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
  15 #include "f2fs.h"
  16 #include "segment.h"
  17 #include "gc.h"
  18
  19 static struct proc_dir_entry *f2fs_proc_root;
  20
  21 /* Sysfs support for f2fs */
  22 enum {
  23         GC_THREAD,      /* struct f2fs_gc_thread */
  24         SM_INFO,        /* struct f2fs_sm_info */
  25         DCC_INFO,       /* struct discard_cmd_control */
  26         NM_INFO,        /* struct f2fs_nm_info */
  27         F2FS_SBI,       /* struct f2fs_sb_info */
  28 #ifdef CONFIG_F2FS_FAULT_INJECTION
  29         FAULT_INFO_RATE,        /* struct f2fs_fault_info */
  30         FAULT_INFO_TYPE,        /* struct f2fs_fault_info */
  31 #endif
  32         RESERVED_BLOCKS,        /* struct f2fs_sb_info */
  33 };
  34
  35 struct f2fs_attr {
  36         struct attribute attr;
  37         ssize_t (*show)(struct f2fs_attr *, struct f2fs_sb_info *, char *);
  38         ssize_t (*store)(struct f2fs_attr *, struct f2fs_sb_info *,
  39                          const char *, size_t);
  40         int struct_type;
  41         int offset;
  42         int id;
  43 };
  44
  45 static unsigned char *__struct_ptr(struct f2fs_sb_info *sbi, int struct_type)
  46 {
  47         if (struct_type == GC_THREAD)
  48                 return (unsigned char *)sbi->gc_thread;
  49         else if (struct_type == SM_INFO)
  50                 return (unsigned char *)SM_I(sbi);
  51         else if (struct_type == DCC_INFO)
  52                 return (unsigned char *)SM_I(sbi)->dcc_info;
  53         else if (struct_type == NM_INFO)
  54                 return (unsigned char *)NM_I(sbi);
  55         else if (struct_type == F2FS_SBI || struct_type == RESERVED_BLOCKS)
  56                 return (unsigned char *)sbi;
  57 #ifdef CONFIG_F2FS_FAULT_INJECTION
  58         else if (struct_type == FAULT_INFO_RATE ||
  59                                         struct_type == FAULT_INFO_TYPE)
  60                 return (unsigned char *)&F2FS_OPTION(sbi).fault_info;
  61 #endif
  62         return NULL;
  63 }
  64
  65 static ssize_t dirty_segments_show(struct f2fs_attr *a,
  66                 struct f2fs_sb_info *sbi, char *buf)
  67 {
  68         return snprintf(buf, PAGE_SIZE, "%llu\n",
  69                 (unsigned long long)(dirty_segments(sbi)));
  70 }
  71
  72 static ssize_t unusable_show(struct f2fs_attr *a,
  73                 struct f2fs_sb_info *sbi, char *buf)
  74 {
  75         block_t unusable;
  76
  77         if (test_opt(sbi, DISABLE_CHECKPOINT))
  78                 unusable = sbi->unusable_block_count;
  79         else
  80                 unusable = f2fs_get_unusable_blocks(sbi);
  81         return snprintf(buf, PAGE_SIZE, "%llu\n",
  82                 (unsigned long long)unusable);
  83 }
  84
  85 static ssize_t encoding_show(struct f2fs_attr *a,
  86                 struct f2fs_sb_info *sbi, char *buf)
  87 {
  88 #ifdef CONFIG_UNICODE
  89         if (f2fs_sb_has_casefold(sbi))
  90                 return snprintf(buf, PAGE_SIZE, "%s (%d.%d.%d)\n",
  91                         sbi->s_encoding->charset,
  92                         (sbi->s_encoding->version >> 16) & 0xff,
  93                         (sbi->s_encoding->version >> 8) & 0xff,
  94                         sbi->s_encoding->version & 0xff);
  95 #endif
  96         return snprintf(buf, PAGE_SIZE, "(none)");
  97 }
  98
  99 static ssize_t lifetime_write_kbytes_show(struct f2fs_attr *a,
 100                 struct f2fs_sb_info *sbi, char *buf)
 101 {
 102         struct super_block *sb = sbi->sb;
 103
 104         if (!sb->s_bdev->bd_part)
 105                 return snprintf(buf, PAGE_SIZE, "0\n");
 106
 107         return snprintf(buf, PAGE_SIZE, "%llu\n",
 108                 (unsigned long long)(sbi->kbytes_written +
 109                         BD_PART_WRITTEN(sbi)));
 110 }
 111
 112 static ssize_t features_show(struct f2fs_attr *a,
 113                 struct f2fs_sb_info *sbi, char *buf)
 114 {
 115         struct super_block *sb = sbi->sb;
 116         int len = 0;
