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 <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
  16 #include "f2fs.h"
  17 #include "segment.h"
  18 #include "gc.h"
  19 #include <trace/events/f2fs.h>
  20
  21 static struct proc_dir_entry *f2fs_proc_root;
  22
  23 /* Sysfs support for f2fs */
  24 enum {
  25         GC_THREAD,      /* struct f2fs_gc_thread */
  26         SM_INFO,        /* struct f2fs_sm_info */
  27         DCC_INFO,       /* struct discard_cmd_control */
  28         NM_INFO,        /* struct f2fs_nm_info */
  29         F2FS_SBI,       /* struct f2fs_sb_info */
  30 #ifdef CONFIG_F2FS_STAT_FS
  31         STAT_INFO,      /* struct f2fs_stat_info */
  32 #endif
  33 #ifdef CONFIG_F2FS_FAULT_INJECTION
  34         FAULT_INFO_RATE,        /* struct f2fs_fault_info */
  35         FAULT_INFO_TYPE,        /* struct f2fs_fault_info */
  36 #endif
  37         RESERVED_BLOCKS,        /* struct f2fs_sb_info */
  38         CPRC_INFO,      /* struct ckpt_req_control */
  39 };
  40
  41 struct f2fs_attr {
  42         struct attribute attr;
  43         ssize_t (*show)(struct f2fs_attr *, struct f2fs_sb_info *, char *);
  44         ssize_t (*store)(struct f2fs_attr *, struct f2fs_sb_info *,
  45                          const char *, size_t);
  46         int struct_type;
  47         int offset;
  48         int id;
  49 };
  50
  51 static ssize_t f2fs_sbi_show(struct f2fs_attr *a,
  52                              struct f2fs_sb_info *sbi, char *buf);
  53
  54 static unsigned char *__struct_ptr(struct f2fs_sb_info *sbi, int struct_type)
  55 {
  56         if (struct_type == GC_THREAD)
  57                 return (unsigned char *)sbi->gc_thread;
  58         else if (struct_type == SM_INFO)
  59                 return (unsigned char *)SM_I(sbi);
  60         else if (struct_type == DCC_INFO)
  61                 return (unsigned char *)SM_I(sbi)->dcc_info;
  62         else if (struct_type == NM_INFO)
  63                 return (unsigned char *)NM_I(sbi);
  64         else if (struct_type == F2FS_SBI || struct_type == RESERVED_BLOCKS)
  65                 return (unsigned char *)sbi;
  66 #ifdef CONFIG_F2FS_FAULT_INJECTION
  67         else if (struct_type == FAULT_INFO_RATE ||
  68                                         struct_type == FAULT_INFO_TYPE)
  69                 return (unsigned char *)&F2FS_OPTION(sbi).fault_info;
  70 #endif
  71 #ifdef CONFIG_F2FS_STAT_FS
  72         else if (struct_type == STAT_INFO)
  73                 return (unsigned char *)F2FS_STAT(sbi);
  74 #endif
  75         else if (struct_type == CPRC_INFO)
  76                 return (unsigned char *)&sbi->cprc_info;
  77         return NULL;
  78 }
  79
  80 static ssize_t dirty_segments_show(struct f2fs_attr *a,
  81                 struct f2fs_sb_info *sbi, char *buf)
  82 {
  83         return sprintf(buf, "%llu\n",
  84                         (unsigned long long)(dirty_segments(sbi)));
  85 }
  86
  87 static ssize_t free_segments_show(struct f2fs_attr *a,
  88                 struct f2fs_sb_info *sbi, char *buf)
  89 {
  90         return sprintf(buf, "%llu\n",
  91                         (unsigned long long)(free_segments(sbi)));
  92 }
  93
  94 static ssize_t lifetime_write_kbytes_show(struct f2fs_attr *a,
  95                 struct f2fs_sb_info *sbi, char *buf)
  96 {
  97         return sprintf(buf, "%llu\n",
  98                         (unsigned long long)(sbi->kbytes_written +
  99                         ((f2fs_get_sectors_written(sbi) -
 100                                 sbi->sectors_written_start) >> 1)));
 101 }
 102
 103 static ssize_t sb_status_show(struct f2fs_attr *a,
 104                 struct f2fs_sb_info *sbi, char *buf)
 105 {
 106         return sprintf(buf, "%lx\n", sbi->s_flag);
 107 }
 108
 109 static ssize_t features_show(struct f2fs_attr *a,
 110                 struct f2fs_sb_info *sbi, char *buf)
 111 {
 112         int len = 0;
 113
 114         if (f2fs_sb_has_encrypt(sbi))
 115                 len += scnprintf(buf, PAGE_SIZE - len, "%s",
 116                                                 "encryption");
 117         if (f2fs_sb_has_blkzoned(sbi))
 118                 len += scnprintf(buf + len, PAGE_SIZE - len, "%s%s",
 119                                 len ? ", " : "", "blkzoned");
 120         if (f2fs_sb_has_extra_attr(sbi))
 121                 len += scnprintf(buf + len, PAGE_SIZE - len, "%s%s",
 122                                 len ? ", " : "", "extra_attr");
 123         if (f2fs_sb_has_project_quota(sbi))
 124                 len += scnprintf(buf + len, PAGE_SIZE - len, "%s%s",
 125                                 len ? ", " : "", "projquota");
 126         if (f2fs_sb_has_inode_chksum(sbi))
 127                 len += scnprintf(buf + len, PAGE_SIZE - len, "%s%s",
 128                                 len ? ", " : "", "inode_checksum");
 129         if (f2fs_sb_has_flexible_inline_xattr(sbi))
 130                 len += scnprintf(buf + len, PAGE_SIZE - len, "%s%s",
 131                                 len ? ", " : "", "flexible_inline_xattr");
 132         if (f2fs_sb_has_quota_ino(sbi))
 133                 len += scnprintf(buf + len, PAGE_SIZE - len, "%s%s",
 134                                 len ? ", " : "", "quota_ino");
 135         if (f2fs_sb_has_inode_crtime(sbi))
 136                 len += scnprintf(buf + len, PAGE_SIZE - len, "%s%s",
 137                                 len ? ", " : "", "inode_crtime");
 138         if (f2fs_sb_has_lost_found(sbi))
 139                 len += scnprintf(buf + len, PAGE_SIZE - len, "%s%s",
 140                                 len ? ", " : "", "lost_found");
 141         if (f2fs_sb_has_verity(sbi))
 142                 len += scnprintf(buf + len, PAGE_SIZE - len, "%s%s",
