fs/f2fs/sysfs.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 /*
   3  * f2fs sysfs interface
   4  *
   5  * Copyright (c) 2012 Samsung Electronics Co., Ltd.
   6  *             http://www.samsung.com/
   7  * Copyright (c) 2017 Chao Yu <[email protected]>
   8  */
   9 #include <linux/compiler.h>
  10 #include <linux/proc_fs.h>
  11 #include <linux/f2fs_fs.h>
  12 #include <linux/seq_file.h>
  13 #include <linux/unicode.h>
  14 #include <linux/ioprio.h>
  15 #include <linux/sysfs.h>
  16
  17 #include "f2fs.h"
  18 #include "segment.h"
  19 #include "gc.h"
  20 #include "iostat.h"
  21 #include <trace/events/f2fs.h>
  22
  23 static struct proc_dir_entry *f2fs_proc_root;
  24
  25 /* Sysfs support for f2fs */
  26 enum {
  27         GC_THREAD,      /* struct f2fs_gc_thread */
  28         SM_INFO,        /* struct f2fs_sm_info */
  29         DCC_INFO,       /* struct discard_cmd_control */
  30         NM_INFO,        /* struct f2fs_nm_info */
  31         F2FS_SBI,       /* struct f2fs_sb_info */
  32 #ifdef CONFIG_F2FS_STAT_FS
  33         STAT_INFO,      /* struct f2fs_stat_info */
  34 #endif
  35 #ifdef CONFIG_F2FS_FAULT_INJECTION
  36         FAULT_INFO_RATE,        /* struct f2fs_fault_info */
  37         FAULT_INFO_TYPE,        /* struct f2fs_fault_info */
  38 #endif
  39         RESERVED_BLOCKS,        /* struct f2fs_sb_info */
  40         CPRC_INFO,      /* struct ckpt_req_control */
  41         ATGC_INFO,      /* struct atgc_management */
  42 };
  43
  44 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 features_show(struct f2fs_attr *a,
 122                 struct f2fs_sb_info *sbi, char *buf)
 123 {
 124         int len = 0;
 125
 126         if (f2fs_sb_has_encrypt(sbi))
 127                 len += scnprintf(buf, PAGE_SIZE - len, "%s",
 128                                                 "encryption");
 129         if (f2fs_sb_has_blkzoned(sbi))
 130                 len += scnprintf(buf + len, PAGE_SIZE - len, "%s%s",
 131                                 len ? ", " : "", "blkzoned");
 132         if (f2fs_sb_has_extra_attr(sbi))
 133                 len += scnprintf(buf + len, PAGE_SIZE - len, "%s%s",
 134                                 len ? ", " : "", "extra_attr");
 135         if (f2fs_sb_has_project_quota(sbi))
 136                 len += scnprintf(buf + len, PAGE_SIZE - len, "%s%s",
 137                                 len ? ", " : "", "projquota");
 138         if (f2fs_sb_has_inode_chksum(sbi))
 139                 len += scnprintf(buf + len, PAGE_SIZE - len, "%s%s",
 140                                 len ? ", " : "", "inode_checksum");
 141         if (f2fs_sb_has_flexible_inline_xattr(sbi))
 142                 len += scnprintf(buf + len, PAGE_SIZE - len, "%s%s",
 143                                 len ? ", " : "", "flexible_inline_xattr");
 144         if (f2fs_sb_has_quota_ino(sbi))
 145                 len += scnprintf(buf + len, PAGE_SIZE - len, "%s%s",
 146                                 len ? ", " : "", "quota_ino");
 147         if (f2fs_sb_has_inode_crtime(sbi))
 148                 len += scnprintf(buf + len, PAGE_SIZE - len, "%s%s",
 149                                 len ? ", " : "", "inode_crtime");
 150         if (f2fs_sb_has_lost_found(sbi))
 151                 len += scnprintf(buf + len, PAGE_SIZE - len, "%s%s",
 152                                 len ? ", " : "", "lost_found");
 153         if (f2fs_sb_has_verity(sbi))
 154                 len += scnprintf(buf + len, PAGE_SIZE - len, "%s%s",
 155                                 len ? ", " : "", "verity");
 156         if (f2fs_sb_has_sb_chksum(sbi))
 157                 len += scnprintf(buf + len, PAGE_SIZE - len, "%s%s",
 158                                 len ? ", " : "", "sb_checksum");
 159         if (f2fs_sb_has_casefold(sbi))
 160                 len += scnprintf(buf + len, PAGE_SIZE - len, "%s%s",
 161                                 len ? ", " : "", "casefold");
 162         if (f2fs_sb_has_readonly(sbi))
 163                 len += scnprintf(buf + len, PAGE_SIZE - len, "%s%s",
 164                                 len ? ", " : "", "readonly");
 165         if (f2fs_sb_has_compression(sbi))
 166                 len += scnprintf(buf + len, PAGE_SIZE - len, "%s%s",
 167                                 len ? ", " : "", "compression");
 168         len += scnprintf(buf + len, PAGE_SIZE - len, "%s%s",
 169                                 len ? ", " : "", "pin_file");
 170         len += scnprintf(buf + len, PAGE_SIZE - len, "\n");
 171         return len;
 172 }
 173
 174 static ssize_t current_reserved_blocks_show(struct f2fs_attr *a,
 175                                         struct f2fs_sb_info *sbi, char *buf)
 176 {
 177         return sprintf(buf, "%u\n", sbi->current_reserved_blocks);
 178 }
 179
 180 static ssize_t unusable_show(struct f2fs_attr *a,
 181                 struct f2fs_sb_info *sbi, char *buf)
 182 {
 183         block_t unusable;
 184
 185         if (test_opt(sbi, DISABLE_CHECKPOINT))
 186                 unusable = sbi->unusable_block_count;
 187         else
 188                 unusable = f2fs_get_unusable_blocks(sbi);
 189         return sprintf(buf, "%llu\n", (unsigned long long)unusable);
 190 }
 191
 192 static ssize_t encoding_show(struct f2fs_attr *a,
 193                 struct f2fs_sb_info *sbi, char *buf)
 194 {
 195 #ifdef CONFIG_UNICODE
 196         struct super_block *sb = sbi->sb;
 197
 198         if (f2fs_sb_has_casefold(sbi))
 199                 return snprintf(buf, PAGE_SIZE, "%s (%d.%d.%d)\n",
 200                         sb->s_encoding->charset,
 201                         (sb->s_encoding->version >> 16) & 0xff,
 202                         (sb->s_encoding->version >> 8) & 0xff,
 203                         sb->s_encoding->version & 0xff);
 204 #endif
 205         return sprintf(buf, "(none)");
 206 }
 207
 208 static ssize_t mounted_time_sec_show(struct f2fs_attr *a,
 209                 struct f2fs_sb_info *sbi, char *buf)
 210 {
 211         return sprintf(buf, "%llu", SIT_I(sbi)->mounted_time);
