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 struct f2fs_attr {
  45         struct attribute attr;
  46         ssize_t (*show)(struct f2fs_attr *, struct f2fs_sb_info *, char *);
  47         ssize_t (*store)(struct f2fs_attr *, struct f2fs_sb_info *,
  48                          const char *, size_t);
  49         int struct_type;
  50         int offset;
  51         int id;
  52 };
  53
  54 static ssize_t f2fs_sbi_show(struct f2fs_attr *a,
  55                              struct f2fs_sb_info *sbi, char *buf);
  56
  57 static unsigned char *__struct_ptr(struct f2fs_sb_info *sbi, int struct_type)
  58 {
  59         if (struct_type == GC_THREAD)
  60                 return (unsigned char *)sbi->gc_thread;
  61         else if (struct_type == SM_INFO)
  62                 return (unsigned char *)SM_I(sbi);
  63         else if (struct_type == DCC_INFO)
  64                 return (unsigned char *)SM_I(sbi)->dcc_info;
  65         else if (struct_type == NM_INFO)
  66                 return (unsigned char *)NM_I(sbi);
  67         else if (struct_type == F2FS_SBI || struct_type == RESERVED_BLOCKS)
  68                 return (unsigned char *)sbi;
  69 #ifdef CONFIG_F2FS_FAULT_INJECTION
  70         else if (struct_type == FAULT_INFO_RATE ||
  71                                         struct_type == FAULT_INFO_TYPE)
  72                 return (unsigned char *)&F2FS_OPTION(sbi).fault_info;
  73 #endif
  74 #ifdef CONFIG_F2FS_STAT_FS
  75         else if (struct_type == STAT_INFO)
  76                 return (unsigned char *)F2FS_STAT(sbi);
  77 #endif
  78         else if (struct_type == CPRC_INFO)
  79                 return (unsigned char *)&sbi->cprc_info;
  80         else if (struct_type == ATGC_INFO)
  81                 return (unsigned char *)&sbi->am;
  82         return NULL;
  83 }
  84
  85 static ssize_t dirty_segments_show(struct f2fs_attr *a,
  86                 struct f2fs_sb_info *sbi, char *buf)
  87 {
  88         return sprintf(buf, "%llu\n",
  89                         (unsigned long long)(dirty_segments(sbi)));
  90 }
  91
  92 static ssize_t free_segments_show(struct f2fs_attr *a,
  93                 struct f2fs_sb_info *sbi, char *buf)
  94 {
  95         return sprintf(buf, "%llu\n",
  96                         (unsigned long long)(free_segments(sbi)));
  97 }
  98
  99 static ssize_t ovp_segments_show(struct f2fs_attr *a,
 100                 struct f2fs_sb_info *sbi, char *buf)
 101 {
 102         return sprintf(buf, "%llu\n",
 103                         (unsigned long long)(overprovision_segments(sbi)));
 104 }
 105
 106 static ssize_t lifetime_write_kbytes_show(struct f2fs_attr *a,
 107                 struct f2fs_sb_info *sbi, char *buf)
 108 {
 109         return sprintf(buf, "%llu\n",
 110                         (unsigned long long)(sbi->kbytes_written +
 111                         ((f2fs_get_sectors_written(sbi) -
 112                                 sbi->sectors_written_start) >> 1)));
 113 }
 114
 115 static ssize_t sb_status_show(struct f2fs_attr *a,
 116                 struct f2fs_sb_info *sbi, char *buf)
 117 {
 118         return sprintf(buf, "%lx\n", sbi->s_flag);
 119 }
 120
 121 static ssize_t pending_discard_show(struct f2fs_attr *a,
 122                 struct f2fs_sb_info *sbi, char *buf)
 123 {
 124         if (!SM_I(sbi)->dcc_info)
 125                 return -EINVAL;
 126         return sprintf(buf, "%llu\n", (unsigned long long)atomic_read(
 127                                 &SM_I(sbi)->dcc_info->discard_cmd_cnt));
 128 }
 129
 130 static ssize_t features_show(struct f2fs_attr *a,
 131                 struct f2fs_sb_info *sbi, char *buf)
 132 {
 133         int len = 0;
 134
 135         if (f2fs_sb_has_encrypt(sbi))
 136                 len += scnprintf(buf, PAGE_SIZE - len, "%s",
 137                                                 "encryption");
 138         if (f2fs_sb_has_blkzoned(sbi))
 139                 len += scnprintf(buf + len, PAGE_SIZE - len, "%s%s",
 140                                 len ? ", " : "", "blkzoned");
 141         if (f2fs_sb_has_extra_attr(sbi))
 142                 len += scnprintf(buf + len, PAGE_SIZE - len, "%s%s",
 143                                 len ? ", " : "", "extra_attr");
 144         if (f2fs_sb_has_project_quota(sbi))
 145                 len += scnprintf(buf + len, PAGE_SIZE - len, "%s%s",
 146                                 len ? ", " : "", "projquota");
 147         if (f2fs_sb_has_inode_chksum(sbi))
 148                 len += scnprintf(buf + len, PAGE_SIZE - len, "%s%s",
 149                                 len ? ", " : "", "inode_checksum");
 150         if (f2fs_sb_has_flexible_inline_xattr(sbi))
 151                 len += scnprintf(buf + len, PAGE_SIZE - len, "%s%s",
 152                                 len ? ", " : "", "flexible_inline_xattr");
 153         if (f2fs_sb_has_quota_ino(sbi))
 154                 len += scnprintf(buf + len, PAGE_SIZE - len, "%s%s",
 155                                 len ? ", " : "", "quota_ino");
 156         if (f2fs_sb_has_inode_crtime(sbi))
 157                 len += scnprintf(buf + len, PAGE_SIZE - len, "%s%s",
 158                                 len ? ", " : "", "inode_crtime");
 159         if (f2fs_sb_has_lost_found(sbi))
 160                 len += scnprintf(buf + len, PAGE_SIZE - len, "%s%s",
 161                                 len ? ", " : "", "lost_found");
 162         if (f2fs_sb_has_verity(sbi))
 163                 len += scnprintf(buf + len, PAGE_SIZE - len, "%s%s",
 164                                 len ? ", " : "", "verity");
 165         if (f2fs_sb_has_sb_chksum(sbi))
 166                 len += scnprintf(buf + len, PAGE_SIZE - len, "%s%s",
 167                                 len ? ", " : "", "sb_checksum");
 168         if (f2fs_sb_has_casefold(sbi))
 169                 len += scnprintf(buf + len, PAGE_SIZE - len, "%s%s",
 170                                 len ? ", " : "", "casefold");
 171         if (f2fs_sb_has_readonly(sbi))
 172                 len += scnprintf(buf + len, PAGE_SIZE - len, "%s%s",
 173                                 len ? ", " : "", "readonly");
 174         if (f2fs_sb_has_compression(sbi))
 175                 len += scnprintf(buf + len, PAGE_SIZE - len, "%s%s",
 176                                 len ? ", " : "", "compression");
 177         len += scnprintf(buf + len, PAGE_SIZE - len, "%s%s",
 178                                 len ? ", " : "", "pin_file");
