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 class = IOPRIO_PRIO_CLASS(cprc->ckpt_thread_ioprio);
 316                 int data = IOPRIO_PRIO_DATA(cprc->ckpt_thread_ioprio);
 317
 318                 if (class != IOPRIO_CLASS_RT && class != IOPRIO_CLASS_BE)
 319                         return -EINVAL;
 320
 321                 return sysfs_emit(buf, "%s,%d\n",
 322                         class == IOPRIO_CLASS_RT ? "rt" : "be", data);
 323         }
 324
 325 #ifdef CONFIG_F2FS_FS_COMPRESSION
 326         if (!strcmp(a->attr.name, "compr_written_block"))
 327                 return sysfs_emit(buf, "%llu\n", sbi->compr_written_block);
 328
 329         if (!strcmp(a->attr.name, "compr_saved_block"))
 330                 return sysfs_emit(buf, "%llu\n", sbi->compr_saved_block);
 331
 332         if (!strcmp(a->attr.name, "compr_new_inode"))
 333                 return sysfs_emit(buf, "%u\n", sbi->compr_new_inode);
 334 #endif
 335
 336         if (!strcmp(a->attr.name, "gc_segment_mode"))
 337                 return sysfs_emit(buf, "%u\n", sbi->gc_segment_mode);
 338
 339         if (!strcmp(a->attr.name, "gc_reclaimed_segments")) {
 340                 return sysfs_emit(buf, "%u\n",
 341                         sbi->gc_reclaimed_segs[sbi->gc_segment_mode]);
 342         }
 343
 344         if (!strcmp(a->attr.name, "current_atomic_write")) {
 345                 s64 current_write = atomic64_read(&sbi->current_atomic_write);
 346
 347                 return sysfs_emit(buf, "%lld\n", current_write);
 348         }
 349
 350         if (!strcmp(a->attr.name, "peak_atomic_write"))
 351                 return sysfs_emit(buf, "%lld\n", sbi->peak_atomic_write);
 352
 353         if (!strcmp(a->attr.name, "committed_atomic_block"))
 354                 return sysfs_emit(buf, "%llu\n", sbi->committed_atomic_block);
 355
 356         if (!strcmp(a->attr.name, "revoked_atomic_block"))
 357                 return sysfs_emit(buf, "%llu\n", sbi->revoked_atomic_block);
 358
 359         ui = (unsigned int *)(ptr + a->offset);
 360
 361         return sysfs_emit(buf, "%u\n", *ui);
 362 }
 363
 364 static ssize_t __sbi_store(struct f2fs_attr *a,
 365                         struct f2fs_sb_info *sbi,
 366                         const char *buf, size_t count)
 367 {
 368         unsigned char *ptr;
 369         unsigned long t;
 370         unsigned int *ui;
 371         ssize_t ret;
 372
 373         ptr = __struct_ptr(sbi, a->struct_type);
 374         if (!ptr)
 375                 return -EINVAL;
 376
 377         if (!strcmp(a->attr.name, "extension_list")) {
 378                 const char *name = strim((char *)buf);
 379                 bool set = true, hot;
 380
 381                 if (!strncmp(name, "[h]", 3))
 382                         hot = true;
 383                 else if (!strncmp(name, "[c]", 3))
 384                         hot = false;
 385                 else
 386                         return -EINVAL;
 387
 388                 name += 3;
 389
 390                 if (*name == '!') {
 391                         name++;
 392                         set = false;
 393                 }
 394
 395                 if (!strlen(name) || strlen(name) >= F2FS_EXTENSION_LEN)
 396                         return -EINVAL;
 397
 398                 f2fs_down_write(&sbi->sb_lock);
 399
 400                 ret = f2fs_update_extension_list(sbi, name, hot, set);
 401                 if (ret)
 402                         goto out;
 403
 404                 ret = f2fs_commit_super(sbi, false);
 405                 if (ret)
 406                         f2fs_update_extension_list(sbi, name, hot, !set);
 407 out:
 408                 f2fs_up_write(&sbi->sb_lock);
 409                 return ret ? ret : count;
 410         }
 411
 412         if (!strcmp(a->attr.name, "ckpt_thread_ioprio")) {
 413                 const char *name = strim((char *)buf);
 414                 struct ckpt_req_control *cprc = &sbi->cprc_info;
 415                 int class;
 416                 long data;
 417                 int ret;
 418
 419                 if (!strncmp(name, "rt,", 3))
 420                         class = IOPRIO_CLASS_RT;
 421                 else if (!strncmp(name, "be,", 3))
 422                         class = IOPRIO_CLASS_BE;
 423                 else
 424                         return -EINVAL;
 425
 426                 name += 3;
 427                 ret = kstrtol(name, 10, &data);
 428                 if (ret)
 429                         return ret;
 430                 if (data >= IOPRIO_NR_LEVELS || data < 0)
 431                         return -EINVAL;
 432
 433                 cprc->ckpt_thread_ioprio = IOPRIO_PRIO_VALUE(class, data);
 434                 if (test_opt(sbi, MERGE_CHECKPOINT)) {
 435                         ret = set_task_ioprio(cprc->f2fs_issue_ckpt,
 436                                         cprc->ckpt_thread_ioprio);
 437                         if (ret)
 438                                 return ret;
 439                 }
 440
 441                 return count;
 442         }
 443
 444         ui = (unsigned int *)(ptr + a->offset);
 445
 446         ret = kstrtoul(skip_spaces(buf), 0, &t);
 447         if (ret < 0)
 448                 return ret;
 449 #ifdef CONFIG_F2FS_FAULT_INJECTION
 450         if (a->struct_type == FAULT_INFO_TYPE && t >= BIT(FAULT_MAX))
 451                 return -EINVAL;
 452         if (a->struct_type == FAULT_INFO_RATE && t >= UINT_MAX)
 453                 return -EINVAL;
 454 #endif
 455         if (a->struct_type == RESERVED_BLOCKS) {
 456                 spin_lock(&sbi->stat_lock);
 457                 if (t > (unsigned long)(sbi->user_block_count -
 458                                 F2FS_OPTION(sbi).root_reserved_blocks -
 459                                 sbi->blocks_per_seg *
 460                                 SM_I(sbi)->additional_reserved_segments)) {
 461                         spin_unlock(&sbi->stat_lock);
 462                         return -EINVAL;
 463                 }
 464                 *ui = t;
 465                 sbi->current_reserved_blocks = min(sbi->reserved_blocks,
 466                                 sbi->user_block_count - valid_user_blocks(sbi));
 467                 spin_unlock(&sbi->stat_lock);
 468                 return count;
 469         }
 470
