fs/f2fs/super.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 /*
   3  * fs/f2fs/super.c
   4  *
   5  * Copyright (c) 2012 Samsung Electronics Co., Ltd.
   6  *             http://www.samsung.com/
   7  */
   8 #include <linux/module.h>
   9 #include <linux/init.h>
  10 #include <linux/fs.h>
  11 #include <linux/statfs.h>
  12 #include <linux/buffer_head.h>
  13 #include <linux/backing-dev.h>
  14 #include <linux/kthread.h>
  15 #include <linux/parser.h>
  16 #include <linux/mount.h>
  17 #include <linux/seq_file.h>
  18 #include <linux/proc_fs.h>
  19 #include <linux/random.h>
  20 #include <linux/exportfs.h>
  21 #include <linux/blkdev.h>
  22 #include <linux/quotaops.h>
  23 #include <linux/f2fs_fs.h>
  24 #include <linux/sysfs.h>
  25 #include <linux/quota.h>
  26 #include <linux/unicode.h>
  27 #include <linux/part_stat.h>
  28
  29 #include "f2fs.h"
  30 #include "node.h"
  31 #include "segment.h"
  32 #include "xattr.h"
  33 #include "gc.h"
  34 #include "trace.h"
  35
  36 #define CREATE_TRACE_POINTS
  37 #include <trace/events/f2fs.h>
  38
  39 static struct kmem_cache *f2fs_inode_cachep;
  40
  41 #ifdef CONFIG_F2FS_FAULT_INJECTION
  42
  43 const char *f2fs_fault_name[FAULT_MAX] = {
  44         [FAULT_KMALLOC]         = "kmalloc",
  45         [FAULT_KVMALLOC]        = "kvmalloc",
  46         [FAULT_PAGE_ALLOC]      = "page alloc",
  47         [FAULT_PAGE_GET]        = "page get",
  48         [FAULT_ALLOC_BIO]       = "alloc bio",
  49         [FAULT_ALLOC_NID]       = "alloc nid",
  50         [FAULT_ORPHAN]          = "orphan",
  51         [FAULT_BLOCK]           = "no more block",
  52         [FAULT_DIR_DEPTH]       = "too big dir depth",
  53         [FAULT_EVICT_INODE]     = "evict_inode fail",
  54         [FAULT_TRUNCATE]        = "truncate fail",
  55         [FAULT_READ_IO]         = "read IO error",
  56         [FAULT_CHECKPOINT]      = "checkpoint error",
  57         [FAULT_DISCARD]         = "discard error",
  58         [FAULT_WRITE_IO]        = "write IO error",
  59 };
  60
  61 void f2fs_build_fault_attr(struct f2fs_sb_info *sbi, unsigned int rate,
  62                                                         unsigned int type)
  63 {
  64         struct f2fs_fault_info *ffi = &F2FS_OPTION(sbi).fault_info;
  65
  66         if (rate) {
  67                 atomic_set(&ffi->inject_ops, 0);
  68                 ffi->inject_rate = rate;
  69         }
  70
  71         if (type)
  72                 ffi->inject_type = type;
  73
  74         if (!rate && !type)
  75                 memset(ffi, 0, sizeof(struct f2fs_fault_info));
  76 }
  77 #endif
  78
  79 /* f2fs-wide shrinker description */
  80 static struct shrinker f2fs_shrinker_info = {
  81         .scan_objects = f2fs_shrink_scan,
  82         .count_objects = f2fs_shrink_count,
  83         .seeks = DEFAULT_SEEKS,
  84 };
  85
  86 enum {
  87         Opt_gc_background,
  88         Opt_disable_roll_forward,
  89         Opt_norecovery,
  90         Opt_discard,
  91         Opt_nodiscard,
  92         Opt_noheap,
  93         Opt_heap,
  94         Opt_user_xattr,
  95         Opt_nouser_xattr,
  96         Opt_acl,
  97         Opt_noacl,
  98         Opt_active_logs,
  99         Opt_disable_ext_identify,
 100         Opt_inline_xattr,
 101         Opt_noinline_xattr,
 102         Opt_inline_xattr_size,
 103         Opt_inline_data,
 104         Opt_inline_dentry,
 105         Opt_noinline_dentry,
 106         Opt_flush_merge,
 107         Opt_noflush_merge,
 108         Opt_nobarrier,
 109         Opt_fastboot,
 110         Opt_extent_cache,
 111         Opt_noextent_cache,
 112         Opt_noinline_data,
 113         Opt_data_flush,
 114         Opt_reserve_root,
 115         Opt_resgid,
 116         Opt_resuid,
 117         Opt_mode,
 118         Opt_io_size_bits,
 119         Opt_fault_injection,
 120         Opt_fault_type,
 121         Opt_lazytime,
 122         Opt_nolazytime,
 123         Opt_quota,
 124         Opt_noquota,
 125         Opt_usrquota,
 126         Opt_grpquota,
 127         Opt_prjquota,
 128         Opt_usrjquota,
 129         Opt_grpjquota,
 130         Opt_prjjquota,
 131         Opt_offusrjquota,
 132         Opt_offgrpjquota,
 133         Opt_offprjjquota,
 134         Opt_jqfmt_vfsold,
 135         Opt_jqfmt_vfsv0,
 136         Opt_jqfmt_vfsv1,
 137         Opt_whint,
 138         Opt_alloc,
 139         Opt_fsync,
 140         Opt_test_dummy_encryption,
 141         Opt_inlinecrypt,
 142         Opt_checkpoint_disable,
 143         Opt_checkpoint_disable_cap,
 144         Opt_checkpoint_disable_cap_perc,
 145         Opt_checkpoint_enable,
 146         Opt_compress_algorithm,
 147         Opt_compress_log_size,
 148         Opt_compress_extension,
 149         Opt_err,
 150 };
 151
 152 static match_table_t f2fs_tokens = {
 153         {Opt_gc_background, "background_gc=%s"},
 154         {Opt_disable_roll_forward, "disable_roll_forward"},
 155         {Opt_norecovery, "norecovery"},
 156         {Opt_discard, "discard"},
 157         {Opt_nodiscard, "nodiscard"},
 158         {Opt_noheap, "no_heap"},
 159         {Opt_heap, "heap"},
 160         {Opt_user_xattr, "user_xattr"},
 161         {Opt_nouser_xattr, "nouser_xattr"},
 162         {Opt_acl, "acl"},
 163         {Opt_noacl, "noacl"},
 164         {Opt_active_logs, "active_logs=%u"},
 165         {Opt_disable_ext_identify, "disable_ext_identify"},
 166         {Opt_inline_xattr, "inline_xattr"},
 167         {Opt_noinline_xattr, "noinline_xattr"},
 168         {Opt_inline_xattr_size, "inline_xattr_size=%u"},
 169         {Opt_inline_data, "inline_data"},
 170         {Opt_inline_dentry, "inline_dentry"},
 171         {Opt_noinline_dentry, "noinline_dentry"},
 172         {Opt_flush_merge, "flush_merge"},
 173         {Opt_noflush_merge, "noflush_merge"},
 174         {Opt_nobarrier, "nobarrier"},
 175         {Opt_fastboot, "fastboot"},
 176         {Opt_extent_cache, "extent_cache"},
 177         {Opt_noextent_cache, "noextent_cache"},
 178         {Opt_noinline_data, "noinline_data"},
 179         {Opt_data_flush, "data_flush"},
 180         {Opt_reserve_root, "reserve_root=%u"},
 181         {Opt_resgid, "resgid=%u"},
 182         {Opt_resuid, "resuid=%u"},
 183         {Opt_mode, "mode=%s"},
 184         {Opt_io_size_bits, "io_bits=%u"},
 185         {Opt_fault_injection, "fault_injection=%u"},
 186         {Opt_fault_type, "fault_type=%u"},
 187         {Opt_lazytime, "lazytime"},
 188         {Opt_nolazytime, "nolazytime"},
 189         {Opt_quota, "quota"},
 190         {Opt_noquota, "noquota"},
 191         {Opt_usrquota, "usrquota"},
 192         {Opt_grpquota, "grpquota"},
 193         {Opt_prjquota, "prjquota"},
 194         {Opt_usrjquota, "usrjquota=%s"},
 195         {Opt_grpjquota, "grpjquota=%s"},
 196         {Opt_prjjquota, "prjjquota=%s"},
 197         {Opt_offusrjquota, "usrjquota="},
 198         {Opt_offgrpjquota, "grpjquota="},
 199         {Opt_offprjjquota, "prjjquota="},
 200         {Opt_jqfmt_vfsold, "jqfmt=vfsold"},
 201         {Opt_jqfmt_vfsv0, "jqfmt=vfsv0"},
 202         {Opt_jqfmt_vfsv1, "jqfmt=vfsv1"},
 203         {Opt_whint, "whint_mode=%s"},
 204         {Opt_alloc, "alloc_mode=%s"},
 205         {Opt_fsync, "fsync_mode=%s"},
 206         {Opt_test_dummy_encryption, "test_dummy_encryption=%s"},
 207         {Opt_test_dummy_encryption, "test_dummy_encryption"},
 208         {Opt_inlinecrypt, "inlinecrypt"},
 209         {Opt_checkpoint_disable, "checkpoint=disable"},
 210         {Opt_checkpoint_disable_cap, "checkpoint=disable:%u"},
 211         {Opt_checkpoint_disable_cap_perc, "checkpoint=disable:%u%%"},
 212         {Opt_checkpoint_enable, "checkpoint=enable"},
 213         {Opt_compress_algorithm, "compress_algorithm=%s"},
 214         {Opt_compress_log_size, "compress_log_size=%u"},
 215         {Opt_compress_extension, "compress_extension=%s"},
 216         {Opt_err, NULL},
 217 };
 218
 219 void f2fs_printk(struct f2fs_sb_info *sbi, const char *fmt, ...)
 220 {
 221         struct va_format vaf;
 222         va_list args;
 223         int level;
 224
 225         va_start(args, fmt);
 226
 227         level = printk_get_level(fmt);
 228         vaf.fmt = printk_skip_level(fmt);
 229         vaf.va = &args;
 230         printk("%c%cF2FS-fs (%s): %pV\n",
 231                KERN_SOH_ASCII, level, sbi->sb->s_id, &vaf);
 232
 233         va_end(args);
 234 }
 235
 236 #ifdef CONFIG_UNICODE
 237 static const struct f2fs_sb_encodings {
 238         __u16 magic;
 239         char *name;
 240         char *version;
 241 } f2fs_sb_encoding_map[] = {
 242         {F2FS_ENC_UTF8_12_1, "utf8", "12.1.0"},
 243 };
 244
 245 static int f2fs_sb_read_encoding(const struct f2fs_super_block *sb,
 246                                  const struct f2fs_sb_encodings **encoding,
 247                                  __u16 *flags)
 248 {
 249         __u16 magic = le16_to_cpu(sb->s_encoding);
 250         int i;
 251
 252         for (i = 0; i < ARRAY_SIZE(f2fs_sb_encoding_map); i++)
 253                 if (magic == f2fs_sb_encoding_map[i].magic)
 254                         break;
 255
 256         if (i >= ARRAY_SIZE(f2fs_sb_encoding_map))
 257                 return -EINVAL;
 258
 259         *encoding = &f2fs_sb_encoding_map[i];
 260         *flags = le16_to_cpu(sb->s_encoding_flags);
 261
 262         return 0;
 263 }
 264 #endif
 265
 266 static inline void limit_reserve_root(struct f2fs_sb_info *sbi)
 267 {
 268         block_t limit = min((sbi->user_block_count << 1) / 1000,
 269                         sbi->user_block_count - sbi->reserved_blocks);
 270
 271         /* limit is 0.2% */
 272         if (test_opt(sbi, RESERVE_ROOT) &&
 273                         F2FS_OPTION(sbi).root_reserved_blocks > limit) {
 274                 F2FS_OPTION(sbi).root_reserved_blocks = limit;
 275                 f2fs_info(sbi, "Reduce reserved blocks for root = %u",
 276                           F2FS_OPTION(sbi).root_reserved_blocks);
 277         }
 278         if (!test_opt(sbi, RESERVE_ROOT) &&
 279                 (!uid_eq(F2FS_OPTION(sbi).s_resuid,
 280                                 make_kuid(&init_user_ns, F2FS_DEF_RESUID)) ||
 281                 !gid_eq(F2FS_OPTION(sbi).s_resgid,
 282                                 make_kgid(&init_user_ns, F2FS_DEF_RESGID))))
 283                 f2fs_info(sbi, "Ignore s_resuid=%u, s_resgid=%u w/o reserve_root",
 284                           from_kuid_munged(&init_user_ns,
 285                                            F2FS_OPTION(sbi).s_resuid),
 286                           from_kgid_munged(&init_user_ns,
 287                                            F2FS_OPTION(sbi).s_resgid));
 288 }
 289
 290 static inline void adjust_unusable_cap_perc(struct f2fs_sb_info *sbi)
 291 {
 292         if (!F2FS_OPTION(sbi).unusable_cap_perc)
 293                 return;
 294
 295         if (F2FS_OPTION(sbi).unusable_cap_perc == 100)
 296                 F2FS_OPTION(sbi).unusable_cap = sbi->user_block_count;
 297         else
 298                 F2FS_OPTION(sbi).unusable_cap = (sbi->user_block_count / 100) *
 299                                         F2FS_OPTION(sbi).unusable_cap_perc;
 300
 301         f2fs_info(sbi, "Adjust unusable cap for checkpoint=disable = %u / %u%%",
 302                         F2FS_OPTION(sbi).unusable_cap,
 303                         F2FS_OPTION(sbi).unusable_cap_perc);
 304 }
 305
 306 static void init_once(void *foo)
 307 {
 308         struct f2fs_inode_info *fi = (struct f2fs_inode_info *) foo;
 309
 310         inode_init_once(&fi->vfs_inode);
 311 }
 312
 313 #ifdef CONFIG_QUOTA
 314 static const char * const quotatypes[] = INITQFNAMES;
 315 #define QTYPE2NAME(t) (quotatypes[t])
 316 static int f2fs_set_qf_name(struct super_block *sb, int qtype,
 317                                                         substring_t *args)
 318 {
 319         struct f2fs_sb_info *sbi = F2FS_SB(sb);
 320         char *qname;
 321         int ret = -EINVAL;
 322
 323         if (sb_any_quota_loaded(sb) && !F2FS_OPTION(sbi).s_qf_names[qtype]) {
 324                 f2fs_err(sbi, "Cannot change journaled quota options when quota turned on");
 325                 return -EINVAL;
 326         }
 327         if (f2fs_sb_has_quota_ino(sbi)) {
 328                 f2fs_info(sbi, "QUOTA feature is enabled, so ignore qf_name");
 329                 return 0;
 330         }
 331
 332         qname = match_strdup(args);
 333         if (!qname) {
 334                 f2fs_err(sbi, "Not enough memory for storing quotafile name");
 335                 return -ENOMEM;
 336         }
 337         if (F2FS_OPTION(sbi).s_qf_names[qtype]) {
 338                 if (strcmp(F2FS_OPTION(sbi).s_qf_names[qtype], qname) == 0)
 339                         ret = 0;
 340                 else
 341                         f2fs_err(sbi, "%s quota file already specified",
 342                                  QTYPE2NAME(qtype));
 343                 goto errout;
 344         }
 345         if (strchr(qname, '/')) {
 346                 f2fs_err(sbi, "quotafile must be on filesystem root");
 347                 goto errout;
 348         }
 349         F2FS_OPTION(sbi).s_qf_names[qtype] = qname;
 350         set_opt(sbi, QUOTA);
 351         return 0;
 352 errout:
 353         kvfree(qname);
 354         return ret;
 355 }
 356
 357 static int f2fs_clear_qf_name(struct super_block *sb, int qtype)
 358 {
 359         struct f2fs_sb_info *sbi = F2FS_SB(sb);
 360
 361         if (sb_any_quota_loaded(sb) && F2FS_OPTION(sbi).s_qf_names[qtype]) {
 362                 f2fs_err(sbi, "Cannot change journaled quota options when quota turned on");
 363                 return -EINVAL;
 364         }
 365         kvfree(F2FS_OPTION(sbi).s_qf_names[qtype]);
 366         F2FS_OPTION(sbi).s_qf_names[qtype] = NULL;
 367         return 0;
 368 }
 369
 370 static int f2fs_check_quota_options(struct f2fs_sb_info *sbi)
 371 {
 372         /*
 373          * We do the test below only for project quotas. 'usrquota' and
 374          * 'grpquota' mount options are allowed even without quota feature
 375          * to support legacy quotas in quota files.
 376          */
 377         if (test_opt(sbi, PRJQUOTA) && !f2fs_sb_has_project_quota(sbi)) {
 378                 f2fs_err(sbi, "Project quota feature not enabled. Cannot enable project quota enforcement.");
 379                 return -1;
 380         }
 381         if (F2FS_OPTION(sbi).s_qf_names[USRQUOTA] ||
 382                         F2FS_OPTION(sbi).s_qf_names[GRPQUOTA] ||
 383                         F2FS_OPTION(sbi).s_qf_names[PRJQUOTA]) {
 384                 if (test_opt(sbi, USRQUOTA) &&
 385                                 F2FS_OPTION(sbi).s_qf_names[USRQUOTA])
 386                         clear_opt(sbi, USRQUOTA);
 387
 388                 if (test_opt(sbi, GRPQUOTA) &&
 389                                 F2FS_OPTION(sbi).s_qf_names[GRPQUOTA])
 390                         clear_opt(sbi, GRPQUOTA);
 391
 392                 if (test_opt(sbi, PRJQUOTA) &&
 393                                 F2FS_OPTION(sbi).s_qf_names[PRJQUOTA])
 394                         clear_opt(sbi, PRJQUOTA);
 395
 396                 if (test_opt(sbi, GRPQUOTA) || test_opt(sbi, USRQUOTA) ||
 397                                 test_opt(sbi, PRJQUOTA)) {
 398                         f2fs_err(sbi, "old and new quota format mixing");
 399                         return -1;
 400                 }
 401
 402                 if (!F2FS_OPTION(sbi).s_jquota_fmt) {
 403                         f2fs_err(sbi, "journaled quota format not specified");
 404                         return -1;
 405                 }
 406         }
 407
 408         if (f2fs_sb_has_quota_ino(sbi) && F2FS_OPTION(sbi).s_jquota_fmt) {
 409                 f2fs_info(sbi, "QUOTA feature is enabled, so ignore jquota_fmt");
 410                 F2FS_OPTION(sbi).s_jquota_fmt = 0;
 411         }
 412         return 0;
 413 }
 414 #endif
 415
 416 static int f2fs_set_test_dummy_encryption(struct super_block *sb,
 417                                           const char *opt,
 418                                           const substring_t *arg,
 419                                           bool is_remount)
 420 {
 421         struct f2fs_sb_info *sbi = F2FS_SB(sb);
 422 #ifdef CONFIG_FS_ENCRYPTION
 423         int err;
 424
 425         if (!f2fs_sb_has_encrypt(sbi)) {
 426                 f2fs_err(sbi, "Encrypt feature is off");
 427                 return -EINVAL;
 428         }
 429
 430         /*
 431          * This mount option is just for testing, and it's not worthwhile to
 432          * implement the extra complexity (e.g. RCU protection) that would be
 433          * needed to allow it to be set or changed during remount.  We do allow
 434          * it to be specified during remount, but only if there is no change.
 435          */
 436         if (is_remount && !F2FS_OPTION(sbi).dummy_enc_ctx.ctx) {
 437                 f2fs_warn(sbi, "Can't set test_dummy_encryption on remount");
 438                 return -EINVAL;
 439         }
 440         err = fscrypt_set_test_dummy_encryption(
 441                 sb, arg, &F2FS_OPTION(sbi).dummy_enc_ctx);
 442         if (err) {
 443                 if (err == -EEXIST)
 444                         f2fs_warn(sbi,
 445                                   "Can't change test_dummy_encryption on remount");
 446                 else if (err == -EINVAL)
 447                         f2fs_warn(sbi, "Value of option \"%s\" is unrecognized",
 448                                   opt);
 449                 else
 450                         f2fs_warn(sbi, "Error processing option \"%s\" [%d]",
 451                                   opt, err);
 452                 return -EINVAL;
 453         }
 454         f2fs_warn(sbi, "Test dummy encryption mode enabled");
 455 #else
 456         f2fs_warn(sbi, "Test dummy encryption mount option ignored");
 457 #endif
 458         return 0;
 459 }
 460
 461 static int parse_options(struct super_block *sb, char *options, bool is_remount)
 462 {
 463         struct f2fs_sb_info *sbi = F2FS_SB(sb);
 464         substring_t args[MAX_OPT_ARGS];
 465         unsigned char (*ext)[F2FS_EXTENSION_LEN];
 466         char *p, *name;
 467         int arg = 0, ext_cnt;
 468         kuid_t uid;
 469         kgid_t gid;
 470         int ret;
 471
 472         if (!options)
 473                 return 0;
 474
 475         while ((p = strsep(&options, ",")) != NULL) {
 476                 int token;
 477                 if (!*p)
 478                         continue;
 479                 /*
 480                  * Initialize args struct so we know whether arg was
 481                  * found; some options take optional arguments.
