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