fs/f2fs/sysfs.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 /*
   3  * f2fs sysfs interface
   4  *
   5  * Copyright (c) 2012 Samsung Electronics Co., Ltd.
   6  *             http://www.samsung.com/
   7  * Copyright (c) 2017 Chao Yu <chao@kernel.org>
   8  */
   9 #include <linux/compiler.h>
  10 #include <linux/proc_fs.h>
  11 #include <linux/f2fs_fs.h>
  12 #include <linux/seq_file.h>
  13 #include <linux/unicode.h>
  14 #include <linux/ioprio.h>
  15 #include <linux/sysfs.h>
  16
  17 #include "f2fs.h"
  18 #include "segment.h"
  19 #include "gc.h"
  20 #include "iostat.h"
  21 #include <trace/events/f2fs.h>
  22
  23 static struct proc_dir_entry *f2fs_proc_root;
  24
  25 /* Sysfs support for f2fs */
  26 enum {
  27         GC_THREAD,      /* struct f2fs_gc_thread */
  28         SM_INFO,        /* struct f2fs_sm_info */
  29         DCC_INFO,       /* struct discard_cmd_control */
  30         NM_INFO,        /* struct f2fs_nm_info */
  31         F2FS_SBI,       /* struct f2fs_sb_info */
  32 #ifdef CONFIG_F2FS_STAT_FS
  33         STAT_INFO,      /* struct f2fs_stat_info */
  34 #endif
  35 #ifdef CONFIG_F2FS_FAULT_INJECTION
  36         FAULT_INFO_RATE,        /* struct f2fs_fault_info */
  37         FAULT_INFO_TYPE,        /* struct f2fs_fault_info */
  38 #endif
  39         RESERVED_BLOCKS,        /* struct f2fs_sb_info */
  40         CPRC_INFO,      /* struct ckpt_req_control */
  41         ATGC_INFO,      /* struct atgc_management */
  42 };
  43
  44 static const char *gc_mode_names[MAX_GC_MODE] = {
  45         "GC_NORMAL",
  46         "GC_IDLE_CB",
  47         "GC_IDLE_GREEDY",
  48         "GC_IDLE_AT",
  49         "GC_URGENT_HIGH",
  50         "GC_URGENT_LOW",
  51         "GC_URGENT_MID"
  52 };
  53
  54 struct f2fs_attr {
  55         struct attribute attr;
  56         ssize_t (*show)(struct f2fs_attr *a, struct f2fs_sb_info *sbi, char *buf);
  57         ssize_t (*store)(struct f2fs_attr *a, struct f2fs_sb_info *sbi,
  58                          const char *buf, size_t len);
  59         int struct_type;
  60         int offset;
  61         int id;
  62 };
  63
  64 static ssize_t f2fs_sbi_show(struct f2fs_attr *a,
  65                              struct f2fs_sb_info *sbi, char *buf);
  66
  67 static unsigned char *__struct_ptr(struct f2fs_sb_info *sbi, int struct_type)
  68 {
  69         if (struct_type == GC_THREAD)
  70                 return (unsigned char *)sbi->gc_thread;
  71         else if (struct_type == SM_INFO)
  72                 return (unsigned char *)SM_I(sbi);
  73         else if (struct_type == DCC_INFO)
  74                 return (unsigned char *)SM_I(sbi)->dcc_info;
  75         else if (struct_type == NM_INFO)
  76                 return (unsigned char *)NM_I(sbi);
  77         else if (struct_type == F2FS_SBI || struct_type == RESERVED_BLOCKS)
  78                 return (unsigned char *)sbi;
  79 #ifdef CONFIG_F2FS_FAULT_INJECTION
  80         else if (struct_type == FAULT_INFO_RATE ||
  81                                         struct_type == FAULT_INFO_TYPE)
  82                 return (unsigned char *)&F2FS_OPTION(sbi).fault_info;
  83 #endif
  84 #ifdef CONFIG_F2FS_STAT_FS
  85         else if (struct_type == STAT_INFO)
  86                 return (unsigned char *)F2FS_STAT(sbi);
  87 #endif
  88         else if (struct_type == CPRC_INFO)
  89                 return (unsigned char *)&sbi->cprc_info;
  90         else if (struct_type == ATGC_INFO)
  91                 return (unsigned char *)&sbi->am;
  92         return NULL;
  93 }
  94
  95 static ssize_t dirty_segments_show(struct f2fs_attr *a,
  96                 struct f2fs_sb_info *sbi, char *buf)
  97 {
  98         return sysfs_emit(buf, "%llu\n",
  99                         (unsigned long long)(dirty_segments(sbi)));
 100 }
 101
 102 static ssize_t free_segments_show(struct f2fs_attr *a,
 103                 struct f2fs_sb_info *sbi, char *buf)
 104 {
 105         return sysfs_emit(buf, "%llu\n",
 106                         (unsigned long long)(free_segments(sbi)));
 107 }
 108
 109 static ssize_t ovp_segments_show(struct f2fs_attr *a,
 110                 struct f2fs_sb_info *sbi, char *buf)
 111 {
 112         return sysfs_emit(buf, "%llu\n",
 113                         (unsigned long long)(overprovision_segments(sbi)));
 114 }
 115
 116 static ssize_t lifetime_write_kbytes_show(struct f2fs_attr *a,
 117                 struct f2fs_sb_info *sbi, char *buf)
 118 {
 119         return sysfs_emit(buf, "%llu\n",
 120                         (unsigned long long)(sbi->kbytes_written +
 121                         ((f2fs_get_sectors_written(sbi) -
 122                                 sbi->sectors_written_start) >> 1)));
 123 }
 124
 125 static ssize_t sb_status_show(struct f2fs_attr *a,
 126                 struct f2fs_sb_info *sbi, char *buf)
 127 {
 128         return sysfs_emit(buf, "%lx\n", sbi->s_flag);
 129 }
 130
 131 static ssize_t cp_status_show(struct f2fs_attr *a,
 132                 struct f2fs_sb_info *sbi, char *buf)
 133 {
 134         return sysfs_emit(buf, "%x\n", le32_to_cpu(F2FS_CKPT(sbi)->ckpt_flags));
 135 }
 136
 137 static ssize_t pending_discard_show(struct f2fs_attr *a,
 138                 struct f2fs_sb_info *sbi, char *buf)
 139 {
 140         if (!SM_I(sbi)->dcc_info)
 141                 return -EINVAL;
 142         return sysfs_emit(buf, "%llu\n", (unsigned long long)atomic_read(
 143                                 &SM_I(sbi)->dcc_info->discard_cmd_cnt));
 144 }
 145
 146 static ssize_t issued_discard_show(struct f2fs_attr *a,
 147                 struct f2fs_sb_info *sbi, char *buf)
 148 {
 149         if (!SM_I(sbi)->dcc_info)
 150                 return -EINVAL;
 151         return sysfs_emit(buf, "%llu\n", (unsigned long long)atomic_read(
 152                                 &SM_I(sbi)->dcc_info->issued_discard));
 153 }
 154
 155 static ssize_t queued_discard_show(struct f2fs_attr *a,
 156                 struct f2fs_sb_info *sbi, char *buf)
 157 {
 158         if (!SM_I(sbi)->dcc_info)
 159                 return -EINVAL;
 160         return sysfs_emit(buf, "%llu\n", (unsigned long long)atomic_read(
 161                                 &SM_I(sbi)->dcc_info->queued_discard));
 162 }
 163
 164 static ssize_t undiscard_blks_show(struct f2fs_attr *a,
 165                 struct f2fs_sb_info *sbi, char *buf)
 166 {
 167         if (!SM_I(sbi)->dcc_info)
 168                 return -EINVAL;
 169         return sysfs_emit(buf, "%u\n",
 170                                 SM_I(sbi)->dcc_info->undiscard_blks);
 171 }
 172
 173 static ssize_t atgc_enabled_show(struct f2fs_attr *a,
 174                 struct f2fs_sb_info *sbi, char *buf)
 175 {
 176         return sysfs_emit(buf, "%d\n", sbi->am.atgc_enabled ? 1 : 0);
 177 }
 178
 179 static ssize_t gc_mode_show(struct f2fs_attr *a,
 180                 struct f2fs_sb_info *sbi, char *buf)
 181 {
 182         return sysfs_emit(buf, "%s\n", gc_mode_names[sbi->gc_mode]);
 183 }
 184
 185 static ssize_t features_show(struct f2fs_attr *a,
 186                 struct f2fs_sb_info *sbi, char *buf)
 187 {
 188         int len = 0;
 189
 190         if (f2fs_sb_has_encrypt(sbi))
 191                 len += sysfs_emit_at(buf, len, "%s",
 192                                                 "encryption");
 193         if (f2fs_sb_has_blkzoned(sbi))
 194                 len += sysfs_emit_at(buf, len, "%s%s",
 195                                 len ? ", " : "", "blkzoned");
 196         if (f2fs_sb_has_extra_attr(sbi))
 197                 len += sysfs_emit_at(buf, len, "%s%s",
 198                                 len ? ", " : "", "extra_attr");
 199         if (f2fs_sb_has_project_quota(sbi))
 200                 len += sysfs_emit_at(buf, len, "%s%s",
 201                                 len ? ", " : "", "projquota");
 202         if (f2fs_sb_has_inode_chksum(sbi))
 203                 len += sysfs_emit_at(buf, len, "%s%s",
 204                                 len ? ", " : "", "inode_checksum");
 205         if (f2fs_sb_has_flexible_inline_xattr(sbi))
 206                 len += sysfs_emit_at(buf, len, "%s%s",
 207                                 len ? ", " : "", "flexible_inline_xattr");
 208         if (f2fs_sb_has_quota_ino(sbi))
 209                 len += sysfs_emit_at(buf, len, "%s%s",
 210                                 len ? ", " : "", "quota_ino");
 211         if (f2fs_sb_has_inode_crtime(sbi))
 212                 len += sysfs_emit_at(buf, len, "%s%s",
 213                                 len ? ", " : "", "inode_crtime");
 214         if (f2fs_sb_has_lost_found(sbi))
