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 #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 *, struct f2fs_sb_info *, char *);
  57         ssize_t (*store)(struct f2fs_attr *, struct f2fs_sb_info *,
  58                          const char *, size_t);
  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 sprintf(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 sprintf(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 sprintf(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 sprintf(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 sprintf(buf, "%lx\n", sbi->s_flag);
 129 }
 130
 131 static ssize_t pending_discard_show(struct f2fs_attr *a,
 132                 struct f2fs_sb_info *sbi, char *buf)
 133 {
 134         if (!SM_I(sbi)->dcc_info)
 135                 return -EINVAL;
 136         return sprintf(buf, "%llu\n", (unsigned long long)atomic_read(
 137                                 &SM_I(sbi)->dcc_info->discard_cmd_cnt));
 138 }
 139
 140 static ssize_t features_show(struct f2fs_attr *a,
 141                 struct f2fs_sb_info *sbi, char *buf)
 142 {
 143         int len = 0;
 144
 145         if (f2fs_sb_has_encrypt(sbi))
 146                 len += scnprintf(buf, PAGE_SIZE - len, "%s",
 147                                                 "encryption");
 148         if (f2fs_sb_has_blkzoned(sbi))
 149                 len += scnprintf(buf + len, PAGE_SIZE - len, "%s%s",
 150                                 len ? ", " : "", "blkzoned");
 151         if (f2fs_sb_has_extra_attr(sbi))
 152                 len += scnprintf(buf + len, PAGE_SIZE - len, "%s%s",
 153                                 len ? ", " : "", "extra_attr");
 154         if (f2fs_sb_has_project_quota(sbi))
 155                 len += scnprintf(buf + len, PAGE_SIZE - len, "%s%s",
 156                                 len ? ", " : "", "projquota");
 157         if (f2fs_sb_has_inode_chksum(sbi))
 158                 len += scnprintf(buf + len, PAGE_SIZE - len, "%s%s",
 159                                 len ? ", " : "", "inode_checksum");
 160         if (f2fs_sb_has_flexible_inline_xattr(sbi))
 161                 len += scnprintf(buf + len, PAGE_SIZE - len, "%s%s",
 162                                 len ? ", " : "", "flexible_inline_xattr");
 163         if (f2fs_sb_has_quota_ino(sbi))
 164                 len += scnprintf(buf + len, PAGE_SIZE - len, "%s%s",
 165                                 len ? ", " : "", "quota_ino");
 166         if (f2fs_sb_has_inode_crtime(sbi))
 167                 len += scnprintf(buf + len, PAGE_SIZE - len, "%s%s",
 168                                 len ? ", " : "", "inode_crtime");
 169         if (f2fs_sb_has_lost_found(sbi))
 170                 len += scnprintf(buf + len, PAGE_SIZE - len, "%s%s",
 171                                 len ? ", " : "", "lost_found");
 172         if (f2fs_sb_has_verity(sbi))
 173                 len += scnprintf(buf + len, PAGE_SIZE - len, "%s%s",
 174                                 len ? ", " : "", "verity");
 175         if (f2fs_sb_has_sb_chksum(sbi))
 176                 len += scnprintf(buf + len, PAGE_SIZE - len, "%s%s",
 177                                 len ? ", " : "", "sb_checksum");
 178         if (f2fs_sb_has_casefold(sbi))
 179                 len += scnprintf(buf + len, PAGE_SIZE - len, "%s%s",
 180                                 len ? ", " : "", "casefold");
 181         if (f2fs_sb_has_readonly(sbi))
 182                 len += scnprintf(buf + len, PAGE_SIZE - len, "%s%s",
 183                                 len ? ", " : "", "readonly");
 184         if (f2fs_sb_has_compression(sbi))
 185                 len += scnprintf(buf + len, PAGE_SIZE - len, "%s%s",
 186                                 len ? ", " : "", "compression");
 187         len += scnprintf(buf + len, PAGE_SIZE - len, "%s%s",
 188                                 len ? ", " : "", "pin_file");
 189         len += scnprintf(buf + len, PAGE_SIZE - len, "\n");
 190         return len;
 191 }
 192
 193 static ssize_t current_reserved_blocks_show(struct f2fs_attr *a,
 194                                         struct f2fs_sb_info *sbi, char *buf)
 195 {
 196         return sprintf(buf, "%u\n", sbi->current_reserved_blocks);
 197 }
 198
 199 static ssize_t unusable_show(struct f2fs_attr *a,
 200                 struct f2fs_sb_info *sbi, char *buf)
 201 {
 202         block_t unusable;
 203
 204         if (test_opt(sbi, DISABLE_CHECKPOINT))
 205                 unusable = sbi->unusable_block_count;
 206         else
 207                 unusable = f2fs_get_unusable_blocks(sbi);
 208         return sprintf(buf, "%llu\n", (unsigned long long)unusable);
 209 }
 210
 211 static ssize_t encoding_show(struct f2fs_attr *a,
 212                 struct f2fs_sb_info *sbi, char *buf)
 213 {
 214 #if IS_ENABLED(CONFIG_UNICODE)
 215         struct super_block *sb = sbi->sb;
 216
 217         if (f2fs_sb_has_casefold(sbi))
 218                 return sysfs_emit(buf, "UTF-8 (%d.%d.%d)\n",
 219                         (sb->s_encoding->version >> 16) & 0xff,
 220                         (sb->s_encoding->version >> 8) & 0xff,
 221                         sb->s_encoding->version & 0xff);
 222 #endif
 223         return sprintf(buf, "(none)");
 224 }
 225
 226 static ssize_t mounted_time_sec_show(struct f2fs_attr *a,
 227                 struct f2fs_sb_info *sbi, char *buf)
 228 {
 229         return sprintf(buf, "%llu", SIT_I(sbi)->mounted_time);
 230 }
 231
 232 #ifdef CONFIG_F2FS_STAT_FS
 233 static ssize_t moved_blocks_foreground_show(struct f2fs_attr *a,
 234                                 struct f2fs_sb_info *sbi, char *buf)
 235 {
 236         struct f2fs_stat_info *si = F2FS_STAT(sbi);
 237
 238         return sprintf(buf, "%llu\n",
 239                 (unsigned long long)(si->tot_blks -
 240                         (si->bg_data_blks + si->bg_node_blks)));
 241 }
 242
 243 static ssize_t moved_blocks_background_show(struct f2fs_attr *a,
 244                                 struct f2fs_sb_info *sbi, char *buf)
 245 {
 246         struct f2fs_stat_info *si = F2FS_STAT(sbi);
 247
 248         return sprintf(buf, "%llu\n",
 249                 (unsigned long long)(si->bg_data_blks + si->bg_node_blks));
 250 }
 251
 252 static ssize_t avg_vblocks_show(struct f2fs_attr *a,
 253                 struct f2fs_sb_info *sbi, char *buf)
 254 {
 255         struct f2fs_stat_info *si = F2FS_STAT(sbi);
 256
 257         si->dirty_count = dirty_segments(sbi);
 258         f2fs_update_sit_info(sbi);
 259         return sprintf(buf, "%llu\n", (unsigned long long)(si->avg_vblocks));
 260 }
 261 #endif
 262
 263 static ssize_t main_blkaddr_show(struct f2fs_attr *a,
