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
issued_discard_show(struct f2fs_attr * a,struct f2fs_sb_info * sbi,char * buf)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
queued_discard_show(struct f2fs_attr * a,struct f2fs_sb_info * sbi,char * buf)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
undiscard_blks_show(struct f2fs_attr * a,struct f2fs_sb_info * sbi,char * buf)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
gc_mode_show(struct f2fs_attr * a,struct f2fs_sb_info * sbi,char * buf)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
features_show(struct f2fs_attr * a,struct f2fs_sb_info * sbi,char * buf)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
current_reserved_blocks_show(struct f2fs_attr * a,struct f2fs_sb_info * sbi,char * buf)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
unusable_show(struct f2fs_attr * a,struct f2fs_sb_info * sbi,char * buf)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
encoding_show(struct f2fs_attr * a,struct f2fs_sb_info * sbi,char * buf)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
mounted_time_sec_show(struct f2fs_attr * a,struct f2fs_sb_info * sbi,char * buf)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
moved_blocks_foreground_show(struct f2fs_attr * a,struct f2fs_sb_info * sbi,char * buf)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
moved_blocks_background_show(struct f2fs_attr * a,struct f2fs_sb_info * sbi,char * buf)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
avg_vblocks_show(struct f2fs_attr * a,struct f2fs_sb_info * sbi,char * buf)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
main_blkaddr_show(struct f2fs_attr * a,struct f2fs_sb_info * sbi,char * buf)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
f2fs_sbi_show(struct f2fs_attr * a,struct f2fs_sb_info * sbi,char * buf)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 data = IOPRIO_PRIO_DATA(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", data);
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
__sbi_store(struct f2fs_attr * a,struct f2fs_sb_info * sbi,const char * buf,size_t count)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 data;
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, &data);
465 if (ret)
466 return ret;
467 if (data >= IOPRIO_NR_LEVELS || data < 0)
468 return -EINVAL;
469
470 cprc->ckpt_thread_ioprio = IOPRIO_PRIO_VALUE(class, data);
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 && t >= BIT(FAULT_MAX))
488 return -EINVAL;
489 if (a->struct_type == FAULT_INFO_RATE && t >= UINT_MAX)
490 return -EINVAL;
491 #endif
492 if (a->struct_type == RESERVED_BLOCKS) {
493 spin_lock(&sbi->stat_lock);
494 if (t > (unsigned long)(sbi->user_block_count -
495 F2FS_OPTION(sbi).root_reserved_blocks -
496 sbi->blocks_per_seg *
497 SM_I(sbi)->additional_reserved_segments)) {
498 spin_unlock(&sbi->stat_lock);
499 return -EINVAL;
500 }
501 *ui = t;
502 sbi->current_reserved_blocks = min(sbi->reserved_blocks,
503 sbi->user_block_count - valid_user_blocks(sbi));
504 spin_unlock(&sbi->stat_lock);
505 return count;
506 }
507
508 if (!strcmp(a->attr.name, "discard_io_aware_gran")) {
509 if (t > MAX_PLIST_NUM)
510 return -EINVAL;
511 if (!f2fs_block_unit_discard(sbi))
512 return -EINVAL;
513 if (t == *ui)
514 return count;
515 *ui = t;
516 return count;
517 }
518
519 if (!strcmp(a->attr.name, "discard_granularity")) {
520 if (t == 0 || t > MAX_PLIST_NUM)
521 return -EINVAL;
522 if (!f2fs_block_unit_discard(sbi))
523 return -EINVAL;
524 if (t == *ui)
525 return count;
526 *ui = t;
527 return count;
528 }
529
530 if (!strcmp(a->attr.name, "max_ordered_discard")) {
531 if (t == 0 || t > MAX_PLIST_NUM)
532 return -EINVAL;
533 if (!f2fs_block_unit_discard(sbi))
534 return -EINVAL;
535 *ui = t;
536 return count;
537 }
538
539 if (!strcmp(a->attr.name, "discard_urgent_util")) {
540 if (t > 100)
541 return -EINVAL;
542 *ui = t;
543 return count;
544 }
545
546 if (!strcmp(a->attr.name, "discard_io_aware")) {
547 if (t >= DPOLICY_IO_AWARE_MAX)
548 return -EINVAL;
549 *ui = t;
550 return count;
551 }
552
553 if (!strcmp(a->attr.name, "migration_granularity")) {
554 if (t == 0 || t > sbi->segs_per_sec)
555 return -EINVAL;
556 }
557
558 if (!strcmp(a->attr.name, "gc_urgent")) {
559 if (t == 0) {
560 sbi->gc_mode = GC_NORMAL;
561 } else if (t == 1) {
562 sbi->gc_mode = GC_URGENT_HIGH;
563 if (sbi->gc_thread) {
564 sbi->gc_thread->gc_wake = true;
565 wake_up_interruptible_all(
566 &sbi->gc_thread->gc_wait_queue_head);
567 wake_up_discard_thread(sbi, true);
568 }
569 } else if (t == 2) {
570 sbi->gc_mode = GC_URGENT_LOW;
571 } else if (t == 3) {
572 sbi->gc_mode = GC_URGENT_MID;
573 if (sbi->gc_thread) {
574 sbi->gc_thread->gc_wake = true;
575 wake_up_interruptible_all(
576 &sbi->gc_thread->gc_wait_queue_head);
577 }
578 } else {
579 return -EINVAL;
580 }
581 return count;
582 }
583 if (!strcmp(a->attr.name, "gc_idle")) {
584 if (t == GC_IDLE_CB) {
585 sbi->gc_mode = GC_IDLE_CB;
586 } else if (t == GC_IDLE_GREEDY) {
587 sbi->gc_mode = GC_IDLE_GREEDY;
588 } else if (t == GC_IDLE_AT) {
589 if (!sbi->am.atgc_enabled)
590 return -EINVAL;
591 sbi->gc_mode = GC_IDLE_AT;
592 } else {
593 sbi->gc_mode = GC_NORMAL;
594 }
595 return count;
596 }
597
598 if (!strcmp(a->attr.name, "gc_remaining_trials")) {
599 spin_lock(&sbi->gc_remaining_trials_lock);
600 sbi->gc_remaining_trials = t;
601 spin_unlock(&sbi->gc_remaining_trials_lock);
602
603 return count;
604 }
605
606 #ifdef CONFIG_F2FS_IOSTAT
607 if (!strcmp(a->attr.name, "iostat_enable")) {
608 sbi->iostat_enable = !!t;
609 if (!sbi->iostat_enable)
610 f2fs_reset_iostat(sbi);
611 return count;