 212 }
 213
 214 #ifdef CONFIG_F2FS_STAT_FS
 215 static ssize_t moved_blocks_foreground_show(struct f2fs_attr *a,
 216                                 struct f2fs_sb_info *sbi, char *buf)
 217 {
 218         struct f2fs_stat_info *si = F2FS_STAT(sbi);
 219
 220         return sprintf(buf, "%llu\n",
 221                 (unsigned long long)(si->tot_blks -
 222                         (si->bg_data_blks + si->bg_node_blks)));
 223 }
 224
 225 static ssize_t moved_blocks_background_show(struct f2fs_attr *a,
 226                                 struct f2fs_sb_info *sbi, char *buf)
 227 {
 228         struct f2fs_stat_info *si = F2FS_STAT(sbi);
 229
 230         return sprintf(buf, "%llu\n",
 231                 (unsigned long long)(si->bg_data_blks + si->bg_node_blks));
 232 }
 233
 234 static ssize_t avg_vblocks_show(struct f2fs_attr *a,
 235                 struct f2fs_sb_info *sbi, char *buf)
 236 {
 237         struct f2fs_stat_info *si = F2FS_STAT(sbi);
 238
 239         si->dirty_count = dirty_segments(sbi);
 240         f2fs_update_sit_info(sbi);
 241         return sprintf(buf, "%llu\n", (unsigned long long)(si->avg_vblocks));
 242 }
 243 #endif
 244
 245 static ssize_t main_blkaddr_show(struct f2fs_attr *a,
 246                                 struct f2fs_sb_info *sbi, char *buf)
 247 {
 248         return snprintf(buf, PAGE_SIZE, "%llu\n",
 249                         (unsigned long long)MAIN_BLKADDR(sbi));
 250 }
 251
 252 static ssize_t f2fs_sbi_show(struct f2fs_attr *a,
 253                         struct f2fs_sb_info *sbi, char *buf)
 254 {
 255         unsigned char *ptr = NULL;
 256         unsigned int *ui;
 257
 258         ptr = __struct_ptr(sbi, a->struct_type);
 259         if (!ptr)
 260                 return -EINVAL;
 261
 262         if (!strcmp(a->attr.name, "extension_list")) {
 263                 __u8 (*extlist)[F2FS_EXTENSION_LEN] =
 264                                         sbi->raw_super->extension_list;
 265                 int cold_count = le32_to_cpu(sbi->raw_super->extension_count);
 266                 int hot_count = sbi->raw_super->hot_ext_count;
 267                 int len = 0, i;
 268
 269                 len += scnprintf(buf + len, PAGE_SIZE - len,
 270                                                 "cold file extension:\n");
 271                 for (i = 0; i < cold_count; i++)
 272                         len += scnprintf(buf + len, PAGE_SIZE - len, "%s\n",
 273                                                                 extlist[i]);
 274
 275                 len += scnprintf(buf + len, PAGE_SIZE - len,
 276                                                 "hot file extension:\n");
 277                 for (i = cold_count; i < cold_count + hot_count; i++)
 278                         len += scnprintf(buf + len, PAGE_SIZE - len, "%s\n",
 279                                                                 extlist[i]);
 280                 return len;
 281         }
 282
 283         if (!strcmp(a->attr.name, "ckpt_thread_ioprio")) {
 284                 struct ckpt_req_control *cprc = &sbi->cprc_info;
 285                 int len = 0;
 286                 int class = IOPRIO_PRIO_CLASS(cprc->ckpt_thread_ioprio);
 287                 int data = IOPRIO_PRIO_DATA(cprc->ckpt_thread_ioprio);
 288
 289                 if (class == IOPRIO_CLASS_RT)
 290                         len += scnprintf(buf + len, PAGE_SIZE - len, "rt,");
 291                 else if (class == IOPRIO_CLASS_BE)
 292                         len += scnprintf(buf + len, PAGE_SIZE - len, "be,");
 293                 else
 294                         return -EINVAL;
 295
 296                 len += scnprintf(buf + len, PAGE_SIZE - len, "%d\n", data);
 297                 return len;
 298         }
 299
 300 #ifdef CONFIG_F2FS_FS_COMPRESSION
 301         if (!strcmp(a->attr.name, "compr_written_block"))
 302                 return sysfs_emit(buf, "%llu\n", sbi->compr_written_block);
 303
 304         if (!strcmp(a->attr.name, "compr_saved_block"))
 305                 return sysfs_emit(buf, "%llu\n", sbi->compr_saved_block);
 306
 307         if (!strcmp(a->attr.name, "compr_new_inode"))
 308                 return sysfs_emit(buf, "%u\n", sbi->compr_new_inode);
 309 #endif
 310
 311         if (!strcmp(a->attr.name, "gc_segment_mode"))
 312                 return sysfs_emit(buf, "%u\n", sbi->gc_segment_mode);
 313
 314         if (!strcmp(a->attr.name, "gc_reclaimed_segments")) {
 315                 return sysfs_emit(buf, "%u\n",
 316                         sbi->gc_reclaimed_segs[sbi->gc_segment_mode]);
 317         }
 318
 319         ui = (unsigned int *)(ptr + a->offset);
 320
 321         return sprintf(buf, "%u\n", *ui);
 322 }
 323
 324 static ssize_t __sbi_store(struct f2fs_attr *a,
 325                         struct f2fs_sb_info *sbi,
 326                         const char *buf, size_t count)
 327 {
 328         unsigned char *ptr;
 329         unsigned long t;
 330         unsigned int *ui;
 331         ssize_t ret;
 332
 333         ptr = __struct_ptr(sbi, a->struct_type);
 334         if (!ptr)
 335                 return -EINVAL;
 336
 337         if (!strcmp(a->attr.name, "extension_list")) {
 338                 const char *name = strim((char *)buf);
 339                 bool set = true, hot;
 340
 341                 if (!strncmp(name, "[h]", 3))
 342                         hot = true;
 343                 else if (!strncmp(name, "[c]", 3))
 344                         hot = false;
 345                 else
 346                         return -EINVAL;
 347
 348                 name += 3;
 349
 350                 if (*name == '!') {
 351                         name++;
 352                         set = false;
 353                 }
 354
 355                 if (!strlen(name) || strlen(name) >= F2FS_EXTENSION_LEN)
 356                         return -EINVAL;
 357
 358                 down_write(&sbi->sb_lock);
 359
 360                 ret = f2fs_update_extension_list(sbi, name, hot, set);
