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, "%s%s",
 158                                 len ? ", " : "", "pin_file");
 159         len += snprintf(buf + len, PAGE_SIZE - len, "\n");
 160         return len;
 161 }
 162
 163 static ssize_t current_reserved_blocks_show(struct f2fs_attr *a,
 164                                         struct f2fs_sb_info *sbi, char *buf)
 165 {
 166         return snprintf(buf, PAGE_SIZE, "%u\n", sbi->current_reserved_blocks);
 167 }
 168
 169 static ssize_t f2fs_sbi_show(struct f2fs_attr *a,
 170                         struct f2fs_sb_info *sbi, char *buf)
 171 {
 172         unsigned char *ptr = NULL;
 173         unsigned int *ui;
 174
 175         ptr = __struct_ptr(sbi, a->struct_type);
 176         if (!ptr)
 177                 return -EINVAL;
 178
 179         if (!strcmp(a->attr.name, "extension_list")) {
 180                 __u8 (*extlist)[F2FS_EXTENSION_LEN] =
 181                                         sbi->raw_super->extension_list;
 182                 int cold_count = le32_to_cpu(sbi->raw_super->extension_count);
 183                 int hot_count = sbi->raw_super->hot_ext_count;
 184                 int len = 0, i;
 185
 186                 len += snprintf(buf + len, PAGE_SIZE - len,
 187                                                 "cold file extension:\n");
 188                 for (i = 0; i < cold_count; i++)
 189                         len += snprintf(buf + len, PAGE_SIZE - len, "%s\n",
 190                                                                 extlist[i]);
 191
 192                 len += snprintf(buf + len, PAGE_SIZE - len,
 193                                                 "hot file extension:\n");
 194                 for (i = cold_count; i < cold_count + hot_count; i++)
 195                         len += snprintf(buf + len, PAGE_SIZE - len, "%s\n",
 196                                                                 extlist[i]);
 197                 return len;
 198         }
 199
 200         ui = (unsigned int *)(ptr + a->offset);
 201
 202         return snprintf(buf, PAGE_SIZE, "%u\n", *ui);
 203 }
 204
 205 static ssize_t __sbi_store(struct f2fs_attr *a,
 206                         struct f2fs_sb_info *sbi,
 207                         const char *buf, size_t count)
 208 {
 209         unsigned char *ptr;
 210         unsigned long t;
 211         unsigned int *ui;
 212         ssize_t ret;
 213
 214         ptr = __struct_ptr(sbi, a->struct_type);
 215         if (!ptr)
 216                 return -EINVAL;
 217
 218         if (!strcmp(a->attr.name, "extension_list")) {
 219                 const char *name = strim((char *)buf);
 220                 bool set = true, hot;
 221
 222                 if (!strncmp(name, "[h]", 3))
 223                         hot = true;
 224                 else if (!strncmp(name, "[c]", 3))
 225                         hot = false;
 226                 else
 227                         return -EINVAL;
 228
 229                 name += 3;
 230
 231                 if (*name == '!') {
 232                         name++;
 233                         set = false;
 234                 }
 235
 236                 if (strlen(name) >= F2FS_EXTENSION_LEN)
 237                         return -EINVAL;
 238
 239                 down_write(&sbi->sb_lock);
 240
 241                 ret = f2fs_update_extension_list(sbi, name, hot, set);
 242                 if (ret)
 243                         goto out;
 244
 245                 ret = f2fs_commit_super(sbi, false);
 246                 if (ret)
 247                         f2fs_update_extension_list(sbi, name, hot, !set);
 248 out:
 249                 up_write(&sbi->sb_lock);
 250                 return ret ? ret : count;
 251         }
 252
 253         ui = (unsigned int *)(ptr + a->offset);