 471         if (!strcmp(a->attr.name, "discard_io_aware_gran")) {
 472                 if (t > MAX_PLIST_NUM)
 473                         return -EINVAL;
 474                 if (!f2fs_block_unit_discard(sbi))
 475                         return -EINVAL;
 476                 if (t == *ui)
 477                         return count;
 478                 *ui = t;
 479                 return count;
 480         }
 481
 482         if (!strcmp(a->attr.name, "discard_granularity")) {
 483                 if (t == 0 || t > MAX_PLIST_NUM)
 484                         return -EINVAL;
 485                 if (!f2fs_block_unit_discard(sbi))
 486                         return -EINVAL;
 487                 if (t == *ui)
 488                         return count;
 489                 *ui = t;
 490                 return count;
 491         }
 492
 493         if (!strcmp(a->attr.name, "max_ordered_discard")) {
 494                 if (t == 0 || t > MAX_PLIST_NUM)
 495                         return -EINVAL;
 496                 if (!f2fs_block_unit_discard(sbi))
 497                         return -EINVAL;
 498                 *ui = t;
 499                 return count;
 500         }
 501
 502         if (!strcmp(a->attr.name, "discard_urgent_util")) {
 503                 if (t > 100)
 504                         return -EINVAL;
 505                 *ui = t;
 506                 return count;
 507         }
 508
 509         if (!strcmp(a->attr.name, "migration_granularity")) {
 510                 if (t == 0 || t > sbi->segs_per_sec)
 511                         return -EINVAL;
 512         }
 513
 514         if (!strcmp(a->attr.name, "gc_urgent")) {
 515                 if (t == 0) {
 516                         sbi->gc_mode = GC_NORMAL;
 517                 } else if (t == 1) {
 518                         sbi->gc_mode = GC_URGENT_HIGH;
 519                         if (sbi->gc_thread) {
 520                                 sbi->gc_thread->gc_wake = true;
 521                                 wake_up_interruptible_all(
 522                                         &sbi->gc_thread->gc_wait_queue_head);
 523                                 wake_up_discard_thread(sbi, true);
 524                         }
 525                 } else if (t == 2) {
 526                         sbi->gc_mode = GC_URGENT_LOW;
 527                 } else if (t == 3) {
 528                         sbi->gc_mode = GC_URGENT_MID;
 529                         if (sbi->gc_thread) {
 530                                 sbi->gc_thread->gc_wake = true;
 531                                 wake_up_interruptible_all(
 532                                         &sbi->gc_thread->gc_wait_queue_head);
 533                         }
 534                 } else {
 535                         return -EINVAL;
 536                 }
 537                 return count;
 538         }
 539         if (!strcmp(a->attr.name, "gc_idle")) {
 540                 if (t == GC_IDLE_CB) {
 541                         sbi->gc_mode = GC_IDLE_CB;
 542                 } else if (t == GC_IDLE_GREEDY) {
 543                         sbi->gc_mode = GC_IDLE_GREEDY;
 544                 } else if (t == GC_IDLE_AT) {
 545                         if (!sbi->am.atgc_enabled)
 546                                 return -EINVAL;
 547                         sbi->gc_mode = GC_IDLE_AT;
 548                 } else {
 549                         sbi->gc_mode = GC_NORMAL;
 550                 }
 551                 return count;
 552         }
 553
 554         if (!strcmp(a->attr.name, "gc_remaining_trials")) {
 555                 spin_lock(&sbi->gc_remaining_trials_lock);
 556                 sbi->gc_remaining_trials = t;
 557                 spin_unlock(&sbi->gc_remaining_trials_lock);
 558
 559                 return count;
 560         }
 561
 562 #ifdef CONFIG_F2FS_IOSTAT
 563         if (!strcmp(a->attr.name, "iostat_enable")) {
 564                 sbi->iostat_enable = !!t;
 565                 if (!sbi->iostat_enable)
 566                         f2fs_reset_iostat(sbi);
 567                 return count;
 568         }
 569
 570         if (!strcmp(a->attr.name, "iostat_period_ms")) {
 571                 if (t < MIN_IOSTAT_PERIOD_MS || t > MAX_IOSTAT_PERIOD_MS)
 572                         return -EINVAL;
 573                 spin_lock_irq(&sbi->iostat_lock);
 574                 sbi->iostat_period_ms = (unsigned int)t;
 575                 spin_unlock_irq(&sbi->iostat_lock);
 576                 return count;
 577         }
 578 #endif
 579
 580 #ifdef CONFIG_F2FS_FS_COMPRESSION
 581         if (!strcmp(a->attr.name, "compr_written_block") ||
 582                 !strcmp(a->attr.name, "compr_saved_block")) {
 583                 if (t != 0)
 584                         return -EINVAL;
 585                 sbi->compr_written_block = 0;
 586                 sbi->compr_saved_block = 0;
 587                 return count;
 588         }
 589
 590         if (!strcmp(a->attr.name, "compr_new_inode")) {
 591                 if (t != 0)
 592                         return -EINVAL;
 593                 sbi->compr_new_inode = 0;
 594                 return count;
 595         }
 596
 597         if (!strcmp(a->attr.name, "compress_percent")) {
 598                 if (t == 0 || t > 100)
 599                         return -EINVAL;
 600                 *ui = t;
 601                 return count;
 602         }
 603
 604         if (!strcmp(a->attr.name, "compress_watermark")) {
 605                 if (t == 0 || t > 100)
 606                         return -EINVAL;
 607                 *ui = t;
 608                 return count;
 609         }
 610 #endif
 611
 612         if (!strcmp(a->attr.name, "atgc_candidate_ratio")) {
 613                 if (t > 100)
 614                         return -EINVAL;
 615                 sbi->am.candidate_ratio = t;
 616                 return count;
 617         }
 618
 619         if (!strcmp(a->attr.name, "atgc_age_weight")) {
 620                 if (t > 100)
 621                         return -EINVAL;
 622                 sbi->am.age_weight = t;
 623                 return count;
 624         }
 625
 626         if (!strcmp(a->attr.name, "gc_segment_mode")) {
 627                 if (t < MAX_GC_MODE)
 628                         sbi->gc_segment_mode = t;
 629                 else
 630                         return -EINVAL;