 117
 118         if (!sb->s_bdev->bd_part)
 119                 return snprintf(buf, PAGE_SIZE, "0\n");
 120
 121         if (f2fs_sb_has_encrypt(sbi))
 122                 len += snprintf(buf, PAGE_SIZE - len, "%s",
 123                                                 "encryption");
 124         if (f2fs_sb_has_blkzoned(sbi))
 125                 len += snprintf(buf + len, PAGE_SIZE - len, "%s%s",
 126                                 len ? ", " : "", "blkzoned");
 127         if (f2fs_sb_has_extra_attr(sbi))
 128                 len += snprintf(buf + len, PAGE_SIZE - len, "%s%s",
 129                                 len ? ", " : "", "extra_attr");
 130         if (f2fs_sb_has_project_quota(sbi))
 131                 len += snprintf(buf + len, PAGE_SIZE - len, "%s%s",
 132                                 len ? ", " : "", "projquota");
 133         if (f2fs_sb_has_inode_chksum(sbi))
 134                 len += snprintf(buf + len, PAGE_SIZE - len, "%s%s",
 135                                 len ? ", " : "", "inode_checksum");
 136         if (f2fs_sb_has_flexible_inline_xattr(sbi))
 137                 len += snprintf(buf + len, PAGE_SIZE - len, "%s%s",
 138                                 len ? ", " : "", "flexible_inline_xattr");
 139         if (f2fs_sb_has_quota_ino(sbi))
 140                 len += snprintf(buf + len, PAGE_SIZE - len, "%s%s",
 141                                 len ? ", " : "", "quota_ino");
 142         if (f2fs_sb_has_inode_crtime(sbi))
 143                 len += snprintf(buf + len, PAGE_SIZE - len, "%s%s",
 144                                 len ? ", " : "", "inode_crtime");
 145         if (f2fs_sb_has_lost_found(sbi))
 146                 len += snprintf(buf + len, PAGE_SIZE - len, "%s%s",
 147                                 len ? ", " : "", "lost_found");
 148         if (f2fs_sb_has_sb_chksum(sbi))
 149                 len += snprintf(buf + len, PAGE_SIZE - len, "%s%s",
 150                                 len ? ", " : "", "sb_checksum");
 151         if (f2fs_sb_has_casefold(sbi))
 152                 len += snprintf(buf + len, PAGE_SIZE - len, "%s%s",
 153                                 len ? ", " : "", "casefold");
 154         len += snprintf(buf + len, PAGE_SIZE - len, "\n");
 155         return len;
 156 }
 157
 158 static ssize_t current_reserved_blocks_show(struct f2fs_attr *a,
 159                                         struct f2fs_sb_info *sbi, char *buf)
 160 {
 161         return snprintf(buf, PAGE_SIZE, "%u\n", sbi->current_reserved_blocks);
 162 }
 163
 164 static ssize_t f2fs_sbi_show(struct f2fs_attr *a,
 165                         struct f2fs_sb_info *sbi, char *buf)
 166 {
 167         unsigned char *ptr = NULL;
 168         unsigned int *ui;
 169
 170         ptr = __struct_ptr(sbi, a->struct_type);
 171         if (!ptr)
 172                 return -EINVAL;
 173
 174         if (!strcmp(a->attr.name, "extension_list")) {
 175                 __u8 (*extlist)[F2FS_EXTENSION_LEN] =
 176                                         sbi->raw_super->extension_list;
 177                 int cold_count = le32_to_cpu(sbi->raw_super->extension_count);
 178                 int hot_count = sbi->raw_super->hot_ext_count;
 179                 int len = 0, i;
 180
 181                 len += snprintf(buf + len, PAGE_SIZE - len,
 182                                                 "cold file extension:\n");
 183                 for (i = 0; i < cold_count; i++)
 184                         len += snprintf(buf + len, PAGE_SIZE - len, "%s\n",
 185                                                                 extlist[i]);
 186
 187                 len += snprintf(buf + len, PAGE_SIZE - len,
 188                                                 "hot file extension:\n");
 189                 for (i = cold_count; i < cold_count + hot_count; i++)
 190                         len += snprintf(buf + len, PAGE_SIZE - len, "%s\n",
 191                                                                 extlist[i]);
 192                 return len;
 193         }