 179         len += scnprintf(buf + len, PAGE_SIZE - len, "\n");
 180         return len;
 181 }
 182
 183 static ssize_t current_reserved_blocks_show(struct f2fs_attr *a,
 184                                         struct f2fs_sb_info *sbi, char *buf)
 185 {
 186         return sprintf(buf, "%u\n", sbi->current_reserved_blocks);
 187 }
 188
 189 static ssize_t unusable_show(struct f2fs_attr *a,
 190                 struct f2fs_sb_info *sbi, char *buf)
 191 {
 192         block_t unusable;
 193
 194         if (test_opt(sbi, DISABLE_CHECKPOINT))
 195                 unusable = sbi->unusable_block_count;
 196         else
 197                 unusable = f2fs_get_unusable_blocks(sbi);
 198         return sprintf(buf, "%llu\n", (unsigned long long)unusable);
 199 }
 200
 201 static ssize_t encoding_show(struct f2fs_attr *a,
 202                 struct f2fs_sb_info *sbi, char *buf)
 203 {
 204 #if IS_ENABLED(CONFIG_UNICODE)
 205         struct super_block *sb = sbi->sb;
 206
 207         if (f2fs_sb_has_casefold(sbi))
 208                 return sysfs_emit(buf, "UTF-8 (%d.%d.%d)\n",
 209                         (sb->s_encoding->version >> 16) & 0xff,
 210                         (sb->s_encoding->version >> 8) & 0xff,
 211                         sb->s_encoding->version & 0xff);
 212 #endif
 213         return sprintf(buf, "(none)");
 214 }
 215
 216 static ssize_t mounted_time_sec_show(struct f2fs_attr *a,
 217                 struct f2fs_sb_info *sbi, char *buf)
 218 {
 219         return sprintf(buf, "%llu", SIT_I(sbi)->mounted_time);
 220 }
 221
 222 #ifdef CONFIG_F2FS_STAT_FS
 223 static ssize_t moved_blocks_foreground_show(struct f2fs_attr *a,
 224                                 struct f2fs_sb_info *sbi, char *buf)
 225 {
 226         struct f2fs_stat_info *si = F2FS_STAT(sbi);
 227
 228         return sprintf(buf, "%llu\n",
 229                 (unsigned long long)(si->tot_blks -
 230                         (si->bg_data_blks + si->bg_node_blks)));
 231 }
 232
 233 static ssize_t moved_blocks_background_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->bg_data_blks + si->bg_node_blks));
 240 }
 241
 242 static ssize_t avg_vblocks_show(struct f2fs_attr *a,
 243                 struct f2fs_sb_info *sbi, char *buf)
 244 {
 245         struct f2fs_stat_info *si = F2FS_STAT(sbi);
 246
 247         si->dirty_count = dirty_segments(sbi);
 248         f2fs_update_sit_info(sbi);
 249         return sprintf(buf, "%llu\n", (unsigned long long)(si->avg_vblocks));
 250 }
 251 #endif
 252
 253 static ssize_t main_blkaddr_show(struct f2fs_attr *a,
 254                                 struct f2fs_sb_info *sbi, char *buf)
 255 {
 256         return sysfs_emit(buf, "%llu\n",
 257                         (unsigned long long)MAIN_BLKADDR(sbi));
 258 }
 259
 260 static ssize_t f2fs_sbi_show(struct f2fs_attr *a,
 261                         struct f2fs_sb_info *sbi, char *buf)
 262 {
 263         unsigned char *ptr = NULL;
 264         unsigned int *ui;
 265
 266         ptr = __struct_ptr(sbi, a->struct_type);
 267         if (!ptr)
 268                 return -EINVAL;
 269
 270         if (!strcmp(a->attr.name, "extension_list")) {
 271                 __u8 (*extlist)[F2FS_EXTENSION_LEN] =
 272                                         sbi->raw_super->extension_list;
 273                 int cold_count = le32_to_cpu(sbi->raw_super->extension_count);
 274                 int hot_count = sbi->raw_super->hot_ext_count;
 275                 int len = 0, i;
 276
 277                 len += scnprintf(buf + len, PAGE_SIZE - len,
 278                                                 "cold file extension:\n");
 279                 for (i = 0; i < cold_count; i++)
 280                         len += scnprintf(buf + len, PAGE_SIZE - len, "%s\n",
 281                                                                 extlist[i]);
 282
 283                 len += scnprintf(buf + len, PAGE_SIZE - len,
 284                                                 "hot file extension:\n");
 285                 for (i = cold_count; i < cold_count + hot_count; i++)
 286                         len += scnprintf(buf + len, PAGE_SIZE - len, "%s\n",
 287                                                                 extlist[i]);
 288                 return len;
 289         }
 290
 291         if (!strcmp(a->attr.name, "ckpt_thread_ioprio")) {
 292                 struct ckpt_req_control *cprc = &sbi->cprc_info;
 293                 int len = 0;
 294                 int class = IOPRIO_PRIO_CLASS(cprc->ckpt_thread_ioprio);
 295                 int data = IOPRIO_PRIO_DATA(cprc->ckpt_thread_ioprio);
 296
 297                 if (class == IOPRIO_CLASS_RT)
 298                         len += scnprintf(buf + len, PAGE_SIZE - len, "rt,");
 299                 else if (class == IOPRIO_CLASS_BE)
 300                         len += scnprintf(buf + len, PAGE_SIZE - len, "be,");
 301                 else
 302                         return -EINVAL;
 303
 304                 len += scnprintf(buf + len, PAGE_SIZE - len, "%d\n", data);
 305                 return len;
 306         }
 307
 308 #ifdef CONFIG_F2FS_FS_COMPRESSION
 309         if (!strcmp(a->attr.name, "compr_written_block"))
 310                 return sysfs_emit(buf, "%llu\n", sbi->compr_written_block);
 311
 312         if (!strcmp(a->attr.name, "compr_saved_block"))
 313                 return sysfs_emit(buf, "%llu\n", sbi->compr_saved_block);
 314
 315         if (!strcmp(a->attr.name, "compr_new_inode"))
 316                 return sysfs_emit(buf, "%u\n", sbi->compr_new_inode);
 317 #endif
 318
 319         if (!strcmp(a->attr.name, "gc_segment_mode"))
 320                 return sysfs_emit(buf, "%u\n", sbi->gc_segment_mode);
 321
 322         if (!strcmp(a->attr.name, "gc_reclaimed_segments")) {
 323                 return sysfs_emit(buf, "%u\n",
 324                         sbi->gc_reclaimed_segs[sbi->gc_segment_mode]);
 325         }
 326
 327         ui = (unsigned int *)(ptr + a->offset);
 328
 329         return sprintf(buf, "%u\n", *ui);
 330 }
 331
 332 static ssize_t __sbi_store(struct f2fs_attr *a,
 333                         struct f2fs_sb_info *sbi,
 334                         const char *buf, size_t count)
 335 {
 336         unsigned char *ptr;
 337         unsigned long t;
 338         unsigned int *ui;
 339         ssize_t ret;
 340
 341         ptr = __struct_ptr(sbi, a->struct_type);
 342         if (!ptr)
 343                 return -EINVAL;
