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 level = IOPRIO_PRIO_LEVEL(cprc->ckpt_thread_ioprio);
 344
 345                 if (class != IOPRIO_CLASS_RT && class != IOPRIO_CLASS_BE)
 346                         return -EINVAL;
 347
 348                 return sysfs_emit(buf, "%s,%d\n",
 349                         class == IOPRIO_CLASS_RT ? "rt" : "be", level);
 350         }
 351
 352 #ifdef CONFIG_F2FS_FS_COMPRESSION
 353         if (!strcmp(a->attr.name, "compr_written_block"))
 354                 return sysfs_emit(buf, "%llu\n", sbi->compr_written_block);
 355
 356         if (!strcmp(a->attr.name, "compr_saved_block"))
 357                 return sysfs_emit(buf, "%llu\n", sbi->compr_saved_block);
 358
 359         if (!strcmp(a->attr.name, "compr_new_inode"))
 360                 return sysfs_emit(buf, "%u\n", sbi->compr_new_inode);
 361 #endif
 362
 363         if (!strcmp(a->attr.name, "gc_segment_mode"))
 364                 return sysfs_emit(buf, "%u\n", sbi->gc_segment_mode);
 365
 366         if (!strcmp(a->attr.name, "gc_reclaimed_segments")) {
 367                 return sysfs_emit(buf, "%u\n",
 368                         sbi->gc_reclaimed_segs[sbi->gc_segment_mode]);
 369         }
 370
 371         if (!strcmp(a->attr.name, "current_atomic_write")) {
 372                 s64 current_write = atomic64_read(&sbi->current_atomic_write);
 373
 374                 return sysfs_emit(buf, "%lld\n", current_write);
 375         }
 376
 377         if (!strcmp(a->attr.name, "peak_atomic_write"))
 378                 return sysfs_emit(buf, "%lld\n", sbi->peak_atomic_write);
 379
 380         if (!strcmp(a->attr.name, "committed_atomic_block"))
 381                 return sysfs_emit(buf, "%llu\n", sbi->committed_atomic_block);
 382
 383         if (!strcmp(a->attr.name, "revoked_atomic_block"))
 384                 return sysfs_emit(buf, "%llu\n", sbi->revoked_atomic_block);
 385
 386 #ifdef CONFIG_F2FS_STAT_FS
 387         if (!strcmp(a->attr.name, "cp_foreground_calls"))
 388                 return sysfs_emit(buf, "%d\n",
 389                                 atomic_read(&sbi->cp_call_count[TOTAL_CALL]) -
 390                                 atomic_read(&sbi->cp_call_count[BACKGROUND]));
 391         if (!strcmp(a->attr.name, "cp_background_calls"))
 392                 return sysfs_emit(buf, "%d\n",
 393                                 atomic_read(&sbi->cp_call_count[BACKGROUND]));
 394 #endif
 395
 396         ui = (unsigned int *)(ptr + a->offset);
 397
 398         return sysfs_emit(buf, "%u\n", *ui);
 399 }
 400
 401 static ssize_t __sbi_store(struct f2fs_attr *a,
 402                         struct f2fs_sb_info *sbi,
 403                         const char *buf, size_t count)
 404 {
 405         unsigned char *ptr;
 406         unsigned long t;
 407         unsigned int *ui;
 408         ssize_t ret;
 409
 410         ptr = __struct_ptr(sbi, a->struct_type);
 411         if (!ptr)
 412                 return -EINVAL;
 413
 414         if (!strcmp(a->attr.name, "extension_list")) {
 415                 const char *name = strim((char *)buf);
 416                 bool set = true, hot;
 417
 418                 if (!strncmp(name, "[h]", 3))
 419                         hot = true;
 420                 else if (!strncmp(name, "[c]", 3))
 421                         hot = false;
 422                 else
 423                         return -EINVAL;
 424
 425                 name += 3;
 426
 427                 if (*name == '!') {
 428                         name++;
 429                         set = false;
 430                 }
 431
 432                 if (!strlen(name) || strlen(name) >= F2FS_EXTENSION_LEN)
 433                         return -EINVAL;
 434
 435                 f2fs_down_write(&sbi->sb_lock);
 436
 437                 ret = f2fs_update_extension_list(sbi, name, hot, set);
 438                 if (ret)
 439                         goto out;
 440
 441                 ret = f2fs_commit_super(sbi, false);
 442                 if (ret)
 443                         f2fs_update_extension_list(sbi, name, hot, !set);
 444 out:
 445                 f2fs_up_write(&sbi->sb_lock);
 446                 return ret ? ret : count;
 447         }
 448
 449         if (!strcmp(a->attr.name, "ckpt_thread_ioprio")) {
 450                 const char *name = strim((char *)buf);
 451                 struct ckpt_req_control *cprc = &sbi->cprc_info;
 452                 int class;
 453                 long level;
 454                 int ret;
 455
 456                 if (!strncmp(name, "rt,", 3))
 457                         class = IOPRIO_CLASS_RT;
 458                 else if (!strncmp(name, "be,", 3))
 459                         class = IOPRIO_CLASS_BE;
 460                 else
 461                         return -EINVAL;
 462
 463                 name += 3;
 464                 ret = kstrtol(name, 10, &level);
 465                 if (ret)
 466                         return ret;
 467                 if (level >= IOPRIO_NR_LEVELS || level < 0)
 468                         return -EINVAL;
 469
 470                 cprc->ckpt_thread_ioprio = IOPRIO_PRIO_VALUE(class, level);
 471                 if (test_opt(sbi, MERGE_CHECKPOINT)) {
 472                         ret = set_task_ioprio(cprc->f2fs_issue_ckpt,
 473                                         cprc->ckpt_thread_ioprio);
 474                         if (ret)
 475                                 return ret;
 476                 }
 477
 478                 return count;
 479         }
 480
 481         ui = (unsigned int *)(ptr + a->offset);
 482
 483         ret = kstrtoul(skip_spaces(buf), 0, &t);
 484         if (ret < 0)
 485                 return ret;
 486 #ifdef CONFIG_F2FS_FAULT_INJECTION
 487         if (a->struct_type == FAULT_INFO_TYPE) {
 488                 if (f2fs_build_fault_attr(sbi, 0, t))
 489                         return -EINVAL;
 490                 return count;
 491         }
 492         if (a->struct_type == FAULT_INFO_RATE) {
 493                 if (f2fs_build_fault_attr(sbi, t, 0))
 494                         return -EINVAL;
 495                 return count;
 496         }
 497 #endif
 498         if (a->struct_type == RESERVED_BLOCKS) {
 499                 spin_lock(&sbi->stat_lock);
 500                 if (t > (unsigned long)(sbi->user_block_count -
 501                                 F2FS_OPTION(sbi).root_reserved_blocks -
 502                                 SEGS_TO_BLKS(sbi,
 503                                 SM_I(sbi)->additional_reserved_segments))) {
 504                         spin_unlock(&sbi->stat_lock);
 505                         return -EINVAL;
 506                 }
