fs/f2fs/sysfs.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 /*
   3  * f2fs sysfs interface
   4  *
   5  * Copyright (c) 2012 Samsung Electronics Co., Ltd.
   6  *             http://www.samsung.com/
   7  * Copyright (c) 2017 Chao Yu <[email protected]>
   8  */
   9 #include <linux/compiler.h>
  10 #include <linux/proc_fs.h>
  11 #include <linux/f2fs_fs.h>
  12 #include <linux/seq_file.h>
  13 #include <linux/unicode.h>
  14 #include <linux/ioprio.h>
  15 #include <linux/sysfs.h>
  16
  17 #include "f2fs.h"
  18 #include "segment.h"
  19 #include "gc.h"
  20 #include "iostat.h"
  21 #include <trace/events/f2fs.h>
  22
  23 static struct proc_dir_entry *f2fs_proc_root;
  24
  25 /* Sysfs support for f2fs */
  26 enum {
  27         GC_THREAD,      /* struct f2fs_gc_thread */
  28         SM_INFO,        /* struct f2fs_sm_info */
  29         DCC_INFO,       /* struct discard_cmd_control */
  30         NM_INFO,        /* struct f2fs_nm_info */
  31         F2FS_SBI,       /* struct f2fs_sb_info */
  32 #ifdef CONFIG_F2FS_STAT_FS
  33         STAT_INFO,      /* struct f2fs_stat_info */
  34 #endif
  35 #ifdef CONFIG_F2FS_FAULT_INJECTION
  36         FAULT_INFO_RATE,        /* struct f2fs_fault_info */
  37         FAULT_INFO_TYPE,        /* struct f2fs_fault_info */
  38 #endif
  39         RESERVED_BLOCKS,        /* struct f2fs_sb_info */
  40         CPRC_INFO,      /* struct ckpt_req_control */
  41         ATGC_INFO,      /* struct atgc_management */
  42 };
  43
  44 static const char *gc_mode_names[MAX_GC_MODE] = {
  45         "GC_NORMAL",
  46         "GC_IDLE_CB",
  47         "GC_IDLE_GREEDY",
  48         "GC_IDLE_AT",
  49         "GC_URGENT_HIGH",
  50         "GC_URGENT_LOW",
  51         "GC_URGENT_MID"
  52 };
  53
  54 struct f2fs_attr {
  55         struct attribute attr;
  56         ssize_t (*show)(struct f2fs_attr *a, struct f2fs_sb_info *sbi, char *buf);
  57         ssize_t (*store)(struct f2fs_attr *a, struct f2fs_sb_info *sbi,
  58                          const char *buf, size_t len);
  59         int struct_type;
  60         int offset;
  61         int id;
  62 };
  63
  64 static ssize_t f2fs_sbi_show(struct f2fs_attr *a,
  65                              struct f2fs_sb_info *sbi, char *buf);
  66
  67 static unsigned char *__struct_ptr(struct f2fs_sb_info *sbi, int struct_type)
  68 {
  69         if (struct_type == GC_THREAD)
  70                 return (unsigned char *)sbi->gc_thread;
  71         else if (struct_type == SM_INFO)
  72                 return (unsigned char *)SM_I(sbi);
  73         else if (struct_type == DCC_INFO)
  74                 return (unsigned char *)SM_I(sbi)->dcc_info;
  75         else if (struct_type == NM_INFO)
  76                 return (unsigned char *)NM_I(sbi);
  77         else if (struct_type == F2FS_SBI || struct_type == RESERVED_BLOCKS)
  78                 return (unsigned char *)sbi;
  79 #ifdef CONFIG_F2FS_FAULT_INJECTION
  80         else if (struct_type == FAULT_INFO_RATE ||
  81                                         struct_type == FAULT_INFO_TYPE)
  82                 return (unsigned char *)&F2FS_OPTION(sbi).fault_info;
  83 #endif
  84 #ifdef CONFIG_F2FS_STAT_FS
  85         else if (struct_type == STAT_INFO)
  86                 return (unsigned char *)F2FS_STAT(sbi);
  87 #endif
  88         else if (struct_type == CPRC_INFO)
  89                 return (unsigned char *)&sbi->cprc_info;
  90         else if (struct_type == ATGC_INFO)
  91                 return (unsigned char *)&sbi->am;
  92         return NULL;
  93 }
  94
  95 static ssize_t dirty_segments_show(struct f2fs_attr *a,
  96                 struct f2fs_sb_info *sbi, char *buf)
  97 {
  98         return sysfs_emit(buf, "%llu\n",
  99                         (unsigned long long)(dirty_segments(sbi)));
 100 }
 101
 102 static ssize_t free_segments_show(struct f2fs_attr *a,