 344
 345         if (!strcmp(a->attr.name, "extension_list")) {
 346                 const char *name = strim((char *)buf);
 347                 bool set = true, hot;
 348
 349                 if (!strncmp(name, "[h]", 3))
 350                         hot = true;
 351                 else if (!strncmp(name, "[c]", 3))
 352                         hot = false;
 353                 else
 354                         return -EINVAL;
 355
 356                 name += 3;
 357
 358                 if (*name == '!') {
 359                         name++;
 360                         set = false;
 361                 }
 362
 363                 if (!strlen(name) || strlen(name) >= F2FS_EXTENSION_LEN)
 364                         return -EINVAL;
 365
 366                 down_write(&sbi->sb_lock);
 367
 368                 ret = f2fs_update_extension_list(sbi, name, hot, set);
 369                 if (ret)
 370                         goto out;
 371
 372                 ret = f2fs_commit_super(sbi, false);
 373                 if (ret)
 374                         f2fs_update_extension_list(sbi, name, hot, !set);
 375 out:
 376                 up_write(&sbi->sb_lock);
 377                 return ret ? ret : count;
 378         }
 379
 380         if (!strcmp(a->attr.name, "ckpt_thread_ioprio")) {
 381                 const char *name = strim((char *)buf);
 382                 struct ckpt_req_control *cprc = &sbi->cprc_info;
 383                 int class;
 384                 long data;
 385                 int ret;
 386
 387                 if (!strncmp(name, "rt,", 3))
 388                         class = IOPRIO_CLASS_RT;
 389                 else if (!strncmp(name, "be,", 3))
 390                         class = IOPRIO_CLASS_BE;
 391                 else
 392                         return -EINVAL;
 393
 394                 name += 3;
 395                 ret = kstrtol(name, 10, &data);
 396                 if (ret)
 397                         return ret;
 398                 if (data >= IOPRIO_NR_LEVELS || data < 0)
 399                         return -EINVAL;
 400
 401                 cprc->ckpt_thread_ioprio = IOPRIO_PRIO_VALUE(class, data);
 402                 if (test_opt(sbi, MERGE_CHECKPOINT)) {
 403                         ret = set_task_ioprio(cprc->f2fs_issue_ckpt,
 404                                         cprc->ckpt_thread_ioprio);
 405                         if (ret)
 406                                 return ret;
 407                 }
 408
 409                 return count;
 410         }
 411
 412         ui = (unsigned int *)(ptr + a->offset);
 413
 414         ret = kstrtoul(skip_spaces(buf), 0, &t);
 415         if (ret < 0)
 416                 return ret;
 417 #ifdef CONFIG_F2FS_FAULT_INJECTION
 418         if (a->struct_type == FAULT_INFO_TYPE && t >= (1 << FAULT_MAX))
 419                 return -EINVAL;
 420         if (a->struct_type == FAULT_INFO_RATE && t >= UINT_MAX)
 421                 return -EINVAL;
 422 #endif
 423         if (a->struct_type == RESERVED_BLOCKS) {
 424                 spin_lock(&sbi->stat_lock);
 425                 if (t > (unsigned long)(sbi->user_block_count -
 426                                 F2FS_OPTION(sbi).root_reserved_blocks -
 427                                 sbi->blocks_per_seg *
 428                                 SM_I(sbi)->additional_reserved_segments)) {
 429                         spin_unlock(&sbi->stat_lock);
 430                         return -EINVAL;
 431                 }
 432                 *ui = t;
 433                 sbi->current_reserved_blocks = min(sbi->reserved_blocks,
 434                                 sbi->user_block_count - valid_user_blocks(sbi));
 435                 spin_unlock(&sbi->stat_lock);
 436                 return count;
 437         }
 438
 439         if (!strcmp(a->attr.name, "discard_granularity")) {
 440                 if (t == 0 || t > MAX_PLIST_NUM)
 441                         return -EINVAL;
 442                 if (!f2fs_block_unit_discard(sbi))
 443                         return -EINVAL;
 444                 if (t == *ui)
 445                         return count;
 446                 *ui = t;
 447                 return count;
 448         }
 449
 450         if (!strcmp(a->attr.name, "migration_granularity")) {
 451                 if (t == 0 || t > sbi->segs_per_sec)
 452                         return -EINVAL;
 453         }
 454
 455         if (!strcmp(a->attr.name, "trim_sections"))
 456                 return -EINVAL;
 457
 458         if (!strcmp(a->attr.name, "gc_urgent")) {
 459                 if (t == 0) {
 460                         sbi->gc_mode = GC_NORMAL;
 461                 } else if (t == 1) {
 462                         sbi->gc_mode = GC_URGENT_HIGH;
 463                         if (sbi->gc_thread) {
 464                                 sbi->gc_thread->gc_wake = 1;
 465                                 wake_up_interruptible_all(
 466                                         &sbi->gc_thread->gc_wait_queue_head);
 467                                 wake_up_discard_thread(sbi, true);
 468                         }
 469                 } else if (t == 2) {
 470                         sbi->gc_mode = GC_URGENT_LOW;
 471                 } else {
 472                         return -EINVAL;
 473                 }
 474                 return count;
 475         }
 476         if (!strcmp(a->attr.name, "gc_idle")) {
 477                 if (t == GC_IDLE_CB) {
 478                         sbi->gc_mode = GC_IDLE_CB;
 479                 } else if (t == GC_IDLE_GREEDY) {
 480                         sbi->gc_mode = GC_IDLE_GREEDY;
 481                 } else if (t == GC_IDLE_AT) {
 482                         if (!sbi->am.atgc_enabled)
 483                                 return -EINVAL;
 484                         sbi->gc_mode = GC_AT;
 485                 } else {
 486                         sbi->gc_mode = GC_NORMAL;
 487                 }
 488                 return count;
 489         }
 490
 491         if (!strcmp(a->attr.name, "gc_urgent_high_remaining")) {
 492                 spin_lock(&sbi->gc_urgent_high_lock);
 493                 sbi->gc_urgent_high_limited = t != 0;
 494                 sbi->gc_urgent_high_remaining = t;
 495                 spin_unlock(&sbi->gc_urgent_high_lock);
 496
 497                 return count;
 498         }
 499
 500 #ifdef CONFIG_F2FS_IOSTAT
 501         if (!strcmp(a->attr.name, "iostat_enable")) {