 194
 195         ui = (unsigned int *)(ptr + a->offset);
 196
 197         return snprintf(buf, PAGE_SIZE, "%u\n", *ui);
 198 }
 199
 200 static ssize_t __sbi_store(struct f2fs_attr *a,
 201                         struct f2fs_sb_info *sbi,
 202                         const char *buf, size_t count)
 203 {
 204         unsigned char *ptr;
 205         unsigned long t;
 206         unsigned int *ui;
 207         ssize_t ret;
 208
 209         ptr = __struct_ptr(sbi, a->struct_type);
 210         if (!ptr)
 211                 return -EINVAL;
 212
 213         if (!strcmp(a->attr.name, "extension_list")) {
 214                 const char *name = strim((char *)buf);
 215                 bool set = true, hot;
 216
 217                 if (!strncmp(name, "[h]", 3))
 218                         hot = true;
 219                 else if (!strncmp(name, "[c]", 3))
 220                         hot = false;
 221                 else
 222                         return -EINVAL;
 223
 224                 name += 3;
 225
 226                 if (*name == '!') {
 227                         name++;
 228                         set = false;
 229                 }
 230
 231                 if (strlen(name) >= F2FS_EXTENSION_LEN)
 232                         return -EINVAL;
 233
 234                 down_write(&sbi->sb_lock);
 235
 236                 ret = f2fs_update_extension_list(sbi, name, hot, set);
 237                 if (ret)
 238                         goto out;
 239
 240                 ret = f2fs_commit_super(sbi, false);
 241                 if (ret)
 242                         f2fs_update_extension_list(sbi, name, hot, !set);
 243 out:
 244                 up_write(&sbi->sb_lock);
 245                 return ret ? ret : count;
 246         }
 247
 248         ui = (unsigned int *)(ptr + a->offset);
 249
 250         ret = kstrtoul(skip_spaces(buf), 0, &t);
 251         if (ret < 0)
 252                 return ret;
 253 #ifdef CONFIG_F2FS_FAULT_INJECTION
 254         if (a->struct_type == FAULT_INFO_TYPE && t >= (1 << FAULT_MAX))
 255                 return -EINVAL;
 256         if (a->struct_type == FAULT_INFO_RATE && t >= UINT_MAX)
 257                 return -EINVAL;
 258 #endif
 259         if (a->struct_type == RESERVED_BLOCKS) {
 260                 spin_lock(&sbi->stat_lock);
 261                 if (t > (unsigned long)(sbi->user_block_count -
 262                                 F2FS_OPTION(sbi).root_reserved_blocks)) {
 263                         spin_unlock(&sbi->stat_lock);
 264                         return -EINVAL;
 265                 }
 266                 *ui = t;
 267                 sbi->current_reserved_blocks = min(sbi->reserved_blocks,
 268                                 sbi->user_block_count - valid_user_blocks(sbi));
 269                 spin_unlock(&sbi->stat_lock);
 270                 return count;
 271         }
 272
 273         if (!strcmp(a->attr.name, "discard_granularity")) {
 274                 if (t == 0 || t > MAX_PLIST_NUM)
 275                         return -EINVAL;
 276                 if (t == *ui)
 277                         return count;
 278                 *ui = t;
 279                 return count;
 280         }
 281
 282         if (!strcmp(a->attr.name, "migration_granularity")) {
 283                 if (t == 0 || t > sbi->segs_per_sec)
 284                         return -EINVAL;
 285         }
 286
 287         if (!strcmp(a->attr.name, "trim_sections"))
 288                 return -EINVAL;
 289
 290         if (!strcmp(a->attr.name, "gc_urgent")) {
 291                 if (t >= 1) {
 292                         sbi->gc_mode = GC_URGENT;
 293                         if (sbi->gc_thread) {
 294                                 sbi->gc_thread->gc_wake = 1;
 295                                 wake_up_interruptible_all(
 296                                         &sbi->gc_thread->gc_wait_queue_head);
 297                                 wake_up_discard_thread(sbi, true);
 298                         }
 299                 } else {