 631                 return count;
 632         }
 633
 634         if (!strcmp(a->attr.name, "gc_reclaimed_segments")) {
 635                 if (t != 0)
 636                         return -EINVAL;
 637                 sbi->gc_reclaimed_segs[sbi->gc_segment_mode] = 0;
 638                 return count;
 639         }
 640
 641         if (!strcmp(a->attr.name, "seq_file_ra_mul")) {
 642                 if (t >= MIN_RA_MUL && t <= MAX_RA_MUL)
 643                         sbi->seq_file_ra_mul = t;
 644                 else
 645                         return -EINVAL;
 646                 return count;
 647         }
 648
 649         if (!strcmp(a->attr.name, "max_fragment_chunk")) {
 650                 if (t >= MIN_FRAGMENT_SIZE && t <= MAX_FRAGMENT_SIZE)
 651                         sbi->max_fragment_chunk = t;
 652                 else
 653                         return -EINVAL;
 654                 return count;
 655         }
 656
 657         if (!strcmp(a->attr.name, "max_fragment_hole")) {
 658                 if (t >= MIN_FRAGMENT_SIZE && t <= MAX_FRAGMENT_SIZE)
 659                         sbi->max_fragment_hole = t;
 660                 else
 661                         return -EINVAL;
 662                 return count;
 663         }
 664
 665         if (!strcmp(a->attr.name, "peak_atomic_write")) {
 666                 if (t != 0)
 667                         return -EINVAL;
 668                 sbi->peak_atomic_write = 0;
 669                 return count;
 670         }
 671
 672         if (!strcmp(a->attr.name, "committed_atomic_block")) {
 673                 if (t != 0)
 674                         return -EINVAL;
 675                 sbi->committed_atomic_block = 0;
 676                 return count;
 677         }
 678
 679         if (!strcmp(a->attr.name, "revoked_atomic_block")) {
 680                 if (t != 0)
 681                         return -EINVAL;
 682                 sbi->revoked_atomic_block = 0;
 683                 return count;
 684         }
 685
 686         if (!strcmp(a->attr.name, "readdir_ra")) {
 687                 sbi->readdir_ra = !!t;
 688                 return count;
 689         }
 690
 691         if (!strcmp(a->attr.name, "hot_data_age_threshold")) {
 692                 if (t == 0 || t >= sbi->warm_data_age_threshold)
 693                         return -EINVAL;
 694                 if (t == *ui)
 695                         return count;
 696                 *ui = (unsigned int)t;
 697                 return count;
 698         }
 699
 700         if (!strcmp(a->attr.name, "warm_data_age_threshold")) {
 701                 if (t <= sbi->hot_data_age_threshold)
 702                         return -EINVAL;
 703                 if (t == *ui)
 704                         return count;
 705                 *ui = (unsigned int)t;
 706                 return count;
 707         }
 708
 709         if (!strcmp(a->attr.name, "last_age_weight")) {
 710                 if (t > 100)
 711                         return -EINVAL;
 712                 if (t == *ui)
 713                         return count;
 714                 *ui = (unsigned int)t;
 715                 return count;
 716         }
 717
 718         if (!strcmp(a->attr.name, "ipu_policy")) {
 719                 if (t >= BIT(F2FS_IPU_MAX))
 720                         return -EINVAL;
 721                 if (t && f2fs_lfs_mode(sbi))
 722                         return -EINVAL;
 723                 SM_I(sbi)->ipu_policy = (unsigned int)t;
 724                 return count;
 725         }
 726
 727         *ui = (unsigned int)t;
 728
 729         return count;
 730 }
 731
 732 static ssize_t f2fs_sbi_store(struct f2fs_attr *a,
 733                         struct f2fs_sb_info *sbi,
 734                         const char *buf, size_t count)
 735 {
 736         ssize_t ret;
 737         bool gc_entry = (!strcmp(a->attr.name, "gc_urgent") ||
 738                                         a->struct_type == GC_THREAD);
 739
 740         if (gc_entry) {
 741                 if (!down_read_trylock(&sbi->sb->s_umount))
 742                         return -EAGAIN;
 743         }
 744         ret = __sbi_store(a, sbi, buf, count);
 745         if (gc_entry)
 746                 up_read(&sbi->sb->s_umount);
 747
 748         return ret;
 749 }
 750
 751 static ssize_t f2fs_attr_show(struct kobject *kobj,
 752                                 struct attribute *attr, char *buf)
 753 {
 754         struct f2fs_sb_info *sbi = container_of(kobj, struct f2fs_sb_info,
 755                                                                 s_kobj);
 756         struct f2fs_attr *a = container_of(attr, struct f2fs_attr, attr);
 757
 758         return a->show ? a->show(a, sbi, buf) : 0;
 759 }
 760
 761 static ssize_t f2fs_attr_store(struct kobject *kobj, struct attribute *attr,
 762                                                 const char *buf, size_t len)
 763 {
 764         struct f2fs_sb_info *sbi = container_of(kobj, struct f2fs_sb_info,
 765                                                                         s_kobj);
 766         struct f2fs_attr *a = container_of(attr, struct f2fs_attr, attr);
 767
 768         return a->store ? a->store(a, sbi, buf, len) : 0;
 769 }
 770
 771 static void f2fs_sb_release(struct kobject *kobj)
 772 {
 773         struct f2fs_sb_info *sbi = container_of(kobj, struct f2fs_sb_info,
 774                                                                 s_kobj);
 775         complete(&sbi->s_kobj_unregister);
 776 }
 777
 778 /*
 779  * Note that there are three feature list entries:
 780  * 1) /sys/fs/f2fs/features
 781  *   : shows runtime features supported by in-kernel f2fs along with Kconfig.
 782  *     - ref. F2FS_FEATURE_RO_ATTR()
 783  *
 784  * 2) /sys/fs/f2fs/$s_id/features <deprecated>
 785  *   : shows on-disk features enabled by mkfs.f2fs, used for old kernels. This
 786  *     won't add new feature anymore, and thus, users should check entries in 3)
 787  *     instead of this 2).
 788  *
 789  * 3) /sys/fs/f2fs/$s_id/feature_list
 790  *   : shows on-disk features enabled by mkfs.f2fs per instance, which follows
 791  *     sysfs entry rule where each entry should expose single value.
 792  *     This list covers old feature list provided by 2) and beyond. Therefore,
 793  *     please add new on-disk feature in this list only.
