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 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 gc_mode_show(struct f2fs_attr *a,
 147                 struct f2fs_sb_info *sbi, char *buf)
 148 {
 149         return sysfs_emit(buf, "%s\n", gc_mode_names[sbi->gc_mode]);
 150 }
 151
 152 static ssize_t features_show(struct f2fs_attr *a,
 153                 struct f2fs_sb_info *sbi, char *buf)
 154 {
 155         int len = 0;
 156
 157         if (f2fs_sb_has_encrypt(sbi))
 158                 len += scnprintf(buf, PAGE_SIZE - len, "%s",
 159                                                 "encryption");
 160         if (f2fs_sb_has_blkzoned(sbi))
 161                 len += scnprintf(buf + len, PAGE_SIZE - len, "%s%s",
 162                                 len ? ", " : "", "blkzoned");
 163         if (f2fs_sb_has_extra_attr(sbi))
 164                 len += scnprintf(buf + len, PAGE_SIZE - len, "%s%s",
 165                                 len ? ", " : "", "extra_attr");
 166         if (f2fs_sb_has_project_quota(sbi))
 167                 len += scnprintf(buf + len, PAGE_SIZE - len, "%s%s",
 168                                 len ? ", " : "", "projquota");
 169         if (f2fs_sb_has_inode_chksum(sbi))
 170                 len += scnprintf(buf + len, PAGE_SIZE - len, "%s%s",
 171                                 len ? ", " : "", "inode_checksum");
 172         if (f2fs_sb_has_flexible_inline_xattr(sbi))
 173                 len += scnprintf(buf + len, PAGE_SIZE - len, "%s%s",
 174                                 len ? ", " : "", "flexible_inline_xattr");
 175         if (f2fs_sb_has_quota_ino(sbi))
 176                 len += scnprintf(buf + len, PAGE_SIZE - len, "%s%s",
 177                                 len ? ", " : "", "quota_ino");
 178         if (f2fs_sb_has_inode_crtime(sbi))
 179                 len += scnprintf(buf + len, PAGE_SIZE - len, "%s%s",
 180                                 len ? ", " : "", "inode_crtime");
 181         if (f2fs_sb_has_lost_found(sbi))
 182                 len += scnprintf(buf + len, PAGE_SIZE - len, "%s%s",
 183                                 len ? ", " : "", "lost_found");
 184         if (f2fs_sb_has_verity(sbi))
 185                 len += scnprintf(buf + len, PAGE_SIZE - len, "%s%s",
 186                                 len ? ", " : "", "verity");
 187         if (f2fs_sb_has_sb_chksum(sbi))
 188                 len += scnprintf(buf + len, PAGE_SIZE - len, "%s%s",
 189                                 len ? ", " : "", "sb_checksum");
 190         if (f2fs_sb_has_casefold(sbi))
 191                 len += scnprintf(buf + len, PAGE_SIZE - len, "%s%s",
 192                                 len ? ", " : "", "casefold");
 193         if (f2fs_sb_has_readonly(sbi))
 194                 len += scnprintf(buf + len, PAGE_SIZE - len, "%s%s",
 195                                 len ? ", " : "", "readonly");
 196         if (f2fs_sb_has_compression(sbi))
 197                 len += scnprintf(buf + len, PAGE_SIZE - len, "%s%s",
 198                                 len ? ", " : "", "compression");
 199         len += scnprintf(buf + len, PAGE_SIZE - len, "%s%s",
 200                                 len ? ", " : "", "pin_file");
 201         len += scnprintf(buf + len, PAGE_SIZE - len, "\n");
 202         return len;
 203 }
 204
 205 static ssize_t current_reserved_blocks_show(struct f2fs_attr *a,
 206                                         struct f2fs_sb_info *sbi, char *buf)
 207 {
 208         return sysfs_emit(buf, "%u\n", sbi->current_reserved_blocks);
 209 }
 210
 211 static ssize_t unusable_show(struct f2fs_attr *a,
 212                 struct f2fs_sb_info *sbi, char *buf)
 213 {
 214         block_t unusable;
 215
 216         if (test_opt(sbi, DISABLE_CHECKPOINT))
 217                 unusable = sbi->unusable_block_count;
 218         else
 219                 unusable = f2fs_get_unusable_blocks(sbi);
 220         return sysfs_emit(buf, "%llu\n", (unsigned long long)unusable);
 221 }
 222
 223 static ssize_t encoding_show(struct f2fs_attr *a,
 224                 struct f2fs_sb_info *sbi, char *buf)
 225 {
 226 #if IS_ENABLED(CONFIG_UNICODE)
 227         struct super_block *sb = sbi->sb;
 228
 229         if (f2fs_sb_has_casefold(sbi))
 230                 return sysfs_emit(buf, "UTF-8 (%d.%d.%d)\n",
 231                         (sb->s_encoding->version >> 16) & 0xff,
 232                         (sb->s_encoding->version >> 8) & 0xff,
 233                         sb->s_encoding->version & 0xff);
 234 #endif
 235         return sysfs_emit(buf, "(none)\n");
 236 }
 237
 238 static ssize_t mounted_time_sec_show(struct f2fs_attr *a,
 239                 struct f2fs_sb_info *sbi, char *buf)
 240 {
 241         return sysfs_emit(buf, "%llu\n", SIT_I(sbi)->mounted_time);
 242 }
 243
 244 #ifdef CONFIG_F2FS_STAT_FS
 245 static ssize_t moved_blocks_foreground_show(struct f2fs_attr *a,
 246                                 struct f2fs_sb_info *sbi, char *buf)
 247 {
 248         struct f2fs_stat_info *si = F2FS_STAT(sbi);
 249
 250         return sysfs_emit(buf, "%llu\n",
 251                 (unsigned long long)(si->tot_blks -
 252                         (si->bg_data_blks + si->bg_node_blks)));
 253 }
 254
 255 static ssize_t moved_blocks_background_show(struct f2fs_attr *a,
 256                                 struct f2fs_sb_info *sbi, char *buf)
 257 {
 258         struct f2fs_stat_info *si = F2FS_STAT(sbi);
 259
 260         return sysfs_emit(buf, "%llu\n",
 261                 (unsigned long long)(si->bg_data_blks + si->bg_node_blks));
 262 }
 263
 264 static ssize_t avg_vblocks_show(struct f2fs_attr *a,
 265                 struct f2fs_sb_info *sbi, char *buf)
 266 {
 267         struct f2fs_stat_info *si = F2FS_STAT(sbi);
 268
 269         si->dirty_count = dirty_segments(sbi);
 270         f2fs_update_sit_info(sbi);
 271         return sysfs_emit(buf, "%llu\n", (unsigned long long)(si->avg_vblocks));
 272 }
 273 #endif
 274
 275 static ssize_t main_blkaddr_show(struct f2fs_attr *a,
 276                                 struct f2fs_sb_info *sbi, char *buf)
 277 {
 278         return sysfs_emit(buf, "%llu\n",
 279                         (unsigned long long)MAIN_BLKADDR(sbi));
 280 }
 281
 282 static ssize_t f2fs_sbi_show(struct f2fs_attr *a,
 283                         struct f2fs_sb_info *sbi, char *buf)
 284 {
 285         unsigned char *ptr = NULL;
 286         unsigned int *ui;
 287
 288         ptr = __struct_ptr(sbi, a->struct_type);
 289         if (!ptr)
 290                 return -EINVAL;
 291
 292         if (!strcmp(a->attr.name, "extension_list")) {
 293                 __u8 (*extlist)[F2FS_EXTENSION_LEN] =
 294                                         sbi->raw_super->extension_list;
 295                 int cold_count = le32_to_cpu(sbi->raw_super->extension_count);
 296                 int hot_count = sbi->raw_super->hot_ext_count;
 297                 int len = 0, i;
 298
 299                 len += scnprintf(buf + len, PAGE_SIZE - len,
 300                                                 "cold file extension:\n");
 301                 for (i = 0; i < cold_count; i++)
 302                         len += scnprintf(buf + len, PAGE_SIZE - len, "%s\n",
 303                                                                 extlist[i]);
 304
 305                 len += scnprintf(buf + len, PAGE_SIZE - len,
 306                                                 "hot file extension:\n");
 307                 for (i = cold_count; i < cold_count + hot_count; i++)
 308                         len += scnprintf(buf + len, PAGE_SIZE - len, "%s\n",
 309                                                                 extlist[i]);
 310                 return len;
 311         }
 312
 313         if (!strcmp(a->attr.name, "ckpt_thread_ioprio")) {
 314                 struct ckpt_req_control *cprc = &sbi->cprc_info;
 315                 int len = 0;
 316                 int class = IOPRIO_PRIO_CLASS(cprc->ckpt_thread_ioprio);
 317                 int data = IOPRIO_PRIO_DATA(cprc->ckpt_thread_ioprio);
 318
 319                 if (class == IOPRIO_CLASS_RT)
 320                         len += scnprintf(buf + len, PAGE_SIZE - len, "rt,");
 321                 else if (class == IOPRIO_CLASS_BE)
 322                         len += scnprintf(buf + len, PAGE_SIZE - len, "be,");