 254
 255         ret = kstrtoul(skip_spaces(buf), 0, &t);
 256         if (ret < 0)
 257                 return ret;
 258 #ifdef CONFIG_F2FS_FAULT_INJECTION
 259         if (a->struct_type == FAULT_INFO_TYPE && t >= (1 << FAULT_MAX))
 260                 return -EINVAL;
 261         if (a->struct_type == FAULT_INFO_RATE && t >= UINT_MAX)
 262                 return -EINVAL;
 263 #endif
 264         if (a->struct_type == RESERVED_BLOCKS) {
 265                 spin_lock(&sbi->stat_lock);
 266                 if (t > (unsigned long)(sbi->user_block_count -
 267                                 F2FS_OPTION(sbi).root_reserved_blocks)) {
 268                         spin_unlock(&sbi->stat_lock);
 269                         return -EINVAL;
 270                 }
 271                 *ui = t;
 272                 sbi->current_reserved_blocks = min(sbi->reserved_blocks,
 273                                 sbi->user_block_count - valid_user_blocks(sbi));
 274                 spin_unlock(&sbi->stat_lock);
 275                 return count;
 276         }
 277
 278         if (!strcmp(a->attr.name, "discard_granularity")) {
 279                 if (t == 0 || t > MAX_PLIST_NUM)
 280                         return -EINVAL;
 281                 if (t == *ui)
 282                         return count;
 283                 *ui = t;
 284                 return count;
 285         }
 286
 287         if (!strcmp(a->attr.name, "migration_granularity")) {
 288                 if (t == 0 || t > sbi->segs_per_sec)
 289                         return -EINVAL;
 290         }
 291
 292         if (!strcmp(a->attr.name, "trim_sections"))
 293                 return -EINVAL;
 294
 295         if (!strcmp(a->attr.name, "gc_urgent")) {
 296                 if (t >= 1) {
 297                         sbi->gc_mode = GC_URGENT;
 298                         if (sbi->gc_thread) {
 299                                 sbi->gc_thread->gc_wake = 1;
 300                                 wake_up_interruptible_all(
 301                                         &sbi->gc_thread->gc_wait_queue_head);
 302                                 wake_up_discard_thread(sbi, true);
 303                         }
 304                 } else {
 305                         sbi->gc_mode = GC_NORMAL;
 306                 }
 307                 return count;
 308         }
 309         if (!strcmp(a->attr.name, "gc_idle")) {
 310                 if (t == GC_IDLE_CB)
 311                         sbi->gc_mode = GC_IDLE_CB;
 312                 else if (t == GC_IDLE_GREEDY)
 313                         sbi->gc_mode = GC_IDLE_GREEDY;
 314                 else
 315                         sbi->gc_mode = GC_NORMAL;
 316                 return count;
 317         }
 318
 319
 320         if (!strcmp(a->attr.name, "iostat_enable")) {
 321                 sbi->iostat_enable = !!t;
 322                 if (!sbi->iostat_enable)
 323                         f2fs_reset_iostat(sbi);
 324                 return count;
 325         }
 326
 327         *ui = (unsigned int)t;
 328
 329         return count;
 330 }
 331
 332 static ssize_t f2fs_sbi_store(struct f2fs_attr *a,
 333                         struct f2fs_sb_info *sbi,
 334                         const char *buf, size_t count)
 335 {
 336         ssize_t ret;
 337         bool gc_entry = (!strcmp(a->attr.name, "gc_urgent") ||
 338                                         a->struct_type == GC_THREAD);
 339
 340         if (gc_entry) {
 341                 if (!down_read_trylock(&sbi->sb->s_umount))
 342                         return -EAGAIN;
 343         }
 344         ret = __sbi_store(a, sbi, buf, count);
 345         if (gc_entry)
 346                 up_read(&sbi->sb->s_umount);
 347
 348         return ret;
 349 }
 350
