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 level = IOPRIO_PRIO_LEVEL(cprc->ckpt_thread_ioprio);
344
345 if (class != IOPRIO_CLASS_RT && class != IOPRIO_CLASS_BE)
346 return -EINVAL;
347
348 return sysfs_emit(buf, "%s,%d\n",
349 class == IOPRIO_CLASS_RT ? "rt" : "be", level);
350 }
351
352 #ifdef CONFIG_F2FS_FS_COMPRESSION
353 if (!strcmp(a->attr.name, "compr_written_block"))
354 return sysfs_emit(buf, "%llu\n", sbi->compr_written_block);
355
356 if (!strcmp(a->attr.name, "compr_saved_block"))
357 return sysfs_emit(buf, "%llu\n", sbi->compr_saved_block);
358
359 if (!strcmp(a->attr.name, "compr_new_inode"))
360 return sysfs_emit(buf, "%u\n", sbi->compr_new_inode);
361 #endif
362
363 if (!strcmp(a->attr.name, "gc_segment_mode"))
364 return sysfs_emit(buf, "%u\n", sbi->gc_segment_mode);
365
366 if (!strcmp(a->attr.name, "gc_reclaimed_segments")) {
367 return sysfs_emit(buf, "%u\n",
368 sbi->gc_reclaimed_segs[sbi->gc_segment_mode]);
369 }
370
371 if (!strcmp(a->attr.name, "current_atomic_write")) {
372 s64 current_write = atomic64_read(&sbi->current_atomic_write);
373
374 return sysfs_emit(buf, "%lld\n", current_write);
375 }
376
377 if (!strcmp(a->attr.name, "peak_atomic_write"))
378 return sysfs_emit(buf, "%lld\n", sbi->peak_atomic_write);
379
380 if (!strcmp(a->attr.name, "committed_atomic_block"))
381 return sysfs_emit(buf, "%llu\n", sbi->committed_atomic_block);
382
383 if (!strcmp(a->attr.name, "revoked_atomic_block"))
384 return sysfs_emit(buf, "%llu\n", sbi->revoked_atomic_block);
385
386 #ifdef CONFIG_F2FS_STAT_FS
387 if (!strcmp(a->attr.name, "cp_foreground_calls"))
388 return sysfs_emit(buf, "%d\n",
389 atomic_read(&sbi->cp_call_count[TOTAL_CALL]) -
390 atomic_read(&sbi->cp_call_count[BACKGROUND]));
391 if (!strcmp(a->attr.name, "cp_background_calls"))
392 return sysfs_emit(buf, "%d\n",
393 atomic_read(&sbi->cp_call_count[BACKGROUND]));
394 #endif
395
396 ui = (unsigned int *)(ptr + a->offset);
397
398 return sysfs_emit(buf, "%u\n", *ui);
399 }
400
__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 level;
454 int ret;
455
456 if (!strncmp(name, "rt,", 3))
457 class = IOPRIO_CLASS_RT;
458 else if (!strncmp(name, "be,", 3))
459 class = IOPRIO_CLASS_BE;
460 else
461 return -EINVAL;
462
463 name += 3;
464 ret = kstrtol(name, 10, &level);
465 if (ret)
466 return ret;
467 if (level >= IOPRIO_NR_LEVELS || level < 0)
468 return -EINVAL;
469
470 cprc->ckpt_thread_ioprio = IOPRIO_PRIO_VALUE(class, level);
471 if (test_opt(sbi, MERGE_CHECKPOINT)) {
472 ret = set_task_ioprio(cprc->f2fs_issue_ckpt,
473 cprc->ckpt_thread_ioprio);
474 if (ret)
475 return ret;
476 }
477
478 return count;
479 }
480
481 ui = (unsigned int *)(ptr + a->offset);
482
483 ret = kstrtoul(skip_spaces(buf), 0, &t);
484 if (ret < 0)
485 return ret;
486 #ifdef CONFIG_F2FS_FAULT_INJECTION
487 if (a->struct_type == FAULT_INFO_TYPE) {
488 if (f2fs_build_fault_attr(sbi, 0, t))
489 return -EINVAL;
490 return count;
491 }
492 if (a->struct_type == FAULT_INFO_RATE) {
493 if (f2fs_build_fault_attr(sbi, t, 0))
494 return -EINVAL;
495 return count;
496 }
497 #endif
498 if (a->struct_type == RESERVED_BLOCKS) {
499 spin_lock(&sbi->stat_lock);
500 if (t > (unsigned long)(sbi->user_block_count -
501 F2FS_OPTION(sbi).root_reserved_blocks -
502 SEGS_TO_BLKS(sbi,
503 SM_I(sbi)->additional_reserved_segments))) {
504 spin_unlock(&sbi->stat_lock);
505 return -EINVAL;
506 }
507 *ui = t;
508 sbi->current_reserved_blocks = min(sbi->reserved_blocks,
509 sbi->user_block_count - valid_user_blocks(sbi));
510 spin_unlock(&sbi->stat_lock);
511 return count;
512 }
513
514 if (!strcmp(a->attr.name, "discard_io_aware_gran")) {
515 if (t > MAX_PLIST_NUM)
516 return -EINVAL;
517 if (!f2fs_block_unit_discard(sbi))
518 return -EINVAL;
519 if (t == *ui)
520 return count;
521 *ui = t;
522 return count;
523 }
524
525 if (!strcmp(a->attr.name, "discard_granularity")) {
526 if (t == 0 || t > MAX_PLIST_NUM)
527 return -EINVAL;
528 if (!f2fs_block_unit_discard(sbi))
529 return -EINVAL;
530 if (t == *ui)
531 return count;
532 *ui = t;
533 return count;
534 }
535
536 if (!strcmp(a->attr.name, "max_ordered_discard")) {
537 if (t == 0 || t > MAX_PLIST_NUM)
538 return -EINVAL;
539 if (!f2fs_block_unit_discard(sbi))
540 return -EINVAL;
541 *ui = t;
542 return count;
543 }
544
545 if (!strcmp(a->attr.name, "discard_urgent_util")) {
546 if (t > 100)
547 return -EINVAL;
548 *ui = t;
549 return count;
550 }
551
552 if (!strcmp(a->attr.name, "discard_io_aware")) {
553 if (t >= DPOLICY_IO_AWARE_MAX)
554 return -EINVAL;
555 *ui = t;
556 return count;
557 }
558
559 if (!strcmp(a->attr.name, "migration_granularity")) {
560 if (t == 0 || t > SEGS_PER_SEC(sbi))
561 return -EINVAL;
562 }
563
564 if (!strcmp(a->attr.name, "gc_urgent")) {
565 if (t == 0) {
566 sbi->gc_mode = GC_NORMAL;
567 } else if (t == 1) {
568 sbi->gc_mode = GC_URGENT_HIGH;
569 if (sbi->gc_thread) {
570 sbi->gc_thread->gc_wake = true;
571 wake_up_interruptible_all(
572 &sbi->gc_thread->gc_wait_queue_head);
573 wake_up_discard_thread(sbi, true);
574 }
575 } else if (t == 2) {
576 sbi->gc_mode = GC_URGENT_LOW;
577 } else if (t == 3) {
578 sbi->gc_mode = GC_URGENT_MID;
579 if (sbi->gc_thread) {
580 sbi->gc_thread->gc_wake = true;
581 wake_up_interruptible_all(
582 &sbi->gc_thread->gc_wait_queue_head);
583 }
584 } else {
585 return -EINVAL;
586 }
587 return count;
588 }
589 if (!strcmp(a->attr.name, "gc_idle")) {
590 if (t == GC_IDLE_CB) {
591 sbi->gc_mode = GC_IDLE_CB;
592 } else if (t == GC_IDLE_GREEDY) {
593 sbi->gc_mode = GC_IDLE_GREEDY;
594 } else if (t == GC_IDLE_AT) {
595 if (!sbi->am.atgc_enabled)
596 return -EINVAL;
597 sbi->gc_mode = GC_IDLE_AT;
598 } else {
599 sbi->gc_mode = GC_NORMAL;
600 }
601 return count;
602 }
603
604 if (!strcmp(a->attr.name, "gc_remaining_trials")) {
605 spin_lock(&sbi->gc_remaining_trials_lock);
606 sbi->gc_remaining_trials = t;
607 spin_unlock(&sbi->gc_remaining_trials_lock);
608
609 return count;
610 }
611
612 #ifdef CONFIG_F2FS_IOSTAT
