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_compress_chksum,
 150         Opt_compress_mode,
 151         Opt_atgc,
 152         Opt_err,
 153 };
 154
 155 static match_table_t f2fs_tokens = {
 156         {Opt_gc_background, "background_gc=%s"},
 157         {Opt_disable_roll_forward, "disable_roll_forward"},
 158         {Opt_norecovery, "norecovery"},
 159         {Opt_discard, "discard"},
 160         {Opt_nodiscard, "nodiscard"},
 161         {Opt_noheap, "no_heap"},
 162         {Opt_heap, "heap"},
 163         {Opt_user_xattr, "user_xattr"},
 164         {Opt_nouser_xattr, "nouser_xattr"},
 165         {Opt_acl, "acl"},
 166         {Opt_noacl, "noacl"},
 167         {Opt_active_logs, "active_logs=%u"},
 168         {Opt_disable_ext_identify, "disable_ext_identify"},
 169         {Opt_inline_xattr, "inline_xattr"},
 170         {Opt_noinline_xattr, "noinline_xattr"},
 171         {Opt_inline_xattr_size, "inline_xattr_size=%u"},
 172         {Opt_inline_data, "inline_data"},
 173         {Opt_inline_dentry, "inline_dentry"},
 174         {Opt_noinline_dentry, "noinline_dentry"},
 175         {Opt_flush_merge, "flush_merge"},
 176         {Opt_noflush_merge, "noflush_merge"},
 177         {Opt_nobarrier, "nobarrier"},
 178         {Opt_fastboot, "fastboot"},
 179         {Opt_extent_cache, "extent_cache"},
 180         {Opt_noextent_cache, "noextent_cache"},
 181         {Opt_noinline_data, "noinline_data"},
 182         {Opt_data_flush, "data_flush"},
 183         {Opt_reserve_root, "reserve_root=%u"},
 184         {Opt_resgid, "resgid=%u"},
 185         {Opt_resuid, "resuid=%u"},
 186         {Opt_mode, "mode=%s"},
 187         {Opt_io_size_bits, "io_bits=%u"},
 188         {Opt_fault_injection, "fault_injection=%u"},
 189         {Opt_fault_type, "fault_type=%u"},
 190         {Opt_lazytime, "lazytime"},
 191         {Opt_nolazytime, "nolazytime"},
 192         {Opt_quota, "quota"},
 193         {Opt_noquota, "noquota"},
 194         {Opt_usrquota, "usrquota"},
 195         {Opt_grpquota, "grpquota"},
 196         {Opt_prjquota, "prjquota"},
 197         {Opt_usrjquota, "usrjquota=%s"},
 198         {Opt_grpjquota, "grpjquota=%s"},
 199         {Opt_prjjquota, "prjjquota=%s"},
 200         {Opt_offusrjquota, "usrjquota="},
 201         {Opt_offgrpjquota, "grpjquota="},
 202         {Opt_offprjjquota, "prjjquota="},
 203         {Opt_jqfmt_vfsold, "jqfmt=vfsold"},
 204         {Opt_jqfmt_vfsv0, "jqfmt=vfsv0"},
 205         {Opt_jqfmt_vfsv1, "jqfmt=vfsv1"},
 206         {Opt_whint, "whint_mode=%s"},
 207         {Opt_alloc, "alloc_mode=%s"},
 208         {Opt_fsync, "fsync_mode=%s"},
 209         {Opt_test_dummy_encryption, "test_dummy_encryption=%s"},
 210         {Opt_test_dummy_encryption, "test_dummy_encryption"},
 211         {Opt_inlinecrypt, "inlinecrypt"},
 212         {Opt_checkpoint_disable, "checkpoint=disable"},
 213         {Opt_checkpoint_disable_cap, "checkpoint=disable:%u"},
 214         {Opt_checkpoint_disable_cap_perc, "checkpoint=disable:%u%%"},
 215         {Opt_checkpoint_enable, "checkpoint=enable"},
 216         {Opt_compress_algorithm, "compress_algorithm=%s"},
 217         {Opt_compress_log_size, "compress_log_size=%u"},
 218         {Opt_compress_extension, "compress_extension=%s"},
 219         {Opt_compress_chksum, "compress_chksum"},
 220         {Opt_compress_mode, "compress_mode=%s"},
 221         {Opt_atgc, "atgc"},
 222         {Opt_err, NULL},
 223 };
 224
 225 void f2fs_printk(struct f2fs_sb_info *sbi, const char *fmt, ...)
 226 {
 227         struct va_format vaf;
 228         va_list args;
 229         int level;
 230
 231         va_start(args, fmt);
 232
 233         level = printk_get_level(fmt);
 234         vaf.fmt = printk_skip_level(fmt);
 235         vaf.va = &args;
 236         printk("%c%cF2FS-fs (%s): %pV\n",
 237                KERN_SOH_ASCII, level, sbi->sb->s_id, &vaf);
 238
 239         va_end(args);
 240 }
 241
 242 #ifdef CONFIG_UNICODE
 243 static const struct f2fs_sb_encodings {
 244         __u16 magic;
 245         char *name;
 246         char *version;
 247 } f2fs_sb_encoding_map[] = {
 248         {F2FS_ENC_UTF8_12_1, "utf8", "12.1.0"},
 249 };
 250
 251 static int f2fs_sb_read_encoding(const struct f2fs_super_block *sb,
 252                                  const struct f2fs_sb_encodings **encoding,
 253                                  __u16 *flags)
 254 {
 255         __u16 magic = le16_to_cpu(sb->s_encoding);
 256         int i;
 257
 258         for (i = 0; i < ARRAY_SIZE(f2fs_sb_encoding_map); i++)
 259                 if (magic == f2fs_sb_encoding_map[i].magic)
 260                         break;
 261
 262         if (i >= ARRAY_SIZE(f2fs_sb_encoding_map))
 263                 return -EINVAL;
 264
 265         *encoding = &f2fs_sb_encoding_map[i];
 266         *flags = le16_to_cpu(sb->s_encoding_flags);
 267
 268         return 0;
 269 }
 270 #endif
 271
 272 static inline void limit_reserve_root(struct f2fs_sb_info *sbi)
 273 {
 274         block_t limit = min((sbi->user_block_count << 1) / 1000,
 275                         sbi->user_block_count - sbi->reserved_blocks);
 276
 277         /* limit is 0.2% */
 278         if (test_opt(sbi, RESERVE_ROOT) &&
 279                         F2FS_OPTION(sbi).root_reserved_blocks > limit) {
 280                 F2FS_OPTION(sbi).root_reserved_blocks = limit;
 281                 f2fs_info(sbi, "Reduce reserved blocks for root = %u",
 282                           F2FS_OPTION(sbi).root_reserved_blocks);
 283         }
 284         if (!test_opt(sbi, RESERVE_ROOT) &&
 285                 (!uid_eq(F2FS_OPTION(sbi).s_resuid,
 286                                 make_kuid(&init_user_ns, F2FS_DEF_RESUID)) ||
 287                 !gid_eq(F2FS_OPTION(sbi).s_resgid,
 288                                 make_kgid(&init_user_ns, F2FS_DEF_RESGID))))
 289                 f2fs_info(sbi, "Ignore s_resuid=%u, s_resgid=%u w/o reserve_root",
 290                           from_kuid_munged(&init_user_ns,
 291                                            F2FS_OPTION(sbi).s_resuid),
 292                           from_kgid_munged(&init_user_ns,
 293                                            F2FS_OPTION(sbi).s_resgid));
 294 }
 295
 296 static inline void adjust_unusable_cap_perc(struct f2fs_sb_info *sbi)
 297 {
 298         if (!F2FS_OPTION(sbi).unusable_cap_perc)
 299                 return;
 300
 301         if (F2FS_OPTION(sbi).unusable_cap_perc == 100)
 302                 F2FS_OPTION(sbi).unusable_cap = sbi->user_block_count;
 303         else
 304                 F2FS_OPTION(sbi).unusable_cap = (sbi->user_block_count / 100) *
 305                                         F2FS_OPTION(sbi).unusable_cap_perc;
 306
 307         f2fs_info(sbi, "Adjust unusable cap for checkpoint=disable = %u / %u%%",
 308                         F2FS_OPTION(sbi).unusable_cap,
 309                         F2FS_OPTION(sbi).unusable_cap_perc);
 310 }
 311
 312 static void init_once(void *foo)
 313 {
 314         struct f2fs_inode_info *fi = (struct f2fs_inode_info *) foo;
 315
 316         inode_init_once(&fi->vfs_inode);
 317 }
 318
 319 #ifdef CONFIG_QUOTA
 320 static const char * const quotatypes[] = INITQFNAMES;
 321 #define QTYPE2NAME(t) (quotatypes[t])
 322 static int f2fs_set_qf_name(struct super_block *sb, int qtype,
 323                                                         substring_t *args)
 324 {
 325         struct f2fs_sb_info *sbi = F2FS_SB(sb);
 326         char *qname;
 327         int ret = -EINVAL;
 328
 329         if (sb_any_quota_loaded(sb) && !F2FS_OPTION(sbi).s_qf_names[qtype]) {
 330                 f2fs_err(sbi, "Cannot change journaled quota options when quota turned on");
 331                 return -EINVAL;
 332         }
 333         if (f2fs_sb_has_quota_ino(sbi)) {
 334                 f2fs_info(sbi, "QUOTA feature is enabled, so ignore qf_name");
 335                 return 0;
 336         }
 337
 338         qname = match_strdup(args);
 339         if (!qname) {
 340                 f2fs_err(sbi, "Not enough memory for storing quotafile name");
 341                 return -ENOMEM;
 342         }
 343         if (F2FS_OPTION(sbi).s_qf_names[qtype]) {
 344                 if (strcmp(F2FS_OPTION(sbi).s_qf_names[qtype], qname) == 0)
 345                         ret = 0;
 346                 else
 347                         f2fs_err(sbi, "%s quota file already specified",
 348                                  QTYPE2NAME(qtype));
 349                 goto errout;
 350         }
 351         if (strchr(qname, '/')) {
 352                 f2fs_err(sbi, "quotafile must be on filesystem root");
 353                 goto errout;
 354         }
 355         F2FS_OPTION(sbi).s_qf_names[qtype] = qname;
 356         set_opt(sbi, QUOTA);
 357         return 0;
 358 errout:
 359         kfree(qname);
 360         return ret;
 361 }
 362
 363 static int f2fs_clear_qf_name(struct super_block *sb, int qtype)
 364 {
 365         struct f2fs_sb_info *sbi = F2FS_SB(sb);
 366
 367         if (sb_any_quota_loaded(sb) && F2FS_OPTION(sbi).s_qf_names[qtype]) {
 368                 f2fs_err(sbi, "Cannot change journaled quota options when quota turned on");
 369                 return -EINVAL;
 370         }
 371         kfree(F2FS_OPTION(sbi).s_qf_names[qtype]);
 372         F2FS_OPTION(sbi).s_qf_names[qtype] = NULL;
 373         return 0;
 374 }
 375
 376 static int f2fs_check_quota_options(struct f2fs_sb_info *sbi)
 377 {
 378         /*
 379          * We do the test below only for project quotas. 'usrquota' and
 380          * 'grpquota' mount options are allowed even without quota feature
 381          * to support legacy quotas in quota files.
 382          */
 383         if (test_opt(sbi, PRJQUOTA) && !f2fs_sb_has_project_quota(sbi)) {
 384                 f2fs_err(sbi, "Project quota feature not enabled. Cannot enable project quota enforcement.");
 385                 return -1;
 386         }
 387         if (F2FS_OPTION(sbi).s_qf_names[USRQUOTA] ||
 388                         F2FS_OPTION(sbi).s_qf_names[GRPQUOTA] ||
 389                         F2FS_OPTION(sbi).s_qf_names[PRJQUOTA]) {
 390                 if (test_opt(sbi, USRQUOTA) &&
 391                                 F2FS_OPTION(sbi).s_qf_names[USRQUOTA])
 392                         clear_opt(sbi, USRQUOTA);
 393
 394                 if (test_opt(sbi, GRPQUOTA) &&
 395                                 F2FS_OPTION(sbi).s_qf_names[GRPQUOTA])
 396                         clear_opt(sbi, GRPQUOTA);
 397
 398                 if (test_opt(sbi, PRJQUOTA) &&
 399                                 F2FS_OPTION(sbi).s_qf_names[PRJQUOTA])
 400                         clear_opt(sbi, PRJQUOTA);
 401
 402                 if (test_opt(sbi, GRPQUOTA) || test_opt(sbi, USRQUOTA) ||
 403                                 test_opt(sbi, PRJQUOTA)) {
 404                         f2fs_err(sbi, "old and new quota format mixing");
 405                         return -1;
 406                 }
 407
 408                 if (!F2FS_OPTION(sbi).s_jquota_fmt) {
 409                         f2fs_err(sbi, "journaled quota format not specified");
 410                         return -1;
 411                 }
 412         }
 413
 414         if (f2fs_sb_has_quota_ino(sbi) && F2FS_OPTION(sbi).s_jquota_fmt) {
 415                 f2fs_info(sbi, "QUOTA feature is enabled, so ignore jquota_fmt");
 416                 F2FS_OPTION(sbi).s_jquota_fmt = 0;
 417         }
 418         return 0;
 419 }
 420 #endif
 421
 422 static int f2fs_set_test_dummy_encryption(struct super_block *sb,
 423                                           const char *opt,
 424                                           const substring_t *arg,
 425                                           bool is_remount)
 426 {
 427         struct f2fs_sb_info *sbi = F2FS_SB(sb);
 428 #ifdef CONFIG_FS_ENCRYPTION
 429         int err;
 430
 431         if (!f2fs_sb_has_encrypt(sbi)) {
 432                 f2fs_err(sbi, "Encrypt feature is off");
 433                 return -EINVAL;
 434         }
 435
 436         /*
 437          * This mount option is just for testing, and it's not worthwhile to
 438          * implement the extra complexity (e.g. RCU protection) that would be
 439          * needed to allow it to be set or changed during remount.  We do allow
 440          * it to be specified during remount, but only if there is no change.
 441          */
 442         if (is_remount && !F2FS_OPTION(sbi).dummy_enc_policy.policy) {
 443                 f2fs_warn(sbi, "Can't set test_dummy_encryption on remount");
 444                 return -EINVAL;
 445         }
 446         err = fscrypt_set_test_dummy_encryption(
 447                 sb, arg->from, &F2FS_OPTION(sbi).dummy_enc_policy);
 448         if (err) {
 449                 if (err == -EEXIST)
 450                         f2fs_warn(sbi,
 451                                   "Can't change test_dummy_encryption on remount");
 452                 else if (err == -EINVAL)
 453                         f2fs_warn(sbi, "Value of option \"%s\" is unrecognized",
 454                                   opt);
 455                 else
 456                         f2fs_warn(sbi, "Error processing option \"%s\" [%d]",
 457                                   opt, err);
 458                 return -EINVAL;
 459         }
 460         f2fs_warn(sbi, "Test dummy encryption mode enabled");
 461 #else
 462         f2fs_warn(sbi, "Test dummy encryption mount option ignored");
 463 #endif
 464         return 0;
 465 }
 466
 467 static int parse_options(struct super_block *sb, char *options, bool is_remount)
 468 {
 469         struct f2fs_sb_info *sbi = F2FS_SB(sb);
 470         substring_t args[MAX_OPT_ARGS];
 471 #ifdef CONFIG_F2FS_FS_COMPRESSION
 472         unsigned char (*ext)[F2FS_EXTENSION_LEN];
 473         int ext_cnt;
 474 #endif
 475         char *p, *name;
 476         int arg = 0;
 477         kuid_t uid;
 478         kgid_t gid;
 479         int ret;
 480
 481         if (!options)
 482                 return 0;
 483
 484         while ((p = strsep(&options, ",")) != NULL) {
 485                 int token;
 486                 if (!*p)
 487                         continue;
 488                 /*
 489                  * Initialize args struct so we know whether arg was
 490                  * found; some options take optional arguments.