 215                 len += sysfs_emit_at(buf, len, "%s%s",
 216                                 len ? ", " : "", "lost_found");
 217         if (f2fs_sb_has_verity(sbi))
 218                 len += sysfs_emit_at(buf, len, "%s%s",
 219                                 len ? ", " : "", "verity");
 220         if (f2fs_sb_has_sb_chksum(sbi))
 221                 len += sysfs_emit_at(buf, len, "%s%s",
 222                                 len ? ", " : "", "sb_checksum");
 223         if (f2fs_sb_has_casefold(sbi))
 224                 len += sysfs_emit_at(buf, len, "%s%s",
 225                                 len ? ", " : "", "casefold");
 226         if (f2fs_sb_has_readonly(sbi))
 227                 len += sysfs_emit_at(buf, len, "%s%s",
 228                                 len ? ", " : "", "readonly");
 229         if (f2fs_sb_has_compression(sbi))
 230                 len += sysfs_emit_at(buf, len, "%s%s",
 231                                 len ? ", " : "", "compression");
 232         len += sysfs_emit_at(buf, len, "%s%s",
 233                                 len ? ", " : "", "pin_file");
 234         len += sysfs_emit_at(buf, len, "\n");
 235         return len;
 236 }
 237
 238 static ssize_t current_reserved_blocks_show(struct f2fs_attr *a,
 239                                         struct f2fs_sb_info *sbi, char *buf)
 240 {
 241         return sysfs_emit(buf, "%u\n", sbi->current_reserved_blocks);
 242 }
 243
 244 static ssize_t unusable_show(struct f2fs_attr *a,
 245                 struct f2fs_sb_info *sbi, char *buf)
 246 {
 247         block_t unusable;
 248
 249         if (test_opt(sbi, DISABLE_CHECKPOINT))
 250                 unusable = sbi->unusable_block_count;
 251         else
 252                 unusable = f2fs_get_unusable_blocks(sbi);
 253         return sysfs_emit(buf, "%llu\n", (unsigned long long)unusable);
 254 }
 255
 256 static ssize_t encoding_show(struct f2fs_attr *a,
 257                 struct f2fs_sb_info *sbi, char *buf)
 258 {
 259 #if IS_ENABLED(CONFIG_UNICODE)
 260         struct super_block *sb = sbi->sb;
 261
 262         if (f2fs_sb_has_casefold(sbi))
 263                 return sysfs_emit(buf, "UTF-8 (%d.%d.%d)\n",
 264                         (sb->s_encoding->version >> 16) & 0xff,
 265                         (sb->s_encoding->version >> 8) & 0xff,
 266                         sb->s_encoding->version & 0xff);
 267 #endif
 268         return sysfs_emit(buf, "(none)\n");
 269 }
 270
 271 static ssize_t mounted_time_sec_show(struct f2fs_attr *a,
 272                 struct f2fs_sb_info *sbi, char *buf)
 273 {
 274         return sysfs_emit(buf, "%llu\n", SIT_I(sbi)->mounted_time);
 275 }
 276
 277 #ifdef CONFIG_F2FS_STAT_FS
 278 static ssize_t moved_blocks_foreground_show(struct f2fs_attr *a,
 279                                 struct f2fs_sb_info *sbi, char *buf)
 280 {
 281         struct f2fs_stat_info *si = F2FS_STAT(sbi);
 282
 283         return sysfs_emit(buf, "%llu\n",
 284                 (unsigned long long)(si->tot_blks -
 285                         (si->bg_data_blks + si->bg_node_blks)));
 286 }
 287
 288 static ssize_t moved_blocks_background_show(struct f2fs_attr *a,
 289                                 struct f2fs_sb_info *sbi, char *buf)
 290 {
 291         struct f2fs_stat_info *si = F2FS_STAT(sbi);
 292
 293         return sysfs_emit(buf, "%llu\n",
 294                 (unsigned long long)(si->bg_data_blks + si->bg_node_blks));
 295 }
 296
 297 static ssize_t avg_vblocks_show(struct f2fs_attr *a,
 298                 struct f2fs_sb_info *sbi, char *buf)
 299 {
 300         struct f2fs_stat_info *si = F2FS_STAT(sbi);
 301
 302         si->dirty_count = dirty_segments(sbi);
 303         f2fs_update_sit_info(sbi);
 304         return sysfs_emit(buf, "%llu\n", (unsigned long long)(si->avg_vblocks));
 305 }
 306 #endif
 307
 308 static ssize_t main_blkaddr_show(struct f2fs_attr *a,
 309                                 struct f2fs_sb_info *sbi, char *buf)
 310 {
 311         return sysfs_emit(buf, "%llu\n",
 312                         (unsigned long long)MAIN_BLKADDR(sbi));
 313 }
 314
 315 static ssize_t f2fs_sbi_show(struct f2fs_attr *a,
 316                         struct f2fs_sb_info *sbi, char *buf)
 317 {
 318         unsigned char *ptr = NULL;
 319         unsigned int *ui;
 320
 321         ptr = __struct_ptr(sbi, a->struct_type);
 322         if (!ptr)
 323                 return -EINVAL;
 324
 325         if (!strcmp(a->attr.name, "extension_list")) {
 326                 __u8 (*extlist)[F2FS_EXTENSION_LEN] =
 327                                         sbi->raw_super->extension_list;
 328                 int cold_count = le32_to_cpu(sbi->raw_super->extension_count);
 329                 int hot_count = sbi->raw_super->hot_ext_count;
 330                 int len = 0, i;
 331
 332                 len += sysfs_emit_at(buf, len, "cold file extension:\n");
 333                 for (i = 0; i < cold_count; i++)
 334                         len += sysfs_emit_at(buf, len, "%s\n", extlist[i]);
 335
 336                 len += sysfs_emit_at(buf, len, "hot file extension:\n");
 337                 for (i = cold_count; i < cold_count + hot_count; i++)
 338                         len += sysfs_emit_at(buf, len, "%s\n", extlist[i]);
 339
 340                 return len;
 341         }
 342
 343         if (!strcmp(a->attr.name, "ckpt_thread_ioprio")) {
 344                 struct ckpt_req_control *cprc = &sbi->cprc_info;
 345                 int class = IOPRIO_PRIO_CLASS(cprc->ckpt_thread_ioprio);
 346                 int level = IOPRIO_PRIO_LEVEL(cprc->ckpt_thread_ioprio);
 347
 348                 if (class != IOPRIO_CLASS_RT && class != IOPRIO_CLASS_BE)
 349                         return -EINVAL;
 350
 351                 return sysfs_emit(buf, "%s,%d\n",
 352                         class == IOPRIO_CLASS_RT ? "rt" : "be", level);
 353         }
 354
 355 #ifdef CONFIG_F2FS_FS_COMPRESSION
 356         if (!strcmp(a->attr.name, "compr_written_block"))
 357                 return sysfs_emit(buf, "%llu\n", sbi->compr_written_block);
 358
 359         if (!strcmp(a->attr.name, "compr_saved_block"))
 360                 return sysfs_emit(buf, "%llu\n", sbi->compr_saved_block);
 361
 362         if (!strcmp(a->attr.name, "compr_new_inode"))
 363                 return sysfs_emit(buf, "%u\n", sbi->compr_new_inode);
 364 #endif
 365
 366         if (!strcmp(a->attr.name, "gc_segment_mode"))
 367                 return sysfs_emit(buf, "%u\n", sbi->gc_segment_mode);
 368
 369         if (!strcmp(a->attr.name, "gc_reclaimed_segments")) {
 370                 return sysfs_emit(buf, "%u\n",
 371                         sbi->gc_reclaimed_segs[sbi->gc_segment_mode]);
 372         }
 373
 374         if (!strcmp(a->attr.name, "current_atomic_write")) {
 375                 s64 current_write = atomic64_read(&sbi->current_atomic_write);
 376
 377                 return sysfs_emit(buf, "%lld\n", current_write);
 378         }
 379
 380         if (!strcmp(a->attr.name, "peak_atomic_write"))
 381                 return sysfs_emit(buf, "%lld\n", sbi->peak_atomic_write);
 382
 383         if (!strcmp(a->attr.name, "committed_atomic_block"))
 384                 return sysfs_emit(buf, "%llu\n", sbi->committed_atomic_block);
 385
 386         if (!strcmp(a->attr.name, "revoked_atomic_block"))
 387                 return sysfs_emit(buf, "%llu\n", sbi->revoked_atomic_block);
 388
 389 #ifdef CONFIG_F2FS_STAT_FS
 390         if (!strcmp(a->attr.name, "cp_foreground_calls"))
 391                 return sysfs_emit(buf, "%d\n",
 392                                 atomic_read(&sbi->cp_call_count[TOTAL_CALL]) -
 393                                 atomic_read(&sbi->cp_call_count[BACKGROUND]));
 394         if (!strcmp(a->attr.name, "cp_background_calls"))
 395                 return sysfs_emit(buf, "%d\n",
 396                                 atomic_read(&sbi->cp_call_count[BACKGROUND]));
 397 #endif
 398
 399         ui = (unsigned int *)(ptr + a->offset);
 400
 401         return sysfs_emit(buf, "%u\n", *ui);
 402 }
 403
 404 static ssize_t __sbi_store(struct f2fs_attr *a,
 405                         struct f2fs_sb_info *sbi,
 406                         const char *buf, size_t count)
 407 {
 408         unsigned char *ptr;
 409         unsigned long t;
 410         unsigned int *ui;
 411         ssize_t ret;
 412
 413         ptr = __struct_ptr(sbi, a->struct_type);
 414         if (!ptr)
 415                 return -EINVAL;
 416
 417         if (!strcmp(a->attr.name, "extension_list")) {
 418                 const char *name = strim((char *)buf);
