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         kfree(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         kfree(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 #ifdef CONFIG_F2FS_FS_COMPRESSION
 466         unsigned char (*ext)[F2FS_EXTENSION_LEN];
 467         int ext_cnt;
 468 #endif
 469         char *p, *name;
 470         int arg = 0;
 471         kuid_t uid;
 472         kgid_t gid;
 473         int ret;
 474
 475         if (!options)
 476                 return 0;
 477
 478         while ((p = strsep(&options, ",")) != NULL) {
 479                 int token;
 480                 if (!*p)
 481                         continue;
 482                 /*
 483                  * Initialize args struct so we know whether arg was
 484                  * found; some options take optional arguments.
 485                  */
 486                 args[0].to = args[0].from = NULL;
 487                 token = match_token(p, f2fs_tokens, args);
 488
 489                 switch (token) {
 490                 case Opt_gc_background:
 491                         name = match_strdup(&args[0]);
 492
 493                         if (!name)
 494                                 return -ENOMEM;
 495                         if (!strcmp(name, "on")) {
 496                                 F2FS_OPTION(sbi).bggc_mode = BGGC_MODE_ON;
 497                         } else if (!strcmp(name, "off")) {
 498                                 F2FS_OPTION(sbi).bggc_mode = BGGC_MODE_OFF;
 499                         } else if (!strcmp(name, "sync")) {
 500                                 F2FS_OPTION(sbi).bggc_mode = BGGC_MODE_SYNC;
 501                         } else {
 502                                 kfree(name);
 503                                 return -EINVAL;
 504                         }
 505                         kfree(name);
 506                         break;
 507                 case Opt_disable_roll_forward:
 508                         set_opt(sbi, DISABLE_ROLL_FORWARD);
 509                         break;
 510                 case Opt_norecovery:
 511                         /* this option mounts f2fs with ro */
 512                         set_opt(sbi, NORECOVERY);
 513                         if (!f2fs_readonly(sb))
 514                                 return -EINVAL;
 515                         break;
 516                 case Opt_discard:
 517                         set_opt(sbi, DISCARD);
 518                         break;
 519                 case Opt_nodiscard:
 520                         if (f2fs_sb_has_blkzoned(sbi)) {
 521                                 f2fs_warn(sbi, "discard is required for zoned block devices");
 522                                 return -EINVAL;
 523                         }
 524                         clear_opt(sbi, DISCARD);
 525                         break;
 526                 case Opt_noheap:
 527                         set_opt(sbi, NOHEAP);
 528                         break;
 529                 case Opt_heap:
 530                         clear_opt(sbi, NOHEAP);
 531                         break;
 532 #ifdef CONFIG_F2FS_FS_XATTR
 533                 case Opt_user_xattr:
 534                         set_opt(sbi, XATTR_USER);
 535                         break;
 536                 case Opt_nouser_xattr:
 537                         clear_opt(sbi, XATTR_USER);
 538                         break;
 539                 case Opt_inline_xattr:
 540                         set_opt(sbi, INLINE_XATTR);
 541                         break;
 542                 case Opt_noinline_xattr:
 543                         clear_opt(sbi, INLINE_XATTR);
 544                         break;
 545                 case Opt_inline_xattr_size:
 546                         if (args->from && match_int(args, &arg))
 547                                 return -EINVAL;
 548                         set_opt(sbi, INLINE_XATTR_SIZE);
 549                         F2FS_OPTION(sbi).inline_xattr_size = arg;
 550                         break;
 551 #else
 552                 case Opt_user_xattr:
 553                         f2fs_info(sbi, "user_xattr options not supported");
 554                         break;
 555                 case Opt_nouser_xattr:
 556                         f2fs_info(sbi, "nouser_xattr options not supported");
 557                         break;
 558                 case Opt_inline_xattr:
 559                         f2fs_info(sbi, "inline_xattr options not supported");
 560                         break;
 561                 case Opt_noinline_xattr:
 562                         f2fs_info(sbi, "noinline_xattr options not supported");
 563                         break;
 564 #endif
 565 #ifdef CONFIG_F2FS_FS_POSIX_ACL
 566                 case Opt_acl:
 567                         set_opt(sbi, POSIX_ACL);
 568                         break;
 569                 case Opt_noacl:
 570                         clear_opt(sbi, POSIX_ACL);
 571                         break;
 572 #else
 573                 case Opt_acl:
 574                         f2fs_info(sbi, "acl options not supported");
 575                         break;
 576                 case Opt_noacl:
 577                         f2fs_info(sbi, "noacl options not supported");
 578                         break;
 579 #endif
 580                 case Opt_active_logs:
 581                         if (args->from && match_int(args, &arg))
 582                                 return -EINVAL;
 583                         if (arg != 2 && arg != 4 && arg != NR_CURSEG_TYPE)
 584                                 return -EINVAL;
 585                         F2FS_OPTION(sbi).active_logs = arg;
 586                         break;
 587                 case Opt_disable_ext_identify:
 588                         set_opt(sbi, DISABLE_EXT_IDENTIFY);
 589                         break;
 590                 case Opt_inline_data:
 591                         set_opt(sbi, INLINE_DATA);
 592                         break;
 593                 case Opt_inline_dentry:
 594                         set_opt(sbi, INLINE_DENTRY);
 595                         break;
 596                 case Opt_noinline_dentry:
 597                         clear_opt(sbi, INLINE_DENTRY);
 598                         break;
 599                 case Opt_flush_merge:
 600                         set_opt(sbi, FLUSH_MERGE);
 601                         break;
 602                 case Opt_noflush_merge:
 603                         clear_opt(sbi, FLUSH_MERGE);
 604                         break;
 605                 case Opt_nobarrier:
 606                         set_opt(sbi, NOBARRIER);
 607                         break;
 608                 case Opt_fastboot:
 609                         set_opt(sbi, FASTBOOT);
 610                         break;
 611                 case Opt_extent_cache:
 612                         set_opt(sbi, EXTENT_CACHE);
 613                         break;
 614                 case Opt_noextent_cache:
 615                         clear_opt(sbi, EXTENT_CACHE);
 616                         break;
 617                 case Opt_noinline_data:
 618                         clear_opt(sbi, INLINE_DATA);
 619                         break;
 620                 case Opt_data_flush:
 621                         set_opt(sbi, DATA_FLUSH);
 622                         break;
 623                 case Opt_reserve_root:
 624                         if (args->from && match_int(args, &arg))
 625                                 return -EINVAL;
 626                         if (test_opt(sbi, RESERVE_ROOT)) {
 627                                 f2fs_info(sbi, "Preserve previous reserve_root=%u",
 628                                           F2FS_OPTION(sbi).root_reserved_blocks);
 629                         } else {
 630                                 F2FS_OPTION(sbi).root_reserved_blocks = arg;
 631                                 set_opt(sbi, RESERVE_ROOT);
 632                         }
 633                         break;
 634                 case Opt_resuid:
 635                         if (args->from && match_int(args, &arg))
 636                                 return -EINVAL;
 637                         uid = make_kuid(current_user_ns(), arg);
 638                         if (!uid_valid(uid)) {
 639                                 f2fs_err(sbi, "Invalid uid value %d", arg);
 640                                 return -EINVAL;
 641                         }
 642                         F2FS_OPTION(sbi).s_resuid = uid;
 643                         break;
 644                 case Opt_resgid:
 645                         if (args->from && match_int(args, &arg))
 646                                 return -EINVAL;
 647                         gid = make_kgid(current_user_ns(), arg);
 648                         if (!gid_valid(gid)) {
 649                                 f2fs_err(sbi, "Invalid gid value %d", arg);
 650                                 return -EINVAL;
 651                         }
 652                         F2FS_OPTION(sbi).s_resgid = gid;
 653                         break;
 654                 case Opt_mode:
 655                         name = match_strdup(&args[0]);
 656
 657                         if (!name)
 658                                 return -ENOMEM;
 659                         if (!strcmp(name, "adaptive")) {
 660                                 if (f2fs_sb_has_blkzoned(sbi)) {
 661                                         f2fs_warn(sbi, "adaptive mode is not allowed with zoned block device feature");
 662                                         kfree(name);
 663                                         return -EINVAL;
 664                                 }
 665                                 F2FS_OPTION(sbi).fs_mode = FS_MODE_ADAPTIVE;
 666                         } else if (!strcmp(name, "lfs")) {
 667                                 F2FS_OPTION(sbi).fs_mode = FS_MODE_LFS;
 668                         } else {
 669                                 kfree(name);
 670                                 return -EINVAL;
 671                         }
 672                         kfree(name);
 673                         break;
 674                 case Opt_io_size_bits:
 675                         if (args->from && match_int(args, &arg))
 676                                 return -EINVAL;
 677                         if (arg <= 0 || arg > __ilog2_u32(BIO_MAX_PAGES)) {
 678                                 f2fs_warn(sbi, "Not support %d, larger than %d",
 679                                           1 << arg, BIO_MAX_PAGES);
 680                                 return -EINVAL;
 681                         }
 682                         F2FS_OPTION(sbi).write_io_size_bits = arg;
 683                         break;
 684 #ifdef CONFIG_F2FS_FAULT_INJECTION
 685                 case Opt_fault_injection:
 686                         if (args->from && match_int(args, &arg))
 687                                 return -EINVAL;
 688                         f2fs_build_fault_attr(sbi, arg, F2FS_ALL_FAULT_TYPE);
 689                         set_opt(sbi, FAULT_INJECTION);
 690                         break;
 691
 692                 case Opt_fault_type:
 693                         if (args->from && match_int(args, &arg))
 694                                 return -EINVAL;
 695                         f2fs_build_fault_attr(sbi, 0, arg);
 696                         set_opt(sbi, FAULT_INJECTION);
 697                         break;
 698 #else
 699                 case Opt_fault_injection:
 700                         f2fs_info(sbi, "fault_injection options not supported");
 701                         break;
 702
 703                 case Opt_fault_type:
 704                         f2fs_info(sbi, "fault_type options not supported");
 705                         break;
 706 #endif
 707                 case Opt_lazytime:
 708                         sb->s_flags |= SB_LAZYTIME;
 709                         break;
 710                 case Opt_nolazytime:
 711                         sb->s_flags &= ~SB_LAZYTIME;
 712                         break;
 713 #ifdef CONFIG_QUOTA
 714                 case Opt_quota:
 715                 case Opt_usrquota:
 716                         set_opt(sbi, USRQUOTA);
 717                         break;
 718                 case Opt_grpquota:
 719                         set_opt(sbi, GRPQUOTA);
 720                         break;
 721                 case Opt_prjquota:
 722                         set_opt(sbi, PRJQUOTA);
 723                         break;
 724                 case Opt_usrjquota:
 725                         ret = f2fs_set_qf_name(sb, USRQUOTA, &args[0]);
 726                         if (ret)
 727                                 return ret;
 728                         break;
 729                 case Opt_grpjquota:
 730                         ret = f2fs_set_qf_name(sb, GRPQUOTA, &args[0]);
 731                         if (ret)
 732                                 return ret;
 733                         break;
 734                 case Opt_prjjquota:
 735                         ret = f2fs_set_qf_name(sb, PRJQUOTA, &args[0]);
 736                         if (ret)
 737                                 return ret;
 738                         break;
 739                 case Opt_offusrjquota:
 740                         ret = f2fs_clear_qf_name(sb, USRQUOTA);
 741                         if (ret)
 742                                 return ret;
 743                         break;
 744                 case Opt_offgrpjquota:
 745                         ret = f2fs_clear_qf_name(sb, GRPQUOTA);
 746                         if (ret)
 747                                 return ret;
 748                         break;
 749                 case Opt_offprjjquota:
 750                         ret = f2fs_clear_qf_name(sb, PRJQUOTA);
 751                         if (ret)
 752                                 return ret;
 753                         break;
 754                 case Opt_jqfmt_vfsold:
 755                         F2FS_OPTION(sbi).s_jquota_fmt = QFMT_VFS_OLD;
 756                         break;
 757                 case Opt_jqfmt_vfsv0:
 758                         F2FS_OPTION(sbi).s_jquota_fmt = QFMT_VFS_V0;
 759                         break;
 760                 case Opt_jqfmt_vfsv1:
 761                         F2FS_OPTION(sbi).s_jquota_fmt = QFMT_VFS_V1;
 762                         break;
 763                 case Opt_noquota:
 764                         clear_opt(sbi, QUOTA);
 765                         clear_opt(sbi, USRQUOTA);
 766                         clear_opt(sbi, GRPQUOTA);
 767                         clear_opt(sbi, PRJQUOTA);
 768                         break;
 769 #else
 770                 case Opt_quota:
 771                 case Opt_usrquota:
 772                 case Opt_grpquota:
 773                 case Opt_prjquota:
 774                 case Opt_usrjquota:
 775                 case Opt_grpjquota:
 776                 case Opt_prjjquota:
 777                 case Opt_offusrjquota:
 778                 case Opt_offgrpjquota:
 779                 case Opt_offprjjquota:
 780                 case Opt_jqfmt_vfsold:
 781                 case Opt_jqfmt_vfsv0:
 782                 case Opt_jqfmt_vfsv1:
 783                 case Opt_noquota:
 784                         f2fs_info(sbi, "quota operations not supported");
 785                         break;
 786 #endif
 787                 case Opt_whint:
 788                         name = match_strdup(&args[0]);
 789                         if (!name)
 790                                 return -ENOMEM;
 791                         if (!strcmp(name, "user-based")) {
 792                                 F2FS_OPTION(sbi).whint_mode = WHINT_MODE_USER;
 793                         } else if (!strcmp(name, "off")) {
 794                                 F2FS_OPTION(sbi).whint_mode = WHINT_MODE_OFF;
 795                         } else if (!strcmp(name, "fs-based")) {
 796                                 F2FS_OPTION(sbi).whint_mode = WHINT_MODE_FS;
 797                         } else {
 798                                 kfree(name);
 799                                 return -EINVAL;
 800                         }
 801                         kfree(name);
 802                         break;
 803                 case Opt_alloc:
 804                         name = match_strdup(&args[0]);
 805                         if (!name)
 806                                 return -ENOMEM;
 807
 808                         if (!strcmp(name, "default")) {
 809                                 F2FS_OPTION(sbi).alloc_mode = ALLOC_MODE_DEFAULT;
 810                         } else if (!strcmp(name, "reuse")) {
 811                                 F2FS_OPTION(sbi).alloc_mode = ALLOC_MODE_REUSE;
 812                         } else {
 813                                 kfree(name);
 814                                 return -EINVAL;
 815                         }
 816                         kfree(name);
 817                         break;
 818                 case Opt_fsync:
 819                         name = match_strdup(&args[0]);
 820                         if (!name)
 821                                 return -ENOMEM;
 822                         if (!strcmp(name, "posix")) {
 823                                 F2FS_OPTION(sbi).fsync_mode = FSYNC_MODE_POSIX;
 824                         } else if (!strcmp(name, "strict")) {
 825                                 F2FS_OPTION(sbi).fsync_mode = FSYNC_MODE_STRICT;
 826                         } else if (!strcmp(name, "nobarrier")) {
 827                                 F2FS_OPTION(sbi).fsync_mode =
 828                                                         FSYNC_MODE_NOBARRIER;
 829                         } else {
 830                                 kfree(name);
 831                                 return -EINVAL;
 832                         }
 833                         kfree(name);
 834                         break;
 835                 case Opt_test_dummy_encryption:
 836                         ret = f2fs_set_test_dummy_encryption(sb, p, &args[0],
 837                                                              is_remount);
 838                         if (ret)
 839                                 return ret;
 840                         break;
 841                 case Opt_inlinecrypt:
 842 #ifdef CONFIG_FS_ENCRYPTION_INLINE_CRYPT
 843                         sb->s_flags |= SB_INLINECRYPT;
 844 #else
 845                         f2fs_info(sbi, "inline encryption not supported");
 846 #endif
 847                         break;
 848                 case Opt_checkpoint_disable_cap_perc:
 849                         if (args->from && match_int(args, &arg))
 850                                 return -EINVAL;
 851                         if (arg < 0 || arg > 100)
 852                                 return -EINVAL;
 853                         F2FS_OPTION(sbi).unusable_cap_perc = arg;
 854                         set_opt(sbi, DISABLE_CHECKPOINT);
 855                         break;
 856                 case Opt_checkpoint_disable_cap:
 857                         if (args->from && match_int(args, &arg))
 858                                 return -EINVAL;
 859                         F2FS_OPTION(sbi).unusable_cap = arg;
 860                         set_opt(sbi, DISABLE_CHECKPOINT);
 861                         break;
 862                 case Opt_checkpoint_disable:
 863                         set_opt(sbi, DISABLE_CHECKPOINT);
 864                         break;
 865                 case Opt_checkpoint_enable:
 866                         clear_opt(sbi, DISABLE_CHECKPOINT);
 867                         break;
 868 #ifdef CONFIG_F2FS_FS_COMPRESSION
 869                 case Opt_compress_algorithm:
 870                         if (!f2fs_sb_has_compression(sbi)) {
 871                                 f2fs_err(sbi, "Compression feature if off");
 872                                 return -EINVAL;
 873                         }
 874                         name = match_strdup(&args[0]);
 875                         if (!name)
 876                                 return -ENOMEM;
 877                         if (!strcmp(name, "lzo")) {
 878                                 F2FS_OPTION(sbi).compress_algorithm =
 879                                                                 COMPRESS_LZO;
 880                         } else if (!strcmp(name, "lz4")) {
 881                                 F2FS_OPTION(sbi).compress_algorithm =
 882                                                                 COMPRESS_LZ4;
 883                         } else if (!strcmp(name, "zstd")) {
 884                                 F2FS_OPTION(sbi).compress_algorithm =
 885                                                                 COMPRESS_ZSTD;
 886                         } else if (!strcmp(name, "lzo-rle")) {
 887                                 F2FS_OPTION(sbi).compress_algorithm =
 888                                                                 COMPRESS_LZORLE;
 889                         } else {
 890                                 kfree(name);
 891                                 return -EINVAL;
 892                         }
 893                         kfree(name);
 894                         break;
 895                 case Opt_compress_log_size:
 896                         if (!f2fs_sb_has_compression(sbi)) {
 897                                 f2fs_err(sbi, "Compression feature is off");
 898                                 return -EINVAL;
 899                         }
 900                         if (args->from && match_int(args, &arg))
 901                                 return -EINVAL;
 902                         if (arg < MIN_COMPRESS_LOG_SIZE ||
 903                                 arg > MAX_COMPRESS_LOG_SIZE) {
 904                                 f2fs_err(sbi,
 905                                         "Compress cluster log size is out of range");
 906                                 return -EINVAL;
 907                         }
 908                         F2FS_OPTION(sbi).compress_log_size = arg;
 909                         break;
 910                 case Opt_compress_extension:
 911                         if (!f2fs_sb_has_compression(sbi)) {
 912                                 f2fs_err(sbi, "Compression feature is off");
 913                                 return -EINVAL;
 914                         }
 915                         name = match_strdup(&args[0]);
 916                         if (!name)
 917                                 return -ENOMEM;
 918
 919                         ext = F2FS_OPTION(sbi).extensions;
 920                         ext_cnt = F2FS_OPTION(sbi).compress_ext_cnt;
 921
 922                         if (strlen(name) >= F2FS_EXTENSION_LEN ||
 923                                 ext_cnt >= COMPRESS_EXT_NUM) {
 924                                 f2fs_err(sbi,
 925                                         "invalid extension length/number");
 926                                 kfree(name);
 927                                 return -EINVAL;
 928                         }
 929
 930                         strcpy(ext[ext_cnt], name);
 931                         F2FS_OPTION(sbi).compress_ext_cnt++;
 932                         kfree(name);
 933                         break;
 934 #else
 935                 case Opt_compress_algorithm:
 936                 case Opt_compress_log_size:
 937                 case Opt_compress_extension:
 938                         f2fs_info(sbi, "compression options not supported");
 939                         break;
 940 #endif
 941                 default:
 942                         f2fs_err(sbi, "Unrecognized mount option \"%s\" or missing value",
 943                                  p);
 944                         return -EINVAL;
 945                 }
 946         }
 947 #ifdef CONFIG_QUOTA
 948         if (f2fs_check_quota_options(sbi))
 949                 return -EINVAL;
 950 #else
 951         if (f2fs_sb_has_quota_ino(sbi) && !f2fs_readonly(sbi->sb)) {
 952                 f2fs_info(sbi, "Filesystem with quota feature cannot be mounted RDWR without CONFIG_QUOTA");
 953                 return -EINVAL;
 954         }
 955         if (f2fs_sb_has_project_quota(sbi) && !f2fs_readonly(sbi->sb)) {
 956                 f2fs_err(sbi, "Filesystem with project quota feature cannot be mounted RDWR without CONFIG_QUOTA");
 957                 return -EINVAL;
 958         }
 959 #endif
 960 #ifndef CONFIG_UNICODE
 961         if (f2fs_sb_has_casefold(sbi)) {
 962                 f2fs_err(sbi,
 963                         "Filesystem with casefold feature cannot be mounted without CONFIG_UNICODE");
 964                 return -EINVAL;
 965         }
 966 #endif
 967
 968         if (F2FS_IO_SIZE_BITS(sbi) && !f2fs_lfs_mode(sbi)) {
 969                 f2fs_err(sbi, "Should set mode=lfs with %uKB-sized IO",
 970                          F2FS_IO_SIZE_KB(sbi));
 971                 return -EINVAL;
 972         }
 973
 974         if (test_opt(sbi, INLINE_XATTR_SIZE)) {
 975                 int min_size, max_size;
 976
 977                 if (!f2fs_sb_has_extra_attr(sbi) ||
 978                         !f2fs_sb_has_flexible_inline_xattr(sbi)) {
 979                         f2fs_err(sbi, "extra_attr or flexible_inline_xattr feature is off");
 980                         return -EINVAL;
 981                 }
 982                 if (!test_opt(sbi, INLINE_XATTR)) {
 983                         f2fs_err(sbi, "inline_xattr_size option should be set with inline_xattr option");
 984                         return -EINVAL;
 985                 }
 986
 987                 min_size = sizeof(struct f2fs_xattr_header) / sizeof(__le32);
 988                 max_size = MAX_INLINE_XATTR_SIZE;
 989
 990                 if (F2FS_OPTION(sbi).inline_xattr_size < min_size ||
 991                                 F2FS_OPTION(sbi).inline_xattr_size > max_size) {
 992                         f2fs_err(sbi, "inline xattr size is out of range: %d ~ %d",
 993                                  min_size, max_size);
 994                         return -EINVAL;
 995                 }
 996         }
 997
 998         if (test_opt(sbi, DISABLE_CHECKPOINT) && f2fs_lfs_mode(sbi)) {
 999                 f2fs_err(sbi, "LFS not compatible with checkpoint=disable\n");
1000                 return -EINVAL;
1001         }
1002
1003         /* Not pass down write hints if the number of active logs is lesser
1004          * than NR_CURSEG_TYPE.