 491                  */
 492                 args[0].to = args[0].from = NULL;
 493                 token = match_token(p, f2fs_tokens, args);
 494
 495                 switch (token) {
 496                 case Opt_gc_background:
 497                         name = match_strdup(&args[0]);
 498
 499                         if (!name)
 500                                 return -ENOMEM;
 501                         if (!strcmp(name, "on")) {
 502                                 F2FS_OPTION(sbi).bggc_mode = BGGC_MODE_ON;
 503                         } else if (!strcmp(name, "off")) {
 504                                 F2FS_OPTION(sbi).bggc_mode = BGGC_MODE_OFF;
 505                         } else if (!strcmp(name, "sync")) {
 506                                 F2FS_OPTION(sbi).bggc_mode = BGGC_MODE_SYNC;
 507                         } else {
 508                                 kfree(name);
 509                                 return -EINVAL;
 510                         }
 511                         kfree(name);
 512                         break;
 513                 case Opt_disable_roll_forward:
 514                         set_opt(sbi, DISABLE_ROLL_FORWARD);
 515                         break;
 516                 case Opt_norecovery:
 517                         /* this option mounts f2fs with ro */
 518                         set_opt(sbi, NORECOVERY);
 519                         if (!f2fs_readonly(sb))
 520                                 return -EINVAL;
 521                         break;
 522                 case Opt_discard:
 523                         set_opt(sbi, DISCARD);
 524                         break;
 525                 case Opt_nodiscard:
 526                         if (f2fs_sb_has_blkzoned(sbi)) {
 527                                 f2fs_warn(sbi, "discard is required for zoned block devices");
 528                                 return -EINVAL;
 529                         }
 530                         clear_opt(sbi, DISCARD);
 531                         break;
 532                 case Opt_noheap:
 533                         set_opt(sbi, NOHEAP);
 534                         break;
 535                 case Opt_heap:
 536                         clear_opt(sbi, NOHEAP);
 537                         break;
 538 #ifdef CONFIG_F2FS_FS_XATTR
 539                 case Opt_user_xattr:
 540                         set_opt(sbi, XATTR_USER);
 541                         break;
 542                 case Opt_nouser_xattr:
 543                         clear_opt(sbi, XATTR_USER);
 544                         break;
 545                 case Opt_inline_xattr:
 546                         set_opt(sbi, INLINE_XATTR);
 547                         break;
 548                 case Opt_noinline_xattr:
 549                         clear_opt(sbi, INLINE_XATTR);
 550                         break;
 551                 case Opt_inline_xattr_size:
 552                         if (args->from && match_int(args, &arg))
 553                                 return -EINVAL;
 554                         set_opt(sbi, INLINE_XATTR_SIZE);
 555                         F2FS_OPTION(sbi).inline_xattr_size = arg;
 556                         break;
 557 #else
 558                 case Opt_user_xattr:
 559                         f2fs_info(sbi, "user_xattr options not supported");
 560                         break;
 561                 case Opt_nouser_xattr:
 562                         f2fs_info(sbi, "nouser_xattr options not supported");
 563                         break;
 564                 case Opt_inline_xattr:
 565                         f2fs_info(sbi, "inline_xattr options not supported");
 566                         break;
 567                 case Opt_noinline_xattr:
 568                         f2fs_info(sbi, "noinline_xattr options not supported");
 569                         break;
 570 #endif
 571 #ifdef CONFIG_F2FS_FS_POSIX_ACL
 572                 case Opt_acl:
 573                         set_opt(sbi, POSIX_ACL);
 574                         break;
 575                 case Opt_noacl:
 576                         clear_opt(sbi, POSIX_ACL);
 577                         break;
 578 #else
 579                 case Opt_acl:
 580                         f2fs_info(sbi, "acl options not supported");
 581                         break;
 582                 case Opt_noacl:
 583                         f2fs_info(sbi, "noacl options not supported");
 584                         break;
 585 #endif
 586                 case Opt_active_logs:
 587                         if (args->from && match_int(args, &arg))
 588                                 return -EINVAL;
 589                         if (arg != 2 && arg != 4 &&
 590                                 arg != NR_CURSEG_PERSIST_TYPE)
 591                                 return -EINVAL;
 592                         F2FS_OPTION(sbi).active_logs = arg;
 593                         break;
 594                 case Opt_disable_ext_identify:
 595                         set_opt(sbi, DISABLE_EXT_IDENTIFY);
 596                         break;
 597                 case Opt_inline_data:
 598                         set_opt(sbi, INLINE_DATA);
 599                         break;
 600                 case Opt_inline_dentry:
 601                         set_opt(sbi, INLINE_DENTRY);
 602                         break;
 603                 case Opt_noinline_dentry:
 604                         clear_opt(sbi, INLINE_DENTRY);
 605                         break;
 606                 case Opt_flush_merge:
 607                         set_opt(sbi, FLUSH_MERGE);
 608                         break;
 609                 case Opt_noflush_merge:
 610                         clear_opt(sbi, FLUSH_MERGE);
 611                         break;
 612                 case Opt_nobarrier:
 613                         set_opt(sbi, NOBARRIER);
 614                         break;
 615                 case Opt_fastboot:
 616                         set_opt(sbi, FASTBOOT);
 617                         break;
 618                 case Opt_extent_cache:
 619                         set_opt(sbi, EXTENT_CACHE);
 620                         break;
 621                 case Opt_noextent_cache:
 622                         clear_opt(sbi, EXTENT_CACHE);
 623                         break;
 624                 case Opt_noinline_data:
 625                         clear_opt(sbi, INLINE_DATA);
 626                         break;
 627                 case Opt_data_flush:
 628                         set_opt(sbi, DATA_FLUSH);
 629                         break;
 630                 case Opt_reserve_root:
 631                         if (args->from && match_int(args, &arg))
 632                                 return -EINVAL;
 633                         if (test_opt(sbi, RESERVE_ROOT)) {
 634                                 f2fs_info(sbi, "Preserve previous reserve_root=%u",
 635                                           F2FS_OPTION(sbi).root_reserved_blocks);
 636                         } else {
 637                                 F2FS_OPTION(sbi).root_reserved_blocks = arg;
 638                                 set_opt(sbi, RESERVE_ROOT);
 639                         }
 640                         break;
 641                 case Opt_resuid:
 642                         if (args->from && match_int(args, &arg))
 643                                 return -EINVAL;
 644                         uid = make_kuid(current_user_ns(), arg);
 645                         if (!uid_valid(uid)) {
 646                                 f2fs_err(sbi, "Invalid uid value %d", arg);
 647                                 return -EINVAL;
 648                         }
 649                         F2FS_OPTION(sbi).s_resuid = uid;
 650                         break;
 651                 case Opt_resgid:
 652                         if (args->from && match_int(args, &arg))
 653                                 return -EINVAL;
 654                         gid = make_kgid(current_user_ns(), arg);
 655                         if (!gid_valid(gid)) {
 656                                 f2fs_err(sbi, "Invalid gid value %d", arg);
 657                                 return -EINVAL;
 658                         }
 659                         F2FS_OPTION(sbi).s_resgid = gid;
 660                         break;
 661                 case Opt_mode:
 662                         name = match_strdup(&args[0]);
 663
 664                         if (!name)
 665                                 return -ENOMEM;
 666                         if (!strcmp(name, "adaptive")) {
 667                                 if (f2fs_sb_has_blkzoned(sbi)) {
 668                                         f2fs_warn(sbi, "adaptive mode is not allowed with zoned block device feature");
 669                                         kfree(name);
 670                                         return -EINVAL;
 671                                 }
 672                                 F2FS_OPTION(sbi).fs_mode = FS_MODE_ADAPTIVE;
 673                         } else if (!strcmp(name, "lfs")) {
 674                                 F2FS_OPTION(sbi).fs_mode = FS_MODE_LFS;
 675                         } else {
 676                                 kfree(name);
 677                                 return -EINVAL;
 678                         }
 679                         kfree(name);
 680                         break;
 681                 case Opt_io_size_bits:
 682                         if (args->from && match_int(args, &arg))
 683                                 return -EINVAL;
 684                         if (arg <= 0 || arg > __ilog2_u32(BIO_MAX_PAGES)) {
 685                                 f2fs_warn(sbi, "Not support %d, larger than %d",
 686                                           1 << arg, BIO_MAX_PAGES);
 687                                 return -EINVAL;
 688                         }
 689                         F2FS_OPTION(sbi).write_io_size_bits = arg;
 690                         break;
 691 #ifdef CONFIG_F2FS_FAULT_INJECTION
 692                 case Opt_fault_injection:
 693                         if (args->from && match_int(args, &arg))
 694                                 return -EINVAL;
 695                         f2fs_build_fault_attr(sbi, arg, F2FS_ALL_FAULT_TYPE);
 696                         set_opt(sbi, FAULT_INJECTION);
 697                         break;
 698
 699                 case Opt_fault_type:
 700                         if (args->from && match_int(args, &arg))
 701                                 return -EINVAL;
 702                         f2fs_build_fault_attr(sbi, 0, arg);
 703                         set_opt(sbi, FAULT_INJECTION);
 704                         break;
 705 #else
 706                 case Opt_fault_injection:
 707                         f2fs_info(sbi, "fault_injection options not supported");
 708                         break;
 709
 710                 case Opt_fault_type:
 711                         f2fs_info(sbi, "fault_type options not supported");
 712                         break;
 713 #endif
 714                 case Opt_lazytime:
 715                         sb->s_flags |= SB_LAZYTIME;
 716                         break;
 717                 case Opt_nolazytime:
 718                         sb->s_flags &= ~SB_LAZYTIME;
 719                         break;
 720 #ifdef CONFIG_QUOTA
 721                 case Opt_quota:
 722                 case Opt_usrquota:
 723                         set_opt(sbi, USRQUOTA);
 724                         break;
 725                 case Opt_grpquota:
 726                         set_opt(sbi, GRPQUOTA);
 727                         break;
 728                 case Opt_prjquota:
 729                         set_opt(sbi, PRJQUOTA);
 730                         break;
 731                 case Opt_usrjquota:
 732                         ret = f2fs_set_qf_name(sb, USRQUOTA, &args[0]);
 733                         if (ret)
 734                                 return ret;
 735                         break;
 736                 case Opt_grpjquota:
 737                         ret = f2fs_set_qf_name(sb, GRPQUOTA, &args[0]);
 738                         if (ret)
 739                                 return ret;
 740                         break;
 741                 case Opt_prjjquota:
 742                         ret = f2fs_set_qf_name(sb, PRJQUOTA, &args[0]);
 743                         if (ret)
 744                                 return ret;
 745                         break;
 746                 case Opt_offusrjquota:
 747                         ret = f2fs_clear_qf_name(sb, USRQUOTA);
 748                         if (ret)
 749                                 return ret;
 750                         break;
 751                 case Opt_offgrpjquota:
 752                         ret = f2fs_clear_qf_name(sb, GRPQUOTA);
 753                         if (ret)
 754                                 return ret;
 755                         break;
 756                 case Opt_offprjjquota:
 757                         ret = f2fs_clear_qf_name(sb, PRJQUOTA);
 758                         if (ret)
 759                                 return ret;
 760                         break;
 761                 case Opt_jqfmt_vfsold:
 762                         F2FS_OPTION(sbi).s_jquota_fmt = QFMT_VFS_OLD;
 763                         break;
 764                 case Opt_jqfmt_vfsv0:
 765                         F2FS_OPTION(sbi).s_jquota_fmt = QFMT_VFS_V0;
 766                         break;
 767                 case Opt_jqfmt_vfsv1:
 768                         F2FS_OPTION(sbi).s_jquota_fmt = QFMT_VFS_V1;
 769                         break;
 770                 case Opt_noquota:
 771                         clear_opt(sbi, QUOTA);
 772                         clear_opt(sbi, USRQUOTA);
 773                         clear_opt(sbi, GRPQUOTA);
 774                         clear_opt(sbi, PRJQUOTA);
 775                         break;
 776 #else
 777                 case Opt_quota:
 778                 case Opt_usrquota:
 779                 case Opt_grpquota:
 780                 case Opt_prjquota:
 781                 case Opt_usrjquota:
 782                 case Opt_grpjquota:
 783                 case Opt_prjjquota:
 784                 case Opt_offusrjquota:
 785                 case Opt_offgrpjquota:
 786                 case Opt_offprjjquota:
 787                 case Opt_jqfmt_vfsold:
 788                 case Opt_jqfmt_vfsv0:
 789                 case Opt_jqfmt_vfsv1:
 790                 case Opt_noquota:
 791                         f2fs_info(sbi, "quota operations not supported");
 792                         break;
 793 #endif
 794                 case Opt_whint:
 795                         name = match_strdup(&args[0]);
 796                         if (!name)
 797                                 return -ENOMEM;
 798                         if (!strcmp(name, "user-based")) {
 799                                 F2FS_OPTION(sbi).whint_mode = WHINT_MODE_USER;
 800                         } else if (!strcmp(name, "off")) {
 801                                 F2FS_OPTION(sbi).whint_mode = WHINT_MODE_OFF;
 802                         } else if (!strcmp(name, "fs-based")) {
 803                                 F2FS_OPTION(sbi).whint_mode = WHINT_MODE_FS;
 804                         } else {
 805                                 kfree(name);
 806                                 return -EINVAL;
 807                         }
 808                         kfree(name);
 809                         break;
 810                 case Opt_alloc:
 811                         name = match_strdup(&args[0]);
 812                         if (!name)
 813                                 return -ENOMEM;
 814
 815                         if (!strcmp(name, "default")) {
 816                                 F2FS_OPTION(sbi).alloc_mode = ALLOC_MODE_DEFAULT;
 817                         } else if (!strcmp(name, "reuse")) {
 818                                 F2FS_OPTION(sbi).alloc_mode = ALLOC_MODE_REUSE;
 819                         } else {
 820                                 kfree(name);
 821                                 return -EINVAL;
 822                         }
 823                         kfree(name);
 824                         break;
 825                 case Opt_fsync:
 826                         name = match_strdup(&args[0]);
 827                         if (!name)
 828                                 return -ENOMEM;
 829                         if (!strcmp(name, "posix")) {
 830                                 F2FS_OPTION(sbi).fsync_mode = FSYNC_MODE_POSIX;
 831                         } else if (!strcmp(name, "strict")) {
 832                                 F2FS_OPTION(sbi).fsync_mode = FSYNC_MODE_STRICT;
 833                         } else if (!strcmp(name, "nobarrier")) {
 834                                 F2FS_OPTION(sbi).fsync_mode =
 835                                                         FSYNC_MODE_NOBARRIER;
 836                         } else {
 837                                 kfree(name);
 838                                 return -EINVAL;
 839                         }
 840                         kfree(name);
 841                         break;
 842                 case Opt_test_dummy_encryption:
 843                         ret = f2fs_set_test_dummy_encryption(sb, p, &args[0],
 844                                                              is_remount);
 845                         if (ret)
 846                                 return ret;
 847                         break;
 848                 case Opt_inlinecrypt:
 849 #ifdef CONFIG_FS_ENCRYPTION_INLINE_CRYPT
 850                         sb->s_flags |= SB_INLINECRYPT;
 851 #else
 852                         f2fs_info(sbi, "inline encryption not supported");
 853 #endif
 854                         break;
 855                 case Opt_checkpoint_disable_cap_perc:
 856                         if (args->from && match_int(args, &arg))
 857                                 return -EINVAL;
 858                         if (arg < 0 || arg > 100)
 859                                 return -EINVAL;
 860                         F2FS_OPTION(sbi).unusable_cap_perc = arg;
 861                         set_opt(sbi, DISABLE_CHECKPOINT);
 862                         break;
 863                 case Opt_checkpoint_disable_cap:
 864                         if (args->from && match_int(args, &arg))
 865                                 return -EINVAL;
 866                         F2FS_OPTION(sbi).unusable_cap = arg;
 867                         set_opt(sbi, DISABLE_CHECKPOINT);
 868                         break;
 869                 case Opt_checkpoint_disable:
 870                         set_opt(sbi, DISABLE_CHECKPOINT);
 871                         break;
 872                 case Opt_checkpoint_enable:
 873                         clear_opt(sbi, DISABLE_CHECKPOINT);
 874                         break;
 875 #ifdef CONFIG_F2FS_FS_COMPRESSION
 876                 case Opt_compress_algorithm:
 877                         if (!f2fs_sb_has_compression(sbi)) {
 878                                 f2fs_info(sbi, "Image doesn't support compression");
 879                                 break;
 880                         }
 881                         name = match_strdup(&args[0]);
 882                         if (!name)
 883                                 return -ENOMEM;
 884                         if (!strcmp(name, "lzo")) {
 885                                 F2FS_OPTION(sbi).compress_algorithm =
 886                                                                 COMPRESS_LZO;
 887                         } else if (!strcmp(name, "lz4")) {
 888                                 F2FS_OPTION(sbi).compress_algorithm =
 889                                                                 COMPRESS_LZ4;
 890                         } else if (!strcmp(name, "zstd")) {
 891                                 F2FS_OPTION(sbi).compress_algorithm =
 892                                                                 COMPRESS_ZSTD;
 893                         } else if (!strcmp(name, "lzo-rle")) {
 894                                 F2FS_OPTION(sbi).compress_algorithm =
 895                                                                 COMPRESS_LZORLE;
 896                         } else {
 897                                 kfree(name);
 898                                 return -EINVAL;
 899                         }
 900                         kfree(name);
 901                         break;
 902                 case Opt_compress_log_size:
 903                         if (!f2fs_sb_has_compression(sbi)) {
 904                                 f2fs_info(sbi, "Image doesn't support compression");
 905                                 break;
 906                         }
 907                         if (args->from && match_int(args, &arg))
 908                                 return -EINVAL;
 909                         if (arg < MIN_COMPRESS_LOG_SIZE ||
 910                                 arg > MAX_COMPRESS_LOG_SIZE) {
 911                                 f2fs_err(sbi,
 912                                         "Compress cluster log size is out of range");
 913                                 return -EINVAL;
 914                         }
 915                         F2FS_OPTION(sbi).compress_log_size = arg;
 916                         break;
 917                 case Opt_compress_extension:
 918                         if (!f2fs_sb_has_compression(sbi)) {
 919                                 f2fs_info(sbi, "Image doesn't support compression");
 920                                 break;
 921                         }
 922                         name = match_strdup(&args[0]);
 923                         if (!name)
 924                                 return -ENOMEM;
 925
 926                         ext = F2FS_OPTION(sbi).extensions;
 927                         ext_cnt = F2FS_OPTION(sbi).compress_ext_cnt;
 928
 929                         if (strlen(name) >= F2FS_EXTENSION_LEN ||
 930                                 ext_cnt >= COMPRESS_EXT_NUM) {
 931                                 f2fs_err(sbi,
 932                                         "invalid extension length/number");
 933                                 kfree(name);
 934                                 return -EINVAL;
 935                         }
 936
 937                         strcpy(ext[ext_cnt], name);
 938                         F2FS_OPTION(sbi).compress_ext_cnt++;
 939                         kfree(name);
 940                         break;
 941                 case Opt_compress_chksum:
 942                         F2FS_OPTION(sbi).compress_chksum = true;
 943                         break;
 944                 case Opt_compress_mode:
 945                         name = match_strdup(&args[0]);
 946                         if (!name)
 947                                 return -ENOMEM;
 948                         if (!strcmp(name, "fs")) {
 949                                 F2FS_OPTION(sbi).compress_mode = COMPR_MODE_FS;
 950                         } else if (!strcmp(name, "user")) {
 951                                 F2FS_OPTION(sbi).compress_mode = COMPR_MODE_USER;
 952                         } else {
 953                                 kfree(name);
 954                                 return -EINVAL;
 955                         }
 956                         kfree(name);
 957                         break;
 958 #else
 959                 case Opt_compress_algorithm:
 960                 case Opt_compress_log_size:
 961                 case Opt_compress_extension:
 962                 case Opt_compress_chksum:
 963                 case Opt_compress_mode:
 964                         f2fs_info(sbi, "compression options not supported");
 965                         break;
 966 #endif
 967                 case Opt_atgc:
 968                         set_opt(sbi, ATGC);
 969                         break;
 970                 default:
 971                         f2fs_err(sbi, "Unrecognized mount option \"%s\" or missing value",
 972                                  p);
 973                         return -EINVAL;
 974                 }
 975         }
 976 #ifdef CONFIG_QUOTA
 977         if (f2fs_check_quota_options(sbi))
 978                 return -EINVAL;
 979 #else
 980         if (f2fs_sb_has_quota_ino(sbi) && !f2fs_readonly(sbi->sb)) {
 981                 f2fs_info(sbi, "Filesystem with quota feature cannot be mounted RDWR without CONFIG_QUOTA");
 982                 return -EINVAL;
 983         }
 984         if (f2fs_sb_has_project_quota(sbi) && !f2fs_readonly(sbi->sb)) {
 985                 f2fs_err(sbi, "Filesystem with project quota feature cannot be mounted RDWR without CONFIG_QUOTA");
 986                 return -EINVAL;
 987         }
 988 #endif
 989 #ifndef CONFIG_UNICODE
 990         if (f2fs_sb_has_casefold(sbi)) {
 991                 f2fs_err(sbi,
 992                         "Filesystem with casefold feature cannot be mounted without CONFIG_UNICODE");
 993                 return -EINVAL;
 994         }
 995 #endif
 996         /*
 997          * The BLKZONED feature indicates that the drive was formatted with
 998          * zone alignment optimization. This is optional for host-aware
 999          * devices, but mandatory for host-managed zoned block devices.
1000          */
1001 #ifndef CONFIG_BLK_DEV_ZONED
1002         if (f2fs_sb_has_blkzoned(sbi)) {
1003                 f2fs_err(sbi, "Zoned block device support is not enabled");
1004                 return -EINVAL;
1005         }
1006 #endif
1007
1008         if (F2FS_IO_SIZE_BITS(sbi) && !f2fs_lfs_mode(sbi)) {
1009                 f2fs_err(sbi, "Should set mode=lfs with %uKB-sized IO",
1010                          F2FS_IO_SIZE_KB(sbi));
1011                 return -EINVAL;
1012         }
1013
1014         if (test_opt(sbi, INLINE_XATTR_SIZE)) {
1015                 int min_size, max_size;
1016
1017                 if (!f2fs_sb_has_extra_attr(sbi) ||
1018                         !f2fs_sb_has_flexible_inline_xattr(sbi)) {
1019                         f2fs_err(sbi, "extra_attr or flexible_inline_xattr feature is off");
1020                         return -EINVAL;
1021                 }
1022                 if (!test_opt(sbi, INLINE_XATTR)) {
1023                         f2fs_err(sbi, "inline_xattr_size option should be set with inline_xattr option");
1024                         return -EINVAL;
1025                 }
1026
1027                 min_size = sizeof(struct f2fs_xattr_header) / sizeof(__le32);
1028                 max_size = MAX_INLINE_XATTR_SIZE;
1029
1030                 if (F2FS_OPTION(sbi).inline_xattr_size < min_size ||
1031                                 F2FS_OPTION(sbi).inline_xattr_size > max_size) {
1032                         f2fs_err(sbi, "inline xattr size is out of range: %d ~ %d",
1033                                  min_size, max_size);
1034                         return -EINVAL;
1035                 }
1036         }
1037
1038         if (test_opt(sbi, DISABLE_CHECKPOINT) && f2fs_lfs_mode(sbi)) {
1039                 f2fs_err(sbi, "LFS not compatible with checkpoint=disable\n");
1040                 return -EINVAL;
1041         }
1042
1043         /* Not pass down write hints if the number of active logs is lesser
1044          * than NR_CURSEG_PERSIST_TYPE.
1045          */
1046         if (F2FS_OPTION(sbi).active_logs != NR_CURSEG_TYPE)
1047                 F2FS_OPTION(sbi).whint_mode = WHINT_MODE_OFF;
1048         return 0;
1049 }
1050
1051 static struct inode *f2fs_alloc_inode(struct super_block *sb)
1052 {
1053         struct f2fs_inode_info *fi;
1054
1055         fi = kmem_cache_alloc(f2fs_inode_cachep, GFP_F2FS_ZERO);
1056         if (!fi)
1057                 return NULL;
1058
1059         init_once((void *) fi);
1060
1061         /* Initialize f2fs-specific inode info */
1062         atomic_set(&fi->dirty_pages, 0);
1063         atomic_set(&fi->i_compr_blocks, 0);
1064         init_rwsem(&fi->i_sem);
1065         spin_lock_init(&fi->i_size_lock);
1066         INIT_LIST_HEAD(&fi->dirty_list);
1067         INIT_LIST_HEAD(&fi->gdirty_list);
1068         INIT_LIST_HEAD(&fi->inmem_ilist);
1069         INIT_LIST_HEAD(&fi->inmem_pages);
1070         mutex_init(&fi->inmem_lock);
1071         init_rwsem(&fi->i_gc_rwsem[READ]);
1072         init_rwsem(&fi->i_gc_rwsem[WRITE]);
1073         init_rwsem(&fi->i_mmap_sem);
1074         init_rwsem(&fi->i_xattr_sem);
1075
1076         /* Will be used by directory only */
1077         fi->i_dir_level = F2FS_SB(sb)->dir_level;
1078
1079         fi->ra_offset = -1;
1080
1081         return &fi->vfs_inode;
1082 }
1083
1084 static int f2fs_drop_inode(struct inode *inode)
1085 {
1086         struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
1087         int ret;
1088
1089         /*
1090          * during filesystem shutdown, if checkpoint is disabled,
1091          * drop useless meta/node dirty pages.
1092          */
1093         if (unlikely(is_sbi_flag_set(sbi, SBI_CP_DISABLED))) {
1094                 if (inode->i_ino == F2FS_NODE_INO(sbi) ||
1095                         inode->i_ino == F2FS_META_INO(sbi)) {
1096                         trace_f2fs_drop_inode(inode, 1);
1097                         return 1;
1098                 }
1099         }
1100
1101         /*
1102          * This is to avoid a deadlock condition like below.
