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_verity(sbi))
 149                 len += snprintf(buf + len, PAGE_SIZE - len, "%s%s",
 150                                 len ? ", " : "", "verity");
 151         if (f2fs_sb_has_sb_chksum(sbi))
 152                 len += snprintf(buf + len, PAGE_SIZE - len, "%s%s",
 153                                 len ? ", " : "", "sb_checksum");
 154         if (f2fs_sb_has_casefold(sbi))
 155                 len += snprintf(buf + len, PAGE_SIZE - len, "%s%s",
 156                                 len ? ", " : "", "casefold");
 157         len += snprintf(buf + len, PAGE_SIZE - len, "\n");
 158         return len;
 159 }
 160
 161 static ssize_t current_reserved_blocks_show(struct f2fs_attr *a,
 162                                         struct f2fs_sb_info *sbi, char *buf)
 163 {
 164         return snprintf(buf, PAGE_SIZE, "%u\n", sbi->current_reserved_blocks);
 165 }
 166
 167 static ssize_t f2fs_sbi_show(struct f2fs_attr *a,
 168                         struct f2fs_sb_info *sbi, char *buf)
 169 {
 170         unsigned char *ptr = NULL;
 171         unsigned int *ui;
 172
 173         ptr = __struct_ptr(sbi, a->struct_type);
 174         if (!ptr)
 175                 return -EINVAL;
 176
 177         if (!strcmp(a->attr.name, "extension_list")) {
 178                 __u8 (*extlist)[F2FS_EXTENSION_LEN] =
 179                                         sbi->raw_super->extension_list;
 180                 int cold_count = le32_to_cpu(sbi->raw_super->extension_count);
 181                 int hot_count = sbi->raw_super->hot_ext_count;
 182                 int len = 0, i;
 183
 184                 len += snprintf(buf + len, PAGE_SIZE - len,
 185                                                 "cold file extension:\n");
 186                 for (i = 0; i < cold_count; i++)
 187                         len += snprintf(buf + len, PAGE_SIZE - len, "%s\n",
 188                                                                 extlist[i]);
 189
 190                 len += snprintf(buf + len, PAGE_SIZE - len,
 191                                                 "hot file extension:\n");
 192                 for (i = cold_count; i < cold_count + hot_count; i++)
 193                         len += snprintf(buf + len, PAGE_SIZE - len, "%s\n",
 194                                                                 extlist[i]);
 195                 return len;
 196         }
 197
 198         ui = (unsigned int *)(ptr + a->offset);
 199
 200         return snprintf(buf, PAGE_SIZE, "%u\n", *ui);
 201 }
 202
 203 static ssize_t __sbi_store(struct f2fs_attr *a,
 204                         struct f2fs_sb_info *sbi,
 205                         const char *buf, size_t count)
 206 {
 207         unsigned char *ptr;
 208         unsigned long t;
 209         unsigned int *ui;
 210         ssize_t ret;
 211
 212         ptr = __struct_ptr(sbi, a->struct_type);
 213         if (!ptr)
 214                 return -EINVAL;
 215
 216         if (!strcmp(a->attr.name, "extension_list")) {
 217                 const char *name = strim((char *)buf);
 218                 bool set = true, hot;
 219
 220                 if (!strncmp(name, "[h]", 3))
 221                         hot = true;
 222                 else if (!strncmp(name, "[c]", 3))
 223                         hot = false;
 224                 else