1005          */
1006         if (F2FS_OPTION(sbi).active_logs != NR_CURSEG_TYPE)
1007                 F2FS_OPTION(sbi).whint_mode = WHINT_MODE_OFF;
1008         return 0;
1009 }
1010
1011 static struct inode *f2fs_alloc_inode(struct super_block *sb)
1012 {
1013         struct f2fs_inode_info *fi;
1014
1015         fi = kmem_cache_alloc(f2fs_inode_cachep, GFP_F2FS_ZERO);
1016         if (!fi)
1017                 return NULL;
1018
1019         init_once((void *) fi);
1020
1021         /* Initialize f2fs-specific inode info */
1022         atomic_set(&fi->dirty_pages, 0);
1023         init_rwsem(&fi->i_sem);
1024         spin_lock_init(&fi->i_size_lock);
1025         INIT_LIST_HEAD(&fi->dirty_list);
1026         INIT_LIST_HEAD(&fi->gdirty_list);
1027         INIT_LIST_HEAD(&fi->inmem_ilist);
1028         INIT_LIST_HEAD(&fi->inmem_pages);
1029         mutex_init(&fi->inmem_lock);
1030         init_rwsem(&fi->i_gc_rwsem[READ]);
1031         init_rwsem(&fi->i_gc_rwsem[WRITE]);
1032         init_rwsem(&fi->i_mmap_sem);
1033         init_rwsem(&fi->i_xattr_sem);
1034
1035         /* Will be used by directory only */
1036         fi->i_dir_level = F2FS_SB(sb)->dir_level;
1037
1038         fi->ra_offset = -1;
1039
1040         return &fi->vfs_inode;
1041 }
1042
1043 static int f2fs_drop_inode(struct inode *inode)
1044 {
1045         struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
1046         int ret;
1047
1048         /*
1049          * during filesystem shutdown, if checkpoint is disabled,
1050          * drop useless meta/node dirty pages.
1051          */
1052         if (unlikely(is_sbi_flag_set(sbi, SBI_CP_DISABLED))) {
1053                 if (inode->i_ino == F2FS_NODE_INO(sbi) ||
1054                         inode->i_ino == F2FS_META_INO(sbi)) {
1055                         trace_f2fs_drop_inode(inode, 1);
1056                         return 1;
1057                 }
1058         }
1059
1060         /*
1061          * This is to avoid a deadlock condition like below.
1062          * writeback_single_inode(inode)
1063          *  - f2fs_write_data_page
1064          *    - f2fs_gc -> iput -> evict
1065          *       - inode_wait_for_writeback(inode)
1066          */
1067         if ((!inode_unhashed(inode) && inode->i_state & I_SYNC)) {
1068                 if (!inode->i_nlink && !is_bad_inode(inode)) {
1069                         /* to avoid evict_inode call simultaneously */
1070                         atomic_inc(&inode->i_count);
1071                         spin_unlock(&inode->i_lock);
1072
1073                         /* some remained atomic pages should discarded */
1074                         if (f2fs_is_atomic_file(inode))
1075                                 f2fs_drop_inmem_pages(inode);
1076
1077                         /* should remain fi->extent_tree for writepage */
1078                         f2fs_destroy_extent_node(inode);
1079
1080                         sb_start_intwrite(inode->i_sb);
1081                         f2fs_i_size_write(inode, 0);
1082
1083                         f2fs_submit_merged_write_cond(F2FS_I_SB(inode),
1084                                         inode, NULL, 0, DATA);
1085                         truncate_inode_pages_final(inode->i_mapping);
1086
1087                         if (F2FS_HAS_BLOCKS(inode))
1088                                 f2fs_truncate(inode);
1089
1090                         sb_end_intwrite(inode->i_sb);
1091
1092                         spin_lock(&inode->i_lock);
1093                         atomic_dec(&inode->i_count);
1094                 }
1095                 trace_f2fs_drop_inode(inode, 0);
1096                 return 0;
1097         }
1098         ret = generic_drop_inode(inode);
1099         if (!ret)
1100                 ret = fscrypt_drop_inode(inode);
1101         trace_f2fs_drop_inode(inode, ret);
1102         return ret;
1103 }
1104
1105 int f2fs_inode_dirtied(struct inode *inode, bool sync)
1106 {
1107         struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
1108         int ret = 0;
1109
1110         spin_lock(&sbi->inode_lock[DIRTY_META]);
1111         if (is_inode_flag_set(inode, FI_DIRTY_INODE)) {
1112                 ret = 1;
1113         } else {
1114                 set_inode_flag(inode, FI_DIRTY_INODE);
1115                 stat_inc_dirty_inode(sbi, DIRTY_META);
1116         }
1117         if (sync && list_empty(&F2FS_I(inode)->gdirty_list)) {
1118                 list_add_tail(&F2FS_I(inode)->gdirty_list,
1119                                 &sbi->inode_list[DIRTY_META]);
1120                 inc_page_count(sbi, F2FS_DIRTY_IMETA);
1121         }
1122         spin_unlock(&sbi->inode_lock[DIRTY_META]);
1123         return ret;
1124 }
1125
1126 void f2fs_inode_synced(struct inode *inode)
1127 {
1128         struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
1129
1130         spin_lock(&sbi->inode_lock[DIRTY_META]);
1131         if (!is_inode_flag_set(inode, FI_DIRTY_INODE)) {
1132                 spin_unlock(&sbi->inode_lock[DIRTY_META]);
1133                 return;
1134         }
1135         if (!list_empty(&F2FS_I(inode)->gdirty_list)) {
1136                 list_del_init(&F2FS_I(inode)->gdirty_list);
1137                 dec_page_count(sbi, F2FS_DIRTY_IMETA);
1138         }
1139         clear_inode_flag(inode, FI_DIRTY_INODE);
1140         clear_inode_flag(inode, FI_AUTO_RECOVER);
1141         stat_dec_dirty_inode(F2FS_I_SB(inode), DIRTY_META);
1142         spin_unlock(&sbi->inode_lock[DIRTY_META]);
1143 }
1144
1145 /*
1146  * f2fs_dirty_inode() is called from __mark_inode_dirty()
1147  *
1148  * We should call set_dirty_inode to write the dirty inode through write_inode.
1149  */
1150 static void f2fs_dirty_inode(struct inode *inode, int flags)
1151 {
1152         struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
1153
1154         if (inode->i_ino == F2FS_NODE_INO(sbi) ||
1155                         inode->i_ino == F2FS_META_INO(sbi))
1156                 return;
1157
1158         if (flags == I_DIRTY_TIME)
1159                 return;
1160
1161         if (is_inode_flag_set(inode, FI_AUTO_RECOVER))
1162                 clear_inode_flag(inode, FI_AUTO_RECOVER);
1163
1164         f2fs_inode_dirtied(inode, false);
1165 }
1166
1167 static void f2fs_free_inode(struct inode *inode)
1168 {
1169         fscrypt_free_inode(inode);
1170         kmem_cache_free(f2fs_inode_cachep, F2FS_I(inode));
1171 }
1172
1173 static void destroy_percpu_info(struct f2fs_sb_info *sbi)
1174 {
1175         percpu_counter_destroy(&sbi->alloc_valid_block_count);
1176         percpu_counter_destroy(&sbi->total_valid_inode_count);
1177 }
1178
1179 static void destroy_device_list(struct f2fs_sb_info *sbi)
1180 {
1181         int i;
1182
1183         for (i = 0; i < sbi->s_ndevs; i++) {
1184                 blkdev_put(FDEV(i).bdev, FMODE_EXCL);
1185 #ifdef CONFIG_BLK_DEV_ZONED
1186                 kvfree(FDEV(i).blkz_seq);
1187 #endif
1188         }
1189         kvfree(sbi->devs);
1190 }
1191
1192 static void f2fs_put_super(struct super_block *sb)
1193 {
1194         struct f2fs_sb_info *sbi = F2FS_SB(sb);
1195         int i;
1196         bool dropped;
1197
1198         /* unregister procfs/sysfs entries in advance to avoid race case */
1199         f2fs_unregister_sysfs(sbi);
1200
1201         f2fs_quota_off_umount(sb);
1202
1203         /* prevent remaining shrinker jobs */
1204         mutex_lock(&sbi->umount_mutex);
1205
1206         /*
1207          * We don't need to do checkpoint when superblock is clean.
1208          * But, the previous checkpoint was not done by umount, it needs to do
1209          * clean checkpoint again.
1210          */
1211         if ((is_sbi_flag_set(sbi, SBI_IS_DIRTY) ||
1212                         !is_set_ckpt_flags(sbi, CP_UMOUNT_FLAG))) {
1213                 struct cp_control cpc = {
1214                         .reason = CP_UMOUNT,
1215                 };
1216                 f2fs_write_checkpoint(sbi, &cpc);
1217         }
1218
1219         /* be sure to wait for any on-going discard commands */
1220         dropped = f2fs_issue_discard_timeout(sbi);
1221
1222         if ((f2fs_hw_support_discard(sbi) || f2fs_hw_should_discard(sbi)) &&
1223                                         !sbi->discard_blks && !dropped) {
1224                 struct cp_control cpc = {
1225                         .reason = CP_UMOUNT | CP_TRIMMED,
1226                 };
1227                 f2fs_write_checkpoint(sbi, &cpc);
1228         }
1229
1230         /*
1231          * normally superblock is clean, so we need to release this.
1232          * In addition, EIO will skip do checkpoint, we need this as well.
1233          */
1234         f2fs_release_ino_entry(sbi, true);
1235
1236         f2fs_leave_shrinker(sbi);
1237         mutex_unlock(&sbi->umount_mutex);
1238
1239         /* our cp_error case, we can wait for any writeback page */
1240         f2fs_flush_merged_writes(sbi);
1241
1242         f2fs_wait_on_all_pages(sbi, F2FS_WB_CP_DATA);
1243
1244         f2fs_bug_on(sbi, sbi->fsync_node_num);
1245
1246         iput(sbi->node_inode);
1247         sbi->node_inode = NULL;
1248
1249         iput(sbi->meta_inode);
1250         sbi->meta_inode = NULL;
1251
1252         /*
1253          * iput() can update stat information, if f2fs_write_checkpoint()
1254          * above failed with error.
1255          */
1256         f2fs_destroy_stats(sbi);
1257
1258         /* destroy f2fs internal modules */
1259         f2fs_destroy_node_manager(sbi);
1260         f2fs_destroy_segment_manager(sbi);
1261
1262         f2fs_destroy_post_read_wq(sbi);
1263
1264         kvfree(sbi->ckpt);
1265
1266         sb->s_fs_info = NULL;
1267         if (sbi->s_chksum_driver)
1268                 crypto_free_shash(sbi->s_chksum_driver);
1269         kfree(sbi->raw_super);
1270
1271         destroy_device_list(sbi);
1272         f2fs_destroy_xattr_caches(sbi);
1273         mempool_destroy(sbi->write_io_dummy);
1274 #ifdef CONFIG_QUOTA
1275         for (i = 0; i < MAXQUOTAS; i++)
1276                 kfree(F2FS_OPTION(sbi).s_qf_names[i]);
1277 #endif
1278         fscrypt_free_dummy_context(&F2FS_OPTION(sbi).dummy_enc_ctx);
1279         destroy_percpu_info(sbi);
1280         for (i = 0; i < NR_PAGE_TYPE; i++)
1281                 kvfree(sbi->write_io[i]);
1282 #ifdef CONFIG_UNICODE
1283         utf8_unload(sbi->s_encoding);
1284 #endif
1285         kfree(sbi);
1286 }
1287
1288 int f2fs_sync_fs(struct super_block *sb, int sync)
1289 {
1290         struct f2fs_sb_info *sbi = F2FS_SB(sb);
1291         int err = 0;
1292
1293         if (unlikely(f2fs_cp_error(sbi)))
1294                 return 0;
1295         if (unlikely(is_sbi_flag_set(sbi, SBI_CP_DISABLED)))
1296                 return 0;
1297
1298         trace_f2fs_sync_fs(sb, sync);
1299
1300         if (unlikely(is_sbi_flag_set(sbi, SBI_POR_DOING)))
1301                 return -EAGAIN;
1302
1303         if (sync) {
1304                 struct cp_control cpc;
1305
1306                 cpc.reason = __get_cp_reason(sbi);
1307
1308                 down_write(&sbi->gc_lock);
1309                 err = f2fs_write_checkpoint(sbi, &cpc);
1310                 up_write(&sbi->gc_lock);
1311         }
1312         f2fs_trace_ios(NULL, 1);
1313
1314         return err;
1315 }
1316
1317 static int f2fs_freeze(struct super_block *sb)
1318 {
1319         if (f2fs_readonly(sb))
1320                 return 0;
1321
1322         /* IO error happened before */
1323         if (unlikely(f2fs_cp_error(F2FS_SB(sb))))
1324                 return -EIO;
1325
1326         /* must be clean, since sync_filesystem() was already called */
1327         if (is_sbi_flag_set(F2FS_SB(sb), SBI_IS_DIRTY))
1328                 return -EINVAL;
1329         return 0;
1330 }
1331
1332 static int f2fs_unfreeze(struct super_block *sb)
1333 {
1334         return 0;
1335 }
1336
1337 #ifdef CONFIG_QUOTA
1338 static int f2fs_statfs_project(struct super_block *sb,
1339                                 kprojid_t projid, struct kstatfs *buf)
1340 {
1341         struct kqid qid;
1342         struct dquot *dquot;
1343         u64 limit;
1344         u64 curblock;
1345
1346         qid = make_kqid_projid(projid);
1347         dquot = dqget(sb, qid);
1348         if (IS_ERR(dquot))
1349                 return PTR_ERR(dquot);
1350         spin_lock(&dquot->dq_dqb_lock);
1351
1352         limit = min_not_zero(dquot->dq_dqb.dqb_bsoftlimit,
1353                                         dquot->dq_dqb.dqb_bhardlimit);
1354         if (limit)
1355                 limit >>= sb->s_blocksize_bits;
1356
1357         if (limit && buf->f_blocks > limit) {
1358                 curblock = (dquot->dq_dqb.dqb_curspace +
1359                             dquot->dq_dqb.dqb_rsvspace) >> sb->s_blocksize_bits;
1360                 buf->f_blocks = limit;
1361                 buf->f_bfree = buf->f_bavail =
1362                         (buf->f_blocks > curblock) ?
1363                          (buf->f_blocks - curblock) : 0;
1364         }
1365
1366         limit = min_not_zero(dquot->dq_dqb.dqb_isoftlimit,
1367                                         dquot->dq_dqb.dqb_ihardlimit);
1368
1369         if (limit && buf->f_files > limit) {
1370                 buf->f_files = limit;
1371                 buf->f_ffree =
1372                         (buf->f_files > dquot->dq_dqb.dqb_curinodes) ?