612 }
613
614 if (!strcmp(a->attr.name, "iostat_period_ms")) {
615 if (t < MIN_IOSTAT_PERIOD_MS || t > MAX_IOSTAT_PERIOD_MS)
616 return -EINVAL;
617 spin_lock_irq(&sbi->iostat_lock);
618 sbi->iostat_period_ms = (unsigned int)t;
619 spin_unlock_irq(&sbi->iostat_lock);
620 return count;
621 }
622 #endif
623
624 #ifdef CONFIG_F2FS_FS_COMPRESSION
625 if (!strcmp(a->attr.name, "compr_written_block") ||
626 !strcmp(a->attr.name, "compr_saved_block")) {
627 if (t != 0)
628 return -EINVAL;
629 sbi->compr_written_block = 0;
630 sbi->compr_saved_block = 0;
631 return count;
632 }
633
634 if (!strcmp(a->attr.name, "compr_new_inode")) {
635 if (t != 0)
636 return -EINVAL;
637 sbi->compr_new_inode = 0;
638 return count;
639 }
640
641 if (!strcmp(a->attr.name, "compress_percent")) {
642 if (t == 0 || t > 100)
643 return -EINVAL;
644 *ui = t;
645 return count;
646 }
647
648 if (!strcmp(a->attr.name, "compress_watermark")) {
649 if (t == 0 || t > 100)
650 return -EINVAL;
651 *ui = t;
652 return count;
653 }
654 #endif
655
656 if (!strcmp(a->attr.name, "atgc_candidate_ratio")) {
657 if (t > 100)
658 return -EINVAL;
659 sbi->am.candidate_ratio = t;
660 return count;
661 }
662
663 if (!strcmp(a->attr.name, "atgc_age_weight")) {
664 if (t > 100)
665 return -EINVAL;
666 sbi->am.age_weight = t;
667 return count;
668 }
669
670 if (!strcmp(a->attr.name, "gc_segment_mode")) {
671 if (t < MAX_GC_MODE)
672 sbi->gc_segment_mode = t;
673 else
674 return -EINVAL;
675 return count;
676 }
677
678 if (!strcmp(a->attr.name, "gc_reclaimed_segments")) {
679 if (t != 0)
680 return -EINVAL;
681 sbi->gc_reclaimed_segs[sbi->gc_segment_mode] = 0;
682 return count;
683 }
684
685 if (!strcmp(a->attr.name, "seq_file_ra_mul")) {
686 if (t >= MIN_RA_MUL && t <= MAX_RA_MUL)
687 sbi->seq_file_ra_mul = t;
688 else
689 return -EINVAL;
690 return count;
691 }
692
693 if (!strcmp(a->attr.name, "max_fragment_chunk")) {
694 if (t >= MIN_FRAGMENT_SIZE && t <= MAX_FRAGMENT_SIZE)
695 sbi->max_fragment_chunk = t;
696 else
697 return -EINVAL;
698 return count;
699 }
700
701 if (!strcmp(a->attr.name, "max_fragment_hole")) {
702 if (t >= MIN_FRAGMENT_SIZE && t <= MAX_FRAGMENT_SIZE)
703 sbi->max_fragment_hole = t;
704 else
705 return -EINVAL;
706 return count;
707 }
708
709 if (!strcmp(a->attr.name, "peak_atomic_write")) {
710 if (t != 0)
711 return -EINVAL;
712 sbi->peak_atomic_write = 0;
713 return count;
714 }
715
716 if (!strcmp(a->attr.name, "committed_atomic_block")) {
717 if (t != 0)
718 return -EINVAL;
719 sbi->committed_atomic_block = 0;
720 return count;
721 }
722
723 if (!strcmp(a->attr.name, "revoked_atomic_block")) {
724 if (t != 0)
725 return -EINVAL;
726 sbi->revoked_atomic_block = 0;
727 return count;
728 }
729
730 if (!strcmp(a->attr.name, "readdir_ra")) {
731 sbi->readdir_ra = !!t;
732 return count;
733 }
734
735 if (!strcmp(a->attr.name, "hot_data_age_threshold")) {
736 if (t == 0 || t >= sbi->warm_data_age_threshold)
737 return -EINVAL;
738 if (t == *ui)
739 return count;
740 *ui = (unsigned int)t;
741 return count;
742 }
743
744 if (!strcmp(a->attr.name, "warm_data_age_threshold")) {
745 if (t <= sbi->hot_data_age_threshold)
746 return -EINVAL;
747 if (t == *ui)
748 return count;
749 *ui = (unsigned int)t;
750 return count;
751 }
752
753 if (!strcmp(a->attr.name, "last_age_weight")) {
754 if (t > 100)
755 return -EINVAL;
756 if (t == *ui)
757 return count;
758 *ui = (unsigned int)t;
759 return count;
760 }
761
762 if (!strcmp(a->attr.name, "ipu_policy")) {
763 if (t >= BIT(F2FS_IPU_MAX))
764 return -EINVAL;
765 if (t && f2fs_lfs_mode(sbi))
766 return -EINVAL;
767 SM_I(sbi)->ipu_policy = (unsigned int)t;
768 return count;
769 }
770
771 if (!strcmp(a->attr.name, "dir_level")) {
772 if (t > MAX_DIR_HASH_DEPTH)
773 return -EINVAL;
774 sbi->dir_level = t;
775 return count;
776 }
777
778 *ui = (unsigned int)t;
779
780 return count;
781 }
782
f2fs_sbi_store(struct f2fs_attr * a,struct f2fs_sb_info * sbi,const char * buf,size_t count)783 static ssize_t f2fs_sbi_store(struct f2fs_attr *a,
784 struct f2fs_sb_info *sbi,
785 const char *buf, size_t count)
786 {
787 ssize_t ret;
788 bool gc_entry = (!strcmp(a->attr.name, "gc_urgent") ||
789 a->struct_type == GC_THREAD);
790
791 if (gc_entry) {
792 if (!down_read_trylock(&sbi->sb->s_umount))
793 return -EAGAIN;
794 }
795 ret = __sbi_store(a, sbi, buf, count);
796 if (gc_entry)
797 up_read(&sbi->sb->s_umount);
798
799 return ret;
800 }
801
f2fs_attr_show(struct kobject * kobj,struct attribute * attr,char * buf)802 static ssize_t f2fs_attr_show(struct kobject *kobj,
803 struct attribute *attr, char *buf)
804 {
805 struct f2fs_sb_info *sbi = container_of(kobj, struct f2fs_sb_info,
806 s_kobj);
807 struct f2fs_attr *a = container_of(attr, struct f2fs_attr, attr);
808
809 return a->show ? a->show(a, sbi, buf) : 0;
810 }
811
f2fs_attr_store(struct kobject * kobj,struct attribute * attr,const char * buf,size_t len)812 static ssize_t f2fs_attr_store(struct kobject *kobj, struct attribute *attr,
813 const char *buf, size_t len)
814 {
815 struct f2fs_sb_info *sbi = container_of(kobj, struct f2fs_sb_info,
816 s_kobj);
817 struct f2fs_attr *a = container_of(attr, struct f2fs_attr, attr);
818
819 return a->store ? a->store(a, sbi, buf, len) : 0;
820 }
821
f2fs_sb_release(struct kobject * kobj)822 static void f2fs_sb_release(struct kobject *kobj)
823 {
824 struct f2fs_sb_info *sbi = container_of(kobj, struct f2fs_sb_info,
825 s_kobj);
826 complete(&sbi->s_kobj_unregister);
827 }
828
829 /*
830 * Note that there are three feature list entries:
831 * 1) /sys/fs/f2fs/features
832 * : shows runtime features supported by in-kernel f2fs along with Kconfig.