 361                 if (ret)
 362                         goto out;
 363
 364                 ret = f2fs_commit_super(sbi, false);
 365                 if (ret)
 366                         f2fs_update_extension_list(sbi, name, hot, !set);
 367 out:
 368                 up_write(&sbi->sb_lock);
 369                 return ret ? ret : count;
 370         }
 371
 372         if (!strcmp(a->attr.name, "ckpt_thread_ioprio")) {
 373                 const char *name = strim((char *)buf);
 374                 struct ckpt_req_control *cprc = &sbi->cprc_info;
 375                 int class;
 376                 long data;
 377                 int ret;
 378
 379                 if (!strncmp(name, "rt,", 3))
 380                         class = IOPRIO_CLASS_RT;
 381                 else if (!strncmp(name, "be,", 3))
 382                         class = IOPRIO_CLASS_BE;
 383                 else
 384                         return -EINVAL;
 385
 386                 name += 3;
 387                 ret = kstrtol(name, 10, &data);
 388                 if (ret)
 389                         return ret;
 390                 if (data >= IOPRIO_NR_LEVELS || data < 0)
 391                         return -EINVAL;
 392
 393                 cprc->ckpt_thread_ioprio = IOPRIO_PRIO_VALUE(class, data);
 394                 if (test_opt(sbi, MERGE_CHECKPOINT)) {
 395                         ret = set_task_ioprio(cprc->f2fs_issue_ckpt,
 396                                         cprc->ckpt_thread_ioprio);
 397                         if (ret)
 398                                 return ret;
 399                 }
 400
 401                 return count;
 402         }
 403
 404         ui = (unsigned int *)(ptr + a->offset);
 405
 406         ret = kstrtoul(skip_spaces(buf), 0, &t);
 407         if (ret < 0)
 408                 return ret;
 409 #ifdef CONFIG_F2FS_FAULT_INJECTION
 410         if (a->struct_type == FAULT_INFO_TYPE && t >= (1 << FAULT_MAX))
 411                 return -EINVAL;
 412         if (a->struct_type == FAULT_INFO_RATE && t >= UINT_MAX)
 413                 return -EINVAL;
 414 #endif
 415         if (a->struct_type == RESERVED_BLOCKS) {
 416                 spin_lock(&sbi->stat_lock);
 417                 if (t > (unsigned long)(sbi->user_block_count -
 418                                 F2FS_OPTION(sbi).root_reserved_blocks)) {
 419                         spin_unlock(&sbi->stat_lock);
 420                         return -EINVAL;
 421                 }
 422                 *ui = t;
 423                 sbi->current_reserved_blocks = min(sbi->reserved_blocks,
 424                                 sbi->user_block_count - valid_user_blocks(sbi));
 425                 spin_unlock(&sbi->stat_lock);
 426                 return count;
 427         }
 428
 429         if (!strcmp(a->attr.name, "discard_granularity")) {
 430                 if (t == 0 || t > MAX_PLIST_NUM)
 431                         return -EINVAL;
 432                 if (!f2fs_block_unit_discard(sbi))
 433                         return -EINVAL;
 434                 if (t == *ui)
 435                         return count;
 436                 *ui = t;
 437                 return count;
 438         }
 439
 440         if (!strcmp(a->attr.name, "migration_granularity")) {
 441                 if (t == 0 || t > sbi->segs_per_sec)
 442                         return -EINVAL;
 443         }
 444
 445         if (!strcmp(a->attr.name, "trim_sections"))
 446                 return -EINVAL;
 447
 448         if (!strcmp(a->attr.name, "gc_urgent")) {
 449                 if (t == 0) {
 450                         sbi->gc_mode = GC_NORMAL;
 451                 } else if (t == 1) {
 452                         sbi->gc_mode = GC_URGENT_HIGH;
 453                         if (sbi->gc_thread) {
 454                                 sbi->gc_thread->gc_wake = 1;
 455                                 wake_up_interruptible_all(
 456                                         &sbi->gc_thread->gc_wait_queue_head);
 457                                 wake_up_discard_thread(sbi, true);
 458                         }
 459                 } else if (t == 2) {
 460                         sbi->gc_mode = GC_URGENT_LOW;
 461                 } else {
 462                         return -EINVAL;
 463                 }
 464                 return count;
 465         }
 466         if (!strcmp(a->attr.name, "gc_idle")) {
 467                 if (t == GC_IDLE_CB) {
 468                         sbi->gc_mode = GC_IDLE_CB;
 469                 } else if (t == GC_IDLE_GREEDY) {
 470                         sbi->gc_mode = GC_IDLE_GREEDY;
 471                 } else if (t == GC_IDLE_AT) {
 472                         if (!sbi->am.atgc_enabled)
 473                                 return -EINVAL;
 474                         sbi->gc_mode = GC_AT;
 475                 } else {
 476                         sbi->gc_mode = GC_NORMAL;
 477                 }
 478                 return count;
 479         }
 480
 481 #ifdef CONFIG_F2FS_IOSTAT
 482         if (!strcmp(a->attr.name, "iostat_enable")) {
 483                 sbi->iostat_enable = !!t;
 484                 if (!sbi->iostat_enable)
 485                         f2fs_reset_iostat(sbi);
 486                 return count;
 487         }
 488
 489         if (!strcmp(a->attr.name, "iostat_period_ms")) {
 490                 if (t < MIN_IOSTAT_PERIOD_MS || t > MAX_IOSTAT_PERIOD_MS)
 491                         return -EINVAL;
 492                 spin_lock(&sbi->iostat_lock);
 493                 sbi->iostat_period_ms = (unsigned int)t;
 494                 spin_unlock(&sbi->iostat_lock);
 495                 return count;
 496         }
 497 #endif
 498
 499 #ifdef CONFIG_F2FS_FS_COMPRESSION
 500         if (!strcmp(a->attr.name, "compr_written_block") ||
 501                 !strcmp(a->attr.name, "compr_saved_block")) {
 502                 if (t != 0)
 503                         return -EINVAL;
 504                 sbi->compr_written_block = 0;
 505                 sbi->compr_saved_block = 0;
