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         if (f2fs_sb_has_compression(sbi))
 158                 len += snprintf(buf + len, PAGE_SIZE - len, "%s%s",
 159                                 len ? ", " : "", "compression");
 160         len += snprintf(buf + len, PAGE_SIZE - len, "%s%s",
 161                                 len ? ", " : "", "pin_file");
 162         len += snprintf(buf + len, PAGE_SIZE - len, "\n");
 163         return len;
 164 }
 165
 166 static ssize_t current_reserved_blocks_show(struct f2fs_attr *a,
 167                                         struct f2fs_sb_info *sbi, char *buf)
 168 {
 169         return snprintf(buf, PAGE_SIZE, "%u\n", sbi->current_reserved_blocks);
 170 }
 171
 172 static ssize_t f2fs_sbi_show(struct f2fs_attr *a,
 173                         struct f2fs_sb_info *sbi, char *buf)
 174 {
 175         unsigned char *ptr = NULL;
 176         unsigned int *ui;
 177
 178         ptr = __struct_ptr(sbi, a->struct_type);
 179         if (!ptr)
 180                 return -EINVAL;
 181
 182         if (!strcmp(a->attr.name, "extension_list")) {
 183                 __u8 (*extlist)[F2FS_EXTENSION_LEN] =
 184                                         sbi->raw_super->extension_list;
 185                 int cold_count = le32_to_cpu(sbi->raw_super->extension_count);
 186                 int hot_count = sbi->raw_super->hot_ext_count;
 187                 int len = 0, i;
 188
 189                 len += snprintf(buf + len, PAGE_SIZE - len,
 190                                                 "cold file extension:\n");
 191                 for (i = 0; i < cold_count; i++)
 192                         len += snprintf(buf + len, PAGE_SIZE - len, "%s\n",
 193                                                                 extlist[i]);
 194
 195                 len += snprintf(buf + len, PAGE_SIZE - len,
 196                                                 "hot file extension:\n");
 197                 for (i = cold_count; i < cold_count + hot_count; i++)
 198                         len += snprintf(buf + len, PAGE_SIZE - len, "%s\n",
 199                                                                 extlist[i]);
 200                 return len;
 201         }
 202
 203         ui = (unsigned int *)(ptr + a->offset);
 204
 205         return snprintf(buf, PAGE_SIZE, "%u\n", *ui);
 206 }
 207
 208 static ssize_t __sbi_store(struct f2fs_attr *a,
 209                         struct f2fs_sb_info *sbi,
 210                         const char *buf, size_t count)
 211 {
 212         unsigned char *ptr;
 213         unsigned long t;
 214         unsigned int *ui;
 215         ssize_t ret;
 216
 217         ptr = __struct_ptr(sbi, a->struct_type);
 218         if (!ptr)
 219                 return -EINVAL;
 220
 221         if (!strcmp(a->attr.name, "extension_list")) {
 222                 const char *name = strim((char *)buf);
 223                 bool set = true, hot;
 224
 225                 if (!strncmp(name, "[h]", 3))
 226                         hot = true;
 227                 else if (!strncmp(name, "[c]", 3))
 228                         hot = false;
 229                 else
 230                         return -EINVAL;
 231
 232                 name += 3;
 233
 234                 if (*name == '!') {
 235                         name++;
 236                         set = false;