 482                  */
 483                 args[0].to = args[0].from = NULL;
 484                 token = match_token(p, f2fs_tokens, args);
 485
 486                 switch (token) {
 487                 case Opt_gc_background:
 488                         name = match_strdup(&args[0]);
 489
 490                         if (!name)
 491                                 return -ENOMEM;
 492                         if (!strcmp(name, "on")) {
 493                                 F2FS_OPTION(sbi).bggc_mode = BGGC_MODE_ON;
 494                         } else if (!strcmp(name, "off")) {
 495                                 F2FS_OPTION(sbi).bggc_mode = BGGC_MODE_OFF;
 496                         } else if (!strcmp(name, "sync")) {
 497                                 F2FS_OPTION(sbi).bggc_mode = BGGC_MODE_SYNC;
 498                         } else {
 499                                 kvfree(name);
 500                                 return -EINVAL;
 501                         }
 502                         kvfree(name);
 503                         break;
 504                 case Opt_disable_roll_forward:
 505                         set_opt(sbi, DISABLE_ROLL_FORWARD);
 506                         break;
 507                 case Opt_norecovery:
 508                         /* this option mounts f2fs with ro */
 509                         set_opt(sbi, NORECOVERY);
 510                         if (!f2fs_readonly(sb))
 511                                 return -EINVAL;
 512                         break;
 513                 case Opt_discard:
 514                         set_opt(sbi, DISCARD);
 515                         break;
 516                 case Opt_nodiscard:
 517                         if (f2fs_sb_has_blkzoned(sbi)) {
 518                                 f2fs_warn(sbi, "discard is required for zoned block devices");
 519                                 return -EINVAL;
 520                         }
 521                         clear_opt(sbi, DISCARD);
 522                         break;
 523                 case Opt_noheap:
 524                         set_opt(sbi, NOHEAP);
 525                         break;
 526                 case Opt_heap:
 527                         clear_opt(sbi, NOHEAP);
 528                         break;
 529 #ifdef CONFIG_F2FS_FS_XATTR
 530                 case Opt_user_xattr:
 531                         set_opt(sbi, XATTR_USER);
 532                         break;
 533                 case Opt_nouser_xattr:
 534                         clear_opt(sbi, XATTR_USER);
 535                         break;
 536                 case Opt_inline_xattr:
 537                         set_opt(sbi, INLINE_XATTR);
 538                         break;
 539                 case Opt_noinline_xattr:
 540                         clear_opt(sbi, INLINE_XATTR);
 541                         break;
 542                 case Opt_inline_xattr_size:
 543                         if (args->from && match_int(args, &arg))
 544                                 return -EINVAL;
 545                         set_opt(sbi, INLINE_XATTR_SIZE);
 546                         F2FS_OPTION(sbi).inline_xattr_size = arg;
 547                         break;
 548 #else
 549                 case Opt_user_xattr:
 550                         f2fs_info(sbi, "user_xattr options not supported");
 551                         break;
 552                 case Opt_nouser_xattr:
 553                         f2fs_info(sbi, "nouser_xattr options not supported");
 554                         break;
 555                 case Opt_inline_xattr:
 556                         f2fs_info(sbi, "inline_xattr options not supported");
 557                         break;
 558                 case Opt_noinline_xattr:
 559                         f2fs_info(sbi, "noinline_xattr options not supported");
 560                         break;
 561 #endif
 562 #ifdef CONFIG_F2FS_FS_POSIX_ACL
 563                 case Opt_acl:
 564                         set_opt(sbi, POSIX_ACL);
 565                         break;
 566                 case Opt_noacl:
 567                         clear_opt(sbi, POSIX_ACL);
 568                         break;
 569 #else
 570                 case Opt_acl:
 571                         f2fs_info(sbi, "acl options not supported");
 572                         break;
 573                 case Opt_noacl:
 574                         f2fs_info(sbi, "noacl options not supported");
 575                         break;
 576 #endif
 577                 case Opt_active_logs:
 578                         if (args->from && match_int(args, &arg))
 579                                 return -EINVAL;
 580                         if (arg != 2 && arg != 4 && arg != NR_CURSEG_TYPE)
 581                                 return -EINVAL;
 582                         F2FS_OPTION(sbi).active_logs = arg;
 583                         break;
 584                 case Opt_disable_ext_identify:
 585                         set_opt(sbi, DISABLE_EXT_IDENTIFY);
 586                         break;
 587                 case Opt_inline_data:
 588                         set_opt(sbi, INLINE_DATA);
 589                         break;
 590                 case Opt_inline_dentry:
 591                         set_opt(sbi, INLINE_DENTRY);
 592                         break;
 593                 case Opt_noinline_dentry:
 594                         clear_opt(sbi, INLINE_DENTRY);
 595                         break;
 596                 case Opt_flush_merge:
 597                         set_opt(sbi, FLUSH_MERGE);
 598                         break;
 599                 case Opt_noflush_merge:
 600                         clear_opt(sbi, FLUSH_MERGE);
 601                         break;
 602                 case Opt_nobarrier:
 603                         set_opt(sbi, NOBARRIER);
 604                         break;
 605                 case Opt_fastboot:
 606                         set_opt(sbi, FASTBOOT);
 607                         break;
 608                 case Opt_extent_cache:
 609                         set_opt(sbi, EXTENT_CACHE);
 610                         break;
 611                 case Opt_noextent_cache:
 612                         clear_opt(sbi, EXTENT_CACHE);
 613                         break;
 614                 case Opt_noinline_data:
 615                         clear_opt(sbi, INLINE_DATA);
 616                         break;
 617                 case Opt_data_flush:
 618                         set_opt(sbi, DATA_FLUSH);
 619                         break;
 620                 case Opt_reserve_root:
 621                         if (args->from && match_int(args, &arg))
 622                                 return -EINVAL;
 623                         if (test_opt(sbi, RESERVE_ROOT)) {
 624                                 f2fs_info(sbi, "Preserve previous reserve_root=%u",
 625                                           F2FS_OPTION(sbi).root_reserved_blocks);
 626                         } else {
 627                                 F2FS_OPTION(sbi).root_reserved_blocks = arg;
 628                                 set_opt(sbi, RESERVE_ROOT);
 629                         }
 630                         break;
 631                 case Opt_resuid:
 632                         if (args->from && match_int(args, &arg))
 633                                 return -EINVAL;
 634                         uid = make_kuid(current_user_ns(), arg);
 635                         if (!uid_valid(uid)) {
 636                                 f2fs_err(sbi, "Invalid uid value %d", arg);
 637                                 return -EINVAL;
 638                         }
 639                         F2FS_OPTION(sbi).s_resuid = uid;
 640                         break;
 641                 case Opt_resgid:
 642                         if (args->from && match_int(args, &arg))
 643                                 return -EINVAL;
 644                         gid = make_kgid(current_user_ns(), arg);
 645                         if (!gid_valid(gid)) {
 646                                 f2fs_err(sbi, "Invalid gid value %d", arg);
 647                                 return -EINVAL;
 648                         }
 649                         F2FS_OPTION(sbi).s_resgid = gid;
 650                         break;
 651                 case Opt_mode:
 652                         name = match_strdup(&args[0]);
 653
 654                         if (!name)
 655                                 return -ENOMEM;
 656                         if (!strcmp(name, "adaptive")) {
 657                                 if (f2fs_sb_has_blkzoned(sbi)) {
 658                                         f2fs_warn(sbi, "adaptive mode is not allowed with zoned block device feature");
 659                                         kvfree(name);
 660                                         return -EINVAL;
 661                                 }
 662                                 F2FS_OPTION(sbi).fs_mode = FS_MODE_ADAPTIVE;
 663                         } else if (!strcmp(name, "lfs")) {
 664                                 F2FS_OPTION(sbi).fs_mode = FS_MODE_LFS;
 665                         } else {
 666                                 kvfree(name);
 667                                 return -EINVAL;
 668                         }
 669                         kvfree(name);
 670                         break;
 671                 case Opt_io_size_bits:
 672                         if (args->from && match_int(args, &arg))
 673                                 return -EINVAL;
 674                         if (arg <= 0 || arg > __ilog2_u32(BIO_MAX_PAGES)) {
 675                                 f2fs_warn(sbi, "Not support %d, larger than %d",
 676                                           1 << arg, BIO_MAX_PAGES);
 677                                 return -EINVAL;
 678                         }
 679                         F2FS_OPTION(sbi).write_io_size_bits = arg;
 680                         break;
 681 #ifdef CONFIG_F2FS_FAULT_INJECTION
 682                 case Opt_fault_injection:
 683                         if (args->from && match_int(args, &arg))
 684                                 return -EINVAL;
 685                         f2fs_build_fault_attr(sbi, arg, F2FS_ALL_FAULT_TYPE);
 686                         set_opt(sbi, FAULT_INJECTION);
 687                         break;
 688
 689                 case Opt_fault_type:
 690                         if (args->from && match_int(args, &arg))
 691                                 return -EINVAL;
 692                         f2fs_build_fault_attr(sbi, 0, arg);
 693                         set_opt(sbi, FAULT_INJECTION);
 694                         break;
 695 #else
 696                 case Opt_fault_injection:
 697                         f2fs_info(sbi, "fault_injection options not supported");
 698                         break;
 699
 700                 case Opt_fault_type:
 701                         f2fs_info(sbi, "fault_type options not supported");
 702                         break;
 703 #endif
 704                 case Opt_lazytime:
 705                         sb->s_flags |= SB_LAZYTIME;
 706                         break;
 707                 case Opt_nolazytime:
 708                         sb->s_flags &= ~SB_LAZYTIME;
 709                         break;
 710 #ifdef CONFIG_QUOTA
 711                 case Opt_quota:
 712                 case Opt_usrquota:
 713                         set_opt(sbi, USRQUOTA);
 714                         break;
 715                 case Opt_grpquota:
 716                         set_opt(sbi, GRPQUOTA);
 717                         break;
 718                 case Opt_prjquota:
 719                         set_opt(sbi, PRJQUOTA);
 720                         break;
 721                 case Opt_usrjquota:
 722                         ret = f2fs_set_qf_name(sb, USRQUOTA, &args[0]);
 723                         if (ret)
 724                                 return ret;
 725                         break;
 726                 case Opt_grpjquota:
 727                         ret = f2fs_set_qf_name(sb, GRPQUOTA, &args[0]);
 728                         if (ret)
 729                                 return ret;
 730                         break;
 731                 case Opt_prjjquota:
 732                         ret = f2fs_set_qf_name(sb, PRJQUOTA, &args[0]);
 733                         if (ret)
 734                                 return ret;
 735                         break;
 736                 case Opt_offusrjquota:
 737                         ret = f2fs_clear_qf_name(sb, USRQUOTA);
 738                         if (ret)
 739                                 return ret;
 740                         break;
 741                 case Opt_offgrpjquota:
 742                         ret = f2fs_clear_qf_name(sb, GRPQUOTA);
 743                         if (ret)
 744                                 return ret;
 745                         break;
 746                 case Opt_offprjjquota:
 747                         ret = f2fs_clear_qf_name(sb, PRJQUOTA);
 748                         if (ret)
 749                                 return ret;
 750                         break;
 751                 case Opt_jqfmt_vfsold:
 752                         F2FS_OPTION(sbi).s_jquota_fmt = QFMT_VFS_OLD;
 753                         break;
 754                 case Opt_jqfmt_vfsv0:
 755                         F2FS_OPTION(sbi).s_jquota_fmt = QFMT_VFS_V0;
 756                         break;
 757                 case Opt_jqfmt_vfsv1:
 758                         F2FS_OPTION(sbi).s_jquota_fmt = QFMT_VFS_V1;
 759                         break;
 760                 case Opt_noquota:
 761                         clear_opt(sbi, QUOTA);
 762                         clear_opt(sbi, USRQUOTA);
 763                         clear_opt(sbi, GRPQUOTA);
 764                         clear_opt(sbi, PRJQUOTA);
 765                         break;
 766 #else
 767                 case Opt_quota:
 768                 case Opt_usrquota:
 769                 case Opt_grpquota:
 770                 case Opt_prjquota:
 771                 case Opt_usrjquota:
 772                 case Opt_grpjquota:
 773                 case Opt_prjjquota:
 774                 case Opt_offusrjquota:
 775                 case Opt_offgrpjquota:
 776                 case Opt_offprjjquota:
 777                 case Opt_jqfmt_vfsold:
 778                 case Opt_jqfmt_vfsv0:
 779                 case Opt_jqfmt_vfsv1:
 780                 case Opt_noquota:
 781                         f2fs_info(sbi, "quota operations not supported");
 782                         break;
 783 #endif
 784                 case Opt_whint:
 785                         name = match_strdup(&args[0]);
 786                         if (!name)
 787                                 return -ENOMEM;
 788                         if (!strcmp(name, "user-based")) {
 789                                 F2FS_OPTION(sbi).whint_mode = WHINT_MODE_USER;
 790                         } else if (!strcmp(name, "off")) {
 791                                 F2FS_OPTION(sbi).whint_mode = WHINT_MODE_OFF;
 792                         } else if (!strcmp(name, "fs-based")) {
 793                                 F2FS_OPTION(sbi).whint_mode = WHINT_MODE_FS;
 794                         } else {
 795                                 kvfree(name);
 796                                 return -EINVAL;
 797                         }
 798                         kvfree(name);
 799                         break;
 800                 case Opt_alloc:
 801                         name = match_strdup(&args[0]);
 802                         if (!name)
 803                                 return -ENOMEM;
 804
 805                         if (!strcmp(name, "default")) {
 806                                 F2FS_OPTION(sbi).alloc_mode = ALLOC_MODE_DEFAULT;
 807                         } else if (!strcmp(name, "reuse")) {
 808                                 F2FS_OPTION(sbi).alloc_mode = ALLOC_MODE_REUSE;
 809                         } else {
 810                                 kvfree(name);
 811                                 return -EINVAL;
 812                         }
 813                         kvfree(name);
 814                         break;
 815                 case Opt_fsync:
 816                         name = match_strdup(&args[0]);
 817                         if (!name)
 818                                 return -ENOMEM;
 819                         if (!strcmp(name, "posix")) {
 820                                 F2FS_OPTION(sbi).fsync_mode = FSYNC_MODE_POSIX;
 821                         } else if (!strcmp(name, "strict")) {
 822                                 F2FS_OPTION(sbi).fsync_mode = FSYNC_MODE_STRICT;
 823                         } else if (!strcmp(name, "nobarrier")) {
 824                                 F2FS_OPTION(sbi).fsync_mode =
 825                                                         FSYNC_MODE_NOBARRIER;
 826                         } else {
 827                                 kvfree(name);
 828                                 return -EINVAL;
 829                         }
 830                         kvfree(name);
 831                         break;
 832                 case Opt_test_dummy_encryption:
 833                         ret = f2fs_set_test_dummy_encryption(sb, p, &args[0],
 834                                                              is_remount);
 835                         if (ret)
 836                                 return ret;
 837                         break;
 838                 case Opt_inlinecrypt:
 839 #ifdef CONFIG_FS_ENCRYPTION_INLINE_CRYPT
 840                         sb->s_flags |= SB_INLINECRYPT;
 841 #else
 842                         f2fs_info(sbi, "inline encryption not supported");
 843 #endif
 844                         break;
 845                 case Opt_checkpoint_disable_cap_perc:
 846                         if (args->from && match_int(args, &arg))
 847                                 return -EINVAL;
 848                         if (arg < 0 || arg > 100)
 849                                 return -EINVAL;
 850                         F2FS_OPTION(sbi).unusable_cap_perc = arg;
 851                         set_opt(sbi, DISABLE_CHECKPOINT);
 852                         break;
 853                 case Opt_checkpoint_disable_cap:
 854                         if (args->from && match_int(args, &arg))
 855                                 return -EINVAL;
 856                         F2FS_OPTION(sbi).unusable_cap = arg;
 857                         set_opt(sbi, DISABLE_CHECKPOINT);
 858                         break;
 859                 case Opt_checkpoint_disable:
 860                         set_opt(sbi, DISABLE_CHECKPOINT);
 861                         break;
 862                 case Opt_checkpoint_enable:
 863                         clear_opt(sbi, DISABLE_CHECKPOINT);
 864                         break;
 865                 case Opt_compress_algorithm:
 866                         if (!f2fs_sb_has_compression(sbi)) {
 867                                 f2fs_err(sbi, "Compression feature if off");
 868                                 return -EINVAL;
 869                         }
 870                         name = match_strdup(&args[0]);
 871                         if (!name)
 872                                 return -ENOMEM;
 873                         if (!strcmp(name, "lzo")) {
 874                                 F2FS_OPTION(sbi).compress_algorithm =
 875                                                                 COMPRESS_LZO;
 876                         } else if (!strcmp(name, "lz4")) {
 877                                 F2FS_OPTION(sbi).compress_algorithm =
 878                                                                 COMPRESS_LZ4;
 879                         } else if (!strcmp(name, "zstd")) {
 880                                 F2FS_OPTION(sbi).compress_algorithm =
 881                                                                 COMPRESS_ZSTD;
 882                         } else if (!strcmp(name, "lzo-rle")) {
 883                                 F2FS_OPTION(sbi).compress_algorithm =
 884                                                                 COMPRESS_LZORLE;
 885                         } else {
 886                                 kfree(name);
 887                                 return -EINVAL;
 888                         }
 889                         kfree(name);
 890                         break;
 891                 case Opt_compress_log_size:
 892                         if (!f2fs_sb_has_compression(sbi)) {
 893                                 f2fs_err(sbi, "Compression feature is off");
 894                                 return -EINVAL;
 895                         }
 896                         if (args->from && match_int(args, &arg))
 897                                 return -EINVAL;
 898                         if (arg < MIN_COMPRESS_LOG_SIZE ||
 899                                 arg > MAX_COMPRESS_LOG_SIZE) {
 900                                 f2fs_err(sbi,
 901                                         "Compress cluster log size is out of range");
 902                                 return -EINVAL;
 903                         }
 904                         F2FS_OPTION(sbi).compress_log_size = arg;
 905                         break;
 906                 case Opt_compress_extension:
 907                         if (!f2fs_sb_has_compression(sbi)) {
 908                                 f2fs_err(sbi, "Compression feature is off");
 909                                 return -EINVAL;
 910                         }
 911                         name = match_strdup(&args[0]);
 912                         if (!name)
 913                                 return -ENOMEM;
 914
 915                         ext = F2FS_OPTION(sbi).extensions;
 916                         ext_cnt = F2FS_OPTION(sbi).compress_ext_cnt;
 917
 918                         if (strlen(name) >= F2FS_EXTENSION_LEN ||
 919                                 ext_cnt >= COMPRESS_EXT_NUM) {
 920                                 f2fs_err(sbi,
 921                                         "invalid extension length/number");
 922                                 kfree(name);
 923                                 return -EINVAL;
 924                         }
 925
 926                         strcpy(ext[ext_cnt], name);
 927                         F2FS_OPTION(sbi).compress_ext_cnt++;
 928                         kfree(name);
 929                         break;
 930                 default:
 931                         f2fs_err(sbi, "Unrecognized mount option \"%s\" or missing value",
 932                                  p);
 933                         return -EINVAL;
 934                 }
 935         }
 936 #ifdef CONFIG_QUOTA
 937         if (f2fs_check_quota_options(sbi))
 938                 return -EINVAL;
 939 #else
 940         if (f2fs_sb_has_quota_ino(sbi) && !f2fs_readonly(sbi->sb)) {
 941                 f2fs_info(sbi, "Filesystem with quota feature cannot be mounted RDWR without CONFIG_QUOTA");
 942                 return -EINVAL;
 943         }
 944         if (f2fs_sb_has_project_quota(sbi) && !f2fs_readonly(sbi->sb)) {
 945                 f2fs_err(sbi, "Filesystem with project quota feature cannot be mounted RDWR without CONFIG_QUOTA");
 946                 return -EINVAL;
 947         }
 948 #endif
 949 #ifndef CONFIG_UNICODE
 950         if (f2fs_sb_has_casefold(sbi)) {
 951                 f2fs_err(sbi,
 952                         "Filesystem with casefold feature cannot be mounted without CONFIG_UNICODE");
 953                 return -EINVAL;
 954         }
 955 #endif
 956
 957         if (F2FS_IO_SIZE_BITS(sbi) && !f2fs_lfs_mode(sbi)) {
 958                 f2fs_err(sbi, "Should set mode=lfs with %uKB-sized IO",
 959                          F2FS_IO_SIZE_KB(sbi));
 960                 return -EINVAL;
 961         }
 962
 963         if (test_opt(sbi, INLINE_XATTR_SIZE)) {
 964                 int min_size, max_size;
 965
 966                 if (!f2fs_sb_has_extra_attr(sbi) ||
 967                         !f2fs_sb_has_flexible_inline_xattr(sbi)) {
 968                         f2fs_err(sbi, "extra_attr or flexible_inline_xattr feature is off");
 969                         return -EINVAL;
 970                 }
 971                 if (!test_opt(sbi, INLINE_XATTR)) {
 972                         f2fs_err(sbi, "inline_xattr_size option should be set with inline_xattr option");
 973                         return -EINVAL;
 974                 }
 975
 976                 min_size = sizeof(struct f2fs_xattr_header) / sizeof(__le32);
 977                 max_size = MAX_INLINE_XATTR_SIZE;
 978
 979                 if (F2FS_OPTION(sbi).inline_xattr_size < min_size ||
 980                                 F2FS_OPTION(sbi).inline_xattr_size > max_size) {
 981                         f2fs_err(sbi, "inline xattr size is out of range: %d ~ %d",
 982                                  min_size, max_size);
 983                         return -EINVAL;
 984                 }
 985         }
 986
 987         if (test_opt(sbi, DISABLE_CHECKPOINT) && f2fs_lfs_mode(sbi)) {
 988                 f2fs_err(sbi, "LFS not compatible with checkpoint=disable\n");
 989                 return -EINVAL;
 990         }
 991
 992         /* Not pass down write hints if the number of active logs is lesser
 993          * than NR_CURSEG_TYPE.