1103          * writeback_single_inode(inode)
1104          *  - f2fs_write_data_page
1105          *    - f2fs_gc -> iput -> evict
1106          *       - inode_wait_for_writeback(inode)
1107          */
1108         if ((!inode_unhashed(inode) && inode->i_state & I_SYNC)) {
1109                 if (!inode->i_nlink && !is_bad_inode(inode)) {
1110                         /* to avoid evict_inode call simultaneously */
1111                         atomic_inc(&inode->i_count);
1112                         spin_unlock(&inode->i_lock);
1113
1114                         /* some remained atomic pages should discarded */
1115                         if (f2fs_is_atomic_file(inode))
1116                                 f2fs_drop_inmem_pages(inode);
1117
1118                         /* should remain fi->extent_tree for writepage */
1119                         f2fs_destroy_extent_node(inode);
1120
1121                         sb_start_intwrite(inode->i_sb);
1122                         f2fs_i_size_write(inode, 0);
1123
1124                         f2fs_submit_merged_write_cond(F2FS_I_SB(inode),
1125                                         inode, NULL, 0, DATA);
1126                         truncate_inode_pages_final(inode->i_mapping);
1127
1128                         if (F2FS_HAS_BLOCKS(inode))
1129                                 f2fs_truncate(inode);
1130
1131                         sb_end_intwrite(inode->i_sb);
1132
1133                         spin_lock(&inode->i_lock);
1134                         atomic_dec(&inode->i_count);
1135                 }
1136                 trace_f2fs_drop_inode(inode, 0);
1137                 return 0;
1138         }
1139         ret = generic_drop_inode(inode);
1140         if (!ret)
1141                 ret = fscrypt_drop_inode(inode);
1142         trace_f2fs_drop_inode(inode, ret);
1143         return ret;
1144 }
1145
1146 int f2fs_inode_dirtied(struct inode *inode, bool sync)
1147 {
1148         struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
1149         int ret = 0;
1150
1151         spin_lock(&sbi->inode_lock[DIRTY_META]);
1152         if (is_inode_flag_set(inode, FI_DIRTY_INODE)) {
1153                 ret = 1;
1154         } else {
1155                 set_inode_flag(inode, FI_DIRTY_INODE);
1156                 stat_inc_dirty_inode(sbi, DIRTY_META);
1157         }
1158         if (sync && list_empty(&F2FS_I(inode)->gdirty_list)) {
1159                 list_add_tail(&F2FS_I(inode)->gdirty_list,
1160                                 &sbi->inode_list[DIRTY_META]);
1161                 inc_page_count(sbi, F2FS_DIRTY_IMETA);
1162         }
1163         spin_unlock(&sbi->inode_lock[DIRTY_META]);
1164         return ret;
1165 }
1166
1167 void f2fs_inode_synced(struct inode *inode)
1168 {
1169         struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
1170
1171         spin_lock(&sbi->inode_lock[DIRTY_META]);
1172         if (!is_inode_flag_set(inode, FI_DIRTY_INODE)) {
1173                 spin_unlock(&sbi->inode_lock[DIRTY_META]);
1174                 return;
1175         }
1176         if (!list_empty(&F2FS_I(inode)->gdirty_list)) {
1177                 list_del_init(&F2FS_I(inode)->gdirty_list);
1178                 dec_page_count(sbi, F2FS_DIRTY_IMETA);
1179         }
1180         clear_inode_flag(inode, FI_DIRTY_INODE);
1181         clear_inode_flag(inode, FI_AUTO_RECOVER);
1182         stat_dec_dirty_inode(F2FS_I_SB(inode), DIRTY_META);
1183         spin_unlock(&sbi->inode_lock[DIRTY_META]);
1184 }
1185
1186 /*
1187  * f2fs_dirty_inode() is called from __mark_inode_dirty()
1188  *
1189  * We should call set_dirty_inode to write the dirty inode through write_inode.
1190  */
1191 static void f2fs_dirty_inode(struct inode *inode, int flags)
1192 {
1193         struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
1194
1195         if (inode->i_ino == F2FS_NODE_INO(sbi) ||
1196                         inode->i_ino == F2FS_META_INO(sbi))
1197                 return;
1198
1199         if (flags == I_DIRTY_TIME)
1200                 return;
1201
1202         if (is_inode_flag_set(inode, FI_AUTO_RECOVER))
1203                 clear_inode_flag(inode, FI_AUTO_RECOVER);
1204
1205         f2fs_inode_dirtied(inode, false);
1206 }
1207
1208 static void f2fs_free_inode(struct inode *inode)
1209 {
1210         fscrypt_free_inode(inode);
1211         kmem_cache_free(f2fs_inode_cachep, F2FS_I(inode));
1212 }
1213
1214 static void destroy_percpu_info(struct f2fs_sb_info *sbi)
1215 {
1216         percpu_counter_destroy(&sbi->alloc_valid_block_count);
1217         percpu_counter_destroy(&sbi->total_valid_inode_count);
1218 }
1219
1220 static void destroy_device_list(struct f2fs_sb_info *sbi)
1221 {
1222         int i;
1223
1224         for (i = 0; i < sbi->s_ndevs; i++) {
1225                 blkdev_put(FDEV(i).bdev, FMODE_EXCL);
1226 #ifdef CONFIG_BLK_DEV_ZONED
1227                 kvfree(FDEV(i).blkz_seq);
1228                 kfree(FDEV(i).zone_capacity_blocks);
1229 #endif
1230         }
1231         kvfree(sbi->devs);
1232 }
1233
1234 static void f2fs_put_super(struct super_block *sb)
1235 {
1236         struct f2fs_sb_info *sbi = F2FS_SB(sb);
1237         int i;
1238         bool dropped;
1239
1240         /* unregister procfs/sysfs entries in advance to avoid race case */
1241         f2fs_unregister_sysfs(sbi);
1242
1243         f2fs_quota_off_umount(sb);
1244
1245         /* prevent remaining shrinker jobs */
1246         mutex_lock(&sbi->umount_mutex);
1247
1248         /*
1249          * We don't need to do checkpoint when superblock is clean.
1250          * But, the previous checkpoint was not done by umount, it needs to do
1251          * clean checkpoint again.
1252          */
1253         if ((is_sbi_flag_set(sbi, SBI_IS_DIRTY) ||
1254                         !is_set_ckpt_flags(sbi, CP_UMOUNT_FLAG))) {
1255                 struct cp_control cpc = {
1256                         .reason = CP_UMOUNT,
1257                 };
1258                 f2fs_write_checkpoint(sbi, &cpc);
1259         }
1260
1261         /* be sure to wait for any on-going discard commands */
1262         dropped = f2fs_issue_discard_timeout(sbi);
1263
1264         if ((f2fs_hw_support_discard(sbi) || f2fs_hw_should_discard(sbi)) &&
1265                                         !sbi->discard_blks && !dropped) {
1266                 struct cp_control cpc = {
1267                         .reason = CP_UMOUNT | CP_TRIMMED,
1268                 };
1269                 f2fs_write_checkpoint(sbi, &cpc);
1270         }
1271
1272         /*
1273          * normally superblock is clean, so we need to release this.
1274          * In addition, EIO will skip do checkpoint, we need this as well.
1275          */
1276         f2fs_release_ino_entry(sbi, true);
1277
1278         f2fs_leave_shrinker(sbi);
1279         mutex_unlock(&sbi->umount_mutex);
1280
1281         /* our cp_error case, we can wait for any writeback page */
1282         f2fs_flush_merged_writes(sbi);
1283
1284         f2fs_wait_on_all_pages(sbi, F2FS_WB_CP_DATA);
1285
1286         f2fs_bug_on(sbi, sbi->fsync_node_num);
1287
1288         iput(sbi->node_inode);
1289         sbi->node_inode = NULL;
1290
1291         iput(sbi->meta_inode);
1292         sbi->meta_inode = NULL;
1293
1294         /*
1295          * iput() can update stat information, if f2fs_write_checkpoint()
1296          * above failed with error.
1297          */
1298         f2fs_destroy_stats(sbi);
1299
1300         /* destroy f2fs internal modules */
1301         f2fs_destroy_node_manager(sbi);
1302         f2fs_destroy_segment_manager(sbi);
1303
1304         f2fs_destroy_post_read_wq(sbi);
1305
1306         kvfree(sbi->ckpt);
1307
1308         sb->s_fs_info = NULL;
1309         if (sbi->s_chksum_driver)
1310                 crypto_free_shash(sbi->s_chksum_driver);
1311         kfree(sbi->raw_super);
1312
1313         destroy_device_list(sbi);
1314         f2fs_destroy_page_array_cache(sbi);
1315         f2fs_destroy_xattr_caches(sbi);
1316         mempool_destroy(sbi->write_io_dummy);
1317 #ifdef CONFIG_QUOTA
1318         for (i = 0; i < MAXQUOTAS; i++)
1319                 kfree(F2FS_OPTION(sbi).s_qf_names[i]);
1320 #endif
1321         fscrypt_free_dummy_policy(&F2FS_OPTION(sbi).dummy_enc_policy);
1322         destroy_percpu_info(sbi);
1323         for (i = 0; i < NR_PAGE_TYPE; i++)
1324                 kvfree(sbi->write_io[i]);
1325 #ifdef CONFIG_UNICODE
1326         utf8_unload(sb->s_encoding);
1327 #endif
1328         kfree(sbi);
1329 }
1330
1331 int f2fs_sync_fs(struct super_block *sb, int sync)
1332 {
1333         struct f2fs_sb_info *sbi = F2FS_SB(sb);
1334         int err = 0;
1335
1336         if (unlikely(f2fs_cp_error(sbi)))
1337                 return 0;
1338         if (unlikely(is_sbi_flag_set(sbi, SBI_CP_DISABLED)))
1339                 return 0;
1340
1341         trace_f2fs_sync_fs(sb, sync);
1342
1343         if (unlikely(is_sbi_flag_set(sbi, SBI_POR_DOING)))
1344                 return -EAGAIN;
1345
1346         if (sync) {
1347                 struct cp_control cpc;
1348
1349                 cpc.reason = __get_cp_reason(sbi);
1350
1351                 down_write(&sbi->gc_lock);
1352                 err = f2fs_write_checkpoint(sbi, &cpc);
1353                 up_write(&sbi->gc_lock);
1354         }
1355         f2fs_trace_ios(NULL, 1);
1356
1357         return err;
1358 }
1359
1360 static int f2fs_freeze(struct super_block *sb)
1361 {
1362         if (f2fs_readonly(sb))
1363                 return 0;
1364
1365         /* IO error happened before */
1366         if (unlikely(f2fs_cp_error(F2FS_SB(sb))))
1367                 return -EIO;
1368
1369         /* must be clean, since sync_filesystem() was already called */
1370         if (is_sbi_flag_set(F2FS_SB(sb), SBI_IS_DIRTY))
1371                 return -EINVAL;
1372         return 0;
1373 }
1374
1375 static int f2fs_unfreeze(struct super_block *sb)
1376 {
1377         return 0;
1378 }
1379
1380 #ifdef CONFIG_QUOTA
1381 static int f2fs_statfs_project(struct super_block *sb,
1382                                 kprojid_t projid, struct kstatfs *buf)
1383 {
1384         struct kqid qid;
1385         struct dquot *dquot;
1386         u64 limit;
1387         u64 curblock;
1388
1389         qid = make_kqid_projid(projid);
1390         dquot = dqget(sb, qid);
1391         if (IS_ERR(dquot))
1392                 return PTR_ERR(dquot);
1393         spin_lock(&dquot->dq_dqb_lock);
1394
1395         limit = min_not_zero(dquot->dq_dqb.dqb_bsoftlimit,
1396                                         dquot->dq_dqb.dqb_bhardlimit);
1397         if (limit)
1398                 limit >>= sb->s_blocksize_bits;
1399
1400         if (limit && buf->f_blocks > limit) {
1401                 curblock = (dquot->dq_dqb.dqb_curspace +
1402                             dquot->dq_dqb.dqb_rsvspace) >> sb->s_blocksize_bits;
1403                 buf->f_blocks = limit;
1404                 buf->f_bfree = buf->f_bavail =
1405                         (buf->f_blocks > curblock) ?
1406                          (buf->f_blocks - curblock) : 0;
1407         }
1408
1409         limit = min_not_zero(dquot->dq_dqb.dqb_isoftlimit,
1410                                         dquot->dq_dqb.dqb_ihardlimit);
1411
1412         if (limit && buf->f_files > limit) {
1413                 buf->f_files = limit;
1414                 buf->f_ffree =
1415                         (buf->f_files > dquot->dq_dqb.dqb_curinodes) ?
1416                          (buf->f_files - dquot->dq_dqb.dqb_curinodes) : 0;
1417         }
1418
1419         spin_unlock(&dquot->dq_dqb_lock);
1420         dqput(dquot);
1421         return 0;
1422 }
1423 #endif
1424
1425 static int f2fs_statfs(struct dentry *dentry, struct kstatfs *buf)
1426 {
1427         struct super_block *sb = dentry->d_sb;
1428         struct f2fs_sb_info *sbi = F2FS_SB(sb);
1429         u64 id = huge_encode_dev(sb->s_bdev->bd_dev);
1430         block_t total_count, user_block_count, start_count;
1431         u64 avail_node_count;
1432
1433         total_count = le64_to_cpu(sbi->raw_super->block_count);
1434         user_block_count = sbi->user_block_count;
1435         start_count = le32_to_cpu(sbi->raw_super->segment0_blkaddr);
1436         buf->f_type = F2FS_SUPER_MAGIC;
1437         buf->f_bsize = sbi->blocksize;
1438
1439         buf->f_blocks = total_count - start_count;
1440         buf->f_bfree = user_block_count - valid_user_blocks(sbi) -
1441                                                 sbi->current_reserved_blocks;
1442
1443         spin_lock(&sbi->stat_lock);
1444         if (unlikely(buf->f_bfree <= sbi->unusable_block_count))
1445                 buf->f_bfree = 0;
1446         else
1447                 buf->f_bfree -= sbi->unusable_block_count;
1448         spin_unlock(&sbi->stat_lock);
1449
1450         if (buf->f_bfree > F2FS_OPTION(sbi).root_reserved_blocks)
1451                 buf->f_bavail = buf->f_bfree -
1452                                 F2FS_OPTION(sbi).root_reserved_blocks;
1453         else
1454                 buf->f_bavail = 0;
1455
1456         avail_node_count = sbi->total_node_count - F2FS_RESERVED_NODE_NUM;
1457
1458         if (avail_node_count > user_block_count) {
1459                 buf->f_files = user_block_count;
1460                 buf->f_ffree = buf->f_bavail;
1461         } else {
1462                 buf->f_files = avail_node_count;
1463                 buf->f_ffree = min(avail_node_count - valid_node_count(sbi),
1464                                         buf->f_bavail);
1465         }
1466
1467         buf->f_namelen = F2FS_NAME_LEN;
1468         buf->f_fsid    = u64_to_fsid(id);
1469
1470 #ifdef CONFIG_QUOTA
1471         if (is_inode_flag_set(dentry->d_inode, FI_PROJ_INHERIT) &&
1472                         sb_has_quota_limits_enabled(sb, PRJQUOTA)) {
1473                 f2fs_statfs_project(sb, F2FS_I(dentry->d_inode)->i_projid, buf);
1474         }
1475 #endif
1476         return 0;
1477 }
1478
1479 static inline void f2fs_show_quota_options(struct seq_file *seq,
1480                                            struct super_block *sb)
1481 {
1482 #ifdef CONFIG_QUOTA
1483         struct f2fs_sb_info *sbi = F2FS_SB(sb);
1484
1485         if (F2FS_OPTION(sbi).s_jquota_fmt) {
1486                 char *fmtname = "";
1487
1488                 switch (F2FS_OPTION(sbi).s_jquota_fmt) {
1489                 case QFMT_VFS_OLD:
1490                         fmtname = "vfsold";
1491                         break;
1492                 case QFMT_VFS_V0:
1493                         fmtname = "vfsv0";
1494                         break;
1495                 case QFMT_VFS_V1:
1496                         fmtname = "vfsv1";
1497                         break;
1498                 }
1499                 seq_printf(seq, ",jqfmt=%s", fmtname);
1500         }
1501
1502         if (F2FS_OPTION(sbi).s_qf_names[USRQUOTA])
1503                 seq_show_option(seq, "usrjquota",
1504                         F2FS_OPTION(sbi).s_qf_names[USRQUOTA]);
1505
1506         if (F2FS_OPTION(sbi).s_qf_names[GRPQUOTA])
1507                 seq_show_option(seq, "grpjquota",
1508                         F2FS_OPTION(sbi).s_qf_names[GRPQUOTA]);
1509
1510         if (F2FS_OPTION(sbi).s_qf_names[PRJQUOTA])
1511                 seq_show_option(seq, "prjjquota",
1512                         F2FS_OPTION(sbi).s_qf_names[PRJQUOTA]);
1513 #endif
1514 }
1515
1516 static inline void f2fs_show_compress_options(struct seq_file *seq,
1517                                                         struct super_block *sb)
1518 {
1519         struct f2fs_sb_info *sbi = F2FS_SB(sb);
1520         char *algtype = "";
1521         int i;
1522
1523         if (!f2fs_sb_has_compression(sbi))
1524                 return;
1525
1526         switch (F2FS_OPTION(sbi).compress_algorithm) {
1527         case COMPRESS_LZO:
1528                 algtype = "lzo";
1529                 break;
1530         case COMPRESS_LZ4:
1531                 algtype = "lz4";
1532                 break;
1533         case COMPRESS_ZSTD:
1534                 algtype = "zstd";
1535                 break;
1536         case COMPRESS_LZORLE:
1537                 algtype = "lzo-rle";
1538                 break;
1539         }
1540         seq_printf(seq, ",compress_algorithm=%s", algtype);
1541
1542         seq_printf(seq, ",compress_log_size=%u",
1543                         F2FS_OPTION(sbi).compress_log_size);
1544
1545         for (i = 0; i < F2FS_OPTION(sbi).compress_ext_cnt; i++) {
1546                 seq_printf(seq, ",compress_extension=%s",
1547                         F2FS_OPTION(sbi).extensions[i]);
1548         }
1549
1550         if (F2FS_OPTION(sbi).compress_chksum)
1551                 seq_puts(seq, ",compress_chksum");
1552
1553         if (F2FS_OPTION(sbi).compress_mode == COMPR_MODE_FS)
1554                 seq_printf(seq, ",compress_mode=%s", "fs");
1555         else if (F2FS_OPTION(sbi).compress_mode == COMPR_MODE_USER)
1556                 seq_printf(seq, ",compress_mode=%s", "user");
1557 }
1558
1559 static int f2fs_show_options(struct seq_file *seq, struct dentry *root)
1560 {
1561         struct f2fs_sb_info *sbi = F2FS_SB(root->d_sb);
1562
1563         if (F2FS_OPTION(sbi).bggc_mode == BGGC_MODE_SYNC)
1564                 seq_printf(seq, ",background_gc=%s", "sync");
1565         else if (F2FS_OPTION(sbi).bggc_mode == BGGC_MODE_ON)
1566                 seq_printf(seq, ",background_gc=%s", "on");
1567         else if (F2FS_OPTION(sbi).bggc_mode == BGGC_MODE_OFF)
1568                 seq_printf(seq, ",background_gc=%s", "off");
1569
1570         if (test_opt(sbi, DISABLE_ROLL_FORWARD))
1571                 seq_puts(seq, ",disable_roll_forward");
1572         if (test_opt(sbi, NORECOVERY))
1573                 seq_puts(seq, ",norecovery");
1574         if (test_opt(sbi, DISCARD))
1575                 seq_puts(seq, ",discard");
1576         else
1577                 seq_puts(seq, ",nodiscard");
1578         if (test_opt(sbi, NOHEAP))
1579                 seq_puts(seq, ",no_heap");
1580         else
1581                 seq_puts(seq, ",heap");
1582 #ifdef CONFIG_F2FS_FS_XATTR
1583         if (test_opt(sbi, XATTR_USER))
1584                 seq_puts(seq, ",user_xattr");
1585         else
1586                 seq_puts(seq, ",nouser_xattr");
1587         if (test_opt(sbi, INLINE_XATTR))
1588                 seq_puts(seq, ",inline_xattr");
1589         else
1590                 seq_puts(seq, ",noinline_xattr");
1591         if (test_opt(sbi, INLINE_XATTR_SIZE))
1592                 seq_printf(seq, ",inline_xattr_size=%u",
1593                                         F2FS_OPTION(sbi).inline_xattr_size);
1594 #endif
1595 #ifdef CONFIG_F2FS_FS_POSIX_ACL
1596         if (test_opt(sbi, POSIX_ACL))
1597                 seq_puts(seq, ",acl");
1598         else
1599                 seq_puts(seq, ",noacl");
1600 #endif
1601         if (test_opt(sbi, DISABLE_EXT_IDENTIFY))
1602                 seq_puts(seq, ",disable_ext_identify");
1603         if (test_opt(sbi, INLINE_DATA))
1604                 seq_puts(seq, ",inline_data");
1605         else
1606                 seq_puts(seq, ",noinline_data");
1607         if (test_opt(sbi, INLINE_DENTRY))
1608                 seq_puts(seq, ",inline_dentry");
1609         else
1610                 seq_puts(seq, ",noinline_dentry");
1611         if (!f2fs_readonly(sbi->sb) && test_opt(sbi, FLUSH_MERGE))
1612                 seq_puts(seq, ",flush_merge");
1613         if (test_opt(sbi, NOBARRIER))
1614                 seq_puts(seq, ",nobarrier");
1615         if (test_opt(sbi, FASTBOOT))
1616                 seq_puts(seq, ",fastboot");
1617         if (test_opt(sbi, EXTENT_CACHE))
1618                 seq_puts(seq, ",extent_cache");
1619         else
1620                 seq_puts(seq, ",noextent_cache");
1621         if (test_opt(sbi, DATA_FLUSH))
1622                 seq_puts(seq, ",data_flush");
1623
1624         seq_puts(seq, ",mode=");
1625         if (F2FS_OPTION(sbi).fs_mode == FS_MODE_ADAPTIVE)
1626                 seq_puts(seq, "adaptive");
1627         else if (F2FS_OPTION(sbi).fs_mode == FS_MODE_LFS)
1628                 seq_puts(seq, "lfs");
1629         seq_printf(seq, ",active_logs=%u", F2FS_OPTION(sbi).active_logs);
1630         if (test_opt(sbi, RESERVE_ROOT))
1631                 seq_printf(seq, ",reserve_root=%u,resuid=%u,resgid=%u",
1632                                 F2FS_OPTION(sbi).root_reserved_blocks,
1633                                 from_kuid_munged(&init_user_ns,
1634                                         F2FS_OPTION(sbi).s_resuid),
1635                                 from_kgid_munged(&init_user_ns,
1636                                         F2FS_OPTION(sbi).s_resgid));
1637         if (F2FS_IO_SIZE_BITS(sbi))
1638                 seq_printf(seq, ",io_bits=%u",
1639                                 F2FS_OPTION(sbi).write_io_size_bits);
1640 #ifdef CONFIG_F2FS_FAULT_INJECTION
1641         if (test_opt(sbi, FAULT_INJECTION)) {
1642                 seq_printf(seq, ",fault_injection=%u",
1643                                 F2FS_OPTION(sbi).fault_info.inject_rate);
1644                 seq_printf(seq, ",fault_type=%u",
1645                                 F2FS_OPTION(sbi).fault_info.inject_type);
1646         }
1647 #endif
1648 #ifdef CONFIG_QUOTA
1649         if (test_opt(sbi, QUOTA))
1650                 seq_puts(seq, ",quota");
1651         if (test_opt(sbi, USRQUOTA))
1652                 seq_puts(seq, ",usrquota");
1653         if (test_opt(sbi, GRPQUOTA))
1654                 seq_puts(seq, ",grpquota");
1655         if (test_opt(sbi, PRJQUOTA))
1656                 seq_puts(seq, ",prjquota");
1657 #endif
1658         f2fs_show_quota_options(seq, sbi->sb);
1659         if (F2FS_OPTION(sbi).whint_mode == WHINT_MODE_USER)
1660                 seq_printf(seq, ",whint_mode=%s", "user-based");
1661         else if (F2FS_OPTION(sbi).whint_mode == WHINT_MODE_FS)
1662                 seq_printf(seq, ",whint_mode=%s", "fs-based");
1663
1664         fscrypt_show_test_dummy_encryption(seq, ',', sbi->sb);
1665
1666         if (sbi->sb->s_flags & SB_INLINECRYPT)
1667                 seq_puts(seq, ",inlinecrypt");
1668
1669         if (F2FS_OPTION(sbi).alloc_mode == ALLOC_MODE_DEFAULT)
1670                 seq_printf(seq, ",alloc_mode=%s", "default");
1671         else if (F2FS_OPTION(sbi).alloc_mode == ALLOC_MODE_REUSE)
1672                 seq_printf(seq, ",alloc_mode=%s", "reuse");
1673
1674         if (test_opt(sbi, DISABLE_CHECKPOINT))
1675                 seq_printf(seq, ",checkpoint=disable:%u",