 237                 }
 238
 239                 if (strlen(name) >= F2FS_EXTENSION_LEN)
 240                         return -EINVAL;
 241
 242                 down_write(&sbi->sb_lock);
 243
 244                 ret = f2fs_update_extension_list(sbi, name, hot, set);
 245                 if (ret)
 246                         goto out;
 247
 248                 ret = f2fs_commit_super(sbi, false);
 249                 if (ret)
 250                         f2fs_update_extension_list(sbi, name, hot, !set);
 251 out:
 252                 up_write(&sbi->sb_lock);
 253                 return ret ? ret : count;
 254         }
 255
 256         ui = (unsigned int *)(ptr + a->offset);
 257
 258         ret = kstrtoul(skip_spaces(buf), 0, &t);
 259         if (ret < 0)
 260                 return ret;
 261 #ifdef CONFIG_F2FS_FAULT_INJECTION
 262         if (a->struct_type == FAULT_INFO_TYPE && t >= (1 << FAULT_MAX))
 263                 return -EINVAL;
 264         if (a->struct_type == FAULT_INFO_RATE && t >= UINT_MAX)
 265                 return -EINVAL;
 266 #endif
 267         if (a->struct_type == RESERVED_BLOCKS) {
 268                 spin_lock(&sbi->stat_lock);
 269                 if (t > (unsigned long)(sbi->user_block_count -
 270                                 F2FS_OPTION(sbi).root_reserved_blocks)) {
 271                         spin_unlock(&sbi->stat_lock);
 272                         return -EINVAL;
 273                 }
 274                 *ui = t;
 275                 sbi->current_reserved_blocks = min(sbi->reserved_blocks,
 276                                 sbi->user_block_count - valid_user_blocks(sbi));
 277                 spin_unlock(&sbi->stat_lock);
 278                 return count;
 279         }
 280
 281         if (!strcmp(a->attr.name, "discard_granularity")) {
 282                 if (t == 0 || t > MAX_PLIST_NUM)
 283                         return -EINVAL;
 284                 if (t == *ui)
 285                         return count;
 286                 *ui = t;
 287                 return count;
 288         }
 289
 290         if (!strcmp(a->attr.name, "migration_granularity")) {
 291                 if (t == 0 || t > sbi->segs_per_sec)
 292                         return -EINVAL;
 293         }
 294
 295         if (!strcmp(a->attr.name, "trim_sections"))
 296                 return -EINVAL;
 297
 298         if (!strcmp(a->attr.name, "gc_urgent")) {
 299                 if (t >= 1) {
 300                         sbi->gc_mode = GC_URGENT;
 301                         if (sbi->gc_thread) {
 302                                 sbi->gc_thread->gc_wake = 1;
 303                                 wake_up_interruptible_all(
 304                                         &sbi->gc_thread->gc_wait_queue_head);
 305                                 wake_up_discard_thread(sbi, true);
 306                         }
 307                 } else {
 308                         sbi->gc_mode = GC_NORMAL;
 309                 }
 310                 return count;
 311         }
 312         if (!strcmp(a->attr.name, "gc_idle")) {
 313                 if (t == GC_IDLE_CB)
 314                         sbi->gc_mode = GC_IDLE_CB;
 315                 else if (t == GC_IDLE_GREEDY)
 316                         sbi->gc_mode = GC_IDLE_GREEDY;
 317                 else
 318                         sbi->gc_mode = GC_NORMAL;