 143                                 len ? ", " : "", "verity");
 144         if (f2fs_sb_has_sb_chksum(sbi))
 145                 len += scnprintf(buf + len, PAGE_SIZE - len, "%s%s",
 146                                 len ? ", " : "", "sb_checksum");
 147         if (f2fs_sb_has_casefold(sbi))
 148                 len += scnprintf(buf + len, PAGE_SIZE - len, "%s%s",
 149                                 len ? ", " : "", "casefold");
 150         if (f2fs_sb_has_compression(sbi))
 151                 len += scnprintf(buf + len, PAGE_SIZE - len, "%s%s",
 152                                 len ? ", " : "", "compression");
 153         len += scnprintf(buf + len, PAGE_SIZE - len, "%s%s",
 154                                 len ? ", " : "", "pin_file");
 155         len += scnprintf(buf + len, PAGE_SIZE - len, "\n");
 156         return len;
 157 }
 158
 159 static ssize_t current_reserved_blocks_show(struct f2fs_attr *a,
 160                                         struct f2fs_sb_info *sbi, char *buf)
 161 {
 162         return sprintf(buf, "%u\n", sbi->current_reserved_blocks);
 163 }
 164
 165 static ssize_t unusable_show(struct f2fs_attr *a,
 166                 struct f2fs_sb_info *sbi, char *buf)
 167 {
 168         block_t unusable;
 169
 170         if (test_opt(sbi, DISABLE_CHECKPOINT))
 171                 unusable = sbi->unusable_block_count;
 172         else
 173                 unusable = f2fs_get_unusable_blocks(sbi);
 174         return sprintf(buf, "%llu\n", (unsigned long long)unusable);
 175 }
 176
 177 static ssize_t encoding_show(struct f2fs_attr *a,
 178                 struct f2fs_sb_info *sbi, char *buf)
 179 {
 180 #ifdef CONFIG_UNICODE
 181         struct super_block *sb = sbi->sb;
 182
 183         if (f2fs_sb_has_casefold(sbi))
 184                 return snprintf(buf, PAGE_SIZE, "%s (%d.%d.%d)\n",
 185                         sb->s_encoding->charset,
 186                         (sb->s_encoding->version >> 16) & 0xff,
 187                         (sb->s_encoding->version >> 8) & 0xff,
 188                         sb->s_encoding->version & 0xff);
 189 #endif
 190         return sprintf(buf, "(none)");
 191 }
 192
 193 static ssize_t mounted_time_sec_show(struct f2fs_attr *a,
 194                 struct f2fs_sb_info *sbi, char *buf)
 195 {
 196         return sprintf(buf, "%llu", SIT_I(sbi)->mounted_time);
 197 }
 198
 199 #ifdef CONFIG_F2FS_STAT_FS
 200 static ssize_t moved_blocks_foreground_show(struct f2fs_attr *a,
 201                                 struct f2fs_sb_info *sbi, char *buf)
 202 {
 203         struct f2fs_stat_info *si = F2FS_STAT(sbi);
 204
 205         return sprintf(buf, "%llu\n",
 206                 (unsigned long long)(si->tot_blks -
 207                         (si->bg_data_blks + si->bg_node_blks)));
 208 }
 209
 210 static ssize_t moved_blocks_background_show(struct f2fs_attr *a,
 211                                 struct f2fs_sb_info *sbi, char *buf)
 212 {
 213         struct f2fs_stat_info *si = F2FS_STAT(sbi);
 214
 215         return sprintf(buf, "%llu\n",
 216                 (unsigned long long)(si->bg_data_blks + si->bg_node_blks));
 217 }
 218
 219 static ssize_t avg_vblocks_show(struct f2fs_attr *a,
 220                 struct f2fs_sb_info *sbi, char *buf)
 221 {
 222         struct f2fs_stat_info *si = F2FS_STAT(sbi);
 223
 224         si->dirty_count = dirty_segments(sbi);
 225         f2fs_update_sit_info(sbi);
 226         return sprintf(buf, "%llu\n", (unsigned long long)(si->avg_vblocks));
 227 }
 228 #endif
 229
 230 static ssize_t main_blkaddr_show(struct f2fs_attr *a,
 231                                 struct f2fs_sb_info *sbi, char *buf)
 232 {
 233         return snprintf(buf, PAGE_SIZE, "%llu\n",
 234                         (unsigned long long)MAIN_BLKADDR(sbi));
 235 }
 236
 237 static ssize_t f2fs_sbi_show(struct f2fs_attr *a,
 238                         struct f2fs_sb_info *sbi, char *buf)
 239 {
 240         unsigned char *ptr = NULL;
 241         unsigned int *ui;
 242
 243         ptr = __struct_ptr(sbi, a->struct_type);
 244         if (!ptr)
 245                 return -EINVAL;
 246
 247         if (!strcmp(a->attr.name, "extension_list")) {
 248                 __u8 (*extlist)[F2FS_EXTENSION_LEN] =
 249                                         sbi->raw_super->extension_list;
 250                 int cold_count = le32_to_cpu(sbi->raw_super->extension_count);
 251                 int hot_count = sbi->raw_super->hot_ext_count;
 252                 int len = 0, i;
 253
 254                 len += scnprintf(buf + len, PAGE_SIZE - len,
 255                                                 "cold file extension:\n");
 256                 for (i = 0; i < cold_count; i++)
 257                         len += scnprintf(buf + len, PAGE_SIZE - len, "%s\n",
 258                                                                 extlist[i]);
 259
 260                 len += scnprintf(buf + len, PAGE_SIZE - len,
 261                                                 "hot file extension:\n");
 262                 for (i = cold_count; i < cold_count + hot_count; i++)
 263                         len += scnprintf(buf + len, PAGE_SIZE - len, "%s\n",
 264                                                                 extlist[i]);
 265                 return len;
 266         }
 267
 268         if (!strcmp(a->attr.name, "ckpt_thread_ioprio")) {
 269                 struct ckpt_req_control *cprc = &sbi->cprc_info;
 270                 int len = 0;
 271                 int class = IOPRIO_PRIO_CLASS(cprc->ckpt_thread_ioprio);
 272                 int data = IOPRIO_PRIO_DATA(cprc->ckpt_thread_ioprio);
 273
 274                 if (class == IOPRIO_CLASS_RT)
 275                         len += scnprintf(buf + len, PAGE_SIZE - len, "rt,");