 351 static ssize_t f2fs_attr_show(struct kobject *kobj,
 352                                 struct attribute *attr, char *buf)
 353 {
 354         struct f2fs_sb_info *sbi = container_of(kobj, struct f2fs_sb_info,
 355                                                                 s_kobj);
 356         struct f2fs_attr *a = container_of(attr, struct f2fs_attr, attr);
 357
 358         return a->show ? a->show(a, sbi, buf) : 0;
 359 }
 360
 361 static ssize_t f2fs_attr_store(struct kobject *kobj, struct attribute *attr,
 362                                                 const char *buf, size_t len)
 363 {
 364         struct f2fs_sb_info *sbi = container_of(kobj, struct f2fs_sb_info,
 365                                                                         s_kobj);
 366         struct f2fs_attr *a = container_of(attr, struct f2fs_attr, attr);
 367
 368         return a->store ? a->store(a, sbi, buf, len) : 0;
 369 }
 370
 371 static void f2fs_sb_release(struct kobject *kobj)
 372 {
 373         struct f2fs_sb_info *sbi = container_of(kobj, struct f2fs_sb_info,
 374                                                                 s_kobj);
 375         complete(&sbi->s_kobj_unregister);
 376 }
 377
 378 enum feat_id {
 379         FEAT_CRYPTO = 0,
 380         FEAT_BLKZONED,
 381         FEAT_ATOMIC_WRITE,
 382         FEAT_EXTRA_ATTR,
 383         FEAT_PROJECT_QUOTA,
 384         FEAT_INODE_CHECKSUM,
 385         FEAT_FLEXIBLE_INLINE_XATTR,
 386         FEAT_QUOTA_INO,
 387         FEAT_INODE_CRTIME,
 388         FEAT_LOST_FOUND,
 389         FEAT_VERITY,
 390         FEAT_SB_CHECKSUM,
 391         FEAT_CASEFOLD,
 392 };
 393
 394 static ssize_t f2fs_feature_show(struct f2fs_attr *a,
 395                 struct f2fs_sb_info *sbi, char *buf)
 396 {
 397         switch (a->id) {
 398         case FEAT_CRYPTO:
 399         case FEAT_BLKZONED:
 400         case FEAT_ATOMIC_WRITE:
 401         case FEAT_EXTRA_ATTR:
 402         case FEAT_PROJECT_QUOTA:
 403         case FEAT_INODE_CHECKSUM:
 404         case FEAT_FLEXIBLE_INLINE_XATTR:
 405         case FEAT_QUOTA_INO:
 406         case FEAT_INODE_CRTIME:
 407         case FEAT_LOST_FOUND:
 408         case FEAT_VERITY:
 409         case FEAT_SB_CHECKSUM:
 410         case FEAT_CASEFOLD:
 411                 return snprintf(buf, PAGE_SIZE, "supported\n");
 412         }
 413         return 0;
 414 }
 415
 416 #define F2FS_ATTR_OFFSET(_struct_type, _name, _mode, _show, _store, _offset) \
 417 static struct f2fs_attr f2fs_attr_##_name = {                   \
 418         .attr = {.name = __stringify(_name), .mode = _mode },   \
 419         .show   = _show,                                        \
 420         .store  = _store,                                       \
 421         .struct_type = _struct_type,                            \
 422         .offset = _offset                                       \
 423 }
 424
 425 #define F2FS_RW_ATTR(struct_type, struct_name, name, elname)    \
 426         F2FS_ATTR_OFFSET(struct_type, name, 0644,               \
 427                 f2fs_sbi_show, f2fs_sbi_store,                  \
 428                 offsetof(struct struct_name, elname))
 429
 430 #define F2FS_GENERAL_RO_ATTR(name) \
 431 static struct f2fs_attr f2fs_attr_##name = __ATTR(name, 0444, name##_show, NULL)
 432
 433 #define F2FS_FEATURE_RO_ATTR(_name, _id)                        \
 434 static struct f2fs_attr f2fs_attr_##_name = {                   \
 435         .attr = {.name = __stringify(_name), .mode = 0444 },    \
 436         .show   = f2fs_feature_show,                            \
 437         .id     = _id,                                          \
 438 }
 439
 440 F2FS_RW_ATTR(GC_THREAD, f2fs_gc_kthread, gc_urgent_sleep_time,
 441                                                         urgent_sleep_time);