 323                 else
 324                         return -EINVAL;
 325
 326                 len += scnprintf(buf + len, PAGE_SIZE - len, "%d\n", data);
 327                 return len;
 328         }
 329
 330 #ifdef CONFIG_F2FS_FS_COMPRESSION
 331         if (!strcmp(a->attr.name, "compr_written_block"))
 332                 return sysfs_emit(buf, "%llu\n", sbi->compr_written_block);
 333
 334         if (!strcmp(a->attr.name, "compr_saved_block"))
 335                 return sysfs_emit(buf, "%llu\n", sbi->compr_saved_block);
 336
 337         if (!strcmp(a->attr.name, "compr_new_inode"))
 338                 return sysfs_emit(buf, "%u\n", sbi->compr_new_inode);
 339 #endif
 340
 341         if (!strcmp(a->attr.name, "gc_segment_mode"))
 342                 return sysfs_emit(buf, "%u\n", sbi->gc_segment_mode);
 343
 344         if (!strcmp(a->attr.name, "gc_reclaimed_segments")) {
 345                 return sysfs_emit(buf, "%u\n",
 346                         sbi->gc_reclaimed_segs[sbi->gc_segment_mode]);
 347         }
 348
 349         if (!strcmp(a->attr.name, "current_atomic_write")) {
 350                 s64 current_write = atomic64_read(&sbi->current_atomic_write);
 351
 352                 return sysfs_emit(buf, "%lld\n", current_write);
 353         }
 354
 355         if (!strcmp(a->attr.name, "peak_atomic_write"))
 356                 return sysfs_emit(buf, "%lld\n", sbi->peak_atomic_write);
 357
 358         if (!strcmp(a->attr.name, "committed_atomic_block"))
 359                 return sysfs_emit(buf, "%llu\n", sbi->committed_atomic_block);
 360
 361         if (!strcmp(a->attr.name, "revoked_atomic_block"))
 362                 return sysfs_emit(buf, "%llu\n", sbi->revoked_atomic_block);
 363
 364         ui = (unsigned int *)(ptr + a->offset);
 365
 366         return sysfs_emit(buf, "%u\n", *ui);
 367 }
 368
 369 static ssize_t __sbi_store(struct f2fs_attr *a,
 370                         struct f2fs_sb_info *sbi,
 371                         const char *buf, size_t count)
 372 {
 373         unsigned char *ptr;
 374         unsigned long t;
 375         unsigned int *ui;
 376         ssize_t ret;
 377
 378         ptr = __struct_ptr(sbi, a->struct_type);
 379         if (!ptr)
 380                 return -EINVAL;
 381
 382         if (!strcmp(a->attr.name, "extension_list")) {
 383                 const char *name = strim((char *)buf);
 384                 bool set = true, hot;
 385
 386                 if (!strncmp(name, "[h]", 3))
 387                         hot = true;
 388                 else if (!strncmp(name, "[c]", 3))
 389                         hot = false;
 390                 else
 391                         return -EINVAL;
 392
 393                 name += 3;
 394
 395                 if (*name == '!') {
 396                         name++;
 397                         set = false;
 398                 }
 399
 400                 if (!strlen(name) || strlen(name) >= F2FS_EXTENSION_LEN)
 401                         return -EINVAL;
 402
 403                 f2fs_down_write(&sbi->sb_lock);
 404
 405                 ret = f2fs_update_extension_list(sbi, name, hot, set);
 406                 if (ret)
 407                         goto out;
 408
 409                 ret = f2fs_commit_super(sbi, false);
 410                 if (ret)
 411                         f2fs_update_extension_list(sbi, name, hot, !set);
 412 out:
 413                 f2fs_up_write(&sbi->sb_lock);
 414                 return ret ? ret : count;
 415         }
 416
 417         if (!strcmp(a->attr.name, "ckpt_thread_ioprio")) {
 418                 const char *name = strim((char *)buf);
 419                 struct ckpt_req_control *cprc = &sbi->cprc_info;
 420                 int class;
 421                 long data;
 422                 int ret;
 423
 424                 if (!strncmp(name, "rt,", 3))
 425                         class = IOPRIO_CLASS_RT;
 426                 else if (!strncmp(name, "be,", 3))
 427                         class = IOPRIO_CLASS_BE;
 428                 else
 429                         return -EINVAL;
 430
 431                 name += 3;
 432                 ret = kstrtol(name, 10, &data);
 433                 if (ret)
 434                         return ret;
 435                 if (data >= IOPRIO_NR_LEVELS || data < 0)
 436                         return -EINVAL;
 437
 438                 cprc->ckpt_thread_ioprio = IOPRIO_PRIO_VALUE(class, data);
 439                 if (test_opt(sbi, MERGE_CHECKPOINT)) {
 440                         ret = set_task_ioprio(cprc->f2fs_issue_ckpt,
 441                                         cprc->ckpt_thread_ioprio);
 442                         if (ret)
 443                                 return ret;
 444                 }
 445
 446                 return count;
 447         }
 448
 449         ui = (unsigned int *)(ptr + a->offset);
 450
 451         ret = kstrtoul(skip_spaces(buf), 0, &t);
 452         if (ret < 0)
 453                 return ret;
 454 #ifdef CONFIG_F2FS_FAULT_INJECTION
 455         if (a->struct_type == FAULT_INFO_TYPE && t >= (1 << FAULT_MAX))
 456                 return -EINVAL;
 457         if (a->struct_type == FAULT_INFO_RATE && t >= UINT_MAX)
 458                 return -EINVAL;
 459 #endif
 460         if (a->struct_type == RESERVED_BLOCKS) {
 461                 spin_lock(&sbi->stat_lock);
 462                 if (t > (unsigned long)(sbi->user_block_count -
 463                                 F2FS_OPTION(sbi).root_reserved_blocks -
 464                                 sbi->blocks_per_seg *
 465                                 SM_I(sbi)->additional_reserved_segments)) {
 466                         spin_unlock(&sbi->stat_lock);
 467                         return -EINVAL;
 468                 }
 469                 *ui = t;
 470                 sbi->current_reserved_blocks = min(sbi->reserved_blocks,
 471                                 sbi->user_block_count - valid_user_blocks(sbi));
 472                 spin_unlock(&sbi->stat_lock);
 473                 return count;
 474         }
 475
 476         if (!strcmp(a->attr.name, "discard_granularity")) {
 477                 if (t == 0 || t > MAX_PLIST_NUM)
 478                         return -EINVAL;
 479                 if (!f2fs_block_unit_discard(sbi))
 480                         return -EINVAL;
 481                 if (t == *ui)
 482                         return count;
 483                 *ui = t;
 484                 return count;
 485         }
 486
 487         if (!strcmp(a->attr.name, "max_ordered_discard")) {
 488                 if (t == 0 || t > MAX_PLIST_NUM)
 489                         return -EINVAL;
 490                 if (!f2fs_block_unit_discard(sbi))
 491                         return -EINVAL;
 492                 *ui = t;
 493                 return count;
 494         }
 495
 496         if (!strcmp(a->attr.name, "discard_urgent_util")) {
 497                 if (t > 100)
 498                         return -EINVAL;
 499                 *ui = t;
 500                 return count;
 501         }
 502
 503         if (!strcmp(a->attr.name, "migration_granularity")) {
 504                 if (t == 0 || t > sbi->segs_per_sec)
 505                         return -EINVAL;
 506         }
 507
 508         if (!strcmp(a->attr.name, "gc_urgent")) {
 509                 if (t == 0) {
 510                         sbi->gc_mode = GC_NORMAL;
 511                 } else if (t == 1) {
 512                         sbi->gc_mode = GC_URGENT_HIGH;
 513                         if (sbi->gc_thread) {
 514                                 sbi->gc_thread->gc_wake = 1;
 515                                 wake_up_interruptible_all(
 516                                         &sbi->gc_thread->gc_wait_queue_head);
 517                                 wake_up_discard_thread(sbi, true);
 518                         }
 519                 } else if (t == 2) {
 520                         sbi->gc_mode = GC_URGENT_LOW;
 521                 } else if (t == 3) {
 522                         sbi->gc_mode = GC_URGENT_MID;
 523                         if (sbi->gc_thread) {
 524                                 sbi->gc_thread->gc_wake = 1;
 525                                 wake_up_interruptible_all(