1373                          (buf->f_files - dquot->dq_dqb.dqb_curinodes) : 0;
1374         }
1375
1376         spin_unlock(&dquot->dq_dqb_lock);
1377         dqput(dquot);
1378         return 0;
1379 }
1380 #endif
1381
1382 static int f2fs_statfs(struct dentry *dentry, struct kstatfs *buf)
1383 {
1384         struct super_block *sb = dentry->d_sb;
1385         struct f2fs_sb_info *sbi = F2FS_SB(sb);
1386         u64 id = huge_encode_dev(sb->s_bdev->bd_dev);
1387         block_t total_count, user_block_count, start_count;
1388         u64 avail_node_count;
1389
1390         total_count = le64_to_cpu(sbi->raw_super->block_count);
1391         user_block_count = sbi->user_block_count;
1392         start_count = le32_to_cpu(sbi->raw_super->segment0_blkaddr);
1393         buf->f_type = F2FS_SUPER_MAGIC;
1394         buf->f_bsize = sbi->blocksize;
1395
1396         buf->f_blocks = total_count - start_count;
1397         buf->f_bfree = user_block_count - valid_user_blocks(sbi) -
1398                                                 sbi->current_reserved_blocks;
1399
1400         spin_lock(&sbi->stat_lock);
1401         if (unlikely(buf->f_bfree <= sbi->unusable_block_count))
1402                 buf->f_bfree = 0;
1403         else
1404                 buf->f_bfree -= sbi->unusable_block_count;
1405         spin_unlock(&sbi->stat_lock);
1406
1407         if (buf->f_bfree > F2FS_OPTION(sbi).root_reserved_blocks)
1408                 buf->f_bavail = buf->f_bfree -
1409                                 F2FS_OPTION(sbi).root_reserved_blocks;
1410         else
1411                 buf->f_bavail = 0;
1412
1413         avail_node_count = sbi->total_node_count - F2FS_RESERVED_NODE_NUM;
1414
1415         if (avail_node_count > user_block_count) {
1416                 buf->f_files = user_block_count;
1417                 buf->f_ffree = buf->f_bavail;
1418         } else {
1419                 buf->f_files = avail_node_count;
1420                 buf->f_ffree = min(avail_node_count - valid_node_count(sbi),
1421                                         buf->f_bavail);
1422         }
1423
1424         buf->f_namelen = F2FS_NAME_LEN;
1425         buf->f_fsid.val[0] = (u32)id;
1426         buf->f_fsid.val[1] = (u32)(id >> 32);
1427
1428 #ifdef CONFIG_QUOTA
1429         if (is_inode_flag_set(dentry->d_inode, FI_PROJ_INHERIT) &&
1430                         sb_has_quota_limits_enabled(sb, PRJQUOTA)) {
1431                 f2fs_statfs_project(sb, F2FS_I(dentry->d_inode)->i_projid, buf);
1432         }
1433 #endif
1434         return 0;
1435 }
1436
1437 static inline void f2fs_show_quota_options(struct seq_file *seq,
1438                                            struct super_block *sb)
1439 {
1440 #ifdef CONFIG_QUOTA
1441         struct f2fs_sb_info *sbi = F2FS_SB(sb);
1442
1443         if (F2FS_OPTION(sbi).s_jquota_fmt) {
1444                 char *fmtname = "";
1445
1446                 switch (F2FS_OPTION(sbi).s_jquota_fmt) {
1447                 case QFMT_VFS_OLD:
1448                         fmtname = "vfsold";
1449                         break;
1450                 case QFMT_VFS_V0:
1451                         fmtname = "vfsv0";
1452                         break;
1453                 case QFMT_VFS_V1:
1454                         fmtname = "vfsv1";
1455                         break;
1456                 }
1457                 seq_printf(seq, ",jqfmt=%s", fmtname);
1458         }
1459
1460         if (F2FS_OPTION(sbi).s_qf_names[USRQUOTA])
1461                 seq_show_option(seq, "usrjquota",
1462                         F2FS_OPTION(sbi).s_qf_names[USRQUOTA]);
1463
1464         if (F2FS_OPTION(sbi).s_qf_names[GRPQUOTA])
1465                 seq_show_option(seq, "grpjquota",
1466                         F2FS_OPTION(sbi).s_qf_names[GRPQUOTA]);
1467
1468         if (F2FS_OPTION(sbi).s_qf_names[PRJQUOTA])
1469                 seq_show_option(seq, "prjjquota",
1470                         F2FS_OPTION(sbi).s_qf_names[PRJQUOTA]);
1471 #endif
1472 }
1473
1474 static inline void f2fs_show_compress_options(struct seq_file *seq,
1475                                                         struct super_block *sb)
1476 {
1477         struct f2fs_sb_info *sbi = F2FS_SB(sb);
1478         char *algtype = "";
1479         int i;
1480
1481         if (!f2fs_sb_has_compression(sbi))
1482                 return;
1483
1484         switch (F2FS_OPTION(sbi).compress_algorithm) {
1485         case COMPRESS_LZO:
1486                 algtype = "lzo";
1487                 break;
1488         case COMPRESS_LZ4:
1489                 algtype = "lz4";
1490                 break;
1491         case COMPRESS_ZSTD:
1492                 algtype = "zstd";
1493                 break;
1494         case COMPRESS_LZORLE:
1495                 algtype = "lzo-rle";
1496                 break;
1497         }
1498         seq_printf(seq, ",compress_algorithm=%s", algtype);
1499
1500         seq_printf(seq, ",compress_log_size=%u",
1501                         F2FS_OPTION(sbi).compress_log_size);
1502
1503         for (i = 0; i < F2FS_OPTION(sbi).compress_ext_cnt; i++) {
1504                 seq_printf(seq, ",compress_extension=%s",
1505                         F2FS_OPTION(sbi).extensions[i]);
1506         }
1507 }
1508
1509 static int f2fs_show_options(struct seq_file *seq, struct dentry *root)
1510 {
1511         struct f2fs_sb_info *sbi = F2FS_SB(root->d_sb);
1512
1513         if (F2FS_OPTION(sbi).bggc_mode == BGGC_MODE_SYNC)
1514                 seq_printf(seq, ",background_gc=%s", "sync");
1515         else if (F2FS_OPTION(sbi).bggc_mode == BGGC_MODE_ON)
1516                 seq_printf(seq, ",background_gc=%s", "on");
1517         else if (F2FS_OPTION(sbi).bggc_mode == BGGC_MODE_OFF)
1518                 seq_printf(seq, ",background_gc=%s", "off");
1519
1520         if (test_opt(sbi, DISABLE_ROLL_FORWARD))
1521                 seq_puts(seq, ",disable_roll_forward");
1522         if (test_opt(sbi, NORECOVERY))
1523                 seq_puts(seq, ",norecovery");
1524         if (test_opt(sbi, DISCARD))
1525                 seq_puts(seq, ",discard");
1526         else
1527                 seq_puts(seq, ",nodiscard");
1528         if (test_opt(sbi, NOHEAP))
1529                 seq_puts(seq, ",no_heap");
1530         else
1531                 seq_puts(seq, ",heap");
1532 #ifdef CONFIG_F2FS_FS_XATTR
1533         if (test_opt(sbi, XATTR_USER))
1534                 seq_puts(seq, ",user_xattr");
1535         else
1536                 seq_puts(seq, ",nouser_xattr");
1537         if (test_opt(sbi, INLINE_XATTR))
1538                 seq_puts(seq, ",inline_xattr");
1539         else
1540                 seq_puts(seq, ",noinline_xattr");
1541         if (test_opt(sbi, INLINE_XATTR_SIZE))
1542                 seq_printf(seq, ",inline_xattr_size=%u",
1543                                         F2FS_OPTION(sbi).inline_xattr_size);
1544 #endif
1545 #ifdef CONFIG_F2FS_FS_POSIX_ACL
1546         if (test_opt(sbi, POSIX_ACL))
1547                 seq_puts(seq, ",acl");
1548         else
1549                 seq_puts(seq, ",noacl");
1550 #endif
1551         if (test_opt(sbi, DISABLE_EXT_IDENTIFY))
1552                 seq_puts(seq, ",disable_ext_identify");
1553         if (test_opt(sbi, INLINE_DATA))
1554                 seq_puts(seq, ",inline_data");
1555         else
1556                 seq_puts(seq, ",noinline_data");
1557         if (test_opt(sbi, INLINE_DENTRY))
1558                 seq_puts(seq, ",inline_dentry");
1559         else
1560                 seq_puts(seq, ",noinline_dentry");
1561         if (!f2fs_readonly(sbi->sb) && test_opt(sbi, FLUSH_MERGE))
1562                 seq_puts(seq, ",flush_merge");
1563         if (test_opt(sbi, NOBARRIER))
1564                 seq_puts(seq, ",nobarrier");
1565         if (test_opt(sbi, FASTBOOT))
1566                 seq_puts(seq, ",fastboot");
1567         if (test_opt(sbi, EXTENT_CACHE))
1568                 seq_puts(seq, ",extent_cache");
1569         else
1570                 seq_puts(seq, ",noextent_cache");
1571         if (test_opt(sbi, DATA_FLUSH))
1572                 seq_puts(seq, ",data_flush");
1573
1574         seq_puts(seq, ",mode=");
1575         if (F2FS_OPTION(sbi).fs_mode == FS_MODE_ADAPTIVE)
1576                 seq_puts(seq, "adaptive");
1577         else if (F2FS_OPTION(sbi).fs_mode == FS_MODE_LFS)
1578                 seq_puts(seq, "lfs");
1579         seq_printf(seq, ",active_logs=%u", F2FS_OPTION(sbi).active_logs);
1580         if (test_opt(sbi, RESERVE_ROOT))
1581                 seq_printf(seq, ",reserve_root=%u,resuid=%u,resgid=%u",
1582                                 F2FS_OPTION(sbi).root_reserved_blocks,
1583                                 from_kuid_munged(&init_user_ns,
1584                                         F2FS_OPTION(sbi).s_resuid),
1585                                 from_kgid_munged(&init_user_ns,
1586                                         F2FS_OPTION(sbi).s_resgid));
1587         if (F2FS_IO_SIZE_BITS(sbi))
1588                 seq_printf(seq, ",io_bits=%u",
1589                                 F2FS_OPTION(sbi).write_io_size_bits);
1590 #ifdef CONFIG_F2FS_FAULT_INJECTION
1591         if (test_opt(sbi, FAULT_INJECTION)) {
1592                 seq_printf(seq, ",fault_injection=%u",
1593                                 F2FS_OPTION(sbi).fault_info.inject_rate);
1594                 seq_printf(seq, ",fault_type=%u",
1595                                 F2FS_OPTION(sbi).fault_info.inject_type);
1596         }
1597 #endif
1598 #ifdef CONFIG_QUOTA
1599         if (test_opt(sbi, QUOTA))
1600                 seq_puts(seq, ",quota");
1601         if (test_opt(sbi, USRQUOTA))
1602                 seq_puts(seq, ",usrquota");
1603         if (test_opt(sbi, GRPQUOTA))
1604                 seq_puts(seq, ",grpquota");
1605         if (test_opt(sbi, PRJQUOTA))
1606                 seq_puts(seq, ",prjquota");
1607 #endif
1608         f2fs_show_quota_options(seq, sbi->sb);
1609         if (F2FS_OPTION(sbi).whint_mode == WHINT_MODE_USER)
1610                 seq_printf(seq, ",whint_mode=%s", "user-based");
1611         else if (F2FS_OPTION(sbi).whint_mode == WHINT_MODE_FS)
1612                 seq_printf(seq, ",whint_mode=%s", "fs-based");
1613
1614         fscrypt_show_test_dummy_encryption(seq, ',', sbi->sb);
1615
1616         if (sbi->sb->s_flags & SB_INLINECRYPT)
1617                 seq_puts(seq, ",inlinecrypt");
1618
1619         if (F2FS_OPTION(sbi).alloc_mode == ALLOC_MODE_DEFAULT)
1620                 seq_printf(seq, ",alloc_mode=%s", "default");
1621         else if (F2FS_OPTION(sbi).alloc_mode == ALLOC_MODE_REUSE)
1622                 seq_printf(seq, ",alloc_mode=%s", "reuse");
1623
1624         if (test_opt(sbi, DISABLE_CHECKPOINT))
1625                 seq_printf(seq, ",checkpoint=disable:%u",
1626                                 F2FS_OPTION(sbi).unusable_cap);
1627         if (F2FS_OPTION(sbi).fsync_mode == FSYNC_MODE_POSIX)
1628                 seq_printf(seq, ",fsync_mode=%s", "posix");
1629         else if (F2FS_OPTION(sbi).fsync_mode == FSYNC_MODE_STRICT)
1630                 seq_printf(seq, ",fsync_mode=%s", "strict");
1631         else if (F2FS_OPTION(sbi).fsync_mode == FSYNC_MODE_NOBARRIER)
1632                 seq_printf(seq, ",fsync_mode=%s", "nobarrier");
1633
1634 #ifdef CONFIG_F2FS_FS_COMPRESSION
1635         f2fs_show_compress_options(seq, sbi->sb);
1636 #endif
1637         return 0;
1638 }
1639
1640 static void default_options(struct f2fs_sb_info *sbi)
1641 {
1642         /* init some FS parameters */
1643         F2FS_OPTION(sbi).active_logs = NR_CURSEG_TYPE;
1644         F2FS_OPTION(sbi).inline_xattr_size = DEFAULT_INLINE_XATTR_ADDRS;
1645         F2FS_OPTION(sbi).whint_mode = WHINT_MODE_OFF;
1646         F2FS_OPTION(sbi).alloc_mode = ALLOC_MODE_DEFAULT;
1647         F2FS_OPTION(sbi).fsync_mode = FSYNC_MODE_POSIX;
1648         F2FS_OPTION(sbi).s_resuid = make_kuid(&init_user_ns, F2FS_DEF_RESUID);
1649         F2FS_OPTION(sbi).s_resgid = make_kgid(&init_user_ns, F2FS_DEF_RESGID);
1650         F2FS_OPTION(sbi).compress_algorithm = COMPRESS_LZ4;
1651         F2FS_OPTION(sbi).compress_log_size = MIN_COMPRESS_LOG_SIZE;
1652         F2FS_OPTION(sbi).compress_ext_cnt = 0;
1653         F2FS_OPTION(sbi).bggc_mode = BGGC_MODE_ON;
1654
1655         sbi->sb->s_flags &= ~SB_INLINECRYPT;
1656
1657         set_opt(sbi, INLINE_XATTR);
1658         set_opt(sbi, INLINE_DATA);
1659         set_opt(sbi, INLINE_DENTRY);
1660         set_opt(sbi, EXTENT_CACHE);
1661         set_opt(sbi, NOHEAP);
1662         clear_opt(sbi, DISABLE_CHECKPOINT);
1663         F2FS_OPTION(sbi).unusable_cap = 0;
1664         sbi->sb->s_flags |= SB_LAZYTIME;
1665         set_opt(sbi, FLUSH_MERGE);
1666         set_opt(sbi, DISCARD);
1667         if (f2fs_sb_has_blkzoned(sbi))
1668                 F2FS_OPTION(sbi).fs_mode = FS_MODE_LFS;
1669         else
1670                 F2FS_OPTION(sbi).fs_mode = FS_MODE_ADAPTIVE;
1671
1672 #ifdef CONFIG_F2FS_FS_XATTR
1673         set_opt(sbi, XATTR_USER);
1674 #endif
1675 #ifdef CONFIG_F2FS_FS_POSIX_ACL
1676         set_opt(sbi, POSIX_ACL);
1677 #endif
1678
1679         f2fs_build_fault_attr(sbi, 0, 0);
1680 }
1681
1682 #ifdef CONFIG_QUOTA
1683 static int f2fs_enable_quotas(struct super_block *sb);
1684 #endif
1685
1686 static int f2fs_disable_checkpoint(struct f2fs_sb_info *sbi)
1687 {
1688         unsigned int s_flags = sbi->sb->s_flags;
1689         struct cp_control cpc;
1690         int err = 0;
1691         int ret;
1692         block_t unusable;
1693
1694         if (s_flags & SB_RDONLY) {
1695                 f2fs_err(sbi, "checkpoint=disable on readonly fs");
1696                 return -EINVAL;
1697         }
1698         sbi->sb->s_flags |= SB_ACTIVE;
1699
1700         f2fs_update_time(sbi, DISABLE_TIME);
1701
1702         while (!f2fs_time_over(sbi, DISABLE_TIME)) {
1703                 down_write(&sbi->gc_lock);
1704                 err = f2fs_gc(sbi, true, false, NULL_SEGNO);
1705                 if (err == -ENODATA) {
1706                         err = 0;
1707                         break;
1708                 }
1709                 if (err && err != -EAGAIN)
1710                         break;
1711         }
1712
1713         ret = sync_filesystem(sbi->sb);
1714         if (ret || err) {
1715                 err = ret ? ret: err;
1716                 goto restore_flag;
1717         }
1718
1719         unusable = f2fs_get_unusable_blocks(sbi);
1720         if (f2fs_disable_cp_again(sbi, unusable)) {
1721                 err = -EAGAIN;
1722                 goto restore_flag;
1723         }
1724
1725         down_write(&sbi->gc_lock);
1726         cpc.reason = CP_PAUSE;
1727         set_sbi_flag(sbi, SBI_CP_DISABLED);
1728         err = f2fs_write_checkpoint(sbi, &cpc);
1729         if (err)
1730                 goto out_unlock;
1731
1732         spin_lock(&sbi->stat_lock);
1733         sbi->unusable_block_count = unusable;
1734         spin_unlock(&sbi->stat_lock);
1735
1736 out_unlock:
1737         up_write(&sbi->gc_lock);
1738 restore_flag:
1739         sbi->sb->s_flags = s_flags;     /* Restore SB_RDONLY status */
1740         return err;
1741 }
1742
1743 static void f2fs_enable_checkpoint(struct f2fs_sb_info *sbi)
1744 {
1745         down_write(&sbi->gc_lock);
1746         f2fs_dirty_to_prefree(sbi);
1747
1748         clear_sbi_flag(sbi, SBI_CP_DISABLED);
1749         set_sbi_flag(sbi, SBI_IS_DIRTY);
1750         up_write(&sbi->gc_lock);
1751
1752         f2fs_sync_fs(sbi->sb, 1);
1753 }
1754
1755 static int f2fs_remount(struct super_block *sb, int *flags, char *data)
1756 {
1757         struct f2fs_sb_info *sbi = F2FS_SB(sb);
1758         struct f2fs_mount_info org_mount_opt;
1759         unsigned long old_sb_flags;
1760         int err;
1761         bool need_restart_gc = false;
1762         bool need_stop_gc = false;
1763         bool no_extent_cache = !test_opt(sbi, EXTENT_CACHE);
1764         bool disable_checkpoint = test_opt(sbi, DISABLE_CHECKPOINT);
1765         bool no_io_align = !F2FS_IO_ALIGNED(sbi);
1766         bool checkpoint_changed;
1767 #ifdef CONFIG_QUOTA
1768         int i, j;
1769 #endif
1770
1771         /*
1772          * Save the old mount options in case we
1773          * need to restore them.
1774          */
1775         org_mount_opt = sbi->mount_opt;
1776         old_sb_flags = sb->s_flags;
1777
1778 #ifdef CONFIG_QUOTA
1779         org_mount_opt.s_jquota_fmt = F2FS_OPTION(sbi).s_jquota_fmt;
1780         for (i = 0; i < MAXQUOTAS; i++) {
1781                 if (F2FS_OPTION(sbi).s_qf_names[i]) {
1782                         org_mount_opt.s_qf_names[i] =
1783                                 kstrdup(F2FS_OPTION(sbi).s_qf_names[i],
1784                                 GFP_KERNEL);
1785                         if (!org_mount_opt.s_qf_names[i]) {
1786                                 for (j = 0; j < i; j++)
1787                                         kfree(org_mount_opt.s_qf_names[j]);
1788                                 return -ENOMEM;
1789                         }
1790                 } else {
1791                         org_mount_opt.s_qf_names[i] = NULL;
1792                 }
1793         }
1794 #endif
1795
1796         /* recover superblocks we couldn't write due to previous RO mount */
1797         if (!(*flags & SB_RDONLY) && is_sbi_flag_set(sbi, SBI_NEED_SB_WRITE)) {
1798                 err = f2fs_commit_super(sbi, false);
1799                 f2fs_info(sbi, "Try to recover all the superblocks, ret: %d",
1800                           err);
1801                 if (!err)
1802                         clear_sbi_flag(sbi, SBI_NEED_SB_WRITE);
1803         }
1804
1805         default_options(sbi);
1806
1807         /* parse mount options */
1808         err = parse_options(sb, data, true);
1809         if (err)
1810                 goto restore_opts;
1811         checkpoint_changed =
1812                         disable_checkpoint != test_opt(sbi, DISABLE_CHECKPOINT);
1813
1814         /*
1815          * Previous and new state of filesystem is RO,
1816          * so skip checking GC and FLUSH_MERGE conditions.
