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