 526                                         &sbi->gc_thread->gc_wait_queue_head);
 527                         }
 528                 } else {
 529                         return -EINVAL;
 530                 }
 531                 return count;
 532         }
 533         if (!strcmp(a->attr.name, "gc_idle")) {
 534                 if (t == GC_IDLE_CB) {
 535                         sbi->gc_mode = GC_IDLE_CB;
 536                 } else if (t == GC_IDLE_GREEDY) {
 537                         sbi->gc_mode = GC_IDLE_GREEDY;
 538                 } else if (t == GC_IDLE_AT) {
 539                         if (!sbi->am.atgc_enabled)
 540                                 return -EINVAL;
 541                         sbi->gc_mode = GC_IDLE_AT;
 542                 } else {
 543                         sbi->gc_mode = GC_NORMAL;
 544                 }
 545                 return count;
 546         }
 547
 548         if (!strcmp(a->attr.name, "gc_remaining_trials")) {
 549                 spin_lock(&sbi->gc_remaining_trials_lock);
 550                 sbi->gc_remaining_trials = t;
 551                 spin_unlock(&sbi->gc_remaining_trials_lock);
 552
 553                 return count;
 554         }
 555
 556 #ifdef CONFIG_F2FS_IOSTAT
 557         if (!strcmp(a->attr.name, "iostat_enable")) {
 558                 sbi->iostat_enable = !!t;
 559                 if (!sbi->iostat_enable)
 560                         f2fs_reset_iostat(sbi);
 561                 return count;
 562         }
 563
 564         if (!strcmp(a->attr.name, "iostat_period_ms")) {
 565                 if (t < MIN_IOSTAT_PERIOD_MS || t > MAX_IOSTAT_PERIOD_MS)
 566                         return -EINVAL;
 567                 spin_lock(&sbi->iostat_lock);
 568                 sbi->iostat_period_ms = (unsigned int)t;
 569                 spin_unlock(&sbi->iostat_lock);
 570                 return count;
 571         }
 572 #endif
 573
 574 #ifdef CONFIG_F2FS_FS_COMPRESSION
 575         if (!strcmp(a->attr.name, "compr_written_block") ||
 576                 !strcmp(a->attr.name, "compr_saved_block")) {
 577                 if (t != 0)
 578                         return -EINVAL;
 579                 sbi->compr_written_block = 0;
 580                 sbi->compr_saved_block = 0;
 581                 return count;
 582         }
 583
 584         if (!strcmp(a->attr.name, "compr_new_inode")) {
 585                 if (t != 0)
 586                         return -EINVAL;
 587                 sbi->compr_new_inode = 0;
 588                 return count;
 589         }
 590 #endif
 591
 592         if (!strcmp(a->attr.name, "atgc_candidate_ratio")) {
 593                 if (t > 100)
 594                         return -EINVAL;
 595                 sbi->am.candidate_ratio = t;
 596                 return count;
 597         }
 598
 599         if (!strcmp(a->attr.name, "atgc_age_weight")) {
 600                 if (t > 100)
 601                         return -EINVAL;
 602                 sbi->am.age_weight = t;
 603                 return count;
 604         }
 605
 606         if (!strcmp(a->attr.name, "gc_segment_mode")) {
 607                 if (t < MAX_GC_MODE)
 608                         sbi->gc_segment_mode = t;
 609                 else
 610                         return -EINVAL;
 611                 return count;
 612         }
 613
 614         if (!strcmp(a->attr.name, "gc_reclaimed_segments")) {
 615                 if (t != 0)
 616                         return -EINVAL;
 617                 sbi->gc_reclaimed_segs[sbi->gc_segment_mode] = 0;
 618                 return count;
 619         }
 620
 621         if (!strcmp(a->attr.name, "seq_file_ra_mul")) {
 622                 if (t >= MIN_RA_MUL && t <= MAX_RA_MUL)
 623                         sbi->seq_file_ra_mul = t;
 624                 else
 625                         return -EINVAL;
 626                 return count;
 627         }
 628
 629         if (!strcmp(a->attr.name, "max_fragment_chunk")) {
 630                 if (t >= MIN_FRAGMENT_SIZE && t <= MAX_FRAGMENT_SIZE)
 631                         sbi->max_fragment_chunk = t;
 632                 else
 633                         return -EINVAL;
 634                 return count;
 635         }
 636
 637         if (!strcmp(a->attr.name, "max_fragment_hole")) {
 638                 if (t >= MIN_FRAGMENT_SIZE && t <= MAX_FRAGMENT_SIZE)
 639                         sbi->max_fragment_hole = t;
 640                 else
 641                         return -EINVAL;
 642                 return count;
 643         }
 644
 645         if (!strcmp(a->attr.name, "peak_atomic_write")) {
 646                 if (t != 0)
 647                         return -EINVAL;
 648                 sbi->peak_atomic_write = 0;
 649                 return count;
 650         }
 651
 652         if (!strcmp(a->attr.name, "committed_atomic_block")) {
 653                 if (t != 0)
 654                         return -EINVAL;
 655                 sbi->committed_atomic_block = 0;
 656                 return count;
 657         }
 658
 659         if (!strcmp(a->attr.name, "revoked_atomic_block")) {
 660                 if (t != 0)
 661                         return -EINVAL;
 662                 sbi->revoked_atomic_block = 0;
 663                 return count;
 664         }
 665
 666         if (!strcmp(a->attr.name, "readdir_ra")) {
 667                 sbi->readdir_ra = !!t;
 668                 return count;
 669         }
 670
 671         if (!strcmp(a->attr.name, "hot_data_age_threshold")) {
 672                 if (t == 0 || t >= sbi->warm_data_age_threshold)
 673                         return -EINVAL;
 674                 if (t == *ui)
 675                         return count;
 676                 *ui = (unsigned int)t;
 677                 return count;
 678         }
 679
 680         if (!strcmp(a->attr.name, "warm_data_age_threshold")) {
 681                 if (t == 0 || t <= sbi->hot_data_age_threshold)
 682                         return -EINVAL;
 683                 if (t == *ui)
 684                         return count;
 685                 *ui = (unsigned int)t;
 686                 return count;
 687         }
 688
 689         *ui = (unsigned int)t;
 690
 691         return count;
 692 }
 693
 694 static ssize_t f2fs_sbi_store(struct f2fs_attr *a,
 695                         struct f2fs_sb_info *sbi,
 696                         const char *buf, size_t count)
 697 {
 698         ssize_t ret;
 699         bool gc_entry = (!strcmp(a->attr.name, "gc_urgent") ||
 700                                         a->struct_type == GC_THREAD);
 701
 702         if (gc_entry) {
 703                 if (!down_read_trylock(&sbi->sb->s_umount))
 704                         return -EAGAIN;
 705         }
 706         ret = __sbi_store(a, sbi, buf, count);
 707         if (gc_entry)
 708                 up_read(&sbi->sb->s_umount);
 709
 710         return ret;
 711 }
 712
 713 static ssize_t f2fs_attr_show(struct kobject *kobj,
 714                                 struct attribute *attr, char *buf)
 715 {
 716         struct f2fs_sb_info *sbi = container_of(kobj, struct f2fs_sb_info,
 717                                                                 s_kobj);
 718         struct f2fs_attr *a = container_of(attr, struct f2fs_attr, attr);
 719
 720         return a->show ? a->show(a, sbi, buf) : 0;
 721 }
 722
 723 static ssize_t f2fs_attr_store(struct kobject *kobj, struct attribute *attr,
 724                                                 const char *buf, size_t len)
 725 {
 726         struct f2fs_sb_info *sbi = container_of(kobj, struct f2fs_sb_info,
 727                                                                         s_kobj);
 728         struct f2fs_attr *a = container_of(attr, struct f2fs_attr, attr);
 729
 730         return a->store ? a->store(a, sbi, buf, len) : 0;
 731 }
 732
 733 static void f2fs_sb_release(struct kobject *kobj)
 734 {
 735         struct f2fs_sb_info *sbi = container_of(kobj, struct f2fs_sb_info,
 736                                                                 s_kobj);
 737         complete(&sbi->s_kobj_unregister);
 738 }
 739
 740 /*
 741  * Note that there are three feature list entries:
 742  * 1) /sys/fs/f2fs/features
 743  *   : shows runtime features supported by in-kernel f2fs along with Kconfig.
