fs/f2fs/sysfs.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 /*
   3  * f2fs sysfs interface
   4  *
   5  * Copyright (c) 2012 Samsung Electronics Co., Ltd.
   6  *             http://www.samsung.com/
   7  * Copyright (c) 2017 Chao Yu <chao@kernel.org>
   8  */
   9 #include <linux/compiler.h>
  10 #include <linux/proc_fs.h>
  11 #include <linux/f2fs_fs.h>
  12 #include <linux/seq_file.h>
  13 #include <linux/unicode.h>
  14 #include <linux/ioprio.h>
  15 #include <linux/sysfs.h>
  16
  17 #include "f2fs.h"
  18 #include "segment.h"
  19 #include "gc.h"
  20 #include "iostat.h"
  21 #include <trace/events/f2fs.h>
  22
  23 static struct proc_dir_entry *f2fs_proc_root;
  24
  25 /* Sysfs support for f2fs */
  26 enum {
  27         GC_THREAD,      /* struct f2fs_gc_thread */
  28         SM_INFO,        /* struct f2fs_sm_info */
  29         DCC_INFO,       /* struct discard_cmd_control */
  30         NM_INFO,        /* struct f2fs_nm_info */
  31         F2FS_SBI,       /* struct f2fs_sb_info */
  32 #ifdef CONFIG_F2FS_STAT_FS
  33         STAT_INFO,      /* struct f2fs_stat_info */
  34 #endif
  35 #ifdef CONFIG_F2FS_FAULT_INJECTION
  36         FAULT_INFO_RATE,        /* struct f2fs_fault_info */
  37         FAULT_INFO_TYPE,        /* struct f2fs_fault_info */
  38 #endif
  39         RESERVED_BLOCKS,        /* struct f2fs_sb_info */
  40         CPRC_INFO,      /* struct ckpt_req_control */
  41         ATGC_INFO,      /* struct atgc_management */
  42 };
  43
  44 static const char *gc_mode_names[MAX_GC_MODE] = {
  45         "GC_NORMAL",
  46         "GC_IDLE_CB",
  47         "GC_IDLE_GREEDY",
  48         "GC_IDLE_AT",
  49         "GC_URGENT_HIGH",
  50         "GC_URGENT_LOW",
  51         "GC_URGENT_MID"
  52 };
  53
  54 struct f2fs_attr {
  55         struct attribute attr;
  56         ssize_t (*show)(struct f2fs_attr *a, struct f2fs_sb_info *sbi, char *buf);
  57         ssize_t (*store)(struct f2fs_attr *a, struct f2fs_sb_info *sbi,
  58                          const char *buf, size_t len);
  59         int struct_type;
  60         int offset;
  61         int id;
  62 };
  63
  64 static ssize_t f2fs_sbi_show(struct f2fs_attr *a,
  65                              struct f2fs_sb_info *sbi, char *buf);
  66
  67 static unsigned char *__struct_ptr(struct f2fs_sb_info *sbi, int struct_type)
  68 {
  69         if (struct_type == GC_THREAD)
  70                 return (unsigned char *)sbi->gc_thread;
  71         else if (struct_type == SM_INFO)
  72                 return (unsigned char *)SM_I(sbi);
  73         else if (struct_type == DCC_INFO)
  74                 return (unsigned char *)SM_I(sbi)->dcc_info;
  75         else if (struct_type == NM_INFO)
  76                 return (unsigned char *)NM_I(sbi);
  77         else if (struct_type == F2FS_SBI || struct_type == RESERVED_BLOCKS)
  78                 return (unsigned char *)sbi;
  79 #ifdef CONFIG_F2FS_FAULT_INJECTION
  80         else if (struct_type == FAULT_INFO_RATE ||
  81                                         struct_type == FAULT_INFO_TYPE)
  82                 return (unsigned char *)&F2FS_OPTION(sbi).fault_info;
  83 #endif
  84 #ifdef CONFIG_F2FS_STAT_FS
  85         else if (struct_type == STAT_INFO)
  86                 return (unsigned char *)F2FS_STAT(sbi);
  87 #endif
  88         else if (struct_type == CPRC_INFO)
  89                 return (unsigned char *)&sbi->cprc_info;
  90         else if (struct_type == ATGC_INFO)
  91                 return (unsigned char *)&sbi->am;
  92         return NULL;
  93 }
  94
  95 static ssize_t dirty_segments_show(struct f2fs_attr *a,
  96                 struct f2fs_sb_info *sbi, char *buf)
  97 {
  98         return sysfs_emit(buf, "%llu\n",
  99                         (unsigned long long)(dirty_segments(sbi)));
 100 }
 101
 102 static ssize_t free_segments_show(struct f2fs_attr *a,
 103                 struct f2fs_sb_info *sbi, char *buf)
 104 {
 105         return sysfs_emit(buf, "%llu\n",
 106                         (unsigned long long)(free_segments(sbi)));
 107 }
 108
 109 static ssize_t ovp_segments_show(struct f2fs_attr *a,
 110                 struct f2fs_sb_info *sbi, char *buf)
 111 {
 112         return sysfs_emit(buf, "%llu\n",
 113                         (unsigned long long)(overprovision_segments(sbi)));
 114 }
 115
 116 static ssize_t lifetime_write_kbytes_show(struct f2fs_attr *a,
 117                 struct f2fs_sb_info *sbi, char *buf)
 118 {
 119         return sysfs_emit(buf, "%llu\n",
 120                         (unsigned long long)(sbi->kbytes_written +
 121                         ((f2fs_get_sectors_written(sbi) -
 122                                 sbi->sectors_written_start) >> 1)));
 123 }
 124
 125 static ssize_t sb_status_show(struct f2fs_attr *a,
 126                 struct f2fs_sb_info *sbi, char *buf)
 127 {
 128         return sysfs_emit(buf, "%lx\n", sbi->s_flag);
 129 }
 130
 131 static ssize_t cp_status_show(struct f2fs_attr *a,
 132                 struct f2fs_sb_info *sbi, char *buf)
 133 {
 134         return sysfs_emit(buf, "%x\n", le32_to_cpu(F2FS_CKPT(sbi)->ckpt_flags));
 135 }
 136
 137 static ssize_t pending_discard_show(struct f2fs_attr *a,
 138                 struct f2fs_sb_info *sbi, char *buf)
 139 {
 140         if (!SM_I(sbi)->dcc_info)
 141                 return -EINVAL;
 142         return sysfs_emit(buf, "%llu\n", (unsigned long long)atomic_read(
 143                                 &SM_I(sbi)->dcc_info->discard_cmd_cnt));
 144 }
 145
 146 static ssize_t 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 #ifdef CONFIG_F2FS_STAT_FS
 360         if (!strcmp(a->attr.name, "cp_foreground_calls"))
 361                 return sysfs_emit(buf, "%d\n",
 362                                 atomic_read(&sbi->cp_call_count[TOTAL_CALL]) -
 363                                 atomic_read(&sbi->cp_call_count[BACKGROUND]));
 364         if (!strcmp(a->attr.name, "cp_background_calls"))
 365                 return sysfs_emit(buf, "%d\n",
 366                                 atomic_read(&sbi->cp_call_count[BACKGROUND]));
 367 #endif
 368
 369         ui = (unsigned int *)(ptr + a->offset);
 370
 371         return sysfs_emit(buf, "%u\n", *ui);
 372 }
 373
 374 static ssize_t __sbi_store(struct f2fs_attr *a,
 375                         struct f2fs_sb_info *sbi,
 376                         const char *buf, size_t count)
 377 {
 378         unsigned char *ptr;
 379         unsigned long t;
 380         unsigned int *ui;
 381         ssize_t ret;
 382
 383         ptr = __struct_ptr(sbi, a->struct_type);
 384         if (!ptr)
 385                 return -EINVAL;
 386
 387         if (!strcmp(a->attr.name, "extension_list")) {
 388                 const char *name = strim((char *)buf);
 389                 bool set = true, hot;
 390
 391                 if (!strncmp(name, "[h]", 3))
 392                         hot = true;
 393                 else if (!strncmp(name, "[c]", 3))
 394                         hot = false;
 395                 else
 396                         return -EINVAL;
 397
 398                 name += 3;
 399
 400                 if (*name == '!') {
 401                         name++;
 402                         set = false;
 403                 }
 404
 405                 if (!strlen(name) || strlen(name) >= F2FS_EXTENSION_LEN)
 406                         return -EINVAL;
 407
 408                 f2fs_down_write(&sbi->sb_lock);
 409
 410                 ret = f2fs_update_extension_list(sbi, name, hot, set);
 411                 if (ret)
 412                         goto out;