 300                         sbi->gc_mode = GC_NORMAL;
 301                 }
 302                 return count;
 303         }
 304         if (!strcmp(a->attr.name, "gc_idle")) {
 305                 if (t == GC_IDLE_CB)
 306                         sbi->gc_mode = GC_IDLE_CB;
 307                 else if (t == GC_IDLE_GREEDY)
 308                         sbi->gc_mode = GC_IDLE_GREEDY;
 309                 else
 310                         sbi->gc_mode = GC_NORMAL;
 311                 return count;
 312         }
 313
 314
 315         if (!strcmp(a->attr.name, "iostat_enable")) {
 316                 sbi->iostat_enable = !!t;
 317                 if (!sbi->iostat_enable)
 318                         f2fs_reset_iostat(sbi);
 319                 return count;
 320         }
 321
 322         *ui = (unsigned int)t;
 323
 324         return count;
 325 }
 326
 327 static ssize_t f2fs_sbi_store(struct f2fs_attr *a,
 328                         struct f2fs_sb_info *sbi,
 329                         const char *buf, size_t count)
 330 {
 331         ssize_t ret;
 332         bool gc_entry = (!strcmp(a->attr.name, "gc_urgent") ||
 333                                         a->struct_type == GC_THREAD);
 334
 335         if (gc_entry) {
 336                 if (!down_read_trylock(&sbi->sb->s_umount))
 337                         return -EAGAIN;
 338         }
 339         ret = __sbi_store(a, sbi, buf, count);
 340         if (gc_entry)
 341                 up_read(&sbi->sb->s_umount);
 342
 343         return ret;
 344 }
 345
 346 static ssize_t f2fs_attr_show(struct kobject *kobj,
 347                                 struct attribute *attr, char *buf)
 348 {
 349         struct f2fs_sb_info *sbi = container_of(kobj, struct f2fs_sb_info,
 350                                                                 s_kobj);
 351         struct f2fs_attr *a = container_of(attr, struct f2fs_attr, attr);
 352
 353         return a->show ? a->show(a, sbi, buf) : 0;
 354 }
 355
 356 static ssize_t f2fs_attr_store(struct kobject *kobj, struct attribute *attr,
 357                                                 const char *buf, size_t len)
 358 {
 359         struct f2fs_sb_info *sbi = container_of(kobj, struct f2fs_sb_info,
 360                                                                         s_kobj);
 361         struct f2fs_attr *a = container_of(attr, struct f2fs_attr, attr);
 362
 363         return a->store ? a->store(a, sbi, buf, len) : 0;
 364 }
 365
 366 static void f2fs_sb_release(struct kobject *kobj)
 367 {
 368         struct f2fs_sb_info *sbi = container_of(kobj, struct f2fs_sb_info,
 369                                                                 s_kobj);
 370         complete(&sbi->s_kobj_unregister);
 371 }
 372
 373 enum feat_id {
 374         FEAT_CRYPTO = 0,
 375         FEAT_BLKZONED,
 376         FEAT_ATOMIC_WRITE,
 377         FEAT_EXTRA_ATTR,
 378         FEAT_PROJECT_QUOTA,
 379         FEAT_INODE_CHECKSUM,
 380         FEAT_FLEXIBLE_INLINE_XATTR,
 381         FEAT_QUOTA_INO,
 382         FEAT_INODE_CRTIME,
 383         FEAT_LOST_FOUND,
 384         FEAT_SB_CHECKSUM,
 385         FEAT_CASEFOLD,
 386 };
 387
 388 static ssize_t f2fs_feature_show(struct f2fs_attr *a,
 389                 struct f2fs_sb_info *sbi, char *buf)
 390 {
 391         switch (a->id) {
 392         case FEAT_CRYPTO:
 393         case FEAT_BLKZONED:
 394         case FEAT_ATOMIC_WRITE:
 395         case FEAT_EXTRA_ATTR:
 396         case FEAT_PROJECT_QUOTA:
 397         case FEAT_INODE_CHECKSUM:
 398         case FEAT_FLEXIBLE_INLINE_XATTR:
 399         case FEAT_QUOTA_INO:
 400         case FEAT_INODE_CRTIME:
 401         case FEAT_LOST_FOUND:
 402         case FEAT_SB_CHECKSUM:
 403         case FEAT_CASEFOLD:
 404                 return snprintf(buf, PAGE_SIZE, "supported\n");
 405         }
 406         return 0;
 407 }
 408
 409 #define F2FS_ATTR_OFFSET(_struct_type, _name, _mode, _show, _store, _offset) \
 410 static struct f2fs_attr f2fs_attr_##_name = {                   \