 994          */
 995         if (F2FS_OPTION(sbi).active_logs != NR_CURSEG_TYPE)
 996                 F2FS_OPTION(sbi).whint_mode = WHINT_MODE_OFF;
 997         return 0;
 998 }
 999
1000 static struct inode *f2fs_alloc_inode(struct super_block *sb)
1001 {
1002         struct f2fs_inode_info *fi;
1003
1004         fi = kmem_cache_alloc(f2fs_inode_cachep, GFP_F2FS_ZERO);
1005         if (!fi)
1006                 return NULL;
1007
1008         init_once((void *) fi);
1009
1010         /* Initialize f2fs-specific inode info */
1011         atomic_set(&fi->dirty_pages, 0);
1012         init_rwsem(&fi->i_sem);
1013         spin_lock_init(&fi->i_size_lock);
1014         INIT_LIST_HEAD(&fi->dirty_list);
1015         INIT_LIST_HEAD(&fi->gdirty_list);
1016         INIT_LIST_HEAD(&fi->inmem_ilist);
1017         INIT_LIST_HEAD(&fi->inmem_pages);
1018         mutex_init(&fi->inmem_lock);
1019         init_rwsem(&fi->i_gc_rwsem[READ]);
1020         init_rwsem(&fi->i_gc_rwsem[WRITE]);
1021         init_rwsem(&fi->i_mmap_sem);
1022         init_rwsem(&fi->i_xattr_sem);
1023
1024         /* Will be used by directory only */
1025         fi->i_dir_level = F2FS_SB(sb)->dir_level;
1026
1027         return &fi->vfs_inode;
1028 }
1029
1030 static int f2fs_drop_inode(struct inode *inode)
1031 {
1032         struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
1033         int ret;
1034
1035         /*
1036          * during filesystem shutdown, if checkpoint is disabled,
1037          * drop useless meta/node dirty pages.
1038          */
1039         if (unlikely(is_sbi_flag_set(sbi, SBI_CP_DISABLED))) {
1040                 if (inode->i_ino == F2FS_NODE_INO(sbi) ||
1041                         inode->i_ino == F2FS_META_INO(sbi)) {
1042                         trace_f2fs_drop_inode(inode, 1);
1043                         return 1;
1044                 }
1045         }
1046
1047         /*
1048          * This is to avoid a deadlock condition like below.
1049          * writeback_single_inode(inode)
1050          *  - f2fs_write_data_page
1051          *    - f2fs_gc -> iput -> evict
1052          *       - inode_wait_for_writeback(inode)
1053          */
1054         if ((!inode_unhashed(inode) && inode->i_state & I_SYNC)) {
1055                 if (!inode->i_nlink && !is_bad_inode(inode)) {
1056                         /* to avoid evict_inode call simultaneously */
1057                         atomic_inc(&inode->i_count);
1058                         spin_unlock(&inode->i_lock);
1059
1060                         /* some remained atomic pages should discarded */
1061                         if (f2fs_is_atomic_file(inode))
1062                                 f2fs_drop_inmem_pages(inode);
1063
1064                         /* should remain fi->extent_tree for writepage */
1065                         f2fs_destroy_extent_node(inode);
1066
1067                         sb_start_intwrite(inode->i_sb);
1068                         f2fs_i_size_write(inode, 0);
1069
1070                         f2fs_submit_merged_write_cond(F2FS_I_SB(inode),
1071                                         inode, NULL, 0, DATA);
1072                         truncate_inode_pages_final(inode->i_mapping);
1073
1074                         if (F2FS_HAS_BLOCKS(inode))
1075                                 f2fs_truncate(inode);
1076
1077                         sb_end_intwrite(inode->i_sb);
1078
1079                         spin_lock(&inode->i_lock);
1080                         atomic_dec(&inode->i_count);
1081                 }
1082                 trace_f2fs_drop_inode(inode, 0);
1083                 return 0;
1084         }
1085         ret = generic_drop_inode(inode);
1086         if (!ret)
1087                 ret = fscrypt_drop_inode(inode);
1088         trace_f2fs_drop_inode(inode, ret);
1089         return ret;
1090 }
1091
1092 int f2fs_inode_dirtied(struct inode *inode, bool sync)
1093 {
1094         struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
1095         int ret = 0;
1096
1097         spin_lock(&sbi->inode_lock[DIRTY_META]);
1098         if (is_inode_flag_set(inode, FI_DIRTY_INODE)) {
1099                 ret = 1;
1100         } else {
1101                 set_inode_flag(inode, FI_DIRTY_INODE);
1102                 stat_inc_dirty_inode(sbi, DIRTY_META);
1103         }
1104         if (sync && list_empty(&F2FS_I(inode)->gdirty_list)) {
1105                 list_add_tail(&F2FS_I(inode)->gdirty_list,
1106                                 &sbi->inode_list[DIRTY_META]);
1107                 inc_page_count(sbi, F2FS_DIRTY_IMETA);
1108         }
1109         spin_unlock(&sbi->inode_lock[DIRTY_META]);
1110         return ret;
1111 }
1112
1113 void f2fs_inode_synced(struct inode *inode)
1114 {
1115         struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
1116
1117         spin_lock(&sbi->inode_lock[DIRTY_META]);
1118         if (!is_inode_flag_set(inode, FI_DIRTY_INODE)) {
1119                 spin_unlock(&sbi->inode_lock[DIRTY_META]);
1120                 return;
1121         }
1122         if (!list_empty(&F2FS_I(inode)->gdirty_list)) {
1123                 list_del_init(&F2FS_I(inode)->gdirty_list);
1124                 dec_page_count(sbi, F2FS_DIRTY_IMETA);
1125         }
1126         clear_inode_flag(inode, FI_DIRTY_INODE);
1127         clear_inode_flag(inode, FI_AUTO_RECOVER);
1128         stat_dec_dirty_inode(F2FS_I_SB(inode), DIRTY_META);
1129         spin_unlock(&sbi->inode_lock[DIRTY_META]);
1130 }
1131
1132 /*
1133  * f2fs_dirty_inode() is called from __mark_inode_dirty()
1134  *
1135  * We should call set_dirty_inode to write the dirty inode through write_inode.
1136  */
1137 static void f2fs_dirty_inode(struct inode *inode, int flags)
1138 {
1139         struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
1140
1141         if (inode->i_ino == F2FS_NODE_INO(sbi) ||
1142                         inode->i_ino == F2FS_META_INO(sbi))
1143                 return;
1144
1145         if (flags == I_DIRTY_TIME)
1146                 return;
1147
1148         if (is_inode_flag_set(inode, FI_AUTO_RECOVER))
1149                 clear_inode_flag(inode, FI_AUTO_RECOVER);
1150
1151         f2fs_inode_dirtied(inode, false);
1152 }
1153
1154 static void f2fs_free_inode(struct inode *inode)
1155 {
1156         fscrypt_free_inode(inode);
1157         kmem_cache_free(f2fs_inode_cachep, F2FS_I(inode));
1158 }
1159
1160 static void destroy_percpu_info(struct f2fs_sb_info *sbi)
1161 {
1162         percpu_counter_destroy(&sbi->alloc_valid_block_count);
1163         percpu_counter_destroy(&sbi->total_valid_inode_count);
1164 }
1165
1166 static void destroy_device_list(struct f2fs_sb_info *sbi)
1167 {
1168         int i;
1169
1170         for (i = 0; i < sbi->s_ndevs; i++) {
1171                 blkdev_put(FDEV(i).bdev, FMODE_EXCL);
1172 #ifdef CONFIG_BLK_DEV_ZONED
1173                 kvfree(FDEV(i).blkz_seq);
1174 #endif
1175         }
1176         kvfree(sbi->devs);
1177 }
1178
1179 static void f2fs_put_super(struct super_block *sb)
1180 {
1181         struct f2fs_sb_info *sbi = F2FS_SB(sb);
1182         int i;
1183         bool dropped;
1184
1185         f2fs_quota_off_umount(sb);
1186
1187         /* prevent remaining shrinker jobs */
1188         mutex_lock(&sbi->umount_mutex);
1189
1190         /*
1191          * We don't need to do checkpoint when superblock is clean.
1192          * But, the previous checkpoint was not done by umount, it needs to do
1193          * clean checkpoint again.
1194          */
1195         if ((is_sbi_flag_set(sbi, SBI_IS_DIRTY) ||
1196                         !is_set_ckpt_flags(sbi, CP_UMOUNT_FLAG))) {
1197                 struct cp_control cpc = {
1198                         .reason = CP_UMOUNT,
1199                 };
1200                 f2fs_write_checkpoint(sbi, &cpc);
1201         }
1202
1203         /* be sure to wait for any on-going discard commands */
1204         dropped = f2fs_issue_discard_timeout(sbi);
1205
1206         if ((f2fs_hw_support_discard(sbi) || f2fs_hw_should_discard(sbi)) &&
1207                                         !sbi->discard_blks && !dropped) {
1208                 struct cp_control cpc = {
1209                         .reason = CP_UMOUNT | CP_TRIMMED,
1210                 };
1211                 f2fs_write_checkpoint(sbi, &cpc);
1212         }
1213
1214         /*
1215          * normally superblock is clean, so we need to release this.
1216          * In addition, EIO will skip do checkpoint, we need this as well.
1217          */
1218         f2fs_release_ino_entry(sbi, true);
1219
1220         f2fs_leave_shrinker(sbi);
1221         mutex_unlock(&sbi->umount_mutex);
1222
1223         /* our cp_error case, we can wait for any writeback page */
1224         f2fs_flush_merged_writes(sbi);
1225
1226         f2fs_wait_on_all_pages(sbi, F2FS_WB_CP_DATA);
1227
1228         f2fs_bug_on(sbi, sbi->fsync_node_num);
1229
1230         iput(sbi->node_inode);
1231         sbi->node_inode = NULL;
1232
1233         iput(sbi->meta_inode);
1234         sbi->meta_inode = NULL;
1235
1236         /*
1237          * iput() can update stat information, if f2fs_write_checkpoint()
1238          * above failed with error.
1239          */
1240         f2fs_destroy_stats(sbi);
1241
1242         /* destroy f2fs internal modules */
1243         f2fs_destroy_node_manager(sbi);
1244         f2fs_destroy_segment_manager(sbi);
1245
1246         f2fs_destroy_post_read_wq(sbi);
1247
1248         kvfree(sbi->ckpt);
1249
1250         f2fs_unregister_sysfs(sbi);
1251
1252         sb->s_fs_info = NULL;
1253         if (sbi->s_chksum_driver)
1254                 crypto_free_shash(sbi->s_chksum_driver);
1255         kvfree(sbi->raw_super);
1256
1257         destroy_device_list(sbi);
1258         f2fs_destroy_xattr_caches(sbi);
1259         mempool_destroy(sbi->write_io_dummy);
1260 #ifdef CONFIG_QUOTA
1261         for (i = 0; i < MAXQUOTAS; i++)
1262                 kvfree(F2FS_OPTION(sbi).s_qf_names[i]);
1263 #endif
1264         fscrypt_free_dummy_context(&F2FS_OPTION(sbi).dummy_enc_ctx);
1265         destroy_percpu_info(sbi);
1266         for (i = 0; i < NR_PAGE_TYPE; i++)
1267                 kvfree(sbi->write_io[i]);
1268 #ifdef CONFIG_UNICODE
1269         utf8_unload(sbi->s_encoding);
1270 #endif
1271         kvfree(sbi);
1272 }
1273
1274 int f2fs_sync_fs(struct super_block *sb, int sync)
1275 {
1276         struct f2fs_sb_info *sbi = F2FS_SB(sb);
1277         int err = 0;
1278
1279         if (unlikely(f2fs_cp_error(sbi)))
1280                 return 0;
1281         if (unlikely(is_sbi_flag_set(sbi, SBI_CP_DISABLED)))
1282                 return 0;
1283
1284         trace_f2fs_sync_fs(sb, sync);
1285
1286         if (unlikely(is_sbi_flag_set(sbi, SBI_POR_DOING)))
1287                 return -EAGAIN;
1288
1289         if (sync) {
1290                 struct cp_control cpc;
1291
1292                 cpc.reason = __get_cp_reason(sbi);
1293
1294                 down_write(&sbi->gc_lock);
1295                 err = f2fs_write_checkpoint(sbi, &cpc);
1296                 up_write(&sbi->gc_lock);
1297         }
1298         f2fs_trace_ios(NULL, 1);
1299
1300         return err;
1301 }
1302
1303 static int f2fs_freeze(struct super_block *sb)
1304 {
1305         if (f2fs_readonly(sb))
1306                 return 0;
1307
1308         /* IO error happened before */
1309         if (unlikely(f2fs_cp_error(F2FS_SB(sb))))
1310                 return -EIO;
1311
1312         /* must be clean, since sync_filesystem() was already called */
1313         if (is_sbi_flag_set(F2FS_SB(sb), SBI_IS_DIRTY))
1314                 return -EINVAL;
1315         return 0;
1316 }
1317
1318 static int f2fs_unfreeze(struct super_block *sb)
1319 {
1320         return 0;
1321 }
1322
1323 #ifdef CONFIG_QUOTA
1324 static int f2fs_statfs_project(struct super_block *sb,
1325                                 kprojid_t projid, struct kstatfs *buf)
1326 {
1327         struct kqid qid;
1328         struct dquot *dquot;
1329         u64 limit;
1330         u64 curblock;
1331
1332         qid = make_kqid_projid(projid);
1333         dquot = dqget(sb, qid);
1334         if (IS_ERR(dquot))
1335                 return PTR_ERR(dquot);
1336         spin_lock(&dquot->dq_dqb_lock);
1337
1338         limit = min_not_zero(dquot->dq_dqb.dqb_bsoftlimit,
1339                                         dquot->dq_dqb.dqb_bhardlimit);
1340         if (limit)
1341                 limit >>= sb->s_blocksize_bits;
1342
1343         if (limit && buf->f_blocks > limit) {
1344                 curblock = (dquot->dq_dqb.dqb_curspace +
1345                             dquot->dq_dqb.dqb_rsvspace) >> sb->s_blocksize_bits;
1346                 buf->f_blocks = limit;
1347                 buf->f_bfree = buf->f_bavail =
1348                         (buf->f_blocks > curblock) ?
1349                          (buf->f_blocks - curblock) : 0;
1350         }
1351
1352         limit = min_not_zero(dquot->dq_dqb.dqb_isoftlimit,
1353                                         dquot->dq_dqb.dqb_ihardlimit);
1354
1355         if (limit && buf->f_files > limit) {
1356                 buf->f_files = limit;
1357                 buf->f_ffree =
1358                         (buf->f_files > dquot->dq_dqb.dqb_curinodes) ?
1359                          (buf->f_files - dquot->dq_dqb.dqb_curinodes) : 0;
1360         }
1361
1362         spin_unlock(&dquot->dq_dqb_lock);
1363         dqput(dquot);
1364         return 0;
1365 }
1366 #endif
1367
1368 static int f2fs_statfs(struct dentry *dentry, struct kstatfs *buf)
1369 {
1370         struct super_block *sb = dentry->d_sb;
1371         struct f2fs_sb_info *sbi = F2FS_SB(sb);
1372         u64 id = huge_encode_dev(sb->s_bdev->bd_dev);
1373         block_t total_count, user_block_count, start_count;
1374         u64 avail_node_count;
1375
1376         total_count = le64_to_cpu(sbi->raw_super->block_count);
1377         user_block_count = sbi->user_block_count;
1378         start_count = le32_to_cpu(sbi->raw_super->segment0_blkaddr);
1379         buf->f_type = F2FS_SUPER_MAGIC;
1380         buf->f_bsize = sbi->blocksize;
1381
1382         buf->f_blocks = total_count - start_count;
1383         buf->f_bfree = user_block_count - valid_user_blocks(sbi) -
1384                                                 sbi->current_reserved_blocks;
1385
1386         spin_lock(&sbi->stat_lock);
1387         if (unlikely(buf->f_bfree <= sbi->unusable_block_count))
1388                 buf->f_bfree = 0;
1389         else
1390                 buf->f_bfree -= sbi->unusable_block_count;
1391         spin_unlock(&sbi->stat_lock);
1392
1393         if (buf->f_bfree > F2FS_OPTION(sbi).root_reserved_blocks)
1394                 buf->f_bavail = buf->f_bfree -
1395                                 F2FS_OPTION(sbi).root_reserved_blocks;
1396         else
1397                 buf->f_bavail = 0;
1398
1399         avail_node_count = sbi->total_node_count - F2FS_RESERVED_NODE_NUM;
1400
1401         if (avail_node_count > user_block_count) {
1402                 buf->f_files = user_block_count;
1403                 buf->f_ffree = buf->f_bavail;
1404         } else {
1405                 buf->f_files = avail_node_count;
1406                 buf->f_ffree = min(avail_node_count - valid_node_count(sbi),
1407                                         buf->f_bavail);
1408         }
1409
1410         buf->f_namelen = F2FS_NAME_LEN;
1411         buf->f_fsid.val[0] = (u32)id;
1412         buf->f_fsid.val[1] = (u32)(id >> 32);
1413
1414 #ifdef CONFIG_QUOTA
1415         if (is_inode_flag_set(dentry->d_inode, FI_PROJ_INHERIT) &&
1416                         sb_has_quota_limits_enabled(sb, PRJQUOTA)) {
1417                 f2fs_statfs_project(sb, F2FS_I(dentry->d_inode)->i_projid, buf);
1418         }
1419 #endif
1420         return 0;
1421 }
1422
1423 static inline void f2fs_show_quota_options(struct seq_file *seq,
1424                                            struct super_block *sb)
1425 {
1426 #ifdef CONFIG_QUOTA
1427         struct f2fs_sb_info *sbi = F2FS_SB(sb);
1428
1429         if (F2FS_OPTION(sbi).s_jquota_fmt) {
1430                 char *fmtname = "";
1431
1432                 switch (F2FS_OPTION(sbi).s_jquota_fmt) {
1433                 case QFMT_VFS_OLD:
1434                         fmtname = "vfsold";
1435                         break;
1436                 case QFMT_VFS_V0:
1437                         fmtname = "vfsv0";
1438                         break;
1439                 case QFMT_VFS_V1:
1440                         fmtname = "vfsv1";
1441                         break;
1442                 }
1443                 seq_printf(seq, ",jqfmt=%s", fmtname);
1444         }
1445
1446         if (F2FS_OPTION(sbi).s_qf_names[USRQUOTA])
1447                 seq_show_option(seq, "usrjquota",
1448                         F2FS_OPTION(sbi).s_qf_names[USRQUOTA]);
1449
1450         if (F2FS_OPTION(sbi).s_qf_names[GRPQUOTA])
1451                 seq_show_option(seq, "grpjquota",
1452                         F2FS_OPTION(sbi).s_qf_names[GRPQUOTA]);
1453
1454         if (F2FS_OPTION(sbi).s_qf_names[PRJQUOTA])
1455                 seq_show_option(seq, "prjjquota",
1456                         F2FS_OPTION(sbi).s_qf_names[PRJQUOTA]);
1457 #endif
1458 }
1459
1460 static inline void f2fs_show_compress_options(struct seq_file *seq,