 744  *     - ref. F2FS_FEATURE_RO_ATTR()
 745  *
 746  * 2) /sys/fs/f2fs/$s_id/features <deprecated>
 747  *   : shows on-disk features enabled by mkfs.f2fs, used for old kernels. This
 748  *     won't add new feature anymore, and thus, users should check entries in 3)
 749  *     instead of this 2).
 750  *
 751  * 3) /sys/fs/f2fs/$s_id/feature_list
 752  *   : shows on-disk features enabled by mkfs.f2fs per instance, which follows
 753  *     sysfs entry rule where each entry should expose single value.
 754  *     This list covers old feature list provided by 2) and beyond. Therefore,
 755  *     please add new on-disk feature in this list only.
 756  *     - ref. F2FS_SB_FEATURE_RO_ATTR()
 757  */
 758 static ssize_t f2fs_feature_show(struct f2fs_attr *a,
 759                 struct f2fs_sb_info *sbi, char *buf)
 760 {
 761         return sysfs_emit(buf, "supported\n");
 762 }
 763
 764 #define F2FS_FEATURE_RO_ATTR(_name)                             \
 765 static struct f2fs_attr f2fs_attr_##_name = {                   \
 766         .attr = {.name = __stringify(_name), .mode = 0444 },    \
 767         .show   = f2fs_feature_show,                            \
 768 }
 769
 770 static ssize_t f2fs_sb_feature_show(struct f2fs_attr *a,
 771                 struct f2fs_sb_info *sbi, char *buf)
 772 {
 773         if (F2FS_HAS_FEATURE(sbi, a->id))
 774                 return sysfs_emit(buf, "supported\n");
 775         return sysfs_emit(buf, "unsupported\n");
 776 }
 777
 778 #define F2FS_SB_FEATURE_RO_ATTR(_name, _feat)                   \
 779 static struct f2fs_attr f2fs_attr_sb_##_name = {                \
 780         .attr = {.name = __stringify(_name), .mode = 0444 },    \
 781         .show   = f2fs_sb_feature_show,                         \
 782         .id     = F2FS_FEATURE_##_feat,                         \
 783 }
 784
 785 #define F2FS_ATTR_OFFSET(_struct_type, _name, _mode, _show, _store, _offset) \
 786 static struct f2fs_attr f2fs_attr_##_name = {                   \
 787         .attr = {.name = __stringify(_name), .mode = _mode },   \
 788         .show   = _show,                                        \
 789         .store  = _store,                                       \
 790         .struct_type = _struct_type,                            \
 791         .offset = _offset                                       \
 792 }
 793
 794 #define F2FS_RO_ATTR(struct_type, struct_name, name, elname)    \
 795         F2FS_ATTR_OFFSET(struct_type, name, 0444,               \
 796                 f2fs_sbi_show, NULL,                            \
 797                 offsetof(struct struct_name, elname))
 798
 799 #define F2FS_RW_ATTR(struct_type, struct_name, name, elname)    \
 800         F2FS_ATTR_OFFSET(struct_type, name, 0644,               \
 801                 f2fs_sbi_show, f2fs_sbi_store,                  \
 802                 offsetof(struct struct_name, elname))
 803
 804 #define F2FS_GENERAL_RO_ATTR(name) \
 805 static struct f2fs_attr f2fs_attr_##name = __ATTR(name, 0444, name##_show, NULL)
 806
 807 #define F2FS_STAT_ATTR(_struct_type, _struct_name, _name, _elname)      \
 808 static struct f2fs_attr f2fs_attr_##_name = {                   \
 809         .attr = {.name = __stringify(_name), .mode = 0444 },    \
 810         .show = f2fs_sbi_show,                                  \
 811         .struct_type = _struct_type,                            \
 812         .offset = offsetof(struct _struct_name, _elname),       \
 813 }
 814
 815 F2FS_RW_ATTR(GC_THREAD, f2fs_gc_kthread, gc_urgent_sleep_time,
 816                                                         urgent_sleep_time);
 817 F2FS_RW_ATTR(GC_THREAD, f2fs_gc_kthread, gc_min_sleep_time, min_sleep_time);
 818 F2FS_RW_ATTR(GC_THREAD, f2fs_gc_kthread, gc_max_sleep_time, max_sleep_time);
 819 F2FS_RW_ATTR(GC_THREAD, f2fs_gc_kthread, gc_no_gc_sleep_time, no_gc_sleep_time);
 820 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, gc_idle, gc_mode);
 821 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, gc_urgent, gc_mode);
 822 F2FS_RW_ATTR(SM_INFO, f2fs_sm_info, reclaim_segments, rec_prefree_segments);
 823 F2FS_RW_ATTR(DCC_INFO, discard_cmd_control, max_small_discards, max_discards);
 824 F2FS_RW_ATTR(DCC_INFO, discard_cmd_control, max_discard_request, max_discard_request);
 825 F2FS_RW_ATTR(DCC_INFO, discard_cmd_control, min_discard_issue_time, min_discard_issue_time);
 826 F2FS_RW_ATTR(DCC_INFO, discard_cmd_control, mid_discard_issue_time, mid_discard_issue_time);
 827 F2FS_RW_ATTR(DCC_INFO, discard_cmd_control, max_discard_issue_time, max_discard_issue_time);
 828 F2FS_RW_ATTR(DCC_INFO, discard_cmd_control, discard_urgent_util, discard_urgent_util);
 829 F2FS_RW_ATTR(DCC_INFO, discard_cmd_control, discard_granularity, discard_granularity);
 830 F2FS_RW_ATTR(DCC_INFO, discard_cmd_control, max_ordered_discard, max_ordered_discard);
 831 F2FS_RW_ATTR(RESERVED_BLOCKS, f2fs_sb_info, reserved_blocks, reserved_blocks);
 832 F2FS_RW_ATTR(SM_INFO, f2fs_sm_info, ipu_policy, ipu_policy);
 833 F2FS_RW_ATTR(SM_INFO, f2fs_sm_info, min_ipu_util, min_ipu_util);
 834 F2FS_RW_ATTR(SM_INFO, f2fs_sm_info, min_fsync_blocks, min_fsync_blocks);
 835 F2FS_RW_ATTR(SM_INFO, f2fs_sm_info, min_seq_blocks, min_seq_blocks);
 836 F2FS_RW_ATTR(SM_INFO, f2fs_sm_info, min_hot_blocks, min_hot_blocks);
 837 F2FS_RW_ATTR(SM_INFO, f2fs_sm_info, min_ssr_sections, min_ssr_sections);
 838 F2FS_RW_ATTR(NM_INFO, f2fs_nm_info, ram_thresh, ram_thresh);
 839 F2FS_RW_ATTR(NM_INFO, f2fs_nm_info, ra_nid_pages, ra_nid_pages);
 840 F2FS_RW_ATTR(NM_INFO, f2fs_nm_info, dirty_nats_ratio, dirty_nats_ratio);
 841 F2FS_RW_ATTR(NM_INFO, f2fs_nm_info, max_roll_forward_node_blocks, max_rf_node_blocks);
 842 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, max_victim_search, max_victim_search);
 843 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, migration_granularity, migration_granularity);
 844 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, dir_level, dir_level);
 845 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, cp_interval, interval_time[CP_TIME]);
 846 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, idle_interval, interval_time[REQ_TIME]);
 847 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, discard_idle_interval,