 276                 else if (class == IOPRIO_CLASS_BE)
 277                         len += scnprintf(buf + len, PAGE_SIZE - len, "be,");
 278                 else
 279                         return -EINVAL;
 280
 281                 len += scnprintf(buf + len, PAGE_SIZE - len, "%d\n", data);
 282                 return len;
 283         }
 284
 285         ui = (unsigned int *)(ptr + a->offset);
 286
 287         return sprintf(buf, "%u\n", *ui);
 288 }
 289
 290 static ssize_t __sbi_store(struct f2fs_attr *a,
 291                         struct f2fs_sb_info *sbi,
 292                         const char *buf, size_t count)
 293 {
 294         unsigned char *ptr;
 295         unsigned long t;
 296         unsigned int *ui;
 297         ssize_t ret;
 298
 299         ptr = __struct_ptr(sbi, a->struct_type);
 300         if (!ptr)
 301                 return -EINVAL;
 302
 303         if (!strcmp(a->attr.name, "extension_list")) {
 304                 const char *name = strim((char *)buf);
 305                 bool set = true, hot;
 306
 307                 if (!strncmp(name, "[h]", 3))
 308                         hot = true;
 309                 else if (!strncmp(name, "[c]", 3))
 310                         hot = false;
 311                 else
 312                         return -EINVAL;
 313
 314                 name += 3;
 315
 316                 if (*name == '!') {
 317                         name++;
 318                         set = false;
 319                 }
 320
 321                 if (strlen(name) >= F2FS_EXTENSION_LEN)
 322                         return -EINVAL;
 323
 324                 down_write(&sbi->sb_lock);
 325
 326                 ret = f2fs_update_extension_list(sbi, name, hot, set);
 327                 if (ret)
 328                         goto out;
 329
 330                 ret = f2fs_commit_super(sbi, false);
 331                 if (ret)
 332                         f2fs_update_extension_list(sbi, name, hot, !set);
 333 out:
 334                 up_write(&sbi->sb_lock);
 335                 return ret ? ret : count;
 336         }
 337
 338         if (!strcmp(a->attr.name, "ckpt_thread_ioprio")) {
 339                 const char *name = strim((char *)buf);
 340                 struct ckpt_req_control *cprc = &sbi->cprc_info;
 341                 int class;
 342                 long data;
 343                 int ret;
 344
 345                 if (!strncmp(name, "rt,", 3))
 346                         class = IOPRIO_CLASS_RT;
 347                 else if (!strncmp(name, "be,", 3))
 348                         class = IOPRIO_CLASS_BE;
 349                 else
 350                         return -EINVAL;
 351
 352                 name += 3;
 353                 ret = kstrtol(name, 10, &data);
 354                 if (ret)
 355                         return ret;
 356                 if (data >= IOPRIO_BE_NR || data < 0)
 357                         return -EINVAL;
 358
 359                 cprc->ckpt_thread_ioprio = IOPRIO_PRIO_VALUE(class, data);
 360                 if (test_opt(sbi, MERGE_CHECKPOINT)) {
 361                         ret = set_task_ioprio(cprc->f2fs_issue_ckpt,
 362                                         cprc->ckpt_thread_ioprio);
 363                         if (ret)
 364                                 return ret;
 365                 }
 366
 367                 return count;
 368         }
 369
 370         ui = (unsigned int *)(ptr + a->offset);
 371
 372         ret = kstrtoul(skip_spaces(buf), 0, &t);
 373         if (ret < 0)
 374                 return ret;
 375 #ifdef CONFIG_F2FS_FAULT_INJECTION
 376         if (a->struct_type == FAULT_INFO_TYPE && t >= (1 << FAULT_MAX))
 377                 return -EINVAL;
 378         if (a->struct_type == FAULT_INFO_RATE && t >= UINT_MAX)
 379                 return -EINVAL;
 380 #endif
 381         if (a->struct_type == RESERVED_BLOCKS) {
 382                 spin_lock(&sbi->stat_lock);
 383                 if (t > (unsigned long)(sbi->user_block_count -
 384                                 F2FS_OPTION(sbi).root_reserved_blocks)) {
 385                         spin_unlock(&sbi->stat_lock);
 386                         return -EINVAL;
 387                 }
 388                 *ui = t;
 389                 sbi->current_reserved_blocks = min(sbi->reserved_blocks,
 390                                 sbi->user_block_count - valid_user_blocks(sbi));
 391                 spin_unlock(&sbi->stat_lock);
 392                 return count;
 393         }
 394
 395         if (!strcmp(a->attr.name, "discard_granularity")) {
 396                 if (t == 0 || t > MAX_PLIST_NUM)
 397                         return -EINVAL;
 398                 if (t == *ui)
 399                         return count;
 400                 *ui = t;
 401                 return count;
 402         }
 403
 404         if (!strcmp(a->attr.name, "migration_granularity")) {
 405                 if (t == 0 || t > sbi->segs_per_sec)
 406                         return -EINVAL;
 407         }
 408
 409         if (!strcmp(a->attr.name, "trim_sections"))
 410                 return -EINVAL;
 411
 412         if (!strcmp(a->attr.name, "gc_urgent")) {
 413                 if (t == 0) {
 414                         sbi->gc_mode = GC_NORMAL;
 415                 } else if (t == 1) {
 416                         sbi->gc_mode = GC_URGENT_HIGH;
 417                         if (sbi->gc_thread) {
 418                                 sbi->gc_thread->gc_wake = 1;
 419                                 wake_up_interruptible_all(
 420                                         &sbi->gc_thread->gc_wait_queue_head);
 421                                 wake_up_discard_thread(sbi, true);
 422                         }