 442 F2FS_RW_ATTR(GC_THREAD, f2fs_gc_kthread, gc_min_sleep_time, min_sleep_time);
 443 F2FS_RW_ATTR(GC_THREAD, f2fs_gc_kthread, gc_max_sleep_time, max_sleep_time);
 444 F2FS_RW_ATTR(GC_THREAD, f2fs_gc_kthread, gc_no_gc_sleep_time, no_gc_sleep_time);
 445 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, gc_idle, gc_mode);
 446 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, gc_urgent, gc_mode);
 447 F2FS_RW_ATTR(SM_INFO, f2fs_sm_info, reclaim_segments, rec_prefree_segments);
 448 F2FS_RW_ATTR(SM_INFO, f2fs_sm_info, main_blkaddr, main_blkaddr);
 449 F2FS_RW_ATTR(DCC_INFO, discard_cmd_control, max_small_discards, max_discards);
 450 F2FS_RW_ATTR(DCC_INFO, discard_cmd_control, discard_granularity, discard_granularity);
 451 F2FS_RW_ATTR(RESERVED_BLOCKS, f2fs_sb_info, reserved_blocks, reserved_blocks);
 452 F2FS_RW_ATTR(SM_INFO, f2fs_sm_info, batched_trim_sections, trim_sections);
 453 F2FS_RW_ATTR(SM_INFO, f2fs_sm_info, ipu_policy, ipu_policy);
 454 F2FS_RW_ATTR(SM_INFO, f2fs_sm_info, min_ipu_util, min_ipu_util);
 455 F2FS_RW_ATTR(SM_INFO, f2fs_sm_info, min_fsync_blocks, min_fsync_blocks);
 456 F2FS_RW_ATTR(SM_INFO, f2fs_sm_info, min_seq_blocks, min_seq_blocks);
 457 F2FS_RW_ATTR(SM_INFO, f2fs_sm_info, min_hot_blocks, min_hot_blocks);
 458 F2FS_RW_ATTR(SM_INFO, f2fs_sm_info, min_ssr_sections, min_ssr_sections);
 459 F2FS_RW_ATTR(NM_INFO, f2fs_nm_info, ram_thresh, ram_thresh);
 460 F2FS_RW_ATTR(NM_INFO, f2fs_nm_info, ra_nid_pages, ra_nid_pages);
 461 F2FS_RW_ATTR(NM_INFO, f2fs_nm_info, dirty_nats_ratio, dirty_nats_ratio);
 462 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, max_victim_search, max_victim_search);
 463 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, migration_granularity, migration_granularity);
 464 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, dir_level, dir_level);
 465 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, cp_interval, interval_time[CP_TIME]);
 466 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, idle_interval, interval_time[REQ_TIME]);
 467 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, discard_idle_interval,
 468                                         interval_time[DISCARD_TIME]);
 469 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, gc_idle_interval, interval_time[GC_TIME]);
 470 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info,
 471                 umount_discard_timeout, interval_time[UMOUNT_DISCARD_TIMEOUT]);
 472 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, iostat_enable, iostat_enable);
 473 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, readdir_ra, readdir_ra);
 474 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, gc_pin_file_thresh, gc_pin_file_threshold);
 475 F2FS_RW_ATTR(F2FS_SBI, f2fs_super_block, extension_list, extension_list);
 476 #ifdef CONFIG_F2FS_FAULT_INJECTION
 477 F2FS_RW_ATTR(FAULT_INFO_RATE, f2fs_fault_info, inject_rate, inject_rate);
 478 F2FS_RW_ATTR(FAULT_INFO_TYPE, f2fs_fault_info, inject_type, inject_type);
 479 #endif
 480 F2FS_GENERAL_RO_ATTR(dirty_segments);
 481 F2FS_GENERAL_RO_ATTR(lifetime_write_kbytes);
 482 F2FS_GENERAL_RO_ATTR(features);
 483 F2FS_GENERAL_RO_ATTR(current_reserved_blocks);
 484 F2FS_GENERAL_RO_ATTR(unusable);
 485 F2FS_GENERAL_RO_ATTR(encoding);
 486
 487 #ifdef CONFIG_FS_ENCRYPTION
 488 F2FS_FEATURE_RO_ATTR(encryption, FEAT_CRYPTO);
 489 #endif
 490 #ifdef CONFIG_BLK_DEV_ZONED
 491 F2FS_FEATURE_RO_ATTR(block_zoned, FEAT_BLKZONED);
 492 #endif
 493 F2FS_FEATURE_RO_ATTR(atomic_write, FEAT_ATOMIC_WRITE);
 494 F2FS_FEATURE_RO_ATTR(extra_attr, FEAT_EXTRA_ATTR);
 495 F2FS_FEATURE_RO_ATTR(project_quota, FEAT_PROJECT_QUOTA);
 496 F2FS_FEATURE_RO_ATTR(inode_checksum, FEAT_INODE_CHECKSUM);
 497 F2FS_FEATURE_RO_ATTR(flexible_inline_xattr, FEAT_FLEXIBLE_INLINE_XATTR);