 848                                         interval_time[DISCARD_TIME]);
 849 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, gc_idle_interval, interval_time[GC_TIME]);
 850 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info,
 851                 umount_discard_timeout, interval_time[UMOUNT_DISCARD_TIMEOUT]);
 852 #ifdef CONFIG_F2FS_IOSTAT
 853 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, iostat_enable, iostat_enable);
 854 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, iostat_period_ms, iostat_period_ms);
 855 #endif
 856 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, readdir_ra, readdir_ra);
 857 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, max_io_bytes, max_io_bytes);
 858 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, gc_pin_file_thresh, gc_pin_file_threshold);
 859 F2FS_RW_ATTR(F2FS_SBI, f2fs_super_block, extension_list, extension_list);
 860 #ifdef CONFIG_F2FS_FAULT_INJECTION
 861 F2FS_RW_ATTR(FAULT_INFO_RATE, f2fs_fault_info, inject_rate, inject_rate);
 862 F2FS_RW_ATTR(FAULT_INFO_TYPE, f2fs_fault_info, inject_type, inject_type);
 863 #endif
 864 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, data_io_flag, data_io_flag);
 865 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, node_io_flag, node_io_flag);
 866 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, gc_remaining_trials, gc_remaining_trials);
 867 F2FS_RW_ATTR(CPRC_INFO, ckpt_req_control, ckpt_thread_ioprio, ckpt_thread_ioprio);
 868 F2FS_GENERAL_RO_ATTR(dirty_segments);
 869 F2FS_GENERAL_RO_ATTR(free_segments);
 870 F2FS_GENERAL_RO_ATTR(ovp_segments);
 871 F2FS_GENERAL_RO_ATTR(lifetime_write_kbytes);
 872 F2FS_GENERAL_RO_ATTR(features);
 873 F2FS_GENERAL_RO_ATTR(current_reserved_blocks);
 874 F2FS_GENERAL_RO_ATTR(unusable);
 875 F2FS_GENERAL_RO_ATTR(encoding);
 876 F2FS_GENERAL_RO_ATTR(mounted_time_sec);
 877 F2FS_GENERAL_RO_ATTR(main_blkaddr);
 878 F2FS_GENERAL_RO_ATTR(pending_discard);
 879 F2FS_GENERAL_RO_ATTR(gc_mode);
 880 #ifdef CONFIG_F2FS_STAT_FS
 881 F2FS_STAT_ATTR(STAT_INFO, f2fs_stat_info, cp_foreground_calls, cp_count);
 882 F2FS_STAT_ATTR(STAT_INFO, f2fs_stat_info, cp_background_calls, bg_cp_count);
 883 F2FS_STAT_ATTR(STAT_INFO, f2fs_stat_info, gc_foreground_calls, call_count);
 884 F2FS_STAT_ATTR(STAT_INFO, f2fs_stat_info, gc_background_calls, bg_gc);
 885 F2FS_GENERAL_RO_ATTR(moved_blocks_background);
 886 F2FS_GENERAL_RO_ATTR(moved_blocks_foreground);
 887 F2FS_GENERAL_RO_ATTR(avg_vblocks);
 888 #endif
 889
 890 #ifdef CONFIG_FS_ENCRYPTION
 891 F2FS_FEATURE_RO_ATTR(encryption);
 892 F2FS_FEATURE_RO_ATTR(test_dummy_encryption_v2);
 893 #if IS_ENABLED(CONFIG_UNICODE)
 894 F2FS_FEATURE_RO_ATTR(encrypted_casefold);
 895 #endif
 896 #endif /* CONFIG_FS_ENCRYPTION */
 897 #ifdef CONFIG_BLK_DEV_ZONED
 898 F2FS_FEATURE_RO_ATTR(block_zoned);
 899 F2FS_RO_ATTR(F2FS_SBI, f2fs_sb_info, unusable_blocks_per_sec,
 900                                         unusable_blocks_per_sec);
 901 #endif
 902 F2FS_FEATURE_RO_ATTR(atomic_write);
 903 F2FS_FEATURE_RO_ATTR(extra_attr);
 904 F2FS_FEATURE_RO_ATTR(project_quota);
 905 F2FS_FEATURE_RO_ATTR(inode_checksum);
 906 F2FS_FEATURE_RO_ATTR(flexible_inline_xattr);
 907 F2FS_FEATURE_RO_ATTR(quota_ino);
 908 F2FS_FEATURE_RO_ATTR(inode_crtime);
 909 F2FS_FEATURE_RO_ATTR(lost_found);
 910 #ifdef CONFIG_FS_VERITY
 911 F2FS_FEATURE_RO_ATTR(verity);
 912 #endif
 913 F2FS_FEATURE_RO_ATTR(sb_checksum);
 914 #if IS_ENABLED(CONFIG_UNICODE)
 915 F2FS_FEATURE_RO_ATTR(casefold);
 916 #endif
 917 F2FS_FEATURE_RO_ATTR(readonly);
 918 #ifdef CONFIG_F2FS_FS_COMPRESSION
 919 F2FS_FEATURE_RO_ATTR(compression);
 920 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, compr_written_block, compr_written_block);
 921 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, compr_saved_block, compr_saved_block);
 922 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, compr_new_inode, compr_new_inode);
 923 #endif
 924 F2FS_FEATURE_RO_ATTR(pin_file);
 925
 926 /* For ATGC */
 927 F2FS_RW_ATTR(ATGC_INFO, atgc_management, atgc_candidate_ratio, candidate_ratio);
 928 F2FS_RW_ATTR(ATGC_INFO, atgc_management, atgc_candidate_count, max_candidate_count);
 929 F2FS_RW_ATTR(ATGC_INFO, atgc_management, atgc_age_weight, age_weight);
 930 F2FS_RW_ATTR(ATGC_INFO, atgc_management, atgc_age_threshold, age_threshold);
 931
 932 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, seq_file_ra_mul, seq_file_ra_mul);
 933 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, gc_segment_mode, gc_segment_mode);
 934 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, gc_reclaimed_segments, gc_reclaimed_segs);
 935 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, max_fragment_chunk, max_fragment_chunk);
 936 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, max_fragment_hole, max_fragment_hole);
 937
 938 /* For atomic write */
 939 F2FS_RO_ATTR(F2FS_SBI, f2fs_sb_info, current_atomic_write, current_atomic_write);
 940 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, peak_atomic_write, peak_atomic_write);
 941 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, committed_atomic_block, committed_atomic_block);
 942 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, revoked_atomic_block, revoked_atomic_block);
 943
 944 /* For block age extent cache */
 945 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, hot_data_age_threshold, hot_data_age_threshold);
 946 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, warm_data_age_threshold, warm_data_age_threshold);
 947
 948 #define ATTR_LIST(name) (&f2fs_attr_##name.attr)
 949 static struct attribute *f2fs_attrs[] = {
 950         ATTR_LIST(gc_urgent_sleep_time),
 951         ATTR_LIST(gc_min_sleep_time),
 952         ATTR_LIST(gc_max_sleep_time),
 953         ATTR_LIST(gc_no_gc_sleep_time),
 954         ATTR_LIST(gc_idle),
 955         ATTR_LIST(gc_urgent),
 956         ATTR_LIST(reclaim_segments),
 957         ATTR_LIST(main_blkaddr),
 958         ATTR_LIST(max_small_discards),
 959         ATTR_LIST(max_discard_request),
 960         ATTR_LIST(min_discard_issue_time),
 961         ATTR_LIST(mid_discard_issue_time),
 962         ATTR_LIST(max_discard_issue_time),
 963         ATTR_LIST(discard_urgent_util),