 225                         return -EINVAL;
 226
 227                 name += 3;
 228
 229                 if (*name == '!') {
 230                         name++;
 231                         set = false;
 232                 }
 233
 234                 if (strlen(name) >= F2FS_EXTENSION_LEN)
 235                         return -EINVAL;
 236
 237                 down_write(&sbi->sb_lock);
 238
 239                 ret = f2fs_update_extension_list(sbi, name, hot, set);
 240                 if (ret)
 241                         goto out;
 242
 243                 ret = f2fs_commit_super(sbi, false);
 244                 if (ret)
 245                         f2fs_update_extension_list(sbi, name, hot, !set);
 246 out:
 247                 up_write(&sbi->sb_lock);
 248                 return ret ? ret : count;
 249         }
 250
 251         ui = (unsigned int *)(ptr + a->offset);
 252
 253         ret = kstrtoul(skip_spaces(buf), 0, &t);
 254         if (ret < 0)
 255                 return ret;
 256 #ifdef CONFIG_F2FS_FAULT_INJECTION
 257         if (a->struct_type == FAULT_INFO_TYPE && t >= (1 << FAULT_MAX))
 258                 return -EINVAL;
 259         if (a->struct_type == FAULT_INFO_RATE && t >= UINT_MAX)
 260                 return -EINVAL;
 261 #endif
 262         if (a->struct_type == RESERVED_BLOCKS) {
 263                 spin_lock(&sbi->stat_lock);
 264                 if (t > (unsigned long)(sbi->user_block_count -
 265                                 F2FS_OPTION(sbi).root_reserved_blocks)) {
 266                         spin_unlock(&sbi->stat_lock);
 267                         return -EINVAL;
 268                 }
 269                 *ui = t;
 270                 sbi->current_reserved_blocks = min(sbi->reserved_blocks,
 271                                 sbi->user_block_count - valid_user_blocks(sbi));
 272                 spin_unlock(&sbi->stat_lock);
 273                 return count;
 274         }
 275
 276         if (!strcmp(a->attr.name, "discard_granularity")) {
 277                 if (t == 0 || t > MAX_PLIST_NUM)
 278                         return -EINVAL;
 279                 if (t == *ui)
 280                         return count;
 281                 *ui = t;
 282                 return count;
 283         }
 284
 285         if (!strcmp(a->attr.name, "migration_granularity")) {
 286                 if (t == 0 || t > sbi->segs_per_sec)
 287                         return -EINVAL;
 288         }
 289
 290         if (!strcmp(a->attr.name, "trim_sections"))
 291                 return -EINVAL;
 292
 293         if (!strcmp(a->attr.name, "gc_urgent")) {
 294                 if (t >= 1) {
 295                         sbi->gc_mode = GC_URGENT;
 296                         if (sbi->gc_thread) {
 297                                 sbi->gc_thread->gc_wake = 1;
 298                                 wake_up_interruptible_all(
 299                                         &sbi->gc_thread->gc_wait_queue_head);
 300                                 wake_up_discard_thread(sbi, true);
 301                         }
 302                 } else {
 303                         sbi->gc_mode = GC_NORMAL;
 304                 }
 305                 return count;
 306         }
 307         if (!strcmp(a->attr.name, "gc_idle")) {
 308                 if (t == GC_IDLE_CB)
 309                         sbi->gc_mode = GC_IDLE_CB;