 411         .attr = {.name = __stringify(_name), .mode = _mode },   \
 412         .show   = _show,                                        \
 413         .store  = _store,                                       \
 414         .struct_type = _struct_type,                            \
 415         .offset = _offset                                       \
 416 }
 417
 418 #define F2FS_RW_ATTR(struct_type, struct_name, name, elname)    \
 419         F2FS_ATTR_OFFSET(struct_type, name, 0644,               \
 420                 f2fs_sbi_show, f2fs_sbi_store,                  \
 421                 offsetof(struct struct_name, elname))
 422
 423 #define F2FS_GENERAL_RO_ATTR(name) \
 424 static struct f2fs_attr f2fs_attr_##name = __ATTR(name, 0444, name##_show, NULL)
 425
 426 #define F2FS_FEATURE_RO_ATTR(_name, _id)                        \
 427 static struct f2fs_attr f2fs_attr_##_name = {                   \
 428         .attr = {.name = __stringify(_name), .mode = 0444 },    \
 429         .show   = f2fs_feature_show,                            \
 430         .id     = _id,                                          \
 431 }
 432
 433 F2FS_RW_ATTR(GC_THREAD, f2fs_gc_kthread, gc_urgent_sleep_time,
 434                                                         urgent_sleep_time);
 435 F2FS_RW_ATTR(GC_THREAD, f2fs_gc_kthread, gc_min_sleep_time, min_sleep_time);
 436 F2FS_RW_ATTR(GC_THREAD, f2fs_gc_kthread, gc_max_sleep_time, max_sleep_time);
 437 F2FS_RW_ATTR(GC_THREAD, f2fs_gc_kthread, gc_no_gc_sleep_time, no_gc_sleep_time);
 438 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, gc_idle, gc_mode);
 439 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, gc_urgent, gc_mode);
 440 F2FS_RW_ATTR(SM_INFO, f2fs_sm_info, reclaim_segments, rec_prefree_segments);
 441 F2FS_RW_ATTR(DCC_INFO, discard_cmd_control, max_small_discards, max_discards);
 442 F2FS_RW_ATTR(DCC_INFO, discard_cmd_control, discard_granularity, discard_granularity);
 443 F2FS_RW_ATTR(RESERVED_BLOCKS, f2fs_sb_info, reserved_blocks, reserved_blocks);
 444 F2FS_RW_ATTR(SM_INFO, f2fs_sm_info, batched_trim_sections, trim_sections);
 445 F2FS_RW_ATTR(SM_INFO, f2fs_sm_info, ipu_policy, ipu_policy);
 446 F2FS_RW_ATTR(SM_INFO, f2fs_sm_info, min_ipu_util, min_ipu_util);
 447 F2FS_RW_ATTR(SM_INFO, f2fs_sm_info, min_fsync_blocks, min_fsync_blocks);
 448 F2FS_RW_ATTR(SM_INFO, f2fs_sm_info, min_seq_blocks, min_seq_blocks);
 449 F2FS_RW_ATTR(SM_INFO, f2fs_sm_info, min_hot_blocks, min_hot_blocks);
 450 F2FS_RW_ATTR(SM_INFO, f2fs_sm_info, min_ssr_sections, min_ssr_sections);
 451 F2FS_RW_ATTR(NM_INFO, f2fs_nm_info, ram_thresh, ram_thresh);
 452 F2FS_RW_ATTR(NM_INFO, f2fs_nm_info, ra_nid_pages, ra_nid_pages);
 453 F2FS_RW_ATTR(NM_INFO, f2fs_nm_info, dirty_nats_ratio, dirty_nats_ratio);
 454 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, max_victim_search, max_victim_search);
 455 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, migration_granularity, migration_granularity);
 456 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, dir_level, dir_level);
 457 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, cp_interval, interval_time[CP_TIME]);
 458 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, idle_interval, interval_time[REQ_TIME]);
 459 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, discard_idle_interval,
 460                                         interval_time[DISCARD_TIME]);
 461 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, gc_idle_interval, interval_time[GC_TIME]);
 462 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info,
 463                 umount_discard_timeout, interval_time[UMOUNT_DISCARD_TIMEOUT]);
 464 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, iostat_enable, iostat_enable);
 465 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, readdir_ra, readdir_ra);
 466 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, gc_pin_file_thresh, gc_pin_file_threshold);
 467 F2FS_RW_ATTR(F2FS_SBI, f2fs_super_block, extension_list, extension_list);
 468 #ifdef CONFIG_F2FS_FAULT_INJECTION