1676                                 F2FS_OPTION(sbi).unusable_cap);
1677         if (F2FS_OPTION(sbi).fsync_mode == FSYNC_MODE_POSIX)
1678                 seq_printf(seq, ",fsync_mode=%s", "posix");
1679         else if (F2FS_OPTION(sbi).fsync_mode == FSYNC_MODE_STRICT)
1680                 seq_printf(seq, ",fsync_mode=%s", "strict");
1681         else if (F2FS_OPTION(sbi).fsync_mode == FSYNC_MODE_NOBARRIER)
1682                 seq_printf(seq, ",fsync_mode=%s", "nobarrier");
1683
1684 #ifdef CONFIG_F2FS_FS_COMPRESSION
1685         f2fs_show_compress_options(seq, sbi->sb);
1686 #endif
1687
1688         if (test_opt(sbi, ATGC))
1689                 seq_puts(seq, ",atgc");
1690         return 0;
1691 }
1692
1693 static void default_options(struct f2fs_sb_info *sbi)
1694 {
1695         /* init some FS parameters */
1696         F2FS_OPTION(sbi).active_logs = NR_CURSEG_PERSIST_TYPE;
1697         F2FS_OPTION(sbi).inline_xattr_size = DEFAULT_INLINE_XATTR_ADDRS;
1698         F2FS_OPTION(sbi).whint_mode = WHINT_MODE_OFF;
1699         F2FS_OPTION(sbi).alloc_mode = ALLOC_MODE_DEFAULT;
1700         F2FS_OPTION(sbi).fsync_mode = FSYNC_MODE_POSIX;
1701         F2FS_OPTION(sbi).s_resuid = make_kuid(&init_user_ns, F2FS_DEF_RESUID);
1702         F2FS_OPTION(sbi).s_resgid = make_kgid(&init_user_ns, F2FS_DEF_RESGID);
1703         F2FS_OPTION(sbi).compress_algorithm = COMPRESS_LZ4;
1704         F2FS_OPTION(sbi).compress_log_size = MIN_COMPRESS_LOG_SIZE;
1705         F2FS_OPTION(sbi).compress_ext_cnt = 0;
1706         F2FS_OPTION(sbi).compress_mode = COMPR_MODE_FS;
1707         F2FS_OPTION(sbi).bggc_mode = BGGC_MODE_ON;
1708
1709         sbi->sb->s_flags &= ~SB_INLINECRYPT;
1710
1711         set_opt(sbi, INLINE_XATTR);
1712         set_opt(sbi, INLINE_DATA);
1713         set_opt(sbi, INLINE_DENTRY);
1714         set_opt(sbi, EXTENT_CACHE);
1715         set_opt(sbi, NOHEAP);
1716         clear_opt(sbi, DISABLE_CHECKPOINT);
1717         F2FS_OPTION(sbi).unusable_cap = 0;
1718         sbi->sb->s_flags |= SB_LAZYTIME;
1719         set_opt(sbi, FLUSH_MERGE);
1720         set_opt(sbi, DISCARD);
1721         if (f2fs_sb_has_blkzoned(sbi))
1722                 F2FS_OPTION(sbi).fs_mode = FS_MODE_LFS;
1723         else
1724                 F2FS_OPTION(sbi).fs_mode = FS_MODE_ADAPTIVE;
1725
1726 #ifdef CONFIG_F2FS_FS_XATTR
1727         set_opt(sbi, XATTR_USER);
1728 #endif
1729 #ifdef CONFIG_F2FS_FS_POSIX_ACL
1730         set_opt(sbi, POSIX_ACL);
1731 #endif
1732
1733         f2fs_build_fault_attr(sbi, 0, 0);
1734 }
1735
1736 #ifdef CONFIG_QUOTA
1737 static int f2fs_enable_quotas(struct super_block *sb);
1738 #endif
1739
1740 static int f2fs_disable_checkpoint(struct f2fs_sb_info *sbi)
1741 {
1742         unsigned int s_flags = sbi->sb->s_flags;
1743         struct cp_control cpc;
1744         int err = 0;
1745         int ret;
1746         block_t unusable;
1747
1748         if (s_flags & SB_RDONLY) {
1749                 f2fs_err(sbi, "checkpoint=disable on readonly fs");
1750                 return -EINVAL;
1751         }
1752         sbi->sb->s_flags |= SB_ACTIVE;
1753
1754         f2fs_update_time(sbi, DISABLE_TIME);
1755
1756         while (!f2fs_time_over(sbi, DISABLE_TIME)) {
1757                 down_write(&sbi->gc_lock);
1758                 err = f2fs_gc(sbi, true, false, NULL_SEGNO);
1759                 if (err == -ENODATA) {
1760                         err = 0;
1761                         break;
1762                 }
1763                 if (err && err != -EAGAIN)
1764                         break;
1765         }
1766
1767         ret = sync_filesystem(sbi->sb);
1768         if (ret || err) {
1769                 err = ret ? ret: err;
1770                 goto restore_flag;
1771         }
1772
1773         unusable = f2fs_get_unusable_blocks(sbi);
1774         if (f2fs_disable_cp_again(sbi, unusable)) {
1775                 err = -EAGAIN;
1776                 goto restore_flag;
1777         }
1778
1779         down_write(&sbi->gc_lock);
1780         cpc.reason = CP_PAUSE;
1781         set_sbi_flag(sbi, SBI_CP_DISABLED);
1782         err = f2fs_write_checkpoint(sbi, &cpc);
1783         if (err)
1784                 goto out_unlock;
1785
1786         spin_lock(&sbi->stat_lock);
1787         sbi->unusable_block_count = unusable;
1788         spin_unlock(&sbi->stat_lock);
1789
1790 out_unlock:
1791         up_write(&sbi->gc_lock);
1792 restore_flag:
1793         sbi->sb->s_flags = s_flags;     /* Restore SB_RDONLY status */
1794         return err;
1795 }
1796
1797 static void f2fs_enable_checkpoint(struct f2fs_sb_info *sbi)
1798 {
1799         down_write(&sbi->gc_lock);
1800         f2fs_dirty_to_prefree(sbi);
1801
1802         clear_sbi_flag(sbi, SBI_CP_DISABLED);
1803         set_sbi_flag(sbi, SBI_IS_DIRTY);
1804         up_write(&sbi->gc_lock);
1805
1806         f2fs_sync_fs(sbi->sb, 1);
1807 }
1808
1809 static int f2fs_remount(struct super_block *sb, int *flags, char *data)
1810 {
1811         struct f2fs_sb_info *sbi = F2FS_SB(sb);
1812         struct f2fs_mount_info org_mount_opt;
1813         unsigned long old_sb_flags;
1814         int err;
1815         bool need_restart_gc = false;
1816         bool need_stop_gc = false;
1817         bool no_extent_cache = !test_opt(sbi, EXTENT_CACHE);
1818         bool disable_checkpoint = test_opt(sbi, DISABLE_CHECKPOINT);
1819         bool no_io_align = !F2FS_IO_ALIGNED(sbi);
1820         bool no_atgc = !test_opt(sbi, ATGC);
1821         bool checkpoint_changed;
1822 #ifdef CONFIG_QUOTA
1823         int i, j;
1824 #endif
1825
1826         /*
1827          * Save the old mount options in case we
1828          * need to restore them.
1829          */
1830         org_mount_opt = sbi->mount_opt;
1831         old_sb_flags = sb->s_flags;
1832
1833 #ifdef CONFIG_QUOTA
1834         org_mount_opt.s_jquota_fmt = F2FS_OPTION(sbi).s_jquota_fmt;
1835         for (i = 0; i < MAXQUOTAS; i++) {
1836                 if (F2FS_OPTION(sbi).s_qf_names[i]) {
1837                         org_mount_opt.s_qf_names[i] =
1838                                 kstrdup(F2FS_OPTION(sbi).s_qf_names[i],
1839                                 GFP_KERNEL);
1840                         if (!org_mount_opt.s_qf_names[i]) {
1841                                 for (j = 0; j < i; j++)
1842                                         kfree(org_mount_opt.s_qf_names[j]);
1843                                 return -ENOMEM;
1844                         }
1845                 } else {
1846                         org_mount_opt.s_qf_names[i] = NULL;
1847                 }
1848         }
1849 #endif
1850
1851         /* recover superblocks we couldn't write due to previous RO mount */
1852         if (!(*flags & SB_RDONLY) && is_sbi_flag_set(sbi, SBI_NEED_SB_WRITE)) {
1853                 err = f2fs_commit_super(sbi, false);
1854                 f2fs_info(sbi, "Try to recover all the superblocks, ret: %d",
1855                           err);
1856                 if (!err)
1857                         clear_sbi_flag(sbi, SBI_NEED_SB_WRITE);
1858         }
1859
1860         default_options(sbi);
1861
1862         /* parse mount options */
1863         err = parse_options(sb, data, true);
1864         if (err)
1865                 goto restore_opts;
1866         checkpoint_changed =
1867                         disable_checkpoint != test_opt(sbi, DISABLE_CHECKPOINT);
1868
1869         /*
1870          * Previous and new state of filesystem is RO,
1871          * so skip checking GC and FLUSH_MERGE conditions.
1872          */
1873         if (f2fs_readonly(sb) && (*flags & SB_RDONLY))
1874                 goto skip;
1875
1876 #ifdef CONFIG_QUOTA
1877         if (!f2fs_readonly(sb) && (*flags & SB_RDONLY)) {
1878                 err = dquot_suspend(sb, -1);
1879                 if (err < 0)
1880                         goto restore_opts;
1881         } else if (f2fs_readonly(sb) && !(*flags & SB_RDONLY)) {
1882                 /* dquot_resume needs RW */
1883                 sb->s_flags &= ~SB_RDONLY;
1884                 if (sb_any_quota_suspended(sb)) {
1885                         dquot_resume(sb, -1);
1886                 } else if (f2fs_sb_has_quota_ino(sbi)) {
1887                         err = f2fs_enable_quotas(sb);
1888                         if (err)
1889                                 goto restore_opts;
1890                 }
1891         }
1892 #endif
1893         /* disallow enable atgc dynamically */
1894         if (no_atgc == !!test_opt(sbi, ATGC)) {
1895                 err = -EINVAL;
1896                 f2fs_warn(sbi, "switch atgc option is not allowed");
1897                 goto restore_opts;
1898         }
1899
1900         /* disallow enable/disable extent_cache dynamically */
1901         if (no_extent_cache == !!test_opt(sbi, EXTENT_CACHE)) {
1902                 err = -EINVAL;
1903                 f2fs_warn(sbi, "switch extent_cache option is not allowed");
1904                 goto restore_opts;
1905         }
1906
1907         if (no_io_align == !!F2FS_IO_ALIGNED(sbi)) {
1908                 err = -EINVAL;
1909                 f2fs_warn(sbi, "switch io_bits option is not allowed");
1910                 goto restore_opts;
1911         }
1912
1913         if ((*flags & SB_RDONLY) && test_opt(sbi, DISABLE_CHECKPOINT)) {
1914                 err = -EINVAL;
1915                 f2fs_warn(sbi, "disabling checkpoint not compatible with read-only");
1916                 goto restore_opts;
1917         }
1918
1919         /*
1920          * We stop the GC thread if FS is mounted as RO
1921          * or if background_gc = off is passed in mount
1922          * option. Also sync the filesystem.
1923          */
1924         if ((*flags & SB_RDONLY) ||
1925                         F2FS_OPTION(sbi).bggc_mode == BGGC_MODE_OFF) {
1926                 if (sbi->gc_thread) {
1927                         f2fs_stop_gc_thread(sbi);
1928                         need_restart_gc = true;
1929                 }
1930         } else if (!sbi->gc_thread) {
1931                 err = f2fs_start_gc_thread(sbi);
1932                 if (err)
1933                         goto restore_opts;
1934                 need_stop_gc = true;
1935         }
1936
1937         if (*flags & SB_RDONLY ||
1938                 F2FS_OPTION(sbi).whint_mode != org_mount_opt.whint_mode) {
1939                 sync_inodes_sb(sb);
1940
1941                 set_sbi_flag(sbi, SBI_IS_DIRTY);
1942                 set_sbi_flag(sbi, SBI_IS_CLOSE);
1943                 f2fs_sync_fs(sb, 1);
1944                 clear_sbi_flag(sbi, SBI_IS_CLOSE);
1945         }
1946
1947         if (checkpoint_changed) {
1948                 if (test_opt(sbi, DISABLE_CHECKPOINT)) {
1949                         err = f2fs_disable_checkpoint(sbi);
1950                         if (err)
1951                                 goto restore_gc;
1952                 } else {
1953                         f2fs_enable_checkpoint(sbi);
1954                 }
1955         }
1956
1957         /*
1958          * We stop issue flush thread if FS is mounted as RO
1959          * or if flush_merge is not passed in mount option.
1960          */
1961         if ((*flags & SB_RDONLY) || !test_opt(sbi, FLUSH_MERGE)) {
1962                 clear_opt(sbi, FLUSH_MERGE);
1963                 f2fs_destroy_flush_cmd_control(sbi, false);
1964         } else {
1965                 err = f2fs_create_flush_cmd_control(sbi);
1966                 if (err)
1967                         goto restore_gc;
1968         }
1969 skip:
1970 #ifdef CONFIG_QUOTA
1971         /* Release old quota file names */
1972         for (i = 0; i < MAXQUOTAS; i++)
1973                 kfree(org_mount_opt.s_qf_names[i]);
1974 #endif
1975         /* Update the POSIXACL Flag */
1976         sb->s_flags = (sb->s_flags & ~SB_POSIXACL) |
1977                 (test_opt(sbi, POSIX_ACL) ? SB_POSIXACL : 0);
1978
1979         limit_reserve_root(sbi);
1980         adjust_unusable_cap_perc(sbi);
1981         *flags = (*flags & ~SB_LAZYTIME) | (sb->s_flags & SB_LAZYTIME);
1982         return 0;
1983 restore_gc:
1984         if (need_restart_gc) {
1985                 if (f2fs_start_gc_thread(sbi))
1986                         f2fs_warn(sbi, "background gc thread has stopped");
1987         } else if (need_stop_gc) {
1988                 f2fs_stop_gc_thread(sbi);
1989         }
1990 restore_opts:
1991 #ifdef CONFIG_QUOTA
1992         F2FS_OPTION(sbi).s_jquota_fmt = org_mount_opt.s_jquota_fmt;
1993         for (i = 0; i < MAXQUOTAS; i++) {
1994                 kfree(F2FS_OPTION(sbi).s_qf_names[i]);
1995                 F2FS_OPTION(sbi).s_qf_names[i] = org_mount_opt.s_qf_names[i];
1996         }
1997 #endif
1998         sbi->mount_opt = org_mount_opt;
1999         sb->s_flags = old_sb_flags;
2000         return err;
2001 }
2002
2003 #ifdef CONFIG_QUOTA
2004 /* Read data from quotafile */
2005 static ssize_t f2fs_quota_read(struct super_block *sb, int type, char *data,
2006                                size_t len, loff_t off)
2007 {
2008         struct inode *inode = sb_dqopt(sb)->files[type];
2009         struct address_space *mapping = inode->i_mapping;
2010         block_t blkidx = F2FS_BYTES_TO_BLK(off);
2011         int offset = off & (sb->s_blocksize - 1);
2012         int tocopy;
2013         size_t toread;
2014         loff_t i_size = i_size_read(inode);
2015         struct page *page;
2016         char *kaddr;
2017
2018         if (off > i_size)
2019                 return 0;
2020
2021         if (off + len > i_size)
2022                 len = i_size - off;
2023         toread = len;
2024         while (toread > 0) {
2025                 tocopy = min_t(unsigned long, sb->s_blocksize - offset, toread);
2026 repeat:
2027                 page = read_cache_page_gfp(mapping, blkidx, GFP_NOFS);
2028                 if (IS_ERR(page)) {
2029                         if (PTR_ERR(page) == -ENOMEM) {
2030                                 congestion_wait(BLK_RW_ASYNC,
2031                                                 DEFAULT_IO_TIMEOUT);
2032                                 goto repeat;
2033                         }
2034                         set_sbi_flag(F2FS_SB(sb), SBI_QUOTA_NEED_REPAIR);
2035                         return PTR_ERR(page);
2036                 }
2037
2038                 lock_page(page);
2039
2040                 if (unlikely(page->mapping != mapping)) {
2041                         f2fs_put_page(page, 1);
2042                         goto repeat;
2043                 }
2044                 if (unlikely(!PageUptodate(page))) {
2045                         f2fs_put_page(page, 1);
2046                         set_sbi_flag(F2FS_SB(sb), SBI_QUOTA_NEED_REPAIR);
2047                         return -EIO;
2048                 }
2049
2050                 kaddr = kmap_atomic(page);
2051                 memcpy(data, kaddr + offset, tocopy);
2052                 kunmap_atomic(kaddr);
2053                 f2fs_put_page(page, 1);
2054
2055                 offset = 0;
2056                 toread -= tocopy;
2057                 data += tocopy;
2058                 blkidx++;
2059         }
2060         return len;
2061 }
2062
2063 /* Write to quotafile */
2064 static ssize_t f2fs_quota_write(struct super_block *sb, int type,
2065                                 const char *data, size_t len, loff_t off)
2066 {
2067         struct inode *inode = sb_dqopt(sb)->files[type];
2068         struct address_space *mapping = inode->i_mapping;
2069         const struct address_space_operations *a_ops = mapping->a_ops;
2070         int offset = off & (sb->s_blocksize - 1);
2071         size_t towrite = len;
2072         struct page *page;
2073         void *fsdata = NULL;
2074         char *kaddr;
2075         int err = 0;
2076         int tocopy;
2077
2078         while (towrite > 0) {
2079                 tocopy = min_t(unsigned long, sb->s_blocksize - offset,
2080                                                                 towrite);
2081 retry:
2082                 err = a_ops->write_begin(NULL, mapping, off, tocopy, 0,
2083                                                         &page, &fsdata);
2084                 if (unlikely(err)) {
2085                         if (err == -ENOMEM) {
2086                                 congestion_wait(BLK_RW_ASYNC,
2087                                                 DEFAULT_IO_TIMEOUT);
2088                                 goto retry;
2089                         }
2090                         set_sbi_flag(F2FS_SB(sb), SBI_QUOTA_NEED_REPAIR);
2091                         break;
2092                 }
2093
2094                 kaddr = kmap_atomic(page);
2095                 memcpy(kaddr + offset, data, tocopy);
2096                 kunmap_atomic(kaddr);
2097                 flush_dcache_page(page);
2098
2099                 a_ops->write_end(NULL, mapping, off, tocopy, tocopy,
2100                                                 page, fsdata);
2101                 offset = 0;
2102                 towrite -= tocopy;
2103                 off += tocopy;
2104                 data += tocopy;
2105                 cond_resched();
2106         }
2107
2108         if (len == towrite)
2109                 return err;
2110         inode->i_mtime = inode->i_ctime = current_time(inode);
2111         f2fs_mark_inode_dirty_sync(inode, false);
2112         return len - towrite;
2113 }
2114
2115 static struct dquot **f2fs_get_dquots(struct inode *inode)
2116 {
2117         return F2FS_I(inode)->i_dquot;
2118 }
2119
2120 static qsize_t *f2fs_get_reserved_space(struct inode *inode)
2121 {
2122         return &F2FS_I(inode)->i_reserved_quota;
2123 }
2124
2125 static int f2fs_quota_on_mount(struct f2fs_sb_info *sbi, int type)
2126 {
2127         if (is_set_ckpt_flags(sbi, CP_QUOTA_NEED_FSCK_FLAG)) {
2128                 f2fs_err(sbi, "quota sysfile may be corrupted, skip loading it");
2129                 return 0;
2130         }
2131
2132         return dquot_quota_on_mount(sbi->sb, F2FS_OPTION(sbi).s_qf_names[type],
2133                                         F2FS_OPTION(sbi).s_jquota_fmt, type);
2134 }
2135
2136 int f2fs_enable_quota_files(struct f2fs_sb_info *sbi, bool rdonly)
2137 {
2138         int enabled = 0;
2139         int i, err;
2140
2141         if (f2fs_sb_has_quota_ino(sbi) && rdonly) {
2142                 err = f2fs_enable_quotas(sbi->sb);
2143                 if (err) {
2144                         f2fs_err(sbi, "Cannot turn on quota_ino: %d", err);
2145                         return 0;
2146                 }
2147                 return 1;
2148         }
2149
2150         for (i = 0; i < MAXQUOTAS; i++) {
2151                 if (F2FS_OPTION(sbi).s_qf_names[i]) {
2152                         err = f2fs_quota_on_mount(sbi, i);
2153                         if (!err) {
2154                                 enabled = 1;
2155                                 continue;
2156                         }
2157                         f2fs_err(sbi, "Cannot turn on quotas: %d on %d",
2158                                  err, i);
2159                 }
2160         }
2161         return enabled;
2162 }
2163
2164 static int f2fs_quota_enable(struct super_block *sb, int type, int format_id,
2165                              unsigned int flags)
2166 {
2167         struct inode *qf_inode;
2168         unsigned long qf_inum;
2169         int err;
2170
2171         BUG_ON(!f2fs_sb_has_quota_ino(F2FS_SB(sb)));
2172
2173         qf_inum = f2fs_qf_ino(sb, type);
2174         if (!qf_inum)
2175                 return -EPERM;
2176
2177         qf_inode = f2fs_iget(sb, qf_inum);
2178         if (IS_ERR(qf_inode)) {
2179                 f2fs_err(F2FS_SB(sb), "Bad quota inode %u:%lu", type, qf_inum);
2180                 return PTR_ERR(qf_inode);
2181         }
2182
2183         /* Don't account quota for quota files to avoid recursion */
2184         qf_inode->i_flags |= S_NOQUOTA;
2185         err = dquot_load_quota_inode(qf_inode, type, format_id, flags);
2186         iput(qf_inode);
2187         return err;
2188 }
2189
2190 static int f2fs_enable_quotas(struct super_block *sb)
2191 {
2192         struct f2fs_sb_info *sbi = F2FS_SB(sb);
2193         int type, err = 0;
2194         unsigned long qf_inum;
2195         bool quota_mopt[MAXQUOTAS] = {
2196                 test_opt(sbi, USRQUOTA),
2197                 test_opt(sbi, GRPQUOTA),
2198                 test_opt(sbi, PRJQUOTA),
2199         };
2200
2201         if (is_set_ckpt_flags(F2FS_SB(sb), CP_QUOTA_NEED_FSCK_FLAG)) {
2202                 f2fs_err(sbi, "quota file may be corrupted, skip loading it");
2203                 return 0;
2204         }
2205
2206         sb_dqopt(sb)->flags |= DQUOT_QUOTA_SYS_FILE;
2207
2208         for (type = 0; type < MAXQUOTAS; type++) {
2209                 qf_inum = f2fs_qf_ino(sb, type);
2210                 if (qf_inum) {
2211                         err = f2fs_quota_enable(sb, type, QFMT_VFS_V1,
2212                                 DQUOT_USAGE_ENABLED |
2213                                 (quota_mopt[type] ? DQUOT_LIMITS_ENABLED : 0));
2214                         if (err) {
2215                                 f2fs_err(sbi, "Failed to enable quota tracking (type=%d, err=%d). Please run fsck to fix.",
2216                                          type, err);
2217                                 for (type--; type >= 0; type--)
2218                                         dquot_quota_off(sb, type);
2219                                 set_sbi_flag(F2FS_SB(sb),
2220                                                 SBI_QUOTA_NEED_REPAIR);
2221                                 return err;
2222                         }
2223                 }
2224         }
2225         return 0;
2226 }
2227
2228 int f2fs_quota_sync(struct super_block *sb, int type)
2229 {
2230         struct f2fs_sb_info *sbi = F2FS_SB(sb);
2231         struct quota_info *dqopt = sb_dqopt(sb);
2232         int cnt;
2233         int ret;
2234
2235         /*
2236          * do_quotactl
2237          *  f2fs_quota_sync
2238          *  down_read(quota_sem)
2239          *  dquot_writeback_dquots()
2240          *  f2fs_dquot_commit
2241          *                            block_operation
2242          *                            down_read(quota_sem)
2243          */
2244         f2fs_lock_op(sbi);
2245
2246         down_read(&sbi->quota_sem);
2247         ret = dquot_writeback_dquots(sb, type);
2248         if (ret)
2249                 goto out;
2250
2251         /*
2252          * Now when everything is written we can discard the pagecache so
2253          * that userspace sees the changes.
