fs/f2fs/sysfs.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 /*
   3  * f2fs sysfs interface
   4  *
   5  * Copyright (c) 2012 Samsung Electronics Co., Ltd.
   6  *             http://www.samsung.com/
   7  * Copyright (c) 2017 Chao Yu <chao@kernel.org>
   8  */
   9 #include <linux/compiler.h>
  10 #include <linux/proc_fs.h>
  11 #include <linux/f2fs_fs.h>
  12 #include <linux/seq_file.h>
  13 #include <linux/unicode.h>
  14 #include <linux/ioprio.h>
  15 #include <linux/sysfs.h>
  16
  17 #include "f2fs.h"
  18 #include "segment.h"
  19 #include "gc.h"
  20 #include "iostat.h"
  21 #include <trace/events/f2fs.h>
  22
  23 static struct proc_dir_entry *f2fs_proc_root;
  24
  25 /* Sysfs support for f2fs */
  26 enum {
  27         GC_THREAD,      /* struct f2fs_gc_thread */
  28         SM_INFO,        /* struct f2fs_sm_info */
  29         DCC_INFO,       /* struct discard_cmd_control */
  30         NM_INFO,        /* struct f2fs_nm_info */
  31         F2FS_SBI,       /* struct f2fs_sb_info */
  32 #ifdef CONFIG_F2FS_STAT_FS
  33         STAT_INFO,      /* struct f2fs_stat_info */
  34 #endif
  35 #ifdef CONFIG_F2FS_FAULT_INJECTION
  36         FAULT_INFO_RATE,        /* struct f2fs_fault_info */
  37         FAULT_INFO_TYPE,        /* struct f2fs_fault_info */
  38 #endif
  39         RESERVED_BLOCKS,        /* struct f2fs_sb_info */
  40         CPRC_INFO,      /* struct ckpt_req_control */
  41         ATGC_INFO,      /* struct atgc_management */
  42 };
  43
  44 static const char *gc_mode_names[MAX_GC_MODE] = {
  45         "GC_NORMAL",
  46         "GC_IDLE_CB",
  47         "GC_IDLE_GREEDY",
  48         "GC_IDLE_AT",
  49         "GC_URGENT_HIGH",
  50         "GC_URGENT_LOW",
  51         "GC_URGENT_MID"
  52 };
  53
  54 struct f2fs_attr {
  55         struct attribute attr;
  56         ssize_t (*show)(struct f2fs_attr *, struct f2fs_sb_info *, char *);
  57         ssize_t (*store)(struct f2fs_attr *, struct f2fs_sb_info *,
  58                          const char *, size_t);
  59         int struct_type;
  60         int offset;
  61         int id;
  62 };
  63
  64 static ssize_t f2fs_sbi_show(struct f2fs_attr *a,
  65                              struct f2fs_sb_info *sbi, char *buf);
  66
  67 static unsigned char *__struct_ptr(struct f2fs_sb_info *sbi, int struct_type)
  68 {
  69         if (struct_type == GC_THREAD)
  70                 return (unsigned char *)sbi->gc_thread;
  71         else if (struct_type == SM_INFO)
  72                 return (unsigned char *)SM_I(sbi);
  73         else if (struct_type == DCC_INFO)
  74                 return (unsigned char *)SM_I(sbi)->dcc_info;
  75         else if (struct_type == NM_INFO)
  76                 return (unsigned char *)NM_I(sbi);
  77         else if (struct_type == F2FS_SBI || struct_type == RESERVED_BLOCKS)
  78                 return (unsigned char *)sbi;
  79 #ifdef CONFIG_F2FS_FAULT_INJECTION
  80         else if (struct_type == FAULT_INFO_RATE ||
  81                                         struct_type == FAULT_INFO_TYPE)
  82                 return (unsigned char *)&F2FS_OPTION(sbi).fault_info;
  83 #endif
  84 #ifdef CONFIG_F2FS_STAT_FS
  85         else if (struct_type == STAT_INFO)
  86                 return (unsigned char *)F2FS_STAT(sbi);
  87 #endif
  88         else if (struct_type == CPRC_INFO)
  89                 return (unsigned char *)&sbi->cprc_info;
  90         else if (struct_type == ATGC_INFO)
  91                 return (unsigned char *)&sbi->am;
  92         return NULL;
  93 }
  94
  95 static ssize_t dirty_segments_show(struct f2fs_attr *a,
  96                 struct f2fs_sb_info *sbi, char *buf)
  97 {
  98         return sprintf(buf, "%llu\n",
  99                         (unsigned long long)(dirty_segments(sbi)));
 100 }
 101
 102 static ssize_t free_segments_show(struct f2fs_attr *a,
 103                 struct f2fs_sb_info *sbi, char *buf)
 104 {
 105         return sprintf(buf, "%llu\n",
 106                         (unsigned long long)(free_segments(sbi)));
 107 }
 108
 109 static ssize_t ovp_segments_show(struct f2fs_attr *a,
 110                 struct f2fs_sb_info *sbi, char *buf)
 111 {
 112         return sprintf(buf, "%llu\n",
 113                         (unsigned long long)(overprovision_segments(sbi)));
 114 }
 115
 116 static ssize_t lifetime_write_kbytes_show(struct f2fs_attr *a,
 117                 struct f2fs_sb_info *sbi, char *buf)
 118 {
 119         return sprintf(buf, "%llu\n",
 120                         (unsigned long long)(sbi->kbytes_written +
 121                         ((f2fs_get_sectors_written(sbi) -
 122                                 sbi->sectors_written_start) >> 1)));
 123 }
 124
 125 static ssize_t sb_status_show(struct f2fs_attr *a,
 126                 struct f2fs_sb_info *sbi, char *buf)
 127 {
 128         return sprintf(buf, "%lx\n", sbi->s_flag);
 129 }
 130
 131 static ssize_t cp_status_show(struct f2fs_attr *a,
 132                 struct f2fs_sb_info *sbi, char *buf)
 133 {
 134         return sprintf(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 sprintf(buf, "%llu\n", (unsigned long long)atomic_read(
 143                                 &SM_I(sbi)->dcc_info->discard_cmd_cnt));
 144 }
 145
 146 static ssize_t features_show(struct f2fs_attr *a,
 147                 struct f2fs_sb_info *sbi, char *buf)
 148 {
 149         int len = 0;
 150
 151         if (f2fs_sb_has_encrypt(sbi))
 152                 len += scnprintf(buf, PAGE_SIZE - len, "%s",
 153                                                 "encryption");
 154         if (f2fs_sb_has_blkzoned(sbi))
 155                 len += scnprintf(buf + len, PAGE_SIZE - len, "%s%s",
 156                                 len ? ", " : "", "blkzoned");
 157         if (f2fs_sb_has_extra_attr(sbi))
 158                 len += scnprintf(buf + len, PAGE_SIZE - len, "%s%s",
 159                                 len ? ", " : "", "extra_attr");
 160         if (f2fs_sb_has_project_quota(sbi))
 161                 len += scnprintf(buf + len, PAGE_SIZE - len, "%s%s",
 162                                 len ? ", " : "", "projquota");
 163         if (f2fs_sb_has_inode_chksum(sbi))
 164                 len += scnprintf(buf + len, PAGE_SIZE - len, "%s%s",
 165                                 len ? ", " : "", "inode_checksum");
 166         if (f2fs_sb_has_flexible_inline_xattr(sbi))
 167                 len += scnprintf(buf + len, PAGE_SIZE - len, "%s%s",
 168                                 len ? ", " : "", "flexible_inline_xattr");
 169         if (f2fs_sb_has_quota_ino(sbi))
 170                 len += scnprintf(buf + len, PAGE_SIZE - len, "%s%s",
 171                                 len ? ", " : "", "quota_ino");
 172         if (f2fs_sb_has_inode_crtime(sbi))
 173                 len += scnprintf(buf + len, PAGE_SIZE - len, "%s%s",
 174                                 len ? ", " : "", "inode_crtime");
 175         if (f2fs_sb_has_lost_found(sbi))
 176                 len += scnprintf(buf + len, PAGE_SIZE - len, "%s%s",
 177                                 len ? ", " : "", "lost_found");
 178         if (f2fs_sb_has_verity(sbi))
 179                 len += scnprintf(buf + len, PAGE_SIZE - len, "%s%s",
 180                                 len ? ", " : "", "verity");
 181         if (f2fs_sb_has_sb_chksum(sbi))