 319                 return count;
 320         }
 321
 322
 323         if (!strcmp(a->attr.name, "iostat_enable")) {
 324                 sbi->iostat_enable = !!t;
 325                 if (!sbi->iostat_enable)
 326                         f2fs_reset_iostat(sbi);
 327                 return count;
 328         }
 329
 330         *ui = (unsigned int)t;
 331
 332         return count;
 333 }
 334
 335 static ssize_t f2fs_sbi_store(struct f2fs_attr *a,
 336                         struct f2fs_sb_info *sbi,
 337                         const char *buf, size_t count)
 338 {
 339         ssize_t ret;
 340         bool gc_entry = (!strcmp(a->attr.name, "gc_urgent") ||
 341                                         a->struct_type == GC_THREAD);
 342
 343         if (gc_entry) {
 344                 if (!down_read_trylock(&sbi->sb->s_umount))
 345                         return -EAGAIN;
 346         }
 347         ret = __sbi_store(a, sbi, buf, count);
 348         if (gc_entry)
 349                 up_read(&sbi->sb->s_umount);
 350
 351         return ret;
 352 }
 353
 354 static ssize_t f2fs_attr_show(struct kobject *kobj,
 355                                 struct attribute *attr, char *buf)
 356 {
 357         struct f2fs_sb_info *sbi = container_of(kobj, struct f2fs_sb_info,
 358                                                                 s_kobj);
 359         struct f2fs_attr *a = container_of(attr, struct f2fs_attr, attr);
 360
 361         return a->show ? a->show(a, sbi, buf) : 0;
 362 }
 363
 364 static ssize_t f2fs_attr_store(struct kobject *kobj, struct attribute *attr,
 365                                                 const char *buf, size_t len)
 366 {
 367         struct f2fs_sb_info *sbi = container_of(kobj, struct f2fs_sb_info,
 368                                                                         s_kobj);
 369         struct f2fs_attr *a = container_of(attr, struct f2fs_attr, attr);
 370
 371         return a->store ? a->store(a, sbi, buf, len) : 0;
 372 }
 373
 374 static void f2fs_sb_release(struct kobject *kobj)
 375 {
 376         struct f2fs_sb_info *sbi = container_of(kobj, struct f2fs_sb_info,
 377                                                                 s_kobj);
 378         complete(&sbi->s_kobj_unregister);
 379 }
 380
 381 enum feat_id {
 382         FEAT_CRYPTO = 0,
 383         FEAT_BLKZONED,
 384         FEAT_ATOMIC_WRITE,
 385         FEAT_EXTRA_ATTR,
 386         FEAT_PROJECT_QUOTA,
 387         FEAT_INODE_CHECKSUM,
 388         FEAT_FLEXIBLE_INLINE_XATTR,
 389         FEAT_QUOTA_INO,
 390         FEAT_INODE_CRTIME,
 391         FEAT_LOST_FOUND,
 392         FEAT_VERITY,
 393         FEAT_SB_CHECKSUM,
 394         FEAT_CASEFOLD,
 395         FEAT_COMPRESSION,
 396 };
 397
 398 static ssize_t f2fs_feature_show(struct f2fs_attr *a,
 399                 struct f2fs_sb_info *sbi, char *buf)
 400 {
 401         switch (a->id) {
 402         case FEAT_CRYPTO:
 403         case FEAT_BLKZONED:
 404         case FEAT_ATOMIC_WRITE:
 405         case FEAT_EXTRA_ATTR:
 406         case FEAT_PROJECT_QUOTA:
 407         case FEAT_INODE_CHECKSUM:
 408         case FEAT_FLEXIBLE_INLINE_XATTR:
 409         case FEAT_QUOTA_INO:
 410         case FEAT_INODE_CRTIME:
 411         case FEAT_LOST_FOUND:
 412         case FEAT_VERITY:
 413         case FEAT_SB_CHECKSUM:
 414         case FEAT_CASEFOLD:
 415         case FEAT_COMPRESSION:
 416                 return snprintf(buf, PAGE_SIZE, "supported\n");
 417         }
 418         return 0;
 419 }
 420
 421 #define F2FS_ATTR_OFFSET(_struct_type, _name, _mode, _show, _store, _offset) \
 422 static struct f2fs_attr f2fs_attr_##_name = {                   \
 423         .attr = {.name = __stringify(_name), .mode = _mode },   \
 424         .show   = _show,                                        \
 425         .store  = _store,                                       \
 426         .struct_type = _struct_type,                            \
 427         .offset = _offset                                       \
 428 }
 429
 430 #define F2FS_RW_ATTR(struct_type, struct_name, name, elname)    \
 431         F2FS_ATTR_OFFSET(struct_type, name, 0644,               \
 432                 f2fs_sbi_show, f2fs_sbi_store,                  \
 433                 offsetof(struct struct_name, elname))
 434
 435 #define F2FS_GENERAL_RO_ATTR(name) \
 436 static struct f2fs_attr f2fs_attr_##name = __ATTR(name, 0444, name##_show, NULL)
 437
 438 #define F2FS_FEATURE_RO_ATTR(_name, _id)                        \
 439 static struct f2fs_attr f2fs_attr_##_name = {                   \
 440         .attr = {.name = __stringify(_name), .mode = 0444 },    \
 441         .show   = f2fs_feature_show,                            \
 442         .id     = _id,                                          \
 443 }
 444
 445 F2FS_RW_ATTR(GC_THREAD, f2fs_gc_kthread, gc_urgent_sleep_time,
 446                                                         urgent_sleep_time);
 447 F2FS_RW_ATTR(GC_THREAD, f2fs_gc_kthread, gc_min_sleep_time, min_sleep_time);
 448 F2FS_RW_ATTR(GC_THREAD, f2fs_gc_kthread, gc_max_sleep_time, max_sleep_time);
 449 F2FS_RW_ATTR(GC_THREAD, f2fs_gc_kthread, gc_no_gc_sleep_time, no_gc_sleep_time);
 450 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, gc_idle, gc_mode);
 451 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, gc_urgent, gc_mode);
 452 F2FS_RW_ATTR(SM_INFO, f2fs_sm_info, reclaim_segments, rec_prefree_segments);
 453 F2FS_RW_ATTR(SM_INFO, f2fs_sm_info, main_blkaddr, main_blkaddr);
 454 F2FS_RW_ATTR(DCC_INFO, discard_cmd_control, max_small_discards, max_discards);
 455 F2FS_RW_ATTR(DCC_INFO, discard_cmd_control, discard_granularity, discard_granularity);
 456 F2FS_RW_ATTR(RESERVED_BLOCKS, f2fs_sb_info, reserved_blocks, reserved_blocks);
 457 F2FS_RW_ATTR(SM_INFO, f2fs_sm_info, batched_trim_sections, trim_sections);
 458 F2FS_RW_ATTR(SM_INFO, f2fs_sm_info, ipu_policy, ipu_policy);
 459 F2FS_RW_ATTR(SM_INFO, f2fs_sm_info, min_ipu_util, min_ipu_util);
 460 F2FS_RW_ATTR(SM_INFO, f2fs_sm_info, min_fsync_blocks, min_fsync_blocks);
 461 F2FS_RW_ATTR(SM_INFO, f2fs_sm_info, min_seq_blocks, min_seq_blocks);
 462 F2FS_RW_ATTR(SM_INFO, f2fs_sm_info, min_hot_blocks, min_hot_blocks);
 463 F2FS_RW_ATTR(SM_INFO, f2fs_sm_info, min_ssr_sections, min_ssr_sections);
 464 F2FS_RW_ATTR(NM_INFO, f2fs_nm_info, ram_thresh, ram_thresh);
 465 F2FS_RW_ATTR(NM_INFO, f2fs_nm_info, ra_nid_pages, ra_nid_pages);
 466 F2FS_RW_ATTR(NM_INFO, f2fs_nm_info, dirty_nats_ratio, dirty_nats_ratio);
 467 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, max_victim_search, max_victim_search);
 468 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, migration_granularity, migration_granularity);