613 if (!strcmp(a->attr.name, "iostat_enable")) {
614 sbi->iostat_enable = !!t;
615 if (!sbi->iostat_enable)
616 f2fs_reset_iostat(sbi);
617 return count;
618 }
619
620 if (!strcmp(a->attr.name, "iostat_period_ms")) {
621 if (t < MIN_IOSTAT_PERIOD_MS || t > MAX_IOSTAT_PERIOD_MS)
622 return -EINVAL;
623 spin_lock_irq(&sbi->iostat_lock);
624 sbi->iostat_period_ms = (unsigned int)t;
625 spin_unlock_irq(&sbi->iostat_lock);
626 return count;
627 }
628 #endif
629
630 #ifdef CONFIG_F2FS_FS_COMPRESSION
631 if (!strcmp(a->attr.name, "compr_written_block") ||
632 !strcmp(a->attr.name, "compr_saved_block")) {
633 if (t != 0)
634 return -EINVAL;
635 sbi->compr_written_block = 0;
636 sbi->compr_saved_block = 0;
637 return count;
638 }
639
640 if (!strcmp(a->attr.name, "compr_new_inode")) {
641 if (t != 0)
642 return -EINVAL;
643 sbi->compr_new_inode = 0;
644 return count;
645 }
646
647 if (!strcmp(a->attr.name, "compress_percent")) {
648 if (t == 0 || t > 100)
649 return -EINVAL;
650 *ui = t;
651 return count;
652 }
653
654 if (!strcmp(a->attr.name, "compress_watermark")) {
655 if (t == 0 || t > 100)
656 return -EINVAL;
657 *ui = t;
658 return count;
659 }
660 #endif
661
662 if (!strcmp(a->attr.name, "atgc_candidate_ratio")) {
663 if (t > 100)
664 return -EINVAL;
665 sbi->am.candidate_ratio = t;
666 return count;
667 }
668
669 if (!strcmp(a->attr.name, "atgc_age_weight")) {
670 if (t > 100)
671 return -EINVAL;
672 sbi->am.age_weight = t;
673 return count;
674 }
675
676 if (!strcmp(a->attr.name, "gc_segment_mode")) {
677 if (t < MAX_GC_MODE)
678 sbi->gc_segment_mode = t;
679 else
680 return -EINVAL;
681 return count;
682 }
683
684 if (!strcmp(a->attr.name, "gc_pin_file_threshold")) {
685 if (t > MAX_GC_FAILED_PINNED_FILES)
686 return -EINVAL;
687 sbi->gc_pin_file_threshold = t;
688 return count;
689 }
690
691 if (!strcmp(a->attr.name, "gc_reclaimed_segments")) {
692 if (t != 0)
693 return -EINVAL;
694 sbi->gc_reclaimed_segs[sbi->gc_segment_mode] = 0;
695 return count;
696 }
697
698 if (!strcmp(a->attr.name, "seq_file_ra_mul")) {
699 if (t >= MIN_RA_MUL && t <= MAX_RA_MUL)
700 sbi->seq_file_ra_mul = t;
701 else
702 return -EINVAL;
703 return count;
704 }
705
706 if (!strcmp(a->attr.name, "max_fragment_chunk")) {
707 if (t >= MIN_FRAGMENT_SIZE && t <= MAX_FRAGMENT_SIZE)
708 sbi->max_fragment_chunk = t;
709 else
710 return -EINVAL;
711 return count;
712 }
713
714 if (!strcmp(a->attr.name, "max_fragment_hole")) {
715 if (t >= MIN_FRAGMENT_SIZE && t <= MAX_FRAGMENT_SIZE)
716 sbi->max_fragment_hole = t;
717 else
718 return -EINVAL;
719 return count;
720 }
721
722 if (!strcmp(a->attr.name, "peak_atomic_write")) {
723 if (t != 0)
724 return -EINVAL;
725 sbi->peak_atomic_write = 0;
726 return count;
727 }
728
729 if (!strcmp(a->attr.name, "committed_atomic_block")) {
730 if (t != 0)
731 return -EINVAL;
732 sbi->committed_atomic_block = 0;
733 return count;
734 }
735
736 if (!strcmp(a->attr.name, "revoked_atomic_block")) {
737 if (t != 0)
738 return -EINVAL;
739 sbi->revoked_atomic_block = 0;
740 return count;
741 }
742
743 if (!strcmp(a->attr.name, "readdir_ra")) {
744 sbi->readdir_ra = !!t;
745 return count;
746 }
747
748 if (!strcmp(a->attr.name, "hot_data_age_threshold")) {
749 if (t == 0 || t >= sbi->warm_data_age_threshold)
750 return -EINVAL;
751 if (t == *ui)
752 return count;
753 *ui = (unsigned int)t;
754 return count;
755 }
756
757 if (!strcmp(a->attr.name, "warm_data_age_threshold")) {
758 if (t <= sbi->hot_data_age_threshold)
759 return -EINVAL;
760 if (t == *ui)
761 return count;
762 *ui = (unsigned int)t;
763 return count;
764 }
765
766 if (!strcmp(a->attr.name, "last_age_weight")) {
767 if (t > 100)
768 return -EINVAL;
769 if (t == *ui)
770 return count;
771 *ui = (unsigned int)t;
772 return count;
773 }
774
775 if (!strcmp(a->attr.name, "ipu_policy")) {
776 if (t >= BIT(F2FS_IPU_MAX))
777 return -EINVAL;
778 if (t && f2fs_lfs_mode(sbi))
779 return -EINVAL;
780 SM_I(sbi)->ipu_policy = (unsigned int)t;
781 return count;
782 }
783
784 if (!strcmp(a->attr.name, "dir_level")) {
785 if (t > MAX_DIR_HASH_DEPTH)
786 return -EINVAL;
787 sbi->dir_level = t;
788 return count;
789 }
790
791 *ui = (unsigned int)t;
792
793 return count;
794 }
795
f2fs_sbi_store(struct f2fs_attr * a,struct f2fs_sb_info * sbi,const char * buf,size_t count)796 static ssize_t f2fs_sbi_store(struct f2fs_attr *a,
797 struct f2fs_sb_info *sbi,
798 const char *buf, size_t count)
799 {
800 ssize_t ret;
801 bool gc_entry = (!strcmp(a->attr.name, "gc_urgent") ||
802 a->struct_type == GC_THREAD);
803
804 if (gc_entry) {
805 if (!down_read_trylock(&sbi->sb->s_umount))
806 return -EAGAIN;
807 }
808 ret = __sbi_store(a, sbi, buf, count);
809 if (gc_entry)
810 up_read(&sbi->sb->s_umount);
811
812 return ret;
813 }
814
f2fs_attr_show(struct kobject * kobj,struct attribute * attr,char * buf)815 static ssize_t f2fs_attr_show(struct kobject *kobj,
816 struct attribute *attr, char *buf)
817 {
818 struct f2fs_sb_info *sbi = container_of(kobj, struct f2fs_sb_info,
819 s_kobj);
820 struct f2fs_attr *a = container_of(attr, struct f2fs_attr, attr);
821
822 return a->show ? a->show(a, sbi, buf) : 0;
823 }
824
f2fs_attr_store(struct kobject * kobj,struct attribute * attr,const char * buf,size_t len)825 static ssize_t f2fs_attr_store(struct kobject *kobj, struct attribute *attr,
826 const char *buf, size_t len)
827 {
828 struct f2fs_sb_info *sbi = container_of(kobj, struct f2fs_sb_info,
829 s_kobj);
830 struct f2fs_attr *a = container_of(attr, struct f2fs_attr, attr);
831
832 return a->store ? a->store(a, sbi, buf, len) : 0;
833 }
834
f2fs_sb_release(struct kobject * kobj)835 static void f2fs_sb_release(struct kobject *kobj)
836 {
837 struct f2fs_sb_info *sbi = container_of(kobj, struct f2fs_sb_info,
838 s_kobj);
839 complete(&sbi->s_kobj_unregister);
840 }
841
842 /*
843 * Note that there are three feature list entries:
844 * 1) /sys/fs/f2fs/features
845 * : shows runtime features supported by in-kernel f2fs along with Kconfig.