 182                 len += scnprintf(buf + len, PAGE_SIZE - len, "%s%s",
 183                                 len ? ", " : "", "sb_checksum");
 184         if (f2fs_sb_has_casefold(sbi))
 185                 len += scnprintf(buf + len, PAGE_SIZE - len, "%s%s",
 186                                 len ? ", " : "", "casefold");
 187         if (f2fs_sb_has_readonly(sbi))
 188                 len += scnprintf(buf + len, PAGE_SIZE - len, "%s%s",
 189                                 len ? ", " : "", "readonly");
 190         if (f2fs_sb_has_compression(sbi))
 191                 len += scnprintf(buf + len, PAGE_SIZE - len, "%s%s",
 192                                 len ? ", " : "", "compression");
 193         len += scnprintf(buf + len, PAGE_SIZE - len, "%s%s",
 194                                 len ? ", " : "", "pin_file");
 195         len += scnprintf(buf + len, PAGE_SIZE - len, "\n");
 196         return len;
 197 }
 198
 199 static ssize_t current_reserved_blocks_show(struct f2fs_attr *a,
 200                                         struct f2fs_sb_info *sbi, char *buf)
 201 {
 202         return sprintf(buf, "%u\n", sbi->current_reserved_blocks);
 203 }
 204
 205 static ssize_t unusable_show(struct f2fs_attr *a,
 206                 struct f2fs_sb_info *sbi, char *buf)
 207 {
 208         block_t unusable;
 209
 210         if (test_opt(sbi, DISABLE_CHECKPOINT))
 211                 unusable = sbi->unusable_block_count;
 212         else
 213                 unusable = f2fs_get_unusable_blocks(sbi);
 214         return sprintf(buf, "%llu\n", (unsigned long long)unusable);
 215 }
 216
 217 static ssize_t encoding_show(struct f2fs_attr *a,
 218                 struct f2fs_sb_info *sbi, char *buf)
 219 {
 220 #if IS_ENABLED(CONFIG_UNICODE)
 221         struct super_block *sb = sbi->sb;
 222
 223         if (f2fs_sb_has_casefold(sbi))
 224                 return sysfs_emit(buf, "UTF-8 (%d.%d.%d)\n",
 225                         (sb->s_encoding->version >> 16) & 0xff,
 226                         (sb->s_encoding->version >> 8) & 0xff,
 227                         sb->s_encoding->version & 0xff);
 228 #endif
 229         return sprintf(buf, "(none)");
 230 }
 231
 232 static ssize_t mounted_time_sec_show(struct f2fs_attr *a,
 233                 struct f2fs_sb_info *sbi, char *buf)
 234 {
 235         return sprintf(buf, "%llu", SIT_I(sbi)->mounted_time);
 236 }
 237
 238 #ifdef CONFIG_F2FS_STAT_FS
 239 static ssize_t moved_blocks_foreground_show(struct f2fs_attr *a,
 240                                 struct f2fs_sb_info *sbi, char *buf)
 241 {
 242         struct f2fs_stat_info *si = F2FS_STAT(sbi);
 243
 244         return sprintf(buf, "%llu\n",
 245                 (unsigned long long)(si->tot_blks -
 246                         (si->bg_data_blks + si->bg_node_blks)));
 247 }
 248
 249 static ssize_t moved_blocks_background_show(struct f2fs_attr *a,
 250                                 struct f2fs_sb_info *sbi, char *buf)
 251 {
 252         struct f2fs_stat_info *si = F2FS_STAT(sbi);
 253
 254         return sprintf(buf, "%llu\n",
 255                 (unsigned long long)(si->bg_data_blks + si->bg_node_blks));
 256 }
 257
 258 static ssize_t avg_vblocks_show(struct f2fs_attr *a,
 259                 struct f2fs_sb_info *sbi, char *buf)
 260 {
 261         struct f2fs_stat_info *si = F2FS_STAT(sbi);
 262
 263         si->dirty_count = dirty_segments(sbi);
 264         f2fs_update_sit_info(sbi);
 265         return sprintf(buf, "%llu\n", (unsigned long long)(si->avg_vblocks));
 266 }
 267 #endif
 268
 269 static ssize_t main_blkaddr_show(struct f2fs_attr *a,
 270                                 struct f2fs_sb_info *sbi, char *buf)
 271 {
 272         return sysfs_emit(buf, "%llu\n",
 273                         (unsigned long long)MAIN_BLKADDR(sbi));
 274 }
 275
 276 static ssize_t f2fs_sbi_show(struct f2fs_attr *a,
 277                         struct f2fs_sb_info *sbi, char *buf)
 278 {
 279         unsigned char *ptr = NULL;
 280         unsigned int *ui;
 281
 282         ptr = __struct_ptr(sbi, a->struct_type);
 283         if (!ptr)
 284                 return -EINVAL;
 285
 286         if (!strcmp(a->attr.name, "extension_list")) {
 287                 __u8 (*extlist)[F2FS_EXTENSION_LEN] =
 288                                         sbi->raw_super->extension_list;
 289                 int cold_count = le32_to_cpu(sbi->raw_super->extension_count);
 290                 int hot_count = sbi->raw_super->hot_ext_count;
 291                 int len = 0, i;
 292
 293                 len += scnprintf(buf + len, PAGE_SIZE - len,
 294                                                 "cold file extension:\n");
 295                 for (i = 0; i < cold_count; i++)
 296                         len += scnprintf(buf + len, PAGE_SIZE - len, "%s\n",
 297                                                                 extlist[i]);
 298
 299                 len += scnprintf(buf + len, PAGE_SIZE - len,
 300                                                 "hot file extension:\n");
 301                 for (i = cold_count; i < cold_count + hot_count; i++)
 302                         len += scnprintf(buf + len, PAGE_SIZE - len, "%s\n",
 303                                                                 extlist[i]);
 304                 return len;
 305         }
 306
 307         if (!strcmp(a->attr.name, "ckpt_thread_ioprio")) {
 308                 struct ckpt_req_control *cprc = &sbi->cprc_info;
 309                 int len = 0;
 310                 int class = IOPRIO_PRIO_CLASS(cprc->ckpt_thread_ioprio);
 311                 int data = IOPRIO_PRIO_DATA(cprc->ckpt_thread_ioprio);
 312
 313                 if (class == IOPRIO_CLASS_RT)
 314                         len += scnprintf(buf + len, PAGE_SIZE - len, "rt,");
 315                 else if (class == IOPRIO_CLASS_BE)
 316                         len += scnprintf(buf + len, PAGE_SIZE - len, "be,");
 317                 else
 318                         return -EINVAL;
 319
 320                 len += scnprintf(buf + len, PAGE_SIZE - len, "%d\n", data);
 321                 return len;
 322         }
 323
 324 #ifdef CONFIG_F2FS_FS_COMPRESSION
 325         if (!strcmp(a->attr.name, "compr_written_block"))
 326                 return sysfs_emit(buf, "%llu\n", sbi->compr_written_block);
 327
 328         if (!strcmp(a->attr.name, "compr_saved_block"))
 329                 return sysfs_emit(buf, "%llu\n", sbi->compr_saved_block);
 330
 331         if (!strcmp(a->attr.name, "compr_new_inode"))
 332                 return sysfs_emit(buf, "%u\n", sbi->compr_new_inode);
 333 #endif
 334
 335         if (!strcmp(a->attr.name, "gc_urgent"))
 336                 return sysfs_emit(buf, "%s\n",
 337                                 gc_mode_names[sbi->gc_mode]);
 338
 339         if (!strcmp(a->attr.name, "gc_segment_mode"))
 340                 return sysfs_emit(buf, "%s\n",
 341                                 gc_mode_names[sbi->gc_segment_mode]);
 342
 343         if (!strcmp(a->attr.name, "gc_reclaimed_segments")) {
 344                 return sysfs_emit(buf, "%u\n",
 345                         sbi->gc_reclaimed_segs[sbi->gc_segment_mode]);
 346         }
 347
 348         if (!strcmp(a->attr.name, "current_atomic_write")) {
 349                 s64 current_write = atomic64_read(&sbi->current_atomic_write);
 350