833 * - ref. F2FS_FEATURE_RO_ATTR()
834 *
835 * 2) /sys/fs/f2fs/$s_id/features <deprecated>
836 * : shows on-disk features enabled by mkfs.f2fs, used for old kernels. This
837 * won't add new feature anymore, and thus, users should check entries in 3)
838 * instead of this 2).
839 *
840 * 3) /sys/fs/f2fs/$s_id/feature_list
841 * : shows on-disk features enabled by mkfs.f2fs per instance, which follows
842 * sysfs entry rule where each entry should expose single value.
843 * This list covers old feature list provided by 2) and beyond. Therefore,
844 * please add new on-disk feature in this list only.
845 * - ref. F2FS_SB_FEATURE_RO_ATTR()
846 */
f2fs_feature_show(struct f2fs_attr * a,struct f2fs_sb_info * sbi,char * buf)847 static ssize_t f2fs_feature_show(struct f2fs_attr *a,
848 struct f2fs_sb_info *sbi, char *buf)
849 {
850 return sysfs_emit(buf, "supported\n");
851 }
852
853 #define F2FS_FEATURE_RO_ATTR(_name) \
854 static struct f2fs_attr f2fs_attr_##_name = { \
855 .attr = {.name = __stringify(_name), .mode = 0444 }, \
856 .show = f2fs_feature_show, \
857 }
858
f2fs_sb_feature_show(struct f2fs_attr * a,struct f2fs_sb_info * sbi,char * buf)859 static ssize_t f2fs_sb_feature_show(struct f2fs_attr *a,
860 struct f2fs_sb_info *sbi, char *buf)
861 {
862 if (F2FS_HAS_FEATURE(sbi, a->id))
863 return sysfs_emit(buf, "supported\n");
864 return sysfs_emit(buf, "unsupported\n");
865 }
866
867 #define F2FS_SB_FEATURE_RO_ATTR(_name, _feat) \
868 static struct f2fs_attr f2fs_attr_sb_##_name = { \
869 .attr = {.name = __stringify(_name), .mode = 0444 }, \
870 .show = f2fs_sb_feature_show, \
871 .id = F2FS_FEATURE_##_feat, \
872 }
873
874 #define F2FS_ATTR_OFFSET(_struct_type, _name, _mode, _show, _store, _offset) \
875 static struct f2fs_attr f2fs_attr_##_name = { \
876 .attr = {.name = __stringify(_name), .mode = _mode }, \
877 .show = _show, \
878 .store = _store, \
879 .struct_type = _struct_type, \
880 .offset = _offset \
881 }
882
883 #define F2FS_RO_ATTR(struct_type, struct_name, name, elname) \
884 F2FS_ATTR_OFFSET(struct_type, name, 0444, \
885 f2fs_sbi_show, NULL, \
886 offsetof(struct struct_name, elname))
887
888 #define F2FS_RW_ATTR(struct_type, struct_name, name, elname) \
889 F2FS_ATTR_OFFSET(struct_type, name, 0644, \
890 f2fs_sbi_show, f2fs_sbi_store, \
891 offsetof(struct struct_name, elname))
892
893 #define F2FS_GENERAL_RO_ATTR(name) \
894 static struct f2fs_attr f2fs_attr_##name = __ATTR(name, 0444, name##_show, NULL)
895
896 #ifdef CONFIG_F2FS_STAT_FS
897 #define STAT_INFO_RO_ATTR(name, elname) \
898 F2FS_RO_ATTR(STAT_INFO, f2fs_stat_info, name, elname)
899 #endif
900
901 #define GC_THREAD_RW_ATTR(name, elname) \
902 F2FS_RW_ATTR(GC_THREAD, f2fs_gc_kthread, name, elname)
903
904 #define SM_INFO_RW_ATTR(name, elname) \
905 F2FS_RW_ATTR(SM_INFO, f2fs_sm_info, name, elname)
906
907 #define SM_INFO_GENERAL_RW_ATTR(elname) \
908 SM_INFO_RW_ATTR(elname, elname)
909
910 #define DCC_INFO_RW_ATTR(name, elname) \
911 F2FS_RW_ATTR(DCC_INFO, discard_cmd_control, name, elname)
912
913 #define DCC_INFO_GENERAL_RW_ATTR(elname) \
914 DCC_INFO_RW_ATTR(elname, elname)
915
916 #define NM_INFO_RW_ATTR(name, elname) \
917 F2FS_RW_ATTR(NM_INFO, f2fs_nm_info, name, elname)
918
919 #define NM_INFO_GENERAL_RW_ATTR(elname) \
920 NM_INFO_RW_ATTR(elname, elname)
921
922 #define F2FS_SBI_RW_ATTR(name, elname) \
923 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, name, elname)
924
925 #define F2FS_SBI_GENERAL_RW_ATTR(elname) \
926 F2FS_SBI_RW_ATTR(elname, elname)
927
928 #define F2FS_SBI_GENERAL_RO_ATTR(elname) \
929 F2FS_RO_ATTR(F2FS_SBI, f2fs_sb_info, elname, elname)
930
931 #ifdef CONFIG_F2FS_FAULT_INJECTION
932 #define FAULT_INFO_GENERAL_RW_ATTR(type, elname) \
933 F2FS_RW_ATTR(type, f2fs_fault_info, elname, elname)
934 #endif
935
936 #define RESERVED_BLOCKS_GENERAL_RW_ATTR(elname) \
937 F2FS_RW_ATTR(RESERVED_BLOCKS, f2fs_sb_info, elname, elname)
938
939 #define CPRC_INFO_GENERAL_RW_ATTR(elname) \
940 F2FS_RW_ATTR(CPRC_INFO, ckpt_req_control, elname, elname)
941
942 #define ATGC_INFO_RW_ATTR(name, elname) \
943 F2FS_RW_ATTR(ATGC_INFO, atgc_management, name, elname)
944
945 /* GC_THREAD ATTR */
946 GC_THREAD_RW_ATTR(gc_urgent_sleep_time, urgent_sleep_time);
947 GC_THREAD_RW_ATTR(gc_min_sleep_time, min_sleep_time);
948 GC_THREAD_RW_ATTR(gc_max_sleep_time, max_sleep_time);
949 GC_THREAD_RW_ATTR(gc_no_gc_sleep_time, no_gc_sleep_time);
950
951 /* SM_INFO ATTR */