1461                                                         struct super_block *sb)
1462 {
1463         struct f2fs_sb_info *sbi = F2FS_SB(sb);
1464         char *algtype = "";
1465         int i;
1466
1467         if (!f2fs_sb_has_compression(sbi))
1468                 return;
1469
1470         switch (F2FS_OPTION(sbi).compress_algorithm) {
1471         case COMPRESS_LZO:
1472                 algtype = "lzo";
1473                 break;
1474         case COMPRESS_LZ4:
1475                 algtype = "lz4";
1476                 break;
1477         case COMPRESS_ZSTD:
1478                 algtype = "zstd";
1479                 break;
1480         case COMPRESS_LZORLE:
1481                 algtype = "lzo-rle";
1482                 break;
1483         }
1484         seq_printf(seq, ",compress_algorithm=%s", algtype);
1485
1486         seq_printf(seq, ",compress_log_size=%u",
1487                         F2FS_OPTION(sbi).compress_log_size);
1488
1489         for (i = 0; i < F2FS_OPTION(sbi).compress_ext_cnt; i++) {
1490                 seq_printf(seq, ",compress_extension=%s",
1491                         F2FS_OPTION(sbi).extensions[i]);
1492         }
1493 }
1494
1495 static int f2fs_show_options(struct seq_file *seq, struct dentry *root)
1496 {
1497         struct f2fs_sb_info *sbi = F2FS_SB(root->d_sb);
1498
1499         if (F2FS_OPTION(sbi).bggc_mode == BGGC_MODE_SYNC)
1500                 seq_printf(seq, ",background_gc=%s", "sync");
1501         else if (F2FS_OPTION(sbi).bggc_mode == BGGC_MODE_ON)
1502                 seq_printf(seq, ",background_gc=%s", "on");
1503         else if (F2FS_OPTION(sbi).bggc_mode == BGGC_MODE_OFF)
1504                 seq_printf(seq, ",background_gc=%s", "off");
1505
1506         if (test_opt(sbi, DISABLE_ROLL_FORWARD))
1507                 seq_puts(seq, ",disable_roll_forward");
1508         if (test_opt(sbi, NORECOVERY))
1509                 seq_puts(seq, ",norecovery");
1510         if (test_opt(sbi, DISCARD))
1511                 seq_puts(seq, ",discard");
1512         else
1513                 seq_puts(seq, ",nodiscard");
1514         if (test_opt(sbi, NOHEAP))
1515                 seq_puts(seq, ",no_heap");
1516         else
1517                 seq_puts(seq, ",heap");
1518 #ifdef CONFIG_F2FS_FS_XATTR
1519         if (test_opt(sbi, XATTR_USER))
1520                 seq_puts(seq, ",user_xattr");
1521         else
1522                 seq_puts(seq, ",nouser_xattr");
1523         if (test_opt(sbi, INLINE_XATTR))
1524                 seq_puts(seq, ",inline_xattr");
1525         else
1526                 seq_puts(seq, ",noinline_xattr");
1527         if (test_opt(sbi, INLINE_XATTR_SIZE))
1528                 seq_printf(seq, ",inline_xattr_size=%u",
1529                                         F2FS_OPTION(sbi).inline_xattr_size);
1530 #endif
1531 #ifdef CONFIG_F2FS_FS_POSIX_ACL
1532         if (test_opt(sbi, POSIX_ACL))
1533                 seq_puts(seq, ",acl");
1534         else
1535                 seq_puts(seq, ",noacl");
1536 #endif
1537         if (test_opt(sbi, DISABLE_EXT_IDENTIFY))
1538                 seq_puts(seq, ",disable_ext_identify");
1539         if (test_opt(sbi, INLINE_DATA))
1540                 seq_puts(seq, ",inline_data");
1541         else
1542                 seq_puts(seq, ",noinline_data");
1543         if (test_opt(sbi, INLINE_DENTRY))
1544                 seq_puts(seq, ",inline_dentry");
1545         else
1546                 seq_puts(seq, ",noinline_dentry");
1547         if (!f2fs_readonly(sbi->sb) && test_opt(sbi, FLUSH_MERGE))
1548                 seq_puts(seq, ",flush_merge");
1549         if (test_opt(sbi, NOBARRIER))
1550                 seq_puts(seq, ",nobarrier");
1551         if (test_opt(sbi, FASTBOOT))
1552                 seq_puts(seq, ",fastboot");
1553         if (test_opt(sbi, EXTENT_CACHE))
1554                 seq_puts(seq, ",extent_cache");
1555         else
1556                 seq_puts(seq, ",noextent_cache");
1557         if (test_opt(sbi, DATA_FLUSH))
1558                 seq_puts(seq, ",data_flush");
1559
1560         seq_puts(seq, ",mode=");
1561         if (F2FS_OPTION(sbi).fs_mode == FS_MODE_ADAPTIVE)
1562                 seq_puts(seq, "adaptive");
1563         else if (F2FS_OPTION(sbi).fs_mode == FS_MODE_LFS)
1564                 seq_puts(seq, "lfs");
1565         seq_printf(seq, ",active_logs=%u", F2FS_OPTION(sbi).active_logs);
1566         if (test_opt(sbi, RESERVE_ROOT))
1567                 seq_printf(seq, ",reserve_root=%u,resuid=%u,resgid=%u",
1568                                 F2FS_OPTION(sbi).root_reserved_blocks,
1569                                 from_kuid_munged(&init_user_ns,
1570                                         F2FS_OPTION(sbi).s_resuid),
1571                                 from_kgid_munged(&init_user_ns,
1572                                         F2FS_OPTION(sbi).s_resgid));
1573         if (F2FS_IO_SIZE_BITS(sbi))
1574                 seq_printf(seq, ",io_bits=%u",
1575                                 F2FS_OPTION(sbi).write_io_size_bits);
1576 #ifdef CONFIG_F2FS_FAULT_INJECTION
1577         if (test_opt(sbi, FAULT_INJECTION)) {
1578                 seq_printf(seq, ",fault_injection=%u",
1579                                 F2FS_OPTION(sbi).fault_info.inject_rate);
1580                 seq_printf(seq, ",fault_type=%u",
1581                                 F2FS_OPTION(sbi).fault_info.inject_type);
1582         }
1583 #endif
1584 #ifdef CONFIG_QUOTA
1585         if (test_opt(sbi, QUOTA))
1586                 seq_puts(seq, ",quota");
1587         if (test_opt(sbi, USRQUOTA))
1588                 seq_puts(seq, ",usrquota");
1589         if (test_opt(sbi, GRPQUOTA))
1590                 seq_puts(seq, ",grpquota");
1591         if (test_opt(sbi, PRJQUOTA))
1592                 seq_puts(seq, ",prjquota");
1593 #endif
1594         f2fs_show_quota_options(seq, sbi->sb);
1595         if (F2FS_OPTION(sbi).whint_mode == WHINT_MODE_USER)
1596                 seq_printf(seq, ",whint_mode=%s", "user-based");
1597         else if (F2FS_OPTION(sbi).whint_mode == WHINT_MODE_FS)
1598                 seq_printf(seq, ",whint_mode=%s", "fs-based");
1599
1600         fscrypt_show_test_dummy_encryption(seq, ',', sbi->sb);
1601
1602         if (sbi->sb->s_flags & SB_INLINECRYPT)
1603                 seq_puts(seq, ",inlinecrypt");
1604
1605         if (F2FS_OPTION(sbi).alloc_mode == ALLOC_MODE_DEFAULT)
1606                 seq_printf(seq, ",alloc_mode=%s", "default");
1607         else if (F2FS_OPTION(sbi).alloc_mode == ALLOC_MODE_REUSE)
1608                 seq_printf(seq, ",alloc_mode=%s", "reuse");
1609
1610         if (test_opt(sbi, DISABLE_CHECKPOINT))
1611                 seq_printf(seq, ",checkpoint=disable:%u",
1612                                 F2FS_OPTION(sbi).unusable_cap);
1613         if (F2FS_OPTION(sbi).fsync_mode == FSYNC_MODE_POSIX)
1614                 seq_printf(seq, ",fsync_mode=%s", "posix");
1615         else if (F2FS_OPTION(sbi).fsync_mode == FSYNC_MODE_STRICT)
1616                 seq_printf(seq, ",fsync_mode=%s", "strict");
1617         else if (F2FS_OPTION(sbi).fsync_mode == FSYNC_MODE_NOBARRIER)
1618                 seq_printf(seq, ",fsync_mode=%s", "nobarrier");
1619
1620         f2fs_show_compress_options(seq, sbi->sb);
1621         return 0;
1622 }
1623
1624 static void default_options(struct f2fs_sb_info *sbi)
1625 {
1626         /* init some FS parameters */
1627         F2FS_OPTION(sbi).active_logs = NR_CURSEG_TYPE;
1628         F2FS_OPTION(sbi).inline_xattr_size = DEFAULT_INLINE_XATTR_ADDRS;
1629         F2FS_OPTION(sbi).whint_mode = WHINT_MODE_OFF;
1630         F2FS_OPTION(sbi).alloc_mode = ALLOC_MODE_DEFAULT;
1631         F2FS_OPTION(sbi).fsync_mode = FSYNC_MODE_POSIX;
1632         F2FS_OPTION(sbi).s_resuid = make_kuid(&init_user_ns, F2FS_DEF_RESUID);
1633         F2FS_OPTION(sbi).s_resgid = make_kgid(&init_user_ns, F2FS_DEF_RESGID);
1634         F2FS_OPTION(sbi).compress_algorithm = COMPRESS_LZ4;
1635         F2FS_OPTION(sbi).compress_log_size = MIN_COMPRESS_LOG_SIZE;
1636         F2FS_OPTION(sbi).compress_ext_cnt = 0;
1637         F2FS_OPTION(sbi).bggc_mode = BGGC_MODE_ON;
1638
1639         sbi->sb->s_flags &= ~SB_INLINECRYPT;
1640
1641         set_opt(sbi, INLINE_XATTR);
1642         set_opt(sbi, INLINE_DATA);
1643         set_opt(sbi, INLINE_DENTRY);
1644         set_opt(sbi, EXTENT_CACHE);
1645         set_opt(sbi, NOHEAP);
1646         clear_opt(sbi, DISABLE_CHECKPOINT);
1647         F2FS_OPTION(sbi).unusable_cap = 0;
1648         sbi->sb->s_flags |= SB_LAZYTIME;
1649         set_opt(sbi, FLUSH_MERGE);
1650         set_opt(sbi, DISCARD);
1651         if (f2fs_sb_has_blkzoned(sbi))
1652                 F2FS_OPTION(sbi).fs_mode = FS_MODE_LFS;
1653         else
1654                 F2FS_OPTION(sbi).fs_mode = FS_MODE_ADAPTIVE;
1655
1656 #ifdef CONFIG_F2FS_FS_XATTR
1657         set_opt(sbi, XATTR_USER);
1658 #endif
1659 #ifdef CONFIG_F2FS_FS_POSIX_ACL
1660         set_opt(sbi, POSIX_ACL);
1661 #endif
1662
1663         f2fs_build_fault_attr(sbi, 0, 0);
1664 }
1665
1666 #ifdef CONFIG_QUOTA
1667 static int f2fs_enable_quotas(struct super_block *sb);
1668 #endif
1669
1670 static int f2fs_disable_checkpoint(struct f2fs_sb_info *sbi)
1671 {
1672         unsigned int s_flags = sbi->sb->s_flags;
1673         struct cp_control cpc;
1674         int err = 0;
1675         int ret;
1676         block_t unusable;
1677
1678         if (s_flags & SB_RDONLY) {
1679                 f2fs_err(sbi, "checkpoint=disable on readonly fs");
1680                 return -EINVAL;
1681         }
1682         sbi->sb->s_flags |= SB_ACTIVE;
1683
1684         f2fs_update_time(sbi, DISABLE_TIME);
1685
1686         while (!f2fs_time_over(sbi, DISABLE_TIME)) {
1687                 down_write(&sbi->gc_lock);
1688                 err = f2fs_gc(sbi, true, false, NULL_SEGNO);
1689                 if (err == -ENODATA) {
1690                         err = 0;
1691                         break;
1692                 }
1693                 if (err && err != -EAGAIN)
1694                         break;
1695         }
1696
1697         ret = sync_filesystem(sbi->sb);
1698         if (ret || err) {
1699                 err = ret ? ret: err;
1700                 goto restore_flag;
1701         }
1702
1703         unusable = f2fs_get_unusable_blocks(sbi);
1704         if (f2fs_disable_cp_again(sbi, unusable)) {
1705                 err = -EAGAIN;
1706                 goto restore_flag;
1707         }
1708
1709         down_write(&sbi->gc_lock);
1710         cpc.reason = CP_PAUSE;
1711         set_sbi_flag(sbi, SBI_CP_DISABLED);
1712         err = f2fs_write_checkpoint(sbi, &cpc);
1713         if (err)
1714                 goto out_unlock;
1715
1716         spin_lock(&sbi->stat_lock);
1717         sbi->unusable_block_count = unusable;
1718         spin_unlock(&sbi->stat_lock);
1719
1720 out_unlock:
1721         up_write(&sbi->gc_lock);
1722 restore_flag:
1723         sbi->sb->s_flags = s_flags;     /* Restore SB_RDONLY status */
1724         return err;
1725 }
1726
1727 static void f2fs_enable_checkpoint(struct f2fs_sb_info *sbi)
1728 {
1729         down_write(&sbi->gc_lock);
1730         f2fs_dirty_to_prefree(sbi);
1731
1732         clear_sbi_flag(sbi, SBI_CP_DISABLED);
1733         set_sbi_flag(sbi, SBI_IS_DIRTY);
1734         up_write(&sbi->gc_lock);
1735
1736         f2fs_sync_fs(sbi->sb, 1);
1737 }
1738
1739 static int f2fs_remount(struct super_block *sb, int *flags, char *data)
1740 {
1741         struct f2fs_sb_info *sbi = F2FS_SB(sb);
1742         struct f2fs_mount_info org_mount_opt;
1743         unsigned long old_sb_flags;
1744         int err;
1745         bool need_restart_gc = false;
1746         bool need_stop_gc = false;
1747         bool no_extent_cache = !test_opt(sbi, EXTENT_CACHE);
1748         bool disable_checkpoint = test_opt(sbi, DISABLE_CHECKPOINT);
1749         bool no_io_align = !F2FS_IO_ALIGNED(sbi);
1750         bool checkpoint_changed;
1751 #ifdef CONFIG_QUOTA
1752         int i, j;
1753 #endif
1754
1755         /*
1756          * Save the old mount options in case we
1757          * need to restore them.
1758          */
1759         org_mount_opt = sbi->mount_opt;
1760         old_sb_flags = sb->s_flags;
1761
1762 #ifdef CONFIG_QUOTA
1763         org_mount_opt.s_jquota_fmt = F2FS_OPTION(sbi).s_jquota_fmt;
1764         for (i = 0; i < MAXQUOTAS; i++) {
1765                 if (F2FS_OPTION(sbi).s_qf_names[i]) {
1766                         org_mount_opt.s_qf_names[i] =
1767                                 kstrdup(F2FS_OPTION(sbi).s_qf_names[i],
1768                                 GFP_KERNEL);
1769                         if (!org_mount_opt.s_qf_names[i]) {
1770                                 for (j = 0; j < i; j++)
1771                                         kvfree(org_mount_opt.s_qf_names[j]);
1772                                 return -ENOMEM;
1773                         }
1774                 } else {
1775                         org_mount_opt.s_qf_names[i] = NULL;
1776                 }
1777         }
1778 #endif
1779
1780         /* recover superblocks we couldn't write due to previous RO mount */
1781         if (!(*flags & SB_RDONLY) && is_sbi_flag_set(sbi, SBI_NEED_SB_WRITE)) {
1782                 err = f2fs_commit_super(sbi, false);
1783                 f2fs_info(sbi, "Try to recover all the superblocks, ret: %d",
1784                           err);
1785                 if (!err)
1786                         clear_sbi_flag(sbi, SBI_NEED_SB_WRITE);
1787         }
1788
1789         default_options(sbi);
1790
1791         /* parse mount options */
1792         err = parse_options(sb, data, true);
1793         if (err)
1794                 goto restore_opts;
1795         checkpoint_changed =
1796                         disable_checkpoint != test_opt(sbi, DISABLE_CHECKPOINT);
1797
1798         /*
1799          * Previous and new state of filesystem is RO,
1800          * so skip checking GC and FLUSH_MERGE conditions.
1801          */
1802         if (f2fs_readonly(sb) && (*flags & SB_RDONLY))
1803                 goto skip;
1804
1805 #ifdef CONFIG_QUOTA
1806         if (!f2fs_readonly(sb) && (*flags & SB_RDONLY)) {
1807                 err = dquot_suspend(sb, -1);
1808                 if (err < 0)
1809                         goto restore_opts;
1810         } else if (f2fs_readonly(sb) && !(*flags & SB_RDONLY)) {
1811                 /* dquot_resume needs RW */
1812                 sb->s_flags &= ~SB_RDONLY;
1813                 if (sb_any_quota_suspended(sb)) {
1814                         dquot_resume(sb, -1);
1815                 } else if (f2fs_sb_has_quota_ino(sbi)) {
1816                         err = f2fs_enable_quotas(sb);
1817                         if (err)
1818                                 goto restore_opts;
1819                 }
1820         }
1821 #endif
1822         /* disallow enable/disable extent_cache dynamically */
1823         if (no_extent_cache == !!test_opt(sbi, EXTENT_CACHE)) {
1824                 err = -EINVAL;
1825                 f2fs_warn(sbi, "switch extent_cache option is not allowed");
1826                 goto restore_opts;
1827         }
1828
1829         if (no_io_align == !!F2FS_IO_ALIGNED(sbi)) {
1830                 err = -EINVAL;
1831                 f2fs_warn(sbi, "switch io_bits option is not allowed");
1832                 goto restore_opts;
1833         }
1834
1835         if ((*flags & SB_RDONLY) && test_opt(sbi, DISABLE_CHECKPOINT)) {
1836                 err = -EINVAL;
1837                 f2fs_warn(sbi, "disabling checkpoint not compatible with read-only");
1838                 goto restore_opts;
1839         }
1840
1841         /*
1842          * We stop the GC thread if FS is mounted as RO
1843          * or if background_gc = off is passed in mount
1844          * option. Also sync the filesystem.
1845          */
1846         if ((*flags & SB_RDONLY) ||
1847                         F2FS_OPTION(sbi).bggc_mode == BGGC_MODE_OFF) {
1848                 if (sbi->gc_thread) {
1849                         f2fs_stop_gc_thread(sbi);
1850                         need_restart_gc = true;
1851                 }
1852         } else if (!sbi->gc_thread) {
1853                 err = f2fs_start_gc_thread(sbi);
1854                 if (err)
1855                         goto restore_opts;
1856                 need_stop_gc = true;
1857         }
1858
1859         if (*flags & SB_RDONLY ||
1860                 F2FS_OPTION(sbi).whint_mode != org_mount_opt.whint_mode) {
1861                 writeback_inodes_sb(sb, WB_REASON_SYNC);
1862                 sync_inodes_sb(sb);
1863
1864                 set_sbi_flag(sbi, SBI_IS_DIRTY);
1865                 set_sbi_flag(sbi, SBI_IS_CLOSE);
1866                 f2fs_sync_fs(sb, 1);
1867                 clear_sbi_flag(sbi, SBI_IS_CLOSE);
1868         }
1869
1870         if (checkpoint_changed) {
1871                 if (test_opt(sbi, DISABLE_CHECKPOINT)) {
1872                         err = f2fs_disable_checkpoint(sbi);
1873                         if (err)
1874                                 goto restore_gc;
1875                 } else {
1876                         f2fs_enable_checkpoint(sbi);
1877                 }
1878         }
1879
1880         /*
1881          * We stop issue flush thread if FS is mounted as RO
1882          * or if flush_merge is not passed in mount option.