 507                 *ui = t;
 508                 sbi->current_reserved_blocks = min(sbi->reserved_blocks,
 509                                 sbi->user_block_count - valid_user_blocks(sbi));
 510                 spin_unlock(&sbi->stat_lock);
 511                 return count;
 512         }
 513
 514         if (!strcmp(a->attr.name, "discard_io_aware_gran")) {
 515                 if (t > MAX_PLIST_NUM)
 516                         return -EINVAL;
 517                 if (!f2fs_block_unit_discard(sbi))
 518                         return -EINVAL;
 519                 if (t == *ui)
 520                         return count;
 521                 *ui = t;
 522                 return count;
 523         }
 524
 525         if (!strcmp(a->attr.name, "discard_granularity")) {
 526                 if (t == 0 || t > MAX_PLIST_NUM)
 527                         return -EINVAL;
 528                 if (!f2fs_block_unit_discard(sbi))
 529                         return -EINVAL;
 530                 if (t == *ui)
 531                         return count;
 532                 *ui = t;
 533                 return count;
 534         }
 535
 536         if (!strcmp(a->attr.name, "max_ordered_discard")) {
 537                 if (t == 0 || t > MAX_PLIST_NUM)
 538                         return -EINVAL;
 539                 if (!f2fs_block_unit_discard(sbi))
 540                         return -EINVAL;
 541                 *ui = t;
 542                 return count;
 543         }
 544
 545         if (!strcmp(a->attr.name, "discard_urgent_util")) {
 546                 if (t > 100)
 547                         return -EINVAL;
 548                 *ui = t;
 549                 return count;
 550         }
 551
 552         if (!strcmp(a->attr.name, "discard_io_aware")) {
 553                 if (t >= DPOLICY_IO_AWARE_MAX)
 554                         return -EINVAL;
 555                 *ui = t;
 556                 return count;
 557         }
 558
 559         if (!strcmp(a->attr.name, "migration_granularity")) {
 560                 if (t == 0 || t > SEGS_PER_SEC(sbi))
 561                         return -EINVAL;
 562         }
 563
 564         if (!strcmp(a->attr.name, "gc_urgent")) {
 565                 if (t == 0) {
 566                         sbi->gc_mode = GC_NORMAL;
 567                 } else if (t == 1) {
 568                         sbi->gc_mode = GC_URGENT_HIGH;
 569                         if (sbi->gc_thread) {
 570                                 sbi->gc_thread->gc_wake = true;
 571                                 wake_up_interruptible_all(
 572                                         &sbi->gc_thread->gc_wait_queue_head);
 573                                 wake_up_discard_thread(sbi, true);
 574                         }
 575                 } else if (t == 2) {
 576                         sbi->gc_mode = GC_URGENT_LOW;
 577                 } else if (t == 3) {
 578                         sbi->gc_mode = GC_URGENT_MID;
 579                         if (sbi->gc_thread) {
 580                                 sbi->gc_thread->gc_wake = true;
 581                                 wake_up_interruptible_all(
 582                                         &sbi->gc_thread->gc_wait_queue_head);
 583                         }
 584                 } else {
 585                         return -EINVAL;
 586                 }
 587                 return count;
 588         }
 589         if (!strcmp(a->attr.name, "gc_idle")) {
 590                 if (t == GC_IDLE_CB) {
 591                         sbi->gc_mode = GC_IDLE_CB;
 592                 } else if (t == GC_IDLE_GREEDY) {
 593                         sbi->gc_mode = GC_IDLE_GREEDY;
 594                 } else if (t == GC_IDLE_AT) {
 595                         if (!sbi->am.atgc_enabled)
 596                                 return -EINVAL;
 597                         sbi->gc_mode = GC_IDLE_AT;
 598                 } else {
 599                         sbi->gc_mode = GC_NORMAL;
 600                 }
 601                 return count;
 602         }
 603
 604         if (!strcmp(a->attr.name, "gc_remaining_trials")) {
 605                 spin_lock(&sbi->gc_remaining_trials_lock);
 606                 sbi->gc_remaining_trials = t;
 607                 spin_unlock(&sbi->gc_remaining_trials_lock);
 608
 609                 return count;
 610         }
 611
 612 #ifdef CONFIG_F2FS_IOSTAT
 613         if (!strcmp(a->attr.name, "iostat_enable")) {
 614                 sbi->iostat_enable = !!t;
 615                 if (!sbi->iostat_enable)
 616                         f2fs_reset_iostat(sbi);
 617                 return count;
 618         }
 619
 620         if (!strcmp(a->attr.name, "iostat_period_ms")) {
 621                 if (t < MIN_IOSTAT_PERIOD_MS || t > MAX_IOSTAT_PERIOD_MS)
 622                         return -EINVAL;
 623                 spin_lock_irq(&sbi->iostat_lock);
 624                 sbi->iostat_period_ms = (unsigned int)t;
 625                 spin_unlock_irq(&sbi->iostat_lock);
 626                 return count;
 627         }
 628 #endif
 629
 630 #ifdef CONFIG_F2FS_FS_COMPRESSION
 631         if (!strcmp(a->attr.name, "compr_written_block") ||
 632                 !strcmp(a->attr.name, "compr_saved_block")) {
 633                 if (t != 0)
 634                         return -EINVAL;
 635                 sbi->compr_written_block = 0;
 636                 sbi->compr_saved_block = 0;
 637                 return count;
 638         }
 639
 640         if (!strcmp(a->attr.name, "compr_new_inode")) {
 641                 if (t != 0)
 642                         return -EINVAL;
 643                 sbi->compr_new_inode = 0;
 644                 return count;
 645         }
 646
 647         if (!strcmp(a->attr.name, "compress_percent")) {
 648                 if (t == 0 || t > 100)
 649                         return -EINVAL;
 650                 *ui = t;
 651                 return count;
 652         }
 653
 654         if (!strcmp(a->attr.name, "compress_watermark")) {
 655                 if (t == 0 || t > 100)
 656                         return -EINVAL;
 657                 *ui = t;
 658                 return count;
 659         }
 660 #endif
 661
 662         if (!strcmp(a->attr.name, "atgc_candidate_ratio")) {
 663                 if (t > 100)
 664                         return -EINVAL;
 665                 sbi->am.candidate_ratio = t;
 666                 return count;
 667         }
 668
 669         if (!strcmp(a->attr.name, "atgc_age_weight")) {
 670                 if (t > 100)
 671                         return -EINVAL;
 672                 sbi->am.age_weight = t;
 673                 return count;