 423                 } else if (t == 2) {
 424                         sbi->gc_mode = GC_URGENT_LOW;
 425                 } else {
 426                         return -EINVAL;
 427                 }
 428                 return count;
 429         }
 430         if (!strcmp(a->attr.name, "gc_idle")) {
 431                 if (t == GC_IDLE_CB) {
 432                         sbi->gc_mode = GC_IDLE_CB;
 433                 } else if (t == GC_IDLE_GREEDY) {
 434                         sbi->gc_mode = GC_IDLE_GREEDY;
 435                 } else if (t == GC_IDLE_AT) {
 436                         if (!sbi->am.atgc_enabled)
 437                                 return -EINVAL;
 438                         sbi->gc_mode = GC_AT;
 439                 } else {
 440                         sbi->gc_mode = GC_NORMAL;
 441                 }
 442                 return count;
 443         }
 444
 445         if (!strcmp(a->attr.name, "iostat_enable")) {
 446                 sbi->iostat_enable = !!t;
 447                 if (!sbi->iostat_enable)
 448                         f2fs_reset_iostat(sbi);
 449                 return count;
 450         }
 451
 452         if (!strcmp(a->attr.name, "iostat_period_ms")) {
 453                 if (t < MIN_IOSTAT_PERIOD_MS || t > MAX_IOSTAT_PERIOD_MS)
 454                         return -EINVAL;
 455                 spin_lock(&sbi->iostat_lock);
 456                 sbi->iostat_period_ms = (unsigned int)t;
 457                 spin_unlock(&sbi->iostat_lock);
 458                 return count;
 459         }
 460
 461         *ui = (unsigned int)t;
 462
 463         return count;
 464 }
 465
 466 static ssize_t f2fs_sbi_store(struct f2fs_attr *a,
 467                         struct f2fs_sb_info *sbi,
 468                         const char *buf, size_t count)
 469 {
 470         ssize_t ret;
 471         bool gc_entry = (!strcmp(a->attr.name, "gc_urgent") ||
 472                                         a->struct_type == GC_THREAD);
 473
 474         if (gc_entry) {
 475                 if (!down_read_trylock(&sbi->sb->s_umount))
 476                         return -EAGAIN;
 477         }
 478         ret = __sbi_store(a, sbi, buf, count);
 479         if (gc_entry)
 480                 up_read(&sbi->sb->s_umount);
 481
 482         return ret;
 483 }
 484
 485 static ssize_t f2fs_attr_show(struct kobject *kobj,
 486                                 struct attribute *attr, char *buf)
 487 {
 488         struct f2fs_sb_info *sbi = container_of(kobj, struct f2fs_sb_info,
 489                                                                 s_kobj);
 490         struct f2fs_attr *a = container_of(attr, struct f2fs_attr, attr);
 491
 492         return a->show ? a->show(a, sbi, buf) : 0;
 493 }
 494
 495 static ssize_t f2fs_attr_store(struct kobject *kobj, struct attribute *attr,
 496                                                 const char *buf, size_t len)
 497 {
 498         struct f2fs_sb_info *sbi = container_of(kobj, struct f2fs_sb_info,
 499                                                                         s_kobj);
 500         struct f2fs_attr *a = container_of(attr, struct f2fs_attr, attr);
 501
 502         return a->store ? a->store(a, sbi, buf, len) : 0;
 503 }
 504
 505 static void f2fs_sb_release(struct kobject *kobj)
 506 {
 507         struct f2fs_sb_info *sbi = container_of(kobj, struct f2fs_sb_info,
 508                                                                 s_kobj);
 509         complete(&sbi->s_kobj_unregister);
 510 }
 511
 512 enum feat_id {
 513         FEAT_CRYPTO = 0,
 514         FEAT_BLKZONED,
 515         FEAT_ATOMIC_WRITE,
 516         FEAT_EXTRA_ATTR,
 517         FEAT_PROJECT_QUOTA,
 518         FEAT_INODE_CHECKSUM,
 519         FEAT_FLEXIBLE_INLINE_XATTR,
 520         FEAT_QUOTA_INO,
 521         FEAT_INODE_CRTIME,
 522         FEAT_LOST_FOUND,
 523         FEAT_VERITY,
 524         FEAT_SB_CHECKSUM,
 525         FEAT_CASEFOLD,
 526         FEAT_COMPRESSION,
 527         FEAT_TEST_DUMMY_ENCRYPTION_V2,
 528 };
 529
 530 static ssize_t f2fs_feature_show(struct f2fs_attr *a,
 531                 struct f2fs_sb_info *sbi, char *buf)
 532 {
 533         switch (a->id) {
 534         case FEAT_CRYPTO:
 535         case FEAT_BLKZONED:
 536         case FEAT_ATOMIC_WRITE:
 537         case FEAT_EXTRA_ATTR:
 538         case FEAT_PROJECT_QUOTA:
 539         case FEAT_INODE_CHECKSUM:
 540         case FEAT_FLEXIBLE_INLINE_XATTR:
 541         case FEAT_QUOTA_INO:
 542         case FEAT_INODE_CRTIME:
 543         case FEAT_LOST_FOUND:
 544         case FEAT_VERITY:
 545         case FEAT_SB_CHECKSUM:
 546         case FEAT_CASEFOLD:
 547         case FEAT_COMPRESSION:
 548         case FEAT_TEST_DUMMY_ENCRYPTION_V2:
 549                 return sprintf(buf, "supported\n");
 550         }
 551         return 0;
 552 }
 553
 554 #define F2FS_ATTR_OFFSET(_struct_type, _name, _mode, _show, _store, _offset) \
 555 static struct f2fs_attr f2fs_attr_##_name = {                   \
 556         .attr = {.name = __stringify(_name), .mode = _mode },   \
 557         .show   = _show,                                        \
 558         .store  = _store,                                       \
 559         .struct_type = _struct_type,                            \
 560         .offset = _offset                                       \
 561 }
 562
 563 #define F2FS_RW_ATTR(struct_type, struct_name, name, elname)    \
 564         F2FS_ATTR_OFFSET(struct_type, name, 0644,               \
 565                 f2fs_sbi_show, f2fs_sbi_store,                  \
 566                 offsetof(struct struct_name, elname))
 567
 568 #define F2FS_GENERAL_RO_ATTR(name) \
 569 static struct f2fs_attr f2fs_attr_##name = __ATTR(name, 0444, name##_show, NULL)
 570