 794  *     - ref. F2FS_SB_FEATURE_RO_ATTR()
 795  */
 796 static ssize_t f2fs_feature_show(struct f2fs_attr *a,
 797                 struct f2fs_sb_info *sbi, char *buf)
 798 {
 799         return sysfs_emit(buf, "supported\n");
 800 }
 801
 802 #define F2FS_FEATURE_RO_ATTR(_name)                             \
 803 static struct f2fs_attr f2fs_attr_##_name = {                   \
 804         .attr = {.name = __stringify(_name), .mode = 0444 },    \
 805         .show   = f2fs_feature_show,                            \
 806 }
 807
 808 static ssize_t f2fs_sb_feature_show(struct f2fs_attr *a,
 809                 struct f2fs_sb_info *sbi, char *buf)
 810 {
 811         if (F2FS_HAS_FEATURE(sbi, a->id))
 812                 return sysfs_emit(buf, "supported\n");
 813         return sysfs_emit(buf, "unsupported\n");
 814 }
 815
 816 #define F2FS_SB_FEATURE_RO_ATTR(_name, _feat)                   \
 817 static struct f2fs_attr f2fs_attr_sb_##_name = {                \
 818         .attr = {.name = __stringify(_name), .mode = 0444 },    \
 819         .show   = f2fs_sb_feature_show,                         \
 820         .id     = F2FS_FEATURE_##_feat,                         \
 821 }
 822
 823 #define F2FS_ATTR_OFFSET(_struct_type, _name, _mode, _show, _store, _offset) \
 824 static struct f2fs_attr f2fs_attr_##_name = {                   \
 825         .attr = {.name = __stringify(_name), .mode = _mode },   \
 826         .show   = _show,                                        \
 827         .store  = _store,                                       \
 828         .struct_type = _struct_type,                            \
 829         .offset = _offset                                       \
 830 }
 831
 832 #define F2FS_RO_ATTR(struct_type, struct_name, name, elname)    \
 833         F2FS_ATTR_OFFSET(struct_type, name, 0444,               \
 834                 f2fs_sbi_show, NULL,                            \
 835                 offsetof(struct struct_name, elname))
 836
 837 #define F2FS_RW_ATTR(struct_type, struct_name, name, elname)    \
 838         F2FS_ATTR_OFFSET(struct_type, name, 0644,               \
 839                 f2fs_sbi_show, f2fs_sbi_store,                  \
 840                 offsetof(struct struct_name, elname))
 841
 842 #define F2FS_GENERAL_RO_ATTR(name) \
 843 static struct f2fs_attr f2fs_attr_##name = __ATTR(name, 0444, name##_show, NULL)
 844
 845 #define F2FS_STAT_ATTR(_struct_type, _struct_name, _name, _elname)      \
 846 static struct f2fs_attr f2fs_attr_##_name = {                   \
 847         .attr = {.name = __stringify(_name), .mode = 0444 },    \
 848         .show = f2fs_sbi_show,                                  \
 849         .struct_type = _struct_type,                            \
 850         .offset = offsetof(struct _struct_name, _elname),       \
 851 }
 852
 853 F2FS_RW_ATTR(GC_THREAD, f2fs_gc_kthread, gc_urgent_sleep_time,
 854                                                         urgent_sleep_time);
 855 F2FS_RW_ATTR(GC_THREAD, f2fs_gc_kthread, gc_min_sleep_time, min_sleep_time);
 856 F2FS_RW_ATTR(GC_THREAD, f2fs_gc_kthread, gc_max_sleep_time, max_sleep_time);
 857 F2FS_RW_ATTR(GC_THREAD, f2fs_gc_kthread, gc_no_gc_sleep_time, no_gc_sleep_time);
 858 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, gc_idle, gc_mode);
 859 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, gc_urgent, gc_mode);
 860 F2FS_RW_ATTR(SM_INFO, f2fs_sm_info, reclaim_segments, rec_prefree_segments);
 861 F2FS_RW_ATTR(DCC_INFO, discard_cmd_control, max_small_discards, max_discards);
 862 F2FS_RW_ATTR(DCC_INFO, discard_cmd_control, max_discard_request, max_discard_request);
 863 F2FS_RW_ATTR(DCC_INFO, discard_cmd_control, min_discard_issue_time, min_discard_issue_time);
 864 F2FS_RW_ATTR(DCC_INFO, discard_cmd_control, mid_discard_issue_time, mid_discard_issue_time);
 865 F2FS_RW_ATTR(DCC_INFO, discard_cmd_control, max_discard_issue_time, max_discard_issue_time);
 866 F2FS_RW_ATTR(DCC_INFO, discard_cmd_control, discard_io_aware_gran, discard_io_aware_gran);
 867 F2FS_RW_ATTR(DCC_INFO, discard_cmd_control, discard_urgent_util, discard_urgent_util);
 868 F2FS_RW_ATTR(DCC_INFO, discard_cmd_control, discard_granularity, discard_granularity);
 869 F2FS_RW_ATTR(DCC_INFO, discard_cmd_control, max_ordered_discard, max_ordered_discard);
 870 F2FS_RW_ATTR(RESERVED_BLOCKS, f2fs_sb_info, reserved_blocks, reserved_blocks);
 871 F2FS_RW_ATTR(SM_INFO, f2fs_sm_info, ipu_policy, ipu_policy);
 872 F2FS_RW_ATTR(SM_INFO, f2fs_sm_info, min_ipu_util, min_ipu_util);
 873 F2FS_RW_ATTR(SM_INFO, f2fs_sm_info, min_fsync_blocks, min_fsync_blocks);
 874 F2FS_RW_ATTR(SM_INFO, f2fs_sm_info, min_seq_blocks, min_seq_blocks);
 875 F2FS_RW_ATTR(SM_INFO, f2fs_sm_info, min_hot_blocks, min_hot_blocks);
 876 F2FS_RW_ATTR(SM_INFO, f2fs_sm_info, min_ssr_sections, min_ssr_sections);
 877 F2FS_RW_ATTR(NM_INFO, f2fs_nm_info, ram_thresh, ram_thresh);
 878 F2FS_RW_ATTR(NM_INFO, f2fs_nm_info, ra_nid_pages, ra_nid_pages);
 879 F2FS_RW_ATTR(NM_INFO, f2fs_nm_info, dirty_nats_ratio, dirty_nats_ratio);
 880 F2FS_RW_ATTR(NM_INFO, f2fs_nm_info, max_roll_forward_node_blocks, max_rf_node_blocks);
 881 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, max_victim_search, max_victim_search);
 882 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, migration_granularity, migration_granularity);
 883 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, dir_level, dir_level);
 884 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, cp_interval, interval_time[CP_TIME]);
 885 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, idle_interval, interval_time[REQ_TIME]);
 886 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, discard_idle_interval,
 887                                         interval_time[DISCARD_TIME]);
 888 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, gc_idle_interval, interval_time[GC_TIME]);
 889 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info,
 890                 umount_discard_timeout, interval_time[UMOUNT_DISCARD_TIMEOUT]);
 891 #ifdef CONFIG_F2FS_IOSTAT