 419                 bool set = true, hot;
 420
 421                 if (!strncmp(name, "[h]", 3))
 422                         hot = true;
 423                 else if (!strncmp(name, "[c]", 3))
 424                         hot = false;
 425                 else
 426                         return -EINVAL;
 427
 428                 name += 3;
 429
 430                 if (*name == '!') {
 431                         name++;
 432                         set = false;
 433                 }
 434
 435                 if (!strlen(name) || strlen(name) >= F2FS_EXTENSION_LEN)
 436                         return -EINVAL;
 437
 438                 f2fs_down_write(&sbi->sb_lock);
 439
 440                 ret = f2fs_update_extension_list(sbi, name, hot, set);
 441                 if (ret)
 442                         goto out;
 443
 444                 ret = f2fs_commit_super(sbi, false);
 445                 if (ret)
 446                         f2fs_update_extension_list(sbi, name, hot, !set);
 447 out:
 448                 f2fs_up_write(&sbi->sb_lock);
 449                 return ret ? ret : count;
 450         }
 451
 452         if (!strcmp(a->attr.name, "ckpt_thread_ioprio")) {
 453                 const char *name = strim((char *)buf);
 454                 struct ckpt_req_control *cprc = &sbi->cprc_info;
 455                 int class;
 456                 long level;
 457                 int ret;
 458
 459                 if (!strncmp(name, "rt,", 3))
 460                         class = IOPRIO_CLASS_RT;
 461                 else if (!strncmp(name, "be,", 3))
 462                         class = IOPRIO_CLASS_BE;
 463                 else
 464                         return -EINVAL;
 465
 466                 name += 3;
 467                 ret = kstrtol(name, 10, &level);
 468                 if (ret)
 469                         return ret;
 470                 if (level >= IOPRIO_NR_LEVELS || level < 0)
 471                         return -EINVAL;
 472
 473                 cprc->ckpt_thread_ioprio = IOPRIO_PRIO_VALUE(class, level);
 474                 if (test_opt(sbi, MERGE_CHECKPOINT)) {
 475                         ret = set_task_ioprio(cprc->f2fs_issue_ckpt,
 476                                         cprc->ckpt_thread_ioprio);
 477                         if (ret)
 478                                 return ret;
 479                 }
 480
 481                 return count;
 482         }
 483
 484         ui = (unsigned int *)(ptr + a->offset);
 485
 486         ret = kstrtoul(skip_spaces(buf), 0, &t);
 487         if (ret < 0)
 488                 return ret;
 489 #ifdef CONFIG_F2FS_FAULT_INJECTION
 490         if (a->struct_type == FAULT_INFO_TYPE) {
 491                 if (f2fs_build_fault_attr(sbi, 0, t))
 492                         return -EINVAL;
 493                 return count;
 494         }
 495         if (a->struct_type == FAULT_INFO_RATE) {
 496                 if (f2fs_build_fault_attr(sbi, t, 0))
 497                         return -EINVAL;
 498                 return count;
 499         }
 500 #endif
 501         if (a->struct_type == RESERVED_BLOCKS) {
 502                 spin_lock(&sbi->stat_lock);
 503                 if (t > (unsigned long)(sbi->user_block_count -
 504                                 F2FS_OPTION(sbi).root_reserved_blocks -
 505                                 SEGS_TO_BLKS(sbi,
 506                                 SM_I(sbi)->additional_reserved_segments))) {
 507                         spin_unlock(&sbi->stat_lock);
 508                         return -EINVAL;
 509                 }
 510                 *ui = t;
 511                 sbi->current_reserved_blocks = min(sbi->reserved_blocks,
 512                                 sbi->user_block_count - valid_user_blocks(sbi));
 513                 spin_unlock(&sbi->stat_lock);
 514                 return count;
 515         }
 516
 517         if (!strcmp(a->attr.name, "discard_io_aware_gran")) {
 518                 if (t > MAX_PLIST_NUM)
 519                         return -EINVAL;
 520                 if (!f2fs_block_unit_discard(sbi))
 521                         return -EINVAL;
 522                 if (t == *ui)
 523                         return count;
 524                 *ui = t;
 525                 return count;
 526         }
 527
 528         if (!strcmp(a->attr.name, "discard_granularity")) {
 529                 if (t == 0 || t > MAX_PLIST_NUM)
 530                         return -EINVAL;
 531                 if (!f2fs_block_unit_discard(sbi))
 532                         return -EINVAL;
 533                 if (t == *ui)
 534                         return count;
 535                 *ui = t;
 536                 return count;
 537         }
 538
 539         if (!strcmp(a->attr.name, "max_ordered_discard")) {
 540                 if (t == 0 || t > MAX_PLIST_NUM)
 541                         return -EINVAL;
 542                 if (!f2fs_block_unit_discard(sbi))
 543                         return -EINVAL;
 544                 *ui = t;
 545                 return count;
 546         }
 547
 548         if (!strcmp(a->attr.name, "discard_urgent_util")) {
 549                 if (t > 100)
 550                         return -EINVAL;
 551                 *ui = t;
 552                 return count;
 553         }
 554
 555         if (!strcmp(a->attr.name, "discard_io_aware")) {
 556                 if (t >= DPOLICY_IO_AWARE_MAX)
 557                         return -EINVAL;
 558                 *ui = t;
 559                 return count;
 560         }
 561
 562         if (!strcmp(a->attr.name, "migration_granularity")) {
 563                 if (t == 0 || t > SEGS_PER_SEC(sbi))
 564                         return -EINVAL;
 565         }
 566
 567         if (!strcmp(a->attr.name, "migration_window_granularity")) {
 568                 if (t == 0 || t > SEGS_PER_SEC(sbi))
 569                         return -EINVAL;
 570         }
 571
 572         if (!strcmp(a->attr.name, "gc_urgent")) {
 573                 if (t == 0) {
 574                         sbi->gc_mode = GC_NORMAL;
 575                 } else if (t == 1) {
 576                         sbi->gc_mode = GC_URGENT_HIGH;
 577                         if (sbi->gc_thread) {
 578                                 sbi->gc_thread->gc_wake = true;
 579                                 wake_up_interruptible_all(
 580                                         &sbi->gc_thread->gc_wait_queue_head);
 581                                 wake_up_discard_thread(sbi, true);
 582                         }
 583                 } else if (t == 2) {
 584                         sbi->gc_mode = GC_URGENT_LOW;
 585                 } else if (t == 3) {
 586                         sbi->gc_mode = GC_URGENT_MID;
 587                         if (sbi->gc_thread) {
 588                                 sbi->gc_thread->gc_wake = true;
 589                                 wake_up_interruptible_all(
 590                                         &sbi->gc_thread->gc_wait_queue_head);
 591                         }
 592                 } else {
 593                         return -EINVAL;
 594                 }
 595                 return count;
 596         }
 597         if (!strcmp(a->attr.name, "gc_idle")) {
 598                 if (t == GC_IDLE_CB) {
 599                         sbi->gc_mode = GC_IDLE_CB;
 600                 } else if (t == GC_IDLE_GREEDY) {
 601                         sbi->gc_mode = GC_IDLE_GREEDY;
 602                 } else if (t == GC_IDLE_AT) {
 603                         if (!sbi->am.atgc_enabled)
 604                                 return -EINVAL;
 605                         sbi->gc_mode = GC_IDLE_AT;
 606                 } else {
 607                         sbi->gc_mode = GC_NORMAL;
 608                 }
 609                 return count;
 610         }
 611
 612         if (!strcmp(a->attr.name, "gc_remaining_trials")) {
 613                 spin_lock(&sbi->gc_remaining_trials_lock);
 614                 sbi->gc_remaining_trials = t;
 615                 spin_unlock(&sbi->gc_remaining_trials_lock);
 616
 617                 return count;
 618         }
 619
 620 #ifdef CONFIG_F2FS_IOSTAT
 621         if (!strcmp(a->attr.name, "iostat_enable")) {
 622                 sbi->iostat_enable = !!t;
 623                 if (!sbi->iostat_enable)
 624                         f2fs_reset_iostat(sbi);
 625                 return count;
 626         }
 627
 628         if (!strcmp(a->attr.name, "iostat_period_ms")) {
 629                 if (t < MIN_IOSTAT_PERIOD_MS || t > MAX_IOSTAT_PERIOD_MS)
 630                         return -EINVAL;