 103                 struct f2fs_sb_info *sbi, char *buf)
 104 {
 105         return sysfs_emit(buf, "%llu\n",
 106                         (unsigned long long)(free_segments(sbi)));
 107 }
 108
 109 static ssize_t ovp_segments_show(struct f2fs_attr *a,
 110                 struct f2fs_sb_info *sbi, char *buf)
 111 {
 112         return sysfs_emit(buf, "%llu\n",
 113                         (unsigned long long)(overprovision_segments(sbi)));
 114 }
 115
 116 static ssize_t lifetime_write_kbytes_show(struct f2fs_attr *a,
 117                 struct f2fs_sb_info *sbi, char *buf)
 118 {
 119         return sysfs_emit(buf, "%llu\n",
 120                         (unsigned long long)(sbi->kbytes_written +
 121                         ((f2fs_get_sectors_written(sbi) -
 122                                 sbi->sectors_written_start) >> 1)));
 123 }
 124
 125 static ssize_t sb_status_show(struct f2fs_attr *a,
 126                 struct f2fs_sb_info *sbi, char *buf)
 127 {
 128         return sysfs_emit(buf, "%lx\n", sbi->s_flag);
 129 }
 130
 131 static ssize_t cp_status_show(struct f2fs_attr *a,
 132                 struct f2fs_sb_info *sbi, char *buf)
 133 {
 134         return sysfs_emit(buf, "%x\n", le32_to_cpu(F2FS_CKPT(sbi)->ckpt_flags));
 135 }
 136
 137 static ssize_t pending_discard_show(struct f2fs_attr *a,
 138                 struct f2fs_sb_info *sbi, char *buf)
 139 {
 140         if (!SM_I(sbi)->dcc_info)
 141                 return -EINVAL;
 142         return sysfs_emit(buf, "%llu\n", (unsigned long long)atomic_read(
 143                                 &SM_I(sbi)->dcc_info->discard_cmd_cnt));
 144 }
 145
 146 static ssize_t issued_discard_show(struct f2fs_attr *a,
 147                 struct f2fs_sb_info *sbi, char *buf)
 148 {
 149         if (!SM_I(sbi)->dcc_info)
 150                 return -EINVAL;
 151         return sysfs_emit(buf, "%llu\n", (unsigned long long)atomic_read(
 152                                 &SM_I(sbi)->dcc_info->issued_discard));
 153 }
 154
 155 static ssize_t queued_discard_show(struct f2fs_attr *a,
 156                 struct f2fs_sb_info *sbi, char *buf)
 157 {
 158         if (!SM_I(sbi)->dcc_info)
 159                 return -EINVAL;
 160         return sysfs_emit(buf, "%llu\n", (unsigned long long)atomic_read(
 161                                 &SM_I(sbi)->dcc_info->queued_discard));
 162 }
 163
 164 static ssize_t undiscard_blks_show(struct f2fs_attr *a,
 165                 struct f2fs_sb_info *sbi, char *buf)
 166 {
 167         if (!SM_I(sbi)->dcc_info)
 168                 return -EINVAL;
 169         return sysfs_emit(buf, "%u\n",
 170                                 SM_I(sbi)->dcc_info->undiscard_blks);
 171 }
 172
 173 static ssize_t gc_mode_show(struct f2fs_attr *a,
 174                 struct f2fs_sb_info *sbi, char *buf)
 175 {
 176         return sysfs_emit(buf, "%s\n", gc_mode_names[sbi->gc_mode]);
 177 }
 178
 179 static ssize_t features_show(struct f2fs_attr *a,
 180                 struct f2fs_sb_info *sbi, char *buf)
 181 {
 182         int len = 0;
 183
 184         if (f2fs_sb_has_encrypt(sbi))
 185                 len += scnprintf(buf, PAGE_SIZE - len, "%s",
 186                                                 "encryption");
 187         if (f2fs_sb_has_blkzoned(sbi))
 188                 len += scnprintf(buf + len, PAGE_SIZE - len, "%s%s",
 189                                 len ? ", " : "", "blkzoned");
 190         if (f2fs_sb_has_extra_attr(sbi))
 191                 len += scnprintf(buf + len, PAGE_SIZE - len, "%s%s",
 192                                 len ? ", " : "", "extra_attr");
 193         if (f2fs_sb_has_project_quota(sbi))
 194                 len += scnprintf(buf + len, PAGE_SIZE - len, "%s%s",
 195                                 len ? ", " : "", "projquota");
 196         if (f2fs_sb_has_inode_chksum(sbi))
 197                 len += scnprintf(buf + len, PAGE_SIZE - len, "%s%s",