 502                 sbi->iostat_enable = !!t;
 503                 if (!sbi->iostat_enable)
 504                         f2fs_reset_iostat(sbi);
 505                 return count;
 506         }
 507
 508         if (!strcmp(a->attr.name, "iostat_period_ms")) {
 509                 if (t < MIN_IOSTAT_PERIOD_MS || t > MAX_IOSTAT_PERIOD_MS)
 510                         return -EINVAL;
 511                 spin_lock(&sbi->iostat_lock);
 512                 sbi->iostat_period_ms = (unsigned int)t;
 513                 spin_unlock(&sbi->iostat_lock);
 514                 return count;
 515         }
 516 #endif
 517
 518 #ifdef CONFIG_F2FS_FS_COMPRESSION
 519         if (!strcmp(a->attr.name, "compr_written_block") ||
 520                 !strcmp(a->attr.name, "compr_saved_block")) {
 521                 if (t != 0)
 522                         return -EINVAL;
 523                 sbi->compr_written_block = 0;
 524                 sbi->compr_saved_block = 0;
 525                 return count;
 526         }
 527
 528         if (!strcmp(a->attr.name, "compr_new_inode")) {
 529                 if (t != 0)
 530                         return -EINVAL;
 531                 sbi->compr_new_inode = 0;
 532                 return count;
 533         }
 534 #endif
 535
 536         if (!strcmp(a->attr.name, "atgc_candidate_ratio")) {
 537                 if (t > 100)
 538                         return -EINVAL;
 539                 sbi->am.candidate_ratio = t;
 540                 return count;
 541         }
 542
 543         if (!strcmp(a->attr.name, "atgc_age_weight")) {
 544                 if (t > 100)
 545                         return -EINVAL;
 546                 sbi->am.age_weight = t;
 547                 return count;
 548         }
 549
 550         if (!strcmp(a->attr.name, "gc_segment_mode")) {
 551                 if (t < MAX_GC_MODE)
 552                         sbi->gc_segment_mode = t;
 553                 else
 554                         return -EINVAL;
 555                 return count;
 556         }
 557
 558         if (!strcmp(a->attr.name, "gc_reclaimed_segments")) {
 559                 if (t != 0)
 560                         return -EINVAL;
 561                 sbi->gc_reclaimed_segs[sbi->gc_segment_mode] = 0;
 562                 return count;
 563         }
 564
 565         if (!strcmp(a->attr.name, "seq_file_ra_mul")) {
 566                 if (t >= MIN_RA_MUL && t <= MAX_RA_MUL)
 567                         sbi->seq_file_ra_mul = t;
 568                 else
 569                         return -EINVAL;
 570                 return count;
 571         }
 572
 573         if (!strcmp(a->attr.name, "max_fragment_chunk")) {
 574                 if (t >= MIN_FRAGMENT_SIZE && t <= MAX_FRAGMENT_SIZE)
 575                         sbi->max_fragment_chunk = t;
 576                 else
 577                         return -EINVAL;
 578                 return count;
 579         }
 580
 581         if (!strcmp(a->attr.name, "max_fragment_hole")) {
 582                 if (t >= MIN_FRAGMENT_SIZE && t <= MAX_FRAGMENT_SIZE)
 583                         sbi->max_fragment_hole = t;
 584                 else
 585                         return -EINVAL;
 586                 return count;
 587         }
 588
 589         *ui = (unsigned int)t;
 590
 591         return count;
 592 }
 593
 594 static ssize_t f2fs_sbi_store(struct f2fs_attr *a,
 595                         struct f2fs_sb_info *sbi,
 596                         const char *buf, size_t count)
 597 {
 598         ssize_t ret;
 599         bool gc_entry = (!strcmp(a->attr.name, "gc_urgent") ||
 600                                         a->struct_type == GC_THREAD);
 601
 602         if (gc_entry) {
 603                 if (!down_read_trylock(&sbi->sb->s_umount))
 604                         return -EAGAIN;
 605         }
 606         ret = __sbi_store(a, sbi, buf, count);
 607         if (gc_entry)
 608                 up_read(&sbi->sb->s_umount);
 609
 610         return ret;
 611 }
 612
 613 static ssize_t f2fs_attr_show(struct kobject *kobj,
 614                                 struct attribute *attr, char *buf)
 615 {
 616         struct f2fs_sb_info *sbi = container_of(kobj, struct f2fs_sb_info,
 617                                                                 s_kobj);
 618         struct f2fs_attr *a = container_of(attr, struct f2fs_attr, attr);
 619
 620         return a->show ? a->show(a, sbi, buf) : 0;
 621 }
 622
 623 static ssize_t f2fs_attr_store(struct kobject *kobj, struct attribute *attr,
 624                                                 const char *buf, size_t len)
 625 {
 626         struct f2fs_sb_info *sbi = container_of(kobj, struct f2fs_sb_info,
 627                                                                         s_kobj);
 628         struct f2fs_attr *a = container_of(attr, struct f2fs_attr, attr);
 629
 630         return a->store ? a->store(a, sbi, buf, len) : 0;
 631 }
 632
 633 static void f2fs_sb_release(struct kobject *kobj)
 634 {
 635         struct f2fs_sb_info *sbi = container_of(kobj, struct f2fs_sb_info,
 636                                                                 s_kobj);
 637         complete(&sbi->s_kobj_unregister);
 638 }
 639
 640 /*
 641  * Note that there are three feature list entries:
 642  * 1) /sys/fs/f2fs/features
 643  *   : shows runtime features supported by in-kernel f2fs along with Kconfig.
 644  *     - ref. F2FS_FEATURE_RO_ATTR()
 645  *
 646  * 2) /sys/fs/f2fs/$s_id/features <deprecated>
 647  *   : shows on-disk features enabled by mkfs.f2fs, used for old kernels. This
 648  *     won't add new feature anymore, and thus, users should check entries in 3)
 649  *     instead of this 2).
 650  *
 651  * 3) /sys/fs/f2fs/$s_id/feature_list
 652  *   : shows on-disk features enabled by mkfs.f2fs per instance, which follows
 653  *     sysfs entry rule where each entry should expose single value.
 654  *     This list covers old feature list provided by 2) and beyond. Therefore,
 655  *     please add new on-disk feature in this list only.
 656  *     - ref. F2FS_SB_FEATURE_RO_ATTR()
 657  */
 658 static ssize_t f2fs_feature_show(struct f2fs_attr *a,
 659                 struct f2fs_sb_info *sbi, char *buf)
 660 {
 661         return sprintf(buf, "supported\n");
 662 }
 663
 664 #define F2FS_FEATURE_RO_ATTR(_name)                             \
 665 static struct f2fs_attr f2fs_attr_##_name = {                   \