 351                 return sysfs_emit(buf, "%lld\n", current_write);
 352         }
 353
 354         if (!strcmp(a->attr.name, "peak_atomic_write"))
 355                 return sysfs_emit(buf, "%lld\n", sbi->peak_atomic_write);
 356
 357         if (!strcmp(a->attr.name, "committed_atomic_block"))
 358                 return sysfs_emit(buf, "%llu\n", sbi->committed_atomic_block);
 359
 360         if (!strcmp(a->attr.name, "revoked_atomic_block"))
 361                 return sysfs_emit(buf, "%llu\n", sbi->revoked_atomic_block);
 362
 363         ui = (unsigned int *)(ptr + a->offset);
 364
 365         return sprintf(buf, "%u\n", *ui);
 366 }
 367
 368 static ssize_t __sbi_store(struct f2fs_attr *a,
 369                         struct f2fs_sb_info *sbi,
 370                         const char *buf, size_t count)
 371 {
 372         unsigned char *ptr;
 373         unsigned long t;
 374         unsigned int *ui;
 375         ssize_t ret;
 376
 377         ptr = __struct_ptr(sbi, a->struct_type);
 378         if (!ptr)
 379                 return -EINVAL;
 380
 381         if (!strcmp(a->attr.name, "extension_list")) {
 382                 const char *name = strim((char *)buf);
 383                 bool set = true, hot;
 384
 385                 if (!strncmp(name, "[h]", 3))
 386                         hot = true;
 387                 else if (!strncmp(name, "[c]", 3))
 388                         hot = false;
 389                 else
 390                         return -EINVAL;
 391
 392                 name += 3;
 393
 394                 if (*name == '!') {
 395                         name++;
 396                         set = false;
 397                 }
 398
 399                 if (!strlen(name) || strlen(name) >= F2FS_EXTENSION_LEN)
 400                         return -EINVAL;
 401
 402                 f2fs_down_write(&sbi->sb_lock);
 403
 404                 ret = f2fs_update_extension_list(sbi, name, hot, set);
 405                 if (ret)
 406                         goto out;
 407
 408                 ret = f2fs_commit_super(sbi, false);
 409                 if (ret)
 410                         f2fs_update_extension_list(sbi, name, hot, !set);
 411 out:
 412                 f2fs_up_write(&sbi->sb_lock);
 413                 return ret ? ret : count;
 414         }
 415
 416         if (!strcmp(a->attr.name, "ckpt_thread_ioprio")) {
 417                 const char *name = strim((char *)buf);
 418                 struct ckpt_req_control *cprc = &sbi->cprc_info;
 419                 int class;
 420                 long data;
 421                 int ret;
 422
 423                 if (!strncmp(name, "rt,", 3))
 424                         class = IOPRIO_CLASS_RT;
 425                 else if (!strncmp(name, "be,", 3))
 426                         class = IOPRIO_CLASS_BE;
 427                 else
 428                         return -EINVAL;
 429
 430                 name += 3;
 431                 ret = kstrtol(name, 10, &data);
 432                 if (ret)
 433                         return ret;
 434                 if (data >= IOPRIO_NR_LEVELS || data < 0)
 435                         return -EINVAL;
 436
 437                 cprc->ckpt_thread_ioprio = IOPRIO_PRIO_VALUE(class, data);
 438                 if (test_opt(sbi, MERGE_CHECKPOINT)) {
 439                         ret = set_task_ioprio(cprc->f2fs_issue_ckpt,
 440                                         cprc->ckpt_thread_ioprio);
 441                         if (ret)
 442                                 return ret;
 443                 }
 444
 445                 return count;
 446         }
 447
 448         ui = (unsigned int *)(ptr + a->offset);
 449
 450         ret = kstrtoul(skip_spaces(buf), 0, &t);
 451         if (ret < 0)
 452                 return ret;
 453 #ifdef CONFIG_F2FS_FAULT_INJECTION
 454         if (a->struct_type == FAULT_INFO_TYPE && t >= BIT(FAULT_MAX))
 455                 return -EINVAL;
 456         if (a->struct_type == FAULT_INFO_RATE && t >= UINT_MAX)
 457                 return -EINVAL;
 458 #endif
 459         if (a->struct_type == RESERVED_BLOCKS) {
 460                 spin_lock(&sbi->stat_lock);
 461                 if (t > (unsigned long)(sbi->user_block_count -
 462                                 F2FS_OPTION(sbi).root_reserved_blocks -
 463                                 sbi->blocks_per_seg *
 464                                 SM_I(sbi)->additional_reserved_segments)) {
 465                         spin_unlock(&sbi->stat_lock);
 466                         return -EINVAL;
 467                 }
 468                 *ui = t;
 469                 sbi->current_reserved_blocks = min(sbi->reserved_blocks,
 470                                 sbi->user_block_count - valid_user_blocks(sbi));
 471                 spin_unlock(&sbi->stat_lock);
 472                 return count;
 473         }
 474
 475         if (!strcmp(a->attr.name, "discard_granularity")) {
 476                 if (t == 0 || t > MAX_PLIST_NUM)
 477                         return -EINVAL;
 478                 if (!f2fs_block_unit_discard(sbi))
 479                         return -EINVAL;
 480                 if (t == *ui)
 481                         return count;
 482                 *ui = t;
 483                 return count;
 484         }
 485
 486         if (!strcmp(a->attr.name, "migration_granularity")) {
 487                 if (t == 0 || t > sbi->segs_per_sec)
 488                         return -EINVAL;
 489         }
 490
 491         if (!strcmp(a->attr.name, "trim_sections"))
 492                 return -EINVAL;
 493
 494         if (!strcmp(a->attr.name, "gc_urgent")) {
 495                 if (t == 0) {
 496                         sbi->gc_mode = GC_NORMAL;
 497                 } else if (t == 1) {
 498                         sbi->gc_mode = GC_URGENT_HIGH;
 499                         if (sbi->gc_thread) {
 500                                 sbi->gc_thread->gc_wake = 1;
 501                                 wake_up_interruptible_all(
 502                                         &sbi->gc_thread->gc_wait_queue_head);
 503                                 wake_up_discard_thread(sbi, true);
 504                         }
 505                 } else if (t == 2) {
 506                         sbi->gc_mode = GC_URGENT_LOW;
 507                 } else if (t == 3) {
 508                         sbi->gc_mode = GC_URGENT_MID;
 509                         if (sbi->gc_thread) {
 510                                 sbi->gc_thread->gc_wake = 1;
 511                                 wake_up_interruptible_all(
 512                                         &sbi->gc_thread->gc_wait_queue_head);
 513                         }
 514                 } else {
 515                         return -EINVAL;
 516                 }
 517                 return count;
 518         }
 519         if (!strcmp(a->attr.name, "gc_idle")) {
 520                 if (t == GC_IDLE_CB) {
 521                         sbi->gc_mode = GC_IDLE_CB;
 522                 } else if (t == GC_IDLE_GREEDY) {
 523                         sbi->gc_mode = GC_IDLE_GREEDY;
 524                 } else if (t == GC_IDLE_AT) {
 525                         if (!sbi->am.atgc_enabled)
 526                                 return -EINVAL;
 527                         sbi->gc_mode = GC_IDLE_AT;
 528                 } else {