 264                                 struct f2fs_sb_info *sbi, char *buf)
 265 {
 266         return sysfs_emit(buf, "%llu\n",
 267                         (unsigned long long)MAIN_BLKADDR(sbi));
 268 }
 269
 270 static ssize_t f2fs_sbi_show(struct f2fs_attr *a,
 271                         struct f2fs_sb_info *sbi, char *buf)
 272 {
 273         unsigned char *ptr = NULL;
 274         unsigned int *ui;
 275
 276         ptr = __struct_ptr(sbi, a->struct_type);
 277         if (!ptr)
 278                 return -EINVAL;
 279
 280         if (!strcmp(a->attr.name, "extension_list")) {
 281                 __u8 (*extlist)[F2FS_EXTENSION_LEN] =
 282                                         sbi->raw_super->extension_list;
 283                 int cold_count = le32_to_cpu(sbi->raw_super->extension_count);
 284                 int hot_count = sbi->raw_super->hot_ext_count;
 285                 int len = 0, i;
 286
 287                 len += scnprintf(buf + len, PAGE_SIZE - len,
 288                                                 "cold file extension:\n");
 289                 for (i = 0; i < cold_count; i++)
 290                         len += scnprintf(buf + len, PAGE_SIZE - len, "%s\n",
 291                                                                 extlist[i]);
 292
 293                 len += scnprintf(buf + len, PAGE_SIZE - len,
 294                                                 "hot file extension:\n");
 295                 for (i = cold_count; i < cold_count + hot_count; i++)
 296                         len += scnprintf(buf + len, PAGE_SIZE - len, "%s\n",
 297                                                                 extlist[i]);
 298                 return len;
 299         }
 300
 301         if (!strcmp(a->attr.name, "ckpt_thread_ioprio")) {
 302                 struct ckpt_req_control *cprc = &sbi->cprc_info;
 303                 int len = 0;
 304                 int class = IOPRIO_PRIO_CLASS(cprc->ckpt_thread_ioprio);
 305                 int data = IOPRIO_PRIO_DATA(cprc->ckpt_thread_ioprio);
 306
 307                 if (class == IOPRIO_CLASS_RT)
 308                         len += scnprintf(buf + len, PAGE_SIZE - len, "rt,");
 309                 else if (class == IOPRIO_CLASS_BE)
 310                         len += scnprintf(buf + len, PAGE_SIZE - len, "be,");
 311                 else
 312                         return -EINVAL;
 313
 314                 len += scnprintf(buf + len, PAGE_SIZE - len, "%d\n", data);
 315                 return len;
 316         }
 317
 318 #ifdef CONFIG_F2FS_FS_COMPRESSION
 319         if (!strcmp(a->attr.name, "compr_written_block"))
 320                 return sysfs_emit(buf, "%llu\n", sbi->compr_written_block);
 321
 322         if (!strcmp(a->attr.name, "compr_saved_block"))
 323                 return sysfs_emit(buf, "%llu\n", sbi->compr_saved_block);
 324
 325         if (!strcmp(a->attr.name, "compr_new_inode"))
 326                 return sysfs_emit(buf, "%u\n", sbi->compr_new_inode);
 327 #endif
 328
 329         if (!strcmp(a->attr.name, "gc_urgent"))
 330                 return sysfs_emit(buf, "%s\n",
 331                                 gc_mode_names[sbi->gc_mode]);
 332
 333         if (!strcmp(a->attr.name, "gc_segment_mode"))
 334                 return sysfs_emit(buf, "%s\n",
 335                                 gc_mode_names[sbi->gc_segment_mode]);
 336
 337         if (!strcmp(a->attr.name, "gc_reclaimed_segments")) {
 338                 return sysfs_emit(buf, "%u\n",
 339                         sbi->gc_reclaimed_segs[sbi->gc_segment_mode]);
 340         }
 341
 342         if (!strcmp(a->attr.name, "current_atomic_write")) {
 343                 s64 current_write = atomic64_read(&sbi->current_atomic_write);
 344
 345                 return sysfs_emit(buf, "%lld\n", current_write);
 346         }
 347
 348         if (!strcmp(a->attr.name, "peak_atomic_write"))
 349                 return sysfs_emit(buf, "%lld\n", sbi->peak_atomic_write);
 350
 351         if (!strcmp(a->attr.name, "committed_atomic_block"))
 352                 return sysfs_emit(buf, "%llu\n", sbi->committed_atomic_block);
 353
 354         if (!strcmp(a->attr.name, "revoked_atomic_block"))
 355                 return sysfs_emit(buf, "%llu\n", sbi->revoked_atomic_block);
 356
 357         ui = (unsigned int *)(ptr + a->offset);
 358
 359         return sprintf(buf, "%u\n", *ui);
 360 }
 361
 362 static ssize_t __sbi_store(struct f2fs_attr *a,
 363                         struct f2fs_sb_info *sbi,
 364                         const char *buf, size_t count)
 365 {
 366         unsigned char *ptr;
 367         unsigned long t;
 368         unsigned int *ui;
 369         ssize_t ret;
 370
 371         ptr = __struct_ptr(sbi, a->struct_type);
 372         if (!ptr)
 373                 return -EINVAL;
 374
 375         if (!strcmp(a->attr.name, "extension_list")) {
 376                 const char *name = strim((char *)buf);
 377                 bool set = true, hot;
 378
 379                 if (!strncmp(name, "[h]", 3))
 380                         hot = true;
 381                 else if (!strncmp(name, "[c]", 3))
 382                         hot = false;
 383                 else
 384                         return -EINVAL;
 385
 386                 name += 3;
 387
 388                 if (*name == '!') {
 389                         name++;
 390                         set = false;
 391                 }
 392
 393                 if (!strlen(name) || strlen(name) >= F2FS_EXTENSION_LEN)
 394                         return -EINVAL;
 395
 396                 f2fs_down_write(&sbi->sb_lock);
 397
 398                 ret = f2fs_update_extension_list(sbi, name, hot, set);
 399                 if (ret)
 400                         goto out;
 401
 402                 ret = f2fs_commit_super(sbi, false);
 403                 if (ret)
 404                         f2fs_update_extension_list(sbi, name, hot, !set);
 405 out:
 406                 f2fs_up_write(&sbi->sb_lock);
 407                 return ret ? ret : count;
 408         }
 409
 410         if (!strcmp(a->attr.name, "ckpt_thread_ioprio")) {
 411                 const char *name = strim((char *)buf);
 412                 struct ckpt_req_control *cprc = &sbi->cprc_info;
 413                 int class;
 414                 long data;
 415                 int ret;
 416
 417                 if (!strncmp(name, "rt,", 3))
 418                         class = IOPRIO_CLASS_RT;
 419                 else if (!strncmp(name, "be,", 3))
 420                         class = IOPRIO_CLASS_BE;
 421                 else
 422                         return -EINVAL;