 506                 return count;
 507         }
 508
 509         if (!strcmp(a->attr.name, "compr_new_inode")) {
 510                 if (t != 0)
 511                         return -EINVAL;
 512                 sbi->compr_new_inode = 0;
 513                 return count;
 514         }
 515 #endif
 516
 517         if (!strcmp(a->attr.name, "atgc_candidate_ratio")) {
 518                 if (t > 100)
 519                         return -EINVAL;
 520                 sbi->am.candidate_ratio = t;
 521                 return count;
 522         }
 523
 524         if (!strcmp(a->attr.name, "atgc_age_weight")) {
 525                 if (t > 100)
 526                         return -EINVAL;
 527                 sbi->am.age_weight = t;
 528                 return count;
 529         }
 530
 531         if (!strcmp(a->attr.name, "gc_segment_mode")) {
 532                 if (t < MAX_GC_MODE)
 533                         sbi->gc_segment_mode = t;
 534                 else
 535                         return -EINVAL;
 536                 return count;
 537         }
 538
 539         if (!strcmp(a->attr.name, "gc_reclaimed_segments")) {
 540                 if (t != 0)
 541                         return -EINVAL;
 542                 sbi->gc_reclaimed_segs[sbi->gc_segment_mode] = 0;
 543                 return count;
 544         }
 545
 546         if (!strcmp(a->attr.name, "seq_file_ra_mul")) {
 547                 if (t >= MIN_RA_MUL && t <= MAX_RA_MUL)
 548                         sbi->seq_file_ra_mul = t;
 549                 else
 550                         return -EINVAL;
 551                 return count;
 552         }
 553
 554         *ui = (unsigned int)t;
 555
 556         return count;
 557 }
 558
 559 static ssize_t f2fs_sbi_store(struct f2fs_attr *a,
 560                         struct f2fs_sb_info *sbi,
 561                         const char *buf, size_t count)
 562 {
 563         ssize_t ret;
 564         bool gc_entry = (!strcmp(a->attr.name, "gc_urgent") ||
 565                                         a->struct_type == GC_THREAD);
 566
 567         if (gc_entry) {
 568                 if (!down_read_trylock(&sbi->sb->s_umount))
 569                         return -EAGAIN;
 570         }
 571         ret = __sbi_store(a, sbi, buf, count);
 572         if (gc_entry)
 573                 up_read(&sbi->sb->s_umount);
 574
 575         return ret;
 576 }
 577
 578 static ssize_t f2fs_attr_show(struct kobject *kobj,
 579                                 struct attribute *attr, char *buf)
 580 {
 581         struct f2fs_sb_info *sbi = container_of(kobj, struct f2fs_sb_info,
 582                                                                 s_kobj);
 583         struct f2fs_attr *a = container_of(attr, struct f2fs_attr, attr);
 584
 585         return a->show ? a->show(a, sbi, buf) : 0;
 586 }
 587
 588 static ssize_t f2fs_attr_store(struct kobject *kobj, struct attribute *attr,
 589                                                 const char *buf, size_t len)
 590 {
 591         struct f2fs_sb_info *sbi = container_of(kobj, struct f2fs_sb_info,
 592                                                                         s_kobj);
 593         struct f2fs_attr *a = container_of(attr, struct f2fs_attr, attr);
 594
 595         return a->store ? a->store(a, sbi, buf, len) : 0;
 596 }
 597
 598 static void f2fs_sb_release(struct kobject *kobj)
 599 {
 600         struct f2fs_sb_info *sbi = container_of(kobj, struct f2fs_sb_info,
 601                                                                 s_kobj);
 602         complete(&sbi->s_kobj_unregister);
 603 }
 604
 605 /*
 606  * Note that there are three feature list entries:
 607  * 1) /sys/fs/f2fs/features
 608  *   : shows runtime features supported by in-kernel f2fs along with Kconfig.
 609  *     - ref. F2FS_FEATURE_RO_ATTR()
 610  *
 611  * 2) /sys/fs/f2fs/$s_id/features <deprecated>
 612  *   : shows on-disk features enabled by mkfs.f2fs, used for old kernels. This
 613  *     won't add new feature anymore, and thus, users should check entries in 3)
 614  *     instead of this 2).
 615  *
 616  * 3) /sys/fs/f2fs/$s_id/feature_list
 617  *   : shows on-disk features enabled by mkfs.f2fs per instance, which follows
 618  *     sysfs entry rule where each entry should expose single value.
 619  *     This list covers old feature list provided by 2) and beyond. Therefore,
 620  *     please add new on-disk feature in this list only.
 621  *     - ref. F2FS_SB_FEATURE_RO_ATTR()
 622  */
 623 static ssize_t f2fs_feature_show(struct f2fs_attr *a,
 624                 struct f2fs_sb_info *sbi, char *buf)
 625 {
 626         return sprintf(buf, "supported\n");
 627 }
 628
 629 #define F2FS_FEATURE_RO_ATTR(_name)                             \
 630 static struct f2fs_attr f2fs_attr_##_name = {                   \
 631         .attr = {.name = __stringify(_name), .mode = 0444 },    \
 632         .show   = f2fs_feature_show,                            \
 633 }
 634
 635 static ssize_t f2fs_sb_feature_show(struct f2fs_attr *a,
 636                 struct f2fs_sb_info *sbi, char *buf)
 637 {
 638         if (F2FS_HAS_FEATURE(sbi, a->id))
 639                 return sprintf(buf, "supported\n");
 640         return sprintf(buf, "unsupported\n");
 641 }
 642
 643 #define F2FS_SB_FEATURE_RO_ATTR(_name, _feat)                   \
 644 static struct f2fs_attr f2fs_attr_sb_##_name = {                \
 645         .attr = {.name = __stringify(_name), .mode = 0444 },    \
 646         .show   = f2fs_sb_feature_show,                         \
 647         .id     = F2FS_FEATURE_##_feat,                         \
 648 }
 649
 650 #define F2FS_ATTR_OFFSET(_struct_type, _name, _mode, _show, _store, _offset) \
 651 static struct f2fs_attr f2fs_attr_##_name = {                   \
 652         .attr = {.name = __stringify(_name), .mode = _mode },   \
 653         .show   = _show,                                        \
 654         .store  = _store,                                       \