 498 F2FS_FEATURE_RO_ATTR(quota_ino, FEAT_QUOTA_INO);
 499 F2FS_FEATURE_RO_ATTR(inode_crtime, FEAT_INODE_CRTIME);
 500 F2FS_FEATURE_RO_ATTR(lost_found, FEAT_LOST_FOUND);
 501 #ifdef CONFIG_FS_VERITY
 502 F2FS_FEATURE_RO_ATTR(verity, FEAT_VERITY);
 503 #endif
 504 F2FS_FEATURE_RO_ATTR(sb_checksum, FEAT_SB_CHECKSUM);
 505 F2FS_FEATURE_RO_ATTR(casefold, FEAT_CASEFOLD);
 506
 507 #define ATTR_LIST(name) (&f2fs_attr_##name.attr)
 508 static struct attribute *f2fs_attrs[] = {
 509         ATTR_LIST(gc_urgent_sleep_time),
 510         ATTR_LIST(gc_min_sleep_time),
 511         ATTR_LIST(gc_max_sleep_time),
 512         ATTR_LIST(gc_no_gc_sleep_time),
 513         ATTR_LIST(gc_idle),
 514         ATTR_LIST(gc_urgent),
 515         ATTR_LIST(reclaim_segments),
 516         ATTR_LIST(main_blkaddr),
 517         ATTR_LIST(max_small_discards),
 518         ATTR_LIST(discard_granularity),
 519         ATTR_LIST(batched_trim_sections),
 520         ATTR_LIST(ipu_policy),
 521         ATTR_LIST(min_ipu_util),
 522         ATTR_LIST(min_fsync_blocks),
 523         ATTR_LIST(min_seq_blocks),
 524         ATTR_LIST(min_hot_blocks),
 525         ATTR_LIST(min_ssr_sections),
 526         ATTR_LIST(max_victim_search),
 527         ATTR_LIST(migration_granularity),
 528         ATTR_LIST(dir_level),
 529         ATTR_LIST(ram_thresh),
 530         ATTR_LIST(ra_nid_pages),
 531         ATTR_LIST(dirty_nats_ratio),
 532         ATTR_LIST(cp_interval),
 533         ATTR_LIST(idle_interval),
 534         ATTR_LIST(discard_idle_interval),
 535         ATTR_LIST(gc_idle_interval),
 536         ATTR_LIST(umount_discard_timeout),
 537         ATTR_LIST(iostat_enable),
 538         ATTR_LIST(readdir_ra),
 539         ATTR_LIST(gc_pin_file_thresh),
 540         ATTR_LIST(extension_list),
 541 #ifdef CONFIG_F2FS_FAULT_INJECTION
 542         ATTR_LIST(inject_rate),
 543         ATTR_LIST(inject_type),
 544 #endif
 545         ATTR_LIST(dirty_segments),
 546         ATTR_LIST(unusable),
 547         ATTR_LIST(lifetime_write_kbytes),
 548         ATTR_LIST(features),
 549         ATTR_LIST(reserved_blocks),
 550         ATTR_LIST(current_reserved_blocks),
 551         ATTR_LIST(encoding),
 552         NULL,
 553 };
 554 ATTRIBUTE_GROUPS(f2fs);
 555
 556 static struct attribute *f2fs_feat_attrs[] = {
 557 #ifdef CONFIG_FS_ENCRYPTION
 558         ATTR_LIST(encryption),
 559 #endif
 560 #ifdef CONFIG_BLK_DEV_ZONED
 561         ATTR_LIST(block_zoned),
 562 #endif
 563         ATTR_LIST(atomic_write),
 564         ATTR_LIST(extra_attr),
 565         ATTR_LIST(project_quota),
 566         ATTR_LIST(inode_checksum),
 567         ATTR_LIST(flexible_inline_xattr),
 568         ATTR_LIST(quota_ino),
 569         ATTR_LIST(inode_crtime),
 570         ATTR_LIST(lost_found),
 571 #ifdef CONFIG_FS_VERITY
 572         ATTR_LIST(verity),
 573 #endif
 574         ATTR_LIST(sb_checksum),
 575         ATTR_LIST(casefold),
 576         NULL,
 577 };
 578 ATTRIBUTE_GROUPS(f2fs_feat);
 579
 580 static const struct sysfs_ops f2fs_attr_ops = {
 581         .show   = f2fs_attr_show,
 582         .store  = f2fs_attr_store,
 583 };
 584
 585 static struct kobj_type f2fs_sb_ktype = {
 586         .default_groups = f2fs_groups,
 587         .sysfs_ops      = &f2fs_attr_ops,
 588         .release        = f2fs_sb_release,
 589 };
 590
 591 static struct kobj_type f2fs_ktype = {
 592         .sysfs_ops      = &f2fs_attr_ops,
 593 };
 594
 595 static struct kset f2fs_kset = {
 596         .kobj   = {.ktype = &f2fs_ktype},
 597 };
 598
 599 static struct kobj_type f2fs_feat_ktype = {
 600         .default_groups = f2fs_feat_groups,
 601         .sysfs_ops      = &f2fs_attr_ops,
 602 };
 603
 604 static struct kobject f2fs_feat = {
 605         .kset   = &f2fs_kset,
 606 };
 607