 674         }
 675
 676         if (!strcmp(a->attr.name, "gc_segment_mode")) {
 677                 if (t < MAX_GC_MODE)
 678                         sbi->gc_segment_mode = t;
 679                 else
 680                         return -EINVAL;
 681                 return count;
 682         }
 683
 684         if (!strcmp(a->attr.name, "gc_pin_file_threshold")) {
 685                 if (t > MAX_GC_FAILED_PINNED_FILES)
 686                         return -EINVAL;
 687                 sbi->gc_pin_file_threshold = t;
 688                 return count;
 689         }
 690
 691         if (!strcmp(a->attr.name, "gc_reclaimed_segments")) {
 692                 if (t != 0)
 693                         return -EINVAL;
 694                 sbi->gc_reclaimed_segs[sbi->gc_segment_mode] = 0;
 695                 return count;
 696         }
 697
 698         if (!strcmp(a->attr.name, "seq_file_ra_mul")) {
 699                 if (t >= MIN_RA_MUL && t <= MAX_RA_MUL)
 700                         sbi->seq_file_ra_mul = t;
 701                 else
 702                         return -EINVAL;
 703                 return count;
 704         }
 705
 706         if (!strcmp(a->attr.name, "max_fragment_chunk")) {
 707                 if (t >= MIN_FRAGMENT_SIZE && t <= MAX_FRAGMENT_SIZE)
 708                         sbi->max_fragment_chunk = t;
 709                 else
 710                         return -EINVAL;
 711                 return count;
 712         }
 713
 714         if (!strcmp(a->attr.name, "max_fragment_hole")) {
 715                 if (t >= MIN_FRAGMENT_SIZE && t <= MAX_FRAGMENT_SIZE)
 716                         sbi->max_fragment_hole = t;
 717                 else
 718                         return -EINVAL;
 719                 return count;
 720         }
 721
 722         if (!strcmp(a->attr.name, "peak_atomic_write")) {
 723                 if (t != 0)
 724                         return -EINVAL;
 725                 sbi->peak_atomic_write = 0;
 726                 return count;
 727         }
 728
 729         if (!strcmp(a->attr.name, "committed_atomic_block")) {
 730                 if (t != 0)
 731                         return -EINVAL;
 732                 sbi->committed_atomic_block = 0;
 733                 return count;
 734         }
 735
 736         if (!strcmp(a->attr.name, "revoked_atomic_block")) {
 737                 if (t != 0)
 738                         return -EINVAL;
 739                 sbi->revoked_atomic_block = 0;
 740                 return count;
 741         }
 742
 743         if (!strcmp(a->attr.name, "readdir_ra")) {
 744                 sbi->readdir_ra = !!t;
 745                 return count;
 746         }
 747
 748         if (!strcmp(a->attr.name, "hot_data_age_threshold")) {
 749                 if (t == 0 || t >= sbi->warm_data_age_threshold)
 750                         return -EINVAL;
 751                 if (t == *ui)
 752                         return count;
 753                 *ui = (unsigned int)t;
 754                 return count;
 755         }
 756
 757         if (!strcmp(a->attr.name, "warm_data_age_threshold")) {
 758                 if (t <= sbi->hot_data_age_threshold)
 759                         return -EINVAL;
 760                 if (t == *ui)
 761                         return count;
 762                 *ui = (unsigned int)t;
 763                 return count;
 764         }
 765
 766         if (!strcmp(a->attr.name, "last_age_weight")) {
 767                 if (t > 100)
 768                         return -EINVAL;
 769                 if (t == *ui)
 770                         return count;
 771                 *ui = (unsigned int)t;
 772                 return count;
 773         }
 774
 775         if (!strcmp(a->attr.name, "ipu_policy")) {
 776                 if (t >= BIT(F2FS_IPU_MAX))
 777                         return -EINVAL;
 778                 if (t && f2fs_lfs_mode(sbi))
 779                         return -EINVAL;
 780                 SM_I(sbi)->ipu_policy = (unsigned int)t;
 781                 return count;
 782         }
 783
 784         if (!strcmp(a->attr.name, "dir_level")) {
 785                 if (t > MAX_DIR_HASH_DEPTH)
 786                         return -EINVAL;
 787                 sbi->dir_level = t;
 788                 return count;
 789         }
 790
 791         *ui = (unsigned int)t;
 792
 793         return count;
 794 }
 795
 796 static ssize_t f2fs_sbi_store(struct f2fs_attr *a,
 797                         struct f2fs_sb_info *sbi,
 798                         const char *buf, size_t count)
 799 {
 800         ssize_t ret;
 801         bool gc_entry = (!strcmp(a->attr.name, "gc_urgent") ||
 802                                         a->struct_type == GC_THREAD);
 803
 804         if (gc_entry) {
 805                 if (!down_read_trylock(&sbi->sb->s_umount))
 806                         return -EAGAIN;
 807         }
 808         ret = __sbi_store(a, sbi, buf, count);
 809         if (gc_entry)
 810                 up_read(&sbi->sb->s_umount);
 811
 812         return ret;
 813 }
 814
 815 static ssize_t f2fs_attr_show(struct kobject *kobj,
 816                                 struct attribute *attr, char *buf)
 817 {
 818         struct f2fs_sb_info *sbi = container_of(kobj, struct f2fs_sb_info,
 819                                                                 s_kobj);
 820         struct f2fs_attr *a = container_of(attr, struct f2fs_attr, attr);
 821
 822         return a->show ? a->show(a, sbi, buf) : 0;
 823 }
 824
 825 static ssize_t f2fs_attr_store(struct kobject *kobj, struct attribute *attr,
 826                                                 const char *buf, size_t len)
 827 {
 828         struct f2fs_sb_info *sbi = container_of(kobj, struct f2fs_sb_info,
 829                                                                         s_kobj);
 830         struct f2fs_attr *a = container_of(attr, struct f2fs_attr, attr);
 831
 832         return a->store ? a->store(a, sbi, buf, len) : 0;
 833 }
 834
 835 static void f2fs_sb_release(struct kobject *kobj)
 836 {
 837         struct f2fs_sb_info *sbi = container_of(kobj, struct f2fs_sb_info,
 838                                                                 s_kobj);
 839         complete(&sbi->s_kobj_unregister);
 840 }
 841
 842 /*
 843  * Note that there are three feature list entries:
 844  * 1) /sys/fs/f2fs/features
 845  *   : shows runtime features supported by in-kernel f2fs along with Kconfig.
 846  *     - ref. F2FS_FEATURE_RO_ATTR()
 847  *
 848  * 2) /sys/fs/f2fs/$s_id/features <deprecated>
 849  *   : shows on-disk features enabled by mkfs.f2fs, used for old kernels. This