1817          */
1818         if (f2fs_readonly(sb) && (*flags & SB_RDONLY))
1819                 goto skip;
1820
1821 #ifdef CONFIG_QUOTA
1822         if (!f2fs_readonly(sb) && (*flags & SB_RDONLY)) {
1823                 err = dquot_suspend(sb, -1);
1824                 if (err < 0)
1825                         goto restore_opts;
1826         } else if (f2fs_readonly(sb) && !(*flags & SB_RDONLY)) {
1827                 /* dquot_resume needs RW */
1828                 sb->s_flags &= ~SB_RDONLY;
1829                 if (sb_any_quota_suspended(sb)) {
1830                         dquot_resume(sb, -1);
1831                 } else if (f2fs_sb_has_quota_ino(sbi)) {
1832                         err = f2fs_enable_quotas(sb);
1833                         if (err)
1834                                 goto restore_opts;
1835                 }
1836         }
1837 #endif
1838         /* disallow enable/disable extent_cache dynamically */
1839         if (no_extent_cache == !!test_opt(sbi, EXTENT_CACHE)) {
1840                 err = -EINVAL;
1841                 f2fs_warn(sbi, "switch extent_cache option is not allowed");
1842                 goto restore_opts;
1843         }
1844
1845         if (no_io_align == !!F2FS_IO_ALIGNED(sbi)) {
1846                 err = -EINVAL;
1847                 f2fs_warn(sbi, "switch io_bits option is not allowed");
1848                 goto restore_opts;
1849         }
1850
1851         if ((*flags & SB_RDONLY) && test_opt(sbi, DISABLE_CHECKPOINT)) {
1852                 err = -EINVAL;
1853                 f2fs_warn(sbi, "disabling checkpoint not compatible with read-only");
1854                 goto restore_opts;
1855         }
1856
1857         /*
1858          * We stop the GC thread if FS is mounted as RO
1859          * or if background_gc = off is passed in mount
1860          * option. Also sync the filesystem.
1861          */
1862         if ((*flags & SB_RDONLY) ||
1863                         F2FS_OPTION(sbi).bggc_mode == BGGC_MODE_OFF) {
1864                 if (sbi->gc_thread) {
1865                         f2fs_stop_gc_thread(sbi);
1866                         need_restart_gc = true;
1867                 }
1868         } else if (!sbi->gc_thread) {
1869                 err = f2fs_start_gc_thread(sbi);
1870                 if (err)
1871                         goto restore_opts;
1872                 need_stop_gc = true;
1873         }
1874
1875         if (*flags & SB_RDONLY ||
1876                 F2FS_OPTION(sbi).whint_mode != org_mount_opt.whint_mode) {
1877                 writeback_inodes_sb(sb, WB_REASON_SYNC);
1878                 sync_inodes_sb(sb);
1879
1880                 set_sbi_flag(sbi, SBI_IS_DIRTY);
1881                 set_sbi_flag(sbi, SBI_IS_CLOSE);
1882                 f2fs_sync_fs(sb, 1);
1883                 clear_sbi_flag(sbi, SBI_IS_CLOSE);
1884         }
1885
1886         if (checkpoint_changed) {
1887                 if (test_opt(sbi, DISABLE_CHECKPOINT)) {
1888                         err = f2fs_disable_checkpoint(sbi);
1889                         if (err)
1890                                 goto restore_gc;
1891                 } else {
1892                         f2fs_enable_checkpoint(sbi);
1893                 }
1894         }
1895
1896         /*
1897          * We stop issue flush thread if FS is mounted as RO
1898          * or if flush_merge is not passed in mount option.
1899          */
1900         if ((*flags & SB_RDONLY) || !test_opt(sbi, FLUSH_MERGE)) {
1901                 clear_opt(sbi, FLUSH_MERGE);
1902                 f2fs_destroy_flush_cmd_control(sbi, false);
1903         } else {
1904                 err = f2fs_create_flush_cmd_control(sbi);
1905                 if (err)
1906                         goto restore_gc;
1907         }
1908 skip:
1909 #ifdef CONFIG_QUOTA
1910         /* Release old quota file names */
1911         for (i = 0; i < MAXQUOTAS; i++)
1912                 kfree(org_mount_opt.s_qf_names[i]);
1913 #endif
1914         /* Update the POSIXACL Flag */
1915         sb->s_flags = (sb->s_flags & ~SB_POSIXACL) |
1916                 (test_opt(sbi, POSIX_ACL) ? SB_POSIXACL : 0);
1917
1918         limit_reserve_root(sbi);
1919         adjust_unusable_cap_perc(sbi);
1920         *flags = (*flags & ~SB_LAZYTIME) | (sb->s_flags & SB_LAZYTIME);
1921         return 0;
1922 restore_gc:
1923         if (need_restart_gc) {
1924                 if (f2fs_start_gc_thread(sbi))
1925                         f2fs_warn(sbi, "background gc thread has stopped");
1926         } else if (need_stop_gc) {
1927                 f2fs_stop_gc_thread(sbi);
1928         }
1929 restore_opts:
1930 #ifdef CONFIG_QUOTA
1931         F2FS_OPTION(sbi).s_jquota_fmt = org_mount_opt.s_jquota_fmt;
1932         for (i = 0; i < MAXQUOTAS; i++) {
1933                 kfree(F2FS_OPTION(sbi).s_qf_names[i]);
1934                 F2FS_OPTION(sbi).s_qf_names[i] = org_mount_opt.s_qf_names[i];
1935         }
1936 #endif
1937         sbi->mount_opt = org_mount_opt;
1938         sb->s_flags = old_sb_flags;
1939         return err;
1940 }
1941
1942 #ifdef CONFIG_QUOTA
1943 /* Read data from quotafile */
1944 static ssize_t f2fs_quota_read(struct super_block *sb, int type, char *data,
1945                                size_t len, loff_t off)
1946 {
1947         struct inode *inode = sb_dqopt(sb)->files[type];
1948         struct address_space *mapping = inode->i_mapping;
1949         block_t blkidx = F2FS_BYTES_TO_BLK(off);
1950         int offset = off & (sb->s_blocksize - 1);
1951         int tocopy;
1952         size_t toread;
1953         loff_t i_size = i_size_read(inode);
1954         struct page *page;
1955         char *kaddr;
1956
1957         if (off > i_size)
1958                 return 0;
1959
1960         if (off + len > i_size)
1961                 len = i_size - off;
1962         toread = len;
1963         while (toread > 0) {
1964                 tocopy = min_t(unsigned long, sb->s_blocksize - offset, toread);
1965 repeat:
1966                 page = read_cache_page_gfp(mapping, blkidx, GFP_NOFS);
1967                 if (IS_ERR(page)) {
1968                         if (PTR_ERR(page) == -ENOMEM) {
1969                                 congestion_wait(BLK_RW_ASYNC,
1970                                                 DEFAULT_IO_TIMEOUT);
1971                                 goto repeat;
1972                         }
1973                         set_sbi_flag(F2FS_SB(sb), SBI_QUOTA_NEED_REPAIR);
1974                         return PTR_ERR(page);
1975                 }
1976
1977                 lock_page(page);
1978
1979                 if (unlikely(page->mapping != mapping)) {
1980                         f2fs_put_page(page, 1);
1981                         goto repeat;
1982                 }
1983                 if (unlikely(!PageUptodate(page))) {
1984                         f2fs_put_page(page, 1);
1985                         set_sbi_flag(F2FS_SB(sb), SBI_QUOTA_NEED_REPAIR);
1986                         return -EIO;
1987                 }
1988
1989                 kaddr = kmap_atomic(page);
1990                 memcpy(data, kaddr + offset, tocopy);
1991                 kunmap_atomic(kaddr);
1992                 f2fs_put_page(page, 1);
1993
1994                 offset = 0;
1995                 toread -= tocopy;
1996                 data += tocopy;
1997                 blkidx++;
1998         }
1999         return len;
2000 }
2001
2002 /* Write to quotafile */
2003 static ssize_t f2fs_quota_write(struct super_block *sb, int type,
2004                                 const char *data, size_t len, loff_t off)
2005 {
2006         struct inode *inode = sb_dqopt(sb)->files[type];
2007         struct address_space *mapping = inode->i_mapping;
2008         const struct address_space_operations *a_ops = mapping->a_ops;
2009         int offset = off & (sb->s_blocksize - 1);
2010         size_t towrite = len;
2011         struct page *page;
2012         void *fsdata = NULL;
2013         char *kaddr;
2014         int err = 0;
2015         int tocopy;
2016
2017         while (towrite > 0) {
2018                 tocopy = min_t(unsigned long, sb->s_blocksize - offset,
2019                                                                 towrite);
2020 retry:
2021                 err = a_ops->write_begin(NULL, mapping, off, tocopy, 0,
2022                                                         &page, &fsdata);
2023                 if (unlikely(err)) {
2024                         if (err == -ENOMEM) {
2025                                 congestion_wait(BLK_RW_ASYNC,
2026                                                 DEFAULT_IO_TIMEOUT);
2027                                 goto retry;
2028                         }
2029                         set_sbi_flag(F2FS_SB(sb), SBI_QUOTA_NEED_REPAIR);
2030                         break;
2031                 }
2032
2033                 kaddr = kmap_atomic(page);
2034                 memcpy(kaddr + offset, data, tocopy);
2035                 kunmap_atomic(kaddr);
2036                 flush_dcache_page(page);
2037
2038                 a_ops->write_end(NULL, mapping, off, tocopy, tocopy,
2039                                                 page, fsdata);
2040                 offset = 0;
2041                 towrite -= tocopy;
2042                 off += tocopy;
2043                 data += tocopy;
2044                 cond_resched();
2045         }
2046
2047         if (len == towrite)
2048                 return err;
2049         inode->i_mtime = inode->i_ctime = current_time(inode);
2050         f2fs_mark_inode_dirty_sync(inode, false);
2051         return len - towrite;
2052 }
2053
2054 static struct dquot **f2fs_get_dquots(struct inode *inode)
2055 {
2056         return F2FS_I(inode)->i_dquot;
2057 }
2058
2059 static qsize_t *f2fs_get_reserved_space(struct inode *inode)
2060 {
2061         return &F2FS_I(inode)->i_reserved_quota;
2062 }
2063
2064 static int f2fs_quota_on_mount(struct f2fs_sb_info *sbi, int type)
2065 {
2066         if (is_set_ckpt_flags(sbi, CP_QUOTA_NEED_FSCK_FLAG)) {
2067                 f2fs_err(sbi, "quota sysfile may be corrupted, skip loading it");
2068                 return 0;
2069         }
2070
2071         return dquot_quota_on_mount(sbi->sb, F2FS_OPTION(sbi).s_qf_names[type],
2072                                         F2FS_OPTION(sbi).s_jquota_fmt, type);
2073 }
2074
2075 int f2fs_enable_quota_files(struct f2fs_sb_info *sbi, bool rdonly)
2076 {
2077         int enabled = 0;
2078         int i, err;
2079
2080         if (f2fs_sb_has_quota_ino(sbi) && rdonly) {
2081                 err = f2fs_enable_quotas(sbi->sb);
2082                 if (err) {
2083                         f2fs_err(sbi, "Cannot turn on quota_ino: %d", err);
2084                         return 0;
2085                 }
2086                 return 1;
2087         }
2088
2089         for (i = 0; i < MAXQUOTAS; i++) {
2090                 if (F2FS_OPTION(sbi).s_qf_names[i]) {
2091                         err = f2fs_quota_on_mount(sbi, i);
2092                         if (!err) {
2093                                 enabled = 1;
2094                                 continue;
2095                         }
2096                         f2fs_err(sbi, "Cannot turn on quotas: %d on %d",
2097                                  err, i);
2098                 }
2099         }
2100         return enabled;
2101 }
2102
2103 static int f2fs_quota_enable(struct super_block *sb, int type, int format_id,
2104                              unsigned int flags)
2105 {
2106         struct inode *qf_inode;
2107         unsigned long qf_inum;
2108         int err;
2109
2110         BUG_ON(!f2fs_sb_has_quota_ino(F2FS_SB(sb)));
2111
2112         qf_inum = f2fs_qf_ino(sb, type);
2113         if (!qf_inum)
2114                 return -EPERM;
2115
2116         qf_inode = f2fs_iget(sb, qf_inum);
2117         if (IS_ERR(qf_inode)) {
2118                 f2fs_err(F2FS_SB(sb), "Bad quota inode %u:%lu", type, qf_inum);
2119                 return PTR_ERR(qf_inode);
2120         }
2121
2122         /* Don't account quota for quota files to avoid recursion */
2123         qf_inode->i_flags |= S_NOQUOTA;
2124         err = dquot_load_quota_inode(qf_inode, type, format_id, flags);
2125         iput(qf_inode);
2126         return err;
2127 }
2128
2129 static int f2fs_enable_quotas(struct super_block *sb)
2130 {
2131         struct f2fs_sb_info *sbi = F2FS_SB(sb);
2132         int type, err = 0;
2133         unsigned long qf_inum;
2134         bool quota_mopt[MAXQUOTAS] = {
2135                 test_opt(sbi, USRQUOTA),
2136                 test_opt(sbi, GRPQUOTA),
2137                 test_opt(sbi, PRJQUOTA),
2138         };
2139
2140         if (is_set_ckpt_flags(F2FS_SB(sb), CP_QUOTA_NEED_FSCK_FLAG)) {
2141                 f2fs_err(sbi, "quota file may be corrupted, skip loading it");
2142                 return 0;
2143         }
2144
2145         sb_dqopt(sb)->flags |= DQUOT_QUOTA_SYS_FILE;
2146
2147         for (type = 0; type < MAXQUOTAS; type++) {
2148                 qf_inum = f2fs_qf_ino(sb, type);
2149                 if (qf_inum) {
2150                         err = f2fs_quota_enable(sb, type, QFMT_VFS_V1,
2151                                 DQUOT_USAGE_ENABLED |
2152                                 (quota_mopt[type] ? DQUOT_LIMITS_ENABLED : 0));
2153                         if (err) {
2154                                 f2fs_err(sbi, "Failed to enable quota tracking (type=%d, err=%d). Please run fsck to fix.",
2155                                          type, err);
2156                                 for (type--; type >= 0; type--)
2157                                         dquot_quota_off(sb, type);
2158                                 set_sbi_flag(F2FS_SB(sb),
2159                                                 SBI_QUOTA_NEED_REPAIR);
2160                                 return err;
2161                         }
2162                 }
2163         }
2164         return 0;
2165 }
2166
2167 int f2fs_quota_sync(struct super_block *sb, int type)
2168 {
2169         struct f2fs_sb_info *sbi = F2FS_SB(sb);
2170         struct quota_info *dqopt = sb_dqopt(sb);
2171         int cnt;
2172         int ret;
2173
2174         /*
2175          * do_quotactl
2176          *  f2fs_quota_sync
2177          *  down_read(quota_sem)
2178          *  dquot_writeback_dquots()
2179          *  f2fs_dquot_commit
2180          *                            block_operation
2181          *                            down_read(quota_sem)
2182          */
2183         f2fs_lock_op(sbi);
2184
2185         down_read(&sbi->quota_sem);
2186         ret = dquot_writeback_dquots(sb, type);
2187         if (ret)
2188                 goto out;
2189
2190         /*
2191          * Now when everything is written we can discard the pagecache so
2192          * that userspace sees the changes.
2193          */
2194         for (cnt = 0; cnt < MAXQUOTAS; cnt++) {
2195                 struct address_space *mapping;
2196
2197                 if (type != -1 && cnt != type)
2198                         continue;
2199                 if (!sb_has_quota_active(sb, cnt))
2200                         continue;
2201
2202                 mapping = dqopt->files[cnt]->i_mapping;
2203
2204                 ret = filemap_fdatawrite(mapping);
2205                 if (ret)
2206                         goto out;
2207
2208                 /* if we are using journalled quota */
2209                 if (is_journalled_quota(sbi))
2210                         continue;
2211
2212                 ret = filemap_fdatawait(mapping);
2213                 if (ret)
2214                         set_sbi_flag(F2FS_SB(sb), SBI_QUOTA_NEED_REPAIR);
2215
2216                 inode_lock(dqopt->files[cnt]);
2217                 truncate_inode_pages(&dqopt->files[cnt]->i_data, 0);
2218                 inode_unlock(dqopt->files[cnt]);
2219         }
2220 out:
2221         if (ret)
2222                 set_sbi_flag(F2FS_SB(sb), SBI_QUOTA_NEED_REPAIR);
2223         up_read(&sbi->quota_sem);
2224         f2fs_unlock_op(sbi);
2225         return ret;
2226 }
2227
2228 static int f2fs_quota_on(struct super_block *sb, int type, int format_id,
2229                                                         const struct path *path)
2230 {
2231         struct inode *inode;
2232         int err;
2233
2234         /* if quota sysfile exists, deny enabling quota with specific file */
2235         if (f2fs_sb_has_quota_ino(F2FS_SB(sb))) {
2236                 f2fs_err(F2FS_SB(sb), "quota sysfile already exists");
2237                 return -EBUSY;
2238         }
2239
2240         err = f2fs_quota_sync(sb, type);
2241         if (err)
2242                 return err;
2243
2244         err = dquot_quota_on(sb, type, format_id, path);
2245         if (err)
2246                 return err;
2247
2248         inode = d_inode(path->dentry);
2249
2250         inode_lock(inode);
2251         F2FS_I(inode)->i_flags |= F2FS_NOATIME_FL | F2FS_IMMUTABLE_FL;
2252         f2fs_set_inode_flags(inode);
2253         inode_unlock(inode);
2254         f2fs_mark_inode_dirty_sync(inode, false);
2255
2256         return 0;
2257 }
2258
2259 static int __f2fs_quota_off(struct super_block *sb, int type)
2260 {
2261         struct inode *inode = sb_dqopt(sb)->files[type];
2262         int err;
2263
2264         if (!inode || !igrab(inode))
2265                 return dquot_quota_off(sb, type);
2266
2267         err = f2fs_quota_sync(sb, type);
2268         if (err)
2269                 goto out_put;
2270
2271         err = dquot_quota_off(sb, type);
2272         if (err || f2fs_sb_has_quota_ino(F2FS_SB(sb)))
2273                 goto out_put;
2274
2275         inode_lock(inode);
2276         F2FS_I(inode)->i_flags &= ~(F2FS_NOATIME_FL | F2FS_IMMUTABLE_FL);
2277         f2fs_set_inode_flags(inode);
2278         inode_unlock(inode);
2279         f2fs_mark_inode_dirty_sync(inode, false);
2280 out_put:
2281         iput(inode);
2282         return err;
2283 }
2284
2285 static int f2fs_quota_off(struct super_block *sb, int type)
2286 {
2287         struct f2fs_sb_info *sbi = F2FS_SB(sb);
2288         int err;
2289
2290         err = __f2fs_quota_off(sb, type);
2291
2292         /*
2293          * quotactl can shutdown journalled quota, result in inconsistence
2294          * between quota record and fs data by following updates, tag the
2295          * flag to let fsck be aware of it.