 469 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, dir_level, dir_level);
 470 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, cp_interval, interval_time[CP_TIME]);
 471 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, idle_interval, interval_time[REQ_TIME]);
 472 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, discard_idle_interval,
 473                                         interval_time[DISCARD_TIME]);
 474 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, gc_idle_interval, interval_time[GC_TIME]);
 475 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info,
 476                 umount_discard_timeout, interval_time[UMOUNT_DISCARD_TIMEOUT]);
 477 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, iostat_enable, iostat_enable);
 478 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, readdir_ra, readdir_ra);
 479 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, gc_pin_file_thresh, gc_pin_file_threshold);
 480 F2FS_RW_ATTR(F2FS_SBI, f2fs_super_block, extension_list, extension_list);
 481 #ifdef CONFIG_F2FS_FAULT_INJECTION
 482 F2FS_RW_ATTR(FAULT_INFO_RATE, f2fs_fault_info, inject_rate, inject_rate);
 483 F2FS_RW_ATTR(FAULT_INFO_TYPE, f2fs_fault_info, inject_type, inject_type);
 484 #endif
 485 F2FS_GENERAL_RO_ATTR(dirty_segments);
 486 F2FS_GENERAL_RO_ATTR(lifetime_write_kbytes);
 487 F2FS_GENERAL_RO_ATTR(features);
 488 F2FS_GENERAL_RO_ATTR(current_reserved_blocks);
 489 F2FS_GENERAL_RO_ATTR(unusable);
 490 F2FS_GENERAL_RO_ATTR(encoding);
 491
 492 #ifdef CONFIG_FS_ENCRYPTION
 493 F2FS_FEATURE_RO_ATTR(encryption, FEAT_CRYPTO);
 494 #endif
 495 #ifdef CONFIG_BLK_DEV_ZONED
 496 F2FS_FEATURE_RO_ATTR(block_zoned, FEAT_BLKZONED);
 497 #endif
 498 F2FS_FEATURE_RO_ATTR(atomic_write, FEAT_ATOMIC_WRITE);
 499 F2FS_FEATURE_RO_ATTR(extra_attr, FEAT_EXTRA_ATTR);
 500 F2FS_FEATURE_RO_ATTR(project_quota, FEAT_PROJECT_QUOTA);
 501 F2FS_FEATURE_RO_ATTR(inode_checksum, FEAT_INODE_CHECKSUM);
 502 F2FS_FEATURE_RO_ATTR(flexible_inline_xattr, FEAT_FLEXIBLE_INLINE_XATTR);
 503 F2FS_FEATURE_RO_ATTR(quota_ino, FEAT_QUOTA_INO);
 504 F2FS_FEATURE_RO_ATTR(inode_crtime, FEAT_INODE_CRTIME);
 505 F2FS_FEATURE_RO_ATTR(lost_found, FEAT_LOST_FOUND);
 506 #ifdef CONFIG_FS_VERITY
 507 F2FS_FEATURE_RO_ATTR(verity, FEAT_VERITY);
 508 #endif
 509 F2FS_FEATURE_RO_ATTR(sb_checksum, FEAT_SB_CHECKSUM);
 510 F2FS_FEATURE_RO_ATTR(casefold, FEAT_CASEFOLD);
 511 F2FS_FEATURE_RO_ATTR(compression, FEAT_COMPRESSION);
 512
 513 #define ATTR_LIST(name) (&f2fs_attr_##name.attr)
 514 static struct attribute *f2fs_attrs[] = {
 515         ATTR_LIST(gc_urgent_sleep_time),
 516         ATTR_LIST(gc_min_sleep_time),
 517         ATTR_LIST(gc_max_sleep_time),
 518         ATTR_LIST(gc_no_gc_sleep_time),
 519         ATTR_LIST(gc_idle),
 520         ATTR_LIST(gc_urgent),
 521         ATTR_LIST(reclaim_segments),
 522         ATTR_LIST(main_blkaddr),
 523         ATTR_LIST(max_small_discards),
 524         ATTR_LIST(discard_granularity),
 525         ATTR_LIST(batched_trim_sections),
 526         ATTR_LIST(ipu_policy),
 527         ATTR_LIST(min_ipu_util),
 528         ATTR_LIST(min_fsync_blocks),
 529         ATTR_LIST(min_seq_blocks),
 530         ATTR_LIST(min_hot_blocks),
 531         ATTR_LIST(min_ssr_sections),
 532         ATTR_LIST(max_victim_search),
 533         ATTR_LIST(migration_granularity),
 534         ATTR_LIST(dir_level),
 535         ATTR_LIST(ram_thresh),