952 SM_INFO_RW_ATTR(reclaim_segments, rec_prefree_segments);
953 SM_INFO_GENERAL_RW_ATTR(ipu_policy);
954 SM_INFO_GENERAL_RW_ATTR(min_ipu_util);
955 SM_INFO_GENERAL_RW_ATTR(min_fsync_blocks);
956 SM_INFO_GENERAL_RW_ATTR(min_seq_blocks);
957 SM_INFO_GENERAL_RW_ATTR(min_hot_blocks);
958 SM_INFO_GENERAL_RW_ATTR(min_ssr_sections);
959
960 /* DCC_INFO ATTR */
961 DCC_INFO_RW_ATTR(max_small_discards, max_discards);
962 DCC_INFO_GENERAL_RW_ATTR(max_discard_request);
963 DCC_INFO_GENERAL_RW_ATTR(min_discard_issue_time);
964 DCC_INFO_GENERAL_RW_ATTR(mid_discard_issue_time);
965 DCC_INFO_GENERAL_RW_ATTR(max_discard_issue_time);
966 DCC_INFO_GENERAL_RW_ATTR(discard_io_aware_gran);
967 DCC_INFO_GENERAL_RW_ATTR(discard_urgent_util);
968 DCC_INFO_GENERAL_RW_ATTR(discard_granularity);
969 DCC_INFO_GENERAL_RW_ATTR(max_ordered_discard);
970 DCC_INFO_GENERAL_RW_ATTR(discard_io_aware);
971
972 /* NM_INFO ATTR */
973 NM_INFO_RW_ATTR(max_roll_forward_node_blocks, max_rf_node_blocks);
974 NM_INFO_GENERAL_RW_ATTR(ram_thresh);
975 NM_INFO_GENERAL_RW_ATTR(ra_nid_pages);
976 NM_INFO_GENERAL_RW_ATTR(dirty_nats_ratio);
977
978 /* F2FS_SBI ATTR */
979 F2FS_RW_ATTR(F2FS_SBI, f2fs_super_block, extension_list, extension_list);
980 F2FS_SBI_RW_ATTR(gc_idle, gc_mode);
981 F2FS_SBI_RW_ATTR(gc_urgent, gc_mode);
982 F2FS_SBI_RW_ATTR(cp_interval, interval_time[CP_TIME]);
983 F2FS_SBI_RW_ATTR(idle_interval, interval_time[REQ_TIME]);
984 F2FS_SBI_RW_ATTR(discard_idle_interval, interval_time[DISCARD_TIME]);
985 F2FS_SBI_RW_ATTR(gc_idle_interval, interval_time[GC_TIME]);
986 F2FS_SBI_RW_ATTR(umount_discard_timeout, interval_time[UMOUNT_DISCARD_TIMEOUT]);
987 F2FS_SBI_RW_ATTR(gc_pin_file_thresh, gc_pin_file_threshold);
988 F2FS_SBI_RW_ATTR(gc_reclaimed_segments, gc_reclaimed_segs);
989 F2FS_SBI_GENERAL_RW_ATTR(max_victim_search);
990 F2FS_SBI_GENERAL_RW_ATTR(migration_granularity);
991 F2FS_SBI_GENERAL_RW_ATTR(dir_level);
992 #ifdef CONFIG_F2FS_IOSTAT
993 F2FS_SBI_GENERAL_RW_ATTR(iostat_enable);
994 F2FS_SBI_GENERAL_RW_ATTR(iostat_period_ms);
995 #endif
996 F2FS_SBI_GENERAL_RW_ATTR(readdir_ra);
997 F2FS_SBI_GENERAL_RW_ATTR(max_io_bytes);
998 F2FS_SBI_GENERAL_RW_ATTR(data_io_flag);
999 F2FS_SBI_GENERAL_RW_ATTR(node_io_flag);
1000 F2FS_SBI_GENERAL_RW_ATTR(gc_remaining_trials);
1001 F2FS_SBI_GENERAL_RW_ATTR(seq_file_ra_mul);
1002 F2FS_SBI_GENERAL_RW_ATTR(gc_segment_mode);
1003 F2FS_SBI_GENERAL_RW_ATTR(max_fragment_chunk);
1004 F2FS_SBI_GENERAL_RW_ATTR(max_fragment_hole);
1005 #ifdef CONFIG_F2FS_FS_COMPRESSION
1006 F2FS_SBI_GENERAL_RW_ATTR(compr_written_block);
1007 F2FS_SBI_GENERAL_RW_ATTR(compr_saved_block);
1008 F2FS_SBI_GENERAL_RW_ATTR(compr_new_inode);
1009 F2FS_SBI_GENERAL_RW_ATTR(compress_percent);
1010 F2FS_SBI_GENERAL_RW_ATTR(compress_watermark);
1011 #endif
1012 /* atomic write */
1013 F2FS_SBI_GENERAL_RO_ATTR(current_atomic_write);
1014 F2FS_SBI_GENERAL_RW_ATTR(peak_atomic_write);
1015 F2FS_SBI_GENERAL_RW_ATTR(committed_atomic_block);
1016 F2FS_SBI_GENERAL_RW_ATTR(revoked_atomic_block);
1017 /* block age extent cache */
1018 F2FS_SBI_GENERAL_RW_ATTR(hot_data_age_threshold);
1019 F2FS_SBI_GENERAL_RW_ATTR(warm_data_age_threshold);
1020 F2FS_SBI_GENERAL_RW_ATTR(last_age_weight);
1021 #ifdef CONFIG_BLK_DEV_ZONED
1022 F2FS_SBI_GENERAL_RO_ATTR(unusable_blocks_per_sec);
1023 #endif
1024
1025 /* STAT_INFO ATTR */
1026 #ifdef CONFIG_F2FS_STAT_FS
1027 STAT_INFO_RO_ATTR(cp_foreground_calls, cp_call_count[FOREGROUND]);
1028 STAT_INFO_RO_ATTR(cp_background_calls, cp_call_count[BACKGROUND]);
1029 STAT_INFO_RO_ATTR(gc_foreground_calls, gc_call_count[FOREGROUND]);
1030 STAT_INFO_RO_ATTR(gc_background_calls, gc_call_count[BACKGROUND]);
1031 #endif
1032
1033 /* FAULT_INFO ATTR */
1034 #ifdef CONFIG_F2FS_FAULT_INJECTION
1035 FAULT_INFO_GENERAL_RW_ATTR(FAULT_INFO_RATE, inject_rate);
1036 FAULT_INFO_GENERAL_RW_ATTR(FAULT_INFO_TYPE, inject_type);
1037 #endif
1038
1039 /* RESERVED_BLOCKS ATTR */
1040 RESERVED_BLOCKS_GENERAL_RW_ATTR(reserved_blocks);
1041
1042 /* CPRC_INFO ATTR */
1043 CPRC_INFO_GENERAL_RW_ATTR(ckpt_thread_ioprio);
1044
1045 /* ATGC_INFO ATTR */
1046 ATGC_INFO_RW_ATTR(atgc_candidate_ratio, candidate_ratio);
1047 ATGC_INFO_RW_ATTR(atgc_candidate_count, max_candidate_count);
1048 ATGC_INFO_RW_ATTR(atgc_age_weight, age_weight);
1049 ATGC_INFO_RW_ATTR(atgc_age_threshold, age_threshold);
1050
1051 F2FS_GENERAL_RO_ATTR(dirty_segments);
1052 F2FS_GENERAL_RO_ATTR(free_segments);
1053 F2FS_GENERAL_RO_ATTR(ovp_segments);