2254          */
2255         for (cnt = 0; cnt < MAXQUOTAS; cnt++) {
2256                 struct address_space *mapping;
2257
2258                 if (type != -1 && cnt != type)
2259                         continue;
2260                 if (!sb_has_quota_active(sb, cnt))
2261                         continue;
2262
2263                 mapping = dqopt->files[cnt]->i_mapping;
2264
2265                 ret = filemap_fdatawrite(mapping);
2266                 if (ret)
2267                         goto out;
2268
2269                 /* if we are using journalled quota */
2270                 if (is_journalled_quota(sbi))
2271                         continue;
2272
2273                 ret = filemap_fdatawait(mapping);
2274                 if (ret)
2275                         set_sbi_flag(F2FS_SB(sb), SBI_QUOTA_NEED_REPAIR);
2276
2277                 inode_lock(dqopt->files[cnt]);
2278                 truncate_inode_pages(&dqopt->files[cnt]->i_data, 0);
2279                 inode_unlock(dqopt->files[cnt]);
2280         }
2281 out:
2282         if (ret)
2283                 set_sbi_flag(F2FS_SB(sb), SBI_QUOTA_NEED_REPAIR);
2284         up_read(&sbi->quota_sem);
2285         f2fs_unlock_op(sbi);
2286         return ret;
2287 }
2288
2289 static int f2fs_quota_on(struct super_block *sb, int type, int format_id,
2290                                                         const struct path *path)
2291 {
2292         struct inode *inode;
2293         int err;
2294
2295         /* if quota sysfile exists, deny enabling quota with specific file */
2296         if (f2fs_sb_has_quota_ino(F2FS_SB(sb))) {
2297                 f2fs_err(F2FS_SB(sb), "quota sysfile already exists");
2298                 return -EBUSY;
2299         }
2300
2301         err = f2fs_quota_sync(sb, type);
2302         if (err)
2303                 return err;
2304
2305         err = dquot_quota_on(sb, type, format_id, path);
2306         if (err)
2307                 return err;
2308
2309         inode = d_inode(path->dentry);
2310
2311         inode_lock(inode);
2312         F2FS_I(inode)->i_flags |= F2FS_NOATIME_FL | F2FS_IMMUTABLE_FL;
2313         f2fs_set_inode_flags(inode);
2314         inode_unlock(inode);
2315         f2fs_mark_inode_dirty_sync(inode, false);
2316
2317         return 0;
2318 }
2319
2320 static int __f2fs_quota_off(struct super_block *sb, int type)
2321 {
2322         struct inode *inode = sb_dqopt(sb)->files[type];
2323         int err;
2324
2325         if (!inode || !igrab(inode))
2326                 return dquot_quota_off(sb, type);
2327
2328         err = f2fs_quota_sync(sb, type);
2329         if (err)
2330                 goto out_put;
2331
2332         err = dquot_quota_off(sb, type);
2333         if (err || f2fs_sb_has_quota_ino(F2FS_SB(sb)))
2334                 goto out_put;
2335
2336         inode_lock(inode);
2337         F2FS_I(inode)->i_flags &= ~(F2FS_NOATIME_FL | F2FS_IMMUTABLE_FL);
2338         f2fs_set_inode_flags(inode);
2339         inode_unlock(inode);
2340         f2fs_mark_inode_dirty_sync(inode, false);
2341 out_put:
2342         iput(inode);
2343         return err;
2344 }
2345
2346 static int f2fs_quota_off(struct super_block *sb, int type)
2347 {
2348         struct f2fs_sb_info *sbi = F2FS_SB(sb);
2349         int err;
2350
2351         err = __f2fs_quota_off(sb, type);
2352
2353         /*
2354          * quotactl can shutdown journalled quota, result in inconsistence
2355          * between quota record and fs data by following updates, tag the
2356          * flag to let fsck be aware of it.
2357          */
2358         if (is_journalled_quota(sbi))
2359                 set_sbi_flag(sbi, SBI_QUOTA_NEED_REPAIR);
2360         return err;
2361 }
2362
2363 void f2fs_quota_off_umount(struct super_block *sb)
2364 {
2365         int type;
2366         int err;
2367
2368         for (type = 0; type < MAXQUOTAS; type++) {
2369                 err = __f2fs_quota_off(sb, type);
2370                 if (err) {
2371                         int ret = dquot_quota_off(sb, type);
2372
2373                         f2fs_err(F2FS_SB(sb), "Fail to turn off disk quota (type: %d, err: %d, ret:%d), Please run fsck to fix it.",
2374                                  type, err, ret);
2375                         set_sbi_flag(F2FS_SB(sb), SBI_QUOTA_NEED_REPAIR);
2376                 }
2377         }
2378         /*
2379          * In case of checkpoint=disable, we must flush quota blocks.
2380          * This can cause NULL exception for node_inode in end_io, since
2381          * put_super already dropped it.
2382          */
2383         sync_filesystem(sb);
2384 }
2385
2386 static void f2fs_truncate_quota_inode_pages(struct super_block *sb)
2387 {
2388         struct quota_info *dqopt = sb_dqopt(sb);
2389         int type;
2390
2391         for (type = 0; type < MAXQUOTAS; type++) {
2392                 if (!dqopt->files[type])
2393                         continue;
2394                 f2fs_inode_synced(dqopt->files[type]);
2395         }
2396 }
2397
2398 static int f2fs_dquot_commit(struct dquot *dquot)
2399 {
2400         struct f2fs_sb_info *sbi = F2FS_SB(dquot->dq_sb);
2401         int ret;
2402
2403         down_read_nested(&sbi->quota_sem, SINGLE_DEPTH_NESTING);
2404         ret = dquot_commit(dquot);
2405         if (ret < 0)
2406                 set_sbi_flag(sbi, SBI_QUOTA_NEED_REPAIR);
2407         up_read(&sbi->quota_sem);
2408         return ret;
2409 }
2410
2411 static int f2fs_dquot_acquire(struct dquot *dquot)
2412 {
2413         struct f2fs_sb_info *sbi = F2FS_SB(dquot->dq_sb);
2414         int ret;
2415
2416         down_read(&sbi->quota_sem);
2417         ret = dquot_acquire(dquot);
2418         if (ret < 0)
2419                 set_sbi_flag(sbi, SBI_QUOTA_NEED_REPAIR);
2420         up_read(&sbi->quota_sem);
2421         return ret;
2422 }
2423
2424 static int f2fs_dquot_release(struct dquot *dquot)
2425 {
2426         struct f2fs_sb_info *sbi = F2FS_SB(dquot->dq_sb);
2427         int ret = dquot_release(dquot);
2428
2429         if (ret < 0)
2430                 set_sbi_flag(sbi, SBI_QUOTA_NEED_REPAIR);
2431         return ret;
2432 }
2433
2434 static int f2fs_dquot_mark_dquot_dirty(struct dquot *dquot)
2435 {
2436         struct super_block *sb = dquot->dq_sb;
2437         struct f2fs_sb_info *sbi = F2FS_SB(sb);
2438         int ret = dquot_mark_dquot_dirty(dquot);
2439
2440         /* if we are using journalled quota */
2441         if (is_journalled_quota(sbi))
2442                 set_sbi_flag(sbi, SBI_QUOTA_NEED_FLUSH);
2443
2444         return ret;
2445 }
2446
2447 static int f2fs_dquot_commit_info(struct super_block *sb, int type)
2448 {
2449         struct f2fs_sb_info *sbi = F2FS_SB(sb);
2450         int ret = dquot_commit_info(sb, type);
2451
2452         if (ret < 0)
2453                 set_sbi_flag(sbi, SBI_QUOTA_NEED_REPAIR);
2454         return ret;
2455 }
2456
2457 static int f2fs_get_projid(struct inode *inode, kprojid_t *projid)
2458 {
2459         *projid = F2FS_I(inode)->i_projid;
2460         return 0;
2461 }
2462
2463 static const struct dquot_operations f2fs_quota_operations = {
2464         .get_reserved_space = f2fs_get_reserved_space,
2465         .write_dquot    = f2fs_dquot_commit,
2466         .acquire_dquot  = f2fs_dquot_acquire,
2467         .release_dquot  = f2fs_dquot_release,
2468         .mark_dirty     = f2fs_dquot_mark_dquot_dirty,
2469         .write_info     = f2fs_dquot_commit_info,
2470         .alloc_dquot    = dquot_alloc,
2471         .destroy_dquot  = dquot_destroy,
2472         .get_projid     = f2fs_get_projid,
2473         .get_next_id    = dquot_get_next_id,
2474 };
2475
2476 static const struct quotactl_ops f2fs_quotactl_ops = {
2477         .quota_on       = f2fs_quota_on,
2478         .quota_off      = f2fs_quota_off,
2479         .quota_sync     = f2fs_quota_sync,
2480         .get_state      = dquot_get_state,
2481         .set_info       = dquot_set_dqinfo,
2482         .get_dqblk      = dquot_get_dqblk,
2483         .set_dqblk      = dquot_set_dqblk,
2484         .get_nextdqblk  = dquot_get_next_dqblk,
2485 };
2486 #else
2487 int f2fs_quota_sync(struct super_block *sb, int type)
2488 {
2489         return 0;
2490 }
2491
2492 void f2fs_quota_off_umount(struct super_block *sb)
2493 {
2494 }
2495 #endif
2496
2497 static const struct super_operations f2fs_sops = {
2498         .alloc_inode    = f2fs_alloc_inode,
2499         .free_inode     = f2fs_free_inode,
2500         .drop_inode     = f2fs_drop_inode,
2501         .write_inode    = f2fs_write_inode,
2502         .dirty_inode    = f2fs_dirty_inode,
2503         .show_options   = f2fs_show_options,
2504 #ifdef CONFIG_QUOTA
2505         .quota_read     = f2fs_quota_read,
2506         .quota_write    = f2fs_quota_write,
2507         .get_dquots     = f2fs_get_dquots,
2508 #endif
2509         .evict_inode    = f2fs_evict_inode,
2510         .put_super      = f2fs_put_super,
2511         .sync_fs        = f2fs_sync_fs,
2512         .freeze_fs      = f2fs_freeze,
2513         .unfreeze_fs    = f2fs_unfreeze,
2514         .statfs         = f2fs_statfs,
2515         .remount_fs     = f2fs_remount,
2516 };
2517
2518 #ifdef CONFIG_FS_ENCRYPTION
2519 static int f2fs_get_context(struct inode *inode, void *ctx, size_t len)
2520 {
2521         return f2fs_getxattr(inode, F2FS_XATTR_INDEX_ENCRYPTION,
2522                                 F2FS_XATTR_NAME_ENCRYPTION_CONTEXT,
2523                                 ctx, len, NULL);
2524 }
2525
2526 static int f2fs_set_context(struct inode *inode, const void *ctx, size_t len,
2527                                                         void *fs_data)
2528 {
2529         struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
2530
2531         /*
2532          * Encrypting the root directory is not allowed because fsck
2533          * expects lost+found directory to exist and remain unencrypted
2534          * if LOST_FOUND feature is enabled.
2535          *
2536          */
2537         if (f2fs_sb_has_lost_found(sbi) &&
2538                         inode->i_ino == F2FS_ROOT_INO(sbi))
2539                 return -EPERM;
2540
2541         return f2fs_setxattr(inode, F2FS_XATTR_INDEX_ENCRYPTION,
2542                                 F2FS_XATTR_NAME_ENCRYPTION_CONTEXT,
2543                                 ctx, len, fs_data, XATTR_CREATE);
2544 }
2545
2546 static const union fscrypt_policy *f2fs_get_dummy_policy(struct super_block *sb)
2547 {
2548         return F2FS_OPTION(F2FS_SB(sb)).dummy_enc_policy.policy;
2549 }
2550
2551 static bool f2fs_has_stable_inodes(struct super_block *sb)
2552 {
2553         return true;
2554 }
2555
2556 static void f2fs_get_ino_and_lblk_bits(struct super_block *sb,
2557                                        int *ino_bits_ret, int *lblk_bits_ret)
2558 {
2559         *ino_bits_ret = 8 * sizeof(nid_t);
2560         *lblk_bits_ret = 8 * sizeof(block_t);
2561 }
2562
2563 static int f2fs_get_num_devices(struct super_block *sb)
2564 {
2565         struct f2fs_sb_info *sbi = F2FS_SB(sb);
2566
2567         if (f2fs_is_multi_device(sbi))
2568                 return sbi->s_ndevs;
2569         return 1;
2570 }
2571
2572 static void f2fs_get_devices(struct super_block *sb,
2573                              struct request_queue **devs)
2574 {
2575         struct f2fs_sb_info *sbi = F2FS_SB(sb);
2576         int i;
2577
2578         for (i = 0; i < sbi->s_ndevs; i++)
2579                 devs[i] = bdev_get_queue(FDEV(i).bdev);
2580 }
2581
2582 static const struct fscrypt_operations f2fs_cryptops = {
2583         .key_prefix             = "f2fs:",
2584         .get_context            = f2fs_get_context,
2585         .set_context            = f2fs_set_context,
2586         .get_dummy_policy       = f2fs_get_dummy_policy,
2587         .empty_dir              = f2fs_empty_dir,
2588         .max_namelen            = F2FS_NAME_LEN,
2589         .has_stable_inodes      = f2fs_has_stable_inodes,
2590         .get_ino_and_lblk_bits  = f2fs_get_ino_and_lblk_bits,
2591         .get_num_devices        = f2fs_get_num_devices,
2592         .get_devices            = f2fs_get_devices,
2593 };
2594 #endif
2595
2596 static struct inode *f2fs_nfs_get_inode(struct super_block *sb,
2597                 u64 ino, u32 generation)
2598 {
2599         struct f2fs_sb_info *sbi = F2FS_SB(sb);
2600         struct inode *inode;
2601
2602         if (f2fs_check_nid_range(sbi, ino))
2603                 return ERR_PTR(-ESTALE);
2604
2605         /*
2606          * f2fs_iget isn't quite right if the inode is currently unallocated!
2607          * However f2fs_iget currently does appropriate checks to handle stale
2608          * inodes so everything is OK.
2609          */
2610         inode = f2fs_iget(sb, ino);
2611         if (IS_ERR(inode))
2612                 return ERR_CAST(inode);
2613         if (unlikely(generation && inode->i_generation != generation)) {
2614                 /* we didn't find the right inode.. */
2615                 iput(inode);
2616                 return ERR_PTR(-ESTALE);
2617         }
2618         return inode;
2619 }
2620
2621 static struct dentry *f2fs_fh_to_dentry(struct super_block *sb, struct fid *fid,
2622                 int fh_len, int fh_type)
2623 {
2624         return generic_fh_to_dentry(sb, fid, fh_len, fh_type,
2625                                     f2fs_nfs_get_inode);
2626 }
2627
2628 static struct dentry *f2fs_fh_to_parent(struct super_block *sb, struct fid *fid,
2629                 int fh_len, int fh_type)
2630 {
2631         return generic_fh_to_parent(sb, fid, fh_len, fh_type,
2632                                     f2fs_nfs_get_inode);
2633 }
2634
2635 static const struct export_operations f2fs_export_ops = {
2636         .fh_to_dentry = f2fs_fh_to_dentry,
2637         .fh_to_parent = f2fs_fh_to_parent,
2638         .get_parent = f2fs_get_parent,
2639 };
2640
2641 static loff_t max_file_blocks(void)
2642 {
2643         loff_t result = 0;
2644         loff_t leaf_count = DEF_ADDRS_PER_BLOCK;
2645
2646         /*
2647          * note: previously, result is equal to (DEF_ADDRS_PER_INODE -
2648          * DEFAULT_INLINE_XATTR_ADDRS), but now f2fs try to reserve more
2649          * space in inode.i_addr, it will be more safe to reassign
2650          * result as zero.