 536         ATTR_LIST(ra_nid_pages),
 537         ATTR_LIST(dirty_nats_ratio),
 538         ATTR_LIST(cp_interval),
 539         ATTR_LIST(idle_interval),
 540         ATTR_LIST(discard_idle_interval),
 541         ATTR_LIST(gc_idle_interval),
 542         ATTR_LIST(umount_discard_timeout),
 543         ATTR_LIST(iostat_enable),
 544         ATTR_LIST(readdir_ra),
 545         ATTR_LIST(gc_pin_file_thresh),
 546         ATTR_LIST(extension_list),
 547 #ifdef CONFIG_F2FS_FAULT_INJECTION
 548         ATTR_LIST(inject_rate),
 549         ATTR_LIST(inject_type),
 550 #endif
 551         ATTR_LIST(dirty_segments),
 552         ATTR_LIST(unusable),
 553         ATTR_LIST(lifetime_write_kbytes),
 554         ATTR_LIST(features),
 555         ATTR_LIST(reserved_blocks),
 556         ATTR_LIST(current_reserved_blocks),
 557         ATTR_LIST(encoding),
 558         NULL,
 559 };
 560 ATTRIBUTE_GROUPS(f2fs);
 561
 562 static struct attribute *f2fs_feat_attrs[] = {
 563 #ifdef CONFIG_FS_ENCRYPTION
 564         ATTR_LIST(encryption),
 565 #endif
 566 #ifdef CONFIG_BLK_DEV_ZONED
 567         ATTR_LIST(block_zoned),
 568 #endif
 569         ATTR_LIST(atomic_write),
 570         ATTR_LIST(extra_attr),
 571         ATTR_LIST(project_quota),
 572         ATTR_LIST(inode_checksum),
 573         ATTR_LIST(flexible_inline_xattr),
 574         ATTR_LIST(quota_ino),
 575         ATTR_LIST(inode_crtime),
 576         ATTR_LIST(lost_found),
 577 #ifdef CONFIG_FS_VERITY
 578         ATTR_LIST(verity),
 579 #endif
 580         ATTR_LIST(sb_checksum),
 581         ATTR_LIST(casefold),
 582         ATTR_LIST(compression),
 583         NULL,
 584 };
 585 ATTRIBUTE_GROUPS(f2fs_feat);
 586
 587 static const struct sysfs_ops f2fs_attr_ops = {
 588         .show   = f2fs_attr_show,
 589         .store  = f2fs_attr_store,
 590 };
 591
 592 static struct kobj_type f2fs_sb_ktype = {
 593         .default_groups = f2fs_groups,
 594         .sysfs_ops      = &f2fs_attr_ops,
 595         .release        = f2fs_sb_release,
 596 };
 597
 598 static struct kobj_type f2fs_ktype = {
 599         .sysfs_ops      = &f2fs_attr_ops,
 600 };
 601
 602 static struct kset f2fs_kset = {
 603         .kobj   = {.ktype = &f2fs_ktype},
 604 };
 605
 606 static struct kobj_type f2fs_feat_ktype = {
 607         .default_groups = f2fs_feat_groups,
 608         .sysfs_ops      = &f2fs_attr_ops,
 609 };
 610
 611 static struct kobject f2fs_feat = {
 612         .kset   = &f2fs_kset,
 613 };
 614
 615 static int __maybe_unused segment_info_seq_show(struct seq_file *seq,
 616                                                 void *offset)
 617 {
 618         struct super_block *sb = seq->private;
 619         struct f2fs_sb_info *sbi = F2FS_SB(sb);
 620         unsigned int total_segs =
 621                         le32_to_cpu(sbi->raw_super->segment_count_main);
 622         int i;
 623
 624         seq_puts(seq, "format: segment_type|valid_blocks\n"
 625                 "segment_type(0:HD, 1:WD, 2:CD, 3:HN, 4:WN, 5:CN)\n");
 626
 627         for (i = 0; i < total_segs; i++) {
 628                 struct seg_entry *se = get_seg_entry(sbi, i);
 629
 630                 if ((i % 10) == 0)
 631                         seq_printf(seq, "%-10d", i);
 632                 seq_printf(seq, "%d|%-3u", se->type, se->valid_blocks);
 633                 if ((i % 10) == 9 || i == (total_segs - 1))