 631                 spin_lock_irq(&sbi->iostat_lock);
 632                 sbi->iostat_period_ms = (unsigned int)t;
 633                 spin_unlock_irq(&sbi->iostat_lock);
 634                 return count;
 635         }
 636 #endif
 637
 638 #ifdef CONFIG_BLK_DEV_ZONED
 639         if (!strcmp(a->attr.name, "blkzone_alloc_policy")) {
 640                 if (t < BLKZONE_ALLOC_PRIOR_SEQ || t > BLKZONE_ALLOC_PRIOR_CONV)
 641                         return -EINVAL;
 642                 sbi->blkzone_alloc_policy = t;
 643                 return count;
 644         }
 645 #endif
 646
 647 #ifdef CONFIG_F2FS_FS_COMPRESSION
 648         if (!strcmp(a->attr.name, "compr_written_block") ||
 649                 !strcmp(a->attr.name, "compr_saved_block")) {
 650                 if (t != 0)
 651                         return -EINVAL;
 652                 sbi->compr_written_block = 0;
 653                 sbi->compr_saved_block = 0;
 654                 return count;
 655         }
 656
 657         if (!strcmp(a->attr.name, "compr_new_inode")) {
 658                 if (t != 0)
 659                         return -EINVAL;
 660                 sbi->compr_new_inode = 0;
 661                 return count;
 662         }
 663
 664         if (!strcmp(a->attr.name, "compress_percent")) {
 665                 if (t == 0 || t > 100)
 666                         return -EINVAL;
 667                 *ui = t;
 668                 return count;
 669         }
 670
 671         if (!strcmp(a->attr.name, "compress_watermark")) {
 672                 if (t == 0 || t > 100)
 673                         return -EINVAL;
 674                 *ui = t;
 675                 return count;
 676         }
 677 #endif
 678
 679         if (!strcmp(a->attr.name, "atgc_candidate_ratio")) {
 680                 if (t > 100)
 681                         return -EINVAL;
 682                 sbi->am.candidate_ratio = t;
 683                 return count;
 684         }
 685
 686         if (!strcmp(a->attr.name, "atgc_age_weight")) {
 687                 if (t > 100)
 688                         return -EINVAL;
 689                 sbi->am.age_weight = t;
 690                 return count;
 691         }
 692
 693         if (!strcmp(a->attr.name, "gc_segment_mode")) {
 694                 if (t < MAX_GC_MODE)
 695                         sbi->gc_segment_mode = t;
 696                 else
 697                         return -EINVAL;
 698                 return count;
 699         }
 700
 701         if (!strcmp(a->attr.name, "gc_pin_file_threshold")) {
 702                 if (t > MAX_GC_FAILED_PINNED_FILES)
 703                         return -EINVAL;
 704                 sbi->gc_pin_file_threshold = t;
 705                 return count;
 706         }
 707
 708         if (!strcmp(a->attr.name, "gc_reclaimed_segments")) {
 709                 if (t != 0)
 710                         return -EINVAL;
 711                 sbi->gc_reclaimed_segs[sbi->gc_segment_mode] = 0;
 712                 return count;
 713         }
 714
 715         if (!strcmp(a->attr.name, "seq_file_ra_mul")) {
 716                 if (t >= MIN_RA_MUL && t <= MAX_RA_MUL)
 717                         sbi->seq_file_ra_mul = t;
 718                 else
 719                         return -EINVAL;
 720                 return count;
 721         }
 722
 723         if (!strcmp(a->attr.name, "max_fragment_chunk")) {
 724                 if (t >= MIN_FRAGMENT_SIZE && t <= MAX_FRAGMENT_SIZE)
 725                         sbi->max_fragment_chunk = t;
 726                 else
 727                         return -EINVAL;
 728                 return count;
 729         }
 730
 731         if (!strcmp(a->attr.name, "max_fragment_hole")) {
 732                 if (t >= MIN_FRAGMENT_SIZE && t <= MAX_FRAGMENT_SIZE)
 733                         sbi->max_fragment_hole = t;
 734                 else
 735                         return -EINVAL;
 736                 return count;
 737         }
 738
 739         if (!strcmp(a->attr.name, "peak_atomic_write")) {
 740                 if (t != 0)
 741                         return -EINVAL;
 742                 sbi->peak_atomic_write = 0;
 743                 return count;
 744         }
 745
 746         if (!strcmp(a->attr.name, "committed_atomic_block")) {
 747                 if (t != 0)
 748                         return -EINVAL;
 749                 sbi->committed_atomic_block = 0;
 750                 return count;
 751         }
 752
 753         if (!strcmp(a->attr.name, "revoked_atomic_block")) {
 754                 if (t != 0)
 755                         return -EINVAL;
 756                 sbi->revoked_atomic_block = 0;
 757                 return count;
 758         }
 759
 760         if (!strcmp(a->attr.name, "readdir_ra")) {
 761                 sbi->readdir_ra = !!t;
 762                 return count;
 763         }
 764
 765         if (!strcmp(a->attr.name, "hot_data_age_threshold")) {
 766                 if (t == 0 || t >= sbi->warm_data_age_threshold)
 767                         return -EINVAL;
 768                 if (t == *ui)
 769                         return count;
 770                 *ui = (unsigned int)t;
 771                 return count;
 772         }
 773
 774         if (!strcmp(a->attr.name, "warm_data_age_threshold")) {
 775                 if (t <= sbi->hot_data_age_threshold)
 776                         return -EINVAL;
 777                 if (t == *ui)
 778                         return count;
 779                 *ui = (unsigned int)t;
 780                 return count;
 781         }
 782
 783         if (!strcmp(a->attr.name, "last_age_weight")) {
 784                 if (t > 100)
 785                         return -EINVAL;
 786                 if (t == *ui)
 787                         return count;
 788                 *ui = (unsigned int)t;
 789                 return count;
 790         }
 791
 792         if (!strcmp(a->attr.name, "ipu_policy")) {
 793                 if (t >= BIT(F2FS_IPU_MAX))
 794                         return -EINVAL;
 795                 /* allow F2FS_IPU_NOCACHE only for IPU in the pinned file */
 796                 if (f2fs_lfs_mode(sbi) && (t & ~BIT(F2FS_IPU_NOCACHE)))
 797                         return -EINVAL;
 798                 SM_I(sbi)->ipu_policy = (unsigned int)t;
 799                 return count;
 800         }
 801
 802         if (!strcmp(a->attr.name, "dir_level")) {
 803                 if (t > MAX_DIR_HASH_DEPTH)
 804                         return -EINVAL;
 805                 sbi->dir_level = t;
 806                 return count;
 807         }
 808
 809         *ui = (unsigned int)t;
 810
 811         return count;
 812 }
 813
 814 static ssize_t f2fs_sbi_store(struct f2fs_attr *a,
 815                         struct f2fs_sb_info *sbi,
 816                         const char *buf, size_t count)
 817 {
 818         ssize_t ret;
 819         bool gc_entry = (!strcmp(a->attr.name, "gc_urgent") ||
 820                                         a->struct_type == GC_THREAD);
 821
 822         if (gc_entry) {
 823                 if (!down_read_trylock(&sbi->sb->s_umount))
 824                         return -EAGAIN;
 825         }
 826         ret = __sbi_store(a, sbi, buf, count);
 827         if (gc_entry)
 828                 up_read(&sbi->sb->s_umount);
 829
 830         return ret;
 831 }
 832
 833 static ssize_t f2fs_attr_show(struct kobject *kobj,
 834                                 struct attribute *attr, char *buf)
 835 {
 836         struct f2fs_sb_info *sbi = container_of(kobj, struct f2fs_sb_info,
 837                                                                 s_kobj);
 838         struct f2fs_attr *a = container_of(attr, struct f2fs_attr, attr);
 839
 840         return a->show ? a->show(a, sbi, buf) : 0;
 841 }
 842
 843 static ssize_t f2fs_attr_store(struct kobject *kobj, struct attribute *attr,
 844                                                 const char *buf, size_t len)
 845 {
 846         struct f2fs_sb_info *sbi = container_of(kobj, struct f2fs_sb_info,
 847                                                                         s_kobj);
 848         struct f2fs_attr *a = container_of(attr, struct f2fs_attr, attr);
 849
 850         return a->store ? a->store(a, sbi, buf, len) : 0;
 851 }
 852
 853 static void f2fs_sb_release(struct kobject *kobj)
 854 {
 855         struct f2fs_sb_info *sbi = container_of(kobj, struct f2fs_sb_info,
 856                                                                 s_kobj);
 857         complete(&sbi->s_kobj_unregister);
 858 }
 859
 860 /*
 861  * Note that there are three feature list entries:
 862  * 1) /sys/fs/f2fs/features
 863  *   : shows runtime features supported by in-kernel f2fs along with Kconfig.
 864  *     - ref. F2FS_FEATURE_RO_ATTR()
 865  *
 866  * 2) /sys/fs/f2fs/$s_id/features <deprecated>
 867  *   : shows on-disk features enabled by mkfs.f2fs, used for old kernels. This
 868  *     won't add new feature anymore, and thus, users should check entries in 3)
 869  *     instead of this 2).
 870  *
 871  * 3) /sys/fs/f2fs/$s_id/feature_list
 872  *   : shows on-disk features enabled by mkfs.f2fs per instance, which follows
 873  *     sysfs entry rule where each entry should expose single value.
 874  *     This list covers old feature list provided by 2) and beyond. Therefore,
 875  *     please add new on-disk feature in this list only.
 876  *     - ref. F2FS_SB_FEATURE_RO_ATTR()
 877  */
 878 static ssize_t f2fs_feature_show(struct f2fs_attr *a,
 879                 struct f2fs_sb_info *sbi, char *buf)
 880 {
 881         return sysfs_emit(buf, "supported\n");
 882 }
 883
 884 #define F2FS_FEATURE_RO_ATTR(_name)                             \
 885 static struct f2fs_attr f2fs_attr_##_name = {                   \
 886         .attr = {.name = __stringify(_name), .mode = 0444 },    \
 887         .show   = f2fs_feature_show,                            \
 888 }
 889
 890 static ssize_t f2fs_sb_feature_show(struct f2fs_attr *a,
 891                 struct f2fs_sb_info *sbi, char *buf)
 892 {
 893         if (F2FS_HAS_FEATURE(sbi, a->id))
 894                 return sysfs_emit(buf, "supported\n");
 895         return sysfs_emit(buf, "unsupported\n");
 896 }
 897
 898 #define F2FS_SB_FEATURE_RO_ATTR(_name, _feat)                   \
 899 static struct f2fs_attr f2fs_attr_sb_##_name = {                \
 900         .attr = {.name = __stringify(_name), .mode = 0444 },    \
 901         .show   = f2fs_sb_feature_show,                         \
 902         .id     = F2FS_FEATURE_##_feat,                         \
 903 }
 904
 905 #define F2FS_ATTR_OFFSET(_struct_type, _name, _mode, _show, _store, _offset) \
 906 static struct f2fs_attr f2fs_attr_##_name = {                   \
 907         .attr = {.name = __stringify(_name), .mode = _mode },   \
 908         .show   = _show,                                        \
 909         .store  = _store,                                       \
 910         .struct_type = _struct_type,                            \
 911         .offset = _offset                                       \
 912 }
 913
 914 #define F2FS_RO_ATTR(struct_type, struct_name, name, elname)    \
 915         F2FS_ATTR_OFFSET(struct_type, name, 0444,               \
 916                 f2fs_sbi_show, NULL,                            \
 917                 offsetof(struct struct_name, elname))
 918
 919 #define F2FS_RW_ATTR(struct_type, struct_name, name, elname)    \
 920         F2FS_ATTR_OFFSET(struct_type, name, 0644,               \
 921                 f2fs_sbi_show, f2fs_sbi_store,                  \
 922                 offsetof(struct struct_name, elname))
 923
 924 #define F2FS_GENERAL_RO_ATTR(name) \
 925 static struct f2fs_attr f2fs_attr_##name = __ATTR(name, 0444, name##_show, NULL)
 926
 927 #ifdef CONFIG_F2FS_STAT_FS
 928 #define STAT_INFO_RO_ATTR(name, elname)                         \
 929         F2FS_RO_ATTR(STAT_INFO, f2fs_stat_info, name, elname)
 930 #endif
 931
 932 #define GC_THREAD_RW_ATTR(name, elname)                         \
 933         F2FS_RW_ATTR(GC_THREAD, f2fs_gc_kthread, name, elname)
 934
 935 #define SM_INFO_RW_ATTR(name, elname)                           \
 936         F2FS_RW_ATTR(SM_INFO, f2fs_sm_info, name, elname)
 937
 938 #define SM_INFO_GENERAL_RW_ATTR(elname)                         \
 939         SM_INFO_RW_ATTR(elname, elname)
 940
 941 #define DCC_INFO_RW_ATTR(name, elname)                          \
 942         F2FS_RW_ATTR(DCC_INFO, discard_cmd_control, name, elname)
 943
 944 #define DCC_INFO_GENERAL_RW_ATTR(elname)                        \
 945         DCC_INFO_RW_ATTR(elname, elname)
 946
 947 #define NM_INFO_RW_ATTR(name, elname)                           \
 948         F2FS_RW_ATTR(NM_INFO, f2fs_nm_info, name, elname)
 949
 950 #define NM_INFO_GENERAL_RW_ATTR(elname)                         \
 951         NM_INFO_RW_ATTR(elname, elname)
 952
 953 #define F2FS_SBI_RW_ATTR(name, elname)                          \
 954         F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, name, elname)
 955
 956 #define F2FS_SBI_GENERAL_RW_ATTR(elname)                        \
 957         F2FS_SBI_RW_ATTR(elname, elname)
 958
 959 #define F2FS_SBI_GENERAL_RO_ATTR(elname)                        \
 960         F2FS_RO_ATTR(F2FS_SBI, f2fs_sb_info, elname, elname)
 961
 962 #ifdef CONFIG_F2FS_FAULT_INJECTION
 963 #define FAULT_INFO_GENERAL_RW_ATTR(type, elname)                \
 964         F2FS_RW_ATTR(type, f2fs_fault_info, elname, elname)
 965 #endif
 966
 967 #define RESERVED_BLOCKS_GENERAL_RW_ATTR(elname)                 \
 968         F2FS_RW_ATTR(RESERVED_BLOCKS, f2fs_sb_info, elname, elname)
 969
 970 #define CPRC_INFO_GENERAL_RW_ATTR(elname)                       \
 971         F2FS_RW_ATTR(CPRC_INFO, ckpt_req_control, elname, elname)
 972
 973 #define ATGC_INFO_RW_ATTR(name, elname)                         \
 974         F2FS_RW_ATTR(ATGC_INFO, atgc_management, name, elname)
 975
 976 /* GC_THREAD ATTR */
 977 GC_THREAD_RW_ATTR(gc_urgent_sleep_time, urgent_sleep_time);
 978 GC_THREAD_RW_ATTR(gc_min_sleep_time, min_sleep_time);
 979 GC_THREAD_RW_ATTR(gc_max_sleep_time, max_sleep_time);
 980 GC_THREAD_RW_ATTR(gc_no_gc_sleep_time, no_gc_sleep_time);
 981 GC_THREAD_RW_ATTR(gc_no_zoned_gc_percent, no_zoned_gc_percent);
 982 GC_THREAD_RW_ATTR(gc_boost_zoned_gc_percent, boost_zoned_gc_percent);
 983 GC_THREAD_RW_ATTR(gc_valid_thresh_ratio, valid_thresh_ratio);
 984
 985 /* SM_INFO ATTR */
 986 SM_INFO_RW_ATTR(reclaim_segments, rec_prefree_segments);
 987 SM_INFO_GENERAL_RW_ATTR(ipu_policy);
 988 SM_INFO_GENERAL_RW_ATTR(min_ipu_util);
 989 SM_INFO_GENERAL_RW_ATTR(min_fsync_blocks);
 990 SM_INFO_GENERAL_RW_ATTR(min_seq_blocks);
 991 SM_INFO_GENERAL_RW_ATTR(min_hot_blocks);
 992 SM_INFO_GENERAL_RW_ATTR(min_ssr_sections);
 993 SM_INFO_GENERAL_RW_ATTR(reserved_segments);
 994
 995 /* DCC_INFO ATTR */
 996 DCC_INFO_RW_ATTR(max_small_discards, max_discards);
 997 DCC_INFO_GENERAL_RW_ATTR(max_discard_request);
 998 DCC_INFO_GENERAL_RW_ATTR(min_discard_issue_time);
 999 DCC_INFO_GENERAL_RW_ATTR(mid_discard_issue_time);
1000 DCC_INFO_GENERAL_RW_ATTR(max_discard_issue_time);
1001 DCC_INFO_GENERAL_RW_ATTR(discard_io_aware_gran);
1002 DCC_INFO_GENERAL_RW_ATTR(discard_urgent_util);
1003 DCC_INFO_GENERAL_RW_ATTR(discard_granularity);
1004 DCC_INFO_GENERAL_RW_ATTR(max_ordered_discard);
1005 DCC_INFO_GENERAL_RW_ATTR(discard_io_aware);
1006
1007 /* NM_INFO ATTR */
1008 NM_INFO_RW_ATTR(max_roll_forward_node_blocks, max_rf_node_blocks);
1009 NM_INFO_GENERAL_RW_ATTR(ram_thresh);
1010 NM_INFO_GENERAL_RW_ATTR(ra_nid_pages);
1011 NM_INFO_GENERAL_RW_ATTR(dirty_nats_ratio);
1012
1013 /* F2FS_SBI ATTR */
1014 F2FS_RW_ATTR(F2FS_SBI, f2fs_super_block, extension_list, extension_list);
1015 F2FS_SBI_RW_ATTR(gc_idle, gc_mode);
1016 F2FS_SBI_RW_ATTR(gc_urgent, gc_mode);
1017 F2FS_SBI_RW_ATTR(cp_interval, interval_time[CP_TIME]);
1018 F2FS_SBI_RW_ATTR(idle_interval, interval_time[REQ_TIME]);
1019 F2FS_SBI_RW_ATTR(discard_idle_interval, interval_time[DISCARD_TIME]);
1020 F2FS_SBI_RW_ATTR(gc_idle_interval, interval_time[GC_TIME]);
1021 F2FS_SBI_RW_ATTR(umount_discard_timeout, interval_time[UMOUNT_DISCARD_TIMEOUT]);
1022 F2FS_SBI_RW_ATTR(gc_pin_file_thresh, gc_pin_file_threshold);
1023 F2FS_SBI_RW_ATTR(gc_reclaimed_segments, gc_reclaimed_segs);
1024 F2FS_SBI_GENERAL_RW_ATTR(max_victim_search);
1025 F2FS_SBI_GENERAL_RW_ATTR(migration_granularity);
1026 F2FS_SBI_GENERAL_RW_ATTR(migration_window_granularity);
1027 F2FS_SBI_GENERAL_RW_ATTR(dir_level);
1028 #ifdef CONFIG_F2FS_IOSTAT
1029 F2FS_SBI_GENERAL_RW_ATTR(iostat_enable);
1030 F2FS_SBI_GENERAL_RW_ATTR(iostat_period_ms);
1031 #endif
1032 F2FS_SBI_GENERAL_RW_ATTR(readdir_ra);
1033 F2FS_SBI_GENERAL_RW_ATTR(max_io_bytes);
1034 F2FS_SBI_GENERAL_RW_ATTR(data_io_flag);
1035 F2FS_SBI_GENERAL_RW_ATTR(node_io_flag);
1036 F2FS_SBI_GENERAL_RW_ATTR(gc_remaining_trials);
1037 F2FS_SBI_GENERAL_RW_ATTR(seq_file_ra_mul);
1038 F2FS_SBI_GENERAL_RW_ATTR(gc_segment_mode);
1039 F2FS_SBI_GENERAL_RW_ATTR(max_fragment_chunk);
1040 F2FS_SBI_GENERAL_RW_ATTR(max_fragment_hole);
1041 #ifdef CONFIG_F2FS_FS_COMPRESSION
1042 F2FS_SBI_GENERAL_RW_ATTR(compr_written_block);
1043 F2FS_SBI_GENERAL_RW_ATTR(compr_saved_block);