 964         ATTR_LIST(discard_granularity),
 965         ATTR_LIST(max_ordered_discard),
 966         ATTR_LIST(pending_discard),
 967         ATTR_LIST(gc_mode),
 968         ATTR_LIST(ipu_policy),
 969         ATTR_LIST(min_ipu_util),
 970         ATTR_LIST(min_fsync_blocks),
 971         ATTR_LIST(min_seq_blocks),
 972         ATTR_LIST(min_hot_blocks),
 973         ATTR_LIST(min_ssr_sections),
 974         ATTR_LIST(max_victim_search),
 975         ATTR_LIST(migration_granularity),
 976         ATTR_LIST(dir_level),
 977         ATTR_LIST(ram_thresh),
 978         ATTR_LIST(ra_nid_pages),
 979         ATTR_LIST(dirty_nats_ratio),
 980         ATTR_LIST(max_roll_forward_node_blocks),
 981         ATTR_LIST(cp_interval),
 982         ATTR_LIST(idle_interval),
 983         ATTR_LIST(discard_idle_interval),
 984         ATTR_LIST(gc_idle_interval),
 985         ATTR_LIST(umount_discard_timeout),
 986 #ifdef CONFIG_F2FS_IOSTAT
 987         ATTR_LIST(iostat_enable),
 988         ATTR_LIST(iostat_period_ms),
 989 #endif
 990         ATTR_LIST(readdir_ra),
 991         ATTR_LIST(max_io_bytes),
 992         ATTR_LIST(gc_pin_file_thresh),
 993         ATTR_LIST(extension_list),
 994 #ifdef CONFIG_F2FS_FAULT_INJECTION
 995         ATTR_LIST(inject_rate),
 996         ATTR_LIST(inject_type),
 997 #endif
 998         ATTR_LIST(data_io_flag),
 999         ATTR_LIST(node_io_flag),
1000         ATTR_LIST(gc_remaining_trials),
1001         ATTR_LIST(ckpt_thread_ioprio),
1002         ATTR_LIST(dirty_segments),
1003         ATTR_LIST(free_segments),
1004         ATTR_LIST(ovp_segments),
1005         ATTR_LIST(unusable),
1006         ATTR_LIST(lifetime_write_kbytes),
1007         ATTR_LIST(features),
1008         ATTR_LIST(reserved_blocks),
1009         ATTR_LIST(current_reserved_blocks),
1010         ATTR_LIST(encoding),
1011         ATTR_LIST(mounted_time_sec),
1012 #ifdef CONFIG_F2FS_STAT_FS
1013         ATTR_LIST(cp_foreground_calls),
1014         ATTR_LIST(cp_background_calls),
1015         ATTR_LIST(gc_foreground_calls),
1016         ATTR_LIST(gc_background_calls),
1017         ATTR_LIST(moved_blocks_foreground),
1018         ATTR_LIST(moved_blocks_background),
1019         ATTR_LIST(avg_vblocks),
1020 #endif
1021 #ifdef CONFIG_BLK_DEV_ZONED
1022         ATTR_LIST(unusable_blocks_per_sec),
1023 #endif
1024 #ifdef CONFIG_F2FS_FS_COMPRESSION
1025         ATTR_LIST(compr_written_block),
1026         ATTR_LIST(compr_saved_block),
1027         ATTR_LIST(compr_new_inode),
1028 #endif
1029         /* For ATGC */
1030         ATTR_LIST(atgc_candidate_ratio),
1031         ATTR_LIST(atgc_candidate_count),
1032         ATTR_LIST(atgc_age_weight),
1033         ATTR_LIST(atgc_age_threshold),
1034         ATTR_LIST(seq_file_ra_mul),
1035         ATTR_LIST(gc_segment_mode),
1036         ATTR_LIST(gc_reclaimed_segments),
1037         ATTR_LIST(max_fragment_chunk),
1038         ATTR_LIST(max_fragment_hole),
1039         ATTR_LIST(current_atomic_write),
1040         ATTR_LIST(peak_atomic_write),
1041         ATTR_LIST(committed_atomic_block),
1042         ATTR_LIST(revoked_atomic_block),
1043         ATTR_LIST(hot_data_age_threshold),
1044         ATTR_LIST(warm_data_age_threshold),
1045         NULL,
1046 };
1047 ATTRIBUTE_GROUPS(f2fs);
1048
1049 static struct attribute *f2fs_feat_attrs[] = {
1050 #ifdef CONFIG_FS_ENCRYPTION
1051         ATTR_LIST(encryption),
1052         ATTR_LIST(test_dummy_encryption_v2),
1053 #if IS_ENABLED(CONFIG_UNICODE)
1054         ATTR_LIST(encrypted_casefold),
1055 #endif
1056 #endif /* CONFIG_FS_ENCRYPTION */
1057 #ifdef CONFIG_BLK_DEV_ZONED
1058         ATTR_LIST(block_zoned),
1059 #endif
1060         ATTR_LIST(atomic_write),
1061         ATTR_LIST(extra_attr),
1062         ATTR_LIST(project_quota),
1063         ATTR_LIST(inode_checksum),
1064         ATTR_LIST(flexible_inline_xattr),
1065         ATTR_LIST(quota_ino),
1066         ATTR_LIST(inode_crtime),
1067         ATTR_LIST(lost_found),
1068 #ifdef CONFIG_FS_VERITY
1069         ATTR_LIST(verity),
1070 #endif
1071         ATTR_LIST(sb_checksum),
1072 #if IS_ENABLED(CONFIG_UNICODE)
1073         ATTR_LIST(casefold),
1074 #endif
1075         ATTR_LIST(readonly),
1076 #ifdef CONFIG_F2FS_FS_COMPRESSION
1077         ATTR_LIST(compression),
1078 #endif
1079         ATTR_LIST(pin_file),
1080         NULL,
1081 };
1082 ATTRIBUTE_GROUPS(f2fs_feat);
1083
1084 F2FS_GENERAL_RO_ATTR(sb_status);
1085 F2FS_GENERAL_RO_ATTR(cp_status);
1086 static struct attribute *f2fs_stat_attrs[] = {
1087         ATTR_LIST(sb_status),
1088         ATTR_LIST(cp_status),
1089         NULL,
1090 };
1091 ATTRIBUTE_GROUPS(f2fs_stat);
1092
1093 F2FS_SB_FEATURE_RO_ATTR(encryption, ENCRYPT);
1094 F2FS_SB_FEATURE_RO_ATTR(block_zoned, BLKZONED);
1095 F2FS_SB_FEATURE_RO_ATTR(extra_attr, EXTRA_ATTR);
1096 F2FS_SB_FEATURE_RO_ATTR(project_quota, PRJQUOTA);
1097 F2FS_SB_FEATURE_RO_ATTR(inode_checksum, INODE_CHKSUM);
1098 F2FS_SB_FEATURE_RO_ATTR(flexible_inline_xattr, FLEXIBLE_INLINE_XATTR);
1099 F2FS_SB_FEATURE_RO_ATTR(quota_ino, QUOTA_INO);
1100 F2FS_SB_FEATURE_RO_ATTR(inode_crtime, INODE_CRTIME);
1101 F2FS_SB_FEATURE_RO_ATTR(lost_found, LOST_FOUND);
1102 F2FS_SB_FEATURE_RO_ATTR(verity, VERITY);
1103 F2FS_SB_FEATURE_RO_ATTR(sb_checksum, SB_CHKSUM);
1104 F2FS_SB_FEATURE_RO_ATTR(casefold, CASEFOLD);
1105 F2FS_SB_FEATURE_RO_ATTR(compression, COMPRESSION);
1106 F2FS_SB_FEATURE_RO_ATTR(readonly, RO);
1107
1108 static struct attribute *f2fs_sb_feat_attrs[] = {
1109         ATTR_LIST(sb_encryption),
1110         ATTR_LIST(sb_block_zoned),
1111         ATTR_LIST(sb_extra_attr),
1112         ATTR_LIST(sb_project_quota),
1113         ATTR_LIST(sb_inode_checksum),
1114         ATTR_LIST(sb_flexible_inline_xattr),
1115         ATTR_LIST(sb_quota_ino),
1116         ATTR_LIST(sb_inode_crtime),
1117         ATTR_LIST(sb_lost_found),
1118         ATTR_LIST(sb_verity),
1119         ATTR_LIST(sb_sb_checksum),
1120         ATTR_LIST(sb_casefold),
1121         ATTR_LIST(sb_compression),
1122         ATTR_LIST(sb_readonly),
1123         NULL,
1124 };
1125 ATTRIBUTE_GROUPS(f2fs_sb_feat);
1126
1127 static const struct sysfs_ops f2fs_attr_ops = {
1128         .show   = f2fs_attr_show,
1129         .store  = f2fs_attr_store,
1130 };
1131