 198                                 len ? ", " : "", "inode_checksum");
 199         if (f2fs_sb_has_flexible_inline_xattr(sbi))
 200                 len += scnprintf(buf + len, PAGE_SIZE - len, "%s%s",
 201                                 len ? ", " : "", "flexible_inline_xattr");
 202         if (f2fs_sb_has_quota_ino(sbi))
 203                 len += scnprintf(buf + len, PAGE_SIZE - len, "%s%s",
 204                                 len ? ", " : "", "quota_ino");
 205         if (f2fs_sb_has_inode_crtime(sbi))
 206                 len += scnprintf(buf + len, PAGE_SIZE - len, "%s%s",
 207                                 len ? ", " : "", "inode_crtime");
 208         if (f2fs_sb_has_lost_found(sbi))
 209                 len += scnprintf(buf + len, PAGE_SIZE - len, "%s%s",
 210                                 len ? ", " : "", "lost_found");
 211         if (f2fs_sb_has_verity(sbi))
 212                 len += scnprintf(buf + len, PAGE_SIZE - len, "%s%s",
 213                                 len ? ", " : "", "verity");
 214         if (f2fs_sb_has_sb_chksum(sbi))
 215                 len += scnprintf(buf + len, PAGE_SIZE - len, "%s%s",
 216                                 len ? ", " : "", "sb_checksum");
 217         if (f2fs_sb_has_casefold(sbi))
 218                 len += scnprintf(buf + len, PAGE_SIZE - len, "%s%s",
 219                                 len ? ", " : "", "casefold");
 220         if (f2fs_sb_has_readonly(sbi))
 221                 len += scnprintf(buf + len, PAGE_SIZE - len, "%s%s",
 222                                 len ? ", " : "", "readonly");
 223         if (f2fs_sb_has_compression(sbi))
 224                 len += scnprintf(buf + len, PAGE_SIZE - len, "%s%s",
 225                                 len ? ", " : "", "compression");
 226         len += scnprintf(buf + len, PAGE_SIZE - len, "%s%s",
 227                                 len ? ", " : "", "pin_file");
 228         len += scnprintf(buf + len, PAGE_SIZE - len, "\n");
 229         return len;
 230 }
 231
 232 static ssize_t current_reserved_blocks_show(struct f2fs_attr *a,
 233                                         struct f2fs_sb_info *sbi, char *buf)
 234 {
 235         return sysfs_emit(buf, "%u\n", sbi->current_reserved_blocks);
 236 }
 237
 238 static ssize_t unusable_show(struct f2fs_attr *a,
 239                 struct f2fs_sb_info *sbi, char *buf)
 240 {
 241         block_t unusable;
 242
 243         if (test_opt(sbi, DISABLE_CHECKPOINT))
 244                 unusable = sbi->unusable_block_count;
 245         else
 246                 unusable = f2fs_get_unusable_blocks(sbi);
 247         return sysfs_emit(buf, "%llu\n", (unsigned long long)unusable);
 248 }
 249
 250 static ssize_t encoding_show(struct f2fs_attr *a,
 251                 struct f2fs_sb_info *sbi, char *buf)
 252 {
 253 #if IS_ENABLED(CONFIG_UNICODE)
 254         struct super_block *sb = sbi->sb;
 255
 256         if (f2fs_sb_has_casefold(sbi))
 257                 return sysfs_emit(buf, "UTF-8 (%d.%d.%d)\n",
 258                         (sb->s_encoding->version >> 16) & 0xff,
 259                         (sb->s_encoding->version >> 8) & 0xff,
 260                         sb->s_encoding->version & 0xff);
 261 #endif
 262         return sysfs_emit(buf, "(none)\n");
 263 }
 264
 265 static ssize_t mounted_time_sec_show(struct f2fs_attr *a,
 266                 struct f2fs_sb_info *sbi, char *buf)
 267 {
 268         return sysfs_emit(buf, "%llu\n", SIT_I(sbi)->mounted_time);
 269 }
 270
 271 #ifdef CONFIG_F2FS_STAT_FS
 272 static ssize_t moved_blocks_foreground_show(struct f2fs_attr *a,
 273                                 struct f2fs_sb_info *sbi, char *buf)
 274 {
 275         struct f2fs_stat_info *si = F2FS_STAT(sbi);
 276
 277         return sysfs_emit(buf, "%llu\n",
 278                 (unsigned long long)(si->tot_blks -
 279                         (si->bg_data_blks + si->bg_node_blks)));