 310                 else if (t == GC_IDLE_GREEDY)
 311                         sbi->gc_mode = GC_IDLE_GREEDY;
 312                 else
 313                         sbi->gc_mode = GC_NORMAL;
 314                 return count;
 315         }
 316
 317
 318         if (!strcmp(a->attr.name, "iostat_enable")) {
 319                 sbi->iostat_enable = !!t;
 320                 if (!sbi->iostat_enable)
 321                         f2fs_reset_iostat(sbi);
 322                 return count;
 323         }
 324
 325         *ui = (unsigned int)t;
 326
 327         return count;
 328 }
 329
 330 static ssize_t f2fs_sbi_store(struct f2fs_attr *a,
 331                         struct f2fs_sb_info *sbi,
 332                         const char *buf, size_t count)
 333 {
 334         ssize_t ret;
 335         bool gc_entry = (!strcmp(a->attr.name, "gc_urgent") ||
 336                                         a->struct_type == GC_THREAD);
 337
 338         if (gc_entry) {
 339                 if (!down_read_trylock(&sbi->sb->s_umount))
 340                         return -EAGAIN;
 341         }
 342         ret = __sbi_store(a, sbi, buf, count);
 343         if (gc_entry)
 344                 up_read(&sbi->sb->s_umount);
 345
 346         return ret;
 347 }
 348
 349 static ssize_t f2fs_attr_show(struct kobject *kobj,
 350                                 struct attribute *attr, char *buf)
 351 {
 352         struct f2fs_sb_info *sbi = container_of(kobj, struct f2fs_sb_info,
 353                                                                 s_kobj);
 354         struct f2fs_attr *a = container_of(attr, struct f2fs_attr, attr);
 355
 356         return a->show ? a->show(a, sbi, buf) : 0;
 357 }
 358
 359 static ssize_t f2fs_attr_store(struct kobject *kobj, struct attribute *attr,
 360                                                 const char *buf, size_t len)
 361 {
 362         struct f2fs_sb_info *sbi = container_of(kobj, struct f2fs_sb_info,
 363                                                                         s_kobj);
 364         struct f2fs_attr *a = container_of(attr, struct f2fs_attr, attr);
 365
 366         return a->store ? a->store(a, sbi, buf, len) : 0;
 367 }
 368
 369 static void f2fs_sb_release(struct kobject *kobj)
 370 {
 371         struct f2fs_sb_info *sbi = container_of(kobj, struct f2fs_sb_info,
 372                                                                 s_kobj);
 373         complete(&sbi->s_kobj_unregister);
 374 }
 375
 376 enum feat_id {
 377         FEAT_CRYPTO = 0,
 378         FEAT_BLKZONED,
 379         FEAT_ATOMIC_WRITE,
 380         FEAT_EXTRA_ATTR,
 381         FEAT_PROJECT_QUOTA,
 382         FEAT_INODE_CHECKSUM,
 383         FEAT_FLEXIBLE_INLINE_XATTR,
 384         FEAT_QUOTA_INO,
 385         FEAT_INODE_CRTIME,
 386         FEAT_LOST_FOUND,
 387         FEAT_VERITY,
 388         FEAT_SB_CHECKSUM,
 389         FEAT_CASEFOLD,
 390 };
 391
 392 static ssize_t f2fs_feature_show(struct f2fs_attr *a,
 393                 struct f2fs_sb_info *sbi, char *buf)
 394 {
 395         switch (a->id) {
 396         case FEAT_CRYPTO:
 397         case FEAT_BLKZONED:
 398         case FEAT_ATOMIC_WRITE:
 399         case FEAT_EXTRA_ATTR:
 400         case FEAT_PROJECT_QUOTA:
 401         case FEAT_INODE_CHECKSUM:
 402         case FEAT_FLEXIBLE_INLINE_XATTR:
 403         case FEAT_QUOTA_INO:
 404         case FEAT_INODE_CRTIME:
 405         case FEAT_LOST_FOUND:
 406         case FEAT_VERITY:
 407         case FEAT_SB_CHECKSUM:
 408         case FEAT_CASEFOLD:
 409                 return snprintf(buf, PAGE_SIZE, "supported\n");
 410         }
 411         return 0;
 412 }
 413
 414 #define F2FS_ATTR_OFFSET(_struct_type, _name, _mode, _show, _store, _offset) \
 415 static struct f2fs_attr f2fs_attr_##_name = {                   \
 416         .attr = {.name = __stringify(_name), .mode = _mode },   \
 417         .show   = _show,                                        \
 418         .store  = _store,                                       \
 419         .struct_type = _struct_type,                            \
 420         .offset = _offset                                       \
 421 }
 422
 423 #define F2FS_RW_ATTR(struct_type, struct_name, name, elname)    \
 424         F2FS_ATTR_OFFSET(struct_type, name, 0644,               \
 425                 f2fs_sbi_show, f2fs_sbi_store,                  \
 426                 offsetof(struct struct_name, elname))
 427
 428 #define F2FS_GENERAL_RO_ATTR(name) \
 429 static struct f2fs_attr f2fs_attr_##name = __ATTR(name, 0444, name##_show, NULL)
 430
 431 #define F2FS_FEATURE_RO_ATTR(_name, _id)                        \
 432 static struct f2fs_attr f2fs_attr_##_name = {                   \
 433         .attr = {.name = __stringify(_name), .mode = 0444 },    \
 434         .show   = f2fs_feature_show,                            \
 435         .id     = _id,                                          \
 436 }
 437
 438 F2FS_RW_ATTR(GC_THREAD, f2fs_gc_kthread, gc_urgent_sleep_time,
 439                                                         urgent_sleep_time);
 440 F2FS_RW_ATTR(GC_THREAD, f2fs_gc_kthread, gc_min_sleep_time, min_sleep_time);
 441 F2FS_RW_ATTR(GC_THREAD, f2fs_gc_kthread, gc_max_sleep_time, max_sleep_time);
 442 F2FS_RW_ATTR(GC_THREAD, f2fs_gc_kthread, gc_no_gc_sleep_time, no_gc_sleep_time);
 443 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, gc_idle, gc_mode);
 444 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, gc_urgent, gc_mode);
 445 F2FS_RW_ATTR(SM_INFO, f2fs_sm_info, reclaim_segments, rec_prefree_segments);
 446 F2FS_RW_ATTR(DCC_INFO, discard_cmd_control, max_small_discards, max_discards);
 447 F2FS_RW_ATTR(DCC_INFO, discard_cmd_control, discard_granularity, discard_granularity);
 448 F2FS_RW_ATTR(RESERVED_BLOCKS, f2fs_sb_info, reserved_blocks, reserved_blocks);
 449 F2FS_RW_ATTR(SM_INFO, f2fs_sm_info, batched_trim_sections, trim_sections);
 450 F2FS_RW_ATTR(SM_INFO, f2fs_sm_info, ipu_policy, ipu_policy);
 451 F2FS_RW_ATTR(SM_INFO, f2fs_sm_info, min_ipu_util, min_ipu_util);
 452 F2FS_RW_ATTR(SM_INFO, f2fs_sm_info, min_fsync_blocks, min_fsync_blocks);
 453 F2FS_RW_ATTR(SM_INFO, f2fs_sm_info, min_seq_blocks, min_seq_blocks);
 454 F2FS_RW_ATTR(SM_INFO, f2fs_sm_info, min_hot_blocks, min_hot_blocks);
 455 F2FS_RW_ATTR(SM_INFO, f2fs_sm_info, min_ssr_sections, min_ssr_sections);
 456 F2FS_RW_ATTR(NM_INFO, f2fs_nm_info, ram_thresh, ram_thresh);
 457 F2FS_RW_ATTR(NM_INFO, f2fs_nm_info, ra_nid_pages, ra_nid_pages);
 458 F2FS_RW_ATTR(NM_INFO, f2fs_nm_info, dirty_nats_ratio, dirty_nats_ratio);
 459 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, max_victim_search, max_victim_search);