 469 F2FS_RW_ATTR(FAULT_INFO_RATE, f2fs_fault_info, inject_rate, inject_rate);
 470 F2FS_RW_ATTR(FAULT_INFO_TYPE, f2fs_fault_info, inject_type, inject_type);
 471 #endif
 472 F2FS_GENERAL_RO_ATTR(dirty_segments);
 473 F2FS_GENERAL_RO_ATTR(lifetime_write_kbytes);
 474 F2FS_GENERAL_RO_ATTR(features);
 475 F2FS_GENERAL_RO_ATTR(current_reserved_blocks);
 476 F2FS_GENERAL_RO_ATTR(unusable);
 477 F2FS_GENERAL_RO_ATTR(encoding);
 478
 479 #ifdef CONFIG_FS_ENCRYPTION
 480 F2FS_FEATURE_RO_ATTR(encryption, FEAT_CRYPTO);
 481 #endif
 482 #ifdef CONFIG_BLK_DEV_ZONED
 483 F2FS_FEATURE_RO_ATTR(block_zoned, FEAT_BLKZONED);
 484 #endif
 485 F2FS_FEATURE_RO_ATTR(atomic_write, FEAT_ATOMIC_WRITE);
 486 F2FS_FEATURE_RO_ATTR(extra_attr, FEAT_EXTRA_ATTR);
 487 F2FS_FEATURE_RO_ATTR(project_quota, FEAT_PROJECT_QUOTA);
 488 F2FS_FEATURE_RO_ATTR(inode_checksum, FEAT_INODE_CHECKSUM);
 489 F2FS_FEATURE_RO_ATTR(flexible_inline_xattr, FEAT_FLEXIBLE_INLINE_XATTR);
 490 F2FS_FEATURE_RO_ATTR(quota_ino, FEAT_QUOTA_INO);
 491 F2FS_FEATURE_RO_ATTR(inode_crtime, FEAT_INODE_CRTIME);
 492 F2FS_FEATURE_RO_ATTR(lost_found, FEAT_LOST_FOUND);
 493 F2FS_FEATURE_RO_ATTR(sb_checksum, FEAT_SB_CHECKSUM);
 494 F2FS_FEATURE_RO_ATTR(casefold, FEAT_CASEFOLD);
 495
 496 #define ATTR_LIST(name) (&f2fs_attr_##name.attr)
 497 static struct attribute *f2fs_attrs[] = {
 498         ATTR_LIST(gc_urgent_sleep_time),
 499         ATTR_LIST(gc_min_sleep_time),
 500         ATTR_LIST(gc_max_sleep_time),
 501         ATTR_LIST(gc_no_gc_sleep_time),
 502         ATTR_LIST(gc_idle),
 503         ATTR_LIST(gc_urgent),
 504         ATTR_LIST(reclaim_segments),
 505         ATTR_LIST(max_small_discards),
 506         ATTR_LIST(discard_granularity),
 507         ATTR_LIST(batched_trim_sections),
 508         ATTR_LIST(ipu_policy),
 509         ATTR_LIST(min_ipu_util),
 510         ATTR_LIST(min_fsync_blocks),
 511         ATTR_LIST(min_seq_blocks),
 512         ATTR_LIST(min_hot_blocks),
 513         ATTR_LIST(min_ssr_sections),
 514         ATTR_LIST(max_victim_search),
 515         ATTR_LIST(migration_granularity),
 516         ATTR_LIST(dir_level),
 517         ATTR_LIST(ram_thresh),
 518         ATTR_LIST(ra_nid_pages),
 519         ATTR_LIST(dirty_nats_ratio),
 520         ATTR_LIST(cp_interval),
 521         ATTR_LIST(idle_interval),
 522         ATTR_LIST(discard_idle_interval),
 523         ATTR_LIST(gc_idle_interval),
 524         ATTR_LIST(umount_discard_timeout),
 525         ATTR_LIST(iostat_enable),
 526         ATTR_LIST(readdir_ra),
 527         ATTR_LIST(gc_pin_file_thresh),
 528         ATTR_LIST(extension_list),
 529 #ifdef CONFIG_F2FS_FAULT_INJECTION
 530         ATTR_LIST(inject_rate),
 531         ATTR_LIST(inject_type),
 532 #endif
 533         ATTR_LIST(dirty_segments),
 534         ATTR_LIST(unusable),
 535         ATTR_LIST(lifetime_write_kbytes),
 536         ATTR_LIST(features),
 537         ATTR_LIST(reserved_blocks),
 538         ATTR_LIST(current_reserved_blocks),
 539         ATTR_LIST(encoding),
 540         NULL,
 541 };
 542 ATTRIBUTE_GROUPS(f2fs);
 543
 544 static struct attribute *f2fs_feat_attrs[] = {
 545 #ifdef CONFIG_FS_ENCRYPTION
 546         ATTR_LIST(encryption),
 547 #endif
 548 #ifdef CONFIG_BLK_DEV_ZONED
 549         ATTR_LIST(block_zoned),
 550 #endif
 551         ATTR_LIST(atomic_write),
 552         ATTR_LIST(extra_attr),
 553         ATTR_LIST(project_quota),
 554         ATTR_LIST(inode_checksum),
 555         ATTR_LIST(flexible_inline_xattr),
 556         ATTR_LIST(quota_ino),
 557         ATTR_LIST(inode_crtime),
 558         ATTR_LIST(lost_found),
 559         ATTR_LIST(sb_checksum),
 560         ATTR_LIST(casefold),
 561         NULL,
 562 };
 563 ATTRIBUTE_GROUPS(f2fs_feat);
 564
 565 static const struct sysfs_ops f2fs_attr_ops = {
 566         .show   = f2fs_attr_show,
 567         .store  = f2fs_attr_store,
 568 };
 569
 570 static struct kobj_type f2fs_sb_ktype = {
 571         .default_groups = f2fs_groups,
 572         .sysfs_ops      = &f2fs_attr_ops,
 573         .release        = f2fs_sb_release,