1883          */
1884         if ((*flags & SB_RDONLY) || !test_opt(sbi, FLUSH_MERGE)) {
1885                 clear_opt(sbi, FLUSH_MERGE);
1886                 f2fs_destroy_flush_cmd_control(sbi, false);
1887         } else {
1888                 err = f2fs_create_flush_cmd_control(sbi);
1889                 if (err)
1890                         goto restore_gc;
1891         }
1892 skip:
1893 #ifdef CONFIG_QUOTA
1894         /* Release old quota file names */
1895         for (i = 0; i < MAXQUOTAS; i++)
1896                 kvfree(org_mount_opt.s_qf_names[i]);
1897 #endif
1898         /* Update the POSIXACL Flag */
1899         sb->s_flags = (sb->s_flags & ~SB_POSIXACL) |
1900                 (test_opt(sbi, POSIX_ACL) ? SB_POSIXACL : 0);
1901
1902         limit_reserve_root(sbi);
1903         adjust_unusable_cap_perc(sbi);
1904         *flags = (*flags & ~SB_LAZYTIME) | (sb->s_flags & SB_LAZYTIME);
1905         return 0;
1906 restore_gc:
1907         if (need_restart_gc) {
1908                 if (f2fs_start_gc_thread(sbi))
1909                         f2fs_warn(sbi, "background gc thread has stopped");
1910         } else if (need_stop_gc) {
1911                 f2fs_stop_gc_thread(sbi);
1912         }
1913 restore_opts:
1914 #ifdef CONFIG_QUOTA
1915         F2FS_OPTION(sbi).s_jquota_fmt = org_mount_opt.s_jquota_fmt;
1916         for (i = 0; i < MAXQUOTAS; i++) {
1917                 kvfree(F2FS_OPTION(sbi).s_qf_names[i]);
1918                 F2FS_OPTION(sbi).s_qf_names[i] = org_mount_opt.s_qf_names[i];
1919         }
1920 #endif
1921         sbi->mount_opt = org_mount_opt;
1922         sb->s_flags = old_sb_flags;
1923         return err;
1924 }
1925
1926 #ifdef CONFIG_QUOTA
1927 /* Read data from quotafile */
1928 static ssize_t f2fs_quota_read(struct super_block *sb, int type, char *data,
1929                                size_t len, loff_t off)
1930 {
1931         struct inode *inode = sb_dqopt(sb)->files[type];
1932         struct address_space *mapping = inode->i_mapping;
1933         block_t blkidx = F2FS_BYTES_TO_BLK(off);
1934         int offset = off & (sb->s_blocksize - 1);
1935         int tocopy;
1936         size_t toread;
1937         loff_t i_size = i_size_read(inode);
1938         struct page *page;
1939         char *kaddr;
1940
1941         if (off > i_size)
1942                 return 0;
1943
1944         if (off + len > i_size)
1945                 len = i_size - off;
1946         toread = len;
1947         while (toread > 0) {
1948                 tocopy = min_t(unsigned long, sb->s_blocksize - offset, toread);
1949 repeat:
1950                 page = read_cache_page_gfp(mapping, blkidx, GFP_NOFS);
1951                 if (IS_ERR(page)) {
1952                         if (PTR_ERR(page) == -ENOMEM) {
1953                                 congestion_wait(BLK_RW_ASYNC,
1954                                                 DEFAULT_IO_TIMEOUT);
1955                                 goto repeat;
1956                         }
1957                         set_sbi_flag(F2FS_SB(sb), SBI_QUOTA_NEED_REPAIR);
1958                         return PTR_ERR(page);
1959                 }
1960
1961                 lock_page(page);
1962
1963                 if (unlikely(page->mapping != mapping)) {
1964                         f2fs_put_page(page, 1);
1965                         goto repeat;
1966                 }
1967                 if (unlikely(!PageUptodate(page))) {
1968                         f2fs_put_page(page, 1);
1969                         set_sbi_flag(F2FS_SB(sb), SBI_QUOTA_NEED_REPAIR);
1970                         return -EIO;
1971                 }
1972
1973                 kaddr = kmap_atomic(page);
1974                 memcpy(data, kaddr + offset, tocopy);
1975                 kunmap_atomic(kaddr);
1976                 f2fs_put_page(page, 1);
1977
1978                 offset = 0;
1979                 toread -= tocopy;
1980                 data += tocopy;
1981                 blkidx++;
1982         }
1983         return len;
1984 }
1985
1986 /* Write to quotafile */
1987 static ssize_t f2fs_quota_write(struct super_block *sb, int type,
1988                                 const char *data, size_t len, loff_t off)
1989 {
1990         struct inode *inode = sb_dqopt(sb)->files[type];
1991         struct address_space *mapping = inode->i_mapping;
1992         const struct address_space_operations *a_ops = mapping->a_ops;
1993         int offset = off & (sb->s_blocksize - 1);
1994         size_t towrite = len;
1995         struct page *page;
1996         void *fsdata = NULL;
1997         char *kaddr;
1998         int err = 0;
1999         int tocopy;
2000
2001         while (towrite > 0) {
2002                 tocopy = min_t(unsigned long, sb->s_blocksize - offset,
2003                                                                 towrite);
2004 retry:
2005                 err = a_ops->write_begin(NULL, mapping, off, tocopy, 0,
2006                                                         &page, &fsdata);
2007                 if (unlikely(err)) {
2008                         if (err == -ENOMEM) {
2009                                 congestion_wait(BLK_RW_ASYNC,
2010                                                 DEFAULT_IO_TIMEOUT);
2011                                 goto retry;
2012                         }
2013                         set_sbi_flag(F2FS_SB(sb), SBI_QUOTA_NEED_REPAIR);
2014                         break;
2015                 }
2016
2017                 kaddr = kmap_atomic(page);
2018                 memcpy(kaddr + offset, data, tocopy);
2019                 kunmap_atomic(kaddr);
2020                 flush_dcache_page(page);
2021
2022                 a_ops->write_end(NULL, mapping, off, tocopy, tocopy,
2023                                                 page, fsdata);
2024                 offset = 0;
2025                 towrite -= tocopy;
2026                 off += tocopy;
2027                 data += tocopy;
2028                 cond_resched();
2029         }
2030
2031         if (len == towrite)
2032                 return err;
2033         inode->i_mtime = inode->i_ctime = current_time(inode);
2034         f2fs_mark_inode_dirty_sync(inode, false);
2035         return len - towrite;
2036 }
2037
2038 static struct dquot **f2fs_get_dquots(struct inode *inode)
2039 {
2040         return F2FS_I(inode)->i_dquot;
2041 }
2042
2043 static qsize_t *f2fs_get_reserved_space(struct inode *inode)
2044 {
2045         return &F2FS_I(inode)->i_reserved_quota;
2046 }
2047
2048 static int f2fs_quota_on_mount(struct f2fs_sb_info *sbi, int type)
2049 {
2050         if (is_set_ckpt_flags(sbi, CP_QUOTA_NEED_FSCK_FLAG)) {
2051                 f2fs_err(sbi, "quota sysfile may be corrupted, skip loading it");
2052                 return 0;
2053         }
2054
2055         return dquot_quota_on_mount(sbi->sb, F2FS_OPTION(sbi).s_qf_names[type],
2056                                         F2FS_OPTION(sbi).s_jquota_fmt, type);
2057 }
2058
2059 int f2fs_enable_quota_files(struct f2fs_sb_info *sbi, bool rdonly)
2060 {
2061         int enabled = 0;
2062         int i, err;
2063
2064         if (f2fs_sb_has_quota_ino(sbi) && rdonly) {
2065                 err = f2fs_enable_quotas(sbi->sb);
2066                 if (err) {
2067                         f2fs_err(sbi, "Cannot turn on quota_ino: %d", err);
2068                         return 0;
2069                 }
2070                 return 1;
2071         }
2072
2073         for (i = 0; i < MAXQUOTAS; i++) {
2074                 if (F2FS_OPTION(sbi).s_qf_names[i]) {
2075                         err = f2fs_quota_on_mount(sbi, i);
2076                         if (!err) {
2077                                 enabled = 1;
2078                                 continue;
2079                         }
2080                         f2fs_err(sbi, "Cannot turn on quotas: %d on %d",
2081                                  err, i);
2082                 }
2083         }
2084         return enabled;
2085 }
2086
2087 static int f2fs_quota_enable(struct super_block *sb, int type, int format_id,
2088                              unsigned int flags)
2089 {
2090         struct inode *qf_inode;
2091         unsigned long qf_inum;
2092         int err;
2093
2094         BUG_ON(!f2fs_sb_has_quota_ino(F2FS_SB(sb)));
2095
2096         qf_inum = f2fs_qf_ino(sb, type);
2097         if (!qf_inum)
2098                 return -EPERM;
2099
2100         qf_inode = f2fs_iget(sb, qf_inum);
2101         if (IS_ERR(qf_inode)) {
2102                 f2fs_err(F2FS_SB(sb), "Bad quota inode %u:%lu", type, qf_inum);
2103                 return PTR_ERR(qf_inode);
2104         }
2105
2106         /* Don't account quota for quota files to avoid recursion */
2107         qf_inode->i_flags |= S_NOQUOTA;
2108         err = dquot_load_quota_inode(qf_inode, type, format_id, flags);
2109         iput(qf_inode);
2110         return err;
2111 }
2112
2113 static int f2fs_enable_quotas(struct super_block *sb)
2114 {
2115         struct f2fs_sb_info *sbi = F2FS_SB(sb);
2116         int type, err = 0;
2117         unsigned long qf_inum;
2118         bool quota_mopt[MAXQUOTAS] = {
2119                 test_opt(sbi, USRQUOTA),
2120                 test_opt(sbi, GRPQUOTA),
2121                 test_opt(sbi, PRJQUOTA),
2122         };
2123
2124         if (is_set_ckpt_flags(F2FS_SB(sb), CP_QUOTA_NEED_FSCK_FLAG)) {
2125                 f2fs_err(sbi, "quota file may be corrupted, skip loading it");
2126                 return 0;
2127         }
2128
2129         sb_dqopt(sb)->flags |= DQUOT_QUOTA_SYS_FILE;
2130
2131         for (type = 0; type < MAXQUOTAS; type++) {
2132                 qf_inum = f2fs_qf_ino(sb, type);
2133                 if (qf_inum) {
2134                         err = f2fs_quota_enable(sb, type, QFMT_VFS_V1,
2135                                 DQUOT_USAGE_ENABLED |
2136                                 (quota_mopt[type] ? DQUOT_LIMITS_ENABLED : 0));
2137                         if (err) {
2138                                 f2fs_err(sbi, "Failed to enable quota tracking (type=%d, err=%d). Please run fsck to fix.",
2139                                          type, err);
2140                                 for (type--; type >= 0; type--)
2141                                         dquot_quota_off(sb, type);
2142                                 set_sbi_flag(F2FS_SB(sb),
2143                                                 SBI_QUOTA_NEED_REPAIR);
2144                                 return err;
2145                         }
2146                 }
2147         }
2148         return 0;
2149 }
2150
2151 int f2fs_quota_sync(struct super_block *sb, int type)
2152 {
2153         struct f2fs_sb_info *sbi = F2FS_SB(sb);
2154         struct quota_info *dqopt = sb_dqopt(sb);
2155         int cnt;
2156         int ret;
2157
2158         /*
2159          * do_quotactl
2160          *  f2fs_quota_sync
2161          *  down_read(quota_sem)
2162          *  dquot_writeback_dquots()
2163          *  f2fs_dquot_commit
2164          *                            block_operation
2165          *                            down_read(quota_sem)
2166          */
2167         f2fs_lock_op(sbi);
2168
2169         down_read(&sbi->quota_sem);
2170         ret = dquot_writeback_dquots(sb, type);
2171         if (ret)
2172                 goto out;
2173
2174         /*
2175          * Now when everything is written we can discard the pagecache so
2176          * that userspace sees the changes.
2177          */
2178         for (cnt = 0; cnt < MAXQUOTAS; cnt++) {
2179                 struct address_space *mapping;
2180
2181                 if (type != -1 && cnt != type)
2182                         continue;
2183                 if (!sb_has_quota_active(sb, cnt))
2184                         continue;
2185
2186                 mapping = dqopt->files[cnt]->i_mapping;
2187
2188                 ret = filemap_fdatawrite(mapping);
2189                 if (ret)
2190                         goto out;
2191
2192                 /* if we are using journalled quota */
2193                 if (is_journalled_quota(sbi))
2194                         continue;
2195
2196                 ret = filemap_fdatawait(mapping);
2197                 if (ret)
2198                         set_sbi_flag(F2FS_SB(sb), SBI_QUOTA_NEED_REPAIR);
2199
2200                 inode_lock(dqopt->files[cnt]);
2201                 truncate_inode_pages(&dqopt->files[cnt]->i_data, 0);
2202                 inode_unlock(dqopt->files[cnt]);
2203         }
2204 out:
2205         if (ret)
2206                 set_sbi_flag(F2FS_SB(sb), SBI_QUOTA_NEED_REPAIR);
2207         up_read(&sbi->quota_sem);
2208         f2fs_unlock_op(sbi);
2209         return ret;
2210 }
2211
2212 static int f2fs_quota_on(struct super_block *sb, int type, int format_id,
2213                                                         const struct path *path)
2214 {
2215         struct inode *inode;
2216         int err;
2217
2218         /* if quota sysfile exists, deny enabling quota with specific file */
2219         if (f2fs_sb_has_quota_ino(F2FS_SB(sb))) {
2220                 f2fs_err(F2FS_SB(sb), "quota sysfile already exists");
2221                 return -EBUSY;
2222         }
2223
2224         err = f2fs_quota_sync(sb, type);
2225         if (err)
2226                 return err;
2227
2228         err = dquot_quota_on(sb, type, format_id, path);
2229         if (err)
2230                 return err;
2231
2232         inode = d_inode(path->dentry);
2233
2234         inode_lock(inode);
2235         F2FS_I(inode)->i_flags |= F2FS_NOATIME_FL | F2FS_IMMUTABLE_FL;
2236         f2fs_set_inode_flags(inode);
2237         inode_unlock(inode);
2238         f2fs_mark_inode_dirty_sync(inode, false);
2239
2240         return 0;
2241 }
2242
2243 static int __f2fs_quota_off(struct super_block *sb, int type)
2244 {
2245         struct inode *inode = sb_dqopt(sb)->files[type];
2246         int err;
2247
2248         if (!inode || !igrab(inode))
2249                 return dquot_quota_off(sb, type);
2250
2251         err = f2fs_quota_sync(sb, type);
2252         if (err)
2253                 goto out_put;
2254
2255         err = dquot_quota_off(sb, type);
2256         if (err || f2fs_sb_has_quota_ino(F2FS_SB(sb)))
2257                 goto out_put;
2258
2259         inode_lock(inode);
2260         F2FS_I(inode)->i_flags &= ~(F2FS_NOATIME_FL | F2FS_IMMUTABLE_FL);
2261         f2fs_set_inode_flags(inode);
2262         inode_unlock(inode);
2263         f2fs_mark_inode_dirty_sync(inode, false);
2264 out_put:
2265         iput(inode);
2266         return err;
2267 }
2268
2269 static int f2fs_quota_off(struct super_block *sb, int type)
2270 {
2271         struct f2fs_sb_info *sbi = F2FS_SB(sb);
2272         int err;
2273
2274         err = __f2fs_quota_off(sb, type);
2275
2276         /*
2277          * quotactl can shutdown journalled quota, result in inconsistence
2278          * between quota record and fs data by following updates, tag the
2279          * flag to let fsck be aware of it.
2280          */
2281         if (is_journalled_quota(sbi))
2282                 set_sbi_flag(sbi, SBI_QUOTA_NEED_REPAIR);
2283         return err;
2284 }
2285
2286 void f2fs_quota_off_umount(struct super_block *sb)
2287 {
2288         int type;
2289         int err;
2290
2291         for (type = 0; type < MAXQUOTAS; type++) {
2292                 err = __f2fs_quota_off(sb, type);
2293                 if (err) {
2294                         int ret = dquot_quota_off(sb, type);
2295
2296                         f2fs_err(F2FS_SB(sb), "Fail to turn off disk quota (type: %d, err: %d, ret:%d), Please run fsck to fix it.",
2297                                  type, err, ret);
2298                         set_sbi_flag(F2FS_SB(sb), SBI_QUOTA_NEED_REPAIR);
2299                 }
2300         }
2301         /*
2302          * In case of checkpoint=disable, we must flush quota blocks.
2303          * This can cause NULL exception for node_inode in end_io, since
2304          * put_super already dropped it.
2305          */
2306         sync_filesystem(sb);
2307 }
2308
2309 static void f2fs_truncate_quota_inode_pages(struct super_block *sb)
2310 {
2311         struct quota_info *dqopt = sb_dqopt(sb);
2312         int type;
2313
2314         for (type = 0; type < MAXQUOTAS; type++) {
2315                 if (!dqopt->files[type])
2316                         continue;
2317                 f2fs_inode_synced(dqopt->files[type]);
2318         }
2319 }
2320
2321 static int f2fs_dquot_commit(struct dquot *dquot)
2322 {
2323         struct f2fs_sb_info *sbi = F2FS_SB(dquot->dq_sb);
2324         int ret;
2325
2326         down_read_nested(&sbi->quota_sem, SINGLE_DEPTH_NESTING);
2327         ret = dquot_commit(dquot);
2328         if (ret < 0)
2329                 set_sbi_flag(sbi, SBI_QUOTA_NEED_REPAIR);
2330         up_read(&sbi->quota_sem);
2331         return ret;
2332 }
2333
2334 static int f2fs_dquot_acquire(struct dquot *dquot)
2335 {
2336         struct f2fs_sb_info *sbi = F2FS_SB(dquot->dq_sb);
2337         int ret;
2338
2339         down_read(&sbi->quota_sem);
2340         ret = dquot_acquire(dquot);
2341         if (ret < 0)
2342                 set_sbi_flag(sbi, SBI_QUOTA_NEED_REPAIR);
2343         up_read(&sbi->quota_sem);
2344         return ret;
2345 }
2346
2347 static int f2fs_dquot_release(struct dquot *dquot)
2348 {
2349         struct f2fs_sb_info *sbi = F2FS_SB(dquot->dq_sb);
2350         int ret = dquot_release(dquot);
2351
2352         if (ret < 0)
2353                 set_sbi_flag(sbi, SBI_QUOTA_NEED_REPAIR);
2354         return ret;
2355 }
2356
2357 static int f2fs_dquot_mark_dquot_dirty(struct dquot *dquot)
2358 {
2359         struct super_block *sb = dquot->dq_sb;
2360         struct f2fs_sb_info *sbi = F2FS_SB(sb);
2361         int ret = dquot_mark_dquot_dirty(dquot);
2362
2363         /* if we are using journalled quota */
2364         if (is_journalled_quota(sbi))
2365                 set_sbi_flag(sbi, SBI_QUOTA_NEED_FLUSH);
2366
2367         return ret;
2368 }
2369
2370 static int f2fs_dquot_commit_info(struct super_block *sb, int type)
2371 {
2372         struct f2fs_sb_info *sbi = F2FS_SB(sb);
2373         int ret = dquot_commit_info(sb, type);
2374
2375         if (ret < 0)
2376                 set_sbi_flag(sbi, SBI_QUOTA_NEED_REPAIR);
2377         return ret;
2378 }
2379
2380 static int f2fs_get_projid(struct inode *inode, kprojid_t *projid)
2381 {
2382         *projid = F2FS_I(inode)->i_projid;
2383         return 0;
2384 }
2385
2386 static const struct dquot_operations f2fs_quota_operations = {
2387         .get_reserved_space = f2fs_get_reserved_space,
2388         .write_dquot    = f2fs_dquot_commit,
2389         .acquire_dquot  = f2fs_dquot_acquire,
2390         .release_dquot  = f2fs_dquot_release,
2391         .mark_dirty     = f2fs_dquot_mark_dquot_dirty,
2392         .write_info     = f2fs_dquot_commit_info,
2393         .alloc_dquot    = dquot_alloc,
2394         .destroy_dquot  = dquot_destroy,
2395         .get_projid     = f2fs_get_projid,
2396         .get_next_id    = dquot_get_next_id,
2397 };
2398
2399 static const struct quotactl_ops f2fs_quotactl_ops = {
2400         .quota_on       = f2fs_quota_on,
2401         .quota_off      = f2fs_quota_off,
2402         .quota_sync     = f2fs_quota_sync,
2403         .get_state      = dquot_get_state,
2404         .set_info       = dquot_set_dqinfo,
2405         .get_dqblk      = dquot_get_dqblk,
2406         .set_dqblk      = dquot_set_dqblk,
2407         .get_nextdqblk  = dquot_get_next_dqblk,
2408 };
2409 #else
2410 int f2fs_quota_sync(struct super_block *sb, int type)
2411 {
2412         return 0;
2413 }
2414
2415 void f2fs_quota_off_umount(struct super_block *sb)
2416 {
2417 }
2418 #endif
2419
2420 static const struct super_operations f2fs_sops = {
2421         .alloc_inode    = f2fs_alloc_inode,
2422         .free_inode     = f2fs_free_inode,
2423         .drop_inode     = f2fs_drop_inode,
2424         .write_inode    = f2fs_write_inode,
2425         .dirty_inode    = f2fs_dirty_inode,
2426         .show_options   = f2fs_show_options,
2427 #ifdef CONFIG_QUOTA
2428         .quota_read     = f2fs_quota_read,
2429         .quota_write    = f2fs_quota_write,
2430         .get_dquots     = f2fs_get_dquots,
2431 #endif
2432         .evict_inode    = f2fs_evict_inode,
2433         .put_super      = f2fs_put_super,
2434         .sync_fs        = f2fs_sync_fs,
2435         .freeze_fs      = f2fs_freeze,
2436         .unfreeze_fs    = f2fs_unfreeze,
2437         .statfs         = f2fs_statfs,
2438         .remount_fs     = f2fs_remount,
2439 };
2440
2441 #ifdef CONFIG_FS_ENCRYPTION
2442 static int f2fs_get_context(struct inode *inode, void *ctx, size_t len)
2443 {
2444         return f2fs_getxattr(inode, F2FS_XATTR_INDEX_ENCRYPTION,
2445                                 F2FS_XATTR_NAME_ENCRYPTION_CONTEXT,
2446                                 ctx, len, NULL);
2447 }
2448
2449 static int f2fs_set_context(struct inode *inode, const void *ctx, size_t len,
2450                                                         void *fs_data)
2451 {
2452         struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
2453
2454         /*
2455          * Encrypting the root directory is not allowed because fsck
2456          * expects lost+found directory to exist and remain unencrypted
2457          * if LOST_FOUND feature is enabled.
2458          *
2459          */
2460         if (f2fs_sb_has_lost_found(sbi) &&
2461                         inode->i_ino == F2FS_ROOT_INO(sbi))
2462                 return -EPERM;
2463
2464         return f2fs_setxattr(inode, F2FS_XATTR_INDEX_ENCRYPTION,
2465                                 F2FS_XATTR_NAME_ENCRYPTION_CONTEXT,
2466                                 ctx, len, fs_data, XATTR_CREATE);
2467 }
2468
2469 static const union fscrypt_context *
2470 f2fs_get_dummy_context(struct super_block *sb)
2471 {
2472         return F2FS_OPTION(F2FS_SB(sb)).dummy_enc_ctx.ctx;
2473 }
2474
2475 static bool f2fs_has_stable_inodes(struct super_block *sb)
2476 {
2477         return true;
2478 }
2479
2480 static void f2fs_get_ino_and_lblk_bits(struct super_block *sb,
2481                                        int *ino_bits_ret, int *lblk_bits_ret)
2482 {
2483         *ino_bits_ret = 8 * sizeof(nid_t);
2484         *lblk_bits_ret = 8 * sizeof(block_t);
2485 }
2486
2487 static int f2fs_get_num_devices(struct super_block *sb)
2488 {
2489         struct f2fs_sb_info *sbi = F2FS_SB(sb);
2490
2491         if (f2fs_is_multi_device(sbi))
2492                 return sbi->s_ndevs;
2493         return 1;
2494 }
2495
2496 static void f2fs_get_devices(struct super_block *sb,
2497                              struct request_queue **devs)
2498 {
2499         struct f2fs_sb_info *sbi = F2FS_SB(sb);
2500         int i;
2501
2502         for (i = 0; i < sbi->s_ndevs; i++)
2503                 devs[i] = bdev_get_queue(FDEV(i).bdev);
2504 }
2505
2506 static const struct fscrypt_operations f2fs_cryptops = {
2507         .key_prefix             = "f2fs:",
2508         .get_context            = f2fs_get_context,
2509         .set_context            = f2fs_set_context,
2510         .get_dummy_context      = f2fs_get_dummy_context,
2511         .empty_dir              = f2fs_empty_dir,
2512         .max_namelen            = F2FS_NAME_LEN,
2513         .has_stable_inodes      = f2fs_has_stable_inodes,
2514         .get_ino_and_lblk_bits  = f2fs_get_ino_and_lblk_bits,
2515         .get_num_devices        = f2fs_get_num_devices,
2516         .get_devices            = f2fs_get_devices,
2517 };
2518 #endif
2519
2520 static struct inode *f2fs_nfs_get_inode(struct super_block *sb,
2521                 u64 ino, u32 generation)
2522 {
2523         struct f2fs_sb_info *sbi = F2FS_SB(sb);
2524         struct inode *inode;
2525
2526         if (f2fs_check_nid_range(sbi, ino))
2527                 return ERR_PTR(-ESTALE);
2528
2529         /*
2530          * f2fs_iget isn't quite right if the inode is currently unallocated!
2531          * However f2fs_iget currently does appropriate checks to handle stale
2532          * inodes so everything is OK.
2533          */
2534         inode = f2fs_iget(sb, ino);
2535         if (IS_ERR(inode))
2536                 return ERR_CAST(inode);
2537         if (unlikely(generation && inode->i_generation != generation)) {
2538                 /* we didn't find the right inode.. */
2539                 iput(inode);
2540                 return ERR_PTR(-ESTALE);
2541         }
2542         return inode;
2543 }
2544
2545 static struct dentry *f2fs_fh_to_dentry(struct super_block *sb, struct fid *fid,
2546                 int fh_len, int fh_type)
2547 {
2548         return generic_fh_to_dentry(sb, fid, fh_len, fh_type,
2549                                     f2fs_nfs_get_inode);
2550 }
2551
2552 static struct dentry *f2fs_fh_to_parent(struct super_block *sb, struct fid *fid,
2553                 int fh_len, int fh_type)
2554 {
2555         return generic_fh_to_parent(sb, fid, fh_len, fh_type,
2556                                     f2fs_nfs_get_inode);
2557 }
2558
2559 static const struct export_operations f2fs_export_ops = {
2560         .fh_to_dentry = f2fs_fh_to_dentry,
2561         .fh_to_parent = f2fs_fh_to_parent,
2562         .get_parent = f2fs_get_parent,
2563 };
2564
2565 static loff_t max_file_blocks(void)
2566 {
2567         loff_t result = 0;
2568         loff_t leaf_count = DEF_ADDRS_PER_BLOCK;
2569
2570         /*
2571          * note: previously, result is equal to (DEF_ADDRS_PER_INODE -
2572          * DEFAULT_INLINE_XATTR_ADDRS), but now f2fs try to reserve more
2573          * space in inode.i_addr, it will be more safe to reassign
2574          * result as zero.