 666         .attr = {.name = __stringify(_name), .mode = 0444 },    \
 667         .show   = f2fs_feature_show,                            \
 668 }
 669
 670 static ssize_t f2fs_sb_feature_show(struct f2fs_attr *a,
 671                 struct f2fs_sb_info *sbi, char *buf)
 672 {
 673         if (F2FS_HAS_FEATURE(sbi, a->id))
 674                 return sprintf(buf, "supported\n");
 675         return sprintf(buf, "unsupported\n");
 676 }
 677
 678 #define F2FS_SB_FEATURE_RO_ATTR(_name, _feat)                   \
 679 static struct f2fs_attr f2fs_attr_sb_##_name = {                \
 680         .attr = {.name = __stringify(_name), .mode = 0444 },    \
 681         .show   = f2fs_sb_feature_show,                         \
 682         .id     = F2FS_FEATURE_##_feat,                         \
 683 }
 684
 685 #define F2FS_ATTR_OFFSET(_struct_type, _name, _mode, _show, _store, _offset) \
 686 static struct f2fs_attr f2fs_attr_##_name = {                   \
 687         .attr = {.name = __stringify(_name), .mode = _mode },   \
 688         .show   = _show,                                        \
 689         .store  = _store,                                       \
 690         .struct_type = _struct_type,                            \
 691         .offset = _offset                                       \
 692 }
 693
 694 #define F2FS_RW_ATTR(struct_type, struct_name, name, elname)    \
 695         F2FS_ATTR_OFFSET(struct_type, name, 0644,               \
 696                 f2fs_sbi_show, f2fs_sbi_store,                  \
 697                 offsetof(struct struct_name, elname))
 698
 699 #define F2FS_GENERAL_RO_ATTR(name) \
 700 static struct f2fs_attr f2fs_attr_##name = __ATTR(name, 0444, name##_show, NULL)
 701
 702 #define F2FS_STAT_ATTR(_struct_type, _struct_name, _name, _elname)      \
 703 static struct f2fs_attr f2fs_attr_##_name = {                   \
 704         .attr = {.name = __stringify(_name), .mode = 0444 },    \
 705         .show = f2fs_sbi_show,                                  \
 706         .struct_type = _struct_type,                            \
 707         .offset = offsetof(struct _struct_name, _elname),       \
 708 }
 709
 710 F2FS_RW_ATTR(GC_THREAD, f2fs_gc_kthread, gc_urgent_sleep_time,
 711                                                         urgent_sleep_time);
 712 F2FS_RW_ATTR(GC_THREAD, f2fs_gc_kthread, gc_min_sleep_time, min_sleep_time);
 713 F2FS_RW_ATTR(GC_THREAD, f2fs_gc_kthread, gc_max_sleep_time, max_sleep_time);
 714 F2FS_RW_ATTR(GC_THREAD, f2fs_gc_kthread, gc_no_gc_sleep_time, no_gc_sleep_time);
 715 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, gc_idle, gc_mode);
 716 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, gc_urgent, gc_mode);
 717 F2FS_RW_ATTR(SM_INFO, f2fs_sm_info, reclaim_segments, rec_prefree_segments);
 718 F2FS_RW_ATTR(DCC_INFO, discard_cmd_control, max_small_discards, max_discards);
 719 F2FS_RW_ATTR(DCC_INFO, discard_cmd_control, discard_granularity, discard_granularity);
 720 F2FS_RW_ATTR(RESERVED_BLOCKS, f2fs_sb_info, reserved_blocks, reserved_blocks);
 721 F2FS_RW_ATTR(SM_INFO, f2fs_sm_info, batched_trim_sections, trim_sections);
 722 F2FS_RW_ATTR(SM_INFO, f2fs_sm_info, ipu_policy, ipu_policy);
 723 F2FS_RW_ATTR(SM_INFO, f2fs_sm_info, min_ipu_util, min_ipu_util);
 724 F2FS_RW_ATTR(SM_INFO, f2fs_sm_info, min_fsync_blocks, min_fsync_blocks);
 725 F2FS_RW_ATTR(SM_INFO, f2fs_sm_info, min_seq_blocks, min_seq_blocks);
 726 F2FS_RW_ATTR(SM_INFO, f2fs_sm_info, min_hot_blocks, min_hot_blocks);
 727 F2FS_RW_ATTR(SM_INFO, f2fs_sm_info, min_ssr_sections, min_ssr_sections);
 728 F2FS_RW_ATTR(NM_INFO, f2fs_nm_info, ram_thresh, ram_thresh);
 729 F2FS_RW_ATTR(NM_INFO, f2fs_nm_info, ra_nid_pages, ra_nid_pages);
 730 F2FS_RW_ATTR(NM_INFO, f2fs_nm_info, dirty_nats_ratio, dirty_nats_ratio);
 731 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, max_victim_search, max_victim_search);
 732 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, migration_granularity, migration_granularity);
 733 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, dir_level, dir_level);
 734 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, cp_interval, interval_time[CP_TIME]);
 735 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, idle_interval, interval_time[REQ_TIME]);
 736 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, discard_idle_interval,
 737                                         interval_time[DISCARD_TIME]);
 738 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, gc_idle_interval, interval_time[GC_TIME]);
 739 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info,
 740                 umount_discard_timeout, interval_time[UMOUNT_DISCARD_TIMEOUT]);
 741 #ifdef CONFIG_F2FS_IOSTAT
 742 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, iostat_enable, iostat_enable);
 743 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, iostat_period_ms, iostat_period_ms);
 744 #endif
 745 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, readdir_ra, readdir_ra);
 746 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, max_io_bytes, max_io_bytes);
 747 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, gc_pin_file_thresh, gc_pin_file_threshold);
 748 F2FS_RW_ATTR(F2FS_SBI, f2fs_super_block, extension_list, extension_list);
 749 #ifdef CONFIG_F2FS_FAULT_INJECTION
 750 F2FS_RW_ATTR(FAULT_INFO_RATE, f2fs_fault_info, inject_rate, inject_rate);
 751 F2FS_RW_ATTR(FAULT_INFO_TYPE, f2fs_fault_info, inject_type, inject_type);
 752 #endif
 753 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, data_io_flag, data_io_flag);
 754 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, node_io_flag, node_io_flag);
 755 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, gc_urgent_high_remaining, gc_urgent_high_remaining);
 756 F2FS_RW_ATTR(CPRC_INFO, ckpt_req_control, ckpt_thread_ioprio, ckpt_thread_ioprio);
 757 F2FS_GENERAL_RO_ATTR(dirty_segments);
 758 F2FS_GENERAL_RO_ATTR(free_segments);
 759 F2FS_GENERAL_RO_ATTR(ovp_segments);
 760 F2FS_GENERAL_RO_ATTR(lifetime_write_kbytes);
 761 F2FS_GENERAL_RO_ATTR(features);
 762 F2FS_GENERAL_RO_ATTR(current_reserved_blocks);
 763 F2FS_GENERAL_RO_ATTR(unusable);
 764 F2FS_GENERAL_RO_ATTR(encoding);
 765 F2FS_GENERAL_RO_ATTR(mounted_time_sec);
 766 F2FS_GENERAL_RO_ATTR(main_blkaddr);
 767 F2FS_GENERAL_RO_ATTR(pending_discard);
 768 #ifdef CONFIG_F2FS_STAT_FS
 769 F2FS_STAT_ATTR(STAT_INFO, f2fs_stat_info, cp_foreground_calls, cp_count);
