct kobject *kobj,
1371 				struct attribute *attr, char *buf)
1372 {
1373 	struct f2fs_sb_info *sbi = container_of(kobj, struct f2fs_sb_info,
1374 							s_feature_list_kobj);
1375 	struct f2fs_attr *a = container_of(attr, struct f2fs_attr, attr);
1376 
1377 	return a->show ? a->show(a, sbi, buf) : 0;
1378 }
1379 
1380 static void f2fs_feature_list_kobj_release(struct kobject *kobj)
1381 {
1382 	struct f2fs_sb_info *sbi = container_of(kobj, struct f2fs_sb_info,
1383 							s_feature_list_kobj);
1384 	complete(&sbi->s_feature_list_kobj_unregister);
1385 }
1386 
1387 static const struct sysfs_ops f2fs_feature_list_attr_ops = {
1388 	.show	= f2fs_sb_feat_attr_show,
1389 };
1390 
1391 static const struct kobj_type f2fs_feature_list_ktype = {
1392 	.default_groups = f2fs_sb_feat_groups,
1393 	.sysfs_ops	= &f2fs_feature_list_attr_ops,
1394 	.release	= f2fs_feature_list_kobj_release,
1395 };
1396 
1397 static int __maybe_unused segment_info_seq_show(struct seq_file *seq,
1398 						void *offset)
1399 {
1400 	struct super_block *sb = seq->private;
1401 	struct f2fs_sb_info *sbi = F2FS_SB(sb);
1402 	unsigned int total_segs =
1403 			le32_to_cpu(sbi->raw_super->segment_count_main);
1404 	int i;
1405 
1406 	seq_puts(seq, "format: segment_type|valid_blocks\n"
1407 		"segment_type(0:HD, 1:WD, 2:CD, 3:HN, 4:WN, 5:CN)\n");
1408 
1409 	for (i = 0; i < total_segs; i++) {
1410 		struct seg_entry *se = get_seg_entry(sbi, i);
1411 
1412 		if ((i % 10) == 0)
1413 			seq_printf(seq, "%-10d", i);
1414 		seq_printf(seq, "%d|%-3u", se->type, se->valid_blocks);
1415 		if ((i % 10) == 9 || i == (total_segs - 1))
1416 			seq_putc(seq, '\n');
1417 		else
1418 			seq_putc(seq, ' ');
1419 	}
1420 
1421 	return 0;
1422 }
1423 
1424 static int __maybe_unused segment_bits_seq_show(struct seq_file *seq,
1425 						void *offset)
1426 {
1427 	struct super_block *sb = seq->private;
1428 	struct f2fs_sb_info *sbi = F2FS_SB(sb);
1429 	unsigned int total_segs =
1430 			le32_to_cpu(sbi->raw_super->segment_count_main);
1431 	int i, j;
1432 
1433 	seq_puts(seq, "format: segment_type|valid_blocks|bitmaps\n"
1434 		"segment_type(0:HD, 1:WD, 2:CD, 3:HN, 4:WN, 5:CN)\n");
1435 
1436 	for (i = 0; i < total_segs; i++) {
1437 		struct seg_entry *se = get_seg_entry(sbi, i);
1438 
1439 		seq_printf(seq, "%-10d", i);
1440 		seq_printf(seq, "%d|%-3u|", se->type, se->valid_blocks);
1441 		for (j = 0; j < SIT_VBLOCK_MAP_SIZE; j++)
1442 			seq_printf(seq, " %.2x", se->cur_valid_map[j]);
1443 		seq_putc(seq, '\n');
1444 	}
1445 	return 0;
1446 }
1447 
1448 static int __maybe_unused victim_bits_seq_show(struct seq_file *seq,
1449 						void *offset)
1450 {
1451 	struct super_block *sb = seq->private;
1452 	struct f2fs_sb_info *sbi = F2FS_SB(sb);
1453 	struct dirty_seglist_info *dirty_i = DIRTY_I(sbi);
1454 	int i;
1455 
1456 	seq_puts(seq, "format: victim_secmap bitmaps\n");
1457 
1458 	for (i = 0; i < MAIN_SECS(sbi); i++) {
1459 		if ((i % 10) == 0)
1460 			seq_printf(seq, "%-10d", i);
1461 		seq_printf(seq, "%d", test_bit(i, dirty_i->victim_secmap) ? 1 : 0);
1462 		if ((i % 10) == 9 || i == (MAIN_SECS(sbi) - 1))
1463 			seq_putc(seq, '\n');
1464 		else
1465 			seq_putc(seq, ' ');