 850  *     won't add new feature anymore, and thus, users should check entries in 3)
 851  *     instead of this 2).
 852  *
 853  * 3) /sys/fs/f2fs/$s_id/feature_list
 854  *   : shows on-disk features enabled by mkfs.f2fs per instance, which follows
 855  *     sysfs entry rule where each entry should expose single value.
 856  *     This list covers old feature list provided by 2) and beyond. Therefore,
 857  *     please add new on-disk feature in this list only.
 858  *     - ref. F2FS_SB_FEATURE_RO_ATTR()
 859  */
 860 static ssize_t f2fs_feature_show(struct f2fs_attr *a,
 861                 struct f2fs_sb_info *sbi, char *buf)
 862 {
 863         return sysfs_emit(buf, "supported\n");
 864 }
 865
 866 #define F2FS_FEATURE_RO_ATTR(_name)                             \
 867 static struct f2fs_attr f2fs_attr_##_name = {                   \
 868         .attr = {.name = __stringify(_name), .mode = 0444 },    \
 869         .show   = f2fs_feature_show,                            \
 870 }
 871
 872 static ssize_t f2fs_sb_feature_show(struct f2fs_attr *a,
 873                 struct f2fs_sb_info *sbi, char *buf)
 874 {
 875         if (F2FS_HAS_FEATURE(sbi, a->id))
 876                 return sysfs_emit(buf, "supported\n");
 877         return sysfs_emit(buf, "unsupported\n");
 878 }
 879
 880 #define F2FS_SB_FEATURE_RO_ATTR(_name, _feat)                   \
 881 static struct f2fs_attr f2fs_attr_sb_##_name = {                \
 882         .attr = {.name = __stringify(_name), .mode = 0444 },    \
 883         .show   = f2fs_sb_feature_show,                         \
 884         .id     = F2FS_FEATURE_##_feat,                         \
 885 }
 886
 887 #define F2FS_ATTR_OFFSET(_struct_type, _name, _mode, _show, _store, _offset) \
 888 static struct f2fs_attr f2fs_attr_##_name = {                   \
 889         .attr = {.name = __stringify(_name), .mode = _mode },   \
 890         .show   = _show,                                        \
 891         .store  = _store,                                       \
 892         .struct_type = _struct_type,                            \
 893         .offset = _offset                                       \
 894 }
 895
 896 #define F2FS_RO_ATTR(struct_type, struct_name, name, elname)    \
 897         F2FS_ATTR_OFFSET(struct_type, name, 0444,               \
 898                 f2fs_sbi_show, NULL,                            \
 899                 offsetof(struct struct_name, elname))
 900
 901 #define F2FS_RW_ATTR(struct_type, struct_name, name, elname)    \
 902         F2FS_ATTR_OFFSET(struct_type, name, 0644,               \
 903                 f2fs_sbi_show, f2fs_sbi_store,                  \
 904                 offsetof(struct struct_name, elname))
 905
 906 #define F2FS_GENERAL_RO_ATTR(name) \
 907 static struct f2fs_attr f2fs_attr_##name = __ATTR(name, 0444, name##_show, NULL)
 908
 909 #ifdef CONFIG_F2FS_STAT_FS
 910 #define STAT_INFO_RO_ATTR(name, elname)                         \
 911         F2FS_RO_ATTR(STAT_INFO, f2fs_stat_info, name, elname)
 912 #endif
 913
 914 #define GC_THREAD_RW_ATTR(name, elname)                         \
 915         F2FS_RW_ATTR(GC_THREAD, f2fs_gc_kthread, name, elname)
 916
 917 #define SM_INFO_RW_ATTR(name, elname)                           \
 918         F2FS_RW_ATTR(SM_INFO, f2fs_sm_info, name, elname)
 919
 920 #define SM_INFO_GENERAL_RW_ATTR(elname)                         \
 921         SM_INFO_RW_ATTR(elname, elname)
 922
 923 #define DCC_INFO_RW_ATTR(name, elname)                          \
 924         F2FS_RW_ATTR(DCC_INFO, discard_cmd_control, name, elname)
 925
 926 #define DCC_INFO_GENERAL_RW_ATTR(elname)                        \
 927         DCC_INFO_RW_ATTR(elname, elname)
 928
 929 #define NM_INFO_RW_ATTR(name, elname)                           \
 930         F2FS_RW_ATTR(NM_INFO, f2fs_nm_info, name, elname)
 931
 932 #define NM_INFO_GENERAL_RW_ATTR(elname)                         \
 933         NM_INFO_RW_ATTR(elname, elname)
 934
 935 #define F2FS_SBI_RW_ATTR(name, elname)                          \
 936         F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, name, elname)
 937
 938 #define F2FS_SBI_GENERAL_RW_ATTR(elname)                        \
 939         F2FS_SBI_RW_ATTR(elname, elname)
 940
 941 #define F2FS_SBI_GENERAL_RO_ATTR(elname)                        \
 942         F2FS_RO_ATTR(F2FS_SBI, f2fs_sb_info, elname, elname)
 943
 944 #ifdef CONFIG_F2FS_FAULT_INJECTION
 945 #define FAULT_INFO_GENERAL_RW_ATTR(type, elname)                \
 946         F2FS_RW_ATTR(type, f2fs_fault_info, elname, elname)
 947 #endif
 948
 949 #define RESERVED_BLOCKS_GENERAL_RW_ATTR(elname)                 \
 950         F2FS_RW_ATTR(RESERVED_BLOCKS, f2fs_sb_info, elname, elname)
 951
 952 #define CPRC_INFO_GENERAL_RW_ATTR(elname)                       \
 953         F2FS_RW_ATTR(CPRC_INFO, ckpt_req_control, elname, elname)
 954
 955 #define ATGC_INFO_RW_ATTR(name, elname)                         \
 956         F2FS_RW_ATTR(ATGC_INFO, atgc_management, name, elname)
 957
 958 /* GC_THREAD ATTR */
 959 GC_THREAD_RW_ATTR(gc_urgent_sleep_time, urgent_sleep_time);
 960 GC_THREAD_RW_ATTR(gc_min_sleep_time, min_sleep_time);
 961 GC_THREAD_RW_ATTR(gc_max_sleep_time, max_sleep_time);
 962 GC_THREAD_RW_ATTR(gc_no_gc_sleep_time, no_gc_sleep_time);
 963
 964 /* SM_INFO ATTR */
 965 SM_INFO_RW_ATTR(reclaim_segments, rec_prefree_segments);
 966 SM_INFO_GENERAL_RW_ATTR(ipu_policy);
 967 SM_INFO_GENERAL_RW_ATTR(min_ipu_util);
 968 SM_INFO_GENERAL_RW_ATTR(min_fsync_blocks);
 969 SM_INFO_GENERAL_RW_ATTR(min_seq_blocks);
 970 SM_INFO_GENERAL_RW_ATTR(min_hot_blocks);
 971 SM_INFO_GENERAL_RW_ATTR(min_ssr_sections);
 972
 973 /* DCC_INFO ATTR */
 974 DCC_INFO_RW_ATTR(max_small_discards, max_discards);
 975 DCC_INFO_GENERAL_RW_ATTR(max_discard_request);
 976 DCC_INFO_GENERAL_RW_ATTR(min_discard_issue_time);
 977 DCC_INFO_GENERAL_RW_ATTR(mid_discard_issue_time);
 978 DCC_INFO_GENERAL_RW_ATTR(max_discard_issue_time);
 979 DCC_INFO_GENERAL_RW_ATTR(discard_io_aware_gran);
 980 DCC_INFO_GENERAL_RW_ATTR(discard_urgent_util);
 981 DCC_INFO_GENERAL_RW_ATTR(discard_granularity);
 982 DCC_INFO_GENERAL_RW_ATTR(max_ordered_discard);
 983 DCC_INFO_GENERAL_RW_ATTR(discard_io_aware);
 984
 985 /* NM_INFO ATTR */
 986 NM_INFO_RW_ATTR(max_roll_forward_node_blocks, max_rf_node_blocks);
 987 NM_INFO_GENERAL_RW_ATTR(ram_thresh);
 988 NM_INFO_GENERAL_RW_ATTR(ra_nid_pages);
 989 NM_INFO_GENERAL_RW_ATTR(dirty_nats_ratio);
 990
 991 /* F2FS_SBI ATTR */
 992 F2FS_RW_ATTR(F2FS_SBI, f2fs_super_block, extension_list, extension_list);
 993 F2FS_SBI_RW_ATTR(gc_idle, gc_mode);
 994 F2FS_SBI_RW_ATTR(gc_urgent, gc_mode);
 995 F2FS_SBI_RW_ATTR(cp_interval, interval_time[CP_TIME]);