2296          */
2297         if (is_journalled_quota(sbi))
2298                 set_sbi_flag(sbi, SBI_QUOTA_NEED_REPAIR);
2299         return err;
2300 }
2301
2302 void f2fs_quota_off_umount(struct super_block *sb)
2303 {
2304         int type;
2305         int err;
2306
2307         for (type = 0; type < MAXQUOTAS; type++) {
2308                 err = __f2fs_quota_off(sb, type);
2309                 if (err) {
2310                         int ret = dquot_quota_off(sb, type);
2311
2312                         f2fs_err(F2FS_SB(sb), "Fail to turn off disk quota (type: %d, err: %d, ret:%d), Please run fsck to fix it.",
2313                                  type, err, ret);
2314                         set_sbi_flag(F2FS_SB(sb), SBI_QUOTA_NEED_REPAIR);
2315                 }
2316         }
2317         /*
2318          * In case of checkpoint=disable, we must flush quota blocks.
2319          * This can cause NULL exception for node_inode in end_io, since
2320          * put_super already dropped it.
2321          */
2322         sync_filesystem(sb);
2323 }
2324
2325 static void f2fs_truncate_quota_inode_pages(struct super_block *sb)
2326 {
2327         struct quota_info *dqopt = sb_dqopt(sb);
2328         int type;
2329
2330         for (type = 0; type < MAXQUOTAS; type++) {
2331                 if (!dqopt->files[type])
2332                         continue;
2333                 f2fs_inode_synced(dqopt->files[type]);
2334         }
2335 }
2336
2337 static int f2fs_dquot_commit(struct dquot *dquot)
2338 {
2339         struct f2fs_sb_info *sbi = F2FS_SB(dquot->dq_sb);
2340         int ret;
2341
2342         down_read_nested(&sbi->quota_sem, SINGLE_DEPTH_NESTING);
2343         ret = dquot_commit(dquot);
2344         if (ret < 0)
2345                 set_sbi_flag(sbi, SBI_QUOTA_NEED_REPAIR);
2346         up_read(&sbi->quota_sem);
2347         return ret;
2348 }
2349
2350 static int f2fs_dquot_acquire(struct dquot *dquot)
2351 {
2352         struct f2fs_sb_info *sbi = F2FS_SB(dquot->dq_sb);
2353         int ret;
2354
2355         down_read(&sbi->quota_sem);
2356         ret = dquot_acquire(dquot);
2357         if (ret < 0)
2358                 set_sbi_flag(sbi, SBI_QUOTA_NEED_REPAIR);
2359         up_read(&sbi->quota_sem);
2360         return ret;
2361 }
2362
2363 static int f2fs_dquot_release(struct dquot *dquot)
2364 {
2365         struct f2fs_sb_info *sbi = F2FS_SB(dquot->dq_sb);
2366         int ret = dquot_release(dquot);
2367
2368         if (ret < 0)
2369                 set_sbi_flag(sbi, SBI_QUOTA_NEED_REPAIR);
2370         return ret;
2371 }
2372
2373 static int f2fs_dquot_mark_dquot_dirty(struct dquot *dquot)
2374 {
2375         struct super_block *sb = dquot->dq_sb;
2376         struct f2fs_sb_info *sbi = F2FS_SB(sb);
2377         int ret = dquot_mark_dquot_dirty(dquot);
2378
2379         /* if we are using journalled quota */
2380         if (is_journalled_quota(sbi))
2381                 set_sbi_flag(sbi, SBI_QUOTA_NEED_FLUSH);
2382
2383         return ret;
2384 }
2385
2386 static int f2fs_dquot_commit_info(struct super_block *sb, int type)
2387 {
2388         struct f2fs_sb_info *sbi = F2FS_SB(sb);
2389         int ret = dquot_commit_info(sb, type);
2390
2391         if (ret < 0)
2392                 set_sbi_flag(sbi, SBI_QUOTA_NEED_REPAIR);
2393         return ret;
2394 }
2395
2396 static int f2fs_get_projid(struct inode *inode, kprojid_t *projid)
2397 {
2398         *projid = F2FS_I(inode)->i_projid;
2399         return 0;
2400 }
2401
2402 static const struct dquot_operations f2fs_quota_operations = {
2403         .get_reserved_space = f2fs_get_reserved_space,
2404         .write_dquot    = f2fs_dquot_commit,
2405         .acquire_dquot  = f2fs_dquot_acquire,
2406         .release_dquot  = f2fs_dquot_release,
2407         .mark_dirty     = f2fs_dquot_mark_dquot_dirty,
2408         .write_info     = f2fs_dquot_commit_info,
2409         .alloc_dquot    = dquot_alloc,
2410         .destroy_dquot  = dquot_destroy,
2411         .get_projid     = f2fs_get_projid,
2412         .get_next_id    = dquot_get_next_id,
2413 };
2414
2415 static const struct quotactl_ops f2fs_quotactl_ops = {
2416         .quota_on       = f2fs_quota_on,
2417         .quota_off      = f2fs_quota_off,
2418         .quota_sync     = f2fs_quota_sync,
2419         .get_state      = dquot_get_state,
2420         .set_info       = dquot_set_dqinfo,
2421         .get_dqblk      = dquot_get_dqblk,
2422         .set_dqblk      = dquot_set_dqblk,
2423         .get_nextdqblk  = dquot_get_next_dqblk,
2424 };
2425 #else
2426 int f2fs_quota_sync(struct super_block *sb, int type)
2427 {
2428         return 0;
2429 }
2430
2431 void f2fs_quota_off_umount(struct super_block *sb)
2432 {
2433 }
2434 #endif
2435
2436 static const struct super_operations f2fs_sops = {
2437         .alloc_inode    = f2fs_alloc_inode,
2438         .free_inode     = f2fs_free_inode,
2439         .drop_inode     = f2fs_drop_inode,
2440         .write_inode    = f2fs_write_inode,
2441         .dirty_inode    = f2fs_dirty_inode,
2442         .show_options   = f2fs_show_options,
2443 #ifdef CONFIG_QUOTA
2444         .quota_read     = f2fs_quota_read,
2445         .quota_write    = f2fs_quota_write,
2446         .get_dquots     = f2fs_get_dquots,
2447 #endif
2448         .evict_inode    = f2fs_evict_inode,
2449         .put_super      = f2fs_put_super,
2450         .sync_fs        = f2fs_sync_fs,
2451         .freeze_fs      = f2fs_freeze,
2452         .unfreeze_fs    = f2fs_unfreeze,
2453         .statfs         = f2fs_statfs,
2454         .remount_fs     = f2fs_remount,
2455 };
2456
2457 #ifdef CONFIG_FS_ENCRYPTION
2458 static int f2fs_get_context(struct inode *inode, void *ctx, size_t len)
2459 {
2460         return f2fs_getxattr(inode, F2FS_XATTR_INDEX_ENCRYPTION,
2461                                 F2FS_XATTR_NAME_ENCRYPTION_CONTEXT,
2462                                 ctx, len, NULL);
2463 }
2464
2465 static int f2fs_set_context(struct inode *inode, const void *ctx, size_t len,
2466                                                         void *fs_data)
2467 {
2468         struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
2469
2470         /*
2471          * Encrypting the root directory is not allowed because fsck
2472          * expects lost+found directory to exist and remain unencrypted
2473          * if LOST_FOUND feature is enabled.
2474          *
2475          */
2476         if (f2fs_sb_has_lost_found(sbi) &&
2477                         inode->i_ino == F2FS_ROOT_INO(sbi))
2478                 return -EPERM;
2479
2480         return f2fs_setxattr(inode, F2FS_XATTR_INDEX_ENCRYPTION,
2481                                 F2FS_XATTR_NAME_ENCRYPTION_CONTEXT,
2482                                 ctx, len, fs_data, XATTR_CREATE);
2483 }
2484
2485 static const union fscrypt_context *
2486 f2fs_get_dummy_context(struct super_block *sb)
2487 {
2488         return F2FS_OPTION(F2FS_SB(sb)).dummy_enc_ctx.ctx;
2489 }
2490
2491 static bool f2fs_has_stable_inodes(struct super_block *sb)
2492 {
2493         return true;
2494 }
2495
2496 static void f2fs_get_ino_and_lblk_bits(struct super_block *sb,
2497                                        int *ino_bits_ret, int *lblk_bits_ret)
2498 {
2499         *ino_bits_ret = 8 * sizeof(nid_t);
2500         *lblk_bits_ret = 8 * sizeof(block_t);
2501 }
2502
2503 static int f2fs_get_num_devices(struct super_block *sb)
2504 {
2505         struct f2fs_sb_info *sbi = F2FS_SB(sb);
2506
2507         if (f2fs_is_multi_device(sbi))
2508                 return sbi->s_ndevs;
2509         return 1;
2510 }
2511
2512 static void f2fs_get_devices(struct super_block *sb,
2513                              struct request_queue **devs)
2514 {
2515         struct f2fs_sb_info *sbi = F2FS_SB(sb);
2516         int i;
2517
2518         for (i = 0; i < sbi->s_ndevs; i++)
2519                 devs[i] = bdev_get_queue(FDEV(i).bdev);
2520 }
2521
2522 static const struct fscrypt_operations f2fs_cryptops = {
2523         .key_prefix             = "f2fs:",
2524         .get_context            = f2fs_get_context,
2525         .set_context            = f2fs_set_context,
2526         .get_dummy_context      = f2fs_get_dummy_context,
2527         .empty_dir              = f2fs_empty_dir,
2528         .max_namelen            = F2FS_NAME_LEN,
2529         .has_stable_inodes      = f2fs_has_stable_inodes,
2530         .get_ino_and_lblk_bits  = f2fs_get_ino_and_lblk_bits,
2531         .get_num_devices        = f2fs_get_num_devices,
2532         .get_devices            = f2fs_get_devices,
2533 };
2534 #endif
2535
2536 static struct inode *f2fs_nfs_get_inode(struct super_block *sb,
2537                 u64 ino, u32 generation)
2538 {
2539         struct f2fs_sb_info *sbi = F2FS_SB(sb);
2540         struct inode *inode;
2541
2542         if (f2fs_check_nid_range(sbi, ino))
2543                 return ERR_PTR(-ESTALE);
2544
2545         /*
2546          * f2fs_iget isn't quite right if the inode is currently unallocated!
2547          * However f2fs_iget currently does appropriate checks to handle stale
2548          * inodes so everything is OK.
2549          */
2550         inode = f2fs_iget(sb, ino);
2551         if (IS_ERR(inode))
2552                 return ERR_CAST(inode);
2553         if (unlikely(generation && inode->i_generation != generation)) {
2554                 /* we didn't find the right inode.. */
2555                 iput(inode);
2556                 return ERR_PTR(-ESTALE);
2557         }
2558         return inode;
2559 }
2560
2561 static struct dentry *f2fs_fh_to_dentry(struct super_block *sb, struct fid *fid,
2562                 int fh_len, int fh_type)
2563 {
2564         return generic_fh_to_dentry(sb, fid, fh_len, fh_type,
2565                                     f2fs_nfs_get_inode);
2566 }
2567
2568 static struct dentry *f2fs_fh_to_parent(struct super_block *sb, struct fid *fid,
2569                 int fh_len, int fh_type)
2570 {
2571         return generic_fh_to_parent(sb, fid, fh_len, fh_type,
2572                                     f2fs_nfs_get_inode);
2573 }
2574
2575 static const struct export_operations f2fs_export_ops = {
2576         .fh_to_dentry = f2fs_fh_to_dentry,
2577         .fh_to_parent = f2fs_fh_to_parent,
2578         .get_parent = f2fs_get_parent,
2579 };
2580
2581 static loff_t max_file_blocks(void)
2582 {
2583         loff_t result = 0;
2584         loff_t leaf_count = DEF_ADDRS_PER_BLOCK;
2585
2586         /*
2587          * note: previously, result is equal to (DEF_ADDRS_PER_INODE -
2588          * DEFAULT_INLINE_XATTR_ADDRS), but now f2fs try to reserve more
2589          * space in inode.i_addr, it will be more safe to reassign
2590          * result as zero.
2591          */
2592
2593         /* two direct node blocks */
2594         result += (leaf_count * 2);
2595
2596         /* two indirect node blocks */
2597         leaf_count *= NIDS_PER_BLOCK;
2598         result += (leaf_count * 2);
2599
2600         /* one double indirect node block */
2601         leaf_count *= NIDS_PER_BLOCK;
2602         result += leaf_count;
2603
2604         return result;
2605 }
2606
2607 static int __f2fs_commit_super(struct buffer_head *bh,
2608                         struct f2fs_super_block *super)
2609 {
2610         lock_buffer(bh);
2611         if (super)
2612                 memcpy(bh->b_data + F2FS_SUPER_OFFSET, super, sizeof(*super));
2613         set_buffer_dirty(bh);
2614         unlock_buffer(bh);
2615
2616         /* it's rare case, we can do fua all the time */
2617         return __sync_dirty_buffer(bh, REQ_SYNC | REQ_PREFLUSH | REQ_FUA);
2618 }
2619
2620 static inline bool sanity_check_area_boundary(struct f2fs_sb_info *sbi,
2621                                         struct buffer_head *bh)
2622 {
2623         struct f2fs_super_block *raw_super = (struct f2fs_super_block *)
2624                                         (bh->b_data + F2FS_SUPER_OFFSET);
2625         struct super_block *sb = sbi->sb;
2626         u32 segment0_blkaddr = le32_to_cpu(raw_super->segment0_blkaddr);
2627         u32 cp_blkaddr = le32_to_cpu(raw_super->cp_blkaddr);
2628         u32 sit_blkaddr = le32_to_cpu(raw_super->sit_blkaddr);
2629         u32 nat_blkaddr = le32_to_cpu(raw_super->nat_blkaddr);
2630         u32 ssa_blkaddr = le32_to_cpu(raw_super->ssa_blkaddr);
2631         u32 main_blkaddr = le32_to_cpu(raw_super->main_blkaddr);
2632         u32 segment_count_ckpt = le32_to_cpu(raw_super->segment_count_ckpt);
2633         u32 segment_count_sit = le32_to_cpu(raw_super->segment_count_sit);
2634         u32 segment_count_nat = le32_to_cpu(raw_super->segment_count_nat);
2635         u32 segment_count_ssa = le32_to_cpu(raw_super->segment_count_ssa);
2636         u32 segment_count_main = le32_to_cpu(raw_super->segment_count_main);
2637         u32 segment_count = le32_to_cpu(raw_super->segment_count);
2638         u32 log_blocks_per_seg = le32_to_cpu(raw_super->log_blocks_per_seg);
2639         u64 main_end_blkaddr = main_blkaddr +
2640                                 (segment_count_main << log_blocks_per_seg);
2641         u64 seg_end_blkaddr = segment0_blkaddr +
2642                                 (segment_count << log_blocks_per_seg);
2643
2644         if (segment0_blkaddr != cp_blkaddr) {
2645                 f2fs_info(sbi, "Mismatch start address, segment0(%u) cp_blkaddr(%u)",
2646                           segment0_blkaddr, cp_blkaddr);
2647                 return true;
2648         }
2649
2650         if (cp_blkaddr + (segment_count_ckpt << log_blocks_per_seg) !=
2651                                                         sit_blkaddr) {
2652                 f2fs_info(sbi, "Wrong CP boundary, start(%u) end(%u) blocks(%u)",
2653                           cp_blkaddr, sit_blkaddr,
2654                           segment_count_ckpt << log_blocks_per_seg);
2655                 return true;
2656         }
2657
2658         if (sit_blkaddr + (segment_count_sit << log_blocks_per_seg) !=
2659                                                         nat_blkaddr) {
2660                 f2fs_info(sbi, "Wrong SIT boundary, start(%u) end(%u) blocks(%u)",
2661                           sit_blkaddr, nat_blkaddr,
2662                           segment_count_sit << log_blocks_per_seg);
2663                 return true;
2664         }
2665
2666         if (nat_blkaddr + (segment_count_nat << log_blocks_per_seg) !=
2667                                                         ssa_blkaddr) {
2668                 f2fs_info(sbi, "Wrong NAT boundary, start(%u) end(%u) blocks(%u)",
2669                           nat_blkaddr, ssa_blkaddr,
2670                           segment_count_nat << log_blocks_per_seg);
2671                 return true;
2672         }
2673
2674         if (ssa_blkaddr + (segment_count_ssa << log_blocks_per_seg) !=
2675                                                         main_blkaddr) {
2676                 f2fs_info(sbi, "Wrong SSA boundary, start(%u) end(%u) blocks(%u)",
2677                           ssa_blkaddr, main_blkaddr,
2678                           segment_count_ssa << log_blocks_per_seg);
2679                 return true;
2680         }
2681
2682         if (main_end_blkaddr > seg_end_blkaddr) {
2683                 f2fs_info(sbi, "Wrong MAIN_AREA boundary, start(%u) end(%u) block(%u)",
2684                           main_blkaddr,
2685                           segment0_blkaddr +
2686                           (segment_count << log_blocks_per_seg),
2687                           segment_count_main << log_blocks_per_seg);
2688                 return true;
2689         } else if (main_end_blkaddr < seg_end_blkaddr) {
2690                 int err = 0;
2691                 char *res;
2692
2693                 /* fix in-memory information all the time */
2694                 raw_super->segment_count = cpu_to_le32((main_end_blkaddr -
2695                                 segment0_blkaddr) >> log_blocks_per_seg);
2696
2697                 if (f2fs_readonly(sb) || bdev_read_only(sb->s_bdev)) {
2698                         set_sbi_flag(sbi, SBI_NEED_SB_WRITE);
2699                         res = "internally";
2700                 } else {
2701                         err = __f2fs_commit_super(bh, NULL);
2702                         res = err ? "failed" : "done";
2703                 }
2704                 f2fs_info(sbi, "Fix alignment : %s, start(%u) end(%u) block(%u)",
2705                           res, main_blkaddr,
2706                           segment0_blkaddr +
2707                           (segment_count << log_blocks_per_seg),
2708                           segment_count_main << log_blocks_per_seg);
2709                 if (err)
2710                         return true;
2711         }
2712         return false;
2713 }
2714
2715 static int sanity_check_raw_super(struct f2fs_sb_info *sbi,
2716                                 struct buffer_head *bh)
2717 {
2718         block_t segment_count, segs_per_sec, secs_per_zone;
2719         block_t total_sections, blocks_per_seg;
2720         struct f2fs_super_block *raw_super = (struct f2fs_super_block *)
2721                                         (bh->b_data + F2FS_SUPER_OFFSET);
2722         unsigned int blocksize;
2723         size_t crc_offset = 0;
2724         __u32 crc = 0;
2725
2726         if (le32_to_cpu(raw_super->magic) != F2FS_SUPER_MAGIC) {
2727                 f2fs_info(sbi, "Magic Mismatch, valid(0x%x) - read(0x%x)",
2728                           F2FS_SUPER_MAGIC, le32_to_cpu(raw_super->magic));
2729                 return -EINVAL;
2730         }
2731
2732         /* Check checksum_offset and crc in superblock */
2733         if (__F2FS_HAS_FEATURE(raw_super, F2FS_FEATURE_SB_CHKSUM)) {
2734                 crc_offset = le32_to_cpu(raw_super->checksum_offset);
2735                 if (crc_offset !=
2736                         offsetof(struct f2fs_super_block, crc)) {
2737                         f2fs_info(sbi, "Invalid SB checksum offset: %zu",
2738                                   crc_offset);
2739                         return -EFSCORRUPTED;
2740                 }
2741                 crc = le32_to_cpu(raw_super->crc);
2742                 if (!f2fs_crc_valid(sbi, crc, raw_super, crc_offset)) {
2743                         f2fs_info(sbi, "Invalid SB checksum value: %u", crc);
2744                         return -EFSCORRUPTED;
2745                 }
2746         }
2747
2748         /* Currently, support only 4KB page cache size */
2749         if (F2FS_BLKSIZE != PAGE_SIZE) {