 770 F2FS_STAT_ATTR(STAT_INFO, f2fs_stat_info, cp_background_calls, bg_cp_count);
 771 F2FS_STAT_ATTR(STAT_INFO, f2fs_stat_info, gc_foreground_calls, call_count);
 772 F2FS_STAT_ATTR(STAT_INFO, f2fs_stat_info, gc_background_calls, bg_gc);
 773 F2FS_GENERAL_RO_ATTR(moved_blocks_background);
 774 F2FS_GENERAL_RO_ATTR(moved_blocks_foreground);
 775 F2FS_GENERAL_RO_ATTR(avg_vblocks);
 776 #endif
 777
 778 #ifdef CONFIG_FS_ENCRYPTION
 779 F2FS_FEATURE_RO_ATTR(encryption);
 780 F2FS_FEATURE_RO_ATTR(test_dummy_encryption_v2);
 781 #if IS_ENABLED(CONFIG_UNICODE)
 782 F2FS_FEATURE_RO_ATTR(encrypted_casefold);
 783 #endif
 784 #endif /* CONFIG_FS_ENCRYPTION */
 785 #ifdef CONFIG_BLK_DEV_ZONED
 786 F2FS_FEATURE_RO_ATTR(block_zoned);
 787 #endif
 788 F2FS_FEATURE_RO_ATTR(atomic_write);
 789 F2FS_FEATURE_RO_ATTR(extra_attr);
 790 F2FS_FEATURE_RO_ATTR(project_quota);
 791 F2FS_FEATURE_RO_ATTR(inode_checksum);
 792 F2FS_FEATURE_RO_ATTR(flexible_inline_xattr);
 793 F2FS_FEATURE_RO_ATTR(quota_ino);
 794 F2FS_FEATURE_RO_ATTR(inode_crtime);
 795 F2FS_FEATURE_RO_ATTR(lost_found);
 796 #ifdef CONFIG_FS_VERITY
 797 F2FS_FEATURE_RO_ATTR(verity);
 798 #endif
 799 F2FS_FEATURE_RO_ATTR(sb_checksum);
 800 #if IS_ENABLED(CONFIG_UNICODE)
 801 F2FS_FEATURE_RO_ATTR(casefold);
 802 #endif
 803 F2FS_FEATURE_RO_ATTR(readonly);
 804 #ifdef CONFIG_F2FS_FS_COMPRESSION
 805 F2FS_FEATURE_RO_ATTR(compression);
 806 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, compr_written_block, compr_written_block);
 807 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, compr_saved_block, compr_saved_block);
 808 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, compr_new_inode, compr_new_inode);
 809 #endif
 810 F2FS_FEATURE_RO_ATTR(pin_file);
 811
 812 /* For ATGC */
 813 F2FS_RW_ATTR(ATGC_INFO, atgc_management, atgc_candidate_ratio, candidate_ratio);
 814 F2FS_RW_ATTR(ATGC_INFO, atgc_management, atgc_candidate_count, max_candidate_count);
 815 F2FS_RW_ATTR(ATGC_INFO, atgc_management, atgc_age_weight, age_weight);
 816 F2FS_RW_ATTR(ATGC_INFO, atgc_management, atgc_age_threshold, age_threshold);
 817
 818 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, seq_file_ra_mul, seq_file_ra_mul);
 819 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, gc_segment_mode, gc_segment_mode);
 820 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, gc_reclaimed_segments, gc_reclaimed_segs);
 821 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, max_fragment_chunk, max_fragment_chunk);
 822 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, max_fragment_hole, max_fragment_hole);
 823
 824 #define ATTR_LIST(name) (&f2fs_attr_##name.attr)
 825 static struct attribute *f2fs_attrs[] = {
 826         ATTR_LIST(gc_urgent_sleep_time),
 827         ATTR_LIST(gc_min_sleep_time),
 828         ATTR_LIST(gc_max_sleep_time),
 829         ATTR_LIST(gc_no_gc_sleep_time),
 830         ATTR_LIST(gc_idle),
 831         ATTR_LIST(gc_urgent),
 832         ATTR_LIST(reclaim_segments),
 833         ATTR_LIST(main_blkaddr),
 834         ATTR_LIST(max_small_discards),
 835         ATTR_LIST(discard_granularity),
 836         ATTR_LIST(pending_discard),
 837         ATTR_LIST(batched_trim_sections),
 838         ATTR_LIST(ipu_policy),
 839         ATTR_LIST(min_ipu_util),
 840         ATTR_LIST(min_fsync_blocks),
 841         ATTR_LIST(min_seq_blocks),
 842         ATTR_LIST(min_hot_blocks),
 843         ATTR_LIST(min_ssr_sections),
 844         ATTR_LIST(max_victim_search),
 845         ATTR_LIST(migration_granularity),
 846         ATTR_LIST(dir_level),
 847         ATTR_LIST(ram_thresh),
 848         ATTR_LIST(ra_nid_pages),
 849         ATTR_LIST(dirty_nats_ratio),
 850         ATTR_LIST(cp_interval),
 851         ATTR_LIST(idle_interval),
 852         ATTR_LIST(discard_idle_interval),
 853         ATTR_LIST(gc_idle_interval),
 854         ATTR_LIST(umount_discard_timeout),
 855 #ifdef CONFIG_F2FS_IOSTAT
 856         ATTR_LIST(iostat_enable),
 857         ATTR_LIST(iostat_period_ms),
 858 #endif
 859         ATTR_LIST(readdir_ra),
 860         ATTR_LIST(max_io_bytes),
 861         ATTR_LIST(gc_pin_file_thresh),
 862         ATTR_LIST(extension_list),
 863 #ifdef CONFIG_F2FS_FAULT_INJECTION
 864         ATTR_LIST(inject_rate),
 865         ATTR_LIST(inject_type),
 866 #endif
 867         ATTR_LIST(data_io_flag),
 868         ATTR_LIST(node_io_flag),
 869         ATTR_LIST(gc_urgent_high_remaining),
 870         ATTR_LIST(ckpt_thread_ioprio),
 871         ATTR_LIST(dirty_segments),
 872         ATTR_LIST(free_segments),
 873         ATTR_LIST(ovp_segments),
 874         ATTR_LIST(unusable),
 875         ATTR_LIST(lifetime_write_kbytes),
 876         ATTR_LIST(features),
 877         ATTR_LIST(reserved_blocks),
 878         ATTR_LIST(current_reserved_blocks),
 879         ATTR_LIST(encoding),
 880         ATTR_LIST(mounted_time_sec),
 881 #ifdef CONFIG_F2FS_STAT_FS
 882         ATTR_LIST(cp_foreground_calls),
 883         ATTR_LIST(cp_background_calls),
 884         ATTR_LIST(gc_foreground_calls),
 885         ATTR_LIST(gc_background_calls),
 886         ATTR_LIST(moved_blocks_foreground),
 887         ATTR_LIST(moved_blocks_background),
 888         ATTR_LIST(avg_vblocks),
 889 #endif
 890 #ifdef CONFIG_F2FS_FS_COMPRESSION
 891         ATTR_LIST(compr_written_block),
 892         ATTR_LIST(compr_saved_block),
 893         ATTR_LIST(compr_new_inode),
 894 #endif
 895         /* For ATGC */
 896         ATTR_LIST(atgc_candidate_ratio),
 897         ATTR_LIST(atgc_candidate_count),
 898         ATTR_LIST(atgc_age_weight),
 899         ATTR_LIST(atgc_age_threshold),
 900         ATTR_LIST(seq_file_ra_mul),
 901         ATTR_LIST(gc_segment_mode),
 902         ATTR_LIST(gc_reclaimed_segments),
 903         ATTR_LIST(max_fragment_chunk),
 904         ATTR_LIST(max_fragment_hole),
 905         NULL,
 906 };
 907 ATTRIBUTE_GROUPS(f2fs);
 908
 909 static struct attribute *f2fs_feat_attrs[] = {
 910 #ifdef CONFIG_FS_ENCRYPTION
 911         ATTR_LIST(encryption),
 912         ATTR_LIST(test_dummy_encryption_v2),
 913 #if IS_ENABLED(CONFIG_UNICODE)
 914         ATTR_LIST(encrypted_casefold),
 915 #endif
 916 #endif /* CONFIG_FS_ENCRYPTION */
 917 #ifdef CONFIG_BLK_DEV_ZONED
 918         ATTR_LIST(block_zoned),
 919 #endif
 920         ATTR_LIST(atomic_write),
 921         ATTR_LIST(extra_attr),
 922         ATTR_LIST(project_quota),
 923         ATTR_LIST(inode_checksum),
 924         ATTR_LIST(flexible_inline_xattr),
 925         ATTR_LIST(quota_ino),