 996 F2FS_SBI_RW_ATTR(idle_interval, interval_time[REQ_TIME]);
 997 F2FS_SBI_RW_ATTR(discard_idle_interval, interval_time[DISCARD_TIME]);
 998 F2FS_SBI_RW_ATTR(gc_idle_interval, interval_time[GC_TIME]);
 999 F2FS_SBI_RW_ATTR(umount_discard_timeout, interval_time[UMOUNT_DISCARD_TIMEOUT]);
1000 F2FS_SBI_RW_ATTR(gc_pin_file_thresh, gc_pin_file_threshold);
1001 F2FS_SBI_RW_ATTR(gc_reclaimed_segments, gc_reclaimed_segs);
1002 F2FS_SBI_GENERAL_RW_ATTR(max_victim_search);
1003 F2FS_SBI_GENERAL_RW_ATTR(migration_granularity);
1004 F2FS_SBI_GENERAL_RW_ATTR(dir_level);
1005 #ifdef CONFIG_F2FS_IOSTAT
1006 F2FS_SBI_GENERAL_RW_ATTR(iostat_enable);
1007 F2FS_SBI_GENERAL_RW_ATTR(iostat_period_ms);
1008 #endif
1009 F2FS_SBI_GENERAL_RW_ATTR(readdir_ra);
1010 F2FS_SBI_GENERAL_RW_ATTR(max_io_bytes);
1011 F2FS_SBI_GENERAL_RW_ATTR(data_io_flag);
1012 F2FS_SBI_GENERAL_RW_ATTR(node_io_flag);
1013 F2FS_SBI_GENERAL_RW_ATTR(gc_remaining_trials);
1014 F2FS_SBI_GENERAL_RW_ATTR(seq_file_ra_mul);
1015 F2FS_SBI_GENERAL_RW_ATTR(gc_segment_mode);
1016 F2FS_SBI_GENERAL_RW_ATTR(max_fragment_chunk);
1017 F2FS_SBI_GENERAL_RW_ATTR(max_fragment_hole);
1018 #ifdef CONFIG_F2FS_FS_COMPRESSION
1019 F2FS_SBI_GENERAL_RW_ATTR(compr_written_block);
1020 F2FS_SBI_GENERAL_RW_ATTR(compr_saved_block);
1021 F2FS_SBI_GENERAL_RW_ATTR(compr_new_inode);
1022 F2FS_SBI_GENERAL_RW_ATTR(compress_percent);
1023 F2FS_SBI_GENERAL_RW_ATTR(compress_watermark);
1024 #endif
1025 /* atomic write */
1026 F2FS_SBI_GENERAL_RO_ATTR(current_atomic_write);
1027 F2FS_SBI_GENERAL_RW_ATTR(peak_atomic_write);
1028 F2FS_SBI_GENERAL_RW_ATTR(committed_atomic_block);
1029 F2FS_SBI_GENERAL_RW_ATTR(revoked_atomic_block);
1030 /* block age extent cache */
1031 F2FS_SBI_GENERAL_RW_ATTR(hot_data_age_threshold);
1032 F2FS_SBI_GENERAL_RW_ATTR(warm_data_age_threshold);
1033 F2FS_SBI_GENERAL_RW_ATTR(last_age_weight);
1034 #ifdef CONFIG_BLK_DEV_ZONED
1035 F2FS_SBI_GENERAL_RO_ATTR(unusable_blocks_per_sec);
1036 #endif
1037
1038 /* STAT_INFO ATTR */
1039 #ifdef CONFIG_F2FS_STAT_FS
1040 STAT_INFO_RO_ATTR(cp_foreground_calls, cp_call_count[FOREGROUND]);
1041 STAT_INFO_RO_ATTR(cp_background_calls, cp_call_count[BACKGROUND]);
1042 STAT_INFO_RO_ATTR(gc_foreground_calls, gc_call_count[FOREGROUND]);
1043 STAT_INFO_RO_ATTR(gc_background_calls, gc_call_count[BACKGROUND]);
1044 #endif
1045
1046 /* FAULT_INFO ATTR */
1047 #ifdef CONFIG_F2FS_FAULT_INJECTION
1048 FAULT_INFO_GENERAL_RW_ATTR(FAULT_INFO_RATE, inject_rate);
1049 FAULT_INFO_GENERAL_RW_ATTR(FAULT_INFO_TYPE, inject_type);
1050 #endif
1051
1052 /* RESERVED_BLOCKS ATTR */
1053 RESERVED_BLOCKS_GENERAL_RW_ATTR(reserved_blocks);
1054
1055 /* CPRC_INFO ATTR */
1056 CPRC_INFO_GENERAL_RW_ATTR(ckpt_thread_ioprio);
1057
1058 /* ATGC_INFO ATTR */
1059 ATGC_INFO_RW_ATTR(atgc_candidate_ratio, candidate_ratio);
1060 ATGC_INFO_RW_ATTR(atgc_candidate_count, max_candidate_count);
1061 ATGC_INFO_RW_ATTR(atgc_age_weight, age_weight);
1062 ATGC_INFO_RW_ATTR(atgc_age_threshold, age_threshold);
1063
1064 F2FS_GENERAL_RO_ATTR(dirty_segments);
1065 F2FS_GENERAL_RO_ATTR(free_segments);
1066 F2FS_GENERAL_RO_ATTR(ovp_segments);
1067 F2FS_GENERAL_RO_ATTR(lifetime_write_kbytes);
1068 F2FS_GENERAL_RO_ATTR(features);
1069 F2FS_GENERAL_RO_ATTR(current_reserved_blocks);
1070 F2FS_GENERAL_RO_ATTR(unusable);
1071 F2FS_GENERAL_RO_ATTR(encoding);
1072 F2FS_GENERAL_RO_ATTR(mounted_time_sec);
1073 F2FS_GENERAL_RO_ATTR(main_blkaddr);
1074 F2FS_GENERAL_RO_ATTR(pending_discard);
1075 F2FS_GENERAL_RO_ATTR(gc_mode);
1076 #ifdef CONFIG_F2FS_STAT_FS
1077 F2FS_GENERAL_RO_ATTR(moved_blocks_background);
1078 F2FS_GENERAL_RO_ATTR(moved_blocks_foreground);
1079 F2FS_GENERAL_RO_ATTR(avg_vblocks);
1080 #endif
1081
1082 #ifdef CONFIG_FS_ENCRYPTION
1083 F2FS_FEATURE_RO_ATTR(encryption);
1084 F2FS_FEATURE_RO_ATTR(test_dummy_encryption_v2);
1085 #if IS_ENABLED(CONFIG_UNICODE)
1086 F2FS_FEATURE_RO_ATTR(encrypted_casefold);
1087 #endif
1088 #endif /* CONFIG_FS_ENCRYPTION */
1089 #ifdef CONFIG_BLK_DEV_ZONED
1090 F2FS_FEATURE_RO_ATTR(block_zoned);
1091 #endif
1092 F2FS_FEATURE_RO_ATTR(atomic_write);
1093 F2FS_FEATURE_RO_ATTR(extra_attr);
1094 F2FS_FEATURE_RO_ATTR(project_quota);
1095 F2FS_FEATURE_RO_ATTR(inode_checksum);
1096 F2FS_FEATURE_RO_ATTR(flexible_inline_xattr);
1097 F2FS_FEATURE_RO_ATTR(quota_ino);
1098 F2FS_FEATURE_RO_ATTR(inode_crtime);
1099 F2FS_FEATURE_RO_ATTR(lost_found);
1100 #ifdef CONFIG_FS_VERITY
1101 F2FS_FEATURE_RO_ATTR(verity);
1102 #endif
1103 F2FS_FEATURE_RO_ATTR(sb_checksum);
1104 #if IS_ENABLED(CONFIG_UNICODE)
1105 F2FS_FEATURE_RO_ATTR(casefold);
1106 #endif
1107 F2FS_FEATURE_RO_ATTR(readonly);
1108 #ifdef CONFIG_F2FS_FS_COMPRESSION
1109 F2FS_FEATURE_RO_ATTR(compression);
1110 #endif
1111 F2FS_FEATURE_RO_ATTR(pin_file);
1112
1113 #define ATTR_LIST(name) (&f2fs_attr_##name.attr)
1114 static struct attribute *f2fs_attrs[] = {
1115         ATTR_LIST(gc_urgent_sleep_time),
1116         ATTR_LIST(gc_min_sleep_time),
1117         ATTR_LIST(gc_max_sleep_time),
1118         ATTR_LIST(gc_no_gc_sleep_time),
1119         ATTR_LIST(gc_idle),
1120         ATTR_LIST(gc_urgent),
1121         ATTR_LIST(reclaim_segments),
1122         ATTR_LIST(main_blkaddr),
1123         ATTR_LIST(max_small_discards),
1124         ATTR_LIST(max_discard_request),
1125         ATTR_LIST(min_discard_issue_time),
1126         ATTR_LIST(mid_discard_issue_time),
1127         ATTR_LIST(max_discard_issue_time),
1128         ATTR_LIST(discard_io_aware_gran),
1129         ATTR_LIST(discard_urgent_util),
1130         ATTR_LIST(discard_granularity),
1131         ATTR_LIST(max_ordered_discard),
1132         ATTR_LIST(discard_io_aware),
1133         ATTR_LIST(pending_discard),
1134         ATTR_LIST(gc_mode),
1135         ATTR_LIST(ipu_policy),
1136         ATTR_LIST(min_ipu_util),
1137         ATTR_LIST(min_fsync_blocks),
1138         ATTR_LIST(min_seq_blocks),
1139         ATTR_LIST(min_hot_blocks),
1140         ATTR_LIST(min_ssr_sections),
1141         ATTR_LIST(max_victim_search),
1142         ATTR_LIST(migration_granularity),
1143         ATTR_LIST(dir_level),
1144         ATTR_LIST(ram_thresh),
1145         ATTR_LIST(ra_nid_pages),
1146         ATTR_LIST(dirty_nats_ratio),
1147         ATTR_LIST(max_roll_forward_node_blocks),
1148         ATTR_LIST(cp_interval),
1149         ATTR_LIST(idle_interval),
1150         ATTR_LIST(discard_idle_interval),
1151         ATTR_LIST(gc_idle_interval),
1152         ATTR_LIST(umount_discard_timeout),
1153 #ifdef CONFIG_F2FS_IOSTAT
1154         ATTR_LIST(iostat_enable),
1155         ATTR_LIST(iostat_period_ms),
1156 #endif
1157         ATTR_LIST(readdir_ra),
1158         ATTR_LIST(max_io_bytes),
1159         ATTR_LIST(gc_pin_file_thresh),