1054 F2FS_GENERAL_RO_ATTR(lifetime_write_kbytes);
1055 F2FS_GENERAL_RO_ATTR(features);
1056 F2FS_GENERAL_RO_ATTR(current_reserved_blocks);
1057 F2FS_GENERAL_RO_ATTR(unusable);
1058 F2FS_GENERAL_RO_ATTR(encoding);
1059 F2FS_GENERAL_RO_ATTR(mounted_time_sec);
1060 F2FS_GENERAL_RO_ATTR(main_blkaddr);
1061 F2FS_GENERAL_RO_ATTR(pending_discard);
1062 F2FS_GENERAL_RO_ATTR(gc_mode);
1063 #ifdef CONFIG_F2FS_STAT_FS
1064 F2FS_GENERAL_RO_ATTR(moved_blocks_background);
1065 F2FS_GENERAL_RO_ATTR(moved_blocks_foreground);
1066 F2FS_GENERAL_RO_ATTR(avg_vblocks);
1067 #endif
1068
1069 #ifdef CONFIG_FS_ENCRYPTION
1070 F2FS_FEATURE_RO_ATTR(encryption);
1071 F2FS_FEATURE_RO_ATTR(test_dummy_encryption_v2);
1072 #if IS_ENABLED(CONFIG_UNICODE)
1073 F2FS_FEATURE_RO_ATTR(encrypted_casefold);
1074 #endif
1075 #endif /* CONFIG_FS_ENCRYPTION */
1076 #ifdef CONFIG_BLK_DEV_ZONED
1077 F2FS_FEATURE_RO_ATTR(block_zoned);
1078 #endif
1079 F2FS_FEATURE_RO_ATTR(atomic_write);
1080 F2FS_FEATURE_RO_ATTR(extra_attr);
1081 F2FS_FEATURE_RO_ATTR(project_quota);
1082 F2FS_FEATURE_RO_ATTR(inode_checksum);
1083 F2FS_FEATURE_RO_ATTR(flexible_inline_xattr);
1084 F2FS_FEATURE_RO_ATTR(quota_ino);
1085 F2FS_FEATURE_RO_ATTR(inode_crtime);
1086 F2FS_FEATURE_RO_ATTR(lost_found);
1087 #ifdef CONFIG_FS_VERITY
1088 F2FS_FEATURE_RO_ATTR(verity);
1089 #endif
1090 F2FS_FEATURE_RO_ATTR(sb_checksum);
1091 #if IS_ENABLED(CONFIG_UNICODE)
1092 F2FS_FEATURE_RO_ATTR(casefold);
1093 #endif
1094 F2FS_FEATURE_RO_ATTR(readonly);
1095 #ifdef CONFIG_F2FS_FS_COMPRESSION
1096 F2FS_FEATURE_RO_ATTR(compression);
1097 #endif
1098 F2FS_FEATURE_RO_ATTR(pin_file);
1099
1100 #define ATTR_LIST(name) (&f2fs_attr_##name.attr)
1101 static struct attribute *f2fs_attrs[] = {
1102 ATTR_LIST(gc_urgent_sleep_time),
1103 ATTR_LIST(gc_min_sleep_time),
1104 ATTR_LIST(gc_max_sleep_time),
1105 ATTR_LIST(gc_no_gc_sleep_time),
1106 ATTR_LIST(gc_idle),
1107 ATTR_LIST(gc_urgent),
1108 ATTR_LIST(reclaim_segments),
1109 ATTR_LIST(main_blkaddr),
1110 ATTR_LIST(max_small_discards),
1111 ATTR_LIST(max_discard_request),
1112 ATTR_LIST(min_discard_issue_time),
1113 ATTR_LIST(mid_discard_issue_time),
1114 ATTR_LIST(max_discard_issue_time),
1115 ATTR_LIST(discard_io_aware_gran),
1116 ATTR_LIST(discard_urgent_util),
1117 ATTR_LIST(discard_granularity),
1118 ATTR_LIST(max_ordered_discard),
1119 ATTR_LIST(discard_io_aware),
1120 ATTR_LIST(pending_discard),
1121 ATTR_LIST(gc_mode),
1122 ATTR_LIST(ipu_policy),
1123 ATTR_LIST(min_ipu_util),
1124 ATTR_LIST(min_fsync_blocks),
1125 ATTR_LIST(min_seq_blocks),
1126 ATTR_LIST(min_hot_blocks),
1127 ATTR_LIST(min_ssr_sections),
1128 ATTR_LIST(max_victim_search),
1129 ATTR_LIST(migration_granularity),
1130 ATTR_LIST(dir_level),
1131 ATTR_LIST(ram_thresh),
1132 ATTR_LIST(ra_nid_pages),
1133 ATTR_LIST(dirty_nats_ratio),
1134 ATTR_LIST(max_roll_forward_node_blocks),
1135 ATTR_LIST(cp_interval),
1136 ATTR_LIST(idle_interval),
1137 ATTR_LIST(discard_idle_interval),
1138 ATTR_LIST(gc_idle_interval),
1139 ATTR_LIST(umount_discard_timeout),
1140 #ifdef CONFIG_F2FS_IOSTAT
1141 ATTR_LIST(iostat_enable),
1142 ATTR_LIST(iostat_period_ms),
1143 #endif
1144 ATTR_LIST(readdir_ra),
1145 ATTR_LIST(max_io_bytes),
1146 ATTR_LIST(gc_pin_file_thresh),
1147 ATTR_LIST(extension_list),
1148 #ifdef CONFIG_F2FS_FAULT_INJECTION
1149 ATTR_LIST(inject_rate),
1150 ATTR_LIST(inject_type),
1151 #endif
1152 ATTR_LIST(data_io_flag),
1153 ATTR_LIST(node_io_flag),
1154 ATTR_LIST(gc_remaining_trials),
1155 ATTR_LIST(ckpt_thread_ioprio),
1156 ATTR_LIST(dirty_segments),
1157 ATTR_LIST(free_segments),
1158 ATTR_LIST(ovp_segments),
1159 ATTR_LIST(unusable),
1160 ATTR_LIST(lifetime_write_kbytes),
1161 ATTR_LIST(features),
1162 ATTR_LIST(reserved_blocks),
1163 ATTR_LIST(current_reserved_blocks),
1164 ATTR_LIST(encoding),
1165 ATTR_LIST(mounted_time_sec),
1166 #ifdef CONFIG_F2FS_STAT_FS
1167 ATTR_LIST(cp_foreground_calls),
1168 ATTR_LIST(cp_background_calls),
1169 ATTR_LIST(gc_foreground_calls),
1170 ATTR_LIST(gc_background_calls),
1171 ATTR_LIST(moved_blocks_foreground),
1172 ATTR_LIST(moved_blocks_background),
1173 ATTR_LIST(avg_vblocks),
1174 #endif
1175 #ifdef CONFIG_BLK_DEV_ZONED
1176 ATTR_LIST(unusable_blocks_per_sec),
1177 #endif
1178 #ifdef CONFIG_F2FS_FS_COMPRESSION
1179 ATTR_LIST(compr_written_block),
1180 ATTR_LIST(compr_saved_block),
1181 ATTR_LIST(compr_new_inode),
1182 ATTR_LIST(compress_percent),
1183 ATTR_LIST(compress_watermark),
1184 #endif
1185 /* For ATGC */