 892 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, iostat_enable, iostat_enable);
 893 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, iostat_period_ms, iostat_period_ms);
 894 #endif
 895 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, readdir_ra, readdir_ra);
 896 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, max_io_bytes, max_io_bytes);
 897 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, gc_pin_file_thresh, gc_pin_file_threshold);
 898 F2FS_RW_ATTR(F2FS_SBI, f2fs_super_block, extension_list, extension_list);
 899 #ifdef CONFIG_F2FS_FAULT_INJECTION
 900 F2FS_RW_ATTR(FAULT_INFO_RATE, f2fs_fault_info, inject_rate, inject_rate);
 901 F2FS_RW_ATTR(FAULT_INFO_TYPE, f2fs_fault_info, inject_type, inject_type);
 902 #endif
 903 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, data_io_flag, data_io_flag);
 904 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, node_io_flag, node_io_flag);
 905 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, gc_remaining_trials, gc_remaining_trials);
 906 F2FS_RW_ATTR(CPRC_INFO, ckpt_req_control, ckpt_thread_ioprio, ckpt_thread_ioprio);
 907 F2FS_GENERAL_RO_ATTR(dirty_segments);
 908 F2FS_GENERAL_RO_ATTR(free_segments);
 909 F2FS_GENERAL_RO_ATTR(ovp_segments);
 910 F2FS_GENERAL_RO_ATTR(lifetime_write_kbytes);
 911 F2FS_GENERAL_RO_ATTR(features);
 912 F2FS_GENERAL_RO_ATTR(current_reserved_blocks);
 913 F2FS_GENERAL_RO_ATTR(unusable);
 914 F2FS_GENERAL_RO_ATTR(encoding);
 915 F2FS_GENERAL_RO_ATTR(mounted_time_sec);
 916 F2FS_GENERAL_RO_ATTR(main_blkaddr);
 917 F2FS_GENERAL_RO_ATTR(pending_discard);
 918 F2FS_GENERAL_RO_ATTR(gc_mode);
 919 #ifdef CONFIG_F2FS_STAT_FS
 920 F2FS_STAT_ATTR(STAT_INFO, f2fs_stat_info, cp_foreground_calls, cp_count);
 921 F2FS_STAT_ATTR(STAT_INFO, f2fs_stat_info, cp_background_calls, bg_cp_count);
 922 F2FS_STAT_ATTR(STAT_INFO, f2fs_stat_info, gc_foreground_calls, call_count);
 923 F2FS_STAT_ATTR(STAT_INFO, f2fs_stat_info, gc_background_calls, bg_gc);
 924 F2FS_GENERAL_RO_ATTR(moved_blocks_background);
 925 F2FS_GENERAL_RO_ATTR(moved_blocks_foreground);
 926 F2FS_GENERAL_RO_ATTR(avg_vblocks);
 927 #endif
 928
 929 #ifdef CONFIG_FS_ENCRYPTION
 930 F2FS_FEATURE_RO_ATTR(encryption);
 931 F2FS_FEATURE_RO_ATTR(test_dummy_encryption_v2);
 932 #if IS_ENABLED(CONFIG_UNICODE)
 933 F2FS_FEATURE_RO_ATTR(encrypted_casefold);
 934 #endif
 935 #endif /* CONFIG_FS_ENCRYPTION */
 936 #ifdef CONFIG_BLK_DEV_ZONED
 937 F2FS_FEATURE_RO_ATTR(block_zoned);
 938 F2FS_RO_ATTR(F2FS_SBI, f2fs_sb_info, unusable_blocks_per_sec,
 939                                         unusable_blocks_per_sec);
 940 #endif
 941 F2FS_FEATURE_RO_ATTR(atomic_write);
 942 F2FS_FEATURE_RO_ATTR(extra_attr);
 943 F2FS_FEATURE_RO_ATTR(project_quota);
 944 F2FS_FEATURE_RO_ATTR(inode_checksum);
 945 F2FS_FEATURE_RO_ATTR(flexible_inline_xattr);
 946 F2FS_FEATURE_RO_ATTR(quota_ino);
 947 F2FS_FEATURE_RO_ATTR(inode_crtime);
 948 F2FS_FEATURE_RO_ATTR(lost_found);
 949 #ifdef CONFIG_FS_VERITY
 950 F2FS_FEATURE_RO_ATTR(verity);
 951 #endif
 952 F2FS_FEATURE_RO_ATTR(sb_checksum);
 953 #if IS_ENABLED(CONFIG_UNICODE)
 954 F2FS_FEATURE_RO_ATTR(casefold);
 955 #endif
 956 F2FS_FEATURE_RO_ATTR(readonly);
 957 #ifdef CONFIG_F2FS_FS_COMPRESSION
 958 F2FS_FEATURE_RO_ATTR(compression);
 959 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, compr_written_block, compr_written_block);
 960 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, compr_saved_block, compr_saved_block);
 961 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, compr_new_inode, compr_new_inode);
 962 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, compress_percent, compress_percent);
 963 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, compress_watermark, compress_watermark);
 964 #endif
 965 F2FS_FEATURE_RO_ATTR(pin_file);
 966
 967 /* For ATGC */
 968 F2FS_RW_ATTR(ATGC_INFO, atgc_management, atgc_candidate_ratio, candidate_ratio);
 969 F2FS_RW_ATTR(ATGC_INFO, atgc_management, atgc_candidate_count, max_candidate_count);
 970 F2FS_RW_ATTR(ATGC_INFO, atgc_management, atgc_age_weight, age_weight);
 971 F2FS_RW_ATTR(ATGC_INFO, atgc_management, atgc_age_threshold, age_threshold);
 972
 973 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, seq_file_ra_mul, seq_file_ra_mul);
 974 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, gc_segment_mode, gc_segment_mode);
 975 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, gc_reclaimed_segments, gc_reclaimed_segs);
 976 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, max_fragment_chunk, max_fragment_chunk);
 977 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, max_fragment_hole, max_fragment_hole);
 978
 979 /* For atomic write */
 980 F2FS_RO_ATTR(F2FS_SBI, f2fs_sb_info, current_atomic_write, current_atomic_write);
 981 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, peak_atomic_write, peak_atomic_write);
 982 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, committed_atomic_block, committed_atomic_block);
 983 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, revoked_atomic_block, revoked_atomic_block);
 984
 985 /* For block age extent cache */
 986 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, hot_data_age_threshold, hot_data_age_threshold);
 987 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, warm_data_age_threshold, warm_data_age_threshold);
 988 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, last_age_weight, last_age_weight);
 989
 990 #define ATTR_LIST(name) (&f2fs_attr_##name.attr)
 991 static struct attribute *f2fs_attrs[] = {
 992         ATTR_LIST(gc_urgent_sleep_time),
 993         ATTR_LIST(gc_min_sleep_time),
 994         ATTR_LIST(gc_max_sleep_time),
 995         ATTR_LIST(gc_no_gc_sleep_time),
 996         ATTR_LIST(gc_idle),
 997         ATTR_LIST(gc_urgent),
 998         ATTR_LIST(reclaim_segments),
 999         ATTR_LIST(main_blkaddr),
1000         ATTR_LIST(max_small_discards),
1001         ATTR_LIST(max_discard_request),
1002         ATTR_LIST(min_discard_issue_time),
1003         ATTR_LIST(mid_discard_issue_time),
1004         ATTR_LIST(max_discard_issue_time),