1160         ATTR_LIST(extension_list),
1161 #ifdef CONFIG_F2FS_FAULT_INJECTION
1162         ATTR_LIST(inject_rate),
1163         ATTR_LIST(inject_type),
1164 #endif
1165         ATTR_LIST(data_io_flag),
1166         ATTR_LIST(node_io_flag),
1167         ATTR_LIST(gc_remaining_trials),
1168         ATTR_LIST(ckpt_thread_ioprio),
1169         ATTR_LIST(dirty_segments),
1170         ATTR_LIST(free_segments),
1171         ATTR_LIST(ovp_segments),
1172         ATTR_LIST(unusable),
1173         ATTR_LIST(lifetime_write_kbytes),
1174         ATTR_LIST(features),
1175         ATTR_LIST(reserved_blocks),
1176         ATTR_LIST(current_reserved_blocks),
1177         ATTR_LIST(encoding),
1178         ATTR_LIST(mounted_time_sec),
1179 #ifdef CONFIG_F2FS_STAT_FS
1180         ATTR_LIST(cp_foreground_calls),
1181         ATTR_LIST(cp_background_calls),
1182         ATTR_LIST(gc_foreground_calls),
1183         ATTR_LIST(gc_background_calls),
1184         ATTR_LIST(moved_blocks_foreground),
1185         ATTR_LIST(moved_blocks_background),
1186         ATTR_LIST(avg_vblocks),
1187 #endif
1188 #ifdef CONFIG_BLK_DEV_ZONED
1189         ATTR_LIST(unusable_blocks_per_sec),
1190 #endif
1191 #ifdef CONFIG_F2FS_FS_COMPRESSION
1192         ATTR_LIST(compr_written_block),
1193         ATTR_LIST(compr_saved_block),
1194         ATTR_LIST(compr_new_inode),
1195         ATTR_LIST(compress_percent),
1196         ATTR_LIST(compress_watermark),
1197 #endif
1198         /* For ATGC */
1199         ATTR_LIST(atgc_candidate_ratio),
1200         ATTR_LIST(atgc_candidate_count),
1201         ATTR_LIST(atgc_age_weight),
1202         ATTR_LIST(atgc_age_threshold),
1203         ATTR_LIST(seq_file_ra_mul),
1204         ATTR_LIST(gc_segment_mode),
1205         ATTR_LIST(gc_reclaimed_segments),
1206         ATTR_LIST(max_fragment_chunk),
1207         ATTR_LIST(max_fragment_hole),
1208         ATTR_LIST(current_atomic_write),
1209         ATTR_LIST(peak_atomic_write),
1210         ATTR_LIST(committed_atomic_block),
1211         ATTR_LIST(revoked_atomic_block),
1212         ATTR_LIST(hot_data_age_threshold),
1213         ATTR_LIST(warm_data_age_threshold),
1214         ATTR_LIST(last_age_weight),
1215         NULL,
1216 };
1217 ATTRIBUTE_GROUPS(f2fs);
1218
1219 static struct attribute *f2fs_feat_attrs[] = {
1220 #ifdef CONFIG_FS_ENCRYPTION
1221         ATTR_LIST(encryption),
1222         ATTR_LIST(test_dummy_encryption_v2),
1223 #if IS_ENABLED(CONFIG_UNICODE)
1224         ATTR_LIST(encrypted_casefold),
1225 #endif
1226 #endif /* CONFIG_FS_ENCRYPTION */
1227 #ifdef CONFIG_BLK_DEV_ZONED
1228         ATTR_LIST(block_zoned),
1229 #endif
1230         ATTR_LIST(atomic_write),
1231         ATTR_LIST(extra_attr),
1232         ATTR_LIST(project_quota),
1233         ATTR_LIST(inode_checksum),
1234         ATTR_LIST(flexible_inline_xattr),
1235         ATTR_LIST(quota_ino),
1236         ATTR_LIST(inode_crtime),
1237         ATTR_LIST(lost_found),
1238 #ifdef CONFIG_FS_VERITY
1239         ATTR_LIST(verity),
1240 #endif
1241         ATTR_LIST(sb_checksum),
1242 #if IS_ENABLED(CONFIG_UNICODE)
1243         ATTR_LIST(casefold),
1244 #endif
1245         ATTR_LIST(readonly),
1246 #ifdef CONFIG_F2FS_FS_COMPRESSION
1247         ATTR_LIST(compression),
1248 #endif
1249         ATTR_LIST(pin_file),
1250         NULL,
1251 };
1252 ATTRIBUTE_GROUPS(f2fs_feat);
1253
1254 F2FS_GENERAL_RO_ATTR(sb_status);
1255 F2FS_GENERAL_RO_ATTR(cp_status);
1256 F2FS_GENERAL_RO_ATTR(issued_discard);
1257 F2FS_GENERAL_RO_ATTR(queued_discard);
1258 F2FS_GENERAL_RO_ATTR(undiscard_blks);
1259
1260 static struct attribute *f2fs_stat_attrs[] = {
1261         ATTR_LIST(sb_status),
1262         ATTR_LIST(cp_status),
1263         ATTR_LIST(issued_discard),
1264         ATTR_LIST(queued_discard),
1265         ATTR_LIST(undiscard_blks),
1266         NULL,
1267 };
1268 ATTRIBUTE_GROUPS(f2fs_stat);
1269
1270 F2FS_SB_FEATURE_RO_ATTR(encryption, ENCRYPT);
1271 F2FS_SB_FEATURE_RO_ATTR(block_zoned, BLKZONED);
1272 F2FS_SB_FEATURE_RO_ATTR(extra_attr, EXTRA_ATTR);
1273 F2FS_SB_FEATURE_RO_ATTR(project_quota, PRJQUOTA);
1274 F2FS_SB_FEATURE_RO_ATTR(inode_checksum, INODE_CHKSUM);
1275 F2FS_SB_FEATURE_RO_ATTR(flexible_inline_xattr, FLEXIBLE_INLINE_XATTR);
1276 F2FS_SB_FEATURE_RO_ATTR(quota_ino, QUOTA_INO);
1277 F2FS_SB_FEATURE_RO_ATTR(inode_crtime, INODE_CRTIME);
1278 F2FS_SB_FEATURE_RO_ATTR(lost_found, LOST_FOUND);
1279 F2FS_SB_FEATURE_RO_ATTR(verity, VERITY);
1280 F2FS_SB_FEATURE_RO_ATTR(sb_checksum, SB_CHKSUM);
1281 F2FS_SB_FEATURE_RO_ATTR(casefold, CASEFOLD);
1282 F2FS_SB_FEATURE_RO_ATTR(compression, COMPRESSION);
1283 F2FS_SB_FEATURE_RO_ATTR(readonly, RO);
1284
1285 static struct attribute *f2fs_sb_feat_attrs[] = {
1286         ATTR_LIST(sb_encryption),
1287         ATTR_LIST(sb_block_zoned),
1288         ATTR_LIST(sb_extra_attr),
1289         ATTR_LIST(sb_project_quota),
1290         ATTR_LIST(sb_inode_checksum),
1291         ATTR_LIST(sb_flexible_inline_xattr),
1292         ATTR_LIST(sb_quota_ino),
1293         ATTR_LIST(sb_inode_crtime),
1294         ATTR_LIST(sb_lost_found),
1295         ATTR_LIST(sb_verity),
1296         ATTR_LIST(sb_sb_checksum),
1297         ATTR_LIST(sb_casefold),
1298         ATTR_LIST(sb_compression),
1299         ATTR_LIST(sb_readonly),
1300         NULL,
1301 };
1302 ATTRIBUTE_GROUPS(f2fs_sb_feat);
1303
1304 static const struct sysfs_ops f2fs_attr_ops = {
1305         .show   = f2fs_attr_show,
1306         .store  = f2fs_attr_store,
1307 };
1308
1309 static const struct kobj_type f2fs_sb_ktype = {
1310         .default_groups = f2fs_groups,
1311         .sysfs_ops      = &f2fs_attr_ops,
1312         .release        = f2fs_sb_release,
1313 };
1314
1315 static const struct kobj_type f2fs_ktype = {
1316         .sysfs_ops      = &f2fs_attr_ops,
1317 };
1318
1319 static struct kset f2fs_kset = {
1320         .kobj   = {.ktype = &f2fs_ktype},
1321 };
1322
1323 static const struct kobj_type f2fs_feat_ktype = {
1324         .default_groups = f2fs_feat_groups,
1325         .sysfs_ops      = &f2fs_attr_ops,
1326 };
1327
1328 static struct kobject f2fs_feat = {
1329         .kset   = &f2fs_kset,
1330 };
1331
1332 static ssize_t f2fs_stat_attr_show(struct kobject *kobj,
1333                                 struct attribute *attr, char *buf)
1334 {
1335         struct f2fs_sb_info *sbi = container_of(kobj, struct f2fs_sb_info,
1336                                                                 s_stat_kobj);
1337         struct f2fs_attr *a = container_of(attr, struct f2fs_attr, attr);
1338
1339         return a->show ? a->show(a, sbi, buf) : 0;
1340 }
1341
1342 static ssize_t f2fs_stat_attr_store(struct kobject *kobj, struct attribute *attr,