846 * - ref. F2FS_FEATURE_RO_ATTR()
847 *
848 * 2) /sys/fs/f2fs/$s_id/features <deprecated>
849 * : shows on-disk features enabled by mkfs.f2fs, used for old kernels. This
850 * won't add new feature anymore, and thus, users should check entries in 3)
851 * instead of this 2).
852 *
853 * 3) /sys/fs/f2fs/$s_id/feature_list
854 * : shows on-disk features enabled by mkfs.f2fs per instance, which follows
855 * sysfs entry rule where each entry should expose single value.
856 * This list covers old feature list provided by 2) and beyond. Therefore,
857 * please add new on-disk feature in this list only.
858 * - ref. F2FS_SB_FEATURE_RO_ATTR()
859 */
f2fs_feature_show(struct f2fs_attr * a,struct f2fs_sb_info * sbi,char * buf)860 static ssize_t f2fs_feature_show(struct f2fs_attr *a,
861 struct f2fs_sb_info *sbi, char *buf)
862 {
863 return sysfs_emit(buf, "supported\n");
864 }
865
866 #define F2FS_FEATURE_RO_ATTR(_name) \
867 static struct f2fs_attr f2fs_attr_##_name = { \
868 .attr = {.name = __stringify(_name), .mode = 0444 }, \
869 .show = f2fs_feature_show, \
870 }
871
f2fs_sb_feature_show(struct f2fs_attr * a,struct f2fs_sb_info * sbi,char * buf)872 static ssize_t f2fs_sb_feature_show(struct f2fs_attr *a,
873 struct f2fs_sb_info *sbi, char *buf)
874 {
875 if (F2FS_HAS_FEATURE(sbi, a->id))
876 return sysfs_emit(buf, "supported\n");
877 return sysfs_emit(buf, "unsupported\n");
878 }
879
880 #define F2FS_SB_FEATURE_RO_ATTR(_name, _feat) \
881 static struct f2fs_attr f2fs_attr_sb_##_name = { \
882 .attr = {.name = __stringify(_name), .mode = 0444 }, \
883 .show = f2fs_sb_feature_show, \
884 .id = F2FS_FEATURE_##_feat, \
885 }
886
887 #define F2FS_ATTR_OFFSET(_struct_type, _name, _mode, _show, _store, _offset) \
888 static struct f2fs_attr f2fs_attr_##_name = { \
889 .attr = {.name = __stringify(_name), .mode = _mode }, \
890 .show = _show, \
891 .store = _store, \
892 .struct_type = _struct_type, \
893 .offset = _offset \
894 }
895
896 #define F2FS_RO_ATTR(struct_type, struct_name, name, elname) \
897 F2FS_ATTR_OFFSET(struct_type, name, 0444, \
898 f2fs_sbi_show, NULL, \
899 offsetof(struct struct_name, elname))
900
901 #define F2FS_RW_ATTR(struct_type, struct_name, name, elname) \
902 F2FS_ATTR_OFFSET(struct_type, name, 0644, \
903 f2fs_sbi_show, f2fs_sbi_store, \
904 offsetof(struct struct_name, elname))
905
906 #define F2FS_GENERAL_RO_ATTR(name) \
907 static struct f2fs_attr f2fs_attr_##name = __ATTR(name, 0444, name##_show, NULL)
908
909 #ifdef CONFIG_F2FS_STAT_FS
910 #define STAT_INFO_RO_ATTR(name, elname) \
911 F2FS_RO_ATTR(STAT_INFO, f2fs_stat_info, name, elname)
912 #endif
913
914 #define GC_THREAD_RW_ATTR(name, elname) \
915 F2FS_RW_ATTR(GC_THREAD, f2fs_gc_kthread, name, elname)
916
917 #define SM_INFO_RW_ATTR(name, elname) \
918 F2FS_RW_ATTR(SM_INFO, f2fs_sm_info, name, elname)
919
920 #define SM_INFO_GENERAL_RW_ATTR(elname) \
921 SM_INFO_RW_ATTR(elname, elname)
922
923 #define DCC_INFO_RW_ATTR(name, elname) \
924 F2FS_RW_ATTR(DCC_INFO, discard_cmd_control, name, elname)
925
926 #define DCC_INFO_GENERAL_RW_ATTR(elname) \
927 DCC_INFO_RW_ATTR(elname, elname)
928
929 #define NM_INFO_RW_ATTR(name, elname) \
930 F2FS_RW_ATTR(NM_INFO, f2fs_nm_info, name, elname)
931
932 #define NM_INFO_GENERAL_RW_ATTR(elname) \
933 NM_INFO_RW_ATTR(elname, elname)
934
935 #define F2FS_SBI_RW_ATTR(name, elname) \
936 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, name, elname)
937
938 #define F2FS_SBI_GENERAL_RW_ATTR(elname) \
939 F2FS_SBI_RW_ATTR(elname, elname)
940
941 #define F2FS_SBI_GENERAL_RO_ATTR(elname) \
942 F2FS_RO_ATTR(F2FS_SBI, f2fs_sb_info, elname, elname)
943
944 #ifdef CONFIG_F2FS_FAULT_INJECTION
945 #define FAULT_INFO_GENERAL_RW_ATTR(type, elname) \
946 F2FS_RW_ATTR(type, f2fs_fault_info, elname, elname)
947 #endif
948
949 #define RESERVED_BLOCKS_GENERAL_RW_ATTR(elname) \
950 F2FS_RW_ATTR(RESERVED_BLOCKS, f2fs_sb_info, elname, elname)
951
952 #define CPRC_INFO_GENERAL_RW_ATTR(elname) \
953 F2FS_RW_ATTR(CPRC_INFO, ckpt_req_control, elname, elname)
954
955 #define ATGC_INFO_RW_ATTR(name, elname) \
956 F2FS_RW_ATTR(ATGC_INFO, atgc_management, name, elname)
957
958 /* GC_THREAD ATTR */
959 GC_THREAD_RW_ATTR(gc_urgent_sleep_time, urgent_sleep_time);
960 GC_THREAD_RW_ATTR(gc_min_sleep_time, min_sleep_time);
961 GC_THREAD_RW_ATTR(gc_max_sleep_time, max_sleep_time);
962 GC_THREAD_RW_ATTR(gc_no_gc_sleep_time, no_gc_sleep_time);
963
964 /* SM_INFO ATTR */
965 SM_INFO_RW_ATTR(reclaim_segments, rec_prefree_segments);
966 SM_INFO_GENERAL_RW_ATTR(ipu_policy);
967 SM_INFO_GENERAL_RW_ATTR(min_ipu_util);
968 SM_INFO_GENERAL_RW_ATTR(min_fsync_blocks);
969 SM_INFO_GENERAL_RW_ATTR(min_seq_blocks);
970 SM_INFO_GENERAL_RW_ATTR(min_hot_blocks);
971 SM_INFO_GENERAL_RW_ATTR(min_ssr_sections);