1044 F2FS_SBI_GENERAL_RW_ATTR(compr_new_inode);
1045 F2FS_SBI_GENERAL_RW_ATTR(compress_percent);
1046 F2FS_SBI_GENERAL_RW_ATTR(compress_watermark);
1047 #endif
1048 /* atomic write */
1049 F2FS_SBI_GENERAL_RO_ATTR(current_atomic_write);
1050 F2FS_SBI_GENERAL_RW_ATTR(peak_atomic_write);
1051 F2FS_SBI_GENERAL_RW_ATTR(committed_atomic_block);
1052 F2FS_SBI_GENERAL_RW_ATTR(revoked_atomic_block);
1053 /* block age extent cache */
1054 F2FS_SBI_GENERAL_RW_ATTR(hot_data_age_threshold);
1055 F2FS_SBI_GENERAL_RW_ATTR(warm_data_age_threshold);
1056 F2FS_SBI_GENERAL_RW_ATTR(last_age_weight);
1057 #ifdef CONFIG_BLK_DEV_ZONED
1058 F2FS_SBI_GENERAL_RO_ATTR(unusable_blocks_per_sec);
1059 F2FS_SBI_GENERAL_RW_ATTR(blkzone_alloc_policy);
1060 #endif
1061
1062 /* STAT_INFO ATTR */
1063 #ifdef CONFIG_F2FS_STAT_FS
1064 STAT_INFO_RO_ATTR(cp_foreground_calls, cp_call_count[FOREGROUND]);
1065 STAT_INFO_RO_ATTR(cp_background_calls, cp_call_count[BACKGROUND]);
1066 STAT_INFO_RO_ATTR(gc_foreground_calls, gc_call_count[FOREGROUND]);
1067 STAT_INFO_RO_ATTR(gc_background_calls, gc_call_count[BACKGROUND]);
1068 #endif
1069
1070 /* FAULT_INFO ATTR */
1071 #ifdef CONFIG_F2FS_FAULT_INJECTION
1072 FAULT_INFO_GENERAL_RW_ATTR(FAULT_INFO_RATE, inject_rate);
1073 FAULT_INFO_GENERAL_RW_ATTR(FAULT_INFO_TYPE, inject_type);
1074 #endif
1075
1076 /* RESERVED_BLOCKS ATTR */
1077 RESERVED_BLOCKS_GENERAL_RW_ATTR(reserved_blocks);
1078
1079 /* CPRC_INFO ATTR */
1080 CPRC_INFO_GENERAL_RW_ATTR(ckpt_thread_ioprio);
1081
1082 /* ATGC_INFO ATTR */
1083 ATGC_INFO_RW_ATTR(atgc_candidate_ratio, candidate_ratio);
1084 ATGC_INFO_RW_ATTR(atgc_candidate_count, max_candidate_count);
1085 ATGC_INFO_RW_ATTR(atgc_age_weight, age_weight);
1086 ATGC_INFO_RW_ATTR(atgc_age_threshold, age_threshold);
1087
1088 F2FS_GENERAL_RO_ATTR(dirty_segments);
1089 F2FS_GENERAL_RO_ATTR(free_segments);
1090 F2FS_GENERAL_RO_ATTR(ovp_segments);
1091 F2FS_GENERAL_RO_ATTR(lifetime_write_kbytes);
1092 F2FS_GENERAL_RO_ATTR(features);
1093 F2FS_GENERAL_RO_ATTR(current_reserved_blocks);
1094 F2FS_GENERAL_RO_ATTR(unusable);
1095 F2FS_GENERAL_RO_ATTR(encoding);
1096 F2FS_GENERAL_RO_ATTR(mounted_time_sec);
1097 F2FS_GENERAL_RO_ATTR(main_blkaddr);
1098 F2FS_GENERAL_RO_ATTR(pending_discard);
1099 F2FS_GENERAL_RO_ATTR(atgc_enabled);
1100 F2FS_GENERAL_RO_ATTR(gc_mode);
1101 #ifdef CONFIG_F2FS_STAT_FS
1102 F2FS_GENERAL_RO_ATTR(moved_blocks_background);
1103 F2FS_GENERAL_RO_ATTR(moved_blocks_foreground);
1104 F2FS_GENERAL_RO_ATTR(avg_vblocks);
1105 #endif
1106
1107 #ifdef CONFIG_FS_ENCRYPTION
1108 F2FS_FEATURE_RO_ATTR(encryption);
1109 F2FS_FEATURE_RO_ATTR(test_dummy_encryption_v2);
1110 #if IS_ENABLED(CONFIG_UNICODE)
1111 F2FS_FEATURE_RO_ATTR(encrypted_casefold);
1112 #endif
1113 #endif /* CONFIG_FS_ENCRYPTION */
1114 #ifdef CONFIG_BLK_DEV_ZONED
1115 F2FS_FEATURE_RO_ATTR(block_zoned);
1116 #endif
1117 F2FS_FEATURE_RO_ATTR(atomic_write);
1118 F2FS_FEATURE_RO_ATTR(extra_attr);
1119 F2FS_FEATURE_RO_ATTR(project_quota);
1120 F2FS_FEATURE_RO_ATTR(inode_checksum);
1121 F2FS_FEATURE_RO_ATTR(flexible_inline_xattr);
1122 F2FS_FEATURE_RO_ATTR(quota_ino);
1123 F2FS_FEATURE_RO_ATTR(inode_crtime);
1124 F2FS_FEATURE_RO_ATTR(lost_found);
1125 #ifdef CONFIG_FS_VERITY
1126 F2FS_FEATURE_RO_ATTR(verity);
1127 #endif
1128 F2FS_FEATURE_RO_ATTR(sb_checksum);
1129 #if IS_ENABLED(CONFIG_UNICODE)
1130 F2FS_FEATURE_RO_ATTR(casefold);
1131 #endif
1132 F2FS_FEATURE_RO_ATTR(readonly);
1133 #ifdef CONFIG_F2FS_FS_COMPRESSION
1134 F2FS_FEATURE_RO_ATTR(compression);
1135 #endif
1136 F2FS_FEATURE_RO_ATTR(pin_file);
1137
1138 #define ATTR_LIST(name) (&f2fs_attr_##name.attr)
1139 static struct attribute *f2fs_attrs[] = {
1140         ATTR_LIST(gc_urgent_sleep_time),
1141         ATTR_LIST(gc_min_sleep_time),
1142         ATTR_LIST(gc_max_sleep_time),
1143         ATTR_LIST(gc_no_gc_sleep_time),
1144         ATTR_LIST(gc_no_zoned_gc_percent),
1145         ATTR_LIST(gc_boost_zoned_gc_percent),
1146         ATTR_LIST(gc_valid_thresh_ratio),
1147         ATTR_LIST(gc_idle),
1148         ATTR_LIST(gc_urgent),
1149         ATTR_LIST(reclaim_segments),
1150         ATTR_LIST(main_blkaddr),
1151         ATTR_LIST(max_small_discards),
1152         ATTR_LIST(max_discard_request),
1153         ATTR_LIST(min_discard_issue_time),
1154         ATTR_LIST(mid_discard_issue_time),
1155         ATTR_LIST(max_discard_issue_time),
1156         ATTR_LIST(discard_io_aware_gran),
1157         ATTR_LIST(discard_urgent_util),
1158         ATTR_LIST(discard_granularity),
1159         ATTR_LIST(max_ordered_discard),
1160         ATTR_LIST(discard_io_aware),
1161         ATTR_LIST(pending_discard),
1162         ATTR_LIST(gc_mode),
1163         ATTR_LIST(ipu_policy),
1164         ATTR_LIST(min_ipu_util),
1165         ATTR_LIST(min_fsync_blocks),
1166         ATTR_LIST(min_seq_blocks),
1167         ATTR_LIST(min_hot_blocks),
1168         ATTR_LIST(min_ssr_sections),
1169         ATTR_LIST(reserved_segments),
1170         ATTR_LIST(max_victim_search),
1171         ATTR_LIST(migration_granularity),
1172         ATTR_LIST(migration_window_granularity),
1173         ATTR_LIST(dir_level),
1174         ATTR_LIST(ram_thresh),
1175         ATTR_LIST(ra_nid_pages),
1176         ATTR_LIST(dirty_nats_ratio),
1177         ATTR_LIST(max_roll_forward_node_blocks),
1178         ATTR_LIST(cp_interval),
1179         ATTR_LIST(idle_interval),
1180         ATTR_LIST(discard_idle_interval),
1181         ATTR_LIST(gc_idle_interval),
1182         ATTR_LIST(umount_discard_timeout),
1183 #ifdef CONFIG_F2FS_IOSTAT
1184         ATTR_LIST(iostat_enable),
1185         ATTR_LIST(iostat_period_ms),
1186 #endif
1187         ATTR_LIST(readdir_ra),
1188         ATTR_LIST(max_io_bytes),
1189         ATTR_LIST(gc_pin_file_thresh),
1190         ATTR_LIST(extension_list),
1191 #ifdef CONFIG_F2FS_FAULT_INJECTION
1192         ATTR_LIST(inject_rate),
1193         ATTR_LIST(inject_type),
1194 #endif
1195         ATTR_LIST(data_io_flag),
1196         ATTR_LIST(node_io_flag),
1197         ATTR_LIST(gc_remaining_trials),
1198         ATTR_LIST(ckpt_thread_ioprio),
1199         ATTR_LIST(dirty_segments),
1200         ATTR_LIST(free_segments),
1201         ATTR_LIST(ovp_segments),
1202         ATTR_LIST(unusable),
1203         ATTR_LIST(lifetime_write_kbytes),
1204         ATTR_LIST(features),
1205         ATTR_LIST(reserved_blocks),
1206         ATTR_LIST(current_reserved_blocks),
1207         ATTR_LIST(encoding),
1208         ATTR_LIST(mounted_time_sec),
1209 #ifdef CONFIG_F2FS_STAT_FS
1210         ATTR_LIST(cp_foreground_calls),
1211         ATTR_LIST(cp_background_calls),
1212         ATTR_LIST(gc_foreground_calls),
1213         ATTR_LIST(gc_background_calls),
1214         ATTR_LIST(moved_blocks_foreground),
1215         ATTR_LIST(moved_blocks_background),
1216         ATTR_LIST(avg_vblocks),
1217 #endif
1218 #ifdef CONFIG_BLK_DEV_ZONED
1219         ATTR_LIST(unusable_blocks_per_sec),
1220         ATTR_LIST(blkzone_alloc_policy),
1221 #endif
1222 #ifdef CONFIG_F2FS_FS_COMPRESSION
1223         ATTR_LIST(compr_written_block),
1224         ATTR_LIST(compr_saved_block),
1225         ATTR_LIST(compr_new_inode),
1226         ATTR_LIST(compress_percent),
1227         ATTR_LIST(compress_watermark),
1228 #endif
1229         /* For ATGC */
1230         ATTR_LIST(atgc_candidate_ratio),
1231         ATTR_LIST(atgc_candidate_count),
1232         ATTR_LIST(atgc_age_weight),
1233         ATTR_LIST(atgc_age_threshold),
1234         ATTR_LIST(atgc_enabled),
1235         ATTR_LIST(seq_file_ra_mul),
1236         ATTR_LIST(gc_segment_mode),
1237         ATTR_LIST(gc_reclaimed_segments),
1238         ATTR_LIST(max_fragment_chunk),
1239         ATTR_LIST(max_fragment_hole),
1240         ATTR_LIST(current_atomic_write),
1241         ATTR_LIST(peak_atomic_write),
1242         ATTR_LIST(committed_atomic_block),
1243         ATTR_LIST(revoked_atomic_block),
1244         ATTR_LIST(hot_data_age_threshold),
1245         ATTR_LIST(warm_data_age_threshold),
1246         ATTR_LIST(last_age_weight),
1247         NULL,
1248 };
1249 ATTRIBUTE_GROUPS(f2fs);
1250
1251 static struct attribute *f2fs_feat_attrs[] = {
1252 #ifdef CONFIG_FS_ENCRYPTION
1253         ATTR_LIST(encryption),
1254         ATTR_LIST(test_dummy_encryption_v2),
1255 #if IS_ENABLED(CONFIG_UNICODE)
1256         ATTR_LIST(encrypted_casefold),
1257 #endif
1258 #endif /* CONFIG_FS_ENCRYPTION */
1259 #ifdef CONFIG_BLK_DEV_ZONED
1260         ATTR_LIST(block_zoned),
1261 #endif
1262         ATTR_LIST(atomic_write),
1263         ATTR_LIST(extra_attr),
1264         ATTR_LIST(project_quota),
1265         ATTR_LIST(inode_checksum),
1266         ATTR_LIST(flexible_inline_xattr),