 423
 424                 name += 3;
 425                 ret = kstrtol(name, 10, &data);
 426                 if (ret)
 427                         return ret;
 428                 if (data >= IOPRIO_NR_LEVELS || data < 0)
 429                         return -EINVAL;
 430
 431                 cprc->ckpt_thread_ioprio = IOPRIO_PRIO_VALUE(class, data);
 432                 if (test_opt(sbi, MERGE_CHECKPOINT)) {
 433                         ret = set_task_ioprio(cprc->f2fs_issue_ckpt,
 434                                         cprc->ckpt_thread_ioprio);
 435                         if (ret)
 436                                 return ret;
 437                 }
 438
 439                 return count;
 440         }
 441
 442         ui = (unsigned int *)(ptr + a->offset);
 443
 444         ret = kstrtoul(skip_spaces(buf), 0, &t);
 445         if (ret < 0)
 446                 return ret;
 447 #ifdef CONFIG_F2FS_FAULT_INJECTION
 448         if (a->struct_type == FAULT_INFO_TYPE && t >= (1 << FAULT_MAX))
 449                 return -EINVAL;
 450         if (a->struct_type == FAULT_INFO_RATE && t >= UINT_MAX)
 451                 return -EINVAL;
 452 #endif
 453         if (a->struct_type == RESERVED_BLOCKS) {
 454                 spin_lock(&sbi->stat_lock);
 455                 if (t > (unsigned long)(sbi->user_block_count -
 456                                 F2FS_OPTION(sbi).root_reserved_blocks -
 457                                 sbi->blocks_per_seg *
 458                                 SM_I(sbi)->additional_reserved_segments)) {
 459                         spin_unlock(&sbi->stat_lock);
 460                         return -EINVAL;
 461                 }
 462                 *ui = t;
 463                 sbi->current_reserved_blocks = min(sbi->reserved_blocks,
 464                                 sbi->user_block_count - valid_user_blocks(sbi));
 465                 spin_unlock(&sbi->stat_lock);
 466                 return count;
 467         }
 468
 469         if (!strcmp(a->attr.name, "discard_granularity")) {
 470                 if (t == 0 || t > MAX_PLIST_NUM)
 471                         return -EINVAL;
 472                 if (!f2fs_block_unit_discard(sbi))
 473                         return -EINVAL;
 474                 if (t == *ui)
 475                         return count;
 476                 *ui = t;
 477                 return count;
 478         }
 479
 480         if (!strcmp(a->attr.name, "migration_granularity")) {
 481                 if (t == 0 || t > sbi->segs_per_sec)
 482                         return -EINVAL;
 483         }
 484
 485         if (!strcmp(a->attr.name, "trim_sections"))
 486                 return -EINVAL;
 487
 488         if (!strcmp(a->attr.name, "gc_urgent")) {
 489                 if (t == 0) {
 490                         sbi->gc_mode = GC_NORMAL;
 491                 } else if (t == 1) {
 492                         sbi->gc_mode = GC_URGENT_HIGH;
 493                         if (sbi->gc_thread) {
 494                                 sbi->gc_thread->gc_wake = 1;
 495                                 wake_up_interruptible_all(
 496                                         &sbi->gc_thread->gc_wait_queue_head);
 497                                 wake_up_discard_thread(sbi, true);
 498                         }
 499                 } else if (t == 2) {
 500                         sbi->gc_mode = GC_URGENT_LOW;
 501                 } else if (t == 3) {
 502                         sbi->gc_mode = GC_URGENT_MID;
 503                         if (sbi->gc_thread) {
 504                                 sbi->gc_thread->gc_wake = 1;
 505                                 wake_up_interruptible_all(
 506                                         &sbi->gc_thread->gc_wait_queue_head);
 507                         }
 508                 } else {
 509                         return -EINVAL;
 510                 }
 511                 return count;
 512         }
 513         if (!strcmp(a->attr.name, "gc_idle")) {
 514                 if (t == GC_IDLE_CB) {
 515                         sbi->gc_mode = GC_IDLE_CB;
 516                 } else if (t == GC_IDLE_GREEDY) {
 517                         sbi->gc_mode = GC_IDLE_GREEDY;
 518                 } else if (t == GC_IDLE_AT) {
 519                         if (!sbi->am.atgc_enabled)
 520                                 return -EINVAL;
 521                         sbi->gc_mode = GC_IDLE_AT;
 522                 } else {
 523                         sbi->gc_mode = GC_NORMAL;
 524                 }
 525                 return count;
 526         }
 527
 528         if (!strcmp(a->attr.name, "gc_urgent_high_remaining")) {
 529                 spin_lock(&sbi->gc_urgent_high_lock);
 530                 sbi->gc_urgent_high_limited = t != 0;
 531                 sbi->gc_urgent_high_remaining = t;
 532                 spin_unlock(&sbi->gc_urgent_high_lock);
 533
 534                 return count;
 535         }
 536
 537 #ifdef CONFIG_F2FS_IOSTAT
 538         if (!strcmp(a->attr.name, "iostat_enable")) {
 539                 sbi->iostat_enable = !!t;
 540                 if (!sbi->iostat_enable)
 541                         f2fs_reset_iostat(sbi);
 542                 return count;
 543         }
 544
 545         if (!strcmp(a->attr.name, "iostat_period_ms")) {
 546                 if (t < MIN_IOSTAT_PERIOD_MS || t > MAX_IOSTAT_PERIOD_MS)
 547                         return -EINVAL;
 548                 spin_lock(&sbi->iostat_lock);
 549                 sbi->iostat_period_ms = (unsigned int)t;
 550                 spin_unlock(&sbi->iostat_lock);
 551                 return count;
 552         }
 553 #endif
 554
 555 #ifdef CONFIG_F2FS_FS_COMPRESSION
 556         if (!strcmp(a->attr.name, "compr_written_block") ||
 557                 !strcmp(a->attr.name, "compr_saved_block")) {
 558                 if (t != 0)
 559                         return -EINVAL;
 560                 sbi->compr_written_block = 0;
 561                 sbi->compr_saved_block = 0;
 562                 return count;
 563         }
 564
 565         if (!strcmp(a->attr.name, "compr_new_inode")) {
 566                 if (t != 0)
 567                         return -EINVAL;
 568                 sbi->compr_new_inode = 0;
 569                 return count;
 570         }
 571 #endif
 572
 573         if (!strcmp(a->attr.name, "atgc_candidate_ratio")) {
 574                 if (t > 100)
 575                         return -EINVAL;
 576                 sbi->am.candidate_ratio = t;
 577                 return count;
 578         }
 579
 580         if (!strcmp(a->attr.name, "atgc_age_weight")) {
 581                 if (t > 100)