 926         ATTR_LIST(inode_crtime),
 927         ATTR_LIST(lost_found),
 928 #ifdef CONFIG_FS_VERITY
 929         ATTR_LIST(verity),
 930 #endif
 931         ATTR_LIST(sb_checksum),
 932 #if IS_ENABLED(CONFIG_UNICODE)
 933         ATTR_LIST(casefold),
 934 #endif
 935         ATTR_LIST(readonly),
 936 #ifdef CONFIG_F2FS_FS_COMPRESSION
 937         ATTR_LIST(compression),
 938 #endif
 939         ATTR_LIST(pin_file),
 940         NULL,
 941 };
 942 ATTRIBUTE_GROUPS(f2fs_feat);
 943
 944 F2FS_GENERAL_RO_ATTR(sb_status);
 945 static struct attribute *f2fs_stat_attrs[] = {
 946         ATTR_LIST(sb_status),
 947         NULL,
 948 };
 949 ATTRIBUTE_GROUPS(f2fs_stat);
 950
 951 F2FS_SB_FEATURE_RO_ATTR(encryption, ENCRYPT);
 952 F2FS_SB_FEATURE_RO_ATTR(block_zoned, BLKZONED);
 953 F2FS_SB_FEATURE_RO_ATTR(extra_attr, EXTRA_ATTR);
 954 F2FS_SB_FEATURE_RO_ATTR(project_quota, PRJQUOTA);
 955 F2FS_SB_FEATURE_RO_ATTR(inode_checksum, INODE_CHKSUM);
 956 F2FS_SB_FEATURE_RO_ATTR(flexible_inline_xattr, FLEXIBLE_INLINE_XATTR);
 957 F2FS_SB_FEATURE_RO_ATTR(quota_ino, QUOTA_INO);
 958 F2FS_SB_FEATURE_RO_ATTR(inode_crtime, INODE_CRTIME);
 959 F2FS_SB_FEATURE_RO_ATTR(lost_found, LOST_FOUND);
 960 F2FS_SB_FEATURE_RO_ATTR(verity, VERITY);
 961 F2FS_SB_FEATURE_RO_ATTR(sb_checksum, SB_CHKSUM);
 962 F2FS_SB_FEATURE_RO_ATTR(casefold, CASEFOLD);
 963 F2FS_SB_FEATURE_RO_ATTR(compression, COMPRESSION);
 964 F2FS_SB_FEATURE_RO_ATTR(readonly, RO);
 965
 966 static struct attribute *f2fs_sb_feat_attrs[] = {
 967         ATTR_LIST(sb_encryption),
 968         ATTR_LIST(sb_block_zoned),
 969         ATTR_LIST(sb_extra_attr),
 970         ATTR_LIST(sb_project_quota),
 971         ATTR_LIST(sb_inode_checksum),
 972         ATTR_LIST(sb_flexible_inline_xattr),
 973         ATTR_LIST(sb_quota_ino),
 974         ATTR_LIST(sb_inode_crtime),
 975         ATTR_LIST(sb_lost_found),
 976         ATTR_LIST(sb_verity),
 977         ATTR_LIST(sb_sb_checksum),
 978         ATTR_LIST(sb_casefold),
 979         ATTR_LIST(sb_compression),
 980         ATTR_LIST(sb_readonly),
 981         NULL,
 982 };
 983 ATTRIBUTE_GROUPS(f2fs_sb_feat);
 984
 985 static const struct sysfs_ops f2fs_attr_ops = {
 986         .show   = f2fs_attr_show,
 987         .store  = f2fs_attr_store,
 988 };
 989
 990 static struct kobj_type f2fs_sb_ktype = {
 991         .default_groups = f2fs_groups,
 992         .sysfs_ops      = &f2fs_attr_ops,
 993         .release        = f2fs_sb_release,
 994 };
 995
 996 static struct kobj_type f2fs_ktype = {
 997         .sysfs_ops      = &f2fs_attr_ops,
 998 };
 999
1000 static struct kset f2fs_kset = {
1001         .kobj   = {.ktype = &f2fs_ktype},
1002 };
1003
1004 static struct kobj_type f2fs_feat_ktype = {
1005         .default_groups = f2fs_feat_groups,
1006         .sysfs_ops      = &f2fs_attr_ops,
1007 };
1008
1009 static struct kobject f2fs_feat = {
1010         .kset   = &f2fs_kset,
1011 };
1012
1013 static ssize_t f2fs_stat_attr_show(struct kobject *kobj,
1014                                 struct attribute *attr, char *buf)
1015 {
1016         struct f2fs_sb_info *sbi = container_of(kobj, struct f2fs_sb_info,
1017                                                                 s_stat_kobj);
1018         struct f2fs_attr *a = container_of(attr, struct f2fs_attr, attr);
1019
1020         return a->show ? a->show(a, sbi, buf) : 0;
1021 }
1022
1023 static ssize_t f2fs_stat_attr_store(struct kobject *kobj, struct attribute *attr,
1024                                                 const char *buf, size_t len)
1025 {
1026         struct f2fs_sb_info *sbi = container_of(kobj, struct f2fs_sb_info,
1027                                                                 s_stat_kobj);
1028         struct f2fs_attr *a = container_of(attr, struct f2fs_attr, attr);
1029
1030         return a->store ? a->store(a, sbi, buf, len) : 0;
1031 }
1032
1033 static void f2fs_stat_kobj_release(struct kobject *kobj)
1034 {
1035         struct f2fs_sb_info *sbi = container_of(kobj, struct f2fs_sb_info,
1036                                                                 s_stat_kobj);
1037         complete(&sbi->s_stat_kobj_unregister);
1038 }
1039
1040 static const struct sysfs_ops f2fs_stat_attr_ops = {
1041         .show   = f2fs_stat_attr_show,
1042         .store  = f2fs_stat_attr_store,
1043 };
1044
1045 static struct kobj_type f2fs_stat_ktype = {
1046         .default_groups = f2fs_stat_groups,
1047         .sysfs_ops      = &f2fs_stat_attr_ops,
1048         .release        = f2fs_stat_kobj_release,
1049 };
1050
1051 static ssize_t f2fs_sb_feat_attr_show(struct kobject *kobj,
1052                                 struct attribute *attr, char *buf)
1053 {
1054         struct f2fs_sb_info *sbi = container_of(kobj, struct f2fs_sb_info,
1055                                                         s_feature_list_kobj);
1056         struct f2fs_attr *a = container_of(attr, struct f2fs_attr, attr);
1057
1058         return a->show ? a->show(a, sbi, buf) : 0;
1059 }
1060
1061 static void f2fs_feature_list_kobj_release(struct kobject *kobj)
1062 {
1063         struct f2fs_sb_info *sbi = container_of(kobj, struct f2fs_sb_info,
1064                                                         s_feature_list_kobj);
1065         complete(&sbi->s_feature_list_kobj_unregister);
1066 }
1067
1068 static const struct sysfs_ops f2fs_feature_list_attr_ops = {
1069         .show   = f2fs_sb_feat_attr_show,
1070 };
1071
1072 static struct kobj_type f2fs_feature_list_ktype = {
1073         .default_groups = f2fs_sb_feat_groups,
1074         .sysfs_ops      = &f2fs_feature_list_attr_ops,
1075         .release        = f2fs_feature_list_kobj_release,
1076 };
1077
1078 static int __maybe_unused segment_info_seq_show(struct seq_file *seq,
1079                                                 void *offset)
1080 {
1081         struct super_block *sb = seq->private;
1082         struct f2fs_sb_info *sbi = F2FS_SB(sb);
1083         unsigned int total_segs =
1084                         le32_to_cpu(sbi->raw_super->segment_count_main);
1085         int i;
1086
1087         seq_puts(seq, "format: segment_type|valid_blocks\n"
1088                 "segment_type(0:HD, 1:WD, 2:CD, 3:HN, 4:WN, 5:CN)\n");
1089
1090         for (i = 0; i < total_segs; i++) {
1091                 struct seg_entry *se = get_seg_entry(sbi, i);
1092
1093                 if ((i % 10) == 0)
1094                         seq_printf(seq, "%-10d", i);
1095                 seq_printf(seq, "%d|%-3u", se->type, se->valid_blocks);