 413
 414                 ret = f2fs_commit_super(sbi, false);
 415                 if (ret)
 416                         f2fs_update_extension_list(sbi, name, hot, !set);
 417 out:
 418                 f2fs_up_write(&sbi->sb_lock);
 419                 return ret ? ret : count;
 420         }
 421
 422         if (!strcmp(a->attr.name, "ckpt_thread_ioprio")) {
 423                 const char *name = strim((char *)buf);
 424                 struct ckpt_req_control *cprc = &sbi->cprc_info;
 425                 int class;
 426                 long data;
 427                 int ret;
 428
 429                 if (!strncmp(name, "rt,", 3))
 430                         class = IOPRIO_CLASS_RT;
 431                 else if (!strncmp(name, "be,", 3))
 432                         class = IOPRIO_CLASS_BE;
 433                 else
 434                         return -EINVAL;
 435
 436                 name += 3;
 437                 ret = kstrtol(name, 10, &data);
 438                 if (ret)
 439                         return ret;
 440                 if (data >= IOPRIO_NR_LEVELS || data < 0)
 441                         return -EINVAL;
 442
 443                 cprc->ckpt_thread_ioprio = IOPRIO_PRIO_VALUE(class, data);
 444                 if (test_opt(sbi, MERGE_CHECKPOINT)) {
 445                         ret = set_task_ioprio(cprc->f2fs_issue_ckpt,
 446                                         cprc->ckpt_thread_ioprio);
 447                         if (ret)
 448                                 return ret;
 449                 }
 450
 451                 return count;
 452         }
 453
 454         ui = (unsigned int *)(ptr + a->offset);
 455
 456         ret = kstrtoul(skip_spaces(buf), 0, &t);
 457         if (ret < 0)
 458                 return ret;
 459 #ifdef CONFIG_F2FS_FAULT_INJECTION
 460         if (a->struct_type == FAULT_INFO_TYPE && t >= BIT(FAULT_MAX))
 461                 return -EINVAL;
 462         if (a->struct_type == FAULT_INFO_RATE && t >= UINT_MAX)
 463                 return -EINVAL;
 464 #endif
 465         if (a->struct_type == RESERVED_BLOCKS) {
 466                 spin_lock(&sbi->stat_lock);
 467                 if (t > (unsigned long)(sbi->user_block_count -
 468                                 F2FS_OPTION(sbi).root_reserved_blocks -
 469                                 sbi->blocks_per_seg *
 470                                 SM_I(sbi)->additional_reserved_segments)) {
 471                         spin_unlock(&sbi->stat_lock);
 472                         return -EINVAL;
 473                 }
 474                 *ui = t;
 475                 sbi->current_reserved_blocks = min(sbi->reserved_blocks,
 476                                 sbi->user_block_count - valid_user_blocks(sbi));
 477                 spin_unlock(&sbi->stat_lock);
 478                 return count;
 479         }
 480
 481         if (!strcmp(a->attr.name, "discard_io_aware_gran")) {
 482                 if (t > MAX_PLIST_NUM)
 483                         return -EINVAL;
 484                 if (!f2fs_block_unit_discard(sbi))
 485                         return -EINVAL;
 486                 if (t == *ui)
 487                         return count;
 488                 *ui = t;
 489                 return count;
 490         }
 491
 492         if (!strcmp(a->attr.name, "discard_granularity")) {
 493                 if (t == 0 || t > MAX_PLIST_NUM)
 494                         return -EINVAL;
 495                 if (!f2fs_block_unit_discard(sbi))
 496                         return -EINVAL;
 497                 if (t == *ui)
 498                         return count;
 499                 *ui = t;
 500                 return count;
 501         }
 502
 503         if (!strcmp(a->attr.name, "max_ordered_discard")) {
 504                 if (t == 0 || t > MAX_PLIST_NUM)
 505                         return -EINVAL;
 506                 if (!f2fs_block_unit_discard(sbi))
 507                         return -EINVAL;
 508                 *ui = t;
 509                 return count;
 510         }
 511
 512         if (!strcmp(a->attr.name, "discard_urgent_util")) {
 513                 if (t > 100)
 514                         return -EINVAL;
 515                 *ui = t;
 516                 return count;
 517         }
 518
 519         if (!strcmp(a->attr.name, "migration_granularity")) {
 520                 if (t == 0 || t > sbi->segs_per_sec)
 521                         return -EINVAL;
 522         }
 523
 524         if (!strcmp(a->attr.name, "gc_urgent")) {
 525                 if (t == 0) {
 526                         sbi->gc_mode = GC_NORMAL;
 527                 } else if (t == 1) {
 528                         sbi->gc_mode = GC_URGENT_HIGH;
 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                                 wake_up_discard_thread(sbi, true);
 534                         }
 535                 } else if (t == 2) {
 536                         sbi->gc_mode = GC_URGENT_LOW;
 537                 } else if (t == 3) {
 538                         sbi->gc_mode = GC_URGENT_MID;
 539                         if (sbi->gc_thread) {
 540                                 sbi->gc_thread->gc_wake = true;
 541                                 wake_up_interruptible_all(
 542                                         &sbi->gc_thread->gc_wait_queue_head);
 543                         }
 544                 } else {
 545                         return -EINVAL;
 546                 }
 547                 return count;
 548         }
 549         if (!strcmp(a->attr.name, "gc_idle")) {
 550                 if (t == GC_IDLE_CB) {
 551                         sbi->gc_mode = GC_IDLE_CB;
 552                 } else if (t == GC_IDLE_GREEDY) {
 553                         sbi->gc_mode = GC_IDLE_GREEDY;
 554                 } else if (t == GC_IDLE_AT) {
 555                         if (!sbi->am.atgc_enabled)
 556                                 return -EINVAL;
 557                         sbi->gc_mode = GC_IDLE_AT;
 558                 } else {
 559                         sbi->gc_mode = GC_NORMAL;
 560                 }
 561                 return count;
 562         }
 563
 564         if (!strcmp(a->attr.name, "gc_remaining_trials")) {
 565                 spin_lock(&sbi->gc_remaining_trials_lock);
 566                 sbi->gc_remaining_trials = t;
 567                 spin_unlock(&sbi->gc_remaining_trials_lock);
 568
 569                 return count;
 570         }
 571
 572 #ifdef CONFIG_F2FS_IOSTAT
 573         if (!strcmp(a->attr.name, "iostat_enable")) {
 574                 sbi->iostat_enable = !!t;
 575                 if (!sbi->iostat_enable)
 576                         f2fs_reset_iostat(sbi);
 577                 return count;
 578         }
 579
 580         if (!strcmp(a->attr.name, "iostat_period_ms")) {
 581                 if (t < MIN_IOSTAT_PERIOD_MS || t > MAX_IOSTAT_PERIOD_MS)
 582                         return -EINVAL;
 583                 spin_lock_irq(&sbi->iostat_lock);
 584                 sbi->iostat_period_ms = (unsigned int)t;
 585                 spin_unlock_irq(&sbi->iostat_lock);
 586                 return count;
 587         }
 588 #endif
 589
 590 #ifdef CONFIG_F2FS_FS_COMPRESSION
 591         if (!strcmp(a->attr.name, "compr_written_block") ||
 592                 !strcmp(a->attr.name, "compr_saved_block")) {
 593                 if (t != 0)
 594                         return -EINVAL;
 595                 sbi->compr_written_block = 0;
 596                 sbi->compr_saved_block = 0;
 597                 return count;
 598         }
 599