2575          */
2576
2577         /* two direct node blocks */
2578         result += (leaf_count * 2);
2579
2580         /* two indirect node blocks */
2581         leaf_count *= NIDS_PER_BLOCK;
2582         result += (leaf_count * 2);
2583
2584         /* one double indirect node block */
2585         leaf_count *= NIDS_PER_BLOCK;
2586         result += leaf_count;
2587
2588         return result;
2589 }
2590
2591 static int __f2fs_commit_super(struct buffer_head *bh,
2592                         struct f2fs_super_block *super)
2593 {
2594         lock_buffer(bh);
2595         if (super)
2596                 memcpy(bh->b_data + F2FS_SUPER_OFFSET, super, sizeof(*super));
2597         set_buffer_dirty(bh);
2598         unlock_buffer(bh);
2599
2600         /* it's rare case, we can do fua all the time */
2601         return __sync_dirty_buffer(bh, REQ_SYNC | REQ_PREFLUSH | REQ_FUA);
2602 }
2603
2604 static inline bool sanity_check_area_boundary(struct f2fs_sb_info *sbi,
2605                                         struct buffer_head *bh)
2606 {
2607         struct f2fs_super_block *raw_super = (struct f2fs_super_block *)
2608                                         (bh->b_data + F2FS_SUPER_OFFSET);
2609         struct super_block *sb = sbi->sb;
2610         u32 segment0_blkaddr = le32_to_cpu(raw_super->segment0_blkaddr);
2611         u32 cp_blkaddr = le32_to_cpu(raw_super->cp_blkaddr);
2612         u32 sit_blkaddr = le32_to_cpu(raw_super->sit_blkaddr);
2613         u32 nat_blkaddr = le32_to_cpu(raw_super->nat_blkaddr);
2614         u32 ssa_blkaddr = le32_to_cpu(raw_super->ssa_blkaddr);
2615         u32 main_blkaddr = le32_to_cpu(raw_super->main_blkaddr);
2616         u32 segment_count_ckpt = le32_to_cpu(raw_super->segment_count_ckpt);
2617         u32 segment_count_sit = le32_to_cpu(raw_super->segment_count_sit);
2618         u32 segment_count_nat = le32_to_cpu(raw_super->segment_count_nat);
2619         u32 segment_count_ssa = le32_to_cpu(raw_super->segment_count_ssa);
2620         u32 segment_count_main = le32_to_cpu(raw_super->segment_count_main);
2621         u32 segment_count = le32_to_cpu(raw_super->segment_count);
2622         u32 log_blocks_per_seg = le32_to_cpu(raw_super->log_blocks_per_seg);
2623         u64 main_end_blkaddr = main_blkaddr +
2624                                 (segment_count_main << log_blocks_per_seg);
2625         u64 seg_end_blkaddr = segment0_blkaddr +
2626                                 (segment_count << log_blocks_per_seg);
2627
2628         if (segment0_blkaddr != cp_blkaddr) {
2629                 f2fs_info(sbi, "Mismatch start address, segment0(%u) cp_blkaddr(%u)",
2630                           segment0_blkaddr, cp_blkaddr);
2631                 return true;
2632         }
2633
2634         if (cp_blkaddr + (segment_count_ckpt << log_blocks_per_seg) !=
2635                                                         sit_blkaddr) {
2636                 f2fs_info(sbi, "Wrong CP boundary, start(%u) end(%u) blocks(%u)",
2637                           cp_blkaddr, sit_blkaddr,
2638                           segment_count_ckpt << log_blocks_per_seg);
2639                 return true;
2640         }
2641
2642         if (sit_blkaddr + (segment_count_sit << log_blocks_per_seg) !=
2643                                                         nat_blkaddr) {
2644                 f2fs_info(sbi, "Wrong SIT boundary, start(%u) end(%u) blocks(%u)",
2645                           sit_blkaddr, nat_blkaddr,
2646                           segment_count_sit << log_blocks_per_seg);
2647                 return true;
2648         }
2649
2650         if (nat_blkaddr + (segment_count_nat << log_blocks_per_seg) !=
2651                                                         ssa_blkaddr) {
2652                 f2fs_info(sbi, "Wrong NAT boundary, start(%u) end(%u) blocks(%u)",
2653                           nat_blkaddr, ssa_blkaddr,
2654                           segment_count_nat << log_blocks_per_seg);
2655                 return true;
2656         }
2657
2658         if (ssa_blkaddr + (segment_count_ssa << log_blocks_per_seg) !=
2659                                                         main_blkaddr) {
2660                 f2fs_info(sbi, "Wrong SSA boundary, start(%u) end(%u) blocks(%u)",
2661                           ssa_blkaddr, main_blkaddr,
2662                           segment_count_ssa << log_blocks_per_seg);
2663                 return true;
2664         }
2665
2666         if (main_end_blkaddr > seg_end_blkaddr) {
2667                 f2fs_info(sbi, "Wrong MAIN_AREA boundary, start(%u) end(%u) block(%u)",
2668                           main_blkaddr,
2669                           segment0_blkaddr +
2670                           (segment_count << log_blocks_per_seg),
2671                           segment_count_main << log_blocks_per_seg);
2672                 return true;
2673         } else if (main_end_blkaddr < seg_end_blkaddr) {
2674                 int err = 0;
2675                 char *res;
2676
2677                 /* fix in-memory information all the time */
2678                 raw_super->segment_count = cpu_to_le32((main_end_blkaddr -
2679                                 segment0_blkaddr) >> log_blocks_per_seg);
2680
2681                 if (f2fs_readonly(sb) || bdev_read_only(sb->s_bdev)) {
2682                         set_sbi_flag(sbi, SBI_NEED_SB_WRITE);
2683                         res = "internally";
2684                 } else {
2685                         err = __f2fs_commit_super(bh, NULL);
2686                         res = err ? "failed" : "done";
2687                 }
2688                 f2fs_info(sbi, "Fix alignment : %s, start(%u) end(%u) block(%u)",
2689                           res, main_blkaddr,
2690                           segment0_blkaddr +
2691                           (segment_count << log_blocks_per_seg),
2692                           segment_count_main << log_blocks_per_seg);
2693                 if (err)
2694                         return true;
2695         }
2696         return false;
2697 }
2698
2699 static int sanity_check_raw_super(struct f2fs_sb_info *sbi,
2700                                 struct buffer_head *bh)
2701 {
2702         block_t segment_count, segs_per_sec, secs_per_zone;
2703         block_t total_sections, blocks_per_seg;
2704         struct f2fs_super_block *raw_super = (struct f2fs_super_block *)
2705                                         (bh->b_data + F2FS_SUPER_OFFSET);
2706         unsigned int blocksize;
2707         size_t crc_offset = 0;
2708         __u32 crc = 0;
2709
2710         if (le32_to_cpu(raw_super->magic) != F2FS_SUPER_MAGIC) {
2711                 f2fs_info(sbi, "Magic Mismatch, valid(0x%x) - read(0x%x)",
2712                           F2FS_SUPER_MAGIC, le32_to_cpu(raw_super->magic));
2713                 return -EINVAL;
2714         }
2715
2716         /* Check checksum_offset and crc in superblock */
2717         if (__F2FS_HAS_FEATURE(raw_super, F2FS_FEATURE_SB_CHKSUM)) {
2718                 crc_offset = le32_to_cpu(raw_super->checksum_offset);
2719                 if (crc_offset !=
2720                         offsetof(struct f2fs_super_block, crc)) {
2721                         f2fs_info(sbi, "Invalid SB checksum offset: %zu",
2722                                   crc_offset);
2723                         return -EFSCORRUPTED;
2724                 }
2725                 crc = le32_to_cpu(raw_super->crc);
2726                 if (!f2fs_crc_valid(sbi, crc, raw_super, crc_offset)) {
2727                         f2fs_info(sbi, "Invalid SB checksum value: %u", crc);
2728                         return -EFSCORRUPTED;
2729                 }
2730         }
2731
2732         /* Currently, support only 4KB page cache size */
2733         if (F2FS_BLKSIZE != PAGE_SIZE) {
2734                 f2fs_info(sbi, "Invalid page_cache_size (%lu), supports only 4KB",
2735                           PAGE_SIZE);
2736                 return -EFSCORRUPTED;
2737         }
2738
2739         /* Currently, support only 4KB block size */
2740         blocksize = 1 << le32_to_cpu(raw_super->log_blocksize);
2741         if (blocksize != F2FS_BLKSIZE) {
2742                 f2fs_info(sbi, "Invalid blocksize (%u), supports only 4KB",
2743                           blocksize);
2744                 return -EFSCORRUPTED;
2745         }
2746
2747         /* check log blocks per segment */
2748         if (le32_to_cpu(raw_super->log_blocks_per_seg) != 9) {
2749                 f2fs_info(sbi, "Invalid log blocks per segment (%u)",
2750                           le32_to_cpu(raw_super->log_blocks_per_seg));
2751                 return -EFSCORRUPTED;
2752         }
2753
2754         /* Currently, support 512/1024/2048/4096 bytes sector size */
2755         if (le32_to_cpu(raw_super->log_sectorsize) >
2756                                 F2FS_MAX_LOG_SECTOR_SIZE ||
2757                 le32_to_cpu(raw_super->log_sectorsize) <
2758                                 F2FS_MIN_LOG_SECTOR_SIZE) {
2759                 f2fs_info(sbi, "Invalid log sectorsize (%u)",
2760                           le32_to_cpu(raw_super->log_sectorsize));
2761                 return -EFSCORRUPTED;
2762         }
2763         if (le32_to_cpu(raw_super->log_sectors_per_block) +
2764                 le32_to_cpu(raw_super->log_sectorsize) !=
2765                         F2FS_MAX_LOG_SECTOR_SIZE) {
2766                 f2fs_info(sbi, "Invalid log sectors per block(%u) log sectorsize(%u)",
2767                           le32_to_cpu(raw_super->log_sectors_per_block),
2768                           le32_to_cpu(raw_super->log_sectorsize));
2769                 return -EFSCORRUPTED;
2770         }
2771
2772         segment_count = le32_to_cpu(raw_super->segment_count);
2773         segs_per_sec = le32_to_cpu(raw_super->segs_per_sec);
2774         secs_per_zone = le32_to_cpu(raw_super->secs_per_zone);
2775         total_sections = le32_to_cpu(raw_super->section_count);
2776
2777         /* blocks_per_seg should be 512, given the above check */
2778         blocks_per_seg = 1 << le32_to_cpu(raw_super->log_blocks_per_seg);
2779
2780         if (segment_count > F2FS_MAX_SEGMENT ||
2781                                 segment_count < F2FS_MIN_SEGMENTS) {
2782                 f2fs_info(sbi, "Invalid segment count (%u)", segment_count);
2783                 return -EFSCORRUPTED;
2784         }
2785
2786         if (total_sections > segment_count ||
2787                         total_sections < F2FS_MIN_SEGMENTS ||
2788                         segs_per_sec > segment_count || !segs_per_sec) {
2789                 f2fs_info(sbi, "Invalid segment/section count (%u, %u x %u)",
2790                           segment_count, total_sections, segs_per_sec);
2791                 return -EFSCORRUPTED;
2792         }
2793
2794         if ((segment_count / segs_per_sec) < total_sections) {
2795                 f2fs_info(sbi, "Small segment_count (%u < %u * %u)",
2796                           segment_count, segs_per_sec, total_sections);
2797                 return -EFSCORRUPTED;
2798         }
2799
2800         if (segment_count > (le64_to_cpu(raw_super->block_count) >> 9)) {
2801                 f2fs_info(sbi, "Wrong segment_count / block_count (%u > %llu)",
2802                           segment_count, le64_to_cpu(raw_super->block_count));
2803                 return -EFSCORRUPTED;
2804         }
2805
2806         if (RDEV(0).path[0]) {
2807                 block_t dev_seg_count = le32_to_cpu(RDEV(0).total_segments);
2808                 int i = 1;
2809
2810                 while (i < MAX_DEVICES && RDEV(i).path[0]) {
2811                         dev_seg_count += le32_to_cpu(RDEV(i).total_segments);
2812                         i++;
2813                 }
2814                 if (segment_count != dev_seg_count) {
2815                         f2fs_info(sbi, "Segment count (%u) mismatch with total segments from devices (%u)",
2816                                         segment_count, dev_seg_count);
2817                         return -EFSCORRUPTED;
2818                 }
2819         }
2820
2821         if (secs_per_zone > total_sections || !secs_per_zone) {
2822                 f2fs_info(sbi, "Wrong secs_per_zone / total_sections (%u, %u)",
2823                           secs_per_zone, total_sections);
2824                 return -EFSCORRUPTED;
2825         }
2826         if (le32_to_cpu(raw_super->extension_count) > F2FS_MAX_EXTENSION ||
2827                         raw_super->hot_ext_count > F2FS_MAX_EXTENSION ||
2828                         (le32_to_cpu(raw_super->extension_count) +
2829                         raw_super->hot_ext_count) > F2FS_MAX_EXTENSION) {
2830                 f2fs_info(sbi, "Corrupted extension count (%u + %u > %u)",
2831                           le32_to_cpu(raw_super->extension_count),
2832                           raw_super->hot_ext_count,
2833                           F2FS_MAX_EXTENSION);
2834                 return -EFSCORRUPTED;
2835         }
2836
2837         if (le32_to_cpu(raw_super->cp_payload) >
2838                                 (blocks_per_seg - F2FS_CP_PACKS)) {
2839                 f2fs_info(sbi, "Insane cp_payload (%u > %u)",
2840                           le32_to_cpu(raw_super->cp_payload),
2841                           blocks_per_seg - F2FS_CP_PACKS);
2842                 return -EFSCORRUPTED;
2843         }
2844
2845         /* check reserved ino info */
2846         if (le32_to_cpu(raw_super->node_ino) != 1 ||
2847                 le32_to_cpu(raw_super->meta_ino) != 2 ||
2848                 le32_to_cpu(raw_super->root_ino) != 3) {
2849                 f2fs_info(sbi, "Invalid Fs Meta Ino: node(%u) meta(%u) root(%u)",
2850                           le32_to_cpu(raw_super->node_ino),
2851                           le32_to_cpu(raw_super->meta_ino),
2852                           le32_to_cpu(raw_super->root_ino));
2853                 return -EFSCORRUPTED;
2854         }
2855
2856         /* check CP/SIT/NAT/SSA/MAIN_AREA area boundary */
2857         if (sanity_check_area_boundary(sbi, bh))
2858                 return -EFSCORRUPTED;
2859
2860         return 0;
2861 }
2862
2863 int f2fs_sanity_check_ckpt(struct f2fs_sb_info *sbi)
2864 {
2865         unsigned int total, fsmeta;
2866         struct f2fs_super_block *raw_super = F2FS_RAW_SUPER(sbi);
2867         struct f2fs_checkpoint *ckpt = F2FS_CKPT(sbi);
2868         unsigned int ovp_segments, reserved_segments;
2869         unsigned int main_segs, blocks_per_seg;
2870         unsigned int sit_segs, nat_segs;
2871         unsigned int sit_bitmap_size, nat_bitmap_size;
2872         unsigned int log_blocks_per_seg;
2873         unsigned int segment_count_main;
2874         unsigned int cp_pack_start_sum, cp_payload;
2875         block_t user_block_count, valid_user_blocks;
2876         block_t avail_node_count, valid_node_count;
2877         int i, j;
2878
2879         total = le32_to_cpu(raw_super->segment_count);
2880         fsmeta = le32_to_cpu(raw_super->segment_count_ckpt);
2881         sit_segs = le32_to_cpu(raw_super->segment_count_sit);
2882         fsmeta += sit_segs;
2883         nat_segs = le32_to_cpu(raw_super->segment_count_nat);
2884         fsmeta += nat_segs;
2885         fsmeta += le32_to_cpu(ckpt->rsvd_segment_count);
2886         fsmeta += le32_to_cpu(raw_super->segment_count_ssa);
2887
2888         if (unlikely(fsmeta >= total))
2889                 return 1;
2890
2891         ovp_segments = le32_to_cpu(ckpt->overprov_segment_count);
2892         reserved_segments = le32_to_cpu(ckpt->rsvd_segment_count);
2893
2894         if (unlikely(fsmeta < F2FS_MIN_SEGMENTS ||
2895                         ovp_segments == 0 || reserved_segments == 0)) {
2896                 f2fs_err(sbi, "Wrong layout: check mkfs.f2fs version");
2897                 return 1;
2898         }
2899
2900         user_block_count = le64_to_cpu(ckpt->user_block_count);
2901         segment_count_main = le32_to_cpu(raw_super->segment_count_main);
2902         log_blocks_per_seg = le32_to_cpu(raw_super->log_blocks_per_seg);
2903         if (!user_block_count || user_block_count >=
2904                         segment_count_main << log_blocks_per_seg) {
2905                 f2fs_err(sbi, "Wrong user_block_count: %u",
2906                          user_block_count);
2907                 return 1;
2908         }
2909
2910         valid_user_blocks = le64_to_cpu(ckpt->valid_block_count);
2911         if (valid_user_blocks > user_block_count) {
2912                 f2fs_err(sbi, "Wrong valid_user_blocks: %u, user_block_count: %u",
2913                          valid_user_blocks, user_block_count);
2914                 return 1;
2915         }
2916
2917         valid_node_count = le32_to_cpu(ckpt->valid_node_count);
2918         avail_node_count = sbi->total_node_count - F2FS_RESERVED_NODE_NUM;
2919         if (valid_node_count > avail_node_count) {
2920                 f2fs_err(sbi, "Wrong valid_node_count: %u, avail_node_count: %u",
2921                          valid_node_count, avail_node_count);
2922                 return 1;
2923         }
2924
2925         main_segs = le32_to_cpu(raw_super->segment_count_main);
2926         blocks_per_seg = sbi->blocks_per_seg;
2927
2928         for (i = 0; i < NR_CURSEG_NODE_TYPE; i++) {
2929                 if (le32_to_cpu(ckpt->cur_node_segno[i]) >= main_segs ||
2930                         le16_to_cpu(ckpt->cur_node_blkoff[i]) >= blocks_per_seg)
2931                         return 1;
2932                 for (j = i + 1; j < NR_CURSEG_NODE_TYPE; j++) {
2933                         if (le32_to_cpu(ckpt->cur_node_segno[i]) ==
2934                                 le32_to_cpu(ckpt->cur_node_segno[j])) {
2935                                 f2fs_err(sbi, "Node segment (%u, %u) has the same segno: %u",
2936                                          i, j,
2937                                          le32_to_cpu(ckpt->cur_node_segno[i]));
2938                                 return 1;
2939                         }
2940                 }
2941         }
2942         for (i = 0; i < NR_CURSEG_DATA_TYPE; i++) {
2943                 if (le32_to_cpu(ckpt->cur_data_segno[i]) >= main_segs ||
2944                         le16_to_cpu(ckpt->cur_data_blkoff[i]) >= blocks_per_seg)
2945                         return 1;
2946                 for (j = i + 1; j < NR_CURSEG_DATA_TYPE; j++) {
2947                         if (le32_to_cpu(ckpt->cur_data_segno[i]) ==
2948                                 le32_to_cpu(ckpt->cur_data_segno[j])) {
2949                                 f2fs_err(sbi, "Data segment (%u, %u) has the same segno: %u",
2950                                          i, j,
2951                                          le32_to_cpu(ckpt->cur_data_segno[i]));
2952                                 return 1;
2953                         }
2954                 }
2955         }
2956         for (i = 0; i < NR_CURSEG_NODE_TYPE; i++) {
2957                 for (j = 0; j < NR_CURSEG_DATA_TYPE; j++) {
2958                         if (le32_to_cpu(ckpt->cur_node_segno[i]) ==
2959                                 le32_to_cpu(ckpt->cur_data_segno[j])) {
2960                                 f2fs_err(sbi, "Node segment (%u) and Data segment (%u) has the same segno: %u",
2961                                          i, j,
2962                                          le32_to_cpu(ckpt->cur_node_segno[i]));
2963                                 return 1;
2964                         }
2965                 }
2966         }
2967
2968         sit_bitmap_size = le32_to_cpu(ckpt->sit_ver_bitmap_bytesize);
2969         nat_bitmap_size = le32_to_cpu(ckpt->nat_ver_bitmap_bytesize);
2970
2971         if (sit_bitmap_size != ((sit_segs / 2) << log_blocks_per_seg) / 8 ||
2972                 nat_bitmap_size != ((nat_segs / 2) << log_blocks_per_seg) / 8) {
2973                 f2fs_err(sbi, "Wrong bitmap size: sit: %u, nat:%u",
2974                          sit_bitmap_size, nat_bitmap_size);
2975                 return 1;
2976         }
2977
2978         cp_pack_start_sum = __start_sum_addr(sbi);
2979         cp_payload = __cp_payload(sbi);
2980         if (cp_pack_start_sum < cp_payload + 1 ||
2981                 cp_pack_start_sum > blocks_per_seg - 1 -
2982                         NR_CURSEG_TYPE) {
2983                 f2fs_err(sbi, "Wrong cp_pack_start_sum: %u",
2984                          cp_pack_start_sum);
2985                 return 1;
2986         }
2987
2988         if (__is_set_ckpt_flags(ckpt, CP_LARGE_NAT_BITMAP_FLAG) &&
2989                 le32_to_cpu(ckpt->checksum_offset) != CP_MIN_CHKSUM_OFFSET) {
2990                 f2fs_warn(sbi, "using deprecated layout of large_nat_bitmap, "
2991                           "please run fsck v1.13.0 or higher to repair, chksum_offset: %u, "
2992                           "fixed with patch: \"f2fs-tools: relocate chksum_offset for large_nat_bitmap feature\"",
2993                           le32_to_cpu(ckpt->checksum_offset));
2994                 return 1;
2995         }
2996
2997         if (unlikely(f2fs_cp_error(sbi))) {
2998                 f2fs_err(sbi, "A bug case: need to run fsck");
2999                 return 1;
3000         }
3001         return 0;
3002 }
3003
3004 static void init_sb_info(struct f2fs_sb_info *sbi)
3005 {
3006         struct f2fs_super_block *raw_super = sbi->raw_super;
3007         int i;
3008
3009         sbi->log_sectors_per_block =
3010                 le32_to_cpu(raw_super->log_sectors_per_block);
3011         sbi->log_blocksize = le32_to_cpu(raw_super->log_blocksize);
3012         sbi->blocksize = 1 << sbi->log_blocksize;
3013         sbi->log_blocks_per_seg = le32_to_cpu(raw_super->log_blocks_per_seg);
3014         sbi->blocks_per_seg = 1 << sbi->log_blocks_per_seg;
3015         sbi->segs_per_sec = le32_to_cpu(raw_super->segs_per_sec);
3016         sbi->secs_per_zone = le32_to_cpu(raw_super->secs_per_zone);
3017         sbi->total_sections = le32_to_cpu(raw_super->section_count);
3018         sbi->total_node_count =
3019                 (le32_to_cpu(raw_super->segment_count_nat) / 2)
3020                         * sbi->blocks_per_seg * NAT_ENTRY_PER_BLOCK;
3021         sbi->root_ino_num = le32_to_cpu(raw_super->root_ino);
3022         sbi->node_ino_num = le32_to_cpu(raw_super->node_ino);
3023         sbi->meta_ino_num = le32_to_cpu(raw_super->meta_ino);
3024         sbi->cur_victim_sec = NULL_SECNO;
3025         sbi->next_victim_seg[BG_GC] = NULL_SEGNO;
3026         sbi->next_victim_seg[FG_GC] = NULL_SEGNO;
3027         sbi->max_victim_search = DEF_MAX_VICTIM_SEARCH;
3028         sbi->migration_granularity = sbi->segs_per_sec;
3029
3030         sbi->dir_level = DEF_DIR_LEVEL;
3031         sbi->interval_time[CP_TIME] = DEF_CP_INTERVAL;
3032         sbi->interval_time[REQ_TIME] = DEF_IDLE_INTERVAL;
3033         sbi->interval_time[DISCARD_TIME] = DEF_IDLE_INTERVAL;
3034         sbi->interval_time[GC_TIME] = DEF_IDLE_INTERVAL;
3035         sbi->interval_time[DISABLE_TIME] = DEF_DISABLE_INTERVAL;
3036         sbi->interval_time[UMOUNT_DISCARD_TIMEOUT] =
3037                                 DEF_UMOUNT_DISCARD_TIMEOUT;
3038         clear_sbi_flag(sbi, SBI_NEED_FSCK);
3039
3040         for (i = 0; i < NR_COUNT_TYPE; i++)
3041                 atomic_set(&sbi->nr_pages[i], 0);
3042
3043         for (i = 0; i < META; i++)
3044                 atomic_set(&sbi->wb_sync_req[i], 0);
3045
3046         INIT_LIST_HEAD(&sbi->s_list);
3047         mutex_init(&sbi->umount_mutex);
3048         init_rwsem(&sbi->io_order_lock);
3049         spin_lock_init(&sbi->cp_lock);
3050
3051         sbi->dirty_device = 0;
3052         spin_lock_init(&sbi->dev_lock);
3053
3054         init_rwsem(&sbi->sb_lock);
3055         init_rwsem(&sbi->pin_sem);
3056 }
3057
3058 static int init_percpu_info(struct f2fs_sb_info *sbi)
3059 {
3060         int err;
3061
3062         err = percpu_counter_init(&sbi->alloc_valid_block_count, 0, GFP_KERNEL);
3063         if (err)
3064                 return err;
3065
3066         err = percpu_counter_init(&sbi->total_valid_inode_count, 0,
3067                                                                 GFP_KERNEL);
3068         if (err)
3069                 percpu_counter_destroy(&sbi->alloc_valid_block_count);
3070
3071         return err;
3072 }
3073
3074 #ifdef CONFIG_BLK_DEV_ZONED
3075 static int f2fs_report_zone_cb(struct blk_zone *zone, unsigned int idx,
3076                                void *data)
3077 {
3078         struct f2fs_dev_info *dev = data;
3079
3080         if (zone->type != BLK_ZONE_TYPE_CONVENTIONAL)
3081                 set_bit(idx, dev->blkz_seq);
3082         return 0;
3083 }
3084
3085 static int init_blkz_info(struct f2fs_sb_info *sbi, int devi)
3086 {
3087         struct block_device *bdev = FDEV(devi).bdev;
3088         sector_t nr_sectors = bdev->bd_part->nr_sects;
3089         int ret;
3090
3091         if (!f2fs_sb_has_blkzoned(sbi))
3092                 return 0;
3093
3094         if (sbi->blocks_per_blkz && sbi->blocks_per_blkz !=
3095                                 SECTOR_TO_BLOCK(bdev_zone_sectors(bdev)))
3096                 return -EINVAL;
3097         sbi->blocks_per_blkz = SECTOR_TO_BLOCK(bdev_zone_sectors(bdev));
3098         if (sbi->log_blocks_per_blkz && sbi->log_blocks_per_blkz !=
3099                                 __ilog2_u32(sbi->blocks_per_blkz))
3100                 return -EINVAL;
3101         sbi->log_blocks_per_blkz = __ilog2_u32(sbi->blocks_per_blkz);
3102         FDEV(devi).nr_blkz = SECTOR_TO_BLOCK(nr_sectors) >>
3103                                         sbi->log_blocks_per_blkz;
3104         if (nr_sectors & (bdev_zone_sectors(bdev) - 1))
3105                 FDEV(devi).nr_blkz++;
3106
3107         FDEV(devi).blkz_seq = f2fs_kvzalloc(sbi,
3108                                         BITS_TO_LONGS(FDEV(devi).nr_blkz)
3109                                         * sizeof(unsigned long),
3110                                         GFP_KERNEL);
3111         if (!FDEV(devi).blkz_seq)
3112                 return -ENOMEM;
3113
3114         /* Get block zones type */
3115         ret = blkdev_report_zones(bdev, 0, BLK_ALL_ZONES, f2fs_report_zone_cb,
3116                                   &FDEV(devi));
3117         if (ret < 0)
3118                 return ret;
3119
3120         return 0;
3121 }
3122 #endif
3123
3124 /*
3125  * Read f2fs raw super block.