 634                         seq_putc(seq, '\n');
 635                 else
 636                         seq_putc(seq, ' ');
 637         }
 638
 639         return 0;
 640 }
 641
 642 static int __maybe_unused segment_bits_seq_show(struct seq_file *seq,
 643                                                 void *offset)
 644 {
 645         struct super_block *sb = seq->private;
 646         struct f2fs_sb_info *sbi = F2FS_SB(sb);
 647         unsigned int total_segs =
 648                         le32_to_cpu(sbi->raw_super->segment_count_main);
 649         int i, j;
 650
 651         seq_puts(seq, "format: segment_type|valid_blocks|bitmaps\n"
 652                 "segment_type(0:HD, 1:WD, 2:CD, 3:HN, 4:WN, 5:CN)\n");
 653
 654         for (i = 0; i < total_segs; i++) {
 655                 struct seg_entry *se = get_seg_entry(sbi, i);
 656
 657                 seq_printf(seq, "%-10d", i);
 658                 seq_printf(seq, "%d|%-3u|", se->type, se->valid_blocks);
 659                 for (j = 0; j < SIT_VBLOCK_MAP_SIZE; j++)
 660                         seq_printf(seq, " %.2x", se->cur_valid_map[j]);
 661                 seq_putc(seq, '\n');
 662         }
 663         return 0;
 664 }
 665
 666 static int __maybe_unused iostat_info_seq_show(struct seq_file *seq,
 667                                                void *offset)
 668 {
 669         struct super_block *sb = seq->private;
 670         struct f2fs_sb_info *sbi = F2FS_SB(sb);
 671         time64_t now = ktime_get_real_seconds();
 672
 673         if (!sbi->iostat_enable)
 674                 return 0;
 675
 676         seq_printf(seq, "time:          %-16llu\n", now);
 677
 678         /* print app IOs */
 679         seq_printf(seq, "app buffered:  %-16llu\n",
 680                                 sbi->write_iostat[APP_BUFFERED_IO]);
 681         seq_printf(seq, "app direct:    %-16llu\n",
 682                                 sbi->write_iostat[APP_DIRECT_IO]);
 683         seq_printf(seq, "app mapped:    %-16llu\n",
 684                                 sbi->write_iostat[APP_MAPPED_IO]);
 685
 686         /* print fs IOs */
 687         seq_printf(seq, "fs data:       %-16llu\n",
 688                                 sbi->write_iostat[FS_DATA_IO]);
 689         seq_printf(seq, "fs node:       %-16llu\n",
 690                                 sbi->write_iostat[FS_NODE_IO]);
 691         seq_printf(seq, "fs meta:       %-16llu\n",
 692                                 sbi->write_iostat[FS_META_IO]);
 693         seq_printf(seq, "fs gc data:    %-16llu\n",
 694                                 sbi->write_iostat[FS_GC_DATA_IO]);
 695         seq_printf(seq, "fs gc node:    %-16llu\n",
 696                                 sbi->write_iostat[FS_GC_NODE_IO]);
 697         seq_printf(seq, "fs cp data:    %-16llu\n",
 698                                 sbi->write_iostat[FS_CP_DATA_IO]);
 699         seq_printf(seq, "fs cp node:    %-16llu\n",
 700                                 sbi->write_iostat[FS_CP_NODE_IO]);
 701         seq_printf(seq, "fs cp meta:    %-16llu\n",
 702                                 sbi->write_iostat[FS_CP_META_IO]);
 703         seq_printf(seq, "fs discard:    %-16llu\n",
 704                                 sbi->write_iostat[FS_DISCARD]);
 705
 706         return 0;
 707 }
 708
 709 static int __maybe_unused victim_bits_seq_show(struct seq_file *seq,