 655         .struct_type = _struct_type,                            \
 656         .offset = _offset                                       \
 657 }
 658
 659 #define F2FS_RW_ATTR(struct_type, struct_name, name, elname)    \
 660         F2FS_ATTR_OFFSET(struct_type, name, 0644,               \
 661                 f2fs_sbi_show, f2fs_sbi_store,                  \
 662                 offsetof(struct struct_name, elname))
 663
 664 #define F2FS_GENERAL_RO_ATTR(name) \
 665 static struct f2fs_attr f2fs_attr_##name = __ATTR(name, 0444, name##_show, NULL)
 666
 667 #define F2FS_STAT_ATTR(_struct_type, _struct_name, _name, _elname)      \
 668 static struct f2fs_attr f2fs_attr_##_name = {                   \
 669         .attr = {.name = __stringify(_name), .mode = 0444 },    \
 670         .show = f2fs_sbi_show,                                  \
 671         .struct_type = _struct_type,                            \
 672         .offset = offsetof(struct _struct_name, _elname),       \
 673 }
 674
 675 F2FS_RW_ATTR(GC_THREAD, f2fs_gc_kthread, gc_urgent_sleep_time,
 676                                                         urgent_sleep_time);
 677 F2FS_RW_ATTR(GC_THREAD, f2fs_gc_kthread, gc_min_sleep_time, min_sleep_time);
 678 F2FS_RW_ATTR(GC_THREAD, f2fs_gc_kthread, gc_max_sleep_time, max_sleep_time);
 679 F2FS_RW_ATTR(GC_THREAD, f2fs_gc_kthread, gc_no_gc_sleep_time, no_gc_sleep_time);
 680 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, gc_idle, gc_mode);
 681 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, gc_urgent, gc_mode);
 682 F2FS_RW_ATTR(SM_INFO, f2fs_sm_info, reclaim_segments, rec_prefree_segments);
 683 F2FS_RW_ATTR(DCC_INFO, discard_cmd_control, max_small_discards, max_discards);
 684 F2FS_RW_ATTR(DCC_INFO, discard_cmd_control, discard_granularity, discard_granularity);
 685 F2FS_RW_ATTR(RESERVED_BLOCKS, f2fs_sb_info, reserved_blocks, reserved_blocks);
 686 F2FS_RW_ATTR(SM_INFO, f2fs_sm_info, batched_trim_sections, trim_sections);
 687 F2FS_RW_ATTR(SM_INFO, f2fs_sm_info, ipu_policy, ipu_policy);
 688 F2FS_RW_ATTR(SM_INFO, f2fs_sm_info, min_ipu_util, min_ipu_util);
 689 F2FS_RW_ATTR(SM_INFO, f2fs_sm_info, min_fsync_blocks, min_fsync_blocks);
 690 F2FS_RW_ATTR(SM_INFO, f2fs_sm_info, min_seq_blocks, min_seq_blocks);
 691 F2FS_RW_ATTR(SM_INFO, f2fs_sm_info, min_hot_blocks, min_hot_blocks);
 692 F2FS_RW_ATTR(SM_INFO, f2fs_sm_info, min_ssr_sections, min_ssr_sections);
 693 F2FS_RW_ATTR(NM_INFO, f2fs_nm_info, ram_thresh, ram_thresh);
 694 F2FS_RW_ATTR(NM_INFO, f2fs_nm_info, ra_nid_pages, ra_nid_pages);
 695 F2FS_RW_ATTR(NM_INFO, f2fs_nm_info, dirty_nats_ratio, dirty_nats_ratio);
 696 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, max_victim_search, max_victim_search);
 697 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, migration_granularity, migration_granularity);
 698 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, dir_level, dir_level);
 699 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, cp_interval, interval_time[CP_TIME]);
 700 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, idle_interval, interval_time[REQ_TIME]);
 701 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, discard_idle_interval,
 702                                         interval_time[DISCARD_TIME]);
 703 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, gc_idle_interval, interval_time[GC_TIME]);
 704 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info,
 705                 umount_discard_timeout, interval_time[UMOUNT_DISCARD_TIMEOUT]);
 706 #ifdef CONFIG_F2FS_IOSTAT
 707 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, iostat_enable, iostat_enable);
 708 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, iostat_period_ms, iostat_period_ms);
 709 #endif
 710 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, readdir_ra, readdir_ra);
 711 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, max_io_bytes, max_io_bytes);
 712 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, gc_pin_file_thresh, gc_pin_file_threshold);
 713 F2FS_RW_ATTR(F2FS_SBI, f2fs_super_block, extension_list, extension_list);
 714 #ifdef CONFIG_F2FS_FAULT_INJECTION
 715 F2FS_RW_ATTR(FAULT_INFO_RATE, f2fs_fault_info, inject_rate, inject_rate);
 716 F2FS_RW_ATTR(FAULT_INFO_TYPE, f2fs_fault_info, inject_type, inject_type);
 717 #endif
 718 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, data_io_flag, data_io_flag);
 719 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, node_io_flag, node_io_flag);
 720 F2FS_RW_ATTR(CPRC_INFO, ckpt_req_control, ckpt_thread_ioprio, ckpt_thread_ioprio);
 721 F2FS_GENERAL_RO_ATTR(dirty_segments);
 722 F2FS_GENERAL_RO_ATTR(free_segments);
 723 F2FS_GENERAL_RO_ATTR(ovp_segments);
 724 F2FS_GENERAL_RO_ATTR(lifetime_write_kbytes);
 725 F2FS_GENERAL_RO_ATTR(features);
 726 F2FS_GENERAL_RO_ATTR(current_reserved_blocks);
 727 F2FS_GENERAL_RO_ATTR(unusable);
 728 F2FS_GENERAL_RO_ATTR(encoding);
 729 F2FS_GENERAL_RO_ATTR(mounted_time_sec);
 730 F2FS_GENERAL_RO_ATTR(main_blkaddr);
 731 #ifdef CONFIG_F2FS_STAT_FS
 732 F2FS_STAT_ATTR(STAT_INFO, f2fs_stat_info, cp_foreground_calls, cp_count);
 733 F2FS_STAT_ATTR(STAT_INFO, f2fs_stat_info, cp_background_calls, bg_cp_count);
 734 F2FS_STAT_ATTR(STAT_INFO, f2fs_stat_info, gc_foreground_calls, call_count);
 735 F2FS_STAT_ATTR(STAT_INFO, f2fs_stat_info, gc_background_calls, bg_gc);
 736 F2FS_GENERAL_RO_ATTR(moved_blocks_background);
 737 F2FS_GENERAL_RO_ATTR(moved_blocks_foreground);
 738 F2FS_GENERAL_RO_ATTR(avg_vblocks);
 739 #endif
 740
 741 #ifdef CONFIG_FS_ENCRYPTION
 742 F2FS_FEATURE_RO_ATTR(encryption);
 743 F2FS_FEATURE_RO_ATTR(test_dummy_encryption_v2);
 744 #ifdef CONFIG_UNICODE
 745 F2FS_FEATURE_RO_ATTR(encrypted_casefold);
 746 #endif
 747 #endif /* CONFIG_FS_ENCRYPTION */
 748 #ifdef CONFIG_BLK_DEV_ZONED
 749 F2FS_FEATURE_RO_ATTR(block_zoned);
 750 #endif
 751 F2FS_FEATURE_RO_ATTR(atomic_write);
 752 F2FS_FEATURE_RO_ATTR(extra_attr);
 753 F2FS_FEATURE_RO_ATTR(project_quota);
 754 F2FS_FEATURE_RO_ATTR(inode_checksum);