 460 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, migration_granularity, migration_granularity);
 461 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, dir_level, dir_level);
 462 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, cp_interval, interval_time[CP_TIME]);
 463 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, idle_interval, interval_time[REQ_TIME]);
 464 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, discard_idle_interval,
 465                                         interval_time[DISCARD_TIME]);
 466 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, gc_idle_interval, interval_time[GC_TIME]);
 467 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info,
 468                 umount_discard_timeout, interval_time[UMOUNT_DISCARD_TIMEOUT]);
 469 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, iostat_enable, iostat_enable);
 470 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, readdir_ra, readdir_ra);
 471 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, gc_pin_file_thresh, gc_pin_file_threshold);
 472 F2FS_RW_ATTR(F2FS_SBI, f2fs_super_block, extension_list, extension_list);
 473 #ifdef CONFIG_F2FS_FAULT_INJECTION
 474 F2FS_RW_ATTR(FAULT_INFO_RATE, f2fs_fault_info, inject_rate, inject_rate);
 475 F2FS_RW_ATTR(FAULT_INFO_TYPE, f2fs_fault_info, inject_type, inject_type);
 476 #endif
 477 F2FS_GENERAL_RO_ATTR(dirty_segments);
 478 F2FS_GENERAL_RO_ATTR(lifetime_write_kbytes);
 479 F2FS_GENERAL_RO_ATTR(features);
 480 F2FS_GENERAL_RO_ATTR(current_reserved_blocks);
 481 F2FS_GENERAL_RO_ATTR(unusable);
 482 F2FS_GENERAL_RO_ATTR(encoding);
 483
 484 #ifdef CONFIG_FS_ENCRYPTION
 485 F2FS_FEATURE_RO_ATTR(encryption, FEAT_CRYPTO);
 486 #endif
 487 #ifdef CONFIG_BLK_DEV_ZONED
 488 F2FS_FEATURE_RO_ATTR(block_zoned, FEAT_BLKZONED);
 489 #endif
 490 F2FS_FEATURE_RO_ATTR(atomic_write, FEAT_ATOMIC_WRITE);
 491 F2FS_FEATURE_RO_ATTR(extra_attr, FEAT_EXTRA_ATTR);
 492 F2FS_FEATURE_RO_ATTR(project_quota, FEAT_PROJECT_QUOTA);
 493 F2FS_FEATURE_RO_ATTR(inode_checksum, FEAT_INODE_CHECKSUM);
 494 F2FS_FEATURE_RO_ATTR(flexible_inline_xattr, FEAT_FLEXIBLE_INLINE_XATTR);
 495 F2FS_FEATURE_RO_ATTR(quota_ino, FEAT_QUOTA_INO);
 496 F2FS_FEATURE_RO_ATTR(inode_crtime, FEAT_INODE_CRTIME);
 497 F2FS_FEATURE_RO_ATTR(lost_found, FEAT_LOST_FOUND);
 498 #ifdef CONFIG_FS_VERITY
 499 F2FS_FEATURE_RO_ATTR(verity, FEAT_VERITY);
 500 #endif
 501 F2FS_FEATURE_RO_ATTR(sb_checksum, FEAT_SB_CHECKSUM);
 502 F2FS_FEATURE_RO_ATTR(casefold, FEAT_CASEFOLD);
 503
 504 #define ATTR_LIST(name) (&f2fs_attr_##name.attr)
 505 static struct attribute *f2fs_attrs[] = {
 506         ATTR_LIST(gc_urgent_sleep_time),
 507         ATTR_LIST(gc_min_sleep_time),
 508         ATTR_LIST(gc_max_sleep_time),
 509         ATTR_LIST(gc_no_gc_sleep_time),
 510         ATTR_LIST(gc_idle),
 511         ATTR_LIST(gc_urgent),
 512         ATTR_LIST(reclaim_segments),
 513         ATTR_LIST(max_small_discards),
 514         ATTR_LIST(discard_granularity),
 515         ATTR_LIST(batched_trim_sections),
 516         ATTR_LIST(ipu_policy),
 517         ATTR_LIST(min_ipu_util),
 518         ATTR_LIST(min_fsync_blocks),
 519         ATTR_LIST(min_seq_blocks),
 520         ATTR_LIST(min_hot_blocks),
 521         ATTR_LIST(min_ssr_sections),
 522         ATTR_LIST(max_victim_search),
 523         ATTR_LIST(migration_granularity),
 524         ATTR_LIST(dir_level),