 608 static int __maybe_unused segment_info_seq_show(struct seq_file *seq,
 609                                                 void *offset)
 610 {
 611         struct super_block *sb = seq->private;
 612         struct f2fs_sb_info *sbi = F2FS_SB(sb);
 613         unsigned int total_segs =
 614                         le32_to_cpu(sbi->raw_super->segment_count_main);
 615         int i;
 616
 617         seq_puts(seq, "format: segment_type|valid_blocks\n"
 618                 "segment_type(0:HD, 1:WD, 2:CD, 3:HN, 4:WN, 5:CN)\n");
 619
 620         for (i = 0; i < total_segs; i++) {
 621                 struct seg_entry *se = get_seg_entry(sbi, i);
 622
 623                 if ((i % 10) == 0)
 624                         seq_printf(seq, "%-10d", i);
 625                 seq_printf(seq, "%d|%-3u", se->type, se->valid_blocks);
 626                 if ((i % 10) == 9 || i == (total_segs - 1))
 627                         seq_putc(seq, '\n');
 628                 else
 629                         seq_putc(seq, ' ');
 630         }
 631
 632         return 0;
 633 }
 634
 635 static int __maybe_unused segment_bits_seq_show(struct seq_file *seq,
 636                                                 void *offset)
 637 {
 638         struct super_block *sb = seq->private;
 639         struct f2fs_sb_info *sbi = F2FS_SB(sb);
 640         unsigned int total_segs =
 641                         le32_to_cpu(sbi->raw_super->segment_count_main);
 642         int i, j;
 643
 644         seq_puts(seq, "format: segment_type|valid_blocks|bitmaps\n"
 645                 "segment_type(0:HD, 1:WD, 2:CD, 3:HN, 4:WN, 5:CN)\n");
 646
 647         for (i = 0; i < total_segs; i++) {
 648                 struct seg_entry *se = get_seg_entry(sbi, i);
 649
 650                 seq_printf(seq, "%-10d", i);
 651                 seq_printf(seq, "%d|%-3u|", se->type, se->valid_blocks);
 652                 for (j = 0; j < SIT_VBLOCK_MAP_SIZE; j++)
 653                         seq_printf(seq, " %.2x", se->cur_valid_map[j]);
 654                 seq_putc(seq, '\n');
 655         }
 656         return 0;
 657 }
 658
 659 static int __maybe_unused iostat_info_seq_show(struct seq_file *seq,
 660                                                void *offset)
 661 {
 662         struct super_block *sb = seq->private;
 663         struct f2fs_sb_info *sbi = F2FS_SB(sb);
 664         time64_t now = ktime_get_real_seconds();
 665
 666         if (!sbi->iostat_enable)
 667                 return 0;
 668
 669         seq_printf(seq, "time:          %-16llu\n", now);
 670
 671         /* print app IOs */
 672         seq_printf(seq, "app buffered:  %-16llu\n",
 673                                 sbi->write_iostat[APP_BUFFERED_IO]);
 674         seq_printf(seq, "app direct:    %-16llu\n",
 675                                 sbi->write_iostat[APP_DIRECT_IO]);
 676         seq_printf(seq, "app mapped:    %-16llu\n",
 677                                 sbi->write_iostat[APP_MAPPED_IO]);
 678
 679         /* print fs IOs */
 680         seq_printf(seq, "fs data:       %-16llu\n",
 681                                 sbi->write_iostat[FS_DATA_IO]);
 682         seq_printf(seq, "fs node:       %-16llu\n",
 683                                 sbi->write_iostat[FS_NODE_IO]);
 684         seq_printf(seq, "fs meta:       %-16llu\n",
 685                                 sbi->write_iostat[FS_META_IO]);
 686         seq_printf(seq, "fs gc data:    %-16llu\n",
 687                                 sbi->write_iostat[FS_GC_DATA_IO]);
 688         seq_printf(seq, "fs gc node:    %-16llu\n",
 689                                 sbi->write_iostat[FS_GC_NODE_IO]);
 690         seq_printf(seq, "fs cp data:    %-16llu\n",
 691                                 sbi->write_iostat[FS_CP_DATA_IO]);
 692         seq_printf(seq, "fs cp node:    %-16llu\n",