1186 ATTR_LIST(atgc_candidate_ratio),
1187 ATTR_LIST(atgc_candidate_count),
1188 ATTR_LIST(atgc_age_weight),
1189 ATTR_LIST(atgc_age_threshold),
1190 ATTR_LIST(seq_file_ra_mul),
1191 ATTR_LIST(gc_segment_mode),
1192 ATTR_LIST(gc_reclaimed_segments),
1193 ATTR_LIST(max_fragment_chunk),
1194 ATTR_LIST(max_fragment_hole),
1195 ATTR_LIST(current_atomic_write),
1196 ATTR_LIST(peak_atomic_write),
1197 ATTR_LIST(committed_atomic_block),
1198 ATTR_LIST(revoked_atomic_block),
1199 ATTR_LIST(hot_data_age_threshold),
1200 ATTR_LIST(warm_data_age_threshold),
1201 ATTR_LIST(last_age_weight),
1202 NULL,
1203 };
1204 ATTRIBUTE_GROUPS(f2fs);
1205
1206 static struct attribute *f2fs_feat_attrs[] = {
1207 #ifdef CONFIG_FS_ENCRYPTION
1208 ATTR_LIST(encryption),
1209 ATTR_LIST(test_dummy_encryption_v2),
1210 #if IS_ENABLED(CONFIG_UNICODE)
1211 ATTR_LIST(encrypted_casefold),
1212 #endif
1213 #endif /* CONFIG_FS_ENCRYPTION */
1214 #ifdef CONFIG_BLK_DEV_ZONED
1215 ATTR_LIST(block_zoned),
1216 #endif
1217 ATTR_LIST(atomic_write),
1218 ATTR_LIST(extra_attr),
1219 ATTR_LIST(project_quota),
1220 ATTR_LIST(inode_checksum),
1221 ATTR_LIST(flexible_inline_xattr),
1222 ATTR_LIST(quota_ino),
1223 ATTR_LIST(inode_crtime),
1224 ATTR_LIST(lost_found),
1225 #ifdef CONFIG_FS_VERITY
1226 ATTR_LIST(verity),
1227 #endif
1228 ATTR_LIST(sb_checksum),
1229 #if IS_ENABLED(CONFIG_UNICODE)
1230 ATTR_LIST(casefold),
1231 #endif
1232 ATTR_LIST(readonly),
1233 #ifdef CONFIG_F2FS_FS_COMPRESSION
1234 ATTR_LIST(compression),
1235 #endif
1236 ATTR_LIST(pin_file),
1237 NULL,
1238 };
1239 ATTRIBUTE_GROUPS(f2fs_feat);
1240
1241 F2FS_GENERAL_RO_ATTR(sb_status);
1242 F2FS_GENERAL_RO_ATTR(cp_status);
1243 F2FS_GENERAL_RO_ATTR(issued_discard);
1244 F2FS_GENERAL_RO_ATTR(queued_discard);
1245 F2FS_GENERAL_RO_ATTR(undiscard_blks);
1246
1247 static struct attribute *f2fs_stat_attrs[] = {
1248 ATTR_LIST(sb_status),
1249 ATTR_LIST(cp_status),
1250 ATTR_LIST(issued_discard),
1251 ATTR_LIST(queued_discard),
1252 ATTR_LIST(undiscard_blks),
1253 NULL,
1254 };
1255 ATTRIBUTE_GROUPS(f2fs_stat);
1256
1257 F2FS_SB_FEATURE_RO_ATTR(encryption, ENCRYPT);
1258 F2FS_SB_FEATURE_RO_ATTR(block_zoned, BLKZONED);
1259 F2FS_SB_FEATURE_RO_ATTR(extra_attr, EXTRA_ATTR);
1260 F2FS_SB_FEATURE_RO_ATTR(project_quota, PRJQUOTA);
1261 F2FS_SB_FEATURE_RO_ATTR(inode_checksum, INODE_CHKSUM);
1262 F2FS_SB_FEATURE_RO_ATTR(flexible_inline_xattr, FLEXIBLE_INLINE_XATTR);
1263 F2FS_SB_FEATURE_RO_ATTR(quota_ino, QUOTA_INO);
1264 F2FS_SB_FEATURE_RO_ATTR(inode_crtime, INODE_CRTIME);
1265 F2FS_SB_FEATURE_RO_ATTR(lost_found, LOST_FOUND);
1266 F2FS_SB_FEATURE_RO_ATTR(verity, VERITY);
1267 F2FS_SB_FEATURE_RO_ATTR(sb_checksum, SB_CHKSUM);
1268 F2FS_SB_FEATURE_RO_ATTR(casefold, CASEFOLD);
1269 F2FS_SB_FEATURE_RO_ATTR(compression, COMPRESSION);
1270 F2FS_SB_FEATURE_RO_ATTR(readonly, RO);
1271
1272 static struct attribute *f2fs_sb_feat_attrs[] = {
1273 ATTR_LIST(sb_encryption),
1274 ATTR_LIST(sb_block_zoned),
1275 ATTR_LIST(sb_extra_attr),
1276 ATTR_LIST(sb_project_quota),
1277 ATTR_LIST(sb_inode_checksum),
1278 ATTR_LIST(sb_flexible_inline_xattr),
1279 ATTR_LIST(sb_quota_ino),
1280 ATTR_LIST(sb_inode_crtime),
1281 ATTR_LIST(sb_lost_found),
1282 ATTR_LIST(sb_verity),
1283 ATTR_LIST(sb_sb_checksum),
1284 ATTR_LIST(sb_casefold),
1285 ATTR_LIST(sb_compression),
1286 ATTR_LIST(sb_readonly),
1287 NULL,
1288 };
1289 ATTRIBUTE_GROUPS(f2fs_sb_feat);
1290
1291 static const struct sysfs_ops f2fs_attr_ops = {
1292 .show = f2fs_attr_show,
1293 .store = f2fs_attr_store,
1294 };
1295
1296 static const struct kobj_type f2fs_sb_ktype = {
1297 .default_groups = f2fs_groups,
1298 .sysfs_ops = &f2fs_attr_ops,
1299 .release = f2fs_sb_release,
1300 };
1301
1302 static const struct kobj_type f2fs_ktype = {
1303 .sysfs_ops = &f2fs_attr_ops,
1304 };
1305
1306 static struct kset f2fs_kset = {
1307 .kobj = {.ktype = &f2fs_ktype},
1308 };
1309
1310 static const struct kobj_type f2fs_feat_ktype = {
1311 .default_groups = f2fs_feat_groups,
1312 .sysfs_ops = &f2fs_attr_ops,
1313 };
1314
1315 static struct kobject f2fs_feat = {
1316 .kset = &f2fs_kset,
1317 };
1318
f2fs_stat_attr_show(struct kobject * kobj,struct attribute * attr,char * buf)1319 static ssize_t f2fs_stat_attr_show(struct kobject *kobj,
1320 struct attribute *attr, char *buf)
1321 {
1322 struct f2fs_sb_info *sbi = container_of(kobj, struct f2fs_sb_info,
1323 s_stat_kobj);
1324 struct f2fs_attr *a = container_of(attr, struct f2fs_attr, attr);
1325