 600         if (!strcmp(a->attr.name, "compr_new_inode")) {
 601                 if (t != 0)
 602                         return -EINVAL;
 603                 sbi->compr_new_inode = 0;
 604                 return count;
 605         }
 606
 607         if (!strcmp(a->attr.name, "compress_percent")) {
 608                 if (t == 0 || t > 100)
 609                         return -EINVAL;
 610                 *ui = t;
 611                 return count;
 612         }
 613
 614         if (!strcmp(a->attr.name, "compress_watermark")) {
 615                 if (t == 0 || t > 100)
 616                         return -EINVAL;
 617                 *ui = t;
 618                 return count;
 619         }
 620 #endif
 621
 622         if (!strcmp(a->attr.name, "atgc_candidate_ratio")) {
 623                 if (t > 100)
 624                         return -EINVAL;
 625                 sbi->am.candidate_ratio = t;
 626                 return count;
 627         }
 628
 629         if (!strcmp(a->attr.name, "atgc_age_weight")) {
 630                 if (t > 100)
 631                         return -EINVAL;
 632                 sbi->am.age_weight = t;
 633                 return count;
 634         }
 635
 636         if (!strcmp(a->attr.name, "gc_segment_mode")) {
 637                 if (t < MAX_GC_MODE)
 638                         sbi->gc_segment_mode = t;
 639                 else
 640                         return -EINVAL;
 641                 return count;
 642         }
 643
 644         if (!strcmp(a->attr.name, "gc_reclaimed_segments")) {
 645                 if (t != 0)
 646                         return -EINVAL;
 647                 sbi->gc_reclaimed_segs[sbi->gc_segment_mode] = 0;
 648                 return count;
 649         }
 650
 651         if (!strcmp(a->attr.name, "seq_file_ra_mul")) {
 652                 if (t >= MIN_RA_MUL && t <= MAX_RA_MUL)
 653                         sbi->seq_file_ra_mul = t;
 654                 else
 655                         return -EINVAL;
 656                 return count;
 657         }
 658
 659         if (!strcmp(a->attr.name, "max_fragment_chunk")) {
 660                 if (t >= MIN_FRAGMENT_SIZE && t <= MAX_FRAGMENT_SIZE)
 661                         sbi->max_fragment_chunk = t;
 662                 else
 663                         return -EINVAL;
 664                 return count;
 665         }
 666
 667         if (!strcmp(a->attr.name, "max_fragment_hole")) {
 668                 if (t >= MIN_FRAGMENT_SIZE && t <= MAX_FRAGMENT_SIZE)
 669                         sbi->max_fragment_hole = t;
 670                 else
 671                         return -EINVAL;
 672                 return count;
 673         }
 674
 675         if (!strcmp(a->attr.name, "peak_atomic_write")) {
 676                 if (t != 0)
 677                         return -EINVAL;
 678                 sbi->peak_atomic_write = 0;
 679                 return count;
 680         }
 681
 682         if (!strcmp(a->attr.name, "committed_atomic_block")) {
 683                 if (t != 0)
 684                         return -EINVAL;
 685                 sbi->committed_atomic_block = 0;
 686                 return count;
 687         }
 688
 689         if (!strcmp(a->attr.name, "revoked_atomic_block")) {
 690                 if (t != 0)
 691                         return -EINVAL;
 692                 sbi->revoked_atomic_block = 0;
 693                 return count;
 694         }
 695
 696         if (!strcmp(a->attr.name, "readdir_ra")) {
 697                 sbi->readdir_ra = !!t;
 698                 return count;
 699         }
 700
 701         if (!strcmp(a->attr.name, "hot_data_age_threshold")) {
 702                 if (t == 0 || t >= sbi->warm_data_age_threshold)
 703                         return -EINVAL;
 704                 if (t == *ui)
 705                         return count;
 706                 *ui = (unsigned int)t;
 707                 return count;
 708         }
 709
 710         if (!strcmp(a->attr.name, "warm_data_age_threshold")) {
 711                 if (t <= sbi->hot_data_age_threshold)
 712                         return -EINVAL;
 713                 if (t == *ui)
 714                         return count;
 715                 *ui = (unsigned int)t;
 716                 return count;
 717         }
 718
 719         if (!strcmp(a->attr.name, "last_age_weight")) {
 720                 if (t > 100)
 721                         return -EINVAL;
 722                 if (t == *ui)
 723                         return count;
 724                 *ui = (unsigned int)t;
 725                 return count;
 726         }
 727
 728         if (!strcmp(a->attr.name, "ipu_policy")) {
 729                 if (t >= BIT(F2FS_IPU_MAX))
 730                         return -EINVAL;
 731                 if (t && f2fs_lfs_mode(sbi))
 732                         return -EINVAL;
 733                 SM_I(sbi)->ipu_policy = (unsigned int)t;
 734                 return count;
 735         }
 736
 737         *ui = (unsigned int)t;
 738
 739         return count;
 740 }
 741
 742 static ssize_t f2fs_sbi_store(struct f2fs_attr *a,
 743                         struct f2fs_sb_info *sbi,
 744                         const char *buf, size_t count)
 745 {
 746         ssize_t ret;
 747         bool gc_entry = (!strcmp(a->attr.name, "gc_urgent") ||
 748                                         a->struct_type == GC_THREAD);
 749
 750         if (gc_entry) {
 751                 if (!down_read_trylock(&sbi->sb->s_umount))
 752                         return -EAGAIN;
 753         }
 754         ret = __sbi_store(a, sbi, buf, count);
 755         if (gc_entry)
 756                 up_read(&sbi->sb->s_umount);
 757
 758         return ret;
 759 }
 760
 761 static ssize_t f2fs_attr_show(struct kobject *kobj,
 762                                 struct attribute *attr, char *buf)
 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->show ? a->show(a, sbi, buf) : 0;
 769 }
 770
 771 static ssize_t f2fs_attr_store(struct kobject *kobj, struct attribute *attr,
 772                                                 const char *buf, size_t len)
 773 {
 774         struct f2fs_sb_info *sbi = container_of(kobj, struct f2fs_sb_info,
 775                                                                         s_kobj);
 776         struct f2fs_attr *a = container_of(attr, struct f2fs_attr, attr);
 777
 778         return a->store ? a->store(a, sbi, buf, len) : 0;
 779 }
 780
 781 static void f2fs_sb_release(struct kobject *kobj)
 782 {
 783         struct f2fs_sb_info *sbi = container_of(kobj, struct f2fs_sb_info,
 784                                                                 s_kobj);
 785         complete(&sbi->s_kobj_unregister);
 786 }
 787
 788 /*
 789  * Note that there are three feature list entries:
 790  * 1) /sys/fs/f2fs/features
 791  *   : shows runtime features supported by in-kernel f2fs along with Kconfig.
 792  *     - ref. F2FS_FEATURE_RO_ATTR()
 793  *
 794  * 2) /sys/fs/f2fs/$s_id/features <deprecated>
 795  *   : shows on-disk features enabled by mkfs.f2fs, used for old kernels. This
 796  *     won't add new feature anymore, and thus, users should check entries in 3)
 797  *     instead of this 2).
 798  *
 799  * 3) /sys/fs/f2fs/$s_id/feature_list
 800  *   : shows on-disk features enabled by mkfs.f2fs per instance, which follows
 801  *     sysfs entry rule where each entry should expose single value.
 802  *     This list covers old feature list provided by 2) and beyond. Therefore,
 803  *     please add new on-disk feature in this list only.