 571 #define F2FS_FEATURE_RO_ATTR(_name, _id)                        \
 572 static struct f2fs_attr f2fs_attr_##_name = {                   \
 573         .attr = {.name = __stringify(_name), .mode = 0444 },    \
 574         .show   = f2fs_feature_show,                            \
 575         .id     = _id,                                          \
 576 }
 577
 578 #define F2FS_STAT_ATTR(_struct_type, _struct_name, _name, _elname)      \
 579 static struct f2fs_attr f2fs_attr_##_name = {                   \
 580         .attr = {.name = __stringify(_name), .mode = 0444 },    \
 581         .show = f2fs_sbi_show,                                  \
 582         .struct_type = _struct_type,                            \
 583         .offset = offsetof(struct _struct_name, _elname),       \
 584 }
 585
 586 F2FS_RW_ATTR(GC_THREAD, f2fs_gc_kthread, gc_urgent_sleep_time,
 587                                                         urgent_sleep_time);
 588 F2FS_RW_ATTR(GC_THREAD, f2fs_gc_kthread, gc_min_sleep_time, min_sleep_time);
 589 F2FS_RW_ATTR(GC_THREAD, f2fs_gc_kthread, gc_max_sleep_time, max_sleep_time);
 590 F2FS_RW_ATTR(GC_THREAD, f2fs_gc_kthread, gc_no_gc_sleep_time, no_gc_sleep_time);
 591 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, gc_idle, gc_mode);
 592 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, gc_urgent, gc_mode);
 593 F2FS_RW_ATTR(SM_INFO, f2fs_sm_info, reclaim_segments, rec_prefree_segments);
 594 F2FS_RW_ATTR(DCC_INFO, discard_cmd_control, max_small_discards, max_discards);
 595 F2FS_RW_ATTR(DCC_INFO, discard_cmd_control, discard_granularity, discard_granularity);
 596 F2FS_RW_ATTR(RESERVED_BLOCKS, f2fs_sb_info, reserved_blocks, reserved_blocks);
 597 F2FS_RW_ATTR(SM_INFO, f2fs_sm_info, batched_trim_sections, trim_sections);
 598 F2FS_RW_ATTR(SM_INFO, f2fs_sm_info, ipu_policy, ipu_policy);
 599 F2FS_RW_ATTR(SM_INFO, f2fs_sm_info, min_ipu_util, min_ipu_util);
 600 F2FS_RW_ATTR(SM_INFO, f2fs_sm_info, min_fsync_blocks, min_fsync_blocks);
 601 F2FS_RW_ATTR(SM_INFO, f2fs_sm_info, min_seq_blocks, min_seq_blocks);
 602 F2FS_RW_ATTR(SM_INFO, f2fs_sm_info, min_hot_blocks, min_hot_blocks);
 603 F2FS_RW_ATTR(SM_INFO, f2fs_sm_info, min_ssr_sections, min_ssr_sections);
 604 F2FS_RW_ATTR(NM_INFO, f2fs_nm_info, ram_thresh, ram_thresh);
 605 F2FS_RW_ATTR(NM_INFO, f2fs_nm_info, ra_nid_pages, ra_nid_pages);
 606 F2FS_RW_ATTR(NM_INFO, f2fs_nm_info, dirty_nats_ratio, dirty_nats_ratio);
 607 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, max_victim_search, max_victim_search);
 608 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, migration_granularity, migration_granularity);
 609 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, dir_level, dir_level);
 610 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, cp_interval, interval_time[CP_TIME]);
 611 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, idle_interval, interval_time[REQ_TIME]);
 612 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, discard_idle_interval,
 613                                         interval_time[DISCARD_TIME]);
 614 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, gc_idle_interval, interval_time[GC_TIME]);
 615 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info,
 616                 umount_discard_timeout, interval_time[UMOUNT_DISCARD_TIMEOUT]);
 617 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, iostat_enable, iostat_enable);
 618 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, iostat_period_ms, iostat_period_ms);
 619 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, readdir_ra, readdir_ra);
 620 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, max_io_bytes, max_io_bytes);
 621 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, gc_pin_file_thresh, gc_pin_file_threshold);
 622 F2FS_RW_ATTR(F2FS_SBI, f2fs_super_block, extension_list, extension_list);
 623 #ifdef CONFIG_F2FS_FAULT_INJECTION
 624 F2FS_RW_ATTR(FAULT_INFO_RATE, f2fs_fault_info, inject_rate, inject_rate);
 625 F2FS_RW_ATTR(FAULT_INFO_TYPE, f2fs_fault_info, inject_type, inject_type);
 626 #endif
 627 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, data_io_flag, data_io_flag);
 628 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, node_io_flag, node_io_flag);
 629 F2FS_RW_ATTR(CPRC_INFO, ckpt_req_control, ckpt_thread_ioprio, ckpt_thread_ioprio);
 630 F2FS_GENERAL_RO_ATTR(dirty_segments);
 631 F2FS_GENERAL_RO_ATTR(free_segments);
 632 F2FS_GENERAL_RO_ATTR(lifetime_write_kbytes);
 633 F2FS_GENERAL_RO_ATTR(features);
 634 F2FS_GENERAL_RO_ATTR(current_reserved_blocks);
 635 F2FS_GENERAL_RO_ATTR(unusable);
 636 F2FS_GENERAL_RO_ATTR(encoding);
 637 F2FS_GENERAL_RO_ATTR(mounted_time_sec);
 638 F2FS_GENERAL_RO_ATTR(main_blkaddr);
 639 #ifdef CONFIG_F2FS_STAT_FS
 640 F2FS_STAT_ATTR(STAT_INFO, f2fs_stat_info, cp_foreground_calls, cp_count);
 641 F2FS_STAT_ATTR(STAT_INFO, f2fs_stat_info, cp_background_calls, bg_cp_count);
 642 F2FS_STAT_ATTR(STAT_INFO, f2fs_stat_info, gc_foreground_calls, call_count);
 643 F2FS_STAT_ATTR(STAT_INFO, f2fs_stat_info, gc_background_calls, bg_gc);
 644 F2FS_GENERAL_RO_ATTR(moved_blocks_background);
 645 F2FS_GENERAL_RO_ATTR(moved_blocks_foreground);
 646 F2FS_GENERAL_RO_ATTR(avg_vblocks);
 647 #endif
 648
 649 #ifdef CONFIG_FS_ENCRYPTION
 650 F2FS_FEATURE_RO_ATTR(encryption, FEAT_CRYPTO);
 651 F2FS_FEATURE_RO_ATTR(test_dummy_encryption_v2, FEAT_TEST_DUMMY_ENCRYPTION_V2);
 652 #endif
 653 #ifdef CONFIG_BLK_DEV_ZONED
 654 F2FS_FEATURE_RO_ATTR(block_zoned, FEAT_BLKZONED);
 655 #endif
 656 F2FS_FEATURE_RO_ATTR(atomic_write, FEAT_ATOMIC_WRITE);
 657 F2FS_FEATURE_RO_ATTR(extra_attr, FEAT_EXTRA_ATTR);
 658 F2FS_FEATURE_RO_ATTR(project_quota, FEAT_PROJECT_QUOTA);
 659 F2FS_FEATURE_RO_ATTR(inode_checksum, FEAT_INODE_CHECKSUM);