 710                                                 void *offset)
 711 {
 712         struct super_block *sb = seq->private;
 713         struct f2fs_sb_info *sbi = F2FS_SB(sb);
 714         struct dirty_seglist_info *dirty_i = DIRTY_I(sbi);
 715         int i;
 716
 717         seq_puts(seq, "format: victim_secmap bitmaps\n");
 718
 719         for (i = 0; i < MAIN_SECS(sbi); i++) {
 720                 if ((i % 10) == 0)
 721                         seq_printf(seq, "%-10d", i);
 722                 seq_printf(seq, "%d", test_bit(i, dirty_i->victim_secmap) ? 1 : 0);
 723                 if ((i % 10) == 9 || i == (MAIN_SECS(sbi) - 1))
 724                         seq_putc(seq, '\n');
 725                 else
 726                         seq_putc(seq, ' ');
 727         }
 728         return 0;
 729 }
 730
 731 int __init f2fs_init_sysfs(void)
 732 {
 733         int ret;
 734
 735         kobject_set_name(&f2fs_kset.kobj, "f2fs");
 736         f2fs_kset.kobj.parent = fs_kobj;
 737         ret = kset_register(&f2fs_kset);
 738         if (ret)
 739                 return ret;
 740
 741         ret = kobject_init_and_add(&f2fs_feat, &f2fs_feat_ktype,
 742                                    NULL, "features");
 743         if (ret)
 744                 kset_unregister(&f2fs_kset);
 745         else
 746                 f2fs_proc_root = proc_mkdir("fs/f2fs", NULL);
 747         return ret;
 748 }
 749
 750 void f2fs_exit_sysfs(void)
 751 {
 752         kobject_put(&f2fs_feat);
 753         kset_unregister(&f2fs_kset);
 754         remove_proc_entry("fs/f2fs", NULL);
 755         f2fs_proc_root = NULL;
 756 }
 757
 758 int f2fs_register_sysfs(struct f2fs_sb_info *sbi)
 759 {
 760         struct super_block *sb = sbi->sb;
 761         int err;
 762
 763         sbi->s_kobj.kset = &f2fs_kset;
 764         init_completion(&sbi->s_kobj_unregister);
 765         err = kobject_init_and_add(&sbi->s_kobj, &f2fs_sb_ktype, NULL,
 766                                 "%s", sb->s_id);
 767         if (err)
 768                 return err;
 769
 770         if (f2fs_proc_root)
 771                 sbi->s_proc = proc_mkdir(sb->s_id, f2fs_proc_root);
 772
 773         if (sbi->s_proc) {
 774                 proc_create_single_data("segment_info", S_IRUGO, sbi->s_proc,
 775                                 segment_info_seq_show, sb);
 776                 proc_create_single_data("segment_bits", S_IRUGO, sbi->s_proc,
 777                                 segment_bits_seq_show, sb);
 778                 proc_create_single_data("iostat_info", S_IRUGO, sbi->s_proc,
 779                                 iostat_info_seq_show, sb);
 780                 proc_create_single_data("victim_bits", S_IRUGO, sbi->s_proc,
 781                                 victim_bits_seq_show, sb);
 782         }
 783         return 0;
 784 }
 785
 786 void f2fs_unregister_sysfs(struct f2fs_sb_info *sbi)
 787 {
 788         if (sbi->s_proc) {
 789                 remove_proc_entry("iostat_info", sbi->s_proc);
 790                 remove_proc_entry("segment_info", sbi->s_proc);
 791                 remove_proc_entry("segment_bits", sbi->s_proc);
 792                 remove_proc_entry("victim_bits", sbi->s_proc);
 793                 remove_proc_entry(sbi->sb->s_id, f2fs_proc_root);
 794         }
 795         kobject_del(&sbi->s_kobj);
 796         kobject_put(&sbi->s_kobj);
 797 }