2651          */
2652
2653         /* two direct node blocks */
2654         result += (leaf_count * 2);
2655
2656         /* two indirect node blocks */
2657         leaf_count *= NIDS_PER_BLOCK;
2658         result += (leaf_count * 2);
2659
2660         /* one double indirect node block */
2661         leaf_count *= NIDS_PER_BLOCK;
2662         result += leaf_count;
2663
2664         return result;
2665 }
2666
2667 static int __f2fs_commit_super(struct buffer_head *bh,
2668                         struct f2fs_super_block *super)
2669 {
2670         lock_buffer(bh);
2671         if (super)
2672                 memcpy(bh->b_data + F2FS_SUPER_OFFSET, super, sizeof(*super));
2673         set_buffer_dirty(bh);
2674         unlock_buffer(bh);
2675
2676         /* it's rare case, we can do fua all the time */
2677         return __sync_dirty_buffer(bh, REQ_SYNC | REQ_PREFLUSH | REQ_FUA);
2678 }
2679
2680 static inline bool sanity_check_area_boundary(struct f2fs_sb_info *sbi,
2681                                         struct buffer_head *bh)
2682 {
2683         struct f2fs_super_block *raw_super = (struct f2fs_super_block *)
2684                                         (bh->b_data + F2FS_SUPER_OFFSET);
2685         struct super_block *sb = sbi->sb;
2686         u32 segment0_blkaddr = le32_to_cpu(raw_super->segment0_blkaddr);
2687         u32 cp_blkaddr = le32_to_cpu(raw_super->cp_blkaddr);
2688         u32 sit_blkaddr = le32_to_cpu(raw_super->sit_blkaddr);
2689         u32 nat_blkaddr = le32_to_cpu(raw_super->nat_blkaddr);
2690         u32 ssa_blkaddr = le32_to_cpu(raw_super->ssa_blkaddr);
2691         u32 main_blkaddr = le32_to_cpu(raw_super->main_blkaddr);
2692         u32 segment_count_ckpt = le32_to_cpu(raw_super->segment_count_ckpt);
2693         u32 segment_count_sit = le32_to_cpu(raw_super->segment_count_sit);
2694         u32 segment_count_nat = le32_to_cpu(raw_super->segment_count_nat);
2695         u32 segment_count_ssa = le32_to_cpu(raw_super->segment_count_ssa);
2696         u32 segment_count_main = le32_to_cpu(raw_super->segment_count_main);
2697         u32 segment_count = le32_to_cpu(raw_super->segment_count);
2698         u32 log_blocks_per_seg = le32_to_cpu(raw_super->log_blocks_per_seg);
2699         u64 main_end_blkaddr = main_blkaddr +
2700                                 (segment_count_main << log_blocks_per_seg);
2701         u64 seg_end_blkaddr = segment0_blkaddr +
2702                                 (segment_count << log_blocks_per_seg);
2703
2704         if (segment0_blkaddr != cp_blkaddr) {
2705                 f2fs_info(sbi, "Mismatch start address, segment0(%u) cp_blkaddr(%u)",
2706                           segment0_blkaddr, cp_blkaddr);
2707                 return true;
2708         }
2709
2710         if (cp_blkaddr + (segment_count_ckpt << log_blocks_per_seg) !=
2711                                                         sit_blkaddr) {
2712                 f2fs_info(sbi, "Wrong CP boundary, start(%u) end(%u) blocks(%u)",
2713                           cp_blkaddr, sit_blkaddr,
2714                           segment_count_ckpt << log_blocks_per_seg);
2715                 return true;
2716         }
2717
2718         if (sit_blkaddr + (segment_count_sit << log_blocks_per_seg) !=
2719                                                         nat_blkaddr) {
2720                 f2fs_info(sbi, "Wrong SIT boundary, start(%u) end(%u) blocks(%u)",
2721                           sit_blkaddr, nat_blkaddr,
2722                           segment_count_sit << log_blocks_per_seg);
2723                 return true;
2724         }
2725
2726         if (nat_blkaddr + (segment_count_nat << log_blocks_per_seg) !=
2727                                                         ssa_blkaddr) {
2728                 f2fs_info(sbi, "Wrong NAT boundary, start(%u) end(%u) blocks(%u)",
2729                           nat_blkaddr, ssa_blkaddr,
2730                           segment_count_nat << log_blocks_per_seg);
2731                 return true;
2732         }
2733
2734         if (ssa_blkaddr + (segment_count_ssa << log_blocks_per_seg) !=
2735                                                         main_blkaddr) {
2736                 f2fs_info(sbi, "Wrong SSA boundary, start(%u) end(%u) blocks(%u)",
2737                           ssa_blkaddr, main_blkaddr,
2738                           segment_count_ssa << log_blocks_per_seg);
2739                 return true;
2740         }
2741
2742         if (main_end_blkaddr > seg_end_blkaddr) {
2743                 f2fs_info(sbi, "Wrong MAIN_AREA boundary, start(%u) end(%llu) block(%u)",
2744                           main_blkaddr, seg_end_blkaddr,
2745                           segment_count_main << log_blocks_per_seg);
2746                 return true;
2747         } else if (main_end_blkaddr < seg_end_blkaddr) {
2748                 int err = 0;
2749                 char *res;
2750
2751                 /* fix in-memory information all the time */
2752                 raw_super->segment_count = cpu_to_le32((main_end_blkaddr -
2753                                 segment0_blkaddr) >> log_blocks_per_seg);
2754
2755                 if (f2fs_readonly(sb) || bdev_read_only(sb->s_bdev)) {
2756                         set_sbi_flag(sbi, SBI_NEED_SB_WRITE);
2757                         res = "internally";
2758                 } else {
2759                         err = __f2fs_commit_super(bh, NULL);
2760                         res = err ? "failed" : "done";
2761                 }
2762                 f2fs_info(sbi, "Fix alignment : %s, start(%u) end(%llu) block(%u)",
2763                           res, main_blkaddr, seg_end_blkaddr,
2764                           segment_count_main << log_blocks_per_seg);
2765                 if (err)
2766                         return true;
2767         }
2768         return false;
2769 }
2770
2771 static int sanity_check_raw_super(struct f2fs_sb_info *sbi,
2772                                 struct buffer_head *bh)
2773 {
2774         block_t segment_count, segs_per_sec, secs_per_zone, segment_count_main;
2775         block_t total_sections, blocks_per_seg;
2776         struct f2fs_super_block *raw_super = (struct f2fs_super_block *)
2777                                         (bh->b_data + F2FS_SUPER_OFFSET);
2778         size_t crc_offset = 0;
2779         __u32 crc = 0;
2780
2781         if (le32_to_cpu(raw_super->magic) != F2FS_SUPER_MAGIC) {
2782                 f2fs_info(sbi, "Magic Mismatch, valid(0x%x) - read(0x%x)",
2783                           F2FS_SUPER_MAGIC, le32_to_cpu(raw_super->magic));
2784                 return -EINVAL;
2785         }
2786
2787         /* Check checksum_offset and crc in superblock */
2788         if (__F2FS_HAS_FEATURE(raw_super, F2FS_FEATURE_SB_CHKSUM)) {
2789                 crc_offset = le32_to_cpu(raw_super->checksum_offset);
2790                 if (crc_offset !=
2791                         offsetof(struct f2fs_super_block, crc)) {
2792                         f2fs_info(sbi, "Invalid SB checksum offset: %zu",
2793                                   crc_offset);
2794                         return -EFSCORRUPTED;
2795                 }
2796                 crc = le32_to_cpu(raw_super->crc);
2797                 if (!f2fs_crc_valid(sbi, crc, raw_super, crc_offset)) {
2798                         f2fs_info(sbi, "Invalid SB checksum value: %u", crc);
2799                         return -EFSCORRUPTED;
2800                 }
2801         }
2802
2803         /* Currently, support only 4KB block size */
2804         if (le32_to_cpu(raw_super->log_blocksize) != F2FS_BLKSIZE_BITS) {
2805                 f2fs_info(sbi, "Invalid log_blocksize (%u), supports only %u",
2806                           le32_to_cpu(raw_super->log_blocksize),
2807                           F2FS_BLKSIZE_BITS);
2808                 return -EFSCORRUPTED;
2809         }
2810
2811         /* check log blocks per segment */
2812         if (le32_to_cpu(raw_super->log_blocks_per_seg) != 9) {
2813                 f2fs_info(sbi, "Invalid log blocks per segment (%u)",
2814                           le32_to_cpu(raw_super->log_blocks_per_seg));
2815                 return -EFSCORRUPTED;
2816         }
2817
2818         /* Currently, support 512/1024/2048/4096 bytes sector size */
2819         if (le32_to_cpu(raw_super->log_sectorsize) >
2820                                 F2FS_MAX_LOG_SECTOR_SIZE ||
2821                 le32_to_cpu(raw_super->log_sectorsize) <
2822                                 F2FS_MIN_LOG_SECTOR_SIZE) {
2823                 f2fs_info(sbi, "Invalid log sectorsize (%u)",
2824                           le32_to_cpu(raw_super->log_sectorsize));
2825                 return -EFSCORRUPTED;
2826         }
2827         if (le32_to_cpu(raw_super->log_sectors_per_block) +
2828                 le32_to_cpu(raw_super->log_sectorsize) !=
2829                         F2FS_MAX_LOG_SECTOR_SIZE) {
2830                 f2fs_info(sbi, "Invalid log sectors per block(%u) log sectorsize(%u)",
2831                           le32_to_cpu(raw_super->log_sectors_per_block),
2832                           le32_to_cpu(raw_super->log_sectorsize));
2833                 return -EFSCORRUPTED;
2834         }
2835
2836         segment_count = le32_to_cpu(raw_super->segment_count);
2837         segment_count_main = le32_to_cpu(raw_super->segment_count_main);
2838         segs_per_sec = le32_to_cpu(raw_super->segs_per_sec);
2839         secs_per_zone = le32_to_cpu(raw_super->secs_per_zone);
2840         total_sections = le32_to_cpu(raw_super->section_count);
2841
2842         /* blocks_per_seg should be 512, given the above check */
2843         blocks_per_seg = 1 << le32_to_cpu(raw_super->log_blocks_per_seg);
2844
2845         if (segment_count > F2FS_MAX_SEGMENT ||
2846                                 segment_count < F2FS_MIN_SEGMENTS) {
2847                 f2fs_info(sbi, "Invalid segment count (%u)", segment_count);
2848                 return -EFSCORRUPTED;
2849         }
2850
2851         if (total_sections > segment_count_main || total_sections < 1 ||
2852                         segs_per_sec > segment_count || !segs_per_sec) {
2853                 f2fs_info(sbi, "Invalid segment/section count (%u, %u x %u)",
2854                           segment_count, total_sections, segs_per_sec);
2855                 return -EFSCORRUPTED;
2856         }
2857
2858         if (segment_count_main != total_sections * segs_per_sec) {
2859                 f2fs_info(sbi, "Invalid segment/section count (%u != %u * %u)",
2860                           segment_count_main, total_sections, segs_per_sec);
2861                 return -EFSCORRUPTED;
2862         }
2863
2864         if ((segment_count / segs_per_sec) < total_sections) {
2865                 f2fs_info(sbi, "Small segment_count (%u < %u * %u)",
2866                           segment_count, segs_per_sec, total_sections);
2867                 return -EFSCORRUPTED;
2868         }
2869
2870         if (segment_count > (le64_to_cpu(raw_super->block_count) >> 9)) {
2871                 f2fs_info(sbi, "Wrong segment_count / block_count (%u > %llu)",
2872                           segment_count, le64_to_cpu(raw_super->block_count));
2873                 return -EFSCORRUPTED;
2874         }
2875
2876         if (RDEV(0).path[0]) {
2877                 block_t dev_seg_count = le32_to_cpu(RDEV(0).total_segments);
2878                 int i = 1;
2879
2880                 while (i < MAX_DEVICES && RDEV(i).path[0]) {
2881                         dev_seg_count += le32_to_cpu(RDEV(i).total_segments);
2882                         i++;
2883                 }
2884                 if (segment_count != dev_seg_count) {
2885                         f2fs_info(sbi, "Segment count (%u) mismatch with total segments from devices (%u)",
2886                                         segment_count, dev_seg_count);
2887                         return -EFSCORRUPTED;
2888                 }
2889         } else {
2890                 if (__F2FS_HAS_FEATURE(raw_super, F2FS_FEATURE_BLKZONED) &&
2891                                         !bdev_is_zoned(sbi->sb->s_bdev)) {
2892                         f2fs_info(sbi, "Zoned block device path is missing");
2893                         return -EFSCORRUPTED;
2894                 }
2895         }
2896
2897         if (secs_per_zone > total_sections || !secs_per_zone) {
2898                 f2fs_info(sbi, "Wrong secs_per_zone / total_sections (%u, %u)",
2899                           secs_per_zone, total_sections);
2900                 return -EFSCORRUPTED;
2901         }
2902         if (le32_to_cpu(raw_super->extension_count) > F2FS_MAX_EXTENSION ||
2903                         raw_super->hot_ext_count > F2FS_MAX_EXTENSION ||
2904                         (le32_to_cpu(raw_super->extension_count) +
2905                         raw_super->hot_ext_count) > F2FS_MAX_EXTENSION) {
2906                 f2fs_info(sbi, "Corrupted extension count (%u + %u > %u)",
2907                           le32_to_cpu(raw_super->extension_count),
2908                           raw_super->hot_ext_count,
2909                           F2FS_MAX_EXTENSION);
2910                 return -EFSCORRUPTED;
2911         }
2912
2913         if (le32_to_cpu(raw_super->cp_payload) >
2914                                 (blocks_per_seg - F2FS_CP_PACKS)) {
2915                 f2fs_info(sbi, "Insane cp_payload (%u > %u)",
2916                           le32_to_cpu(raw_super->cp_payload),
2917                           blocks_per_seg - F2FS_CP_PACKS);
2918                 return -EFSCORRUPTED;
2919         }
2920
2921         /* check reserved ino info */
2922         if (le32_to_cpu(raw_super->node_ino) != 1 ||
2923                 le32_to_cpu(raw_super->meta_ino) != 2 ||
2924                 le32_to_cpu(raw_super->root_ino) != 3) {
2925                 f2fs_info(sbi, "Invalid Fs Meta Ino: node(%u) meta(%u) root(%u)",
2926                           le32_to_cpu(raw_super->node_ino),
2927                           le32_to_cpu(raw_super->meta_ino),
2928                           le32_to_cpu(raw_super->root_ino));
2929                 return -EFSCORRUPTED;
2930         }
2931
2932         /* check CP/SIT/NAT/SSA/MAIN_AREA area boundary */
2933         if (sanity_check_area_boundary(sbi, bh))
2934                 return -EFSCORRUPTED;
2935
2936         return 0;
2937 }
2938
2939 int f2fs_sanity_check_ckpt(struct f2fs_sb_info *sbi)
2940 {
2941         unsigned int total, fsmeta;
2942         struct f2fs_super_block *raw_super = F2FS_RAW_SUPER(sbi);
2943         struct f2fs_checkpoint *ckpt = F2FS_CKPT(sbi);
2944         unsigned int ovp_segments, reserved_segments;
2945         unsigned int main_segs, blocks_per_seg;
2946         unsigned int sit_segs, nat_segs;
2947         unsigned int sit_bitmap_size, nat_bitmap_size;
2948         unsigned int log_blocks_per_seg;
2949         unsigned int segment_count_main;
2950         unsigned int cp_pack_start_sum, cp_payload;
2951         block_t user_block_count, valid_user_blocks;
2952         block_t avail_node_count, valid_node_count;
2953         int i, j;
2954
2955         total = le32_to_cpu(raw_super->segment_count);
2956         fsmeta = le32_to_cpu(raw_super->segment_count_ckpt);
2957         sit_segs = le32_to_cpu(raw_super->segment_count_sit);
2958         fsmeta += sit_segs;
2959         nat_segs = le32_to_cpu(raw_super->segment_count_nat);
2960         fsmeta += nat_segs;
2961         fsmeta += le32_to_cpu(ckpt->rsvd_segment_count);
2962         fsmeta += le32_to_cpu(raw_super->segment_count_ssa);
2963
2964         if (unlikely(fsmeta >= total))
2965                 return 1;
2966
2967         ovp_segments = le32_to_cpu(ckpt->overprov_segment_count);
2968         reserved_segments = le32_to_cpu(ckpt->rsvd_segment_count);
2969
2970         if (unlikely(fsmeta < F2FS_MIN_META_SEGMENTS ||
2971                         ovp_segments == 0 || reserved_segments == 0)) {
2972                 f2fs_err(sbi, "Wrong layout: check mkfs.f2fs version");
2973                 return 1;
2974         }
2975
2976         user_block_count = le64_to_cpu(ckpt->user_block_count);
2977         segment_count_main = le32_to_cpu(raw_super->segment_count_main);
2978         log_blocks_per_seg = le32_to_cpu(raw_super->log_blocks_per_seg);
2979         if (!user_block_count || user_block_count >=
2980                         segment_count_main << log_blocks_per_seg) {
2981                 f2fs_err(sbi, "Wrong user_block_count: %u",
2982                          user_block_count);
2983                 return 1;
2984         }
2985
2986         valid_user_blocks = le64_to_cpu(ckpt->valid_block_count);
2987         if (valid_user_blocks > user_block_count) {
2988                 f2fs_err(sbi, "Wrong valid_user_blocks: %u, user_block_count: %u",
2989                          valid_user_blocks, user_block_count);
2990                 return 1;
2991         }
2992
2993         valid_node_count = le32_to_cpu(ckpt->valid_node_count);
2994         avail_node_count = sbi->total_node_count - F2FS_RESERVED_NODE_NUM;
2995         if (valid_node_count > avail_node_count) {
2996                 f2fs_err(sbi, "Wrong valid_node_count: %u, avail_node_count: %u",
2997                          valid_node_count, avail_node_count);
2998                 return 1;
2999         }
3000
3001         main_segs = le32_to_cpu(raw_super->segment_count_main);
3002         blocks_per_seg = sbi->blocks_per_seg;
3003
3004         for (i = 0; i < NR_CURSEG_NODE_TYPE; i++) {
3005                 if (le32_to_cpu(ckpt->cur_node_segno[i]) >= main_segs ||
3006                         le16_to_cpu(ckpt->cur_node_blkoff[i]) >= blocks_per_seg)
3007                         return 1;
3008                 for (j = i + 1; j < NR_CURSEG_NODE_TYPE; j++) {
3009                         if (le32_to_cpu(ckpt->cur_node_segno[i]) ==
3010                                 le32_to_cpu(ckpt->cur_node_segno[j])) {
3011                                 f2fs_err(sbi, "Node segment (%u, %u) has the same segno: %u",
3012                                          i, j,
3013                                          le32_to_cpu(ckpt->cur_node_segno[i]));
3014                                 return 1;
3015                         }
3016                 }
3017         }
3018         for (i = 0; i < NR_CURSEG_DATA_TYPE; i++) {
3019                 if (le32_to_cpu(ckpt->cur_data_segno[i]) >= main_segs ||
3020                         le16_to_cpu(ckpt->cur_data_blkoff[i]) >= blocks_per_seg)
3021                         return 1;
3022                 for (j = i + 1; j < NR_CURSEG_DATA_TYPE; j++) {
3023                         if (le32_to_cpu(ckpt->cur_data_segno[i]) ==
3024                                 le32_to_cpu(ckpt->cur_data_segno[j])) {
3025                                 f2fs_err(sbi, "Data segment (%u, %u) has the same segno: %u",
3026                                          i, j,
3027                                          le32_to_cpu(ckpt->cur_data_segno[i]));
3028                                 return 1;
3029                         }
3030                 }
3031         }
3032         for (i = 0; i < NR_CURSEG_NODE_TYPE; i++) {
3033                 for (j = 0; j < NR_CURSEG_DATA_TYPE; j++) {
3034                         if (le32_to_cpu(ckpt->cur_node_segno[i]) ==
3035                                 le32_to_cpu(ckpt->cur_data_segno[j])) {
3036                                 f2fs_err(sbi, "Node segment (%u) and Data segment (%u) has the same segno: %u",
3037                                          i, j,
3038                                          le32_to_cpu(ckpt->cur_node_segno[i]));
3039                                 return 1;
3040                         }
3041                 }
3042         }
3043
3044         sit_bitmap_size = le32_to_cpu(ckpt->sit_ver_bitmap_bytesize);
3045         nat_bitmap_size = le32_to_cpu(ckpt->nat_ver_bitmap_bytesize);
3046
3047         if (sit_bitmap_size != ((sit_segs / 2) << log_blocks_per_seg) / 8 ||
3048                 nat_bitmap_size != ((nat_segs / 2) << log_blocks_per_seg) / 8) {
3049                 f2fs_err(sbi, "Wrong bitmap size: sit: %u, nat:%u",
3050                          sit_bitmap_size, nat_bitmap_size);
3051                 return 1;
3052         }
3053
3054         cp_pack_start_sum = __start_sum_addr(sbi);
3055         cp_payload = __cp_payload(sbi);
3056         if (cp_pack_start_sum < cp_payload + 1 ||
3057                 cp_pack_start_sum > blocks_per_seg - 1 -
3058                         NR_CURSEG_PERSIST_TYPE) {
3059                 f2fs_err(sbi, "Wrong cp_pack_start_sum: %u",
3060                          cp_pack_start_sum);
3061                 return 1;
3062         }
3063
3064         if (__is_set_ckpt_flags(ckpt, CP_LARGE_NAT_BITMAP_FLAG) &&
3065                 le32_to_cpu(ckpt->checksum_offset) != CP_MIN_CHKSUM_OFFSET) {
3066                 f2fs_warn(sbi, "using deprecated layout of large_nat_bitmap, "
3067                           "please run fsck v1.13.0 or higher to repair, chksum_offset: %u, "
3068                           "fixed with patch: \"f2fs-tools: relocate chksum_offset for large_nat_bitmap feature\"",
3069                           le32_to_cpu(ckpt->checksum_offset));
3070                 return 1;
3071         }
3072
3073         if (unlikely(f2fs_cp_error(sbi))) {
3074                 f2fs_err(sbi, "A bug case: need to run fsck");
3075                 return 1;
3076         }
3077         return 0;
3078 }
3079
3080 static void init_sb_info(struct f2fs_sb_info *sbi)
3081 {
3082         struct f2fs_super_block *raw_super = sbi->raw_super;
3083         int i;
3084
3085         sbi->log_sectors_per_block =
3086                 le32_to_cpu(raw_super->log_sectors_per_block);
3087         sbi->log_blocksize = le32_to_cpu(raw_super->log_blocksize);
3088         sbi->blocksize = 1 << sbi->log_blocksize;
3089         sbi->log_blocks_per_seg = le32_to_cpu(raw_super->log_blocks_per_seg);
3090         sbi->blocks_per_seg = 1 << sbi->log_blocks_per_seg;
3091         sbi->segs_per_sec = le32_to_cpu(raw_super->segs_per_sec);
3092         sbi->secs_per_zone = le32_to_cpu(raw_super->secs_per_zone);
3093         sbi->total_sections = le32_to_cpu(raw_super->section_count);
3094         sbi->total_node_count =
3095                 (le32_to_cpu(raw_super->segment_count_nat) / 2)
3096                         * sbi->blocks_per_seg * NAT_ENTRY_PER_BLOCK;
3097         F2FS_ROOT_INO(sbi) = le32_to_cpu(raw_super->root_ino);
3098         F2FS_NODE_INO(sbi) = le32_to_cpu(raw_super->node_ino);
3099         F2FS_META_INO(sbi) = le32_to_cpu(raw_super->meta_ino);
3100         sbi->cur_victim_sec = NULL_SECNO;
3101         sbi->next_victim_seg[BG_GC] = NULL_SEGNO;
3102         sbi->next_victim_seg[FG_GC] = NULL_SEGNO;
3103         sbi->max_victim_search = DEF_MAX_VICTIM_SEARCH;
3104         sbi->migration_granularity = sbi->segs_per_sec;
3105
3106         sbi->dir_level = DEF_DIR_LEVEL;
3107         sbi->interval_time[CP_TIME] = DEF_CP_INTERVAL;
3108         sbi->interval_time[REQ_TIME] = DEF_IDLE_INTERVAL;
3109         sbi->interval_time[DISCARD_TIME] = DEF_IDLE_INTERVAL;
3110         sbi->interval_time[GC_TIME] = DEF_IDLE_INTERVAL;
3111         sbi->interval_time[DISABLE_TIME] = DEF_DISABLE_INTERVAL;
3112         sbi->interval_time[UMOUNT_DISCARD_TIMEOUT] =
3113                                 DEF_UMOUNT_DISCARD_TIMEOUT;
3114         clear_sbi_flag(sbi, SBI_NEED_FSCK);
3115
3116         for (i = 0; i < NR_COUNT_TYPE; i++)
3117                 atomic_set(&sbi->nr_pages[i], 0);
3118
3119         for (i = 0; i < META; i++)
3120                 atomic_set(&sbi->wb_sync_req[i], 0);
3121
3122         INIT_LIST_HEAD(&sbi->s_list);
3123         mutex_init(&sbi->umount_mutex);
3124         init_rwsem(&sbi->io_order_lock);
3125         spin_lock_init(&sbi->cp_lock);
3126
3127         sbi->dirty_device = 0;
3128         spin_lock_init(&sbi->dev_lock);
3129
3130         init_rwsem(&sbi->sb_lock);
3131         init_rwsem(&sbi->pin_sem);
3132 }
3133
3134 static int init_percpu_info(struct f2fs_sb_info *sbi)
3135 {
3136         int err;
3137
3138         err = percpu_counter_init(&sbi->alloc_valid_block_count, 0, GFP_KERNEL);
3139         if (err)
3140                 return err;
3141
3142         err = percpu_counter_init(&sbi->total_valid_inode_count, 0,
3143                                                                 GFP_KERNEL);
3144         if (err)
3145                 percpu_counter_destroy(&sbi->alloc_valid_block_count);
3146
3147         return err;
3148 }
3149
3150 #ifdef CONFIG_BLK_DEV_ZONED
3151
3152 struct f2fs_report_zones_args {
3153         struct f2fs_dev_info *dev;
3154         bool zone_cap_mismatch;
3155 };
3156
3157 static int f2fs_report_zone_cb(struct blk_zone *zone, unsigned int idx,
3158                               void *data)
3159 {
3160         struct f2fs_report_zones_args *rz_args = data;
3161
3162         if (zone->type == BLK_ZONE_TYPE_CONVENTIONAL)
3163                 return 0;
3164
3165         set_bit(idx, rz_args->dev->blkz_seq);
3166         rz_args->dev->zone_capacity_blocks[idx] = zone->capacity >>
3167                                                 F2FS_LOG_SECTORS_PER_BLOCK;
3168         if (zone->len != zone->capacity && !rz_args->zone_cap_mismatch)
3169                 rz_args->zone_cap_mismatch = true;
3170
3171         return 0;
3172 }
3173
3174 static int init_blkz_info(struct f2fs_sb_info *sbi, int devi)
3175 {
3176         struct block_device *bdev = FDEV(devi).bdev;
3177         sector_t nr_sectors = bdev_nr_sectors(bdev);
3178         struct f2fs_report_zones_args rep_zone_arg;
3179         int ret;
3180
3181         if (!f2fs_sb_has_blkzoned(sbi))
3182                 return 0;
3183
3184         if (sbi->blocks_per_blkz && sbi->blocks_per_blkz !=
3185                                 SECTOR_TO_BLOCK(bdev_zone_sectors(bdev)))
3186                 return -EINVAL;
3187         sbi->blocks_per_blkz = SECTOR_TO_BLOCK(bdev_zone_sectors(bdev));
3188         if (sbi->log_blocks_per_blkz && sbi->log_blocks_per_blkz !=
3189                                 __ilog2_u32(sbi->blocks_per_blkz))
3190                 return -EINVAL;
3191         sbi->log_blocks_per_blkz = __ilog2_u32(sbi->blocks_per_blkz);
3192         FDEV(devi).nr_blkz = SECTOR_TO_BLOCK(nr_sectors) >>
3193                                         sbi->log_blocks_per_blkz;
3194         if (nr_sectors & (bdev_zone_sectors(bdev) - 1))
3195                 FDEV(devi).nr_blkz++;
3196
3197         FDEV(devi).blkz_seq = f2fs_kvzalloc(sbi,
3198                                         BITS_TO_LONGS(FDEV(devi).nr_blkz)
3199                                         * sizeof(unsigned long),
3200                                         GFP_KERNEL);
3201         if (!FDEV(devi).blkz_seq)
3202                 return -ENOMEM;
3203
3204         /* Get block zones type and zone-capacity */
3205         FDEV(devi).zone_capacity_blocks = f2fs_kzalloc(sbi,
3206                                         FDEV(devi).nr_blkz * sizeof(block_t),
3207                                         GFP_KERNEL);
3208         if (!FDEV(devi).zone_capacity_blocks)
3209                 return -ENOMEM;
3210
3211         rep_zone_arg.dev = &FDEV(devi);
3212         rep_zone_arg.zone_cap_mismatch = false;
3213
3214         ret = blkdev_report_zones(bdev, 0, BLK_ALL_ZONES, f2fs_report_zone_cb,
3215                                   &rep_zone_arg);
3216         if (ret < 0)
3217                 return ret;
3218
3219         if (!rep_zone_arg.zone_cap_mismatch) {
3220                 kfree(FDEV(devi).zone_capacity_blocks);
3221                 FDEV(devi).zone_capacity_blocks = NULL;
3222         }
3223
3224         return 0;
3225 }
3226 #endif
3227
3228 /*
3229  * Read f2fs raw super block.