1326 return a->show ? a->show(a, sbi, buf) : 0;
1327 }
1328
f2fs_stat_attr_store(struct kobject * kobj,struct attribute * attr,const char * buf,size_t len)1329 static ssize_t f2fs_stat_attr_store(struct kobject *kobj, struct attribute *attr,
1330 const char *buf, size_t len)
1331 {
1332 struct f2fs_sb_info *sbi = container_of(kobj, struct f2fs_sb_info,
1333 s_stat_kobj);
1334 struct f2fs_attr *a = container_of(attr, struct f2fs_attr, attr);
1335
1336 return a->store ? a->store(a, sbi, buf, len) : 0;
1337 }
1338
f2fs_stat_kobj_release(struct kobject * kobj)1339 static void f2fs_stat_kobj_release(struct kobject *kobj)
1340 {
1341 struct f2fs_sb_info *sbi = container_of(kobj, struct f2fs_sb_info,
1342 s_stat_kobj);
1343 complete(&sbi->s_stat_kobj_unregister);
1344 }
1345
1346 static const struct sysfs_ops f2fs_stat_attr_ops = {
1347 .show = f2fs_stat_attr_show,
1348 .store = f2fs_stat_attr_store,
1349 };
1350
1351 static const struct kobj_type f2fs_stat_ktype = {
1352 .default_groups = f2fs_stat_groups,
1353 .sysfs_ops = &f2fs_stat_attr_ops,
1354 .release = f2fs_stat_kobj_release,
1355 };
1356
f2fs_sb_feat_attr_show(struct kobject * kobj,struct attribute * attr,char * buf)1357 static ssize_t f2fs_sb_feat_attr_show(struct kobject *kobj,
1358 struct attribute *attr, char *buf)
1359 {
1360 struct f2fs_sb_info *sbi = container_of(kobj, struct f2fs_sb_info,
1361 s_feature_list_kobj);
1362 struct f2fs_attr *a = container_of(attr, struct f2fs_attr, attr);
1363
1364 return a->show ? a->show(a, sbi, buf) : 0;
1365 }
1366
f2fs_feature_list_kobj_release(struct kobject * kobj)1367 static void f2fs_feature_list_kobj_release(struct kobject *kobj)
1368 {
1369 struct f2fs_sb_info *sbi = container_of(kobj, struct f2fs_sb_info,
1370 s_feature_list_kobj);
1371 complete(&sbi->s_feature_list_kobj_unregister);
1372 }
1373
1374 static const struct sysfs_ops f2fs_feature_list_attr_ops = {
1375 .show = f2fs_sb_feat_attr_show,
1376 };
1377
1378 static const struct kobj_type f2fs_feature_list_ktype = {
1379 .default_groups = f2fs_sb_feat_groups,
1380 .sysfs_ops = &f2fs_feature_list_attr_ops,
1381 .release = f2fs_feature_list_kobj_release,
1382 };
1383
segment_info_seq_show(struct seq_file * seq,void * offset)1384 static int __maybe_unused segment_info_seq_show(struct seq_file *seq,
1385 void *offset)
1386 {
1387 struct super_block *sb = seq->private;
1388 struct f2fs_sb_info *sbi = F2FS_SB(sb);
1389 unsigned int total_segs =
1390 le32_to_cpu(sbi->raw_super->segment_count_main);
1391 int i;
1392
1393 seq_puts(seq, "format: segment_type|valid_blocks\n"
1394 "segment_type(0:HD, 1:WD, 2:CD, 3:HN, 4:WN, 5:CN)\n");
1395
1396 for (i = 0; i < total_segs; i++) {
1397 struct seg_entry *se = get_seg_entry(sbi, i);
1398
1399 if ((i % 10) == 0)
1400 seq_printf(seq, "%-10d", i);
1401 seq_printf(seq, "%d|%-3u", se->type, se->valid_blocks);
1402 if ((i % 10) == 9 || i == (total_segs - 1))
1403 seq_putc(seq, '\n');
1404 else
1405 seq_putc(seq, ' ');
1406 }
1407
1408 return 0;
1409 }
1410
segment_bits_seq_show(struct seq_file * seq,void * offset)1411 static int __maybe_unused segment_bits_seq_show(struct seq_file *seq,
1412 void *offset)
1413 {
1414 struct super_block *sb = seq->private;
1415 struct f2fs_sb_info *sbi = F2FS_SB(sb);
1416 unsigned int total_segs =
1417 le32_to_cpu(sbi->raw_super->segment_count_main);
1418 int i, j;
1419
1420 seq_puts(seq, "format: segment_type|valid_blocks|bitmaps\n"
1421 "segment_type(0:HD, 1:WD, 2:CD, 3:HN, 4:WN, 5:CN)\n");
1422
1423 for (i = 0; i < total_segs; i++) {
1424 struct seg_entry *se = get_seg_entry(sbi, i);
1425
1426 seq_printf(seq, "%-10d", i);
1427 seq_printf(seq, "%d|%-3u|", se->type, se->valid_blocks);
1428 for (j = 0; j < SIT_VBLOCK_MAP_SIZE; j++)
1429 seq_printf(seq, " %.2x", se->cur_valid_map[j]);
1430 seq_putc(seq, '\n');
1431 }
1432 return 0;
1433 }
1434
victim_bits_seq_show(struct seq_file * seq,void * offset)1435 static int __maybe_unused victim_bits_seq_show(struct seq_file *seq,
1436 void *offset)
1437 {
1438 struct super_block *sb = seq->private;
1439 struct f2fs_sb_info *sbi = F2FS_SB(sb);
1440 struct dirty_seglist_info *dirty_i = DIRTY_I(sbi);
1441 int i;
1442
1443 seq_puts(seq, "format: victim_secmap bitmaps\n");
1444
1445 for (i = 0; i < MAIN_SECS(sbi); i++) {
1446 if ((i % 10) == 0)
1447 seq_printf(seq, "%-10d", i);
1448 seq_printf(seq, "%d", test_bit(i, dirty_i->victim_secmap) ? 1 : 0);
1449 if ((i % 10) == 9 || i == (MAIN_SECS(sbi) - 1))
1450 seq_putc(seq, '\n');
