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