 574 };
 575
 576 static struct kobj_type f2fs_ktype = {
 577         .sysfs_ops      = &f2fs_attr_ops,
 578 };
 579
 580 static struct kset f2fs_kset = {
 581         .kobj   = {.ktype = &f2fs_ktype},
 582 };
 583
 584 static struct kobj_type f2fs_feat_ktype = {
 585         .default_groups = f2fs_feat_groups,
 586         .sysfs_ops      = &f2fs_attr_ops,
 587 };
 588
 589 static struct kobject f2fs_feat = {
 590         .kset   = &f2fs_kset,
 591 };
 592
 593 static int __maybe_unused segment_info_seq_show(struct seq_file *seq,
 594                                                 void *offset)
 595 {
 596         struct super_block *sb = seq->private;
 597         struct f2fs_sb_info *sbi = F2FS_SB(sb);
 598         unsigned int total_segs =
 599                         le32_to_cpu(sbi->raw_super->segment_count_main);
 600         int i;
 601
 602         seq_puts(seq, "format: segment_type|valid_blocks\n"
 603                 "segment_type(0:HD, 1:WD, 2:CD, 3:HN, 4:WN, 5:CN)\n");
 604
 605         for (i = 0; i < total_segs; i++) {
 606                 struct seg_entry *se = get_seg_entry(sbi, i);
 607
 608                 if ((i % 10) == 0)
 609                         seq_printf(seq, "%-10d", i);
 610                 seq_printf(seq, "%d|%-3u", se->type, se->valid_blocks);
 611                 if ((i % 10) == 9 || i == (total_segs - 1))
 612                         seq_putc(seq, '\n');
 613                 else
 614                         seq_putc(seq, ' ');
 615         }
 616
 617         return 0;
 618 }
 619
 620 static int __maybe_unused segment_bits_seq_show(struct seq_file *seq,
 621                                                 void *offset)
 622 {
 623         struct super_block *sb = seq->private;
 624         struct f2fs_sb_info *sbi = F2FS_SB(sb);
 625         unsigned int total_segs =
 626                         le32_to_cpu(sbi->raw_super->segment_count_main);
 627         int i, j;
 628
 629         seq_puts(seq, "format: segment_type|valid_blocks|bitmaps\n"
 630                 "segment_type(0:HD, 1:WD, 2:CD, 3:HN, 4:WN, 5:CN)\n");
 631
 632         for (i = 0; i < total_segs; i++) {
 633                 struct seg_entry *se = get_seg_entry(sbi, i);
 634
 635                 seq_printf(seq, "%-10d", i);
 636                 seq_printf(seq, "%d|%-3u|", se->type, se->valid_blocks);
 637                 for (j = 0; j < SIT_VBLOCK_MAP_SIZE; j++)
 638                         seq_printf(seq, " %.2x", se->cur_valid_map[j]);
 639                 seq_putc(seq, '\n');
 640         }
 641         return 0;
 642 }
 643
 644 static int __maybe_unused iostat_info_seq_show(struct seq_file *seq,
 645                                                void *offset)
 646 {
 647         struct super_block *sb = seq->private;
 648         struct f2fs_sb_info *sbi = F2FS_SB(sb);
 649         time64_t now = ktime_get_real_seconds();
 650
 651         if (!sbi->iostat_enable)
 652                 return 0;
 653
 654         seq_printf(seq, "time:          %-16llu\n", now);
 655
 656         /* print app IOs */
 657         seq_printf(seq, "app buffered:  %-16llu\n",
 658                                 sbi->write_iostat[APP_BUFFERED_IO]);
 659         seq_printf(seq, "app direct:    %-16llu\n",
 660                                 sbi->write_iostat[APP_DIRECT_IO]);
 661         seq_printf(seq, "app mapped:    %-16llu\n",
 662                                 sbi->write_iostat[APP_MAPPED_IO]);
 663
 664         /* print fs IOs */
 665         seq_printf(seq, "fs data:       %-16llu\n",
 666                                 sbi->write_iostat[FS_DATA_IO]);
 667         seq_printf(seq, "fs node:       %-16llu\n",
 668                                 sbi->write_iostat[FS_NODE_IO]);
 669         seq_printf(seq, "fs meta:       %-16llu\n",
 670                                 sbi->write_iostat[FS_META_IO]);
 671         seq_printf(seq, "fs gc data:    %-16llu\n",
 672                                 sbi->write_iostat[FS_GC_DATA_IO]);
 673         seq_printf(seq, "fs gc node:    %-16llu\n",