1005         ATTR_LIST(discard_io_aware_gran),
1006         ATTR_LIST(discard_urgent_util),
1007         ATTR_LIST(discard_granularity),
1008         ATTR_LIST(max_ordered_discard),
1009         ATTR_LIST(pending_discard),
1010         ATTR_LIST(gc_mode),
1011         ATTR_LIST(ipu_policy),
1012         ATTR_LIST(min_ipu_util),
1013         ATTR_LIST(min_fsync_blocks),
1014         ATTR_LIST(min_seq_blocks),
1015         ATTR_LIST(min_hot_blocks),
1016         ATTR_LIST(min_ssr_sections),
1017         ATTR_LIST(max_victim_search),
1018         ATTR_LIST(migration_granularity),
1019         ATTR_LIST(dir_level),
1020         ATTR_LIST(ram_thresh),
1021         ATTR_LIST(ra_nid_pages),
1022         ATTR_LIST(dirty_nats_ratio),
1023         ATTR_LIST(max_roll_forward_node_blocks),
1024         ATTR_LIST(cp_interval),
1025         ATTR_LIST(idle_interval),
1026         ATTR_LIST(discard_idle_interval),
1027         ATTR_LIST(gc_idle_interval),
1028         ATTR_LIST(umount_discard_timeout),
1029 #ifdef CONFIG_F2FS_IOSTAT
1030         ATTR_LIST(iostat_enable),
1031         ATTR_LIST(iostat_period_ms),
1032 #endif
1033         ATTR_LIST(readdir_ra),
1034         ATTR_LIST(max_io_bytes),
1035         ATTR_LIST(gc_pin_file_thresh),
1036         ATTR_LIST(extension_list),
1037 #ifdef CONFIG_F2FS_FAULT_INJECTION
1038         ATTR_LIST(inject_rate),
1039         ATTR_LIST(inject_type),
1040 #endif
1041         ATTR_LIST(data_io_flag),
1042         ATTR_LIST(node_io_flag),
1043         ATTR_LIST(gc_remaining_trials),
1044         ATTR_LIST(ckpt_thread_ioprio),
1045         ATTR_LIST(dirty_segments),
1046         ATTR_LIST(free_segments),
1047         ATTR_LIST(ovp_segments),
1048         ATTR_LIST(unusable),
1049         ATTR_LIST(lifetime_write_kbytes),
1050         ATTR_LIST(features),
1051         ATTR_LIST(reserved_blocks),
1052         ATTR_LIST(current_reserved_blocks),
1053         ATTR_LIST(encoding),
1054         ATTR_LIST(mounted_time_sec),
1055 #ifdef CONFIG_F2FS_STAT_FS
1056         ATTR_LIST(cp_foreground_calls),
1057         ATTR_LIST(cp_background_calls),
1058         ATTR_LIST(gc_foreground_calls),
1059         ATTR_LIST(gc_background_calls),
1060         ATTR_LIST(moved_blocks_foreground),
1061         ATTR_LIST(moved_blocks_background),
1062         ATTR_LIST(avg_vblocks),
1063 #endif
1064 #ifdef CONFIG_BLK_DEV_ZONED
1065         ATTR_LIST(unusable_blocks_per_sec),
1066 #endif
1067 #ifdef CONFIG_F2FS_FS_COMPRESSION
1068         ATTR_LIST(compr_written_block),
1069         ATTR_LIST(compr_saved_block),
1070         ATTR_LIST(compr_new_inode),
1071         ATTR_LIST(compress_percent),
1072         ATTR_LIST(compress_watermark),
1073 #endif
1074         /* For ATGC */
1075         ATTR_LIST(atgc_candidate_ratio),
1076         ATTR_LIST(atgc_candidate_count),
1077         ATTR_LIST(atgc_age_weight),
1078         ATTR_LIST(atgc_age_threshold),
1079         ATTR_LIST(seq_file_ra_mul),
1080         ATTR_LIST(gc_segment_mode),
1081         ATTR_LIST(gc_reclaimed_segments),
1082         ATTR_LIST(max_fragment_chunk),
1083         ATTR_LIST(max_fragment_hole),
1084         ATTR_LIST(current_atomic_write),
1085         ATTR_LIST(peak_atomic_write),
1086         ATTR_LIST(committed_atomic_block),
1087         ATTR_LIST(revoked_atomic_block),
1088         ATTR_LIST(hot_data_age_threshold),
1089         ATTR_LIST(warm_data_age_threshold),
1090         ATTR_LIST(last_age_weight),
1091         NULL,
1092 };
1093 ATTRIBUTE_GROUPS(f2fs);
1094
1095 static struct attribute *f2fs_feat_attrs[] = {
1096 #ifdef CONFIG_FS_ENCRYPTION
1097         ATTR_LIST(encryption),
1098         ATTR_LIST(test_dummy_encryption_v2),
1099 #if IS_ENABLED(CONFIG_UNICODE)
1100         ATTR_LIST(encrypted_casefold),
1101 #endif
1102 #endif /* CONFIG_FS_ENCRYPTION */
1103 #ifdef CONFIG_BLK_DEV_ZONED
1104         ATTR_LIST(block_zoned),
1105 #endif
1106         ATTR_LIST(atomic_write),
1107         ATTR_LIST(extra_attr),
1108         ATTR_LIST(project_quota),
1109         ATTR_LIST(inode_checksum),
1110         ATTR_LIST(flexible_inline_xattr),
1111         ATTR_LIST(quota_ino),
1112         ATTR_LIST(inode_crtime),
1113         ATTR_LIST(lost_found),
1114 #ifdef CONFIG_FS_VERITY
1115         ATTR_LIST(verity),
1116 #endif
1117         ATTR_LIST(sb_checksum),
1118 #if IS_ENABLED(CONFIG_UNICODE)
1119         ATTR_LIST(casefold),
1120 #endif
1121         ATTR_LIST(readonly),
1122 #ifdef CONFIG_F2FS_FS_COMPRESSION
1123         ATTR_LIST(compression),
1124 #endif
1125         ATTR_LIST(pin_file),
1126         NULL,
1127 };
1128 ATTRIBUTE_GROUPS(f2fs_feat);
1129
1130 F2FS_GENERAL_RO_ATTR(sb_status);
1131 F2FS_GENERAL_RO_ATTR(cp_status);
1132 static struct attribute *f2fs_stat_attrs[] = {
1133         ATTR_LIST(sb_status),
1134         ATTR_LIST(cp_status),
1135         NULL,
1136 };
1137 ATTRIBUTE_GROUPS(f2fs_stat);
1138
1139 F2FS_SB_FEATURE_RO_ATTR(encryption, ENCRYPT);
1140 F2FS_SB_FEATURE_RO_ATTR(block_zoned, BLKZONED);
1141 F2FS_SB_FEATURE_RO_ATTR(extra_attr, EXTRA_ATTR);
1142 F2FS_SB_FEATURE_RO_ATTR(project_quota, PRJQUOTA);
1143 F2FS_SB_FEATURE_RO_ATTR(inode_checksum, INODE_CHKSUM);
1144 F2FS_SB_FEATURE_RO_ATTR(flexible_inline_xattr, FLEXIBLE_INLINE_XATTR);
1145 F2FS_SB_FEATURE_RO_ATTR(quota_ino, QUOTA_INO);
1146 F2FS_SB_FEATURE_RO_ATTR(inode_crtime, INODE_CRTIME);
1147 F2FS_SB_FEATURE_RO_ATTR(lost_found, LOST_FOUND);
1148 F2FS_SB_FEATURE_RO_ATTR(verity, VERITY);
1149 F2FS_SB_FEATURE_RO_ATTR(sb_checksum, SB_CHKSUM);
1150 F2FS_SB_FEATURE_RO_ATTR(casefold, CASEFOLD);
1151 F2FS_SB_FEATURE_RO_ATTR(compression, COMPRESSION);
1152 F2FS_SB_FEATURE_RO_ATTR(readonly, RO);
1153
1154 static struct attribute *f2fs_sb_feat_attrs[] = {
1155         ATTR_LIST(sb_encryption),
1156         ATTR_LIST(sb_block_zoned),
1157         ATTR_LIST(sb_extra_attr),
1158         ATTR_LIST(sb_project_quota),
1159         ATTR_LIST(sb_inode_checksum),
1160         ATTR_LIST(sb_flexible_inline_xattr),
1161         ATTR_LIST(sb_quota_ino),
1162         ATTR_LIST(sb_inode_crtime),
1163         ATTR_LIST(sb_lost_found),
1164         ATTR_LIST(sb_verity),