 525         ATTR_LIST(ram_thresh),
 526         ATTR_LIST(ra_nid_pages),
 527         ATTR_LIST(dirty_nats_ratio),
 528         ATTR_LIST(cp_interval),
 529         ATTR_LIST(idle_interval),
 530         ATTR_LIST(discard_idle_interval),
 531         ATTR_LIST(gc_idle_interval),
 532         ATTR_LIST(umount_discard_timeout),
 533         ATTR_LIST(iostat_enable),
 534         ATTR_LIST(readdir_ra),
 535         ATTR_LIST(gc_pin_file_thresh),
 536         ATTR_LIST(extension_list),
 537 #ifdef CONFIG_F2FS_FAULT_INJECTION
 538         ATTR_LIST(inject_rate),
 539         ATTR_LIST(inject_type),
 540 #endif
 541         ATTR_LIST(dirty_segments),
 542         ATTR_LIST(unusable),
 543         ATTR_LIST(lifetime_write_kbytes),
 544         ATTR_LIST(features),
 545         ATTR_LIST(reserved_blocks),
 546         ATTR_LIST(current_reserved_blocks),
 547         ATTR_LIST(encoding),
 548         NULL,
 549 };
 550 ATTRIBUTE_GROUPS(f2fs);
 551
 552 static struct attribute *f2fs_feat_attrs[] = {
 553 #ifdef CONFIG_FS_ENCRYPTION
 554         ATTR_LIST(encryption),
 555 #endif
 556 #ifdef CONFIG_BLK_DEV_ZONED
 557         ATTR_LIST(block_zoned),
 558 #endif
 559         ATTR_LIST(atomic_write),
 560         ATTR_LIST(extra_attr),
 561         ATTR_LIST(project_quota),
 562         ATTR_LIST(inode_checksum),
 563         ATTR_LIST(flexible_inline_xattr),
 564         ATTR_LIST(quota_ino),
 565         ATTR_LIST(inode_crtime),
 566         ATTR_LIST(lost_found),
 567 #ifdef CONFIG_FS_VERITY
 568         ATTR_LIST(verity),
 569 #endif
 570         ATTR_LIST(sb_checksum),
 571         ATTR_LIST(casefold),
 572         NULL,
 573 };
 574 ATTRIBUTE_GROUPS(f2fs_feat);
 575
 576 static const struct sysfs_ops f2fs_attr_ops = {
 577         .show   = f2fs_attr_show,
 578         .store  = f2fs_attr_store,
 579 };
 580
 581 static struct kobj_type f2fs_sb_ktype = {
 582         .default_groups = f2fs_groups,
 583         .sysfs_ops      = &f2fs_attr_ops,
 584         .release        = f2fs_sb_release,
 585 };
 586
 587 static struct kobj_type f2fs_ktype = {
 588         .sysfs_ops      = &f2fs_attr_ops,
 589 };
 590
 591 static struct kset f2fs_kset = {
 592         .kobj   = {.ktype = &f2fs_ktype},
 593 };
 594
 595 static struct kobj_type f2fs_feat_ktype = {
 596         .default_groups = f2fs_feat_groups,
 597         .sysfs_ops      = &f2fs_attr_ops,
 598 };
 599
 600 static struct kobject f2fs_feat = {
 601         .kset   = &f2fs_kset,
 602 };
 603
 604 static int __maybe_unused segment_info_seq_show(struct seq_file *seq,
 605                                                 void *offset)
 606 {
 607         struct super_block *sb = seq->private;
 608         struct f2fs_sb_info *sbi = F2FS_SB(sb);
 609         unsigned int total_segs =
 610                         le32_to_cpu(sbi->raw_super->segment_count_main);
 611         int i;
 612
 613         seq_puts(seq, "format: segment_type|valid_blocks\n"
 614                 "segment_type(0:HD, 1:WD, 2:CD, 3:HN, 4:WN, 5:CN)\n");
 615
 616         for (i = 0; i < total_segs; i++) {
 617                 struct seg_entry *se = get_seg_entry(sbi, i);
 618
 619                 if ((i % 10) == 0)
 620                         seq_printf(seq, "%-10d", i);
 621                 seq_printf(seq, "%d|%-3u", se->type, se->valid_blocks);
 622                 if ((i % 10) == 9 || i == (total_segs - 1))