2750                 f2fs_info(sbi, "Invalid page_cache_size (%lu), supports only 4KB",
2751                           PAGE_SIZE);
2752                 return -EFSCORRUPTED;
2753         }
2754
2755         /* Currently, support only 4KB block size */
2756         blocksize = 1 << le32_to_cpu(raw_super->log_blocksize);
2757         if (blocksize != F2FS_BLKSIZE) {
2758                 f2fs_info(sbi, "Invalid blocksize (%u), supports only 4KB",
2759                           blocksize);
2760                 return -EFSCORRUPTED;
2761         }
2762
2763         /* check log blocks per segment */
2764         if (le32_to_cpu(raw_super->log_blocks_per_seg) != 9) {
2765                 f2fs_info(sbi, "Invalid log blocks per segment (%u)",
2766                           le32_to_cpu(raw_super->log_blocks_per_seg));
2767                 return -EFSCORRUPTED;
2768         }
2769
2770         /* Currently, support 512/1024/2048/4096 bytes sector size */
2771         if (le32_to_cpu(raw_super->log_sectorsize) >
2772                                 F2FS_MAX_LOG_SECTOR_SIZE ||
2773                 le32_to_cpu(raw_super->log_sectorsize) <
2774                                 F2FS_MIN_LOG_SECTOR_SIZE) {
2775                 f2fs_info(sbi, "Invalid log sectorsize (%u)",
2776                           le32_to_cpu(raw_super->log_sectorsize));
2777                 return -EFSCORRUPTED;
2778         }
2779         if (le32_to_cpu(raw_super->log_sectors_per_block) +
2780                 le32_to_cpu(raw_super->log_sectorsize) !=
2781                         F2FS_MAX_LOG_SECTOR_SIZE) {
2782                 f2fs_info(sbi, "Invalid log sectors per block(%u) log sectorsize(%u)",
2783                           le32_to_cpu(raw_super->log_sectors_per_block),
2784                           le32_to_cpu(raw_super->log_sectorsize));
2785                 return -EFSCORRUPTED;
2786         }
2787
2788         segment_count = le32_to_cpu(raw_super->segment_count);
2789         segs_per_sec = le32_to_cpu(raw_super->segs_per_sec);
2790         secs_per_zone = le32_to_cpu(raw_super->secs_per_zone);
2791         total_sections = le32_to_cpu(raw_super->section_count);
2792
2793         /* blocks_per_seg should be 512, given the above check */
2794         blocks_per_seg = 1 << le32_to_cpu(raw_super->log_blocks_per_seg);
2795
2796         if (segment_count > F2FS_MAX_SEGMENT ||
2797                                 segment_count < F2FS_MIN_SEGMENTS) {
2798                 f2fs_info(sbi, "Invalid segment count (%u)", segment_count);
2799                 return -EFSCORRUPTED;
2800         }
2801
2802         if (total_sections > segment_count ||
2803                         total_sections < F2FS_MIN_SEGMENTS ||
2804                         segs_per_sec > segment_count || !segs_per_sec) {
2805                 f2fs_info(sbi, "Invalid segment/section count (%u, %u x %u)",
2806                           segment_count, total_sections, segs_per_sec);
2807                 return -EFSCORRUPTED;
2808         }
2809
2810         if ((segment_count / segs_per_sec) < total_sections) {
2811                 f2fs_info(sbi, "Small segment_count (%u < %u * %u)",
2812                           segment_count, segs_per_sec, total_sections);
2813                 return -EFSCORRUPTED;
2814         }
2815
2816         if (segment_count > (le64_to_cpu(raw_super->block_count) >> 9)) {
2817                 f2fs_info(sbi, "Wrong segment_count / block_count (%u > %llu)",
2818                           segment_count, le64_to_cpu(raw_super->block_count));
2819                 return -EFSCORRUPTED;
2820         }
2821
2822         if (RDEV(0).path[0]) {
2823                 block_t dev_seg_count = le32_to_cpu(RDEV(0).total_segments);
2824                 int i = 1;
2825
2826                 while (i < MAX_DEVICES && RDEV(i).path[0]) {
2827                         dev_seg_count += le32_to_cpu(RDEV(i).total_segments);
2828                         i++;
2829                 }
2830                 if (segment_count != dev_seg_count) {
2831                         f2fs_info(sbi, "Segment count (%u) mismatch with total segments from devices (%u)",
2832                                         segment_count, dev_seg_count);
2833                         return -EFSCORRUPTED;
2834                 }
2835         }
2836
2837         if (secs_per_zone > total_sections || !secs_per_zone) {
2838                 f2fs_info(sbi, "Wrong secs_per_zone / total_sections (%u, %u)",
2839                           secs_per_zone, total_sections);
2840                 return -EFSCORRUPTED;
2841         }
2842         if (le32_to_cpu(raw_super->extension_count) > F2FS_MAX_EXTENSION ||
2843                         raw_super->hot_ext_count > F2FS_MAX_EXTENSION ||
2844                         (le32_to_cpu(raw_super->extension_count) +
2845                         raw_super->hot_ext_count) > F2FS_MAX_EXTENSION) {
2846                 f2fs_info(sbi, "Corrupted extension count (%u + %u > %u)",
2847                           le32_to_cpu(raw_super->extension_count),
2848                           raw_super->hot_ext_count,
2849                           F2FS_MAX_EXTENSION);
2850                 return -EFSCORRUPTED;
2851         }
2852
2853         if (le32_to_cpu(raw_super->cp_payload) >
2854                                 (blocks_per_seg - F2FS_CP_PACKS)) {
2855                 f2fs_info(sbi, "Insane cp_payload (%u > %u)",
2856                           le32_to_cpu(raw_super->cp_payload),
2857                           blocks_per_seg - F2FS_CP_PACKS);
2858                 return -EFSCORRUPTED;
2859         }
2860
2861         /* check reserved ino info */
2862         if (le32_to_cpu(raw_super->node_ino) != 1 ||
2863                 le32_to_cpu(raw_super->meta_ino) != 2 ||
2864                 le32_to_cpu(raw_super->root_ino) != 3) {
2865                 f2fs_info(sbi, "Invalid Fs Meta Ino: node(%u) meta(%u) root(%u)",
2866                           le32_to_cpu(raw_super->node_ino),
2867                           le32_to_cpu(raw_super->meta_ino),
2868                           le32_to_cpu(raw_super->root_ino));
2869                 return -EFSCORRUPTED;
2870         }
2871
2872         /* check CP/SIT/NAT/SSA/MAIN_AREA area boundary */
2873         if (sanity_check_area_boundary(sbi, bh))
2874                 return -EFSCORRUPTED;
2875
2876         return 0;
2877 }
2878
2879 int f2fs_sanity_check_ckpt(struct f2fs_sb_info *sbi)
2880 {
2881         unsigned int total, fsmeta;
2882         struct f2fs_super_block *raw_super = F2FS_RAW_SUPER(sbi);
2883         struct f2fs_checkpoint *ckpt = F2FS_CKPT(sbi);
2884         unsigned int ovp_segments, reserved_segments;
2885         unsigned int main_segs, blocks_per_seg;
2886         unsigned int sit_segs, nat_segs;
2887         unsigned int sit_bitmap_size, nat_bitmap_size;
2888         unsigned int log_blocks_per_seg;
2889         unsigned int segment_count_main;
2890         unsigned int cp_pack_start_sum, cp_payload;
2891         block_t user_block_count, valid_user_blocks;
2892         block_t avail_node_count, valid_node_count;
2893         int i, j;
2894
2895         total = le32_to_cpu(raw_super->segment_count);
2896         fsmeta = le32_to_cpu(raw_super->segment_count_ckpt);
2897         sit_segs = le32_to_cpu(raw_super->segment_count_sit);
2898         fsmeta += sit_segs;
2899         nat_segs = le32_to_cpu(raw_super->segment_count_nat);
2900         fsmeta += nat_segs;
2901         fsmeta += le32_to_cpu(ckpt->rsvd_segment_count);
2902         fsmeta += le32_to_cpu(raw_super->segment_count_ssa);
2903
2904         if (unlikely(fsmeta >= total))
2905                 return 1;
2906
2907         ovp_segments = le32_to_cpu(ckpt->overprov_segment_count);
2908         reserved_segments = le32_to_cpu(ckpt->rsvd_segment_count);
2909
2910         if (unlikely(fsmeta < F2FS_MIN_SEGMENTS ||
2911                         ovp_segments == 0 || reserved_segments == 0)) {
2912                 f2fs_err(sbi, "Wrong layout: check mkfs.f2fs version");
2913                 return 1;
2914         }
2915
2916         user_block_count = le64_to_cpu(ckpt->user_block_count);
2917         segment_count_main = le32_to_cpu(raw_super->segment_count_main);
2918         log_blocks_per_seg = le32_to_cpu(raw_super->log_blocks_per_seg);
2919         if (!user_block_count || user_block_count >=
2920                         segment_count_main << log_blocks_per_seg) {
2921                 f2fs_err(sbi, "Wrong user_block_count: %u",
2922                          user_block_count);
2923                 return 1;
2924         }
2925
2926         valid_user_blocks = le64_to_cpu(ckpt->valid_block_count);
2927         if (valid_user_blocks > user_block_count) {
2928                 f2fs_err(sbi, "Wrong valid_user_blocks: %u, user_block_count: %u",
2929                          valid_user_blocks, user_block_count);
2930                 return 1;
2931         }
2932
2933         valid_node_count = le32_to_cpu(ckpt->valid_node_count);
2934         avail_node_count = sbi->total_node_count - F2FS_RESERVED_NODE_NUM;
2935         if (valid_node_count > avail_node_count) {
2936                 f2fs_err(sbi, "Wrong valid_node_count: %u, avail_node_count: %u",
2937                          valid_node_count, avail_node_count);
2938                 return 1;
2939         }
2940
2941         main_segs = le32_to_cpu(raw_super->segment_count_main);
2942         blocks_per_seg = sbi->blocks_per_seg;
2943
2944         for (i = 0; i < NR_CURSEG_NODE_TYPE; i++) {
2945                 if (le32_to_cpu(ckpt->cur_node_segno[i]) >= main_segs ||
2946                         le16_to_cpu(ckpt->cur_node_blkoff[i]) >= blocks_per_seg)
2947                         return 1;
2948                 for (j = i + 1; j < NR_CURSEG_NODE_TYPE; j++) {
2949                         if (le32_to_cpu(ckpt->cur_node_segno[i]) ==
2950                                 le32_to_cpu(ckpt->cur_node_segno[j])) {
2951                                 f2fs_err(sbi, "Node segment (%u, %u) has the same segno: %u",
2952                                          i, j,
2953                                          le32_to_cpu(ckpt->cur_node_segno[i]));
2954                                 return 1;
2955                         }
2956                 }
2957         }
2958         for (i = 0; i < NR_CURSEG_DATA_TYPE; i++) {
2959                 if (le32_to_cpu(ckpt->cur_data_segno[i]) >= main_segs ||
2960                         le16_to_cpu(ckpt->cur_data_blkoff[i]) >= blocks_per_seg)
2961                         return 1;
2962                 for (j = i + 1; j < NR_CURSEG_DATA_TYPE; j++) {
2963                         if (le32_to_cpu(ckpt->cur_data_segno[i]) ==
2964                                 le32_to_cpu(ckpt->cur_data_segno[j])) {
2965                                 f2fs_err(sbi, "Data segment (%u, %u) has the same segno: %u",
2966                                          i, j,
2967                                          le32_to_cpu(ckpt->cur_data_segno[i]));
2968                                 return 1;
2969                         }
2970                 }
2971         }
2972         for (i = 0; i < NR_CURSEG_NODE_TYPE; i++) {
2973                 for (j = 0; j < NR_CURSEG_DATA_TYPE; j++) {
2974                         if (le32_to_cpu(ckpt->cur_node_segno[i]) ==
2975                                 le32_to_cpu(ckpt->cur_data_segno[j])) {
2976                                 f2fs_err(sbi, "Node segment (%u) and Data segment (%u) has the same segno: %u",
2977                                          i, j,
2978                                          le32_to_cpu(ckpt->cur_node_segno[i]));
2979                                 return 1;
2980                         }
2981                 }
2982         }
2983
2984         sit_bitmap_size = le32_to_cpu(ckpt->sit_ver_bitmap_bytesize);
2985         nat_bitmap_size = le32_to_cpu(ckpt->nat_ver_bitmap_bytesize);
2986
2987         if (sit_bitmap_size != ((sit_segs / 2) << log_blocks_per_seg) / 8 ||
2988                 nat_bitmap_size != ((nat_segs / 2) << log_blocks_per_seg) / 8) {
2989                 f2fs_err(sbi, "Wrong bitmap size: sit: %u, nat:%u",
2990                          sit_bitmap_size, nat_bitmap_size);
2991                 return 1;
2992         }
2993
2994         cp_pack_start_sum = __start_sum_addr(sbi);
2995         cp_payload = __cp_payload(sbi);
2996         if (cp_pack_start_sum < cp_payload + 1 ||
2997                 cp_pack_start_sum > blocks_per_seg - 1 -
2998                         NR_CURSEG_TYPE) {
2999                 f2fs_err(sbi, "Wrong cp_pack_start_sum: %u",
3000                          cp_pack_start_sum);
3001                 return 1;
3002         }
3003
3004         if (__is_set_ckpt_flags(ckpt, CP_LARGE_NAT_BITMAP_FLAG) &&
3005                 le32_to_cpu(ckpt->checksum_offset) != CP_MIN_CHKSUM_OFFSET) {
3006                 f2fs_warn(sbi, "using deprecated layout of large_nat_bitmap, "
3007                           "please run fsck v1.13.0 or higher to repair, chksum_offset: %u, "
3008                           "fixed with patch: \"f2fs-tools: relocate chksum_offset for large_nat_bitmap feature\"",
3009                           le32_to_cpu(ckpt->checksum_offset));
3010                 return 1;
3011         }
3012
3013         if (unlikely(f2fs_cp_error(sbi))) {
3014                 f2fs_err(sbi, "A bug case: need to run fsck");
3015                 return 1;
3016         }
3017         return 0;
3018 }
3019
3020 static void init_sb_info(struct f2fs_sb_info *sbi)
3021 {
3022         struct f2fs_super_block *raw_super = sbi->raw_super;
3023         int i;
3024
3025         sbi->log_sectors_per_block =
3026                 le32_to_cpu(raw_super->log_sectors_per_block);
3027         sbi->log_blocksize = le32_to_cpu(raw_super->log_blocksize);
3028         sbi->blocksize = 1 << sbi->log_blocksize;
3029         sbi->log_blocks_per_seg = le32_to_cpu(raw_super->log_blocks_per_seg);
3030         sbi->blocks_per_seg = 1 << sbi->log_blocks_per_seg;
3031         sbi->segs_per_sec = le32_to_cpu(raw_super->segs_per_sec);
3032         sbi->secs_per_zone = le32_to_cpu(raw_super->secs_per_zone);
3033         sbi->total_sections = le32_to_cpu(raw_super->section_count);
3034         sbi->total_node_count =
3035                 (le32_to_cpu(raw_super->segment_count_nat) / 2)
3036                         * sbi->blocks_per_seg * NAT_ENTRY_PER_BLOCK;
3037         sbi->root_ino_num = le32_to_cpu(raw_super->root_ino);
3038         sbi->node_ino_num = le32_to_cpu(raw_super->node_ino);
3039         sbi->meta_ino_num = le32_to_cpu(raw_super->meta_ino);
3040         sbi->cur_victim_sec = NULL_SECNO;
3041         sbi->next_victim_seg[BG_GC] = NULL_SEGNO;
3042         sbi->next_victim_seg[FG_GC] = NULL_SEGNO;
3043         sbi->max_victim_search = DEF_MAX_VICTIM_SEARCH;
3044         sbi->migration_granularity = sbi->segs_per_sec;
3045
3046         sbi->dir_level = DEF_DIR_LEVEL;
3047         sbi->interval_time[CP_TIME] = DEF_CP_INTERVAL;
3048         sbi->interval_time[REQ_TIME] = DEF_IDLE_INTERVAL;
3049         sbi->interval_time[DISCARD_TIME] = DEF_IDLE_INTERVAL;
3050         sbi->interval_time[GC_TIME] = DEF_IDLE_INTERVAL;
3051         sbi->interval_time[DISABLE_TIME] = DEF_DISABLE_INTERVAL;
3052         sbi->interval_time[UMOUNT_DISCARD_TIMEOUT] =
3053                                 DEF_UMOUNT_DISCARD_TIMEOUT;
3054         clear_sbi_flag(sbi, SBI_NEED_FSCK);
3055
3056         for (i = 0; i < NR_COUNT_TYPE; i++)
3057                 atomic_set(&sbi->nr_pages[i], 0);
3058
3059         for (i = 0; i < META; i++)
3060                 atomic_set(&sbi->wb_sync_req[i], 0);
3061
3062         INIT_LIST_HEAD(&sbi->s_list);
3063         mutex_init(&sbi->umount_mutex);
3064         init_rwsem(&sbi->io_order_lock);
3065         spin_lock_init(&sbi->cp_lock);
3066
3067         sbi->dirty_device = 0;
3068         spin_lock_init(&sbi->dev_lock);
3069
3070         init_rwsem(&sbi->sb_lock);
3071         init_rwsem(&sbi->pin_sem);
3072 }
3073
3074 static int init_percpu_info(struct f2fs_sb_info *sbi)
3075 {
3076         int err;
3077
3078         err = percpu_counter_init(&sbi->alloc_valid_block_count, 0, GFP_KERNEL);
3079         if (err)
3080                 return err;
3081
3082         err = percpu_counter_init(&sbi->total_valid_inode_count, 0,
3083                                                                 GFP_KERNEL);
3084         if (err)
3085                 percpu_counter_destroy(&sbi->alloc_valid_block_count);
3086
3087         return err;
3088 }
3089
3090 #ifdef CONFIG_BLK_DEV_ZONED
3091 static int f2fs_report_zone_cb(struct blk_zone *zone, unsigned int idx,
3092                                void *data)
3093 {
3094         struct f2fs_dev_info *dev = data;
3095
3096         if (zone->type != BLK_ZONE_TYPE_CONVENTIONAL)
3097                 set_bit(idx, dev->blkz_seq);
3098         return 0;
3099 }
3100
3101 static int init_blkz_info(struct f2fs_sb_info *sbi, int devi)
3102 {
3103         struct block_device *bdev = FDEV(devi).bdev;
3104         sector_t nr_sectors = bdev->bd_part->nr_sects;
3105         int ret;
3106
3107         if (!f2fs_sb_has_blkzoned(sbi))
3108                 return 0;
3109
3110         if (sbi->blocks_per_blkz && sbi->blocks_per_blkz !=
3111                                 SECTOR_TO_BLOCK(bdev_zone_sectors(bdev)))
3112                 return -EINVAL;
3113         sbi->blocks_per_blkz = SECTOR_TO_BLOCK(bdev_zone_sectors(bdev));
3114         if (sbi->log_blocks_per_blkz && sbi->log_blocks_per_blkz !=
3115                                 __ilog2_u32(sbi->blocks_per_blkz))
3116                 return -EINVAL;
3117         sbi->log_blocks_per_blkz = __ilog2_u32(sbi->blocks_per_blkz);
3118         FDEV(devi).nr_blkz = SECTOR_TO_BLOCK(nr_sectors) >>
3119                                         sbi->log_blocks_per_blkz;
3120         if (nr_sectors & (bdev_zone_sectors(bdev) - 1))
3121                 FDEV(devi).nr_blkz++;
3122
3123         FDEV(devi).blkz_seq = f2fs_kvzalloc(sbi,
3124                                         BITS_TO_LONGS(FDEV(devi).nr_blkz)
3125                                         * sizeof(unsigned long),
3126                                         GFP_KERNEL);
3127         if (!FDEV(devi).blkz_seq)
3128                 return -ENOMEM;
3129
3130         /* Get block zones type */
3131         ret = blkdev_report_zones(bdev, 0, BLK_ALL_ZONES, f2fs_report_zone_cb,
3132                                   &FDEV(devi));
3133         if (ret < 0)
3134                 return ret;
3135
3136         return 0;
3137 }
3138 #endif
3139
3140 /*
3141  * Read f2fs raw super block.