1165         ATTR_LIST(sb_sb_checksum),
1166         ATTR_LIST(sb_casefold),
1167         ATTR_LIST(sb_compression),
1168         ATTR_LIST(sb_readonly),
1169         NULL,
1170 };
1171 ATTRIBUTE_GROUPS(f2fs_sb_feat);
1172
1173 static const struct sysfs_ops f2fs_attr_ops = {
1174         .show   = f2fs_attr_show,
1175         .store  = f2fs_attr_store,
1176 };
1177
1178 static const struct kobj_type f2fs_sb_ktype = {
1179         .default_groups = f2fs_groups,
1180         .sysfs_ops      = &f2fs_attr_ops,
1181         .release        = f2fs_sb_release,
1182 };
1183
1184 static const struct kobj_type f2fs_ktype = {
1185         .sysfs_ops      = &f2fs_attr_ops,
1186 };
1187
1188 static struct kset f2fs_kset = {
1189         .kobj   = {.ktype = &f2fs_ktype},
1190 };
1191
1192 static const struct kobj_type f2fs_feat_ktype = {
1193         .default_groups = f2fs_feat_groups,
1194         .sysfs_ops      = &f2fs_attr_ops,
1195 };
1196
1197 static struct kobject f2fs_feat = {
1198         .kset   = &f2fs_kset,
1199 };
1200
1201 static ssize_t f2fs_stat_attr_show(struct kobject *kobj,
1202                                 struct attribute *attr, char *buf)
1203 {
1204         struct f2fs_sb_info *sbi = container_of(kobj, struct f2fs_sb_info,
1205                                                                 s_stat_kobj);
1206         struct f2fs_attr *a = container_of(attr, struct f2fs_attr, attr);
1207
1208         return a->show ? a->show(a, sbi, buf) : 0;
1209 }
1210
1211 static ssize_t f2fs_stat_attr_store(struct kobject *kobj, struct attribute *attr,
1212                                                 const char *buf, size_t len)
1213 {
1214         struct f2fs_sb_info *sbi = container_of(kobj, struct f2fs_sb_info,
1215                                                                 s_stat_kobj);
1216         struct f2fs_attr *a = container_of(attr, struct f2fs_attr, attr);
1217
1218         return a->store ? a->store(a, sbi, buf, len) : 0;
1219 }
1220
1221 static void f2fs_stat_kobj_release(struct kobject *kobj)
1222 {
1223         struct f2fs_sb_info *sbi = container_of(kobj, struct f2fs_sb_info,
1224                                                                 s_stat_kobj);
1225         complete(&sbi->s_stat_kobj_unregister);
1226 }
1227
1228 static const struct sysfs_ops f2fs_stat_attr_ops = {
1229         .show   = f2fs_stat_attr_show,
1230         .store  = f2fs_stat_attr_store,
1231 };
1232
1233 static const struct kobj_type f2fs_stat_ktype = {
1234         .default_groups = f2fs_stat_groups,
1235         .sysfs_ops      = &f2fs_stat_attr_ops,
1236         .release        = f2fs_stat_kobj_release,
1237 };
1238
1239 static ssize_t f2fs_sb_feat_attr_show(struct kobject *kobj,
1240                                 struct attribute *attr, char *buf)
1241 {
1242         struct f2fs_sb_info *sbi = container_of(kobj, struct f2fs_sb_info,
1243                                                         s_feature_list_kobj);
1244         struct f2fs_attr *a = container_of(attr, struct f2fs_attr, attr);
1245
1246         return a->show ? a->show(a, sbi, buf) : 0;
1247 }
1248
1249 static void f2fs_feature_list_kobj_release(struct kobject *kobj)
1250 {
1251         struct f2fs_sb_info *sbi = container_of(kobj, struct f2fs_sb_info,
1252                                                         s_feature_list_kobj);
1253         complete(&sbi->s_feature_list_kobj_unregister);
1254 }
1255
1256 static const struct sysfs_ops f2fs_feature_list_attr_ops = {
1257         .show   = f2fs_sb_feat_attr_show,
1258 };
1259
1260 static const struct kobj_type f2fs_feature_list_ktype = {
1261         .default_groups = f2fs_sb_feat_groups,
1262         .sysfs_ops      = &f2fs_feature_list_attr_ops,
1263         .release        = f2fs_feature_list_kobj_release,
1264 };
1265
1266 static int __maybe_unused segment_info_seq_show(struct seq_file *seq,
1267                                                 void *offset)
1268 {
1269         struct super_block *sb = seq->private;
1270         struct f2fs_sb_info *sbi = F2FS_SB(sb);
1271         unsigned int total_segs =
1272                         le32_to_cpu(sbi->raw_super->segment_count_main);
1273         int i;
1274
1275         seq_puts(seq, "format: segment_type|valid_blocks\n"
1276                 "segment_type(0:HD, 1:WD, 2:CD, 3:HN, 4:WN, 5:CN)\n");
1277
1278         for (i = 0; i < total_segs; i++) {
1279                 struct seg_entry *se = get_seg_entry(sbi, i);
1280
1281                 if ((i % 10) == 0)
1282                         seq_printf(seq, "%-10d", i);
1283                 seq_printf(seq, "%d|%-3u", se->type, se->valid_blocks);
1284                 if ((i % 10) == 9 || i == (total_segs - 1))
1285                         seq_putc(seq, '\n');
1286                 else
1287                         seq_putc(seq, ' ');
1288         }
1289
1290         return 0;
1291 }
1292
1293 static int __maybe_unused segment_bits_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         unsigned int total_segs =
1299                         le32_to_cpu(sbi->raw_super->segment_count_main);
1300         int i, j;
1301
1302         seq_puts(seq, "format: segment_type|valid_blocks|bitmaps\n"
1303                 "segment_type(0:HD, 1:WD, 2:CD, 3:HN, 4:WN, 5:CN)\n");
1304
1305         for (i = 0; i < total_segs; i++) {
1306                 struct seg_entry *se = get_seg_entry(sbi, i);
1307
1308                 seq_printf(seq, "%-10d", i);
1309                 seq_printf(seq, "%d|%-3u|", se->type, se->valid_blocks);
1310                 for (j = 0; j < SIT_VBLOCK_MAP_SIZE; j++)
1311                         seq_printf(seq, " %.2x", se->cur_valid_map[j]);
1312                 seq_putc(seq, '\n');
1313         }
1314         return 0;
1315 }
1316
1317 static int __maybe_unused victim_bits_seq_show(struct seq_file *seq,
1318                                                 void *offset)
1319 {
1320         struct super_block *sb = seq->private;
1321         struct f2fs_sb_info *sbi = F2FS_SB(sb);
1322         struct dirty_seglist_info *dirty_i = DIRTY_I(sbi);
1323         int i;
1324