 804  *     - ref. F2FS_SB_FEATURE_RO_ATTR()
 805  */
 806 static ssize_t f2fs_feature_show(struct f2fs_attr *a,
 807                 struct f2fs_sb_info *sbi, char *buf)
 808 {
 809         return sysfs_emit(buf, "supported\n");
 810 }
 811
 812 #define F2FS_FEATURE_RO_ATTR(_name)                             \
 813 static struct f2fs_attr f2fs_attr_##_name = {                   \
 814         .attr = {.name = __stringify(_name), .mode = 0444 },    \
 815         .show   = f2fs_feature_show,                            \
 816 }
 817
 818 static ssize_t f2fs_sb_feature_show(struct f2fs_attr *a,
 819                 struct f2fs_sb_info *sbi, char *buf)
 820 {
 821         if (F2FS_HAS_FEATURE(sbi, a->id))
 822                 return sysfs_emit(buf, "supported\n");
 823         return sysfs_emit(buf, "unsupported\n");
 824 }
 825
 826 #define F2FS_SB_FEATURE_RO_ATTR(_name, _feat)                   \
 827 static struct f2fs_attr f2fs_attr_sb_##_name = {                \
 828         .attr = {.name = __stringify(_name), .mode = 0444 },    \
 829         .show   = f2fs_sb_feature_show,                         \
 830         .id     = F2FS_FEATURE_##_feat,                         \
 831 }
 832
 833 #define F2FS_ATTR_OFFSET(_struct_type, _name, _mode, _show, _store, _offset) \
 834 static struct f2fs_attr f2fs_attr_##_name = {                   \
 835         .attr = {.name = __stringify(_name), .mode = _mode },   \
 836         .show   = _show,                                        \
 837         .store  = _store,                                       \
 838         .struct_type = _struct_type,                            \
 839         .offset = _offset                                       \
 840 }
 841
 842 #define F2FS_RO_ATTR(struct_type, struct_name, name, elname)    \
 843         F2FS_ATTR_OFFSET(struct_type, name, 0444,               \
 844                 f2fs_sbi_show, NULL,                            \
 845                 offsetof(struct struct_name, elname))
 846
 847 #define F2FS_RW_ATTR(struct_type, struct_name, name, elname)    \
 848         F2FS_ATTR_OFFSET(struct_type, name, 0644,               \
 849                 f2fs_sbi_show, f2fs_sbi_store,                  \
 850                 offsetof(struct struct_name, elname))
 851
 852 #define F2FS_GENERAL_RO_ATTR(name) \
 853 static struct f2fs_attr f2fs_attr_##name = __ATTR(name, 0444, name##_show, NULL)
 854
 855 #ifdef CONFIG_F2FS_STAT_FS
 856 #define STAT_INFO_RO_ATTR(name, elname)                         \
 857         F2FS_RO_ATTR(STAT_INFO, f2fs_stat_info, name, elname)
 858 #endif
 859
 860 #define GC_THREAD_RW_ATTR(name, elname)                         \
 861         F2FS_RW_ATTR(GC_THREAD, f2fs_gc_kthread, name, elname)
 862
 863 #define SM_INFO_RW_ATTR(name, elname)                           \
 864         F2FS_RW_ATTR(SM_INFO, f2fs_sm_info, name, elname)
 865
 866 #define SM_INFO_GENERAL_RW_ATTR(elname)                         \
 867         SM_INFO_RW_ATTR(elname, elname)
 868
 869 #define DCC_INFO_RW_ATTR(name, elname)                          \
 870         F2FS_RW_ATTR(DCC_INFO, discard_cmd_control, name, elname)
 871
 872 #define DCC_INFO_GENERAL_RW_ATTR(elname)                        \
 873         DCC_INFO_RW_ATTR(elname, elname)
 874
 875 #define NM_INFO_RW_ATTR(name, elname)                           \
 876         F2FS_RW_ATTR(NM_INFO, f2fs_nm_info, name, elname)
 877
 878 #define NM_INFO_GENERAL_RW_ATTR(elname)                         \
 879         NM_INFO_RW_ATTR(elname, elname)
 880
 881 #define F2FS_SBI_RW_ATTR(name, elname)                          \
 882         F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, name, elname)
 883
 884 #define F2FS_SBI_GENERAL_RW_ATTR(elname)                        \
 885         F2FS_SBI_RW_ATTR(elname, elname)
 886
 887 #define F2FS_SBI_GENERAL_RO_ATTR(elname)                        \
 888         F2FS_RO_ATTR(F2FS_SBI, f2fs_sb_info, elname, elname)
 889
 890 #ifdef CONFIG_F2FS_FAULT_INJECTION
 891 #define FAULT_INFO_GENERAL_RW_ATTR(type, elname)                \
 892         F2FS_RW_ATTR(type, f2fs_fault_info, elname, elname)
 893 #endif
 894
 895 #define RESERVED_BLOCKS_GENERAL_RW_ATTR(elname)                 \
 896         F2FS_RW_ATTR(RESERVED_BLOCKS, f2fs_sb_info, elname, elname)
 897
 898 #define CPRC_INFO_GENERAL_RW_ATTR(elname)                       \
 899         F2FS_RW_ATTR(CPRC_INFO, ckpt_req_control, elname, elname)
 900
 901 #define ATGC_INFO_RW_ATTR(name, elname)                         \
 902         F2FS_RW_ATTR(ATGC_INFO, atgc_management, name, elname)
 903
 904 /* GC_THREAD ATTR */
 905 GC_THREAD_RW_ATTR(gc_urgent_sleep_time, urgent_sleep_time);
 906 GC_THREAD_RW_ATTR(gc_min_sleep_time, min_sleep_time);
 907 GC_THREAD_RW_ATTR(gc_max_sleep_time, max_sleep_time);
 908 GC_THREAD_RW_ATTR(gc_no_gc_sleep_time, no_gc_sleep_time);
 909
 910 /* SM_INFO ATTR */
 911 SM_INFO_RW_ATTR(reclaim_segments, rec_prefree_segments);
 912 SM_INFO_GENERAL_RW_ATTR(ipu_policy);
 913 SM_INFO_GENERAL_RW_ATTR(min_ipu_util);
 914 SM_INFO_GENERAL_RW_ATTR(min_fsync_blocks);
 915 SM_INFO_GENERAL_RW_ATTR(min_seq_blocks);
 916 SM_INFO_GENERAL_RW_ATTR(min_hot_blocks);
 917 SM_INFO_GENERAL_RW_ATTR(min_ssr_sections);
 918
 919 /* DCC_INFO ATTR */
 920 DCC_INFO_RW_ATTR(max_small_discards, max_discards);
 921 DCC_INFO_GENERAL_RW_ATTR(max_discard_request);
 922 DCC_INFO_GENERAL_RW_ATTR(min_discard_issue_time);
 923 DCC_INFO_GENERAL_RW_ATTR(mid_discard_issue_time);
 924 DCC_INFO_GENERAL_RW_ATTR(max_discard_issue_time);
 925 DCC_INFO_GENERAL_RW_ATTR(discard_io_aware_gran);
 926 DCC_INFO_GENERAL_RW_ATTR(discard_urgent_util);
 927 DCC_INFO_GENERAL_RW_ATTR(discard_granularity);
 928 DCC_INFO_GENERAL_RW_ATTR(max_ordered_discard);
 929
 930 /* NM_INFO ATTR */
 931 NM_INFO_RW_ATTR(max_roll_forward_node_blocks, max_rf_node_blocks);
 932 NM_INFO_GENERAL_RW_ATTR(ram_thresh);
 933 NM_INFO_GENERAL_RW_ATTR(ra_nid_pages);
 934 NM_INFO_GENERAL_RW_ATTR(dirty_nats_ratio);
 935
 936 /* F2FS_SBI ATTR */
 937 F2FS_RW_ATTR(F2FS_SBI, f2fs_super_block, extension_list, extension_list);