 529                         sbi->gc_mode = GC_NORMAL;
 530                 }
 531                 return count;
 532         }
 533
 534         if (!strcmp(a->attr.name, "gc_urgent_high_remaining")) {
 535                 spin_lock(&sbi->gc_urgent_high_lock);
 536                 sbi->gc_urgent_high_remaining = t;
 537                 spin_unlock(&sbi->gc_urgent_high_lock);
 538
 539                 return count;
 540         }
 541
 542 #ifdef CONFIG_F2FS_IOSTAT
 543         if (!strcmp(a->attr.name, "iostat_enable")) {
 544                 sbi->iostat_enable = !!t;
 545                 if (!sbi->iostat_enable)
 546                         f2fs_reset_iostat(sbi);
 547                 return count;
 548         }
 549
 550         if (!strcmp(a->attr.name, "iostat_period_ms")) {
 551                 if (t < MIN_IOSTAT_PERIOD_MS || t > MAX_IOSTAT_PERIOD_MS)
 552                         return -EINVAL;
 553                 spin_lock_irq(&sbi->iostat_lock);
 554                 sbi->iostat_period_ms = (unsigned int)t;
 555                 spin_unlock_irq(&sbi->iostat_lock);
 556                 return count;
 557         }
 558 #endif
 559
 560 #ifdef CONFIG_F2FS_FS_COMPRESSION
 561         if (!strcmp(a->attr.name, "compr_written_block") ||
 562                 !strcmp(a->attr.name, "compr_saved_block")) {
 563                 if (t != 0)
 564                         return -EINVAL;
 565                 sbi->compr_written_block = 0;
 566                 sbi->compr_saved_block = 0;
 567                 return count;
 568         }
 569
 570         if (!strcmp(a->attr.name, "compr_new_inode")) {
 571                 if (t != 0)
 572                         return -EINVAL;
 573                 sbi->compr_new_inode = 0;
 574                 return count;
 575         }
 576 #endif
 577
 578         if (!strcmp(a->attr.name, "atgc_candidate_ratio")) {
 579                 if (t > 100)
 580                         return -EINVAL;
 581                 sbi->am.candidate_ratio = t;
 582                 return count;
 583         }
 584
 585         if (!strcmp(a->attr.name, "atgc_age_weight")) {
 586                 if (t > 100)
 587                         return -EINVAL;
 588                 sbi->am.age_weight = t;
 589                 return count;
 590         }
 591
 592         if (!strcmp(a->attr.name, "gc_segment_mode")) {
 593                 if (t < MAX_GC_MODE)
 594                         sbi->gc_segment_mode = t;
 595                 else
 596                         return -EINVAL;
 597                 return count;
 598         }
 599
 600         if (!strcmp(a->attr.name, "gc_reclaimed_segments")) {
 601                 if (t != 0)
 602                         return -EINVAL;
 603                 sbi->gc_reclaimed_segs[sbi->gc_segment_mode] = 0;
 604                 return count;
 605         }
 606
 607         if (!strcmp(a->attr.name, "seq_file_ra_mul")) {
 608                 if (t >= MIN_RA_MUL && t <= MAX_RA_MUL)
 609                         sbi->seq_file_ra_mul = t;
 610                 else
 611                         return -EINVAL;
 612                 return count;
 613         }
 614
 615         if (!strcmp(a->attr.name, "max_fragment_chunk")) {
 616                 if (t >= MIN_FRAGMENT_SIZE && t <= MAX_FRAGMENT_SIZE)
 617                         sbi->max_fragment_chunk = t;
 618                 else
 619                         return -EINVAL;
 620                 return count;
 621         }
 622
 623         if (!strcmp(a->attr.name, "max_fragment_hole")) {
 624                 if (t >= MIN_FRAGMENT_SIZE && t <= MAX_FRAGMENT_SIZE)
 625                         sbi->max_fragment_hole = t;
 626                 else
 627                         return -EINVAL;
 628                 return count;
 629         }
 630
 631         if (!strcmp(a->attr.name, "peak_atomic_write")) {
 632                 if (t != 0)
 633                         return -EINVAL;
 634                 sbi->peak_atomic_write = 0;
 635                 return count;
 636         }
 637
 638         if (!strcmp(a->attr.name, "committed_atomic_block")) {
 639                 if (t != 0)
 640                         return -EINVAL;
 641                 sbi->committed_atomic_block = 0;
 642                 return count;
 643         }
 644
 645         if (!strcmp(a->attr.name, "revoked_atomic_block")) {
 646                 if (t != 0)
 647                         return -EINVAL;
 648                 sbi->revoked_atomic_block = 0;
 649                 return count;
 650         }
 651
 652         *ui = (unsigned int)t;
 653
 654         return count;
 655 }
 656
 657 static ssize_t f2fs_sbi_store(struct f2fs_attr *a,
 658                         struct f2fs_sb_info *sbi,
 659                         const char *buf, size_t count)
 660 {
 661         ssize_t ret;
 662         bool gc_entry = (!strcmp(a->attr.name, "gc_urgent") ||
 663                                         a->struct_type == GC_THREAD);
 664
 665         if (gc_entry) {
 666                 if (!down_read_trylock(&sbi->sb->s_umount))
 667                         return -EAGAIN;
 668         }
 669         ret = __sbi_store(a, sbi, buf, count);
 670         if (gc_entry)
 671                 up_read(&sbi->sb->s_umount);
 672
 673         return ret;
 674 }
 675
 676 static ssize_t f2fs_attr_show(struct kobject *kobj,
 677                                 struct attribute *attr, char *buf)
 678 {
 679         struct f2fs_sb_info *sbi = container_of(kobj, struct f2fs_sb_info,
 680                                                                 s_kobj);
 681         struct f2fs_attr *a = container_of(attr, struct f2fs_attr, attr);
 682
 683         return a->show ? a->show(a, sbi, buf) : 0;
 684 }
 685
 686 static ssize_t f2fs_attr_store(struct kobject *kobj, struct attribute *attr,
 687                                                 const char *buf, size_t len)
 688 {
 689         struct f2fs_sb_info *sbi = container_of(kobj, struct f2fs_sb_info,
 690                                                                         s_kobj);
 691         struct f2fs_attr *a = container_of(attr, struct f2fs_attr, attr);
 692
 693         return a->store ? a->store(a, sbi, buf, len) : 0;
 694 }
 695
 696 static void f2fs_sb_release(struct kobject *kobj)
 697 {
 698         struct f2fs_sb_info *sbi = container_of(kobj, struct f2fs_sb_info,
 699                                                                 s_kobj);
 700         complete(&sbi->s_kobj_unregister);
 701 }
 702
 703 /*
 704  * Note that there are three feature list entries:
 705  * 1) /sys/fs/f2fs/features
 706  *   : shows runtime features supported by in-kernel f2fs along with Kconfig.
 707  *     - ref. F2FS_FEATURE_RO_ATTR()
 708  *
 709  * 2) /sys/fs/f2fs/$s_id/features <deprecated>
 710  *   : shows on-disk features enabled by mkfs.f2fs, used for old kernels. This
 711  *     won't add new feature anymore, and thus, users should check entries in 3)
 712  *     instead of this 2).
 713  *
 714  * 3) /sys/fs/f2fs/$s_id/feature_list
 715  *   : shows on-disk features enabled by mkfs.f2fs per instance, which follows
 716  *     sysfs entry rule where each entry should expose single value.
 717  *     This list covers old feature list provided by 2) and beyond. Therefore,
 718  *     please add new on-disk feature in this list only.