3142  * Because we have two copies of super block, so read both of them
3143  * to get the first valid one. If any one of them is broken, we pass
3144  * them recovery flag back to the caller.
3145  */
3146 static int read_raw_super_block(struct f2fs_sb_info *sbi,
3147                         struct f2fs_super_block **raw_super,
3148                         int *valid_super_block, int *recovery)
3149 {
3150         struct super_block *sb = sbi->sb;
3151         int block;
3152         struct buffer_head *bh;
3153         struct f2fs_super_block *super;
3154         int err = 0;
3155
3156         super = kzalloc(sizeof(struct f2fs_super_block), GFP_KERNEL);
3157         if (!super)
3158                 return -ENOMEM;
3159
3160         for (block = 0; block < 2; block++) {
3161                 bh = sb_bread(sb, block);
3162                 if (!bh) {
3163                         f2fs_err(sbi, "Unable to read %dth superblock",
3164                                  block + 1);
3165                         err = -EIO;
3166                         *recovery = 1;
3167                         continue;
3168                 }
3169
3170                 /* sanity checking of raw super */
3171                 err = sanity_check_raw_super(sbi, bh);
3172                 if (err) {
3173                         f2fs_err(sbi, "Can't find valid F2FS filesystem in %dth superblock",
3174                                  block + 1);
3175                         brelse(bh);
3176                         *recovery = 1;
3177                         continue;
3178                 }
3179
3180                 if (!*raw_super) {
3181                         memcpy(super, bh->b_data + F2FS_SUPER_OFFSET,
3182                                                         sizeof(*super));
3183                         *valid_super_block = block;
3184                         *raw_super = super;
3185                 }
3186                 brelse(bh);
3187         }
3188
3189         /* No valid superblock */
3190         if (!*raw_super)
3191                 kfree(super);
3192         else
3193                 err = 0;
3194
3195         return err;
3196 }
3197
3198 int f2fs_commit_super(struct f2fs_sb_info *sbi, bool recover)
3199 {
3200         struct buffer_head *bh;
3201         __u32 crc = 0;
3202         int err;
3203
3204         if ((recover && f2fs_readonly(sbi->sb)) ||
3205                                 bdev_read_only(sbi->sb->s_bdev)) {
3206                 set_sbi_flag(sbi, SBI_NEED_SB_WRITE);
3207                 return -EROFS;
3208         }
3209
3210         /* we should update superblock crc here */
3211         if (!recover && f2fs_sb_has_sb_chksum(sbi)) {
3212                 crc = f2fs_crc32(sbi, F2FS_RAW_SUPER(sbi),
3213                                 offsetof(struct f2fs_super_block, crc));
3214                 F2FS_RAW_SUPER(sbi)->crc = cpu_to_le32(crc);
3215         }
3216
3217         /* write back-up superblock first */
3218         bh = sb_bread(sbi->sb, sbi->valid_super_block ? 0 : 1);
3219         if (!bh)
3220                 return -EIO;
3221         err = __f2fs_commit_super(bh, F2FS_RAW_SUPER(sbi));
3222         brelse(bh);
3223
3224         /* if we are in recovery path, skip writing valid superblock */
3225         if (recover || err)
3226                 return err;
3227
3228         /* write current valid superblock */
3229         bh = sb_bread(sbi->sb, sbi->valid_super_block);
3230         if (!bh)
3231                 return -EIO;
3232         err = __f2fs_commit_super(bh, F2FS_RAW_SUPER(sbi));
3233         brelse(bh);
3234         return err;
3235 }
3236
3237 static int f2fs_scan_devices(struct f2fs_sb_info *sbi)
3238 {
3239         struct f2fs_super_block *raw_super = F2FS_RAW_SUPER(sbi);
3240         unsigned int max_devices = MAX_DEVICES;
3241         int i;
3242
3243         /* Initialize single device information */
3244         if (!RDEV(0).path[0]) {
3245                 if (!bdev_is_zoned(sbi->sb->s_bdev))
3246                         return 0;
3247                 max_devices = 1;
3248         }
3249
3250         /*
3251          * Initialize multiple devices information, or single
3252          * zoned block device information.
3253          */
3254         sbi->devs = f2fs_kzalloc(sbi,
3255                                  array_size(max_devices,
3256                                             sizeof(struct f2fs_dev_info)),
3257                                  GFP_KERNEL);
3258         if (!sbi->devs)
3259                 return -ENOMEM;
3260
3261         for (i = 0; i < max_devices; i++) {
3262
3263                 if (i > 0 && !RDEV(i).path[0])
3264                         break;
3265
3266                 if (max_devices == 1) {
3267                         /* Single zoned block device mount */
3268                         FDEV(0).bdev =
3269                                 blkdev_get_by_dev(sbi->sb->s_bdev->bd_dev,
3270                                         sbi->sb->s_mode, sbi->sb->s_type);
3271                 } else {
3272                         /* Multi-device mount */
3273                         memcpy(FDEV(i).path, RDEV(i).path, MAX_PATH_LEN);
3274                         FDEV(i).total_segments =
3275                                 le32_to_cpu(RDEV(i).total_segments);
3276                         if (i == 0) {
3277                                 FDEV(i).start_blk = 0;
3278                                 FDEV(i).end_blk = FDEV(i).start_blk +
3279                                     (FDEV(i).total_segments <<
3280                                     sbi->log_blocks_per_seg) - 1 +
3281                                     le32_to_cpu(raw_super->segment0_blkaddr);
3282                         } else {
3283                                 FDEV(i).start_blk = FDEV(i - 1).end_blk + 1;
3284                                 FDEV(i).end_blk = FDEV(i).start_blk +
3285                                         (FDEV(i).total_segments <<
3286                                         sbi->log_blocks_per_seg) - 1;
3287                         }
3288                         FDEV(i).bdev = blkdev_get_by_path(FDEV(i).path,
3289                                         sbi->sb->s_mode, sbi->sb->s_type);
3290                 }
3291                 if (IS_ERR(FDEV(i).bdev))
3292                         return PTR_ERR(FDEV(i).bdev);
3293
3294                 /* to release errored devices */
3295                 sbi->s_ndevs = i + 1;
3296
3297 #ifdef CONFIG_BLK_DEV_ZONED
3298                 if (bdev_zoned_model(FDEV(i).bdev) == BLK_ZONED_HM &&
3299                                 !f2fs_sb_has_blkzoned(sbi)) {
3300                         f2fs_err(sbi, "Zoned block device feature not enabled\n");
3301                         return -EINVAL;
3302                 }
3303                 if (bdev_zoned_model(FDEV(i).bdev) != BLK_ZONED_NONE) {
3304                         if (init_blkz_info(sbi, i)) {
3305                                 f2fs_err(sbi, "Failed to initialize F2FS blkzone information");
3306                                 return -EINVAL;
3307                         }
3308                         if (max_devices == 1)
3309                                 break;
3310                         f2fs_info(sbi, "Mount Device [%2d]: %20s, %8u, %8x - %8x (zone: %s)",
3311                                   i, FDEV(i).path,
3312                                   FDEV(i).total_segments,
3313                                   FDEV(i).start_blk, FDEV(i).end_blk,
3314                                   bdev_zoned_model(FDEV(i).bdev) == BLK_ZONED_HA ?
3315                                   "Host-aware" : "Host-managed");
3316                         continue;
3317                 }
3318 #endif
3319                 f2fs_info(sbi, "Mount Device [%2d]: %20s, %8u, %8x - %8x",
3320                           i, FDEV(i).path,
3321                           FDEV(i).total_segments,
3322                           FDEV(i).start_blk, FDEV(i).end_blk);
3323         }
3324         f2fs_info(sbi,
3325                   "IO Block Size: %8d KB", F2FS_IO_SIZE_KB(sbi));
3326         return 0;
3327 }
3328
3329 static int f2fs_setup_casefold(struct f2fs_sb_info *sbi)
3330 {
3331 #ifdef CONFIG_UNICODE
3332         if (f2fs_sb_has_casefold(sbi) && !sbi->s_encoding) {
3333                 const struct f2fs_sb_encodings *encoding_info;
3334                 struct unicode_map *encoding;
3335                 __u16 encoding_flags;
3336
3337                 if (f2fs_sb_has_encrypt(sbi)) {
3338                         f2fs_err(sbi,
3339                                 "Can't mount with encoding and encryption");
3340                         return -EINVAL;
3341                 }
3342
3343                 if (f2fs_sb_read_encoding(sbi->raw_super, &encoding_info,
3344                                           &encoding_flags)) {
3345                         f2fs_err(sbi,
3346                                  "Encoding requested by superblock is unknown");
3347                         return -EINVAL;
3348                 }
3349
3350                 encoding = utf8_load(encoding_info->version);
3351                 if (IS_ERR(encoding)) {
3352                         f2fs_err(sbi,
3353                                  "can't mount with superblock charset: %s-%s "
3354                                  "not supported by the kernel. flags: 0x%x.",
3355                                  encoding_info->name, encoding_info->version,
3356                                  encoding_flags);
3357                         return PTR_ERR(encoding);
3358                 }
3359                 f2fs_info(sbi, "Using encoding defined by superblock: "
3360                          "%s-%s with flags 0x%hx", encoding_info->name,
3361                          encoding_info->version?:"\b", encoding_flags);
3362
3363                 sbi->s_encoding = encoding;
3364                 sbi->s_encoding_flags = encoding_flags;
3365                 sbi->sb->s_d_op = &f2fs_dentry_ops;
3366         }
3367 #else
3368         if (f2fs_sb_has_casefold(sbi)) {
3369                 f2fs_err(sbi, "Filesystem with casefold feature cannot be mounted without CONFIG_UNICODE");
3370                 return -EINVAL;
3371         }
3372 #endif
3373         return 0;
3374 }
3375
3376 static void f2fs_tuning_parameters(struct f2fs_sb_info *sbi)
3377 {
3378         struct f2fs_sm_info *sm_i = SM_I(sbi);
3379
3380         /* adjust parameters according to the volume size */
3381         if (sm_i->main_segments <= SMALL_VOLUME_SEGMENTS) {
3382                 F2FS_OPTION(sbi).alloc_mode = ALLOC_MODE_REUSE;
3383                 sm_i->dcc_info->discard_granularity = 1;
3384                 sm_i->ipu_policy = 1 << F2FS_IPU_FORCE;
3385         }
3386
3387         sbi->readdir_ra = 1;
3388 }
3389
3390 static int f2fs_fill_super(struct super_block *sb, void *data, int silent)
3391 {
3392         struct f2fs_sb_info *sbi;
3393         struct f2fs_super_block *raw_super;
3394         struct inode *root;
3395         int err;
3396         bool skip_recovery = false, need_fsck = false;
3397         char *options = NULL;
3398         int recovery, i, valid_super_block;
3399         struct curseg_info *seg_i;
3400         int retry_cnt = 1;
3401
3402 try_onemore:
3403         err = -EINVAL;
3404         raw_super = NULL;
3405         valid_super_block = -1;
3406         recovery = 0;
3407
3408         /* allocate memory for f2fs-specific super block info */
3409         sbi = kzalloc(sizeof(struct f2fs_sb_info), GFP_KERNEL);
3410         if (!sbi)
3411                 return -ENOMEM;
3412
3413         sbi->sb = sb;
3414
3415         /* Load the checksum driver */
3416         sbi->s_chksum_driver = crypto_alloc_shash("crc32", 0, 0);
3417         if (IS_ERR(sbi->s_chksum_driver)) {
3418                 f2fs_err(sbi, "Cannot load crc32 driver.");
3419                 err = PTR_ERR(sbi->s_chksum_driver);
3420                 sbi->s_chksum_driver = NULL;
3421                 goto free_sbi;
3422         }
3423
3424         /* set a block size */
3425         if (unlikely(!sb_set_blocksize(sb, F2FS_BLKSIZE))) {
3426                 f2fs_err(sbi, "unable to set blocksize");
3427                 goto free_sbi;
3428         }
3429
3430         err = read_raw_super_block(sbi, &raw_super, &valid_super_block,
3431                                                                 &recovery);
3432         if (err)
3433                 goto free_sbi;
3434
3435         sb->s_fs_info = sbi;
3436         sbi->raw_super = raw_super;
3437
3438         /* precompute checksum seed for metadata */
3439         if (f2fs_sb_has_inode_chksum(sbi))
3440                 sbi->s_chksum_seed = f2fs_chksum(sbi, ~0, raw_super->uuid,
3441                                                 sizeof(raw_super->uuid));
3442
3443         /*
3444          * The BLKZONED feature indicates that the drive was formatted with
3445          * zone alignment optimization. This is optional for host-aware
3446          * devices, but mandatory for host-managed zoned block devices.