 693                                 sbi->write_iostat[FS_CP_NODE_IO]);
 694         seq_printf(seq, "fs cp meta:    %-16llu\n",
 695                                 sbi->write_iostat[FS_CP_META_IO]);
 696         seq_printf(seq, "fs discard:    %-16llu\n",
 697                                 sbi->write_iostat[FS_DISCARD]);
 698
 699         return 0;
 700 }
 701
 702 static int __maybe_unused victim_bits_seq_show(struct seq_file *seq,
 703                                                 void *offset)
 704 {
 705         struct super_block *sb = seq->private;
 706         struct f2fs_sb_info *sbi = F2FS_SB(sb);
 707         struct dirty_seglist_info *dirty_i = DIRTY_I(sbi);
 708         int i;
 709
 710         seq_puts(seq, "format: victim_secmap bitmaps\n");
 711
 712         for (i = 0; i < MAIN_SECS(sbi); i++) {
 713                 if ((i % 10) == 0)
 714                         seq_printf(seq, "%-10d", i);
 715                 seq_printf(seq, "%d", test_bit(i, dirty_i->victim_secmap) ? 1 : 0);
 716                 if ((i % 10) == 9 || i == (MAIN_SECS(sbi) - 1))
 717                         seq_putc(seq, '\n');
 718                 else
 719                         seq_putc(seq, ' ');
 720         }
 721         return 0;
 722 }
 723
 724 int __init f2fs_init_sysfs(void)
 725 {
 726         int ret;
 727
 728         kobject_set_name(&f2fs_kset.kobj, "f2fs");
 729         f2fs_kset.kobj.parent = fs_kobj;
 730         ret = kset_register(&f2fs_kset);
 731         if (ret)
 732                 return ret;
 733
 734         ret = kobject_init_and_add(&f2fs_feat, &f2fs_feat_ktype,
 735                                    NULL, "features");
 736         if (ret)
 737                 kset_unregister(&f2fs_kset);
 738         else
 739                 f2fs_proc_root = proc_mkdir("fs/f2fs", NULL);
 740         return ret;
 741 }
 742
 743 void f2fs_exit_sysfs(void)
 744 {
 745         kobject_put(&f2fs_feat);
 746         kset_unregister(&f2fs_kset);
 747         remove_proc_entry("fs/f2fs", NULL);
 748         f2fs_proc_root = NULL;
 749 }
 750
 751 int f2fs_register_sysfs(struct f2fs_sb_info *sbi)
 752 {
 753         struct super_block *sb = sbi->sb;
 754         int err;
 755
 756         sbi->s_kobj.kset = &f2fs_kset;
 757         init_completion(&sbi->s_kobj_unregister);
 758         err = kobject_init_and_add(&sbi->s_kobj, &f2fs_sb_ktype, NULL,
 759                                 "%s", sb->s_id);
 760         if (err)
 761                 return err;
 762
 763         if (f2fs_proc_root)
 764                 sbi->s_proc = proc_mkdir(sb->s_id, f2fs_proc_root);
 765
 766         if (sbi->s_proc) {
 767                 proc_create_single_data("segment_info", S_IRUGO, sbi->s_proc,
 768                                 segment_info_seq_show, sb);
 769                 proc_create_single_data("segment_bits", S_IRUGO, sbi->s_proc,
 770                                 segment_bits_seq_show, sb);
 771                 proc_create_single_data("iostat_info", S_IRUGO, sbi->s_proc,
 772                                 iostat_info_seq_show, sb);
 773                 proc_create_single_data("victim_bits", S_IRUGO, sbi->s_proc,
 774                                 victim_bits_seq_show, sb);
 775         }
 776         return 0;
 777 }
 778
 779 void f2fs_unregister_sysfs(struct f2fs_sb_info *sbi)
 780 {
 781         if (sbi->s_proc) {
 782                 remove_proc_entry("iostat_info", sbi->s_proc);
 783                 remove_proc_entry("segment_info", sbi->s_proc);
 784                 remove_proc_entry("segment_bits", sbi->s_proc);
 785                 remove_proc_entry("victim_bits", sbi->s_proc);
 786                 remove_proc_entry(sbi->sb->s_id, f2fs_proc_root);
 787         }
 788         kobject_del(&sbi->s_kobj);
 789 }