 719  *     - ref. F2FS_SB_FEATURE_RO_ATTR()
 720  */
 721 static ssize_t f2fs_feature_show(struct f2fs_attr *a,
 722                 struct f2fs_sb_info *sbi, char *buf)
 723 {
 724         return sprintf(buf, "supported\n");
 725 }
 726
 727 #define F2FS_FEATURE_RO_ATTR(_name)                             \
 728 static struct f2fs_attr f2fs_attr_##_name = {                   \
 729         .attr = {.name = __stringify(_name), .mode = 0444 },    \
 730         .show   = f2fs_feature_show,                            \
 731 }
 732
 733 static ssize_t f2fs_sb_feature_show(struct f2fs_attr *a,
 734                 struct f2fs_sb_info *sbi, char *buf)
 735 {
 736         if (F2FS_HAS_FEATURE(sbi, a->id))
 737                 return sprintf(buf, "supported\n");
 738         return sprintf(buf, "unsupported\n");
 739 }
 740
 741 #define F2FS_SB_FEATURE_RO_ATTR(_name, _feat)                   \
 742 static struct f2fs_attr f2fs_attr_sb_##_name = {                \
 743         .attr = {.name = __stringify(_name), .mode = 0444 },    \
 744         .show   = f2fs_sb_feature_show,                         \
 745         .id     = F2FS_FEATURE_##_feat,                         \
 746 }
 747
 748 #define F2FS_ATTR_OFFSET(_struct_type, _name, _mode, _show, _store, _offset) \
 749 static struct f2fs_attr f2fs_attr_##_name = {                   \
 750         .attr = {.name = __stringify(_name), .mode = _mode },   \
 751         .show   = _show,                                        \
 752         .store  = _store,                                       \
 753         .struct_type = _struct_type,                            \
 754         .offset = _offset                                       \
 755 }
 756
 757 #define F2FS_RO_ATTR(struct_type, struct_name, name, elname)    \
 758         F2FS_ATTR_OFFSET(struct_type, name, 0444,               \
 759                 f2fs_sbi_show, NULL,                            \
 760                 offsetof(struct struct_name, elname))
 761
 762 #define F2FS_RW_ATTR(struct_type, struct_name, name, elname)    \
 763         F2FS_ATTR_OFFSET(struct_type, name, 0644,               \
 764                 f2fs_sbi_show, f2fs_sbi_store,                  \
 765                 offsetof(struct struct_name, elname))
 766
 767 #define F2FS_GENERAL_RO_ATTR(name) \
 768 static struct f2fs_attr f2fs_attr_##name = __ATTR(name, 0444, name##_show, NULL)
 769
 770 #define F2FS_STAT_ATTR(_struct_type, _struct_name, _name, _elname)      \
 771 static struct f2fs_attr f2fs_attr_##_name = {                   \
 772         .attr = {.name = __stringify(_name), .mode = 0444 },    \
 773         .show = f2fs_sbi_show,                                  \
 774         .struct_type = _struct_type,                            \
 775         .offset = offsetof(struct _struct_name, _elname),       \
 776 }
 777
 778 F2FS_RW_ATTR(GC_THREAD, f2fs_gc_kthread, gc_urgent_sleep_time,
 779                                                         urgent_sleep_time);
 780 F2FS_RW_ATTR(GC_THREAD, f2fs_gc_kthread, gc_min_sleep_time, min_sleep_time);
 781 F2FS_RW_ATTR(GC_THREAD, f2fs_gc_kthread, gc_max_sleep_time, max_sleep_time);
 782 F2FS_RW_ATTR(GC_THREAD, f2fs_gc_kthread, gc_no_gc_sleep_time, no_gc_sleep_time);
 783 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, gc_idle, gc_mode);
 784 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, gc_urgent, gc_mode);
 785 F2FS_RW_ATTR(SM_INFO, f2fs_sm_info, reclaim_segments, rec_prefree_segments);
 786 F2FS_RW_ATTR(DCC_INFO, discard_cmd_control, max_small_discards, max_discards);
 787 F2FS_RW_ATTR(DCC_INFO, discard_cmd_control, max_discard_request, max_discard_request);
 788 F2FS_RW_ATTR(DCC_INFO, discard_cmd_control, min_discard_issue_time, min_discard_issue_time);
 789 F2FS_RW_ATTR(DCC_INFO, discard_cmd_control, mid_discard_issue_time, mid_discard_issue_time);
 790 F2FS_RW_ATTR(DCC_INFO, discard_cmd_control, max_discard_issue_time, max_discard_issue_time);
 791 F2FS_RW_ATTR(DCC_INFO, discard_cmd_control, discard_granularity, discard_granularity);
 792 F2FS_RW_ATTR(RESERVED_BLOCKS, f2fs_sb_info, reserved_blocks, reserved_blocks);
 793 F2FS_RW_ATTR(SM_INFO, f2fs_sm_info, batched_trim_sections, trim_sections);
 794 F2FS_RW_ATTR(SM_INFO, f2fs_sm_info, ipu_policy, ipu_policy);
 795 F2FS_RW_ATTR(SM_INFO, f2fs_sm_info, min_ipu_util, min_ipu_util);
 796 F2FS_RW_ATTR(SM_INFO, f2fs_sm_info, min_fsync_blocks, min_fsync_blocks);
 797 F2FS_RW_ATTR(SM_INFO, f2fs_sm_info, min_seq_blocks, min_seq_blocks);
 798 F2FS_RW_ATTR(SM_INFO, f2fs_sm_info, min_hot_blocks, min_hot_blocks);
 799 F2FS_RW_ATTR(SM_INFO, f2fs_sm_info, min_ssr_sections, min_ssr_sections);
 800 F2FS_RW_ATTR(NM_INFO, f2fs_nm_info, ram_thresh, ram_thresh);
 801 F2FS_RW_ATTR(NM_INFO, f2fs_nm_info, ra_nid_pages, ra_nid_pages);
 802 F2FS_RW_ATTR(NM_INFO, f2fs_nm_info, dirty_nats_ratio, dirty_nats_ratio);
 803 F2FS_RW_ATTR(NM_INFO, f2fs_nm_info, max_roll_forward_node_blocks, max_rf_node_blocks);
 804 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, max_victim_search, max_victim_search);
 805 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, migration_granularity, migration_granularity);
 806 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, dir_level, dir_level);
 807 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, cp_interval, interval_time[CP_TIME]);
 808 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, idle_interval, interval_time[REQ_TIME]);
 809 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, discard_idle_interval,
 810                                         interval_time[DISCARD_TIME]);
 811 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, gc_idle_interval, interval_time[GC_TIME]);
 812 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info,
 813                 umount_discard_timeout, interval_time[UMOUNT_DISCARD_TIMEOUT]);
 814 #ifdef CONFIG_F2FS_IOSTAT
 815 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, iostat_enable, iostat_enable);
 816 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, iostat_period_ms, iostat_period_ms);
 817 #endif
 818 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, readdir_ra, readdir_ra);
 819 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, max_io_bytes, max_io_bytes);
 820 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, gc_pin_file_thresh, gc_pin_file_threshold);
 821 F2FS_RW_ATTR(F2FS_SBI, f2fs_super_block, extension_list, extension_list);
 822 #ifdef CONFIG_F2FS_FAULT_INJECTION
 823 F2FS_RW_ATTR(FAULT_INFO_RATE, f2fs_fault_info, inject_rate, inject_rate);
 824 F2FS_RW_ATTR(FAULT_INFO_TYPE, f2fs_fault_info, inject_type, inject_type);
 825 #endif
 826 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, data_io_flag, data_io_flag);
 827 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, node_io_flag, node_io_flag);
 828 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, gc_urgent_high_remaining, gc_urgent_high_remaining);
 829 F2FS_RW_ATTR(CPRC_INFO, ckpt_req_control, ckpt_thread_ioprio, ckpt_thread_ioprio);
 830 F2FS_GENERAL_RO_ATTR(dirty_segments);