 280 }
 281
 282 static ssize_t moved_blocks_background_show(struct f2fs_attr *a,
 283                                 struct f2fs_sb_info *sbi, char *buf)
 284 {
 285         struct f2fs_stat_info *si = F2FS_STAT(sbi);
 286
 287         return sysfs_emit(buf, "%llu\n",
 288                 (unsigned long long)(si->bg_data_blks + si->bg_node_blks));
 289 }
 290
 291 static ssize_t avg_vblocks_show(struct f2fs_attr *a,
 292                 struct f2fs_sb_info *sbi, char *buf)
 293 {
 294         struct f2fs_stat_info *si = F2FS_STAT(sbi);
 295
 296         si->dirty_count = dirty_segments(sbi);
 297         f2fs_update_sit_info(sbi);
 298         return sysfs_emit(buf, "%llu\n", (unsigned long long)(si->avg_vblocks));
 299 }
 300 #endif
 301
 302 static ssize_t main_blkaddr_show(struct f2fs_attr *a,
 303                                 struct f2fs_sb_info *sbi, char *buf)
 304 {
 305         return sysfs_emit(buf, "%llu\n",
 306                         (unsigned long long)MAIN_BLKADDR(sbi));
 307 }
 308
 309 static ssize_t f2fs_sbi_show(struct f2fs_attr *a,
 310                         struct f2fs_sb_info *sbi, char *buf)
 311 {
 312         unsigned char *ptr = NULL;
 313         unsigned int *ui;
 314
 315         ptr = __struct_ptr(sbi, a->struct_type);
 316         if (!ptr)
 317                 return -EINVAL;
 318
 319         if (!strcmp(a->attr.name, "extension_list")) {
 320                 __u8 (*extlist)[F2FS_EXTENSION_LEN] =
 321                                         sbi->raw_super->extension_list;
 322                 int cold_count = le32_to_cpu(sbi->raw_super->extension_count);
 323                 int hot_count = sbi->raw_super->hot_ext_count;
 324                 int len = 0, i;
 325
 326                 len += scnprintf(buf + len, PAGE_SIZE - len,
 327                                                 "cold file extension:\n");
 328                 for (i = 0; i < cold_count; i++)
 329                         len += scnprintf(buf + len, PAGE_SIZE - len, "%s\n",
 330                                                                 extlist[i]);
 331
 332                 len += scnprintf(buf + len, PAGE_SIZE - len,
 333                                                 "hot file extension:\n");
 334                 for (i = cold_count; i < cold_count + hot_count; i++)
 335                         len += scnprintf(buf + len, PAGE_SIZE - len, "%s\n",
 336                                                                 extlist[i]);
 337                 return len;
 338         }
 339
 340         if (!strcmp(a->attr.name, "ckpt_thread_ioprio")) {
 341                 struct ckpt_req_control *cprc = &sbi->cprc_info;
 342                 int class = IOPRIO_PRIO_CLASS(cprc->ckpt_thread_ioprio);
 343                 int 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
 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
 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
 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
 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
 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  */
 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
 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
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
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
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
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
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
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
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
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
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
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
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
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
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 }