 938 F2FS_SBI_RW_ATTR(gc_idle, gc_mode);
 939 F2FS_SBI_RW_ATTR(gc_urgent, gc_mode);
 940 F2FS_SBI_RW_ATTR(cp_interval, interval_time[CP_TIME]);
 941 F2FS_SBI_RW_ATTR(idle_interval, interval_time[REQ_TIME]);
 942 F2FS_SBI_RW_ATTR(discard_idle_interval, interval_time[DISCARD_TIME]);
 943 F2FS_SBI_RW_ATTR(gc_idle_interval, interval_time[GC_TIME]);
 944 F2FS_SBI_RW_ATTR(umount_discard_timeout, interval_time[UMOUNT_DISCARD_TIMEOUT]);
 945 F2FS_SBI_RW_ATTR(gc_pin_file_thresh, gc_pin_file_threshold);
 946 F2FS_SBI_RW_ATTR(gc_reclaimed_segments, gc_reclaimed_segs);
 947 F2FS_SBI_GENERAL_RW_ATTR(max_victim_search);
 948 F2FS_SBI_GENERAL_RW_ATTR(migration_granularity);
 949 F2FS_SBI_GENERAL_RW_ATTR(dir_level);
 950 #ifdef CONFIG_F2FS_IOSTAT
 951 F2FS_SBI_GENERAL_RW_ATTR(iostat_enable);
 952 F2FS_SBI_GENERAL_RW_ATTR(iostat_period_ms);
 953 #endif
 954 F2FS_SBI_GENERAL_RW_ATTR(readdir_ra);
 955 F2FS_SBI_GENERAL_RW_ATTR(max_io_bytes);
 956 F2FS_SBI_GENERAL_RW_ATTR(data_io_flag);
 957 F2FS_SBI_GENERAL_RW_ATTR(node_io_flag);
 958 F2FS_SBI_GENERAL_RW_ATTR(gc_remaining_trials);
 959 F2FS_SBI_GENERAL_RW_ATTR(seq_file_ra_mul);
 960 F2FS_SBI_GENERAL_RW_ATTR(gc_segment_mode);
 961 F2FS_SBI_GENERAL_RW_ATTR(max_fragment_chunk);
 962 F2FS_SBI_GENERAL_RW_ATTR(max_fragment_hole);
 963 #ifdef CONFIG_F2FS_FS_COMPRESSION
 964 F2FS_SBI_GENERAL_RW_ATTR(compr_written_block);
 965 F2FS_SBI_GENERAL_RW_ATTR(compr_saved_block);
 966 F2FS_SBI_GENERAL_RW_ATTR(compr_new_inode);
 967 F2FS_SBI_GENERAL_RW_ATTR(compress_percent);
 968 F2FS_SBI_GENERAL_RW_ATTR(compress_watermark);
 969 #endif
 970 /* atomic write */
 971 F2FS_SBI_GENERAL_RO_ATTR(current_atomic_write);
 972 F2FS_SBI_GENERAL_RW_ATTR(peak_atomic_write);
 973 F2FS_SBI_GENERAL_RW_ATTR(committed_atomic_block);
 974 F2FS_SBI_GENERAL_RW_ATTR(revoked_atomic_block);
 975 /* block age extent cache */
 976 F2FS_SBI_GENERAL_RW_ATTR(hot_data_age_threshold);
 977 F2FS_SBI_GENERAL_RW_ATTR(warm_data_age_threshold);
 978 F2FS_SBI_GENERAL_RW_ATTR(last_age_weight);
 979 #ifdef CONFIG_BLK_DEV_ZONED
 980 F2FS_SBI_GENERAL_RO_ATTR(unusable_blocks_per_sec);
 981 #endif
 982
 983 /* STAT_INFO ATTR */
 984 #ifdef CONFIG_F2FS_STAT_FS
 985 STAT_INFO_RO_ATTR(cp_foreground_calls, cp_call_count[FOREGROUND]);
 986 STAT_INFO_RO_ATTR(cp_background_calls, cp_call_count[BACKGROUND]);
 987 STAT_INFO_RO_ATTR(gc_foreground_calls, gc_call_count[FOREGROUND]);
 988 STAT_INFO_RO_ATTR(gc_background_calls, gc_call_count[BACKGROUND]);
 989 #endif
 990
 991 /* FAULT_INFO ATTR */
 992 #ifdef CONFIG_F2FS_FAULT_INJECTION
 993 FAULT_INFO_GENERAL_RW_ATTR(FAULT_INFO_RATE, inject_rate);
 994 FAULT_INFO_GENERAL_RW_ATTR(FAULT_INFO_TYPE, inject_type);
 995 #endif
 996
 997 /* RESERVED_BLOCKS ATTR */
 998 RESERVED_BLOCKS_GENERAL_RW_ATTR(reserved_blocks);
 999
1000 /* CPRC_INFO ATTR */
1001 CPRC_INFO_GENERAL_RW_ATTR(ckpt_thread_ioprio);
1002
1003 /* ATGC_INFO ATTR */
1004 ATGC_INFO_RW_ATTR(atgc_candidate_ratio, candidate_ratio);
1005 ATGC_INFO_RW_ATTR(atgc_candidate_count, max_candidate_count);
1006 ATGC_INFO_RW_ATTR(atgc_age_weight, age_weight);
1007 ATGC_INFO_RW_ATTR(atgc_age_threshold, age_threshold);
1008
1009 F2FS_GENERAL_RO_ATTR(dirty_segments);
1010 F2FS_GENERAL_RO_ATTR(free_segments);
1011 F2FS_GENERAL_RO_ATTR(ovp_segments);
1012 F2FS_GENERAL_RO_ATTR(lifetime_write_kbytes);
1013 F2FS_GENERAL_RO_ATTR(features);
1014 F2FS_GENERAL_RO_ATTR(current_reserved_blocks);
1015 F2FS_GENERAL_RO_ATTR(unusable);
1016 F2FS_GENERAL_RO_ATTR(encoding);
1017 F2FS_GENERAL_RO_ATTR(mounted_time_sec);
1018 F2FS_GENERAL_RO_ATTR(main_blkaddr);
1019 F2FS_GENERAL_RO_ATTR(pending_discard);
1020 F2FS_GENERAL_RO_ATTR(gc_mode);
1021 #ifdef CONFIG_F2FS_STAT_FS
1022 F2FS_GENERAL_RO_ATTR(moved_blocks_background);
1023 F2FS_GENERAL_RO_ATTR(moved_blocks_foreground);
1024 F2FS_GENERAL_RO_ATTR(avg_vblocks);
1025 #endif
1026
1027 #ifdef CONFIG_FS_ENCRYPTION
1028 F2FS_FEATURE_RO_ATTR(encryption);
1029 F2FS_FEATURE_RO_ATTR(test_dummy_encryption_v2);
1030 #if IS_ENABLED(CONFIG_UNICODE)
1031 F2FS_FEATURE_RO_ATTR(encrypted_casefold);
1032 #endif
1033 #endif /* CONFIG_FS_ENCRYPTION */
1034 #ifdef CONFIG_BLK_DEV_ZONED
1035 F2FS_FEATURE_RO_ATTR(block_zoned);
1036 #endif
1037 F2FS_FEATURE_RO_ATTR(atomic_write);
1038 F2FS_FEATURE_RO_ATTR(extra_attr);
1039 F2FS_FEATURE_RO_ATTR(project_quota);
1040 F2FS_FEATURE_RO_ATTR(inode_checksum);
1041 F2FS_FEATURE_RO_ATTR(flexible_inline_xattr);
1042 F2FS_FEATURE_RO_ATTR(quota_ino);
1043 F2FS_FEATURE_RO_ATTR(inode_crtime);
1044 F2FS_FEATURE_RO_ATTR(lost_found);
1045 #ifdef CONFIG_FS_VERITY
1046 F2FS_FEATURE_RO_ATTR(verity);
1047 #endif
1048 F2FS_FEATURE_RO_ATTR(sb_checksum);
1049 #if IS_ENABLED(CONFIG_UNICODE)
1050 F2FS_FEATURE_RO_ATTR(casefold);
1051 #endif
1052 F2FS_FEATURE_RO_ATTR(readonly);
1053 #ifdef CONFIG_F2FS_FS_COMPRESSION
1054 F2FS_FEATURE_RO_ATTR(compression);
1055 #endif
1056 F2FS_FEATURE_RO_ATTR(pin_file);
1057
1058 #define ATTR_LIST(name) (&f2fs_attr_##name.attr)
1059 static struct attribute *f2fs_attrs[] = {
1060         ATTR_LIST(gc_urgent_sleep_time),
1061         ATTR_LIST(gc_min_sleep_time),
1062         ATTR_LIST(gc_max_sleep_time),
1063         ATTR_LIST(gc_no_gc_sleep_time),
1064         ATTR_LIST(gc_idle),
1065         ATTR_LIST(gc_urgent),
1066         ATTR_LIST(reclaim_segments),
1067         ATTR_LIST(main_blkaddr),
1068         ATTR_LIST(max_small_discards),
1069         ATTR_LIST(max_discard_request),
1070         ATTR_LIST(min_discard_issue_time),
1071         ATTR_LIST(mid_discard_issue_time),
1072         ATTR_LIST(max_discard_issue_time),
1073         ATTR_LIST(discard_io_aware_gran),
1074         ATTR_LIST(discard_urgent_util),
1075         ATTR_LIST(discard_granularity),
1076         ATTR_LIST(max_ordered_discard),
1077         ATTR_LIST(pending_discard),
1078         ATTR_LIST(gc_mode),
1079         ATTR_LIST(ipu_policy),
1080         ATTR_LIST(min_ipu_util),
1081         ATTR_LIST(min_fsync_blocks),
1082         ATTR_LIST(min_seq_blocks),
1083         ATTR_LIST(min_hot_blocks),
1084         ATTR_LIST(min_ssr_sections),