1466 	}
1467 	return 0;
1468 }
1469 
1470 static int __maybe_unused discard_plist_seq_show(struct seq_file *seq,
1471 						void *offset)
1472 {
1473 	struct super_block *sb = seq->private;
1474 	struct f2fs_sb_info *sbi = F2FS_SB(sb);
1475 	struct discard_cmd_control *dcc = SM_I(sbi)->dcc_info;
1476 	int i, count;
1477 
1478 	seq_puts(seq, "Discard pend list(Show diacrd_cmd count on each entry, .:not exist):\n");
1479 	if (!f2fs_realtime_discard_enable(sbi))
1480 		return 0;
1481 
1482 	if (dcc) {
1483 		mutex_lock(&dcc->cmd_lock);
1484 		for (i = 0; i < MAX_PLIST_NUM; i++) {
1485 			struct list_head *pend_list;
1486 			struct discard_cmd *dc, *tmp;
1487 
1488 			if (i % 8 == 0)
1489 				seq_printf(seq, "  %-3d", i);
1490 			count = 0;
1491 			pend_list = &dcc->pend_list[i];
1492 			list_for_each_entry_safe(dc, tmp, pend_list, list)
1493 				count++;
1494 			if (count)
1495 				seq_printf(seq, " %7d", count);
1496 			else
1497 				seq_puts(seq, "       .");
1498 			if (i % 8 == 7)
1499 				seq_putc(seq, '\n');
1500 		}
1501 		seq_putc(seq, '\n');
1502 		mutex_unlock(&dcc->cmd_lock);
1503 	}
1504 
1505 	return 0;
1506 }
1507 
1508 static int __maybe_unused disk_map_seq_show(struct seq_file *seq,
1509 						void *offset)
1510 {
1511 	struct super_block *sb = seq->private;
1512 	struct f2fs_sb_info *sbi = F2FS_SB(sb);
1513 	int i;
1514 
1515 	seq_printf(seq, "Address Layout   : %5luB Block address (# of Segments)\n",
1516 					F2FS_BLKSIZE);
1517 	seq_printf(seq, " SB            : %12s\n", "0/1024B");
1518 	seq_printf(seq, " seg0_blkaddr  : 0x%010x\n", SEG0_BLKADDR(sbi));
1519 	seq_printf(seq, " Checkpoint    : 0x%010x (%10d)\n",
1520 			le32_to_cpu(F2FS_RAW_SUPER(sbi)->cp_blkaddr), 2);
1521 	seq_printf(seq, " SIT           : 0x%010x (%10d)\n",
1522 			SIT_I(sbi)->sit_base_addr,
1523 			le32_to_cpu(F2FS_RAW_SUPER(sbi)->segment_count_sit));
1524 	seq_printf(seq, " NAT           : 0x%010x (%10d)\n",
1525 			NM_I(sbi)->nat_blkaddr,
1526 			le32_to_cpu(F2FS_RAW_SUPER(sbi)->segment_count_nat));
1527 	seq_printf(seq, " SSA           : 0x%010x (%10d)\n",
1528 			SM_I(sbi)->ssa_blkaddr,
1529 			le32_to_cpu(F2FS_RAW_SUPER(sbi)->segment_count_ssa));
1530 	seq_printf(seq, " Main          : 0x%010x (%10d)\n",
1531 			SM_I(sbi)->main_blkaddr,
1532 			le32_to_cpu(F2FS_RAW_SUPER(sbi)->segment_count_main));
1533 	seq_printf(seq, " # of Sections : %12d\n",
1534 			le32_to_cpu(F2FS_RAW_SUPER(sbi)->section_count));
1535 	seq_printf(seq, " Segs/Sections : %12d\n",
1536 			SEGS_PER_SEC(sbi));
1537 	seq_printf(seq, " Section size  : %12d MB\n",
1538 			SEGS_PER_SEC(sbi) << 1);
1539 
1540 	if (!f2fs_is_multi_device(sbi))
1541 		return 0;
1542 
1543 	seq_puts(seq, "\nDisk Map for multi devices:\n");
1544 	for (i = 0; i < sbi->s_ndevs; i++)
1545 		seq_printf(seq, "Disk:%2d (zoned=%d): 0x%010x - 0x%010x on %s\n",
1546 			i, bdev_is_zoned(FDEV(i).bdev),
1547 			FDEV(i).start_blk, FDEV(i).end_blk,
1548 			FDEV(i).path);
1549 	return 0;
1550 }
1551 
1552 int __init f2fs_init_sysfs(void)
1553 {
1554 	int ret;
1555 
1556 	kobject_set_name(&f2fs_kset.kobj, "f2fs");
1557 	f2fs_kset.kobj.parent = fs_kobj;
1558 	ret = kset_register(&f2fs_kset);
1559 	if (ret)