972
973 /* DCC_INFO ATTR */
974 DCC_INFO_RW_ATTR(max_small_discards, max_discards);
975 DCC_INFO_GENERAL_RW_ATTR(max_discard_request);
976 DCC_INFO_GENERAL_RW_ATTR(min_discard_issue_time);
977 DCC_INFO_GENERAL_RW_ATTR(mid_discard_issue_time);
978 DCC_INFO_GENERAL_RW_ATTR(max_discard_issue_time);
979 DCC_INFO_GENERAL_RW_ATTR(discard_io_aware_gran);
980 DCC_INFO_GENERAL_RW_ATTR(discard_urgent_util);
981 DCC_INFO_GENERAL_RW_ATTR(discard_granularity);
982 DCC_INFO_GENERAL_RW_ATTR(max_ordered_discard);
983 DCC_INFO_GENERAL_RW_ATTR(discard_io_aware);
984
985 /* NM_INFO ATTR */
986 NM_INFO_RW_ATTR(max_roll_forward_node_blocks, max_rf_node_blocks);
987 NM_INFO_GENERAL_RW_ATTR(ram_thresh);
988 NM_INFO_GENERAL_RW_ATTR(ra_nid_pages);
989 NM_INFO_GENERAL_RW_ATTR(dirty_nats_ratio);
990
991 /* F2FS_SBI ATTR */
992 F2FS_RW_ATTR(F2FS_SBI, f2fs_super_block, extension_list, extension_list);
993 F2FS_SBI_RW_ATTR(gc_idle, gc_mode);
994 F2FS_SBI_RW_ATTR(gc_urgent, gc_mode);
995 F2FS_SBI_RW_ATTR(cp_interval, interval_time[CP_TIME]);
996 F2FS_SBI_RW_ATTR(idle_interval, interval_time[REQ_TIME]);
997 F2FS_SBI_RW_ATTR(discard_idle_interval, interval_time[DISCARD_TIME]);
998 F2FS_SBI_RW_ATTR(gc_idle_interval, interval_time[GC_TIME]);
999 F2FS_SBI_RW_ATTR(umount_discard_timeout, interval_time[UMOUNT_DISCARD_TIMEOUT]);
1000 F2FS_SBI_RW_ATTR(gc_pin_file_thresh, gc_pin_file_threshold);
1001 F2FS_SBI_RW_ATTR(gc_reclaimed_segments, gc_reclaimed_segs);
1002 F2FS_SBI_GENERAL_RW_ATTR(max_victim_search);
1003 F2FS_SBI_GENERAL_RW_ATTR(migration_granularity);
1004 F2FS_SBI_GENERAL_RW_ATTR(dir_level);
1005 #ifdef CONFIG_F2FS_IOSTAT
1006 F2FS_SBI_GENERAL_RW_ATTR(iostat_enable);
1007 F2FS_SBI_GENERAL_RW_ATTR(iostat_period_ms);
1008 #endif
1009 F2FS_SBI_GENERAL_RW_ATTR(readdir_ra);
1010 F2FS_SBI_GENERAL_RW_ATTR(max_io_bytes);
1011 F2FS_SBI_GENERAL_RW_ATTR(data_io_flag);
1012 F2FS_SBI_GENERAL_RW_ATTR(node_io_flag);
1013 F2FS_SBI_GENERAL_RW_ATTR(gc_remaining_trials);
1014 F2FS_SBI_GENERAL_RW_ATTR(seq_file_ra_mul);
1015 F2FS_SBI_GENERAL_RW_ATTR(gc_segment_mode);
1016 F2FS_SBI_GENERAL_RW_ATTR(max_fragment_chunk);
1017 F2FS_SBI_GENERAL_RW_ATTR(max_fragment_hole);
1018 #ifdef CONFIG_F2FS_FS_COMPRESSION
1019 F2FS_SBI_GENERAL_RW_ATTR(compr_written_block);
1020 F2FS_SBI_GENERAL_RW_ATTR(compr_saved_block);
1021 F2FS_SBI_GENERAL_RW_ATTR(compr_new_inode);
1022 F2FS_SBI_GENERAL_RW_ATTR(compress_percent);
1023 F2FS_SBI_GENERAL_RW_ATTR(compress_watermark);
1024 #endif
1025 /* atomic write */
1026 F2FS_SBI_GENERAL_RO_ATTR(current_atomic_write);
1027 F2FS_SBI_GENERAL_RW_ATTR(peak_atomic_write);
1028 F2FS_SBI_GENERAL_RW_ATTR(committed_atomic_block);
1029 F2FS_SBI_GENERAL_RW_ATTR(revoked_atomic_block);
1030 /* block age extent cache */
1031 F2FS_SBI_GENERAL_RW_ATTR(hot_data_age_threshold);
1032 F2FS_SBI_GENERAL_RW_ATTR(warm_data_age_threshold);
1033 F2FS_SBI_GENERAL_RW_ATTR(last_age_weight);
1034 #ifdef CONFIG_BLK_DEV_ZONED
1035 F2FS_SBI_GENERAL_RO_ATTR(unusable_blocks_per_sec);
1036 #endif
1037
1038 /* STAT_INFO ATTR */
1039 #ifdef CONFIG_F2FS_STAT_FS
1040 STAT_INFO_RO_ATTR(cp_foreground_calls, cp_call_count[FOREGROUND]);
1041 STAT_INFO_RO_ATTR(cp_background_calls, cp_call_count[BACKGROUND]);
1042 STAT_INFO_RO_ATTR(gc_foreground_calls, gc_call_count[FOREGROUND]);
1043 STAT_INFO_RO_ATTR(gc_background_calls, gc_call_count[BACKGROUND]);
1044 #endif
1045
1046 /* FAULT_INFO ATTR */
1047 #ifdef CONFIG_F2FS_FAULT_INJECTION
1048 FAULT_INFO_GENERAL_RW_ATTR(FAULT_INFO_RATE, inject_rate);
1049 FAULT_INFO_GENERAL_RW_ATTR(FAULT_INFO_TYPE, inject_type);
1050 #endif
1051
1052 /* RESERVED_BLOCKS ATTR */
1053 RESERVED_BLOCKS_GENERAL_RW_ATTR(reserved_blocks);
1054
1055 /* CPRC_INFO ATTR */
1056 CPRC_INFO_GENERAL_RW_ATTR(ckpt_thread_ioprio);
1057
1058 /* ATGC_INFO ATTR */
1059 ATGC_INFO_RW_ATTR(atgc_candidate_ratio, candidate_ratio);
1060 ATGC_INFO_RW_ATTR(atgc_candidate_count, max_candidate_count);
1061 ATGC_INFO_RW_ATTR(atgc_age_weight, age_weight);
1062 ATGC_INFO_RW_ATTR(atgc_age_threshold, age_threshold);
1063
1064 F2FS_GENERAL_RO_ATTR(dirty_segments);
1065 F2FS_GENERAL_RO_ATTR(free_segments);
1066 F2FS_GENERAL_RO_ATTR(ovp_segments);
1067 F2FS_GENERAL_RO_ATTR(lifetime_write_kbytes);
1068 F2FS_GENERAL_RO_ATTR(features);
1069 F2FS_GENERAL_RO_ATTR(current_reserved_blocks);
1070 F2FS_GENERAL_RO_ATTR(unusable);
1071 F2FS_GENERAL_RO_ATTR(encoding);
1072 F2FS_GENERAL_RO_ATTR(mounted_time_sec);
1073 F2FS_GENERAL_RO_ATTR(main_blkaddr);
1074 F2FS_GENERAL_RO_ATTR(pending_discard);
1075 F2FS_GENERAL_RO_ATTR(gc_mode);
1076 #ifdef CONFIG_F2FS_STAT_FS
1077 F2FS_GENERAL_RO_ATTR(moved_blocks_background);
1078 F2FS_GENERAL_RO_ATTR(moved_blocks_foreground);
1079 F2FS_GENERAL_RO_ATTR(avg_vblocks);
1080 #endif
1081
1082 #ifdef CONFIG_FS_ENCRYPTION