1085         ATTR_LIST(max_victim_search),
1086         ATTR_LIST(migration_granularity),
1087         ATTR_LIST(dir_level),
1088         ATTR_LIST(ram_thresh),
1089         ATTR_LIST(ra_nid_pages),
1090         ATTR_LIST(dirty_nats_ratio),
1091         ATTR_LIST(max_roll_forward_node_blocks),
1092         ATTR_LIST(cp_interval),
1093         ATTR_LIST(idle_interval),
1094         ATTR_LIST(discard_idle_interval),
1095         ATTR_LIST(gc_idle_interval),
1096         ATTR_LIST(umount_discard_timeout),
1097 #ifdef CONFIG_F2FS_IOSTAT
1098         ATTR_LIST(iostat_enable),
1099         ATTR_LIST(iostat_period_ms),
1100 #endif
1101         ATTR_LIST(readdir_ra),
1102         ATTR_LIST(max_io_bytes),
1103         ATTR_LIST(gc_pin_file_thresh),
1104         ATTR_LIST(extension_list),
1105 #ifdef CONFIG_F2FS_FAULT_INJECTION
1106         ATTR_LIST(inject_rate),
1107         ATTR_LIST(inject_type),
1108 #endif
1109         ATTR_LIST(data_io_flag),
1110         ATTR_LIST(node_io_flag),
1111         ATTR_LIST(gc_remaining_trials),
1112         ATTR_LIST(ckpt_thread_ioprio),
1113         ATTR_LIST(dirty_segments),
1114         ATTR_LIST(free_segments),
1115         ATTR_LIST(ovp_segments),
1116         ATTR_LIST(unusable),
1117         ATTR_LIST(lifetime_write_kbytes),
1118         ATTR_LIST(features),
1119         ATTR_LIST(reserved_blocks),
1120         ATTR_LIST(current_reserved_blocks),
1121         ATTR_LIST(encoding),
1122         ATTR_LIST(mounted_time_sec),
1123 #ifdef CONFIG_F2FS_STAT_FS
1124         ATTR_LIST(cp_foreground_calls),
1125         ATTR_LIST(cp_background_calls),
1126         ATTR_LIST(gc_foreground_calls),
1127         ATTR_LIST(gc_background_calls),
1128         ATTR_LIST(moved_blocks_foreground),
1129         ATTR_LIST(moved_blocks_background),
1130         ATTR_LIST(avg_vblocks),
1131 #endif
1132 #ifdef CONFIG_BLK_DEV_ZONED
1133         ATTR_LIST(unusable_blocks_per_sec),
1134 #endif
1135 #ifdef CONFIG_F2FS_FS_COMPRESSION
1136         ATTR_LIST(compr_written_block),
1137         ATTR_LIST(compr_saved_block),
1138         ATTR_LIST(compr_new_inode),
1139         ATTR_LIST(compress_percent),
1140         ATTR_LIST(compress_watermark),
1141 #endif
1142         /* For ATGC */
1143         ATTR_LIST(atgc_candidate_ratio),
1144         ATTR_LIST(atgc_candidate_count),
1145         ATTR_LIST(atgc_age_weight),
1146         ATTR_LIST(atgc_age_threshold),
1147         ATTR_LIST(seq_file_ra_mul),
1148         ATTR_LIST(gc_segment_mode),
1149         ATTR_LIST(gc_reclaimed_segments),
1150         ATTR_LIST(max_fragment_chunk),
1151         ATTR_LIST(max_fragment_hole),
1152         ATTR_LIST(current_atomic_write),
1153         ATTR_LIST(peak_atomic_write),
1154         ATTR_LIST(committed_atomic_block),
1155         ATTR_LIST(revoked_atomic_block),
1156         ATTR_LIST(hot_data_age_threshold),
1157         ATTR_LIST(warm_data_age_threshold),
1158         ATTR_LIST(last_age_weight),
1159         NULL,
1160 };
1161 ATTRIBUTE_GROUPS(f2fs);
1162
1163 static struct attribute *f2fs_feat_attrs[] = {
1164 #ifdef CONFIG_FS_ENCRYPTION
1165         ATTR_LIST(encryption),
1166         ATTR_LIST(test_dummy_encryption_v2),
1167 #if IS_ENABLED(CONFIG_UNICODE)
1168         ATTR_LIST(encrypted_casefold),
1169 #endif
1170 #endif /* CONFIG_FS_ENCRYPTION */
1171 #ifdef CONFIG_BLK_DEV_ZONED
1172         ATTR_LIST(block_zoned),
1173 #endif
1174         ATTR_LIST(atomic_write),
1175         ATTR_LIST(extra_attr),
1176         ATTR_LIST(project_quota),
1177         ATTR_LIST(inode_checksum),
1178         ATTR_LIST(flexible_inline_xattr),
1179         ATTR_LIST(quota_ino),
1180         ATTR_LIST(inode_crtime),
1181         ATTR_LIST(lost_found),
1182 #ifdef CONFIG_FS_VERITY
1183         ATTR_LIST(verity),
1184 #endif
1185         ATTR_LIST(sb_checksum),
1186 #if IS_ENABLED(CONFIG_UNICODE)
1187         ATTR_LIST(casefold),
1188 #endif
1189         ATTR_LIST(readonly),
1190 #ifdef CONFIG_F2FS_FS_COMPRESSION
1191         ATTR_LIST(compression),
1192 #endif
1193         ATTR_LIST(pin_file),
1194         NULL,
1195 };
1196 ATTRIBUTE_GROUPS(f2fs_feat);
1197
1198 F2FS_GENERAL_RO_ATTR(sb_status);
1199 F2FS_GENERAL_RO_ATTR(cp_status);
1200 static struct attribute *f2fs_stat_attrs[] = {
1201         ATTR_LIST(sb_status),
1202         ATTR_LIST(cp_status),
1203         NULL,
1204 };
1205 ATTRIBUTE_GROUPS(f2fs_stat);
1206
1207 F2FS_SB_FEATURE_RO_ATTR(encryption, ENCRYPT);
1208 F2FS_SB_FEATURE_RO_ATTR(block_zoned, BLKZONED);
1209 F2FS_SB_FEATURE_RO_ATTR(extra_attr, EXTRA_ATTR);
1210 F2FS_SB_FEATURE_RO_ATTR(project_quota, PRJQUOTA);
1211 F2FS_SB_FEATURE_RO_ATTR(inode_checksum, INODE_CHKSUM);
1212 F2FS_SB_FEATURE_RO_ATTR(flexible_inline_xattr, FLEXIBLE_INLINE_XATTR);
1213 F2FS_SB_FEATURE_RO_ATTR(quota_ino, QUOTA_INO);
1214 F2FS_SB_FEATURE_RO_ATTR(inode_crtime, INODE_CRTIME);
1215 F2FS_SB_FEATURE_RO_ATTR(lost_found, LOST_FOUND);
1216 F2FS_SB_FEATURE_RO_ATTR(verity, VERITY);
1217 F2FS_SB_FEATURE_RO_ATTR(sb_checksum, SB_CHKSUM);
1218 F2FS_SB_FEATURE_RO_ATTR(casefold, CASEFOLD);
1219 F2FS_SB_FEATURE_RO_ATTR(compression, COMPRESSION);
1220 F2FS_SB_FEATURE_RO_ATTR(readonly, RO);
1221
1222 static struct attribute *f2fs_sb_feat_attrs[] = {
1223         ATTR_LIST(sb_encryption),
1224         ATTR_LIST(sb_block_zoned),
1225         ATTR_LIST(sb_extra_attr),
1226         ATTR_LIST(sb_project_quota),
1227         ATTR_LIST(sb_inode_checksum),
1228         ATTR_LIST(sb_flexible_inline_xattr),
1229         ATTR_LIST(sb_quota_ino),
1230         ATTR_LIST(sb_inode_crtime),
1231         ATTR_LIST(sb_lost_found),
1232         ATTR_LIST(sb_verity),
1233         ATTR_LIST(sb_sb_checksum),
1234         ATTR_LIST(sb_casefold),
1235         ATTR_LIST(sb_compression),
1236         ATTR_LIST(sb_readonly),
1237         NULL,
1238 };
1239 ATTRIBUTE_GROUPS(f2fs_sb_feat);
1240
1241 static const struct sysfs_ops f2fs_attr_ops = {
1242         .show   = f2fs_attr_show,
1243         .store  = f2fs_attr_store,
1244 };
1245
1246 static const struct kobj_type f2fs_sb_ktype = {