1560 		return ret;
1561 
1562 	ret = kobject_init_and_add(&f2fs_feat, &f2fs_feat_ktype,
1563 				   NULL, "features");
1564 	if (ret)
1565 		goto put_kobject;
1566 
1567 	f2fs_proc_root = proc_mkdir("fs/f2fs", NULL);
1568 	if (!f2fs_proc_root) {
1569 		ret = -ENOMEM;
1570 		goto put_kobject;
1571 	}
1572 
1573 	return 0;
1574 put_kobject:
1575 	kobject_put(&f2fs_feat);
1576 	kset_unregister(&f2fs_kset);
1577 	return ret;
1578 }
1579 
1580 void f2fs_exit_sysfs(void)
1581 {
1582 	kobject_put(&f2fs_feat);
1583 	kset_unregister(&f2fs_kset);
1584 	remove_proc_entry("fs/f2fs", NULL);
1585 	f2fs_proc_root = NULL;
1586 }
1587 
1588 int f2fs_register_sysfs(struct f2fs_sb_info *sbi)
1589 {
1590 	struct super_block *sb = sbi->sb;
1591 	int err;
1592 
1593 	sbi->s_kobj.kset = &f2fs_kset;
1594 	init_completion(&sbi->s_kobj_unregister);
1595 	err = kobject_init_and_add(&sbi->s_kobj, &f2fs_sb_ktype, NULL,
1596 				"%s", sb->s_id);
1597 	if (err)
1598 		goto put_sb_kobj;
1599 
1600 	sbi->s_stat_kobj.kset = &f2fs_kset;
1601 	init_completion(&sbi->s_stat_kobj_unregister);
1602 	err = kobject_init_and_add(&sbi->s_stat_kobj, &f2fs_stat_ktype,
1603 						&sbi->s_kobj, "stat");
1604 	if (err)
1605 		goto put_stat_kobj;
1606 
1607 	sbi->s_feature_list_kobj.kset = &f2fs_kset;
1608 	init_completion(&sbi->s_feature_list_kobj_unregister);
1609 	err = kobject_init_and_add(&sbi->s_feature_list_kobj,
1610 					&f2fs_feature_list_ktype,
1611 					&sbi->s_kobj, "feature_list");
1612 	if (err)
1613 		goto put_feature_list_kobj;
1614 
1615 	sbi->s_proc = proc_mkdir(sb->s_id, f2fs_proc_root);
1616 	if (!sbi->s_proc) {
1617 		err = -ENOMEM;
1618 		goto put_feature_list_kobj;
1619 	}
1620 
1621 	proc_create_single_data("segment_info", 0444, sbi->s_proc,
1622 				segment_info_seq_show, sb);
1623 	proc_create_single_data("segment_bits", 0444, sbi->s_proc,
1624 				segment_bits_seq_show, sb);
1625 #ifdef CONFIG_F2FS_IOSTAT
1626 	proc_create_single_data("iostat_info", 0444, sbi->s_proc,
1627 				iostat_info_seq_show, sb);
1628 #endif
1629 	proc_create_single_data("victim_bits", 0444, sbi->s_proc,
1630 				victim_bits_seq_show, sb);
1631 	proc_create_single_data("discard_plist_info", 0444, sbi->s_proc,
1632 				discard_plist_seq_show, sb);
1633 	proc_create_single_data("disk_map", 0444, sbi->s_proc,
1634 				disk_map_seq_show, sb);
1635 	return 0;
1636 put_feature_list_kobj:
1637 	kobject_put(&sbi->s_feature_list_kobj);
1638 	wait_for_completion(&sbi->s_feature_list_kobj_unregister);
1639 put_stat_kobj:
1640 	kobject_put(&sbi->s_stat_kobj);
1641 	wait_for_completion(&sbi->s_stat_kobj_unregister);
1642 put_sb_kobj:
1643 	kobject_put(&sbi->s_kobj);
1644 	wait_for_completion(&sbi->s_kobj_unregister);
1645 	return err;
1646 }
1647 
1648 void f2fs_unregister_sysfs(struct f2fs_sb_info *sbi)
1649 {
1650 	remove_proc_subtree(sbi->sb->s_id, f2fs_proc_root);
1651 
1652 	kobject_put(&sbi->s_stat_kobj);
1653 	wait_for_completion(&sbi->s_stat_kobj_unregister);
1654 	kobject_put(&sbi->s_feature_list_kobj);
1655 	wait_for_completion(&sbi->s_feature_list_kobj_unregister);
1656 
1657 	kobject_put(&sbi->s_kobj);
1658 	wait_for_completion(&sbi->s_kobj_unregister);
1659 }
1660