 582                         return -EINVAL;
 583                 sbi->am.age_weight = t;
 584                 return count;
 585         }
 586
 587         if (!strcmp(a->attr.name, "gc_segment_mode")) {
 588                 if (t < MAX_GC_MODE)
 589                         sbi->gc_segment_mode = t;
 590                 else
 591                         return -EINVAL;
 592                 return count;
 593         }
 594
 595         if (!strcmp(a->attr.name, "gc_reclaimed_segments")) {
 596                 if (t != 0)
 597                         return -EINVAL;
 598                 sbi->gc_reclaimed_segs[sbi->gc_segment_mode] = 0;
 599                 return count;
 600         }
 601
 602         if (!strcmp(a->attr.name, "seq_file_ra_mul")) {
 603                 if (t >= MIN_RA_MUL && t <= MAX_RA_MUL)
 604                         sbi->seq_file_ra_mul = t;
 605                 else
 606                         return -EINVAL;
 607                 return count;
 608         }
 609
 610         if (!strcmp(a->attr.name, "max_fragment_chunk")) {
 611                 if (t >= MIN_FRAGMENT_SIZE && t <= MAX_FRAGMENT_SIZE)
 612                         sbi->max_fragment_chunk = t;
 613                 else
 614                         return -EINVAL;
 615                 return count;
 616         }
 617
 618         if (!strcmp(a->attr.name, "max_fragment_hole")) {
 619                 if (t >= MIN_FRAGMENT_SIZE && t <= MAX_FRAGMENT_SIZE)
 620                         sbi->max_fragment_hole = t;
 621                 else
 622                         return -EINVAL;
 623                 return count;
 624         }
 625
 626         if (!strcmp(a->attr.name, "peak_atomic_write")) {
 627                 if (t != 0)
 628                         return -EINVAL;
 629                 sbi->peak_atomic_write = 0;
 630                 return count;
 631         }
 632
 633         if (!strcmp(a->attr.name, "committed_atomic_block")) {
 634                 if (t != 0)
 635                         return -EINVAL;
 636                 sbi->committed_atomic_block = 0;
 637                 return count;
 638         }
 639
 640         if (!strcmp(a->attr.name, "revoked_atomic_block")) {
 641                 if (t != 0)
 642                         return -EINVAL;
 643                 sbi->revoked_atomic_block = 0;
 644                 return count;
 645         }
 646
 647         *ui = (unsigned int)t;
 648
 649         return count;
 650 }
 651
 652 static ssize_t f2fs_sbi_store(struct f2fs_attr *a,
 653                         struct f2fs_sb_info *sbi,
 654                         const char *buf, size_t count)
 655 {
 656         ssize_t ret;
 657         bool gc_entry = (!strcmp(a->attr.name, "gc_urgent") ||
 658                                         a->struct_type == GC_THREAD);
 659
 660         if (gc_entry) {
 661                 if (!down_read_trylock(&sbi->sb->s_umount))
 662                         return -EAGAIN;
 663         }
 664         ret = __sbi_store(a, sbi, buf, count);
 665         if (gc_entry)
 666                 up_read(&sbi->sb->s_umount);
 667
 668         return ret;
 669 }
 670
 671 static ssize_t f2fs_attr_show(struct kobject *kobj,
 672                                 struct attribute *attr, char *buf)
 673 {
 674         struct f2fs_sb_info *sbi = container_of(kobj, struct f2fs_sb_info,
 675                                                                 s_kobj);
 676         struct f2fs_attr *a = container_of(attr, struct f2fs_attr, attr);
 677
 678         return a->show ? a->show(a, sbi, buf) : 0;
 679 }
 680
 681 static ssize_t f2fs_attr_store(struct kobject *kobj, struct attribute *attr,
 682                                                 const char *buf, size_t len)
 683 {
 684         struct f2fs_sb_info *sbi = container_of(kobj, struct f2fs_sb_info,
 685                                                                         s_kobj);
 686         struct f2fs_attr *a = container_of(attr, struct f2fs_attr, attr);
 687
 688         return a->store ? a->store(a, sbi, buf, len) : 0;
 689 }
 690
 691 static void f2fs_sb_release(struct kobject *kobj)
 692 {
 693         struct f2fs_sb_info *sbi = container_of(kobj, struct f2fs_sb_info,
 694                                                                 s_kobj);
 695         complete(&sbi->s_kobj_unregister);
 696 }
 697
 698 /*
 699  * Note that there are three feature list entries:
 700  * 1) /sys/fs/f2fs/features
 701  *   : shows runtime features supported by in-kernel f2fs along with Kconfig.
 702  *     - ref. F2FS_FEATURE_RO_ATTR()
 703  *
 704  * 2) /sys/fs/f2fs/$s_id/features <deprecated>
 705  *   : shows on-disk features enabled by mkfs.f2fs, used for old kernels. This
 706  *     won't add new feature anymore, and thus, users should check entries in 3)
 707  *     instead of this 2).
 708  *
 709  * 3) /sys/fs/f2fs/$s_id/feature_list
 710  *   : shows on-disk features enabled by mkfs.f2fs per instance, which follows
 711  *     sysfs entry rule where each entry should expose single value.
 712  *     This list covers old feature list provided by 2) and beyond. Therefore,
 713  *     please add new on-disk feature in this list only.
 714  *     - ref. F2FS_SB_FEATURE_RO_ATTR()
 715  */
 716 static ssize_t f2fs_feature_show(struct f2fs_attr *a,
 717                 struct f2fs_sb_info *sbi, char *buf)
 718 {
 719         return sprintf(buf, "supported\n");
 720 }
 721
 722 #define F2FS_FEATURE_RO_ATTR(_name)                             \
 723 static struct f2fs_attr f2fs_attr_##_name = {                   \
 724         .attr = {.name = __stringify(_name), .mode = 0444 },    \
 725         .show   = f2fs_feature_show,                            \
 726 }
 727
 728 static ssize_t f2fs_sb_feature_show(struct f2fs_attr *a,
 729                 struct f2fs_sb_info *sbi, char *buf)
 730 {
 731         if (F2FS_HAS_FEATURE(sbi, a->id))
 732                 return sprintf(buf, "supported\n");
 733         return sprintf(buf, "unsupported\n");
 734 }
 735
 736 #define F2FS_SB_FEATURE_RO_ATTR(_name, _feat)                   \
 737 static struct f2fs_attr f2fs_attr_sb_##_name = {                \
 738         .attr = {.name = __stringify(_name), .mode = 0444 },    \
 739         .show   = f2fs_sb_feature_show,                         \
 740         .id     = F2FS_FEATURE_##_feat,                         \
 741 }
 742
 743 #define F2FS_ATTR_OFFSET(_struct_type, _name, _mode, _show, _store, _offset) \
 744 static struct f2fs_attr f2fs_attr_##_name = {                   \
 745         .attr = {.name = __stringify(_name), .mode = _mode },   \
 746         .show   = _show,                                        \