1083 F2FS_FEATURE_RO_ATTR(encryption);
1084 F2FS_FEATURE_RO_ATTR(test_dummy_encryption_v2);
1085 #if IS_ENABLED(CONFIG_UNICODE)
1086 F2FS_FEATURE_RO_ATTR(encrypted_casefold);
1087 #endif
1088 #endif /* CONFIG_FS_ENCRYPTION */
1089 #ifdef CONFIG_BLK_DEV_ZONED
1090 F2FS_FEATURE_RO_ATTR(block_zoned);
1091 #endif
1092 F2FS_FEATURE_RO_ATTR(atomic_write);
1093 F2FS_FEATURE_RO_ATTR(extra_attr);
1094 F2FS_FEATURE_RO_ATTR(project_quota);
1095 F2FS_FEATURE_RO_ATTR(inode_checksum);
1096 F2FS_FEATURE_RO_ATTR(flexible_inline_xattr);
1097 F2FS_FEATURE_RO_ATTR(quota_ino);
1098 F2FS_FEATURE_RO_ATTR(inode_crtime);
1099 F2FS_FEATURE_RO_ATTR(lost_found);
1100 #ifdef CONFIG_FS_VERITY
1101 F2FS_FEATURE_RO_ATTR(verity);
1102 #endif
1103 F2FS_FEATURE_RO_ATTR(sb_checksum);
1104 #if IS_ENABLED(CONFIG_UNICODE)
1105 F2FS_FEATURE_RO_ATTR(casefold);
1106 #endif
1107 F2FS_FEATURE_RO_ATTR(readonly);
1108 #ifdef CONFIG_F2FS_FS_COMPRESSION
1109 F2FS_FEATURE_RO_ATTR(compression);
1110 #endif
1111 F2FS_FEATURE_RO_ATTR(pin_file);
1112
1113 #define ATTR_LIST(name) (&f2fs_attr_##name.attr)
1114 static struct attribute *f2fs_attrs[] = {
1115 ATTR_LIST(gc_urgent_sleep_time),
1116 ATTR_LIST(gc_min_sleep_time),
1117 ATTR_LIST(gc_max_sleep_time),
1118 ATTR_LIST(gc_no_gc_sleep_time),
1119 ATTR_LIST(gc_idle),
1120 ATTR_LIST(gc_urgent),
1121 ATTR_LIST(reclaim_segments),
1122 ATTR_LIST(main_blkaddr),
1123 ATTR_LIST(max_small_discards),
1124 ATTR_LIST(max_discard_request),
1125 ATTR_LIST(min_discard_issue_time),
1126 ATTR_LIST(mid_discard_issue_time),
1127 ATTR_LIST(max_discard_issue_time),
1128 ATTR_LIST(discard_io_aware_gran),
1129 ATTR_LIST(discard_urgent_util),
1130 ATTR_LIST(discard_granularity),
1131 ATTR_LIST(max_ordered_discard),
1132 ATTR_LIST(discard_io_aware),
1133 ATTR_LIST(pending_discard),
1134 ATTR_LIST(gc_mode),
1135 ATTR_LIST(ipu_policy),
1136 ATTR_LIST(min_ipu_util),
1137 ATTR_LIST(min_fsync_blocks),
1138 ATTR_LIST(min_seq_blocks),
1139 ATTR_LIST(min_hot_blocks),
1140 ATTR_LIST(min_ssr_sections),
1141 ATTR_LIST(max_victim_search),
1142 ATTR_LIST(migration_granularity),
1143 ATTR_LIST(dir_level),
1144 ATTR_LIST(ram_thresh),
1145 ATTR_LIST(ra_nid_pages),
1146 ATTR_LIST(dirty_nats_ratio),
1147 ATTR_LIST(max_roll_forward_node_blocks),
1148 ATTR_LIST(cp_interval),
1149 ATTR_LIST(idle_interval),
1150 ATTR_LIST(discard_idle_interval),
1151 ATTR_LIST(gc_idle_interval),
1152 ATTR_LIST(umount_discard_timeout),
1153 #ifdef CONFIG_F2FS_IOSTAT
1154 ATTR_LIST(iostat_enable),
1155 ATTR_LIST(iostat_period_ms),
1156 #endif
1157 ATTR_LIST(readdir_ra),
1158 ATTR_LIST(max_io_bytes),
1159 ATTR_LIST(gc_pin_file_thresh),
1160 ATTR_LIST(extension_list),
1161 #ifdef CONFIG_F2FS_FAULT_INJECTION
1162 ATTR_LIST(inject_rate),
1163 ATTR_LIST(inject_type),
1164 #endif
1165 ATTR_LIST(data_io_flag),
1166 ATTR_LIST(node_io_flag),
1167 ATTR_LIST(gc_remaining_trials),
1168 ATTR_LIST(ckpt_thread_ioprio),
1169 ATTR_LIST(dirty_segments),
1170 ATTR_LIST(free_segments),
1171 ATTR_LIST(ovp_segments),
1172 ATTR_LIST(unusable),
1173 ATTR_LIST(lifetime_write_kbytes),
1174 ATTR_LIST(features),
1175 ATTR_LIST(reserved_blocks),
1176 ATTR_LIST(current_reserved_blocks),
1177 ATTR_LIST(encoding),
1178 ATTR_LIST(mounted_time_sec),
1179 #ifdef CONFIG_F2FS_STAT_FS
1180 ATTR_LIST(cp_foreground_calls),
1181 ATTR_LIST(cp_background_calls),
1182 ATTR_LIST(gc_foreground_calls),
1183 ATTR_LIST(gc_background_calls),
1184 ATTR_LIST(moved_blocks_foreground),
1185 ATTR_LIST(moved_blocks_background),
1186 ATTR_LIST(avg_vblocks),
1187 #endif
1188 #ifdef CONFIG_BLK_DEV_ZONED
1189 ATTR_LIST(unusable_blocks_per_sec),
1190 #endif
1191 #ifdef CONFIG_F2FS_FS_COMPRESSION
1192 ATTR_LIST(compr_written_block),
1193 ATTR_LIST(compr_saved_block),
1194 ATTR_LIST(compr_new_inode),
1195 ATTR_LIST(compress_percent),
1196 ATTR_LIST(compress_watermark),
1197 #endif
1198 /* For ATGC */
1199 ATTR_LIST(atgc_candidate_ratio),
1200 ATTR_LIST(atgc_candidate_count),
1201 ATTR_LIST(atgc_age_weight),
1202 ATTR_LIST(atgc_age_threshold),
1203 ATTR_LIST(seq_file_ra_mul),
1204 ATTR_LIST(gc_segment_mode),
1205 ATTR_LIST(gc_reclaimed_segments),
1206 ATTR_LIST(max_fragment_chunk),
1207 ATTR_LIST(max_fragment_hole),
1208 ATTR_LIST(current_atomic_write),
1209 ATTR_LIST(peak_atomic_write),
1210 ATTR_LIST(committed_atomic_block),
1211 ATTR_LIST(revoked_atomic_block),
1212 ATTR_LIST(hot_data_age_threshold),
1213 ATTR_LIST(warm_data_age_threshold),
1214 ATTR_LIST(last_age_weight),
1215 NULL,
1216 };
1217 ATTRIBUTE_GROUPS(f2fs);
1218
1219 static struct attribute *f2fs_feat_attrs[] = {
1220 #ifdef CONFIG_FS_ENCRYPTION
1221 ATTR_LIST(encryption),
1222 ATTR_LIST(test_dummy_encryption_v2),
1223 #if IS_ENABLED(CONFIG_UNICODE)
1224 ATTR_LIST(encrypted_casefold),
1225 #endif
1226 #endif /* CONFIG_FS_ENCRYPTION */