 755 F2FS_FEATURE_RO_ATTR(flexible_inline_xattr);
 756 F2FS_FEATURE_RO_ATTR(quota_ino);
 757 F2FS_FEATURE_RO_ATTR(inode_crtime);
 758 F2FS_FEATURE_RO_ATTR(lost_found);
 759 #ifdef CONFIG_FS_VERITY
 760 F2FS_FEATURE_RO_ATTR(verity);
 761 #endif
 762 F2FS_FEATURE_RO_ATTR(sb_checksum);
 763 #ifdef CONFIG_UNICODE
 764 F2FS_FEATURE_RO_ATTR(casefold);
 765 #endif
 766 F2FS_FEATURE_RO_ATTR(readonly);
 767 #ifdef CONFIG_F2FS_FS_COMPRESSION
 768 F2FS_FEATURE_RO_ATTR(compression);
 769 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, compr_written_block, compr_written_block);
 770 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, compr_saved_block, compr_saved_block);
 771 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, compr_new_inode, compr_new_inode);
 772 #endif
 773 F2FS_FEATURE_RO_ATTR(pin_file);
 774
 775 /* For ATGC */
 776 F2FS_RW_ATTR(ATGC_INFO, atgc_management, atgc_candidate_ratio, candidate_ratio);
 777 F2FS_RW_ATTR(ATGC_INFO, atgc_management, atgc_candidate_count, max_candidate_count);
 778 F2FS_RW_ATTR(ATGC_INFO, atgc_management, atgc_age_weight, age_weight);
 779 F2FS_RW_ATTR(ATGC_INFO, atgc_management, atgc_age_threshold, age_threshold);
 780
 781 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, seq_file_ra_mul, seq_file_ra_mul);
 782 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, gc_segment_mode, gc_segment_mode);
 783 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, gc_reclaimed_segments, gc_reclaimed_segs);
 784
 785 #define ATTR_LIST(name) (&f2fs_attr_##name.attr)
 786 static struct attribute *f2fs_attrs[] = {
 787         ATTR_LIST(gc_urgent_sleep_time),
 788         ATTR_LIST(gc_min_sleep_time),
 789         ATTR_LIST(gc_max_sleep_time),
 790         ATTR_LIST(gc_no_gc_sleep_time),
 791         ATTR_LIST(gc_idle),
 792         ATTR_LIST(gc_urgent),
 793         ATTR_LIST(reclaim_segments),
 794         ATTR_LIST(main_blkaddr),
 795         ATTR_LIST(max_small_discards),
 796         ATTR_LIST(discard_granularity),
 797         ATTR_LIST(batched_trim_sections),
 798         ATTR_LIST(ipu_policy),
 799         ATTR_LIST(min_ipu_util),
 800         ATTR_LIST(min_fsync_blocks),
 801         ATTR_LIST(min_seq_blocks),
 802         ATTR_LIST(min_hot_blocks),
 803         ATTR_LIST(min_ssr_sections),
 804         ATTR_LIST(max_victim_search),
 805         ATTR_LIST(migration_granularity),
 806         ATTR_LIST(dir_level),
 807         ATTR_LIST(ram_thresh),
 808         ATTR_LIST(ra_nid_pages),
 809         ATTR_LIST(dirty_nats_ratio),
 810         ATTR_LIST(cp_interval),
 811         ATTR_LIST(idle_interval),
 812         ATTR_LIST(discard_idle_interval),
 813         ATTR_LIST(gc_idle_interval),
 814         ATTR_LIST(umount_discard_timeout),
 815 #ifdef CONFIG_F2FS_IOSTAT
 816         ATTR_LIST(iostat_enable),
 817         ATTR_LIST(iostat_period_ms),
 818 #endif
 819         ATTR_LIST(readdir_ra),
 820         ATTR_LIST(max_io_bytes),
 821         ATTR_LIST(gc_pin_file_thresh),
 822         ATTR_LIST(extension_list),
 823 #ifdef CONFIG_F2FS_FAULT_INJECTION
 824         ATTR_LIST(inject_rate),
 825         ATTR_LIST(inject_type),
 826 #endif
 827         ATTR_LIST(data_io_flag),
 828         ATTR_LIST(node_io_flag),
 829         ATTR_LIST(ckpt_thread_ioprio),
 830         ATTR_LIST(dirty_segments),
 831         ATTR_LIST(free_segments),
 832         ATTR_LIST(ovp_segments),
 833         ATTR_LIST(unusable),
 834         ATTR_LIST(lifetime_write_kbytes),
 835         ATTR_LIST(features),
 836         ATTR_LIST(reserved_blocks),
 837         ATTR_LIST(current_reserved_blocks),
 838         ATTR_LIST(encoding),
 839         ATTR_LIST(mounted_time_sec),
 840 #ifdef CONFIG_F2FS_STAT_FS
 841         ATTR_LIST(cp_foreground_calls),
 842         ATTR_LIST(cp_background_calls),
 843         ATTR_LIST(gc_foreground_calls),
 844         ATTR_LIST(gc_background_calls),
 845         ATTR_LIST(moved_blocks_foreground),
 846         ATTR_LIST(moved_blocks_background),
 847         ATTR_LIST(avg_vblocks),
 848 #endif
 849 #ifdef CONFIG_F2FS_FS_COMPRESSION
 850         ATTR_LIST(compr_written_block),
 851         ATTR_LIST(compr_saved_block),
 852         ATTR_LIST(compr_new_inode),
 853 #endif
 854         /* For ATGC */
 855         ATTR_LIST(atgc_candidate_ratio),
 856         ATTR_LIST(atgc_candidate_count),
 857         ATTR_LIST(atgc_age_weight),
 858         ATTR_LIST(atgc_age_threshold),
 859         ATTR_LIST(seq_file_ra_mul),
 860         ATTR_LIST(gc_segment_mode),
 861         ATTR_LIST(gc_reclaimed_segments),
 862         NULL,
 863 };
 864 ATTRIBUTE_GROUPS(f2fs);
 865
 866 static struct attribute *f2fs_feat_attrs[] = {
 867 #ifdef CONFIG_FS_ENCRYPTION
 868         ATTR_LIST(encryption),
 869         ATTR_LIST(test_dummy_encryption_v2),
 870 #ifdef CONFIG_UNICODE
 871         ATTR_LIST(encrypted_casefold),
 872 #endif
 873 #endif /* CONFIG_FS_ENCRYPTION */
 874 #ifdef CONFIG_BLK_DEV_ZONED
 875         ATTR_LIST(block_zoned),
 876 #endif
 877         ATTR_LIST(atomic_write),
 878         ATTR_LIST(extra_attr),
 879         ATTR_LIST(project_quota),
 880         ATTR_LIST(inode_checksum),
 881         ATTR_LIST(flexible_inline_xattr),
 882         ATTR_LIST(quota_ino),
 883         ATTR_LIST(inode_crtime),
 884         ATTR_LIST(lost_found),
 885 #ifdef CONFIG_FS_VERITY
 886         ATTR_LIST(verity),
 887 #endif
 888         ATTR_LIST(sb_checksum),
 889 #ifdef CONFIG_UNICODE
 890         ATTR_LIST(casefold),
 891 #endif
 892         ATTR_LIST(readonly),
 893 #ifdef CONFIG_F2FS_FS_COMPRESSION
 894         ATTR_LIST(compression),
 895 #endif
 896         ATTR_LIST(pin_file),
 897         NULL,
 898 };
 899 ATTRIBUTE_GROUPS(f2fs_feat);
 900
 901 F2FS_GENERAL_RO_ATTR(sb_status);
 902 static struct attribute *f2fs_stat_attrs[] = {
 903         ATTR_LIST(sb_status),
 904         NULL,
 905 };
 906 ATTRIBUTE_GROUPS(f2fs_stat);
 907
 908 F2FS_SB_FEATURE_RO_ATTR(encryption, ENCRYPT);
 909 F2FS_SB_FEATURE_RO_ATTR(block_zoned, BLKZONED);
 910 F2FS_SB_FEATURE_RO_ATTR(extra_attr, EXTRA_ATTR);
 911 F2FS_SB_FEATURE_RO_ATTR(project_quota, PRJQUOTA);