 747         .store  = _store,                                       \
 748         .struct_type = _struct_type,                            \
 749         .offset = _offset                                       \
 750 }
 751
 752 #define F2FS_RO_ATTR(struct_type, struct_name, name, elname)    \
 753         F2FS_ATTR_OFFSET(struct_type, name, 0444,               \
 754                 f2fs_sbi_show, NULL,                            \
 755                 offsetof(struct struct_name, elname))
 756
 757 #define F2FS_RW_ATTR(struct_type, struct_name, name, elname)    \
 758         F2FS_ATTR_OFFSET(struct_type, name, 0644,               \
 759                 f2fs_sbi_show, f2fs_sbi_store,                  \
 760                 offsetof(struct struct_name, elname))
 761
 762 #define F2FS_GENERAL_RO_ATTR(name) \
 763 static struct f2fs_attr f2fs_attr_##name = __ATTR(name, 0444, name##_show, NULL)
 764
 765 #define F2FS_STAT_ATTR(_struct_type, _struct_name, _name, _elname)      \
 766 static struct f2fs_attr f2fs_attr_##_name = {                   \
 767         .attr = {.name = __stringify(_name), .mode = 0444 },    \
 768         .show = f2fs_sbi_show,                                  \
 769         .struct_type = _struct_type,                            \
 770         .offset = offsetof(struct _struct_name, _elname),       \
 771 }
 772
 773 F2FS_RW_ATTR(GC_THREAD, f2fs_gc_kthread, gc_urgent_sleep_time,
 774                                                         urgent_sleep_time);
 775 F2FS_RW_ATTR(GC_THREAD, f2fs_gc_kthread, gc_min_sleep_time, min_sleep_time);
 776 F2FS_RW_ATTR(GC_THREAD, f2fs_gc_kthread, gc_max_sleep_time, max_sleep_time);
 777 F2FS_RW_ATTR(GC_THREAD, f2fs_gc_kthread, gc_no_gc_sleep_time, no_gc_sleep_time);
 778 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, gc_idle, gc_mode);
 779 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, gc_urgent, gc_mode);
 780 F2FS_RW_ATTR(SM_INFO, f2fs_sm_info, reclaim_segments, rec_prefree_segments);
 781 F2FS_RW_ATTR(DCC_INFO, discard_cmd_control, max_small_discards, max_discards);
 782 F2FS_RW_ATTR(DCC_INFO, discard_cmd_control, max_discard_request, max_discard_request);
 783 F2FS_RW_ATTR(DCC_INFO, discard_cmd_control, min_discard_issue_time, min_discard_issue_time);
 784 F2FS_RW_ATTR(DCC_INFO, discard_cmd_control, mid_discard_issue_time, mid_discard_issue_time);
 785 F2FS_RW_ATTR(DCC_INFO, discard_cmd_control, max_discard_issue_time, max_discard_issue_time);
 786 F2FS_RW_ATTR(DCC_INFO, discard_cmd_control, discard_granularity, discard_granularity);
 787 F2FS_RW_ATTR(RESERVED_BLOCKS, f2fs_sb_info, reserved_blocks, reserved_blocks);
 788 F2FS_RW_ATTR(SM_INFO, f2fs_sm_info, batched_trim_sections, trim_sections);
 789 F2FS_RW_ATTR(SM_INFO, f2fs_sm_info, ipu_policy, ipu_policy);
 790 F2FS_RW_ATTR(SM_INFO, f2fs_sm_info, min_ipu_util, min_ipu_util);
 791 F2FS_RW_ATTR(SM_INFO, f2fs_sm_info, min_fsync_blocks, min_fsync_blocks);
 792 F2FS_RW_ATTR(SM_INFO, f2fs_sm_info, min_seq_blocks, min_seq_blocks);
 793 F2FS_RW_ATTR(SM_INFO, f2fs_sm_info, min_hot_blocks, min_hot_blocks);
 794 F2FS_RW_ATTR(SM_INFO, f2fs_sm_info, min_ssr_sections, min_ssr_sections);
 795 F2FS_RW_ATTR(NM_INFO, f2fs_nm_info, ram_thresh, ram_thresh);
 796 F2FS_RW_ATTR(NM_INFO, f2fs_nm_info, ra_nid_pages, ra_nid_pages);
 797 F2FS_RW_ATTR(NM_INFO, f2fs_nm_info, dirty_nats_ratio, dirty_nats_ratio);
 798 F2FS_RW_ATTR(NM_INFO, f2fs_nm_info, max_roll_forward_node_blocks, max_rf_node_blocks);
 799 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, max_victim_search, max_victim_search);
 800 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, migration_granularity, migration_granularity);
 801 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, dir_level, dir_level);
 802 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, cp_interval, interval_time[CP_TIME]);
 803 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, idle_interval, interval_time[REQ_TIME]);
 804 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, discard_idle_interval,
 805                                         interval_time[DISCARD_TIME]);
 806 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, gc_idle_interval, interval_time[GC_TIME]);
 807 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info,
 808                 umount_discard_timeout, interval_time[UMOUNT_DISCARD_TIMEOUT]);
 809 #ifdef CONFIG_F2FS_IOSTAT
 810 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, iostat_enable, iostat_enable);
 811 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, iostat_period_ms, iostat_period_ms);
 812 #endif
 813 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, readdir_ra, readdir_ra);
 814 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, max_io_bytes, max_io_bytes);
 815 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, gc_pin_file_thresh, gc_pin_file_threshold);
 816 F2FS_RW_ATTR(F2FS_SBI, f2fs_super_block, extension_list, extension_list);
 817 #ifdef CONFIG_F2FS_FAULT_INJECTION
 818 F2FS_RW_ATTR(FAULT_INFO_RATE, f2fs_fault_info, inject_rate, inject_rate);
 819 F2FS_RW_ATTR(FAULT_INFO_TYPE, f2fs_fault_info, inject_type, inject_type);
 820 #endif
 821 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, data_io_flag, data_io_flag);
 822 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, node_io_flag, node_io_flag);
 823 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, gc_urgent_high_remaining, gc_urgent_high_remaining);
 824 F2FS_RW_ATTR(CPRC_INFO, ckpt_req_control, ckpt_thread_ioprio, ckpt_thread_ioprio);
 825 F2FS_GENERAL_RO_ATTR(dirty_segments);
 826 F2FS_GENERAL_RO_ATTR(free_segments);
 827 F2FS_GENERAL_RO_ATTR(ovp_segments);
 828 F2FS_GENERAL_RO_ATTR(lifetime_write_kbytes);
 829 F2FS_GENERAL_RO_ATTR(features);
 830 F2FS_GENERAL_RO_ATTR(current_reserved_blocks);
 831 F2FS_GENERAL_RO_ATTR(unusable);
 832 F2FS_GENERAL_RO_ATTR(encoding);
 833 F2FS_GENERAL_RO_ATTR(mounted_time_sec);
 834 F2FS_GENERAL_RO_ATTR(main_blkaddr);
 835 F2FS_GENERAL_RO_ATTR(pending_discard);
 836 #ifdef CONFIG_F2FS_STAT_FS
 837 F2FS_STAT_ATTR(STAT_INFO, f2fs_stat_info, cp_foreground_calls, cp_count);
 838 F2FS_STAT_ATTR(STAT_INFO, f2fs_stat_info, cp_background_calls, bg_cp_count);
 839 F2FS_STAT_ATTR(STAT_INFO, f2fs_stat_info, gc_foreground_calls, call_count);
 840 F2FS_STAT_ATTR(STAT_INFO, f2fs_stat_info, gc_background_calls, bg_gc);
 841 F2FS_GENERAL_RO_ATTR(moved_blocks_background);
 842 F2FS_GENERAL_RO_ATTR(moved_blocks_foreground);
 843 F2FS_GENERAL_RO_ATTR(avg_vblocks);
 844 #endif
 845
 846 #ifdef CONFIG_FS_ENCRYPTION
 847 F2FS_FEATURE_RO_ATTR(encryption);
 848 F2FS_FEATURE_RO_ATTR(test_dummy_encryption_v2);