3230  * Because we have two copies of super block, so read both of them
3231  * to get the first valid one. If any one of them is broken, we pass
3232  * them recovery flag back to the caller.
3233  */
3234 static int read_raw_super_block(struct f2fs_sb_info *sbi,
3235                         struct f2fs_super_block **raw_super,
3236                         int *valid_super_block, int *recovery)
3237 {
3238         struct super_block *sb = sbi->sb;
3239         int block;
3240         struct buffer_head *bh;
3241         struct f2fs_super_block *super;
3242         int err = 0;
3243
3244         super = kzalloc(sizeof(struct f2fs_super_block), GFP_KERNEL);
3245         if (!super)
3246                 return -ENOMEM;
3247
3248         for (block = 0; block < 2; block++) {
3249                 bh = sb_bread(sb, block);
3250                 if (!bh) {
3251                         f2fs_err(sbi, "Unable to read %dth superblock",
3252                                  block + 1);
3253                         err = -EIO;
3254                         *recovery = 1;
3255                         continue;
3256                 }
3257
3258                 /* sanity checking of raw super */
3259                 err = sanity_check_raw_super(sbi, bh);
3260                 if (err) {
3261                         f2fs_err(sbi, "Can't find valid F2FS filesystem in %dth superblock",
3262                                  block + 1);
3263                         brelse(bh);
3264                         *recovery = 1;
3265                         continue;
3266                 }
3267
3268                 if (!*raw_super) {
3269                         memcpy(super, bh->b_data + F2FS_SUPER_OFFSET,
3270                                                         sizeof(*super));
3271                         *valid_super_block = block;
3272                         *raw_super = super;
3273                 }
3274                 brelse(bh);
3275         }
3276
3277         /* No valid superblock */
3278         if (!*raw_super)
3279                 kfree(super);
3280         else
3281                 err = 0;
3282
3283         return err;
3284 }
3285
3286 int f2fs_commit_super(struct f2fs_sb_info *sbi, bool recover)
3287 {
3288         struct buffer_head *bh;
3289         __u32 crc = 0;
3290         int err;
3291
3292         if ((recover && f2fs_readonly(sbi->sb)) ||
3293                                 bdev_read_only(sbi->sb->s_bdev)) {
3294                 set_sbi_flag(sbi, SBI_NEED_SB_WRITE);
3295                 return -EROFS;
3296         }
3297
3298         /* we should update superblock crc here */
3299         if (!recover && f2fs_sb_has_sb_chksum(sbi)) {
3300                 crc = f2fs_crc32(sbi, F2FS_RAW_SUPER(sbi),
3301                                 offsetof(struct f2fs_super_block, crc));
3302                 F2FS_RAW_SUPER(sbi)->crc = cpu_to_le32(crc);
3303         }
3304
3305         /* write back-up superblock first */
3306         bh = sb_bread(sbi->sb, sbi->valid_super_block ? 0 : 1);
3307         if (!bh)
3308                 return -EIO;
3309         err = __f2fs_commit_super(bh, F2FS_RAW_SUPER(sbi));
3310         brelse(bh);
3311
3312         /* if we are in recovery path, skip writing valid superblock */
3313         if (recover || err)
3314                 return err;
3315
3316         /* write current valid superblock */
3317         bh = sb_bread(sbi->sb, sbi->valid_super_block);
3318         if (!bh)
3319                 return -EIO;
3320         err = __f2fs_commit_super(bh, F2FS_RAW_SUPER(sbi));
3321         brelse(bh);
3322         return err;
3323 }
3324
3325 static int f2fs_scan_devices(struct f2fs_sb_info *sbi)
3326 {
3327         struct f2fs_super_block *raw_super = F2FS_RAW_SUPER(sbi);
3328         unsigned int max_devices = MAX_DEVICES;
3329         int i;
3330
3331         /* Initialize single device information */
3332         if (!RDEV(0).path[0]) {
3333                 if (!bdev_is_zoned(sbi->sb->s_bdev))
3334                         return 0;
3335                 max_devices = 1;
3336         }
3337
3338         /*
3339          * Initialize multiple devices information, or single
3340          * zoned block device information.
3341          */
3342         sbi->devs = f2fs_kzalloc(sbi,
3343                                  array_size(max_devices,
3344                                             sizeof(struct f2fs_dev_info)),
3345                                  GFP_KERNEL);
3346         if (!sbi->devs)
3347                 return -ENOMEM;
3348
3349         for (i = 0; i < max_devices; i++) {
3350
3351                 if (i > 0 && !RDEV(i).path[0])
3352                         break;
3353
3354                 if (max_devices == 1) {
3355                         /* Single zoned block device mount */
3356                         FDEV(0).bdev =
3357                                 blkdev_get_by_dev(sbi->sb->s_bdev->bd_dev,
3358                                         sbi->sb->s_mode, sbi->sb->s_type);
3359                 } else {
3360                         /* Multi-device mount */
3361                         memcpy(FDEV(i).path, RDEV(i).path, MAX_PATH_LEN);
3362                         FDEV(i).total_segments =
3363                                 le32_to_cpu(RDEV(i).total_segments);
3364                         if (i == 0) {
3365                                 FDEV(i).start_blk = 0;
3366                                 FDEV(i).end_blk = FDEV(i).start_blk +
3367                                     (FDEV(i).total_segments <<
3368                                     sbi->log_blocks_per_seg) - 1 +
3369                                     le32_to_cpu(raw_super->segment0_blkaddr);
3370                         } else {
3371                                 FDEV(i).start_blk = FDEV(i - 1).end_blk + 1;
3372                                 FDEV(i).end_blk = FDEV(i).start_blk +
3373                                         (FDEV(i).total_segments <<
3374                                         sbi->log_blocks_per_seg) - 1;
3375                         }
3376                         FDEV(i).bdev = blkdev_get_by_path(FDEV(i).path,
3377                                         sbi->sb->s_mode, sbi->sb->s_type);
3378                 }
3379                 if (IS_ERR(FDEV(i).bdev))
3380                         return PTR_ERR(FDEV(i).bdev);
3381
3382                 /* to release errored devices */
3383                 sbi->s_ndevs = i + 1;
3384
3385 #ifdef CONFIG_BLK_DEV_ZONED
3386                 if (bdev_zoned_model(FDEV(i).bdev) == BLK_ZONED_HM &&
3387                                 !f2fs_sb_has_blkzoned(sbi)) {
3388                         f2fs_err(sbi, "Zoned block device feature not enabled\n");
3389                         return -EINVAL;
3390                 }
3391                 if (bdev_zoned_model(FDEV(i).bdev) != BLK_ZONED_NONE) {
3392                         if (init_blkz_info(sbi, i)) {
3393                                 f2fs_err(sbi, "Failed to initialize F2FS blkzone information");
3394                                 return -EINVAL;
3395                         }
3396                         if (max_devices == 1)
3397                                 break;
3398                         f2fs_info(sbi, "Mount Device [%2d]: %20s, %8u, %8x - %8x (zone: %s)",
3399                                   i, FDEV(i).path,
3400                                   FDEV(i).total_segments,
3401                                   FDEV(i).start_blk, FDEV(i).end_blk,
3402                                   bdev_zoned_model(FDEV(i).bdev) == BLK_ZONED_HA ?
3403                                   "Host-aware" : "Host-managed");
3404                         continue;
3405                 }
3406 #endif
3407                 f2fs_info(sbi, "Mount Device [%2d]: %20s, %8u, %8x - %8x",
3408                           i, FDEV(i).path,
3409                           FDEV(i).total_segments,
3410                           FDEV(i).start_blk, FDEV(i).end_blk);
3411         }
3412         f2fs_info(sbi,
3413                   "IO Block Size: %8d KB", F2FS_IO_SIZE_KB(sbi));
3414         return 0;
3415 }
3416
3417 static int f2fs_setup_casefold(struct f2fs_sb_info *sbi)
3418 {
3419 #ifdef CONFIG_UNICODE
3420         if (f2fs_sb_has_casefold(sbi) && !sbi->sb->s_encoding) {
3421                 const struct f2fs_sb_encodings *encoding_info;
3422                 struct unicode_map *encoding;
3423                 __u16 encoding_flags;
3424
3425                 if (f2fs_sb_read_encoding(sbi->raw_super, &encoding_info,
3426                                           &encoding_flags)) {
3427                         f2fs_err(sbi,
3428                                  "Encoding requested by superblock is unknown");
3429                         return -EINVAL;
3430                 }
3431
3432                 encoding = utf8_load(encoding_info->version);
3433                 if (IS_ERR(encoding)) {
3434                         f2fs_err(sbi,
3435                                  "can't mount with superblock charset: %s-%s "
3436                                  "not supported by the kernel. flags: 0x%x.",
3437                                  encoding_info->name, encoding_info->version,
3438                                  encoding_flags);
3439                         return PTR_ERR(encoding);
3440                 }
3441                 f2fs_info(sbi, "Using encoding defined by superblock: "
3442                          "%s-%s with flags 0x%hx", encoding_info->name,
3443                          encoding_info->version?:"\b", encoding_flags);
3444
3445                 sbi->sb->s_encoding = encoding;
3446                 sbi->sb->s_encoding_flags = encoding_flags;
3447         }
3448 #else
3449         if (f2fs_sb_has_casefold(sbi)) {
3450                 f2fs_err(sbi, "Filesystem with casefold feature cannot be mounted without CONFIG_UNICODE");
3451                 return -EINVAL;
3452         }
3453 #endif
3454         return 0;
3455 }
3456
3457 static void f2fs_tuning_parameters(struct f2fs_sb_info *sbi)
3458 {
3459         struct f2fs_sm_info *sm_i = SM_I(sbi);
3460
3461         /* adjust parameters according to the volume size */
3462         if (sm_i->main_segments <= SMALL_VOLUME_SEGMENTS) {
3463                 F2FS_OPTION(sbi).alloc_mode = ALLOC_MODE_REUSE;
3464                 sm_i->dcc_info->discard_granularity = 1;
3465                 sm_i->ipu_policy = 1 << F2FS_IPU_FORCE;
3466         }
3467
3468         sbi->readdir_ra = 1;
3469 }
3470
3471 static int f2fs_fill_super(struct super_block *sb, void *data, int silent)
3472 {
3473         struct f2fs_sb_info *sbi;
3474         struct f2fs_super_block *raw_super;
3475         struct inode *root;
3476         int err;
3477         bool skip_recovery = false, need_fsck = false;
3478         char *options = NULL;
3479         int recovery, i, valid_super_block;
3480         struct curseg_info *seg_i;
3481         int retry_cnt = 1;
3482
3483 try_onemore:
3484         err = -EINVAL;
3485         raw_super = NULL;
3486         valid_super_block = -1;
3487         recovery = 0;
3488
3489         /* allocate memory for f2fs-specific super block info */
3490         sbi = kzalloc(sizeof(struct f2fs_sb_info), GFP_KERNEL);
3491         if (!sbi)
3492                 return -ENOMEM;
3493
3494         sbi->sb = sb;
3495
3496         /* Load the checksum driver */
3497         sbi->s_chksum_driver = crypto_alloc_shash("crc32", 0, 0);
3498         if (IS_ERR(sbi->s_chksum_driver)) {
3499                 f2fs_err(sbi, "Cannot load crc32 driver.");
3500                 err = PTR_ERR(sbi->s_chksum_driver);
3501                 sbi->s_chksum_driver = NULL;
3502                 goto free_sbi;
3503         }
3504
3505         /* set a block size */
3506         if (unlikely(!sb_set_blocksize(sb, F2FS_BLKSIZE))) {
3507                 f2fs_err(sbi, "unable to set blocksize");
3508                 goto free_sbi;
3509         }
3510
3511         err = read_raw_super_block(sbi, &raw_super, &valid_super_block,
3512                                                                 &recovery);
3513         if (err)
3514                 goto free_sbi;
3515
3516         sb->s_fs_info = sbi;
3517         sbi->raw_super = raw_super;
3518
3519         /* precompute checksum seed for metadata */
3520         if (f2fs_sb_has_inode_chksum(sbi))
3521                 sbi->s_chksum_seed = f2fs_chksum(sbi, ~0, raw_super->uuid,
3522                                                 sizeof(raw_super->uuid));
3523
3524         default_options(sbi);
3525         /* parse mount options */
3526         options = kstrdup((const char *)data, GFP_KERNEL);
3527         if (data && !options) {
3528                 err = -ENOMEM;
3529                 goto free_sb_buf;
3530         }
3531
3532         err = parse_options(sb, options, false);
3533         if (err)
3534                 goto free_options;
3535
3536         sbi->max_file_blocks = max_file_blocks();
3537         sb->s_maxbytes = sbi->max_file_blocks <<
3538                                 le32_to_cpu(raw_super->log_blocksize);
3539         sb->s_max_links = F2FS_LINK_MAX;
3540
3541         err = f2fs_setup_casefold(sbi);
3542         if (err)
3543                 goto free_options;
3544
3545 #ifdef CONFIG_QUOTA
3546         sb->dq_op = &f2fs_quota_operations;
3547         sb->s_qcop = &f2fs_quotactl_ops;
3548         sb->s_quota_types = QTYPE_MASK_USR | QTYPE_MASK_GRP | QTYPE_MASK_PRJ;
3549
3550         if (f2fs_sb_has_quota_ino(sbi)) {
3551                 for (i = 0; i < MAXQUOTAS; i++) {
3552                         if (f2fs_qf_ino(sbi->sb, i))
3553                                 sbi->nquota_files++;
3554                 }
3555         }
3556 #endif
3557
3558         sb->s_op = &f2fs_sops;
3559 #ifdef CONFIG_FS_ENCRYPTION
3560         sb->s_cop = &f2fs_cryptops;
3561 #endif
3562 #ifdef CONFIG_FS_VERITY
3563         sb->s_vop = &f2fs_verityops;
3564 #endif
3565         sb->s_xattr = f2fs_xattr_handlers;
3566         sb->s_export_op = &f2fs_export_ops;
3567         sb->s_magic = F2FS_SUPER_MAGIC;
3568         sb->s_time_gran = 1;
3569         sb->s_flags = (sb->s_flags & ~SB_POSIXACL) |
3570                 (test_opt(sbi, POSIX_ACL) ? SB_POSIXACL : 0);
3571         memcpy(&sb->s_uuid, raw_super->uuid, sizeof(raw_super->uuid));
3572         sb->s_iflags |= SB_I_CGROUPWB;
3573
3574         /* init f2fs-specific super block info */
3575         sbi->valid_super_block = valid_super_block;
3576         init_rwsem(&sbi->gc_lock);
3577         mutex_init(&sbi->writepages);
3578         init_rwsem(&sbi->cp_global_sem);
3579         init_rwsem(&sbi->node_write);
3580         init_rwsem(&sbi->node_change);
3581
3582         /* disallow all the data/node/meta page writes */
3583         set_sbi_flag(sbi, SBI_POR_DOING);
3584         spin_lock_init(&sbi->stat_lock);
3585
3586         /* init iostat info */
3587         spin_lock_init(&sbi->iostat_lock);
3588         sbi->iostat_enable = false;
3589         sbi->iostat_period_ms = DEFAULT_IOSTAT_PERIOD_MS;
3590
3591         for (i = 0; i < NR_PAGE_TYPE; i++) {
3592                 int n = (i == META) ? 1: NR_TEMP_TYPE;
3593                 int j;
3594
3595                 sbi->write_io[i] =
3596                         f2fs_kmalloc(sbi,
3597                                      array_size(n,
3598                                                 sizeof(struct f2fs_bio_info)),
3599                                      GFP_KERNEL);
3600                 if (!sbi->write_io[i]) {
3601                         err = -ENOMEM;
3602                         goto free_bio_info;
3603                 }
3604
3605                 for (j = HOT; j < n; j++) {
3606                         init_rwsem(&sbi->write_io[i][j].io_rwsem);
3607                         sbi->write_io[i][j].sbi = sbi;
3608                         sbi->write_io[i][j].bio = NULL;
3609                         spin_lock_init(&sbi->write_io[i][j].io_lock);
3610                         INIT_LIST_HEAD(&sbi->write_io[i][j].io_list);
3611                         INIT_LIST_HEAD(&sbi->write_io[i][j].bio_list);
3612                         init_rwsem(&sbi->write_io[i][j].bio_list_lock);
3613                 }
3614         }
3615
3616         init_rwsem(&sbi->cp_rwsem);
3617         init_rwsem(&sbi->quota_sem);
3618         init_waitqueue_head(&sbi->cp_wait);
3619         init_sb_info(sbi);
3620
3621         err = init_percpu_info(sbi);
3622         if (err)
3623                 goto free_bio_info;
3624
3625         if (F2FS_IO_ALIGNED(sbi)) {
3626                 sbi->write_io_dummy =
3627                         mempool_create_page_pool(2 * (F2FS_IO_SIZE(sbi) - 1), 0);
3628                 if (!sbi->write_io_dummy) {
3629                         err = -ENOMEM;
3630                         goto free_percpu;
3631                 }
3632         }
3633
3634         /* init per sbi slab cache */
3635         err = f2fs_init_xattr_caches(sbi);
3636         if (err)
3637                 goto free_io_dummy;
3638         err = f2fs_init_page_array_cache(sbi);
3639         if (err)
3640                 goto free_xattr_cache;
3641
3642         /* get an inode for meta space */
3643         sbi->meta_inode = f2fs_iget(sb, F2FS_META_INO(sbi));
3644         if (IS_ERR(sbi->meta_inode)) {
3645                 f2fs_err(sbi, "Failed to read F2FS meta data inode");
3646                 err = PTR_ERR(sbi->meta_inode);
3647                 goto free_page_array_cache;
3648         }
3649
3650         err = f2fs_get_valid_checkpoint(sbi);
3651         if (err) {
3652                 f2fs_err(sbi, "Failed to get valid F2FS checkpoint");
3653                 goto free_meta_inode;
3654         }
3655
3656         if (__is_set_ckpt_flags(F2FS_CKPT(sbi), CP_QUOTA_NEED_FSCK_FLAG))
3657                 set_sbi_flag(sbi, SBI_QUOTA_NEED_REPAIR);
3658         if (__is_set_ckpt_flags(F2FS_CKPT(sbi), CP_DISABLED_QUICK_FLAG)) {