1325         seq_puts(seq, "format: victim_secmap bitmaps\n");
1326
1327         for (i = 0; i < MAIN_SECS(sbi); i++) {
1328                 if ((i % 10) == 0)
1329                         seq_printf(seq, "%-10d", i);
1330                 seq_printf(seq, "%d", test_bit(i, dirty_i->victim_secmap) ? 1 : 0);
1331                 if ((i % 10) == 9 || i == (MAIN_SECS(sbi) - 1))
1332                         seq_putc(seq, '\n');
1333                 else
1334                         seq_putc(seq, ' ');
1335         }
1336         return 0;
1337 }
1338
1339 static int __maybe_unused discard_plist_seq_show(struct seq_file *seq,
1340                                                 void *offset)
1341 {
1342         struct super_block *sb = seq->private;
1343         struct f2fs_sb_info *sbi = F2FS_SB(sb);
1344         struct discard_cmd_control *dcc = SM_I(sbi)->dcc_info;
1345         int i, count;
1346
1347         seq_puts(seq, "Discard pend list(Show diacrd_cmd count on each entry, .:not exist):\n");
1348         if (!f2fs_realtime_discard_enable(sbi))
1349                 return 0;
1350
1351         if (dcc) {
1352                 mutex_lock(&dcc->cmd_lock);
1353                 for (i = 0; i < MAX_PLIST_NUM; i++) {
1354                         struct list_head *pend_list;
1355                         struct discard_cmd *dc, *tmp;
1356
1357                         if (i % 8 == 0)
1358                                 seq_printf(seq, "  %-3d", i);
1359                         count = 0;
1360                         pend_list = &dcc->pend_list[i];
1361                         list_for_each_entry_safe(dc, tmp, pend_list, list)
1362                                 count++;
1363                         if (count)
1364                                 seq_printf(seq, " %7d", count);
1365                         else
1366                                 seq_puts(seq, "       .");
1367                         if (i % 8 == 7)
1368                                 seq_putc(seq, '\n');
1369                 }
1370                 seq_putc(seq, '\n');
1371                 mutex_unlock(&dcc->cmd_lock);
1372         }
1373
1374         return 0;
1375 }
1376
1377 int __init f2fs_init_sysfs(void)
1378 {
1379         int ret;
1380
1381         kobject_set_name(&f2fs_kset.kobj, "f2fs");
1382         f2fs_kset.kobj.parent = fs_kobj;
1383         ret = kset_register(&f2fs_kset);
1384         if (ret)
1385                 return ret;
1386
1387         ret = kobject_init_and_add(&f2fs_feat, &f2fs_feat_ktype,
1388                                    NULL, "features");
1389         if (ret) {
1390                 kobject_put(&f2fs_feat);
1391                 kset_unregister(&f2fs_kset);
1392         } else {
1393                 f2fs_proc_root = proc_mkdir("fs/f2fs", NULL);
1394         }
1395         return ret;
1396 }
1397
1398 void f2fs_exit_sysfs(void)
1399 {
1400         kobject_put(&f2fs_feat);
1401         kset_unregister(&f2fs_kset);
1402         remove_proc_entry("fs/f2fs", NULL);
1403         f2fs_proc_root = NULL;
1404 }
1405
1406 int f2fs_register_sysfs(struct f2fs_sb_info *sbi)
1407 {
1408         struct super_block *sb = sbi->sb;
1409         int err;
1410
1411         sbi->s_kobj.kset = &f2fs_kset;
1412         init_completion(&sbi->s_kobj_unregister);
1413         err = kobject_init_and_add(&sbi->s_kobj, &f2fs_sb_ktype, NULL,
1414                                 "%s", sb->s_id);
1415         if (err)
1416                 goto put_sb_kobj;
1417
1418         sbi->s_stat_kobj.kset = &f2fs_kset;
1419         init_completion(&sbi->s_stat_kobj_unregister);
1420         err = kobject_init_and_add(&sbi->s_stat_kobj, &f2fs_stat_ktype,
1421                                                 &sbi->s_kobj, "stat");
1422         if (err)
1423                 goto put_stat_kobj;
1424
1425         sbi->s_feature_list_kobj.kset = &f2fs_kset;
1426         init_completion(&sbi->s_feature_list_kobj_unregister);
1427         err = kobject_init_and_add(&sbi->s_feature_list_kobj,
1428                                         &f2fs_feature_list_ktype,
1429                                         &sbi->s_kobj, "feature_list");
1430         if (err)
1431                 goto put_feature_list_kobj;
1432
1433         if (f2fs_proc_root)
1434                 sbi->s_proc = proc_mkdir(sb->s_id, f2fs_proc_root);
1435
1436         if (sbi->s_proc) {
1437                 proc_create_single_data("segment_info", 0444, sbi->s_proc,
1438                                 segment_info_seq_show, sb);
1439                 proc_create_single_data("segment_bits", 0444, sbi->s_proc,
1440                                 segment_bits_seq_show, sb);
1441 #ifdef CONFIG_F2FS_IOSTAT
1442                 proc_create_single_data("iostat_info", 0444, sbi->s_proc,
1443                                 iostat_info_seq_show, sb);
1444 #endif
1445                 proc_create_single_data("victim_bits", 0444, sbi->s_proc,
1446                                 victim_bits_seq_show, sb);
1447                 proc_create_single_data("discard_plist_info", 0444, sbi->s_proc,
1448                                 discard_plist_seq_show, sb);
1449         }
1450         return 0;
1451 put_feature_list_kobj:
1452         kobject_put(&sbi->s_feature_list_kobj);
1453         wait_for_completion(&sbi->s_feature_list_kobj_unregister);
1454 put_stat_kobj:
1455         kobject_put(&sbi->s_stat_kobj);
1456         wait_for_completion(&sbi->s_stat_kobj_unregister);
1457 put_sb_kobj:
1458         kobject_put(&sbi->s_kobj);
1459         wait_for_completion(&sbi->s_kobj_unregister);
1460         return err;
1461 }
1462
1463 void f2fs_unregister_sysfs(struct f2fs_sb_info *sbi)
1464 {
1465         if (sbi->s_proc)
1466                 remove_proc_subtree(sbi->sb->s_id, f2fs_proc_root);
1467
1468         kobject_put(&sbi->s_stat_kobj);
1469         wait_for_completion(&sbi->s_stat_kobj_unregister);
1470         kobject_put(&sbi->s_feature_list_kobj);
1471         wait_for_completion(&sbi->s_feature_list_kobj_unregister);
1472
1473         kobject_put(&sbi->s_kobj);
1474         wait_for_completion(&sbi->s_kobj_unregister);
1475 }