1343                                                 const char *buf, size_t len)
1344 {
1345         struct f2fs_sb_info *sbi = container_of(kobj, struct f2fs_sb_info,
1346                                                                 s_stat_kobj);
1347         struct f2fs_attr *a = container_of(attr, struct f2fs_attr, attr);
1348
1349         return a->store ? a->store(a, sbi, buf, len) : 0;
1350 }
1351
1352 static void f2fs_stat_kobj_release(struct kobject *kobj)
1353 {
1354         struct f2fs_sb_info *sbi = container_of(kobj, struct f2fs_sb_info,
1355                                                                 s_stat_kobj);
1356         complete(&sbi->s_stat_kobj_unregister);
1357 }
1358
1359 static const struct sysfs_ops f2fs_stat_attr_ops = {
1360         .show   = f2fs_stat_attr_show,
1361         .store  = f2fs_stat_attr_store,
1362 };
1363
1364 static const struct kobj_type f2fs_stat_ktype = {
1365         .default_groups = f2fs_stat_groups,
1366         .sysfs_ops      = &f2fs_stat_attr_ops,
1367         .release        = f2fs_stat_kobj_release,
1368 };
1369
1370 static ssize_t f2fs_sb_feat_attr_show(struct kobject *kobj,
1371                                 struct attribute *attr, char *buf)
1372 {
1373         struct f2fs_sb_info *sbi = container_of(kobj, struct f2fs_sb_info,
1374                                                         s_feature_list_kobj);
1375         struct f2fs_attr *a = container_of(attr, struct f2fs_attr, attr);
1376
1377         return a->show ? a->show(a, sbi, buf) : 0;
1378 }
1379
1380 static void f2fs_feature_list_kobj_release(struct kobject *kobj)
1381 {
1382         struct f2fs_sb_info *sbi = container_of(kobj, struct f2fs_sb_info,
1383                                                         s_feature_list_kobj);
1384         complete(&sbi->s_feature_list_kobj_unregister);
1385 }
1386
1387 static const struct sysfs_ops f2fs_feature_list_attr_ops = {
1388         .show   = f2fs_sb_feat_attr_show,
1389 };
1390
1391 static const struct kobj_type f2fs_feature_list_ktype = {
1392         .default_groups = f2fs_sb_feat_groups,
1393         .sysfs_ops      = &f2fs_feature_list_attr_ops,
1394         .release        = f2fs_feature_list_kobj_release,
1395 };
1396
1397 static int __maybe_unused segment_info_seq_show(struct seq_file *seq,
1398                                                 void *offset)
1399 {
1400         struct super_block *sb = seq->private;
1401         struct f2fs_sb_info *sbi = F2FS_SB(sb);
1402         unsigned int total_segs =
1403                         le32_to_cpu(sbi->raw_super->segment_count_main);
1404         int i;
1405
1406         seq_puts(seq, "format: segment_type|valid_blocks\n"
1407                 "segment_type(0:HD, 1:WD, 2:CD, 3:HN, 4:WN, 5:CN)\n");
1408
1409         for (i = 0; i < total_segs; i++) {
1410                 struct seg_entry *se = get_seg_entry(sbi, i);
1411
1412                 if ((i % 10) == 0)
1413                         seq_printf(seq, "%-10d", i);
1414                 seq_printf(seq, "%d|%-3u", se->type, se->valid_blocks);
1415                 if ((i % 10) == 9 || i == (total_segs - 1))
1416                         seq_putc(seq, '\n');
1417                 else
1418                         seq_putc(seq, ' ');
1419         }
1420
1421         return 0;
1422 }
1423
1424 static int __maybe_unused segment_bits_seq_show(struct seq_file *seq,
1425                                                 void *offset)
1426 {
1427         struct super_block *sb = seq->private;
1428         struct f2fs_sb_info *sbi = F2FS_SB(sb);
1429         unsigned int total_segs =
1430                         le32_to_cpu(sbi->raw_super->segment_count_main);
1431         int i, j;
1432
1433         seq_puts(seq, "format: segment_type|valid_blocks|bitmaps\n"
1434                 "segment_type(0:HD, 1:WD, 2:CD, 3:HN, 4:WN, 5:CN)\n");
1435
1436         for (i = 0; i < total_segs; i++) {
1437                 struct seg_entry *se = get_seg_entry(sbi, i);
1438
1439                 seq_printf(seq, "%-10d", i);
1440                 seq_printf(seq, "%d|%-3u|", se->type, se->valid_blocks);
1441                 for (j = 0; j < SIT_VBLOCK_MAP_SIZE; j++)
1442                         seq_printf(seq, " %.2x", se->cur_valid_map[j]);
1443                 seq_putc(seq, '\n');
1444         }
1445         return 0;
1446 }
1447
1448 static int __maybe_unused victim_bits_seq_show(struct seq_file *seq,
1449                                                 void *offset)
1450 {
1451         struct super_block *sb = seq->private;
1452         struct f2fs_sb_info *sbi = F2FS_SB(sb);
1453         struct dirty_seglist_info *dirty_i = DIRTY_I(sbi);
1454         int i;
1455
1456         seq_puts(seq, "format: victim_secmap bitmaps\n");
1457
1458         for (i = 0; i < MAIN_SECS(sbi); i++) {
1459                 if ((i % 10) == 0)
1460                         seq_printf(seq, "%-10d", i);
1461                 seq_printf(seq, "%d", test_bit(i, dirty_i->victim_secmap) ? 1 : 0);
1462                 if ((i % 10) == 9 || i == (MAIN_SECS(sbi) - 1))
1463                         seq_putc(seq, '\n');
1464                 else
1465                         seq_putc(seq, ' ');
1466         }
1467         return 0;
1468 }
1469
1470 static int __maybe_unused discard_plist_seq_show(struct seq_file *seq,
1471                                                 void *offset)
1472 {
1473         struct super_block *sb = seq->private;
1474         struct f2fs_sb_info *sbi = F2FS_SB(sb);
1475         struct discard_cmd_control *dcc = SM_I(sbi)->dcc_info;
1476         int i, count;
1477
1478         seq_puts(seq, "Discard pend list(Show diacrd_cmd count on each entry, .:not exist):\n");
1479         if (!f2fs_realtime_discard_enable(sbi))
1480                 return 0;
1481
1482         if (dcc) {
1483                 mutex_lock(&dcc->cmd_lock);
1484                 for (i = 0; i < MAX_PLIST_NUM; i++) {
1485                         struct list_head *pend_list;
1486                         struct discard_cmd *dc, *tmp;
1487
1488                         if (i % 8 == 0)
1489                                 seq_printf(seq, "  %-3d", i);
1490                         count = 0;
1491                         pend_list = &dcc->pend_list[i];
1492                         list_for_each_entry_safe(dc, tmp, pend_list, list)
1493                                 count++;
1494                         if (count)
1495                                 seq_printf(seq, " %7d", count);
1496                         else
1497                                 seq_puts(seq, "       .");
1498                         if (i % 8 == 7)
1499                                 seq_putc(seq, '\n');
1500                 }
1501                 seq_putc(seq, '\n');