3447          */
3448 #ifndef CONFIG_BLK_DEV_ZONED
3449         if (f2fs_sb_has_blkzoned(sbi)) {
3450                 f2fs_err(sbi, "Zoned block device support is not enabled");
3451                 err = -EOPNOTSUPP;
3452                 goto free_sb_buf;
3453         }
3454 #endif
3455         default_options(sbi);
3456         /* parse mount options */
3457         options = kstrdup((const char *)data, GFP_KERNEL);
3458         if (data && !options) {
3459                 err = -ENOMEM;
3460                 goto free_sb_buf;
3461         }
3462
3463         err = parse_options(sb, options, false);
3464         if (err)
3465                 goto free_options;
3466
3467         sbi->max_file_blocks = max_file_blocks();
3468         sb->s_maxbytes = sbi->max_file_blocks <<
3469                                 le32_to_cpu(raw_super->log_blocksize);
3470         sb->s_max_links = F2FS_LINK_MAX;
3471
3472         err = f2fs_setup_casefold(sbi);
3473         if (err)
3474                 goto free_options;
3475
3476 #ifdef CONFIG_QUOTA
3477         sb->dq_op = &f2fs_quota_operations;
3478         sb->s_qcop = &f2fs_quotactl_ops;
3479         sb->s_quota_types = QTYPE_MASK_USR | QTYPE_MASK_GRP | QTYPE_MASK_PRJ;
3480
3481         if (f2fs_sb_has_quota_ino(sbi)) {
3482                 for (i = 0; i < MAXQUOTAS; i++) {
3483                         if (f2fs_qf_ino(sbi->sb, i))
3484                                 sbi->nquota_files++;
3485                 }
3486         }
3487 #endif
3488
3489         sb->s_op = &f2fs_sops;
3490 #ifdef CONFIG_FS_ENCRYPTION
3491         sb->s_cop = &f2fs_cryptops;
3492 #endif
3493 #ifdef CONFIG_FS_VERITY
3494         sb->s_vop = &f2fs_verityops;
3495 #endif
3496         sb->s_xattr = f2fs_xattr_handlers;
3497         sb->s_export_op = &f2fs_export_ops;
3498         sb->s_magic = F2FS_SUPER_MAGIC;
3499         sb->s_time_gran = 1;
3500         sb->s_flags = (sb->s_flags & ~SB_POSIXACL) |
3501                 (test_opt(sbi, POSIX_ACL) ? SB_POSIXACL : 0);
3502         memcpy(&sb->s_uuid, raw_super->uuid, sizeof(raw_super->uuid));
3503         sb->s_iflags |= SB_I_CGROUPWB;
3504
3505         /* init f2fs-specific super block info */
3506         sbi->valid_super_block = valid_super_block;
3507         init_rwsem(&sbi->gc_lock);
3508         mutex_init(&sbi->writepages);
3509         mutex_init(&sbi->cp_mutex);
3510         init_rwsem(&sbi->node_write);
3511         init_rwsem(&sbi->node_change);
3512
3513         /* disallow all the data/node/meta page writes */
3514         set_sbi_flag(sbi, SBI_POR_DOING);
3515         spin_lock_init(&sbi->stat_lock);
3516
3517         /* init iostat info */
3518         spin_lock_init(&sbi->iostat_lock);
3519         sbi->iostat_enable = false;
3520         sbi->iostat_period_ms = DEFAULT_IOSTAT_PERIOD_MS;
3521
3522         for (i = 0; i < NR_PAGE_TYPE; i++) {
3523                 int n = (i == META) ? 1: NR_TEMP_TYPE;
3524                 int j;
3525
3526                 sbi->write_io[i] =
3527                         f2fs_kmalloc(sbi,
3528                                      array_size(n,
3529                                                 sizeof(struct f2fs_bio_info)),
3530                                      GFP_KERNEL);
3531                 if (!sbi->write_io[i]) {
3532                         err = -ENOMEM;
3533                         goto free_bio_info;
3534                 }
3535
3536                 for (j = HOT; j < n; j++) {
3537                         init_rwsem(&sbi->write_io[i][j].io_rwsem);
3538                         sbi->write_io[i][j].sbi = sbi;
3539                         sbi->write_io[i][j].bio = NULL;
3540                         spin_lock_init(&sbi->write_io[i][j].io_lock);
3541                         INIT_LIST_HEAD(&sbi->write_io[i][j].io_list);
3542                         INIT_LIST_HEAD(&sbi->write_io[i][j].bio_list);
3543                         init_rwsem(&sbi->write_io[i][j].bio_list_lock);
3544                 }
3545         }
3546
3547         init_rwsem(&sbi->cp_rwsem);
3548         init_rwsem(&sbi->quota_sem);
3549         init_waitqueue_head(&sbi->cp_wait);
3550         init_sb_info(sbi);
3551
3552         err = init_percpu_info(sbi);
3553         if (err)
3554                 goto free_bio_info;
3555
3556         if (F2FS_IO_ALIGNED(sbi)) {
3557                 sbi->write_io_dummy =
3558                         mempool_create_page_pool(2 * (F2FS_IO_SIZE(sbi) - 1), 0);
3559                 if (!sbi->write_io_dummy) {
3560                         err = -ENOMEM;
3561                         goto free_percpu;
3562                 }
3563         }
3564
3565         /* init per sbi slab cache */
3566         err = f2fs_init_xattr_caches(sbi);
3567         if (err)
3568                 goto free_io_dummy;
3569
3570         /* get an inode for meta space */
3571         sbi->meta_inode = f2fs_iget(sb, F2FS_META_INO(sbi));
3572         if (IS_ERR(sbi->meta_inode)) {
3573                 f2fs_err(sbi, "Failed to read F2FS meta data inode");
3574                 err = PTR_ERR(sbi->meta_inode);
3575                 goto free_xattr_cache;
3576         }
3577
3578         err = f2fs_get_valid_checkpoint(sbi);
3579         if (err) {
3580                 f2fs_err(sbi, "Failed to get valid F2FS checkpoint");
3581                 goto free_meta_inode;
3582         }
3583
3584         if (__is_set_ckpt_flags(F2FS_CKPT(sbi), CP_QUOTA_NEED_FSCK_FLAG))
3585                 set_sbi_flag(sbi, SBI_QUOTA_NEED_REPAIR);
3586         if (__is_set_ckpt_flags(F2FS_CKPT(sbi), CP_DISABLED_QUICK_FLAG)) {
3587                 set_sbi_flag(sbi, SBI_CP_DISABLED_QUICK);
3588                 sbi->interval_time[DISABLE_TIME] = DEF_DISABLE_QUICK_INTERVAL;
3589         }
3590
3591         if (__is_set_ckpt_flags(F2FS_CKPT(sbi), CP_FSCK_FLAG))
3592                 set_sbi_flag(sbi, SBI_NEED_FSCK);
3593
3594         /* Initialize device list */
3595         err = f2fs_scan_devices(sbi);
3596         if (err) {
3597                 f2fs_err(sbi, "Failed to find devices");
3598                 goto free_devices;
3599         }
3600
3601         err = f2fs_init_post_read_wq(sbi);
3602         if (err) {
3603                 f2fs_err(sbi, "Failed to initialize post read workqueue");
3604                 goto free_devices;
3605         }
3606
3607         sbi->total_valid_node_count =
3608                                 le32_to_cpu(sbi->ckpt->valid_node_count);
3609         percpu_counter_set(&sbi->total_valid_inode_count,
3610                                 le32_to_cpu(sbi->ckpt->valid_inode_count));
3611         sbi->user_block_count = le64_to_cpu(sbi->ckpt->user_block_count);
3612         sbi->total_valid_block_count =
3613                                 le64_to_cpu(sbi->ckpt->valid_block_count);
3614         sbi->last_valid_block_count = sbi->total_valid_block_count;
3615         sbi->reserved_blocks = 0;
3616         sbi->current_reserved_blocks = 0;
3617         limit_reserve_root(sbi);
3618         adjust_unusable_cap_perc(sbi);
3619
3620         for (i = 0; i < NR_INODE_TYPE; i++) {
3621                 INIT_LIST_HEAD(&sbi->inode_list[i]);
3622                 spin_lock_init(&sbi->inode_lock[i]);
3623         }
3624         mutex_init(&sbi->flush_lock);
3625
3626         f2fs_init_extent_cache_info(sbi);
3627
3628         f2fs_init_ino_entry_info(sbi);
3629
3630         f2fs_init_fsync_node_info(sbi);
3631
3632         /* setup f2fs internal modules */
3633         err = f2fs_build_segment_manager(sbi);
3634         if (err) {
3635                 f2fs_err(sbi, "Failed to initialize F2FS segment manager (%d)",
3636                          err);
3637                 goto free_sm;
3638         }
3639         err = f2fs_build_node_manager(sbi);
3640         if (err) {
3641                 f2fs_err(sbi, "Failed to initialize F2FS node manager (%d)",
3642                          err);
3643                 goto free_nm;
3644         }
3645
3646         /* For write statistics */
3647         if (sb->s_bdev->bd_part)
3648                 sbi->sectors_written_start =
3649                         (u64)part_stat_read(sb->s_bdev->bd_part,
3650                                             sectors[STAT_WRITE]);
3651
3652         /* Read accumulated write IO statistics if exists */
3653         seg_i = CURSEG_I(sbi, CURSEG_HOT_NODE);
3654         if (__exist_node_summaries(sbi))
3655                 sbi->kbytes_written =
3656                         le64_to_cpu(seg_i->journal->info.kbytes_written);
3657
3658         f2fs_build_gc_manager(sbi);
3659
3660         err = f2fs_build_stats(sbi);
3661         if (err)
3662                 goto free_nm;
3663
3664         /* get an inode for node space */
3665         sbi->node_inode = f2fs_iget(sb, F2FS_NODE_INO(sbi));
3666         if (IS_ERR(sbi->node_inode)) {
3667                 f2fs_err(sbi, "Failed to read node inode");
3668                 err = PTR_ERR(sbi->node_inode);
3669                 goto free_stats;
3670         }
3671
3672         /* read root inode and dentry */
3673         root = f2fs_iget(sb, F2FS_ROOT_INO(sbi));
3674         if (IS_ERR(root)) {
3675                 f2fs_err(sbi, "Failed to read root inode");
3676                 err = PTR_ERR(root);
3677                 goto free_node_inode;
3678         }
3679         if (!S_ISDIR(root->i_mode) || !root->i_blocks ||
3680                         !root->i_size || !root->i_nlink) {
3681                 iput(root);
3682                 err = -EINVAL;
3683                 goto free_node_inode;
3684         }
3685
3686         sb->s_root = d_make_root(root); /* allocate root dentry */
3687         if (!sb->s_root) {
3688                 err = -ENOMEM;
3689                 goto free_node_inode;
3690         }
3691
3692         err = f2fs_register_sysfs(sbi);
3693         if (err)
3694                 goto free_root_inode;
3695
3696 #ifdef CONFIG_QUOTA
3697         /* Enable quota usage during mount */
3698         if (f2fs_sb_has_quota_ino(sbi) && !f2fs_readonly(sb)) {
3699                 err = f2fs_enable_quotas(sb);
3700                 if (err)
3701                         f2fs_err(sbi, "Cannot turn on quotas: error %d", err);
3702         }
3703 #endif
3704         /* if there are any orphan inodes, free them */
3705         err = f2fs_recover_orphan_inodes(sbi);
3706         if (err)
3707                 goto free_meta;
3708
3709         if (unlikely(is_set_ckpt_flags(sbi, CP_DISABLED_FLAG)))
3710                 goto reset_checkpoint;
3711
3712         /* recover fsynced data */
3713         if (!test_opt(sbi, DISABLE_ROLL_FORWARD) &&
3714                         !test_opt(sbi, NORECOVERY)) {
3715                 /*
3716                  * mount should be failed, when device has readonly mode, and
3717                  * previous checkpoint was not done by clean system shutdown.
3718                  */
3719                 if (f2fs_hw_is_readonly(sbi)) {
3720                         if (!is_set_ckpt_flags(sbi, CP_UMOUNT_FLAG)) {
3721                                 err = -EROFS;
3722                                 f2fs_err(sbi, "Need to recover fsync data, but write access unavailable");
3723                                 goto free_meta;
3724                         }
3725                         f2fs_info(sbi, "write access unavailable, skipping recovery");
3726                         goto reset_checkpoint;
3727                 }
3728
3729                 if (need_fsck)
3730                         set_sbi_flag(sbi, SBI_NEED_FSCK);
3731
3732                 if (skip_recovery)
3733                         goto reset_checkpoint;
3734
3735                 err = f2fs_recover_fsync_data(sbi, false);
3736                 if (err < 0) {
3737                         if (err != -ENOMEM)
3738                                 skip_recovery = true;
3739                         need_fsck = true;
3740                         f2fs_err(sbi, "Cannot recover all fsync data errno=%d",
3741                                  err);
3742                         goto free_meta;
3743                 }
3744         } else {
3745                 err = f2fs_recover_fsync_data(sbi, true);
3746
3747                 if (!f2fs_readonly(sb) && err > 0) {
3748                         err = -EINVAL;
3749                         f2fs_err(sbi, "Need to recover fsync data");
3750                         goto free_meta;
3751                 }
3752         }
3753
3754         /*
3755          * If the f2fs is not readonly and fsync data recovery succeeds,
3756          * check zoned block devices' write pointer consistency.
3757          */
3758         if (!err && !f2fs_readonly(sb) && f2fs_sb_has_blkzoned(sbi)) {
3759                 err = f2fs_check_write_pointer(sbi);
3760                 if (err)
3761                         goto free_meta;
3762         }
3763
3764 reset_checkpoint:
3765         /* f2fs_recover_fsync_data() cleared this already */
3766         clear_sbi_flag(sbi, SBI_POR_DOING);
3767
3768         if (test_opt(sbi, DISABLE_CHECKPOINT)) {
3769                 err = f2fs_disable_checkpoint(sbi);
3770                 if (err)
3771                         goto sync_free_meta;
3772         } else if (is_set_ckpt_flags(sbi, CP_DISABLED_FLAG)) {
3773                 f2fs_enable_checkpoint(sbi);
3774         }
3775
3776         /*
3777          * If filesystem is not mounted as read-only then
3778          * do start the gc_thread.
3779          */
3780         if (F2FS_OPTION(sbi).bggc_mode != BGGC_MODE_OFF && !f2fs_readonly(sb)) {
3781                 /* After POR, we can run background GC thread.*/
3782                 err = f2fs_start_gc_thread(sbi);
3783                 if (err)
3784                         goto sync_free_meta;
3785         }
3786         kvfree(options);
3787
3788         /* recover broken superblock */
3789         if (recovery) {
3790                 err = f2fs_commit_super(sbi, true);
3791                 f2fs_info(sbi, "Try to recover %dth superblock, ret: %d",
3792                           sbi->valid_super_block ? 1 : 2, err);
3793         }
3794
3795         f2fs_join_shrinker(sbi);
3796
3797         f2fs_tuning_parameters(sbi);
3798
3799         f2fs_notice(sbi, "Mounted with checkpoint version = %llx",
3800                     cur_cp_version(F2FS_CKPT(sbi)));
3801         f2fs_update_time(sbi, CP_TIME);
3802         f2fs_update_time(sbi, REQ_TIME);
3803         clear_sbi_flag(sbi, SBI_CP_DISABLED_QUICK);
3804         return 0;
3805
3806 sync_free_meta:
3807         /* safe to flush all the data */
3808         sync_filesystem(sbi->sb);
3809         retry_cnt = 0;
3810
3811 free_meta:
3812 #ifdef CONFIG_QUOTA
3813         f2fs_truncate_quota_inode_pages(sb);
3814         if (f2fs_sb_has_quota_ino(sbi) && !f2fs_readonly(sb))
3815                 f2fs_quota_off_umount(sbi->sb);
3816 #endif
3817         /*
3818          * Some dirty meta pages can be produced by f2fs_recover_orphan_inodes()
3819          * failed by EIO. Then, iput(node_inode) can trigger balance_fs_bg()
3820          * followed by f2fs_write_checkpoint() through f2fs_write_node_pages(), which
3821          * falls into an infinite loop in f2fs_sync_meta_pages().
3822          */
3823         truncate_inode_pages_final(META_MAPPING(sbi));
3824         /* evict some inodes being cached by GC */
3825         evict_inodes(sb);
3826         f2fs_unregister_sysfs(sbi);
3827 free_root_inode:
3828         dput(sb->s_root);
3829         sb->s_root = NULL;
3830 free_node_inode:
3831         f2fs_release_ino_entry(sbi, true);
3832         truncate_inode_pages_final(NODE_MAPPING(sbi));
3833         iput(sbi->node_inode);
3834         sbi->node_inode = NULL;
3835 free_stats:
3836         f2fs_destroy_stats(sbi);
3837 free_nm:
3838         f2fs_destroy_node_manager(sbi);
3839 free_sm:
3840         f2fs_destroy_segment_manager(sbi);
3841         f2fs_destroy_post_read_wq(sbi);
3842 free_devices:
3843         destroy_device_list(sbi);
3844         kvfree(sbi->ckpt);
3845 free_meta_inode:
3846         make_bad_inode(sbi->meta_inode);
3847         iput(sbi->meta_inode);
3848         sbi->meta_inode = NULL;
3849 free_xattr_cache:
3850         f2fs_destroy_xattr_caches(sbi);
3851 free_io_dummy:
3852         mempool_destroy(sbi->write_io_dummy);
3853 free_percpu:
3854         destroy_percpu_info(sbi);
3855 free_bio_info:
3856         for (i = 0; i < NR_PAGE_TYPE; i++)
3857                 kvfree(sbi->write_io[i]);
3858
3859 #ifdef CONFIG_UNICODE
3860         utf8_unload(sbi->s_encoding);
3861 #endif
3862 free_options:
3863 #ifdef CONFIG_QUOTA
3864         for (i = 0; i < MAXQUOTAS; i++)
3865                 kfree(F2FS_OPTION(sbi).s_qf_names[i]);
3866 #endif
3867         fscrypt_free_dummy_context(&F2FS_OPTION(sbi).dummy_enc_ctx);
3868         kvfree(options);
3869 free_sb_buf:
3870         kfree(raw_super);
3871 free_sbi:
3872         if (sbi->s_chksum_driver)
3873                 crypto_free_shash(sbi->s_chksum_driver);
3874         kfree(sbi);
3875
3876         /* give only one another chance */
3877         if (retry_cnt > 0 && skip_recovery) {
3878                 retry_cnt--;
3879                 shrink_dcache_sb(sb);
3880                 goto try_onemore;
3881         }
3882         return err;
3883 }
3884
3885 static struct dentry *f2fs_mount(struct file_system_type *fs_type, int flags,
3886                         const char *dev_name, void *data)
3887 {
3888         return mount_bdev(fs_type, flags, dev_name, data, f2fs_fill_super);
3889 }
3890
3891 static void kill_f2fs_super(struct super_block *sb)
3892 {
3893         if (sb->s_root) {
3894                 struct f2fs_sb_info *sbi = F2FS_SB(sb);
3895
3896                 set_sbi_flag(sbi, SBI_IS_CLOSE);
3897                 f2fs_stop_gc_thread(sbi);
3898                 f2fs_stop_discard_thread(sbi);
3899
3900                 if (is_sbi_flag_set(sbi, SBI_IS_DIRTY) ||
3901                                 !is_set_ckpt_flags(sbi, CP_UMOUNT_FLAG)) {
3902                         struct cp_control cpc = {
3903                                 .reason = CP_UMOUNT,
3904                         };
3905                         f2fs_write_checkpoint(sbi, &cpc);
3906                 }
3907
3908                 if (is_sbi_flag_set(sbi, SBI_IS_RECOVERED) && f2fs_readonly(sb))
3909                         sb->s_flags &= ~SB_RDONLY;
3910         }
3911         kill_block_super(sb);
3912 }
3913
3914 static struct file_system_type f2fs_fs_type = {
3915         .owner          = THIS_MODULE,
3916         .name           = "f2fs",
3917         .mount          = f2fs_mount,
3918         .kill_sb        = kill_f2fs_super,
3919         .fs_flags       = FS_REQUIRES_DEV,
3920 };
3921 MODULE_ALIAS_FS("f2fs");
3922
3923 static int __init init_inodecache(void)
3924 {
3925         f2fs_inode_cachep = kmem_cache_create("f2fs_inode_cache",
3926                         sizeof(struct f2fs_inode_info), 0,
3927                         SLAB_RECLAIM_ACCOUNT|SLAB_ACCOUNT, NULL);
3928         if (!f2fs_inode_cachep)
3929                 return -ENOMEM;
3930         return 0;
3931 }
3932
3933 static void destroy_inodecache(void)
3934 {
3935         /*
3936          * Make sure all delayed rcu free inodes are flushed before we
3937          * destroy cache.
3938          */
3939         rcu_barrier();
3940         kmem_cache_destroy(f2fs_inode_cachep);
3941 }
3942
3943 static int __init init_f2fs_fs(void)
3944 {
3945         int err;
3946
3947         if (PAGE_SIZE != F2FS_BLKSIZE) {
3948                 printk("F2FS not supported on PAGE_SIZE(%lu) != %d\n",
3949                                 PAGE_SIZE, F2FS_BLKSIZE);
3950                 return -EINVAL;
3951         }
3952
3953         f2fs_build_trace_ios();
3954
3955         err = init_inodecache();
3956         if (err)
3957                 goto fail;
3958         err = f2fs_create_node_manager_caches();
3959         if (err)
3960                 goto free_inodecache;
3961         err = f2fs_create_segment_manager_caches();
3962         if (err)
3963                 goto free_node_manager_caches;
3964         err = f2fs_create_checkpoint_caches();
3965         if (err)
3966                 goto free_segment_manager_caches;
3967         err = f2fs_create_extent_cache();
3968         if (err)
3969                 goto free_checkpoint_caches;
3970         err = f2fs_init_sysfs();
3971         if (err)
3972                 goto free_extent_cache;
3973         err = register_shrinker(&f2fs_shrinker_info);
3974         if (err)
3975                 goto free_sysfs;
3976         err = register_filesystem(&f2fs_fs_type);
3977         if (err)
3978                 goto free_shrinker;
3979         f2fs_create_root_stats();
3980         err = f2fs_init_post_read_processing();
3981         if (err)
3982                 goto free_root_stats;
3983         err = f2fs_init_bio_entry_cache();
3984         if (err)
3985                 goto free_post_read;
3986         err = f2fs_init_bioset();
3987         if (err)
3988                 goto free_bio_enrty_cache;
3989         err = f2fs_init_compress_mempool();
3990         if (err)
3991                 goto free_bioset;
3992         return 0;
3993 free_bioset:
3994         f2fs_destroy_bioset();
3995 free_bio_enrty_cache:
3996         f2fs_destroy_bio_entry_cache();
3997 free_post_read:
3998         f2fs_destroy_post_read_processing();
3999 free_root_stats:
4000         f2fs_destroy_root_stats();
4001         unregister_filesystem(&f2fs_fs_type);
4002 free_shrinker:
4003         unregister_shrinker(&f2fs_shrinker_info);
4004 free_sysfs:
4005         f2fs_exit_sysfs();
4006 free_extent_cache:
4007         f2fs_destroy_extent_cache();
4008 free_checkpoint_caches:
4009         f2fs_destroy_checkpoint_caches();
4010 free_segment_manager_caches:
4011         f2fs_destroy_segment_manager_caches();
4012 free_node_manager_caches:
4013         f2fs_destroy_node_manager_caches();
4014 free_inodecache:
4015         destroy_inodecache();
4016 fail:
4017         return err;
4018 }
4019
4020 static void __exit exit_f2fs_fs(void)
4021 {
4022         f2fs_destroy_compress_mempool();
4023         f2fs_destroy_bioset();
4024         f2fs_destroy_bio_entry_cache();
4025         f2fs_destroy_post_read_processing();
4026         f2fs_destroy_root_stats();
4027         unregister_filesystem(&f2fs_fs_type);
4028         unregister_shrinker(&f2fs_shrinker_info);
4029         f2fs_exit_sysfs();
4030         f2fs_destroy_extent_cache();
4031         f2fs_destroy_checkpoint_caches();
4032         f2fs_destroy_segment_manager_caches();
4033         f2fs_destroy_node_manager_caches();
4034         destroy_inodecache();
4035         f2fs_destroy_trace_ios();
4036 }
4037
4038 module_init(init_f2fs_fs)
4039 module_exit(exit_f2fs_fs)
4040
4041 MODULE_AUTHOR("Samsung Electronics's Praesto Team");
4042 MODULE_DESCRIPTION("Flash Friendly File System");
4043 MODULE_LICENSE("GPL");
4044