1247         .default_groups = f2fs_groups,
1248         .sysfs_ops      = &f2fs_attr_ops,
1249         .release        = f2fs_sb_release,
1250 };
1251
1252 static const struct kobj_type f2fs_ktype = {
1253         .sysfs_ops      = &f2fs_attr_ops,
1254 };
1255
1256 static struct kset f2fs_kset = {
1257         .kobj   = {.ktype = &f2fs_ktype},
1258 };
1259
1260 static const struct kobj_type f2fs_feat_ktype = {
1261         .default_groups = f2fs_feat_groups,
1262         .sysfs_ops      = &f2fs_attr_ops,
1263 };
1264
1265 static struct kobject f2fs_feat = {
1266         .kset   = &f2fs_kset,
1267 };
1268
1269 static ssize_t f2fs_stat_attr_show(struct kobject *kobj,
1270                                 struct attribute *attr, char *buf)
1271 {
1272         struct f2fs_sb_info *sbi = container_of(kobj, struct f2fs_sb_info,
1273                                                                 s_stat_kobj);
1274         struct f2fs_attr *a = container_of(attr, struct f2fs_attr, attr);
1275
1276         return a->show ? a->show(a, sbi, buf) : 0;
1277 }
1278
1279 static ssize_t f2fs_stat_attr_store(struct kobject *kobj, struct attribute *attr,
1280                                                 const char *buf, size_t len)
1281 {
1282         struct f2fs_sb_info *sbi = container_of(kobj, struct f2fs_sb_info,
1283                                                                 s_stat_kobj);
1284         struct f2fs_attr *a = container_of(attr, struct f2fs_attr, attr);
1285
1286         return a->store ? a->store(a, sbi, buf, len) : 0;
1287 }
1288
1289 static void f2fs_stat_kobj_release(struct kobject *kobj)
1290 {
1291         struct f2fs_sb_info *sbi = container_of(kobj, struct f2fs_sb_info,
1292                                                                 s_stat_kobj);
1293         complete(&sbi->s_stat_kobj_unregister);
1294 }
1295
1296 static const struct sysfs_ops f2fs_stat_attr_ops = {
1297         .show   = f2fs_stat_attr_show,
1298         .store  = f2fs_stat_attr_store,
1299 };
1300
1301 static const struct kobj_type f2fs_stat_ktype = {
1302         .default_groups = f2fs_stat_groups,
1303         .sysfs_ops      = &f2fs_stat_attr_ops,
1304         .release        = f2fs_stat_kobj_release,
1305 };
1306
1307 static ssize_t f2fs_sb_feat_attr_show(struct kobject *kobj,
1308                                 struct attribute *attr, char *buf)
1309 {
1310         struct f2fs_sb_info *sbi = container_of(kobj, struct f2fs_sb_info,
1311                                                         s_feature_list_kobj);
1312         struct f2fs_attr *a = container_of(attr, struct f2fs_attr, attr);
1313
1314         return a->show ? a->show(a, sbi, buf) : 0;
1315 }
1316
1317 static void f2fs_feature_list_kobj_release(struct kobject *kobj)
1318 {
1319         struct f2fs_sb_info *sbi = container_of(kobj, struct f2fs_sb_info,
1320                                                         s_feature_list_kobj);
1321         complete(&sbi->s_feature_list_kobj_unregister);
1322 }
1323
1324 static const struct sysfs_ops f2fs_feature_list_attr_ops = {
1325         .show   = f2fs_sb_feat_attr_show,
1326 };
1327
1328 static const struct kobj_type f2fs_feature_list_ktype = {
1329         .default_groups = f2fs_sb_feat_groups,
1330         .sysfs_ops      = &f2fs_feature_list_attr_ops,
1331         .release        = f2fs_feature_list_kobj_release,
1332 };
1333
1334 static int __maybe_unused segment_info_seq_show(struct seq_file *seq,
1335                                                 void *offset)
1336 {
1337         struct super_block *sb = seq->private;
1338         struct f2fs_sb_info *sbi = F2FS_SB(sb);
1339         unsigned int total_segs =
1340                         le32_to_cpu(sbi->raw_super->segment_count_main);
1341         int i;
1342
1343         seq_puts(seq, "format: segment_type|valid_blocks\n"
1344                 "segment_type(0:HD, 1:WD, 2:CD, 3:HN, 4:WN, 5:CN)\n");
1345
1346         for (i = 0; i < total_segs; i++) {
1347                 struct seg_entry *se = get_seg_entry(sbi, i);
1348
1349                 if ((i % 10) == 0)
1350                         seq_printf(seq, "%-10d", i);
1351                 seq_printf(seq, "%d|%-3u", se->type, se->valid_blocks);
1352                 if ((i % 10) == 9 || i == (total_segs - 1))
1353                         seq_putc(seq, '\n');
1354                 else
1355                         seq_putc(seq, ' ');
1356         }
1357
1358         return 0;
1359 }
1360
1361 static int __maybe_unused segment_bits_seq_show(struct seq_file *seq,
1362                                                 void *offset)
1363 {
1364         struct super_block *sb = seq->private;
1365         struct f2fs_sb_info *sbi = F2FS_SB(sb);
1366         unsigned int total_segs =
1367                         le32_to_cpu(sbi->raw_super->segment_count_main);
1368         int i, j;
1369
1370         seq_puts(seq, "format: segment_type|valid_blocks|bitmaps\n"
1371                 "segment_type(0:HD, 1:WD, 2:CD, 3:HN, 4:WN, 5:CN)\n");
1372
1373         for (i = 0; i < total_segs; i++) {
1374                 struct seg_entry *se = get_seg_entry(sbi, i);
1375
1376                 seq_printf(seq, "%-10d", i);
1377                 seq_printf(seq, "%d|%-3u|", se->type, se->valid_blocks);
1378                 for (j = 0; j < SIT_VBLOCK_MAP_SIZE; j++)
1379                         seq_printf(seq, " %.2x", se->cur_valid_map[j]);
1380                 seq_putc(seq, '\n');
1381         }
1382         return 0;
1383 }
1384
1385 static int __maybe_unused victim_bits_seq_show(struct seq_file *seq,
1386                                                 void *offset)
1387 {
1388         struct super_block *sb = seq->private;
1389         struct f2fs_sb_info *sbi = F2FS_SB(sb);
1390         struct dirty_seglist_info *dirty_i = DIRTY_I(sbi);
1391         int i;
1392
1393         seq_puts(seq, "format: victim_secmap bitmaps\n");
1394
1395         for (i = 0; i < MAIN_SECS(sbi); i++) {
1396                 if ((i % 10) == 0)
1397                         seq_printf(seq, "%-10d", i);