1451 else
1452 seq_putc(seq, ' ');
1453 }
1454 return 0;
1455 }
1456
discard_plist_seq_show(struct seq_file * seq,void * offset)1457 static int __maybe_unused discard_plist_seq_show(struct seq_file *seq,
1458 void *offset)
1459 {
1460 struct super_block *sb = seq->private;
1461 struct f2fs_sb_info *sbi = F2FS_SB(sb);
1462 struct discard_cmd_control *dcc = SM_I(sbi)->dcc_info;
1463 int i, count;
1464
1465 seq_puts(seq, "Discard pend list(Show diacrd_cmd count on each entry, .:not exist):\n");
1466 if (!f2fs_realtime_discard_enable(sbi))
1467 return 0;
1468
1469 if (dcc) {
1470 mutex_lock(&dcc->cmd_lock);
1471 for (i = 0; i < MAX_PLIST_NUM; i++) {
1472 struct list_head *pend_list;
1473 struct discard_cmd *dc, *tmp;
1474
1475 if (i % 8 == 0)
1476 seq_printf(seq, " %-3d", i);
1477 count = 0;
1478 pend_list = &dcc->pend_list[i];
1479 list_for_each_entry_safe(dc, tmp, pend_list, list)
1480 count++;
1481 if (count)
1482 seq_printf(seq, " %7d", count);
1483 else
1484 seq_puts(seq, " .");
1485 if (i % 8 == 7)
1486 seq_putc(seq, '\n');
1487 }
1488 seq_putc(seq, '\n');
1489 mutex_unlock(&dcc->cmd_lock);
1490 }
1491
1492 return 0;
1493 }
1494
f2fs_init_sysfs(void)1495 int __init f2fs_init_sysfs(void)
1496 {
1497 int ret;
1498
1499 kobject_set_name(&f2fs_kset.kobj, "f2fs");
1500 f2fs_kset.kobj.parent = fs_kobj;
1501 ret = kset_register(&f2fs_kset);
1502 if (ret)
1503 return ret;
1504
1505 ret = kobject_init_and_add(&f2fs_feat, &f2fs_feat_ktype,
1506 NULL, "features");
1507 if (ret)
1508 goto put_kobject;
1509
1510 f2fs_proc_root = proc_mkdir("fs/f2fs", NULL);
1511 if (!f2fs_proc_root) {
1512 ret = -ENOMEM;
1513 goto put_kobject;
1514 }
1515
1516 return 0;
1517 put_kobject:
1518 kobject_put(&f2fs_feat);
1519 kset_unregister(&f2fs_kset);
1520 return ret;
1521 }
1522
f2fs_exit_sysfs(void)1523 void f2fs_exit_sysfs(void)
1524 {
1525 kobject_put(&f2fs_feat);
1526 kset_unregister(&f2fs_kset);
1527 remove_proc_entry("fs/f2fs", NULL);
1528 f2fs_proc_root = NULL;
1529 }
1530
f2fs_register_sysfs(struct f2fs_sb_info * sbi)1531 int f2fs_register_sysfs(struct f2fs_sb_info *sbi)
1532 {
1533 struct super_block *sb = sbi->sb;
1534 int err;
1535
1536 sbi->s_kobj.kset = &f2fs_kset;
1537 init_completion(&sbi->s_kobj_unregister);
1538 err = kobject_init_and_add(&sbi->s_kobj, &f2fs_sb_ktype, NULL,
1539 "%s", sb->s_id);
1540 if (err)
1541 goto put_sb_kobj;
1542
1543 sbi->s_stat_kobj.kset = &f2fs_kset;
1544 init_completion(&sbi->s_stat_kobj_unregister);
1545 err = kobject_init_and_add(&sbi->s_stat_kobj, &f2fs_stat_ktype,
1546 &sbi->s_kobj, "stat");
1547 if (err)
1548 goto put_stat_kobj;
1549
1550 sbi->s_feature_list_kobj.kset = &f2fs_kset;
1551 init_completion(&sbi->s_feature_list_kobj_unregister);
1552 err = kobject_init_and_add(&sbi->s_feature_list_kobj,
1553 &f2fs_feature_list_ktype,
1554 &sbi->s_kobj, "feature_list");
1555 if (err)
1556 goto put_feature_list_kobj;
1557
1558 sbi->s_proc = proc_mkdir(sb->s_id, f2fs_proc_root);
1559 if (!sbi->s_proc) {
1560 err = -ENOMEM;
1561 goto put_feature_list_kobj;
1562 }
1563
1564 proc_create_single_data("segment_info", 0444, sbi->s_proc,
1565 segment_info_seq_show, sb);
1566 proc_create_single_data("segment_bits", 0444, sbi->s_proc,
1567 segment_bits_seq_show, sb);
1568 #ifdef CONFIG_F2FS_IOSTAT
1569 proc_create_single_data("iostat_info", 0444, sbi->s_proc,
1570 iostat_info_seq_show, sb);
1571 #endif
1572 proc_create_single_data("victim_bits", 0444, sbi->s_proc,
1573 victim_bits_seq_show, sb);
1574 proc_create_single_data("discard_plist_info", 0444, sbi->s_proc,
1575 discard_plist_seq_show, sb);
1576 return 0;
1577 put_feature_list_kobj:
1578 kobject_put(&sbi->s_feature_list_kobj);
1579 wait_for_completion(&sbi->s_feature_list_kobj_unregister);
1580 put_stat_kobj:
1581 kobject_put(&sbi->s_stat_kobj);
1582 wait_for_completion(&sbi->s_stat_kobj_unregister);
1583 put_sb_kobj:
1584 kobject_put(&sbi->s_kobj);
1585 wait_for_completion(&sbi->s_kobj_unregister);
1586 return err;
1587 }
1588
f2fs_unregister_sysfs(struct f2fs_sb_info * sbi)1589 void f2fs_unregister_sysfs(struct f2fs_sb_info *sbi)
1590 {
1591 remove_proc_subtree(sbi->sb->s_id, f2fs_proc_root);
1592
1593 kobject_put(&sbi->s_stat_kobj);
1594 wait_for_completion(&sbi->s_stat_kobj_unregister);
1595 kobject_put(&sbi->s_feature_list_kobj);
1596 wait_for_completion(&sbi->s_feature_list_kobj_unregister);
1597
1598 kobject_put(&sbi->s_kobj);
1599 wait_for_completion(&sbi->s_kobj_unregister);
1600 }
1601