 912 F2FS_SB_FEATURE_RO_ATTR(inode_checksum, INODE_CHKSUM);
 913 F2FS_SB_FEATURE_RO_ATTR(flexible_inline_xattr, FLEXIBLE_INLINE_XATTR);
 914 F2FS_SB_FEATURE_RO_ATTR(quota_ino, QUOTA_INO);
 915 F2FS_SB_FEATURE_RO_ATTR(inode_crtime, INODE_CRTIME);
 916 F2FS_SB_FEATURE_RO_ATTR(lost_found, LOST_FOUND);
 917 F2FS_SB_FEATURE_RO_ATTR(verity, VERITY);
 918 F2FS_SB_FEATURE_RO_ATTR(sb_checksum, SB_CHKSUM);
 919 F2FS_SB_FEATURE_RO_ATTR(casefold, CASEFOLD);
 920 F2FS_SB_FEATURE_RO_ATTR(compression, COMPRESSION);
 921 F2FS_SB_FEATURE_RO_ATTR(readonly, RO);
 922
 923 static struct attribute *f2fs_sb_feat_attrs[] = {
 924         ATTR_LIST(sb_encryption),
 925         ATTR_LIST(sb_block_zoned),
 926         ATTR_LIST(sb_extra_attr),
 927         ATTR_LIST(sb_project_quota),
 928         ATTR_LIST(sb_inode_checksum),
 929         ATTR_LIST(sb_flexible_inline_xattr),
 930         ATTR_LIST(sb_quota_ino),
 931         ATTR_LIST(sb_inode_crtime),
 932         ATTR_LIST(sb_lost_found),
 933         ATTR_LIST(sb_verity),
 934         ATTR_LIST(sb_sb_checksum),
 935         ATTR_LIST(sb_casefold),
 936         ATTR_LIST(sb_compression),
 937         ATTR_LIST(sb_readonly),
 938         NULL,
 939 };
 940 ATTRIBUTE_GROUPS(f2fs_sb_feat);
 941
 942 static const struct sysfs_ops f2fs_attr_ops = {
 943         .show   = f2fs_attr_show,
 944         .store  = f2fs_attr_store,
 945 };
 946
 947 static struct kobj_type f2fs_sb_ktype = {
 948         .default_groups = f2fs_groups,
 949         .sysfs_ops      = &f2fs_attr_ops,
 950         .release        = f2fs_sb_release,
 951 };
 952
 953 static struct kobj_type f2fs_ktype = {
 954         .sysfs_ops      = &f2fs_attr_ops,
 955 };
 956
 957 static struct kset f2fs_kset = {
 958         .kobj   = {.ktype = &f2fs_ktype},
 959 };
 960
 961 static struct kobj_type f2fs_feat_ktype = {
 962         .default_groups = f2fs_feat_groups,
 963         .sysfs_ops      = &f2fs_attr_ops,
 964 };
 965
 966 static struct kobject f2fs_feat = {
 967         .kset   = &f2fs_kset,
 968 };
 969
 970 static ssize_t f2fs_stat_attr_show(struct kobject *kobj,
 971                                 struct attribute *attr, char *buf)
 972 {
 973         struct f2fs_sb_info *sbi = container_of(kobj, struct f2fs_sb_info,
 974                                                                 s_stat_kobj);
 975         struct f2fs_attr *a = container_of(attr, struct f2fs_attr, attr);
 976
 977         return a->show ? a->show(a, sbi, buf) : 0;
 978 }
 979
 980 static ssize_t f2fs_stat_attr_store(struct kobject *kobj, struct attribute *attr,
 981                                                 const char *buf, size_t len)
 982 {
 983         struct f2fs_sb_info *sbi = container_of(kobj, struct f2fs_sb_info,
 984                                                                 s_stat_kobj);
 985         struct f2fs_attr *a = container_of(attr, struct f2fs_attr, attr);
 986
 987         return a->store ? a->store(a, sbi, buf, len) : 0;
 988 }
 989
 990 static void f2fs_stat_kobj_release(struct kobject *kobj)
 991 {
 992         struct f2fs_sb_info *sbi = container_of(kobj, struct f2fs_sb_info,
 993                                                                 s_stat_kobj);
 994         complete(&sbi->s_stat_kobj_unregister);
 995 }
 996
 997 static const struct sysfs_ops f2fs_stat_attr_ops = {
 998         .show   = f2fs_stat_attr_show,
 999         .store  = f2fs_stat_attr_store,
1000 };
1001
1002 static struct kobj_type f2fs_stat_ktype = {
1003         .default_groups = f2fs_stat_groups,
1004         .sysfs_ops      = &f2fs_stat_attr_ops,
1005         .release        = f2fs_stat_kobj_release,
1006 };
1007
1008 static ssize_t f2fs_sb_feat_attr_show(struct kobject *kobj,
1009                                 struct attribute *attr, char *buf)
1010 {
1011         struct f2fs_sb_info *sbi = container_of(kobj, struct f2fs_sb_info,
1012                                                         s_feature_list_kobj);
1013         struct f2fs_attr *a = container_of(attr, struct f2fs_attr, attr);
1014
1015         return a->show ? a->show(a, sbi, buf) : 0;
1016 }
1017
1018 static void f2fs_feature_list_kobj_release(struct kobject *kobj)
1019 {
1020         struct f2fs_sb_info *sbi = container_of(kobj, struct f2fs_sb_info,
1021                                                         s_feature_list_kobj);
1022         complete(&sbi->s_feature_list_kobj_unregister);
1023 }
1024
1025 static const struct sysfs_ops f2fs_feature_list_attr_ops = {
1026         .show   = f2fs_sb_feat_attr_show,
1027 };
1028
1029 static struct kobj_type f2fs_feature_list_ktype = {
1030         .default_groups = f2fs_sb_feat_groups,
1031         .sysfs_ops      = &f2fs_feature_list_attr_ops,
1032         .release        = f2fs_feature_list_kobj_release,
1033 };
1034
1035 static int __maybe_unused segment_info_seq_show(struct seq_file *seq,
1036                                                 void *offset)
1037 {
1038         struct super_block *sb = seq->private;
1039         struct f2fs_sb_info *sbi = F2FS_SB(sb);
1040         unsigned int total_segs =
1041                         le32_to_cpu(sbi->raw_super->segment_count_main);
1042         int i;
1043
1044         seq_puts(seq, "format: segment_type|valid_blocks\n"
1045                 "segment_type(0:HD, 1:WD, 2:CD, 3:HN, 4:WN, 5:CN)\n");
1046
1047         for (i = 0; i < total_segs; i++) {
1048                 struct seg_entry *se = get_seg_entry(sbi, i);
1049
1050                 if ((i % 10) == 0)
1051                         seq_printf(seq, "%-10d", i);
1052                 seq_printf(seq, "%d|%-3u", se->type, se->valid_blocks);
1053                 if ((i % 10) == 9 || i == (total_segs - 1))
1054                         seq_putc(seq, '\n');
1055                 else
1056                         seq_putc(seq, ' ');
1057         }
1058
1059         return 0;
1060 }
1061
1062 static int __maybe_unused segment_bits_seq_show(struct seq_file *seq,
1063                                                 void *offset)
1064 {