 623                         seq_putc(seq, '\n');
 624                 else
 625                         seq_putc(seq, ' ');
 626         }
 627
 628         return 0;
 629 }
 630
 631 static int __maybe_unused segment_bits_seq_show(struct seq_file *seq,
 632                                                 void *offset)
 633 {
 634         struct super_block *sb = seq->private;
 635         struct f2fs_sb_info *sbi = F2FS_SB(sb);
 636         unsigned int total_segs =
 637                         le32_to_cpu(sbi->raw_super->segment_count_main);
 638         int i, j;
 639
 640         seq_puts(seq, "format: segment_type|valid_blocks|bitmaps\n"
 641                 "segment_type(0:HD, 1:WD, 2:CD, 3:HN, 4:WN, 5:CN)\n");
 642
 643         for (i = 0; i < total_segs; i++) {
 644                 struct seg_entry *se = get_seg_entry(sbi, i);
 645
 646                 seq_printf(seq, "%-10d", i);
 647                 seq_printf(seq, "%d|%-3u|", se->type, se->valid_blocks);
 648                 for (j = 0; j < SIT_VBLOCK_MAP_SIZE; j++)
 649                         seq_printf(seq, " %.2x", se->cur_valid_map[j]);
 650                 seq_putc(seq, '\n');
 651         }
 652         return 0;
 653 }
 654
 655 static int __maybe_unused iostat_info_seq_show(struct seq_file *seq,
 656                                                void *offset)
 657 {
 658         struct super_block *sb = seq->private;
 659         struct f2fs_sb_info *sbi = F2FS_SB(sb);
 660         time64_t now = ktime_get_real_seconds();
 661
 662         if (!sbi->iostat_enable)
 663                 return 0;
 664
 665         seq_printf(seq, "time:          %-16llu\n", now);
 666
 667         /* print app IOs */
 668         seq_printf(seq, "app buffered:  %-16llu\n",
 669                                 sbi->write_iostat[APP_BUFFERED_IO]);
 670         seq_printf(seq, "app direct:    %-16llu\n",
 671                                 sbi->write_iostat[APP_DIRECT_IO]);
 672         seq_printf(seq, "app mapped:    %-16llu\n",
 673                                 sbi->write_iostat[APP_MAPPED_IO]);
 674
 675         /* print fs IOs */
 676         seq_printf(seq, "fs data:       %-16llu\n",
 677                                 sbi->write_iostat[FS_DATA_IO]);
 678         seq_printf(seq, "fs node:       %-16llu\n",
 679                                 sbi->write_iostat[FS_NODE_IO]);
 680         seq_printf(seq, "fs meta:       %-16llu\n",
 681                                 sbi->write_iostat[FS_META_IO]);
 682         seq_printf(seq, "fs gc data:    %-16llu\n",
 683                                 sbi->write_iostat[FS_GC_DATA_IO]);
 684         seq_printf(seq, "fs gc node:    %-16llu\n",
 685                                 sbi->write_iostat[FS_GC_NODE_IO]);
 686         seq_printf(seq, "fs cp data:    %-16llu\n",
 687                                 sbi->write_iostat[FS_CP_DATA_IO]);
 688         seq_printf(seq, "fs cp node:    %-16llu\n",
 689                                 sbi->write_iostat[FS_CP_NODE_IO]);
 690         seq_printf(seq, "fs cp meta:    %-16llu\n",
 691                                 sbi->write_iostat[FS_CP_META_IO]);
 692         seq_printf(seq, "fs discard:    %-16llu\n",
 693                                 sbi->write_iostat[FS_DISCARD]);
 694
 695         return 0;
 696 }
 697
 698 static int __maybe_unused victim_bits_seq_show(struct seq_file *seq,