3659                 set_sbi_flag(sbi, SBI_CP_DISABLED_QUICK);
3660                 sbi->interval_time[DISABLE_TIME] = DEF_DISABLE_QUICK_INTERVAL;
3661         }
3662
3663         if (__is_set_ckpt_flags(F2FS_CKPT(sbi), CP_FSCK_FLAG))
3664                 set_sbi_flag(sbi, SBI_NEED_FSCK);
3665
3666         /* Initialize device list */
3667         err = f2fs_scan_devices(sbi);
3668         if (err) {
3669                 f2fs_err(sbi, "Failed to find devices");
3670                 goto free_devices;
3671         }
3672
3673         err = f2fs_init_post_read_wq(sbi);
3674         if (err) {
3675                 f2fs_err(sbi, "Failed to initialize post read workqueue");
3676                 goto free_devices;
3677         }
3678
3679         sbi->total_valid_node_count =
3680                                 le32_to_cpu(sbi->ckpt->valid_node_count);
3681         percpu_counter_set(&sbi->total_valid_inode_count,
3682                                 le32_to_cpu(sbi->ckpt->valid_inode_count));
3683         sbi->user_block_count = le64_to_cpu(sbi->ckpt->user_block_count);
3684         sbi->total_valid_block_count =
3685                                 le64_to_cpu(sbi->ckpt->valid_block_count);
3686         sbi->last_valid_block_count = sbi->total_valid_block_count;
3687         sbi->reserved_blocks = 0;
3688         sbi->current_reserved_blocks = 0;
3689         limit_reserve_root(sbi);
3690         adjust_unusable_cap_perc(sbi);
3691
3692         for (i = 0; i < NR_INODE_TYPE; i++) {
3693                 INIT_LIST_HEAD(&sbi->inode_list[i]);
3694                 spin_lock_init(&sbi->inode_lock[i]);
3695         }
3696         mutex_init(&sbi->flush_lock);
3697
3698         f2fs_init_extent_cache_info(sbi);
3699
3700         f2fs_init_ino_entry_info(sbi);
3701
3702         f2fs_init_fsync_node_info(sbi);
3703
3704         /* setup f2fs internal modules */
3705         err = f2fs_build_segment_manager(sbi);
3706         if (err) {
3707                 f2fs_err(sbi, "Failed to initialize F2FS segment manager (%d)",
3708                          err);
3709                 goto free_sm;
3710         }
3711         err = f2fs_build_node_manager(sbi);
3712         if (err) {
3713                 f2fs_err(sbi, "Failed to initialize F2FS node manager (%d)",
3714                          err);
3715                 goto free_nm;
3716         }
3717
3718         /* For write statistics */
3719         sbi->sectors_written_start = f2fs_get_sectors_written(sbi);
3720
3721         /* Read accumulated write IO statistics if exists */
3722         seg_i = CURSEG_I(sbi, CURSEG_HOT_NODE);
3723         if (__exist_node_summaries(sbi))
3724                 sbi->kbytes_written =
3725                         le64_to_cpu(seg_i->journal->info.kbytes_written);
3726
3727         f2fs_build_gc_manager(sbi);
3728
3729         err = f2fs_build_stats(sbi);
3730         if (err)
3731                 goto free_nm;
3732
3733         /* get an inode for node space */
3734         sbi->node_inode = f2fs_iget(sb, F2FS_NODE_INO(sbi));
3735         if (IS_ERR(sbi->node_inode)) {
3736                 f2fs_err(sbi, "Failed to read node inode");
3737                 err = PTR_ERR(sbi->node_inode);
3738                 goto free_stats;
3739         }
3740
3741         /* read root inode and dentry */
3742         root = f2fs_iget(sb, F2FS_ROOT_INO(sbi));
3743         if (IS_ERR(root)) {
3744                 f2fs_err(sbi, "Failed to read root inode");
3745                 err = PTR_ERR(root);
3746                 goto free_node_inode;
3747         }
3748         if (!S_ISDIR(root->i_mode) || !root->i_blocks ||
3749                         !root->i_size || !root->i_nlink) {
3750                 iput(root);
3751                 err = -EINVAL;
3752                 goto free_node_inode;
3753         }
3754
3755         sb->s_root = d_make_root(root); /* allocate root dentry */
3756         if (!sb->s_root) {
3757                 err = -ENOMEM;
3758                 goto free_node_inode;
3759         }
3760
3761         err = f2fs_register_sysfs(sbi);
3762         if (err)
3763                 goto free_root_inode;
3764
3765 #ifdef CONFIG_QUOTA
3766         /* Enable quota usage during mount */
3767         if (f2fs_sb_has_quota_ino(sbi) && !f2fs_readonly(sb)) {
3768                 err = f2fs_enable_quotas(sb);
3769                 if (err)
3770                         f2fs_err(sbi, "Cannot turn on quotas: error %d", err);
3771         }
3772 #endif
3773         /* if there are any orphan inodes, free them */
3774         err = f2fs_recover_orphan_inodes(sbi);
3775         if (err)
3776                 goto free_meta;
3777
3778         if (unlikely(is_set_ckpt_flags(sbi, CP_DISABLED_FLAG)))
3779                 goto reset_checkpoint;
3780
3781         /* recover fsynced data */
3782         if (!test_opt(sbi, DISABLE_ROLL_FORWARD) &&
3783                         !test_opt(sbi, NORECOVERY)) {
3784                 /*
3785                  * mount should be failed, when device has readonly mode, and
3786                  * previous checkpoint was not done by clean system shutdown.
3787                  */
3788                 if (f2fs_hw_is_readonly(sbi)) {
3789                         if (!is_set_ckpt_flags(sbi, CP_UMOUNT_FLAG)) {
3790                                 err = -EROFS;
3791                                 f2fs_err(sbi, "Need to recover fsync data, but write access unavailable");
3792                                 goto free_meta;
3793                         }
3794                         f2fs_info(sbi, "write access unavailable, skipping recovery");
3795                         goto reset_checkpoint;
3796                 }
3797
3798                 if (need_fsck)
3799                         set_sbi_flag(sbi, SBI_NEED_FSCK);
3800
3801                 if (skip_recovery)
3802                         goto reset_checkpoint;
3803
3804                 err = f2fs_recover_fsync_data(sbi, false);
3805                 if (err < 0) {
3806                         if (err != -ENOMEM)
3807                                 skip_recovery = true;
3808                         need_fsck = true;
3809                         f2fs_err(sbi, "Cannot recover all fsync data errno=%d",
3810                                  err);
3811                         goto free_meta;
3812                 }
3813         } else {
3814                 err = f2fs_recover_fsync_data(sbi, true);
3815
3816                 if (!f2fs_readonly(sb) && err > 0) {
3817                         err = -EINVAL;
3818                         f2fs_err(sbi, "Need to recover fsync data");
3819                         goto free_meta;
3820                 }
3821         }
3822
3823         /*
3824          * If the f2fs is not readonly and fsync data recovery succeeds,
3825          * check zoned block devices' write pointer consistency.
3826          */
3827         if (!err && !f2fs_readonly(sb) && f2fs_sb_has_blkzoned(sbi)) {
3828                 err = f2fs_check_write_pointer(sbi);
3829                 if (err)
3830                         goto free_meta;
3831         }
3832
3833 reset_checkpoint:
3834         f2fs_init_inmem_curseg(sbi);
3835
3836         /* f2fs_recover_fsync_data() cleared this already */
3837         clear_sbi_flag(sbi, SBI_POR_DOING);
3838
3839         if (test_opt(sbi, DISABLE_CHECKPOINT)) {
3840                 err = f2fs_disable_checkpoint(sbi);
3841                 if (err)
3842                         goto sync_free_meta;
3843         } else if (is_set_ckpt_flags(sbi, CP_DISABLED_FLAG)) {
3844                 f2fs_enable_checkpoint(sbi);
3845         }
3846
3847         /*
3848          * If filesystem is not mounted as read-only then
3849          * do start the gc_thread.
3850          */
3851         if (F2FS_OPTION(sbi).bggc_mode != BGGC_MODE_OFF && !f2fs_readonly(sb)) {
3852                 /* After POR, we can run background GC thread.*/
3853                 err = f2fs_start_gc_thread(sbi);
3854                 if (err)
3855                         goto sync_free_meta;
3856         }
3857         kvfree(options);
3858
3859         /* recover broken superblock */
3860         if (recovery) {
3861                 err = f2fs_commit_super(sbi, true);
3862                 f2fs_info(sbi, "Try to recover %dth superblock, ret: %d",
3863                           sbi->valid_super_block ? 1 : 2, err);
3864         }
3865
3866         f2fs_join_shrinker(sbi);
3867
3868         f2fs_tuning_parameters(sbi);
3869
3870         f2fs_notice(sbi, "Mounted with checkpoint version = %llx",
3871                     cur_cp_version(F2FS_CKPT(sbi)));
3872         f2fs_update_time(sbi, CP_TIME);
3873         f2fs_update_time(sbi, REQ_TIME);
3874         clear_sbi_flag(sbi, SBI_CP_DISABLED_QUICK);
3875         return 0;
3876
3877 sync_free_meta:
3878         /* safe to flush all the data */
3879         sync_filesystem(sbi->sb);
3880         retry_cnt = 0;
3881
3882 free_meta:
3883 #ifdef CONFIG_QUOTA
3884         f2fs_truncate_quota_inode_pages(sb);
3885         if (f2fs_sb_has_quota_ino(sbi) && !f2fs_readonly(sb))
3886                 f2fs_quota_off_umount(sbi->sb);
3887 #endif
3888         /*
3889          * Some dirty meta pages can be produced by f2fs_recover_orphan_inodes()
3890          * failed by EIO. Then, iput(node_inode) can trigger balance_fs_bg()
3891          * followed by f2fs_write_checkpoint() through f2fs_write_node_pages(), which
3892          * falls into an infinite loop in f2fs_sync_meta_pages().
3893          */
3894         truncate_inode_pages_final(META_MAPPING(sbi));
3895         /* evict some inodes being cached by GC */
3896         evict_inodes(sb);
3897         f2fs_unregister_sysfs(sbi);
3898 free_root_inode:
3899         dput(sb->s_root);
3900         sb->s_root = NULL;
3901 free_node_inode:
3902         f2fs_release_ino_entry(sbi, true);
3903         truncate_inode_pages_final(NODE_MAPPING(sbi));
3904         iput(sbi->node_inode);
3905         sbi->node_inode = NULL;
3906 free_stats:
3907         f2fs_destroy_stats(sbi);
3908 free_nm:
3909         f2fs_destroy_node_manager(sbi);
3910 free_sm:
3911         f2fs_destroy_segment_manager(sbi);
3912         f2fs_destroy_post_read_wq(sbi);
3913 free_devices:
3914         destroy_device_list(sbi);
3915         kvfree(sbi->ckpt);
3916 free_meta_inode:
3917         make_bad_inode(sbi->meta_inode);
3918         iput(sbi->meta_inode);
3919         sbi->meta_inode = NULL;
3920 free_page_array_cache:
3921         f2fs_destroy_page_array_cache(sbi);
3922 free_xattr_cache:
3923         f2fs_destroy_xattr_caches(sbi);
3924 free_io_dummy:
3925         mempool_destroy(sbi->write_io_dummy);
3926 free_percpu:
3927         destroy_percpu_info(sbi);
3928 free_bio_info:
3929         for (i = 0; i < NR_PAGE_TYPE; i++)
3930                 kvfree(sbi->write_io[i]);
3931
3932 #ifdef CONFIG_UNICODE
3933         utf8_unload(sb->s_encoding);
3934         sb->s_encoding = NULL;
3935 #endif
3936 free_options:
3937 #ifdef CONFIG_QUOTA
3938         for (i = 0; i < MAXQUOTAS; i++)
3939                 kfree(F2FS_OPTION(sbi).s_qf_names[i]);
3940 #endif
3941         fscrypt_free_dummy_policy(&F2FS_OPTION(sbi).dummy_enc_policy);
3942         kvfree(options);
3943 free_sb_buf:
3944         kfree(raw_super);
3945 free_sbi:
3946         if (sbi->s_chksum_driver)
3947                 crypto_free_shash(sbi->s_chksum_driver);
3948         kfree(sbi);
3949
3950         /* give only one another chance */
3951         if (retry_cnt > 0 && skip_recovery) {
3952                 retry_cnt--;
3953                 shrink_dcache_sb(sb);
3954                 goto try_onemore;
3955         }
3956         return err;
3957 }
3958
3959 static struct dentry *f2fs_mount(struct file_system_type *fs_type, int flags,
3960                         const char *dev_name, void *data)
3961 {
3962         return mount_bdev(fs_type, flags, dev_name, data, f2fs_fill_super);
3963 }
3964
3965 static void kill_f2fs_super(struct super_block *sb)
3966 {
3967         if (sb->s_root) {
3968                 struct f2fs_sb_info *sbi = F2FS_SB(sb);
3969
3970                 set_sbi_flag(sbi, SBI_IS_CLOSE);
3971                 f2fs_stop_gc_thread(sbi);
3972                 f2fs_stop_discard_thread(sbi);
3973
3974                 if (is_sbi_flag_set(sbi, SBI_IS_DIRTY) ||
3975                                 !is_set_ckpt_flags(sbi, CP_UMOUNT_FLAG)) {
3976                         struct cp_control cpc = {
3977                                 .reason = CP_UMOUNT,
3978                         };
3979                         f2fs_write_checkpoint(sbi, &cpc);
3980                 }
3981
3982                 if (is_sbi_flag_set(sbi, SBI_IS_RECOVERED) && f2fs_readonly(sb))
3983                         sb->s_flags &= ~SB_RDONLY;
3984         }
3985         kill_block_super(sb);
3986 }
3987
3988 static struct file_system_type f2fs_fs_type = {
3989         .owner          = THIS_MODULE,
3990         .name           = "f2fs",
3991         .mount          = f2fs_mount,
3992         .kill_sb        = kill_f2fs_super,
3993         .fs_flags       = FS_REQUIRES_DEV,
3994 };
3995 MODULE_ALIAS_FS("f2fs");
3996
3997 static int __init init_inodecache(void)
3998 {
3999         f2fs_inode_cachep = kmem_cache_create("f2fs_inode_cache",
4000                         sizeof(struct f2fs_inode_info), 0,
4001                         SLAB_RECLAIM_ACCOUNT|SLAB_ACCOUNT, NULL);
4002         if (!f2fs_inode_cachep)
4003                 return -ENOMEM;
4004         return 0;
4005 }
4006
4007 static void destroy_inodecache(void)
4008 {
4009         /*
4010          * Make sure all delayed rcu free inodes are flushed before we
4011          * destroy cache.
4012          */
4013         rcu_barrier();
4014         kmem_cache_destroy(f2fs_inode_cachep);
4015 }
4016
4017 static int __init init_f2fs_fs(void)
4018 {
4019         int err;
4020
4021         if (PAGE_SIZE != F2FS_BLKSIZE) {
4022                 printk("F2FS not supported on PAGE_SIZE(%lu) != %d\n",
4023                                 PAGE_SIZE, F2FS_BLKSIZE);
4024                 return -EINVAL;
4025         }
4026
4027         f2fs_build_trace_ios();
4028
4029         err = init_inodecache();
4030         if (err)
4031                 goto fail;
4032         err = f2fs_create_node_manager_caches();
4033         if (err)
4034                 goto free_inodecache;
4035         err = f2fs_create_segment_manager_caches();
4036         if (err)
4037                 goto free_node_manager_caches;
4038         err = f2fs_create_checkpoint_caches();
4039         if (err)
4040                 goto free_segment_manager_caches;
4041         err = f2fs_create_extent_cache();
4042         if (err)
4043                 goto free_checkpoint_caches;
4044         err = f2fs_create_garbage_collection_cache();
4045         if (err)
4046                 goto free_extent_cache;
4047         err = f2fs_init_sysfs();
4048         if (err)
4049                 goto free_garbage_collection_cache;
4050         err = register_shrinker(&f2fs_shrinker_info);
4051         if (err)
4052                 goto free_sysfs;
4053         err = register_filesystem(&f2fs_fs_type);
4054         if (err)
4055                 goto free_shrinker;
4056         f2fs_create_root_stats();
4057         err = f2fs_init_post_read_processing();
4058         if (err)
4059                 goto free_root_stats;
4060         err = f2fs_init_bio_entry_cache();
4061         if (err)
4062                 goto free_post_read;
4063         err = f2fs_init_bioset();
4064         if (err)
4065                 goto free_bio_enrty_cache;
4066         err = f2fs_init_compress_mempool();
4067         if (err)
4068                 goto free_bioset;
4069         err = f2fs_init_compress_cache();
4070         if (err)
4071                 goto free_compress_mempool;
4072         return 0;
4073 free_compress_mempool:
4074         f2fs_destroy_compress_mempool();
4075 free_bioset:
4076         f2fs_destroy_bioset();
4077 free_bio_enrty_cache:
4078         f2fs_destroy_bio_entry_cache();
4079 free_post_read:
4080         f2fs_destroy_post_read_processing();
4081 free_root_stats:
4082         f2fs_destroy_root_stats();
4083         unregister_filesystem(&f2fs_fs_type);
4084 free_shrinker:
4085         unregister_shrinker(&f2fs_shrinker_info);
4086 free_sysfs:
4087         f2fs_exit_sysfs();
4088 free_garbage_collection_cache:
4089         f2fs_destroy_garbage_collection_cache();
4090 free_extent_cache:
4091         f2fs_destroy_extent_cache();
4092 free_checkpoint_caches:
4093         f2fs_destroy_checkpoint_caches();
4094 free_segment_manager_caches:
4095         f2fs_destroy_segment_manager_caches();
4096 free_node_manager_caches:
4097         f2fs_destroy_node_manager_caches();
4098 free_inodecache:
4099         destroy_inodecache();
4100 fail:
4101         return err;
4102 }
4103
4104 static void __exit exit_f2fs_fs(void)
4105 {
4106         f2fs_destroy_compress_cache();
4107         f2fs_destroy_compress_mempool();
4108         f2fs_destroy_bioset();
4109         f2fs_destroy_bio_entry_cache();
4110         f2fs_destroy_post_read_processing();
4111         f2fs_destroy_root_stats();
4112         unregister_filesystem(&f2fs_fs_type);
4113         unregister_shrinker(&f2fs_shrinker_info);
4114         f2fs_exit_sysfs();
4115         f2fs_destroy_garbage_collection_cache();
4116         f2fs_destroy_extent_cache();
4117         f2fs_destroy_checkpoint_caches();
4118         f2fs_destroy_segment_manager_caches();
4119         f2fs_destroy_node_manager_caches();
4120         destroy_inodecache();
4121         f2fs_destroy_trace_ios();
4122 }
4123
4124 module_init(init_f2fs_fs)
4125 module_exit(exit_f2fs_fs)
4126
4127 MODULE_AUTHOR("Samsung Electronics's Praesto Team");
4128 MODULE_DESCRIPTION("Flash Friendly File System");
4129 MODULE_LICENSE("GPL");
4130