3126  * Because we have two copies of super block, so read both of them
3127  * to get the first valid one. If any one of them is broken, we pass
3128  * them recovery flag back to the caller.
3129  */
3130 static int read_raw_super_block(struct f2fs_sb_info *sbi,
3131                         struct f2fs_super_block **raw_super,
3132                         int *valid_super_block, int *recovery)
3133 {
3134         struct super_block *sb = sbi->sb;
3135         int block;
3136         struct buffer_head *bh;
3137         struct f2fs_super_block *super;
3138         int err = 0;
3139
3140         super = kzalloc(sizeof(struct f2fs_super_block), GFP_KERNEL);
3141         if (!super)
3142                 return -ENOMEM;
3143
3144         for (block = 0; block < 2; block++) {
3145                 bh = sb_bread(sb, block);
3146                 if (!bh) {
3147                         f2fs_err(sbi, "Unable to read %dth superblock",
3148                                  block + 1);
3149                         err = -EIO;
3150                         *recovery = 1;
3151                         continue;
3152                 }
3153
3154                 /* sanity checking of raw super */
3155                 err = sanity_check_raw_super(sbi, bh);
3156                 if (err) {
3157                         f2fs_err(sbi, "Can't find valid F2FS filesystem in %dth superblock",
3158                                  block + 1);
3159                         brelse(bh);
3160                         *recovery = 1;
3161                         continue;
3162                 }
3163
3164                 if (!*raw_super) {
3165                         memcpy(super, bh->b_data + F2FS_SUPER_OFFSET,
3166                                                         sizeof(*super));
3167                         *valid_super_block = block;
3168                         *raw_super = super;
3169                 }
3170                 brelse(bh);
3171         }
3172
3173         /* No valid superblock */
3174         if (!*raw_super)
3175                 kvfree(super);
3176         else
3177                 err = 0;
3178
3179         return err;
3180 }
3181
3182 int f2fs_commit_super(struct f2fs_sb_info *sbi, bool recover)
3183 {
3184         struct buffer_head *bh;
3185         __u32 crc = 0;
3186         int err;
3187
3188         if ((recover && f2fs_readonly(sbi->sb)) ||
3189                                 bdev_read_only(sbi->sb->s_bdev)) {
3190                 set_sbi_flag(sbi, SBI_NEED_SB_WRITE);
3191                 return -EROFS;
3192         }
3193
3194         /* we should update superblock crc here */
3195         if (!recover && f2fs_sb_has_sb_chksum(sbi)) {
3196                 crc = f2fs_crc32(sbi, F2FS_RAW_SUPER(sbi),
3197                                 offsetof(struct f2fs_super_block, crc));
3198                 F2FS_RAW_SUPER(sbi)->crc = cpu_to_le32(crc);
3199         }
3200
3201         /* write back-up superblock first */
3202         bh = sb_bread(sbi->sb, sbi->valid_super_block ? 0 : 1);
3203         if (!bh)
3204                 return -EIO;
3205         err = __f2fs_commit_super(bh, F2FS_RAW_SUPER(sbi));
3206         brelse(bh);
3207
3208         /* if we are in recovery path, skip writing valid superblock */
3209         if (recover || err)
3210                 return err;
3211
3212         /* write current valid superblock */
3213         bh = sb_bread(sbi->sb, sbi->valid_super_block);
3214         if (!bh)
3215                 return -EIO;
3216         err = __f2fs_commit_super(bh, F2FS_RAW_SUPER(sbi));
3217         brelse(bh);
3218         return err;
3219 }
3220
3221 static int f2fs_scan_devices(struct f2fs_sb_info *sbi)
3222 {
3223         struct f2fs_super_block *raw_super = F2FS_RAW_SUPER(sbi);
3224         unsigned int max_devices = MAX_DEVICES;
3225         int i;
3226
3227         /* Initialize single device information */
3228         if (!RDEV(0).path[0]) {
3229                 if (!bdev_is_zoned(sbi->sb->s_bdev))
3230                         return 0;
3231                 max_devices = 1;
3232         }
3233
3234         /*
3235          * Initialize multiple devices information, or single
3236          * zoned block device information.
3237          */
3238         sbi->devs = f2fs_kzalloc(sbi,
3239                                  array_size(max_devices,
3240                                             sizeof(struct f2fs_dev_info)),
3241                                  GFP_KERNEL);
3242         if (!sbi->devs)
3243                 return -ENOMEM;
3244
3245         for (i = 0; i < max_devices; i++) {
3246
3247                 if (i > 0 && !RDEV(i).path[0])
3248                         break;
3249
3250                 if (max_devices == 1) {
3251                         /* Single zoned block device mount */
3252                         FDEV(0).bdev =
3253                                 blkdev_get_by_dev(sbi->sb->s_bdev->bd_dev,
3254                                         sbi->sb->s_mode, sbi->sb->s_type);
3255                 } else {
3256                         /* Multi-device mount */
3257                         memcpy(FDEV(i).path, RDEV(i).path, MAX_PATH_LEN);
3258                         FDEV(i).total_segments =
3259                                 le32_to_cpu(RDEV(i).total_segments);
3260                         if (i == 0) {
3261                                 FDEV(i).start_blk = 0;
3262                                 FDEV(i).end_blk = FDEV(i).start_blk +
3263                                     (FDEV(i).total_segments <<
3264                                     sbi->log_blocks_per_seg) - 1 +
3265                                     le32_to_cpu(raw_super->segment0_blkaddr);
3266                         } else {
3267                                 FDEV(i).start_blk = FDEV(i - 1).end_blk + 1;
3268                                 FDEV(i).end_blk = FDEV(i).start_blk +
3269                                         (FDEV(i).total_segments <<
3270                                         sbi->log_blocks_per_seg) - 1;
3271                         }
3272                         FDEV(i).bdev = blkdev_get_by_path(FDEV(i).path,
3273                                         sbi->sb->s_mode, sbi->sb->s_type);
3274                 }
3275                 if (IS_ERR(FDEV(i).bdev))
3276                         return PTR_ERR(FDEV(i).bdev);
3277
3278                 /* to release errored devices */
3279                 sbi->s_ndevs = i + 1;
3280
3281 #ifdef CONFIG_BLK_DEV_ZONED
3282                 if (bdev_zoned_model(FDEV(i).bdev) == BLK_ZONED_HM &&
3283                                 !f2fs_sb_has_blkzoned(sbi)) {
3284                         f2fs_err(sbi, "Zoned block device feature not enabled\n");
3285                         return -EINVAL;
3286                 }
3287                 if (bdev_zoned_model(FDEV(i).bdev) != BLK_ZONED_NONE) {
3288                         if (init_blkz_info(sbi, i)) {
3289                                 f2fs_err(sbi, "Failed to initialize F2FS blkzone information");
3290                                 return -EINVAL;
3291                         }
3292                         if (max_devices == 1)
3293                                 break;
3294                         f2fs_info(sbi, "Mount Device [%2d]: %20s, %8u, %8x - %8x (zone: %s)",
3295                                   i, FDEV(i).path,
3296                                   FDEV(i).total_segments,
3297                                   FDEV(i).start_blk, FDEV(i).end_blk,
3298                                   bdev_zoned_model(FDEV(i).bdev) == BLK_ZONED_HA ?
3299                                   "Host-aware" : "Host-managed");
3300                         continue;
3301                 }
3302 #endif
3303                 f2fs_info(sbi, "Mount Device [%2d]: %20s, %8u, %8x - %8x",
3304                           i, FDEV(i).path,
3305                           FDEV(i).total_segments,
3306                           FDEV(i).start_blk, FDEV(i).end_blk);
3307         }
3308         f2fs_info(sbi,
3309                   "IO Block Size: %8d KB", F2FS_IO_SIZE_KB(sbi));
3310         return 0;
3311 }
3312
3313 static int f2fs_setup_casefold(struct f2fs_sb_info *sbi)
3314 {
3315 #ifdef CONFIG_UNICODE
3316         if (f2fs_sb_has_casefold(sbi) && !sbi->s_encoding) {
3317                 const struct f2fs_sb_encodings *encoding_info;
3318                 struct unicode_map *encoding;
3319                 __u16 encoding_flags;
3320
3321                 if (f2fs_sb_has_encrypt(sbi)) {
3322                         f2fs_err(sbi,
3323                                 "Can't mount with encoding and encryption");
3324                         return -EINVAL;
3325                 }
3326
3327                 if (f2fs_sb_read_encoding(sbi->raw_super, &encoding_info,
3328                                           &encoding_flags)) {
3329                         f2fs_err(sbi,
3330                                  "Encoding requested by superblock is unknown");
3331                         return -EINVAL;
3332                 }
3333
3334                 encoding = utf8_load(encoding_info->version);
3335                 if (IS_ERR(encoding)) {
3336                         f2fs_err(sbi,
3337                                  "can't mount with superblock charset: %s-%s "
3338                                  "not supported by the kernel. flags: 0x%x.",
3339                                  encoding_info->name, encoding_info->version,
3340                                  encoding_flags);
3341                         return PTR_ERR(encoding);
3342                 }
3343                 f2fs_info(sbi, "Using encoding defined by superblock: "
3344                          "%s-%s with flags 0x%hx", encoding_info->name,
3345                          encoding_info->version?:"\b", encoding_flags);
3346
3347                 sbi->s_encoding = encoding;
3348                 sbi->s_encoding_flags = encoding_flags;
3349                 sbi->sb->s_d_op = &f2fs_dentry_ops;
3350         }
3351 #else
3352         if (f2fs_sb_has_casefold(sbi)) {
3353                 f2fs_err(sbi, "Filesystem with casefold feature cannot be mounted without CONFIG_UNICODE");
3354                 return -EINVAL;
3355         }
3356 #endif
3357         return 0;
3358 }
3359
3360 static void f2fs_tuning_parameters(struct f2fs_sb_info *sbi)
3361 {
3362         struct f2fs_sm_info *sm_i = SM_I(sbi);
3363
3364         /* adjust parameters according to the volume size */
3365         if (sm_i->main_segments <= SMALL_VOLUME_SEGMENTS) {
3366                 F2FS_OPTION(sbi).alloc_mode = ALLOC_MODE_REUSE;
3367                 sm_i->dcc_info->discard_granularity = 1;
3368                 sm_i->ipu_policy = 1 << F2FS_IPU_FORCE;
3369         }
3370
3371         sbi->readdir_ra = 1;
3372 }
3373
3374 static int f2fs_fill_super(struct super_block *sb, void *data, int silent)
3375 {
3376         struct f2fs_sb_info *sbi;
3377         struct f2fs_super_block *raw_super;
3378         struct inode *root;
3379         int err;
3380         bool skip_recovery = false, need_fsck = false;
3381         char *options = NULL;
3382         int recovery, i, valid_super_block;
3383         struct curseg_info *seg_i;
3384         int retry_cnt = 1;
3385
3386 try_onemore:
3387         err = -EINVAL;
3388         raw_super = NULL;
3389         valid_super_block = -1;
3390         recovery = 0;
3391
3392         /* allocate memory for f2fs-specific super block info */
3393         sbi = kzalloc(sizeof(struct f2fs_sb_info), GFP_KERNEL);
3394         if (!sbi)
3395                 return -ENOMEM;
3396
3397         sbi->sb = sb;
3398
3399         /* Load the checksum driver */
3400         sbi->s_chksum_driver = crypto_alloc_shash("crc32", 0, 0);
3401         if (IS_ERR(sbi->s_chksum_driver)) {
3402                 f2fs_err(sbi, "Cannot load crc32 driver.");
3403                 err = PTR_ERR(sbi->s_chksum_driver);
3404                 sbi->s_chksum_driver = NULL;
3405                 goto free_sbi;
3406         }
3407
3408         /* set a block size */
3409         if (unlikely(!sb_set_blocksize(sb, F2FS_BLKSIZE))) {
3410                 f2fs_err(sbi, "unable to set blocksize");
3411                 goto free_sbi;
3412         }
3413
3414         err = read_raw_super_block(sbi, &raw_super, &valid_super_block,
3415                                                                 &recovery);
3416         if (err)
3417                 goto free_sbi;
3418
3419         sb->s_fs_info = sbi;
3420         sbi->raw_super = raw_super;
3421
3422         /* precompute checksum seed for metadata */
3423         if (f2fs_sb_has_inode_chksum(sbi))
3424                 sbi->s_chksum_seed = f2fs_chksum(sbi, ~0, raw_super->uuid,
3425                                                 sizeof(raw_super->uuid));
3426
3427         /*
3428          * The BLKZONED feature indicates that the drive was formatted with
3429          * zone alignment optimization. This is optional for host-aware
3430          * devices, but mandatory for host-managed zoned block devices.