 699                                                 void *offset)
 700 {
 701         struct super_block *sb = seq->private;
 702         struct f2fs_sb_info *sbi = F2FS_SB(sb);
 703         struct dirty_seglist_info *dirty_i = DIRTY_I(sbi);
 704         int i;
 705
 706         seq_puts(seq, "format: victim_secmap bitmaps\n");
 707
 708         for (i = 0; i < MAIN_SECS(sbi); i++) {
 709                 if ((i % 10) == 0)
 710                         seq_printf(seq, "%-10d", i);
 711                 seq_printf(seq, "%d", test_bit(i, dirty_i->victim_secmap) ? 1 : 0);
 712                 if ((i % 10) == 9 || i == (MAIN_SECS(sbi) - 1))
 713                         seq_putc(seq, '\n');
 714                 else
 715                         seq_putc(seq, ' ');
 716         }
 717         return 0;
 718 }
 719
 720 int __init f2fs_init_sysfs(void)
 721 {
 722         int ret;
 723
 724         kobject_set_name(&f2fs_kset.kobj, "f2fs");
 725         f2fs_kset.kobj.parent = fs_kobj;
 726         ret = kset_register(&f2fs_kset);
 727         if (ret)
 728                 return ret;
 729
 730         ret = kobject_init_and_add(&f2fs_feat, &f2fs_feat_ktype,
 731                                    NULL, "features");
 732         if (ret)
 733                 kset_unregister(&f2fs_kset);
 734         else
 735                 f2fs_proc_root = proc_mkdir("fs/f2fs", NULL);
 736         return ret;
 737 }
 738
 739 void f2fs_exit_sysfs(void)
 740 {
 741         kobject_put(&f2fs_feat);
 742         kset_unregister(&f2fs_kset);
 743         remove_proc_entry("fs/f2fs", NULL);
 744         f2fs_proc_root = NULL;
 745 }
 746
 747 int f2fs_register_sysfs(struct f2fs_sb_info *sbi)
 748 {
 749         struct super_block *sb = sbi->sb;
 750         int err;
 751
 752         sbi->s_kobj.kset = &f2fs_kset;
 753         init_completion(&sbi->s_kobj_unregister);
 754         err = kobject_init_and_add(&sbi->s_kobj, &f2fs_sb_ktype, NULL,
 755                                 "%s", sb->s_id);
 756         if (err)
 757                 return err;
 758
 759         if (f2fs_proc_root)
 760                 sbi->s_proc = proc_mkdir(sb->s_id, f2fs_proc_root);
 761
 762         if (sbi->s_proc) {
 763                 proc_create_single_data("segment_info", S_IRUGO, sbi->s_proc,
 764                                 segment_info_seq_show, sb);
 765                 proc_create_single_data("segment_bits", S_IRUGO, sbi->s_proc,
 766                                 segment_bits_seq_show, sb);
 767                 proc_create_single_data("iostat_info", S_IRUGO, sbi->s_proc,
 768                                 iostat_info_seq_show, sb);
 769                 proc_create_single_data("victim_bits", S_IRUGO, sbi->s_proc,
 770                                 victim_bits_seq_show, sb);
 771         }
 772         return 0;
 773 }
 774
 775 void f2fs_unregister_sysfs(struct f2fs_sb_info *sbi)
 776 {
 777         if (sbi->s_proc) {
 778                 remove_proc_entry("iostat_info", sbi->s_proc);
 779                 remove_proc_entry("segment_info", sbi->s_proc);
 780                 remove_proc_entry("segment_bits", sbi->s_proc);
 781                 remove_proc_entry("victim_bits", sbi->s_proc);
 782                 remove_proc_entry(sbi->sb->s_id, f2fs_proc_root);
 783         }
 784         kobject_del(&sbi->s_kobj);
 785 }