 660 F2FS_FEATURE_RO_ATTR(flexible_inline_xattr, FEAT_FLEXIBLE_INLINE_XATTR);
 661 F2FS_FEATURE_RO_ATTR(quota_ino, FEAT_QUOTA_INO);
 662 F2FS_FEATURE_RO_ATTR(inode_crtime, FEAT_INODE_CRTIME);
 663 F2FS_FEATURE_RO_ATTR(lost_found, FEAT_LOST_FOUND);
 664 #ifdef CONFIG_FS_VERITY
 665 F2FS_FEATURE_RO_ATTR(verity, FEAT_VERITY);
 666 #endif
 667 F2FS_FEATURE_RO_ATTR(sb_checksum, FEAT_SB_CHECKSUM);
 668 F2FS_FEATURE_RO_ATTR(casefold, FEAT_CASEFOLD);
 669 #ifdef CONFIG_F2FS_FS_COMPRESSION
 670 F2FS_FEATURE_RO_ATTR(compression, FEAT_COMPRESSION);
 671 #endif
 672
 673 #define ATTR_LIST(name) (&f2fs_attr_##name.attr)
 674 static struct attribute *f2fs_attrs[] = {
 675         ATTR_LIST(gc_urgent_sleep_time),
 676         ATTR_LIST(gc_min_sleep_time),
 677         ATTR_LIST(gc_max_sleep_time),
 678         ATTR_LIST(gc_no_gc_sleep_time),
 679         ATTR_LIST(gc_idle),
 680         ATTR_LIST(gc_urgent),
 681         ATTR_LIST(reclaim_segments),
 682         ATTR_LIST(main_blkaddr),
 683         ATTR_LIST(max_small_discards),
 684         ATTR_LIST(discard_granularity),
 685         ATTR_LIST(batched_trim_sections),
 686         ATTR_LIST(ipu_policy),
 687         ATTR_LIST(min_ipu_util),
 688         ATTR_LIST(min_fsync_blocks),
 689         ATTR_LIST(min_seq_blocks),
 690         ATTR_LIST(min_hot_blocks),
 691         ATTR_LIST(min_ssr_sections),
 692         ATTR_LIST(max_victim_search),
 693         ATTR_LIST(migration_granularity),
 694         ATTR_LIST(dir_level),
 695         ATTR_LIST(ram_thresh),
 696         ATTR_LIST(ra_nid_pages),
 697         ATTR_LIST(dirty_nats_ratio),
 698         ATTR_LIST(cp_interval),
 699         ATTR_LIST(idle_interval),
 700         ATTR_LIST(discard_idle_interval),
 701         ATTR_LIST(gc_idle_interval),
 702         ATTR_LIST(umount_discard_timeout),
 703         ATTR_LIST(iostat_enable),
 704         ATTR_LIST(iostat_period_ms),
 705         ATTR_LIST(readdir_ra),
 706         ATTR_LIST(max_io_bytes),
 707         ATTR_LIST(gc_pin_file_thresh),
 708         ATTR_LIST(extension_list),
 709 #ifdef CONFIG_F2FS_FAULT_INJECTION
 710         ATTR_LIST(inject_rate),
 711         ATTR_LIST(inject_type),
 712 #endif
 713         ATTR_LIST(data_io_flag),
 714         ATTR_LIST(node_io_flag),
 715         ATTR_LIST(ckpt_thread_ioprio),
 716         ATTR_LIST(dirty_segments),
 717         ATTR_LIST(free_segments),
 718         ATTR_LIST(unusable),
 719         ATTR_LIST(lifetime_write_kbytes),
 720         ATTR_LIST(features),
 721         ATTR_LIST(reserved_blocks),
 722         ATTR_LIST(current_reserved_blocks),
 723         ATTR_LIST(encoding),
 724         ATTR_LIST(mounted_time_sec),
 725 #ifdef CONFIG_F2FS_STAT_FS
 726         ATTR_LIST(cp_foreground_calls),
 727         ATTR_LIST(cp_background_calls),
 728         ATTR_LIST(gc_foreground_calls),
 729         ATTR_LIST(gc_background_calls),
 730         ATTR_LIST(moved_blocks_foreground),
 731         ATTR_LIST(moved_blocks_background),
 732         ATTR_LIST(avg_vblocks),
 733 #endif
 734         NULL,
 735 };
 736 ATTRIBUTE_GROUPS(f2fs);
 737
 738 static struct attribute *f2fs_feat_attrs[] = {
 739 #ifdef CONFIG_FS_ENCRYPTION
 740         ATTR_LIST(encryption),
 741         ATTR_LIST(test_dummy_encryption_v2),
 742 #endif
 743 #ifdef CONFIG_BLK_DEV_ZONED
 744         ATTR_LIST(block_zoned),
 745 #endif
 746         ATTR_LIST(atomic_write),
 747         ATTR_LIST(extra_attr),
 748         ATTR_LIST(project_quota),
 749         ATTR_LIST(inode_checksum),
 750         ATTR_LIST(flexible_inline_xattr),
 751         ATTR_LIST(quota_ino),
 752         ATTR_LIST(inode_crtime),
 753         ATTR_LIST(lost_found),
 754 #ifdef CONFIG_FS_VERITY
 755         ATTR_LIST(verity),
 756 #endif
 757         ATTR_LIST(sb_checksum),
 758         ATTR_LIST(casefold),
 759 #ifdef CONFIG_F2FS_FS_COMPRESSION
 760         ATTR_LIST(compression),
 761 #endif
 762         NULL,
 763 };
 764 ATTRIBUTE_GROUPS(f2fs_feat);
 765
 766 F2FS_GENERAL_RO_ATTR(sb_status);
 767 static struct attribute *f2fs_stat_attrs[] = {
 768         ATTR_LIST(sb_status),
 769         NULL,
 770 };
 771 ATTRIBUTE_GROUPS(f2fs_stat);
 772
 773 static const struct sysfs_ops f2fs_attr_ops = {
 774         .show   = f2fs_attr_show,
 775         .store  = f2fs_attr_store,
 776 };
 777
 778 static struct kobj_type f2fs_sb_ktype = {
 779         .default_groups = f2fs_groups,
 780         .sysfs_ops      = &f2fs_attr_ops,
 781         .release        = f2fs_sb_release,
 782 };
 783
 784 static struct kobj_type f2fs_ktype = {
 785         .sysfs_ops      = &f2fs_attr_ops,
 786 };
 787
 788 static struct kset f2fs_kset = {
 789         .kobj   = {.ktype = &f2fs_ktype},
 790 };
 791
 792 static struct kobj_type f2fs_feat_ktype = {
 793         .default_groups = f2fs_feat_groups,
 794         .sysfs_ops      = &f2fs_attr_ops,
 795 };
 796
 797 static struct kobject f2fs_feat = {
 798         .kset   = &f2fs_kset,
 799 };
 800
 801 static ssize_t f2fs_stat_attr_show(struct kobject *kobj,
 802                                 struct attribute *attr, char *buf)
 803 {
 804         struct f2fs_sb_info *sbi = container_of(kobj, struct f2fs_sb_info,
 805                                                                 s_stat_kobj);
 806         struct f2fs_attr *a = container_of(attr, struct f2fs_attr, attr);
 807
 808         return a->show ? a->show(a, sbi, buf) : 0;
 809 }
 810
 811 static ssize_t f2fs_stat_attr_store(struct kobject *kobj, struct attribute *attr,
 812                                                 const char *buf, size_t len)
 813 {
 814         struct f2fs_sb_info *sbi = container_of(kobj, struct f2fs_sb_info,
 815                                                                 s_stat_kobj);
 816         struct f2fs_attr *a = container_of(attr, struct f2fs_attr, attr);