 831 F2FS_GENERAL_RO_ATTR(free_segments);
 832 F2FS_GENERAL_RO_ATTR(ovp_segments);
 833 F2FS_GENERAL_RO_ATTR(lifetime_write_kbytes);
 834 F2FS_GENERAL_RO_ATTR(features);
 835 F2FS_GENERAL_RO_ATTR(current_reserved_blocks);
 836 F2FS_GENERAL_RO_ATTR(unusable);
 837 F2FS_GENERAL_RO_ATTR(encoding);
 838 F2FS_GENERAL_RO_ATTR(mounted_time_sec);
 839 F2FS_GENERAL_RO_ATTR(main_blkaddr);
 840 F2FS_GENERAL_RO_ATTR(pending_discard);
 841 #ifdef CONFIG_F2FS_STAT_FS
 842 F2FS_STAT_ATTR(STAT_INFO, f2fs_stat_info, cp_foreground_calls, cp_count);
 843 F2FS_STAT_ATTR(STAT_INFO, f2fs_stat_info, cp_background_calls, bg_cp_count);
 844 F2FS_STAT_ATTR(STAT_INFO, f2fs_stat_info, gc_foreground_calls, call_count);
 845 F2FS_STAT_ATTR(STAT_INFO, f2fs_stat_info, gc_background_calls, bg_gc);
 846 F2FS_GENERAL_RO_ATTR(moved_blocks_background);
 847 F2FS_GENERAL_RO_ATTR(moved_blocks_foreground);
 848 F2FS_GENERAL_RO_ATTR(avg_vblocks);
 849 #endif
 850
 851 #ifdef CONFIG_FS_ENCRYPTION
 852 F2FS_FEATURE_RO_ATTR(encryption);
 853 F2FS_FEATURE_RO_ATTR(test_dummy_encryption_v2);
 854 #if IS_ENABLED(CONFIG_UNICODE)
 855 F2FS_FEATURE_RO_ATTR(encrypted_casefold);
 856 #endif
 857 #endif /* CONFIG_FS_ENCRYPTION */
 858 #ifdef CONFIG_BLK_DEV_ZONED
 859 F2FS_FEATURE_RO_ATTR(block_zoned);
 860 F2FS_RO_ATTR(F2FS_SBI, f2fs_sb_info, unusable_blocks_per_sec,
 861                                         unusable_blocks_per_sec);
 862 #endif
 863 F2FS_FEATURE_RO_ATTR(atomic_write);
 864 F2FS_FEATURE_RO_ATTR(extra_attr);
 865 F2FS_FEATURE_RO_ATTR(project_quota);
 866 F2FS_FEATURE_RO_ATTR(inode_checksum);
 867 F2FS_FEATURE_RO_ATTR(flexible_inline_xattr);
 868 F2FS_FEATURE_RO_ATTR(quota_ino);
 869 F2FS_FEATURE_RO_ATTR(inode_crtime);
 870 F2FS_FEATURE_RO_ATTR(lost_found);
 871 #ifdef CONFIG_FS_VERITY
 872 F2FS_FEATURE_RO_ATTR(verity);
 873 #endif
 874 F2FS_FEATURE_RO_ATTR(sb_checksum);
 875 #if IS_ENABLED(CONFIG_UNICODE)
 876 F2FS_FEATURE_RO_ATTR(casefold);
 877 #endif
 878 F2FS_FEATURE_RO_ATTR(readonly);
 879 #ifdef CONFIG_F2FS_FS_COMPRESSION
 880 F2FS_FEATURE_RO_ATTR(compression);
 881 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, compr_written_block, compr_written_block);
 882 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, compr_saved_block, compr_saved_block);
 883 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, compr_new_inode, compr_new_inode);
 884 #endif
 885 F2FS_FEATURE_RO_ATTR(pin_file);
 886
 887 /* For ATGC */
 888 F2FS_RW_ATTR(ATGC_INFO, atgc_management, atgc_candidate_ratio, candidate_ratio);
 889 F2FS_RW_ATTR(ATGC_INFO, atgc_management, atgc_candidate_count, max_candidate_count);
 890 F2FS_RW_ATTR(ATGC_INFO, atgc_management, atgc_age_weight, age_weight);
 891 F2FS_RW_ATTR(ATGC_INFO, atgc_management, atgc_age_threshold, age_threshold);
 892
 893 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, seq_file_ra_mul, seq_file_ra_mul);
 894 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, gc_segment_mode, gc_segment_mode);
 895 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, gc_reclaimed_segments, gc_reclaimed_segs);
 896 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, max_fragment_chunk, max_fragment_chunk);
 897 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, max_fragment_hole, max_fragment_hole);
 898
 899 /* For atomic write */
 900 F2FS_RO_ATTR(F2FS_SBI, f2fs_sb_info, current_atomic_write, current_atomic_write);
 901 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, peak_atomic_write, peak_atomic_write);
 902 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, committed_atomic_block, committed_atomic_block);
 903 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, revoked_atomic_block, revoked_atomic_block);
 904
 905 #define ATTR_LIST(name) (&f2fs_attr_##name.attr)
 906 static struct attribute *f2fs_attrs[] = {
 907         ATTR_LIST(gc_urgent_sleep_time),
 908         ATTR_LIST(gc_min_sleep_time),
 909         ATTR_LIST(gc_max_sleep_time),
 910         ATTR_LIST(gc_no_gc_sleep_time),
 911         ATTR_LIST(gc_idle),
 912         ATTR_LIST(gc_urgent),
 913         ATTR_LIST(reclaim_segments),
 914         ATTR_LIST(main_blkaddr),
 915         ATTR_LIST(max_small_discards),
 916         ATTR_LIST(max_discard_request),
 917         ATTR_LIST(min_discard_issue_time),
 918         ATTR_LIST(mid_discard_issue_time),
 919         ATTR_LIST(max_discard_issue_time),
 920         ATTR_LIST(discard_granularity),
 921         ATTR_LIST(pending_discard),
 922         ATTR_LIST(batched_trim_sections),
 923         ATTR_LIST(ipu_policy),
 924         ATTR_LIST(min_ipu_util),
 925         ATTR_LIST(min_fsync_blocks),
 926         ATTR_LIST(min_seq_blocks),
 927         ATTR_LIST(min_hot_blocks),
 928         ATTR_LIST(min_ssr_sections),
 929         ATTR_LIST(max_victim_search),
 930         ATTR_LIST(migration_granularity),
 931         ATTR_LIST(dir_level),
 932         ATTR_LIST(ram_thresh),
 933         ATTR_LIST(ra_nid_pages),
 934         ATTR_LIST(dirty_nats_ratio),
 935         ATTR_LIST(max_roll_forward_node_blocks),
 936         ATTR_LIST(cp_interval),
 937         ATTR_LIST(idle_interval),
 938         ATTR_LIST(discard_idle_interval),
 939         ATTR_LIST(gc_idle_interval),
 940         ATTR_LIST(umount_discard_timeout),
 941 #ifdef CONFIG_F2FS_IOSTAT
 942         ATTR_LIST(iostat_enable),
 943         ATTR_LIST(iostat_period_ms),
 944 #endif
 945         ATTR_LIST(readdir_ra),
 946         ATTR_LIST(max_io_bytes),
 947         ATTR_LIST(gc_pin_file_thresh),
 948         ATTR_LIST(extension_list),
 949 #ifdef CONFIG_F2FS_FAULT_INJECTION
 950         ATTR_LIST(inject_rate),
 951         ATTR_LIST(inject_type),
 952 #endif
 953         ATTR_LIST(data_io_flag),
 954         ATTR_LIST(node_io_flag),
 955         ATTR_LIST(gc_urgent_high_remaining),
 956         ATTR_LIST(ckpt_thread_ioprio),
 957         ATTR_LIST(dirty_segments),
 958         ATTR_LIST(free_segments),
 959         ATTR_LIST(ovp_segments),
 960         ATTR_LIST(unusable),
 961         ATTR_LIST(lifetime_write_kbytes),
 962         ATTR_LIST(features),
 963         ATTR_LIST(reserved_blocks),
 964         ATTR_LIST(current_reserved_blocks),
 965         ATTR_LIST(encoding),
 966         ATTR_LIST(mounted_time_sec),
 967 #ifdef CONFIG_F2FS_STAT_FS
 968         ATTR_LIST(cp_foreground_calls),
 969         ATTR_LIST(cp_background_calls),
 970         ATTR_LIST(gc_foreground_calls),
 971         ATTR_LIST(gc_background_calls),
 972         ATTR_LIST(moved_blocks_foreground),
 973         ATTR_LIST(moved_blocks_background),
 974         ATTR_LIST(avg_vblocks),
 975 #endif
 976 #ifdef CONFIG_BLK_DEV_ZONED
 977         ATTR_LIST(unusable_blocks_per_sec),
 978 #endif
 979 #ifdef CONFIG_F2FS_FS_COMPRESSION
 980         ATTR_LIST(compr_written_block),
 981         ATTR_LIST(compr_saved_block),
 982         ATTR_LIST(compr_new_inode),
 983 #endif
 984         /* For ATGC */
 985         ATTR_LIST(atgc_candidate_ratio),
 986         ATTR_LIST(atgc_candidate_count),
 987         ATTR_LIST(atgc_age_weight),
 988         ATTR_LIST(atgc_age_threshold),