1227 #ifdef CONFIG_BLK_DEV_ZONED
1228 ATTR_LIST(block_zoned),
1229 #endif
1230 ATTR_LIST(atomic_write),
1231 ATTR_LIST(extra_attr),
1232 ATTR_LIST(project_quota),
1233 ATTR_LIST(inode_checksum),
1234 ATTR_LIST(flexible_inline_xattr),
1235 ATTR_LIST(quota_ino),
1236 ATTR_LIST(inode_crtime),
1237 ATTR_LIST(lost_found),
1238 #ifdef CONFIG_FS_VERITY
1239 ATTR_LIST(verity),
1240 #endif
1241 ATTR_LIST(sb_checksum),
1242 #if IS_ENABLED(CONFIG_UNICODE)
1243 ATTR_LIST(casefold),
1244 #endif
1245 ATTR_LIST(readonly),
1246 #ifdef CONFIG_F2FS_FS_COMPRESSION
1247 ATTR_LIST(compression),
1248 #endif
1249 ATTR_LIST(pin_file),
1250 NULL,
1251 };
1252 ATTRIBUTE_GROUPS(f2fs_feat);
1253
1254 F2FS_GENERAL_RO_ATTR(sb_status);
1255 F2FS_GENERAL_RO_ATTR(cp_status);
1256 F2FS_GENERAL_RO_ATTR(issued_discard);
1257 F2FS_GENERAL_RO_ATTR(queued_discard);
1258 F2FS_GENERAL_RO_ATTR(undiscard_blks);
1259
1260 static struct attribute *f2fs_stat_attrs[] = {
1261 ATTR_LIST(sb_status),
1262 ATTR_LIST(cp_status),
1263 ATTR_LIST(issued_discard),
1264 ATTR_LIST(queued_discard),
1265 ATTR_LIST(undiscard_blks),
1266 NULL,
1267 };
1268 ATTRIBUTE_GROUPS(f2fs_stat);
1269
1270 F2FS_SB_FEATURE_RO_ATTR(encryption, ENCRYPT);
1271 F2FS_SB_FEATURE_RO_ATTR(block_zoned, BLKZONED);
1272 F2FS_SB_FEATURE_RO_ATTR(extra_attr, EXTRA_ATTR);
1273 F2FS_SB_FEATURE_RO_ATTR(project_quota, PRJQUOTA);
1274 F2FS_SB_FEATURE_RO_ATTR(inode_checksum, INODE_CHKSUM);
1275 F2FS_SB_FEATURE_RO_ATTR(flexible_inline_xattr, FLEXIBLE_INLINE_XATTR);
1276 F2FS_SB_FEATURE_RO_ATTR(quota_ino, QUOTA_INO);
1277 F2FS_SB_FEATURE_RO_ATTR(inode_crtime, INODE_CRTIME);
1278 F2FS_SB_FEATURE_RO_ATTR(lost_found, LOST_FOUND);
1279 F2FS_SB_FEATURE_RO_ATTR(verity, VERITY);
1280 F2FS_SB_FEATURE_RO_ATTR(sb_checksum, SB_CHKSUM);
1281 F2FS_SB_FEATURE_RO_ATTR(casefold, CASEFOLD);
1282 F2FS_SB_FEATURE_RO_ATTR(compression, COMPRESSION);
1283 F2FS_SB_FEATURE_RO_ATTR(readonly, RO);
1284
1285 static struct attribute *f2fs_sb_feat_attrs[] = {
1286 ATTR_LIST(sb_encryption),
1287 ATTR_LIST(sb_block_zoned),
1288 ATTR_LIST(sb_extra_attr),
1289 ATTR_LIST(sb_project_quota),
1290 ATTR_LIST(sb_inode_checksum),
1291 ATTR_LIST(sb_flexible_inline_xattr),
1292 ATTR_LIST(sb_quota_ino),
1293 ATTR_LIST(sb_inode_crtime),
1294 ATTR_LIST(sb_lost_found),
1295 ATTR_LIST(sb_verity),
1296 ATTR_LIST(sb_sb_checksum),
1297 ATTR_LIST(sb_casefold),
1298 ATTR_LIST(sb_compression),
1299 ATTR_LIST(sb_readonly),
1300 NULL,
1301 };
1302 ATTRIBUTE_GROUPS(f2fs_sb_feat);
1303
1304 static const struct sysfs_ops f2fs_attr_ops = {
1305 .show = f2fs_attr_show,
1306 .store = f2fs_attr_store,
1307 };
1308
1309 static const struct kobj_type f2fs_sb_ktype = {
1310 .default_groups = f2fs_groups,
1311 .sysfs_ops = &f2fs_attr_ops,
1312 .release = f2fs_sb_release,
1313 };
1314
1315 static const struct kobj_type f2fs_ktype = {
1316 .sysfs_ops = &f2fs_attr_ops,
1317 };
1318
1319 static struct kset f2fs_kset = {
1320 .kobj = {.ktype = &f2fs_ktype},
1321 };
1322
1323 static const struct kobj_type f2fs_feat_ktype = {
1324 .default_groups = f2fs_feat_groups,
1325 .sysfs_ops = &f2fs_attr_ops,
1326 };
1327
1328 static struct kobject f2fs_feat = {
1329 .kset = &f2fs_kset,
1330 };
1331
f2fs_stat_attr_show(struct kobject * kobj,struct attribute * attr,char * buf)1332 static ssize_t f2fs_stat_attr_show(struct kobject *kobj,
1333 struct attribute *attr, char *buf)
1334 {
1335 struct f2fs_sb_info *sbi = container_of(kobj, struct f2fs_sb_info,
1336 s_stat_kobj);
1337 struct f2fs_attr *a = container_of(attr, struct f2fs_attr, attr);
1338
1339 return a->show ? a->show(a, sbi, buf) : 0;
1340 }
1341
f2fs_stat_attr_store(struct kobject * kobj,struct attribute * attr,const char * buf,size_t len)1342 static ssize_t f2fs_stat_attr_store(struct kobject *kobj, struct attribute *attr,
1343 const char *buf, size_t len)
1344 {
1345 struct f2fs_sb_info *sbi = container_of(kobj, struct f2fs_sb_info,
1346 s_stat_kobj);
1347 struct f2fs_attr *a = container_of(attr, struct f2fs_attr, attr);
1348
1349 return a->store ? a->store(a, sbi, buf, len) : 0;
1350 }
1351
f2fs_stat_kobj_release(struct kobject * kobj)1352 static void f2fs_stat_kobj_release(struct kobject *kobj)
1353 {
1354 struct f2fs_sb_info *sbi = container_of(kobj, struct f2fs_sb_info,
1355 s_stat_kobj);
1356 complete(&sbi->s_stat_kobj_unregister);
1357 }
1358
1359 static const struct sysfs_ops f2fs_stat_attr_ops = {
1360 .show = f2fs_stat_attr_show,
1361 .store = f2fs_stat_attr_store,
1362 };
1363
1364 static const struct kobj_type f2fs_stat_ktype = {
1365 .default_groups = f2fs_stat_groups,
1366 .sysfs_ops = &f2fs_stat_attr_ops,
1367 .release = f2fs_stat_kobj_release,
1368 };
1369
f2fs_sb_feat_attr_show(struct kobject * kobj,struct attribute * attr,char * buf)1370 static ssize_t f2fs_sb_feat_attr_show(struct kobject *kobj,