3431          */
3432 #ifndef CONFIG_BLK_DEV_ZONED
3433         if (f2fs_sb_has_blkzoned(sbi)) {
3434                 f2fs_err(sbi, "Zoned block device support is not enabled");
3435                 err = -EOPNOTSUPP;
3436                 goto free_sb_buf;
3437         }
3438 #endif
3439         default_options(sbi);
3440         /* parse mount options */
3441         options = kstrdup((const char *)data, GFP_KERNEL);
3442         if (data && !options) {
3443                 err = -ENOMEM;
3444                 goto free_sb_buf;
3445         }
3446
3447         err = parse_options(sb, options, false);
3448         if (err)
3449                 goto free_options;
3450
3451         sbi->max_file_blocks = max_file_blocks();
3452         sb->s_maxbytes = sbi->max_file_blocks <<
3453                                 le32_to_cpu(raw_super->log_blocksize);
3454         sb->s_max_links = F2FS_LINK_MAX;
3455
3456         err = f2fs_setup_casefold(sbi);
3457         if (err)
3458                 goto free_options;
3459
3460 #ifdef CONFIG_QUOTA
3461         sb->dq_op = &f2fs_quota_operations;
3462         sb->s_qcop = &f2fs_quotactl_ops;
3463         sb->s_quota_types = QTYPE_MASK_USR | QTYPE_MASK_GRP | QTYPE_MASK_PRJ;
3464
3465         if (f2fs_sb_has_quota_ino(sbi)) {
3466                 for (i = 0; i < MAXQUOTAS; i++) {
3467                         if (f2fs_qf_ino(sbi->sb, i))
3468                                 sbi->nquota_files++;
3469                 }
3470         }
3471 #endif
3472
3473         sb->s_op = &f2fs_sops;
3474 #ifdef CONFIG_FS_ENCRYPTION
3475         sb->s_cop = &f2fs_cryptops;
3476 #endif
3477 #ifdef CONFIG_FS_VERITY
3478         sb->s_vop = &f2fs_verityops;
3479 #endif
3480         sb->s_xattr = f2fs_xattr_handlers;
3481         sb->s_export_op = &f2fs_export_ops;
3482         sb->s_magic = F2FS_SUPER_MAGIC;
3483         sb->s_time_gran = 1;
3484         sb->s_flags = (sb->s_flags & ~SB_POSIXACL) |
3485                 (test_opt(sbi, POSIX_ACL) ? SB_POSIXACL : 0);
3486         memcpy(&sb->s_uuid, raw_super->uuid, sizeof(raw_super->uuid));
3487         sb->s_iflags |= SB_I_CGROUPWB;
3488
3489         /* init f2fs-specific super block info */
3490         sbi->valid_super_block = valid_super_block;
3491         init_rwsem(&sbi->gc_lock);
3492         mutex_init(&sbi->writepages);
3493         mutex_init(&sbi->cp_mutex);
3494         init_rwsem(&sbi->node_write);
3495         init_rwsem(&sbi->node_change);
3496
3497         /* disallow all the data/node/meta page writes */
3498         set_sbi_flag(sbi, SBI_POR_DOING);
3499         spin_lock_init(&sbi->stat_lock);
3500
3501         /* init iostat info */
3502         spin_lock_init(&sbi->iostat_lock);
3503         sbi->iostat_enable = false;
3504         sbi->iostat_period_ms = DEFAULT_IOSTAT_PERIOD_MS;
3505
3506         for (i = 0; i < NR_PAGE_TYPE; i++) {
3507                 int n = (i == META) ? 1: NR_TEMP_TYPE;
3508                 int j;
3509
3510                 sbi->write_io[i] =
3511                         f2fs_kmalloc(sbi,
3512                                      array_size(n,
3513                                                 sizeof(struct f2fs_bio_info)),
3514                                      GFP_KERNEL);
3515                 if (!sbi->write_io[i]) {
3516                         err = -ENOMEM;
3517                         goto free_bio_info;
3518                 }
3519
3520                 for (j = HOT; j < n; j++) {
3521                         init_rwsem(&sbi->write_io[i][j].io_rwsem);
3522                         sbi->write_io[i][j].sbi = sbi;
3523                         sbi->write_io[i][j].bio = NULL;
3524                         spin_lock_init(&sbi->write_io[i][j].io_lock);
3525                         INIT_LIST_HEAD(&sbi->write_io[i][j].io_list);
3526                         INIT_LIST_HEAD(&sbi->write_io[i][j].bio_list);
3527                         init_rwsem(&sbi->write_io[i][j].bio_list_lock);
3528                 }
3529         }
3530
3531         init_rwsem(&sbi->cp_rwsem);
3532         init_rwsem(&sbi->quota_sem);
3533         init_waitqueue_head(&sbi->cp_wait);
3534         init_sb_info(sbi);
3535
3536         err = init_percpu_info(sbi);
3537         if (err)
3538                 goto free_bio_info;
3539
3540         if (F2FS_IO_ALIGNED(sbi)) {
3541                 sbi->write_io_dummy =
3542                         mempool_create_page_pool(2 * (F2FS_IO_SIZE(sbi) - 1), 0);
3543                 if (!sbi->write_io_dummy) {
3544                         err = -ENOMEM;
3545                         goto free_percpu;
3546                 }
3547         }
3548
3549         /* init per sbi slab cache */
3550         err = f2fs_init_xattr_caches(sbi);
3551         if (err)
3552                 goto free_io_dummy;
3553
3554         /* get an inode for meta space */
3555         sbi->meta_inode = f2fs_iget(sb, F2FS_META_INO(sbi));
3556         if (IS_ERR(sbi->meta_inode)) {
3557                 f2fs_err(sbi, "Failed to read F2FS meta data inode");
3558                 err = PTR_ERR(sbi->meta_inode);
3559                 goto free_xattr_cache;
3560         }
3561
3562         err = f2fs_get_valid_checkpoint(sbi);
3563         if (err) {
3564                 f2fs_err(sbi, "Failed to get valid F2FS checkpoint");
3565                 goto free_meta_inode;
3566         }
3567
3568         if (__is_set_ckpt_flags(F2FS_CKPT(sbi), CP_QUOTA_NEED_FSCK_FLAG))
3569                 set_sbi_flag(sbi, SBI_QUOTA_NEED_REPAIR);
3570         if (__is_set_ckpt_flags(F2FS_CKPT(sbi), CP_DISABLED_QUICK_FLAG)) {
3571                 set_sbi_flag(sbi, SBI_CP_DISABLED_QUICK);
3572                 sbi->interval_time[DISABLE_TIME] = DEF_DISABLE_QUICK_INTERVAL;
3573         }
3574
3575         if (__is_set_ckpt_flags(F2FS_CKPT(sbi), CP_FSCK_FLAG))
3576                 set_sbi_flag(sbi, SBI_NEED_FSCK);
3577
3578         /* Initialize device list */
3579         err = f2fs_scan_devices(sbi);
3580         if (err) {
3581                 f2fs_err(sbi, "Failed to find devices");
3582                 goto free_devices;
3583         }
3584
3585         err = f2fs_init_post_read_wq(sbi);
3586         if (err) {
3587                 f2fs_err(sbi, "Failed to initialize post read workqueue");
3588                 goto free_devices;
3589         }
3590
3591         sbi->total_valid_node_count =
3592                                 le32_to_cpu(sbi->ckpt->valid_node_count);
3593         percpu_counter_set(&sbi->total_valid_inode_count,
3594                                 le32_to_cpu(sbi->ckpt->valid_inode_count));
3595         sbi->user_block_count = le64_to_cpu(sbi->ckpt->user_block_count);
3596         sbi->total_valid_block_count =
3597                                 le64_to_cpu(sbi->ckpt->valid_block_count);
3598         sbi->last_valid_block_count = sbi->total_valid_block_count;
3599         sbi->reserved_blocks = 0;
3600         sbi->current_reserved_blocks = 0;
3601         limit_reserve_root(sbi);
3602         adjust_unusable_cap_perc(sbi);
3603
3604         for (i = 0; i < NR_INODE_TYPE; i++) {
3605                 INIT_LIST_HEAD(&sbi->inode_list[i]);
3606                 spin_lock_init(&sbi->inode_lock[i]);
3607         }
3608         mutex_init(&sbi->flush_lock);
3609
3610         f2fs_init_extent_cache_info(sbi);
3611
3612         f2fs_init_ino_entry_info(sbi);
3613
3614         f2fs_init_fsync_node_info(sbi);
3615
3616         /* setup f2fs internal modules */
3617         err = f2fs_build_segment_manager(sbi);
3618         if (err) {
3619                 f2fs_err(sbi, "Failed to initialize F2FS segment manager (%d)",
3620                          err);
3621                 goto free_sm;
3622         }
3623         err = f2fs_build_node_manager(sbi);
3624         if (err) {
3625                 f2fs_err(sbi, "Failed to initialize F2FS node manager (%d)",
3626                          err);
3627                 goto free_nm;
3628         }
3629
3630         /* For write statistics */
3631         if (sb->s_bdev->bd_part)
3632                 sbi->sectors_written_start =
3633                         (u64)part_stat_read(sb->s_bdev->bd_part,
3634                                             sectors[STAT_WRITE]);
3635
3636         /* Read accumulated write IO statistics if exists */
3637         seg_i = CURSEG_I(sbi, CURSEG_HOT_NODE);
3638         if (__exist_node_summaries(sbi))
3639                 sbi->kbytes_written =
3640                         le64_to_cpu(seg_i->journal->info.kbytes_written);
3641
3642         f2fs_build_gc_manager(sbi);
3643
3644         err = f2fs_build_stats(sbi);
3645         if (err)
3646                 goto free_nm;
3647
3648         /* get an inode for node space */
3649         sbi->node_inode = f2fs_iget(sb, F2FS_NODE_INO(sbi));
3650         if (IS_ERR(sbi->node_inode)) {
3651                 f2fs_err(sbi, "Failed to read node inode");
3652                 err = PTR_ERR(sbi->node_inode);
3653                 goto free_stats;
3654         }
3655
3656         /* read root inode and dentry */
3657         root = f2fs_iget(sb, F2FS_ROOT_INO(sbi));
3658         if (IS_ERR(root)) {
3659                 f2fs_err(sbi, "Failed to read root inode");
3660                 err = PTR_ERR(root);
3661                 goto free_node_inode;
3662         }
3663         if (!S_ISDIR(root->i_mode) || !root->i_blocks ||
3664                         !root->i_size || !root->i_nlink) {
3665                 iput(root);
3666                 err = -EINVAL;
3667                 goto free_node_inode;
3668         }
3669
3670         sb->s_root = d_make_root(root); /* allocate root dentry */
3671         if (!sb->s_root) {
3672                 err = -ENOMEM;
3673                 goto free_node_inode;
3674         }
3675
3676         err = f2fs_register_sysfs(sbi);
3677         if (err)
3678                 goto free_root_inode;
3679
3680 #ifdef CONFIG_QUOTA
3681         /* Enable quota usage during mount */
3682         if (f2fs_sb_has_quota_ino(sbi) && !f2fs_readonly(sb)) {
3683                 err = f2fs_enable_quotas(sb);
3684                 if (err)
3685                         f2fs_err(sbi, "Cannot turn on quotas: error %d", err);
3686         }
3687 #endif
3688         /* if there are any orphan inodes, free them */
3689         err = f2fs_recover_orphan_inodes(sbi);
3690         if (err)
3691                 goto free_meta;
3692
3693         if (unlikely(is_set_ckpt_flags(sbi, CP_DISABLED_FLAG)))
3694                 goto reset_checkpoint;
3695
3696         /* recover fsynced data */
3697         if (!test_opt(sbi, DISABLE_ROLL_FORWARD) &&
3698                         !test_opt(sbi, NORECOVERY)) {
3699                 /*
3700                  * mount should be failed, when device has readonly mode, and
3701                  * previous checkpoint was not done by clean system shutdown.
3702                  */
3703                 if (f2fs_hw_is_readonly(sbi)) {
3704                         if (!is_set_ckpt_flags(sbi, CP_UMOUNT_FLAG)) {
3705                                 err = -EROFS;
3706                                 f2fs_err(sbi, "Need to recover fsync data, but write access unavailable");
3707                                 goto free_meta;
3708                         }
3709                         f2fs_info(sbi, "write access unavailable, skipping recovery");
3710                         goto reset_checkpoint;
3711                 }
3712
3713                 if (need_fsck)
3714                         set_sbi_flag(sbi, SBI_NEED_FSCK);
3715
3716                 if (skip_recovery)
3717                         goto reset_checkpoint;
3718
3719                 err = f2fs_recover_fsync_data(sbi, false);
3720                 if (err < 0) {
3721                         if (err != -ENOMEM)
3722                                 skip_recovery = true;
3723                         need_fsck = true;
3724                         f2fs_err(sbi, "Cannot recover all fsync data errno=%d",
3725                                  err);
3726                         goto free_meta;
3727                 }
3728         } else {
3729                 err = f2fs_recover_fsync_data(sbi, true);
3730
3731                 if (!f2fs_readonly(sb) && err > 0) {
3732                         err = -EINVAL;
3733                         f2fs_err(sbi, "Need to recover fsync data");
3734                         goto free_meta;
3735                 }
3736         }
3737
3738         /*
3739          * If the f2fs is not readonly and fsync data recovery succeeds,
3740          * check zoned block devices' write pointer consistency.
3741          */
3742         if (!err && !f2fs_readonly(sb) && f2fs_sb_has_blkzoned(sbi)) {
3743                 err = f2fs_check_write_pointer(sbi);
3744                 if (err)
3745                         goto free_meta;
3746         }
3747
3748 reset_checkpoint:
3749         /* f2fs_recover_fsync_data() cleared this already */
3750         clear_sbi_flag(sbi, SBI_POR_DOING);
3751
3752         if (test_opt(sbi, DISABLE_CHECKPOINT)) {
3753                 err = f2fs_disable_checkpoint(sbi);
3754                 if (err)
3755                         goto sync_free_meta;
3756         } else if (is_set_ckpt_flags(sbi, CP_DISABLED_FLAG)) {
3757                 f2fs_enable_checkpoint(sbi);
3758         }
3759
3760         /*
3761          * If filesystem is not mounted as read-only then
3762          * do start the gc_thread.
3763          */
3764         if (F2FS_OPTION(sbi).bggc_mode != BGGC_MODE_OFF && !f2fs_readonly(sb)) {
3765                 /* After POR, we can run background GC thread.*/
3766                 err = f2fs_start_gc_thread(sbi);
3767                 if (err)
3768                         goto sync_free_meta;
3769         }
3770         kvfree(options);
3771
3772         /* recover broken superblock */
3773         if (recovery) {
3774                 err = f2fs_commit_super(sbi, true);
3775                 f2fs_info(sbi, "Try to recover %dth superblock, ret: %d",
3776                           sbi->valid_super_block ? 1 : 2, err);
3777         }
3778
3779         f2fs_join_shrinker(sbi);
3780
3781         f2fs_tuning_parameters(sbi);
3782
3783         f2fs_notice(sbi, "Mounted with checkpoint version = %llx",
3784                     cur_cp_version(F2FS_CKPT(sbi)));
3785         f2fs_update_time(sbi, CP_TIME);
3786         f2fs_update_time(sbi, REQ_TIME);
3787         clear_sbi_flag(sbi, SBI_CP_DISABLED_QUICK);
3788         return 0;
3789
3790 sync_free_meta:
3791         /* safe to flush all the data */
3792         sync_filesystem(sbi->sb);
3793         retry_cnt = 0;
3794
3795 free_meta:
3796 #ifdef CONFIG_QUOTA
3797         f2fs_truncate_quota_inode_pages(sb);
3798         if (f2fs_sb_has_quota_ino(sbi) && !f2fs_readonly(sb))
3799                 f2fs_quota_off_umount(sbi->sb);
3800 #endif
3801         /*
3802          * Some dirty meta pages can be produced by f2fs_recover_orphan_inodes()
3803          * failed by EIO. Then, iput(node_inode) can trigger balance_fs_bg()
3804          * followed by f2fs_write_checkpoint() through f2fs_write_node_pages(), which
3805          * falls into an infinite loop in f2fs_sync_meta_pages().
3806          */
3807         truncate_inode_pages_final(META_MAPPING(sbi));
3808         /* evict some inodes being cached by GC */
3809         evict_inodes(sb);
3810         f2fs_unregister_sysfs(sbi);
3811 free_root_inode:
3812         dput(sb->s_root);
3813         sb->s_root = NULL;
3814 free_node_inode:
3815         f2fs_release_ino_entry(sbi, true);
3816         truncate_inode_pages_final(NODE_MAPPING(sbi));
3817         iput(sbi->node_inode);
3818         sbi->node_inode = NULL;
3819 free_stats:
3820         f2fs_destroy_stats(sbi);
3821 free_nm:
3822         f2fs_destroy_node_manager(sbi);
3823 free_sm:
3824         f2fs_destroy_segment_manager(sbi);
3825         f2fs_destroy_post_read_wq(sbi);
3826 free_devices:
3827         destroy_device_list(sbi);
3828         kvfree(sbi->ckpt);
3829 free_meta_inode:
3830         make_bad_inode(sbi->meta_inode);
3831         iput(sbi->meta_inode);
3832         sbi->meta_inode = NULL;
3833 free_xattr_cache:
3834         f2fs_destroy_xattr_caches(sbi);
3835 free_io_dummy:
3836         mempool_destroy(sbi->write_io_dummy);
3837 free_percpu:
3838         destroy_percpu_info(sbi);
3839 free_bio_info:
3840         for (i = 0; i < NR_PAGE_TYPE; i++)
3841                 kvfree(sbi->write_io[i]);
3842
3843 #ifdef CONFIG_UNICODE
3844         utf8_unload(sbi->s_encoding);
3845 #endif
3846 free_options:
3847 #ifdef CONFIG_QUOTA
3848         for (i = 0; i < MAXQUOTAS; i++)
3849                 kvfree(F2FS_OPTION(sbi).s_qf_names[i]);
3850 #endif
3851         fscrypt_free_dummy_context(&F2FS_OPTION(sbi).dummy_enc_ctx);
3852         kvfree(options);
3853 free_sb_buf:
3854         kvfree(raw_super);
3855 free_sbi:
3856         if (sbi->s_chksum_driver)
3857                 crypto_free_shash(sbi->s_chksum_driver);
3858         kvfree(sbi);
3859
3860         /* give only one another chance */
3861         if (retry_cnt > 0 && skip_recovery) {
3862                 retry_cnt--;
3863                 shrink_dcache_sb(sb);
3864                 goto try_onemore;
3865         }
3866         return err;
3867 }
3868
3869 static struct dentry *f2fs_mount(struct file_system_type *fs_type, int flags,
3870                         const char *dev_name, void *data)
3871 {
3872         return mount_bdev(fs_type, flags, dev_name, data, f2fs_fill_super);
3873 }
3874
3875 static void kill_f2fs_super(struct super_block *sb)
3876 {
3877         if (sb->s_root) {
3878                 struct f2fs_sb_info *sbi = F2FS_SB(sb);
3879
3880                 set_sbi_flag(sbi, SBI_IS_CLOSE);
3881                 f2fs_stop_gc_thread(sbi);
3882                 f2fs_stop_discard_thread(sbi);
3883
3884                 if (is_sbi_flag_set(sbi, SBI_IS_DIRTY) ||
3885                                 !is_set_ckpt_flags(sbi, CP_UMOUNT_FLAG)) {
3886                         struct cp_control cpc = {
3887                                 .reason = CP_UMOUNT,
3888                         };
3889                         f2fs_write_checkpoint(sbi, &cpc);
3890                 }
3891
3892                 if (is_sbi_flag_set(sbi, SBI_IS_RECOVERED) && f2fs_readonly(sb))
3893                         sb->s_flags &= ~SB_RDONLY;
3894         }
3895         kill_block_super(sb);
3896 }
3897
3898 static struct file_system_type f2fs_fs_type = {
3899         .owner          = THIS_MODULE,
3900         .name           = "f2fs",
3901         .mount          = f2fs_mount,
3902         .kill_sb        = kill_f2fs_super,
3903         .fs_flags       = FS_REQUIRES_DEV,
3904 };
3905 MODULE_ALIAS_FS("f2fs");
3906
3907 static int __init init_inodecache(void)
3908 {
3909         f2fs_inode_cachep = kmem_cache_create("f2fs_inode_cache",
3910                         sizeof(struct f2fs_inode_info), 0,
3911                         SLAB_RECLAIM_ACCOUNT|SLAB_ACCOUNT, NULL);
3912         if (!f2fs_inode_cachep)
3913                 return -ENOMEM;
3914         return 0;
3915 }
3916
3917 static void destroy_inodecache(void)
3918 {
3919         /*
3920          * Make sure all delayed rcu free inodes are flushed before we
3921          * destroy cache.
3922          */
3923         rcu_barrier();
3924         kmem_cache_destroy(f2fs_inode_cachep);
3925 }
3926
3927 static int __init init_f2fs_fs(void)
3928 {
3929         int err;
3930
3931         if (PAGE_SIZE != F2FS_BLKSIZE) {
3932                 printk("F2FS not supported on PAGE_SIZE(%lu) != %d\n",
3933                                 PAGE_SIZE, F2FS_BLKSIZE);
3934                 return -EINVAL;
3935         }
3936
3937         f2fs_build_trace_ios();
3938
3939         err = init_inodecache();
3940         if (err)
3941                 goto fail;
3942         err = f2fs_create_node_manager_caches();
3943         if (err)
3944                 goto free_inodecache;
3945         err = f2fs_create_segment_manager_caches();
3946         if (err)
3947                 goto free_node_manager_caches;
3948         err = f2fs_create_checkpoint_caches();
3949         if (err)
3950                 goto free_segment_manager_caches;
3951         err = f2fs_create_extent_cache();
3952         if (err)
3953                 goto free_checkpoint_caches;
3954         err = f2fs_init_sysfs();
3955         if (err)
3956                 goto free_extent_cache;
3957         err = register_shrinker(&f2fs_shrinker_info);
3958         if (err)
3959                 goto free_sysfs;
3960         err = register_filesystem(&f2fs_fs_type);
3961         if (err)
3962                 goto free_shrinker;
3963         f2fs_create_root_stats();
3964         err = f2fs_init_post_read_processing();
3965         if (err)
3966                 goto free_root_stats;
3967         err = f2fs_init_bio_entry_cache();
3968         if (err)
3969                 goto free_post_read;
3970         err = f2fs_init_bioset();
3971         if (err)
3972                 goto free_bio_enrty_cache;
3973         err = f2fs_init_compress_mempool();
3974         if (err)
3975                 goto free_bioset;
3976         return 0;
3977 free_bioset:
3978         f2fs_destroy_bioset();
3979 free_bio_enrty_cache:
3980         f2fs_destroy_bio_entry_cache();
3981 free_post_read:
3982         f2fs_destroy_post_read_processing();
3983 free_root_stats:
3984         f2fs_destroy_root_stats();
3985         unregister_filesystem(&f2fs_fs_type);
3986 free_shrinker:
3987         unregister_shrinker(&f2fs_shrinker_info);
3988 free_sysfs:
3989         f2fs_exit_sysfs();
3990 free_extent_cache:
3991         f2fs_destroy_extent_cache();
3992 free_checkpoint_caches:
3993         f2fs_destroy_checkpoint_caches();
3994 free_segment_manager_caches:
3995         f2fs_destroy_segment_manager_caches();
3996 free_node_manager_caches:
3997         f2fs_destroy_node_manager_caches();
3998 free_inodecache:
3999         destroy_inodecache();
4000 fail:
4001         return err;
4002 }
4003
4004 static void __exit exit_f2fs_fs(void)
4005 {
4006         f2fs_destroy_compress_mempool();
4007         f2fs_destroy_bioset();
4008         f2fs_destroy_bio_entry_cache();
4009         f2fs_destroy_post_read_processing();
4010         f2fs_destroy_root_stats();
4011         unregister_filesystem(&f2fs_fs_type);
4012         unregister_shrinker(&f2fs_shrinker_info);
4013         f2fs_exit_sysfs();
4014         f2fs_destroy_extent_cache();
4015         f2fs_destroy_checkpoint_caches();
4016         f2fs_destroy_segment_manager_caches();
4017         f2fs_destroy_node_manager_caches();
4018         destroy_inodecache();
4019         f2fs_destroy_trace_ios();
4020 }
4021
4022 module_init(init_f2fs_fs)
4023 module_exit(exit_f2fs_fs)
4024
4025 MODULE_AUTHOR("Samsung Electronics's Praesto Team");
4026 MODULE_DESCRIPTION("Flash Friendly File System");
4027 MODULE_LICENSE("GPL");
4028