 989         ATTR_LIST(seq_file_ra_mul),
 990         ATTR_LIST(gc_segment_mode),
 991         ATTR_LIST(gc_reclaimed_segments),
 992         ATTR_LIST(max_fragment_chunk),
 993         ATTR_LIST(max_fragment_hole),
 994         ATTR_LIST(current_atomic_write),
 995         ATTR_LIST(peak_atomic_write),
 996         ATTR_LIST(committed_atomic_block),
 997         ATTR_LIST(revoked_atomic_block),
 998         NULL,
 999 };
1000 ATTRIBUTE_GROUPS(f2fs);
1001
1002 static struct attribute *f2fs_feat_attrs[] = {
1003 #ifdef CONFIG_FS_ENCRYPTION
1004         ATTR_LIST(encryption),
1005         ATTR_LIST(test_dummy_encryption_v2),
1006 #if IS_ENABLED(CONFIG_UNICODE)
1007         ATTR_LIST(encrypted_casefold),
1008 #endif
1009 #endif /* CONFIG_FS_ENCRYPTION */
1010 #ifdef CONFIG_BLK_DEV_ZONED
1011         ATTR_LIST(block_zoned),
1012 #endif
1013         ATTR_LIST(atomic_write),
1014         ATTR_LIST(extra_attr),
1015         ATTR_LIST(project_quota),
1016         ATTR_LIST(inode_checksum),
1017         ATTR_LIST(flexible_inline_xattr),
1018         ATTR_LIST(quota_ino),
1019         ATTR_LIST(inode_crtime),
1020         ATTR_LIST(lost_found),
1021 #ifdef CONFIG_FS_VERITY
1022         ATTR_LIST(verity),
1023 #endif
1024         ATTR_LIST(sb_checksum),
1025 #if IS_ENABLED(CONFIG_UNICODE)
1026         ATTR_LIST(casefold),
1027 #endif
1028         ATTR_LIST(readonly),
1029 #ifdef CONFIG_F2FS_FS_COMPRESSION
1030         ATTR_LIST(compression),
1031 #endif
1032         ATTR_LIST(pin_file),
1033         NULL,
1034 };
1035 ATTRIBUTE_GROUPS(f2fs_feat);
1036
1037 F2FS_GENERAL_RO_ATTR(sb_status);
1038 F2FS_GENERAL_RO_ATTR(cp_status);
1039 static struct attribute *f2fs_stat_attrs[] = {
1040         ATTR_LIST(sb_status),
1041         ATTR_LIST(cp_status),
1042         NULL,
1043 };
1044 ATTRIBUTE_GROUPS(f2fs_stat);
1045
1046 F2FS_SB_FEATURE_RO_ATTR(encryption, ENCRYPT);
1047 F2FS_SB_FEATURE_RO_ATTR(block_zoned, BLKZONED);
1048 F2FS_SB_FEATURE_RO_ATTR(extra_attr, EXTRA_ATTR);
1049 F2FS_SB_FEATURE_RO_ATTR(project_quota, PRJQUOTA);
1050 F2FS_SB_FEATURE_RO_ATTR(inode_checksum, INODE_CHKSUM);
1051 F2FS_SB_FEATURE_RO_ATTR(flexible_inline_xattr, FLEXIBLE_INLINE_XATTR);
1052 F2FS_SB_FEATURE_RO_ATTR(quota_ino, QUOTA_INO);
1053 F2FS_SB_FEATURE_RO_ATTR(inode_crtime, INODE_CRTIME);
1054 F2FS_SB_FEATURE_RO_ATTR(lost_found, LOST_FOUND);
1055 F2FS_SB_FEATURE_RO_ATTR(verity, VERITY);
1056 F2FS_SB_FEATURE_RO_ATTR(sb_checksum, SB_CHKSUM);
1057 F2FS_SB_FEATURE_RO_ATTR(casefold, CASEFOLD);
1058 F2FS_SB_FEATURE_RO_ATTR(compression, COMPRESSION);
1059 F2FS_SB_FEATURE_RO_ATTR(readonly, RO);
1060
1061 static struct attribute *f2fs_sb_feat_attrs[] = {
1062         ATTR_LIST(sb_encryption),
1063         ATTR_LIST(sb_block_zoned),
1064         ATTR_LIST(sb_extra_attr),
1065         ATTR_LIST(sb_project_quota),
1066         ATTR_LIST(sb_inode_checksum),
1067         ATTR_LIST(sb_flexible_inline_xattr),
1068         ATTR_LIST(sb_quota_ino),
1069         ATTR_LIST(sb_inode_crtime),
1070         ATTR_LIST(sb_lost_found),
1071         ATTR_LIST(sb_verity),
1072         ATTR_LIST(sb_sb_checksum),
1073         ATTR_LIST(sb_casefold),
1074         ATTR_LIST(sb_compression),
1075         ATTR_LIST(sb_readonly),
1076         NULL,
1077 };
1078 ATTRIBUTE_GROUPS(f2fs_sb_feat);
1079
1080 static const struct sysfs_ops f2fs_attr_ops = {
1081         .show   = f2fs_attr_show,
1082         .store  = f2fs_attr_store,
1083 };
1084
1085 static struct kobj_type f2fs_sb_ktype = {
1086         .default_groups = f2fs_groups,
1087         .sysfs_ops      = &f2fs_attr_ops,
1088         .release        = f2fs_sb_release,
1089 };
1090
1091 static struct kobj_type f2fs_ktype = {
1092         .sysfs_ops      = &f2fs_attr_ops,
1093 };
1094
1095 static struct kset f2fs_kset = {
1096         .kobj   = {.ktype = &f2fs_ktype},
1097 };
1098
1099 static struct kobj_type f2fs_feat_ktype = {
1100         .default_groups = f2fs_feat_groups,
1101         .sysfs_ops      = &f2fs_attr_ops,
1102 };
1103
1104 static struct kobject f2fs_feat = {
1105         .kset   = &f2fs_kset,
1106 };
1107
1108 static ssize_t f2fs_stat_attr_show(struct kobject *kobj,
1109                                 struct attribute *attr, char *buf)
1110 {
1111         struct f2fs_sb_info *sbi = container_of(kobj, struct f2fs_sb_info,
1112                                                                 s_stat_kobj);
1113         struct f2fs_attr *a = container_of(attr, struct f2fs_attr, attr);
1114
1115         return a->show ? a->show(a, sbi, buf) : 0;
1116 }
1117
1118 static ssize_t f2fs_stat_attr_store(struct kobject *kobj, struct attribute *attr,
1119                                                 const char *buf, size_t len)
1120 {
1121         struct f2fs_sb_info *sbi = container_of(kobj, struct f2fs_sb_info,
1122                                                                 s_stat_kobj);
1123         struct f2fs_attr *a = container_of(attr, struct f2fs_attr, attr);
1124
1125         return a->store ? a->store(a, sbi, buf, len) : 0;
1126 }
1127
1128 static void f2fs_stat_kobj_release(struct kobject *kobj)
1129 {
1130         struct f2fs_sb_info *sbi = container_of(kobj, struct f2fs_sb_info,
1131                                                                 s_stat_kobj);
1132         complete(&sbi->s_stat_kobj_unregister);
1133 }
1134
1135 static const struct sysfs_ops f2fs_stat_attr_ops = {
1136         .show   = f2fs_stat_attr_show,
1137         .store  = f2fs_stat_attr_store,
1138 };
1139
1140 static struct kobj_type f2fs_stat_ktype = {
1141         .default_groups = f2fs_stat_groups,
1142         .sysfs_ops      = &f2fs_stat_attr_ops,
1143         .release        = f2fs_stat_kobj_release,
1144 };
1145
1146 static ssize_t f2fs_sb_feat_attr_show(struct kobject *kobj,
1147                                 struct attribute *attr, char *buf)
1148 {
1149         struct f2fs_sb_info *sbi = container_of(kobj, struct f2fs_sb_info,
1150                                                         s_feature_list_kobj);
1151         struct f2fs_attr *a = container_of(attr, struct f2fs_attr, attr);
1152
1153         return a->show ? a->show(a, sbi, buf) : 0;
1154 }
1155
1156 static void f2fs_feature_list_kobj_release(struct kobject *kobj)
1157 {
1158         struct f2fs_sb_info *sbi = container_of(kobj, struct f2fs_sb_info,
1159                                                         s_feature_list_kobj);
1160         complete(&sbi->s_feature_list_kobj_unregister);
1161 }
1162
1163 static const struct sysfs_ops f2fs_feature_list_attr_ops = {
1164         .show   = f2fs_sb_feat_attr_show,
1165 };
1166
1167 static struct kobj_type f2fs_feature_list_ktype = {
1168         .default_groups = f2fs_sb_feat_groups,
1169         .sysfs_ops      = &f2fs_feature_list_attr_ops,
1170         .release        = f2fs_feature_list_kobj_release,
1171 };
1172
1173 static int __maybe_unused segment_info_seq_show(struct seq_file *seq,
1174                                                 void *offset)
1175 {
1176         struct super_block *sb = seq->private;