 849 #if IS_ENABLED(CONFIG_UNICODE)
 850 F2FS_FEATURE_RO_ATTR(encrypted_casefold);
 851 #endif
 852 #endif /* CONFIG_FS_ENCRYPTION */
 853 #ifdef CONFIG_BLK_DEV_ZONED
 854 F2FS_FEATURE_RO_ATTR(block_zoned);
 855 F2FS_RO_ATTR(F2FS_SBI, f2fs_sb_info, unusable_blocks_per_sec,
 856                                         unusable_blocks_per_sec);
 857 #endif
 858 F2FS_FEATURE_RO_ATTR(atomic_write);
 859 F2FS_FEATURE_RO_ATTR(extra_attr);
 860 F2FS_FEATURE_RO_ATTR(project_quota);
 861 F2FS_FEATURE_RO_ATTR(inode_checksum);
 862 F2FS_FEATURE_RO_ATTR(flexible_inline_xattr);
 863 F2FS_FEATURE_RO_ATTR(quota_ino);
 864 F2FS_FEATURE_RO_ATTR(inode_crtime);
 865 F2FS_FEATURE_RO_ATTR(lost_found);
 866 #ifdef CONFIG_FS_VERITY
 867 F2FS_FEATURE_RO_ATTR(verity);
 868 #endif
 869 F2FS_FEATURE_RO_ATTR(sb_checksum);
 870 #if IS_ENABLED(CONFIG_UNICODE)
 871 F2FS_FEATURE_RO_ATTR(casefold);
 872 #endif
 873 F2FS_FEATURE_RO_ATTR(readonly);
 874 #ifdef CONFIG_F2FS_FS_COMPRESSION
 875 F2FS_FEATURE_RO_ATTR(compression);
 876 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, compr_written_block, compr_written_block);
 877 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, compr_saved_block, compr_saved_block);
 878 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, compr_new_inode, compr_new_inode);
 879 #endif
 880 F2FS_FEATURE_RO_ATTR(pin_file);
 881
 882 /* For ATGC */
 883 F2FS_RW_ATTR(ATGC_INFO, atgc_management, atgc_candidate_ratio, candidate_ratio);
 884 F2FS_RW_ATTR(ATGC_INFO, atgc_management, atgc_candidate_count, max_candidate_count);
 885 F2FS_RW_ATTR(ATGC_INFO, atgc_management, atgc_age_weight, age_weight);
 886 F2FS_RW_ATTR(ATGC_INFO, atgc_management, atgc_age_threshold, age_threshold);
 887
 888 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, seq_file_ra_mul, seq_file_ra_mul);
 889 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, gc_segment_mode, gc_segment_mode);
 890 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, gc_reclaimed_segments, gc_reclaimed_segs);
 891 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, max_fragment_chunk, max_fragment_chunk);
 892 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, max_fragment_hole, max_fragment_hole);
 893
 894 /* For atomic write */
 895 F2FS_RO_ATTR(F2FS_SBI, f2fs_sb_info, current_atomic_write, current_atomic_write);
 896 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, peak_atomic_write, peak_atomic_write);
 897 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, committed_atomic_block, committed_atomic_block);
 898 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, revoked_atomic_block, revoked_atomic_block);
 899
 900 #define ATTR_LIST(name) (&f2fs_attr_##name.attr)
 901 static struct attribute *f2fs_attrs[] = {
 902         ATTR_LIST(gc_urgent_sleep_time),
 903         ATTR_LIST(gc_min_sleep_time),
 904         ATTR_LIST(gc_max_sleep_time),
 905         ATTR_LIST(gc_no_gc_sleep_time),
 906         ATTR_LIST(gc_idle),
 907         ATTR_LIST(gc_urgent),
 908         ATTR_LIST(reclaim_segments),
 909         ATTR_LIST(main_blkaddr),
 910         ATTR_LIST(max_small_discards),
 911         ATTR_LIST(max_discard_request),
 912         ATTR_LIST(min_discard_issue_time),
 913         ATTR_LIST(mid_discard_issue_time),
 914         ATTR_LIST(max_discard_issue_time),
 915         ATTR_LIST(discard_granularity),
 916         ATTR_LIST(pending_discard),
 917         ATTR_LIST(batched_trim_sections),
 918         ATTR_LIST(ipu_policy),
 919         ATTR_LIST(min_ipu_util),
 920         ATTR_LIST(min_fsync_blocks),
 921         ATTR_LIST(min_seq_blocks),
 922         ATTR_LIST(min_hot_blocks),
 923         ATTR_LIST(min_ssr_sections),
 924         ATTR_LIST(max_victim_search),
 925         ATTR_LIST(migration_granularity),
 926         ATTR_LIST(dir_level),
 927         ATTR_LIST(ram_thresh),
 928         ATTR_LIST(ra_nid_pages),
 929         ATTR_LIST(dirty_nats_ratio),
 930         ATTR_LIST(max_roll_forward_node_blocks),
 931         ATTR_LIST(cp_interval),
 932         ATTR_LIST(idle_interval),
 933         ATTR_LIST(discard_idle_interval),
 934         ATTR_LIST(gc_idle_interval),
 935         ATTR_LIST(umount_discard_timeout),
 936 #ifdef CONFIG_F2FS_IOSTAT
 937         ATTR_LIST(iostat_enable),
 938         ATTR_LIST(iostat_period_ms),
 939 #endif
 940         ATTR_LIST(readdir_ra),
 941         ATTR_LIST(max_io_bytes),
 942         ATTR_LIST(gc_pin_file_thresh),
 943         ATTR_LIST(extension_list),
 944 #ifdef CONFIG_F2FS_FAULT_INJECTION
 945         ATTR_LIST(inject_rate),
 946         ATTR_LIST(inject_type),
 947 #endif
 948         ATTR_LIST(data_io_flag),
 949         ATTR_LIST(node_io_flag),
 950         ATTR_LIST(gc_urgent_high_remaining),
 951         ATTR_LIST(ckpt_thread_ioprio),
 952         ATTR_LIST(dirty_segments),
 953         ATTR_LIST(free_segments),
 954         ATTR_LIST(ovp_segments),
 955         ATTR_LIST(unusable),
 956         ATTR_LIST(lifetime_write_kbytes),
 957         ATTR_LIST(features),
 958         ATTR_LIST(reserved_blocks),
 959         ATTR_LIST(current_reserved_blocks),
 960         ATTR_LIST(encoding),
 961         ATTR_LIST(mounted_time_sec),
 962 #ifdef CONFIG_F2FS_STAT_FS
 963         ATTR_LIST(cp_foreground_calls),
 964         ATTR_LIST(cp_background_calls),
 965         ATTR_LIST(gc_foreground_calls),
 966         ATTR_LIST(gc_background_calls),
 967         ATTR_LIST(moved_blocks_foreground),
 968         ATTR_LIST(moved_blocks_background),
 969         ATTR_LIST(avg_vblocks),
 970 #endif
 971 #ifdef CONFIG_BLK_DEV_ZONED
 972         ATTR_LIST(unusable_blocks_per_sec),
 973 #endif
 974 #ifdef CONFIG_F2FS_FS_COMPRESSION
 975         ATTR_LIST(compr_written_block),
 976         ATTR_LIST(compr_saved_block),
 977         ATTR_LIST(compr_new_inode),
 978 #endif
 979         /* For ATGC */
 980         ATTR_LIST(atgc_candidate_ratio),
 981         ATTR_LIST(atgc_candidate_count),
 982         ATTR_LIST(atgc_age_weight),
 983         ATTR_LIST(atgc_age_threshold),
 984         ATTR_LIST(seq_file_ra_mul),
 985         ATTR_LIST(gc_segment_mode),
 986         ATTR_LIST(gc_reclaimed_segments),
 987         ATTR_LIST(max_fragment_chunk),
 988         ATTR_LIST(max_fragment_hole),
 989         ATTR_LIST(current_atomic_write),
 990         ATTR_LIST(peak_atomic_write),
 991         ATTR_LIST(committed_atomic_block),
 992         ATTR_LIST(revoked_atomic_block),
 993         NULL,
 994 };
 995 ATTRIBUTE_GROUPS(f2fs);
 996
 997 static struct attribute *f2fs_feat_attrs[] = {
 998 #ifdef CONFIG_FS_ENCRYPTION
 999         ATTR_LIST(encryption),
1000         ATTR_LIST(test_dummy_encryption_v2),
1001 #if IS_ENABLED(CONFIG_UNICODE)
1002         ATTR_LIST(encrypted_casefold),