 817
 818         return a->store ? a->store(a, sbi, buf, len) : 0;
 819 }
 820
 821 static void f2fs_stat_kobj_release(struct kobject *kobj)
 822 {
 823         struct f2fs_sb_info *sbi = container_of(kobj, struct f2fs_sb_info,
 824                                                                 s_stat_kobj);
 825         complete(&sbi->s_stat_kobj_unregister);
 826 }
 827
 828 static const struct sysfs_ops f2fs_stat_attr_ops = {
 829         .show   = f2fs_stat_attr_show,
 830         .store  = f2fs_stat_attr_store,
 831 };
 832
 833 static struct kobj_type f2fs_stat_ktype = {
 834         .default_groups = f2fs_stat_groups,
 835         .sysfs_ops      = &f2fs_stat_attr_ops,
 836         .release        = f2fs_stat_kobj_release,
 837 };
 838
 839 static int __maybe_unused segment_info_seq_show(struct seq_file *seq,
 840                                                 void *offset)
 841 {
 842         struct super_block *sb = seq->private;
 843         struct f2fs_sb_info *sbi = F2FS_SB(sb);
 844         unsigned int total_segs =
 845                         le32_to_cpu(sbi->raw_super->segment_count_main);
 846         int i;
 847
 848         seq_puts(seq, "format: segment_type|valid_blocks\n"
 849                 "segment_type(0:HD, 1:WD, 2:CD, 3:HN, 4:WN, 5:CN)\n");
 850
 851         for (i = 0; i < total_segs; i++) {
 852                 struct seg_entry *se = get_seg_entry(sbi, i);
 853
 854                 if ((i % 10) == 0)
 855                         seq_printf(seq, "%-10d", i);
 856                 seq_printf(seq, "%d|%-3u", se->type, se->valid_blocks);
 857                 if ((i % 10) == 9 || i == (total_segs - 1))
 858                         seq_putc(seq, '\n');
 859                 else
 860                         seq_putc(seq, ' ');
 861         }
 862
 863         return 0;
 864 }
 865
 866 static int __maybe_unused segment_bits_seq_show(struct seq_file *seq,
 867                                                 void *offset)
 868 {
 869         struct super_block *sb = seq->private;
 870         struct f2fs_sb_info *sbi = F2FS_SB(sb);
 871         unsigned int total_segs =
 872                         le32_to_cpu(sbi->raw_super->segment_count_main);
 873         int i, j;
 874
 875         seq_puts(seq, "format: segment_type|valid_blocks|bitmaps\n"
 876                 "segment_type(0:HD, 1:WD, 2:CD, 3:HN, 4:WN, 5:CN)\n");
 877
 878         for (i = 0; i < total_segs; i++) {
 879                 struct seg_entry *se = get_seg_entry(sbi, i);
 880
 881                 seq_printf(seq, "%-10d", i);
 882                 seq_printf(seq, "%d|%-3u|", se->type, se->valid_blocks);
 883                 for (j = 0; j < SIT_VBLOCK_MAP_SIZE; j++)
 884                         seq_printf(seq, " %.2x", se->cur_valid_map[j]);
 885                 seq_putc(seq, '\n');
 886         }
 887         return 0;
 888 }
 889
 890 void f2fs_record_iostat(struct f2fs_sb_info *sbi)
 891 {
 892         unsigned long long iostat_diff[NR_IO_TYPE];
 893         int i;
 894
 895         if (time_is_after_jiffies(sbi->iostat_next_period))
 896                 return;
 897
 898         /* Need double check under the lock */
 899         spin_lock(&sbi->iostat_lock);
 900         if (time_is_after_jiffies(sbi->iostat_next_period)) {
 901                 spin_unlock(&sbi->iostat_lock);
 902                 return;
 903         }
 904         sbi->iostat_next_period = jiffies +
 905                                 msecs_to_jiffies(sbi->iostat_period_ms);
 906
 907         for (i = 0; i < NR_IO_TYPE; i++) {
 908                 iostat_diff[i] = sbi->rw_iostat[i] -
 909                                 sbi->prev_rw_iostat[i];
 910                 sbi->prev_rw_iostat[i] = sbi->rw_iostat[i];
 911         }
 912         spin_unlock(&sbi->iostat_lock);
 913
 914         trace_f2fs_iostat(sbi, iostat_diff);
 915 }
 916
 917 static int __maybe_unused iostat_info_seq_show(struct seq_file *seq,
 918                                                void *offset)
 919 {
 920         struct super_block *sb = seq->private;
 921         struct f2fs_sb_info *sbi = F2FS_SB(sb);
 922         time64_t now = ktime_get_real_seconds();
 923
 924         if (!sbi->iostat_enable)
 925                 return 0;
 926
 927         seq_printf(seq, "time:          %-16llu\n", now);
 928
 929         /* print app write IOs */
 930         seq_puts(seq, "[WRITE]\n");
 931         seq_printf(seq, "app buffered:  %-16llu\n",
 932                                 sbi->rw_iostat[APP_BUFFERED_IO]);
 933         seq_printf(seq, "app direct:    %-16llu\n",
 934                                 sbi->rw_iostat[APP_DIRECT_IO]);
 935         seq_printf(seq, "app mapped:    %-16llu\n",
 936                                 sbi->rw_iostat[APP_MAPPED_IO]);
 937
 938         /* print fs write IOs */
 939         seq_printf(seq, "fs data:       %-16llu\n",
 940                                 sbi->rw_iostat[FS_DATA_IO]);
 941         seq_printf(seq, "fs node:       %-16llu\n",
 942                                 sbi->rw_iostat[FS_NODE_IO]);
 943         seq_printf(seq, "fs meta:       %-16llu\n",
 944                                 sbi->rw_iostat[FS_META_IO]);
 945         seq_printf(seq, "fs gc data:    %-16llu\n",
 946                                 sbi->rw_iostat[FS_GC_DATA_IO]);
 947         seq_printf(seq, "fs gc node:    %-16llu\n",
 948                                 sbi->rw_iostat[FS_GC_NODE_IO]);
 949         seq_printf(seq, "fs cp data:    %-16llu\n",
 950                                 sbi->rw_iostat[FS_CP_DATA_IO]);
 951         seq_printf(seq, "fs cp node:    %-16llu\n",
 952                                 sbi->rw_iostat[FS_CP_NODE_IO]);
 953         seq_printf(seq, "fs cp meta:    %-16llu\n",
 954                                 sbi->rw_iostat[FS_CP_META_IO]);