1502                 mutex_unlock(&dcc->cmd_lock);
1503         }
1504
1505         return 0;
1506 }
1507
1508 static int __maybe_unused disk_map_seq_show(struct seq_file *seq,
1509                                                 void *offset)
1510 {
1511         struct super_block *sb = seq->private;
1512         struct f2fs_sb_info *sbi = F2FS_SB(sb);
1513         int i;
1514
1515         seq_printf(seq, "Address Layout   : %5luB Block address (# of Segments)\n",
1516                                         F2FS_BLKSIZE);
1517         seq_printf(seq, " SB            : %12s\n", "0/1024B");
1518         seq_printf(seq, " seg0_blkaddr  : 0x%010x\n", SEG0_BLKADDR(sbi));
1519         seq_printf(seq, " Checkpoint    : 0x%010x (%10d)\n",
1520                         le32_to_cpu(F2FS_RAW_SUPER(sbi)->cp_blkaddr), 2);
1521         seq_printf(seq, " SIT           : 0x%010x (%10d)\n",
1522                         SIT_I(sbi)->sit_base_addr,
1523                         le32_to_cpu(F2FS_RAW_SUPER(sbi)->segment_count_sit));
1524         seq_printf(seq, " NAT           : 0x%010x (%10d)\n",
1525                         NM_I(sbi)->nat_blkaddr,
1526                         le32_to_cpu(F2FS_RAW_SUPER(sbi)->segment_count_nat));
1527         seq_printf(seq, " SSA           : 0x%010x (%10d)\n",
1528                         SM_I(sbi)->ssa_blkaddr,
1529                         le32_to_cpu(F2FS_RAW_SUPER(sbi)->segment_count_ssa));
1530         seq_printf(seq, " Main          : 0x%010x (%10d)\n",
1531                         SM_I(sbi)->main_blkaddr,
1532                         le32_to_cpu(F2FS_RAW_SUPER(sbi)->segment_count_main));
1533         seq_printf(seq, " # of Sections : %12d\n",
1534                         le32_to_cpu(F2FS_RAW_SUPER(sbi)->section_count));
1535         seq_printf(seq, " Segs/Sections : %12d\n",
1536                         SEGS_PER_SEC(sbi));
1537         seq_printf(seq, " Section size  : %12d MB\n",
1538                         SEGS_PER_SEC(sbi) << 1);
1539
1540         if (!f2fs_is_multi_device(sbi))
1541                 return 0;
1542
1543         seq_puts(seq, "\nDisk Map for multi devices:\n");
1544         for (i = 0; i < sbi->s_ndevs; i++)
1545                 seq_printf(seq, "Disk:%2d (zoned=%d): 0x%010x - 0x%010x on %s\n",
1546                         i, bdev_is_zoned(FDEV(i).bdev),
1547                         FDEV(i).start_blk, FDEV(i).end_blk,
1548                         FDEV(i).path);
1549         return 0;
1550 }
1551
1552 int __init f2fs_init_sysfs(void)
1553 {
1554         int ret;
1555
1556         kobject_set_name(&f2fs_kset.kobj, "f2fs");
1557         f2fs_kset.kobj.parent = fs_kobj;
1558         ret = kset_register(&f2fs_kset);
1559         if (ret)
1560                 return ret;
1561
1562         ret = kobject_init_and_add(&f2fs_feat, &f2fs_feat_ktype,
1563                                    NULL, "features");
1564         if (ret)
1565                 goto put_kobject;
1566
1567         f2fs_proc_root = proc_mkdir("fs/f2fs", NULL);
1568         if (!f2fs_proc_root) {
1569                 ret = -ENOMEM;
1570                 goto put_kobject;
1571         }
1572
1573         return 0;
1574 put_kobject:
1575         kobject_put(&f2fs_feat);
1576         kset_unregister(&f2fs_kset);
1577         return ret;
1578 }
1579
1580 void f2fs_exit_sysfs(void)
1581 {
1582         kobject_put(&f2fs_feat);
1583         kset_unregister(&f2fs_kset);
1584         remove_proc_entry("fs/f2fs", NULL);
1585         f2fs_proc_root = NULL;
1586 }
1587
1588 int f2fs_register_sysfs(struct f2fs_sb_info *sbi)
1589 {
1590         struct super_block *sb = sbi->sb;
1591         int err;
1592
1593         sbi->s_kobj.kset = &f2fs_kset;
1594         init_completion(&sbi->s_kobj_unregister);
1595         err = kobject_init_and_add(&sbi->s_kobj, &f2fs_sb_ktype, NULL,
1596                                 "%s", sb->s_id);
1597         if (err)
1598                 goto put_sb_kobj;
1599
1600         sbi->s_stat_kobj.kset = &f2fs_kset;
1601         init_completion(&sbi->s_stat_kobj_unregister);
1602         err = kobject_init_and_add(&sbi->s_stat_kobj, &f2fs_stat_ktype,
1603                                                 &sbi->s_kobj, "stat");
1604         if (err)
1605                 goto put_stat_kobj;
1606
1607         sbi->s_feature_list_kobj.kset = &f2fs_kset;
1608         init_completion(&sbi->s_feature_list_kobj_unregister);
1609         err = kobject_init_and_add(&sbi->s_feature_list_kobj,
1610                                         &f2fs_feature_list_ktype,
1611                                         &sbi->s_kobj, "feature_list");
1612         if (err)
1613                 goto put_feature_list_kobj;
1614
1615         sbi->s_proc = proc_mkdir(sb->s_id, f2fs_proc_root);
1616         if (!sbi->s_proc) {
1617                 err = -ENOMEM;
1618                 goto put_feature_list_kobj;
1619         }
1620
1621         proc_create_single_data("segment_info", 0444, sbi->s_proc,
1622                                 segment_info_seq_show, sb);
1623         proc_create_single_data("segment_bits", 0444, sbi->s_proc,
1624                                 segment_bits_seq_show, sb);
1625 #ifdef CONFIG_F2FS_IOSTAT
1626         proc_create_single_data("iostat_info", 0444, sbi->s_proc,
1627                                 iostat_info_seq_show, sb);
1628 #endif
1629         proc_create_single_data("victim_bits", 0444, sbi->s_proc,
1630                                 victim_bits_seq_show, sb);
1631         proc_create_single_data("discard_plist_info", 0444, sbi->s_proc,
1632                                 discard_plist_seq_show, sb);
1633         proc_create_single_data("disk_map", 0444, sbi->s_proc,
1634                                 disk_map_seq_show, sb);
1635         return 0;
1636 put_feature_list_kobj:
1637         kobject_put(&sbi->s_feature_list_kobj);
1638         wait_for_completion(&sbi->s_feature_list_kobj_unregister);
1639 put_stat_kobj:
1640         kobject_put(&sbi->s_stat_kobj);
1641         wait_for_completion(&sbi->s_stat_kobj_unregister);
1642 put_sb_kobj:
1643         kobject_put(&sbi->s_kobj);
1644         wait_for_completion(&sbi->s_kobj_unregister);
1645         return err;
1646 }
1647
1648 void f2fs_unregister_sysfs(struct f2fs_sb_info *sbi)
1649 {
1650         remove_proc_subtree(sbi->sb->s_id, f2fs_proc_root);
1651
1652         kobject_put(&sbi->s_stat_kobj);
1653         wait_for_completion(&sbi->s_stat_kobj_unregister);
1654         kobject_put(&sbi->s_feature_list_kobj);
1655         wait_for_completion(&sbi->s_feature_list_kobj_unregister);
1656
1657         kobject_put(&sbi->s_kobj);
1658         wait_for_completion(&sbi->s_kobj_unregister);
1659 }