1003 #endif
1004 #endif /* CONFIG_FS_ENCRYPTION */
1005 #ifdef CONFIG_BLK_DEV_ZONED
1006         ATTR_LIST(block_zoned),
1007 #endif
1008         ATTR_LIST(atomic_write),
1009         ATTR_LIST(extra_attr),
1010         ATTR_LIST(project_quota),
1011         ATTR_LIST(inode_checksum),
1012         ATTR_LIST(flexible_inline_xattr),
1013         ATTR_LIST(quota_ino),
1014         ATTR_LIST(inode_crtime),
1015         ATTR_LIST(lost_found),
1016 #ifdef CONFIG_FS_VERITY
1017         ATTR_LIST(verity),
1018 #endif
1019         ATTR_LIST(sb_checksum),
1020 #if IS_ENABLED(CONFIG_UNICODE)
1021         ATTR_LIST(casefold),
1022 #endif
1023         ATTR_LIST(readonly),
1024 #ifdef CONFIG_F2FS_FS_COMPRESSION
1025         ATTR_LIST(compression),
1026 #endif
1027         ATTR_LIST(pin_file),
1028         NULL,
1029 };
1030 ATTRIBUTE_GROUPS(f2fs_feat);
1031
1032 F2FS_GENERAL_RO_ATTR(sb_status);
1033 static struct attribute *f2fs_stat_attrs[] = {
1034         ATTR_LIST(sb_status),
1035         NULL,
1036 };
1037 ATTRIBUTE_GROUPS(f2fs_stat);
1038
1039 F2FS_SB_FEATURE_RO_ATTR(encryption, ENCRYPT);
1040 F2FS_SB_FEATURE_RO_ATTR(block_zoned, BLKZONED);
1041 F2FS_SB_FEATURE_RO_ATTR(extra_attr, EXTRA_ATTR);
1042 F2FS_SB_FEATURE_RO_ATTR(project_quota, PRJQUOTA);
1043 F2FS_SB_FEATURE_RO_ATTR(inode_checksum, INODE_CHKSUM);
1044 F2FS_SB_FEATURE_RO_ATTR(flexible_inline_xattr, FLEXIBLE_INLINE_XATTR);
1045 F2FS_SB_FEATURE_RO_ATTR(quota_ino, QUOTA_INO);
1046 F2FS_SB_FEATURE_RO_ATTR(inode_crtime, INODE_CRTIME);
1047 F2FS_SB_FEATURE_RO_ATTR(lost_found, LOST_FOUND);
1048 F2FS_SB_FEATURE_RO_ATTR(verity, VERITY);
1049 F2FS_SB_FEATURE_RO_ATTR(sb_checksum, SB_CHKSUM);
1050 F2FS_SB_FEATURE_RO_ATTR(casefold, CASEFOLD);
1051 F2FS_SB_FEATURE_RO_ATTR(compression, COMPRESSION);
1052 F2FS_SB_FEATURE_RO_ATTR(readonly, RO);
1053
1054 static struct attribute *f2fs_sb_feat_attrs[] = {
1055         ATTR_LIST(sb_encryption),
1056         ATTR_LIST(sb_block_zoned),
1057         ATTR_LIST(sb_extra_attr),
1058         ATTR_LIST(sb_project_quota),
1059         ATTR_LIST(sb_inode_checksum),
1060         ATTR_LIST(sb_flexible_inline_xattr),
1061         ATTR_LIST(sb_quota_ino),
1062         ATTR_LIST(sb_inode_crtime),
1063         ATTR_LIST(sb_lost_found),
1064         ATTR_LIST(sb_verity),
1065         ATTR_LIST(sb_sb_checksum),
1066         ATTR_LIST(sb_casefold),
1067         ATTR_LIST(sb_compression),
1068         ATTR_LIST(sb_readonly),
1069         NULL,
1070 };
1071 ATTRIBUTE_GROUPS(f2fs_sb_feat);
1072
1073 static const struct sysfs_ops f2fs_attr_ops = {
1074         .show   = f2fs_attr_show,
1075         .store  = f2fs_attr_store,
1076 };
1077
1078 static struct kobj_type f2fs_sb_ktype = {
1079         .default_groups = f2fs_groups,
1080         .sysfs_ops      = &f2fs_attr_ops,
1081         .release        = f2fs_sb_release,
1082 };
1083
1084 static struct kobj_type f2fs_ktype = {
1085         .sysfs_ops      = &f2fs_attr_ops,
1086 };
1087
1088 static struct kset f2fs_kset = {
1089         .kobj   = {.ktype = &f2fs_ktype},
1090 };
1091
1092 static struct kobj_type f2fs_feat_ktype = {
1093         .default_groups = f2fs_feat_groups,
1094         .sysfs_ops      = &f2fs_attr_ops,
1095 };
1096
1097 static struct kobject f2fs_feat = {
1098         .kset   = &f2fs_kset,
1099 };
1100
1101 static ssize_t f2fs_stat_attr_show(struct kobject *kobj,
1102                                 struct attribute *attr, char *buf)
1103 {
1104         struct f2fs_sb_info *sbi = container_of(kobj, struct f2fs_sb_info,
1105                                                                 s_stat_kobj);
1106         struct f2fs_attr *a = container_of(attr, struct f2fs_attr, attr);
1107
1108         return a->show ? a->show(a, sbi, buf) : 0;
1109 }
1110
1111 static ssize_t f2fs_stat_attr_store(struct kobject *kobj, struct attribute *attr,
1112                                                 const char *buf, size_t len)
1113 {
1114         struct f2fs_sb_info *sbi = container_of(kobj, struct f2fs_sb_info,
1115                                                                 s_stat_kobj);
1116         struct f2fs_attr *a = container_of(attr, struct f2fs_attr, attr);
1117
1118         return a->store ? a->store(a, sbi, buf, len) : 0;
1119 }
1120
1121 static void f2fs_stat_kobj_release(struct kobject *kobj)
1122 {
1123         struct f2fs_sb_info *sbi = container_of(kobj, struct f2fs_sb_info,
1124                                                                 s_stat_kobj);
1125         complete(&sbi->s_stat_kobj_unregister);
1126 }
1127
1128 static const struct sysfs_ops f2fs_stat_attr_ops = {
1129         .show   = f2fs_stat_attr_show,
1130         .store  = f2fs_stat_attr_store,
1131 };
1132
1133 static struct kobj_type f2fs_stat_ktype = {
1134         .default_groups = f2fs_stat_groups,
1135         .sysfs_ops      = &f2fs_stat_attr_ops,
1136         .release        = f2fs_stat_kobj_release,
1137 };
1138
1139 static ssize_t f2fs_sb_feat_attr_show(struct kobject *kobj,
1140                                 struct attribute *attr, char *buf)
1141 {
1142         struct f2fs_sb_info *sbi = container_of(kobj, struct f2fs_sb_info,
1143                                                         s_feature_list_kobj);
1144         struct f2fs_attr *a = container_of(attr, struct f2fs_attr, attr);
1145
1146         return a->show ? a->show(a, sbi, buf) : 0;
1147 }
1148
1149 static void f2fs_feature_list_kobj_release(struct kobject *kobj)
1150 {
1151         struct f2fs_sb_info *sbi = container_of(kobj, struct f2fs_sb_info,
1152                                                         s_feature_list_kobj);
1153         complete(&sbi->s_feature_list_kobj_unregister);
1154 }
1155
1156 static const struct sysfs_ops f2fs_feature_list_attr_ops = {
1157         .show   = f2fs_sb_feat_attr_show,
1158 };
1159
1160 static struct kobj_type f2fs_feature_list_ktype = {
1161         .default_groups = f2fs_sb_feat_groups,
1162         .sysfs_ops      = &f2fs_feature_list_attr_ops,
1163         .release        = f2fs_feature_list_kobj_release,
1164 };
1165
1166 static int __maybe_unused segment_info_seq_show(struct seq_file *seq,
1167                                                 void *offset)
1168 {
1169         struct super_block *sb = seq->private;
1170         struct f2fs_sb_info *sbi = F2FS_SB(sb);
1171         unsigned int total_segs =
1172                         le32_to_cpu(sbi->raw_super->segment_count_main);
1173         int i;
1174
1175         seq_puts(seq, "format: segment_type|valid_blocks\n"
1176                 "segment_type(0:HD, 1:WD, 2:CD, 3:HN, 4:WN, 5:CN)\n");
1177
1178         for (i = 0; i < total_segs; i++) {