1065         struct super_block *sb = seq->private;
1066         struct f2fs_sb_info *sbi = F2FS_SB(sb);
1067         unsigned int total_segs =
1068                         le32_to_cpu(sbi->raw_super->segment_count_main);
1069         int i, j;
1070
1071         seq_puts(seq, "format: segment_type|valid_blocks|bitmaps\n"
1072                 "segment_type(0:HD, 1:WD, 2:CD, 3:HN, 4:WN, 5:CN)\n");
1073
1074         for (i = 0; i < total_segs; i++) {
1075                 struct seg_entry *se = get_seg_entry(sbi, i);
1076
1077                 seq_printf(seq, "%-10d", i);
1078                 seq_printf(seq, "%d|%-3u|", se->type, se->valid_blocks);
1079                 for (j = 0; j < SIT_VBLOCK_MAP_SIZE; j++)
1080                         seq_printf(seq, " %.2x", se->cur_valid_map[j]);
1081                 seq_putc(seq, '\n');
1082         }
1083         return 0;
1084 }
1085
1086 static int __maybe_unused victim_bits_seq_show(struct seq_file *seq,
1087                                                 void *offset)
1088 {
1089         struct super_block *sb = seq->private;
1090         struct f2fs_sb_info *sbi = F2FS_SB(sb);
1091         struct dirty_seglist_info *dirty_i = DIRTY_I(sbi);
1092         int i;
1093
1094         seq_puts(seq, "format: victim_secmap bitmaps\n");
1095
1096         for (i = 0; i < MAIN_SECS(sbi); i++) {
1097                 if ((i % 10) == 0)
1098                         seq_printf(seq, "%-10d", i);
1099                 seq_printf(seq, "%d", test_bit(i, dirty_i->victim_secmap) ? 1 : 0);
1100                 if ((i % 10) == 9 || i == (MAIN_SECS(sbi) - 1))
1101                         seq_putc(seq, '\n');
1102                 else
1103                         seq_putc(seq, ' ');
1104         }
1105         return 0;
1106 }
1107
1108 int __init f2fs_init_sysfs(void)
1109 {
1110         int ret;
1111
1112         kobject_set_name(&f2fs_kset.kobj, "f2fs");
1113         f2fs_kset.kobj.parent = fs_kobj;
1114         ret = kset_register(&f2fs_kset);
1115         if (ret)
1116                 return ret;
1117
1118         ret = kobject_init_and_add(&f2fs_feat, &f2fs_feat_ktype,
1119                                    NULL, "features");
1120         if (ret) {
1121                 kobject_put(&f2fs_feat);
1122                 kset_unregister(&f2fs_kset);
1123         } else {
1124                 f2fs_proc_root = proc_mkdir("fs/f2fs", NULL);
1125         }
1126         return ret;
1127 }
1128
1129 void f2fs_exit_sysfs(void)
1130 {
1131         kobject_put(&f2fs_feat);
1132         kset_unregister(&f2fs_kset);
1133         remove_proc_entry("fs/f2fs", NULL);
1134         f2fs_proc_root = NULL;
1135 }
1136
1137 int f2fs_register_sysfs(struct f2fs_sb_info *sbi)
1138 {
1139         struct super_block *sb = sbi->sb;
1140         int err;
1141
1142         sbi->s_kobj.kset = &f2fs_kset;
1143         init_completion(&sbi->s_kobj_unregister);
1144         err = kobject_init_and_add(&sbi->s_kobj, &f2fs_sb_ktype, NULL,
1145                                 "%s", sb->s_id);
1146         if (err)
1147                 goto put_sb_kobj;
1148
1149         sbi->s_stat_kobj.kset = &f2fs_kset;
1150         init_completion(&sbi->s_stat_kobj_unregister);
1151         err = kobject_init_and_add(&sbi->s_stat_kobj, &f2fs_stat_ktype,
1152                                                 &sbi->s_kobj, "stat");
1153         if (err)
1154                 goto put_stat_kobj;
1155
1156         sbi->s_feature_list_kobj.kset = &f2fs_kset;
1157         init_completion(&sbi->s_feature_list_kobj_unregister);
1158         err = kobject_init_and_add(&sbi->s_feature_list_kobj,
1159                                         &f2fs_feature_list_ktype,
1160                                         &sbi->s_kobj, "feature_list");
1161         if (err)
1162                 goto put_feature_list_kobj;
1163
1164         if (f2fs_proc_root)
1165                 sbi->s_proc = proc_mkdir(sb->s_id, f2fs_proc_root);
1166
1167         if (sbi->s_proc) {
1168                 proc_create_single_data("segment_info", 0444, sbi->s_proc,
1169                                 segment_info_seq_show, sb);
1170                 proc_create_single_data("segment_bits", 0444, sbi->s_proc,
1171                                 segment_bits_seq_show, sb);
1172 #ifdef CONFIG_F2FS_IOSTAT
1173                 proc_create_single_data("iostat_info", 0444, sbi->s_proc,
1174                                 iostat_info_seq_show, sb);
1175 #endif
1176                 proc_create_single_data("victim_bits", 0444, sbi->s_proc,
1177                                 victim_bits_seq_show, sb);
1178         }
1179         return 0;
1180 put_feature_list_kobj:
1181         kobject_put(&sbi->s_feature_list_kobj);
1182         wait_for_completion(&sbi->s_feature_list_kobj_unregister);
1183 put_stat_kobj:
1184         kobject_put(&sbi->s_stat_kobj);
1185         wait_for_completion(&sbi->s_stat_kobj_unregister);
1186 put_sb_kobj:
1187         kobject_put(&sbi->s_kobj);
1188         wait_for_completion(&sbi->s_kobj_unregister);
1189         return err;
1190 }
1191
1192 void f2fs_unregister_sysfs(struct f2fs_sb_info *sbi)
1193 {
1194         if (sbi->s_proc) {
1195 #ifdef CONFIG_F2FS_IOSTAT
1196                 remove_proc_entry("iostat_info", sbi->s_proc);
1197 #endif
1198                 remove_proc_entry("segment_info", sbi->s_proc);
1199                 remove_proc_entry("segment_bits", sbi->s_proc);
1200                 remove_proc_entry("victim_bits", sbi->s_proc);
1201                 remove_proc_entry(sbi->sb->s_id, f2fs_proc_root);
1202         }
1203
1204         kobject_del(&sbi->s_stat_kobj);
1205         kobject_put(&sbi->s_stat_kobj);
1206         wait_for_completion(&sbi->s_stat_kobj_unregister);
1207         kobject_del(&sbi->s_feature_list_kobj);
1208         kobject_put(&sbi->s_feature_list_kobj);
1209         wait_for_completion(&sbi->s_feature_list_kobj_unregister);
1210
1211         kobject_del(&sbi->s_kobj);
1212         kobject_put(&sbi->s_kobj);
1213         wait_for_completion(&sbi->s_kobj_unregister);
1214 }