1371 struct attribute *attr, char *buf)
1372 {
1373 struct f2fs_sb_info *sbi = container_of(kobj, struct f2fs_sb_info,
1374 s_feature_list_kobj);
1375 struct f2fs_attr *a = container_of(attr, struct f2fs_attr, attr);
1376
1377 return a->show ? a->show(a, sbi, buf) : 0;
1378 }
1379
f2fs_feature_list_kobj_release(struct kobject * kobj)1380 static void f2fs_feature_list_kobj_release(struct kobject *kobj)
1381 {
1382 struct f2fs_sb_info *sbi = container_of(kobj, struct f2fs_sb_info,
1383 s_feature_list_kobj);
1384 complete(&sbi->s_feature_list_kobj_unregister);
1385 }
1386
1387 static const struct sysfs_ops f2fs_feature_list_attr_ops = {
1388 .show = f2fs_sb_feat_attr_show,
1389 };
1390
1391 static const struct kobj_type f2fs_feature_list_ktype = {
1392 .default_groups = f2fs_sb_feat_groups,
1393 .sysfs_ops = &f2fs_feature_list_attr_ops,
1394 .release = f2fs_feature_list_kobj_release,
1395 };
1396
segment_info_seq_show(struct seq_file * seq,void * offset)1397 static int __maybe_unused segment_info_seq_show(struct seq_file *seq,
1398 void *offset)
1399 {
1400 struct super_block *sb = seq->private;
1401 struct f2fs_sb_info *sbi = F2FS_SB(sb);
1402 unsigned int total_segs =
1403 le32_to_cpu(sbi->raw_super->segment_count_main);
1404 int i;
1405
1406 seq_puts(seq, "format: segment_type|valid_blocks\n"
1407 "segment_type(0:HD, 1:WD, 2:CD, 3:HN, 4:WN, 5:CN)\n");
1408
1409 for (i = 0; i < total_segs; i++) {
1410 struct seg_entry *se = get_seg_entry(sbi, i);
1411
1412 if ((i % 10) == 0)
1413 seq_printf(seq, "%-10d", i);
1414 seq_printf(seq, "%d|%-3u", se->type, se->valid_blocks);
1415 if ((i % 10) == 9 || i == (total_segs - 1))
1416 seq_putc(seq, '\n');
1417 else
1418 seq_putc(seq, ' ');
1419 }
1420
1421 return 0;
1422 }
1423
segment_bits_seq_show(struct seq_file * seq,void * offset)1424 static int __maybe_unused segment_bits_seq_show(struct seq_file *seq,
1425 void *offset)
1426 {
1427 struct super_block *sb = seq->private;
1428 struct f2fs_sb_info *sbi = F2FS_SB(sb);
1429 unsigned int total_segs =
1430 le32_to_cpu(sbi->raw_super->segment_count_main);
1431 int i, j;
1432
1433 seq_puts(seq, "format: segment_type|valid_blocks|bitmaps\n"
1434 "segment_type(0:HD, 1:WD, 2:CD, 3:HN, 4:WN, 5:CN)\n");
1435
1436 for (i = 0; i < total_segs; i++) {
1437 struct seg_entry *se = get_seg_entry(sbi, i);
1438
1439 seq_printf(seq, "%-10d", i);
1440 seq_printf(seq, "%d|%-3u|", se->type, se->valid_blocks);
1441 for (j = 0; j < SIT_VBLOCK_MAP_SIZE; j++)
1442 seq_printf(seq, " %.2x", se->cur_valid_map[j]);
1443 seq_putc(seq, '\n');
1444 }
1445 return 0;
1446 }
1447
victim_bits_seq_show(struct seq_file * seq,void * offset)1448 static int __maybe_unused victim_bits_seq_show(struct seq_file *seq,
1449 void *offset)
1450 {
1451 struct super_block *sb = seq->private;
1452 struct f2fs_sb_info *sbi = F2FS_SB(sb);
1453 struct dirty_seglist_info *dirty_i = DIRTY_I(sbi);
1454 int i;
1455
1456 seq_puts(seq, "format: victim_secmap bitmaps\n");
1457
1458 for (i = 0; i < MAIN_SECS(sbi); i++) {
1459 if ((i % 10) == 0)
1460 seq_printf(seq, "%-10d", i);
1461 seq_printf(seq, "%d", test_bit(i, dirty_i->victim_secmap) ? 1 : 0);
1462 if ((i % 10) == 9 || i == (MAIN_SECS(sbi) - 1))
1463 seq_putc(seq, '\n');
1464 else
1465 seq_putc(seq, ' ');
1466 }
1467 return 0;
1468 }
1469
discard_plist_seq_show(struct seq_file * seq,void * offset)1470 static int __maybe_unused discard_plist_seq_show(struct seq_file *seq,
1471 void *offset)
1472 {
1473 struct super_block *sb = seq->private;
1474 struct f2fs_sb_info *sbi = F2FS_SB(sb);
1475 struct discard_cmd_control *dcc = SM_I(sbi)->dcc_info;
1476 int i, count;
1477
1478 seq_puts(seq, "Discard pend list(Show diacrd_cmd count on each entry, .:not exist):\n");
1479 if (!f2fs_realtime_discard_enable(sbi))
1480 return 0;
1481
1482 if (dcc) {
1483 mutex_lock(&dcc->cmd_lock);
1484 for (i = 0; i < MAX_PLIST_NUM; i++) {
1485 struct list_head *pend_list;
1486 struct discard_cmd *dc, *tmp;
1487
1488 if (i % 8 == 0)
1489 seq_printf(seq, " %-3d", i);
1490 count = 0;
1491 pend_list = &dcc->pend_list[i];
1492 list_for_each_entry_safe(dc, tmp, pend_list, list)
1493 count++;
1494 if (count)
1495 seq_printf(seq, " %7d", count);
1496 else
1497 seq_puts(seq, " .");
1498 if (i % 8 == 7)
1499 seq_putc(seq, '\n');
1500 }
1501 seq_putc(seq, '\n');
1502 mutex_unlock(&dcc->cmd_lock);
1503 }
1504
1505 return 0;
1506 }
1507
disk_map_seq_show(struct seq_file * seq,void * offset)1508 static int __maybe_unused disk_map_seq_show(struct seq_file *seq,
1509 void *offset)
1510 {
1511 struct super_block *sb = seq->private;
1512 struct f2fs_sb_info *sbi = F2FS_SB(sb);
1513 int i;
1514
1515 seq_printf(seq, "Address Layout : %5luB Block address (# of Segments)\n",
1516 F2FS_BLKSIZE);