1132 static struct kobj_type f2fs_sb_ktype = {
1133         .default_groups = f2fs_groups,
1134         .sysfs_ops      = &f2fs_attr_ops,
1135         .release        = f2fs_sb_release,
1136 };
1137
1138 static struct kobj_type f2fs_ktype = {
1139         .sysfs_ops      = &f2fs_attr_ops,
1140 };
1141
1142 static struct kset f2fs_kset = {
1143         .kobj   = {.ktype = &f2fs_ktype},
1144 };
1145
1146 static struct kobj_type f2fs_feat_ktype = {
1147         .default_groups = f2fs_feat_groups,
1148         .sysfs_ops      = &f2fs_attr_ops,
1149 };
1150
1151 static struct kobject f2fs_feat = {
1152         .kset   = &f2fs_kset,
1153 };
1154
1155 static ssize_t f2fs_stat_attr_show(struct kobject *kobj,
1156                                 struct attribute *attr, char *buf)
1157 {
1158         struct f2fs_sb_info *sbi = container_of(kobj, struct f2fs_sb_info,
1159                                                                 s_stat_kobj);
1160         struct f2fs_attr *a = container_of(attr, struct f2fs_attr, attr);
1161
1162         return a->show ? a->show(a, sbi, buf) : 0;
1163 }
1164
1165 static ssize_t f2fs_stat_attr_store(struct kobject *kobj, struct attribute *attr,
1166                                                 const char *buf, size_t len)
1167 {
1168         struct f2fs_sb_info *sbi = container_of(kobj, struct f2fs_sb_info,
1169                                                                 s_stat_kobj);
1170         struct f2fs_attr *a = container_of(attr, struct f2fs_attr, attr);
1171
1172         return a->store ? a->store(a, sbi, buf, len) : 0;
1173 }
1174
1175 static void f2fs_stat_kobj_release(struct kobject *kobj)
1176 {
1177         struct f2fs_sb_info *sbi = container_of(kobj, struct f2fs_sb_info,
1178                                                                 s_stat_kobj);
1179         complete(&sbi->s_stat_kobj_unregister);
1180 }
1181
1182 static const struct sysfs_ops f2fs_stat_attr_ops = {
1183         .show   = f2fs_stat_attr_show,
1184         .store  = f2fs_stat_attr_store,
1185 };
1186
1187 static struct kobj_type f2fs_stat_ktype = {
1188         .default_groups = f2fs_stat_groups,
1189         .sysfs_ops      = &f2fs_stat_attr_ops,
1190         .release        = f2fs_stat_kobj_release,
1191 };
1192
1193 static ssize_t f2fs_sb_feat_attr_show(struct kobject *kobj,
1194                                 struct attribute *attr, char *buf)
1195 {
1196         struct f2fs_sb_info *sbi = container_of(kobj, struct f2fs_sb_info,
1197                                                         s_feature_list_kobj);
1198         struct f2fs_attr *a = container_of(attr, struct f2fs_attr, attr);
1199
1200         return a->show ? a->show(a, sbi, buf) : 0;
1201 }
1202
1203 static void f2fs_feature_list_kobj_release(struct kobject *kobj)
1204 {
1205         struct f2fs_sb_info *sbi = container_of(kobj, struct f2fs_sb_info,
1206                                                         s_feature_list_kobj);
1207         complete(&sbi->s_feature_list_kobj_unregister);
1208 }
1209
1210 static const struct sysfs_ops f2fs_feature_list_attr_ops = {
1211         .show   = f2fs_sb_feat_attr_show,
1212 };
1213
1214 static struct kobj_type f2fs_feature_list_ktype = {
1215         .default_groups = f2fs_sb_feat_groups,
1216         .sysfs_ops      = &f2fs_feature_list_attr_ops,
1217         .release        = f2fs_feature_list_kobj_release,
1218 };
1219
1220 static int __maybe_unused segment_info_seq_show(struct seq_file *seq,
1221                                                 void *offset)
1222 {
1223         struct super_block *sb = seq->private;
1224         struct f2fs_sb_info *sbi = F2FS_SB(sb);
1225         unsigned int total_segs =
1226                         le32_to_cpu(sbi->raw_super->segment_count_main);
1227         int i;
1228
1229         seq_puts(seq, "format: segment_type|valid_blocks\n"
1230                 "segment_type(0:HD, 1:WD, 2:CD, 3:HN, 4:WN, 5:CN)\n");
1231
1232         for (i = 0; i < total_segs; i++) {
1233                 struct seg_entry *se = get_seg_entry(sbi, i);
1234
1235                 if ((i % 10) == 0)
1236                         seq_printf(seq, "%-10d", i);
1237                 seq_printf(seq, "%d|%-3u", se->type, se->valid_blocks);
1238                 if ((i % 10) == 9 || i == (total_segs - 1))
1239                         seq_putc(seq, '\n');
1240                 else
1241                         seq_putc(seq, ' ');
1242         }
1243
1244         return 0;
1245 }
1246
1247 static int __maybe_unused segment_bits_seq_show(struct seq_file *seq,
1248                                                 void *offset)
1249 {
1250         struct super_block *sb = seq->private;
1251         struct f2fs_sb_info *sbi = F2FS_SB(sb);
1252         unsigned int total_segs =
1253                         le32_to_cpu(sbi->raw_super->segment_count_main);
1254         int i, j;
1255
1256         seq_puts(seq, "format: segment_type|valid_blocks|bitmaps\n"
1257                 "segment_type(0:HD, 1:WD, 2:CD, 3:HN, 4:WN, 5:CN)\n");
1258
1259         for (i = 0; i < total_segs; i++) {
1260                 struct seg_entry *se = get_seg_entry(sbi, i);
1261
1262                 seq_printf(seq, "%-10d", i);
1263                 seq_printf(seq, "%d|%-3u|", se->type, se->valid_blocks);
1264                 for (j = 0; j < SIT_VBLOCK_MAP_SIZE; j++)
1265                         seq_printf(seq, " %.2x", se->cur_valid_map[j]);
1266                 seq_putc(seq, '\n');
1267         }
1268         return 0;
1269 }
1270
1271 static int __maybe_unused victim_bits_seq_show(struct seq_file *seq,
1272                                                 void *offset)
1273 {
1274         struct super_block *sb = seq->private;
1275         struct f2fs_sb_info *sbi = F2FS_SB(sb);
1276         struct dirty_seglist_info *dirty_i = DIRTY_I(sbi);
1277         int i;
1278
1279         seq_puts(seq, "format: victim_secmap bitmaps\n");
1280
1281         for (i = 0; i < MAIN_SECS(sbi); i++) {
1282                 if ((i % 10) == 0)
1283                         seq_printf(seq, "%-10d", i);
1284                 seq_printf(seq, "%d", test_bit(i, dirty_i->victim_secmap) ? 1 : 0);
1285                 if ((i % 10) == 9 || i == (MAIN_SECS(sbi) - 1))
1286                         seq_putc(seq, '\n');