1096                 if ((i % 10) == 9 || i == (total_segs - 1))
1097                         seq_putc(seq, '\n');
1098                 else
1099                         seq_putc(seq, ' ');
1100         }
1101
1102         return 0;
1103 }
1104
1105 static int __maybe_unused segment_bits_seq_show(struct seq_file *seq,
1106                                                 void *offset)
1107 {
1108         struct super_block *sb = seq->private;
1109         struct f2fs_sb_info *sbi = F2FS_SB(sb);
1110         unsigned int total_segs =
1111                         le32_to_cpu(sbi->raw_super->segment_count_main);
1112         int i, j;
1113
1114         seq_puts(seq, "format: segment_type|valid_blocks|bitmaps\n"
1115                 "segment_type(0:HD, 1:WD, 2:CD, 3:HN, 4:WN, 5:CN)\n");
1116
1117         for (i = 0; i < total_segs; i++) {
1118                 struct seg_entry *se = get_seg_entry(sbi, i);
1119
1120                 seq_printf(seq, "%-10d", i);
1121                 seq_printf(seq, "%d|%-3u|", se->type, se->valid_blocks);
1122                 for (j = 0; j < SIT_VBLOCK_MAP_SIZE; j++)
1123                         seq_printf(seq, " %.2x", se->cur_valid_map[j]);
1124                 seq_putc(seq, '\n');
1125         }
1126         return 0;
1127 }
1128
1129 static int __maybe_unused victim_bits_seq_show(struct seq_file *seq,
1130                                                 void *offset)
1131 {
1132         struct super_block *sb = seq->private;
1133         struct f2fs_sb_info *sbi = F2FS_SB(sb);
1134         struct dirty_seglist_info *dirty_i = DIRTY_I(sbi);
1135         int i;
1136
1137         seq_puts(seq, "format: victim_secmap bitmaps\n");
1138
1139         for (i = 0; i < MAIN_SECS(sbi); i++) {
1140                 if ((i % 10) == 0)
1141                         seq_printf(seq, "%-10d", i);
1142                 seq_printf(seq, "%d", test_bit(i, dirty_i->victim_secmap) ? 1 : 0);
1143                 if ((i % 10) == 9 || i == (MAIN_SECS(sbi) - 1))
1144                         seq_putc(seq, '\n');
1145                 else
1146                         seq_putc(seq, ' ');
1147         }
1148         return 0;
1149 }
1150
1151 int __init f2fs_init_sysfs(void)
1152 {
1153         int ret;
1154
1155         kobject_set_name(&f2fs_kset.kobj, "f2fs");
1156         f2fs_kset.kobj.parent = fs_kobj;
1157         ret = kset_register(&f2fs_kset);
1158         if (ret)
1159                 return ret;
1160
1161         ret = kobject_init_and_add(&f2fs_feat, &f2fs_feat_ktype,
1162                                    NULL, "features");
1163         if (ret) {
1164                 kobject_put(&f2fs_feat);
1165                 kset_unregister(&f2fs_kset);
1166         } else {
1167                 f2fs_proc_root = proc_mkdir("fs/f2fs", NULL);
1168         }
1169         return ret;
1170 }
1171
1172 void f2fs_exit_sysfs(void)
1173 {
1174         kobject_put(&f2fs_feat);
1175         kset_unregister(&f2fs_kset);
1176         remove_proc_entry("fs/f2fs", NULL);
1177         f2fs_proc_root = NULL;
1178 }
1179
1180 int f2fs_register_sysfs(struct f2fs_sb_info *sbi)
1181 {
1182         struct super_block *sb = sbi->sb;
1183         int err;
1184
1185         sbi->s_kobj.kset = &f2fs_kset;
1186         init_completion(&sbi->s_kobj_unregister);
1187         err = kobject_init_and_add(&sbi->s_kobj, &f2fs_sb_ktype, NULL,
1188                                 "%s", sb->s_id);
1189         if (err)
1190                 goto put_sb_kobj;
1191
1192         sbi->s_stat_kobj.kset = &f2fs_kset;
1193         init_completion(&sbi->s_stat_kobj_unregister);
1194         err = kobject_init_and_add(&sbi->s_stat_kobj, &f2fs_stat_ktype,
1195                                                 &sbi->s_kobj, "stat");
1196         if (err)
1197                 goto put_stat_kobj;
1198
1199         sbi->s_feature_list_kobj.kset = &f2fs_kset;
1200         init_completion(&sbi->s_feature_list_kobj_unregister);
1201         err = kobject_init_and_add(&sbi->s_feature_list_kobj,
1202                                         &f2fs_feature_list_ktype,
1203                                         &sbi->s_kobj, "feature_list");
1204         if (err)
1205                 goto put_feature_list_kobj;
1206
1207         if (f2fs_proc_root)
1208                 sbi->s_proc = proc_mkdir(sb->s_id, f2fs_proc_root);
1209
1210         if (sbi->s_proc) {
1211                 proc_create_single_data("segment_info", 0444, sbi->s_proc,
1212                                 segment_info_seq_show, sb);
1213                 proc_create_single_data("segment_bits", 0444, sbi->s_proc,
1214                                 segment_bits_seq_show, sb);
1215 #ifdef CONFIG_F2FS_IOSTAT
1216                 proc_create_single_data("iostat_info", 0444, sbi->s_proc,
1217                                 iostat_info_seq_show, sb);
1218 #endif
1219                 proc_create_single_data("victim_bits", 0444, sbi->s_proc,
1220                                 victim_bits_seq_show, sb);
1221         }
1222         return 0;
1223 put_feature_list_kobj:
1224         kobject_put(&sbi->s_feature_list_kobj);
1225         wait_for_completion(&sbi->s_feature_list_kobj_unregister);
1226 put_stat_kobj:
1227         kobject_put(&sbi->s_stat_kobj);
1228         wait_for_completion(&sbi->s_stat_kobj_unregister);
1229 put_sb_kobj:
1230         kobject_put(&sbi->s_kobj);
1231         wait_for_completion(&sbi->s_kobj_unregister);
1232         return err;
1233 }
1234
1235 void f2fs_unregister_sysfs(struct f2fs_sb_info *sbi)
1236 {
1237         if (sbi->s_proc) {
1238 #ifdef CONFIG_F2FS_IOSTAT
1239                 remove_proc_entry("iostat_info", sbi->s_proc);
1240 #endif
1241                 remove_proc_entry("segment_info", sbi->s_proc);
1242                 remove_proc_entry("segment_bits", sbi->s_proc);
1243                 remove_proc_entry("victim_bits", sbi->s_proc);
1244                 remove_proc_entry(sbi->sb->s_id, f2fs_proc_root);
1245         }
1246
1247         kobject_del(&sbi->s_stat_kobj);
1248         kobject_put(&sbi->s_stat_kobj);
1249         wait_for_completion(&sbi->s_stat_kobj_unregister);
1250         kobject_del(&sbi->s_feature_list_kobj);
1251         kobject_put(&sbi->s_feature_list_kobj);
1252         wait_for_completion(&sbi->s_feature_list_kobj_unregister);
1253
1254         kobject_del(&sbi->s_kobj);
1255         kobject_put(&sbi->s_kobj);
1256         wait_for_completion(&sbi->s_kobj_unregister);
1257 }