1177         struct f2fs_sb_info *sbi = F2FS_SB(sb);
1178         unsigned int total_segs =
1179                         le32_to_cpu(sbi->raw_super->segment_count_main);
1180         int i;
1181
1182         seq_puts(seq, "format: segment_type|valid_blocks\n"
1183                 "segment_type(0:HD, 1:WD, 2:CD, 3:HN, 4:WN, 5:CN)\n");
1184
1185         for (i = 0; i < total_segs; i++) {
1186                 struct seg_entry *se = get_seg_entry(sbi, i);
1187
1188                 if ((i % 10) == 0)
1189                         seq_printf(seq, "%-10d", i);
1190                 seq_printf(seq, "%d|%-3u", se->type, se->valid_blocks);
1191                 if ((i % 10) == 9 || i == (total_segs - 1))
1192                         seq_putc(seq, '\n');
1193                 else
1194                         seq_putc(seq, ' ');
1195         }
1196
1197         return 0;
1198 }
1199
1200 static int __maybe_unused segment_bits_seq_show(struct seq_file *seq,
1201                                                 void *offset)
1202 {
1203         struct super_block *sb = seq->private;
1204         struct f2fs_sb_info *sbi = F2FS_SB(sb);
1205         unsigned int total_segs =
1206                         le32_to_cpu(sbi->raw_super->segment_count_main);
1207         int i, j;
1208
1209         seq_puts(seq, "format: segment_type|valid_blocks|bitmaps\n"
1210                 "segment_type(0:HD, 1:WD, 2:CD, 3:HN, 4:WN, 5:CN)\n");
1211
1212         for (i = 0; i < total_segs; i++) {
1213                 struct seg_entry *se = get_seg_entry(sbi, i);
1214
1215                 seq_printf(seq, "%-10d", i);
1216                 seq_printf(seq, "%d|%-3u|", se->type, se->valid_blocks);
1217                 for (j = 0; j < SIT_VBLOCK_MAP_SIZE; j++)
1218                         seq_printf(seq, " %.2x", se->cur_valid_map[j]);
1219                 seq_putc(seq, '\n');
1220         }
1221         return 0;
1222 }
1223
1224 static int __maybe_unused victim_bits_seq_show(struct seq_file *seq,
1225                                                 void *offset)
1226 {
1227         struct super_block *sb = seq->private;
1228         struct f2fs_sb_info *sbi = F2FS_SB(sb);
1229         struct dirty_seglist_info *dirty_i = DIRTY_I(sbi);
1230         int i;
1231
1232         seq_puts(seq, "format: victim_secmap bitmaps\n");
1233
1234         for (i = 0; i < MAIN_SECS(sbi); i++) {
1235                 if ((i % 10) == 0)
1236                         seq_printf(seq, "%-10d", i);
1237                 seq_printf(seq, "%d", test_bit(i, dirty_i->victim_secmap) ? 1 : 0);
1238                 if ((i % 10) == 9 || i == (MAIN_SECS(sbi) - 1))
1239                         seq_putc(seq, '\n');
1240                 else
1241                         seq_putc(seq, ' ');
1242         }
1243         return 0;
1244 }
1245
1246 int __init f2fs_init_sysfs(void)
1247 {
1248         int ret;
1249
1250         kobject_set_name(&f2fs_kset.kobj, "f2fs");
1251         f2fs_kset.kobj.parent = fs_kobj;
1252         ret = kset_register(&f2fs_kset);
1253         if (ret)
1254                 return ret;
1255
1256         ret = kobject_init_and_add(&f2fs_feat, &f2fs_feat_ktype,
1257                                    NULL, "features");
1258         if (ret) {
1259                 kobject_put(&f2fs_feat);
1260                 kset_unregister(&f2fs_kset);
1261         } else {
1262                 f2fs_proc_root = proc_mkdir("fs/f2fs", NULL);
1263         }
1264         return ret;
1265 }
1266
1267 void f2fs_exit_sysfs(void)
1268 {
1269         kobject_put(&f2fs_feat);
1270         kset_unregister(&f2fs_kset);
1271         remove_proc_entry("fs/f2fs", NULL);
1272         f2fs_proc_root = NULL;
1273 }
1274
1275 int f2fs_register_sysfs(struct f2fs_sb_info *sbi)
1276 {
1277         struct super_block *sb = sbi->sb;
1278         int err;
1279
1280         sbi->s_kobj.kset = &f2fs_kset;
1281         init_completion(&sbi->s_kobj_unregister);
1282         err = kobject_init_and_add(&sbi->s_kobj, &f2fs_sb_ktype, NULL,
1283                                 "%s", sb->s_id);
1284         if (err)
1285                 goto put_sb_kobj;
1286
1287         sbi->s_stat_kobj.kset = &f2fs_kset;
1288         init_completion(&sbi->s_stat_kobj_unregister);
1289         err = kobject_init_and_add(&sbi->s_stat_kobj, &f2fs_stat_ktype,
1290                                                 &sbi->s_kobj, "stat");
1291         if (err)
1292                 goto put_stat_kobj;
1293
1294         sbi->s_feature_list_kobj.kset = &f2fs_kset;
1295         init_completion(&sbi->s_feature_list_kobj_unregister);
1296         err = kobject_init_and_add(&sbi->s_feature_list_kobj,
1297                                         &f2fs_feature_list_ktype,
1298                                         &sbi->s_kobj, "feature_list");
1299         if (err)
1300                 goto put_feature_list_kobj;
1301
1302         if (f2fs_proc_root)
1303                 sbi->s_proc = proc_mkdir(sb->s_id, f2fs_proc_root);
1304
1305         if (sbi->s_proc) {
1306                 proc_create_single_data("segment_info", 0444, sbi->s_proc,
1307                                 segment_info_seq_show, sb);
1308                 proc_create_single_data("segment_bits", 0444, sbi->s_proc,
1309                                 segment_bits_seq_show, sb);
1310 #ifdef CONFIG_F2FS_IOSTAT
1311                 proc_create_single_data("iostat_info", 0444, sbi->s_proc,
1312                                 iostat_info_seq_show, sb);
1313 #endif
1314                 proc_create_single_data("victim_bits", 0444, sbi->s_proc,
1315                                 victim_bits_seq_show, sb);
1316         }
1317         return 0;
1318 put_feature_list_kobj:
1319         kobject_put(&sbi->s_feature_list_kobj);
1320         wait_for_completion(&sbi->s_feature_list_kobj_unregister);
1321 put_stat_kobj:
1322         kobject_put(&sbi->s_stat_kobj);
1323         wait_for_completion(&sbi->s_stat_kobj_unregister);
1324 put_sb_kobj:
1325         kobject_put(&sbi->s_kobj);
1326         wait_for_completion(&sbi->s_kobj_unregister);
1327         return err;
1328 }
1329
1330 void f2fs_unregister_sysfs(struct f2fs_sb_info *sbi)
1331 {
1332         if (sbi->s_proc) {
1333 #ifdef CONFIG_F2FS_IOSTAT
1334                 remove_proc_entry("iostat_info", sbi->s_proc);
1335 #endif
1336                 remove_proc_entry("segment_info", sbi->s_proc);
1337                 remove_proc_entry("segment_bits", sbi->s_proc);
1338                 remove_proc_entry("victim_bits", sbi->s_proc);
1339                 remove_proc_entry(sbi->sb->s_id, f2fs_proc_root);
1340         }
1341
1342         kobject_del(&sbi->s_stat_kobj);
1343         kobject_put(&sbi->s_stat_kobj);
1344         wait_for_completion(&sbi->s_stat_kobj_unregister);
1345         kobject_del(&sbi->s_feature_list_kobj);
1346         kobject_put(&sbi->s_feature_list_kobj);
1347         wait_for_completion(&sbi->s_feature_list_kobj_unregister);
1348
1349         kobject_del(&sbi->s_kobj);
1350         kobject_put(&sbi->s_kobj);
1351         wait_for_completion(&sbi->s_kobj_unregister);
1352 }