1287                 else
1288                         seq_putc(seq, ' ');
1289         }
1290         return 0;
1291 }
1292
1293 static int __maybe_unused discard_plist_seq_show(struct seq_file *seq,
1294                                                 void *offset)
1295 {
1296         struct super_block *sb = seq->private;
1297         struct f2fs_sb_info *sbi = F2FS_SB(sb);
1298         struct discard_cmd_control *dcc = SM_I(sbi)->dcc_info;
1299         int i, count;
1300
1301         seq_puts(seq, "Discard pend list(Show diacrd_cmd count on each entry, .:not exist):\n");
1302         if (!f2fs_realtime_discard_enable(sbi))
1303                 return 0;
1304
1305         if (dcc) {
1306                 mutex_lock(&dcc->cmd_lock);
1307                 for (i = 0; i < MAX_PLIST_NUM; i++) {
1308                         struct list_head *pend_list;
1309                         struct discard_cmd *dc, *tmp;
1310
1311                         if (i % 8 == 0)
1312                                 seq_printf(seq, "  %-3d", i);
1313                         count = 0;
1314                         pend_list = &dcc->pend_list[i];
1315                         list_for_each_entry_safe(dc, tmp, pend_list, list)
1316                                 count++;
1317                         if (count)
1318                                 seq_printf(seq, " %7d", count);
1319                         else
1320                                 seq_puts(seq, "       .");
1321                         if (i % 8 == 7)
1322                                 seq_putc(seq, '\n');
1323                 }
1324                 seq_putc(seq, '\n');
1325                 mutex_unlock(&dcc->cmd_lock);
1326         }
1327
1328         return 0;
1329 }
1330
1331 int __init f2fs_init_sysfs(void)
1332 {
1333         int ret;
1334
1335         kobject_set_name(&f2fs_kset.kobj, "f2fs");
1336         f2fs_kset.kobj.parent = fs_kobj;
1337         ret = kset_register(&f2fs_kset);
1338         if (ret)
1339                 return ret;
1340
1341         ret = kobject_init_and_add(&f2fs_feat, &f2fs_feat_ktype,
1342                                    NULL, "features");
1343         if (ret) {
1344                 kobject_put(&f2fs_feat);
1345                 kset_unregister(&f2fs_kset);
1346         } else {
1347                 f2fs_proc_root = proc_mkdir("fs/f2fs", NULL);
1348         }
1349         return ret;
1350 }
1351
1352 void f2fs_exit_sysfs(void)
1353 {
1354         kobject_put(&f2fs_feat);
1355         kset_unregister(&f2fs_kset);
1356         remove_proc_entry("fs/f2fs", NULL);
1357         f2fs_proc_root = NULL;
1358 }
1359
1360 int f2fs_register_sysfs(struct f2fs_sb_info *sbi)
1361 {
1362         struct super_block *sb = sbi->sb;
1363         int err;
1364
1365         sbi->s_kobj.kset = &f2fs_kset;
1366         init_completion(&sbi->s_kobj_unregister);
1367         err = kobject_init_and_add(&sbi->s_kobj, &f2fs_sb_ktype, NULL,
1368                                 "%s", sb->s_id);
1369         if (err)
1370                 goto put_sb_kobj;
1371
1372         sbi->s_stat_kobj.kset = &f2fs_kset;
1373         init_completion(&sbi->s_stat_kobj_unregister);
1374         err = kobject_init_and_add(&sbi->s_stat_kobj, &f2fs_stat_ktype,
1375                                                 &sbi->s_kobj, "stat");
1376         if (err)
1377                 goto put_stat_kobj;
1378
1379         sbi->s_feature_list_kobj.kset = &f2fs_kset;
1380         init_completion(&sbi->s_feature_list_kobj_unregister);
1381         err = kobject_init_and_add(&sbi->s_feature_list_kobj,
1382                                         &f2fs_feature_list_ktype,
1383                                         &sbi->s_kobj, "feature_list");
1384         if (err)
1385                 goto put_feature_list_kobj;
1386
1387         if (f2fs_proc_root)
1388                 sbi->s_proc = proc_mkdir(sb->s_id, f2fs_proc_root);
1389
1390         if (sbi->s_proc) {
1391                 proc_create_single_data("segment_info", 0444, sbi->s_proc,
1392                                 segment_info_seq_show, sb);
1393                 proc_create_single_data("segment_bits", 0444, sbi->s_proc,
1394                                 segment_bits_seq_show, sb);
1395 #ifdef CONFIG_F2FS_IOSTAT
1396                 proc_create_single_data("iostat_info", 0444, sbi->s_proc,
1397                                 iostat_info_seq_show, sb);
1398 #endif
1399                 proc_create_single_data("victim_bits", 0444, sbi->s_proc,
1400                                 victim_bits_seq_show, sb);
1401                 proc_create_single_data("discard_plist_info", 0444, sbi->s_proc,
1402                                 discard_plist_seq_show, sb);
1403         }
1404         return 0;
1405 put_feature_list_kobj:
1406         kobject_put(&sbi->s_feature_list_kobj);
1407         wait_for_completion(&sbi->s_feature_list_kobj_unregister);
1408 put_stat_kobj:
1409         kobject_put(&sbi->s_stat_kobj);
1410         wait_for_completion(&sbi->s_stat_kobj_unregister);
1411 put_sb_kobj:
1412         kobject_put(&sbi->s_kobj);
1413         wait_for_completion(&sbi->s_kobj_unregister);
1414         return err;
1415 }
1416
1417 void f2fs_unregister_sysfs(struct f2fs_sb_info *sbi)
1418 {
1419         if (sbi->s_proc) {
1420 #ifdef CONFIG_F2FS_IOSTAT
1421                 remove_proc_entry("iostat_info", sbi->s_proc);
1422 #endif
1423                 remove_proc_entry("segment_info", sbi->s_proc);
1424                 remove_proc_entry("segment_bits", sbi->s_proc);
1425                 remove_proc_entry("victim_bits", sbi->s_proc);
1426                 remove_proc_entry("discard_plist_info", sbi->s_proc);
1427                 remove_proc_entry(sbi->sb->s_id, f2fs_proc_root);
1428         }
1429
1430         kobject_del(&sbi->s_stat_kobj);
1431         kobject_put(&sbi->s_stat_kobj);
1432         wait_for_completion(&sbi->s_stat_kobj_unregister);
1433         kobject_del(&sbi->s_feature_list_kobj);
1434         kobject_put(&sbi->s_feature_list_kobj);
1435         wait_for_completion(&sbi->s_feature_list_kobj_unregister);
1436
1437         kobject_del(&sbi->s_kobj);
1438         kobject_put(&sbi->s_kobj);
1439         wait_for_completion(&sbi->s_kobj_unregister);
1440 }