1267         ATTR_LIST(quota_ino),
1268         ATTR_LIST(inode_crtime),
1269         ATTR_LIST(lost_found),
1270 #ifdef CONFIG_FS_VERITY
1271         ATTR_LIST(verity),
1272 #endif
1273         ATTR_LIST(sb_checksum),
1274 #if IS_ENABLED(CONFIG_UNICODE)
1275         ATTR_LIST(casefold),
1276 #endif
1277         ATTR_LIST(readonly),
1278 #ifdef CONFIG_F2FS_FS_COMPRESSION
1279         ATTR_LIST(compression),
1280 #endif
1281         ATTR_LIST(pin_file),
1282         NULL,
1283 };
1284 ATTRIBUTE_GROUPS(f2fs_feat);
1285
1286 F2FS_GENERAL_RO_ATTR(sb_status);
1287 F2FS_GENERAL_RO_ATTR(cp_status);
1288 F2FS_GENERAL_RO_ATTR(issued_discard);
1289 F2FS_GENERAL_RO_ATTR(queued_discard);
1290 F2FS_GENERAL_RO_ATTR(undiscard_blks);
1291
1292 static struct attribute *f2fs_stat_attrs[] = {
1293         ATTR_LIST(sb_status),
1294         ATTR_LIST(cp_status),
1295         ATTR_LIST(issued_discard),
1296         ATTR_LIST(queued_discard),
1297         ATTR_LIST(undiscard_blks),
1298         NULL,
1299 };
1300 ATTRIBUTE_GROUPS(f2fs_stat);
1301
1302 F2FS_SB_FEATURE_RO_ATTR(encryption, ENCRYPT);
1303 F2FS_SB_FEATURE_RO_ATTR(block_zoned, BLKZONED);
1304 F2FS_SB_FEATURE_RO_ATTR(extra_attr, EXTRA_ATTR);
1305 F2FS_SB_FEATURE_RO_ATTR(project_quota, PRJQUOTA);
1306 F2FS_SB_FEATURE_RO_ATTR(inode_checksum, INODE_CHKSUM);
1307 F2FS_SB_FEATURE_RO_ATTR(flexible_inline_xattr, FLEXIBLE_INLINE_XATTR);
1308 F2FS_SB_FEATURE_RO_ATTR(quota_ino, QUOTA_INO);
1309 F2FS_SB_FEATURE_RO_ATTR(inode_crtime, INODE_CRTIME);
1310 F2FS_SB_FEATURE_RO_ATTR(lost_found, LOST_FOUND);
1311 F2FS_SB_FEATURE_RO_ATTR(verity, VERITY);
1312 F2FS_SB_FEATURE_RO_ATTR(sb_checksum, SB_CHKSUM);
1313 F2FS_SB_FEATURE_RO_ATTR(casefold, CASEFOLD);
1314 F2FS_SB_FEATURE_RO_ATTR(compression, COMPRESSION);
1315 F2FS_SB_FEATURE_RO_ATTR(readonly, RO);
1316
1317 static struct attribute *f2fs_sb_feat_attrs[] = {
1318         ATTR_LIST(sb_encryption),
1319         ATTR_LIST(sb_block_zoned),
1320         ATTR_LIST(sb_extra_attr),
1321         ATTR_LIST(sb_project_quota),
1322         ATTR_LIST(sb_inode_checksum),
1323         ATTR_LIST(sb_flexible_inline_xattr),
1324         ATTR_LIST(sb_quota_ino),
1325         ATTR_LIST(sb_inode_crtime),
1326         ATTR_LIST(sb_lost_found),
1327         ATTR_LIST(sb_verity),
1328         ATTR_LIST(sb_sb_checksum),
1329         ATTR_LIST(sb_casefold),
1330         ATTR_LIST(sb_compression),
1331         ATTR_LIST(sb_readonly),
1332         NULL,
1333 };
1334 ATTRIBUTE_GROUPS(f2fs_sb_feat);
1335
1336 static const struct sysfs_ops f2fs_attr_ops = {
1337         .show   = f2fs_attr_show,
1338         .store  = f2fs_attr_store,
1339 };
1340
1341 static const struct kobj_type f2fs_sb_ktype = {
1342         .default_groups = f2fs_groups,
1343         .sysfs_ops      = &f2fs_attr_ops,
1344         .release        = f2fs_sb_release,
1345 };
1346
1347 static const struct kobj_type f2fs_ktype = {
1348         .sysfs_ops      = &f2fs_attr_ops,
1349 };
1350
1351 static struct kset f2fs_kset = {
1352         .kobj   = {.ktype = &f2fs_ktype},
1353 };
1354
1355 static const struct kobj_type f2fs_feat_ktype = {
1356         .default_groups = f2fs_feat_groups,
1357         .sysfs_ops      = &f2fs_attr_ops,
1358 };
1359
1360 static struct kobject f2fs_feat = {
1361         .kset   = &f2fs_kset,
1362 };
1363
1364 static ssize_t f2fs_stat_attr_show(struct kobject *kobj,
1365                                 struct attribute *attr, char *buf)
1366 {
1367         struct f2fs_sb_info *sbi = container_of(kobj, struct f2fs_sb_info,
1368                                                                 s_stat_kobj);
1369         struct f2fs_attr *a = container_of(attr, struct f2fs_attr, attr);
1370
1371         return a->show ? a->show(a, sbi, buf) : 0;
1372 }
1373
1374 static ssize_t f2fs_stat_attr_store(struct kobject *kobj, struct attribute *attr,
1375                                                 const char *buf, size_t len)
1376 {
1377         struct f2fs_sb_info *sbi = container_of(kobj, struct f2fs_sb_info,
1378                                                                 s_stat_kobj);
1379         struct f2fs_attr *a = container_of(attr, struct f2fs_attr, attr);
1380
1381         return a->store ? a->store(a, sbi, buf, len) : 0;
1382 }
1383
1384 static void f2fs_stat_kobj_release(struct kobject *kobj)
1385 {
1386         struct f2fs_sb_info *sbi = container_of(kobj, struct f2fs_sb_info,
1387                                                                 s_stat_kobj);
1388         complete(&sbi->s_stat_kobj_unregister);
1389 }
1390
1391 static const struct sysfs_ops f2fs_stat_attr_ops = {
1392         .show   = f2fs_stat_attr_show,
1393         .store  = f2fs_stat_attr_store,
1394 };
1395
1396 static const struct kobj_type f2fs_stat_ktype = {
1397         .default_groups = f2fs_stat_groups,
1398         .sysfs_ops      = &f2fs_stat_attr_ops,
1399         .release        = f2fs_stat_kobj_release,
1400 };
1401
1402 static ssize_t f2fs_sb_feat_attr_show(struct kobject *kobj,
1403                                 struct attribute *attr, char *buf)
1404 {
1405         struct f2fs_sb_info *sbi = container_of(kobj, struct f2fs_sb_info,
1406                                                         s_feature_list_kobj);
1407         struct f2fs_attr *a = container_of(attr, struct f2fs_attr, attr);
1408
1409         return a->show ? a->show(a, sbi, buf) : 0;
1410 }
1411
1412 static void f2fs_feature_list_kobj_release(struct kobject *kobj)
1413 {
1414         struct f2fs_sb_info *sbi = container_of(kobj, struct f2fs_sb_info,
1415                                                         s_feature_list_kobj);
1416         complete(&sbi->s_feature_list_kobj_unregister);
1417 }
1418
1419 static const struct sysfs_ops f2fs_feature_list_attr_ops = {
1420         .show   = f2fs_sb_feat_attr_show,
1421 };
1422
1423 static const struct kobj_type f2fs_feature_list_ktype = {
1424         .default_groups = f2fs_sb_feat_groups,
1425         .sysfs_ops      = &f2fs_feature_list_attr_ops,
1426         .release        = f2fs_feature_list_kobj_release,
1427 };
1428
1429 static int __maybe_unused segment_info_seq_show(struct seq_file *seq,
1430                                                 void *offset)
1431 {
1432         struct super_block *sb = seq->private;
1433         struct f2fs_sb_info *sbi = F2FS_SB(sb);
1434         unsigned int total_segs =
1435                         le32_to_cpu(sbi->raw_super->segment_count_main);
1436         int i;
1437
1438         seq_puts(seq, "format: segment_type|valid_blocks\n"
1439                 "segment_type(0:HD, 1:WD, 2:CD, 3:HN, 4:WN, 5:CN)\n");
1440
1441         for (i = 0; i < total_segs; i++) {
1442                 struct seg_entry *se = get_seg_entry(sbi, i);
1443
1444                 if ((i % 10) == 0)
1445                         seq_printf(seq, "%-10d", i);
1446                 seq_printf(seq, "%d|%-3u", se->type, se->valid_blocks);
1447                 if ((i % 10) == 9 || i == (total_segs - 1))
1448                         seq_putc(seq, '\n');
1449                 else
1450                         seq_putc(seq, ' ');
1451         }
1452
1453         return 0;
1454 }
1455
1456 static int __maybe_unused segment_bits_seq_show(struct seq_file *seq,
1457                                                 void *offset)
1458 {
1459         struct super_block *sb = seq->private;
1460         struct f2fs_sb_info *sbi = F2FS_SB(sb);
1461         unsigned int total_segs =
1462                         le32_to_cpu(sbi->raw_super->segment_count_main);
1463         int i, j;
1464
1465         seq_puts(seq, "format: segment_type|valid_blocks|bitmaps\n"
1466                 "segment_type(0:HD, 1:WD, 2:CD, 3:HN, 4:WN, 5:CN)\n");
1467
1468         for (i = 0; i < total_segs; i++) {
1469                 struct seg_entry *se = get_seg_entry(sbi, i);
1470
1471                 seq_printf(seq, "%-10d", i);
1472                 seq_printf(seq, "%d|%-3u|", se->type, se->valid_blocks);
1473                 for (j = 0; j < SIT_VBLOCK_MAP_SIZE; j++)
1474                         seq_printf(seq, " %.2x", se->cur_valid_map[j]);
1475                 seq_putc(seq, '\n');
1476         }
1477         return 0;
1478 }
1479
1480 static int __maybe_unused victim_bits_seq_show(struct seq_file *seq,
1481                                                 void *offset)
1482 {
1483         struct super_block *sb = seq->private;
1484         struct f2fs_sb_info *sbi = F2FS_SB(sb);
1485         struct dirty_seglist_info *dirty_i = DIRTY_I(sbi);
1486         int i;
1487
1488         seq_puts(seq, "format: victim_secmap bitmaps\n");
1489
1490         for (i = 0; i < MAIN_SECS(sbi); i++) {