 674                                 sbi->write_iostat[FS_GC_NODE_IO]);
 675         seq_printf(seq, "fs cp data:    %-16llu\n",
 676                                 sbi->write_iostat[FS_CP_DATA_IO]);
 677         seq_printf(seq, "fs cp node:    %-16llu\n",
 678                                 sbi->write_iostat[FS_CP_NODE_IO]);
 679         seq_printf(seq, "fs cp meta:    %-16llu\n",
 680                                 sbi->write_iostat[FS_CP_META_IO]);
 681         seq_printf(seq, "fs discard:    %-16llu\n",
 682                                 sbi->write_iostat[FS_DISCARD]);
 683
 684         return 0;
 685 }
 686
 687 static int __maybe_unused victim_bits_seq_show(struct seq_file *seq,
 688                                                 void *offset)
 689 {
 690         struct super_block *sb = seq->private;
 691         struct f2fs_sb_info *sbi = F2FS_SB(sb);
 692         struct dirty_seglist_info *dirty_i = DIRTY_I(sbi);
 693         int i;
 694
 695         seq_puts(seq, "format: victim_secmap bitmaps\n");
 696
 697         for (i = 0; i < MAIN_SECS(sbi); i++) {
 698                 if ((i % 10) == 0)
 699                         seq_printf(seq, "%-10d", i);
 700                 seq_printf(seq, "%d", test_bit(i, dirty_i->victim_secmap) ? 1 : 0);
 701                 if ((i % 10) == 9 || i == (MAIN_SECS(sbi) - 1))
 702                         seq_putc(seq, '\n');
 703                 else
 704                         seq_putc(seq, ' ');
 705         }
 706         return 0;
 707 }
 708
 709 int __init f2fs_init_sysfs(void)
 710 {
 711         int ret;
 712
 713         kobject_set_name(&f2fs_kset.kobj, "f2fs");
 714         f2fs_kset.kobj.parent = fs_kobj;
 715         ret = kset_register(&f2fs_kset);
 716         if (ret)
 717                 return ret;
 718
 719         ret = kobject_init_and_add(&f2fs_feat, &f2fs_feat_ktype,
 720                                    NULL, "features");
 721         if (ret)
 722                 kset_unregister(&f2fs_kset);
 723         else
 724                 f2fs_proc_root = proc_mkdir("fs/f2fs", NULL);
 725         return ret;
 726 }
 727
 728 void f2fs_exit_sysfs(void)
 729 {
 730         kobject_put(&f2fs_feat);
 731         kset_unregister(&f2fs_kset);
 732         remove_proc_entry("fs/f2fs", NULL);
 733         f2fs_proc_root = NULL;
 734 }
 735
 736 int f2fs_register_sysfs(struct f2fs_sb_info *sbi)
 737 {
 738         struct super_block *sb = sbi->sb;
 739         int err;
 740
 741         sbi->s_kobj.kset = &f2fs_kset;
 742         init_completion(&sbi->s_kobj_unregister);
 743         err = kobject_init_and_add(&sbi->s_kobj, &f2fs_sb_ktype, NULL,
 744                                 "%s", sb->s_id);
 745         if (err)
 746                 return err;
 747
 748         if (f2fs_proc_root)
 749                 sbi->s_proc = proc_mkdir(sb->s_id, f2fs_proc_root);
 750
 751         if (sbi->s_proc) {
 752                 proc_create_single_data("segment_info", S_IRUGO, sbi->s_proc,
 753                                 segment_info_seq_show, sb);
 754                 proc_create_single_data("segment_bits", S_IRUGO, sbi->s_proc,
 755                                 segment_bits_seq_show, sb);
 756                 proc_create_single_data("iostat_info", S_IRUGO, sbi->s_proc,
 757                                 iostat_info_seq_show, sb);
 758                 proc_create_single_data("victim_bits", S_IRUGO, sbi->s_proc,
 759                                 victim_bits_seq_show, sb);
 760         }
 761         return 0;
 762 }
 763
 764 void f2fs_unregister_sysfs(struct f2fs_sb_info *sbi)
 765 {
 766         if (sbi->s_proc) {
 767                 remove_proc_entry("iostat_info", sbi->s_proc);
 768                 remove_proc_entry("segment_info", sbi->s_proc);
 769                 remove_proc_entry("segment_bits", sbi->s_proc);
 770                 remove_proc_entry("victim_bits", sbi->s_proc);
 771                 remove_proc_entry(sbi->sb->s_id, f2fs_proc_root);
 772         }
 773         kobject_del(&sbi->s_kobj);
 774 }