1398                 seq_printf(seq, "%d", test_bit(i, dirty_i->victim_secmap) ? 1 : 0);
1399                 if ((i % 10) == 9 || i == (MAIN_SECS(sbi) - 1))
1400                         seq_putc(seq, '\n');
1401                 else
1402                         seq_putc(seq, ' ');
1403         }
1404         return 0;
1405 }
1406
1407 static int __maybe_unused discard_plist_seq_show(struct seq_file *seq,
1408                                                 void *offset)
1409 {
1410         struct super_block *sb = seq->private;
1411         struct f2fs_sb_info *sbi = F2FS_SB(sb);
1412         struct discard_cmd_control *dcc = SM_I(sbi)->dcc_info;
1413         int i, count;
1414
1415         seq_puts(seq, "Discard pend list(Show diacrd_cmd count on each entry, .:not exist):\n");
1416         if (!f2fs_realtime_discard_enable(sbi))
1417                 return 0;
1418
1419         if (dcc) {
1420                 mutex_lock(&dcc->cmd_lock);
1421                 for (i = 0; i < MAX_PLIST_NUM; i++) {
1422                         struct list_head *pend_list;
1423                         struct discard_cmd *dc, *tmp;
1424
1425                         if (i % 8 == 0)
1426                                 seq_printf(seq, "  %-3d", i);
1427                         count = 0;
1428                         pend_list = &dcc->pend_list[i];
1429                         list_for_each_entry_safe(dc, tmp, pend_list, list)
1430                                 count++;
1431                         if (count)
1432                                 seq_printf(seq, " %7d", count);
1433                         else
1434                                 seq_puts(seq, "       .");
1435                         if (i % 8 == 7)
1436                                 seq_putc(seq, '\n');
1437                 }
1438                 seq_putc(seq, '\n');
1439                 mutex_unlock(&dcc->cmd_lock);
1440         }
1441
1442         return 0;
1443 }
1444
1445 int __init f2fs_init_sysfs(void)
1446 {
1447         int ret;
1448
1449         kobject_set_name(&f2fs_kset.kobj, "f2fs");
1450         f2fs_kset.kobj.parent = fs_kobj;
1451         ret = kset_register(&f2fs_kset);
1452         if (ret)
1453                 return ret;
1454
1455         ret = kobject_init_and_add(&f2fs_feat, &f2fs_feat_ktype,
1456                                    NULL, "features");
1457         if (ret)
1458                 goto put_kobject;
1459
1460         f2fs_proc_root = proc_mkdir("fs/f2fs", NULL);
1461         if (!f2fs_proc_root) {
1462                 ret = -ENOMEM;
1463                 goto put_kobject;
1464         }
1465
1466         return 0;
1467 put_kobject:
1468         kobject_put(&f2fs_feat);
1469         kset_unregister(&f2fs_kset);
1470         return ret;
1471 }
1472
1473 void f2fs_exit_sysfs(void)
1474 {
1475         kobject_put(&f2fs_feat);
1476         kset_unregister(&f2fs_kset);
1477         remove_proc_entry("fs/f2fs", NULL);
1478         f2fs_proc_root = NULL;
1479 }
1480
1481 int f2fs_register_sysfs(struct f2fs_sb_info *sbi)
1482 {
1483         struct super_block *sb = sbi->sb;
1484         int err;
1485
1486         sbi->s_kobj.kset = &f2fs_kset;
1487         init_completion(&sbi->s_kobj_unregister);
1488         err = kobject_init_and_add(&sbi->s_kobj, &f2fs_sb_ktype, NULL,
1489                                 "%s", sb->s_id);
1490         if (err)
1491                 goto put_sb_kobj;
1492
1493         sbi->s_stat_kobj.kset = &f2fs_kset;
1494         init_completion(&sbi->s_stat_kobj_unregister);
1495         err = kobject_init_and_add(&sbi->s_stat_kobj, &f2fs_stat_ktype,
1496                                                 &sbi->s_kobj, "stat");
1497         if (err)
1498                 goto put_stat_kobj;
1499
1500         sbi->s_feature_list_kobj.kset = &f2fs_kset;
1501         init_completion(&sbi->s_feature_list_kobj_unregister);
1502         err = kobject_init_and_add(&sbi->s_feature_list_kobj,
1503                                         &f2fs_feature_list_ktype,
1504                                         &sbi->s_kobj, "feature_list");
1505         if (err)
1506                 goto put_feature_list_kobj;
1507
1508         sbi->s_proc = proc_mkdir(sb->s_id, f2fs_proc_root);
1509         if (!sbi->s_proc) {
1510                 err = -ENOMEM;
1511                 goto put_feature_list_kobj;
1512         }
1513
1514         proc_create_single_data("segment_info", 0444, sbi->s_proc,
1515                                 segment_info_seq_show, sb);
1516         proc_create_single_data("segment_bits", 0444, sbi->s_proc,
1517                                 segment_bits_seq_show, sb);
1518 #ifdef CONFIG_F2FS_IOSTAT
1519         proc_create_single_data("iostat_info", 0444, sbi->s_proc,
1520                                 iostat_info_seq_show, sb);
1521 #endif
1522         proc_create_single_data("victim_bits", 0444, sbi->s_proc,
1523                                 victim_bits_seq_show, sb);
1524         proc_create_single_data("discard_plist_info", 0444, sbi->s_proc,
1525                                 discard_plist_seq_show, sb);
1526         return 0;
1527 put_feature_list_kobj:
1528         kobject_put(&sbi->s_feature_list_kobj);
1529         wait_for_completion(&sbi->s_feature_list_kobj_unregister);
1530 put_stat_kobj:
1531         kobject_put(&sbi->s_stat_kobj);
1532         wait_for_completion(&sbi->s_stat_kobj_unregister);
1533 put_sb_kobj:
1534         kobject_put(&sbi->s_kobj);
1535         wait_for_completion(&sbi->s_kobj_unregister);
1536         return err;
1537 }
1538
1539 void f2fs_unregister_sysfs(struct f2fs_sb_info *sbi)
1540 {
1541         remove_proc_subtree(sbi->sb->s_id, f2fs_proc_root);
1542
1543         kobject_put(&sbi->s_stat_kobj);
1544         wait_for_completion(&sbi->s_stat_kobj_unregister);
1545         kobject_put(&sbi->s_feature_list_kobj);
1546         wait_for_completion(&sbi->s_feature_list_kobj_unregister);
1547
1548         kobject_put(&sbi->s_kobj);
1549         wait_for_completion(&sbi->s_kobj_unregister);
1550 }