1179                 struct seg_entry *se = get_seg_entry(sbi, i);
1180
1181                 if ((i % 10) == 0)
1182                         seq_printf(seq, "%-10d", i);
1183                 seq_printf(seq, "%d|%-3u", se->type, se->valid_blocks);
1184                 if ((i % 10) == 9 || i == (total_segs - 1))
1185                         seq_putc(seq, '\n');
1186                 else
1187                         seq_putc(seq, ' ');
1188         }
1189
1190         return 0;
1191 }
1192
1193 static int __maybe_unused segment_bits_seq_show(struct seq_file *seq,
1194                                                 void *offset)
1195 {
1196         struct super_block *sb = seq->private;
1197         struct f2fs_sb_info *sbi = F2FS_SB(sb);
1198         unsigned int total_segs =
1199                         le32_to_cpu(sbi->raw_super->segment_count_main);
1200         int i, j;
1201
1202         seq_puts(seq, "format: segment_type|valid_blocks|bitmaps\n"
1203                 "segment_type(0:HD, 1:WD, 2:CD, 3:HN, 4:WN, 5:CN)\n");
1204
1205         for (i = 0; i < total_segs; i++) {
1206                 struct seg_entry *se = get_seg_entry(sbi, i);
1207
1208                 seq_printf(seq, "%-10d", i);
1209                 seq_printf(seq, "%d|%-3u|", se->type, se->valid_blocks);
1210                 for (j = 0; j < SIT_VBLOCK_MAP_SIZE; j++)
1211                         seq_printf(seq, " %.2x", se->cur_valid_map[j]);
1212                 seq_putc(seq, '\n');
1213         }
1214         return 0;
1215 }
1216
1217 static int __maybe_unused victim_bits_seq_show(struct seq_file *seq,
1218                                                 void *offset)
1219 {
1220         struct super_block *sb = seq->private;
1221         struct f2fs_sb_info *sbi = F2FS_SB(sb);
1222         struct dirty_seglist_info *dirty_i = DIRTY_I(sbi);
1223         int i;
1224
1225         seq_puts(seq, "format: victim_secmap bitmaps\n");
1226
1227         for (i = 0; i < MAIN_SECS(sbi); i++) {
1228                 if ((i % 10) == 0)
1229                         seq_printf(seq, "%-10d", i);
1230                 seq_printf(seq, "%d", test_bit(i, dirty_i->victim_secmap) ? 1 : 0);
1231                 if ((i % 10) == 9 || i == (MAIN_SECS(sbi) - 1))
1232                         seq_putc(seq, '\n');
1233                 else
1234                         seq_putc(seq, ' ');
1235         }
1236         return 0;
1237 }
1238
1239 int __init f2fs_init_sysfs(void)
1240 {
1241         int ret;
1242
1243         kobject_set_name(&f2fs_kset.kobj, "f2fs");
1244         f2fs_kset.kobj.parent = fs_kobj;
1245         ret = kset_register(&f2fs_kset);
1246         if (ret)
1247                 return ret;
1248
1249         ret = kobject_init_and_add(&f2fs_feat, &f2fs_feat_ktype,
1250                                    NULL, "features");
1251         if (ret) {
1252                 kobject_put(&f2fs_feat);
1253                 kset_unregister(&f2fs_kset);
1254         } else {
1255                 f2fs_proc_root = proc_mkdir("fs/f2fs", NULL);
1256         }
1257         return ret;
1258 }
1259
1260 void f2fs_exit_sysfs(void)
1261 {
1262         kobject_put(&f2fs_feat);
1263         kset_unregister(&f2fs_kset);
1264         remove_proc_entry("fs/f2fs", NULL);
1265         f2fs_proc_root = NULL;
1266 }
1267
1268 int f2fs_register_sysfs(struct f2fs_sb_info *sbi)
1269 {
1270         struct super_block *sb = sbi->sb;
1271         int err;
1272
1273         sbi->s_kobj.kset = &f2fs_kset;
1274         init_completion(&sbi->s_kobj_unregister);
1275         err = kobject_init_and_add(&sbi->s_kobj, &f2fs_sb_ktype, NULL,
1276                                 "%s", sb->s_id);
1277         if (err)
1278                 goto put_sb_kobj;
1279
1280         sbi->s_stat_kobj.kset = &f2fs_kset;
1281         init_completion(&sbi->s_stat_kobj_unregister);
1282         err = kobject_init_and_add(&sbi->s_stat_kobj, &f2fs_stat_ktype,
1283                                                 &sbi->s_kobj, "stat");
1284         if (err)
1285                 goto put_stat_kobj;
1286
1287         sbi->s_feature_list_kobj.kset = &f2fs_kset;
1288         init_completion(&sbi->s_feature_list_kobj_unregister);
1289         err = kobject_init_and_add(&sbi->s_feature_list_kobj,
1290                                         &f2fs_feature_list_ktype,
1291                                         &sbi->s_kobj, "feature_list");
1292         if (err)
1293                 goto put_feature_list_kobj;
1294
1295         if (f2fs_proc_root)
1296                 sbi->s_proc = proc_mkdir(sb->s_id, f2fs_proc_root);
1297
1298         if (sbi->s_proc) {
1299                 proc_create_single_data("segment_info", 0444, sbi->s_proc,
1300                                 segment_info_seq_show, sb);
1301                 proc_create_single_data("segment_bits", 0444, sbi->s_proc,
1302                                 segment_bits_seq_show, sb);
1303 #ifdef CONFIG_F2FS_IOSTAT
1304                 proc_create_single_data("iostat_info", 0444, sbi->s_proc,
1305                                 iostat_info_seq_show, sb);
1306 #endif
1307                 proc_create_single_data("victim_bits", 0444, sbi->s_proc,
1308                                 victim_bits_seq_show, sb);
1309         }
1310         return 0;
1311 put_feature_list_kobj:
1312         kobject_put(&sbi->s_feature_list_kobj);
1313         wait_for_completion(&sbi->s_feature_list_kobj_unregister);
1314 put_stat_kobj:
1315         kobject_put(&sbi->s_stat_kobj);
1316         wait_for_completion(&sbi->s_stat_kobj_unregister);
1317 put_sb_kobj:
1318         kobject_put(&sbi->s_kobj);
1319         wait_for_completion(&sbi->s_kobj_unregister);
1320         return err;
1321 }
1322
1323 void f2fs_unregister_sysfs(struct f2fs_sb_info *sbi)
1324 {
1325         if (sbi->s_proc) {
1326 #ifdef CONFIG_F2FS_IOSTAT
1327                 remove_proc_entry("iostat_info", sbi->s_proc);
1328 #endif
1329                 remove_proc_entry("segment_info", sbi->s_proc);
1330                 remove_proc_entry("segment_bits", sbi->s_proc);
1331                 remove_proc_entry("victim_bits", sbi->s_proc);
1332                 remove_proc_entry(sbi->sb->s_id, f2fs_proc_root);
1333         }
1334
1335         kobject_del(&sbi->s_stat_kobj);
1336         kobject_put(&sbi->s_stat_kobj);
1337         wait_for_completion(&sbi->s_stat_kobj_unregister);
1338         kobject_del(&sbi->s_feature_list_kobj);
1339         kobject_put(&sbi->s_feature_list_kobj);
1340         wait_for_completion(&sbi->s_feature_list_kobj_unregister);
1341
1342         kobject_del(&sbi->s_kobj);
1343         kobject_put(&sbi->s_kobj);
1344         wait_for_completion(&sbi->s_kobj_unregister);
1345 }