1517 seq_printf(seq, " SB : %12s\n", "0/1024B");
1518 seq_printf(seq, " seg0_blkaddr : 0x%010x\n", SEG0_BLKADDR(sbi));
1519 seq_printf(seq, " Checkpoint : 0x%010x (%10d)\n",
1520 le32_to_cpu(F2FS_RAW_SUPER(sbi)->cp_blkaddr), 2);
1521 seq_printf(seq, " SIT : 0x%010x (%10d)\n",
1522 SIT_I(sbi)->sit_base_addr,
1523 le32_to_cpu(F2FS_RAW_SUPER(sbi)->segment_count_sit));
1524 seq_printf(seq, " NAT : 0x%010x (%10d)\n",
1525 NM_I(sbi)->nat_blkaddr,
1526 le32_to_cpu(F2FS_RAW_SUPER(sbi)->segment_count_nat));
1527 seq_printf(seq, " SSA : 0x%010x (%10d)\n",
1528 SM_I(sbi)->ssa_blkaddr,
1529 le32_to_cpu(F2FS_RAW_SUPER(sbi)->segment_count_ssa));
1530 seq_printf(seq, " Main : 0x%010x (%10d)\n",
1531 SM_I(sbi)->main_blkaddr,
1532 le32_to_cpu(F2FS_RAW_SUPER(sbi)->segment_count_main));
1533 seq_printf(seq, " # of Sections : %12d\n",
1534 le32_to_cpu(F2FS_RAW_SUPER(sbi)->section_count));
1535 seq_printf(seq, " Segs/Sections : %12d\n",
1536 SEGS_PER_SEC(sbi));
1537 seq_printf(seq, " Section size : %12d MB\n",
1538 SEGS_PER_SEC(sbi) << 1);
1539
1540 if (!f2fs_is_multi_device(sbi))
1541 return 0;
1542
1543 seq_puts(seq, "\nDisk Map for multi devices:\n");
1544 for (i = 0; i < sbi->s_ndevs; i++)
1545 seq_printf(seq, "Disk:%2d (zoned=%d): 0x%010x - 0x%010x on %s\n",
1546 i, bdev_is_zoned(FDEV(i).bdev),
1547 FDEV(i).start_blk, FDEV(i).end_blk,
1548 FDEV(i).path);
1549 return 0;
1550 }
1551
f2fs_init_sysfs(void)1552 int __init f2fs_init_sysfs(void)
1553 {
1554 int ret;
1555
1556 kobject_set_name(&f2fs_kset.kobj, "f2fs");
1557 f2fs_kset.kobj.parent = fs_kobj;
1558 ret = kset_register(&f2fs_kset);
1559 if (ret)
1560 return ret;
1561
1562 ret = kobject_init_and_add(&f2fs_feat, &f2fs_feat_ktype,
1563 NULL, "features");
1564 if (ret)
1565 goto put_kobject;
1566
1567 f2fs_proc_root = proc_mkdir("fs/f2fs", NULL);
1568 if (!f2fs_proc_root) {
1569 ret = -ENOMEM;
1570 goto put_kobject;
1571 }
1572
1573 return 0;
1574 put_kobject:
1575 kobject_put(&f2fs_feat);
1576 kset_unregister(&f2fs_kset);
1577 return ret;
1578 }
1579
f2fs_exit_sysfs(void)1580 void f2fs_exit_sysfs(void)
1581 {
1582 kobject_put(&f2fs_feat);
1583 kset_unregister(&f2fs_kset);
1584 remove_proc_entry("fs/f2fs", NULL);
1585 f2fs_proc_root = NULL;
1586 }
1587
f2fs_register_sysfs(struct f2fs_sb_info * sbi)1588 int f2fs_register_sysfs(struct f2fs_sb_info *sbi)
1589 {
1590 struct super_block *sb = sbi->sb;
1591 int err;
1592
1593 sbi->s_kobj.kset = &f2fs_kset;
1594 init_completion(&sbi->s_kobj_unregister);
1595 err = kobject_init_and_add(&sbi->s_kobj, &f2fs_sb_ktype, NULL,
1596 "%s", sb->s_id);
1597 if (err)
1598 goto put_sb_kobj;
1599
1600 sbi->s_stat_kobj.kset = &f2fs_kset;
1601 init_completion(&sbi->s_stat_kobj_unregister);
1602 err = kobject_init_and_add(&sbi->s_stat_kobj, &f2fs_stat_ktype,
1603 &sbi->s_kobj, "stat");
1604 if (err)
1605 goto put_stat_kobj;
1606
1607 sbi->s_feature_list_kobj.kset = &f2fs_kset;
1608 init_completion(&sbi->s_feature_list_kobj_unregister);
1609 err = kobject_init_and_add(&sbi->s_feature_list_kobj,
1610 &f2fs_feature_list_ktype,
1611 &sbi->s_kobj, "feature_list");
1612 if (err)
1613 goto put_feature_list_kobj;
1614
1615 sbi->s_proc = proc_mkdir(sb->s_id, f2fs_proc_root);
1616 if (!sbi->s_proc) {
1617 err = -ENOMEM;
1618 goto put_feature_list_kobj;
1619 }
1620
1621 proc_create_single_data("segment_info", 0444, sbi->s_proc,
1622 segment_info_seq_show, sb);
1623 proc_create_single_data("segment_bits", 0444, sbi->s_proc,
1624 segment_bits_seq_show, sb);
1625 #ifdef CONFIG_F2FS_IOSTAT
1626 proc_create_single_data("iostat_info", 0444, sbi->s_proc,
1627 iostat_info_seq_show, sb);
1628 #endif
1629 proc_create_single_data("victim_bits", 0444, sbi->s_proc,
1630 victim_bits_seq_show, sb);
1631 proc_create_single_data("discard_plist_info", 0444, sbi->s_proc,
1632 discard_plist_seq_show, sb);
1633 proc_create_single_data("disk_map", 0444, sbi->s_proc,
1634 disk_map_seq_show, sb);
1635 return 0;
1636 put_feature_list_kobj:
1637 kobject_put(&sbi->s_feature_list_kobj);
1638 wait_for_completion(&sbi->s_feature_list_kobj_unregister);
1639 put_stat_kobj:
1640 kobject_put(&sbi->s_stat_kobj);
1641 wait_for_completion(&sbi->s_stat_kobj_unregister);
1642 put_sb_kobj:
1643 kobject_put(&sbi->s_kobj);
1644 wait_for_completion(&sbi->s_kobj_unregister);
1645 return err;
1646 }
1647
f2fs_unregister_sysfs(struct f2fs_sb_info * sbi)1648 void f2fs_unregister_sysfs(struct f2fs_sb_info *sbi)
1649 {
1650 remove_proc_subtree(sbi->sb->s_id, f2fs_proc_root);
1651
1652 kobject_put(&sbi->s_stat_kobj);
1653 wait_for_completion(&sbi->s_stat_kobj_unregister);
1654 kobject_put(&sbi->s_feature_list_kobj);
1655 wait_for_completion(&sbi->s_feature_list_kobj_unregister);
1656
1657 kobject_put(&sbi->s_kobj);
1658 wait_for_completion(&sbi->s_kobj_unregister);
1659 }
1660