1491                 if ((i % 10) == 0)
1492                         seq_printf(seq, "%-10d", i);
1493                 seq_printf(seq, "%d", test_bit(i, dirty_i->victim_secmap) ? 1 : 0);
1494                 if ((i % 10) == 9 || i == (MAIN_SECS(sbi) - 1))
1495                         seq_putc(seq, '\n');
1496                 else
1497                         seq_putc(seq, ' ');
1498         }
1499         return 0;
1500 }
1501
1502 static int __maybe_unused discard_plist_seq_show(struct seq_file *seq,
1503                                                 void *offset)
1504 {
1505         struct super_block *sb = seq->private;
1506         struct f2fs_sb_info *sbi = F2FS_SB(sb);
1507         struct discard_cmd_control *dcc = SM_I(sbi)->dcc_info;
1508         int i, count;
1509
1510         seq_puts(seq, "Discard pend list(Show diacrd_cmd count on each entry, .:not exist):\n");
1511         if (!f2fs_realtime_discard_enable(sbi))
1512                 return 0;
1513
1514         if (dcc) {
1515                 mutex_lock(&dcc->cmd_lock);
1516                 for (i = 0; i < MAX_PLIST_NUM; i++) {
1517                         struct list_head *pend_list;
1518                         struct discard_cmd *dc, *tmp;
1519
1520                         if (i % 8 == 0)
1521                                 seq_printf(seq, "  %-3d", i);
1522                         count = 0;
1523                         pend_list = &dcc->pend_list[i];
1524                         list_for_each_entry_safe(dc, tmp, pend_list, list)
1525                                 count++;
1526                         if (count)
1527                                 seq_printf(seq, " %7d", count);
1528                         else
1529                                 seq_puts(seq, "       .");
1530                         if (i % 8 == 7)
1531                                 seq_putc(seq, '\n');
1532                 }
1533                 seq_putc(seq, '\n');
1534                 mutex_unlock(&dcc->cmd_lock);
1535         }
1536
1537         return 0;
1538 }
1539
1540 static int __maybe_unused disk_map_seq_show(struct seq_file *seq,
1541                                                 void *offset)
1542 {
1543         struct super_block *sb = seq->private;
1544         struct f2fs_sb_info *sbi = F2FS_SB(sb);
1545         int i;
1546
1547         seq_printf(seq, "Address Layout   : %5luB Block address (# of Segments)\n",
1548                                         F2FS_BLKSIZE);
1549         seq_printf(seq, " SB            : %12s\n", "0/1024B");
1550         seq_printf(seq, " seg0_blkaddr  : 0x%010x\n", SEG0_BLKADDR(sbi));
1551         seq_printf(seq, " Checkpoint    : 0x%010x (%10d)\n",
1552                         le32_to_cpu(F2FS_RAW_SUPER(sbi)->cp_blkaddr), 2);
1553         seq_printf(seq, " SIT           : 0x%010x (%10d)\n",
1554                         SIT_I(sbi)->sit_base_addr,
1555                         le32_to_cpu(F2FS_RAW_SUPER(sbi)->segment_count_sit));
1556         seq_printf(seq, " NAT           : 0x%010x (%10d)\n",
1557                         NM_I(sbi)->nat_blkaddr,
1558                         le32_to_cpu(F2FS_RAW_SUPER(sbi)->segment_count_nat));
1559         seq_printf(seq, " SSA           : 0x%010x (%10d)\n",
1560                         SM_I(sbi)->ssa_blkaddr,
1561                         le32_to_cpu(F2FS_RAW_SUPER(sbi)->segment_count_ssa));
1562         seq_printf(seq, " Main          : 0x%010x (%10d)\n",
1563                         SM_I(sbi)->main_blkaddr,
1564                         le32_to_cpu(F2FS_RAW_SUPER(sbi)->segment_count_main));
1565         seq_printf(seq, " # of Sections : %12d\n",
1566                         le32_to_cpu(F2FS_RAW_SUPER(sbi)->section_count));
1567         seq_printf(seq, " Segs/Sections : %12d\n",
1568                         SEGS_PER_SEC(sbi));
1569         seq_printf(seq, " Section size  : %12d MB\n",
1570                         SEGS_PER_SEC(sbi) << 1);
1571
1572         if (!f2fs_is_multi_device(sbi))
1573                 return 0;
1574
1575         seq_puts(seq, "\nDisk Map for multi devices:\n");
1576         for (i = 0; i < sbi->s_ndevs; i++)
1577                 seq_printf(seq, "Disk:%2d (zoned=%d): 0x%010x - 0x%010x on %s\n",
1578                         i, bdev_is_zoned(FDEV(i).bdev),
1579                         FDEV(i).start_blk, FDEV(i).end_blk,
1580                         FDEV(i).path);
1581         return 0;
1582 }
1583
1584 int __init f2fs_init_sysfs(void)
1585 {
1586         int ret;
1587
1588         kobject_set_name(&f2fs_kset.kobj, "f2fs");
1589         f2fs_kset.kobj.parent = fs_kobj;
1590         ret = kset_register(&f2fs_kset);
1591         if (ret)
1592                 return ret;
1593
1594         ret = kobject_init_and_add(&f2fs_feat, &f2fs_feat_ktype,
1595                                    NULL, "features");
1596         if (ret)
1597                 goto put_kobject;
1598
1599         f2fs_proc_root = proc_mkdir("fs/f2fs", NULL);
1600         if (!f2fs_proc_root) {
1601                 ret = -ENOMEM;
1602                 goto put_kobject;
1603         }
1604
1605         return 0;
1606 put_kobject:
1607         kobject_put(&f2fs_feat);
1608         kset_unregister(&f2fs_kset);
1609         return ret;
1610 }
1611
1612 void f2fs_exit_sysfs(void)
1613 {
1614         kobject_put(&f2fs_feat);
1615         kset_unregister(&f2fs_kset);
1616         remove_proc_entry("fs/f2fs", NULL);
1617         f2fs_proc_root = NULL;
1618 }
1619
1620 int f2fs_register_sysfs(struct f2fs_sb_info *sbi)
1621 {
1622         struct super_block *sb = sbi->sb;
1623         int err;
1624
1625         sbi->s_kobj.kset = &f2fs_kset;
1626         init_completion(&sbi->s_kobj_unregister);
1627         err = kobject_init_and_add(&sbi->s_kobj, &f2fs_sb_ktype, NULL,
1628                                 "%s", sb->s_id);
1629         if (err)
1630                 goto put_sb_kobj;
1631
1632         sbi->s_stat_kobj.kset = &f2fs_kset;
1633         init_completion(&sbi->s_stat_kobj_unregister);
1634         err = kobject_init_and_add(&sbi->s_stat_kobj, &f2fs_stat_ktype,
1635                                                 &sbi->s_kobj, "stat");
1636         if (err)
1637                 goto put_stat_kobj;
1638
1639         sbi->s_feature_list_kobj.kset = &f2fs_kset;
1640         init_completion(&sbi->s_feature_list_kobj_unregister);
1641         err = kobject_init_and_add(&sbi->s_feature_list_kobj,
1642                                         &f2fs_feature_list_ktype,
1643                                         &sbi->s_kobj, "feature_list");
1644         if (err)
1645                 goto put_feature_list_kobj;
1646
1647         sbi->s_proc = proc_mkdir(sb->s_id, f2fs_proc_root);
1648         if (!sbi->s_proc) {
1649                 err = -ENOMEM;
1650                 goto put_feature_list_kobj;
1651         }
1652
1653         proc_create_single_data("segment_info", 0444, sbi->s_proc,
1654                                 segment_info_seq_show, sb);
1655         proc_create_single_data("segment_bits", 0444, sbi->s_proc,
1656                                 segment_bits_seq_show, sb);
1657 #ifdef CONFIG_F2FS_IOSTAT
1658         proc_create_single_data("iostat_info", 0444, sbi->s_proc,
1659                                 iostat_info_seq_show, sb);
1660 #endif
1661         proc_create_single_data("victim_bits", 0444, sbi->s_proc,
1662                                 victim_bits_seq_show, sb);
1663         proc_create_single_data("discard_plist_info", 0444, sbi->s_proc,
1664                                 discard_plist_seq_show, sb);
1665         proc_create_single_data("disk_map", 0444, sbi->s_proc,
1666                                 disk_map_seq_show, sb);
1667         return 0;
1668 put_feature_list_kobj:
1669         kobject_put(&sbi->s_feature_list_kobj);
1670         wait_for_completion(&sbi->s_feature_list_kobj_unregister);
1671 put_stat_kobj:
1672         kobject_put(&sbi->s_stat_kobj);
1673         wait_for_completion(&sbi->s_stat_kobj_unregister);
1674 put_sb_kobj:
1675         kobject_put(&sbi->s_kobj);
1676         wait_for_completion(&sbi->s_kobj_unregister);
1677         return err;
1678 }
1679
1680 void f2fs_unregister_sysfs(struct f2fs_sb_info *sbi)
1681 {
1682         remove_proc_subtree(sbi->sb->s_id, f2fs_proc_root);
1683
1684         kobject_put(&sbi->s_stat_kobj);
1685         wait_for_completion(&sbi->s_stat_kobj_unregister);
1686         kobject_put(&sbi->s_feature_list_kobj);
1687         wait_for_completion(&sbi->s_feature_list_kobj_unregister);
1688
1689         kobject_put(&sbi->s_kobj);
1690         wait_for_completion(&sbi->s_kobj_unregister);
1691 }