 955
 956         /* print app read IOs */
 957         seq_puts(seq, "[READ]\n");
 958         seq_printf(seq, "app buffered:  %-16llu\n",
 959                                 sbi->rw_iostat[APP_BUFFERED_READ_IO]);
 960         seq_printf(seq, "app direct:    %-16llu\n",
 961                                 sbi->rw_iostat[APP_DIRECT_READ_IO]);
 962         seq_printf(seq, "app mapped:    %-16llu\n",
 963                                 sbi->rw_iostat[APP_MAPPED_READ_IO]);
 964
 965         /* print fs read IOs */
 966         seq_printf(seq, "fs data:       %-16llu\n",
 967                                 sbi->rw_iostat[FS_DATA_READ_IO]);
 968         seq_printf(seq, "fs gc data:    %-16llu\n",
 969                                 sbi->rw_iostat[FS_GDATA_READ_IO]);
 970         seq_printf(seq, "fs compr_data: %-16llu\n",
 971                                 sbi->rw_iostat[FS_CDATA_READ_IO]);
 972         seq_printf(seq, "fs node:       %-16llu\n",
 973                                 sbi->rw_iostat[FS_NODE_READ_IO]);
 974         seq_printf(seq, "fs meta:       %-16llu\n",
 975                                 sbi->rw_iostat[FS_META_READ_IO]);
 976
 977         /* print other IOs */
 978         seq_puts(seq, "[OTHER]\n");
 979         seq_printf(seq, "fs discard:    %-16llu\n",
 980                                 sbi->rw_iostat[FS_DISCARD]);
 981
 982         return 0;
 983 }
 984
 985 static int __maybe_unused victim_bits_seq_show(struct seq_file *seq,
 986                                                 void *offset)
 987 {
 988         struct super_block *sb = seq->private;
 989         struct f2fs_sb_info *sbi = F2FS_SB(sb);
 990         struct dirty_seglist_info *dirty_i = DIRTY_I(sbi);
 991         int i;
 992
 993         seq_puts(seq, "format: victim_secmap bitmaps\n");
 994
 995         for (i = 0; i < MAIN_SECS(sbi); i++) {
 996                 if ((i % 10) == 0)
 997                         seq_printf(seq, "%-10d", i);
 998                 seq_printf(seq, "%d", test_bit(i, dirty_i->victim_secmap) ? 1 : 0);
 999                 if ((i % 10) == 9 || i == (MAIN_SECS(sbi) - 1))
1000                         seq_putc(seq, '\n');
1001                 else
1002                         seq_putc(seq, ' ');
1003         }
1004         return 0;
1005 }
1006
1007 int __init f2fs_init_sysfs(void)
1008 {
1009         int ret;
1010
1011         kobject_set_name(&f2fs_kset.kobj, "f2fs");
1012         f2fs_kset.kobj.parent = fs_kobj;
1013         ret = kset_register(&f2fs_kset);
1014         if (ret)
1015                 return ret;
1016
1017         ret = kobject_init_and_add(&f2fs_feat, &f2fs_feat_ktype,
1018                                    NULL, "features");
1019         if (ret) {
1020                 kobject_put(&f2fs_feat);
1021                 kset_unregister(&f2fs_kset);
1022         } else {
1023                 f2fs_proc_root = proc_mkdir("fs/f2fs", NULL);
1024         }
1025         return ret;
1026 }
1027
1028 void f2fs_exit_sysfs(void)
1029 {
1030         kobject_put(&f2fs_feat);
1031         kset_unregister(&f2fs_kset);
1032         remove_proc_entry("fs/f2fs", NULL);
1033         f2fs_proc_root = NULL;
1034 }
1035
1036 int f2fs_register_sysfs(struct f2fs_sb_info *sbi)
1037 {
1038         struct super_block *sb = sbi->sb;
1039         int err;
1040
1041         sbi->s_kobj.kset = &f2fs_kset;
1042         init_completion(&sbi->s_kobj_unregister);
1043         err = kobject_init_and_add(&sbi->s_kobj, &f2fs_sb_ktype, NULL,
1044                                 "%s", sb->s_id);
1045         if (err)
1046                 goto put_sb_kobj;
1047
1048         sbi->s_stat_kobj.kset = &f2fs_kset;
1049         init_completion(&sbi->s_stat_kobj_unregister);
1050         err = kobject_init_and_add(&sbi->s_stat_kobj, &f2fs_stat_ktype,
1051                                                 &sbi->s_kobj, "stat");
1052         if (err)
1053                 goto put_stat_kobj;
1054
1055         if (f2fs_proc_root)
1056                 sbi->s_proc = proc_mkdir(sb->s_id, f2fs_proc_root);
1057
1058         if (sbi->s_proc) {
1059                 proc_create_single_data("segment_info", S_IRUGO, sbi->s_proc,
1060                                 segment_info_seq_show, sb);
1061                 proc_create_single_data("segment_bits", S_IRUGO, sbi->s_proc,
1062                                 segment_bits_seq_show, sb);
1063                 proc_create_single_data("iostat_info", S_IRUGO, sbi->s_proc,
1064                                 iostat_info_seq_show, sb);
1065                 proc_create_single_data("victim_bits", S_IRUGO, sbi->s_proc,
1066                                 victim_bits_seq_show, sb);
1067         }
1068         return 0;
1069 put_stat_kobj:
1070         kobject_put(&sbi->s_stat_kobj);
1071         wait_for_completion(&sbi->s_stat_kobj_unregister);
1072 put_sb_kobj:
1073         kobject_put(&sbi->s_kobj);
1074         wait_for_completion(&sbi->s_kobj_unregister);
1075         return err;
1076 }
1077
1078 void f2fs_unregister_sysfs(struct f2fs_sb_info *sbi)
1079 {
1080         if (sbi->s_proc) {
1081                 remove_proc_entry("iostat_info", sbi->s_proc);
1082                 remove_proc_entry("segment_info", sbi->s_proc);
1083                 remove_proc_entry("segment_bits", sbi->s_proc);
1084                 remove_proc_entry("victim_bits", sbi->s_proc);
1085                 remove_proc_entry(sbi->sb->s_id, f2fs_proc_root);
1086         }
1087
1088         kobject_del(&sbi->s_stat_kobj);
1089         kobject_put(&sbi->s_stat_kobj);
1090         wait_for_completion(&sbi->s_stat_kobj_unregister);
1091
1092         kobject_del(&sbi->s_kobj);
1093         kobject_put(&sbi->s_kobj);
1094         wait_for_completion(&sbi->s_kobj_unregister);
1095 }